5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 * This is the actual SILC server than handles everything relating to
21 * servicing the SILC connections. This is also a SILC router as a router
22 * is also normal server.
26 #include "serverincludes.h"
27 #include "server_internal.h"
29 /* Static prototypes */
30 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
81 SilcIDCacheEntry cache;
90 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
91 silc_dlist_del(server->sim, sim);
94 silc_dlist_uninit(server->sim);
98 silc_server_backup_free(server);
99 silc_server_config_unref(&server->config_ref);
101 silc_rng_free(server->rng);
103 silc_pkcs_free(server->pkcs);
104 if (server->public_key)
105 silc_pkcs_public_key_free(server->public_key);
106 if (server->private_key)
107 silc_pkcs_private_key_free(server->private_key);
108 if (server->pending_commands)
109 silc_dlist_uninit(server->pending_commands);
110 if (server->id_entry)
111 silc_idlist_del_server(server->local_list, server->id_entry);
113 /* Delete all channels */
115 if (silc_idcache_get_all(server->local_list->channels, &list) &&
116 silc_idcache_list_first(list, &cache)) {
117 silc_idlist_del_channel(server->local_list, cache->context);
118 while (silc_idcache_list_next(list, &cache))
119 silc_idlist_del_channel(server->local_list, cache->context);
122 silc_idcache_list_free(list);
124 if (silc_idcache_get_all(server->global_list->channels, &list) &&
125 silc_idcache_list_first(list, &cache)) {
126 silc_idlist_del_channel(server->global_list, cache->context);
127 while (silc_idcache_list_next(list, &cache))
128 silc_idlist_del_channel(server->global_list, cache->context);
131 silc_idcache_list_free(list);
133 /* Delete all clients */
135 if (silc_idcache_get_all(server->local_list->clients, &list) &&
136 silc_idcache_list_first(list, &cache)) {
137 silc_idlist_del_client(server->local_list, cache->context);
138 while (silc_idcache_list_next(list, &cache))
139 silc_idlist_del_client(server->local_list, cache->context);
142 silc_idcache_list_free(list);
144 if (silc_idcache_get_all(server->global_list->clients, &list) &&
145 silc_idcache_list_first(list, &cache)) {
146 silc_idlist_del_client(server->global_list, cache->context);
147 while (silc_idcache_list_next(list, &cache))
148 silc_idlist_del_client(server->global_list, cache->context);
151 silc_idcache_list_free(list);
153 /* Delete all servers */
155 if (silc_idcache_get_all(server->local_list->servers, &list) &&
156 silc_idcache_list_first(list, &cache)) {
157 silc_idlist_del_server(server->local_list, cache->context);
158 while (silc_idcache_list_next(list, &cache))
159 silc_idlist_del_server(server->local_list, cache->context);
162 silc_idcache_list_free(list);
164 if (silc_idcache_get_all(server->global_list->servers, &list) &&
165 silc_idcache_list_first(list, &cache)) {
166 silc_idlist_del_server(server->global_list, cache->context);
167 while (silc_idcache_list_next(list, &cache))
168 silc_idlist_del_server(server->global_list, cache->context);
171 silc_idcache_list_free(list);
173 silc_idcache_free(server->local_list->clients);
174 silc_idcache_free(server->local_list->servers);
175 silc_idcache_free(server->local_list->channels);
176 silc_idcache_free(server->global_list->clients);
177 silc_idcache_free(server->global_list->servers);
178 silc_idcache_free(server->global_list->channels);
179 silc_hash_table_free(server->watcher_list);
181 silc_hash_free(server->md5hash);
182 silc_hash_free(server->sha1hash);
183 silc_hmac_unregister_all();
184 silc_hash_unregister_all();
185 silc_cipher_unregister_all();
186 silc_pkcs_unregister_all();
188 silc_free(server->local_list);
189 silc_free(server->global_list);
190 silc_free(server->server_name);
191 silc_free(server->id_string);
192 silc_free(server->purge_i);
193 silc_free(server->purge_g);
197 /* Creates a new server listener. */
199 static bool silc_server_listen(SilcServer server, const char *server_ip,
200 SilcUInt16 port, int *sock)
202 *sock = silc_net_create_server(port, server_ip);
204 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
211 /* Adds a secondary listener. */
213 bool silc_server_init_secondary(SilcServer server)
215 int sock = 0, sock_list[server->config->param.connections_max];
216 SilcSocketConnection newsocket = NULL;
217 SilcServerConfigServerInfoInterface *interface;
219 for (interface = server->config->server_info->secondary; interface;
220 interface = interface->next, sock++) {
222 if (!silc_server_listen(server,
223 interface->server_ip, interface->port, &sock_list[sock]))
226 /* Set socket to non-blocking mode */
227 silc_net_set_socket_nonblock(sock_list[sock]);
229 /* Add ourselves also to the socket table. The entry allocated above
230 is sent as argument for fast referencing in the future. */
231 silc_socket_alloc(sock_list[sock],
232 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
233 server->sockets[sock_list[sock]] = newsocket;
234 SILC_SET_LISTENER(newsocket);
236 /* Perform name and address lookups to resolve the listenning address
238 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
240 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
242 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
243 newsocket->hostname ? newsocket->hostname :
244 newsocket->ip ? newsocket->ip : ""));
245 server->stat.conn_failures++;
248 if (!newsocket->hostname)
249 newsocket->hostname = strdup(newsocket->ip);
251 newsocket->port = silc_net_get_local_port(sock);
253 newsocket->user_data = (void *)server->id_entry;
254 silc_schedule_task_add(server->schedule, sock_list[sock],
255 silc_server_accept_new_connection,
256 (void *)server, 0, 0,
258 SILC_TASK_PRI_NORMAL);
264 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
268 /* Initializes the entire SILC server. This is called always before running
269 the server. This is called only once at the initialization of the program.
270 This binds the server to its listenning port. After this function returns
271 one should call silc_server_run to start the server. This returns TRUE
272 when everything is ok to run the server. Configuration file must be
273 read and parsed before calling this. */
275 bool silc_server_init(SilcServer server)
279 SilcServerEntry id_entry;
280 SilcIDListPurge purge;
281 SilcSocketConnection newsocket = NULL;
283 SILC_LOG_DEBUG(("Initializing server"));
285 server->starttime = time(NULL);
287 /* Take config object for us */
288 silc_server_config_ref(&server->config_ref, server->config,
291 /* Steal public and private key from the config object */
292 server->public_key = server->config->server_info->public_key;
293 server->private_key = server->config->server_info->private_key;
294 server->config->server_info->public_key = NULL;
295 server->config->server_info->private_key = NULL;
297 /* Register all configured ciphers, PKCS and hash functions. */
298 if (!silc_server_config_register_ciphers(server))
299 silc_cipher_register_default();
300 if (!silc_server_config_register_pkcs(server))
301 silc_pkcs_register_default();
302 if (!silc_server_config_register_hashfuncs(server))
303 silc_hash_register_default();
304 if (!silc_server_config_register_hmacs(server))
305 silc_hmac_register_default();
307 /* Initialize random number generator for the server. */
308 server->rng = silc_rng_alloc();
309 silc_rng_init(server->rng);
310 silc_rng_global_init(server->rng);
312 /* Initialize hash functions for server to use */
313 silc_hash_alloc("md5", &server->md5hash);
314 silc_hash_alloc("sha1", &server->sha1hash);
316 /* Allocate PKCS context for local public and private keys */
317 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
319 silc_pkcs_public_key_set(server->pkcs, server->public_key);
320 silc_pkcs_private_key_set(server->pkcs, server->private_key);
322 /* Initialize the scheduler */
323 server->schedule = silc_schedule_init(server->config->param.connections_max,
325 if (!server->schedule)
328 /* First, register log files configuration for error output */
329 silc_server_config_setlogfiles(server);
331 /* Initialize ID caches */
332 server->local_list->clients =
333 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
334 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
335 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
337 /* These are allocated for normal server as well as these hold some
338 global information that the server has fetched from its router. For
339 router these are used as they are supposed to be used on router. */
340 server->global_list->clients =
341 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
342 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
343 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
345 /* Init watcher list */
346 server->watcher_list =
347 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
348 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
350 if (!server->watcher_list)
353 /* Create a listening server */
354 if (!silc_server_listen(server,
355 server->config->server_info->primary == NULL ? NULL :
356 server->config->server_info->primary->server_ip,
357 server->config->server_info->primary == NULL ? 0 :
358 server->config->server_info->primary->port,
362 /* Set socket to non-blocking mode */
363 silc_net_set_socket_nonblock(sock);
366 /* Allocate the entire socket list that is used in server. Eventually
367 all connections will have entry in this table (it is a table of
368 pointers to the actual object that is allocated individually
370 server->sockets = silc_calloc(server->config->param.connections_max,
371 sizeof(*server->sockets));
372 if (!server->sockets)
375 /* Add ourselves also to the socket table. The entry allocated above
376 is sent as argument for fast referencing in the future. */
377 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
378 server->sockets[sock] = newsocket;
379 SILC_SET_LISTENER(newsocket);
381 /* Perform name and address lookups to resolve the listenning address
383 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
385 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
387 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
388 newsocket->hostname ? newsocket->hostname :
389 newsocket->ip ? newsocket->ip : ""));
390 server->stat.conn_failures++;
393 if (!newsocket->hostname)
394 newsocket->hostname = strdup(newsocket->ip);
396 newsocket->port = silc_net_get_local_port(sock);
398 /* Create a Server ID for the server. */
399 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
404 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
405 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
406 server->server_name = server->config->server_info->server_name;
407 server->config->server_info->server_name = NULL;
409 /* Add ourselves to the server list. We don't have a router yet
410 beacuse we haven't established a route yet. It will be done later.
411 For now, NULL is sent as router. This allocates new entry to
414 silc_idlist_add_server(server->local_list, strdup(server->server_name),
415 server->server_type, server->id, NULL, NULL);
417 SILC_LOG_ERROR(("Could not add ourselves to cache"));
420 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
422 /* Put the allocated socket pointer also to the entry allocated above
423 for fast back-referencing to the socket list. */
424 newsocket->user_data = (void *)id_entry;
425 id_entry->connection = (void *)newsocket;
426 server->id_entry = id_entry;
428 /* Register protocols */
429 silc_server_protocols_register();
431 /* Add the first task to the scheduler. This is task that is executed by
432 timeout. It expires as soon as the caller calls silc_server_run. This
433 task performs authentication protocol and key exchange with our
435 silc_schedule_task_add(server->schedule, 0,
436 silc_server_connect_to_router,
437 (void *)server, 0, 1,
439 SILC_TASK_PRI_NORMAL);
441 /* Add listener task to the scheduler. This task receives new connections
442 to the server. This task remains on the queue until the end of the
444 silc_schedule_task_add(server->schedule, sock,
445 silc_server_accept_new_connection,
446 (void *)server, 0, 0,
448 SILC_TASK_PRI_NORMAL);
450 if (silc_server_init_secondary(server) == FALSE)
453 server->listenning = TRUE;
455 /* If server connections has been configured then we must be router as
456 normal server cannot have server connections, only router connections. */
457 if (server->config->servers) {
458 SilcServerConfigServer *ptr = server->config->servers;
460 server->server_type = SILC_ROUTER;
462 if (ptr->backup_router) {
463 server->server_type = SILC_BACKUP_ROUTER;
464 server->backup_router = TRUE;
465 server->id_entry->server_type = SILC_BACKUP_ROUTER;
472 /* Register the ID Cache purge task. This periodically purges the ID cache
473 and removes the expired cache entries. */
475 /* Clients local list */
476 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
477 purge->cache = server->local_list->clients;
478 purge->timeout = 600;
479 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
480 (void *)purge, purge->timeout, 0,
481 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
483 /* Clients global list */
484 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
485 purge->cache = server->global_list->clients;
486 purge->timeout = 300;
487 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
488 (void *)purge, purge->timeout, 0,
489 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
491 /* If we are normal server we'll retrieve network statisticial information
492 once in a while from the router. */
493 if (server->server_type == SILC_SERVER)
494 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
495 server, 10, 0, SILC_TASK_TIMEOUT,
498 if (server->server_type == SILC_ROUTER)
499 server->stat.routers++;
501 SILC_LOG_DEBUG(("Server initialized"));
503 /* We are done here, return succesfully */
507 silc_server_config_unref(&server->config_ref);
508 silc_net_close_server(sock);
512 /* Task callback to close a socket connection after rehash */
514 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
516 SilcServer server = context;
517 SilcSocketConnection sock = server->sockets[fd];
522 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
523 sock->hostname, sock->port,
524 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
525 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
526 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
528 silc_schedule_task_del_by_context(server->schedule, sock);
529 silc_server_disconnect_remote(server, sock,
530 SILC_STATUS_ERR_BANNED_FROM_SERVER,
531 "This connection is removed from "
534 silc_server_free_sock_user_data(server, sock, NULL);
537 /* This function basically reads the config file again and switches the config
538 object pointed by the server object. After that, we have to fix various
539 things such as the server_name and the listening ports.
540 Keep in mind that we no longer have the root privileges at this point. */
542 bool silc_server_rehash(SilcServer server)
544 SilcServerConfig newconfig;
546 SILC_LOG_INFO(("Rehashing server"));
548 /* Reset the logging system */
549 silc_log_quick = TRUE;
550 silc_log_flush_all();
552 /* Start the main rehash phase (read again the config file) */
553 newconfig = silc_server_config_alloc(server->config_file);
555 SILC_LOG_ERROR(("Rehash FAILED."));
559 /* Reinit scheduler if necessary */
560 if (newconfig->param.connections_max > server->config->param.connections_max)
561 if (!silc_schedule_reinit(server->schedule,
562 newconfig->param.connections_max))
565 /* Fix the server_name field */
566 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
567 silc_free(server->server_name);
568 server->server_name = newconfig->server_info->server_name;
569 newconfig->server_info->server_name = NULL;
571 /* Update the idcache list with a fresh pointer */
572 silc_free(server->id_entry->server_name);
573 server->id_entry->server_name = strdup(server->server_name);
574 if (!silc_idcache_del_by_context(server->local_list->servers,
577 if (!silc_idcache_add(server->local_list->servers,
578 server->id_entry->server_name,
579 server->id_entry->id, server->id_entry, 0, NULL))
584 silc_server_config_setlogfiles(server);
586 /* Change new key pair if necessary */
587 if (newconfig->server_info->public_key &&
588 !silc_pkcs_public_key_compare(server->public_key,
589 newconfig->server_info->public_key)) {
590 silc_pkcs_public_key_free(server->public_key);
591 silc_pkcs_private_key_free(server->private_key);
592 server->public_key = newconfig->server_info->public_key;
593 server->private_key = newconfig->server_info->private_key;
594 newconfig->server_info->public_key = NULL;
595 newconfig->server_info->private_key = NULL;
597 /* Allocate PKCS context for local public and private keys */
598 silc_pkcs_free(server->pkcs);
599 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
601 silc_pkcs_public_key_set(server->pkcs, server->public_key);
602 silc_pkcs_private_key_set(server->pkcs, server->private_key);
605 /* Check for unconfigured server and router connections and close
606 connections that were unconfigured. */
608 if (server->config->routers) {
609 SilcServerConfigRouter *ptr;
610 SilcServerConfigRouter *newptr;
613 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
616 /* Check whether new config has this one too */
617 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
618 if (silc_string_compare(newptr->host, ptr->host) &&
619 newptr->port == ptr->port &&
620 newptr->initiator == ptr->initiator) {
626 if (!found && ptr->host) {
627 /* Remove this connection */
628 SilcSocketConnection sock;
629 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
630 ptr->host, ptr->port);
631 if (sock && !SILC_IS_LISTENER(sock))
632 silc_schedule_task_add(server->schedule, sock->sock,
633 silc_server_rehash_close_connection,
634 server, 0, 1, SILC_TASK_TIMEOUT,
635 SILC_TASK_PRI_NORMAL);
640 if (server->config->servers) {
641 SilcServerConfigServer *ptr;
642 SilcServerConfigServer *newptr;
645 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
648 /* Check whether new config has this one too */
649 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
650 if (silc_string_compare(newptr->host, ptr->host)) {
656 if (!found && ptr->host) {
657 /* Remove this connection */
658 SilcSocketConnection sock;
659 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
661 if (sock && !SILC_IS_LISTENER(sock))
662 silc_schedule_task_add(server->schedule, sock->sock,
663 silc_server_rehash_close_connection,
664 server, 0, 1, SILC_TASK_TIMEOUT,
665 SILC_TASK_PRI_NORMAL);
670 if (server->config->clients) {
671 SilcServerConfigClient *ptr;
672 SilcServerConfigClient *newptr;
675 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
678 /* Check whether new config has this one too */
679 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
680 if (silc_string_compare(newptr->host, ptr->host)) {
686 if (!found && ptr->host) {
687 /* Remove this connection */
688 SilcSocketConnection sock;
689 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
692 silc_schedule_task_add(server->schedule, sock->sock,
693 silc_server_rehash_close_connection,
694 server, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
700 /* Go through all configured routers after rehash */
701 silc_schedule_task_add(server->schedule, 0,
702 silc_server_connect_to_router,
703 (void *)server, 0, 1,
705 SILC_TASK_PRI_NORMAL);
707 /* Check whether our router status has changed */
708 if (newconfig->servers) {
709 SilcServerConfigServer *ptr = newconfig->servers;
711 server->server_type = SILC_ROUTER;
713 if (ptr->backup_router) {
714 server->server_type = SILC_BACKUP_ROUTER;
715 server->backup_router = TRUE;
716 server->id_entry->server_type = SILC_BACKUP_ROUTER;
723 /* Our old config is gone now. We'll unreference our reference made in
724 silc_server_init and then destroy it since we are destroying it
725 underneath the application (layer which called silc_server_init). */
726 silc_server_config_unref(&server->config_ref);
727 silc_server_config_destroy(server->config);
729 /* Take new config context */
730 server->config = newconfig;
731 silc_server_config_ref(&server->config_ref, server->config, server->config);
733 SILC_LOG_DEBUG(("Server rehashed"));
738 /* The heart of the server. This runs the scheduler thus runs the server.
