/* $NetBSD: in6_pcb.c,v 1.22 2000/05/29 00:03:18 itojun Exp $ */ /* $KAME: in6_pcb.c,v 1.43 2000/05/28 23:25:07 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 "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 #include #endif /* IPSEC */ struct in6_addr zeroin6_addr; int in6_pcballoc(so, head) struct socket *so; struct in6pcb *head; { struct in6pcb *in6p; 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; in6p->in6p_next = head->in6p_next; head->in6p_next = in6p; in6p->in6p_prev = head; in6p->in6p_next->in6p_prev = in6p; #ifndef INET6_BINDV6ONLY if (ip6_bindv6only) in6p->in6p_flags |= IN6P_BINDV6ONLY; #else in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/ #endif so->so_pcb = (caddr_t)in6p; return(0); } int in6_pcbbind(in6p, nam) register struct in6pcb *in6p; struct mbuf *nam; { struct socket *so = in6p->in6p_socket; struct in6pcb *head = in6p->in6p_head; struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; struct proc *p = curproc; /* XXX */ u_int16_t lport = 0; int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); int error; 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 make normal * user to hijack port number from other users. */ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) return(EADDRNOTAVAIL); /* * If the scope of the destination is link-local, embed the * interface index in the address. */ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { /* XXX boundary check is assumed to be already done. */ /* XXX sin6_scope_id is weaker than advanced-api. */ struct in6_pktinfo *pi; if (in6p->in6p_outputopts && (pi = in6p->in6p_outputopts->ip6po_pktinfo) && pi->ipi6_ifindex) { sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && in6p->in6p_moptions && in6p->in6p_moptions->im6o_multicast_ifp) { sin6->sin6_addr.s6_addr16[1] = htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); } else if (sin6->sin6_scope_id) { /* boundary check */ if (sin6->sin6_scope_id < 0 || if_index < sin6->sin6_scope_id) { return ENXIO; /* XXX EINVAL? */ } sin6->sin6_addr.s6_addr16[1] = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ /* 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 defined(NFAITH) && NFAITH > 0 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) #else if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) #endif return(EADDRNOTAVAIL); /* * XXX: bind to an anycast address might accidentally * cause sending a packet with anycast source address. */ if (ia && ((struct in6_ifaddr *)ia)->ia6_flags & (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { return(EADDRNOTAVAIL); } } if (lport) { #ifndef IPNOPRIVPORTS /* GROSS */ if (ntohs(lport) < IPV6PORT_RESERVED && (p == 0 || (error = suser(p->p_ucred, &p->p_acflag)))) 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)) != 0) return(e); } else in6p->in6p_lport = lport; in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ return(0); } /* * Find an empty port and set it to the specified PCB. */ int in6_pcbsetport(laddr, in6p) struct in6_addr *laddr; struct in6pcb *in6p; { struct socket *so = in6p->in6p_socket; struct in6pcb *head = in6p->in6p_head; u_int16_t last_port, lport = 0; int wild = 0; void *t; u_int16_t min, max; #ifndef IPNOPRIVPORTS struct proc *p = curproc; /*XXX*/ #endif /* XXX: this is redundant when called from in6_pcbbind */ 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 (in6p->in6p_flags & IN6P_LOWPORT) { #ifndef IPNOPRIVPORTS if (p == 0 || (suser(p->p_ucred, &p->p_acflag) != 0)) return (EACCES); #endif min = IPV6PORT_RESERVEDMIN; max = IPV6PORT_RESERVEDMAX; } else { min = IPV6PORT_ANONMIN; max = IPV6PORT_ANONMAX; } /* value out of range */ if (head->in6p_lport < min) head->in6p_lport = min; else if (head->in6p_lport > max) head->in6p_lport = min; last_port = head->in6p_lport; goto startover; /*to randomize*/ for (;;) { lport = htons(head->in6p_lport); if (IN6_IS_ADDR_V4MAPPED(laddr)) { #if 0 t = in_pcblookup_bind(&tcbtable, (struct in_addr *)&in6p->in6p_laddr.s6_addr32[3], lport); #else t = NULL; #endif } else { t = in6_pcblookup(head, &zeroin6_addr, 0, laddr, lport, wild); } if (t == 0) break; startover: if (head->in6p_lport >= max) head->in6p_lport = min; else head->in6p_lport++; if (head->in6p_lport == last_port) return (EADDRINUSE); } in6p->in6p_lport = lport; return(0); /* success */ } /* * 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 in6_pktinfo *pi; struct ifnet *ifp = NULL; /* outgoing interface */ int error = 0; struct in6_addr mapped; (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 (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; } /* * If the scope of the destination is link-local, embed the interface * index in the address. */ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { /* XXX boundary check is assumed to be already done. */ /* XXX sin6_scope_id is weaker than advanced-api. */ if (in6p->in6p_outputopts && (pi = in6p->in6p_outputopts->ip6po_pktinfo) && pi->ipi6_ifindex) { sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); ifp = ifindex2ifnet[pi->ipi6_ifindex]; } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && in6p->in6p_moptions && in6p->in6p_moptions->im6o_multicast_ifp) { sin6->sin6_addr.s6_addr16[1] = htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; } else