diff --git a/sys/netinet6/frag6.c b/sys/netinet6/frag6.c index e0857d3af3e8..9f12d4d691b6 100644 --- a/sys/netinet6/frag6.c +++ b/sys/netinet6/frag6.c @@ -1,1053 +1,1067 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * Copyright (c) 2019 Netflix, 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: frag6.c,v 1.33 2002/01/07 11:34:48 kjc Exp $ */ #include __FBSDID("$FreeBSD$"); #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 /* For ECN definitions. */ #include /* For ECN definitions. */ #ifdef MAC #include #endif /* * A "big picture" of how IPv6 fragment queues are all linked together. * * struct ip6qbucket ip6qb[...]; hashed buckets * |||||||| * | * +--- TAILQ(struct ip6q, packets) *q6; tailq entries holding * |||||||| fragmented packets * | (1 per original packet) * | * +--- TAILQ(struct ip6asfrag, ip6q_frags) *af6; tailq entries of IPv6 * | *ip6af;fragment packets * | for one original packet * + *mbuf */ /* Reassembly headers are stored in hash buckets. */ #define IP6REASS_NHASH_LOG2 10 #define IP6REASS_NHASH (1 << IP6REASS_NHASH_LOG2) #define IP6REASS_HMASK (IP6REASS_NHASH - 1) TAILQ_HEAD(ip6qhead, ip6q); struct ip6qbucket { struct ip6qhead packets; struct mtx lock; int count; }; struct ip6asfrag { TAILQ_ENTRY(ip6asfrag) ip6af_tq; struct mbuf *ip6af_m; int ip6af_offset; /* Offset in ip6af_m to next header. */ int ip6af_frglen; /* Fragmentable part length. */ int ip6af_off; /* Fragment offset. */ bool ip6af_mff; /* More fragment bit in frag off. */ }; static MALLOC_DEFINE(M_FRAG6, "frag6", "IPv6 fragment reassembly header"); #ifdef VIMAGE /* A flag to indicate if IPv6 fragmentation is initialized. */ VNET_DEFINE_STATIC(bool, frag6_on); #define V_frag6_on VNET(frag6_on) #endif /* System wide (global) maximum and count of packets in reassembly queues. */ static int ip6_maxfrags; static u_int __exclusive_cache_line frag6_nfrags; /* Maximum and current packets in per-VNET reassembly queue. */ VNET_DEFINE_STATIC(int, ip6_maxfragpackets); VNET_DEFINE_STATIC(volatile u_int, frag6_nfragpackets); #define V_ip6_maxfragpackets VNET(ip6_maxfragpackets) #define V_frag6_nfragpackets VNET(frag6_nfragpackets) /* Maximum per-VNET reassembly queues per bucket and fragments per packet. */ VNET_DEFINE_STATIC(int, ip6_maxfragbucketsize); VNET_DEFINE_STATIC(int, ip6_maxfragsperpacket); #define V_ip6_maxfragbucketsize VNET(ip6_maxfragbucketsize) #define V_ip6_maxfragsperpacket VNET(ip6_maxfragsperpacket) /* Per-VNET reassembly queue buckets. */ VNET_DEFINE_STATIC(struct ip6qbucket, ip6qb[IP6REASS_NHASH]); VNET_DEFINE_STATIC(uint32_t, ip6qb_hashseed); #define V_ip6qb VNET(ip6qb) #define V_ip6qb_hashseed VNET(ip6qb_hashseed) #define IP6QB_LOCK(_b) mtx_lock(&V_ip6qb[(_b)].lock) #define IP6QB_TRYLOCK(_b) mtx_trylock(&V_ip6qb[(_b)].lock) #define IP6QB_LOCK_ASSERT(_b) mtx_assert(&V_ip6qb[(_b)].lock, MA_OWNED) #define IP6QB_UNLOCK(_b) mtx_unlock(&V_ip6qb[(_b)].lock) #define IP6QB_HEAD(_b) (&V_ip6qb[(_b)].packets) /* * By default, limit the number of IP6 fragments across all reassembly * queues to 1/32 of the total number of mbuf clusters. * * Limit the total number of reassembly queues per VNET to the * IP6 fragment limit, but ensure the limit will not allow any bucket * to grow above 100 items. (The bucket limit is * IP_MAXFRAGPACKETS / (IPREASS_NHASH / 2), so the 50 is the correct * multiplier to reach a 100-item limit.) * The 100-item limit was chosen as brief testing seems to show that * this produces "reasonable" performance on some subset of systems * under DoS attack. */ #define IP6_MAXFRAGS (nmbclusters / 32) #define IP6_MAXFRAGPACKETS (imin(IP6_MAXFRAGS, IP6REASS_NHASH * 50)) /* * Sysctls and helper function. */ SYSCTL_DECL(_net_inet6_ip6); SYSCTL_UINT(_net_inet6_ip6, OID_AUTO, frag6_nfrags, CTLFLAG_RD, &frag6_nfrags, 0, "Global number of IPv6 fragments across all reassembly queues."); static void frag6_set_bucketsize(void) { int i; if ((i = V_ip6_maxfragpackets) > 0) V_ip6_maxfragbucketsize = imax(i / (IP6REASS_NHASH / 2), 1); } SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW, &ip6_maxfrags, 0, "Maximum allowed number of outstanding IPv6 packet fragments. " "A value of 0 means no fragmented packets will be accepted, while " "a value of -1 means no limit"); static int sysctl_ip6_maxfragpackets(SYSCTL_HANDLER_ARGS) { int error, val; val = V_ip6_maxfragpackets; error = sysctl_handle_int(oidp, &val, 0, req); if (error != 0 || !req->newptr) return (error); V_ip6_maxfragpackets = val; frag6_set_bucketsize(); return (0); } SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_ip6_maxfragpackets, "I", "Default maximum number of outstanding fragmented IPv6 packets. " "A value of 0 means no fragmented packets will be accepted, while a " "a value of -1 means no limit"); SYSCTL_UINT(_net_inet6_ip6, OID_AUTO, frag6_nfragpackets, CTLFLAG_VNET | CTLFLAG_RD, __DEVOLATILE(u_int *, &VNET_NAME(frag6_nfragpackets)), 0, "Per-VNET number of IPv6 fragments across all reassembly queues."); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGSPERPACKET, maxfragsperpacket, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragsperpacket), 0, "Maximum allowed number of fragments per packet"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGBUCKETSIZE, maxfragbucketsize, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragbucketsize), 0, "Maximum number of reassembly queues per hash bucket"); /* * Remove the IPv6 fragmentation header from the mbuf. */ int ip6_deletefraghdr(struct mbuf *m, int offset, int wait __unused) { struct ip6_hdr *ip6; KASSERT(m->m_len >= offset + sizeof(struct ip6_frag), ("%s: ext headers not contigous in mbuf %p m_len %d >= " "offset %d + %zu\n", __func__, m, m->m_len, offset, sizeof(struct ip6_frag))); /* Delete frag6 header. */ ip6 = mtod(m, struct ip6_hdr *); bcopy(ip6, (char *)ip6 + sizeof(struct ip6_frag), offset); m->m_data += sizeof(struct ip6_frag); m->m_len -= sizeof(struct ip6_frag); m->m_flags |= M_FRAGMENTED; return (0); } /* * Free a fragment reassembly header and all associated datagrams. */ static void frag6_freef(struct ip6q *q6, uint32_t bucket) { struct ip6_hdr *ip6; struct ip6asfrag *af6; struct mbuf *m; IP6QB_LOCK_ASSERT(bucket); while ((af6 = TAILQ_FIRST(&q6->ip6q_frags)) != NULL) { m = af6->ip6af_m; TAILQ_REMOVE(&q6->ip6q_frags, af6, ip6af_tq); /* * Return ICMP time exceeded error for the 1st fragment. * Just free other fragments. */ if (af6->ip6af_off == 0 && m->m_pkthdr.rcvif != NULL) { /* Adjust pointer. */ ip6 = mtod(m, struct ip6_hdr *); /* Restore source and destination addresses. */ ip6->ip6_src = q6->ip6q_src; ip6->ip6_dst = q6->ip6q_dst; icmp6_error(m, ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY, 0); } else