911 lines
25 KiB
C
911 lines
25 KiB
C
/*-
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $
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*/
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/*-
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* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipsec.h"
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/jail.h>
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#include <vm/uma.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/in_systm.h>
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#include <netinet/tcp_var.h>
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#include <netinet/ip6.h>
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#include <netinet/ip_var.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet/in_pcb.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/scope6_var.h>
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec6.h>
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#include <netipsec/key.h>
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#endif /* IPSEC */
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#include <security/mac/mac_framework.h>
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struct in6_addr zeroin6_addr;
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int
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in6_pcbbind(register struct inpcb *inp, struct sockaddr *nam,
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struct ucred *cred)
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{
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struct socket *so = inp->inp_socket;
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struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
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struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
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u_short lport = 0;
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int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
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INP_INFO_WLOCK_ASSERT(pcbinfo);
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INP_WLOCK_ASSERT(inp);
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if (!in6_ifaddr) /* XXX broken! */
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return (EADDRNOTAVAIL);
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if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
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return (EINVAL);
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if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
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wild = INPLOOKUP_WILDCARD;
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if (nam) {
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int error;
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sin6 = (struct sockaddr_in6 *)nam;
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if (nam->sa_len != sizeof(*sin6))
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return (EINVAL);
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/*
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* family check.
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*/
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if (nam->sa_family != AF_INET6)
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return (EAFNOSUPPORT);
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if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
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return(error);
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lport = sin6->sin6_port;
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if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
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/*
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* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
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* allow compepte duplication of binding if
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* SO_REUSEPORT is set, or if SO_REUSEADDR is set
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* and a multicast address is bound on both
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* new and duplicated sockets.
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*/
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if (so->so_options & SO_REUSEADDR)
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reuseport = SO_REUSEADDR|SO_REUSEPORT;
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} else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
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struct ifaddr *ia = NULL;
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sin6->sin6_port = 0; /* yech... */
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if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
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return (EADDRNOTAVAIL);
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/*
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* XXX: bind to an anycast address might accidentally
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* cause sending a packet with anycast source address.
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* We should allow to bind to a deprecated address, since
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* the application dares to use it.
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*/
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if (ia &&
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((struct in6_ifaddr *)ia)->ia6_flags &
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(IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) {
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return (EADDRNOTAVAIL);
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}
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}
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if (lport) {
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struct inpcb *t;
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/* GROSS */
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if (ntohs(lport) <= ipport_reservedhigh &&
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ntohs(lport) >= ipport_reservedlow &&
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priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
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0))
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return (EACCES);
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if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
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priv_check_cred(so->so_cred,
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PRIV_NETINET_REUSEPORT, 0) != 0) {
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t = in6_pcblookup_local(pcbinfo,
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&sin6->sin6_addr, lport,
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INPLOOKUP_WILDCARD);
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if (t &&
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((t->inp_vflag & INP_TIMEWAIT) == 0) &&
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(so->so_type != SOCK_STREAM ||
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IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) &&
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(!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
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!IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
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(t->inp_socket->so_options & SO_REUSEPORT)
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== 0) && (so->so_cred->cr_uid !=
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t->inp_socket->so_cred->cr_uid))
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return (EADDRINUSE);
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if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
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IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
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struct sockaddr_in sin;
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in6_sin6_2_sin(&sin, sin6);
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t = in_pcblookup_local(pcbinfo,
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sin.sin_addr, lport,
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INPLOOKUP_WILDCARD);
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if (t &&
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((t->inp_vflag &
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INP_TIMEWAIT) == 0) &&
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(so->so_type != SOCK_STREAM ||
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ntohl(t->inp_faddr.s_addr) ==
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INADDR_ANY) &&
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(so->so_cred->cr_uid !=
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t->inp_socket->so_cred->cr_uid))
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return (EADDRINUSE);
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}
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}
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t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
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lport, wild);
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if (t && (reuseport & ((t->inp_vflag & INP_TIMEWAIT) ?
