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//==========================================================================
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//
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// src/sys/netinet6/ip6_output.c
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD,
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// FreeBSD or other sources, and are covered by the appropriate
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// copyright disclaimers included herein.
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//
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// Portions created by Red Hat are
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// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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/* $KAME: ip6_output.c,v 1.272 2001/12/26 01:03:28 jinmei 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, 1988, 1990, 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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| 61 |
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* notice, this list of conditions and the following disclaimer.
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| 62 |
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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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| 64 |
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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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| 75 |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 76 |
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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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* @(#)ip_output.c 8.3 (Berkeley) 1/21/94
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*/
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#include <sys/param.h>
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#include <sys/malloc.h>
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| 90 |
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#include <sys/mbuf.h>
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| 91 |
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#include <sys/errno.h>
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| 92 |
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#include <sys/protosw.h>
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| 93 |
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#include <sys/socket.h>
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| 94 |
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#include <sys/socketvar.h>
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| 95 |
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| 96 |
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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 <netinet6/in6_var.h>
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| 102 |
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#include <netinet/ip6.h>
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| 103 |
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#include <netinet/icmp6.h>
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| 104 |
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#include <netinet6/ip6_var.h>
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| 105 |
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#include <netinet/in_pcb.h>
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| 106 |
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#include <netinet6/nd6.h>
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| 107 |
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#include <netinet6/ip6protosw.h>
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| 108 |
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#include <netinet6/scope6_var.h>
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| 109 |
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| 110 |
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#ifdef IPSEC
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| 111 |
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#ifdef __OpenBSD__
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#include <netinet/ip_ah.h>
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#include <netinet/ip_esp.h>
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| 114 |
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#include <netinet/udp.h>
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| 115 |
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#include <netinet/tcp.h>
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| 116 |
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#include <net/pfkeyv2.h>
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| 118 |
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extern u_int8_t get_sa_require __P((struct inpcb *));
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| 120 |
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extern int ipsec_auth_default_level;
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| 121 |
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extern int ipsec_esp_trans_default_level;
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| 122 |
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extern int ipsec_esp_network_default_level;
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| 123 |
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extern int ipsec_ipcomp_default_level;
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| 124 |
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#else
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| 125 |
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#include <netinet6/ipsec.h>
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#include <netkey/key.h>
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#endif
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| 128 |
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#endif /* IPSEC */
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| 129 |
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| 130 |
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#if defined(IPV6FIREWALL) || (defined(__FreeBSD__) && __FreeBSD__ >= 4)
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#include <netinet6/ip6_fw.h>
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#endif
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| 134 |
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#ifdef MIP6
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#include <sys/syslog.h>
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#include <netinet6/mip6.h>
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| 137 |
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#endif /* MIP6 */
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| 138 |
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| 139 |
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struct ip6_exthdrs {
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| 140 |
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struct mbuf *ip6e_ip6;
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| 141 |
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struct mbuf *ip6e_hbh;
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| 142 |
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struct mbuf *ip6e_dest1;
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| 143 |
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struct mbuf *ip6e_rthdr;
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| 144 |
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struct mbuf *ip6e_haddr; /* for MIP6 */
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| 145 |
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struct mbuf *ip6e_dest2;
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| 146 |
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};
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| 147 |
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| 148 |
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static int ip6_pcbopt __P((int, u_char *, int, struct ip6_pktopts **, int));
|
| 149 |
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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| 150 |
|
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static int ip6_pcbopts __P((struct ip6_pktopts **, struct mbuf *,
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| 151 |
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struct socket *, struct sockopt *));
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| 152 |
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static int ip6_getpcbopt __P((struct ip6_pktopts *, int, struct sockopt *));
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| 153 |
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#else
|
| 154 |
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static int ip6_pcbopts __P((struct ip6_pktopts **, struct mbuf *,
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| 155 |
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struct socket *));
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| 156 |
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static int ip6_getpcbopt __P((struct ip6_pktopts *, int, struct mbuf **));
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| 157 |
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#endif
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| 158 |
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static int ip6_setpktoption __P((int, u_char *, int, struct ip6_pktopts *, int,
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| 159 |
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int, int));
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| 160 |
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static int ip6_setmoptions __P((int, struct ip6_moptions **, struct mbuf *));
|
| 161 |
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static int ip6_getmoptions __P((int, struct ip6_moptions *, struct mbuf **));
|
| 162 |
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static int ip6_copyexthdr __P((struct mbuf **, caddr_t, int));
|
| 163 |
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static int ip6_insertfraghdr __P((struct mbuf *, struct mbuf *, int,
|
| 164 |
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struct ip6_frag **));
|
| 165 |
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static int ip6_insert_jumboopt __P((struct ip6_exthdrs *, u_int32_t));
|
| 166 |
|
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static int ip6_splithdr __P((struct mbuf *, struct ip6_exthdrs *));
|
| 167 |
|
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#ifdef NEW_STRUCT_ROUTE
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| 168 |
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static int ip6_getpmtu __P((struct route *, struct route *, struct ifnet *,
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| 169 |
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struct in6_addr *, u_long *));
|
| 170 |
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#else
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| 171 |
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static int ip6_getpmtu __P((struct route *, struct route *, struct ifnet *,
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| 172 |
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struct in6_addr *, u_long *));
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| 173 |
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#endif
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| 174 |
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| 175 |
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#ifdef __bsdi__
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| 176 |
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#if _BSDI_VERSION < 199802
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| 177 |
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extern struct ifnet loif;
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| 178 |
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#else
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| 179 |
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extern struct ifnet *loifp;
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| 180 |
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#endif
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| 181 |
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#endif
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| 182 |
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#if defined(__NetBSD__)
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| 183 |
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extern struct ifnet loif[NLOOP];
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| 184 |
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#endif
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| 185 |
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| 186 |
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|
| 187 |
|
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/*
|
| 188 |
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* IP6 output. The packet in mbuf chain m contains a skeletal IP6
|
| 189 |
|
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* header (with pri, len, nxt, hlim, src, dst).
|
| 190 |
|
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* This function may modify ver and hlim only.
|
| 191 |
|
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* The mbuf chain containing the packet will be freed.
|
| 192 |
|
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* The mbuf opt, if present, will not be freed.
|
| 193 |
|
|
*
|
| 194 |
|
|
* type of "mtu": rt_rmx.rmx_mtu is u_long, ifnet.ifr_mtu is int, and
|
| 195 |
|
|
* nd_ifinfo.linkmtu is u_int32_t. so we use u_long to hold largest one,
|
| 196 |
|
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* which is rt_rmx.rmx_mtu.
|
| 197 |
|
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*/
|
| 198 |
|
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int
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| 199 |
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ip6_output(m0, opt, ro, flags, im6o, ifpp)
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| 200 |
|
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struct mbuf *m0;
|
| 201 |
|
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struct ip6_pktopts *opt;
|
| 202 |
|
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#ifdef NEW_STRUCT_ROUTE
|
| 203 |
|
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struct route *ro;
|
| 204 |
|
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#else
|
| 205 |
|
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struct route_in6 *ro;
|
| 206 |
|
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#endif
|
| 207 |
|
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int flags;
|
| 208 |
|
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struct ip6_moptions *im6o;
|
| 209 |
|
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struct ifnet **ifpp; /* XXX: just for statistics */
|
| 210 |
|
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{
|
| 211 |
|
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struct ip6_hdr *ip6, *mhip6;
|
| 212 |
|
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struct ifnet *ifp, *origifp;
|
| 213 |
|
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struct mbuf *m = m0;
|
| 214 |
|
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int hlen, tlen, len, off;
|
| 215 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 216 |
|
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struct route ip6route;
|
| 217 |
|
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#else
|
| 218 |
|
|
struct route_in6 ip6route;
|
| 219 |
|
|
#endif
|
| 220 |
|
|
struct rtentry *rt = NULL;
|
| 221 |
|
|
struct sockaddr_in6 *dst;
|
| 222 |
|
|
int error = 0;
|
| 223 |
|
|
struct in6_ifaddr *ia = NULL;
|
| 224 |
|
|
u_long mtu;
|
| 225 |
|
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u_int32_t optlen = 0, plen = 0, unfragpartlen = 0;
|
| 226 |
|
|
struct ip6_exthdrs exthdrs;
|
| 227 |
|
|
struct in6_addr finaldst;
|
| 228 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 229 |
|
|
struct route *ro_pmtu = NULL;
|
| 230 |
|
|
#else
|
| 231 |
|
|
struct route_in6 *ro_pmtu = NULL;
|
| 232 |
|
|
#endif
|
| 233 |
|
|
int hdrsplit = 0;
|
| 234 |
|
|
#ifdef __OpenBSD__
|
| 235 |
|
|
u_int8_t sproto = 0;
|
| 236 |
|
|
#else
|
| 237 |
|
|
int needipsec = 0;
|
| 238 |
|
|
#endif
|
| 239 |
|
|
#if defined(__NetBSD__) && defined(PFIL_HOOKS)
|
| 240 |
|
|
struct packet_filter_hook *pfh;
|
| 241 |
|
|
struct mbuf *m1;
|
| 242 |
|
|
int rv;
|
| 243 |
|
|
#endif /* PFIL_HOOKS */
|
| 244 |
|
|
#if defined(__bsdi__) && _BSDI_VERSION < 199802
|
| 245 |
|
|
struct ifnet *loifp = &loif;
|
| 246 |
|
|
#endif
|
| 247 |
|
|
#ifdef MIP6
|
| 248 |
|
|
struct mip6_pktopts mip6opt;
|
| 249 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 250 |
|
|
struct route mip6_ip6route;
|
| 251 |
|
|
#else
|
| 252 |
|
|
struct route_in6 mip6_ip6route;
|
| 253 |
|
|
#endif
|
| 254 |
|
|
#endif /* MIP6 */
|
| 255 |
|
|
#ifdef IPSEC
|
| 256 |
|
|
#ifdef __OpenBSD__
|
| 257 |
|
|
struct m_tag *mtag;
|
| 258 |
|
|
union sockaddr_union sdst;
|
| 259 |
|
|
struct tdb_ident *tdbi;
|
| 260 |
|
|
u_int32_t sspi;
|
| 261 |
|
|
struct inpcb *inp;
|
| 262 |
|
|
struct tdb *tdb;
|
| 263 |
|
|
int s;
|
| 264 |
|
|
|
| 265 |
|
|
inp = NULL; /* XXX */
|
| 266 |
|
|
if (inp && (inp->inp_flags & INP_IPV6) == 0)
|
| 267 |
|
|
panic("ip6_output: IPv4 pcb is passed");
|
| 268 |
|
|
#else
|
| 269 |
|
|
int needipsectun = 0;
|
| 270 |
|
|
struct socket *so;
|
| 271 |
|
|
struct secpolicy *sp = NULL;
|
| 272 |
|
|
|
| 273 |
|
|
/* for AH processing. stupid to have "socket" variable in IP layer... */
|
| 274 |
|
|
so = ipsec_getsocket(m);
|
| 275 |
|
|
(void)ipsec_setsocket(m, NULL);
|
| 276 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 277 |
|
|
#endif
|
| 278 |
|
|
#endif /* IPSEC */
|
| 279 |
|
|
|
| 280 |
|
|
#define MAKE_EXTHDR(hp, mp) \
|
| 281 |
|
|
do { \
|
| 282 |
|
|
if (hp) { \
|
| 283 |
|
|
struct ip6_ext *eh = (struct ip6_ext *)(hp); \
|
| 284 |
|
|
error = ip6_copyexthdr((mp), (caddr_t)(hp), \
|
| 285 |
|
|
((eh)->ip6e_len + 1) << 3); \
|
| 286 |
|
|
if (error) \
|
| 287 |
|
|
goto freehdrs; \
|
| 288 |
|
|
} \
|
| 289 |
|
|
} while (0)
|
| 290 |
|
|
|
| 291 |
|
|
bzero(&exthdrs, sizeof(exthdrs));
|
| 292 |
|
|
|
| 293 |
|
|
if (opt) {
|
| 294 |
|
|
/* Hop-by-Hop options header */
|
| 295 |
|
|
MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh);
|
| 296 |
|
|
/* Destination options header(1st part) */
|
| 297 |
|
|
if (opt->ip6po_rthdr) {
|
| 298 |
|
|
/*
|
| 299 |
|
|
* Destination options header(1st part)
|
| 300 |
|
|
* This only makes sence with a routing header.
|
| 301 |
|
|
* See Section 9.2 of
|
| 302 |
|
|
* draft-ietf-ipngwg-rfc2292bis-02.txt.
|
| 303 |
|
|
* Disabling this part just for MIP6 convenience is
|
| 304 |
|
|
* a bad idea. We need to think carefully about a
|
| 305 |
|
|
* way to make the advanced API coexist with MIP6
|
| 306 |
|
|
* options, which might automatically be inserted in
|
| 307 |
|
|
* the kernel.
|
| 308 |
|
|
*/
|
| 309 |
|
|
MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1);
|
| 310 |
|
|
}
|
| 311 |
|
|
/* Routing header */
|
| 312 |
|
|
MAKE_EXTHDR(opt->ip6po_rthdr, &exthdrs.ip6e_rthdr);
|
| 313 |
|
|
/* Destination options header(2nd part) */
|
| 314 |
|
|
MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2);
|
| 315 |
|
|
}
|
| 316 |
|
|
#ifdef MIP6
|
| 317 |
|
|
bzero((caddr_t)&mip6opt, sizeof(mip6opt));
|
| 318 |
|
|
if ((flags & IPV6_FORWARDING) == 0) {
|
| 319 |
|
|
/*
|
| 320 |
|
|
* XXX: reconsider the following routine.
|
| 321 |
|
|
*/
|
| 322 |
|
|
/*
|
| 323 |
|
|
* MIP6 extention headers handling.
|
| 324 |
|
|
* insert HA, BU, BA, BR options if necessary.
|
| 325 |
|
|
*/
|
| 326 |
|
|
if (mip6_exthdr_create(m, opt, &mip6opt))
|
| 327 |
|
|
goto freehdrs;
|
| 328 |
|
|
|
| 329 |
|
|
if (((opt != NULL) && (opt->ip6po_rthdr != NULL))
|
| 330 |
|
|
|| (mip6opt.mip6po_rthdr != NULL)) {
|
| 331 |
|
|
m_freem(exthdrs.ip6e_rthdr);
|
| 332 |
|
|
if (mip6opt.mip6po_rthdr != NULL) {
|
| 333 |
|
|
/*
|
| 334 |
|
|
* there is no rthdr specified in the
|
| 335 |
|
|
* ip6_pktopts. but mip6 create a
|
| 336 |
|
|
* rthdr for the router optimization
|
| 337 |
|
|
* purpose.
|
| 338 |
|
|
*/
|
| 339 |
|
|
MAKE_EXTHDR(mip6opt.mip6po_rthdr,
|
| 340 |
|
|
&exthdrs.ip6e_rthdr);
|
| 341 |
|
|
} else {
|
| 342 |
|
|
/*
|
| 343 |
|
|
* there is a rthdr specified in the
|
| 344 |
|
|
* ip6_pktopts. if mip6 require the
|
| 345 |
|
|
* route optimization, the rthdr for
|
| 346 |
|
|
* that purpose is already included in
|
| 347 |
|
|
* the ip6po_rthdr in the
|
| 348 |
|
|
* mip6_destopt_create().
|
| 349 |
|
|
*/
|
| 350 |
|
|
MAKE_EXTHDR(opt->ip6po_rthdr,
|
| 351 |
|
|
&exthdrs.ip6e_rthdr);
|
| 352 |
|
|
}
|
| 353 |
|
|
/*
|
| 354 |
|
|
* if a routing header exists dest1 must be
|
| 355 |
|
|
* inserted if it exists.
|
| 356 |
|
|
*/
|
| 357 |
|
|
if ((opt != NULL) && (opt->ip6po_dest1)) {
|
| 358 |
|
|
m_freem(exthdrs.ip6e_dest1);
|
| 359 |
|
|
MAKE_EXTHDR(opt->ip6po_dest1,
|
| 360 |
|
|
&exthdrs.ip6e_dest1);
|
| 361 |
|
|
}
|
| 362 |
|
|
}
|
| 363 |
|
|
MAKE_EXTHDR(mip6opt.mip6po_haddr, &exthdrs.ip6e_haddr);
|
| 364 |
|
|
if (mip6opt.mip6po_dest2) {
|
| 365 |
|
|
m_freem(exthdrs.ip6e_dest2);
|
| 366 |
|
|
MAKE_EXTHDR(mip6opt.mip6po_dest2, &exthdrs.ip6e_dest2);
|
| 367 |
|
|
}
|
| 368 |
|
|
} else {
|
| 369 |
|
|
/*
|
| 370 |
|
|
* this is the forwarding packet. do not modify any
|
| 371 |
|
|
* extension headers.
|
| 372 |
|
|
*/
|
| 373 |
|
|
}
|
| 374 |
|
|
#endif /* MIP6 */
|
| 375 |
|
|
|
| 376 |
|
|
#ifdef IPSEC
|
| 377 |
|
|
#ifdef __OpenBSD__
|
| 378 |
|
|
/*
|
| 379 |
|
|
* splnet is chosen over spltdb because we are not allowed to
|
| 380 |
|
|
* lower the level, and udp6_output calls us in splnet(). XXX check
|
| 381 |
|
|
*/
|
| 382 |
|
|
s = splnet();
|
| 383 |
|
|
|
| 384 |
|
|
/*
|
| 385 |
|
|
* Check if there was an outgoing SA bound to the flow
|
| 386 |
|
|
* from a transport protocol.
|
| 387 |
|
|
*/
|
| 388 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 389 |
|
|
|
| 390 |
|
|
/* Do we have any pending SAs to apply ? */
|
| 391 |
|
|
mtag = m_tag_find(m, PACKET_TAG_IPSEC_PENDING_TDB, NULL);
|
| 392 |
|
|
if (mtag != NULL) {
|
| 393 |
|
|
#ifdef DIAGNOSTIC
|
| 394 |
|
|
if (mtag->m_tag_len != sizeof (struct tdb_ident))
|
| 395 |
|
|
panic("ip6_output: tag of length %d (should be %d",
|
| 396 |
|
|
mtag->m_tag_len, sizeof (struct tdb_ident));
|
| 397 |
|
|
#endif
|
| 398 |
|
|
tdbi = (struct tdb_ident *)(mtag + 1);
|
| 399 |
|
|
tdb = gettdb(tdbi->spi, &tdbi->dst, tdbi->proto);
|
| 400 |
|
|
if (tdb == NULL)
|
| 401 |
|
|
error = -EINVAL;
|
| 402 |
|
|
m_tag_delete(m, mtag);
|
| 403 |
|
|
}
|
| 404 |
|
|
else
|
| 405 |
|
|
tdb = ipsp_spd_lookup(m, AF_INET6, sizeof(struct ip6_hdr),
|
| 406 |
|
|
&error, IPSP_DIRECTION_OUT, NULL, inp);
|
| 407 |
|
|
|
| 408 |
|
|
if (tdb == NULL) {
|
| 409 |
|
|
splx(s);
|
| 410 |
|
|
|
| 411 |
|
|
if (error == 0) {
|
| 412 |
|
|
/*
|
| 413 |
|
|
* No IPsec processing required, we'll just send the
|
| 414 |
|
|
* packet out.
|
| 415 |
|
|
*/
|
| 416 |
|
|
sproto = 0;
|
| 417 |
|
|
|
| 418 |
|
|
/* Fall through to routing/multicast handling */
|
| 419 |
|
|
} else {
|
| 420 |
|
|
/*
|
| 421 |
|
|
* -EINVAL is used to indicate that the packet should
|
| 422 |
|
|
* be silently dropped, typically because we've asked
|
| 423 |
|
|
* key management for an SA.
|
| 424 |
|
|
*/
|
| 425 |
|
|
if (error == -EINVAL) /* Should silently drop packet */
|
| 426 |
|
|
error = 0;
|
| 427 |
|
|
|
| 428 |
|
|
goto freehdrs;
|
| 429 |
|
|
}
|
| 430 |
|
|
} else {
|
| 431 |
|
|
/* Loop detection */
|
| 432 |
|
|
for (mtag = m_tag_first(m); mtag != NULL;
|
| 433 |
|
|
mtag = m_tag_next(m, mtag)) {
|
| 434 |
|
|
if (mtag->m_tag_id != PACKET_TAG_IPSEC_OUT_DONE &&
|
| 435 |
|
|
mtag->m_tag_id !=
|
| 436 |
|
|
PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED)
|
| 437 |
|
|
continue;
|
| 438 |
|
|
tdbi = (struct tdb_ident *)(mtag + 1);
|
| 439 |
|
|
if (tdbi->spi == tdb->tdb_spi &&
|
| 440 |
|
|
tdbi->proto == tdb->tdb_sproto &&
|
| 441 |
|
|
!bcmp(&tdbi->dst, &tdb->tdb_dst,
|
| 442 |
|
|
sizeof(union sockaddr_union))) {
|
| 443 |
|
|
splx(s);
|
| 444 |
|
|
sproto = 0; /* mark as no-IPsec-needed */
|
| 445 |
|
|
goto done_spd;
|
| 446 |
|
|
}
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
/* We need to do IPsec */
|
| 450 |
|
|
bcopy(&tdb->tdb_dst, &sdst, sizeof(sdst));
|
| 451 |
|
|
sspi = tdb->tdb_spi;
|
| 452 |
|
|
sproto = tdb->tdb_sproto;
|
| 453 |
|
|
splx(s);
|
| 454 |
|
|
|
| 455 |
|
|
#if 1 /* XXX */
|
| 456 |
|
|
/* if we have any extension header, we cannot perform IPsec */
|
| 457 |
|
|
if (exthdrs.ip6e_hbh || exthdrs.ip6e_dest1 ||
|
| 458 |
|
|
#ifdef MIP6
|
| 459 |
|
|
exthdrs.ip6e_haddr ||
|
| 460 |
|
|
#endif /* MIP6 */
|
| 461 |
|
|
exthdrs.ip6e_rthdr || exthdrs.ip6e_dest2) {
|
| 462 |
|
|
error = EHOSTUNREACH;
|
| 463 |
|
|
goto freehdrs;
|
| 464 |
|
|
}
|
| 465 |
|
|
#endif
|
| 466 |
|
|
}
|
| 467 |
|
|
|
| 468 |
|
|
/* Fall through to the routing/multicast handling code */
|
| 469 |
|
|
done_spd:
|
| 470 |
|
|
#else
|
| 471 |
|
|
/* get a security policy for this packet */
|
| 472 |
|
|
if (so == NULL)
|
| 473 |
|
|
sp = ipsec6_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, 0, &error);
|
| 474 |
|
|
else
|
| 475 |
|
|
sp = ipsec6_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
|
| 476 |
|
|
|
| 477 |
|
|
if (sp == NULL) {
|
| 478 |
|
|
ipsec6stat.out_inval++;
|
| 479 |
|
|
goto freehdrs;
|
| 480 |
|
|
}
|
| 481 |
|
|
|
| 482 |
|
|
error = 0;
|
| 483 |
|
|
|
| 484 |
|
|
/* check policy */
|
| 485 |
|
|
switch (sp->policy) {
|
| 486 |
|
|
case IPSEC_POLICY_DISCARD:
|
| 487 |
|
|
/*
|
| 488 |
|
|
* This packet is just discarded.
|
| 489 |
|
|
*/
|
| 490 |
|
|
ipsec6stat.out_polvio++;
|
| 491 |
|
|
goto freehdrs;
|
| 492 |
|
|
|
| 493 |
|
|
case IPSEC_POLICY_BYPASS:
|
| 494 |
|
|
case IPSEC_POLICY_NONE:
|
| 495 |
|
|
/* no need to do IPsec. */
|
| 496 |
|
|
needipsec = 0;
|
| 497 |
|
|
break;
|
| 498 |
|
|
|
| 499 |
|
|
case IPSEC_POLICY_IPSEC:
|
| 500 |
|
|
if (sp->req == NULL) {
|
| 501 |
|
|
/* acquire a policy */
|
| 502 |
|
|
error = key_spdacquire(sp);
|
| 503 |
|
|
goto freehdrs;
|
| 504 |
|
|
}
|
| 505 |
|
|
needipsec = 1;
|
| 506 |
|
|
break;
|
| 507 |
|
|
|
| 508 |
|
|
case IPSEC_POLICY_ENTRUST:
|
| 509 |
|
|
default:
|
| 510 |
|
|
printf("ip6_output: Invalid policy found. %d\n", sp->policy);
|
| 511 |
|
|
}
|
| 512 |
|
|
#endif /* OpenBSD */
|
| 513 |
|
|
#endif /* IPSEC */
|
| 514 |
|
|
|
| 515 |
|
|
/*
|
| 516 |
|
|
* Calculate the total length of the extension header chain.
|
| 517 |
|
|
* Keep the length of the unfragmentable part for fragmentation.
|
| 518 |
|
|
*/
|
| 519 |
|
|
optlen = 0;
|
| 520 |
|
|
if (exthdrs.ip6e_hbh) optlen += exthdrs.ip6e_hbh->m_len;
|
| 521 |
|
|
if (exthdrs.ip6e_dest1) optlen += exthdrs.ip6e_dest1->m_len;
|
| 522 |
|
|
if (exthdrs.ip6e_rthdr) optlen += exthdrs.ip6e_rthdr->m_len;
|
| 523 |
|
|
#ifdef MIP6
|
| 524 |
|
|
if (exthdrs.ip6e_haddr) optlen += exthdrs.ip6e_haddr->m_len;
|
| 525 |
|
|
#endif /* MIP6 */
|
| 526 |
|
|
unfragpartlen = optlen + sizeof(struct ip6_hdr);
|
| 527 |
|
|
/* NOTE: we don't add AH/ESP length here. do that later. */
|
| 528 |
|
|
if (exthdrs.ip6e_dest2) optlen += exthdrs.ip6e_dest2->m_len;
|
| 529 |
|
|
|
| 530 |
|
|
/*
|
| 531 |
|
|
* If we need IPsec, or there is at least one extension header,
|
| 532 |
|
|
* separate IP6 header from the payload.
|
| 533 |
|
|
*/
|
| 534 |
|
|
#ifdef __OpenBSD__
|
| 535 |
|
|
if ((sproto || optlen) && !hdrsplit)
|
| 536 |
|
|
#else
|
| 537 |
|
|
if ((needipsec || optlen) && !hdrsplit)
|
| 538 |
|
|
#endif
|
| 539 |
|
|
{
|
| 540 |
|
|
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
|
| 541 |
|
|
m = NULL;
|
| 542 |
|
|
goto freehdrs;
|
| 543 |
|
|
}
|
| 544 |
|
|
m = exthdrs.ip6e_ip6;
|
| 545 |
|
|
hdrsplit++;
|
| 546 |
|
|
}
|
| 547 |
|
|
|
| 548 |
|
|
/* adjust pointer */
|
| 549 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 550 |
|
|
|
| 551 |
|
|
/* adjust mbuf packet header length */
|
| 552 |
|
|
m->m_pkthdr.len += optlen;
|
| 553 |
|
|
plen = m->m_pkthdr.len - sizeof(*ip6);
|
| 554 |
|
|
|
| 555 |
|
|
/* If this is a jumbo payload, insert a jumbo payload option. */
|
| 556 |
|
|
if (plen > IPV6_MAXPACKET) {
|
| 557 |
|
|
if (!hdrsplit) {
|
| 558 |
|
|
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
|
| 559 |
|
|
m = NULL;
|
| 560 |
|
|
goto freehdrs;
|
| 561 |
|
|
}
|
| 562 |
|
|
m = exthdrs.ip6e_ip6;
|
| 563 |
|
|
hdrsplit++;
|
| 564 |
|
|
}
|
| 565 |
|
|
/* adjust pointer */
|
| 566 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 567 |
|
|
if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0)
|
| 568 |
|
|
goto freehdrs;
|
| 569 |
|
|
ip6->ip6_plen = 0;
|
| 570 |
|
|
} else
|
| 571 |
|
|
ip6->ip6_plen = htons(plen);
|
| 572 |
|
|
|
| 573 |
|
|
/*
|
| 574 |
|
|
* Concatenate headers and fill in next header fields.
|
| 575 |
|
|
* Here we have, on "m"
|
| 576 |
|
|
* IPv6 payload
|
| 577 |
|
|
* and we insert headers accordingly. Finally, we should be getting:
|
| 578 |
|
|
* IPv6 hbh dest1 rthdr ah* [esp* dest2 payload]
|
| 579 |
|
|
*
|
| 580 |
|
|
* during the header composing process, "m" points to IPv6 header.
|
| 581 |
|
|
* "mprev" points to an extension header prior to esp.
|
| 582 |
|
|
*/
|
| 583 |
|
|
{
|
| 584 |
|
|
u_char *nexthdrp = &ip6->ip6_nxt;
|
| 585 |
|
|
struct mbuf *mprev = m;
|
| 586 |
|
|
|
| 587 |
|
|
/*
|
| 588 |
|
|
* we treat dest2 specially. this makes IPsec processing
|
| 589 |
|
|
* much easier. the goal here is to make mprev point the
|
| 590 |
|
|
* mbuf prior to dest2.
|
| 591 |
|
|
*
|
| 592 |
|
|
* result: IPv6 dest2 payload
|
| 593 |
|
|
* m and mprev will point to IPv6 header.
|
| 594 |
|
|
*/
|
| 595 |
|
|
if (exthdrs.ip6e_dest2) {
|
| 596 |
|
|
if (!hdrsplit)
|
| 597 |
|
|
panic("assumption failed: hdr not split");
|
| 598 |
|
|
exthdrs.ip6e_dest2->m_next = m->m_next;
|
| 599 |
|
|
m->m_next = exthdrs.ip6e_dest2;
|
| 600 |
|
|
*mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt;
|
| 601 |
|
|
ip6->ip6_nxt = IPPROTO_DSTOPTS;
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
#define MAKE_CHAIN(m, mp, p, i)\
|
| 605 |
|
|
do {\
|
| 606 |
|
|
if (m) {\
|
| 607 |
|
|
if (!hdrsplit) \
|
| 608 |
|
|
panic("assumption failed: hdr not split"); \
|
| 609 |
|
|
*mtod((m), u_char *) = *(p);\
|
| 610 |
|
|
*(p) = (i);\
|
| 611 |
|
|
p = mtod((m), u_char *);\
|
| 612 |
|
|
(m)->m_next = (mp)->m_next;\
|
| 613 |
|
|
(mp)->m_next = (m);\
|
| 614 |
|
|
(mp) = (m);\
|
| 615 |
|
|
}\
|
| 616 |
|
|
} while (0)
|
| 617 |
|
|
/*
|
| 618 |
|
|
* result: IPv6 hbh dest1 rthdr dest2 payload
|
| 619 |
|
|
* m will point to IPv6 header. mprev will point to the
|
| 620 |
|
|
* extension header prior to dest2 (rthdr in the above case).
