Index: projects/ifnet/sys/net/if_loop.c =================================================================== --- projects/ifnet/sys/net/if_loop.c (revision 277241) +++ projects/ifnet/sys/net/if_loop.c (revision 277242) @@ -1,440 +1,390 @@ /*- * 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. * 4. 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. * * @(#)if_loop.c 8.2 (Berkeley) 1/9/95 * $FreeBSD$ */ /* * Loopback interface driver for protocol testing and timing. */ #include "opt_inet.h" #include "opt_inet6.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #endif #ifdef INET6 #ifndef INET #include #endif #include #endif #include #ifdef TINY_LOMTU #define LOMTU (1024+512) #elif defined(LARGE_LOMTU) #define LOMTU 131072 #else #define LOMTU 16384 #endif #define LO_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP) #define LO_CSUM_FEATURES6 (CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_SCTP_IPV6) #define LO_CSUM_SET (CSUM_DATA_VALID | CSUM_DATA_VALID_IPV6 | \ CSUM_PSEUDO_HDR | \ CSUM_IP_CHECKED | CSUM_IP_VALID | \ CSUM_SCTP_VALID) int if_simloop(if_t, struct mbuf *, int, int); static int loioctl(if_t, u_long, void *, struct thread *); static int looutput(if_t, struct mbuf *, const struct sockaddr *, struct route *); static int lo_clone_create(struct if_clone *, int, caddr_t); static void lo_clone_destroy(if_t); VNET_DEFINE(if_t, loif); /* Used externally. */ #define V_loif VNET(loif) #ifdef VIMAGE static VNET_DEFINE(struct if_clone *, lo_cloner); #define V_lo_cloner VNET(lo_cloner) #endif static struct if_clone *lo_cloner; static const char loname[] = "lo"; static struct ifdriver lo_ifdrv = { .ifdrv_ops = { .ifop_origin = IFOP_ORIGIN_DRIVER, .ifop_ioctl = loioctl, .ifop_output = looutput, }, .ifdrv_name = loname, .ifdrv_type = IFT_LOOP, .ifdrv_dlt = DLT_NULL, .ifdrv_dlt_hdrlen = sizeof(uint32_t), }; static void lo_clone_destroy(if_t ifp) { #ifndef VIMAGE /* XXX: destroying lo0 will lead to panics. */ KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__)); #endif if_detach(ifp); } static int lo_clone_create(struct if_clone *ifc, int unit, caddr_t params) { struct if_attach_args ifat = { .ifat_version = IF_ATTACH_VERSION, .ifat_drv = &lo_ifdrv, .ifat_dunit = unit, .ifat_mtu = LOMTU, .ifat_flags = IFF_LOOPBACK | IFF_MULTICAST, .ifat_capabilities = IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6, .ifat_capenable = IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6, .ifat_hwassist = LO_CSUM_FEATURES | LO_CSUM_FEATURES6, }; if_t ifp; ifp = if_attach(&ifat); if (V_loif == NULL) V_loif = ifp; return (0); } static void vnet_loif_init(const void *unused __unused) { #ifdef VIMAGE lo_cloner = if_clone_simple(loname, lo_clone_create, lo_clone_destroy, 1); V_lo_cloner = lo_cloner; #else lo_cloner = if_clone_simple(loname, lo_clone_create, lo_clone_destroy, 1); #endif } VNET_SYSINIT(vnet_loif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, vnet_loif_init, NULL); #ifdef VIMAGE static void vnet_loif_uninit(const void *unused __unused) { if_clone_detach(V_lo_cloner); V_loif = NULL; } VNET_SYSUNINIT(vnet_loif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, vnet_loif_uninit, NULL); #endif static int loop_modevent(module_t mod, int type, void *data) { switch (type) { case MOD_LOAD: break; case MOD_UNLOAD: printf("loop module unload - not possible for this module type\n"); return (EINVAL); default: return (EOPNOTSUPP); } return (0); } static moduledata_t loop_mod = { "if_lo", loop_modevent, 0 }; DECLARE_MODULE(if_lo, loop_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY); int looutput(if_t ifp, struct mbuf *m, const struct sockaddr *dst, struct route *ro) { u_int32_t af; struct rtentry *rt = NULL; #ifdef MAC int error; #endif M_ASSERTPKTHDR(m); /* check if we have the packet header */ if (ro != NULL) rt = ro->ro_rt; #ifdef MAC error = mac_ifnet_check_transmit(ifp, m); if (error) { m_freem(m); return (error); } #endif if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) { m_freem(m); return (rt->rt_flags & RTF_BLACKHOLE ? 