in6_pcb.c revision 157673
162587Sitojun/* $FreeBSD: head/sys/netinet6/in6_pcb.c 157673 2006-04-12 02:52:14Z rwatson $ */ 278064Sume/* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ */ 362587Sitojun 4139826Simp/*- 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 34139826Simp/*- 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> 99148385Sume#include <netinet6/scope6_var.h> 10053541Sshin 10153541Sshin#ifdef IPSEC 10253541Sshin#include <netinet6/ipsec.h> 10378064Sume#ifdef INET6 10478064Sume#include <netinet6/ipsec6.h> 10578064Sume#endif 10655009Sshin#include <netinet6/ah.h> 10778064Sume#ifdef INET6 10855009Sshin#include <netinet6/ah6.h> 10978064Sume#endif 11053541Sshin#include <netkey/key.h> 11153541Sshin#endif /* IPSEC */ 11253541Sshin 113105199Ssam#ifdef FAST_IPSEC 114105199Ssam#include <netipsec/ipsec.h> 115105199Ssam#include <netipsec/ipsec6.h> 116105199Ssam#include <netipsec/key.h> 117105199Ssam#endif /* FAST_IPSEC */ 118105199Ssam 11953541Sshinstruct in6_addr zeroin6_addr; 12053541Sshin 12153541Sshinint 122127505Spjdin6_pcbbind(inp, nam, cred) 12353541Sshin register struct inpcb *inp; 12453541Sshin struct sockaddr *nam; 125127505Spjd struct ucred *cred; 12653541Sshin{ 12753541Sshin struct socket *so = inp->inp_socket; 12853541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 12953541Sshin struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 13053541Sshin u_short lport = 0; 13197658Stanimura int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 13253541Sshin 133132714Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 134132714Srwatson INP_LOCK_ASSERT(inp); 135132714Srwatson 13653541Sshin if (!in6_ifaddr) /* XXX broken! */ 13753541Sshin return (EADDRNOTAVAIL); 13853541Sshin if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 139120856Sume return (EINVAL); 14053541Sshin if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 14153541Sshin wild = 1; 14253541Sshin if (nam) { 143148385Sume int error; 144148385Sume 14553541Sshin sin6 = (struct sockaddr_in6 *)nam; 14653541Sshin if (nam->sa_len != sizeof(*sin6)) 147120856Sume return (EINVAL); 14853541Sshin /* 14953541Sshin * family check. 15053541Sshin */ 15153541Sshin if (nam->sa_family != AF_INET6) 152120856Sume return (EAFNOSUPPORT); 15353541Sshin 154148385Sume if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 155148385Sume return(error); 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 */ 191156877Sdwmalone if (ntohs(lport) <= ipport_reservedhigh && 192156877Sdwmalone ntohs(lport) >= ipport_reservedlow && 193132653Scperciva suser_cred(cred, SUSER_ALLOWJAIL)) 194120856Sume return (EACCES); 19553541Sshin if (so->so_cred->cr_uid != 0 && 19653541Sshin !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 19755679Sshin t = in6_pcblookup_local(pcbinfo, 19853541Sshin &sin6->sin6_addr, lport, 19953541Sshin INPLOOKUP_WILDCARD); 200132699Syar if (t && 201132699Syar ((t->inp_vflag & INP_TIMEWAIT) == 0) && 202132699Syar (so->so_type != SOCK_STREAM || 203132699Syar IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 20497658Stanimura (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 205116453Scognet !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 206116453Scognet (t->inp_socket->so_options & SO_REUSEPORT) 207116453Scognet == 0) && (so->so_cred->cr_uid != 20897658Stanimura t->inp_socket->so_cred->cr_uid)) 20997658Stanimura return (EADDRINUSE); 21078064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 21155679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 21255679Sshin struct sockaddr_in sin; 21355679Sshin 21455679Sshin in6_sin6_2_sin(&sin, sin6); 21555679Sshin t = in_pcblookup_local(pcbinfo, 21655679Sshin sin.sin_addr, lport, 21755679Sshin INPLOOKUP_WILDCARD); 218132699Syar if (t && 219132699Syar ((t->inp_vflag & 220132699Syar INP_TIMEWAIT) == 0) && 221132699Syar (so->so_type != SOCK_STREAM || 222132699Syar ntohl(t->inp_faddr.s_addr) == 223132699Syar INADDR_ANY) && 22455679Sshin (so->so_cred->cr_uid != 225132794Syar t->inp_socket->so_cred->cr_uid)) 22655679Sshin return (EADDRINUSE); 22755679Sshin } 22853541Sshin } 22953541Sshin t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 23053541Sshin lport, wild); 231116453Scognet if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ? 