[ff36f5e] | 1 | /* $NetBSD: nattraversal.c,v 1.14 2011/03/14 17:18:13 tteras Exp $ */ |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany. |
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| 5 | * Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs |
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| 6 | * All rights reserved. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms, with or without |
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| 9 | * modification, are permitted provided that the following conditions |
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| 10 | * are met: |
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| 11 | * 1. Redistributions of source code must retain the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer. |
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer in the |
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| 15 | * documentation and/or other materials provided with the distribution. |
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| 16 | * 3. Neither the name of the project nor the names of its contributors |
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| 17 | * may be used to endorse or promote products derived from this software |
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| 18 | * without specific prior written permission. |
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| 19 | * |
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 30 | * SUCH DAMAGE. |
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| 31 | */ |
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| 32 | |
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| 33 | #include "config.h" |
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| 34 | |
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| 35 | #include <sys/types.h> |
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| 36 | #include <sys/param.h> |
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| 37 | |
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| 38 | #ifdef __linux__ |
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| 39 | #include <linux/udp.h> |
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| 40 | #endif |
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| 41 | #if defined(__NetBSD__) || defined (__FreeBSD__) |
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| 42 | #include <netinet/udp.h> |
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| 43 | #endif |
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| 44 | |
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| 45 | #include <stdlib.h> |
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| 46 | #include <stdio.h> |
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| 47 | #include <string.h> |
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| 48 | #include <errno.h> |
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| 49 | #include <ctype.h> |
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| 50 | |
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| 51 | #include "var.h" |
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| 52 | #include "misc.h" |
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| 53 | #include "vmbuf.h" |
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| 54 | #include "plog.h" |
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| 55 | #include "debug.h" |
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| 56 | |
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| 57 | #include "localconf.h" |
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| 58 | #include "remoteconf.h" |
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| 59 | #include "sockmisc.h" |
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| 60 | #include "isakmp_var.h" |
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| 61 | #include "isakmp.h" |
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| 62 | #include "oakley.h" |
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| 63 | #include "ipsec_doi.h" |
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| 64 | #include "vendorid.h" |
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| 65 | #include "handler.h" |
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| 66 | #include "crypto_openssl.h" |
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| 67 | #include "schedule.h" |
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| 68 | #include "nattraversal.h" |
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| 69 | #include "grabmyaddr.h" |
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| 70 | |
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| 71 | struct natt_ka_addrs { |
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| 72 | struct sockaddr *src; |
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| 73 | struct sockaddr *dst; |
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| 74 | unsigned in_use; |
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| 75 | |
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| 76 | TAILQ_ENTRY(natt_ka_addrs) chain; |
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| 77 | }; |
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| 78 | |
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| 79 | static TAILQ_HEAD(_natt_ka_addrs, natt_ka_addrs) ka_tree; |
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| 80 | static struct sched sc_natt = SCHED_INITIALIZER(); |
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| 81 | |
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| 82 | /* |
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| 83 | * check if the given vid is NAT-T. |
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| 84 | */ |
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| 85 | int |
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| 86 | natt_vendorid (int vid) |
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| 87 | { |
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| 88 | return ( |
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| 89 | #ifdef ENABLE_NATT_00 |
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| 90 | vid == VENDORID_NATT_00 || |
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| 91 | #endif |
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| 92 | #ifdef ENABLE_NATT_01 |
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| 93 | vid == VENDORID_NATT_01 || |
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| 94 | #endif |
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| 95 | #ifdef ENABLE_NATT_02 |