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intotw(t)->tw_so_options :
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t->inp_socket->so_options)) == 0)
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return (EADDRINUSE);
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if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 &&
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IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
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struct sockaddr_in sin;
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in6_sin6_2_sin(&sin, sin6);
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t = in_pcblookup_local(pcbinfo, sin.sin_addr,
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lport, wild);
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if (t && t->inp_vflag & INP_TIMEWAIT) {
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if ((reuseport &
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intotw(t)->tw_so_options) == 0 &&
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(ntohl(t->inp_laddr.s_addr) !=
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INADDR_ANY || ((inp->inp_vflag &
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INP_IPV6PROTO) ==
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(t->inp_vflag & INP_IPV6PROTO))))
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return (EADDRINUSE);
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}
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else if (t &&
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(reuseport & t->inp_socket->so_options)
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== 0 && (ntohl(t->inp_laddr.s_addr) !=
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INADDR_ANY || INP_SOCKAF(so) ==
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INP_SOCKAF(t->inp_socket)))
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return (EADDRINUSE);
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}
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}
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inp->in6p_laddr = sin6->sin6_addr;
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}
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if (lport == 0) {
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int e;
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if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0)
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return (e);
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}
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else {
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inp->inp_lport = lport;
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if (in_pcbinshash(inp) != 0) {
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inp->in6p_laddr = in6addr_any;
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inp->inp_lport = 0;
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return (EAGAIN);
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}
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}
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return (0);
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}
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/*
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* Transform old in6_pcbconnect() into an inner subroutine for new
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* in6_pcbconnect(): Do some validity-checking on the remote
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* address (in mbuf 'nam') and then determine local host address
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* (i.e., which interface) to use to access that remote host.
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*
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* This preserves definition of in6_pcbconnect(), while supporting a
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* slightly different version for T/TCP. (This is more than
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* a bit of a kludge, but cleaning up the internal interfaces would
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* have forced minor changes in every protocol).
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*/
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int
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in6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam,
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struct in6_addr **plocal_addr6)
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{
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register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
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int error = 0;
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struct ifnet *ifp = NULL;
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int scope_ambiguous = 0;
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INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
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INP_WLOCK_ASSERT(inp);
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if (nam->sa_len != sizeof (*sin6))
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return (EINVAL);
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if (sin6->sin6_family != AF_INET6)
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return (EAFNOSUPPORT);
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if (sin6->sin6_port == 0)
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return (EADDRNOTAVAIL);
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if (sin6->sin6_scope_id == 0 && !ip6_use_defzone)
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scope_ambiguous = 1;
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if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0)
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return(error);
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if (in6_ifaddr) {
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/*
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* If the destination address is UNSPECIFIED addr,
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* use the loopback addr, e.g ::1.
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*/
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if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
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sin6->sin6_addr = in6addr_loopback;
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}
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/*
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* XXX: in6_selectsrc might replace the bound local address
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* with the address specified by setsockopt(IPV6_PKTINFO).
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* Is it the intended behavior?
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*/
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*plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts,
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inp->in6p_moptions, NULL,
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&inp->in6p_laddr, &ifp, &error);
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if (ifp && scope_ambiguous &&
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(error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) {
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return(error);
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}
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if (*plocal_addr6 == 0) {
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if (error == 0)
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error = EADDRNOTAVAIL;
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return (error);
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}
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/*
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* Don't do pcblookup call here; return interface in
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* plocal_addr6
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* and exit to caller, that will do the lookup.
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*/
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return (0);
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}
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/*
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* Outer subroutine:
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* Connect from a socket to a specified address.
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* Both address and port must be specified in argument sin.
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* If don't have a local address for this socket yet,
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* then pick one.
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*/
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int
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in6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam,
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struct ucred *cred)
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{
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struct in6_addr *addr6;
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register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
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int error;
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INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
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INP_WLOCK_ASSERT(inp);
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/*
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* Call inner routine, to assign local interface address.
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* in6_pcbladdr() may automatically fill in sin6_scope_id.
