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;
1444 server->backup_primary = FALSE;
1446 /* Announce data if we are not backup router (unless not as primary
1447 currently). Backup router announces later at the end of
1448 resuming protocol. */
1449 if (server->backup_router && server->server_type == SILC_ROUTER) {
1450 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1452 /* If we are router then announce our possible servers. Backup
1453 router announces also global servers. */
1454 if (server->server_type == SILC_ROUTER)
1455 silc_server_announce_servers(server,
1456 server->backup_router ? TRUE : FALSE,
1457 0, SILC_PRIMARY_ROUTE(server));
1459 /* Announce our clients and channels to the router */
1460 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1461 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1464 /* If we are backup router then this primary router is whom we are
1466 if (server->server_type == SILC_BACKUP_ROUTER)
1467 silc_server_backup_add(server, server->id_entry, sock->ip,
1468 sconn->remote_port, TRUE);
1471 /* Add this server to be our backup router */
1472 id_entry->server_type = SILC_BACKUP_ROUTER;
1473 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1474 sconn->backup_replace_port, FALSE);
1477 sock->protocol = NULL;
1480 /* Call the completion callback to indicate that we've connected to
1482 if (sconn && sconn->callback)
1483 (*sconn->callback)(server, id_entry, sconn->callback_context);
1485 /* Free the temporary connection data context */
1487 silc_server_config_unref(&sconn->conn);
1488 silc_free(sconn->remote_host);
1489 silc_free(sconn->backup_replace_ip);
1492 if (sconn == server->router_conn)
1493 server->router_conn = NULL;
1496 /* Free the protocol object */
1497 if (sock->protocol == protocol)
1498 sock->protocol = NULL;
1499 silc_protocol_free(protocol);
1501 silc_packet_context_free(ctx->packet);
1503 silc_ske_free(ctx->ske);
1504 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1505 silc_free(ctx->auth_data);
1509 /* Host lookup callback that is called after the incoming connection's
1510 IP and FQDN lookup is performed. This will actually check the acceptance
1511 of the incoming connection and will register the key exchange protocol
1512 for this connection. */
1515 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1518 SilcServerKEInternalContext *proto_ctx =
1519 (SilcServerKEInternalContext *)context;
1520 SilcServer server = (SilcServer)proto_ctx->server;
1521 SilcServerConfigClient *cconfig = NULL;
1522 SilcServerConfigServer *sconfig = NULL;
1523 SilcServerConfigRouter *rconfig = NULL;
1524 SilcServerConfigDeny *deny;
1527 /* Check whether we could resolve both IP and FQDN. */
1528 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1529 server->config->require_reverse_lookup)) {
1530 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1531 sock->hostname ? sock->hostname :
1532 sock->ip ? sock->ip : ""));
1533 server->stat.conn_failures++;
1534 silc_server_disconnect_remote(server, sock,
1535 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1536 "Unknown host or IP");
1537 silc_free(proto_ctx);
1541 /* Register the connection for network input and output. This sets
1542 that scheduler will listen for incoming packets for this connection
1543 and sets that outgoing packets may be sent to this connection as well.
1544 However, this doesn't set the scheduler for outgoing traffic, it
1545 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1546 later when outgoing data is available. */
1547 context = (void *)server;
1548 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1550 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1553 /* Listenning port */
1554 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1555 silc_server_disconnect_remote(server, sock,
1556 SILC_STATUS_ERR_RESOURCE_LIMIT,
1557 "Connection refused");
1558 server->stat.conn_failures++;
1559 silc_free(proto_ctx);
1562 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1564 /* Check whether this connection is denied to connect to us. */
1565 deny = silc_server_config_find_denied(server, sock->ip);
1567 deny = silc_server_config_find_denied(server, sock->hostname);
1569 /* The connection is denied */
1570 SILC_LOG_INFO(("Connection %s (%s) is denied",
1571 sock->hostname, sock->ip));
1572 silc_server_disconnect_remote(server, sock,
1573 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1575 server->stat.conn_failures++;
1576 silc_free(proto_ctx);
1580 /* Check whether we have configured this sort of connection at all. We
1581 have to check all configurations since we don't know what type of
1582 connection this is. */
1583 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1584 cconfig = silc_server_config_find_client(server, sock->hostname);
1585 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1586 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1587 if (server->server_type == SILC_ROUTER) {
1588 if (!(rconfig = silc_server_config_find_router_conn(server,
1589 sock->ip, sock->port)))
1590 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1593 if (!cconfig && !sconfig && !rconfig) {
1594 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1596 silc_server_disconnect_remote(server, sock,
1597 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1598 server->stat.conn_failures++;
1599 silc_free(proto_ctx);
1603 /* The connection is allowed */
1605 /* Set internal context for key exchange protocol. This is
1606 sent as context for the protocol. */
1607 proto_ctx->sock = sock;
1608 proto_ctx->rng = server->rng;
1609 proto_ctx->responder = TRUE;
1610 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1611 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1612 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1614 /* Take flags for key exchange. Since we do not know what type of connection
1615 this is, we go through all found configurations and use the global ones
1616 as well. This will result always into strictest key exchange flags. */
1617 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1618 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1619 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1620 if (server->config->param.key_exchange_pfs)
1621 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1623 /* Prepare the connection for key exchange protocol. We allocate the
1624 protocol but will not start it yet. The connector will be the
1625 initiator of the protocol thus we will wait for initiation from
1626 there before we start the protocol. */
1627 server->stat.auth_attempts++;
1628 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1629 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1630 &sock->protocol, proto_ctx,
1631 silc_server_accept_new_connection_second);
1633 /* Register a timeout task that will be executed if the connector
1634 will not start the key exchange protocol within specified timeout
1635 and the connection will be closed. */
1636 proto_ctx->timeout_task =
1637 silc_schedule_task_add(server->schedule, sock->sock,
1638 silc_server_timeout_remote,
1640 server->config->key_exchange_timeout, 0,
1645 /* Accepts new connections to the server. Accepting new connections are
1646 done in three parts to make it async. */
1648 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1650 SilcServer server = (SilcServer)context;
1651 SilcSocketConnection newsocket;
1652 SilcServerKEInternalContext *proto_ctx;
1655 SILC_LOG_DEBUG(("Accepting new connection"));
1657 server->stat.conn_attempts++;
1659 sock = silc_net_accept_connection(fd);
1661 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1662 server->stat.conn_failures++;
1666 /* Check for maximum allowed connections */
1667 if (sock > server->config->param.connections_max) {
1668 SILC_LOG_ERROR(("Refusing connection, server is full"));
1669 server->stat.conn_failures++;
1670 silc_net_close_connection(sock);
1674 /* Set socket options */
1675 silc_net_set_socket_nonblock(sock);
1676 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1678 /* We don't create a ID yet, since we don't know what type of connection
1679 this is yet. But, we do add the connection to the socket table. */
1680 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1681 server->sockets[sock] = newsocket;
1683 /* Perform asynchronous host lookup. This will lookup the IP and the
1684 FQDN of the remote connection. After the lookup is done the connection
1685 is accepted further. */
1686 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1687 proto_ctx->server = server;
1688 proto_ctx->context = (void *)fd;
1689 silc_socket_host_lookup(newsocket, TRUE,
1690 silc_server_accept_new_connection_lookup,
1691 (void *)proto_ctx, server->schedule);
1694 /* Second part of accepting new connection. Key exchange protocol has been
1695 performed and now it is time to do little connection authentication
1696 protocol to figure out whether this connection is client or server
1697 and whether it has right to access this server (especially server
1698 connections needs to be authenticated). */
1700 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1702 SilcProtocol protocol = (SilcProtocol)context;
1703 SilcServerKEInternalContext *ctx =
1704 (SilcServerKEInternalContext *)protocol->context;
1705 SilcServer server = (SilcServer)ctx->server;
1706 SilcSocketConnection sock = ctx->sock;
1707 SilcServerConnAuthInternalContext *proto_ctx;
1709 SILC_LOG_DEBUG(("Start"));
1711 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1712 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1713 /* Error occured during protocol */
1714 SILC_LOG_DEBUG(("Error in key exchange protocol"));
1715 silc_protocol_free(protocol);
1716 sock->protocol = NULL;
1717 silc_ske_free_key_material(ctx->keymat);
1719 silc_packet_context_free(ctx->packet);
1721 silc_ske_free(ctx->ske);
1722 silc_free(ctx->dest_id);
1723 silc_server_config_unref(&ctx->cconfig);
1724 silc_server_config_unref(&ctx->sconfig);
1725 silc_server_config_unref(&ctx->rconfig);
1728 if (!SILC_IS_DISCONNECTING(sock)) {
1729 SILC_LOG_INFO(("Key exchange failed for %s:%d [%s]", sock->hostname,
1731 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1732 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1733 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1735 silc_server_disconnect_remote(server, sock,
1736 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1740 server->stat.auth_failures++;
1744 /* We now have the key material as the result of the key exchange
1745 protocol. Take the key material into use. Free the raw key material
1746 as soon as we've set them into use. */
1747 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1748 ctx->sock, ctx->keymat,
1749 ctx->ske->prop->cipher,
1750 ctx->ske->prop->pkcs,
1751 ctx->ske->prop->hash,
1752 ctx->ske->prop->hmac,
1753 ctx->ske->prop->group,
1755 SILC_LOG_ERROR(("Error setting key material in use"));
1756 silc_protocol_free(protocol);
1757 sock->protocol = NULL;
1758 silc_ske_free_key_material(ctx->keymat);
1760 silc_packet_context_free(ctx->packet);
1762 silc_ske_free(ctx->ske);
1763 silc_free(ctx->dest_id);
1764 silc_server_config_unref(&ctx->cconfig);
1765 silc_server_config_unref(&ctx->sconfig);
1766 silc_server_config_unref(&ctx->rconfig);
1768 silc_server_disconnect_remote(server, sock,
1769 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1770 server->stat.auth_failures++;
1773 silc_ske_free_key_material(ctx->keymat);
1775 /* Allocate internal context for the authentication protocol. This
1776 is sent as context for the protocol. */
1777 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1778 proto_ctx->server = (void *)server;
1779 proto_ctx->sock = sock;
1780 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1781 proto_ctx->responder = TRUE;
1782 proto_ctx->dest_id_type = ctx->dest_id_type;
1783 proto_ctx->dest_id = ctx->dest_id;
1784 proto_ctx->cconfig = ctx->cconfig;
1785 proto_ctx->sconfig = ctx->sconfig;
1786 proto_ctx->rconfig = ctx->rconfig;
1788 /* Free old protocol as it is finished now */
1789 silc_protocol_free(protocol);
1791 silc_packet_context_free(ctx->packet);
1793 sock->protocol = NULL;
1795 /* Allocate the authentication protocol. This is allocated here
1796 but we won't start it yet. We will be receiving party of this
1797 protocol thus we will wait that connecting party will make
1798 their first move. */
1799 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1800 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1801 &sock->protocol, proto_ctx,
1802 silc_server_accept_new_connection_final);
1804 /* Register timeout task. If the protocol is not executed inside
1805 this timelimit the connection will be terminated. */
1806 proto_ctx->timeout_task =
1807 silc_schedule_task_add(server->schedule, sock->sock,
1808 silc_server_timeout_remote,
1810 server->config->conn_auth_timeout, 0,
1815 /* After this is called, server don't wait for backup router anymore.
