in6_pcb.c revision 134121
162587Sitojun/* $FreeBSD: head/sys/netinet6/in6_pcb.c 134121 2004-08-21 17:38:48Z rwatson $ */ 278064Sume/* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */ 362587Sitojun 453541Sshin/* 553541Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 653541Sshin * All rights reserved. 753541Sshin * 853541Sshin * Redistribution and use in source and binary forms, with or without 953541Sshin * modification, are permitted provided that the following conditions 1053541Sshin * are met: 1153541Sshin * 1. Redistributions of source code must retain the above copyright 1253541Sshin * notice, this list of conditions and the following disclaimer. 1353541Sshin * 2. Redistributions in binary form must reproduce the above copyright 1453541Sshin * notice, this list of conditions and the following disclaimer in the 1553541Sshin * documentation and/or other materials provided with the distribution. 1653541Sshin * 3. Neither the name of the project nor the names of its contributors 1753541Sshin * may be used to endorse or promote products derived from this software 1853541Sshin * without specific prior written permission. 1953541Sshin * 2053541Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2153541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2253541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2353541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2453541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2553541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2653541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2753541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2853541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2953541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3053541Sshin * SUCH DAMAGE. 3153541Sshin * 3253541Sshin */ 3353541Sshin 3453541Sshin/* 3553541Sshin * Copyright (c) 1982, 1986, 1991, 1993 3653541Sshin * The Regents of the University of California. All rights reserved. 3753541Sshin * 3853541Sshin * Redistribution and use in source and binary forms, with or without 3953541Sshin * modification, are permitted provided that the following conditions 4053541Sshin * are met: 4153541Sshin * 1. Redistributions of source code must retain the above copyright 4253541Sshin * notice, this list of conditions and the following disclaimer. 4353541Sshin * 2. Redistributions in binary form must reproduce the above copyright 4453541Sshin * notice, this list of conditions and the following disclaimer in the 4553541Sshin * documentation and/or other materials provided with the distribution. 4653541Sshin * 4. Neither the name of the University nor the names of its contributors 4753541Sshin * may be used to endorse or promote products derived from this software 4853541Sshin * without specific prior written permission. 4953541Sshin * 5053541Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5153541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5253541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5353541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5453541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5553541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5653541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5753541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5853541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5953541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6053541Sshin * SUCH DAMAGE. 6153541Sshin * 6253541Sshin * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 6353541Sshin */ 6453541Sshin 6578064Sume#include "opt_inet.h" 6678064Sume#include "opt_inet6.h" 6755009Sshin#include "opt_ipsec.h" 6853541Sshin 6953541Sshin#include <sys/param.h> 7053541Sshin#include <sys/systm.h> 7153541Sshin#include <sys/malloc.h> 7253541Sshin#include <sys/mbuf.h> 7355679Sshin#include <sys/domain.h> 7453541Sshin#include <sys/protosw.h> 7553541Sshin#include <sys/socket.h> 7653541Sshin#include <sys/socketvar.h> 7753541Sshin#include <sys/sockio.h> 7853541Sshin#include <sys/errno.h> 7953541Sshin#include <sys/time.h> 8053541Sshin#include <sys/proc.h> 8153541Sshin#include <sys/jail.h> 8253541Sshin 8392767Sjeff#include <vm/uma.h> 8453541Sshin 8553541Sshin#include <net/if.h> 8653541Sshin#include <net/if_types.h> 8753541Sshin#include <net/route.h> 8853541Sshin 8953541Sshin#include <netinet/in.h> 9053541Sshin#include <netinet/in_var.h> 9153541Sshin#include <netinet/in_systm.h> 9298102Shsu#include <netinet/tcp_var.h> 9362587Sitojun#include <netinet/ip6.h> 9455679Sshin#include <netinet/ip_var.h> 9553541Sshin#include <netinet6/ip6_var.h> 9653541Sshin#include <netinet6/nd6.h> 9753541Sshin#include <netinet/in_pcb.h> 