5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005 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_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_close_connection_final);
41 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
42 SILC_TASK_CALLBACK(silc_server_timeout_remote);
43 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
44 SILC_TASK_CALLBACK(silc_server_get_stats);
45 SILC_TASK_CALLBACK(silc_server_connect_router);
47 /* Allocates a new SILC server object. This has to be done before the server
48 can be used. After allocation one must call silc_server_init to initialize
49 the server. The new allocated server object is returned to the new_server
52 int silc_server_alloc(SilcServer *new_server)
56 SILC_LOG_DEBUG(("Allocating new server object"));
58 server = silc_calloc(1, sizeof(*server));
59 server->server_type = SILC_SERVER;
60 server->standalone = TRUE;
61 server->local_list = silc_calloc(1, sizeof(*server->local_list));
62 server->global_list = silc_calloc(1, sizeof(*server->global_list));
63 server->pending_commands = silc_dlist_init();
65 server->sim = silc_dlist_init();
73 /* Free's the SILC server object. This is called at the very end before
76 void silc_server_free(SilcServer server)
79 SilcIDCacheEntry cache;
87 silc_dlist_start(server->sim);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
93 silc_dlist_uninit(server->sim);
97 silc_server_backup_free(server);
98 silc_server_config_unref(&server->config_ref);
100 silc_rng_free(server->rng);
102 silc_pkcs_free(server->pkcs);
103 if (server->public_key)
104 silc_pkcs_public_key_free(server->public_key);
105 if (server->private_key)
106 silc_pkcs_private_key_free(server->private_key);
107 if (server->pending_commands)
108 silc_dlist_uninit(server->pending_commands);
109 if (server->id_entry)
110 silc_idlist_del_server(server->local_list, server->id_entry);
112 /* Delete all channels */
114 if (silc_idcache_get_all(server->local_list->channels, &list) &&
115 silc_idcache_list_first(list, &cache)) {
116 silc_idlist_del_channel(server->local_list, cache->context);
117 while (silc_idcache_list_next(list, &cache))
118 silc_idlist_del_channel(server->local_list, cache->context);
121 silc_idcache_list_free(list);
123 if (silc_idcache_get_all(server->global_list->channels, &list) &&
124 silc_idcache_list_first(list, &cache)) {
125 silc_idlist_del_channel(server->global_list, cache->context);
126 while (silc_idcache_list_next(list, &cache))
127 silc_idlist_del_channel(server->global_list, cache->context);
130 silc_idcache_list_free(list);
133 silc_hash_table_free(server->pk_hash);
135 /* Delete all clients */
137 if (silc_idcache_get_all(server->local_list->clients, &list) &&
138 silc_idcache_list_first(list, &cache)) {
139 silc_idlist_del_client(server->local_list, cache->context);
140 while (silc_idcache_list_next(list, &cache))
141 silc_idlist_del_client(server->local_list, cache->context);
144 silc_idcache_list_free(list);
146 if (silc_idcache_get_all(server->global_list->clients, &list) &&
147 silc_idcache_list_first(list, &cache)) {
148 silc_idlist_del_client(server->global_list, cache->context);
149 while (silc_idcache_list_next(list, &cache))
150 silc_idlist_del_client(server->global_list, cache->context);
153 silc_idcache_list_free(list);
156 /* Delete all servers */
158 if (silc_idcache_get_all(server->local_list->servers, &list) &&
159 silc_idcache_list_first(list, &cache)) {
160 silc_idlist_del_server(server->local_list, cache->context);
161 while (silc_idcache_list_next(list, &cache))
162 silc_idlist_del_server(server->local_list, cache->context);
165 silc_idcache_list_free(list);
167 if (silc_idcache_get_all(server->global_list->servers, &list) &&
168 silc_idcache_list_first(list, &cache)) {
169 silc_idlist_del_server(server->global_list, cache->context);
170 while (silc_idcache_list_next(list, &cache))
171 silc_idlist_del_server(server->global_list, cache->context);
174 silc_idcache_list_free(list);
176 silc_idcache_free(server->local_list->clients);
177 silc_idcache_free(server->local_list->servers);
178 silc_idcache_free(server->local_list->channels);
179 silc_idcache_free(server->global_list->clients);
180 silc_idcache_free(server->global_list->servers);
181 silc_idcache_free(server->global_list->channels);
182 silc_hash_table_free(server->watcher_list);
183 silc_hash_table_free(server->watcher_list_pk);
185 silc_hash_free(server->md5hash);
186 silc_hash_free(server->sha1hash);
187 silc_hmac_unregister_all();
188 silc_hash_unregister_all();
189 silc_cipher_unregister_all();
190 silc_pkcs_unregister_all();
192 silc_free(server->local_list);
193 silc_free(server->global_list);
194 silc_free(server->server_name);
195 silc_free(server->id_string);
196 silc_free(server->purge_i);
197 silc_free(server->purge_g);
201 /* Creates a new server listener. */
203 static bool silc_server_listen(SilcServer server, const char *server_ip,
204 SilcUInt16 port, int *sock)
206 *sock = silc_net_create_server(port, server_ip);
208 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
215 /* Adds a secondary listener. */
217 bool silc_server_init_secondary(SilcServer server)
219 int sock = 0, sock_list[server->config->param.connections_max];
220 SilcSocketConnection newsocket = NULL;
221 SilcServerConfigServerInfoInterface *interface;
223 for (interface = server->config->server_info->secondary; interface;
224 interface = interface->next, sock++) {
226 if (!silc_server_listen(server,
227 interface->server_ip, interface->port, &sock_list[sock]))
230 /* Set socket to non-blocking mode */
231 silc_net_set_socket_nonblock(sock_list[sock]);
233 /* Add ourselves also to the socket table. The entry allocated above
234 is sent as argument for fast referencing in the future. */
235 silc_socket_alloc(sock_list[sock],
236 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
237 server->sockets[sock_list[sock]] = newsocket;
238 SILC_SET_LISTENER(newsocket);
240 /* Perform name and address lookups to resolve the listenning address
242 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
244 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
246 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
247 newsocket->hostname ? newsocket->hostname :
248 newsocket->ip ? newsocket->ip : ""));
249 server->stat.conn_failures++;
252 if (!newsocket->hostname)
253 newsocket->hostname = strdup(newsocket->ip);
255 newsocket->port = silc_net_get_local_port(sock);
257 newsocket->user_data = (void *)server->id_entry;
258 silc_schedule_task_add(server->schedule, sock_list[sock],
259 silc_server_accept_new_connection,
260 (void *)server, 0, 0,
262 SILC_TASK_PRI_NORMAL);
268 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
272 /* Initializes the entire SILC server. This is called always before running
273 the server. This is called only once at the initialization of the program.
274 This binds the server to its listenning port. After this function returns
275 one should call silc_server_run to start the server. This returns TRUE
276 when everything is ok to run the server. Configuration file must be
277 read and parsed before calling this. */
279 bool silc_server_init(SilcServer server)
283 SilcServerEntry id_entry;
284 SilcIDListPurge purge;
285 SilcSocketConnection newsocket = NULL;
287 SILC_LOG_DEBUG(("Initializing server"));
289 server->starttime = time(NULL);
291 /* Take config object for us */
292 silc_server_config_ref(&server->config_ref, server->config,
296 /* Set debugging on if configured */
297 if (server->config->debug_string) {
299 silc_log_set_debug_string(server->config->debug_string);
301 #endif /* SILC_DEBUG */
303 /* Steal public and private key from the config object */
304 server->public_key = server->config->server_info->public_key;
305 server->private_key = server->config->server_info->private_key;
306 server->config->server_info->public_key = NULL;
307 server->config->server_info->private_key = NULL;
309 /* Register all configured ciphers, PKCS and hash functions. */
310 if (!silc_server_config_register_ciphers(server))
311 silc_cipher_register_default();
312 if (!silc_server_config_register_pkcs(server))
313 silc_pkcs_register_default();
314 if (!silc_server_config_register_hashfuncs(server))
315 silc_hash_register_default();
316 if (!silc_server_config_register_hmacs(server))
317 silc_hmac_register_default();
319 /* Initialize random number generator for the server. */
320 server->rng = silc_rng_alloc();
321 silc_rng_init(server->rng);
322 silc_rng_global_init(server->rng);
324 /* Initialize hash functions for server to use */
325 silc_hash_alloc("md5", &server->md5hash);
326 silc_hash_alloc("sha1", &server->sha1hash);
328 /* Allocate PKCS context for local public and private keys */
329 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
331 silc_pkcs_public_key_set(server->pkcs, server->public_key);
332 silc_pkcs_private_key_set(server->pkcs, server->private_key);
334 /* Initialize the scheduler */
335 server->schedule = silc_schedule_init(server->config->param.connections_max,
337 if (!server->schedule)
340 /* First, register log files configuration for error output */
341 silc_server_config_setlogfiles(server);
343 /* Initialize ID caches */
344 server->local_list->clients =
345 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
347 server->local_list->servers =
348 silc_idcache_alloc(0, SILC_ID_SERVER, NULL, FALSE, TRUE);
349 server->local_list->channels =
350 silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL, FALSE, TRUE);
352 /* These are allocated for normal server as well as these hold some
353 global information that the server has fetched from its router. For
354 router these are used as they are supposed to be used on router. */
355 server->global_list->clients =
356 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
358 server->global_list->servers =
359 silc_idcache_alloc(0, SILC_ID_SERVER, NULL, FALSE, TRUE);
360 server->global_list->channels =
361 silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL, FALSE, TRUE);
363 /* Init watcher lists */
364 server->watcher_list =
365 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
366 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
368 if (!server->watcher_list)
370 server->watcher_list_pk =
371 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
372 silc_hash_public_key_compare, NULL,
374 if (!server->watcher_list_pk)
377 /* Init public key list */
379 silc_hash_table_alloc(0, silc_hash_public_key, NULL,
380 silc_hash_public_key_compare, NULL,
383 if (!server->pk_hash)
386 /* Create a listening server */
387 if (!silc_server_listen(server,
388 server->config->server_info->primary == NULL ? NULL :
389 server->config->server_info->primary->server_ip,
390 server->config->server_info->primary == NULL ? 0 :
391 server->config->server_info->primary->port,
395 /* Set socket to non-blocking mode */
396 silc_net_set_socket_nonblock(sock);
399 /* Allocate the entire socket list that is used in server. Eventually
400 all connections will have entry in this table (it is a table of
401 pointers to the actual object that is allocated individually
403 server->sockets = silc_calloc(server->config->param.connections_max,
404 sizeof(*server->sockets));
405 if (!server->sockets)
408 /* Add ourselves also to the socket table. The entry allocated above
409 is sent as argument for fast referencing in the future. */
410 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
411 server->sockets[sock] = newsocket;
412 SILC_SET_LISTENER(newsocket);
414 /* Perform name and address lookups to resolve the listenning address
416 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
418 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
420 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
421 newsocket->hostname ? newsocket->hostname :
422 newsocket->ip ? newsocket->ip : ""));
423 server->stat.conn_failures++;
426 if (!newsocket->hostname)
427 newsocket->hostname = strdup(newsocket->ip);
429 newsocket->port = silc_net_get_local_port(sock);
431 /* Create a Server ID for the server. */
432 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
437 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
438 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
439 server->server_name = server->config->server_info->server_name;
440 server->config->server_info->server_name = NULL;
442 /* Add ourselves to the server list. We don't have a router yet
443 beacuse we haven't established a route yet. It will be done later.
444 For now, NULL is sent as router. This allocates new entry to
447 silc_idlist_add_server(server->local_list, strdup(server->server_name),
448 server->server_type, server->id, NULL, NULL);
450 SILC_LOG_ERROR(("Could not add ourselves to cache"));
453 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
455 /* Put the allocated socket pointer also to the entry allocated above
456 for fast back-referencing to the socket list. */
457 newsocket->user_data = (void *)id_entry;
458 id_entry->connection = (void *)newsocket;
459 server->id_entry = id_entry;
461 /* Register protocols */
462 silc_server_protocols_register();
464 /* Create connections to configured routers. */
465 silc_server_create_connections(server);
467 /* Add listener task to the scheduler. This task receives new connections
468 to the server. This task remains on the queue until the end of the
470 silc_schedule_task_add(server->schedule, sock,
471 silc_server_accept_new_connection,
472 (void *)server, 0, 0,
474 SILC_TASK_PRI_NORMAL);
476 if (silc_server_init_secondary(server) == FALSE)
479 server->listenning = TRUE;
481 /* If server connections has been configured then we must be router as
482 normal server cannot have server connections, only router connections. */
483 if (server->config->servers) {
484 SilcServerConfigServer *ptr = server->config->servers;
486 server->server_type = SILC_ROUTER;
488 if (ptr->backup_router) {
489 server->server_type = SILC_BACKUP_ROUTER;
490 server->backup_router = TRUE;
491 server->id_entry->server_type = SILC_BACKUP_ROUTER;
498 /* Register the ID Cache purge task. This periodically purges the ID cache
499 and removes the expired cache entries. */
501 /* Clients local list */
502 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
503 purge->cache = server->local_list->clients;
504 purge->timeout = 600;
505 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
506 (void *)purge, purge->timeout, 0,
507 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
509 /* Clients global list */
510 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
511 purge->cache = server->global_list->clients;
512 purge->timeout = 300;
513 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
514 (void *)purge, purge->timeout, 0,
515 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
517 /* If we are normal server we'll retrieve network statisticial information
518 once in a while from the router. */
519 if (server->server_type != SILC_ROUTER)
520 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
521 server, 10, 0, SILC_TASK_TIMEOUT,
524 if (server->server_type == SILC_ROUTER)
525 server->stat.routers++;
527 SILC_LOG_DEBUG(("Server initialized"));
529 /* We are done here, return succesfully */
533 silc_server_config_unref(&server->config_ref);
534 silc_net_close_server(sock);
538 /* Task callback to close a socket connection after rehash */
540 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
542 SilcServer server = context;
543 SilcSocketConnection sock = server->sockets[fd];
548 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
549 sock->hostname, sock->port,
550 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
551 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
552 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
554 silc_schedule_task_del_by_context(server->schedule, sock);
555 silc_server_disconnect_remote(server, sock,
556 SILC_STATUS_ERR_BANNED_FROM_SERVER,
557 "This connection is removed from "
560 silc_server_free_sock_user_data(server, sock, NULL);
563 /* This function basically reads the config file again and switches the config
564 object pointed by the server object. After that, we have to fix various
565 things such as the server_name and the listening ports.
566 Keep in mind that we no longer have the root privileges at this point. */
568 bool silc_server_rehash(SilcServer server)
570 SilcServerConfig newconfig;
572 SILC_LOG_INFO(("Rehashing server"));
574 /* Reset the logging system */
575 silc_log_quick = TRUE;
576 silc_log_flush_all();
578 /* Start the main rehash phase (read again the config file) */
579 newconfig = silc_server_config_alloc(server->config_file);
581 SILC_LOG_ERROR(("Rehash FAILED."));
585 /* Reinit scheduler if necessary */
586 if (newconfig->param.connections_max > server->config->param.connections_max)
587 if (!silc_schedule_reinit(server->schedule,
588 newconfig->param.connections_max))
591 /* Fix the server_name field */
592 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
593 silc_free(server->server_name);
595 /* Check server name */
596 server->server_name =
597 silc_identifier_check(newconfig->server_info->server_name,
598 strlen(newconfig->server_info->server_name),
599 SILC_STRING_LOCALE, 256, NULL);
600 if (!server->server_name) {
601 SILC_LOG_ERROR(("Malformed server name string '%s'",
602 server->config->server_info->server_name));
606 /* Update the idcache list with a fresh pointer */
607 silc_free(server->id_entry->server_name);
608 server->id_entry->server_name = strdup(server->server_name);
609 if (!silc_idcache_del_by_context(server->local_list->servers,
612 if (!silc_idcache_add(server->local_list->servers,
613 strdup(server->id_entry->server_name),
614 server->id_entry->id, server->id_entry, 0, NULL))
619 silc_server_config_setlogfiles(server);
621 /* Change new key pair if necessary */
622 if (newconfig->server_info->public_key &&
623 !silc_pkcs_public_key_compare(server->public_key,
624 newconfig->server_info->public_key)) {
625 silc_pkcs_public_key_free(server->public_key);
626 silc_pkcs_private_key_free(server->private_key);
627 server->public_key = newconfig->server_info->public_key;
628 server->private_key = newconfig->server_info->private_key;
629 newconfig->server_info->public_key = NULL;
630 newconfig->server_info->private_key = NULL;
632 /* Allocate PKCS context for local public and private keys */
633 silc_pkcs_free(server->pkcs);
634 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
636 silc_pkcs_public_key_set(server->pkcs, server->public_key);
637 silc_pkcs_private_key_set(server->pkcs, server->private_key);
640 /* Check for unconfigured server and router connections and close
641 connections that were unconfigured. */
643 if (server->config->routers) {
644 SilcServerConfigRouter *ptr;
645 SilcServerConfigRouter *newptr;
648 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
651 /* Check whether new config has this one too */
652 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
653 if (silc_string_compare(newptr->host, ptr->host) &&
654 newptr->port == ptr->port &&
655 newptr->initiator == ptr->initiator) {
661 if (!found && ptr->host) {
662 /* Remove this connection */
663 SilcSocketConnection sock;
664 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
665 ptr->host, ptr->port);
666 if (sock && !SILC_IS_LISTENER(sock))
667 silc_schedule_task_add(server->schedule, sock->sock,
668 silc_server_rehash_close_connection,
669 server, 0, 1, SILC_TASK_TIMEOUT,
670 SILC_TASK_PRI_NORMAL);
675 if (server->config->servers) {
676 SilcServerConfigServer *ptr;
677 SilcServerConfigServer *newptr;
680 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
683 /* Check whether new config has this one too */
684 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
685 if (silc_string_compare(newptr->host, ptr->host)) {
691 if (!found && ptr->host) {
692 /* Remove this connection */
693 SilcSocketConnection sock;
694 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
696 if (sock && !SILC_IS_LISTENER(sock))
697 silc_schedule_task_add(server->schedule, sock->sock,
698 silc_server_rehash_close_connection,
699 server, 0, 1, SILC_TASK_TIMEOUT,
700 SILC_TASK_PRI_NORMAL);
705 if (server->config->clients) {
706 SilcServerConfigClient *ptr;
707 SilcServerConfigClient *newptr;
710 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
713 /* Check whether new config has this one too */
714 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
715 if (silc_string_compare(newptr->host, ptr->host)) {
721 if (!found && ptr->host) {
722 /* Remove this connection */
723 SilcSocketConnection sock;
724 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
727 silc_schedule_task_add(server->schedule, sock->sock,
728 silc_server_rehash_close_connection,
729 server, 0, 1, SILC_TASK_TIMEOUT,
730 SILC_TASK_PRI_NORMAL);
735 /* Create connections after rehash */
736 silc_server_create_connections(server);
738 /* Check whether our router status has changed */
739 if (newconfig->servers) {
740 SilcServerConfigServer *ptr = newconfig->servers;
742 server->server_type = SILC_ROUTER;
744 if (ptr->backup_router) {
745 server->server_type = SILC_BACKUP_ROUTER;
746 server->backup_router = TRUE;
747 server->id_entry->server_type = SILC_BACKUP_ROUTER;
754 /* Our old config is gone now. We'll unreference our reference made in
755 silc_server_init and then destroy it since we are destroying it
756 underneath the application (layer which called silc_server_init). */
757 silc_server_config_unref(&server->config_ref);
758 silc_server_config_destroy(server->config);
760 /* Take new config context */
761 server->config = newconfig;
762 silc_server_config_ref(&server->config_ref, server->config, server->config);
765 /* Set debugging on if configured */
766 if (server->config->debug_string) {
768 silc_log_set_debug_string(server->config->debug_string);
770 #endif /* SILC_DEBUG */
772 SILC_LOG_DEBUG(("Server rehashed"));
777 /* The heart of the server. This runs the scheduler thus runs the server.
