1168 lines
32 KiB
C
1168 lines
32 KiB
C
/* $NetBSD: in6_pcb.c,v 1.22 2000/05/29 00:03:18 itojun Exp $ */
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/* $KAME: in6_pcb.c,v 1.43 2000/05/28 23:25:07 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
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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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*/
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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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#include <netkey/key_debug.h>
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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_pcballoc(so, head)
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struct socket *so;
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struct in6pcb *head;
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{
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struct in6pcb *in6p;
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MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_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_head = head;
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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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in6p->in6p_next = head->in6p_next;
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head->in6p_next = in6p;
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in6p->in6p_prev = head;
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in6p->in6p_next->in6p_prev = in6p;
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#ifndef INET6_BINDV6ONLY
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if (ip6_bindv6only)
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in6p->in6p_flags |= IN6P_BINDV6ONLY;
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#else
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in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/
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#endif
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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(in6p, nam)
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register struct in6pcb *in6p;
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struct mbuf *nam;
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{
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struct socket *so = in6p->in6p_socket;
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struct in6pcb *head = in6p->in6p_head;
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struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL;
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struct proc *p = curproc; /* XXX */
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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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int error;
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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 = IN6PLOOKUP_WILDCARD;
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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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/*
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* since we do not check port number duplicate with IPv4 space,
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* we reject it at this moment. If we leave it, we make normal
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* user to hijack port number from other users.
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*/
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if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
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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
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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 (in6p->in6p_outputopts &&
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(pi = in6p->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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&& in6p->in6p_moptions
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&& in6p->in6p_moptions->im6o_multicast_ifp) {
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sin6->sin6_addr.s6_addr16[1] =
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htons(in6p->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_V4MAPPED(&sin6->sin6_addr)) {
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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], &sin.sin_addr,
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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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} 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 defined(NFAITH) && NFAITH > 0
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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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#else
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if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0)
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#endif
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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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#ifndef IPNOPRIVPORTS
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/* GROSS */
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if (ntohs(lport) < IPV6PORT_RESERVED &&
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(p == 0 ||
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(error = suser(p->p_ucred, &p->p_acflag))))
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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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/* should check this but we can't ... */
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#if 0
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struct inpcb *t;
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t = in_pcblookup_bind(&tcbtable,
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(struct in_addr *)&sin6->sin6_addr.s6_addr32[3],
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lport);
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if (t && (reuseport & t->inp_socket->so_options) == 0)
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return EADDRINUSE;
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#endif
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} else {
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struct in6pcb *t;
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t = in6_pcblookup(head, &zeroin6_addr, 0,
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&sin6->sin6_addr, 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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if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p)) != 0)
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return(e);
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}
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else
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in6p->in6p_lport = lport;
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in6p->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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* Find an empty port and set it to the specified PCB.
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*/
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int
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in6_pcbsetport(laddr, in6p)
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struct in6_addr *laddr;
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struct in6pcb *in6p;
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{
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struct socket *so = in6p->in6p_socket;
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struct in6pcb *head = in6p->in6p_head;
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u_int16_t last_port, lport = 0;
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int wild = 0;
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void *t;
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u_int16_t min, max;
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#ifndef IPNOPRIVPORTS
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struct proc *p = curproc; /*XXX*/
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#endif
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/* XXX: this is redundant when called from in6_pcbbind */
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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 = IN6PLOOKUP_WILDCARD;
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if (in6p->in6p_flags & IN6P_LOWPORT) {
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#ifndef IPNOPRIVPORTS
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if (p == 0 || (suser(p->p_ucred, &p->p_acflag) != 0))
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return (EACCES);
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#endif
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min = IPV6PORT_RESERVEDMIN;
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max = IPV6PORT_RESERVEDMAX;
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} else {
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min = IPV6PORT_ANONMIN;
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max = IPV6PORT_ANONMAX;
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}
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/* value out of range */
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if (head->in6p_lport < min)
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head->in6p_lport = min;
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else if (head->in6p_lport > max)
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head->in6p_lport = min;
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last_port = head->in6p_lport;
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goto startover; /*to randomize*/
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for (;;) {
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lport = htons(head->in6p_lport);
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if (IN6_IS_ADDR_V4MAPPED(laddr)) {
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#if 0
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t = in_pcblookup_bind(&tcbtable,
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(struct in_addr *)&in6p->in6p_laddr.s6_addr32[3],
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lport);
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#else
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t = NULL;
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#endif
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} else {
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t = in6_pcblookup(head, &zeroin6_addr, 0, laddr,
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lport, wild);
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}
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if (t == 0)
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break;
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startover:
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if (head->in6p_lport >= max)
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head->in6p_lport = min;
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else
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head->in6p_lport++;
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if (head->in6p_lport == last_port)
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return (EADDRINUSE);
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}
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in6p->in6p_lport = lport;
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return(0); /* success */
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}
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/*
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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 sin6.