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| 96 | vid == VENDORID_NATT_02 || |
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| 97 | vid == VENDORID_NATT_02_N || |
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| 98 | #endif |
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| 99 | #ifdef ENABLE_NATT_03 |
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| 100 | vid == VENDORID_NATT_03 || |
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| 101 | #endif |
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| 102 | #ifdef ENABLE_NATT_04 |
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| 103 | vid == VENDORID_NATT_04 || |
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| 104 | #endif |
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| 105 | #ifdef ENABLE_NATT_05 |
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| 106 | vid == VENDORID_NATT_05 || |
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| 107 | #endif |
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| 108 | #ifdef ENABLE_NATT_06 |
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| 109 | vid == VENDORID_NATT_06 || |
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| 110 | #endif |
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| 111 | #ifdef ENABLE_NATT_07 |
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| 112 | vid == VENDORID_NATT_07 || |
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| 113 | #endif |
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| 114 | #ifdef ENABLE_NATT_08 |
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| 115 | vid == VENDORID_NATT_08 || |
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| 116 | #endif |
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| 117 | /* Always enable NATT RFC if ENABLE_NATT |
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| 118 | */ |
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| 119 | vid == VENDORID_NATT_RFC); |
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| 120 | } |
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| 121 | |
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| 122 | vchar_t * |
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| 123 | natt_hash_addr (struct ph1handle *iph1, struct sockaddr *addr) |
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| 124 | { |
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| 125 | vchar_t *natd; |
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| 126 | vchar_t *buf; |
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| 127 | char *ptr; |
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| 128 | void *addr_ptr, *addr_port; |
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| 129 | size_t buf_size, addr_size; |
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| 130 | int natt_force = 0; |
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| 131 | |
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| 132 | if (iph1->rmconf != NULL && iph1->rmconf->nat_traversal == NATT_FORCE) |
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| 133 | natt_force = 1; |
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| 134 | |
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| 135 | plog (LLV_INFO, LOCATION, addr, "Hashing %s with algo #%d %s\n", |
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| 136 | saddr2str(addr), iph1->approval->hashtype, |
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| 137 | natt_force?"(NAT-T forced)":""); |
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| 138 | |
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| 139 | if (addr->sa_family == AF_INET) { |
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| 140 | addr_size = sizeof (struct in_addr); /* IPv4 address */ |
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| 141 | addr_ptr = &((struct sockaddr_in *)addr)->sin_addr; |
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| 142 | addr_port = &((struct sockaddr_in *)addr)->sin_port; |
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| 143 | } |
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| 144 | else if (addr->sa_family == AF_INET6) { |
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| 145 | addr_size = sizeof (struct in6_addr); /* IPv6 address */ |
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| 146 | addr_ptr = &((struct sockaddr_in6 *)addr)->sin6_addr; |
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| 147 | addr_port = &((struct sockaddr_in6 *)addr)->sin6_port; |
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| 148 | } |
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| 149 | else { |
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| 150 | plog (LLV_ERROR, LOCATION, addr, "Unsupported address family #0x%x\n", addr->sa_family); |
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| 151 | return NULL; |
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| 152 | } |
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| 153 | |
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| 154 | buf_size = 2 * sizeof (cookie_t); /* CKY-I + CKY+R */ |
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| 155 | buf_size += addr_size + 2; /* Address + Port */ |
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| 156 | |
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| 157 | if ((buf = vmalloc (buf_size)) == NULL) |
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| 158 | return NULL; |
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| 159 | |
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| 160 | ptr = buf->v; |
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| 161 | |
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| 162 | /* Copy-in CKY-I */ |
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| 163 | memcpy (ptr, iph1->index.i_ck, sizeof (cookie_t)); |
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| 164 | ptr += sizeof (cookie_t); |
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| 165 | |
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| 166 | /* Copy-in CKY-I */ |
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| 167 | memcpy (ptr, iph1->index.r_ck, sizeof (cookie_t)); |
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| 168 | ptr += sizeof (cookie_t); |
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| 169 | |
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| 170 | /* Copy-in Address (or zeroes if NATT_FORCE) */ |
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| 171 | if (natt_force) |
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| 172 | memset (ptr, 0, addr_size); |
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| 173 | else |
