xpc: send a "connecting" event when establishing a connection starts
[strongswan.git] / src / frontends / osx / charon-xpc / xpc_channels.c
1 /*
2 * Copyright (C) 2013 Martin Willi
3 * Copyright (C) 2013 revosec AG
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 #include "xpc_channels.h"
17 #include "xpc_logger.h"
18
19 #include <credentials/sets/callback_cred.h>
20 #include <collections/hashtable.h>
21 #include <threading/rwlock.h>
22 #include <daemon.h>
23
24 typedef struct private_xpc_channels_t private_xpc_channels_t;
25
26 /**
27 * Private data of an xpc_channels_t object.
28 */
29 struct private_xpc_channels_t {
30
31 /**
32 * Public xpc_channels_t interface.
33 */
34 xpc_channels_t public;
35
36 /**
37 * Registered channels, IKE_SA unique ID => entry_t
38 */
39 hashtable_t *channels;
40
41 /**
42 * Lock for channels list
43 */
44 rwlock_t *lock;
45
46 /**
47 * Callback credential set for passwords
48 */
49 callback_cred_t *creds;
50 };
51
52 /**
53 * Channel entry
54 */
55 typedef struct {
56 /* XPC channel to App */
57 xpc_connection_t conn;
58 /* associated IKE_SA unique identifier */
59 uintptr_t sa;
60 /* did we already ask for a password? */
61 bool passworded;
62 /* channel specific logger */
63 xpc_logger_t *logger;
64 } entry_t;
65
66 /**
67 * Clean up an entry, cancelling connection
68 */
69 static void destroy_entry(entry_t *entry)
70 {
71 charon->bus->remove_logger(charon->bus, &entry->logger->logger);
72 entry->logger->destroy(entry->logger);
73 xpc_connection_suspend(entry->conn);
74 xpc_release(entry->conn);
75 free(entry);
76 }
77
78 /**
79 * Find an IKE_SA unique identifier by a given XPC channel
80 */
81 static u_int32_t find_ike_sa_by_conn(private_xpc_channels_t *this,
82 xpc_connection_t conn)
83 {
84 enumerator_t *enumerator;
85 entry_t *entry;
86 u_int32_t ike_sa = 0;
87
88 this->lock->read_lock(this->lock);
89 enumerator = this->channels->create_enumerator(this->channels);
90 while (enumerator->enumerate(enumerator, NULL, &entry))
91 {
92 if (entry->conn == conn)
93 {
94 ike_sa = entry->sa;
95 break;
96 }
97 }
98 enumerator->destroy(enumerator);
99 this->lock->unlock(this->lock);
100
101 return ike_sa;
102 }
103
104 /**
105 * Remove an entry for a given XPC connection
106 */
107 static void remove_conn(private_xpc_channels_t *this, xpc_connection_t conn)
108 {
109 uintptr_t ike_sa;
110 entry_t *entry;
111
112 ike_sa = find_ike_sa_by_conn(this, conn);
113 if (ike_sa)
114 {
115 this->lock->write_lock(this->lock);
116 entry = this->channels->remove(this->channels, (void*)ike_sa);
117 this->lock->unlock(this->lock);
118
119 if (entry)
120 {
121 destroy_entry(entry);
122 }
123 }
124 }
125
126 /**
127 * Trigger termination of a connection
128 */
129 static void stop_connection(private_xpc_channels_t *this, u_int32_t ike_sa,
130 xpc_object_t request, xpc_object_t reply)
131 {
132 status_t status;
133
134 status = charon->controller->terminate_ike(charon->controller, ike_sa,
135 NULL, NULL, 0);
136 xpc_dictionary_set_bool(reply, "success", status != NOT_FOUND);
137 }
138
139 /**
140 * XPC RPC command dispatch table
141 */
142 static struct {
143 char *name;
144 void (*handler)(private_xpc_channels_t *this, u_int32_t ike_sa,
145 xpc_object_t request, xpc_object_t reply);
146 } commands[] = {
147 { "stop_connection", stop_connection },
148 };
149
150 /**
151 * Handle a request message from App
152 */
153 static void handle(private_xpc_channels_t *this, xpc_connection_t conn,
154 xpc_object_t request)
155 {
156 xpc_object_t reply;
157 const char *type, *rpc;
158 bool found = FALSE;
159 u_int32_t ike_sa;
160 int i;
161
162 type = xpc_dictionary_get_string(request, "type");
163 if (type)
164 {
165 if (streq(type, "rpc"))
166 {
167 reply = xpc_dictionary_create_reply(request);
168 rpc = xpc_dictionary_get_string(request, "rpc");
169 ike_sa = find_ike_sa_by_conn(this, conn);
170 if (reply && rpc && ike_sa)
171 {
172 for (i = 0; i < countof(commands); i++)
