/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright (c) 1990 Mentat Inc. */ /* * This file contains the interface control functions for IPv6. */ #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 static in6_addr_t ipv6_ll_template = {(uint32_t)V6_LINKLOCAL, 0x0, 0x0, 0x0}; static ipif_t * ipif_lookup_interface_v6(const in6_addr_t *if_addr, const in6_addr_t *dst, ip_stack_t *ipst); static int ipif_add_ires_v6(ipif_t *, boolean_t); /* * This function is called when an application does not specify an interface * to be used for multicast traffic. It calls ire_lookup_multi_v6() to look * for an interface route for the specified multicast group. Doing * this allows the administrator to add prefix routes for multicast to * indicate which interface to be used for multicast traffic in the above * scenario. The route could be for all multicast (ff00::/8), for a single * multicast group (a /128 route) or anything in between. If there is no * such multicast route, we just find any multicast capable interface and * return it. * * We support MULTIRT and RTF_SETSRC on the multicast routes added to the * unicast table. This is used by CGTP. */ ill_t * ill_lookup_group_v6(const in6_addr_t *group, zoneid_t zoneid, ip_stack_t *ipst, boolean_t *multirtp, in6_addr_t *setsrcp) { ill_t *ill; ill = ire_lookup_multi_ill_v6(group, zoneid, ipst, multirtp, setsrcp); if (ill != NULL) return (ill); return (ill_lookup_multicast(ipst, zoneid, B_TRUE)); } /* * Look for an ipif with the specified interface address and destination. * The destination address is used only for matching point-to-point interfaces. */ static ipif_t * ipif_lookup_interface_v6(const in6_addr_t *if_addr, const in6_addr_t *dst, ip_stack_t *ipst) { ipif_t *ipif; ill_t *ill; ill_walk_context_t ctx; /* * First match all the point-to-point interfaces * before looking at non-point-to-point interfaces. * This is done to avoid returning non-point-to-point * ipif instead of unnumbered point-to-point ipif. */ rw_enter(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { mutex_enter(&ill->ill_lock); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { /* Allow the ipif to be down */ if ((ipif->ipif_flags & IPIF_POINTOPOINT) && (IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6lcl_addr, if_addr)) && (IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6pp_dst_addr, dst))) { if (!IPIF_IS_CONDEMNED(ipif)) { ipif_refhold_locked(ipif); mutex_exit(&ill->ill_lock); rw_exit(&ipst->ips_ill_g_lock); return (ipif); } } } mutex_exit(&ill->ill_lock); } rw_exit(&ipst->ips_ill_g_lock); /* lookup the ipif based on interface address */ ipif = ipif_lookup_addr_v6(if_addr, NULL, ALL_ZONES, ipst); ASSERT(ipif == NULL || ipif->ipif_isv6); return (ipif); } /* * Common function for ipif_lookup_addr_v6() and ipif_lookup_addr_exact_v6(). */ static ipif_t * ipif_lookup_addr_common_v6(const in6_addr_t *addr, ill_t *match_ill, uint32_t match_flags, zoneid_t zoneid, ip_stack_t *ipst) { ipif_t *ipif; ill_t *ill; boolean_t ptp = B_FALSE; ill_walk_context_t ctx; boolean_t match_illgrp = (match_flags & IPIF_MATCH_ILLGRP); boolean_t no_duplicate = (match_flags & IPIF_MATCH_NONDUP); rw_enter(&ipst->ips_ill_g_lock, RW_READER); /* * Repeat twice, first based on local addresses and * next time for pointopoint. */ repeat: ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { if (match_ill != NULL && ill != match_ill && (!match_illgrp || !IS_IN_SAME_ILLGRP(ill, match_ill))) { continue; } mutex_enter(&ill->ill_lock); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (zoneid != ALL_ZONES && ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES) continue; if (no_duplicate && !(ipif->ipif_flags & IPIF_UP)) { continue; } /* Allow the ipif to be down */ if ((!ptp && (IN6_ARE_ADDR_EQUAL( &ipif->ipif_v6lcl_addr, addr) && (ipif->ipif_flags & IPIF_UNNUMBERED) == 0)) || (ptp && (ipif->ipif_flags & IPIF_POINTOPOINT) && IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6pp_dst_addr, addr))) { if (!IPIF_IS_CONDEMNED(ipif)) { ipif_refhold_locked(ipif); mutex_exit(&ill->ill_lock); rw_exit(&ipst->ips_ill_g_lock); return (ipif); } } } mutex_exit(&ill->ill_lock); } /* If we already did the ptp case, then we are done */ if (ptp) { rw_exit(&ipst->ips_ill_g_lock); return (NULL); } ptp = B_TRUE; goto repeat; } /* * Lookup an ipif with the specified address. For point-to-point links we * look for matches on either the destination address or the local address, * but we skip the local address check if IPIF_UNNUMBERED is set. If the * `match_ill' argument is non-NULL, the lookup is restricted to that ill * (or illgrp if `match_ill' is in an IPMP group). */ ipif_t * ipif_lookup_addr_v6(const in6_addr_t *addr, ill_t *match_ill, zoneid_t zoneid, ip_stack_t *ipst) { return (ipif_lookup_addr_common_v6(addr, match_ill, IPIF_MATCH_ILLGRP, zoneid, ipst)); } /* * Lookup an ipif with the specified address. Similar to ipif_lookup_addr, * except that we will only return an address if it is not marked as * IPIF_DUPLICATE */ ipif_t * ipif_lookup_addr_nondup_v6(const in6_addr_t *addr, ill_t *match_ill, zoneid_t zoneid, ip_stack_t *ipst) { return (ipif_lookup_addr_common_v6(addr, match_ill, (IPIF_MATCH_ILLGRP | IPIF_MATCH_NONDUP), zoneid, ipst)); } /* * Special abbreviated version of ipif_lookup_addr_v6() that doesn't match * `match_ill' across the IPMP group. This function is only needed in some * corner-cases; almost everything should use ipif_lookup_addr_v6(). */ ipif_t * ipif_lookup_addr_exact_v6(const in6_addr_t *addr, ill_t *match_ill, ip_stack_t *ipst) { ASSERT(match_ill != NULL); return (ipif_lookup_addr_common_v6(addr, match_ill, 0, ALL_ZONES, ipst)); } /* * Look for an ipif with the specified address. For point-point links * we look for matches on either the destination address and the local * address, but we ignore the check on the local address if IPIF_UNNUMBERED * is set. * If the `match_ill' argument is non-NULL, the lookup is restricted to that * ill (or illgrp if `match_ill' is in an IPMP group). * Return the zoneid for the ipif. ALL_ZONES if none found. */ zoneid_t ipif_lookup_addr_zoneid_v6(const in6_addr_t *addr, ill_t *match_ill, ip_stack_t *ipst) { ipif_t *ipif; ill_t *ill; boolean_t ptp = B_FALSE; ill_walk_context_t ctx; zoneid_t zoneid; rw_enter(&ipst->ips_ill_g_lock, RW_READER); /* * Repeat twice, first based on local addresses and * next time for pointopoint. */ repeat: ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { if (match_ill != NULL && ill != match_ill && !IS_IN_SAME_ILLGRP(ill, match_ill)) { continue; } mutex_enter(&ill->ill_lock); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { /* Allow the ipif to be down */ if ((!ptp && (IN6_ARE_ADDR_EQUAL( &ipif->ipif_v6lcl_addr, addr) && (ipif->ipif_flags & IPIF_UNNUMBERED) == 0)) || (ptp && (ipif->ipif_flags & IPIF_POINTOPOINT) && IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6pp_dst_addr, addr)) && !(ipif->ipif_state_flags & IPIF_CONDEMNED)) { zoneid = ipif->ipif_zoneid; mutex_exit(&ill->ill_lock); rw_exit(&ipst->ips_ill_g_lock); /* * If ipif_zoneid was ALL_ZONES then we have * a trusted extensions shared IP address. * In that case GLOBAL_ZONEID works to send. */ if (zoneid == ALL_ZONES) zoneid = GLOBAL_ZONEID; return (zoneid); } } mutex_exit(&ill->ill_lock); } /* If we already did the ptp case, then we are done */ if (ptp) { rw_exit(&ipst->ips_ill_g_lock); return (ALL_ZONES); } ptp = B_TRUE; goto repeat; } /* * Perform various checks to verify that an address would make sense as a local * interface address. This is currently only called when an attempt is made * to set a local address. * * Does not allow a v4-mapped address, an address that equals the subnet * anycast address, ... a multicast address, ... */ boolean_t ip_local_addr_ok_v6(const in6_addr_t *addr, const in6_addr_t *subnet_mask) { in6_addr_t subnet; if (IN6_IS_ADDR_UNSPECIFIED(addr)) return (B_TRUE); /* Allow all zeros */ /* * Don't allow all zeroes or host part, but allow * all ones netmask. */ V6_MASK_COPY(*addr, *subnet_mask, subnet); if (IN6_IS_ADDR_V4MAPPED(addr) || (IN6_ARE_ADDR_EQUAL(addr, &subnet) && !IN6_ARE_ADDR_EQUAL(subnet_mask, &ipv6_all_ones)) || (IN6_IS_ADDR_V4COMPAT(addr) && CLASSD(V4_PART_OF_V6((*addr)))) || IN6_IS_ADDR_MULTICAST(addr)) return (B_FALSE); return (B_TRUE); } /* * Perform various checks to verify that an address would make sense as a * remote/subnet interface address. */ boolean_t ip_remote_addr_ok_v6(const in6_addr_t *addr, const in6_addr_t *subnet_mask) { in6_addr_t subnet; if (IN6_IS_ADDR_UNSPECIFIED(addr)) return (B_TRUE); /* Allow all zeros */ V6_MASK_COPY(*addr, *subnet_mask, subnet); if (IN6_IS_ADDR_V4MAPPED(addr) || (IN6_ARE_ADDR_EQUAL(addr, &subnet) && !IN6_ARE_ADDR_EQUAL(subnet_mask, &ipv6_all_ones)) || IN6_IS_ADDR_MULTICAST(addr) || (IN6_IS_ADDR_V4COMPAT(addr) && CLASSD(V4_PART_OF_V6((*addr))))) return (B_FALSE); return (B_TRUE); } /* * ip_rt_add_v6 is called to add an IPv6 route to the forwarding table. * ill is passed in to associate it with the correct interface * (for link-local destinations and gateways). * If ire_arg is set, then we return the held IRE in that location. */ /* ARGSUSED1 */ int ip_rt_add_v6(const in6_addr_t *dst_addr, const in6_addr_t *mask, const in6_addr_t *gw_addr, const in6_addr_t *src_addr, int flags, ill_t *ill, ire_t **ire_arg, struct rtsa_s *sp, ip_stack_t *ipst, zoneid_t zoneid) { ire_t *ire, *nire; ire_t *gw_ire = NULL; ipif_t *ipif; uint_t type; int match_flags = MATCH_IRE_TYPE; tsol_gc_t *gc = NULL; tsol_gcgrp_t *gcgrp = NULL; boolean_t gcgrp_xtraref = B_FALSE; if (ire_arg != NULL) *ire_arg = NULL; /* * Prevent routes with a zero gateway from being created (since * interfaces can currently be plumbed and brought up with no assigned * address). */ if (IN6_IS_ADDR_UNSPECIFIED(gw_addr)) return (ENETUNREACH); /* * If this is the case of RTF_HOST being set, then we set the netmask * to all ones (regardless if one was supplied). */ if (flags & RTF_HOST) mask = &ipv6_all_ones; /* * Get the ipif, if any, corresponding to the gw_addr * If -ifp was specified we restrict ourselves to the ill, otherwise * we match on the gatway and destination to handle unnumbered pt-pt * interfaces. */ if (ill != NULL) ipif = ipif_lookup_addr_v6(gw_addr, ill, ALL_ZONES, ipst); else ipif = ipif_lookup_interface_v6(gw_addr, dst_addr, ipst); if (ipif != NULL) { if (IS_VNI(ipif->ipif_ill)) { ipif_refrele(ipif); return (EINVAL); } } /* * GateD will attempt to create routes with a loopback interface * address as the gateway and with RTF_GATEWAY set. We allow * these routes to be added, but create them as interface routes * since the gateway is an interface address. */ if ((ipif != NULL) && (ipif->ipif_ire_type == IRE_LOOPBACK)) { flags &= ~RTF_GATEWAY; if (IN6_ARE_ADDR_EQUAL(gw_addr, &ipv6_loopback) && IN6_ARE_ADDR_EQUAL(dst_addr, &ipv6_loopback) && IN6_ARE_ADDR_EQUAL(mask, &ipv6_all_ones)) { ire = ire_ftable_lookup_v6(dst_addr, 0, 0, IRE_LOOPBACK, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE, 0, ipst, NULL); if (ire != NULL) { ire_refrele(ire); ipif_refrele(ipif); return (EEXIST); } ip1dbg(("ip_rt_add_v6: 0x%p creating IRE 0x%x" "for 0x%x\n", (void *)ipif, ipif->ipif_ire_type, ntohl(ipif->ipif_lcl_addr))); ire = ire_create_v6( dst_addr, mask, NULL, ipif->ipif_ire_type, /* LOOPBACK */ ipif->ipif_ill, zoneid, (ipif->ipif_flags & IPIF_PRIVATE) ? RTF_PRIVATE : 0, NULL, ipst); if (ire == NULL) { ipif_refrele(ipif); return (ENOMEM); } /* src address assigned by the caller? */ if ((flags & RTF_SETSRC) && !IN6_IS_ADDR_UNSPECIFIED(src_addr)) ire->ire_setsrc_addr_v6 = *src_addr; nire = ire_add(ire); if (nire == NULL) { /* * In the result of failure, ire_add() will have * already deleted the ire in question, so there * is no need to do that here. */ ipif_refrele(ipif); return (ENOMEM); } /* * Check if it was a duplicate entry. This handles * the case of two racing route adds for the same route */ if (nire != ire) { ASSERT(nire->ire_identical_ref > 1); ire_delete(nire); ire_refrele(nire); ipif_refrele(ipif); return (EEXIST); } ire = nire; goto save_ire; } } /* * The routes for multicast with CGTP are quite special in that * the gateway is the local interface address, yet RTF_GATEWAY * is set. We turn off RTF_GATEWAY to provide compatibility with * this undocumented and unusual use of multicast routes. */ if ((flags & RTF_MULTIRT) && ipif != NULL) flags &= ~RTF_GATEWAY; /* * Traditionally, interface routes are ones where RTF_GATEWAY isn't set * and the gateway address provided is one of the system's interface * addresses. By using the routing socket interface and supplying an * RTA_IFP sockaddr with an interface index, an alternate method of * specifying an interface route to be created is available which uses * the interface index that specifies the outgoing interface rather than * the address of an outgoing interface (which may not be able to * uniquely identify an interface). When coupled with the RTF_GATEWAY * flag, routes can be specified which not only specify the next-hop to * be used when routing to a certain prefix, but also which outgoing * interface should be used. * * Previously, interfaces would have unique addresses assigned to them * and so the address assigned to a particular interface could be used * to identify a particular interface. One exception to this was the * case of an unnumbered interface (where IPIF_UNNUMBERED was set). * * With the advent of IPv6 and its link-local addresses, this * restriction was relaxed and interfaces could share addresses between * themselves. In fact, typically all of the link-local interfaces on * an IPv6 node or router will have the same link-local address. In * order to differentiate between these interfaces, the use of an * interface index is necessary and this index can be carried inside a * RTA_IFP sockaddr (which is actually a sockaddr_dl). One restriction * of using the interface index, however, is that all of the ipif's that * are part of an ill have the same index and so the RTA_IFP sockaddr * cannot be used to differentiate between ipif's (or logical * interfaces) that belong to the same ill (physical interface). * * For example, in the following case involving IPv4 interfaces and * logical interfaces * * 192.0.2.32 255.255.255.224 192.0.2.33 U if0 * 192.0.2.32 255.255.255.224 192.0.2.34 U if0 * 192.0.2.32 255.255.255.224 192.0.2.35 U if0 * * the ipif's corresponding to each of these interface routes can be * uniquely identified by the "gateway" (actually interface address). * * In this case involving multiple IPv6 default routes to a particular * link-local gateway, the use of RTA_IFP is necessary to specify which * default route is of interest: * * default fe80::123:4567:89ab:cdef U if0 * default fe80::123:4567:89ab:cdef U if1 */ /* RTF_GATEWAY not set */ if (!(flags & RTF_GATEWAY)) { if (sp != NULL) { ip2dbg(("ip_rt_add_v6: gateway security attributes " "cannot be set with interface route\n")); if (ipif != NULL) ipif_refrele(ipif); return (EINVAL); } /* * Whether or not ill (RTA_IFP) is set, we require that * the gateway is one of our local addresses. */ if (ipif == NULL) return (ENETUNREACH); /* * We use MATCH_IRE_ILL here. If the caller specified an * interface (from the RTA_IFP sockaddr) we use it, otherwise * we use the ill derived from the gateway address. * We can always match the gateway address since we record it * in ire_gateway_addr. * We don't allow RTA_IFP to specify a different ill than the * one matching the ipif to make sure we can delete the route. */ match_flags |= MATCH_IRE_GW | MATCH_IRE_ILL; if (ill == NULL) { ill = ipif->ipif_ill; } else if (ill != ipif->ipif_ill) { ipif_refrele(ipif); return (EINVAL); } /* * We check for an existing entry at this point. */ match_flags |= MATCH_IRE_MASK; ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, IRE_INTERFACE, ill, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); if (ire != NULL) { ire_refrele(ire); ipif_refrele(ipif); return (EEXIST); } /* * Create a copy of the IRE_LOOPBACK, IRE_IF_NORESOLVER or * IRE_IF_RESOLVER with the modified address, netmask, and * gateway. */ ire = ire_create_v6( dst_addr, mask, gw_addr, ill->ill_net_type, ill, zoneid, flags, NULL, ipst); if (ire == NULL) { ipif_refrele(ipif); return (ENOMEM); } /* * Some software (for example, GateD and Sun Cluster) attempts * to create (what amount to) IRE_PREFIX routes with the * loopback address as the gateway. This is primarily done to * set up prefixes with the RTF_REJECT flag set (for example, * when generating aggregate routes). We also OR in the * RTF_BLACKHOLE flag as these interface routes, by * definition, can only be that. * * If the IRE type (as defined by ill->ill_net_type) is * IRE_LOOPBACK, then we map the request into a * IRE_IF_NORESOLVER. * * Needless to say, the real IRE_LOOPBACK is NOT created by this * routine, but rather using ire_create_v6() directly. */ if (ill->ill_net_type == IRE_LOOPBACK) { ire->ire_type = IRE_IF_NORESOLVER; ire->ire_flags |= RTF_BLACKHOLE; } /* src address assigned by the caller? */ if ((flags & RTF_SETSRC) && !IN6_IS_ADDR_UNSPECIFIED(src_addr)) ire->ire_setsrc_addr_v6 = *src_addr; nire = ire_add(ire); if (nire == NULL) { /* * In the result of failure, ire_add() will have * already deleted the ire in question, so there * is no need to do that here. */ ipif_refrele(ipif); return (ENOMEM); } /* * Check if it was a duplicate entry. This handles * the case of two racing route adds for the same route */ if (nire != ire) { ASSERT(nire->ire_identical_ref > 1); ire_delete(nire); ire_refrele(nire); ipif_refrele(ipif); return (EEXIST); } ire = nire; goto save_ire; } /* * Get an interface IRE for the specified gateway. * If we don't have an IRE_IF_NORESOLVER or IRE_IF_RESOLVER for the * gateway, it is currently unreachable and we fail the request * accordingly. We reject any RTF_GATEWAY routes where the gateway * is an IRE_LOCAL or IRE_LOOPBACK. * If RTA_IFP was specified we look on that particular ill. */ if (ill != NULL) match_flags |= MATCH_IRE_ILL; /* Check whether the gateway is reachable. */ again: type = IRE_INTERFACE | IRE_LOCAL | IRE_LOOPBACK; if (flags & RTF_INDIRECT) type |= IRE_OFFLINK; gw_ire = ire_ftable_lookup_v6(gw_addr, 0, 0, type, ill, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); if (gw_ire == NULL) { /* * With IPMP, we allow host routes to influence in.mpathd's * target selection. However, if the test addresses are on * their own network, the above lookup will fail since the * underlying IRE_INTERFACEs are marked hidden. So allow * hidden test IREs to be found and try again. */ if (!