m_freem(m); free(af6, M_FRAG6); } TAILQ_REMOVE(IP6QB_HEAD(bucket), q6, ip6q_tq); V_ip6qb[bucket].count--; atomic_subtract_int(&frag6_nfrags, q6->ip6q_nfrag); #ifdef MAC mac_ip6q_destroy(q6); #endif free(q6, M_FRAG6); atomic_subtract_int(&V_frag6_nfragpackets, 1); } /* * Drain off all datagram fragments belonging to * the given network interface. */ static void frag6_cleanup(void *arg __unused, struct ifnet *ifp) { struct ip6qhead *head; struct ip6q *q6; struct ip6asfrag *af6; uint32_t bucket; KASSERT(ifp != NULL, ("%s: ifp is NULL", __func__)); CURVNET_SET_QUIET(ifp->if_vnet); #ifdef VIMAGE /* * Skip processing if IPv6 reassembly is not initialised or * torn down by frag6_destroy(). */ if (!V_frag6_on) { CURVNET_RESTORE(); return; } #endif for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { IP6QB_LOCK(bucket); head = IP6QB_HEAD(bucket); /* Scan fragment list. */ TAILQ_FOREACH(q6, head, ip6q_tq) { TAILQ_FOREACH(af6, &q6->ip6q_frags, ip6af_tq) { /* Clear no longer valid rcvif pointer. */ if (af6->ip6af_m->m_pkthdr.rcvif == ifp) af6->ip6af_m->m_pkthdr.rcvif = NULL; } } IP6QB_UNLOCK(bucket); } CURVNET_RESTORE(); } EVENTHANDLER_DEFINE(ifnet_departure_event, frag6_cleanup, NULL, 0); /* * Like in RFC2460, in RFC8200, fragment and reassembly rules do not agree with * each other, in terms of next header field handling in fragment header. * While the sender will use the same value for all of the fragmented packets, * receiver is suggested not to check for consistency. * * Fragment rules (p18,p19): * (2) A Fragment header containing: * The Next Header value that identifies the first header * after the Per-Fragment headers of the original packet. * -> next header field is same for all fragments * * Reassembly rule (p20): * The Next Header field of the last header of the Per-Fragment * headers is obtained from the Next Header field of the first * fragment's Fragment header. * -> should grab it from the first fragment only * * The following note also contradicts with fragment rule - no one is going to * send different fragment with different next header field. * * Additional note (p22) [not an error]: * The Next Header values in the Fragment headers of different * fragments of the same original packet may differ. Only the value * from the Offset zero fragment packet is used for reassembly. * -> should grab it from the first fragment only * * There is no explicit reason given in the RFC. Historical reason maybe? */ /* * Fragment input. */ int frag6_input(struct mbuf **mp, int *offp, int proto) { struct mbuf *m, *t; struct ip6_hdr *ip6; struct ip6_frag *ip6f; struct ip6qhead *head; struct ip6q *q6; struct ip6asfrag *af6, *ip6af, *af6tmp; struct in6_ifaddr *ia6; struct ifnet *dstifp, *srcifp; uint32_t hashkey[(sizeof(struct in6_addr) * 2 + sizeof(ip6f->ip6f_ident)) / sizeof(uint32_t)]; uint32_t bucket, *hashkeyp; int fragoff, frgpartlen; /* Must be larger than uint16_t. */ int nxt, offset, plen; uint8_t ecn, ecn0; bool only_frag; #ifdef RSS struct ip6_direct_ctx *ip6dc; struct m_tag *mtag; #endif m = *mp; offset = *offp; M_ASSERTPKTHDR(m); if (m->m_len < offset + sizeof(struct ip6_frag)) { m = m_pullup(m, offset + sizeof(struct ip6_frag)); if (m == NULL) { IP6STAT_INC(ip6s_exthdrtoolong); *mp = NULL; return (IPPROTO_DONE); } } ip6 = mtod(m, struct ip6_hdr *); dstifp = NULL; /* Find the destination interface of the packet. */ ia6 = in6ifa_ifwithaddr(&ip6->ip6_dst, 0 /* XXX */, false); if (ia6 != NULL) dstifp = ia6->ia_ifp; /* Jumbo payload cannot contain a fragment header. */ if (ip6->ip6_plen == 0) { icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, offset); in6_ifstat_inc(dstifp, ifs6_reass_fail); *mp = NULL; return (IPPROTO_DONE); } /* * Check whether fragment packet's fragment length is a * multiple of 8 octets (unless it is the last one). * sizeof(struct ip6_frag) == 8 * sizeof(struct ip6_hdr) = 40 */ ip6f = (struct ip6_frag *)((caddr_t)ip6 + offset); if ((ip6f->ip6f_offlg & IP6F_MORE_FRAG) && (((ntohs(ip6->ip6_plen) - offset) & 0x7) != 0)) { icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, offsetof(struct ip6_hdr, ip6_plen)); in6_ifstat_inc(dstifp, ifs6_reass_fail); *mp = NULL; return (IPPROTO_DONE); } IP6STAT_INC(ip6s_fragments); in6_ifstat_inc(dstifp, ifs6_reass_reqd); /* * Handle "atomic" fragments (offset and m bit set to 0) upfront, * unrelated to any reassembly. We need to remove the frag hdr * which is ugly. * See RFC 6946 and section 4.5 of RFC 8200. */ if ((ip6f->ip6f_offlg & ~IP6F_RESERVED_MASK) == 0) { IP6STAT_INC(ip6s_atomicfrags); nxt = ip6f->ip6f_nxt; /* * Set nxt(-hdr field value) to the original value. * We cannot just set ip6->ip6_nxt as there might be * an unfragmentable part with extension headers and * we must update the last one. */ m_copyback(m, ip6_get_prevhdr(m, offset), sizeof(uint8_t), (caddr_t)&nxt); ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct ip6_frag)); if (ip6_deletefraghdr(m, offset, M_NOWAIT) != 0) goto dropfrag2; m->m_pkthdr.len -= sizeof(struct ip6_frag); in6_ifstat_inc(dstifp, ifs6_reass_ok); *mp = m; return (nxt); } /* Offset now points to data portion. */ offset += sizeof(struct ip6_frag); /* Get fragment length and discard 0-byte fragments. */ frgpartlen = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - offset; if (frgpartlen == 0) { icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, offsetof(struct ip6_hdr, ip6_plen)); in6_ifstat_inc(dstifp, ifs6_reass_fail); IP6STAT_INC(ip6s_fragdropped); *mp = NULL; return (IPPROTO_DONE); } /* * Enforce upper bound on number of fragments for the entire system. * If maxfrag is 0, never accept fragments. * If maxfrag is -1, accept all fragments without limitation. */ if (ip6_maxfrags < 0) ; else if (atomic_load_int(&frag6_nfrags) >= (u_int)ip6_maxfrags) goto dropfrag2; /* * Validate that a full header chain to the ULP is present in the * packet containing the first fragment as per RFC RFC7112 and * RFC 8200 pages 18,19: * The first fragment packet is composed of: * (3) Extension headers, if any, and the Upper-Layer header. These * headers must be in the first fragment. ... */ fragoff = ntohs(ip6f->ip6f_offlg & IP6F_OFF_MASK); /* XXX TODO. thj has D16851 open for this. */ /* Send ICMPv6 4,3 in case of violation. */ /* Store receive network interface pointer for later. */ srcifp = m->m_pkthdr.rcvif; /* Generate a hash value for fragment bucket selection. */ hashkeyp = hashkey; memcpy(hashkeyp, &ip6->ip6_src, sizeof(struct in6_addr)); hashkeyp += sizeof(struct in6_addr) / sizeof(*hashkeyp); memcpy(hashkeyp, &ip6->ip6_dst, sizeof(struct in6_addr)); hashkeyp += sizeof(struct in6_addr) / sizeof(*hashkeyp); *hashkeyp = ip6f->ip6f_ident; bucket = jenkins_hash32(hashkey, nitems(hashkey), V_ip6qb_hashseed); bucket &= IP6REASS_HMASK; IP6QB_LOCK(bucket); head = IP6QB_HEAD(bucket); TAILQ_FOREACH(q6, head, ip6q_tq) if (ip6f->ip6f_ident == q6->ip6q_ident && IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &q6->ip6q_src) && IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &q6->ip6q_dst) #ifdef MAC && mac_ip6q_match(m, q6) #endif ) break; only_frag = false; if (q6 == NULL) { /* A first fragment to arrive creates a reassembly queue. */ only_frag = true; /* * Enforce upper bound on number of fragmented packets * for which we attempt reassembly; * If maxfragpackets is 0, never accept fragments. * If maxfragpackets is -1, accept all fragments without * limitation. */ if (V_ip6_maxfragpackets < 0) ; else if (V_ip6qb[bucket].count >= V_ip6_maxfragbucketsize || atomic_load_int(&V_frag6_nfragpackets) >= (u_int)V_ip6_maxfragpackets) goto dropfrag; /* Allocate IPv6 fragement packet queue entry. */ q6 = (struct ip6q *)malloc(sizeof(struct ip6q), M_FRAG6, M_NOWAIT | M_ZERO); if (q6 == NULL) goto dropfrag; #ifdef MAC if (mac_ip6q_init(q6, M_NOWAIT) != 0) { free(q6, M_FRAG6); goto dropfrag; } mac_ip6q_create(m, q6); #endif atomic_add_int(&V_frag6_nfragpackets, 1); /* ip6q_nxt will be filled afterwards, from 1st fragment. */ TAILQ_INIT(&q6->ip6q_frags); q6->ip6q_ident = ip6f->ip6f_ident; q6->ip6q_ttl = IPV6_FRAGTTL; q6->ip6q_src = ip6->ip6_src; q6->ip6q_dst = ip6->ip6_dst; q6->ip6q_ecn = IPV6_ECN(ip6); q6->ip6q_unfrglen = -1; /* The 1st fragment has not arrived. */ /* Add the fragemented packet to the bucket. */ TAILQ_INSERT_HEAD(head, q6, ip6q_tq); V_ip6qb[bucket].count++; } /* * If it is the 1st fragment, record the length of the * unfragmentable part and the next header of the fragment header. * Assume the first 1st fragement to arrive will be correct. * We do not have any duplicate checks here yet so another packet * with fragoff == 0 could come and overwrite the ip6q_unfrglen * and worse, the next header, at any time. */ if (fragoff == 0 && q6->ip6q_unfrglen == -1) { q6->ip6q_unfrglen = offset - sizeof(struct ip6_hdr) - sizeof(struct ip6_frag); q6->ip6q_nxt = ip6f->ip6f_nxt; /* XXX ECN? */ } /* * Check that the reassembled packet would not exceed 65535 bytes * in size. * If it would exceed, discard the fragment and return an ICMP error. */ if (q6->ip6q_unfrglen >= 0) { /* The 1st fragment has already arrived. */ if (q6->ip6q_unfrglen + fragoff + frgpartlen > IPV6_MAXPACKET) { if (only_frag) { TAILQ_REMOVE(head, q6, ip6q_tq); V_ip6qb[bucket].count--; atomic_subtract_int(&V_frag6_nfragpackets, 1); #ifdef MAC mac_ip6q_destroy(q6); #endif free(q6, M_FRAG6); } IP6QB_UNLOCK(bucket); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, offset - sizeof(struct ip6_frag) + offsetof(struct ip6_frag, ip6f_offlg)); *mp = NULL; return (IPPROTO_DONE); } } else if (fragoff + frgpartlen > IPV6_MAXPACKET) { if (only_frag) { TAILQ_REMOVE(head, q6, ip6q_tq); V_ip6qb[bucket].count--; atomic_subtract_int(&V_frag6_nfragpackets, 1); #ifdef MAC mac_ip6q_destroy(q6); #endif free(q6, M_FRAG6); } IP6QB_UNLOCK(bucket); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, offset - sizeof(struct ip6_frag) + offsetof(struct ip6_frag, ip6f_offlg)); *mp = NULL; return (IPPROTO_DONE); } /* * If it is the first fragment, do the above check for each * fragment already stored in the reassembly queue. */ if (fragoff == 0 && !only_frag) { TAILQ_FOREACH_SAFE(af6, &q6->ip6q_frags, ip6af_tq, af6tmp) { if (q6->ip6q_unfrglen + af6->ip6af_off + af6->ip6af_frglen > IPV6_MAXPACKET) { struct ip6_hdr *ip6err; struct mbuf *merr; int erroff; merr = af6->ip6af_m; erroff = af6->ip6af_offset; /* Dequeue the fragment. */ TAILQ_REMOVE(&q6->ip6q_frags, af6, ip6af_tq); q6->ip6q_nfrag--; atomic_subtract_int(&frag6_nfrags, 1); free(af6, M_FRAG6); /* Set a valid receive interface pointer. */ merr->m_pkthdr.rcvif = srcifp; /* Adjust pointer. */ ip6err = mtod(merr, struct ip6_hdr *); /* * Restore source and destination addresses * in the erroneous IPv6 header. */ ip6err->ip6_src = q6->ip6q_src; ip6err->ip6_dst = q6->ip6q_dst; icmp6_error(merr, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, erroff - sizeof(struct ip6_frag) + offsetof(struct ip6_frag, ip6f_offlg)); } } } /* Allocate an IPv6 fragement queue entry for this fragmented part. */ ip6af = (struct ip6asfrag *)malloc(sizeof(struct ip6asfrag), M_FRAG6, M_NOWAIT | M_ZERO); if (ip6af == NULL) goto dropfrag; ip6af->ip6af_mff = (ip6f->ip6f_offlg & IP6F_MORE_FRAG) ? true : false; ip6af->ip6af_off = fragoff; ip6af->ip6af_frglen = frgpartlen; ip6af->ip6af_offset = offset; ip6af->ip6af_m = m; if (only_frag) { /* * Do a manual insert rather than a hard-to-understand cast * to a different type relying on data structure order to work. */ TAILQ_INSERT_HEAD(&q6->ip6q_frags, ip6af, ip6af_tq); goto postinsert; } /* Do duplicate, condition, and boundry checks. */ /* * Handle ECN by comparing this segment with the first one; * if CE is set, do not lose CE. * Drop if CE and not-ECT are mixed for the same packet. */ ecn = IPV6_ECN(ip6); ecn0 = q6->ip6q_ecn; if (ecn == IPTOS_ECN_CE) { if (ecn0 == IPTOS_ECN_NOTECT) { free(ip6af, M_FRAG6); goto dropfrag; } if (ecn0 != IPTOS_ECN_CE) q6->ip6q_ecn = IPTOS_ECN_CE; } if (ecn == IPTOS_ECN_NOTECT && ecn0 != IPTOS_ECN_NOTECT) { free(ip6af, M_FRAG6); goto dropfrag; } /* Find a fragmented part which begins after this one does. */ TAILQ_FOREACH(af6, &q6->ip6q_frags, ip6af_tq) if (af6->ip6af_off > ip6af->ip6af_off) break; /* * If the incoming framgent overlaps some existing fragments in * the reassembly queue, drop both the new fragment and the * entire reassembly queue. However, if the new fragment * is an exact duplicate of an existing fragment, only silently * drop the existing fragment and leave the fragmentation queue * unchanged, as allowed by the RFC. (RFC 8200, 4.5) */ if (af6 != NULL) af6tmp = TAILQ_PREV(af6, ip6fraghead, ip6af_tq); else af6tmp = TAILQ_LAST(&q6->ip6q_frags, ip6fraghead); if (af6tmp != NULL) { if (af6tmp->ip6af_off + af6tmp->ip6af_frglen - ip6af->ip6af_off > 0) { if (af6tmp->ip6af_off != ip6af->ip6af_off || af6tmp->ip6af_frglen != ip6af->ip6af_frglen) frag6_freef(q6, bucket); free(ip6af, M_FRAG6); goto dropfrag; } } if (af6 != NULL) { if (ip6af->ip6af_off + ip6af->ip6af_frglen - af6->ip6af_off > 0) { if (af6->ip6af_off != ip6af->ip6af_off || af6->ip6af_frglen != ip6af->ip6af_frglen) frag6_freef(q6, bucket); free(ip6af, M_FRAG6); goto dropfrag; } } #ifdef MAC mac_ip6q_update(m, q6); #endif /* * Stick new segment in its place; check for complete reassembly. * If not complete, check fragment limit. Move to front of packet * queue, as we are the most recently active fragmented packet. */ if (af6 != NULL) TAILQ_INSERT_BEFORE(af6, ip6af, ip6af_tq); else