5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2003 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);
46 /* Allocates a new SILC server object. This has to be done before the server
47 can be used. After allocation one must call silc_server_init to initialize
48 the server. The new allocated server object is returned to the new_server
51 int silc_server_alloc(SilcServer *new_server)
55 SILC_LOG_DEBUG(("Allocating new server object"));
57 server = silc_calloc(1, sizeof(*server));
58 server->server_type = SILC_SERVER;
59 server->standalone = TRUE;
60 server->local_list = silc_calloc(1, sizeof(*server->local_list));
61 server->global_list = silc_calloc(1, sizeof(*server->global_list));
62 server->pending_commands = silc_dlist_init();
64 server->sim = silc_dlist_init();
72 /* Free's the SILC server object. This is called at the very end before
75 void silc_server_free(SilcServer server)
78 SilcIDCacheEntry cache;
86 silc_dlist_start(server->sim);
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_server_backup_free(server);
97 silc_server_config_unref(&server->config_ref);
99 silc_rng_free(server->rng);
101 silc_pkcs_free(server->pkcs);
102 if (server->public_key)
103 silc_pkcs_public_key_free(server->public_key);
104 if (server->private_key)
105 silc_pkcs_private_key_free(server->private_key);
106 if (server->pending_commands)
107 silc_dlist_uninit(server->pending_commands);
108 if (server->id_entry)
109 silc_idlist_del_server(server->local_list, server->id_entry);
111 /* Delete all channels */
113 if (silc_idcache_get_all(server->local_list->channels, &list) &&
114 silc_idcache_list_first(list, &cache)) {
115 silc_idlist_del_channel(server->local_list, cache->context);
116 while (silc_idcache_list_next(list, &cache))
117 silc_idlist_del_channel(server->local_list, cache->context);
120 silc_idcache_list_free(list);
122 if (silc_idcache_get_all(server->global_list->channels, &list) &&
123 silc_idcache_list_first(list, &cache)) {
124 silc_idlist_del_channel(server->global_list, cache->context);
125 while (silc_idcache_list_next(list, &cache))
126 silc_idlist_del_channel(server->global_list, cache->context);
129 silc_idcache_list_free(list);
131 /* Delete all clients */
133 if (silc_idcache_get_all(server->local_list->clients, &list) &&
134 silc_idcache_list_first(list, &cache)) {
135 silc_idlist_del_client(server->local_list, cache->context);
136 while (silc_idcache_list_next(list, &cache))
137 silc_idlist_del_client(server->local_list, cache->context);
140 silc_idcache_list_free(list);
142 if (silc_idcache_get_all(server->global_list->clients, &list) &&
143 silc_idcache_list_first(list, &cache)) {
144 silc_idlist_del_client(server->global_list, cache->context);
145 while (silc_idcache_list_next(list, &cache))
146 silc_idlist_del_client(server->global_list, cache->context);
149 silc_idcache_list_free(list);
151 /* Delete all servers */
153 if (silc_idcache_get_all(server->local_list->servers, &list) &&
154 silc_idcache_list_first(list, &cache)) {
155 silc_idlist_del_server(server->local_list, cache->context);
156 while (silc_idcache_list_next(list, &cache))
157 silc_idlist_del_server(server->local_list, cache->context);
160 silc_idcache_list_free(list);
162 if (silc_idcache_get_all(server->global_list->servers, &list) &&
163 silc_idcache_list_first(list, &cache)) {
164 silc_idlist_del_server(server->global_list, cache->context);
165 while (silc_idcache_list_next(list, &cache))
166 silc_idlist_del_server(server->global_list, cache->context);
169 silc_idcache_list_free(list);
171 silc_idcache_free(server->local_list->clients);
172 silc_idcache_free(server->local_list->servers);
173 silc_idcache_free(server->local_list->channels);
174 silc_idcache_free(server->global_list->clients);
175 silc_idcache_free(server->global_list->servers);
176 silc_idcache_free(server->global_list->channels);
177 silc_hash_table_free(server->watcher_list);
179 silc_hash_free(server->md5hash);
180 silc_hash_free(server->sha1hash);
181 silc_hmac_unregister_all();
182 silc_hash_unregister_all();
183 silc_cipher_unregister_all();
184 silc_pkcs_unregister_all();
186 silc_free(server->local_list);
187 silc_free(server->global_list);
188 silc_free(server->server_name);
189 silc_free(server->id_string);
190 silc_free(server->purge_i);
191 silc_free(server->purge_g);
195 /* Creates a new server listener. */
197 static bool silc_server_listen(SilcServer server, const char *server_ip,
198 SilcUInt16 port, int *sock)
200 *sock = silc_net_create_server(port, server_ip);
202 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
209 /* Adds a secondary listener. */
211 bool silc_server_init_secondary(SilcServer server)
213 int sock = 0, sock_list[server->config->param.connections_max];
214 SilcSocketConnection newsocket = NULL;
215 SilcServerConfigServerInfoInterface *interface;
217 for (interface = server->config->server_info->secondary; interface;
218 interface = interface->next, sock++) {
220 if (!silc_server_listen(server,
221 interface->server_ip, interface->port, &sock_list[sock]))
224 /* Set socket to non-blocking mode */
225 silc_net_set_socket_nonblock(sock_list[sock]);
227 /* Add ourselves also to the socket table. The entry allocated above
228 is sent as argument for fast referencing in the future. */
229 silc_socket_alloc(sock_list[sock],
230 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
231 server->sockets[sock_list[sock]] = newsocket;
232 SILC_SET_LISTENER(newsocket);
234 /* Perform name and address lookups to resolve the listenning address
236 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
238 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
240 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
241 newsocket->hostname ? newsocket->hostname :
242 newsocket->ip ? newsocket->ip : ""));
243 server->stat.conn_failures++;
246 if (!newsocket->hostname)
247 newsocket->hostname = strdup(newsocket->ip);
249 newsocket->port = silc_net_get_local_port(sock);
251 newsocket->user_data = (void *)server->id_entry;
252 silc_schedule_task_add(server->schedule, sock_list[sock],
253 silc_server_accept_new_connection,
254 (void *)server, 0, 0,
256 SILC_TASK_PRI_NORMAL);
262 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
266 /* Initializes the entire SILC server. This is called always before running
267 the server. This is called only once at the initialization of the program.
268 This binds the server to its listenning port. After this function returns
269 one should call silc_server_run to start the server. This returns TRUE
270 when everything is ok to run the server. Configuration file must be
271 read and parsed before calling this. */
273 bool silc_server_init(SilcServer server)
277 SilcServerEntry id_entry;
278 SilcIDListPurge purge;
279 SilcSocketConnection newsocket = NULL;
281 SILC_LOG_DEBUG(("Initializing server"));
283 server->starttime = time(NULL);
285 /* Take config object for us */
286 silc_server_config_ref(&server->config_ref, server->config,
290 /* Set debugging on if configured */
291 if (server->config->debug_string) {
293 silc_log_set_debug_string(server->config->debug_string);
295 #endif /* SILC_DEBUG */
297 /* Steal public and private key from the config object */
298 server->public_key = server->config->server_info->public_key;
299 server->private_key = server->config->server_info->private_key;
300 server->config->server_info->public_key = NULL;
301 server->config->server_info->private_key = NULL;
303 /* Register all configured ciphers, PKCS and hash functions. */
304 if (!silc_server_config_register_ciphers(server))
305 silc_cipher_register_default();
306 if (!silc_server_config_register_pkcs(server))
307 silc_pkcs_register_default();
308 if (!silc_server_config_register_hashfuncs(server))
309 silc_hash_register_default();
310 if (!silc_server_config_register_hmacs(server))
311 silc_hmac_register_default();
313 /* Initialize random number generator for the server. */
314 server->rng = silc_rng_alloc();
315 silc_rng_init(server->rng);
316 silc_rng_global_init(server->rng);
318 /* Initialize hash functions for server to use */
319 silc_hash_alloc("md5", &server->md5hash);
320 silc_hash_alloc("sha1", &server->sha1hash);
322 /* Allocate PKCS context for local public and private keys */
323 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
325 silc_pkcs_public_key_set(server->pkcs, server->public_key);
326 silc_pkcs_private_key_set(server->pkcs, server->private_key);
328 /* Initialize the scheduler */
329 server->schedule = silc_schedule_init(server->config->param.connections_max,
331 if (!server->schedule)
334 /* First, register log files configuration for error output */
335 silc_server_config_setlogfiles(server);
337 /* Initialize ID caches */
338 server->local_list->clients =
339 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
340 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
341 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
343 /* These are allocated for normal server as well as these hold some
344 global information that the server has fetched from its router. For
345 router these are used as they are supposed to be used on router. */
346 server->global_list->clients =
347 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
348 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
349 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
351 /* Init watcher list */
352 server->watcher_list =
353 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
354 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
356 if (!server->watcher_list)
359 /* Create a listening server */
360 if (!silc_server_listen(server,
361 server->config->server_info->primary == NULL ? NULL :
362 server->config->server_info->primary->server_ip,
363 server->config->server_info->primary == NULL ? 0 :
364 server->config->server_info->primary->port,
368 /* Set socket to non-blocking mode */
369 silc_net_set_socket_nonblock(sock);
372 /* Allocate the entire socket list that is used in server. Eventually
373 all connections will have entry in this table (it is a table of
374 pointers to the actual object that is allocated individually
376 server->sockets = silc_calloc(server->config->param.connections_max,
377 sizeof(*server->sockets));
378 if (!server->sockets)
381 /* Add ourselves also to the socket table. The entry allocated above
382 is sent as argument for fast referencing in the future. */
383 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
384 server->sockets[sock] = newsocket;
385 SILC_SET_LISTENER(newsocket);
387 /* Perform name and address lookups to resolve the listenning address
389 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
391 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
393 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
394 newsocket->hostname ? newsocket->hostname :
395 newsocket->ip ? newsocket->ip : ""));
396 server->stat.conn_failures++;
399 if (!newsocket->hostname)
400 newsocket->hostname = strdup(newsocket->ip);
402 newsocket->port = silc_net_get_local_port(sock);
404 /* Create a Server ID for the server. */
405 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
410 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
411 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
412 server->server_name = server->config->server_info->server_name;
413 server->config->server_info->server_name = NULL;
415 /* Add ourselves to the server list. We don't have a router yet
416 beacuse we haven't established a route yet. It will be done later.
417 For now, NULL is sent as router. This allocates new entry to
420 silc_idlist_add_server(server->local_list, strdup(server->server_name),
421 server->server_type, server->id, NULL, NULL);
423 SILC_LOG_ERROR(("Could not add ourselves to cache"));
426 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
428 /* Put the allocated socket pointer also to the entry allocated above
429 for fast back-referencing to the socket list. */
430 newsocket->user_data = (void *)id_entry;
431 id_entry->connection = (void *)newsocket;
432 server->id_entry = id_entry;
434 /* Register protocols */
435 silc_server_protocols_register();
437 /* Create connections to configured routers. */
438 silc_server_create_connections(server);
440 /* Add listener task to the scheduler. This task receives new connections
441 to the server. This task remains on the queue until the end of the
443 silc_schedule_task_add(server->schedule, sock,
444 silc_server_accept_new_connection,
445 (void *)server, 0, 0,
447 SILC_TASK_PRI_NORMAL);
449 if (silc_server_init_secondary(server) == FALSE)
452 server->listenning = TRUE;
454 /* If server connections has been configured then we must be router as
455 normal server cannot have server connections, only router connections. */
456 if (server->config->servers) {
457 SilcServerConfigServer *ptr = server->config->servers;
459 server->server_type = SILC_ROUTER;
461 if (ptr->backup_router) {
462 server->server_type = SILC_BACKUP_ROUTER;
463 server->backup_router = TRUE;
464 server->id_entry->server_type = SILC_BACKUP_ROUTER;
471 /* Register the ID Cache purge task. This periodically purges the ID cache
472 and removes the expired cache entries. */
474 /* Clients local list */
475 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
476 purge->cache = server->local_list->clients;
477 purge->timeout = 600;
478 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
479 (void *)purge, purge->timeout, 0,
480 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
482 /* Clients global list */
483 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
484 purge->cache = server->global_list->clients;
485 purge->timeout = 300;
486 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
487 (void *)purge, purge->timeout, 0,
488 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
490 /* If we are normal server we'll retrieve network statisticial information
491 once in a while from the router. */
492 if (server->server_type != SILC_ROUTER)
493 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
494 server, 10, 0, SILC_TASK_TIMEOUT,
497 if (server->server_type == SILC_ROUTER)
498 server->stat.routers++;
500 SILC_LOG_DEBUG(("Server initialized"));
502 /* We are done here, return succesfully */
506 silc_server_config_unref(&server->config_ref);
507 silc_net_close_server(sock);
511 /* Task callback to close a socket connection after rehash */
513 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
515 SilcServer server = context;
516 SilcSocketConnection sock = server->sockets[fd];
521 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
522 sock->hostname, sock->port,
523 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
524 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
525 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
527 silc_schedule_task_del_by_context(server->schedule, sock);
528 silc_server_disconnect_remote(server, sock,
529 SILC_STATUS_ERR_BANNED_FROM_SERVER,
530 "This connection is removed from "
533 silc_server_free_sock_user_data(server, sock, NULL);
536 /* This function basically reads the config file again and switches the config
537 object pointed by the server object. After that, we have to fix various
538 things such as the server_name and the listening ports.
539 Keep in mind that we no longer have the root privileges at this point. */
541 bool silc_server_rehash(SilcServer server)
543 SilcServerConfig newconfig;
545 SILC_LOG_INFO(("Rehashing server"));
547 /* Reset the logging system */
548 silc_log_quick = TRUE;
549 silc_log_flush_all();
551 /* Start the main rehash phase (read again the config file) */
552 newconfig = silc_server_config_alloc(server->config_file);
554 SILC_LOG_ERROR(("Rehash FAILED."));
558 /* Reinit scheduler if necessary */
559 if (newconfig->param.connections_max > server->config->param.connections_max)
560 if (!silc_schedule_reinit(server->schedule,
561 newconfig->param.connections_max))
564 /* Fix the server_name field */
565 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
566 silc_free(server->server_name);
567 server->server_name = newconfig->server_info->server_name;
568 newconfig->server_info->server_name = NULL;
570 /* Update the idcache list with a fresh pointer */
571 silc_free(server->id_entry->server_name);
572 server->id_entry->server_name = strdup(server->server_name);
573 if (!silc_idcache_del_by_context(server->local_list->servers,
576 if (!silc_idcache_add(server->local_list->servers,
577 server->id_entry->server_name,
578 server->id_entry->id, server->id_entry, 0, NULL))
583 silc_server_config_setlogfiles(server);
585 /* Change new key pair if necessary */
586 if (newconfig->server_info->public_key &&
587 !silc_pkcs_public_key_compare(server->public_key,
588 newconfig->server_info->public_key)) {
589 silc_pkcs_public_key_free(server->public_key);
590 silc_pkcs_private_key_free(server->private_key);
591 server->public_key = newconfig->server_info->public_key;
592 server->private_key = newconfig->server_info->private_key;
593 newconfig->server_info->public_key = NULL;
594 newconfig->server_info->private_key = NULL;
596 /* Allocate PKCS context for local public and private keys */
597 silc_pkcs_free(server->pkcs);
598 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
600 silc_pkcs_public_key_set(server->pkcs, server->public_key);
601 silc_pkcs_private_key_set(server->pkcs, server->private_key);
604 /* Check for unconfigured server and router connections and close
605 connections that were unconfigured. */
607 if (server->config->routers) {
608 SilcServerConfigRouter *ptr;
609 SilcServerConfigRouter *newptr;
612 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
615 /* Check whether new config has this one too */
616 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
617 if (silc_string_compare(newptr->host, ptr->host) &&
618 newptr->port == ptr->port &&
619 newptr->initiator == ptr->initiator) {
625 if (!found && ptr->host) {
626 /* Remove this connection */
627 SilcSocketConnection sock;
628 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
629 ptr->host, ptr->port);
630 if (sock && !SILC_IS_LISTENER(sock))
631 silc_schedule_task_add(server->schedule, sock->sock,
632 silc_server_rehash_close_connection,
633 server, 0, 1, SILC_TASK_TIMEOUT,
634 SILC_TASK_PRI_NORMAL);
639 if (server->config->servers) {
640 SilcServerConfigServer *ptr;
641 SilcServerConfigServer *newptr;
644 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
647 /* Check whether new config has this one too */
648 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
649 if (silc_string_compare(newptr->host, ptr->host)) {
655 if (!found && ptr->host) {
656 /* Remove this connection */
657 SilcSocketConnection sock;
658 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
660 if (sock && !SILC_IS_LISTENER(sock))
661 silc_schedule_task_add(server->schedule, sock->sock,
662 silc_server_rehash_close_connection,
663 server, 0, 1, SILC_TASK_TIMEOUT,
664 SILC_TASK_PRI_NORMAL);
669 if (server->config->clients) {
670 SilcServerConfigClient *ptr;
671 SilcServerConfigClient *newptr;
674 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
677 /* Check whether new config has this one too */
678 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
679 if (silc_string_compare(newptr->host, ptr->host)) {
685 if (!found && ptr->host) {
686 /* Remove this connection */
687 SilcSocketConnection sock;
688 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
691 silc_schedule_task_add(server->schedule, sock->sock,
692 silc_server_rehash_close_connection,
693 server, 0, 1, SILC_TASK_TIMEOUT,
694 SILC_TASK_PRI_NORMAL);
699 /* Create connections after rehash */
700 silc_server_create_connections(server);
702 /* Check whether our router status has changed */
703 if (newconfig->servers) {
704 SilcServerConfigServer *ptr = newconfig->servers;
706 server->server_type = SILC_ROUTER;
708 if (ptr->backup_router) {
709 server->server_type = SILC_BACKUP_ROUTER;
710 server->backup_router = TRUE;
711 server->id_entry->server_type = SILC_BACKUP_ROUTER;
718 /* Our old config is gone now. We'll unreference our reference made in
719 silc_server_init and then destroy it since we are destroying it
720 underneath the application (layer which called silc_server_init). */
721 silc_server_config_unref(&server->config_ref);
722 silc_server_config_destroy(server->config);
724 /* Take new config context */
725 server->config = newconfig;
726 silc_server_config_ref(&server->config_ref, server->config, server->config);
729 /* Set debugging on if configured */
730 if (server->config->debug_string) {
732 silc_log_set_debug_string(server->config->debug_string);
736 #endif /* SILC_DEBUG */
738 SILC_LOG_DEBUG(("Server rehashed"));
743 /* The heart of the server. This runs the scheduler thus runs the server.
