in6_pcb.c revision 92767
162587Sitojun/* $FreeBSD: head/sys/netinet6/in6_pcb.c 92767 2002-03-20 08:03:54Z jeff $ */ 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 && 18683366Sjulian suser_xxx(0, td->td_proc, 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 /* 34553541Sshin * Call inner routine, to assign local interface address. 34653541Sshin */ 34753541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 34853541Sshin return(error); 34953541Sshin 35053541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 35153541Sshin sin6->sin6_port, 35253541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 35353541Sshin ? addr6 : &inp->in6p_laddr, 35453541Sshin inp->inp_lport, 0, NULL) != NULL) { 35553541Sshin return (EADDRINUSE); 35653541Sshin } 35753541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 35853541Sshin if (inp->inp_lport == 0) { 35983366Sjulian error = in6_pcbbind(inp, (struct sockaddr *)0, td); 36053541Sshin if (error) 36153541Sshin return (error); 36253541Sshin } 36353541Sshin inp->in6p_laddr = *addr6; 36453541Sshin } 36553541Sshin inp->in6p_faddr = sin6->sin6_addr; 36653541Sshin inp->inp_fport = sin6->sin6_port; 36778064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 36878064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 36978064Sume if (inp->in6p_flags & IN6P_AUTOFLOWLABEL) 37055679Sshin inp->in6p_flowinfo |= 37178064Sume (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 37253541Sshin 37353541Sshin in_pcbrehash(inp); 37453541Sshin return (0); 37553541Sshin} 37653541Sshin 37762587Sitojun#if 0 37853541Sshin/* 37953541Sshin * Return an IPv6 address, which is the most appropriate for given 38053541Sshin * destination and user specified options. 38153541Sshin * If necessary, this function lookups the routing table and return 38253541Sshin * an entry to the caller for later use. 38353541Sshin */ 38453541Sshinstruct in6_addr * 38553541Sshinin6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp) 38653541Sshin struct sockaddr_in6 *dstsock; 38753541Sshin struct ip6_pktopts *opts; 38853541Sshin struct ip6_moptions *mopts; 38953541Sshin struct route_in6 *ro; 39053541Sshin struct in6_addr *laddr; 39153541Sshin int *errorp; 39253541Sshin{ 39353541Sshin struct in6_addr *dst; 39453541Sshin struct in6_ifaddr *ia6 = 0; 39553541Sshin struct in6_pktinfo *pi = NULL; 39653541Sshin 39753541Sshin dst = &dstsock->sin6_addr; 39853541Sshin *errorp = 0; 39953541Sshin 40053541Sshin /* 40153541Sshin * If the source address is explicitly specified by the caller, 40253541Sshin * use it. 40353541Sshin */ 40453541Sshin if (opts && (pi = opts->ip6po_pktinfo) && 40553541Sshin !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) 40653541Sshin return(&pi->ipi6_addr); 40753541Sshin 40853541Sshin /* 40953541Sshin * If the source address is not specified but the socket(if any) 41053541Sshin * is already bound, use the bound address. 41153541Sshin */ 41253541Sshin if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) 41353541Sshin return(laddr); 41453541Sshin 41553541Sshin /* 41653541Sshin * If the caller doesn't specify the source address but 41753541Sshin * the outgoing interface, use an address associated with 41853541Sshin * the interface. 41953541Sshin */ 42053541Sshin if (pi && pi->ipi6_ifindex) { 42153541Sshin /* XXX boundary check is assumed to be already done. */ 42283130Sjlemon ia6 = in6_ifawithscope(ifnet_byindex(pi->ipi6_ifindex), dst); 42353541Sshin if (ia6 == 0) { 42453541Sshin *errorp = EADDRNOTAVAIL; 42553541Sshin return(0); 42653541Sshin } 42753541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 42853541Sshin } 42953541Sshin 43053541Sshin /* 43153541Sshin * If the destination address is a link-local unicast address or 43253541Sshin * a multicast address, and if the outgoing interface is specified 43353541Sshin * by the sin6_scope_id filed, use an address associated with the 43453541Sshin * interface. 