1 /* $NetBSD: evt.c,v 1.10 2010/10/21 06:15:28 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
evt_push(src,dst,type,optdata)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 *
evt_pop(void)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 *
evt_dump(void)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 *
evtmsg_create(type,optdata)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
evt_unsubscribe(l)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
evt_unsubscribe_cb(ctx,fd)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
evtmsg_broadcast(ll,e)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
evt_generic(type,optdata)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
evt_phase1(ph1,type,optdata)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
evt_phase2(ph2,type,optdata)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
evt_subscribe(list,fd)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, 0);
377
378 plog(LLV_DEBUG, LOCATION, NULL,
379 "[%d] admin connection is polling events\n", fd);
380
381 return -2;
382 }
383
384 void
evt_list_init(list)385 evt_list_init(list)
386 struct evt_listener_list *list;
387 {
388 LIST_INIT(list);
389 }
390
391 void
evt_list_cleanup(list)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 */
400