778 When this returns the server has been stopped and the program will
781 void silc_server_run(SilcServer server)
783 SILC_LOG_INFO(("SILC Server started"));
785 /* Start the scheduler, the heart of the SILC server. When this returns
786 the program will be terminated. */
787 silc_schedule(server->schedule);
790 /* Stops the SILC server. This function is used to shutdown the server.
791 This is usually called after the scheduler has returned. After stopping
792 the server one should call silc_server_free. */
794 void silc_server_stop(SilcServer server)
796 SILC_LOG_INFO(("SILC Server shutting down"));
798 if (server->schedule) {
801 server->server_shutdown = TRUE;
803 /* Close all connections */
804 for (i = 0; i < server->config->param.connections_max; i++) {
805 if (!server->sockets[i])
807 if (!SILC_IS_LISTENER(server->sockets[i])) {
808 SilcSocketConnection sock = server->sockets[i];
809 SilcIDListData idata = sock->user_data;
812 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
814 silc_schedule_task_del_by_context(server->schedule,
816 silc_schedule_task_del_by_fd(server->schedule,
817 server->sockets[i]->sock);
818 silc_server_disconnect_remote(server, server->sockets[i],
820 "Server is shutting down");
821 if (server->sockets[i]) {
823 silc_server_free_sock_user_data(server, sock,
824 "Server is shutting down");
825 silc_socket_free(sock);
828 silc_socket_free(server->sockets[i]);
829 server->sockets[i] = NULL;
830 server->stat.conn_num--;
834 /* We are not connected to network anymore */
835 server->standalone = TRUE;
837 silc_schedule_stop(server->schedule);
838 silc_schedule_uninit(server->schedule);
839 server->schedule = NULL;
841 silc_free(server->sockets);
842 server->sockets = NULL;
845 silc_server_protocols_unregister();
847 SILC_LOG_DEBUG(("Server stopped"));
850 /* Function that is called when the network connection to a router has
851 been established. This will continue with the key exchange protocol
852 with the remote router. */
854 void silc_server_start_key_exchange(SilcServer server,
855 SilcServerConnection sconn,
858 SilcSocketConnection newsocket;
859 SilcProtocol protocol;
860 SilcServerKEInternalContext *proto_ctx;
861 SilcServerConfigRouter *conn =
862 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
865 /* Cancel any possible retry timeouts */
866 silc_schedule_task_del_by_callback(server->schedule,
867 silc_server_connect_to_router_retry);
869 /* Set socket options */
870 silc_net_set_socket_nonblock(sock);
871 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
873 /* Create socket connection for the connection. Even though we
874 know that we are connecting to a router we will mark the socket
875 to be unknown connection until we have executed authentication
877 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
878 server->sockets[sock] = newsocket;
879 newsocket->hostname = strdup(sconn->remote_host);
880 newsocket->ip = strdup(sconn->remote_host);
881 newsocket->port = sconn->remote_port;
882 sconn->sock = newsocket;
884 /* Allocate internal protocol context. This is sent as context
886 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
887 proto_ctx->server = (void *)server;
888 proto_ctx->context = (void *)sconn;
889 proto_ctx->sock = newsocket;
890 proto_ctx->rng = server->rng;
891 proto_ctx->responder = FALSE;
893 /* Set Key Exchange flags from configuration, but fall back to global
895 SILC_GET_SKE_FLAGS(conn, proto_ctx);
896 if (server->config->param.key_exchange_pfs)
897 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
899 /* Perform key exchange protocol. silc_server_connect_to_router_second
900 will be called after the protocol is finished. */
901 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
902 &protocol, proto_ctx,
903 silc_server_connect_to_router_second);
904 newsocket->protocol = protocol;
906 /* Register a timeout task that will be executed if the protocol
907 is not executed within set limit. */
908 proto_ctx->timeout_task =
909 silc_schedule_task_add(server->schedule, sock,
910 silc_server_timeout_remote,
911 server, server->config->key_exchange_timeout, 0,
915 /* Register the connection for network input and output. This sets
916 that scheduler will listen for incoming packets for this connection
917 and sets that outgoing packets may be sent to this connection as
918 well. However, this doesn't set the scheduler for outgoing traffic,
919 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
920 later when outgoing data is available. */
921 context = (void *)server;
922 SILC_REGISTER_CONNECTION_FOR_IO(sock);
924 /* Run the protocol */
925 silc_protocol_execute(protocol, server->schedule, 0, 0);
928 /* Timeout callback that will be called to retry connecting to remote
929 router. This is used by both normal and router server. This will wait
930 before retrying the connecting. The timeout is generated by exponential
931 backoff algorithm. */
933 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
935 SilcServer server = app_context;
936 SilcServerConnection sconn = (SilcServerConnection)context;
937 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
938 SilcServerConfigConnParams *param =
939 (conn->param ? conn->param : &server->config->param);
941 /* Don't retry if we are shutting down. */
942 if (server->server_shutdown) {
943 silc_server_config_unref(&sconn->conn);
944 silc_free(sconn->remote_host);
945 silc_free(sconn->backup_replace_ip);
950 SILC_LOG_INFO(("Retrying connecting to a router"));
952 /* Calculate next timeout */
953 if (sconn->retry_count >= 1) {
954 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
955 if (sconn->retry_timeout > param->reconnect_interval_max)
956 sconn->retry_timeout = param->reconnect_interval_max;
958 sconn->retry_timeout = param->reconnect_interval;
960 sconn->retry_count++;
961 sconn->retry_timeout = sconn->retry_timeout +
962 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
964 /* If we've reached max retry count, give up. */
965 if ((sconn->retry_count > param->reconnect_count) &&
966 !param->reconnect_keep_trying) {
967 SILC_LOG_ERROR(("Could not connect to router, giving up"));
968 silc_server_config_unref(&sconn->conn);
969 silc_free(sconn->remote_host);
970 silc_free(sconn->backup_replace_ip);
975 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
976 sconn->retry_timeout));
978 /* We will lookup a fresh pointer later */
979 silc_server_config_unref(&sconn->conn);
981 /* Wait one before retrying */
982 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
983 context, sconn->retry_timeout, 0,
984 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
987 /* Callback for async connection to remote router */
989 SILC_TASK_CALLBACK(silc_server_connection_established)
991 SilcServer server = app_context;
992 SilcServerConnection sconn = (SilcServerConnection)context;
994 int opt = EINVAL, optlen = sizeof(opt), ret;
996 ret = silc_net_get_socket_opt(sock, SOL_SOCKET, SO_ERROR, &opt, &optlen);
998 silc_schedule_task_del_by_fd(server->schedule, sock);
999 silc_schedule_unset_listen_fd(server->schedule, sock);
1001 if (ret != 0 || opt != 0) {
1002 SILC_LOG_ERROR(("Could not connect to router %s:%d: %s",
1003 sconn->remote_host, sconn->remote_port, strerror(opt)));
1004 silc_net_close_connection(sock);
1005 if (!sconn->no_reconnect) {
1006 silc_schedule_task_add(server->schedule, 0,
1007 silc_server_connect_to_router_retry,
1008 context, 1, 0, SILC_TASK_TIMEOUT,
1009 SILC_TASK_PRI_NORMAL);
1011 silc_server_config_unref(&sconn->conn);
1012 silc_free(sconn->remote_host);
1013 silc_free(sconn->backup_replace_ip);
1019 SILC_LOG_DEBUG(("Connection to router %s:%d established", sconn->remote_host,
1020 sconn->remote_port));
1022 /* Continue with key exchange protocol */
1023 silc_server_start_key_exchange(server, sconn, sock);
1026 /* Generic routine to use connect to a router. */
1028 SILC_TASK_CALLBACK(silc_server_connect_router)
1030 SilcServer server = app_context;
1031 SilcServerConnection sconn = (SilcServerConnection)context;
1032 SilcServerConfigRouter *rconn;
1035 /* Don't connect if we are shutting down. */
1036 if (server->server_shutdown) {
1037 silc_free(sconn->remote_host);
1038 silc_free(sconn->backup_replace_ip);
1043 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1044 (sconn->backup ? "backup router" : "router"),
1045 sconn->remote_host, sconn->remote_port));
1047 server->router_connect = time(NULL);
1048 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1049 sconn->remote_port);
1051 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1052 (sconn->backup ? "backup router" : "router"),
1053 sconn->remote_host, sconn->remote_port));
1054 silc_free(sconn->remote_host);
1055 silc_free(sconn->backup_replace_ip);
1059 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1061 /* Connect to remote host */
1062 sock = silc_net_create_connection_async(
1063 (!server->config->server_info->primary ? NULL :
1064 server->config->server_info->primary->server_ip),
1065 sconn->remote_port, sconn->remote_host);
1067 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1068 sconn->remote_host, sconn->remote_port));
1069 if (!sconn->no_reconnect) {
1070 silc_schedule_task_add(server->schedule, 0,
1071 silc_server_connect_to_router_retry,
1072 context, 1, 0, SILC_TASK_TIMEOUT,
1073 SILC_TASK_PRI_NORMAL);
1075 silc_server_config_unref(&sconn->conn);
1076 silc_free(sconn->remote_host);
1077 silc_free(sconn->backup_replace_ip);
1083 /* wait for the connection to be established */
1084 silc_schedule_task_add(server->schedule, sock,
1085 silc_server_connection_established,
1086 context, 0, 0, SILC_TASK_FD,
1087 SILC_TASK_PRI_NORMAL);
1088 silc_schedule_set_listen_fd(server->schedule, sock,
1089 SILC_TASK_WRITE, FALSE);
1092 /* This function connects to our primary router or if we are a router this
1093 establishes all our primary routes. This is called at the start of the
1094 server to do authentication and key exchange with our router - called
1097 SILC_TASK_CALLBACK_GLOBAL(silc_server_connect_to_router)
1099 SilcServer server = (SilcServer)context;
1100 SilcServerConnection sconn;
1101 SilcServerConfigRouter *ptr;
1103 /* Don't connect if we are shutting down. */
1104 if (server->server_shutdown)
1107 SILC_LOG_DEBUG(("We are %s",
1108 (server->server_type == SILC_SERVER ?
1109 "normal server" : server->server_type == SILC_ROUTER ?
1110 "router" : "backup router/normal server")));
1112 if (!server->config->routers) {
1113 /* There wasn't a configured router, we will continue but we don't
1114 have a connection to outside world. We will be standalone server. */
1115 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1116 server->standalone = TRUE;
1120 /* Cancel any possible retry timeouts */
1121 silc_schedule_task_del_by_callback(server->schedule,
1122 silc_server_connect_router);
1123 silc_schedule_task_del_by_callback(server->schedule,
1124 silc_server_connect_to_router_retry);
1126 /* Create the connections to all our routes */
1127 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1129 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1130 ptr->backup_router ? "Backup router" : "Router",
1131 ptr->initiator ? "Initiator" : "Responder",
1132 ptr->host, ptr->port));
1134 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1135 ptr->initiator == FALSE && !server->backup_router &&
1136 !silc_server_config_get_backup_router(server))
1137 server->wait_backup = TRUE;
1139 if (ptr->initiator) {
1140 /* Check whether we are connecting or connected to this host already */
1141 if (silc_server_num_sockets_by_remote(server,
1142 silc_net_is_ip(ptr->host) ?
1144 silc_net_is_ip(ptr->host) ?
1145 NULL : ptr->host, ptr->port,
1146 SILC_SOCKET_TYPE_ROUTER)) {
1147 SILC_LOG_DEBUG(("We are already connected to this router"));
1149 /* If we don't have primary router and this connection is our
1150 primary router we are in desync. Reconnect to the primary. */
1151 if (server->standalone && !server->router) {
1152 SilcServerConfigRouter *primary =
1153 silc_server_config_get_primary_router(server);
1154 if (primary == ptr) {
1155 SilcSocketConnection sock =
1156 silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
1157 ptr->host, ptr->port);
1159 server->backup_noswitch = TRUE;
1160 if (sock->user_data)
1161 silc_server_free_sock_user_data(server, sock, NULL);
1162 silc_server_disconnect_remote(server, sock, 0, NULL);
1163 server->backup_noswitch = FALSE;
1164 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1175 if (silc_server_num_sockets_by_remote(server,
1176 silc_net_is_ip(ptr->host) ?
1178 silc_net_is_ip(ptr->host) ?
1179 NULL : ptr->host, ptr->port,
1180 SILC_SOCKET_TYPE_UNKNOWN)) {
1181 SILC_LOG_DEBUG(("We are already connecting to this router"));
1185 /* Allocate connection object for hold connection specific stuff. */
1186 sconn = silc_calloc(1, sizeof(*sconn));
1187 sconn->remote_host = strdup(ptr->host);
1188 sconn->remote_port = ptr->port;
1189 sconn->backup = ptr->backup_router;
1190 if (sconn->backup) {
1191 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1192 sconn->backup_replace_port = ptr->backup_replace_port;
1195 if (!server->router_conn && !sconn->backup)
1196 server->router_conn = sconn;
1198 silc_schedule_task_add(server->schedule, 0,
1199 silc_server_connect_router,
1200 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1201 SILC_TASK_PRI_NORMAL);
1206 /* Second part of connecting to router(s). Key exchange protocol has been
1207 executed and now we will execute authentication protocol. */
1209 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1211 SilcProtocol protocol = (SilcProtocol)context;
1212 SilcServerKEInternalContext *ctx =
1213 (SilcServerKEInternalContext *)protocol->context;
1214 SilcServer server = (SilcServer)ctx->server;
1215 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1216 SilcSocketConnection sock = ctx->sock;
1217 SilcServerConnAuthInternalContext *proto_ctx;
1218 SilcServerConfigRouter *conn = NULL;
1220 SILC_LOG_DEBUG(("Start"));
1222 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1223 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1224 /* Error occured during protocol */
1225 silc_protocol_free(protocol);
1226 sock->protocol = NULL;
1227 silc_ske_free_key_material(ctx->keymat);
1229 silc_packet_context_free(ctx->packet);
1231 silc_ske_free(ctx->ske);
1232 silc_free(ctx->dest_id);
1234 silc_server_disconnect_remote(server, sock,
1235 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1237 /* Try reconnecting if configuration wants it */
1238 if (!sconn->no_reconnect) {
1239 silc_schedule_task_add(server->schedule, 0,
1240 silc_server_connect_to_router_retry,
1241 sconn, 1, 0, SILC_TASK_TIMEOUT,
1242 SILC_TASK_PRI_NORMAL);
1246 /* Call completion to indicate error */
1247 if (sconn->callback)
1248 (*sconn->callback)(server, NULL, sconn->callback_context);
1250 silc_server_config_unref(&sconn->conn);
1251 silc_free(sconn->remote_host);
1252 silc_free(sconn->backup_replace_ip);
1257 /* We now have the key material as the result of the key exchange
1258 protocol. Take the key material into use. Free the raw key material
1259 as soon as we've set them into use. */
1260 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1261 ctx->sock, ctx->keymat,
1262 ctx->ske->prop->cipher,
1263 ctx->ske->prop->pkcs,
1264 ctx->ske->prop->hash,
1265 ctx->ske->prop->hmac,
1266 ctx->ske->prop->group,
1268 silc_protocol_free(protocol);
1269 sock->protocol = NULL;
1270 silc_ske_free_key_material(ctx->keymat);
1272 silc_packet_context_free(ctx->packet);
1274 silc_ske_free(ctx->ske);
1275 silc_free(ctx->dest_id);
1277 silc_server_disconnect_remote(server, sock,
1278 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1280 /* Try reconnecting if configuration wants it */
1281 if (!sconn->no_reconnect) {
1282 silc_schedule_task_add(server->schedule, 0,
1283 silc_server_connect_to_router_retry,
1284 sconn, 1, 0, SILC_TASK_TIMEOUT,
1285 SILC_TASK_PRI_NORMAL);
1289 /* Call completion to indicate error */
1290 if (sconn->callback)
1291 (*sconn->callback)(server, NULL, sconn->callback_context);
1293 silc_server_config_unref(&sconn->conn);
1294 silc_free(sconn->remote_host);
1295 silc_free(sconn->backup_replace_ip);
1299 silc_ske_free_key_material(ctx->keymat);
1301 /* Allocate internal context for the authentication protocol. This
1302 is sent as context for the protocol. */
1303 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1304 proto_ctx->server = (void *)server;
1305 proto_ctx->context = (void *)sconn;
1306 proto_ctx->sock = sock;
1307 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1308 proto_ctx->dest_id_type = ctx->dest_id_type;
1309 proto_ctx->dest_id = ctx->dest_id;
1311 /* Resolve the authentication method used in this connection. Check if
1312 we find a match from user configured connections */
1313 if (!sconn->conn.ref_ptr)
1314 conn = silc_server_config_find_router_conn(server, sock->hostname,
1317 conn = sconn->conn.ref_ptr;
1320 /* Match found. Use the configured authentication method. Take only
1321 the passphrase, since for public key auth we automatically use
1322 our local key pair. */
1323 if (conn->passphrase) {
1324 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1325 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1327 proto_ctx->auth_data = strdup(conn->passphrase);
1328 proto_ctx->auth_data_len = strlen(conn->passphrase);
1329 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1331 } else if (conn->publickeys) {
1332 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1334 proto_ctx->auth_meth = SILC_AUTH_NONE;
1337 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1338 sock->hostname, sock->ip, sock->port));
1339 silc_protocol_free(protocol);
1340 sock->protocol = NULL;
1342 silc_packet_context_free(ctx->packet);
1344 silc_ske_free(ctx->ske);
1345 silc_free(ctx->dest_id);
1347 silc_server_config_unref(&sconn->conn);
1348 silc_free(sconn->remote_host);
1349 silc_free(sconn->backup_replace_ip);
1351 silc_server_disconnect_remote(server, sock,
1352 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1356 /* Free old protocol as it is finished now */
1357 silc_protocol_free(protocol);
1359 silc_packet_context_free(ctx->packet);
1361 sock->protocol = NULL;
1363 /* Allocate the authentication protocol. This is allocated here