739 When this returns the server has been stopped and the program will
742 void silc_server_run(SilcServer server)
744 SILC_LOG_INFO(("SILC Server started"));
746 /* Start the scheduler, the heart of the SILC server. When this returns
747 the program will be terminated. */
748 silc_schedule(server->schedule);
751 /* Stops the SILC server. This function is used to shutdown the server.
752 This is usually called after the scheduler has returned. After stopping
753 the server one should call silc_server_free. */
755 void silc_server_stop(SilcServer server)
757 SILC_LOG_INFO(("SILC Server shutting down"));
759 if (server->schedule) {
762 server->server_shutdown = TRUE;
764 /* Close all connections */
765 for (i = 0; i < server->config->param.connections_max; i++) {
766 if (!server->sockets[i])
768 if (!SILC_IS_LISTENER(server->sockets[i])) {
769 SilcSocketConnection sock = server->sockets[i];
770 SilcIDListData idata = sock->user_data;
773 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
775 silc_schedule_task_del_by_context(server->schedule,
777 silc_server_disconnect_remote(server, server->sockets[i],
779 "Server is shutting down");
781 silc_server_free_sock_user_data(server, sock,
782 "Server is shutting down");
783 silc_socket_free(sock);
785 silc_socket_free(server->sockets[i]);
786 server->sockets[i] = NULL;
790 /* We are not connected to network anymore */
791 server->standalone = TRUE;
793 silc_schedule_stop(server->schedule);
794 silc_schedule_uninit(server->schedule);
795 server->schedule = NULL;
797 silc_free(server->sockets);
798 server->sockets = NULL;
801 silc_server_protocols_unregister();
803 SILC_LOG_DEBUG(("Server stopped"));
806 /* Function that is called when the network connection to a router has
807 been established. This will continue with the key exchange protocol
808 with the remote router. */
810 void silc_server_start_key_exchange(SilcServer server,
811 SilcServerConnection sconn,
814 SilcSocketConnection newsocket;
815 SilcProtocol protocol;
816 SilcServerKEInternalContext *proto_ctx;
817 SilcServerConfigRouter *conn =
818 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
821 /* Cancel any possible retry timeouts */
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Set socket options */
826 silc_net_set_socket_nonblock(sock);
827 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
829 /* Create socket connection for the connection. Even though we
830 know that we are connecting to a router we will mark the socket
831 to be unknown connection until we have executed authentication
833 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
834 server->sockets[sock] = newsocket;
835 newsocket->hostname = strdup(sconn->remote_host);
836 newsocket->ip = strdup(sconn->remote_host);
837 newsocket->port = sconn->remote_port;
838 sconn->sock = newsocket;
840 /* Allocate internal protocol context. This is sent as context
842 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
843 proto_ctx->server = (void *)server;
844 proto_ctx->context = (void *)sconn;
845 proto_ctx->sock = newsocket;
846 proto_ctx->rng = server->rng;
847 proto_ctx->responder = FALSE;
849 /* Set Key Exchange flags from configuration, but fall back to global
851 SILC_GET_SKE_FLAGS(conn, proto_ctx);
852 if (server->config->param.key_exchange_pfs)
853 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
855 /* Perform key exchange protocol. silc_server_connect_to_router_second
856 will be called after the protocol is finished. */
857 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
858 &protocol, proto_ctx,
859 silc_server_connect_to_router_second);
860 newsocket->protocol = protocol;
862 /* Register a timeout task that will be executed if the protocol
863 is not executed within set limit. */
864 proto_ctx->timeout_task =
865 silc_schedule_task_add(server->schedule, sock,
866 silc_server_timeout_remote,
867 server, server->config->key_exchange_timeout, 0,
871 /* Register the connection for network input and output. This sets
872 that scheduler will listen for incoming packets for this connection
873 and sets that outgoing packets may be sent to this connection as
874 well. However, this doesn't set the scheduler for outgoing traffic,
875 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
876 later when outgoing data is available. */
877 context = (void *)server;
878 SILC_REGISTER_CONNECTION_FOR_IO(sock);
880 /* Run the protocol */
881 silc_protocol_execute(protocol, server->schedule, 0, 0);
884 /* Timeout callback that will be called to retry connecting to remote
885 router. This is used by both normal and router server. This will wait
886 before retrying the connecting. The timeout is generated by exponential
887 backoff algorithm. */
889 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
891 SilcServer server = app_context;
892 SilcServerConnection sconn = (SilcServerConnection)context;
893 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
894 SilcServerConfigConnParams *param =
895 (conn->param ? conn->param : &server->config->param);
897 /* Don't retry if we are shutting down. */
898 if (server->server_shutdown) {
899 silc_server_config_unref(&sconn->conn);
900 silc_free(sconn->remote_host);
901 silc_free(sconn->backup_replace_ip);
906 SILC_LOG_INFO(("Retrying connecting to a router"));
908 /* Calculate next timeout */
909 if (sconn->retry_count >= 1) {
910 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
911 if (sconn->retry_timeout > param->reconnect_interval_max)
912 sconn->retry_timeout = param->reconnect_interval_max;
914 sconn->retry_timeout = param->reconnect_interval;
916 sconn->retry_count++;
917 sconn->retry_timeout = sconn->retry_timeout +
918 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
920 /* If we've reached max retry count, give up. */
921 if ((sconn->retry_count > param->reconnect_count) &&
922 !param->reconnect_keep_trying) {
923 SILC_LOG_ERROR(("Could not connect to router, giving up"));
924 silc_server_config_unref(&sconn->conn);
925 silc_free(sconn->remote_host);
926 silc_free(sconn->backup_replace_ip);
931 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
932 sconn->retry_timeout));
934 /* We will lookup a fresh pointer later */
935 silc_server_config_unref(&sconn->conn);
937 /* Wait one before retrying */
938 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
939 context, sconn->retry_timeout, 0,
940 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
943 /* Generic routine to use connect to a router. */
945 SILC_TASK_CALLBACK(silc_server_connect_router)
947 SilcServer server = app_context;
948 SilcServerConnection sconn = (SilcServerConnection)context;
949 SilcServerConfigRouter *rconn;
952 /* Don't connect if we are shutting down. */
953 if (server->server_shutdown) {
954 silc_free(sconn->remote_host);
955 silc_free(sconn->backup_replace_ip);
960 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
961 (sconn->backup ? "backup router" : "router"),
962 sconn->remote_host, sconn->remote_port));
964 server->router_connect = time(NULL);
965 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
968 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
969 (sconn->backup ? "backup router" : "router"),
970 sconn->remote_host, sconn->remote_port));
971 silc_free(sconn->remote_host);
972 silc_free(sconn->backup_replace_ip);
976 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
978 /* Connect to remote host */
979 sock = silc_net_create_connection(
980 (!server->config->server_info->primary ? NULL :
981 server->config->server_info->primary->server_ip),
982 sconn->remote_port, sconn->remote_host);
984 SILC_LOG_ERROR(("Could not connect to router %s:%d",
985 sconn->remote_host, sconn->remote_port));
986 if (!sconn->no_reconnect)
987 silc_schedule_task_add(server->schedule, 0,
988 silc_server_connect_to_router_retry,
989 context, 0, 1, SILC_TASK_TIMEOUT,
990 SILC_TASK_PRI_NORMAL);
992 silc_server_config_unref(&sconn->conn);
996 /* Continue with key exchange protocol */
997 silc_server_start_key_exchange(server, sconn, sock);
1000 /* This function connects to our primary router or if we are a router this
1001 establishes all our primary routes. This is called at the start of the
1002 server to do authentication and key exchange with our router - called
1005 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1007 SilcServer server = (SilcServer)context;
1008 SilcServerConnection sconn;
1009 SilcServerConfigRouter *ptr;
1011 /* Don't connect if we are shutting down. */
1012 if (server->server_shutdown)
1015 SILC_LOG_DEBUG(("We are %s",
1016 (server->server_type == SILC_SERVER ?
1017 "normal server" : server->server_type == SILC_ROUTER ?
1018 "router" : "backup router/normal server")));
1020 if (!server->config->routers) {
1021 /* There wasn't a configured router, we will continue but we don't
1022 have a connection to outside world. We will be standalone server. */
1023 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1024 server->standalone = TRUE;
1028 /* Cancel any possible retry timeouts */
1029 silc_schedule_task_del_by_callback(server->schedule,
1030 silc_server_connect_router);
1031 silc_schedule_task_del_by_callback(server->schedule,
1032 silc_server_connect_to_router_retry);
1034 /* Create the connections to all our routes */
1035 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1037 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1038 ptr->backup_router ? "Backup router" : "Router",
1039 ptr->initiator ? "Initiator" : "Responder",
1040 ptr->host, ptr->port));
1042 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1043 ptr->initiator == FALSE && !server->backup_router &&
1044 !silc_server_config_get_backup_router(server))
1045 server->wait_backup = TRUE;
1047 if (ptr->initiator) {
1048 /* Check whether we are connected to this host already */
1049 if (silc_server_num_sockets_by_remote(server,
1050 silc_net_is_ip(ptr->host) ?
1052 silc_net_is_ip(ptr->host) ?
1053 NULL : ptr->host, ptr->port,
1054 SILC_SOCKET_TYPE_ROUTER)) {
1055 SILC_LOG_DEBUG(("We are already connected to this router"));
1059 /* Allocate connection object for hold connection specific stuff. */
1060 sconn = silc_calloc(1, sizeof(*sconn));
1061 sconn->remote_host = strdup(ptr->host);
1062 sconn->remote_port = ptr->port;
1063 sconn->backup = ptr->backup_router;
1064 if (sconn->backup) {
1065 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1066 sconn->backup_replace_port = ptr->backup_replace_port;
1069 if (!server->router_conn && !sconn->backup)
1070 server->router_conn = sconn;
1072 silc_schedule_task_add(server->schedule, 0,
1073 silc_server_connect_router,
1074 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1075 SILC_TASK_PRI_NORMAL);
1080 /* Second part of connecting to router(s). Key exchange protocol has been
1081 executed and now we will execute authentication protocol. */
1083 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1085 SilcProtocol protocol = (SilcProtocol)context;
1086 SilcServerKEInternalContext *ctx =
1087 (SilcServerKEInternalContext *)protocol->context;
1088 SilcServer server = (SilcServer)ctx->server;
1089 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1090 SilcSocketConnection sock = ctx->sock;
1091 SilcServerConnAuthInternalContext *proto_ctx;
1092 SilcServerConfigRouter *conn = NULL;
1094 SILC_LOG_DEBUG(("Start"));
1096 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1097 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1098 /* Error occured during protocol */
1099 silc_protocol_free(protocol);
1100 sock->protocol = NULL;
1101 silc_ske_free_key_material(ctx->keymat);
1103 silc_packet_context_free(ctx->packet);
1105 silc_ske_free(ctx->ske);
1106 silc_free(ctx->dest_id);
1108 silc_schedule_task_del_by_callback(server->schedule,
1109 silc_server_failure_callback);
1110 silc_server_disconnect_remote(server, sock,
1111 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1113 /* Try reconnecting if configuration wants it */
1114 if (!sconn->no_reconnect) {
1115 silc_schedule_task_add(server->schedule, 0,
1116 silc_server_connect_to_router_retry,
1117 sconn, 0, 1, SILC_TASK_TIMEOUT,
1118 SILC_TASK_PRI_NORMAL);
1122 /* Call completion to indicate error */
1123 if (sconn->callback)
1124 (*sconn->callback)(server, NULL, sconn->callback_context);
1126 silc_server_config_unref(&sconn->conn);
1127 silc_free(sconn->remote_host);
1128 silc_free(sconn->backup_replace_ip);
1133 /* We now have the key material as the result of the key exchange
1134 protocol. Take the key material into use. Free the raw key material
1135 as soon as we've set them into use. */
1136 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1137 ctx->sock, ctx->keymat,
1138 ctx->ske->prop->cipher,
1139 ctx->ske->prop->pkcs,
1140 ctx->ske->prop->hash,
1141 ctx->ske->prop->hmac,
1142 ctx->ske->prop->group,
1144 silc_protocol_free(protocol);
1145 sock->protocol = NULL;
1146 silc_ske_free_key_material(ctx->keymat);
1148 silc_packet_context_free(ctx->packet);
1150 silc_ske_free(ctx->ske);
1151 silc_free(ctx->dest_id);
1153 silc_schedule_task_del_by_callback(server->schedule,
1154 silc_server_failure_callback);
1155 silc_server_disconnect_remote(server, sock,
1156 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1158 /* Try reconnecting if configuration wants it */
1159 if (!sconn->no_reconnect) {
1160 silc_schedule_task_add(server->schedule, 0,
1161 silc_server_connect_to_router_retry,
1162 sconn, 0, 1, SILC_TASK_TIMEOUT,
1163 SILC_TASK_PRI_NORMAL);
1167 /* Call completion to indicate error */
1168 if (sconn->callback)
1169 (*sconn->callback)(server, NULL, sconn->callback_context);
1171 silc_server_config_unref(&sconn->conn);
1172 silc_free(sconn->remote_host);
1173 silc_free(sconn->backup_replace_ip);
1177 silc_ske_free_key_material(ctx->keymat);
1179 /* Allocate internal context for the authentication protocol. This
1180 is sent as context for the protocol. */
1181 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1182 proto_ctx->server = (void *)server;
1183 proto_ctx->context = (void *)sconn;
1184 proto_ctx->sock = sock;
1185 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1186 proto_ctx->dest_id_type = ctx->dest_id_type;
1187 proto_ctx->dest_id = ctx->dest_id;
1189 /* Resolve the authentication method used in this connection. Check if
1190 we find a match from user configured connections */
1191 if (!sconn->conn.ref_ptr)
1192 conn = silc_server_config_find_router_conn(server, sock->hostname,
1195 conn = sconn->conn.ref_ptr;
1198 /* Match found. Use the configured authentication method. Take only
1199 the passphrase, since for public key auth we automatically use
1200 our local key pair. */
1201 if (conn->passphrase) {
1202 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1203 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1205 proto_ctx->auth_data = strdup(conn->passphrase);
1206 proto_ctx->auth_data_len = strlen(conn->passphrase);
1207 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1209 } else if (conn->publickeys) {
1210 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1212 proto_ctx->auth_meth = SILC_AUTH_NONE;
1215 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1216 sock->hostname, sock->ip, sock->port));
1217 silc_protocol_free(protocol);
1218 sock->protocol = NULL;
1220 silc_packet_context_free(ctx->packet);
1222 silc_ske_free(ctx->ske);
1223 silc_free(ctx->dest_id);
1225 silc_server_config_unref(&sconn->conn);
1226 silc_free(sconn->remote_host);
1227 silc_free(sconn->backup_replace_ip);
1229 silc_schedule_task_del_by_callback(server->schedule,
1230 silc_server_failure_callback);
1231 silc_server_disconnect_remote(server, sock,
1232 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1236 /* Free old protocol as it is finished now */
1237 silc_protocol_free(protocol);
1239 silc_packet_context_free(ctx->packet);
1241 sock->protocol = NULL;
1243 /* Allocate the authentication protocol. This is allocated here
1244 but we won't start it yet. We will be receiving party of this
1245 protocol thus we will wait that connecting party will make
1246 their first move. */
1247 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1248 &sock->protocol, proto_ctx,
1249 silc_server_connect_to_router_final);
1251 /* Register timeout task. If the protocol is not executed inside
1252 this timelimit the connection will be terminated. */
1253 proto_ctx->timeout_task =
1254 silc_schedule_task_add(server->schedule, sock->sock,
1255 silc_server_timeout_remote,
1257 server->config->conn_auth_timeout, 0,
1261 /* Run the protocol */
1262 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1265 /* Finalizes the connection to router. Registers a server task to the
1266 queue so that we can accept new connections. */
1268 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1270 SilcProtocol protocol = (SilcProtocol)context;