|
| 621 |
|
|
*/
|
| 622 |
|
|
MAKE_CHAIN(exthdrs.ip6e_hbh, mprev,
|
| 623 |
|
|
nexthdrp, IPPROTO_HOPOPTS);
|
| 624 |
|
|
MAKE_CHAIN(exthdrs.ip6e_dest1, mprev,
|
| 625 |
|
|
nexthdrp, IPPROTO_DSTOPTS);
|
| 626 |
|
|
MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev,
|
| 627 |
|
|
nexthdrp, IPPROTO_ROUTING);
|
| 628 |
|
|
#ifdef MIP6
|
| 629 |
|
|
/*
|
| 630 |
|
|
* XXX
|
| 631 |
|
|
* MIP6 homeaddress destination option must reside
|
| 632 |
|
|
* after rthdr and before ah/esp/frag hdr.
|
| 633 |
|
|
* this order is not recommended in the ipv6 spec of course.
|
| 634 |
|
|
* result: IPv6 hbh dest1 rthdr ha dest2 payload.
|
| 635 |
|
|
*/
|
| 636 |
|
|
MAKE_CHAIN(exthdrs.ip6e_haddr, mprev,
|
| 637 |
|
|
nexthdrp, IPPROTO_DSTOPTS);
|
| 638 |
|
|
#endif /* MIP6 */
|
| 639 |
|
|
|
| 640 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 641 |
|
|
if (!needipsec)
|
| 642 |
|
|
goto skip_ipsec2;
|
| 643 |
|
|
|
| 644 |
|
|
/*
|
| 645 |
|
|
* pointers after IPsec headers are not valid any more.
|
| 646 |
|
|
* other pointers need a great care too.
|
| 647 |
|
|
* (IPsec routines should not mangle mbufs prior to AH/ESP)
|
| 648 |
|
|
*/
|
| 649 |
|
|
exthdrs.ip6e_dest2 = NULL;
|
| 650 |
|
|
|
| 651 |
|
|
{
|
| 652 |
|
|
struct ip6_rthdr *rh = NULL;
|
| 653 |
|
|
int segleft_org = 0;
|
| 654 |
|
|
struct ipsec_output_state state;
|
| 655 |
|
|
|
| 656 |
|
|
if (exthdrs.ip6e_rthdr) {
|
| 657 |
|
|
rh = mtod(exthdrs.ip6e_rthdr, struct ip6_rthdr *);
|
| 658 |
|
|
segleft_org = rh->ip6r_segleft;
|
| 659 |
|
|
rh->ip6r_segleft = 0;
|
| 660 |
|
|
}
|
| 661 |
|
|
|
| 662 |
|
|
bzero(&state, sizeof(state));
|
| 663 |
|
|
state.m = m;
|
| 664 |
|
|
error = ipsec6_output_trans(&state, nexthdrp, mprev, sp, flags,
|
| 665 |
|
|
&needipsectun);
|
| 666 |
|
|
m = state.m;
|
| 667 |
|
|
if (error) {
|
| 668 |
|
|
/* mbuf is already reclaimed in ipsec6_output_trans. */
|
| 669 |
|
|
m = NULL;
|
| 670 |
|
|
switch (error) {
|
| 671 |
|
|
case EHOSTUNREACH:
|
| 672 |
|
|
case ENETUNREACH:
|
| 673 |
|
|
case EMSGSIZE:
|
| 674 |
|
|
case ENOBUFS:
|
| 675 |
|
|
case ENOMEM:
|
| 676 |
|
|
break;
|
| 677 |
|
|
default:
|
| 678 |
|
|
printf("ip6_output (ipsec): error code %d\n", error);
|
| 679 |
|
|
/* fall through */
|
| 680 |
|
|
case ENOENT:
|
| 681 |
|
|
/* don't show these error codes to the user */
|
| 682 |
|
|
error = 0;
|
| 683 |
|
|
break;
|
| 684 |
|
|
}
|
| 685 |
|
|
goto bad;
|
| 686 |
|
|
}
|
| 687 |
|
|
if (exthdrs.ip6e_rthdr) {
|
| 688 |
|
|
/* ah6_output doesn't modify mbuf chain */
|
| 689 |
|
|
rh->ip6r_segleft = segleft_org;
|
| 690 |
|
|
}
|
| 691 |
|
|
}
|
| 692 |
|
|
skip_ipsec2:;
|
| 693 |
|
|
#endif
|
| 694 |
|
|
}
|
| 695 |
|
|
|
| 696 |
|
|
#ifdef MIP6
|
| 697 |
|
|
if ((flags & IPV6_FORWARDING) == 0) {
|
| 698 |
|
|
/*
|
| 699 |
|
|
* After the IPsec processing the IPv6 header source
|
| 700 |
|
|
* address (this is the homeaddress of this node) and
|
| 701 |
|
|
* the address currently stored in the Home Address
|
| 702 |
|
|
* destination option (this is the coa of this node)
|
| 703 |
|
|
* must be swapped.
|
| 704 |
|
|
*/
|
| 705 |
|
|
if ((error = mip6_addr_exchange(m, exthdrs.ip6e_haddr)) != 0) {
|
| 706 |
|
|
mip6log((LOG_ERR,
|
| 707 |
|
|
"%s:%d: "
|
| 708 |
|
|
"addr exchange between haddr and "
|
| 709 |
|
|
"coa failed.\n",
|
| 710 |
|
|
__FILE__, __LINE__));
|
| 711 |
|
|
goto bad;
|
| 712 |
|
|
}
|
| 713 |
|
|
} else {
|
| 714 |
|
|
/*
|
| 715 |
|
|
* this is the forwarding packet. The typical (and
|
| 716 |
|
|
* only ?) case is multicast packet forwarding. The
|
| 717 |
|
|
* swapping has been already done before (if
|
| 718 |
|
|
* necessary). we must not touch any extension
|
| 719 |
|
|
* headers at all.
|
| 720 |
|
|
*/
|
| 721 |
|
|
}
|
| 722 |
|
|
#endif /* MIP6 */
|
| 723 |
|
|
|
| 724 |
|
|
/*
|
| 725 |
|
|
* If there is a routing header, replace destination address field
|
| 726 |
|
|
* with the first hop of the routing header.
|
| 727 |
|
|
*/
|
| 728 |
|
|
if (exthdrs.ip6e_rthdr) {
|
| 729 |
|
|
struct ip6_rthdr *rh =
|
| 730 |
|
|
(struct ip6_rthdr *)(mtod(exthdrs.ip6e_rthdr,
|
| 731 |
|
|
struct ip6_rthdr *));
|
| 732 |
|
|
struct ip6_rthdr0 *rh0;
|
| 733 |
|
|
struct in6_addr *addr;
|
| 734 |
|
|
|
| 735 |
|
|
finaldst = ip6->ip6_dst;
|
| 736 |
|
|
switch (rh->ip6r_type) {
|
| 737 |
|
|
case IPV6_RTHDR_TYPE_0:
|
| 738 |
|
|
rh0 = (struct ip6_rthdr0 *)rh;
|
| 739 |
|
|
addr = (struct in6_addr *)(rh0 + 1);
|
| 740 |
|
|
|
| 741 |
|
|
ip6->ip6_dst = *addr;
|
| 742 |
|
|
bcopy((caddr_t)(addr + 1), (caddr_t)addr,
|
| 743 |
|
|
sizeof(struct in6_addr) * (rh0->ip6r0_segleft - 1)
|
| 744 |
|
|
);
|
| 745 |
|
|
*(addr + rh0->ip6r0_segleft - 1) = finaldst;
|
| 746 |
|
|
break;
|
| 747 |
|
|
default: /* is it possible? */
|
| 748 |
|
|
error = EINVAL;
|
| 749 |
|
|
goto bad;
|
| 750 |
|
|
}
|
| 751 |
|
|
}
|
| 752 |
|
|
|
| 753 |
|
|
/* Source address validation */
|
| 754 |
|
|
if (!(flags & IPV6_UNSPECSRC) &&
|
| 755 |
|
|
IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
|
| 756 |
|
|
/*
|
| 757 |
|
|
* XXX: we can probably assume validation in the caller, but
|
| 758 |
|
|
* we explicitly check the address here for safety.
|
| 759 |
|
|
*/
|
| 760 |
|
|
error = EOPNOTSUPP;
|
| 761 |
|
|
ip6stat.ip6s_badscope++;
|
| 762 |
|
|
goto bad;
|
| 763 |
|
|
}
|
| 764 |
|
|
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)) {
|
| 765 |
|
|
error = EOPNOTSUPP;
|
| 766 |
|
|
ip6stat.ip6s_badscope++;
|
| 767 |
|
|
goto bad;
|
| 768 |
|
|
}
|
| 769 |
|
|
|
| 770 |
|
|
ip6stat.ip6s_localout++;
|
| 771 |
|
|
|
| 772 |
|
|
/*
|
| 773 |
|
|
* Route packet.
|
| 774 |
|
|
*/
|
| 775 |
|
|
if (ro == 0) {
|
| 776 |
|
|
ro = &ip6route;
|
| 777 |
|
|
bzero((caddr_t)ro, sizeof(*ro));
|
| 778 |
|
|
}
|
| 779 |
|
|
ro_pmtu = ro;
|
| 780 |
|
|
if (opt && opt->ip6po_rthdr)
|
| 781 |
|
|
ro = &opt->ip6po_route;
|
| 782 |
|
|
#ifdef MIP6
|
| 783 |
|
|
else if (exthdrs.ip6e_rthdr) {
|
| 784 |
|
|
struct sockaddr_in6 *firsthop;
|
| 785 |
|
|
struct ip6_hdr *ip6
|
| 786 |
|
|
= mtod(m, struct ip6_hdr *); /* needed ? */;
|
| 787 |
|
|
|
| 788 |
|
|
ro = &mip6_ip6route;
|
| 789 |
|
|
bzero((caddr_t)ro, sizeof(*ro));
|
| 790 |
|
|
firsthop = (struct sockaddr_in6 *)&ro->ro_dst;
|
| 791 |
|
|
bzero(firsthop, sizeof(*firsthop));
|
| 792 |
|
|
firsthop->sin6_family = AF_INET6;
|
| 793 |
|
|
firsthop->sin6_len = sizeof(struct sockaddr_in6);
|
| 794 |
|
|
firsthop->sin6_addr = ip6->ip6_dst;
|
| 795 |
|
|
}
|
| 796 |
|
|
#endif /* MIP6 */
|
| 797 |
|
|
dst = (struct sockaddr_in6 *)&ro->ro_dst;
|
| 798 |
|
|
|
| 799 |
|
|
#ifdef IPSEC
|
| 800 |
|
|
#ifdef __OpenBSD__
|
| 801 |
|
|
/*
|
| 802 |
|
|
* Check if the packet needs encapsulation.
|
| 803 |
|
|
* ipsp_process_packet will never come back to here.
|
| 804 |
|
|
*/
|
| 805 |
|
|
if (sproto != 0) {
|
| 806 |
|
|
s = splnet();
|
| 807 |
|
|
|
| 808 |
|
|
/* fill in IPv6 header which would be filled later */
|
| 809 |
|
|
if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
| 810 |
|
|
if (opt && opt->ip6po_hlim != -1)
|
| 811 |
|
|
ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
|
| 812 |
|
|
} else {
|
| 813 |
|
|
if (im6o != NULL)
|
| 814 |
|
|
ip6->ip6_hlim = im6o->im6o_multicast_hlim;
|
| 815 |
|
|
else
|
| 816 |
|
|
ip6->ip6_hlim = ip6_defmcasthlim;
|
| 817 |
|
|
if (opt && opt->ip6po_hlim != -1)
|
| 818 |
|
|
ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
|
| 819 |
|
|
|
| 820 |
|
|
/*
|
| 821 |
|
|
* XXX what should we do if ip6_hlim == 0 and the packet
|
| 822 |
|
|
* gets tunnelled?
|
| 823 |
|
|
*/
|
| 824 |
|
|
}
|
| 825 |
|
|
|
| 826 |
|
|
tdb = gettdb(sspi, &sdst, sproto);
|
| 827 |
|
|
if (tdb == NULL) {
|
| 828 |
|
|
splx(s);
|
| 829 |
|
|
error = EHOSTUNREACH;
|
| 830 |
|
|
m_freem(m);
|
| 831 |
|
|
goto done;
|
| 832 |
|
|
}
|
| 833 |
|
|
|
| 834 |
|
|
/* Latch to PCB */
|
| 835 |
|
|
if (inp)
|
| 836 |
|
|
tdb_add_inp(tdb, inp, 0);
|
| 837 |
|
|
|
| 838 |
|
|
m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */
|
| 839 |
|
|
|
| 840 |
|
|
/* Callee frees mbuf */
|
| 841 |
|
|
error = ipsp_process_packet(m, tdb, AF_INET6, 0);
|
| 842 |
|
|
splx(s);
|
| 843 |
|
|
|
| 844 |
|
|
return error; /* Nothing more to be done */
|
| 845 |
|
|
}
|
| 846 |
|
|
#else
|
| 847 |
|
|
if (needipsec && needipsectun) {
|
| 848 |
|
|
struct ipsec_output_state state;
|
| 849 |
|
|
|
| 850 |
|
|
/*
|
| 851 |
|
|
* All the extension headers will become inaccessible
|
| 852 |
|
|
* (since they can be encrypted).
|
| 853 |
|
|
* Don't panic, we need no more updates to extension headers
|
| 854 |
|
|
* on inner IPv6 packet (since they are now encapsulated).
|
| 855 |
|
|
*
|
| 856 |
|
|
* IPv6 [ESP|AH] IPv6 [extension headers] payload
|
| 857 |
|
|
*/
|
| 858 |
|
|
bzero(&exthdrs, sizeof(exthdrs));
|
| 859 |
|
|
exthdrs.ip6e_ip6 = m;
|
| 860 |
|
|
|
| 861 |
|
|
bzero(&state, sizeof(state));
|
| 862 |
|
|
state.m = m;
|
| 863 |
|
|
state.ro = (struct route *)ro;
|
| 864 |
|
|
state.dst = (struct sockaddr *)dst;
|
| 865 |
|
|
|
| 866 |
|
|
error = ipsec6_output_tunnel(&state, sp, flags);
|
| 867 |
|
|
|
| 868 |
|
|
m = state.m;
|
| 869 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 870 |
|
|
ro = state.ro;
|
| 871 |
|
|
#else
|
| 872 |
|
|
ro = (struct route_in6 *)state.ro;
|
| 873 |
|
|
#endif
|
| 874 |
|
|
dst = (struct sockaddr_in6 *)state.dst;
|
| 875 |
|
|
if (error) {
|
| 876 |
|
|
/* mbuf is already reclaimed in ipsec6_output_tunnel. */
|
| 877 |
|
|
m0 = m = NULL;
|
| 878 |
|
|
m = NULL;
|
| 879 |
|
|
switch (error) {
|
| 880 |
|
|
case EHOSTUNREACH:
|
| 881 |
|
|
case ENETUNREACH:
|
| 882 |
|
|
case EMSGSIZE:
|
| 883 |
|
|
case ENOBUFS:
|
| 884 |
|
|
case ENOMEM:
|
| 885 |
|
|
break;
|
| 886 |
|
|
default:
|
| 887 |
|
|
printf("ip6_output (ipsec): error code %d\n", error);
|
| 888 |
|
|
/* fall through */
|
| 889 |
|
|
case ENOENT:
|
| 890 |
|
|
/* don't show these error codes to the user */
|
| 891 |
|
|
error = 0;
|
| 892 |
|
|
break;
|
| 893 |
|
|
}
|
| 894 |
|
|
goto bad;
|
| 895 |
|
|
}
|
| 896 |
|
|
|
| 897 |
|
|
exthdrs.ip6e_ip6 = m;
|
| 898 |
|
|
}
|
| 899 |
|
|
#endif /* OpenBSD */
|
| 900 |
|
|
#endif /* IPSEC */
|
| 901 |
|
|
|
| 902 |
|
|
/* if specified, fill in the traffic class field. */
|
| 903 |
|
|
if (opt) {
|
| 904 |
|
|
ip6->ip6_flow &= ~htonl(0xff << 20);
|
| 905 |
|
|
if (opt->ip6po_tclass >= 0)
|
| 906 |
|
|
ip6->ip6_flow |=
|
| 907 |
|
|
htonl((opt->ip6po_tclass & 0xff) << 20);
|
| 908 |
|
|
}
|
| 909 |
|
|
/* fill in or override the hop limit field, if necessary. */
|
| 910 |
|
|
if (opt && opt->ip6po_hlim != -1)
|
| 911 |
|
|
ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
|
| 912 |
|
|
else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
| 913 |
|
|
if (im6o != NULL)
|
| 914 |
|
|
ip6->ip6_hlim = im6o->im6o_multicast_hlim;
|
| 915 |
|
|
else
|
| 916 |
|
|
ip6->ip6_hlim = ip6_defmcasthlim;
|
| 917 |
|
|
}
|
| 918 |
|
|
|
| 919 |
|
|
{
|
| 920 |
|
|
/*
|
| 921 |
|
|
* XXX: using a block just to define a local variables is not
|
| 922 |
|
|
* a good style....
|
| 923 |
|
|
*/
|
| 924 |
|
|
struct ifnet *ifp0 = NULL;
|
| 925 |
|
|
struct sockaddr_in6 src;
|
| 926 |
|
|
struct sockaddr_in6 dst0;
|
| 927 |
|
|
int clone = 0;
|
| 928 |
|
|
int64_t zone;
|
| 929 |
|
|
|
| 930 |
|
|
/*
|
| 931 |
|
|
* XXX: sockaddr_in6 for the destination should be passed
|
| 932 |
|
|
* from the upper layer with a proper scope zone ID, in order
|
| 933 |
|
|
* to make a copy here.
|
| 934 |
|
|
*/
|
| 935 |
|
|
bzero(&dst0, sizeof(dst0));
|
| 936 |
|
|
dst0.sin6_family = AF_INET6;
|
| 937 |
|
|
dst0.sin6_len = sizeof(dst0);
|
| 938 |
|
|
dst0.sin6_addr = ip6->ip6_dst;
|
| 939 |
|
|
#ifdef SCOPEDROUTING
|
| 940 |
|
|
/* XXX: in6_recoverscope will clear the embedded ID */
|
| 941 |
|
|
error = in6_recoverscope(&dst0, &dst0.sin6_addr, NULL);
|
| 942 |
|
|
if (error != 0) {
|
| 943 |
|
|
ip6stat.ip6s_badscope++;
|
| 944 |
|
|
in6_ifstat_inc(ifp, ifs6_out_discard);
|
| 945 |
|
|
goto bad;
|
| 946 |
|
|
}
|
| 947 |
|
|
#endif
|
| 948 |
|
|
|
| 949 |
|
|
#if defined(__bsdi__) || defined(__FreeBSD__)
|
| 950 |
|
|
if (ro != &ip6route && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst))
|
| 951 |
|
|
clone = 1;
|
| 952 |
|
|
#endif
|
| 953 |
|
|
|
| 954 |
|
|
if ((error = in6_selectroute(&dst0, opt, im6o, ro,
|
| 955 |
|
|
&ifp, &rt, clone)) != 0) {
|
| 956 |
|
|
switch (error) {
|
| 957 |
|
|
case EHOSTUNREACH:
|
| 958 |
|
|
ip6stat.ip6s_noroute++;
|
| 959 |
|
|
break;
|
| 960 |
|
|
case EADDRNOTAVAIL:
|
| 961 |
|
|
default:
|
| 962 |
|
|
break; /* XXX statistics? */
|
| 963 |
|
|
}
|
| 964 |
|
|
if (ifp != NULL)
|
| 965 |
|
|
in6_ifstat_inc(ifp, ifs6_out_discard);
|
| 966 |
|
|
goto bad;
|
| 967 |
|
|
}
|
| 968 |
|
|
if (rt == NULL) {
|
| 969 |
|
|
/*
|
| 970 |
|
|
* If in6_selectroute() does not return a route entry,
|
| 971 |
|
|
* dst may not have been updated.
|
| 972 |
|
|
*/
|
| 973 |
|
|
*dst = dst0; /* XXX */
|
| 974 |
|
|
}
|
| 975 |
|
|
|
| 976 |
|
|
/*
|
| 977 |
|
|
* then rt (for unicast) and ifp must be non-NULL valid values.
|
| 978 |
|
|
*/
|
| 979 |
|
|
if ((flags & IPV6_FORWARDING) == 0) {
|
| 980 |
|
|
/* XXX: the FORWARDING flag can be set for mrouting. */
|
| 981 |
|
|
in6_ifstat_inc(ifp, ifs6_out_request);
|
| 982 |
|
|
}
|
| 983 |
|
|
if (rt != NULL) {
|
| 984 |
|
|
ia = (struct in6_ifaddr *)(rt->rt_ifa);
|
| 985 |
|
|
rt->rt_use++;
|
| 986 |
|
|
}
|
| 987 |
|
|
|
| 988 |
|
|
/*
|
| 989 |
|
|
* The outgoing interface must be in the zone of source and
|
| 990 |
|
|
* destination addresses. We should use ia_ifp to support the
|
| 991 |
|
|
* case of sending packets to an address of our own.
|
| 992 |
|
|
*/
|
| 993 |
|
|
if (ia != NULL && ia->ia_ifp)
|
| 994 |
|
|
ifp0 = ia->ia_ifp;
|
| 995 |
|
|
else
|
| 996 |
|
|
ifp0 = ifp;
|
| 997 |
|
|
/* XXX: we should not do this conversion for every packet. */
|
| 998 |
|
|
bzero(&src, sizeof(src));
|
| 999 |
|
|
src.sin6_family = AF_INET6;
|
| 1000 |
|
|
src.sin6_len = sizeof(src);
|
| 1001 |
|
|
src.sin6_addr = ip6->ip6_src;
|
| 1002 |
|
|
if ((error = in6_recoverscope(&src, &ip6->ip6_src, NULL))
|
| 1003 |
|
|
!= 0) {
|
| 1004 |
|
|
goto badscope;
|
| 1005 |
|
|
}
|
| 1006 |
|
|
if ((zone = in6_addr2zoneid(ifp0, &src.sin6_addr)) < 0 ||
|
| 1007 |
|
|
zone != src.sin6_scope_id) {
|
| 1008 |
|
|
#ifdef SCOPEDEBUG /* will be removed shortly */
|
| 1009 |
|
|
printf("ip6 output: bad source scope %s for %s on %s\n",
|
| 1010 |
|
|
ip6_sprintf(&ip6->ip6_src),
|
| 1011 |
|
|
ip6_sprintf(&ip6->ip6_dst), if_name(ifp0));
|
| 1012 |
|
|
#endif
|
| 1013 |
|
|
goto badscope;
|
| 1014 |
|
|
}
|
| 1015 |
|
|
/* XXX: in6_recoverscope will clear the embedded ID */
|
| 1016 |
|
|
if ((error = in6_recoverscope(&dst0, &ip6->ip6_dst, NULL))
|
| 1017 |
|
|
!= 0) {
|
| 1018 |
|
|
goto badscope;
|
| 1019 |
|
|
}
|
| 1020 |
|
|
if ((zone = in6_addr2zoneid(ifp0, &dst0.sin6_addr)) < 0 ||
|
| 1021 |
|
|
zone != dst0.sin6_scope_id) {
|
| 1022 |
|
|
#ifdef SCOPEDEBUG /* will be removed shortly */
|
| 1023 |
|
|
printf("ip6 output: bad dst scope %s on %s\n",
|
| 1024 |
|
|
ip6_sprintf(&dst0.sin6_addr), if_name(ifp0));
|
| 1025 |
|
|
#endif
|
| 1026 |
|
|
goto badscope;
|
| 1027 |
|
|
}
|
| 1028 |
|
|
|
| 1029 |
|
|
/* scope check is done. */
|
| 1030 |
|
|
goto routefound;
|
| 1031 |
|
|
|
| 1032 |
|
|
badscope:
|
| 1033 |
|
|
ip6stat.ip6s_badscope++;
|
| 1034 |
|
|
in6_ifstat_inc(ifp0, ifs6_out_discard);
|
| 1035 |
|
|
if (error == 0)
|
| 1036 |
|
|
error = EHOSTUNREACH; /* XXX */
|
| 1037 |
|
|
goto bad;
|
| 1038 |
|
|
}
|
| 1039 |
|
|
|
| 1040 |
|
|
routefound:
|
| 1041 |
|
|
if (rt) {
|
| 1042 |
|
|
if (opt && opt->ip6po_nextroute.ro_rt) {
|
| 1043 |
|
|
/*
|
| 1044 |
|
|
* The nexthop is explicitly specified by the
|
| 1045 |
|
|
* application. We assume the next hop is an IPv6
|
| 1046 |
|
|
* address.
|
| 1047 |
|
|
*/
|
| 1048 |
|
|
dst = (struct sockaddr_in6 *)opt->ip6po_nexthop;
|
| 1049 |
|
|
}
|
| 1050 |
|
|
else if ((rt->rt_flags & RTF_GATEWAY))
|
| 1051 |
|
|
dst = (struct sockaddr_in6 *)rt->rt_gateway;
|
| 1052 |
|
|
}
|
| 1053 |
|
|
|
| 1054 |
|
|
if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
| 1055 |
|
|
m->m_flags &= ~(M_BCAST | M_MCAST); /* just in case */
|
| 1056 |
|
|
} else {
|
| 1057 |
|
|
struct in6_multi *in6m;
|
| 1058 |
|
|
|
| 1059 |
|
|
m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
|
| 1060 |
|
|
|
| 1061 |
|
|
in6_ifstat_inc(ifp, ifs6_out_mcast);
|
| 1062 |
|
|
|
| 1063 |
|
|
/*
|
| 1064 |
|
|
* Confirm that the outgoing interface supports multicast.
|
| 1065 |
|
|
*/
|
| 1066 |
|
|
if (!(ifp->if_flags & IFF_MULTICAST)) {
|
| 1067 |
|
|
ip6stat.ip6s_noroute++;
|
| 1068 |
|
|
in6_ifstat_inc(ifp, ifs6_out_discard);
|
| 1069 |
|
|
error = ENETUNREACH;
|
| 1070 |
|
|
goto bad;
|
| 1071 |
|
|
}
|
| 1072 |
|
|
IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
|
| 1073 |
|
|
if (in6m != NULL &&
|
| 1074 |
|
|
(im6o == NULL || im6o->im6o_multicast_loop)) {
|
| 1075 |
|
|
/*
|
| 1076 |
|
|
* If we belong to the destination multicast group
|
| 1077 |
|
|
* on the outgoing interface, and the caller did not
|
| 1078 |
|
|
* forbid loopback, loop back a copy.
|
| 1079 |
|
|
*/
|
| 1080 |
|
|
ip6_mloopback(ifp, m, dst);
|
| 1081 |
|
|
} else {
|
| 1082 |
|
|
/*
|
| 1083 |
|
|
* If we are acting as a multicast router, perform
|
| 1084 |
|
|
* multicast forwarding as if the packet had just
|
| 1085 |
|
|
* arrived on the interface to which we are about
|
| 1086 |
|
|
* to send. The multicast forwarding function
|
| 1087 |
|
|
* recursively calls this function, using the
|
| 1088 |
|
|
* IPV6_FORWARDING flag to prevent infinite recursion.
|
| 1089 |
|
|
*
|
| 1090 |
|
|
* Multicasts that are looped back by ip6_mloopback(),
|
| 1091 |
|
|
* above, will be forwarded by the ip6_input() routine,
|
| 1092 |
|
|
* if necessary.
|
| 1093 |
|
|
*/
|
| 1094 |
|
|
if (ip6_mrouter && (flags & IPV6_FORWARDING) == 0) {
|
| 1095 |
|
|
/*
|
| 1096 |
|
|
* XXX: ip6_mforward expects that rcvif is NULL
|
| 1097 |
|
|
* when it is called from the originating path.
|
| 1098 |
|
|
* However, it is not always the case, since
|
| 1099 |
|
|
* some versions of MGETHDR() does not
|
| 1100 |
|
|
* initialize the field.
|
| 1101 |
|
|
*/
|
| 1102 |
|
|
m->m_pkthdr.rcvif = NULL;
|
| 1103 |
|
|
if (ip6_mforward(ip6, ifp, m) != 0) {
|
| 1104 |
|
|
m_freem(m);
|
| 1105 |
|
|
goto done;
|
| 1106 |
|
|
}
|
| 1107 |
|
|
}
|
| 1108 |
|
|
}
|
| 1109 |
|
|
/*
|
| 1110 |
|
|
* Multicasts with a hoplimit of zero may be looped back,
|
| 1111 |
|
|
* above, but must not be transmitted on a network.
|
| 1112 |
|
|
* Also, multicasts addressed to the loopback interface
|
| 1113 |
|
|
* are not sent -- the above call to ip6_mloopback() will
|
| 1114 |
|
|
* loop back a copy if this host actually belongs to the
|
| 1115 |
|
|
* destination group on the loopback interface.
|
| 1116 |
|
|
*/
|
| 1117 |
|
|
if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK) ||
|
| 1118 |
|
|
IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) {
|
| 1119 |
|
|
m_freem(m);
|
| 1120 |
|
|
goto done;
|
| 1121 |
|
|
}
|
| 1122 |
|
|
}
|
| 1123 |
|
|
|
| 1124 |
|
|
/*
|
| 1125 |
|
|
* Fill the outgoing inteface to tell the upper layer
|
| 1126 |
|
|
* to increment per-interface statistics.