232116453Scognet intotw(t)->tw_so_options : 233116453Scognet t->inp_socket->so_options)) == 0) 234120856Sume return (EADDRINUSE); 23578064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 23655679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 23755679Sshin struct sockaddr_in sin; 23855679Sshin 23955679Sshin in6_sin6_2_sin(&sin, sin6); 24055679Sshin t = in_pcblookup_local(pcbinfo, sin.sin_addr, 24155679Sshin lport, wild); 242116453Scognet if (t && t->inp_vflag & INP_TIMEWAIT) { 243116453Scognet if ((reuseport & 244116453Scognet intotw(t)->tw_so_options) == 0 && 245116453Scognet (ntohl(t->inp_laddr.s_addr) != 246116453Scognet INADDR_ANY || ((inp->inp_vflag & 247116453Scognet INP_IPV6PROTO) == 248116453Scognet (t->inp_vflag & INP_IPV6PROTO)))) 249116453Scognet return (EADDRINUSE); 250116453Scognet } 251116453Scognet else if (t && 252116453Scognet (reuseport & t->inp_socket->so_options) 253116453Scognet == 0 && (ntohl(t->inp_laddr.s_addr) != 254116453Scognet INADDR_ANY || INP_SOCKAF(so) == 25597658Stanimura INP_SOCKAF(t->inp_socket))) 25697658Stanimura return (EADDRINUSE); 25755679Sshin } 25853541Sshin } 25953541Sshin inp->in6p_laddr = sin6->sin6_addr; 26053541Sshin } 26153541Sshin if (lport == 0) { 26262587Sitojun int e; 263127505Spjd if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 264120856Sume return (e); 26562587Sitojun } 26662587Sitojun else { 26762587Sitojun inp->inp_lport = lport; 26862587Sitojun if (in_pcbinshash(inp) != 0) { 26962587Sitojun inp->in6p_laddr = in6addr_any; 27062587Sitojun inp->inp_lport = 0; 27162587Sitojun return (EAGAIN); 27253541Sshin } 27353541Sshin } 274120856Sume return (0); 27553541Sshin} 27653541Sshin 27753541Sshin/* 27853541Sshin * Transform old in6_pcbconnect() into an inner subroutine for new 27953541Sshin * in6_pcbconnect(): Do some validity-checking on the remote 28053541Sshin * address (in mbuf 'nam') and then determine local host address 28153541Sshin * (i.e., which interface) to use to access that remote host. 28253541Sshin * 28353541Sshin * This preserves definition of in6_pcbconnect(), while supporting a 28453541Sshin * slightly different version for T/TCP. (This is more than 28553541Sshin * a bit of a kludge, but cleaning up the internal interfaces would 28653541Sshin * have forced minor changes in every protocol). 28753541Sshin */ 28853541Sshin 28953541Sshinint 29053541Sshinin6_pcbladdr(inp, nam, plocal_addr6) 29153541Sshin register struct inpcb *inp; 29253541Sshin struct sockaddr *nam; 29353541Sshin struct in6_addr **plocal_addr6; 29453541Sshin{ 29553541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 296148385Sume int error = 0; 29753541Sshin struct ifnet *ifp = NULL; 298148385Sume int scope_ambiguous = 0; 29953541Sshin 30053541Sshin if (nam->sa_len != sizeof (*sin6)) 30153541Sshin return (EINVAL); 30253541Sshin if (sin6->sin6_family != AF_INET6) 30353541Sshin return (EAFNOSUPPORT); 30453541Sshin if (sin6->sin6_port == 0) 30553541Sshin return (EADDRNOTAVAIL); 30653541Sshin 307148385Sume if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 308148385Sume scope_ambiguous = 1; 309148385Sume if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 310148385Sume return(error); 311148385Sume 312132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 313132714Srwatson INP_LOCK_ASSERT(inp); 314132714Srwatson 31553541Sshin if (in6_ifaddr) { 31653541Sshin /* 31753541Sshin * If the destination address is UNSPECIFIED addr, 31853541Sshin * use the loopback addr, e.g ::1. 