1271 SilcServerConnAuthInternalContext *ctx =
1272 (SilcServerConnAuthInternalContext *)protocol->context;
1273 SilcServer server = (SilcServer)ctx->server;
1274 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1275 SilcSocketConnection sock = ctx->sock;
1276 SilcServerEntry id_entry = NULL;
1278 unsigned char *id_string;
1280 SilcIDListData idata;
1281 SilcServerConfigRouter *conn = NULL;
1282 SilcServerConfigConnParams *param = NULL;
1284 SILC_LOG_DEBUG(("Start"));
1286 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1287 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1288 /* Error occured during protocol */
1289 silc_free(ctx->dest_id);
1290 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1293 /* Try reconnecting if configuration wants it */
1294 if (!sconn->no_reconnect) {
1295 silc_schedule_task_add(server->schedule, 0,
1296 silc_server_connect_to_router_retry,
1297 sconn, 0, 1, SILC_TASK_TIMEOUT,
1298 SILC_TASK_PRI_NORMAL);
1305 /* Add a task to the queue. This task receives new connections to the
1306 server. This task remains on the queue until the end of the program. */
1307 if (!server->listenning && !sconn->backup) {
1308 silc_schedule_task_add(server->schedule, server->sock,
1309 silc_server_accept_new_connection,
1310 (void *)server, 0, 0,
1312 SILC_TASK_PRI_NORMAL);
1313 server->listenning = TRUE;
1316 /* Send NEW_SERVER packet to the router. We will become registered
1317 to the SILC network after sending this packet. */
1318 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1319 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1320 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1321 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1322 silc_buffer_format(packet,
1323 SILC_STR_UI_SHORT(id_len),
1324 SILC_STR_UI_XNSTRING(id_string, id_len),
1325 SILC_STR_UI_SHORT(strlen(server->server_name)),
1326 SILC_STR_UI_XNSTRING(server->server_name,
1327 strlen(server->server_name)),
1330 /* Send the packet */
1331 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1332 packet->data, packet->len, TRUE);
1333 silc_buffer_free(packet);
1334 silc_free(id_string);
1336 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1338 /* Check that we do not have this ID already */
1339 id_entry = silc_idlist_find_server_by_id(server->local_list,
1340 ctx->dest_id, TRUE, NULL);
1342 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1344 id_entry = silc_idlist_find_server_by_id(server->global_list,
1345 ctx->dest_id, TRUE, NULL);
1347 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1350 SILC_LOG_DEBUG(("New server id(%s)",
1351 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1353 /* Add the connected router to global server list. Router is sent
1354 as NULL since it's local to us. */
1355 id_entry = silc_idlist_add_server(server->global_list,
1356 strdup(sock->hostname),
1357 SILC_ROUTER, ctx->dest_id, NULL, sock);
1359 silc_free(ctx->dest_id);
1360 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1361 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1366 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1367 silc_free(sock->user_data);
1368 sock->user_data = (void *)id_entry;
1369 sock->type = SILC_SOCKET_TYPE_ROUTER;
1370 idata = (SilcIDListData)sock->user_data;
1371 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1372 SILC_IDLIST_STATUS_LOCAL);
1374 conn = sconn->conn.ref_ptr;
1375 param = &server->config->param;
1376 if (conn && conn->param)
1377 param = conn->param;
1379 /* Perform keepalive. The `hb_context' will be freed automatically
1380 when finally calling the silc_socket_free function. */
1381 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1382 silc_server_perform_heartbeat,
1385 /* Register re-key timeout */
1386 idata->rekey->timeout = param->key_exchange_rekey;
1387 silc_schedule_task_add(server->schedule, sock->sock,
1388 silc_server_rekey_callback,
1389 (void *)sock, idata->rekey->timeout, 0,
1390 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1392 if (!sconn->backup) {
1393 /* Mark this router our primary router if we're still standalone */
1394 if (server->standalone) {
1395 SILC_LOG_DEBUG(("This connection is our primary router"));
1396 server->id_entry->router = id_entry;
1397 server->router = id_entry;
1398 server->standalone = FALSE;
1400 /* If we are router then announce our possible servers. Backup
1401 router announces also global servers. */
1402 if (server->server_type == SILC_ROUTER)
1403 silc_server_announce_servers(server,
1404 server->backup_router ? TRUE : FALSE,
1405 0, SILC_PRIMARY_ROUTE(server));
1407 /* Announce our clients and channels to the router */
1408 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1409 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1411 /* If we are backup router then this primary router is whom we are
1413 if (server->server_type == SILC_BACKUP_ROUTER)
1414 silc_server_backup_add(server, server->id_entry, sock->ip,
1415 sconn->remote_port, TRUE);
1418 /* Add this server to be our backup router */
1419 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1420 sconn->backup_replace_port, FALSE);
1423 sock->protocol = NULL;
1426 /* Call the completion callback to indicate that we've connected to
1428 if (sconn && sconn->callback)
1429 (*sconn->callback)(server, id_entry, sconn->callback_context);
1431 /* Free the temporary connection data context */
1433 silc_server_config_unref(&sconn->conn);
1434 silc_free(sconn->remote_host);
1435 silc_free(sconn->backup_replace_ip);
1438 if (sconn == server->router_conn)
1439 server->router_conn = NULL;
1442 /* Free the protocol object */
1443 if (sock->protocol == protocol)
1444 sock->protocol = NULL;
1445 silc_protocol_free(protocol);
1447 silc_packet_context_free(ctx->packet);
1449 silc_ske_free(ctx->ske);
1450 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1451 silc_free(ctx->auth_data);
1455 /* Host lookup callback that is called after the incoming connection's
1456 IP and FQDN lookup is performed. This will actually check the acceptance
1457 of the incoming connection and will register the key exchange protocol
1458 for this connection. */
1461 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1464 SilcServerKEInternalContext *proto_ctx =
1465 (SilcServerKEInternalContext *)context;
1466 SilcServer server = (SilcServer)proto_ctx->server;
1467 SilcServerConfigClient *cconfig = NULL;
1468 SilcServerConfigServer *sconfig = NULL;
1469 SilcServerConfigRouter *rconfig = NULL;
1470 SilcServerConfigDeny *deny;
1473 /* Check whether we could resolve both IP and FQDN. */
1474 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1475 server->config->require_reverse_lookup)) {
1476 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1477 sock->hostname ? sock->hostname :
1478 sock->ip ? sock->ip : ""));
1479 server->stat.conn_failures++;
1480 silc_server_disconnect_remote(server, sock,
1481 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1482 "Unknown host or IP");
1483 silc_free(proto_ctx);
1487 /* Register the connection for network input and output. This sets
1488 that scheduler will listen for incoming packets for this connection
1489 and sets that outgoing packets may be sent to this connection as well.
1490 However, this doesn't set the scheduler for outgoing traffic, it
1491 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1492 later when outgoing data is available. */
1493 context = (void *)server;
1494 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1496 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1499 /* Listenning port */
1500 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1501 silc_server_disconnect_remote(server, sock,
1502 SILC_STATUS_ERR_RESOURCE_LIMIT,
1503 "Connection refused");
1504 server->stat.conn_failures++;
1505 silc_free(proto_ctx);
1508 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1510 /* Check whether this connection is denied to connect to us. */
1511 deny = silc_server_config_find_denied(server, sock->ip);
1513 deny = silc_server_config_find_denied(server, sock->hostname);
1515 /* The connection is denied */
1516 SILC_LOG_INFO(("Connection %s (%s) is denied",
1517 sock->hostname, sock->ip));
1518 silc_server_disconnect_remote(server, sock,
1519 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1521 server->stat.conn_failures++;
1522 silc_free(proto_ctx);
1526 /* Check whether we have configured this sort of connection at all. We
1527 have to check all configurations since we don't know what type of
1528 connection this is. */
1529 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1530 cconfig = silc_server_config_find_client(server, sock->hostname);
1531 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1532 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1533 if (server->server_type == SILC_ROUTER) {
1534 if (!(rconfig = silc_server_config_find_router_conn(server,
1535 sock->ip, sock->port)))
1536 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1539 if (!cconfig && !sconfig && !rconfig) {
1540 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1542 silc_server_disconnect_remote(server, sock,
1543 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1544 server->stat.conn_failures++;
1545 silc_free(proto_ctx);
1549 /* The connection is allowed */
1551 /* Set internal context for key exchange protocol. This is
1552 sent as context for the protocol. */
1553 proto_ctx->sock = sock;
1554 proto_ctx->rng = server->rng;
1555 proto_ctx->responder = TRUE;
1556 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1557 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1558 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1560 /* Take flags for key exchange. Since we do not know what type of connection
1561 this is, we go through all found configurations and use the global ones
1562 as well. This will result always into strictest key exchange flags. */
1563 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1564 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1565 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1566 if (server->config->param.key_exchange_pfs)
1567 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1569 /* Prepare the connection for key exchange protocol. We allocate the
1570 protocol but will not start it yet. The connector will be the
1571 initiator of the protocol thus we will wait for initiation from
1572 there before we start the protocol. */
1573 server->stat.auth_attempts++;
1574 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1575 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1576 &sock->protocol, proto_ctx,
1577 silc_server_accept_new_connection_second);
1579 /* Register a timeout task that will be executed if the connector
1580 will not start the key exchange protocol within specified timeout
1581 and the connection will be closed. */
1582 proto_ctx->timeout_task =
1583 silc_schedule_task_add(server->schedule, sock->sock,
1584 silc_server_timeout_remote,
1586 server->config->key_exchange_timeout, 0,
1591 /* Accepts new connections to the server. Accepting new connections are
1592 done in three parts to make it async. */
1594 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1596 SilcServer server = (SilcServer)context;
1597 SilcSocketConnection newsocket;
1598 SilcServerKEInternalContext *proto_ctx;
1601 SILC_LOG_DEBUG(("Accepting new connection"));
1603 server->stat.conn_attempts++;
1605 sock = silc_net_accept_connection(fd);
1607 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1608 server->stat.conn_failures++;
1612 /* Check for maximum allowed connections */
1613 if (sock > server->config->param.connections_max) {
1614 SILC_LOG_ERROR(("Refusing connection, server is full"));
1615 server->stat.conn_failures++;
1616 silc_net_close_connection(sock);
1620 /* Set socket options */
1621 silc_net_set_socket_nonblock(sock);
1622 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1624 /* We don't create a ID yet, since we don't know what type of connection
1625 this is yet. But, we do add the connection to the socket table. */
1626 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1627 server->sockets[sock] = newsocket;
1629 /* Perform asynchronous host lookup. This will lookup the IP and the
1630 FQDN of the remote connection. After the lookup is done the connection
1631 is accepted further. */
1632 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1633 proto_ctx->server = server;
1634 proto_ctx->context = (void *)fd;
1635 silc_socket_host_lookup(newsocket, TRUE,
1636 silc_server_accept_new_connection_lookup,
1637 (void *)proto_ctx, server->schedule);
1640 /* Second part of accepting new connection. Key exchange protocol has been
1641 performed and now it is time to do little connection authentication
1642 protocol to figure out whether this connection is client or server
1643 and whether it has right to access this server (especially server
1644 connections needs to be authenticated). */
1646 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1648 SilcProtocol protocol = (SilcProtocol)context;
1649 SilcServerKEInternalContext *ctx =
1650 (SilcServerKEInternalContext *)protocol->context;
1651 SilcServer server = (SilcServer)ctx->server;
1652 SilcSocketConnection sock = ctx->sock;
1653 SilcServerConnAuthInternalContext *proto_ctx;
1655 SILC_LOG_DEBUG(("Start"));
1657 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1658 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1659 /* Error occured during protocol */
1660 SILC_LOG_DEBUG(("Error key exchange protocol"));
1661 silc_protocol_free(protocol);
1662 sock->protocol = NULL;
1663 silc_ske_free_key_material(ctx->keymat);
1665 silc_packet_context_free(ctx->packet);
1667 silc_ske_free(ctx->ske);
1668 silc_free(ctx->dest_id);
1669 silc_server_config_unref(&ctx->cconfig);
1670 silc_server_config_unref(&ctx->sconfig);
1671 silc_server_config_unref(&ctx->rconfig);
1673 silc_schedule_task_del_by_callback(server->schedule,
1674 silc_server_failure_callback);
1675 silc_server_disconnect_remote(server, sock,
1676 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1678 server->stat.auth_failures++;
1682 /* We now have the key material as the result of the key exchange
1683 protocol. Take the key material into use. Free the raw key material
1684 as soon as we've set them into use. */
1685 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1686 ctx->sock, ctx->keymat,
1687 ctx->ske->prop->cipher,
1688 ctx->ske->prop->pkcs,
1689 ctx->ske->prop->hash,
1690 ctx->ske->prop->hmac,
1691 ctx->ske->prop->group,
1693 SILC_LOG_ERROR(("Error setting key material in use"));
1694 silc_protocol_free(protocol);
1695 sock->protocol = NULL;
1696 silc_ske_free_key_material(ctx->keymat);
1698 silc_packet_context_free(ctx->packet);
1700 silc_ske_free(ctx->ske);
1701 silc_free(ctx->dest_id);
1702 silc_server_config_unref(&ctx->cconfig);
1703 silc_server_config_unref(&ctx->sconfig);
1704 silc_server_config_unref(&ctx->rconfig);
1706 silc_schedule_task_del_by_callback(server->schedule,
1707 silc_server_failure_callback);
1708 silc_server_disconnect_remote(server, sock,
1709 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1710 server->stat.auth_failures++;
1713 silc_ske_free_key_material(ctx->keymat);
1715 /* Allocate internal context for the authentication protocol. This
1716 is sent as context for the protocol. */
1717 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1718 proto_ctx->server = (void *)server;
1719 proto_ctx->sock = sock;
1720 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1721 proto_ctx->responder = TRUE;
1722 proto_ctx->dest_id_type = ctx->dest_id_type;
1723 proto_ctx->dest_id = ctx->dest_id;
1724 proto_ctx->cconfig = ctx->cconfig;
1725 proto_ctx->sconfig = ctx->sconfig;
1726 proto_ctx->rconfig = ctx->rconfig;
1728 /* Free old protocol as it is finished now */
1729 silc_protocol_free(protocol);
1731 silc_packet_context_free(ctx->packet);
1733 sock->protocol = NULL;
1735 /* Allocate the authentication protocol. This is allocated here
1736 but we won't start it yet. We will be receiving party of this
1737 protocol thus we will wait that connecting party will make
1738 their first move. */
1739 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1740 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1741 &sock->protocol, proto_ctx,
1742 silc_server_accept_new_connection_final);
1744 /* Register timeout task. If the protocol is not executed inside
1745 this timelimit the connection will be terminated. */
1746 proto_ctx->timeout_task =
1747 silc_schedule_task_add(server->schedule, sock->sock,
1748 silc_server_timeout_remote,
1750 server->config->conn_auth_timeout, 0,
1755 /* After this is called, server don't wait for backup router anymore.
