f7abb16323
The sys/netipsec policy-cache (added by Jason Thorpe as a rewrite of the KAME per-PCB policy cache) assumes that policy-cacheable PCBs always has a non-NULL inph_sp in the common PCB header. So we must do all the per-PCB policy cache calls when either (KAME) IPSEC, or FAST_IPSEC is defined. ``Make it so''. We can now support non-IPsec'ed IPv6 traffic, when both ``options FAST_IPSEC'' and ``options INET6'' are configured.
1113 lines
31 KiB
C
1113 lines
31 KiB
C
/* $NetBSD: in6_pcb.c,v 1.64 2004/04/26 01:53:59 jonathan Exp $ */
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/* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $ */
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/*
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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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/*
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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
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
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* 3. 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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__KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.64 2004/04/26 01:53:59 jonathan Exp $");
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#include "opt_inet.h"
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#include "opt_ipsec.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/ioctl.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 <net/if.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/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/nd6.h>
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#include "loop.h"
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extern struct ifnet loif[NLOOP];
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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 <netkey/key.h>
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#endif /* IPSEC */
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#ifdef FAST_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 /* FAST_IPSEC */
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struct in6_addr zeroin6_addr;
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#define IN6PCBHASH_PORT(table, lport) \
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&(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash]
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#define IN6PCBHASH_BIND(table, laddr, lport) \
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&(table)->inpt_bindhashtbl[ \
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(((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
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(laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \
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(table)->inpt_bindhash]
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#define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \
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&(table)->inpt_bindhashtbl[ \
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((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \
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(faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \
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(((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \
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(laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \
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ntohs(lport))) & (table)->inpt_bindhash]
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int ip6_anonportmin = IPV6PORT_ANONMIN;
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int ip6_anonportmax = IPV6PORT_ANONMAX;
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int ip6_lowportmin = IPV6PORT_RESERVEDMIN;
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int ip6_lowportmax = IPV6PORT_RESERVEDMAX;
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POOL_INIT(in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", NULL);
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void
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in6_pcbinit(table, bindhashsize, connecthashsize)
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struct inpcbtable *table;
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int bindhashsize, connecthashsize;
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{
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in_pcbinit(table, bindhashsize, connecthashsize);
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table->inpt_lastport = (u_int16_t)ip6_anonportmax;
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}
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int
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in6_pcballoc(so, v)
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struct socket *so;
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void *v;
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{
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struct inpcbtable *table = v;
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struct in6pcb *in6p;
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int s;
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#if defined(IPSEC) || defined(FAST_IPSEC)
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int error;
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#endif
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in6p = pool_get(&in6pcb_pool, PR_NOWAIT);
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if (in6p == NULL)
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return (ENOBUFS);
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bzero((caddr_t)in6p, sizeof(*in6p));
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in6p->in6p_af = AF_INET6;
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in6p->in6p_table = table;
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in6p->in6p_socket = so;
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in6p->in6p_hops = -1; /* use kernel default */
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in6p->in6p_icmp6filt = NULL;
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#if defined(IPSEC) || defined(FAST_IPSEC)
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error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp);
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if (error != 0) {
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pool_put(&in6pcb_pool, in6p);
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return error;
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}
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#endif /* IPSEC */
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s = splnet();
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CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p,
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inph_queue);
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LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
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&in6p->in6p_head, inph_lhash);
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in6_pcbstate(in6p, IN6P_ATTACHED);
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splx(s);
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if (ip6_v6only)
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in6p->in6p_flags |= IN6P_IPV6_V6ONLY;
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so->so_pcb = (caddr_t)in6p;
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return (0);
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}
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int
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in6_pcbbind(v, nam, p)
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void *v;
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struct mbuf *nam;
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struct proc *p;
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{
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struct in6pcb *in6p = v;
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struct socket *so = in6p->in6p_socket;
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struct inpcbtable *table = in6p->in6p_table;
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struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
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u_int16_t lport = 0;
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int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
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if (in6p->in6p_af != AF_INET6)
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return (EINVAL);
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if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->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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((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
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(so->so_options & SO_ACCEPTCONN) == 0))
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wild = 1;
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if (nam) {
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sin6 = mtod(nam, struct sockaddr_in6 *);
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if (nam->m_len != sizeof(*sin6))
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return (EINVAL);
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/*
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* We should check the family, but old programs
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* incorrectly fail to intialize it.
