1124 lines
30 KiB
C
1124 lines
30 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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* $FreeBSD$
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* $FreeBSD$
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*/
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#include "opt_key.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/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/proc.h>
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#include <sys/jail.h>
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#include <vm/vm_zone.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 <netinet6/ip6.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 "faith.h"
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#include <netinet6/ipsec6.h>
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#include <netkey/key.h>
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#ifdef KEY_DEBUG
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#include <netkey/key_debug.h>
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#else
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#define DPRINTF(lev,arg)
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#define DDO(lev, stmt)
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#define DP(x, y, z)
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#endif /* KEY_DEBUG */
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#endif /* IPSEC */
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struct in6_addr zeroin6_addr;
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int
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in6_pcbbind(inp, nam, p)
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register struct inpcb *inp;
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struct sockaddr *nam;
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struct proc *p;
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{
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struct socket *so = inp->inp_socket;
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unsigned short *lastport;
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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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int error;
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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 = 1;
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if (nam) {
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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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/*
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* If the scope of the destination is link-local, embed the
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* interface index in the address.
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*/
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if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
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/* XXX boundary check is assumed to be already done. */
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/* XXX sin6_scope_id is weaker than advanced-api. */
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struct in6_pktinfo *pi;
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if (inp->in6p_outputopts &&
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(pi = inp->in6p_outputopts->ip6po_pktinfo) &&
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pi->ipi6_ifindex) {
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sin6->sin6_addr.s6_addr16[1]
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= htons(pi->ipi6_ifindex);
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} else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)
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&& inp->in6p_moptions
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&& inp->in6p_moptions->im6o_multicast_ifp) {
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sin6->sin6_addr.s6_addr16[1] =
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htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
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} else if (sin6->sin6_scope_id) {
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/* boundary check */
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if (sin6->sin6_scope_id < 0
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|| if_index < sin6->sin6_scope_id) {
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return ENXIO; /* XXX EINVAL? */
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}
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sin6->sin6_addr.s6_addr16[1]
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= htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
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/* this must be cleared for ifa_ifwithaddr() */
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sin6->sin6_scope_id = 0;
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}
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}
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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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*/
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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|
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IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
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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) < IPV6PORT_RESERVED && p &&
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suser_xxx(0, p, PRISON_ROOT))
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return(EACCES);
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if (so->so_cred->cr_uid != 0 &&
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!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
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t = in6_pcblookup_local(inp->inp_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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(!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 &
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SO_REUSEPORT) == 0) &&
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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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t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr,
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lport, wild);
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if (t && (reuseport & t->inp_socket->so_options) == 0)
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return(EADDRINUSE);
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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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ushort first, last;
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int count;
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inp->inp_flags |= INP_ANONPORT;
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if (inp->inp_flags & INP_HIGHPORT) {
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first = ipport_hifirstauto; /* sysctl */
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last = ipport_hilastauto;
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lastport = &pcbinfo->lasthi;
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} else if (inp->inp_flags & INP_LOWPORT) {
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if (p && (error = suser_xxx(0, p, PRISON_ROOT)))
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return error;
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first = ipport_lowfirstauto; /* 1023 */
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last = ipport_lowlastauto; /* 600 */
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lastport = &pcbinfo->lastlow;
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} else {
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first = ipport_firstauto; /* sysctl */
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last = ipport_lastauto;
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lastport = &pcbinfo->lastport;
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}
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/*
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* Simple check to ensure all ports are not used up causing
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* a deadlock here.
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*
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* We split the two cases (up and down) so that the direction
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* is not being tested on each round of the loop.
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*/
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if (first > last) {
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/*
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* counting down
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*/
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count = first - last;
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do {
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if (count-- < 0) { /* completely used? */
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/*
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* Undo any address bind that may have
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* occurred above.