TAILQ_INSERT_TAIL(&q6->ip6q_frags, ip6af, ip6af_tq); postinsert: atomic_add_int(&frag6_nfrags, 1); q6->ip6q_nfrag++; plen = 0; TAILQ_FOREACH(af6, &q6->ip6q_frags, ip6af_tq) { if (af6->ip6af_off != plen) { if (q6->ip6q_nfrag > V_ip6_maxfragsperpacket) { IP6STAT_ADD(ip6s_fragdropped, q6->ip6q_nfrag); frag6_freef(q6, bucket); } IP6QB_UNLOCK(bucket); *mp = NULL; return (IPPROTO_DONE); } plen += af6->ip6af_frglen; } af6 = TAILQ_LAST(&q6->ip6q_frags, ip6fraghead); if (af6->ip6af_mff) { if (q6->ip6q_nfrag > V_ip6_maxfragsperpacket) { IP6STAT_ADD(ip6s_fragdropped, q6->ip6q_nfrag); frag6_freef(q6, bucket); } IP6QB_UNLOCK(bucket); *mp = NULL; return (IPPROTO_DONE); } /* Reassembly is complete; concatenate fragments. */ ip6af = TAILQ_FIRST(&q6->ip6q_frags); t = m = ip6af->ip6af_m; TAILQ_REMOVE(&q6->ip6q_frags, ip6af, ip6af_tq); while ((af6 = TAILQ_FIRST(&q6->ip6q_frags)) != NULL) { m->m_pkthdr.csum_flags &= af6->ip6af_m->m_pkthdr.csum_flags; m->m_pkthdr.csum_data += af6->ip6af_m->m_pkthdr.csum_data; TAILQ_REMOVE(&q6->ip6q_frags, af6, ip6af_tq); t = m_last(t); m_adj(af6->ip6af_m, af6->ip6af_offset); m_demote_pkthdr(af6->ip6af_m); m_cat(t, af6->ip6af_m); free(af6, M_FRAG6); } while (m->m_pkthdr.csum_data & 0xffff0000) m->m_pkthdr.csum_data = (m->m_pkthdr.csum_data & 0xffff) + (m->m_pkthdr.csum_data >> 16); /* Adjust offset to point where the original next header starts. */ offset = ip6af->ip6af_offset - sizeof(struct ip6_frag); free(ip6af, M_FRAG6); ip6 = mtod(m, struct ip6_hdr *); ip6->ip6_plen = htons((u_short)plen + offset - sizeof(struct ip6_hdr)); if (q6->ip6q_ecn == IPTOS_ECN_CE) ip6->ip6_flow |= htonl(IPTOS_ECN_CE << 20); nxt = q6->ip6q_nxt; TAILQ_REMOVE(head, q6, ip6q_tq); V_ip6qb[bucket].count--; atomic_subtract_int(&frag6_nfrags, q6->ip6q_nfrag); ip6_deletefraghdr(m, offset, M_NOWAIT); /* Set nxt(-hdr field value) to the original value. */ m_copyback(m, ip6_get_prevhdr(m, offset), sizeof(uint8_t), (caddr_t)&nxt); #ifdef MAC mac_ip6q_reassemble(q6, m); mac_ip6q_destroy(q6); #endif free(q6, M_FRAG6); atomic_subtract_int(&V_frag6_nfragpackets, 1); if (m->m_flags & M_PKTHDR) { /* Isn't it always true? */ plen = 0; for (t = m; t; t = t->m_next) plen += t->m_len; m->m_pkthdr.len = plen; /* Set a valid receive interface pointer. */ m->m_pkthdr.rcvif = srcifp; } #ifdef RSS mtag = m_tag_alloc(MTAG_ABI_IPV6, IPV6_TAG_DIRECT, sizeof(*ip6dc), M_NOWAIT); if (mtag == NULL) goto dropfrag; ip6dc = (struct ip6_direct_ctx *)(mtag + 1); ip6dc->ip6dc_nxt = nxt; ip6dc->ip6dc_off = offset; m_tag_prepend(m, mtag); #endif IP6QB_UNLOCK(bucket); IP6STAT_INC(ip6s_reassembled); in6_ifstat_inc(dstifp, ifs6_reass_ok); #ifdef RSS /* Queue/dispatch for reprocessing. */ netisr_dispatch(NETISR_IPV6_DIRECT, m); *mp = NULL; return (IPPROTO_DONE); #endif /* Tell launch routine the next header. */ *mp = m; *offp = offset; return (nxt); dropfrag: IP6QB_UNLOCK(bucket); dropfrag2: in6_ifstat_inc(dstifp, ifs6_reass_fail); IP6STAT_INC(ip6s_fragdropped); m_freem(m); *mp = NULL; return (IPPROTO_DONE); } /* * IPv6 reassembling timer processing; * if a timer expires on a reassembly queue, discard it. */ -void -frag6_slowtimo(void) +static struct callout frag6_callout; +static void +frag6_slowtimo(void *arg __unused) { VNET_ITERATOR_DECL(vnet_iter); struct ip6qhead *head; struct ip6q *q6, *q6tmp; uint32_t bucket; if (atomic_load_int(&frag6_nfrags) == 0) - return; + goto done; VNET_LIST_RLOCK_NOSLEEP(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { if (V_ip6qb[bucket].count == 0) continue; IP6QB_LOCK(bucket); head = IP6QB_HEAD(bucket); TAILQ_FOREACH_SAFE(q6, head, ip6q_tq, q6tmp) if (--q6->ip6q_ttl == 0) { IP6STAT_ADD(ip6s_fragtimeout, q6->ip6q_nfrag); /* XXX in6_ifstat_inc(ifp, ifs6_reass_fail) */ frag6_freef(q6, bucket); } /* * If we are over the maximum number of fragments * (due to the limit being lowered), drain off * enough to get down to the new limit. * Note that we drain all reassembly queues if * maxfragpackets is 0 (fragmentation is disabled), * and do not enforce a limit when maxfragpackets * is negative. */ while ((V_ip6_maxfragpackets == 0 || (V_ip6_maxfragpackets > 0 && V_ip6qb[bucket].count > V_ip6_maxfragbucketsize)) && (q6 = TAILQ_LAST(head, ip6qhead)) != NULL) { IP6STAT_ADD(ip6s_fragoverflow, q6->ip6q_nfrag); /* XXX in6_ifstat_inc(ifp, ifs6_reass_fail) */ frag6_freef(q6, bucket); } IP6QB_UNLOCK(bucket); } /* * If we are still over the maximum number of fragmented * packets, drain off enough to get down to the new limit. */ bucket = 0; while (V_ip6_maxfragpackets >= 0 && atomic_load_int(&V_frag6_nfragpackets) > (u_int)V_ip6_maxfragpackets) { IP6QB_LOCK(bucket); q6 = TAILQ_LAST(IP6QB_HEAD(bucket), ip6qhead); if (q6 != NULL) { IP6STAT_ADD(ip6s_fragoverflow, q6->ip6q_nfrag); /* XXX in6_ifstat_inc(ifp, ifs6_reass_fail) */ frag6_freef(q6, bucket); } IP6QB_UNLOCK(bucket); bucket = (bucket + 1) % IP6REASS_NHASH; } CURVNET_RESTORE(); } VNET_LIST_RUNLOCK_NOSLEEP(); +done: + callout_reset_sbt(&frag6_callout, SBT_1MS * 500, SBT_1MS * 10, + frag6_slowtimo, NULL, 0); +} + +static void +frag6_slowtimo_init(void *arg __unused) +{ + + callout_init(&frag6_callout, 1); + callout_reset_sbt(&frag6_callout, SBT_1MS * 500, SBT_1MS * 10, + frag6_slowtimo, NULL, 0); } +SYSINIT(frag6, SI_SUB_VNET_DONE, SI_ORDER_ANY, frag6_slowtimo_init, NULL); /* * Eventhandler to adjust limits in case nmbclusters change. */ static void frag6_change(void *tag) { VNET_ITERATOR_DECL(vnet_iter); ip6_maxfrags = IP6_MAXFRAGS; VNET_LIST_RLOCK_NOSLEEP(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); V_ip6_maxfragpackets = IP6_MAXFRAGPACKETS; frag6_set_bucketsize(); CURVNET_RESTORE(); } VNET_LIST_RUNLOCK_NOSLEEP(); } /* * Initialise reassembly queue and fragment identifier. */ void frag6_init(void) { uint32_t bucket; V_ip6_maxfragpackets = IP6_MAXFRAGPACKETS; frag6_set_bucketsize(); for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { TAILQ_INIT(IP6QB_HEAD(bucket)); mtx_init(&V_ip6qb[bucket].lock, "ip6qb", NULL, MTX_DEF); V_ip6qb[bucket].count = 0; } V_ip6qb_hashseed = arc4random(); V_ip6_maxfragsperpacket = 64; #ifdef VIMAGE V_frag6_on = true; #endif if (!IS_DEFAULT_VNET(curvnet)) return; ip6_maxfrags = IP6_MAXFRAGS; EVENTHANDLER_REGISTER(nmbclusters_change, frag6_change, NULL, EVENTHANDLER_PRI_ANY); } /* * Drain off all datagram fragments. */ static void frag6_drain_one(void) { struct ip6q *q6; uint32_t bucket; for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { IP6QB_LOCK(bucket); while ((q6 = TAILQ_FIRST(IP6QB_HEAD(bucket))) != NULL) { IP6STAT_INC(ip6s_fragdropped); /* XXX in6_ifstat_inc(ifp, ifs6_reass_fail) */ frag6_freef(q6, bucket); } IP6QB_UNLOCK(bucket); } } void