in6_pcb.c revision 56117
1139823Simp/* 298943Sluigi * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 398943Sluigi * All rights reserved. 498943Sluigi * 598943Sluigi * Redistribution and use in source and binary forms, with or without 698943Sluigi * modification, are permitted provided that the following conditions 798943Sluigi * are met: 898943Sluigi * 1. Redistributions of source code must retain the above copyright 9116763Sluigi * notice, this list of conditions and the following disclaimer. 1098943Sluigi * 2. Redistributions in binary form must reproduce the above copyright 1198943Sluigi * notice, this list of conditions and the following disclaimer in the 12105775Smaxim * documentation and/or other materials provided with the distribution. 1398943Sluigi * 3. Neither the name of the project nor the names of its contributors 1498943Sluigi * may be used to endorse or promote products derived from this software 1598943Sluigi * without specific prior written permission. 1698943Sluigi * 1798943Sluigi * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1898943Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1998943Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2098943Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2198943Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2298943Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2398943Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2498943Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2598943Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26172467Ssilby * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27172467Ssilby * SUCH DAMAGE. 28172467Ssilby * 2998943Sluigi * $FreeBSD: head/sys/netinet6/in6_pcb.c 56117 2000-01-16 18:00:06Z shin $ 3098943Sluigi */ 3198943Sluigi 3298943Sluigi/* 3399622Sluigi * Copyright (c) 1982, 1986, 1991, 1993 3498943Sluigi * The Regents of the University of California. All rights reserved. 3598943Sluigi * 36134346Sru * Redistribution and use in source and binary forms, with or without 3798943Sluigi * modification, are permitted provided that the following conditions 38166479Salc * are met: 3998943Sluigi * 1. Redistributions of source code must retain the above copyright 4098943Sluigi * notice, this list of conditions and the following disclaimer. 4198943Sluigi * 2. Redistributions in binary form must reproduce the above copyright 4298943Sluigi * notice, this list of conditions and the following disclaimer in the 4398943Sluigi * documentation and/or other materials provided with the distribution. 44134346Sru * 3. All advertising materials mentioning features or use of this software 45152928Sume * must display the following acknowledgement: 46152928Sume * This product includes software developed by the University of 4798943Sluigi * California, Berkeley and its contributors. 4898943Sluigi * 4. Neither the name of the University nor the names of its contributors 4998943Sluigi * may be used to endorse or promote products derived from this software 50138642Scsjp * without specific prior written permission. 51165648Spiso * 5298943Sluigi * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5398943Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5498943Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55155201Scsjp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56133600Scsjp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57129876Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58164033Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5998943Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60155201Scsjp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6198943Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6298943Sluigi * SUCH DAMAGE. 6398943Sluigi * 6498943Sluigi * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 6598943Sluigi * $FreeBSD: head/sys/netinet6/in6_pcb.c 56117 2000-01-16 18:00:06Z shin $ 66188676Sluigi */ 6798943Sluigi 68130281Sru#include "opt_ipsec.h" 6998943Sluigi 70171173Smlaier#include <sys/param.h> 71185571Sbz#include <sys/systm.h> 72175659Srwatson#include <sys/malloc.h> 73175659Srwatson#include <sys/mbuf.h> 74175659Srwatson#include <sys/domain.h> 7598943Sluigi#include <sys/protosw.h> 7698943Sluigi#include <sys/socket.h> 7798943Sluigi#include <sys/socketvar.h> 7898943Sluigi#include <sys/sockio.h> 7998943Sluigi#include <sys/errno.h> 8098943Sluigi#include <sys/time.h> 8198943Sluigi#include <sys/proc.h> 82126239Smlaier#include <sys/jail.h> 8398943Sluigi 84163069Sbz#include <vm/vm_zone.h> 85161767Sjhay 8698943Sluigi#include <net/if.h> 8798943Sluigi#include <net/if_types.h> 8898943Sluigi#include <net/route.h> 89164258Sbz 90185571Sbz#include <netinet/in.h> 91141351Sglebius#include <netinet/in_var.h> 92141351Sglebius#include <netinet/in_systm.h> 93145246Sbrooks#include <netinet6/ip6.h> 94145246Sbrooks#include <netinet/ip_var.h> 95148414Sume#include <netinet6/ip6_var.h> 96148414Sume#include <netinet6/nd6.h> 97200027Sume#include <netinet/in_pcb.h> 98148414Sume#include <netinet6/in6_pcb.h> 99145246Sbrooks 10099475Sluigi#include "faith.h" 10199475Sluigi 102188580Sluigi#ifdef IPSEC 103163606Srwatson#include <netinet6/ipsec.h> 104188580Sluigi#include <netinet6/ah.h> 105163606Srwatson#include <netinet6/ipsec6.h> 106196423Sjulian#include <netinet6/ah6.h> 107196423Sjulian#include <netkey/key.h> 108101628Sluigi#ifdef IPSEC_DEBUG 109101628Sluigi#include <netkey/key_debug.h> 110101628Sluigi#else 111117654Sluigi#define KEYDEBUG(lev,arg) 112117654Sluigi#endif /* IPSEC_DEBUG */ 113101628Sluigi#endif /* IPSEC */ 114117654Sluigi 115101628Sluigistruct in6_addr zeroin6_addr; 116195699Srwatson 117195699Srwatsonint 118195699Srwatsonin6_pcbbind(inp, nam, p) 119195699Srwatson register struct inpcb *inp; 12098943Sluigi struct sockaddr *nam; 121195727Srwatson struct proc *p; 122195727Srwatson{ 123195727Srwatson struct socket *so = inp->inp_socket; 124195727Srwatson unsigned short *lastport; 125195699Srwatson struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 126191932Sjhb struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 127191932Sjhb u_short lport = 0; 128191932Sjhb int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 129191932Sjhb int error; 130191932Sjhb 131141076Scsjp if (!in6_ifaddr) /* XXX broken! */ 13298943Sluigi return (EADDRNOTAVAIL); 133193859Soleg if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 134193859Soleg return(EINVAL); 135130363Scsjp if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 13698943Sluigi wild = 1; 13798943Sluigi if (nam) { 138195699Srwatson sin6 = (struct sockaddr_in6 *)nam; 13998943Sluigi if (nam->sa_len != sizeof(*sin6)) 14098943Sluigi return(EINVAL); 141130281Sru /* 142176669Spiso * family check. 