0 : rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH); } if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); /* BPF writes need to be handled specially. */ if (dst->sa_family == AF_UNSPEC) bcopy(dst->sa_data, &af, sizeof(af)); else af = dst->sa_family; -#if 1 /* XXX */ switch (af) { case AF_INET: - if (if_get(ifp, IF_CAPENABLE) & IFCAP_RXCSUM) { - m->m_pkthdr.csum_data = 0xffff; - m->m_pkthdr.csum_flags = LO_CSUM_SET; - } + m->m_pkthdr.csum_data = 0xffff; + m->m_pkthdr.csum_flags = LO_CSUM_SET; m->m_pkthdr.csum_flags &= ~LO_CSUM_FEATURES; break; case AF_INET6: -#if 0 - /* - * XXX-BZ for now always claim the checksum is good despite - * any interface flags. This is a workaround for 9.1-R and - * a proper solution ought to be sought later. - */ - if (ifp->if_capenable & IFCAP_RXCSUM_IPV6) { - m->m_pkthdr.csum_data = 0xffff; - m->m_pkthdr.csum_flags = LO_CSUM_SET; - } -#else m->m_pkthdr.csum_data = 0xffff; m->m_pkthdr.csum_flags = LO_CSUM_SET; -#endif m->m_pkthdr.csum_flags &= ~LO_CSUM_FEATURES6; break; default: printf("looutput: af=%d unexpected\n", af); m_freem(m); return (EAFNOSUPPORT); } -#endif return (if_simloop(ifp, m, af, 0)); } /* * if_simloop() * * This function is to support software emulation of hardware loopback, * i.e., for interfaces with the IFF_SIMPLEX attribute. Since they can't * hear their own broadcasts, we create a copy of the packet that we * would normally receive via a hardware loopback. * * This function expects the packet to include the media header of length hlen. */ int if_simloop(if_t ifp, struct mbuf *m, int af, int hlen) { int isr; M_ASSERTPKTHDR(m); m_tag_delete_nonpersistent(m); m->m_pkthdr.rcvif = ifp; #ifdef MAC mac_ifnet_create_mbuf(ifp, m); #endif /* * Let BPF see incoming packet in the following manner: * - Emulated packet loopback for a simplex interface * (net/if_ethersubr.c) * -> passes it to ifp's BPF * - IPv4/v6 multicast packet loopback (netinet(6)/ip(6)_output.c) * -> not passes it to any BPF * - Normal packet loopback from myself to myself (net/if_loop.c) * -> passes to lo0's BPF (even in case of IPv6, where ifp!=lo0) */ if (hlen > 0) if_mtap(ifp, m, NULL, 0); else if ((m->m_flags & M_MCAST) == 0 || V_loif == ifp) if_mtap(V_loif, m, &af, sizeof(af)); /* Strip away media header */ if (hlen > 0) { m_adj(m, hlen); #ifndef __NO_STRICT_ALIGNMENT /* * Some archs do not like unaligned data, so * we move data down in the first mbuf. */ if (mtod(m, vm_offset_t) & 3) { KASSERT(hlen >= 3, ("if_simloop: hlen too small")); bcopy(m->m_data, (char *)(mtod(m, vm_offset_t) - (mtod(m, vm_offset_t) & 3)), m->m_len); m->m_data -= (mtod(m,vm_offset_t) & 3); } #endif } /* Deliver to upper layer protocol */ switch (af) { #ifdef INET case AF_INET: isr = NETISR_IP; break; #endif #ifdef INET6 case AF_INET6: m->m_flags |= M_LOOP; isr = NETISR_IPV6; break; #endif default: printf("if_simloop: can't handle af=%d\n", af); m_freem(m); return (EAFNOSUPPORT); } if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); netisr_queue(isr, m); /* mbuf is free'd on failure. */ return (0); } /* * Process an ioctl request. */ /* ARGSUSED */ int loioctl(if_t ifp, u_long cmd, void *data, struct thread *td) { struct ifreq *ifr = (struct ifreq *)data; - int error = 0, mask; + int error = 0; switch (cmd) { case SIOCSIFADDR: if_addflags(ifp, IF_FLAGS, IFF_UP); /* * Everything else is done at a higher level. */ break; case SIOCADDMULTI: case SIOCDELMULTI: if (ifr == 0) { error = EAFNOSUPPORT; /* XXX */ break; } switch (ifr->ifr_addr.sa_family) { #ifdef INET case AF_INET: break; #endif #ifdef INET6 case AF_INET6: break; #endif default: error = EAFNOSUPPORT; break; } break; case SIOCSIFMTU: - if_set(ifp, IF_MTU, ifr->ifr_mtu); - break; - case SIOCSIFFLAGS: - break; - - case SIOCSIFCAP: - mask = if_get(ifp, IF_CAPENABLE) ^ ifr->ifr_reqcap; - if ((mask & IFCAP_RXCSUM) != 0) - if_xorflags(ifp, IF_CAPENABLE, IFCAP_RXCSUM); - if ((mask & IFCAP_TXCSUM) != 0) - if_xorflags(ifp, IF_CAPENABLE, IFCAP_TXCSUM); - if ((mask & IFCAP_RXCSUM_IPV6) != 0) { -#if 0 - if_xorflags(ifp, IF_CAPENABLE, IFCAP_RXCSUM_IPV6); -#else - error = EOPNOTSUPP; - break; -#endif - } - if ((mask & IFCAP_TXCSUM_IPV6) != 0) { -#if 0 - if_xorflags(ifp, IF_CAPENABLE, IFCAP_TXCSUM_IPV6); -#else - error = EOPNOTSUPP; - break; -#endif - } - if_set(ifp, IF_HWASSIST, 0); - if (if_get(ifp, IF_CAPENABLE) & IFCAP_TXCSUM) - if_set(ifp, IF_HWASSIST, LO_CSUM_FEATURES); -#if 0 - if (if_get(ifp, IF_CAPENABLE) & IFCAP_TXCSUM_IPV6) - if_addflags(ifp, IF_HWASSIST, LO_CSUM_FEATURES6); -#endif break; default: error = EINVAL; } return (error); }