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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(in6p, nam)
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struct in6pcb *in6p;
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struct mbuf *nam;
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{
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struct in6_addr *in6a = NULL;
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struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
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struct in6_pktinfo *pi;
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struct ifnet *ifp = NULL; /* outgoing interface */
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int error = 0;
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struct in6_addr mapped;
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(void)&in6a; /* XXX fool gcc */
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if (nam->m_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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/* sanity check for mapped address case */
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if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
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if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
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in6p->in6p_laddr.s6_addr16[5] = htons(0xffff);
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if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
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return EINVAL;
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} else {
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if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
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return EINVAL;
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}
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|
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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 (in6p->in6p_outputopts &&
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(pi = in6p->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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}
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else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) &&
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in6p->in6p_moptions &&
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in6p->in6p_moptions->im6o_multicast_ifp) {
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sin6->sin6_addr.s6_addr16[1] =
|
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htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index);
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ifp = ifindex2ifnet[in6p->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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|
|
/* Source address selection. */
|
|
if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)
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&& in6p->in6p_laddr.s6_addr32[3] == 0) {
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struct sockaddr_in sin, *sinp;
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|
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bzero(&sin, sizeof(sin));
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sin.sin_len = sizeof(sin);
|
|
sin.sin_family = AF_INET;
|
|
bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr,
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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 {
|
|
/*
|
|
* 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(in6p->in6p_head,
|
|
&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);
|
|
in6p->in6p_laddr = *in6a;
|
|
}
|
|
in6p->in6p_faddr = sin6->sin6_addr;
|
|
in6p->in6p_fport = sin6->sin6_port;
|
|
/*
|
|
* xxx kazu flowlabel is necessary for connect?
|
|
* but if this line is missing, the garbage value remains.
|
|
*/
|
|
in6p->in6p_flowinfo = sin6->sin6_flowinfo;
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* 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(&satosin6(&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);
|
|
} 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 0
|
|
/*
|
|
* xxx The followings are necessary? (kazu)
|
|
* I don't think so.
|
|
* It's for SO_DONTROUTE option in IPv4.(jinmei)
|
|
*/
|
|
if (ia6 == 0) {
|
|
struct sockaddr_in6 sin6 = {sizeof(sin6), AF_INET6, 0};
|
|
|
|
sin6->sin6_addr = *dst;
|
|
|
|
ia6 = ifatoia6(ifa_ifwithdstaddr(sin6tosa(&sin6)));
|
|
if (ia6 == 0)
|
|
ia6 = ifatoia6(ifa_ifwithnet(sin6tosa(&sin6)));
|
|
if (ia6 == 0)
|
|
return(0);
|
|
return(&satosin6(&ia6->ia_addr)->sin6_addr);
|
|
}
|
|
#endif /* 0 */
|
|
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(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr));
|
|
in6p->in6p_fport = 0;
|
|
if (in6p->in6p_socket->so_state & SS_NOFDREF)
|
|
in6_pcbdetach(in6p);
|
|
}
|
|
|
|
void
|
|
in6_pcbdetach(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
struct socket *so = in6p->in6p_socket;
|
|
|
|
#ifdef 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);
|
|
in6p->in6p_next->in6p_prev = in6p->in6p_prev;
|
|
in6p->in6p_prev->in6p_next = in6p->in6p_next;
|
|
in6p->in6p_prev = NULL;
|
|
FREE(in6p, M_PCB);
|
|
}
|
|
|
|
void
|
|
in6_setsockaddr(in6p, nam)
|
|
struct in6pcb *in6p;
|
|
struct mbuf *nam;
|
|
{
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
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;
|
|
sin6->sin6_addr = in6p->in6p_laddr;
|
|
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;
|
|
}
|
|
|
|
void
|
|
in6_setpeeraddr(in6p, nam)
|
|
struct in6pcb *in6p;
|
|
struct mbuf *nam;
|
|
{
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
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;
|
|
sin6->sin6_addr = in6p->in6p_faddr;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify)
|
|
struct in6pcb *head;
|
|
struct sockaddr *dst;
|
|
u_int fport_arg, lport_arg;
|
|
struct in6_addr *laddr6;
|
|
int cmd;
|
|
void (*notify) __P((struct in6pcb *, int));
|
|
{
|
|
struct in6pcb *in6p, *nin6p;
|
|
struct in6_addr faddr6;
|
|
u_int16_t fport = fport_arg, lport = lport_arg;
|
|
int errno;
|
|
int nmatch = 0;
|
|
void (*notify2) __P((struct in6pcb *, int));
|
|
|
|
notify2 = NULL;
|
|
|
|
if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6)
|
|
return 0;
|
|
faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&faddr6))
|
|
return 0;
|
|
|
|
/*
|
|
* 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)laddr6, sizeof(*laddr6));
|
|
|
|
/*
|
|
* Keep the old notify function to store a soft error
|
|
* in each PCB.