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*/
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inp->in6p_laddr = in6addr_any;
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return (EAGAIN);
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}
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--*lastport;
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if (*lastport > first || *lastport < last)
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*lastport = first;
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lport = htons(*lastport);
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} while (in6_pcblookup_local(pcbinfo,
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&inp->in6p_laddr, lport, wild));
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} else {
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/*
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* counting up
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*/
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count = last - first;
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do {
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if (count-- < 0) { /* completely used? */
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/*
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* Undo any address bind that may have
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* occurred above.
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*/
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inp->in6p_laddr = in6addr_any;
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return (EAGAIN);
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}
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++*lastport;
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if (*lastport < first || *lastport > last)
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*lastport = first;
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lport = htons(*lastport);
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} while (in6_pcblookup_local(pcbinfo,
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&inp->in6p_laddr, lport, wild));
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}
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}
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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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inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/
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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(inp, nam, plocal_addr6)
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register struct inpcb *inp;
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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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struct in6_pktinfo *pi;
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struct ifnet *ifp = NULL;
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int error = 0;
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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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/*
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* If the scope of the destination is link-local, embed the interface
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* index in the address.
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*/
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if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
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/* XXX boundary check is assumed to be already done. */
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/* XXX sin6_scope_id is weaker than advanced-api. */
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if (inp->in6p_outputopts &&
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(pi = inp->in6p_outputopts->ip6po_pktinfo) &&
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pi->ipi6_ifindex) {
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sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex);
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ifp = ifindex2ifnet[pi->ipi6_ifindex];
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} else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
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inp->in6p_moptions &&
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inp->in6p_moptions->im6o_multicast_ifp) {
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sin6->sin6_addr.s6_addr16[1] =
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htons(inp->in6p_moptions->im6o_multicast_ifp->if_index);
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ifp = ifindex2ifnet[inp->in6p_moptions->im6o_multicast_ifp->if_index];
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} else if (sin6->sin6_scope_id) {
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/* boundary check */
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if (sin6->sin6_scope_id < 0
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|| if_index < sin6->sin6_scope_id) {
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return ENXIO; /* XXX EINVAL? */
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}
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sin6->sin6_addr.s6_addr16[1]
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= htons(sin6->sin6_scope_id & 0xffff);/*XXX*/
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ifp = ifindex2ifnet[sin6->sin6_scope_id];
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}
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}
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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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/*
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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,
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&inp->in6p_route,
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&inp->in6p_laddr, &error);
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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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}
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if (inp->in6p_route.ro_rt)
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ifp = inp->in6p_route.ro_rt->rt_ifp;
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inp->in6p_ip6_hlim = (u_int8_t)in6_selecthlim(inp, ifp);
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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(inp, nam, p)
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register struct inpcb *inp;
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struct sockaddr *nam;
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struct proc *p;
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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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/*
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* Call inner routine, to assign local interface address.
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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, p);
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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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/*
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* xxx kazu flowlabel is necessary for connect?
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|
* but if this line is missing, the garbage value remains.
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*/
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inp->in6p_flowinfo = sin6->sin6_flowinfo;
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|
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in_pcbrehash(inp);
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return (0);
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}
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|
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/*
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|
* Return an IPv6 address, which is the most appropriate for given
|
|
* destination and user specified options.
|
|
* If necessary, this function lookups the routing table and return
|
|
* an entry to the caller for later use.
|
|
*/
|
|
struct in6_addr *
|
|
in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp)
|
|
struct sockaddr_in6 *dstsock;
|
|
struct ip6_pktopts *opts;
|
|
struct ip6_moptions *mopts;
|
|
struct route_in6 *ro;
|
|
struct in6_addr *laddr;
|
|
int *errorp;
|
|
{
|
|
struct in6_addr *dst;
|
|
struct in6_ifaddr *ia6 = 0;
|
|
struct in6_pktinfo *pi = NULL;
|
|
|
|
dst = &dstsock->sin6_addr;
|
|
*errorp = 0;
|
|
|
|
/*
|
|
* If the source address is explicitly specified by the caller,
|
|
* use it.
|
|
*/
|
|
if (opts && (pi = opts->ip6po_pktinfo) &&
|
|
!IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr))
|
|
return(&pi->ipi6_addr);
|
|
|
|
/*
|
|
* If the source address is not specified but the socket(if any)
|
|
* is already bound, use the bound address.