43553541Sshin * XXX: We're now trying to define more specific semantics of 43653541Sshin * sin6_scope_id field, so this part will be rewritten in 43753541Sshin * the near future. 43853541Sshin */ 43953541Sshin if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && 44053541Sshin dstsock->sin6_scope_id) { 44153541Sshin /* 44253541Sshin * I'm not sure if boundary check for scope_id is done 44353541Sshin * somewhere... 44453541Sshin */ 44553541Sshin if (dstsock->sin6_scope_id < 0 || 44653541Sshin if_index < dstsock->sin6_scope_id) { 44753541Sshin *errorp = ENXIO; /* XXX: better error? */ 44853541Sshin return(0); 44953541Sshin } 45083130Sjlemon ia6 = in6_ifawithscope(ifnet_byindex(dstsock->sin6_scope_id), 45153541Sshin dst); 45253541Sshin if (ia6 == 0) { 45353541Sshin *errorp = EADDRNOTAVAIL; 45453541Sshin return(0); 45553541Sshin } 45653541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 45753541Sshin } 45853541Sshin 45953541Sshin /* 46053541Sshin * If the destination address is a multicast address and 46153541Sshin * the outgoing interface for the address is specified 46253541Sshin * by the caller, use an address associated with the interface. 46353541Sshin * There is a sanity check here; if the destination has node-local 46453541Sshin * scope, the outgoing interfacde should be a loopback address. 46553541Sshin * Even if the outgoing interface is not specified, we also 46653541Sshin * choose a loopback interface as the outgoing interface. 46753541Sshin */ 46853541Sshin if (IN6_IS_ADDR_MULTICAST(dst)) { 46953541Sshin struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; 47053541Sshin 47153541Sshin if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { 47253541Sshin ifp = &loif[0]; 47353541Sshin } 47453541Sshin 47553541Sshin if (ifp) { 47653541Sshin ia6 = in6_ifawithscope(ifp, dst); 47753541Sshin if (ia6 == 0) { 47853541Sshin *errorp = EADDRNOTAVAIL; 47953541Sshin return(0); 48053541Sshin } 48153541Sshin return(&ia6->ia_addr.sin6_addr); 48253541Sshin } 48353541Sshin } 48453541Sshin 48553541Sshin /* 48653541Sshin * If the next hop address for the packet is specified 48753541Sshin * by caller, use an address associated with the route 48853541Sshin * to the next hop. 48953541Sshin */ 49053541Sshin { 49153541Sshin struct sockaddr_in6 *sin6_next; 49253541Sshin struct rtentry *rt; 49353541Sshin 49453541Sshin if (opts && opts->ip6po_nexthop) { 49553541Sshin sin6_next = satosin6(opts->ip6po_nexthop); 49653541Sshin rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); 49753541Sshin if (rt) { 49853541Sshin ia6 = in6_ifawithscope(rt->rt_ifp, dst); 49953541Sshin if (ia6 == 0) 50053541Sshin ia6 = ifatoia6(rt->rt_ifa); 50153541Sshin } 50253541Sshin if (ia6 == 0) { 50353541Sshin *errorp = EADDRNOTAVAIL; 50453541Sshin return(0); 50553541Sshin } 50653541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 50753541Sshin } 50853541Sshin } 50953541Sshin 51053541Sshin /* 51153541Sshin * If route is known or can be allocated now, 51253541Sshin * our src addr is taken from the i/f, else punt. 51353541Sshin */ 51453541Sshin if (ro) { 51553541Sshin if (ro->ro_rt && 51653541Sshin !