/* $NetBSD: in_pcb.c,v 1.103 2006/07/23 22:06:13 ad 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) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Public Access Networks Corporation ("Panix"). It was developed under * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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, 1995 * 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. 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 8.4 (Berkeley) 5/24/95 */ #include __KERNEL_RCSID(0, "$NetBSD: in_pcb.c,v 1.103 2006/07/23 22:06:13 ad Exp $"); #include "opt_inet.h" #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 #ifdef INET6 #include #include #include #endif #ifdef IPSEC #include #include #elif FAST_IPSEC #include #include #endif /* IPSEC */ struct in_addr zeroin_addr; #define INPCBHASH_PORT(table, lport) \ &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] #define INPCBHASH_BIND(table, laddr, lport) \ &(table)->inpt_bindhashtbl[ \ ((ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_bindhash] #define INPCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ &(table)->inpt_connecthashtbl[ \ ((ntohl((faddr).s_addr) + ntohs(fport)) + \ (ntohl((laddr).s_addr) + ntohs(lport))) & (table)->inpt_connecthash] int anonportmin = IPPORT_ANONMIN; int anonportmax = IPPORT_ANONMAX; int lowportmin = IPPORT_RESERVEDMIN; int lowportmax = IPPORT_RESERVEDMAX; POOL_INIT(inpcb_pool, sizeof(struct inpcb), 0, 0, 0, "inpcbpl", NULL); void in_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) { CIRCLEQ_INIT(&table->inpt_queue); table->inpt_porthashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, M_WAITOK, &table->inpt_porthash); table->inpt_bindhashtbl = hashinit(bindhashsize, HASH_LIST, M_PCB, M_WAITOK, &table->inpt_bindhash); table->inpt_connecthashtbl = hashinit(connecthashsize, HASH_LIST, M_PCB, M_WAITOK, &table->inpt_connecthash); table->inpt_lastlow = IPPORT_RESERVEDMAX; table->inpt_lastport = (u_int16_t)anonportmax; } int in_pcballoc(struct socket *so, void *v) { struct inpcbtable *table = v; struct inpcb *inp; int s; #if defined(IPSEC) || defined(FAST_IPSEC) int error; #endif inp = pool_get(&inpcb_pool, PR_NOWAIT); if (inp == NULL) return (ENOBUFS); bzero((caddr_t)inp, sizeof(*inp)); inp->inp_af = AF_INET; inp->inp_table = table; inp->inp_socket = so; inp->inp_errormtu = -1; #if defined(IPSEC) || defined(FAST_IPSEC) error = ipsec_init_pcbpolicy(so, &inp->inp_sp); if (error != 0) { pool_put(&inpcb_pool, inp); return error; } #endif so->so_pcb = inp; s = splnet(); CIRCLEQ_INSERT_HEAD(&table->inpt_queue, &inp->inp_head, inph_queue); LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, inph_lhash); in_pcbstate(inp, INP_ATTACHED); splx(s); return (0); } int in_pcbbind(void *v, struct mbuf *nam, struct lwp *l) { struct in_ifaddr *ia = NULL; struct inpcb *inp = v; struct socket *so = inp->inp_socket; struct inpcbtable *table = inp->inp_table; struct sockaddr_in *sin; u_int16_t lport = 0; int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); if (inp->inp_af != AF_INET) return (EINVAL); if (TAILQ_FIRST(&in_ifaddrhead) == 0) return (EADDRNOTAVAIL); if (inp->inp_lport || !in_nullhost(inp->inp_laddr)) return (EINVAL); if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) wild = 1; if (nam == 0) goto noname; sin = mtod(nam, struct sockaddr_in *); if (nam->m_len != sizeof (*sin)) return (EINVAL); if (sin->sin_family != AF_INET) return (EAFNOSUPPORT); lport = sin->sin_port; if (IN_MULTICAST(sin->sin_addr.s_addr)) { /* * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; * allow complete 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 (!in_nullhost(sin->sin_addr)) { sin->sin_port = 0; /* yech... */ INADDR_TO_IA(sin->sin_addr, ia); /* check for broadcast addresses */ if (ia == NULL) ia = ifatoia(ifa_ifwithaddr(sintosa(sin))); if (ia == NULL) return (EADDRNOTAVAIL); } if (lport) { struct inpcb *t; #ifdef INET6 struct in6pcb *t6; struct in6_addr mapped; #endif #ifndef IPNOPRIVPORTS /* GROSS */ if (ntohs(lport) < IPPORT_RESERVED && (l == 0 || kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, &l->l_acflag))) return (EACCES); #endif #ifdef INET6 memset(&mapped, 0, sizeof(mapped)); mapped.s6_addr16[5] = 0xffff; memcpy(&mapped.s6_addr32[3], &sin->sin_addr, sizeof(mapped.s6_addr32[3])); t6 = in6_pcblookup_port(table, &mapped, lport, wild); if (t6 && (reuseport & t6->in6p_socket->so_options) == 0) return (EADDRINUSE); #endif if (so->so_uidinfo->ui_uid && !IN_MULTICAST(sin->sin_addr.s_addr)) { t = in_pcblookup_port(table, sin->sin_addr, lport, 1); /* * XXX: investigate ramifications of loosening this * restriction so that as long as both ports have * SO_REUSEPORT allow the bind */ if (t && (!in_nullhost(sin->sin_addr) || !in_nullhost(t->inp_laddr) || (t->inp_socket->so_options & SO_REUSEPORT) == 0) && (so->so_uidinfo->ui_uid != t->inp_socket->so_uidinfo->ui_uid)) { return (EADDRINUSE); } } t = in_pcblookup_port(table, sin->sin_addr, lport, wild); if (t && (reuseport & t->inp_socket->so_options) == 0) return (EADDRINUSE); } inp->inp_laddr = sin->sin_addr; noname: if (lport == 0) { int cnt; u_int16_t mymin, mymax; u_int16_t *lastport; if (inp->inp_flags & INP_LOWPORT) { #ifndef IPNOPRIVPORTS if (l == 0 || kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, &l->l_acflag)) return (EACCES); #endif mymin = lowportmin; mymax = lowportmax; lastport = &table->inpt_lastlow; } else { mymin = anonportmin; mymax = anonportmax; lastport = &table->inpt_lastport; } if (mymin > mymax) { /* sanity check */ u_int16_t swp; swp = mymin; mymin = mymax; mymax = swp; } lport = *lastport - 1; for (cnt = mymax - mymin + 1; cnt; cnt--, lport--) { if (lport < mymin || lport > mymax) lport = mymax; if (!in_pcblookup_port(table, inp->inp_laddr, htons(lport), 1)) goto found; } if (!in_nullhost(inp->inp_laddr)) inp->inp_laddr.s_addr = INADDR_ANY; return (EAGAIN); found: inp->inp_flags |= INP_ANONPORT; *lastport = lport; lport = htons(lport); } inp->inp_lport = lport; LIST_REMOVE(&inp->inp_head, inph_lhash); LIST_INSERT_HEAD(INPCBHASH_PORT(table, inp->inp_lport), &inp->inp_head, inph_lhash); in_pcbstate(inp, INP_BOUND); return (0); } /* * Connect from a socket to a specified address. * Both address and port must be specified in argument sin. * If don't have a local address for this socket yet, * then pick one. */ int in_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) { struct inpcb *inp = v; struct in_ifaddr *ia = NULL; struct sockaddr_in *ifaddr = NULL; struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); int error; if (inp->inp_af != AF_INET) return (EINVAL); if (nam->m_len != sizeof (*sin)) return (EINVAL); if (sin->sin_family != AF_INET) return (EAFNOSUPPORT); if (sin->sin_port == 0) return (EADDRNOTAVAIL); if (TAILQ_FIRST(&in_ifaddrhead) != 0) { /* * If the destination address is INADDR_ANY, * use any local address (likely loopback). * If the supplied address is INADDR_BROADCAST, * use the broadcast address of an interface * which supports broadcast. (loopback does not) */ if (in_nullhost(sin->sin_addr)) { sin->sin_addr = TAILQ_FIRST(&in_ifaddrhead)->ia_addr.sin_addr; } else if (sin->sin_addr.s_addr == INADDR_BROADCAST) { TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { if (ia->ia_ifp->if_flags & IFF_BROADCAST) { sin->sin_addr = ia->ia_broadaddr.sin_addr; break; } } } } /* * If we haven't bound which network number to use as ours, * we will use the number of the outgoing interface. * This depends on having done a routing lookup, which * we will probably have to do anyway, so we might * as well do it now. On the other hand if we are * sending to multiple destinations we may have already * done the lookup, so see if we can use the route * from before. In any case, we only * chose a port number once, even if sending to multiple * destinations. */ if (in_nullhost(inp->inp_laddr)) { int