143176669Spiso */ 144176669Spiso if (nam->sa_family != AF_INET6) 145176669Spiso return(EAFNOSUPPORT); 146176669Spiso 147176669Spiso /* 14898943Sluigi * If the scope of the destination is link-local, embed the 149130281Sru * interface index in the address. 150130281Sru */ 151130281Sru if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 152130281Sru /* XXX boundary check is assumed to be already done. */ 153130281Sru /* XXX sin6_scope_id is weaker than advanced-api. */ 154130281Sru struct in6_pktinfo *pi; 155195699Srwatson if (inp->in6p_outputopts && 156195727Srwatson (pi = inp->in6p_outputopts->ip6po_pktinfo) && 157195862Sjulian pi->ipi6_ifindex) { 158195862Sjulian sin6->sin6_addr.s6_addr16[1] 15998943Sluigi = htons(pi->ipi6_ifindex); 160158470Smlaier } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 161158470Smlaier && inp->in6p_moptions 16298943Sluigi && inp->in6p_moptions->im6o_multicast_ifp) { 16398943Sluigi sin6->sin6_addr.s6_addr16[1] = 164195699Srwatson htons(inp->in6p_moptions->im6o_multicast_ifp->if_index); 165195699Srwatson } else if (sin6->sin6_scope_id) { 166158470Smlaier /* boundary check */ 167195699Srwatson if (sin6->sin6_scope_id < 0 168195862Sjulian || if_index < sin6->sin6_scope_id) { 169195862Sjulian return ENXIO; /* XXX EINVAL? */ 170195699Srwatson } 171195699Srwatson sin6->sin6_addr.s6_addr16[1] 17298943Sluigi = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 173195699Srwatson /* this must be cleared for ifa_ifwithaddr() */ 174195862Sjulian sin6->sin6_scope_id = 0; 175195862Sjulian } 176195699Srwatson } 177195699Srwatson 178186048Sbz lport = sin6->sin6_port; 179182818Srik if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 180195862Sjulian /* 181195862Sjulian * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 182183015Srik * allow compepte duplication of binding if 183195862Sjulian * SO_REUSEPORT is set, or if SO_REUSEADDR is set 184195862Sjulian * and a multicast address is bound on both 185191932Sjhb * new and duplicated sockets. 186195862Sjulian */ 187195862Sjulian if (so->so_options & SO_REUSEADDR) 188191932Sjhb reuseport = SO_REUSEADDR|SO_REUSEPORT; 189200040Sluigi } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 190195862Sjulian struct ifaddr *ia = NULL; 191195862Sjulian 192195862Sjulian sin6->sin6_port = 0; /* yech... */ 193195862Sjulian if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 194195862Sjulian return(EADDRNOTAVAIL); 195195862Sjulian 196195862Sjulian /* 197195862Sjulian * XXX: bind to an anycast address might accidentally 198195862Sjulian * cause sending a packet with anycast source address. 199200040Sluigi */ 20098943Sluigi if (ia && 201200040Sluigi ((struct in6_ifaddr *)ia)->ia6_flags & 202200040Sluigi (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 20398943Sluigi IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 20498943Sluigi return(EADDRNOTAVAIL); 20598943Sluigi } 20698943Sluigi } 20798943Sluigi if (lport) { 20898943Sluigi struct inpcb *t; 20998943Sluigi 21098943Sluigi /* GROSS */ 21198943Sluigi if (ntohs(lport) < IPV6PORT_RESERVED && p && 21298943Sluigi suser_xxx(0, p, PRISON_ROOT)) 21398943Sluigi return(EACCES); 21498943Sluigi if (so->so_cred->cr_uid != 0 && 21598943Sluigi !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 21698943Sluigi t = in6_pcblookup_local(pcbinfo, 21798943Sluigi &sin6->sin6_addr, lport, 21898943Sluigi INPLOOKUP_WILDCARD); 21998943Sluigi if (t && 22098943Sluigi (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 22198943Sluigi !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 22298943Sluigi (t->inp_socket->so_options & 22398943Sluigi SO_REUSEPORT) == 0) && 22498943Sluigi (so->so_cred->cr_uid != 22598943Sluigi t->inp_socket->so_cred->cr_uid)) 22698943Sluigi return (EADDRINUSE); 22798943Sluigi if (ip6_mapped_addr_on != 0 && 22898943Sluigi IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 22998943Sluigi struct sockaddr_in sin; 23098943Sluigi 23198943Sluigi in6_sin6_2_sin(&sin, sin6); 23298943Sluigi t = in_pcblookup_local(pcbinfo, 23398943Sluigi sin.sin_addr, lport, 23498943Sluigi INPLOOKUP_WILDCARD); 23598943Sluigi if (t && 23698943Sluigi (so->so_cred->cr_uid != 23798943Sluigi t->inp_socket->so_cred->cr_uid) && 23898943Sluigi (ntohl(t->inp_laddr.s_addr) != 239195699Srwatson INADDR_ANY || 240195699Srwatson INP_SOCKAF(so) == 241195699Srwatson INP_SOCKAF(t->inp_socket))) 24298943Sluigi return (EADDRINUSE); 243195727Srwatson } 244195727Srwatson } 245195727Srwatson t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 246195699Srwatson lport, wild); 247120141Ssam if (t && (reuseport & t->inp_socket->so_options) == 0) 248120141Ssam return(EADDRINUSE); 249120141Ssam if (ip6_mapped_addr_on != 0 && 250120141Ssam IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 251120141Ssam struct sockaddr_in sin; 252120141Ssam 253120141Ssam in6_sin6_2_sin(&sin, sin6); 254120141Ssam t = in_pcblookup_local(pcbinfo, sin.sin_addr, 255200027Sume lport, wild); 256200027Sume if (t && 257200027Sume (reuseport & t->inp_socket->so_options) 258200027Sume == 0 && 25998943Sluigi (ntohl(t->inp_laddr.s_addr) 26098943Sluigi != INADDR_ANY || 26198943Sluigi INP_SOCKAF(so) == 262195699Srwatson