frag6_drain(void) { VNET_ITERATOR_DECL(vnet_iter); VNET_LIST_RLOCK_NOSLEEP(); VNET_FOREACH(vnet_iter) { CURVNET_SET(vnet_iter); frag6_drain_one(); CURVNET_RESTORE(); } VNET_LIST_RUNLOCK_NOSLEEP(); } #ifdef VIMAGE /* * Clear up IPv6 reassembly structures. */ void frag6_destroy(void) { uint32_t bucket; frag6_drain_one(); V_frag6_on = false; for (bucket = 0; bucket < IP6REASS_NHASH; bucket++) { KASSERT(V_ip6qb[bucket].count == 0, ("%s: V_ip6qb[%d] (%p) count not 0 (%d)", __func__, bucket, &V_ip6qb[bucket], V_ip6qb[bucket].count)); mtx_destroy(&V_ip6qb[bucket].lock); } } #endif diff --git a/sys/netinet6/in6_proto.c b/sys/netinet6/in6_proto.c index f437234b71a3..52534c579003 100644 --- a/sys/netinet6/in6_proto.c +++ b/sys/netinet6/in6_proto.c @@ -1,574 +1,573 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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 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: in6_proto.c,v 1.91 2001/05/27 13:28:35 itojun Exp $ */ /*- * Copyright (c) 1982, 1986, 1993 * 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. * * @(#)in_proto.c 8.1 (Berkeley) 6/10/93 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_ipstealth.h" #include "opt_sctp.h" #include "opt_route.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 #ifdef SCTP #include #include #include #include #include #endif /* SCTP */ #include /* * TCP/IP protocol family: IP6, ICMP6, UDP, TCP. */ FEATURE(inet6, "Internet Protocol version 6"); extern struct domain inet6domain; static struct pr_usrreqs nousrreqs; #define PR_LISTEN 0 #define PR_ABRTACPTDIS 0 /* Spacer for loadable protocols. */ #define IP6PROTOSPACER \ { \ .pr_domain = &inet6domain, \ .pr_protocol = PROTO_SPACER, \ .pr_usrreqs = &nousrreqs \ } struct protosw inet6sw[] = { { .pr_type = 0, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_IPV6, .pr_flags = PR_CAPATTACH, - .pr_slowtimo = frag6_slowtimo, .pr_drain = frag6_drain, .pr_usrreqs = &nousrreqs, }, { .pr_type = SOCK_DGRAM, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_UDP, .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, .pr_ctloutput = ip6_ctloutput, .pr_usrreqs = &udp6_usrreqs, }, { .pr_type = SOCK_STREAM, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_TCP, .pr_flags = PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD| PR_LISTEN|PR_CAPATTACH, .pr_ctloutput = tcp_ctloutput, #ifndef INET /* don't call initialization, timeout, and drain routines twice */ .pr_drain = tcp_drain, #endif .pr_usrreqs = &tcp6_usrreqs, }, #ifdef SCTP { .pr_type = SOCK_SEQPACKET, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_SCTP, .pr_flags = PR_WANTRCVD, .pr_ctloutput = sctp_ctloutput, #ifndef INET /* Do not call initialization and drain routines twice. */ .pr_drain = sctp_drain, #endif .pr_usrreqs = &sctp6_usrreqs }, { .pr_type = SOCK_STREAM, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_SCTP, .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD, .pr_ctloutput = sctp_ctloutput, .pr_drain = NULL, /* Covered by the SOCK_SEQPACKET entry. */ .pr_usrreqs = &sctp6_usrreqs }, #endif /* SCTP */ { .pr_type = SOCK_DGRAM, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_UDPLITE, .pr_flags = PR_ATOMIC|PR_ADDR|PR_CAPATTACH, .pr_ctloutput = udp_ctloutput, .pr_usrreqs = &udp6_usrreqs, }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_RAW, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_ICMPV6, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_DSTOPTS, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_usrreqs = &nousrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_ROUTING, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_usrreqs = &nousrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_FRAGMENT, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_usrreqs = &nousrreqs }, #ifdef INET { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_IPV4, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, #endif /* INET */ { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_IPV6, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_ETHERIP, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_GRE, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_protocol = IPPROTO_PIM, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, /* Spacer n-times for loadable protocols. */ IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, IP6PROTOSPACER, /* raw wildcard */ { .pr_type = SOCK_RAW, .pr_domain = &inet6domain, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_ctloutput = rip6_ctloutput, .pr_usrreqs = &rip6_usrreqs }, }; struct domain inet6domain = { .dom_family = AF_INET6, .dom_name = "internet6", .dom_protosw = (struct protosw *)inet6sw, .dom_protoswNPROTOSW = (struct protosw *)&inet6sw[nitems(inet6sw)], .dom_rtattach = in6_inithead, #ifdef VIMAGE .dom_rtdetach = in6_detachhead, #endif .dom_ifattach = in6_domifattach, .dom_ifdetach = in6_domifdetach, .dom_ifmtu = in6_domifmtu }; DOMAIN_SET(inet6); /* * Internet configuration info */ #ifndef IPV6FORWARDING #ifdef GATEWAY6 #define IPV6FORWARDING 1 /* forward IP6 packets not for us */ #else #define IPV6FORWARDING 0 /* don't forward IP6 packets not for us */ #endif /* GATEWAY6 */ #endif /* !IPV6FORWARDING */ #ifndef IPV6_SENDREDIRECTS #define IPV6_SENDREDIRECTS 1 #endif VNET_DEFINE(int, ip6_forwarding) = IPV6FORWARDING; /* act as router? */ VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS; VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM; VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS; VNET_DEFINE(int, ip6_accept_rtadv) = 0; VNET_DEFINE(int, ip6_no_radr) = 0; VNET_DEFINE(int, ip6_norbit_raif) = 0; VNET_DEFINE(int, ip6_rfc6204w3) = 0; VNET_DEFINE(int, ip6_log_interval) = 5; VNET_DEFINE(int, ip6_hdrnestlimit) = 15;/* How many header options will we * process? */ VNET_DEFINE(int, ip6_dad_count) = 1; /* DupAddrDetectionTransmits */ VNET_DEFINE(int, ip6_auto_flowlabel) = 1; VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr * (RFC2462 5.5.4) */ VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix * walk list every 5 sec. */ VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast? */ VNET_DEFINE(int, ip6_v6only) = 1; VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L; #ifdef IPSTEALTH VNET_DEFINE(int, ip6stealth) = 0; #endif VNET_DEFINE(int, nd6_onlink_ns_rfc4861) = 0;/* allow 'on-link' nd6 NS * (RFC 4861) */ /* icmp6 */ /* * BSDI4 defines these variables in in_proto.c... * XXX: what if we don't define INET? Should we define pmtu6_expire * or so? (jinmei@kame.net 19990310) */ VNET_DEFINE(int, pmtu_expire) = 60*10; VNET_DEFINE(int, pmtu_probe) = 60*2; /* ICMPV6 parameters */ VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */ VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */ VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */ /* control how to respond to NI queries */ VNET_DEFINE(int, icmp6_nodeinfo) = (ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK); VNET_DEFINE(int, icmp6_nodeinfo_oldmcprefix) = 1; /* * sysctl related items. */ SYSCTL_NODE(_net, PF_INET6, inet6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "Internet6 Family"); /* net.inet6 */ SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "IP6"); SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "ICMP6"); SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "UDP6"); SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "TCP6"); #if defined(SCTP) || defined(SCTP_SUPPORT) SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "SCTP6"); #endif #if defined(IPSEC) || defined(IPSEC_SUPPORT) SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "IPSEC6"); #endif /* IPSEC */ /* net.inet6.ip6 */ static int sysctl_ip6_temppltime(SYSCTL_HANDLER_ARGS) { int error, val; val = V_ip6_temp_preferred_lifetime; error = sysctl_handle_int(oidp, &val, 0, req); if (error != 0 || !req->newptr) return (error); if (val < V_ip6_desync_factor + V_ip6_temp_regen_advance) return (EINVAL); V_ip6_temp_preferred_lifetime = val; return (0); } static int sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARGS) { int error, val; val = V_ip6_temp_valid_lifetime; error = sysctl_handle_int(oidp, &val, 0, req); if (error != 0 || !req->newptr) return (error); if (val < V_ip6_temp_preferred_lifetime) return (EINVAL); V_ip6_temp_valid_lifetime = val; return (0); } SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, "Enable forwarding of IPv6 packets between interfaces"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, "Send ICMPv6 redirects for unforwardable IPv6 packets"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0, "Default hop limit to use for outgoing IPv6 packets"); SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat, ip6stat, "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0, "Default value of per-interface flag for accepting ICMPv6 RA messages"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0, "Default value of per-interface flag to control whether routers " "sending ICMPv6 RA messages on that interface are added into the " "default router list"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_norbit_raif), 0, "Always set clear the R flag in ICMPv6 NA messages when accepting RA " "on the interface"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0, "Accept the default router list from ICMPv6 RA messages even " "when packet forwarding is enabled"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, "Frequency in seconds at which to log IPv6 forwarding errors"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, "Default maximum number of IPv6 extension headers permitted on " "incoming IPv6 packets, 0 for no artificial limit"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, "Number of ICMPv6 NS messages sent during duplicate address detection"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, "Provide an IPv6 flowlabel in outbound packets"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, "Default hop limit for IPv6 multicast packets originating from this " "node"); SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version, CTLFLAG_RD, __KAME_VERSION, 0, "KAME version string"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, "Allow the use of addresses whose preferred lifetimes have expired"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, ""); /* XXX unused */ SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, "Create RFC3041 temporary addresses for autoconfigured addresses"); SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_ip6_temppltime, "I", "Maximum preferred lifetime for temporary addresses"); SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime, CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, NULL, 0, sysctl_ip6_tempvltime, "I", "Maximum valid lifetime for temporary addresses"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, "Restrict AF_INET6 sockets to IPv6 addresses only"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0, "Default value of per-interface flag for automatically adding an IPv6 " "link-local address to interfaces when attached"); SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, struct rip6stat, rip6stat, "Raw IP6 statistics (struct rip6stat, netinet6/raw_ip6.h)"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, "Prefer RFC3041 temporary addresses in source address selection"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0, "Use the default scope zone when none is specified"); SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_mcast_pmtu), 0, "Enable path MTU discovery for multicast packets"); #ifdef IPSTEALTH SYSCTL_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6stealth), 0, "Forward IPv6 packets without decrementing their TTL"); #endif /* net.inet6.icmp6 */ SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, "Accept ICMPv6 redirect messages"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, "Delay in seconds before expiring redirect route"); SYSCTL_VNET_PCPUSTAT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, struct icmp6stat, icmp6stat, "ICMPv6 statistics (struct icmp6stat, netinet/icmp6.h)"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_prune), 0, "Frequency in seconds of checks for expired prefixes and routers"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_delay), 0, "Delay in seconds before probing for reachability"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, "Number of ICMPv6 NS messages sent during reachability detection"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, "Number of ICMPv6 NS messages sent during address resolution"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, "Create a loopback route when configuring an IPv6 address"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo), 0, "Mask of enabled RFC4620 node information query types"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO_OLDMCPREFIX, nodeinfo_oldmcprefix, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6_nodeinfo_oldmcprefix), 0, "Join old IPv6 NI group address in draft-ietf-ipngwg-icmp-name-lookup " "for compatibility with KAME implementation"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, "Maximum number of ICMPv6 error messages per second"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, ""); /* XXX unused */ SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_debug), 0, "Log NDP debug messages"); SYSCTL_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861, nd6_onlink_ns_rfc4861, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_onlink_ns_rfc4861), 