eb2c4b330b974ed3c9e8c593ca7e84774e005cb9
[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 * 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 int netbits = 32;
91 host_t *net;
92 char *pos;
93
94 string = strdupa(string);
95 pos = strchr(string, '/');
96 if (pos)
97 {
98 *pos++ = '\0';
99 netbits = atoi(pos);
100 }
101 else
102 {
103 if (strchr(string, ':'))
104 {
105 netbits = 128;
106 }
107 }
108 net = host_create_from_string(string, 0);
109 if (net)
110 {
111 return traffic_selector_create_from_subnet(net, netbits, 0, 0);
112 }
113 }
114 return traffic_selector_create_dynamic(0, 0, 65535);
115 }
116
117 /**
118 * create a rekey time from a string with hours, with fallback
119 */
120 static u_int create_rekey(char *string)
121 {
122 u_int rekey = 0;
123
124 if (string)
125 {
126 rekey = atoi(string);
127 if (rekey)
128 {
129 return rekey * 3600;
130 }
131 }
132 /* every 12 hours */
133 return 12 * 3600;
134 }
135
136 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
137 peer_enumerator_t *this, peer_cfg_t **cfg)
138 {
139 char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
140 char *local_id, *local_addr, *local_net;
141 char *remote_id, *remote_addr, *remote_net;
142 child_cfg_t *child_cfg;
143 ike_cfg_t *ike_cfg;
144 auth_cfg_t *auth;
145 lifetime_cfg_t lifetime = {
146 .time = {
147 .life = create_rekey(esp_rekey) + 300,
148 .rekey = create_rekey(esp_rekey),
149 .jitter = 300
150 }
151 };
152
153 /* defaults */
154 name = "unnamed";
155 local_id = NULL;
156 remote_id = NULL;
157 local_addr = "0.0.0.0";
158 remote_addr = "0.0.0.0";
159 local_net = NULL;
160 remote_net = NULL;
161 ike_proposal = NULL;
162 esp_proposal = NULL;
163 ike_rekey = NULL;
164 esp_rekey = NULL;
165
166 if (this->inner->enumerate(this->inner, &name, &local_id, &remote_id,
167 &local_addr, &remote_addr, &local_net, &remote_net,
168 &ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
169 {
170 DESTROY_IF(this->peer_cfg);
171 ike_cfg = ike_cfg_create(FALSE, FALSE,
172 local_addr, IKEV2_UDP_PORT, remote_addr, IKEV2_UDP_PORT);
173 ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
174 this->peer_cfg = peer_cfg_create(
175 name, IKEV2, ike_cfg, CERT_SEND_IF_ASKED, UNIQUE_NO,
176 1, create_rekey(ike_rekey), 0, /* keytries, rekey, reauth */
177 1800, 900, /* jitter, overtime */
178 TRUE, FALSE, /* mobike, aggressive */
179 60, 0, /* DPD delay, timeout */
180 NULL, NULL, /* vip, pool */
181 FALSE, NULL, NULL); /* mediation, med by, peer id */
182 auth = auth_cfg_create();
183 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
184 auth->add(auth, AUTH_RULE_IDENTITY,
185 identification_create_from_string(local_id));
186 this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, TRUE);
187
188 auth = auth_cfg_create();
189 auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
190 if (remote_id)
191 {
192 auth->add(auth, AUTH_RULE_IDENTITY,
193 identification_create_from_string(remote_id));
194 }
195 this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, FALSE);
196
197 child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
198 ACTION_NONE, ACTION_NONE, ACTION_NONE,
199 FALSE, 0, 0, NULL, NULL, 0);
200 child_cfg->add_proposal(child_cfg, create_proposal(esp_proposal, PROTO_ESP));
201 child_cfg->add_traffic_selector(child_cfg, TRUE, create_ts(local_net));
202 child_cfg->add_traffic_selector(child_cfg, FALSE, create_ts(remote_net));
203 this->peer_cfg->add_child_cfg(this->peer_cfg, child_cfg);
204 *cfg = this->peer_cfg;
205 return TRUE;
206 }
207 return FALSE;
208 }
209
210
211 METHOD(enumerator_t, peer_enumerator_destroy, void,