1364 but we won't start it yet. We will be receiving party of this
1365 protocol thus we will wait that connecting party will make
1366 their first move. */
1367 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1368 &sock->protocol, proto_ctx,
1369 silc_server_connect_to_router_final);
1371 /* Register timeout task. If the protocol is not executed inside
1372 this timelimit the connection will be terminated. */
1373 proto_ctx->timeout_task =
1374 silc_schedule_task_add(server->schedule, sock->sock,
1375 silc_server_timeout_remote,
1377 server->config->conn_auth_timeout, 0,
1381 /* Run the protocol */
1382 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1385 /* Finalizes the connection to router. Registers a server task to the
1386 queue so that we can accept new connections. */
1388 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1390 SilcProtocol protocol = (SilcProtocol)context;
1391 SilcServerConnAuthInternalContext *ctx =
1392 (SilcServerConnAuthInternalContext *)protocol->context;
1393 SilcServer server = (SilcServer)ctx->server;
1394 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1395 SilcSocketConnection sock = ctx->sock;
1396 SilcServerEntry id_entry = NULL;
1398 unsigned char *id_string;
1400 SilcIDListData idata;
1401 SilcServerConfigRouter *conn = NULL;
1402 SilcServerConfigConnParams *param = NULL;
1404 SILC_LOG_DEBUG(("Start"));
1406 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1407 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1408 /* Error occured during protocol */
1409 silc_free(ctx->dest_id);
1410 sock->protocol = NULL;
1411 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1413 sock->protocol = protocol;
1415 /* Try reconnecting if configuration wants it */
1416 if (!sconn->no_reconnect) {
1417 silc_schedule_task_add(server->schedule, 0,
1418 silc_server_connect_to_router_retry,
1419 sconn, 1, 0, SILC_TASK_TIMEOUT,
1420 SILC_TASK_PRI_NORMAL);
1427 /* Add a task to the queue. This task receives new connections to the
1428 server. This task remains on the queue until the end of the program. */
1429 if (!server->listenning && !sconn->backup) {
1430 silc_schedule_task_add(server->schedule, server->sock,
1431 silc_server_accept_new_connection,
1432 (void *)server, 0, 0,
1434 SILC_TASK_PRI_NORMAL);
1435 server->listenning = TRUE;
1438 /* Send NEW_SERVER packet to the router. We will become registered
1439 to the SILC network after sending this packet. */
1440 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1441 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1442 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1443 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1444 silc_buffer_format(packet,
1445 SILC_STR_UI_SHORT(id_len),
1446 SILC_STR_UI_XNSTRING(id_string, id_len),
1447 SILC_STR_UI_SHORT(strlen(server->server_name)),
1448 SILC_STR_UI_XNSTRING(server->server_name,
1449 strlen(server->server_name)),
1452 /* Send the packet */
1453 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1454 packet->data, packet->len, TRUE);
1455 silc_buffer_free(packet);
1456 silc_free(id_string);
1458 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1460 /* Check that we do not have this ID already */
1461 id_entry = silc_idlist_find_server_by_id(server->local_list,
1462 ctx->dest_id, TRUE, NULL);
1464 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1466 id_entry = silc_idlist_find_server_by_id(server->global_list,
1467 ctx->dest_id, TRUE, NULL);
1469 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1472 SILC_LOG_DEBUG(("New server id(%s)",
1473 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1475 /* Add the connected router to global server list. Router is sent
1476 as NULL since it's local to us. */
1477 id_entry = silc_idlist_add_server(server->global_list,
1478 strdup(sock->hostname),
1479 SILC_ROUTER, ctx->dest_id, NULL, sock);
1481 silc_free(ctx->dest_id);
1482 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1483 sock->protocol = NULL;
1484 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1486 sock->protocol = protocol;
1490 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1491 silc_free(sock->user_data);
1492 sock->user_data = (void *)id_entry;
1493 sock->type = SILC_SOCKET_TYPE_ROUTER;
1494 idata = (SilcIDListData)sock->user_data;
1495 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1496 SILC_IDLIST_STATUS_LOCAL);
1498 conn = sconn->conn.ref_ptr;
1499 param = &server->config->param;
1500 if (conn && conn->param)
1501 param = conn->param;
1503 /* Perform keepalive. */
1504 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1505 silc_server_perform_heartbeat,
1508 /* Register re-key timeout */
1509 idata->rekey->timeout = param->key_exchange_rekey;
1510 silc_schedule_task_add(server->schedule, sock->sock,
1511 silc_server_rekey_callback,
1512 (void *)sock, idata->rekey->timeout, 0,
1513 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1515 if (!sconn->backup) {
1516 /* Mark this router our primary router if we're still standalone */
1517 if (server->standalone) {
1518 SILC_LOG_DEBUG(("This connection is our primary router"));
1519 server->id_entry->router = id_entry;
1520 server->router = id_entry;
1521 server->router->server_type = SILC_ROUTER;
1522 server->standalone = FALSE;
1523 server->backup_primary = FALSE;
1525 /* Announce data if we are not backup router (unless not as primary
1526 currently). Backup router announces later at the end of
1527 resuming protocol. */
1528 if (server->backup_router && server->server_type == SILC_ROUTER) {
1529 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1531 /* If we are router then announce our possible servers. Backup
1532 router announces also global servers. */
1533 if (server->server_type == SILC_ROUTER)
1534 silc_server_announce_servers(server,
1535 server->backup_router ? TRUE : FALSE,
1536 0, SILC_PRIMARY_ROUTE(server));
1538 /* Announce our clients and channels to the router */
1539 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1540 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1543 /* If we are backup router then this primary router is whom we are
1545 if (server->server_type == SILC_BACKUP_ROUTER)
1546 silc_server_backup_add(server, server->id_entry, sock->ip,
1547 sconn->remote_port, TRUE);
1550 /* Add this server to be our backup router */
1551 id_entry->server_type = SILC_BACKUP_ROUTER;
1552 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1553 sconn->backup_replace_port, FALSE);
1556 sock->protocol = NULL;
1559 /* Call the completion callback to indicate that we've connected to
1561 if (sconn && sconn->callback)
1562 (*sconn->callback)(server, id_entry, sconn->callback_context);
1564 /* Free the temporary connection data context */
1566 silc_server_config_unref(&sconn->conn);
1567 silc_free(sconn->remote_host);
1568 silc_free(sconn->backup_replace_ip);
1571 if (sconn == server->router_conn)
1572 server->router_conn = NULL;
1575 /* Free the protocol object */
1576 if (sock->protocol == protocol)
1577 sock->protocol = NULL;
1578 silc_protocol_free(protocol);
1580 silc_packet_context_free(ctx->packet);
1582 silc_ske_free(ctx->ske);
1583 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1584 silc_free(ctx->auth_data);
1588 /* Host lookup callback that is called after the incoming connection's
1589 IP and FQDN lookup is performed. This will actually check the acceptance
1590 of the incoming connection and will register the key exchange protocol
1591 for this connection. */
1594 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1597 SilcServerKEInternalContext *proto_ctx =
1598 (SilcServerKEInternalContext *)context;
1599 SilcServer server = (SilcServer)proto_ctx->server;
1600 SilcServerConfigClient *cconfig = NULL;
1601 SilcServerConfigServer *sconfig = NULL;
1602 SilcServerConfigRouter *rconfig = NULL;
1603 SilcServerConfigDeny *deny;
1606 /* Check whether we could resolve both IP and FQDN. */
1607 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1608 server->config->require_reverse_lookup)) {
1609 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1610 sock->hostname ? sock->hostname :
1611 sock->ip ? sock->ip : ""));
1612 server->stat.conn_failures++;
1613 silc_server_disconnect_remote(server, sock,
1614 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1615 "Unknown host or IP");
1616 silc_free(proto_ctx);
1620 /* Register the connection for network input and output. This sets
1621 that scheduler will listen for incoming packets for this connection
1622 and sets that outgoing packets may be sent to this connection as well.
1623 However, this doesn't set the scheduler for outgoing traffic, it
1624 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1625 later when outgoing data is available. */
1626 context = (void *)server;
1627 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1629 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1632 /* Listenning port */
1633 if (!server->sockets[SILC_PTR_TO_32(proto_ctx->context)]) {
1634 silc_server_disconnect_remote(server, sock,
1635 SILC_STATUS_ERR_RESOURCE_LIMIT,
1636 "Connection refused");
1637 server->stat.conn_failures++;
1638 silc_free(proto_ctx);
1641 port = server->sockets[SILC_PTR_TO_32(proto_ctx->context)]->port;
1643 /* Check whether this connection is denied to connect to us. */
1644 deny = silc_server_config_find_denied(server, sock->ip);
1646 deny = silc_server_config_find_denied(server, sock->hostname);
1648 /* The connection is denied */
1649 SILC_LOG_INFO(("Connection %s (%s) is denied",
1650 sock->hostname, sock->ip));
1651 silc_server_disconnect_remote(server, sock,
1652 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1654 server->stat.conn_failures++;
1655 silc_free(proto_ctx);
1659 /* Check whether we have configured this sort of connection at all. We
1660 have to check all configurations since we don't know what type of
1661 connection this is. */
1662 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1663 cconfig = silc_server_config_find_client(server, sock->hostname);
1664 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1665 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1666 if (server->server_type == SILC_ROUTER) {
1667 if (!(rconfig = silc_server_config_find_router_conn(server,
1668 sock->ip, sock->port)))
1669 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1672 if (!cconfig && !sconfig && !rconfig) {
1673 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1675 silc_server_disconnect_remote(server, sock,
1676 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1677 server->stat.conn_failures++;
1678 silc_free(proto_ctx);
1682 /* The connection is allowed */
1684 /* Set internal context for key exchange protocol. This is
1685 sent as context for the protocol. */
1686 proto_ctx->sock = sock;
1687 proto_ctx->rng = server->rng;
1688 proto_ctx->responder = TRUE;
1689 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1690 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1691 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1693 /* Take flags for key exchange. Since we do not know what type of connection
1694 this is, we go through all found configurations and use the global ones
1695 as well. This will result always into strictest key exchange flags. */
1696 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1697 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1698 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1699 if (server->config->param.key_exchange_pfs)
1700 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1702 /* Prepare the connection for key exchange protocol. We allocate the
1703 protocol but will not start it yet. The connector will be the
1704 initiator of the protocol thus we will wait for initiation from
1705 there before we start the protocol. */
1706 server->stat.auth_attempts++;
1707 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1708 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1709 &sock->protocol, proto_ctx,
1710 silc_server_accept_new_connection_second);
1712 /* Register a timeout task that will be executed if the connector
1713 will not start the key exchange protocol within specified timeout
1714 and the connection will be closed. */
1715 proto_ctx->timeout_task =
1716 silc_schedule_task_add(server->schedule, sock->sock,
1717 silc_server_timeout_remote,
1719 server->config->key_exchange_timeout, 0,
1724 /* Accepts new connections to the server. Accepting new connections are
1725 done in three parts to make it async. */
1727 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1729 SilcServer server = (SilcServer)context;
1730 SilcSocketConnection newsocket;
1731 SilcServerKEInternalContext *proto_ctx;
1734 SILC_LOG_DEBUG(("Accepting new connection"));
1736 server->stat.conn_attempts++;
1738 sock = silc_net_accept_connection(fd);
1740 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1741 server->stat.conn_failures++;
1745 /* Check for maximum allowed connections */
1746 if (sock > server->config->param.connections_max) {
1747 SILC_LOG_ERROR(("Refusing connection, server is full"));
1748 server->stat.conn_failures++;
1749 silc_net_close_connection(sock);
1752 server->stat.conn_num++;
1754 /* Set socket options */
1755 silc_net_set_socket_nonblock(sock);
1756 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1758 /* We don't create a ID yet, since we don't know what type of connection
1759 this is yet. But, we do add the connection to the socket table. */
1760 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1761 server->sockets[sock] = newsocket;
1763 /* Perform asynchronous host lookup. This will lookup the IP and the
1764 FQDN of the remote connection. After the lookup is done the connection
1765 is accepted further. */
1766 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1767 proto_ctx->server = server;
1768 proto_ctx->context = SILC_32_TO_PTR(fd);
1769 silc_socket_host_lookup(newsocket, TRUE,
1770 silc_server_accept_new_connection_lookup,
1771 (void *)proto_ctx, server->schedule);
1774 /* Second part of accepting new connection. Key exchange protocol has been
1775 performed and now it is time to do little connection authentication
1776 protocol to figure out whether this connection is client or server
1777 and whether it has right to access this server (especially server
1778 connections needs to be authenticated). */
1780 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1782 SilcProtocol protocol = (SilcProtocol)context;
1783 SilcServerKEInternalContext *ctx =
1784 (SilcServerKEInternalContext *)protocol->context;
1785 SilcServer server = (SilcServer)ctx->server;
1786 SilcSocketConnection sock = ctx->sock;
1787 SilcServerConnAuthInternalContext *proto_ctx;
1789 SILC_LOG_DEBUG(("Start"));
1791 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1792 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1793 /* Error occured during protocol */
1794 SILC_LOG_DEBUG(("Error in key exchange protocol"));
1795 silc_protocol_free(protocol);
1796 sock->protocol = NULL;
1797 silc_ske_free_key_material(ctx->keymat);
1799 silc_packet_context_free(ctx->packet);
1801 silc_ske_free(ctx->ske);
1802 silc_free(ctx->dest_id);
1803 silc_server_config_unref(&ctx->cconfig);
1804 silc_server_config_unref(&ctx->sconfig);
1805 silc_server_config_unref(&ctx->rconfig);
1808 if (!SILC_IS_DISCONNECTING(sock)) {
1809 SILC_LOG_INFO(("Key exchange failed for %s:%d [%s]", sock->hostname,
1811 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1812 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1813 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1815 silc_server_disconnect_remote(server, sock,
1816 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1820 server->stat.auth_failures++;
1824 /* We now have the key material as the result of the key exchange
1825 protocol. Take the key material into use. Free the raw key material
1826 as soon as we've set them into use. */
1827 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1828 ctx->sock, ctx->keymat,
1829 ctx->ske->prop->cipher,
1830 ctx->ske->prop->pkcs,
1831 ctx->ske->prop->hash,
1832 ctx->ske->prop->hmac,
1833 ctx->ske->prop->group,
1835 SILC_LOG_ERROR(("Error setting key material in use"));
1836 silc_protocol_free(protocol);
1837 sock->protocol = NULL;
1838 silc_ske_free_key_material(ctx->keymat);
1840 silc_packet_context_free(ctx->packet);
1842 silc_ske_free(ctx->ske);
1843 silc_free(ctx->dest_id);
1844 silc_server_config_unref(&ctx->cconfig);
1845 silc_server_config_unref(&ctx->sconfig);
1846 silc_server_config_unref(&ctx->rconfig);
1848 silc_server_disconnect_remote(server, sock,
1849 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1850 server->stat.auth_failures++;
1853 silc_ske_free_key_material(ctx->keymat);
1855 /* Allocate internal context for the authentication protocol. This
1856 is sent as context for the protocol. */
1857 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1858 proto_ctx->server = (void *)server;
1859 proto_ctx->sock = sock;
1860 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1861 proto_ctx->responder = TRUE;
1862 proto_ctx->dest_id_type = ctx->dest_id_type;
1863 proto_ctx->dest_id = ctx->dest_id;
1864 proto_ctx->cconfig = ctx->cconfig;
1865 proto_ctx->sconfig = ctx->sconfig;
1866 proto_ctx->rconfig = ctx->rconfig;
1868 /* Free old protocol as it is finished now */
1869 silc_protocol_free(protocol);
1871 silc_packet_context_free(ctx->packet);
1873 sock->protocol = NULL;
1875 /* Allocate the authentication protocol. This is allocated here
1876 but we won't start it yet. We will be receiving party of this
1877 protocol thus we will wait that connecting party will make
1878 their first move. */
1879 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1880 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1881 &sock->protocol, proto_ctx,
1882 silc_server_accept_new_connection_final);
1884 /* Register timeout task. If the protocol is not executed inside
1885 this timelimit the connection will be terminated. */
1886 proto_ctx->timeout_task =
1887 silc_schedule_task_add(server->schedule, sock->sock,
1888 silc_server_timeout_remote,
1890 server->config->conn_auth_timeout, 0,
1895 /* After this is called, server don't wait for backup router anymore.