1756 This gets called automatically even after we have backup router
1757 connection established. */
1759 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1761 SilcServer server = context;
1762 server->wait_backup = FALSE;
1765 /* Final part of accepting new connection. The connection has now
1766 been authenticated and keys has been exchanged. We also know whether
1767 this is client or server connection. */
1769 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1771 SilcProtocol protocol = (SilcProtocol)context;
1772 SilcServerConnAuthInternalContext *ctx =
1773 (SilcServerConnAuthInternalContext *)protocol->context;
1774 SilcServer server = (SilcServer)ctx->server;
1775 SilcSocketConnection sock = ctx->sock;
1776 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1778 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1780 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1781 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1782 /* Error occured during protocol */
1783 SILC_LOG_DEBUG(("Error during authentication protocol"));
1784 silc_protocol_free(protocol);
1785 sock->protocol = NULL;
1787 silc_packet_context_free(ctx->packet);
1789 silc_ske_free(ctx->ske);
1790 silc_free(ctx->dest_id);
1791 silc_server_config_unref(&ctx->cconfig);
1792 silc_server_config_unref(&ctx->sconfig);
1793 silc_server_config_unref(&ctx->rconfig);
1795 silc_schedule_task_del_by_callback(server->schedule,
1796 silc_server_failure_callback);
1797 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1799 server->stat.auth_failures++;
1803 entry->data.last_receive = time(NULL);
1805 switch (ctx->conn_type) {
1806 case SILC_SOCKET_TYPE_CLIENT:
1808 SilcClientEntry client;
1809 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1811 /* Verify whether this connection is after all allowed to connect */
1812 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1813 &server->config->param,
1814 conn->param, ctx->ske)) {
1815 server->stat.auth_failures++;
1819 /* If we are primary router and we have backup router configured
1820 but it has not connected to use yet, do not accept any other
1822 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1823 !server->backup_router) {
1824 SilcServerConfigRouter *router;
1825 router = silc_server_config_get_backup_router(server);
1826 if (router && strcmp(server->config->server_info->primary->server_ip,
1828 silc_server_find_socket_by_host(server,
1829 SILC_SOCKET_TYPE_SERVER,
1830 router->backup_replace_ip, 0)) {
1831 SILC_LOG_INFO(("Will not accept connections because we do "
1832 "not have backup router connection established"));
1833 silc_server_disconnect_remote(server, sock,
1834 SILC_STATUS_ERR_PERM_DENIED,
1835 "We do not have connection to backup "
1836 "router established, try later");
1837 silc_free(sock->user_data);
1838 server->stat.auth_failures++;
1840 /* From here on, wait 10 seconds for the backup router to appear. */
1841 silc_schedule_task_add(server->schedule, 0,
1842 silc_server_backup_router_wait,
1843 (void *)server, 10, 0,
1844 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1849 SILC_LOG_DEBUG(("Remote host is client"));
1850 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1853 /* Add the client to the client ID cache. The nickname and Client ID
1854 and other information is created after we have received NEW_CLIENT
1855 packet from client. */
1856 client = silc_idlist_add_client(server->local_list,
1857 NULL, NULL, NULL, NULL, NULL, sock, 0);
1859 SILC_LOG_ERROR(("Could not add new client to cache"));
1860 silc_free(sock->user_data);
1861 silc_server_disconnect_remote(server, sock,
1862 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1863 server->stat.auth_failures++;
1866 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1869 server->stat.my_clients++;
1870 server->stat.clients++;
1871 server->stat.cell_clients++;
1873 /* Get connection parameters */
1875 if (conn->param->keepalive_secs)
1876 hearbeat_timeout = conn->param->keepalive_secs;
1878 /* Check if to be anonymous connection */
1879 if (conn->param->anonymous)
1880 client->mode |= SILC_UMODE_ANONYMOUS;
1883 id_entry = (void *)client;
1886 case SILC_SOCKET_TYPE_SERVER:
1887 case SILC_SOCKET_TYPE_ROUTER:
1889 SilcServerEntry new_server;
1890 bool initiator = FALSE;
1891 bool backup_local = FALSE;
1892 bool backup_router = FALSE;
1893 char *backup_replace_ip = NULL;
1894 SilcUInt16 backup_replace_port = 0;
1895 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1896 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1898 /* If we are backup router and this is incoming server connection
1899 and we do not have connection to primary router, do not allow
1901 if (server->server_type == SILC_BACKUP_ROUTER &&
1902 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1903 !SILC_PRIMARY_ROUTE(server)) {
1904 SILC_LOG_INFO(("Will not accept server connection because we do "
1905 "not have primary router connection established"));
1906 silc_server_disconnect_remote(server, sock,
1907 SILC_STATUS_ERR_PERM_DENIED,
1908 "We do not have connection to primary "
1909 "router established, try later");
1910 silc_free(sock->user_data);
1911 server->stat.auth_failures++;
1915 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1916 /* Verify whether this connection is after all allowed to connect */
1917 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1918 &server->config->param,
1919 rconn ? rconn->param : NULL,
1921 silc_free(sock->user_data);
1922 server->stat.auth_failures++;
1928 if (rconn->param->keepalive_secs)
1929 hearbeat_timeout = rconn->param->keepalive_secs;
1932 initiator = rconn->initiator;
1933 backup_local = rconn->backup_local;
1934 backup_router = rconn->backup_router;
1935 backup_replace_ip = rconn->backup_replace_ip;
1936 backup_replace_port = rconn->backup_replace_port;
1940 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1941 /* Verify whether this connection is after all allowed to connect */
1942 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1943 &server->config->param,
1944 sconn ? sconn->param : NULL,
1946 silc_free(sock->user_data);
1947 server->stat.auth_failures++;
1952 if (sconn->param->keepalive_secs)
1953 hearbeat_timeout = sconn->param->keepalive_secs;
1956 backup_router = sconn->backup_router;
1960 /* If we are primary router and we have backup router configured
1961 but it has not connected to use yet, do not accept any other
1963 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1964 !server->backup_router && !backup_router) {
1965 SilcServerConfigRouter *router;
1966 router = silc_server_config_get_backup_router(server);
1967 if (router && strcmp(server->config->server_info->primary->server_ip,
1969 silc_server_find_socket_by_host(server,
1970 SILC_SOCKET_TYPE_SERVER,
1971 router->backup_replace_ip, 0)) {
1972 SILC_LOG_INFO(("Will not accept connections because we do "
1973 "not have backup router connection established"));
1974 silc_server_disconnect_remote(server, sock,
1975 SILC_STATUS_ERR_PERM_DENIED,
1976 "We do not have connection to backup "
1977 "router established, try later");
1978 silc_free(sock->user_data);
1979 server->stat.auth_failures++;
1981 /* From here on, wait 10 seconds for the backup router to appear. */
1982 silc_schedule_task_add(server->schedule, 0,
1983 silc_server_backup_router_wait,
1984 (void *)server, 10, 0,
1985 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1990 SILC_LOG_DEBUG(("Remote host is %s",
1991 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1992 "server" : (backup_router ?
1993 "backup router" : "router")));
1994 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1995 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1996 "server" : (backup_router ?
1997 "backup router" : "router")));
1999 /* Add the server into server cache. The server name and Server ID
2000 is updated after we have received NEW_SERVER packet from the
2001 server. We mark ourselves as router for this server if we really
2004 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2005 server->local_list : (backup_router ?
2006 server->local_list :
2007 server->global_list)),
2009 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2010 SILC_SERVER : SILC_ROUTER),
2012 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2013 server->id_entry : (backup_router ?
2014 server->id_entry : NULL)),
2017 SILC_LOG_ERROR(("Could not add new server to cache"));
2018 silc_free(sock->user_data);
2019 silc_server_disconnect_remote(server, sock,
2020 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2021 server->stat.auth_failures++;
2024 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2026 id_entry = (void *)new_server;
2028 /* If the incoming connection is router and marked as backup router
2029 then add it to be one of our backups */
2030 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2031 /* Change it back to SERVER type since that's what it really is. */
2033 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2034 new_server->server_type = SILC_BACKUP_ROUTER;
2036 /* Remove the backup waiting with timeout */
2037 silc_schedule_task_add(server->schedule, 0,
2038 silc_server_backup_router_wait,
2039 (void *)server, 5, 0,
2040 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2044 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2045 server->stat.my_servers++;
2047 server->stat.my_routers++;
2048 server->stat.routers++;
2050 server->stat.servers++;
2052 /* Check whether this connection is to be our primary router connection
2053 if we do not already have the primary route. */
2054 if (!backup_router &&
2055 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2056 if (silc_server_config_is_primary_route(server) && !initiator)
2059 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2060 server->standalone = FALSE;
2061 if (!server->id_entry->router) {
2062 server->id_entry->router = id_entry;
2063 server->router = id_entry;
2074 sock->type = ctx->conn_type;
2076 /* Add the common data structure to the ID entry. */
2077 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2079 /* Add to sockets internal pointer for fast referencing */
2080 silc_free(sock->user_data);
2081 sock->user_data = id_entry;
2083 /* Connection has been fully established now. Everything is ok. */
2084 SILC_LOG_DEBUG(("New connection authenticated"));
2086 /* Perform keepalive. The `hb_context' will be freed automatically
2087 when finally calling the silc_socket_free function. */
2088 silc_socket_set_heartbeat(sock, hearbeat_timeout, server,
2089 silc_server_perform_heartbeat,
2093 silc_schedule_task_del_by_callback(server->schedule,
2094 silc_server_failure_callback);
2095 silc_protocol_free(protocol);
2097 silc_packet_context_free(ctx->packet);
2099 silc_ske_free(ctx->ske);
2100 silc_free(ctx->dest_id);
2101 silc_server_config_unref(&ctx->cconfig);
2102 silc_server_config_unref(&ctx->sconfig);
2103 silc_server_config_unref(&ctx->rconfig);
2105 sock->protocol = NULL;
2108 /* This function is used to read packets from network and send packets to
2109 network. This is usually a generic task. */
2111 SILC_TASK_CALLBACK(silc_server_packet_process)
2113 SilcServer server = (SilcServer)context;
2114 SilcSocketConnection sock = server->sockets[fd];
2115 SilcIDListData idata;
2116 SilcCipher cipher = NULL;
2117 SilcHmac hmac = NULL;
2118 SilcUInt32 sequence = 0;
2122 SILC_LOG_DEBUG(("Unknown socket connection"));
2126 /* Packet sending */
2128 if (type == SILC_TASK_WRITE) {
2129 /* Do not send data to disconnected connection */
2130 if (SILC_IS_DISCONNECTED(sock)) {
2131 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2135 server->stat.packets_sent++;
2137 /* Send the packet */
2138 ret = silc_packet_send(sock, TRUE);
2140 /* If returned -2 could not write to connection now, will do
2146 SILC_LOG_ERROR(("Error sending packet to connection "
2147 "%s:%d [%s]", sock->hostname, sock->port,
2148 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2149 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2150 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2155 /* The packet has been sent and now it is time to set the connection
2156 back to only for input. When there is again some outgoing data
2157 available for this connection it will be set for output as well.
2158 This call clears the output setting and sets it only for input. */
2159 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2160 SILC_UNSET_OUTBUF_PENDING(sock);
2162 silc_buffer_clear(sock->outbuf);
2166 /* Packet receiving */
2168 /* Read some data from connection */
2169 ret = silc_packet_receive(sock);
2173 SILC_LOG_ERROR(("Error receiving packet from connection "
2174 "%s:%d [%s] %s", sock->hostname, sock->port,
2175 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2176 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2177 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2178 "Router"), strerror(errno)));
2184 SILC_LOG_DEBUG(("Read EOF"));
2186 /* If connection is disconnecting already we will finally
2187 close the connection */
2188 if (SILC_IS_DISCONNECTING(sock)) {
2189 if (sock->user_data)
2190 silc_server_free_sock_user_data(server, sock, NULL);
2191 silc_server_close_connection(server, sock);
2195 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2196 SILC_SET_DISCONNECTING(sock);
2198 if (sock->user_data) {
2200 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2201 silc_server_free_sock_user_data(server, sock, tmp);
2203 silc_server_free_sock_user_data(server, sock, NULL);
2204 } else if (server->router_conn && server->router_conn->sock == sock &&
2205 !server->router && server->standalone)
2206 silc_schedule_task_add(server->schedule, 0,
2207 silc_server_connect_to_router,
2210 SILC_TASK_PRI_NORMAL);
2212 silc_server_close_connection(server, sock);
2216 /* If connection is disconnecting or disconnected we will ignore
2218 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2219 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2223 /* Get keys and stuff from ID entry */
2224 idata = (SilcIDListData)sock->user_data;
2226 cipher = idata->receive_key;
2227 hmac = idata->hmac_receive;
2228 sequence = idata->psn_receive;
2231 /* Process the packet. This will call the parser that will then
2232 decrypt and parse the packet. */
2233 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2234 TRUE : FALSE, cipher, hmac, sequence,
2235 silc_server_packet_parse, server);
2237 /* If processing failed the connection is closed. */
2239 /* On packet processing errors we may close our primary router
2240 connection but won't become primary router if we are the backup
2241 since this is local error condition. */
2242 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2243 server->backup_noswitch = TRUE;
2245 if (sock->user_data)
2246 silc_server_free_sock_user_data(server, sock, NULL);
2247 silc_server_close_connection(server, sock);
2251 /* Parses whole packet, received earlier. */
2253 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2255 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2256 SilcServer server = (SilcServer)parse_ctx->context;
2257 SilcSocketConnection sock = parse_ctx->sock;
2258 SilcPacketContext *packet = parse_ctx->packet;
2259 SilcIDListData idata = (SilcIDListData)sock->user_data;
2262 server->stat.packets_received++;
2264 /* Parse the packet */
2265 if (parse_ctx->normal)
2266 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2268 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2270 /* If entry is disabled ignore what we got. */
2271 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2272 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2273 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2274 SILC_LOG_DEBUG(("Connection is disabled"));
2278 if (ret == SILC_PACKET_NONE) {
2279 SILC_LOG_DEBUG(("Error parsing packet"));
2283 /* Check that the the current client ID is same as in the client's packet. */
2284 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2285 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2286 if (client && client->id && packet->src_id) {
2287 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2288 packet->src_id_type);
2289 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2291 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2298 if (server->server_type == SILC_ROUTER) {
2299 /* Route the packet if it is not destined to us. Other ID types but
2300 server are handled separately after processing them. */
2301 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2302 packet->dst_id_type == SILC_ID_SERVER &&
2303 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2304 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2306 /* Route the packet to fastest route for the destination ID */
2307 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2308 packet->dst_id_type);
2311 silc_server_packet_route(server,
2312 silc_server_route_get(server, id,
2313 packet->dst_id_type),
2320 /* Parse the incoming packet type */
2321 silc_server_packet_parse_type(server, sock, packet);
2323 /* Broadcast packet if it is marked as broadcast packet and it is
2324 originated from router and we are router. */
2325 if (server->server_type == SILC_ROUTER &&
2326 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2327 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2328 /* Broadcast to our primary route */
2329 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2331 /* If we have backup routers then we need to feed all broadcast
2332 data to those servers. */
2333 silc_server_backup_broadcast(server, sock, packet);
2337 silc_packet_context_free(packet);
2338 silc_free(parse_ctx);
2341 /* Parser callback called by silc_packet_receive_process. This merely
2342 registers timeout that will handle the actual parsing when appropriate. */
2344 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2347 SilcServer server = (SilcServer)context;
2348 SilcSocketConnection sock = parser_context->sock;
2349 SilcIDListData idata = (SilcIDListData)sock->user_data;
2353 idata->psn_receive = parser_context->packet->sequence + 1;
2355 /* If protocol for this connection is key exchange or rekey then we'll
2356 process all packets synchronously, since there might be packets in
2357 queue that we are not able to decrypt without first processing the
2358 packets before them. */
2359 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2360 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2361 (sock->protocol && sock->protocol->protocol &&
2362 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2363 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2364 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2367 /* Reprocess data since we'll return FALSE here. This is because
2368 the idata->receive_key might have become valid in the last packet
2369 and we want to call this processor with valid cipher. */
2371 ret = silc_packet_receive_process(
2372 sock, server->server_type == SILC_ROUTER ?
2373 TRUE : FALSE, idata->receive_key,
2374 idata->hmac_receive, idata->psn_receive,
2375 silc_server_packet_parse, server);
2377 ret = silc_packet_receive_process(
2378 sock, server->server_type == SILC_ROUTER ?
2379 TRUE : FALSE, NULL, NULL, 0,
2380 silc_server_packet_parse, server);
2383 /* On packet processing errors we may close our primary router
2384 connection but won't become primary router if we are the backup
2385 since this is local error condition. */
2386 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2387 server->backup_noswitch = TRUE;
2389 if (sock->user_data)
2390 silc_server_free_sock_user_data(server, sock, NULL);
2391 silc_server_close_connection(server, sock);
2397 switch (sock->type) {
2398 case SILC_SOCKET_TYPE_UNKNOWN:
2399 case SILC_SOCKET_TYPE_CLIENT:
2400 /* Parse the packet with timeout */
2401 silc_schedule_task_add(server->schedule, sock->sock,
2402 silc_server_packet_parse_real,
2403 (void *)parser_context, 0, 100000,
2405 SILC_TASK_PRI_NORMAL);
2407 case SILC_SOCKET_TYPE_SERVER:
2408 case SILC_SOCKET_TYPE_ROUTER:
2409 /* Packets from servers are parsed immediately */
2410 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2420 /* Parses the packet type and calls what ever routines the packet type
2421 requires. This is done for all incoming packets. */
2423 void silc_server_packet_parse_type(SilcServer server,
2424 SilcSocketConnection sock,
2425 SilcPacketContext *packet)
2427 SilcPacketType type = packet->type;
2428 SilcIDListData idata = (SilcIDListData)sock->user_data;
2430 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2431 silc_get_packet_name(type), packet->flags));
2433 /* Parse the packet type */
2435 case SILC_PACKET_DISCONNECT:
2438 char *message = NULL;
2440 if (packet->flags & SILC_PACKET_FLAG_LIST)
2442 if (packet->buffer->len < 1)
2445 status = (SilcStatus)packet->buffer->data[0];
2446 if (packet->buffer->len > 1 &&
2447 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2448 message = silc_memdup(packet->buffer->data + 1,
2449 packet->buffer->len - 1);
2451 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2452 sock->ip, sock->hostname,
2453 silc_get_status_message(status), status,
2454 message ? message : ""));
2457 /* Handle the disconnection from our end too */
2458 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2459 silc_server_free_sock_user_data(server, sock, NULL);
2460 silc_server_close_connection(server, sock);
2464 case SILC_PACKET_SUCCESS:
2466 * Success received for something. For now we can have only
2467 * one protocol for connection executing at once hence this
2468 * success message is for whatever protocol is executing currently.