212 peer_enumerator_t *this)
213 {
214 DESTROY_IF(this->peer_cfg);
215 this->inner->destroy(this->inner);
216 free(this);
217 }
218
219 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
220 private_uci_config_t *this, identification_t *me, identification_t *other)
221 {
222 peer_enumerator_t *e;
223
224 INIT(e,
225 .public = {
226 .enumerate = (void*)_peer_enumerator_enumerate,
227 .destroy = _peer_enumerator_destroy,
228 },
229 .inner = this->parser->create_section_enumerator(this->parser,
230 "local_id", "remote_id", "local_addr", "remote_addr",
231 "local_net", "remote_net", "ike_proposal", "esp_proposal",
232 "ike_rekey", "esp_rekey", NULL),
233 );
234 if (!e->inner)
235 {
236 free(e);
237 return NULL;
238 }
239 return &e->public;
240 }
241
242 /**
243 * enumerator implementation for create_ike_cfg_enumerator
244 */
245 typedef struct {
246 /** implements enumerator */
247 enumerator_t public;
248 /** currently enumerated ike config */
249 ike_cfg_t *ike_cfg;
250 /** inner uci_parser section enumerator */
251 enumerator_t *inner;
252 } ike_enumerator_t;
253
254 METHOD(enumerator_t, ike_enumerator_enumerate, bool,
255 ike_enumerator_t *this, ike_cfg_t **cfg)
256 {
257 char *local_addr, *remote_addr, *ike_proposal;
258
259 /* defaults */
260 local_addr = "0.0.0.0";
261 remote_addr = "0.0.0.0";
262 ike_proposal = NULL;
263
264 if (this->inner->enumerate(this->inner, NULL,
265 &local_addr, &remote_addr, &ike_proposal))
266 {
267 DESTROY_IF(this->ike_cfg);
268 this->ike_cfg = ike_cfg_create(FALSE, FALSE, local_addr, IKEV2_UDP_PORT,
269 remote_addr, IKEV2_UDP_PORT);
270 this->ike_cfg->add_proposal(this->ike_cfg,
271 create_proposal(ike_proposal, PROTO_IKE));
272
273 *cfg = this->ike_cfg;
274 return TRUE;
275 }
276 return FALSE;
277 }
278
279 METHOD(enumerator_t, ike_enumerator_destroy, void,
280 ike_enumerator_t *this)
281 {
282 DESTROY_IF(this->ike_cfg);
283 this->inner->destroy(this->inner);
284 free(this);
285 }
286
287 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
288 private_uci_config_t *this, host_t *me, host_t *other)
289 {
290 ike_enumerator_t *e;
291
292 INIT(e,
293 .public = {
294 .enumerate = (void*)_ike_enumerator_enumerate,
295 .destroy = _ike_enumerator_destroy,
296 },
297 .inner = this->parser->create_section_enumerator(this->parser,
298 "local_addr", "remote_addr", "ike_proposal", NULL),
299 );
300 if (!e->inner)
301 {
302 free(e);
303 return NULL;
304 }
305 return &e->public;
306 }
307
308 METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
309 private_uci_config_t *this, char *name)
310 {
311 enumerator_t *enumerator;
312 peer_cfg_t *current, *found = NULL;
313
314 enumerator = create_peer_cfg_enumerator(this, NULL, NULL);
315 if (enumerator)
316 {
317 while (enumerator->enumerate(enumerator, &current))
318 {
319 if (streq(name, current->get_name(current)))
320 {
321 found = current->get_ref(current);
322 break;
323 }
324 }
325 enumerator->destroy(enumerator);
326 }
327 return found;
328 }
329
330 METHOD(uci_config_t, destroy, void,
331 private_uci_config_t *this)
332 {
333 free(this);
334 }
335
336 /**
337 * Described in header.
338 */
339 uci_config_t *uci_config_create(uci_parser_t *parser)
340 {
341 private_uci_config_t *this;
342
343 INIT(this,
344 .public = {
345 .backend = {
346 .create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
347 .create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
348 .get_peer_cfg_by_name = _get_peer_cfg_by_name,
349 },
350 .destroy = _destroy,
351 },
352 .parser = parser,
353 );
354
355 return &this->public;
356 }
357