diff --git a/sys/netinet/sctp_usrreq.c b/sys/netinet/sctp_usrreq.c index fdb195d79656..4c70b618bf41 100644 --- a/sys/netinet/sctp_usrreq.c +++ b/sys/netinet/sctp_usrreq.c @@ -1,7558 +1,7551 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * a) Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * b) Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. * * c) Neither the name of Cisco Systems, Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #ifdef INET6 #include #endif #include #include #include #include #include #include #include #include #include #include #include extern const struct sctp_cc_functions sctp_cc_functions[]; extern const struct sctp_ss_functions sctp_ss_functions[]; static void sctp_init(void *arg SCTP_UNUSED) { u_long sb_max_adj; /* Initialize and modify the sysctled variables */ sctp_init_sysctls(); if ((nmbclusters / 8) > SCTP_ASOC_MAX_CHUNKS_ON_QUEUE) SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue) = (nmbclusters / 8); /* * Allow a user to take no more than 1/2 the number of clusters or * the SB_MAX, whichever is smaller, for the send window. */ sb_max_adj = (u_long)((u_quad_t)(SB_MAX) * MCLBYTES / (MSIZE + MCLBYTES)); SCTP_BASE_SYSCTL(sctp_sendspace) = min(sb_max_adj, (((uint32_t)nmbclusters / 2) * MCLBYTES)); /* * Now for the recv window, should we take the same amount? or * should I do 1/2 the SB_MAX instead in the SB_MAX min above. For * now I will just copy. */ SCTP_BASE_SYSCTL(sctp_recvspace) = SCTP_BASE_SYSCTL(sctp_sendspace); SCTP_BASE_VAR(first_time) = 0; SCTP_BASE_VAR(sctp_pcb_initialized) = 0; sctp_pcb_init(); #if defined(SCTP_PACKET_LOGGING) SCTP_BASE_VAR(packet_log_writers) = 0; SCTP_BASE_VAR(packet_log_end) = 0; memset(&SCTP_BASE_VAR(packet_log_buffer), 0, SCTP_PACKET_LOG_SIZE); #endif SCTP_BASE_VAR(eh_tag) = EVENTHANDLER_REGISTER(rt_addrmsg, sctp_addr_change_event_handler, NULL, EVENTHANDLER_PRI_FIRST); } VNET_SYSINIT(sctp_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, sctp_init, NULL); #ifdef VIMAGE static void sctp_finish(void *unused __unused) { EVENTHANDLER_DEREGISTER(rt_addrmsg, SCTP_BASE_VAR(eh_tag)); sctp_pcb_finish(); } VNET_SYSUNINIT(sctp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, sctp_finish, NULL); #endif void sctp_pathmtu_adjustment(struct sctp_tcb *stcb, uint32_t mtu, bool resend) { struct sctp_association *asoc; struct sctp_tmit_chunk *chk; uint32_t overhead; asoc = &stcb->asoc; KASSERT(mtu < asoc->smallest_mtu, ("Currently only reducing association MTU %u supported (MTU %u)", asoc->smallest_mtu, mtu)); asoc->smallest_mtu = mtu; if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { overhead = SCTP_MIN_OVERHEAD; } else { overhead = SCTP_MIN_V4_OVERHEAD; } if (asoc->idata_supported) { if (sctp_auth_is_required_chunk(SCTP_IDATA, asoc->peer_auth_chunks)) { overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id); } } else { if (sctp_auth_is_required_chunk(SCTP_DATA, asoc->peer_auth_chunks)) { overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id); } } KASSERT(overhead % 4 == 0, ("overhead (%u) not a multiple of 4", overhead)); TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { if (((uint32_t)chk->send_size + overhead) > mtu) { chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; } } TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { if (((uint32_t)chk->send_size + overhead) > mtu) { chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; if (resend && chk->sent < SCTP_DATAGRAM_RESEND) { /* * If requested, mark the chunk for * immediate resend, since we sent it being * too big. */ sctp_flight_size_decrease(chk); sctp_total_flight_decrease(stcb, chk); chk->sent = SCTP_DATAGRAM_RESEND; sctp_ucount_incr(asoc->sent_queue_retran_cnt); chk->rec.data.doing_fast_retransmit = 0; if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PMTU, chk->whoTo->flight_size, chk->book_size, (uint32_t)(uintptr_t)chk->whoTo, chk->rec.data.tsn); } /* Clear any time, so NO RTT is being done. */ if (chk->do_rtt == 1) { chk->do_rtt = 0; chk->whoTo->rto_needed = 1; } } } } } #ifdef INET void sctp_notify(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint8_t icmp_type, uint8_t icmp_code, uint16_t ip_len, uint32_t next_mtu) { int timer_stopped; if (icmp_type != ICMP_UNREACH) { /* We only care about unreachable */ SCTP_TCB_UNLOCK(stcb); return; } if ((icmp_code == ICMP_UNREACH_NET) || (icmp_code == ICMP_UNREACH_HOST) || (icmp_code == ICMP_UNREACH_NET_UNKNOWN) || (icmp_code == ICMP_UNREACH_HOST_UNKNOWN) || (icmp_code == ICMP_UNREACH_ISOLATED) || (icmp_code == ICMP_UNREACH_NET_PROHIB) || (icmp_code == ICMP_UNREACH_HOST_PROHIB) || (icmp_code == ICMP_UNREACH_FILTER_PROHIB)) { /* Mark the net unreachable. */ if (net->dest_state & SCTP_ADDR_REACHABLE) { /* OK, that destination is NOT reachable. */ net->dest_state &= ~SCTP_ADDR_REACHABLE; net->dest_state &= ~SCTP_ADDR_PF; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); } SCTP_TCB_UNLOCK(stcb); } else if ((icmp_code == ICMP_UNREACH_PROTOCOL) || (icmp_code == ICMP_UNREACH_PORT)) { /* Treat it like an ABORT. */ sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED); (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); /* no need to unlock here, since the TCB is gone */ } else if (icmp_code == ICMP_UNREACH_NEEDFRAG) { if (net->dest_state & SCTP_ADDR_NO_PMTUD) { SCTP_TCB_UNLOCK(stcb); return; } /* Find the next (smaller) MTU */ if (next_mtu == 0) { /* * Old type router that does not tell us what the * next MTU is. Rats we will have to guess (in a * educated fashion of course). */ next_mtu = sctp_get_prev_mtu(ip_len); } /* Stop the PMTU timer. */ if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { timer_stopped = 1; sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); } else { timer_stopped = 0; } /* Update the path MTU. */ if (net->port) { next_mtu -= sizeof(struct udphdr); } if (net->mtu > next_mtu) { net->mtu = next_mtu; if (net->port) { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); } else { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); } } /* Update the association MTU */ if (stcb->asoc.smallest_mtu > next_mtu) { sctp_pathmtu_adjustment(stcb, next_mtu, true); } /* Finally, start the PMTU timer if it was running before. */ if (timer_stopped) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); } SCTP_TCB_UNLOCK(stcb); } else { SCTP_TCB_UNLOCK(stcb); } } void -sctp_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *ip) +sctp_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *inner_ip) { struct ip *outer_ip; - struct ip *inner_ip; struct sctphdr *sh; struct icmp *icmp; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; struct sctp_init_chunk *ch; struct sockaddr_in src, dst; - if (PRC_IS_REDIRECT(cmd)) { - ip = NULL; - } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) { + if (inetctlerrmap[cmd] == 0) return; - } - if (ip != NULL) { - inner_ip = ip; - icmp = (struct icmp *)((caddr_t)inner_ip - - (sizeof(struct icmp) - sizeof(struct ip))); - outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip)); - sh = (struct sctphdr *)((caddr_t)inner_ip + (inner_ip->ip_hl << 2)); - memset(&src, 0, sizeof(struct sockaddr_in)); - src.sin_family = AF_INET; - src.sin_len = sizeof(struct sockaddr_in); - src.sin_port = sh->src_port; - src.sin_addr = inner_ip->ip_src; - memset(&dst, 0, sizeof(struct sockaddr_in)); - dst.sin_family = AF_INET; - dst.sin_len = sizeof(struct sockaddr_in); - dst.sin_port = sh->dest_port; - dst.sin_addr = inner_ip->ip_dst; - /* - * 'dst' holds the dest of the packet that failed to be - * sent. 'src' holds our local endpoint address. Thus we - * reverse the dst and the src in the lookup. - */ - inp = NULL; - net = NULL; - stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, - (struct sockaddr *)&src, - &inp, &net, 1, - SCTP_DEFAULT_VRFID); - if ((stcb != NULL) && - (net != NULL) && - (inp != NULL)) { - /* Check the verification tag */ - if (ntohl(sh->v_tag) != 0) { + + icmp = (struct icmp *)((caddr_t)inner_ip - + (sizeof(struct icmp) - sizeof(struct ip))); + outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip)); + sh = (struct sctphdr *)((caddr_t)inner_ip + (inner_ip->ip_hl << 2)); + memset(&src, 0, sizeof(struct sockaddr_in)); + src.sin_family = AF_INET; + src.sin_len = sizeof(struct sockaddr_in); + src.sin_port = sh->src_port; + src.sin_addr = inner_ip->ip_src; + memset(&dst, 0, sizeof(struct sockaddr_in)); + dst.sin_family = AF_INET; + dst.sin_len = sizeof(struct sockaddr_in); + dst.sin_port = sh->dest_port; + dst.sin_addr = inner_ip->ip_dst; + /* + * 'dst' holds the dest of the packet that failed to be + * sent. 'src' holds our local endpoint address. Thus we + * reverse the dst and the src in the lookup. + */ + inp = NULL; + net = NULL; + stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, + (struct sockaddr *)&src, + &inp, &net, 1, + SCTP_DEFAULT_VRFID); + if ((stcb != NULL) && + (net != NULL) && + (inp != NULL)) { + /* Check the verification tag */ + if (ntohl(sh->v_tag) != 0) { + /* + * This must be the verification tag used + * for sending out packets. We don't + * consider packets reflecting the + * verification tag. + */ + if (ntohl(sh->v_tag) != stcb->asoc.peer_vtag) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { + if (ntohs(outer_ip->ip_len) >= + sizeof(struct ip) + + 8 + (inner_ip->ip_hl << 2) + 20) { /* - * This must be the verification tag used - * for sending out packets. We don't - * consider packets reflecting the - * verification tag. + * In this case we can check if we + * got an INIT chunk and if the + * initiate tag matches. */ - if (ntohl(sh->v_tag) != stcb->asoc.peer_vtag) { + ch = (struct sctp_init_chunk *)(sh + 1); + if ((ch->ch.chunk_type != SCTP_INITIATION) || + (ntohl(ch->init.initiate_tag) != stcb->asoc.my_vtag)) { SCTP_TCB_UNLOCK(stcb); return; } } else { - if (ntohs(outer_ip->ip_len) >= - sizeof(struct ip) + - 8 + (inner_ip->ip_hl << 2) + 20) { - /* - * In this case we can check if we - * got an INIT chunk and if the - * initiate tag matches. - */ - ch = (struct sctp_init_chunk *)(sh + 1); - if ((ch->ch.chunk_type != SCTP_INITIATION) || - (ntohl(ch->init.initiate_tag) != stcb->asoc.my_vtag)) { - SCTP_TCB_UNLOCK(stcb); - return; - } - } else { - SCTP_TCB_UNLOCK(stcb); - return; - } - } - sctp_notify(inp, stcb, net, - icmp->icmp_type, - icmp->icmp_code, - ntohs(inner_ip->ip_len), - (uint32_t)ntohs(icmp->icmp_nextmtu)); - } else { - if ((stcb == NULL) && (inp != NULL)) { - /* reduce ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } - if (stcb) { SCTP_TCB_UNLOCK(stcb); + return; } } + sctp_notify(inp, stcb, net, + icmp->icmp_type, + icmp->icmp_code, + ntohs(inner_ip->ip_len), + (uint32_t)ntohs(icmp->icmp_nextmtu)); + } else { + if ((stcb == NULL) && (inp != NULL)) { + /* reduce ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } } - return; } #endif static int sctp_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in addrs[2]; struct sctp_inpcb *inp; struct sctp_nets *net; struct sctp_tcb *stcb; int error; uint32_t vrf_id; /* FIX, for non-bsd is this right? */ vrf_id = SCTP_DEFAULT_VRFID; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); stcb = sctp_findassociation_addr_sa(sintosa(&addrs[1]), sintosa(&addrs[0]), &inp, &net, 1, vrf_id); if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { if ((inp != NULL) && (stcb == NULL)) { /* reduce ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); goto cred_can_cont; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; goto out; } SCTP_TCB_UNLOCK(stcb); /* * We use the write lock here, only since in the error leg we need * it. If we used RLOCK, then we would have to * wlock/decr/unlock/rlock. Which in theory could create a hole. * Better to use higher wlock. */ SCTP_INP_WLOCK(inp); cred_can_cont: error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); if (error) { SCTP_INP_WUNLOCK(inp); goto out; } cru2x(inp->sctp_socket->so_cred, &xuc); SCTP_INP_WUNLOCK(inp); error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); out: return (error); } SYSCTL_PROC(_net_inet_sctp, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0, sctp_getcred, "S,ucred", "Get the ucred of a SCTP connection"); #ifdef INET static void sctp_abort(struct socket *so) { struct epoch_tracker et; struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { return; } SCTP_INP_WLOCK(inp); NET_EPOCH_ENTER(et); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 17); #endif if (((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0)) { inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP; #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 16); #endif SCTP_INP_WUNLOCK(inp); sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, SCTP_CALLED_AFTER_CMPSET_OFCLOSE); SOCK_LOCK(so); KASSERT(!SOLISTENING(so), ("sctp_abort: called on listening socket %p", so)); SCTP_SB_CLEAR(so->so_snd); SCTP_SB_CLEAR(so->so_rcv); /* Now null out the reference, we are completely detached. */ so->so_pcb = NULL; SOCK_UNLOCK(so); } else { SCTP_INP_WUNLOCK(inp); } NET_EPOCH_EXIT(et); } static int sctp_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) { struct sctp_inpcb *inp; struct inpcb *ip_inp; int error; uint32_t vrf_id = SCTP_DEFAULT_VRFID; inp = (struct sctp_inpcb *)so->so_pcb; if (inp != NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); if (error) { return (error); } } error = sctp_inpcb_alloc(so, vrf_id); if (error) { return (error); } inp = (struct sctp_inpcb *)so->so_pcb; SCTP_INP_WLOCK(inp); inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUND_V6; /* I'm not v6! */ ip_inp = &inp->ip_inp.inp; ip_inp->inp_vflag |= INP_IPV4; ip_inp->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); SCTP_INP_WUNLOCK(inp); return (0); } static int sctp_bind(struct socket *so, struct sockaddr *addr, struct thread *p) { struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if (addr != NULL) { if ((addr->sa_family != AF_INET) || (addr->sa_len != sizeof(struct sockaddr_in))) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } } return (sctp_inpcb_bind(so, addr, NULL, p)); } #endif void sctp_close(struct socket *so) { struct epoch_tracker et; struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) return; /* * Inform all the lower layer assoc that we are done. */ SCTP_INP_WLOCK(inp); NET_EPOCH_ENTER(et); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 17); #endif if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP; if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || (SCTP_SBAVAIL(&so->so_rcv) > 0)) { #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 13); #endif SCTP_INP_WUNLOCK(inp); sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, SCTP_CALLED_AFTER_CMPSET_OFCLOSE); } else { #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 14); #endif SCTP_INP_WUNLOCK(inp); sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, SCTP_CALLED_AFTER_CMPSET_OFCLOSE); } /* * The socket is now detached, no matter what the state of * the SCTP association. */ SOCK_LOCK(so); if (!SOLISTENING(so)) { SCTP_SB_CLEAR(so->so_snd); SCTP_SB_CLEAR(so->so_rcv); } /* Now null out the reference, we are completely detached. */ so->so_pcb = NULL; SOCK_UNLOCK(so); } else { SCTP_INP_WUNLOCK(inp); } NET_EPOCH_EXIT(et); } int sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p); int sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p) { struct sctp_inpcb *inp; int error; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { if (control) { sctp_m_freem(control); control = NULL; } SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); sctp_m_freem(m); return (EINVAL); } /* Got to have an to address if we are NOT a connected socket */ if ((addr == NULL) && ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE))) { goto connected_type; } error = 0; if (addr == NULL) { SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EDESTADDRREQ); error = EDESTADDRREQ; } else if (addr->sa_family != AF_INET) { SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EAFNOSUPPORT); error = EAFNOSUPPORT; } else if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } if (error != 0) { sctp_m_freem(m); if (control) { sctp_m_freem(control); control = NULL; } return (error); } connected_type: /* now what about control */ if (control) { if (inp->control) { sctp_m_freem(inp->control); inp->control = NULL; } inp->control = control; } /* Place the data */ if (inp->pkt) { SCTP_BUF_NEXT(inp->pkt_last) = m; inp->pkt_last = m; } else { inp->pkt_last = inp->pkt = m; } if ( /* FreeBSD uses a flag passed */ ((flags & PRUS_MORETOCOME) == 0) ) { /* * note with the current version this code will only be used * by OpenBSD-- NetBSD, FreeBSD, and MacOS have methods for * re-defining sosend to use the sctp_sosend. One can * optionally switch back to this code (by changing back the * definitions) but this is not advisable. This code is used * by FreeBSD when sending a file with sendfile() though. */ struct epoch_tracker et; int ret; NET_EPOCH_ENTER(et); ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); NET_EPOCH_EXIT(et); inp->pkt = NULL; inp->control = NULL; return (ret); } else { return (0); } } int sctp_disconnect(struct socket *so) { struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTCONN); return (ENOTCONN); } SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { if (LIST_EMPTY(&inp->sctp_asoc_list)) { /* No connection */ SCTP_INP_RUNLOCK(inp); return (0); } else { struct epoch_tracker et; struct sctp_association *asoc; struct sctp_tcb *stcb; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } SCTP_TCB_LOCK(stcb); asoc = &stcb->asoc; if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { /* We are about to be freed, out of here */ SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); return (0); } NET_EPOCH_ENTER(et); if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || (SCTP_SBAVAIL(&so->so_rcv) > 0)) { if (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) { /* Left with Data unread */ struct mbuf *op_err; op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); SCTP_STAT_INCR_COUNTER32(sctps_aborted); } SCTP_INP_RUNLOCK(inp); if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_3); /* No unlock tcb assoc is gone */ NET_EPOCH_EXIT(et); return (0); } if (TAILQ_EMPTY(&asoc->send_queue) && TAILQ_EMPTY(&asoc->sent_queue) && (asoc->stream_queue_cnt == 0)) { /* there is nothing queued to send, so done */ if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) { goto abort_anyway; } if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) && (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { /* only send SHUTDOWN 1st time thru */ struct sctp_nets *netp; if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); sctp_stop_timers_for_shutdown(stcb); if (stcb->asoc.alternate) { netp = stcb->asoc.alternate; } else { netp = stcb->asoc.primary_destination; } sctp_send_shutdown(stcb, netp); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, netp); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_LOCKED); } } else { /* * we still got (or just got) data to send, * so set SHUTDOWN_PENDING */ /* * XXX sockets draft says that SCTP_EOF * should be sent with no data. currently, * we will allow user data to be sent first * and move to SHUTDOWN-PENDING */ SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) { SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); } if (TAILQ_EMPTY(&asoc->send_queue) && TAILQ_EMPTY(&asoc->sent_queue) && (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { struct mbuf *op_err; abort_anyway: op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_USRREQ + SCTP_LOC_4; sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); SCTP_STAT_INCR_COUNTER32(sctps_aborted); if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } SCTP_INP_RUNLOCK(inp); (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_5); NET_EPOCH_EXIT(et); return (0); } else { sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); } } soisdisconnecting(so); NET_EPOCH_EXIT(et); SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); return (0); } /* not reached */ } else { /* UDP model does not support this */ SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); return (EOPNOTSUPP); } } int sctp_flush(struct socket *so, int how) { /* * We will just clear out the values and let subsequent close clear * out the data, if any. Note if the user did a shutdown(SHUT_RD) * they will not be able to read the data, the socket will block * that from happening. */ struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } SCTP_INP_RLOCK(inp); /* For the 1 to many model this does nothing */ if (inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) { SCTP_INP_RUNLOCK(inp); return (0); } SCTP_INP_RUNLOCK(inp); if ((how == PRU_FLUSH_RD) || (how == PRU_FLUSH_RDWR)) { /* * First make sure the sb will be happy, we don't use these * except maybe the count */ SCTP_INP_WLOCK(inp); SCTP_INP_READ_LOCK(inp); inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_CANT_READ; SCTP_INP_READ_UNLOCK(inp); SCTP_INP_WUNLOCK(inp); SOCK_LOCK(so); KASSERT(!SOLISTENING(so), ("sctp_flush: called on listening socket %p", so)); SCTP_SB_CLEAR(so->so_rcv); SOCK_UNLOCK(so); } if ((how == PRU_FLUSH_WR) || (how == PRU_FLUSH_RDWR)) { /* * First make sure the sb will be happy, we don't use these * except maybe the count */ SOCK_LOCK(so); KASSERT(!SOLISTENING(so), ("sctp_flush: called on listening socket %p", so)); SCTP_SB_CLEAR(so->so_snd); SOCK_UNLOCK(so); } return (0); } int sctp_shutdown(struct socket *so) { struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } SCTP_INP_RLOCK(inp); /* For UDP model this is a invalid call */ if (!((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { /* Restore the flags that the soshutdown took away. */ SOCKBUF_LOCK(&so->so_rcv); so->so_rcv.sb_state &= ~SBS_CANTRCVMORE; SOCKBUF_UNLOCK(&so->so_rcv); /* This proc will wakeup for read and do nothing (I hope) */ SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); return (EOPNOTSUPP); } else { /* * Ok, if we reach here its the TCP model and it is either a * SHUT_WR or SHUT_RDWR. This means we put the shutdown flag * against it. */ struct epoch_tracker et; struct sctp_tcb *stcb; struct sctp_association *asoc; struct sctp_nets *netp; if ((so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING | SS_ISDISCONNECTING)) == 0) { SCTP_INP_RUNLOCK(inp); return (ENOTCONN); } socantsendmore(so); stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { /* * Ok, we hit the case that the shutdown call was * made after an abort or something. Nothing to do * now. */ SCTP_INP_RUNLOCK(inp); return (0); } SCTP_TCB_LOCK(stcb); asoc = &stcb->asoc; if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) { SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); return (0); } if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) && (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_ECHOED) && (SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN)) { /* * If we are not in or before ESTABLISHED, there is * no protocol action required. */ SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); return (0); } NET_EPOCH_ENTER(et); if (stcb->asoc.alternate) { netp = stcb->asoc.alternate; } else { netp = stcb->asoc.primary_destination; } if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) && TAILQ_EMPTY(&asoc->send_queue) && TAILQ_EMPTY(&asoc->sent_queue) && (asoc->stream_queue_cnt == 0)) { if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) { goto abort_anyway; } /* there is nothing queued to send, so I'm done... */ SCTP_STAT_DECR_GAUGE32(sctps_currestab); SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); sctp_stop_timers_for_shutdown(stcb); sctp_send_shutdown(stcb, netp); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, netp); } else { /* * We still got (or just got) data to send, so set * SHUTDOWN_PENDING. */ SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) { SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); } if (TAILQ_EMPTY(&asoc->send_queue) && TAILQ_EMPTY(&asoc->sent_queue) && (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { struct mbuf *op_err; abort_anyway: op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_USRREQ + SCTP_LOC_6; SCTP_INP_RUNLOCK(inp); sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, false, SCTP_SO_LOCKED); NET_EPOCH_EXIT(et); return (0); } } sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); /* * XXX: Why do this in the case where we have still data * queued? */ sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); NET_EPOCH_EXIT(et); return (0); } } /* * copies a "user" presentable address and removes embedded scope, etc. * returns 0 on success, 1 on error */ static uint32_t sctp_fill_user_address(struct sockaddr *dst, struct sockaddr *src) { #ifdef INET6 struct sockaddr_in6 lsa6; src = (struct sockaddr *)sctp_recover_scope((struct sockaddr_in6 *)src, &lsa6); #endif memcpy(dst, src, src->sa_len); return (0); } static size_t sctp_fill_up_addresses_vrf(struct sctp_inpcb *inp, struct sctp_tcb *stcb, size_t limit, struct sockaddr *addr, uint32_t vrf_id) { struct sctp_ifn *sctp_ifn; struct sctp_ifa *sctp_ifa; size_t actual; int loopback_scope; #if defined(INET) int ipv4_local_scope, ipv4_addr_legal; #endif #if defined(INET6) int local_scope, site_scope, ipv6_addr_legal; #endif struct sctp_vrf *vrf; SCTP_IPI_ADDR_LOCK_ASSERT(); actual = 0; if (limit == 0) return (actual); if (stcb) { /* Turn on all the appropriate scope */ loopback_scope = stcb->asoc.scope.loopback_scope; #if defined(INET) ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; #endif #if defined(INET6) local_scope = stcb->asoc.scope.local_scope; site_scope = stcb->asoc.scope.site_scope; ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; #endif } else { /* Use generic values for endpoints. */ loopback_scope = 1; #if defined(INET) ipv4_local_scope = 1; #endif #if defined(INET6) local_scope = 1; site_scope = 1; #endif if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { #if defined(INET6) ipv6_addr_legal = 1; #endif #if defined(INET) if (SCTP_IPV6_V6ONLY(inp)) { ipv4_addr_legal = 0; } else { ipv4_addr_legal = 1; } #endif } else { #if defined(INET6) ipv6_addr_legal = 0; #endif #if defined(INET) ipv4_addr_legal = 1; #endif } } vrf = sctp_find_vrf(vrf_id); if (vrf == NULL) { return (0); } if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { if ((loopback_scope == 0) && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { /* Skip loopback if loopback_scope not set */ continue; } LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { if (stcb) { /* * For the BOUND-ALL case, the list * associated with a TCB is Always * considered a reverse list.. i.e. * it lists addresses that are NOT * part of the association. If this * is one of those we must skip it. */ if (sctp_is_addr_restricted(stcb, sctp_ifa)) { continue; } } switch (sctp_ifa->address.sa.sa_family) { #ifdef INET case AF_INET: if (ipv4_addr_legal) { struct sockaddr_in *sin; sin = &sctp_ifa->address.sin; if (sin->sin_addr.s_addr == 0) { /* * we skip * unspecified * addresses */ continue; } if (prison_check_ip4(inp->ip_inp.inp.inp_cred, &sin->sin_addr) != 0) { continue; } if ((ipv4_local_scope == 0) && (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { continue; } #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { if (actual + sizeof(struct sockaddr_in6) > limit) { return (actual); } in6_sin_2_v4mapsin6(sin, (struct sockaddr_in6 *)addr); ((struct sockaddr_in6 *)addr)->sin6_port = inp->sctp_lport; addr = (struct sockaddr *)((caddr_t)addr + sizeof(struct sockaddr_in6)); actual += sizeof(struct sockaddr_in6); } else { #endif if (actual + sizeof(struct sockaddr_in) > limit) { return (actual); } memcpy(addr, sin, sizeof(struct sockaddr_in)); ((struct sockaddr_in *)addr)->sin_port = inp->sctp_lport; addr = (struct sockaddr *)((caddr_t)addr + sizeof(struct sockaddr_in)); actual += sizeof(struct sockaddr_in); #ifdef INET6 } #endif } else { continue; } break; #endif #ifdef INET6 case AF_INET6: if (ipv6_addr_legal) { struct sockaddr_in6 *sin6; sin6 = &sctp_ifa->address.sin6; if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { /* * we skip * unspecified * addresses */ continue; } if (prison_check_ip6(inp->ip_inp.inp.inp_cred, &sin6->sin6_addr) != 0) { continue; } if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { if (local_scope == 0) continue; if (sin6->sin6_scope_id == 0) { if (sa6_recoverscope(sin6) != 0) /* * * bad * link * * local * * address */ continue; } } if ((site_scope == 0) && (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { continue; } if (actual + sizeof(struct sockaddr_in6) > limit) { return (actual); } memcpy(addr, sin6, sizeof(struct sockaddr_in6)); ((struct sockaddr_in6 *)addr)->sin6_port = inp->sctp_lport; addr = (struct sockaddr *)((caddr_t)addr + sizeof(struct sockaddr_in6)); actual += sizeof(struct sockaddr_in6); } else { continue; } break; #endif default: /* TSNH */ break; } } } } else { struct sctp_laddr *laddr; size_t sa_len; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (stcb) { if (sctp_is_addr_restricted(stcb, laddr->ifa)) { continue; } } sa_len = laddr->ifa->address.sa.sa_len; if (actual + sa_len > limit) { return (actual); } if (sctp_fill_user_address(addr, &laddr->ifa->address.sa)) continue; switch (laddr->ifa->address.sa.sa_family) { #ifdef INET case AF_INET: ((struct sockaddr_in *)addr)->sin_port = inp->sctp_lport; break; #endif #ifdef INET6 case AF_INET6: ((struct sockaddr_in6 *)addr)->sin6_port = inp->sctp_lport; break; #endif default: /* TSNH */ break; } addr = (struct sockaddr *)((caddr_t)addr + sa_len); actual += sa_len; } } return (actual); } static size_t sctp_fill_up_addresses(struct sctp_inpcb *inp, struct sctp_tcb *stcb, size_t limit, struct sockaddr *addr) { size_t size; SCTP_IPI_ADDR_RLOCK(); /* fill up addresses for the endpoint's default vrf */ size = sctp_fill_up_addresses_vrf(inp, stcb, limit, addr, inp->def_vrf_id); SCTP_IPI_ADDR_RUNLOCK(); return (size); } static size_t sctp_max_size_addresses_vrf(struct sctp_inpcb *inp, uint32_t vrf_id) { struct sctp_vrf *vrf; size_t size; /* * In both sub-set bound an bound_all cases we return the size of * the maximum number of addresses that you could get. In reality * the sub-set bound may have an exclusion list for a given TCB or * in the bound-all case a TCB may NOT include the loopback or other * addresses as well. */ SCTP_IPI_ADDR_LOCK_ASSERT(); vrf = sctp_find_vrf(vrf_id); if (vrf == NULL) { return (0); } size = 0; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { struct sctp_ifn *sctp_ifn; struct sctp_ifa *sctp_ifa; LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { /* Count them if they are the right type */ switch (sctp_ifa->address.sa.sa_family) { #ifdef INET case AF_INET: #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) size += sizeof(struct sockaddr_in6); else size += sizeof(struct sockaddr_in); #else size += sizeof(struct sockaddr_in); #endif break; #endif #ifdef INET6 case AF_INET6: size += sizeof(struct sockaddr_in6); break; #endif default: break; } } } } else { struct sctp_laddr *laddr; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { switch (laddr->ifa->address.sa.sa_family) { #ifdef INET case AF_INET: #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) size += sizeof(struct sockaddr_in6); else size += sizeof(struct sockaddr_in); #else size += sizeof(struct sockaddr_in); #endif break; #endif #ifdef INET6 case AF_INET6: size += sizeof(struct sockaddr_in6); break; #endif default: break; } } } return (size); } static size_t sctp_max_size_addresses(struct sctp_inpcb *inp) { size_t size; SCTP_IPI_ADDR_RLOCK(); /* Maximum size of all addresses for the endpoint's default VRF */ size = sctp_max_size_addresses_vrf(inp, inp->def_vrf_id); SCTP_IPI_ADDR_RUNLOCK(); return (size); } static int sctp_do_connect_x(struct socket *so, struct sctp_inpcb *inp, void *optval, size_t optsize, void *p, int delay) { int error; int creat_lock_on = 0; struct sctp_tcb *stcb = NULL; struct sockaddr *sa; unsigned int num_v6 = 0, num_v4 = 0, *totaddrp, totaddr; uint32_t vrf_id; sctp_assoc_t *a_id; SCTPDBG(SCTP_DEBUG_PCB1, "Connectx called\n"); if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { /* We are already connected AND the TCP model */ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EADDRINUSE); return (EADDRINUSE); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE))) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); SCTP_INP_RUNLOCK(inp); } if (stcb) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); return (EALREADY); } SCTP_INP_INCR_REF(inp); SCTP_ASOC_CREATE_LOCK(inp); creat_lock_on = 1; if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EFAULT); error = EFAULT; goto out_now; } totaddrp = (unsigned int *)optval; totaddr = *totaddrp; sa = (struct sockaddr *)(totaddrp + 1); error = sctp_connectx_helper_find(inp, sa, totaddr, &num_v4, &num_v6, (unsigned int)(optsize - sizeof(int))); if (error != 0) { /* Already have or am bring up an association */ SCTP_ASOC_CREATE_UNLOCK(inp); creat_lock_on = 0; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); goto out_now; } #ifdef INET6 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && (num_v6 > 0)) { error = EINVAL; goto out_now; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && (num_v4 > 0)) { if (SCTP_IPV6_V6ONLY(inp)) { /* * if IPV6_V6ONLY flag, ignore connections destined * to a v4 addr or v4-mapped addr */ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_now; } } #endif /* INET6 */ if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { /* Bind a ephemeral port */ error = sctp_inpcb_bind(so, NULL, NULL, p); if (error) { goto out_now; } } /* FIX ME: do we want to pass in a vrf on the connect call? */ vrf_id = inp->def_vrf_id; /* We are GOOD to go */ stcb = sctp_aloc_assoc_connected(inp, sa, &error, 0, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, inp->sctp_ep.port, (struct thread *)p, SCTP_INITIALIZE_AUTH_PARAMS); if (stcb == NULL) { /* Gak! no memory */ goto out_now; } SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); /* move to second address */ switch (sa->sa_family) { #ifdef INET case AF_INET: sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in)); break; #endif #ifdef INET6 case AF_INET6: sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in6)); break; #endif default: break; } error = 0; sctp_connectx_helper_add(stcb, sa, (totaddr - 1), &error); /* Fill in the return id */ if (error) { goto out_now; } a_id = (sctp_assoc_t *)optval; *a_id = sctp_get_associd(stcb); if (delay) { /* doing delayed connection */ stcb->asoc.delayed_connection = 1; sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, stcb->asoc.primary_destination); } else { (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); } SCTP_TCB_UNLOCK(stcb); out_now: if (creat_lock_on) { SCTP_ASOC_CREATE_UNLOCK(inp); } SCTP_INP_DECR_REF(inp); return (error); } #define SCTP_FIND_STCB(inp, stcb, assoc_id) { \ if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||\ (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { \ SCTP_INP_RLOCK(inp); \ stcb = LIST_FIRST(&inp->sctp_asoc_list); \ if (stcb) { \ SCTP_TCB_LOCK(stcb); \ } \ SCTP_INP_RUNLOCK(inp); \ } else if (assoc_id > SCTP_ALL_ASSOC) { \ stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1); \ if (stcb == NULL) { \ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); \ error = ENOENT; \ break; \ } \ } else { \ stcb = NULL; \ } \ } #define SCTP_CHECK_AND_CAST(destp, srcp, type, size) {\ if (size < sizeof(type)) { \ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); \ error = EINVAL; \ break; \ } else { \ destp = (type *)srcp; \ } \ } static int sctp_getopt(struct socket *so, int optname, void *optval, size_t *optsize, void *p) { struct sctp_inpcb *inp = NULL; int error, val = 0; struct sctp_tcb *stcb = NULL; if (optval == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return EINVAL; } error = 0; switch (optname) { case SCTP_NODELAY: case SCTP_AUTOCLOSE: case SCTP_EXPLICIT_EOR: case SCTP_AUTO_ASCONF: case SCTP_DISABLE_FRAGMENTS: case SCTP_I_WANT_MAPPED_V4_ADDR: case SCTP_USE_EXT_RCVINFO: SCTP_INP_RLOCK(inp); switch (optname) { case SCTP_DISABLE_FRAGMENTS: val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT); break; case SCTP_I_WANT_MAPPED_V4_ADDR: val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4); break; case SCTP_AUTO_ASCONF: if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* only valid for bound all sockets */ val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto flags_out; } break; case SCTP_EXPLICIT_EOR: val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); break; case SCTP_NODELAY: val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY); break; case SCTP_USE_EXT_RCVINFO: val = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO); break; case SCTP_AUTOCLOSE: if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) val = sctp_ticks_to_secs(inp->sctp_ep.auto_close_time); else val = 0; break; default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOPROTOOPT); error = ENOPROTOOPT; } /* end switch (sopt->sopt_name) */ if (*optsize < sizeof(val)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } flags_out: SCTP_INP_RUNLOCK(inp); if (error == 0) { /* return the option value */ *(int *)optval = val; *optsize = sizeof(val); } break; case SCTP_GET_PACKET_LOG: { #ifdef SCTP_PACKET_LOGGING uint8_t *target; int ret; SCTP_CHECK_AND_CAST(target, optval, uint8_t, *optsize); ret = sctp_copy_out_packet_log(target, (int)*optsize); *optsize = ret; #else SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; #endif break; } case SCTP_REUSE_PORT: { uint32_t *value; if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { /* Can't do this for a 1-m socket */ error = EINVAL; break; } SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); *value = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE); *optsize = sizeof(uint32_t); break; } case SCTP_PARTIAL_DELIVERY_POINT: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); *value = inp->partial_delivery_point; *optsize = sizeof(uint32_t); break; } case SCTP_FRAGMENT_INTERLEAVE: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) { if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) { *value = SCTP_FRAG_LEVEL_2; } else { *value = SCTP_FRAG_LEVEL_1; } } else { *value = SCTP_FRAG_LEVEL_0; } *optsize = sizeof(uint32_t); break; } case SCTP_INTERLEAVING_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.idata_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); if (inp->idata_supported) { av->assoc_value = 1; } else { av->assoc_value = 0; } SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_CMT_ON_OFF: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.sctp_cmt_on_off; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_cmt_on_off; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_PLUGGABLE_CC: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.congestion_control_module; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_ep.sctp_default_cc_module; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_CC_OPTION: { struct sctp_cc_option *cc_opt; SCTP_CHECK_AND_CAST(cc_opt, optval, struct sctp_cc_option, *optsize); SCTP_FIND_STCB(inp, stcb, cc_opt->aid_value.assoc_id); if (stcb == NULL) { error = EINVAL; } else { if (stcb->asoc.cc_functions.sctp_cwnd_socket_option == NULL) { error = ENOTSUP; } else { error = (*stcb->asoc.cc_functions.sctp_cwnd_socket_option) (stcb, 0, cc_opt); *optsize = sizeof(struct sctp_cc_option); } SCTP_TCB_UNLOCK(stcb); } break; } case SCTP_PLUGGABLE_SS: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.stream_scheduling_module; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_ep.sctp_default_ss_module; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_SS_VALUE: { struct sctp_stream_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_stream_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { if ((av->stream_id >= stcb->asoc.streamoutcnt) || (stcb->asoc.ss_functions.sctp_ss_get_value(stcb, &stcb->asoc, &stcb->asoc.strmout[av->stream_id], &av->stream_value) < 0)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { *optsize = sizeof(struct sctp_stream_value); } SCTP_TCB_UNLOCK(stcb); } else { /* * Can't get stream value without * association */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } break; } case SCTP_GET_ADDR_LEN: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); error = EINVAL; #ifdef INET if (av->assoc_value == AF_INET) { av->assoc_value = sizeof(struct sockaddr_in); error = 0; } #endif #ifdef INET6 if (av->assoc_value == AF_INET6) { av->assoc_value = sizeof(struct sockaddr_in6); error = 0; } #endif if (error) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } else { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_GET_ASSOC_NUMBER: { uint32_t *value, cnt; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { /* Can't do this for a 1-1 socket */ error = EINVAL; SCTP_INP_RUNLOCK(inp); break; } cnt = 0; LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { cnt++; } SCTP_INP_RUNLOCK(inp); *value = cnt; *optsize = sizeof(uint32_t); break; } case SCTP_GET_ASSOC_ID_LIST: { struct sctp_assoc_ids *ids; uint32_t at; size_t limit; SCTP_CHECK_AND_CAST(ids, optval, struct sctp_assoc_ids, *optsize); SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { /* Can't do this for a 1-1 socket */ error = EINVAL; SCTP_INP_RUNLOCK(inp); break; } at = 0; limit = (*optsize - sizeof(uint32_t)) / sizeof(sctp_assoc_t); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { if (at < limit) { ids->gaids_assoc_id[at++] = sctp_get_associd(stcb); if (at == 0) { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } SCTP_INP_RUNLOCK(inp); if (error == 0) { ids->gaids_number_of_ids = at; *optsize = ((at * sizeof(sctp_assoc_t)) + sizeof(uint32_t)); } break; } case SCTP_CONTEXT: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.context; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_context; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_VRF_ID: { uint32_t *default_vrfid; SCTP_CHECK_AND_CAST(default_vrfid, optval, uint32_t, *optsize); *default_vrfid = inp->def_vrf_id; *optsize = sizeof(uint32_t); break; } case SCTP_GET_ASOC_VRF: { struct sctp_assoc_value *id; SCTP_CHECK_AND_CAST(id, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, id->assoc_id); if (stcb == NULL) { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } else { id->assoc_value = stcb->asoc.vrf_id; SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_GET_VRF_IDS: { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; break; } case SCTP_GET_NONCE_VALUES: { struct sctp_get_nonce_values *gnv; SCTP_CHECK_AND_CAST(gnv, optval, struct sctp_get_nonce_values, *optsize); SCTP_FIND_STCB(inp, stcb, gnv->gn_assoc_id); if (stcb) { gnv->gn_peers_tag = stcb->asoc.peer_vtag; gnv->gn_local_tag = stcb->asoc.my_vtag; SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_get_nonce_values); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTCONN); error = ENOTCONN; } break; } case SCTP_DELAYED_SACK: { struct sctp_sack_info *sack; SCTP_CHECK_AND_CAST(sack, optval, struct sctp_sack_info, *optsize); SCTP_FIND_STCB(inp, stcb, sack->sack_assoc_id); if (stcb) { sack->sack_delay = stcb->asoc.delayed_ack; sack->sack_freq = stcb->asoc.sack_freq; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (sack->sack_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); sack->sack_delay = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]); sack->sack_freq = inp->sctp_ep.sctp_sack_freq; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_sack_info); } break; } case SCTP_GET_SNDBUF_USE: { struct sctp_sockstat *ss; SCTP_CHECK_AND_CAST(ss, optval, struct sctp_sockstat, *optsize); SCTP_FIND_STCB(inp, stcb, ss->ss_assoc_id); if (stcb) { ss->ss_total_sndbuf = stcb->asoc.total_output_queue_size; ss->ss_total_recv_buf = (stcb->asoc.size_on_reasm_queue + stcb->asoc.size_on_all_streams); SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_sockstat); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTCONN); error = ENOTCONN; } break; } case SCTP_MAX_BURST: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.max_burst; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_ep.max_burst; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_MAXSEG: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.sctp_frag_point; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->sctp_frag_point; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_GET_STAT_LOG: error = sctp_fill_stat_log(optval, optsize); break; case SCTP_EVENTS: { struct sctp_event_subscribe *events; SCTP_CHECK_AND_CAST(events, optval, struct sctp_event_subscribe, *optsize); memset(events, 0, sizeof(struct sctp_event_subscribe)); SCTP_INP_RLOCK(inp); if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT)) events->sctp_data_io_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVASSOCEVNT)) events->sctp_association_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVPADDREVNT)) events->sctp_address_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVSENDFAILEVNT)) events->sctp_send_failure_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVPEERERR)) events->sctp_peer_error_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) events->sctp_shutdown_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) events->sctp_partial_delivery_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) events->sctp_adaptation_layer_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTHEVNT)) events->sctp_authentication_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DRYEVNT)) events->sctp_sender_dry_event = 1; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_STREAM_RESETEVNT)) events->sctp_stream_reset_event = 1; SCTP_INP_RUNLOCK(inp); *optsize = sizeof(struct sctp_event_subscribe); break; } case SCTP_ADAPTATION_LAYER: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); SCTP_INP_RLOCK(inp); *value = inp->sctp_ep.adaptation_layer_indicator; SCTP_INP_RUNLOCK(inp); *optsize = sizeof(uint32_t); break; } case SCTP_SET_INITIAL_DBG_SEQ: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); SCTP_INP_RLOCK(inp); *value = inp->sctp_ep.initial_sequence_debug; SCTP_INP_RUNLOCK(inp); *optsize = sizeof(uint32_t); break; } case SCTP_GET_LOCAL_ADDR_SIZE: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); SCTP_INP_RLOCK(inp); *value = (uint32_t)sctp_max_size_addresses(inp); SCTP_INP_RUNLOCK(inp); *optsize = sizeof(uint32_t); break; } case SCTP_GET_REMOTE_ADDR_SIZE: { uint32_t *value; struct sctp_nets *net; size_t size; SCTP_CHECK_AND_CAST(value, optval, uint32_t, *optsize); /* FIXME MT: change to sctp_assoc_value? */ SCTP_FIND_STCB(inp, stcb, (sctp_assoc_t)*value); if (stcb != NULL) { size = 0; /* Count the sizes */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { switch (net->ro._l_addr.sa.sa_family) { #ifdef INET case AF_INET: #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { size += sizeof(struct sockaddr_in6); } else { size += sizeof(struct sockaddr_in); } #else size += sizeof(struct sockaddr_in); #endif break; #endif #ifdef INET6 case AF_INET6: size += sizeof(struct sockaddr_in6); break; #endif default: break; } } SCTP_TCB_UNLOCK(stcb); *value = (uint32_t)size; *optsize = sizeof(uint32_t); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((sctp_assoc_t)*value <= SCTP_ALL_ASSOC)) { error = EINVAL; } else { error = ENOENT; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } break; } case SCTP_GET_PEER_ADDRESSES: /* * Get the address information, an array is passed in to * fill up we pack it. */ { size_t cpsz, left; struct sockaddr *addr; struct sctp_nets *net; struct sctp_getaddresses *saddr; SCTP_CHECK_AND_CAST(saddr, optval, struct sctp_getaddresses, *optsize); SCTP_FIND_STCB(inp, stcb, saddr->sget_assoc_id); if (stcb != NULL) { left = *optsize - offsetof(struct sctp_getaddresses, addr); *optsize = offsetof(struct sctp_getaddresses, addr); addr = &saddr->addr[0].sa; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { switch (net->ro._l_addr.sa.sa_family) { #ifdef INET case AF_INET: #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { cpsz = sizeof(struct sockaddr_in6); } else { cpsz = sizeof(struct sockaddr_in); } #else cpsz = sizeof(struct sockaddr_in); #endif break; #endif #ifdef INET6 case AF_INET6: cpsz = sizeof(struct sockaddr_in6); break; #endif default: cpsz = 0; break; } if (cpsz == 0) { break; } if (left < cpsz) { /* not enough room. */ break; } #if defined(INET) && defined(INET6) if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) && (net->ro._l_addr.sa.sa_family == AF_INET)) { /* Must map the address */ in6_sin_2_v4mapsin6(&net->ro._l_addr.sin, (struct sockaddr_in6 *)addr); } else { memcpy(addr, &net->ro._l_addr, cpsz); } #else memcpy(addr, &net->ro._l_addr, cpsz); #endif ((struct sockaddr_in *)addr)->sin_port = stcb->rport; addr = (struct sockaddr *)((caddr_t)addr + cpsz); left -= cpsz; *optsize += cpsz; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (saddr->sget_assoc_id <= SCTP_ALL_ASSOC)) { error = EINVAL; } else { error = ENOENT; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } break; } case SCTP_GET_LOCAL_ADDRESSES: { size_t limit, actual; struct sctp_getaddresses *saddr; SCTP_CHECK_AND_CAST(saddr, optval, struct sctp_getaddresses, *optsize); SCTP_FIND_STCB(inp, stcb, saddr->sget_assoc_id); if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((saddr->sget_assoc_id == SCTP_CURRENT_ASSOC) || (saddr->sget_assoc_id == SCTP_ALL_ASSOC))) { error = EINVAL; } else { limit = *optsize - offsetof(struct sctp_getaddresses, addr); actual = sctp_fill_up_addresses(inp, stcb, limit, &saddr->addr[0].sa); *optsize = offsetof(struct sctp_getaddresses, addr) + actual; } if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } break; } case SCTP_PEER_ADDR_PARAMS: { struct sctp_paddrparams *paddrp; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(paddrp, optval, struct sctp_paddrparams, *optsize); SCTP_FIND_STCB(inp, stcb, paddrp->spp_assoc_id); #if defined(INET) && defined(INET6) if (paddrp->spp_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&paddrp->spp_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&paddrp->spp_address; } } else { addr = (struct sockaddr *)&paddrp->spp_address; } #else addr = (struct sockaddr *)&paddrp->spp_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } if (stcb != NULL) { /* Applies to the specific association */ paddrp->spp_flags = 0; if (net != NULL) { paddrp->spp_hbinterval = net->heart_beat_delay; paddrp->spp_pathmaxrxt = net->failure_threshold; paddrp->spp_pathmtu = net->mtu; switch (net->ro._l_addr.sa.sa_family) { #ifdef INET case AF_INET: paddrp->spp_pathmtu -= SCTP_MIN_V4_OVERHEAD; break; #endif #ifdef INET6 case AF_INET6: paddrp->spp_pathmtu -= SCTP_MIN_OVERHEAD; break; #endif default: break; } /* get flags for HB */ if (net->dest_state & SCTP_ADDR_NOHB) { paddrp->spp_flags |= SPP_HB_DISABLE; } else { paddrp->spp_flags |= SPP_HB_ENABLE; } /* get flags for PMTU */ if (net->dest_state & SCTP_ADDR_NO_PMTUD) { paddrp->spp_flags |= SPP_PMTUD_DISABLE; } else { paddrp->spp_flags |= SPP_PMTUD_ENABLE; } if (net->dscp & 0x01) { paddrp->spp_dscp = net->dscp & 0xfc; paddrp->spp_flags |= SPP_DSCP; } #ifdef INET6 if ((net->ro._l_addr.sa.sa_family == AF_INET6) && (net->flowlabel & 0x80000000)) { paddrp->spp_ipv6_flowlabel = net->flowlabel & 0x000fffff; paddrp->spp_flags |= SPP_IPV6_FLOWLABEL; } #endif } else { /* * No destination so return default * value */ paddrp->spp_pathmaxrxt = stcb->asoc.def_net_failure; paddrp->spp_pathmtu = stcb->asoc.default_mtu; if (stcb->asoc.default_dscp & 0x01) { paddrp->spp_dscp = stcb->asoc.default_dscp & 0xfc; paddrp->spp_flags |= SPP_DSCP; } #ifdef INET6 if (stcb->asoc.default_flowlabel & 0x80000000) { paddrp->spp_ipv6_flowlabel = stcb->asoc.default_flowlabel & 0x000fffff; paddrp->spp_flags |= SPP_IPV6_FLOWLABEL; } #endif /* default settings should be these */ if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { paddrp->spp_flags |= SPP_HB_DISABLE; } else { paddrp->spp_flags |= SPP_HB_ENABLE; } if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { paddrp->spp_flags |= SPP_PMTUD_DISABLE; } else { paddrp->spp_flags |= SPP_PMTUD_ENABLE; } paddrp->spp_hbinterval = stcb->asoc.heart_beat_delay; } paddrp->spp_assoc_id = sctp_get_associd(stcb); SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (paddrp->spp_assoc_id == SCTP_FUTURE_ASSOC))) { /* Use endpoint defaults */ SCTP_INP_RLOCK(inp); paddrp->spp_pathmaxrxt = inp->sctp_ep.def_net_failure; paddrp->spp_hbinterval = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]); paddrp->spp_assoc_id = SCTP_FUTURE_ASSOC; /* get inp's default */ if (inp->sctp_ep.default_dscp & 0x01) { paddrp->spp_dscp = inp->sctp_ep.default_dscp & 0xfc; paddrp->spp_flags |= SPP_DSCP; } #ifdef INET6 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && (inp->sctp_ep.default_flowlabel & 0x80000000)) { paddrp->spp_ipv6_flowlabel = inp->sctp_ep.default_flowlabel & 0x000fffff; paddrp->spp_flags |= SPP_IPV6_FLOWLABEL; } #endif paddrp->spp_pathmtu = inp->sctp_ep.default_mtu; if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { paddrp->spp_flags |= SPP_HB_ENABLE; } else { paddrp->spp_flags |= SPP_HB_DISABLE; } if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { paddrp->spp_flags |= SPP_PMTUD_ENABLE; } else { paddrp->spp_flags |= SPP_PMTUD_DISABLE; } SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_paddrparams); } break; } case SCTP_GET_PEER_ADDR_INFO: { struct sctp_paddrinfo *paddri; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(paddri, optval, struct sctp_paddrinfo, *optsize); SCTP_FIND_STCB(inp, stcb, paddri->spinfo_assoc_id); #if defined(INET) && defined(INET6) if (paddri->spinfo_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&paddri->spinfo_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&paddri->spinfo_address; } } else { addr = (struct sockaddr *)&paddri->spinfo_address; } #else addr = (struct sockaddr *)&paddri->spinfo_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net != NULL)) { if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { /* It's unconfirmed */ paddri->spinfo_state = SCTP_UNCONFIRMED; } else if (net->dest_state & SCTP_ADDR_REACHABLE) { /* It's active */ paddri->spinfo_state = SCTP_ACTIVE; } else { /* It's inactive */ paddri->spinfo_state = SCTP_INACTIVE; } paddri->spinfo_cwnd = net->cwnd; paddri->spinfo_srtt = net->lastsa >> SCTP_RTT_SHIFT; paddri->spinfo_rto = net->RTO; paddri->spinfo_assoc_id = sctp_get_associd(stcb); paddri->spinfo_mtu = net->mtu; switch (addr->sa_family) { #if defined(INET) case AF_INET: paddri->spinfo_mtu -= SCTP_MIN_V4_OVERHEAD; break; #endif #if defined(INET6) case AF_INET6: paddri->spinfo_mtu -= SCTP_MIN_OVERHEAD; break; #endif default: break; } SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_paddrinfo); } else { if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; } break; } case SCTP_PCB_STATUS: { struct sctp_pcbinfo *spcb; SCTP_CHECK_AND_CAST(spcb, optval, struct sctp_pcbinfo, *optsize); sctp_fill_pcbinfo(spcb); *optsize = sizeof(struct sctp_pcbinfo); break; } case SCTP_STATUS: { struct sctp_nets *net; struct sctp_status *sstat; SCTP_CHECK_AND_CAST(sstat, optval, struct sctp_status, *optsize); SCTP_FIND_STCB(inp, stcb, sstat->sstat_assoc_id); if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } sstat->sstat_state = sctp_map_assoc_state(stcb->asoc.state); sstat->sstat_assoc_id = sctp_get_associd(stcb); sstat->sstat_rwnd = stcb->asoc.peers_rwnd; sstat->sstat_unackdata = stcb->asoc.sent_queue_cnt; /* * We can't include chunks that have been passed to * the socket layer. Only things in queue. */ sstat->sstat_penddata = (stcb->asoc.cnt_on_reasm_queue + stcb->asoc.cnt_on_all_streams); sstat->sstat_instrms = stcb->asoc.streamincnt; sstat->sstat_outstrms = stcb->asoc.streamoutcnt; sstat->sstat_fragmentation_point = sctp_get_frag_point(stcb); net = stcb->asoc.primary_destination; if (net != NULL) { memcpy(&sstat->sstat_primary.spinfo_address, &net->ro._l_addr, ((struct sockaddr *)(&net->ro._l_addr))->sa_len); ((struct sockaddr_in *)&sstat->sstat_primary.spinfo_address)->sin_port = stcb->rport; /* * Again the user can get info from * sctp_constants.h for what the state of * the network is. */ if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { /* It's unconfirmed */ sstat->sstat_primary.spinfo_state = SCTP_UNCONFIRMED; } else if (net->dest_state & SCTP_ADDR_REACHABLE) { /* It's active */ sstat->sstat_primary.spinfo_state = SCTP_ACTIVE; } else { /* It's inactive */ sstat->sstat_primary.spinfo_state = SCTP_INACTIVE; } sstat->sstat_primary.spinfo_cwnd = net->cwnd; sstat->sstat_primary.spinfo_srtt = net->lastsa >> SCTP_RTT_SHIFT; sstat->sstat_primary.spinfo_rto = net->RTO; sstat->sstat_primary.spinfo_mtu = net->mtu; switch (stcb->asoc.primary_destination->ro._l_addr.sa.sa_family) { #if defined(INET) case AF_INET: sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_V4_OVERHEAD; break; #endif #if defined(INET6) case AF_INET6: sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_OVERHEAD; break; #endif default: break; } } else { memset(&sstat->sstat_primary, 0, sizeof(struct sctp_paddrinfo)); } sstat->sstat_primary.spinfo_assoc_id = sctp_get_associd(stcb); SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_status); break; } case SCTP_RTOINFO: { struct sctp_rtoinfo *srto; SCTP_CHECK_AND_CAST(srto, optval, struct sctp_rtoinfo, *optsize); SCTP_FIND_STCB(inp, stcb, srto->srto_assoc_id); if (stcb) { srto->srto_initial = stcb->asoc.initial_rto; srto->srto_max = stcb->asoc.maxrto; srto->srto_min = stcb->asoc.minrto; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (srto->srto_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); srto->srto_initial = inp->sctp_ep.initial_rto; srto->srto_max = inp->sctp_ep.sctp_maxrto; srto->srto_min = inp->sctp_ep.sctp_minrto; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_rtoinfo); } break; } case SCTP_TIMEOUTS: { struct sctp_timeouts *stimo; SCTP_CHECK_AND_CAST(stimo, optval, struct sctp_timeouts, *optsize); SCTP_FIND_STCB(inp, stcb, stimo->stimo_assoc_id); if (stcb) { stimo->stimo_init = stcb->asoc.timoinit; stimo->stimo_data = stcb->asoc.timodata; stimo->stimo_sack = stcb->asoc.timosack; stimo->stimo_shutdown = stcb->asoc.timoshutdown; stimo->stimo_heartbeat = stcb->asoc.timoheartbeat; stimo->stimo_cookie = stcb->asoc.timocookie; stimo->stimo_shutdownack = stcb->asoc.timoshutdownack; SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_timeouts); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } break; } case SCTP_ASSOCINFO: { struct sctp_assocparams *sasoc; SCTP_CHECK_AND_CAST(sasoc, optval, struct sctp_assocparams, *optsize); SCTP_FIND_STCB(inp, stcb, sasoc->sasoc_assoc_id); if (stcb) { sasoc->sasoc_cookie_life = sctp_ticks_to_msecs(stcb->asoc.cookie_life); sasoc->sasoc_asocmaxrxt = stcb->asoc.max_send_times; sasoc->sasoc_number_peer_destinations = stcb->asoc.numnets; sasoc->sasoc_peer_rwnd = stcb->asoc.peers_rwnd; sasoc->sasoc_local_rwnd = stcb->asoc.my_rwnd; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (sasoc->sasoc_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); sasoc->sasoc_cookie_life = sctp_ticks_to_msecs(inp->sctp_ep.def_cookie_life); sasoc->sasoc_asocmaxrxt = inp->sctp_ep.max_send_times; sasoc->sasoc_number_peer_destinations = 0; sasoc->sasoc_peer_rwnd = 0; sasoc->sasoc_local_rwnd = (uint32_t)sbspace(&inp->sctp_socket->so_rcv); SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assocparams); } break; } case SCTP_DEFAULT_SEND_PARAM: { struct sctp_sndrcvinfo *s_info; SCTP_CHECK_AND_CAST(s_info, optval, struct sctp_sndrcvinfo, *optsize); SCTP_FIND_STCB(inp, stcb, s_info->sinfo_assoc_id); if (stcb) { memcpy(s_info, &stcb->asoc.def_send, sizeof(stcb->asoc.def_send)); SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (s_info->sinfo_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); memcpy(s_info, &inp->def_send, sizeof(inp->def_send)); SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_sndrcvinfo); } break; } case SCTP_INITMSG: { struct sctp_initmsg *sinit; SCTP_CHECK_AND_CAST(sinit, optval, struct sctp_initmsg, *optsize); SCTP_INP_RLOCK(inp); sinit->sinit_num_ostreams = inp->sctp_ep.pre_open_stream_count; sinit->sinit_max_instreams = inp->sctp_ep.max_open_streams_intome; sinit->sinit_max_attempts = inp->sctp_ep.max_init_times; sinit->sinit_max_init_timeo = inp->sctp_ep.initial_init_rto_max; SCTP_INP_RUNLOCK(inp); *optsize = sizeof(struct sctp_initmsg); break; } case SCTP_PRIMARY_ADDR: /* we allow a "get" operation on this */ { struct sctp_setprim *ssp; SCTP_CHECK_AND_CAST(ssp, optval, struct sctp_setprim, *optsize); SCTP_FIND_STCB(inp, stcb, ssp->ssp_assoc_id); if (stcb) { union sctp_sockstore *addr; addr = &stcb->asoc.primary_destination->ro._l_addr; switch (addr->sa.sa_family) { #ifdef INET case AF_INET: #ifdef INET6 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { in6_sin_2_v4mapsin6(&addr->sin, (struct sockaddr_in6 *)&ssp->ssp_addr); } else { memcpy(&ssp->ssp_addr, &addr->sin, sizeof(struct sockaddr_in)); } #else memcpy(&ssp->ssp_addr, &addr->sin, sizeof(struct sockaddr_in)); #endif break; #endif #ifdef INET6 case AF_INET6: memcpy(&ssp->ssp_addr, &addr->sin6, sizeof(struct sockaddr_in6)); break; #endif default: break; } SCTP_TCB_UNLOCK(stcb); *optsize = sizeof(struct sctp_setprim); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } break; } case SCTP_HMAC_IDENT: { struct sctp_hmacalgo *shmac; sctp_hmaclist_t *hmaclist; size_t size; int i; SCTP_CHECK_AND_CAST(shmac, optval, struct sctp_hmacalgo, *optsize); SCTP_INP_RLOCK(inp); hmaclist = inp->sctp_ep.local_hmacs; if (hmaclist == NULL) { /* no HMACs to return */ *optsize = sizeof(*shmac); SCTP_INP_RUNLOCK(inp); break; } /* is there room for all of the hmac ids? */ size = sizeof(*shmac) + (hmaclist->num_algo * sizeof(shmac->shmac_idents[0])); if (*optsize < size) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_INP_RUNLOCK(inp); break; } /* copy in the list */ shmac->shmac_number_of_idents = hmaclist->num_algo; for (i = 0; i < hmaclist->num_algo; i++) { shmac->shmac_idents[i] = hmaclist->hmac[i]; } SCTP_INP_RUNLOCK(inp); *optsize = size; break; } case SCTP_AUTH_ACTIVE_KEY: { struct sctp_authkeyid *scact; SCTP_CHECK_AND_CAST(scact, optval, struct sctp_authkeyid, *optsize); SCTP_FIND_STCB(inp, stcb, scact->scact_assoc_id); if (stcb) { /* get the active key on the assoc */ scact->scact_keynumber = stcb->asoc.authinfo.active_keyid; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (scact->scact_assoc_id == SCTP_FUTURE_ASSOC))) { /* get the endpoint active key */ SCTP_INP_RLOCK(inp); scact->scact_keynumber = inp->sctp_ep.default_keyid; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_authkeyid); } break; } case SCTP_LOCAL_AUTH_CHUNKS: { struct sctp_authchunks *sac; sctp_auth_chklist_t *chklist = NULL; size_t size = 0; SCTP_CHECK_AND_CAST(sac, optval, struct sctp_authchunks, *optsize); SCTP_FIND_STCB(inp, stcb, sac->gauth_assoc_id); if (stcb) { /* get off the assoc */ chklist = stcb->asoc.local_auth_chunks; /* is there enough space? */ size = sctp_auth_get_chklist_size(chklist); if (*optsize < (sizeof(struct sctp_authchunks) + size)) { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } else { /* copy in the chunks */ (void)sctp_serialize_auth_chunks(chklist, sac->gauth_chunks); sac->gauth_number_of_chunks = (uint32_t)size; *optsize = sizeof(struct sctp_authchunks) + size; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (sac->gauth_assoc_id == SCTP_FUTURE_ASSOC))) { /* get off the endpoint */ SCTP_INP_RLOCK(inp); chklist = inp->sctp_ep.local_auth_chunks; /* is there enough space? */ size = sctp_auth_get_chklist_size(chklist); if (*optsize < (sizeof(struct sctp_authchunks) + size)) { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } else { /* copy in the chunks */ (void)sctp_serialize_auth_chunks(chklist, sac->gauth_chunks); sac->gauth_number_of_chunks = (uint32_t)size; *optsize = sizeof(struct sctp_authchunks) + size; } SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_PEER_AUTH_CHUNKS: { struct sctp_authchunks *sac; sctp_auth_chklist_t *chklist = NULL; size_t size = 0; SCTP_CHECK_AND_CAST(sac, optval, struct sctp_authchunks, *optsize); SCTP_FIND_STCB(inp, stcb, sac->gauth_assoc_id); if (stcb) { /* get off the assoc */ chklist = stcb->asoc.peer_auth_chunks; /* is there enough space? */ size = sctp_auth_get_chklist_size(chklist); if (*optsize < (sizeof(struct sctp_authchunks) + size)) { error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); } else { /* copy in the chunks */ (void)sctp_serialize_auth_chunks(chklist, sac->gauth_chunks); sac->gauth_number_of_chunks = (uint32_t)size; *optsize = sizeof(struct sctp_authchunks) + size; } SCTP_TCB_UNLOCK(stcb); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; } break; } case SCTP_EVENT: { struct sctp_event *event; uint32_t event_type; SCTP_CHECK_AND_CAST(event, optval, struct sctp_event, *optsize); SCTP_FIND_STCB(inp, stcb, event->se_assoc_id); switch (event->se_type) { case SCTP_ASSOC_CHANGE: event_type = SCTP_PCB_FLAGS_RECVASSOCEVNT; break; case SCTP_PEER_ADDR_CHANGE: event_type = SCTP_PCB_FLAGS_RECVPADDREVNT; break; case SCTP_REMOTE_ERROR: event_type = SCTP_PCB_FLAGS_RECVPEERERR; break; case SCTP_SEND_FAILED: event_type = SCTP_PCB_FLAGS_RECVSENDFAILEVNT; break; case SCTP_SHUTDOWN_EVENT: event_type = SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT; break; case SCTP_ADAPTATION_INDICATION: event_type = SCTP_PCB_FLAGS_ADAPTATIONEVNT; break; case SCTP_PARTIAL_DELIVERY_EVENT: event_type = SCTP_PCB_FLAGS_PDAPIEVNT; break; case SCTP_AUTHENTICATION_EVENT: event_type = SCTP_PCB_FLAGS_AUTHEVNT; break; case SCTP_STREAM_RESET_EVENT: event_type = SCTP_PCB_FLAGS_STREAM_RESETEVNT; break; case SCTP_SENDER_DRY_EVENT: event_type = SCTP_PCB_FLAGS_DRYEVNT; break; case SCTP_NOTIFICATIONS_STOPPED_EVENT: event_type = 0; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTSUP); error = ENOTSUP; break; case SCTP_ASSOC_RESET_EVENT: event_type = SCTP_PCB_FLAGS_ASSOC_RESETEVNT; break; case SCTP_STREAM_CHANGE_EVENT: event_type = SCTP_PCB_FLAGS_STREAM_CHANGEEVNT; break; case SCTP_SEND_FAILED_EVENT: event_type = SCTP_PCB_FLAGS_RECVNSENDFAILEVNT; break; default: event_type = 0; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (event_type > 0) { if (stcb) { event->se_on = sctp_stcb_is_feature_on(inp, stcb, event_type); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (event->se_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); event->se_on = sctp_is_feature_on(inp, event_type); SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } } if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } if (error == 0) { *optsize = sizeof(struct sctp_event); } break; } case SCTP_RECVRCVINFO: if (*optsize < sizeof(int)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { SCTP_INP_RLOCK(inp); *(int *)optval = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVRCVINFO); SCTP_INP_RUNLOCK(inp); *optsize = sizeof(int); } break; case SCTP_RECVNXTINFO: if (*optsize < sizeof(int)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { SCTP_INP_RLOCK(inp); *(int *)optval = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO); SCTP_INP_RUNLOCK(inp); *optsize = sizeof(int); } break; case SCTP_DEFAULT_SNDINFO: { struct sctp_sndinfo *info; SCTP_CHECK_AND_CAST(info, optval, struct sctp_sndinfo, *optsize); SCTP_FIND_STCB(inp, stcb, info->snd_assoc_id); if (stcb) { info->snd_sid = stcb->asoc.def_send.sinfo_stream; info->snd_flags = stcb->asoc.def_send.sinfo_flags; info->snd_flags &= 0xfff0; info->snd_ppid = stcb->asoc.def_send.sinfo_ppid; info->snd_context = stcb->asoc.def_send.sinfo_context; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (info->snd_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); info->snd_sid = inp->def_send.sinfo_stream; info->snd_flags = inp->def_send.sinfo_flags; info->snd_flags &= 0xfff0; info->snd_ppid = inp->def_send.sinfo_ppid; info->snd_context = inp->def_send.sinfo_context; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_sndinfo); } break; } case SCTP_DEFAULT_PRINFO: { struct sctp_default_prinfo *info; SCTP_CHECK_AND_CAST(info, optval, struct sctp_default_prinfo, *optsize); SCTP_FIND_STCB(inp, stcb, info->pr_assoc_id); if (stcb) { info->pr_policy = PR_SCTP_POLICY(stcb->asoc.def_send.sinfo_flags); info->pr_value = stcb->asoc.def_send.sinfo_timetolive; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (info->pr_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); info->pr_policy = PR_SCTP_POLICY(inp->def_send.sinfo_flags); info->pr_value = inp->def_send.sinfo_timetolive; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_default_prinfo); } break; } case SCTP_PEER_ADDR_THLDS: { struct sctp_paddrthlds *thlds; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(thlds, optval, struct sctp_paddrthlds, *optsize); SCTP_FIND_STCB(inp, stcb, thlds->spt_assoc_id); #if defined(INET) && defined(INET6) if (thlds->spt_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&thlds->spt_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&thlds->spt_address; } } else { addr = (struct sockaddr *)&thlds->spt_address; } #else addr = (struct sockaddr *)&thlds->spt_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } if (stcb != NULL) { if (net != NULL) { thlds->spt_pathmaxrxt = net->failure_threshold; thlds->spt_pathpfthld = net->pf_threshold; thlds->spt_pathcpthld = 0xffff; } else { thlds->spt_pathmaxrxt = stcb->asoc.def_net_failure; thlds->spt_pathpfthld = stcb->asoc.def_net_pf_threshold; thlds->spt_pathcpthld = 0xffff; } thlds->spt_assoc_id = sctp_get_associd(stcb); SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (thlds->spt_assoc_id == SCTP_FUTURE_ASSOC))) { /* Use endpoint defaults */ SCTP_INP_RLOCK(inp); thlds->spt_pathmaxrxt = inp->sctp_ep.def_net_failure; thlds->spt_pathpfthld = inp->sctp_ep.def_net_pf_threshold; thlds->spt_pathcpthld = 0xffff; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_paddrthlds); } break; } case SCTP_REMOTE_UDP_ENCAPS_PORT: { struct sctp_udpencaps *encaps; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(encaps, optval, struct sctp_udpencaps, *optsize); SCTP_FIND_STCB(inp, stcb, encaps->sue_assoc_id); #if defined(INET) && defined(INET6) if (encaps->sue_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&encaps->sue_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&encaps->sue_address; } } else { addr = (struct sockaddr *)&encaps->sue_address; } #else addr = (struct sockaddr *)&encaps->sue_address; #endif if (stcb) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } if (stcb != NULL) { if (net) { encaps->sue_port = net->port; } else { encaps->sue_port = stcb->asoc.port; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (encaps->sue_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); encaps->sue_port = inp->sctp_ep.port; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_udpencaps); } break; } case SCTP_ECN_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.ecn_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->ecn_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_PR_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.prsctp_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->prsctp_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_AUTH_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.auth_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->auth_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_ASCONF_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.asconf_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->asconf_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_RECONFIG_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.reconfig_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->reconfig_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_NRSACK_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.nrsack_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->nrsack_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_PKTDROP_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.pktdrop_supported; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->pktdrop_supported; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_ENABLE_STREAM_RESET: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = (uint32_t)stcb->asoc.local_strreset_support; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = (uint32_t)inp->local_strreset_support; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } case SCTP_PR_STREAM_STATUS: { struct sctp_prstatus *sprstat; uint16_t sid; uint16_t policy; SCTP_CHECK_AND_CAST(sprstat, optval, struct sctp_prstatus, *optsize); SCTP_FIND_STCB(inp, stcb, sprstat->sprstat_assoc_id); sid = sprstat->sprstat_sid; policy = sprstat->sprstat_policy; #if defined(SCTP_DETAILED_STR_STATS) if ((stcb != NULL) && (sid < stcb->asoc.streamoutcnt) && (policy != SCTP_PR_SCTP_NONE) && ((policy <= SCTP_PR_SCTP_MAX) || (policy == SCTP_PR_SCTP_ALL))) { if (policy == SCTP_PR_SCTP_ALL) { sprstat->sprstat_abandoned_unsent = stcb->asoc.strmout[sid].abandoned_unsent[0]; sprstat->sprstat_abandoned_sent = stcb->asoc.strmout[sid].abandoned_sent[0]; } else { sprstat->sprstat_abandoned_unsent = stcb->asoc.strmout[sid].abandoned_unsent[policy]; sprstat->sprstat_abandoned_sent = stcb->asoc.strmout[sid].abandoned_sent[policy]; } #else if ((stcb != NULL) && (sid < stcb->asoc.streamoutcnt) && (policy == SCTP_PR_SCTP_ALL)) { sprstat->sprstat_abandoned_unsent = stcb->asoc.strmout[sid].abandoned_unsent[0]; sprstat->sprstat_abandoned_sent = stcb->asoc.strmout[sid].abandoned_sent[0]; #endif } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } if (error == 0) { *optsize = sizeof(struct sctp_prstatus); } break; } case SCTP_PR_ASSOC_STATUS: { struct sctp_prstatus *sprstat; uint16_t policy; SCTP_CHECK_AND_CAST(sprstat, optval, struct sctp_prstatus, *optsize); SCTP_FIND_STCB(inp, stcb, sprstat->sprstat_assoc_id); policy = sprstat->sprstat_policy; if ((stcb != NULL) && (policy != SCTP_PR_SCTP_NONE) && ((policy <= SCTP_PR_SCTP_MAX) || (policy == SCTP_PR_SCTP_ALL))) { if (policy == SCTP_PR_SCTP_ALL) { sprstat->sprstat_abandoned_unsent = stcb->asoc.abandoned_unsent[0]; sprstat->sprstat_abandoned_sent = stcb->asoc.abandoned_sent[0]; } else { sprstat->sprstat_abandoned_unsent = stcb->asoc.abandoned_unsent[policy]; sprstat->sprstat_abandoned_sent = stcb->asoc.abandoned_sent[policy]; } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } if (error == 0) { *optsize = sizeof(struct sctp_prstatus); } break; } case SCTP_MAX_CWND: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { av->assoc_value = stcb->asoc.max_cwnd; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_RLOCK(inp); av->assoc_value = inp->max_cwnd; SCTP_INP_RUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } if (error == 0) { *optsize = sizeof(struct sctp_assoc_value); } break; } default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOPROTOOPT); error = ENOPROTOOPT; break; } /* end switch (sopt->sopt_name) */ if (error) { *optsize = 0; } return (error); } static int sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize, void *p) { int error, set_opt; uint32_t *mopt; struct sctp_tcb *stcb = NULL; struct sctp_inpcb *inp = NULL; uint32_t vrf_id; if (optval == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } vrf_id = inp->def_vrf_id; error = 0; switch (optname) { case SCTP_NODELAY: case SCTP_AUTOCLOSE: case SCTP_AUTO_ASCONF: case SCTP_EXPLICIT_EOR: case SCTP_DISABLE_FRAGMENTS: case SCTP_USE_EXT_RCVINFO: case SCTP_I_WANT_MAPPED_V4_ADDR: /* copy in the option value */ SCTP_CHECK_AND_CAST(mopt, optval, uint32_t, optsize); set_opt = 0; if (error) break; switch (optname) { case SCTP_DISABLE_FRAGMENTS: set_opt = SCTP_PCB_FLAGS_NO_FRAGMENT; break; case SCTP_AUTO_ASCONF: /* * NOTE: we don't really support this flag */ if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* only valid for bound all sockets */ if ((SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) && (*mopt != 0)) { /* forbidden by admin */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EPERM); return (EPERM); } set_opt = SCTP_PCB_FLAGS_AUTO_ASCONF; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } break; case SCTP_EXPLICIT_EOR: set_opt = SCTP_PCB_FLAGS_EXPLICIT_EOR; break; case SCTP_USE_EXT_RCVINFO: set_opt = SCTP_PCB_FLAGS_EXT_RCVINFO; break; case SCTP_I_WANT_MAPPED_V4_ADDR: if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { set_opt = SCTP_PCB_FLAGS_NEEDS_MAPPED_V4; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } break; case SCTP_NODELAY: set_opt = SCTP_PCB_FLAGS_NODELAY; break; case SCTP_AUTOCLOSE: if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } set_opt = SCTP_PCB_FLAGS_AUTOCLOSE; /* * The value is in ticks. Note this does not effect * old associations, only new ones. */ inp->sctp_ep.auto_close_time = sctp_secs_to_ticks(*mopt); break; } SCTP_INP_WLOCK(inp); if (*mopt != 0) { sctp_feature_on(inp, set_opt); } else { sctp_feature_off(inp, set_opt); } SCTP_INP_WUNLOCK(inp); break; case SCTP_REUSE_PORT: { SCTP_CHECK_AND_CAST(mopt, optval, uint32_t, optsize); if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { /* Can't set it after we are bound */ error = EINVAL; break; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { /* Can't do this for a 1-m socket */ error = EINVAL; break; } if (optval) sctp_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE); else sctp_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE); break; } case SCTP_PARTIAL_DELIVERY_POINT: { uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, optsize); if (*value > SCTP_SB_LIMIT_RCV(so)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } inp->partial_delivery_point = *value; break; } case SCTP_FRAGMENT_INTERLEAVE: /* not yet until we re-write sctp_recvmsg() */ { uint32_t *level; SCTP_CHECK_AND_CAST(level, optval, uint32_t, optsize); if (*level == SCTP_FRAG_LEVEL_2) { sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); } else if (*level == SCTP_FRAG_LEVEL_1) { sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); } else if (*level == SCTP_FRAG_LEVEL_0) { sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } break; } case SCTP_INTERLEAVING_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->idata_supported = 0; } else { if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) && (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS))) { inp->idata_supported = 1; } else { /* * Must have Frag * interleave and * stream interleave * on */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_CMT_ON_OFF: if (SCTP_BASE_SYSCTL(sctp_cmt_on_off)) { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); if (av->assoc_value > SCTP_CMT_MAX) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.sctp_cmt_on_off = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->sctp_cmt_on_off = av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.sctp_cmt_on_off = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOPROTOOPT); error = ENOPROTOOPT; } break; case SCTP_PLUGGABLE_CC: { struct sctp_assoc_value *av; struct sctp_nets *net; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); if ((av->assoc_value != SCTP_CC_RFC2581) && (av->assoc_value != SCTP_CC_HSTCP) && (av->assoc_value != SCTP_CC_HTCP) && (av->assoc_value != SCTP_CC_RTCC)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.cc_functions = sctp_cc_functions[av->assoc_value]; stcb->asoc.congestion_control_module = av->assoc_value; if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); } } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->sctp_ep.sctp_default_cc_module = av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.cc_functions = sctp_cc_functions[av->assoc_value]; stcb->asoc.congestion_control_module = av->assoc_value; if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); } } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_CC_OPTION: { struct sctp_cc_option *cc_opt; SCTP_CHECK_AND_CAST(cc_opt, optval, struct sctp_cc_option, optsize); SCTP_FIND_STCB(inp, stcb, cc_opt->aid_value.assoc_id); if (stcb == NULL) { if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (cc_opt->aid_value.assoc_id == SCTP_CURRENT_ASSOC)) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (stcb->asoc.cc_functions.sctp_cwnd_socket_option) { (*stcb->asoc.cc_functions.sctp_cwnd_socket_option) (stcb, 1, cc_opt); } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } else { error = EINVAL; } } else { if (stcb->asoc.cc_functions.sctp_cwnd_socket_option == NULL) { error = ENOTSUP; } else { error = (*stcb->asoc.cc_functions.sctp_cwnd_socket_option) (stcb, 1, cc_opt); } SCTP_TCB_UNLOCK(stcb); } break; } case SCTP_PLUGGABLE_SS: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); if ((av->assoc_value != SCTP_SS_DEFAULT) && (av->assoc_value != SCTP_SS_ROUND_ROBIN) && (av->assoc_value != SCTP_SS_ROUND_ROBIN_PACKET) && (av->assoc_value != SCTP_SS_PRIORITY) && (av->assoc_value != SCTP_SS_FAIR_BANDWITH) && (av->assoc_value != SCTP_SS_FIRST_COME)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, true); stcb->asoc.ss_functions = sctp_ss_functions[av->assoc_value]; stcb->asoc.stream_scheduling_module = av->assoc_value; stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc); SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->sctp_ep.sctp_default_ss_module = av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, true); stcb->asoc.ss_functions = sctp_ss_functions[av->assoc_value]; stcb->asoc.stream_scheduling_module = av->assoc_value; stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_SS_VALUE: { struct sctp_stream_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_stream_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { if ((av->stream_id >= stcb->asoc.streamoutcnt) || (stcb->asoc.ss_functions.sctp_ss_set_value(stcb, &stcb->asoc, &stcb->asoc.strmout[av->stream_id], av->stream_value) < 0)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_CURRENT_ASSOC)) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (av->stream_id < stcb->asoc.streamoutcnt) { stcb->asoc.ss_functions.sctp_ss_set_value(stcb, &stcb->asoc, &stcb->asoc.strmout[av->stream_id], av->stream_value); } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } else { /* * Can't set stream value without * association */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_CLR_STAT_LOG: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; break; case SCTP_CONTEXT: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.context = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->sctp_context = av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.context = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_VRF_ID: { uint32_t *default_vrfid; SCTP_CHECK_AND_CAST(default_vrfid, optval, uint32_t, optsize); if (*default_vrfid > SCTP_MAX_VRF_ID) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } inp->def_vrf_id = *default_vrfid; break; } case SCTP_DEL_VRF_ID: { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; break; } case SCTP_ADD_VRF_ID: { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; break; } case SCTP_DELAYED_SACK: { struct sctp_sack_info *sack; SCTP_CHECK_AND_CAST(sack, optval, struct sctp_sack_info, optsize); SCTP_FIND_STCB(inp, stcb, sack->sack_assoc_id); if (sack->sack_delay) { if (sack->sack_delay > SCTP_MAX_SACK_DELAY) { error = EINVAL; if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } break; } } if (stcb) { if (sack->sack_delay) { stcb->asoc.delayed_ack = sack->sack_delay; } if (sack->sack_freq) { stcb->asoc.sack_freq = sack->sack_freq; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((sack->sack_assoc_id == SCTP_FUTURE_ASSOC) || (sack->sack_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); if (sack->sack_delay) { inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(sack->sack_delay); } if (sack->sack_freq) { inp->sctp_ep.sctp_sack_freq = sack->sack_freq; } SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((sack->sack_assoc_id == SCTP_CURRENT_ASSOC) || (sack->sack_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (sack->sack_delay) { stcb->asoc.delayed_ack = sack->sack_delay; } if (sack->sack_freq) { stcb->asoc.sack_freq = sack->sack_freq; } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_AUTH_CHUNK: { struct sctp_authchunk *sauth; SCTP_CHECK_AND_CAST(sauth, optval, struct sctp_authchunk, optsize); SCTP_INP_WLOCK(inp); if (sctp_auth_add_chunk(sauth->sauth_chunk, inp->sctp_ep.local_auth_chunks)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { inp->auth_supported = 1; } SCTP_INP_WUNLOCK(inp); break; } case SCTP_AUTH_KEY: { struct sctp_authkey *sca; struct sctp_keyhead *shared_keys; sctp_sharedkey_t *shared_key; sctp_key_t *key = NULL; size_t size; SCTP_CHECK_AND_CAST(sca, optval, struct sctp_authkey, optsize); if (sca->sca_keylength == 0) { size = optsize - sizeof(struct sctp_authkey); } else { if (sca->sca_keylength + sizeof(struct sctp_authkey) <= optsize) { size = sca->sca_keylength; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } } SCTP_FIND_STCB(inp, stcb, sca->sca_assoc_id); if (stcb) { shared_keys = &stcb->asoc.shared_keys; /* clear the cached keys for this key id */ sctp_clear_cachedkeys(stcb, sca->sca_keynumber); /* * create the new shared key and * insert/replace it */ if (size > 0) { key = sctp_set_key(sca->sca_key, (uint32_t)size); if (key == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; SCTP_TCB_UNLOCK(stcb); break; } } shared_key = sctp_alloc_sharedkey(); if (shared_key == NULL) { sctp_free_key(key); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; SCTP_TCB_UNLOCK(stcb); break; } shared_key->key = key; shared_key->keyid = sca->sca_keynumber; error = sctp_insert_sharedkey(shared_keys, shared_key); SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((sca->sca_assoc_id == SCTP_FUTURE_ASSOC) || (sca->sca_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); shared_keys = &inp->sctp_ep.shared_keys; /* * clear the cached keys on all * assocs for this key id */ sctp_clear_cachedkeys_ep(inp, sca->sca_keynumber); /* * create the new shared key and * insert/replace it */ if (size > 0) { key = sctp_set_key(sca->sca_key, (uint32_t)size); if (key == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; SCTP_INP_WUNLOCK(inp); break; } } shared_key = sctp_alloc_sharedkey(); if (shared_key == NULL) { sctp_free_key(key); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; SCTP_INP_WUNLOCK(inp); break; } shared_key->key = key; shared_key->keyid = sca->sca_keynumber; error = sctp_insert_sharedkey(shared_keys, shared_key); SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((sca->sca_assoc_id == SCTP_CURRENT_ASSOC) || (sca->sca_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); shared_keys = &stcb->asoc.shared_keys; /* * clear the cached keys for * this key id */ sctp_clear_cachedkeys(stcb, sca->sca_keynumber); /* * create the new shared key * and insert/replace it */ if (size > 0) { key = sctp_set_key(sca->sca_key, (uint32_t)size); if (key == NULL) { SCTP_TCB_UNLOCK(stcb); continue; } } shared_key = sctp_alloc_sharedkey(); if (shared_key == NULL) { sctp_free_key(key); SCTP_TCB_UNLOCK(stcb); continue; } shared_key->key = key; shared_key->keyid = sca->sca_keynumber; error = sctp_insert_sharedkey(shared_keys, shared_key); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_HMAC_IDENT: { struct sctp_hmacalgo *shmac; sctp_hmaclist_t *hmaclist; uint16_t hmacid; uint32_t i; SCTP_CHECK_AND_CAST(shmac, optval, struct sctp_hmacalgo, optsize); if ((optsize < sizeof(struct sctp_hmacalgo) + shmac->shmac_number_of_idents * sizeof(uint16_t)) || (shmac->shmac_number_of_idents > 