744 When this returns the server has been stopped and the program will
747 void silc_server_run(SilcServer server)
749 SILC_LOG_INFO(("SILC Server started"));
751 /* Start the scheduler, the heart of the SILC server. When this returns
752 the program will be terminated. */
753 silc_schedule(server->schedule);
756 /* Stops the SILC server. This function is used to shutdown the server.
757 This is usually called after the scheduler has returned. After stopping
758 the server one should call silc_server_free. */
760 void silc_server_stop(SilcServer server)
762 SILC_LOG_INFO(("SILC Server shutting down"));
764 if (server->schedule) {
767 server->server_shutdown = TRUE;
769 /* Close all connections */
770 for (i = 0; i < server->config->param.connections_max; i++) {
771 if (!server->sockets[i])
773 if (!SILC_IS_LISTENER(server->sockets[i])) {
774 SilcSocketConnection sock = server->sockets[i];
775 SilcIDListData idata = sock->user_data;
778 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
780 silc_schedule_task_del_by_context(server->schedule,
782 silc_schedule_task_del_by_fd(server->schedule,
783 server->sockets[i]->sock);
784 silc_server_disconnect_remote(server, server->sockets[i],
786 "Server is shutting down");
787 if (server->sockets[i]) {
789 silc_server_free_sock_user_data(server, sock,
790 "Server is shutting down");
791 silc_socket_free(sock);
794 silc_socket_free(server->sockets[i]);
795 server->sockets[i] = NULL;
799 /* We are not connected to network anymore */
800 server->standalone = TRUE;
802 silc_schedule_stop(server->schedule);
803 silc_schedule_uninit(server->schedule);
804 server->schedule = NULL;
806 silc_free(server->sockets);
807 server->sockets = NULL;
810 silc_server_protocols_unregister();
812 SILC_LOG_DEBUG(("Server stopped"));
815 /* Function that is called when the network connection to a router has
816 been established. This will continue with the key exchange protocol
817 with the remote router. */
819 void silc_server_start_key_exchange(SilcServer server,
820 SilcServerConnection sconn,
823 SilcSocketConnection newsocket;
824 SilcProtocol protocol;
825 SilcServerKEInternalContext *proto_ctx;
826 SilcServerConfigRouter *conn =
827 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
830 /* Cancel any possible retry timeouts */
831 silc_schedule_task_del_by_callback(server->schedule,
832 silc_server_connect_to_router_retry);
834 /* Set socket options */
835 silc_net_set_socket_nonblock(sock);
836 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
838 /* Create socket connection for the connection. Even though we
839 know that we are connecting to a router we will mark the socket
840 to be unknown connection until we have executed authentication
842 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
843 server->sockets[sock] = newsocket;
844 newsocket->hostname = strdup(sconn->remote_host);
845 newsocket->ip = strdup(sconn->remote_host);
846 newsocket->port = sconn->remote_port;
847 sconn->sock = newsocket;
849 /* Allocate internal protocol context. This is sent as context
851 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
852 proto_ctx->server = (void *)server;
853 proto_ctx->context = (void *)sconn;
854 proto_ctx->sock = newsocket;
855 proto_ctx->rng = server->rng;
856 proto_ctx->responder = FALSE;
858 /* Set Key Exchange flags from configuration, but fall back to global
860 SILC_GET_SKE_FLAGS(conn, proto_ctx);
861 if (server->config->param.key_exchange_pfs)
862 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
864 /* Perform key exchange protocol. silc_server_connect_to_router_second
865 will be called after the protocol is finished. */
866 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
867 &protocol, proto_ctx,
868 silc_server_connect_to_router_second);
869 newsocket->protocol = protocol;
871 /* Register a timeout task that will be executed if the protocol
872 is not executed within set limit. */
873 proto_ctx->timeout_task =
874 silc_schedule_task_add(server->schedule, sock,
875 silc_server_timeout_remote,
876 server, server->config->key_exchange_timeout, 0,
880 /* Register the connection for network input and output. This sets
881 that scheduler will listen for incoming packets for this connection
882 and sets that outgoing packets may be sent to this connection as
883 well. However, this doesn't set the scheduler for outgoing traffic,
884 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
885 later when outgoing data is available. */
886 context = (void *)server;
887 SILC_REGISTER_CONNECTION_FOR_IO(sock);
889 /* Run the protocol */
890 silc_protocol_execute(protocol, server->schedule, 0, 0);
893 /* Timeout callback that will be called to retry connecting to remote
894 router. This is used by both normal and router server. This will wait
895 before retrying the connecting. The timeout is generated by exponential
896 backoff algorithm. */
898 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
900 SilcServer server = app_context;
901 SilcServerConnection sconn = (SilcServerConnection)context;
902 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
903 SilcServerConfigConnParams *param =
904 (conn->param ? conn->param : &server->config->param);
906 /* Don't retry if we are shutting down. */
907 if (server->server_shutdown) {
908 silc_server_config_unref(&sconn->conn);
909 silc_free(sconn->remote_host);
910 silc_free(sconn->backup_replace_ip);
915 SILC_LOG_INFO(("Retrying connecting to a router"));
917 /* Calculate next timeout */
918 if (sconn->retry_count >= 1) {
919 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
920 if (sconn->retry_timeout > param->reconnect_interval_max)
921 sconn->retry_timeout = param->reconnect_interval_max;
923 sconn->retry_timeout = param->reconnect_interval;
925 sconn->retry_count++;
926 sconn->retry_timeout = sconn->retry_timeout +
927 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
929 /* If we've reached max retry count, give up. */
930 if ((sconn->retry_count > param->reconnect_count) &&
931 !param->reconnect_keep_trying) {
932 SILC_LOG_ERROR(("Could not connect to router, giving up"));
933 silc_server_config_unref(&sconn->conn);
934 silc_free(sconn->remote_host);
935 silc_free(sconn->backup_replace_ip);
940 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
941 sconn->retry_timeout));
943 /* We will lookup a fresh pointer later */
944 silc_server_config_unref(&sconn->conn);
946 /* Wait one before retrying */
947 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
948 context, sconn->retry_timeout, 0,
949 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
952 /* Generic routine to use connect to a router. */
954 SILC_TASK_CALLBACK(silc_server_connect_router)
956 SilcServer server = app_context;
957 SilcServerConnection sconn = (SilcServerConnection)context;
958 SilcServerConfigRouter *rconn;
961 /* Don't connect if we are shutting down. */
962 if (server->server_shutdown) {
963 silc_free(sconn->remote_host);
964 silc_free(sconn->backup_replace_ip);
969 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
970 (sconn->backup ? "backup router" : "router"),
971 sconn->remote_host, sconn->remote_port));
973 server->router_connect = time(NULL);
974 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
977 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
978 (sconn->backup ? "backup router" : "router"),
979 sconn->remote_host, sconn->remote_port));
980 silc_free(sconn->remote_host);
981 silc_free(sconn->backup_replace_ip);
985 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
987 /* Connect to remote host */
988 sock = silc_net_create_connection(
989 (!server->config->server_info->primary ? NULL :
990 server->config->server_info->primary->server_ip),
991 sconn->remote_port, sconn->remote_host);
993 SILC_LOG_ERROR(("Could not connect to router %s:%d",
994 sconn->remote_host, sconn->remote_port));
995 if (!sconn->no_reconnect)
996 silc_schedule_task_add(server->schedule, 0,
997 silc_server_connect_to_router_retry,
998 context, 0, 1, SILC_TASK_TIMEOUT,
999 SILC_TASK_PRI_NORMAL);
1001 silc_server_config_unref(&sconn->conn);
1002 silc_free(sconn->remote_host);
1003 silc_free(sconn->backup_replace_ip);
1009 /* Continue with key exchange protocol */
1010 silc_server_start_key_exchange(server, sconn, sock);
1013 /* This function connects to our primary router or if we are a router this
1014 establishes all our primary routes. This is called at the start of the
1015 server to do authentication and key exchange with our router - called
1018 SILC_TASK_CALLBACK_GLOBAL(silc_server_connect_to_router)
1020 SilcServer server = (SilcServer)context;
1021 SilcServerConnection sconn;
1022 SilcServerConfigRouter *ptr;
1024 /* Don't connect if we are shutting down. */
1025 if (server->server_shutdown)
1028 SILC_LOG_DEBUG(("We are %s",
1029 (server->server_type == SILC_SERVER ?
1030 "normal server" : server->server_type == SILC_ROUTER ?
1031 "router" : "backup router/normal server")));
1033 if (!server->config->routers) {
1034 /* There wasn't a configured router, we will continue but we don't
1035 have a connection to outside world. We will be standalone server. */
1036 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1037 server->standalone = TRUE;
1041 /* Cancel any possible retry timeouts */
1042 silc_schedule_task_del_by_callback(server->schedule,
1043 silc_server_connect_router);
1044 silc_schedule_task_del_by_callback(server->schedule,
1045 silc_server_connect_to_router_retry);
1047 /* Create the connections to all our routes */
1048 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1050 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1051 ptr->backup_router ? "Backup router" : "Router",
1052 ptr->initiator ? "Initiator" : "Responder",
1053 ptr->host, ptr->port));
1055 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1056 ptr->initiator == FALSE && !server->backup_router &&
1057 !silc_server_config_get_backup_router(server))
1058 server->wait_backup = TRUE;
1060 if (ptr->initiator) {
1061 /* Check whether we are connecting or connected to this host already */
1062 if (silc_server_num_sockets_by_remote(server,
1063 silc_net_is_ip(ptr->host) ?
1065 silc_net_is_ip(ptr->host) ?
1066 NULL : ptr->host, ptr->port,
1067 SILC_SOCKET_TYPE_ROUTER)) {
1068 SILC_LOG_DEBUG(("We are already connected to this router"));
1070 /* If we don't have primary router and this connection is our
1071 primary router we are in desync. Reconnect to the primary. */
1072 if (server->standalone && !server->router) {
1073 SilcServerConfigRouter *primary =
1074 silc_server_config_get_primary_router(server);
1075 if (primary == ptr) {
1076 SilcSocketConnection sock =
1077 silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
1078 ptr->host, ptr->port);
1080 server->backup_noswitch = TRUE;
1081 if (sock->user_data)
1082 silc_server_free_sock_user_data(server, sock, NULL);
1083 silc_server_disconnect_remote(server, sock, 0, NULL);
1084 server->backup_noswitch = FALSE;
1085 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1096 if (silc_server_num_sockets_by_remote(server,
1097 silc_net_is_ip(ptr->host) ?
1099 silc_net_is_ip(ptr->host) ?
1100 NULL : ptr->host, ptr->port,
1101 SILC_SOCKET_TYPE_UNKNOWN)) {
1102 SILC_LOG_DEBUG(("We are already connecting to this router"));
1106 /* Allocate connection object for hold connection specific stuff. */
1107 sconn = silc_calloc(1, sizeof(*sconn));
1108 sconn->remote_host = strdup(ptr->host);
1109 sconn->remote_port = ptr->port;
1110 sconn->backup = ptr->backup_router;
1111 if (sconn->backup) {
1112 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1113 sconn->backup_replace_port = ptr->backup_replace_port;
1116 if (!server->router_conn && !sconn->backup)
1117 server->router_conn = sconn;
1119 silc_schedule_task_add(server->schedule, 0,
1120 silc_server_connect_router,
1121 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1122 SILC_TASK_PRI_NORMAL);
1127 /* Second part of connecting to router(s). Key exchange protocol has been
1128 executed and now we will execute authentication protocol. */
1130 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1132 SilcProtocol protocol = (SilcProtocol)context;
1133 SilcServerKEInternalContext *ctx =
1134 (SilcServerKEInternalContext *)protocol->context;
1135 SilcServer server = (SilcServer)ctx->server;
1136 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1137 SilcSocketConnection sock = ctx->sock;
1138 SilcServerConnAuthInternalContext *proto_ctx;
1139 SilcServerConfigRouter *conn = NULL;
1141 SILC_LOG_DEBUG(("Start"));
1143 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1144 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1145 /* Error occured during protocol */
1146 silc_protocol_free(protocol);
1147 sock->protocol = NULL;
1148 silc_ske_free_key_material(ctx->keymat);
1150 silc_packet_context_free(ctx->packet);
1152 silc_ske_free(ctx->ske);
1153 silc_free(ctx->dest_id);
1155 silc_server_disconnect_remote(server, sock,
1156 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1158 /* Try reconnecting if configuration wants it */
1159 if (!sconn->no_reconnect) {
1160 silc_schedule_task_add(server->schedule, 0,
1161 silc_server_connect_to_router_retry,
1162 sconn, 0, 1, SILC_TASK_TIMEOUT,
1163 SILC_TASK_PRI_NORMAL);
1167 /* Call completion to indicate error */
1168 if (sconn->callback)
1169 (*sconn->callback)(server, NULL, sconn->callback_context);
1171 silc_server_config_unref(&sconn->conn);
1172 silc_free(sconn->remote_host);
1173 silc_free(sconn->backup_replace_ip);
1178 /* We now have the key material as the result of the key exchange
1179 protocol. Take the key material into use. Free the raw key material
1180 as soon as we've set them into use. */
1181 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1182 ctx->sock, ctx->keymat,
1183 ctx->ske->prop->cipher,
1184 ctx->ske->prop->pkcs,
1185 ctx->ske->prop->hash,
1186 ctx->ske->prop->hmac,
1187 ctx->ske->prop->group,
1189 silc_protocol_free(protocol);
1190 sock->protocol = NULL;
1191 silc_ske_free_key_material(ctx->keymat);
1193 silc_packet_context_free(ctx->packet);
1195 silc_ske_free(ctx->ske);
1196 silc_free(ctx->dest_id);
1198 silc_server_disconnect_remote(server, sock,
1199 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1201 /* Try reconnecting if configuration wants it */
1202 if (!sconn->no_reconnect) {
1203 silc_schedule_task_add(server->schedule, 0,
1204 silc_server_connect_to_router_retry,
1205 sconn, 0, 1, SILC_TASK_TIMEOUT,
1206 SILC_TASK_PRI_NORMAL);
1210 /* Call completion to indicate error */
1211 if (sconn->callback)
1212 (*sconn->callback)(server, NULL, sconn->callback_context);
1214 silc_server_config_unref(&sconn->conn);
1215 silc_free(sconn->remote_host);
1216 silc_free(sconn->backup_replace_ip);
1220 silc_ske_free_key_material(ctx->keymat);
1222 /* Allocate internal context for the authentication protocol. This
1223 is sent as context for the protocol. */
1224 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1225 proto_ctx->server = (void *)server;
1226 proto_ctx->context = (void *)sconn;
1227 proto_ctx->sock = sock;
1228 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1229 proto_ctx->dest_id_type = ctx->dest_id_type;
1230 proto_ctx->dest_id = ctx->dest_id;
1232 /* Resolve the authentication method used in this connection. Check if
1233 we find a match from user configured connections */
1234 if (!sconn->conn.ref_ptr)
1235 conn = silc_server_config_find_router_conn(server, sock->hostname,
1238 conn = sconn->conn.ref_ptr;
1241 /* Match found. Use the configured authentication method. Take only
1242 the passphrase, since for public key auth we automatically use
1243 our local key pair. */
1244 if (conn->passphrase) {
1245 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1246 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1248 proto_ctx->auth_data = strdup(conn->passphrase);
1249 proto_ctx->auth_data_len = strlen(conn->passphrase);
1250 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1252 } else if (conn->publickeys) {
1253 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1255 proto_ctx->auth_meth = SILC_AUTH_NONE;
1258 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1259 sock->hostname, sock->ip, sock->port));
1260 silc_protocol_free(protocol);
1261 sock->protocol = NULL;
1263 silc_packet_context_free(ctx->packet);
1265 silc_ske_free(ctx->ske);
1266 silc_free(ctx->dest_id);
1268 silc_server_config_unref(&sconn->conn);
1269 silc_free(sconn->remote_host);
1270 silc_free(sconn->backup_replace_ip);
1272 silc_server_disconnect_remote(server, sock,
1273 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1277 /* Free old protocol as it is finished now */
1278 silc_protocol_free(protocol);
1280 silc_packet_context_free(ctx->packet);
1282 sock->protocol = NULL;
1284 /* Allocate the authentication protocol. This is allocated here
1285 but we won't start it yet. We will be receiving party of this
1286 protocol thus we will wait that connecting party will make
1287 their first move. */
1288 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1289 &sock->protocol, proto_ctx,
1290 silc_server_connect_to_router_final);
1292 /* Register timeout task. If the protocol is not executed inside
1293 this timelimit the connection will be terminated. */
1294 proto_ctx->timeout_task =
1295 silc_schedule_task_add(server->schedule, sock->sock,