xerror; ifaddr = in_selectsrc(sin, &inp->inp_route, inp->inp_socket->so_options, inp->inp_moptions, &xerror); if (ifaddr == NULL) { if (xerror == 0) xerror = EADDRNOTAVAIL; return xerror; } INADDR_TO_IA(ifaddr->sin_addr, ia); if (ia == NULL) return (EADDRNOTAVAIL); } if (in_pcblookup_connect(inp->inp_table, sin->sin_addr, sin->sin_port, !in_nullhost(inp->inp_laddr) ? inp->inp_laddr : ifaddr->sin_addr, inp->inp_lport) != 0) return (EADDRINUSE); if (in_nullhost(inp->inp_laddr)) { if (inp->inp_lport == 0) { error = in_pcbbind(inp, NULL, l); /* * This used to ignore the return value * completely, but we need to check for * ephemeral port shortage. * And attempts to request low ports if not root. */ if (error != 0) return (error); } inp->inp_laddr = ifaddr->sin_addr; } inp->inp_faddr = sin->sin_addr; inp->inp_fport = sin->sin_port; in_pcbstate(inp, INP_CONNECTED); #if defined(IPSEC) || defined(FAST_IPSEC) if (inp->inp_socket->so_type == SOCK_STREAM) ipsec_pcbconn(inp->inp_sp); #endif return (0); } void in_pcbdisconnect(void *v) { struct inpcb *inp = v; if (inp->inp_af != AF_INET) return; inp->inp_faddr = zeroin_addr; inp->inp_fport = 0; in_pcbstate(inp, INP_BOUND); #if defined(IPSEC) || defined(FAST_IPSEC) ipsec_pcbdisconn(inp->inp_sp); #endif if (inp->inp_socket->so_state & SS_NOFDREF) in_pcbdetach(inp); } void in_pcbdetach(void *v) { struct inpcb *inp = v; struct socket *so = inp->inp_socket; int s; if (inp->inp_af != AF_INET) return; #if defined(IPSEC) || defined(FAST_IPSEC) ipsec4_delete_pcbpolicy(inp); #endif /*IPSEC*/ so->so_pcb = 0; sofree(so); if (inp->inp_options) (void)m_free(inp->inp_options); if (inp->inp_route.ro_rt) rtfree(inp->inp_route.ro_rt); ip_freemoptions(inp->inp_moptions); s = splnet(); in_pcbstate(inp, INP_ATTACHED); LIST_REMOVE(&inp->inp_head, inph_lhash); CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, &inp->inp_head, inph_queue); splx(s); pool_put(&inpcb_pool, inp); } void in_setsockaddr(struct inpcb *inp, struct mbuf *nam) { struct sockaddr_in *sin; if (inp->inp_af != AF_INET) return; nam->m_len = sizeof (*sin); sin = mtod(nam, struct sockaddr_in *); bzero((caddr_t)sin, sizeof (*sin)); sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); sin->sin_port = inp->inp_lport; sin->sin_addr = inp->inp_laddr; } void in_setpeeraddr(struct inpcb *inp, struct mbuf *nam) { struct sockaddr_in *sin; if (inp->inp_af != AF_INET) return; nam->m_len = sizeof (*sin); sin = mtod(nam, struct sockaddr_in *); bzero((caddr_t)sin, sizeof (*sin)); sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); sin->sin_port = inp->inp_fport; sin->sin_addr = inp->inp_faddr; } /* * 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 in_pcbnotify(struct inpcbtable *table, struct in_addr faddr, u_int fport_arg, struct in_addr laddr, u_int lport_arg, int errno, void (*notify)(struct inpcb *, int)) { struct inpcbhead *head; struct inpcb *inp, *ninp; u_int16_t fport = fport_arg, lport = lport_arg; int nmatch; if (in_nullhost(faddr) || notify == 0) return (0); nmatch = 0; head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); for (inp = (struct inpcb *)LIST_FIRST(head); inp != NULL; inp = ninp) { ninp = (struct inpcb *)LIST_NEXT(inp, inp_hash); if (inp->inp_af != AF_INET) continue; if (in_hosteq(inp->inp_faddr, faddr) && inp->inp_fport == fport && inp->inp_lport == lport && in_hosteq(inp->inp_laddr, laddr)) { (*notify)(inp, errno); nmatch++; } } return (nmatch); } void in_pcbnotifyall(struct inpcbtable *table, struct in_addr faddr, int errno, void (*notify)(struct inpcb *, int)) { struct inpcb *inp, *ninp; if (in_nullhost(faddr) || notify == 0) return; for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); inp != (void *)&table->inpt_queue; inp = ninp) { ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); if (inp->inp_af != AF_INET) continue; if (in_hosteq(inp->inp_faddr, faddr)) (*notify)(inp, errno); } } void in_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) { struct