|
| 1127 |
|
|
*/
|
| 1128 |
|
|
if (ifpp)
|
| 1129 |
|
|
*ifpp = ifp;
|
| 1130 |
|
|
|
| 1131 |
|
|
/*
|
| 1132 |
|
|
* Upper-layer reachability confirmation
|
| 1133 |
|
|
*/
|
| 1134 |
|
|
if (opt && (opt->ip6po_flags & IP6PO_REACHCONF))
|
| 1135 |
|
|
nd6_nud_hint(rt, NULL, 0);
|
| 1136 |
|
|
|
| 1137 |
|
|
/* Determine path MTU. */
|
| 1138 |
|
|
if ((error = ip6_getpmtu(ro_pmtu, ro, ifp, &finaldst, &mtu)) != 0)
|
| 1139 |
|
|
goto bad;
|
| 1140 |
|
|
|
| 1141 |
|
|
/*
|
| 1142 |
|
|
* An advanced API option (IPV6_USE_MIN_MTU) overrides mtu setting.
|
| 1143 |
|
|
* We ignore the specified MTU if it is larger than the already-known
|
| 1144 |
|
|
* path MTU.
|
| 1145 |
|
|
*/
|
| 1146 |
|
|
if (mtu > IPV6_MMTU && opt && (opt->ip6po_flags & IP6PO_MINMTU))
|
| 1147 |
|
|
mtu = IPV6_MMTU;
|
| 1148 |
|
|
|
| 1149 |
|
|
/* Fake scoped addresses */
|
| 1150 |
|
|
if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
|
| 1151 |
|
|
/*
|
| 1152 |
|
|
* If source or destination address is a scoped address, and
|
| 1153 |
|
|
* the packet is going to be sent to a loopback interface,
|
| 1154 |
|
|
* we should keep the original interface.
|
| 1155 |
|
|
*/
|
| 1156 |
|
|
|
| 1157 |
|
|
/*
|
| 1158 |
|
|
* XXX: this is a very experimental and temporary solution.
|
| 1159 |
|
|
* We eventually have sockaddr_in6 and use the sin6_scope_id
|
| 1160 |
|
|
* field of the structure here.
|
| 1161 |
|
|
* We rely on the consistency between two scope zone ids
|
| 1162 |
|
|
* of source and destination, which should already be assured.
|
| 1163 |
|
|
* Larger scopes than link will be supported in the future.
|
| 1164 |
|
|
*/
|
| 1165 |
|
|
origifp = NULL;
|
| 1166 |
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) {
|
| 1167 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 1168 |
|
|
origifp = ifnet_byindex(ntohs(ip6->ip6_src.s6_addr16[1]));
|
| 1169 |
|
|
#else
|
| 1170 |
|
|
origifp = ifindex2ifnet[ntohs(ip6->ip6_src.s6_addr16[1])];
|
| 1171 |
|
|
#endif
|
| 1172 |
|
|
} else if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
|
| 1173 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 1174 |
|
|
origifp = ifnet_byindex(ntohs(ip6->ip6_dst.s6_addr16[1]));
|
| 1175 |
|
|
#else
|
| 1176 |
|
|
origifp = ifindex2ifnet[ntohs(ip6->ip6_dst.s6_addr16[1])];
|
| 1177 |
|
|
#endif
|
| 1178 |
|
|
} else if (IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) {
|
| 1179 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 1180 |
|
|
origifp = ifnet_byindex(ntohs(ip6->ip6_dst.s6_addr16[1]));
|
| 1181 |
|
|
#else
|
| 1182 |
|
|
origifp = ifindex2ifnet[ntohs(ip6->ip6_dst.s6_addr16[1])];
|
| 1183 |
|
|
#endif
|
| 1184 |
|
|
}
|
| 1185 |
|
|
|
| 1186 |
|
|
/*
|
| 1187 |
|
|
* XXX: origifp can be NULL even in those two cases above.
|
| 1188 |
|
|
* For example, if we remove the (only) link-local address
|
| 1189 |
|
|
* from the loopback interface, and try to send a link-local
|
| 1190 |
|
|
* address without link-id information. Then the source
|
| 1191 |
|
|
* address is ::1, and the destination address is the
|
| 1192 |
|
|
* link-local address with its s6_addr16[1] being zero.
|
| 1193 |
|
|
* What is worse, if the packet goes to the loopback interface
|
| 1194 |
|
|
* by a default rejected route, the null pointer would be
|
| 1195 |
|
|
* passed to looutput, and the kernel would hang.
|
| 1196 |
|
|
* The following last resort would prevent such disaster.
|
| 1197 |
|
|
*/
|
| 1198 |
|
|
if (origifp == NULL)
|
| 1199 |
|
|
origifp = ifp;
|
| 1200 |
|
|
}
|
| 1201 |
|
|
else
|
| 1202 |
|
|
origifp = ifp;
|
| 1203 |
|
|
#ifndef SCOPEDROUTING
|
| 1204 |
|
|
/*
|
| 1205 |
|
|
* clear embedded scope identifiers if necessary.
|
| 1206 |
|
|
* in6_clearscope will touch the addresses only when necessary.
|
| 1207 |
|
|
*/
|
| 1208 |
|
|
in6_clearscope(&ip6->ip6_src);
|
| 1209 |
|
|
in6_clearscope(&ip6->ip6_dst);
|
| 1210 |
|
|
#endif
|
| 1211 |
|
|
|
| 1212 |
|
|
#if defined(IPV6FIREWALL) || (defined(__FreeBSD__) && __FreeBSD__ >= 4)
|
| 1213 |
|
|
/*
|
| 1214 |
|
|
* Check with the firewall...
|
| 1215 |
|
|
*/
|
| 1216 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
|
| 1217 |
|
|
if (ip6_fw_enable && ip6_fw_chk_ptr) {
|
| 1218 |
|
|
#else
|
| 1219 |
|
|
if (ip6_fw_chk_ptr) {
|
| 1220 |
|
|
#endif
|
| 1221 |
|
|
m->m_pkthdr.rcvif = NULL; /* XXX */
|
| 1222 |
|
|
/* If ipfw says divert, we have to just drop packet */
|
| 1223 |
|
|
if ((*ip6_fw_chk_ptr)(&ip6, ifp, &m)) {
|
| 1224 |
|
|
m_freem(m);
|
| 1225 |
|
|
goto done;
|
| 1226 |
|
|
}
|
| 1227 |
|
|
if (!m) {
|
| 1228 |
|
|
error = EACCES;
|
| 1229 |
|
|
goto done;
|
| 1230 |
|
|
}
|
| 1231 |
|
|
}
|
| 1232 |
|
|
#endif
|
| 1233 |
|
|
|
| 1234 |
|
|
/*
|
| 1235 |
|
|
* If the outgoing packet contains a hop-by-hop options header,
|
| 1236 |
|
|
* it must be examined and processed even by the source node.
|
| 1237 |
|
|
* (RFC 2460, section 4.)
|
| 1238 |
|
|
*/
|
| 1239 |
|
|
if (exthdrs.ip6e_hbh) {
|
| 1240 |
|
|
struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *);
|
| 1241 |
|
|
u_int32_t dummy; /* XXX unused */
|
| 1242 |
|
|
u_int32_t plen = 0; /* XXX: ip6_process will check the value */
|
| 1243 |
|
|
|
| 1244 |
|
|
#ifdef DIAGNOSTIC
|
| 1245 |
|
|
if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len)
|
| 1246 |
|
|
panic("ip6e_hbh is not continuous");
|
| 1247 |
|
|
#endif
|
| 1248 |
|
|
/*
|
| 1249 |
|
|
* XXX: if we have to send an ICMPv6 error to the sender,
|
| 1250 |
|
|
* we need the M_LOOP flag since icmp6_error() expects
|
| 1251 |
|
|
* the IPv6 and the hop-by-hop options header are
|
| 1252 |
|
|
* continuous unless the flag is set.
|
| 1253 |
|
|
*/
|
| 1254 |
|
|
m->m_flags |= M_LOOP;
|
| 1255 |
|
|
m->m_pkthdr.rcvif = ifp;
|
| 1256 |
|
|
if (ip6_process_hopopts(m,
|
| 1257 |
|
|
(u_int8_t *)(hbh + 1),
|
| 1258 |
|
|
((hbh->ip6h_len + 1) << 3) -
|
| 1259 |
|
|
sizeof(struct ip6_hbh),
|
| 1260 |
|
|
&dummy, &plen) < 0) {
|
| 1261 |
|
|
/* m was already freed at this point */
|
| 1262 |
|
|
error = EINVAL;/* better error? */
|
| 1263 |
|
|
goto done;
|
| 1264 |
|
|
}
|
| 1265 |
|
|
m->m_flags &= ~M_LOOP; /* XXX */
|
| 1266 |
|
|
m->m_pkthdr.rcvif = NULL;
|
| 1267 |
|
|
}
|
| 1268 |
|
|
|
| 1269 |
|
|
#if defined(__NetBSD__) && defined(PFIL_HOOKS)
|
| 1270 |
|
|
/*
|
| 1271 |
|
|
* Run through list of hooks for output packets.
|
| 1272 |
|
|
*/
|
| 1273 |
|
|
m1 = m;
|
| 1274 |
|
|
pfh = pfil_hook_get(PFIL_OUT, &inetsw[ip_protox[IPPROTO_IPV6]].pr_pfh);
|
| 1275 |
|
|
for (; pfh; pfh = pfh->pfil_link.tqe_next)
|
| 1276 |
|
|
if (pfh->pfil_func) {
|
| 1277 |
|
|
rv = pfh->pfil_func(ip6, sizeof(*ip6), ifp, 1, &m1);
|
| 1278 |
|
|
if (rv) {
|
| 1279 |
|
|
error = EHOSTUNREACH;
|
| 1280 |
|
|
goto done;
|
| 1281 |
|
|
}
|
| 1282 |
|
|
m = m1;
|
| 1283 |
|
|
if (m == NULL)
|
| 1284 |
|
|
goto done;
|
| 1285 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 1286 |
|
|
}
|
| 1287 |
|
|
#endif /* PFIL_HOOKS */
|
| 1288 |
|
|
|
| 1289 |
|
|
#if defined(__OpenBSD__) && NPF > 0
|
| 1290 |
|
|
if (pf_test6(PF_OUT, ifp, &m) != PF_PASS) {
|
| 1291 |
|
|
error = EHOSTUNREACH;
|
| 1292 |
|
|
m_freem(m);
|
| 1293 |
|
|
goto done;
|
| 1294 |
|
|
}
|
| 1295 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 1296 |
|
|
#endif
|
| 1297 |
|
|
|
| 1298 |
|
|
/*
|
| 1299 |
|
|
* Send the packet to the outgoing interface.
|
| 1300 |
|
|
* If necessary, do IPv6 fragmentation before sending.
|
| 1301 |
|
|
*/
|
| 1302 |
|
|
tlen = m->m_pkthdr.len;
|
| 1303 |
|
|
/*
|
| 1304 |
|
|
* Even if the DONTFRAG option is specified, we cannot send the packet
|
| 1305 |
|
|
* when the data length is larger than the MTU of the outgoing
|
| 1306 |
|
|
* interface.
|
| 1307 |
|
|
* Notify the error by sending IPV6_PATHMTU ancillary data as well
|
| 1308 |
|
|
* as returning an error code (the latter is not described in the API
|
| 1309 |
|
|
* spec.)
|
| 1310 |
|
|
*/
|
| 1311 |
|
|
if (opt && (opt->ip6po_flags & IP6PO_DONTFRAG) && tlen > ifp->if_mtu
|
| 1312 |
|
|
#ifdef notyet
|
| 1313 |
|
|
&& !(ifp->if_flags & IFF_FRAGMENTABLE)
|
| 1314 |
|
|
#endif
|
| 1315 |
|
|
) {
|
| 1316 |
|
|
u_int32_t mtu32;
|
| 1317 |
|
|
struct ip6ctlparam ip6cp;
|
| 1318 |
|
|
|
| 1319 |
|
|
mtu32 = (u_int32_t)mtu;
|
| 1320 |
|
|
bzero(&ip6cp, sizeof(ip6cp));
|
| 1321 |
|
|
ip6cp.ip6c_cmdarg = (void *)&mtu32;
|
| 1322 |
|
|
pfctlinput2(PRC_MSGSIZE, &ro_pmtu->ro_dst, (void *)&ip6cp);
|
| 1323 |
|
|
|
| 1324 |
|
|
error = EMSGSIZE;
|
| 1325 |
|
|
goto bad;
|
| 1326 |
|
|
}
|
| 1327 |
|
|
if (tlen <= mtu || (opt && (opt->ip6po_flags & IP6PO_DONTFRAG))
|
| 1328 |
|
|
#ifdef notyet
|
| 1329 |
|
|
/*
|
| 1330 |
|
|
* On any link that cannot convey a 1280-octet packet in one piece,
|
| 1331 |
|
|
* link-specific fragmentation and reassembly must be provided at
|
| 1332 |
|
|
* a layer below IPv6. [RFC 2460, sec.5]
|
| 1333 |
|
|
* Thus if the interface has ability of link-level fragmentation,
|
| 1334 |
|
|
* we can just send the packet even if the packet size is
|
| 1335 |
|
|
* larger than the link's MTU.
|
| 1336 |
|
|
* XXX: IFF_FRAGMENTABLE (or such) flag has not been defined yet...
|
| 1337 |
|
|
*/
|
| 1338 |
|
|
|
| 1339 |
|
|
|| (ifp->if_flags & IFF_FRAGMENTABLE)
|
| 1340 |
|
|
#endif
|
| 1341 |
|
|
)
|
| 1342 |
|
|
{
|
| 1343 |
|
|
struct in6_ifaddr *ia6;
|
| 1344 |
|
|
|
| 1345 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 1346 |
|
|
ia6 = in6_ifawithifp(ifp, &ip6->ip6_src);
|
| 1347 |
|
|
if (ia6) {
|
| 1348 |
|
|
/* Record statistics for this interface address. */
|
| 1349 |
|
|
#if defined(__NetBSD__) && defined(IFA_STATS)
|
| 1350 |
|
|
ia6->ia_ifa.ifa_data.ifad_outbytes +=
|
| 1351 |
|
|
m->m_pkthdr.len;
|
| 1352 |
|
|
#elif defined(__FreeBSD__) && __FreeBSD__ >= 4
|
| 1353 |
|
|
ia6->ia_ifa.if_opackets++;
|
| 1354 |
|
|
ia6->ia_ifa.if_obytes += m->m_pkthdr.len;
|
| 1355 |
|
|
#elif defined(__bsdi__) && _BSDI_VERSION >= 199802
|
| 1356 |
|
|
ia6->ia_ifa.ifa_opackets++;
|
| 1357 |
|
|
ia6->ia_ifa.ifa_obytes += m->m_pkthdr.len;
|
| 1358 |
|
|
#endif
|
| 1359 |
|
|
}
|
| 1360 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 1361 |
|
|
/* clean ipsec history once it goes out of the node */
|
| 1362 |
|
|
ipsec_delaux(m);
|
| 1363 |
|
|
#endif
|
| 1364 |
|
|
error = nd6_output(ifp, origifp, m, dst, rt);
|
| 1365 |
|
|
goto done;
|
| 1366 |
|
|
} else if (mtu < IPV6_MMTU) {
|
| 1367 |
|
|
/*
|
| 1368 |
|
|
* note that path MTU is never less than IPV6_MMTU
|
| 1369 |
|
|
* (see icmp6_input).
|
| 1370 |
|
|
*/
|
| 1371 |
|
|
error = EMSGSIZE;
|
| 1372 |
|
|
in6_ifstat_inc(ifp, ifs6_out_fragfail);
|
| 1373 |
|
|
goto bad;
|
| 1374 |
|
|
} else if (ip6->ip6_plen == 0) { /* jumbo payload cannot be fragmented */
|
| 1375 |
|
|
error = EMSGSIZE;
|
| 1376 |
|
|
in6_ifstat_inc(ifp, ifs6_out_fragfail);
|
| 1377 |
|
|
goto bad;
|
| 1378 |
|
|
} else {
|
| 1379 |
|
|
struct mbuf **mnext, *m_frgpart;
|
| 1380 |
|
|
struct ip6_frag *ip6f;
|
| 1381 |
|
|
u_int32_t id = htonl(ip6_id++);
|
| 1382 |
|
|
u_char nextproto;
|
| 1383 |
|
|
struct ip6ctlparam ip6cp;
|
| 1384 |
|
|
u_int32_t mtu32;
|
| 1385 |
|
|
|
| 1386 |
|
|
/*
|
| 1387 |
|
|
* Too large for the destination or interface;
|
| 1388 |
|
|
* fragment if possible.
|
| 1389 |
|
|
* Must be able to put at least 8 bytes per fragment.
|
| 1390 |
|
|
*/
|
| 1391 |
|
|
hlen = unfragpartlen;
|
| 1392 |
|
|
if (mtu > IPV6_MAXPACKET)
|
| 1393 |
|
|
mtu = IPV6_MAXPACKET;
|
| 1394 |
|
|
|
| 1395 |
|
|
/* Notify a proper path MTU to applications. */
|
| 1396 |
|
|
mtu32 = (u_int32_t)mtu;
|
| 1397 |
|
|
bzero(&ip6cp, sizeof(ip6cp));
|
| 1398 |
|
|
ip6cp.ip6c_cmdarg = (void *)&mtu32;
|
| 1399 |
|
|
pfctlinput2(PRC_MSGSIZE, &ro_pmtu->ro_dst, (void *)&ip6cp);
|
| 1400 |
|
|
|
| 1401 |
|
|
len = (mtu - hlen - sizeof(struct ip6_frag)) & ~7;
|
| 1402 |
|
|
if (len < 8) {
|
| 1403 |
|
|
error = EMSGSIZE;
|
| 1404 |
|
|
in6_ifstat_inc(ifp, ifs6_out_fragfail);
|
| 1405 |
|
|
goto bad;
|
| 1406 |
|
|
}
|
| 1407 |
|
|
|
| 1408 |
|
|
mnext = &m->m_nextpkt;
|
| 1409 |
|
|
|
| 1410 |
|
|
/*
|
| 1411 |
|
|
* Change the next header field of the last header in the
|
| 1412 |
|
|
* unfragmentable part.
|
| 1413 |
|
|
*/
|
| 1414 |
|
|
#ifdef MIP6
|
| 1415 |
|
|
if (exthdrs.ip6e_haddr) {
|
| 1416 |
|
|
nextproto = *mtod(exthdrs.ip6e_haddr, u_char *);
|
| 1417 |
|
|
*mtod(exthdrs.ip6e_haddr, u_char *) = IPPROTO_FRAGMENT;
|
| 1418 |
|
|
} else
|
| 1419 |
|
|
#endif /* MIP6 */
|
| 1420 |
|
|
if (exthdrs.ip6e_rthdr) {
|
| 1421 |
|
|
nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *);
|
| 1422 |
|
|
*mtod(exthdrs.ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT;
|
| 1423 |
|
|
} else if (exthdrs.ip6e_dest1) {
|
| 1424 |
|
|
nextproto = *mtod(exthdrs.ip6e_dest1, u_char *);
|
| 1425 |
|
|
*mtod(exthdrs.ip6e_dest1, u_char *) = IPPROTO_FRAGMENT;
|
| 1426 |
|
|
} else if (exthdrs.ip6e_hbh) {
|
| 1427 |
|
|
nextproto = *mtod(exthdrs.ip6e_hbh, u_char *);
|
| 1428 |
|
|
*mtod(exthdrs.ip6e_hbh, u_char *) = IPPROTO_FRAGMENT;
|
| 1429 |
|
|
} else {
|
| 1430 |
|
|
nextproto = ip6->ip6_nxt;
|
| 1431 |
|
|
ip6->ip6_nxt = IPPROTO_FRAGMENT;
|
| 1432 |
|
|
}
|
| 1433 |
|
|
|
| 1434 |
|
|
/*
|
| 1435 |
|
|
* Loop through length of segment after first fragment,
|
| 1436 |
|
|
* make new header and copy data of each part and link onto
|
| 1437 |
|
|
* chain.
|
| 1438 |
|
|
*/
|
| 1439 |
|
|
m0 = m;
|
| 1440 |
|
|
for (off = hlen; off < tlen; off += len) {
|
| 1441 |
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
| 1442 |
|
|
if (!m) {
|
| 1443 |
|
|
error = ENOBUFS;
|
| 1444 |
|
|
ip6stat.ip6s_odropped++;
|
| 1445 |
|
|
goto sendorfree;
|
| 1446 |
|
|
}
|
| 1447 |
|
|
m->m_pkthdr.rcvif = NULL;
|
| 1448 |
|
|
m->m_flags = m0->m_flags & M_COPYFLAGS;
|
| 1449 |
|
|
*mnext = m;
|
| 1450 |
|
|
mnext = &m->m_nextpkt;
|
| 1451 |
|
|
m->m_data += max_linkhdr;
|
| 1452 |
|
|
mhip6 = mtod(m, struct ip6_hdr *);
|
| 1453 |
|
|
*mhip6 = *ip6;
|
| 1454 |
|
|
m->m_len = sizeof(*mhip6);
|
| 1455 |
|
|
error = ip6_insertfraghdr(m0, m, hlen, &ip6f);
|
| 1456 |
|
|
if (error) {
|
| 1457 |
|
|
ip6stat.ip6s_odropped++;
|
| 1458 |
|
|
goto sendorfree;
|
| 1459 |
|
|
}
|
| 1460 |
|
|
ip6f->ip6f_offlg = htons((u_short)((off - hlen) & ~7));
|
| 1461 |
|
|
if (off + len >= tlen)
|
| 1462 |
|
|
len = tlen - off;
|
| 1463 |
|
|
else
|
| 1464 |
|
|
ip6f->ip6f_offlg |= IP6F_MORE_FRAG;
|
| 1465 |
|
|
mhip6->ip6_plen = htons((u_short)(len + hlen +
|
| 1466 |
|
|
sizeof(*ip6f) -
|
| 1467 |
|
|
sizeof(struct ip6_hdr)));
|
| 1468 |
|
|
if ((m_frgpart = m_copy(m0, off, len)) == 0) {
|
| 1469 |
|
|
error = ENOBUFS;
|
| 1470 |
|
|
ip6stat.ip6s_odropped++;
|
| 1471 |
|
|
goto sendorfree;
|
| 1472 |
|
|
}
|
| 1473 |
|
|
m_cat(m, m_frgpart);
|
| 1474 |
|
|
m->m_pkthdr.len = len + hlen + sizeof(*ip6f);
|
| 1475 |
|
|
m->m_pkthdr.rcvif = (struct ifnet *)0;
|
| 1476 |
|
|
ip6f->ip6f_reserved = 0;
|
| 1477 |
|
|
ip6f->ip6f_ident = id;
|
| 1478 |
|
|
ip6f->ip6f_nxt = nextproto;
|
| 1479 |
|
|
ip6stat.ip6s_ofragments++;
|
| 1480 |
|
|
in6_ifstat_inc(ifp, ifs6_out_fragcreat);
|
| 1481 |
|
|
}
|
| 1482 |
|
|
|
| 1483 |
|
|
in6_ifstat_inc(ifp, ifs6_out_fragok);
|
| 1484 |
|
|
}
|
| 1485 |
|
|
|
| 1486 |
|
|
/*
|
| 1487 |
|
|
* Remove leading garbages.
|
| 1488 |
|
|
*/
|
| 1489 |
|
|
sendorfree:
|
| 1490 |
|
|
m = m0->m_nextpkt;
|
| 1491 |
|
|
m0->m_nextpkt = 0;
|
| 1492 |
|
|
m_freem(m0);
|
| 1493 |
|
|
for (m0 = m; m; m = m0) {
|
| 1494 |
|
|
m0 = m->m_nextpkt;
|
| 1495 |
|
|
m->m_nextpkt = 0;
|
| 1496 |
|
|
if (error == 0) {
|
| 1497 |
|
|
struct in6_ifaddr *ia6;
|
| 1498 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 1499 |
|
|
ia6 = in6_ifawithifp(ifp, &ip6->ip6_src);
|
| 1500 |
|
|
if (ia6) {
|
| 1501 |
|
|
/*
|
| 1502 |
|
|
* Record statistics for this interface
|
| 1503 |
|
|
* address.
|
| 1504 |
|
|
*/
|
| 1505 |
|
|
#if defined(__NetBSD__) && defined(IFA_STATS)
|
| 1506 |
|
|
ia6->ia_ifa.ifa_data.ifad_outbytes +=
|
| 1507 |
|
|
m->m_pkthdr.len;
|
| 1508 |
|
|
#elif defined(__FreeBSD__) && __FreeBSD__ >= 4
|
| 1509 |
|
|
ia6->ia_ifa.if_opackets++;
|
| 1510 |
|
|
ia6->ia_ifa.if_obytes += m->m_pkthdr.len;
|
| 1511 |
|
|
#elif defined(__bsdi__) && _BSDI_VERSION >= 199802
|
| 1512 |
|
|
ia6->ia_ifa.ifa_opackets++;
|
| 1513 |
|
|
ia6->ia_ifa.ifa_obytes += m->m_pkthdr.len;
|
| 1514 |
|
|
#endif
|
| 1515 |
|
|
}
|
| 1516 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 1517 |
|
|
/* clean ipsec history once it goes out of the node */
|
| 1518 |
|
|
ipsec_delaux(m);
|
| 1519 |
|
|
#endif
|
| 1520 |
|
|
error = nd6_output(ifp, origifp, m, dst, rt);
|
| 1521 |
|
|
} else
|
| 1522 |
|
|
m_freem(m);
|
| 1523 |
|
|
}
|
| 1524 |
|
|
|
| 1525 |
|
|
if (error == 0)
|
| 1526 |
|
|
ip6stat.ip6s_fragmented++;
|
| 1527 |
|
|
|
| 1528 |
|
|
done:
|
| 1529 |
|
|
if (ro == &ip6route && ro->ro_rt) { /* brace necessary for RTFREE */
|
| 1530 |
|
|
RTFREE(ro->ro_rt);
|
| 1531 |
|
|
} else if (ro_pmtu == &ip6route && ro_pmtu->ro_rt) {
|
| 1532 |
|
|
RTFREE(ro_pmtu->ro_rt);
|
| 1533 |
|
|
}
|
| 1534 |
|
|
|
| 1535 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 1536 |
|
|
if (sp != NULL)
|
| 1537 |
|
|
key_freesp(sp);
|
| 1538 |
|
|
#endif /* IPSEC */
|
| 1539 |
|
|
|
| 1540 |
|
|
#ifdef MIP6
|
| 1541 |
|
|
mip6_destopt_discard(&mip6opt);
|
| 1542 |
|
|
#endif /* MIP6 */
|
| 1543 |
|
|
|
| 1544 |
|
|
return(error);
|
| 1545 |
|
|
|
| 1546 |
|
|
freehdrs:
|
| 1547 |
|
|
#ifdef MIP6
|
| 1548 |
|
|
mip6_destopt_discard(&mip6opt);
|
| 1549 |
|
|
#endif /* MIP6 */
|
| 1550 |
|
|
m_freem(exthdrs.ip6e_hbh); /* m_freem will check if mbuf is 0 */
|
| 1551 |
|
|
m_freem(exthdrs.ip6e_dest1);
|
| 1552 |
|
|
m_freem(exthdrs.ip6e_rthdr);
|
| 1553 |
|
|
#ifdef MIP6
|
| 1554 |
|
|
m_freem(exthdrs.ip6e_haddr);
|
| 1555 |
|
|
#endif /* MIP6 */
|
| 1556 |
|
|
m_freem(exthdrs.ip6e_dest2);
|
| 1557 |
|
|
/* fall through */
|
| 1558 |
|
|
bad:
|
| 1559 |
|
|
m_freem(m);
|
| 1560 |
|
|
goto done;
|
| 1561 |
|
|
}
|
| 1562 |
|
|
|
| 1563 |
|
|
static int
|
| 1564 |
|
|
ip6_copyexthdr(mp, hdr, hlen)
|
| 1565 |
|
|
struct mbuf **mp;
|
| 1566 |
|
|
caddr_t hdr;
|
| 1567 |
|
|
int hlen;
|
| 1568 |
|
|
{
|
| 1569 |
|
|
struct mbuf *m;
|
| 1570 |
|
|
|
| 1571 |
|
|
if (hlen > MCLBYTES)
|
| 1572 |
|
|
return(ENOBUFS); /* XXX */
|
| 1573 |
|
|
|
| 1574 |
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
| 1575 |
|
|
if (!m)
|
| 1576 |
|
|
return(ENOBUFS);
|
| 1577 |
|
|
|
| 1578 |
|
|
if (hlen > MLEN) {
|
| 1579 |
|
|
MCLGET(m, M_DONTWAIT);
|
| 1580 |
|
|
if ((m->m_flags & M_EXT) == 0) {
|
| 1581 |
|
|
m_free(m);
|
| 1582 |
|
|
return(ENOBUFS);
|
| 1583 |
|
|
}
|
| 1584 |
|
|
}
|
| 1585 |
|
|
m->m_len = hlen;
|
| 1586 |
|
|
if (hdr)
|
| 1587 |
|
|
bcopy(hdr, mtod(m, caddr_t), hlen);
|
| 1588 |
|
|
|
| 1589 |
|
|
*mp = m;
|
| 1590 |
|
|
return(0);
|
| 1591 |
|
|
}
|
| 1592 |
|
|
|
| 1593 |
|
|
/*
|
| 1594 |
|
|
* Insert jumbo payload option.
|
| 1595 |
|
|
*/
|
| 1596 |
|
|
static int
|
| 1597 |
|
|
ip6_insert_jumboopt(exthdrs, plen)
|
| 1598 |
|
|
struct ip6_exthdrs *exthdrs;
|
| 1599 |
|
|
u_int32_t plen;
|
| 1600 |
|
|
{
|
| 1601 |
|
|
struct mbuf *mopt;
|
| 1602 |
|
|
u_char *optbuf;
|
| 1603 |
|
|
u_int32_t v;
|
| 1604 |
|
|
|
| 1605 |
|
|
#define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */
|
| 1606 |
|
|
|
| 1607 |
|
|
/*
|
| 1608 |
|
|
* If there is no hop-by-hop options header, allocate new one.
|
| 1609 |
|
|
* If there is one but it doesn't have enough space to store the
|
| 1610 |
|
|
* jumbo payload option, allocate a cluster to store the whole options.
|
| 1611 |
|
|
* Otherwise, use it to store the options.
