in6_pcb.c revision 95023
162587Sitojun/* $FreeBSD: head/sys/netinet6/in6_pcb.c 95023 2002-04-19 04:46:24Z suz $ */ 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 * 3. All advertising materials mentioning features or use of this software 4753541Sshin * must display the following acknowledgement: 4853541Sshin * This product includes software developed by the University of 4953541Sshin * California, Berkeley and its contributors. 5053541Sshin * 4. Neither the name of the University nor the names of its contributors 5153541Sshin * may be used to endorse or promote products derived from this software 5253541Sshin * without specific prior written permission. 5353541Sshin * 5453541Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5553541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5653541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5753541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5853541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5953541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6053541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6153541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6253541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6353541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6453541Sshin * SUCH DAMAGE. 6553541Sshin * 6653541Sshin * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 6753541Sshin */ 6853541Sshin 6978064Sume#include "opt_inet.h" 7078064Sume#include "opt_inet6.h" 7155009Sshin#include "opt_ipsec.h" 7253541Sshin 7353541Sshin#include <sys/param.h> 7453541Sshin#include <sys/systm.h> 7553541Sshin#include <sys/malloc.h> 7653541Sshin#include <sys/mbuf.h> 7755679Sshin#include <sys/domain.h> 7853541Sshin#include <sys/protosw.h> 7953541Sshin#include <sys/socket.h> 8053541Sshin#include <sys/socketvar.h> 8153541Sshin#include <sys/sockio.h> 8253541Sshin#include <sys/errno.h> 8353541Sshin#include <sys/time.h> 8453541Sshin#include <sys/proc.h> 8553541Sshin#include <sys/jail.h> 8653541Sshin 8792767Sjeff#include <vm/uma.h> 8853541Sshin 8953541Sshin#include <net/if.h> 9053541Sshin#include <net/if_types.h> 9153541Sshin#include <net/route.h> 9253541Sshin 9353541Sshin#include <netinet/in.h> 9453541Sshin#include <netinet/in_var.h> 9553541Sshin#include <netinet/in_systm.h> 9662587Sitojun#include <netinet/ip6.h> 9755679Sshin#include <netinet/ip_var.h> 9853541Sshin#include <netinet6/ip6_var.h> 9953541Sshin#include <netinet6/nd6.h> 10053541Sshin#include <netinet/in_pcb.h> 10153541Sshin#include <netinet6/in6_pcb.h> 10253541Sshin 10353541Sshin#ifdef IPSEC 10453541Sshin#include <netinet6/ipsec.h> 10578064Sume#ifdef INET6 10678064Sume#include <netinet6/ipsec6.h> 10778064Sume#endif 10855009Sshin#include <netinet6/ah.h> 10978064Sume#ifdef INET6 11055009Sshin#include <netinet6/ah6.h> 11178064Sume#endif 11253541Sshin#include <netkey/key.h> 11353541Sshin#endif /* IPSEC */ 11453541Sshin 11553541Sshinstruct in6_addr zeroin6_addr; 11653541Sshin 11753541Sshinint 11883366Sjulianin6_pcbbind(inp, nam, td) 11953541Sshin register struct inpcb *inp; 12053541Sshin struct sockaddr *nam; 12183366Sjulian struct thread *td; 12253541Sshin{ 12353541Sshin struct socket *so = inp->inp_socket; 12453541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 12553541Sshin struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 12653541Sshin u_short lport = 0; 12753541Sshin int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 12853541Sshin 12953541Sshin if (!in6_ifaddr) /* XXX broken! */ 13053541Sshin return (EADDRNOTAVAIL); 13153541Sshin if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 13253541Sshin return(EINVAL); 13353541Sshin if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 13453541Sshin wild = 1; 13553541Sshin if (nam) { 13653541Sshin sin6 = (struct sockaddr_in6 *)nam; 13753541Sshin if (nam->sa_len != sizeof(*sin6)) 13853541Sshin return(EINVAL); 13953541Sshin /* 14053541Sshin * family check. 14153541Sshin */ 14253541Sshin if (nam->sa_family != AF_INET6) 14353541Sshin return(EAFNOSUPPORT); 14453541Sshin 14562587Sitojun /* KAME hack: embed scopeid */ 14662587Sitojun if (in6_embedscope(&sin6->sin6_addr, sin6, inp, NULL) != 0) 14762587Sitojun return EINVAL; 14862587Sitojun /* this must be cleared for ifa_ifwithaddr() */ 14962587Sitojun sin6->sin6_scope_id = 0; 15053541Sshin 15153541Sshin lport = sin6->sin6_port; 15253541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 15353541Sshin /* 15453541Sshin * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 15553541Sshin * allow compepte duplication of binding if 15653541Sshin * SO_REUSEPORT is set, or if SO_REUSEADDR is set 15753541Sshin * and a multicast address is bound on both 15853541Sshin * new and duplicated sockets. 15953541Sshin */ 16053541Sshin if (so->so_options & SO_REUSEADDR) 16153541Sshin reuseport = SO_REUSEADDR|SO_REUSEPORT; 16253541Sshin } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 16353541Sshin struct ifaddr *ia = NULL; 16453541Sshin 16553541Sshin sin6->sin6_port = 0; /* yech... */ 16653541Sshin if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 16753541Sshin return(EADDRNOTAVAIL); 16853541Sshin 16953541Sshin /* 17053541Sshin * XXX: bind to an anycast address might accidentally 17153541Sshin * cause sending a packet with anycast source address. 