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*/
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if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0)
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return (error);
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if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
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sin6->sin6_port,
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IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
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? addr6 : &inp->in6p_laddr,
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inp->inp_lport, 0, NULL) != NULL) {
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return (EADDRINUSE);
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}
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if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
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if (inp->inp_lport == 0) {
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error = in6_pcbbind(inp, (struct sockaddr *)0, cred);
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if (error)
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return (error);
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}
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inp->in6p_laddr = *addr6;
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}
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inp->in6p_faddr = sin6->sin6_addr;
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inp->inp_fport = sin6->sin6_port;
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/* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
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inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
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if (inp->in6p_flags & IN6P_AUTOFLOWLABEL)
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inp->in6p_flowinfo |=
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(htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
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in_pcbrehash(inp);
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return (0);
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}
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void
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in6_pcbdisconnect(struct inpcb *inp)
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{
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INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
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INP_WLOCK_ASSERT(inp);
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bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
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inp->inp_fport = 0;
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/* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */
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inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
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in_pcbrehash(inp);
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}
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void
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in6_pcbdetach(struct inpcb *inp)
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{
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KASSERT(inp->inp_socket != NULL, ("in6_pcbdetach: inp_socket == NULL"));
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inp->inp_socket->so_pcb = NULL;
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inp->inp_socket = NULL;
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}
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void
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in6_pcbfree(struct inpcb *inp)
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{
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struct inpcbinfo *ipi = inp->inp_pcbinfo;
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KASSERT(inp->inp_socket == NULL, ("in6_pcbfree: inp_socket != NULL"));
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INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
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INP_WLOCK_ASSERT(inp);
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#ifdef IPSEC
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if (inp->in6p_sp != NULL)
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ipsec6_delete_pcbpolicy(inp);
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#endif /* IPSEC */
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inp->inp_gencnt = ++ipi->ipi_gencnt;
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in_pcbremlists(inp);
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ip6_freepcbopts(inp->in6p_outputopts);
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ip6_freemoptions(inp->in6p_moptions);
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/* Check and free IPv4 related resources in case of mapped addr */
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if (inp->inp_options)
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(void)m_free(inp->inp_options);
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if (inp->inp_moptions != NULL)
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inp_freemoptions(inp->inp_moptions);
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inp->inp_vflag = 0;
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#ifdef MAC
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mac_inpcb_destroy(inp);
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#endif
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INP_WUNLOCK(inp);
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uma_zfree(ipi->ipi_zone, inp);
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}
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struct sockaddr *
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in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
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{
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struct sockaddr_in6 *sin6;
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MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
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bzero(sin6, sizeof *sin6);
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sin6->sin6_family = AF_INET6;
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sin6->sin6_len = sizeof(*sin6);
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sin6->sin6_port = port;
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sin6->sin6_addr = *addr_p;
|
|
(void)sa6_recoverscope(sin6); /* XXX: should catch errors */
|
|
|
|
return (struct sockaddr *)sin6;
|
|
}
|
|
|
|
struct sockaddr *
|
|
in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p)
|
|
{
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_in6 *sin6_p;
|
|
|
|
bzero(&sin, sizeof sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_port = port;
|
|
sin.sin_addr = *addr_p;
|
|
|
|
MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
|
|
M_WAITOK);
|
|
in6_sin_2_v4mapsin6(&sin, sin6_p);
|
|
|
|
return (struct sockaddr *)sin6_p;
|
|
}
|
|
|
|
int
|
|
in6_getsockaddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
register struct inpcb *inp;
|
|
struct in6_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL"));
|
|
|
|
INP_RLOCK(inp);
|
|
port = inp->inp_lport;
|
|
addr = inp->in6p_laddr;
|
|
INP_RUNLOCK(inp);
|
|
|
|
*nam = in6_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp;
|
|
struct in6_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL"));
|
|
|
|
INP_RLOCK(inp);
|
|
port = inp->inp_fport;
|
|
addr = inp->in6p_faddr;
|
|
INP_RUNLOCK(inp);
|
|
|
|
*nam = in6_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp;
|
|
int error;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL"));
|
|
|
|
if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
|
|
error = in_getsockaddr(so, nam);
|
|
if (error == 0)
|
|
in6_sin_2_v4mapsin6_in_sock(nam);
|
|
} else {
|
|
/* scope issues will be handled in in6_getsockaddr(). */
|
|
error = in6_getsockaddr(so, nam);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp;
|
|
int error;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL"));
|
|
|
|
if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) {
|
|
error = in_getpeeraddr(so, nam);
|
|
if (error == 0)
|
|
in6_sin_2_v4mapsin6_in_sock(nam);
|
|
} else
|
|
/* scope issues will be handled in in6_getpeeraddr(). */
|
|
error = in6_getpeeraddr(so, nam);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Pass some notification to all connections of a protocol
|
|
* associated with address dst. The local address and/or port numbers
|
|
* may be specified to limit the search. The "usual action" will be
|
|
* taken, depending on the ctlinput cmd. The caller must filter any
|
|
* cmds that are uninteresting (e.g., no error in the map).
|
|
* Call the protocol specific routine (if any) to report
|
|
* any errors for each matching socket.
|
|
*/
|
|
void
|
|
in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst,
|
|
u_int fport_arg, const struct sockaddr *src, u_int lport_arg,
|
|
int cmd, void *cmdarg,
|
|
struct inpcb *(*notify)(struct inpcb *, int))
|
|
{
|
|
struct inpcb *inp, *inp_temp;
|
|
struct sockaddr_in6 sa6_src, *sa6_dst;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
u_int32_t flowinfo;
|
|
int errno;
|
|
|
|
if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
|
|
return;
|
|
|
|
sa6_dst = (struct sockaddr_in6 *)dst;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
|
|
return;
|
|
|
|
/*
|
|
* note that src can be NULL when we get notify by local fragmentation.