9853541Sshin#include <netinet6/in6_pcb.h> 9953541Sshin 10053541Sshin#ifdef IPSEC 10153541Sshin#include <netinet6/ipsec.h> 10278064Sume#ifdef INET6 10378064Sume#include <netinet6/ipsec6.h> 10478064Sume#endif 10555009Sshin#include <netinet6/ah.h> 10678064Sume#ifdef INET6 10755009Sshin#include <netinet6/ah6.h> 10878064Sume#endif 10953541Sshin#include <netkey/key.h> 11053541Sshin#endif /* IPSEC */ 11153541Sshin 112105199Ssam#ifdef FAST_IPSEC 113105199Ssam#include <netipsec/ipsec.h> 114105199Ssam#include <netipsec/ipsec6.h> 115105199Ssam#include <netipsec/key.h> 116105199Ssam#endif /* FAST_IPSEC */ 117105199Ssam 11853541Sshinstruct in6_addr zeroin6_addr; 11953541Sshin 12053541Sshinint 121127505Spjdin6_pcbbind(inp, nam, cred) 12253541Sshin register struct inpcb *inp; 12353541Sshin struct sockaddr *nam; 124127505Spjd struct ucred *cred; 12553541Sshin{ 12653541Sshin struct socket *so = inp->inp_socket; 12753541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 12853541Sshin struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 12953541Sshin u_short lport = 0; 13097658Stanimura int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 13153541Sshin 132132714Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 133132714Srwatson INP_LOCK_ASSERT(inp); 134132714Srwatson 13553541Sshin if (!in6_ifaddr) /* XXX broken! */ 13653541Sshin return (EADDRNOTAVAIL); 13753541Sshin if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 138120856Sume return (EINVAL); 13953541Sshin if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 14053541Sshin wild = 1; 14153541Sshin if (nam) { 14253541Sshin sin6 = (struct sockaddr_in6 *)nam; 14353541Sshin if (nam->sa_len != sizeof(*sin6)) 144120856Sume return (EINVAL); 14553541Sshin /* 14653541Sshin * family check. 14753541Sshin */ 14853541Sshin if (nam->sa_family != AF_INET6) 149120856Sume return (EAFNOSUPPORT); 15053541Sshin 15162587Sitojun /* KAME hack: embed scopeid */ 15262587Sitojun if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) 15362587Sitojun return EINVAL; 15462587Sitojun /* this must be cleared for ifa_ifwithaddr() */ 15562587Sitojun sin6->sin6_scope_id = 0; 15653541Sshin 15753541Sshin lport = sin6->sin6_port; 15853541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 15953541Sshin /* 16053541Sshin * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 16153541Sshin * allow compepte duplication of binding if 16253541Sshin * SO_REUSEPORT is set, or if SO_REUSEADDR is set 16353541Sshin * and a multicast address is bound on both 16453541Sshin * new and duplicated sockets. 16553541Sshin */ 16653541Sshin if (so->so_options & SO_REUSEADDR) 16753541Sshin reuseport = SO_REUSEADDR|SO_REUSEPORT; 16853541Sshin } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 16953541Sshin struct ifaddr *ia = NULL; 17053541Sshin 17153541Sshin sin6->sin6_port = 0; /* yech... */ 17253541Sshin if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 173120856Sume return (EADDRNOTAVAIL); 17453541Sshin 17553541Sshin /* 17653541Sshin * XXX: bind to an anycast address might accidentally 17753541Sshin * cause sending a packet with anycast source address. 17878064Sume * We should allow to bind to a deprecated address, since 179120913Sume * the application dares to use it. 18053541Sshin */ 18153541Sshin if (ia && 18253541Sshin ((struct in6_ifaddr *)ia)->ia6_flags & 18378064Sume (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 184120856Sume return (EADDRNOTAVAIL); 18553541Sshin } 18653541Sshin } 18753541Sshin if (lport) { 18853541Sshin struct inpcb *t; 18953541Sshin 19053541Sshin /* GROSS */ 191127505Spjd if (ntohs(lport) < IPV6PORT_RESERVED && 192132653Scperciva suser_cred(cred, SUSER_ALLOWJAIL)) 193120856Sume return (EACCES); 19453541Sshin if (so->so_cred->cr_uid != 0 && 19553541Sshin !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 19655679Sshin t = in6_pcblookup_local(pcbinfo, 19753541Sshin &sin6->sin6_addr, lport, 19853541Sshin INPLOOKUP_WILDCARD); 199132699Syar if (t && 200132699Syar ((t->inp_vflag & INP_TIMEWAIT) == 0) && 201132699Syar (so->so_type != SOCK_STREAM || 202132699Syar IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 20397658Stanimura (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 204116453Scognet !