17278064Sume * We should allow to bind to a deprecated address, since 17378064Sume * the application dare to use it. 17453541Sshin */ 17553541Sshin if (ia && 17653541Sshin ((struct in6_ifaddr *)ia)->ia6_flags & 17778064Sume (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 17853541Sshin return(EADDRNOTAVAIL); 17953541Sshin } 18053541Sshin } 18153541Sshin if (lport) { 18253541Sshin struct inpcb *t; 18353541Sshin 18453541Sshin /* GROSS */ 18583366Sjulian if (ntohs(lport) < IPV6PORT_RESERVED && td && 18693593Sjhb suser_cred(td->td_ucred, PRISON_ROOT)) 18753541Sshin return(EACCES); 18853541Sshin if (so->so_cred->cr_uid != 0 && 18953541Sshin !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 19055679Sshin t = in6_pcblookup_local(pcbinfo, 19153541Sshin &sin6->sin6_addr, lport, 19253541Sshin INPLOOKUP_WILDCARD); 19353541Sshin if (t && 19453541Sshin (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 19553541Sshin !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 19653541Sshin (t->inp_socket->so_options & 19753541Sshin SO_REUSEPORT) == 0) && 19853541Sshin (so->so_cred->cr_uid != 19953541Sshin t->inp_socket->so_cred->cr_uid)) 20053541Sshin return (EADDRINUSE); 20178064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 20255679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 20355679Sshin struct sockaddr_in sin; 20455679Sshin 20555679Sshin in6_sin6_2_sin(&sin, sin6); 20655679Sshin t = in_pcblookup_local(pcbinfo, 20755679Sshin sin.sin_addr, lport, 20855679Sshin INPLOOKUP_WILDCARD); 20955679Sshin if (t && 21055679Sshin (so->so_cred->cr_uid != 21155679Sshin t->inp_socket->so_cred->cr_uid) && 21255679Sshin (ntohl(t->inp_laddr.s_addr) != 21355679Sshin INADDR_ANY || 21455679Sshin INP_SOCKAF(so) == 21555679Sshin INP_SOCKAF(t->inp_socket))) 21655679Sshin return (EADDRINUSE); 21755679Sshin } 21853541Sshin } 21953541Sshin t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 22053541Sshin lport, wild); 22153541Sshin if (t && (reuseport & t->inp_socket->so_options) == 0) 22253541Sshin return(EADDRINUSE); 22378064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 22455679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 22555679Sshin struct sockaddr_in sin; 22655679Sshin 22755679Sshin in6_sin6_2_sin(&sin, sin6); 22855679Sshin t = in_pcblookup_local(pcbinfo, sin.sin_addr, 22955679Sshin lport, wild); 23055679Sshin if (t && 23155679Sshin (reuseport & t->inp_socket->so_options) 23255679Sshin == 0 && 23355679Sshin (ntohl(t->inp_laddr.s_addr) 23455679Sshin != INADDR_ANY || 23555679Sshin INP_SOCKAF(so) == 23655679Sshin INP_SOCKAF(t->inp_socket))) 23755679Sshin return (EADDRINUSE); 23855679Sshin } 23953541Sshin } 24053541Sshin inp->in6p_laddr = sin6->sin6_addr; 24153541Sshin } 24253541Sshin if (lport == 0) { 24362587Sitojun int e; 24483366Sjulian if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, td)) != 0) 24562587Sitojun return(e); 24662587Sitojun } 24762587Sitojun else { 24862587Sitojun inp->inp_lport = lport; 24962587Sitojun if (in_pcbinshash(inp) != 0) { 25062587Sitojun inp->in6p_laddr = in6addr_any; 25162587Sitojun inp->inp_lport = 0; 25262587Sitojun return (EAGAIN); 25353541Sshin } 25453541Sshin } 25553541Sshin return(0); 25653541Sshin} 25753541Sshin 25853541Sshin/* 25953541Sshin * Transform old in6_pcbconnect() into an inner subroutine for new 26053541Sshin * in6_pcbconnect(): Do some validity-checking on the remote 26153541Sshin * address (in mbuf 'nam') and then determine local host address 26253541Sshin * (i.e., which interface) to use to access that remote host. 26353541Sshin * 26453541Sshin * This preserves definition of in6_pcbconnect(), while supporting a 26553541Sshin * slightly different version for T/TCP. (This is more than 26653541Sshin * a bit of a kludge, but cleaning up the internal interfaces would 26753541Sshin * have forced minor changes in every protocol). 26853541Sshin */ 26953541Sshin 27053541Sshinint 27153541Sshinin6_pcbladdr(inp, nam, plocal_addr6) 27253541Sshin register struct inpcb *inp; 27353541Sshin struct sockaddr *nam; 27453541Sshin struct in6_addr **plocal_addr6; 27553541Sshin{ 27653541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 27753541Sshin struct ifnet *ifp = NULL; 27853541Sshin int error = 0; 27953541Sshin 28053541Sshin if (nam->sa_len != sizeof (*sin6)) 28153541Sshin return (EINVAL); 28253541Sshin if (sin6->sin6_family != AF_INET6) 28353541Sshin return (EAFNOSUPPORT); 28453541Sshin if (sin6->sin6_port == 0) 28553541Sshin return (EADDRNOTAVAIL); 28653541Sshin 28762587Sitojun /* KAME hack: embed scopeid */ 28862587Sitojun if (in6_embedscope(&sin6->sin6_addr, sin6, inp, &ifp) != 0) 28962587Sitojun return EINVAL; 29053541Sshin 29153541Sshin if (in6_ifaddr) { 29253541Sshin /* 29353541Sshin * If the destination address is UNSPECIFIED addr, 29453541Sshin * use the loopback addr, e.g ::1. 