1816 This gets called automatically even after we have backup router
1817 connection established. */
1819 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1821 SilcServer server = context;
1822 server->wait_backup = FALSE;
1825 /* Final part of accepting new connection. The connection has now
1826 been authenticated and keys has been exchanged. We also know whether
1827 this is client or server connection. */
1829 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1831 SilcProtocol protocol = (SilcProtocol)context;
1832 SilcServerConnAuthInternalContext *ctx =
1833 (SilcServerConnAuthInternalContext *)protocol->context;
1834 SilcServer server = (SilcServer)ctx->server;
1835 SilcSocketConnection sock = ctx->sock;
1836 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1838 SilcServerConfigConnParams *param = &server->config->param;
1840 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1841 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1842 /* Error occured during protocol */
1843 SILC_LOG_DEBUG(("Error during authentication protocol"));
1844 silc_protocol_free(protocol);
1845 sock->protocol = NULL;
1847 silc_packet_context_free(ctx->packet);
1849 silc_ske_free(ctx->ske);
1850 silc_free(ctx->dest_id);
1851 silc_server_config_unref(&ctx->cconfig);
1852 silc_server_config_unref(&ctx->sconfig);
1853 silc_server_config_unref(&ctx->rconfig);
1856 if (!SILC_IS_DISCONNECTING(sock)) {
1857 SILC_LOG_INFO(("Authentication failed for %s:%d [%s]", sock->hostname,
1859 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1860 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1861 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1863 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1866 server->stat.auth_failures++;
1870 entry->data.last_receive = time(NULL);
1872 switch (ctx->conn_type) {
1873 case SILC_SOCKET_TYPE_CLIENT:
1875 SilcClientEntry client;
1876 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1878 /* Verify whether this connection is after all allowed to connect */
1879 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1880 &server->config->param,
1881 conn->param, ctx->ske)) {
1882 server->stat.auth_failures++;
1886 /* If we are primary router and we have backup router configured
1887 but it has not connected to use yet, do not accept any other
1889 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1890 !server->backup_router) {
1891 SilcServerConfigRouter *router;
1892 router = silc_server_config_get_backup_router(server);
1893 if (router && strcmp(server->config->server_info->primary->server_ip,
1895 silc_server_find_socket_by_host(server,
1896 SILC_SOCKET_TYPE_SERVER,
1897 router->backup_replace_ip, 0)) {
1898 SILC_LOG_INFO(("Will not accept connections because we do "
1899 "not have backup router connection established"));
1900 sock->protocol = NULL;
1901 silc_server_disconnect_remote(server, sock,
1902 SILC_STATUS_ERR_PERM_DENIED,
1903 "We do not have connection to backup "
1904 "router established, try later");
1905 silc_free(sock->user_data);
1906 server->stat.auth_failures++;
1908 /* From here on, wait 10 seconds for the backup router to appear. */
1909 silc_schedule_task_add(server->schedule, 0,
1910 silc_server_backup_router_wait,
1911 (void *)server, 10, 0,
1912 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1917 SILC_LOG_DEBUG(("Remote host is client"));
1918 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1921 /* Add the client to the client ID cache. The nickname and Client ID
1922 and other information is created after we have received NEW_CLIENT
1923 packet from client. */
1924 client = silc_idlist_add_client(server->local_list,
1925 NULL, NULL, NULL, NULL, NULL, sock, 0);
1927 SILC_LOG_ERROR(("Could not add new client to cache"));
1928 silc_free(sock->user_data);
1929 sock->protocol = NULL;
1930 silc_server_disconnect_remote(server, sock,
1931 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1932 server->stat.auth_failures++;
1935 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1938 server->stat.my_clients++;
1939 server->stat.clients++;
1940 server->stat.cell_clients++;
1942 /* Get connection parameters */
1944 param = conn->param;
1946 if (!param->keepalive_secs)
1947 param->keepalive_secs = server->config->param.keepalive_secs;
1949 if (!param->qos && server->config->param.qos) {
1950 param->qos = server->config->param.qos;
1951 param->qos_rate_limit = server->config->param.qos_rate_limit;
1952 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1953 param->qos_limit_sec = server->config->param.qos_limit_sec;
1954 param->qos_limit_usec = server->config->param.qos_limit_usec;
1957 /* Check if to be anonymous connection */
1958 if (param->anonymous)
1959 client->mode |= SILC_UMODE_ANONYMOUS;
1962 id_entry = (void *)client;
1965 case SILC_SOCKET_TYPE_SERVER:
1966 case SILC_SOCKET_TYPE_ROUTER:
1968 SilcServerEntry new_server;
1969 bool initiator = FALSE;
1970 bool backup_local = FALSE;
1971 bool backup_router = FALSE;
1972 char *backup_replace_ip = NULL;
1973 SilcUInt16 backup_replace_port = 0;
1974 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1975 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1977 /* If we are backup router and this is incoming server connection
1978 and we do not have connection to primary router, do not allow
1980 if (server->server_type == SILC_BACKUP_ROUTER &&
1981 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1982 !SILC_PRIMARY_ROUTE(server)) {
1983 SILC_LOG_INFO(("Will not accept server connection because we do "
1984 "not have primary router connection established"));
1985 sock->protocol = NULL;
1986 silc_server_disconnect_remote(server, sock,
1987 SILC_STATUS_ERR_PERM_DENIED,
1988 "We do not have connection to primary "
1989 "router established, try later");
1990 silc_free(sock->user_data);
1991 server->stat.auth_failures++;
1995 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1996 /* Verify whether this connection is after all allowed to connect */
1997 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1998 &server->config->param,
1999 rconn ? rconn->param : NULL,
2001 silc_free(sock->user_data);
2002 server->stat.auth_failures++;
2008 param = rconn->param;
2010 if (!param->keepalive_secs)
2011 param->keepalive_secs = server->config->param.keepalive_secs;
2013 if (!param->qos && server->config->param.qos) {
2014 param->qos = server->config->param.qos;
2015 param->qos_rate_limit = server->config->param.qos_rate_limit;
2016 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2017 param->qos_limit_sec = server->config->param.qos_limit_sec;
2018 param->qos_limit_usec = server->config->param.qos_limit_usec;
2022 initiator = rconn->initiator;
2023 backup_local = rconn->backup_local;
2024 backup_router = rconn->backup_router;
2025 backup_replace_ip = rconn->backup_replace_ip;
2026 backup_replace_port = rconn->backup_replace_port;
2030 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2031 /* Verify whether this connection is after all allowed to connect */
2032 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
2033 &server->config->param,
2034 sconn ? sconn->param : NULL,
2036 silc_free(sock->user_data);
2037 server->stat.auth_failures++;
2042 param = sconn->param;
2044 if (!param->keepalive_secs)
2045 param->keepalive_secs = server->config->param.keepalive_secs;
2047 if (!param->qos && server->config->param.qos) {
2048 param->qos = server->config->param.qos;
2049 param->qos_rate_limit = server->config->param.qos_rate_limit;
2050 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2051 param->qos_limit_sec = server->config->param.qos_limit_sec;
2052 param->qos_limit_usec = server->config->param.qos_limit_usec;
2056 backup_router = sconn->backup_router;
2060 /* If we are primary router and we have backup router configured
2061 but it has not connected to use yet, do not accept any other
2063 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2064 !server->backup_router && !backup_router) {
2065 SilcServerConfigRouter *router;
2066 router = silc_server_config_get_backup_router(server);
2067 if (router && strcmp(server->config->server_info->primary->server_ip,
2069 silc_server_find_socket_by_host(server,
2070 SILC_SOCKET_TYPE_SERVER,
2071 router->backup_replace_ip, 0)) {
2072 SILC_LOG_INFO(("Will not accept connections because we do "
2073 "not have backup router connection established"));
2074 sock->protocol = NULL;
2075 silc_server_disconnect_remote(server, sock,
2076 SILC_STATUS_ERR_PERM_DENIED,
2077 "We do not have connection to backup "
2078 "router established, try later");
2079 silc_free(sock->user_data);
2080 server->stat.auth_failures++;
2082 /* From here on, wait 10 seconds for the backup router to appear. */
2083 silc_schedule_task_add(server->schedule, 0,
2084 silc_server_backup_router_wait,
2085 (void *)server, 10, 0,
2086 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2091 SILC_LOG_DEBUG(("Remote host is %s",
2092 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2093 "server" : (backup_router ?
2094 "backup router" : "router")));
2095 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2096 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2097 "server" : (backup_router ?
2098 "backup router" : "router")));
2100 /* Add the server into server cache. The server name and Server ID
2101 is updated after we have received NEW_SERVER packet from the
2102 server. We mark ourselves as router for this server if we really
2105 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2106 server->local_list : (backup_router ?
2107 server->local_list :
2108 server->global_list)),
2110 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2111 SILC_SERVER : SILC_ROUTER),
2113 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2114 server->id_entry : (backup_router ?
