crypto/dist/ipsec-tools/src/racoon/evt.c

   1 /*      $NetBSD: evt.c,v 1.8 2008/12/23 14:03:12 tteras Exp $   */
   2
   3 /* Id: evt.c,v 1.5 2006/06/22 20:11:35 manubsd Exp */
   4
   5 /*
   6  * Copyright (C) 2004 Emmanuel Dreyfus
   7  * Copyright (C) 2008 Timo Teras
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the project nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "config.h"
  36
  37 #include <errno.h>
  38 #include <string.h>
  39 #include <stdio.h>
  40 #include <time.h>
  41 #include <unistd.h>
  42 #include <stdlib.h>
  43 #include <sys/queue.h>
  44 #include <sys/socket.h>
  45
  46 #include "vmbuf.h"
  47 #include "plog.h"
  48 #include "misc.h"
  49 #include "admin.h"
  50 #include "handler.h"
  51 #include "session.h"
  52 #include "gcmalloc.h"
  53 #include "evt.h"
  54 #include "var.h"
  55
  56 #ifdef ENABLE_ADMINPORT
  57
  58 static EVT_LISTENER_LIST(evt_listeners);
  59
  60 struct evt_message {
  61         struct admin_com adm;
  62         struct evt_async evt;
  63 };
  64
  65 struct evt {
  66         struct evtdump *dump;
  67         TAILQ_ENTRY(evt) next;
  68 };
  69
  70 TAILQ_HEAD(evtlist, evt);
  71
  72 #define EVTLIST_MAX     32
  73
  74 static struct evtlist evtlist = TAILQ_HEAD_INITIALIZER(evtlist);
  75 static int evtlist_len = 0;
  76 static int evtlist_inuse = 0;
  77
  78 static struct {
  79         int newtype, oldtype;
  80 } evttype_map[] = {
  81         { EVT_RACOON_QUIT,              EVTT_RACOON_QUIT },
  82         { EVT_PHASE1_UP,                EVTT_PHASE1_UP },
  83         { EVT_PHASE1_DOWN,              EVTT_PHASE1_DOWN },
  84         { EVT_PHASE1_NO_RESPONSE,       EVTT_PEER_NO_RESPONSE },
  85         { EVT_PHASE1_NO_PROPOSAL,       EVTT_PEERPH1_NOPROP },
  86         { EVT_PHASE1_AUTH_FAILED,       EVTT_PEERPH1AUTH_FAILED },
  87         { EVT_PHASE1_DPD_TIMEOUT,       EVTT_DPD_TIMEOUT },
  88         { EVT_PHASE1_PEER_DELETED,      EVTT_PEER_DELETE },
  89         { EVT_PHASE1_MODE_CFG,          EVTT_ISAKMP_CFG_DONE },
  90         { EVT_PHASE1_XAUTH_SUCCESS,     EVTT_XAUTH_SUCCESS },
  91         { EVT_PHASE1_XAUTH_FAILED,      EVTT_XAUTH_FAILED },
  92         { EVT_PHASE2_NO_PHASE1,         -1 },
  93         { EVT_PHASE2_UP,                EVTT_PHASE2_UP },
  94         { EVT_PHASE2_DOWN,              EVTT_PHASE2_DOWN },
  95         { EVT_PHASE2_NO_RESPONSE,       EVTT_PEER_NO_RESPONSE },
  96 };
  97
  98 static void
  99 evt_push(src, dst, type, optdata)
 100         struct sockaddr *src;
 101         struct sockaddr *dst;
 102         int type;
 103         vchar_t *optdata;
 104 {
 105         struct evtdump *evtdump;
 106         struct evt *evt;
 107         size_t len;
 108         int i;
 109
 110         /* If admin socket is disabled, silently discard anything */
 111         if (adminsock_path == NULL || !evtlist_inuse)
 112                 return;
 113
 114         /* Map the event type to old */
 115         for (i = 0; i < sizeof(evttype_map) / sizeof(evttype_map[0]); i++)
 116                 if (evttype_map[i].newtype == type)
 117                         break;
 118         if (i >= sizeof(evttype_map) / sizeof(evttype_map[0]))
 119                 return;
 120
 121         type = evttype_map[i].oldtype;
 122         if (type < 0)
 123                 return;
 124
 125         /* If we are above the limit, don't record anything */
 126         if (evtlist_len > EVTLIST_MAX) {
 127                 plog(LLV_DEBUG, LOCATION, NULL,
 128                     "Cannot record event: event queue overflowed\n");
 129                 return;
 130         }
 131
 132         /* If we hit the limit, record an overflow event instead */
 133         if (evtlist_len == EVTLIST_MAX) {
 134                 plog(LLV_ERROR, LOCATION, NULL,
 135                     "Cannot record event: event queue overflow\n");
 136                 src = NULL;
 137                 dst = NULL;