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { 51753541Sshin RTFREE(ro->ro_rt); 51853541Sshin ro->ro_rt = (struct rtentry *)0; 51953541Sshin } 52053541Sshin if (ro->ro_rt == (struct rtentry *)0 || 52153541Sshin ro->ro_rt->rt_ifp == (struct ifnet *)0) { 52278064Sume struct sockaddr_in6 *dst6; 52378064Sume 52453541Sshin /* No route yet, so try to acquire one */ 52553541Sshin bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); 52678064Sume dst6 = (struct sockaddr_in6 *)&ro->ro_dst; 52778064Sume dst6->sin6_family = AF_INET6; 52878064Sume dst6->sin6_len = sizeof(struct sockaddr_in6); 52978064Sume dst6->sin6_addr = *dst; 53053541Sshin if (IN6_IS_ADDR_MULTICAST(dst)) { 53153541Sshin ro->ro_rt = rtalloc1(&((struct route *)ro) 53253541Sshin ->ro_dst, 0, 0UL); 53353541Sshin } else { 53454350Sshin rtalloc((struct route *)ro); 53553541Sshin } 53653541Sshin } 53753541Sshin 53853541Sshin /* 53953541Sshin * in_pcbconnect() checks out IFF_LOOPBACK to skip using 54053541Sshin * the address. But we don't know why it does so. 54153541Sshin * It is necessary to ensure the scope even for lo0 54253541Sshin * so doesn't check out IFF_LOOPBACK. 54353541Sshin */ 54453541Sshin 54553541Sshin if (ro->ro_rt) { 54653541Sshin ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); 54753541Sshin if (ia6 == 0) /* xxx scope error ?*/ 54853541Sshin ia6 = ifatoia6(ro->ro_rt->rt_ifa); 54953541Sshin } 55053541Sshin if (ia6 == 0) { 55153541Sshin *errorp = EHOSTUNREACH; /* no route */ 55253541Sshin return(0); 55353541Sshin } 55453541Sshin return(&satosin6(&ia6->ia_addr)->sin6_addr); 55553541Sshin } 55653541Sshin 55753541Sshin *errorp = EADDRNOTAVAIL; 55853541Sshin return(0); 55953541Sshin} 56053541Sshin 56153541Sshin/* 56253541Sshin * Default hop limit selection. The precedence is as follows: 56353541Sshin * 1. Hoplimit valued specified via ioctl. 56453541Sshin * 2. (If the outgoing interface is detected) the current 56553541Sshin * hop limit of the interface specified by router advertisement. 56653541Sshin * 3. The system default hoplimit. 56753541Sshin*/ 56853541Sshinint 56953541Sshinin6_selecthlim(in6p, ifp) 57053541Sshin struct in6pcb *in6p; 57153541Sshin struct ifnet *ifp; 57253541Sshin{ 57353541Sshin if (in6p && in6p->in6p_hops >= 0) 57453541Sshin return(in6p->in6p_hops); 57553541Sshin else if (ifp) 57653541Sshin return(nd_ifinfo[ifp->if_index].chlim); 57753541Sshin else 57853541Sshin return(ip6_defhlim); 57953541Sshin} 58062587Sitojun#endif 58153541Sshin 58253541Sshinvoid 58353541Sshinin6_pcbdisconnect(inp) 58453541Sshin struct inpcb *inp; 58553541Sshin{ 58653541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 58753541Sshin inp->inp_fport = 0; 58878064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 58978064Sume inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 59053541Sshin in_pcbrehash(inp); 59153541Sshin if (inp->inp_socket->so_state & SS_NOFDREF) 59253541Sshin in6_pcbdetach(inp); 59353541Sshin} 59453541Sshin 59553541Sshinvoid 59653541Sshinin6_pcbdetach(inp) 59753541Sshin struct inpcb *inp; 59853541Sshin{ 59953541Sshin struct socket *so = inp->inp_socket; 60053541Sshin struct inpcbinfo *ipi = inp->inp_pcbinfo; 60153541Sshin 60253541Sshin#ifdef IPSEC 60358452Sgreen if (inp->in6p_sp != NULL) 60458452Sgreen ipsec6_delete_pcbpolicy(inp); 60553541Sshin#endif /* IPSEC */ 60653541Sshin inp->inp_gencnt = ++ipi->ipi_gencnt; 60753541Sshin in_pcbremlists(inp); 60853541Sshin sotoinpcb(so) = 0; 60986487Sdillon sotryfree(so); 61078064Sume 61153541Sshin if (inp->in6p_options) 61253541Sshin m_freem(inp->in6p_options); 61378064Sume ip6_freepcbopts(inp->in6p_outputopts); 61478064Sume ip6_freemoptions(inp->in6p_moptions); 61553541Sshin if (inp->in6p_route.ro_rt) 61653541Sshin rtfree(inp->in6p_route.ro_rt); 61755679Sshin /* Check and free IPv4 related