|
|
*/
|
|
if (cmd == PRC_HOSTDEAD && notify != in6_rtchange)
|
|
notify2 = notify;
|
|
|
|
notify = in6_rtchange;
|
|
}
|
|
|
|
if (notify == NULL)
|
|
return 0;
|
|
|
|
errno = inet6ctlerrmap[cmd];
|
|
for (in6p = head->in6p_next; in6p != head; in6p = nin6p) {
|
|
nin6p = in6p->in6p_next;
|
|
|
|
if (notify == in6_rtchange) {
|
|
/*
|
|
* Since a non-connected PCB might have a cached route,
|
|
* we always call in6_rtchange without matching
|
|
* the PCB to the src/dst pair.
|
|
*
|
|
* XXX: we assume in6_rtchange does not free the PCB.
|
|
*/
|
|
if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr,
|
|
&faddr6))
|
|
in6_rtchange(in6p, errno);
|
|
|
|
if (notify2 == NULL)
|
|
continue;
|
|
|
|
notify = notify2;
|
|
}
|
|
|
|
/* at this point, we can assume that NOTIFY is not NULL. */
|
|
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) ||
|
|
in6p->in6p_socket == 0 ||
|
|
(lport && in6p->in6p_lport != lport) ||
|
|
(!IN6_IS_ADDR_UNSPECIFIED(laddr6) &&
|
|
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) ||
|
|
(fport && in6p->in6p_fport != fport))
|
|
continue;
|
|
|
|
(*notify)(in6p, errno);
|
|
nmatch++;
|
|
}
|
|
return nmatch;
|
|
}
|
|
|
|
void
|
|
in6_pcbpurgeif(head, ifp)
|
|
struct in6pcb *head;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct in6pcb *in6p, *nin6p;
|
|
|
|
for (in6p = head->in6p_next; in6p != head; in6p = nin6p) {
|
|
nin6p = in6p->in6p_next;
|
|
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 ((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_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(head, faddr6, fport_arg, laddr6, lport_arg, flags)
|
|
struct in6pcb *head;
|
|
struct in6_addr *faddr6, *laddr6;
|
|
u_int fport_arg, lport_arg;
|
|
int flags;
|
|
{
|
|
struct in6pcb *in6p, *match = 0;
|
|
int matchwild = 3, wildcard;
|
|
u_int16_t fport = fport_arg, lport = lport_arg;
|
|
|
|
for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) {
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
wildcard = 0;
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
|
|
wildcard++;
|
|
else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
|
|
continue;
|
|
}
|
|
#ifndef TCP6
|
|
else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)
|
|
&& in6p->in6p_laddr.s6_addr32[3] == 0) {
|
|
if (!IN6_IS_ADDR_V4MAPPED(laddr6))
|
|
continue;
|
|
if (laddr6->s6_addr32[3] == 0)
|
|
;
|
|
else
|
|
wildcard++;
|
|
}
|
|
#endif
|
|
else {
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
|
|
#if !defined(TCP6) && !defined(INET6_BINDV6ONLY)
|
|
if (in6p->in6p_flags & IN6P_BINDV6ONLY)
|
|
continue;
|
|
else
|
|
wildcard++;
|
|
#else
|
|
continue;
|
|
#endif
|
|
} else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
|
|
wildcard++;
|
|
}
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(faddr6))
|
|
wildcard++;
|
|
else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)
|
|
|| in6p->in6p_fport != fport)
|
|
continue;
|
|
}
|
|
#ifndef TCP6
|
|
else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)
|
|
&& in6p->in6p_faddr.s6_addr32[3] == 0) {