2470 if (packet->flags & SILC_PACKET_FLAG_LIST)
2473 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2476 case SILC_PACKET_FAILURE:
2478 * Failure received for something. For now we can have only
2479 * one protocol for connection executing at once hence this
2480 * failure message is for whatever protocol is executing currently.
2482 if (packet->flags & SILC_PACKET_FLAG_LIST)
2484 if (sock->protocol) {
2485 SilcServerFailureContext f;
2486 f = silc_calloc(1, sizeof(*f));
2487 f->sock = silc_socket_dup(sock);
2489 /* We will wait 5 seconds to process this failure packet */
2490 silc_schedule_task_add(server->schedule, sock->sock,
2491 silc_server_failure_callback, (void *)f, 5, 0,
2492 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2496 case SILC_PACKET_REJECT:
2497 if (packet->flags & SILC_PACKET_FLAG_LIST)
2502 case SILC_PACKET_NOTIFY:
2504 * Received notify packet. Server can receive notify packets from
2505 * router. Server then relays the notify messages to clients if needed.
2507 if (packet->flags & SILC_PACKET_FLAG_LIST)
2508 silc_server_notify_list(server, sock, packet);
2510 silc_server_notify(server, sock, packet);
2516 case SILC_PACKET_CHANNEL_MESSAGE:
2518 * Received channel message. Channel messages are special packets
2519 * (although probably most common ones) thus they are handled
2522 if (packet->flags & SILC_PACKET_FLAG_LIST)
2524 idata->last_receive = time(NULL);
2525 silc_server_channel_message(server, sock, packet);
2528 case SILC_PACKET_CHANNEL_KEY:
2530 * Received key for channel. As channels are created by the router
2531 * the keys are as well. We will distribute the key to all of our
2532 * locally connected clients on the particular channel. Router
2533 * never receives this channel and thus is ignored.
2535 if (packet->flags & SILC_PACKET_FLAG_LIST)
2537 silc_server_channel_key(server, sock, packet);
2543 case SILC_PACKET_COMMAND:
2545 * Recived command. Processes the command request and allocates the
2546 * command context and calls the command.
2548 if (packet->flags & SILC_PACKET_FLAG_LIST)
2550 silc_server_command_process(server, sock, packet);
2553 case SILC_PACKET_COMMAND_REPLY:
2555 * Received command reply packet. Received command reply to command. It
2556 * may be reply to command sent by us or reply to command sent by client
2557 * that we've routed further.
2559 if (packet->flags & SILC_PACKET_FLAG_LIST)
2561 silc_server_command_reply(server, sock, packet);
2565 * Private Message packets
2567 case SILC_PACKET_PRIVATE_MESSAGE:
2569 * Received private message packet. The packet is coming from either
2572 if (packet->flags & SILC_PACKET_FLAG_LIST)
2574 idata->last_receive = time(NULL);
2575 silc_server_private_message(server, sock, packet);
2578 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2580 * Private message key packet.
2582 if (packet->flags & SILC_PACKET_FLAG_LIST)
2584 silc_server_private_message_key(server, sock, packet);
2588 * Key Exchange protocol packets
2590 case SILC_PACKET_KEY_EXCHANGE:
2591 if (packet->flags & SILC_PACKET_FLAG_LIST)
2594 if (sock->protocol && sock->protocol->protocol &&
2595 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2596 SilcServerKEInternalContext *proto_ctx =
2597 (SilcServerKEInternalContext *)sock->protocol->context;
2599 proto_ctx->packet = silc_packet_context_dup(packet);
2601 /* Let the protocol handle the packet */
2602 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2604 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2605 "protocol active, packet dropped."));
2609 case SILC_PACKET_KEY_EXCHANGE_1:
2610 if (packet->flags & SILC_PACKET_FLAG_LIST)
2613 if (sock->protocol && sock->protocol->protocol &&
2614 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2615 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2617 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2618 SilcServerRekeyInternalContext *proto_ctx =
2619 (SilcServerRekeyInternalContext *)sock->protocol->context;
2621 if (proto_ctx->packet)
2622 silc_packet_context_free(proto_ctx->packet);
2624 proto_ctx->packet = silc_packet_context_dup(packet);
2626 /* Let the protocol handle the packet */
2627 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2629 SilcServerKEInternalContext *proto_ctx =
2630 (SilcServerKEInternalContext *)sock->protocol->context;
2632 if (proto_ctx->packet)
2633 silc_packet_context_free(proto_ctx->packet);
2635 proto_ctx->packet = silc_packet_context_dup(packet);
2636 proto_ctx->dest_id_type = packet->src_id_type;
2637 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2638 packet->src_id_type);
2639 if (!proto_ctx->dest_id)
2642 /* Let the protocol handle the packet */
2643 silc_protocol_execute(sock->protocol, server->schedule,
2647 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2648 "protocol active, packet dropped."));
2652 case SILC_PACKET_KEY_EXCHANGE_2:
2653 if (packet->flags & SILC_PACKET_FLAG_LIST)
2656 if (sock->protocol && sock->protocol->protocol &&
2657 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2658 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2660 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2661 SilcServerRekeyInternalContext *proto_ctx =
2662 (SilcServerRekeyInternalContext *)sock->protocol->context;
2664 if (proto_ctx->packet)
2665 silc_packet_context_free(proto_ctx->packet);
2667 proto_ctx->packet = silc_packet_context_dup(packet);
2669 /* Let the protocol handle the packet */
2670 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2672 SilcServerKEInternalContext *proto_ctx =
2673 (SilcServerKEInternalContext *)sock->protocol->context;
2675 if (proto_ctx->packet)
2676 silc_packet_context_free(proto_ctx->packet);
2678 proto_ctx->packet = silc_packet_context_dup(packet);
2679 proto_ctx->dest_id_type = packet->src_id_type;
2680 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2681 packet->src_id_type);
2682 if (!proto_ctx->dest_id)
2685 /* Let the protocol handle the packet */
2686 silc_protocol_execute(sock->protocol, server->schedule,
2690 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2691 "protocol active, packet dropped."));
2695 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2697 * Connection authentication request packet. When we receive this packet
2698 * we will send to the other end information about our mandatory
2699 * authentication method for the connection. This packet maybe received
2702 if (packet->flags & SILC_PACKET_FLAG_LIST)
2704 silc_server_connection_auth_request(server, sock, packet);
2708 * Connection Authentication protocol packets
2710 case SILC_PACKET_CONNECTION_AUTH:
2711 /* Start of the authentication protocol. We receive here the
2712 authentication data and will verify it. */
2713 if (packet->flags & SILC_PACKET_FLAG_LIST)
2716 if (sock->protocol && sock->protocol->protocol->type
2717 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2719 SilcServerConnAuthInternalContext *proto_ctx =
2720 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2722 proto_ctx->packet = silc_packet_context_dup(packet);
2724 /* Let the protocol handle the packet */
2725 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2727 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2728 "protocol active, packet dropped."));
2732 case SILC_PACKET_NEW_ID:
2734 * Received New ID packet. This includes some new ID that has been
2735 * created. It may be for client, server or channel. This is the way
2736 * to distribute information about new registered entities in the
2739 if (packet->flags & SILC_PACKET_FLAG_LIST)
2740 silc_server_new_id_list(server, sock, packet);
2742 silc_server_new_id(server, sock, packet);
2745 case SILC_PACKET_NEW_CLIENT:
2747 * Received new client packet. This includes client information that
2748 * we will use to create initial client ID. After creating new
2749 * ID we will send it to the client.
2751 if (packet->flags & SILC_PACKET_FLAG_LIST)
2753 silc_server_new_client(server, sock, packet);
2756 case SILC_PACKET_NEW_SERVER:
2758 * Received new server packet. This includes Server ID and some other
2759 * information that we may save. This is received after server has
2762 if (packet->flags & SILC_PACKET_FLAG_LIST)
2764 silc_server_new_server(server, sock, packet);
2767 case SILC_PACKET_NEW_CHANNEL:
2769 * Received new channel packet. Information about new channel in the
2770 * network are distributed using this packet.
2772 if (packet->flags & SILC_PACKET_FLAG_LIST)
2773 silc_server_new_channel_list(server, sock, packet);
2775 silc_server_new_channel(server, sock, packet);
2778 case SILC_PACKET_HEARTBEAT:
2780 * Received heartbeat.
2782 if (packet->flags & SILC_PACKET_FLAG_LIST)
2786 case SILC_PACKET_KEY_AGREEMENT:
2788 * Received heartbeat.
2790 if (packet->flags & SILC_PACKET_FLAG_LIST)
2792 silc_server_key_agreement(server, sock, packet);
2795 case SILC_PACKET_REKEY:
2797 * Received re-key packet. The sender wants to regenerate the session
2800 if (packet->flags & SILC_PACKET_FLAG_LIST)
2802 silc_server_rekey(server, sock, packet);
2805 case SILC_PACKET_REKEY_DONE:
2807 * The re-key is done.
2809 if (packet->flags & SILC_PACKET_FLAG_LIST)
2812 if (sock->protocol && sock->protocol->protocol &&
2813 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2815 SilcServerRekeyInternalContext *proto_ctx =
2816 (SilcServerRekeyInternalContext *)sock->protocol->context;
2818 if (proto_ctx->packet)
2819 silc_packet_context_free(proto_ctx->packet);
2821 proto_ctx->packet = silc_packet_context_dup(packet);
2823 /* Let the protocol handle the packet */
2824 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2826 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2827 "protocol active, packet dropped."));
2831 case SILC_PACKET_FTP:
2833 if (packet->flags & SILC_PACKET_FLAG_LIST)
2835 silc_server_ftp(server, sock, packet);
2838 case SILC_PACKET_RESUME_CLIENT:
2840 if (packet->flags & SILC_PACKET_FLAG_LIST)
2842 silc_server_resume_client(server, sock, packet);
2845 case SILC_PACKET_RESUME_ROUTER:
2846 /* Resume router packet received. This packet is received for backup
2847 router resuming protocol. */
2848 if (packet->flags & SILC_PACKET_FLAG_LIST)
2850 silc_server_backup_resume_router(server, sock, packet);
2854 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2859 /* Creates connection to a remote router. */
2861 void silc_server_create_connection(SilcServer server,
2862 const char *remote_host, SilcUInt32 port)
2864 SilcServerConnection sconn;
2866 /* Allocate connection object for hold connection specific stuff. */
2867 sconn = silc_calloc(1, sizeof(*sconn));
2868 sconn->remote_host = strdup(remote_host);
2869 sconn->remote_port = port;
2870 sconn->no_reconnect = TRUE;
2872 silc_schedule_task_add(server->schedule, 0,
2873 silc_server_connect_router,
2874 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2875 SILC_TASK_PRI_NORMAL);
2878 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2880 silc_socket_free(context);
2883 /* Closes connection to socket connection */
2885 void silc_server_close_connection(SilcServer server,
2886 SilcSocketConnection sock)
2890 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2891 silc_schedule_task_add(server->schedule, 0,
2892 silc_server_close_connection_final,
2893 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2894 SILC_TASK_PRI_NORMAL);
2898 memset(tmp, 0, sizeof(tmp));
2899 silc_socket_get_error(sock, tmp, sizeof(tmp));
2900 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2902 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2903 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2904 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2905 "Router"), tmp[0] ? tmp : ""));
2907 /* We won't listen for this connection anymore */
2908 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2910 /* Unregister all tasks */
2911 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2913 /* Close the actual connection */
2914 silc_net_close_connection(sock->sock);
2915 server->sockets[sock->sock] = NULL;
2917 /* If sock->user_data is NULL then we'll check for active protocols
2918 here since the silc_server_free_sock_user_data has not been called
2919 for this connection. */
2920 if (!sock->user_data) {
2921 /* If any protocol is active cancel its execution. It will call
2922 the final callback which will finalize the disconnection. */
2923 if (sock->protocol) {
2924 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2925 silc_protocol_cancel(sock->protocol, server->schedule);
2926 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2927 silc_protocol_execute_final(sock->protocol, server->schedule);
2928 sock->protocol = NULL;
2933 silc_schedule_task_add(server->schedule, 0,
2934 silc_server_close_connection_final,
2935 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2936 SILC_TASK_PRI_NORMAL);