resources in case of mapped addr */ 61855679Sshin if (inp->inp_options) 61955679Sshin (void)m_free(inp->inp_options); 62055679Sshin ip_freemoptions(inp->inp_moptions); 62155679Sshin 62253541Sshin inp->inp_vflag = 0; 62392767Sjeff uma_zfree(ipi->ipi_zone, inp); 62453541Sshin} 62553541Sshin 62653541Sshin/* 62753541Sshin * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was 62853541Sshin * modified to match the pru_sockaddr() and pru_peeraddr() entry points 62953541Sshin * in struct pr_usrreqs, so that protocols can just reference then directly 63053541Sshin * without the need for a wrapper function. The socket must have a valid 63153541Sshin * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 63253541Sshin * except through a kernel programming error, so it is acceptable to panic 63353541Sshin * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 63453541Sshin * because there actually /is/ a programming error somewhere... XXX) 63553541Sshin */ 63653541Sshinint 63753541Sshinin6_setsockaddr(so, nam) 63853541Sshin struct socket *so; 63953541Sshin struct sockaddr **nam; 64053541Sshin{ 64153541Sshin int s; 64253541Sshin register struct inpcb *inp; 64353541Sshin register struct sockaddr_in6 *sin6; 64453541Sshin 64553541Sshin /* 64653541Sshin * Do the malloc first in case it blocks. 64753541Sshin */ 64853541Sshin MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); 64953541Sshin bzero(sin6, sizeof *sin6); 65053541Sshin sin6->sin6_family = AF_INET6; 65153541Sshin sin6->sin6_len = sizeof(*sin6); 65253541Sshin 65353541Sshin s = splnet(); 65453541Sshin inp = sotoinpcb(so); 65553541Sshin if (!inp) { 65653541Sshin splx(s); 65753541Sshin free(sin6, M_SONAME); 65853541Sshin return EINVAL; 65953541Sshin } 66053541Sshin sin6->sin6_port = inp->inp_lport; 66153541Sshin sin6->sin6_addr = inp->in6p_laddr; 66253541Sshin splx(s); 66353541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 66453541Sshin sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 66553541Sshin else 66653541Sshin sin6->sin6_scope_id = 0; /*XXX*/ 66753541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 66853541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 66953541Sshin 67053541Sshin *nam = (struct sockaddr *)sin6; 67153541Sshin return 0; 67253541Sshin} 67353541Sshin 67453541Sshinint 67553541Sshinin6_setpeeraddr(so, nam) 67653541Sshin struct socket *so; 67753541Sshin struct sockaddr **nam; 67853541Sshin{ 67953541Sshin int s; 68053541Sshin struct inpcb *inp; 68153541Sshin register struct sockaddr_in6 *sin6; 68253541Sshin 68353541Sshin /* 68453541Sshin * Do the malloc first in case it blocks. 68553541Sshin */ 68653541Sshin MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK); 68753541Sshin bzero((caddr_t)sin6, sizeof (*sin6)); 68853541Sshin sin6->sin6_family = AF_INET6; 68953541Sshin sin6->sin6_len = sizeof(struct sockaddr_in6); 69053541Sshin 69153541Sshin s = splnet(); 69253541Sshin inp = sotoinpcb(so); 69353541Sshin if (!inp) { 69453541Sshin splx(s); 69553541Sshin free(sin6, M_SONAME); 69653541Sshin return EINVAL; 69753541Sshin } 69853541Sshin sin6->sin6_port = inp->inp_fport; 69953541Sshin sin6->sin6_addr = inp->in6p_faddr; 70053541Sshin splx(s); 70153541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 70253541Sshin sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 70353541Sshin else 70453541Sshin sin6->sin6_scope_id = 0; /*XXX*/ 70553541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 70653541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 70753541Sshin 70853541Sshin *nam = (struct sockaddr *)sin6; 70953541Sshin return 0; 71053541Sshin} 