|
|
*/
|
|
sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src;
|
|
flowinfo = sa6_src.sin6_flowinfo;
|
|
|
|
/*
|
|
* Redirects go to all references to the destination,
|
|
* and use in6_rtchange to invalidate the route cache.
|
|
* Dead host indications: also use in6_rtchange to invalidate
|
|
* the cache, and deliver the error to all the sockets.
|
|
* Otherwise, if we have knowledge of the local port and address,
|
|
* deliver only to that socket.
|
|
*/
|
|
if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
|
|
fport = 0;
|
|
lport = 0;
|
|
bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
|
|
|
|
if (cmd != PRC_HOSTDEAD)
|
|
notify = in6_rtchange;
|
|
}
|
|
errno = inet6ctlerrmap[cmd];
|
|
INP_INFO_WLOCK(pcbinfo);
|
|
LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
|
|
INP_WLOCK(inp);
|
|
if ((inp->inp_vflag & INP_IPV6) == 0) {
|
|
INP_WUNLOCK(inp);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If the error designates a new path MTU for a destination
|
|
* and the application (associated with this socket) wanted to
|
|
* know the value, notify. Note that we notify for all
|
|
* disconnected sockets if the corresponding application
|
|
* wanted. This is because some UDP applications keep sending
|
|
* sockets disconnected.
|
|
* XXX: should we avoid to notify the value to TCP sockets?
|
|
*/
|
|
if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 &&
|
|
(IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) ||
|
|
IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) {
|
|
ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst,
|
|
(u_int32_t *)cmdarg);
|
|
}
|
|
|
|
/*
|
|
* Detect if we should notify the error. If no source and
|
|
* destination ports are specifed, but non-zero flowinfo and
|
|
* local address match, notify the error. This is the case
|
|
* when the error is delivered with an encrypted buffer
|
|
* by ESP. Otherwise, just compare addresses and ports
|
|
* as usual.
|
|
*/
|
|
if (lport == 0 && fport == 0 && flowinfo &&
|
|
inp->inp_socket != NULL &&
|
|
flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
|
|
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr))
|
|
goto do_notify;
|
|
else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
|
|
&sa6_dst->sin6_addr) ||
|
|
inp->inp_socket == 0 ||
|
|
(lport && inp->inp_lport != lport) ||
|
|
(!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
|
|
!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
|
|
&sa6_src.sin6_addr)) ||
|
|
(fport && inp->inp_fport != fport)) {
|
|
INP_WUNLOCK(inp);
|
|
continue;
|
|
}
|
|
|
|
do_notify:
|
|
if (notify) {
|
|
if ((*notify)(inp, errno))
|
|
INP_WUNLOCK(inp);
|
|
} else
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
INP_INFO_WUNLOCK(pcbinfo);
|
|
}
|
|
|
|
/*
|
|
* Lookup a PCB based on the local address and port.
|
|
*/
|
|
struct inpcb *
|
|
in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
|
|
u_int lport_arg, int wild_okay)
|
|
{
|
|
register struct inpcb *inp;
|
|
int matchwild = 3, wildcard;
|
|
u_short lport = lport_arg;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
|
|
if (!wild_okay) {
|
|
struct inpcbhead *head;
|
|
/*
|
|
* Look for an unconnected (wildcard foreign addr) PCB that
|
|
* matches the local address and port we're looking for.
|
|
*/
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
|
|
0, pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == 0)
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
|
|
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
|
|
inp->inp_lport == lport) {
|
|
/*
|
|
* Found.
|
|
*/
|
|
return (inp);
|
|
}
|
|
}
|
|
/*
|
|
* Not found.
|
|
*/
|
|
return (NULL);
|
|
} else {
|
|
struct inpcbporthead *porthash;
|
|
struct inpcbport *phd;
|
|
struct inpcb *match = NULL;
|
|
/*
|
|
* Best fit PCB lookup.
|
|
*
|
|
* First see if this local port is in use by looking on the
|
|
* port hash list.
|
|
*/
|
|
porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
|
|
pcbinfo->ipi_porthashmask)];
|
|
LIST_FOREACH(phd, porthash, phd_hash) {
|
|
if (phd->phd_port == lport)
|
|
break;
|
|
}
|
|
if (phd != NULL) {
|
|
/*
|
|
* Port is in use by one or more PCBs. Look for best
|
|
* fit.
