bus->listen() and the controller wrappers accept a timeout to wait for callbacks
[strongswan.git] / src / libcharon / plugins / medcli / medcli_config.c
1 /*
2 * Copyright (C) 2008 Martin Willi
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15
16 #define _GNU_SOURCE
17 #include <string.h>
18
19 #include "medcli_config.h"
20
21 #include <daemon.h>
22 #include <processing/jobs/callback_job.h>
23
24 typedef struct private_medcli_config_t private_medcli_config_t;
25
26 /**
27 * Private data of an medcli_config_t object
28 */
29 struct private_medcli_config_t {
30
31 /**
32 * Public part
33 */
34 medcli_config_t public;
35
36 /**
37 * database connection
38 */
39 database_t *db;
40
41 /**
42 * rekey time
43 */
44 int rekey;
45
46 /**
47 * dpd delay
48 */
49 int dpd;
50
51 /**
52 * default ike config
53 */
54 ike_cfg_t *ike;
55 };
56
57 /**
58 * create a traffic selector from a CIDR notation string
59 */
60 static traffic_selector_t *ts_from_string(char *str)
61 {
62 if (str)
63 {
64 int netbits = 32;
65 host_t *net;
66 char *pos;
67
68 str = strdupa(str);
69 pos = strchr(str, '/');
70 if (pos)
71 {
72 *pos++ = '\0';
73 netbits = atoi(pos);
74 }
75 else
76 {
77 if (strchr(str, ':'))
78 {
79 netbits = 128;
80 }
81 }
82 net = host_create_from_string(str, 0);
83 if (net)
84 {
85 return traffic_selector_create_from_subnet(net, netbits, 0, 0);
86 }
87 }
88 return traffic_selector_create_dynamic(0, 0, 65535);
89 }
90
91 /**
92 * implements backend_t.get_peer_cfg_by_name.
93 */
94 static peer_cfg_t *get_peer_cfg_by_name(private_medcli_config_t *this, char *name)
95 {
96 enumerator_t *e;
97 peer_cfg_t *peer_cfg, *med_cfg;
98 auth_cfg_t *auth;
99 ike_cfg_t *ike_cfg;
100 child_cfg_t *child_cfg;
101 chunk_t me, other;
102 char *address, *local_net, *remote_net;
103 lifetime_cfg_t lifetime = {
104 .time = {
105 .life = this->rekey * 60 + this->rekey,
106 .rekey = this->rekey,
107 .jitter = this->rekey
108 }
109 };
110
111 /* query mediation server config:
112 * - build ike_cfg/peer_cfg for mediation connection on-the-fly
113 */
114 e = this->db->query(this->db,
115 "SELECT Address, ClientConfig.KeyId, MediationServerConfig.KeyId "
116 "FROM MediationServerConfig JOIN ClientConfig",
117 DB_TEXT, DB_BLOB, DB_BLOB);
118 if (!e || !e->enumerate(e, &address, &me, &other))
119 {
120 DESTROY_IF(e);
121 return NULL;
122 }
123 ike_cfg = ike_cfg_create(FALSE, FALSE,
124 "0.0.0.0", IKEV2_UDP_PORT, address, IKEV2_UDP_PORT);
125 ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
126 med_cfg = peer_cfg_create(
127 "mediation", 2, ike_cfg,
128 CERT_NEVER_SEND, UNIQUE_REPLACE,
129 1, this->rekey*60, 0, /* keytries, rekey, reauth */
130 this->rekey*5, this->rekey*3, /* jitter, overtime */
131 TRUE, this->dpd, /* mobike, dpddelay */
132 NULL, NULL, /* vip, pool */
133 TRUE, NULL, NULL); /* mediation, med by, peer id */
134 e->destroy(e);
135
136 auth = auth_cfg_create();
137 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
138 auth->add(auth, AUTH_RULE_IDENTITY,
139 identification_create_from_encoding(ID_KEY_ID, me));
140 med_cfg->add_auth_cfg(med_cfg, auth, TRUE);
141 auth = auth_cfg_create();
142 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
143 auth->add(auth, AUTH_RULE_IDENTITY,
144 identification_create_from_encoding(ID_KEY_ID, other));
145 med_cfg->add_auth_cfg(med_cfg, auth, FALSE);
146
147 /* query mediated config:
148 * - use any-any ike_cfg
149 * - build peer_cfg on-the-fly using med_cfg
150 * - add a child_cfg
151 */
152 e = this->db->query(this->db,
153 "SELECT ClientConfig.KeyId, Connection.KeyId, "
154 "Connection.LocalSubnet, Connection.RemoteSubnet "
155 "FROM ClientConfig JOIN Connection "
156 "WHERE Active AND Alias = ?", DB_TEXT, name,
157 DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
158 if (!e || !e->enumerate(e, &me, &other, &local_net, &remote_net))
159 {
160 DESTROY_IF(e);
161 return NULL;
162 }
163 peer_cfg = peer_cfg_create(
164 name, 2, this->ike->get_ref(this->ike),
165 CERT_NEVER_SEND, UNIQUE_REPLACE,
166 1, this->rekey*60, 0, /* keytries, rekey, reauth */