(match_flags & MATCH_IRE_TESTHIDDEN)) { match_flags |= MATCH_IRE_TESTHIDDEN; goto again; } if (ipif != NULL) ipif_refrele(ipif); return (ENETUNREACH); } if (gw_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) { ire_refrele(gw_ire); if (ipif != NULL) ipif_refrele(ipif); return (ENETUNREACH); } /* * We create one of three types of IREs as a result of this request * based on the netmask. A netmask of all ones (which is automatically * assumed when RTF_HOST is set) results in an IRE_HOST being created. * An all zeroes netmask implies a default route so an IRE_DEFAULT is * created. Otherwise, an IRE_PREFIX route is created for the * destination prefix. */ if (IN6_ARE_ADDR_EQUAL(mask, &ipv6_all_ones)) type = IRE_HOST; else if (IN6_IS_ADDR_UNSPECIFIED(mask)) type = IRE_DEFAULT; else type = IRE_PREFIX; /* check for a duplicate entry */ ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, type, ill, ALL_ZONES, NULL, match_flags | MATCH_IRE_MASK | MATCH_IRE_GW, 0, ipst, NULL); if (ire != NULL) { if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); ire_refrele(ire); return (EEXIST); } /* Security attribute exists */ if (sp != NULL) { tsol_gcgrp_addr_t ga; /* find or create the gateway credentials group */ ga.ga_af = AF_INET6; ga.ga_addr = *gw_addr; /* we hold reference to it upon success */ gcgrp = gcgrp_lookup(&ga, B_TRUE); if (gcgrp == NULL) { if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); return (ENOMEM); } /* * Create and add the security attribute to the group; a * reference to the group is made upon allocating a new * entry successfully. If it finds an already-existing * entry for the security attribute in the group, it simply * returns it and no new reference is made to the group. */ gc = gc_create(sp, gcgrp, &gcgrp_xtraref); if (gc == NULL) { /* release reference held by gcgrp_lookup */ GCGRP_REFRELE(gcgrp); if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); return (ENOMEM); } } /* Create the IRE. */ ire = ire_create_v6( dst_addr, /* dest address */ mask, /* mask */ gw_addr, /* gateway address */ (ushort_t)type, /* IRE type */ ill, zoneid, flags, gc, /* security attribute */ ipst); /* * The ire holds a reference to the 'gc' and the 'gc' holds a * reference to the 'gcgrp'. We can now release the extra reference * the 'gcgrp' acquired in the gcgrp_lookup, if it was not used. */ if (gcgrp_xtraref) GCGRP_REFRELE(gcgrp); if (ire == NULL) { if (gc != NULL) GC_REFRELE(gc); if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); return (ENOMEM); } /* src address assigned by the caller? */ if ((flags & RTF_SETSRC) && !IN6_IS_ADDR_UNSPECIFIED(src_addr)) ire->ire_setsrc_addr_v6 = *src_addr; /* * POLICY: should we allow an RTF_HOST with address INADDR_ANY? * SUN/OS socket stuff does but do we really want to allow ::0 ? */ /* Add the new IRE. */ nire = ire_add(ire); if (nire == NULL) { /* * In the result of failure, ire_add() will have * already deleted the ire in question, so there * is no need to do that here. */ if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); return (ENOMEM); } /* * Check if it was a duplicate entry. This handles * the case of two racing route adds for the same route */ if (nire != ire) { ASSERT(nire->ire_identical_ref > 1); ire_delete(nire); ire_refrele(nire); if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); return (EEXIST); } ire = nire; if (flags & RTF_MULTIRT) { /* * Invoke the CGTP (multirouting) filtering module * to add the dst address in the filtering database. * Replicated inbound packets coming from that address * will be filtered to discard the duplicates. * It is not necessary to call the CGTP filter hook * when the dst address is a multicast, because an * IP source address cannot be a multicast. */ if (ipst->ips_ip_cgtp_filter_ops != NULL && !IN6_IS_ADDR_MULTICAST(&(ire->ire_addr_v6))) { int res; ipif_t *src_ipif; /* Find the source address corresponding to gw_ire */ src_ipif = ipif_lookup_addr_v6( &gw_ire->ire_gateway_addr_v6, NULL, zoneid, ipst); if (src_ipif != NULL) { res = ipst->ips_ip_cgtp_filter_ops-> cfo_add_dest_v6( ipst->ips_netstack->netstack_stackid, &ire->ire_addr_v6, &ire->ire_gateway_addr_v6, &ire->ire_setsrc_addr_v6, &src_ipif->ipif_v6lcl_addr); ipif_refrele(src_ipif); } else { res = EADDRNOTAVAIL; } if (res != 0) { if (ipif != NULL) ipif_refrele(ipif); ire_refrele(gw_ire); ire_delete(ire); ire_refrele(ire); /* Held in ire_add */ return (res); } } } save_ire: if (gw_ire != NULL) { ire_refrele(gw_ire); gw_ire = NULL; } if (ire->ire_ill != NULL) { /* * Save enough information so that we can recreate the IRE if * the ILL goes down and then up. The metrics associated * with the route will be saved as well when rts_setmetrics() is * called after the IRE has been created. In the case where * memory cannot be allocated, none of this information will be * saved. */ ill_save_ire(ire->ire_ill, ire); } if (ire_arg != NULL) { /* * Store the ire that was successfully added into where ire_arg * points to so that callers don't have to look it up * themselves (but they are responsible for ire_refrele()ing * the ire when they are finished with it). */ *ire_arg = ire; } else { ire_refrele(ire); /* Held in ire_add */ } if (ipif != NULL) ipif_refrele(ipif); return (0); } /* * ip_rt_delete_v6 is called to delete an IPv6 route. * ill is passed in to associate it with the correct interface. * (for link-local destinations and gateways). */ /* ARGSUSED4 */ int ip_rt_delete_v6(const in6_addr_t *dst_addr, const in6_addr_t *mask, const in6_addr_t *gw_addr, uint_t rtm_addrs, int flags, ill_t *ill, ip_stack_t *ipst, zoneid_t zoneid) { ire_t *ire = NULL; ipif_t *ipif; uint_t type; uint_t match_flags = MATCH_IRE_TYPE; int err = 0; /* * If this is the case of RTF_HOST being set, then we set the netmask * to all ones. Otherwise, we use the netmask if one was supplied. */ if (flags & RTF_HOST) { mask = &ipv6_all_ones; match_flags |= MATCH_IRE_MASK; } else if (rtm_addrs & RTA_NETMASK) { match_flags |= MATCH_IRE_MASK; } /* * Note that RTF_GATEWAY is never set on a delete, therefore * we check if the gateway address is one of our interfaces first, * and fall back on RTF_GATEWAY routes. * * This makes it possible to delete an original * IRE_IF_NORESOLVER/IRE_IF_RESOLVER - consistent with SunOS 4.1. * However, we have RTF_KERNEL set on the ones created by ipif_up * and those can not be deleted here. * * We use MATCH_IRE_ILL if we know the interface. If the caller * specified an interface (from the RTA_IFP sockaddr) we use it, * otherwise we use the ill derived from the gateway address. * We can always match the gateway address since we record it * in ire_gateway_addr. * * For more detail on specifying routes by gateway address and by * interface index, see the comments in ip_rt_add_v6(). */ ipif = ipif_lookup_interface_v6(gw_addr, dst_addr, ipst); if (ipif != NULL) { ill_t *ill_match; if (ill != NULL) ill_match = ill; else ill_match = ipif->ipif_ill; match_flags |= MATCH_IRE_ILL; if (ipif->ipif_ire_type == IRE_LOOPBACK) { ire = ire_ftable_lookup_v6(dst_addr, 0, 0, IRE_LOOPBACK, ill_match, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); } if (ire == NULL) { match_flags |= MATCH_IRE_GW; ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, IRE_INTERFACE, ill_match, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); } /* Avoid deleting routes created by kernel from an ipif */ if (ire != NULL && (ire->ire_flags & RTF_KERNEL)) { ire_refrele(ire); ire = NULL; } /* Restore in case we didn't find a match */ match_flags &= ~(MATCH_IRE_GW|MATCH_IRE_ILL); } if (ire == NULL) { /* * At this point, the gateway address is not one of our own * addresses or a matching interface route was not found. We * set the IRE type to lookup based on whether * this is a host route, a default route or just a prefix. * * If an ill was passed in, then the lookup is based on an * interface index so MATCH_IRE_ILL is added to match_flags. */ match_flags |= MATCH_IRE_GW; if (ill != NULL) match_flags |= MATCH_IRE_ILL; if (IN6_ARE_ADDR_EQUAL(mask, &ipv6_all_ones)) type = IRE_HOST; else if (IN6_IS_ADDR_UNSPECIFIED(mask)) type = IRE_DEFAULT; else type = IRE_PREFIX; ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, type, ill, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); } if (ipif != NULL) { ipif_refrele(ipif); ipif = NULL; } if (ire == NULL) return (ESRCH); if (ire->ire_flags & RTF_MULTIRT) { /* * Invoke the CGTP (multirouting) filtering module * to remove the dst address from the filtering database. * Packets coming from that address will no longer be * filtered to remove duplicates. */ if (ipst->ips_ip_cgtp_filter_ops != NULL) { err = ipst->ips_ip_cgtp_filter_ops->cfo_del_dest_v6( ipst->ips_netstack->netstack_stackid, &ire->ire_addr_v6, &ire->ire_gateway_addr_v6); } } ill = ire->ire_ill; if (ill != NULL) ill_remove_saved_ire(ill, ire); ire_delete(ire); ire_refrele(ire); return (err); } /* * Derive an interface id from the link layer address. */ void ill_setdefaulttoken(ill_t *ill) { if (!ill->ill_manual_token) { bzero(&ill->ill_token, sizeof (ill->ill_token)); MEDIA_V6INTFID(ill->ill_media, ill, &ill->ill_token); ill->ill_token_length = IPV6_TOKEN_LEN; } } void ill_setdesttoken(ill_t *ill) { bzero(&ill->ill_dest_token, sizeof (ill->ill_dest_token)); MEDIA_V6DESTINTFID(ill->ill_media, ill, &ill->ill_dest_token); } /* * Create a link-local address from a token. */ static void ipif_get_linklocal(in6_addr_t *dest, const in6_addr_t *token) { int i; for (i = 0; i < 4; i++) { dest->s6_addr32[i] = token->s6_addr32[i] | ipv6_ll_template.s6_addr32[i]; } } /* * Set a default IPv6 address for a 6to4 tunnel interface 2002:::1/16 */ static void ipif_set6to4addr(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; struct in_addr v4phys; ASSERT(ill->ill_mactype == DL_6TO4); ASSERT(ill->ill_phys_addr_length == sizeof (struct in_addr)); ASSERT(ipif->ipif_isv6); if (ipif->ipif_flags & IPIF_UP) return; (void) ip_plen_to_mask_v6(16, &ipif->ipif_v6net_mask); bcopy(ill->ill_phys_addr, &v4phys, sizeof (struct in_addr)); IN6_V4ADDR_TO_6TO4(&v4phys, &ipif->ipif_v6lcl_addr); V6_MASK_COPY(ipif->ipif_v6lcl_addr, ipif->ipif_v6net_mask, ipif->ipif_v6subnet); } /* * Is it not possible to set the link local address? * The address can be set if the token is set, and the token * isn't too long. * Return B_TRUE if the address can't be set, or B_FALSE if it can. */ boolean_t ipif_cant_setlinklocal(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; if (IN6_IS_ADDR_UNSPECIFIED(&ill->ill_token) || ill->ill_token_length > IPV6_ABITS - IPV6_LL_PREFIXLEN) return (B_TRUE); return (B_FALSE); } /* * Generate a link-local address from the token. */ void ipif_setlinklocal(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; in6_addr_t ov6addr; ASSERT(IAM_WRITER_ILL(ill)); /* * ill_manual_linklocal is set when the link-local address was * manually configured. */ if (ill->ill_manual_linklocal) return; /* * IPv6 interfaces over 6to4 tunnels are special. They do not have * link-local addresses, but instead have a single automatically * generated global address. */ if (ill->ill_mactype == DL_6TO4) { ipif_set6to4addr(ipif); return; } if (ipif_cant_setlinklocal(ipif)) return; ov6addr = ipif->ipif_v6lcl_addr; ipif_get_linklocal(&ipif->ipif_v6lcl_addr, &ill->ill_token); sctp_update_ipif_addr(ipif, ov6addr); (void) ip_plen_to_mask_v6(IPV6_LL_PREFIXLEN, &ipif->ipif_v6net_mask); if (IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6pp_dst_addr)) { V6_MASK_COPY(ipif->ipif_v6lcl_addr, ipif->ipif_v6net_mask, ipif->ipif_v6subnet); } ip_rts_newaddrmsg(RTM_CHGADDR, 0, ipif, RTSQ_DEFAULT); } /* * Generate a destination link-local address for a point-to-point IPv6 * interface with a destination interface id (IP tunnels are such interfaces) * based on the destination token. */ void ipif_setdestlinklocal(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; ASSERT(IAM_WRITER_ILL(ill)); if (ill->ill_manual_dst_linklocal) return; if (IN6_IS_ADDR_UNSPECIFIED(&ill->ill_dest_token)) return; ipif_get_linklocal(&ipif->ipif_v6pp_dst_addr, &ill->ill_dest_token); ipif->ipif_v6subnet = ipif->ipif_v6pp_dst_addr; } /* * Get the resolver set up for a new ipif. (Always called as writer.) */ int ipif_ndp_up(ipif_t *ipif, boolean_t initial) { ill_t *ill = ipif->ipif_ill; int err = 0; nce_t *nce = NULL; boolean_t added_ipif = B_FALSE; DTRACE_PROBE3(ipif__downup, char *, "ipif_ndp_up", ill_t *, ill, ipif_t *, ipif); ip1dbg(("ipif_ndp_up(%s:%u)\n", ill->ill_name, ipif->ipif_id)); if (IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6lcl_addr) || (!(ill->ill_net_type & IRE_INTERFACE))) { ipif->ipif_addr_ready = 1; return (0); } if ((ipif->ipif_flags & (IPIF_UNNUMBERED|IPIF_NOLOCAL)) == 0) { uint16_t flags; uint16_t state; uchar_t *hw_addr; ill_t *bound_ill; ipmp_illgrp_t *illg = ill->ill_grp; uint_t hw_addr_len; flags = NCE_F_MYADDR | NCE_F_NONUD | NCE_F_PUBLISH | NCE_F_AUTHORITY; if (ill->ill_flags & ILLF_ROUTER) flags |= NCE_F_ISROUTER; if (ipif->ipif_flags & IPIF_ANYCAST) flags |= NCE_F_ANYCAST; if (IS_IPMP(ill)) { ASSERT(ill->ill_net_type == IRE_IF_RESOLVER); /* * If we're here via ipif_up(), then the ipif won't be * bound yet -- add it to the group, which will bind * it if possible. (We would add it in ipif_up(), but * deleting on failure there is gruesome.) If we're * here via ipmp_ill_bind_ipif(), then the ipif has * already been added to the group and we just need to * use the binding. */ if ((bound_ill = ipmp_ipif_bound_ill(ipif)) == NULL) { bound_ill = ipmp_illgrp_add_ipif(illg, ipif); if (bound_ill == NULL) { /* * We couldn't bind the ipif to an ill * yet, so we have nothing to publish. * Set ipif_addr_ready so that this * address can be used locally for now. * The routing socket message will be * sent from ipif_up_done_v6(). */ ipif->ipif_addr_ready = 1; return (0); } added_ipif = B_TRUE; } hw_addr = bound_ill->ill_nd_lla; hw_addr_len = bound_ill->ill_phys_addr_length; } else { bound_ill = ill; hw_addr = ill->ill_nd_lla; hw_addr_len = ill->ill_phys_addr_length; } /* * If this is an initial bring-up (or the ipif was never * completely brought up), do DAD. Otherwise, we're here * because IPMP has rebound an address to this ill: send * unsolicited advertisements to inform others. */ if (initial || !ipif->ipif_addr_ready) { /* Causes Duplicate Address Detection to run */ state = ND_PROBE; } else { state = ND_REACHABLE; flags |= NCE_F_UNSOL_ADV; } retry: err = nce_lookup_then_add_v6(ill, hw_addr, hw_addr_len, &ipif->ipif_v6lcl_addr, flags, state, &nce); switch (err) { case 0: ip1dbg(("ipif_ndp_up: NCE created for %s\n", ill->ill_name)); ipif->ipif_addr_ready = 1; ipif->ipif_added_nce = 1; nce->nce_ipif_cnt++; break; case EINPROGRESS: ip1dbg(("ipif_ndp_up: running DAD now for %s\n", ill->ill_name)); ipif->ipif_added_nce = 1; nce->nce_ipif_cnt++; break; case EEXIST: ip1dbg(("ipif_ndp_up: NCE already exists for %s\n", ill->ill_name)); if (!NCE_MYADDR(nce->nce_common)) { /* * A leftover nce from before this address * existed */ ncec_delete(nce->nce_common); nce_refrele(nce); nce = NULL; goto retry; } if ((ipif->ipif_flags & IPIF_POINTOPOINT) == 0) { nce_refrele(nce); nce = NULL; ip1dbg(("ipif_ndp_up: NCE already exists " "for %s\n", ill->ill_name)); goto fail; } /* * Duplicate local addresses are permissible for * IPIF_POINTOPOINT interfaces which will get marked * IPIF_UNNUMBERED later in * ip_addr_availability_check(). * * The nce_ipif_cnt field tracks the number of * ipifs that have nce_addr as their local address. */ ipif->ipif_addr_ready = 1; ipif->ipif_added_nce = 1; nce->nce_ipif_cnt++; err = 0; break; default: ip1dbg(("ipif_ndp_up: NCE creation failed for %s\n", ill->ill_name)); goto fail; } } else { /* No local NCE for this entry */ ipif->ipif_addr_ready = 1; } if (nce != NULL) nce_refrele(nce); return (0); fail: if (added_ipif) ipmp_illgrp_del_ipif(ill->ill_grp, ipif); return (err); } /* Remove all cache entries for this logical interface */ void ipif_ndp_down(ipif_t *ipif) { ipif_nce_down(ipif); } /* * Return the scope of the given IPv6 address. If the address is an * IPv4 mapped IPv6 address, return the scope of the corresponding * IPv4 address. */ in6addr_scope_t ip_addr_scope_v6(const in6_addr_t *addr) { static in6_addr_t ipv6loopback = IN6ADDR_LOOPBACK_INIT; if (IN6_IS_ADDR_V4MAPPED(addr)) { in_addr_t v4addr_h = ntohl(V4_PART_OF_V6((*addr))); if ((v4addr_h >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET || (v4addr_h & IN_AUTOCONF_MASK) == IN_AUTOCONF_NET) return (IP6_SCOPE_LINKLOCAL); if ((v4addr_h & IN_PRIVATE8_MASK) == IN_PRIVATE8_NET || (v4addr_h & IN_PRIVATE12_MASK) == IN_PRIVATE12_NET || (v4addr_h & IN_PRIVATE16_MASK) == IN_PRIVATE16_NET) return (IP6_SCOPE_SITELOCAL); return (IP6_SCOPE_GLOBAL); } if (IN6_IS_ADDR_MULTICAST(addr)) return (IN6_ADDR_MC_SCOPE(addr)); /* link-local and loopback addresses are of link-local scope */ if (IN6_IS_ADDR_LINKLOCAL(addr) || IN6_ARE_ADDR_EQUAL(addr, &ipv6loopback)) return (IP6_SCOPE_LINKLOCAL); if (IN6_IS_ADDR_SITELOCAL(addr)) return (IP6_SCOPE_SITELOCAL); return (IP6_SCOPE_GLOBAL); } /* * Returns the length of the common prefix of a1 and a2, as per * CommonPrefixLen() defined in RFC 3484. */ static int ip_common_prefix_v6(const in6_addr_t *a1, const in6_addr_t *a2) { int i; uint32_t a1val, a2val, mask; for (i = 0; i < 4; i++) { if ((a1val = a1->s6_addr32[i]) != (a2val = a2->s6_addr32[i])) { a1val ^= a2val; i *= 32; mask = 0x80000000u; while (!(a1val & mask)) { mask >>= 1; i++; } return (i); } } return (IPV6_ABITS); } #define IPIF_VALID_IPV6_SOURCE(ipif) \ (((ipif)->ipif_flags & IPIF_UP) && \ !((ipif)->ipif_flags & (IPIF_NOLOCAL|IPIF_ANYCAST)) && \ !