1896 This gets called automatically even after we have backup router
1897 connection established. */
1899 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1901 SilcServer server = context;
1902 server->wait_backup = FALSE;
1905 /* Final part of accepting new connection. The connection has now
1906 been authenticated and keys has been exchanged. We also know whether
1907 this is client or server connection. */
1909 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1911 SilcProtocol protocol = (SilcProtocol)context;
1912 SilcServerConnAuthInternalContext *ctx =
1913 (SilcServerConnAuthInternalContext *)protocol->context;
1914 SilcServer server = (SilcServer)ctx->server;
1915 SilcSocketConnection sock = ctx->sock;
1916 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1918 SilcServerConfigConnParams *param = &server->config->param;
1920 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1921 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1922 /* Error occured during protocol */
1923 SILC_LOG_DEBUG(("Error during authentication protocol"));
1924 silc_protocol_free(protocol);
1925 sock->protocol = NULL;
1927 silc_packet_context_free(ctx->packet);
1929 silc_ske_free(ctx->ske);
1930 silc_free(ctx->dest_id);
1931 silc_server_config_unref(&ctx->cconfig);
1932 silc_server_config_unref(&ctx->sconfig);
1933 silc_server_config_unref(&ctx->rconfig);
1936 if (!SILC_IS_DISCONNECTING(sock)) {
1937 SILC_LOG_INFO(("Authentication failed for %s:%d [%s]", sock->hostname,
1939 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1940 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1941 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1943 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1946 server->stat.auth_failures++;
1950 entry->data.last_receive = time(NULL);
1952 switch (ctx->conn_type) {
1953 case SILC_SOCKET_TYPE_CLIENT:
1955 SilcClientEntry client;
1956 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1958 /* Verify whether this connection is after all allowed to connect */
1959 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1960 &server->config->param,
1961 conn->param, ctx->ske)) {
1962 server->stat.auth_failures++;
1966 /* If we are primary router and we have backup router configured
1967 but it has not connected to use yet, do not accept any other
1969 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1970 !server->backup_router) {
1971 SilcServerConfigRouter *router;
1972 router = silc_server_config_get_backup_router(server);
1973 if (router && strcmp(server->config->server_info->primary->server_ip,
1975 silc_server_find_socket_by_host(server,
1976 SILC_SOCKET_TYPE_SERVER,
1977 router->backup_replace_ip, 0)) {
1978 SILC_LOG_INFO(("Will not accept connections because we do "
1979 "not have backup router connection established"));
1980 sock->protocol = NULL;
1981 silc_server_disconnect_remote(server, sock,
1982 SILC_STATUS_ERR_PERM_DENIED,
1983 "We do not have connection to backup "
1984 "router established, try later");
1985 silc_free(sock->user_data);
1986 server->stat.auth_failures++;
1988 /* From here on, wait 20 seconds for the backup router to appear. */
1989 silc_schedule_task_add(server->schedule, 0,
1990 silc_server_backup_router_wait,
1991 (void *)server, 20, 0,
1992 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1997 SILC_LOG_DEBUG(("Remote host is client"));
1998 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
2001 /* Add the client to the client ID cache. The nickname and Client ID
2002 and other information is created after we have received NEW_CLIENT
2003 packet from client. */
2004 client = silc_idlist_add_client(server->local_list,
2005 NULL, NULL, NULL, NULL, NULL, sock, 0);
2007 SILC_LOG_ERROR(("Could not add new client to cache"));
2008 silc_free(sock->user_data);
2009 sock->protocol = NULL;
2010 silc_server_disconnect_remote(server, sock,
2011 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2012 server->stat.auth_failures++;
2015 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2018 server->stat.my_clients++;
2019 server->stat.clients++;
2020 server->stat.cell_clients++;
2022 /* Get connection parameters */
2024 param = conn->param;
2026 if (!param->keepalive_secs)
2027 param->keepalive_secs = server->config->param.keepalive_secs;
2029 if (!param->qos && server->config->param.qos) {
2030 param->qos = server->config->param.qos;
2031 param->qos_rate_limit = server->config->param.qos_rate_limit;
2032 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2033 param->qos_limit_sec = server->config->param.qos_limit_sec;
2034 param->qos_limit_usec = server->config->param.qos_limit_usec;
2037 /* Check if to be anonymous connection */
2038 if (param->anonymous)
2039 client->mode |= SILC_UMODE_ANONYMOUS;
2042 /* Add public key to hash list (for whois using attributes) */
2043 if (!silc_hash_table_find_by_context(server->pk_hash,
2044 entry->data.public_key,
2046 silc_hash_table_add(server->pk_hash,
2047 entry->data.public_key, client);
2049 id_entry = (void *)client;
2052 case SILC_SOCKET_TYPE_SERVER:
2053 case SILC_SOCKET_TYPE_ROUTER:
2055 SilcServerEntry new_server;
2056 bool initiator = FALSE;
2057 bool backup_local = FALSE;
2058 bool backup_router = FALSE;
2059 char *backup_replace_ip = NULL;
2060 SilcUInt16 backup_replace_port = 0;
2061 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
2062 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
2064 /* If we are backup router and this is incoming server connection
2065 and we do not have connection to primary router, do not allow
2067 if (server->server_type == SILC_BACKUP_ROUTER &&
2068 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
2069 !SILC_PRIMARY_ROUTE(server)) {
2070 SILC_LOG_INFO(("Will not accept server connection because we do "
2071 "not have primary router connection established"));
2072 sock->protocol = NULL;
2073 silc_server_disconnect_remote(server, sock,
2074 SILC_STATUS_ERR_PERM_DENIED,
2075 "We do not have connection to primary "
2076 "router established, try later");
2077 silc_free(sock->user_data);
2078 server->stat.auth_failures++;
2082 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2083 /* Verify whether this connection is after all allowed to connect */
2084 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
2085 &server->config->param,
2086 rconn ? rconn->param : NULL,
2088 silc_free(sock->user_data);
2089 server->stat.auth_failures++;
2095 param = rconn->param;
2097 if (!param->keepalive_secs)
2098 param->keepalive_secs = server->config->param.keepalive_secs;
2100 if (!param->qos && server->config->param.qos) {
2101 param->qos = server->config->param.qos;
2102 param->qos_rate_limit = server->config->param.qos_rate_limit;
2103 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2104 param->qos_limit_sec = server->config->param.qos_limit_sec;
2105 param->qos_limit_usec = server->config->param.qos_limit_usec;
2109 initiator = rconn->initiator;
2110 backup_local = rconn->backup_local;
2111 backup_router = rconn->backup_router;
2112 backup_replace_ip = rconn->backup_replace_ip;
2113 backup_replace_port = rconn->backup_replace_port;
2117 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2118 /* Verify whether this connection is after all allowed to connect */
2119 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
2120 &server->config->param,
2121 sconn ? sconn->param : NULL,
2123 silc_free(sock->user_data);
2124 server->stat.auth_failures++;
2129 param = sconn->param;
2131 if (!param->keepalive_secs)
2132 param->keepalive_secs = server->config->param.keepalive_secs;
2134 if (!param->qos && server->config->param.qos) {
2135 param->qos = server->config->param.qos;
2136 param->qos_rate_limit = server->config->param.qos_rate_limit;
2137 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2138 param->qos_limit_sec = server->config->param.qos_limit_sec;
2139 param->qos_limit_usec = server->config->param.qos_limit_usec;
2143 backup_router = sconn->backup_router;
2147 /* If we are primary router and we have backup router configured
2148 but it has not connected to use yet, do not accept any other
2150 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2151 !server->backup_router && !backup_router) {
2152 SilcServerConfigRouter *router;
2153 router = silc_server_config_get_backup_router(server);
2154 if (router && strcmp(server->config->server_info->primary->server_ip,
2156 silc_server_find_socket_by_host(server,
2157 SILC_SOCKET_TYPE_SERVER,
2158 router->backup_replace_ip, 0)) {
2159 SILC_LOG_INFO(("Will not accept connections because we do "
2160 "not have backup router connection established"));
2161 sock->protocol = NULL;
2162 silc_server_disconnect_remote(server, sock,
2163 SILC_STATUS_ERR_PERM_DENIED,
2164 "We do not have connection to backup "
2165 "router established, try later");
2166 silc_free(sock->user_data);
2167 server->stat.auth_failures++;
2169 /* From here on, wait 20 seconds for the backup router to appear. */
2170 silc_schedule_task_add(server->schedule, 0,
2171 silc_server_backup_router_wait,
2172 (void *)server, 20, 0,
2173 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2178 SILC_LOG_DEBUG(("Remote host is %s",
2179 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2180 "server" : (backup_router ?
2181 "backup router" : "router")));
2182 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2183 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2184 "server" : (backup_router ?
2185 "backup router" : "router")));
2187 /* Add the server into server cache. The server name and Server ID
2188 is updated after we have received NEW_SERVER packet from the
2189 server. We mark ourselves as router for this server if we really
2192 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2193 server->local_list : (backup_router ?
2194 server->local_list :
2195 server->global_list)),
2197 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2198 SILC_SERVER : SILC_ROUTER),
2200 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2201 server->id_entry : (backup_router ?
2202 server->id_entry : NULL)),
2205 SILC_LOG_ERROR(("Could not add new server to cache"));
2206 silc_free(sock->user_data);
2207 sock->protocol = NULL;
2208 silc_server_disconnect_remote(server, sock,
2209 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2210 server->stat.auth_failures++;
2213 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2215 id_entry = (void *)new_server;
2217 /* If the incoming connection is router and marked as backup router
2218 then add it to be one of our backups */
2219 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2220 /* Change it back to SERVER type since that's what it really is. */
2222 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2223 new_server->server_type = SILC_BACKUP_ROUTER;
2225 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2226 ("Backup router %s is now online",
2229 /* Remove the backup waiting with timeout */
2230 silc_schedule_task_add(server->schedule, 0,
2231 silc_server_backup_router_wait,
2232 (void *)server, 10, 0,
2233 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2237 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2238 server->stat.my_servers++;
2239 server->stat.servers++;
2241 server->stat.my_routers++;
2242 server->stat.routers++;
2245 /* Check whether this connection is to be our primary router connection
2246 if we do not already have the primary route. */
2247 if (!backup_router &&
2248 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2249 if (silc_server_config_is_primary_route(server) && !initiator)
2252 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2253 server->standalone = FALSE;
2254 if (!server->id_entry->router) {
2255 server->id_entry->router = id_entry;
2256 server->router = id_entry;
2267 sock->type = ctx->conn_type;
2269 /* Add the common data structure to the ID entry. */
2270 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2272 /* Add to sockets internal pointer for fast referencing */
2273 silc_free(sock->user_data);
2274 sock->user_data = id_entry;
2276 /* Connection has been fully established now. Everything is ok. */
2277 SILC_LOG_DEBUG(("New connection authenticated"));
2279 /* Perform keepalive. */
2280 if (param->keepalive_secs)
2281 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2282 silc_server_perform_heartbeat,
2285 /* Perform Quality of Service */
2287 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2288 param->qos_limit_sec, param->qos_limit_usec,
2292 if (sock->protocol == protocol)
2293 silc_protocol_free(protocol);
2295 silc_packet_context_free(ctx->packet);
2297 silc_ske_free(ctx->ske);
2298 silc_free(ctx->dest_id);
2299 silc_server_config_unref(&ctx->cconfig);
2300 silc_server_config_unref(&ctx->sconfig);
2301 silc_server_config_unref(&ctx->rconfig);
2303 sock->protocol = NULL;
2306 /* This function is used to read packets from network and send packets to
2307 network. This is usually a generic task. */
2309 SILC_TASK_CALLBACK(silc_server_packet_process)
2311 SilcServer server = (SilcServer)context;
2312 SilcSocketConnection sock = server->sockets[fd];
2313 SilcIDListData idata;
2314 SilcCipher cipher = NULL;
2315 SilcHmac hmac = NULL;
2316 SilcUInt32 sequence = 0;
2317 bool local_is_router;
2321 SILC_LOG_DEBUG(("Unknown socket connection"));
2325 /* Packet sending */
2327 if (type == SILC_TASK_WRITE) {
2328 /* Do not send data to disconnected connection */
2329 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2330 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2331 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2332 SILC_UNSET_OUTBUF_PENDING(sock);
2333 silc_buffer_clear(sock->outbuf);
2337 server->stat.packets_sent++;
2339 /* Send the packet */
2340 ret = silc_packet_send(sock, TRUE);
2342 /* If returned -2 could not write to connection now, will do
2347 /* The packet has been sent and now it is time to set the connection
2348 back to only for input. When there is again some outgoing data
2349 available for this connection it will be set for output as well.
2350 This call clears the output setting and sets it only for input. */
2351 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2352 SILC_UNSET_OUTBUF_PENDING(sock);
2353 silc_buffer_clear(sock->outbuf);
2356 SILC_LOG_ERROR(("Error sending packet to connection "
2357 "%s:%d [%s]", sock->hostname, sock->port,
2358 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2359 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2360 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2363 if (sock->user_data) {
2364 /* If backup then mark that resuming will not be allowed */
2365 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2366 sock->type == SILC_SOCKET_TYPE_SERVER) {
2367 SilcServerEntry server_entry = sock->user_data;
2368 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2369 server->backup_closed = TRUE;
2372 silc_server_free_sock_user_data(server, sock, NULL);
2374 SILC_SET_DISCONNECTING(sock);
2375 silc_server_close_connection(server, sock);
2380 /* Packet receiving */
2382 /* Read some data from connection */
2383 ret = silc_packet_receive(sock);
2387 SILC_LOG_ERROR(("Error receiving packet from connection "
2388 "%s:%d [%s] %s", sock->hostname, sock->port,
2389 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2390 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2391 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2392 "Router"), strerror(errno)));
2394 if (sock->user_data) {
2395 /* If backup then mark that resuming will not be allowed */
2396 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2397 sock->type == SILC_SOCKET_TYPE_SERVER) {
2398 SilcServerEntry server_entry = sock->user_data;
2399 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2400 server->backup_closed = TRUE;
2403 silc_server_free_sock_user_data(server, sock, NULL);
2405 SILC_SET_DISCONNECTING(sock);
2406 silc_server_close_connection(server, sock);
2413 SILC_LOG_DEBUG(("Read EOF"));
2415 /* If connection is disconnecting already we will finally
2416 close the connection */
2417 if (SILC_IS_DISCONNECTING(sock)) {
2418 if (sock->user_data)
2419 silc_server_free_sock_user_data(server, sock, NULL);
2420 silc_server_close_connection(server, sock);
2424 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2426 if (sock->user_data) {
2429 /* If backup disconnected then mark that resuming will not be allowed */
2430 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2431 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2432 SilcServerEntry server_entry = sock->user_data;
2433 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2434 server->backup_closed = TRUE;
2437 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2438 silc_server_free_sock_user_data(server, sock, tmp);
2440 silc_server_free_sock_user_data(server, sock, NULL);
2441 } else if (server->router_conn && server->router_conn->sock == sock &&
2442 !server->router && server->standalone) {
2443 silc_server_create_connections(server);
2446 SILC_SET_DISCONNECTING(sock);
2447 silc_server_close_connection(server, sock);
2451 /* If connection is disconnecting or disconnected we will ignore
2453 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2454 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2458 /* Get keys and stuff from ID entry */
2459 idata = (SilcIDListData)sock->user_data;
2461 cipher = idata->receive_key;
2462 hmac = idata->hmac_receive;
2463 sequence = idata->psn_receive;
2466 /* Then, process the packet. This will call the parser that will then
2467 decrypt and parse the packet. */
2469 local_is_router = (server->server_type == SILC_ROUTER);
2471 /* If socket connection is our primary, we are backup and we are doing
2472 backup resuming, we won't process the packet as being a router
2473 (affects channel message decryption). */
2474 if (server->backup_router && SILC_SERVER_IS_BACKUP(sock) &&
2475 SILC_PRIMARY_ROUTE(server) == sock)
2476 local_is_router = FALSE;
2478 ret = silc_packet_receive_process(sock, local_is_router,
2479 cipher, hmac, sequence,
2480 silc_server_packet_parse, server);
2482 /* If processing failed the connection is closed. */
2484 /* On packet processing errors we may close our primary router
2485 connection but won't become primary router if we are the backup
2486 since this is local error condition. */
2487 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2488 server->backup_noswitch = TRUE;
2490 if (sock->user_data) {
2491 /* If we are router and backup errorred then mark that resuming
2492 will not be allowed */
2493 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2494 sock->type == SILC_SOCKET_TYPE_SERVER) {
2495 SilcServerEntry server_entry = sock->user_data;
2496 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2497 server->backup_closed = TRUE;
2500 silc_server_free_sock_user_data(server, sock, NULL);
2502 SILC_SET_DISCONNECTING(sock);
2503 silc_server_close_connection(server, sock);
2507 /* Parses whole packet, received earlier. */
2509 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2511 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2512 SilcServer server = (SilcServer)parse_ctx->context;
2513 SilcSocketConnection sock = parse_ctx->sock;
2514 SilcPacketContext *packet = parse_ctx->packet;
2515 SilcIDListData idata = (SilcIDListData)sock->user_data;
2518 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2519 SILC_LOG_DEBUG(("Connection is disconnected"));
2523 server->stat.packets_received++;
2525 /* Parse the packet */
2526 if (parse_ctx->normal)
2527 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2529 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2531 /* If entry is disabled ignore what we got. */
2532 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2533 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2534 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE &&
2535 ret != SILC_PACKET_KEY_EXCHANGE_1 && ret != SILC_PACKET_KEY_EXCHANGE_2) {
2536 SILC_LOG_DEBUG(("Connection is disabled (packet %s dropped)",
2537 silc_get_packet_name(ret)));
2541 if (ret == SILC_PACKET_NONE) {
2542 SILC_LOG_DEBUG(("Error parsing packet"));
2546 /* Check that the the current client ID is same as in the client's packet. */
2547 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2548 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2549 if (client && client->id && packet->src_id) {
2550 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2551 packet->src_id_type);
2552 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2554 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2561 if (server->server_type == SILC_ROUTER) {
2562 /* Route the packet if it is not destined to us. Other ID types but
2563 server are handled separately after processing them. */
2564 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2565 packet->dst_id_type == SILC_ID_SERVER &&
2566 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2567 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2568 SilcSocketConnection conn;
2570 /* Route the packet to fastest route for the destination ID */
2571 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2572 packet->dst_id_type);
2576 conn = silc_server_route_get(server, id, packet->dst_id_type);
2578 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
2579 silc_id_render(id, SILC_ID_SERVER)));
2583 silc_server_packet_route(server, conn, packet);
2589 /* Parse the incoming packet type */
2590 silc_server_packet_parse_type(server, sock, packet);
2592 /* Broadcast packet if it is marked as broadcast packet and it is
2593 originated from router and we are router. */
2594 if (server->server_type == SILC_ROUTER &&
2595 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2596 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2597 /* Broadcast to our primary route */
2598 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2600 /* If we have backup routers then we need to feed all broadcast
2601 data to those servers. */
2602 silc_server_backup_broadcast(server, sock, packet);
2606 silc_packet_context_free(packet);
2607 silc_free(parse_ctx);
2610 /* Parser callback called by silc_packet_receive_process. This merely
2611 registers timeout that will handle the actual parsing when appropriate. */
2613 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2616 SilcServer server = (SilcServer)context;
2617 SilcSocketConnection sock = parser_context->sock;
2618 SilcIDListData idata = (SilcIDListData)sock->user_data;
2622 idata->psn_receive = parser_context->packet->sequence + 1;
2624 /* If protocol for this connection is key exchange or rekey then we'll
2625 process all packets synchronously, since there might be packets in
2626 queue that we are not able to decrypt without first processing the
2627 packets before them. */
2628 if (sock->protocol && sock->protocol->protocol &&
2629 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2630 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2631 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2634 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2635 SILC_LOG_DEBUG(("Connection is disconnected"));
2639 /* Reprocess data since we'll return FALSE here. This is because
2640 the idata->receive_key might have become valid in the last packet
2641 and we want to call this processor with valid cipher. */
2643 ret = silc_packet_receive_process(
2644 sock, server->server_type == SILC_ROUTER,
2646 idata->hmac_receive, idata->psn_receive,
2647 silc_server_packet_parse, server);
2649 ret = silc_packet_receive_process(
2650 sock, server->server_type == SILC_ROUTER,
2652 silc_server_packet_parse, server);
2655 /* On packet processing errors we may close our primary router
2656 connection but won't become primary router if we are the backup
2657 since this is local error condition. */
2658 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2659 server->backup_noswitch = TRUE;
2661 if (sock->user_data)
2662 silc_server_free_sock_user_data(server, sock, NULL);
2663 SILC_SET_DISCONNECTING(sock);
2664 silc_server_close_connection(server, sock);
2670 switch (sock->type) {
2671 case SILC_SOCKET_TYPE_UNKNOWN:
2672 case SILC_SOCKET_TYPE_CLIENT:
2673 /* Parse the packet with timeout */
2674 silc_schedule_task_add(server->schedule, sock->sock,
2675 silc_server_packet_parse_real,
2676 (void *)parser_context, 0, 100000,
2678 SILC_TASK_PRI_NORMAL);
2680 case SILC_SOCKET_TYPE_SERVER:
2681 case SILC_SOCKET_TYPE_ROUTER:
2682 /* Packets from servers are parsed immediately */
2683 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2691 /* Parses the packet type and calls what ever routines the packet type
2692 requires. This is done for all incoming packets. */
2694 void silc_server_packet_parse_type(SilcServer server,
2695 SilcSocketConnection sock,
2696 SilcPacketContext *packet)
2698 SilcPacketType type = packet->type;
2699 SilcIDListData idata = (SilcIDListData)sock->user_data;
2701 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2702 silc_get_packet_name(type), packet->flags));
2704 /* Parse the packet type */
2706 case SILC_PACKET_DISCONNECT:
2709 char *message = NULL;
2711 if (packet->flags & SILC_PACKET_FLAG_LIST)
2713 if (packet->buffer->len < 1)
2716 status = (SilcStatus)packet->buffer->data[0];
2717 if (packet->buffer->len > 1 &&
2718 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2719 message = silc_memdup(packet->buffer->data + 1,
2720 packet->buffer->len - 1);
2722 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2723 sock->ip, sock->hostname,
2724 silc_get_status_message(status), status,
2725 message ? message : ""));
2728 /* Do not switch to backup in case of error */
2729 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
2731 /* If backup disconnected then mark that resuming will not be allowed */
2732 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2733 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2734 SilcServerEntry server_entry = sock->user_data;
2735 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2736 server->backup_closed = TRUE;
2739 /* Handle the disconnection from our end too */
2740 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2741 silc_server_free_sock_user_data(server, sock, NULL);
2742 SILC_SET_DISCONNECTING(sock);
2743 silc_server_close_connection(server, sock);
2744 server->backup_noswitch = FALSE;
2748 case SILC_PACKET_SUCCESS:
2750 * Success received for something. For now we can have only
2751 * one protocol for connection executing at once hence this
2752 * success message is for whatever protocol is executing currently.