1296 silc_server_timeout_remote,
1298 server->config->conn_auth_timeout, 0,
1302 /* Run the protocol */
1303 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1306 /* Finalizes the connection to router. Registers a server task to the
1307 queue so that we can accept new connections. */
1309 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1311 SilcProtocol protocol = (SilcProtocol)context;
1312 SilcServerConnAuthInternalContext *ctx =
1313 (SilcServerConnAuthInternalContext *)protocol->context;
1314 SilcServer server = (SilcServer)ctx->server;
1315 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1316 SilcSocketConnection sock = ctx->sock;
1317 SilcServerEntry id_entry = NULL;
1319 unsigned char *id_string;
1321 SilcIDListData idata;
1322 SilcServerConfigRouter *conn = NULL;
1323 SilcServerConfigConnParams *param = NULL;
1325 SILC_LOG_DEBUG(("Start"));
1327 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1328 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1329 /* Error occured during protocol */
1330 silc_free(ctx->dest_id);
1331 sock->protocol = NULL;
1332 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1334 sock->protocol = protocol;
1336 /* Try reconnecting if configuration wants it */
1337 if (!sconn->no_reconnect) {
1338 silc_schedule_task_add(server->schedule, 0,
1339 silc_server_connect_to_router_retry,
1340 sconn, 0, 1, SILC_TASK_TIMEOUT,
1341 SILC_TASK_PRI_NORMAL);
1348 /* Add a task to the queue. This task receives new connections to the
1349 server. This task remains on the queue until the end of the program. */
1350 if (!server->listenning && !sconn->backup) {
1351 silc_schedule_task_add(server->schedule, server->sock,
1352 silc_server_accept_new_connection,
1353 (void *)server, 0, 0,
1355 SILC_TASK_PRI_NORMAL);
1356 server->listenning = TRUE;
1359 /* Send NEW_SERVER packet to the router. We will become registered
1360 to the SILC network after sending this packet. */
1361 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1362 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1363 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1364 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1365 silc_buffer_format(packet,
1366 SILC_STR_UI_SHORT(id_len),
1367 SILC_STR_UI_XNSTRING(id_string, id_len),
1368 SILC_STR_UI_SHORT(strlen(server->server_name)),
1369 SILC_STR_UI_XNSTRING(server->server_name,
1370 strlen(server->server_name)),
1373 /* Send the packet */
1374 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1375 packet->data, packet->len, TRUE);
1376 silc_buffer_free(packet);
1377 silc_free(id_string);
1379 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1381 /* Check that we do not have this ID already */
1382 id_entry = silc_idlist_find_server_by_id(server->local_list,
1383 ctx->dest_id, TRUE, NULL);
1385 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1387 id_entry = silc_idlist_find_server_by_id(server->global_list,
1388 ctx->dest_id, TRUE, NULL);
1390 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1393 SILC_LOG_DEBUG(("New server id(%s)",
1394 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1396 /* Add the connected router to global server list. Router is sent
1397 as NULL since it's local to us. */
1398 id_entry = silc_idlist_add_server(server->global_list,
1399 strdup(sock->hostname),
1400 SILC_ROUTER, ctx->dest_id, NULL, sock);
1402 silc_free(ctx->dest_id);
1403 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1404 sock->protocol = NULL;
1405 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1407 sock->protocol = protocol;
1411 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1412 silc_free(sock->user_data);
1413 sock->user_data = (void *)id_entry;
1414 sock->type = SILC_SOCKET_TYPE_ROUTER;
1415 idata = (SilcIDListData)sock->user_data;
1416 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1417 SILC_IDLIST_STATUS_LOCAL);
1419 conn = sconn->conn.ref_ptr;
1420 param = &server->config->param;
1421 if (conn && conn->param)
1422 param = conn->param;
1424 /* Perform keepalive. */
1425 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1426 silc_server_perform_heartbeat,
1429 /* Register re-key timeout */
1430 idata->rekey->timeout = param->key_exchange_rekey;
1431 silc_schedule_task_add(server->schedule, sock->sock,
1432 silc_server_rekey_callback,
1433 (void *)sock, idata->rekey->timeout, 0,
1434 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1436 if (!sconn->backup) {
1437 /* Mark this router our primary router if we're still standalone */
1438 if (server->standalone) {
1439 SILC_LOG_DEBUG(("This connection is our primary router"));
1440 server->id_entry->router = id_entry;
1441 server->router = id_entry;
1442 server->router->server_type = SILC_ROUTER;
1443 server->standalone = FALSE;
1445 /* If we are router then announce our possible servers. Backup
1446 router announces also global servers. */
1447 if (server->server_type == SILC_ROUTER)
1448 silc_server_announce_servers(server,
1449 server->backup_router ? TRUE : FALSE,
1450 0, SILC_PRIMARY_ROUTE(server));
1452 /* Announce our clients and channels to the router */
1453 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1454 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1456 /* If we are backup router then this primary router is whom we are
1458 if (server->server_type == SILC_BACKUP_ROUTER)
1459 silc_server_backup_add(server, server->id_entry, sock->ip,
1460 sconn->remote_port, TRUE);
1463 /* Add this server to be our backup router */
1464 id_entry->server_type = SILC_BACKUP_ROUTER;
1465 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1466 sconn->backup_replace_port, FALSE);
1469 sock->protocol = NULL;
1472 /* Call the completion callback to indicate that we've connected to
1474 if (sconn && sconn->callback)
1475 (*sconn->callback)(server, id_entry, sconn->callback_context);
1477 /* Free the temporary connection data context */
1479 silc_server_config_unref(&sconn->conn);
1480 silc_free(sconn->remote_host);
1481 silc_free(sconn->backup_replace_ip);
1484 if (sconn == server->router_conn)
1485 server->router_conn = NULL;
1488 /* Free the protocol object */
1489 if (sock->protocol == protocol)
1490 sock->protocol = NULL;
1491 silc_protocol_free(protocol);
1493 silc_packet_context_free(ctx->packet);
1495 silc_ske_free(ctx->ske);
1496 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1497 silc_free(ctx->auth_data);
1501 /* Host lookup callback that is called after the incoming connection's
1502 IP and FQDN lookup is performed. This will actually check the acceptance
1503 of the incoming connection and will register the key exchange protocol
1504 for this connection. */
1507 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1510 SilcServerKEInternalContext *proto_ctx =
1511 (SilcServerKEInternalContext *)context;
1512 SilcServer server = (SilcServer)proto_ctx->server;
1513 SilcServerConfigClient *cconfig = NULL;
1514 SilcServerConfigServer *sconfig = NULL;
1515 SilcServerConfigRouter *rconfig = NULL;
1516 SilcServerConfigDeny *deny;
1519 /* Check whether we could resolve both IP and FQDN. */
1520 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1521 server->config->require_reverse_lookup)) {
1522 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1523 sock->hostname ? sock->hostname :
1524 sock->ip ? sock->ip : ""));
1525 server->stat.conn_failures++;
1526 silc_server_disconnect_remote(server, sock,
1527 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1528 "Unknown host or IP");
1529 silc_free(proto_ctx);
1533 /* Register the connection for network input and output. This sets
1534 that scheduler will listen for incoming packets for this connection
1535 and sets that outgoing packets may be sent to this connection as well.
1536 However, this doesn't set the scheduler for outgoing traffic, it
1537 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1538 later when outgoing data is available. */
1539 context = (void *)server;
1540 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1542 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1545 /* Listenning port */
1546 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1547 silc_server_disconnect_remote(server, sock,
1548 SILC_STATUS_ERR_RESOURCE_LIMIT,
1549 "Connection refused");
1550 server->stat.conn_failures++;
1551 silc_free(proto_ctx);
1554 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1556 /* Check whether this connection is denied to connect to us. */
1557 deny = silc_server_config_find_denied(server, sock->ip);
1559 deny = silc_server_config_find_denied(server, sock->hostname);
1561 /* The connection is denied */
1562 SILC_LOG_INFO(("Connection %s (%s) is denied",
1563 sock->hostname, sock->ip));
1564 silc_server_disconnect_remote(server, sock,
1565 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1567 server->stat.conn_failures++;
1568 silc_free(proto_ctx);
1572 /* Check whether we have configured this sort of connection at all. We
1573 have to check all configurations since we don't know what type of
1574 connection this is. */
1575 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1576 cconfig = silc_server_config_find_client(server, sock->hostname);
1577 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1578 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1579 if (server->server_type == SILC_ROUTER) {
1580 if (!(rconfig = silc_server_config_find_router_conn(server,
1581 sock->ip, sock->port)))
1582 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1585 if (!cconfig && !sconfig && !rconfig) {
1586 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1588 silc_server_disconnect_remote(server, sock,
1589 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1590 server->stat.conn_failures++;
1591 silc_free(proto_ctx);
1595 /* The connection is allowed */
1597 /* Set internal context for key exchange protocol. This is
1598 sent as context for the protocol. */
1599 proto_ctx->sock = sock;
1600 proto_ctx->rng = server->rng;
1601 proto_ctx->responder = TRUE;
1602 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1603 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1604 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1606 /* Take flags for key exchange. Since we do not know what type of connection
1607 this is, we go through all found configurations and use the global ones
1608 as well. This will result always into strictest key exchange flags. */
1609 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1610 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1611 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1612 if (server->config->param.key_exchange_pfs)
1613 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1615 /* Prepare the connection for key exchange protocol. We allocate the
1616 protocol but will not start it yet. The connector will be the
1617 initiator of the protocol thus we will wait for initiation from
1618 there before we start the protocol. */
1619 server->stat.auth_attempts++;
1620 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1621 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1622 &sock->protocol, proto_ctx,
1623 silc_server_accept_new_connection_second);
1625 /* Register a timeout task that will be executed if the connector
1626 will not start the key exchange protocol within specified timeout
1627 and the connection will be closed. */
1628 proto_ctx->timeout_task =
1629 silc_schedule_task_add(server->schedule, sock->sock,
1630 silc_server_timeout_remote,
1632 server->config->key_exchange_timeout, 0,
1637 /* Accepts new connections to the server. Accepting new connections are
1638 done in three parts to make it async. */
1640 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1642 SilcServer server = (SilcServer)context;
1643 SilcSocketConnection newsocket;
1644 SilcServerKEInternalContext *proto_ctx;
1647 SILC_LOG_DEBUG(("Accepting new connection"));
1649 server->stat.conn_attempts++;
1651 sock = silc_net_accept_connection(fd);
1653 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1654 server->stat.conn_failures++;
1658 /* Check for maximum allowed connections */
1659 if (sock > server->config->param.connections_max) {
1660 SILC_LOG_ERROR(("Refusing connection, server is full"));
1661 server->stat.conn_failures++;
1662 silc_net_close_connection(sock);
1666 /* Set socket options */
1667 silc_net_set_socket_nonblock(sock);
1668 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1670 /* We don't create a ID yet, since we don't know what type of connection
1671 this is yet. But, we do add the connection to the socket table. */
1672 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1673 server->sockets[sock] = newsocket;
1675 /* Perform asynchronous host lookup. This will lookup the IP and the
1676 FQDN of the remote connection. After the lookup is done the connection
1677 is accepted further. */
1678 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1679 proto_ctx->server = server;
1680 proto_ctx->context = (void *)fd;
1681 silc_socket_host_lookup(newsocket, TRUE,
1682 silc_server_accept_new_connection_lookup,
1683 (void *)proto_ctx, server->schedule);
1686 /* Second part of accepting new connection. Key exchange protocol has been
1687 performed and now it is time to do little connection authentication
1688 protocol to figure out whether this connection is client or server
1689 and whether it has right to access this server (especially server
1690 connections needs to be authenticated). */
1692 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1694 SilcProtocol protocol = (SilcProtocol)context;
1695 SilcServerKEInternalContext *ctx =
1696 (SilcServerKEInternalContext *)protocol->context;
1697 SilcServer server = (SilcServer)ctx->server;
1698 SilcSocketConnection sock = ctx->sock;
1699 SilcServerConnAuthInternalContext *proto_ctx;
1701 SILC_LOG_DEBUG(("Start"));
1703 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1704 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1705 /* Error occured during protocol */
1706 SILC_LOG_DEBUG(("Error in key exchange protocol"));
1707 silc_protocol_free(protocol);
1708 sock->protocol = NULL;
1709 silc_ske_free_key_material(ctx->keymat);
1711 silc_packet_context_free(ctx->packet);
1713 silc_ske_free(ctx->ske);
1714 silc_free(ctx->dest_id);
1715 silc_server_config_unref(&ctx->cconfig);
1716 silc_server_config_unref(&ctx->sconfig);
1717 silc_server_config_unref(&ctx->rconfig);
1720 if (!SILC_IS_DISCONNECTING(sock)) {
1721 SILC_LOG_INFO(("Key exchange failed for %s:%d [%s]", sock->hostname,
1723 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1724 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1725 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1727 silc_server_disconnect_remote(server, sock,
1728 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1732 server->stat.auth_failures++;
1736 /* We now have the key material as the result of the key exchange
1737 protocol. Take the key material into use. Free the raw key material
1738 as soon as we've set them into use. */
1739 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1740 ctx->sock, ctx->keymat,
1741 ctx->ske->prop->cipher,
1742 ctx->ske->prop->pkcs,
1743 ctx->ske->prop->hash,
1744 ctx->ske->prop->hmac,
1745 ctx->ske->prop->group,
1747 SILC_LOG_ERROR(("Error setting key material in use"));
1748 silc_protocol_free(protocol);
1749 sock->protocol = NULL;
1750 silc_ske_free_key_material(ctx->keymat);
1752 silc_packet_context_free(ctx->packet);
1754 silc_ske_free(ctx->ske);
1755 silc_free(ctx->dest_id);
1756 silc_server_config_unref(&ctx->cconfig);
1757 silc_server_config_unref(&ctx->sconfig);
1758 silc_server_config_unref(&ctx->rconfig);
1760 silc_server_disconnect_remote(server, sock,
1761 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1762 server->stat.auth_failures++;
1765 silc_ske_free_key_material(ctx->keymat);
1767 /* Allocate internal context for the authentication protocol. This
1768 is sent as context for the protocol. */
1769 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1770 proto_ctx->server = (void *)server;
1771 proto_ctx->sock = sock;
1772 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1773 proto_ctx->responder = TRUE;
1774 proto_ctx->dest_id_type = ctx->dest_id_type;
1775 proto_ctx->dest_id = ctx->dest_id;
1776 proto_ctx->cconfig = ctx->cconfig;
1777 proto_ctx->sconfig = ctx->sconfig;
1778 proto_ctx->rconfig = ctx->rconfig;
1780 /* Free old protocol as it is finished now */
1781 silc_protocol_free(protocol);
1783 silc_packet_context_free(ctx->packet);
1785 sock->protocol = NULL;
1787 /* Allocate the authentication protocol. This is allocated here
1788 but we won't start it yet. We will be receiving party of this
1789 protocol thus we will wait that connecting party will make
1790 their first move. */
1791 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1792 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1793 &sock->protocol, proto_ctx,
1794 silc_server_accept_new_connection_final);
1796 /* Register timeout task. If the protocol is not executed inside
1797 this timelimit the connection will be terminated. */
1798 proto_ctx->timeout_task =
1799 silc_schedule_task_add(server->schedule, sock->sock,
1800 silc_server_timeout_remote,
1802 server->config->conn_auth_timeout, 0,
1807 /* After this is called, server don't wait for backup router anymore.