((ipif)->ipif_ill->ill_flags & ILLF_NOACCEPT)) /* source address candidate */ typedef struct candidate { ipif_t *cand_ipif; /* The properties of this candidate */ boolean_t cand_isdst; boolean_t cand_isdst_set; in6addr_scope_t cand_scope; boolean_t cand_scope_set; boolean_t cand_isdeprecated; boolean_t cand_isdeprecated_set; boolean_t cand_ispreferred; boolean_t cand_ispreferred_set; boolean_t cand_matchedinterface; boolean_t cand_matchedinterface_set; boolean_t cand_matchedlabel; boolean_t cand_matchedlabel_set; boolean_t cand_istmp; boolean_t cand_istmp_set; int cand_common_pref; boolean_t cand_common_pref_set; boolean_t cand_pref_eq; boolean_t cand_pref_eq_set; int cand_pref_len; boolean_t cand_pref_len_set; } cand_t; #define cand_srcaddr cand_ipif->ipif_v6lcl_addr #define cand_mask cand_ipif->ipif_v6net_mask #define cand_flags cand_ipif->ipif_flags #define cand_ill cand_ipif->ipif_ill #define cand_zoneid cand_ipif->ipif_zoneid /* information about the destination for source address selection */ typedef struct dstinfo { const in6_addr_t *dst_addr; ill_t *dst_ill; uint_t dst_restrict_ill; boolean_t dst_prefer_src_tmp; in6addr_scope_t dst_scope; char *dst_label; } dstinfo_t; /* * The following functions are rules used to select a source address in * ipif_select_source_v6(). Each rule compares a current candidate (cc) * against the best candidate (bc). Each rule has three possible outcomes; * the candidate is preferred over the best candidate (CAND_PREFER), the * candidate is not preferred over the best candidate (CAND_AVOID), or the * candidate is of equal value as the best candidate (CAND_TIE). * * These rules are part of a greater "Default Address Selection for IPv6" * sheme, which is standards based work coming out of the IETF ipv6 working * group. The IETF document defines both IPv6 source address selection and * destination address ordering. The rules defined here implement the IPv6 * source address selection. Destination address ordering is done by * libnsl, and uses a similar set of rules to implement the sorting. * * Most of the rules are defined by the RFC and are not typically altered. The * last rule, number 8, has language that allows for local preferences. In the * scheme below, this means that new Solaris rules should normally go between * rule_ifprefix and rule_prefix. */ typedef enum {CAND_AVOID, CAND_TIE, CAND_PREFER} rule_res_t; typedef rule_res_t (*rulef_t)(cand_t *, cand_t *, const dstinfo_t *, ip_stack_t *); /* Prefer an address if it is equal to the destination address. */ /* ARGSUSED3 */ static rule_res_t rule_isdst(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_isdst_set) { bc->cand_isdst = IN6_ARE_ADDR_EQUAL(&bc->cand_srcaddr, dstinfo->dst_addr); bc->cand_isdst_set = B_TRUE; } cc->cand_isdst = IN6_ARE_ADDR_EQUAL(&cc->cand_srcaddr, dstinfo->dst_addr); cc->cand_isdst_set = B_TRUE; if (cc->cand_isdst == bc->cand_isdst) return (CAND_TIE); else if (cc->cand_isdst) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer addresses that are of closest scope to the destination. Always * prefer addresses that are of greater scope than the destination over * those that are of lesser scope than the destination. */ /* ARGSUSED3 */ static rule_res_t rule_scope(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_scope_set) { bc->cand_scope = ip_addr_scope_v6(&bc->cand_srcaddr); bc->cand_scope_set = B_TRUE; } cc->cand_scope = ip_addr_scope_v6(&cc->cand_srcaddr); cc->cand_scope_set = B_TRUE; if (cc->cand_scope < bc->cand_scope) { if (cc->cand_scope < dstinfo->dst_scope) return (CAND_AVOID); else return (CAND_PREFER); } else if (bc->cand_scope < cc->cand_scope) { if (bc->cand_scope < dstinfo->dst_scope) return (CAND_PREFER); else return (CAND_AVOID); } else { return (CAND_TIE); } } /* * Prefer non-deprecated source addresses. */ /* ARGSUSED2 */ static rule_res_t rule_deprecated(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_isdeprecated_set) { bc->cand_isdeprecated = ((bc->cand_flags & IPIF_DEPRECATED) != 0); bc->cand_isdeprecated_set = B_TRUE; } cc->cand_isdeprecated = ((cc->cand_flags & IPIF_DEPRECATED) != 0); cc->cand_isdeprecated_set = B_TRUE; if (bc->cand_isdeprecated == cc->cand_isdeprecated) return (CAND_TIE); else if (cc->cand_isdeprecated) return (CAND_AVOID); else return (CAND_PREFER); } /* * Prefer source addresses that have the IPIF_PREFERRED flag set. This * rule must be before rule_interface because the flag could be set on any * interface, not just the interface being used for outgoing packets (for * example, the IFF_PREFERRED could be set on an address assigned to the * loopback interface). */ /* ARGSUSED2 */ static rule_res_t rule_preferred(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_ispreferred_set) { bc->cand_ispreferred = ((bc->cand_flags & IPIF_PREFERRED) != 0); bc->cand_ispreferred_set = B_TRUE; } cc->cand_ispreferred = ((cc->cand_flags & IPIF_PREFERRED) != 0); cc->cand_ispreferred_set = B_TRUE; if (bc->cand_ispreferred == cc->cand_ispreferred) return (CAND_TIE); else if (cc->cand_ispreferred) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer source addresses that are assigned to the outgoing interface. */ /* ARGSUSED3 */ static rule_res_t rule_interface(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { ill_t *dstill = dstinfo->dst_ill; /* * If dstinfo->dst_restrict_ill is set, this rule is unnecessary * since we know all candidates will be on the same link. */ if (dstinfo->dst_restrict_ill) return (CAND_TIE); if (!bc->cand_matchedinterface_set) { bc->cand_matchedinterface = bc->cand_ill == dstill; bc->cand_matchedinterface_set = B_TRUE; } cc->cand_matchedinterface = cc->cand_ill == dstill; cc->cand_matchedinterface_set = B_TRUE; if (bc->cand_matchedinterface == cc->cand_matchedinterface) return (CAND_TIE); else if (cc->cand_matchedinterface) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer source addresses whose label matches the destination's label. */ static rule_res_t rule_label(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { char *label; if (!bc->cand_matchedlabel_set) { label = ip6_asp_lookup(&bc->cand_srcaddr, NULL, ipst); bc->cand_matchedlabel = ip6_asp_labelcmp(label, dstinfo->dst_label); bc->cand_matchedlabel_set = B_TRUE; } label = ip6_asp_lookup(&cc->cand_srcaddr, NULL, ipst); cc->cand_matchedlabel = ip6_asp_labelcmp(label, dstinfo->dst_label); cc->cand_matchedlabel_set = B_TRUE; if (bc->cand_matchedlabel == cc->cand_matchedlabel) return (CAND_TIE); else if (cc->cand_matchedlabel) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer public addresses over temporary ones. An application can reverse * the logic of this rule and prefer temporary addresses by using the * IPV6_SRC_PREFERENCES socket option. */ /* ARGSUSED3 */ static rule_res_t rule_temporary(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_istmp_set) { bc->cand_istmp = ((bc->cand_flags & IPIF_TEMPORARY) != 0); bc->cand_istmp_set = B_TRUE; } cc->cand_istmp = ((cc->cand_flags & IPIF_TEMPORARY) != 0); cc->cand_istmp_set = B_TRUE; if (bc->cand_istmp == cc->cand_istmp) return (CAND_TIE); if (dstinfo->dst_prefer_src_tmp && cc->cand_istmp) return (CAND_PREFER); else if (!dstinfo->dst_prefer_src_tmp && !cc->cand_istmp) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer source addresses with longer matching prefix with the destination * under the interface mask. This gets us on the same subnet before applying * any Solaris-specific rules. */ /* ARGSUSED3 */ static rule_res_t rule_ifprefix(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_pref_eq_set) { bc->cand_pref_eq = V6_MASK_EQ_2(bc->cand_srcaddr, bc->cand_mask, *dstinfo->dst_addr); bc->cand_pref_eq_set = B_TRUE; } cc->cand_pref_eq = V6_MASK_EQ_2(cc->cand_srcaddr, cc->cand_mask, *dstinfo->dst_addr); cc->cand_pref_eq_set = B_TRUE; if (bc->cand_pref_eq) { if (cc->cand_pref_eq) { if (!bc->cand_pref_len_set) { bc->cand_pref_len = ip_mask_to_plen_v6(&bc->cand_mask); bc->cand_pref_len_set = B_TRUE; } cc->cand_pref_len = ip_mask_to_plen_v6(&cc->cand_mask); cc->cand_pref_len_set = B_TRUE; if (bc->cand_pref_len == cc->cand_pref_len) return (CAND_TIE); else if (bc->cand_pref_len > cc->cand_pref_len) return (CAND_AVOID); else return (CAND_PREFER); } else { return (CAND_AVOID); } } else { if (cc->cand_pref_eq) return (CAND_PREFER); else return (CAND_TIE); } } /* * Prefer to use zone-specific addresses when possible instead of all-zones * addresses. */ /* ARGSUSED2 */ static rule_res_t rule_zone_specific(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if ((bc->cand_zoneid == ALL_ZONES) == (cc->cand_zoneid == ALL_ZONES)) return (CAND_TIE); else if (cc->cand_zoneid == ALL_ZONES) return (CAND_AVOID); else return (CAND_PREFER); } /* * Prefer to use DHCPv6 (first) and static addresses (second) when possible * instead of statelessly autoconfigured addresses. * * This is done after trying all other preferences (and before the final tie * breaker) so that, if all else is equal, we select addresses configured by * DHCPv6 over other addresses. We presume that DHCPv6 addresses, unlike * stateless autoconfigured addresses, are deliberately configured by an * administrator, and thus are correctly set up in DNS and network packet * filters. */ /* ARGSUSED2 */ static rule_res_t rule_addr_type(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { #define ATYPE(x) \ ((x) & IPIF_DHCPRUNNING) ? 1 : ((x) & IPIF_ADDRCONF) ? 