/* $NetBSD: in6_pcb.c,v 1.52 2002/09/11 02:46:45 itojun Exp $ */ /* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 */ #include __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.52 2002/09/11 02:46:45 itojun Exp $"); #include "opt_ipsec.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "loop.h" extern struct ifnet loif[NLOOP]; #include "faith.h" #ifdef IPSEC #include #include #endif /* IPSEC */ struct in6_addr zeroin6_addr; int ip6_anonportmin = IPV6PORT_ANONMIN; int ip6_anonportmax = IPV6PORT_ANONMAX; int ip6_lowportmin = IPV6PORT_RESERVEDMIN; int ip6_lowportmax = IPV6PORT_RESERVEDMAX; int in6_pcballoc(so, head) struct socket *so; struct in6pcb *head; { struct in6pcb *in6p; int s; #ifdef IPSEC int error; #endif MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); if (in6p == NULL) return (ENOBUFS); bzero((caddr_t)in6p, sizeof(*in6p)); in6p->in6p_head = head; in6p->in6p_socket = so; in6p->in6p_hops = -1; /* use kernel default */ in6p->in6p_icmp6filt = NULL; #ifdef IPSEC error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); if (error != 0) { FREE(in6p, M_PCB); return error; } #endif /* IPSEC */ s = splnet(); in6p->in6p_next = head->in6p_next; head->in6p_next = in6p; in6p->in6p_prev = head; in6p->in6p_next->in6p_prev = in6p; splx(s); if (ip6_v6only) in6p->in6p_flags |= IN6P_IPV6_V6ONLY; so->so_pcb = (caddr_t)in6p; return (0); } int in6_pcbbind(in6p, nam, p) struct in6pcb *in6p; struct mbuf *nam; struct proc *p; { struct socket *so = in6p->in6p_socket; struct in6pcb *head = in6p->in6p_head; struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; u_int16_t lport = 0; int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) return (EINVAL); if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || (so->so_options & SO_ACCEPTCONN) == 0)) wild = IN6PLOOKUP_WILDCARD; if (nam) { sin6 = mtod(nam, struct sockaddr_in6 *); if (nam->m_len != sizeof(*sin6)) return (EINVAL); /* * We should check the family, but old programs * incorrectly fail to intialize it. */ if (sin6->sin6_family != AF_INET6) return (EAFNOSUPPORT); /* * since we do not check port number duplicate with IPv4 space, * we reject it at this moment. If we leave it, we would * mistakenly allow normal users to hijack tcp/udp ports from * other users. */ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) return (EADDRNOTAVAIL); /* KAME hack: embed scopeid */ if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL) != 0) return EINVAL; /* this must be cleared for ifa_ifwithaddr() */ sin6->sin6_scope_id = 0; lport = sin6->sin6_port; if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { /* * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; * allow compepte duplication of binding if * SO_REUSEPORT is set, or if SO_REUSEADDR is set * and a multicast address is bound on both * new and duplicated sockets. */ if (so->so_options & SO_REUSEADDR) reuseport = SO_REUSEADDR|SO_REUSEPORT; } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { struct sockaddr_in sin; bzero(&sin, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, sizeof(sin.sin_addr)); if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) return EADDRNOTAVAIL; } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { struct ifaddr *ia = NULL; sin6->sin6_port = 0; /* yech... */ if ((in6p->in6p_flags & IN6P_FAITH) == 0 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) return (EADDRNOTAVAIL); /* * bind to an anycast address might accidentally * cause sending a packet with an anycast source * address, so we forbid it. * * We should allow to bind to a deprecated address, * since the application dare to use it. * But, can we assume that they are careful enough * to check if the address is deprecated or not? * Maybe, as a safeguard, we should have a setsockopt * flag to control the bind(2) behavior against * deprecated addresses (default: forbid bind(2)). */ if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) return (EADDRNOTAVAIL); } if (lport) { #ifndef IPNOPRIVPORTS int priv; /* * NOTE: all operating systems use suser() for * privilege check! do not rewrite it into SS_PRIV. */ priv = (p && !suser(p->p_ucred, &p->p_acflag)) ? 