INP_SOCKAF(t->inp_socket))) 263195699Srwatson return (EADDRINUSE); 264195699Srwatson } 265195699Srwatson } 266195699Srwatson inp->in6p_laddr = sin6->sin6_addr; 267195699Srwatson } 26898943Sluigi if (lport == 0) { 269195727Srwatson ushort first, last; 270195727Srwatson int count; 271195727Srwatson 272195727Srwatson inp->inp_flags |= INP_ANONPORT; 273195727Srwatson 274195727Srwatson if (inp->inp_flags & INP_HIGHPORT) { 275195699Srwatson first = ipport_hifirstauto; /* sysctl */ 276101978Sluigi last = ipport_hilastauto; 277101978Sluigi lastport = &pcbinfo->lasthi; 278101978Sluigi } else if (inp->inp_flags & INP_LOWPORT) { 279101978Sluigi if (p && (error = suser_xxx(0, p, PRISON_ROOT))) 280101978Sluigi return error; 281101978Sluigi first = ipport_lowfirstauto; /* 1023 */ 282101978Sluigi last = ipport_lowlastauto; /* 600 */ 283105775Smaxim lastport = &pcbinfo->lastlow; 284195699Srwatson } else { 285195699Srwatson first = ipport_firstauto; /* sysctl */ 286195699Srwatson last = ipport_lastauto; 28798943Sluigi lastport = &pcbinfo->lastport; 288195727Srwatson } 289195727Srwatson /* 290195727Srwatson * Simple check to ensure all ports are not used up causing 29198943Sluigi * a deadlock here. 292195699Srwatson * 293195699Srwatson * We split the two cases (up and down) so that the direction 294195699Srwatson * is not being tested on each round of the loop. 295195699Srwatson */ 296195699Srwatson if (first > last) { 297195727Srwatson /* 298195727Srwatson * counting down 299195727Srwatson */ 300195727Srwatson count = first - last; 301195699Srwatson 302187821Sluigi do { 303195699Srwatson if (count-- < 0) { /* completely used? */ 304195862Sjulian /* 305195862Sjulian * Undo any address bind that may have 306195699Srwatson * occurred above. 307195699Srwatson */ 308195699Srwatson inp->in6p_laddr = in6addr_any; 309195699Srwatson return (EAGAIN); 310195862Sjulian } 311195862Sjulian --*lastport; 312195699Srwatson if (*lastport > first || *lastport < last) 313195862Sjulian *lastport = first; 314195862Sjulian lport = htons(*lastport); 315195699Srwatson } while (in6_pcblookup_local(pcbinfo, 316195862Sjulian &inp->in6p_laddr, lport, wild)); 317195862Sjulian } else { 318195699Srwatson /* 319195699Srwatson * counting up 320195699Srwatson */ 321195699Srwatson count = last - first; 322195699Srwatson 323195699Srwatson do { 324195699Srwatson if (count-- < 0) { /* completely used? */ 325195699Srwatson /* 326195699Srwatson * Undo any address bind that may have 327195699Srwatson * occurred above. 328195699Srwatson */ 329195699Srwatson inp->in6p_laddr = in6addr_any; 330195699Srwatson return (EAGAIN); 331195699Srwatson } 332195699Srwatson ++*lastport; 333195699Srwatson if (*lastport < first || *lastport > last) 334195699Srwatson *lastport = first; 335183550Szec lport = htons(*lastport); 336195699Srwatson } while (in6_pcblookup_local(pcbinfo, 337195699Srwatson &inp->in6p_laddr, lport, wild)); 338195699Srwatson } 339187821Sluigi } 34098943Sluigi inp->inp_lport = lport; 341149020Sbz if (in_pcbinshash(inp) != 0) { 342145093Sbrooks inp->in6p_laddr = in6addr_any; 343145093Sbrooks inp->inp_lport = 0; 34498943Sluigi return (EAGAIN); 345145093Sbrooks } 346145093Sbrooks inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 347164258Sbz return(0); 348145093Sbrooks} 349145565Sbrooks 350145246Sbrooks/* 35198943Sluigi * Transform old in6_pcbconnect() into an inner subroutine for new 35299622Sluigi * in6_pcbconnect(): Do some validity-checking on the remote 353145565Sbrooks * address (in mbuf 'nam') and then determine local host address 35498943Sluigi * (i.e., which interface) to use to access that remote host. 355145093Sbrooks * 35698943Sluigi * This preserves definition of in6_pcbconnect(), while supporting a 35798943Sluigi * slightly different version for T/TCP. (This is more than 35898943Sluigi * a bit of a kludge, but cleaning up the internal interfaces would 35998943Sluigi * have forced minor changes in every protocol). 36098943Sluigi */ 36198943Sluigi 36298943Sluigiint 36398943Sluigiin6_pcbladdr(inp, nam, plocal_addr6) 364145565Sbrooks register struct inpcb *inp; 36598943Sluigi struct sockaddr *nam; 366145093Sbrooks struct in6_addr **plocal_addr6; 367145093Sbrooks{ 36898943Sluigi register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 36998943Sluigi struct in6_pktinfo *pi; 37098943Sluigi struct ifnet *ifp = NULL; 37198943Sluigi int error = 0; 37298943Sluigi 37398943Sluigi if (nam->sa_len != sizeof (*sin6)) 37498943Sluigi return (EINVAL); 37598943Sluigi if (sin6->sin6_family != AF_INET6) 37698943Sluigi return (EAFNOSUPPORT); 37798943Sluigi if (sin6->sin6_port == 0) 37898943Sluigi return (EADDRNOTAVAIL); 37998943Sluigi 38098943Sluigi /* 38198943Sluigi * If the scope of the destination is link-local, embed the interface 38298943Sluigi * index in the address. 38398943Sluigi */ 38498943Sluigi if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 38598943Sluigi /* XXX boundary check is assumed to be already done. */ 38698943Sluigi /* XXX sin6_scope_id is weaker than advanced-api. */ 38798943Sluigi if (inp->in6p_outputopts && 38898943Sluigi (pi = inp->in6p_outputopts->ip6po_pktinfo) && 38998943Sluigi pi->ipi6_ifindex) { 39098943Sluigi sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 39198943Sluigi ifp = ifindex2ifnet[pi->ipi6_ifindex]; 39298943Sluigi } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 39398943Sluigi inp->in6p_moptions && 39498943Sluigi inp->in6p_moptions->im6o_multicast_ifp) { 39598943Sluigi sin6->sin6_addr.s6_addr16[1] = 39698943Sluigi htons(inp->in6p_moptions->im6o_multicast_ifp->if_index); 39798943Sluigi ifp = ifindex2ifnet[inp->in6p_moptions->im6o_multicast_ifp->if_index]; 39898943Sluigi } else if (sin6->sin6_scope_id) { 39998943Sluigi /* boundary check */ 40098943Sluigi if (sin6->sin6_scope_id < 0 40198943Sluigi || if_index < sin6->sin6_scope_id) { 40298943Sluigi return ENXIO; /* XXX EINVAL? */ 40398943Sluigi } 40498943Sluigi sin6->sin6_addr.s6_addr16[1] 40598943Sluigi = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 40698943Sluigi ifp = ifindex2ifnet[sin6->sin6_scope_id]; 40798943Sluigi } 40898943Sluigi } 40998943Sluigi 41098943Sluigi if (in6_ifaddr) { 41198943Sluigi /* 41298943Sluigi * If the destination address is UNSPECIFIED addr, 41398943Sluigi * use the loopback addr, e.g ::1. 