3 : 2 int bcval = ATYPE(bc->cand_flags); int ccval = ATYPE(cc->cand_flags); #undef ATYPE if (bcval == ccval) return (CAND_TIE); else if (ccval < bcval) return (CAND_PREFER); else return (CAND_AVOID); } /* * Prefer source addresses with longer matching prefix with the destination. * We do the longest matching prefix calculation by doing an xor of both * addresses with the destination, and pick the address with the longest string * of leading zeros, as per CommonPrefixLen() defined in RFC 3484. */ /* ARGSUSED3 */ static rule_res_t rule_prefix(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { if (!bc->cand_common_pref_set) { bc->cand_common_pref = ip_common_prefix_v6(&bc->cand_srcaddr, dstinfo->dst_addr); bc->cand_common_pref_set = B_TRUE; } cc->cand_common_pref = ip_common_prefix_v6(&cc->cand_srcaddr, dstinfo->dst_addr); cc->cand_common_pref_set = B_TRUE; if (bc->cand_common_pref == cc->cand_common_pref) return (CAND_TIE); else if (bc->cand_common_pref > cc->cand_common_pref) return (CAND_AVOID); else return (CAND_PREFER); } /* * Last rule: we must pick something, so just prefer the current best * candidate. */ /* ARGSUSED */ static rule_res_t rule_must_be_last(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo, ip_stack_t *ipst) { return (CAND_AVOID); } /* * Determine the best source address given a destination address and a * destination ill. If no suitable source address is found, it returns * NULL. If there is a usable address pointed to by the usesrc * (i.e ill_usesrc_ifindex != 0) then return that first since it is more * fine grained (i.e per interface) * * This implementation is based on the "Default Address Selection for IPv6" * specification produced by the IETF IPv6 working group. It has been * implemented so that the list of addresses is only traversed once (the * specification's algorithm could traverse the list of addresses once for * every rule). * * The restrict_ill argument restricts the algorithm to choose a source * address that is assigned to the destination ill. This is used when * the destination address is a link-local or multicast address, and when * ipv6_strict_dst_multihoming is turned on. * * src_prefs is the caller's set of source address preferences. If source * address selection is being called to determine the source address of a * connected socket (from ip_set_destination_v6()), then the preferences are * taken from conn_ixa->ixa_src_preferences. These preferences can be set on a * per-socket basis using the IPV6_SRC_PREFERENCES socket option. The only * preference currently implemented is for rfc3041 temporary addresses. */ ipif_t * ipif_select_source_v6(ill_t *dstill, const in6_addr_t *dst, boolean_t restrict_ill, uint32_t src_prefs, zoneid_t zoneid, boolean_t allow_usesrc, boolean_t *notreadyp) { dstinfo_t dstinfo; char dstr[INET6_ADDRSTRLEN]; char sstr[INET6_ADDRSTRLEN]; ipif_t *ipif, *start_ipif, *next_ipif; ill_t *ill, *usesrc_ill = NULL, *ipmp_ill = NULL; ill_walk_context_t ctx; cand_t best_c; /* The best candidate */ cand_t curr_c; /* The current candidate */ uint_t index; boolean_t first_candidate = B_TRUE; rule_res_t rule_result; tsol_tpc_t *src_rhtp, *dst_rhtp; ip_stack_t *ipst = dstill->ill_ipst; /* * The list of ordering rules. They are applied in the order they * appear in the list. * * Solaris doesn't currently support Mobile IPv6, so there's no * rule_mipv6 corresponding to rule 4 in the specification. */ rulef_t rules[] = { rule_isdst, rule_scope, rule_deprecated, rule_preferred, rule_interface, rule_label, rule_temporary, rule_ifprefix, /* local rules after this */ rule_zone_specific, rule_addr_type, rule_prefix, /* local rules before this */ rule_must_be_last, /* must always be last */ NULL }; ASSERT(dstill->ill_isv6); ASSERT(!IN6_IS_ADDR_V4MAPPED(dst)); /* * Check if there is a usable src address pointed to by the * usesrc ifindex. This has higher precedence since it is * finer grained (i.e per interface) v/s being system wide. */ if (dstill->ill_usesrc_ifindex != 0 && allow_usesrc) { if ((usesrc_ill = ill_lookup_on_ifindex(dstill->ill_usesrc_ifindex, B_TRUE, ipst)) != NULL) { dstinfo.dst_ill = usesrc_ill; } else { return (NULL); } } else if (IS_UNDER_IPMP(dstill)) { /* * Test addresses should never be used for source address * selection, so if we were passed an underlying ill, switch * to the IPMP meta-interface. */ if ((ipmp_ill = ipmp_ill_hold_ipmp_ill(dstill)) != NULL) dstinfo.dst_ill = ipmp_ill; else return (NULL); } else { dstinfo.dst_ill = dstill; } /* * If we're dealing with an unlabeled destination on a labeled system, * make sure that we ignore source addresses that are incompatible with * the destination's default label. That destination's default label * must dominate the minimum label on the source address. * * (Note that this has to do with Trusted Solaris. It's not related to * the labels described by ip6_asp_lookup.) */ dst_rhtp = NULL; if (is_system_labeled()) { dst_rhtp = find_tpc(dst, IPV6_VERSION, B_FALSE); if (dst_rhtp == NULL) return (NULL); if (dst_rhtp->tpc_tp.host_type != UNLABELED) { TPC_RELE(dst_rhtp); dst_rhtp = NULL; } } dstinfo.dst_addr = dst; dstinfo.dst_scope = ip_addr_scope_v6(dst); dstinfo.dst_label = ip6_asp_lookup(dst, NULL, ipst); dstinfo.dst_prefer_src_tmp = ((src_prefs & IPV6_PREFER_SRC_TMP) != 0); rw_enter(&ipst->ips_ill_g_lock, RW_READER); /* * Section three of the I-D states that for multicast and * link-local destinations, the candidate set must be restricted to * an interface that is on the same link as the outgoing interface. * Also, when ipv6_strict_dst_multihoming is turned on, always * restrict the source address to the destination link as doing * otherwise will almost certainly cause problems. */ if (IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst) || ipst->ips_ipv6_strict_dst_multihoming || usesrc_ill != NULL) { dstinfo.dst_restrict_ill = B_TRUE; } else { dstinfo.dst_restrict_ill = restrict_ill; } bzero(&best_c, sizeof (cand_t)); /* * Take a pass through the list of IPv6 interfaces to choose the best * possible source address. If restrict_ill is set, just use dst_ill. */ if (dstinfo.dst_restrict_ill) ill = dstinfo.dst_ill; else ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ASSERT(ill->ill_isv6); /* * Test addresses should never be used for source address * selection, so ignore underlying ills. */ if (IS_UNDER_IPMP(ill)) continue; if (ill->ill_ipif == NULL) continue; /* * For source address selection, we treat the ipif list as * circular and continue until we get back to where we * started. This allows IPMP to vary source address selection * (which improves inbound load spreading) by caching its last * ending point and starting from there. NOTE: we don't have * to worry about ill_src_ipif changing ills since that can't * happen on the IPMP ill. */ start_ipif = ill->ill_ipif; if (IS_IPMP(ill) && ill->ill_src_ipif != NULL) start_ipif = ill->ill_src_ipif; ipif = start_ipif; do { if ((next_ipif = ipif->ipif_next) == NULL) next_ipif = ill->ill_ipif; if (!IPIF_VALID_IPV6_SOURCE(ipif)) continue; if (!ipif->ipif_addr_ready) { if (notreadyp != NULL) *notreadyp = B_TRUE; continue; } if (zoneid != ALL_ZONES && ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES) continue; /* * Check compatibility of local address for * destination's default label if we're on a labeled * system. Incompatible addresses can't be used at * all and must be skipped over. */ if (dst_rhtp != NULL) { boolean_t incompat; src_rhtp = find_tpc(&ipif->ipif_v6lcl_addr, IPV6_VERSION, B_FALSE); if (src_rhtp == NULL) continue; incompat = src_rhtp->tpc_tp.host_type != SUN_CIPSO || src_rhtp->tpc_tp.tp_doi != dst_rhtp->tpc_tp.tp_doi || (!_blinrange(&dst_rhtp->tpc_tp.tp_def_label, &src_rhtp->tpc_tp.tp_sl_range_cipso) && !blinlset(&dst_rhtp->tpc_tp.tp_def_label, src_rhtp->tpc_tp.tp_sl_set_cipso)); TPC_RELE(src_rhtp); if (incompat) continue; } if (first_candidate) { /* * This is first valid address in the list. * It is automatically the best candidate * so far. */ best_c.cand_ipif = ipif; first_candidate = B_FALSE; continue; } bzero(&curr_c, sizeof (cand_t)); curr_c.cand_ipif = ipif; /* * Compare this current candidate (curr_c) with the * best candidate (best_c) by applying the * comparison rules in order until one breaks the * tie. */ for (index = 0; rules[index] != NULL; index++) { /* Apply a comparison rule. */ rule_result = (rules[index])(&best_c, &curr_c, &dstinfo, ipst); if (rule_result == CAND_AVOID) { /* * The best candidate is still the * best candidate. Forget about * this current candidate and go on * to the next one. */ break; } else if (rule_result == CAND_PREFER) { /* * This candidate is prefered. It * becomes the best candidate so * far. Go on to the next address. */ best_c = curr_c; break; } /* We have a tie, apply the next rule. */ } /* * The last rule must be a tie breaker rule and * must never produce a tie. At this point, the * candidate should have either been rejected, or * have been prefered as the best candidate so far. */ ASSERT(rule_result != CAND_TIE); } while ((ipif = next_ipif) != start_ipif); /* * For IPMP, update the source ipif rotor to the next ipif, * provided we can look it up. (We must not use it if it's * IPIF_CONDEMNED since we may have grabbed ill_g_lock after * ipif_free() checked ill_src_ipif.) */ if (IS_IPMP(ill) && ipif != NULL) { mutex_enter(&ipif->ipif_ill->ill_lock); next_ipif = ipif->ipif_next; if (next_ipif != NULL && !IPIF_IS_CONDEMNED(next_ipif)) ill->ill_src_ipif = next_ipif; else ill->ill_src_ipif = NULL; mutex_exit(&ipif->ipif_ill->ill_lock); } /* * Only one ill to consider if dst_restrict_ill is set. */ if (dstinfo.dst_restrict_ill) break; } ipif = best_c.cand_ipif; ip1dbg(("ipif_select_source_v6(%s, %s) -> %s\n", dstinfo.dst_ill->ill_name, inet_ntop(AF_INET6, dstinfo.dst_addr, dstr, sizeof (dstr)), (ipif == NULL ? "NULL" : inet_ntop(AF_INET6, &ipif->ipif_v6lcl_addr, sstr, sizeof (sstr))))); if (usesrc_ill != NULL) ill_refrele(usesrc_ill); if (ipmp_ill != NULL) ill_refrele(ipmp_ill); if (dst_rhtp != NULL) TPC_RELE(dst_rhtp); if (ipif == NULL) { rw_exit(&ipst->ips_ill_g_lock); return (NULL); } mutex_enter(&ipif->ipif_ill->ill_lock); if (!IPIF_IS_CONDEMNED(ipif)) { ipif_refhold_locked(ipif); mutex_exit(&ipif->ipif_ill->ill_lock); rw_exit(&ipst->ips_ill_g_lock); return (ipif); } mutex_exit(&ipif->ipif_ill->ill_lock); rw_exit(&ipst->ips_ill_g_lock); ip1dbg(("ipif_select_source_v6 