if (sin6->sin6_scope_id) { /* boundary check */ if (sin6->sin6_scope_id < 0 || if_index < sin6->sin6_scope_id) { return ENXIO; /* XXX EINVAL? */ } sin6->sin6_addr.s6_addr16[1] = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ ifp = ifindex2ifnet[sin6->sin6_scope_id]; } } /* Source address selection. */ if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && in6p->in6p_laddr.s6_addr32[3] == 0) { 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 { /* * 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)) { if (in6p->in6p_lport == 0) (void)in6_pcbbind(in6p, (struct mbuf *)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; return(0); } /* * Return an IPv6 address, which is the most appropriate for given * destination and user specified options. * If necessary, this function lookups the routing table and return * an entry to the caller for later use. */ struct in6_addr * in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp) struct sockaddr_in6 *dstsock; struct ip6_pktopts *opts; struct ip6_moptions *mopts; struct route_in6 *ro; struct in6_addr *laddr; int *errorp; { struct in6_addr *dst; struct in6_ifaddr *ia6 = 0; struct in6_pktinfo *pi = NULL; dst = &dstsock->sin6_addr; *errorp = 0; /* * If the source address is explicitly specified by the caller, * use it. */ if (opts && (pi = opts->ip6po_pktinfo) && !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) return(&pi->ipi6_addr); /* * If the source address is not specified but the socket(if any) * is already bound, use the bound address. */ if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) return(laddr); /* * If the caller doesn't specify the source address but * the outgoing interface, use an address associated with * the interface. */ if (pi && pi->ipi6_ifindex) { /* XXX boundary check is assumed to be already done. */ ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], dst); if (ia6 == 0) { *errorp = EADDRNOTAVAIL; return(0); } return(&satosin6(&ia6->ia_addr)->sin6_addr); } /* * If the destination address is a link-local unicast address or * a multicast address, and if the outgoing interface is specified * by the sin6_scope_id filed, use an address associated with the * interface. * XXX: We're now trying to define more specific semantics of * sin6_scope_id field, so this part will be rewritten in * the near future. */ if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && dstsock->sin6_scope_id) { /* * I'm not sure if boundary check for scope_id is done * somewhere... */ if (dstsock->sin6_scope_id < 0 || if_index < dstsock->sin6_scope_id) { *errorp = ENXIO; /* XXX: better error? */ return(0); } ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], dst); if (ia6 == 0) { *errorp = EADDRNOTAVAIL; return(0); } return(&satosin6(&ia6->ia_addr)->sin6_addr); } /* * If the destination address is a multicast address and * the outgoing interface for the address is specified * by the caller, use an address associated with the interface. * There is a sanity check here; if the destination has node-local * scope, the outgoing interfacde should be a loopback address. * Even if the outgoing interface is not specified, we also * choose a loopback interface as the outgoing interface. */ if (IN6_IS_ADDR_MULTICAST(dst)) { struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { ifp = &loif[0]; } if (ifp) { ia6 = in6_ifawithscope(ifp, dst); if (ia6 == 0) { *errorp = EADDRNOTAVAIL; return(0); } return(&satosin6(&ia6->ia_addr)->sin6_addr); } } /* * If the next hop address for the packet is specified * by caller, use an address associated with the route * to the next hop. */ { struct sockaddr_in6 *sin6_next; struct rtentry *rt; if (opts && opts->ip6po_nexthop) { sin6_next = satosin6(opts->ip6po_nexthop); rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); if (rt) { ia6 = in6_ifawithscope(rt->rt_ifp, dst); if (ia6 == 0) ia6 = ifatoia6(rt->rt_ifa); } if (ia6 == 0) { *errorp = EADDRNOTAVAIL; return(0); } return(&satosin6(&ia6->ia_addr)->sin6_addr); } } /* * If route is known or can be allocated now, * our src addr is taken from the i/f, else punt. */ if (ro) { if (ro->ro_rt && !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { RTFREE(ro->ro_rt); ro->ro_rt = (struct rtentry *)0; } if (ro->ro_rt == (struct rtentry *)0 || ro->ro_rt->rt_ifp == (struct ifnet *)0) { /* No route yet, so try to acquire one */ bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); ro->ro_dst.sin6_family = AF_INET6; ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); ro->ro_dst.sin6_addr = *dst; if (IN6_IS_ADDR_MULTICAST(dst)) { ro->ro_rt = rtalloc1(&((struct route *)ro) ->ro_dst, 0); } else { rtalloc((struct route *)ro); } } /* * in_pcbconnect() checks out IFF_LOOPBACK to skip using * the address. But we don't know why it does so. * It is necessary to ensure the scope even for lo0 * so doesn't check out IFF_LOOPBACK. */ if (ro->ro_rt) { ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); if (ia6 == 0) /* xxx scope error ?*/ ia6 = ifatoia6(ro->ro_rt->rt_ifa); } #if 0 /* * xxx The followings are necessary? (kazu) * I don't think so. * It's for SO_DONTROUTE option in IPv4.