Make accept(2) and recvfrom(2) cancellation points on Mac OS X.
[strongswan.git] / src / charon / plugins / stroke / stroke_socket.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 #include "stroke_socket.h"
17
18 #include <stdlib.h>
19 #include <sys/types.h>
20 #include <sys/stat.h>
21 #include <sys/socket.h>
22 #include <sys/un.h>
23 #include <sys/fcntl.h>
24 #include <unistd.h>
25 #include <errno.h>
26 #include <pthread.h>
27
28 #include <processing/jobs/callback_job.h>
29 #include <daemon.h>
30 #include <utils/mutex.h> /* for Mac OS X compatible accept */
31
32 #include "stroke_config.h"
33 #include "stroke_control.h"
34 #include "stroke_cred.h"
35 #include "stroke_ca.h"
36 #include "stroke_attribute.h"
37 #include "stroke_list.h"
38
39 typedef struct stroke_job_context_t stroke_job_context_t;
40 typedef struct private_stroke_socket_t private_stroke_socket_t;
41
42 /**
43 * private data of stroke_socket
44 */
45 struct private_stroke_socket_t {
46
47 /**
48 * public functions
49 */
50 stroke_socket_t public;
51
52 /**
53 * Unix socket to listen for strokes
54 */
55 int socket;
56
57 /**
58 * job accepting stroke messages
59 */
60 callback_job_t *job;
61
62 /**
63 * configuration backend
64 */
65 stroke_config_t *config;
66
67 /**
68 * attribute provider
69 */
70 stroke_attribute_t *attribute;
71
72 /**
73 * controller to control daemon
74 */
75 stroke_control_t *control;
76
77 /**
78 * credential set
79 */
80 stroke_cred_t *cred;
81
82 /**
83 * CA sections
84 */
85 stroke_ca_t *ca;
86
87 /**
88 * Status information logging
89 */
90 stroke_list_t *list;
91 };
92
93 /**
94 * job context to pass to processing thread
95 */
96 struct stroke_job_context_t {
97
98 /**
99 * file descriptor to read from
100 */
101 int fd;
102
103 /**
104 * global stroke interface
105 */
106 private_stroke_socket_t *this;
107 };
108
109 /**
110 * Helper function which corrects the string pointers
111 * in a stroke_msg_t. Strings in a stroke_msg sent over "wire"
112 * contains RELATIVE addresses (relative to the beginning of the
113 * stroke_msg). They must be corrected if they reach our address
114 * space...
115 */
116 static void pop_string(stroke_msg_t *msg, char **string)
117 {
118 if (*string == NULL)
119 {
120 return;
121 }
122
123 /* check for sanity of string pointer and string */
124 if (string < (char**)msg ||
125 string > (char**)msg + sizeof(stroke_msg_t) ||
126 (unsigned long)*string < (unsigned long)((char*)msg->buffer - (char*)msg) ||
127 (unsigned long)*string > msg->length)
128 {
129 *string = "(invalid pointer in stroke msg)";
130 }
131 else
132 {
133 *string = (char*)msg + (unsigned long)*string;
134 }
135 }
136
137 /**
138 * Pop the strings of a stroke_end_t struct and log them for debugging purposes
139 */
140 static void pop_end(stroke_msg_t *msg, const char* label, stroke_end_t *end)
141 {
142 pop_string(msg, &end->address);
143 pop_string(msg, &end->subnets);
144 pop_string(msg, &end->sourceip);