 138                 type = EVTT_OVERFLOW;
 139                 optdata = NULL;
 140         }
 141
 142         len = sizeof(*evtdump);
 143         if (optdata)
 144                 len += optdata->l;
 145
 146         if ((evtdump = racoon_malloc(len)) == NULL) {
 147                 plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
 148                     strerror(errno));
 149                 return;
 150         }
 151
 152         if ((evt = racoon_malloc(sizeof(*evt))) == NULL) {
 153                 plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
 154                     strerror(errno));
 155                 racoon_free(evtdump);
 156                 return;
 157         }
 158
 159         if (src)
 160                 memcpy(&evtdump->src, src, sysdep_sa_len(src));
 161         if (dst)
 162                 memcpy(&evtdump->dst, dst, sysdep_sa_len(dst));
 163         evtdump->len = len;
 164         evtdump->type = type;
 165         time(&evtdump->timestamp);
 166
 167         if (optdata)
 168                 memcpy(evtdump + 1, optdata->v, optdata->l);
 169
 170         evt->dump = evtdump;
 171         TAILQ_INSERT_TAIL(&evtlist, evt, next);
 172
 173         evtlist_len++;
 174
 175         return;
 176 }
 177
 178 static struct evtdump *
 179 evt_pop(void) {
 180         struct evtdump *evtdump;
 181         struct evt *evt;
 182
 183         if ((evt = TAILQ_FIRST(&evtlist)) == NULL)
 184                 return NULL;
 185
 186         evtdump = evt->dump;
 187         TAILQ_REMOVE(&evtlist, evt, next);
 188         racoon_free(evt);
 189         evtlist_len--;
 190
 191         return evtdump;
 192 }
 193
 194 vchar_t *
 195 evt_dump(void) {
 196         struct evtdump *evtdump;
 197         vchar_t *buf = NULL;
 198
 199         if (!evtlist_inuse) {
 200                 evtlist_inuse = 1;
 201                 plog(LLV_ERROR, LOCATION, NULL,
 202                      "evt_dump: deprecated event polling used\n");
 203         }
 204
 205         if ((evtdump = evt_pop()) != NULL) {
 206                 if ((buf = vmalloc(evtdump->len)) == NULL) {
 207                         plog(LLV_ERROR, LOCATION, NULL,
 208                             "evt_dump failed: %s\n", strerror(errno));
 209                         return NULL;
 210                 }
 211                 memcpy(buf->v, evtdump, evtdump->len);
 212                 racoon_free(evtdump);
 213         }
 214
 215         return buf;
 216 }
 217
 218 static struct evt_message *
 219 evtmsg_create(type, optdata)
 220         int type;
 221         vchar_t *optdata;
 222 {
 223         struct evt_message *e;
 224         size_t len;
 225
 226         len = sizeof(struct evt_message);
 227         if (optdata != NULL)
 228                 len += optdata->l;
 229
 230         if ((e = racoon_malloc(len)) == NULL) {
 231                 plog(LLV_ERROR, LOCATION, NULL, "Cannot allocate event: %s\n",
 232                      strerror(errno));
 233                 return NULL;
 234         }
 235
 236         memset(e, 0, sizeof(struct evt_message));
 237         e->adm.ac_len = len;
 238         e->adm.ac_cmd = ADMIN_SHOW_EVT;
 239         e->adm.ac_errno = 0;
 240         e->adm.ac_proto = 0;
 241         e->evt.ec_type = type;
 242         time(&e->evt.ec_timestamp);
 243         if (optdata != NULL)
 244                 memcpy(e + 1, optdata->v, optdata->l);
 245
 246         return e;
 247 }
 248
 249 static void
 250 evt_unsubscribe(l)
 251         struct evt_listener *l;
 252 {
 253         plog(LLV_DEBUG, LOCATION, NULL,
 254              "[%d] admin connection released\n", l->fd);
 255
 256         LIST_REMOVE(l, ll_chain);
 257         unmonitor_fd(l->fd);
 258         close(l->fd);
 259         racoon_free(l);
 260 }
 261
 262 static int
 263 evt_unsubscribe_cb(ctx, fd)
 264         void *ctx;
 265         int fd;
 266 {
 267         evt_unsubscribe((struct evt_listener *) ctx);
 268         return 0;
