sync with OpenBSD -current
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parent
696b0fa6e4
commit
62f1a75fe4
GPG key ID:
F42C07F07E2E35B7
23 changed files with 92 additions and 144 deletions
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@ -1,4 +1,4 @@
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/* $OpenBSD: in6.c,v 1.264 2024/04/17 08:36:30 florian Exp $ */
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/* $OpenBSD: in6.c,v 1.265 2024/04/21 17:32:10 florian Exp $ */
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/* $KAME: in6.c,v 1.372 2004/06/14 08:14:21 itojun Exp $ */
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/*
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@ -562,13 +562,19 @@ in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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return (EINVAL);
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/*
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* The destination address for a p2p link must have a family
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* of AF_UNSPEC or AF_INET6.
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* The destination address for a p2p link or the address of the
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* announcing router for an autoconf address must have a family of
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* AF_UNSPEC or AF_INET6.
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*/
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if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
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ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
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ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
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return (EAFNOSUPPORT);
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if ((ifp->if_flags & IFF_POINTOPOINT) ||
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(ifp->if_flags & IFF_LOOPBACK) ||
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(ifra->ifra_flags & IN6_IFF_AUTOCONF)) {
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if (ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
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ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
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return (EAFNOSUPPORT);
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} else if (ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
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return (EINVAL);
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/*
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* validate ifra_prefixmask. don't check sin6_family, netmask
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@ -597,27 +603,15 @@ in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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*/
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plen = in6_mask2len(&ia6->ia_prefixmask.sin6_addr, NULL);
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}
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/*
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* If the destination address on a p2p interface is specified,
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* and the address is a scoped one, validate/set the scope
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* zone identifier.
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*/
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dst6 = ifra->ifra_dstaddr;
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if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
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(dst6.sin6_family == AF_INET6)) {
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if (dst6.sin6_family == AF_INET6) {
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error = in6_check_embed_scope(&dst6, ifp->if_index);
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if (error)
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return error;
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}
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/*
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* The destination address can be specified only for a p2p or a
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* loopback interface. If specified, the corresponding prefix length
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* must be 128.
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*/
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if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
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if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0)
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return (EINVAL);
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if (plen != 128)
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if (((ifp->if_flags & IFF_POINTOPOINT) ||
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(ifp->if_flags & IFF_LOOPBACK)) && plen != 128)
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return (EINVAL);
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}
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/* lifetime consistency check */
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@ -652,7 +646,8 @@ in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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ia6->ia_addr.sin6_family = AF_INET6;
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ia6->ia_addr.sin6_len = sizeof(ia6->ia_addr);
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ia6->ia6_updatetime = getuptime();
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if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
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if ((ifp->if_flags & IFF_POINTOPOINT) ||
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(ifp->if_flags & IFF_LOOPBACK)) {
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/*
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* XXX: some functions expect that ifa_dstaddr is not
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* NULL for p2p interfaces.
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@ -686,10 +681,10 @@ in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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/*
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* If a new destination address is specified, scrub the old one and
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* install the new destination. Note that the interface must be
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* p2p or loopback (see the check above.)
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* install the new destination.
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*/
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if ((ifp->if_flags & IFF_POINTOPOINT) && dst6.sin6_family == AF_INET6 &&
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if (((ifp->if_flags & IFF_POINTOPOINT) ||
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(ifp->if_flags & IFF_LOOPBACK)) && dst6.sin6_family == AF_INET6 &&
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!IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia6->ia_dstaddr.sin6_addr)) {
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struct ifaddr *ifa = &ia6->ia_ifa;
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@ -706,6 +701,13 @@ in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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ia6->ia_dstaddr = dst6;
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}
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if ((ifra->ifra_flags & IN6_IFF_AUTOCONF) &&
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dst6.sin6_family == AF_INET6 &&
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!IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia6->ia_gwaddr.sin6_addr)) {
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/* Set or update announcing router */
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ia6->ia_gwaddr = dst6;
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}
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/*
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* Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
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* to see if the address is deprecated or invalidated, but initialize
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@ -1329,13 +1331,21 @@ in6_prefixlen2mask(struct in6_addr *maskp, int len)
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* return the best address out of the same scope
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*/
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struct in6_ifaddr *
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in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, u_int rdomain)
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in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, u_int rdomain,
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struct rtentry *rt)
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{
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int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
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int blen = -1;
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struct ifaddr *ifa;
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struct ifnet *ifp;
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struct in6_ifaddr *ia6_best = NULL;
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struct in6_addr *gw6 = NULL;
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if (rt) {
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if (rt->rt_gateway != NULL &&
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rt->rt_gateway->sa_family == AF_INET6)
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gw6 = &(satosin6(rt->rt_gateway)->sin6_addr);
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}
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if (oifp == NULL) {
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printf("%s: output interface is not specified\n", __func__);
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@ -1460,8 +1470,16 @@ in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, u_int rdomain)
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/*
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* Rule 5.5: Prefer addresses in a prefix advertised
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* by the next-hop.
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* We do not track this information.
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*/
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if (gw6) {
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struct in6_addr *in6_bestgw, *in6_newgw;
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in6_bestgw = &ia6_best->ia_gwaddr.sin6_addr;
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in6_newgw = &ifatoia6(ifa)->ia_gwaddr.sin6_addr;
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if (!IN6_ARE_ADDR_EQUAL(in6_bestgw, gw6) &&
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IN6_ARE_ADDR_EQUAL(in6_newgw, gw6))
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goto replace;
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}
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/*
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* Rule 6: Prefer matching label.
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