29553541Sshin */ 29653541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 29753541Sshin sin6->sin6_addr = in6addr_loopback; 29853541Sshin } 29953541Sshin { 30053541Sshin /* 30153541Sshin * XXX: in6_selectsrc might replace the bound local address 30253541Sshin * with the address specified by setsockopt(IPV6_PKTINFO). 30353541Sshin * Is it the intended behavior? 30453541Sshin */ 30553541Sshin *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, 30653541Sshin inp->in6p_moptions, 30753541Sshin &inp->in6p_route, 30853541Sshin &inp->in6p_laddr, &error); 30953541Sshin if (*plocal_addr6 == 0) { 31053541Sshin if (error == 0) 31153541Sshin error = EADDRNOTAVAIL; 31253541Sshin return(error); 31353541Sshin } 31453541Sshin /* 31553541Sshin * Don't do pcblookup call here; return interface in 31653541Sshin * plocal_addr6 31753541Sshin * and exit to caller, that will do the lookup. 31853541Sshin */ 31953541Sshin } 32053541Sshin 32153541Sshin if (inp->in6p_route.ro_rt) 32253541Sshin ifp = inp->in6p_route.ro_rt->rt_ifp; 32353541Sshin 32453541Sshin return(0); 32553541Sshin} 32653541Sshin 32753541Sshin/* 32853541Sshin * Outer subroutine: 32953541Sshin * Connect from a socket to a specified address. 33053541Sshin * Both address and port must be specified in argument sin. 33153541Sshin * If don't have a local address for this socket yet, 33253541Sshin * then pick one. 33353541Sshin */ 33453541Sshinint 33583366Sjulianin6_pcbconnect(inp, nam, td) 33653541Sshin register struct inpcb *inp; 33753541Sshin struct sockaddr *nam; 33883366Sjulian struct thread *td; 33953541Sshin{ 34053541Sshin struct in6_addr *addr6; 34153541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 34253541Sshin int error; 34353541Sshin 34453541Sshin /* 34595023Ssuz * Call inner routine, to assign local interface address. 34695023Ssuz * in6_pcbladdr() may automatically fill in sin6_scope_id. 34753541Sshin */ 34853541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 34953541Sshin return(error); 35053541Sshin 35153541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 35253541Sshin sin6->sin6_port, 35353541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 35453541Sshin ? addr6 : &inp->in6p_laddr, 35553541Sshin inp->inp_lport, 0, NULL) != NULL) { 35653541Sshin return (EADDRINUSE); 35753541Sshin } 35853541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 35953541Sshin if (inp->inp_lport == 0) { 36083366Sjulian error = in6_pcbbind(inp, (struct sockaddr *)0, td); 36153541Sshin if (error) 36253541Sshin return (error); 36353541Sshin } 36453541Sshin inp->in6p_laddr = *addr6; 36553541Sshin } 36653541Sshin inp->in6p_faddr = sin6->sin6_addr; 36753541Sshin inp->inp_fport = sin6->sin6_port; 36878064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 36978064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 37078064Sume if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 37155679Sshin inp->in6p_flowinfo |= 37278064Sume (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 37353541Sshin 37453541Sshin in_pcbrehash(inp); 37553541Sshin return (0); 37653541Sshin} 37753541Sshin 37862587Sitojun#if 0 37953541Sshin/* 38053541Sshin * Return an IPv6 address, which is the most appropriate for given 38153541Sshin * destination and user specified options. 38253541Sshin * If necessary, this function lookups the routing table and return 38353541Sshin * an entry to the caller for later use. 38453541Sshin */ 38553541Sshinstruct in6_addr * 38653541Sshinin6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp) 38753541Sshin struct sockaddr_in6 *dstsock; 38853541Sshin struct ip6_pktopts *opts; 38953541Sshin struct ip6_moptions *mopts; 39053541Sshin struct route_in6 *ro; 39153541Sshin struct in6_addr *laddr; 39253541Sshin int *errorp; 39353541Sshin{ 39453541Sshin struct in6_addr *dst; 39553541Sshin struct in6_ifaddr *ia6 = 0; 39653541Sshin struct in6_pktinfo *pi = NULL; 39753541Sshin 39853541Sshin dst = &dstsock->sin6_addr; 39953541Sshin *errorp = 0; 40053541Sshin 40153541Sshin /* 40253541Sshin * If the source address is explicitly specified by the caller, 40353541Sshin * use it. 40453541Sshin */ 40553541Sshin if (opts && (pi = opts->ip6po_pktinfo) && 40653541Sshin !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) 40753541Sshin return(&pi->ipi6_addr); 40853541Sshin 40953541Sshin /* 41053541Sshin * If the source address is not specified but the socket(if any) 41153541Sshin * is already bound, use the bound address. 41253541Sshin */ 41353541Sshin if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) 41453541Sshin return(laddr); 41553541Sshin 41653541Sshin /* 41753541Sshin * If the caller doesn't specify the source address but 41853541Sshin * the outgoing interface, use an address associated with 41953541Sshin * the interface. 42053541Sshin */ 42153541Sshin if (pi && pi->ipi6_ifindex) { 42253541Sshin /* XXX boundary check is assumed to be already done. */ 42383130Sjlemon ia6 = in6_ifawithscope(ifnet_byindex(pi->ipi6_ifindex), dst); 42453541Sshin if (ia6 == 0) { 42553541Sshin *errorp = EADDRNOTAVAIL; 42653541Sshin return(0); 42753541Sshin } 42853541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 42953541Sshin } 43053541Sshin 43153541Sshin /* 43253541Sshin * If the destination address is a link-local unicast address or 43353541Sshin * a multicast address, and if the outgoing interface is specified 43453541Sshin * by the sin6_scope_id filed, use an address associated with the 43553541Sshin * interface. 