1808 This gets called automatically even after we have backup router
1809 connection established. */
1811 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1813 SilcServer server = context;
1814 server->wait_backup = FALSE;
1817 /* Final part of accepting new connection. The connection has now
1818 been authenticated and keys has been exchanged. We also know whether
1819 this is client or server connection. */
1821 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1823 SilcProtocol protocol = (SilcProtocol)context;
1824 SilcServerConnAuthInternalContext *ctx =
1825 (SilcServerConnAuthInternalContext *)protocol->context;
1826 SilcServer server = (SilcServer)ctx->server;
1827 SilcSocketConnection sock = ctx->sock;
1828 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1830 SilcServerConfigConnParams *param = &server->config->param;
1832 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1833 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1834 /* Error occured during protocol */
1835 SILC_LOG_DEBUG(("Error during authentication protocol"));
1836 silc_protocol_free(protocol);
1837 sock->protocol = NULL;
1839 silc_packet_context_free(ctx->packet);
1841 silc_ske_free(ctx->ske);
1842 silc_free(ctx->dest_id);
1843 silc_server_config_unref(&ctx->cconfig);
1844 silc_server_config_unref(&ctx->sconfig);
1845 silc_server_config_unref(&ctx->rconfig);
1848 if (!SILC_IS_DISCONNECTING(sock)) {
1849 SILC_LOG_INFO(("Authentication failed for %s:%d [%s]", sock->hostname,
1851 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1852 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1853 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1855 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1858 server->stat.auth_failures++;
1862 entry->data.last_receive = time(NULL);
1864 switch (ctx->conn_type) {
1865 case SILC_SOCKET_TYPE_CLIENT:
1867 SilcClientEntry client;
1868 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1870 /* Verify whether this connection is after all allowed to connect */
1871 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1872 &server->config->param,
1873 conn->param, ctx->ske)) {
1874 server->stat.auth_failures++;
1878 /* If we are primary router and we have backup router configured
1879 but it has not connected to use yet, do not accept any other
1881 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1882 !server->backup_router) {
1883 SilcServerConfigRouter *router;
1884 router = silc_server_config_get_backup_router(server);
1885 if (router && strcmp(server->config->server_info->primary->server_ip,
1887 silc_server_find_socket_by_host(server,
1888 SILC_SOCKET_TYPE_SERVER,
1889 router->backup_replace_ip, 0)) {
1890 SILC_LOG_INFO(("Will not accept connections because we do "
1891 "not have backup router connection established"));
1892 sock->protocol = NULL;
1893 silc_server_disconnect_remote(server, sock,
1894 SILC_STATUS_ERR_PERM_DENIED,
1895 "We do not have connection to backup "
1896 "router established, try later");
1897 silc_free(sock->user_data);
1898 server->stat.auth_failures++;
1900 /* From here on, wait 10 seconds for the backup router to appear. */
1901 silc_schedule_task_add(server->schedule, 0,
1902 silc_server_backup_router_wait,
1903 (void *)server, 10, 0,
1904 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1909 SILC_LOG_DEBUG(("Remote host is client"));
1910 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1913 /* Add the client to the client ID cache. The nickname and Client ID
1914 and other information is created after we have received NEW_CLIENT
1915 packet from client. */
1916 client = silc_idlist_add_client(server->local_list,
1917 NULL, NULL, NULL, NULL, NULL, sock, 0);
1919 SILC_LOG_ERROR(("Could not add new client to cache"));
1920 silc_free(sock->user_data);
1921 sock->protocol = NULL;
1922 silc_server_disconnect_remote(server, sock,
1923 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1924 server->stat.auth_failures++;
1927 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1930 server->stat.my_clients++;
1931 server->stat.clients++;
1932 server->stat.cell_clients++;
1934 /* Get connection parameters */
1936 param = conn->param;
1938 if (!param->keepalive_secs)
1939 param->keepalive_secs = server->config->param.keepalive_secs;
1941 if (!param->qos && server->config->param.qos) {
1942 param->qos = server->config->param.qos;
1943 param->qos_rate_limit = server->config->param.qos_rate_limit;
1944 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1945 param->qos_limit_sec = server->config->param.qos_limit_sec;
1946 param->qos_limit_usec = server->config->param.qos_limit_usec;
1949 /* Check if to be anonymous connection */
1950 if (param->anonymous)
1951 client->mode |= SILC_UMODE_ANONYMOUS;
1954 id_entry = (void *)client;
1957 case SILC_SOCKET_TYPE_SERVER:
1958 case SILC_SOCKET_TYPE_ROUTER:
1960 SilcServerEntry new_server;
1961 bool initiator = FALSE;
1962 bool backup_local = FALSE;
1963 bool backup_router = FALSE;
1964 char *backup_replace_ip = NULL;
1965 SilcUInt16 backup_replace_port = 0;
1966 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1967 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1969 /* If we are backup router and this is incoming server connection
1970 and we do not have connection to primary router, do not allow
1972 if (server->server_type == SILC_BACKUP_ROUTER &&
1973 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1974 !SILC_PRIMARY_ROUTE(server)) {
1975 SILC_LOG_INFO(("Will not accept server connection because we do "
1976 "not have primary router connection established"));
1977 sock->protocol = NULL;
1978 silc_server_disconnect_remote(server, sock,
1979 SILC_STATUS_ERR_PERM_DENIED,
1980 "We do not have connection to primary "
1981 "router established, try later");
1982 silc_free(sock->user_data);
1983 server->stat.auth_failures++;
1987 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1988 /* Verify whether this connection is after all allowed to connect */
1989 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1990 &server->config->param,
1991 rconn ? rconn->param : NULL,
1993 silc_free(sock->user_data);
1994 server->stat.auth_failures++;
2000 param = rconn->param;
2002 if (!param->keepalive_secs)
2003 param->keepalive_secs = server->config->param.keepalive_secs;
2005 if (!param->qos && server->config->param.qos) {
2006 param->qos = server->config->param.qos;
2007 param->qos_rate_limit = server->config->param.qos_rate_limit;
2008 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2009 param->qos_limit_sec = server->config->param.qos_limit_sec;
2010 param->qos_limit_usec = server->config->param.qos_limit_usec;
2014 initiator = rconn->initiator;
2015 backup_local = rconn->backup_local;
2016 backup_router = rconn->backup_router;
2017 backup_replace_ip = rconn->backup_replace_ip;
2018 backup_replace_port = rconn->backup_replace_port;
2022 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2023 /* Verify whether this connection is after all allowed to connect */
2024 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
2025 &server->config->param,
2026 sconn ? sconn->param : NULL,
2028 silc_free(sock->user_data);
2029 server->stat.auth_failures++;
2034 param = sconn->param;
2036 if (!param->keepalive_secs)
2037 param->keepalive_secs = server->config->param.keepalive_secs;
2039 if (!param->qos && server->config->param.qos) {
2040 param->qos = server->config->param.qos;
2041 param->qos_rate_limit = server->config->param.qos_rate_limit;
2042 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2043 param->qos_limit_sec = server->config->param.qos_limit_sec;
2044 param->qos_limit_usec = server->config->param.qos_limit_usec;
2048 backup_router = sconn->backup_router;
2052 /* If we are primary router and we have backup router configured
2053 but it has not connected to use yet, do not accept any other
2055 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2056 !server->backup_router && !backup_router) {
2057 SilcServerConfigRouter *router;
2058 router = silc_server_config_get_backup_router(server);
2059 if (router && strcmp(server->config->server_info->primary->server_ip,
2061 silc_server_find_socket_by_host(server,
2062 SILC_SOCKET_TYPE_SERVER,
2063 router->backup_replace_ip, 0)) {
2064 SILC_LOG_INFO(("Will not accept connections because we do "
2065 "not have backup router connection established"));
2066 sock->protocol = NULL;
2067 silc_server_disconnect_remote(server, sock,
2068 SILC_STATUS_ERR_PERM_DENIED,
2069 "We do not have connection to backup "
2070 "router established, try later");
2071 silc_free(sock->user_data);
2072 server->stat.auth_failures++;
2074 /* From here on, wait 10 seconds for the backup router to appear. */
2075 silc_schedule_task_add(server->schedule, 0,
2076 silc_server_backup_router_wait,
2077 (void *)server, 10, 0,
2078 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2083 SILC_LOG_DEBUG(("Remote host is %s",
2084 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2085 "server" : (backup_router ?
2086 "backup router" : "router")));
2087 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2088 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2089 "server" : (backup_router ?
2090 "backup router" : "router")));
2092 /* Add the server into server cache. The server name and Server ID
2093 is updated after we have received NEW_SERVER packet from the
2094 server. We mark ourselves as router for this server if we really
2097 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2098 server->local_list : (backup_router ?
2099 server->local_list :
2100 server->global_list)),
2102 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2103 SILC_SERVER : SILC_ROUTER),
2105 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2106 server->id_entry : (backup_router ?
2107 server->id_entry : NULL)),
2110 SILC_LOG_ERROR(("Could not add new server to cache"));
2111 silc_free(sock->user_data);
2112 sock->protocol = NULL;
2113 silc_server_disconnect_remote(server, sock,
2114 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2115 server->stat.auth_failures++;
2118 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2120 id_entry = (void *)new_server;
2122 /* If the incoming connection is router and marked as backup router
2123 then add it to be one of our backups */
2124 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2125 /* Change it back to SERVER type since that's what it really is. */
2127 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2128 new_server->server_type = SILC_BACKUP_ROUTER;
2130 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2131 ("Backup router %s is now online",
2134 /* Remove the backup waiting with timeout */
2135 silc_schedule_task_add(server->schedule, 0,
2136 silc_server_backup_router_wait,
2137 (void *)server, 5, 0,
2138 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2142 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2143 server->stat.my_servers++;
2145 server->stat.my_routers++;
2146 server->stat.routers++;
2148 server->stat.servers++;
2150 /* Check whether this connection is to be our primary router connection
2151 if we do not already have the primary route. */
2152 if (!backup_router &&
2153 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2154 if (silc_server_config_is_primary_route(server) && !initiator)
2157 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2158 server->standalone = FALSE;
2159 if (!server->id_entry->router) {
2160 server->id_entry->router = id_entry;
2161 server->router = id_entry;
2172 sock->type = ctx->conn_type;
2174 /* Add the common data structure to the ID entry. */
2175 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2177 /* Add to sockets internal pointer for fast referencing */
2178 silc_free(sock->user_data);
2179 sock->user_data = id_entry;
2181 /* Connection has been fully established now. Everything is ok. */
2182 SILC_LOG_DEBUG(("New connection authenticated"));
2184 /* Perform keepalive. */
2185 if (param->keepalive_secs)
2186 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2187 silc_server_perform_heartbeat,
2190 /* Perform Quality of Service */
2192 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2193 param->qos_limit_sec, param->qos_limit_usec,
2197 if (sock->protocol == protocol)
2198 silc_protocol_free(protocol);
2200 silc_packet_context_free(ctx->packet);
2202 silc_ske_free(ctx->ske);
2203 silc_free(ctx->dest_id);
2204 silc_server_config_unref(&ctx->cconfig);
2205 silc_server_config_unref(&ctx->sconfig);
2206 silc_server_config_unref(&ctx->rconfig);
2208 sock->protocol = NULL;
2211 /* This function is used to read packets from network and send packets to
2212 network. This is usually a generic task. */
2214 SILC_TASK_CALLBACK(silc_server_packet_process)
2216 SilcServer server = (SilcServer)context;
2217 SilcSocketConnection sock = server->sockets[fd];
2218 SilcIDListData idata;
2219 SilcCipher cipher = NULL;
2220 SilcHmac hmac = NULL;
2221 SilcUInt32 sequence = 0;
2222 bool local_is_router;
2226 SILC_LOG_DEBUG(("Unknown socket connection"));
2230 /* Packet sending */
2232 if (type == SILC_TASK_WRITE) {
2233 /* Do not send data to disconnected connection */
2234 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2235 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2239 server->stat.packets_sent++;
2241 /* Send the packet */
2242 ret = silc_packet_send(sock, TRUE);
2244 /* If returned -2 could not write to connection now, will do
2249 /* The packet has been sent and now it is time to set the connection
2250 back to only for input. When there is again some outgoing data
2251 available for this connection it will be set for output as well.
2252 This call clears the output setting and sets it only for input. */
2253 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2254 SILC_UNSET_OUTBUF_PENDING(sock);
2255 silc_buffer_clear(sock->outbuf);
2258 SILC_LOG_ERROR(("Error sending packet to connection "
2259 "%s:%d [%s]", sock->hostname, sock->port,
2260 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2261 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2262 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2265 if (sock->user_data)
2266 silc_server_free_sock_user_data(server, sock, NULL);
2267 SILC_SET_DISCONNECTING(sock);
2268 silc_server_close_connection(server, sock);
2273 /* Packet receiving */
2275 /* Read some data from connection */
2276 ret = silc_packet_receive(sock);
2280 SILC_LOG_ERROR(("Error receiving packet from connection "
2281 "%s:%d [%s] %s", sock->hostname, sock->port,
2282 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2283 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2284 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2285 "Router"), strerror(errno)));
2287 if (sock->user_data)
2288 silc_server_free_sock_user_data(server, sock, NULL);
2289 SILC_SET_DISCONNECTING(sock);
2290 silc_server_close_connection(server, sock);
2297 SILC_LOG_DEBUG(("Read EOF"));
2299 /* If connection is disconnecting already we will finally
2300 close the connection */
2301 if (SILC_IS_DISCONNECTING(sock)) {
2302 if (sock->user_data)
2303 silc_server_free_sock_user_data(server, sock, NULL);
2304 silc_server_close_connection(server, sock);
2308 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2310 if (sock->user_data) {
2313 /* If backup disconnected then mark that resuming willl not be allowed */
2314 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2315 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2316 SilcServerEntry server_entry = sock->user_data;
2317 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2318 server->backup_closed = TRUE;
2321 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2322 silc_server_free_sock_user_data(server, sock, tmp);
2324 silc_server_free_sock_user_data(server, sock, NULL);
2325 } else if (server->router_conn && server->router_conn->sock == sock &&
2326 !server->router && server->standalone) {
2327 silc_server_create_connections(server);
2330 SILC_SET_DISCONNECTING(sock);
2331 silc_server_close_connection(server, sock);
2335 /* If connection is disconnecting or disconnected we will ignore
2337 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2338 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2342 /* Get keys and stuff from ID entry */
2343 idata = (SilcIDListData)sock->user_data;
2345 cipher = idata->receive_key;
2346 hmac = idata->hmac_receive;
2347 sequence = idata->psn_receive;
2350 /* Then, process the packet. This will call the parser that will then
2351 decrypt and parse the packet. */
2353 local_is_router = (server->server_type == SILC_ROUTER);
2355 /* If socket connection is our primary, we are backup and we are doing
2356 backup resuming, we won't process the packet as being a router
2357 (affects channel message decryption). */
2358 if (server->backup_router && SILC_SERVER_IS_BACKUP(sock) &&
2359 SILC_PRIMARY_ROUTE(server) == sock)
2360 local_is_router = FALSE;
2362 ret = silc_packet_receive_process(sock, local_is_router,
2363 cipher, hmac, sequence,
2364 silc_server_packet_parse, server);
2366 /* If processing failed the connection is closed. */
2368 /* On packet processing errors we may close our primary router
2369 connection but won't become primary router if we are the backup
2370 since this is local error condition. */
2371 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2372 server->backup_noswitch = TRUE;
2374 if (sock->user_data)
2375 silc_server_free_sock_user_data(server, sock, NULL);
2376 SILC_SET_DISCONNECTING(sock);
2377 silc_server_close_connection(server, sock);
2381 /* Parses whole packet, received earlier. */
2383 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2385 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2386 SilcServer server = (SilcServer)parse_ctx->context;
2387 SilcSocketConnection sock = parse_ctx->sock;
2388 SilcPacketContext *packet = parse_ctx->packet;
2389 SilcIDListData idata = (SilcIDListData)sock->user_data;
2392 server->stat.packets_received++;
2394 /* Parse the packet */
2395 if (parse_ctx->normal)
2396 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2398 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2400 /* If entry is disabled ignore what we got. */
2401 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2402 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2403 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2404 SILC_LOG_DEBUG(("Connection is disabled"));
2408 if (ret == SILC_PACKET_NONE) {
2409 SILC_LOG_DEBUG(("Error parsing packet"));
2413 /* Check that the the current client ID is same as in the client's packet. */
2414 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2415 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2416 if (client && client->id && packet->src_id) {
2417 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2418 packet->src_id_type);
2419 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2421 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2428 if (server->server_type == SILC_ROUTER) {
2429 /* Route the packet if it is not destined to us. Other ID types but
2430 server are handled separately after processing them. */
2431 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2432 packet->dst_id_type == SILC_ID_SERVER &&
2433 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2434 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2436 /* Route the packet to fastest route for the destination ID */
2437 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2438 packet->dst_id_type);
2441 silc_server_packet_route(server,
2442 silc_server_route_get(server, id,
2443 packet->dst_id_type),
2450 /* Parse the incoming packet type */
2451 silc_server_packet_parse_type(server, sock, packet);
2453 /* Broadcast packet if it is marked as broadcast packet and it is
2454 originated from router and we are router. */
2455 if (server->server_type == SILC_ROUTER &&
2456 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2457 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2458 /* Broadcast to our primary route */
2459 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2461 /* If we have backup routers then we need to feed all broadcast
2462 data to those servers. */
2463 silc_server_backup_broadcast(server, sock, packet);
2467 silc_packet_context_free(packet);
2468 silc_free(parse_ctx);
2471 /* Parser callback called by silc_packet_receive_process. This merely
2472 registers timeout that will handle the actual parsing when appropriate. */
2474 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2477 SilcServer server = (SilcServer)context;
2478 SilcSocketConnection sock = parser_context->sock;
2479 SilcIDListData idata = (SilcIDListData)sock->user_data;
2483 idata->psn_receive = parser_context->packet->sequence + 1;
2485 /* If protocol for this connection is key exchange or rekey then we'll
2486 process all packets synchronously, since there might be packets in
2487 queue that we are not able to decrypt without first processing the
2488 packets before them. */
2489 if (sock->protocol && sock->protocol->protocol &&
2490 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2491 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2492 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2495 /* Reprocess data since we'll return FALSE here. This is because
2496 the idata->receive_key might have become valid in the last packet
2497 and we want to call this processor with valid cipher. */
2499 ret = silc_packet_receive_process(
2500 sock, server->server_type == SILC_ROUTER,
2502 idata->hmac_receive, idata->psn_receive,
2503 silc_server_packet_parse, server);
2505 ret = silc_packet_receive_process(
2506 sock, server->server_type == SILC_ROUTER,
2508 silc_server_packet_parse, server);
2511 /* On packet processing errors we may close our primary router
2512 connection but won't become primary router if we are the backup
2513 since this is local error condition. */
2514 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2515 server->backup_noswitch = TRUE;
2517 if (sock->user_data)
2518 silc_server_free_sock_user_data(server, sock, NULL);
2519 SILC_SET_DISCONNECTING(sock);
2520 silc_server_close_connection(server, sock);
2526 switch (sock->type) {
2527 case SILC_SOCKET_TYPE_UNKNOWN:
2528 case SILC_SOCKET_TYPE_CLIENT:
2529 /* Parse the packet with timeout */
2530 silc_schedule_task_add(server->schedule, sock->sock,
2531 silc_server_packet_parse_real,
2532 (void *)parser_context, 0, 100000,
2534 SILC_TASK_PRI_NORMAL);
2536 case SILC_SOCKET_TYPE_SERVER:
2537 case SILC_SOCKET_TYPE_ROUTER:
2538 /* Packets from servers are parsed immediately */
2539 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2549 /* Parses the packet type and calls what ever routines the packet type
2550 requires. This is done for all incoming packets. */
2552 void silc_server_packet_parse_type(SilcServer server,
2553 SilcSocketConnection sock,
2554 SilcPacketContext *packet)
2556 SilcPacketType type = packet->type;
2557 SilcIDListData idata = (SilcIDListData)sock->user_data;
2559 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2560 silc_get_packet_name(type), packet->flags));
2562 /* Parse the packet type */
2564 case SILC_PACKET_DISCONNECT:
2567 char *message = NULL;
2569 if (packet->flags & SILC_PACKET_FLAG_LIST)
2571 if (packet->buffer->len < 1)
2574 status = (SilcStatus)packet->buffer->data[0];
2575 if (packet->buffer->len > 1 &&
2576 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2577 message = silc_memdup(packet->buffer->data + 1,
2578 packet->buffer->len - 1);
2580 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2581 sock->ip, sock->hostname,
2582 silc_get_status_message(status), status,
2583 message ? message : ""));
2586 /* Do not switch to backup in case of error */
2587 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
2589 /* If backup disconnected then mark that resuming willl not be allowed */
2590 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2591 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2592 SilcServerEntry server_entry = sock->user_data;
2593 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2594 server->backup_closed = TRUE;
2597 /* Handle the disconnection from our end too */
2598 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2599 silc_server_free_sock_user_data(server, sock, NULL);
2600 SILC_SET_DISCONNECTING(sock);
2601 silc_server_close_connection(server, sock);
2602 server->backup_noswitch = FALSE;
2606 case SILC_PACKET_SUCCESS:
2608 * Success received for something. For now we can have only
2609 * one protocol for connection executing at once hence this
2610 * success message is for whatever protocol is executing currently.
2612 if (packet->flags & SILC_PACKET_FLAG_LIST)
2615 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2618 case SILC_PACKET_FAILURE:
2620 * Failure received for something. For now we can have only
2621 * one protocol for connection executing at once hence this
2622 * failure message is for whatever protocol is executing currently.