inpcb *inp, *ninp; struct ip_moptions *imo; int i, gap; for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); inp != (void *)&table->inpt_queue; inp = ninp) { ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); if (inp->inp_af != AF_INET) continue; imo = inp->inp_moptions; if (imo != NULL) { /* * Unselect the outgoing interface if it is being * detached. */ if (imo->imo_multicast_ifp == ifp) imo->imo_multicast_ifp = NULL; /* * Drop multicast group membership if we joined * through the interface being detached. */ for (i = 0, gap = 0; i < imo->imo_num_memberships; i++) { if (imo->imo_membership[i]->inm_ifp == ifp) { in_delmulti(imo->imo_membership[i]); gap++; } else if (gap != 0) imo->imo_membership[i - gap] = imo->imo_membership[i]; } imo->imo_num_memberships -= gap; } } } void in_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) { struct inpcb *inp, *ninp; for (inp = (struct inpcb *)CIRCLEQ_FIRST(&table->inpt_queue); inp != (void *)&table->inpt_queue; inp = ninp) { ninp = (struct inpcb *)CIRCLEQ_NEXT(inp, inp_queue); if (inp->inp_af != AF_INET) continue; if (inp->inp_route.ro_rt != NULL && inp->inp_route.ro_rt->rt_ifp == ifp) in_rtchange(inp, 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 in_losing(struct inpcb *inp) { struct rtentry *rt; struct rt_addrinfo info; if (inp->inp_af != AF_INET) return; if ((rt = inp->inp_route.ro_rt)) { inp->inp_route.ro_rt = 0; bzero((caddr_t)&info, sizeof(info)); info.rti_info[RTAX_DST] = &inp->inp_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 in_rtchange(struct inpcb *inp, int errno) { if (inp->inp_af != AF_INET) return; if (inp->inp_route.ro_rt) { rtfree(inp->inp_route.ro_rt); inp->inp_route.ro_rt = 0; /* * A new route can be allocated the next time * output is attempted. */ } /* XXX SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ } struct inpcb * in_pcblookup_port(struct inpcbtable *table, struct in_addr laddr, u_int lport_arg, int lookup_wildcard) { struct inpcbhead *head; struct inpcb_hdr *inph; struct inpcb *inp, *match = 0; int matchwild = 3, wildcard; u_int16_t lport = lport_arg; head = INPCBHASH_PORT(table, lport); LIST_FOREACH(inph, head, inph_lhash) { inp = (struct inpcb *)inph; if (inp->inp_af != AF_INET) continue; if (inp->inp_lport != lport) continue; wildcard = 0; if (!in_nullhost(inp->inp_faddr)) wildcard++; if (in_nullhost(inp->inp_laddr)) { if (!in_nullhost(laddr)) wildcard++; } else { if (in_nullhost(laddr)) wildcard++; else { if (!in_hosteq(inp->inp_laddr, laddr)) continue; } } if (wildcard && !lookup_wildcard) continue; if (wildcard < matchwild) { match = inp; matchwild = wildcard; if (matchwild == 0) break; } } return (match); } #ifdef DIAGNOSTIC int in_pcbnotifymiss = 0; #endif struct inpcb * in_pcblookup_connect(struct inpcbtable *table, struct in_addr faddr, u_int fport_arg, struct in_addr laddr, u_int lport_arg) { struct inpcbhead *head; struct inpcb_hdr *inph; struct inpcb *inp; u_int16_t fport = fport_arg, lport = lport_arg; head = INPCBHASH_CONNECT(table, faddr, fport, laddr, lport); LIST_FOREACH(inph, head, inph_hash) { inp = (struct inpcb *)inph; if (inp->inp_af != AF_INET) continue; if (in_hosteq(inp->inp_faddr, faddr) && inp->inp_fport == fport && inp->inp_lport == lport && in_hosteq(inp->inp_laddr, laddr)) goto out; } #ifdef DIAGNOSTIC if (in_pcbnotifymiss) { printf("in_pcblookup_connect: faddr=%08x fport=%d laddr=%08x lport=%d\n", ntohl(faddr.s_addr), ntohs(fport), ntohl(laddr.s_addr), ntohs(lport)); } #endif return (0); out: /* Move this PCB to the head of hash chain. */ inph = &inp->inp_head; if (inph != LIST_FIRST(head)) { LIST_REMOVE(inph, inph_hash); LIST_INSERT_HEAD(head, inph, inph_hash); } return (inp); } struct inpcb * in_pcblookup_bind(struct inpcbtable *table, struct in_addr laddr, u_int lport_arg) { struct inpcbhead *head; struct inpcb_hdr *inph; struct inpcb *inp; u_int16_t lport = lport_arg; head = INPCBHASH_BIND(table, laddr, lport); LIST_FOREACH(inph, head, inph_hash) { inp = (struct inpcb *)inph; if (inp->inp_af != AF_INET) continue; if (inp->inp_lport == lport && in_hosteq(inp->inp_laddr, laddr)) goto out; } head = INPCBHASH_BIND(table, zeroin_addr, lport); LIST_FOREACH(inph, head, inph_hash) { inp = (struct inpcb *)inph; if (inp->inp_af != AF_INET) continue; if (inp->inp_lport == lport && in_hosteq(inp->inp_laddr, zeroin_addr)) goto out; } #ifdef DIAGNOSTIC if (in_pcbnotifymiss) { printf("in_pcblookup_bind: laddr=%08x lport=%d\n", ntohl(laddr.s_addr), ntohs(lport)); } #endif return (0); out: /* Move this PCB to the head of hash chain. */ inph = &inp->inp_head; if (inph != LIST_FIRST(head)) { LIST_REMOVE(inph, inph_hash); LIST_INSERT_HEAD(head, inph, inph_hash); } return (inp); } void in_pcbstate(struct inpcb *inp, int state) { if (inp->inp_af != AF_INET) return; if (inp->inp_state > INP_ATTACHED) LIST_REMOVE(&inp->inp_head, inph_hash); switch (state) { case INP_BOUND: LIST_INSERT_HEAD(INPCBHASH_BIND(inp->inp_table, inp->inp_laddr, inp->inp_lport), &inp->inp_head, inph_hash); break; case INP_CONNECTED: LIST_INSERT_HEAD(INPCBHASH_CONNECT(inp->inp_table, inp->inp_faddr, inp->inp_fport, inp->inp_laddr, inp->inp_lport), &inp->inp_head, inph_hash); break; } inp->inp_state = state; } struct rtentry * in_pcbrtentry(struct inpcb *inp) { struct route *ro; if (inp->inp_af != AF_INET) return (NULL); ro = &inp->inp_route; if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || !in_hosteq(satosin(&ro->ro_dst)->sin_addr, inp->inp_faddr))) { RTFREE(ro->ro_rt); ro->ro_rt = (struct rtentry *)NULL; } if (ro->ro_rt == (struct rtentry *)NULL && !in_nullhost(inp->inp_faddr)) { bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); ro->ro_dst.sa_family = AF_INET; ro->ro_dst.sa_len = sizeof(ro->ro_dst); satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr; rtalloc(ro); } return (ro->ro_rt); } struct sockaddr_in * in_selectsrc(struct sockaddr_in *sin, struct route *ro, int soopts, struct ip_moptions *mopts, int *errorp) { struct in_ifaddr *ia; ia = (struct in_ifaddr *)0; /* * If route is known or can be allocated now, * our src addr is taken from the i/f, else punt. * Note that we should check the address family of the cached * destination, in case of sharing the cache with IPv6. */ if (ro->ro_rt && (ro->ro_dst.sa_family != AF_INET || !in_hosteq(satosin(&ro->ro_dst)->sin_addr, sin->sin_addr) || soopts & SO_DONTROUTE)) { RTFREE(ro->ro_rt); ro->ro_rt = (struct rtentry *)0; } if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/ (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_in)); ro->ro_dst.sa_family = AF_INET; ro->ro_dst.sa_len = sizeof(struct sockaddr_in); satosin(&ro->ro_dst)->sin_addr = sin->sin_addr; rtalloc(ro); } /* * If we found a route, use the address * corresponding to the outgoing interface * unless it is the loopback (in case a route * to our address on another net goes to loopback). * * XXX Is this still true? Do we care? */ if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) ia = ifatoia(ro->ro_rt->rt_ifa); if (ia == NULL) { u_int16_t fport = sin->sin_port; sin->sin_port = 0; ia = ifatoia(ifa_ifwithladdr(sintosa(sin))); sin->sin_port = fport; if (ia == 0) { /* Find 1st non-loopback AF_INET address */ TAILQ_FOREACH(ia, &in_ifaddrhead, ia_list) { if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) break; } } if (ia == NULL) { *errorp = EADDRNOTAVAIL; return NULL; } } /* * If the destination address is multicast and an outgoing * interface has been set as a multicast option, use the * address of that interface as our source address. */ if (IN_MULTICAST(sin->sin_addr.s_addr) && mopts != NULL) { struct ip_moptions *imo; struct ifnet *ifp; imo = mopts; if (imo->imo_multicast_ifp != NULL) { ifp = imo->imo_multicast_ifp; IFP_TO_IA(ifp, ia); /* XXX */ if (ia == 0) { *errorp = EADDRNOTAVAIL; return NULL; } } } return satosin(&ia->ia_addr); }