1 : 0; /* GROSS */ if (ntohs(lport) < IPV6PORT_RESERVED && !priv) return (EACCES); #endif if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* should check this but we can't ... */ #if 0 struct inpcb *t; t = in_pcblookup_bind(&tcbtable, (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], lport); if (t && (reuseport & t->inp_socket->so_options) == 0) return EADDRINUSE; #endif } else { struct in6pcb *t; t = in6_pcblookup(head, &zeroin6_addr, 0, &sin6->sin6_addr, lport, wild); if (t && (reuseport & t->in6p_socket->so_options) == 0) return (EADDRINUSE); } } in6p->in6p_laddr = sin6->sin6_addr; } if (lport == 0) { int e; if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p, p)) != 0) return (e); } else in6p->in6p_lport = lport; in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ return (0); } /* * Connect from a socket to a specified address. * Both address and port must be specified in argument sin6. * If don't have a local address for this socket yet, * then pick one. */ int in6_pcbconnect(in6p, nam) struct in6pcb *in6p; struct mbuf *nam; { struct in6_addr *in6a = NULL; struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); struct ifnet *ifp = NULL; /* outgoing interface */ int error = 0; #ifdef INET struct in6_addr mapped; #endif struct sockaddr_in6 tmp; (void)&in6a; /* XXX fool gcc */ if (nam->m_len != sizeof(*sin6)) return (EINVAL); if (sin6->sin6_family != AF_INET6) return (EAFNOSUPPORT); if (sin6->sin6_port == 0) return (EADDRNOTAVAIL); /* sanity check for mapped address case */ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) return EINVAL; if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) return EINVAL; } else { if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) return EINVAL; } /* protect *sin6 from overwrites */ tmp = *sin6; sin6 = &tmp; /* KAME hack: embed scopeid */ if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, &ifp) != 0) return EINVAL; /* Source address selection. */ if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && in6p->in6p_laddr.s6_addr32[3] == 0) { #ifdef INET struct sockaddr_in sin, *sinp; bzero(&sin, sizeof(sin)); sin.sin_len = sizeof(sin); sin.sin_family = AF_INET; bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, sizeof(sin.sin_addr)); sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, in6p->in6p_socket->so_options, NULL, &error); if (sinp == 0) { if (error == 0) error = EADDRNOTAVAIL; return (error); } bzero(&mapped, sizeof(mapped)); mapped.s6_addr16[5] = htons(0xffff); bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); in6a = &mapped; #else return EADDRNOTAVAIL; #endif } else { /* * XXX: in6_selectsrc might replace the bound local address * with the address specified by setsockopt(IPV6_PKTINFO). * Is it the intended behavior? */ in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, in6p->in6p_moptions, &in6p->in6p_route, &in6p->in6p_laddr, &error); if (in6a == 0) { if (error == 0) error = EADDRNOTAVAIL; return (error); } } if (in6p->in6p_route.ro_rt) ifp = in6p->in6p_route.ro_rt->rt_ifp; in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); if (in6_pcblookup(in6p->in6p_head, &sin6->sin6_addr, sin6->sin6_port, IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, in6p->in6p_lport, 0)) return (EADDRINUSE); if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && in6p->in6p_laddr.s6_addr32[3] == 0)) { /* * XXX in IPv4 mapped address case, we should grab fresh * local port number by in_pcbbind, not in6_pcbbind. * if we are in bad luck, we may assign conflicting port number * between IPv4 and IPv6 unwillingly. */ if (in6p->in6p_lport == 0) { (void)in6_pcbbind(in6p, (struct mbuf *)0, (struct proc *)0); } in6p->in6p_laddr = *in6a; } in6p->in6p_faddr = sin6->sin6_addr; in6p->in6p_fport = sin6->sin6_port; /* * xxx kazu flowlabel is necessary for connect? * but if this line is missing, the garbage value remains. */ in6p->in6p_flowinfo = sin6->sin6_flowinfo; #ifdef IPSEC if (in6p->in6p_socket->so_type == SOCK_STREAM) ipsec_pcbconn(in6p->in6p_sp); #endif return (0); } void in6_pcbdisconnect(in6p) struct in6pcb *in6p; { bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); in6p->in6p_fport = 0; if (in6p->in6p_socket->so_state & SS_NOFDREF) in6_pcbdetach(in6p); #ifdef IPSEC ipsec_pcbdisconn(in6p->in6p_sp); #endif } void in6_pcbdetach(in6p) struct in6pcb *in6p; { struct socket *so = in6p->in6p_socket; int s; #ifdef IPSEC ipsec6_delete_pcbpolicy(in6p); #endif /* IPSEC */ sotoin6pcb(so) = 0; sofree(so); if (in6p->in6p_options) m_freem(in6p->in6p_options); if (in6p->in6p_outputopts) { if (in6p->in6p_outputopts->ip6po_rthdr && in6p->in6p_outputopts->ip6po_route.ro_rt) RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); if (in6p->in6p_outputopts->ip6po_m) (void)m_free(in6p->in6p_outputopts->ip6po_m); free(in6p->in6p_outputopts, M_IP6OPT); } if (in6p->in6p_route.ro_rt) rtfree(in6p->in6p_route.ro_rt); ip6_freemoptions(in6p->in6p_moptions); s = splnet(); in6p->in6p_next->in6p_prev = in6p->in6p_prev; in6p->in6p_prev->in6p_next = in6p->in6p_next; in6p->in6p_prev = NULL; splx(s); FREE(in6p, M_PCB); } void in6_setsockaddr(in6p, nam) struct in6pcb *in6p; struct mbuf *nam; { struct sockaddr_in6 *sin6; nam->m_len = sizeof(*sin6); sin6 = mtod(nam, struct sockaddr_in6 *); bzero((caddr_t)sin6, sizeof(*sin6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(struct sockaddr_in6); sin6->sin6_port = in6p->in6p_lport; /* KAME hack: recover scopeid */ (void)in6_recoverscope(sin6, &in6p->in6p_laddr, NULL); } void in6_setpeeraddr(in6p, nam) struct in6pcb *in6p; struct mbuf *nam; { struct sockaddr_in6 *sin6; nam->m_len = sizeof(*sin6); sin6 = mtod(nam, struct sockaddr_in6 *); bzero((caddr_t)sin6, sizeof(*sin6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(struct sockaddr_in6); sin6->sin6_port = in6p->in6p_fport; /* KAME hack: recover scopeid */ (void)in6_recoverscope(sin6, &in6p->in6p_faddr, NULL); } /* * Pass some notification to all connections of a protocol * associated with address dst. The local address and/or port numbers * may be specified to limit the search. The "usual action" will be * taken, depending on the ctlinput cmd. The caller must filter any * cmds that are uninteresting (e.g., no error in the map). * Call the protocol specific routine (if any) to report * any errors for each matching socket. * * Must be called at splsoftnet. * * Note: src (4th arg) carries the flowlabel value on the original IPv6 * header, in sin6_flowinfo member. */ int in6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify) struct in6pcb *head; struct sockaddr *dst, *src; u_int fport_arg, lport_arg; int cmd; void *cmdarg; void (*notify) __P((struct in6pcb *, int)); { struct in6pcb *in6p, *nin6p; struct sockaddr_in6 sa6_src, *sa6_dst; u_int16_t fport = fport_arg, lport = lport_arg; int errno; int nmatch = 0; u_int32_t flowinfo; if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) return 0; sa6_dst = (struct sockaddr_in6 *)dst; if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) return 0; /* * note that src can be NULL when we get notify by local fragmentation. */ sa6_src = (src == NULL) ? sa6_any : *(struct sockaddr_in6 *)src; flowinfo = sa6_src.sin6_flowinfo; /* * Redirects go to all references to the destination, * and use in6_rtchange to invalidate the route cache. * Dead host indications: also use in6_rtchange to invalidate * the cache, and deliver the error to all the sockets. * Otherwise, if we have knowledge of the local port and address, * deliver only to that socket. */ if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { fport = 0; lport = 0; bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); if (cmd != PRC_HOSTDEAD) notify = in6_rtchange; } errno = inet6ctlerrmap[cmd]; for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { nin6p = in6p->in6p_next; /* * Under the following condition, notify of redirects * to the pcb, without making address matches against inpcb. * - redirect notification is arrived. * - the inpcb is unconnected. * - the inpcb is caching !RTF_HOST routing entry. * - the ICMPv6 notification is from the gateway cached in the * inpcb. i.e. ICMPv6 notification is from nexthop gateway * the inpcb used very recently. * * This is to improve interaction between netbsd/openbsd * redirect handling code, and inpcb route cache code. * without the clause, !RTF_HOST routing entry (which carries * gateway used by inpcb right before the