|
| 1612 |
|
|
*/
|
| 1613 |
|
|
if (exthdrs->ip6e_hbh == 0) {
|
| 1614 |
|
|
MGET(mopt, M_DONTWAIT, MT_DATA);
|
| 1615 |
|
|
if (mopt == 0)
|
| 1616 |
|
|
return(ENOBUFS);
|
| 1617 |
|
|
mopt->m_len = JUMBOOPTLEN;
|
| 1618 |
|
|
optbuf = mtod(mopt, u_char *);
|
| 1619 |
|
|
optbuf[1] = 0; /* = ((JUMBOOPTLEN) >> 3) - 1 */
|
| 1620 |
|
|
exthdrs->ip6e_hbh = mopt;
|
| 1621 |
|
|
} else {
|
| 1622 |
|
|
struct ip6_hbh *hbh;
|
| 1623 |
|
|
|
| 1624 |
|
|
mopt = exthdrs->ip6e_hbh;
|
| 1625 |
|
|
if (M_TRAILINGSPACE(mopt) < JUMBOOPTLEN) {
|
| 1626 |
|
|
/*
|
| 1627 |
|
|
* XXX assumption:
|
| 1628 |
|
|
* - exthdrs->ip6e_hbh is not referenced from places
|
| 1629 |
|
|
* other than exthdrs.
|
| 1630 |
|
|
* - exthdrs->ip6e_hbh is not an mbuf chain.
|
| 1631 |
|
|
*/
|
| 1632 |
|
|
int oldoptlen = mopt->m_len;
|
| 1633 |
|
|
struct mbuf *n;
|
| 1634 |
|
|
|
| 1635 |
|
|
/*
|
| 1636 |
|
|
* XXX: give up if the whole (new) hbh header does
|
| 1637 |
|
|
* not fit even in an mbuf cluster.
|
| 1638 |
|
|
*/
|
| 1639 |
|
|
if (oldoptlen + JUMBOOPTLEN > MCLBYTES)
|
| 1640 |
|
|
return(ENOBUFS);
|
| 1641 |
|
|
|
| 1642 |
|
|
/*
|
| 1643 |
|
|
* As a consequence, we must always prepare a cluster
|
| 1644 |
|
|
* at this point.
|
| 1645 |
|
|
*/
|
| 1646 |
|
|
MGET(n, M_DONTWAIT, MT_DATA);
|
| 1647 |
|
|
if (n) {
|
| 1648 |
|
|
MCLGET(n, M_DONTWAIT);
|
| 1649 |
|
|
if ((n->m_flags & M_EXT) == 0) {
|
| 1650 |
|
|
m_freem(n);
|
| 1651 |
|
|
n = NULL;
|
| 1652 |
|
|
}
|
| 1653 |
|
|
}
|
| 1654 |
|
|
if (!n)
|
| 1655 |
|
|
return(ENOBUFS);
|
| 1656 |
|
|
n->m_len = oldoptlen + JUMBOOPTLEN;
|
| 1657 |
|
|
bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t),
|
| 1658 |
|
|
oldoptlen);
|
| 1659 |
|
|
optbuf = mtod(n, caddr_t) + oldoptlen;
|
| 1660 |
|
|
m_freem(mopt);
|
| 1661 |
|
|
mopt = exthdrs->ip6e_hbh = n;
|
| 1662 |
|
|
} else {
|
| 1663 |
|
|
optbuf = mtod(mopt, u_char *) + mopt->m_len;
|
| 1664 |
|
|
mopt->m_len += JUMBOOPTLEN;
|
| 1665 |
|
|
}
|
| 1666 |
|
|
optbuf[0] = IP6OPT_PADN;
|
| 1667 |
|
|
optbuf[1] = 1;
|
| 1668 |
|
|
|
| 1669 |
|
|
/*
|
| 1670 |
|
|
* Adjust the header length according to the pad and
|
| 1671 |
|
|
* the jumbo payload option.
|
| 1672 |
|
|
*/
|
| 1673 |
|
|
hbh = mtod(mopt, struct ip6_hbh *);
|
| 1674 |
|
|
hbh->ip6h_len += (JUMBOOPTLEN >> 3);
|
| 1675 |
|
|
}
|
| 1676 |
|
|
|
| 1677 |
|
|
/* fill in the option. */
|
| 1678 |
|
|
optbuf[2] = IP6OPT_JUMBO;
|
| 1679 |
|
|
optbuf[3] = 4;
|
| 1680 |
|
|
v = (u_int32_t)htonl(plen + JUMBOOPTLEN);
|
| 1681 |
|
|
bcopy(&v, &optbuf[4], sizeof(u_int32_t));
|
| 1682 |
|
|
|
| 1683 |
|
|
/* finally, adjust the packet header length */
|
| 1684 |
|
|
exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN;
|
| 1685 |
|
|
|
| 1686 |
|
|
return(0);
|
| 1687 |
|
|
#undef JUMBOOPTLEN
|
| 1688 |
|
|
}
|
| 1689 |
|
|
|
| 1690 |
|
|
/*
|
| 1691 |
|
|
* Insert fragment header and copy unfragmentable header portions.
|
| 1692 |
|
|
*/
|
| 1693 |
|
|
static int
|
| 1694 |
|
|
ip6_insertfraghdr(m0, m, hlen, frghdrp)
|
| 1695 |
|
|
struct mbuf *m0, *m;
|
| 1696 |
|
|
int hlen;
|
| 1697 |
|
|
struct ip6_frag **frghdrp;
|
| 1698 |
|
|
{
|
| 1699 |
|
|
struct mbuf *n, *mlast;
|
| 1700 |
|
|
|
| 1701 |
|
|
if (hlen > sizeof(struct ip6_hdr)) {
|
| 1702 |
|
|
n = m_copym(m0, sizeof(struct ip6_hdr),
|
| 1703 |
|
|
hlen - sizeof(struct ip6_hdr), M_DONTWAIT);
|
| 1704 |
|
|
if (n == 0)
|
| 1705 |
|
|
return(ENOBUFS);
|
| 1706 |
|
|
m->m_next = n;
|
| 1707 |
|
|
} else
|
| 1708 |
|
|
n = m;
|
| 1709 |
|
|
|
| 1710 |
|
|
/* Search for the last mbuf of unfragmentable part. */
|
| 1711 |
|
|
for (mlast = n; mlast->m_next; mlast = mlast->m_next)
|
| 1712 |
|
|
;
|
| 1713 |
|
|
|
| 1714 |
|
|
if ((mlast->m_flags & M_EXT) == 0 &&
|
| 1715 |
|
|
M_TRAILINGSPACE(mlast) >= sizeof(struct ip6_frag)) {
|
| 1716 |
|
|
/* use the trailing space of the last mbuf for the fragment hdr */
|
| 1717 |
|
|
*frghdrp =
|
| 1718 |
|
|
(struct ip6_frag *)(mtod(mlast, caddr_t) + mlast->m_len);
|
| 1719 |
|
|
mlast->m_len += sizeof(struct ip6_frag);
|
| 1720 |
|
|
m->m_pkthdr.len += sizeof(struct ip6_frag);
|
| 1721 |
|
|
} else {
|
| 1722 |
|
|
/* allocate a new mbuf for the fragment header */
|
| 1723 |
|
|
struct mbuf *mfrg;
|
| 1724 |
|
|
|
| 1725 |
|
|
MGET(mfrg, M_DONTWAIT, MT_DATA);
|
| 1726 |
|
|
if (mfrg == 0)
|
| 1727 |
|
|
return(ENOBUFS);
|
| 1728 |
|
|
mfrg->m_len = sizeof(struct ip6_frag);
|
| 1729 |
|
|
*frghdrp = mtod(mfrg, struct ip6_frag *);
|
| 1730 |
|
|
mlast->m_next = mfrg;
|
| 1731 |
|
|
}
|
| 1732 |
|
|
|
| 1733 |
|
|
return(0);
|
| 1734 |
|
|
}
|
| 1735 |
|
|
|
| 1736 |
|
|
static int
|
| 1737 |
|
|
ip6_getpmtu(ro_pmtu, ro, ifp, dst, mtup)
|
| 1738 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 1739 |
|
|
struct route *ro_pmtu, *ro;
|
| 1740 |
|
|
#else
|
| 1741 |
|
|
struct route_in6 *ro_pmtu, *ro;
|
| 1742 |
|
|
#endif
|
| 1743 |
|
|
struct ifnet *ifp;
|
| 1744 |
|
|
struct in6_addr *dst; /* XXX: should be sockaddr_in6 */
|
| 1745 |
|
|
u_long *mtup;
|
| 1746 |
|
|
{
|
| 1747 |
|
|
u_int32_t mtu = 0;
|
| 1748 |
|
|
int error = 0;
|
| 1749 |
|
|
|
| 1750 |
|
|
if (ro_pmtu != ro) {
|
| 1751 |
|
|
/* The first hop and the final destination may differ. */
|
| 1752 |
|
|
struct sockaddr_in6 *sa6_dst =
|
| 1753 |
|
|
(struct sockaddr_in6 *)&ro_pmtu->ro_dst;
|
| 1754 |
|
|
if (ro_pmtu->ro_rt && ((ro_pmtu->ro_rt->rt_flags & RTF_UP)
|
| 1755 |
|
|
== 0 ||
|
| 1756 |
|
|
!IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr,
|
| 1757 |
|
|
dst))) {
|
| 1758 |
|
|
RTFREE(ro_pmtu->ro_rt);
|
| 1759 |
|
|
ro_pmtu->ro_rt = (struct rtentry *)NULL;
|
| 1760 |
|
|
}
|
| 1761 |
|
|
if (ro_pmtu->ro_rt == NULL) {
|
| 1762 |
|
|
bzero(sa6_dst, sizeof(*sa6_dst));
|
| 1763 |
|
|
sa6_dst->sin6_family = AF_INET6;
|
| 1764 |
|
|
sa6_dst->sin6_len = sizeof(struct sockaddr_in6);
|
| 1765 |
|
|
sa6_dst->sin6_addr = *dst;
|
| 1766 |
|
|
|
| 1767 |
|
|
#ifdef __bsdi__ /* bsdi needs rtcalloc to clone a route. */
|
| 1768 |
|
|
rtcalloc((struct route *)ro_pmtu);
|
| 1769 |
|
|
#else
|
| 1770 |
|
|
rtalloc((struct route *)ro_pmtu);
|
| 1771 |
|
|
#endif
|
| 1772 |
|
|
}
|
| 1773 |
|
|
}
|
| 1774 |
|
|
if (ro_pmtu->ro_rt) {
|
| 1775 |
|
|
u_int32_t ifmtu;
|
| 1776 |
|
|
|
| 1777 |
|
|
if (ifp == NULL)
|
| 1778 |
|
|
ifp = ro_pmtu->ro_rt->rt_ifp;
|
| 1779 |
|
|
ifmtu = nd_ifinfo[ifp->if_index].linkmtu;
|
| 1780 |
|
|
mtu = ro_pmtu->ro_rt->rt_rmx.rmx_mtu;
|
| 1781 |
|
|
if (mtu > ifmtu || mtu == 0) {
|
| 1782 |
|
|
/*
|
| 1783 |
|
|
* The MTU on the route is larger than the MTU on
|
| 1784 |
|
|
* the interface! This shouldn't happen, unless the
|
| 1785 |
|
|
* MTU of the interface has been changed after the
|
| 1786 |
|
|
* interface was brought up. Change the MTU in the
|
| 1787 |
|
|
* route to match the interface MTU (as long as the
|
| 1788 |
|
|
* field isn't locked).
|
| 1789 |
|
|
*
|
| 1790 |
|
|
* if MTU on the route is 0, we need to fix the MTU.
|
| 1791 |
|
|
* this case happens with path MTU discovery timeouts.
|
| 1792 |
|
|
*/
|
| 1793 |
|
|
mtu = ifmtu;
|
| 1794 |
|
|
if ((ro_pmtu->ro_rt->rt_rmx.rmx_locks & RTV_MTU) == 0)
|
| 1795 |
|
|
ro_pmtu->ro_rt->rt_rmx.rmx_mtu = mtu; /* XXX */
|
| 1796 |
|
|
}
|
| 1797 |
|
|
} else if (ifp) {
|
| 1798 |
|
|
mtu = nd_ifinfo[ifp->if_index].linkmtu;
|
| 1799 |
|
|
} else
|
| 1800 |
|
|
error = EHOSTUNREACH; /* XXX */
|
| 1801 |
|
|
|
| 1802 |
|
|
*mtup = mtu;
|
| 1803 |
|
|
return(error);
|
| 1804 |
|
|
}
|
| 1805 |
|
|
|
| 1806 |
|
|
/*
|
| 1807 |
|
|
* IP6 socket option processing.
|
| 1808 |
|
|
*/
|
| 1809 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1810 |
|
|
int
|
| 1811 |
|
|
ip6_ctloutput(so, sopt)
|
| 1812 |
|
|
struct socket *so;
|
| 1813 |
|
|
struct sockopt *sopt;
|
| 1814 |
|
|
#else
|
| 1815 |
|
|
int
|
| 1816 |
|
|
ip6_ctloutput(op, so, level, optname, mp)
|
| 1817 |
|
|
int op;
|
| 1818 |
|
|
struct socket *so;
|
| 1819 |
|
|
int level, optname;
|
| 1820 |
|
|
struct mbuf **mp;
|
| 1821 |
|
|
#endif
|
| 1822 |
|
|
{
|
| 1823 |
|
|
int privileged, optdatalen;
|
| 1824 |
|
|
void *optdata;
|
| 1825 |
|
|
struct ip6_recvpktopts *rcvopts;
|
| 1826 |
|
|
#if defined(IPSEC) && defined(__OpenBSD__)
|
| 1827 |
|
|
struct proc *p = curproc; /* XXX */
|
| 1828 |
|
|
struct tdb *tdb;
|
| 1829 |
|
|
struct tdb_ident *tdbip, tdbi;
|
| 1830 |
|
|
int s;
|
| 1831 |
|
|
#endif
|
| 1832 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1833 |
|
|
struct inpcb *in6p = sotoinpcb(so);
|
| 1834 |
|
|
int error, optval;
|
| 1835 |
|
|
int level, op, optname;
|
| 1836 |
|
|
int optlen;
|
| 1837 |
|
|
struct proc *p;
|
| 1838 |
|
|
|
| 1839 |
|
|
if (!sopt) {
|
| 1840 |
|
|
panic("ip6_ctloutput: arg soopt is NULL");
|
| 1841 |
|
|
}
|
| 1842 |
|
|
level = sopt->sopt_level;
|
| 1843 |
|
|
op = sopt->sopt_dir;
|
| 1844 |
|
|
optname = sopt->sopt_name;
|
| 1845 |
|
|
optlen = sopt->sopt_valsize;
|
| 1846 |
|
|
p = sopt->sopt_p;
|
| 1847 |
|
|
#else
|
| 1848 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 1849 |
|
|
struct inpcb *inp = sotoinpcb(so);
|
| 1850 |
|
|
#define in6p inp
|
| 1851 |
|
|
#else /* !NRL */
|
| 1852 |
|
|
struct in6pcb *in6p = sotoin6pcb(so);
|
| 1853 |
|
|
#endif /* HAVE_NRL_INPCB */
|
| 1854 |
|
|
struct mbuf *m = *mp;
|
| 1855 |
|
|
int error, optval;
|
| 1856 |
|
|
int optlen;
|
| 1857 |
|
|
#if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 1858 |
|
|
struct proc *p = curproc; /* XXX */
|
| 1859 |
|
|
#endif
|
| 1860 |
|
|
|
| 1861 |
|
|
optlen = m ? m->m_len : 0;
|
| 1862 |
|
|
#endif /* FreeBSD >= 3 */
|
| 1863 |
|
|
error = optval = 0;
|
| 1864 |
|
|
privileged = 1;
|
| 1865 |
|
|
|
| 1866 |
|
|
rcvopts = in6p->in6p_inputopts;
|
| 1867 |
|
|
|
| 1868 |
|
|
if (level == IPPROTO_IPV6) {
|
| 1869 |
|
|
switch (op) {
|
| 1870 |
|
|
|
| 1871 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1872 |
|
|
case SOPT_SET:
|
| 1873 |
|
|
#else
|
| 1874 |
|
|
case PRCO_SETOPT:
|
| 1875 |
|
|
#endif
|
| 1876 |
|
|
switch (optname) {
|
| 1877 |
|
|
case IPV6_2292PKTOPTIONS:
|
| 1878 |
|
|
#ifdef IPV6_PKTOPTIONS
|
| 1879 |
|
|
case IPV6_PKTOPTIONS:
|
| 1880 |
|
|
#endif
|
| 1881 |
|
|
{
|
| 1882 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1883 |
|
|
struct mbuf *m;
|
| 1884 |
|
|
|
| 1885 |
|
|
error = soopt_getm(sopt, &m); /* XXX */
|
| 1886 |
|
|
if (error)
|
| 1887 |
|
|
break;
|
| 1888 |
|
|
error = soopt_mcopyin(sopt, m); /* XXX */
|
| 1889 |
|
|
if (error)
|
| 1890 |
|
|
break;
|
| 1891 |
|
|
error = ip6_pcbopts(&in6p->in6p_outputopts,
|
| 1892 |
|
|
m, so, sopt);
|
| 1893 |
|
|
m_freem(m); /* XXX */
|
| 1894 |
|
|
#else
|
| 1895 |
|
|
error = ip6_pcbopts(&in6p->in6p_outputopts,
|
| 1896 |
|
|
m, so);
|
| 1897 |
|
|
#endif /* FreeBSD >= 3 */
|
| 1898 |
|
|
break;
|
| 1899 |
|
|
}
|
| 1900 |
|
|
|
| 1901 |
|
|
/*
|
| 1902 |
|
|
* Use of some Hop-by-Hop options or some
|
| 1903 |
|
|
* Destination options, might require special
|
| 1904 |
|
|
* privilege. That is, normal applications
|
| 1905 |
|
|
* (without special privilege) might be forbidden
|
| 1906 |
|
|
* from setting certain options in outgoing packets,
|
| 1907 |
|
|
* and might never see certain options in received
|
| 1908 |
|
|
* packets. [RFC 2292 Section 6]
|
| 1909 |
|
|
* KAME specific note:
|
| 1910 |
|
|
* KAME prevents non-privileged users from sending or
|
| 1911 |
|
|
* receiving ANY hbh/dst options in order to avoid
|
| 1912 |
|
|
* overhead of parsing options in the kernel.
|
| 1913 |
|
|
*/
|
| 1914 |
|
|
case IPV6_RECVHOPOPTS:
|
| 1915 |
|
|
case IPV6_RECVDSTOPTS:
|
| 1916 |
|
|
case IPV6_RECVRTHDRDSTOPTS:
|
| 1917 |
|
|
/* fall through */
|
| 1918 |
|
|
case IPV6_UNICAST_HOPS:
|
| 1919 |
|
|
case IPV6_HOPLIMIT:
|
| 1920 |
|
|
case IPV6_FAITH:
|
| 1921 |
|
|
|
| 1922 |
|
|
case IPV6_RECVPKTINFO:
|
| 1923 |
|
|
case IPV6_RECVHOPLIMIT:
|
| 1924 |
|
|
case IPV6_RECVRTHDR:
|
| 1925 |
|
|
case IPV6_RECVPATHMTU:
|
| 1926 |
|
|
case IPV6_RECVTCLASS:
|
| 1927 |
|
|
case IPV6_V6ONLY:
|
| 1928 |
|
|
case IPV6_AUTOFLOWLABEL:
|
| 1929 |
|
|
if (optlen != sizeof(int)) {
|
| 1930 |
|
|
error = EINVAL;
|
| 1931 |
|
|
break;
|
| 1932 |
|
|
}
|
| 1933 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1934 |
|
|
error = sooptcopyin(sopt, &optval,
|
| 1935 |
|
|
sizeof optval, sizeof optval);
|
| 1936 |
|
|
if (error)
|
| 1937 |
|
|
break;
|
| 1938 |
|
|
#else
|
| 1939 |
|
|
optval = *mtod(m, int *);
|
| 1940 |
|
|
#endif
|
| 1941 |
|
|
switch (optname) {
|
| 1942 |
|
|
|
| 1943 |
|
|
case IPV6_UNICAST_HOPS:
|
| 1944 |
|
|
if (optval < -1 || optval >= 256)
|
| 1945 |
|
|
error = EINVAL;
|
| 1946 |
|
|
else {
|
| 1947 |
|
|
/* -1 = kernel default */
|
| 1948 |
|
|
in6p->in6p_hops = optval;
|
| 1949 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 1950 |
|
|
if ((in6p->in6p_vflag &
|
| 1951 |
|
|
INP_IPV4) != 0)
|
| 1952 |
|
|
in6p->inp_ip_ttl = optval;
|
| 1953 |
|
|
#endif
|
| 1954 |
|
|
}
|
| 1955 |
|
|
break;
|
| 1956 |
|
|
#define OPTSET(bit) \
|
| 1957 |
|
|
do { \
|
| 1958 |
|
|
if (optval) \
|
| 1959 |
|
|
in6p->in6p_flags |= (bit); \
|
| 1960 |
|
|
else \
|
| 1961 |
|
|
in6p->in6p_flags &= ~(bit); \
|
| 1962 |
|
|
} while (0)
|
| 1963 |
|
|
#define OPTSET2292(bit) \
|
| 1964 |
|
|
do { \
|
| 1965 |
|
|
in6p->in6p_flags |= IN6P_RFC2292; \
|
| 1966 |
|
|
if (optval) \
|
| 1967 |
|
|
in6p->in6p_flags |= (bit); \
|
| 1968 |
|
|
else \
|
| 1969 |
|
|
in6p->in6p_flags &= ~(bit); \
|
| 1970 |
|
|
} while (0)
|
| 1971 |
|
|
#define OPTBIT(bit) (in6p->in6p_flags & (bit) ? 1 : 0)
|
| 1972 |
|
|
|
| 1973 |
|
|
case IPV6_RECVPKTINFO:
|
| 1974 |
|
|
/* cannot mix with RFC2292 */
|
| 1975 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 1976 |
|
|
error = EINVAL;
|
| 1977 |
|
|
break;
|
| 1978 |
|
|
}
|
| 1979 |
|
|
OPTSET(IN6P_PKTINFO);
|
| 1980 |
|
|
if (OPTBIT(IN6P_PKTINFO) == 0)
|
| 1981 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVPKTINFO);
|
| 1982 |
|
|
break;
|
| 1983 |
|
|
|
| 1984 |
|
|
case IPV6_HOPLIMIT:
|
| 1985 |
|
|
{
|
| 1986 |
|
|
struct ip6_pktopts **optp;
|
| 1987 |
|
|
|
| 1988 |
|
|
/* cannot mix with RFC2292 */
|
| 1989 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 1990 |
|
|
error = EINVAL;
|
| 1991 |
|
|
break;
|
| 1992 |
|
|
}
|
| 1993 |
|
|
optp = &in6p->in6p_outputopts;
|
| 1994 |
|
|
error = ip6_pcbopt(IPV6_HOPLIMIT,
|
| 1995 |
|
|
(u_char *)&optval,
|
| 1996 |
|
|
sizeof(optval),
|
| 1997 |
|
|
optp,
|
| 1998 |
|
|
privileged);
|
| 1999 |
|
|
break;
|
| 2000 |
|
|
}
|
| 2001 |
|
|
|
| 2002 |
|
|
case IPV6_RECVHOPLIMIT:
|
| 2003 |
|
|
/* cannot mix with RFC2292 */
|
| 2004 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2005 |
|
|
error = EINVAL;
|
| 2006 |
|
|
break;
|
| 2007 |
|
|
}
|
| 2008 |
|
|
OPTSET(IN6P_HOPLIMIT);
|
| 2009 |
|
|
if (OPTBIT(IN6P_HOPLIMIT) == 0)
|
| 2010 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVHOPLIMIT);
|
| 2011 |
|
|
break;
|
| 2012 |
|
|
|
| 2013 |
|
|
case IPV6_RECVHOPOPTS:
|
| 2014 |
|
|
/* cannot mix with RFC2292 */
|
| 2015 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2016 |
|
|
error = EINVAL;
|
| 2017 |
|
|
break;
|
| 2018 |
|
|
}
|
| 2019 |
|
|
OPTSET(IN6P_HOPOPTS);
|
| 2020 |
|
|
if (OPTBIT(IN6P_HOPOPTS) == 0)
|
| 2021 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVHOPOPTS);
|
| 2022 |
|
|
break;
|
| 2023 |
|
|
|
| 2024 |
|
|
case IPV6_RECVDSTOPTS:
|
| 2025 |
|
|
/* cannot mix with RFC2292 */
|
| 2026 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2027 |
|
|
error = EINVAL;
|
| 2028 |
|
|
break;
|
| 2029 |
|
|
}
|
| 2030 |
|
|
OPTSET(IN6P_DSTOPTS);
|
| 2031 |
|
|
if (OPTBIT(IN6P_DSTOPTS) == 0)
|
| 2032 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVDSTOPTS);
|
| 2033 |
|
|
break;
|
| 2034 |
|
|
|
| 2035 |
|
|
case IPV6_RECVRTHDRDSTOPTS:
|
| 2036 |
|
|
/* cannot mix with RFC2292 */
|
| 2037 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2038 |
|
|
error = EINVAL;
|
| 2039 |
|
|
break;
|
| 2040 |
|
|
}
|
| 2041 |
|
|
OPTSET(IN6P_RTHDRDSTOPTS);
|
| 2042 |
|
|
if (OPTBIT(IN6P_RTHDRDSTOPTS) == 0)
|
| 2043 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVRTHDRDSTOPTS);
|
| 2044 |
|
|
break;
|
| 2045 |
|
|
|
| 2046 |
|
|
case IPV6_RECVRTHDR:
|
| 2047 |
|
|
/* cannot mix with RFC2292 */
|
| 2048 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2049 |
|
|
error = EINVAL;
|
| 2050 |
|
|
break;
|
| 2051 |
|
|
}
|
| 2052 |
|
|
OPTSET(IN6P_RTHDR);
|
| 2053 |
|
|
if (OPTBIT(IN6P_RTHDR) == 0)
|
| 2054 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVRTHDR);
|
| 2055 |
|
|
break;
|
| 2056 |
|
|
|
| 2057 |
|
|
case IPV6_FAITH:
|
| 2058 |
|
|
OPTSET(IN6P_FAITH);
|
| 2059 |
|
|
break;
|
| 2060 |
|
|
|
| 2061 |
|
|
case IPV6_RECVPATHMTU:
|
| 2062 |
|
|
OPTSET(IN6P_MTU);
|
| 2063 |
|
|
break;
|
| 2064 |
|
|
|
| 2065 |
|
|
case IPV6_V6ONLY:
|
| 2066 |
|
|
/*
|
| 2067 |
|
|
* make setsockopt(IPV6_V6ONLY)
|
| 2068 |
|
|
* available only prior to bind(2).
|
| 2069 |
|
|
* see ipng mailing list, Jun 22 2001.
|
| 2070 |
|
|
*/
|
| 2071 |
|
|
if (in6p->in6p_lport ||
|
| 2072 |
|
|
!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr))
|
| 2073 |
|
|
{
|
| 2074 |
|
|
error = EINVAL;
|
| 2075 |
|
|
break;
|
| 2076 |
|
|
}
|
| 2077 |
|
|
#ifdef __NetBSD__
|
| 2078 |
|
|
#ifdef INET6_BINDV6ONLY
|
| 2079 |
|
|
if (!optval)
|
| 2080 |
|
|
error = EINVAL;
|
| 2081 |
|
|
#else
|
| 2082 |
|
|
OPTSET(IN6P_IPV6_V6ONLY);
|
| 2083 |
|
|
#endif
|
| 2084 |
|
|
#elif (defined(__FreeBSD__) && __FreeBSD__ >= 3) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
|
| 2085 |
|
|
OPTSET(IN6P_IPV6_V6ONLY);
|
| 2086 |
|
|
#else
|
| 2087 |
|
|
if ((ip6_v6only && optval) ||
|
| 2088 |
|
|
(!ip6_v6only && !optval))
|
| 2089 |
|
|
error = 0;
|
| 2090 |
|
|
else
|
| 2091 |
|
|
error = EINVAL;
|
| 2092 |
|
|
#endif
|
| 2093 |
|
|
break;
|
| 2094 |
|
|
case IPV6_RECVTCLASS:
|
| 2095 |
|
|
/* cannot mix with RFC2292 XXX */
|
| 2096 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2097 |
|
|
error = EINVAL;
|
| 2098 |
|
|
break;
|
| 2099 |
|
|
}
|
| 2100 |
|
|
OPTSET(IN6P_TCLASS);
|
| 2101 |
|
|
break;
|
| 2102 |
|
|
case IPV6_AUTOFLOWLABEL:
|
| 2103 |
|
|
OPTSET(IN6P_AUTOFLOWLABEL);
|
| 2104 |
|
|
break;
|
| 2105 |
|
|
|
| 2106 |
|
|
}
|
| 2107 |
|
|
break;
|
| 2108 |
|
|
|
| 2109 |
|
|
case IPV6_OTCLASS:
|
| 2110 |
|
|
{
|
| 2111 |
|
|
struct ip6_pktopts **optp;
|
| 2112 |
|
|
u_int8_t tclass;
|
| 2113 |
|
|
|
| 2114 |
|
|
if (optlen != sizeof(tclass)) {
|
| 2115 |
|
|
error = EINVAL;
|
| 2116 |
|
|
break;
|
| 2117 |
|
|
}
|
| 2118 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2119 |
|
|
error = sooptcopyin(sopt, &tclass,
|
| 2120 |
|
|
sizeof tclass, sizeof tclass);
|
| 2121 |
|
|
if (error)
|
| 2122 |
|
|
break;
|
| 2123 |
|
|
#else
|
| 2124 |
|
|
tclass = *mtod(m, u_int8_t *);
|
| 2125 |
|
|
#endif
|
| 2126 |
|
|
optp = &in6p->in6p_outputopts;
|
| 2127 |
|
|
error = ip6_pcbopt(optname,
|
| 2128 |
|
|
(u_char *)&tclass,
|
| 2129 |
|
|
sizeof(tclass),
|
| 2130 |
|
|
optp,
|
| 2131 |
|
|
privileged);
|
| 2132 |
|
|
break;
|
| 2133 |
|
|
}
|
| 2134 |
|
|
|
| 2135 |
|
|
case IPV6_TCLASS:
|
| 2136 |
|
|
case IPV6_DONTFRAG:
|
| 2137 |
|
|
case IPV6_USE_MIN_MTU:
|
| 2138 |
|
|
if (optlen != sizeof(optval)) {
|
| 2139 |
|
|
error = EINVAL;
|
| 2140 |
|
|
break;
|
| 2141 |
|
|
}
|
| 2142 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2143 |
|
|
error = sooptcopyin(sopt, &optval,
|
| 2144 |
|
|
sizeof optval, sizeof optval);
|
| 2145 |
|
|
if (error)
|
| 2146 |
|
|
break;
|
| 2147 |
|
|
#else
|
| 2148 |
|
|
optval = *mtod(m, int *);
|
| 2149 |
|
|
#endif
|
| 2150 |
|
|
{
|
| 2151 |
|
|
struct ip6_pktopts **optp;
|
| 2152 |
|
|
optp = &in6p->in6p_outputopts;
|
| 2153 |
|
|
error = ip6_pcbopt(optname,
|
| 2154 |
|
|
(u_char *)&optval,
|
| 2155 |
|
|
sizeof(optval),
|
| 2156 |
|
|
optp,
|
| 2157 |
|
|
privileged);
|
| 2158 |
|
|
break;
|
| 2159 |
|
|
}
|
| 2160 |
|
|
|
| 2161 |
|
|
case IPV6_2292PKTINFO:
|
| 2162 |
|
|
case IPV6_2292HOPLIMIT:
|
| 2163 |
|
|
case IPV6_2292HOPOPTS:
|
| 2164 |
|
|
case IPV6_2292DSTOPTS:
|
| 2165 |
|
|
case IPV6_2292RTHDR:
|
| 2166 |
|
|
/* RFC 2292 */
|
| 2167 |
|
|
if (optlen != sizeof(int)) {
|
| 2168 |
|
|
error = EINVAL;
|
| 2169 |
|
|
break;
|
| 2170 |
|
|
}
|
| 2171 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2172 |
|
|
error = sooptcopyin(sopt, &optval,
|
| 2173 |
|
|
sizeof optval, sizeof optval);
|
| 2174 |
|
|
if (error)
|
| 2175 |
|
|
break;
|
| 2176 |
|
|
#else
|
| 2177 |
|
|
optval = *mtod(m, int *);
|
| 2178 |
|
|
#endif
|
| 2179 |
|
|
switch (optname) {
|
| 2180 |
|
|
case IPV6_2292PKTINFO:
|
| 2181 |
|
|
OPTSET2292(IN6P_PKTINFO);
|
| 2182 |
|
|
if (OPTBIT(IN6P_PKTINFO) == 0)
|
| 2183 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVPKTINFO);
|
| 2184 |
|
|
break;
|
| 2185 |
|
|
case IPV6_2292HOPLIMIT:
|
| 2186 |
|
|
OPTSET2292(IN6P_HOPLIMIT);
|
| 2187 |
|
|
if (OPTBIT(IN6P_HOPLIMIT) == 0)
|
| 2188 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVHOPLIMIT);
|
| 2189 |
|
|
break;
|
| 2190 |
|
|
case IPV6_2292HOPOPTS:
|
| 2191 |
|
|
/*
|
| 2192 |
|
|
* Check super-user privilege.