71153541Sshin 71253541Sshinint 71353541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 71453541Sshin{ 71553541Sshin struct inpcb *inp = sotoinpcb(so); 71653541Sshin int error; 71753541Sshin 71853541Sshin if (inp == NULL) 71953541Sshin return EINVAL; 72053541Sshin if (inp->inp_vflag & INP_IPV4) { 72153541Sshin error = in_setsockaddr(so, nam); 72254952Seivind if (error == 0) 72353541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 72453541Sshin } else 72553541Sshin error = in6_setsockaddr(so, nam); 72653541Sshin 72753541Sshin return error; 72853541Sshin} 72953541Sshin 73053541Sshinint 73153541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 73253541Sshin{ 73353541Sshin struct inpcb *inp = sotoinpcb(so); 73453541Sshin int error; 73553541Sshin 73653541Sshin if (inp == NULL) 73753541Sshin return EINVAL; 73853541Sshin if (inp->inp_vflag & INP_IPV4) { 73953541Sshin error = in_setpeeraddr(so, nam); 74054952Seivind if (error == 0) 74153541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 74253541Sshin } else 74353541Sshin error = in6_setpeeraddr(so, nam); 74453541Sshin 74553541Sshin return error; 74653541Sshin} 74753541Sshin 74853541Sshin/* 74953541Sshin * Pass some notification to all connections of a protocol 75053541Sshin * associated with address dst. The local address and/or port numbers 75153541Sshin * may be specified to limit the search. The "usual action" will be 75253541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 75353541Sshin * cmds that are uninteresting (e.g., no error in the map). 75453541Sshin * Call the protocol specific routine (if any) to report 75553541Sshin * any errors for each matching socket. 75653541Sshin * 75753541Sshin * Must be called at splnet. 75853541Sshin */ 75953541Sshinvoid 76078064Sumein6_pcbnotify(head, dst, fport_arg, src, lport_arg, cmd, notify) 76153541Sshin struct inpcbhead *head; 76291346Salfred struct sockaddr *dst; 76391346Salfred const struct sockaddr *src; 76453541Sshin u_int fport_arg, lport_arg; 76553541Sshin int cmd; 76653541Sshin void (*notify) __P((struct inpcb *, int)); 76753541Sshin{ 76862587Sitojun struct inpcb *inp, *ninp; 76978064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 77053541Sshin u_short fport = fport_arg, lport = lport_arg; 77178064Sume u_int32_t flowinfo; 77253541Sshin int errno, s; 77353541Sshin 77453541Sshin if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 77553541Sshin return; 77678064Sume 77778064Sume sa6_dst = (struct sockaddr_in6 *)dst; 77878064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 77953541Sshin return; 78053541Sshin 78153541Sshin /* 78278064Sume * note that src can be NULL when we get notify by local fragmentation. 78378064Sume */ 78491346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 78578064Sume flowinfo = sa6_src.sin6_flowinfo; 78678064Sume 78778064Sume /* 78853541Sshin * Redirects go to all references to the destination, 78962587Sitojun * and use in6_rtchange to invalidate the route cache. 79062587Sitojun * Dead host indications: also use in6_rtchange to invalidate 79162587Sitojun * the cache, and deliver the error to all the sockets. 79253541Sshin * Otherwise, if we have knowledge of the local port and address, 79353541Sshin * deliver only to that socket. 