Merge branch 'childless'
[strongswan.git] / src / libcharon / plugins / uci / uci_config.c
1 /*
2 * Copyright (C) 2008 Thomas Kallenberg
3 * Copyright (C) 2008 Tobias Brunner
4 * Copyright (C) 2008 Martin Willi
5 * HSR Hochschule fuer Technik Rapperswil
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 */
17
18 #define _GNU_SOURCE
19 #include <string.h>
20
21 #include "uci_config.h"
22 #include "uci_parser.h"
23
24 #include <daemon.h>
25
26 typedef struct private_uci_config_t private_uci_config_t;
27
28 /**
29 * Private data of an uci_config_t object
30 */
31 struct private_uci_config_t {
32
33 /**
34 * Public part
35 */
36 uci_config_t public;
37
38 /**
39 * UCI parser context
40 */
41 uci_parser_t *parser;
42 };
43
44 /**
45 * enumerator implementation for create_peer_cfg_enumerator
46 */
47 typedef struct {
48 /** implements enumerator */
49 enumerator_t public;
50 /** currently enumerated peer config */
51 peer_cfg_t *peer_cfg;
52 /** inner uci_parser section enumerator */
53 enumerator_t *inner;
54 } peer_enumerator_t;
55
56 /**
57 * create a proposal from a string, with fallback to default
58 */
59 static proposal_t *create_proposal(char *string, protocol_id_t proto)
60 {
61 proposal_t *proposal = NULL;
62
63 if (string)
64 {
65 proposal = proposal_create_from_string(proto, string);
66 }
67 if (!proposal)
68 { /* UCI default is aes/sha1 only */
69 if (proto == PROTO_IKE)
70 {
71 proposal = proposal_create_from_string(proto,
72 "aes128-aes192-aes256-sha1-modp1536-modp2048");
73 }
74 else
75 {
76 proposal = proposal_create_from_string(proto,
77 "aes128-aes192-aes256-sha1");
78 }
79 }
80 return proposal;
81 }
82
83 /**
84 * create an traffic selector, fallback to dynamic
85 */
86 static traffic_selector_t *create_ts(char *string)
87 {
88 if (string)
89 {
90 traffic_selector_t *ts;
91
92 ts = traffic_selector_create_from_cidr(string, 0, 0, 65535);
93 if (ts)
94 {
95 return ts;
96 }
97 }
98 return traffic_selector_create_dynamic(0, 0, 65535);
99 }
100
101 /**
102 * create a rekey time from a string with hours, with fallback
103 */
104 static u_int create_rekey(char *string)
105 {
106 u_int rekey = 0;
107
108 if (string)
109 {
110 rekey = atoi(string);
111 if (rekey)
112 {
113 return rekey * 3600;
114 }
115 }
116 /* every 12 hours */
117 return 12 * 3600;
118 }
119
120 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
121 peer_enumerator_t *this, va_list args)
122 {
123 char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
124 char *local_id, *local_net, *remote_id, *remote_net;
125 peer_cfg_t **cfg;
126 child_cfg_t *child_cfg;
127 ike_cfg_t *ike_cfg;
128 auth_cfg_t *auth;
129 ike_cfg_create_t ike = {
130 .version = IKEV2,
131 .local = "0.0.0.0",
132 .local_port = charon->socket->get_port(charon->socket, FALSE),
133 .remote = "0.0.0.0",
134 .remote_port = IKEV2_UDP_PORT,
135 .no_certreq = TRUE,
136 };
137 peer_cfg_create_t peer = {
138 .cert_policy = CERT_SEND_IF_ASKED,
139 .unique = UNIQUE_NO,
140 .keyingtries = 1,
141 .jitter_time = 1800,
142 .over_time = 900,
143 .dpd = 60,
144 };
145 child_cfg_create_t child = {
146 .lifetime = {
147 .time = {
148 .life = create_rekey(esp_rekey) + 300,
149 .rekey = create_rekey(esp_rekey),
150 .jitter = 300
151 },
152 },
153 .mode = MODE_TUNNEL,
154 };
155
156 VA_ARGS_VGET(args, cfg);
157
158 /* defaults */
159 name = "unnamed";
160 local_id = NULL;
161 remote_id = NULL;
162 local_net = NULL;
163 remote_net = NULL;
164 ike_proposal = NULL;
165 esp_proposal = NULL;
166 ike_rekey = NULL;
167 esp_rekey = NULL;
168
169 if (this->inner->enumerate(this->inner, &name, &local_id, &remote_id,
170 &ike.local, &ike.remote, &local_net, &remote_net,
171 &ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
172 {
173
174 DESTROY_IF(this->peer_cfg);
175 ike_cfg = ike_cfg_create(&ike);
176 ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
177 peer.rekey_time = create_rekey(ike_rekey);
178 this->peer_cfg = peer_cfg_create(name, ike_cfg, &peer);
179 auth = auth_cfg_create();
180 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
181 auth->add(auth, AUTH_RULE_IDENTITY,
182 identification_create_from_string(local_id));
183 this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, TRUE);
184
185 auth = auth_cfg_create();
186 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
187 if (remote_id)
188 {
189 auth->add(auth, AUTH_RULE_IDENTITY,