|
| 2193 |
|
|
* See comments for IPV6_RECVHOPOPTS.
|
| 2194 |
|
|
*/
|
| 2195 |
|
|
OPTSET2292(IN6P_HOPOPTS);
|
| 2196 |
|
|
if (OPTBIT(IN6P_HOPOPTS) == 0)
|
| 2197 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVHOPOPTS);
|
| 2198 |
|
|
break;
|
| 2199 |
|
|
case IPV6_2292DSTOPTS:
|
| 2200 |
|
|
OPTSET2292(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */
|
| 2201 |
|
|
if (OPTBIT(IN6P_DSTOPTS) == 0) {
|
| 2202 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVDSTOPTS);
|
| 2203 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVRTHDRDSTOPTS);
|
| 2204 |
|
|
}
|
| 2205 |
|
|
break;
|
| 2206 |
|
|
case IPV6_2292RTHDR:
|
| 2207 |
|
|
OPTSET2292(IN6P_RTHDR);
|
| 2208 |
|
|
if (OPTBIT(IN6P_RTHDR) == 0)
|
| 2209 |
|
|
ip6_reset_rcvopt(rcvopts, IPV6_RECVRTHDR);
|
| 2210 |
|
|
break;
|
| 2211 |
|
|
}
|
| 2212 |
|
|
break;
|
| 2213 |
|
|
case IPV6_PKTINFO:
|
| 2214 |
|
|
case IPV6_HOPOPTS:
|
| 2215 |
|
|
case IPV6_RTHDR:
|
| 2216 |
|
|
case IPV6_DSTOPTS:
|
| 2217 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 2218 |
|
|
case IPV6_NEXTHOP:
|
| 2219 |
|
|
{
|
| 2220 |
|
|
/* new advanced API (2292bis) */
|
| 2221 |
|
|
u_char *optbuf;
|
| 2222 |
|
|
int optlen;
|
| 2223 |
|
|
struct ip6_pktopts **optp;
|
| 2224 |
|
|
|
| 2225 |
|
|
/* cannot mix with RFC2292 */
|
| 2226 |
|
|
if (OPTBIT(IN6P_RFC2292)) {
|
| 2227 |
|
|
error = EINVAL;
|
| 2228 |
|
|
break;
|
| 2229 |
|
|
}
|
| 2230 |
|
|
|
| 2231 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2232 |
|
|
optbuf = sopt->sopt_val;
|
| 2233 |
|
|
optlen = sopt->sopt_valsize;
|
| 2234 |
|
|
#else /* !fbsd3 */
|
| 2235 |
|
|
if (m && m->m_next) {
|
| 2236 |
|
|
error = EINVAL; /* XXX */
|
| 2237 |
|
|
break;
|
| 2238 |
|
|
}
|
| 2239 |
|
|
if (m) {
|
| 2240 |
|
|
optbuf = mtod(m, u_char *);
|
| 2241 |
|
|
optlen = m->m_len;
|
| 2242 |
|
|
} else {
|
| 2243 |
|
|
optbuf = NULL;
|
| 2244 |
|
|
optlen = 0;
|
| 2245 |
|
|
}
|
| 2246 |
|
|
#endif
|
| 2247 |
|
|
optp = &in6p->in6p_outputopts;
|
| 2248 |
|
|
error = ip6_pcbopt(optname,
|
| 2249 |
|
|
optbuf, optlen,
|
| 2250 |
|
|
optp, privileged);
|
| 2251 |
|
|
break;
|
| 2252 |
|
|
}
|
| 2253 |
|
|
#undef OPTSET
|
| 2254 |
|
|
|
| 2255 |
|
|
case IPV6_MULTICAST_IF:
|
| 2256 |
|
|
case IPV6_MULTICAST_HOPS:
|
| 2257 |
|
|
case IPV6_MULTICAST_LOOP:
|
| 2258 |
|
|
case IPV6_JOIN_GROUP:
|
| 2259 |
|
|
case IPV6_LEAVE_GROUP:
|
| 2260 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2261 |
|
|
{
|
| 2262 |
|
|
struct mbuf *m;
|
| 2263 |
|
|
if (sopt->sopt_valsize > MLEN) {
|
| 2264 |
|
|
error = EMSGSIZE;
|
| 2265 |
|
|
break;
|
| 2266 |
|
|
}
|
| 2267 |
|
|
/* XXX */
|
| 2268 |
|
|
MGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT, MT_HEADER);
|
| 2269 |
|
|
if (m == 0) {
|
| 2270 |
|
|
error = ENOBUFS;
|
| 2271 |
|
|
break;
|
| 2272 |
|
|
}
|
| 2273 |
|
|
m->m_len = sopt->sopt_valsize;
|
| 2274 |
|
|
error = sooptcopyin(sopt, mtod(m, char *),
|
| 2275 |
|
|
m->m_len, m->m_len);
|
| 2276 |
|
|
error = ip6_setmoptions(sopt->sopt_name,
|
| 2277 |
|
|
&in6p->in6p_moptions,
|
| 2278 |
|
|
m);
|
| 2279 |
|
|
(void)m_free(m);
|
| 2280 |
|
|
}
|
| 2281 |
|
|
#else
|
| 2282 |
|
|
error = ip6_setmoptions(optname,
|
| 2283 |
|
|
&in6p->in6p_moptions,
|
| 2284 |
|
|
m);
|
| 2285 |
|
|
#if defined(__bsdi__) && _BSDI_VERSION >= 199802
|
| 2286 |
|
|
if (in6p->in6p_moptions != NULL)
|
| 2287 |
|
|
in6p->in6p_flags |= INP_IPV6_MCAST; /* XXX */
|
| 2288 |
|
|
#endif
|
| 2289 |
|
|
#endif
|
| 2290 |
|
|
break;
|
| 2291 |
|
|
|
| 2292 |
|
|
#ifndef __bsdi__
|
| 2293 |
|
|
case IPV6_PORTRANGE:
|
| 2294 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2295 |
|
|
error = sooptcopyin(sopt, &optval,
|
| 2296 |
|
|
sizeof optval, sizeof optval);
|
| 2297 |
|
|
if (error)
|
| 2298 |
|
|
break;
|
| 2299 |
|
|
#else
|
| 2300 |
|
|
optval = *mtod(m, int *);
|
| 2301 |
|
|
#endif
|
| 2302 |
|
|
|
| 2303 |
|
|
switch (optval) {
|
| 2304 |
|
|
case IPV6_PORTRANGE_DEFAULT:
|
| 2305 |
|
|
in6p->in6p_flags &= ~(IN6P_LOWPORT);
|
| 2306 |
|
|
in6p->in6p_flags &= ~(IN6P_HIGHPORT);
|
| 2307 |
|
|
break;
|
| 2308 |
|
|
|
| 2309 |
|
|
case IPV6_PORTRANGE_HIGH:
|
| 2310 |
|
|
in6p->in6p_flags &= ~(IN6P_LOWPORT);
|
| 2311 |
|
|
in6p->in6p_flags |= IN6P_HIGHPORT;
|
| 2312 |
|
|
break;
|
| 2313 |
|
|
|
| 2314 |
|
|
case IPV6_PORTRANGE_LOW:
|
| 2315 |
|
|
in6p->in6p_flags &= ~(IN6P_HIGHPORT);
|
| 2316 |
|
|
in6p->in6p_flags |= IN6P_LOWPORT;
|
| 2317 |
|
|
break;
|
| 2318 |
|
|
|
| 2319 |
|
|
default:
|
| 2320 |
|
|
error = EINVAL;
|
| 2321 |
|
|
break;
|
| 2322 |
|
|
}
|
| 2323 |
|
|
break;
|
| 2324 |
|
|
#endif
|
| 2325 |
|
|
|
| 2326 |
|
|
#ifdef __OpenBSD__
|
| 2327 |
|
|
case IPSEC6_OUTSA:
|
| 2328 |
|
|
#ifndef IPSEC
|
| 2329 |
|
|
error = EINVAL;
|
| 2330 |
|
|
#else
|
| 2331 |
|
|
s = spltdb();
|
| 2332 |
|
|
if (m == 0 || m->m_len != sizeof(struct tdb_ident)) {
|
| 2333 |
|
|
error = EINVAL;
|
| 2334 |
|
|
} else {
|
| 2335 |
|
|
tdbip = mtod(m, struct tdb_ident *);
|
| 2336 |
|
|
tdb = gettdb(tdbip->spi, &tdbip->dst,
|
| 2337 |
|
|
tdbip->proto);
|
| 2338 |
|
|
if (tdb == NULL)
|
| 2339 |
|
|
error = ESRCH;
|
| 2340 |
|
|
else
|
| 2341 |
|
|
tdb_add_inp(tdb, inp, 0);
|
| 2342 |
|
|
}
|
| 2343 |
|
|
splx(s);
|
| 2344 |
|
|
#endif
|
| 2345 |
|
|
break;
|
| 2346 |
|
|
|
| 2347 |
|
|
case IPV6_AUTH_LEVEL:
|
| 2348 |
|
|
case IPV6_ESP_TRANS_LEVEL:
|
| 2349 |
|
|
case IPV6_ESP_NETWORK_LEVEL:
|
| 2350 |
|
|
case IPV6_IPCOMP_LEVEL:
|
| 2351 |
|
|
#ifndef IPSEC
|
| 2352 |
|
|
error = EINVAL;
|
| 2353 |
|
|
#else
|
| 2354 |
|
|
if (m == 0 || m->m_len != sizeof(int)) {
|
| 2355 |
|
|
error = EINVAL;
|
| 2356 |
|
|
break;
|
| 2357 |
|
|
}
|
| 2358 |
|
|
optval = *mtod(m, int *);
|
| 2359 |
|
|
|
| 2360 |
|
|
if (optval < IPSEC_LEVEL_BYPASS ||
|
| 2361 |
|
|
optval > IPSEC_LEVEL_UNIQUE) {
|
| 2362 |
|
|
error = EINVAL;
|
| 2363 |
|
|
break;
|
| 2364 |
|
|
}
|
| 2365 |
|
|
|
| 2366 |
|
|
switch (optname) {
|
| 2367 |
|
|
case IPV6_AUTH_LEVEL:
|
| 2368 |
|
|
inp->inp_seclevel[SL_AUTH] = optval;
|
| 2369 |
|
|
break;
|
| 2370 |
|
|
|
| 2371 |
|
|
case IPV6_ESP_TRANS_LEVEL:
|
| 2372 |
|
|
inp->inp_seclevel[SL_ESP_TRANS] = optval;
|
| 2373 |
|
|
break;
|
| 2374 |
|
|
|
| 2375 |
|
|
case IPV6_ESP_NETWORK_LEVEL:
|
| 2376 |
|
|
inp->inp_seclevel[SL_ESP_NETWORK] = optval;
|
| 2377 |
|
|
break;
|
| 2378 |
|
|
|
| 2379 |
|
|
case IPV6_IPCOMP_LEVEL:
|
| 2380 |
|
|
inp->inp_seclevel[SL_IPCOMP] = optval;
|
| 2381 |
|
|
break;
|
| 2382 |
|
|
}
|
| 2383 |
|
|
if (!error)
|
| 2384 |
|
|
inp->inp_secrequire = get_sa_require(inp);
|
| 2385 |
|
|
#endif
|
| 2386 |
|
|
break;
|
| 2387 |
|
|
#endif /* OpenBSD */
|
| 2388 |
|
|
|
| 2389 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 2390 |
|
|
case IPV6_IPSEC_POLICY:
|
| 2391 |
|
|
{
|
| 2392 |
|
|
caddr_t req = NULL;
|
| 2393 |
|
|
size_t len = 0;
|
| 2394 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2395 |
|
|
struct mbuf *m;
|
| 2396 |
|
|
#endif
|
| 2397 |
|
|
|
| 2398 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2399 |
|
|
if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
|
| 2400 |
|
|
break;
|
| 2401 |
|
|
if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
|
| 2402 |
|
|
break;
|
| 2403 |
|
|
#endif
|
| 2404 |
|
|
if (m) {
|
| 2405 |
|
|
req = mtod(m, caddr_t);
|
| 2406 |
|
|
len = m->m_len;
|
| 2407 |
|
|
}
|
| 2408 |
|
|
error = ipsec6_set_policy(in6p, optname, req,
|
| 2409 |
|
|
len, privileged);
|
| 2410 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2411 |
|
|
m_freem(m);
|
| 2412 |
|
|
#endif
|
| 2413 |
|
|
}
|
| 2414 |
|
|
break;
|
| 2415 |
|
|
#endif /* KAME IPSEC */
|
| 2416 |
|
|
|
| 2417 |
|
|
#if defined(IPV6FIREWALL) || (defined(__FreeBSD__) && __FreeBSD__ >= 4)
|
| 2418 |
|
|
case IPV6_FW_ADD:
|
| 2419 |
|
|
case IPV6_FW_DEL:
|
| 2420 |
|
|
case IPV6_FW_FLUSH:
|
| 2421 |
|
|
case IPV6_FW_ZERO:
|
| 2422 |
|
|
{
|
| 2423 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2424 |
|
|
struct mbuf *m;
|
| 2425 |
|
|
struct mbuf **mp = &m;
|
| 2426 |
|
|
#endif
|
| 2427 |
|
|
|
| 2428 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2429 |
|
|
if (ip6_fw_ctl_ptr == NULL)
|
| 2430 |
|
|
return EINVAL;
|
| 2431 |
|
|
/* XXX */
|
| 2432 |
|
|
if ((error = soopt_getm(sopt, &m)) != 0)
|
| 2433 |
|
|
break;
|
| 2434 |
|
|
/* XXX */
|
| 2435 |
|
|
if ((error = soopt_mcopyin(sopt, m)) != 0)
|
| 2436 |
|
|
break;
|
| 2437 |
|
|
#else
|
| 2438 |
|
|
if (ip6_fw_ctl_ptr == NULL) {
|
| 2439 |
|
|
if (m) (void)m_free(m);
|
| 2440 |
|
|
return EINVAL;
|
| 2441 |
|
|
}
|
| 2442 |
|
|
#endif
|
| 2443 |
|
|
error = (*ip6_fw_ctl_ptr)(optname, mp);
|
| 2444 |
|
|
m = *mp;
|
| 2445 |
|
|
}
|
| 2446 |
|
|
break;
|
| 2447 |
|
|
#endif
|
| 2448 |
|
|
|
| 2449 |
|
|
default:
|
| 2450 |
|
|
error = ENOPROTOOPT;
|
| 2451 |
|
|
break;
|
| 2452 |
|
|
}
|
| 2453 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2454 |
|
|
if (m)
|
| 2455 |
|
|
(void)m_free(m);
|
| 2456 |
|
|
#endif
|
| 2457 |
|
|
break;
|
| 2458 |
|
|
|
| 2459 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2460 |
|
|
case SOPT_GET:
|
| 2461 |
|
|
#else
|
| 2462 |
|
|
case PRCO_GETOPT:
|
| 2463 |
|
|
#endif
|
| 2464 |
|
|
switch (optname) {
|
| 2465 |
|
|
|
| 2466 |
|
|
case IPV6_2292PKTOPTIONS:
|
| 2467 |
|
|
#ifdef IPV6_PKTOPTIONS
|
| 2468 |
|
|
case IPV6_PKTOPTIONS:
|
| 2469 |
|
|
#endif
|
| 2470 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2471 |
|
|
if (in6p->in6p_inputopts &&
|
| 2472 |
|
|
in6p->in6p_inputopts->head) {
|
| 2473 |
|
|
struct mbuf *m;
|
| 2474 |
|
|
m = m_copym(in6p->in6p_inputopts->head,
|
| 2475 |
|
|
0, M_COPYALL, M_WAIT);
|
| 2476 |
|
|
error = soopt_mcopyout(sopt, m);
|
| 2477 |
|
|
if (error == 0)
|
| 2478 |
|
|
m_freem(m);
|
| 2479 |
|
|
} else
|
| 2480 |
|
|
sopt->sopt_valsize = 0;
|
| 2481 |
|
|
#else
|
| 2482 |
|
|
if (in6p->in6p_inputopts &&
|
| 2483 |
|
|
in6p->in6p_inputopts->head) {
|
| 2484 |
|
|
*mp = m_copym(in6p->in6p_inputopts->head,
|
| 2485 |
|
|
0, M_COPYALL, M_WAIT);
|
| 2486 |
|
|
} else {
|
| 2487 |
|
|
*mp = m_get(M_WAIT, MT_SOOPTS);
|
| 2488 |
|
|
(*mp)->m_len = 0;
|
| 2489 |
|
|
}
|
| 2490 |
|
|
#endif
|
| 2491 |
|
|
break;
|
| 2492 |
|
|
|
| 2493 |
|
|
case IPV6_RECVHOPOPTS:
|
| 2494 |
|
|
case IPV6_RECVDSTOPTS:
|
| 2495 |
|
|
case IPV6_RECVRTHDRDSTOPTS:
|
| 2496 |
|
|
case IPV6_UNICAST_HOPS:
|
| 2497 |
|
|
case IPV6_RECVPKTINFO:
|
| 2498 |
|
|
case IPV6_RECVHOPLIMIT:
|
| 2499 |
|
|
case IPV6_RECVRTHDR:
|
| 2500 |
|
|
case IPV6_USE_MIN_MTU:
|
| 2501 |
|
|
case IPV6_RECVPATHMTU:
|
| 2502 |
|
|
case IPV6_DONTFRAG:
|
| 2503 |
|
|
|
| 2504 |
|
|
case IPV6_FAITH:
|
| 2505 |
|
|
case IPV6_V6ONLY:
|
| 2506 |
|
|
#ifndef __bsdi__
|
| 2507 |
|
|
case IPV6_PORTRANGE:
|
| 2508 |
|
|
#endif
|
| 2509 |
|
|
case IPV6_RECVTCLASS:
|
| 2510 |
|
|
case IPV6_AUTOFLOWLABEL:
|
| 2511 |
|
|
switch (optname) {
|
| 2512 |
|
|
|
| 2513 |
|
|
case IPV6_UNICAST_HOPS:
|
| 2514 |
|
|
optval = in6p->in6p_hops;
|
| 2515 |
|
|
break;
|
| 2516 |
|
|
|
| 2517 |
|
|
case IPV6_RECVPKTINFO:
|
| 2518 |
|
|
optval = OPTBIT(IN6P_PKTINFO);
|
| 2519 |
|
|
break;
|
| 2520 |
|
|
|
| 2521 |
|
|
case IPV6_RECVHOPLIMIT:
|
| 2522 |
|
|
optval = OPTBIT(IN6P_HOPLIMIT);
|
| 2523 |
|
|
break;
|
| 2524 |
|
|
|
| 2525 |
|
|
case IPV6_RECVHOPOPTS:
|
| 2526 |
|
|
optval = OPTBIT(IN6P_HOPOPTS);
|
| 2527 |
|
|
break;
|
| 2528 |
|
|
|
| 2529 |
|
|
case IPV6_RECVDSTOPTS:
|
| 2530 |
|
|
optval = OPTBIT(IN6P_DSTOPTS);
|
| 2531 |
|
|
break;
|
| 2532 |
|
|
|
| 2533 |
|
|
case IPV6_RECVRTHDRDSTOPTS:
|
| 2534 |
|
|
optval = OPTBIT(IN6P_RTHDRDSTOPTS);
|
| 2535 |
|
|
break;
|
| 2536 |
|
|
|
| 2537 |
|
|
case IPV6_RECVPATHMTU:
|
| 2538 |
|
|
optval = OPTBIT(IN6P_MTU);
|
| 2539 |
|
|
break;
|
| 2540 |
|
|
|
| 2541 |
|
|
case IPV6_FAITH:
|
| 2542 |
|
|
optval = OPTBIT(IN6P_FAITH);
|
| 2543 |
|
|
break;
|
| 2544 |
|
|
|
| 2545 |
|
|
case IPV6_V6ONLY:
|
| 2546 |
|
|
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
|
| 2547 |
|
|
optval = OPTBIT(IN6P_IPV6_V6ONLY);
|
| 2548 |
|
|
#else
|
| 2549 |
|
|
optval = (ip6_v6only != 0); /* XXX */
|
| 2550 |
|
|
#endif
|
| 2551 |
|
|
break;
|
| 2552 |
|
|
|
| 2553 |
|
|
#ifndef __bsdi__
|
| 2554 |
|
|
case IPV6_PORTRANGE:
|
| 2555 |
|
|
{
|
| 2556 |
|
|
int flags;
|
| 2557 |
|
|
flags = in6p->in6p_flags;
|
| 2558 |
|
|
if (flags & IN6P_HIGHPORT)
|
| 2559 |
|
|
optval = IPV6_PORTRANGE_HIGH;
|
| 2560 |
|
|
else if (flags & IN6P_LOWPORT)
|
| 2561 |
|
|
optval = IPV6_PORTRANGE_LOW;
|
| 2562 |
|
|
else
|
| 2563 |
|
|
optval = 0;
|
| 2564 |
|
|
break;
|
| 2565 |
|
|
}
|
| 2566 |
|
|
#endif
|
| 2567 |
|
|
case IPV6_RECVTCLASS:
|
| 2568 |
|
|
optval = OPTBIT(IN6P_TCLASS);
|
| 2569 |
|
|
break;
|
| 2570 |
|
|
|
| 2571 |
|
|
case IPV6_AUTOFLOWLABEL:
|
| 2572 |
|
|
optval = OPTBIT(IN6P_AUTOFLOWLABEL);
|
| 2573 |
|
|
break;
|
| 2574 |
|
|
|
| 2575 |
|
|
#define PKTOPTBIT(bit) ((in6p->in6p_outputopts && \
|
| 2576 |
|
|
(in6p->in6p_outputopts->ip6po_flags & (bit))) ? 1 : 0)
|
| 2577 |
|
|
case IPV6_DONTFRAG:
|
| 2578 |
|
|
optval = PKTOPTBIT(IP6PO_DONTFRAG);
|
| 2579 |
|
|
break;
|
| 2580 |
|
|
|
| 2581 |
|
|
case IPV6_USE_MIN_MTU:
|
| 2582 |
|
|
optval = PKTOPTBIT(IP6PO_MINMTU);
|
| 2583 |
|
|
break;
|
| 2584 |
|
|
#undef PKTOPTBIT
|
| 2585 |
|
|
}
|
| 2586 |
|
|
if (error)
|
| 2587 |
|
|
break;
|
| 2588 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2589 |
|
|
error = sooptcopyout(sopt, &optval,
|
| 2590 |
|
|
sizeof optval);
|
| 2591 |
|
|
#else
|
| 2592 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 2593 |
|
|
m->m_len = sizeof(int);
|
| 2594 |
|
|
*mtod(m, int *) = optval;
|
| 2595 |
|
|
#endif
|
| 2596 |
|
|
break;
|
| 2597 |
|
|
|
| 2598 |
|
|
case IPV6_PATHMTU:
|
| 2599 |
|
|
{
|
| 2600 |
|
|
u_long pmtu = 0;
|
| 2601 |
|
|
struct ip6_mtuinfo mtuinfo;
|
| 2602 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 2603 |
|
|
struct route *ro = &in6p->in6p_route;
|
| 2604 |
|
|
#else
|
| 2605 |
|
|
struct route_in6 *ro = (struct route_in6 *)&in6p->in6p_route;
|
| 2606 |
|
|
#endif
|
| 2607 |
|
|
|
| 2608 |
|
|
if (!(so->so_state & SS_ISCONNECTED))
|
| 2609 |
|
|
return(ENOTCONN);
|
| 2610 |
|
|
/*
|
| 2611 |
|
|
* XXX: we dot not consider the case of source
|
| 2612 |
|
|
* routing, nor optional information to specify
|
| 2613 |
|
|
* the outgoing interface.