|
|
*/
|
|
if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr))
|
|
return(laddr);
|
|
|
|
/*
|
|
* If the caller doesn't specify the source address but
|
|
* the outgoing interface, use an address associated with
|
|
* the interface.
|
|
*/
|
|
if (pi && pi->ipi6_ifindex) {
|
|
/* XXX boundary check is assumed to be already done. */
|
|
ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex],
|
|
dst);
|
|
if (ia6 == 0) {
|
|
*errorp = EADDRNOTAVAIL;
|
|
return(0);
|
|
}
|
|
return(&satosin6(&ia6->ia_addr)->sin6_addr);
|
|
}
|
|
|
|
/*
|
|
* If the destination address is a link-local unicast address or
|
|
* a multicast address, and if the outgoing interface is specified
|
|
* by the sin6_scope_id filed, use an address associated with the
|
|
* interface.
|
|
* XXX: We're now trying to define more specific semantics of
|
|
* sin6_scope_id field, so this part will be rewritten in
|
|
* the near future.
|
|
*/
|
|
if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) &&
|
|
dstsock->sin6_scope_id) {
|
|
/*
|
|
* I'm not sure if boundary check for scope_id is done
|
|
* somewhere...
|
|
*/
|
|
if (dstsock->sin6_scope_id < 0 ||
|
|
if_index < dstsock->sin6_scope_id) {
|
|
*errorp = ENXIO; /* XXX: better error? */
|
|
return(0);
|
|
}
|
|
ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id],
|
|
dst);
|
|
if (ia6 == 0) {
|
|
*errorp = EADDRNOTAVAIL;
|
|
return(0);
|
|
}
|
|
return(&satosin6(&ia6->ia_addr)->sin6_addr);
|
|
}
|
|
|
|
/*
|
|
* If the destination address is a multicast address and
|
|
* the outgoing interface for the address is specified
|
|
* by the caller, use an address associated with the interface.
|
|
* There is a sanity check here; if the destination has node-local
|
|
* scope, the outgoing interfacde should be a loopback address.
|
|
* Even if the outgoing interface is not specified, we also
|
|
* choose a loopback interface as the outgoing interface.
|
|
*/
|
|
if (IN6_IS_ADDR_MULTICAST(dst)) {
|
|
struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL;
|
|
|
|
if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) {
|
|
ifp = &loif[0];
|
|
}
|
|
|
|
if (ifp) {
|
|
ia6 = in6_ifawithscope(ifp, dst);
|
|
if (ia6 == 0) {
|
|
*errorp = EADDRNOTAVAIL;
|
|
return(0);
|
|
}
|
|
return(&ia6->ia_addr.sin6_addr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the next hop address for the packet is specified
|
|
* by caller, use an address associated with the route
|
|
* to the next hop.
|
|
*/
|
|
{
|
|
struct sockaddr_in6 *sin6_next;
|
|
struct rtentry *rt;
|
|
|
|
if (opts && opts->ip6po_nexthop) {
|
|
sin6_next = satosin6(opts->ip6po_nexthop);
|
|
rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL);
|
|
if (rt) {
|
|
ia6 = in6_ifawithscope(rt->rt_ifp, dst);
|
|
if (ia6 == 0)
|
|
ia6 = ifatoia6(rt->rt_ifa);
|
|
}
|
|
if (ia6 == 0) {
|
|
*errorp = EADDRNOTAVAIL;
|
|
return(0);
|
|
}
|
|
return(&satosin6(&ia6->ia_addr)->sin6_addr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If route is known or can be allocated now,
|
|
* our src addr is taken from the i/f, else punt.