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*/
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if (sin6->sin6_family != AF_INET6)
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return (EAFNOSUPPORT);
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#ifndef INET
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if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
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return (EADDRNOTAVAIL);
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#endif
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/* KAME hack: embed scopeid */
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if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, NULL) != 0)
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return EINVAL;
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/* this must be cleared for ifa_ifwithaddr() */
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sin6->sin6_scope_id = 0;
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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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}
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else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
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if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
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return (EINVAL);
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if (sin6->sin6_addr.s6_addr32[3]) {
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struct sockaddr_in sin;
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bzero(&sin, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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bcopy(&sin6->sin6_addr.s6_addr32[3],
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&sin.sin_addr, sizeof(sin.sin_addr));
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if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0)
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return EADDRNOTAVAIL;
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}
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}
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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 ((in6p->in6p_flags & IN6P_FAITH) == 0 &&
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(ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
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return (EADDRNOTAVAIL);
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/*
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* bind to an anycast address might accidentally
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* cause sending a packet with an anycast source
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* address, so we forbid it.
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*
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* We should allow to bind to a deprecated address,
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* since the application dare to use it.
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* But, can we assume that they are careful enough
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* to check if the address is deprecated or not?
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* Maybe, as a safeguard, we should have a setsockopt
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* flag to control the bind(2) behavior against
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* deprecated addresses (default: forbid bind(2)).
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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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if (lport) {
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#ifndef IPNOPRIVPORTS
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int priv;
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/*
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* NOTE: all operating systems use suser() for
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* privilege check! do not rewrite it into SS_PRIV.
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*/
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priv = (p && !suser(p->p_ucred, &p->p_acflag)) ? 1 : 0;
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/* GROSS */
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if (ntohs(lport) < IPV6PORT_RESERVED && !priv)
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return (EACCES);
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#endif
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if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
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#ifdef INET
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struct inpcb *t;
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t = in_pcblookup_port(table,
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*(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
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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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#else
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return (EADDRNOTAVAIL);
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#endif
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}
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{
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struct in6pcb *t;
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t = in6_pcblookup_port(table, &sin6->sin6_addr,
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lport, wild);
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if (t && (reuseport & t->in6p_socket->so_options) == 0)
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return (EADDRINUSE);
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}
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}
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in6p->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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e = in6_pcbsetport(&in6p->in6p_laddr, in6p, p);
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if (e != 0)
|
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return (e);
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} else {
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in6p->in6p_lport = lport;
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in6_pcbstate(in6p, IN6P_BOUND);
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}
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LIST_REMOVE(&in6p->in6p_head, inph_lhash);
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LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport),
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&in6p->in6p_head, inph_lhash);
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|
|
#if 0
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in6p->in6p_flowinfo = 0; /* XXX */
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#endif
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return (0);
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}
|
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|
|
/*
|
|
* Connect from a socket to a specified address.
|
|
* Both address and port must be specified in argument sin6.
|
|
* If don't have a local address for this socket yet,
|
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* then pick one.