2115 server->id_entry : NULL)),
2118 SILC_LOG_ERROR(("Could not add new server to cache"));
2119 silc_free(sock->user_data);
2120 sock->protocol = NULL;
2121 silc_server_disconnect_remote(server, sock,
2122 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2123 server->stat.auth_failures++;
2126 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2128 id_entry = (void *)new_server;
2130 /* If the incoming connection is router and marked as backup router
2131 then add it to be one of our backups */
2132 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2133 /* Change it back to SERVER type since that's what it really is. */
2135 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2136 new_server->server_type = SILC_BACKUP_ROUTER;
2138 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2139 ("Backup router %s is now online",
2142 /* Remove the backup waiting with timeout */
2143 silc_schedule_task_add(server->schedule, 0,
2144 silc_server_backup_router_wait,
2145 (void *)server, 5, 0,
2146 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2150 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2151 server->stat.my_servers++;
2153 server->stat.my_routers++;
2154 server->stat.routers++;
2156 server->stat.servers++;
2158 /* Check whether this connection is to be our primary router connection
2159 if we do not already have the primary route. */
2160 if (!backup_router &&
2161 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2162 if (silc_server_config_is_primary_route(server) && !initiator)
2165 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2166 server->standalone = FALSE;
2167 if (!server->id_entry->router) {
2168 server->id_entry->router = id_entry;
2169 server->router = id_entry;
2180 sock->type = ctx->conn_type;
2182 /* Add the common data structure to the ID entry. */
2183 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2185 /* Add to sockets internal pointer for fast referencing */
2186 silc_free(sock->user_data);
2187 sock->user_data = id_entry;
2189 /* Connection has been fully established now. Everything is ok. */
2190 SILC_LOG_DEBUG(("New connection authenticated"));
2192 /* Perform keepalive. */
2193 if (param->keepalive_secs)
2194 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2195 silc_server_perform_heartbeat,
2198 /* Perform Quality of Service */
2200 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2201 param->qos_limit_sec, param->qos_limit_usec,
2205 if (sock->protocol == protocol)
2206 silc_protocol_free(protocol);
2208 silc_packet_context_free(ctx->packet);
2210 silc_ske_free(ctx->ske);
2211 silc_free(ctx->dest_id);
2212 silc_server_config_unref(&ctx->cconfig);
2213 silc_server_config_unref(&ctx->sconfig);
2214 silc_server_config_unref(&ctx->rconfig);
2216 sock->protocol = NULL;
2219 /* This function is used to read packets from network and send packets to
2220 network. This is usually a generic task. */
2222 SILC_TASK_CALLBACK(silc_server_packet_process)
2224 SilcServer server = (SilcServer)context;
2225 SilcSocketConnection sock = server->sockets[fd];
2226 SilcIDListData idata;
2227 SilcCipher cipher = NULL;
2228 SilcHmac hmac = NULL;
2229 SilcUInt32 sequence = 0;
2230 bool local_is_router;
2234 SILC_LOG_DEBUG(("Unknown socket connection"));
2238 /* Packet sending */
2240 if (type == SILC_TASK_WRITE) {
2241 /* Do not send data to disconnected connection */
2242 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2243 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2247 server->stat.packets_sent++;
2249 /* Send the packet */
2250 ret = silc_packet_send(sock, TRUE);
2252 /* If returned -2 could not write to connection now, will do
2257 /* The packet has been sent and now it is time to set the connection
2258 back to only for input. When there is again some outgoing data
2259 available for this connection it will be set for output as well.
2260 This call clears the output setting and sets it only for input. */
2261 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2262 SILC_UNSET_OUTBUF_PENDING(sock);
2263 silc_buffer_clear(sock->outbuf);
2266 SILC_LOG_ERROR(("Error sending packet to connection "
2267 "%s:%d [%s]", sock->hostname, sock->port,
2268 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2269 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2270 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2273 if (sock->user_data)
2274 silc_server_free_sock_user_data(server, sock, NULL);
2275 SILC_SET_DISCONNECTING(sock);
2276 silc_server_close_connection(server, sock);
2281 /* Packet receiving */
2283 /* Read some data from connection */
2284 ret = silc_packet_receive(sock);
2288 SILC_LOG_ERROR(("Error receiving packet from connection "
2289 "%s:%d [%s] %s", sock->hostname, sock->port,
2290 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2291 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2292 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2293 "Router"), strerror(errno)));
2295 if (sock->user_data)
2296 silc_server_free_sock_user_data(server, sock, NULL);
2297 SILC_SET_DISCONNECTING(sock);
2298 silc_server_close_connection(server, sock);
2305 SILC_LOG_DEBUG(("Read EOF"));
2307 /* If connection is disconnecting already we will finally
2308 close the connection */
2309 if (SILC_IS_DISCONNECTING(sock)) {
2310 if (sock->user_data)
2311 silc_server_free_sock_user_data(server, sock, NULL);
2312 silc_server_close_connection(server, sock);
2316 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2318 if (sock->user_data) {
2321 /* If backup disconnected then mark that resuming willl not be allowed */
2322 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2323 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2324 SilcServerEntry server_entry = sock->user_data;
2325 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2326 server->backup_closed = TRUE;
2329 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2330 silc_server_free_sock_user_data(server, sock, tmp);
2332 silc_server_free_sock_user_data(server, sock, NULL);
2333 } else if (server->router_conn && server->router_conn->sock == sock &&
2334 !server->router && server->standalone) {
2335 silc_server_create_connections(server);
2338 SILC_SET_DISCONNECTING(sock);
2339 silc_server_close_connection(server, sock);
2343 /* If connection is disconnecting or disconnected we will ignore
2345 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2346 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2350 /* Get keys and stuff from ID entry */
2351 idata = (SilcIDListData)sock->user_data;
2353 cipher = idata->receive_key;
2354 hmac = idata->hmac_receive;
2355 sequence = idata->psn_receive;
2358 /* Then, process the packet. This will call the parser that will then
2359 decrypt and parse the packet. */
2361 local_is_router = (server->server_type == SILC_ROUTER);
2363 /* If socket connection is our primary, we are backup and we are doing
2364 backup resuming, we won't process the packet as being a router
2365 (affects channel message decryption). */
2366 if (server->backup_router && SILC_SERVER_IS_BACKUP(sock) &&
2367 SILC_PRIMARY_ROUTE(server) == sock)
2368 local_is_router = FALSE;
2370 ret = silc_packet_receive_process(sock, local_is_router,
2371 cipher, hmac, sequence,
2372 silc_server_packet_parse, server);
2374 /* If processing failed the connection is closed. */
2376 /* On packet processing errors we may close our primary router
2377 connection but won't become primary router if we are the backup
2378 since this is local error condition. */
2379 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2380 server->backup_noswitch = TRUE;
2382 if (sock->user_data)
2383 silc_server_free_sock_user_data(server, sock, NULL);
2384 SILC_SET_DISCONNECTING(sock);
2385 silc_server_close_connection(server, sock);
2389 /* Parses whole packet, received earlier. */
2391 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2393 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2394 SilcServer server = (SilcServer)parse_ctx->context;
2395 SilcSocketConnection sock = parse_ctx->sock;
2396 SilcPacketContext *packet = parse_ctx->packet;
2397 SilcIDListData idata = (SilcIDListData)sock->user_data;
2400 server->stat.packets_received++;
2402 /* Parse the packet */
2403 if (parse_ctx->normal)
2404 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2406 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2408 /* If entry is disabled ignore what we got. */
2409 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2410 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2411 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2412 SILC_LOG_DEBUG(("Connection is disabled"));
2416 if (ret == SILC_PACKET_NONE) {
2417 SILC_LOG_DEBUG(("Error parsing packet"));
2421 /* Check that the the current client ID is same as in the client's packet. */
2422 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2423 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2424 if (client && client->id && packet->src_id) {
2425 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2426 packet->src_id_type);
2427 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2429 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2436 if (server->server_type == SILC_ROUTER) {
2437 /* Route the packet if it is not destined to us. Other ID types but
2438 server are handled separately after processing them. */
2439 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2440 packet->dst_id_type == SILC_ID_SERVER &&
2441 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2442 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2444 /* Route the packet to fastest route for the destination ID */
2445 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2446 packet->dst_id_type);
2449 silc_server_packet_route(server,
2450 silc_server_route_get(server, id,
2451 packet->dst_id_type),
2458 /* Parse the incoming packet type */
2459 silc_server_packet_parse_type(server, sock, packet);
2461 /* Broadcast packet if it is marked as broadcast packet and it is
2462 originated from router and we are router. */
2463 if (server->server_type == SILC_ROUTER &&
2464 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2465 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2466 /* Broadcast to our primary route */
2467 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2469 /* If we have backup routers then we need to feed all broadcast
2470 data to those servers. */
2471 silc_server_backup_broadcast(server, sock, packet);
2475 silc_packet_context_free(packet);
2476 silc_free(parse_ctx);
2479 /* Parser callback called by silc_packet_receive_process. This merely
2480 registers timeout that will handle the actual parsing when appropriate. */
2482 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2485 SilcServer server = (SilcServer)context;
2486 SilcSocketConnection sock = parser_context->sock;
2487 SilcIDListData idata = (SilcIDListData)sock->user_data;
2491 idata->psn_receive = parser_context->packet->sequence + 1;
2493 /* If protocol for this connection is key exchange or rekey then we'll
2494 process all packets synchronously, since there might be packets in
2495 queue that we are not able to decrypt without first processing the
2496 packets before them. */
2497 if (sock->protocol && sock->protocol->protocol &&
2498 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2499 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2500 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2503 /* Reprocess data since we'll return FALSE here. This is because
2504 the idata->receive_key might have become valid in the last packet
2505 and we want to call this processor with valid cipher. */
2507 ret = silc_packet_receive_process(
2508 sock, server->server_type == SILC_ROUTER,
2510 idata->hmac_receive, idata->psn_receive,
2511 silc_server_packet_parse, server);
2513 ret = silc_packet_receive_process(
2514 sock, server->server_type == SILC_ROUTER,
2516 silc_server_packet_parse, server);
2519 /* On packet processing errors we may close our primary router
2520 connection but won't become primary router if we are the backup
2521 since this is local error condition. */
2522 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2523 server->backup_noswitch = TRUE;
2525 if (sock->user_data)
2526 silc_server_free_sock_user_data(server, sock, NULL);
2527 SILC_SET_DISCONNECTING(sock);
2528 silc_server_close_connection(server, sock);
2534 switch (sock->type) {
2535 case SILC_SOCKET_TYPE_UNKNOWN:
2536 case SILC_SOCKET_TYPE_CLIENT:
2537 /* Parse the packet with timeout */
2538 silc_schedule_task_add(server->schedule, sock->sock,
2539 silc_server_packet_parse_real,
2540 (void *)parser_context, 0, 100000,
2542 SILC_TASK_PRI_NORMAL);
2544 case SILC_SOCKET_TYPE_SERVER:
2545 case SILC_SOCKET_TYPE_ROUTER:
2546 /* Packets from servers are parsed immediately */
2547 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2557 /* Parses the packet type and calls what ever routines the packet type
2558 requires. This is done for all incoming packets. */
2560 void silc_server_packet_parse_type(SilcServer server,
2561 SilcSocketConnection sock,
2562 SilcPacketContext *packet)
2564 SilcPacketType type = packet->type;
2565 SilcIDListData idata = (SilcIDListData)sock->user_data;
2567 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2568 silc_get_packet_name(type), packet->flags));
2570 /* Parse the packet type */
2572 case SILC_PACKET_DISCONNECT:
2575 char *message = NULL;
2577 if (packet->flags & SILC_PACKET_FLAG_LIST)
2579 if (packet->buffer->len < 1)
2582 status = (SilcStatus)packet->buffer->data[0];
2583 if (packet->buffer->len > 1 &&
2584 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2585 message = silc_memdup(packet->buffer->data + 1,
2586 packet->buffer->len - 1);
2588 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2589 sock->ip, sock->hostname,
2590 silc_get_status_message(status), status,
2591 message ? message : ""));
2594 /* Do not switch to backup in case of error */
2595 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
2597 /* If backup disconnected then mark that resuming willl not be allowed */
2598 if (server->server_type == SILC_ROUTER && !server->backup_router &&
2599 sock->type == SILC_SOCKET_TYPE_SERVER && sock->user_data) {
2600 SilcServerEntry server_entry = sock->user_data;
2601 if (server_entry->server_type == SILC_BACKUP_ROUTER)
2602 server->backup_closed = TRUE;
2605 /* Handle the disconnection from our end too */
2606 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2607 silc_server_free_sock_user_data(server, sock, NULL);
2608 SILC_SET_DISCONNECTING(sock);
2609 silc_server_close_connection(server, sock);
2610 server->backup_noswitch = FALSE;
2614 case SILC_PACKET_SUCCESS:
2616 * Success received for something. For now we can have only
2617 * one protocol for connection executing at once hence this
2618 * success message is for whatever protocol is executing currently.