41498943Sluigi */ 41598943Sluigi if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 41698943Sluigi sin6->sin6_addr = in6addr_loopback; 41798943Sluigi } 41898943Sluigi { 41998943Sluigi /* 42098943Sluigi * XXX: in6_selectsrc might replace the bound local address 42198943Sluigi * with the address specified by setsockopt(IPV6_PKTINFO). 42298943Sluigi * Is it the intended behavior? 42398943Sluigi */ 42498943Sluigi *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 42598943Sluigi inp->in6p_moptions, 42698943Sluigi &inp->in6p_route, 42798943Sluigi &inp->in6p_laddr, &error); 42898943Sluigi if (*plocal_addr6 == 0) { 42998943Sluigi if (error == 0) 43098943Sluigi error = EADDRNOTAVAIL; 43198943Sluigi return(error); 43298943Sluigi } 43398943Sluigi /* 43498943Sluigi * Don't do pcblookup call here; return interface in 43598943Sluigi * plocal_addr6 43698943Sluigi * and exit to caller, that will do the lookup. 43798943Sluigi */ 43898943Sluigi } 43998943Sluigi 44098943Sluigi if (inp->in6p_route.ro_rt) 44198943Sluigi ifp = inp->in6p_route.ro_rt->rt_ifp; 44298943Sluigi 443145093Sbrooks inp->in6p_ip6_hlim = (u_int8_t)in6_selecthlim(inp, ifp); 44498943Sluigi 44598943Sluigi return(0); 44698943Sluigi} 44798943Sluigi 44898943Sluigi/* 44998943Sluigi * Outer subroutine: 45098943Sluigi * Connect from a socket to a specified address. 45198943Sluigi * Both address and port must be specified in argument sin. 45298943Sluigi * If don't have a local address for this socket yet, 45398943Sluigi * then pick one. 45498943Sluigi */ 45598943Sluigiint 45698943Sluigiin6_pcbconnect(inp, nam, p) 45798943Sluigi register struct inpcb *inp; 45898943Sluigi struct sockaddr *nam; 45998943Sluigi struct proc *p; 46098943Sluigi{ 46198943Sluigi struct in6_addr *addr6; 46298943Sluigi register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 46398943Sluigi int error; 46498943Sluigi 46598943Sluigi /* 46698943Sluigi * Call inner routine, to assign local interface address. 46798943Sluigi */ 46898943Sluigi if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 46998943Sluigi return(error); 47098943Sluigi 47198943Sluigi if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 47298943Sluigi sin6->sin6_port, 47398943Sluigi IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 47498943Sluigi ? addr6 : &inp->in6p_laddr, 47598943Sluigi inp->inp_lport, 0, NULL) != NULL) { 47698943Sluigi return (EADDRINUSE); 47798943Sluigi } 47898943Sluigi if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 47998943Sluigi if (inp->inp_lport == 0) { 48098943Sluigi error = in6_pcbbind(inp, (struct sockaddr *)0, p); 48198943Sluigi if (error) 48298943Sluigi return (error); 48398943Sluigi } 48498943Sluigi inp->in6p_laddr = *addr6; 48598943Sluigi } 48698943Sluigi inp->in6p_faddr = sin6->sin6_addr; 48798943Sluigi inp->inp_fport = sin6->sin6_port; 48898943Sluigi /* 48998943Sluigi * xxx kazu flowlabel is necessary for connect? 49098943Sluigi * but if this line is missing, the garbage value remains. 49198943Sluigi */ 49298943Sluigi inp->in6p_flowinfo = sin6->sin6_flowinfo; 49398943Sluigi if ((inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) == 0 && 49499475Sluigi ip6_auto_flowlabel != 0) 49598943Sluigi inp->in6p_flowinfo |= 496121816Sbrooks (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 497121816Sbrooks 498121816Sbrooks in_pcbrehash(inp); 499121816Sbrooks return (0); 500121816Sbrooks} 501121816Sbrooks 502121816Sbrooks/* 50398943Sluigi * Return an IPv6 address, which is the most appropriate for given 50498943Sluigi * destination and user specified options. 50598943Sluigi * If necessary, this function lookups the routing table and return 506195023Srwatson * an entry to the caller for later use. 50798943Sluigi */ 50898943Sluigistruct in6_addr * 50998943Sluigiin6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp) 51098943Sluigi struct sockaddr_in6 *dstsock; 511191288Srwatson struct ip6_pktopts *opts; 512195023Srwatson struct ip6_moptions *mopts; 51398943Sluigi struct route_in6 *ro; 514191288Srwatson struct in6_addr *laddr; 51598943Sluigi int *errorp; 516195023Srwatson{ 51798943Sluigi struct in6_addr *dst; 51898943Sluigi struct in6_ifaddr *ia6 = 0; 51998943Sluigi struct in6_pktinfo *pi = NULL; 52098943Sluigi 521112250Scjc dst = &dstsock->sin6_addr; 522128575Sandre *errorp = 0; 523128575Sandre 524128575Sandre /* 525112250Scjc * If the source address is explicitly specified by the caller, 526116763Sluigi * use it. 527128575Sandre */ 528128575Sandre if (opts && (pi = opts->ip6po_pktinfo) && 529128575Sandre !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) 530128575Sandre return(&pi->ipi6_addr); 531128575Sandre 532128575Sandre /* 533112250Scjc * If the source address is not specified but the socket(if any) 534112250Scjc * is already bound, use the bound address. 535128575Sandre */ 536112250Scjc if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) 537112250Scjc return(laddr); 538112250Scjc 539112250Scjc /* 540112250Scjc * If the caller doesn't specify the source address but 541112250Scjc * the outgoing interface, use an address associated with 542178888Sjulian * the interface. 543112250Scjc */ 544123000Sandre if (pi && pi->ipi6_ifindex) { 545112250Scjc /* XXX boundary check is assumed to be already done. */ 546112250Scjc ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], 547123000Sandre dst); 548123000Sandre if (ia6 == 0) { 549112250Scjc *errorp = EADDRNOTAVAIL; 550123000Sandre return(0); 551123000Sandre } 552123000Sandre return(&satosin6(&ia6->ia_addr)->sin6_addr); 553186119Sqingli } 554112250Scjc 555122922Sandre /* 556112250Scjc * If the destination address is a link-local unicast address or 557128575Sandre * a multicast address, and if the outgoing interface is specified 558154769Soleg * by the sin6_scope_id filed, use an address associated with the 559154769Soleg * interface. 