|
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*/
|
|
int
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in6_pcbconnect(v, nam)
|
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void *v;
|
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struct mbuf *nam;
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{
|
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struct in6pcb *in6p = v;
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|
struct in6_addr *in6a = NULL;
|
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struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
|
|
struct ifnet *ifp = NULL; /* outgoing interface */
|
|
int error = 0;
|
|
#ifdef INET
|
|
struct in6_addr mapped;
|
|
#endif
|
|
struct sockaddr_in6 tmp;
|
|
|
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(void)&in6a; /* XXX fool gcc */
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|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return (EINVAL);
|
|
|
|
if (nam->m_len != sizeof(*sin6))
|
|
return (EINVAL);
|
|
if (sin6->sin6_family != AF_INET6)
|
|
return (EAFNOSUPPORT);
|
|
if (sin6->sin6_port == 0)
|
|
return (EADDRNOTAVAIL);
|
|
|
|
/* sanity check for mapped address case */
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
return EINVAL;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
|
|
in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
|
|
if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
|
|
return EINVAL;
|
|
} else
|
|
{
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
|
|
return EINVAL;
|
|
}
|
|
|
|
/* protect *sin6 from overwrites */
|
|
tmp = *sin6;
|
|
sin6 = &tmp;
|
|
|
|
/* KAME hack: embed scopeid */
|
|
if (in6_embedscope(&sin6->sin6_addr, sin6, in6p, &ifp) != 0)
|
|
return EINVAL;
|
|
|
|
/* Source address selection. */
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
|
|
in6p->in6p_laddr.s6_addr32[3] == 0) {
|
|
#ifdef INET
|
|
struct sockaddr_in sin, *sinp;
|
|
|
|
bzero(&sin, sizeof(sin));
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_family = AF_INET;
|
|
bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr,
|
|
sizeof(sin.sin_addr));
|
|
sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route,
|
|
in6p->in6p_socket->so_options, NULL, &error);
|
|
if (sinp == 0) {
|
|
if (error == 0)
|
|
error = EADDRNOTAVAIL;
|
|
return (error);
|
|
}
|
|
bzero(&mapped, sizeof(mapped));
|
|
mapped.s6_addr16[5] = htons(0xffff);
|
|
bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr));
|
|
in6a = &mapped;
|
|
#else
|
|
return EADDRNOTAVAIL;
|
|
#endif
|
|
} else
|
|
{
|
|
/*
|
|
* XXX: in6_selectsrc might replace the bound local address
|
|
* with the address specified by setsockopt(IPV6_PKTINFO).
|
|
* Is it the intended behavior?
|
|
*/
|
|
in6a = in6_selectsrc(sin6, in6p->in6p_outputopts,
|
|
in6p->in6p_moptions,
|
|
&in6p->in6p_route,
|
|
&in6p->in6p_laddr, &error);
|
|
if (in6a == 0) {
|
|
if (error == 0)
|
|
error = EADDRNOTAVAIL;
|
|
return (error);
|
|
}
|
|
}
|
|
if (in6p->in6p_route.ro_rt)
|
|
ifp = in6p->in6p_route.ro_rt->rt_ifp;
|
|
|
|
in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp);
|
|
|
|
if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr,
|
|
sin6->sin6_port,
|
|
IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr,
|
|
in6p->in6p_lport, 0))
|
|
return (EADDRINUSE);
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ||
|
|
(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
|
|
in6p->in6p_laddr.s6_addr32[3] == 0))
|
|
{
|
|
if (in6p->in6p_lport == 0) {
|
|
(void)in6_pcbbind(in6p, (struct mbuf *)0,
|
|
(struct proc *)0);
|
|
}
|
|
in6p->in6p_laddr = *in6a;
|
|
}
|
|
in6p->in6p_faddr = sin6->sin6_addr;
|
|
in6p->in6p_fport = sin6->sin6_port;
|
|
in6_pcbstate(in6p, IN6P_CONNECTED);
|
|
in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
|
|