2620 if (packet->flags & SILC_PACKET_FLAG_LIST)
2623 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2626 case SILC_PACKET_FAILURE:
2628 * Failure received for something. For now we can have only
2629 * one protocol for connection executing at once hence this
2630 * failure message is for whatever protocol is executing currently.
2632 if (packet->flags & SILC_PACKET_FLAG_LIST)
2635 /* Check for failure START_USE from backup router */
2636 if (server->server_type == SILC_SERVER &&
2637 server->backup_primary && packet->buffer->len == 4) {
2639 SILC_GET32_MSB(type, packet->buffer->data);
2640 if (type == SILC_SERVER_BACKUP_START_USE) {
2641 /* Attempt to reconnect to primary */
2642 SILC_LOG_DEBUG(("Received failed START_USE from backup %s", sock->ip));
2644 /* Default action is to disconnect from backup and reconnect to
2645 primary. Since this failure can happen during switching to
2646 backup (backup might have not noticed the primary going down yet),
2647 we will wait a while and keep sending START_USE to backup.
2648 Only after that we'll give up. */
2649 if (server->router == sock->user_data &&
2650 (time(0) - server->router_connect) < 30) {
2651 SILC_LOG_DEBUG(("Resending START_USE to backup router"));
2652 silc_server_backup_send_start_use(server, sock, FALSE);
2656 /* If backup is our primary, disconnect now. */
2657 if (server->router == sock->user_data) {
2658 if (sock->user_data)
2659 silc_server_free_sock_user_data(server, sock, NULL);
2660 SILC_SET_DISCONNECTING(sock);
2661 silc_server_close_connection(server, sock);
2665 silc_server_create_connections(server);
2669 /* Execute protocol */
2670 if (sock->protocol) {
2671 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
2672 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2677 case SILC_PACKET_REJECT:
2678 if (packet->flags & SILC_PACKET_FLAG_LIST)
2683 case SILC_PACKET_NOTIFY:
2685 * Received notify packet. Server can receive notify packets from
2686 * router. Server then relays the notify messages to clients if needed.
2688 if (packet->flags & SILC_PACKET_FLAG_LIST)
2689 silc_server_notify_list(server, sock, packet);
2691 silc_server_notify(server, sock, packet);
2697 case SILC_PACKET_CHANNEL_MESSAGE:
2699 * Received channel message. Channel messages are special packets
2700 * (although probably most common ones) thus they are handled
2703 if (packet->flags & SILC_PACKET_FLAG_LIST)
2705 idata->last_receive = time(NULL);
2706 silc_server_channel_message(server, sock, packet);
2709 case SILC_PACKET_CHANNEL_KEY:
2711 * Received key for channel. As channels are created by the router
2712 * the keys are as well. We will distribute the key to all of our
2713 * locally connected clients on the particular channel. Router
2714 * never receives this channel and thus is ignored.
2716 if (packet->flags & SILC_PACKET_FLAG_LIST)
2718 silc_server_channel_key(server, sock, packet);
2724 case SILC_PACKET_COMMAND:
2726 * Recived command. Processes the command request and allocates the
2727 * command context and calls the command.
2729 if (packet->flags & SILC_PACKET_FLAG_LIST)
2731 silc_server_command_process(server, sock, packet);
2734 case SILC_PACKET_COMMAND_REPLY:
2736 * Received command reply packet. Received command reply to command. It
2737 * may be reply to command sent by us or reply to command sent by client
2738 * that we've routed further.
2740 if (packet->flags & SILC_PACKET_FLAG_LIST)
2742 silc_server_command_reply(server, sock, packet);
2746 * Private Message packets
2748 case SILC_PACKET_PRIVATE_MESSAGE:
2750 * Received private message packet. The packet is coming from either
2753 if (packet->flags & SILC_PACKET_FLAG_LIST)
2755 idata->last_receive = time(NULL);
2756 silc_server_private_message(server, sock, packet);
2759 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2761 * Private message key packet.
2763 if (packet->flags & SILC_PACKET_FLAG_LIST)
2765 silc_server_private_message_key(server, sock, packet);
2769 * Key Exchange protocol packets
2771 case SILC_PACKET_KEY_EXCHANGE:
2772 if (packet->flags & SILC_PACKET_FLAG_LIST)
2775 if (sock->protocol && sock->protocol->protocol &&
2776 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2777 SilcServerKEInternalContext *proto_ctx =
2778 (SilcServerKEInternalContext *)sock->protocol->context;
2780 proto_ctx->packet = silc_packet_context_dup(packet);
2782 /* Let the protocol handle the packet */
2783 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2785 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2786 "protocol active (%s:%d [%s]).", sock->hostname,
2788 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2789 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2790 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2795 case SILC_PACKET_KEY_EXCHANGE_1:
2796 if (packet->flags & SILC_PACKET_FLAG_LIST)
2799 if (sock->protocol && sock->protocol->protocol &&
2800 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2801 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2803 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2804 SilcServerRekeyInternalContext *proto_ctx =
2805 (SilcServerRekeyInternalContext *)sock->protocol->context;
2807 if (proto_ctx->packet)
2808 silc_packet_context_free(proto_ctx->packet);
2810 proto_ctx->packet = silc_packet_context_dup(packet);
2812 /* Let the protocol handle the packet */
2813 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2815 SilcServerKEInternalContext *proto_ctx =
2816 (SilcServerKEInternalContext *)sock->protocol->context;
2818 if (proto_ctx->packet)
2819 silc_packet_context_free(proto_ctx->packet);
2821 proto_ctx->packet = silc_packet_context_dup(packet);
2822 proto_ctx->dest_id_type = packet->src_id_type;
2823 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2824 packet->src_id_type);
2825 if (!proto_ctx->dest_id)
2828 /* Let the protocol handle the packet */
2829 silc_protocol_execute(sock->protocol, server->schedule,
2833 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2834 "protocol active (%s:%d [%s]).", sock->hostname,
2836 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2837 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2838 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2843 case SILC_PACKET_KEY_EXCHANGE_2:
2844 if (packet->flags & SILC_PACKET_FLAG_LIST)
2847 if (sock->protocol && sock->protocol->protocol &&
2848 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2849 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2851 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2852 SilcServerRekeyInternalContext *proto_ctx =
2853 (SilcServerRekeyInternalContext *)sock->protocol->context;
2855 if (proto_ctx->packet)
2856 silc_packet_context_free(proto_ctx->packet);
2858 proto_ctx->packet = silc_packet_context_dup(packet);
2860 /* Let the protocol handle the packet */
2861 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2863 SilcServerKEInternalContext *proto_ctx =
2864 (SilcServerKEInternalContext *)sock->protocol->context;
2866 if (proto_ctx->packet)
2867 silc_packet_context_free(proto_ctx->packet);
2869 proto_ctx->packet = silc_packet_context_dup(packet);
2870 proto_ctx->dest_id_type = packet->src_id_type;
2871 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2872 packet->src_id_type);
2873 if (!proto_ctx->dest_id)
2876 /* Let the protocol handle the packet */
2877 silc_protocol_execute(sock->protocol, server->schedule,
2881 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2882 "protocol active (%s:%d [%s]).", sock->hostname,
2884 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2885 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2886 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2891 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2893 * Connection authentication request packet. When we receive this packet
2894 * we will send to the other end information about our mandatory
2895 * authentication method for the connection. This packet maybe received
2898 if (packet->flags & SILC_PACKET_FLAG_LIST)
2900 silc_server_connection_auth_request(server, sock, packet);
2904 * Connection Authentication protocol packets
2906 case SILC_PACKET_CONNECTION_AUTH:
2907 /* Start of the authentication protocol. We receive here the
2908 authentication data and will verify it. */
2909 if (packet->flags & SILC_PACKET_FLAG_LIST)
2912 if (sock->protocol && sock->protocol->protocol->type
2913 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2915 SilcServerConnAuthInternalContext *proto_ctx =
2916 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2918 proto_ctx->packet = silc_packet_context_dup(packet);
2920 /* Let the protocol handle the packet */
2921 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2923 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2924 "protocol active (%s:%d [%s]).", sock->hostname,
2926 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2927 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2928 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2933 case SILC_PACKET_NEW_ID:
2935 * Received New ID packet. This includes some new ID that has been
2936 * created. It may be for client, server or channel. This is the way
2937 * to distribute information about new registered entities in the
2940 if (packet->flags & SILC_PACKET_FLAG_LIST)
2941 silc_server_new_id_list(server, sock, packet);
2943 silc_server_new_id(server, sock, packet);
2946 case SILC_PACKET_NEW_CLIENT:
2948 * Received new client packet. This includes client information that
2949 * we will use to create initial client ID. After creating new
2950 * ID we will send it to the client.