|
| 2614 |
|
|
*/
|
| 2615 |
|
|
error = ip6_getpmtu(ro, NULL, NULL,
|
| 2616 |
|
|
&in6p->in6p_faddr, &pmtu);
|
| 2617 |
|
|
if (error)
|
| 2618 |
|
|
break;
|
| 2619 |
|
|
if (pmtu > IPV6_MAXPACKET)
|
| 2620 |
|
|
pmtu = IPV6_MAXPACKET;
|
| 2621 |
|
|
|
| 2622 |
|
|
bzero(&mtuinfo, sizeof(mtuinfo));
|
| 2623 |
|
|
mtuinfo.ip6m_mtu = (u_int32_t)pmtu;
|
| 2624 |
|
|
optdata = (void *)&mtuinfo;
|
| 2625 |
|
|
optdatalen = sizeof(mtuinfo);
|
| 2626 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2627 |
|
|
error = sooptcopyout(sopt, optdata,
|
| 2628 |
|
|
optdatalen);
|
| 2629 |
|
|
#else /* !FreeBSD3 */
|
| 2630 |
|
|
if (optdatalen > MCLBYTES)
|
| 2631 |
|
|
return(EMSGSIZE); /* XXX */
|
| 2632 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 2633 |
|
|
if (optdatalen > MLEN)
|
| 2634 |
|
|
MCLGET(m, M_WAIT);
|
| 2635 |
|
|
m->m_len = optdatalen;
|
| 2636 |
|
|
bcopy(optdata, mtod(m, void *),
|
| 2637 |
|
|
optdatalen);
|
| 2638 |
|
|
#endif /* FreeBSD3 */
|
| 2639 |
|
|
break;
|
| 2640 |
|
|
}
|
| 2641 |
|
|
|
| 2642 |
|
|
case IPV6_2292PKTINFO:
|
| 2643 |
|
|
case IPV6_2292HOPLIMIT:
|
| 2644 |
|
|
case IPV6_2292HOPOPTS:
|
| 2645 |
|
|
case IPV6_2292RTHDR:
|
| 2646 |
|
|
case IPV6_2292DSTOPTS:
|
| 2647 |
|
|
if (optname == IPV6_2292HOPOPTS ||
|
| 2648 |
|
|
optname == IPV6_2292DSTOPTS ||
|
| 2649 |
|
|
!privileged)
|
| 2650 |
|
|
return(EPERM);
|
| 2651 |
|
|
switch (optname) {
|
| 2652 |
|
|
case IPV6_2292PKTINFO:
|
| 2653 |
|
|
optval = OPTBIT(IN6P_PKTINFO);
|
| 2654 |
|
|
break;
|
| 2655 |
|
|
case IPV6_2292HOPLIMIT:
|
| 2656 |
|
|
optval = OPTBIT(IN6P_HOPLIMIT);
|
| 2657 |
|
|
break;
|
| 2658 |
|
|
case IPV6_2292HOPOPTS:
|
| 2659 |
|
|
optval = OPTBIT(IN6P_HOPOPTS);
|
| 2660 |
|
|
break;
|
| 2661 |
|
|
case IPV6_2292RTHDR:
|
| 2662 |
|
|
optval = OPTBIT(IN6P_RTHDR);
|
| 2663 |
|
|
break;
|
| 2664 |
|
|
case IPV6_2292DSTOPTS:
|
| 2665 |
|
|
optval = OPTBIT(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS);
|
| 2666 |
|
|
break;
|
| 2667 |
|
|
}
|
| 2668 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2669 |
|
|
error = sooptcopyout(sopt, &optval,
|
| 2670 |
|
|
sizeof optval);
|
| 2671 |
|
|
#else
|
| 2672 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 2673 |
|
|
m->m_len = sizeof(int);
|
| 2674 |
|
|
*mtod(m, int *) = optval;
|
| 2675 |
|
|
#endif /* FreeBSD3 */
|
| 2676 |
|
|
break;
|
| 2677 |
|
|
case IPV6_PKTINFO:
|
| 2678 |
|
|
case IPV6_HOPOPTS:
|
| 2679 |
|
|
case IPV6_RTHDR:
|
| 2680 |
|
|
case IPV6_DSTOPTS:
|
| 2681 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 2682 |
|
|
case IPV6_NEXTHOP:
|
| 2683 |
|
|
case IPV6_OTCLASS:
|
| 2684 |
|
|
case IPV6_TCLASS:
|
| 2685 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2686 |
|
|
error = ip6_getpcbopt(in6p->in6p_outputopts,
|
| 2687 |
|
|
optname, sopt);
|
| 2688 |
|
|
#else
|
| 2689 |
|
|
error = ip6_getpcbopt(in6p->in6p_outputopts,
|
| 2690 |
|
|
optname, mp);
|
| 2691 |
|
|
#endif
|
| 2692 |
|
|
break;
|
| 2693 |
|
|
|
| 2694 |
|
|
case IPV6_MULTICAST_IF:
|
| 2695 |
|
|
case IPV6_MULTICAST_HOPS:
|
| 2696 |
|
|
case IPV6_MULTICAST_LOOP:
|
| 2697 |
|
|
case IPV6_JOIN_GROUP:
|
| 2698 |
|
|
case IPV6_LEAVE_GROUP:
|
| 2699 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2700 |
|
|
{
|
| 2701 |
|
|
struct mbuf *m;
|
| 2702 |
|
|
error = ip6_getmoptions(sopt->sopt_name,
|
| 2703 |
|
|
in6p->in6p_moptions, &m);
|
| 2704 |
|
|
if (error == 0)
|
| 2705 |
|
|
error = sooptcopyout(sopt,
|
| 2706 |
|
|
mtod(m, char *), m->m_len);
|
| 2707 |
|
|
m_freem(m);
|
| 2708 |
|
|
}
|
| 2709 |
|
|
#else
|
| 2710 |
|
|
error = ip6_getmoptions(optname, in6p->in6p_moptions, mp);
|
| 2711 |
|
|
#endif
|
| 2712 |
|
|
break;
|
| 2713 |
|
|
|
| 2714 |
|
|
#ifdef __OpenBSD__
|
| 2715 |
|
|
case IPSEC6_OUTSA:
|
| 2716 |
|
|
#ifndef IPSEC
|
| 2717 |
|
|
error = EINVAL;
|
| 2718 |
|
|
#else
|
| 2719 |
|
|
s = spltdb();
|
| 2720 |
|
|
if (inp->inp_tdb_out == NULL) {
|
| 2721 |
|
|
error = ENOENT;
|
| 2722 |
|
|
} else {
|
| 2723 |
|
|
tdbi.spi = inp->inp_tdb_out->tdb_spi;
|
| 2724 |
|
|
tdbi.dst = inp->inp_tdb_out->tdb_dst;
|
| 2725 |
|
|
tdbi.proto = inp->inp_tdb_out->tdb_sproto;
|
| 2726 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 2727 |
|
|
m->m_len = sizeof(tdbi);
|
| 2728 |
|
|
bcopy((caddr_t)&tdbi, mtod(m, caddr_t),
|
| 2729 |
|
|
(unsigned)m->m_len);
|
| 2730 |
|
|
}
|
| 2731 |
|
|
splx(s);
|
| 2732 |
|
|
#endif
|
| 2733 |
|
|
break;
|
| 2734 |
|
|
|
| 2735 |
|
|
case IPV6_AUTH_LEVEL:
|
| 2736 |
|
|
case IPV6_ESP_TRANS_LEVEL:
|
| 2737 |
|
|
case IPV6_ESP_NETWORK_LEVEL:
|
| 2738 |
|
|
case IPV6_IPCOMP_LEVEL:
|
| 2739 |
|
|
#ifndef IPSEC
|
| 2740 |
|
|
m->m_len = sizeof(int);
|
| 2741 |
|
|
*mtod(m, int *) = IPSEC_LEVEL_NONE;
|
| 2742 |
|
|
#else
|
| 2743 |
|
|
m->m_len = sizeof(int);
|
| 2744 |
|
|
switch (optname) {
|
| 2745 |
|
|
case IPV6_AUTH_LEVEL:
|
| 2746 |
|
|
optval = inp->inp_seclevel[SL_AUTH];
|
| 2747 |
|
|
break;
|
| 2748 |
|
|
|
| 2749 |
|
|
case IPV6_ESP_TRANS_LEVEL:
|
| 2750 |
|
|
optval =
|
| 2751 |
|
|
inp->inp_seclevel[SL_ESP_TRANS];
|
| 2752 |
|
|
break;
|
| 2753 |
|
|
|
| 2754 |
|
|
case IPV6_ESP_NETWORK_LEVEL:
|
| 2755 |
|
|
optval =
|
| 2756 |
|
|
inp->inp_seclevel[SL_ESP_NETWORK];
|
| 2757 |
|
|
break;
|
| 2758 |
|
|
|
| 2759 |
|
|
case IPV6_IPCOMP_LEVEL:
|
| 2760 |
|
|
optval = inp->inp_seclevel[SL_IPCOMP];
|
| 2761 |
|
|
break;
|
| 2762 |
|
|
}
|
| 2763 |
|
|
*mtod(m, int *) = optval;
|
| 2764 |
|
|
#endif
|
| 2765 |
|
|
break;
|
| 2766 |
|
|
#endif /* OpenBSD */
|
| 2767 |
|
|
|
| 2768 |
|
|
#if defined(IPSEC) && !defined(__OpenBSD__)
|
| 2769 |
|
|
case IPV6_IPSEC_POLICY:
|
| 2770 |
|
|
{
|
| 2771 |
|
|
caddr_t req = NULL;
|
| 2772 |
|
|
size_t len = 0;
|
| 2773 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2774 |
|
|
struct mbuf *m = NULL;
|
| 2775 |
|
|
struct mbuf **mp = &m;
|
| 2776 |
|
|
|
| 2777 |
|
|
error = soopt_getm(sopt, &m); /* XXX */
|
| 2778 |
|
|
if (error != NULL)
|
| 2779 |
|
|
break;
|
| 2780 |
|
|
error = soopt_mcopyin(sopt, m); /* XXX */
|
| 2781 |
|
|
if (error != NULL)
|
| 2782 |
|
|
break;
|
| 2783 |
|
|
#endif
|
| 2784 |
|
|
if (m) {
|
| 2785 |
|
|
req = mtod(m, caddr_t);
|
| 2786 |
|
|
len = m->m_len;
|
| 2787 |
|
|
}
|
| 2788 |
|
|
error = ipsec6_get_policy(in6p, req, len, mp);
|
| 2789 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2790 |
|
|
if (error == 0)
|
| 2791 |
|
|
error = soopt_mcopyout(sopt, m); /* XXX */
|
| 2792 |
|
|
if (error == 0 && m)
|
| 2793 |
|
|
m_freem(m);
|
| 2794 |
|
|
#endif
|
| 2795 |
|
|
break;
|
| 2796 |
|
|
}
|
| 2797 |
|
|
#endif /* KAME IPSEC */
|
| 2798 |
|
|
|
| 2799 |
|
|
#if defined(IPV6FIREWALL) || (defined(__FreeBSD__) && __FreeBSD__ >= 4)
|
| 2800 |
|
|
case IPV6_FW_GET:
|
| 2801 |
|
|
{
|
| 2802 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2803 |
|
|
struct mbuf *m;
|
| 2804 |
|
|
struct mbuf **mp = &m;
|
| 2805 |
|
|
#endif
|
| 2806 |
|
|
|
| 2807 |
|
|
if (ip6_fw_ctl_ptr == NULL)
|
| 2808 |
|
|
{
|
| 2809 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2810 |
|
|
if (m)
|
| 2811 |
|
|
(void)m_free(m);
|
| 2812 |
|
|
#endif
|
| 2813 |
|
|
return EINVAL;
|
| 2814 |
|
|
}
|
| 2815 |
|
|
error = (*ip6_fw_ctl_ptr)(optname, mp);
|
| 2816 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2817 |
|
|
if (error == 0)
|
| 2818 |
|
|
error = soopt_mcopyout(sopt, m); /* XXX */
|
| 2819 |
|
|
if (error == 0 && m)
|
| 2820 |
|
|
m_freem(m);
|
| 2821 |
|
|
#endif
|
| 2822 |
|
|
}
|
| 2823 |
|
|
break;
|
| 2824 |
|
|
#endif
|
| 2825 |
|
|
|
| 2826 |
|
|
default:
|
| 2827 |
|
|
error = ENOPROTOOPT;
|
| 2828 |
|
|
break;
|
| 2829 |
|
|
}
|
| 2830 |
|
|
break;
|
| 2831 |
|
|
}
|
| 2832 |
|
|
} else { /* level != IPPROTO_IPV6 */
|
| 2833 |
|
|
error = EINVAL;
|
| 2834 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2835 |
|
|
if (op == PRCO_SETOPT && *mp)
|
| 2836 |
|
|
(void)m_free(*mp);
|
| 2837 |
|
|
#endif
|
| 2838 |
|
|
}
|
| 2839 |
|
|
return(error);
|
| 2840 |
|
|
}
|
| 2841 |
|
|
|
| 2842 |
|
|
#ifndef offsetof
|
| 2843 |
|
|
#define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */
|
| 2844 |
|
|
#endif
|
| 2845 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2846 |
|
|
int
|
| 2847 |
|
|
ip6_raw_ctloutput(so, sopt)
|
| 2848 |
|
|
struct socket *so;
|
| 2849 |
|
|
struct sockopt *sopt;
|
| 2850 |
|
|
#else
|
| 2851 |
|
|
int
|
| 2852 |
|
|
ip6_raw_ctloutput(op, so, level, optname, mp)
|
| 2853 |
|
|
int op;
|
| 2854 |
|
|
struct socket *so;
|
| 2855 |
|
|
int level, optname;
|
| 2856 |
|
|
struct mbuf **mp;
|
| 2857 |
|
|
#endif
|
| 2858 |
|
|
{
|
| 2859 |
|
|
int error = 0, optval, optlen;
|
| 2860 |
|
|
const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum);
|
| 2861 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 2862 |
|
|
struct inpcb *inp = sotoinpcb(so);
|
| 2863 |
|
|
#else
|
| 2864 |
|
|
struct in6pcb *in6p = sotoin6pcb(so);
|
| 2865 |
|
|
#endif
|
| 2866 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2867 |
|
|
int level, op, optname;
|
| 2868 |
|
|
struct proc *p;
|
| 2869 |
|
|
#else
|
| 2870 |
|
|
struct mbuf *m = *mp;
|
| 2871 |
|
|
#endif /* FreeBSD >= 3 */
|
| 2872 |
|
|
|
| 2873 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2874 |
|
|
if (!sopt) {
|
| 2875 |
|
|
panic("ip6_ctloutput: arg soopt is NULL");
|
| 2876 |
|
|
}
|
| 2877 |
|
|
level = sopt->sopt_level;
|
| 2878 |
|
|
op = sopt->sopt_dir;
|
| 2879 |
|
|
optname = sopt->sopt_name;
|
| 2880 |
|
|
optlen = sopt->sopt_valsize;
|
| 2881 |
|
|
p = sopt->sopt_p;
|
| 2882 |
|
|
#else
|
| 2883 |
|
|
optlen = m ? m->m_len : 0;
|
| 2884 |
|
|
#endif /* FreeBSD >= 3 */
|
| 2885 |
|
|
|
| 2886 |
|
|
if (level != IPPROTO_IPV6) {
|
| 2887 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2888 |
|
|
if (op == PRCO_SETOPT && *mp)
|
| 2889 |
|
|
(void)m_free(*mp);
|
| 2890 |
|
|
#endif
|
| 2891 |
|
|
return(EINVAL);
|
| 2892 |
|
|
}
|
| 2893 |
|
|
|
| 2894 |
|
|
switch (optname) {
|
| 2895 |
|
|
case IPV6_CHECKSUM:
|
| 2896 |
|
|
/*
|
| 2897 |
|
|
* For ICMPv6 sockets, no modification allowed for checksum
|
| 2898 |
|
|
* offset, permit "no change" values to help existing apps.
|
| 2899 |
|
|
*
|
| 2900 |
|
|
* XXX 2292bis says: "An attempt to set IPV6_CHECKSUM
|
| 2901 |
|
|
* for an ICMPv6 socket will fail."
|
| 2902 |
|
|
* The current behavior does not meet 2292bis.
|
| 2903 |
|
|
*/
|
| 2904 |
|
|
switch (op) {
|
| 2905 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2906 |
|
|
case SOPT_SET:
|
| 2907 |
|
|
#else
|
| 2908 |
|
|
case PRCO_SETOPT:
|
| 2909 |
|
|
#endif
|
| 2910 |
|
|
if (optlen != sizeof(int)) {
|
| 2911 |
|
|
error = EINVAL;
|
| 2912 |
|
|
break;
|
| 2913 |
|
|
}
|
| 2914 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2915 |
|
|
error = sooptcopyin(sopt, &optval, sizeof(optval),
|
| 2916 |
|
|
sizeof(optval));
|
| 2917 |
|
|
if (error)
|
| 2918 |
|
|
break;
|
| 2919 |
|
|
#else
|
| 2920 |
|
|
optval = *mtod(m, int *);
|
| 2921 |
|
|
#endif
|
| 2922 |
|
|
if ((optval % 2) != 0) {
|
| 2923 |
|
|
/* the API assumes even offset values */
|
| 2924 |
|
|
error = EINVAL;
|
| 2925 |
|
|
} else if (so->so_proto->pr_protocol ==
|
| 2926 |
|
|
IPPROTO_ICMPV6) {
|
| 2927 |
|
|
if (optval != icmp6off)
|
| 2928 |
|
|
error = EINVAL;
|
| 2929 |
|
|
} else
|
| 2930 |
|
|
in6p->in6p_cksum = optval;
|
| 2931 |
|
|
break;
|
| 2932 |
|
|
|
| 2933 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2934 |
|
|
case SOPT_GET:
|
| 2935 |
|
|
#else
|
| 2936 |
|
|
case PRCO_GETOPT:
|
| 2937 |
|
|
#endif
|
| 2938 |
|
|
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
|
| 2939 |
|
|
optval = icmp6off;
|
| 2940 |
|
|
else
|
| 2941 |
|
|
optval = in6p->in6p_cksum;
|
| 2942 |
|
|
|
| 2943 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2944 |
|
|
error = sooptcopyout(sopt, &optval, sizeof(optval));
|
| 2945 |
|
|
#else
|
| 2946 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 2947 |
|
|
m->m_len = sizeof(int);
|
| 2948 |
|
|
*mtod(m, int *) = optval;
|
| 2949 |
|
|
#endif /* FreeBSD3 */
|
| 2950 |
|
|
break;
|
| 2951 |
|
|
default:
|
| 2952 |
|
|
error = EINVAL;
|
| 2953 |
|
|
break;
|
| 2954 |
|
|
}
|
| 2955 |
|
|
|
| 2956 |
|
|
default:
|
| 2957 |
|
|
error = ENOPROTOOPT;
|
| 2958 |
|
|
break;
|
| 2959 |
|
|
}
|
| 2960 |
|
|
|
| 2961 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2962 |
|
|
if (op == PRCO_SETOPT && m)
|
| 2963 |
|
|
(void)m_free(m);
|
| 2964 |
|
|
#endif
|
| 2965 |
|
|
|
| 2966 |
|
|
return(error);
|
| 2967 |
|
|
}
|
| 2968 |
|
|
|
| 2969 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 2970 |
|
|
#undef in6p
|
| 2971 |
|
|
#endif
|
| 2972 |
|
|
|
| 2973 |
|
|
/*
|
| 2974 |
|
|
* Set up IP6 options in pcb for insertion in output packets or
|
| 2975 |
|
|
* specifying behavior of outgoing packets.
|
| 2976 |
|
|
*/
|
| 2977 |
|
|
static int
|
| 2978 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2979 |
|
|
ip6_pcbopts(pktopt, m, so, sopt)
|
| 2980 |
|
|
#else
|
| 2981 |
|
|
ip6_pcbopts(pktopt, m, so)
|
| 2982 |
|
|
#endif
|
| 2983 |
|
|
struct ip6_pktopts **pktopt;
|
| 2984 |
|
|
struct mbuf *m;
|
| 2985 |
|
|
struct socket *so;
|
| 2986 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2987 |
|
|
struct sockopt *sopt;
|
| 2988 |
|
|
#endif
|
| 2989 |
|
|
{
|
| 2990 |
|
|
struct ip6_pktopts *opt = *pktopt;
|
| 2991 |
|
|
int error = 0;
|
| 2992 |
|
|
int priv = 1;
|
| 2993 |
|
|
|
| 2994 |
|
|
/* turn off any old options. */
|
| 2995 |
|
|
if (opt) {
|
| 2996 |
|
|
#ifdef DIAGNOSTIC
|
| 2997 |
|
|
if (opt->ip6po_pktinfo || opt->ip6po_nexthop ||
|
| 2998 |
|
|
opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 ||
|
| 2999 |
|
|
opt->ip6po_rhinfo.ip6po_rhi_rthdr)
|
| 3000 |
|
|
printf("ip6_pcbopts: all specified options are cleared.\n");
|
| 3001 |
|
|
#endif
|
| 3002 |
|
|
ip6_clearpktopts(opt, -1);
|
| 3003 |
|
|
} else
|
| 3004 |
|
|
opt = malloc(sizeof(*opt), M_IP6OPT, M_WAITOK);
|
| 3005 |
|
|
*pktopt = NULL;
|
| 3006 |
|
|
|
| 3007 |
|
|
if (!m || m->m_len == 0) {
|
| 3008 |
|
|
/*
|
| 3009 |
|
|
* Only turning off any previous options.
|
| 3010 |
|
|
*/
|
| 3011 |
|
|
if (opt)
|
| 3012 |
|
|
free(opt, M_IP6OPT);
|
| 3013 |
|
|
return(0);
|
| 3014 |
|
|
}
|
| 3015 |
|
|
|
| 3016 |
|
|
if ((error = ip6_setpktoptions(m, opt, NULL, priv, 1)) != 0) {
|
| 3017 |
|
|
ip6_clearpktopts(opt, -1); /* XXX: discard all options */
|
| 3018 |
|
|
return(error);
|
| 3019 |
|
|
}
|
| 3020 |
|
|
*pktopt = opt;
|
| 3021 |
|
|
return(0);
|
| 3022 |
|
|
}
|
| 3023 |
|
|
|
| 3024 |
|
|
/*
|
| 3025 |
|
|
* initialize ip6_pktopts. beware that there are non-zero default values in
|
| 3026 |
|
|
* the struct.
|
| 3027 |
|
|
*/
|
| 3028 |
|
|
void
|
| 3029 |
|
|
init_ip6pktopts(opt)
|
| 3030 |
|
|
struct ip6_pktopts *opt;
|
| 3031 |
|
|
{
|
| 3032 |
|
|
|
| 3033 |
|
|
bzero(opt, sizeof(*opt));
|
| 3034 |
|
|
opt->ip6po_hlim = -1; /* -1 means default hop limit */
|
| 3035 |
|
|
opt->ip6po_tclass = -1; /* -1 means default traffic class */
|
| 3036 |
|
|
}
|
| 3037 |
|
|
|
| 3038 |
|
|
#define sin6tosa(sin6) ((struct sockaddr *)(sin6)) /* XXX */
|
| 3039 |
|
|
static int
|
| 3040 |
|
|
ip6_pcbopt(optname, buf, len, pktopt, priv)
|
| 3041 |
|
|
int optname, len, priv;
|
| 3042 |
|
|
u_char *buf;
|
| 3043 |
|
|
struct ip6_pktopts **pktopt;
|
| 3044 |
|
|
{
|
| 3045 |
|
|
struct ip6_pktopts *opt;
|
| 3046 |
|
|
|
| 3047 |
|
|
if (*pktopt == NULL) {
|
| 3048 |
|
|
*pktopt = malloc(sizeof(struct ip6_pktopts), M_IP6OPT,
|
| 3049 |
|
|
M_WAITOK);
|
| 3050 |
|
|
init_ip6pktopts(*pktopt);
|
| 3051 |
|
|
(*pktopt)->needfree = 1;
|
| 3052 |
|
|
}
|
| 3053 |
|
|
opt = *pktopt;
|
| 3054 |
|
|
|
| 3055 |
|
|
return(ip6_setpktoption(optname, buf, len, opt, priv, 1, 0));
|
| 3056 |
|
|
}
|
| 3057 |
|
|
|
| 3058 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3059 |
|
|
static int
|
| 3060 |
|
|
ip6_getpcbopt(pktopt, optname, sopt)
|
| 3061 |
|
|
struct ip6_pktopts *pktopt;
|
| 3062 |
|
|
struct sockopt *sopt;
|
| 3063 |
|
|
int optname;
|
| 3064 |
|
|
#else
|
| 3065 |
|
|
static int
|
| 3066 |
|
|
ip6_getpcbopt(pktopt, optname, mp)
|
| 3067 |
|
|
struct ip6_pktopts *pktopt;
|
| 3068 |
|
|
int optname;
|
| 3069 |
|
|
struct mbuf **mp;
|
| 3070 |
|
|
#endif
|
| 3071 |
|
|
{
|
| 3072 |
|
|
void *optdata = NULL;
|
| 3073 |
|
|
int optdatalen = 0;
|
| 3074 |
|
|
struct ip6_ext *ip6e;
|
| 3075 |
|
|
int error = 0;
|
| 3076 |
|
|
struct in6_pktinfo null_pktinfo;
|
| 3077 |
|
|
int deftclass = 0;
|
| 3078 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 3079 |
|
|
struct mbuf *m;
|
| 3080 |
|
|
#endif
|
| 3081 |
|
|
|
| 3082 |
|
|
switch (optname) {
|
| 3083 |
|
|
case IPV6_PKTINFO:
|
| 3084 |
|
|
if (pktopt && pktopt->ip6po_pktinfo)
|
| 3085 |
|
|
optdata = (void *)pktopt->ip6po_pktinfo;
|
| 3086 |
|
|
else {
|
| 3087 |
|
|
/* XXX: we don't have to do this every time... */
|
| 3088 |
|
|
bzero(&null_pktinfo, sizeof(null_pktinfo));
|
| 3089 |
|
|
optdata = (void *)&null_pktinfo;
|
| 3090 |
|
|
}
|
| 3091 |
|
|
optdatalen = sizeof(struct in6_pktinfo);
|
| 3092 |
|
|
break;
|
| 3093 |
|
|
case IPV6_OTCLASS:
|
| 3094 |
|
|
/* XXX */
|
| 3095 |
|
|
return(EINVAL);
|
| 3096 |
|
|
case IPV6_TCLASS:
|
| 3097 |
|
|
if (pktopt && pktopt->ip6po_tclass >= 0)
|
| 3098 |
|
|
optdata = (void *)&pktopt->ip6po_tclass;
|
| 3099 |
|
|
else
|
| 3100 |
|
|
optdata = (void *)&deftclass;
|
| 3101 |
|
|
optdatalen = sizeof(int);
|
| 3102 |
|
|
break;
|
| 3103 |
|
|
case IPV6_HOPOPTS:
|
| 3104 |
|
|
if (pktopt && pktopt->ip6po_hbh) {
|
| 3105 |
|
|
optdata = (void *)pktopt->ip6po_hbh;
|
| 3106 |
|
|
ip6e = (struct ip6_ext *)pktopt->ip6po_hbh;
|
| 3107 |
|
|
optdatalen = (ip6e->ip6e_len + 1) << 3;
|
| 3108 |
|
|
}
|
| 3109 |
|
|
break;
|
| 3110 |
|
|
case IPV6_RTHDR:
|
| 3111 |
|
|
if (pktopt && pktopt->ip6po_rthdr) {
|
| 3112 |
|
|
optdata = (void *)pktopt->ip6po_rthdr;
|
| 3113 |
|
|
ip6e = (struct ip6_ext *)pktopt->ip6po_rthdr;
|
| 3114 |
|
|
optdatalen = (ip6e->ip6e_len + 1) << 3;
|
| 3115 |
|
|
}
|
| 3116 |
|
|
break;
|
| 3117 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 3118 |
|
|
if (pktopt && pktopt->ip6po_dest1) {
|
| 3119 |
|
|
optdata = (void *)pktopt->ip6po_dest1;
|
| 3120 |
|
|
ip6e = (struct ip6_ext *)pktopt->ip6po_dest1;
|
| 3121 |
|
|
optdatalen = (ip6e->ip6e_len + 1) << 3;
|
| 3122 |
|
|
}
|
| 3123 |
|
|
break;
|
| 3124 |
|
|
case IPV6_DSTOPTS:
|
| 3125 |
|
|
if (pktopt && pktopt->ip6po_dest2) {
|
| 3126 |
|
|
optdata = (void *)pktopt->ip6po_dest2;
|
| 3127 |
|
|
ip6e = (struct ip6_ext *)pktopt->ip6po_dest2;
|
| 3128 |
|
|
optdatalen = (ip6e->ip6e_len + 1) << 3;
|
| 3129 |
|
|
}
|
| 3130 |
|
|
break;
|
| 3131 |
|
|
case IPV6_NEXTHOP:
|
| 3132 |
|
|
if (pktopt && pktopt->ip6po_nexthop) {
|
| 3133 |
|
|
optdata = (void *)pktopt->ip6po_nexthop;
|
| 3134 |
|
|
optdatalen = pktopt->ip6po_nexthop->sa_len;
|
| 3135 |
|
|
}
|
| 3136 |
|
|
break;
|
| 3137 |
|
|
default: /* should not happen */
|
| 3138 |
|
|
printf("ip6_getpcbopt: unexpected option: %d\n", optname);
|
| 3139 |
|
|
return(ENOPROTOOPT);
|
| 3140 |
|
|
}
|
| 3141 |
|
|
|
| 3142 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3143 |
|
|
error = sooptcopyout(sopt, optdata, optdatalen);
|
| 3144 |
|
|
#else /* !FreeBSD3 */
|
| 3145 |
|
|
if (optdatalen > MCLBYTES)
|
| 3146 |
|
|
return(EMSGSIZE); /* XXX */
|
| 3147 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 3148 |
|
|
if (optdatalen > MLEN)
|
| 3149 |
|
|
MCLGET(m, M_WAIT);
|
| 3150 |
|
|
m->m_len = optdatalen;
|
| 3151 |
|
|
if (optdatalen)
|
| 3152 |
|
|
bcopy(optdata, mtod(m, void *), optdatalen);
|
| 3153 |
|
|
#endif /* FreeBSD3 */
|
| 3154 |
|
|
|
| 3155 |
|
|
return(error);
|
| 3156 |
|
|
}
|
| 3157 |
|
|
|
| 3158 |
|
|
void
|
| 3159 |
|
|
ip6_clearpktopts(pktopt, optname)
|
| 3160 |
|
|
struct ip6_pktopts *pktopt;
|
| 3161 |
|
|
int optname;
|
| 3162 |
|
|
{
|
| 3163 |
|
|
int needfree = pktopt->needfree;
|
| 3164 |
|
|
|
| 3165 |
|
|
if (pktopt == NULL)
|
| 3166 |
|
|
return;
|
| 3167 |
|
|
|
| 3168 |
|
|
if (optname == -1 || optname == IPV6_PKTINFO) {
|
| 3169 |
|
|
if (needfree && pktopt->ip6po_pktinfo)
|
| 3170 |
|
|
free(pktopt->ip6po_pktinfo, M_IP6OPT);
|
| 3171 |
|
|
pktopt->ip6po_pktinfo = NULL;
|
| 3172 |
|
|
}
|
| 3173 |
|
|
if (optname == -1 || optname == IPV6_HOPLIMIT)
|
| 3174 |
|
|
pktopt->ip6po_hlim = -1;
|
| 3175 |
|
|
if (optname == -1 || optname == IPV6_TCLASS)
|
| 3176 |
|
|
pktopt->ip6po_tclass = -1;
|
| 3177 |
|
|
if (optname == -1 || optname == IPV6_NEXTHOP) {
|
| 3178 |
|
|
if (pktopt->ip6po_nextroute.ro_rt) {
|
| 3179 |
|
|
RTFREE(pktopt->ip6po_nextroute.ro_rt);
|
| 3180 |
|
|
pktopt->ip6po_nextroute.ro_rt = NULL;
|
| 3181 |
|
|
}
|
| 3182 |
|
|
if (needfree && pktopt->ip6po_nexthop)
|
| 3183 |
|
|
free(pktopt->ip6po_nexthop, M_IP6OPT);
|
| 3184 |
|
|
pktopt->ip6po_nexthop = NULL;
|
| 3185 |
|
|
}
|
| 3186 |
|
|
if (optname == -1 || optname == IPV6_HOPOPTS) {
|
| 3187 |
|
|
if (needfree && pktopt->ip6po_hbh)
|
| 3188 |
|
|
free(pktopt->ip6po_hbh, M_IP6OPT);
|
| 3189 |
|
|
pktopt->ip6po_hbh = NULL;
|
| 3190 |
|
|
}
|
| 3191 |
|
|
if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) {
|
| 3192 |
|
|
if (needfree && pktopt->ip6po_dest1)
|
| 3193 |
|
|
free(pktopt->ip6po_dest1, M_IP6OPT);
|
| 3194 |
|
|
pktopt->ip6po_dest1 = NULL;
|
| 3195 |
|
|
}
|
| 3196 |
|
|
if (optname == -1 || optname == IPV6_RTHDR) {
|
| 3197 |
|
|
if (needfree && pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
|
| 3198 |
|
|
free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT);
|
| 3199 |
|
|
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL;
|
| 3200 |
|
|
if (pktopt->ip6po_route.ro_rt) {
|
| 3201 |
|
|
RTFREE(pktopt->ip6po_route.ro_rt);
|
| 3202 |
|
|
pktopt->ip6po_route.ro_rt = NULL;
|
| 3203 |
|
|
}
|
| 3204 |
|
|
}
|
| 3205 |
|
|
if (optname == -1 || optname == IPV6_DSTOPTS) {
|
| 3206 |
|
|
if (needfree && pktopt->ip6po_dest2)
|
| 3207 |
|
|
free(pktopt->ip6po_dest2, M_IP6OPT);
|
| 3208 |
|
|
pktopt->ip6po_dest2 = NULL;
|
| 3209 |
|
|
}
|
| 3210 |
|
|
}
|
| 3211 |
|
|
|
| 3212 |
|
|
#define PKTOPT_EXTHDRCPY(type) \
|
| 3213 |
|
|
do {\
|
| 3214 |
|
|
if (src->type) {\
|
| 3215 |
|
|
int hlen =\
|
| 3216 |
|
|
(((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\
|
| 3217 |
|
|
dst->type = malloc(hlen, M_IP6OPT, canwait);\
|
| 3218 |
|
|
if (dst->type == NULL && canwait == M_NOWAIT)\
|
| 3219 |
|
|
goto bad;\
|
| 3220 |
|
|
bcopy(src->type, dst->type, hlen);\
|
| 3221 |
|
|
}\
|
| 3222 |
|
|
} while (0)
|
| 3223 |
|
|
|
| 3224 |
|
|
struct ip6_pktopts *
|
| 3225 |
|
|
ip6_copypktopts(src, canwait)
|
| 3226 |
|
|
struct ip6_pktopts *src;
|
| 3227 |
|
|
int canwait;
|
| 3228 |
|
|
{
|
| 3229 |
|
|
struct ip6_pktopts *dst;
|
| 3230 |
|
|
|
| 3231 |
|
|
if (src == NULL) {
|
| 3232 |
|
|
printf("ip6_clearpktopts: invalid argument\n");
|
| 3233 |
|
|
return(NULL);
|
| 3234 |
|
|
}
|
| 3235 |
|
|
|
| 3236 |
|
|
dst = malloc(sizeof(*dst), M_IP6OPT, canwait);
|
| 3237 |
|
|
if (dst == NULL && canwait == M_NOWAIT)
|
| 3238 |
|
|
goto bad;
|
| 3239 |
|
|
bzero(dst, sizeof(*dst));
|
| 3240 |
|
|
dst->needfree = 1;
|
| 3241 |
|
|
|
| 3242 |
|
|
dst->ip6po_hlim = src->ip6po_hlim;
|
| 3243 |
|
|
dst->ip6po_tclass = src->ip6po_tclass;
|
| 3244 |
|
|
dst->ip6po_flags = src->ip6po_flags;
|
| 3245 |
|
|
if (src->ip6po_pktinfo) {
|
| 3246 |
|
|
dst->ip6po_pktinfo = malloc(sizeof(*dst->ip6po_pktinfo),
|
| 3247 |
|
|
M_IP6OPT, canwait);
|
| 3248 |
|
|
if (dst->ip6po_pktinfo == NULL && canwait == M_NOWAIT)
|
| 3249 |
|
|
goto bad;
|
| 3250 |
|
|
*dst->ip6po_pktinfo = *src->ip6po_pktinfo;
|
| 3251 |
|
|
}
|
| 3252 |
|
|
if (src->ip6po_nexthop) {
|
| 3253 |
|
|
dst->ip6po_nexthop = malloc(src->ip6po_nexthop->sa_len,
|
| 3254 |
|
|
M_IP6OPT, canwait);
|
| 3255 |
|
|
if (dst->ip6po_nexthop == NULL && canwait == M_NOWAIT)
|
| 3256 |
|
|
goto bad;
|
| 3257 |
|
|
bcopy(src->ip6po_nexthop, dst->ip6po_nexthop,
|
| 3258 |
|
|
src->ip6po_nexthop->sa_len);
|
| 3259 |
|
|
}
|
| 3260 |
|
|
PKTOPT_EXTHDRCPY(ip6po_hbh);
|
| 3261 |
|
|
PKTOPT_EXTHDRCPY(ip6po_dest1);
|
| 3262 |
|
|
PKTOPT_EXTHDRCPY(ip6po_dest2);
|
| 3263 |
|
|
PKTOPT_EXTHDRCPY(ip6po_rthdr); /* not copy the cached route */
|
| 3264 |
|
|
return(dst);
|
| 3265 |
|
|
|
| 3266 |
|
|
bad:
|
| 3267 |
|
|
printf("ip6_copypktopts: copy failed");
|
| 3268 |
|
|
if (dst->ip6po_pktinfo) free(dst->ip6po_pktinfo, M_IP6OPT);
|
| 3269 |
|
|
if (dst->ip6po_nexthop) free(dst->ip6po_nexthop, M_IP6OPT);
|
| 3270 |
|
|
if (dst->ip6po_hbh) free(dst->ip6po_hbh, M_IP6OPT);
|
| 3271 |
|
|
if (dst->ip6po_dest1) free(dst->ip6po_dest1, M_IP6OPT);
|
| 3272 |
|
|
if (dst->ip6po_dest2) free(dst->ip6po_dest2, M_IP6OPT);
|
| 3273 |
|
|
if (dst->ip6po_rthdr) free(dst->ip6po_rthdr, M_IP6OPT);
|
| 3274 |
|
|
return(NULL);
|
| 3275 |
|
|
}
|
| 3276 |
|
|
#undef PKTOPT_EXTHDRCPY
|
| 3277 |
|
|
|
| 3278 |
|
|
void
|
| 3279 |
|
|
ip6_freepcbopts(pktopt)
|
| 3280 |
|
|
struct ip6_pktopts *pktopt;
|
| 3281 |
|
|
{
|
| 3282 |
|
|
if (pktopt == NULL)
|
| 3283 |
|
|
return;
|
| 3284 |
|
|
|
| 3285 |
|
|
ip6_clearpktopts(pktopt, -1);
|
| 3286 |
|
|
|
| 3287 |
|
|
free(pktopt, M_IP6OPT);
|
| 3288 |
|
|
}
|
| 3289 |
|
|
|
| 3290 |
|
|
/*
|
| 3291 |
|
|
* Set the IP6 multicast options in response to user setsockopt().