2939 /* Sends disconnect message to remote connection and disconnects the
2942 void silc_server_disconnect_remote(SilcServer server,
2943 SilcSocketConnection sock,
2944 SilcStatus status, ...)
2947 unsigned char buf[512];
2952 if (!sock || SILC_IS_DISCONNECTED(sock))
2955 memset(buf, 0, sizeof(buf));
2956 va_start(ap, status);
2957 cp = va_arg(ap, char *);
2959 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2964 SILC_LOG_DEBUG(("Disconnecting remote host"));
2966 /* Notify remote end that the conversation is over. The notify message
2967 is tried to be sent immediately. */
2971 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2973 buffer = silc_buffer_alloc_size(len);
2977 buffer->data[0] = status;
2979 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2981 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2982 buffer->data, buffer->len, TRUE);
2983 silc_buffer_free(buffer);
2986 silc_server_packet_queue_purge(server, sock);
2988 /* Mark the connection to be disconnected */
2989 SILC_SET_DISCONNECTED(sock);
2990 silc_server_close_connection(server, sock);
2993 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2995 SilcServer server = app_context;
2996 SilcClientEntry client = context;
2998 assert(!silc_hash_table_count(client->channels));
3000 silc_idlist_del_data(client);
3001 silc_idcache_purge_by_context(server->local_list->clients, client);
3004 /* Frees client data and notifies about client's signoff. */
3006 void silc_server_free_client_data(SilcServer server,
3007 SilcSocketConnection sock,
3008 SilcClientEntry client,
3010 const char *signoff)
3012 SILC_LOG_DEBUG(("Freeing client data"));
3014 /* If there is pending outgoing data for the client then purge it
3015 to the network before removing the client entry. */
3016 silc_server_packet_queue_purge(server, sock);
3019 /* Check if anyone is watching this nickname */
3020 if (server->server_type == SILC_ROUTER)
3021 silc_server_check_watcher_list(server, client, NULL,
3022 SILC_NOTIFY_TYPE_SIGNOFF);
3024 /* Send SIGNOFF notify to routers. */
3026 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3027 SILC_BROADCAST(server), client->id,
3031 /* Remove client from all channels */
3033 silc_server_remove_from_channels(server, NULL, client,
3034 TRUE, (char *)signoff, TRUE);
3036 silc_server_remove_from_channels(server, NULL, client,
3037 FALSE, NULL, FALSE);
3039 /* Remove this client from watcher list if it is */
3040 silc_server_del_from_watcher_list(server, client);
3042 /* Update statistics */
3043 server->stat.my_clients--;
3044 server->stat.clients--;
3045 if (server->stat.cell_clients)
3046 server->stat.cell_clients--;
3047 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3048 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3049 silc_schedule_task_del_by_context(server->schedule, client);
3051 /* We will not delete the client entry right away. We will take it
3052 into history (for WHOWAS command) for 5 minutes, unless we're
3053 shutting down server. */
3054 if (!server->server_shutdown) {
3055 silc_schedule_task_add(server->schedule, 0,
3056 silc_server_free_client_data_timeout,
3058 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3059 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3060 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3062 client->router = NULL;
3063 client->connection = NULL;
3065 /* Delete directly since we're shutting down server */
3066 silc_idlist_del_data(client);
3067 silc_idlist_del_client(server->local_list, client);
3071 /* Frees user_data pointer from socket connection object. This also sends
3072 appropriate notify packets to the network to inform about leaving
3075 void silc_server_free_sock_user_data(SilcServer server,
3076 SilcSocketConnection sock,
3077 const char *signoff_message)
3079 switch (sock->type) {
3080 case SILC_SOCKET_TYPE_CLIENT:
3082 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3083 silc_server_free_client_data(server, sock, user_data, TRUE,
3087 case SILC_SOCKET_TYPE_SERVER:
3088 case SILC_SOCKET_TYPE_ROUTER:
3090 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3091 SilcServerEntry backup_router = NULL;
3093 SILC_LOG_DEBUG(("Freeing server data"));
3096 backup_router = silc_server_backup_get(server, user_data->id);
3098 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3099 backup_router == server->id_entry &&
3100 sock->type != SILC_SOCKET_TYPE_ROUTER)
3101 backup_router = NULL;
3103 if (server->server_shutdown || server->backup_noswitch)
3104 backup_router = NULL;
3106 /* If this was our primary router connection then we're lost to
3107 the outside world. */
3108 if (server->router == user_data) {
3109 /* Check whether we have a backup router connection */
3110 if (!backup_router || backup_router == user_data) {
3111 silc_schedule_task_add(server->schedule, 0,
3112 silc_server_connect_to_router,
3115 SILC_TASK_PRI_NORMAL);
3117 server->id_entry->router = NULL;
3118 server->router = NULL;
3119 server->standalone = TRUE;
3120 backup_router = NULL;
3122 if (server->id_entry != backup_router) {
3123 SILC_LOG_INFO(("New primary router is backup router %s",
3124 backup_router->server_name));
3125 server->id_entry->router = backup_router;
3126 server->router = backup_router;
3127 server->router_connect = time(0);
3128 server->backup_primary = TRUE;
3130 SILC_LOG_INFO(("We are now new primary router in this cell"));
3131 server->id_entry->router = NULL;
3132 server->router = NULL;
3133 server->standalone = TRUE;
3135 /* We stop here to take a breath */
3139 if (server->server_type == SILC_BACKUP_ROUTER) {
3140 server->server_type = SILC_ROUTER;
3142 /* We'll need to constantly try to reconnect to the primary
3143 router so that we'll see when it comes back online. */
3144 silc_server_backup_reconnect(server, sock->ip, sock->port,
3145 silc_server_backup_connected,
3149 /* Mark this connection as replaced */
3150 silc_server_backup_replaced_add(server, user_data->id,
3153 } else if (backup_router) {
3154 SILC_LOG_INFO(("Enabling the use of backup router %s",
3155 backup_router->server_name));
3156 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3157 backup_router->server_name));
3159 /* Mark this connection as replaced */
3160 silc_server_backup_replaced_add(server, user_data->id,
3164 if (!backup_router) {
3165 /* Remove all servers that are originated from this server, and
3166 remove the clients of those servers too. */
3167 silc_server_remove_servers_by_server(server, user_data, TRUE);
3169 /* Remove the clients that this server owns as they will become
3170 invalid now too. For backup router the server is actually
3171 coming from the primary router, so mark that as the owner
3173 if (server->server_type == SILC_BACKUP_ROUTER &&
3174 sock->type == SILC_SOCKET_TYPE_SERVER)
3175 silc_server_remove_clients_by_server(server, server->router,
3178 silc_server_remove_clients_by_server(server, user_data,
3181 /* Remove channels owned by this server */
3182 if (server->server_type == SILC_SERVER)
3183 silc_server_remove_channels_by_server(server, user_data);
3185 /* Enable local server connections that may be disabled */
3186 silc_server_local_servers_toggle_enabled(server, TRUE);
3188 /* Update the client entries of this server to the new backup
3189 router. If we are the backup router we also resolve the real
3190 servers for the clients. After updating is over this also
3191 removes the clients that this server explicitly owns. */
3192 silc_server_update_clients_by_server(server, user_data,
3193 backup_router, TRUE);
3195 /* If we are router and just lost our primary router (now standlaone)
3196 we remove everything that was behind it, since we don't know
3198 if (server->server_type == SILC_ROUTER && server->standalone)
3199 /* Remove all servers that are originated from this server, and
3200 remove the clients of those servers too. */
3201 silc_server_remove_servers_by_server(server, user_data, TRUE);
3203 /* Finally remove the clients that are explicitly owned by this
3204 server. They go down with the server. */
3205 silc_server_remove_clients_by_server(server, user_data,
3208 /* Update our server cache to use the new backup router too. */
3209 silc_server_update_servers_by_server(server, user_data, backup_router);
3210 if (server->server_type == SILC_SERVER)
3211 silc_server_update_channels_by_server(server, user_data,
3214 /* Send notify about primary router going down to local operators */
3215 if (server->backup_router)
3216 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3217 SILC_NOTIFY_TYPE_NONE,
3218 ("%s switched to backup router %s "
3219 "(we are primary router now)",
3220 server->server_name, server->server_name));
3221 else if (server->router)
3222 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3223 SILC_NOTIFY_TYPE_NONE,
3224 ("%s switched to backup router %s",
3225 server->server_name,
3226 server->router->server_name));
3228 server->backup_noswitch = FALSE;
3230 /* Free the server entry */
3231 silc_server_backup_del(server, user_data);
3232 silc_server_backup_replaced_del(server, user_data);
3233 silc_idlist_del_data(user_data);
3234 if (!silc_idlist_del_server(server->local_list, user_data))
3235 silc_idlist_del_server(server->global_list, user_data);
3236 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3237 server->stat.my_servers--;
3239 server->stat.my_routers--;
3240 server->stat.routers--;
3242 server->stat.servers--;
3243 if (server->server_type == SILC_ROUTER)
3244 server->stat.cell_servers--;
3246 if (backup_router && backup_router != server->id_entry) {
3247 /* Announce all of our stuff that was created about 5 minutes ago.
3248 The backup router knows all the other stuff already. */
3249 if (server->server_type == SILC_ROUTER)
3250 silc_server_announce_servers(server, FALSE, time(0) - 300,
3251 backup_router->connection);
3253 /* Announce our clients and channels to the router */
3254 silc_server_announce_clients(server, time(0) - 300,
3255 backup_router->connection);
3256 silc_server_announce_channels(server, time(0) - 300,
3257 backup_router->connection);
3263 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3265 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3267 silc_idlist_del_data(user_data);
3268 silc_free(user_data);
3273 /* If any protocol is active cancel its execution */
3274 if (sock->protocol) {
3275 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3276 silc_protocol_cancel(sock->protocol, server->schedule);
3277 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3278 silc_protocol_execute_final(sock->protocol, server->schedule);
3279 sock->protocol = NULL;
3282 sock->user_data = NULL;
3285 /* Removes client from all channels it has joined. This is used when client
3286 connection is disconnected. If the client on a channel is last, the
3287 channel is removed as well. This sends the SIGNOFF notify types. */
3289 void silc_server_remove_from_channels(SilcServer server,
3290 SilcSocketConnection sock,
3291 SilcClientEntry client,
3293 const char *signoff_message,
3296 SilcChannelEntry channel;
3297 SilcChannelClientEntry chl;
3298 SilcHashTableList htl;
3299 SilcBuffer clidp = NULL;
3304 SILC_LOG_DEBUG(("Removing client from joined channels"));
3306 if (notify && !client->id)
3310 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3315 /* Remove the client from all channels. The client is removed from
3316 the channels' user list. */
3317 silc_hash_table_list(client->channels, &htl);
3318 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3319 channel = chl->channel;
3321 /* Remove channel if this is last client leaving the channel, unless
3322 the channel is permanent. */
3323 if (server->server_type != SILC_SERVER &&
3324 silc_hash_table_count(channel->user_list) < 2) {
3325 silc_server_channel_delete(server, channel);
3329 silc_hash_table_del(client->channels, channel);
3330 silc_hash_table_del(channel->user_list, client);
3331 channel->user_count--;
3333 /* If there is no global users on the channel anymore mark the channel
3334 as local channel. Do not check if the removed client is local client. */
3335 if (server->server_type == SILC_SERVER && channel->global_users &&
3336 chl->client->router && !silc_server_channel_has_global(channel))
3337 channel->global_users = FALSE;
3339 memset(chl, 'A', sizeof(*chl));
3342 /* Update statistics */
3343 if (SILC_IS_LOCAL(client))
3344 server->stat.my_chanclients--;
3345 if (server->server_type == SILC_ROUTER) {
3346 server->stat.cell_chanclients--;
3347 server->stat.chanclients--;
3350 /* If there is not at least one local user on the channel then we don't
3351 need the channel entry anymore, we can remove it safely, unless the
3352 channel is permanent channel */
3353 if (server->server_type == SILC_SERVER &&
3354 !silc_server_channel_has_local(channel)) {
3355 /* Notify about leaving client if this channel has global users. */
3356 if (notify && channel->global_users)
3357 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3358 SILC_NOTIFY_TYPE_SIGNOFF,
3359 signoff_message ? 2 : 1,
3360 clidp->data, clidp->len,
3361 signoff_message, signoff_message ?
3362 strlen(signoff_message) : 0);
3364 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3365 silc_server_channel_delete(server, channel);
3369 /* Send notify to channel about client leaving SILC and channel too */
3371 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3372 SILC_NOTIFY_TYPE_SIGNOFF,
3373 signoff_message ? 2 : 1,
3374 clidp->data, clidp->len,
3375 signoff_message, signoff_message ?
3376 strlen(signoff_message) : 0);
3378 /* Don't create keys if we are shutting down */
3379 if (server->server_shutdown)
3382 /* Re-generate channel key if needed */
3383 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3384 if (!silc_server_create_channel_key(server, channel, 0))
3387 /* Send the channel key to the channel. The key of course is not sent
3388 to the client who was removed from the channel. */
3389 silc_server_send_channel_key(server, client->connection, channel,
3390 server->server_type == SILC_ROUTER ?
3391 FALSE : !server->standalone);
3395 silc_hash_table_list_reset(&htl);
3397 silc_buffer_free(clidp);
3400 /* Removes client from one channel. This is used for example when client
3401 calls LEAVE command to remove itself from the channel. Returns TRUE
3402 if channel still exists and FALSE if the channel is removed when
3403 last client leaves the channel. If `notify' is FALSE notify messages
3406 bool silc_server_remove_from_one_channel(SilcServer server,
3407 SilcSocketConnection sock,
3408 SilcChannelEntry channel,
3409 SilcClientEntry client,
3412 SilcChannelClientEntry chl;
3415 SILC_LOG_DEBUG(("Removing %s from channel %s",
3416 silc_id_render(client->id, SILC_ID_CLIENT),
3417 channel->channel_name));
3419 /* Get the entry to the channel, if this client is not on the channel
3421 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3424 /* Remove channel if this is last client leaving the channel, unless
3425 the channel is permanent. */
3426 if (server->server_type != SILC_SERVER &&
3427 silc_hash_table_count(channel->user_list) < 2) {
3428 silc_server_channel_delete(server, channel);
3432 silc_hash_table_del(client->channels, channel);
3433 silc_hash_table_del(channel->user_list, client);
3434 channel->user_count--;
3436 /* If there is no global users on the channel anymore mark the channel
3437 as local channel. Do not check if the client is local client. */
3438 if (server->server_type == SILC_SERVER && channel->global_users &&
3439 chl->client->router && !silc_server_channel_has_global(channel))
3440 channel->global_users = FALSE;
3442 memset(chl, 'O', sizeof(*chl));
3445 /* Update statistics */
3446 if (SILC_IS_LOCAL(client))
3447 server->stat.my_chanclients--;
3448 if (server->server_type == SILC_ROUTER) {
3449 server->stat.cell_chanclients--;
3450 server->stat.chanclients--;
3453 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3457 /* If there is not at least one local user on the channel then we don't
3458 need the channel entry anymore, we can remove it safely, unless the
3459 channel is permanent channel */
3460 if (server->server_type == SILC_SERVER &&
3461 !silc_server_channel_has_local(channel)) {
3462 /* Notify about leaving client if this channel has global users. */
3463 if (notify && channel->global_users)
3464 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3465 SILC_NOTIFY_TYPE_LEAVE, 1,
3466 clidp->data, clidp->len);
3468 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3469 silc_server_channel_delete(server, channel);
3470 silc_buffer_free(clidp);
3474 /* Send notify to channel about client leaving the channel */
3476 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3477 SILC_NOTIFY_TYPE_LEAVE, 1,
3478 clidp->data, clidp->len);
3480 silc_buffer_free(clidp);
3484 /* Timeout callback. This is called if connection is idle or for some
3485 other reason is not responding within some period of time. This
3486 disconnects the remote end. */
3488 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3490 SilcServer server = (SilcServer)context;
3491 SilcSocketConnection sock = server->sockets[fd];
3492 SilcProtocolType protocol = 0;
3494 SILC_LOG_DEBUG(("Start"));
3499 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3500 sock->hostname, sock->ip));
3502 /* If we have protocol active we must assure that we call the protocol's
3503 final callback so that all the memory is freed. */
3504 if (sock->protocol) {
3505 protocol = sock->protocol->protocol->type;
3506 silc_protocol_cancel(sock->protocol, server->schedule);
3507 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3508 silc_protocol_execute_final(sock->protocol, server->schedule);
3509 sock->protocol = NULL;
3513 if (sock->user_data)
3514 silc_server_free_sock_user_data(server, sock, NULL);
3516 silc_server_disconnect_remote(server, sock,
3518 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3519 SILC_STATUS_ERR_AUTH_FAILED :
3520 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3521 "Connection timeout");
3524 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3525 function may be used only by router. In real SILC network all channels
3526 are created by routers thus this function is never used by normal
3529 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3530 SilcServerID *router_id,
3536 SilcChannelID *channel_id;
3537 SilcChannelEntry entry;
3541 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3544 cipher = SILC_DEFAULT_CIPHER;
3546 hmac = SILC_DEFAULT_HMAC;
3548 /* Allocate cipher */
3549 if (!silc_cipher_alloc(cipher, &key))
3553 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3554 silc_cipher_free(key);
3558 channel_name = strdup(channel_name);
3560 /* Create the channel ID */
3561 if (!silc_id_create_channel_id(server, router_id, server->rng,
3563 silc_free(channel_name);
3564 silc_cipher_free(key);
3565 silc_hmac_free(newhmac);
3569 /* Create the channel */
3570 entry = silc_idlist_add_channel(server->local_list, channel_name,
3571 SILC_CHANNEL_MODE_NONE, channel_id,
3572 NULL, key, newhmac, 0);
3574 silc_free(channel_name);
3575 silc_cipher_free(key);
3576 silc_hmac_free(newhmac);
3577 silc_free(channel_id);
3581 entry->cipher = strdup(cipher);
3582 entry->hmac_name = strdup(hmac);
3584 /* Now create the actual key material */
3585 if (!silc_server_create_channel_key(server, entry,
3586 silc_cipher_get_key_len(key) / 8)) {
3587 silc_idlist_del_channel(server->local_list, entry);
3591 /* Notify other routers about the new channel. We send the packet
3592 to our primary route. */
3594 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3595 channel_name, entry->id,
3596 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3599 /* Distribute to backup routers */