2952 if (packet->flags & SILC_PACKET_FLAG_LIST)
2954 silc_server_new_client(server, sock, packet);
2957 case SILC_PACKET_NEW_SERVER:
2959 * Received new server packet. This includes Server ID and some other
2960 * information that we may save. This is received after server has
2963 if (packet->flags & SILC_PACKET_FLAG_LIST)
2965 silc_server_new_server(server, sock, packet);
2968 case SILC_PACKET_NEW_CHANNEL:
2970 * Received new channel packet. Information about new channel in the
2971 * network are distributed using this packet.
2973 if (packet->flags & SILC_PACKET_FLAG_LIST)
2974 silc_server_new_channel_list(server, sock, packet);
2976 silc_server_new_channel(server, sock, packet);
2979 case SILC_PACKET_HEARTBEAT:
2981 * Received heartbeat.
2983 if (packet->flags & SILC_PACKET_FLAG_LIST)
2987 case SILC_PACKET_KEY_AGREEMENT:
2989 * Received heartbeat.
2991 if (packet->flags & SILC_PACKET_FLAG_LIST)
2993 silc_server_key_agreement(server, sock, packet);
2996 case SILC_PACKET_REKEY:
2998 * Received re-key packet. The sender wants to regenerate the session
3001 if (packet->flags & SILC_PACKET_FLAG_LIST)
3003 silc_server_rekey(server, sock, packet);
3006 case SILC_PACKET_REKEY_DONE:
3008 * The re-key is done.
3010 if (packet->flags & SILC_PACKET_FLAG_LIST)
3013 if (sock->protocol && sock->protocol->protocol &&
3014 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
3016 SilcServerRekeyInternalContext *proto_ctx =
3017 (SilcServerRekeyInternalContext *)sock->protocol->context;
3019 if (proto_ctx->packet)
3020 silc_packet_context_free(proto_ctx->packet);
3022 proto_ctx->packet = silc_packet_context_dup(packet);
3024 /* Let the protocol handle the packet */
3025 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
3027 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
3028 "protocol active (%s:%d [%s]).", sock->hostname,
3030 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3031 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3032 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3037 case SILC_PACKET_FTP:
3039 if (packet->flags & SILC_PACKET_FLAG_LIST)
3041 silc_server_ftp(server, sock, packet);
3044 case SILC_PACKET_RESUME_CLIENT:
3046 if (packet->flags & SILC_PACKET_FLAG_LIST)
3048 silc_server_resume_client(server, sock, packet);
3051 case SILC_PACKET_RESUME_ROUTER:
3052 /* Resume router packet received. This packet is received for backup
3053 router resuming protocol. */
3054 if (packet->flags & SILC_PACKET_FLAG_LIST)
3056 silc_server_backup_resume_router(server, sock, packet);
3060 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
3065 /* Creates connection to a remote router. */
3067 void silc_server_create_connection(SilcServer server,
3068 const char *remote_host, SilcUInt32 port)
3070 SilcServerConnection sconn;
3072 /* Allocate connection object for hold connection specific stuff. */
3073 sconn = silc_calloc(1, sizeof(*sconn));
3074 sconn->remote_host = strdup(remote_host);
3075 sconn->remote_port = port;
3076 sconn->no_reconnect = TRUE;
3078 silc_schedule_task_add(server->schedule, 0,
3079 silc_server_connect_router,
3080 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
3081 SILC_TASK_PRI_NORMAL);
3084 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3086 SilcServer server = app_context;
3087 SilcSocketConnection sock = context;
3089 SILC_LOG_DEBUG(("Deleting socket %p", sock));
3091 /* Close the actual connection */
3092 silc_net_close_connection(sock->sock);
3093 server->sockets[sock->sock] = NULL;
3095 /* We won't listen for this connection anymore */
3096 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3097 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
3099 silc_socket_free(sock);
3102 /* Closes connection to socket connection */
3104 void silc_server_close_connection(SilcServer server,
3105 SilcSocketConnection sock)
3109 if (SILC_IS_DISCONNECTED(sock)) {
3110 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
3111 silc_schedule_task_add(server->schedule, sock->sock,
3112 silc_server_close_connection_final,
3113 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3114 SILC_TASK_PRI_NORMAL);
3115 server->sockets[sock->sock] = NULL;
3119 /* If any protocol is active cancel its execution. It will call
3120 the final callback which will finalize the disconnection. */
3121 if (sock->protocol && sock->protocol->protocol &&
3122 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3123 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3124 silc_protocol_cancel(sock->protocol, server->schedule);
3125 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3126 silc_protocol_execute_final(sock->protocol, server->schedule);
3127 sock->protocol = NULL;
3131 memset(tmp, 0, sizeof(tmp));
3132 silc_socket_get_error(sock, tmp, sizeof(tmp));
3133 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
3135 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
3136 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
3137 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
3138 "Router"), tmp[0] ? tmp : ""));
3140 SILC_SET_DISCONNECTED(sock);
3141 silc_schedule_task_add(server->schedule, sock->sock,
3142 silc_server_close_connection_final,
3143 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
3144 SILC_TASK_PRI_NORMAL);
3145 server->sockets[sock->sock] = NULL;
3148 /* Sends disconnect message to remote connection and disconnects the
3149 connection. NOTE: If this is called from protocol callback
3150 then sock->protocol must be set NULL before calling this, since
3151 this routine dispatches protocol callbacks too. */
3153 void silc_server_disconnect_remote(SilcServer server,
3154 SilcSocketConnection sock,
3155 SilcStatus status, ...)
3158 unsigned char buf[512];
3166 if (SILC_IS_DISCONNECTING(sock)) {
3167 SILC_SET_DISCONNECTED(sock);
3168 silc_server_close_connection(server, sock);
3172 memset(buf, 0, sizeof(buf));
3173 va_start(ap, status);
3174 cp = va_arg(ap, char *);
3176 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3181 SILC_LOG_DEBUG(("Disconnecting remote host"));
3183 /* Notify remote end that the conversation is over. The notify message
3184 is tried to be sent immediately. */
3188 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3190 buffer = silc_buffer_alloc_size(len);
3194 buffer->data[0] = status;
3196 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3198 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3199 buffer->data, buffer->len, TRUE);
3200 silc_buffer_free(buffer);
3203 silc_server_packet_queue_purge(server, sock);
3205 /* Mark the connection to be disconnected */
3206 SILC_SET_DISCONNECTING(sock);
3207 silc_server_close_connection(server, sock);
3210 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3212 SilcServer server = app_context;
3213 SilcClientEntry client = context;
3215 assert(!silc_hash_table_count(client->channels));
3217 silc_idlist_del_data(client);
3218 silc_idcache_purge_by_context(server->local_list->clients, client);
3221 /* Frees client data and notifies about client's signoff. */
3223 void silc_server_free_client_data(SilcServer server,
3224 SilcSocketConnection sock,
3225 SilcClientEntry client,
3227 const char *signoff)
3229 SILC_LOG_DEBUG(("Freeing client data"));
3231 /* If there is pending outgoing data for the client then purge it
3232 to the network before removing the client entry. */
3233 silc_server_packet_queue_purge(server, sock);
3236 /* Check if anyone is watching this nickname */
3237 if (server->server_type == SILC_ROUTER)
3238 silc_server_check_watcher_list(server, client, NULL,
3239 SILC_NOTIFY_TYPE_SIGNOFF);
3241 /* Send SIGNOFF notify to routers. */
3243 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3244 SILC_BROADCAST(server), client->id,
3248 /* Remove client from all channels */
3250 silc_server_remove_from_channels(server, NULL, client,
3251 TRUE, (char *)signoff, TRUE, FALSE);
3253 silc_server_remove_from_channels(server, NULL, client,
3254 FALSE, NULL, FALSE, FALSE);
3256 /* Remove this client from watcher list if it is */
3257 silc_server_del_from_watcher_list(server, client);
3259 /* Update statistics */
3260 server->stat.my_clients--;
3261 server->stat.clients--;
3262 if (server->stat.cell_clients)
3263 server->stat.cell_clients--;
3264 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3265 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3266 silc_schedule_task_del_by_context(server->schedule, client);
3268 /* We will not delete the client entry right away. We will take it
3269 into history (for WHOWAS command) for 5 minutes, unless we're
3270 shutting down server. */
3271 if (!server->server_shutdown) {
3272 silc_schedule_task_add(server->schedule, 0,
3273 silc_server_free_client_data_timeout,
3275 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3276 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3277 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3279 client->router = NULL;
3280 client->connection = NULL;
3282 /* Delete directly since we're shutting down server */
3283 silc_idlist_del_data(client);
3284 silc_idlist_del_client(server->local_list, client);
3288 /* Frees user_data pointer from socket connection object. This also sends
3289 appropriate notify packets to the network to inform about leaving
3292 void silc_server_free_sock_user_data(SilcServer server,
3293 SilcSocketConnection sock,
3294 const char *signoff_message)
3297 /* If any protocol is active cancel its execution */
3298 if (sock->protocol && sock->protocol->protocol &&
3299 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3300 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3301 silc_protocol_cancel(sock->protocol, server->schedule);
3302 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3303 silc_protocol_execute_final(sock->protocol, server->schedule);
3304 sock->protocol = NULL;
3307 switch (sock->type) {
3308 case SILC_SOCKET_TYPE_CLIENT:
3310 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3311 silc_server_free_client_data(server, sock, user_data, TRUE,
3315 case SILC_SOCKET_TYPE_SERVER:
3316 case SILC_SOCKET_TYPE_ROUTER:
3318 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3319 SilcServerEntry backup_router = NULL;
3321 SILC_LOG_DEBUG(("Freeing server data"));
3324 backup_router = silc_server_backup_get(server, user_data->id);