145 pop_string(msg, &end->auth);
146 pop_string(msg, &end->auth2);
147 pop_string(msg, &end->id);
148 pop_string(msg, &end->id2);
149 pop_string(msg, &end->cert);
150 pop_string(msg, &end->cert2);
151 pop_string(msg, &end->ca);
152 pop_string(msg, &end->ca2);
153 pop_string(msg, &end->groups);
154 pop_string(msg, &end->updown);
155
156 DBG2(DBG_CFG, " %s=%s", label, end->address);
157 DBG2(DBG_CFG, " %ssubnet=%s", label, end->subnets);
158 DBG2(DBG_CFG, " %ssourceip=%s", label, end->sourceip);
159 DBG2(DBG_CFG, " %sauth=%s", label, end->auth);
160 DBG2(DBG_CFG, " %sauth2=%s", label, end->auth2);
161 DBG2(DBG_CFG, " %sid=%s", label, end->id);
162 DBG2(DBG_CFG, " %sid2=%s", label, end->id2);
163 DBG2(DBG_CFG, " %scert=%s", label, end->cert);
164 DBG2(DBG_CFG, " %scert2=%s", label, end->cert2);
165 DBG2(DBG_CFG, " %sca=%s", label, end->ca);
166 DBG2(DBG_CFG, " %sca2=%s", label, end->ca2);
167 DBG2(DBG_CFG, " %sgroups=%s", label, end->groups);
168 DBG2(DBG_CFG, " %supdown=%s", label, end->updown);
169 }
170
171 /**
172 * Add a connection to the configuration list
173 */
174 static void stroke_add_conn(private_stroke_socket_t *this, stroke_msg_t *msg)
175 {
176 pop_string(msg, &msg->add_conn.name);
177 DBG1(DBG_CFG, "received stroke: add connection '%s'", msg->add_conn.name);
178
179 DBG2(DBG_CFG, "conn %s", msg->add_conn.name);
180 pop_end(msg, "left", &msg->add_conn.me);
181 pop_end(msg, "right", &msg->add_conn.other);
182 pop_string(msg, &msg->add_conn.eap_identity);
183 pop_string(msg, &msg->add_conn.algorithms.ike);
184 pop_string(msg, &msg->add_conn.algorithms.esp);
185 pop_string(msg, &msg->add_conn.ikeme.mediated_by);
186 pop_string(msg, &msg->add_conn.ikeme.peerid);
187 DBG2(DBG_CFG, " eap_identity=%s", msg->add_conn.eap_identity);
188 DBG2(DBG_CFG, " ike=%s", msg->add_conn.algorithms.ike);
189 DBG2(DBG_CFG, " esp=%s", msg->add_conn.algorithms.esp);
190 DBG2(DBG_CFG, " mediation=%s", msg->add_conn.ikeme.mediation ? "yes" : "no");
191 DBG2(DBG_CFG, " mediated_by=%s", msg->add_conn.ikeme.mediated_by);
192 DBG2(DBG_CFG, " me_peerid=%s", msg->add_conn.ikeme.peerid);
193
194 this->config->add(this->config, msg);
195 this->attribute->add_pool(this->attribute, msg);
196 }
197
198 /**
199 * Delete a connection from the list
200 */
201 static void stroke_del_conn(private_stroke_socket_t *this, stroke_msg_t *msg)
202 {
203 pop_string(msg, &msg->del_conn.name);
204 DBG1(DBG_CFG, "received stroke: delete connection '%s'", msg->del_conn.name);
205
206 this->config->del(this->config, msg);
207 this->attribute->del_pool(this->attribute, msg);
208 }
209
210 /**
211 * initiate a connection by name
212 */
213 static void stroke_initiate(private_stroke_socket_t *this, stroke_msg_t *msg, FILE *out)
214 {
215 pop_string(msg, &msg->initiate.name);
216 DBG1(DBG_CFG, "received stroke: initiate '%s'", msg->initiate.name);
217
218 this->control->initiate(this->control, msg, out);
219 }
220
221 /**
222 * terminate a connection by name