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 205116453Scognet (t->inp_socket->so_options & SO_REUSEPORT) 206116453Scognet == 0) && (so->so_cred->cr_uid != 20797658Stanimura t->inp_socket->so_cred->cr_uid)) 20897658Stanimura return (EADDRINUSE); 20978064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 21055679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 21155679Sshin struct sockaddr_in sin; 21255679Sshin 21355679Sshin in6_sin6_2_sin(&sin, sin6); 21455679Sshin t = in_pcblookup_local(pcbinfo, 21555679Sshin sin.sin_addr, lport, 21655679Sshin INPLOOKUP_WILDCARD); 217132699Syar if (t && 218132699Syar ((t->inp_vflag & 219132699Syar INP_TIMEWAIT) == 0) && 220132699Syar (so->so_type != SOCK_STREAM || 221132699Syar ntohl(t->inp_faddr.s_addr) == 222132699Syar INADDR_ANY) && 22355679Sshin (so->so_cred->cr_uid != 224132794Syar t->inp_socket->so_cred->cr_uid)) 22555679Sshin return (EADDRINUSE); 22655679Sshin } 22753541Sshin } 22853541Sshin t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 22953541Sshin lport, wild); 230116453Scognet if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 231116453Scognet intotw(t)->tw_so_options : 232116453Scognet t->inp_socket->so_options)) == 0) 233120856Sume return (EADDRINUSE); 23478064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 23555679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 23655679Sshin struct sockaddr_in sin; 23755679Sshin 23855679Sshin in6_sin6_2_sin(&sin, sin6); 23955679Sshin t = in_pcblookup_local(pcbinfo, sin.sin_addr, 24055679Sshin lport, wild); 241116453Scognet if (t && t->inp_vflag & INP_TIMEWAIT) { 242116453Scognet if ((reuseport & 243116453Scognet intotw(t)->tw_so_options) == 0 && 244116453Scognet (ntohl(t->inp_laddr.s_addr) != 245116453Scognet INADDR_ANY || ((inp->inp_vflag & 246116453Scognet INP_IPV6PROTO) == 247116453Scognet (t->inp_vflag & INP_IPV6PROTO)))) 248116453Scognet return (EADDRINUSE); 249116453Scognet } 250116453Scognet else if (t && 251116453Scognet (reuseport & t->inp_socket->so_options) 252116453Scognet == 0 && (ntohl(t->inp_laddr.s_addr) != 253116453Scognet INADDR_ANY || INP_SOCKAF(so) == 25497658Stanimura INP_SOCKAF(t->inp_socket))) 25597658Stanimura return (EADDRINUSE); 25655679Sshin } 25753541Sshin } 25853541Sshin inp->in6p_laddr = sin6->sin6_addr; 25953541Sshin } 26053541Sshin if (lport == 0) { 26162587Sitojun int e; 262127505Spjd if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 263120856Sume return (e); 26462587Sitojun } 26562587Sitojun else { 26662587Sitojun inp->inp_lport = lport; 26762587Sitojun if (in_pcbinshash(inp) != 0) { 26862587Sitojun inp->in6p_laddr = in6addr_any; 26962587Sitojun inp->inp_lport = 0; 27062587Sitojun return (EAGAIN); 27153541Sshin } 27253541Sshin } 273120856Sume return (0); 27453541Sshin} 27553541Sshin 27653541Sshin/* 27753541Sshin * Transform old in6_pcbconnect() into an inner subroutine for new 27853541Sshin * in6_pcbconnect(): Do some validity-checking on the remote 27953541Sshin * address (in mbuf 'nam') and then determine local host address 28053541Sshin * (i.e., which interface) to use to access that remote host. 28153541Sshin * 28253541Sshin * This preserves definition of in6_pcbconnect(), while supporting a 28353541Sshin * slightly different version for T/TCP. (This is more than 28453541Sshin * a bit of a kludge, but cleaning up the internal interfaces would 28553541Sshin * have forced minor changes in every protocol). 28653541Sshin */ 28753541Sshin 28853541Sshinint 28953541Sshinin6_pcbladdr(inp, nam, plocal_addr6) 29053541Sshin register struct inpcb *inp; 29153541Sshin struct sockaddr *nam; 29253541Sshin struct in6_addr **plocal_addr6; 29353541Sshin{ 29453541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 29553541Sshin struct ifnet *ifp = NULL; 29653541Sshin int error = 0; 29753541Sshin 29853541Sshin if (nam->sa_len != sizeof (*sin6)) 29953541Sshin return (EINVAL); 30053541Sshin if (sin6->sin6_family != AF_INET6) 30153541Sshin return (EAFNOSUPPORT); 30253541Sshin if (sin6->sin6_port == 0) 30353541Sshin return (EADDRNOTAVAIL); 30453541Sshin 305132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 306132714Srwatson INP_LOCK_ASSERT(inp); 307132714Srwatson 30862587Sitojun /* KAME hack: embed scopeid */ 30962587Sitojun if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 31062587Sitojun return EINVAL; 31153541Sshin 31253541Sshin if (in6_ifaddr) { 31353541Sshin /* 31453541Sshin * If the destination address is UNSPECIFIED addr, 31553541Sshin * use the loopback addr, e.g ::1. 31653541Sshin */ 31753541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 31853541Sshin sin6->sin6_addr = in6addr_loopback; 31953541Sshin } 32053541Sshin { 32153541Sshin /* 32253541Sshin * XXX: in6_selectsrc might replace the bound local address 32353541Sshin * with the address specified by setsockopt(IPV6_PKTINFO). 32453541Sshin * Is it the intended behavior? 32553541Sshin */ 32653541Sshin *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 327122922Sandre inp->in6p_moptions, NULL, 32853541Sshin &inp->in6p_laddr, &error); 32953541Sshin if (*plocal_addr6 == 0) { 33053541Sshin if (error == 0) 33153541Sshin error = EADDRNOTAVAIL; 332120856Sume return (error); 33353541Sshin } 33453541Sshin /* 33553541Sshin * Don't do pcblookup call here; return interface in 33653541Sshin * plocal_addr6 33753541Sshin * and exit to caller, that will do the lookup. 