31953541Sshin */ 32053541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 32153541Sshin sin6->sin6_addr = in6addr_loopback; 32253541Sshin } 323148385Sume 324148385Sume /* 325148385Sume * XXX: in6_selectsrc might replace the bound local address 326148385Sume * with the address specified by setsockopt(IPV6_PKTINFO). 327148385Sume * Is it the intended behavior? 328148385Sume */ 329148385Sume *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 330148385Sume inp->in6p_moptions, NULL, 331148385Sume &inp->in6p_laddr, &ifp, &error); 332148385Sume if (ifp && scope_ambiguous && 333148385Sume (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 334148385Sume return(error); 33553541Sshin } 336148385Sume 337148385Sume if (*plocal_addr6 == 0) { 338148385Sume if (error == 0) 339148385Sume error = EADDRNOTAVAIL; 340148385Sume return (error); 341148385Sume } 342148385Sume /* 343148385Sume * Don't do pcblookup call here; return interface in 344148385Sume * plocal_addr6 345148385Sume * and exit to caller, that will do the lookup. 346148385Sume */ 347148385Sume 348120856Sume return (0); 34953541Sshin} 35053541Sshin 35153541Sshin/* 35253541Sshin * Outer subroutine: 35353541Sshin * Connect from a socket to a specified address. 35453541Sshin * Both address and port must be specified in argument sin. 35553541Sshin * If don't have a local address for this socket yet, 35653541Sshin * then pick one. 35753541Sshin */ 35853541Sshinint 359127505Spjdin6_pcbconnect(inp, nam, cred) 36053541Sshin register struct inpcb *inp; 36153541Sshin struct sockaddr *nam; 362127505Spjd struct ucred *cred; 36353541Sshin{ 36453541Sshin struct in6_addr *addr6; 36553541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 36653541Sshin int error; 36753541Sshin 368132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 369132714Srwatson INP_LOCK_ASSERT(inp); 370132714Srwatson 37153541Sshin /* 37295023Ssuz * Call inner routine, to assign local interface address. 37395023Ssuz * in6_pcbladdr() may automatically fill in sin6_scope_id. 37453541Sshin */ 37553541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 376120856Sume return (error); 37753541Sshin 37853541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 37953541Sshin sin6->sin6_port, 38053541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 38153541Sshin ? addr6 : &inp->in6p_laddr, 38253541Sshin inp->inp_lport, 0, NULL) != NULL) { 38353541Sshin return (EADDRINUSE); 38453541Sshin } 38553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 38653541Sshin if (inp->inp_lport == 0) { 387127505Spjd error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 38853541Sshin if (error) 38953541Sshin return (error); 39053541Sshin } 39153541Sshin inp->in6p_laddr = *addr6; 39253541Sshin } 39353541Sshin inp->in6p_faddr = sin6->sin6_addr; 39453541Sshin inp->inp_fport = sin6->sin6_port; 39578064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 39678064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 39778064Sume if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 39855679Sshin inp->in6p_flowinfo |= 399120649Sume (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 40053541Sshin 40153541Sshin in_pcbrehash(inp); 402124465Sume#ifdef IPSEC 403124465Sume if (inp->inp_socket->so_type == SOCK_STREAM) 404124465Sume ipsec_pcbconn(inp->inp_sp); 405124465Sume#endif 40653541Sshin return (0); 40753541Sshin} 40853541Sshin 40953541Sshinvoid 41053541Sshinin6_pcbdisconnect(inp) 41153541Sshin struct inpcb *inp; 41253541Sshin{ 413132714Srwatson 414132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 415132714Srwatson INP_LOCK_ASSERT(inp); 416132714Srwatson 41753541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 41853541Sshin inp->inp_fport = 0; 41978064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 42078064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 42153541Sshin in_pcbrehash(inp); 422124465Sume#ifdef IPSEC 423124465Sume ipsec_pcbdisconn(inp->inp_sp); 424124465Sume#endif 42553541Sshin} 42653541Sshin 42753541Sshinvoid 