223 */
224 static void stroke_terminate(private_stroke_socket_t *this, stroke_msg_t *msg, FILE *out)
225 {
226 pop_string(msg, &msg->terminate.name);
227 DBG1(DBG_CFG, "received stroke: terminate '%s'", msg->terminate.name);
228
229 this->control->terminate(this->control, msg, out);
230 }
231
232 /**
233 * terminate a connection by peers virtual IP
234 */
235 static void stroke_terminate_srcip(private_stroke_socket_t *this,
236 stroke_msg_t *msg, FILE *out)
237 {
238 pop_string(msg, &msg->terminate_srcip.start);
239 pop_string(msg, &msg->terminate_srcip.end);
240 DBG1(DBG_CFG, "received stroke: terminate-srcip %s-%s",
241 msg->terminate_srcip.start, msg->terminate_srcip.end);
242
243 this->control->terminate_srcip(this->control, msg, out);
244 }
245
246 /**
247 * route a policy (install SPD entries)
248 */
249 static void stroke_route(private_stroke_socket_t *this, stroke_msg_t *msg, FILE *out)
250 {
251 pop_string(msg, &msg->route.name);
252 DBG1(DBG_CFG, "received stroke: route '%s'", msg->route.name);
253
254 this->control->route(this->control, msg, out);
255 }
256
257 /**
258 * unroute a policy
259 */
260 static void stroke_unroute(private_stroke_socket_t *this, stroke_msg_t *msg, FILE *out)
261 {
262 pop_string(msg, &msg->terminate.name);
263 DBG1(DBG_CFG, "received stroke: unroute '%s'", msg->route.name);
264
265 this->control->unroute(this->control, msg, out);
266 }
267
268 /**
269 * Add a ca information record to the cainfo list
270 */
271 static void stroke_add_ca(private_stroke_socket_t *this,
272 stroke_msg_t *msg, FILE *out)
273 {
274 pop_string(msg, &msg->add_ca.name);
275 DBG1(DBG_CFG, "received stroke: add ca '%s'", msg->add_ca.name);
276
277 pop_string(msg, &msg->add_ca.cacert);
278 pop_string(msg, &msg->add_ca.crluri);
279 pop_string(msg, &msg->add_ca.crluri2);
280 pop_string(msg, &msg->add_ca.ocspuri);
281 pop_string(msg, &msg->add_ca.ocspuri2);
282 pop_string(msg, &msg->add_ca.certuribase);
283 DBG2(DBG_CFG, "ca %s", msg->add_ca.name);
284 DBG2(DBG_CFG, " cacert=%s", msg->add_ca.cacert);
285 DBG2(DBG_CFG, " crluri=%s", msg->add_ca.crluri);
286 DBG2(DBG_CFG, " crluri2=%s", msg->add_ca.crluri2);
287 DBG2(DBG_CFG, " ocspuri=%s", msg->add_ca.ocspuri);
288 DBG2(DBG_CFG, " ocspuri2=%s", msg->add_ca.ocspuri2);
289 DBG2(DBG_CFG, " certuribase=%s", msg->add_ca.certuribase);
290
291 this->ca->add(this->ca, msg);
292 }
293
294 /**
295 * Delete a ca information record from the cainfo list
296 */
297 static void stroke_del_ca(private_stroke_socket_t *this,
298 stroke_msg_t *msg, FILE *out)
299 {
300 pop_string(msg, &msg->del_ca.name);
301 DBG1(DBG_CFG, "received stroke: delete ca '%s'", msg->del_ca.name);
302
303 this->ca->del(this->ca, msg);
304 }
305
306
307 /**
308 * show status of daemon
309 */
310 static void stroke_status(private_stroke_socket_t *this,
311 stroke_msg_t *msg, FILE *out, bool all)
312 {
313 pop_string(msg, &(msg->status.name));
314
315 this->list->status(this->list, msg, out, all);