560154769Soleg * XXX: We're now trying to define more specific semantics of 561154769Soleg * sin6_scope_id field, so this part will be rewritten in 562154769Soleg * the near future. 563154769Soleg */ 564154769Soleg if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 565154769Soleg dstsock->sin6_scope_id) { 566122922Sandre /* 567122922Sandre * I'm not sure if boundary check for scope_id is done 568122922Sandre * somewhere... 569128575Sandre */ 570128575Sandre if (dstsock->sin6_scope_id < 0 || 571128575Sandre if_index < dstsock->sin6_scope_id) { 572128575Sandre *errorp = ENXIO; /* XXX: better error? */ 573128575Sandre return(0); 574128575Sandre } 575128575Sandre ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], 576128575Sandre dst); 577132510Sandre if (ia6 == 0) { 578132510Sandre *errorp = EADDRNOTAVAIL; 579132510Sandre return(0); 580132510Sandre } 581132510Sandre return(&satosin6(&ia6->ia_addr)->sin6_addr); 582132510Sandre } 583128575Sandre 584122922Sandre /* 585116981Sluigi * If the destination address is a multicast address and 586112250Scjc * the outgoing interface for the address is specified 587112250Scjc * by the caller, use an address associated with the interface. 588145266Sphk * There is a sanity check here; if the destination has node-local 589145246Sbrooks * scope, the outgoing interfacde should be a loopback address. 590145246Sbrooks * Even if the outgoing interface is not specified, we also 591145246Sbrooks * choose a loopback interface as the outgoing interface. 592145246Sbrooks */ 593145246Sbrooks if (IN6_IS_ADDR_MULTICAST(dst)) { 594145246Sbrooks struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 595147415Smlaier 596145246Sbrooks if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 597112250Scjc ifp = &loif[0]; 598145246Sbrooks } 599145246Sbrooks 600145246Sbrooks if (ifp) { 601147415Smlaier ia6 = in6_ifawithscope(ifp, dst); 602147415Smlaier if (ia6 == 0) { 603147415Smlaier *errorp = EADDRNOTAVAIL; 604147415Smlaier return(0); 605147415Smlaier } 606145246Sbrooks return(&ia6->ia_addr.sin6_addr); 607145246Sbrooks } 608145246Sbrooks } 609145246Sbrooks 610145246Sbrooks /* 611145246Sbrooks * If the next hop address for the packet is specified 612147415Smlaier * by caller, use an address associated with the route 613147415Smlaier * to the next hop. 614147415Smlaier */ 615147415Smlaier { 616145246Sbrooks struct sockaddr_in6 *sin6_next; 617191288Srwatson struct rtentry *rt; 618195023Srwatson 619191338Srwatson if (opts && opts->ip6po_nexthop) { 620147415Smlaier sin6_next = satosin6(opts->ip6po_nexthop); 621147415Smlaier rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 622147415Smlaier if (rt) { 623147415Smlaier ia6 = in6_ifawithscope(rt->rt_ifp, dst); 624147415Smlaier if (ia6 == 0) 625191288Srwatson ia6 = ifatoia6(rt->rt_ifa); 626195023Srwatson } 627147415Smlaier if (ia6 == 0) { 628191288Srwatson *errorp = EADDRNOTAVAIL; 629147415Smlaier return(0); 630147415Smlaier } 631195023Srwatson return(&satosin6(&ia6->ia_addr)->sin6_addr); 632191288Srwatson } 633147415Smlaier } 634145246Sbrooks 635145246Sbrooks /* 636145246Sbrooks * If route is known or can be allocated now, 637147418Smlaier * our src addr is taken from the i/f, else punt. 638145246Sbrooks */ 639147418Smlaier if (ro) { 640147415Smlaier if (ro->ro_rt && 641145246Sbrooks !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 642147418Smlaier RTFREE(ro->ro_rt); 643147418Smlaier ro->ro_rt = (struct rtentry *)0; 644147415Smlaier } 645147418Smlaier if (ro->ro_rt == (struct rtentry *)0 || 646147418Smlaier ro->ro_rt->rt_ifp == (struct ifnet *)0) { 647147418Smlaier /* No route yet, so try to acquire one */ 648178888Sjulian bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 649186119Sqingli ro->ro_dst.sin6_family = AF_INET6; 650145246Sbrooks ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 651147418Smlaier ro->ro_dst.sin6_addr = *dst; 652147418Smlaier if (IN6_IS_ADDR_MULTICAST(dst)) { 653147418Smlaier ro->ro_rt = rtalloc1(&((struct route *)ro) 654152288Ssuz ->ro_dst, 0, 0UL); 655152288Ssuz } else { 656152288Ssuz rtalloc((struct route *)ro); 657152288Ssuz } 658152288Ssuz } 659152288Ssuz 660152288Ssuz /* 661152288Ssuz * in_pcbconnect() checks out IFF_LOOPBACK to skip using 662147418Smlaier * the address. But we don't know why it does so. 663147418Smlaier * It is necessary to ensure the scope even for lo0 664147415Smlaier * so doesn't check out IFF_LOOPBACK. 665147418Smlaier */ 666147418Smlaier 667147418Smlaier if (ro->ro_rt) { 668147418Smlaier ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 669147418Smlaier if (ia6 == 0) /* xxx scope error ?*/ 670147415Smlaier ia6 = ifatoia6(ro->ro_rt->rt_ifa); 671147418Smlaier } 672147418Smlaier if (ia6 == 0) { 673147418Smlaier *errorp = EHOSTUNREACH; /* no route */ 674147418Smlaier return(0); 675147418Smlaier } 676147418Smlaier return(&satosin6(&ia6->ia_addr)->sin6_addr); 677147418Smlaier } 678147418Smlaier 679147418Smlaier *errorp = EADDRNOTAVAIL; 680147418Smlaier return(0); 681147415Smlaier} 682147418Smlaier 683145246Sbrooks/* 684145246Sbrooks * Default hop limit selection. The precedence is as follows: 685145246Sbrooks * 1. Hoplimit valued specified via ioctl. 686145246Sbrooks * 2. (If the outgoing interface is detected) the current 687147415Smlaier * hop limit of the interface specified by router advertisement. 688158580Smlaier * 3. The system default hoplimit. 