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| 174 | memcpy (ptr, addr_ptr, addr_size); |
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| 175 | ptr += addr_size; |
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| 176 | |
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| 177 | /* Copy-in Port number */ |
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| 178 | memcpy (ptr, addr_port, 2); |
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| 179 | |
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| 180 | natd = oakley_hash (buf, iph1); |
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| 181 | vfree(buf); |
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| 182 | |
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| 183 | return natd; |
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| 184 | } |
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| 185 | |
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| 186 | int |
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| 187 | natt_compare_addr_hash (struct ph1handle *iph1, vchar_t *natd_received, |
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| 188 | int natd_seq) |
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| 189 | { |
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| 190 | vchar_t *natd_computed; |
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| 191 | u_int32_t flag; |
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| 192 | int verified = 0; |
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| 193 | |
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| 194 | if (iph1->rmconf != NULL && |
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| 195 | iph1->rmconf->nat_traversal == NATT_FORCE) |
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| 196 | return verified; |
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| 197 | |
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| 198 | if (natd_seq == 0) { |
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| 199 | natd_computed = natt_hash_addr (iph1, iph1->local); |
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| 200 | flag = NAT_DETECTED_ME; |
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| 201 | } |
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| 202 | else { |
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| 203 | natd_computed = natt_hash_addr (iph1, iph1->remote); |
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| 204 | flag = NAT_DETECTED_PEER; |
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| 205 | } |
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| 206 | |
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| 207 | if (natd_computed == NULL) { |
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| 208 | plog(LLV_ERROR, LOCATION, NULL, "natd_computed allocation failed\n"); |
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| 209 | return verified; /* XXX should abort */ |
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| 210 | } |
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| 211 | |
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| 212 | if (natd_received->l == natd_computed->l && |
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| 213 | memcmp (natd_received->v, natd_computed->v, natd_received->l) == 0) { |
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| 214 | iph1->natt_flags &= ~flag; |
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| 215 | verified = 1; |
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| 216 | } |
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| 217 | |
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| 218 | vfree (natd_computed); |
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| 219 | |
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| 220 | return verified; |
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| 221 | } |
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| 222 | |
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| 223 | int |
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| 224 | natt_udp_encap (int encmode) |
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| 225 | { |
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| 226 | return (encmode == IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_RFC || |
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| 227 | encmode == IPSECDOI_ATTR_ENC_MODE_UDPTRNS_RFC || |
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| 228 | encmode == IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_DRAFT || |
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| 229 | encmode == IPSECDOI_ATTR_ENC_MODE_UDPTRNS_DRAFT); |
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| 230 | } |
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| 231 | |
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| 232 | int |
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| 233 | natt_fill_options (struct ph1natt_options *opts, int version) |
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| 234 | { |
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| 235 | if (! opts) |
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| 236 | return -1; |
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| 237 | |
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| 238 | opts->version = version; |
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| 239 | |
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| 240 | switch (version) { |
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| 241 | case VENDORID_NATT_00: |
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| 242 | case VENDORID_NATT_01: |
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| 243 | opts->float_port = 0; /* No port floating for those drafts */ |
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| 244 | opts->payload_nat_d = ISAKMP_NPTYPE_NATD_DRAFT; |
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| 245 | opts->payload_nat_oa = ISAKMP_NPTYPE_NATOA_DRAFT; |
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| 246 | opts->mode_udp_tunnel = IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_DRAFT; |
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| 247 | opts->mode_udp_transport = IPSECDOI_ATTR_ENC_MODE_UDPTRNS_DRAFT; |
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| 248 | opts->encaps_type = UDP_ENCAP_ESPINUDP_NON_IKE; |
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| 249 | break; |
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| 250 | |
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| 251 | case VENDORID_NATT_02: |