316 }
317
318 /**
319 * list various information
320 */
321 static void stroke_list(private_stroke_socket_t *this, stroke_msg_t *msg, FILE *out)
322 {
323 if (msg->list.flags & LIST_CAINFOS)
324 {
325 this->ca->list(this->ca, msg, out);
326 }
327 this->list->list(this->list, msg, out);
328 }
329
330 /**
331 * reread various information
332 */
333 static void stroke_reread(private_stroke_socket_t *this,
334 stroke_msg_t *msg, FILE *out)
335 {
336 this->cred->reread(this->cred, msg);
337 }
338
339 /**
340 * purge various information
341 */
342 static void stroke_purge(private_stroke_socket_t *this,
343 stroke_msg_t *msg, FILE *out)
344 {
345 if (msg->purge.flags & PURGE_OCSP)
346 {
347 charon->credentials->flush_cache(charon->credentials,
348 CERT_X509_OCSP_RESPONSE);
349 }
350 if (msg->purge.flags & PURGE_IKE)
351 {
352 this->control->purge_ike(this->control, msg, out);
353 }
354 }
355
356 /**
357 * list pool leases
358 */
359 static void stroke_leases(private_stroke_socket_t *this,
360 stroke_msg_t *msg, FILE *out)
361 {
362 pop_string(msg, &msg->leases.pool);
363 pop_string(msg, &msg->leases.address);
364
365 this->list->leases(this->list, msg, out);
366 }
367
368 debug_t get_group_from_name(char *type)
369 {
370 if (strcaseeq(type, "any")) return DBG_ANY;
371 else if (strcaseeq(type, "mgr")) return DBG_MGR;
372 else if (strcaseeq(type, "ike")) return DBG_IKE;
373 else if (strcaseeq(type, "chd")) return DBG_CHD;
374 else if (strcaseeq(type, "job")) return DBG_JOB;
375 else if (strcaseeq(type, "cfg")) return DBG_CFG;
376 else if (strcaseeq(type, "knl")) return DBG_KNL;
377 else if (strcaseeq(type, "net")) return DBG_NET;
378 else if (strcaseeq(type, "enc")) return DBG_ENC;
379 else if (strcaseeq(type, "lib")) return DBG_LIB;
380 else return -1;
381 }
382
383 /**
384 * set the verbosity debug output
385 */
386 static void stroke_loglevel(private_stroke_socket_t *this,
387 stroke_msg_t *msg, FILE *out)
388 {
389 enumerator_t *enumerator;
390 sys_logger_t *sys_logger;
391 file_logger_t *file_logger;
392 debug_t group;
393
394 pop_string(msg, &(msg->loglevel.type));
395 DBG1(DBG_CFG, "received stroke: loglevel %d for %s",
396 msg->loglevel.level, msg->loglevel.type);
397
398 group = get_group_from_name(msg->loglevel.type);
399 if (group < 0)
400 {
401 fprintf(out, "invalid type (%s)!\n", msg->loglevel.type);
402 return;
403 }
404 /* we set the loglevel on ALL sys- and file-loggers */
405 enumerator = charon->sys_loggers->create_enumerator(charon->sys_loggers);
406 while (enumerator->enumerate(enumerator, &sys_logger))
407 {
408 sys_logger->set_level(sys_logger, group, msg->loglevel.level);
409 }
410 enumerator->destroy(enumerator);
411 enumerator = charon->file_loggers->create_enumerator(charon->file_loggers);
412 while (enumerator->enumerate(enumerator, &file_logger))
413 {
414 file_logger->set_level(file_logger, group, msg->loglevel.level);
415 }
416 enumerator->destroy(enumerator);
417 }
418
419 /**