43653541Sshin * XXX: We're now trying to define more specific semantics of 43753541Sshin * sin6_scope_id field, so this part will be rewritten in 43853541Sshin * the near future. 43953541Sshin */ 44053541Sshin if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 44153541Sshin dstsock->sin6_scope_id) { 44253541Sshin /* 44353541Sshin * I'm not sure if boundary check for scope_id is done 44453541Sshin * somewhere... 44553541Sshin */ 44653541Sshin if (dstsock->sin6_scope_id < 0 || 44753541Sshin if_index < dstsock->sin6_scope_id) { 44853541Sshin *errorp = ENXIO; /* XXX: better error? */ 44953541Sshin return(0); 45053541Sshin } 45183130Sjlemon ia6 = in6_ifawithscope(ifnet_byindex(dstsock->sin6_scope_id), 45253541Sshin dst); 45353541Sshin if (ia6 == 0) { 45453541Sshin *errorp = EADDRNOTAVAIL; 45553541Sshin return(0); 45653541Sshin } 45753541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 45853541Sshin } 45953541Sshin 46053541Sshin /* 46153541Sshin * If the destination address is a multicast address and 46253541Sshin * the outgoing interface for the address is specified 46353541Sshin * by the caller, use an address associated with the interface. 46453541Sshin * There is a sanity check here; if the destination has node-local 46553541Sshin * scope, the outgoing interfacde should be a loopback address. 46653541Sshin * Even if the outgoing interface is not specified, we also 46753541Sshin * choose a loopback interface as the outgoing interface. 46853541Sshin */ 46953541Sshin if (IN6_IS_ADDR_MULTICAST(dst)) { 47053541Sshin struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 47153541Sshin 47253541Sshin if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 47353541Sshin ifp = &loif[0]; 47453541Sshin } 47553541Sshin 47653541Sshin if (ifp) { 47753541Sshin ia6 = in6_ifawithscope(ifp, dst); 47853541Sshin if (ia6 == 0) { 47953541Sshin *errorp = EADDRNOTAVAIL; 48053541Sshin return(0); 48153541Sshin } 48253541Sshin return(&ia6->ia_addr.sin6_addr); 48353541Sshin } 48453541Sshin } 48553541Sshin 48653541Sshin /* 48753541Sshin * If the next hop address for the packet is specified 48853541Sshin * by caller, use an address associated with the route 48953541Sshin * to the next hop. 49053541Sshin */ 49153541Sshin { 49253541Sshin struct sockaddr_in6 *sin6_next; 49353541Sshin struct rtentry *rt; 49453541Sshin 49553541Sshin if (opts && opts->ip6po_nexthop) { 49653541Sshin sin6_next = satosin6(opts->ip6po_nexthop); 49753541Sshin rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 49853541Sshin if (rt) { 49953541Sshin ia6 = in6_ifawithscope(rt->rt_ifp, dst); 50053541Sshin if (ia6 == 0) 50153541Sshin ia6 = ifatoia6(rt->rt_ifa); 50253541Sshin } 50353541Sshin if (ia6 == 0) { 50453541Sshin *errorp = EADDRNOTAVAIL; 50553541Sshin return(0); 50653541Sshin } 50753541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 50853541Sshin } 50953541Sshin } 51053541Sshin 51153541Sshin /* 51253541Sshin * If route is known or can be allocated now, 51353541Sshin * our src addr is taken from the i/f, else punt. 51453541Sshin */ 51553541Sshin if (ro) { 51653541Sshin if (ro->ro_rt && 51753541Sshin !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 51853541Sshin RTFREE(ro->ro_rt); 51953541Sshin ro->ro_rt = (struct rtentry *)0; 52053541Sshin } 52153541Sshin if (ro->ro_rt == (struct rtentry *)0 || 52253541Sshin ro->ro_rt->rt_ifp == (struct ifnet *)0) { 52378064Sume struct sockaddr_in6 *dst6; 52478064Sume 52553541Sshin /* No route yet, so try to acquire one */ 52653541Sshin bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 52778064Sume dst6 = (struct sockaddr_in6 *)&ro->ro_dst; 52878064Sume dst6->sin6_family = AF_INET6; 52978064Sume dst6->sin6_len = sizeof(struct sockaddr_in6); 53078064Sume dst6->sin6_addr = *dst; 53153541Sshin if (IN6_IS_ADDR_MULTICAST(dst)) { 53253541Sshin ro->ro_rt = rtalloc1(&((struct route *)ro) 53353541Sshin ->ro_dst, 0, 0UL); 53453541Sshin } else { 53554350Sshin rtalloc((struct route *)ro); 53653541Sshin } 53753541Sshin } 53853541Sshin 53953541Sshin /* 54053541Sshin * in_pcbconnect() checks out IFF_LOOPBACK to skip using 54153541Sshin * the address. But we don't know why it does so. 54253541Sshin * It is necessary to ensure the scope even for lo0 54353541Sshin * so doesn't check out IFF_LOOPBACK. 54453541Sshin */ 54553541Sshin 54653541Sshin if (ro->ro_rt) { 54753541Sshin ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 54853541Sshin if (ia6 == 0) /* xxx scope error ?*/ 54953541Sshin ia6 = ifatoia6(ro->ro_rt->rt_ifa); 55053541Sshin } 55153541Sshin if (ia6 == 0) { 55253541Sshin *errorp = EHOSTUNREACH; /* no route */ 55353541Sshin return(0); 55453541Sshin } 55553541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 55653541Sshin } 55753541Sshin 55853541Sshin *errorp = EADDRNOTAVAIL; 55953541Sshin return(0); 56053541Sshin} 56153541Sshin 56253541Sshin/* 56353541Sshin * Default hop limit selection. The precedence is as follows: 56453541Sshin * 1. Hoplimit valued specified via ioctl. 