2624 if (packet->flags & SILC_PACKET_FLAG_LIST)
2627 /* Check for failure START_USE from backup router */
2628 if (server->server_type == SILC_SERVER &&
2629 server->backup_primary && packet->buffer->len == 4) {
2631 SILC_GET32_MSB(type, packet->buffer->data);
2632 if (type == SILC_SERVER_BACKUP_START_USE) {
2633 /* Attempt to reconnect to primary */
2634 SILC_LOG_DEBUG(("Received failed START_USE from backup %s", sock->ip));
2636 /* If backup is our primary, disconnect now. */
2637 if (server->router == sock->user_data) {
2638 if (sock->user_data)
2639 silc_server_free_sock_user_data(server, sock, NULL);
2640 SILC_SET_DISCONNECTING(sock);
2641 silc_server_close_connection(server, sock);
2645 silc_server_create_connections(server);
2649 /* Execute protocol */
2650 if (sock->protocol) {
2651 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
2652 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2657 case SILC_PACKET_REJECT:
2658 if (packet->flags & SILC_PACKET_FLAG_LIST)
2663 case SILC_PACKET_NOTIFY:
2665 * Received notify packet. Server can receive notify packets from
2666 * router. Server then relays the notify messages to clients if needed.
2668 if (packet->flags & SILC_PACKET_FLAG_LIST)
2669 silc_server_notify_list(server, sock, packet);
2671 silc_server_notify(server, sock, packet);
2677 case SILC_PACKET_CHANNEL_MESSAGE:
2679 * Received channel message. Channel messages are special packets
2680 * (although probably most common ones) thus they are handled
2683 if (packet->flags & SILC_PACKET_FLAG_LIST)
2685 idata->last_receive = time(NULL);
2686 silc_server_channel_message(server, sock, packet);
2689 case SILC_PACKET_CHANNEL_KEY:
2691 * Received key for channel. As channels are created by the router
2692 * the keys are as well. We will distribute the key to all of our
2693 * locally connected clients on the particular channel. Router
2694 * never receives this channel and thus is ignored.
2696 if (packet->flags & SILC_PACKET_FLAG_LIST)
2698 silc_server_channel_key(server, sock, packet);
2704 case SILC_PACKET_COMMAND:
2706 * Recived command. Processes the command request and allocates the
2707 * command context and calls the command.
2709 if (packet->flags & SILC_PACKET_FLAG_LIST)
2711 silc_server_command_process(server, sock, packet);
2714 case SILC_PACKET_COMMAND_REPLY:
2716 * Received command reply packet. Received command reply to command. It
2717 * may be reply to command sent by us or reply to command sent by client
2718 * that we've routed further.
2720 if (packet->flags & SILC_PACKET_FLAG_LIST)
2722 silc_server_command_reply(server, sock, packet);
2726 * Private Message packets
2728 case SILC_PACKET_PRIVATE_MESSAGE:
2730 * Received private message packet. The packet is coming from either
2733 if (packet->flags & SILC_PACKET_FLAG_LIST)
2735 idata->last_receive = time(NULL);
2736 silc_server_private_message(server, sock, packet);
2739 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2741 * Private message key packet.
2743 if (packet->flags & SILC_PACKET_FLAG_LIST)
2745 silc_server_private_message_key(server, sock, packet);
2749 * Key Exchange protocol packets
2751 case SILC_PACKET_KEY_EXCHANGE:
2752 if (packet->flags & SILC_PACKET_FLAG_LIST)
2755 if (sock->protocol && sock->protocol->protocol &&
2756 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2757 SilcServerKEInternalContext *proto_ctx =
2758 (SilcServerKEInternalContext *)sock->protocol->context;
2760 proto_ctx->packet = silc_packet_context_dup(packet);
2762 /* Let the protocol handle the packet */
2763 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2765 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2766 "protocol active (%s:%d [%s]).", sock->hostname,
2768 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2769 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2770 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2775 case SILC_PACKET_KEY_EXCHANGE_1:
2776 if (packet->flags & SILC_PACKET_FLAG_LIST)
2779 if (sock->protocol && sock->protocol->protocol &&
2780 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2781 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2783 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2784 SilcServerRekeyInternalContext *proto_ctx =
2785 (SilcServerRekeyInternalContext *)sock->protocol->context;
2787 if (proto_ctx->packet)
2788 silc_packet_context_free(proto_ctx->packet);
2790 proto_ctx->packet = silc_packet_context_dup(packet);
2792 /* Let the protocol handle the packet */
2793 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2795 SilcServerKEInternalContext *proto_ctx =
2796 (SilcServerKEInternalContext *)sock->protocol->context;
2798 if (proto_ctx->packet)
2799 silc_packet_context_free(proto_ctx->packet);
2801 proto_ctx->packet = silc_packet_context_dup(packet);
2802 proto_ctx->dest_id_type = packet->src_id_type;
2803 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2804 packet->src_id_type);
2805 if (!proto_ctx->dest_id)
2808 /* Let the protocol handle the packet */
2809 silc_protocol_execute(sock->protocol, server->schedule,
2813 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2814 "protocol active (%s:%d [%s]).", sock->hostname,
2816 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2817 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2818 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2823 case SILC_PACKET_KEY_EXCHANGE_2:
2824 if (packet->flags & SILC_PACKET_FLAG_LIST)
2827 if (sock->protocol && sock->protocol->protocol &&
2828 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2829 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2831 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2832 SilcServerRekeyInternalContext *proto_ctx =
2833 (SilcServerRekeyInternalContext *)sock->protocol->context;
2835 if (proto_ctx->packet)
2836 silc_packet_context_free(proto_ctx->packet);
2838 proto_ctx->packet = silc_packet_context_dup(packet);
2840 /* Let the protocol handle the packet */
2841 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2843 SilcServerKEInternalContext *proto_ctx =
2844 (SilcServerKEInternalContext *)sock->protocol->context;
2846 if (proto_ctx->packet)
2847 silc_packet_context_free(proto_ctx->packet);
2849 proto_ctx->packet = silc_packet_context_dup(packet);
2850 proto_ctx->dest_id_type = packet->src_id_type;
2851 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2852 packet->src_id_type);
2853 if (!proto_ctx->dest_id)
2856 /* Let the protocol handle the packet */
2857 silc_protocol_execute(sock->protocol, server->schedule,
2861 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2862 "protocol active (%s:%d [%s]).", sock->hostname,
2864 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2865 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2866 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2871 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2873 * Connection authentication request packet. When we receive this packet
2874 * we will send to the other end information about our mandatory
2875 * authentication method for the connection. This packet maybe received
2878 if (packet->flags & SILC_PACKET_FLAG_LIST)
2880 silc_server_connection_auth_request(server, sock, packet);
2884 * Connection Authentication protocol packets
2886 case SILC_PACKET_CONNECTION_AUTH:
2887 /* Start of the authentication protocol. We receive here the
2888 authentication data and will verify it. */
2889 if (packet->flags & SILC_PACKET_FLAG_LIST)
2892 if (sock->protocol && sock->protocol->protocol->type
2893 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2895 SilcServerConnAuthInternalContext *proto_ctx =
2896 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2898 proto_ctx->packet = silc_packet_context_dup(packet);
2900 /* Let the protocol handle the packet */
2901 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2903 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2904 "protocol active (%s:%d [%s]).", sock->hostname,
2906 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2907 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2908 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2913 case SILC_PACKET_NEW_ID:
2915 * Received New ID packet. This includes some new ID that has been
2916 * created. It may be for client, server or channel. This is the way
2917 * to distribute information about new registered entities in the
2920 if (packet->flags & SILC_PACKET_FLAG_LIST)
2921 silc_server_new_id_list(server, sock, packet);
2923 silc_server_new_id(server, sock, packet);
2926 case SILC_PACKET_NEW_CLIENT:
2928 * Received new client packet. This includes client information that
2929 * we will use to create initial client ID. After creating new
2930 * ID we will send it to the client.
2932 if (packet->flags & SILC_PACKET_FLAG_LIST)
2934 silc_server_new_client(server, sock, packet);
2937 case SILC_PACKET_NEW_SERVER:
2939 * Received new server packet. This includes Server ID and some other
2940 * information that we may save. This is received after server has
2943 if (packet->flags & SILC_PACKET_FLAG_LIST)
2945 silc_server_new_server(server, sock, packet);
2948 case SILC_PACKET_NEW_CHANNEL:
2950 * Received new channel packet. Information about new channel in the
2951 * network are distributed using this packet.
2953 if (packet->flags & SILC_PACKET_FLAG_LIST)
2954 silc_server_new_channel_list(server, sock, packet);
2956 silc_server_new_channel(server, sock, packet);
2959 case SILC_PACKET_HEARTBEAT:
2961 * Received heartbeat.
2963 if (packet->flags & SILC_PACKET_FLAG_LIST)
2967 case SILC_PACKET_KEY_AGREEMENT:
2969 * Received heartbeat.
2971 if (packet->flags & SILC_PACKET_FLAG_LIST)
2973 silc_server_key_agreement(server, sock, packet);
2976 case SILC_PACKET_REKEY:
2978 * Received re-key packet. The sender wants to regenerate the session
2981 if (packet->flags & SILC_PACKET_FLAG_LIST)
2983 silc_server_rekey(server, sock, packet);
2986 case SILC_PACKET_REKEY_DONE:
2988 * The re-key is done.
2990 if (packet->flags & SILC_PACKET_FLAG_LIST)
2993 if (sock->protocol && sock->protocol->protocol &&
2994 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2996 SilcServerRekeyInternalContext *proto_ctx =
2997 (SilcServerRekeyInternalContext *)sock->protocol->context;
2999 if (proto_ctx->packet)
3000 silc_packet_context_free(proto_ctx->packet);
3002 proto_ctx->packet = silc_packet_context_dup(packet);
3004 /* Let the protocol handle the packet */
3005 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
3007 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
3008 "protocol active (%s:%d [%s]).", sock->hostname,
3010 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3011 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3012 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3017 case SILC_PACKET_FTP:
3019 if (packet->flags & SILC_PACKET_FLAG_LIST)
3021 silc_server_ftp(server, sock, packet);
3024 case SILC_PACKET_RESUME_CLIENT:
3026 if (packet->flags & SILC_PACKET_FLAG_LIST)
3028 silc_server_resume_client(server, sock, packet);
3031 case SILC_PACKET_RESUME_ROUTER:
3032 /* Resume router packet received. This packet is received for backup
3033 router resuming protocol. */
3034 if (packet->flags & SILC_PACKET_FLAG_LIST)
3036 silc_server_backup_resume_router(server, sock, packet);
3040 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
3045 /* Creates connection to a remote router. */
3047 void silc_server_create_connection(SilcServer server,
3048 const char *remote_host, SilcUInt32 port)
3050 SilcServerConnection sconn;
3052 /* Allocate connection object for hold connection specific stuff. */
3053 sconn = silc_calloc(1, sizeof(*sconn));
3054 sconn->remote_host = strdup(remote_host);
3055 sconn->remote_port = port;
3056 sconn->no_reconnect = TRUE;
3058 silc_schedule_task_add(server->schedule, 0,
3059 silc_server_connect_router,
3060 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
3061 SILC_TASK_PRI_NORMAL);
3064 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3066 SilcServer server = app_context;
3067 SilcSocketConnection sock = context;
3069 SILC_LOG_DEBUG(("Deleting socket %p", sock));
3071 /* Close the actual connection */
3072 silc_net_close_connection(sock->sock);
3073 server->sockets[sock->sock] = NULL;
3075 /* We won't listen for this connection anymore */
3076 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3077 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
3079 silc_socket_free(sock);
3082 /* Closes connection to socket connection */
3084 void silc_server_close_connection(SilcServer server,
3085 SilcSocketConnection sock)
3089 if (SILC_IS_DISCONNECTED(sock)) {
3090 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3091 silc_schedule_task_add(server->schedule, sock->sock,
3092 silc_server_close_connection_final,
3093 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3094 SILC_TASK_PRI_NORMAL);
3095 server->sockets[sock->sock] = NULL;
3099 /* If any protocol is active cancel its execution. It will call
3100 the final callback which will finalize the disconnection. */
3101 if (sock->protocol && sock->protocol->protocol &&
3102 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3103 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3104 silc_protocol_cancel(sock->protocol, server->schedule);
3105 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3106 silc_protocol_execute_final(sock->protocol, server->schedule);
3107 sock->protocol = NULL;
3111 memset(tmp, 0, sizeof(tmp));
3112 silc_socket_get_error(sock, tmp, sizeof(tmp));
3113 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
3115 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3116 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3117 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3118 "Router"), tmp[0] ? tmp : ""));
3120 SILC_SET_DISCONNECTED(sock);
3121 silc_schedule_task_add(server->schedule, sock->sock,
3122 silc_server_close_connection_final,
3123 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3124 SILC_TASK_PRI_NORMAL);
3125 server->sockets[sock->sock] = NULL;
3128 /* Sends disconnect message to remote connection and disconnects the
3129 connection. NOTE: If this is called from protocol callback
3130 then sock->protocol must be set NULL before calling this, since
3131 this routine dispatches protocol callbacks too. */
3133 void silc_server_disconnect_remote(SilcServer server,
3134 SilcSocketConnection sock,
3135 SilcStatus status, ...)
3138 unsigned char buf[512];
3146 if (SILC_IS_DISCONNECTING(sock)) {
3147 SILC_SET_DISCONNECTED(sock);
3148 silc_server_close_connection(server, sock);
3152 memset(buf, 0, sizeof(buf));
3153 va_start(ap, status);
3154 cp = va_arg(ap, char *);
3156 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3161 SILC_LOG_DEBUG(("Disconnecting remote host"));
3163 /* Notify remote end that the conversation is over. The notify message
3164 is tried to be sent immediately. */
3168 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3170 buffer = silc_buffer_alloc_size(len);
3174 buffer->data[0] = status;
3176 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3178 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3179 buffer->data, buffer->len, TRUE);
3180 silc_buffer_free(buffer);
3183 silc_server_packet_queue_purge(server, sock);
3185 /* Mark the connection to be disconnected */
3186 SILC_SET_DISCONNECTING(sock);
3187 silc_server_close_connection(server, sock);
3190 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3192 SilcServer server = app_context;
3193 SilcClientEntry client = context;
3195 assert(!silc_hash_table_count(client->channels));
3197 silc_idlist_del_data(client);
3198 silc_idcache_purge_by_context(server->local_list->clients, client);
3201 /* Frees client data and notifies about client's signoff. */
3203 void silc_server_free_client_data(SilcServer server,
3204 SilcSocketConnection sock,
3205 SilcClientEntry client,
3207 const char *signoff)
3209 SILC_LOG_DEBUG(("Freeing client data"));
3211 /* If there is pending outgoing data for the client then purge it
3212 to the network before removing the client entry. */
3213 silc_server_packet_queue_purge(server, sock);
3216 /* Check if anyone is watching this nickname */
3217 if (server->server_type == SILC_ROUTER)
3218 silc_server_check_watcher_list(server, client, NULL,
3219 SILC_NOTIFY_TYPE_SIGNOFF);
3221 /* Send SIGNOFF notify to routers. */
3223 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3224 SILC_BROADCAST(server), client->id,
3228 /* Remove client from all channels */
3230 silc_server_remove_from_channels(server, NULL, client,
3231 TRUE, (char *)signoff, TRUE, FALSE);
3233 silc_server_remove_from_channels(server, NULL, client,
3234 FALSE, NULL, FALSE, FALSE);
3236 /* Remove this client from watcher list if it is */
3237 silc_server_del_from_watcher_list(server, client);
3239 /* Update statistics */
3240 server->stat.my_clients--;
3241 server->stat.clients--;
3242 if (server->stat.cell_clients)
3243 server->stat.cell_clients--;
3244 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3245 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3246 silc_schedule_task_del_by_context(server->schedule, client);
3248 /* We will not delete the client entry right away. We will take it
3249 into history (for WHOWAS command) for 5 minutes, unless we're
3250 shutting down server. */
3251 if (!server->server_shutdown) {
3252 silc_schedule_task_add(server->schedule, 0,
3253 silc_server_free_client_data_timeout,
3255 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3256 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3257 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3259 client->router = NULL;
3260 client->connection = NULL;
3262 /* Delete directly since we're shutting down server */
3263 silc_idlist_del_data(client);
3264 silc_idlist_del_client(server->local_list, client);
3268 /* Frees user_data pointer from socket connection object. This also sends
3269 appropriate notify packets to the network to inform about leaving
3272 void silc_server_free_sock_user_data(SilcServer server,
3273 SilcSocketConnection sock,
3274 const char *signoff_message)
3277 /* If any protocol is active cancel its execution */
3278 if (sock->protocol && sock->protocol->protocol &&
3279 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3280 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3281 silc_protocol_cancel(sock->protocol, server->schedule);
3282 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3283 silc_protocol_execute_final(sock->protocol, server->schedule);
3284 sock->protocol = NULL;
3287 switch (sock->type) {
3288 case SILC_SOCKET_TYPE_CLIENT:
3290 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3291 silc_server_free_client_data(server, sock, user_data, TRUE,
3295 case SILC_SOCKET_TYPE_SERVER:
3296 case SILC_SOCKET_TYPE_ROUTER:
3298 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3299 SilcServerEntry backup_router = NULL;
3301 SILC_LOG_DEBUG(("Freeing server data"));
3304 backup_router = silc_server_backup_get(server, user_data->id);
3306 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3307 backup_router == server->id_entry &&
3308 sock->type != SILC_SOCKET_TYPE_ROUTER)
3309 backup_router = NULL;
3311 if (server->server_shutdown || server->backup_noswitch)
3312 backup_router = NULL;
3314 /* If this was our primary router connection then we're lost to
3315 the outside world. */
3316 if (server->router == user_data) {
3317 /* Check whether we have a backup router connection */
3318 if (!backup_router || backup_router == user_data) {
3319 silc_server_create_connections(server);
3320 server->id_entry->router = NULL;
3321 server->router = NULL;
3322 server->standalone = TRUE;
3323 server->backup_primary = FALSE;
3324 backup_router = NULL;
3326 if (server->id_entry != backup_router) {
3327 SILC_LOG_INFO(("New primary router is backup router %s",
3328 backup_router->server_name));
3329 server->id_entry->router = backup_router;
3330 server->router = backup_router;
3331 server->router_connect = time(0);
3332 server->backup_primary = TRUE;
3333 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3335 /* Send START_USE to backup router to indicate we have switched */
3336 silc_server_backup_send_start_use(server,
3337 backup_router->connection,
3340 SILC_LOG_INFO(("We are now new primary router in this cell"));
3341 server->id_entry->router = NULL;
3342 server->router = NULL;
3343 server->standalone = TRUE;
3346 /* We stop here to take a breath */
3349 if (server->backup_router) {
3350 server->server_type = SILC_ROUTER;
3352 /* We'll need to constantly try to reconnect to the primary
3353 router so that we'll see when it comes back online. */
3354 silc_server_backup_reconnect(server, sock->ip, sock->port,
3355 silc_server_backup_connected,
3359 /* Mark this connection as replaced */
3360 silc_server_backup_replaced_add(server, user_data->id,
3363 } else if (backup_router) {
3364 SILC_LOG_INFO(("Enabling the use of backup router %s",
3365 backup_router->server_name));
3367 /* Mark this connection as replaced */
3368 silc_server_backup_replaced_add(server, user_data->id,
3370 } else if (server->server_type == SILC_SERVER &&
3371 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3372 /* Reconnect to the router (backup) */
3373 silc_server_create_connections(server);
3376 if (user_data->server_name)
3377 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3378 ("Server %s signoff", user_data->server_name));
3380 if (!backup_router) {
3381 /* Remove all servers that are originated from this server, and
3382 remove the clients of those servers too. */
3383 silc_server_remove_servers_by_server(server, user_data, TRUE);
3386 /* Remove the clients that this server owns as they will become
3387 invalid now too. For backup router the server is actually
3388 coming from the primary router, so mark that as the owner
3390 if (server->server_type == SILC_BACKUP_ROUTER &&
3391 sock->type == SILC_SOCKET_TYPE_SERVER)
3392 silc_server_remove_clients_by_server(server, server->router,
3396 silc_server_remove_clients_by_server(server, user_data,
3399 /* Remove channels owned by this server */
3400 if (server->server_type == SILC_SERVER)
3401 silc_server_remove_channels_by_server(server, user_data);
3403 /* Enable local server connections that may be disabled */
3404 silc_server_local_servers_toggle_enabled(server, TRUE);
3406 /* Update the client entries of this server to the new backup
3407 router. If we are the backup router we also resolve the real
3408 servers for the clients. After updating is over this also
3409 removes the clients that this server explicitly owns. */
3410 silc_server_update_clients_by_server(server, user_data,
3411 backup_router, TRUE);
3413 /* If we are router and just lost our primary router (now standlaone)
3414 we remove everything that was behind it, since we don't know
3416 if (server->server_type == SILC_ROUTER && server->standalone)
3417 /* Remove all servers that are originated from this server, and
3418 remove the clients of those servers too. */
3419 silc_server_remove_servers_by_server(server, user_data, TRUE);
3421 /* Finally remove the clients that are explicitly owned by this
3422 server. They go down with the server. */
3423 silc_server_remove_clients_by_server(server, user_data,
3426 /* Update our server cache to use the new backup router too. */
3427 silc_server_update_servers_by_server(server, user_data, backup_router);
3428 if (server->server_type == SILC_SERVER)
3429 silc_server_update_channels_by_server(server, user_data,
3432 /* Send notify about primary router going down to local operators */
3433 if (server->backup_router)
3434 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3435 SILC_NOTIFY_TYPE_NONE,
3436 ("%s switched to backup router %s "
3437 "(we are primary router now)",
3438 server->server_name, server->server_name));
3439 else if (server->router)
3440 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3441 SILC_NOTIFY_TYPE_NONE,
3442 ("%s switched to backup router %s",
3443 server->server_name,
3444 server->router->server_name));
3446 server->backup_noswitch = FALSE;
3448 /* Free the server entry */
3449 silc_server_backup_del(server, user_data);
3450 silc_server_backup_replaced_del(server, user_data);
3451 silc_idlist_del_data(user_data);
3452 if (!silc_idlist_del_server(server->local_list, user_data))
3453 silc_idlist_del_server(server->global_list, user_data);
3454 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3455 server->stat.my_servers--;
3457 server->stat.my_routers--;
3458 server->stat.routers--;
3460 server->stat.servers--;
3461 if (server->server_type == SILC_ROUTER)
3462 server->stat.cell_servers--;
3464 if (backup_router && backup_router != server->id_entry) {
3465 /* Announce all of our stuff that was created about 5 minutes ago.