0xffff)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } hmaclist = sctp_alloc_hmaclist((uint16_t)shmac->shmac_number_of_idents); if (hmaclist == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; break; } for (i = 0; i < shmac->shmac_number_of_idents; i++) { hmacid = shmac->shmac_idents[i]; if (sctp_auth_add_hmacid(hmaclist, hmacid)) { /* invalid HMACs were found */ ; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; sctp_free_hmaclist(hmaclist); goto sctp_set_hmac_done; } } for (i = 0; i < hmaclist->num_algo; i++) { if (hmaclist->hmac[i] == SCTP_AUTH_HMAC_ID_SHA1) { /* already in list */ break; } } if (i == hmaclist->num_algo) { /* not found in list */ sctp_free_hmaclist(hmaclist); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } /* set it on the endpoint */ SCTP_INP_WLOCK(inp); if (inp->sctp_ep.local_hmacs) sctp_free_hmaclist(inp->sctp_ep.local_hmacs); inp->sctp_ep.local_hmacs = hmaclist; SCTP_INP_WUNLOCK(inp); sctp_set_hmac_done: break; } case SCTP_AUTH_ACTIVE_KEY: { struct sctp_authkeyid *scact; SCTP_CHECK_AND_CAST(scact, optval, struct sctp_authkeyid, optsize); SCTP_FIND_STCB(inp, stcb, scact->scact_assoc_id); /* set the active key on the right place */ if (stcb) { /* set the active key on the assoc */ if (sctp_auth_setactivekey(stcb, scact->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((scact->scact_assoc_id == SCTP_FUTURE_ASSOC) || (scact->scact_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); if (sctp_auth_setactivekey_ep(inp, scact->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((scact->scact_assoc_id == SCTP_CURRENT_ASSOC) || (scact->scact_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); sctp_auth_setactivekey(stcb, scact->scact_keynumber); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_AUTH_DELETE_KEY: { struct sctp_authkeyid *scdel; SCTP_CHECK_AND_CAST(scdel, optval, struct sctp_authkeyid, optsize); SCTP_FIND_STCB(inp, stcb, scdel->scact_assoc_id); /* delete the key from the right place */ if (stcb) { if (sctp_delete_sharedkey(stcb, scdel->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((scdel->scact_assoc_id == SCTP_FUTURE_ASSOC) || (scdel->scact_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); if (sctp_delete_sharedkey_ep(inp, scdel->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((scdel->scact_assoc_id == SCTP_CURRENT_ASSOC) || (scdel->scact_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); sctp_delete_sharedkey(stcb, scdel->scact_keynumber); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_AUTH_DEACTIVATE_KEY: { struct sctp_authkeyid *keyid; SCTP_CHECK_AND_CAST(keyid, optval, struct sctp_authkeyid, optsize); SCTP_FIND_STCB(inp, stcb, keyid->scact_assoc_id); /* deactivate the key from the right place */ if (stcb) { if (sctp_deact_sharedkey(stcb, keyid->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((keyid->scact_assoc_id == SCTP_FUTURE_ASSOC) || (keyid->scact_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); if (sctp_deact_sharedkey_ep(inp, keyid->scact_keynumber)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((keyid->scact_assoc_id == SCTP_CURRENT_ASSOC) || (keyid->scact_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); sctp_deact_sharedkey(stcb, keyid->scact_keynumber); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_ENABLE_STREAM_RESET: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); if (av->assoc_value & (~SCTP_ENABLE_VALUE_MASK)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.local_strreset_support = (uint8_t)av->assoc_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->local_strreset_support = (uint8_t)av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.local_strreset_support = (uint8_t)av->assoc_value; SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_RESET_STREAMS: { struct sctp_reset_streams *strrst; int i, send_out = 0; int send_in = 0; SCTP_CHECK_AND_CAST(strrst, optval, struct sctp_reset_streams, optsize); SCTP_FIND_STCB(inp, stcb, strrst->srs_assoc_id); if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; break; } if (stcb->asoc.reconfig_supported == 0) { /* * Peer does not support the chunk type. */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; SCTP_TCB_UNLOCK(stcb); break; } if (SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); break; } if (sizeof(struct sctp_reset_streams) + strrst->srs_number_streams * sizeof(uint16_t) > optsize) { error = EINVAL; SCTP_TCB_UNLOCK(stcb); break; } if (strrst->srs_flags & SCTP_STREAM_RESET_INCOMING) { send_in = 1; if (stcb->asoc.stream_reset_outstanding) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); error = EALREADY; SCTP_TCB_UNLOCK(stcb); break; } } if (strrst->srs_flags & SCTP_STREAM_RESET_OUTGOING) { send_out = 1; } if ((strrst->srs_number_streams > SCTP_MAX_STREAMS_AT_ONCE_RESET) && send_in) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM); error = ENOMEM; SCTP_TCB_UNLOCK(stcb); break; } if ((send_in == 0) && (send_out == 0)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); break; } for (i = 0; i < strrst->srs_number_streams; i++) { if ((send_in) && (strrst->srs_stream_list[i] >= stcb->asoc.streamincnt)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if ((send_out) && (strrst->srs_stream_list[i] >= stcb->asoc.streamoutcnt)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } } if (error) { SCTP_TCB_UNLOCK(stcb); break; } if (send_out) { int cnt; uint16_t strm; if (strrst->srs_number_streams) { for (i = 0, cnt = 0; i < strrst->srs_number_streams; i++) { strm = strrst->srs_stream_list[i]; if (stcb->asoc.strmout[strm].state == SCTP_STREAM_OPEN) { stcb->asoc.strmout[strm].state = SCTP_STREAM_RESET_PENDING; cnt++; } } } else { /* Its all */ for (i = 0, cnt = 0; i < stcb->asoc.streamoutcnt; i++) { if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN) { stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING; cnt++; } } } } if (send_in) { error = sctp_send_str_reset_req(stcb, strrst->srs_number_streams, strrst->srs_stream_list, send_in, 0, 0, 0, 0, 0); } else { error = sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_LOCKED); } if (error == 0) { sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED); } else { /* * For outgoing streams don't report any * problems in sending the request to the * application. XXX: Double check resetting * incoming streams. */ error = 0; } SCTP_TCB_UNLOCK(stcb); break; } case SCTP_ADD_STREAMS: { struct sctp_add_streams *stradd; uint8_t addstream = 0; uint16_t add_o_strmcnt = 0; uint16_t add_i_strmcnt = 0; SCTP_CHECK_AND_CAST(stradd, optval, struct sctp_add_streams, optsize); SCTP_FIND_STCB(inp, stcb, stradd->sas_assoc_id); if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; break; } if (stcb->asoc.reconfig_supported == 0) { /* * Peer does not support the chunk type. */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; SCTP_TCB_UNLOCK(stcb); break; } if (SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); break; } if (stcb->asoc.stream_reset_outstanding) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); error = EALREADY; SCTP_TCB_UNLOCK(stcb); break; } if ((stradd->sas_outstrms == 0) && (stradd->sas_instrms == 0)) { error = EINVAL; goto skip_stuff; } if (stradd->sas_outstrms) { addstream = 1; /* We allocate here */ add_o_strmcnt = stradd->sas_outstrms; if ((((int)add_o_strmcnt) + ((int)stcb->asoc.streamoutcnt)) > 0x0000ffff) { /* You can't have more than 64k */ error = EINVAL; goto skip_stuff; } } if (stradd->sas_instrms) { int cnt; addstream |= 2; /* * We allocate inside * sctp_send_str_reset_req() */ add_i_strmcnt = stradd->sas_instrms; cnt = add_i_strmcnt; cnt += stcb->asoc.streamincnt; if (cnt > 0x0000ffff) { /* You can't have more than 64k */ error = EINVAL; goto skip_stuff; } if (cnt > (int)stcb->asoc.max_inbound_streams) { /* More than you are allowed */ error = EINVAL; goto skip_stuff; } } error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, addstream, add_o_strmcnt, add_i_strmcnt, 0); sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED); skip_stuff: SCTP_TCB_UNLOCK(stcb); break; } case SCTP_RESET_ASSOC: { int i; uint32_t *value; SCTP_CHECK_AND_CAST(value, optval, uint32_t, optsize); SCTP_FIND_STCB(inp, stcb, (sctp_assoc_t)*value); if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; break; } if (stcb->asoc.reconfig_supported == 0) { /* * Peer does not support the chunk type. */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); error = EOPNOTSUPP; SCTP_TCB_UNLOCK(stcb); break; } if (SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); break; } if (stcb->asoc.stream_reset_outstanding) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); error = EALREADY; SCTP_TCB_UNLOCK(stcb); break; } /* * Is there any data pending in the send or sent * queues? */ if (!TAILQ_EMPTY(&stcb->asoc.send_queue) || !TAILQ_EMPTY(&stcb->asoc.sent_queue)) { busy_out: error = EBUSY; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); SCTP_TCB_UNLOCK(stcb); break; } /* Do any streams have data queued? */ for (i = 0; i < stcb->asoc.streamoutcnt; i++) { if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { goto busy_out; } } error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 1, 0, 0, 0, 0); sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED); SCTP_TCB_UNLOCK(stcb); break; } case SCTP_CONNECT_X: if (optsize < (sizeof(int) + sizeof(struct sockaddr_in))) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } error = sctp_do_connect_x(so, inp, optval, optsize, p, 0); break; case SCTP_CONNECT_X_DELAYED: if (optsize < (sizeof(int) + sizeof(struct sockaddr_in))) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } error = sctp_do_connect_x(so, inp, optval, optsize, p, 1); break; case SCTP_CONNECT_X_COMPLETE: { struct sockaddr *sa; /* FIXME MT: check correct? */ SCTP_CHECK_AND_CAST(sa, optval, struct sockaddr, optsize); /* find tcb */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if (stcb == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); error = ENOENT; break; } if (stcb->asoc.delayed_connection == 1) { stcb->asoc.delayed_connection = 0; (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, stcb->asoc.primary_destination, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_8); sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); } else { /* * already expired or did not use delayed * connectx */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); error = EALREADY; } SCTP_TCB_UNLOCK(stcb); break; } case SCTP_MAX_BURST: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.max_burst = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_FUTURE_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->sctp_ep.max_burst = av->assoc_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((av->assoc_id == SCTP_CURRENT_ASSOC) || (av->assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.max_burst = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_MAXSEG: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.sctp_frag_point = av->assoc_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); inp->sctp_frag_point = av->assoc_value; SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_EVENTS: { struct sctp_event_subscribe *events; SCTP_CHECK_AND_CAST(events, optval, struct sctp_event_subscribe, optsize); SCTP_INP_WLOCK(inp); if (events->sctp_data_io_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT); } if (events->sctp_association_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVASSOCEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVASSOCEVNT); } if (events->sctp_address_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVPADDREVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVPADDREVNT); } if (events->sctp_send_failure_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVSENDFAILEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVSENDFAILEVNT); } if (events->sctp_peer_error_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVPEERERR); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVPEERERR); } if (events->sctp_shutdown_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT); } if (events->sctp_partial_delivery_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_PDAPIEVNT); } if (events->sctp_adaptation_layer_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_ADAPTATIONEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_ADAPTATIONEVNT); } if (events->sctp_authentication_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTHEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTHEVNT); } if (events->sctp_sender_dry_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_DRYEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_DRYEVNT); } if (events->sctp_stream_reset_event) { sctp_feature_on(inp, SCTP_PCB_FLAGS_STREAM_RESETEVNT); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_STREAM_RESETEVNT); } LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (events->sctp_association_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT); } if (events->sctp_address_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT); } if (events->sctp_send_failure_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT); } if (events->sctp_peer_error_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVPEERERR); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_RECVPEERERR); } if (events->sctp_shutdown_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT); } if (events->sctp_partial_delivery_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT); } if (events->sctp_adaptation_layer_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT); } if (events->sctp_authentication_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_AUTHEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_AUTHEVNT); } if (events->sctp_sender_dry_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_DRYEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_DRYEVNT); } if (events->sctp_stream_reset_event) { sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT); } else { sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT); } SCTP_TCB_UNLOCK(stcb); } /* * Send up the sender dry event only for 1-to-1 * style sockets. */ if (events->sctp_sender_dry_event) { if (((inp->sctp_flags & (SCTP_PCB_FLAGS_TCPTYPE | SCTP_PCB_FLAGS_IN_TCPPOOL)) != 0) && !SCTP_IS_LISTENING(inp)) { stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb != NULL) { SCTP_TCB_LOCK(stcb); if (TAILQ_EMPTY(&stcb->asoc.send_queue) && TAILQ_EMPTY(&stcb->asoc.sent_queue) && (stcb->asoc.stream_queue_cnt == 0)) { sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_LOCKED); } SCTP_TCB_UNLOCK(stcb); } } } SCTP_INP_WUNLOCK(inp); break; } case SCTP_ADAPTATION_LAYER: { struct sctp_setadaptation *adap_bits; SCTP_CHECK_AND_CAST(adap_bits, optval, struct sctp_setadaptation, optsize); SCTP_INP_WLOCK(inp); inp->sctp_ep.adaptation_layer_indicator = adap_bits->ssb_adaptation_ind; inp->sctp_ep.adaptation_layer_indicator_provided = 1; SCTP_INP_WUNLOCK(inp); break; } #ifdef SCTP_DEBUG case SCTP_SET_INITIAL_DBG_SEQ: { uint32_t *vvv; SCTP_CHECK_AND_CAST(vvv, optval, uint32_t, optsize); SCTP_INP_WLOCK(inp); inp->sctp_ep.initial_sequence_debug = *vvv; SCTP_INP_WUNLOCK(inp); break; } #endif case SCTP_DEFAULT_SEND_PARAM: { struct sctp_sndrcvinfo *s_info; SCTP_CHECK_AND_CAST(s_info, optval, struct sctp_sndrcvinfo, optsize); SCTP_FIND_STCB(inp, stcb, s_info->sinfo_assoc_id); if (stcb) { if (s_info->sinfo_stream < stcb->asoc.streamoutcnt) { memcpy(&stcb->asoc.def_send, s_info, min(optsize, sizeof(stcb->asoc.def_send))); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((s_info->sinfo_assoc_id == SCTP_FUTURE_ASSOC) || (s_info->sinfo_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); memcpy(&inp->def_send, s_info, min(optsize, sizeof(inp->def_send))); SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((s_info->sinfo_assoc_id == SCTP_CURRENT_ASSOC) || (s_info->sinfo_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (s_info->sinfo_stream < stcb->asoc.streamoutcnt) { memcpy(&stcb->asoc.def_send, s_info, min(optsize, sizeof(stcb->asoc.def_send))); } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_PEER_ADDR_PARAMS: { struct sctp_paddrparams *paddrp; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(paddrp, optval, struct sctp_paddrparams, optsize); SCTP_FIND_STCB(inp, stcb, paddrp->spp_assoc_id); #if defined(INET) && defined(INET6) if (paddrp->spp_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&paddrp->spp_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&paddrp->spp_address; } } else { addr = (struct sockaddr *)&paddrp->spp_address; } #else addr = (struct sockaddr *)&paddrp->spp_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } /* sanity checks */ if ((paddrp->spp_flags & SPP_HB_ENABLE) && (paddrp->spp_flags & SPP_HB_DISABLE)) { if (stcb) SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if ((paddrp->spp_flags & SPP_PMTUD_ENABLE) && (paddrp->spp_flags & SPP_PMTUD_DISABLE)) { if (stcb) SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if ((paddrp->spp_flags & SPP_PMTUD_DISABLE) && (paddrp->spp_pathmtu > 0) && ((paddrp->spp_pathmtu < SCTP_SMALLEST_PMTU) || (paddrp->spp_pathmtu > SCTP_LARGEST_PMTU))) { if (stcb) SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } if (stcb != NULL) { /************************TCB SPECIFIC SET ******************/ if (net != NULL) { /************************NET SPECIFIC SET ******************/ if (paddrp->spp_flags & SPP_HB_DISABLE) { if (((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) && ((net->dest_state & SCTP_ADDR_NOHB) == 0)) { sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_9); } net->dest_state |= SCTP_ADDR_NOHB; } if (paddrp->spp_flags & SPP_HB_ENABLE) { if (paddrp->spp_hbinterval) { net->heart_beat_delay = paddrp->spp_hbinterval; } else if (paddrp->spp_flags & SPP_HB_TIME_IS_ZERO) { net->heart_beat_delay = 0; } sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_10); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); net->dest_state &= ~SCTP_ADDR_NOHB; } if (paddrp->spp_flags & SPP_HB_DEMAND) { if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { sctp_send_hb(stcb, net, SCTP_SO_LOCKED); sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SOCKOPT, SCTP_SO_LOCKED); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); } } if (paddrp->spp_flags & SPP_PMTUD_DISABLE) { if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_11); } net->dest_state |= SCTP_ADDR_NO_PMTUD; if (paddrp->spp_pathmtu > 0) { net->mtu = paddrp->spp_pathmtu; switch (net->ro._l_addr.sa.sa_family) { #ifdef INET case AF_INET: net->mtu += SCTP_MIN_V4_OVERHEAD; break; #endif #ifdef INET6 case AF_INET6: net->mtu += SCTP_MIN_OVERHEAD; break; #endif default: break; } if (net->mtu < stcb->asoc.smallest_mtu) { sctp_pathmtu_adjustment(stcb, net->mtu, true); } } } if (paddrp->spp_flags & SPP_PMTUD_ENABLE) { if (!SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); } net->dest_state &= ~SCTP_ADDR_NO_PMTUD; } if (paddrp->spp_pathmaxrxt > 0) { if (net->dest_state & SCTP_ADDR_PF) { if (net->error_count > paddrp->spp_pathmaxrxt) { net->dest_state &= ~SCTP_ADDR_PF; } } else { if ((net->error_count <= paddrp->spp_pathmaxrxt) && (net->error_count > net->pf_threshold)) { net->dest_state |= SCTP_ADDR_PF; sctp_send_hb(stcb, net, SCTP_SO_LOCKED); sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_12); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); } } if (net->dest_state & SCTP_ADDR_REACHABLE) { if (net->error_count > paddrp->spp_pathmaxrxt) { net->dest_state &= ~SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, net, SCTP_SO_LOCKED); } } else { if (net->error_count <= paddrp->spp_pathmaxrxt) { net->dest_state |= SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 0, net, SCTP_SO_LOCKED); } } net->failure_threshold = paddrp->spp_pathmaxrxt; } if (paddrp->spp_flags & SPP_DSCP) { net->dscp = paddrp->spp_dscp & 0xfc; net->dscp |= 0x01; } #ifdef INET6 if (paddrp->spp_flags & SPP_IPV6_FLOWLABEL) { if (net->ro._l_addr.sa.sa_family == AF_INET6) { net->flowlabel = paddrp->spp_ipv6_flowlabel & 0x000fffff; net->flowlabel |= 0x80000000; } } #endif } else { /************************ASSOC ONLY -- NO NET SPECIFIC SET ******************/ if (paddrp->spp_pathmaxrxt > 0) { stcb->asoc.def_net_failure = paddrp->spp_pathmaxrxt; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (net->dest_state & SCTP_ADDR_PF) { if (net->error_count > paddrp->spp_pathmaxrxt) { net->dest_state &= ~SCTP_ADDR_PF; } } else { if ((net->error_count <= paddrp->spp_pathmaxrxt) && (net->error_count > net->pf_threshold)) { net->dest_state |= SCTP_ADDR_PF; sctp_send_hb(stcb, net, SCTP_SO_LOCKED); sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_13); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); } } if (net->dest_state & SCTP_ADDR_REACHABLE) { if (net->error_count > paddrp->spp_pathmaxrxt) { net->dest_state &= ~SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, net, SCTP_SO_LOCKED); } } else { if (net->error_count <= paddrp->spp_pathmaxrxt) { net->dest_state |= SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 0, net, SCTP_SO_LOCKED); } } net->failure_threshold = paddrp->spp_pathmaxrxt; } } if (paddrp->spp_flags & SPP_HB_ENABLE) { if (paddrp->spp_hbinterval != 0) { stcb->asoc.heart_beat_delay = paddrp->spp_hbinterval; } else if (paddrp->spp_flags & SPP_HB_TIME_IS_ZERO) { stcb->asoc.heart_beat_delay = 0; } /* Turn back on the timer */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (paddrp->spp_hbinterval != 0) { net->heart_beat_delay = paddrp->spp_hbinterval; } else if (paddrp->spp_flags & SPP_HB_TIME_IS_ZERO) { net->heart_beat_delay = 0; } if (net->dest_state & SCTP_ADDR_NOHB) { net->dest_state &= ~SCTP_ADDR_NOHB; } sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_14); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); } sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT); } if (paddrp->spp_flags & SPP_HB_DISABLE) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if ((net->dest_state & SCTP_ADDR_NOHB) == 0) { net->dest_state |= SCTP_ADDR_NOHB; if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_15); } } } sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT); } if (paddrp->spp_flags & SPP_PMTUD_DISABLE) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_16); } net->dest_state |= SCTP_ADDR_NO_PMTUD; if (paddrp->spp_pathmtu > 0) { net->mtu = paddrp->spp_pathmtu; switch (net->ro._l_addr.sa.sa_family) { #ifdef INET case AF_INET: net->mtu += SCTP_MIN_V4_OVERHEAD; break; #endif #ifdef INET6 case AF_INET6: net->mtu += SCTP_MIN_OVERHEAD; break; #endif default: break; } if (net->mtu < stcb->asoc.smallest_mtu) { sctp_pathmtu_adjustment(stcb, net->mtu, true); } } } if (paddrp->spp_pathmtu > 0) { stcb->asoc.default_mtu = paddrp->spp_pathmtu; } sctp_stcb_feature_on(inp, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD); } if (paddrp->spp_flags & SPP_PMTUD_ENABLE) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (!SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); } net->dest_state &= ~SCTP_ADDR_NO_PMTUD; } stcb->asoc.default_mtu = 0; sctp_stcb_feature_off(inp, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD); } if (paddrp->spp_flags & SPP_DSCP) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { net->dscp = paddrp->spp_dscp & 0xfc; net->dscp |= 0x01; } stcb->asoc.default_dscp = paddrp->spp_dscp & 0xfc; stcb->asoc.default_dscp |= 0x01; } #ifdef INET6 if (paddrp->spp_flags & SPP_IPV6_FLOWLABEL) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (net->ro._l_addr.sa.sa_family == AF_INET6) { net->flowlabel = paddrp->spp_ipv6_flowlabel & 0x000fffff; net->flowlabel |= 0x80000000; } } stcb->asoc.default_flowlabel = paddrp->spp_ipv6_flowlabel & 0x000fffff; stcb->asoc.default_flowlabel |= 0x80000000; } #endif } SCTP_TCB_UNLOCK(stcb); } else { /************************NO TCB, SET TO default stuff ******************/ if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (paddrp->spp_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); /* * For the TOS/FLOWLABEL stuff you * set it with the options on the * socket */ if (paddrp->spp_pathmaxrxt > 0) { inp->sctp_ep.def_net_failure = paddrp->spp_pathmaxrxt; } if (paddrp->spp_flags & SPP_HB_TIME_IS_ZERO) inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = 0; else if (paddrp->spp_hbinterval != 0) { if (paddrp->spp_hbinterval > SCTP_MAX_HB_INTERVAL) paddrp->spp_hbinterval = SCTP_MAX_HB_INTERVAL; inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(paddrp->spp_hbinterval); } if (paddrp->spp_flags & SPP_HB_ENABLE) { if (paddrp->spp_flags & SPP_HB_TIME_IS_ZERO) { inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = 0; } else if (paddrp->spp_hbinterval) { inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(paddrp->spp_hbinterval); } sctp_feature_off(inp, SCTP_PCB_FLAGS_DONOT_HEARTBEAT); } else if (paddrp->spp_flags & SPP_HB_DISABLE) { sctp_feature_on(inp, SCTP_PCB_FLAGS_DONOT_HEARTBEAT); } if (paddrp->spp_flags & SPP_PMTUD_ENABLE) { inp->sctp_ep.default_mtu = 0; sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_NOT_PMTUD); } else if (paddrp->spp_flags & SPP_PMTUD_DISABLE) { if (paddrp->spp_pathmtu > 0) { inp->sctp_ep.default_mtu = paddrp->spp_pathmtu; } sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_NOT_PMTUD); } if (paddrp->spp_flags & SPP_DSCP) { inp->sctp_ep.default_dscp = paddrp->spp_dscp & 0xfc; inp->sctp_ep.default_dscp |= 0x01; } #ifdef INET6 if (paddrp->spp_flags & SPP_IPV6_FLOWLABEL) { if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { inp->sctp_ep.default_flowlabel = paddrp->spp_ipv6_flowlabel & 0x000fffff; inp->sctp_ep.default_flowlabel |= 0x80000000; } } #endif SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_RTOINFO: { struct sctp_rtoinfo *srto; uint32_t new_init, new_min, new_max; SCTP_CHECK_AND_CAST(srto, optval, struct sctp_rtoinfo, optsize); SCTP_FIND_STCB(inp, stcb, srto->srto_assoc_id); if (stcb) { if (srto->srto_initial) new_init = srto->srto_initial; else new_init = stcb->asoc.initial_rto; if (srto->srto_max) new_max = srto->srto_max; else new_max = stcb->asoc.maxrto; if (srto->srto_min) new_min = srto->srto_min; else new_min = stcb->asoc.minrto; if ((new_min <= new_init) && (new_init <= new_max)) { stcb->asoc.initial_rto = new_init; stcb->asoc.maxrto = new_max; stcb->asoc.minrto = new_min; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (srto->srto_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (srto->srto_initial) new_init = srto->srto_initial; else new_init = inp->sctp_ep.initial_rto; if (srto->srto_max) new_max = srto->srto_max; else new_max = inp->sctp_ep.sctp_maxrto; if (srto->srto_min) new_min = srto->srto_min; else new_min = inp->sctp_ep.sctp_minrto; if ((new_min <= new_init) && (new_init <= new_max)) { inp->sctp_ep.initial_rto = new_init; inp->sctp_ep.sctp_maxrto = new_max; inp->sctp_ep.sctp_minrto = new_min; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_ASSOCINFO: { struct sctp_assocparams *sasoc; SCTP_CHECK_AND_CAST(sasoc, optval, struct sctp_assocparams, optsize); SCTP_FIND_STCB(inp, stcb, sasoc->sasoc_assoc_id); if (sasoc->sasoc_cookie_life > 0) { /* boundary check the cookie life */ if (sasoc->sasoc_cookie_life < SCTP_MIN_COOKIE_LIFE) { sasoc->sasoc_cookie_life = SCTP_MIN_COOKIE_LIFE; } if (sasoc->sasoc_cookie_life > SCTP_MAX_COOKIE_LIFE) { sasoc->sasoc_cookie_life = SCTP_MAX_COOKIE_LIFE; } } if (stcb) { if (sasoc->sasoc_asocmaxrxt > 0) { stcb->asoc.max_send_times = sasoc->sasoc_asocmaxrxt; } if (sasoc->sasoc_cookie_life > 0) { stcb->asoc.cookie_life = sctp_msecs_to_ticks(sasoc->sasoc_cookie_life); } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (sasoc->sasoc_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (sasoc->sasoc_asocmaxrxt > 0) { inp->sctp_ep.max_send_times = sasoc->sasoc_asocmaxrxt; } if (sasoc->sasoc_cookie_life > 0) { inp->sctp_ep.def_cookie_life = sctp_msecs_to_ticks(sasoc->sasoc_cookie_life); } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_INITMSG: { struct sctp_initmsg *sinit; SCTP_CHECK_AND_CAST(sinit, optval, struct sctp_initmsg, optsize); SCTP_INP_WLOCK(inp); if (sinit->sinit_num_ostreams) inp->sctp_ep.pre_open_stream_count = sinit->sinit_num_ostreams; if (sinit->sinit_max_instreams) inp->sctp_ep.max_open_streams_intome = sinit->sinit_max_instreams; if (sinit->sinit_max_attempts) inp->sctp_ep.max_init_times = sinit->sinit_max_attempts; if (sinit->sinit_max_init_timeo) inp->sctp_ep.initial_init_rto_max = sinit->sinit_max_init_timeo; SCTP_INP_WUNLOCK(inp); break; } case SCTP_PRIMARY_ADDR: { struct sctp_setprim *spa; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(spa, optval, struct sctp_setprim, optsize); SCTP_FIND_STCB(inp, stcb, spa->ssp_assoc_id); #if defined(INET) && defined(INET6) if (spa->ssp_addr.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&spa->ssp_addr; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&spa->ssp_addr; } } else { addr = (struct sockaddr *)&spa->ssp_addr; } #else addr = (struct sockaddr *)&spa->ssp_addr; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net != NULL)) { if (net != stcb->asoc.primary_destination) { if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { /* Ok we need to set it */ if (sctp_set_primary_addr(stcb, (struct sockaddr *)NULL, net) == 0) { if ((stcb->asoc.alternate) && ((net->dest_state & SCTP_ADDR_PF) == 0) && (net->dest_state & SCTP_ADDR_REACHABLE)) { sctp_free_remote_addr(stcb->asoc.alternate); stcb->asoc.alternate = NULL; } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } break; } case SCTP_SET_DYNAMIC_PRIMARY: { union sctp_sockstore *ss; error = priv_check(curthread, PRIV_NETINET_RESERVEDPORT); if (error) break; SCTP_CHECK_AND_CAST(ss, optval, union sctp_sockstore, optsize); /* SUPER USER CHECK? */ error = sctp_dynamic_set_primary(&ss->sa, vrf_id); break; } case SCTP_SET_PEER_PRIMARY_ADDR: { struct sctp_setpeerprim *sspp; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(sspp, optval, struct sctp_setpeerprim, optsize); SCTP_FIND_STCB(inp, stcb, sspp->sspp_assoc_id); if (stcb != NULL) { struct sctp_ifa *ifa; #if defined(INET) && defined(INET6) if (sspp->sspp_addr.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&sspp->sspp_addr; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&sspp->sspp_addr; } } else { addr = (struct sockaddr *)&sspp->sspp_addr; } #else addr = (struct sockaddr *)&sspp->sspp_addr; #endif ifa = sctp_find_ifa_by_addr(addr, stcb->asoc.vrf_id, SCTP_ADDR_NOT_LOCKED); if (ifa == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_of_it; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { /* * Must validate the ifa found is in * our ep */ struct sctp_laddr *laddr; int found = 0; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == NULL) { SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", __func__); continue; } if ((sctp_is_addr_restricted(stcb, laddr->ifa)) && (!sctp_is_addr_pending(stcb, laddr->ifa))) { continue; } if (laddr->ifa == ifa) { found = 1; break; } } if (!found) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_of_it; } } else { switch (addr->sa_family) { #ifdef INET case AF_INET: { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (prison_check_ip4(inp->ip_inp.inp.inp_cred, &sin->sin_addr) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_of_it; } break; } #endif #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (prison_check_ip6(inp->ip_inp.inp.inp_cred, &sin6->sin6_addr) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_of_it; } break; } #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_of_it; } } if (sctp_set_primary_ip_address_sa(stcb, addr) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SOCKOPT, SCTP_SO_LOCKED); out_of_it: SCTP_TCB_UNLOCK(stcb); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } break; } case SCTP_BINDX_ADD_ADDR: { struct sockaddr *sa; struct thread *td; td = (struct thread *)p; SCTP_CHECK_AND_CAST(sa, optval, struct sockaddr, optsize); #ifdef INET if (sa->sa_family == AF_INET) { if (optsize < sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (td != NULL && (error = prison_local_ip4(td->td_ucred, &(((struct sockaddr_in *)sa)->sin_addr)))) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif #ifdef INET6 if (sa->sa_family == AF_INET6) { if (optsize < sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (td != NULL && (error = prison_local_ip6(td->td_ucred, &(((struct sockaddr_in6 *)sa)->sin6_addr), (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif { error = EAFNOSUPPORT; break; } sctp_bindx_add_address(so, inp, sa, vrf_id, &error, p); break; } case SCTP_BINDX_REM_ADDR: { struct sockaddr *sa; struct thread *td; td = (struct thread *)p; SCTP_CHECK_AND_CAST(sa, optval, struct sockaddr, optsize); #ifdef INET if (sa->sa_family == AF_INET) { if (optsize < sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (td != NULL && (error = prison_local_ip4(td->td_ucred, &(((struct sockaddr_in *)sa)->sin_addr)))) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif #ifdef INET6 if (sa->sa_family == AF_INET6) { if (optsize < sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (td != NULL && (error = prison_local_ip6(td->td_ucred, &(((struct sockaddr_in6 *)sa)->sin6_addr), (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } else #endif { error = EAFNOSUPPORT; break; } sctp_bindx_delete_address(inp, sa, vrf_id, &error); break; } case SCTP_EVENT: { struct sctp_event *event; uint32_t event_type; SCTP_CHECK_AND_CAST(event, optval, struct sctp_event, optsize); SCTP_FIND_STCB(inp, stcb, event->se_assoc_id); switch (event->se_type) { case SCTP_ASSOC_CHANGE: event_type = SCTP_PCB_FLAGS_RECVASSOCEVNT; break; case SCTP_PEER_ADDR_CHANGE: event_type = SCTP_PCB_FLAGS_RECVPADDREVNT; break; case SCTP_REMOTE_ERROR: event_type = SCTP_PCB_FLAGS_RECVPEERERR; break; case SCTP_SEND_FAILED: event_type = SCTP_PCB_FLAGS_RECVSENDFAILEVNT; break; case SCTP_SHUTDOWN_EVENT: event_type = SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT; break; case SCTP_ADAPTATION_INDICATION: event_type = SCTP_PCB_FLAGS_ADAPTATIONEVNT; break; case SCTP_PARTIAL_DELIVERY_EVENT: event_type = SCTP_PCB_FLAGS_PDAPIEVNT; break; case SCTP_AUTHENTICATION_EVENT: event_type = SCTP_PCB_FLAGS_AUTHEVNT; break; case SCTP_STREAM_RESET_EVENT: event_type = SCTP_PCB_FLAGS_STREAM_RESETEVNT; break; case SCTP_SENDER_DRY_EVENT: event_type = SCTP_PCB_FLAGS_DRYEVNT; break; case SCTP_NOTIFICATIONS_STOPPED_EVENT: event_type = 0; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTSUP); error = ENOTSUP; break; case SCTP_ASSOC_RESET_EVENT: event_type = SCTP_PCB_FLAGS_ASSOC_RESETEVNT; break; case SCTP_STREAM_CHANGE_EVENT: event_type = SCTP_PCB_FLAGS_STREAM_CHANGEEVNT; break; case SCTP_SEND_FAILED_EVENT: event_type = SCTP_PCB_FLAGS_RECVNSENDFAILEVNT; break; default: event_type = 0; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (event_type > 0) { if (stcb) { if (event->se_on) { sctp_stcb_feature_on(inp, stcb, event_type); if (event_type == SCTP_PCB_FLAGS_DRYEVNT) { if (TAILQ_EMPTY(&stcb->asoc.send_queue) && TAILQ_EMPTY(&stcb->asoc.sent_queue) && (stcb->asoc.stream_queue_cnt == 0)) { sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_LOCKED); } } } else { sctp_stcb_feature_off(inp, stcb, event_type); } SCTP_TCB_UNLOCK(stcb); } else { /* * We don't want to send up a storm * of events, so return an error for * sender dry events */ if ((event_type == SCTP_PCB_FLAGS_DRYEVNT) && (inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((event->se_assoc_id == SCTP_ALL_ASSOC) || (event->se_assoc_id == SCTP_CURRENT_ASSOC))) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTSUP); error = ENOTSUP; break; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((event->se_assoc_id == SCTP_FUTURE_ASSOC) || (event->se_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); if (event->se_on) { sctp_feature_on(inp, event_type); } else { sctp_feature_off(inp, event_type); } SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((event->se_assoc_id == SCTP_CURRENT_ASSOC) || (event->se_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (event->se_on) { sctp_stcb_feature_on(inp, stcb, event_type); } else { sctp_stcb_feature_off(inp, stcb, event_type); } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } } else { if (stcb) { SCTP_TCB_UNLOCK(stcb); } } break; } case SCTP_RECVRCVINFO: { int *onoff; SCTP_CHECK_AND_CAST(onoff, optval, int, optsize); SCTP_INP_WLOCK(inp); if (*onoff != 0) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVRCVINFO); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO); } SCTP_INP_WUNLOCK(inp); break; } case SCTP_RECVNXTINFO: { int *onoff; SCTP_CHECK_AND_CAST(onoff, optval, int, optsize); SCTP_INP_WLOCK(inp); if (*onoff != 0) { sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO); } else { sctp_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO); } SCTP_INP_WUNLOCK(inp); break; } case SCTP_DEFAULT_SNDINFO: { struct sctp_sndinfo *info; uint16_t policy; SCTP_CHECK_AND_CAST(info, optval, struct sctp_sndinfo, optsize); SCTP_FIND_STCB(inp, stcb, info->snd_assoc_id); if (stcb) { if (info->snd_sid < stcb->asoc.streamoutcnt) { stcb->asoc.def_send.sinfo_stream = info->snd_sid; policy = PR_SCTP_POLICY(stcb->asoc.def_send.sinfo_flags); stcb->asoc.def_send.sinfo_flags = info->snd_flags; stcb->asoc.def_send.sinfo_flags |= policy; stcb->asoc.def_send.sinfo_ppid = info->snd_ppid; stcb->asoc.def_send.sinfo_context = info->snd_context; } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((info->snd_assoc_id == SCTP_FUTURE_ASSOC) || (info->snd_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->def_send.sinfo_stream = info->snd_sid; policy = PR_SCTP_POLICY(inp->def_send.sinfo_flags); inp->def_send.sinfo_flags = info->snd_flags; inp->def_send.sinfo_flags |= policy; inp->def_send.sinfo_ppid = info->snd_ppid; inp->def_send.sinfo_context = info->snd_context; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((info->snd_assoc_id == SCTP_CURRENT_ASSOC) || (info->snd_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); if (info->snd_sid < stcb->asoc.streamoutcnt) { stcb->asoc.def_send.sinfo_stream = info->snd_sid; policy = PR_SCTP_POLICY(stcb->asoc.def_send.sinfo_flags); stcb->asoc.def_send.sinfo_flags = info->snd_flags; stcb->asoc.def_send.sinfo_flags |= policy; stcb->asoc.def_send.sinfo_ppid = info->snd_ppid; stcb->asoc.def_send.sinfo_context = info->snd_context; } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_DEFAULT_PRINFO: { struct sctp_default_prinfo *info; SCTP_CHECK_AND_CAST(info, optval, struct sctp_default_prinfo, optsize); SCTP_FIND_STCB(inp, stcb, info->pr_assoc_id); if (info->pr_policy > SCTP_PR_SCTP_MAX) { if (stcb) { SCTP_TCB_UNLOCK(stcb); } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; break; } if (stcb) { stcb->asoc.def_send.sinfo_flags &= 0xfff0; stcb->asoc.def_send.sinfo_flags |= info->pr_policy; stcb->asoc.def_send.sinfo_timetolive = info->pr_value; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((info->pr_assoc_id == SCTP_FUTURE_ASSOC) || (info->pr_assoc_id == SCTP_ALL_ASSOC)))) { SCTP_INP_WLOCK(inp); inp->def_send.sinfo_flags &= 0xfff0; inp->def_send.sinfo_flags |= info->pr_policy; inp->def_send.sinfo_timetolive = info->pr_value; SCTP_INP_WUNLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && ((info->pr_assoc_id == SCTP_CURRENT_ASSOC) || (info->pr_assoc_id == SCTP_ALL_ASSOC))) { SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { SCTP_TCB_LOCK(stcb); stcb->asoc.def_send.sinfo_flags &= 0xfff0; stcb->asoc.def_send.sinfo_flags |= info->pr_policy; stcb->asoc.def_send.sinfo_timetolive = info->pr_value; SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } } break; } case SCTP_PEER_ADDR_THLDS: /* Applies to the specific association */ { struct sctp_paddrthlds *thlds; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(thlds, optval, struct sctp_paddrthlds, optsize); SCTP_FIND_STCB(inp, stcb, thlds->spt_assoc_id); #if defined(INET) && defined(INET6) if (thlds->spt_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&thlds->spt_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&thlds->spt_address; } } else { addr = (struct sockaddr *)&thlds->spt_address; } #else addr = (struct sockaddr *)&thlds->spt_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } if (thlds->spt_pathcpthld != 0xffff) { if (stcb != NULL) { SCTP_TCB_UNLOCK(stcb); } error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } if (stcb != NULL) { if (net != NULL) { net->failure_threshold = thlds->spt_pathmaxrxt; net->pf_threshold = thlds->spt_pathpfthld; if (net->dest_state & SCTP_ADDR_PF) { if ((net->error_count > net->failure_threshold) || (net->error_count <= net->pf_threshold)) { net->dest_state &= ~SCTP_ADDR_PF; } } else { if ((net->error_count > net->pf_threshold) && (net->error_count <= net->failure_threshold)) { net->dest_state |= SCTP_ADDR_PF; sctp_send_hb(stcb, net, SCTP_SO_LOCKED); sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_17); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); } } if (net->dest_state & SCTP_ADDR_REACHABLE) { if (net->error_count > net->failure_threshold) { net->dest_state &= ~SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, net, SCTP_SO_LOCKED); } } else { if (net->error_count <= net->failure_threshold) { net->dest_state |= SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 0, net, SCTP_SO_LOCKED); } } } else { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { net->failure_threshold = thlds->spt_pathmaxrxt; net->pf_threshold = thlds->spt_pathpfthld; if (net->dest_state & SCTP_ADDR_PF) { if ((net->error_count > net->failure_threshold) || (net->error_count <= net->pf_threshold)) { net->dest_state &= ~SCTP_ADDR_PF; } } else { if ((net->error_count > net->pf_threshold) && (net->error_count <= net->failure_threshold)) { net->dest_state |= SCTP_ADDR_PF; sctp_send_hb(stcb, net, SCTP_SO_LOCKED); sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_18); sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); } } if (net->dest_state & SCTP_ADDR_REACHABLE) { if (net->error_count > net->failure_threshold) { net->dest_state &= ~SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, net, SCTP_SO_LOCKED); } } else { if (net->error_count <= net->failure_threshold) { net->dest_state |= SCTP_ADDR_REACHABLE; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb, 0, net, SCTP_SO_LOCKED); } } } stcb->asoc.def_net_failure = thlds->spt_pathmaxrxt; stcb->asoc.def_net_pf_threshold = thlds->spt_pathpfthld; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (thlds->spt_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); inp->sctp_ep.def_net_failure = thlds->spt_pathmaxrxt; inp->sctp_ep.def_net_pf_threshold = thlds->spt_pathpfthld; SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_REMOTE_UDP_ENCAPS_PORT: { struct sctp_udpencaps *encaps; struct sctp_nets *net; struct sockaddr *addr; #if defined(INET) && defined(INET6) struct sockaddr_in sin_store; #endif SCTP_CHECK_AND_CAST(encaps, optval, struct sctp_udpencaps, optsize); SCTP_FIND_STCB(inp, stcb, encaps->sue_assoc_id); #if defined(INET) && defined(INET6) if (encaps->sue_address.ss_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&encaps->sue_address; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin_store, sin6); addr = (struct sockaddr *)&sin_store; } else { addr = (struct sockaddr *)&encaps->sue_address; } } else { addr = (struct sockaddr *)&encaps->sue_address; } #else addr = (struct sockaddr *)&encaps->sue_address; #endif if (stcb != NULL) { net = sctp_findnet(stcb, addr); } else { /* * We increment here since * sctp_findassociation_ep_addr() wil do a * decrement if it finds the stcb as long as * the locked tcb (last argument) is NOT a * TCB.. aka NULL. */ net = NULL; SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, &net, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } } if ((stcb != NULL) && (net == NULL)) { #ifdef INET if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)addr; if (sin->sin_addr.s_addr != INADDR_ANY) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif #ifdef INET6 if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); SCTP_TCB_UNLOCK(stcb); error = EINVAL; break; } } else #endif { error = EAFNOSUPPORT; SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); break; } } if (stcb != NULL) { if (net != NULL) { net->port = encaps->sue_port; } else { stcb->asoc.port = encaps->sue_port; } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (encaps->sue_assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); inp->sctp_ep.port = encaps->sue_port; SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_ECN_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->ecn_supported = 0; } else { inp->ecn_supported = 1; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_PR_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->prsctp_supported = 0; } else { inp->prsctp_supported = 1; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_AUTH_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { if ((av->assoc_value == 0) && (inp->asconf_supported == 1)) { /* * AUTH is required for * ASCONF */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->auth_supported = 0; } else { inp->auth_supported = 1; } SCTP_INP_WUNLOCK(inp); } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_ASCONF_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { if ((av->assoc_value != 0) && (inp->auth_supported == 0)) { /* * AUTH is required for * ASCONF */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } else { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->asconf_supported = 0; sctp_auth_delete_chunk(SCTP_ASCONF, inp->sctp_ep.local_auth_chunks); sctp_auth_delete_chunk(SCTP_ASCONF_ACK, inp->sctp_ep.local_auth_chunks); } else { inp->asconf_supported = 1; sctp_auth_add_chunk(SCTP_ASCONF, inp->sctp_ep.local_auth_chunks); sctp_auth_add_chunk(SCTP_ASCONF_ACK, inp->sctp_ep.local_auth_chunks); } SCTP_INP_WUNLOCK(inp); } } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_RECONFIG_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->reconfig_supported = 0; } else { inp->reconfig_supported = 1; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_NRSACK_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->nrsack_supported = 0; } else { inp->nrsack_supported = 1; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_PKTDROP_SUPPORTED: { struct sctp_assoc_value *av; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); if (av->assoc_value == 0) { inp->pktdrop_supported = 0; } else { inp->pktdrop_supported = 1; } SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } case SCTP_MAX_CWND: { struct sctp_assoc_value *av; struct sctp_nets *net; SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize); SCTP_FIND_STCB(inp, stcb, av->assoc_id); if (stcb) { stcb->asoc.max_cwnd = av->assoc_value; if (stcb->asoc.max_cwnd > 0) { TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if ((net->cwnd > stcb->asoc.max_cwnd) && (net->cwnd > (net->mtu - sizeof(struct sctphdr)))) { net->cwnd = stcb->asoc.max_cwnd; if (net->cwnd < (net->mtu - sizeof(struct sctphdr))) { net->cwnd = net->mtu - sizeof(struct sctphdr); } } } } SCTP_TCB_UNLOCK(stcb); } else { if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) && (av->assoc_id == SCTP_FUTURE_ASSOC))) { SCTP_INP_WLOCK(inp); inp->max_cwnd = av->assoc_value; SCTP_INP_WUNLOCK(inp); } else { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } } break; } default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOPROTOOPT); error = ENOPROTOOPT; break; } /* end switch (opt) */ return (error); } int sctp_ctloutput(struct socket *so, struct sockopt *sopt) { struct epoch_tracker et; struct sctp_inpcb *inp; void *optval = NULL; void *p; size_t optsize = 0; int error = 0; if ((sopt->sopt_level == SOL_SOCKET) && (sopt->sopt_name == SO_SETFIB)) { inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(so->so_pcb, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOBUFS); return (EINVAL); } SCTP_INP_WLOCK(inp); inp->fibnum = so->so_fibnum; SCTP_INP_WUNLOCK(inp); return (0); } if (sopt->sopt_level != IPPROTO_SCTP) { /* wrong proto level... send back up to IP */ #ifdef INET6 if (INP_CHECK_SOCKAF(so, AF_INET6)) error = ip6_ctloutput(so, sopt); #endif /* INET6 */ #if defined(INET) && defined(INET6) else #endif #ifdef INET error = ip_ctloutput(so, sopt); #endif return (error); } optsize = sopt->sopt_valsize; if (optsize > SCTP_SOCKET_OPTION_LIMIT) { SCTP_LTRACE_ERR_RET(so->so_pcb, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOBUFS); return (ENOBUFS); } if (optsize) { SCTP_MALLOC(optval, void *, optsize, SCTP_M_SOCKOPT); if (optval == NULL) { SCTP_LTRACE_ERR_RET(so->so_pcb, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOBUFS); return (ENOBUFS); } error = sooptcopyin(sopt, optval, optsize, optsize); if (error) { SCTP_FREE(optval, SCTP_M_SOCKOPT); goto out; } } p = (void *)sopt->sopt_td; if (sopt->sopt_dir == SOPT_SET) { NET_EPOCH_ENTER(et); error = sctp_setopt(so, sopt->sopt_name, optval, optsize, p); NET_EPOCH_EXIT(et); } else if (sopt->sopt_dir == SOPT_GET) { error = sctp_getopt(so, sopt->sopt_name, optval, &optsize, p); } else { SCTP_LTRACE_ERR_RET(so->so_pcb, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; } if ((error == 0) && (optval != NULL)) { error = sooptcopyout(sopt, optval, optsize); SCTP_FREE(optval, SCTP_M_SOCKOPT); } else if (optval != NULL) { SCTP_FREE(optval, SCTP_M_SOCKOPT); } out: return (error); } #ifdef INET static int sctp_connect(struct socket *so, struct sockaddr *addr, struct thread *p) { struct epoch_tracker et; int error = 0; int create_lock_on = 0; uint32_t vrf_id; struct sctp_inpcb *inp; struct sctp_tcb *stcb = NULL; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { /* I made the same as TCP since we are not setup? */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } if (addr == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return EINVAL; } switch (addr->sa_family) { #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6; if (addr->sa_len != sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } sin6 = (struct sockaddr_in6 *)addr; if (p != NULL && (error = prison_remote_ip6(p->td_ucred, &sin6->sin6_addr)) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); return (error); } break; } #endif #ifdef INET case AF_INET: { struct sockaddr_in *sin; if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (EINVAL); } sin = (struct sockaddr_in *)addr; if (p != NULL && (error = prison_remote_ip4(p->td_ucred, &sin->sin_addr)) != 0) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); return (error); } break; } #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EAFNOSUPPORT); return (EAFNOSUPPORT); } SCTP_INP_INCR_REF(inp); SCTP_ASOC_CREATE_LOCK(inp); create_lock_on = 1; NET_EPOCH_ENTER(et); if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { /* Should I really unlock ? */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EFAULT); error = EFAULT; goto out_now; } #ifdef INET6 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && (addr->sa_family == AF_INET6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_now; } #endif if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { /* Bind a ephemeral port */ error = sctp_inpcb_bind(so, NULL, NULL, p); if (error) { goto out_now; } } /* Now do we connect? */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE))) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); error = EINVAL; goto out_now; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { /* We are already connected AND the TCP model */ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_USRREQ, EADDRINUSE); error = EADDRINUSE; goto out_now; } if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); SCTP_INP_RUNLOCK(inp); } else { /* * We increment here since sctp_findassociation_ep_addr() * will do a decrement if it finds the stcb as long as the * locked tcb (last argument) is NOT a TCB.. aka NULL. */ SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); if (stcb == NULL) { SCTP_INP_DECR_REF(inp); } else { SCTP_TCB_UNLOCK(stcb); } } if (stcb != NULL) { /* Already have or am bring up an association */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); error = EALREADY; goto out_now; } vrf_id = inp->def_vrf_id; /* We are GOOD to go */ stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, inp->sctp_ep.port, p, SCTP_INITIALIZE_AUTH_PARAMS); if (stcb == NULL) { /* Gak! no memory */ goto out_now; } SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); SCTP_TCB_UNLOCK(stcb); out_now: NET_EPOCH_EXIT(et); if (create_lock_on) { SCTP_ASOC_CREATE_UNLOCK(inp); } SCTP_INP_DECR_REF(inp); return (error); } #endif int sctp_listen(struct socket *so, int backlog, struct thread *p) { /* * Note this module depends on the protocol processing being called * AFTER any socket level flags and backlog are applied to the * socket. The traditional way that the socket flags are applied is * AFTER protocol processing. We have made a change to the * sys/kern/uipc_socket.c module to reverse this but this MUST be in * place if the socket API for SCTP is to work properly. */ int error = 0; struct sctp_inpcb *inp; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { /* I made the same as TCP since we are not setup? */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) { /* See if we have a listener */ struct sctp_inpcb *tinp; union sctp_sockstore store; if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { /* not bound all */ struct sctp_laddr *laddr; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { memcpy(&store, &laddr->ifa->address, sizeof(store)); switch (store.sa.sa_family) { #ifdef INET case AF_INET: store.sin.sin_port = inp->sctp_lport; break; #endif #ifdef INET6 case AF_INET6: store.sin6.sin6_port = inp->sctp_lport; break; #endif default: break; } tinp = sctp_pcb_findep(&store.sa, 0, 0, inp->def_vrf_id); if (tinp && (tinp != inp) && ((tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0) && ((tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && (SCTP_IS_LISTENING(tinp))) { /* * we have a listener already and * its not this inp. */ SCTP_INP_DECR_REF(tinp); return (EADDRINUSE); } else if (tinp) { SCTP_INP_DECR_REF(tinp); } } } else { /* Setup a local addr bound all */ memset(&store, 0, sizeof(store)); #ifdef INET6 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { store.sa.sa_family = AF_INET6; store.sa.sa_len = sizeof(struct sockaddr_in6); } #endif #ifdef INET if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { store.sa.sa_family = AF_INET; store.sa.sa_len = sizeof(struct sockaddr_in); } #endif switch (store.sa.sa_family) { #ifdef INET case AF_INET: store.sin.sin_port = inp->sctp_lport; break; #endif #ifdef INET6 case AF_INET6: store.sin6.sin6_port = inp->sctp_lport; break; #endif default: break; } tinp = sctp_pcb_findep(&store.sa, 0, 0, inp->def_vrf_id); if (tinp && (tinp != inp) && ((tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0) && ((tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && (SCTP_IS_LISTENING(tinp))) { /* * we have a listener already and its not * this inp. */ SCTP_INP_DECR_REF(tinp); return (EADDRINUSE); } else if (tinp) { SCTP_INP_DECR_REF(tinp); } } } SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(inp); #ifdef SCTP_LOCK_LOGGING if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) { sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK); } #endif if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { /* * The unlucky case - We are in the tcp pool with this guy. * - Someone else is in the main inp slot. - We must move * this guy (the listener) to the main slot - We must then * move the guy that was listener to the TCP Pool. */ if (sctp_swap_inpcb_for_listen(inp)) { error = EADDRINUSE; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); goto out; } } SOCK_LOCK(so); error = solisten_proto_check(so); if (error) { SOCK_UNLOCK(so); goto out; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { SOCK_UNLOCK(so); solisten_proto_abort(so); error = EADDRINUSE; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); goto out; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED))) { SOCK_UNLOCK(so); solisten_proto_abort(so); error = EINVAL; SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); goto out; } if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { if ((error = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { SOCK_UNLOCK(so); solisten_proto_abort(so); /* bind error, probably perm */ goto out; } } if ((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) == 0) { solisten_proto(so, backlog); SOCK_UNLOCK(so); inp->sctp_flags |= SCTP_PCB_FLAGS_ACCEPTING; } else { solisten_proto_abort(so); SOCK_UNLOCK(so); if (backlog > 0) { inp->sctp_flags |= SCTP_PCB_FLAGS_ACCEPTING; } else { inp->sctp_flags &= ~SCTP_PCB_FLAGS_ACCEPTING; } } out: SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (error); } static int sctp_defered_wakeup_cnt = 0; int sctp_accept(struct socket *so, struct sockaddr **addr) { struct sctp_tcb *stcb; struct sctp_inpcb *inp; union sctp_sockstore store; #ifdef INET6 int error; #endif inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } SCTP_INP_WLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) { SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); return (EOPNOTSUPP); } if (so->so_state & SS_ISDISCONNECTED) { SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ECONNABORTED); return (ECONNABORTED); } stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } SCTP_TCB_LOCK(stcb); store = stcb->asoc.primary_destination->ro._l_addr; SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); /* Wake any delayed sleep action */ if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { inp->sctp_flags &= ~SCTP_PCB_FLAGS_DONT_WAKE; if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT) { inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; SOCKBUF_LOCK(&inp->sctp_socket->so_snd); if (sowriteable(inp->sctp_socket)) { sowwakeup_locked(inp->sctp_socket); } else { SOCKBUF_UNLOCK(&inp->sctp_socket->so_snd); } } if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT) { inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; SOCKBUF_LOCK(&inp->sctp_socket->so_rcv); if (soreadable(inp->sctp_socket)) { sctp_defered_wakeup_cnt++; sorwakeup_locked(inp->sctp_socket); } else { SOCKBUF_UNLOCK(&inp->sctp_socket->so_rcv); } } } SCTP_INP_WUNLOCK(inp); if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_19); } else { SCTP_TCB_UNLOCK(stcb); } switch (store.sa.sa_family) { #ifdef INET case AF_INET: { struct sockaddr_in *sin; SCTP_MALLOC_SONAME(sin, struct sockaddr_in *, sizeof *sin); if (sin == NULL) return (ENOMEM); sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); sin->sin_port = store.sin.sin_port; sin->sin_addr = store.sin.sin_addr; *addr = (struct sockaddr *)sin; break; } #endif #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6; SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); if (sin6 == NULL) return (ENOMEM); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); sin6->sin6_port = store.sin6.sin6_port; sin6->sin6_addr = store.sin6.sin6_addr; if ((error = sa6_recoverscope(sin6)) != 0) { SCTP_FREE_SONAME(sin6); return (error); } *addr = (struct sockaddr *)sin6; break; } #endif default: /* TSNH */ break; } return (0); } #ifdef INET int sctp_ingetaddr(struct socket *so, struct sockaddr **addr) { struct sockaddr_in *sin; uint32_t vrf_id; struct sctp_inpcb *inp; struct sctp_ifa *sctp_ifa; /* * Do the malloc first in case it blocks. */ SCTP_MALLOC_SONAME(sin, struct sockaddr_in *, sizeof *sin); if (sin == NULL) return (ENOMEM); sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); inp = (struct sctp_inpcb *)so->so_pcb; if (!inp) { SCTP_FREE_SONAME(sin); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } SCTP_INP_RLOCK(inp); sin->sin_port = inp->sctp_lport; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { struct sctp_tcb *stcb; struct sockaddr_in *sin_a; struct sctp_nets *net; int fnd; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { goto notConn; } fnd = 0; sin_a = NULL; SCTP_TCB_LOCK(stcb); TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a = (struct sockaddr_in *)&net->ro._l_addr; if (sin_a == NULL) /* this will make coverity happy */ continue; if (sin_a->sin_family == AF_INET) { fnd = 1; break; } } if ((!fnd) || (sin_a == NULL)) { /* punt */ SCTP_TCB_UNLOCK(stcb); goto notConn; } vrf_id = inp->def_vrf_id; sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); if (sctp_ifa) { sin->sin_addr = sctp_ifa->address.sin.sin_addr; sctp_free_ifa(sctp_ifa); } SCTP_TCB_UNLOCK(stcb); } else { /* For the bound all case you get back 0 */ notConn: sin->sin_addr.s_addr = 0; } } else { /* Take the first IPv4 address in the list */ struct sctp_laddr *laddr; int fnd = 0; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa->address.sa.sa_family == AF_INET) { struct sockaddr_in *sin_a; sin_a = &laddr->ifa->address.sin; sin->sin_addr = sin_a->sin_addr; fnd = 1; break; } } if (!fnd) { SCTP_FREE_SONAME(sin); SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); return (ENOENT); } } SCTP_INP_RUNLOCK(inp); (*addr) = (struct sockaddr *)sin; return (0); } int sctp_peeraddr(struct socket *so, struct sockaddr **addr) { struct sockaddr_in *sin; int fnd; struct sockaddr_in *sin_a; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; /* Do the malloc first in case it blocks. */ SCTP_MALLOC_SONAME(sin, struct sockaddr_in *, sizeof *sin); if (sin == NULL) return (ENOMEM); sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); inp = (struct sctp_inpcb *)so->so_pcb; if ((inp == NULL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { /* UDP type and listeners will drop out here */ SCTP_FREE_SONAME(sin); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOTCONN); return (ENOTCONN); } SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); if (stcb == NULL) { SCTP_FREE_SONAME(sin); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } fnd = 0; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a = (struct sockaddr_in *)&net->ro._l_addr; if (sin_a->sin_family == AF_INET) { fnd = 1; sin->sin_port = stcb->rport; sin->sin_addr = sin_a->sin_addr; break; } } SCTP_TCB_UNLOCK(stcb); if (!fnd) { /* No IPv4 address */ SCTP_FREE_SONAME(sin); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOENT); return (ENOENT); } (*addr) = (struct sockaddr *)sin; return (0); } #define SCTP_PROTOSW \ .pr_protocol = IPPROTO_SCTP, \ .pr_ctloutput = sctp_ctloutput, \ .pr_abort = sctp_abort, \ .pr_accept = sctp_accept, \ .pr_attach = sctp_attach, \ .pr_bind = sctp_bind, \ .pr_connect = sctp_connect, \ .pr_control = in_control, \ .pr_close = sctp_close, \ .pr_detach = sctp_close, \ .pr_sopoll = sopoll_generic, \ .pr_flush = sctp_flush, \ .pr_disconnect = sctp_disconnect, \ .pr_listen = sctp_listen, \ .pr_peeraddr = sctp_peeraddr, \ .pr_send = sctp_sendm, \ .pr_shutdown = sctp_shutdown, \ .pr_sockaddr = sctp_ingetaddr, \ .pr_sosend = sctp_sosend, \ .pr_soreceive = sctp_soreceive \ struct protosw sctp_seqpacket_protosw = { .pr_type = SOCK_SEQPACKET, .pr_flags = PR_WANTRCVD, SCTP_PROTOSW }; struct protosw sctp_stream_protosw = { .pr_type = SOCK_STREAM, .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, SCTP_PROTOSW }; #endif diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index e88b3b92b193..7e9fe9e4ff5f 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1,4159 +1,4124 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_kern_tls.h" #include "opt_tcpdebug.h" #include #include #include #include #include #ifdef TCP_HHOOK #include #endif #include #ifdef TCP_HHOOK #include #endif #ifdef KERN_TLS #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET6 #include #include #include #include #include #include #include #endif #include #ifdef INVARIANTS #define TCPSTATES #endif #include #include #include #include #include #include #include #include #include #include #ifdef TCPPCAP #include #endif #ifdef TCPDEBUG #include #endif #ifdef TCP_OFFLOAD #include #endif #include #include #ifdef INET6 #include #endif #include #include #include #include static ip6proto_ctlinput_t tcp6_ctlinput; static udp_tun_icmp_t tcp6_ctlinput_viaudp; VNET_DEFINE(int, tcp_mssdflt) = TCP_MSS; #ifdef INET6 VNET_DEFINE(int, tcp_v6mssdflt) = TCP6_MSS; #endif #ifdef NETFLIX_EXP_DETECTION /* Sack attack detection thresholds and such */ SYSCTL_NODE(_net_inet_tcp, OID_AUTO, sack_attack, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "Sack Attack detection thresholds"); int32_t tcp_force_detection = 0; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, force_detection, CTLFLAG_RW, &tcp_force_detection, 0, "Do we force detection even if the INP has it off?"); int32_t tcp_sack_to_ack_thresh = 700; /* 70 % */ SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, sack_to_ack_thresh, CTLFLAG_RW, &tcp_sack_to_ack_thresh, 700, "Percentage of sacks to acks we must see above (10.1 percent is 101)?"); int32_t tcp_sack_to_move_thresh = 600; /* 60 % */ SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, move_thresh, CTLFLAG_RW, &tcp_sack_to_move_thresh, 600, "Percentage of sack moves we must see above (10.1 percent is 101)"); int32_t tcp_restoral_thresh = 650; /* 65 % (sack:2:ack -5%) */ SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, restore_thresh, CTLFLAG_RW, &tcp_restoral_thresh, 550, "Percentage of sack to ack percentage we must see below to restore(10.1 percent is 101)"); int32_t tcp_sad_decay_val = 800; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, decay_per, CTLFLAG_RW, &tcp_sad_decay_val, 800, "The decay percentage (10.1 percent equals 101 )"); int32_t tcp_map_minimum = 500; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, nummaps, CTLFLAG_RW, &tcp_map_minimum, 500, "Number of Map enteries before we start detection"); int32_t tcp_attack_on_turns_on_logging = 0; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, attacks_logged, CTLFLAG_RW, &tcp_attack_on_turns_on_logging, 0, "When we have a positive hit on attack, do we turn on logging?"); int32_t tcp_sad_pacing_interval = 2000; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, sad_pacing_int, CTLFLAG_RW, &tcp_sad_pacing_interval, 2000, "What is the minimum pacing interval for a classified attacker?"); int32_t tcp_sad_low_pps = 100; SYSCTL_INT(_net_inet_tcp_sack_attack, OID_AUTO, sad_low_pps, CTLFLAG_RW, &tcp_sad_low_pps, 100, "What is the input pps that below which we do not decay?"); #endif uint32_t tcp_ack_war_time_window = 1000; SYSCTL_UINT(_net_inet_tcp, OID_AUTO, ack_war_timewindow, CTLFLAG_RW, &tcp_ack_war_time_window, 1000, "If the tcp_stack does ack-war prevention how many milliseconds are in its time window?"); uint32_t tcp_ack_war_cnt = 5; SYSCTL_UINT(_net_inet_tcp, OID_AUTO, ack_war_cnt, CTLFLAG_RW, &tcp_ack_war_cnt, 5, "If the tcp_stack does ack-war prevention how many acks can be sent in its time window?"); struct rwlock tcp_function_lock; static int sysctl_net_inet_tcp_mss_check(SYSCTL_HANDLER_ARGS) { int error, new; new = V_tcp_mssdflt; error = sysctl_handle_int(oidp, &new, 0, req); if (error == 0 && req->newptr) { if (new < TCP_MINMSS) error = EINVAL; else V_tcp_mssdflt = new; } return (error); } SYSCTL_PROC(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &VNET_NAME(tcp_mssdflt), 0, &sysctl_net_inet_tcp_mss_check, "I", "Default TCP Maximum Segment Size"); #ifdef INET6 static int sysctl_net_inet_tcp_mss_v6_check(SYSCTL_HANDLER_ARGS) { int error, new; new = V_tcp_v6mssdflt; error = sysctl_handle_int(oidp, &new, 0, req); if (error == 0 && req->newptr) { if (new < TCP_MINMSS) error = EINVAL; else V_tcp_v6mssdflt = new; } return (error); } SYSCTL_PROC(_net_inet_tcp, TCPCTL_V6MSSDFLT, v6mssdflt, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &VNET_NAME(tcp_v6mssdflt), 0, &sysctl_net_inet_tcp_mss_v6_check, "I", "Default TCP Maximum Segment Size for IPv6"); #endif /* INET6 */ /* * Minimum MSS we accept and use. This prevents DoS attacks where * we are forced to a ridiculous low MSS like 20 and send hundreds * of packets instead of one. The effect scales with the available * bandwidth and quickly saturates the CPU and network interface * with packet generation and sending. Set to zero to disable MINMSS * checking. This setting prevents us from sending too small packets. */ VNET_DEFINE(int, tcp_minmss) = TCP_MINMSS; SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmss, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_minmss), 0, "Minimum TCP Maximum Segment Size"); VNET_DEFINE(int, tcp_do_rfc1323) = 1; SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_do_rfc1323), 0, "Enable rfc1323 (high performance TCP) extensions"); /* * As of June 2021, several TCP stacks violate RFC 7323 from September 2014. * Some stacks negotiate TS, but never send them after connection setup. Some * stacks negotiate TS, but don't send them when sending keep-alive segments. * These include modern widely deployed TCP stacks. * Therefore tolerating violations for now... */ VNET_DEFINE(int, tcp_tolerate_missing_ts) = 1; SYSCTL_INT(_net_inet_tcp, OID_AUTO, tolerate_missing_ts, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_tolerate_missing_ts), 0, "Tolerate missing TCP timestamps"); VNET_DEFINE(int, tcp_ts_offset_per_conn) = 1; SYSCTL_INT(_net_inet_tcp, OID_AUTO, ts_offset_per_conn, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_ts_offset_per_conn), 0, "Initialize TCP timestamps per connection instead of per host pair"); /* How many connections are pacing */ static volatile uint32_t number_of_tcp_connections_pacing = 0; static uint32_t shadow_num_connections = 0; static int tcp_pacing_limit = 10000; SYSCTL_INT(_net_inet_tcp, OID_AUTO, pacing_limit, CTLFLAG_RW, &tcp_pacing_limit, 1000, "If the TCP stack does pacing, is there a limit (-1 = no, 0 = no pacing N = number of connections)"); SYSCTL_UINT(_net_inet_tcp, OID_AUTO, pacing_count, CTLFLAG_RD, &shadow_num_connections, 0, "Number of TCP connections being paced"); static int tcp_log_debug = 0; SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_debug, CTLFLAG_RW, &tcp_log_debug, 0, "Log errors caused by incoming TCP segments"); static int tcp_tcbhashsize; SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcbhashsize, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &tcp_tcbhashsize, 0, "Size of TCP control-block hashtable"); static int do_tcpdrain = 1; SYSCTL_INT(_net_inet_tcp, OID_AUTO, do_tcpdrain, CTLFLAG_RW, &do_tcpdrain, 0, "Enable tcp_drain routine for extra help when low on mbufs"); SYSCTL_UINT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_VNET | CTLFLAG_RD, &VNET_NAME(tcbinfo.ipi_count), 0, "Number of active PCBs"); VNET_DEFINE_STATIC(int, icmp_may_rst) = 1; #define V_icmp_may_rst VNET(icmp_may_rst) SYSCTL_INT(_net_inet_tcp, OID_AUTO, icmp_may_rst, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp_may_rst), 0, "Certain ICMP unreachable messages may abort connections in SYN_SENT"); VNET_DEFINE_STATIC(int, tcp_isn_reseed_interval) = 0; #define V_tcp_isn_reseed_interval VNET(tcp_isn_reseed_interval) SYSCTL_INT(_net_inet_tcp, OID_AUTO, isn_reseed_interval, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_isn_reseed_interval), 0, "Seconds between reseeding of ISN secret"); static int tcp_soreceive_stream; SYSCTL_INT(_net_inet_tcp, OID_AUTO, soreceive_stream, CTLFLAG_RDTUN, &tcp_soreceive_stream, 0, "Using soreceive_stream for TCP sockets"); VNET_DEFINE(uma_zone_t, sack_hole_zone); #define V_sack_hole_zone VNET(sack_hole_zone) VNET_DEFINE(uint32_t, tcp_map_entries_limit) = 0; /* unlimited */ static int sysctl_net_inet_tcp_map_limit_check(SYSCTL_HANDLER_ARGS) { int error; uint32_t new; new = V_tcp_map_entries_limit; error = sysctl_handle_int(oidp, &new, 0, req); if (error == 0 && req->newptr) { /* only allow "0" and value > minimum */ if (new > 0 && new < TCP_MIN_MAP_ENTRIES_LIMIT) error = EINVAL; else V_tcp_map_entries_limit = new; } return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, map_limit, CTLFLAG_VNET | CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &VNET_NAME(tcp_map_entries_limit), 0, &sysctl_net_inet_tcp_map_limit_check, "IU", "Total sendmap entries limit"); VNET_DEFINE(uint32_t, tcp_map_split_limit) = 0; /* unlimited */ SYSCTL_UINT(_net_inet_tcp, OID_AUTO, split_limit, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_map_split_limit), 0, "Total sendmap split entries limit"); #ifdef TCP_HHOOK VNET_DEFINE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST+1]); #endif #define TS_OFFSET_SECRET_LENGTH SIPHASH_KEY_LENGTH VNET_DEFINE_STATIC(u_char, ts_offset_secret[TS_OFFSET_SECRET_LENGTH]); #define V_ts_offset_secret VNET(ts_offset_secret) static int tcp_default_fb_init(struct tcpcb *tp); static void tcp_default_fb_fini(struct tcpcb *tp, int tcb_is_purged); static int tcp_default_handoff_ok(struct tcpcb *tp); static struct inpcb *tcp_notify(struct inpcb *, int); static struct inpcb *tcp_mtudisc_notify(struct inpcb *, int); static struct inpcb *tcp_mtudisc(struct inpcb *, int); static char * tcp_log_addr(struct in_conninfo *inc, struct tcphdr *th, const void *ip4hdr, const void *ip6hdr); static ipproto_ctlinput_t tcp_ctlinput; static udp_tun_icmp_t tcp_ctlinput_viaudp; static struct tcp_function_block tcp_def_funcblk = { .tfb_tcp_block_name = "freebsd", .tfb_tcp_output = tcp_default_output, .tfb_tcp_do_segment = tcp_do_segment, .tfb_tcp_ctloutput = tcp_default_ctloutput, .tfb_tcp_handoff_ok = tcp_default_handoff_ok, .tfb_tcp_fb_init = tcp_default_fb_init, .tfb_tcp_fb_fini = tcp_default_fb_fini, }; static int tcp_fb_cnt = 0; struct tcp_funchead t_functions; static struct tcp_function_block *tcp_func_set_ptr = &tcp_def_funcblk; void tcp_record_dsack(struct tcpcb *tp, tcp_seq start, tcp_seq end, int tlp) { TCPSTAT_INC(tcps_dsack_count); tp->t_dsack_pack++; if (tlp == 0) { if (SEQ_GT(end, start)) { tp->t_dsack_bytes += (end - start); TCPSTAT_ADD(tcps_dsack_bytes, (end - start)); } else { tp->t_dsack_tlp_bytes += (start - end); TCPSTAT_ADD(tcps_dsack_bytes, (start - end)); } } else { if (SEQ_GT(end, start)) { tp->t_dsack_bytes += (end - start); TCPSTAT_ADD(tcps_dsack_tlp_bytes, (end - start)); } else { tp->t_dsack_tlp_bytes += (start - end); TCPSTAT_ADD(tcps_dsack_tlp_bytes, (start - end)); } } } static struct tcp_function_block * find_tcp_functions_locked(struct tcp_function_set *fs) { struct tcp_function *f; struct tcp_function_block *blk=NULL; TAILQ_FOREACH(f, &t_functions, tf_next) { if (strcmp(f->tf_name, fs->function_set_name) == 0) { blk = f->tf_fb; break; } } return(blk); } static struct tcp_function_block * find_tcp_fb_locked(struct tcp_function_block *blk, struct tcp_function **s) { struct tcp_function_block *rblk=NULL; struct tcp_function *f; TAILQ_FOREACH(f, &t_functions, tf_next) { if (f->tf_fb == blk) { rblk = blk; if (s) { *s = f; } break; } } return (rblk); } struct tcp_function_block * find_and_ref_tcp_functions(struct tcp_function_set *fs) { struct tcp_function_block *blk; rw_rlock(&tcp_function_lock); blk = find_tcp_functions_locked(fs); if (blk) refcount_acquire(&blk->tfb_refcnt); rw_runlock(&tcp_function_lock); return(blk); } struct tcp_function_block * find_and_ref_tcp_fb(struct tcp_function_block *blk) { struct tcp_function_block *rblk; rw_rlock(&tcp_function_lock); rblk = find_tcp_fb_locked(blk, NULL); if (rblk) refcount_acquire(&rblk->tfb_refcnt); rw_runlock(&tcp_function_lock); return(rblk); } /* Find a matching alias for the given tcp_function_block. */ int find_tcp_function_alias(struct tcp_function_block *blk, struct tcp_function_set *fs) { struct tcp_function *f; int found; found = 0; rw_rlock(&tcp_function_lock); TAILQ_FOREACH(f, &t_functions, tf_next) { if ((f->tf_fb == blk) && (strncmp(f->tf_name, blk->tfb_tcp_block_name, TCP_FUNCTION_NAME_LEN_MAX) != 0)) { /* Matching function block with different name. */ strncpy(fs->function_set_name, f->tf_name, TCP_FUNCTION_NAME_LEN_MAX); found = 1; break; } } /* Null terminate the string appropriately. */ if (found) { fs->function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; } else { fs->function_set_name[0] = '\0'; } rw_runlock(&tcp_function_lock); return (found); } static struct tcp_function_block * find_and_ref_tcp_default_fb(void) { struct tcp_function_block *rblk; rw_rlock(&tcp_function_lock); rblk = tcp_func_set_ptr; refcount_acquire(&rblk->tfb_refcnt); rw_runlock(&tcp_function_lock); return (rblk); } void tcp_switch_back_to_default(struct tcpcb *tp) { struct tcp_function_block *tfb; KASSERT(tp->t_fb != &tcp_def_funcblk, ("%s: called by the built-in default stack", __func__)); /* * Release the old stack. This function will either find a new one * or panic. */ if (tp->t_fb->tfb_tcp_fb_fini != NULL) (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); refcount_release(&tp->t_fb->tfb_refcnt); /* * Now, we'll find a new function block to use. * Start by trying the current user-selected * default, unless this stack is the user-selected * default. */ tfb = find_and_ref_tcp_default_fb(); if (tfb == tp->t_fb) { refcount_release(&tfb->tfb_refcnt); tfb = NULL; } /* Does the stack accept this connection? */ if (tfb != NULL && tfb->tfb_tcp_handoff_ok != NULL && (*tfb->tfb_tcp_handoff_ok)(tp)) { refcount_release(&tfb->tfb_refcnt); tfb = NULL; } /* Try to use that stack. */ if (tfb != NULL) { /* Initialize the new stack. If it succeeds, we are done. */ tp->t_fb = tfb; if (tp->t_fb->tfb_tcp_fb_init == NULL || (*tp->t_fb->tfb_tcp_fb_init)(tp) == 0) return; /* * Initialization failed. Release the reference count on * the stack. */ refcount_release(&tfb->tfb_refcnt); } /* * If that wasn't feasible, use the built-in default * stack which is not allowed to reject anyone. */ tfb = find_and_ref_tcp_fb(&tcp_def_funcblk); if (tfb == NULL) { /* there always should be a default */ panic("Can't refer to tcp_def_funcblk"); } if (tfb->tfb_tcp_handoff_ok != NULL) { if ((*tfb->tfb_tcp_handoff_ok) (tp)) { /* The default stack cannot say no */ panic("Default stack rejects a new session?"); } } tp->t_fb = tfb; if (tp->t_fb->tfb_tcp_fb_init != NULL && (*tp->t_fb->tfb_tcp_fb_init)(tp)) { /* The default stack cannot fail */ panic("Default stack initialization failed"); } } static bool tcp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp, const struct sockaddr *sa, void *ctx) { struct ip *iph; #ifdef INET6 struct ip6_hdr *ip6; #endif struct udphdr *uh; struct tcphdr *th; int thlen; uint16_t port; TCPSTAT_INC(tcps_tunneled_pkts); if ((m->m_flags & M_PKTHDR) == 0) { /* Can't handle one that is not a pkt hdr */ TCPSTAT_INC(tcps_tunneled_errs); goto out; } thlen = sizeof(struct tcphdr); if (m->m_len < off + sizeof(struct udphdr) + thlen && (m = m_pullup(m, off + sizeof(struct udphdr) + thlen)) == NULL) { TCPSTAT_INC(tcps_tunneled_errs); goto out; } iph = mtod(m, struct ip *); uh = (struct udphdr *)((caddr_t)iph + off); th = (struct tcphdr *)(uh + 1); thlen = th->th_off << 2; if (m->m_len < off + sizeof(struct udphdr) + thlen) { m = m_pullup(m, off + sizeof(struct udphdr) + thlen); if (m == NULL) { TCPSTAT_INC(tcps_tunneled_errs); goto out; } else { iph = mtod(m, struct ip *); uh = (struct udphdr *)((caddr_t)iph + off); th = (struct tcphdr *)(uh + 1); } } m->m_pkthdr.tcp_tun_port = port = uh->uh_sport; bcopy(th, uh, m->m_len - off); m->m_len -= sizeof(struct udphdr); m->m_pkthdr.len -= sizeof(struct udphdr); /* * We use the same algorithm for * both UDP and TCP for c-sum. So * the code in tcp_input will skip * the checksum. So we do nothing * with the flag (m->m_pkthdr.csum_flags). */ switch (iph->ip_v) { #ifdef INET case IPVERSION: iph->ip_len = htons(ntohs(iph->ip_len) - sizeof(struct udphdr)); tcp_input_with_port(&m, &off, IPPROTO_TCP, port); break; #endif #ifdef INET6 case IPV6_VERSION >> 4: ip6 = mtod(m, struct ip6_hdr *); ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct udphdr)); tcp6_input_with_port(&m, &off, IPPROTO_TCP, port); break; #endif default: goto out; break; } return (true); out: m_freem(m); return (true); } static int sysctl_net_inet_default_tcp_functions(SYSCTL_HANDLER_ARGS) { int error=ENOENT; struct tcp_function_set fs; struct tcp_function_block *blk; memset(&fs, 0, sizeof(fs)); rw_rlock(&tcp_function_lock); blk = find_tcp_fb_locked(tcp_func_set_ptr, NULL); if (blk) { /* Found him */ strcpy(fs.function_set_name, blk->tfb_tcp_block_name); fs.pcbcnt = blk->tfb_refcnt; } rw_runlock(&tcp_function_lock); error = sysctl_handle_string(oidp, fs.function_set_name, sizeof(fs.function_set_name), req); /* Check for error or no change */ if (error != 0 || req->newptr == NULL) return(error); rw_wlock(&tcp_function_lock); blk = find_tcp_functions_locked(&fs); if ((blk == NULL) || (blk->tfb_flags & TCP_FUNC_BEING_REMOVED)) { error = ENOENT; goto done; } tcp_func_set_ptr = blk; done: rw_wunlock(&tcp_function_lock); return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, functions_default, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_net_inet_default_tcp_functions, "A", "Set/get the default TCP functions"); static int sysctl_net_inet_list_available(SYSCTL_HANDLER_ARGS) { int error, cnt, linesz; struct tcp_function *f; char *buffer, *cp; size_t bufsz, outsz; bool alias; cnt = 0; rw_rlock(&tcp_function_lock); TAILQ_FOREACH(f, &t_functions, tf_next) { cnt++; } rw_runlock(&tcp_function_lock); bufsz = (cnt+2) * ((TCP_FUNCTION_NAME_LEN_MAX * 2) + 13) + 1; buffer = malloc(bufsz, M_TEMP, M_WAITOK); error = 0; cp = buffer; linesz = snprintf(cp, bufsz, "\n%-32s%c %-32s %s\n", "Stack", 'D', "Alias", "PCB count"); cp += linesz; bufsz -= linesz; outsz = linesz; rw_rlock(&tcp_function_lock); TAILQ_FOREACH(f, &t_functions, tf_next) { alias = (f->tf_name != f->tf_fb->tfb_tcp_block_name); linesz = snprintf(cp, bufsz, "%-32s%c %-32s %u\n", f->tf_fb->tfb_tcp_block_name, (f->tf_fb == tcp_func_set_ptr) ? '*' : ' ', alias ? f->tf_name : "-", f->tf_fb->tfb_refcnt); if (linesz >= bufsz) { error = EOVERFLOW; break; } cp += linesz; bufsz -= linesz; outsz += linesz; } rw_runlock(&tcp_function_lock); if (error == 0) error = sysctl_handle_string(oidp, buffer, outsz + 1, req); free(buffer, M_TEMP); return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, functions_available, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_net_inet_list_available, "A", "list available TCP Function sets"); VNET_DEFINE(int, tcp_udp_tunneling_port) = TCP_TUNNELING_PORT_DEFAULT; #ifdef INET VNET_DEFINE(struct socket *, udp4_tun_socket) = NULL; #define V_udp4_tun_socket VNET(udp4_tun_socket) #endif #ifdef INET6 VNET_DEFINE(struct socket *, udp6_tun_socket) = NULL; #define V_udp6_tun_socket VNET(udp6_tun_socket) #endif static void tcp_over_udp_stop(void) { /* * This function assumes sysctl caller holds inp_rinfo_lock() * for writing! */ #ifdef INET if (V_udp4_tun_socket != NULL) { soclose(V_udp4_tun_socket); V_udp4_tun_socket = NULL; } #endif #ifdef INET6 if (V_udp6_tun_socket != NULL) { soclose(V_udp6_tun_socket); V_udp6_tun_socket = NULL; } #endif } static int tcp_over_udp_start(void) { uint16_t port; int ret; #ifdef INET struct sockaddr_in sin; #endif #ifdef INET6 struct sockaddr_in6 sin6; #endif /* * This function assumes sysctl caller holds inp_info_rlock() * for writing! */ port = V_tcp_udp_tunneling_port; if (ntohs(port) == 0) { /* Must have a port set */ return (EINVAL); } #ifdef INET if (V_udp4_tun_socket != NULL) { /* Already running -- must stop first */ return (EALREADY); } #endif #ifdef INET6 if (V_udp6_tun_socket != NULL) { /* Already running -- must stop first */ return (EALREADY); } #endif #ifdef INET if ((ret = socreate(PF_INET, &V_udp4_tun_socket, SOCK_DGRAM, IPPROTO_UDP, curthread->td_ucred, curthread))) { tcp_over_udp_stop(); return (ret); } /* Call the special UDP hook. */ if ((ret = udp_set_kernel_tunneling(V_udp4_tun_socket, tcp_recv_udp_tunneled_packet, tcp_ctlinput_viaudp, NULL))) { tcp_over_udp_stop(); return (ret); } /* Ok, we have a socket, bind it to the port. */ memset(&sin, 0, sizeof(struct sockaddr_in)); sin.sin_len = sizeof(struct sockaddr_in); sin.sin_family = AF_INET; sin.sin_port = htons(port); if ((ret = sobind(V_udp4_tun_socket, (struct sockaddr *)&sin, curthread))) { tcp_over_udp_stop(); return (ret); } #endif #ifdef INET6 if ((ret = socreate(PF_INET6, &V_udp6_tun_socket, SOCK_DGRAM, IPPROTO_UDP, curthread->td_ucred, curthread))) { tcp_over_udp_stop(); return (ret); } /* Call the special UDP hook. */ if ((ret = udp_set_kernel_tunneling(V_udp6_tun_socket, tcp_recv_udp_tunneled_packet, tcp6_ctlinput_viaudp, NULL))) { tcp_over_udp_stop(); return (ret); } /* Ok, we have a socket, bind it to the port. */ memset(&sin6, 0, sizeof(struct sockaddr_in6)); sin6.sin6_len = sizeof(struct sockaddr_in6); sin6.sin6_family = AF_INET6; sin6.sin6_port = htons(port); if ((ret = sobind(V_udp6_tun_socket, (struct sockaddr *)&sin6, curthread))) { tcp_over_udp_stop(); return (ret); } #endif return (0); } static int sysctl_net_inet_tcp_udp_tunneling_port_check(SYSCTL_HANDLER_ARGS) { int error; uint32_t old, new; old = V_tcp_udp_tunneling_port; new = old; error = sysctl_handle_int(oidp, &new, 0, req); if ((error == 0) && (req->newptr != NULL)) { if ((new < TCP_TUNNELING_PORT_MIN) || (new > TCP_TUNNELING_PORT_MAX)) { error = EINVAL; } else { V_tcp_udp_tunneling_port = new; if (old != 0) { tcp_over_udp_stop(); } if (new != 0) { error = tcp_over_udp_start(); } } } return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, udp_tunneling_port, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, &VNET_NAME(tcp_udp_tunneling_port), 0, &sysctl_net_inet_tcp_udp_tunneling_port_check, "IU", "Tunneling port for tcp over udp"); VNET_DEFINE(int, tcp_udp_tunneling_overhead) = TCP_TUNNELING_OVERHEAD_DEFAULT; static int sysctl_net_inet_tcp_udp_tunneling_overhead_check(SYSCTL_HANDLER_ARGS) { int error, new; new = V_tcp_udp_tunneling_overhead; error = sysctl_handle_int(oidp, &new, 0, req); if (error == 0 && req->newptr) { if ((new < TCP_TUNNELING_OVERHEAD_MIN) || (new > TCP_TUNNELING_OVERHEAD_MAX)) error = EINVAL; else V_tcp_udp_tunneling_overhead = new; } return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, udp_tunneling_overhead, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, &VNET_NAME(tcp_udp_tunneling_overhead), 0, &sysctl_net_inet_tcp_udp_tunneling_overhead_check, "IU", "MSS reduction when using tcp over udp"); /* * Exports one (struct tcp_function_info) for each alias/name. */ static int sysctl_net_inet_list_func_info(SYSCTL_HANDLER_ARGS) { int cnt, error; struct tcp_function *f; struct tcp_function_info tfi; /* * We don't allow writes. */ if (req->newptr != NULL) return (EINVAL); /* * Wire the old buffer so we can directly copy the functions to * user space without dropping the lock. */ if (req->oldptr != NULL) { error = sysctl_wire_old_buffer(req, 0); if (error) return (error); } /* * Walk the list and copy out matching entries. If INVARIANTS * is compiled in, also walk the list to verify the length of * the list matches what we have recorded. */ rw_rlock(&tcp_function_lock); cnt = 0; #ifndef INVARIANTS if (req->oldptr == NULL) { cnt = tcp_fb_cnt; goto skip_loop; } #endif TAILQ_FOREACH(f, &t_functions, tf_next) { #ifdef INVARIANTS cnt++; #endif if (req->oldptr != NULL) { bzero(&tfi, sizeof(tfi)); tfi.tfi_refcnt = f->tf_fb->tfb_refcnt; tfi.tfi_id = f->tf_fb->tfb_id; (void)strlcpy(tfi.tfi_alias, f->tf_name, sizeof(tfi.tfi_alias)); (void)strlcpy(tfi.tfi_name, f->tf_fb->tfb_tcp_block_name, sizeof(tfi.tfi_name)); error = SYSCTL_OUT(req, &tfi, sizeof(tfi)); /* * Don't stop on error, as that is the * mechanism we use to accumulate length * information if the buffer was too short. */ } } KASSERT(cnt == tcp_fb_cnt, ("%s: cnt (%d) != tcp_fb_cnt (%d)", __func__, cnt, tcp_fb_cnt)); #ifndef INVARIANTS skip_loop: #endif rw_runlock(&tcp_function_lock); if (req->oldptr == NULL) error = SYSCTL_OUT(req, NULL, (cnt + 1) * sizeof(struct tcp_function_info)); return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, function_info, CTLTYPE_OPAQUE | CTLFLAG_SKIP | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_net_inet_list_func_info, "S,tcp_function_info", "List TCP function block name-to-ID mappings"); /* * tfb_tcp_handoff_ok() function for the default stack. * Note that we'll basically try to take all comers. */ static int tcp_default_handoff_ok(struct tcpcb *tp) { return (0); } /* * tfb_tcp_fb_init() function for the default stack. * * This handles making sure we have appropriate timers set if you are * transitioning a socket that has some amount of setup done. * * The init() fuction from the default can *never* return non-zero i.e. * it is required to always succeed since it is the stack of last resort! */ static int tcp_default_fb_init(struct tcpcb *tp) { struct socket *so; INP_WLOCK_ASSERT(tp->t_inpcb); KASSERT(tp->t_state >= 0 && tp->t_state < TCPS_TIME_WAIT, ("%s: connection %p in unexpected state %d", __func__, tp, tp->t_state)); /* * Nothing to do for ESTABLISHED or LISTEN states. And, we don't * know what to do for unexpected states (which includes TIME_WAIT). */ if (tp->t_state <= TCPS_LISTEN || tp->t_state >= TCPS_TIME_WAIT) return (0); /* * Make sure some kind of transmission timer is set if there is * outstanding data. */ so = tp->t_inpcb->inp_socket; if ((!TCPS_HAVEESTABLISHED(tp->t_state) || sbavail(&so->so_snd) || tp->snd_una != tp->snd_max) && !