56553541Sshin * 2. (If the outgoing interface is detected) the current 56653541Sshin * hop limit of the interface specified by router advertisement. 56753541Sshin * 3. The system default hoplimit. 56853541Sshin*/ 56953541Sshinint 57053541Sshinin6_selecthlim(in6p, ifp) 57153541Sshin struct in6pcb *in6p; 57253541Sshin struct ifnet *ifp; 57353541Sshin{ 57453541Sshin if (in6p && in6p->in6p_hops >= 0) 57553541Sshin return(in6p->in6p_hops); 57653541Sshin else if (ifp) 57753541Sshin return(nd_ifinfo[ifp->if_index].chlim); 57853541Sshin else 57953541Sshin return(ip6_defhlim); 58053541Sshin} 58162587Sitojun#endif 58253541Sshin 58353541Sshinvoid 58453541Sshinin6_pcbdisconnect(inp) 58553541Sshin struct inpcb *inp; 58653541Sshin{ 58753541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 58853541Sshin inp->inp_fport = 0; 58978064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 59078064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 59153541Sshin in_pcbrehash(inp); 59253541Sshin if (inp->inp_socket->so_state & SS_NOFDREF) 59353541Sshin in6_pcbdetach(inp); 59453541Sshin} 59553541Sshin 59653541Sshinvoid 59753541Sshinin6_pcbdetach(inp) 59853541Sshin struct inpcb *inp; 59953541Sshin{ 60053541Sshin struct socket *so = inp->inp_socket; 60153541Sshin struct inpcbinfo *ipi = inp->inp_pcbinfo; 60253541Sshin 60353541Sshin#ifdef IPSEC 60458452Sgreen if (inp->in6p_sp != NULL) 60558452Sgreen ipsec6_delete_pcbpolicy(inp); 60653541Sshin#endif /* IPSEC */ 60753541Sshin inp->inp_gencnt = ++ipi->ipi_gencnt; 60853541Sshin in_pcbremlists(inp); 60953541Sshin sotoinpcb(so) = 0; 61086487Sdillon sotryfree(so); 61178064Sume 61253541Sshin if (inp->in6p_options) 61353541Sshin m_freem(inp->in6p_options); 61478064Sume ip6_freepcbopts(inp->in6p_outputopts); 61578064Sume ip6_freemoptions(inp->in6p_moptions); 61653541Sshin if (inp->in6p_route.ro_rt) 61753541Sshin rtfree(inp->in6p_route.ro_rt); 61855679Sshin /* Check and free IPv4 related resources in case of mapped addr */ 61955679Sshin if (inp->inp_options) 62055679Sshin (void)m_free(inp->inp_options); 62155679Sshin ip_freemoptions(inp->inp_moptions); 62255679Sshin 62353541Sshin inp->inp_vflag = 0; 62492767Sjeff uma_zfree(ipi->ipi_zone, inp); 62553541Sshin} 62653541Sshin 62753541Sshin/* 62853541Sshin * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 62953541Sshin * modified to match the pru_sockaddr() and pru_peeraddr() entry points 63053541Sshin * in struct pr_usrreqs, so that protocols can just reference then directly 63153541Sshin * without the need for a wrapper function. The socket must have a valid 63253541Sshin * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 63353541Sshin * except through a kernel programming error, so it is acceptable to panic 63453541Sshin * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 63553541Sshin * because there actually /is/ a programming error somewhere... XXX) 63653541Sshin */ 63753541Sshinint 63853541Sshinin6_setsockaddr(so, nam) 63953541Sshin struct socket *so; 64053541Sshin struct sockaddr **nam; 64153541Sshin{ 64253541Sshin int s; 64353541Sshin register struct inpcb *inp; 64453541Sshin register struct sockaddr_in6 *sin6; 64553541Sshin 64653541Sshin /* 64753541Sshin * Do the malloc first in case it blocks. 64853541Sshin */ 64953541Sshin MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 65053541Sshin bzero(sin6, sizeof *sin6); 65153541Sshin sin6->sin6_family = AF_INET6; 65253541Sshin sin6->sin6_len = sizeof(*sin6); 65353541Sshin 65453541Sshin s = splnet(); 65553541Sshin inp = sotoinpcb(so); 65653541Sshin if (!inp) { 65753541Sshin splx(s); 65853541Sshin free(sin6, M_SONAME); 65953541Sshin return EINVAL; 66053541Sshin } 66153541Sshin sin6->sin6_port = inp->inp_lport; 66253541Sshin sin6->sin6_addr = inp->in6p_laddr; 66353541Sshin splx(s); 66453541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 66553541Sshin sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 66653541Sshin else 66753541Sshin sin6->sin6_scope_id = 0; /*XXX*/ 66853541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 66953541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 67053541Sshin 67153541Sshin *nam = (struct sockaddr *)sin6; 67253541Sshin return 0; 67353541Sshin} 67453541Sshin 67553541Sshinint 67653541Sshinin6_setpeeraddr(so, nam) 67753541Sshin struct socket *so; 67853541Sshin struct sockaddr **nam; 67953541Sshin{ 68053541Sshin int s; 68153541Sshin struct inpcb *inp; 68253541Sshin register struct sockaddr_in6 *sin6; 68353541Sshin 68453541Sshin /* 68553541Sshin * Do the malloc first in case it blocks. 