|
|
if (!IN6_IS_ADDR_V4MAPPED(faddr6))
|
|
continue;
|
|
if (faddr6->s6_addr32[3] == 0)
|
|
;
|
|
else
|
|
wildcard++;
|
|
}
|
|
#endif
|
|
else {
|
|
if (IN6_IS_ADDR_V4MAPPED(faddr6)) {
|
|
#if !defined(TCP6) && !defined(INET6_BINDV6ONLY)
|
|
if (in6p->in6p_flags & IN6P_BINDV6ONLY)
|
|
continue;
|
|
else
|
|
wildcard++;
|
|
#else
|
|
continue;
|
|
#endif
|
|
} else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6))
|
|
wildcard++;
|
|
}
|
|
|
|
if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0)
|
|
continue;
|
|
if (wildcard < matchwild) {
|
|
match = in6p;
|
|
matchwild = wildcard;
|
|
if (matchwild == 0)
|
|
break;
|
|
}
|
|
}
|
|
return(match);
|
|
}
|
|
|
|
#ifndef TCP6
|
|
struct rtentry *
|
|
in6_pcbrtentry(in6p)
|
|
struct in6pcb *in6p;
|
|
{
|
|
struct route_in6 *ro;
|
|
|
|
ro = &in6p->in6p_route;
|
|
|
|
if (ro->ro_rt == NULL) {
|
|
/*
|
|
* No route yet, so try to acquire one.
|
|
*/
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
bzero(&ro->ro_dst, sizeof(ro->ro_dst));
|
|
ro->ro_dst.sin6_family = AF_INET6;
|
|
ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6);
|
|
satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr;
|
|
rtalloc((struct route *)ro);
|
|
}
|
|
}
|
|
return (ro->ro_rt);
|
|
}
|
|
|
|
struct in6pcb *
|
|
in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith)
|
|
struct in6pcb *head;
|
|
struct in6_addr *faddr6, *laddr6;
|
|
u_int fport_arg, lport_arg;
|
|
int faith;
|
|
{
|
|
struct in6pcb *in6p;
|
|
u_int16_t fport = fport_arg, lport = lport_arg;
|
|
|
|
for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) {
|
|
#if defined(NFAITH) && NFAITH > 0
|
|
if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
|
|
continue;
|
|
#endif
|
|
/* 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;
|
|
return in6p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct in6pcb *
|
|
in6_pcblookup_bind(head, laddr6, lport_arg, faith)
|
|
struct in6pcb *head;
|
|
struct in6_addr *laddr6;
|
|
u_int lport_arg;
|
|
int faith;
|
|
{
|
|
struct in6pcb *in6p, *match;
|
|
u_int16_t lport = lport_arg;
|
|
|
|
match = NULL;
|
|
for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) {
|
|
/*
|
|
* find destination match. exact match is preferred
|
|
* against wildcard match.
|
|
*/
|
|
#if defined(NFAITH) && NFAITH > 0
|
|
if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0)
|
|
continue;
|
|
#endif
|
|
if (in6p->in6p_fport != 0)
|
|
continue;
|
|
if (in6p->in6p_lport != lport)
|
|
continue;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6)) {
|
|
#ifndef INET6_BINDV6ONLY
|
|
if (in6p->in6p_flags & IN6P_BINDV6ONLY)
|
|
continue;
|
|
else
|
|
match = in6p;
|
|
#else
|
|
continue;
|
|
#endif
|
|
} else
|
|
match = in6p;
|
|
}
|
|
else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) &&
|
|
in6p->in6p_laddr.s6_addr32[3] == 0) {
|
|
if (IN6_IS_ADDR_V4MAPPED(laddr6) &&
|
|
laddr6->s6_addr32[3] != 0)
|
|
match = in6p;
|
|
}
|
|
else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6))
|
|
return in6p;
|
|
}
|
|
return match;
|
|
}
|
|
#endif
|