cannot lookup ipif %p" " returning null \n", (void *)ipif)); return (NULL); } /* * Pick a source address based on the destination ill and an optional setsrc * address. * The result is stored in srcp. If generation is set, then put the source * generation number there before we look for the source address (to avoid * missing changes in the set of source addresses. * If flagsp is set, then us it to pass back ipif_flags. * * If the caller wants to cache the returned source address and detect when * that might be stale, the caller should pass in a generation argument, * which the caller can later compare against ips_src_generation * * The precedence order for selecting an IPv6 source address is: * - RTF_SETSRC on the first ire in the recursive lookup always wins. * - If usrsrc is set, swap the ill to be the usesrc one. * - If IPMP is used on the ill, select a random address from the most * preferred ones below: * That is followed by the long list of IPv6 source address selection rules * starting with rule_isdst(), rule_scope(), etc. * * We have lower preference for ALL_ZONES IP addresses, * as they pose problems with unlabeled destinations. * * Note that when multiple IP addresses match e.g., with rule_scope() we pick * the first one if IPMP is not in use. With IPMP we randomize. */ int ip_select_source_v6(ill_t *ill, const in6_addr_t *setsrc, const in6_addr_t *dst, zoneid_t zoneid, ip_stack_t *ipst, uint_t restrict_ill, uint32_t src_prefs, in6_addr_t *srcp, uint32_t *generation, uint64_t *flagsp) { ipif_t *ipif; boolean_t notready = B_FALSE; /* Set if !ipif_addr_ready found */ if (flagsp != NULL) *flagsp = 0; /* * Need to grab the generation number before we check to * avoid a race with a change to the set of local addresses. * No lock needed since the thread which updates the set of local * addresses use ipif/ill locks and exit those (hence a store memory * barrier) before doing the atomic increase of ips_src_generation. */ if (generation != NULL) { *generation = ipst->ips_src_generation; } /* Was RTF_SETSRC set on the first IRE in the recursive lookup? */ if (setsrc != NULL && !IN6_IS_ADDR_UNSPECIFIED(setsrc)) { *srcp = *setsrc; return (0); } ipif = ipif_select_source_v6(ill, dst, restrict_ill, src_prefs, zoneid, B_TRUE, ¬ready); if (ipif == NULL) { if (notready) return (ENETDOWN); else return (EADDRNOTAVAIL); } *srcp = ipif->ipif_v6lcl_addr; if (flagsp != NULL) *flagsp = ipif->ipif_flags; ipif_refrele(ipif); return (0); } /* * Perform an attach and bind to get phys addr plus info_req for * the physical device. * q and mp represents an ioctl which will be queued waiting for * completion of the DLPI message exchange. * MUST be called on an ill queue. * * Returns EINPROGRESS when mp has been consumed by queueing it. * The ioctl will complete in ip_rput. */ int ill_dl_phys(ill_t *ill, ipif_t *ipif, mblk_t *mp, queue_t *q) { mblk_t *v6token_mp = NULL; mblk_t *v6lla_mp = NULL; mblk_t *dest_mp = NULL; mblk_t *phys_mp = NULL; mblk_t *info_mp = NULL; mblk_t *attach_mp = NULL; mblk_t *bind_mp = NULL; mblk_t *unbind_mp = NULL; mblk_t *notify_mp = NULL; mblk_t *capab_mp = NULL; ip1dbg(("ill_dl_phys(%s:%u)\n", ill->ill_name, ipif->ipif_id)); ASSERT(ill->ill_dlpi_style_set); ASSERT(WR(q)->q_next != NULL); if (ill->ill_isv6) { v6token_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) + sizeof (t_scalar_t), DL_PHYS_ADDR_REQ); if (v6token_mp == NULL) goto bad; ((dl_phys_addr_req_t *)v6token_mp->b_rptr)->dl_addr_type = DL_IPV6_TOKEN; v6lla_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) + sizeof (t_scalar_t), DL_PHYS_ADDR_REQ); if (v6lla_mp == NULL) goto bad; ((dl_phys_addr_req_t *)v6lla_mp->b_rptr)->dl_addr_type = DL_IPV6_LINK_LAYER_ADDR; } if (ill->ill_mactype == DL_IPV4 || ill->ill_mactype == DL_IPV6) { dest_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) + sizeof (t_scalar_t), DL_PHYS_ADDR_REQ); if (dest_mp == NULL) goto bad; ((dl_phys_addr_req_t *)dest_mp->b_rptr)->dl_addr_type = DL_CURR_DEST_ADDR; } /* * Allocate a DL_NOTIFY_REQ and set the notifications we want. */ notify_mp = ip_dlpi_alloc(sizeof (dl_notify_req_t) + sizeof (long), DL_NOTIFY_REQ); if (notify_mp == NULL) goto bad; ((dl_notify_req_t *)notify_mp->b_rptr)->dl_notifications = (DL_NOTE_PHYS_ADDR | DL_NOTE_SDU_SIZE | DL_NOTE_FASTPATH_FLUSH | DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN | DL_NOTE_CAPAB_RENEG | DL_NOTE_PROMISC_ON_PHYS | DL_NOTE_PROMISC_OFF_PHYS | DL_NOTE_REPLUMB); phys_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) + sizeof (t_scalar_t), DL_PHYS_ADDR_REQ); if (phys_mp == NULL) goto bad; ((dl_phys_addr_req_t *)phys_mp->b_rptr)->dl_addr_type = DL_CURR_PHYS_ADDR; info_mp = ip_dlpi_alloc( sizeof (dl_info_req_t) + sizeof (dl_info_ack_t), DL_INFO_REQ); if (info_mp == NULL) goto bad; ASSERT(ill->ill_dlpi_capab_state == IDCS_UNKNOWN); capab_mp = ip_dlpi_alloc(sizeof (dl_capability_req_t), DL_CAPABILITY_REQ); if (capab_mp == NULL) goto bad; bind_mp = ip_dlpi_alloc(sizeof (dl_bind_req_t) + sizeof (long), DL_BIND_REQ); if (bind_mp == NULL) goto bad; ((dl_bind_req_t *)bind_mp->b_rptr)->dl_sap = ill->ill_sap; ((dl_bind_req_t *)bind_mp->b_rptr)->dl_service_mode = DL_CLDLS; unbind_mp = ip_dlpi_alloc(sizeof (dl_unbind_req_t), DL_UNBIND_REQ); if (unbind_mp == NULL) goto bad; /* If we need to attach, pre-alloc and initialize the mblk */ if (ill->ill_needs_attach) { attach_mp = ip_dlpi_alloc(sizeof (dl_attach_req_t), DL_ATTACH_REQ); if (attach_mp == NULL) goto bad; ((dl_attach_req_t *)attach_mp->b_rptr)->dl_ppa = ill->ill_ppa; } /* * Here we are going to delay the ioctl ack until after * ACKs from DL_PHYS_ADDR_REQ. So need to save the * original ioctl message before sending the requests */ mutex_enter(&ill->ill_lock); /* ipsq_pending_mp_add won't fail since we pass in a NULL connp */ (void) ipsq_pending_mp_add(NULL, ipif, ill->ill_wq, mp, 0); /* * Set ill_phys_addr_pend to zero. It will be set to the addr_type of * the DL_PHYS_ADDR_REQ in ill_dlpi_send() and ill_dlpi_done(). It will * be used to track which DL_PHYS_ADDR_REQ is being ACK'd/NAK'd. */ ill->ill_phys_addr_pend = 0; mutex_exit(&ill->ill_lock); if (attach_mp != NULL) { ip1dbg(("ill_dl_phys: attach\n")); ill_dlpi_send(ill, attach_mp); } ill_dlpi_send(ill, bind_mp); ill_dlpi_send(ill, info_mp); /* * Send the capability request to get the VRRP capability information. */ ill_capability_send(ill, capab_mp); if (v6token_mp != NULL) ill_dlpi_send(ill, v6token_mp); if (v6lla_mp != NULL) ill_dlpi_send(ill, v6lla_mp); if (dest_mp != NULL) ill_dlpi_send(ill, dest_mp); ill_dlpi_send(ill, phys_mp); ill_dlpi_send(ill, notify_mp); ill_dlpi_send(ill, unbind_mp); /* * This operation will complete in ip_rput_dlpi_writer with either * a DL_PHYS_ADDR_ACK or DL_ERROR_ACK. */ return (EINPROGRESS); bad: freemsg(v6token_mp); freemsg(v6lla_mp); freemsg(dest_mp); freemsg(phys_mp); freemsg(info_mp); freemsg(attach_mp); freemsg(bind_mp); freemsg(capab_mp); freemsg(unbind_mp); freemsg(notify_mp); return (ENOMEM); } /* Add room for tcp+ip headers */ uint_t ip_loopback_mtu_v6plus = IP_LOOPBACK_MTU + IPV6_HDR_LEN + 20; /* * DLPI is up. * Create all the IREs associated with an interface bring up multicast. * Set the interface flag and finish other initialization * that potentially had to be differed to after DL_BIND_ACK. */ int ipif_up_done_v6(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; int err; boolean_t loopback = B_FALSE; ip1dbg(("ipif_up_done_v6(%s:%u)\n", ipif->ipif_ill->ill_name, ipif->ipif_id)); DTRACE_PROBE3(ipif__downup, char *, "ipif_up_done_v6", ill_t *, ill, ipif_t *, ipif); /* Check if this is a loopback interface */ if (ipif->ipif_ill->ill_wq == NULL) loopback = B_TRUE; ASSERT(ipif->ipif_isv6); ASSERT(!MUTEX_HELD(&ipif->ipif_ill->ill_lock)); if (IS_LOOPBACK(ill) || ill->ill_net_type == IRE_IF_NORESOLVER) { nce_t *loop_nce = NULL; uint16_t flags = (NCE_F_MYADDR | NCE_F_NONUD | NCE_F_AUTHORITY); /* * lo0:1 and subsequent ipifs were marked IRE_LOCAL in * ipif_lookup_on_name(), but in the case of zones we can have * several loopback addresses on lo0. So all the interfaces with * loopback addresses need to be marked IRE_LOOPBACK. */ if (IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6lcl_addr, &ipv6_loopback)) ipif->ipif_ire_type = IRE_LOOPBACK; else ipif->ipif_ire_type = IRE_LOCAL; if (ill->ill_net_type != IRE_LOOPBACK) flags |= NCE_F_PUBLISH; err = nce_lookup_then_add_v6(ill, NULL, ill->ill_phys_addr_length, &ipif->ipif_v6lcl_addr, flags, ND_REACHABLE, &loop_nce); /* A shared-IP zone sees EEXIST for lo0:N */ if (err == 0 || err == EEXIST) { ipif->ipif_added_nce = 1; loop_nce->nce_ipif_cnt++; nce_refrele(loop_nce); err = 0; } else { ASSERT(loop_nce == NULL); return (err); } } err = ipif_add_ires_v6(ipif, loopback); if (err != 0) { /* * See comments about return value from * ipif_addr_availability_check() in ipif_add_ires_v6(). */ if (err != EADDRINUSE) { ipif_ndp_down(ipif); } else { /* * Make IPMP aware of the deleted ipif so that * the needed ipmp cleanup (e.g., of ipif_bound_ill) * can be completed. Note that we do not want to * destroy the nce that was created on the ipmp_ill * for the active copy of the duplicate address in * use. */ if (IS_IPMP(ill)) ipmp_illgrp_del_ipif(ill->ill_grp, ipif); err = EADDRNOTAVAIL; } return (err); } if (ill->ill_ipif_up_count == 1 && !loopback) { /* Recover any additional IREs entries for this ill */ (void) ill_recover_saved_ire(ill); } if (ill->ill_need_recover_multicast) { /* * Need to recover all multicast memberships in the driver. * This had to be deferred until we had attached. */ ill_recover_multicast(ill); } if (ill->ill_ipif_up_count == 1) { /* * Since the interface is now up, it may now be active. */ if (IS_UNDER_IPMP(ill)) ipmp_ill_refresh_active(ill); } /* Join the allhosts multicast address and the solicited node MC */ ipif_multicast_up(ipif); /* Perhaps ilgs should use this ill */ update_conn_ill(NULL, ill->ill_ipst); if (ipif->ipif_addr_ready) ipif_up_notify(ipif); return (0); } /* * Add the IREs associated with the ipif. * Those MUST be explicitly removed in ipif_delete_ires_v6. */ static int ipif_add_ires_v6(ipif_t *ipif, boolean_t loopback) { ill_t *ill = ipif->ipif_ill; ip_stack_t *ipst = ill->ill_ipst; in6_addr_t v6addr; in6_addr_t route_mask; int err; char buf[INET6_ADDRSTRLEN]; ire_t *ire_local = NULL; /* LOCAL or LOOPBACK */ ire_t *ire_if = NULL; in6_addr_t *gw; if (!IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6lcl_addr) && !