689147415Smlaier*/ 690158580Smlaierint 691158580Smlaierin6_selecthlim(in6p, ifp) 692158580Smlaier struct in6pcb *in6p; 693147415Smlaier struct ifnet *ifp; 694145246Sbrooks{ 695145246Sbrooks if (in6p && in6p->in6p_hops >= 0) 696149020Sbz return(in6p->in6p_hops); 697149020Sbz else if (ifp) 698149020Sbz return(nd_ifinfo[ifp->if_index].chlim); 699149020Sbz else 700149020Sbz return(ip6_defhlim); 701149020Sbz} 702149020Sbz 703149020Sbzvoid 704149020Sbzin6_pcbdisconnect(inp) 705149020Sbz struct inpcb *inp; 706149020Sbz{ 707149020Sbz bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 708149020Sbz inp->inp_fport = 0; 709149020Sbz in_pcbrehash(inp); 710149020Sbz if (inp->inp_socket->so_state & SS_NOFDREF) 711165738Sjulian in6_pcbdetach(inp); 712149020Sbz} 713165738Sjulian 714165738Sjulianvoid 715165738Sjulianin6_pcbdetach(inp) 716160025Sbz struct inpcb *inp; 717149020Sbz{ 718165738Sjulian struct socket *so = inp->inp_socket; 719149020Sbz struct inpcbinfo *ipi = inp->inp_pcbinfo; 720200027Sume 721200027Sume#ifdef IPSEC 722200027Sume if (sotoinpcb(so) != 0) 723200027Sume key_freeso(so); 724200027Sume ipsec6_delete_pcbpolicy(inp); 725200027Sume#endif /* IPSEC */ 726200027Sume inp->inp_gencnt = ++ipi->ipi_gencnt; 727200027Sume in_pcbremlists(inp); 728149020Sbz sotoinpcb(so) = 0; 729200027Sume sofree(so); 730149020Sbz if (inp->in6p_options) 731165738Sjulian m_freem(inp->in6p_options); 732165738Sjulian if (inp->in6p_outputopts) { 733165738Sjulian if (inp->in6p_outputopts->ip6po_rthdr && 734165738Sjulian inp->in6p_outputopts->ip6po_route.ro_rt) 735165738Sjulian RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt); 736165738Sjulian if (inp->in6p_outputopts->ip6po_m) 737165738Sjulian (void)m_free(inp->in6p_outputopts->ip6po_m); 738165738Sjulian free(inp->in6p_outputopts, M_IP6OPT); 739165738Sjulian } 740165738Sjulian if (inp->in6p_route.ro_rt) 741165738Sjulian rtfree(inp->in6p_route.ro_rt); 742165738Sjulian ip6_freemoptions(inp->in6p_moptions); 743165738Sjulian 744149020Sbz /* Check and free IPv4 related resources in case of mapped addr */ 745165738Sjulian if (inp->inp_options) 746149020Sbz (void)m_free(inp->inp_options); 747149020Sbz ip_freemoptions(inp->inp_moptions); 748149020Sbz 749149020Sbz inp->inp_vflag = 0; 750145266Sphk zfreei(ipi->ipi_zone, inp); 751145266Sphk} 752195699Srwatson 753195699Srwatson/* 754195727Srwatson * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 75598943Sluigi * modified to match the pru_sockaddr() and pru_peeraddr() entry points 75698943Sluigi * in struct pr_usrreqs, so that protocols can just reference then directly 75799622Sluigi * without the need for a wrapper function. The socket must have a valid 758100004Sluigi * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 75998943Sluigi * except through a kernel programming error, so it is acceptable to panic 76098943Sluigi * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 76199622Sluigi * because there actually /is/ a programming error somewhere... XXX) 76298943Sluigi */ 76398943Sluigiint 764149020Sbzin6_setsockaddr(so, nam) 765169454Srwatson struct socket *so; 766169454Srwatson struct sockaddr **nam; 76798943Sluigi{ 768149020Sbz int s; 76998943Sluigi register struct inpcb *inp; 77098943Sluigi register struct sockaddr_in6 *sin6; 771149020Sbz 77298943Sluigi /* 77398943Sluigi * Do the malloc first in case it blocks. 77498943Sluigi */ 77598943Sluigi MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 77698943Sluigi bzero(sin6, sizeof *sin6); 777181803Sbz sin6->sin6_family = AF_INET6; 77898943Sluigi sin6->sin6_len = sizeof(*sin6); 779181803Sbz 780181803Sbz s = splnet(); 781181803Sbz inp = sotoinpcb(so); 78298943Sluigi if (!inp) { 78398943Sluigi splx(s); 78498943Sluigi free(sin6, M_SONAME); 78598943Sluigi return EINVAL; 78698943Sluigi } 78798943Sluigi sin6->sin6_port = inp->inp_lport; 78898943Sluigi sin6->sin6_addr = inp->in6p_laddr; 78998943Sluigi splx(s); 79098943Sluigi if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 79198943Sluigi sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 79298943Sluigi else 793136071Sgreen sin6->sin6_scope_id = 0; /*XXX*/ 794136071Sgreen if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 795136071Sgreen sin6->sin6_addr.s6_addr16[1] = 0; 796136071Sgreen 797136071Sgreen *nam = (struct sockaddr *)sin6; 798136071Sgreen return 0; 799136071Sgreen} 80098943Sluigi 80198943Sluigiint 80298943Sluigiin6_setpeeraddr(so, nam) 803158879Soleg struct socket *so; 804158879Soleg struct sockaddr **nam; 805158879Soleg{ 80698943Sluigi int s; 80798943Sluigi struct inpcb *inp; 80898943Sluigi register struct sockaddr_in6 *sin6; 80998943Sluigi 81098943Sluigi /* 81199475Sluigi * Do the malloc first in case it blocks. 81298943Sluigi */ 81399475Sluigi MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK); 81499475Sluigi bzero((caddr_t)sin6, sizeof (*sin6)); 81599475Sluigi sin6->sin6_family = AF_INET6; 81699475Sluigi sin6->sin6_len = sizeof(struct sockaddr_in6); 81799475Sluigi 81899475Sluigi s = splnet(); 81999475Sluigi inp = sotoinpcb(so); 82098943Sluigi if (!inp) { 82199475Sluigi splx(s); 822149020Sbz free(sin6, M_SONAME); 823149020Sbz return EINVAL; 824149020Sbz } 825149020Sbz sin6->sin6_port = inp->inp_fport; 826149020Sbz sin6->sin6_addr = inp->in6p_faddr; 827149020Sbz splx(s); 828149020Sbz if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 829149020Sbz sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 83098943Sluigi else 83198943Sluigi sin6->sin6_scope_id = 0; /*XXX*/ 83298943Sluigi if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 83398943Sluigi sin6->sin6_addr.s6_addr16[1] = 0; 83498943Sluigi 83598943Sluigi *nam = (struct sockaddr *)sin6; 83698943Sluigi return 0; 83798943Sluigi} 83898943Sluigi 83998943Sluigiint 84098943Sluigiin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 84198943Sluigi{ 84298943Sluigi struct inpcb *inp = sotoinpcb(so); 84398943Sluigi int error; 844178888Sjulian 845178888Sjulian if (inp == NULL) 846178888Sjulian return EINVAL; 847178888Sjulian if (inp->inp_vflag & INP_IPV4) { 84898943Sluigi error = in_setsockaddr(so, nam); 84998943Sluigi if (error == 0) 85098943Sluigi in6_sin_2_v4mapsin6_in_sock(nam); 85198943Sluigi } else 85298943Sluigi error = in6_setsockaddr(so, nam); 85398943Sluigi 85498943Sluigi return error; 85598943Sluigi} 