3466 The backup router knows all the other stuff already. */
3467 if (server->server_type == SILC_ROUTER)
3468 silc_server_announce_servers(server, FALSE, time(0) - 300,
3469 backup_router->connection);
3471 /* Announce our clients and channels to the router */
3472 silc_server_announce_clients(server, time(0) - 300,
3473 backup_router->connection);
3474 silc_server_announce_channels(server, time(0) - 300,
3475 backup_router->connection);
3481 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3483 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3485 silc_idlist_del_data(user_data);
3486 silc_free(user_data);
3491 sock->user_data = NULL;
3494 /* Removes client from all channels it has joined. This is used when client
3495 connection is disconnected. If the client on a channel is last, the
3496 channel is removed as well. This sends the SIGNOFF notify types. */
3498 void silc_server_remove_from_channels(SilcServer server,
3499 SilcSocketConnection sock,
3500 SilcClientEntry client,
3502 const char *signoff_message,
3506 SilcChannelEntry channel;
3507 SilcChannelClientEntry chl;
3508 SilcHashTableList htl;
3509 SilcBuffer clidp = NULL;
3514 SILC_LOG_DEBUG(("Removing client from joined channels"));
3516 if (notify && !client->id)
3520 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3525 /* Remove the client from all channels. The client is removed from
3526 the channels' user list. */
3527 silc_hash_table_list(client->channels, &htl);
3528 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3529 channel = chl->channel;
3531 /* Remove channel if this is last client leaving the channel, unless
3532 the channel is permanent. */
3533 if (server->server_type != SILC_SERVER &&
3534 silc_hash_table_count(channel->user_list) < 2) {
3535 silc_server_channel_delete(server, channel);
3539 silc_hash_table_del(client->channels, channel);
3540 silc_hash_table_del(channel->user_list, client);
3541 channel->user_count--;
3543 /* If there is no global users on the channel anymore mark the channel
3544 as local channel. Do not check if the removed client is local client. */
3545 if (server->server_type == SILC_SERVER && channel->global_users &&
3546 chl->client->router && !silc_server_channel_has_global(channel))
3547 channel->global_users = FALSE;
3549 memset(chl, 'A', sizeof(*chl));
3552 /* Update statistics */
3553 if (SILC_IS_LOCAL(client))
3554 server->stat.my_chanclients--;
3555 if (server->server_type == SILC_ROUTER) {
3556 server->stat.cell_chanclients--;
3557 server->stat.chanclients--;
3560 /* If there is not at least one local user on the channel then we don't
3561 need the channel entry anymore, we can remove it safely, unless the
3562 channel is permanent channel */
3563 if (server->server_type == SILC_SERVER &&
3564 !silc_server_channel_has_local(channel)) {
3565 /* Notify about leaving client if this channel has global users. */
3566 if (notify && channel->global_users)
3567 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3568 SILC_NOTIFY_TYPE_SIGNOFF,
3569 signoff_message ? 2 : 1,
3570 clidp->data, clidp->len,
3571 signoff_message, signoff_message ?
3572 strlen(signoff_message) : 0);
3574 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3575 silc_server_channel_delete(server, channel);
3579 /* Send notify to channel about client leaving SILC and channel too */
3581 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3582 SILC_NOTIFY_TYPE_SIGNOFF,
3583 signoff_message ? 2 : 1,
3584 clidp->data, clidp->len,
3585 signoff_message, signoff_message ?
3586 strlen(signoff_message) : 0);
3588 if (killed && clidp) {
3589 /* Remove the client from channel's invite list */
3590 if (channel->invite_list &&
3591 silc_hash_table_count(channel->invite_list)) {
3593 SilcArgumentPayload iargs;
3594 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3596 iargs = silc_argument_payload_parse(ab->data, ab->len, 1);
3597 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3598 silc_buffer_free(ab);
3599 silc_argument_payload_free(iargs);
3603 /* Don't create keys if we are shutting down */
3604 if (server->server_shutdown)
3607 /* Re-generate channel key if needed */
3608 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3609 if (!silc_server_create_channel_key(server, channel, 0))
3612 /* Send the channel key to the channel. The key of course is not sent
3613 to the client who was removed from the channel. */
3614 silc_server_send_channel_key(server, client->connection, channel,
3615 server->server_type == SILC_ROUTER ?
3616 FALSE : !server->standalone);
3620 silc_hash_table_list_reset(&htl);
3622 silc_buffer_free(clidp);
3625 /* Removes client from one channel. This is used for example when client
3626 calls LEAVE command to remove itself from the channel. Returns TRUE
3627 if channel still exists and FALSE if the channel is removed when
3628 last client leaves the channel. If `notify' is FALSE notify messages
3631 bool silc_server_remove_from_one_channel(SilcServer server,
3632 SilcSocketConnection sock,
3633 SilcChannelEntry channel,
3634 SilcClientEntry client,
3637 SilcChannelClientEntry chl;
3640 SILC_LOG_DEBUG(("Removing %s from channel %s",
3641 silc_id_render(client->id, SILC_ID_CLIENT),
3642 channel->channel_name));
3644 /* Get the entry to the channel, if this client is not on the channel
3646 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3649 /* Remove channel if this is last client leaving the channel, unless
3650 the channel is permanent. */
3651 if (server->server_type != SILC_SERVER &&
3652 silc_hash_table_count(channel->user_list) < 2) {
3653 silc_server_channel_delete(server, channel);
3657 silc_hash_table_del(client->channels, channel);
3658 silc_hash_table_del(channel->user_list, client);
3659 channel->user_count--;
3661 /* If there is no global users on the channel anymore mark the channel
3662 as local channel. Do not check if the client is local client. */
3663 if (server->server_type == SILC_SERVER && channel->global_users &&
3664 chl->client->router && !silc_server_channel_has_global(channel))
3665 channel->global_users = FALSE;
3667 memset(chl, 'O', sizeof(*chl));
3670 /* Update statistics */
3671 if (SILC_IS_LOCAL(client))
3672 server->stat.my_chanclients--;
3673 if (server->server_type == SILC_ROUTER) {
3674 server->stat.cell_chanclients--;
3675 server->stat.chanclients--;
3678 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3682 /* If there is not at least one local user on the channel then we don't
3683 need the channel entry anymore, we can remove it safely, unless the
3684 channel is permanent channel */
3685 if (server->server_type == SILC_SERVER &&
3686 !silc_server_channel_has_local(channel)) {
3687 /* Notify about leaving client if this channel has global users. */
3688 if (notify && channel->global_users)
3689 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3690 SILC_NOTIFY_TYPE_LEAVE, 1,
3691 clidp->data, clidp->len);
3693 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3694 silc_server_channel_delete(server, channel);
3695 silc_buffer_free(clidp);
3699 /* Send notify to channel about client leaving the channel */
3701 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3702 SILC_NOTIFY_TYPE_LEAVE, 1,
3703 clidp->data, clidp->len);
3705 silc_buffer_free(clidp);
3709 /* Timeout callback. This is called if connection is idle or for some
3710 other reason is not responding within some period of time. This
3711 disconnects the remote end. */
3713 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3715 SilcServer server = (SilcServer)context;
3716 SilcSocketConnection sock = server->sockets[fd];
3717 SilcProtocolType protocol = 0;
3719 SILC_LOG_DEBUG(("Start"));
3724 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3725 sock->hostname, sock->ip));
3727 /* If we have protocol active we must assure that we call the protocol's
3728 final callback so that all the memory is freed. */
3729 if (sock->protocol && sock->protocol->protocol &&
3730 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3731 protocol = sock->protocol->protocol->type;
3732 silc_protocol_cancel(sock->protocol, server->schedule);
3733 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3734 silc_protocol_execute_final(sock->protocol, server->schedule);
3735 sock->protocol = NULL;
3739 silc_server_disconnect_remote(server, sock,
3741 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3742 SILC_STATUS_ERR_AUTH_FAILED :
3743 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3744 "Connection timeout");
3746 if (sock->user_data)
3747 silc_server_free_sock_user_data(server, sock, NULL);
3750 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3751 function may be used only by router. In real SILC network all channels
3752 are created by routers thus this function is never used by normal
3755 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3756 SilcServerID *router_id,
3762 SilcChannelID *channel_id;
3763 SilcChannelEntry entry;
3767 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3770 cipher = SILC_DEFAULT_CIPHER;
3772 hmac = SILC_DEFAULT_HMAC;
3774 /* Allocate cipher */
3775 if (!silc_cipher_alloc(cipher, &key))
3779 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3780 silc_cipher_free(key);
3784 channel_name = strdup(channel_name);
3786 /* Create the channel ID */
3787 if (!silc_id_create_channel_id(server, router_id, server->rng,
3789 silc_free(channel_name);
3790 silc_cipher_free(key);
3791 silc_hmac_free(newhmac);
3795 /* Create the channel */
3796 entry = silc_idlist_add_channel(server->local_list, channel_name,
3797 SILC_CHANNEL_MODE_NONE, channel_id,
3798 NULL, key, newhmac, 0);
3800 silc_free(channel_name);
3801 silc_cipher_free(key);
3802 silc_hmac_free(newhmac);
3803 silc_free(channel_id);
3807 entry->cipher = strdup(cipher);
3808 entry->hmac_name = strdup(hmac);
3810 /* Now create the actual key material */
3811 if (!silc_server_create_channel_key(server, entry,
3812 silc_cipher_get_key_len(key) / 8)) {
3813 silc_idlist_del_channel(server->local_list, entry);
3817 /* Notify other routers about the new channel. We send the packet
3818 to our primary route. */
3820 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3821 channel_name, entry->id,
3822 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3825 /* Distribute to backup routers */
3826 if (broadcast && server->server_type == SILC_ROUTER) {
3829 SilcUInt32 name_len = strlen(channel_name);
3830 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3831 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3833 packet = silc_channel_payload_encode(channel_name, name_len,
3834 cid, channel_id_len, entry->mode);
3835 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3836 packet->data, packet->len, FALSE, TRUE);
3838 silc_buffer_free(packet);
3841 server->stat.my_channels++;
3842 if (server->server_type == SILC_ROUTER) {
3843 server->stat.channels++;
3844 server->stat.cell_channels++;
3845 entry->users_resolved = TRUE;
3851 /* Same as above but creates the channel with Channel ID `channel_id. */
3854 silc_server_create_new_channel_with_id(SilcServer server,
3858 SilcChannelID *channel_id,
3861 SilcChannelEntry entry;
3865 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3868 cipher = SILC_DEFAULT_CIPHER;
3870 hmac = SILC_DEFAULT_HMAC;
3872 /* Allocate cipher */
3873 if (!silc_cipher_alloc(cipher, &key))
3877 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3878 silc_cipher_free(key);
3882 channel_name = strdup(channel_name);
3884 /* Create the channel */
3885 entry = silc_idlist_add_channel(server->local_list, channel_name,
3886 SILC_CHANNEL_MODE_NONE, channel_id,
3887 NULL, key, newhmac, 0);
3889 silc_cipher_free(key);
3890 silc_hmac_free(newhmac);
3891 silc_free(channel_name);
3895 /* Now create the actual key material */
3896 if (!silc_server_create_channel_key(server, entry,
3897 silc_cipher_get_key_len(key) / 8)) {
3898 silc_idlist_del_channel(server->local_list, entry);
3902 /* Notify other routers about the new channel. We send the packet
3903 to our primary route. */
3905 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3906 channel_name, entry->id,
3907 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3910 /* Distribute to backup routers */
3911 if (broadcast && server->server_type == SILC_ROUTER) {
3914 SilcUInt32 name_len = strlen(channel_name);
3915 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3916 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3918 packet = silc_channel_payload_encode(channel_name, name_len,
3919 cid, channel_id_len, entry->mode);
3920 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3921 packet->data, packet->len, FALSE, TRUE);
3923 silc_buffer_free(packet);
3926 server->stat.my_channels++;
3927 if (server->server_type == SILC_ROUTER) {
3928 server->stat.channels++;
3929 server->stat.cell_channels++;
3930 entry->users_resolved = TRUE;
3936 /* Channel's key re-key timeout callback. */
3938 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3940 SilcServer server = app_context;
3941 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3945 /* Return now if we are shutting down */
3946 if (server->server_shutdown)
3949 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3952 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3955 /* Generates new channel key. This is used to create the initial channel key
3956 but also to re-generate new key for channel. If `key_len' is provided
3957 it is the bytes of the key length. */
3959 bool silc_server_create_channel_key(SilcServer server,
3960 SilcChannelEntry channel,
3964 unsigned char channel_key[32], hash[32];
3967 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3968 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3972 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3974 if (!channel->channel_key)
3975 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3976 channel->channel_key = NULL;
3982 else if (channel->key_len)
3983 len = channel->key_len / 8;
3985 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3987 /* Create channel key */
3988 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3991 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3993 /* Remove old key if exists */
3995 memset(channel->key, 0, channel->key_len / 8);
3996 silc_free(channel->key);
4000 channel->key_len = len * 8;
4001 channel->key = silc_memdup(channel_key, len);
4002 memset(channel_key, 0, sizeof(channel_key));
4004 /* Generate HMAC key from the channel key data and set it */
4006 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4007 memset(channel->key, 0, channel->key_len / 8);
4008 silc_free(channel->key);
4009 channel->channel_key = NULL;
4012 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
4013 silc_hmac_set_key(channel->hmac, hash,
4014 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4015 memset(hash, 0, sizeof(hash));
4017 if (server->server_type == SILC_ROUTER) {
4018 if (!channel->rekey)
4019 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4020 channel->rekey->channel = channel;
4021 channel->rekey->key_len = key_len;
4022 if (channel->rekey->task)
4023 silc_schedule_task_del(server->schedule, channel->rekey->task);
4025 channel->rekey->task =
4026 silc_schedule_task_add(server->schedule, 0,
4027 silc_server_channel_key_rekey,
4028 (void *)channel->rekey,
4029 server->config->channel_rekey_secs, 0,
4031 SILC_TASK_PRI_NORMAL);
4037 /* Saves the channel key found in the encoded `key_payload' buffer. This
4038 function is used when we receive Channel Key Payload and also when we're
4039 processing JOIN command reply. Returns entry to the channel. */
4041 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
4042 SilcBuffer key_payload,
4043 SilcChannelEntry channel)
4045 SilcChannelKeyPayload payload = NULL;
4046 SilcChannelID *id = NULL;
4047 unsigned char *tmp, hash[32];
4051 /* Decode channel key payload */
4052 payload = silc_channel_key_payload_parse(key_payload->data,
4055 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
4060 /* Get the channel entry */
4063 /* Get channel ID */
4064 tmp = silc_channel_key_get_id(payload, &tmp_len);
4065 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
4071 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
4073 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
4075 if (server->server_type == SILC_ROUTER)
4076 SILC_LOG_ERROR(("Received key for non-existent channel %s",