3326 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3327 backup_router == server->id_entry &&
3328 sock->type != SILC_SOCKET_TYPE_ROUTER)
3329 backup_router = NULL;
3331 if (server->server_shutdown || server->backup_noswitch)
3332 backup_router = NULL;
3334 /* If this was our primary router connection then we're lost to
3335 the outside world. */
3336 if (server->router == user_data) {
3337 /* Check whether we have a backup router connection */
3338 if (!backup_router || backup_router == user_data) {
3339 if (!server->no_reconnect)
3340 silc_server_create_connections(server);
3341 server->id_entry->router = NULL;
3342 server->router = NULL;
3343 server->standalone = TRUE;
3344 server->backup_primary = FALSE;
3345 backup_router = NULL;
3347 if (server->id_entry != backup_router) {
3348 SILC_LOG_INFO(("New primary router is backup router %s",
3349 backup_router->server_name));
3350 server->id_entry->router = backup_router;
3351 server->router = backup_router;
3352 server->router_connect = time(0);
3353 server->backup_primary = TRUE;
3354 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3356 /* Send START_USE to backup router to indicate we have switched */
3357 silc_server_backup_send_start_use(server,
3358 backup_router->connection,
3361 SILC_LOG_INFO(("We are now new primary router in this cell"));
3362 server->id_entry->router = NULL;
3363 server->router = NULL;
3364 server->standalone = TRUE;
3367 /* We stop here to take a breath */
3370 if (server->backup_router) {
3371 server->server_type = SILC_ROUTER;
3373 /* We'll need to constantly try to reconnect to the primary
3374 router so that we'll see when it comes back online. */
3375 silc_server_backup_reconnect(server, sock->ip, sock->port,
3376 silc_server_backup_connected,
3380 /* Mark this connection as replaced */
3381 silc_server_backup_replaced_add(server, user_data->id,
3384 } else if (backup_router) {
3385 SILC_LOG_INFO(("Enabling the use of backup router %s",
3386 backup_router->server_name));
3388 /* Mark this connection as replaced */
3389 silc_server_backup_replaced_add(server, user_data->id,
3391 } else if (server->server_type == SILC_SERVER &&
3392 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3393 /* Reconnect to the router (backup) */
3394 if (!server->no_reconnect)
3395 silc_server_create_connections(server);
3398 if (user_data->server_name)
3399 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3400 ("Server %s signoff", user_data->server_name));
3402 if (!backup_router) {
3403 /* Remove all servers that are originated from this server, and
3404 remove the clients of those servers too. */
3405 silc_server_remove_servers_by_server(server, user_data, TRUE);
3408 /* Remove the clients that this server owns as they will become
3409 invalid now too. For backup router the server is actually
3410 coming from the primary router, so mark that as the owner
3412 if (server->server_type == SILC_BACKUP_ROUTER &&
3413 sock->type == SILC_SOCKET_TYPE_SERVER)
3414 silc_server_remove_clients_by_server(server, server->router,
3418 silc_server_remove_clients_by_server(server, user_data,
3421 /* Remove channels owned by this server */
3422 if (server->server_type == SILC_SERVER)
3423 silc_server_remove_channels_by_server(server, user_data);
3425 /* Enable local server connections that may be disabled */
3426 silc_server_local_servers_toggle_enabled(server, TRUE);
3428 /* Update the client entries of this server to the new backup
3429 router. If we are the backup router we also resolve the real
3430 servers for the clients. After updating is over this also
3431 removes the clients that this server explicitly owns. */
3432 silc_server_update_clients_by_server(server, user_data,
3433 backup_router, TRUE);
3435 /* If we are router and just lost our primary router (now standlaone)
3436 we remove everything that was behind it, since we don't know
3438 if (server->server_type == SILC_ROUTER && server->standalone)
3439 /* Remove all servers that are originated from this server, and
3440 remove the clients of those servers too. */
3441 silc_server_remove_servers_by_server(server, user_data, TRUE);
3443 /* Finally remove the clients that are explicitly owned by this
3444 server. They go down with the server. */
3445 silc_server_remove_clients_by_server(server, user_data,
3448 /* Update our server cache to use the new backup router too. */
3449 silc_server_update_servers_by_server(server, user_data, backup_router);
3450 if (server->server_type == SILC_SERVER)
3451 silc_server_update_channels_by_server(server, user_data,
3454 /* Send notify about primary router going down to local operators */
3455 if (server->backup_router)
3456 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3457 SILC_NOTIFY_TYPE_NONE,
3458 ("%s switched to backup router %s "
3459 "(we are primary router now)",
3460 server->server_name, server->server_name));
3461 else if (server->router)
3462 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3463 SILC_NOTIFY_TYPE_NONE,
3464 ("%s switched to backup router %s",
3465 server->server_name,
3466 server->router->server_name));
3468 server->backup_noswitch = FALSE;
3470 /* Free the server entry */
3471 silc_server_backup_del(server, user_data);
3472 silc_server_backup_replaced_del(server, user_data);
3473 silc_idlist_del_data(user_data);
3474 if (!silc_idlist_del_server(server->local_list, user_data))
3475 silc_idlist_del_server(server->global_list, user_data);
3476 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3477 server->stat.my_servers--;
3479 server->stat.my_routers--;
3480 server->stat.routers--;
3482 server->stat.servers--;
3483 if (server->server_type == SILC_ROUTER)
3484 server->stat.cell_servers--;
3486 if (backup_router && backup_router != server->id_entry) {
3487 /* Announce all of our stuff that was created about 5 minutes ago.
3488 The backup router knows all the other stuff already. */
3489 if (server->server_type == SILC_ROUTER)
3490 silc_server_announce_servers(server, FALSE, time(0) - 300,
3491 backup_router->connection);
3493 /* Announce our clients and channels to the router */
3494 silc_server_announce_clients(server, time(0) - 300,
3495 backup_router->connection);
3496 silc_server_announce_channels(server, time(0) - 300,
3497 backup_router->connection);
3503 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3505 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3507 silc_idlist_del_data(user_data);
3508 silc_free(user_data);
3513 sock->user_data = NULL;
3516 /* Removes client from all channels it has joined. This is used when client
3517 connection is disconnected. If the client on a channel is last, the
3518 channel is removed as well. This sends the SIGNOFF notify types. */
3520 void silc_server_remove_from_channels(SilcServer server,
3521 SilcSocketConnection sock,
3522 SilcClientEntry client,
3524 const char *signoff_message,
3528 SilcChannelEntry channel;
3529 SilcChannelClientEntry chl;
3530 SilcHashTableList htl;
3531 SilcBuffer clidp = NULL;
3536 if (notify && !client->id)
3539 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3540 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3543 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3548 /* Remove the client from all channels. The client is removed from
3549 the channels' user list. */
3550 silc_hash_table_list(client->channels, &htl);
3551 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3552 channel = chl->channel;
3554 /* Remove channel if this is last client leaving the channel, unless
3555 the channel is permanent. */
3556 if (server->server_type != SILC_SERVER &&
3557 silc_hash_table_count(channel->user_list) < 2) {
3558 silc_server_channel_delete(server, channel);
3562 silc_hash_table_del(client->channels, channel);
3563 silc_hash_table_del(channel->user_list, client);
3564 channel->user_count--;
3566 /* If there is no global users on the channel anymore mark the channel
3567 as local channel. Do not check if the removed client is local client. */
3568 if (server->server_type == SILC_SERVER && channel->global_users &&
3569 chl->client->router && !silc_server_channel_has_global(channel))
3570 channel->global_users = FALSE;
3572 memset(chl, 'A', sizeof(*chl));
3575 /* Update statistics */
3576 if (SILC_IS_LOCAL(client))
3577 server->stat.my_chanclients--;
3578 if (server->server_type == SILC_ROUTER) {
3579 server->stat.cell_chanclients--;
3580 server->stat.chanclients--;
3583 /* If there is not at least one local user on the channel then we don't
3584 need the channel entry anymore, we can remove it safely, unless the
3585 channel is permanent channel */
3586 if (server->server_type == SILC_SERVER &&
3587 !silc_server_channel_has_local(channel)) {
3588 /* Notify about leaving client if this channel has global users. */
3589 if (notify && channel->global_users)
3590 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3591 SILC_NOTIFY_TYPE_SIGNOFF,
3592 signoff_message ? 2 : 1,
3593 clidp->data, clidp->len,
3594 signoff_message, signoff_message ?
3595 strlen(signoff_message) : 0);
3597 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3598 silc_server_channel_delete(server, channel);
3602 /* Send notify to channel about client leaving SILC and channel too */
3604 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3605 SILC_NOTIFY_TYPE_SIGNOFF,
3606 signoff_message ? 2 : 1,
3607 clidp->data, clidp->len,
3608 signoff_message, signoff_message ?
3609 strlen(signoff_message) : 0);
3611 if (killed && clidp) {
3612 /* Remove the client from channel's invite list */
3613 if (channel->invite_list &&
3614 silc_hash_table_count(channel->invite_list)) {
3616 SilcArgumentPayload iargs;
3617 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3619 iargs = silc_argument_payload_parse(ab->data, ab->len, 1);
3620 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3621 silc_buffer_free(ab);
3622 silc_argument_payload_free(iargs);
3626 /* Don't create keys if we are shutting down */
3627 if (server->server_shutdown)
3630 /* Re-generate channel key if needed */
3631 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3632 if (!silc_server_create_channel_key(server, channel, 0))
3635 /* Send the channel key to the channel. The key of course is not sent
3636 to the client who was removed from the channel. */
3637 silc_server_send_channel_key(server, client->connection, channel,
3638 server->server_type == SILC_ROUTER ?