79453541Sshin */ 79553541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 79653541Sshin fport = 0; 79753541Sshin lport = 0; 79878064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 79962587Sitojun 80078064Sume if (cmd != PRC_HOSTDEAD) 80178064Sume notify = in6_rtchange; 80253541Sshin } 80353541Sshin errno = inet6ctlerrmap[cmd]; 80453541Sshin s = splnet(); 80562587Sitojun for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) { 80662587Sitojun ninp = LIST_NEXT(inp, inp_list); 80762587Sitojun 80878064Sume if ((inp->inp_vflag & INP_IPV6) == 0) 80953541Sshin continue; 81062587Sitojun 81178064Sume /* 81278064Sume * Detect if we should notify the error. If no source and 81378064Sume * destination ports are specifed, but non-zero flowinfo and 81478064Sume * local address match, notify the error. This is the case 81578064Sume * when the error is delivered with an encrypted buffer 81678064Sume * by ESP. Otherwise, just compare addresses and ports 81778064Sume * as usual. 81878064Sume */ 81978064Sume if (lport == 0 && fport == 0 && flowinfo && 82078064Sume inp->inp_socket != NULL && 82178064Sume flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 82278064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 82378064Sume goto do_notify; 82478064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 82578064Sume &sa6_dst->sin6_addr) || 82678064Sume inp->inp_socket == 0 || 82778064Sume (lport && inp->inp_lport != lport) || 82878064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 82978064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 83078064Sume &sa6_src.sin6_addr)) || 83178064Sume (fport && inp->inp_fport != fport)) 83253541Sshin continue; 83362587Sitojun 83478064Sume do_notify: 83553541Sshin if (notify) 83678064Sume (*notify)(inp, errno); 83753541Sshin } 83853541Sshin splx(s); 83953541Sshin} 84053541Sshin 84153541Sshin/* 84253541Sshin * Lookup a PCB based on the local address and port. 84353541Sshin */ 84453541Sshinstruct inpcb * 84553541Sshinin6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) 84653541Sshin struct inpcbinfo *pcbinfo; 84753541Sshin struct in6_addr *laddr; 84853541Sshin u_int lport_arg; 84953541Sshin int wild_okay; 85053541Sshin{ 85153541Sshin register struct inpcb *inp; 85253541Sshin int matchwild = 3, wildcard; 85353541Sshin u_short lport = lport_arg; 85453541Sshin 85553541Sshin if (!wild_okay) { 85653541Sshin struct inpcbhead *head; 85753541Sshin /* 85853541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 85953541Sshin * matches the local address and port we're looking for. 86053541Sshin */ 86153541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 86253541Sshin pcbinfo->hashmask)]; 86353541Sshin LIST_FOREACH(inp, head, inp_hash) { 86454952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 86553541Sshin continue; 86653541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 86753541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 86853541Sshin inp->inp_lport == lport) { 86953541Sshin /* 87053541Sshin * Found. 87153541Sshin */ 87253541Sshin return (inp); 87353541Sshin } 87453541Sshin } 87553541Sshin /* 87653541Sshin * Not found. 87753541Sshin */ 87853541Sshin return (NULL); 87953541Sshin } else { 88053541Sshin struct inpcbporthead *porthash; 88153541Sshin struct inpcbport *phd; 88253541Sshin struct inpcb *match = NULL; 88353541Sshin /* 88453541Sshin * Best fit PCB lookup. 88553541Sshin * 88653541Sshin * First see if this local port is in use by looking on the 88753541Sshin * port hash list. 88853541Sshin */ 88953541Sshin porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 89053541Sshin pcbinfo->porthashmask)]; 89153541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 89253541Sshin if (phd->phd_port == lport) 89353541Sshin break; 89453541Sshin } 89553541Sshin if (phd != NULL) { 89653541Sshin /* 89753541Sshin * Port is in use by one or more PCBs. Look for best 89853541Sshin * fit. 89953541Sshin */ 90053541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 