4077 silc_id_render(id, SILC_ID_CHANNEL)));
4083 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4085 tmp = silc_channel_key_get_key(payload, &tmp_len);
4091 cipher = silc_channel_key_get_cipher(payload, NULL);
4097 /* Remove old key if exists */
4099 memset(channel->key, 0, channel->key_len / 8);
4100 silc_free(channel->key);
4101 silc_cipher_free(channel->channel_key);
4104 /* Create new cipher */
4105 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
4106 channel->channel_key = NULL;
4111 if (channel->cipher)
4112 silc_free(channel->cipher);
4113 channel->cipher = strdup(cipher);
4116 channel->key_len = tmp_len * 8;
4117 channel->key = silc_memdup(tmp, tmp_len);
4118 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
4120 /* Generate HMAC key from the channel key data and set it */
4122 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4123 memset(channel->key, 0, channel->key_len / 8);
4124 silc_free(channel->key);
4125 channel->channel_key = NULL;
4128 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4129 silc_hmac_set_key(channel->hmac, hash,
4130 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4132 memset(hash, 0, sizeof(hash));
4133 memset(tmp, 0, tmp_len);
4135 if (server->server_type == SILC_ROUTER) {
4136 if (!channel->rekey)
4137 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4138 channel->rekey->channel = channel;
4139 if (channel->rekey->task)
4140 silc_schedule_task_del(server->schedule, channel->rekey->task);
4142 channel->rekey->task =
4143 silc_schedule_task_add(server->schedule, 0,
4144 silc_server_channel_key_rekey,
4145 (void *)channel->rekey,
4146 server->config->channel_rekey_secs, 0,
4148 SILC_TASK_PRI_NORMAL);
4154 silc_channel_key_payload_free(payload);
4159 /* Heartbeat callback. This function is set as argument for the
4160 silc_socket_set_heartbeat function. The library will call this function
4161 at the set time interval. */
4163 void silc_server_perform_heartbeat(SilcSocketConnection sock,
4166 SilcServer server = hb_context;
4168 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
4169 sock->port, sock->ip));
4171 /* Send the heartbeat */
4172 silc_server_send_heartbeat(server, sock);
4175 /* Returns assembled of all servers in the given ID list. The packet's
4176 form is dictated by the New ID payload. */
4178 static void silc_server_announce_get_servers(SilcServer server,
4179 SilcServerEntry remote,
4181 SilcBuffer *servers,
4182 unsigned long creation_time)
4184 SilcIDCacheList list;
4185 SilcIDCacheEntry id_cache;
4186 SilcServerEntry entry;
4189 /* Go through all clients in the list */
4190 if (silc_idcache_get_all(id_list->servers, &list)) {
4191 if (silc_idcache_list_first(list, &id_cache)) {
4193 entry = (SilcServerEntry)id_cache->context;
4195 /* Do not announce the one we've sending our announcements and
4196 do not announce ourself. Also check the creation time if it's
4198 if ((entry == remote) || (entry == server->id_entry) ||
4199 (creation_time && entry->data.created < creation_time)) {
4200 if (!silc_idcache_list_next(list, &id_cache))
4205 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4207 *servers = silc_buffer_realloc(*servers,
4209 (*servers)->truelen + idp->len :
4211 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4212 silc_buffer_put(*servers, idp->data, idp->len);
4213 silc_buffer_pull(*servers, idp->len);
4214 silc_buffer_free(idp);
4216 if (!silc_idcache_list_next(list, &id_cache))
4221 silc_idcache_list_free(list);
4226 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4232 p = silc_notify_payload_encode(notify, argc, ap);
4238 /* This function is used by router to announce existing servers to our
4239 primary router when we've connected to it. If `creation_time' is non-zero
4240 then only the servers that has been created after the `creation_time'
4241 will be announced. */
4243 void silc_server_announce_servers(SilcServer server, bool global,
4244 unsigned long creation_time,
4245 SilcSocketConnection remote)
4247 SilcBuffer servers = NULL;
4249 SILC_LOG_DEBUG(("Announcing servers"));
4251 /* Get servers in local list */
4252 silc_server_announce_get_servers(server, remote->user_data,
4253 server->local_list, &servers,
4257 /* Get servers in global list */
4258 silc_server_announce_get_servers(server, remote->user_data,
4259 server->global_list, &servers,
4263 silc_buffer_push(servers, servers->data - servers->head);
4264 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4266 /* Send the packet */
4267 silc_server_packet_send(server, remote,
4268 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4269 servers->data, servers->len, TRUE);
4271 silc_buffer_free(servers);
4275 /* Returns assembled packet of all clients in the given ID list. The
4276 packet's form is dictated by the New ID Payload. */
4278 static void silc_server_announce_get_clients(SilcServer server,
4280 SilcBuffer *clients,
4282 unsigned long creation_time)
4284 SilcIDCacheList list;
4285 SilcIDCacheEntry id_cache;
4286 SilcClientEntry client;
4289 unsigned char mode[4];
4291 /* Go through all clients in the list */
4292 if (silc_idcache_get_all(id_list->clients, &list)) {
4293 if (silc_idcache_list_first(list, &id_cache)) {
4295 client = (SilcClientEntry)id_cache->context;
4297 if (creation_time && client->data.created < creation_time) {
4298 if (!silc_idcache_list_next(list, &id_cache))
4302 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4303 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4304 if (!silc_idcache_list_next(list, &id_cache))
4309 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4311 *clients = silc_buffer_realloc(*clients,
4313 (*clients)->truelen + idp->len :
4315 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4316 silc_buffer_put(*clients, idp->data, idp->len);
4317 silc_buffer_pull(*clients, idp->len);
4319 SILC_PUT32_MSB(client->mode, mode);
4321 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4322 2, idp->data, idp->len,
4324 *umodes = silc_buffer_realloc(*umodes,
4326 (*umodes)->truelen + tmp->len :
4328 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4329 silc_buffer_put(*umodes, tmp->data, tmp->len);
4330 silc_buffer_pull(*umodes, tmp->len);
4331 silc_buffer_free(tmp);
4333 silc_buffer_free(idp);
4335 if (!silc_idcache_list_next(list, &id_cache))
4340 silc_idcache_list_free(list);
4344 /* This function is used to announce our existing clients to our router
4345 when we've connected to it. If `creation_time' is non-zero then only
4346 the clients that has been created after the `creation_time' will be
4349 void silc_server_announce_clients(SilcServer server,
4350 unsigned long creation_time,
4351 SilcSocketConnection remote)
4353 SilcBuffer clients = NULL;
4354 SilcBuffer umodes = NULL;
4356 SILC_LOG_DEBUG(("Announcing clients"));
4358 /* Get clients in local list */
4359 silc_server_announce_get_clients(server, server->local_list,
4360 &clients, &umodes, creation_time);
4362 /* As router we announce our global list as well */
4363 if (server->server_type == SILC_ROUTER)
4364 silc_server_announce_get_clients(server, server->global_list,
4365 &clients, &umodes, creation_time);
4368 silc_buffer_push(clients, clients->data - clients->head);
4369 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4371 /* Send the packet */
4372 silc_server_packet_send(server, remote,
4373 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4374 clients->data, clients->len, TRUE);
4376 silc_buffer_free(clients);
4380 silc_buffer_push(umodes, umodes->data - umodes->head);
4381 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4383 /* Send the packet */
4384 silc_server_packet_send(server, remote,
4385 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4386 umodes->data, umodes->len, TRUE);
4388 silc_buffer_free(umodes);
4392 /* Returns channel's topic for announcing it */
4394 void silc_server_announce_get_channel_topic(SilcServer server,
4395 SilcChannelEntry channel,
4400 if (channel->topic) {
4401 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4402 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4403 chidp->data, chidp->len,
4405 strlen(channel->topic));
4406 silc_buffer_free(chidp);
4410 /* Returns channel's invite and ban lists */
4412 void silc_server_announce_get_inviteban(SilcServer server,
4413 SilcChannelEntry channel,
4417 SilcBuffer list, idp, idp2, tmp2;
4419 SilcHashTableList htl;
4420 const unsigned char a[1] = { 0x03 };
4422 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4424 /* Encode invite list */
4425 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4426 list = silc_buffer_alloc_size(2);
4427 type = silc_hash_table_count(channel->invite_list);
4428 SILC_PUT16_MSB(type, list->data);
4429 silc_hash_table_list(channel->invite_list, &htl);
4430 while (silc_hash_table_get(&htl, (void **)&type, (void **)&tmp2))
4431 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4433 silc_hash_table_list_reset(&htl);
4435 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4437 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4438 idp->data, idp->len,
4439 channel->channel_name,
4440 strlen(channel->channel_name),
4441 idp2->data, idp2->len,
4443 list->data, list->len);
4444 silc_buffer_free(idp2);
4445 silc_buffer_free(list);
4448 /* Encode ban list */
4449 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4450 list = silc_buffer_alloc_size(2);
4451 type = silc_hash_table_count(channel->ban_list);
4452 SILC_PUT16_MSB(type, list->data);
4453 silc_hash_table_list(channel->ban_list, &htl);
4454 while (silc_hash_table_get(&htl, (void **)&type, (void **)&tmp2))
4455 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4457 silc_hash_table_list_reset(&htl);
4460 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4461 idp->data, idp->len,
4463 list->data, list->len);
4464 silc_buffer_free(list);
4467 silc_buffer_free(idp);
4470 /* Returns assembled packets for channel users of the `channel'. */
4472 void silc_server_announce_get_channel_users(SilcServer server,
4473 SilcChannelEntry channel,
4474 SilcBuffer *channel_modes,
4475 SilcBuffer *channel_users,
4476 SilcBuffer *channel_users_modes)
4478 SilcChannelClientEntry chl;
4479 SilcHashTableList htl;
4480 SilcBuffer chidp, clidp, csidp;
4481 SilcBuffer tmp, fkey = NULL, chpklist;
4483 unsigned char mode[4];
4486 SILC_LOG_DEBUG(("Start"));
4488 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4489 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4490 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4493 SILC_PUT32_MSB(channel->mode, mode);
4494 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4495 if (channel->founder_key)
4496 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4498 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4499 7, csidp->data, csidp->len,
4502 hmac, hmac ? strlen(hmac) : 0,
4503 channel->passphrase,
4504 channel->passphrase ?
4505 strlen(channel->passphrase) : 0,
4506 fkey ? fkey->data : NULL,
4507 fkey ? fkey->len : 0,
4508 chpklist ? chpklist->data : NULL,
4509 chpklist ? chpklist->len : 0);
4512 silc_buffer_realloc(*channel_modes,
4514 (*channel_modes)->truelen + len : len));
4515 silc_buffer_pull_tail(*channel_modes,
4516 ((*channel_modes)->end -
4517 (*channel_modes)->data));
4518 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4519 silc_buffer_pull(*channel_modes, len);
4520 silc_buffer_free(tmp);
4521 silc_buffer_free(fkey);
4524 /* Now find all users on the channel */
4525 silc_hash_table_list(channel->user_list, &htl);
4526 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4527 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4530 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4531 clidp->data, clidp->len,
4532 chidp->data, chidp->len);
4535 silc_buffer_realloc(*channel_users,
4537 (*channel_users)->truelen + len : len));
4538 silc_buffer_pull_tail(*channel_users,
4539 ((*channel_users)->end -
4540 (*channel_users)->data));
4542 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4543 silc_buffer_pull(*channel_users, len);
4544 silc_buffer_free(tmp);
4546 /* CUMODE notify for mode change on the channel */
4547 SILC_PUT32_MSB(chl->mode, mode);
4548 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4549 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4550 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4551 4, csidp->data, csidp->len,
4553 clidp->data, clidp->len,
4554 fkey ? fkey->data : NULL,
4555 fkey ? fkey->len : 0);
4557 *channel_users_modes =
4558 silc_buffer_realloc(*channel_users_modes,
4559 (*channel_users_modes ?
4560 (*channel_users_modes)->truelen + len : len));
4561 silc_buffer_pull_tail(*channel_users_modes,
4562 ((*channel_users_modes)->end -
4563 (*channel_users_modes)->data));
4565 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4566 silc_buffer_pull(*channel_users_modes, len);
4567 silc_buffer_free(tmp);
4568 silc_buffer_free(fkey);
4570 silc_buffer_free(clidp);
4572 silc_hash_table_list_reset(&htl);
4573 silc_buffer_free(chidp);
4574 silc_buffer_free(csidp);
4577 /* Returns assembled packets for all channels and users on those channels
4578 from the given ID List. The packets are in the form dictated by the
4579 New Channel and New Channel User payloads. */
4581 void silc_server_announce_get_channels(SilcServer server,
4583 SilcBuffer *channels,
4584 SilcBuffer **channel_modes,
4585 SilcBuffer *channel_users,
4586 SilcBuffer **channel_users_modes,
4587 SilcUInt32 *channel_users_modes_c,
4588 SilcBuffer **channel_topics,
4589 SilcBuffer **channel_invites,
4590 SilcBuffer **channel_bans,
4591 SilcChannelID ***channel_ids,
4592 unsigned long creation_time)
4594 SilcIDCacheList list;
4595 SilcIDCacheEntry id_cache;
4596 SilcChannelEntry channel;
4599 SilcUInt16 name_len;
4601 int i = *channel_users_modes_c;
4604 SILC_LOG_DEBUG(("Start"));
4606 /* Go through all channels in the list */
4607 if (silc_idcache_get_all(id_list->channels, &list)) {
4608 if (silc_idcache_list_first(list, &id_cache)) {
4610 channel = (SilcChannelEntry)id_cache->context;
4612 if (creation_time && channel->created < creation_time)
4617 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4618 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4619 name_len = strlen(channel->channel_name);
4622 len = 4 + name_len + id_len + 4;
4624 silc_buffer_realloc(*channels,
4625 (*channels ? (*channels)->truelen +
4627 silc_buffer_pull_tail(*channels,
4628 ((*channels)->end - (*channels)->data));
4629 silc_buffer_format(*channels,
4630 SILC_STR_UI_SHORT(name_len),
4631 SILC_STR_UI_XNSTRING(channel->channel_name,
4633 SILC_STR_UI_SHORT(id_len),
4634 SILC_STR_UI_XNSTRING(cid, id_len),
4635 SILC_STR_UI_INT(channel->mode),
4637 silc_buffer_pull(*channels, len);
4640 if (creation_time && channel->updated < creation_time)
4646 /* Channel user modes */
4647 *channel_users_modes = silc_realloc(*channel_users_modes,
4648 sizeof(**channel_users_modes) *
4650 (*channel_users_modes)[i] = NULL;
4651 *channel_modes = silc_realloc(*channel_modes,
4652 sizeof(**channel_modes) * (i + 1));
4653 (*channel_modes)[i] = NULL;
4654 *channel_ids = silc_realloc(*channel_ids,
4655 sizeof(**channel_ids) * (i + 1));
4656 (*channel_ids)[i] = NULL;
4657 silc_server_announce_get_channel_users(server, channel,
4658 &(*channel_modes)[i],
4660 &(*channel_users_modes)[i]);
4661 (*channel_ids)[i] = channel->id;
4663 /* Channel's topic */
4664 *channel_topics = silc_realloc(*channel_topics,
4665 sizeof(**channel_topics) * (i + 1));
4666 (*channel_topics)[i] = NULL;
4667 silc_server_announce_get_channel_topic(server, channel,
4668 &(*channel_topics)[i]);
4670 /* Channel's invite and ban list */
4671 *channel_invites = silc_realloc(*channel_invites,
4672 sizeof(**channel_invites) * (i + 1));
4673 (*channel_invites)[i] = NULL;
4674 *channel_bans = silc_realloc(*channel_bans,
4675 sizeof(**channel_bans) * (i + 1));
4676 (*channel_bans)[i] = NULL;
4677 silc_server_announce_get_inviteban(server, channel,
4678 &(*channel_invites)[i],
4679 &(*channel_bans)[i]);
4681 (*channel_users_modes_c)++;
4687 if (!silc_idcache_list_next(list, &id_cache))
4692 silc_idcache_list_free(list);
4696 /* This function is used to announce our existing channels to our router
4697 when we've connected to it. This also announces the users on the
4698 channels to the router. If the `creation_time' is non-zero only the
4699 channels that was created after the `creation_time' are announced.