3600 if (broadcast && server->server_type == SILC_ROUTER) {
3603 SilcUInt32 name_len = strlen(channel_name);
3604 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3605 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3607 packet = silc_channel_payload_encode(channel_name, name_len,
3608 cid, channel_id_len, entry->mode);
3609 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3610 packet->data, packet->len, FALSE, TRUE);
3612 silc_buffer_free(packet);
3615 server->stat.my_channels++;
3616 if (server->server_type == SILC_ROUTER) {
3617 server->stat.channels++;
3618 server->stat.cell_channels++;
3619 entry->users_resolved = TRUE;
3625 /* Same as above but creates the channel with Channel ID `channel_id. */
3628 silc_server_create_new_channel_with_id(SilcServer server,
3632 SilcChannelID *channel_id,
3635 SilcChannelEntry entry;
3639 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3642 cipher = SILC_DEFAULT_CIPHER;
3644 hmac = SILC_DEFAULT_HMAC;
3646 /* Allocate cipher */
3647 if (!silc_cipher_alloc(cipher, &key))
3651 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3652 silc_cipher_free(key);
3656 channel_name = strdup(channel_name);
3658 /* Create the channel */
3659 entry = silc_idlist_add_channel(server->local_list, channel_name,
3660 SILC_CHANNEL_MODE_NONE, channel_id,
3661 NULL, key, newhmac, 0);
3663 silc_cipher_free(key);
3664 silc_hmac_free(newhmac);
3665 silc_free(channel_name);
3669 /* Now create the actual key material */
3670 if (!silc_server_create_channel_key(server, entry,
3671 silc_cipher_get_key_len(key) / 8)) {
3672 silc_idlist_del_channel(server->local_list, entry);
3676 /* Notify other routers about the new channel. We send the packet
3677 to our primary route. */
3679 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3680 channel_name, entry->id,
3681 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3684 /* Distribute to backup routers */
3685 if (broadcast && server->server_type == SILC_ROUTER) {
3688 SilcUInt32 name_len = strlen(channel_name);
3689 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3690 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3692 packet = silc_channel_payload_encode(channel_name, name_len,
3693 cid, channel_id_len, entry->mode);
3694 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3695 packet->data, packet->len, FALSE, TRUE);
3697 silc_buffer_free(packet);
3700 server->stat.my_channels++;
3701 if (server->server_type == SILC_ROUTER) {
3702 server->stat.channels++;
3703 server->stat.cell_channels++;
3704 entry->users_resolved = TRUE;
3710 /* Channel's key re-key timeout callback. */
3712 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3714 SilcServer server = app_context;
3715 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3719 /* Return now if we are shutting down */
3720 if (server->server_shutdown)
3723 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3726 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3729 /* Generates new channel key. This is used to create the initial channel key
3730 but also to re-generate new key for channel. If `key_len' is provided
3731 it is the bytes of the key length. */
3733 bool silc_server_create_channel_key(SilcServer server,
3734 SilcChannelEntry channel,
3738 unsigned char channel_key[32], hash[32];
3741 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3742 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3746 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3748 if (!channel->channel_key)
3749 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3750 channel->channel_key = NULL;
3756 else if (channel->key_len)
3757 len = channel->key_len / 8;
3759 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3761 /* Create channel key */
3762 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3765 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3767 /* Remove old key if exists */
3769 memset(channel->key, 0, channel->key_len / 8);
3770 silc_free(channel->key);
3774 channel->key_len = len * 8;
3775 channel->key = silc_memdup(channel_key, len);
3776 memset(channel_key, 0, sizeof(channel_key));
3778 /* Generate HMAC key from the channel key data and set it */
3780 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3781 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3782 silc_hmac_set_key(channel->hmac, hash,
3783 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3784 memset(hash, 0, sizeof(hash));
3786 if (server->server_type == SILC_ROUTER) {
3787 if (!channel->rekey)
3788 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3789 channel->rekey->channel = channel;
3790 channel->rekey->key_len = key_len;
3791 if (channel->rekey->task)
3792 silc_schedule_task_del(server->schedule, channel->rekey->task);
3794 channel->rekey->task =
3795 silc_schedule_task_add(server->schedule, 0,
3796 silc_server_channel_key_rekey,
3797 (void *)channel->rekey,
3798 server->config->channel_rekey_secs, 0,
3800 SILC_TASK_PRI_NORMAL);
3806 /* Saves the channel key found in the encoded `key_payload' buffer. This
3807 function is used when we receive Channel Key Payload and also when we're
3808 processing JOIN command reply. Returns entry to the channel. */
3810 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3811 SilcBuffer key_payload,
3812 SilcChannelEntry channel)
3814 SilcChannelKeyPayload payload = NULL;
3815 SilcChannelID *id = NULL;
3816 unsigned char *tmp, hash[32];
3820 /* Decode channel key payload */
3821 payload = silc_channel_key_payload_parse(key_payload->data,
3824 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3829 /* Get the channel entry */
3832 /* Get channel ID */
3833 tmp = silc_channel_key_get_id(payload, &tmp_len);
3834 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3840 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3842 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3844 if (server->server_type == SILC_ROUTER)
3845 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3846 silc_id_render(id, SILC_ID_CHANNEL)));
3852 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3854 tmp = silc_channel_key_get_key(payload, &tmp_len);
3860 cipher = silc_channel_key_get_cipher(payload, NULL);
3866 /* Remove old key if exists */
3868 memset(channel->key, 0, channel->key_len / 8);
3869 silc_free(channel->key);
3870 silc_cipher_free(channel->channel_key);
3873 /* Create new cipher */
3874 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3875 channel->channel_key = NULL;
3880 if (channel->cipher)
3881 silc_free(channel->cipher);
3882 channel->cipher = strdup(cipher);
3885 channel->key_len = tmp_len * 8;
3886 channel->key = silc_memdup(tmp, tmp_len);
3887 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3889 /* Generate HMAC key from the channel key data and set it */
3891 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3892 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3893 silc_hmac_set_key(channel->hmac, hash,
3894 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3896 memset(hash, 0, sizeof(hash));
3897 memset(tmp, 0, tmp_len);
3899 if (server->server_type == SILC_ROUTER) {
3900 if (!channel->rekey)
3901 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3902 channel->rekey->channel = channel;
3903 if (channel->rekey->task)
3904 silc_schedule_task_del(server->schedule, channel->rekey->task);
3906 channel->rekey->task =
3907 silc_schedule_task_add(server->schedule, 0,
3908 silc_server_channel_key_rekey,
3909 (void *)channel->rekey,
3910 server->config->channel_rekey_secs, 0,
3912 SILC_TASK_PRI_NORMAL);
3918 silc_channel_key_payload_free(payload);
3923 /* Heartbeat callback. This function is set as argument for the
3924 silc_socket_set_heartbeat function. The library will call this function
3925 at the set time interval. */
3927 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3930 SilcServer server = hb_context;
3932 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3933 sock->port, sock->ip));
3935 /* Send the heartbeat */
3936 silc_server_send_heartbeat(server, sock);
3939 /* Returns assembled of all servers in the given ID list. The packet's
3940 form is dictated by the New ID payload. */
3942 static void silc_server_announce_get_servers(SilcServer server,
3943 SilcServerEntry remote,
3945 SilcBuffer *servers,
3946 unsigned long creation_time)
3948 SilcIDCacheList list;
3949 SilcIDCacheEntry id_cache;
3950 SilcServerEntry entry;
3953 /* Go through all clients in the list */
3954 if (silc_idcache_get_all(id_list->servers, &list)) {
3955 if (silc_idcache_list_first(list, &id_cache)) {
3957 entry = (SilcServerEntry)id_cache->context;
3959 /* Do not announce the one we've sending our announcements and
3960 do not announce ourself. Also check the creation time if it's
3962 if ((entry == remote) || (entry == server->id_entry) ||
3963 (creation_time && entry->data.created < creation_time)) {
3964 if (!silc_idcache_list_next(list, &id_cache))
3969 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3971 *servers = silc_buffer_realloc(*servers,
3973 (*servers)->truelen + idp->len :
3975 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3976 silc_buffer_put(*servers, idp->data, idp->len);
3977 silc_buffer_pull(*servers, idp->len);
3978 silc_buffer_free(idp);
3980 if (!silc_idcache_list_next(list, &id_cache))
3985 silc_idcache_list_free(list);
3990 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3996 p = silc_notify_payload_encode(notify, argc, ap);
4002 /* This function is used by router to announce existing servers to our
4003 primary router when we've connected to it. If `creation_time' is non-zero
4004 then only the servers that has been created after the `creation_time'
4005 will be announced. */
4007 void silc_server_announce_servers(SilcServer server, bool global,
4008 unsigned long creation_time,
4009 SilcSocketConnection remote)
4011 SilcBuffer servers = NULL;
4013 SILC_LOG_DEBUG(("Announcing servers"));
4015 /* Get servers in local list */
4016 silc_server_announce_get_servers(server, remote->user_data,
4017 server->local_list, &servers,
4021 /* Get servers in global list */
4022 silc_server_announce_get_servers(server, remote->user_data,
4023 server->global_list, &servers,
4027 silc_buffer_push(servers, servers->data - servers->head);
4028 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4030 /* Send the packet */
4031 silc_server_packet_send(server, remote,
4032 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4033 servers->data, servers->len, TRUE);
4035 silc_buffer_free(servers);
4039 /* Returns assembled packet of all clients in the given ID list. The
4040 packet's form is dictated by the New ID Payload. */
4042 static void silc_server_announce_get_clients(SilcServer server,
4044 SilcBuffer *clients,
4046 unsigned long creation_time)
4048 SilcIDCacheList list;
4049 SilcIDCacheEntry id_cache;
4050 SilcClientEntry client;
4053 unsigned char mode[4];
4055 /* Go through all clients in the list */
4056 if (silc_idcache_get_all(id_list->clients, &list)) {
4057 if (silc_idcache_list_first(list, &id_cache)) {
4059 client = (SilcClientEntry)id_cache->context;
4061 if (creation_time && client->data.created < creation_time) {
4062 if (!silc_idcache_list_next(list, &id_cache))
4066 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4067 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4068 if (!silc_idcache_list_next(list, &id_cache))
4073 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4075 *clients = silc_buffer_realloc(*clients,
4077 (*clients)->truelen + idp->len :
4079 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4080 silc_buffer_put(*clients, idp->data, idp->len);
4081 silc_buffer_pull(*clients, idp->len);
4083 SILC_PUT32_MSB(client->mode, mode);
4085 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4086 2, idp->data, idp->len,
4088 *umodes = silc_buffer_realloc(*umodes,
4090 (*umodes)->truelen + tmp->len :
4092 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4093 silc_buffer_put(*umodes, tmp->data, tmp->len);
4094 silc_buffer_pull(*umodes, tmp->len);
4095 silc_buffer_free(tmp);
4097 silc_buffer_free(idp);
4099 if (!silc_idcache_list_next(list, &id_cache))
4104 silc_idcache_list_free(list);
4108 /* This function is used to announce our existing clients to our router
4109 when we've connected to it. If `creation_time' is non-zero then only
4110 the clients that has been created after the `creation_time' will be
4113 void silc_server_announce_clients(SilcServer server,
4114 unsigned long creation_time,
4115 SilcSocketConnection remote)
4117 SilcBuffer clients = NULL;
4118 SilcBuffer umodes = NULL;
4120 SILC_LOG_DEBUG(("Announcing clients"));
4122 /* Get clients in local list */
4123 silc_server_announce_get_clients(server, server->local_list,
4124 &clients, &umodes, creation_time);
4126 /* As router we announce our global list as well */
4127 if (server->server_type == SILC_ROUTER)
4128 silc_server_announce_get_clients(server, server->global_list,
4129 &clients, &umodes, creation_time);
4132 silc_buffer_push(clients, clients->data - clients->head);
4133 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4135 /* Send the packet */
4136 silc_server_packet_send(server, remote,
4137 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4138 clients->data, clients->len, TRUE);
4140 silc_buffer_free(clients);
4144 silc_buffer_push(umodes, umodes->data - umodes->head);
4145 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4147 /* Send the packet */
4148 silc_server_packet_send(server, remote,
4149 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4150 umodes->data, umodes->len, TRUE);
4152 silc_buffer_free(umodes);
4156 /* Returns channel's topic for announcing it */
4158 void silc_server_announce_get_channel_topic(SilcServer server,
4159 SilcChannelEntry channel,
4164 if (channel->topic) {
4165 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4166 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4167 chidp->data, chidp->len,
4169 strlen(channel->topic));
4170 silc_buffer_free(chidp);
4174 /* Returns assembled packets for channel users of the `channel'. */
4176 void silc_server_announce_get_channel_users(SilcServer server,
4177 SilcChannelEntry channel,
4178 SilcBuffer *channel_modes,
4179 SilcBuffer *channel_users,
4180 SilcBuffer *channel_users_modes)
4182 SilcChannelClientEntry chl;
4183 SilcHashTableList htl;
4184 SilcBuffer chidp, clidp, csidp;
4187 unsigned char mode[4], *fkey = NULL;
4188 SilcUInt32 fkey_len = 0;
4191 SILC_LOG_DEBUG(("Start"));
4193 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4194 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4197 SILC_PUT32_MSB(channel->mode, mode);
4198 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4199 if (channel->founder_key)
4200 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4202 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4203 6, csidp->data, csidp->len,
4206 hmac, hmac ? strlen(hmac) : 0,
4207 channel->passphrase,
4208 channel->passphrase ?
4209 strlen(channel->passphrase) : 0,
4213 silc_buffer_realloc(*channel_modes,
4215 (*channel_modes)->truelen + len : len));
4216 silc_buffer_pull_tail(*channel_modes,
4217 ((*channel_modes)->end -
4218 (*channel_modes)->data));
4219 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4220 silc_buffer_pull(*channel_modes, len);
4221 silc_buffer_free(tmp);
4226 /* Now find all users on the channel */
4227 silc_hash_table_list(channel->user_list, &htl);
4228 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4229 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4232 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4233 clidp->data, clidp->len,
4234 chidp->data, chidp->len);
4237 silc_buffer_realloc(*channel_users,
4239 (*channel_users)->truelen + len : len));
4240 silc_buffer_pull_tail(*channel_users,
4241 ((*channel_users)->end -
4242 (*channel_users)->data));
4244 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4245 silc_buffer_pull(*channel_users, len);
4246 silc_buffer_free(tmp);
4248 /* CUMODE notify for mode change on the channel */
4249 SILC_PUT32_MSB(chl->mode, mode);
4250 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4251 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4252 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4253 4, csidp->data, csidp->len,
4255 clidp->data, clidp->len,
4258 *channel_users_modes =
4259 silc_buffer_realloc(*channel_users_modes,
4260 (*channel_users_modes ?
4261 (*channel_users_modes)->truelen + len : len));
4262 silc_buffer_pull_tail(*channel_users_modes,
4263 ((*channel_users_modes)->end -
4264 (*channel_users_modes)->data));
4266 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4267 silc_buffer_pull(*channel_users_modes, len);
4268 silc_buffer_free(tmp);
4272 silc_buffer_free(clidp);
4274 silc_hash_table_list_reset(&htl);
4275 silc_buffer_free(chidp);
4276 silc_buffer_free(csidp);
4279 /* Returns assembled packets for all channels and users on those channels
4280 from the given ID List. The packets are in the form dictated by the
4281 New Channel and New Channel User payloads. */
4283 void silc_server_announce_get_channels(SilcServer server,
4285 SilcBuffer *channels,
4286 SilcBuffer **channel_modes,
4287 SilcBuffer *channel_users,
4288 SilcBuffer **channel_users_modes,
4289 SilcUInt32 *channel_users_modes_c,
4290 SilcBuffer **channel_topics,
4291 SilcChannelID ***channel_ids,
4292 unsigned long creation_time)
4294 SilcIDCacheList list;
4295 SilcIDCacheEntry id_cache;
4296 SilcChannelEntry channel;
4299 SilcUInt16 name_len;
4301 int i = *channel_users_modes_c;
4304 SILC_LOG_DEBUG(("Start"));
4306 /* Go through all channels in the list */
4307 if (silc_idcache_get_all(id_list->channels, &list)) {
4308 if (silc_idcache_list_first(list, &id_cache)) {
4310 channel = (SilcChannelEntry)id_cache->context;
4312 if (creation_time && channel->created < creation_time)
4317 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4318 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4319 name_len = strlen(channel->channel_name);
4322 len = 4 + name_len + id_len + 4;
4324 silc_buffer_realloc(*channels,
4325 (*channels ? (*channels)->truelen +
4327 silc_buffer_pull_tail(*channels,
4328 ((*channels)->end - (*channels)->data));
4329 silc_buffer_format(*channels,
4330 SILC_STR_UI_SHORT(name_len),
4331 SILC_STR_UI_XNSTRING(channel->channel_name,
4333 SILC_STR_UI_SHORT(id_len),
4334 SILC_STR_UI_XNSTRING(cid, id_len),
4335 SILC_STR_UI_INT(channel->mode),
4337 silc_buffer_pull(*channels, len);
4340 if (creation_time && channel->updated < creation_time)
4346 /* Channel user modes */
4347 *channel_users_modes = silc_realloc(*channel_users_modes,
4348 sizeof(**channel_users_modes) *
4350 (*channel_users_modes)[i] = NULL;
4351 *channel_modes = silc_realloc(*channel_modes,
4352 sizeof(**channel_modes) * (i + 1));
4353 (*channel_modes)[i] = NULL;
4354 *channel_ids = silc_realloc(*channel_ids,
4355 sizeof(**channel_ids) * (i + 1));
4356 (*channel_ids)[i] = NULL;
4357 silc_server_announce_get_channel_users(server, channel,
4358 &(*channel_modes)[i],
4360 &(*channel_users_modes)[i]);
4361 (*channel_ids)[i] = channel->id;
4363 /* Channel's topic */
4364 *channel_topics = silc_realloc(*channel_topics,
4365 sizeof(**channel_topics) * (i + 1));
4366 (*channel_topics)[i] = NULL;
4367 silc_server_announce_get_channel_topic(server, channel,
4368 &(*channel_topics)[i]);
4369 (*channel_users_modes_c)++;
4373 if (!silc_idcache_list_next(list, &id_cache))
4378 silc_idcache_list_free(list);
4382 /* This function is used to announce our existing channels to our router
4383 when we've connected to it. This also announces the users on the
4384 channels to the router. If the `creation_time' is non-zero only the
4385 channels that was created after the `creation_time' are announced.