 269 }
 270
 271 static void
 272 evtmsg_broadcast(ll, e)
 273         const struct evt_listener_list *ll;
 274         struct evt_message *e;
 275 {
 276         struct evt_listener *l, *nl;
 277
 278         for (l = LIST_FIRST(ll); l != NULL; l = nl) {
 279                 nl = LIST_NEXT(l, ll_chain);
 280
 281                 if (send(l->fd, e, e->adm.ac_len, MSG_DONTWAIT) < 0) {
 282                         plog(LLV_DEBUG, LOCATION, NULL, "Cannot send event to fd: %s\n",
 283                                 strerror(errno));
 284                         evt_unsubscribe(l);
 285                 }
 286         }
 287 }
 288
 289 void
 290 evt_generic(type, optdata)
 291         int type;
 292         vchar_t *optdata;
 293 {
 294         struct evt_message *e;
 295
 296         if ((e = evtmsg_create(type, optdata)) == NULL)
 297                 return;
 298
 299         evtmsg_broadcast(&evt_listeners, e);
 300         evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
 301
 302         racoon_free(e);
 303 }
 304
 305 void
 306 evt_phase1(ph1, type, optdata)
 307         const struct ph1handle *ph1;
 308         int type;
 309         vchar_t *optdata;
 310 {
 311         struct evt_message *e;
 312
 313         if ((e = evtmsg_create(type, optdata)) == NULL)
 314                 return;
 315
 316         if (ph1->local)
 317                 memcpy(&e->evt.ec_ph1src, ph1->local, sysdep_sa_len(ph1->local));
 318         if (ph1->remote)
 319                 memcpy(&e->evt.ec_ph1dst, ph1->remote, sysdep_sa_len(ph1->remote));
 320
 321         evtmsg_broadcast(&ph1->evt_listeners, e);
 322         evtmsg_broadcast(&evt_listeners, e);
 323         evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
 324
 325         racoon_free(e);
 326 }
 327
 328 void
 329 evt_phase2(ph2, type, optdata)
 330         const struct ph2handle *ph2;
 331         int type;
 332         vchar_t *optdata;
 333 {
 334         struct evt_message *e;
 335         struct ph1handle *ph1 = ph2->ph1;
 336
 337         if ((e = evtmsg_create(type, optdata)) == NULL)
 338                 return;
 339
 340         if (ph1) {
 341                 if (ph1->local)
 342                         memcpy(&e->evt.ec_ph1src, ph1->local, sysdep_sa_len(ph1->local));
 343                 if (ph1->remote)
 344                         memcpy(&e->evt.ec_ph1dst, ph1->remote, sysdep_sa_len(ph1->remote));
 345         }
 346         e->evt.ec_ph2msgid = ph2->msgid;
 347
 348         evtmsg_broadcast(&ph2->evt_listeners, e);
 349         if (ph1)
 350                 evtmsg_broadcast(&ph1->evt_listeners, e);
 351         evtmsg_broadcast(&evt_listeners, e);
 352         evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
 353
 354         racoon_free(e);
 355 }
 356
 357 int
 358 evt_subscribe(list, fd)
 359         struct evt_listener_list *list;
 360         int fd;
 361 {
 362         struct evt_listener *l;
 363
 364         if ((l = racoon_malloc(sizeof(*l))) == NULL) {
 365                 plog(LLV_ERROR, LOCATION, NULL,
 366                      "Cannot allocate event listener: %s\n",
 367                      strerror(errno));
 368                 return errno;
 369         }
 370
 371         if (list == NULL)
 372                 list = &evt_listeners;
 373
 374         LIST_INSERT_HEAD(list, l, ll_chain);
 375         l->fd = fd;
 376         monitor_fd(l->fd, evt_unsubscribe_cb, l);
 377
 378         plog(LLV_DEBUG, LOCATION, NULL,
 379              "[%d] admin connection is polling events\n", fd);
 380
 381         return -2;
 382 }
 383
 384 void
 385 evt_list_init(list)
 386         struct evt_listener_list *list;
 387 {
 388         LIST_INIT(list);
 389 }
 390
 391 void
 392 evt_list_cleanup(list)
 393         struct evt_listener_list *list;
 394 {
 395         while (!LIST_EMPTY(list))
 396                 evt_unsubscribe(LIST_FIRST(list));
 397 }
 398
 399 #endif /* ENABLE_ADMINPORT */