0, "Accept 'on-link' ICMPv6 NS messages in compliance with RFC 4861"); #ifdef EXPERIMENTAL SYSCTL_INT(_net_inet6_icmp6, OID_AUTO, nd6_ignore_ipv6_only_ra, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(nd6_ignore_ipv6_only_ra), 0, "Ignore the 'IPv6-Only flag' in RA messages in compliance with " "draft-ietf-6man-ipv6only-flag"); #endif diff --git a/sys/netinet6/ip6_var.h b/sys/netinet6/ip6_var.h index 9d997e772ba4..c78cf52946fe 100644 --- a/sys/netinet6/ip6_var.h +++ b/sys/netinet6/ip6_var.h @@ -1,419 +1,418 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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 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: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $ */ /*- * Copyright (c) 1982, 1986, 1993 * 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. * * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 * $FreeBSD$ */ #ifndef _NETINET6_IP6_VAR_H_ #define _NETINET6_IP6_VAR_H_ #include #ifdef _KERNEL struct ip6asfrag; /* frag6.c */ TAILQ_HEAD(ip6fraghead, ip6asfrag); /* * IP6 reassembly queue structure. Each fragment * being reassembled is attached to one of these structures. */ struct ip6q { struct ip6fraghead ip6q_frags; u_int32_t ip6q_ident; u_int8_t ip6q_nxt; u_int8_t ip6q_ecn; u_int8_t ip6q_ttl; struct in6_addr ip6q_src, ip6q_dst; TAILQ_ENTRY(ip6q) ip6q_tq; int ip6q_unfrglen; /* len of unfragmentable part */ int ip6q_nfrag; /* # of fragments */ struct label *ip6q_label; }; #endif /* _KERNEL */ /* * IP6 reinjecting structure. */ struct ip6_direct_ctx { uint32_t ip6dc_nxt; /* next header to process */ uint32_t ip6dc_off; /* offset to next header */ }; #if defined(_NETINET6_IN6_VAR_H_) && defined(_KERNEL) /* * Structure attached to inpcb.in6p_moptions and * passed to ip6_output when IPv6 multicast options are in use. * This structure is lazy-allocated. */ struct ip6_moptions { struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ struct ip6_mfilter_head im6o_head; /* group membership list */ }; #else struct ip6_moptions; #endif /* * Control options for outgoing packets */ /* Routing header related info */ struct ip6po_rhinfo { struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ }; #define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr #define ip6po_route ip6po_rhinfo.ip6po_rhi_route /* Nexthop related info */ struct ip6po_nhinfo { struct sockaddr *ip6po_nhi_nexthop; struct route_in6 ip6po_nhi_route; /* Route to the nexthop */ }; #define ip6po_nexthop ip6po_nhinfo.ip6po_nhi_nexthop #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route struct ip6_pktopts { struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ int ip6po_hlim; /* Hoplimit for outgoing packets */ /* Outgoing IF/address information */ struct in6_pktinfo *ip6po_pktinfo; /* Next-hop address information */ struct ip6po_nhinfo ip6po_nhinfo; struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ /* Destination options header (before a routing header) */ struct ip6_dest *ip6po_dest1; /* Routing header related info. */ struct ip6po_rhinfo ip6po_rhinfo; /* Destination options header (after a routing header) */ struct ip6_dest *ip6po_dest2; int ip6po_tclass; /* traffic class */ int ip6po_minmtu; /* fragment vs PMTU discovery policy */ #define IP6PO_MINMTU_MCASTONLY -1 /* default; send at min MTU for multicast*/ #define IP6PO_MINMTU_DISABLE 0 /* always perform pmtu disc */ #define IP6PO_MINMTU_ALL 1 /* always send at min MTU */ int ip6po_prefer_tempaddr; /* whether temporary addresses are preferred as source address */ #define IP6PO_TEMPADDR_SYSTEM -1 /* follow the system default */ #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */ #define IP6PO_TEMPADDR_PREFER 1 /* prefer temporary address */ int ip6po_flags; #if 0 /* parameters in this block is obsolete. do not reuse the values. */ #define IP6PO_REACHCONF 0x01 /* upper-layer reachability confirmation. */ #define IP6PO_MINMTU 0x02 /* use minimum MTU (IPV6_USE_MIN_MTU) */ #endif #define IP6PO_DONTFRAG 0x04 /* disable fragmentation (IPV6_DONTFRAG) */ #define IP6PO_USECOA 0x08 /* use care of address */ }; /* * Control options for incoming packets */ struct ip6stat { uint64_t ip6s_total; /* total packets received */ uint64_t ip6s_tooshort; /* packet too short */ uint64_t ip6s_toosmall; /* not enough data */ uint64_t ip6s_fragments; /* fragments received */ uint64_t ip6s_fragdropped; /* frags dropped(dups, out of space) */ uint64_t ip6s_fragtimeout; /* fragments timed out */ uint64_t ip6s_fragoverflow; /* fragments that exceeded limit */ uint64_t ip6s_forward; /* packets forwarded */ uint64_t ip6s_cantforward; /* packets rcvd for unreachable dest */ uint64_t ip6s_redirectsent; /* packets forwarded on same net */ uint64_t ip6s_delivered; /* datagrams delivered to upper level*/ uint64_t ip6s_localout; /* total ip packets generated here */ uint64_t ip6s_odropped; /* lost packets due to nobufs, etc. */ uint64_t ip6s_reassembled; /* total packets reassembled ok */ uint64_t ip6s_atomicfrags; /* atomic fragments */ uint64_t ip6s_fragmented; /* datagrams successfully fragmented */ uint64_t ip6s_ofragments; /* output fragments created */ uint64_t ip6s_cantfrag; /* don't fragment flag was set, etc. */ uint64_t ip6s_badoptions; /* error in option processing */ uint64_t ip6s_noroute; /* packets discarded due to no route */ uint64_t ip6s_badvers; /* ip6 version != 6 */ uint64_t ip6s_rawout; /* total raw ip packets generated */ uint64_t ip6s_badscope; /* scope error */ uint64_t ip6s_notmember; /* don't join this multicast group */ #define IP6S_HDRCNT 256 /* headers count */ uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */ uint64_t ip6s_m1; /* one mbuf */ #define IP6S_M2MMAX 32 uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */ uint64_t ip6s_mext1; /* one ext mbuf */ uint64_t ip6s_mext2m; /* two or more ext mbuf */ uint64_t ip6s_exthdrtoolong; /* ext hdr are not contiguous */ uint64_t ip6s_nogif; /* no match gif found */ uint64_t ip6s_toomanyhdr; /* discarded due to too many headers */ /* * statistics for improvement of the source address selection * algorithm: * XXX: hardcoded 16 = # of ip6 multicast scope types + 1 */ #define IP6S_RULESMAX 16 #define IP6S_SCOPECNT 16 /* number of times that address selection fails */ uint64_t ip6s_sources_none; /* number of times that an address on the outgoing I/F is chosen */ uint64_t ip6s_sources_sameif[IP6S_SCOPECNT]; /* number of times that an address on a non-outgoing I/F is chosen */ uint64_t ip6s_sources_otherif[IP6S_SCOPECNT]; /* * number of times that an address that has the same scope * from the destination is chosen. */ uint64_t