|
|
*/
|
|
LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
|
|
wildcard = 0;
|
|
if ((inp->inp_vflag & INP_IPV6) == 0)
|
|
continue;
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
|
|
wildcard++;
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(
|
|
&inp->in6p_laddr)) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(laddr))
|
|
wildcard++;
|
|
else if (!IN6_ARE_ADDR_EQUAL(
|
|
&inp->in6p_laddr, laddr))
|
|
continue;
|
|
} else {
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(laddr))
|
|
wildcard++;
|
|
}
|
|
if (wildcard < matchwild) {
|
|
match = inp;
|
|
matchwild = wildcard;
|
|
if (matchwild == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return (match);
|
|
}
|
|
}
|
|
|
|
void
|
|
in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
|
|
{
|
|
struct in6pcb *in6p;
|
|
struct ip6_moptions *im6o;
|
|
struct in6_multi_mship *imm, *nimm;
|
|
|
|
INP_INFO_RLOCK(pcbinfo);
|
|
LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) {
|
|
INP_WLOCK(in6p);
|
|
im6o = in6p->in6p_moptions;
|
|
if ((in6p->inp_vflag & INP_IPV6) &&
|
|
im6o) {
|
|
/*
|
|
* Unselect the outgoing interface if it is being
|
|
* detached.
|
|
*/
|
|
if (im6o->im6o_multicast_ifp == ifp)
|
|
im6o->im6o_multicast_ifp = NULL;
|
|
|
|
/*
|
|
* Drop multicast group membership if we joined
|
|
* through the interface being detached.
|
|
* XXX controversial - is it really legal for kernel
|
|
* to force this?
|
|
*/
|
|
for (imm = im6o->im6o_memberships.lh_first;
|
|
imm != NULL; imm = nimm) {
|
|
nimm = imm->i6mm_chain.le_next;
|
|
if (imm->i6mm_maddr->in6m_ifp == ifp) {
|
|
LIST_REMOVE(imm, i6mm_chain);
|
|
in6_delmulti(imm->i6mm_maddr);
|
|
free(imm, M_IP6MADDR);
|
|
}
|
|
}
|
|
}
|
|
INP_WUNLOCK(in6p);
|
|
}
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
}
|
|
|
|
/*
|
|
* Check for alternatives when higher level complains
|
|
* about service problems. For now, invalidate cached
|
|
* routing information. If the route was created dynamically
|
|
* (by a redirect), time to try a default gateway again.
|
|
*/
|
|
void
|
|
in6_losing(struct inpcb *in6p)
|
|
{
|
|
|
|
/*
|
|
* We don't store route pointers in the routing table anymore
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* After a routing change, flush old routing
|
|
* and allocate a (hopefully) better one.
|
|
*/
|
|
struct inpcb *
|
|
in6_rtchange(struct inpcb *inp, int errno)
|
|
{
|
|
/*
|
|
* We don't store route pointers in the routing table anymore
|
|
*/
|
|
return inp;
|
|
}
|
|
|
|
/*
|
|
* Lookup PCB in hash list.
|
|
*/
|
|
struct inpcb *
|
|
in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
|
|
u_int fport_arg, struct in6_addr *laddr, u_int lport_arg,
|
|
int wildcard, struct ifnet *ifp)
|
|
{
|
|
struct inpcbhead *head;
|
|
register struct inpcb *inp;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
int faith;
|
|
|
|
INP_INFO_LOCK_ASSERT(pcbinfo);
|
|
|
|
if (faithprefix_p != NULL)
|
|
faith = (*faithprefix_p)(laddr);
|
|
else
|
|
faith = 0;
|
|
|
|
/*
|
|
* First look for an exact match.
|
|
*/
|
|
head = &pcbinfo->ipi_hashbase[
|
|
INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport,
|
|
pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == 0)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
|
|
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
|
|
inp->inp_fport == fport &&
|
|
inp->inp_lport == lport) {
|
|
/*
|
|
* Found.
|
|
*/
|
|
return (inp);
|
|
}
|
|
}
|
|
if (wildcard) {
|
|
struct inpcb *local_wild = NULL;
|
|
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
|
|
0, pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == 0)
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
|
|
inp->inp_lport == lport) {
|
|
if (faith && (inp->inp_flags & INP_FAITH) == 0)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
|
|
laddr))
|
|
return (inp);
|
|
else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
|
|
local_wild = inp;
|
|
}
|
|
}
|
|
return (local_wild);
|
|
}
|
|
|
|
/*
|
|
* Not found.
|
|
*/
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
|
|
{
|
|
struct ip6_hdr *ip;
|
|
|
|
ip = mtod(m, struct ip6_hdr *);
|
|
bzero(sin6, sizeof(*sin6));
|
|
sin6->sin6_len = sizeof(*sin6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_addr = ip->ip6_src;
|
|
|
|
(void)sa6_recoverscope(sin6); /* XXX: should catch errors... */
|
|
|
|
return;
|
|
}
|