2754 if (packet->flags & SILC_PACKET_FLAG_LIST)
2757 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2760 case SILC_PACKET_FAILURE:
2762 * Failure received for something. For now we can have only
2763 * one protocol for connection executing at once hence this
2764 * failure message is for whatever protocol is executing currently.
2766 if (packet->flags & SILC_PACKET_FLAG_LIST)
2769 /* Check for failure START_USE from backup router */
2770 if (server->server_type == SILC_SERVER &&
2771 server->backup_primary && packet->buffer->len == 4) {
2773 SILC_GET32_MSB(type, packet->buffer->data);
2774 if (type == SILC_SERVER_BACKUP_START_USE) {
2775 /* Attempt to reconnect to primary */
2776 SILC_LOG_DEBUG(("Received failed START_USE from backup %s", sock->ip));
2778 /* Default action is to disconnect from backup and reconnect to
2779 primary. Since this failure can happen during switching to
2780 backup (backup might have not noticed the primary going down yet),
2781 we will wait a while and keep sending START_USE to backup.
2782 Only after that we'll give up. */
2783 if (server->router == sock->user_data &&
2784 (time(0) - server->router_connect) < 30) {
2785 SILC_LOG_DEBUG(("Resending START_USE to backup router"));
2786 silc_server_backup_send_start_use(server, sock, FALSE);
2790 /* If backup is our primary, disconnect now. */
2791 if (server->router == sock->user_data) {
2792 if (sock->user_data)
2793 silc_server_free_sock_user_data(server, sock, NULL);
2794 SILC_SET_DISCONNECTING(sock);
2795 silc_server_close_connection(server, sock);
2799 silc_server_create_connections(server);
2803 /* Execute protocol */
2804 if (sock->protocol) {
2805 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
2806 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2811 case SILC_PACKET_REJECT:
2812 if (packet->flags & SILC_PACKET_FLAG_LIST)
2817 case SILC_PACKET_NOTIFY:
2819 * Received notify packet. Server can receive notify packets from
2820 * router. Server then relays the notify messages to clients if needed.
2822 if (packet->flags & SILC_PACKET_FLAG_LIST)
2823 silc_server_notify_list(server, sock, packet);
2825 silc_server_notify(server, sock, packet);
2831 case SILC_PACKET_CHANNEL_MESSAGE:
2833 * Received channel message. Channel messages are special packets
2834 * (although probably most common ones) thus they are handled
2837 if (packet->flags & SILC_PACKET_FLAG_LIST)
2839 idata->last_receive = time(NULL);
2840 silc_server_channel_message(server, sock, packet);
2843 case SILC_PACKET_CHANNEL_KEY:
2845 * Received key for channel. As channels are created by the router
2846 * the keys are as well. We will distribute the key to all of our
2847 * locally connected clients on the particular channel. Router
2848 * never receives this channel and thus is ignored.
2850 if (packet->flags & SILC_PACKET_FLAG_LIST)
2852 silc_server_channel_key(server, sock, packet);
2858 case SILC_PACKET_COMMAND:
2860 * Recived command. Processes the command request and allocates the
2861 * command context and calls the command.
2863 if (packet->flags & SILC_PACKET_FLAG_LIST)
2865 silc_server_command_process(server, sock, packet);
2868 case SILC_PACKET_COMMAND_REPLY:
2870 * Received command reply packet. Received command reply to command. It
2871 * may be reply to command sent by us or reply to command sent by client
2872 * that we've routed further.
2874 if (packet->flags & SILC_PACKET_FLAG_LIST)
2876 silc_server_command_reply(server, sock, packet);
2880 * Private Message packets
2882 case SILC_PACKET_PRIVATE_MESSAGE:
2884 * Received private message packet. The packet is coming from either
2887 if (packet->flags & SILC_PACKET_FLAG_LIST)
2889 idata->last_receive = time(NULL);
2890 silc_server_private_message(server, sock, packet);
2893 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2895 * Private message key packet.
2897 if (packet->flags & SILC_PACKET_FLAG_LIST)
2899 silc_server_private_message_key(server, sock, packet);
2903 * Key Exchange protocol packets
2905 case SILC_PACKET_KEY_EXCHANGE:
2906 if (packet->flags & SILC_PACKET_FLAG_LIST)
2909 if (sock->protocol && sock->protocol->protocol &&
2910 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2911 SilcServerKEInternalContext *proto_ctx =
2912 (SilcServerKEInternalContext *)sock->protocol->context;
2914 proto_ctx->packet = silc_packet_context_dup(packet);
2916 /* Let the protocol handle the packet */
2917 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2919 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2920 "protocol active (%s:%d [%s]).", sock->hostname,
2922 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2923 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2924 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2929 case SILC_PACKET_KEY_EXCHANGE_1:
2930 if (packet->flags & SILC_PACKET_FLAG_LIST)
2933 if (sock->protocol && sock->protocol->protocol &&
2934 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2935 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2937 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2938 SilcServerRekeyInternalContext *proto_ctx =
2939 (SilcServerRekeyInternalContext *)sock->protocol->context;
2941 if (proto_ctx->packet)
2942 silc_packet_context_free(proto_ctx->packet);
2944 proto_ctx->packet = silc_packet_context_dup(packet);
2946 /* Let the protocol handle the packet */
2947 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2949 SilcServerKEInternalContext *proto_ctx =
2950 (SilcServerKEInternalContext *)sock->protocol->context;
2952 if (proto_ctx->packet)
2953 silc_packet_context_free(proto_ctx->packet);
2955 proto_ctx->packet = silc_packet_context_dup(packet);
2956 proto_ctx->dest_id_type = packet->src_id_type;
2957 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2958 packet->src_id_type);
2959 if (!proto_ctx->dest_id)
2962 /* Let the protocol handle the packet */
2963 silc_protocol_execute(sock->protocol, server->schedule,
2967 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2968 "protocol active (%s:%d [%s]).", sock->hostname,
2970 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2971 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2972 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2977 case SILC_PACKET_KEY_EXCHANGE_2:
2978 if (packet->flags & SILC_PACKET_FLAG_LIST)
2981 if (sock->protocol && sock->protocol->protocol &&
2982 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2983 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2985 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2986 SilcServerRekeyInternalContext *proto_ctx =
2987 (SilcServerRekeyInternalContext *)sock->protocol->context;
2989 if (proto_ctx->packet)
2990 silc_packet_context_free(proto_ctx->packet);
2992 proto_ctx->packet = silc_packet_context_dup(packet);
2994 /* Let the protocol handle the packet */
2995 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2997 SilcServerKEInternalContext *proto_ctx =
2998 (SilcServerKEInternalContext *)sock->protocol->context;
3000 if (proto_ctx->packet)
3001 silc_packet_context_free(proto_ctx->packet);
3003 proto_ctx->packet = silc_packet_context_dup(packet);
3004 proto_ctx->dest_id_type = packet->src_id_type;
3005 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
3006 packet->src_id_type);
3007 if (!proto_ctx->dest_id)
3010 /* Let the protocol handle the packet */
3011 silc_protocol_execute(sock->protocol, server->schedule,
3015 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
3016 "protocol active (%s:%d [%s]).", sock->hostname,
3018 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3019 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3020 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3025 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
3027 * Connection authentication request packet. When we receive this packet
3028 * we will send to the other end information about our mandatory
3029 * authentication method for the connection. This packet maybe received
3032 if (packet->flags & SILC_PACKET_FLAG_LIST)
3034 silc_server_connection_auth_request(server, sock, packet);
3038 * Connection Authentication protocol packets
3040 case SILC_PACKET_CONNECTION_AUTH:
3041 /* Start of the authentication protocol. We receive here the
3042 authentication data and will verify it. */
3043 if (packet->flags & SILC_PACKET_FLAG_LIST)
3046 if (sock->protocol && sock->protocol->protocol->type
3047 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
3049 SilcServerConnAuthInternalContext *proto_ctx =
3050 (SilcServerConnAuthInternalContext *)sock->protocol->context;
3052 proto_ctx->packet = silc_packet_context_dup(packet);
3054 /* Let the protocol handle the packet */
3055 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
3057 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
3058 "protocol active (%s:%d [%s]).", sock->hostname,
3060 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3061 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3062 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3067 case SILC_PACKET_NEW_ID:
3069 * Received New ID packet. This includes some new ID that has been
3070 * created. It may be for client, server or channel. This is the way
3071 * to distribute information about new registered entities in the
3074 if (packet->flags & SILC_PACKET_FLAG_LIST)
3075 silc_server_new_id_list(server, sock, packet);
3077 silc_server_new_id(server, sock, packet);
3080 case SILC_PACKET_NEW_CLIENT:
3082 * Received new client packet. This includes client information that
3083 * we will use to create initial client ID. After creating new
3084 * ID we will send it to the client.
3086 if (packet->flags & SILC_PACKET_FLAG_LIST)
3088 silc_server_new_client(server, sock, packet);
3091 case SILC_PACKET_NEW_SERVER:
3093 * Received new server packet. This includes Server ID and some other
3094 * information that we may save. This is received after server has
3097 if (packet->flags & SILC_PACKET_FLAG_LIST)
3099 silc_server_new_server(server, sock, packet);
3102 case SILC_PACKET_NEW_CHANNEL:
3104 * Received new channel packet. Information about new channel in the
3105 * network are distributed using this packet.
3107 if (packet->flags & SILC_PACKET_FLAG_LIST)
3108 silc_server_new_channel_list(server, sock, packet);
3110 silc_server_new_channel(server, sock, packet);
3113 case SILC_PACKET_HEARTBEAT:
3115 * Received heartbeat.
3117 if (packet->flags & SILC_PACKET_FLAG_LIST)
3121 case SILC_PACKET_KEY_AGREEMENT:
3123 * Received heartbeat.
3125 if (packet->flags & SILC_PACKET_FLAG_LIST)
3127 silc_server_key_agreement(server, sock, packet);
3130 case SILC_PACKET_REKEY:
3132 * Received re-key packet. The sender wants to regenerate the session
3135 if (packet->flags & SILC_PACKET_FLAG_LIST)
3137 silc_server_rekey(server, sock, packet);
3140 case SILC_PACKET_REKEY_DONE:
3142 * The re-key is done.
3144 if (packet->flags & SILC_PACKET_FLAG_LIST)
3147 if (sock->protocol && sock->protocol->protocol &&
3148 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
3150 SilcServerRekeyInternalContext *proto_ctx =
3151 (SilcServerRekeyInternalContext *)sock->protocol->context;
3153 if (proto_ctx->packet)
3154 silc_packet_context_free(proto_ctx->packet);
3156 proto_ctx->packet = silc_packet_context_dup(packet);
3158 /* Let the protocol handle the packet */
3159 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
3161 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
3162 "protocol active (%s:%d [%s]).", sock->hostname,
3164 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3165 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3166 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3171 case SILC_PACKET_FTP:
3173 if (packet->flags & SILC_PACKET_FLAG_LIST)
3175 silc_server_ftp(server, sock, packet);
3178 case SILC_PACKET_RESUME_CLIENT:
3180 if (packet->flags & SILC_PACKET_FLAG_LIST)
3182 silc_server_resume_client(server, sock, packet);
3185 case SILC_PACKET_RESUME_ROUTER:
3186 /* Resume router packet received. This packet is received for backup
3187 router resuming protocol. */
3188 if (packet->flags & SILC_PACKET_FLAG_LIST)
3190 silc_server_backup_resume_router(server, sock, packet);
3194 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
3199 /* Creates connection to a remote router. */
3201 void silc_server_create_connection(SilcServer server,
3202 const char *remote_host, SilcUInt32 port)
3204 SilcServerConnection sconn;
3206 /* Allocate connection object for hold connection specific stuff. */
3207 sconn = silc_calloc(1, sizeof(*sconn));
3208 sconn->remote_host = strdup(remote_host);
3209 sconn->remote_port = port;
3210 sconn->no_reconnect = TRUE;
3212 silc_schedule_task_add(server->schedule, 0,
3213 silc_server_connect_router,
3214 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
3215 SILC_TASK_PRI_NORMAL);
3218 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3220 SilcServer server = app_context;
3221 SilcSocketConnection sock = context;
3223 SILC_LOG_DEBUG(("Deleting socket %p", sock));
3225 /* Close the actual connection */
3226 silc_net_close_connection(sock->sock);
3227 server->sockets[sock->sock] = NULL;
3228 server->stat.conn_num--;
3230 /* We won't listen for this connection anymore */
3231 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3232 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
3234 silc_socket_free(sock);
3237 /* Closes connection to socket connection */
3239 void silc_server_close_connection(SilcServer server,
3240 SilcSocketConnection sock)
3244 if (SILC_IS_DISCONNECTED(sock)) {
3245 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3246 silc_schedule_task_add(server->schedule, sock->sock,
3247 silc_server_close_connection_final,
3248 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3249 SILC_TASK_PRI_NORMAL);
3250 server->sockets[sock->sock] = NULL;
3254 /* If any protocol is active cancel its execution. It will call
3255 the final callback which will finalize the disconnection. */
3256 if (sock->protocol && sock->protocol->protocol &&
3257 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3258 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3259 silc_protocol_cancel(sock->protocol, server->schedule);
3260 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3261 silc_protocol_execute_final(sock->protocol, server->schedule);
3262 sock->protocol = NULL;
3266 memset(tmp, 0, sizeof(tmp));
3267 silc_socket_get_error(sock, tmp, sizeof(tmp));
3268 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
3270 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3271 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3272 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3273 "Router"), tmp[0] ? tmp : ""));
3275 SILC_SET_DISCONNECTED(sock);
3276 silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
3277 silc_schedule_task_add(server->schedule, sock->sock,
3278 silc_server_close_connection_final,
3279 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3280 SILC_TASK_PRI_NORMAL);
3281 server->sockets[sock->sock] = NULL;
3284 /* Sends disconnect message to remote connection and disconnects the
3285 connection. NOTE: If this is called from protocol callback
3286 then sock->protocol must be set NULL before calling this, since
3287 this routine dispatches protocol callbacks too. */
3289 void silc_server_disconnect_remote(SilcServer server,
3290 SilcSocketConnection sock,
3291 SilcStatus status, ...)
3294 unsigned char buf[512];
3302 if (SILC_IS_DISCONNECTING(sock)) {
3303 SILC_SET_DISCONNECTED(sock);
3304 silc_server_close_connection(server, sock);
3308 memset(buf, 0, sizeof(buf));
3309 va_start(ap, status);
3310 cp = va_arg(ap, char *);
3312 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3317 SILC_LOG_DEBUG(("Disconnecting remote host"));
3319 /* Notify remote end that the conversation is over. The notify message
3320 is tried to be sent immediately. */
3324 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3326 buffer = silc_buffer_alloc_size(len);
3330 buffer->data[0] = status;
3332 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3334 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3335 buffer->data, buffer->len, TRUE);
3336 silc_buffer_free(buffer);
3339 silc_server_packet_queue_purge(server, sock);
3341 /* Mark the connection to be disconnected */
3342 SILC_SET_DISCONNECTING(sock);
3343 silc_server_close_connection(server, sock);
3346 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3348 SilcServer server = app_context;
3349 SilcClientEntry client = context;
3351 assert(!silc_hash_table_count(client->channels));
3353 silc_idlist_del_data(client);
3354 silc_idcache_purge_by_context(server->local_list->clients, client);
3357 /* Frees client data and notifies about client's signoff. */
3359 void silc_server_free_client_data(SilcServer server,
3360 SilcSocketConnection sock,
3361 SilcClientEntry client,
3363 const char *signoff)
3365 SILC_LOG_DEBUG(("Freeing client data"));
3367 /* If there is pending outgoing data for the client then purge it
3368 to the network before removing the client entry. */
3369 silc_server_packet_queue_purge(server, sock);
3372 /* Check if anyone is watching this nickname */
3373 if (server->server_type == SILC_ROUTER)
3374 silc_server_check_watcher_list(server, client, NULL,
3375 SILC_NOTIFY_TYPE_SIGNOFF);
3377 /* Send SIGNOFF notify to routers. */
3379 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3380 SILC_BROADCAST(server), client->id,
3384 /* Remove client from all channels */
3386 silc_server_remove_from_channels(server, NULL, client,
3387 TRUE, (char *)signoff, TRUE, FALSE);
3389 silc_server_remove_from_channels(server, NULL, client,
3390 FALSE, NULL, FALSE, FALSE);
3392 /* Remove this client from watcher list if it is */
3393 silc_server_del_from_watcher_list(server, client);
3395 /* Remove this client from the public key hash list */
3396 if (client->data.public_key)
3397 silc_hash_table_del_by_context(server->pk_hash,
3398 client->data.public_key, client);
3400 /* Update statistics */
3401 server->stat.my_clients--;
3402 server->stat.clients--;
3403 if (server->stat.cell_clients)
3404 server->stat.cell_clients--;
3405 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3406 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3407 silc_schedule_task_del_by_context(server->schedule, client);
3409 /* We will not delete the client entry right away. We will take it
3410 into history (for WHOWAS command) for 5 minutes, unless we're
3411 shutting down server. */
3412 if (!server->server_shutdown) {
3413 silc_schedule_task_add(server->schedule, 0,
3414 silc_server_free_client_data_timeout,
3416 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3417 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3418 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3420 client->router = NULL;
3421 client->connection = NULL;
3423 /* Delete directly since we're shutting down server */
3424 silc_idlist_del_data(client);
3425 silc_idlist_del_client(server->local_list, client);
3429 /* Frees user_data pointer from socket connection object. This also sends
3430 appropriate notify packets to the network to inform about leaving
3433 void silc_server_free_sock_user_data(SilcServer server,
3434 SilcSocketConnection sock,
3435 const char *signoff_message)
3438 /* If any protocol is active cancel its execution */
3439 if (sock->protocol && sock->protocol->protocol &&
3440 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3441 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3442 silc_protocol_cancel(sock->protocol, server->schedule);
3443 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3444 silc_protocol_execute_final(sock->protocol, server->schedule);
3445 sock->protocol = NULL;
3446 if (!sock->user_data)
3450 switch (sock->type) {
3451 case SILC_SOCKET_TYPE_CLIENT:
3453 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3454 silc_server_free_client_data(server, sock, user_data, TRUE,
3458 case SILC_SOCKET_TYPE_SERVER:
3459 case SILC_SOCKET_TYPE_ROUTER:
3461 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3462 SilcServerEntry backup_router = NULL;
3464 SILC_LOG_DEBUG(("Freeing server data"));
3467 backup_router = silc_server_backup_get(server, user_data->id);
3469 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3470 backup_router == server->id_entry &&
3471 sock->type != SILC_SOCKET_TYPE_ROUTER)
3472 backup_router = NULL;
3474 if (server->server_shutdown || server->backup_noswitch)
3475 backup_router = NULL;
3477 /* If this was our primary router connection then we're lost to
3478 the outside world. */
3479 if (server->router == user_data) {
3480 /* Check whether we have a backup router connection */
3481 if (!backup_router || backup_router == user_data) {
3482 if (!server->no_reconnect)
3483 silc_server_create_connections(server);
3484 server->id_entry->router = NULL;
3485 server->router = NULL;
3486 server->standalone = TRUE;
3487 server->backup_primary = FALSE;
3488 backup_router = NULL;
3490 if (server->id_entry != backup_router) {
3491 SILC_LOG_INFO(("New primary router is backup router %s",
3492 backup_router->server_name));
3493 server->id_entry->router = backup_router;
3494 server->router = backup_router;
3495 server->router_connect = time(0);
3496 server->backup_primary = TRUE;
3497 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3499 /* Send START_USE to backup router to indicate we have switched */
3500 silc_server_backup_send_start_use(server,
3501 backup_router->connection,
3504 SILC_LOG_INFO(("We are now new primary router in this cell"));
3505 server->id_entry->router = NULL;
3506 server->router = NULL;
3507 server->standalone = TRUE;
3510 /* We stop here to take a breath */
3513 if (server->backup_router) {
3514 server->server_type = SILC_ROUTER;
3516 /* We'll need to constantly try to reconnect to the primary
3517 router so that we'll see when it comes back online. */
3518 silc_server_backup_reconnect(server, sock->ip, sock->port,
3519 silc_server_backup_connected,
3523 /* Mark this connection as replaced */
3524 silc_server_backup_replaced_add(server, user_data->id,
3527 } else if (backup_router) {
3528 SILC_LOG_INFO(("Enabling the use of backup router %s",
3529 backup_router->server_name));
3531 /* Mark this connection as replaced */
3532 silc_server_backup_replaced_add(server, user_data->id,
3534 } else if (server->server_type == SILC_SERVER &&
3535 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3536 /* Reconnect to the router (backup) */
3537 if (!server->no_reconnect)
3538 silc_server_create_connections(server);
3541 if (user_data->server_name)
3542 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3543 ("Server %s signoff", user_data->server_name));
3545 if (!backup_router) {
3546 /* Remove all servers that are originated from this server, and
3547 remove the clients of those servers too. */
3548 silc_server_remove_servers_by_server(server, user_data, TRUE);
3551 /* Remove the clients that this server owns as they will become
3552 invalid now too. For backup router the server is actually
3553 coming from the primary router, so mark that as the owner
3555 if (server->server_type == SILC_BACKUP_ROUTER &&
3556 sock->type == SILC_SOCKET_TYPE_SERVER)
3557 silc_server_remove_clients_by_server(server, server->router,
3561 silc_server_remove_clients_by_server(server, user_data,
3564 /* Remove channels owned by this server */
3565 if (server->server_type == SILC_SERVER)
3566 silc_server_remove_channels_by_server(server, user_data);
3568 /* Enable local server connections that may be disabled */
3569 silc_server_local_servers_toggle_enabled(server, TRUE);
3571 /* Update the client entries of this server to the new backup
3572 router. If we are the backup router we also resolve the real
3573 servers for the clients. After updating is over this also
3574 removes the clients that this server explicitly owns. */
3575 silc_server_update_clients_by_server(server, user_data,
3576 backup_router, TRUE);
3578 /* If we are router and just lost our primary router (now standlaone)
3579 we remove everything that was behind it, since we don't know
3581 if (server->server_type == SILC_ROUTER && server->standalone)
3582 /* Remove all servers that are originated from this server, and
3583 remove the clients of those servers too. */
3584 silc_server_remove_servers_by_server(server, user_data, TRUE);
3586 /* Finally remove the clients that are explicitly owned by this
3587 server. They go down with the server. */
3588 silc_server_remove_clients_by_server(server, user_data,
3591 /* Update our server cache to use the new backup router too. */
3592 silc_server_update_servers_by_server(server, user_data, backup_router);
3593 if (server->server_type == SILC_SERVER)
3594 silc_server_update_channels_by_server(server, user_data,
3597 /* Send notify about primary router going down to local operators */
3598 if (server->backup_router)
3599 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3600 SILC_NOTIFY_TYPE_NONE,
3601 ("%s switched to backup router %s "
3602 "(we are primary router now)",
3603 server->server_name, server->server_name));
3604 else if (server->router)
3605 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3606 SILC_NOTIFY_TYPE_NONE,
3607 ("%s switched to backup router %s",
3608 server->server_name,
3609 server->router->server_name));
3611 server->backup_noswitch = FALSE;
3613 /* Free the server entry */
3614 silc_server_backup_del(server, user_data);
3615 silc_server_backup_replaced_del(server, user_data);
3616 silc_idlist_del_data(user_data);
3617 if (!silc_idlist_del_server(server->local_list, user_data))
3618 silc_idlist_del_server(server->global_list, user_data);
3619 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3620 server->stat.my_servers--;
3621 server->stat.servers--;
3623 server->stat.my_routers--;
3624 server->stat.routers--;
3626 if (server->server_type == SILC_ROUTER)
3627 server->stat.cell_servers--;
3629 if (backup_router && backup_router != server->id_entry) {
3630 /* Announce all of our stuff that was created about 5 minutes ago.