if (ip6_auto_flowlabel)
|
|
in6p->in6p_flowinfo |=
|
|
(htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
|
if (in6p->in6p_socket->so_type == SOCK_STREAM)
|
|
ipsec_pcbconn(in6p->in6p_sp);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
in6_pcbdisconnect(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr));
|
|
in6p->in6p_fport = 0;
|
|
in6_pcbstate(in6p, IN6P_BOUND);
|
|
in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
|
ipsec_pcbdisconn(in6p->in6p_sp);
|
|
#endif
|
|
if (in6p->in6p_socket->so_state & SS_NOFDREF)
|
|
in6_pcbdetach(in6p);
|
|
}
|
|
|
|
void
|
|
in6_pcbdetach(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
struct socket *so = in6p->in6p_socket;
|
|
int s;
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
|
ipsec6_delete_pcbpolicy(in6p);
|
|
#endif /* IPSEC */
|
|
sotoin6pcb(so) = 0;
|
|
sofree(so);
|
|
if (in6p->in6p_options)
|
|
m_freem(in6p->in6p_options);
|
|
if (in6p->in6p_outputopts) {
|
|
if (in6p->in6p_outputopts->ip6po_rthdr &&
|
|
in6p->in6p_outputopts->ip6po_route.ro_rt)
|
|
RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt);
|
|
if (in6p->in6p_outputopts->ip6po_m)
|
|
(void)m_free(in6p->in6p_outputopts->ip6po_m);
|
|
free(in6p->in6p_outputopts, M_IP6OPT);
|
|
}
|
|
if (in6p->in6p_route.ro_rt)
|
|
rtfree(in6p->in6p_route.ro_rt);
|
|
ip6_freemoptions(in6p->in6p_moptions);
|
|
s = splnet();
|
|
in6_pcbstate(in6p, IN6P_ATTACHED);
|
|
LIST_REMOVE(&in6p->in6p_head, inph_lhash);
|
|
CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head,
|
|
inph_queue);
|
|
splx(s);
|
|
pool_put(&in6pcb_pool, in6p);
|
|
}
|
|
|
|
void
|
|
in6_setsockaddr(in6p, nam)
|
|
struct in6pcb *in6p;
|
|
struct mbuf *nam;
|
|
{
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
nam->m_len = sizeof(*sin6);
|
|
sin6 = mtod(nam, struct sockaddr_in6 *);
|
|
bzero((caddr_t)sin6, sizeof(*sin6));
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_port = in6p->in6p_lport;
|
|
/* KAME hack: recover scopeid */
|
|
(void)in6_recoverscope(sin6, &in6p->in6p_laddr, NULL);
|
|
}
|
|
|
|
void
|
|
in6_setpeeraddr(in6p, nam)
|
|
struct in6pcb *in6p;
|
|
struct mbuf *nam;
|
|
{
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
nam->m_len = sizeof(*sin6);
|
|
sin6 = mtod(nam, struct sockaddr_in6 *);
|
|
bzero((caddr_t)sin6, sizeof(*sin6));
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6->sin6_port = in6p->in6p_fport;
|
|
/* KAME hack: recover scopeid */
|
|
(void)in6_recoverscope(sin6, &in6p->in6p_faddr, NULL);
|
|
}
|
|
|
|
/*
|
|
* 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 splsoftnet.
|
|
*
|
|
* Note: src (4th arg) carries the flowlabel value on the original IPv6
|
|
* header, in sin6_flowinfo member.
|
|
*/
|
|
int
|
|
in6_pcbnotify(table, dst, fport_arg, src, lport_arg, cmd, cmdarg, notify)
|
|
struct inpcbtable *table;
|
|
struct sockaddr *dst, *src;
|
|
u_int fport_arg, lport_arg;
|
|
int cmd;
|
|
void *cmdarg;
|
|
void (*notify) __P((struct in6pcb *, int));
|
|
{
|
|
struct in6pcb *in6p, *nin6p;
|
|
struct sockaddr_in6 sa6_src, *sa6_dst;
|
|
u_int16_t fport = fport_arg, lport = lport_arg;
|
|
int errno;
|
|
int nmatch = 0;
|
|
u_int32_t flowinfo;
|
|
|
|
if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6)
|
|
return 0;
|
|
|
|
sa6_dst = (struct sockaddr_in6 *)dst;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr))
|
|
return 0;
|
|
|
|
/*
|
|
* note that src can be NULL when we get notify by local fragmentation.
|
|
*/
|
|
sa6_src = (src == NULL) ? sa6_any : *(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];
|
|
for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
|
|
in6p != (void *)&table->inpt_queue;
|
|
in6p = nin6p) {
|
|
nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
/*
|
|
* Under the following condition, notify of redirects
|
|
* to the pcb, without making address matches against inpcb.
