1 /* $NetBSD: evt.c,v 1.11 2018/05/19 20:14:56 maxv 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(int type,vchar_t * optdata)219 evtmsg_create(int type, vchar_t *optdata)
220 {
221 struct evt_message *e;
222 size_t len;
223
224 len = sizeof(struct evt_message);
225 if (optdata != NULL)
226 len += optdata->l;
227
228 if ((e = racoon_malloc(len)) == NULL) {
229 plog(LLV_ERROR, LOCATION, NULL, "Cannot allocate event: %s\n",
230 strerror(errno));
231 return NULL;
232 }
233
234 memset(e, 0, sizeof(struct evt_message));
235 e->adm.ac_len = len;
236 e->adm.ac_cmd = ADMIN_SHOW_EVT;
237 e->adm.ac_errno = 0;
238 e->adm.ac_proto = 0;
239 e->evt.ec_type = type;
240 time(&e->evt.ec_timestamp);
241 if (optdata != NULL)
242 memcpy(e + 1, optdata->v, optdata->l);
243
244 return e;
245 }
246
247 static void
evt_unsubscribe(struct evt_listener * l)248 evt_unsubscribe(struct evt_listener *l)
249 {
250 plog(LLV_DEBUG, LOCATION, NULL,
251 "[%d] admin connection released\n", l->fd);
252
253 LIST_REMOVE(l, ll_chain);
254 unmonitor_fd(l->fd);
255 close(l->fd);
256 racoon_free(l);
257 }
258
259 static int
evt_unsubscribe_cb(void * ctx,int fd)260 evt_unsubscribe_cb(void *ctx, int fd)
261 {
262 evt_unsubscribe((struct evt_listener *) ctx);
263 return 0;
264 }
265
266 static void
evtmsg_broadcast(const struct evt_listener_list * ll,struct evt_message * e)267 evtmsg_broadcast(const struct evt_listener_list *ll, struct evt_message *e)
268 {
269 struct evt_listener *l, *nl;
270
271 for (l = LIST_FIRST(ll); l != NULL; l = nl) {
272 nl = LIST_NEXT(l, ll_chain);
273
274 if (send(l->fd, e, e->adm.ac_len, MSG_DONTWAIT) < 0) {
275 plog(LLV_DEBUG, LOCATION, NULL, "Cannot send event to fd: %s\n",
276 strerror(errno));
277 evt_unsubscribe(l);
278 }
279 }
280 }
281
282 void
evt_generic(type,optdata)283 evt_generic(type, optdata)
284 int type;
285 vchar_t *optdata;
286 {
287 struct evt_message *e;
288
289 if ((e = evtmsg_create(type, optdata)) == NULL)
290 return;
291
292 evtmsg_broadcast(&evt_listeners, e);
293 evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
294
295 racoon_free(e);
296 }
297
298 void
evt_phase1(ph1,type,optdata)299 evt_phase1(ph1, type, optdata)
300 const struct ph1handle *ph1;
301 int type;
302 vchar_t *optdata;
303 {
304 struct evt_message *e;
305
306 if ((e = evtmsg_create(type, optdata)) == NULL)
307 return;
308
309 if (ph1->local)
310 memcpy(&e->evt.ec_ph1src, ph1->local, sysdep_sa_len(ph1->local));
311 if (ph1->remote)
312 memcpy(&e->evt.ec_ph1dst, ph1->remote, sysdep_sa_len(ph1->remote));
313
314 evtmsg_broadcast(&ph1->evt_listeners, e);
315 evtmsg_broadcast(&evt_listeners, e);
316 evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
317
318 racoon_free(e);
319 }
320
321 void
evt_phase2(ph2,type,optdata)322 evt_phase2(ph2, type, optdata)
323 const struct ph2handle *ph2;
324 int type;
325 vchar_t *optdata;
326 {
327 struct evt_message *e;
328 struct ph1handle *ph1 = ph2->ph1;
329
330 if ((e = evtmsg_create(type, optdata)) == NULL)
331 return;
332
333 if (ph1) {
334 if (ph1->local)
335 memcpy(&e->evt.ec_ph1src, ph1->local, sysdep_sa_len(ph1->local));
336 if (ph1->remote)
337 memcpy(&e->evt.ec_ph1dst, ph1->remote, sysdep_sa_len(ph1->remote));
338 }
339 e->evt.ec_ph2msgid = ph2->msgid;
340
341 evtmsg_broadcast(&ph2->evt_listeners, e);
342 if (ph1)
343 evtmsg_broadcast(&ph1->evt_listeners, e);
344 evtmsg_broadcast(&evt_listeners, e);
345 evt_push(&e->evt.ec_ph1src, &e->evt.ec_ph1dst, type, optdata);
346
347 racoon_free(e);
348 }
349
350 int
evt_subscribe(list,fd)351 evt_subscribe(list, fd)
352 struct evt_listener_list *list;
353 int fd;
354 {
355 struct evt_listener *l;
356
357 if ((l = racoon_malloc(sizeof(*l))) == NULL) {
358 plog(LLV_ERROR, LOCATION, NULL,
359 "Cannot allocate event listener: %s\n",
360 strerror(errno));
361 return errno;
362 }
363
364 if (list == NULL)
365 list = &evt_listeners;
366
367 LIST_INSERT_HEAD(list, l, ll_chain);
368 l->fd = fd;
369 monitor_fd(l->fd, evt_unsubscribe_cb, l, 0);
370
371 plog(LLV_DEBUG, LOCATION, NULL,
372 "[%d] admin connection is polling events\n", fd);
373
374 return -2;
375 }
376
377 void
evt_list_init(list)378 evt_list_init(list)
379 struct evt_listener_list *list;
380 {
381 LIST_INIT(list);
382 }
383
384 void
evt_list_cleanup(list)385 evt_list_cleanup(list)
386 struct evt_listener_list *list;
387 {
388 while (!LIST_EMPTY(list))
389 evt_unsubscribe(LIST_FIRST(list));
390 }
391
392 #endif /* ENABLE_ADMINPORT */
393