33853541Sshin */ 33953541Sshin } 340120856Sume return (0); 34153541Sshin} 34253541Sshin 34353541Sshin/* 34453541Sshin * Outer subroutine: 34553541Sshin * Connect from a socket to a specified address. 34653541Sshin * Both address and port must be specified in argument sin. 34753541Sshin * If don't have a local address for this socket yet, 34853541Sshin * then pick one. 34953541Sshin */ 35053541Sshinint 351127505Spjdin6_pcbconnect(inp, nam, cred) 35253541Sshin register struct inpcb *inp; 35353541Sshin struct sockaddr *nam; 354127505Spjd struct ucred *cred; 35553541Sshin{ 35653541Sshin struct in6_addr *addr6; 35753541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 35853541Sshin int error; 35953541Sshin 360132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 361132714Srwatson INP_LOCK_ASSERT(inp); 362132714Srwatson 36353541Sshin /* 36495023Ssuz * Call inner routine, to assign local interface address. 36595023Ssuz * in6_pcbladdr() may automatically fill in sin6_scope_id. 36653541Sshin */ 36753541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 368120856Sume return (error); 36953541Sshin 37053541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 37153541Sshin sin6->sin6_port, 37253541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 37353541Sshin ? addr6 : &inp->in6p_laddr, 37453541Sshin inp->inp_lport, 0, NULL) != NULL) { 37553541Sshin return (EADDRINUSE); 37653541Sshin } 37753541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 37853541Sshin if (inp->inp_lport == 0) { 379127505Spjd error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 38053541Sshin if (error) 38153541Sshin return (error); 38253541Sshin } 38353541Sshin inp->in6p_laddr = *addr6; 38453541Sshin } 38553541Sshin inp->in6p_faddr = sin6->sin6_addr; 38653541Sshin inp->inp_fport = sin6->sin6_port; 38778064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 38878064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 38978064Sume if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 39055679Sshin inp->in6p_flowinfo |= 391120649Sume (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 39253541Sshin 39353541Sshin in_pcbrehash(inp); 394124465Sume#ifdef IPSEC 395124465Sume if (inp->inp_socket->so_type == SOCK_STREAM) 396124465Sume ipsec_pcbconn(inp->inp_sp); 397124465Sume#endif 39853541Sshin return (0); 39953541Sshin} 40053541Sshin 40153541Sshinvoid 40253541Sshinin6_pcbdisconnect(inp) 40353541Sshin struct inpcb *inp; 40453541Sshin{ 405132714Srwatson 406132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 407132714Srwatson INP_LOCK_ASSERT(inp); 408132714Srwatson 40953541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 41053541Sshin inp->inp_fport = 0; 41178064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 41278064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 41353541Sshin in_pcbrehash(inp); 414124465Sume#ifdef IPSEC 415124465Sume ipsec_pcbdisconn(inp->inp_sp); 416124465Sume#endif 41797658Stanimura if (inp->inp_socket->so_state & SS_NOFDREF) 41853541Sshin in6_pcbdetach(inp); 41953541Sshin} 42053541Sshin 42153541Sshinvoid 42253541Sshinin6_pcbdetach(inp) 42353541Sshin struct inpcb *inp; 42453541Sshin{ 42553541Sshin struct socket *so = inp->inp_socket; 42653541Sshin struct inpcbinfo *ipi = inp->inp_pcbinfo; 42753541Sshin 428132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 429132714Srwatson INP_LOCK_ASSERT(inp); 430132714Srwatson 431125626Sume#if defined(IPSEC) || defined(FAST_IPSEC) 43258452Sgreen if (inp->in6p_sp != NULL) 43358452Sgreen ipsec6_delete_pcbpolicy(inp); 43453541Sshin#endif /* IPSEC */ 43553541Sshin inp->inp_gencnt = ++ipi->ipi_gencnt; 43653541Sshin in_pcbremlists(inp); 437120913Sume 438111145Sjlemon if (so) { 439130388Srwatson SOCK_LOCK(so); 440111145Sjlemon so->so_pcb = NULL; 441111145Sjlemon sotryfree(so); 442111145Sjlemon } 443121472Sume 44478064Sume ip6_freepcbopts(inp->in6p_outputopts); 44578064Sume ip6_freemoptions(inp->in6p_moptions); 44655679Sshin /* Check and free IPv4 related resources in case of mapped addr */ 44755679Sshin if (inp->inp_options) 44855679Sshin (void)m_free(inp->inp_options); 44955679Sshin ip_freemoptions(inp->inp_moptions); 45053541Sshin inp->inp_vflag = 0; 45198141Shsu INP_LOCK_DESTROY(inp); 45292767Sjeff uma_zfree(ipi->ipi_zone, inp); 45353541Sshin} 45453541Sshin 455102218Struckmanstruct sockaddr * 456102218Struckmanin6_sockaddr(port, addr_p) 457102218Struckman in_port_t port; 458102218Struckman struct