173 {
174 if (streq(commands[i].name, rpc))
175 {
176 found = TRUE;
177 commands[i].handler(this, ike_sa, request, reply);
178 break;
179 }
180 }
181 }
182 if (!found)
183 {
184 DBG1(DBG_CFG, "received invalid XPC rpc command: %s", rpc);
185 }
186 if (reply)
187 {
188 xpc_connection_send_message(conn, reply);
189 xpc_release(reply);
190 }
191 }
192 else
193 {
194 DBG1(DBG_CFG, "received unknown XPC message type: %s", type);
195 }
196 }
197 else
198 {
199 DBG1(DBG_CFG, "received XPC message without a type");
200 }
201 }
202
203 METHOD(xpc_channels_t, add, void,
204 private_xpc_channels_t *this, xpc_connection_t conn, u_int32_t ike_sa)
205 {
206 entry_t *entry;
207
208 INIT(entry,
209 .conn = conn,
210 .sa = ike_sa,
211 .logger = xpc_logger_create(conn),
212 );
213
214 xpc_connection_set_event_handler(entry->conn, ^(xpc_object_t event)
215 {
216 if (event == XPC_ERROR_CONNECTION_INVALID ||
217 event == XPC_ERROR_CONNECTION_INTERRUPTED)
218 {
219 remove_conn(this, conn);
220 }
221 else if (xpc_get_type(event) == XPC_TYPE_DICTIONARY)
222 {
223 handle(this, conn, event);
224 }
225 });
226
227 entry->logger->set_ike_sa(entry->logger, entry->sa);
228 charon->bus->add_logger(charon->bus, &entry->logger->logger);
229
230 this->lock->write_lock(this->lock);
231 this->channels->put(this->channels, (void*)entry->sa, entry);
232 this->lock->unlock(this->lock);
233
234 xpc_connection_resume(conn);
235 }
236
237 METHOD(listener_t, ike_rekey, bool,
238 private_xpc_channels_t *this, ike_sa_t *old, ike_sa_t *new)
239 {
240 entry_t *entry;
241 uintptr_t sa;
242
243 sa = old->get_unique_id(old);
244 this->lock->write_lock(this->lock);
245 entry = this->channels->remove(this->channels, (void*)sa);
246 if (entry)
247 {
248 entry->sa = new->get_unique_id(new);
249 entry->logger->set_ike_sa(entry->logger, entry->sa);
250 this->channels->put(this->channels, (void*)entry->sa, entry);
251 }
252 this->lock->unlock(this->lock);
253
254 return TRUE;
255 }
256
257 METHOD(listener_t, ike_state_change, bool,
258 private_xpc_channels_t *this, ike_sa_t *ike_sa, ike_sa_state_t state)
259 {
260 if (state == IKE_CONNECTING)
261 {
262 entry_t *entry;
263 uintptr_t sa;
264
265 sa = ike_sa->get_unique_id(ike_sa);
266 this->lock->read_lock(this->lock);
267 entry = this->channels->get(this->channels, (void*)sa);
268 if (entry)
269 {
270 xpc_object_t msg;
271
272 msg = xpc_dictionary_create(NULL, NULL, 0);
273 xpc_dictionary_set_string(msg, "type", "event");
274 xpc_dictionary_set_string(msg, "event", "connecting");
275 xpc_connection_send_message(entry->conn, msg);
276 xpc_release(msg);
277 }
278 this->lock->unlock(this->lock);
279 }
280 return TRUE;
281 }
282
283 METHOD(listener_t, child_updown, bool,
284 private_xpc_channels_t *this, ike_sa_t *ike_sa,
285 child_sa_t *child_sa, bool up)
286 {
287 entry_t *entry;
288 uintptr_t sa;
289
290 sa = ike_sa->get_unique_id(ike_sa);
291 this->lock->read_lock(this->lock);
292 entry = this->channels->get(this->channels, (void*)sa);
293 if (entry)
294 {
295 xpc_object_t msg;
296 linked_list_t *list;
297 char buf[256];
298
299 msg = xpc_dictionary_create(NULL, NULL, 0);
300 xpc_dictionary_set_string(msg, "type", "event");
301 if (up)
302 {
303 xpc_dictionary_set_string(msg, "event", "child_up");
304 }
305 else
306 {
307 xpc_dictionary_set_string(msg, "event", "child_down");
308 }
309
310 list = child_sa->get_traffic_selectors(child_sa, TRUE);
311 snprintf(buf, sizeof(buf), "%#R", list);
312 xpc_dictionary_set_string(msg, "ts_local", buf);
313
314 list = child_sa->get_traffic_selectors(child_sa, FALSE);
315 snprintf(buf, sizeof(buf), "%#R", list);
316 xpc_dictionary_set_string(msg, "ts_remote", buf);
317
318 xpc_connection_send_message(entry->conn, msg);
319 xpc_release(msg);
320 }
321 this->lock->unlock(this->lock);
322 return TRUE;
323 }
324
325 METHOD(listener_t, ike_updown, bool,
326 private_xpc_channels_t *this, ike_sa_t *ike_sa, bool up)
327 {
328 xpc_object_t msg;
329 entry_t *entry;