85698943Sluigi 85798943Sluigiint 85898943Sluigiin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 85998943Sluigi{ 86098943Sluigi struct inpcb *inp = sotoinpcb(so); 86198943Sluigi int error; 862100004Sluigi 863161424Sjulian if (inp == NULL) 864161424Sjulian return EINVAL; 865161424Sjulian if (inp->inp_vflag & INP_IPV4) { 866161424Sjulian error = in_setpeeraddr(so, nam); 867161424Sjulian if (error == 0) 86898943Sluigi in6_sin_2_v4mapsin6_in_sock(nam); 869100004Sluigi } else 870161424Sjulian error = in6_setpeeraddr(so, nam); 871161424Sjulian 87298943Sluigi return error; 873100004Sluigi} 874107897Smaxim 87598943Sluigi/* 87698943Sluigi * Pass some notification to all connections of a protocol 877141351Sglebius * associated with address dst. The local address and/or port numbers 878141351Sglebius * may be specified to limit the search. The "usual action" will be 879141351Sglebius * taken, depending on the ctlinput cmd. The caller must filter any 880141351Sglebius * cmds that are uninteresting (e.g., no error in the map). 881141351Sglebius * Call the protocol specific routine (if any) to report 882141351Sglebius * any errors for each matching socket. 883141351Sglebius * 884141351Sglebius * Must be called at splnet. 885165648Spiso */ 886165648Spisovoid 887165648Spisoin6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 888190633Spiso struct inpcbhead *head; 889190633Spiso struct sockaddr *dst; 890190633Spiso u_int fport_arg, lport_arg; 891105775Smaxim struct in6_addr *laddr6; 89298943Sluigi int cmd; 89398943Sluigi void (*notify) __P((struct inpcb *, int)); 89498943Sluigi{ 89598943Sluigi struct inpcb *inp, *oinp; 89698943Sluigi struct in6_addr faddr6; 89798943Sluigi u_short fport = fport_arg, lport = lport_arg; 89898943Sluigi int errno, s; 899149020Sbz 90098943Sluigi if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 901149020Sbz return; 902200102Sume faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 903200102Sume if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) 904200102Sume return; 905200102Sume 906200102Sume /* 907149020Sbz * Redirects go to all references to the destination, 908149020Sbz * and use in_rtchange to invalidate the route cache. 909149020Sbz * Dead host indications: notify all references to the destination. 910149020Sbz * Otherwise, if we have knowledge of the local port and address, 911149020Sbz * deliver only to that socket. 912149020Sbz */ 913149020Sbz if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 914149020Sbz fport = 0; 915149020Sbz lport = 0; 916149020Sbz bzero((caddr_t)laddr6, sizeof(*laddr6)); 917163237Smaxim if (cmd != PRC_HOSTDEAD) 918165118Sbz notify = in6_rtchange; 919149020Sbz } 920165118Sbz errno = inet6ctlerrmap[cmd]; 921149020Sbz s = splnet(); 922165118Sbz for (inp = LIST_FIRST(head); inp != NULL;) { 92398943Sluigi if ((inp->inp_vflag & INP_IPV6) == 0) { 924165738Sjulian inp = LIST_NEXT(inp, inp_list); 925165738Sjulian continue; 926165738Sjulian } 927149020Sbz if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) || 928149020Sbz inp->inp_socket == 0 || 929149020Sbz (lport && inp->inp_lport != lport) || 930149020Sbz (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && 931149020Sbz !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) || 93298943Sluigi (fport && inp->inp_fport != fport)) { 933149020Sbz inp = LIST_NEXT(inp, inp_list); 934149020Sbz continue; 935149020Sbz } 93698943Sluigi oinp = inp; 937149020Sbz inp = LIST_NEXT(inp, inp_list); 93898943Sluigi if (notify) 939149020Sbz (*notify)(oinp, errno); 94098943Sluigi } 941100004Sluigi splx(s); 942100004Sluigi} 943149020Sbz 944100004Sluigi/* 94598943Sluigi * Lookup a PCB based on the local address and port. 946149020Sbz */ 94798943Sluigistruct inpcb * 94898943Sluigiin6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 94998943Sluigi struct inpcbinfo *pcbinfo; 950149020Sbz struct in6_addr *laddr; 95198943Sluigi u_int lport_arg; 952100004Sluigi int wild_okay; 953100004Sluigi{ 954149020Sbz register struct inpcb *inp; 955100004Sluigi int matchwild = 3, wildcard; 95698943Sluigi u_short lport = lport_arg; 957149020Sbz 95898943Sluigi if (!wild_okay) { 95998943Sluigi struct inpcbhead *head; 96098943Sluigi /* 961149020Sbz * Look for an unconnected (wildcard foreign addr) PCB that 96298943Sluigi * matches the local address and port we're looking for. 96398943Sluigi */ 96498943Sluigi head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 96598943Sluigi pcbinfo->hashmask)]; 96698943Sluigi LIST_FOREACH(inp, head, inp_hash) { 96798943Sluigi if ((inp->inp_vflag & INP_IPV6) == 0) 968149020Sbz continue; 969149020Sbz if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 97098943Sluigi IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 971149020Sbz inp->inp_lport == lport) { 972149020Sbz /* 973165738Sjulian * Found. 974149020Sbz */ 975149020Sbz return (inp); 976149020Sbz } 977149020Sbz } 978149020Sbz /* 979149020Sbz * Not found. 980149020Sbz */ 981149020Sbz return (NULL); 982149020Sbz } else { 983149020Sbz struct inpcbporthead *porthash; 98498943Sluigi struct inpcbport *phd; 985149020Sbz struct inpcb *match = NULL; 986149020Sbz /* 987149020Sbz * Best fit PCB lookup. 