68653541Sshin */ 68753541Sshin MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK); 68853541Sshin bzero((caddr_t)sin6, sizeof (*sin6)); 68953541Sshin sin6->sin6_family = AF_INET6; 69053541Sshin sin6->sin6_len = sizeof(struct sockaddr_in6); 69153541Sshin 69253541Sshin s = splnet(); 69353541Sshin inp = sotoinpcb(so); 69453541Sshin if (!inp) { 69553541Sshin splx(s); 69653541Sshin free(sin6, M_SONAME); 69753541Sshin return EINVAL; 69853541Sshin } 69953541Sshin sin6->sin6_port = inp->inp_fport; 70053541Sshin sin6->sin6_addr = inp->in6p_faddr; 70153541Sshin splx(s); 70253541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 70353541Sshin sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 70453541Sshin else 70553541Sshin sin6->sin6_scope_id = 0; /*XXX*/ 70653541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 70753541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 70853541Sshin 70953541Sshin *nam = (struct sockaddr *)sin6; 71053541Sshin return 0; 71153541Sshin} 71253541Sshin 71353541Sshinint 71453541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 71553541Sshin{ 71653541Sshin struct inpcb *inp = sotoinpcb(so); 71753541Sshin int error; 71853541Sshin 71953541Sshin if (inp == NULL) 72053541Sshin return EINVAL; 72153541Sshin if (inp->inp_vflag & INP_IPV4) { 72253541Sshin error = in_setsockaddr(so, nam); 72354952Seivind if (error == 0) 72453541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 72553541Sshin } else 72695023Ssuz /* scope issues will be handled in in6_setsockaddr(). */ 72753541Sshin error = in6_setsockaddr(so, nam); 72853541Sshin 72953541Sshin return error; 73053541Sshin} 73153541Sshin 73253541Sshinint 73353541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 73453541Sshin{ 73553541Sshin struct inpcb *inp = sotoinpcb(so); 73653541Sshin int error; 73753541Sshin 73853541Sshin if (inp == NULL) 73953541Sshin return EINVAL; 74053541Sshin if (inp->inp_vflag & INP_IPV4) { 74153541Sshin error = in_setpeeraddr(so, nam); 74254952Seivind if (error == 0) 74353541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 74453541Sshin } else 74595023Ssuz /* scope issues will be handled in in6_setpeeraddr(). */ 74653541Sshin error = in6_setpeeraddr(so, nam); 74753541Sshin 74853541Sshin return error; 74953541Sshin} 75053541Sshin 75153541Sshin/* 75253541Sshin * Pass some notification to all connections of a protocol 75353541Sshin * associated with address dst. The local address and/or port numbers 75453541Sshin * may be specified to limit the search. The "usual action" will be 75553541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 75653541Sshin * cmds that are uninteresting (e.g., no error in the map). 75753541Sshin * Call the protocol specific routine (if any) to report 75853541Sshin * any errors for each matching socket. 75953541Sshin * 76053541Sshin * Must be called at splnet. 76153541Sshin */ 76253541Sshinvoid 76378064Sumein6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify) 76453541Sshin struct inpcbhead *head; 76591346Salfred struct sockaddr *dst; 76691346Salfred const struct sockaddr *src; 76753541Sshin u_int fport_arg, lport_arg; 76853541Sshin int cmd; 76953541Sshin void (*notify) __P((struct inpcb *, int)); 77053541Sshin{ 77162587Sitojun struct inpcb *inp, *ninp; 77278064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 77353541Sshin u_short fport = fport_arg, lport = lport_arg; 77478064Sume u_int32_t flowinfo; 77553541Sshin int errno, s; 77653541Sshin 77753541Sshin if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 77853541Sshin return; 77978064Sume 78078064Sume sa6_dst = (struct sockaddr_in6 *)dst; 78178064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 78253541Sshin return; 78353541Sshin 78453541Sshin /* 78578064Sume * note that src can be NULL when we get notify by local fragmentation. 78678064Sume */ 78791346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 78878064Sume flowinfo = sa6_src.sin6_flowinfo; 78978064Sume 79078064Sume /* 79153541Sshin * Redirects go to all references to the destination, 79262587Sitojun * and use in6_rtchange to invalidate the route cache. 79362587Sitojun * Dead host indications: also use in6_rtchange to invalidate 79462587Sitojun * the cache, and deliver the error to all the sockets. 79553541Sshin * Otherwise, if we have knowledge of the local port and address, 79653541Sshin * deliver only to that socket. 79753541Sshin */ 79853541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 79953541Sshin fport = 0; 80053541Sshin lport = 0; 80178064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 80262587Sitojun 80378064Sume if (cmd != PRC_HOSTDEAD) 80478064Sume notify = in6_rtchange; 80553541Sshin } 80653541Sshin errno = inet6ctlerrmap[cmd]; 80753541Sshin s = splnet(); 80862587Sitojun for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 80962587Sitojun ninp = LIST_NEXT(inp, inp_list); 81062587Sitojun 81178064Sume if ((inp->inp_vflag & INP_IPV6) == 0) 81253541Sshin continue; 81362587Sitojun 81478064Sume /* 81578064Sume * Detect if we should notify the error. If no source and 81678064Sume * destination ports are specifed, but non-zero flowinfo and 81778064Sume * local address match, notify the error. This is the case 81878064Sume * when the error is delivered with an encrypted buffer 81978064Sume * by ESP. Otherwise, just compare addresses and ports 82078064Sume * as usual. 