|
|
* - redirect notification is arrived.
|
|
* - the inpcb is unconnected.
|
|
* - the inpcb is caching !RTF_HOST routing entry.
|
|
* - the ICMPv6 notification is from the gateway cached in the
|
|
* inpcb. i.e. ICMPv6 notification is from nexthop gateway
|
|
* the inpcb used very recently.
|
|
*
|
|
* This is to improve interaction between netbsd/openbsd
|
|
* redirect handling code, and inpcb route cache code.
|
|
* without the clause, !RTF_HOST routing entry (which carries
|
|
* gateway used by inpcb right before the ICMPv6 redirect)
|
|
* will be cached forever in unconnected inpcb.
|
|
*
|
|
* There still is a question regarding to what is TRT:
|
|
* - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be
|
|
* generated on packet output. inpcb will always cache
|
|
* RTF_HOST routing entry so there's no need for the clause
|
|
* (ICMPv6 redirect will update RTF_HOST routing entry,
|
|
* and inpcb is caching it already).
|
|
* However, bsdi/freebsd are vulnerable to local DoS attacks
|
|
* due to the cloned routing entries.
|
|
* - Specwise, "destination cache" is mentioned in RFC2461.
|
|
* Jinmei says that it implies bsdi/freebsd behavior, itojun
|
|
* is not really convinced.
|
|
* - Having hiwat/lowat on # of cloned host route (redirect/
|
|
* pmtud) may be a good idea. netbsd/openbsd has it. see
|
|
* icmp6_mtudisc_update().
|
|
*/
|
|
if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) &&
|
|
IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
|
|
in6p->in6p_route.ro_rt &&
|
|
!(in6p->in6p_route.ro_rt->rt_flags & RTF_HOST)) {
|
|
struct sockaddr_in6 *dst6;
|
|
|
|
dst6 = (struct sockaddr_in6 *)&in6p->in6p_route.ro_dst;
|
|
if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr,
|
|
&sa6_dst->sin6_addr))
|
|
goto do_notify;
|
|
}
|
|
|
|
/*
|
|
* Detect if we should notify the error. If no source and
|
|
* destination ports are specified, 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 &&
|
|
in6p->in6p_socket != NULL &&
|
|
flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
|
|
IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr))
|
|
goto do_notify;
|
|
else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
|
|
&sa6_dst->sin6_addr) ||
|
|
in6p->in6p_socket == 0 ||
|
|
(lport && in6p->in6p_lport != lport) ||
|
|
(!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
|
|
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
|
|
&sa6_src.sin6_addr)) ||
|
|
(fport && in6p->in6p_fport != fport))
|
|
continue;
|
|
|
|
do_notify:
|
|
if (notify)
|
|
(*notify)(in6p, errno);
|
|
nmatch++;
|
|
}
|
|
return nmatch;
|
|
}
|
|
|
|
void
|
|
in6_pcbpurgeif0(table, ifp)
|
|
struct inpcbtable *table;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct in6pcb *in6p, *nin6p;
|
|
struct ip6_moptions *im6o;
|
|
struct in6_multi_mship *imm, *nimm;
|
|
|
|
for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
|
|
in6p != (void *)&table->inpt_queue;
|
|
in6p = nin6p) {
|
|
nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
im6o = in6p->in6p_moptions;
|
|
if (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_leavegroup(imm);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
in6_pcbpurgeif(table, ifp)
|
|
struct inpcbtable *table;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct in6pcb *in6p, *nin6p;
|
|
|
|
for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue);
|
|
in6p != (void *)&table->inpt_queue;
|
|
in6p = nin6p) {
|
|
nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue);
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
if (in6p->in6p_route.ro_rt != NULL &&
|
|
in6p->in6p_route.ro_rt->rt_ifp == ifp)
|
|
in6_rtchange(in6p, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 in6pcb *in6p;
|
|
{
|
|
struct rtentry *rt;
|
|
struct rt_addrinfo info;
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
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(in6p, errno)
|
|
struct in6pcb *in6p;
|
|
int errno;
|
|
{
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
if (in6p->in6p_route.ro_rt) {
|
|
rtfree(in6p->in6p_route.ro_rt);
|
|
in6p->in6p_route.ro_rt = 0;
|
|
/*
|
|
* A new route can be allocated the next time
|
|
* output is attempted.