|
| 3292 |
|
|
*/
|
| 3293 |
|
|
static int
|
| 3294 |
|
|
ip6_setmoptions(optname, im6op, m)
|
| 3295 |
|
|
int optname;
|
| 3296 |
|
|
struct ip6_moptions **im6op;
|
| 3297 |
|
|
struct mbuf *m;
|
| 3298 |
|
|
{
|
| 3299 |
|
|
int error = 0;
|
| 3300 |
|
|
u_int loop, ifindex;
|
| 3301 |
|
|
struct ipv6_mreq *mreq;
|
| 3302 |
|
|
struct ifnet *ifp;
|
| 3303 |
|
|
struct ip6_moptions *im6o = *im6op;
|
| 3304 |
|
|
struct route ro;
|
| 3305 |
|
|
struct sockaddr_in6 *dst;
|
| 3306 |
|
|
struct in6_multi_mship *imm;
|
| 3307 |
|
|
|
| 3308 |
|
|
if (im6o == NULL) {
|
| 3309 |
|
|
/*
|
| 3310 |
|
|
* No multicast option buffer attached to the pcb;
|
| 3311 |
|
|
* allocate one and initialize to default values.
|
| 3312 |
|
|
*/
|
| 3313 |
|
|
im6o = (struct ip6_moptions *)
|
| 3314 |
|
|
malloc(sizeof(*im6o), M_IPMOPTS, M_WAITOK);
|
| 3315 |
|
|
*im6op = im6o;
|
| 3316 |
|
|
im6o->im6o_multicast_ifp = NULL;
|
| 3317 |
|
|
im6o->im6o_multicast_hlim = ip6_defmcasthlim;
|
| 3318 |
|
|
im6o->im6o_multicast_loop = IPV6_DEFAULT_MULTICAST_LOOP;
|
| 3319 |
|
|
LIST_INIT(&im6o->im6o_memberships);
|
| 3320 |
|
|
}
|
| 3321 |
|
|
|
| 3322 |
|
|
switch (optname) {
|
| 3323 |
|
|
|
| 3324 |
|
|
case IPV6_MULTICAST_IF:
|
| 3325 |
|
|
/*
|
| 3326 |
|
|
* Select the interface for outgoing multicast packets.
|
| 3327 |
|
|
*/
|
| 3328 |
|
|
if (m == NULL || m->m_len != sizeof(u_int)) {
|
| 3329 |
|
|
error = EINVAL;
|
| 3330 |
|
|
break;
|
| 3331 |
|
|
}
|
| 3332 |
|
|
bcopy(mtod(m, u_int *), &ifindex, sizeof(ifindex));
|
| 3333 |
|
|
if (ifindex < 0 || if_index < ifindex) {
|
| 3334 |
|
|
error = ENXIO; /* XXX EINVAL? */
|
| 3335 |
|
|
break;
|
| 3336 |
|
|
}
|
| 3337 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 3338 |
|
|
ifp = ifnet_byindex(ifindex);
|
| 3339 |
|
|
#else
|
| 3340 |
|
|
ifp = ifindex2ifnet[ifindex];
|
| 3341 |
|
|
#endif
|
| 3342 |
|
|
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
|
| 3343 |
|
|
error = EADDRNOTAVAIL;
|
| 3344 |
|
|
break;
|
| 3345 |
|
|
}
|
| 3346 |
|
|
im6o->im6o_multicast_ifp = ifp;
|
| 3347 |
|
|
break;
|
| 3348 |
|
|
|
| 3349 |
|
|
case IPV6_MULTICAST_HOPS:
|
| 3350 |
|
|
{
|
| 3351 |
|
|
/*
|
| 3352 |
|
|
* Set the IP6 hoplimit for outgoing multicast packets.
|
| 3353 |
|
|
*/
|
| 3354 |
|
|
int optval;
|
| 3355 |
|
|
if (m == NULL || m->m_len != sizeof(int)) {
|
| 3356 |
|
|
error = EINVAL;
|
| 3357 |
|
|
break;
|
| 3358 |
|
|
}
|
| 3359 |
|
|
bcopy(mtod(m, u_int *), &optval, sizeof(optval));
|
| 3360 |
|
|
if (optval < -1 || optval >= 256)
|
| 3361 |
|
|
error = EINVAL;
|
| 3362 |
|
|
else if (optval == -1)
|
| 3363 |
|
|
im6o->im6o_multicast_hlim = ip6_defmcasthlim;
|
| 3364 |
|
|
else
|
| 3365 |
|
|
im6o->im6o_multicast_hlim = optval;
|
| 3366 |
|
|
break;
|
| 3367 |
|
|
}
|
| 3368 |
|
|
|
| 3369 |
|
|
case IPV6_MULTICAST_LOOP:
|
| 3370 |
|
|
/*
|
| 3371 |
|
|
* Set the loopback flag for outgoing multicast packets.
|
| 3372 |
|
|
* Must be zero or one.
|
| 3373 |
|
|
*/
|
| 3374 |
|
|
if (m == NULL || m->m_len != sizeof(u_int)) {
|
| 3375 |
|
|
error = EINVAL;
|
| 3376 |
|
|
break;
|
| 3377 |
|
|
}
|
| 3378 |
|
|
bcopy(mtod(m, u_int *), &loop, sizeof(loop));
|
| 3379 |
|
|
if (loop > 1) {
|
| 3380 |
|
|
error = EINVAL;
|
| 3381 |
|
|
break;
|
| 3382 |
|
|
}
|
| 3383 |
|
|
im6o->im6o_multicast_loop = loop;
|
| 3384 |
|
|
break;
|
| 3385 |
|
|
|
| 3386 |
|
|
case IPV6_JOIN_GROUP:
|
| 3387 |
|
|
/*
|
| 3388 |
|
|
* Add a multicast group membership.
|
| 3389 |
|
|
* Group must be a valid IP6 multicast address.
|
| 3390 |
|
|
*/
|
| 3391 |
|
|
if (m == NULL || m->m_len != sizeof(struct ipv6_mreq)) {
|
| 3392 |
|
|
error = EINVAL;
|
| 3393 |
|
|
break;
|
| 3394 |
|
|
}
|
| 3395 |
|
|
mreq = mtod(m, struct ipv6_mreq *);
|
| 3396 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)) {
|
| 3397 |
|
|
/*
|
| 3398 |
|
|
* We use the unspecified address to specify to accept
|
| 3399 |
|
|
* all multicast addresses. Only super user is allowed
|
| 3400 |
|
|
* to do this.
|
| 3401 |
|
|
*/
|
| 3402 |
|
|
} else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)) {
|
| 3403 |
|
|
error = EINVAL;
|
| 3404 |
|
|
break;
|
| 3405 |
|
|
}
|
| 3406 |
|
|
|
| 3407 |
|
|
/*
|
| 3408 |
|
|
* If the interface is specified, validate it.
|
| 3409 |
|
|
*/
|
| 3410 |
|
|
if (mreq->ipv6mr_interface < 0
|
| 3411 |
|
|
|| if_index < mreq->ipv6mr_interface) {
|
| 3412 |
|
|
error = ENXIO; /* XXX EINVAL? */
|
| 3413 |
|
|
break;
|
| 3414 |
|
|
}
|
| 3415 |
|
|
/*
|
| 3416 |
|
|
* If no interface was explicitly specified, choose an
|
| 3417 |
|
|
* appropriate one according to the given multicast address.
|
| 3418 |
|
|
*/
|
| 3419 |
|
|
if (mreq->ipv6mr_interface == 0) {
|
| 3420 |
|
|
/*
|
| 3421 |
|
|
* Look up the routing table for the
|
| 3422 |
|
|
* address, and choose the outgoing interface.
|
| 3423 |
|
|
* XXX: is it a good approach?
|
| 3424 |
|
|
*/
|
| 3425 |
|
|
ro.ro_rt = NULL;
|
| 3426 |
|
|
dst = (struct sockaddr_in6 *)&ro.ro_dst;
|
| 3427 |
|
|
bzero(dst, sizeof(*dst));
|
| 3428 |
|
|
dst->sin6_len = sizeof(struct sockaddr_in6);
|
| 3429 |
|
|
dst->sin6_family = AF_INET6;
|
| 3430 |
|
|
dst->sin6_addr = mreq->ipv6mr_multiaddr;
|
| 3431 |
|
|
rtalloc((struct route *)&ro);
|
| 3432 |
|
|
if (ro.ro_rt == NULL) {
|
| 3433 |
|
|
error = EADDRNOTAVAIL;
|
| 3434 |
|
|
break;
|
| 3435 |
|
|
}
|
| 3436 |
|
|
ifp = ro.ro_rt->rt_ifp;
|
| 3437 |
|
|
rtfree(ro.ro_rt);
|
| 3438 |
|
|
} else {
|
| 3439 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 3440 |
|
|
ifp = ifnet_byindex(mreq->ipv6mr_interface);
|
| 3441 |
|
|
#else
|
| 3442 |
|
|
ifp = ifindex2ifnet[mreq->ipv6mr_interface];
|
| 3443 |
|
|
#endif
|
| 3444 |
|
|
}
|
| 3445 |
|
|
|
| 3446 |
|
|
/*
|
| 3447 |
|
|
* See if we found an interface, and confirm that it
|
| 3448 |
|
|
* supports multicast
|
| 3449 |
|
|
*/
|
| 3450 |
|
|
if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
|
| 3451 |
|
|
error = EADDRNOTAVAIL;
|
| 3452 |
|
|
break;
|
| 3453 |
|
|
}
|
| 3454 |
|
|
/*
|
| 3455 |
|
|
* Put interface index into the multicast address,
|
| 3456 |
|
|
* if the address has interface/link-local scope.
|
| 3457 |
|
|
* XXX: the embedded form is a KAME-local hack.
|
| 3458 |
|
|
*/
|
| 3459 |
|
|
if (IN6_IS_ADDR_MC_INTFACELOCAL(&mreq->ipv6mr_multiaddr) ||
|
| 3460 |
|
|
IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)) {
|
| 3461 |
|
|
mreq->ipv6mr_multiaddr.s6_addr16[1]
|
| 3462 |
|
|
= htons(mreq->ipv6mr_interface);
|
| 3463 |
|
|
}
|
| 3464 |
|
|
/*
|
| 3465 |
|
|
* See if the membership already exists.
|
| 3466 |
|
|
*/
|
| 3467 |
|
|
for (imm = im6o->im6o_memberships.lh_first;
|
| 3468 |
|
|
imm != NULL; imm = imm->i6mm_chain.le_next)
|
| 3469 |
|
|
if (imm->i6mm_maddr->in6m_ifp == ifp &&
|
| 3470 |
|
|
IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
|
| 3471 |
|
|
&mreq->ipv6mr_multiaddr))
|
| 3472 |
|
|
break;
|
| 3473 |
|
|
if (imm != NULL) {
|
| 3474 |
|
|
error = EADDRINUSE;
|
| 3475 |
|
|
break;
|
| 3476 |
|
|
}
|
| 3477 |
|
|
/*
|
| 3478 |
|
|
* Everything looks good; add a new record to the multicast
|
| 3479 |
|
|
* address list for the given interface.
|
| 3480 |
|
|
*/
|
| 3481 |
|
|
imm = in6_joingroup(ifp, &mreq->ipv6mr_multiaddr, &error);
|
| 3482 |
|
|
if (!imm)
|
| 3483 |
|
|
break;
|
| 3484 |
|
|
LIST_INSERT_HEAD(&im6o->im6o_memberships, imm, i6mm_chain);
|
| 3485 |
|
|
break;
|
| 3486 |
|
|
|
| 3487 |
|
|
case IPV6_LEAVE_GROUP:
|
| 3488 |
|
|
/*
|
| 3489 |
|
|
* Drop a multicast group membership.
|
| 3490 |
|
|
* Group must be a valid IP6 multicast address.
|
| 3491 |
|
|
*/
|
| 3492 |
|
|
if (m == NULL || m->m_len != sizeof(struct ipv6_mreq)) {
|
| 3493 |
|
|
error = EINVAL;
|
| 3494 |
|
|
break;
|
| 3495 |
|
|
}
|
| 3496 |
|
|
mreq = mtod(m, struct ipv6_mreq *);
|
| 3497 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)) {
|
| 3498 |
|
|
} else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)) {
|
| 3499 |
|
|
error = EINVAL;
|
| 3500 |
|
|
break;
|
| 3501 |
|
|
}
|
| 3502 |
|
|
/*
|
| 3503 |
|
|
* If an interface address was specified, get a pointer
|
| 3504 |
|
|
* to its ifnet structure.
|
| 3505 |
|
|
*/
|
| 3506 |
|
|
if (mreq->ipv6mr_interface < 0
|
| 3507 |
|
|
|| if_index < mreq->ipv6mr_interface) {
|
| 3508 |
|
|
error = ENXIO; /* XXX EINVAL? */
|
| 3509 |
|
|
break;
|
| 3510 |
|
|
}
|
| 3511 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 3512 |
|
|
ifp = ifnet_byindex(mreq->ipv6mr_interface);
|
| 3513 |
|
|
#else
|
| 3514 |
|
|
ifp = ifindex2ifnet[mreq->ipv6mr_interface];
|
| 3515 |
|
|
#endif
|
| 3516 |
|
|
/*
|
| 3517 |
|
|
* Put interface index into the multicast address,
|
| 3518 |
|
|
* if the address has interface/link-local scope.
|
| 3519 |
|
|
*/
|
| 3520 |
|
|
if (IN6_IS_ADDR_MC_INTFACELOCAL(&mreq->ipv6mr_multiaddr) ||
|
| 3521 |
|
|
IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)) {
|
| 3522 |
|
|
mreq->ipv6mr_multiaddr.s6_addr16[1]
|
| 3523 |
|
|
= htons(mreq->ipv6mr_interface);
|
| 3524 |
|
|
}
|
| 3525 |
|
|
/*
|
| 3526 |
|
|
* Find the membership in the membership list.
|
| 3527 |
|
|
*/
|
| 3528 |
|
|
for (imm = im6o->im6o_memberships.lh_first;
|
| 3529 |
|
|
imm != NULL; imm = imm->i6mm_chain.le_next) {
|
| 3530 |
|
|
if ((ifp == NULL ||
|
| 3531 |
|
|
imm->i6mm_maddr->in6m_ifp == ifp) &&
|
| 3532 |
|
|
IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
|
| 3533 |
|
|
&mreq->ipv6mr_multiaddr))
|
| 3534 |
|
|
break;
|
| 3535 |
|
|
}
|
| 3536 |
|
|
if (imm == NULL) {
|
| 3537 |
|
|
/* Unable to resolve interface */
|
| 3538 |
|
|
error = EADDRNOTAVAIL;
|
| 3539 |
|
|
break;
|
| 3540 |
|
|
}
|
| 3541 |
|
|
/*
|
| 3542 |
|
|
* Give up the multicast address record to which the
|
| 3543 |
|
|
* membership points.
|
| 3544 |
|
|
*/
|
| 3545 |
|
|
LIST_REMOVE(imm, i6mm_chain);
|
| 3546 |
|
|
in6_leavegroup(imm);
|
| 3547 |
|
|
break;
|
| 3548 |
|
|
|
| 3549 |
|
|
default:
|
| 3550 |
|
|
error = EOPNOTSUPP;
|
| 3551 |
|
|
break;
|
| 3552 |
|
|
}
|
| 3553 |
|
|
|
| 3554 |
|
|
/*
|
| 3555 |
|
|
* If all options have default values, no need to keep the mbuf.
|
| 3556 |
|
|
*/
|
| 3557 |
|
|
if (im6o->im6o_multicast_ifp == NULL &&
|
| 3558 |
|
|
im6o->im6o_multicast_hlim == ip6_defmcasthlim &&
|
| 3559 |
|
|
im6o->im6o_multicast_loop == IPV6_DEFAULT_MULTICAST_LOOP &&
|
| 3560 |
|
|
im6o->im6o_memberships.lh_first == NULL) {
|
| 3561 |
|
|
free(*im6op, M_IPMOPTS);
|
| 3562 |
|
|
*im6op = NULL;
|
| 3563 |
|
|
}
|
| 3564 |
|
|
|
| 3565 |
|
|
return(error);
|
| 3566 |
|
|
}
|
| 3567 |
|
|
|
| 3568 |
|
|
/*
|
| 3569 |
|
|
* Return the IP6 multicast options in response to user getsockopt().
|
| 3570 |
|
|
*/
|
| 3571 |
|
|
static int
|
| 3572 |
|
|
ip6_getmoptions(optname, im6o, mp)
|
| 3573 |
|
|
int optname;
|
| 3574 |
|
|
struct ip6_moptions *im6o;
|
| 3575 |
|
|
struct mbuf **mp;
|
| 3576 |
|
|
{
|
| 3577 |
|
|
u_int *hlim, *loop, *ifindex;
|
| 3578 |
|
|
|
| 3579 |
|
|
#ifdef __FreeBSD__
|
| 3580 |
|
|
*mp = m_get(M_WAIT, MT_HEADER); /* XXX */
|
| 3581 |
|
|
#else
|
| 3582 |
|
|
*mp = m_get(M_WAIT, MT_SOOPTS);
|
| 3583 |
|
|
#endif
|
| 3584 |
|
|
|
| 3585 |
|
|
switch (optname) {
|
| 3586 |
|
|
|
| 3587 |
|
|
case IPV6_MULTICAST_IF:
|
| 3588 |
|
|
ifindex = mtod(*mp, u_int *);
|
| 3589 |
|
|
(*mp)->m_len = sizeof(u_int);
|
| 3590 |
|
|
if (im6o == NULL || im6o->im6o_multicast_ifp == NULL)
|
| 3591 |
|
|
*ifindex = 0;
|
| 3592 |
|
|
else
|
| 3593 |
|
|
*ifindex = im6o->im6o_multicast_ifp->if_index;
|
| 3594 |
|
|
return(0);
|
| 3595 |
|
|
|
| 3596 |
|
|
case IPV6_MULTICAST_HOPS:
|
| 3597 |
|
|
hlim = mtod(*mp, u_int *);
|
| 3598 |
|
|
(*mp)->m_len = sizeof(u_int);
|
| 3599 |
|
|
if (im6o == NULL)
|
| 3600 |
|
|
*hlim = ip6_defmcasthlim;
|
| 3601 |
|
|
else
|
| 3602 |
|
|
*hlim = im6o->im6o_multicast_hlim;
|
| 3603 |
|
|
return(0);
|
| 3604 |
|
|
|
| 3605 |
|
|
case IPV6_MULTICAST_LOOP:
|
| 3606 |
|
|
loop = mtod(*mp, u_int *);
|
| 3607 |
|
|
(*mp)->m_len = sizeof(u_int);
|
| 3608 |
|
|
if (im6o == NULL)
|
| 3609 |
|
|
*loop = ip6_defmcasthlim;
|
| 3610 |
|
|
else
|
| 3611 |
|
|
*loop = im6o->im6o_multicast_loop;
|
| 3612 |
|
|
return(0);
|
| 3613 |
|
|
|
| 3614 |
|
|
default:
|
| 3615 |
|
|
return(EOPNOTSUPP);
|
| 3616 |
|
|
}
|
| 3617 |
|
|
}
|
| 3618 |
|
|
|
| 3619 |
|
|
/*
|
| 3620 |
|
|
* Discard the IP6 multicast options.
|
| 3621 |
|
|
*/
|
| 3622 |
|
|
void
|
| 3623 |
|
|
ip6_freemoptions(im6o)
|
| 3624 |
|
|
struct ip6_moptions *im6o;
|
| 3625 |
|
|
{
|
| 3626 |
|
|
struct in6_multi_mship *imm;
|
| 3627 |
|
|
|
| 3628 |
|
|
if (im6o == NULL)
|
| 3629 |
|
|
return;
|
| 3630 |
|
|
|
| 3631 |
|
|
while ((imm = im6o->im6o_memberships.lh_first) != NULL) {
|
| 3632 |
|
|
LIST_REMOVE(imm, i6mm_chain);
|
| 3633 |
|
|
in6_leavegroup(imm);
|
| 3634 |
|
|
}
|
| 3635 |
|
|
free(im6o, M_IPMOPTS);
|
| 3636 |
|
|
}
|
| 3637 |
|
|
|
| 3638 |
|
|
/*
|
| 3639 |
|
|
* Set IPv6 outgoing packet options based on advanced API.
|
| 3640 |
|
|
*/
|
| 3641 |
|
|
int
|
| 3642 |
|
|
ip6_setpktoptions(control, opt, stickyopt, priv, needcopy)
|
| 3643 |
|
|
struct mbuf *control;
|
| 3644 |
|
|
struct ip6_pktopts *opt, *stickyopt;
|
| 3645 |
|
|
int priv, needcopy;
|
| 3646 |
|
|
{
|
| 3647 |
|
|
struct cmsghdr *cm = 0;
|
| 3648 |
|
|
|
| 3649 |
|
|
if (control == 0 || opt == 0)
|
| 3650 |
|
|
return(EINVAL);
|
| 3651 |
|
|
|
| 3652 |
|
|
if (stickyopt) {
|
| 3653 |
|
|
/*
|
| 3654 |
|
|
* If stickyopt is provided, make a local copy of the options
|
| 3655 |
|
|
* for this particular packet, then override them by ancillary
|
| 3656 |
|
|
* objects.
|
| 3657 |
|
|
* XXX: need to gain a reference for the cached route of the
|
| 3658 |
|
|
* next hop in case of the overriding.
|
| 3659 |
|
|
*/
|
| 3660 |
|
|
*opt = *stickyopt;
|
| 3661 |
|
|
if (opt->ip6po_nextroute.ro_rt)
|
| 3662 |
|
|
opt->ip6po_nextroute.ro_rt->rt_refcnt++;
|
| 3663 |
|
|
} else
|
| 3664 |
|
|
init_ip6pktopts(opt);
|
| 3665 |
|
|
opt->needfree = needcopy;
|
| 3666 |
|
|
|
| 3667 |
|
|
/*
|
| 3668 |
|
|
* XXX: Currently, we assume all the optional information is stored
|
| 3669 |
|
|
* in a single mbuf.
|
| 3670 |
|
|
*/
|
| 3671 |
|
|
if (control->m_next)
|
| 3672 |
|
|
return(EINVAL);
|
| 3673 |
|
|
|
| 3674 |
|
|
for (; control->m_len; control->m_data += CMSG_ALIGN(cm->cmsg_len),
|
| 3675 |
|
|
control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
|
| 3676 |
|
|
int error;
|
| 3677 |
|
|
|
| 3678 |
|
|
if (control->m_len < CMSG_LEN(0))
|
| 3679 |
|
|
return(EINVAL);
|
| 3680 |
|
|
|
| 3681 |
|
|
cm = mtod(control, struct cmsghdr *);
|
| 3682 |
|
|
if (cm->cmsg_len == 0 || cm->cmsg_len > control->m_len)
|
| 3683 |
|
|
return(EINVAL);
|
| 3684 |
|
|
if (cm->cmsg_level != IPPROTO_IPV6)
|
| 3685 |
|
|
continue;
|
| 3686 |
|
|
|
| 3687 |
|
|
error = ip6_setpktoption(cm->cmsg_type, CMSG_DATA(cm),
|
| 3688 |
|
|
cm->cmsg_len - CMSG_LEN(0),
|
| 3689 |
|
|
opt, priv, needcopy, 1);
|
| 3690 |
|
|
if (error)
|
| 3691 |
|
|
return(error);
|
| 3692 |
|
|
}
|
| 3693 |
|
|
|
| 3694 |
|
|
return(0);
|
| 3695 |
|
|
}
|
| 3696 |
|
|
|
| 3697 |
|
|
/*
|
| 3698 |
|
|
* Set a particular packet option, as a sticky option or an ancillary data
|
| 3699 |
|
|
* item. "len" can be 0 only when it's a sticky option.