90153541Sshin wildcard = 0; 90254952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 90353541Sshin continue; 90453541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 90553541Sshin wildcard++; 90653541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 90753541Sshin &inp->in6p_laddr)) { 90853541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 90953541Sshin wildcard++; 91053541Sshin else if (!IN6_ARE_ADDR_EQUAL( 91153541Sshin &inp->in6p_laddr, laddr)) 91253541Sshin continue; 91353541Sshin } else { 91453541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 91553541Sshin wildcard++; 91653541Sshin } 91753541Sshin if (wildcard < matchwild) { 91853541Sshin match = inp; 91953541Sshin matchwild = wildcard; 92053541Sshin if (matchwild == 0) { 92153541Sshin break; 92253541Sshin } 92353541Sshin } 92453541Sshin } 92553541Sshin } 92653541Sshin return (match); 92753541Sshin } 92853541Sshin} 92953541Sshin 93081127Sumevoid 93181127Sumein6_pcbpurgeif0(head, ifp) 93281127Sume struct in6pcb *head; 93381127Sume struct ifnet *ifp; 93481127Sume{ 93581127Sume struct in6pcb *in6p; 93681127Sume struct ip6_moptions *im6o; 93781127Sume struct in6_multi_mship *imm, *nimm; 93881127Sume 93981127Sume for (in6p = head; in6p != NULL; in6p = LIST_NEXT(in6p, inp_list)) { 94081127Sume im6o = in6p->in6p_moptions; 94181127Sume if ((in6p->inp_vflag & INP_IPV6) && 94281127Sume im6o) { 94381127Sume /* 94481127Sume * Unselect the outgoing interface if it is being 94581127Sume * detached. 94681127Sume */ 94781127Sume if (im6o->im6o_multicast_ifp == ifp) 94881127Sume im6o->im6o_multicast_ifp = NULL; 94981127Sume 95081127Sume /* 95181127Sume * Drop multicast group membership if we joined 95281127Sume * through the interface being detached. 95381127Sume * XXX controversial - is it really legal for kernel 95481127Sume * to force this? 95581127Sume */ 95681127Sume for (imm = im6o->im6o_memberships.lh_first; 95781127Sume imm != NULL; imm = nimm) { 95881127Sume nimm = imm->i6mm_chain.le_next; 95981127Sume if (imm->i6mm_maddr->in6m_ifp == ifp) { 96081127Sume LIST_REMOVE(imm, i6mm_chain); 96181127Sume in6_delmulti(imm->i6mm_maddr); 96281127Sume free(imm, M_IPMADDR); 96381127Sume } 96481127Sume } 96581127Sume } 96681127Sume } 96781127Sume} 96881127Sume 96953541Sshin/* 97053541Sshin * Check for alternatives when higher level complains 97153541Sshin * about service problems. For now, invalidate cached 97253541Sshin * routing information. If the route was created dynamically 97353541Sshin * (by a redirect), time to try a default gateway again. 97453541Sshin */ 97553541Sshinvoid 97653541Sshinin6_losing(in6p) 97753541Sshin struct inpcb *in6p; 97853541Sshin{ 97953541Sshin struct rtentry *rt; 98053541Sshin struct rt_addrinfo info; 98153541Sshin 98253541Sshin if ((rt = in6p->in6p_route.ro_rt) != NULL) { 98353541Sshin bzero((caddr_t)&info, sizeof(info)); 98485074Sru info.rti_flags = rt->rt_flags; 98585074Sru info.rti_info[RTAX_DST] = rt_key(rt); 98653541Sshin info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 98753541Sshin info.rti_info[RTAX_NETMASK] = rt_mask(rt); 98853541Sshin rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 98953541Sshin if (rt->rt_flags & RTF_DYNAMIC) 99085074Sru (void)rtrequest1(RTM_DELETE, &info, NULL); 99185072Sru in6p->in6p_route.ro_rt = NULL; 99285072Sru rtfree(rt); 99353541Sshin /* 99453541Sshin * A new route can be allocated 99553541Sshin * the next time output is attempted. 