in6_addr *addr_p; 459102218Struckman{ 460102218Struckman struct sockaddr_in6 *sin6; 461102218Struckman 462111119Simp MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 463102218Struckman bzero(sin6, sizeof *sin6); 464102218Struckman sin6->sin6_family = AF_INET6; 465102218Struckman sin6->sin6_len = sizeof(*sin6); 466102218Struckman sin6->sin6_port = port; 467102218Struckman sin6->sin6_addr = *addr_p; 468102218Struckman if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 469102218Struckman sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 470102218Struckman else 471102218Struckman sin6->sin6_scope_id = 0; /*XXX*/ 472102218Struckman if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 473102218Struckman sin6->sin6_addr.s6_addr16[1] = 0; 474102218Struckman 475102218Struckman return (struct sockaddr *)sin6; 476102218Struckman} 477102218Struckman 478102218Struckmanstruct sockaddr * 479102218Struckmanin6_v4mapsin6_sockaddr(port, addr_p) 480102218Struckman in_port_t port; 481102218Struckman struct in_addr *addr_p; 482102218Struckman{ 483102218Struckman struct sockaddr_in sin; 484102218Struckman struct sockaddr_in6 *sin6_p; 485102218Struckman 486102218Struckman bzero(&sin, sizeof sin); 487102218Struckman sin.sin_family = AF_INET; 488102218Struckman sin.sin_len = sizeof(sin); 489102218Struckman sin.sin_port = port; 490102218Struckman sin.sin_addr = *addr_p; 491102218Struckman 492102218Struckman MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 493111119Simp M_WAITOK); 494102218Struckman in6_sin_2_v4mapsin6(&sin, sin6_p); 495102218Struckman 496102218Struckman return (struct sockaddr *)sin6_p; 497102218Struckman} 498102218Struckman 49953541Sshin/* 50053541Sshin * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 50153541Sshin * modified to match the pru_sockaddr() and pru_peeraddr() entry points 50253541Sshin * in struct pr_usrreqs, so that protocols can just reference then directly 50353541Sshin * without the need for a wrapper function. The socket must have a valid 50453541Sshin * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 50553541Sshin * except through a kernel programming error, so it is acceptable to panic 50653541Sshin * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 50753541Sshin * because there actually /is/ a programming error somewhere... XXX) 50853541Sshin */ 50953541Sshinint 51053541Sshinin6_setsockaddr(so, nam) 51153541Sshin struct socket *so; 51253541Sshin struct sockaddr **nam; 51353541Sshin{ 51453541Sshin int s; 51553541Sshin register struct inpcb *inp; 516102218Struckman struct in6_addr addr; 517102218Struckman in_port_t port; 51853541Sshin 51953541Sshin s = splnet(); 52053541Sshin inp = sotoinpcb(so); 52153541Sshin if (!inp) { 52253541Sshin splx(s); 52353541Sshin return EINVAL; 52453541Sshin } 525102218Struckman port = inp->inp_lport; 526102218Struckman addr = inp->in6p_laddr; 52753541Sshin splx(s); 52853541Sshin 529102218Struckman *nam = in6_sockaddr(port, &addr); 53053541Sshin return 0; 53153541Sshin} 53253541Sshin 53353541Sshinint 53453541Sshinin6_setpeeraddr(so, nam) 53553541Sshin struct socket *so; 53653541Sshin struct sockaddr **nam; 53753541Sshin{ 53853541Sshin int s; 53953541Sshin struct inpcb *inp; 540102218Struckman struct in6_addr addr; 541102218Struckman in_port_t port; 54253541Sshin 54353541Sshin s = splnet(); 54453541Sshin inp = sotoinpcb(so); 54553541Sshin if (!inp) { 54653541Sshin splx(s); 54753541Sshin return EINVAL; 54853541Sshin } 549102218Struckman port = inp->inp_fport; 550102218Struckman addr = inp->in6p_faddr; 55153541Sshin splx(s); 55253541Sshin 553102218Struckman *nam = in6_sockaddr(port, &addr); 55453541Sshin return 0; 55553541Sshin} 55653541Sshin 55753541Sshinint 55853541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 55953541Sshin{ 56053541Sshin struct inpcb *inp = sotoinpcb(so); 56153541Sshin int error; 56253541Sshin 56353541Sshin if (inp == NULL) 56453541Sshin return EINVAL; 565124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 56698102Shsu error = in_setsockaddr(so, nam, &tcbinfo); 56754952Seivind if (error == 0) 56853541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 569120913Sume } else { 570120913Sume /* scope issues will be handled in in6_setsockaddr(). */ 571120913Sume error = in6_setsockaddr(so, nam); 572120913Sume } 57353541Sshin 57453541Sshin return error; 57553541Sshin} 57653541Sshin 57753541Sshinint 57853541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 57953541Sshin{ 58053541Sshin struct inpcb *inp = sotoinpcb(so); 58153541Sshin int error; 58253541Sshin 58353541Sshin if (inp == NULL) 58453541Sshin return EINVAL; 585124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 58698102Shsu error = in_setpeeraddr(so, nam, &tcbinfo); 58754952Seivind if (error == 0) 58853541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 58953541Sshin } else 59095023Ssuz /* scope issues will be handled in in6_setpeeraddr(). */ 59153541Sshin error = in6_setpeeraddr(so, nam); 59253541Sshin 59353541Sshin return error; 59453541Sshin} 59553541Sshin 59653541Sshin/* 59753541Sshin * Pass some notification to all connections of a protocol 59853541Sshin * associated with address dst. The local address and/or port numbers 59953541Sshin * may be specified to limit the search. The "usual action" will be 60053541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 60153541Sshin * cmds that are uninteresting (e.g., no error in the map). 60253541Sshin * Call the protocol specific routine (if any) to report 60353541Sshin * any errors for each matching socket. 60453541Sshin * 60553541Sshin * Must be called at splnet. 60653541Sshin */ 60753541Sshinvoid 608133192Srwatsonin6_pcbnotify(pcbinfo, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify) 609133192Srwatson struct inpcbinfo *pcbinfo; 61091346Salfred struct sockaddr *dst; 61191346Salfred const struct sockaddr *src; 61253541Sshin u_int fport_arg, lport_arg; 61353541Sshin int cmd; 614125776Sume void *cmdarg; 61598211Shsu struct inpcb *(*notify) __P((struct inpcb *, int)); 61653541Sshin{ 617133192Srwatson struct inpcbhead *head; 61862587Sitojun struct inpcb *inp, *ninp; 61978064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 62053541Sshin u_short fport = fport_arg, lport = lport_arg; 62178064Sume u_int32_t flowinfo; 62253541Sshin int errno, s; 62353541Sshin 624119995Sru if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 62553541Sshin return; 62678064Sume 62778064Sume sa6_dst = (struct sockaddr_in6 *)dst; 62878064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 62953541Sshin return; 63053541Sshin 63153541Sshin /* 63278064Sume * note that src can be NULL when we get notify by local fragmentation. 63378064Sume */ 63491346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 63578064Sume flowinfo = sa6_src.sin6_flowinfo; 63678064Sume 63778064Sume /* 63853541Sshin * Redirects go to all references to the destination, 63962587Sitojun * and use in6_rtchange to invalidate the route cache. 64062587Sitojun * Dead host indications: also use in6_rtchange to invalidate 64162587Sitojun * the cache, and deliver the error to all the sockets. 64253541Sshin * Otherwise, if we have knowledge of the local port and address, 64353541Sshin * deliver only to that socket. 64453541Sshin */ 64553541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 64653541Sshin fport = 0; 64753541Sshin lport = 0; 64878064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 64962587Sitojun 65078064Sume if (cmd != PRC_HOSTDEAD) 65178064Sume notify = in6_rtchange; 65253541Sshin } 65353541Sshin errno = inet6ctlerrmap[cmd]; 65453541Sshin s = splnet(); 655133192Srwatson head = pcbinfo->listhead; 656133192Srwatson INP_INFO_WLOCK(pcbinfo); 65762587Sitojun for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 658133192Srwatson INP_LOCK(inp); 65962587Sitojun ninp = LIST_NEXT(inp, inp_list); 66062587Sitojun 661133192Srwatson if ((inp->inp_vflag & INP_IPV6) == 0) { 662133192Srwatson INP_UNLOCK(inp); 66353541Sshin continue; 664133192Srwatson } 66562587Sitojun 66678064Sume /* 667125776Sume * If the error designates a new path MTU for a destination 668125776Sume * and the application (associated with this socket) wanted to 669125776Sume * know the value, notify. Note that we notify for all 670125776Sume * disconnected sockets if the corresponding application 671125776Sume * wanted. This is because some UDP applications keep sending 672125776Sume * sockets disconnected. 673125776Sume * XXX: should we avoid to notify the value to TCP sockets? 674125776Sume */ 675125776Sume if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 676125776Sume (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 677125776Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 678125776Sume ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 679125776Sume (u_int32_t *)cmdarg); 680125776Sume } 681125776Sume 682125776Sume /* 68378064Sume * Detect if we should notify the error. If no source and 68478064Sume * destination ports are specifed, but non-zero flowinfo and 68578064Sume * local address match, notify the error. This is the case 68678064Sume * when the error is delivered with an encrypted buffer 68778064Sume * by ESP. Otherwise, just compare addresses and ports 68878064Sume * as usual. 