(jinmei) */ if (ia6 == 0) { struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0}; sin6->sin6_addr = *dst; ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6))); if (ia6 == 0) ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6))); if (ia6 == 0) return(0); return(&satosin6(&ia6->ia_addr)->sin6_addr); } #endif /* 0 */ if (ia6 == 0) { *errorp = EHOSTUNREACH; /* no route */ return(0); } return(&satosin6(&ia6->ia_addr)->sin6_addr); } *errorp = EADDRNOTAVAIL; return(0); } /* * Default hop limit selection. The precedence is as follows: * 1. Hoplimit valued specified via ioctl. * 2. (If the outgoing interface is detected) the current * hop limit of the interface specified by router advertisement. * 3. The system default hoplimit. */ int in6_selecthlim(in6p, ifp) struct in6pcb *in6p; struct ifnet *ifp; { if (in6p && in6p->in6p_hops >= 0) return(in6p->in6p_hops); else if (ifp) return(nd_ifinfo[ifp->if_index].chlim); else return(ip6_defhlim); } 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); } void in6_pcbdetach(in6p) struct in6pcb *in6p; { struct socket *so = in6p->in6p_socket; #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); in6p->in6p_next->in6p_prev = in6p->in6p_prev; in6p->in6p_prev->in6p_next = in6p->in6p_next; in6p->in6p_prev = NULL; 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; sin6->sin6_addr = in6p->in6p_laddr; if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); else sin6->sin6_scope_id = 0; /*XXX*/ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) sin6->sin6_addr.s6_addr16[1] = 0; } 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; sin6->sin6_addr = in6p->in6p_faddr; if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); else sin6->sin6_scope_id = 0; /*XXX*/ if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) sin6->sin6_addr.s6_addr16[1] = 0; } /* * 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. */ int in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) struct in6pcb *head; struct sockaddr *dst; u_int fport_arg, lport_arg; struct in6_addr *laddr6; int cmd; void (*notify) __P((struct in6pcb *, int)); { struct in6pcb *in6p, *nin6p; struct in6_addr faddr6; u_int16_t fport = fport_arg, lport = lport_arg; int errno; int nmatch = 0; void (*notify2) __P((struct in6pcb *, int)); notify2 = NULL; if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) return 0; faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) return 0; /* * 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)laddr6, sizeof(*laddr6)); /* * Keep the old notify function to store a soft error * in each PCB. */ if (cmd == PRC_HOSTDEAD && notify != in6_rtchange) notify2 = notify; notify = in6_rtchange; } if (notify == NULL) return 0; errno = inet6ctlerrmap[cmd]; for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { nin6p = in6p->in6p_next; if (notify == in6_rtchange) { /* * Since a non-connected PCB might have a cached route, * we always call in6_rtchange without matching * the PCB to the src/dst pair. * * XXX: we assume in6_rtchange does not free the PCB. */ if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr, &faddr6)) in6_rtchange(in6p, errno); if (notify2 == NULL) continue; notify = notify2; } /* at this point, we can assume that NOTIFY is not NULL. */ if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) || in6p->in6p_socket == 0 || (lport && in6p->in6p_lport != lport) || (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || (fport && in6p->in6p_fport != fport)) continue; (*notify)(in6p, errno); nmatch++; } return nmatch; } 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; } #ifndef TCP6 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++; } #endif else { if (IN6_IS_ADDR_V4MAPPED(laddr6)) { #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) if (in6p->in6p_flags & IN6P_BINDV6ONLY) continue; else wildcard++; #else continue; #endif } 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; } #ifndef TCP6 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++; } #endif else { if (IN6_IS_ADDR_V4MAPPED(faddr6)) { #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) if (in6p->in6p_flags & IN6P_BINDV6ONLY) continue; else wildcard++; #else continue; #endif } 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); } #ifndef TCP6 struct rtentry * in6_pcbrtentry(in6p) struct in6pcb *in6p; { struct route_in6 *ro; ro = &in6p->in6p_route; if (ro->ro_rt == NULL) { /* * No route yet, so try to acquire one. */ if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { bzero(&ro->ro_dst, sizeof(ro->ro_dst)); ro->ro_dst.sin6_family = AF_INET6; ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); satosin6(&ro->ro_dst)->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) { #if defined(NFAITH) && NFAITH > 0 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) continue; #endif /* 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; 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 defined(NFAITH) && NFAITH > 0 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) continue; #endif 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)) { #ifndef INET6_BINDV6ONLY if (in6p->in6p_flags & IN6P_BINDV6ONLY) continue; else match = in6p; #else continue; #endif } else match = in6p; } else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 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; } #endif