ip6s_sources_samescope[IP6S_SCOPECNT]; /* * number of times that an address that has a different scope * from the destination is chosen. */ uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT]; /* number of times that a deprecated address is chosen */ uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT]; /* number of times that each rule of source selection is applied. */ uint64_t ip6s_sources_rule[IP6S_RULESMAX]; }; #ifdef _KERNEL #include VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat); #define IP6STAT_ADD(name, val) \ VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val)) #define IP6STAT_SUB(name, val) IP6STAT_ADD(name, -(val)) #define IP6STAT_INC(name) IP6STAT_ADD(name, 1) #define IP6STAT_DEC(name) IP6STAT_SUB(name, 1) #endif #ifdef _KERNEL /* flags passed to ip6_output as last parameter */ #define IPV6_UNSPECSRC 0x01 /* allow :: as the source address */ #define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ #define IPV6_MINMTU 0x04 /* use minimum MTU (IPV6_USE_MIN_MTU) */ #ifdef __NO_STRICT_ALIGNMENT #define IP6_HDR_ALIGNED_P(ip) 1 #else #define IP6_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) #endif VNET_DECLARE(int, ip6_defhlim); /* default hop limit */ VNET_DECLARE(int, ip6_defmcasthlim); /* default multicast hop limit */ VNET_DECLARE(int, ip6_forwarding); /* act as router? */ VNET_DECLARE(int, ip6_use_deprecated); /* allow deprecated addr as source */ VNET_DECLARE(int, ip6_rr_prune); /* router renumbering prefix * walk list every 5 sec. */ VNET_DECLARE(int, ip6_mcast_pmtu); /* enable pMTU discovery for multicast? */ VNET_DECLARE(int, ip6_v6only); #define V_ip6_defhlim VNET(ip6_defhlim) #define V_ip6_defmcasthlim VNET(ip6_defmcasthlim) #define V_ip6_forwarding VNET(ip6_forwarding) #define V_ip6_use_deprecated VNET(ip6_use_deprecated) #define V_ip6_rr_prune VNET(ip6_rr_prune) #define V_ip6_mcast_pmtu VNET(ip6_mcast_pmtu) #define V_ip6_v6only VNET(ip6_v6only) VNET_DECLARE(struct socket *, ip6_mrouter); /* multicast routing daemon */ VNET_DECLARE(int, ip6_sendredirects); /* send IP redirects when forwarding? */ VNET_DECLARE(int, ip6_accept_rtadv); /* Acts as a host not a router */ VNET_DECLARE(int, ip6_no_radr); /* No defroute from RA */ VNET_DECLARE(int, ip6_norbit_raif); /* Disable R-bit in NA on RA * receiving IF. */ VNET_DECLARE(int, ip6_rfc6204w3); /* Accept defroute from RA even when forwarding enabled */ VNET_DECLARE(int, ip6_log_interval); VNET_DECLARE(time_t, ip6_log_time); VNET_DECLARE(int, ip6_hdrnestlimit); /* upper limit of # of extension * headers */ VNET_DECLARE(int, ip6_dad_count); /* DupAddrDetectionTransmits */ #define V_ip6_mrouter VNET(ip6_mrouter) #define V_ip6_sendredirects VNET(ip6_sendredirects) #define V_ip6_accept_rtadv VNET(ip6_accept_rtadv) #define V_ip6_no_radr VNET(ip6_no_radr) #define V_ip6_norbit_raif VNET(ip6_norbit_raif) #define V_ip6_rfc6204w3 VNET(ip6_rfc6204w3) #define V_ip6_log_interval VNET(ip6_log_interval) #define V_ip6_log_time VNET(ip6_log_time) #define V_ip6_hdrnestlimit VNET(ip6_hdrnestlimit) #define V_ip6_dad_count VNET(ip6_dad_count) VNET_DECLARE(int, ip6_auto_flowlabel); VNET_DECLARE(int, ip6_auto_linklocal); #define V_ip6_auto_flowlabel VNET(ip6_auto_flowlabel) #define V_ip6_auto_linklocal VNET(ip6_auto_linklocal) VNET_DECLARE(int, ip6_use_tempaddr); /* Whether to use temporary addresses */ VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary * addresses in the source address * selection */ #define V_ip6_use_tempaddr VNET(ip6_use_tempaddr) #define V_ip6_prefer_tempaddr VNET(ip6_prefer_tempaddr) VNET_DECLARE(int, ip6_use_defzone); /* Whether to use the default scope * zone when unspecified */ #define V_ip6_use_defzone VNET(ip6_use_defzone) VNET_DECLARE(struct pfil_head *, inet6_pfil_head); #define V_inet6_pfil_head VNET(inet6_pfil_head) #define PFIL_INET6_NAME "inet6" #ifdef IPSTEALTH VNET_DECLARE(int, ip6stealth); #define V_ip6stealth VNET(ip6stealth) #endif #ifdef EXPERIMENTAL VNET_DECLARE(int, nd6_ignore_ipv6_only_ra); #define V_nd6_ignore_ipv6_only_ra VNET(nd6_ignore_ipv6_only_ra) #endif extern struct pr_usrreqs rip6_usrreqs; struct sockopt; struct inpcb; int icmp6_ctloutput(struct socket *, struct sockopt *sopt); void ip6_input(struct mbuf *); void ip6_direct_input(struct mbuf *); void ip6_freepcbopts(struct ip6_pktopts *); int ip6_unknown_opt(u_int8_t *, struct mbuf *, int); int ip6_get_prevhdr(const struct mbuf *, int); int ip6_nexthdr(const struct mbuf *, int, int, int *); int ip6_lasthdr(const struct mbuf *, int, int, int *); extern int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, u_int32_t *); struct mbuf **ip6_savecontrol_v4(struct inpcb *, struct mbuf *, struct mbuf **, int *); void ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **); void ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t); int ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t); void ip6_forward(struct mbuf *, int); void ip6_mloopback(struct ifnet *, struct mbuf *); int ip6_output(struct mbuf *, struct ip6_pktopts *, struct route_in6 *, int, struct ip6_moptions *, struct ifnet **, struct inpcb *); int ip6_ctloutput(struct socket *, struct sockopt *); int ip6_raw_ctloutput(struct socket *, struct sockopt *); void ip6_initpktopts(struct ip6_pktopts *); int ip6_setpktopts(struct mbuf *, struct ip6_pktopts *, struct ip6_pktopts *, struct ucred *, int); void ip6_clearpktopts(struct ip6_pktopts *, int); struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int); int ip6_optlen(struct inpcb *); int ip6_deletefraghdr(struct mbuf *, int, int); int ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int, uint32_t); int route6_input(struct mbuf **, int *, int); void frag6_init(void); void frag6_destroy(void); int frag6_input(struct mbuf **, int *, int); -void frag6_slowtimo(void); void frag6_drain(void); void rip6_init(void); int rip6_input(struct mbuf **, int *, int); void rip6_ctlinput(int, struct sockaddr *, void *); int rip6_ctloutput(struct socket *, struct sockopt *); int rip6_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *); int dest6_input(struct mbuf **, int *, int); int none_input(struct mbuf **, int *, int); int in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *, struct inpcb *, struct ucred *, int, struct in6_addr *, int *); int in6_selectsrc_addr(uint32_t, const struct in6_addr *, uint32_t, struct ifnet *, struct in6_addr *, int *); int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *, struct ip6_moptions *, struct route_in6 *, struct ifnet **, struct nhop_object **, u_int, uint32_t); u_int32_t ip6_randomid(void); u_int32_t ip6_randomflowlabel(void); void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset); #endif /* _KERNEL */ #endif /* !_NETINET6_IP6_VAR_H_ */