82178064Sume */ 82278064Sume if (lport == 0 && fport == 0 && flowinfo && 82378064Sume inp->inp_socket != NULL && 82478064Sume flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 82578064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 82678064Sume goto do_notify; 82778064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 82878064Sume &sa6_dst->sin6_addr) || 82978064Sume inp->inp_socket == 0 || 83078064Sume (lport && inp->inp_lport != lport) || 83178064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 83278064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 83378064Sume &sa6_src.sin6_addr)) || 83478064Sume (fport && inp->inp_fport != fport)) 83553541Sshin continue; 83662587Sitojun 83778064Sume do_notify: 83853541Sshin if (notify) 83978064Sume (*notify)(inp, errno); 84053541Sshin } 84153541Sshin splx(s); 84253541Sshin} 84353541Sshin 84453541Sshin/* 84553541Sshin * Lookup a PCB based on the local address and port. 84653541Sshin */ 84753541Sshinstruct inpcb * 84853541Sshinin6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 84953541Sshin struct inpcbinfo *pcbinfo; 85053541Sshin struct in6_addr *laddr; 85153541Sshin u_int lport_arg; 85253541Sshin int wild_okay; 85353541Sshin{ 85453541Sshin register struct inpcb *inp; 85553541Sshin int matchwild = 3, wildcard; 85653541Sshin u_short lport = lport_arg; 85753541Sshin 85853541Sshin if (!wild_okay) { 85953541Sshin struct inpcbhead *head; 86053541Sshin /* 86153541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 86253541Sshin * matches the local address and port we're looking for. 86353541Sshin */ 86453541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 86553541Sshin pcbinfo->hashmask)]; 86653541Sshin LIST_FOREACH(inp, head, inp_hash) { 86754952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 86853541Sshin continue; 86953541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 87053541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 87153541Sshin inp->inp_lport == lport) { 87253541Sshin /* 87353541Sshin * Found. 87453541Sshin */ 87553541Sshin return (inp); 87653541Sshin } 87753541Sshin } 87853541Sshin /* 87953541Sshin * Not found. 88053541Sshin */ 88153541Sshin return (NULL); 88253541Sshin } else { 88353541Sshin struct inpcbporthead *porthash; 88453541Sshin struct inpcbport *phd; 88553541Sshin struct inpcb *match = NULL; 88653541Sshin /* 88753541Sshin * Best fit PCB lookup. 88853541Sshin * 88953541Sshin * First see if this local port is in use by looking on the 89053541Sshin * port hash list. 89153541Sshin */ 89253541Sshin porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 89353541Sshin pcbinfo->porthashmask)]; 89453541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 89553541Sshin if (phd->phd_port == lport) 89653541Sshin break; 89753541Sshin } 89853541Sshin if (phd != NULL) { 89953541Sshin /* 90053541Sshin * Port is in use by one or more PCBs. Look for best 90153541Sshin * fit. 90253541Sshin */ 90353541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 90453541Sshin wildcard = 0; 90554952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 90653541Sshin continue; 90753541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 90853541Sshin wildcard++; 90953541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 91053541Sshin &inp->in6p_laddr)) { 91153541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 91253541Sshin wildcard++; 91353541Sshin else if (!IN6_ARE_ADDR_EQUAL( 91453541Sshin &inp->in6p_laddr, laddr)) 91553541Sshin continue; 91653541Sshin } else { 91753541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 91853541Sshin wildcard++; 91953541Sshin } 92053541Sshin if (wildcard < matchwild) { 92153541Sshin match = inp; 92253541Sshin matchwild = wildcard; 92353541Sshin if (matchwild == 0) { 92453541Sshin break; 92553541Sshin } 92653541Sshin } 92753541Sshin } 92853541Sshin } 92953541Sshin return (match); 93053541Sshin } 93153541Sshin} 93253541Sshin 93381127Sumevoid 93481127Sumein6_pcbpurgeif0(head, ifp) 93581127Sume struct in6pcb *head; 93681127Sume struct ifnet *ifp; 93781127Sume{ 93881127Sume struct in6pcb *in6p; 93981127Sume struct ip6_moptions *im6o; 94081127Sume struct in6_multi_mship *imm, *nimm; 94181127Sume 94281127Sume for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 94381127Sume im6o = in6p->in6p_moptions; 94481127Sume if ((in6p->inp_vflag & INP_IPV6) && 94581127Sume im6o) { 94681127Sume /* 94781127Sume * Unselect the outgoing interface if it is being 94881127Sume * detached. 94981127Sume */ 95081127Sume if (im6o->im6o_multicast_ifp == ifp) 95181127Sume im6o->im6o_multicast_ifp = NULL; 95281127Sume 95381127Sume /* 95481127Sume * Drop multicast group membership if we joined 95581127Sume * through the interface being detached. 