ICMPv6 redirect) * will be cached forever in unconnected inpcb. * * There still is a question regarding to what is TRT: * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be * generated on packet output. inpcb will always cache * RTF_HOST routing entry so there's no need for the clause * (ICMPv6 redirect will update RTF_HOST routing entry, * and inpcb is caching it already). * However, bsdi/freebsd are vulnerable to local DoS attacks * due to the cloned routing entries. * - Specwise, "destination cache" is mentioned in RFC2461. * Jinmei says that it implies bsdi/freebsd behavior, itojun * is not really convinced. * - Having hiwat/lowat on # of cloned host route (redirect/ * pmtud) may be a good idea. netbsd/openbsd has it. see * icmp6_mtudisc_update(). */ if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && in6p->in6p_route.ro_rt && !(in6p->in6p_route.ro_rt->rt_flags & RTF_HOST)) { struct sockaddr_in6 *dst6; dst6 = (struct sockaddr_in6 *)&in6p->in6p_route.ro_dst; if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, &sa6_dst->sin6_addr)) goto do_notify; } /* * Detect if we should notify the error. If no source and * destination ports are specified, but non-zero flowinfo and * local address match, notify the error. This is the case * when the error is delivered with an encrypted buffer * by ESP. Otherwise, just compare addresses and ports * as usual. */ if (lport == 0 && fport == 0 && flowinfo && in6p->in6p_socket != NULL && flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) goto do_notify; else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr) || in6p->in6p_socket == 0 || (lport && in6p->in6p_lport != lport) || (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) || (fport && in6p->in6p_fport != fport)) continue; do_notify: if (notify) (*notify)(in6p, errno); nmatch++; } return nmatch; } void in6_pcbpurgeif0(head, ifp) struct in6pcb *head; struct ifnet *ifp; { struct in6pcb *in6p, *nin6p; struct ip6_moptions *im6o; struct in6_multi_mship *imm, *nimm; for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { nin6p = in6p->in6p_next; im6o = in6p->in6p_moptions; if (im6o) { /* * Unselect the outgoing interface if it is being * detached. */ if (im6o->im6o_multicast_ifp == ifp) im6o->im6o_multicast_ifp = NULL; /* * Drop multicast group membership if we joined * through the interface being detached. * XXX controversial - is it really legal for kernel * to force this? */ for (imm = im6o->im6o_memberships.lh_first; imm != NULL; imm = nimm) { nimm = imm->i6mm_chain.le_next; if (imm->i6mm_maddr->in6m_ifp == ifp) { LIST_REMOVE(imm, i6mm_chain); in6_leavegroup(imm); } } } } } void in6_pcbpurgeif(head, ifp) struct in6pcb *head; struct ifnet *ifp; { struct in6pcb *in6p, *nin6p; for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { nin6p = in6p->in6p_next; if (in6p->in6p_route.ro_rt != NULL && in6p->in6p_route.ro_rt->rt_ifp == ifp) in6_rtchange(in6p, 0); } } /* * Check for alternatives when higher level complains * about service problems. For now, invalidate cached * routing information. If the route was created dynamically * (by a redirect), time to try a default gateway again. */ void in6_losing(in6p) struct in6pcb *in6p; { struct rtentry *rt; struct rt_addrinfo info; if ((rt = in6p->in6p_route.ro_rt) != NULL) { in6p->in6p_route.ro_rt = 0; bzero((caddr_t)&info, sizeof(info)); info.rti_info[RTAX_DST] = (struct sockaddr *)&in6p->in6p_route.ro_dst; info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; info.rti_info[RTAX_NETMASK] = rt_mask(rt); rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); if (rt->rt_flags & RTF_DYNAMIC) { (void)rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, rt_mask(rt), rt->rt_flags, (struct rtentry **)0); } else { /* * A new route can be allocated * the next time output is attempted. */ rtfree(rt); } } } /* * After a routing change, flush old routing * and allocate a (hopefully) better one. */ void in6_rtchange(in6p, errno) struct in6pcb *in6p; int errno; { if (in6p->in6p_route.ro_rt) { rtfree(in6p->in6p_route.ro_rt); in6p->in6p_route.ro_rt = 0; /* * A new route can be allocated the next time * output is attempted. */ } } struct in6pcb * in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) struct in6pcb *head; struct in6_addr *faddr6, *laddr6; u_int fport_arg, lport_arg; int flags; { struct in6pcb *in6p, *match = 0; int matchwild = 3, wildcard; u_int16_t fport = fport_arg, lport = lport_arg; for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { if (in6p->in6p_lport != lport) continue; wildcard = 0; if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) wildcard++; else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) continue; } else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && in6p->in6p_laddr.s6_addr32[3] == 0) { if (!IN6_IS_ADDR_V4MAPPED(laddr6)) continue; if (laddr6->s6_addr32[3] == 0) ; else wildcard++; } else { if (IN6_IS_ADDR_V4MAPPED(laddr6)) { if (in6p->in6p_flags & IN6P_IPV6_V6ONLY) continue; else wildcard++; } else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) wildcard++; } if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { if (IN6_IS_ADDR_UNSPECIFIED(faddr6)) wildcard++; else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) || in6p->in6p_fport != fport) continue; } else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && in6p->in6p_faddr.s6_addr32[3] == 0) { if (!IN6_IS_ADDR_V4MAPPED(faddr6)) continue; if (faddr6->s6_addr32[3] == 0) ; else wildcard++; } else { if (IN6_IS_ADDR_V4MAPPED(faddr6)) { if (in6p->in6p_flags & IN6P_IPV6_V6ONLY) continue; else wildcard++; } else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6)) wildcard++; } if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) continue; if (wildcard < matchwild) { match = in6p; matchwild = wildcard; if (matchwild == 0) break; } } return (match); } struct rtentry * in6_pcbrtentry(in6p) struct in6pcb *in6p; { struct route_in6 *ro; struct sockaddr_in6 *dst6; ro = &in6p->in6p_route; dst6 = (struct sockaddr_in6 *)&ro->ro_dst; if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || !IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, &in6p->in6p_faddr))) { RTFREE(ro->ro_rt); ro->ro_rt = (struct rtentry *)NULL; } if (ro->ro_rt == (struct rtentry *)NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { bzero(dst6, sizeof(*dst6)); dst6->sin6_family = AF_INET6; dst6->sin6_len = sizeof(struct sockaddr_in6); dst6->sin6_addr = in6p->in6p_faddr; rtalloc((struct route *)ro); } return (ro->ro_rt); } struct in6pcb * in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) struct in6pcb *head; struct in6_addr *faddr6, *laddr6; u_int fport_arg, lport_arg; int faith; { struct in6pcb *in6p; u_int16_t fport = fport_arg, lport = lport_arg; for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { /* find exact match on both source and dest */ if (in6p->in6p_fport != fport) continue; if (in6p->in6p_lport != lport) continue; if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) continue; if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) continue; if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) continue; if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) continue; if ((IN6_IS_ADDR_V4MAPPED(laddr6) || IN6_IS_ADDR_V4MAPPED(faddr6)) && (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) continue; return in6p; } return NULL; } struct in6pcb * in6_pcblookup_bind(head, laddr6, lport_arg, faith) struct in6pcb *head; struct in6_addr *laddr6; u_int lport_arg; int faith; { struct in6pcb *in6p, *match; u_int16_t lport = lport_arg; match = NULL; for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { /* * find destination match. exact match is preferred * against wildcard match. */ if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) continue; if (in6p->in6p_fport != 0) continue; if (in6p->in6p_lport != lport) continue; if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { if (IN6_IS_ADDR_V4MAPPED(laddr6)) { if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY)) continue; else match = in6p; } else match = in6p; } else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && !(in6p->in6p_flags & IN6P_IPV6_V6ONLY) && in6p->in6p_laddr.s6_addr32[3] == 0) { if (IN6_IS_ADDR_V4MAPPED(laddr6) && laddr6->s6_addr32[3] != 0) match = in6p; } else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) return in6p; } return match; }