4386 Note that the channel users are still announced even if the `creation_time'
4389 void silc_server_announce_channels(SilcServer server,
4390 unsigned long creation_time,
4391 SilcSocketConnection remote)
4393 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4394 SilcBuffer *channel_users_modes = NULL;
4395 SilcBuffer *channel_topics = NULL;
4396 SilcUInt32 channel_users_modes_c = 0;
4397 SilcChannelID **channel_ids = NULL;
4399 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4401 /* Get channels and channel users in local list */
4402 silc_server_announce_get_channels(server, server->local_list,
4403 &channels, &channel_modes,
4405 &channel_users_modes,
4406 &channel_users_modes_c,
4408 &channel_ids, creation_time);
4410 /* Get channels and channel users in global list */
4411 if (server->server_type != SILC_SERVER)
4412 silc_server_announce_get_channels(server, server->global_list,
4413 &channels, &channel_modes,
4415 &channel_users_modes,
4416 &channel_users_modes_c,
4418 &channel_ids, creation_time);
4421 silc_buffer_push(channels, channels->data - channels->head);
4422 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4424 /* Send the packet */
4425 silc_server_packet_send(server, remote,
4426 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4427 channels->data, channels->len,
4430 silc_buffer_free(channels);
4433 if (channel_users) {
4434 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4435 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4436 channel_users->len);
4438 /* Send the packet */
4439 silc_server_packet_send(server, remote,
4440 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4441 channel_users->data, channel_users->len,
4444 silc_buffer_free(channel_users);
4447 if (channel_modes) {
4450 for (i = 0; i < channel_users_modes_c; i++) {
4451 if (!channel_modes[i])
4453 silc_buffer_push(channel_modes[i],
4454 channel_modes[i]->data -
4455 channel_modes[i]->head);
4456 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4457 channel_modes[i]->len);
4458 silc_server_packet_send_dest(server, remote,
4459 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4460 channel_ids[i], SILC_ID_CHANNEL,
4461 channel_modes[i]->data,
4462 channel_modes[i]->len,
4464 silc_buffer_free(channel_modes[i]);
4466 silc_free(channel_modes);
4469 if (channel_users_modes) {
4472 for (i = 0; i < channel_users_modes_c; i++) {
4473 if (!channel_users_modes[i])
4475 silc_buffer_push(channel_users_modes[i],
4476 channel_users_modes[i]->data -
4477 channel_users_modes[i]->head);
4478 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4479 channel_users_modes[i]->len);
4480 silc_server_packet_send_dest(server, remote,
4481 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4482 channel_ids[i], SILC_ID_CHANNEL,
4483 channel_users_modes[i]->data,
4484 channel_users_modes[i]->len,
4486 silc_buffer_free(channel_users_modes[i]);
4488 silc_free(channel_users_modes);
4491 if (channel_topics) {
4494 for (i = 0; i < channel_users_modes_c; i++) {
4495 if (!channel_topics[i])
4498 silc_buffer_push(channel_topics[i],
4499 channel_topics[i]->data -
4500 channel_topics[i]->head);
4501 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4502 channel_topics[i]->len);
4503 silc_server_packet_send_dest(server, remote,
4504 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4505 channel_ids[i], SILC_ID_CHANNEL,
4506 channel_topics[i]->data,
4507 channel_topics[i]->len,
4509 silc_buffer_free(channel_topics[i]);
4511 silc_free(channel_topics);
4514 silc_free(channel_ids);
4517 /* Failure timeout callback. If this is called then we will immediately
4518 process the received failure. We always process the failure with timeout
4519 since we do not want to blindly trust to received failure packets.
4520 This won't be called (the timeout is cancelled) if the failure was
4521 bogus (it is bogus if remote does not close the connection after sending
4524 SILC_TASK_CALLBACK(silc_server_failure_callback)
4526 SilcServer server = app_context;
4527 SilcServerFailureContext f = (SilcServerFailureContext)context;
4529 if (f->sock->protocol) {
4530 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4531 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4534 silc_socket_free(f->sock);
4538 /* Assembles user list and users mode list from the `channel'. */
4540 bool silc_server_get_users_on_channel(SilcServer server,
4541 SilcChannelEntry channel,
4542 SilcBuffer *user_list,
4543 SilcBuffer *mode_list,
4544 SilcUInt32 *user_count)
4546 SilcChannelClientEntry chl;
4547 SilcHashTableList htl;
4548 SilcBuffer client_id_list;
4549 SilcBuffer client_mode_list;
4551 SilcUInt32 list_count = 0, len = 0;
4553 if (!silc_hash_table_count(channel->user_list))
4556 silc_hash_table_list(channel->user_list, &htl);
4557 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4558 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4559 silc_hash_table_list_reset(&htl);
4561 client_id_list = silc_buffer_alloc(len);
4563 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4564 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4565 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4567 silc_hash_table_list(channel->user_list, &htl);
4568 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4570 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4571 silc_buffer_put(client_id_list, idp->data, idp->len);
4572 silc_buffer_pull(client_id_list, idp->len);
4573 silc_buffer_free(idp);
4575 /* Client's mode on channel */
4576 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4577 silc_buffer_pull(client_mode_list, 4);
4581 silc_hash_table_list_reset(&htl);
4582 silc_buffer_push(client_id_list,
4583 client_id_list->data - client_id_list->head);
4584 silc_buffer_push(client_mode_list,
4585 client_mode_list->data - client_mode_list->head);
4587 *user_list = client_id_list;
4588 *mode_list = client_mode_list;
4589 *user_count = list_count;
4593 /* Saves users and their modes to the `channel'. */
4595 void silc_server_save_users_on_channel(SilcServer server,
4596 SilcSocketConnection sock,
4597 SilcChannelEntry channel,
4598 SilcClientID *noadd,
4599 SilcBuffer user_list,
4600 SilcBuffer mode_list,
4601 SilcUInt32 user_count)
4606 SilcClientID *client_id;
4607 SilcClientEntry client;
4608 SilcIDCacheEntry cache;
4609 SilcChannelClientEntry chl;
4611 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4612 channel->channel_name));
4614 for (i = 0; i < user_count; i++) {
4616 SILC_GET16_MSB(idp_len, user_list->data + 2);
4618 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4619 silc_buffer_pull(user_list, idp_len);
4624 SILC_GET32_MSB(mode, mode_list->data);
4625 silc_buffer_pull(mode_list, 4);
4627 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4628 silc_free(client_id);
4634 /* Check if we have this client cached already. */
4635 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4636 server->server_type, &cache);
4638 client = silc_idlist_find_client_by_id(server->global_list,
4639 client_id, server->server_type,
4642 /* If router did not find such Client ID in its lists then this must
4643 be bogus client or some router in the net is buggy. */
4644 if (server->server_type != SILC_SERVER) {
4645 silc_free(client_id);
4649 /* We don't have that client anywhere, add it. The client is added
4650 to global list since server didn't have it in the lists so it must be
4652 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4653 silc_id_dup(client_id, SILC_ID_CLIENT),
4654 sock->user_data, NULL, 0);
4656 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4657 silc_free(client_id);
4661 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4666 silc_free(client_id);
4668 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4669 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4670 "%s", channel->channel_name));
4674 if (!silc_server_client_on_channel(client, channel, &chl)) {
4675 /* Client was not on the channel, add it. */
4676 chl = silc_calloc(1, sizeof(*chl));
4677 chl->client = client;
4679 chl->channel = channel;
4680 silc_hash_table_add(channel->user_list, chl->client, chl);
4681 silc_hash_table_add(client->channels, chl->channel, chl);
4682 channel->user_count++;
4690 /* Saves channels and channels user modes to the `client'. Removes
4691 the client from those channels that are not sent in the list but
4694 void silc_server_save_user_channels(SilcServer server,
4695 SilcSocketConnection sock,
4696 SilcClientEntry client,
4697 SilcBuffer channels,
4698 SilcBuffer channels_user_modes)
4701 SilcUInt32 *chumodes;
4702 SilcChannelPayload entry;
4703 SilcChannelEntry channel;
4704 SilcChannelID *channel_id;
4705 SilcChannelClientEntry chl;
4706 SilcHashTable ht = NULL;
4707 SilcHashTableList htl;
4711 if (!channels || !channels_user_modes ||
4712 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4715 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4716 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4718 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4719 NULL, NULL, NULL, TRUE);
4720 silc_dlist_start(ch);
4721 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4722 /* Check if we have this channel, and add it if we don't have it.
4723 Also add the client on the channel unless it is there already. */
4724 channel_id = silc_channel_get_id_parse(entry);
4725 channel = silc_idlist_find_channel_by_id(server->local_list,
4728 channel = silc_idlist_find_channel_by_id(server->global_list,
4731 if (server->server_type != SILC_SERVER) {
4732 silc_free(channel_id);
4737 /* We don't have that channel anywhere, add it. */
4738 name = silc_channel_get_name(entry, NULL);
4739 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4740 channel_id, server->router,
4743 silc_free(channel_id);
4750 channel->mode = silc_channel_get_mode(entry);
4752 /* Add the client on the channel */
4753 if (!silc_server_client_on_channel(client, channel, &chl)) {
4754 chl = silc_calloc(1, sizeof(*chl));
4755 chl->client = client;
4756 chl->mode = chumodes[i++];
4757 chl->channel = channel;
4758 silc_hash_table_add(channel->user_list, chl->client, chl);
4759 silc_hash_table_add(client->channels, chl->channel, chl);
4760 channel->user_count++;
4763 chl->mode = chumodes[i++];
4766 silc_hash_table_add(ht, channel, channel);
4767 silc_free(channel_id);
4769 silc_channel_payload_list_free(ch);
4770 silc_free(chumodes);
4774 /* Go through the list again and remove client from channels that
4775 are no part of the list. */
4777 silc_hash_table_list(client->channels, &htl);
4778 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4779 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4780 silc_hash_table_del(chl->channel->user_list, chl->client);
4781 silc_hash_table_del(chl->client->channels, chl->channel);
4785 silc_hash_table_list_reset(&htl);
4786 silc_hash_table_free(ht);
4788 silc_hash_table_list(client->channels, &htl);
4789 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4790 silc_hash_table_del(chl->channel->user_list, chl->client);
4791 silc_hash_table_del(chl->client->channels, chl->channel);
4794 silc_hash_table_list_reset(&htl);
4798 /* Lookups route to the client indicated by the `id_data'. The connection
4799 object and internal data object is returned. Returns NULL if route
4800 could not be found to the client. If the `client_id' is specified then
4801 it is used and the `id_data' is ignored. */
4803 SilcSocketConnection
4804 silc_server_get_client_route(SilcServer server,
4805 unsigned char *id_data,
4807 SilcClientID *client_id,
4808 SilcIDListData *idata,
4809 SilcClientEntry *client_entry)
4812 SilcClientEntry client;
4814 SILC_LOG_DEBUG(("Start"));
4817 *client_entry = NULL;
4819 /* Decode destination Client ID */
4821 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4823 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4827 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4830 /* If the destination belongs to our server we don't have to route
4831 the packet anywhere but to send it to the local destination. */
4832 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4836 /* If we are router and the client has router then the client is in
4837 our cell but not directly connected to us. */
4838 if (server->server_type == SILC_ROUTER && client->router) {
4839 /* We are of course in this case the client's router thus the route
4840 to the client is the server who owns the client. So, we will send
4841 the packet to that server. */
4843 *idata = (SilcIDListData)client->router;
4844 return client->router->connection;
4847 /* Seems that client really is directly connected to us */
4849 *idata = (SilcIDListData)client;
4851 *client_entry = client;
4852 return client->connection;
4855 /* Destination belongs to someone not in this server. If we are normal
4856 server our action is to send the packet to our router. */
4857 if (server->server_type != SILC_ROUTER && !server->standalone) {
4860 *idata = (SilcIDListData)server->router;
4861 return SILC_PRIMARY_ROUTE(server);
4864 /* We are router and we will perform route lookup for the destination
4865 and send the packet to fastest route. */
4866 if (server->server_type == SILC_ROUTER && !server->standalone) {
4867 /* Check first that the ID is valid */
4868 client = silc_idlist_find_client_by_id(server->global_list, id,
4871 SilcSocketConnection dst_sock;
4873 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4877 *idata = (SilcIDListData)dst_sock->user_data;
4886 /* Encodes and returns channel list of channels the `client' has joined.
4887 Secret channels are not put to the list. */
4889 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4890 SilcClientEntry client,
4893 SilcBuffer *user_mode_list)
4895 SilcBuffer buffer = NULL;
4896 SilcChannelEntry channel;
4897 SilcChannelClientEntry chl;
4898 SilcHashTableList htl;
4901 SilcUInt16 name_len;
4905 *user_mode_list = NULL;
4907 silc_hash_table_list(client->channels, &htl);
4908 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4909 channel = chl->channel;
4911 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4913 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4916 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4917 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4918 name_len = strlen(channel->channel_name);
4920 len = 4 + name_len + id_len + 4;
4921 buffer = silc_buffer_realloc(buffer,
4922 (buffer ? buffer->truelen + len : len));
4923 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4924 silc_buffer_format(buffer,
4925 SILC_STR_UI_SHORT(name_len),
4926 SILC_STR_UI_XNSTRING(channel->channel_name,
4928 SILC_STR_UI_SHORT(id_len),
4929 SILC_STR_UI_XNSTRING(cid, id_len),
4930 SILC_STR_UI_INT(chl->channel->mode),
4932 silc_buffer_pull(buffer, len);
4935 if (user_mode_list) {
4936 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4938 (*user_mode_list)->truelen + 4 :
4940 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4941 (*user_mode_list)->data));
4942 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4943 silc_buffer_pull(*user_mode_list, 4);
4946 silc_hash_table_list_reset(&htl);
4949 silc_buffer_push(buffer, buffer->data - buffer->head);
4950 if (user_mode_list && *user_mode_list)
4951 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4952 (*user_mode_list)->head));
4957 /* A timeout callback for the re-key. We will be the initiator of the
4960 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4962 SilcServer server = app_context;
4963 SilcSocketConnection sock = (SilcSocketConnection)context;
4964 SilcIDListData idata = (SilcIDListData)sock->user_data;
4965 SilcProtocol protocol;
4966 SilcServerRekeyInternalContext *proto_ctx;
4968 /* Allocate internal protocol context. This is sent as context
4970 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4971 proto_ctx->server = (void *)server;
4972 proto_ctx->sock = sock;
4973 proto_ctx->responder = FALSE;
4974 proto_ctx->pfs = idata->rekey->pfs;
4976 /* Perform rekey protocol. Will call the final callback after the
4977 protocol is over. */
4978 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4979 &protocol, proto_ctx, silc_server_rekey_final);
4980 sock->protocol = protocol;
4982 /* Run the protocol */
4983 silc_protocol_execute(protocol, server->schedule, 0, 0);
4985 SILC_LOG_DEBUG(("Rekey protocol completed"));
4987 /* Re-register re-key timeout */
4988 silc_schedule_task_add(server->schedule, sock->sock,
4989 silc_server_rekey_callback,
4990 context, idata->rekey->timeout, 0,
4991 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4994 /* The final callback for the REKEY protocol. This will actually take the
4995 new key material into use. */
4997 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4999 SilcProtocol protocol = (SilcProtocol)context;
5000 SilcServerRekeyInternalContext *ctx =
5001 (SilcServerRekeyInternalContext *)protocol->context;
5002 SilcServer server = (SilcServer)ctx->server;
5003 SilcSocketConnection sock = ctx->sock;
5005 SILC_LOG_DEBUG(("Start"));
5007 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5008 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5009 /* Error occured during protocol */
5010 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5011 silc_protocol_cancel(protocol, server->schedule);
5012 silc_protocol_free(protocol);
5013 sock->protocol = NULL;
5015 silc_packet_context_free(ctx->packet);
5017 silc_ske_free(ctx->ske);
5022 /* Purge the outgoing data queue to assure that all rekey packets really
5023 go to the network before we quit the protocol. */
5024 silc_server_packet_queue_purge(server, sock);
5027 silc_protocol_free(protocol);
5028 sock->protocol = NULL;
5030 silc_packet_context_free(ctx->packet);
5032 silc_ske_free(ctx->ske);
5036 /* Task callback used to retrieve network statistical information from
5037 router server once in a while. */
5039 SILC_TASK_CALLBACK(silc_server_get_stats)
5041 SilcServer server = (SilcServer)context;
5042 SilcBuffer idp, packet;
5044 SILC_LOG_DEBUG(("Retrieving stats from router"));
5046 if (!server->standalone) {
5047 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5048 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5049 ++server->cmd_ident, 1,
5050 1, idp->data, idp->len);
5051 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5052 SILC_PACKET_COMMAND, 0, packet->data,
5053 packet->len, FALSE);
5054 silc_buffer_free(packet);
5055 silc_buffer_free(idp);
5058 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5059 server, 120, 0, SILC_TASK_TIMEOUT,