167 this->rekey*5, this->rekey*3, /* jitter, overtime */
168 TRUE, this->dpd, /* mobike, dpddelay */
169 NULL, NULL, /* vip, pool */
170 FALSE, med_cfg, /* mediation, med by */
171 identification_create_from_encoding(ID_KEY_ID, other));
172
173 auth = auth_cfg_create();
174 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
175 auth->add(auth, AUTH_RULE_IDENTITY,
176 identification_create_from_encoding(ID_KEY_ID, me));
177 peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
178 auth = auth_cfg_create();
179 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
180 auth->add(auth, AUTH_RULE_IDENTITY,
181 identification_create_from_encoding(ID_KEY_ID, other));
182 peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
183
184 child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
185 ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
186 0, 0, NULL, NULL, 0);
187 child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
188 child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
189 child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
190 peer_cfg->add_child_cfg(peer_cfg, child_cfg);
191 e->destroy(e);
192 return peer_cfg;
193 }
194
195 /**
196 * Implementation of backend_t.create_ike_cfg_enumerator.
197 */
198 static enumerator_t* create_ike_cfg_enumerator(private_medcli_config_t *this,
199 host_t *me, host_t *other)
200 {
201 return enumerator_create_single(this->ike, NULL);
202 }
203
204 typedef struct {
205 /** implements enumerator */
206 enumerator_t public;
207 /** inner SQL enumerator */
208 enumerator_t *inner;
209 /** currently enumerated peer config */
210 peer_cfg_t *current;
211 /** ike cfg to use in peer cfg */
212 ike_cfg_t *ike;
213 /** rekey time */
214 int rekey;
215 /** dpd time */
216 int dpd;
217 } peer_enumerator_t;
218
219 /**
220 * Implementation of peer_enumerator_t.public.enumerate
221 */
222 static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
223 {
224 char *name, *local_net, *remote_net;
225 chunk_t me, other;
226 child_cfg_t *child_cfg;
227 auth_cfg_t *auth;
228 lifetime_cfg_t lifetime = {
229 .time = {
230 .life = this->rekey * 60 + this->rekey,
231 .rekey = this->rekey,
232 .jitter = this->rekey
233 }
234 };
235
236 DESTROY_IF(this->current);
237 if (!this->inner->enumerate(this->inner, &name, &me, &other,
238 &local_net, &remote_net))
239 {
240 this->current = NULL;
241 return FALSE;
242 }
243 this->current = peer_cfg_create(
244 name, 2, this->ike->get_ref(this->ike),
245 CERT_NEVER_SEND, UNIQUE_REPLACE,
246 1, this->rekey*60, 0, /* keytries, rekey, reauth */
247 this->rekey*5, this->rekey*3, /* jitter, overtime */
248 TRUE, this->dpd, /* mobike, dpddelay */
249 NULL, NULL, /* vip, pool */
250 FALSE, NULL, NULL); /* mediation, med by, peer id */
251
252 auth = auth_cfg_create();
253 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
254 auth->add(auth, AUTH_RULE_IDENTITY,
255 identification_create_from_encoding(ID_KEY_ID, me));
256 this->current->add_auth_cfg(this->current, auth, TRUE);
257 auth = auth_cfg_create();
258 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
259 auth->add(auth, AUTH_RULE_IDENTITY,
260 identification_create_from_encoding(ID_KEY_ID, other));
261 this->current->add_auth_cfg(this->current, auth, FALSE);
262
263 child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
264 ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
265 0, 0, NULL, NULL, 0);
266 child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
267 child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
268 child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
269 this->current->add_child_cfg(this->current, child_cfg);
270 *cfg = this->current;
271 return TRUE;
272 }
273
274 /**
275 * Implementation of peer_enumerator_t.public.destroy
276 */
277 static void peer_enumerator_destroy(peer_enumerator_t *this)
278 {
279 DESTROY_IF(this->current);
280 this->inner->destroy(this->inner);
281 free(this);
282 }
283
284 /**
285 * Implementation of backend_t.create_peer_cfg_enumerator.