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| 252 | case VENDORID_NATT_02_N: |
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| 253 | case VENDORID_NATT_03: |
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| 254 | opts->float_port = lcconf->port_isakmp_natt; |
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| 255 | opts->payload_nat_d = ISAKMP_NPTYPE_NATD_DRAFT; |
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| 256 | opts->payload_nat_oa = ISAKMP_NPTYPE_NATOA_DRAFT; |
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| 257 | opts->mode_udp_tunnel = IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_DRAFT; |
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| 258 | opts->mode_udp_transport = IPSECDOI_ATTR_ENC_MODE_UDPTRNS_DRAFT; |
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| 259 | opts->encaps_type = UDP_ENCAP_ESPINUDP; |
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| 260 | break; |
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| 261 | case VENDORID_NATT_04: |
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| 262 | case VENDORID_NATT_05: |
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| 263 | case VENDORID_NATT_06: |
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| 264 | case VENDORID_NATT_07: |
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| 265 | case VENDORID_NATT_08: |
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| 266 | opts->float_port = lcconf->port_isakmp_natt; |
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| 267 | opts->payload_nat_d = ISAKMP_NPTYPE_NATD_BADDRAFT; |
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| 268 | opts->payload_nat_oa = ISAKMP_NPTYPE_NATOA_BADDRAFT; |
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| 269 | opts->mode_udp_tunnel = IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_RFC; |
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| 270 | opts->mode_udp_transport = IPSECDOI_ATTR_ENC_MODE_UDPTRNS_RFC; |
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| 271 | opts->encaps_type = UDP_ENCAP_ESPINUDP; |
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| 272 | break; |
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| 273 | case VENDORID_NATT_RFC: |
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| 274 | opts->float_port = lcconf->port_isakmp_natt; |
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| 275 | opts->payload_nat_d = ISAKMP_NPTYPE_NATD_RFC; |
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| 276 | opts->payload_nat_oa = ISAKMP_NPTYPE_NATOA_RFC; |
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| 277 | opts->mode_udp_tunnel = IPSECDOI_ATTR_ENC_MODE_UDPTUNNEL_RFC; |
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| 278 | opts->mode_udp_transport = IPSECDOI_ATTR_ENC_MODE_UDPTRNS_RFC; |
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| 279 | opts->encaps_type = UDP_ENCAP_ESPINUDP; |
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| 280 | break; |
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| 281 | default: |
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| 282 | plog(LLV_ERROR, LOCATION, NULL, |
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| 283 | "unsupported NAT-T version: %s\n", |
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| 284 | vid_string_by_id(version)); |
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| 285 | return -1; |
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| 286 | } |
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| 287 | |
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| 288 | opts->mode_udp_diff = opts->mode_udp_tunnel - IPSECDOI_ATTR_ENC_MODE_TUNNEL; |
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| 289 | |
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| 290 | return 0; |
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| 291 | } |
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| 292 | |
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| 293 | void |
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| 294 | natt_float_ports (struct ph1handle *iph1) |
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| 295 | { |
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| 296 | if (! (iph1->natt_flags & NAT_DETECTED) ) |
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| 297 | return; |
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| 298 | if (! iph1->natt_options->float_port){ |
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| 299 | /* Drafts 00 / 01, just schedule keepalive */ |
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| 300 | natt_keepalive_add_ph1 (iph1); |
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| 301 | return; |
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| 302 | } |
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| 303 | |
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| 304 | set_port (iph1->local, iph1->natt_options->float_port); |
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| 305 | set_port (iph1->remote, iph1->natt_options->float_port); |
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| 306 | iph1->natt_flags |= NAT_PORTS_CHANGED | NAT_ADD_NON_ESP_MARKER; |
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| 307 | |
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| 308 | natt_keepalive_add_ph1 (iph1); |
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| 309 | } |
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| 310 | |
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| 311 | static int |
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| 312 | natt_is_enabled (struct remoteconf *rmconf, void *args) |
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| 313 | { |
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| 314 | if (rmconf->nat_traversal) |
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| 315 | return 1; |
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| 316 | return 0; |
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| 317 | } |
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| 318 | |
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| 319 | void |
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| 320 | natt_handle_vendorid (struct ph1handle *iph1, int vid_numeric) |
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| 321 | { |
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| 322 | if (iph1->rmconf == NULL) { |
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| 323 | /* Check if any candidate remote conf allows nat-t */ |
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| 324 | struct rmconfselector rmconf; |