428157373Srwatsonin6_pcbdetach(struct inpcb *inp) 42953541Sshin{ 430157373Srwatson 431157373Srwatson KASSERT(inp->inp_socket != NULL, ("in6_pcbdetach: inp_socket == NULL")); 432157373Srwatson inp->inp_socket->so_pcb = NULL; 433157373Srwatson inp->inp_socket = NULL; 434157373Srwatson} 435157373Srwatson 436157373Srwatsonvoid 437157373Srwatsonin6_pcbfree(struct inpcb *inp) 438157373Srwatson{ 43953541Sshin struct inpcbinfo *ipi = inp->inp_pcbinfo; 44053541Sshin 441157373Srwatson KASSERT(inp->inp_socket == NULL, ("in6_pcbfree: inp_socket != NULL")); 442132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 443132714Srwatson INP_LOCK_ASSERT(inp); 444132714Srwatson 445125626Sume#if defined(IPSEC) || defined(FAST_IPSEC) 44658452Sgreen if (inp->in6p_sp != NULL) 44758452Sgreen ipsec6_delete_pcbpolicy(inp); 44853541Sshin#endif /* IPSEC */ 44953541Sshin inp->inp_gencnt = ++ipi->ipi_gencnt; 45053541Sshin in_pcbremlists(inp); 45178064Sume ip6_freepcbopts(inp->in6p_outputopts); 45278064Sume ip6_freemoptions(inp->in6p_moptions); 45355679Sshin /* Check and free IPv4 related resources in case of mapped addr */ 45455679Sshin if (inp->inp_options) 45555679Sshin (void)m_free(inp->inp_options); 45655679Sshin ip_freemoptions(inp->inp_moptions); 45753541Sshin inp->inp_vflag = 0; 45898141Shsu INP_LOCK_DESTROY(inp); 45992767Sjeff uma_zfree(ipi->ipi_zone, inp); 46053541Sshin} 46153541Sshin 462102218Struckmanstruct sockaddr * 463102218Struckmanin6_sockaddr(port, addr_p) 464102218Struckman in_port_t port; 465102218Struckman struct in6_addr *addr_p; 466102218Struckman{ 467102218Struckman struct sockaddr_in6 *sin6; 468102218Struckman 469111119Simp MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 470102218Struckman bzero(sin6, sizeof *sin6); 471102218Struckman sin6->sin6_family = AF_INET6; 472102218Struckman sin6->sin6_len = sizeof(*sin6); 473102218Struckman sin6->sin6_port = port; 474102218Struckman sin6->sin6_addr = *addr_p; 475148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 476102218Struckman 477102218Struckman return (struct sockaddr *)sin6; 478102218Struckman} 479102218Struckman 480102218Struckmanstruct sockaddr * 481102218Struckmanin6_v4mapsin6_sockaddr(port, addr_p) 482102218Struckman in_port_t port; 483102218Struckman struct in_addr *addr_p; 484102218Struckman{ 485102218Struckman struct sockaddr_in sin; 486102218Struckman struct sockaddr_in6 *sin6_p; 487102218Struckman 488102218Struckman bzero(&sin, sizeof sin); 489102218Struckman sin.sin_family = AF_INET; 490102218Struckman sin.sin_len = sizeof(sin); 491102218Struckman sin.sin_port = port; 492102218Struckman sin.sin_addr = *addr_p; 493102218Struckman 494102218Struckman MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, 495111119Simp M_WAITOK); 496102218Struckman in6_sin_2_v4mapsin6(&sin, sin6_p); 497102218Struckman 498102218Struckman return (struct sockaddr *)sin6_p; 499102218Struckman} 500102218Struckman 50153541Sshin/* 50253541Sshin * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 50353541Sshin * modified to match the pru_sockaddr() and pru_peeraddr() entry points 50453541Sshin * in struct pr_usrreqs, so that protocols can just reference then directly 50553541Sshin * without the need for a wrapper function. The socket must have a valid 50653541Sshin * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 50753541Sshin * except through a kernel programming error, so it is acceptable to panic 50853541Sshin * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 50953541Sshin * because there actually /is/ a programming error somewhere... XXX) 51053541Sshin */ 51153541Sshinint 51253541Sshinin6_setsockaddr(so, nam) 51353541Sshin struct socket *so; 51453541Sshin struct sockaddr **nam; 51553541Sshin{ 51653541Sshin register struct inpcb *inp; 517102218Struckman struct in6_addr addr; 518102218Struckman in_port_t port; 51953541Sshin 52053541Sshin inp = sotoinpcb(so); 521157673Srwatson KASSERT(inp != NULL, ("in6_setsockaddr: inp == NULL")); 522157673Srwatson 523102218Struckman port = inp->inp_lport; 524102218Struckman addr = inp->in6p_laddr; 52553541Sshin 526102218Struckman *nam = in6_sockaddr(port, &addr); 52753541Sshin return 0; 52853541Sshin} 52953541Sshin 53053541Sshinint 53153541Sshinin6_setpeeraddr(so, nam) 53253541Sshin struct socket *so; 53353541Sshin struct sockaddr **nam; 53453541Sshin{ 53553541Sshin struct inpcb *inp; 536102218Struckman struct in6_addr addr; 537102218Struckman in_port_t port; 53853541Sshin 53953541Sshin inp = sotoinpcb(so); 540157673Srwatson KASSERT(inp != NULL, ("in6_setpeeraddr: inp == NULL")); 541157673Srwatson 542102218Struckman port = inp->inp_fport; 543102218Struckman addr = inp->in6p_faddr; 54453541Sshin 545102218Struckman *nam = in6_sockaddr(port, &addr); 54653541Sshin return 0; 54753541Sshin} 54853541Sshin 54953541Sshinint 55053541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 55153541Sshin{ 552157673Srwatson struct inpcb *inp; 55353541Sshin int error; 55453541Sshin 555157673Srwatson inp = sotoinpcb(so); 556157673Srwatson KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 557157673Srwatson 558124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 55998102Shsu error = in_setsockaddr(so, nam, &tcbinfo); 56054952Seivind if (error == 0) 56153541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 562120913Sume } else { 563120913Sume /* scope issues will be handled in in6_setsockaddr(). */ 564120913Sume error = in6_setsockaddr(so, nam); 565120913Sume } 56653541Sshin 56753541Sshin return error; 56853541Sshin} 56953541Sshin 57053541Sshinint 57153541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 57253541Sshin{ 573157673Srwatson struct inpcb *inp; 57453541Sshin int error; 57553541Sshin 576157673Srwatson inp = sotoinpcb(so); 577157673Srwatson KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 578157673Srwatson 579124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 58098102Shsu error = in_setpeeraddr(so, nam, &tcbinfo); 58154952Seivind if (error == 0) 58253541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 58353541Sshin } else 58495023Ssuz /* scope issues will be handled in in6_setpeeraddr(). */ 58553541Sshin error = in6_setpeeraddr(so, nam); 58653541Sshin 58753541Sshin return error; 58853541Sshin} 58953541Sshin 59053541Sshin/* 59153541Sshin * Pass some notification to all connections of a protocol 59253541Sshin * associated with address dst. The local address and/or port numbers 59353541Sshin * may be specified to limit the search. The "usual action" will be 59453541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 59553541Sshin * cmds that are uninteresting (e.g., no error in the map). 59653541Sshin * Call the protocol specific routine (if any) to report 59753541Sshin * any errors for each matching socket. 59853541Sshin */ 59953541Sshinvoid 600133192Srwatsonin6_pcbnotify(pcbinfo, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify) 601133192Srwatson struct inpcbinfo *pcbinfo; 60291346Salfred struct sockaddr *dst; 60391346Salfred const struct sockaddr *src; 60453541Sshin u_int fport_arg, lport_arg; 60553541Sshin int cmd; 606125776Sume void *cmdarg; 60798211Shsu struct inpcb *(*notify) __P((struct inpcb *, int)); 60853541Sshin{ 609133192Srwatson struct inpcbhead *head; 61062587Sitojun struct inpcb *inp, *ninp; 61178064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 61253541Sshin u_short fport = fport_arg, lport = lport_arg; 61378064Sume u_int32_t flowinfo; 614157673Srwatson int errno; 61553541Sshin 616119995Sru if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 61753541Sshin return; 61878064Sume 61978064Sume sa6_dst = (struct sockaddr_in6 *)dst; 62078064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 62153541Sshin return; 62253541Sshin 62353541Sshin /* 62478064Sume * note that src can be NULL when we get notify by local fragmentation. 