(tcp_timer_active(tp, TT_REXMT) || tcp_timer_active(tp, TT_PERSIST))) { /* * If the session has established and it looks like it should * be in the persist state, set the persist timer. Otherwise, * set the retransmit timer. */ if (TCPS_HAVEESTABLISHED(tp->t_state) && tp->snd_wnd == 0 && (int32_t)(tp->snd_nxt - tp->snd_una) < (int32_t)sbavail(&so->so_snd)) tcp_setpersist(tp); else tcp_timer_activate(tp, TT_REXMT, tp->t_rxtcur); } /* All non-embryonic sessions get a keepalive timer. */ if (!tcp_timer_active(tp, TT_KEEP)) tcp_timer_activate(tp, TT_KEEP, TCPS_HAVEESTABLISHED(tp->t_state) ? TP_KEEPIDLE(tp) : TP_KEEPINIT(tp)); /* * Make sure critical variables are initialized * if transitioning while in Recovery. */ if IN_FASTRECOVERY(tp->t_flags) { if (tp->sackhint.recover_fs == 0) tp->sackhint.recover_fs = max(1, tp->snd_nxt - tp->snd_una); } return (0); } /* * tfb_tcp_fb_fini() function for the default stack. * * This changes state as necessary (or prudent) to prepare for another stack * to assume responsibility for the connection. */ static void tcp_default_fb_fini(struct tcpcb *tp, int tcb_is_purged) { INP_WLOCK_ASSERT(tp->t_inpcb); return; } /* * Target size of TCP PCB hash tables. Must be a power of two. * * Note that this can be overridden by the kernel environment * variable net.inet.tcp.tcbhashsize */ #ifndef TCBHASHSIZE #define TCBHASHSIZE 0 #endif /* * XXX * Callouts should be moved into struct tcp directly. They are currently * separate because the tcpcb structure is exported to userland for sysctl * parsing purposes, which do not know about callouts. */ struct tcpcb_mem { struct tcpcb tcb; struct tcp_timer tt; struct cc_var ccv; #ifdef TCP_HHOOK struct osd osd; #endif }; VNET_DEFINE_STATIC(uma_zone_t, tcpcb_zone); #define V_tcpcb_zone VNET(tcpcb_zone) MALLOC_DEFINE(M_TCPLOG, "tcplog", "TCP address and flags print buffers"); MALLOC_DEFINE(M_TCPFUNCTIONS, "tcpfunc", "TCP function set memory"); static struct mtx isn_mtx; #define ISN_LOCK_INIT() mtx_init(&isn_mtx, "isn_mtx", NULL, MTX_DEF) #define ISN_LOCK() mtx_lock(&isn_mtx) #define ISN_UNLOCK() mtx_unlock(&isn_mtx) INPCBSTORAGE_DEFINE(tcpcbstor, "tcpinp", "tcp_inpcb", "tcp", "tcphash"); /* * Take a value and get the next power of 2 that doesn't overflow. * Used to size the tcp_inpcb hash buckets. */ static int maketcp_hashsize(int size) { int hashsize; /* * auto tune. * get the next power of 2 higher than maxsockets. */ hashsize = 1 << fls(size); /* catch overflow, and just go one power of 2 smaller */ if (hashsize < size) { hashsize = 1 << (fls(size) - 1); } return (hashsize); } static volatile int next_tcp_stack_id = 1; /* * Register a TCP function block with the name provided in the names * array. (Note that this function does NOT automatically register * blk->tfb_tcp_block_name as a stack name. Therefore, you should * explicitly include blk->tfb_tcp_block_name in the list of names if * you wish to register the stack with that name.) * * Either all name registrations will succeed or all will fail. If * a name registration fails, the function will update the num_names * argument to point to the array index of the name that encountered * the failure. * * Returns 0 on success, or an error code on failure. */ int register_tcp_functions_as_names(struct tcp_function_block *blk, int wait, const char *names[], int *num_names) { struct tcp_function *n; struct tcp_function_set fs; int error, i; KASSERT(names != NULL && *num_names > 0, ("%s: Called with 0-length name list", __func__)); KASSERT(names != NULL, ("%s: Called with NULL name list", __func__)); KASSERT(rw_initialized(&tcp_function_lock), ("%s: called too early", __func__)); if ((blk->tfb_tcp_output == NULL) || (blk->tfb_tcp_do_segment == NULL) || (blk->tfb_tcp_ctloutput == NULL) || (strlen(blk->tfb_tcp_block_name) == 0)) { /* * These functions are required and you * need a name. */ *num_names = 0; return (EINVAL); } if (blk->tfb_tcp_timer_stop_all || blk->tfb_tcp_timer_activate || blk->tfb_tcp_timer_active || blk->tfb_tcp_timer_stop) { /* * If you define one timer function you * must have them all. */ if ((blk->tfb_tcp_timer_stop_all == NULL) || (blk->tfb_tcp_timer_activate == NULL) || (blk->tfb_tcp_timer_active == NULL) || (blk->tfb_tcp_timer_stop == NULL)) { *num_names = 0; return (EINVAL); } } if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { *num_names = 0; return (EINVAL); } refcount_init(&blk->tfb_refcnt, 0); blk->tfb_id = atomic_fetchadd_int(&next_tcp_stack_id, 1); for (i = 0; i < *num_names; i++) { n = malloc(sizeof(struct tcp_function), M_TCPFUNCTIONS, wait); if (n == NULL) { error = ENOMEM; goto cleanup; } n->tf_fb = blk; (void)strlcpy(fs.function_set_name, names[i], sizeof(fs.function_set_name)); rw_wlock(&tcp_function_lock); if (find_tcp_functions_locked(&fs) != NULL) { /* Duplicate name space not allowed */ rw_wunlock(&tcp_function_lock); free(n, M_TCPFUNCTIONS); error = EALREADY; goto cleanup; } (void)strlcpy(n->tf_name, names[i], sizeof(n->tf_name)); TAILQ_INSERT_TAIL(&t_functions, n, tf_next); tcp_fb_cnt++; rw_wunlock(&tcp_function_lock); } return(0); cleanup: /* * Deregister the names we just added. Because registration failed * for names[i], we don't need to deregister that name. */ *num_names = i; rw_wlock(&tcp_function_lock); while (--i >= 0) { TAILQ_FOREACH(n, &t_functions, tf_next) { if (!strncmp(n->tf_name, names[i], TCP_FUNCTION_NAME_LEN_MAX)) { TAILQ_REMOVE(&t_functions, n, tf_next); tcp_fb_cnt--; n->tf_fb = NULL; free(n, M_TCPFUNCTIONS); break; } } } rw_wunlock(&tcp_function_lock); return (error); } /* * Register a TCP function block using the name provided in the name * argument. * * Returns 0 on success, or an error code on failure. */ int register_tcp_functions_as_name(struct tcp_function_block *blk, const char *name, int wait) { const char *name_list[1]; int num_names, rv; num_names = 1; if (name != NULL) name_list[0] = name; else name_list[0] = blk->tfb_tcp_block_name; rv = register_tcp_functions_as_names(blk, wait, name_list, &num_names); return (rv); } /* * Register a TCP function block using the name defined in * blk->tfb_tcp_block_name. * * Returns 0 on success, or an error code on failure. */ int register_tcp_functions(struct tcp_function_block *blk, int wait) { return (register_tcp_functions_as_name(blk, NULL, wait)); } /* * Deregister all names associated with a function block. This * functionally removes the function block from use within the system. * * When called with a true quiesce argument, mark the function block * as being removed so no more stacks will use it and determine * whether the removal would succeed. * * When called with a false quiesce argument, actually attempt the * removal. * * When called with a force argument, attempt to switch all TCBs to * use the default stack instead of returning EBUSY. * * Returns 0 on success (or if the removal would succeed, or an error * code on failure. */ int deregister_tcp_functions(struct tcp_function_block *blk, bool quiesce, bool force) { struct tcp_function *f; if (blk == &tcp_def_funcblk) { /* You can't un-register the default */ return (EPERM); } rw_wlock(&tcp_function_lock); if (blk == tcp_func_set_ptr) { /* You can't free the current default */ rw_wunlock(&tcp_function_lock); return (EBUSY); } /* Mark the block so no more stacks can use it. */ blk->tfb_flags |= TCP_FUNC_BEING_REMOVED; /* * If TCBs are still attached to the stack, attempt to switch them * to the default stack. */ if (force && blk->tfb_refcnt) { struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_tcbinfo, INPLOOKUP_WLOCKPCB); struct inpcb *inp; struct tcpcb *tp; VNET_ITERATOR_DECL(vnet_iter); rw_wunlock(&tcp_function_lock); VNET_LIST_RLOCK(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); while ((inp = inp_next(&inpi)) != NULL) { if (inp->inp_flags & INP_TIMEWAIT) continue; tp = intotcpcb(inp); if (tp == NULL || tp->t_fb != blk) continue; tcp_switch_back_to_default(tp); } CURVNET_RESTORE(); } VNET_LIST_RUNLOCK(); rw_wlock(&tcp_function_lock); } if (blk->tfb_refcnt) { /* TCBs still attached. */ rw_wunlock(&tcp_function_lock); return (EBUSY); } if (quiesce) { /* Skip removal. */ rw_wunlock(&tcp_function_lock); return (0); } /* Remove any function names that map to this function block. */ while (find_tcp_fb_locked(blk, &f) != NULL) { TAILQ_REMOVE(&t_functions, f, tf_next); tcp_fb_cnt--; f->tf_fb = NULL; free(f, M_TCPFUNCTIONS); } rw_wunlock(&tcp_function_lock); return (0); } static void tcp_drain(void) { struct epoch_tracker et; VNET_ITERATOR_DECL(vnet_iter); if (!do_tcpdrain) return; NET_EPOCH_ENTER(et); VNET_LIST_RLOCK_NOSLEEP(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_tcbinfo, INPLOOKUP_WLOCKPCB); struct inpcb *inpb; struct tcpcb *tcpb; /* * Walk the tcpbs, if existing, and flush the reassembly queue, * if there is one... * XXX: The "Net/3" implementation doesn't imply that the TCP * reassembly queue should be flushed, but in a situation * where we're really low on mbufs, this is potentially * useful. */ while ((inpb = inp_next(&inpi)) != NULL) { if (inpb->inp_flags & INP_TIMEWAIT) continue; if ((tcpb = intotcpcb(inpb)) != NULL) { tcp_reass_flush(tcpb); tcp_clean_sackreport(tcpb); #ifdef TCP_BLACKBOX tcp_log_drain(tcpb); #endif #ifdef TCPPCAP if (tcp_pcap_aggressive_free) { /* Free the TCP PCAP queues. */ tcp_pcap_drain(&(tcpb->t_inpkts)); tcp_pcap_drain(&(tcpb->t_outpkts)); } #endif } } CURVNET_RESTORE(); } VNET_LIST_RUNLOCK_NOSLEEP(); NET_EPOCH_EXIT(et); } static void tcp_vnet_init(void *arg __unused) { #ifdef TCP_HHOOK if (hhook_head_register(HHOOK_TYPE_TCP, HHOOK_TCP_EST_IN, &V_tcp_hhh[HHOOK_TCP_EST_IN], HHOOK_NOWAIT|HHOOK_HEADISINVNET) != 0) printf("%s: WARNING: unable to register helper hook\n", __func__); if (hhook_head_register(HHOOK_TYPE_TCP, HHOOK_TCP_EST_OUT, &V_tcp_hhh[HHOOK_TCP_EST_OUT], HHOOK_NOWAIT|HHOOK_HEADISINVNET) != 0) printf("%s: WARNING: unable to register helper hook\n", __func__); #endif #ifdef STATS if (tcp_stats_init()) printf("%s: WARNING: unable to initialise TCP stats\n", __func__); #endif in_pcbinfo_init(&V_tcbinfo, &tcpcbstor, tcp_tcbhashsize, tcp_tcbhashsize); /* * These have to be type stable for the benefit of the timers. */ V_tcpcb_zone = uma_zcreate("tcpcb", sizeof(struct tcpcb_mem), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); uma_zone_set_max(V_tcpcb_zone, maxsockets); uma_zone_set_warning(V_tcpcb_zone, "kern.ipc.maxsockets limit reached"); tcp_tw_init(); syncache_init(); tcp_hc_init(); TUNABLE_INT_FETCH("net.inet.tcp.sack.enable", &V_tcp_do_sack); V_sack_hole_zone = uma_zcreate("sackhole", sizeof(struct sackhole), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); tcp_fastopen_init(); COUNTER_ARRAY_ALLOC(V_tcps_states, TCP_NSTATES, M_WAITOK); VNET_PCPUSTAT_ALLOC(tcpstat, M_WAITOK); V_tcp_msl = TCPTV_MSL; } VNET_SYSINIT(tcp_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, tcp_vnet_init, NULL); static void tcp_init(void *arg __unused) { const char *tcbhash_tuneable; int hashsize; tcp_reass_global_init(); /* XXX virtualize those below? */ tcp_delacktime = TCPTV_DELACK; tcp_keepinit = TCPTV_KEEP_INIT; tcp_keepidle = TCPTV_KEEP_IDLE; tcp_keepintvl = TCPTV_KEEPINTVL; tcp_maxpersistidle = TCPTV_KEEP_IDLE; tcp_rexmit_initial = TCPTV_RTOBASE; if (tcp_rexmit_initial < 1) tcp_rexmit_initial = 1; tcp_rexmit_min = TCPTV_MIN; if (tcp_rexmit_min < 1) tcp_rexmit_min = 1; tcp_persmin = TCPTV_PERSMIN; tcp_persmax = TCPTV_PERSMAX; tcp_rexmit_slop = TCPTV_CPU_VAR; tcp_finwait2_timeout = TCPTV_FINWAIT2_TIMEOUT; /* Setup the tcp function block list */ TAILQ_INIT(&t_functions); rw_init(&tcp_function_lock, "tcp_func_lock"); register_tcp_functions(&tcp_def_funcblk, M_WAITOK); #ifdef TCP_BLACKBOX /* Initialize the TCP logging data. */ tcp_log_init(); #endif arc4rand(&V_ts_offset_secret, sizeof(V_ts_offset_secret), 0); if (tcp_soreceive_stream) { #ifdef INET tcp_protosw.pr_soreceive = soreceive_stream; #endif #ifdef INET6 tcp6_protosw.pr_soreceive = soreceive_stream; #endif /* INET6 */ } #ifdef INET6 max_protohdr_grow(sizeof(struct ip6_hdr) + sizeof(struct tcphdr)); #else /* INET6 */ max_protohdr_grow(sizeof(struct tcpiphdr)); #endif /* INET6 */ ISN_LOCK_INIT(); EVENTHANDLER_REGISTER(shutdown_pre_sync, tcp_fini, NULL, SHUTDOWN_PRI_DEFAULT); EVENTHANDLER_REGISTER(vm_lowmem, tcp_drain, NULL, LOWMEM_PRI_DEFAULT); EVENTHANDLER_REGISTER(mbuf_lowmem, tcp_drain, NULL, LOWMEM_PRI_DEFAULT); tcp_inp_lro_direct_queue = counter_u64_alloc(M_WAITOK); tcp_inp_lro_wokeup_queue = counter_u64_alloc(M_WAITOK); tcp_inp_lro_compressed = counter_u64_alloc(M_WAITOK); tcp_inp_lro_locks_taken = counter_u64_alloc(M_WAITOK); tcp_extra_mbuf = counter_u64_alloc(M_WAITOK); tcp_would_have_but = counter_u64_alloc(M_WAITOK); tcp_comp_total = counter_u64_alloc(M_WAITOK); tcp_uncomp_total = counter_u64_alloc(M_WAITOK); tcp_bad_csums = counter_u64_alloc(M_WAITOK); #ifdef TCPPCAP tcp_pcap_init(); #endif hashsize = TCBHASHSIZE; tcbhash_tuneable = "net.inet.tcp.tcbhashsize"; TUNABLE_INT_FETCH(tcbhash_tuneable, &hashsize); if (hashsize == 0) { /* * Auto tune the hash size based on maxsockets. * A perfect hash would have a 1:1 mapping * (hashsize = maxsockets) however it's been * suggested that O(2) average is better. */ hashsize = maketcp_hashsize(maxsockets / 4); /* * Our historical default is 512, * do not autotune lower than this. */ if (hashsize < 512) hashsize = 512; if (bootverbose) printf("%s: %s auto tuned to %d\n", __func__, tcbhash_tuneable, hashsize); } /* * We require a hashsize to be a power of two. * Previously if it was not a power of two we would just reset it * back to 512, which could be a nasty surprise if you did not notice * the error message. * Instead what we do is clip it to the closest power of two lower * than the specified hash value. */ if (!powerof2(hashsize)) { int oldhashsize = hashsize; hashsize = maketcp_hashsize(hashsize); /* prevent absurdly low value */ if (hashsize < 16) hashsize = 16; printf("%s: WARNING: TCB hash size not a power of 2, " "clipped from %d to %d.\n", __func__, oldhashsize, hashsize); } tcp_tcbhashsize = hashsize; #ifdef INET IPPROTO_REGISTER(IPPROTO_TCP, tcp_input, tcp_ctlinput); #endif #ifdef INET6 IP6PROTO_REGISTER(IPPROTO_TCP, tcp6_input, tcp6_ctlinput); #endif } SYSINIT(tcp_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, tcp_init, NULL); #ifdef VIMAGE static void tcp_destroy(void *unused __unused) { int n; #ifdef TCP_HHOOK int error; #endif /* * All our processes are gone, all our sockets should be cleaned * up, which means, we should be past the tcp_discardcb() calls. * Sleep to let all tcpcb timers really disappear and cleanup. */ for (;;) { INP_INFO_WLOCK(&V_tcbinfo); n = V_tcbinfo.ipi_count; INP_INFO_WUNLOCK(&V_tcbinfo); if (n == 0) break; pause("tcpdes", hz / 10); } tcp_hc_destroy(); syncache_destroy(); tcp_tw_destroy(); in_pcbinfo_destroy(&V_tcbinfo); /* tcp_discardcb() clears the sack_holes up. */ uma_zdestroy(V_sack_hole_zone); uma_zdestroy(V_tcpcb_zone); /* * Cannot free the zone until all tcpcbs are released as we attach * the allocations to them. */ tcp_fastopen_destroy(); COUNTER_ARRAY_FREE(V_tcps_states, TCP_NSTATES); VNET_PCPUSTAT_FREE(tcpstat); #ifdef TCP_HHOOK error = hhook_head_deregister(V_tcp_hhh[HHOOK_TCP_EST_IN]); if (error != 0) { printf("%s: WARNING: unable to deregister helper hook " "type=%d, id=%d: error %d returned\n", __func__, HHOOK_TYPE_TCP, HHOOK_TCP_EST_IN, error); } error = hhook_head_deregister(V_tcp_hhh[HHOOK_TCP_EST_OUT]); if (error != 0) { printf("%s: WARNING: unable to deregister helper hook " "type=%d, id=%d: error %d returned\n", __func__, HHOOK_TYPE_TCP, HHOOK_TCP_EST_OUT, error); } #endif } VNET_SYSUNINIT(tcp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, tcp_destroy, NULL); #endif void tcp_fini(void *xtp) { } /* * Fill in the IP and TCP headers for an outgoing packet, given the tcpcb. * tcp_template used to store this data in mbufs, but we now recopy it out * of the tcpcb each time to conserve mbufs. */ void tcpip_fillheaders(struct inpcb *inp, uint16_t port, void *ip_ptr, void *tcp_ptr) { struct tcphdr *th = (struct tcphdr *)tcp_ptr; INP_WLOCK_ASSERT(inp); #ifdef INET6 if ((inp->inp_vflag & INP_IPV6) != 0) { struct ip6_hdr *ip6; ip6 = (struct ip6_hdr *)ip_ptr; ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | (inp->inp_flow & IPV6_FLOWINFO_MASK); ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | (IPV6_VERSION & IPV6_VERSION_MASK); if (port == 0) ip6->ip6_nxt = IPPROTO_TCP; else ip6->ip6_nxt = IPPROTO_UDP; ip6->ip6_plen = htons(sizeof(struct tcphdr)); ip6->ip6_src = inp->in6p_laddr; ip6->ip6_dst = inp->in6p_faddr; } #endif /* INET6 */ #if defined(INET6) && defined(INET) else #endif #ifdef INET { struct ip *ip; ip = (struct ip *)ip_ptr; ip->ip_v = IPVERSION; ip->ip_hl = 5; ip->ip_tos = inp->inp_ip_tos; ip->ip_len = 0; ip->ip_id = 0; ip->ip_off = 0; ip->ip_ttl = inp->inp_ip_ttl; ip->ip_sum = 0; if (port == 0) ip->ip_p = IPPROTO_TCP; else ip->ip_p = IPPROTO_UDP; ip->ip_src = inp->inp_laddr; ip->ip_dst = inp->inp_faddr; } #endif /* INET */ th->th_sport = inp->inp_lport; th->th_dport = inp->inp_fport; th->th_seq = 0; th->th_ack = 0; th->th_off = 5; tcp_set_flags(th, 0); th->th_win = 0; th->th_urp = 0; th->th_sum = 0; /* in_pseudo() is called later for ipv4 */ } /* * Create template to be used to send tcp packets on a connection. * Allocates an mbuf and fills in a skeletal tcp/ip header. The only * use for this function is in keepalives, which use tcp_respond. */ struct tcptemp * tcpip_maketemplate(struct inpcb *inp) { struct tcptemp *t; t = malloc(sizeof(*t), M_TEMP, M_NOWAIT); if (t == NULL) return (NULL); tcpip_fillheaders(inp, 0, (void *)&t->tt_ipgen, (void *)&t->tt_t); return (t); } /* * Send a single message to the TCP at address specified by * the given TCP/IP header. If m == NULL, then we make a copy * of the tcpiphdr at th and send directly to the addressed host. * This is used to force keep alive messages out using the TCP * template for a connection. If flags are given then we send * a message back to the TCP which originated the segment th, * and discard the mbuf containing it and any other attached mbufs. * * In any case the ack and sequence number of the transmitted * segment are as specified by the parameters. * * NOTE: If m != NULL, then th must point to *inside* the mbuf. */ void tcp_respond(struct tcpcb *tp, void *ipgen, struct tcphdr *th, struct mbuf *m, tcp_seq ack, tcp_seq seq, int flags) { struct tcpopt to; struct inpcb *inp; struct ip *ip; struct mbuf *optm; struct udphdr *uh = NULL; struct tcphdr *nth; struct tcp_log_buffer *lgb; u_char *optp; #ifdef INET6 struct ip6_hdr *ip6; int isipv6; #endif /* INET6 */ int optlen, tlen, win, ulen; bool incl_opts; uint16_t port; int output_ret; #ifdef INVARIANTS int thflags = tcp_get_flags(th); #endif KASSERT(tp != NULL || m != NULL, ("tcp_respond: tp and m both NULL")); NET_EPOCH_ASSERT(); #ifdef INET6 isipv6 = ((struct ip *)ipgen)->ip_v == (IPV6_VERSION >> 4); ip6 = ipgen; #endif /* INET6 */ ip = ipgen; if (tp != NULL) { inp = tp->t_inpcb; KASSERT(inp != NULL, ("tcp control block w/o inpcb")); INP_LOCK_ASSERT(inp); } else inp = NULL; if (m != NULL) { #ifdef INET6 if (isipv6 && ip6 && (ip6->ip6_nxt == IPPROTO_UDP)) port = m->m_pkthdr.tcp_tun_port; else #endif if (ip && (ip->ip_p == IPPROTO_UDP)) port = m->m_pkthdr.tcp_tun_port; else port = 0; } else port = tp->t_port; incl_opts = false; win = 0; if (tp != NULL) { if (!(flags & TH_RST)) { win = sbspace(&inp->inp_socket->so_rcv); if (win > TCP_MAXWIN << tp->rcv_scale) win = TCP_MAXWIN << tp->rcv_scale; } if ((tp->t_flags & TF_NOOPT) == 0) incl_opts = true; } if (m == NULL) { m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) return; m->m_data += max_linkhdr; #ifdef INET6 if (isipv6) { bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(struct ip6_hdr)); ip6 = mtod(m, struct ip6_hdr *); nth = (struct tcphdr *)(ip6 + 1); if (port) { /* Insert a UDP header */ uh = (struct udphdr *)nth; uh->uh_sport = htons(V_tcp_udp_tunneling_port); uh->uh_dport = port; nth = (struct tcphdr *)(uh + 1); } } else #endif /* INET6 */ { bcopy((caddr_t)ip, mtod(m, caddr_t), sizeof(struct ip)); ip = mtod(m, struct ip *); nth = (struct tcphdr *)(ip + 1); if (port) { /* Insert a UDP header */ uh = (struct udphdr *)nth; uh->uh_sport = htons(V_tcp_udp_tunneling_port); uh->uh_dport = port; nth = (struct tcphdr *)(uh + 1); } } bcopy((caddr_t)th, (caddr_t)nth, sizeof(struct tcphdr)); flags = TH_ACK; } else if ((!M_WRITABLE(m)) || (port != 0)) { struct mbuf *n; /* Can't reuse 'm', allocate a new mbuf. */ n = m_gethdr(M_NOWAIT, MT_DATA); if (n == NULL) { m_freem(m); return; } if (!m_dup_pkthdr(n, m, M_NOWAIT)) { m_freem(m); m_freem(n); return; } n->m_data += max_linkhdr; /* m_len is set later */ #define xchg(a,b,type) { type t; t=a; a=b; b=t; } #ifdef INET6 if (isipv6) { bcopy((caddr_t)ip6, mtod(n, caddr_t), sizeof(struct ip6_hdr)); ip6 = mtod(n, struct ip6_hdr *); xchg(ip6->ip6_dst, ip6->ip6_src, struct in6_addr); nth = (struct tcphdr *)(ip6 + 1); if (port) { /* Insert a UDP header */ uh = (struct udphdr *)nth; uh->uh_sport = htons(V_tcp_udp_tunneling_port); uh->uh_dport = port; nth = (struct tcphdr *)(uh + 1); } } else #endif /* INET6 */ { bcopy((caddr_t)ip, mtod(n, caddr_t), sizeof(struct ip)); ip = mtod(n, struct ip *); xchg(ip->ip_dst.s_addr, ip->ip_src.s_addr, uint32_t); nth = (struct tcphdr *)(ip + 1); if (port) { /* Insert a UDP header */ uh = (struct udphdr *)nth; uh->uh_sport = htons(V_tcp_udp_tunneling_port); uh->uh_dport = port; nth = (struct tcphdr *)(uh + 1); } } bcopy((caddr_t)th, (caddr_t)nth, sizeof(struct tcphdr)); xchg(nth->th_dport, nth->th_sport, uint16_t); th = nth; m_freem(m); m = n; } else { /* * reuse the mbuf. * XXX MRT We inherit the FIB, which is lucky. */ m_freem(m->m_next); m->m_next = NULL; m->m_data = (caddr_t)ipgen; /* m_len is set later */ #ifdef INET6 if (isipv6) { xchg(ip6->ip6_dst, ip6->ip6_src, struct in6_addr); nth = (struct tcphdr *)(ip6 + 1); } else #endif /* INET6 */ { xchg(ip->ip_dst.s_addr, ip->ip_src.s_addr, uint32_t); nth = (struct tcphdr *)(ip + 1); } if (th != nth) { /* * this is usually a case when an extension header * exists between the IPv6 header and the * TCP header. */ nth->th_sport = th->th_sport; nth->th_dport = th->th_dport; } xchg(nth->th_dport, nth->th_sport, uint16_t); #undef xchg } tlen = 0; #ifdef INET6 if (isipv6) tlen = sizeof (struct ip6_hdr) + sizeof (struct tcphdr); #endif #if defined(INET) && defined(INET6) else #endif #ifdef INET tlen = sizeof (struct tcpiphdr); #endif if (port) tlen += sizeof (struct udphdr); #ifdef INVARIANTS m->m_len = 0; KASSERT(M_TRAILINGSPACE(m) >= tlen, ("Not enough trailing space for message (m=%p, need=%d, have=%ld)", m, tlen, (long)M_TRAILINGSPACE(m))); #endif m->m_len = tlen; to.to_flags = 0; if (incl_opts) { /* Make sure we have room. */ if (M_TRAILINGSPACE(m) < TCP_MAXOLEN) { m->m_next = m_get(M_NOWAIT, MT_DATA); if (m->m_next) { optp = mtod(m->m_next, u_char *); optm = m->m_next; } else incl_opts = false; } else { optp = (u_char *) (nth + 1); optm = m; } } if (incl_opts) { /* Timestamps. */ if (tp->t_flags & TF_RCVD_TSTMP) { to.to_tsval = tcp_ts_getticks() + tp->ts_offset; to.to_tsecr = tp->ts_recent; to.to_flags |= TOF_TS; } #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) /* TCP-MD5 (RFC2385). */ if (tp->t_flags & TF_SIGNATURE) to.to_flags |= TOF_SIGNATURE; #endif /* Add the options. */ tlen += optlen = tcp_addoptions(&to, optp); /* Update m_len in the correct mbuf. */ optm->m_len += optlen; } else optlen = 0; #ifdef INET6 if (isipv6) { if (uh) { ulen = tlen - sizeof(struct ip6_hdr); uh->uh_ulen = htons(ulen); } ip6->ip6_flow = 0; ip6->ip6_vfc = IPV6_VERSION; if (port) ip6->ip6_nxt = IPPROTO_UDP; else ip6->ip6_nxt = IPPROTO_TCP; ip6->ip6_plen = htons(tlen - sizeof(*ip6)); } #endif #if defined(INET) && defined(INET6) else #endif #ifdef INET { if (uh) { ulen = tlen - sizeof(struct ip); uh->uh_ulen = htons(ulen); } ip->ip_len = htons(tlen); ip->ip_ttl = V_ip_defttl; if (port) { ip->ip_p = IPPROTO_UDP; } else { ip->ip_p = IPPROTO_TCP; } if (V_path_mtu_discovery) ip->ip_off |= htons(IP_DF); } #endif m->m_pkthdr.len = tlen; m->m_pkthdr.rcvif = NULL; #ifdef MAC if (inp != NULL) { /* * Packet is associated with a socket, so allow the * label of the response to reflect the socket label. */ INP_LOCK_ASSERT(inp); mac_inpcb_create_mbuf(inp, m); } else { /* * Packet is not associated with a socket, so possibly * update the label in place. */ mac_netinet_tcp_reply(m); } #endif nth->th_seq = htonl(seq); nth->th_ack = htonl(ack); nth->th_off = (sizeof (struct tcphdr) + optlen) >> 2; tcp_set_flags(nth, flags); if (tp != NULL) nth->th_win = htons((u_short) (win >> tp->rcv_scale)); else nth->th_win = htons((u_short)win); nth->th_urp = 0; #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (to.to_flags & TOF_SIGNATURE) { if (!TCPMD5_ENABLED() || TCPMD5_OUTPUT(m, nth, to.to_signature) != 0) { m_freem(m); return; } } #endif #ifdef INET6 if (isipv6) { if (port) { m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); uh->uh_sum = in6_cksum_pseudo(ip6, ulen, IPPROTO_UDP, 0); nth->th_sum = 0; } else { m->m_pkthdr.csum_flags = CSUM_TCP_IPV6; m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); nth->th_sum = in6_cksum_pseudo(ip6, tlen - sizeof(struct ip6_hdr), IPPROTO_TCP, 0); } ip6->ip6_hlim = in6_selecthlim(tp != NULL ? tp->t_inpcb : NULL, NULL); } #endif /* INET6 */ #if defined(INET6) && defined(INET) else #endif #ifdef INET { if (port) { uh->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htons(ulen + IPPROTO_UDP)); m->m_pkthdr.csum_flags = CSUM_UDP; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); nth->th_sum = 0; } else { m->m_pkthdr.csum_flags = CSUM_TCP; m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); nth->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htons((u_short)(tlen - sizeof(struct ip) + ip->ip_p))); } } #endif /* INET */ #ifdef TCPDEBUG if (tp == NULL || (inp->inp_socket->so_options & SO_DEBUG)) tcp_trace(TA_OUTPUT, 0, tp, mtod(m, void *), th, 0); #endif TCP_PROBE3(debug__output, tp, th, m); if (flags & TH_RST) TCP_PROBE5(accept__refused, NULL, NULL, m, tp, nth); lgb = NULL; if ((tp != NULL) && (tp->t_logstate != TCP_LOG_STATE_OFF)) { if (INP_WLOCKED(inp)) { union tcp_log_stackspecific log; struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = tp->t_inpcb->inp_in_hpts; log.u_bbr.flex8 = 4; log.u_bbr.pkts_out = tp->t_maxseg; log.u_bbr.timeStamp = tcp_get_usecs(&tv); log.u_bbr.delivered = 0; lgb = tcp_log_event_(tp, nth, NULL, NULL, TCP_LOG_OUT, ERRNO_UNK, 0, &log, false, NULL, NULL, 0, &tv); } else { /* * We can not log the packet, since we only own the * read lock, but a write lock is needed. The read lock * is not upgraded to a write lock, since only getting * the read lock was done intentionally to improve the * handling of SYN flooding attacks. * This happens only for pure SYN segments received in * the initial CLOSED state, or received in a more * advanced state than listen and the UDP encapsulation * port is unexpected. * The incoming SYN segments do not really belong to * the TCP connection and the handling does not change * the state of the TCP connection. Therefore, the * sending of the RST segments is not logged. Please * note that also the incoming SYN segments are not * logged. * * The following code ensures that the above description * is and stays correct. */ KASSERT((thflags & (TH_ACK|TH_SYN)) == TH_SYN && (tp->t_state == TCPS_CLOSED || (tp->t_state > TCPS_LISTEN && tp->t_port != port)), ("%s: Logging of TCP segment with flags 0x%b and " "UDP encapsulation port %u skipped in state %s", __func__, thflags, PRINT_TH_FLAGS, ntohs(port), tcpstates[tp->t_state])); } } if (flags & TH_ACK) TCPSTAT_INC(tcps_sndacks); else if (flags & (TH_SYN|TH_FIN|TH_RST)) TCPSTAT_INC(tcps_sndctrl); TCPSTAT_INC(tcps_sndtotal); #ifdef INET6 if (isipv6) { TCP_PROBE5(send, NULL, tp, ip6, tp, nth); output_ret = ip6_output(m, NULL, NULL, 0, NULL, NULL, inp); } #endif /* INET6 */ #if defined(INET) && defined(INET6) else #endif #ifdef INET { TCP_PROBE5(send, NULL, tp, ip, tp, nth); output_ret = ip_output(m, NULL, NULL, 0, NULL, inp); } #endif if (lgb != NULL) lgb->tlb_errno = output_ret; } /* * Create a new TCP control block, making an * empty reassembly queue and hooking it to the argument * protocol control block. The `inp' parameter must have * come from the zone allocator set up in tcp_init(). */ struct tcpcb * tcp_newtcpcb(struct inpcb *inp) { struct tcpcb_mem *tm; struct tcpcb *tp; #ifdef INET6 int isipv6 = (inp->inp_vflag & INP_IPV6) != 0; #endif /* INET6 */ tm = uma_zalloc(V_tcpcb_zone, M_NOWAIT | M_ZERO); if (tm == NULL) return (NULL); tp = &tm->tcb; /* Initialise cc_var struct for this tcpcb. */ tp->ccv = &tm->ccv; tp->ccv->type = IPPROTO_TCP; tp->ccv->ccvc.tcp = tp; rw_rlock(&tcp_function_lock); tp->t_fb = tcp_func_set_ptr; refcount_acquire(&tp->t_fb->tfb_refcnt); rw_runlock(&tcp_function_lock); /* * Use the current system default CC algorithm. */ cc_attach(tp, CC_DEFAULT_ALGO()); /* * The tcpcb will hold a reference on its inpcb until tcp_discardcb() * is called. */ in_pcbref(inp); /* Reference for tcpcb */ tp->t_inpcb = inp; if (CC_ALGO(tp)->cb_init != NULL) if (CC_ALGO(tp)->cb_init(tp->ccv, NULL) > 0) { cc_detach(tp); if (tp->t_fb->tfb_tcp_fb_fini) (*tp->t_fb->tfb_tcp_fb_fini)(tp, 1); in_pcbrele_wlocked(inp); refcount_release(&tp->t_fb->tfb_refcnt); uma_zfree(V_tcpcb_zone, tm); return (NULL); } #ifdef TCP_HHOOK tp->osd = &tm->osd; if (khelp_init_osd(HELPER_CLASS_TCP, tp->osd)) { if (tp->t_fb->tfb_tcp_fb_fini) (*tp->t_fb->tfb_tcp_fb_fini)(tp, 1); in_pcbrele_wlocked(inp); refcount_release(&tp->t_fb->tfb_refcnt); uma_zfree(V_tcpcb_zone, tm); return (NULL); } #endif #ifdef VIMAGE tp->t_vnet = inp->inp_vnet; #endif tp->t_timers = &tm->tt; TAILQ_INIT(&tp->t_segq); tp->t_maxseg = #ifdef INET6 isipv6 ? V_tcp_v6mssdflt : #endif /* INET6 */ V_tcp_mssdflt; /* Set up our timeouts. */ callout_init(&tp->t_timers->tt_rexmt, 1); callout_init(&tp->t_timers->tt_persist, 1); callout_init(&tp->t_timers->tt_keep, 1); callout_init(&tp->t_timers->tt_2msl, 1); callout_init(&tp->t_timers->tt_delack, 1); switch (V_tcp_do_rfc1323) { case 0: break; default: case 1: tp->t_flags = (TF_REQ_SCALE|TF_REQ_TSTMP); break; case 2: tp->t_flags = TF_REQ_SCALE; break; case 3: tp->t_flags = TF_REQ_TSTMP; break; } if (V_tcp_do_sack) tp->t_flags |= TF_SACK_PERMIT; TAILQ_INIT(&tp->snd_holes); /* * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no * rtt estimate. Set rttvar so that srtt + 4 * rttvar gives * reasonable initial retransmit time. */ tp->t_srtt = TCPTV_SRTTBASE; tp->t_rttvar = ((tcp_rexmit_initial - TCPTV_SRTTBASE) << TCP_RTTVAR_SHIFT) / 4; tp->t_rttmin = tcp_rexmit_min; tp->t_rxtcur = tcp_rexmit_initial; tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT; tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT; tp->t_rcvtime = ticks; /* * IPv4 TTL initialization is necessary for an IPv6 socket as well, * because the socket may be bound to an IPv6 wildcard address, * which may match an IPv4-mapped IPv6 address. */ inp->inp_ip_ttl = V_ip_defttl; inp->inp_ppcb = tp; #ifdef TCPPCAP /* * Init the TCP PCAP queues. */ tcp_pcap_tcpcb_init(tp); #endif #ifdef TCP_BLACKBOX /* Initialize the per-TCPCB log data. */ tcp_log_tcpcbinit(tp); #endif tp->t_pacing_rate = -1; if (tp->t_fb->tfb_tcp_fb_init) { if ((*tp->t_fb->tfb_tcp_fb_init)(tp)) { refcount_release(&tp->t_fb->tfb_refcnt); in_pcbrele_wlocked(inp); uma_zfree(V_tcpcb_zone, tm); return (NULL); } } #ifdef STATS if (V_tcp_perconn_stats_enable == 1) tp->t_stats = stats_blob_alloc(V_tcp_perconn_stats_dflt_tpl, 0); #endif if (V_tcp_do_lrd) tp->t_flags |= TF_LRD; return (tp); /* XXX */ } /* * Drop a TCP connection, reporting * the specified error. If connection is synchronized, * then send a RST to peer. */ struct tcpcb * tcp_drop(struct tcpcb *tp, int errno) { struct socket *so = tp->t_inpcb->inp_socket; NET_EPOCH_ASSERT(); INP_WLOCK_ASSERT(tp->t_inpcb); if (TCPS_HAVERCVDSYN(tp->t_state)) { tcp_state_change(tp, TCPS_CLOSED); /* Don't use tcp_output() here due to possible recursion. */ (void)tcp_output_nodrop(tp); TCPSTAT_INC(tcps_drops); } else TCPSTAT_INC(tcps_conndrops); if (errno == ETIMEDOUT && tp->t_softerror) errno = tp->t_softerror; so->so_error = errno; return (tcp_close(tp)); } void tcp_discardcb(struct tcpcb *tp) { struct inpcb *inp = tp->t_inpcb; INP_WLOCK_ASSERT(inp); /* * Make sure that all of our timers are stopped before we delete the * PCB. * * If stopping a timer fails, we schedule a discard function in same * callout, and the last discard function called will take care of * deleting the tcpcb. */ tp->t_timers->tt_draincnt = 0; tcp_timer_stop(tp, TT_REXMT); tcp_timer_stop(tp, TT_PERSIST); tcp_timer_stop(tp, TT_KEEP); tcp_timer_stop(tp, TT_2MSL); tcp_timer_stop(tp, TT_DELACK); if (tp->t_fb->tfb_tcp_timer_stop_all) { /* * Call the stop-all function of the methods, * this function should call the tcp_timer_stop() * method with each of the function specific timeouts. * That stop will be called via the tfb_tcp_timer_stop() * which should use the async drain function of the * callout system (see tcp_var.h). */ tp->t_fb->tfb_tcp_timer_stop_all(tp); } /* free the reassembly queue, if any */ tcp_reass_flush(tp); #ifdef TCP_OFFLOAD /* Disconnect offload device, if any. */ if (tp->t_flags & TF_TOE) tcp_offload_detach(tp); #endif tcp_free_sackholes(tp); #ifdef TCPPCAP /* Free the TCP PCAP queues. */ tcp_pcap_drain(&(tp->t_inpkts)); tcp_pcap_drain(&(tp->t_outpkts)); #endif /* Allow the CC algorithm to clean up after itself. */ if (CC_ALGO(tp)->cb_destroy != NULL) CC_ALGO(tp)->cb_destroy(tp->ccv); CC_DATA(tp) = NULL; /* Detach from the CC algorithm */ cc_detach(tp); #ifdef TCP_HHOOK khelp_destroy_osd(tp->osd); #endif #ifdef STATS stats_blob_destroy(tp->t_stats); #endif CC_ALGO(tp) = NULL; inp->inp_ppcb = NULL; if (tp->t_timers->tt_draincnt == 0) { bool released __diagused; released = tcp_freecb(tp); KASSERT(!released, ("%s: inp %p should not have been released " "here", __func__, inp)); } } bool tcp_freecb(struct tcpcb *tp) { struct inpcb *inp = tp->t_inpcb; struct socket *so = inp->inp_socket; #ifdef INET6 bool isipv6 = (inp->inp_vflag & INP_IPV6) != 0; #endif INP_WLOCK_ASSERT(inp); MPASS(tp->t_timers->tt_draincnt == 0); /* We own the last reference on tcpcb, let's free it. */ #ifdef TCP_BLACKBOX tcp_log_tcpcbfini(tp); #endif TCPSTATES_DEC(tp->t_state); if (tp->t_fb->tfb_tcp_fb_fini) (*tp->t_fb->tfb_tcp_fb_fini)(tp, 1); /* * If we got enough samples through the srtt filter, * save the rtt and rttvar in the routing entry. * 'Enough' is arbitrarily defined as 4 rtt samples. * 4 samples is enough for the srtt filter to converge * to within enough % of the correct value; fewer samples * and we could save a bogus rtt. The danger is not high * as tcp quickly recovers from everything. * XXX: Works very well but needs some more statistics! * * XXXRRS: Updating must be after the stack fini() since * that may be converting some internal representation of * say srtt etc into the general one used by other stacks. * Lets also at least protect against the so being NULL * as RW stated below. */ if ((tp->t_rttupdated >= 4) && (so != NULL)) { struct hc_metrics_lite metrics; uint32_t ssthresh; bzero(&metrics, sizeof(metrics)); /* * Update the ssthresh always when the conditions below * are satisfied. This gives us better new start value * for the congestion avoidance for new connections. * ssthresh is only set if packet loss occurred on a session. * * XXXRW: 'so' may be NULL here, and/or socket buffer may be * being torn down. Ideally this code would not use 'so'. */ ssthresh = tp->snd_ssthresh; if (ssthresh != 0 && ssthresh < so->so_snd.sb_hiwat / 2) { /* * convert the limit from user data bytes to * packets then to packet data bytes. */ ssthresh = (ssthresh + tp->t_maxseg / 2) / tp->t_maxseg; if (ssthresh < 2) ssthresh = 2; ssthresh *= (tp->t_maxseg + #ifdef INET6 (isipv6 ? sizeof (struct ip6_hdr) + sizeof (struct tcphdr) : #endif sizeof (struct tcpiphdr) #ifdef INET6 ) #endif ); } else ssthresh = 0; metrics.rmx_ssthresh = ssthresh; metrics.rmx_rtt = tp->t_srtt; metrics.rmx_rttvar = tp->t_rttvar; metrics.rmx_cwnd = tp->snd_cwnd; metrics.rmx_sendpipe = 0; metrics.rmx_recvpipe = 0; tcp_hc_update(&inp->inp_inc, &metrics); } refcount_release(&tp->t_fb->tfb_refcnt); uma_zfree(V_tcpcb_zone, tp); return (in_pcbrele_wlocked(inp)); } /* * Attempt to close a TCP control block, marking it as dropped, and freeing * the socket if we hold the only reference. */ struct tcpcb * tcp_close(struct tcpcb *tp) { struct inpcb *inp = tp->t_inpcb; struct socket *so; INP_WLOCK_ASSERT(inp); #ifdef TCP_OFFLOAD if (tp->t_state == TCPS_LISTEN) tcp_offload_listen_stop(tp); #endif /* * This releases the TFO pending counter resource for TFO listen * sockets as well as passively-created TFO sockets that transition * from SYN_RECEIVED to CLOSED. */ if (tp->t_tfo_pending) { tcp_fastopen_decrement_counter(tp->t_tfo_pending); tp->t_tfo_pending = NULL; } #ifdef TCPHPTS tcp_hpts_remove(inp); #endif in_pcbdrop(inp); TCPSTAT_INC(tcps_closed); if (tp->t_state != TCPS_CLOSED) tcp_state_change(tp, TCPS_CLOSED); KASSERT(inp->inp_socket != NULL, ("tcp_close: inp_socket NULL")); so = inp->inp_socket; soisdisconnected(so); if (inp->inp_flags & INP_SOCKREF) { inp->inp_flags &= ~INP_SOCKREF; INP_WUNLOCK(inp); sorele(so); return (NULL); } return (tp); } /* * Notify a tcp user of an asynchronous error; * store error as soft error, but wake up user * (for now, won't do anything until can select for soft error). * * Do not wake up user since there currently is no mechanism for * reporting soft errors (yet - a kqueue filter may be added). */ static struct inpcb * tcp_notify(struct inpcb *inp, int error) { struct tcpcb *tp; INP_WLOCK_ASSERT(inp); if ((inp->inp_flags & INP_TIMEWAIT) || (inp->inp_flags & INP_DROPPED)) return (inp); tp = intotcpcb(inp); KASSERT(tp != NULL, ("tcp_notify: tp == NULL")); /* * Ignore some errors if we are hooked up. * If connection hasn't completed, has retransmitted several times, * and receives a second error, give up now. This is better * than waiting a long time to establish a connection that * can never complete. */ if (tp->t_state == TCPS_ESTABLISHED && (error == EHOSTUNREACH || error == ENETUNREACH || error == EHOSTDOWN)) { if (inp->inp_route.ro_nh) { NH_FREE(inp->inp_route.ro_nh); inp->inp_route.ro_nh = (struct nhop_object *)NULL; } return (inp); } else if (tp->t_state < TCPS_ESTABLISHED && tp->t_rxtshift > 3 && tp->t_softerror) { tp = tcp_drop(tp, error); if (tp != NULL) return (inp); else return (NULL); } else { tp->t_softerror = error; return (inp); } #if 0 wakeup( &so->so_timeo); sorwakeup(so); sowwakeup(so); #endif } static int tcp_pcblist(SYSCTL_HANDLER_ARGS) { struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_tcbinfo, INPLOOKUP_RLOCKPCB); struct xinpgen xig; struct inpcb *inp; int error; if (req->newptr != NULL) return (EPERM); if (req->oldptr == NULL) { int n; n = V_tcbinfo.ipi_count + counter_u64_fetch(V_tcps_states[TCPS_SYN_RECEIVED]); n += imax(n / 8, 10); req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xtcpcb); return (0); } if ((error = sysctl_wire_old_buffer(req, 0)) != 0) return (error); bzero(&xig, sizeof(xig)); xig.xig_len = sizeof xig; xig.xig_count = V_tcbinfo.ipi_count + counter_u64_fetch(V_tcps_states[TCPS_SYN_RECEIVED]); xig.xig_gen = V_tcbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; error = SYSCTL_OUT(req, &xig, sizeof xig); if (error) return (error); error = syncache_pcblist(req); if (error) return (error); while ((inp = inp_next(&inpi)) != NULL) { if (inp->inp_gencnt <= xig.xig_gen) { int crerr; /* * XXX: This use of cr_cansee(), introduced with * TCP state changes, is not quite right, but for * now, better than nothing. */ if (inp->inp_flags & INP_TIMEWAIT) { if (intotw(inp) != NULL) crerr = cr_cansee(req->td->td_ucred, intotw(inp)->tw_cred); else crerr = EINVAL; /* Skip this inp. */ } else crerr = cr_canseeinpcb(req->td->td_ucred, inp); if (crerr == 0) { struct xtcpcb xt; tcp_inptoxtp(inp, &xt); error = SYSCTL_OUT(req, &xt, sizeof xt); if (error) { INP_RUNLOCK(inp); break; } else continue; } } } if (!error) { /* * Give the user an updated idea of our state. * If the generation differs from what we told * her before, she knows that something happened * while we were processing this request, and it * might be necessary to retry. */ xig.xig_gen = V_tcbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; xig.xig_count = V_tcbinfo.ipi_count + counter_u64_fetch(V_tcps_states[TCPS_SYN_RECEIVED]); error = SYSCTL_OUT(req, &xig, sizeof xig); } return (error); } SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_NEEDGIANT, NULL, 0, tcp_pcblist, "S,xtcpcb", "List of active TCP connections"); #ifdef INET static int tcp_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in addrs[2]; struct epoch_tracker et; struct inpcb *inp; int error; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); NET_EPOCH_ENTER(et); inp = in_pcblookup(&V_tcbinfo, addrs[1].sin_addr, addrs[1].sin_port, addrs[0].sin_addr, addrs[0].sin_port, INPLOOKUP_RLOCKPCB, NULL); NET_EPOCH_EXIT(et); if (inp != NULL) { if (inp->inp_socket == NULL) error = ENOENT; if (error == 0) error = cr_canseeinpcb(req->td->td_ucred, inp); if (error == 0) cru2x(inp->inp_cred, &xuc); INP_RUNLOCK(inp); } else error = ENOENT; if (error == 0) error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_NEEDGIANT, 0, 0, tcp_getcred, "S,xucred", "Get the xucred of a TCP connection"); #endif /* INET */ #ifdef INET6 static int tcp6_getcred(SYSCTL_HANDLER_ARGS) { struct epoch_tracker et; struct xucred xuc; struct sockaddr_in6 addrs[2]; struct inpcb *inp; int error; #ifdef INET int mapped = 0; #endif error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { return (error); } if (IN6_IS_ADDR_V4MAPPED(&addrs[0].sin6_addr)) { #ifdef INET if (IN6_IS_ADDR_V4MAPPED(&addrs[1].sin6_addr)) mapped = 1; else #endif return (EINVAL); } NET_EPOCH_ENTER(et); #ifdef INET if (mapped == 1) inp = in_pcblookup(&V_tcbinfo, *(struct in_addr *)&addrs[1].sin6_addr.s6_addr[12], addrs[1].sin6_port, *(struct in_addr *)&addrs[0].sin6_addr.s6_addr[12], addrs[0].sin6_port, INPLOOKUP_RLOCKPCB, NULL); else #endif inp = in6_pcblookup(&V_tcbinfo, &addrs[1].sin6_addr, addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, INPLOOKUP_RLOCKPCB, NULL); NET_EPOCH_EXIT(et); if (inp != NULL) { if (inp->inp_socket == NULL) error = ENOENT; if (error == 0) error = cr_canseeinpcb(req->td->td_ucred, inp); if (error == 0) cru2x(inp->inp_cred, &xuc); INP_RUNLOCK(inp); } else error = ENOENT; if (error == 0) error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); return (error); } SYSCTL_PROC(_net_inet6_tcp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_NEEDGIANT, 0, 0, tcp6_getcred, "S,xucred", "Get the xucred of a TCP6 connection"); #endif /* INET6 */ #ifdef INET /* Path MTU to try next when a fragmentation-needed message is received. */ static inline int tcp_next_pmtu(const struct icmp *icp, const struct ip *ip) { int mtu = ntohs(icp->icmp_nextmtu); /* If no alternative MTU was proposed, try the next smaller one. */ if (!mtu) mtu = ip_next_mtu(ntohs(ip->ip_len), 1); if (mtu < V_tcp_minmss + sizeof(struct tcpiphdr)) mtu = V_tcp_minmss + sizeof(struct tcpiphdr); return (mtu); } static void tcp_ctlinput_with_port(int cmd, struct sockaddr_in *sin, struct ip *ip, uint16_t port) { struct tcphdr *th; struct inpcb *inp; struct tcpcb *tp; struct inpcb *(*notify)(struct inpcb *, int) = tcp_notify; struct icmp *icp; struct in_conninfo inc; tcp_seq icmp_tcp_seq; int mtu; - if (cmd == PRC_MSGSIZE) + switch (cmd) { + case PRC_MSGSIZE: notify = tcp_mtudisc_notify; - else if (V_icmp_may_rst && (cmd == PRC_UNREACH_ADMIN_PROHIB || - cmd == PRC_UNREACH_PORT || cmd == PRC_UNREACH_PROTOCOL || - cmd == PRC_TIMXCEED_INTRANS) && ip) - notify = tcp_drop_syn_sent; - - /* - * Hostdead is ugly because it goes linearly through all PCBs. - * XXX: We never get this from ICMP, otherwise it makes an - * excellent DoS attack on machines with many connections. - */ - else if (cmd == PRC_HOSTDEAD) - ip = NULL; - else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) - return; + break; + case PRC_UNREACH_PORT: + case PRC_UNREACH_PROTOCOL: + case PRC_TIMXCEED_INTRANS: + case PRC_UNREACH_ADMIN_PROHIB: + if (V_icmp_may_rst) + notify = tcp_drop_syn_sent; + break; + } - if (ip == NULL) { - in_pcbnotifyall(&V_tcbinfo, sin->sin_addr, inetctlerrmap[cmd], - notify); + if (inetctlerrmap[cmd] == 0) return; - } icp = (struct icmp *)((caddr_t)ip - offsetof(struct icmp, icmp_ip)); th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + icmp_tcp_seq = th->th_seq; inp = in_pcblookup(&V_tcbinfo, sin->sin_addr, th->th_dport, ip->ip_src, th->th_sport, INPLOOKUP_WLOCKPCB, NULL); - if (inp != NULL && PRC_IS_REDIRECT(cmd)) { - /* signal EHOSTDOWN, as it flushes the cached route */ - inp = (*notify)(inp, EHOSTDOWN); - goto out; - } - icmp_tcp_seq = th->th_seq; if (inp != NULL) { if (!