racoon.tproj/remoteconf.c

   1 /*      $KAME: remoteconf.c,v 1.28 2001/10/02 03:46:41 sakane Exp $     */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/socket.h>
  35 #include <sys/queue.h>
  36
  37 #include <netinet/in.h>
  38 #include <netkey/key_var.h>
  39
  40 #ifdef IPV6_INRIA_VERSION
  41 #include <netinet/ipsec.h>
  42 #else
  43 #include <netinet6/ipsec.h>
  44 #endif
  45
  46 #include <stdlib.h>
  47 #include <stdio.h>
  48 #include <string.h>
  49 #include <errno.h>
  50
  51 #include "var.h"
  52 #include "misc.h"
  53 #include "vmbuf.h"
  54 #include "plog.h"
  55 #include "sockmisc.h"
  56 #include "debug.h"
  57
  58 #include "isakmp_var.h"
  59 #include "isakmp.h"
  60 #include "ipsec_doi.h"
  61 #include "oakley.h"
  62 #include "remoteconf.h"
  63 #include "localconf.h"
  64 #include "grabmyaddr.h"
  65 #include "proposal.h"
  66 #include "vendorid.h"
  67 #include "gcmalloc.h"
  68
  69 static LIST_HEAD(_rmtree, remoteconf) rmtree;
  70
  71 /*%%%*/
  72 /*
  73  * search remote configuration.
  74  * don't use port number to search if its value is either IPSEC_PORT_ANY.
  75  * If matching anonymous entry, then new entry is copied from anonymous entry.
  76  * If no anonymous entry found, then return NULL.
  77  * OUT: NULL:   NG
  78  *      Other:  remote configuration entry.
  79  */
  80 struct remoteconf *
  81 getrmconf(remote)
  82         struct sockaddr *remote;
  83 {
  84         struct remoteconf *p;
  85         struct remoteconf *anon = NULL;
  86         int withport;
  87         char buf[NI_MAXHOST + NI_MAXSERV + 10];
  88         char addr[NI_MAXHOST], port[NI_MAXSERV];
  89
  90         withport = 0;
  91
  92         switch (remote->sa_family) {
  93         case AF_INET:
  94                 if (((struct sockaddr_in *)remote)->sin_port != IPSEC_PORT_ANY)
  95                         withport = 1;
  96                 break;
  97 #ifdef INET6
  98         case AF_INET6:
  99                 if (((struct sockaddr_in6 *)remote)->sin6_port != IPSEC_PORT_ANY)
 100                         withport = 1;
 101                 break;
 102 #endif
 103         default:
 104                 plog(LLV_ERROR, LOCATION, NULL,
 105                         "invalid family: %d\n", remote->sa_family);
 106                 exit(1);
 107         }
 108
 109         GETNAMEINFO(remote, addr, port);
 110         snprintf(buf, sizeof(buf), "%s%s%s%s", addr,
 111                 withport ? "[" : "",
 112                 withport ? port : "",
 113                 withport ? "]" : "");
 114
 115         LIST_FOREACH(p, &rmtree, chain) {
 116                 if ((!withport && cmpsaddrwop(remote, p->remote) == 0)
 117                  || (withport && cmpsaddrstrict(remote, p->remote) == 0)) {
 118                         plog(LLV_DEBUG, LOCATION, NULL,
 119                                 "configuration found for %s.\n", buf);
 120                         return p;
 121                 }
 122
 123                 /* save the pointer to the anonymous configuration */
 124                 if (p->remote->sa_family == AF_UNSPEC)
 125                         anon = p;
 126         }
 127
 128         if (anon != NULL) {
 129                 plog(LLV_DEBUG, LOCATION, NULL,
 130                         "anonymous configuration selected for %s.\n", buf);
 131                 return anon;
 132         }
 133
 134         plog(LLV_DEBUG, LOCATION, NULL,
 135                 "no remote configuration found.\n");
 136         return NULL;
 137 }
 138
 139 struct remoteconf *
 140 newrmconf()
 141 {
 142         struct remoteconf *new;
 143
 144         new = racoon_calloc(1, sizeof(*new));
 145         if (new == NULL)
 146                 return NULL;
 147
 148         new->proposal = NULL;
 149
 150         /* set default */
 151         new->doitype = IPSEC_DOI;
 152         new->sittype = IPSECDOI_SIT_IDENTITY_ONLY;
 153         new->idvtype = IDTYPE_ADDRESS;
 154         new->idvtype_p = IDTYPE_ADDRESS;
 155         new->nonce_size = DEFAULT_NONCE_SIZE;