62578064Sume */ 62691346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 62778064Sume flowinfo = sa6_src.sin6_flowinfo; 62878064Sume 62978064Sume /* 63053541Sshin * Redirects go to all references to the destination, 63162587Sitojun * and use in6_rtchange to invalidate the route cache. 63262587Sitojun * Dead host indications: also use in6_rtchange to invalidate 63362587Sitojun * the cache, and deliver the error to all the sockets. 63453541Sshin * Otherwise, if we have knowledge of the local port and address, 63553541Sshin * deliver only to that socket. 63653541Sshin */ 63753541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 63853541Sshin fport = 0; 63953541Sshin lport = 0; 64078064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 64162587Sitojun 64278064Sume if (cmd != PRC_HOSTDEAD) 64378064Sume notify = in6_rtchange; 64453541Sshin } 64553541Sshin errno = inet6ctlerrmap[cmd]; 646133192Srwatson head = pcbinfo->listhead; 647133192Srwatson INP_INFO_WLOCK(pcbinfo); 64862587Sitojun for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 649133192Srwatson INP_LOCK(inp); 65062587Sitojun ninp = LIST_NEXT(inp, inp_list); 65162587Sitojun 652133192Srwatson if ((inp->inp_vflag & INP_IPV6) == 0) { 653133192Srwatson INP_UNLOCK(inp); 65453541Sshin continue; 655133192Srwatson } 65662587Sitojun 65778064Sume /* 658125776Sume * If the error designates a new path MTU for a destination 659125776Sume * and the application (associated with this socket) wanted to 660125776Sume * know the value, notify. Note that we notify for all 661125776Sume * disconnected sockets if the corresponding application 662125776Sume * wanted. This is because some UDP applications keep sending 663125776Sume * sockets disconnected. 664125776Sume * XXX: should we avoid to notify the value to TCP sockets? 665125776Sume */ 666125776Sume if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 667125776Sume (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 668125776Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 669125776Sume ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 670125776Sume (u_int32_t *)cmdarg); 671125776Sume } 672125776Sume 673125776Sume /* 67478064Sume * Detect if we should notify the error. If no source and 67578064Sume * destination ports are specifed, but non-zero flowinfo and 67678064Sume * local address match, notify the error. This is the case 67778064Sume * when the error is delivered with an encrypted buffer 67878064Sume * by ESP. Otherwise, just compare addresses and ports 67978064Sume * as usual. 68078064Sume */ 68178064Sume if (lport == 0 && fport == 0 && flowinfo && 68278064Sume inp->inp_socket != NULL && 68378064Sume flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 68478064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 68578064Sume goto do_notify; 68678064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 68778064Sume &sa6_dst->sin6_addr) || 68878064Sume inp->inp_socket == 0 || 68978064Sume (lport && inp->inp_lport != lport) || 69078064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 69178064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 69278064Sume &sa6_src.sin6_addr)) || 693133192Srwatson (fport && inp->inp_fport != fport)) { 694133192Srwatson INP_UNLOCK(inp); 69553541Sshin continue; 696133192Srwatson } 69762587Sitojun 69878064Sume do_notify: 699134121Srwatson if (notify) { 700134121Srwatson if ((*notify)(inp, errno)) 701134121Srwatson INP_UNLOCK(inp); 702134121Srwatson } else 703134121Srwatson INP_UNLOCK(inp); 70453541Sshin } 705133192Srwatson INP_INFO_WUNLOCK(pcbinfo); 70653541Sshin} 70753541Sshin 70853541Sshin/* 70953541Sshin * Lookup a PCB based on the local address and port. 71053541Sshin */ 71153541Sshinstruct inpcb * 71253541Sshinin6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 71353541Sshin struct inpcbinfo *pcbinfo; 71453541Sshin struct in6_addr *laddr; 71553541Sshin u_int lport_arg; 71653541Sshin int wild_okay; 71753541Sshin{ 71853541Sshin