190 identification_create_from_string(remote_id));
191 }
192 this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, FALSE);
193
194 child_cfg = child_cfg_create(name, &child);
195 child_cfg->add_proposal(child_cfg, create_proposal(esp_proposal, PROTO_ESP));
196 child_cfg->add_traffic_selector(child_cfg, TRUE, create_ts(local_net));
197 child_cfg->add_traffic_selector(child_cfg, FALSE, create_ts(remote_net));
198 this->peer_cfg->add_child_cfg(this->peer_cfg, child_cfg);
199 *cfg = this->peer_cfg;
200 return TRUE;
201 }
202 return FALSE;
203 }
204
205
206 METHOD(enumerator_t, peer_enumerator_destroy, void,
207 peer_enumerator_t *this)
208 {
209 DESTROY_IF(this->peer_cfg);
210 this->inner->destroy(this->inner);
211 free(this);
212 }
213
214 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
215 private_uci_config_t *this, identification_t *me, identification_t *other)
216 {
217 peer_enumerator_t *e;
218
219 INIT(e,
220 .public = {
221 .enumerate = enumerator_enumerate_default,
222 .venumerate = _peer_enumerator_enumerate,
223 .destroy = _peer_enumerator_destroy,
224 },
225 .inner = this->parser->create_section_enumerator(this->parser,
226 "local_id", "remote_id", "local_addr", "remote_addr",
227 "local_net", "remote_net", "ike_proposal", "esp_proposal",
228 "ike_rekey", "esp_rekey", NULL),
229 );
230 if (!e->inner)
231 {
232 free(e);
233 return NULL;
234 }
235 return &e->public;
236 }
237
238 /**
239 * enumerator implementation for create_ike_cfg_enumerator
240 */
241 typedef struct {
242 /** implements enumerator */
243 enumerator_t public;
244 /** currently enumerated ike config */
245 ike_cfg_t *ike_cfg;
246 /** inner uci_parser section enumerator */
247 enumerator_t *inner;
248 } ike_enumerator_t;
249
250 METHOD(enumerator_t, ike_enumerator_enumerate, bool,
251 ike_enumerator_t *this, va_list args)
252 {
253 ike_cfg_t **cfg;
254 ike_cfg_create_t ike = {
255 .version = IKEV2,
256 .local = "0.0.0.0",
257 .local_port = charon->socket->get_port(charon->socket, FALSE),
258 .remote = "0.0.0.0",
259 .remote_port = IKEV2_UDP_PORT,
260 .no_certreq = TRUE,
261 };
262 char *ike_proposal;
263
264 VA_ARGS_VGET(args, cfg);
265
266 /* defaults */
267 ike_proposal = NULL;
268
269 if (this->inner->enumerate(this->inner, NULL,
270 &ike.local, &ike.remote, &ike_proposal))
271 {
272 DESTROY_IF(this->ike_cfg);
273 this->ike_cfg = ike_cfg_create(&ike);
274 this->ike_cfg->add_proposal(this->ike_cfg,
275 create_proposal(ike_proposal, PROTO_IKE));
276
277 *cfg = this->ike_cfg;
278 return TRUE;
279 }
280 return FALSE;
281 }
282
283 METHOD(enumerator_t, ike_enumerator_destroy, void,
284 ike_enumerator_t *this)
285 {
286 DESTROY_IF(this->ike_cfg);
287 this->inner->destroy(this->inner);
288 free(this);
289 }
290
291 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
292 private_uci_config_t *this, host_t *me, host_t *other)
293 {
294 ike_enumerator_t *e;
295
296 INIT(e,
297 .public = {
298 .enumerate = enumerator_enumerate_default,
299 .venumerate = _ike_enumerator_enumerate,
300 .destroy = _ike_enumerator_destroy,
301 },
302 .inner = this->parser->create_section_enumerator(this->parser,
303 "local_addr", "remote_addr", "ike_proposal", NULL),
304 );
305 if (!e->inner)
306 {
307 free(e);
308 return NULL;
309 }
310 return &e->public;
311 }
312
313 METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
314 private_uci_config_t *this, char *name)
315 {
316 enumerator_t *enumerator;
317 peer_cfg_t *current, *found = NULL;
318
319 enumerator = create_peer_cfg_enumerator(this, NULL, NULL);
320 if (enumerator)
321 {
322 while (enumerator->enumerate(enumerator, &current))
323 {
324 if (streq(name, current->get_name(current)))
325 {
326 found = current->get_ref(current);
327 break;
328 }
329 }
330 enumerator->destroy(enumerator);
331 }
332 return found;
333 }
334
335 METHOD(uci_config_t, destroy, void,
336 private_uci_config_t *this)
337 {
338 free(this);
339 }
340
341 /**
342 * Described in header.
343 */
344 uci_config_t *uci_config_create(uci_parser_t *parser)
345 {
346 private_uci_config_t *this;
347
348 INIT(this,
349 .public = {
350 .backend = {
351 .create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
352 .create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
353 .get_peer_cfg_by_name = _get_peer_cfg_by_name,
354 },
355 .destroy = _destroy,
356 },
357 .parser = parser,
358 );
359
360 return &this->public;
361 }