95681127Sume * XXX controversial - is it really legal for kernel 95781127Sume * to force this? 95881127Sume */ 95981127Sume for (imm = im6o->im6o_memberships.lh_first; 96081127Sume imm != NULL; imm = nimm) { 96181127Sume nimm = imm->i6mm_chain.le_next; 96281127Sume if (imm->i6mm_maddr->in6m_ifp == ifp) { 96381127Sume LIST_REMOVE(imm, i6mm_chain); 96481127Sume in6_delmulti(imm->i6mm_maddr); 96581127Sume free(imm, M_IPMADDR); 96681127Sume } 96781127Sume } 96881127Sume } 96981127Sume } 97081127Sume} 97181127Sume 97253541Sshin/* 97353541Sshin * Check for alternatives when higher level complains 97453541Sshin * about service problems. For now, invalidate cached 97553541Sshin * routing information. If the route was created dynamically 97653541Sshin * (by a redirect), time to try a default gateway again. 97753541Sshin */ 97853541Sshinvoid 97953541Sshinin6_losing(in6p) 98053541Sshin struct inpcb *in6p; 98153541Sshin{ 98253541Sshin struct rtentry *rt; 98353541Sshin struct rt_addrinfo info; 98453541Sshin 98553541Sshin if ((rt = in6p->in6p_route.ro_rt) != NULL) { 98653541Sshin bzero((caddr_t)&info, sizeof(info)); 98785074Sru info.rti_flags = rt->rt_flags; 98885074Sru info.rti_info[RTAX_DST] = rt_key(rt); 98953541Sshin info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 99053541Sshin info.rti_info[RTAX_NETMASK] = rt_mask(rt); 99153541Sshin rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 99253541Sshin if (rt->rt_flags & RTF_DYNAMIC) 99385074Sru (void)rtrequest1(RTM_DELETE, &info, NULL); 99485072Sru in6p->in6p_route.ro_rt = NULL; 99585072Sru rtfree(rt); 99653541Sshin /* 99753541Sshin * A new route can be allocated 99853541Sshin * the next time output is attempted. 99953541Sshin */ 100053541Sshin } 100153541Sshin} 100253541Sshin 100353541Sshin/* 100453541Sshin * After a routing change, flush old routing 100553541Sshin * and allocate a (hopefully) better one. 100653541Sshin */ 100753541Sshinvoid 100853541Sshinin6_rtchange(inp, errno) 100953541Sshin struct inpcb *inp; 101053541Sshin int errno; 101153541Sshin{ 101253541Sshin if (inp->in6p_route.ro_rt) { 101353541Sshin rtfree(inp->in6p_route.ro_rt); 101453541Sshin inp->in6p_route.ro_rt = 0; 101553541Sshin /* 101653541Sshin * A new route can be allocated the next time 101753541Sshin * output is attempted. 101853541Sshin */ 101953541Sshin } 102053541Sshin} 102153541Sshin 102253541Sshin/* 102353541Sshin * Lookup PCB in hash list. 102453541Sshin */ 102553541Sshinstruct inpcb * 102653541Sshinin6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 102753541Sshin struct inpcbinfo *pcbinfo; 102853541Sshin struct in6_addr *faddr, *laddr; 102953541Sshin u_int fport_arg, lport_arg; 103053541Sshin int wildcard; 103153541Sshin struct ifnet *ifp; 103253541Sshin{ 103353541Sshin struct inpcbhead *head; 103453541Sshin register struct inpcb *inp; 103553541Sshin u_short fport = fport_arg, lport = lport_arg; 103678064Sume int faith; 103753541Sshin 103883934Sbrooks if (faithprefix_p != NULL) 103983934Sbrooks faith = (*faithprefix_p)(laddr); 104083934Sbrooks else 104183934Sbrooks faith = 0; 104278064Sume 104353541Sshin /* 104453541Sshin * First look for an exact match. 104553541Sshin */ 104653541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, 104753541Sshin lport, fport, 104853541Sshin pcbinfo->hashmask)]; 104954263Sshin LIST_FOREACH(inp, head, inp_hash) { 105054952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 105153541Sshin continue; 105253541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 105353541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 105453541Sshin inp->inp_fport == fport && 105553541Sshin inp->inp_lport == lport) { 105653541Sshin /* 105753541Sshin * Found. 105853541Sshin */ 105953541Sshin return (inp); 106053541Sshin } 106153541Sshin } 106253541Sshin if (wildcard) { 106353541Sshin struct inpcb *local_wild = NULL; 106453541Sshin 106553541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 106653541Sshin pcbinfo->hashmask)]; 106754263Sshin LIST_FOREACH(inp, head, inp_hash) { 106854952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 106953541Sshin continue; 107053541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 107153541Sshin inp->inp_lport == lport) { 107278064Sume if (faith && (inp->inp_flags & INP_FAITH) == 0) 107353541Sshin continue; 107453541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 107553541Sshin laddr)) 107653541Sshin return (inp); 107753541Sshin else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 107853541Sshin local_wild = inp; 107953541Sshin } 108053541Sshin } 108153541Sshin return (local_wild); 108253541Sshin } 108353541Sshin 108453541Sshin /* 108553541Sshin * Not found. 108653541Sshin */ 108753541Sshin return (NULL); 108853541Sshin} 108953541Sshin 109053541Sshinvoid 109153541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 109253541Sshin{ 109353541Sshin struct ip6_hdr *ip; 109453541Sshin 109553541Sshin ip = mtod(m, struct ip6_hdr *); 109653541Sshin bzero(sin6, sizeof(*sin6)); 109753541Sshin sin6->sin6_len = sizeof(*sin6); 109853541Sshin sin6->sin6_family = AF_INET6; 109953541Sshin sin6->sin6_addr = ip->ip6_src; 110053541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 110153541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 110253541Sshin sin6->sin6_scope_id = 110353541Sshin (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 110453541Sshin ? m->m_pkthdr.rcvif->if_index : 0; 110553541Sshin 110653541Sshin return; 110753541Sshin} 1108