3639 FALSE : !server->standalone);
3643 silc_hash_table_list_reset(&htl);
3645 silc_buffer_free(clidp);
3648 /* Removes client from one channel. This is used for example when client
3649 calls LEAVE command to remove itself from the channel. Returns TRUE
3650 if channel still exists and FALSE if the channel is removed when
3651 last client leaves the channel. If `notify' is FALSE notify messages
3654 bool silc_server_remove_from_one_channel(SilcServer server,
3655 SilcSocketConnection sock,
3656 SilcChannelEntry channel,
3657 SilcClientEntry client,
3660 SilcChannelClientEntry chl;
3663 SILC_LOG_DEBUG(("Removing %s from channel %s",
3664 silc_id_render(client->id, SILC_ID_CLIENT),
3665 channel->channel_name));
3667 /* Get the entry to the channel, if this client is not on the channel
3669 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3672 /* Remove channel if this is last client leaving the channel, unless
3673 the channel is permanent. */
3674 if (server->server_type != SILC_SERVER &&
3675 silc_hash_table_count(channel->user_list) < 2) {
3676 silc_server_channel_delete(server, channel);
3680 silc_hash_table_del(client->channels, channel);
3681 silc_hash_table_del(channel->user_list, client);
3682 channel->user_count--;
3684 /* If there is no global users on the channel anymore mark the channel
3685 as local channel. Do not check if the client is local client. */
3686 if (server->server_type == SILC_SERVER && channel->global_users &&
3687 chl->client->router && !silc_server_channel_has_global(channel))
3688 channel->global_users = FALSE;
3690 memset(chl, 'O', sizeof(*chl));
3693 /* Update statistics */
3694 if (SILC_IS_LOCAL(client))
3695 server->stat.my_chanclients--;
3696 if (server->server_type == SILC_ROUTER) {
3697 server->stat.cell_chanclients--;
3698 server->stat.chanclients--;
3701 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3705 /* If there is not at least one local user on the channel then we don't
3706 need the channel entry anymore, we can remove it safely, unless the
3707 channel is permanent channel */
3708 if (server->server_type == SILC_SERVER &&
3709 !silc_server_channel_has_local(channel)) {
3710 /* Notify about leaving client if this channel has global users. */
3711 if (notify && channel->global_users)
3712 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3713 SILC_NOTIFY_TYPE_LEAVE, 1,
3714 clidp->data, clidp->len);
3716 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3717 silc_server_channel_delete(server, channel);
3718 silc_buffer_free(clidp);
3722 /* Send notify to channel about client leaving the channel */
3724 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3725 SILC_NOTIFY_TYPE_LEAVE, 1,
3726 clidp->data, clidp->len);
3728 silc_buffer_free(clidp);
3732 /* Timeout callback. This is called if connection is idle or for some
3733 other reason is not responding within some period of time. This
3734 disconnects the remote end. */
3736 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3738 SilcServer server = (SilcServer)context;
3739 SilcSocketConnection sock = server->sockets[fd];
3740 SilcProtocolType protocol = 0;
3742 SILC_LOG_DEBUG(("Start"));
3747 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3748 sock->hostname, sock->ip));
3750 /* If we have protocol active we must assure that we call the protocol's
3751 final callback so that all the memory is freed. */
3752 if (sock->protocol && sock->protocol->protocol &&
3753 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3754 protocol = sock->protocol->protocol->type;
3755 silc_protocol_cancel(sock->protocol, server->schedule);
3756 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3757 silc_protocol_execute_final(sock->protocol, server->schedule);
3758 sock->protocol = NULL;
3762 silc_server_disconnect_remote(server, sock,
3764 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3765 SILC_STATUS_ERR_AUTH_FAILED :
3766 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3767 "Connection timeout");
3769 if (sock->user_data)
3770 silc_server_free_sock_user_data(server, sock, NULL);
3773 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3774 function may be used only by router. In real SILC network all channels
3775 are created by routers thus this function is never used by normal
3778 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3779 SilcServerID *router_id,
3785 SilcChannelID *channel_id;
3786 SilcChannelEntry entry;
3790 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3793 cipher = SILC_DEFAULT_CIPHER;
3795 hmac = SILC_DEFAULT_HMAC;
3797 /* Allocate cipher */
3798 if (!silc_cipher_alloc(cipher, &key))
3802 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3803 silc_cipher_free(key);
3807 channel_name = strdup(channel_name);
3809 /* Create the channel ID */
3810 if (!silc_id_create_channel_id(server, router_id, server->rng,
3812 silc_free(channel_name);
3813 silc_cipher_free(key);
3814 silc_hmac_free(newhmac);
3818 /* Create the channel */
3819 entry = silc_idlist_add_channel(server->local_list, channel_name,
3820 SILC_CHANNEL_MODE_NONE, channel_id,
3821 NULL, key, newhmac, 0);
3823 silc_free(channel_name);
3824 silc_cipher_free(key);
3825 silc_hmac_free(newhmac);
3826 silc_free(channel_id);
3830 entry->cipher = strdup(cipher);
3831 entry->hmac_name = strdup(hmac);
3833 /* Now create the actual key material */
3834 if (!silc_server_create_channel_key(server, entry,
3835 silc_cipher_get_key_len(key) / 8)) {
3836 silc_idlist_del_channel(server->local_list, entry);
3840 /* Notify other routers about the new channel. We send the packet
3841 to our primary route. */
3843 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3844 channel_name, entry->id,
3845 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3848 /* Distribute to backup routers */
3849 if (broadcast && server->server_type == SILC_ROUTER) {
3852 SilcUInt32 name_len = strlen(channel_name);
3853 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3854 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3856 packet = silc_channel_payload_encode(channel_name, name_len,
3857 cid, channel_id_len, entry->mode);
3858 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3859 packet->data, packet->len, FALSE, TRUE);
3861 silc_buffer_free(packet);
3864 server->stat.my_channels++;
3865 if (server->server_type == SILC_ROUTER) {
3866 server->stat.channels++;
3867 server->stat.cell_channels++;
3868 entry->users_resolved = TRUE;
3874 /* Same as above but creates the channel with Channel ID `channel_id. */
3877 silc_server_create_new_channel_with_id(SilcServer server,
3881 SilcChannelID *channel_id,
3884 SilcChannelEntry entry;
3888 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3891 cipher = SILC_DEFAULT_CIPHER;
3893 hmac = SILC_DEFAULT_HMAC;
3895 /* Allocate cipher */
3896 if (!silc_cipher_alloc(cipher, &key))
3900 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3901 silc_cipher_free(key);
3905 channel_name = strdup(channel_name);
3907 /* Create the channel */
3908 entry = silc_idlist_add_channel(server->local_list, channel_name,
3909 SILC_CHANNEL_MODE_NONE, channel_id,
3910 NULL, key, newhmac, 0);
3912 silc_cipher_free(key);
3913 silc_hmac_free(newhmac);
3914 silc_free(channel_name);
3918 /* Now create the actual key material */
3919 if (!silc_server_create_channel_key(server, entry,
3920 silc_cipher_get_key_len(key) / 8)) {
3921 silc_idlist_del_channel(server->local_list, entry);
3925 /* Notify other routers about the new channel. We send the packet
3926 to our primary route. */
3928 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3929 channel_name, entry->id,
3930 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3933 /* Distribute to backup routers */
3934 if (broadcast && server->server_type == SILC_ROUTER) {
3937 SilcUInt32 name_len = strlen(channel_name);
3938 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3939 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3941 packet = silc_channel_payload_encode(channel_name, name_len,
3942 cid, channel_id_len, entry->mode);
3943 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3944 packet->data, packet->len, FALSE, TRUE);
3946 silc_buffer_free(packet);
3949 server->stat.my_channels++;
3950 if (server->server_type == SILC_ROUTER) {
3951 server->stat.channels++;
3952 server->stat.cell_channels++;
3953 entry->users_resolved = TRUE;
3959 /* Channel's key re-key timeout callback. */
3961 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3963 SilcServer server = app_context;
3964 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3968 /* Return now if we are shutting down */
3969 if (server->server_shutdown)
3972 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3975 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3978 /* Generates new channel key. This is used to create the initial channel key
3979 but also to re-generate new key for channel. If `key_len' is provided
3980 it is the bytes of the key length. */
3982 bool silc_server_create_channel_key(SilcServer server,
3983 SilcChannelEntry channel,
3987 unsigned char channel_key[32], hash[32];
3990 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3991 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3995 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3997 if (!channel->channel_key)
3998 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3999 channel->channel_key = NULL;
4005 else if (channel->key_len)
4006 len = channel->key_len / 8;
4008 len = silc_cipher_get_key_len(channel->channel_key) / 8;
4010 /* Create channel key */
4011 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
4014 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
4016 /* Remove old key if exists */
4018 memset(channel->key, 0, channel->key_len / 8);
4019 silc_free(channel->key);
4023 channel->key_len = len * 8;
4024 channel->key = silc_memdup(channel_key, len);
4025 memset(channel_key, 0, sizeof(channel_key));
4027 /* Generate HMAC key from the channel key data and set it */
4029 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4030 memset(channel->key, 0, channel->key_len / 8);
4031 silc_free(channel->key);
4032 channel->channel_key = NULL;
4035 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
4036 silc_hmac_set_key(channel->hmac, hash,
4037 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4038 memset(hash, 0, sizeof(hash));
4040 if (server->server_type == SILC_ROUTER) {
4041 if (!channel->rekey)
4042 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4043 channel->rekey->channel = channel;
4044 channel->rekey->key_len = key_len;
4045 if (channel->rekey->task)
4046 silc_schedule_task_del(server->schedule, channel->rekey->task);
4048 channel->rekey->task =
4049 silc_schedule_task_add(server->schedule, 0,
4050 silc_server_channel_key_rekey,
4051 (void *)channel->rekey,
4052 server->config->channel_rekey_secs, 0,
4054 SILC_TASK_PRI_NORMAL);
4060 /* Saves the channel key found in the encoded `key_payload' buffer. This