 156         new->keepalive = FALSE;
 157         new->passive = FALSE;
 158         new->ini_contact = TRUE;
 159         new->pcheck_level = PROP_CHECK_STRICT;
 160         new->verify_identifier = FALSE;
 161         new->verify_cert = TRUE;
 162         new->getcert_method = ISAKMP_GETCERT_PAYLOAD;
 163         new->send_cert = TRUE;
 164         new->send_cr = TRUE;
 165         new->support_mip6 = FALSE;
 166         new->gen_policy = FALSE;
 167         new->retry_counter = lcconf->retry_counter;
 168         new->retry_interval = lcconf->retry_interval;
 169
 170         return new;
 171 }
 172
 173 void
 174 delrmconf(rmconf)
 175         struct remoteconf *rmconf;
 176 {
 177         if (rmconf->etypes)
 178                 deletypes(rmconf->etypes);
 179         if (rmconf->dhgrp)
 180                 oakley_dhgrp_free(rmconf->dhgrp);
 181         if (rmconf->proposal)
 182                 delisakmpsa(rmconf->proposal);
 183         racoon_free(rmconf);
 184 }
 185
 186 void
 187 delisakmpsa(sa)
 188         struct isakmpsa *sa;
 189 {
 190         if (sa->dhgrp)
 191                 oakley_dhgrp_free(sa->dhgrp);
 192         if (sa->next)
 193                 delisakmpsa(sa->next);
 194 #ifdef HAVE_GSSAPI
 195         if (sa->gssid)
 196                 vfree(sa->gssid);
 197 #endif
 198         racoon_free(sa);
 199 }
 200
 201 void
 202 deletypes(e)
 203         struct etypes *e;
 204 {
 205         if (e->next)
 206                 deletypes(e->next);
 207         racoon_free(e);
 208 }
 209
 210 /*
 211  * insert into head of list.
 212  */
 213 void
 214 insrmconf(new)
 215         struct remoteconf *new;
 216 {
 217         LIST_INSERT_HEAD(&rmtree, new, chain);
 218 }
 219
 220 void
 221 remrmconf(rmconf)
 222         struct remoteconf *rmconf;
 223 {
 224         LIST_REMOVE(rmconf, chain);
 225 }
 226
 227 void
 228 flushrmconf()
 229 {
 230         struct remoteconf *p, *next;
 231
 232         for (p = LIST_FIRST(&rmtree); p; p = next) {
 233                 next = LIST_NEXT(p, chain);
 234                 remrmconf(p);
 235                 delrmconf(p);
 236         }
 237 }
 238
 239 void
 240 initrmconf()
 241 {
 242         LIST_INIT(&rmtree);
 243 }
 244
 245 /* check exchange type to be acceptable */
 246 struct etypes *
 247 check_etypeok(rmconf, etype)
 248         struct remoteconf *rmconf;
 249         u_int8_t etype;
 250 {
 251         struct etypes *e;
 252
 253         for (e = rmconf->etypes; e != NULL; e = e->next) {
 254                 if (e->type == etype)
 255                         break;
 256         }
 257
 258         return e;
 259 }
 260
 261 /*%%%*/
 262 struct isakmpsa *
 263 newisakmpsa()
 264 {
 265         struct isakmpsa *new;
 266
 267         new = racoon_calloc(1, sizeof(*new));
 268         if (new == NULL)
 269                 return NULL;
 270
 271         /*
 272          * Just for sanity, make sure this is initialized.  This is
 273          * filled in for real when the ISAKMP proposal is configured.
 274          */
 275         new->vendorid = VENDORID_UNKNOWN;
 276
 277         new->next = NULL;
 278         new->rmconf = NULL;
 279 #ifdef HAVE_GSSAPI
 280         new->gssid = NULL;
 281 #endif
 282
 283         return new;
 284 }
 285
 286 /*
 287  * insert into tail of list.
 288  */
 289 void
 290 insisakmpsa(new, rmconf)
 291         struct isakmpsa *new;
 292         struct remoteconf *rmconf;
 293 {
 294         struct isakmpsa *p;
 295
 296         new->rmconf = rmconf;
 297
 298         if (rmconf->proposal == NULL) {
 299                 rmconf->proposal = new;
 300                 return;
 301         }
 302
 303         for (p = rmconf->proposal; p->next != NULL; p = p->next)
 304                 ;
 305         p->next = new;
 306
 307         return;
 308 }
 309
 310 const char *
 311 rm2str(rmconf)
 312         const struct remoteconf *rmconf;
 313 {
 314         if (rmconf->remote->sa_family == AF_UNSPEC)
 315                 return "anonymous";
 316         return saddr2str(rmconf->remote);
 317 }