330 uintptr_t sa;
331
332 sa = ike_sa->get_unique_id(ike_sa);
333 if (up)
334 {
335 this->lock->read_lock(this->lock);
336 entry = this->channels->get(this->channels, (void*)sa);
337 if (entry)
338 {
339 msg = xpc_dictionary_create(NULL, NULL, 0);
340 xpc_dictionary_set_string(msg, "type", "event");
341 xpc_dictionary_set_string(msg, "event", "up");
342 xpc_connection_send_message(entry->conn, msg);
343 xpc_release(msg);
344 }
345 this->lock->unlock(this->lock);
346 }
347 else
348 {
349 this->lock->write_lock(this->lock);
350 entry = this->channels->remove(this->channels, (void*)sa);
351 this->lock->unlock(this->lock);
352 if (entry)
353 {
354 msg = xpc_dictionary_create(NULL, NULL, 0);
355 xpc_dictionary_set_string(msg, "type", "event");
356 xpc_dictionary_set_string(msg, "event", "down");
357 xpc_connection_send_message(entry->conn, msg);
358 xpc_release(msg);
359 xpc_connection_send_barrier(entry->conn, ^() {
360 destroy_entry(entry);
361 });
362 }
363 }
364 return TRUE;
365 }
366
367 /**
368 * Query password from App using XPC channel
369 */
370 static shared_key_t *query_password(xpc_connection_t conn, identification_t *id)
371 {
372 char buf[128], *password;
373 xpc_object_t request, response;
374 shared_key_t *shared = NULL;
375
376 request = xpc_dictionary_create(NULL, NULL, 0);
377 xpc_dictionary_set_string(request, "type", "rpc");
378 xpc_dictionary_set_string(request, "rpc", "get_password");
379 snprintf(buf, sizeof(buf), "%Y", id);
380 xpc_dictionary_set_string(request, "username", buf);
381
382 response = xpc_connection_send_message_with_reply_sync(conn, request);
383 xpc_release(request);
384 if (xpc_get_type(response) == XPC_TYPE_DICTIONARY)
385 {
386 password = (char*)xpc_dictionary_get_string(response, "password");
387 if (password)
388 {
389 shared = shared_key_create(SHARED_EAP,
390 chunk_clone(chunk_from_str(password)));
391 }
392 }
393 xpc_release(response);
394 return shared;
395 }
396
397 /**
398 * Password query callback
399 */
400 static shared_key_t* password_cb(private_xpc_channels_t *this,
401 shared_key_type_t type,
402 identification_t *me, identification_t *other,
403 id_match_t *match_me, id_match_t *match_other)
404 {
405 shared_key_t *shared = NULL;
406 ike_sa_t *ike_sa;
407 entry_t *entry;
408 u_int32_t sa;
409
410 switch (type)
411 {
412 case SHARED_EAP:
413 break;
414 default:
415 return NULL;
416 }
417 ike_sa = charon->bus->get_sa(charon->bus);
418 if (ike_sa)
419 {
420 sa = ike_sa->get_unique_id(ike_sa);
421 this->lock->read_lock(this->lock);
422 entry = this->channels->get(this->channels, (void*)sa);
423 if (entry && !entry->passworded)
424 {
425 entry->passworded = TRUE;
426
427 shared = query_password(entry->conn, me);
428 if (shared)
429 {
430 if (match_me)
431 {
432 *match_me = ID_MATCH_PERFECT;
433 }
434 if (match_other)
435 {
436 *match_other = ID_MATCH_PERFECT;
437 }
438 }
439 }
440 this->lock->unlock(this->lock);
441 }
442 return shared;
443 }
444
445 METHOD(xpc_channels_t, destroy, void,
446 private_xpc_channels_t *this)
447 {
448 lib->credmgr->remove_set(lib->credmgr, &this->creds->set);
449 this->creds->destroy(this->creds);
450 this->channels->destroy(this->channels);
451 this->lock->destroy(this->lock);
452 free(this);
453 }
454
455 /**
456 * See header
457 */
458 xpc_channels_t *xpc_channels_create()
459 {
460 private_xpc_channels_t *this;
461
462 INIT(this,
463 .public = {
464 .listener = {
465 .ike_updown = _ike_updown,
466 .ike_rekey = _ike_rekey,
467 .ike_state_change = _ike_state_change,
468 .child_updown = _child_updown,
469 },
470 .add = _add,
471 .destroy = _destroy,
472 },
473 .channels = hashtable_create(hashtable_hash_ptr,
474 hashtable_equals_ptr, 4),
475 .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
476 );
477
478 this->creds = callback_cred_create_shared(
479 (callback_cred_shared_cb_t)password_cb, this);
480 lib->credmgr->add_set(lib->credmgr, &this->creds->set);
481
482 return &this->public;
483 }