68978064Sume */ 69078064Sume if (lport == 0 && fport == 0 && flowinfo && 69178064Sume inp->inp_socket != NULL && 69278064Sume flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 69378064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 69478064Sume goto do_notify; 69578064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 69678064Sume &sa6_dst->sin6_addr) || 69778064Sume inp->inp_socket == 0 || 69878064Sume (lport && inp->inp_lport != lport) || 69978064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 70078064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 70178064Sume &sa6_src.sin6_addr)) || 702133192Srwatson (fport && inp->inp_fport != fport)) { 703133192Srwatson INP_UNLOCK(inp); 70453541Sshin continue; 705133192Srwatson } 70662587Sitojun 70778064Sume do_notify: 708134121Srwatson if (notify) { 709134121Srwatson if ((*notify)(inp, errno)) 710134121Srwatson INP_UNLOCK(inp); 711134121Srwatson } else 712134121Srwatson INP_UNLOCK(inp); 71353541Sshin } 714133192Srwatson INP_INFO_WUNLOCK(pcbinfo); 71553541Sshin splx(s); 71653541Sshin} 71753541Sshin 71853541Sshin/* 71953541Sshin * Lookup a PCB based on the local address and port. 72053541Sshin */ 72153541Sshinstruct inpcb * 72253541Sshinin6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 72353541Sshin struct inpcbinfo *pcbinfo; 72453541Sshin struct in6_addr *laddr; 72553541Sshin u_int lport_arg; 72653541Sshin int wild_okay; 72753541Sshin{ 72853541Sshin register struct inpcb *inp; 72953541Sshin int matchwild = 3, wildcard; 73053541Sshin u_short lport = lport_arg; 73153541Sshin 73253541Sshin if (!wild_okay) { 73353541Sshin struct inpcbhead *head; 73453541Sshin /* 73553541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 73653541Sshin * matches the local address and port we're looking for. 73753541Sshin */ 73853541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 73953541Sshin pcbinfo->hashmask)]; 74053541Sshin LIST_FOREACH(inp, head, inp_hash) { 74154952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 74253541Sshin continue; 74353541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 74453541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 74553541Sshin inp->inp_lport == lport) { 74653541Sshin /* 74753541Sshin * Found. 74853541Sshin */ 74953541Sshin return (inp); 75053541Sshin } 75153541Sshin } 75253541Sshin /* 75353541Sshin * Not found. 75453541Sshin */ 75553541Sshin return (NULL); 75653541Sshin } else { 75753541Sshin struct inpcbporthead *porthash; 75853541Sshin struct inpcbport *phd; 75953541Sshin struct inpcb *match = NULL; 76053541Sshin /* 76153541Sshin * Best fit PCB lookup. 76253541Sshin * 76353541Sshin * First see if this local port is in use by looking on the 76453541Sshin * port hash list. 76553541Sshin */ 76653541Sshin porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 76753541Sshin pcbinfo->porthashmask)]; 76853541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 76953541Sshin if (phd->phd_port == lport) 77053541Sshin break; 77153541Sshin } 77253541Sshin if (phd != NULL) { 77353541Sshin /* 77453541Sshin * Port is in use by one or more PCBs. Look for best 77553541Sshin * fit. 77653541Sshin */ 77753541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 77853541Sshin wildcard = 0; 77954952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 78053541Sshin continue; 78153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 78253541Sshin wildcard++; 78353541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 78453541Sshin &inp->in6p_laddr)) { 78553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 78653541Sshin wildcard++; 78753541Sshin else if (!IN6_ARE_ADDR_EQUAL( 78853541Sshin &inp->in6p_laddr, laddr)) 78953541Sshin continue; 79053541Sshin } else { 79153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 79253541Sshin wildcard++; 79353541Sshin } 79453541Sshin if (wildcard < matchwild) { 79553541Sshin match = inp; 79653541Sshin matchwild = wildcard; 79753541Sshin if (matchwild == 0) { 79853541Sshin break; 79953541Sshin } 80053541Sshin } 80153541Sshin } 80253541Sshin } 80353541Sshin return (match); 80453541Sshin } 80553541Sshin} 80653541Sshin 80781127Sumevoid 80881127Sumein6_pcbpurgeif0(head, ifp) 80981127Sume struct in6pcb *head; 81081127Sume struct ifnet *ifp; 81181127Sume{ 81281127Sume struct in6pcb *in6p; 81381127Sume struct ip6_moptions *im6o; 81481127Sume struct in6_multi_mship *imm, *nimm; 81581127Sume 81681127Sume for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 81781127Sume im6o = in6p->in6p_moptions; 81881127Sume if ((in6p->inp_vflag & INP_IPV6) && 81981127Sume im6o) { 82081127Sume /* 82181127Sume * Unselect the outgoing interface if it is being 82281127Sume * detached. 