(inp->inp_flags & INP_TIMEWAIT) && !(inp->inp_flags & INP_DROPPED) && !(inp->inp_socket == NULL)) { tp = intotcpcb(inp); #ifdef TCP_OFFLOAD if (tp->t_flags & TF_TOE && cmd == PRC_MSGSIZE) { /* * MTU discovery for offloaded connections. Let * the TOE driver verify seq# and process it. */ mtu = tcp_next_pmtu(icp, ip); tcp_offload_pmtu_update(tp, icmp_tcp_seq, mtu); goto out; } #endif if (tp->t_port != port) { goto out; } if (SEQ_GEQ(ntohl(icmp_tcp_seq), tp->snd_una) && SEQ_LT(ntohl(icmp_tcp_seq), tp->snd_max)) { if (cmd == PRC_MSGSIZE) { /* * MTU discovery: we got a needfrag and * will potentially try a lower MTU. */ mtu = tcp_next_pmtu(icp, ip); /* * Only process the offered MTU if it * is smaller than the current one. */ if (mtu < tp->t_maxseg + sizeof(struct tcpiphdr)) { bzero(&inc, sizeof(inc)); inc.inc_faddr = sin->sin_addr; inc.inc_fibnum = inp->inp_inc.inc_fibnum; tcp_hc_updatemtu(&inc, mtu); inp = tcp_mtudisc(inp, mtu); } } else inp = (*notify)(inp, inetctlerrmap[cmd]); } } } else { bzero(&inc, sizeof(inc)); inc.inc_fport = th->th_dport; inc.inc_lport = th->th_sport; inc.inc_faddr = sin->sin_addr; inc.inc_laddr = ip->ip_src; syncache_unreach(&inc, icmp_tcp_seq, port); } out: if (inp != NULL) INP_WUNLOCK(inp); } static void tcp_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *ip) { tcp_ctlinput_with_port(cmd, sin, ip, htons(0)); } static void tcp_ctlinput_viaudp(int cmd, struct sockaddr *sa, void *vip, void *unused) { /* Its a tunneled TCP over UDP icmp */ struct ip *outer_ip, *inner_ip; struct icmp *icmp; struct udphdr *udp; struct tcphdr *th, ttemp; int i_hlen, o_len; uint16_t port; inner_ip = (struct ip *)vip; icmp = (struct icmp *)((caddr_t)inner_ip - (sizeof(struct icmp) - sizeof(struct ip))); outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip)); i_hlen = inner_ip->ip_hl << 2; o_len = ntohs(outer_ip->ip_len); if (o_len < (sizeof(struct ip) + 8 + i_hlen + sizeof(struct udphdr) + offsetof(struct tcphdr, th_ack))) { /* Not enough data present */ return; } /* Ok lets strip out the inner udphdr header by copying up on top of it the tcp hdr */ udp = (struct udphdr *)(((caddr_t)inner_ip) + i_hlen); if (ntohs(udp->uh_sport) != V_tcp_udp_tunneling_port) { return; } port = udp->uh_dport; th = (struct tcphdr *)(udp + 1); memcpy(&ttemp, th, sizeof(struct tcphdr)); memcpy(udp, &ttemp, sizeof(struct tcphdr)); /* Now adjust down the size of the outer IP header */ o_len -= sizeof(struct udphdr); outer_ip->ip_len = htons(o_len); /* Now call in to the normal handling code */ tcp_ctlinput_with_port(cmd, (struct sockaddr_in *)sa, vip, port); } #endif /* INET */ #ifdef INET6 static inline int tcp6_next_pmtu(const struct icmp6_hdr *icmp6) { int mtu = ntohl(icmp6->icmp6_mtu); /* * If no alternative MTU was proposed, or the proposed MTU was too * small, set to the min. */ if (mtu < IPV6_MMTU) mtu = IPV6_MMTU - 8; /* XXXNP: what is the adjustment for? */ return (mtu); } static void tcp6_ctlinput_with_port(int cmd, struct sockaddr_in6 *sin6, struct ip6ctlparam *ip6cp, uint16_t port) { struct in6_addr *dst; struct inpcb *(*notify)(struct inpcb *, int) = tcp_notify; struct ip6_hdr *ip6; struct mbuf *m; struct inpcb *inp; struct tcpcb *tp; struct icmp6_hdr *icmp6; - const struct sockaddr_in6 *sa6_src = NULL; struct in_conninfo inc; struct tcp_ports { uint16_t th_sport; uint16_t th_dport; } t_ports; tcp_seq icmp_tcp_seq; unsigned int mtu; unsigned int off; - /* if the parameter is from icmp6, decode it. */ - if (ip6cp != NULL) { - icmp6 = ip6cp->ip6c_icmp6; - m = ip6cp->ip6c_m; - ip6 = ip6cp->ip6c_ip6; - off = ip6cp->ip6c_off; - sa6_src = ip6cp->ip6c_src; - dst = ip6cp->ip6c_finaldst; - } else { - m = NULL; - ip6 = NULL; - off = 0; /* fool gcc */ - sa6_src = &sa6_any; - dst = NULL; - } + icmp6 = ip6cp->ip6c_icmp6; + m = ip6cp->ip6c_m; + ip6 = ip6cp->ip6c_ip6; + off = ip6cp->ip6c_off; + dst = ip6cp->ip6c_finaldst; - if (cmd == PRC_MSGSIZE) + switch (cmd) { + case PRC_MSGSIZE: notify = tcp_mtudisc_notify; - else if (V_icmp_may_rst && (cmd == PRC_UNREACH_ADMIN_PROHIB || - cmd == PRC_UNREACH_PORT || cmd == PRC_UNREACH_PROTOCOL || - cmd == PRC_TIMXCEED_INTRANS) && ip6 != NULL) - notify = tcp_drop_syn_sent; - - /* - * Hostdead is ugly because it goes linearly through all PCBs. - * XXX: We never get this from ICMP, otherwise it makes an - * excellent DoS attack on machines with many connections. - */ - else if (cmd == PRC_HOSTDEAD) - ip6 = NULL; - else if ((unsigned)cmd >= PRC_NCMDS || inet6ctlerrmap[cmd] == 0) - return; + break; + case PRC_UNREACH_ADMIN_PROHIB: + case PRC_UNREACH_PORT: + case PRC_UNREACH_PROTOCOL: + case PRC_TIMXCEED_INTRANS: + if (V_icmp_may_rst) + notify = tcp_drop_syn_sent; + break; + } - if (ip6 == NULL) { - in6_pcbnotify(&V_tcbinfo, sin6, 0, sa6_src, 0, cmd, NULL, - notify); + if (inet6ctlerrmap[cmd] == 0) return; - } /* Check if we can safely get the ports from the tcp hdr */ if (m == NULL || (m->m_pkthdr.len < (int32_t) (off + sizeof(struct tcp_ports)))) { return; } bzero(&t_ports, sizeof(struct tcp_ports)); m_copydata(m, off, sizeof(struct tcp_ports), (caddr_t)&t_ports); inp = in6_pcblookup(&V_tcbinfo, &ip6->ip6_dst, t_ports.th_dport, &ip6->ip6_src, t_ports.th_sport, INPLOOKUP_WLOCKPCB, NULL); - if (inp != NULL && PRC_IS_REDIRECT(cmd)) { - /* signal EHOSTDOWN, as it flushes the cached route */ - inp = (*notify)(inp, EHOSTDOWN); - goto out; - } off += sizeof(struct tcp_ports); if (m->m_pkthdr.len < (int32_t) (off + sizeof(tcp_seq))) { goto out; } m_copydata(m, off, sizeof(tcp_seq), (caddr_t)&icmp_tcp_seq); if (inp != NULL) { if (!(inp->inp_flags & INP_TIMEWAIT) && !(inp->inp_flags & INP_DROPPED) && !(inp->inp_socket == NULL)) { tp = intotcpcb(inp); #ifdef TCP_OFFLOAD if (tp->t_flags & TF_TOE && cmd == PRC_MSGSIZE) { /* MTU discovery for offloaded connections. */ mtu = tcp6_next_pmtu(icmp6); tcp_offload_pmtu_update(tp, icmp_tcp_seq, mtu); goto out; } #endif if (tp->t_port != port) { goto out; } if (SEQ_GEQ(ntohl(icmp_tcp_seq), tp->snd_una) && SEQ_LT(ntohl(icmp_tcp_seq), tp->snd_max)) { if (cmd == PRC_MSGSIZE) { /* * MTU discovery: * If we got a needfrag set the MTU * in the route to the suggested new * value (if given) and then notify. */ mtu = tcp6_next_pmtu(icmp6); bzero(&inc, sizeof(inc)); inc.inc_fibnum = M_GETFIB(m); inc.inc_flags |= INC_ISIPV6; inc.inc6_faddr = *dst; if (in6_setscope(&inc.inc6_faddr, m->m_pkthdr.rcvif, NULL)) goto out; /* * Only process the offered MTU if it * is smaller than the current one. */ if (mtu < tp->t_maxseg + sizeof (struct tcphdr) + sizeof (struct ip6_hdr)) { tcp_hc_updatemtu(&inc, mtu); tcp_mtudisc(inp, mtu); ICMP6STAT_INC(icp6s_pmtuchg); } } else inp = (*notify)(inp, inet6ctlerrmap[cmd]); } } } else { bzero(&inc, sizeof(inc)); inc.inc_fibnum = M_GETFIB(m); inc.inc_flags |= INC_ISIPV6; inc.inc_fport = t_ports.th_dport; inc.inc_lport = t_ports.th_sport; inc.inc6_faddr = *dst; inc.inc6_laddr = ip6->ip6_src; syncache_unreach(&inc, icmp_tcp_seq, port); } out: if (inp != NULL) INP_WUNLOCK(inp); } static void tcp6_ctlinput(int cmd, struct sockaddr_in6 *sin6, struct ip6ctlparam *ctl) { tcp6_ctlinput_with_port(cmd, sin6, ctl, htons(0)); } static void tcp6_ctlinput_viaudp(int cmd, struct sockaddr *sa, void *d, void *unused) { struct ip6ctlparam *ip6cp; struct mbuf *m; struct udphdr *udp; uint16_t port; ip6cp = (struct ip6ctlparam *)d; m = m_pulldown(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(struct udphdr), NULL); if (m == NULL) { return; } udp = mtod(m, struct udphdr *); if (ntohs(udp->uh_sport) != V_tcp_udp_tunneling_port) { return; } port = udp->uh_dport; m_adj(m, sizeof(struct udphdr)); if ((m->m_flags & M_PKTHDR) == 0) { ip6cp->ip6c_m->m_pkthdr.len -= sizeof(struct udphdr); } /* Now call in to the normal handling code */ tcp6_ctlinput_with_port(cmd, (struct sockaddr_in6 *)sa, ip6cp, port); } #endif /* INET6 */ static uint32_t tcp_keyed_hash(struct in_conninfo *inc, u_char *key, u_int len) { SIPHASH_CTX ctx; uint32_t hash[2]; KASSERT(len >= SIPHASH_KEY_LENGTH, ("%s: keylen %u too short ", __func__, len)); SipHash24_Init(&ctx); SipHash_SetKey(&ctx, (uint8_t *)key); SipHash_Update(&ctx, &inc->inc_fport, sizeof(uint16_t)); SipHash_Update(&ctx, &inc->inc_lport, sizeof(uint16_t)); switch (inc->inc_flags & INC_ISIPV6) { #ifdef INET case 0: SipHash_Update(&ctx, &inc->inc_faddr, sizeof(struct in_addr)); SipHash_Update(&ctx, &inc->inc_laddr, sizeof(struct in_addr)); break; #endif #ifdef INET6 case INC_ISIPV6: SipHash_Update(&ctx, &inc->inc6_faddr, sizeof(struct in6_addr)); SipHash_Update(&ctx, &inc->inc6_laddr, sizeof(struct in6_addr)); break; #endif } SipHash_Final((uint8_t *)hash, &ctx); return (hash[0] ^ hash[1]); } uint32_t tcp_new_ts_offset(struct in_conninfo *inc) { struct in_conninfo inc_store, *local_inc; if (!V_tcp_ts_offset_per_conn) { memcpy(&inc_store, inc, sizeof(struct in_conninfo)); inc_store.inc_lport = 0; inc_store.inc_fport = 0; local_inc = &inc_store; } else { local_inc = inc; } return (tcp_keyed_hash(local_inc, V_ts_offset_secret, sizeof(V_ts_offset_secret))); } /* * Following is where TCP initial sequence number generation occurs. * * There are two places where we must use initial sequence numbers: * 1. In SYN-ACK packets. * 2. In SYN packets. * * All ISNs for SYN-ACK packets are generated by the syncache. See * tcp_syncache.c for details. * * The ISNs in SYN packets must be monotonic; TIME_WAIT recycling * depends on this property. In addition, these ISNs should be * unguessable so as to prevent connection hijacking. To satisfy * the requirements of this situation, the algorithm outlined in * RFC 1948 is used, with only small modifications. * * Implementation details: * * Time is based off the system timer, and is corrected so that it * increases by one megabyte per second. This allows for proper * recycling on high speed LANs while still leaving over an hour * before rollover. * * As reading the *exact* system time is too expensive to be done * whenever setting up a TCP connection, we increment the time * offset in two ways. First, a small random positive increment * is added to isn_offset for each connection that is set up. * Second, the function tcp_isn_tick fires once per clock tick * and increments isn_offset as necessary so that sequence numbers * are incremented at approximately ISN_BYTES_PER_SECOND. The * random positive increments serve only to ensure that the same * exact sequence number is never sent out twice (as could otherwise * happen when a port is recycled in less than the system tick * interval.) * * net.inet.tcp.isn_reseed_interval controls the number of seconds * between seeding of isn_secret. This is normally set to zero, * as reseeding should not be necessary. * * Locking of the global variables isn_secret, isn_last_reseed, isn_offset, * isn_offset_old, and isn_ctx is performed using the ISN lock. In * general, this means holding an exclusive (write) lock. */ #define ISN_BYTES_PER_SECOND 1048576 #define ISN_STATIC_INCREMENT 4096 #define ISN_RANDOM_INCREMENT (4096 - 1) #define ISN_SECRET_LENGTH SIPHASH_KEY_LENGTH VNET_DEFINE_STATIC(u_char, isn_secret[ISN_SECRET_LENGTH]); VNET_DEFINE_STATIC(int, isn_last); VNET_DEFINE_STATIC(int, isn_last_reseed); VNET_DEFINE_STATIC(u_int32_t, isn_offset); VNET_DEFINE_STATIC(u_int32_t, isn_offset_old); #define V_isn_secret VNET(isn_secret) #define V_isn_last VNET(isn_last) #define V_isn_last_reseed VNET(isn_last_reseed) #define V_isn_offset VNET(isn_offset) #define V_isn_offset_old VNET(isn_offset_old) tcp_seq tcp_new_isn(struct in_conninfo *inc) { tcp_seq new_isn; u_int32_t projected_offset; ISN_LOCK(); /* Seed if this is the first use, reseed if requested. */ if ((V_isn_last_reseed == 0) || ((V_tcp_isn_reseed_interval > 0) && (((u_int)V_isn_last_reseed + (u_int)V_tcp_isn_reseed_interval*hz) < (u_int)ticks))) { arc4rand(&V_isn_secret, sizeof(V_isn_secret), 0); V_isn_last_reseed = ticks; } /* Compute the hash and return the ISN. */ new_isn = (tcp_seq)tcp_keyed_hash(inc, V_isn_secret, sizeof(V_isn_secret)); V_isn_offset += ISN_STATIC_INCREMENT + (arc4random() & ISN_RANDOM_INCREMENT); if (ticks != V_isn_last) { projected_offset = V_isn_offset_old + ISN_BYTES_PER_SECOND / hz * (ticks - V_isn_last); if (SEQ_GT(projected_offset, V_isn_offset)) V_isn_offset = projected_offset; V_isn_offset_old = V_isn_offset; V_isn_last = ticks; } new_isn += V_isn_offset; ISN_UNLOCK(); return (new_isn); } /* * When a specific ICMP unreachable message is received and the * connection state is SYN-SENT, drop the connection. This behavior * is controlled by the icmp_may_rst sysctl. */ struct inpcb * tcp_drop_syn_sent(struct inpcb *inp, int errno) { struct tcpcb *tp; NET_EPOCH_ASSERT(); INP_WLOCK_ASSERT(inp); if ((inp->inp_flags & INP_TIMEWAIT) || (inp->inp_flags & INP_DROPPED)) return (inp); tp = intotcpcb(inp); if (tp->t_state != TCPS_SYN_SENT) return (inp); if (IS_FASTOPEN(tp->t_flags)) tcp_fastopen_disable_path(tp); tp = tcp_drop(tp, errno); if (tp != NULL) return (inp); else return (NULL); } /* * When `need fragmentation' ICMP is received, update our idea of the MSS * based on the new value. Also nudge TCP to send something, since we * know the packet we just sent was dropped. * This duplicates some code in the tcp_mss() function in tcp_input.c. */ static struct inpcb * tcp_mtudisc_notify(struct inpcb *inp, int error) { return (tcp_mtudisc(inp, -1)); } static struct inpcb * tcp_mtudisc(struct inpcb *inp, int mtuoffer) { struct tcpcb *tp; struct socket *so; INP_WLOCK_ASSERT(inp); if ((inp->inp_flags & INP_TIMEWAIT) || (inp->inp_flags & INP_DROPPED)) return (inp); tp = intotcpcb(inp); KASSERT(tp != NULL, ("tcp_mtudisc: tp == NULL")); tcp_mss_update(tp, -1, mtuoffer, NULL, NULL); so = inp->inp_socket; SOCKBUF_LOCK(&so->so_snd); /* If the mss is larger than the socket buffer, decrease the mss. */ if (so->so_snd.sb_hiwat < tp->t_maxseg) tp->t_maxseg = so->so_snd.sb_hiwat; SOCKBUF_UNLOCK(&so->so_snd); TCPSTAT_INC(tcps_mturesent); tp->t_rtttime = 0; tp->snd_nxt = tp->snd_una; tcp_free_sackholes(tp); tp->snd_recover = tp->snd_max; if (tp->t_flags & TF_SACK_PERMIT) EXIT_FASTRECOVERY(tp->t_flags); if (tp->t_fb->tfb_tcp_mtu_chg != NULL) { /* * Conceptually the snd_nxt setting * and freeing sack holes should * be done by the default stacks * own tfb_tcp_mtu_chg(). */ tp->t_fb->tfb_tcp_mtu_chg(tp); } if (tcp_output(tp) < 0) return (NULL); else return (inp); } #ifdef INET /* * Look-up the routing entry to the peer of this inpcb. If no route * is found and it cannot be allocated, then return 0. This routine * is called by TCP routines that access the rmx structure and by * tcp_mss_update to get the peer/interface MTU. */ uint32_t tcp_maxmtu(struct in_conninfo *inc, struct tcp_ifcap *cap) { struct nhop_object *nh; struct ifnet *ifp; uint32_t maxmtu = 0; KASSERT(inc != NULL, ("tcp_maxmtu with NULL in_conninfo pointer")); if (inc->inc_faddr.s_addr != INADDR_ANY) { nh = fib4_lookup(inc->inc_fibnum, inc->inc_faddr, 0, NHR_NONE, 0); if (nh == NULL) return (0); ifp = nh->nh_ifp; maxmtu = nh->nh_mtu; /* Report additional interface capabilities. */ if (cap != NULL) { if (ifp->if_capenable & IFCAP_TSO4 && ifp->if_hwassist & CSUM_TSO) { cap->ifcap |= CSUM_TSO; cap->tsomax = ifp->if_hw_tsomax; cap->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; cap->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; } } } return (maxmtu); } #endif /* INET */ #ifdef INET6 uint32_t tcp_maxmtu6(struct in_conninfo *inc, struct tcp_ifcap *cap) { struct nhop_object *nh; struct in6_addr dst6; uint32_t scopeid; struct ifnet *ifp; uint32_t maxmtu = 0; KASSERT(inc != NULL, ("tcp_maxmtu6 with NULL in_conninfo pointer")); if (inc->inc_flags & INC_IPV6MINMTU) return (IPV6_MMTU); if (!IN6_IS_ADDR_UNSPECIFIED(&inc->inc6_faddr)) { in6_splitscope(&inc->inc6_faddr, &dst6, &scopeid); nh = fib6_lookup(inc->inc_fibnum, &dst6, scopeid, NHR_NONE, 0); if (nh == NULL) return (0); ifp = nh->nh_ifp; maxmtu = nh->nh_mtu; /* Report additional interface capabilities. */ if (cap != NULL) { if (ifp->if_capenable & IFCAP_TSO6 && ifp->if_hwassist & CSUM_TSO) { cap->ifcap |= CSUM_TSO; cap->tsomax = ifp->if_hw_tsomax; cap->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; cap->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; } } } return (maxmtu); } /* * Handle setsockopt(IPV6_USE_MIN_MTU) by a TCP stack. * * XXXGL: we are updating inpcb here with INC_IPV6MINMTU flag. * The right place to do that is ip6_setpktopt() that has just been * executed. By the way it just filled ip6po_minmtu for us. */ void tcp6_use_min_mtu(struct tcpcb *tp) { struct inpcb *inp = tp->t_inpcb; INP_WLOCK_ASSERT(inp); /* * In case of the IPV6_USE_MIN_MTU socket * option, the INC_IPV6MINMTU flag to announce * a corresponding MSS during the initial * handshake. If the TCP connection is not in * the front states, just reduce the MSS being * used. This avoids the sending of TCP * segments which will be fragmented at the * IPv6 layer. */ inp->inp_inc.inc_flags |= INC_IPV6MINMTU; if ((tp->t_state >= TCPS_SYN_SENT) && (inp->inp_inc.inc_flags & INC_ISIPV6)) { struct ip6_pktopts *opt; opt = inp->in6p_outputopts; if (opt != NULL && opt->ip6po_minmtu == IP6PO_MINMTU_ALL && tp->t_maxseg > TCP6_MSS) tp->t_maxseg = TCP6_MSS; } } #endif /* INET6 */ /* * Calculate effective SMSS per RFC5681 definition for a given TCP * connection at its current state, taking into account SACK and etc. */ u_int tcp_maxseg(const struct tcpcb *tp) { u_int optlen; if (tp->t_flags & TF_NOOPT) return (tp->t_maxseg); /* * Here we have a simplified code from tcp_addoptions(), * without a proper loop, and having most of paddings hardcoded. * We might make mistakes with padding here in some edge cases, * but this is harmless, since result of tcp_maxseg() is used * only in cwnd and ssthresh estimations. */ if (TCPS_HAVEESTABLISHED(tp->t_state)) { if (tp->t_flags & TF_RCVD_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = 0; #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PADTCPOLEN(TCPOLEN_SIGNATURE); #endif if ((tp->t_flags & TF_SACK_PERMIT) && tp->rcv_numsacks > 0) { optlen += TCPOLEN_SACKHDR; optlen += tp->rcv_numsacks * TCPOLEN_SACK; optlen = PADTCPOLEN(optlen); } } else { if (tp->t_flags & TF_REQ_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = PADTCPOLEN(TCPOLEN_MAXSEG); if (tp->t_flags & TF_REQ_SCALE) optlen += PADTCPOLEN(TCPOLEN_WINDOW); #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PADTCPOLEN(TCPOLEN_SIGNATURE); #endif if (tp->t_flags & TF_SACK_PERMIT) optlen += PADTCPOLEN(TCPOLEN_SACK_PERMITTED); } #undef PAD optlen = min(optlen, TCP_MAXOLEN); return (tp->t_maxseg - optlen); } u_int tcp_fixed_maxseg(const struct tcpcb *tp) { int optlen; if (tp->t_flags & TF_NOOPT) return (tp->t_maxseg); /* * Here we have a simplified code from tcp_addoptions(), * without a proper loop, and having most of paddings hardcoded. * We only consider fixed options that we would send every * time I.e. SACK is not considered. This is important * for cc modules to figure out what the modulo of the * cwnd should be. */ #define PAD(len) ((((len) / 4) + !!((len) % 4)) * 4) if (TCPS_HAVEESTABLISHED(tp->t_state)) { if (tp->t_flags & TF_RCVD_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = 0; #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PAD(TCPOLEN_SIGNATURE); #endif } else { if (tp->t_flags & TF_REQ_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = PAD(TCPOLEN_MAXSEG); if (tp->t_flags & TF_REQ_SCALE) optlen += PAD(TCPOLEN_WINDOW); #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PAD(TCPOLEN_SIGNATURE); #endif if (tp->t_flags & TF_SACK_PERMIT) optlen += PAD(TCPOLEN_SACK_PERMITTED); } #undef PAD optlen = min(optlen, TCP_MAXOLEN); return (tp->t_maxseg - optlen); } static int sysctl_drop(SYSCTL_HANDLER_ARGS) { /* addrs[0] is a foreign socket, addrs[1] is a local one. */ struct sockaddr_storage addrs[2]; struct inpcb *inp; struct tcpcb *tp; struct tcptw *tw; #ifdef INET struct sockaddr_in *fin = NULL, *lin = NULL; #endif struct epoch_tracker et; #ifdef INET6 struct sockaddr_in6 *fin6, *lin6; #endif int error; inp = NULL; #ifdef INET6 fin6 = lin6 = NULL; #endif error = 0; if (req->oldptr != NULL || req->oldlen != 0) return (EINVAL); if (req->newptr == NULL) return (EPERM); if (req->newlen < sizeof(addrs)) return (ENOMEM); error = SYSCTL_IN(req, &addrs, sizeof(addrs)); if (error) return (error); switch (addrs[0].ss_family) { #ifdef INET6 case AF_INET6: fin6 = (struct sockaddr_in6 *)&addrs[0]; lin6 = (struct sockaddr_in6 *)&addrs[1]; if (fin6->sin6_len != sizeof(struct sockaddr_in6) || lin6->sin6_len != sizeof(struct sockaddr_in6)) return (EINVAL); if (IN6_IS_ADDR_V4MAPPED(&fin6->sin6_addr)) { if (!IN6_IS_ADDR_V4MAPPED(&lin6->sin6_addr)) return (EINVAL); in6_sin6_2_sin_in_sock((struct sockaddr *)&addrs[0]); in6_sin6_2_sin_in_sock((struct sockaddr *)&addrs[1]); #ifdef INET fin = (struct sockaddr_in *)&addrs[0]; lin = (struct sockaddr_in *)&addrs[1]; #endif break; } error = sa6_embedscope(fin6, V_ip6_use_defzone); if (error) return (error); error = sa6_embedscope(lin6, V_ip6_use_defzone); if (error) return (error); break; #endif #ifdef INET case AF_INET: fin = (struct sockaddr_in *)&addrs[0]; lin = (struct sockaddr_in *)&addrs[1]; if (fin->sin_len != sizeof(struct sockaddr_in) || lin->sin_len != sizeof(struct sockaddr_in)) return (EINVAL); break; #endif default: return (EINVAL); } NET_EPOCH_ENTER(et); switch (addrs[0].ss_family) { #ifdef INET6 case AF_INET6: inp = in6_pcblookup(&V_tcbinfo, &fin6->sin6_addr, fin6->sin6_port, &lin6->sin6_addr, lin6->sin6_port, INPLOOKUP_WLOCKPCB, NULL); break; #endif #ifdef INET case AF_INET: inp = in_pcblookup(&V_tcbinfo, fin->sin_addr, fin->sin_port, lin->sin_addr, lin->sin_port, INPLOOKUP_WLOCKPCB, NULL); break; #endif } if (inp != NULL) { if (inp->inp_flags & INP_TIMEWAIT) { /* * XXXRW: There currently exists a state where an * inpcb is present, but its timewait state has been * discarded. For now, don't allow dropping of this * type of inpcb. */ tw = intotw(inp); if (tw != NULL) tcp_twclose(tw, 0); else INP_WUNLOCK(inp); } else if ((inp->inp_flags & INP_DROPPED) == 0 && !SOLISTENING(inp->inp_socket)) { tp = intotcpcb(inp); tp = tcp_drop(tp, ECONNABORTED); if (tp != NULL) INP_WUNLOCK(inp); } else INP_WUNLOCK(inp); } else error = ESRCH; NET_EPOCH_EXIT(et); return (error); } SYSCTL_PROC(_net_inet_tcp, TCPCTL_DROP, drop, CTLFLAG_VNET | CTLTYPE_STRUCT | CTLFLAG_WR | CTLFLAG_SKIP | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_drop, "", "Drop TCP connection"); static int tcp_sysctl_setsockopt(SYSCTL_HANDLER_ARGS) { return (sysctl_setsockopt(oidp, arg1, arg2, req, &V_tcbinfo, &tcp_ctloutput_set)); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, setsockopt, CTLFLAG_VNET | CTLTYPE_STRUCT | CTLFLAG_WR | CTLFLAG_SKIP | CTLFLAG_MPSAFE, NULL, 0, tcp_sysctl_setsockopt, "", "Set socket option for TCP endpoint"); #ifdef KERN_TLS static int sysctl_switch_tls(SYSCTL_HANDLER_ARGS) { /* addrs[0] is a foreign socket, addrs[1] is a local one. */ struct sockaddr_storage addrs[2]; struct inpcb *inp; #ifdef INET struct sockaddr_in *fin = NULL, *lin = NULL; #endif struct epoch_tracker et; #ifdef INET6 struct sockaddr_in6 *fin6, *lin6; #endif int error; inp = NULL; #ifdef INET6 fin6 = lin6 = NULL; #endif error = 0; if (req->oldptr != NULL || req->oldlen != 0) return (EINVAL); if (req->newptr == NULL) return (EPERM); if (req->newlen < sizeof(addrs)) return (ENOMEM); error = SYSCTL_IN(req, &addrs, sizeof(addrs)); if (error) return (error); switch (addrs[0].ss_family) { #ifdef INET6 case AF_INET6: fin6 = (struct sockaddr_in6 *)&addrs[0]; lin6 = (struct sockaddr_in6 *)&addrs[1]; if (fin6->sin6_len != sizeof(struct sockaddr_in6) || lin6->sin6_len != sizeof(struct sockaddr_in6)) return (EINVAL); if (IN6_IS_ADDR_V4MAPPED(&fin6->sin6_addr)) { if (!IN6_IS_ADDR_V4MAPPED(&lin6->sin6_addr)) return (EINVAL); in6_sin6_2_sin_in_sock((struct sockaddr *)&addrs[0]); in6_sin6_2_sin_in_sock((struct sockaddr *)&addrs[1]); #ifdef INET fin = (struct sockaddr_in *)&addrs[0]; lin = (struct sockaddr_in *)&addrs[1]; #endif break; } error = sa6_embedscope(fin6, V_ip6_use_defzone); if (error) return (error); error = sa6_embedscope(lin6, V_ip6_use_defzone); if (error) return (error); break; #endif #ifdef INET case AF_INET: fin = (struct sockaddr_in *)&addrs[0]; lin = (struct sockaddr_in *)&addrs[1]; if (fin->sin_len != sizeof(struct sockaddr_in) || lin->sin_len != sizeof(struct sockaddr_in)) return (EINVAL); break; #endif default: return (EINVAL); } NET_EPOCH_ENTER(et); switch (addrs[0].ss_family) { #ifdef INET6 case AF_INET6: inp = in6_pcblookup(&V_tcbinfo, &fin6->sin6_addr, fin6->sin6_port, &lin6->sin6_addr, lin6->sin6_port, INPLOOKUP_WLOCKPCB, NULL); break; #endif #ifdef INET case AF_INET: inp = in_pcblookup(&V_tcbinfo, fin->sin_addr, fin->sin_port, lin->sin_addr, lin->sin_port, INPLOOKUP_WLOCKPCB, NULL); break; #endif } NET_EPOCH_EXIT(et); if (inp != NULL) { if ((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) != 0 || inp->inp_socket == NULL) { error = ECONNRESET; INP_WUNLOCK(inp); } else { struct socket *so; so = inp->inp_socket; soref(so); error = ktls_set_tx_mode(so, arg2 == 0 ? TCP_TLS_MODE_SW : TCP_TLS_MODE_IFNET); INP_WUNLOCK(inp); sorele(so); } } else error = ESRCH; return (error); } SYSCTL_PROC(_net_inet_tcp, OID_AUTO, switch_to_sw_tls, CTLFLAG_VNET | CTLTYPE_STRUCT | CTLFLAG_WR | CTLFLAG_SKIP | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_switch_tls, "", "Switch TCP connection to SW TLS"); SYSCTL_PROC(_net_inet_tcp, OID_AUTO, switch_to_ifnet_tls, CTLFLAG_VNET | CTLTYPE_STRUCT | CTLFLAG_WR | CTLFLAG_SKIP | CTLFLAG_NEEDGIANT, NULL, 1, sysctl_switch_tls, "", "Switch TCP connection to ifnet TLS"); #endif /* * Generate a standardized TCP log line for use throughout the * tcp subsystem. Memory allocation is done with M_NOWAIT to * allow use in the interrupt context. * * NB: The caller MUST free(s, M_TCPLOG) the returned string. * NB: The function may return NULL if memory allocation failed. * * Due to header inclusion and ordering limitations the struct ip * and ip6_hdr pointers have to be passed as void pointers. */ char * tcp_log_vain(struct in_conninfo *inc, struct tcphdr *th, const void *ip4hdr, const void *ip6hdr) { /* Is logging enabled? */ if (V_tcp_log_in_vain == 0) return (NULL); return (tcp_log_addr(inc, th, ip4hdr, ip6hdr)); } char * tcp_log_addrs(struct in_conninfo *inc, struct tcphdr *th, const void *ip4hdr, const void *ip6hdr) { /* Is logging enabled? */ if (tcp_log_debug == 0) return (NULL); return (tcp_log_addr(inc, th, ip4hdr, ip6hdr)); } static char * tcp_log_addr(struct in_conninfo *inc, struct tcphdr *th, const void *ip4hdr, const void *ip6hdr) { char *s, *sp; size_t size; #ifdef INET const struct ip *ip = (const struct ip *)ip4hdr; #endif #ifdef INET6 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)ip6hdr; #endif /* INET6 */ /* * The log line looks like this: * "TCP: [1.2.3.4]:50332 to [1.2.3.4]:80 tcpflags 0x2" */ size = sizeof("TCP: []:12345 to []:12345 tcpflags 0x2<>") + sizeof(PRINT_TH_FLAGS) + 1 + #ifdef INET6 2 * INET6_ADDRSTRLEN; #else 2 * INET_ADDRSTRLEN; #endif /* INET6 */ s = malloc(size, M_TCPLOG, M_ZERO|M_NOWAIT); if (s == NULL) return (NULL); strcat(s, "TCP: ["); sp = s + strlen(s); if (inc && ((inc->inc_flags & INC_ISIPV6) == 0)) { inet_ntoa_r(inc->inc_faddr, sp); sp = s + strlen(s); sprintf(sp, "]:%i to [", ntohs(inc->inc_fport)); sp = s + strlen(s); inet_ntoa_r(inc->inc_laddr, sp); sp = s + strlen(s); sprintf(sp, "]:%i", ntohs(inc->inc_lport)); #ifdef INET6 } else if (inc) { ip6_sprintf(sp, &inc->inc6_faddr); sp = s + strlen(s); sprintf(sp, "]:%i to [", ntohs(inc->inc_fport)); sp = s + strlen(s); ip6_sprintf(sp, &inc->inc6_laddr); sp = s + strlen(s); sprintf(sp, "]:%i", ntohs(inc->inc_lport)); } else if (ip6 && th) { ip6_sprintf(sp, &ip6->ip6_src); sp = s + strlen(s); sprintf(sp, "]:%i to [", ntohs(th->th_sport)); sp = s + strlen(s); ip6_sprintf(sp, &ip6->ip6_dst); sp = s + strlen(s); sprintf(sp, "]:%i", ntohs(th->th_dport)); #endif /* INET6 */ #ifdef INET } else if (ip && th) { inet_ntoa_r(ip->ip_src, sp); sp = s + strlen(s); sprintf(sp, "]:%i to [", ntohs(th->th_sport)); sp = s + strlen(s); inet_ntoa_r(ip->ip_dst, sp); sp = s + strlen(s); sprintf(sp, "]:%i", ntohs(th->th_dport)); #endif /* INET */ } else { free(s, M_TCPLOG); return (NULL); } sp = s + strlen(s); if (th) sprintf(sp, " tcpflags 0x%b", tcp_get_flags(th), PRINT_TH_FLAGS); if (*(s + size - 1) != '\0') panic("%s: string too long", __func__); return (s); } /* * A subroutine which makes it easy to track TCP state changes with DTrace. * This function shouldn't be called for t_state initializations that don't * correspond to actual TCP state transitions. */ void tcp_state_change(struct tcpcb *tp, int newstate) { #if defined(KDTRACE_HOOKS) int pstate = tp->t_state; #endif TCPSTATES_DEC(tp->t_state); TCPSTATES_INC(newstate); tp->t_state = newstate; TCP_PROBE6(state__change, NULL, tp, NULL, tp, NULL, pstate); } /* * Create an external-format (``xtcpcb'') structure using the information in * the kernel-format tcpcb structure pointed to by tp. This is done to * reduce the spew of irrelevant information over this interface, to isolate * user code from changes in the kernel structure, and potentially to provide * information-hiding if we decide that some of this information should be * hidden from users. */ void tcp_inptoxtp(const struct inpcb *inp, struct xtcpcb *xt) { struct tcpcb *tp = intotcpcb(inp); struct tcptw *tw = intotw(inp); sbintime_t now; bzero(xt, sizeof(*xt)); if (inp->inp_flags & INP_TIMEWAIT) { xt->t_state = TCPS_TIME_WAIT; xt->xt_encaps_port = tw->t_port; } else { xt->t_state = tp->t_state; xt->t_logstate = tp->t_logstate; xt->t_flags = tp->t_flags; xt->t_sndzerowin = tp->t_sndzerowin; xt->t_sndrexmitpack = tp->t_sndrexmitpack; xt->t_rcvoopack = tp->t_rcvoopack; xt->t_rcv_wnd = tp->rcv_wnd; xt->t_snd_wnd = tp->snd_wnd; xt->t_snd_cwnd = tp->snd_cwnd; xt->t_snd_ssthresh = tp->snd_ssthresh; xt->t_dsack_bytes = tp->t_dsack_bytes; xt->t_dsack_tlp_bytes = tp->t_dsack_tlp_bytes; xt->t_dsack_pack = tp->t_dsack_pack; xt->t_maxseg = tp->t_maxseg; xt->xt_ecn = (tp->t_flags2 & TF2_ECN_PERMIT) ? 1 : 0 + (tp->t_flags2 & TF2_ACE_PERMIT) ? 2 : 0; now = getsbinuptime(); #define COPYTIMER(ttt) do { \ if (callout_active(&tp->t_timers->ttt)) \ xt->ttt = (tp->t_timers->ttt.c_time - now) / \ SBT_1MS; \ else \ xt->ttt = 0; \ } while (0) COPYTIMER(tt_delack); COPYTIMER(tt_rexmt); COPYTIMER(tt_persist); COPYTIMER(tt_keep); COPYTIMER(tt_2msl); #undef COPYTIMER xt->t_rcvtime = 1000 * (ticks - tp->t_rcvtime) / hz; xt->xt_encaps_port = tp->t_port; bcopy(tp->t_fb->tfb_tcp_block_name, xt->xt_stack, TCP_FUNCTION_NAME_LEN_MAX); bcopy(CC_ALGO(tp)->name, xt->xt_cc, TCP_CA_NAME_MAX); #ifdef TCP_BLACKBOX (void)tcp_log_get_id(tp, xt->xt_logid); #endif } xt->xt_len = sizeof(struct xtcpcb); in_pcbtoxinpcb(inp, &xt->xt_inp); if (inp->inp_socket == NULL) xt->xt_inp.xi_socket.xso_protocol = IPPROTO_TCP; } void tcp_log_end_status(struct tcpcb *tp, uint8_t status) { uint32_t bit, i; if ((tp == NULL) || (status > TCP_EI_STATUS_MAX_VALUE) || (status == 0)) { /* Invalid */ return; } if (status > (sizeof(uint32_t) * 8)) { /* Should this be a KASSERT? */ return; } bit = 1U << (status - 1); if (bit & tp->t_end_info_status) { /* already logged */ return; } for (i = 0; i < TCP_END_BYTE_INFO; i++) { if (tp->t_end_info_bytes[i] == TCP_EI_EMPTY_SLOT) { tp->t_end_info_bytes[i] = status; tp->t_end_info_status |= bit; break; } } } int tcp_can_enable_pacing(void) { if ((tcp_pacing_limit == -1) || (tcp_pacing_limit > number_of_tcp_connections_pacing)) { atomic_fetchadd_int(&number_of_tcp_connections_pacing, 1); shadow_num_connections = number_of_tcp_connections_pacing; return (1); } else { return (0); } } static uint8_t tcp_pacing_warning = 0; void tcp_decrement_paced_conn(void) { uint32_t ret; ret = atomic_fetchadd_int(&number_of_tcp_connections_pacing, -1); shadow_num_connections = number_of_tcp_connections_pacing; KASSERT(ret != 0, ("tcp_paced_connection_exits -1 would cause wrap?")); if (ret == 0) { if (tcp_pacing_limit != -1) { printf("Warning all pacing is now disabled, count decrements invalidly!\n"); tcp_pacing_limit = 0; } else if (tcp_pacing_warning == 0) { printf("Warning pacing count is invalid, invalid decrement\n"); tcp_pacing_warning = 1; } } } diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c index 372341a0351c..70474fa18f92 100644 --- a/sys/netinet/udp_usrreq.c +++ b/sys/netinet/udp_usrreq.c @@ -1,1789 +1,1770 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 * The Regents of the University of California. * Copyright (c) 2008 Robert N. M. Watson * Copyright (c) 2010-2011 Juniper Networks, Inc. * Copyright (c) 2014 Kevin Lo * All rights reserved. * * Portions of this software were developed by Robert N. M. Watson under * contract to Juniper Networks, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_route.h" #include "opt_rss.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET6 #include #endif #include #include #include #include #ifdef INET6 #include #endif #include #include #include #include #include #include #include /* * UDP and UDP-Lite protocols implementation. * Per RFC 768, August, 1980. * Per RFC 3828, July, 2004. */ /* * BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums * removes the only data integrity mechanism for packets and malformed * packets that would otherwise be discarded due to bad checksums, and may * cause problems (especially for NFS data blocks). */ VNET_DEFINE(int, udp_cksum) = 1; SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(udp_cksum), 0, "compute udp checksum"); VNET_DEFINE(int, udp_log_in_vain) = 0; SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(udp_log_in_vain), 0, "Log all incoming UDP packets"); VNET_DEFINE(int, udp_blackhole) = 0; SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(udp_blackhole), 0, "Do not send port unreachables for refused connects"); VNET_DEFINE(bool, udp_blackhole_local) = false; SYSCTL_BOOL(_net_inet_udp, OID_AUTO, blackhole_local, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(udp_blackhole_local), false, "Enforce net.inet.udp.blackhole for locally originated packets"); u_long udp_sendspace = 9216; /* really max datagram size */ SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW, &udp_sendspace, 0, "Maximum outgoing UDP datagram size"); u_long udp_recvspace = 40 * (1024 + #ifdef INET6 sizeof(struct sockaddr_in6) #else sizeof(struct sockaddr_in) #endif ); /* 40 1K datagrams */ SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW, &udp_recvspace, 0, "Maximum space for incoming UDP datagrams"); VNET_DEFINE(struct inpcbinfo, udbinfo); VNET_DEFINE(struct inpcbinfo, ulitecbinfo); VNET_DEFINE_STATIC(uma_zone_t, udpcb_zone); #define V_udpcb_zone VNET(udpcb_zone) #ifndef UDBHASHSIZE #define UDBHASHSIZE 128 #endif VNET_PCPUSTAT_DEFINE(struct udpstat, udpstat); /* from udp_var.h */ VNET_PCPUSTAT_SYSINIT(udpstat); SYSCTL_VNET_PCPUSTAT(_net_inet_udp, UDPCTL_STATS, stats, struct udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)"); #ifdef VIMAGE VNET_PCPUSTAT_SYSUNINIT(udpstat); #endif /* VIMAGE */ #ifdef INET static void udp_detach(struct socket *so); static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *, struct mbuf *, struct thread *, int); #endif INPCBSTORAGE_DEFINE(udpcbstor, "udpinp", "udp_inpcb", "udp", "udphash"); INPCBSTORAGE_DEFINE(udplitecbstor, "udpliteinp", "udplite_inpcb", "udplite", "udplitehash"); static void udp_vnet_init(void *arg __unused) { /* * For now default to 2-tuple UDP hashing - until the fragment * reassembly code can also update the flowid. * * Once we can calculate the flowid that way and re-establish * a 4-tuple, flip this to 4-tuple. */ in_pcbinfo_init(&V_udbinfo, &udpcbstor, UDBHASHSIZE, UDBHASHSIZE); V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); uma_zone_set_max(V_udpcb_zone, maxsockets); uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached"); /* Additional pcbinfo for UDP-Lite */ in_pcbinfo_init(&V_ulitecbinfo, &udplitecbstor, UDBHASHSIZE, UDBHASHSIZE); } VNET_SYSINIT(udp_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_vnet_init, NULL); /* * Kernel module interface for updating udpstat. The argument is an index * into udpstat treated as an array of u_long. While this encodes the * general layout of udpstat into the caller, it doesn't encode its location, * so that future changes to add, for example, per-CPU stats support won't * cause binary compatibility problems for kernel modules. */ void kmod_udpstat_inc(int statnum) { counter_u64_add(VNET(udpstat)[statnum], 1); } int udp_newudpcb(struct inpcb *inp) { struct udpcb *up; up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO); if (up == NULL) return (ENOBUFS); inp->inp_ppcb = up; return (0); } void udp_discardcb(struct udpcb *up) { uma_zfree(V_udpcb_zone, up); } #ifdef VIMAGE static void udp_destroy(void *unused __unused) { in_pcbinfo_destroy(&V_udbinfo); uma_zdestroy(V_udpcb_zone); } VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL); static void udplite_destroy(void *unused __unused) { in_pcbinfo_destroy(&V_ulitecbinfo); } VNET_SYSUNINIT(udplite, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udplite_destroy, NULL); #endif #ifdef INET /* * Subroutine of udp_input(), which appends the provided mbuf chain to the * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that * contains the source address. If the socket ends up being an IPv6 socket, * udp_append() will convert to a sockaddr_in6 before passing the address * into the socket code. * * In the normal case udp_append() will return 0, indicating that you * must unlock the inp. However if a tunneling protocol is in place we increment * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we * then decrement the reference count. If the inp_rele returns 1, indicating the * inp is gone, we return that to the caller to tell them *not* to unlock * the inp. In the case of multi-cast this will cause the distribution * to stop (though most tunneling protocols known currently do *not* use * multicast). */ static int udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off, struct sockaddr_in *udp_in) { struct sockaddr *append_sa; struct socket *so; struct mbuf *tmpopts, *opts = NULL; #ifdef INET6 struct sockaddr_in6 udp_in6; #endif struct udpcb *up; bool filtered; INP_LOCK_ASSERT(inp); /* * Engage the tunneling protocol. */ up = intoudpcb(inp); if (up->u_tun_func != NULL) { in_pcbref(inp); INP_RUNLOCK(inp); filtered = (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0], up->u_tun_ctx); INP_RLOCK(inp); if (filtered) return (in_pcbrele_rlocked(inp)); } off += sizeof(struct udphdr); #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* Check AH/ESP integrity. */ if (IPSEC_ENABLED(ipv4) && IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) { m_freem(n); return (0); } if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */ if (IPSEC_ENABLED(ipv4) && UDPENCAP_INPUT(n, off, AF_INET) != 0) return (0); /* Consumed. */ } #endif /* IPSEC */ #ifdef MAC if (mac_inpcb_check_deliver(inp, n) != 0) { m_freem(n); return (0); } #endif /* MAC */ if (inp->inp_flags & INP_CONTROLOPTS || inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) { #ifdef INET6 if (inp->inp_vflag & INP_IPV6) (void)ip6_savecontrol_v4(inp, n, &opts, NULL); else #endif /* INET6 */ ip_savecontrol(inp, &opts, ip, n); } if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { tmpopts = sbcreatecontrol(&udp_in[1], sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP, M_NOWAIT); if (tmpopts) { if (opts) { tmpopts->m_next = opts; opts = tmpopts; } else opts = tmpopts; } } #ifdef INET6 if (inp->inp_vflag & INP_IPV6) { bzero(&udp_in6, sizeof(udp_in6)); udp_in6.sin6_len = sizeof(udp_in6); udp_in6.sin6_family = AF_INET6; in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6); append_sa = (struct sockaddr *)&udp_in6; } else #endif /* INET6 */ append_sa = (struct sockaddr *)&udp_in[0]; m_adj(n, off); so = inp->inp_socket; SOCKBUF_LOCK(&so->so_rcv); if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) { soroverflow_locked(so); m_freem(n); if (opts) m_freem(opts); UDPSTAT_INC(udps_fullsock); } else sorwakeup_locked(so); return (0); } static bool udp_multi_match(const struct inpcb *inp, void *v) { struct ip *ip = v; struct udphdr *uh = (struct udphdr *)(ip + 1); if (inp->inp_lport != uh->uh_dport) return (false); #ifdef INET6 if ((inp->inp_vflag & INP_IPV4) == 0) return (false); #endif if (inp->inp_laddr.s_addr != INADDR_ANY && inp->inp_laddr.s_addr != ip->ip_dst.s_addr) return (false); if (inp->inp_faddr.s_addr != INADDR_ANY && inp->inp_faddr.s_addr != ip->ip_src.s_addr) return (false); if (inp->inp_fport != 0 && inp->inp_fport != uh->uh_sport) return (false); return (true); } static int udp_multi_input(struct mbuf *m, int proto, struct sockaddr_in *udp_in) { struct ip *ip = mtod(m, struct ip *); struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), INPLOOKUP_RLOCKPCB, udp_multi_match, ip); #ifdef KDTRACE_HOOKS struct udphdr *uh = (struct udphdr *)(ip + 1); #endif struct inpcb *inp; struct mbuf *n; int appends = 0; MPASS(ip->ip_hl == sizeof(struct ip) >> 2); while ((inp = inp_next(&inpi)) != NULL) { /* * XXXRW: Because