register struct inpcb *inp; 71953541Sshin int matchwild = 3, wildcard; 72053541Sshin u_short lport = lport_arg; 72153541Sshin 72253541Sshin if (!wild_okay) { 72353541Sshin struct inpcbhead *head; 72453541Sshin /* 72553541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 72653541Sshin * matches the local address and port we're looking for. 72753541Sshin */ 72853541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 72953541Sshin pcbinfo->hashmask)]; 73053541Sshin LIST_FOREACH(inp, head, inp_hash) { 73154952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 73253541Sshin continue; 73353541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 73453541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 73553541Sshin inp->inp_lport == lport) { 73653541Sshin /* 73753541Sshin * Found. 73853541Sshin */ 73953541Sshin return (inp); 74053541Sshin } 74153541Sshin } 74253541Sshin /* 74353541Sshin * Not found. 74453541Sshin */ 74553541Sshin return (NULL); 74653541Sshin } else { 74753541Sshin struct inpcbporthead *porthash; 74853541Sshin struct inpcbport *phd; 74953541Sshin struct inpcb *match = NULL; 75053541Sshin /* 75153541Sshin * Best fit PCB lookup. 75253541Sshin * 75353541Sshin * First see if this local port is in use by looking on the 75453541Sshin * port hash list. 75553541Sshin */ 75653541Sshin porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 75753541Sshin pcbinfo->porthashmask)]; 75853541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 75953541Sshin if (phd->phd_port == lport) 76053541Sshin break; 76153541Sshin } 76253541Sshin if (phd != NULL) { 76353541Sshin /* 76453541Sshin * Port is in use by one or more PCBs. Look for best 76553541Sshin * fit. 76653541Sshin */ 76753541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 76853541Sshin wildcard = 0; 76954952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 77053541Sshin continue; 77153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 77253541Sshin wildcard++; 77353541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 77453541Sshin &inp->in6p_laddr)) { 77553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 77653541Sshin wildcard++; 77753541Sshin else if (!IN6_ARE_ADDR_EQUAL( 77853541Sshin &inp->in6p_laddr, laddr)) 77953541Sshin continue; 78053541Sshin } else { 78153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 78253541Sshin wildcard++; 78353541Sshin } 78453541Sshin if (wildcard < matchwild) { 78553541Sshin match = inp; 78653541Sshin matchwild = wildcard; 78753541Sshin if (matchwild == 0) { 78853541Sshin break; 78953541Sshin } 79053541Sshin } 79153541Sshin } 79253541Sshin } 79353541Sshin return (match); 79453541Sshin } 79553541Sshin} 79653541Sshin 79781127Sumevoid 79881127Sumein6_pcbpurgeif0(head, ifp) 79981127Sume struct in6pcb *head; 80081127Sume struct ifnet *ifp; 80181127Sume{ 80281127Sume struct in6pcb *in6p; 80381127Sume struct ip6_moptions *im6o; 80481127Sume struct in6_multi_mship *imm, *nimm; 80581127Sume 80681127Sume for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 80781127Sume im6o = in6p->in6p_moptions; 80881127Sume if ((in6p->inp_vflag & INP_IPV6) && 80981127Sume im6o) { 81081127Sume /* 81181127Sume * Unselect the outgoing interface if it is being 81281127Sume * detached. 81381127Sume */ 81481127Sume if (im6o->im6o_multicast_ifp == ifp) 81581127Sume im6o->im6o_multicast_ifp = NULL; 81681127Sume 81781127Sume /* 81881127Sume * Drop multicast group membership if we joined 81981127Sume * through the interface being detached. 82081127Sume * XXX controversial - is it really legal for kernel 82181127Sume * to force this? 82281127Sume */ 82381127Sume for (imm = im6o->im6o_memberships.lh_first; 82481127Sume imm != NULL; imm = nimm) { 82581127Sume nimm = imm->i6mm_chain.le_next; 82681127Sume if (imm->i6mm_maddr->in6m_ifp == ifp) { 82781127Sume LIST_REMOVE(imm, i6mm_chain); 82881127Sume in6_delmulti(imm->i6mm_maddr); 829149849Sobrien free(imm, M_IP6MADDR); 83081127Sume } 83181127Sume } 83281127Sume } 83381127Sume } 83481127Sume} 83581127Sume 83653541Sshin/* 83753541Sshin * Check for alternatives when higher level complains 83853541Sshin * about service problems. For now, invalidate cached 83953541Sshin * routing information. If the route was created dynamically 84053541Sshin * (by a redirect), time to try a default gateway again. 