420 * set various config options
421 */
422 static void stroke_config(private_stroke_socket_t *this,
423 stroke_msg_t *msg, FILE *out)
424 {
425 this->cred->cachecrl(this->cred, msg->config.cachecrl);
426 }
427
428 /**
429 * destroy a job context
430 */
431 static void stroke_job_context_destroy(stroke_job_context_t *this)
432 {
433 if (this->fd)
434 {
435 close(this->fd);
436 }
437 free(this);
438 }
439
440 /**
441 * process a stroke request from the socket pointed by "fd"
442 */
443 static job_requeue_t process(stroke_job_context_t *ctx)
444 {
445 stroke_msg_t *msg;
446 u_int16_t msg_length;
447 ssize_t bytes_read;
448 FILE *out;
449 private_stroke_socket_t *this = ctx->this;
450 int strokefd = ctx->fd;
451
452 /* peek the length */
453 bytes_read = recv(strokefd, &msg_length, sizeof(msg_length), MSG_PEEK);
454 if (bytes_read != sizeof(msg_length))
455 {
456 DBG1(DBG_CFG, "reading length of stroke message failed: %s",
457 strerror(errno));
458 return JOB_REQUEUE_NONE;
459 }
460
461 /* read message */
462 msg = alloca(msg_length);
463 bytes_read = recv(strokefd, msg, msg_length, 0);
464 if (bytes_read != msg_length)
465 {
466 DBG1(DBG_CFG, "reading stroke message failed: %s", strerror(errno));
467 return JOB_REQUEUE_NONE;
468 }
469
470 out = fdopen(strokefd, "w");
471 if (out == NULL)
472 {
473 DBG1(DBG_CFG, "opening stroke output channel failed: %s", strerror(errno));
474 return JOB_REQUEUE_NONE;
475 }
476
477 DBG3(DBG_CFG, "stroke message %b", (void*)msg, msg_length);
478
479 switch (msg->type)
480 {
481 case STR_INITIATE:
482 stroke_initiate(this, msg, out);
483 break;
484 case STR_ROUTE:
485 stroke_route(this, msg, out);
486 break;
487 case STR_UNROUTE:
488 stroke_unroute(this, msg, out);
489 break;
490 case STR_TERMINATE:
491 stroke_terminate(this, msg, out);
492 break;
493 case STR_TERMINATE_SRCIP:
494 stroke_terminate_srcip(this, msg, out);
495 break;
496 case STR_STATUS:
497 stroke_status(this, msg, out, FALSE);
498 break;
499 case STR_STATUS_ALL:
500 stroke_status(this, msg, out, TRUE);
501 break;
502 case STR_ADD_CONN:
503 stroke_add_conn(this, msg);
504 break;
505 case STR_DEL_CONN:
506 stroke_del_conn(this, msg);
507 break;
508 case STR_ADD_CA:
509 stroke_add_ca(this, msg, out);
510 break;
511 case STR_DEL_CA:
512 stroke_del_ca(this, msg, out);
513 break;
514 case STR_LOGLEVEL:
515 stroke_loglevel(this, msg, out);
516 break;
517 case STR_CONFIG:
518 stroke_config(this, msg, out);
519 break;
520 case STR_LIST:
521 stroke_list(this, msg, out);
522 break;
523 case STR_REREAD:
524 stroke_reread(this, msg, out);
525 break;
526 case STR_PURGE:
527 stroke_purge(this, msg, out);
528 break;
529 case STR_LEASES:
530 stroke_leases(this, msg, out);
531 break;
532 default:
533 DBG1(DBG_CFG, "received unknown stroke");
534 break;
535 }
536 fclose(out);
537 /* fclose() closes underlying FD */
538 ctx->fd = 0;
539 return JOB_REQUEUE_NONE;
540 }
541
542 /**
543 * Implementation of private_stroke_socket_t.stroke_receive.