|
| 3700 |
|
|
* We have 4 cases of combination of "sticky" and "cmsg":
|
| 3701 |
|
|
* "sticky=0, cmsg=0": impossible
|
| 3702 |
|
|
* "sticky=0, cmsg=1": RFC2292 or rfc2292bis ancillary data
|
| 3703 |
|
|
* "sticky=1, cmsg=0": rfc2292bis socket option
|
| 3704 |
|
|
* "sticky=1, cmsg=1": RFC2292 socket option
|
| 3705 |
|
|
*/
|
| 3706 |
|
|
static int
|
| 3707 |
|
|
ip6_setpktoption(optname, buf, len, opt, priv, sticky, cmsg)
|
| 3708 |
|
|
int optname, len, priv, cmsg;
|
| 3709 |
|
|
u_char *buf;
|
| 3710 |
|
|
struct ip6_pktopts *opt;
|
| 3711 |
|
|
int sticky;
|
| 3712 |
|
|
{
|
| 3713 |
|
|
if (!sticky && !cmsg) {
|
| 3714 |
|
|
#ifdef DIAGNOSTIC
|
| 3715 |
|
|
printf("ip6_setpktoption: impossible case\n");
|
| 3716 |
|
|
#endif
|
| 3717 |
|
|
return(EINVAL);
|
| 3718 |
|
|
}
|
| 3719 |
|
|
|
| 3720 |
|
|
/*
|
| 3721 |
|
|
* IPV6_2292xxx is for backward compatibility to RFC2292, and should
|
| 3722 |
|
|
* not be specified in the context of rfc2292bis. Conversely,
|
| 3723 |
|
|
* rfc2292bis types should not be specified in the context of RFC2292.
|
| 3724 |
|
|
*
|
| 3725 |
|
|
*/
|
| 3726 |
|
|
if (!cmsg) {
|
| 3727 |
|
|
switch (optname) {
|
| 3728 |
|
|
case IPV6_2292PKTINFO:
|
| 3729 |
|
|
case IPV6_2292HOPLIMIT:
|
| 3730 |
|
|
case IPV6_2292NEXTHOP:
|
| 3731 |
|
|
case IPV6_2292HOPOPTS:
|
| 3732 |
|
|
case IPV6_2292DSTOPTS:
|
| 3733 |
|
|
case IPV6_2292RTHDR:
|
| 3734 |
|
|
case IPV6_2292PKTOPTIONS:
|
| 3735 |
|
|
return(ENOPROTOOPT);
|
| 3736 |
|
|
}
|
| 3737 |
|
|
}
|
| 3738 |
|
|
if (sticky && cmsg) {
|
| 3739 |
|
|
switch (optname) {
|
| 3740 |
|
|
case IPV6_PKTINFO:
|
| 3741 |
|
|
case IPV6_HOPLIMIT:
|
| 3742 |
|
|
case IPV6_NEXTHOP:
|
| 3743 |
|
|
case IPV6_HOPOPTS:
|
| 3744 |
|
|
case IPV6_DSTOPTS:
|
| 3745 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 3746 |
|
|
case IPV6_RTHDR:
|
| 3747 |
|
|
case IPV6_REACHCONF:
|
| 3748 |
|
|
case IPV6_USE_MIN_MTU:
|
| 3749 |
|
|
case IPV6_DONTFRAG:
|
| 3750 |
|
|
case IPV6_OTCLASS:
|
| 3751 |
|
|
case IPV6_TCLASS:
|
| 3752 |
|
|
return(ENOPROTOOPT);
|
| 3753 |
|
|
}
|
| 3754 |
|
|
}
|
| 3755 |
|
|
|
| 3756 |
|
|
switch (optname) {
|
| 3757 |
|
|
case IPV6_2292PKTINFO:
|
| 3758 |
|
|
case IPV6_PKTINFO:
|
| 3759 |
|
|
{
|
| 3760 |
|
|
struct ifnet *ifp = NULL;
|
| 3761 |
|
|
struct in6_pktinfo *pktinfo;
|
| 3762 |
|
|
|
| 3763 |
|
|
if (len != sizeof(struct in6_pktinfo))
|
| 3764 |
|
|
return(EINVAL);
|
| 3765 |
|
|
|
| 3766 |
|
|
pktinfo = (struct in6_pktinfo *)buf;
|
| 3767 |
|
|
|
| 3768 |
|
|
/*
|
| 3769 |
|
|
* An application can clear any sticky IPV6_PKTINFO option by
|
| 3770 |
|
|
* doing a "regular" setsockopt with ipi6_addr being
|
| 3771 |
|
|
* in6addr_any and ipi6_ifindex being zero.
|
| 3772 |
|
|
* [rfc2292bis-02, Section 6]
|
| 3773 |
|
|
*/
|
| 3774 |
|
|
if (optname == IPV6_PKTINFO && opt->ip6po_pktinfo) {
|
| 3775 |
|
|
if (pktinfo->ipi6_ifindex == 0 &&
|
| 3776 |
|
|
IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
|
| 3777 |
|
|
ip6_clearpktopts(opt, optname);
|
| 3778 |
|
|
break;
|
| 3779 |
|
|
}
|
| 3780 |
|
|
}
|
| 3781 |
|
|
|
| 3782 |
|
|
/* validate the interface index if specified. */
|
| 3783 |
|
|
if (pktinfo->ipi6_ifindex > if_index ||
|
| 3784 |
|
|
pktinfo->ipi6_ifindex < 0) {
|
| 3785 |
|
|
return(ENXIO);
|
| 3786 |
|
|
}
|
| 3787 |
|
|
if (pktinfo->ipi6_ifindex) {
|
| 3788 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 5
|
| 3789 |
|
|
ifp = ifnet_byindex(pktinfo->ipi6_ifindex);
|
| 3790 |
|
|
#else
|
| 3791 |
|
|
ifp = ifindex2ifnet[pktinfo->ipi6_ifindex];
|
| 3792 |
|
|
#endif
|
| 3793 |
|
|
if (ifp == NULL)
|
| 3794 |
|
|
return(ENXIO);
|
| 3795 |
|
|
}
|
| 3796 |
|
|
|
| 3797 |
|
|
/*
|
| 3798 |
|
|
* We store the address anyway, and let in6_selectsrc()
|
| 3799 |
|
|
* validate the specified address. This is because ipi6_addr
|
| 3800 |
|
|
* may not have enough information about its scope zone, and
|
| 3801 |
|
|
* we may need additional information (such as outgoing
|
| 3802 |
|
|
* interface or the scope zone of a destination address) to
|
| 3803 |
|
|
* disambiguate the scope.
|
| 3804 |
|
|
* XXX: the delay of the validation may confuse the
|
| 3805 |
|
|
* application when it is used as a sticky option.
|
| 3806 |
|
|
*/
|
| 3807 |
|
|
if (sticky) {
|
| 3808 |
|
|
if (opt->ip6po_pktinfo == NULL) {
|
| 3809 |
|
|
opt->ip6po_pktinfo = malloc(sizeof(*pktinfo),
|
| 3810 |
|
|
M_IP6OPT,
|
| 3811 |
|
|
M_WAITOK);
|
| 3812 |
|
|
}
|
| 3813 |
|
|
bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo));
|
| 3814 |
|
|
} else
|
| 3815 |
|
|
opt->ip6po_pktinfo = pktinfo;
|
| 3816 |
|
|
break;
|
| 3817 |
|
|
}
|
| 3818 |
|
|
|
| 3819 |
|
|
case IPV6_2292HOPLIMIT:
|
| 3820 |
|
|
case IPV6_HOPLIMIT:
|
| 3821 |
|
|
{
|
| 3822 |
|
|
int *hlimp;
|
| 3823 |
|
|
|
| 3824 |
|
|
/*
|
| 3825 |
|
|
* rfc2292bis-03 obsoleted the usage of sticky IPV6_HOPLIMIT
|
| 3826 |
|
|
* to simplify the ordering among hoplimit options.
|
| 3827 |
|
|
*/
|
| 3828 |
|
|
if (optname == IPV6_HOPLIMIT && sticky)
|
| 3829 |
|
|
return(ENOPROTOOPT);
|
| 3830 |
|
|
|
| 3831 |
|
|
if (len != sizeof(int))
|
| 3832 |
|
|
return(EINVAL);
|
| 3833 |
|
|
hlimp = (int *)buf;
|
| 3834 |
|
|
if (*hlimp < -1 || *hlimp > 255)
|
| 3835 |
|
|
return(EINVAL);
|
| 3836 |
|
|
|
| 3837 |
|
|
opt->ip6po_hlim = *hlimp;
|
| 3838 |
|
|
break;
|
| 3839 |
|
|
}
|
| 3840 |
|
|
|
| 3841 |
|
|
case IPV6_OTCLASS:
|
| 3842 |
|
|
if (len != sizeof(u_int8_t))
|
| 3843 |
|
|
return(EINVAL);
|
| 3844 |
|
|
|
| 3845 |
|
|
opt->ip6po_tclass = *(u_int8_t *)buf;
|
| 3846 |
|
|
break;
|
| 3847 |
|
|
|
| 3848 |
|
|
case IPV6_TCLASS:
|
| 3849 |
|
|
{
|
| 3850 |
|
|
int tclass;
|
| 3851 |
|
|
|
| 3852 |
|
|
if (len != sizeof(int))
|
| 3853 |
|
|
return(EINVAL);
|
| 3854 |
|
|
tclass = *(int *)buf;
|
| 3855 |
|
|
if (tclass < -1 || tclass > 255)
|
| 3856 |
|
|
return(EINVAL);
|
| 3857 |
|
|
|
| 3858 |
|
|
opt->ip6po_tclass = tclass;
|
| 3859 |
|
|
break;
|
| 3860 |
|
|
}
|
| 3861 |
|
|
|
| 3862 |
|
|
case IPV6_2292NEXTHOP:
|
| 3863 |
|
|
case IPV6_NEXTHOP:
|
| 3864 |
|
|
|
| 3865 |
|
|
if (len == 0) { /* just remove the option */
|
| 3866 |
|
|
ip6_clearpktopts(opt, IPV6_NEXTHOP);
|
| 3867 |
|
|
break;
|
| 3868 |
|
|
}
|
| 3869 |
|
|
|
| 3870 |
|
|
/* check if cmsg_len is large enough for sa_len */
|
| 3871 |
|
|
if (len < sizeof(struct sockaddr) || len < *buf)
|
| 3872 |
|
|
return(EINVAL);
|
| 3873 |
|
|
|
| 3874 |
|
|
switch (((struct sockaddr *)buf)->sa_family) {
|
| 3875 |
|
|
case AF_INET6:
|
| 3876 |
|
|
{
|
| 3877 |
|
|
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)buf;
|
| 3878 |
|
|
int error;
|
| 3879 |
|
|
|
| 3880 |
|
|
if (sa6->sin6_len != sizeof(struct sockaddr_in6))
|
| 3881 |
|
|
return(EINVAL);
|
| 3882 |
|
|
|
| 3883 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr) ||
|
| 3884 |
|
|
IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)) {
|
| 3885 |
|
|
return(EINVAL);
|
| 3886 |
|
|
}
|
| 3887 |
|
|
if ((error = scope6_check_id(sa6, ip6_use_defzone))
|
| 3888 |
|
|
!= 0) {
|
| 3889 |
|
|
return(error);
|
| 3890 |
|
|
}
|
| 3891 |
|
|
#ifndef SCOPEDROUTING
|
| 3892 |
|
|
sa6->sin6_scope_id = 0; /* XXX */
|
| 3893 |
|
|
#endif
|
| 3894 |
|
|
break;
|
| 3895 |
|
|
}
|
| 3896 |
|
|
case AF_LINK: /* should eventually be supported */
|
| 3897 |
|
|
default:
|
| 3898 |
|
|
return(EAFNOSUPPORT);
|
| 3899 |
|
|
}
|
| 3900 |
|
|
|
| 3901 |
|
|
/* turn off the previous option, then set the new option. */
|
| 3902 |
|
|
ip6_clearpktopts(opt, IPV6_NEXTHOP);
|
| 3903 |
|
|
if (sticky) {
|
| 3904 |
|
|
opt->ip6po_nexthop = malloc(*buf, M_IP6OPT, M_WAITOK);
|
| 3905 |
|
|
bcopy(buf, opt->ip6po_nexthop, *buf);
|
| 3906 |
|
|
} else
|
| 3907 |
|
|
opt->ip6po_nexthop = (struct sockaddr *)buf;
|
| 3908 |
|
|
break;
|
| 3909 |
|
|
|
| 3910 |
|
|
case IPV6_2292HOPOPTS:
|
| 3911 |
|
|
case IPV6_HOPOPTS:
|
| 3912 |
|
|
{
|
| 3913 |
|
|
struct ip6_hbh *hbh;
|
| 3914 |
|
|
int hbhlen;
|
| 3915 |
|
|
|
| 3916 |
|
|
/*
|
| 3917 |
|
|
* XXX: We don't allow a non-privileged user to set ANY HbH
|
| 3918 |
|
|
* options, since per-option restriction has too much
|
| 3919 |
|
|
* overhead.
|
| 3920 |
|
|
*/
|
| 3921 |
|
|
|
| 3922 |
|
|
if (len == 0) {
|
| 3923 |
|
|
ip6_clearpktopts(opt, IPV6_HOPOPTS);
|
| 3924 |
|
|
break; /* just remove the option */
|
| 3925 |
|
|
}
|
| 3926 |
|
|
|
| 3927 |
|
|
/* message length validation */
|
| 3928 |
|
|
if (len < sizeof(struct ip6_hbh))
|
| 3929 |
|
|
return(EINVAL);
|
| 3930 |
|
|
hbh = (struct ip6_hbh *)buf;
|
| 3931 |
|
|
hbhlen = (hbh->ip6h_len + 1) << 3;
|
| 3932 |
|
|
if (len != hbhlen)
|
| 3933 |
|
|
return(EINVAL);
|
| 3934 |
|
|
|
| 3935 |
|
|
/* turn off the previous option, then set the new option. */
|
| 3936 |
|
|
ip6_clearpktopts(opt, IPV6_HOPOPTS);
|
| 3937 |
|
|
if (sticky) {
|
| 3938 |
|
|
opt->ip6po_hbh = malloc(hbhlen, M_IP6OPT, M_WAITOK);
|
| 3939 |
|
|
bcopy(hbh, opt->ip6po_hbh, hbhlen);
|
| 3940 |
|
|
} else
|
| 3941 |
|
|
opt->ip6po_hbh = hbh;
|
| 3942 |
|
|
|
| 3943 |
|
|
break;
|
| 3944 |
|
|
}
|
| 3945 |
|
|
|
| 3946 |
|
|
case IPV6_2292DSTOPTS:
|
| 3947 |
|
|
case IPV6_DSTOPTS:
|
| 3948 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 3949 |
|
|
{
|
| 3950 |
|
|
struct ip6_dest *dest, **newdest = NULL;
|
| 3951 |
|
|
int destlen;
|
| 3952 |
|
|
|
| 3953 |
|
|
|
| 3954 |
|
|
if (len == 0) {
|
| 3955 |
|
|
ip6_clearpktopts(opt, optname);
|
| 3956 |
|
|
break; /* just remove the option */
|
| 3957 |
|
|
}
|
| 3958 |
|
|
|
| 3959 |
|
|
/* message length validation */
|
| 3960 |
|
|
if (len < sizeof(struct ip6_dest))
|
| 3961 |
|
|
return(EINVAL);
|
| 3962 |
|
|
dest = (struct ip6_dest *)buf;
|
| 3963 |
|
|
destlen = (dest->ip6d_len + 1) << 3;
|
| 3964 |
|
|
if (len != destlen)
|
| 3965 |
|
|
return(EINVAL);
|
| 3966 |
|
|
|
| 3967 |
|
|
/*
|
| 3968 |
|
|
* Determine the position that the destination options header
|
| 3969 |
|
|
* should be inserted; before or after the routing header.
|
| 3970 |
|
|
*/
|
| 3971 |
|
|
switch (optname) {
|
| 3972 |
|
|
case IPV6_2292DSTOPTS:
|
| 3973 |
|
|
/*
|
| 3974 |
|
|
* The old advacned API is ambiguous on this point.
|
| 3975 |
|
|
* Our approach is to determine the position based
|
| 3976 |
|
|
* according to the existence of a routing header.
|
| 3977 |
|
|
* Note, however, that this depends on the order of the
|
| 3978 |
|
|
* extension headers in the ancillary data; the 1st
|
| 3979 |
|
|
* part of the destination options header must appear
|
| 3980 |
|
|
* before the routing header in the ancillary data,
|
| 3981 |
|
|
* too.
|
| 3982 |
|
|
* RFC2292bis solved the ambiguity by introducing
|
| 3983 |
|
|
* separate ancillary data or option types.
|
| 3984 |
|
|
*/
|
| 3985 |
|
|
if (opt->ip6po_rthdr == NULL)
|
| 3986 |
|
|
newdest = &opt->ip6po_dest1;
|
| 3987 |
|
|
else
|
| 3988 |
|
|
newdest = &opt->ip6po_dest2;
|
| 3989 |
|
|
break;
|
| 3990 |
|
|
case IPV6_RTHDRDSTOPTS:
|
| 3991 |
|
|
newdest = &opt->ip6po_dest1;
|
| 3992 |
|
|
break;
|
| 3993 |
|
|
case IPV6_DSTOPTS:
|
| 3994 |
|
|
newdest = &opt->ip6po_dest2;
|
| 3995 |
|
|
break;
|
| 3996 |
|
|
}
|
| 3997 |
|
|
|
| 3998 |
|
|
/* turn off the previous option, then set the new option. */
|
| 3999 |
|
|
ip6_clearpktopts(opt, optname);
|
| 4000 |
|
|
if (sticky) {
|
| 4001 |
|
|
*newdest = malloc(destlen, M_IP6OPT, M_WAITOK);
|
| 4002 |
|
|
bcopy(dest, *newdest, destlen);
|
| 4003 |
|
|
} else
|
| 4004 |
|
|
*newdest = dest;
|
| 4005 |
|
|
|
| 4006 |
|
|
break;
|
| 4007 |
|
|
}
|
| 4008 |
|
|
|
| 4009 |
|
|
case IPV6_2292RTHDR:
|
| 4010 |
|
|
case IPV6_RTHDR:
|
| 4011 |
|
|
{
|
| 4012 |
|
|
struct ip6_rthdr *rth;
|
| 4013 |
|
|
int rthlen;
|
| 4014 |
|
|
|
| 4015 |
|
|
if (len == 0) {
|
| 4016 |
|
|
ip6_clearpktopts(opt, IPV6_RTHDR);
|
| 4017 |
|
|
break; /* just remove the option */
|
| 4018 |
|
|
}
|
| 4019 |
|
|
|
| 4020 |
|
|
/* message length validation */
|
| 4021 |
|
|
if (len < sizeof(struct ip6_rthdr))
|
| 4022 |
|
|
return(EINVAL);
|
| 4023 |
|
|
rth = (struct ip6_rthdr *)buf;
|
| 4024 |
|
|
rthlen = (rth->ip6r_len + 1) << 3;
|
| 4025 |
|
|
if (len != rthlen)
|
| 4026 |
|
|
return(EINVAL);
|
| 4027 |
|
|
|
| 4028 |
|
|
switch (rth->ip6r_type) {
|
| 4029 |
|
|
case IPV6_RTHDR_TYPE_0:
|
| 4030 |
|
|
if (rth->ip6r_len == 0) /* must contain one addr */
|
| 4031 |
|
|
return(EINVAL);
|
| 4032 |
|
|
if (rth->ip6r_len % 2) /* length must be even */
|
| 4033 |
|
|
return(EINVAL);
|
| 4034 |
|
|
if (rth->ip6r_len / 2 != rth->ip6r_segleft)
|
| 4035 |
|
|
return(EINVAL);
|
| 4036 |
|
|
break;
|
| 4037 |
|
|
default:
|
| 4038 |
|
|
return(EINVAL); /* not supported */
|
| 4039 |
|
|
}
|
| 4040 |
|
|
|
| 4041 |
|
|
/* turn off the previous option */
|
| 4042 |
|
|
ip6_clearpktopts(opt, IPV6_RTHDR);
|
| 4043 |
|
|
if (sticky) {
|
| 4044 |
|
|
opt->ip6po_rthdr = malloc(rthlen, M_IP6OPT, M_WAITOK);
|
| 4045 |
|
|
bcopy(rth, opt->ip6po_rthdr, rthlen);
|
| 4046 |
|
|
} else
|
| 4047 |
|
|
opt->ip6po_rthdr = rth;
|
| 4048 |
|
|
|
| 4049 |
|
|
break;
|
| 4050 |
|
|
}
|
| 4051 |
|
|
|
| 4052 |
|
|
case IPV6_REACHCONF:
|
| 4053 |
|
|
if (!cmsg)
|
| 4054 |
|
|
return(ENOPROTOOPT);
|
| 4055 |
|
|
|
| 4056 |
|
|
#if 0
|
| 4057 |
|
|
/*
|
| 4058 |
|
|
* it looks dangerous to allow IPV6_REACHCONF to
|
| 4059 |
|
|
* normal user. it affects the ND state (system state)
|
| 4060 |
|
|
* and can affect communication by others - jinmei
|
| 4061 |
|
|
*/
|
| 4062 |
|
|
if (!priv)
|
| 4063 |
|
|
return(EPERM);
|
| 4064 |
|
|
#else
|
| 4065 |
|
|
/*
|
| 4066 |
|
|
* we limit max # of subsequent userland reachability
|
| 4067 |
|
|
* conformation by using ln->ln_byhint.
|
| 4068 |
|
|
*/
|
| 4069 |
|
|
#endif
|
| 4070 |
|
|
if (len)
|
| 4071 |
|
|
return(EINVAL);
|
| 4072 |
|
|
opt->ip6po_flags |= IP6PO_REACHCONF;
|
| 4073 |
|
|
break;
|
| 4074 |
|
|
|
| 4075 |
|
|
case IPV6_USE_MIN_MTU:
|
| 4076 |
|
|
case IPV6_DONTFRAG:
|
| 4077 |
|
|
{
|
| 4078 |
|
|
int on, flag = 0;
|
| 4079 |
|
|
|
| 4080 |
|
|
if (len != sizeof(int))
|
| 4081 |
|
|
return(EINVAL);
|
| 4082 |
|
|
on = *(int *)buf;
|
| 4083 |
|
|
|
| 4084 |
|
|
switch (optname) {
|
| 4085 |
|
|
case IPV6_USE_MIN_MTU:
|
| 4086 |
|
|
flag = IP6PO_MINMTU;
|
| 4087 |
|
|
break;
|
| 4088 |
|
|
case IPV6_DONTFRAG:
|
| 4089 |
|
|
flag = IP6PO_DONTFRAG;
|
| 4090 |
|
|
break;
|
| 4091 |
|
|
}
|
| 4092 |
|
|
|
| 4093 |
|
|
if (on)
|
| 4094 |
|
|
opt->ip6po_flags |= flag;
|
| 4095 |
|
|
else
|
| 4096 |
|
|
opt->ip6po_flags &= ~flag;
|
| 4097 |
|
|
break;
|
| 4098 |
|
|
}
|
| 4099 |
|
|
|
| 4100 |
|
|
default:
|
| 4101 |
|
|
return(ENOPROTOOPT);
|
| 4102 |
|
|
} /* end of switch */
|
| 4103 |
|
|
|
| 4104 |
|
|
return(0);
|
| 4105 |
|
|
}
|
| 4106 |
|
|
|
| 4107 |
|
|
/*
|
| 4108 |
|
|
* Routine called from ip6_output() to loop back a copy of an IP6 multicast
|
| 4109 |
|
|
* packet to the input queue of a specified interface. Note that this
|
| 4110 |
|
|
* calls the output routine of the loopback "driver", but with an interface
|
| 4111 |
|
|
* pointer that might NOT be &loif -- easier than replicating that code here.
|
| 4112 |
|
|
*/
|
| 4113 |
|
|
void
|
| 4114 |
|
|
ip6_mloopback(ifp, m, dst)
|
| 4115 |
|
|
struct ifnet *ifp;
|
| 4116 |
|
|
struct mbuf *m;
|
| 4117 |
|
|
struct sockaddr_in6 *dst;
|
| 4118 |
|
|
{
|
| 4119 |
|
|
struct mbuf *copym;
|
| 4120 |
|
|
struct ip6_hdr *ip6;
|
| 4121 |
|
|
|
| 4122 |
|
|
copym = m_copy(m, 0, M_COPYALL);
|
| 4123 |
|
|
if (copym == NULL)
|
| 4124 |
|
|
return;
|
| 4125 |
|
|
|
| 4126 |
|
|
/*
|
| 4127 |
|
|
* Make sure to deep-copy IPv6 header portion in case the data
|
| 4128 |
|
|
* is in an mbuf cluster, so that we can safely override the IPv6
|
| 4129 |
|
|
* header portion later.
|
| 4130 |
|
|
*/
|
| 4131 |
|
|
if ((copym->m_flags & M_EXT) != 0 ||
|
| 4132 |
|
|
copym->m_len < sizeof(struct ip6_hdr)) {
|
| 4133 |
|
|
copym = m_pullup(copym, sizeof(struct ip6_hdr));
|
| 4134 |
|
|
if (copym == NULL)
|
| 4135 |
|
|
return;
|
| 4136 |
|
|
}
|
| 4137 |
|
|
|
| 4138 |
|
|
#ifdef DIAGNOSTIC
|
| 4139 |
|
|
if (copym->m_len < sizeof(*ip6)) {
|
| 4140 |
|
|
m_freem(copym);
|
| 4141 |
|
|
return;
|
| 4142 |
|
|
}
|
| 4143 |
|
|
#endif
|
| 4144 |
|
|
|
| 4145 |
|
|
ip6 = mtod(copym, struct ip6_hdr *);
|
| 4146 |
|
|
#ifndef SCOPEDROUTING
|
| 4147 |
|
|
/*
|
| 4148 |
|
|
* clear embedded scope identifiers if necessary.
|
| 4149 |
|
|
* in6_clearscope will touch the addresses only when necessary.
|
| 4150 |
|
|
*/
|
| 4151 |
|
|
in6_clearscope(&ip6->ip6_src);
|
| 4152 |
|
|
in6_clearscope(&ip6->ip6_dst);
|
| 4153 |
|
|
#endif
|
| 4154 |
|
|
|
| 4155 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 4156 |
|
|
#if (__FreeBSD_version >= 410000)
|
| 4157 |
|
|
(void)if_simloop(ifp, copym, dst->sin6_family, (int)NULL);
|
| 4158 |
|
|
#else
|
| 4159 |
|
|
(void)if_simloop(ifp, copym, (struct sockaddr *)dst, NULL);
|
| 4160 |
|
|
#endif
|
| 4161 |
|
|
#else
|
| 4162 |
|
|
(void)looutput(ifp, copym, (struct sockaddr *)dst, NULL);
|
| 4163 |
|
|
#endif
|
| 4164 |
|
|
}
|
| 4165 |
|
|
|
| 4166 |
|
|
/*
|
| 4167 |
|
|
* Chop IPv6 header off from the payload.
|
| 4168 |
|
|
*/
|
| 4169 |
|
|
static int
|
| 4170 |
|
|
ip6_splithdr(m, exthdrs)
|
| 4171 |
|
|
struct mbuf *m;
|
| 4172 |
|
|
struct ip6_exthdrs *exthdrs;
|
| 4173 |
|
|
{
|
| 4174 |
|
|
struct mbuf *mh;
|
| 4175 |
|
|
struct ip6_hdr *ip6;
|
| 4176 |
|
|
|
| 4177 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 4178 |
|
|
if (m->m_len > sizeof(*ip6)) {
|
| 4179 |
|
|
MGETHDR(mh, M_DONTWAIT, MT_HEADER);
|
| 4180 |
|
|
if (mh == 0) {
|
| 4181 |
|
|
m_freem(m);
|
| 4182 |
|
|
return ENOBUFS;
|
| 4183 |
|
|
}
|
| 4184 |
|
|
#ifdef __OpenBSD__
|
| 4185 |
|
|
M_MOVE_PKTHDR(mh, m);
|
| 4186 |
|
|
#else
|
| 4187 |
|
|
M_COPY_PKTHDR(mh, m);
|
| 4188 |
|
|
#endif
|
| 4189 |
|
|
MH_ALIGN(mh, sizeof(*ip6));
|
| 4190 |
|
|
m->m_flags &= ~M_PKTHDR;
|
| 4191 |
|
|
m->m_len -= sizeof(*ip6);
|
| 4192 |
|
|
m->m_data += sizeof(*ip6);
|
| 4193 |
|
|
mh->m_next = m;
|
| 4194 |
|
|
m = mh;
|
| 4195 |
|
|
m->m_len = sizeof(*ip6);
|
| 4196 |
|
|
bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(*ip6));
|
| 4197 |
|
|
}
|
| 4198 |
|
|
exthdrs->ip6e_ip6 = m;
|
| 4199 |
|
|
return 0;
|
| 4200 |
|
|
}
|
| 4201 |
|
|
|
| 4202 |
|
|
/*
|
| 4203 |
|
|
* Compute IPv6 extension header length.
|
| 4204 |
|
|
*/
|
| 4205 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 4206 |
|
|
# define in6pcb inpcb
|
| 4207 |
|
|
# define in6p_outputopts inp_outputopts6
|
| 4208 |
|
|
#endif
|
| 4209 |
|
|
int
|
| 4210 |
|
|
ip6_optlen(in6p)
|
| 4211 |
|
|
struct in6pcb *in6p;
|
| 4212 |
|
|
{
|
| 4213 |
|
|
int len;
|
| 4214 |
|
|
|
| 4215 |
|
|
if (!in6p->in6p_outputopts)
|
| 4216 |
|
|
return 0;
|
| 4217 |
|
|
|
| 4218 |
|
|
len = 0;
|
| 4219 |
|
|
#define elen(x) \
|
| 4220 |
|
|
(((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)
|
| 4221 |
|
|
|
| 4222 |
|
|
len += elen(in6p->in6p_outputopts->ip6po_hbh);
|
| 4223 |
|
|
if (in6p->in6p_outputopts->ip6po_rthdr)
|
| 4224 |
|
|
/* dest1 is valid with rthdr only */
|
| 4225 |
|
|
len += elen(in6p->in6p_outputopts->ip6po_dest1);
|
| 4226 |
|
|
len += elen(in6p->in6p_outputopts->ip6po_rthdr);
|
| 4227 |
|
|
len += elen(in6p->in6p_outputopts->ip6po_dest2);
|
| 4228 |
|
|
return len;
|
| 4229 |
|
|
#undef elen
|
| 4230 |
|
|
}
|
| 4231 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 4232 |
|
|
# undef in6pcb
|
| 4233 |
|
|
# undef in6p_outputopts
|
| 4234 |
|
|
#endif
|