|
|
*/
|
|
}
|
|
}
|
|
|
|
struct in6pcb *
|
|
in6_pcblookup_port(table, laddr6, lport_arg, lookup_wildcard)
|
|
struct inpcbtable *table;
|
|
struct in6_addr *laddr6;
|
|
u_int lport_arg;
|
|
int lookup_wildcard;
|
|
{
|
|
struct inpcbhead *head;
|
|
struct inpcb_hdr *inph;
|
|
struct in6pcb *in6p, *match = 0;
|
|
int matchwild = 3, wildcard;
|
|
u_int16_t lport = lport_arg;
|
|
|
|
head = IN6PCBHASH_PORT(table, lport);
|
|
LIST_FOREACH(inph, head, inph_lhash) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
wildcard = 0;
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
}
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
|
|
wildcard++;
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) {
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
if (!IN6_IS_ADDR_V4MAPPED(laddr6))
|
|
continue;
|
|
|
|
/* duplicate of IPv4 logic */
|
|
wildcard = 0;
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) &&
|
|
in6p->in6p_faddr.s6_addr32[3])
|
|
wildcard++;
|
|
if (!in6p->in6p_laddr.s6_addr32[3]) {
|
|
if (laddr6->s6_addr32[3])
|
|
wildcard++;
|
|
} else {
|
|
if (!laddr6->s6_addr32[3])
|
|
wildcard++;
|
|
else {
|
|
if (in6p->in6p_laddr.s6_addr32[3] !=
|
|
laddr6->s6_addr32[3])
|
|
continue;
|
|
}
|
|
}
|
|
} else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
}
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
|
|
wildcard++;
|
|
} else {
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
}
|
|
if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
|
|
wildcard++;
|
|
else {
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
|
|
laddr6))
|
|
continue;
|
|
}
|
|
}
|
|
if (wildcard && !lookup_wildcard)
|
|
continue;
|
|
if (wildcard < matchwild) {
|
|
match = in6p;
|
|
matchwild = wildcard;
|
|
if (matchwild == 0)
|
|
break;
|
|
}
|
|
}
|
|
return (match);
|
|
}
|
|
#undef continue
|
|
|
|
/*
|
|
* WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to
|
|
* IPv4 mapped address.
|
|
*/
|
|
struct rtentry *
|
|
in6_pcbrtentry(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
struct route_in6 *ro;
|
|
struct sockaddr_in6 *dst6;
|
|
|
|
ro = &in6p->in6p_route;
|
|
dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return (NULL);
|
|
|
|
if (ro->ro_rt && ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
|
|
!IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, &in6p->in6p_faddr))) {
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = (struct rtentry *)NULL;
|
|
}
|
|
#ifdef INET
|
|
if (ro->ro_rt == (struct rtentry *)NULL &&
|
|
IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) {
|
|
struct sockaddr_in *dst = (struct sockaddr_in *)&ro->ro_dst;
|
|
|
|
bzero(dst, sizeof(*dst));
|
|
dst->sin_family = AF_INET;
|
|
dst->sin_len = sizeof(struct sockaddr_in);
|
|
bcopy(&in6p->in6p_faddr.s6_addr32[3], &dst->sin_addr,
|
|
sizeof(dst->sin_addr));
|
|
rtalloc((struct route *)ro);
|
|
} else
|
|
#endif
|
|
if (ro->ro_rt == (struct rtentry *)NULL &&
|
|
!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
bzero(dst6, sizeof(*dst6));
|
|
dst6->sin6_family = AF_INET6;
|
|
dst6->sin6_len = sizeof(struct sockaddr_in6);
|
|
dst6->sin6_addr = in6p->in6p_faddr;
|
|
rtalloc((struct route *)ro);
|
|
}
|
|
return (ro->ro_rt);
|
|
}
|
|
|
|
struct in6pcb *
|
|
in6_pcblookup_connect(table, faddr6, fport_arg, laddr6, lport_arg, faith)
|
|
struct inpcbtable *table;
|
|
struct in6_addr *faddr6, *laddr6;
|
|
u_int fport_arg, lport_arg;
|
|