84153541Sshin */ 84253541Sshinvoid 84353541Sshinin6_losing(in6p) 84453541Sshin struct inpcb *in6p; 84553541Sshin{ 846122922Sandre /* 847122922Sandre * We don't store route pointers in the routing table anymore 848122922Sandre */ 849122922Sandre return; 85053541Sshin} 85153541Sshin 85253541Sshin/* 85353541Sshin * After a routing change, flush old routing 85453541Sshin * and allocate a (hopefully) better one. 85553541Sshin */ 85698211Shsustruct inpcb * 85753541Sshinin6_rtchange(inp, errno) 85853541Sshin struct inpcb *inp; 85953541Sshin int errno; 86053541Sshin{ 861122922Sandre /* 862122922Sandre * We don't store route pointers in the routing table anymore 863122922Sandre */ 86498211Shsu return inp; 86553541Sshin} 86653541Sshin 86753541Sshin/* 86853541Sshin * Lookup PCB in hash list. 86953541Sshin */ 87053541Sshinstruct inpcb * 87153541Sshinin6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 87253541Sshin struct inpcbinfo *pcbinfo; 87353541Sshin struct in6_addr *faddr, *laddr; 87453541Sshin u_int fport_arg, lport_arg; 87553541Sshin int wildcard; 87653541Sshin struct ifnet *ifp; 87753541Sshin{ 87853541Sshin struct inpcbhead *head; 87953541Sshin register struct inpcb *inp; 88053541Sshin u_short fport = fport_arg, lport = lport_arg; 88178064Sume int faith; 88253541Sshin 88383934Sbrooks if (faithprefix_p != NULL) 88483934Sbrooks faith = (*faithprefix_p)(laddr); 88583934Sbrooks else 88683934Sbrooks faith = 0; 88778064Sume 88853541Sshin /* 88953541Sshin * First look for an exact match. 89053541Sshin */ 89153541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, 89253541Sshin lport, fport, 89353541Sshin pcbinfo->hashmask)]; 89454263Sshin LIST_FOREACH(inp, head, inp_hash) { 89554952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 89653541Sshin continue; 89753541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 89853541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 89953541Sshin inp->inp_fport == fport && 90053541Sshin inp->inp_lport == lport) { 90153541Sshin /* 90253541Sshin * Found. 90353541Sshin */ 90453541Sshin return (inp); 90553541Sshin } 90653541Sshin } 90753541Sshin if (wildcard) { 90853541Sshin struct inpcb *local_wild = NULL; 90953541Sshin 91053541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 91153541Sshin pcbinfo->hashmask)]; 91254263Sshin LIST_FOREACH(inp, head, inp_hash) { 91354952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 91453541Sshin continue; 91553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 91653541Sshin inp->inp_lport == lport) { 91778064Sume if (faith && (inp->inp_flags & INP_FAITH) == 0) 91853541Sshin continue; 91953541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 92053541Sshin laddr)) 92153541Sshin return (inp); 92253541Sshin else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 92353541Sshin local_wild = inp; 92453541Sshin } 92553541Sshin } 92653541Sshin return (local_wild); 92753541Sshin } 92853541Sshin 92953541Sshin /* 93053541Sshin * Not found. 93153541Sshin */ 93253541Sshin return (NULL); 93353541Sshin} 93453541Sshin 93553541Sshinvoid 93653541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 93753541Sshin{ 93853541Sshin struct ip6_hdr *ip; 93953541Sshin 94053541Sshin ip = mtod(m, struct ip6_hdr *); 94153541Sshin bzero(sin6, sizeof(*sin6)); 94253541Sshin sin6->sin6_len = sizeof(*sin6); 94353541Sshin sin6->sin6_family = AF_INET6; 94453541Sshin sin6->sin6_addr = ip->ip6_src; 94553541Sshin 946148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 947148385Sume 94853541Sshin return; 94953541Sshin} 950