3631 The backup router knows all the other stuff already. */
3632 if (server->server_type == SILC_ROUTER)
3633 silc_server_announce_servers(server, FALSE, time(0) - 300,
3634 backup_router->connection);
3636 /* Announce our clients and channels to the router */
3637 silc_server_announce_clients(server, time(0) - 300,
3638 backup_router->connection);
3639 silc_server_announce_channels(server, time(0) - 300,
3640 backup_router->connection);
3646 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3648 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3650 silc_idlist_del_data(user_data);
3651 silc_free(user_data);
3656 sock->user_data = NULL;
3659 /* Removes client from all channels it has joined. This is used when client
3660 connection is disconnected. If the client on a channel is last, the
3661 channel is removed as well. This sends the SIGNOFF notify types. */
3663 void silc_server_remove_from_channels(SilcServer server,
3664 SilcSocketConnection sock,
3665 SilcClientEntry client,
3667 const char *signoff_message,
3671 SilcChannelEntry channel;
3672 SilcChannelClientEntry chl;
3673 SilcHashTableList htl;
3674 SilcBuffer clidp = NULL;
3679 if (notify && !client->id)
3682 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3683 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3686 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3691 /* Remove the client from all channels. The client is removed from
3692 the channels' user list. */
3693 silc_hash_table_list(client->channels, &htl);
3694 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3695 channel = chl->channel;
3697 /* Remove channel if this is last client leaving the channel, unless
3698 the channel is permanent. */
3699 if (server->server_type != SILC_SERVER &&
3700 silc_hash_table_count(channel->user_list) < 2) {
3701 silc_server_channel_delete(server, channel);
3705 silc_hash_table_del(client->channels, channel);
3706 silc_hash_table_del(channel->user_list, client);
3707 channel->user_count--;
3709 /* If there is no global users on the channel anymore mark the channel
3710 as local channel. Do not check if the removed client is local client. */
3711 if (server->server_type == SILC_SERVER && channel->global_users &&
3712 chl->client->router && !silc_server_channel_has_global(channel))
3713 channel->global_users = FALSE;
3715 memset(chl, 'A', sizeof(*chl));
3718 /* Update statistics */
3719 if (SILC_IS_LOCAL(client))
3720 server->stat.my_chanclients--;
3721 if (server->server_type == SILC_ROUTER) {
3722 server->stat.cell_chanclients--;
3723 server->stat.chanclients--;
3726 /* If there is not at least one local user on the channel then we don't
3727 need the channel entry anymore, we can remove it safely, unless the
3728 channel is permanent channel */
3729 if (server->server_type == SILC_SERVER &&
3730 !silc_server_channel_has_local(channel)) {
3731 /* Notify about leaving client if this channel has global users. */
3732 if (notify && channel->global_users)
3733 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3734 SILC_NOTIFY_TYPE_SIGNOFF,
3735 signoff_message ? 2 : 1,
3736 clidp->data, clidp->len,
3737 signoff_message, signoff_message ?
3738 strlen(signoff_message) : 0);
3740 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3741 silc_server_channel_delete(server, channel);
3745 /* Send notify to channel about client leaving SILC and channel too */
3747 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3748 SILC_NOTIFY_TYPE_SIGNOFF,
3749 signoff_message ? 2 : 1,
3750 clidp->data, clidp->len,
3751 signoff_message, signoff_message ?
3752 strlen(signoff_message) : 0);
3754 if (killed && clidp) {
3755 /* Remove the client from channel's invite list */
3756 if (channel->invite_list &&
3757 silc_hash_table_count(channel->invite_list)) {
3759 SilcArgumentPayload iargs;
3760 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3762 iargs = silc_argument_payload_parse(ab->data, ab->len, 1);
3763 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3764 silc_buffer_free(ab);
3765 silc_argument_payload_free(iargs);
3769 /* Don't create keys if we are shutting down */
3770 if (server->server_shutdown)
3773 /* Re-generate channel key if needed */
3774 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3775 if (!silc_server_create_channel_key(server, channel, 0))
3778 /* Send the channel key to the channel. The key of course is not sent
3779 to the client who was removed from the channel. */
3780 silc_server_send_channel_key(server, client->connection, channel,
3781 server->server_type == SILC_ROUTER ?
3782 FALSE : !server->standalone);
3786 silc_hash_table_list_reset(&htl);
3788 silc_buffer_free(clidp);
3791 /* Removes client from one channel. This is used for example when client
3792 calls LEAVE command to remove itself from the channel. Returns TRUE
3793 if channel still exists and FALSE if the channel is removed when
3794 last client leaves the channel. If `notify' is FALSE notify messages
3797 bool silc_server_remove_from_one_channel(SilcServer server,
3798 SilcSocketConnection sock,
3799 SilcChannelEntry channel,
3800 SilcClientEntry client,
3803 SilcChannelClientEntry chl;
3806 SILC_LOG_DEBUG(("Removing %s from channel %s",
3807 silc_id_render(client->id, SILC_ID_CLIENT),
3808 channel->channel_name));
3810 /* Get the entry to the channel, if this client is not on the channel
3812 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3815 /* Remove channel if this is last client leaving the channel, unless
3816 the channel is permanent. */
3817 if (server->server_type != SILC_SERVER &&
3818 silc_hash_table_count(channel->user_list) < 2) {
3819 silc_server_channel_delete(server, channel);
3823 silc_hash_table_del(client->channels, channel);
3824 silc_hash_table_del(channel->user_list, client);
3825 channel->user_count--;
3827 /* If there is no global users on the channel anymore mark the channel
3828 as local channel. Do not check if the client is local client. */
3829 if (server->server_type == SILC_SERVER && channel->global_users &&
3830 chl->client->router && !silc_server_channel_has_global(channel))
3831 channel->global_users = FALSE;
3833 memset(chl, 'O', sizeof(*chl));
3836 /* Update statistics */
3837 if (SILC_IS_LOCAL(client))
3838 server->stat.my_chanclients--;
3839 if (server->server_type == SILC_ROUTER) {
3840 server->stat.cell_chanclients--;
3841 server->stat.chanclients--;
3844 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3848 /* If there is not at least one local user on the channel then we don't
3849 need the channel entry anymore, we can remove it safely, unless the
3850 channel is permanent channel */
3851 if (server->server_type == SILC_SERVER &&
3852 !silc_server_channel_has_local(channel)) {
3853 /* Notify about leaving client if this channel has global users. */
3854 if (notify && channel->global_users)
3855 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3856 SILC_NOTIFY_TYPE_LEAVE, 1,
3857 clidp->data, clidp->len);
3859 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3860 silc_server_channel_delete(server, channel);
3861 silc_buffer_free(clidp);
3865 /* Send notify to channel about client leaving the channel */
3867 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3868 SILC_NOTIFY_TYPE_LEAVE, 1,
3869 clidp->data, clidp->len);
3871 silc_buffer_free(clidp);
3875 /* Timeout callback. This is called if connection is idle or for some
3876 other reason is not responding within some period of time. This
3877 disconnects the remote end. */
3879 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3881 SilcServer server = (SilcServer)context;
3882 SilcSocketConnection sock = server->sockets[fd];
3883 SilcProtocolType protocol = 0;
3885 SILC_LOG_DEBUG(("Start"));
3890 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3891 sock->hostname, sock->ip));
3893 /* If we have protocol active we must assure that we call the protocol's
3894 final callback so that all the memory is freed. */
3895 if (sock->protocol && sock->protocol->protocol &&
3896 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3897 protocol = sock->protocol->protocol->type;
3898 silc_protocol_cancel(sock->protocol, server->schedule);
3899 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3900 silc_protocol_execute_final(sock->protocol, server->schedule);
3901 sock->protocol = NULL;
3905 silc_server_disconnect_remote(server, sock,
3907 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3908 SILC_STATUS_ERR_AUTH_FAILED :
3909 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3910 "Connection timeout");
3912 if (sock->user_data)
3913 silc_server_free_sock_user_data(server, sock, NULL);
3916 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3917 function may be used only by router. In real SILC network all channels
3918 are created by routers thus this function is never used by normal
3921 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3922 SilcServerID *router_id,
3928 SilcChannelID *channel_id;
3929 SilcChannelEntry entry;
3933 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3936 cipher = SILC_DEFAULT_CIPHER;
3938 hmac = SILC_DEFAULT_HMAC;
3940 /* Allocate cipher */
3941 if (!silc_cipher_alloc(cipher, &key))
3945 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3946 silc_cipher_free(key);
3950 channel_name = strdup(channel_name);
3952 /* Create the channel ID */
3953 if (!silc_id_create_channel_id(server, router_id, server->rng,
3955 silc_free(channel_name);
3956 silc_cipher_free(key);
3957 silc_hmac_free(newhmac);
3961 /* Create the channel */
3962 entry = silc_idlist_add_channel(server->local_list, channel_name,
3963 SILC_CHANNEL_MODE_NONE, channel_id,
3964 NULL, key, newhmac, 0);
3966 silc_free(channel_name);
3967 silc_cipher_free(key);
3968 silc_hmac_free(newhmac);
3969 silc_free(channel_id);
3973 entry->cipher = strdup(cipher);
3974 entry->hmac_name = strdup(hmac);
3976 /* Now create the actual key material */
3977 if (!silc_server_create_channel_key(server, entry,
3978 silc_cipher_get_key_len(key) / 8)) {
3979 silc_idlist_del_channel(server->local_list, entry);
3983 /* Notify other routers about the new channel. We send the packet
3984 to our primary route. */
3986 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3987 channel_name, entry->id,
3988 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3991 /* Distribute to backup routers */
3992 if (broadcast && server->server_type == SILC_ROUTER) {
3995 SilcUInt32 name_len = strlen(channel_name);
3996 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3997 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3999 packet = silc_channel_payload_encode(channel_name, name_len,
4000 cid, channel_id_len, entry->mode);
4001 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
4002 packet->data, packet->len, FALSE, TRUE);
4004 silc_buffer_free(packet);
4007 server->stat.my_channels++;
4008 if (server->server_type == SILC_ROUTER) {
4009 server->stat.channels++;
4010 server->stat.cell_channels++;
4011 entry->users_resolved = TRUE;
4017 /* Same as above but creates the channel with Channel ID `channel_id. */
4020 silc_server_create_new_channel_with_id(SilcServer server,
4024 SilcChannelID *channel_id,
4027 SilcChannelEntry entry;
4031 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
4034 cipher = SILC_DEFAULT_CIPHER;
4036 hmac = SILC_DEFAULT_HMAC;
4038 /* Allocate cipher */
4039 if (!silc_cipher_alloc(cipher, &key))
4043 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
4044 silc_cipher_free(key);
4048 channel_name = strdup(channel_name);
4050 /* Create the channel */
4051 entry = silc_idlist_add_channel(server->local_list, channel_name,
4052 SILC_CHANNEL_MODE_NONE, channel_id,
4053 NULL, key, newhmac, 0);
4055 silc_cipher_free(key);
4056 silc_hmac_free(newhmac);
4057 silc_free(channel_name);
4061 /* Now create the actual key material */
4062 if (!silc_server_create_channel_key(server, entry,
4063 silc_cipher_get_key_len(key) / 8)) {
4064 silc_idlist_del_channel(server->local_list, entry);
4068 /* Notify other routers about the new channel. We send the packet
4069 to our primary route. */
4071 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
4072 channel_name, entry->id,
4073 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
4076 /* Distribute to backup routers */
4077 if (broadcast && server->server_type == SILC_ROUTER) {
4080 SilcUInt32 name_len = strlen(channel_name);
4081 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
4082 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
4084 packet = silc_channel_payload_encode(channel_name, name_len,
4085 cid, channel_id_len, entry->mode);
4086 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
4087 packet->data, packet->len, FALSE, TRUE);
4089 silc_buffer_free(packet);
4092 server->stat.my_channels++;
4093 if (server->server_type == SILC_ROUTER) {
4094 server->stat.channels++;
4095 server->stat.cell_channels++;
4096 entry->users_resolved = TRUE;
4102 /* Channel's key re-key timeout callback. */
4104 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
4106 SilcServer server = app_context;
4107 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
4111 /* Return now if we are shutting down */
4112 if (server->server_shutdown)
4115 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
4118 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
4121 /* Generates new channel key. This is used to create the initial channel key
4122 but also to re-generate new key for channel. If `key_len' is provided
4123 it is the bytes of the key length. */
4125 bool silc_server_create_channel_key(SilcServer server,
4126 SilcChannelEntry channel,
4130 unsigned char channel_key[32], hash[32];
4133 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
4134 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
4138 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
4140 if (!channel->channel_key)
4141 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
4142 channel->channel_key = NULL;
4148 else if (channel->key_len)
4149 len = channel->key_len / 8;
4151 len = silc_cipher_get_key_len(channel->channel_key) / 8;
4153 /* Create channel key */
4154 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
4157 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
4159 /* Remove old key if exists */
4161 memset(channel->key, 0, channel->key_len / 8);
4162 silc_free(channel->key);
4166 channel->key_len = len * 8;
4167 channel->key = silc_memdup(channel_key, len);
4168 memset(channel_key, 0, sizeof(channel_key));
4170 /* Generate HMAC key from the channel key data and set it */
4172 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4173 memset(channel->key, 0, channel->key_len / 8);
4174 silc_free(channel->key);
4175 channel->channel_key = NULL;
4178 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
4179 silc_hmac_set_key(channel->hmac, hash,
4180 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4181 memset(hash, 0, sizeof(hash));
4183 if (server->server_type == SILC_ROUTER) {
4184 if (!channel->rekey)
4185 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4186 channel->rekey->channel = channel;
4187 channel->rekey->key_len = key_len;
4188 if (channel->rekey->task)
4189 silc_schedule_task_del(server->schedule, channel->rekey->task);
4191 channel->rekey->task =
4192 silc_schedule_task_add(server->schedule, 0,
4193 silc_server_channel_key_rekey,
4194 (void *)channel->rekey,
4195 server->config->channel_rekey_secs, 0,
4197 SILC_TASK_PRI_NORMAL);
4203 /* Saves the channel key found in the encoded `key_payload' buffer. This
4204 function is used when we receive Channel Key Payload and also when we're
4205 processing JOIN command reply. Returns entry to the channel. */
4207 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
4208 SilcBuffer key_payload,
4209 SilcChannelEntry channel)
4211 SilcChannelKeyPayload payload = NULL;
4212 SilcChannelID *id = NULL;
4213 unsigned char *tmp, hash[32];
4217 /* Decode channel key payload */
4218 payload = silc_channel_key_payload_parse(key_payload->data,
4221 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
4226 /* Get the channel entry */
4229 /* Get channel ID */
4230 tmp = silc_channel_key_get_id(payload, &tmp_len);
4231 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
4237 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
4239 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
4241 if (server->server_type == SILC_ROUTER)
4242 SILC_LOG_ERROR(("Received key for non-existent channel %s",
4243 silc_id_render(id, SILC_ID_CHANNEL)));