99653541Sshin */ 99753541Sshin } 99853541Sshin} 99953541Sshin 100053541Sshin/* 100153541Sshin * After a routing change, flush old routing 100253541Sshin * and allocate a (hopefully) better one. 100353541Sshin */ 100453541Sshinvoid 100553541Sshinin6_rtchange(inp, errno) 100653541Sshin struct inpcb *inp; 100753541Sshin int errno; 100853541Sshin{ 100953541Sshin if (inp->in6p_route.ro_rt) { 101053541Sshin rtfree(inp->in6p_route.ro_rt); 101153541Sshin inp->in6p_route.ro_rt = 0; 101253541Sshin /* 101353541Sshin * A new route can be allocated the next time 101453541Sshin * output is attempted. 101553541Sshin */ 101653541Sshin } 101753541Sshin} 101853541Sshin 101953541Sshin/* 102053541Sshin * Lookup PCB in hash list. 102153541Sshin */ 102253541Sshinstruct inpcb * 102353541Sshinin6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) 102453541Sshin struct inpcbinfo *pcbinfo; 102553541Sshin struct in6_addr *faddr, *laddr; 102653541Sshin u_int fport_arg, lport_arg; 102753541Sshin int wildcard; 102853541Sshin struct ifnet *ifp; 102953541Sshin{ 103053541Sshin struct inpcbhead *head; 103153541Sshin register struct inpcb *inp; 103253541Sshin u_short fport = fport_arg, lport = lport_arg; 103378064Sume int faith; 103453541Sshin 103583934Sbrooks if (faithprefix_p != NULL) 103683934Sbrooks faith = (*faithprefix_p)(laddr); 103783934Sbrooks else 103883934Sbrooks faith = 0; 103978064Sume 104053541Sshin /* 104153541Sshin * First look for an exact match. 104253541Sshin */ 104353541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, 104453541Sshin lport, fport, 104553541Sshin pcbinfo->hashmask)]; 104654263Sshin LIST_FOREACH(inp, head, inp_hash) { 104754952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 104853541Sshin continue; 104953541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 105053541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 105153541Sshin inp->inp_fport == fport && 105253541Sshin inp->inp_lport == lport) { 105353541Sshin /* 105453541Sshin * Found. 105553541Sshin */ 105653541Sshin return (inp); 105753541Sshin } 105853541Sshin } 105953541Sshin if (wildcard) { 106053541Sshin struct inpcb *local_wild = NULL; 106153541Sshin 106253541Sshin head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, 106353541Sshin pcbinfo->hashmask)]; 106454263Sshin LIST_FOREACH(inp, head, inp_hash) { 106554952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 106653541Sshin continue; 106753541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 106853541Sshin inp->inp_lport == lport) { 106978064Sume if (faith && (inp->inp_flags & INP_FAITH) == 0) 107053541Sshin continue; 107153541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 107253541Sshin laddr)) 107353541Sshin return (inp); 107453541Sshin else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 107553541Sshin local_wild = inp; 107653541Sshin } 107753541Sshin } 107853541Sshin return (local_wild); 107953541Sshin } 108053541Sshin 108153541Sshin /* 108253541Sshin * Not found. 108353541Sshin */ 108453541Sshin return (NULL); 108553541Sshin} 108653541Sshin 108753541Sshinvoid 108853541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 108953541Sshin{ 109053541Sshin struct ip6_hdr *ip; 109153541Sshin 109253541Sshin ip = mtod(m, struct ip6_hdr *); 109353541Sshin bzero(sin6, sizeof(*sin6)); 109453541Sshin sin6->sin6_len = sizeof(*sin6); 109553541Sshin sin6->sin6_family = AF_INET6; 109653541Sshin sin6->sin6_addr = ip->ip6_src; 109753541Sshin if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 109853541Sshin sin6->sin6_addr.s6_addr16[1] = 0; 109953541Sshin sin6->sin6_scope_id = 110053541Sshin (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 110153541Sshin ? m->m_pkthdr.rcvif->if_index : 0; 110253541Sshin 110353541Sshin return; 110453541Sshin} 1105