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| 325 | rmconf_selector_from_ph1(&rmconf, iph1); |
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| 326 | if (enumrmconf(&rmconf, natt_is_enabled, NULL) == 0) |
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| 327 | return; |
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| 328 | } else { |
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| 329 | if (!iph1->rmconf->nat_traversal) |
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| 330 | return; |
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| 331 | } |
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| 332 | |
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| 333 | if (! iph1->natt_options) |
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| 334 | iph1->natt_options = racoon_calloc (1, sizeof (*iph1->natt_options)); |
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| 335 | |
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| 336 | if (! iph1->natt_options) { |
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| 337 | plog (LLV_ERROR, LOCATION, NULL, |
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| 338 | "Allocating memory for natt_options failed!\n"); |
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| 339 | return; |
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| 340 | } |
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| 341 | |
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| 342 | if (iph1->natt_options->version < vid_numeric) |
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| 343 | if (natt_fill_options (iph1->natt_options, vid_numeric) == 0) |
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| 344 | iph1->natt_flags |= NAT_ANNOUNCED; |
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| 345 | } |
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| 346 | |
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| 347 | static void |
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| 348 | natt_keepalive_delete (struct natt_ka_addrs *ka) |
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| 349 | { |
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| 350 | TAILQ_REMOVE (&ka_tree, ka, chain); |
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| 351 | racoon_free (ka->src); |
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| 352 | racoon_free (ka->dst); |
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| 353 | racoon_free (ka); |
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| 354 | } |
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| 355 | |
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| 356 | /* NAT keepalive functions */ |
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| 357 | static void |
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| 358 | natt_keepalive_send (struct sched *param) |
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| 359 | { |
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| 360 | struct natt_ka_addrs *ka, *next = NULL; |
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| 361 | char keepalive_packet[] = { 0xff }; |
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| 362 | size_t len; |
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| 363 | int s; |
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| 364 | |
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| 365 | for (ka = TAILQ_FIRST(&ka_tree); ka; ka = next) { |
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| 366 | next = TAILQ_NEXT(ka, chain); |
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| 367 | |
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| 368 | s = myaddr_getfd(ka->src); |
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| 369 | if (s == -1) { |
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| 370 | natt_keepalive_delete(ka); |
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| 371 | continue; |
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| 372 | } |
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| 373 | plog (LLV_DEBUG, LOCATION, NULL, "KA: %s\n", |
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| 374 | saddr2str_fromto("%s->%s", ka->src, ka->dst)); |
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| 375 | len = sendfromto(s, keepalive_packet, sizeof (keepalive_packet), |
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| 376 | ka->src, ka->dst, 1); |
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| 377 | if (len == -1) |
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| 378 | plog(LLV_ERROR, LOCATION, NULL, "KA: sendfromto failed: %s\n", |
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| 379 | strerror (errno)); |
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| 380 | } |
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| 381 | |
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| 382 | sched_schedule (&sc_natt, lcconf->natt_ka_interval, natt_keepalive_send); |
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| 383 | } |
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| 384 | |
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| 385 | void |
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| 386 | natt_keepalive_init (void) |
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| 387 | { |
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| 388 | TAILQ_INIT(&ka_tree); |
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| 389 | |
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| 390 | /* To disable sending KAs set natt_ka_interval=0 */ |
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| 391 | if (lcconf->natt_ka_interval > 0) |
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| 392 | sched_schedule (&sc_natt, lcconf->natt_ka_interval, natt_keepalive_send); |
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| 393 | } |
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| 394 | |
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| 395 | int |
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| 396 | natt_keepalive_add (struct sockaddr *src, struct sockaddr *dst) |
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| 397 | { |
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| 398 | struct natt_ka_addrs *ka = NULL, *new_addr; |
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| 399 | |
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| 400 | TAILQ_FOREACH (ka, &ka_tree, chain) { |
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| 401 | if (cmpsaddr(ka->src, src) == CMPSADDR_MATCH && |
