xref: /netbsd-src/crypto/dist/ipsec-tools/src/racoon/evt.c (revision 165b31ce969841b1b96165ce3c8c8b91653ed8df)
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