we weren't holding either the inpcb * or the hash lock when we checked for a match * before, we should probably recheck now that the * inpcb lock is held. */ /* * Handle socket delivery policy for any-source * and source-specific multicast. [RFC3678] */ if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { struct ip_moptions *imo; struct sockaddr_in group; int blocked; imo = inp->inp_moptions; if (imo == NULL) continue; bzero(&group, sizeof(struct sockaddr_in)); group.sin_len = sizeof(struct sockaddr_in); group.sin_family = AF_INET; group.sin_addr = ip->ip_dst; blocked = imo_multi_filter(imo, m->m_pkthdr.rcvif, (struct sockaddr *)&group, (struct sockaddr *)&udp_in[0]); if (blocked != MCAST_PASS) { if (blocked == MCAST_NOTGMEMBER) IPSTAT_INC(ips_notmember); if (blocked == MCAST_NOTSMEMBER || blocked == MCAST_MUTED) UDPSTAT_INC(udps_filtermcast); continue; } } if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { if (proto == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh); else UDP_PROBE(receive, NULL, inp, ip, inp, uh); if (udp_append(inp, ip, n, sizeof(struct ip), udp_in)) { INP_RUNLOCK(inp); break; } else appends++; } /* * Don't look for additional matches if this one does * not have either the SO_REUSEPORT or SO_REUSEADDR * socket options set. This heuristic avoids * searching through all pcbs in the common case of a * non-shared port. It assumes that an application * will never clear these options after setting them. */ if ((inp->inp_socket->so_options & (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { INP_RUNLOCK(inp); break; } } if (appends == 0) { /* * No matching pcb found; discard datagram. (No need * to send an ICMP Port Unreachable for a broadcast * or multicast datgram.) */ UDPSTAT_INC(udps_noport); if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) UDPSTAT_INC(udps_noportmcast); else UDPSTAT_INC(udps_noportbcast); } m_freem(m); return (IPPROTO_DONE); } static int udp_input(struct mbuf **mp, int *offp, int proto) { struct ip *ip; struct udphdr *uh; struct ifnet *ifp; struct inpcb *inp; uint16_t len, ip_len; struct inpcbinfo *pcbinfo; struct sockaddr_in udp_in[2]; struct mbuf *m; struct m_tag *fwd_tag; int cscov_partial, iphlen; m = *mp; iphlen = *offp; ifp = m->m_pkthdr.rcvif; *mp = NULL; UDPSTAT_INC(udps_ipackets); /* * Strip IP options, if any; should skip this, make available to * user, and use on returned packets, but we don't yet have a way to * check the checksum with options still present. */ if (iphlen > sizeof (struct ip)) { ip_stripoptions(m); iphlen = sizeof(struct ip); } /* * Get IP and UDP header together in first mbuf. */ if (m->m_len < iphlen + sizeof(struct udphdr)) { if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) { UDPSTAT_INC(udps_hdrops); return (IPPROTO_DONE); } } ip = mtod(m, struct ip *); uh = (struct udphdr *)((caddr_t)ip + iphlen); cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0; /* * Destination port of 0 is illegal, based on RFC768. */ if (uh->uh_dport == 0) goto badunlocked; /* * Construct sockaddr format source address. Stuff source address * and datagram in user buffer. */ bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2); udp_in[0].sin_len = sizeof(struct sockaddr_in); udp_in[0].sin_family = AF_INET; udp_in[0].sin_port = uh->uh_sport; udp_in[0].sin_addr = ip->ip_src; udp_in[1].sin_len = sizeof(struct sockaddr_in); udp_in[1].sin_family = AF_INET; udp_in[1].sin_port = uh->uh_dport; udp_in[1].sin_addr = ip->ip_dst; /* * Make mbuf data length reflect UDP length. If not enough data to * reflect UDP length, drop. */ len = ntohs((u_short)uh->uh_ulen); ip_len = ntohs(ip->ip_len) - iphlen; if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) { /* Zero means checksum over the complete packet. */ if (len == 0) len = ip_len; cscov_partial = 0; } if (ip_len != len) { if (len > ip_len || len < sizeof(struct udphdr)) { UDPSTAT_INC(udps_badlen); goto badunlocked; } if (proto == IPPROTO_UDP) m_adj(m, len - ip_len); } /* * Checksum extended UDP header and data. */ if (uh->uh_sum) { u_short uh_sum; if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) && !cscov_partial) { if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) uh_sum = m->m_pkthdr.csum_data; else uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htonl((u_short)len + m->m_pkthdr.csum_data + proto)); uh_sum ^= 0xffff; } else { char b[offsetof(struct ipovly, ih_src)]; struct ipovly *ipov = (struct ipovly *)ip; bcopy(ipov, b, sizeof(b)); bzero(ipov, sizeof(ipov->ih_x1)); ipov->ih_len = (proto == IPPROTO_UDP) ? uh->uh_ulen : htons(ip_len); uh_sum = in_cksum(m, len + sizeof (struct ip)); bcopy(b, ipov, sizeof(b)); } if (uh_sum) { UDPSTAT_INC(udps_badsum); m_freem(m); return (IPPROTO_DONE); } } else { if (proto == IPPROTO_UDP) { UDPSTAT_INC(udps_nosum); } else { /* UDPLite requires a checksum */ /* XXX: What is the right UDPLite MIB counter here? */ m_freem(m); return (IPPROTO_DONE); } } if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || in_broadcast(ip->ip_dst, ifp)) return (udp_multi_input(m, proto, udp_in)); pcbinfo = udp_get_inpcbinfo(proto); /* * Locate pcb for datagram. * * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. */ if ((m->m_flags & M_IP_NEXTHOP) && (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { struct sockaddr_in *next_hop; next_hop = (struct sockaddr_in *)(fwd_tag + 1); /* * Transparently forwarded. Pretend to be the destination. * Already got one like this? */ inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport, ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m); if (!inp) { /* * It's new. Try to find the ambushing socket. * Because we've rewritten the destination address, * any hardware-generated hash is ignored. */ inp = in_pcblookup(pcbinfo, ip->ip_src, uh->uh_sport, next_hop->sin_addr, next_hop->sin_port ? htons(next_hop->sin_port) : uh->uh_dport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, ifp); } /* Remove the tag from the packet. We don't need it anymore. */ m_tag_delete(m, fwd_tag); m->m_flags &= ~M_IP_NEXTHOP; } else inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport, ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, ifp, m); if (inp == NULL) { if (V_udp_log_in_vain) { char src[INET_ADDRSTRLEN]; char dst[INET_ADDRSTRLEN]; log(LOG_INFO, "Connection attempt to UDP %s:%d from %s:%d\n", inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport), inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport)); } if (proto == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, NULL, ip, NULL, uh); else UDP_PROBE(receive, NULL, NULL, ip, NULL, uh); UDPSTAT_INC(udps_noport); if (m->m_flags & (M_BCAST | M_MCAST)) { UDPSTAT_INC(udps_noportbcast); goto badunlocked; } if (V_udp_blackhole && (V_udp_blackhole_local || !in_localip(ip->ip_src))) goto badunlocked; if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0) goto badunlocked; icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); return (IPPROTO_DONE); } /* * Check the minimum TTL for socket. */ INP_RLOCK_ASSERT(inp); if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) { if (proto == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh); else UDP_PROBE(receive, NULL, inp, ip, inp, uh); INP_RUNLOCK(inp); m_freem(m); return (IPPROTO_DONE); } if (cscov_partial) { struct udpcb *up; up = intoudpcb(inp); if (up->u_rxcslen == 0 || up->u_rxcslen > len) { INP_RUNLOCK(inp); m_freem(m); return (IPPROTO_DONE); } } if (proto == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh); else UDP_PROBE(receive, NULL, inp, ip, inp, uh); if (udp_append(inp, ip, m, iphlen, udp_in) == 0) INP_RUNLOCK(inp); return (IPPROTO_DONE); badunlocked: m_freem(m); return (IPPROTO_DONE); } #endif /* INET */ /* * Notify a udp user of an asynchronous error; just wake up so that they can * collect error status. */ struct inpcb * udp_notify(struct inpcb *inp, int errno) { INP_WLOCK_ASSERT(inp); if ((errno == EHOSTUNREACH || errno == ENETUNREACH || errno == EHOSTDOWN) && inp->inp_route.ro_nh) { NH_FREE(inp->inp_route.ro_nh); inp->inp_route.ro_nh = (struct nhop_object *)NULL; } inp->inp_socket->so_error = errno; sorwakeup(inp->inp_socket); sowwakeup(inp->inp_socket); return (inp); } #ifdef INET static void udp_common_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *ip, struct inpcbinfo *pcbinfo) { struct udphdr *uh; struct inpcb *inp; - if (PRC_IS_REDIRECT(cmd)) { - /* signal EHOSTDOWN, as it flushes the cached route */ - in_pcbnotifyall(pcbinfo, sin->sin_addr, EHOSTDOWN, udp_notify); + if (inetctlerrmap[cmd] == 0) return; - } - /* - * Hostdead is ugly because it goes linearly through all PCBs. - * - * XXX: We never get this from ICMP, otherwise it makes an excellent - * DoS attack on machines with many connections. - */ - if (cmd == PRC_HOSTDEAD) - ip = NULL; - else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) - return; - if (ip != NULL) { - uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + inp = in_pcblookup(pcbinfo, sin->sin_addr, uh->uh_dport, ip->ip_src, + uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL); + if (inp != NULL) { + INP_WLOCK_ASSERT(inp); + if (inp->inp_socket != NULL) + udp_notify(inp, inetctlerrmap[cmd]); + INP_WUNLOCK(inp); + } else { inp = in_pcblookup(pcbinfo, sin->sin_addr, uh->uh_dport, - ip->ip_src, uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL); + ip->ip_src, uh->uh_sport, + INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); if (inp != NULL) { - INP_WLOCK_ASSERT(inp); - if (inp->inp_socket != NULL) { - udp_notify(inp, inetctlerrmap[cmd]); - } - INP_WUNLOCK(inp); - } else { - inp = in_pcblookup(pcbinfo, sin->sin_addr, uh->uh_dport, - ip->ip_src, uh->uh_sport, - INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); - if (inp != NULL) { - struct udpcb *up; - void *ctx; - udp_tun_icmp_t *func; - - up = intoudpcb(inp); - ctx = up->u_tun_ctx; - func = up->u_icmp_func; - INP_RUNLOCK(inp); - if (func != NULL) - (*func)(cmd, (struct sockaddr *)sin, - ip, ctx); - } + struct udpcb *up; + void *ctx; + udp_tun_icmp_t *func; + + up = intoudpcb(inp); + ctx = up->u_tun_ctx; + func = up->u_icmp_func; + INP_RUNLOCK(inp); + if (func != NULL) + (*func)(cmd, (struct sockaddr *)sin, ip, ctx); } - } else - in_pcbnotifyall(pcbinfo, sin->sin_addr, inetctlerrmap[cmd], - udp_notify); + } } static void udp_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *ip) { return (udp_common_ctlinput(cmd, sin, ip, &V_udbinfo)); } static void udplite_ctlinput(int cmd, struct sockaddr_in *sin, struct ip *ip) { return (udp_common_ctlinput(cmd, sin, ip, &V_ulitecbinfo)); } #endif /* INET */ static int udp_pcblist(SYSCTL_HANDLER_ARGS) { struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_udbinfo, INPLOOKUP_RLOCKPCB); struct xinpgen xig; struct inpcb *inp; int error; if (req->newptr != 0) return (EPERM); if (req->oldptr == 0) { int n; n = V_udbinfo.ipi_count; n += imax(n / 8, 10); req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb); return (0); } if ((error = sysctl_wire_old_buffer(req, 0)) != 0) return (error); bzero(&xig, sizeof(xig)); xig.xig_len = sizeof xig; xig.xig_count = V_udbinfo.ipi_count; xig.xig_gen = V_udbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; error = SYSCTL_OUT(req, &xig, sizeof xig); if (error) return (error); while ((inp = inp_next(&inpi)) != NULL) { if (inp->inp_gencnt <= xig.xig_gen && cr_canseeinpcb(req->td->td_ucred, inp) == 0) { struct xinpcb xi; in_pcbtoxinpcb(inp, &xi); error = SYSCTL_OUT(req, &xi, sizeof xi); if (error) { INP_RUNLOCK(inp); break; } } } if (!error) { /* * Give the user an updated idea of our state. If the * generation differs from what we told her before, she knows * that something happened while we were processing this * request, and it might be necessary to retry. */ xig.xig_gen = V_udbinfo.ipi_gencnt; xig.xig_sogen = so_gencnt; xig.xig_count = V_udbinfo.ipi_count; error = SYSCTL_OUT(req, &xig, sizeof xig); } return (error); } SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, udp_pcblist, "S,xinpcb", "List of active UDP sockets"); #ifdef INET static int udp_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in addrs[2]; struct epoch_tracker et; struct inpcb *inp; int error; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); NET_EPOCH_ENTER(et); inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port, addrs[0].sin_addr, addrs[0].sin_port, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); NET_EPOCH_EXIT(et); if (inp != NULL) { INP_RLOCK_ASSERT(inp); if (inp->inp_socket == NULL) error = ENOENT; if (error == 0) error = cr_canseeinpcb(req->td->td_ucred, inp); if (error == 0) cru2x(inp->inp_cred, &xuc); INP_RUNLOCK(inp); } else error = ENOENT; if (error == 0) error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); return (error); } SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 0, 0, udp_getcred, "S,xucred", "Get the xucred of a UDP connection"); #endif /* INET */ int udp_ctloutput(struct socket *so, struct sockopt *sopt) { struct inpcb *inp; struct udpcb *up; int isudplite, error, optval; error = 0; isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0; inp = sotoinpcb(so); KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); INP_WLOCK(inp); if (sopt->sopt_level != so->so_proto->pr_protocol) { #ifdef INET6 if (INP_CHECK_SOCKAF(so, AF_INET6)) { INP_WUNLOCK(inp); error = ip6_ctloutput(so, sopt); } #endif #if defined(INET) && defined(INET6) else #endif #ifdef INET { INP_WUNLOCK(inp); error = ip_ctloutput(so, sopt); } #endif return (error); } switch (sopt->sopt_dir) { case SOPT_SET: switch (sopt->sopt_name) { #if defined(IPSEC) || defined(IPSEC_SUPPORT) #ifdef INET case UDP_ENCAP: if (!IPSEC_ENABLED(ipv4)) { INP_WUNLOCK(inp); return (ENOPROTOOPT); } error = UDPENCAP_PCBCTL(inp, sopt); break; #endif /* INET */ #endif /* IPSEC */ case UDPLITE_SEND_CSCOV: case UDPLITE_RECV_CSCOV: if (!isudplite) { INP_WUNLOCK(inp); error = ENOPROTOOPT; break; } INP_WUNLOCK(inp); error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval)); if (error != 0) break; inp = sotoinpcb(so); KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); INP_WLOCK(inp); up = intoudpcb(inp); KASSERT(up != NULL, ("%s: up == NULL", __func__)); if ((optval != 0 && optval < 8) || (optval > 65535)) { INP_WUNLOCK(inp); error = EINVAL; break; } if (sopt->sopt_name == UDPLITE_SEND_CSCOV) up->u_txcslen = optval; else up->u_rxcslen = optval; INP_WUNLOCK(inp); break; default: INP_WUNLOCK(inp); error = ENOPROTOOPT; break; } break; case SOPT_GET: switch (sopt->sopt_name) { #if defined(IPSEC) || defined(IPSEC_SUPPORT) #ifdef INET case UDP_ENCAP: if (!IPSEC_ENABLED(ipv4)) { INP_WUNLOCK(inp); return (ENOPROTOOPT); } error = UDPENCAP_PCBCTL(inp, sopt); break; #endif /* INET */ #endif /* IPSEC */ case UDPLITE_SEND_CSCOV: case UDPLITE_RECV_CSCOV: if (!isudplite) { INP_WUNLOCK(inp); error = ENOPROTOOPT; break; } up = intoudpcb(inp); KASSERT(up != NULL, ("%s: up == NULL", __func__)); if (sopt->sopt_name == UDPLITE_SEND_CSCOV) optval = up->u_txcslen; else optval = up->u_rxcslen; INP_WUNLOCK(inp); error = sooptcopyout(sopt, &optval, sizeof(optval)); break; default: INP_WUNLOCK(inp); error = ENOPROTOOPT; break; } break; } return (error); } #ifdef INET #ifdef INET6 /* The logic here is derived from ip6_setpktopt(). See comments there. */ static int udp_v4mapped_pktinfo(struct cmsghdr *cm, struct sockaddr_in * src, struct inpcb *inp, int flags) { struct ifnet *ifp; struct in6_pktinfo *pktinfo; struct in_addr ia; if ((flags & PRUS_IPV6) == 0) return (0); if (cm->cmsg_level != IPPROTO_IPV6) return (0); if (cm->cmsg_type != IPV6_2292PKTINFO && cm->cmsg_type != IPV6_PKTINFO) return (0); if (cm->cmsg_len != CMSG_LEN(sizeof(struct in6_pktinfo))) return (EINVAL); pktinfo = (struct in6_pktinfo *)CMSG_DATA(cm); if (!IN6_IS_ADDR_V4MAPPED(&pktinfo->ipi6_addr) && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) return (EINVAL); /* Validate the interface index if specified. */ if (pktinfo->ipi6_ifindex) { struct epoch_tracker et; NET_EPOCH_ENTER(et); ifp = ifnet_byindex(pktinfo->ipi6_ifindex); NET_EPOCH_EXIT(et); /* XXXGL: unsafe ifp */ if (ifp == NULL) return (ENXIO); } else ifp = NULL; if (ifp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) { ia.s_addr = pktinfo->ipi6_addr.s6_addr32[3]; if (in_ifhasaddr(ifp, ia) == 0) return (EADDRNOTAVAIL); } bzero(src, sizeof(*src)); src->sin_family = AF_INET; src->sin_len = sizeof(*src); src->sin_port = inp->inp_lport; src->sin_addr.s_addr = pktinfo->ipi6_addr.s6_addr32[3]; return (0); } #endif static int udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *td, int flags) { struct udpiphdr *ui; int len = m->m_pkthdr.len; struct in_addr faddr, laddr; struct cmsghdr *cm; struct inpcbinfo *pcbinfo; struct sockaddr_in *sin, src; struct epoch_tracker et; int cscov_partial = 0; int error = 0; int ipflags = 0; u_short fport, lport; u_char tos; uint8_t pr; uint16_t cscov = 0; uint32_t flowid = 0; uint8_t flowtype = M_HASHTYPE_NONE; if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { if (control) m_freem(control); m_freem(m); return (EMSGSIZE); } src.sin_family = 0; sin = (struct sockaddr_in *)addr; /* * udp_output() may need to temporarily bind or connect the current * inpcb. As such, we don't know up front whether we will need the * pcbinfo lock or not. Do any work to decide what is needed up * front before acquiring any locks. * * We will need network epoch in either case, to safely lookup into * pcb hash. */ if (sin == NULL || (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0)) INP_WLOCK(inp); else INP_RLOCK(inp); NET_EPOCH_ENTER(et); tos = inp->inp_ip_tos; if (control != NULL) { /* * XXX: Currently, we assume all the optional information is * stored in a single mbuf. */ if (control->m_next) { m_freem(control); error = EINVAL; goto release; } for (; control->m_len > 0; control->m_data += CMSG_ALIGN(cm->cmsg_len), control->m_len -= CMSG_ALIGN(cm->cmsg_len)) { cm = mtod(control, struct cmsghdr *); if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0 || cm->cmsg_len > control->m_len) { error = EINVAL; break; } #ifdef INET6 error = udp_v4mapped_pktinfo(cm, &src, inp, flags); if (error != 0) break; #endif if (cm->cmsg_level != IPPROTO_IP) continue; switch (cm->cmsg_type) { case IP_SENDSRCADDR: if (cm->cmsg_len != CMSG_LEN(sizeof(struct in_addr))) { error = EINVAL; break; } bzero(&src, sizeof(src)); src.sin_family = AF_INET; src.sin_len = sizeof(src); src.sin_port = inp->inp_lport; src.sin_addr = *(struct in_addr *)CMSG_DATA(cm); break; case IP_TOS: if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) { error = EINVAL; break; } tos = *(u_char *)CMSG_DATA(cm); break; case IP_FLOWID: if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) { error = EINVAL; break; } flowid = *(uint32_t *) CMSG_DATA(cm); break; case IP_FLOWTYPE: if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) { error = EINVAL; break; } flowtype = *(uint32_t *) CMSG_DATA(cm); break; #ifdef RSS case IP_RSSBUCKETID: if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) { error = EINVAL; break; } /* This is just a placeholder for now */ break; #endif /* RSS */ default: error = ENOPROTOOPT; break; } if (error) break; } m_freem(control); control = NULL; } if (error) goto release; pr = inp->inp_socket->so_proto->pr_protocol; pcbinfo = udp_get_inpcbinfo(pr); /* * If the IP_SENDSRCADDR control message was specified, override the * source address for this datagram. Its use is invalidated if the * address thus specified is incomplete or clobbers other inpcbs. */ laddr = inp->inp_laddr; lport = inp->inp_lport; if (src.sin_family == AF_INET) { if ((lport == 0) || (laddr.s_addr == INADDR_ANY && src.sin_addr.s_addr == INADDR_ANY)) { error = EINVAL; goto release; } INP_HASH_WLOCK(pcbinfo); error = in_pcbbind_setup(inp, (struct sockaddr *)&src, &laddr.s_addr, &lport, td->td_ucred); INP_HASH_WUNLOCK(pcbinfo); if (error) goto release; } /* * If a UDP socket has been connected, then a local address/port will * have been selected and bound. * * If a UDP socket has not been connected to, then an explicit * destination address must be used, in which case a local * address/port may not have been selected and bound. */ if (sin != NULL) { INP_LOCK_ASSERT(inp); if (inp->inp_faddr.s_addr != INADDR_ANY) { error = EISCONN; goto release; } /* * Jail may rewrite the destination address, so let it do * that before we use it. */ error = prison_remote_ip4(td->td_ucred, &sin->sin_addr); if (error) goto release; /* * If a local address or port hasn't yet been selected, or if * the destination address needs to be rewritten due to using * a special INADDR_ constant, invoke in_pcbconnect_setup() * to do the heavy lifting. Once a port is selected, we * commit the binding back to the socket; we also commit the * binding of the address if in jail. * * If we already have a valid binding and we're not * requesting a destination address rewrite, use a fast path. */ if (inp->inp_laddr.s_addr == INADDR_ANY || inp->inp_lport == 0 || sin->sin_addr.s_addr == INADDR_ANY || sin->sin_addr.s_addr == INADDR_BROADCAST) { INP_HASH_WLOCK(pcbinfo); error = in_pcbconnect_setup(inp, addr, &laddr.s_addr, &lport, &faddr.s_addr, &fport, NULL, td->td_ucred); if (error) { INP_HASH_WUNLOCK(pcbinfo); goto release; } /* * XXXRW: Why not commit the port if the address is * !INADDR_ANY? */ /* Commit the local port if newly assigned. */ if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) { INP_WLOCK_ASSERT(inp); /* * Remember addr if jailed, to prevent * rebinding. */ if (prison_flag(td->td_ucred, PR_IP4)) inp->inp_laddr = laddr; inp->inp_lport = lport; error = in_pcbinshash(inp); INP_HASH_WUNLOCK(pcbinfo); if (error != 0) { inp->inp_lport = 0; error = EAGAIN; goto release; } inp->inp_flags |= INP_ANONPORT; } else INP_HASH_WUNLOCK(pcbinfo); } else { faddr = sin->sin_addr; fport = sin->sin_port; } } else { INP_LOCK_ASSERT(inp); faddr = inp->inp_faddr; fport = inp->inp_fport; if (faddr.s_addr == INADDR_ANY) { error = ENOTCONN; goto release; } } /* * Calculate data length and get a mbuf for UDP, IP, and possible * link-layer headers. Immediate slide the data pointer back forward * since we won't use that space at this layer. */ M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT); if (m == NULL) { error = ENOBUFS; goto release; } m->m_data += max_linkhdr; m->m_len -= max_linkhdr; m->m_pkthdr.len -= max_linkhdr; /* * Fill in mbuf with extended UDP header and addresses and length put * into network format. */ ui = mtod(m, struct udpiphdr *); bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */ ui->ui_v = IPVERSION << 4; ui->ui_pr = pr; ui->ui_src = laddr; ui->ui_dst = faddr; ui->ui_sport = lport; ui->ui_dport = fport; ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr)); if (pr == IPPROTO_UDPLITE) { struct udpcb *up; uint16_t plen; up = intoudpcb(inp); cscov = up->u_txcslen; plen = (u_short)len + sizeof(struct udphdr); if (cscov >= plen) cscov = 0; ui->ui_len = htons(plen); ui->ui_ulen = htons(cscov); /* * For UDP-Lite, checksum coverage length of zero means * the entire UDPLite packet is covered by the checksum. */ cscov_partial = (cscov == 0) ? 0 : 1; } /* * Set the Don't Fragment bit in the IP header. */ if (inp->inp_flags & INP_DONTFRAG) { struct ip *ip; ip = (struct ip *)&ui->ui_i; ip->ip_off |= htons(IP_DF); } if (inp->inp_socket->so_options & SO_DONTROUTE) ipflags |= IP_ROUTETOIF; if (inp->inp_socket->so_options & SO_BROADCAST) ipflags |= IP_ALLOWBROADCAST; if (inp->inp_flags & INP_ONESBCAST) ipflags |= IP_SENDONES; #ifdef MAC mac_inpcb_create_mbuf(inp, m); #endif /* * Set up checksum and output datagram. */ ui->ui_sum = 0; if (pr == IPPROTO_UDPLITE) { if (inp->inp_flags & INP_ONESBCAST) faddr.s_addr = INADDR_BROADCAST; if (cscov_partial) { if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0) ui->ui_sum = 0xffff; } else { if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0) ui->ui_sum = 0xffff; } } else if (V_udp_cksum) { if (inp->inp_flags & INP_ONESBCAST) faddr.s_addr = INADDR_BROADCAST; ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr, htons((u_short)len + sizeof(struct udphdr) + pr)); m->m_pkthdr.csum_flags = CSUM_UDP; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); } ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len); ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */ ((struct ip *)ui)->ip_tos = tos; /* XXX */ UDPSTAT_INC(udps_opackets); /* * Setup flowid / RSS information for outbound socket. * * Once the UDP code decides to set a flowid some other way, * this allows the flowid to be overridden by userland. */ if (flowtype != M_HASHTYPE_NONE) { m->m_pkthdr.flowid = flowid; M_HASHTYPE_SET(m, flowtype); } #if defined(ROUTE_MPATH) || defined(RSS) else if (CALC_FLOWID_OUTBOUND_SENDTO) { uint32_t hash_val, hash_type; hash_val = fib4_calc_packet_hash(laddr, faddr, lport, fport, pr, &hash_type); m->m_pkthdr.flowid = hash_val; M_HASHTYPE_SET(m, hash_type); } /* * Don't override with the inp cached flowid value. * * Depending upon the kind of send being done, the inp * flowid/flowtype values may actually not be appropriate * for this particular socket send. * * We should either leave the flowid at zero (which is what is * currently done) or set it to some software generated * hash value based on the packet contents. */ ipflags |= IP_NODEFAULTFLOWID; #endif /* RSS */ if (pr == IPPROTO_UDPLITE) UDPLITE_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u); else UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u); error = ip_output(m, inp->inp_options, INP_WLOCKED(inp) ? &inp->inp_route : NULL, ipflags, inp->inp_moptions, inp); INP_UNLOCK(inp); NET_EPOCH_EXIT(et); return (error); release: INP_UNLOCK(inp); NET_EPOCH_EXIT(et); m_freem(m); return (error); } pr_abort_t udp_abort; /* shared with udp6_usrreq.c */ void udp_abort(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_abort: inp == NULL")); INP_WLOCK(inp); if (inp->inp_faddr.s_addr != INADDR_ANY) { INP_HASH_WLOCK(pcbinfo); in_pcbdisconnect(inp); inp->inp_laddr.s_addr = INADDR_ANY; INP_HASH_WUNLOCK(pcbinfo); soisdisconnected(so); } INP_WUNLOCK(inp); } static int udp_attach(struct socket *so, int proto, struct thread *td) { static uint32_t udp_flowid; struct inpcb *inp; struct inpcbinfo *pcbinfo; int error; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp == NULL, ("udp_attach: inp != NULL")); error = soreserve(so, udp_sendspace, udp_recvspace); if (error) return (error); error = in_pcballoc(so, pcbinfo); if (error) return (error); inp = sotoinpcb(so); inp->inp_ip_ttl = V_ip_defttl; inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1); inp->inp_flowtype = M_HASHTYPE_OPAQUE; error = udp_newudpcb(inp); if (error) { in_pcbdetach(inp); in_pcbfree(inp); return (error); } INP_WUNLOCK(inp); return (0); } #endif /* INET */ int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx) { struct inpcb *inp; struct udpcb *up; KASSERT(so->so_type == SOCK_DGRAM, ("udp_set_kernel_tunneling: !dgram")); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL")); INP_WLOCK(inp); up = intoudpcb(inp); if ((f != NULL || i != NULL) && ((up->u_tun_func != NULL) || (up->u_icmp_func != NULL))) { INP_WUNLOCK(inp); return (EBUSY); } up->u_tun_func = f; up->u_icmp_func = i; up->u_tun_ctx = ctx; INP_WUNLOCK(inp); return (0); } #ifdef INET static int udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td) { struct inpcb *inp; struct inpcbinfo *pcbinfo; struct sockaddr_in *sinp; int error; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_bind: inp == NULL")); sinp = (struct sockaddr_in *)nam; if (nam->sa_family != AF_INET) { /* * Preserve compatibility with old programs. */ if (nam->sa_family != AF_UNSPEC || nam->sa_len < offsetof(struct sockaddr_in, sin_zero) || sinp->sin_addr.s_addr != INADDR_ANY) return (EAFNOSUPPORT); nam->sa_family = AF_INET; } if (nam->sa_len != sizeof(struct sockaddr_in)) return (EINVAL); INP_WLOCK(inp); INP_HASH_WLOCK(pcbinfo); error = in_pcbbind(inp, nam, td->td_ucred); INP_HASH_WUNLOCK(pcbinfo); INP_WUNLOCK(inp); return (error); } static void udp_close(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_close: inp == NULL")); INP_WLOCK(inp); if (inp->inp_faddr.s_addr != INADDR_ANY) { INP_HASH_WLOCK(pcbinfo); in_pcbdisconnect(inp); inp->inp_laddr.s_addr = INADDR_ANY; INP_HASH_WUNLOCK(pcbinfo); soisdisconnected(so); } INP_WUNLOCK(inp); } static int udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td) { struct epoch_tracker et; struct inpcb *inp; struct inpcbinfo *pcbinfo; struct sockaddr_in *sin; int error; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_connect: inp == NULL")); sin = (struct sockaddr_in *)nam; if (sin->sin_family != AF_INET) return (EAFNOSUPPORT); if (sin->sin_len != sizeof(*sin)) return (EINVAL); INP_WLOCK(inp); if (inp->inp_faddr.s_addr != INADDR_ANY) { INP_WUNLOCK(inp); return (EISCONN); } error = prison_remote_ip4(td->td_ucred, &sin->sin_addr); if (error != 0) { INP_WUNLOCK(inp); return (error); } NET_EPOCH_ENTER(et); INP_HASH_WLOCK(pcbinfo); error = in_pcbconnect(inp, nam, td->td_ucred, true); INP_HASH_WUNLOCK(pcbinfo); NET_EPOCH_EXIT(et); if (error == 0) soisconnected(so); INP_WUNLOCK(inp); return (error); } static void udp_detach(struct socket *so) { struct inpcb *inp; struct udpcb *up; inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_detach: inp == NULL")); KASSERT(inp->inp_faddr.s_addr == INADDR_ANY, ("udp_detach: not disconnected")); INP_WLOCK(inp); up = intoudpcb(inp); KASSERT(up != NULL, ("%s: up == NULL", __func__)); inp->inp_ppcb = NULL; in_pcbdetach(inp); in_pcbfree(inp); udp_discardcb(up); } pr_disconnect_t udp_disconnect; /* shared with udp6_usrreq.c */ int udp_disconnect(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_disconnect: inp == NULL")); INP_WLOCK(inp); if (inp->inp_faddr.s_addr == INADDR_ANY) { INP_WUNLOCK(inp); return (ENOTCONN); } INP_HASH_WLOCK(pcbinfo); in_pcbdisconnect(inp); inp->inp_laddr.s_addr = INADDR_ANY; INP_HASH_WUNLOCK(pcbinfo); SOCK_LOCK(so); so->so_state &= ~SS_ISCONNECTED; /* XXX */ SOCK_UNLOCK(so); INP_WUNLOCK(inp); return (0); } pr_send_t udp_send; /* shared with udp6_usrreq.c */ int udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *td) { struct inpcb *inp; int error; inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_send: inp == NULL")); if (addr != NULL) { error = 0; if (addr->sa_family != AF_INET) error = EAFNOSUPPORT; else if (addr->sa_len != sizeof(struct sockaddr_in)) error = EINVAL; if (__predict_false(error != 0)) { m_freem(control); m_freem(m); return (error); } } return (udp_output(inp, m, addr, control, td, flags)); } #endif /* INET */ int udp_shutdown(struct socket *so) { struct inpcb *inp; inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp_shutdown: inp == NULL")); INP_WLOCK(inp); socantsendmore(so); INP_WUNLOCK(inp); return (0); } #ifdef INET #define UDP_PROTOSW \ .pr_type = SOCK_DGRAM, \ .pr_flags = PR_ATOMIC | PR_ADDR | PR_CAPATTACH, \ .pr_ctloutput = udp_ctloutput, \ .pr_abort = udp_abort, \ .pr_attach = udp_attach, \ .pr_bind = udp_bind, \ .pr_connect = udp_connect, \ .pr_control = in_control, \ .pr_detach = udp_detach, \ .pr_disconnect = udp_disconnect, \ .pr_peeraddr = in_getpeeraddr, \ .pr_send = udp_send, \ .pr_soreceive = soreceive_dgram, \ .pr_sosend = sosend_dgram, \ .pr_shutdown = udp_shutdown, \ .pr_sockaddr = in_getsockaddr, \ .pr_sosetlabel = in_pcbsosetlabel, \ .pr_close = udp_close struct protosw udp_protosw = { .pr_protocol = IPPROTO_UDP, UDP_PROTOSW }; struct protosw udplite_protosw = { .pr_protocol = IPPROTO_UDPLITE, UDP_PROTOSW }; static void udp_init(void *arg __unused) { IPPROTO_REGISTER(IPPROTO_UDP, udp_input, udp_ctlinput); IPPROTO_REGISTER(IPPROTO_UDPLITE, udp_input, udplite_ctlinput); } SYSINIT(udp_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp_init, NULL); #endif /* INET */ diff --git a/sys/netinet6/sctp6_usrreq.c b/sys/netinet6/sctp6_usrreq.c index 5a771b19bdb8..1d3a35b2bdef 100644 --- a/sys/netinet6/sctp6_usrreq.c +++ b/sys/netinet6/sctp6_usrreq.c @@ -1,1223 +1,1211 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * a) Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * b) Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. * * c) Neither the name of Cisco Systems, Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #ifdef INET6 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) { struct mbuf *m; int iphlen; uint32_t vrf_id; uint8_t ecn_bits; struct sockaddr_in6 src, dst; struct ip6_hdr *ip6; struct sctphdr *sh; struct sctp_chunkhdr *ch; int length, offset; uint8_t compute_crc; uint32_t mflowid; uint8_t mflowtype; uint16_t fibnum; iphlen = *offp; if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { SCTP_RELEASE_PKT(*i_pak); return (IPPROTO_DONE); } m = SCTP_HEADER_TO_CHAIN(*i_pak); #ifdef SCTP_MBUF_LOGGING /* Log in any input mbufs */ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { sctp_log_mbc(m, SCTP_MBUF_INPUT); } #endif #ifdef SCTP_PACKET_LOGGING if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { sctp_packet_log(m); } #endif SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", m->m_pkthdr.len, if_name(m->m_pkthdr.rcvif), (int)m->m_pkthdr.csum_flags, CSUM_BITS); mflowid = m->m_pkthdr.flowid; mflowtype = M_HASHTYPE_GET(m); fibnum = M_GETFIB(m); SCTP_STAT_INCR(sctps_recvpackets); SCTP_STAT_INCR_COUNTER64(sctps_inpackets); /* Get IP, SCTP, and first chunk header together in the first mbuf. */ offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); if (m->m_len < offset) { m = m_pullup(m, offset); if (m == NULL) { SCTP_STAT_INCR(sctps_hdrops); return (IPPROTO_DONE); } } ip6 = mtod(m, struct ip6_hdr *); sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen); ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); offset -= sizeof(struct sctp_chunkhdr); memset(&src, 0, sizeof(struct sockaddr_in6)); src.sin6_family = AF_INET6; src.sin6_len = sizeof(struct sockaddr_in6); src.sin6_port = sh->src_port; src.sin6_addr = ip6->ip6_src; if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { goto out; } memset(&dst, 0, sizeof(struct sockaddr_in6)); dst.sin6_family = AF_INET6; dst.sin6_len = sizeof(struct sockaddr_in6); dst.sin6_port = sh->dest_port; dst.sin6_addr = ip6->ip6_dst; if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { goto out; } length = ntohs(ip6->ip6_plen) + iphlen; /* Validate mbuf chain length with IP payload length. */ if (SCTP_HEADER_LEN(m) != length) { SCTPDBG(SCTP_DEBUG_INPUT1, "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); SCTP_STAT_INCR(sctps_hdrops); goto out; } if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { goto out; } ecn_bits = IPV6_TRAFFIC_CLASS(ip6); if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { SCTP_STAT_INCR(sctps_recvhwcrc); compute_crc = 0; } else { SCTP_STAT_INCR(sctps_recvswcrc); compute_crc = 1; } sctp_common_input_processing(&m, iphlen, offset, length, (struct sockaddr *)&src, (struct sockaddr *)&dst, sh, ch, compute_crc, ecn_bits, mflowtype, mflowid, fibnum, vrf_id, port); out: if (m) { sctp_m_freem(m); } return (IPPROTO_DONE); } int sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) { return (sctp6_input_with_port(i_pak, offp, 0)); } void sctp6_notify(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint8_t icmp6_type, uint8_t icmp6_code, uint32_t next_mtu) { int timer_stopped; switch (icmp6_type) { case ICMP6_DST_UNREACH: if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { /* Mark the net unreachable. */ if (net->dest_state & SCTP_ADDR_REACHABLE) { /* Ok that destination is not reachable */ net->dest_state &= ~SCTP_ADDR_REACHABLE; net->dest_state &= ~SCTP_ADDR_PF; sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); } } SCTP_TCB_UNLOCK(stcb); break; case ICMP6_PARAM_PROB: /* Treat it like an ABORT. */ if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED); (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); } else { SCTP_TCB_UNLOCK(stcb); } break; case ICMP6_PACKET_TOO_BIG: if (net->dest_state & SCTP_ADDR_NO_PMTUD) { SCTP_TCB_UNLOCK(stcb); break; } if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { timer_stopped = 1; sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); } else { timer_stopped = 0; } /* Update the path MTU. */ if (net->port) { next_mtu -= sizeof(struct udphdr); } if (net->mtu > next_mtu) { net->mtu = next_mtu; if (net->port) { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); } else { sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); } } /* Update the association MTU */ if (stcb->asoc.smallest_mtu > next_mtu) { sctp_pathmtu_adjustment(stcb, next_mtu, true); } /* Finally, start the PMTU timer if it was running before. */ if (timer_stopped) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); } SCTP_TCB_UNLOCK(stcb); break; default: SCTP_TCB_UNLOCK(stcb); break; } } void sctp6_ctlinput(int cmd, struct sockaddr_in6 *pktdst, struct ip6ctlparam *ip6cp) { struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; struct sctphdr sh; struct sockaddr_in6 src, dst; - if ((unsigned)cmd >= PRC_NCMDS) { + if (inet6ctlerrmap[cmd] == 0) return; - } - if (PRC_IS_REDIRECT(cmd)) { - ip6cp = NULL; - } else if (inet6ctlerrmap[cmd] == 0) { + + if (ip6cp->ip6c_m == NULL) { return; } - if (ip6cp != NULL) { - /* - * XXX: We assume that when IPV6 is non NULL, M and OFF are - * valid. - */ - if (ip6cp->ip6c_m == NULL) { - return; - } - - /* - * Check if we can safely examine the ports and the - * verification tag of the SCTP common header. - */ - if (ip6cp->ip6c_m->m_pkthdr.len < - (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { - return; - } + /* + * Check if we can safely examine the ports and the + * verification tag of the SCTP common header. + */ + if (ip6cp->ip6c_m->m_pkthdr.len < + (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { + return; + } - /* Copy out the port numbers and the verification tag. */ - memset(&sh, 0, sizeof(sh)); - m_copydata(ip6cp->ip6c_m, - ip6cp->ip6c_off, - sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), - (caddr_t)&sh); - memset(&src, 0, sizeof(struct sockaddr_in6)); - src.sin6_family = AF_INET6; - src.sin6_len = sizeof(struct sockaddr_in6); - src.sin6_port = sh.src_port; - src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; - if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { - return; - } - memset(&dst, 0, sizeof(struct sockaddr_in6)); - dst.sin6_family = AF_INET6; - dst.sin6_len = sizeof(struct sockaddr_in6); - dst.sin6_port = sh.dest_port; - dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; - if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { - return; - } - inp = NULL; - net = NULL; - stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, - (struct sockaddr *)&src, - &inp, &net, 1, SCTP_DEFAULT_VRFID); - if ((stcb != NULL) && - (net != NULL) && - (inp != NULL)) { - /* Check the verification tag */ - if (ntohl(sh.v_tag) != 0) { + /* Copy out the port numbers and the verification tag. */ + memset(&sh, 0, sizeof(sh)); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off, + sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), + (caddr_t)&sh); + memset(&src, 0, sizeof(struct sockaddr_in6)); + src.sin6_family = AF_INET6; + src.sin6_len = sizeof(struct sockaddr_in6); + src.sin6_port = sh.src_port; + src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; + if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { + return; + } + memset(&dst, 0, sizeof(struct sockaddr_in6)); + dst.sin6_family = AF_INET6; + dst.sin6_len = sizeof(struct sockaddr_in6); + dst.sin6_port = sh.dest_port; + dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; + if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { + return; + } + inp = NULL; + net = NULL; + stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, + (struct sockaddr *)&src, + &inp, &net, 1, SCTP_DEFAULT_VRFID); + if ((stcb != NULL) && + (net != NULL) && + (inp != NULL)) { + /* Check the verification tag */ + if (ntohl(sh.v_tag) != 0) { + /* + * This must be the verification tag used + * for sending out packets. We don't + * consider packets reflecting the + * verification tag. + */ + if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { + if (ip6cp->ip6c_m->m_pkthdr.len >= + ip6cp->ip6c_off + sizeof(struct sctphdr) + + sizeof(struct sctp_chunkhdr) + + offsetof(struct sctp_init, a_rwnd)) { /* - * This must be the verification tag used - * for sending out packets. We don't - * consider packets reflecting the - * verification tag. + * In this case we can check if we + * got an INIT chunk and if the + * initiate tag matches. */ - if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { + uint32_t initiate_tag; + uint8_t chunk_type; + + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + + sizeof(struct sctphdr), + sizeof(uint8_t), + (caddr_t)&chunk_type); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + + sizeof(struct sctphdr) + + sizeof(struct sctp_chunkhdr), + sizeof(uint32_t), + (caddr_t)&initiate_tag); + if ((chunk_type != SCTP_INITIATION) || + (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { SCTP_TCB_UNLOCK(stcb); return; } } else { - if (ip6cp->ip6c_m->m_pkthdr.len >= - ip6cp->ip6c_off + sizeof(struct sctphdr) + - sizeof(struct sctp_chunkhdr) + - offsetof(struct sctp_init, a_rwnd)) { - /* - * In this case we can check if we - * got an INIT chunk and if the - * initiate tag matches. - */ - uint32_t initiate_tag; - uint8_t chunk_type; - - m_copydata(ip6cp->ip6c_m, - ip6cp->ip6c_off + - sizeof(struct sctphdr), - sizeof(uint8_t), - (caddr_t)&chunk_type); - m_copydata(ip6cp->ip6c_m, - ip6cp->ip6c_off + - sizeof(struct sctphdr) + - sizeof(struct sctp_chunkhdr), - sizeof(uint32_t), - (caddr_t)&initiate_tag); - if ((chunk_type != SCTP_INITIATION) || - (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { - SCTP_TCB_UNLOCK(stcb); - return; - } - } else { - SCTP_TCB_UNLOCK(stcb); - return; - } - } - sctp6_notify(inp, stcb, net, - ip6cp->ip6c_icmp6->icmp6_type, - ip6cp->ip6c_icmp6->icmp6_code, - ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); - } else { - if ((stcb == NULL) && (inp != NULL)) { - /* reduce inp's ref-count */ - SCTP_INP_WLOCK(inp); - SCTP_INP_DECR_REF(inp); - SCTP_INP_WUNLOCK(inp); - } - if (stcb) { SCTP_TCB_UNLOCK(stcb); + return; } } + sctp6_notify(inp, stcb, net, + ip6cp->ip6c_icmp6->icmp6_type, + ip6cp->ip6c_icmp6->icmp6_code, + ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); + } else { + if ((stcb == NULL) && (inp != NULL)) { + /* reduce inp's ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } } } /* * this routine can probably be collasped into the one in sctp_userreq.c * since they do the same thing and now we lookup with a sockaddr */ static int sctp6_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in6 addrs[2]; struct sctp_inpcb *inp; struct sctp_nets *net; struct sctp_tcb *stcb; int error; uint32_t vrf_id; vrf_id = SCTP_DEFAULT_VRFID; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); if (req->newlen != sizeof(addrs)) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (req->oldlen != sizeof(struct ucred)) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), sin6tosa(&addrs[0]), &inp, &net, 1, vrf_id); if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { if ((inp != NULL) && (stcb == NULL)) { /* reduce ref-count */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); goto cred_can_cont; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); error = ENOENT; goto out; } SCTP_TCB_UNLOCK(stcb); /* * We use the write lock here, only since in the error leg we need * it. If we used RLOCK, then we would have to * wlock/decr/unlock/rlock. Which in theory could create a hole. * Better to use higher wlock. */ SCTP_INP_WLOCK(inp); cred_can_cont: error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); if (error) { SCTP_INP_WUNLOCK(inp); goto out; } cru2x(inp->sctp_socket->so_cred, &xuc); SCTP_INP_WUNLOCK(inp); error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); out: return (error); } SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0, sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); /* This is the same as the sctp_abort() could be made common */ static void sctp6_abort(struct socket *so) { struct epoch_tracker et; struct sctp_inpcb *inp; uint32_t flags; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return; } NET_EPOCH_ENTER(et); sctp_must_try_again: flags = inp->sctp_flags; #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 17); #endif if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 16); #endif sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, SCTP_CALLED_AFTER_CMPSET_OFCLOSE); SOCK_LOCK(so); SCTP_SB_CLEAR(so->so_snd); /* * same for the rcv ones, they are only here for the * accounting/select. */ SCTP_SB_CLEAR(so->so_rcv); /* Now null out the reference, we are completely detached. */ so->so_pcb = NULL; SOCK_UNLOCK(so); } else { flags = inp->sctp_flags; if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { goto sctp_must_try_again; } } NET_EPOCH_EXIT(et); return; } static int sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) { int error; struct sctp_inpcb *inp; uint32_t vrf_id = SCTP_DEFAULT_VRFID; inp = (struct sctp_inpcb *)so->so_pcb; if (inp != NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); if (error) return (error); } error = sctp_inpcb_alloc(so, vrf_id); if (error) return (error); inp = (struct sctp_inpcb *)so->so_pcb; SCTP_INP_WLOCK(inp); inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ inp->ip_inp.inp.inp_vflag |= INP_IPV6; inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ #ifdef INET /* * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 * socket as well, because the socket may be bound to an IPv6 * wildcard address, which may match an IPv4-mapped IPv6 address. */ inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); #endif SCTP_INP_WUNLOCK(inp); return (0); } static int sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) { struct sctp_inpcb *inp; int error; u_char vflagsav; inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (addr) { switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } vflagsav = inp->ip_inp.inp.inp_vflag; inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; inp->ip_inp.inp.inp_vflag |= INP_IPV6; if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { switch (addr->sa_family) { #ifdef INET case AF_INET: /* binding v4 addr to v6 socket, so reset flags */ inp->ip_inp.inp.inp_vflag |= INP_IPV4; inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; break; #endif #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6_p; sin6_p = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { inp->ip_inp.inp.inp_vflag |= INP_IPV4; } #ifdef INET if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { struct sockaddr_in sin; in6_sin6_2_sin(&sin, sin6_p); inp->ip_inp.inp.inp_vflag |= INP_IPV4; inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); goto out; } #endif break; } #endif default: break; } } else if (addr != NULL) { struct sockaddr_in6 *sin6_p; /* IPV6_V6ONLY socket */ #ifdef INET if (addr->sa_family == AF_INET) { /* can't bind v4 addr to v6 only socket! */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); error = EINVAL; goto out; } #endif sin6_p = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { /* can't bind v4-mapped addrs either! */ /* NOTE: we don't support SIIT */ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); error = EINVAL; goto out; } } error = sctp_inpcb_bind(so, addr, NULL, p); out: if (error != 0) inp->ip_inp.inp.inp_vflag = vflagsav; return (error); } static void sctp6_close(struct socket *so) { sctp_close(so); } /* This could be made common with sctp_detach() since they are identical */ static int sctp6_disconnect(struct socket *so) { return (sctp_disconnect(so)); } int sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p); static int sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *p) { struct sctp_inpcb *inp; #ifdef INET struct sockaddr_in6 *sin6; #endif /* INET */ /* No SPL needed since sctp_output does this */ inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* * For the TCP model we may get a NULL addr, if we are a connected * socket thats ok. */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && (addr == NULL)) { goto connected_type; } if (addr == NULL) { SCTP_RELEASE_PKT(m); if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); return (EDESTADDRREQ); } switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } #ifdef INET sin6 = (struct sockaddr_in6 *)addr; if (SCTP_IPV6_V6ONLY(inp)) { /* * if IPV6_V6ONLY flag, we discard datagrams destined to a * v4 addr or v4-mapped addr */ if (addr->sa_family == AF_INET) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { if (control) { SCTP_RELEASE_PKT(control); control = NULL; } SCTP_RELEASE_PKT(m); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } if ((addr->sa_family == AF_INET6) && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { struct sockaddr_in sin; /* convert v4-mapped into v4 addr and send */ in6_sin6_2_sin(&sin, sin6); return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); } #endif /* INET */ connected_type: /* now what about control */ if (control) { if (inp->control) { SCTP_PRINTF("huh? control set?