int faith;
|
|
{
|
|
struct inpcbhead *head;
|
|
struct inpcb_hdr *inph;
|
|
struct in6pcb *in6p;
|
|
u_int16_t fport = fport_arg, lport = lport_arg;
|
|
|
|
head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport);
|
|
LIST_FOREACH(inph, head, inph_hash) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
/* find exact match on both source and dest */
|
|
if (in6p->in6p_fport != fport)
|
|
continue;
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
|
|
continue;
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6))
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
|
|
continue;
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
|
|
continue;
|
|
if ((IN6_IS_ADDR_V4MAPPED(laddr6) ||
|
|
IN6_IS_ADDR_V4MAPPED(faddr6)) &&
|
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY))
|
|
continue;
|
|
return in6p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct in6pcb *
|
|
in6_pcblookup_bind(table, laddr6, lport_arg, faith)
|
|
struct inpcbtable *table;
|
|
struct in6_addr *laddr6;
|
|
u_int lport_arg;
|
|
int faith;
|
|
{
|
|
struct inpcbhead *head;
|
|
struct inpcb_hdr *inph;
|
|
struct in6pcb *in6p;
|
|
u_int16_t lport = lport_arg;
|
|
#ifdef INET
|
|
struct in6_addr zero_mapped;
|
|
#endif
|
|
|
|
head = IN6PCBHASH_BIND(table, laddr6, lport);
|
|
LIST_FOREACH(inph, head, inph_hash) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
|
|
continue;
|
|
if (in6p->in6p_fport != 0)
|
|
continue;
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
|
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
|
|
goto out;
|
|
}
|
|
#ifdef INET
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
|
|
memset(&zero_mapped, 0, sizeof(zero_mapped));
|
|
zero_mapped.s6_addr16[5] = 0xffff;
|
|
head = IN6PCBHASH_BIND(table, &zero_mapped, lport);
|
|
LIST_FOREACH(inph, head, inph_hash) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
|
|
continue;
|
|
if (in6p->in6p_fport != 0)
|
|
continue;
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped))
|
|
goto out;
|
|
}
|
|
}
|
|
#endif
|
|
head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport);
|
|
LIST_FOREACH(inph, head, inph_hash) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
|
|
if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
|
|
continue;
|
|
if (in6p->in6p_fport != 0)
|
|
continue;
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
|
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0)
|
|
continue;
|
|
if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr))
|
|
goto out;
|
|
}
|
|
return (NULL);
|
|
|
|
out:
|
|
inph = &in6p->in6p_head;
|
|
if (inph != LIST_FIRST(head)) {
|
|
LIST_REMOVE(inph, inph_hash);
|
|
LIST_INSERT_HEAD(head, inph, inph_hash);
|
|
}
|
|
return in6p;
|
|
}
|
|
|
|
void
|
|
in6_pcbstate(in6p, state)
|
|
struct in6pcb *in6p;
|
|
int state;
|
|
{
|
|
|
|
if (in6p->in6p_af != AF_INET6)
|
|
return;
|
|
|
|
if (in6p->in6p_state > IN6P_ATTACHED)
|
|
LIST_REMOVE(&in6p->in6p_head, inph_hash);
|
|
|
|
switch (state) {
|
|
case IN6P_BOUND:
|
|
LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table,
|
|
&in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
|
|
inph_hash);
|
|
break;
|
|
case IN6P_CONNECTED:
|
|
LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table,
|
|
&in6p->in6p_faddr, in6p->in6p_fport,
|
|
&in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head,
|
|
inph_hash);
|
|
break;
|
|
}
|
|
|
|
in6p->in6p_state = state;
|
|
}
|