82381127Sume */ 82481127Sume if (im6o->im6o_multicast_ifp == ifp) 82581127Sume im6o->im6o_multicast_ifp = NULL; 82681127Sume 82781127Sume /* 82881127Sume * Drop multicast group membership if we joined 82981127Sume * through the interface being detached. 83081127Sume * XXX controversial - is it really legal for kernel 83181127Sume * to force this? 83281127Sume */ 83381127Sume for (imm = im6o->im6o_memberships.lh_first; 83481127Sume imm != NULL; imm = nimm) { 83581127Sume nimm = imm->i6mm_chain.le_next; 83681127Sume if (imm->i6mm_maddr->in6m_ifp == ifp) { 83781127Sume LIST_REMOVE(imm, i6mm_chain); 83881127Sume in6_delmulti(imm->i6mm_maddr); 83981127Sume free(imm, M_IPMADDR); 84081127Sume } 84181127Sume } 84281127Sume } 84381127Sume } 84481127Sume} 84581127Sume 84653541Sshin/* 84753541Sshin * Check for alternatives when higher level complains 84853541Sshin * about service problems. For now, invalidate cached 84953541Sshin * routing information. If the route was created dynamically 85053541Sshin * (by a redirect), time to try a default gateway again. 85153541Sshin */ 85253541Sshinvoid 85353541Sshinin6_losing(in6p) 85453541Sshin struct inpcb *in6p; 85553541Sshin{ 856122922Sandre /* 857122922Sandre * We don't store route pointers in the routing table anymore 858122922Sandre */ 859122922Sandre return; 86053541Sshin} 86153541Sshin 86253541Sshin/* 86353541Sshin * After a routing change, flush old routing 86453541Sshin * and allocate a (hopefully) better one. 86553541Sshin */ 86698211Shsustruct inpcb * 86753541Sshinin6_rtchange(inp, errno) 86853541Sshin struct inpcb *inp; 86953541Sshin int errno; 87053541Sshin{ 871122922Sandre /* 872122922Sandre * We don't store route pointers in the routing table anymore 873122922Sandre */ 87498211Shsu return inp; 87553541Sshin} 87653541Sshin 87753541Sshin/* 87853541Sshin * Lookup PCB in hash list. 87953541Sshin */ 88053541Sshinstruct inpcb * 88153541Sshinin6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 88253541Sshin struct inpcbinfo *pcbinfo; 88353541Sshin struct in6_addr *faddr, *laddr; 88453541Sshin u_int fport_arg, lport_arg; 88553541Sshin int wildcard; 88653541Sshin struct ifnet *ifp; 88753541Sshin{ 88853541Sshin struct inpcbhead *head; 88953541Sshin register struct inpcb *inp; 89053541Sshin u_short fport = fport_arg, lport = lport_arg; 89178064Sume int faith; 89253541Sshin 89383934Sbrooks if (faithprefix_p != NULL) 89483934Sbrooks faith = (*faithprefix_p)(laddr); 89583934Sbrooks else 89683934Sbrooks faith = 0; 89778064Sume 89853541Sshin /* 89953541Sshin * First look for an exact match. 90053541Sshin */ 90153541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, 90253541Sshin lport, fport, 90353541Sshin pcbinfo->hashmask)]; 90454263Sshin LIST_FOREACH(inp, head, inp_hash) { 90554952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 90653541Sshin continue; 90753541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 90853541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 90953541Sshin inp->inp_fport == fport && 91053541Sshin inp->inp_lport == lport) { 91153541Sshin /* 91253541Sshin * Found. 91353541Sshin */ 91453541Sshin return (inp); 91553541Sshin } 91653541Sshin } 91753541Sshin if (wildcard) { 91853541Sshin struct inpcb *local_wild = NULL; 91953541Sshin 92053541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 92153541Sshin pcbinfo->hashmask)]; 92254263Sshin LIST_FOREACH(inp, head, inp_hash) { 92354952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 92453541Sshin continue; 92553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 92653541Sshin inp->inp_lport == lport) { 92778064Sume if (faith && (inp->inp_flags & INP_FAITH) == 0) 92853541Sshin continue; 92953541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 93053541Sshin laddr)) 93153541Sshin return (inp); 93253541Sshin else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 93353541Sshin local_wild = inp; 93453541Sshin } 93553541Sshin } 93653541Sshin return (local_wild); 93753541Sshin } 93853541Sshin 93953541Sshin /* 94053541Sshin * Not found. 94153541Sshin */ 94253541Sshin return (NULL); 94353541Sshin} 94453541Sshin 94553541Sshinvoid 94653541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 94753541Sshin{ 94853541Sshin struct ip6_hdr *ip; 94953541Sshin 95053541Sshin ip = mtod(m, struct ip6_hdr *); 95153541Sshin bzero(sin6, sizeof(*sin6)); 95253541Sshin sin6->sin6_len = sizeof(*sin6); 95353541Sshin sin6->sin6_family = AF_INET6; 95453541Sshin sin6->sin6_addr = ip->ip6_src; 95553541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 95653541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 95753541Sshin sin6->sin6_scope_id = 95853541Sshin (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 95953541Sshin ? m->m_pkthdr.rcvif->if_index : 0; 96053541Sshin 96153541Sshin return; 96253541Sshin} 963