4700 Note that the channel users are still announced even if the `creation_time'
4703 void silc_server_announce_channels(SilcServer server,
4704 unsigned long creation_time,
4705 SilcSocketConnection remote)
4707 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4708 SilcBuffer *channel_users_modes = NULL;
4709 SilcBuffer *channel_topics = NULL;
4710 SilcBuffer *channel_invites = NULL;
4711 SilcBuffer *channel_bans = NULL;
4712 SilcUInt32 channel_users_modes_c = 0;
4713 SilcChannelID **channel_ids = NULL;
4715 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4717 /* Get channels and channel users in local list */
4718 silc_server_announce_get_channels(server, server->local_list,
4719 &channels, &channel_modes,
4721 &channel_users_modes,
4722 &channel_users_modes_c,
4726 &channel_ids, creation_time);
4728 /* Get channels and channel users in global list */
4729 if (server->server_type != SILC_SERVER)
4730 silc_server_announce_get_channels(server, server->global_list,
4731 &channels, &channel_modes,
4733 &channel_users_modes,
4734 &channel_users_modes_c,
4738 &channel_ids, creation_time);
4741 silc_buffer_push(channels, channels->data - channels->head);
4742 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4744 /* Send the packet */
4745 silc_server_packet_send(server, remote,
4746 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4747 channels->data, channels->len,
4750 silc_buffer_free(channels);
4753 if (channel_users) {
4754 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4755 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4756 channel_users->len);
4758 /* Send the packet */
4759 silc_server_packet_send(server, remote,
4760 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4761 channel_users->data, channel_users->len,
4764 silc_buffer_free(channel_users);
4767 if (channel_modes) {
4770 for (i = 0; i < channel_users_modes_c; i++) {
4771 if (!channel_modes[i])
4773 silc_buffer_push(channel_modes[i],
4774 channel_modes[i]->data -
4775 channel_modes[i]->head);
4776 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4777 channel_modes[i]->len);
4778 silc_server_packet_send_dest(server, remote,
4779 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4780 channel_ids[i], SILC_ID_CHANNEL,
4781 channel_modes[i]->data,
4782 channel_modes[i]->len,
4784 silc_buffer_free(channel_modes[i]);
4786 silc_free(channel_modes);
4789 if (channel_users_modes) {
4792 for (i = 0; i < channel_users_modes_c; i++) {
4793 if (!channel_users_modes[i])
4795 silc_buffer_push(channel_users_modes[i],
4796 channel_users_modes[i]->data -
4797 channel_users_modes[i]->head);
4798 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4799 channel_users_modes[i]->len);
4800 silc_server_packet_send_dest(server, remote,
4801 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4802 channel_ids[i], SILC_ID_CHANNEL,
4803 channel_users_modes[i]->data,
4804 channel_users_modes[i]->len,
4806 silc_buffer_free(channel_users_modes[i]);
4808 silc_free(channel_users_modes);
4811 if (channel_topics) {
4814 for (i = 0; i < channel_users_modes_c; i++) {
4815 if (!channel_topics[i])
4818 silc_buffer_push(channel_topics[i],
4819 channel_topics[i]->data -
4820 channel_topics[i]->head);
4821 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4822 channel_topics[i]->len);
4823 silc_server_packet_send_dest(server, remote,
4824 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4825 channel_ids[i], SILC_ID_CHANNEL,
4826 channel_topics[i]->data,
4827 channel_topics[i]->len,
4829 silc_buffer_free(channel_topics[i]);
4831 silc_free(channel_topics);
4834 if (channel_invites) {
4837 for (i = 0; i < channel_users_modes_c; i++) {
4838 if (!channel_invites[i])
4841 silc_buffer_push(channel_invites[i],
4842 channel_invites[i]->data -
4843 channel_invites[i]->head);
4844 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4845 channel_invites[i]->len);
4846 silc_server_packet_send_dest(server, remote,
4847 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4848 channel_ids[i], SILC_ID_CHANNEL,
4849 channel_invites[i]->data,
4850 channel_invites[i]->len,
4852 silc_buffer_free(channel_invites[i]);
4854 silc_free(channel_invites);
4860 for (i = 0; i < channel_users_modes_c; i++) {
4861 if (!channel_bans[i])
4864 silc_buffer_push(channel_bans[i],
4865 channel_bans[i]->data -
4866 channel_bans[i]->head);
4867 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4868 channel_bans[i]->len);
4869 silc_server_packet_send_dest(server, remote,
4870 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4871 channel_ids[i], SILC_ID_CHANNEL,
4872 channel_bans[i]->data,
4873 channel_bans[i]->len,
4875 silc_buffer_free(channel_bans[i]);
4877 silc_free(channel_bans);
4880 silc_free(channel_ids);
4883 /* Assembles user list and users mode list from the `channel'. */
4885 bool silc_server_get_users_on_channel(SilcServer server,
4886 SilcChannelEntry channel,
4887 SilcBuffer *user_list,
4888 SilcBuffer *mode_list,
4889 SilcUInt32 *user_count)
4891 SilcChannelClientEntry chl;
4892 SilcHashTableList htl;
4893 SilcBuffer client_id_list;
4894 SilcBuffer client_mode_list;
4896 SilcUInt32 list_count = 0, len = 0;
4898 if (!silc_hash_table_count(channel->user_list))
4901 silc_hash_table_list(channel->user_list, &htl);
4902 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4903 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4904 silc_hash_table_list_reset(&htl);
4906 client_id_list = silc_buffer_alloc(len);
4908 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4909 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4910 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4912 silc_hash_table_list(channel->user_list, &htl);
4913 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4915 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4916 silc_buffer_put(client_id_list, idp->data, idp->len);
4917 silc_buffer_pull(client_id_list, idp->len);
4918 silc_buffer_free(idp);
4920 /* Client's mode on channel */
4921 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4922 silc_buffer_pull(client_mode_list, 4);
4926 silc_hash_table_list_reset(&htl);
4927 silc_buffer_push(client_id_list,
4928 client_id_list->data - client_id_list->head);
4929 silc_buffer_push(client_mode_list,
4930 client_mode_list->data - client_mode_list->head);
4932 *user_list = client_id_list;
4933 *mode_list = client_mode_list;
4934 *user_count = list_count;
4938 /* Saves users and their modes to the `channel'. */
4940 void silc_server_save_users_on_channel(SilcServer server,
4941 SilcSocketConnection sock,
4942 SilcChannelEntry channel,
4943 SilcClientID *noadd,
4944 SilcBuffer user_list,
4945 SilcBuffer mode_list,
4946 SilcUInt32 user_count)
4951 SilcClientID *client_id;
4952 SilcClientEntry client;
4953 SilcIDCacheEntry cache;
4954 SilcChannelClientEntry chl;
4956 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4957 channel->channel_name));
4959 for (i = 0; i < user_count; i++) {
4961 SILC_GET16_MSB(idp_len, user_list->data + 2);
4963 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4964 silc_buffer_pull(user_list, idp_len);
4969 SILC_GET32_MSB(mode, mode_list->data);
4970 silc_buffer_pull(mode_list, 4);
4972 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4973 silc_free(client_id);
4979 /* Check if we have this client cached already. */
4980 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4981 server->server_type, &cache);
4983 client = silc_idlist_find_client_by_id(server->global_list,
4984 client_id, server->server_type,
4987 /* If router did not find such Client ID in its lists then this must
4988 be bogus client or some router in the net is buggy. */
4989 if (server->server_type != SILC_SERVER) {
4990 silc_free(client_id);
4994 /* We don't have that client anywhere, add it. The client is added
4995 to global list since server didn't have it in the lists so it must be
4997 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4998 silc_id_dup(client_id, SILC_ID_CLIENT),
4999 sock->user_data, NULL, 0);
5001 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5002 silc_free(client_id);
5006 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5011 silc_free(client_id);
5013 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5014 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5015 "%s", channel->channel_name));
5019 if (!silc_server_client_on_channel(client, channel, &chl)) {
5020 /* Client was not on the channel, add it. */
5021 chl = silc_calloc(1, sizeof(*chl));
5022 chl->client = client;
5024 chl->channel = channel;
5025 silc_hash_table_add(channel->user_list, chl->client, chl);
5026 silc_hash_table_add(client->channels, chl->channel, chl);
5027 channel->user_count++;
5035 /* Saves channels and channels user modes to the `client'. Removes
5036 the client from those channels that are not sent in the list but
5039 void silc_server_save_user_channels(SilcServer server,
5040 SilcSocketConnection sock,
5041 SilcClientEntry client,
5042 SilcBuffer channels,
5043 SilcBuffer channels_user_modes)
5046 SilcUInt32 *chumodes;
5047 SilcChannelPayload entry;
5048 SilcChannelEntry channel;
5049 SilcChannelID *channel_id;
5050 SilcChannelClientEntry chl;
5051 SilcHashTable ht = NULL;
5052 SilcHashTableList htl;
5056 if (!channels || !channels_user_modes ||
5057 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5060 ch = silc_channel_payload_parse_list(channels->data, channels->len);
5061 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5063 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5064 NULL, NULL, NULL, TRUE);
5065 silc_dlist_start(ch);
5066 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5067 /* Check if we have this channel, and add it if we don't have it.
5068 Also add the client on the channel unless it is there already. */
5069 channel_id = silc_channel_get_id_parse(entry);
5070 channel = silc_idlist_find_channel_by_id(server->local_list,
5073 channel = silc_idlist_find_channel_by_id(server->global_list,
5076 if (server->server_type != SILC_SERVER) {
5077 silc_free(channel_id);
5082 /* We don't have that channel anywhere, add it. */
5083 name = silc_channel_get_name(entry, NULL);
5084 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5085 channel_id, server->router,
5088 silc_free(channel_id);
5095 channel->mode = silc_channel_get_mode(entry);
5097 /* Add the client on the channel */
5098 if (!silc_server_client_on_channel(client, channel, &chl)) {
5099 chl = silc_calloc(1, sizeof(*chl));
5100 chl->client = client;
5101 chl->mode = chumodes[i++];
5102 chl->channel = channel;
5103 silc_hash_table_add(channel->user_list, chl->client, chl);
5104 silc_hash_table_add(client->channels, chl->channel, chl);
5105 channel->user_count++;
5108 chl->mode = chumodes[i++];
5111 silc_hash_table_add(ht, channel, channel);
5112 silc_free(channel_id);
5114 silc_channel_payload_list_free(ch);
5115 silc_free(chumodes);
5119 /* Go through the list again and remove client from channels that
5120 are no part of the list. */
5122 silc_hash_table_list(client->channels, &htl);
5123 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
5124 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5125 silc_hash_table_del(chl->channel->user_list, chl->client);
5126 silc_hash_table_del(chl->client->channels, chl->channel);
5130 silc_hash_table_list_reset(&htl);
5131 silc_hash_table_free(ht);
5133 silc_hash_table_list(client->channels, &htl);
5134 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
5135 silc_hash_table_del(chl->channel->user_list, chl->client);
5136 silc_hash_table_del(chl->client->channels, chl->channel);
5139 silc_hash_table_list_reset(&htl);
5143 /* Lookups route to the client indicated by the `id_data'. The connection
5144 object and internal data object is returned. Returns NULL if route
5145 could not be found to the client. If the `client_id' is specified then
5146 it is used and the `id_data' is ignored. */
5148 SilcSocketConnection
5149 silc_server_get_client_route(SilcServer server,
5150 unsigned char *id_data,
5152 SilcClientID *client_id,
5153 SilcIDListData *idata,
5154 SilcClientEntry *client_entry)
5157 SilcClientEntry client;
5159 SILC_LOG_DEBUG(("Start"));
5162 *client_entry = NULL;
5164 /* Decode destination Client ID */
5166 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
5168 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
5172 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5175 /* If the destination belongs to our server we don't have to route
5176 the packet anywhere but to send it to the local destination. */
5177 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5181 /* If we are router and the client has router then the client is in
5182 our cell but not directly connected to us. */
5183 if (server->server_type == SILC_ROUTER && client->router) {
5184 /* We are of course in this case the client's router thus the route
5185 to the client is the server who owns the client. So, we will send
5186 the packet to that server. */
5188 *idata = (SilcIDListData)client->router;
5189 return client->router->connection;
5192 /* Seems that client really is directly connected to us */
5194 *idata = (SilcIDListData)client;
5196 *client_entry = client;
5197 return client->connection;
5200 /* Destination belongs to someone not in this server. If we are normal
5201 server our action is to send the packet to our router. */
5202 if (server->server_type != SILC_ROUTER && !server->standalone) {
5205 *idata = (SilcIDListData)server->router;
5206 return SILC_PRIMARY_ROUTE(server);
5209 /* We are router and we will perform route lookup for the destination
5210 and send the packet to fastest route. */
5211 if (server->server_type == SILC_ROUTER && !server->standalone) {
5212 /* Check first that the ID is valid */
5213 client = silc_idlist_find_client_by_id(server->global_list, id,
5216 SilcSocketConnection dst_sock;
5218 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5222 *idata = (SilcIDListData)dst_sock->user_data;
5231 /* Encodes and returns channel list of channels the `client' has joined.
5232 Secret channels are not put to the list. */
5234 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5235 SilcClientEntry client,
5238 SilcBuffer *user_mode_list)
5240 SilcBuffer buffer = NULL;
5241 SilcChannelEntry channel;
5242 SilcChannelClientEntry chl;
5243 SilcHashTableList htl;
5246 SilcUInt16 name_len;
5250 *user_mode_list = NULL;
5252 silc_hash_table_list(client->channels, &htl);
5253 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5254 channel = chl->channel;
5256 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5258 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5261 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
5262 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
5263 name_len = strlen(channel->channel_name);
5265 len = 4 + name_len + id_len + 4;
5266 buffer = silc_buffer_realloc(buffer,
5267 (buffer ? buffer->truelen + len : len));
5268 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5269 silc_buffer_format(buffer,
5270 SILC_STR_UI_SHORT(name_len),
5271 SILC_STR_UI_XNSTRING(channel->channel_name,
5273 SILC_STR_UI_SHORT(id_len),
5274 SILC_STR_UI_XNSTRING(cid, id_len),
5275 SILC_STR_UI_INT(chl->channel->mode),
5277 silc_buffer_pull(buffer, len);
5280 if (user_mode_list) {
5281 *user_mode_list = silc_buffer_realloc(*user_mode_list,
5283 (*user_mode_list)->truelen + 4 :
5285 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5286 (*user_mode_list)->data));
5287 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5288 silc_buffer_pull(*user_mode_list, 4);
5291 silc_hash_table_list_reset(&htl);
5294 silc_buffer_push(buffer, buffer->data - buffer->head);
5295 if (user_mode_list && *user_mode_list)
5296 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5297 (*user_mode_list)->head));
5302 /* A timeout callback for the re-key. We will be the initiator of the
5305 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5307 SilcServer server = app_context;
5308 SilcSocketConnection sock = (SilcSocketConnection)context;
5309 SilcIDListData idata = (SilcIDListData)sock->user_data;
5310 SilcProtocol protocol;
5311 SilcServerRekeyInternalContext *proto_ctx;
5313 /* If rekey protocol is active already wait for it to finish */
5314 if (sock->protocol && sock->protocol->protocol &&
5315 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)
5318 /* If any other protocol is active do not start this protocol yet. */
5319 if (sock->protocol) {
5320 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
5321 silc_schedule_task_add(server->schedule, sock->sock,
5322 silc_server_rekey_callback,
5323 sock, 60, 0, SILC_TASK_TIMEOUT,
5324 SILC_TASK_PRI_NORMAL);
5328 SILC_LOG_DEBUG(("Executing rekey protocol"));
5330 /* Allocate internal protocol context. This is sent as context
5332 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5333 proto_ctx->server = (void *)server;
5334 proto_ctx->sock = sock;
5335 proto_ctx->responder = FALSE;
5336 proto_ctx->pfs = idata->rekey->pfs;
5338 /* Perform rekey protocol. Will call the final callback after the
5339 protocol is over. */
5340 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5341 &protocol, proto_ctx, silc_server_rekey_final);
5342 sock->protocol = protocol;
5344 /* Run the protocol */
5345 silc_protocol_execute(protocol, server->schedule, 0, 0);
5348 /* The final callback for the REKEY protocol. This will actually take the
5349 new key material into use. */
5351 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5353 SilcProtocol protocol = (SilcProtocol)context;
5354 SilcServerRekeyInternalContext *ctx =
5355 (SilcServerRekeyInternalContext *)protocol->context;
5356 SilcServer server = (SilcServer)ctx->server;
5357 SilcSocketConnection sock = ctx->sock;
5358 SilcIDListData idata = (SilcIDListData)sock->user_data;
5360 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5361 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5362 /* Error occured during protocol */
5363 SILC_LOG_ERROR(("Error occurred during rekey protocol with "
5364 "%s (%s)", sock->hostname, sock->ip));
5365 silc_protocol_cancel(protocol, server->schedule);
5366 silc_protocol_free(protocol);
5367 sock->protocol = NULL;
5369 silc_packet_context_free(ctx->packet);
5371 silc_ske_free(ctx->ske);
5373 silc_server_disconnect_remote(server, sock,
5374 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
5377 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
5378 silc_server_create_connections(server);
5382 SILC_LOG_DEBUG(("Rekey protocol completed"));
5384 /* Purge the outgoing data queue to assure that all rekey packets really
5385 go to the network before we quit the protocol. */
5386 silc_server_packet_queue_purge(server, sock);
5388 /* Re-register re-key timeout */
5389 if (ctx->responder == FALSE)
5390 silc_schedule_task_add(server->schedule, sock->sock,
5391 silc_server_rekey_callback,
5392 sock, idata->rekey->timeout, 0,
5393 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5396 silc_protocol_free(protocol);
5397 sock->protocol = NULL;
5399 silc_packet_context_free(ctx->packet);
5401 silc_ske_free(ctx->ske);
5405 /* Task callback used to retrieve network statistical information from
5406 router server once in a while. */
5408 SILC_TASK_CALLBACK(silc_server_get_stats)
5410 SilcServer server = (SilcServer)context;
5411 SilcBuffer idp, packet;
5413 if (!server->standalone) {
5414 SILC_LOG_DEBUG(("Retrieving stats from router"));
5415 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5416 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5417 ++server->cmd_ident, 1,
5418 1, idp->data, idp->len);
5419 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5420 SILC_PACKET_COMMAND, 0, packet->data,
5421 packet->len, FALSE);
5422 silc_buffer_free(packet);
5423 silc_buffer_free(idp);
5426 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5427 server, 120, 0, SILC_TASK_TIMEOUT,