|
|
*/
|
|
if (ro) {
|
|
if (ro->ro_rt &&
|
|
!IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) {
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = (struct rtentry *)0;
|
|
}
|
|
if (ro->ro_rt == (struct rtentry *)0 ||
|
|
ro->ro_rt->rt_ifp == (struct ifnet *)0) {
|
|
/* No route yet, so try to acquire one */
|
|
bzero(&ro->ro_dst, sizeof(struct sockaddr_in6));
|
|
ro->ro_dst.sin6_family = AF_INET6;
|
|
ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
|
|
ro->ro_dst.sin6_addr = *dst;
|
|
if (IN6_IS_ADDR_MULTICAST(dst)) {
|
|
ro->ro_rt = rtalloc1(&((struct route *)ro)
|
|
->ro_dst, 0, 0UL);
|
|
} else {
|
|
rtalloc((struct route *)ro);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* in_pcbconnect() checks out IFF_LOOPBACK to skip using
|
|
* the address. But we don't know why it does so.
|
|
* It is necessary to ensure the scope even for lo0
|
|
* so doesn't check out IFF_LOOPBACK.
|
|
*/
|
|
|
|
if (ro->ro_rt) {
|
|
ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst);
|
|
if (ia6 == 0) /* xxx scope error ?*/
|
|
ia6 = ifatoia6(ro->ro_rt->rt_ifa);
|
|
}
|
|
if (ia6 == 0) {
|
|
*errorp = EHOSTUNREACH; /* no route */
|
|
return(0);
|
|
}
|
|
return(&satosin6(&ia6->ia_addr)->sin6_addr);
|
|
}
|
|
|
|
*errorp = EADDRNOTAVAIL;
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Default hop limit selection. The precedence is as follows:
|
|
* 1. Hoplimit valued specified via ioctl.
|
|
* 2. (If the outgoing interface is detected) the current
|
|
* hop limit of the interface specified by router advertisement.
|
|
* 3. The system default hoplimit.
|
|
*/
|
|
int
|
|
in6_selecthlim(in6p, ifp)
|
|
struct in6pcb *in6p;
|
|
struct ifnet *ifp;
|
|
{
|
|
if (in6p && in6p->in6p_hops >= 0)
|
|
return(in6p->in6p_hops);
|
|
else if (ifp)
|
|
return(nd_ifinfo[ifp->if_index].chlim);
|
|
else
|
|
return(ip6_defhlim);
|
|
}
|
|
|
|
void
|
|
in6_pcbdisconnect(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
|
|
inp->inp_fport = 0;
|
|
in_pcbrehash(inp);
|
|
if (inp->inp_socket->so_state & SS_NOFDREF)
|
|
in6_pcbdetach(inp);
|
|
}
|
|
|
|
void
|
|
in6_pcbdetach(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
struct socket *so = inp->inp_socket;
|
|
struct inpcbinfo *ipi = inp->inp_pcbinfo;
|
|
|
|
#ifdef IPSEC
|
|
if (sotoinpcb(so) != 0)
|
|
key_freeso(so);
|
|
ipsec6_delete_pcbpolicy(inp);
|
|
#endif /* IPSEC */
|
|
inp->inp_gencnt = ++ipi->ipi_gencnt;
|
|
in_pcbremlists(inp);
|
|
sotoinpcb(so) = 0;
|
|
sofree(so);
|
|
if (inp->in6p_options)
|
|
m_freem(inp->in6p_options);
|
|
if (inp->in6p_outputopts) {
|
|
if (inp->in6p_outputopts->ip6po_rthdr &&
|
|
inp->in6p_outputopts->ip6po_route.ro_rt)
|
|
RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt);
|
|
if (inp->in6p_outputopts->ip6po_m)
|
|
(void)m_free(inp->in6p_outputopts->ip6po_m);
|
|
free(inp->in6p_outputopts, M_IP6OPT);
|
|
}
|
|
if (inp->in6p_route.ro_rt)
|
|
rtfree(inp->in6p_route.ro_rt);
|
|
ip6_freemoptions(inp->in6p_moptions);
|
|
inp->inp_vflag = 0;
|
|
zfreei(ipi->ipi_zone, inp);
|
|
}
|
|
|
|
/*
|
|
* The calling convention of in6_setsockaddr() and in6_setpeeraddr() was
|
|
* modified to match the pru_sockaddr() and pru_peeraddr() entry points
|
|
* in struct pr_usrreqs, so that protocols can just reference then directly
|
|
* without the need for a wrapper function. The socket must have a valid
|
|
* (i.e., non-nil) PCB, but it should be impossible to get an invalid one
|
|
* except through a kernel programming error, so it is acceptable to panic
|
|
* (or in this case trap) if the PCB is invalid. (Actually, we don't trap
|
|
* because there actually /is/ a programming error somewhere... XXX)
|
|
*/
|
|
int
|
|
in6_setsockaddr(so, nam)
|
|
struct socket *so;
|
|
struct sockaddr **nam;
|
|
{
|
|
int s;
|
|
register struct inpcb *inp;
|
|
register struct sockaddr_in6 *sin6;
|
|
|
|
/*
|
|
* Do the malloc first in case it blocks.