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| 402 | cmpsaddr(ka->dst, dst) == CMPSADDR_MATCH) { |
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| 403 | ka->in_use++; |
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| 404 | plog (LLV_INFO, LOCATION, NULL, "KA found: %s (in_use=%u)\n", |
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| 405 | saddr2str_fromto("%s->%s", src, dst), ka->in_use); |
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| 406 | return 0; |
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| 407 | } |
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| 408 | } |
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| 409 | |
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| 410 | plog (LLV_INFO, LOCATION, NULL, "KA list add: %s\n", saddr2str_fromto("%s->%s", src, dst)); |
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| 411 | |
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| 412 | new_addr = (struct natt_ka_addrs *)racoon_malloc(sizeof(*new_addr)); |
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| 413 | if (! new_addr) { |
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| 414 | plog (LLV_ERROR, LOCATION, NULL, "Can't allocate new KA list item\n"); |
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| 415 | return -1; |
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| 416 | } |
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| 417 | |
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| 418 | if ((new_addr->src = dupsaddr(src)) == NULL) { |
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| 419 | racoon_free(new_addr); |
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| 420 | plog (LLV_ERROR, LOCATION, NULL, "Can't allocate new KA list item\n"); |
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| 421 | return -1; |
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| 422 | } |
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| 423 | if ((new_addr->dst = dupsaddr(dst)) == NULL) { |
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| 424 | racoon_free(new_addr); |
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| 425 | plog (LLV_ERROR, LOCATION, NULL, "Can't allocate new KA list item\n"); |
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| 426 | return -1; |
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| 427 | } |
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| 428 | new_addr->in_use = 1; |
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| 429 | TAILQ_INSERT_TAIL(&ka_tree, new_addr, chain); |
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| 430 | |
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| 431 | return 0; |
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| 432 | } |
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| 433 | |
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| 434 | int |
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| 435 | natt_keepalive_add_ph1 (struct ph1handle *iph1) |
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| 436 | { |
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| 437 | int ret = 0; |
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| 438 | |
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| 439 | /* Should only the NATed host send keepalives? |
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| 440 | If yes, add '(iph1->natt_flags & NAT_DETECTED_ME)' |
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| 441 | to the following condition. */ |
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| 442 | if (iph1->natt_flags & NAT_DETECTED && |
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| 443 | ! (iph1->natt_flags & NAT_KA_QUEUED)) { |
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| 444 | ret = natt_keepalive_add (iph1->local, iph1->remote); |
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| 445 | if (ret == 0) |
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| 446 | iph1->natt_flags |= NAT_KA_QUEUED; |
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| 447 | } |
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| 448 | |
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| 449 | return ret; |
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| 450 | } |
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| 451 | |
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| 452 | void |
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| 453 | natt_keepalive_remove (struct sockaddr *src, struct sockaddr *dst) |
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| 454 | { |
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| 455 | struct natt_ka_addrs *ka, *next = NULL; |
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| 456 | |
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| 457 | plog (LLV_INFO, LOCATION, NULL, "KA remove: %s\n", saddr2str_fromto("%s->%s", src, dst)); |
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| 458 | |
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| 459 | for (ka = TAILQ_FIRST(&ka_tree); ka; ka = next) { |
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| 460 | next = TAILQ_NEXT(ka, chain); |
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| 461 | |
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| 462 | plog (LLV_DEBUG, LOCATION, NULL, "KA tree dump: %s (in_use=%u)\n", |
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| 463 | saddr2str_fromto("%s->%s", src, dst), ka->in_use); |
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| 464 | |
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| 465 | if (cmpsaddr(ka->src, src) == CMPSADDR_MATCH && |
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| 466 | cmpsaddr(ka->dst, dst) == CMPSADDR_MATCH && |
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| 467 | -- ka->in_use <= 0) { |
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| 468 | |
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| 469 | plog (LLV_DEBUG, LOCATION, NULL, "KA removing this one...\n"); |
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| 470 | |
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| 471 | natt_keepalive_delete (ka); |
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| 472 | /* Should we break here? Every pair of addresses should |
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| 473 | be inserted only once, but who knows :-) Lets traverse |
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| 474 | the whole list... */ |
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| 475 | } |
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| 476 | } |
