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head/sys/netinet6/ip6_output.c
| Show First 20 Lines • Show All 565 Lines • ▼ Show 20 Lines | if ((flags & IPV6_FORWARDING) == 0) { | ||||
| /* XXX: the FORWARDING flag can be set for mrouting. */ | /* XXX: the FORWARDING flag can be set for mrouting. */ | ||||
| in6_ifstat_inc(ifp, ifs6_out_request); | in6_ifstat_inc(ifp, ifs6_out_request); | ||||
| } | } | ||||
| if (rt != NULL) { | if (rt != NULL) { | ||||
| ia = (struct in6_ifaddr *)(rt->rt_ifa); | ia = (struct in6_ifaddr *)(rt->rt_ifa); | ||||
| counter_u64_add(rt->rt_pksent, 1); | counter_u64_add(rt->rt_pksent, 1); | ||||
| } | } | ||||
| /* Setup data structures for scope ID checks. */ | |||||
| /* | |||||
| * The outgoing interface must be in the zone of source and | |||||
| * destination addresses. | |||||
| */ | |||||
| origifp = ifp; | |||||
| src0 = ip6->ip6_src; | src0 = ip6->ip6_src; | ||||
| if (in6_setscope(&src0, origifp, &zone)) | |||||
| goto badscope; | |||||
| bzero(&src_sa, sizeof(src_sa)); | bzero(&src_sa, sizeof(src_sa)); | ||||
| src_sa.sin6_family = AF_INET6; | src_sa.sin6_family = AF_INET6; | ||||
| src_sa.sin6_len = sizeof(src_sa); | src_sa.sin6_len = sizeof(src_sa); | ||||
| src_sa.sin6_addr = ip6->ip6_src; | src_sa.sin6_addr = ip6->ip6_src; | ||||
| if (sa6_recoverscope(&src_sa) || zone != src_sa.sin6_scope_id) | |||||
| goto badscope; | |||||
| dst0 = ip6->ip6_dst; | dst0 = ip6->ip6_dst; | ||||
| if (in6_setscope(&dst0, origifp, &zone)) | |||||
| goto badscope; | |||||
| /* re-initialize to be sure */ | /* re-initialize to be sure */ | ||||
| bzero(&dst_sa, sizeof(dst_sa)); | bzero(&dst_sa, sizeof(dst_sa)); | ||||
| dst_sa.sin6_family = AF_INET6; | dst_sa.sin6_family = AF_INET6; | ||||
| dst_sa.sin6_len = sizeof(dst_sa); | dst_sa.sin6_len = sizeof(dst_sa); | ||||
| dst_sa.sin6_addr = ip6->ip6_dst; | dst_sa.sin6_addr = ip6->ip6_dst; | ||||
| if (sa6_recoverscope(&dst_sa) || zone != dst_sa.sin6_scope_id) { | |||||
| goto badscope; | |||||
| } | |||||
| /* We should use ia_ifp to support the case of | /* Check for valid scope ID. */ | ||||
| * sending packets to an address of our own. | if (in6_setscope(&src0, ifp, &zone) == 0 && | ||||
| sa6_recoverscope(&src_sa) == 0 && zone == src_sa.sin6_scope_id && | |||||
| in6_setscope(&dst0, ifp, &zone) == 0 && | |||||
| sa6_recoverscope(&dst_sa) == 0 && zone == dst_sa.sin6_scope_id) { | |||||
| /* | |||||
| * The outgoing interface is in the zone of the source | |||||
| * and destination addresses. | |||||
| * | |||||
| * Because the loopback interface cannot receive | |||||
| * packets with a different scope ID than its own, | |||||
| * there is a trick is to pretend the outgoing packet | |||||
| * was received by the real network interface, by | |||||
| * setting "origifp" different from "ifp". This is | |||||
| * only allowed when "ifp" is a loopback network | |||||
| * interface. Refer to code in nd6_output_ifp() for | |||||
| * more details. | |||||
| */ | */ | ||||
| origifp = ifp; | |||||
| /* | |||||
| * We should use ia_ifp to support the case of sending | |||||
| * packets to an address of our own. | |||||
| */ | |||||
| if (ia != NULL && ia->ia_ifp) | if (ia != NULL && ia->ia_ifp) | ||||
| ifp = ia->ia_ifp; | ifp = ia->ia_ifp; | ||||
| /* scope check is done. */ | } else if ((ifp->if_flags & IFF_LOOPBACK) == 0 || | ||||
| goto routefound; | sa6_recoverscope(&src_sa) != 0 || | ||||
| sa6_recoverscope(&dst_sa) != 0 || | |||||
| badscope: | dst_sa.sin6_scope_id == 0 || | ||||
| (src_sa.sin6_scope_id != 0 && | |||||
| src_sa.sin6_scope_id != dst_sa.sin6_scope_id) || | |||||
| (origifp = ifnet_byindex(dst_sa.sin6_scope_id)) == NULL) { | |||||
| /* | |||||
| * If the destination network interface is not a | |||||
| * loopback interface, or the destination network | |||||
| * address has no scope ID, or the source address has | |||||
| * a scope ID set which is different from the | |||||
| * destination address one, or there is no network | |||||
| * interface representing this scope ID, the address | |||||
| * pair is considered invalid. | |||||
| */ | |||||
| IP6STAT_INC(ip6s_badscope); | IP6STAT_INC(ip6s_badscope); | ||||
| in6_ifstat_inc(origifp, ifs6_out_discard); | in6_ifstat_inc(ifp, ifs6_out_discard); | ||||
| if (error == 0) | if (error == 0) | ||||
| error = EHOSTUNREACH; /* XXX */ | error = EHOSTUNREACH; /* XXX */ | ||||
| goto bad; | goto bad; | ||||
| } | |||||
| routefound: | /* All scope ID checks are successful. */ | ||||
| if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { | if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { | ||||
| if (opt && opt->ip6po_nextroute.ro_rt) { | if (opt && opt->ip6po_nextroute.ro_rt) { | ||||
| /* | /* | ||||
| * The nexthop is explicitly specified by the | * The nexthop is explicitly specified by the | ||||
| * application. We assume the next hop is an IPv6 | * application. We assume the next hop is an IPv6 | ||||
| * address. | * address. | ||||
| */ | */ | ||||
| dst = (struct sockaddr_in6 *)opt->ip6po_nexthop; | dst = (struct sockaddr_in6 *)opt->ip6po_nexthop; | ||||
| ▲ Show 20 Lines • Show All 2,491 Lines • Show Last 20 Lines | |||||