diff --git a/sys/netinet6/in6_fib.c b/sys/netinet6/in6_fib.c index 0f471394d3ea..ae4beab3b5ce 100644 --- a/sys/netinet6/in6_fib.c +++ b/sys/netinet6/in6_fib.c @@ -1,280 +1,283 @@ /*- * Copyright (c) 2015 * Alexander V. Chernikov * * 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. */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_route.h" #include "opt_mpath.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef RADIX_MPATH #include #endif #include #include #include #include #include #include #include #include #include #ifdef INET6 static void fib6_rte_to_nh_extended(struct rtentry *rte, const struct in6_addr *dst, uint32_t flags, struct nhop6_extended *pnh6); static void fib6_rte_to_nh_basic(struct rtentry *rte, const struct in6_addr *dst, uint32_t flags, struct nhop6_basic *pnh6); static struct ifnet *fib6_get_ifaifp(struct rtentry *rte); #define RNTORT(p) ((struct rtentry *)(p)) +#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) + CHK_STRUCT_ROUTE_COMPAT(struct route_in6, ro_dst); /* * Gets real interface for the @rte. * Returns rt_ifp for !IFF_LOOPBACK routers. * Extracts "real" address interface from interface address * loopback routes. */ static struct ifnet * fib6_get_ifaifp(struct rtentry *rte) { struct ifnet *ifp; struct sockaddr_dl *sdl; ifp = rte->rt_ifp; if ((ifp->if_flags & IFF_LOOPBACK) && rte->rt_gateway->sa_family == AF_LINK) { sdl = (struct sockaddr_dl *)rte->rt_gateway; return (ifnet_byindex(sdl->sdl_index)); } return (ifp); } static void fib6_rte_to_nh_basic(struct rtentry *rte, const struct in6_addr *dst, uint32_t flags, struct nhop6_basic *pnh6) { struct sockaddr_in6 *gw; /* Do explicit nexthop zero unless we're copying it */ memset(pnh6, 0, sizeof(*pnh6)); if ((flags & NHR_IFAIF) != 0) pnh6->nh_ifp = fib6_get_ifaifp(rte); else pnh6->nh_ifp = rte->rt_ifp; pnh6->nh_mtu = min(rte->rt_mtu, IN6_LINKMTU(rte->rt_ifp)); if (rte->rt_flags & RTF_GATEWAY) { /* Return address with embedded scope. */ gw = (struct sockaddr_in6 *)rte->rt_gateway; pnh6->nh_addr = gw->sin6_addr; } else pnh6->nh_addr = *dst; /* Set flags */ pnh6->nh_flags = fib_rte_to_nh_flags(rte->rt_flags); gw = (struct sockaddr_in6 *)rt_key(rte); if (IN6_IS_ADDR_UNSPECIFIED(&gw->sin6_addr)) pnh6->nh_flags |= NHF_DEFAULT; } static void fib6_rte_to_nh_extended(struct rtentry *rte, const struct in6_addr *dst, uint32_t flags, struct nhop6_extended *pnh6) { struct sockaddr_in6 *gw; /* Do explicit nexthop zero unless we're copying it */ memset(pnh6, 0, sizeof(*pnh6)); if ((flags & NHR_IFAIF) != 0) pnh6->nh_ifp = fib6_get_ifaifp(rte); else pnh6->nh_ifp = rte->rt_ifp; pnh6->nh_mtu = min(rte->rt_mtu, IN6_LINKMTU(rte->rt_ifp)); if (rte->rt_flags & RTF_GATEWAY) { /* Return address with embedded scope. */ gw = (struct sockaddr_in6 *)rte->rt_gateway; pnh6->nh_addr = gw->sin6_addr; } else pnh6->nh_addr = *dst; /* Set flags */ pnh6->nh_flags = fib_rte_to_nh_flags(rte->rt_flags); gw = (struct sockaddr_in6 *)rt_key(rte); if (IN6_IS_ADDR_UNSPECIFIED(&gw->sin6_addr)) pnh6->nh_flags |= NHF_DEFAULT; + pnh6->nh_ia = ifatoia6(rte->rt_ifa); } /* * Performs IPv6 route table lookup on @dst. Returns 0 on success. * Stores basic nexthop info into provided @pnh6 structure. * Note that * - nh_ifp represents logical transmit interface (rt_ifp) by default * - nh_ifp represents "address" interface if NHR_IFAIF flag is passed * - mtu from logical transmit interface will be returned. * - nh_ifp cannot be safely dereferenced * - nh_ifp represents rt_ifp (e.g. if looking up address on * interface "ix0" pointer to "ix0" interface will be returned instead * of "lo0") * - howewer mtu from "transmit" interface will be returned. * - scope will be embedded in nh_addr */ int fib6_lookup_nh_basic(uint32_t fibnum, const struct in6_addr *dst, uint32_t scopeid, uint32_t flags, uint32_t flowid, struct nhop6_basic *pnh6) { RIB_RLOCK_TRACKER; struct rib_head *rh; struct radix_node *rn; struct sockaddr_in6 sin6; struct rtentry *rte; KASSERT((fibnum < rt_numfibs), ("fib6_lookup_nh_basic: bad fibnum")); rh = rt_tables_get_rnh(fibnum, AF_INET6); if (rh == NULL) return (ENOENT); /* Prepare lookup key */ memset(&sin6, 0, sizeof(sin6)); sin6.sin6_addr = *dst; sin6.sin6_len = sizeof(struct sockaddr_in6); /* Assume scopeid is valid and embed it directly */ if (IN6_IS_SCOPE_LINKLOCAL(dst)) sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff); RIB_RLOCK(rh); rn = rh->rnh_matchaddr((void *)&sin6, &rh->head); if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { rte = RNTORT(rn); /* Ensure route & ifp is UP */ if (RT_LINK_IS_UP(rte->rt_ifp)) { fib6_rte_to_nh_basic(rte, &sin6.sin6_addr, flags, pnh6); RIB_RUNLOCK(rh); return (0); } } RIB_RUNLOCK(rh); return (ENOENT); } /* * Performs IPv6 route table lookup on @dst. Returns 0 on success. * Stores extended nexthop info into provided @pnh6 structure. * Note that * - nh_ifp cannot be safely dereferenced unless NHR_REF is specified. * - in that case you need to call fib6_free_nh_ext() * - nh_ifp represents logical transmit interface (rt_ifp) by default * - nh_ifp represents "address" interface if NHR_IFAIF flag is passed * - mtu from logical transmit interface will be returned. * - scope will be embedded in nh_addr */ int fib6_lookup_nh_ext(uint32_t fibnum, const struct in6_addr *dst,uint32_t scopeid, uint32_t flags, uint32_t flowid, struct nhop6_extended *pnh6) { RIB_RLOCK_TRACKER; struct rib_head *rh; struct radix_node *rn; struct sockaddr_in6 sin6; struct rtentry *rte; KASSERT((fibnum < rt_numfibs), ("fib6_lookup_nh_ext: bad fibnum")); rh = rt_tables_get_rnh(fibnum, AF_INET6); if (rh == NULL) return (ENOENT); /* Prepare lookup key */ memset(&sin6, 0, sizeof(sin6)); sin6.sin6_len = sizeof(struct sockaddr_in6); sin6.sin6_addr = *dst; /* Assume scopeid is valid and embed it directly */ if (IN6_IS_SCOPE_LINKLOCAL(dst)) sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff); RIB_RLOCK(rh); rn = rh->rnh_matchaddr((void *)&sin6, &rh->head); if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { rte = RNTORT(rn); #ifdef RADIX_MPATH rte = rt_mpath_select(rte, flowid); if (rte == NULL) { RIB_RUNLOCK(rh); return (ENOENT); } #endif /* Ensure route & ifp is UP */ if (RT_LINK_IS_UP(rte->rt_ifp)) { fib6_rte_to_nh_extended(rte, &sin6.sin6_addr, flags, pnh6); if ((flags & NHR_REF) != 0) { /* TODO: Do lwref on egress ifp's */ } RIB_RUNLOCK(rh); return (0); } } RIB_RUNLOCK(rh); return (ENOENT); } void fib6_free_nh_ext(uint32_t fibnum, struct nhop6_extended *pnh6) { } #endif diff --git a/sys/netinet6/in6_fib.h b/sys/netinet6/in6_fib.h index 53f35a846035..fa07a5ce9a3e 100644 --- a/sys/netinet6/in6_fib.h +++ b/sys/netinet6/in6_fib.h @@ -1,61 +1,62 @@ /*- * Copyright (c) 2015 * Alexander V. Chernikov * * 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. * * $FreeBSD$ */ #ifndef _NETINET6_IN6_FIB_H_ #define _NETINET6_IN6_FIB_H_ /* Basic nexthop info used for uRPF/mtu checks */ struct nhop6_basic { struct ifnet *nh_ifp; /* Logical egress interface */ uint16_t nh_mtu; /* nexthop mtu */ uint16_t nh_flags; /* nhop flags */ uint8_t spare[4]; struct in6_addr nh_addr; /* GW/DST IPv4 address */ }; -/* Does not differ from nhop6_basic */ +/* Extended nexthop info used for control protocols. */ struct nhop6_extended { struct ifnet *nh_ifp; /* Logical egress interface */ + struct in6_ifaddr *nh_ia; /* Associated address. */ uint16_t nh_mtu; /* nexthop mtu */ uint16_t nh_flags; /* nhop flags */ uint8_t spare[4]; struct in6_addr nh_addr; /* GW/DST IPv6 address */ - uint64_t spare2[2]; + uint64_t spare2[1]; }; int fib6_lookup_nh_basic(uint32_t fibnum, const struct in6_addr *dst, uint32_t scopeid, uint32_t flags, uint32_t flowid,struct nhop6_basic *pnh6); int fib6_lookup_nh_ext(uint32_t fibnum, const struct in6_addr *dst, uint32_t scopeid, uint32_t flags, uint32_t flowid, struct nhop6_extended *pnh6); void fib6_free_nh_ext(uint32_t fibnum, struct nhop6_extended *pnh6); #endif