98898943Sluigi * 98998943Sluigi * First see if this local port is in use by looking on the 99098943Sluigi * port hash list. 991149020Sbz */ 992163237Smaxim porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 993149020Sbz pcbinfo->porthashmask)]; 994149020Sbz LIST_FOREACH(phd, porthash, phd_hash) { 995149020Sbz if (phd->phd_port == lport) 996149020Sbz break; 997149020Sbz } 998149020Sbz if (phd != NULL) { 999149020Sbz /* 1000149020Sbz * Port is in use by one or more PCBs. Look for best 1001149020Sbz * fit. 1002149020Sbz */ 1003149020Sbz LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1004149020Sbz wildcard = 0; 1005149020Sbz if ((inp->inp_vflag & INP_IPV6) == 0) 1006149020Sbz continue; 1007149020Sbz if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 1008149020Sbz wildcard++; 1009149020Sbz if (!IN6_IS_ADDR_UNSPECIFIED( 1010149020Sbz &inp->in6p_laddr)) { 1011149020Sbz if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 1012149020Sbz wildcard++; 1013149020Sbz else if (!IN6_ARE_ADDR_EQUAL( 1014149020Sbz &inp->in6p_laddr, laddr)) 1015149020Sbz continue; 1016149020Sbz } else { 1017149020Sbz if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 101898943Sluigi wildcard++; 101998943Sluigi } 102098943Sluigi if (wildcard < matchwild) { 1021121816Sbrooks match = inp; 102298943Sluigi matchwild = wildcard; 102398943Sluigi if (matchwild == 0) { 1024121816Sbrooks break; 102598943Sluigi } 102698943Sluigi } 102798943Sluigi } 102898943Sluigi } 102998943Sluigi return (match); 103098943Sluigi } 103198943Sluigi} 103298943Sluigi 103398943Sluigi/* 103498943Sluigi * Check for alternatives when higher level complains 103598943Sluigi * about service problems. For now, invalidate cached 103698943Sluigi * routing information. If the route was created dynamically 103798943Sluigi * (by a redirect), time to try a default gateway again. 103898943Sluigi */ 103999475Sluigivoid 104098943Sluigiin6_losing(in6p) 104198943Sluigi struct inpcb *in6p; 104298943Sluigi{ 104398943Sluigi struct rtentry *rt; 104498943Sluigi struct rt_addrinfo info; 104598943Sluigi 104698943Sluigi if ((rt = in6p->in6p_route.ro_rt) != NULL) { 1047145266Sphk in6p->in6p_route.ro_rt = 0; 1048145266Sphk bzero((caddr_t)&info, sizeof(info)); 1049145267Sphk info.rti_info[RTAX_DST] = 1050145266Sphk (struct sockaddr *)&in6p->in6p_route.ro_dst; 1051145266Sphk info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1052145266Sphk info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1053181803Sbz rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 105498943Sluigi if (rt->rt_flags & RTF_DYNAMIC) 105598943Sluigi (void)rtrequest(RTM_DELETE, rt_key(rt), 105698943Sluigi rt->rt_gateway, rt_mask(rt), rt->rt_flags, 1057200055Sume (struct rtentry **)0); 1058200055Sume else 1059200055Sume /* 1060200055Sume * A new route can be allocated 1061200102Sume * the next time output is attempted. 1062200102Sume */ 1063200102Sume rtfree(rt); 1064200102Sume } 1065200102Sume} 1066200055Sume 1067200055Sume/* 1068200055Sume * After a routing change, flush old routing 1069200055Sume * and allocate a (hopefully) better one. 1070200055Sume */ 1071200055Sumevoid 1072200055Sumein6_rtchange(inp, errno) 1073200055Sume struct inpcb *inp; 1074200055Sume int errno; 1075200055Sume{ 1076200055Sume if (inp->in6p_route.ro_rt) { 1077200055Sume rtfree(inp->in6p_route.ro_rt); 1078200055Sume inp->in6p_route.ro_rt = 0; 1079200055Sume /* 1080200055Sume * A new route can be allocated the next time 1081200055Sume * output is attempted. 1082200055Sume */ 108398943Sluigi } 108498943Sluigi} 108598943Sluigi 108698943Sluigi/* 108798943Sluigi * Lookup PCB in hash list. 108898943Sluigi */ 108998943Sluigistruct inpcb * 109098943Sluigiin6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 109198943Sluigi struct inpcbinfo *pcbinfo; 109298943Sluigi struct in6_addr *faddr, *laddr; 109398943Sluigi u_int fport_arg, lport_arg; 109498943Sluigi int wildcard; 1095200055Sume struct ifnet *ifp; 109698943Sluigi{ 109798943Sluigi struct inpcbhead *head; 109898943Sluigi register struct inpcb *inp; 109998943Sluigi u_short fport = fport_arg, lport = lport_arg; 1100181803Sbz 1101141076Scsjp /* 110298943Sluigi * First look for an exact match. 110398943Sluigi */ 110498943Sluigi head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, 110598943Sluigi lport, fport, 110698943Sluigi pcbinfo->hashmask)]; 110798943Sluigi LIST_FOREACH(inp, head, inp_hash) { 110898943Sluigi if ((inp->inp_vflag & INP_IPV6) == 0) 110998943Sluigi continue; 111098943Sluigi if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 111198943Sluigi IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 111298943Sluigi inp->inp_fport == fport && 111398943Sluigi inp->inp_lport == lport) { 111498943Sluigi /* 111598943Sluigi * Found. 111698943Sluigi */ 111798943Sluigi return (inp); 111898943Sluigi } 111998943Sluigi } 112098943Sluigi if (wildcard) { 112198943Sluigi struct inpcb *local_wild = NULL; 112298943Sluigi 112398943Sluigi head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 112498943Sluigi pcbinfo->hashmask)]; 112598943Sluigi LIST_FOREACH(inp, head, inp_hash) { 112698943Sluigi if ((inp->inp_vflag & INP_IPV6) == 0) 1127120141Ssam continue; 1128120141Ssam if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 1129181803Sbz inp->inp_lport == lport) { 113098943Sluigi#if defined(NFAITH) && NFAITH > 0 113198943Sluigi if (ifp && ifp->if_type == IFT_FAITH && 1132150350Sandre (inp->inp_flags & INP_FAITH) == 0) 113398943Sluigi continue; 1134150350Sandre#endif 113598943Sluigi if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 113698943Sluigi laddr)) 113798943Sluigi return (inp); 113898943Sluigi else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 113998943Sluigi local_wild = inp; 114098943Sluigi } 114198943Sluigi } 1142181803Sbz return (local_wild); 1143181803Sbz } 114498943Sluigi 114598943Sluigi /* 114698943Sluigi * Not found. 114798943Sluigi */ 114898943Sluigi return (NULL); 114998943Sluigi} 115098943Sluigi 115198943Sluigivoid 115298943Sluigiinit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 115398943Sluigi{ 115498943Sluigi struct ip6_hdr *ip; 115598943Sluigi 115698943Sluigi ip = mtod(m, struct ip6_hdr *); 115798943Sluigi bzero(sin6, sizeof(*sin6)); 115898943Sluigi sin6->sin6_len = sizeof(*sin6); 115998943Sluigi sin6->sin6_family = AF_INET6; 116098943Sluigi sin6->sin6_addr = ip->ip6_src; 1161108258Smaxim if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 116298943Sluigi sin6->sin6_addr.s6_addr16[1] = 0; 116398943Sluigi sin6->sin6_scope_id = 116498943Sluigi (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 116598943Sluigi ? m->m_pkthdr.rcvif->if_index : 0; 1166150350Sandre 116798943Sluigi return; 116898943Sluigi} 1169121123Smckusick