|
|
*/
|
|
MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK);
|
|
bzero(sin6, sizeof *sin6);
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(*sin6);
|
|
|
|
s = splnet();
|
|
inp = sotoinpcb(so);
|
|
if (!inp) {
|
|
splx(s);
|
|
free(sin6, M_SONAME);
|
|
return EINVAL;
|
|
}
|
|
sin6->sin6_port = inp->inp_lport;
|
|
sin6->sin6_addr = inp->in6p_laddr;
|
|
splx(s);
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
|
|
else
|
|
sin6->sin6_scope_id = 0; /*XXX*/
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_addr.s6_addr16[1] = 0;
|
|
|
|
*nam = (struct sockaddr *)sin6;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_setpeeraddr(so, nam)
|
|
struct socket *so;
|
|
struct sockaddr **nam;
|
|
{
|
|
int s;
|
|
struct inpcb *inp;
|
|
register struct sockaddr_in6 *sin6;
|
|
|
|
/*
|
|
* Do the malloc first in case it blocks.
|
|
*/
|
|
MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
|
|
bzero((caddr_t)sin6, sizeof (*sin6));
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
|
|
s = splnet();
|
|
inp = sotoinpcb(so);
|
|
if (!inp) {
|
|
splx(s);
|
|
free(sin6, M_SONAME);
|
|
return EINVAL;
|
|
}
|
|
sin6->sin6_port = inp->inp_fport;
|
|
sin6->sin6_addr = inp->in6p_faddr;
|
|
splx(s);
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
|
|
else
|
|
sin6->sin6_scope_id = 0; /*XXX*/
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_addr.s6_addr16[1] = 0;
|
|
|
|
*nam = (struct sockaddr *)sin6;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
int error;
|
|
|
|
if (inp == NULL)
|
|
return EINVAL;
|
|
if (inp->inp_vflag & INP_IPV4) {
|
|
error = in_setsockaddr(so, nam);
|
|
if (error == NULL)
|
|
in6_sin_2_v4mapsin6_in_sock(nam);
|
|
} else
|
|
error = in6_setsockaddr(so, nam);
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
int error;
|
|
|
|
if (inp == NULL)
|
|
return EINVAL;
|
|
if (inp->inp_vflag & INP_IPV4) {
|
|
error = in_setpeeraddr(so, nam);
|
|
if (error == NULL)
|
|
in6_sin_2_v4mapsin6_in_sock(nam);
|
|
} else
|
|
error = in6_setpeeraddr(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.
|
|
*
|
|
* Must be called at splnet.
|
|
*/
|
|
void
|
|
in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
|
|
struct inpcbhead *head;
|
|
struct sockaddr *dst;
|
|
u_int fport_arg, lport_arg;
|
|
struct in6_addr *laddr6;
|
|
int cmd;
|
|
void (*notify) __P((struct inpcb *, int));
|
|
{
|
|
struct inpcb *inp, *oinp;
|
|
struct in6_addr faddr6;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
int errno, s;
|
|
|
|
if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
|
|
return;
|
|
faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
|
|
return;
|
|
|
|
/*
|
|
* Redirects go to all references to the destination,
|
|
* and use in_rtchange to invalidate the route cache.