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| 477 | } |
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| 478 | |
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| 479 | static int |
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| 480 | natt_enabled_in_rmconf_stub (struct remoteconf *rmconf, void *data) |
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| 481 | { |
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| 482 | return rmconf->nat_traversal ? 1 : 0; |
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| 483 | } |
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| 484 | |
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| 485 | int |
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| 486 | natt_enabled_in_rmconf () |
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| 487 | { |
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| 488 | return enumrmconf(NULL, natt_enabled_in_rmconf_stub, NULL) != 0; |
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| 489 | } |
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| 490 | |
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| 491 | |
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| 492 | struct payload_list * |
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| 493 | isakmp_plist_append_natt_vids (struct payload_list *plist, vchar_t *vid_natt[MAX_NATT_VID_COUNT]){ |
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| 494 | int i, vid_natt_i = 0; |
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| 495 | |
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| 496 | if(vid_natt == NULL) |
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| 497 | return NULL; |
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| 498 | |
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| 499 | for (i = 0; i < MAX_NATT_VID_COUNT; i++) |
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| 500 | vid_natt[i]=NULL; |
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| 501 | |
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| 502 | /* Puts the olders VIDs last, as some implementations may choose the first |
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| 503 | * NATT VID given |
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| 504 | */ |
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| 505 | |
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| 506 | /* Always set RFC VID |
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| 507 | */ |
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| 508 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_RFC)) != NULL) |
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| 509 | vid_natt_i++; |
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| 510 | #ifdef ENABLE_NATT_08 |
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| 511 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_08)) != NULL) |
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| 512 | vid_natt_i++; |
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| 513 | #endif |
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| 514 | #ifdef ENABLE_NATT_07 |
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| 515 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_07)) != NULL) |
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| 516 | vid_natt_i++; |
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| 517 | #endif |
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| 518 | #ifdef ENABLE_NATT_06 |
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| 519 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_06)) != NULL) |
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| 520 | vid_natt_i++; |
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| 521 | #endif |
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| 522 | #ifdef ENABLE_NATT_05 |
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| 523 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_05)) != NULL) |
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| 524 | vid_natt_i++; |
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| 525 | #endif |
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| 526 | #ifdef ENABLE_NATT_04 |
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| 527 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_04)) != NULL) |
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| 528 | vid_natt_i++; |
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| 529 | #endif |
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| 530 | #ifdef ENABLE_NATT_03 |
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| 531 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_03)) != NULL) |
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| 532 | vid_natt_i++; |
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| 533 | #endif |
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| 534 | #ifdef ENABLE_NATT_02 |
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| 535 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02)) != NULL) |
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| 536 | vid_natt_i++; |
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| 537 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02_N)) != NULL) |
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| 538 | vid_natt_i++; |
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| 539 | #endif |
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| 540 | #ifdef ENABLE_NATT_01 |
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| 541 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_01)) != NULL) |
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| 542 | vid_natt_i++; |
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| 543 | #endif |
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| 544 | #ifdef ENABLE_NATT_00 |
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| 545 | if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_00)) != NULL) |
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| 546 | vid_natt_i++; |
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| 547 | #endif |
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| 548 | /* set VID payload for NAT-T */ |
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| 549 | for (i = 0; i < vid_natt_i; i++) |
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| 550 | plist = isakmp_plist_append(plist, vid_natt[i], ISAKMP_NPTYPE_VID); |
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| 551 | |
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| 552 | return plist; |
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| 553 | } |
---|