286 */
287 static enumerator_t* create_peer_cfg_enumerator(private_medcli_config_t *this,
288 identification_t *me,
289 identification_t *other)
290 {
291 peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
292
293 e->current = NULL;
294 e->ike = this->ike;
295 e->rekey = this->rekey;
296 e->dpd = this->dpd;
297 e->public.enumerate = (void*)peer_enumerator_enumerate;
298 e->public.destroy = (void*)peer_enumerator_destroy;
299
300 /* filter on IDs: NULL or ANY or matching KEY_ID */
301 e->inner = this->db->query(this->db,
302 "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
303 "Connection.LocalSubnet, Connection.RemoteSubnet "
304 "FROM ClientConfig JOIN Connection "
305 "WHERE Active AND "
306 "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
307 DB_INT, me == NULL || me->get_type(me) == ID_ANY,
308 DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
309 me->get_encoding(me) : chunk_empty,
310 DB_INT, other == NULL || other->get_type(other) == ID_ANY,
311 DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
312 other->get_encoding(other) : chunk_empty,
313 DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
314 if (!e->inner)
315 {
316 free(e);
317 return NULL;
318 }
319 return &e->public;
320 }
321
322 /**
323 * initiate a peer config
324 */
325 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
326 {
327 enumerator_t *enumerator;
328 child_cfg_t *child_cfg = NULL;;
329
330 enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
331 enumerator->enumerate(enumerator, &child_cfg);
332 if (child_cfg)
333 {
334 child_cfg->get_ref(child_cfg);
335 peer_cfg->get_ref(peer_cfg);
336 enumerator->destroy(enumerator);
337 charon->controller->initiate(charon->controller,
338 peer_cfg, child_cfg, NULL, NULL, 0);
339 }
340 else
341 {
342 enumerator->destroy(enumerator);
343 }
344 return JOB_REQUEUE_NONE;
345 }
346
347 /**
348 * schedule initiation of all "active" connections
349 */
350 static void schedule_autoinit(private_medcli_config_t *this)
351 {
352 enumerator_t *e;
353 char *name;
354
355 e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
356 DB_TEXT);
357 if (e)
358 {
359 while (e->enumerate(e, &name))
360 {
361 peer_cfg_t *peer_cfg;
362
363 peer_cfg = get_peer_cfg_by_name(this, name);
364 if (peer_cfg)
365 {
366 /* schedule asynchronous initiation job */
367 lib->processor->queue_job(lib->processor,
368 (job_t*)callback_job_create(
369 (callback_job_cb_t)initiate_config,
370 peer_cfg, (void*)peer_cfg->destroy, NULL));
371 }
372 }
373 e->destroy(e);
374 }
375 }
376
377 /**
378 * Implementation of medcli_config_t.destroy.
379 */
380 static void destroy(private_medcli_config_t *this)
381 {
382 this->ike->destroy(this->ike);
383 free(this);
384 }
385
386 /**
387 * Described in header.
388 */
389 medcli_config_t *medcli_config_create(database_t *db)
390 {
391 private_medcli_config_t *this = malloc_thing(private_medcli_config_t);
392
393 this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
394 this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
395 this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
396 this->public.destroy = (void(*)(medcli_config_t*))destroy;
397
398 this->db = db;
399 this->rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200);
400 this->dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300);
401 this->ike = ike_cfg_create(FALSE, FALSE,
402 "0.0.0.0", IKEV2_UDP_PORT, "0.0.0.0", IKEV2_UDP_PORT);
403 this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
404
405 schedule_autoinit(this);
406
407 return &this->public;
408 }
409