544 */
545 static job_requeue_t receive(private_stroke_socket_t *this)
546 {
547 struct sockaddr_un strokeaddr;
548 int strokeaddrlen = sizeof(strokeaddr);
549 int strokefd;
550 int oldstate;
551 callback_job_t *job;
552 stroke_job_context_t *ctx;
553
554 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
555 strokefd = accept(this->socket, (struct sockaddr *)&strokeaddr, &strokeaddrlen);
556 pthread_setcancelstate(oldstate, NULL);
557
558 if (strokefd < 0)
559 {
560 DBG1(DBG_CFG, "accepting stroke connection failed: %s", strerror(errno));
561 return JOB_REQUEUE_FAIR;
562 }
563
564 ctx = malloc_thing(stroke_job_context_t);
565 ctx->fd = strokefd;
566 ctx->this = this;
567 job = callback_job_create((callback_job_cb_t)process,
568 ctx, (void*)stroke_job_context_destroy, this->job);
569 charon->processor->queue_job(charon->processor, (job_t*)job);
570
571 return JOB_REQUEUE_FAIR;
572 }
573
574
575 /**
576 * initialize and open stroke socket
577 */
578 static bool open_socket(private_stroke_socket_t *this)
579 {
580 struct sockaddr_un socket_addr;
581 mode_t old;
582
583 socket_addr.sun_family = AF_UNIX;
584 strcpy(socket_addr.sun_path, STROKE_SOCKET);
585
586 /* set up unix socket */
587 this->socket = socket(AF_UNIX, SOCK_STREAM, 0);
588 if (this->socket == -1)
589 {
590 DBG1(DBG_CFG, "could not create stroke socket");
591 return FALSE;
592 }
593
594 unlink(socket_addr.sun_path);
595 old = umask(~(S_IRWXU | S_IRWXG));
596 if (bind(this->socket, (struct sockaddr *)&socket_addr, sizeof(socket_addr)) < 0)
597 {
598 DBG1(DBG_CFG, "could not bind stroke socket: %s", strerror(errno));
599 close(this->socket);
600 return FALSE;
601 }
602 umask(old);
603 if (chown(socket_addr.sun_path, charon->uid, charon->gid) != 0)
604 {
605 DBG1(DBG_CFG, "changing stroke socket permissions failed: %s",
606 strerror(errno));
607 }
608
609 if (listen(this->socket, 10) < 0)
610 {
611 DBG1(DBG_CFG, "could not listen on stroke socket: %s", strerror(errno));
612 close(this->socket);
613 unlink(socket_addr.sun_path);
614 return FALSE;
615 }
616 return TRUE;
617 }
618
619 /**
620 * Implementation of stroke_socket_t.destroy
621 */
622 static void destroy(private_stroke_socket_t *this)
623 {
624 this->job->cancel(this->job);
625 charon->credentials->remove_set(charon->credentials, &this->ca->set);
626 charon->credentials->remove_set(charon->credentials, &this->cred->set);
627 charon->backends->remove_backend(charon->backends, &this->config->backend);
628 charon->attributes->remove_provider(charon->attributes, &this->attribute->provider);
629 this->cred->destroy(this->cred);
630 this->ca->destroy(this->ca);
631 this->config->destroy(this->config);
632 this->attribute->destroy(this->attribute);
633 this->control->destroy(this->control);
634 this->list->destroy(this->list);
635 free(this);
636 }
637
638 /*
639 * see header file
640 */
641 stroke_socket_t *stroke_socket_create()
642 {
643 private_stroke_socket_t *this = malloc_thing(private_stroke_socket_t);
644
645 this->public.destroy = (void(*)(stroke_socket_t*))destroy;
646
647 if (!open_socket(this))
648 {
649 free(this);
650 return NULL;
651 }
652
653 this->cred = stroke_cred_create();
654 this->attribute = stroke_attribute_create();
655 this->ca = stroke_ca_create(this->cred);
656 this->config = stroke_config_create(this->ca, this->cred);
657 this->control = stroke_control_create();
658 this->list = stroke_list_create(this->attribute);
659
660 charon->credentials->add_set(charon->credentials, &this->ca->set);
661 charon->credentials->add_set(charon->credentials, &this->cred->set);
662 charon->backends->add_backend(charon->backends, &this->config->backend);
663 charon->attributes->add_provider(charon->attributes, &this->attribute->provider);
664
665 this->job = callback_job_create((callback_job_cb_t)receive,
666 this, NULL, NULL);
667 charon->processor->queue_job(charon->processor, (job_t*)this->job);
668
669 return &this->public;
670 }
671