4249 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4251 tmp = silc_channel_key_get_key(payload, &tmp_len);
4257 cipher = silc_channel_key_get_cipher(payload, NULL);
4263 /* Remove old key if exists */
4265 memset(channel->key, 0, channel->key_len / 8);
4266 silc_free(channel->key);
4267 silc_cipher_free(channel->channel_key);
4270 /* Create new cipher */
4271 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
4272 channel->channel_key = NULL;
4277 if (channel->cipher)
4278 silc_free(channel->cipher);
4279 channel->cipher = strdup(cipher);
4282 channel->key_len = tmp_len * 8;
4283 channel->key = silc_memdup(tmp, tmp_len);
4284 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
4286 /* Generate HMAC key from the channel key data and set it */
4288 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4289 memset(channel->key, 0, channel->key_len / 8);
4290 silc_free(channel->key);
4291 channel->channel_key = NULL;
4294 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4295 silc_hmac_set_key(channel->hmac, hash,
4296 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4298 memset(hash, 0, sizeof(hash));
4299 memset(tmp, 0, tmp_len);
4301 if (server->server_type == SILC_ROUTER) {
4302 if (!channel->rekey)
4303 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4304 channel->rekey->channel = channel;
4305 if (channel->rekey->task)
4306 silc_schedule_task_del(server->schedule, channel->rekey->task);
4308 channel->rekey->task =
4309 silc_schedule_task_add(server->schedule, 0,
4310 silc_server_channel_key_rekey,
4311 (void *)channel->rekey,
4312 server->config->channel_rekey_secs, 0,
4314 SILC_TASK_PRI_NORMAL);
4320 silc_channel_key_payload_free(payload);
4325 /* Heartbeat callback. This function is set as argument for the
4326 silc_socket_set_heartbeat function. The library will call this function
4327 at the set time interval. */
4329 void silc_server_perform_heartbeat(SilcSocketConnection sock,
4332 SilcServer server = hb_context;
4334 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
4335 sock->port, sock->ip));
4337 /* Send the heartbeat */
4338 silc_server_send_heartbeat(server, sock);
4341 /* Returns assembled of all servers in the given ID list. The packet's
4342 form is dictated by the New ID payload. */
4344 static void silc_server_announce_get_servers(SilcServer server,
4345 SilcServerEntry remote,
4347 SilcBuffer *servers,
4348 unsigned long creation_time)
4350 SilcIDCacheList list;
4351 SilcIDCacheEntry id_cache;
4352 SilcServerEntry entry;
4355 /* Go through all clients in the list */
4356 if (silc_idcache_get_all(id_list->servers, &list)) {
4357 if (silc_idcache_list_first(list, &id_cache)) {
4359 entry = (SilcServerEntry)id_cache->context;
4361 /* Do not announce the one we've sending our announcements and
4362 do not announce ourself. Also check the creation time if it's
4364 if ((entry == remote) || (entry == server->id_entry) ||
4365 (creation_time && entry->data.created < creation_time)) {
4366 if (!silc_idcache_list_next(list, &id_cache))
4371 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4373 *servers = silc_buffer_realloc(*servers,
4375 (*servers)->truelen + idp->len :
4377 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4378 silc_buffer_put(*servers, idp->data, idp->len);
4379 silc_buffer_pull(*servers, idp->len);
4380 silc_buffer_free(idp);
4382 if (!silc_idcache_list_next(list, &id_cache))
4387 silc_idcache_list_free(list);
4392 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4398 p = silc_notify_payload_encode(notify, argc, ap);
4404 /* This function is used by router to announce existing servers to our
4405 primary router when we've connected to it. If `creation_time' is non-zero
4406 then only the servers that has been created after the `creation_time'
4407 will be announced. */
4409 void silc_server_announce_servers(SilcServer server, bool global,
4410 unsigned long creation_time,
4411 SilcSocketConnection remote)
4413 SilcBuffer servers = NULL;
4415 SILC_LOG_DEBUG(("Announcing servers"));
4417 /* Get servers in local list */
4418 silc_server_announce_get_servers(server, remote->user_data,
4419 server->local_list, &servers,
4423 /* Get servers in global list */
4424 silc_server_announce_get_servers(server, remote->user_data,
4425 server->global_list, &servers,
4429 silc_buffer_push(servers, servers->data - servers->head);
4430 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4432 /* Send the packet */
4433 silc_server_packet_send(server, remote,
4434 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4435 servers->data, servers->len, TRUE);
4437 silc_buffer_free(servers);
4441 /* Returns assembled packet of all clients in the given ID list. The
4442 packet's form is dictated by the New ID Payload. */
4444 static void silc_server_announce_get_clients(SilcServer server,
4446 SilcBuffer *clients,
4448 unsigned long creation_time)
4450 SilcIDCacheList list;
4451 SilcIDCacheEntry id_cache;
4452 SilcClientEntry client;
4455 unsigned char mode[4];
4457 /* Go through all clients in the list */
4458 if (silc_idcache_get_all(id_list->clients, &list)) {
4459 if (silc_idcache_list_first(list, &id_cache)) {
4461 client = (SilcClientEntry)id_cache->context;
4463 if (creation_time && client->data.created < creation_time) {
4464 if (!silc_idcache_list_next(list, &id_cache))
4468 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4469 if (!silc_idcache_list_next(list, &id_cache))
4473 if (!client->connection && !client->router) {
4474 if (!silc_idcache_list_next(list, &id_cache))
4479 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4481 *clients = silc_buffer_realloc(*clients,
4483 (*clients)->truelen + idp->len :
4485 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4486 silc_buffer_put(*clients, idp->data, idp->len);
4487 silc_buffer_pull(*clients, idp->len);
4489 SILC_PUT32_MSB(client->mode, mode);
4491 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4492 2, idp->data, idp->len,
4494 *umodes = silc_buffer_realloc(*umodes,
4496 (*umodes)->truelen + tmp->len :
4498 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4499 silc_buffer_put(*umodes, tmp->data, tmp->len);
4500 silc_buffer_pull(*umodes, tmp->len);
4501 silc_buffer_free(tmp);
4503 silc_buffer_free(idp);
4505 if (!silc_idcache_list_next(list, &id_cache))
4510 silc_idcache_list_free(list);
4514 /* This function is used to announce our existing clients to our router
4515 when we've connected to it. If `creation_time' is non-zero then only
4516 the clients that has been created after the `creation_time' will be
4519 void silc_server_announce_clients(SilcServer server,
4520 unsigned long creation_time,
4521 SilcSocketConnection remote)
4523 SilcBuffer clients = NULL;
4524 SilcBuffer umodes = NULL;
4526 SILC_LOG_DEBUG(("Announcing clients"));
4528 /* Get clients in local list */
4529 silc_server_announce_get_clients(server, server->local_list,
4530 &clients, &umodes, creation_time);
4532 /* As router we announce our global list as well */
4533 if (server->server_type == SILC_ROUTER)
4534 silc_server_announce_get_clients(server, server->global_list,
4535 &clients, &umodes, creation_time);
4538 silc_buffer_push(clients, clients->data - clients->head);
4539 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4541 /* Send the packet */
4542 silc_server_packet_send(server, remote,
4543 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4544 clients->data, clients->len, TRUE);
4546 silc_buffer_free(clients);
4550 silc_buffer_push(umodes, umodes->data - umodes->head);
4551 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4553 /* Send the packet */
4554 silc_server_packet_send(server, remote,
4555 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4556 umodes->data, umodes->len, TRUE);
4558 silc_buffer_free(umodes);
4562 /* Returns channel's topic for announcing it */
4564 void silc_server_announce_get_channel_topic(SilcServer server,
4565 SilcChannelEntry channel,
4570 if (channel->topic) {
4571 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4572 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4573 chidp->data, chidp->len,
4575 strlen(channel->topic));
4576 silc_buffer_free(chidp);
4580 /* Returns channel's invite and ban lists */
4582 void silc_server_announce_get_inviteban(SilcServer server,
4583 SilcChannelEntry channel,
4587 SilcBuffer list, idp, idp2, tmp2;
4589 SilcHashTableList htl;
4590 const unsigned char a[1] = { 0x03 };
4592 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4594 /* Encode invite list */
4595 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4596 list = silc_buffer_alloc_size(2);
4597 type = silc_hash_table_count(channel->invite_list);
4598 SILC_PUT16_MSB(type, list->data);
4599 silc_hash_table_list(channel->invite_list, &htl);
4600 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4601 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4603 silc_hash_table_list_reset(&htl);
4605 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4607 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4608 idp->data, idp->len,
4609 channel->channel_name,
4610 strlen(channel->channel_name),
4611 idp2->data, idp2->len,
4613 list->data, list->len);
4614 silc_buffer_free(idp2);
4615 silc_buffer_free(list);
4618 /* Encode ban list */
4619 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4620 list = silc_buffer_alloc_size(2);
4621 type = silc_hash_table_count(channel->ban_list);
4622 SILC_PUT16_MSB(type, list->data);
4623 silc_hash_table_list(channel->ban_list, &htl);
4624 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4625 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4627 silc_hash_table_list_reset(&htl);
4630 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4631 idp->data, idp->len,
4633 list->data, list->len);
4634 silc_buffer_free(list);
4637 silc_buffer_free(idp);
4640 /* Returns assembled packets for channel users of the `channel'. */
4642 void silc_server_announce_get_channel_users(SilcServer server,
4643 SilcChannelEntry channel,
4644 SilcBuffer *channel_modes,
4645 SilcBuffer *channel_users,
4646 SilcBuffer *channel_users_modes)
4648 SilcChannelClientEntry chl;
4649 SilcHashTableList htl;
4650 SilcBuffer chidp, clidp, csidp;
4651 SilcBuffer tmp, fkey = NULL, chpklist;
4653 unsigned char mode[4], ulimit[4];
4656 SILC_LOG_DEBUG(("Start"));
4658 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4659 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4660 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4663 SILC_PUT32_MSB(channel->mode, mode);
4664 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4665 SILC_PUT32_MSB(channel->user_limit, ulimit);
4666 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4667 if (channel->founder_key)
4668 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4670 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4671 8, csidp->data, csidp->len,
4674 hmac, hmac ? strlen(hmac) : 0,
4675 channel->passphrase,
4676 channel->passphrase ?
4677 strlen(channel->passphrase) : 0,
4678 fkey ? fkey->data : NULL,
4679 fkey ? fkey->len : 0,
4680 chpklist ? chpklist->data : NULL,
4681 chpklist ? chpklist->len : 0,
4683 SILC_CHANNEL_MODE_ULIMIT ?
4686 SILC_CHANNEL_MODE_ULIMIT ?
4687 sizeof(ulimit) : 0));
4690 silc_buffer_realloc(*channel_modes,
4692 (*channel_modes)->truelen + len : len));
4693 silc_buffer_pull_tail(*channel_modes,
4694 ((*channel_modes)->end -
4695 (*channel_modes)->data));
4696 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4697 silc_buffer_pull(*channel_modes, len);
4698 silc_buffer_free(tmp);
4699 silc_buffer_free(fkey);
4702 /* Now find all users on the channel */
4703 silc_hash_table_list(channel->user_list, &htl);
4704 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4705 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4708 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4709 clidp->data, clidp->len,
4710 chidp->data, chidp->len);
4713 silc_buffer_realloc(*channel_users,
4715 (*channel_users)->truelen + len : len));
4716 silc_buffer_pull_tail(*channel_users,
4717 ((*channel_users)->end -
4718 (*channel_users)->data));
4720 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4721 silc_buffer_pull(*channel_users, len);
4722 silc_buffer_free(tmp);
4724 /* CUMODE notify for mode change on the channel */
4725 SILC_PUT32_MSB(chl->mode, mode);
4726 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4727 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4728 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4729 4, csidp->data, csidp->len,
4731 clidp->data, clidp->len,
4732 fkey ? fkey->data : NULL,
4733 fkey ? fkey->len : 0);
4735 *channel_users_modes =
4736 silc_buffer_realloc(*channel_users_modes,
4737 (*channel_users_modes ?
4738 (*channel_users_modes)->truelen + len : len));
4739 silc_buffer_pull_tail(*channel_users_modes,
4740 ((*channel_users_modes)->end -
4741 (*channel_users_modes)->data));
4743 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4744 silc_buffer_pull(*channel_users_modes, len);
4745 silc_buffer_free(tmp);
4746 silc_buffer_free(fkey);
4748 silc_buffer_free(clidp);
4750 silc_hash_table_list_reset(&htl);
4751 silc_buffer_free(chidp);
4752 silc_buffer_free(csidp);
4755 /* Returns assembled packets for all channels and users on those channels
4756 from the given ID List. The packets are in the form dictated by the
4757 New Channel and New Channel User payloads. */
4759 void silc_server_announce_get_channels(SilcServer server,
4761 SilcBuffer *channels,
4762 SilcBuffer **channel_modes,
4763 SilcBuffer *channel_users,
4764 SilcBuffer **channel_users_modes,
4765 SilcUInt32 *channel_users_modes_c,
4766 SilcBuffer **channel_topics,
4767 SilcBuffer **channel_invites,
4768 SilcBuffer **channel_bans,
4769 SilcChannelID ***channel_ids,
4770 unsigned long creation_time)
4772 SilcIDCacheList list;
4773 SilcIDCacheEntry id_cache;
4774 SilcChannelEntry channel;
4777 SilcUInt16 name_len;
4779 int i = *channel_users_modes_c;
4782 SILC_LOG_DEBUG(("Start"));
4784 /* Go through all channels in the list */
4785 if (silc_idcache_get_all(id_list->channels, &list)) {
4786 if (silc_idcache_list_first(list, &id_cache)) {
4788 channel = (SilcChannelEntry)id_cache->context;
4790 if (creation_time && channel->created < creation_time)
4795 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4796 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4797 name_len = strlen(channel->channel_name);
4800 len = 4 + name_len + id_len + 4;
4802 silc_buffer_realloc(*channels,
4803 (*channels ? (*channels)->truelen +
4805 silc_buffer_pull_tail(*channels,
4806 ((*channels)->end - (*channels)->data));
4807 silc_buffer_format(*channels,
4808 SILC_STR_UI_SHORT(name_len),
4809 SILC_STR_UI_XNSTRING(channel->channel_name,
4811 SILC_STR_UI_SHORT(id_len),
4812 SILC_STR_UI_XNSTRING(cid, id_len),
4813 SILC_STR_UI_INT(channel->mode),
4815 silc_buffer_pull(*channels, len);
4818 if (creation_time && channel->updated < creation_time)
4824 /* Channel user modes */
4825 *channel_users_modes = silc_realloc(*channel_users_modes,
4826 sizeof(**channel_users_modes) *
4828 (*channel_users_modes)[i] = NULL;
4829 *channel_modes = silc_realloc(*channel_modes,
4830 sizeof(**channel_modes) * (i + 1));
4831 (*channel_modes)[i] = NULL;
4832 *channel_ids = silc_realloc(*channel_ids,
4833 sizeof(**channel_ids) * (i + 1));
4834 (*channel_ids)[i] = NULL;
4835 silc_server_announce_get_channel_users(server, channel,
4836 &(*channel_modes)[i],
4838 &(*channel_users_modes)[i]);
4839 (*channel_ids)[i] = channel->id;
4841 /* Channel's topic */
4842 *channel_topics = silc_realloc(*channel_topics,
4843 sizeof(**channel_topics) * (i + 1));
4844 (*channel_topics)[i] = NULL;
4845 silc_server_announce_get_channel_topic(server, channel,
4846 &(*channel_topics)[i]);
4848 /* Channel's invite and ban list */
4849 *channel_invites = silc_realloc(*channel_invites,
4850 sizeof(**channel_invites) * (i + 1));
4851 (*channel_invites)[i] = NULL;
4852 *channel_bans = silc_realloc(*channel_bans,
4853 sizeof(**channel_bans) * (i + 1));
4854 (*channel_bans)[i] = NULL;
4855 silc_server_announce_get_inviteban(server, channel,
4856 &(*channel_invites)[i],
4857 &(*channel_bans)[i]);
4859 (*channel_users_modes_c)++;
4865 if (!silc_idcache_list_next(list, &id_cache))
4870 silc_idcache_list_free(list);
4874 /* This function is used to announce our existing channels to our router
4875 when we've connected to it. This also announces the users on the
4876 channels to the router. If the `creation_time' is non-zero only the
4877 channels that was created after the `creation_time' are announced.