|
|
* Dead host indications: notify all references to the destination.
|
|
* 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)laddr6, sizeof(*laddr6));
|
|
if (cmd != PRC_HOSTDEAD)
|
|
notify = in6_rtchange;
|
|
}
|
|
errno = inet6ctlerrmap[cmd];
|
|
s = splnet();
|
|
for (inp = LIST_FIRST(head); inp != NULL;) {
|
|
if ((inp->inp_vflag & INP_IPV6) == NULL) {
|
|
inp = LIST_NEXT(inp, inp_list);
|
|
continue;
|
|
}
|
|
if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) ||
|
|
inp->inp_socket == 0 ||
|
|
(lport && inp->inp_lport != lport) ||
|
|
(!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
|
|
!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) ||
|
|
(fport && inp->inp_fport != fport)) {
|
|
inp = LIST_NEXT(inp, inp_list);
|
|
continue;
|
|
}
|
|
oinp = inp;
|
|
inp = LIST_NEXT(inp, inp_list);
|
|
if (notify)
|
|
(*notify)(oinp, errno);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Lookup a PCB based on the local address and port.
|
|
*/
|
|
struct inpcb *
|
|
in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
|
|
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;
|
|
|
|
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->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
|
|
pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == NULL)
|
|
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->porthashbase[INP_PCBPORTHASH(lport,
|
|
pcbinfo->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) == NULL)
|
|
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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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(in6p)
|
|
struct inpcb *in6p;
|
|
{
|
|
struct rtentry *rt;
|
|
struct rt_addrinfo info;
|
|
|
|
if ((rt = in6p->in6p_route.ro_rt) != NULL) {
|
|
in6p->in6p_route.ro_rt = 0;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] =
|
|
(struct sockaddr *)&in6p->in6p_route.ro_dst;
|
|
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
|
|
if (rt->rt_flags & RTF_DYNAMIC)
|
|
(void)rtrequest(RTM_DELETE, rt_key(rt),
|
|
rt->rt_gateway, rt_mask(rt), rt->rt_flags,
|
|
(struct rtentry **)0);
|
|
else
|
|
/*
|
|
* A new route can be allocated
|
|
* the next time output is attempted.
|
|
*/
|
|
rtfree(rt);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* After a routing change, flush old routing
|
|
* and allocate a (hopefully) better one.
|
|
*/
|
|
void
|
|
in6_rtchange(inp, errno)
|
|
struct inpcb *inp;
|
|
int errno;
|
|
{
|
|
if (inp->in6p_route.ro_rt) {
|
|
rtfree(inp->in6p_route.ro_rt);
|
|
inp->in6p_route.ro_rt = 0;
|
|
/*
|
|
* A new route can be allocated the next time
|
|
* output is attempted.
|
|
*/
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lookup PCB in hash list.
|
|
*/
|
|
struct inpcb *
|
|
in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
|
|
struct inpcbinfo *pcbinfo;
|
|
struct in6_addr *faddr, *laddr;
|
|
u_int fport_arg, lport_arg;
|
|
int wildcard;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct inpcbhead *head;
|
|
register struct inpcb *inp;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
|
|
/*
|
|
* First look for an exact match.
|
|
*/
|
|
head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */,
|
|
lport, fport,
|
|
pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == NULL)
|
|
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->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
|
|
pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
if ((inp->inp_vflag & INP_IPV6) == NULL)
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
|
|
inp->inp_lport == lport) {
|
|
#if defined(NFAITH) && NFAITH > 0
|
|
if (ifp && ifp->if_type == IFT_FAITH &&
|
|
(inp->inp_flags & INP_FAITH) == 0)
|
|
continue;
|
|
#endif
|
|
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;
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
sin6->sin6_addr.s6_addr16[1] = 0;
|
|
sin6->sin6_scope_id =
|
|
(m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
|
|
? m->m_pkthdr.rcvif->if_index : 0;
|
|
|
|
return;
|
|
}
|