(ipif->ipif_flags & IPIF_NOLOCAL)) { /* * If we're on a labeled system then make sure that zone- * private addresses have proper remote host database entries. */ if (is_system_labeled() && ipif->ipif_ire_type != IRE_LOOPBACK) { if (ip6opt_ls == 0) { cmn_err(CE_WARN, "IPv6 not enabled " "via /etc/system"); return (EINVAL); } if (!tsol_check_interface_address(ipif)) return (EINVAL); } if (loopback) gw = &ipif->ipif_v6lcl_addr; else gw = NULL; /* Register the source address for __sin6_src_id */ err = ip_srcid_insert(&ipif->ipif_v6lcl_addr, ipif->ipif_zoneid, ipst); if (err != 0) { ip0dbg(("ipif_add_ires_v6: srcid_insert %d\n", err)); return (err); } /* * If the interface address is set, create the LOCAL * or LOOPBACK IRE. */ ip1dbg(("ipif_add_ires_v6: creating IRE %d for %s\n", ipif->ipif_ire_type, inet_ntop(AF_INET6, &ipif->ipif_v6lcl_addr, buf, sizeof (buf)))); ire_local = ire_create_v6( &ipif->ipif_v6lcl_addr, /* dest address */ &ipv6_all_ones, /* mask */ gw, /* gateway */ ipif->ipif_ire_type, /* LOCAL or LOOPBACK */ ipif->ipif_ill, /* interface */ ipif->ipif_zoneid, ((ipif->ipif_flags & IPIF_PRIVATE) ? RTF_PRIVATE : 0) | RTF_KERNEL, NULL, ipst); if (ire_local == NULL) { ip1dbg(("ipif_up_done_v6: NULL ire_local\n")); err = ENOMEM; goto bad; } } /* Set up the IRE_IF_RESOLVER or IRE_IF_NORESOLVER, as appropriate. */ if (!loopback && !(ipif->ipif_flags & IPIF_NOXMIT) && !(IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6subnet) && IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6net_mask))) { /* ipif_v6subnet is ipif_v6pp_dst_addr for pt-pt */ v6addr = ipif->ipif_v6subnet; if (ipif->ipif_flags & IPIF_POINTOPOINT) { route_mask = ipv6_all_ones; } else { route_mask = ipif->ipif_v6net_mask; } ip1dbg(("ipif_add_ires_v6: creating if IRE %d for %s\n", ill->ill_net_type, inet_ntop(AF_INET6, &v6addr, buf, sizeof (buf)))); ire_if = ire_create_v6( &v6addr, /* dest pref */ &route_mask, /* mask */ &ipif->ipif_v6lcl_addr, /* gateway */ ill->ill_net_type, /* IF_[NO]RESOLVER */ ipif->ipif_ill, ipif->ipif_zoneid, ((ipif->ipif_flags & IPIF_PRIVATE) ? RTF_PRIVATE : 0) | RTF_KERNEL, NULL, ipst); if (ire_if == NULL) { ip1dbg(("ipif_up_done: NULL ire_if\n")); err = ENOMEM; goto bad; } } /* * Need to atomically check for IP address availability under * ip_addr_avail_lock. ill_g_lock is held as reader to ensure no new * ills or new ipifs can be added while we are checking availability. */ rw_enter(&ipst->ips_ill_g_lock, RW_READER); mutex_enter(&ipst->ips_ip_addr_avail_lock); ill->ill_ipif_up_count++; ipif->ipif_flags |= IPIF_UP; err = ip_addr_availability_check(ipif); mutex_exit(&ipst->ips_ip_addr_avail_lock); rw_exit(&ipst->ips_ill_g_lock); if (err != 0) { /* * Our address may already be up on the same ill. In this case, * the external resolver entry for our ipif replaced the one for * the other ipif. So we don't want to delete it (otherwise the * other ipif would be unable to send packets). * ip_addr_availability_check() identifies this case for us and * returns EADDRINUSE; Caller must turn it into EADDRNOTAVAIL * which is the expected error code. * * Note that ipif_ndp_down() will only delete the nce in the * case when the nce_ipif_cnt drops to 0. */ ill->ill_ipif_up_count--; ipif->ipif_flags &= ~IPIF_UP; goto bad; } /* * Add in all newly created IREs. * We add the IRE_INTERFACE before the IRE_LOCAL to ensure * that lookups find the IRE_LOCAL even if the IRE_INTERFACE is * a /128 route. */ if (ire_if != NULL) { ire_if = ire_add(ire_if); if (ire_if == NULL) { err = ENOMEM; goto bad2; } #ifdef DEBUG ire_refhold_notr(ire_if); ire_refrele(ire_if); #endif } if (ire_local != NULL) { ire_local = ire_add(ire_local); if (ire_local == NULL) { err = ENOMEM; goto bad2; } #ifdef DEBUG ire_refhold_notr(ire_local); ire_refrele(ire_local); #endif } rw_enter(&ipst->ips_ill_g_lock, RW_WRITER); if (ire_local != NULL) ipif->ipif_ire_local = ire_local; if (ire_if != NULL) ipif->ipif_ire_if = ire_if; rw_exit(&ipst->ips_ill_g_lock); ire_local = NULL; ire_if = NULL; if (ipif->ipif_addr_ready) ipif_up_notify(ipif); return (0); bad2: ill->ill_ipif_up_count--; ipif->ipif_flags &= ~IPIF_UP; bad: if (ire_local != NULL) ire_delete(ire_local); if (ire_if != NULL) ire_delete(ire_if); rw_enter(&ipst->ips_ill_g_lock, RW_WRITER); ire_local = ipif->ipif_ire_local; ipif->ipif_ire_local = NULL; ire_if = ipif->ipif_ire_if; ipif->ipif_ire_if = NULL; rw_exit(&ipst->ips_ill_g_lock); if (ire_local != NULL) { ire_delete(ire_local); ire_refrele_notr(ire_local); } if (ire_if != NULL) { ire_delete(ire_if); ire_refrele_notr(ire_if); } (void) ip_srcid_remove(&ipif->ipif_v6lcl_addr, ipif->ipif_zoneid, ipst); return (err); } /* Remove all the IREs created by ipif_add_ires_v6 */ void ipif_delete_ires_v6(ipif_t *ipif) { ill_t *ill = ipif->ipif_ill; ip_stack_t *ipst = ill->ill_ipst; ire_t *ire; rw_enter(&ipst->ips_ill_g_lock, RW_WRITER); ire = ipif->ipif_ire_local; ipif->ipif_ire_local = NULL; rw_exit(&ipst->ips_ill_g_lock); if (ire != NULL) { /* * Move count to ipif so we don't loose the count due to * a down/up dance. */ atomic_add_32(&ipif->ipif_ib_pkt_count, ire->ire_ib_pkt_count); ire_delete(ire); ire_refrele_notr(ire); } rw_enter(&ipst->ips_ill_g_lock, RW_WRITER); ire = ipif->ipif_ire_if; ipif->ipif_ire_if = NULL; rw_exit(&ipst->ips_ill_g_lock); if (ire != NULL) { ire_delete(ire); ire_refrele_notr(ire); } } /* * Delete an ND entry if it exists. */ /* ARGSUSED */ int ip_siocdelndp_v6(ipif_t *ipif, sin_t *dummy_sin, queue_t *q, mblk_t *mp, ip_ioctl_cmd_t *ipip, void *dummy_ifreq) { sin6_t *sin6; struct lifreq *lifr; lif_nd_req_t *lnr; ill_t *ill = ipif->ipif_ill; nce_t *nce; lifr = (struct lifreq *)mp->b_cont->b_cont->b_rptr; lnr = &lifr->lifr_nd; /* Only allow for logical unit zero i.e. not on "le0:17" */ if (ipif->ipif_id != 0) return (EINVAL); if (!ipif->ipif_isv6) return (EINVAL); if (lnr->lnr_addr.ss_family != AF_INET6) return (EAFNOSUPPORT); sin6 = (sin6_t *)&lnr->lnr_addr; /* * Since ND mappings must be consistent across an IPMP group, prohibit * deleting ND mappings on underlying interfaces. * Don't allow deletion of mappings for local addresses. */ if (IS_UNDER_IPMP(ill)) return (EPERM); nce = nce_lookup_v6(ill, &sin6->sin6_addr); if (nce == NULL) return (ESRCH); if (NCE_MYADDR(nce->nce_common)) { nce_refrele(nce); return (EPERM); } /* * delete the nce_common which will also delete the nces on any * under_ill in the case of ipmp. */ ncec_delete(nce->nce_common); nce_refrele(nce); return (0); } /* * Return nbr cache info. */ /* ARGSUSED */ int ip_siocqueryndp_v6(ipif_t *ipif, sin_t *dummy_sin, queue_t *q, mblk_t *mp, ip_ioctl_cmd_t *ipip, void *dummy_ifreq) { ill_t *ill = ipif->ipif_ill; struct lifreq *lifr; lif_nd_req_t *lnr; lifr = (struct lifreq *)mp->b_cont->b_cont->b_rptr; lnr = &lifr->lifr_nd; /* Only allow for logical unit zero i.e. not on "le0:17" */ if (ipif->ipif_id != 0) return (EINVAL); if (!ipif->ipif_isv6) return (EINVAL); if (lnr->lnr_addr.ss_family != AF_INET6) return (EAFNOSUPPORT); if (ill->ill_phys_addr_length > sizeof (lnr->lnr_hdw_addr)) return (EINVAL); return (ndp_query(ill, lnr)); } /* * Perform an update of the nd entry for the specified address. */ /* ARGSUSED */ int ip_siocsetndp_v6(ipif_t *ipif, sin_t *dummy_sin, queue_t *q, mblk_t *mp, ip_ioctl_cmd_t *ipip, void *dummy_ifreq) { sin6_t *sin6; ill_t *ill = ipif->ipif_ill; struct lifreq *lifr; lif_nd_req_t *lnr; ire_t *ire; lifr = (struct lifreq *)mp->b_cont->b_cont->b_rptr; lnr = &lifr->lifr_nd; /* Only allow for logical unit zero i.e. not on "le0:17" */ if (ipif->ipif_id != 0) return (EINVAL); if (!ipif->ipif_isv6) return (EINVAL); if (lnr->lnr_addr.ss_family != AF_INET6) return (EAFNOSUPPORT); sin6 = (sin6_t *)&lnr->lnr_addr; /* * Since ND mappings must be consistent across an IPMP group, prohibit * updating ND mappings on underlying interfaces. Also, since ND * mappings for IPMP data addresses are owned by IP itself, prohibit * updating them. */ if (IS_UNDER_IPMP(ill)) return (EPERM); if (IS_IPMP(ill)) { ire = ire_ftable_lookup_v6(&sin6->sin6_addr, NULL, NULL, IRE_LOCAL, ill, ALL_ZONES, NULL, MATCH_IRE_TYPE | MATCH_IRE_ILL, 0, ill->ill_ipst, NULL); if (ire != NULL) { ire_refrele(ire); return (EPERM); } } return (ndp_sioc_update(ill, lnr)); }