4878 Note that the channel users are still announced even if the `creation_time'
4881 void silc_server_announce_channels(SilcServer server,
4882 unsigned long creation_time,
4883 SilcSocketConnection remote)
4885 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4886 SilcBuffer *channel_users_modes = NULL;
4887 SilcBuffer *channel_topics = NULL;
4888 SilcBuffer *channel_invites = NULL;
4889 SilcBuffer *channel_bans = NULL;
4890 SilcUInt32 channel_users_modes_c = 0;
4891 SilcChannelID **channel_ids = NULL;
4893 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4895 /* Get channels and channel users in local list */
4896 silc_server_announce_get_channels(server, server->local_list,
4897 &channels, &channel_modes,
4899 &channel_users_modes,
4900 &channel_users_modes_c,
4904 &channel_ids, creation_time);
4906 /* Get channels and channel users in global list */
4907 if (server->server_type != SILC_SERVER)
4908 silc_server_announce_get_channels(server, server->global_list,
4909 &channels, &channel_modes,
4911 &channel_users_modes,
4912 &channel_users_modes_c,
4916 &channel_ids, creation_time);
4919 silc_buffer_push(channels, channels->data - channels->head);
4920 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4922 /* Send the packet */
4923 silc_server_packet_send(server, remote,
4924 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4925 channels->data, channels->len,
4928 silc_buffer_free(channels);
4931 if (channel_users) {
4932 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4933 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4934 channel_users->len);
4936 /* Send the packet */
4937 silc_server_packet_send(server, remote,
4938 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4939 channel_users->data, channel_users->len,
4942 silc_buffer_free(channel_users);
4945 if (channel_modes) {
4948 for (i = 0; i < channel_users_modes_c; i++) {
4949 if (!channel_modes[i])
4951 silc_buffer_push(channel_modes[i],
4952 channel_modes[i]->data -
4953 channel_modes[i]->head);
4954 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4955 channel_modes[i]->len);
4956 silc_server_packet_send_dest(server, remote,
4957 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4958 channel_ids[i], SILC_ID_CHANNEL,
4959 channel_modes[i]->data,
4960 channel_modes[i]->len,
4962 silc_buffer_free(channel_modes[i]);
4964 silc_free(channel_modes);
4967 if (channel_users_modes) {
4970 for (i = 0; i < channel_users_modes_c; i++) {
4971 if (!channel_users_modes[i])
4973 silc_buffer_push(channel_users_modes[i],
4974 channel_users_modes[i]->data -
4975 channel_users_modes[i]->head);
4976 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4977 channel_users_modes[i]->len);
4978 silc_server_packet_send_dest(server, remote,
4979 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4980 channel_ids[i], SILC_ID_CHANNEL,
4981 channel_users_modes[i]->data,
4982 channel_users_modes[i]->len,
4984 silc_buffer_free(channel_users_modes[i]);
4986 silc_free(channel_users_modes);
4989 if (channel_topics) {
4992 for (i = 0; i < channel_users_modes_c; i++) {
4993 if (!channel_topics[i])
4996 silc_buffer_push(channel_topics[i],
4997 channel_topics[i]->data -
4998 channel_topics[i]->head);
4999 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
5000 channel_topics[i]->len);
5001 silc_server_packet_send_dest(server, remote,
5002 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
5003 channel_ids[i], SILC_ID_CHANNEL,
5004 channel_topics[i]->data,
5005 channel_topics[i]->len,
5007 silc_buffer_free(channel_topics[i]);
5009 silc_free(channel_topics);
5012 if (channel_invites) {
5015 for (i = 0; i < channel_users_modes_c; i++) {
5016 if (!channel_invites[i])
5019 silc_buffer_push(channel_invites[i],
5020 channel_invites[i]->data -
5021 channel_invites[i]->head);
5022 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
5023 channel_invites[i]->len);
5024 silc_server_packet_send_dest(server, remote,
5025 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
5026 channel_ids[i], SILC_ID_CHANNEL,
5027 channel_invites[i]->data,
5028 channel_invites[i]->len,
5030 silc_buffer_free(channel_invites[i]);
5032 silc_free(channel_invites);
5038 for (i = 0; i < channel_users_modes_c; i++) {
5039 if (!channel_bans[i])
5042 silc_buffer_push(channel_bans[i],
5043 channel_bans[i]->data -
5044 channel_bans[i]->head);
5045 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
5046 channel_bans[i]->len);
5047 silc_server_packet_send_dest(server, remote,
5048 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
5049 channel_ids[i], SILC_ID_CHANNEL,
5050 channel_bans[i]->data,
5051 channel_bans[i]->len,
5053 silc_buffer_free(channel_bans[i]);
5055 silc_free(channel_bans);
5058 silc_free(channel_ids);
5061 /* Announces WATCH list. */
5063 void silc_server_announce_watches(SilcServer server,
5064 SilcSocketConnection remote)
5066 SilcHashTableList htl;
5067 SilcBuffer buffer, idp, args, pkp;
5068 SilcClientEntry client;
5071 SILC_LOG_DEBUG(("Announcing watch list"));
5073 /* XXX because way we save the nicks (hash) we cannot announce them. */
5075 /* XXX we should send all public keys in one command if client is
5076 watching more than one key */
5077 silc_hash_table_list(server->watcher_list_pk, &htl);
5078 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
5079 if (!client || !client->id)
5082 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
5083 args = silc_buffer_alloc_size(2);
5084 silc_buffer_format(args,
5085 SILC_STR_UI_SHORT(1),
5087 pkp = silc_pkcs_public_key_payload_encode(key);
5088 args = silc_argument_payload_encode_one(args, pkp->data, pkp->len, 0x00);
5089 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
5090 ++server->cmd_ident, 2,
5091 1, idp->data, idp->len,
5092 4, args->data, args->len);
5095 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
5096 buffer->data, buffer->len, TRUE);
5098 silc_buffer_free(pkp);
5099 silc_buffer_free(args);
5100 silc_buffer_free(idp);
5101 silc_buffer_free(buffer);
5103 silc_hash_table_list_reset(&htl);
5106 /* Assembles user list and users mode list from the `channel'. */
5108 bool silc_server_get_users_on_channel(SilcServer server,
5109 SilcChannelEntry channel,
5110 SilcBuffer *user_list,
5111 SilcBuffer *mode_list,
5112 SilcUInt32 *user_count)
5114 SilcChannelClientEntry chl;
5115 SilcHashTableList htl;
5116 SilcBuffer client_id_list;
5117 SilcBuffer client_mode_list;
5119 SilcUInt32 list_count = 0, len = 0;
5121 if (!silc_hash_table_count(channel->user_list))
5124 silc_hash_table_list(channel->user_list, &htl);
5125 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
5126 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
5127 silc_hash_table_list_reset(&htl);
5129 client_id_list = silc_buffer_alloc(len);
5131 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
5132 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
5133 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
5135 silc_hash_table_list(channel->user_list, &htl);
5136 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5138 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
5139 silc_buffer_put(client_id_list, idp->data, idp->len);
5140 silc_buffer_pull(client_id_list, idp->len);
5141 silc_buffer_free(idp);
5143 /* Client's mode on channel */
5144 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
5145 silc_buffer_pull(client_mode_list, 4);
5149 silc_hash_table_list_reset(&htl);
5150 silc_buffer_push(client_id_list,
5151 client_id_list->data - client_id_list->head);
5152 silc_buffer_push(client_mode_list,
5153 client_mode_list->data - client_mode_list->head);
5155 *user_list = client_id_list;
5156 *mode_list = client_mode_list;
5157 *user_count = list_count;
5161 /* Saves users and their modes to the `channel'. */
5163 void silc_server_save_users_on_channel(SilcServer server,
5164 SilcSocketConnection sock,
5165 SilcChannelEntry channel,
5166 SilcClientID *noadd,
5167 SilcBuffer user_list,
5168 SilcBuffer mode_list,
5169 SilcUInt32 user_count)
5174 SilcClientID *client_id;
5175 SilcClientEntry client;
5176 SilcIDCacheEntry cache;
5177 SilcChannelClientEntry chl;
5179 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
5180 channel->channel_name));
5182 for (i = 0; i < user_count; i++) {
5184 SILC_GET16_MSB(idp_len, user_list->data + 2);
5186 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
5187 silc_buffer_pull(user_list, idp_len);
5192 SILC_GET32_MSB(mode, mode_list->data);
5193 silc_buffer_pull(mode_list, 4);
5195 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
5196 silc_free(client_id);
5202 /* Check if we have this client cached already. */
5203 client = silc_idlist_find_client_by_id(server->local_list, client_id,
5204 server->server_type, &cache);
5206 client = silc_idlist_find_client_by_id(server->global_list,
5207 client_id, server->server_type,
5210 /* If router did not find such Client ID in its lists then this must
5211 be bogus client or some router in the net is buggy. */
5212 if (server->server_type != SILC_SERVER) {
5213 silc_free(client_id);
5217 /* We don't have that client anywhere, add it. The client is added
5218 to global list since server didn't have it in the lists so it must be
5220 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
5221 silc_id_dup(client_id, SILC_ID_CLIENT),
5222 sock->user_data, NULL, 0);
5224 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5225 silc_free(client_id);
5229 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5234 silc_free(client_id);
5236 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5237 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5238 "%s", channel->channel_name));
5242 if (!silc_server_client_on_channel(client, channel, &chl)) {
5243 /* Client was not on the channel, add it. */
5244 chl = silc_calloc(1, sizeof(*chl));
5245 chl->client = client;
5247 chl->channel = channel;
5248 silc_hash_table_add(channel->user_list, chl->client, chl);
5249 silc_hash_table_add(client->channels, chl->channel, chl);
5250 channel->user_count++;
5258 /* Saves channels and channels user modes to the `client'. Removes
5259 the client from those channels that are not sent in the list but
5262 void silc_server_save_user_channels(SilcServer server,
5263 SilcSocketConnection sock,
5264 SilcClientEntry client,
5265 SilcBuffer channels,
5266 SilcBuffer channels_user_modes)
5269 SilcUInt32 *chumodes;
5270 SilcChannelPayload entry;
5271 SilcChannelEntry channel;
5272 SilcChannelID *channel_id;
5273 SilcChannelClientEntry chl;
5274 SilcHashTable ht = NULL;
5275 SilcHashTableList htl;
5279 if (!channels || !channels_user_modes ||
5280 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5283 ch = silc_channel_payload_parse_list(channels->data, channels->len);
5284 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5286 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5287 NULL, NULL, NULL, TRUE);
5288 silc_dlist_start(ch);
5289 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5290 /* Check if we have this channel, and add it if we don't have it.
5291 Also add the client on the channel unless it is there already. */
5292 channel_id = silc_channel_get_id_parse(entry);
5293 channel = silc_idlist_find_channel_by_id(server->local_list,
5296 channel = silc_idlist_find_channel_by_id(server->global_list,
5299 if (server->server_type != SILC_SERVER) {
5300 silc_free(channel_id);
5305 /* We don't have that channel anywhere, add it. */
5306 name = silc_channel_get_name(entry, NULL);
5307 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5308 channel_id, server->router,
5311 silc_free(channel_id);
5318 channel->mode = silc_channel_get_mode(entry);
5320 /* Add the client on the channel */
5321 if (!silc_server_client_on_channel(client, channel, &chl)) {
5322 chl = silc_calloc(1, sizeof(*chl));
5323 chl->client = client;
5324 chl->mode = chumodes[i++];
5325 chl->channel = channel;
5326 silc_hash_table_add(channel->user_list, chl->client, chl);
5327 silc_hash_table_add(client->channels, chl->channel, chl);
5328 channel->user_count++;
5331 chl->mode = chumodes[i++];
5334 silc_hash_table_add(ht, channel, channel);
5335 silc_free(channel_id);
5337 silc_channel_payload_list_free(ch);
5338 silc_free(chumodes);
5342 /* Go through the list again and remove client from channels that
5343 are no part of the list. */
5345 silc_hash_table_list(client->channels, &htl);
5346 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5347 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5348 silc_hash_table_del(chl->channel->user_list, chl->client);
5349 silc_hash_table_del(chl->client->channels, chl->channel);
5353 silc_hash_table_list_reset(&htl);
5354 silc_hash_table_free(ht);
5356 silc_hash_table_list(client->channels, &htl);
5357 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5358 silc_hash_table_del(chl->channel->user_list, chl->client);
5359 silc_hash_table_del(chl->client->channels, chl->channel);
5362 silc_hash_table_list_reset(&htl);
5366 /* Lookups route to the client indicated by the `id_data'. The connection
5367 object and internal data object is returned. Returns NULL if route
5368 could not be found to the client. If the `client_id' is specified then
5369 it is used and the `id_data' is ignored. */
5371 SilcSocketConnection
5372 silc_server_get_client_route(SilcServer server,
5373 unsigned char *id_data,
5375 SilcClientID *client_id,
5376 SilcIDListData *idata,
5377 SilcClientEntry *client_entry)
5380 SilcClientEntry client;
5382 SILC_LOG_DEBUG(("Start"));
5385 *client_entry = NULL;
5387 /* Decode destination Client ID */
5389 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
5391 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
5395 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5398 /* If the destination belongs to our server we don't have to route
5399 the packet anywhere but to send it to the local destination. */
5400 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5404 /* If we are router and the client has router then the client is in
5405 our cell but not directly connected to us. */
5406 if (server->server_type == SILC_ROUTER && client->router) {
5407 /* We are of course in this case the client's router thus the route
5408 to the client is the server who owns the client. So, we will send
5409 the packet to that server. */
5411 *idata = (SilcIDListData)client->router;
5412 return client->router->connection;
5415 /* Seems that client really is directly connected to us */
5417 *idata = (SilcIDListData)client;
5419 *client_entry = client;
5420 return client->connection;
5423 /* Destination belongs to someone not in this server. If we are normal
5424 server our action is to send the packet to our router. */
5425 if (server->server_type != SILC_ROUTER && !server->standalone) {
5428 *idata = (SilcIDListData)server->router;
5429 return SILC_PRIMARY_ROUTE(server);
5432 /* We are router and we will perform route lookup for the destination
5433 and send the packet to fastest route. */
5434 if (server->server_type == SILC_ROUTER && !server->standalone) {
5435 /* Check first that the ID is valid */
5436 client = silc_idlist_find_client_by_id(server->global_list, id,
5439 SilcSocketConnection dst_sock;
5441 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5444 if (idata && dst_sock)
5445 *idata = (SilcIDListData)dst_sock->user_data;
5454 /* Encodes and returns channel list of channels the `client' has joined.
5455 Secret channels are not put to the list. */
5457 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5458 SilcClientEntry client,
5461 SilcBuffer *user_mode_list)
5463 SilcBuffer buffer = NULL;
5464 SilcChannelEntry channel;
5465 SilcChannelClientEntry chl;
5466 SilcHashTableList htl;
5469 SilcUInt16 name_len;
5473 *user_mode_list = NULL;
5475 silc_hash_table_list(client->channels, &htl);
5476 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5477 channel = chl->channel;
5479 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5481 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5484 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
5485 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
5486 name_len = strlen(channel->channel_name);
5488 len = 4 + name_len + id_len + 4;
5489 buffer = silc_buffer_realloc(buffer,
5490 (buffer ? buffer->truelen + len : len));
5491 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5492 silc_buffer_format(buffer,
5493 SILC_STR_UI_SHORT(name_len),
5494 SILC_STR_UI_XNSTRING(channel->channel_name,
5496 SILC_STR_UI_SHORT(id_len),
5497 SILC_STR_UI_XNSTRING(cid, id_len),
5498 SILC_STR_UI_INT(chl->channel->mode),
5500 silc_buffer_pull(buffer, len);
5503 if (user_mode_list) {
5504 *user_mode_list = silc_buffer_realloc(*user_mode_list,
5506 (*user_mode_list)->truelen + 4 :
5508 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5509 (*user_mode_list)->data));
5510 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5511 silc_buffer_pull(*user_mode_list, 4);
5514 silc_hash_table_list_reset(&htl);
5517 silc_buffer_push(buffer, buffer->data - buffer->head);
5518 if (user_mode_list && *user_mode_list)
5519 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5520 (*user_mode_list)->head));
5525 /* Timeout callback for unsuccessful rekey. The rekey did not go through
5528 SILC_TASK_CALLBACK(silc_server_rekey_timeout)
5530 SilcServerRekeyInternalContext *ctx = context;
5531 SilcServer server = app_context;
5532 SilcSocketConnection sock = ctx->sock;
5534 SILC_LOG_DEBUG(("Timeout occurred in rekey protocol with %s:%d [%s]",
5535 sock->hostname, sock->port,
5536 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5537 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5538 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5541 SILC_LOG_WARNING(("Timeout occurred in rekey protocol with %s:%d [%s]",
5542 sock->hostname, sock->port,
5543 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5544 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5545 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5548 if (sock->protocol) {
5549 silc_protocol_cancel(sock->protocol, server->schedule);
5550 silc_protocol_free(sock->protocol);
5551 sock->protocol = NULL;
5554 silc_packet_context_free(ctx->packet);
5556 silc_ske_free(ctx->ske);
5557 silc_socket_free(sock);
5560 /* Disconnect since we failed to rekey, the keys are probably wrong. */
5561 silc_server_disconnect_remote(server, sock,
5562 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
5563 if (sock->user_data)
5564 silc_server_free_sock_user_data(server, sock, NULL);
5567 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
5568 silc_server_create_connections(server);
5571 /* A timeout callback for the re-key. We will be the initiator of the
5574 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5576 SilcServer server = app_context;
5577 SilcSocketConnection sock = (SilcSocketConnection)context;
5578 SilcIDListData idata = (SilcIDListData)sock->user_data;
5579 SilcProtocol protocol;
5580 SilcServerRekeyInternalContext *proto_ctx;
5585 /* Do not execute rekey with disabled connections, as it would not
5586 go through anyway. */
5587 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
5590 /* If rekey protocol is active already wait for it to finish */
5591 if (sock->protocol && sock->protocol->protocol &&
5592 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)
5595 /* If any other protocol is active do not start this protocol yet. */
5596 if (sock->protocol) {
5597 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
5598 silc_schedule_task_add(server->schedule, sock->sock,
5599 silc_server_rekey_callback,
5600 sock, 60, 0, SILC_TASK_TIMEOUT,
5601 SILC_TASK_PRI_NORMAL);
5605 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
5606 sock->hostname, sock->port,
5607 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5608 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5609 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5612 /* Allocate internal protocol context. This is sent as context
5614 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5615 proto_ctx->server = (void *)server;
5616 proto_ctx->sock = silc_socket_dup(sock);
5617 proto_ctx->responder = FALSE;
5618 proto_ctx->pfs = idata->rekey->pfs;
5620 /* Perform rekey protocol. Will call the final callback after the
5621 protocol is over. */
5622 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5623 &protocol, proto_ctx, silc_server_rekey_final);
5624 sock->protocol = protocol;
5626 /* Register timeout callback in case the rekey does not go through. */
5627 proto_ctx->timeout_task =
5628 silc_schedule_task_add(server->schedule, sock->sock,
5629 silc_server_rekey_timeout,
5631 (idata->rekey->timeout >
5632 server->config->key_exchange_timeout ?
5633 idata->rekey->timeout :
5634 server->config->key_exchange_timeout * 4), 0,
5638 /* Run the protocol */
5639 silc_protocol_execute(protocol, server->schedule, 0, 0);
5642 /* The final callback for the REKEY protocol. This will actually take the
5643 new key material into use. */
5645 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5647 SilcProtocol protocol = (SilcProtocol)context;
5648 SilcServerRekeyInternalContext *ctx =
5649 (SilcServerRekeyInternalContext *)protocol->context;
5650 SilcServer server = (SilcServer)ctx->server;
5651 SilcSocketConnection sock = ctx->sock;
5652 SilcIDListData idata = (SilcIDListData)sock->user_data;
5654 if (ctx->timeout_task)
5655 silc_schedule_task_del(server->schedule, ctx->timeout_task);
5657 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5658 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5659 /* Error occured during protocol */
5660 SILC_LOG_ERROR(("Error occurred during rekey protocol with "
5661 "%s (%s)", sock->hostname, sock->ip));
5662 silc_protocol_cancel(protocol, server->schedule);
5663 silc_protocol_free(protocol);
5664 sock->protocol = NULL;
5666 silc_packet_context_free(ctx->packet);
5668 silc_ske_free(ctx->ske);
5669 silc_socket_free(sock);
5671 silc_server_disconnect_remote(server, sock,
5672 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
5673 if (sock->user_data)
5674 silc_server_free_sock_user_data(server, sock, NULL);
5677 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
5678 silc_server_create_connections(server);
5682 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
5683 sock->hostname, sock->port,
5684 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5685 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5686 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5689 /* Purge the outgoing data queue to assure that all rekey packets really
5690 go to the network before we quit the protocol. */
5691 silc_server_packet_queue_purge(server, sock);
5693 /* Re-register re-key timeout */
5694 if (ctx->responder == FALSE)
5695 silc_schedule_task_add(server->schedule, sock->sock,
5696 silc_server_rekey_callback,
5697 sock, idata->rekey->timeout, 0,
5698 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5701 silc_protocol_free(protocol);
5702 sock->protocol = NULL;
5704 silc_packet_context_free(ctx->packet);
5706 silc_ske_free(ctx->ske);
5707 silc_socket_free(sock);
5711 /* Task callback used to retrieve network statistical information from
5712 router server once in a while. */
5714 SILC_TASK_CALLBACK(silc_server_get_stats)
5716 SilcServer server = (SilcServer)context;
5717 SilcBuffer idp, packet;
5719 if (!server->standalone) {
5720 SILC_LOG_DEBUG(("Retrieving stats from router"));
5721 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5722 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5723 ++server->cmd_ident, 1,
5724 1, idp->data, idp->len);
5725 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5726 SILC_PACKET_COMMAND, 0, packet->data,
5727 packet->len, FALSE);
5728 silc_buffer_free(packet);
5729 silc_buffer_free(idp);
5732 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5733 server, 120, 0, SILC_TASK_TIMEOUT,