\n"); SCTP_RELEASE_PKT(inp->control); inp->control = NULL; } inp->control = control; } /* Place the data */ if (inp->pkt) { SCTP_BUF_NEXT(inp->pkt_last) = m; inp->pkt_last = m; } else { inp->pkt_last = inp->pkt = m; } if ( /* FreeBSD and MacOSX uses a flag passed */ ((flags & PRUS_MORETOCOME) == 0) ) { /* * note with the current version this code will only be used * by OpenBSD, NetBSD and FreeBSD have methods for * re-defining sosend() to use sctp_sosend(). One can * optionaly switch back to this code (by changing back the * defininitions but this is not advisable. */ struct epoch_tracker et; int ret; NET_EPOCH_ENTER(et); ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); NET_EPOCH_EXIT(et); inp->pkt = NULL; inp->control = NULL; return (ret); } else { return (0); } } static int sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) { struct epoch_tracker et; uint32_t vrf_id; int error = 0; struct sctp_inpcb *inp; struct sctp_tcb *stcb; #ifdef INET struct sockaddr_in6 *sin6; union sctp_sockstore store; #endif inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); /* I made the same as TCP since we are * not setup? */ } if (addr == NULL) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } switch (addr->sa_family) { #ifdef INET case AF_INET: if (addr->sa_len != sizeof(struct sockaddr_in)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif #ifdef INET6 case AF_INET6: if (addr->sa_len != sizeof(struct sockaddr_in6)) { SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } break; #endif default: SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } vrf_id = inp->def_vrf_id; SCTP_ASOC_CREATE_LOCK(inp); SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == SCTP_PCB_FLAGS_UNBOUND) { /* Bind a ephemeral port */ SCTP_INP_RUNLOCK(inp); error = sctp6_bind(so, NULL, p); if (error) { SCTP_ASOC_CREATE_UNLOCK(inp); return (error); } SCTP_INP_RLOCK(inp); } if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { /* We are already connected AND the TCP model */ SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); return (EADDRINUSE); } #ifdef INET sin6 = (struct sockaddr_in6 *)addr; if (SCTP_IPV6_V6ONLY(inp)) { /* * if IPV6_V6ONLY flag, ignore connections destined to a v4 * addr or v4-mapped addr */ if (addr->sa_family == AF_INET) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { SCTP_INP_RUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } } if ((addr->sa_family == AF_INET6) && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* convert v4-mapped into v4 addr */ in6_sin6_2_sin(&store.sin, sin6); addr = &store.sa; } #endif /* INET */ /* Now do we connect? */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); } else { SCTP_INP_RUNLOCK(inp); SCTP_INP_WLOCK(inp); SCTP_INP_INCR_REF(inp); SCTP_INP_WUNLOCK(inp); stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); if (stcb == NULL) { SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } } if (stcb != NULL) { /* Already have or am bring up an association */ SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_TCB_UNLOCK(stcb); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); return (EALREADY); } /* We are GOOD to go */ stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, inp->sctp_ep.port, p, SCTP_INITIALIZE_AUTH_PARAMS); SCTP_ASOC_CREATE_UNLOCK(inp); if (stcb == NULL) { /* Gak! no memory */ return (error); } SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); NET_EPOCH_ENTER(et); sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); SCTP_TCB_UNLOCK(stcb); NET_EPOCH_EXIT(et); return (error); } static int sctp6_getaddr(struct socket *so, struct sockaddr **addr) { struct sockaddr_in6 *sin6; struct sctp_inpcb *inp; uint32_t vrf_id; struct sctp_ifa *sctp_ifa; int error; /* * Do the malloc first in case it blocks. */ SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); if (sin6 == NULL) return (ENOMEM); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); inp = (struct sctp_inpcb *)so->so_pcb; if (inp == NULL) { SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); } SCTP_INP_RLOCK(inp); sin6->sin6_port = inp->sctp_lport; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* For the bound all case you get back 0 */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { struct sctp_tcb *stcb; struct sockaddr_in6 *sin_a6; struct sctp_nets *net; int fnd; stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { SCTP_INP_RUNLOCK(inp); SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } fnd = 0; sin_a6 = NULL; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; if (sin_a6 == NULL) /* this will make coverity happy */ continue; if (sin_a6->sin6_family == AF_INET6) { fnd = 1; break; } } if ((!fnd) || (sin_a6 == NULL)) { /* punt */ SCTP_INP_RUNLOCK(inp); SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } vrf_id = inp->def_vrf_id; sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); if (sctp_ifa) { sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; } } else { /* For the bound all case you get back 0 */ memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); } } else { /* Take the first IPv6 address in the list */ struct sctp_laddr *laddr; int fnd = 0; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa->address.sa.sa_family == AF_INET6) { struct sockaddr_in6 *sin_a; sin_a = &laddr->ifa->address.sin6; sin6->sin6_addr = sin_a->sin6_addr; fnd = 1; break; } } if (!fnd) { SCTP_FREE_SONAME(sin6); SCTP_INP_RUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } } SCTP_INP_RUNLOCK(inp); /* Scoping things for v6 */ if ((error = sa6_recoverscope(sin6)) != 0) { SCTP_FREE_SONAME(sin6); return (error); } (*addr) = (struct sockaddr *)sin6; return (0); } static int sctp6_peeraddr(struct socket *so, struct sockaddr **addr) { struct sockaddr_in6 *sin6; int fnd; struct sockaddr_in6 *sin_a6; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; int error; /* Do the malloc first in case it blocks. */ SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); if (sin6 == NULL) return (ENOMEM); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); inp = (struct sctp_inpcb *)so->so_pcb; if ((inp == NULL) || ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { /* UDP type and listeners will drop out here */ SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); return (ENOTCONN); } SCTP_INP_RLOCK(inp); stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(inp); if (stcb == NULL) { SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); return (ECONNRESET); } fnd = 0; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; if (sin_a6->sin6_family == AF_INET6) { fnd = 1; sin6->sin6_port = stcb->rport; sin6->sin6_addr = sin_a6->sin6_addr; break; } } SCTP_TCB_UNLOCK(stcb); if (!fnd) { /* No IPv4 address */ SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); return (ENOENT); } if ((error = sa6_recoverscope(sin6)) != 0) { SCTP_FREE_SONAME(sin6); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); return (error); } *addr = (struct sockaddr *)sin6; return (0); } static int sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) { struct inpcb *inp = sotoinpcb(so); int error; if (inp == NULL) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* allow v6 addresses precedence */ error = sctp6_getaddr(so, nam); #ifdef INET if (error) { struct sockaddr_in6 *sin6; /* try v4 next if v6 failed */ error = sctp_ingetaddr(so, nam); if (error) { return (error); } SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); if (sin6 == NULL) { SCTP_FREE_SONAME(*nam); return (ENOMEM); } in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); SCTP_FREE_SONAME(*nam); *nam = (struct sockaddr *)sin6; } #endif return (error); } static int sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) { struct inpcb *inp = sotoinpcb(so); int error; if (inp == NULL) { SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); return (EINVAL); } /* allow v6 addresses precedence */ error = sctp6_peeraddr(so, nam); #ifdef INET if (error) { struct sockaddr_in6 *sin6; /* try v4 next if v6 failed */ error = sctp_peeraddr(so, nam); if (error) { return (error); } SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); if (sin6 == NULL) { SCTP_FREE_SONAME(*nam); return (ENOMEM); } in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); SCTP_FREE_SONAME(*nam); *nam = (struct sockaddr *)sin6; } #endif return (error); } #define SCTP6_PROTOSW \ .pr_protocol = IPPROTO_SCTP, \ .pr_ctloutput = sctp_ctloutput, \ .pr_abort = sctp6_abort, \ .pr_accept = sctp_accept, \ .pr_attach = sctp6_attach, \ .pr_bind = sctp6_bind, \ .pr_connect = sctp6_connect, \ .pr_control = in6_control, \ .pr_close = sctp6_close, \ .pr_detach = sctp6_close, \ .pr_sopoll = sopoll_generic, \ .pr_flush = sctp_flush, \ .pr_disconnect = sctp6_disconnect, \ .pr_listen = sctp_listen, \ .pr_peeraddr = sctp6_getpeeraddr, \ .pr_send = sctp6_send, \ .pr_shutdown = sctp_shutdown, \ .pr_sockaddr = sctp6_in6getaddr, \ .pr_sosend = sctp_sosend, \ .pr_soreceive = sctp_soreceive struct protosw sctp6_seqpacket_protosw = { .pr_type = SOCK_SEQPACKET, .pr_flags = PR_WANTRCVD, SCTP6_PROTOSW }; struct protosw sctp6_stream_protosw = { .pr_type = SOCK_STREAM, .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, SCTP6_PROTOSW }; #endif diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c index f7f737f7e051..f387724ad997 100644 --- a/sys/netinet6/udp6_usrreq.c +++ b/sys/netinet6/udp6_usrreq.c @@ -1,1354 +1,1322 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * Copyright (c) 2010-2011 Juniper Networks, Inc. * Copyright (c) 2014 Kevin Lo * All rights reserved. * * Portions of this software were developed by Robert N. M. Watson under * contract to Juniper Networks, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $ */ /*- * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 * The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_route.h" #include "opt_rss.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include VNET_DEFINE(int, zero_checksum_port) = 0; #define V_zero_checksum_port VNET(zero_checksum_port) SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(zero_checksum_port), 0, "Zero UDP checksum allowed for traffic to/from this port."); /* netinet/udp_usrreqs.c */ pr_abort_t udp_abort; pr_disconnect_t udp_disconnect; pr_send_t udp_send; /* * UDP protocol implementation. * Per RFC 768, August, 1980. */ static void udp6_detach(struct socket *so); static int udp6_append(struct inpcb *inp, struct mbuf *n, int off, struct sockaddr_in6 *fromsa) { struct socket *so; struct mbuf *opts = NULL, *tmp_opts; struct udpcb *up; bool filtered; INP_LOCK_ASSERT(inp); /* * Engage the tunneling protocol. */ up = intoudpcb(inp); if (up->u_tun_func != NULL) { in_pcbref(inp); INP_RUNLOCK(inp); filtered = (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&fromsa[0], up->u_tun_ctx); INP_RLOCK(inp); if (filtered) return (in_pcbrele_rlocked(inp)); } #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* Check AH/ESP integrity. */ if (IPSEC_ENABLED(ipv6)) { if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) { m_freem(n); return (0); } } #endif /* IPSEC */ #ifdef MAC if (mac_inpcb_check_deliver(inp, n) != 0) { m_freem(n); return (0); } #endif opts = NULL; if (inp->inp_flags & INP_CONTROLOPTS || inp->inp_socket->so_options & SO_TIMESTAMP) ip6_savecontrol(inp, n, &opts); if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) { tmp_opts = sbcreatecontrol(&fromsa[1], sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, IPPROTO_IPV6, M_NOWAIT); if (tmp_opts) { if (opts) { tmp_opts->m_next = opts; opts = tmp_opts; } else opts = tmp_opts; } } m_adj(n, off + sizeof(struct udphdr)); so = inp->inp_socket; SOCKBUF_LOCK(&so->so_rcv); if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n, opts) == 0) { soroverflow_locked(so); m_freem(n); if (opts) m_freem(opts); UDPSTAT_INC(udps_fullsock); } else sorwakeup_locked(so); return (0); } struct udp6_multi_match_ctx { struct ip6_hdr *ip6; struct udphdr *uh; }; static bool udp6_multi_match(const struct inpcb *inp, void *v) { struct udp6_multi_match_ctx *ctx = v; if ((inp->inp_vflag & INP_IPV6) == 0) return(false); if (inp->inp_lport != ctx->uh->uh_dport) return(false); if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport) return(false); if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst)) return (false); if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) || inp->inp_fport != ctx->uh->uh_sport)) return (false); return (true); } static int udp6_multi_input(struct mbuf *m, int off, int proto, struct sockaddr_in6 *fromsa) { struct udp6_multi_match_ctx ctx; struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto), INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx); struct inpcb *inp; struct ip6_moptions *imo; struct mbuf *n; int appends = 0; /* * In the event that laddr should be set to the link-local * address (this happens in RIPng), the multicast address * specified in the received packet will not match laddr. To * handle this situation, matching is relaxed if the * receiving interface is the same as one specified in the * socket and if the destination multicast address matches * one of the multicast groups specified in the socket. */ /* * KAME note: traditionally we dropped udpiphdr from mbuf * here. We need udphdr for IPsec processing so we do that * later. */ ctx.ip6 = mtod(m, struct ip6_hdr *); ctx.uh = (struct udphdr *)((char *)ctx.ip6 + off); while ((inp = inp_next(&inpi)) != NULL) { INP_RLOCK_ASSERT(inp); /* * XXXRW: Because we weren't holding either the inpcb * or the hash lock when we checked for a match * before, we should probably recheck now that the * inpcb lock is (supposed to be) held. */ /* * Handle socket delivery policy for any-source * and source-specific multicast. [RFC3678] */ if ((imo = inp->in6p_moptions) != NULL) { struct sockaddr_in6 mcaddr; int blocked; bzero(&mcaddr, sizeof(struct sockaddr_in6)); mcaddr.sin6_len = sizeof(struct sockaddr_in6); mcaddr.sin6_family = AF_INET6; mcaddr.sin6_addr = ctx.ip6->ip6_dst; blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif, (struct sockaddr *)&mcaddr, (struct sockaddr *)&fromsa[0]); if (blocked != MCAST_PASS) { if (blocked == MCAST_NOTGMEMBER) IP6STAT_INC(ip6s_notmember); if (blocked == MCAST_NOTSMEMBER || blocked == MCAST_MUTED) UDPSTAT_INC(udps_filtermcast); continue; } } if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) { if (proto == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, inp, ctx.ip6, inp, ctx.uh); else UDP_PROBE(receive, NULL, inp, ctx.ip6, inp, ctx.uh); if (udp6_append(inp, n, off, fromsa)) { INP_RUNLOCK(inp); break; } else appends++; } /* * Don't look for additional matches if this one does * not have either the SO_REUSEPORT or SO_REUSEADDR * socket options set. This heuristic avoids * searching through all pcbs in the common case of a * non-shared port. It assumes that an application * will never clear these options after setting them. */ if ((inp->inp_socket->so_options & (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) { INP_RUNLOCK(inp); break; } } m_freem(m); if (appends == 0) { /* * No matching pcb found; discard datagram. (No need * to send an ICMP Port Unreachable for a broadcast * or multicast datgram.) */ UDPSTAT_INC(udps_noport); UDPSTAT_INC(udps_noportmcast); } return (IPPROTO_DONE); } int udp6_input(struct mbuf **mp, int *offp, int proto) { struct mbuf *m = *mp; struct ip6_hdr *ip6; struct udphdr *uh; struct inpcb *inp; struct inpcbinfo *pcbinfo; struct udpcb *up; int off = *offp; int cscov_partial; int plen, ulen; struct sockaddr_in6 fromsa[2]; struct m_tag *fwd_tag; uint16_t uh_sum; uint8_t nxt; NET_EPOCH_ASSERT(); if (m->m_len < off + sizeof(struct udphdr)) { m = m_pullup(m, off + sizeof(struct udphdr)); if (m == NULL) { IP6STAT_INC(ip6s_exthdrtoolong); *mp = NULL; return (IPPROTO_DONE); } } ip6 = mtod(m, struct ip6_hdr *); uh = (struct udphdr *)((caddr_t)ip6 + off); UDPSTAT_INC(udps_ipackets); /* * Destination port of 0 is illegal, based on RFC768. */ if (uh->uh_dport == 0) goto badunlocked; plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); ulen = ntohs((u_short)uh->uh_ulen); nxt = proto; cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0; if (nxt == IPPROTO_UDPLITE) { /* Zero means checksum over the complete packet. */ if (ulen == 0) ulen = plen; if (ulen == plen) cscov_partial = 0; if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) { /* XXX: What is the right UDPLite MIB counter? */ goto badunlocked; } if (uh->uh_sum == 0) { /* XXX: What is the right UDPLite MIB counter? */ goto badunlocked; } } else { if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) { UDPSTAT_INC(udps_badlen); goto badunlocked; } if (uh->uh_sum == 0) { UDPSTAT_INC(udps_nosum); /* * dport 0 was rejected earlier so this is OK even if * zero_checksum_port is 0 (which is its default value). */ if (ntohs(uh->uh_dport) == V_zero_checksum_port) goto skip_checksum; else goto badunlocked; } } if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) && !cscov_partial) { if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) uh_sum = m->m_pkthdr.csum_data; else uh_sum = in6_cksum_pseudo(ip6, ulen, nxt, m->m_pkthdr.csum_data); uh_sum ^= 0xffff; } else uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen); if (uh_sum != 0) { UDPSTAT_INC(udps_badsum); goto badunlocked; } skip_checksum: /* * Construct sockaddr format source address. */ init_sin6(&fromsa[0], m, 0); fromsa[0].sin6_port = uh->uh_sport; init_sin6(&fromsa[1], m, 1); fromsa[1].sin6_port = uh->uh_dport; pcbinfo = udp_get_inpcbinfo(nxt); if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { *mp = NULL; return (udp6_multi_input(m, off, proto, fromsa)); } /* * Locate pcb for datagram. */ /* * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. */ if ((m->m_flags & M_IP6_NEXTHOP) && (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { struct sockaddr_in6 *next_hop6; next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1); /* * Transparently forwarded. Pretend to be the destination. * Already got one like this? */ inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); if (!inp) { /* * It's new. Try to find the ambushing socket. * Because we've rewritten the destination address, * any hardware-generated hash is ignored. */ inp = in6_pcblookup(pcbinfo, &ip6->ip6_src, uh->uh_sport, &next_hop6->sin6_addr, next_hop6->sin6_port ? htons(next_hop6->sin6_port) : uh->uh_dport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif); } /* Remove the tag from the packet. We don't need it anymore. */ m_tag_delete(m, fwd_tag); m->m_flags &= ~M_IP6_NEXTHOP; } else inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src, uh->uh_sport, &ip6->ip6_dst, uh->uh_dport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m); if (inp == NULL) { if (V_udp_log_in_vain) { char ip6bufs[INET6_ADDRSTRLEN]; char ip6bufd[INET6_ADDRSTRLEN]; log(LOG_INFO, "Connection attempt to UDP [%s]:%d from [%s]:%d\n", ip6_sprintf(ip6bufd, &ip6->ip6_dst), ntohs(uh->uh_dport), ip6_sprintf(ip6bufs, &ip6->ip6_src), ntohs(uh->uh_sport)); } if (nxt == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh); else UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh); UDPSTAT_INC(udps_noport); if (m->m_flags & M_MCAST) { printf("UDP6: M_MCAST is set in a unicast packet.\n"); UDPSTAT_INC(udps_noportmcast); goto badunlocked; } if (V_udp_blackhole && (V_udp_blackhole_local || !in6_localaddr(&ip6->ip6_src))) goto badunlocked; icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); *mp = NULL; return (IPPROTO_DONE); } INP_RLOCK_ASSERT(inp); up = intoudpcb(inp); if (cscov_partial) { if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) { INP_RUNLOCK(inp); m_freem(m); *mp = NULL; return (IPPROTO_DONE); } } if (nxt == IPPROTO_UDPLITE) UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh); else UDP_PROBE(receive, NULL, inp, ip6, inp, uh); if (udp6_append(inp, m, off, fromsa) == 0) INP_RUNLOCK(inp); *mp = NULL; return (IPPROTO_DONE); badunlocked: m_freem(m); *mp = NULL; return (IPPROTO_DONE); } static void udp6_common_ctlinput(int cmd, struct sockaddr_in6 *sin6, struct ip6ctlparam *ip6cp, struct inpcbinfo *pcbinfo) { struct udphdr uh; struct ip6_hdr *ip6; struct mbuf *m; + struct inpcb *inp; int off = 0; - const struct sockaddr_in6 *sa6_src = NULL; void *cmdarg; struct inpcb *(*notify)(struct inpcb *, int) = udp_notify; struct udp_portonly { u_int16_t uh_sport; u_int16_t uh_dport; } *uhp; - if ((unsigned)cmd >= PRC_NCMDS) + if (inet6ctlerrmap[cmd] == 0) return; - if (PRC_IS_REDIRECT(cmd)) - notify = in6_rtchange, ip6cp = NULL; - else if (cmd == PRC_HOSTDEAD) - ip6cp = NULL; - else if (inet6ctlerrmap[cmd] == 0) + + m = ip6cp->ip6c_m; + ip6 = ip6cp->ip6c_ip6; + off = ip6cp->ip6c_off; + cmdarg = ip6cp->ip6c_cmdarg; + + /* Check if we can safely examine src and dst ports. */ + if (m->m_pkthdr.len < off + sizeof(*uhp)) return; - /* if the parameter is from icmp6, decode it. */ - if (ip6cp != NULL) { - m = ip6cp->ip6c_m; - ip6 = ip6cp->ip6c_ip6; - off = ip6cp->ip6c_off; - cmdarg = ip6cp->ip6c_cmdarg; - sa6_src = ip6cp->ip6c_src; - } else { - m = NULL; - ip6 = NULL; - cmdarg = NULL; - sa6_src = &sa6_any; - } + bzero(&uh, sizeof(uh)); + m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); - if (ip6) { - /* - * XXX: We assume that when IPV6 is non NULL, - * M and OFF are valid. - */ + /* Check to see if its tunneled */ + inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, uh.uh_dport, + &ip6->ip6_src, uh.uh_sport, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, + m->m_pkthdr.rcvif, m); + if (inp != NULL) { + struct udpcb *up; + udp_tun_icmp_t *func; - /* Check if we can safely examine src and dst ports. */ - if (m->m_pkthdr.len < off + sizeof(*uhp)) - return; - - bzero(&uh, sizeof(uh)); - m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); - - if (!PRC_IS_REDIRECT(cmd)) { - /* Check to see if its tunneled */ - struct inpcb *inp; - inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst, - uh.uh_dport, &ip6->ip6_src, uh.uh_sport, - INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, - m->m_pkthdr.rcvif, m); - if (inp != NULL) { - struct udpcb *up; - - up = intoudpcb(inp); - if (up->u_icmp_func) { - /* Yes it is. */ - INP_RUNLOCK(inp); - (*up->u_icmp_func)(cmd, (struct sockaddr *)ip6cp->ip6c_src, - ip6cp, up->u_tun_ctx); - return; - } else { - /* Can't find it. */ - INP_RUNLOCK(inp); - } - } - } - in6_pcbnotify(pcbinfo, sin6, uh.uh_dport, ip6cp->ip6c_src, - uh.uh_sport, cmd, cmdarg, notify); - } else - in6_pcbnotify(pcbinfo, sin6, 0, sa6_src, 0, cmd, cmdarg, - notify); + up = intoudpcb(inp); + func = up->u_icmp_func; + INP_RUNLOCK(inp); + if (func != NULL) + func(cmd, (struct sockaddr *)ip6cp->ip6c_src, ip6cp, + up->u_tun_ctx); + } + in6_pcbnotify(pcbinfo, sin6, uh.uh_dport, ip6cp->ip6c_src, + uh.uh_sport, cmd, cmdarg, notify); } static void udp6_ctlinput(int cmd, struct sockaddr_in6 *sin6, struct ip6ctlparam *ctl) { return (udp6_common_ctlinput(cmd, sin6, ctl, &V_udbinfo)); } static void udplite6_ctlinput(int cmd, struct sockaddr_in6 *sin6, struct ip6ctlparam *ctl) { return (udp6_common_ctlinput(cmd, sin6, ctl, &V_ulitecbinfo)); } static int udp6_getcred(SYSCTL_HANDLER_ARGS) { struct xucred xuc; struct sockaddr_in6 addrs[2]; struct epoch_tracker et; struct inpcb *inp; int error; error = priv_check(req->td, PRIV_NETINET_GETCRED); if (error) return (error); if (req->newlen != sizeof(addrs)) return (EINVAL); if (req->oldlen != sizeof(struct xucred)) return (EINVAL); error = SYSCTL_IN(req, addrs, sizeof(addrs)); if (error) return (error); if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { return (error); } NET_EPOCH_ENTER(et); inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr, addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL); NET_EPOCH_EXIT(et); if (inp != NULL) { INP_RLOCK_ASSERT(inp); if (inp->inp_socket == NULL) error = ENOENT; if (error == 0) error = cr_canseesocket(req->td->td_ucred, inp->inp_socket); if (error == 0) cru2x(inp->inp_cred, &xuc); INP_RUNLOCK(inp); } else error = ENOENT; if (error == 0) error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); return (error); } SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); static int udp6_output(struct socket *so, int flags_arg, struct mbuf *m, struct sockaddr *addr6, struct mbuf *control, struct thread *td) { struct inpcb *inp; struct ip6_hdr *ip6; struct udphdr *udp6; struct in6_addr *laddr, *faddr, in6a; struct ip6_pktopts *optp, opt; struct sockaddr_in6 *sin6, tmp; struct epoch_tracker et; int cscov_partial, error, flags, hlen, scope_ambiguous; u_int32_t ulen, plen; uint16_t cscov; u_short fport; uint8_t nxt; /* addr6 has been validated in udp6_send(). */ sin6 = (struct sockaddr_in6 *)addr6; /* * In contrast to IPv4 we do not validate the max. packet length * here due to IPv6 Jumbograms (RFC2675). */ scope_ambiguous = 0; if (sin6) { /* Protect *addr6 from overwrites. */ tmp = *sin6; sin6 = &tmp; /* * Application should provide a proper zone ID or the use of * default zone IDs should be enabled. Unfortunately, some * applications do not behave as it should, so we need a * workaround. Even if an appropriate ID is not determined, * we'll see if we can determine the outgoing interface. If we * can, determine the zone ID based on the interface below. */ if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) scope_ambiguous = 1; if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) { if (control) m_freem(control); m_freem(m); return (error); } } inp = sotoinpcb(so); KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); /* * In the following cases we want a write lock on the inp for either * local operations or for possible route cache updates in the IPv6 * output path: * - on connected sockets (sin6 is NULL) for route cache updates, * - when we are not bound to an address and source port (it is * in6_pcbsetport() which will require the write lock). * * We check the inp fields before actually locking the inp, so * here exists a race, and we may WLOCK the inp and end with already * bound one by other thread. This is fine. */ if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && inp->inp_lport == 0)) INP_WLOCK(inp); else INP_RLOCK(inp); nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ? IPPROTO_UDP : IPPROTO_UDPLITE; #ifdef INET if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { int hasv4addr; if (sin6 == NULL) hasv4addr = (inp->inp_vflag & INP_IPV4); else hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ? 1 : 0; if (hasv4addr) { /* * XXXRW: We release UDP-layer locks before calling * udp_send() in order to avoid recursion. However, * this does mean there is a short window where inp's * fields are unstable. Could this lead to a * potential race in which the factors causing us to * select the UDPv4 output routine are invalidated? */ INP_UNLOCK(inp); if (sin6) in6_sin6_2_sin_in_sock((struct sockaddr *)sin6); /* addr will just be freed in sendit(). */ return (udp_send(so, flags_arg | PRUS_IPV6, m, (struct sockaddr *)sin6, control, td)); } } else #endif if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* * Given this is either an IPv6-only socket or no INET is * supported we will fail the send if the given destination * address is a v4mapped address. * * XXXGL: do we leak m and control? */ INP_UNLOCK(inp); return (EINVAL); } NET_EPOCH_ENTER(et); if (control) { if ((error = ip6_setpktopts(control, &opt, inp->in6p_outputopts, td->td_ucred, nxt)) != 0) { goto release; } optp = &opt; } else optp = inp->in6p_outputopts; if (sin6) { /* * Since we saw no essential reason for calling in_pcbconnect, * we get rid of such kind of logic, and call in6_selectsrc * and in6_pcbsetport in order to fill in the local address * and the local port. */ if (sin6->sin6_port == 0) { error = EADDRNOTAVAIL; goto release; } if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { /* how about ::ffff:0.0.0.0 case? */ error = EISCONN; goto release; } /* * Given we handle the v4mapped case in the INET block above * assert here that it must not happen anymore. */ KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr), ("%s: sin6(%p)->sin6_addr is v4mapped which we " "should have handled.", __func__, sin6)); /* This only requires read-locking. */ error = in6_selectsrc_socket(sin6, optp, inp, td->td_ucred, scope_ambiguous, &in6a, NULL); if (error) goto release; laddr = &in6a; if (inp->inp_lport == 0) { struct inpcbinfo *pcbinfo; INP_WLOCK_ASSERT(inp); pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); INP_HASH_WLOCK(pcbinfo); error = in6_pcbsetport(laddr, inp, td->td_ucred); INP_HASH_WUNLOCK(pcbinfo); if (error != 0) { /* Undo an address bind that may have occurred. */ inp->in6p_laddr = in6addr_any; goto release; } } faddr = &sin6->sin6_addr; fport = sin6->sin6_port; /* allow 0 port */ } else { if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { error = ENOTCONN; goto release; } laddr = &inp->in6p_laddr; faddr = &inp->in6p_faddr; fport = inp->inp_fport; } ulen = m->m_pkthdr.len; plen = sizeof(struct udphdr) + ulen; hlen = sizeof(struct ip6_hdr); /* * Calculate data length and get a mbuf * for UDP and IP6 headers. */ M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT); if (m == NULL) { error = ENOBUFS; goto release; } /* * Stuff checksum and output datagram. */ cscov = cscov_partial = 0; udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */ udp6->uh_dport = fport; if (nxt == IPPROTO_UDPLITE) { struct udpcb *up; up = intoudpcb(inp); cscov = up->u_txcslen; if (cscov >= plen) cscov = 0; udp6->uh_ulen = htons(cscov); /* * For UDP-Lite, checksum coverage length of zero means * the entire UDPLite packet is covered by the checksum. */ cscov_partial = (cscov == 0) ? 0 : 1; } else if (plen <= 0xffff) udp6->uh_ulen = htons((u_short)plen); else udp6->uh_ulen = 0; udp6->uh_sum = 0; ip6 = mtod(m, struct ip6_hdr *); ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK; ip6->ip6_vfc &= ~IPV6_VERSION_MASK; ip6->ip6_vfc |= IPV6_VERSION; ip6->ip6_plen = htons((u_short)plen); ip6->ip6_nxt = nxt; ip6->ip6_hlim = in6_selecthlim(inp, NULL); ip6->ip6_src = *laddr; ip6->ip6_dst = *faddr; #ifdef MAC mac_inpcb_create_mbuf(inp, m); #endif if (cscov_partial) { if ((udp6->uh_sum = in6_cksum_partial(m, nxt, sizeof(struct ip6_hdr), plen, cscov)) == 0) udp6->uh_sum = 0xffff; } else { udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0); m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); } flags = 0; #if defined(ROUTE_MPATH) || defined(RSS) if (CALC_FLOWID_OUTBOUND_SENDTO) { uint32_t hash_type, hash_val; uint8_t pr; pr = inp->inp_socket->so_proto->pr_protocol; hash_val = fib6_calc_packet_hash(laddr, faddr, inp->inp_lport, fport, pr, &hash_type); m->m_pkthdr.flowid = hash_val; M_HASHTYPE_SET(m, hash_type); } /* do not use inp flowid */ flags |= IP_NODEFAULTFLOWID; #endif UDPSTAT_INC(udps_opackets); if (nxt == IPPROTO_UDPLITE) UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6); else UDP_PROBE(send, NULL, inp, ip6, inp, udp6); error = ip6_output(m, optp, INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags, inp->in6p_moptions, NULL, inp); INP_UNLOCK(inp); NET_EPOCH_EXIT(et); if (control) { ip6_clearpktopts(&opt, -1); m_freem(control); } return (error); release: INP_UNLOCK(inp); NET_EPOCH_EXIT(et); if (control) { ip6_clearpktopts(&opt, -1); m_freem(control); } m_freem(m); return (error); } static void udp6_abort(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); INP_WLOCK(inp); #ifdef INET if (inp->inp_vflag & INP_IPV4) { INP_WUNLOCK(inp); udp_abort(so); return; } #endif if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { INP_HASH_WLOCK(pcbinfo); in6_pcbdisconnect(inp); inp->in6p_laddr = in6addr_any; INP_HASH_WUNLOCK(pcbinfo); soisdisconnected(so); } INP_WUNLOCK(inp); } static int udp6_attach(struct socket *so, int proto, struct thread *td) { struct inpcb *inp; struct inpcbinfo *pcbinfo; int error; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { error = soreserve(so, udp_sendspace, udp_recvspace); if (error) return (error); } error = in_pcballoc(so, pcbinfo); if (error) return (error); inp = (struct inpcb *)so->so_pcb; inp->in6p_cksum = -1; /* just to be sure */ /* * XXX: ugly!! * IPv4 TTL initialization is necessary for an IPv6 socket as well, * because the socket may be bound to an IPv6 wildcard address, * which may match an IPv4-mapped IPv6 address. */ inp->inp_ip_ttl = V_ip_defttl; error = udp_newudpcb(inp); if (error) { in_pcbdetach(inp); in_pcbfree(inp); return (error); } INP_WUNLOCK(inp); return (0); } static int udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) { struct inpcb *inp; struct inpcbinfo *pcbinfo; int error; u_char vflagsav; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); if (nam->sa_family != AF_INET6) return (EAFNOSUPPORT); if (nam->sa_len != sizeof(struct sockaddr_in6)) return (EINVAL); INP_WLOCK(inp); INP_HASH_WLOCK(pcbinfo); vflagsav = inp->inp_vflag; inp->inp_vflag &= ~INP_IPV4; inp->inp_vflag |= INP_IPV6; if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { struct sockaddr_in6 *sin6_p; sin6_p = (struct sockaddr_in6 *)nam; if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) inp->inp_vflag |= INP_IPV4; #ifdef INET else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { struct sockaddr_in sin; in6_sin6_2_sin(&sin, sin6_p); inp->inp_vflag |= INP_IPV4; inp->inp_vflag &= ~INP_IPV6; error = in_pcbbind(inp, (struct sockaddr *)&sin, td->td_ucred); goto out; } #endif } error = in6_pcbbind(inp, nam, td->td_ucred); #ifdef INET out: #endif if (error != 0) inp->inp_vflag = vflagsav; INP_HASH_WUNLOCK(pcbinfo); INP_WUNLOCK(inp); return (error); } static void udp6_close(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_close: inp == NULL")); INP_WLOCK(inp); #ifdef INET if (inp->inp_vflag & INP_IPV4) { INP_WUNLOCK(inp); (void)udp_disconnect(so); return; } #endif if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { INP_HASH_WLOCK(pcbinfo); in6_pcbdisconnect(inp); inp->in6p_laddr = in6addr_any; INP_HASH_WUNLOCK(pcbinfo); soisdisconnected(so); } INP_WUNLOCK(inp); } static int udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) { #ifdef INET struct epoch_tracker et; #endif struct inpcb *inp; struct inpcbinfo *pcbinfo; struct sockaddr_in6 *sin6; int error; u_char vflagsav; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); sin6 = (struct sockaddr_in6 *)nam; if (sin6->sin6_family != AF_INET6) return (EAFNOSUPPORT); if (sin6->sin6_len != sizeof(*sin6)) return (EINVAL); /* * XXXRW: Need to clarify locking of v4/v6 flags. */ INP_WLOCK(inp); #ifdef INET if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { struct sockaddr_in sin; if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { error = EINVAL; goto out; } if ((inp->inp_vflag & INP_IPV4) == 0) { error = EAFNOSUPPORT; goto out; } if (inp->inp_faddr.s_addr != INADDR_ANY) { error = EISCONN; goto out; } in6_sin6_2_sin(&sin, sin6); error = prison_remote_ip4(td->td_ucred, &sin.sin_addr); if (error != 0) goto out; vflagsav = inp->inp_vflag; inp->inp_vflag |= INP_IPV4; inp->inp_vflag &= ~INP_IPV6; NET_EPOCH_ENTER(et); INP_HASH_WLOCK(pcbinfo); error = in_pcbconnect(inp, (struct sockaddr *)&sin, td->td_ucred, true); INP_HASH_WUNLOCK(pcbinfo); NET_EPOCH_EXIT(et); /* * If connect succeeds, mark socket as connected. If * connect fails and socket is unbound, reset inp_vflag * field. */ if (error == 0) soisconnected(so); else if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) inp->inp_vflag = vflagsav; goto out; } else { if ((inp->inp_vflag & INP_IPV6) == 0) { error = EAFNOSUPPORT; goto out; } } #endif if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { error = EISCONN; goto out; } error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr); if (error != 0) goto out; vflagsav = inp->inp_vflag; inp->inp_vflag &= ~INP_IPV4; inp->inp_vflag |= INP_IPV6; INP_HASH_WLOCK(pcbinfo); error = in6_pcbconnect(inp, nam, td->td_ucred); INP_HASH_WUNLOCK(pcbinfo); /* * If connect succeeds, mark socket as connected. If * connect fails and socket is unbound, reset inp_vflag * field. */ if (error == 0) soisconnected(so); else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && inp->inp_lport == 0) inp->inp_vflag = vflagsav; out: INP_WUNLOCK(inp); return (error); } static void udp6_detach(struct socket *so) { struct inpcb *inp; struct udpcb *up; inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); INP_WLOCK(inp); up = intoudpcb(inp); KASSERT(up != NULL, ("%s: up == NULL", __func__)); in_pcbdetach(inp); in_pcbfree(inp); udp_discardcb(up); } static int udp6_disconnect(struct socket *so) { struct inpcb *inp; struct inpcbinfo *pcbinfo; pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol); inp = sotoinpcb(so); KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); INP_WLOCK(inp); #ifdef INET if (inp->inp_vflag & INP_IPV4) { INP_WUNLOCK(inp); (void)udp_disconnect(so); return (0); } #endif if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { INP_WUNLOCK(inp); return (ENOTCONN); } INP_HASH_WLOCK(pcbinfo); in6_pcbdisconnect(inp); inp->in6p_laddr = in6addr_any; INP_HASH_WUNLOCK(pcbinfo); SOCK_LOCK(so); so->so_state &= ~SS_ISCONNECTED; /* XXX */ SOCK_UNLOCK(so); INP_WUNLOCK(inp); return (0); } static int udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *td) { int error; if (addr) { if (addr->sa_len != sizeof(struct sockaddr_in6)) { error = EINVAL; goto bad; } if (addr->sa_family != AF_INET6) { error = EAFNOSUPPORT; goto bad; } } return (udp6_output(so, flags, m, addr, control, td)); bad: if (control) m_freem(control); m_freem(m); return (error); } #define UDP6_PROTOSW \ .pr_type = SOCK_DGRAM, \ .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, \ .pr_ctloutput = ip6_ctloutput, \ .pr_abort = udp6_abort, \ .pr_attach = udp6_attach, \ .pr_bind = udp6_bind, \ .pr_connect = udp6_connect, \ .pr_control = in6_control, \ .pr_detach = udp6_detach, \ .pr_disconnect = udp6_disconnect, \ .pr_peeraddr = in6_mapped_peeraddr, \ .pr_send = udp6_send, \ .pr_shutdown = udp_shutdown, \ .pr_sockaddr = in6_mapped_sockaddr, \ .pr_soreceive = soreceive_dgram, \ .pr_sosend = sosend_dgram, \ .pr_sosetlabel = in_pcbsosetlabel, \ .pr_close = udp6_close struct protosw udp6_protosw = { .pr_protocol = IPPROTO_UDP, UDP6_PROTOSW }; struct protosw udplite6_protosw = { .pr_protocol = IPPROTO_UDPLITE, UDP6_PROTOSW }; static void udp6_init(void *arg __unused) { IP6PROTO_REGISTER(IPPROTO_UDP, udp6_input, udp6_ctlinput); IP6PROTO_REGISTER(IPPROTO_UDPLITE, udp6_input, udplite6_ctlinput); } SYSINIT(udp6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp6_init, NULL);