4061 function is used when we receive Channel Key Payload and also when we're
4062 processing JOIN command reply. Returns entry to the channel. */
4064 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
4065 SilcBuffer key_payload,
4066 SilcChannelEntry channel)
4068 SilcChannelKeyPayload payload = NULL;
4069 SilcChannelID *id = NULL;
4070 unsigned char *tmp, hash[32];
4074 /* Decode channel key payload */
4075 payload = silc_channel_key_payload_parse(key_payload->data,
4078 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
4083 /* Get the channel entry */
4086 /* Get channel ID */
4087 tmp = silc_channel_key_get_id(payload, &tmp_len);
4088 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
4094 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
4096 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
4098 if (server->server_type == SILC_ROUTER)
4099 SILC_LOG_ERROR(("Received key for non-existent channel %s",
4100 silc_id_render(id, SILC_ID_CHANNEL)));
4106 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4108 tmp = silc_channel_key_get_key(payload, &tmp_len);
4114 cipher = silc_channel_key_get_cipher(payload, NULL);
4120 /* Remove old key if exists */
4122 memset(channel->key, 0, channel->key_len / 8);
4123 silc_free(channel->key);
4124 silc_cipher_free(channel->channel_key);
4127 /* Create new cipher */
4128 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
4129 channel->channel_key = NULL;
4134 if (channel->cipher)
4135 silc_free(channel->cipher);
4136 channel->cipher = strdup(cipher);
4139 channel->key_len = tmp_len * 8;
4140 channel->key = silc_memdup(tmp, tmp_len);
4141 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
4143 /* Generate HMAC key from the channel key data and set it */
4145 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4146 memset(channel->key, 0, channel->key_len / 8);
4147 silc_free(channel->key);
4148 channel->channel_key = NULL;
4151 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4152 silc_hmac_set_key(channel->hmac, hash,
4153 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4155 memset(hash, 0, sizeof(hash));
4156 memset(tmp, 0, tmp_len);
4158 if (server->server_type == SILC_ROUTER) {
4159 if (!channel->rekey)
4160 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4161 channel->rekey->channel = channel;
4162 if (channel->rekey->task)
4163 silc_schedule_task_del(server->schedule, channel->rekey->task);
4165 channel->rekey->task =
4166 silc_schedule_task_add(server->schedule, 0,
4167 silc_server_channel_key_rekey,
4168 (void *)channel->rekey,
4169 server->config->channel_rekey_secs, 0,
4171 SILC_TASK_PRI_NORMAL);
4177 silc_channel_key_payload_free(payload);
4182 /* Heartbeat callback. This function is set as argument for the
4183 silc_socket_set_heartbeat function. The library will call this function
4184 at the set time interval. */
4186 void silc_server_perform_heartbeat(SilcSocketConnection sock,
4189 SilcServer server = hb_context;
4191 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
4192 sock->port, sock->ip));
4194 /* Send the heartbeat */
4195 silc_server_send_heartbeat(server, sock);
4198 /* Returns assembled of all servers in the given ID list. The packet's
4199 form is dictated by the New ID payload. */
4201 static void silc_server_announce_get_servers(SilcServer server,
4202 SilcServerEntry remote,
4204 SilcBuffer *servers,
4205 unsigned long creation_time)
4207 SilcIDCacheList list;
4208 SilcIDCacheEntry id_cache;
4209 SilcServerEntry entry;
4212 /* Go through all clients in the list */
4213 if (silc_idcache_get_all(id_list->servers, &list)) {
4214 if (silc_idcache_list_first(list, &id_cache)) {
4216 entry = (SilcServerEntry)id_cache->context;
4218 /* Do not announce the one we've sending our announcements and
4219 do not announce ourself. Also check the creation time if it's
4221 if ((entry == remote) || (entry == server->id_entry) ||
4222 (creation_time && entry->data.created < creation_time)) {
4223 if (!silc_idcache_list_next(list, &id_cache))
4228 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4230 *servers = silc_buffer_realloc(*servers,
4232 (*servers)->truelen + idp->len :
4234 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4235 silc_buffer_put(*servers, idp->data, idp->len);
4236 silc_buffer_pull(*servers, idp->len);
4237 silc_buffer_free(idp);
4239 if (!silc_idcache_list_next(list, &id_cache))
4244 silc_idcache_list_free(list);
4249 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4255 p = silc_notify_payload_encode(notify, argc, ap);
4261 /* This function is used by router to announce existing servers to our
4262 primary router when we've connected to it. If `creation_time' is non-zero
4263 then only the servers that has been created after the `creation_time'
4264 will be announced. */
4266 void silc_server_announce_servers(SilcServer server, bool global,
4267 unsigned long creation_time,
4268 SilcSocketConnection remote)
4270 SilcBuffer servers = NULL;
4272 SILC_LOG_DEBUG(("Announcing servers"));
4274 /* Get servers in local list */
4275 silc_server_announce_get_servers(server, remote->user_data,
4276 server->local_list, &servers,
4280 /* Get servers in global list */
4281 silc_server_announce_get_servers(server, remote->user_data,
4282 server->global_list, &servers,
4286 silc_buffer_push(servers, servers->data - servers->head);
4287 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4289 /* Send the packet */
4290 silc_server_packet_send(server, remote,
4291 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4292 servers->data, servers->len, TRUE);
4294 silc_buffer_free(servers);
4298 /* Returns assembled packet of all clients in the given ID list. The
4299 packet's form is dictated by the New ID Payload. */
4301 static void silc_server_announce_get_clients(SilcServer server,
4303 SilcBuffer *clients,
4305 unsigned long creation_time)
4307 SilcIDCacheList list;
4308 SilcIDCacheEntry id_cache;
4309 SilcClientEntry client;
4312 unsigned char mode[4];
4314 /* Go through all clients in the list */
4315 if (silc_idcache_get_all(id_list->clients, &list)) {
4316 if (silc_idcache_list_first(list, &id_cache)) {
4318 client = (SilcClientEntry)id_cache->context;
4320 if (creation_time && client->data.created < creation_time) {
4321 if (!silc_idcache_list_next(list, &id_cache))
4325 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4326 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4327 if (!silc_idcache_list_next(list, &id_cache))
4332 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4334 *clients = silc_buffer_realloc(*clients,
4336 (*clients)->truelen + idp->len :
4338 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4339 silc_buffer_put(*clients, idp->data, idp->len);
4340 silc_buffer_pull(*clients, idp->len);
4342 SILC_PUT32_MSB(client->mode, mode);
4344 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4345 2, idp->data, idp->len,
4347 *umodes = silc_buffer_realloc(*umodes,
4349 (*umodes)->truelen + tmp->len :
4351 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4352 silc_buffer_put(*umodes, tmp->data, tmp->len);
4353 silc_buffer_pull(*umodes, tmp->len);
4354 silc_buffer_free(tmp);
4356 silc_buffer_free(idp);
4358 if (!silc_idcache_list_next(list, &id_cache))
4363 silc_idcache_list_free(list);
4367 /* This function is used to announce our existing clients to our router
4368 when we've connected to it. If `creation_time' is non-zero then only
4369 the clients that has been created after the `creation_time' will be
4372 void silc_server_announce_clients(SilcServer server,
4373 unsigned long creation_time,
4374 SilcSocketConnection remote)
4376 SilcBuffer clients = NULL;
4377 SilcBuffer umodes = NULL;
4379 SILC_LOG_DEBUG(("Announcing clients"));
4381 /* Get clients in local list */
4382 silc_server_announce_get_clients(server, server->local_list,
4383 &clients, &umodes, creation_time);
4385 /* As router we announce our global list as well */
4386 if (server->server_type == SILC_ROUTER)
4387 silc_server_announce_get_clients(server, server->global_list,
4388 &clients, &umodes, creation_time);
4391 silc_buffer_push(clients, clients->data - clients->head);
4392 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4394 /* Send the packet */
4395 silc_server_packet_send(server, remote,
4396 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4397 clients->data, clients->len, TRUE);
4399 silc_buffer_free(clients);
4403 silc_buffer_push(umodes, umodes->data - umodes->head);
4404 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4406 /* Send the packet */
4407 silc_server_packet_send(server, remote,
4408 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4409 umodes->data, umodes->len, TRUE);
4411 silc_buffer_free(umodes);
4415 /* Returns channel's topic for announcing it */
4417 void silc_server_announce_get_channel_topic(SilcServer server,
4418 SilcChannelEntry channel,
4423 if (channel->topic) {
4424 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4425 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4426 chidp->data, chidp->len,
4428 strlen(channel->topic));
4429 silc_buffer_free(chidp);
4433 /* Returns channel's invite and ban lists */
4435 void silc_server_announce_get_inviteban(SilcServer server,
4436 SilcChannelEntry channel,
4440 SilcBuffer list, idp, idp2, tmp2;
4442 SilcHashTableList htl;
4443 const unsigned char a[1] = { 0x03 };
4445 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4447 /* Encode invite list */
4448 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4449 list = silc_buffer_alloc_size(2);
4450 type = silc_hash_table_count(channel->invite_list);
4451 SILC_PUT16_MSB(type, list->data);
4452 silc_hash_table_list(channel->invite_list, &htl);
4453 while (silc_hash_table_get(&htl, (void **)&type, (void **)&tmp2))
4454 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4456 silc_hash_table_list_reset(&htl);
4458 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4460 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4461 idp->data, idp->len,
4462 channel->channel_name,
4463 strlen(channel->channel_name),
4464 idp2->data, idp2->len,
4466 list->data, list->len);
4467 silc_buffer_free(idp2);
4468 silc_buffer_free(list);
4471 /* Encode ban list */
4472 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4473 list = silc_buffer_alloc_size(2);
4474 type = silc_hash_table_count(channel->ban_list);
4475 SILC_PUT16_MSB(type, list->data);
4476 silc_hash_table_list(channel->ban_list, &htl);
4477 while (silc_hash_table_get(&htl, (void **)&type, (void **)&tmp2))
4478 list = silc_argument_payload_encode_one(list, tmp2->data, tmp2->len,
4480 silc_hash_table_list_reset(&htl);
4483 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4484 idp->data, idp->len,
4486 list->data, list->len);
4487 silc_buffer_free(list);
4490 silc_buffer_free(idp);
4493 /* Returns assembled packets for channel users of the `channel'. */
4495 void silc_server_announce_get_channel_users(SilcServer server,
4496 SilcChannelEntry channel,
4497 SilcBuffer *channel_modes,
4498 SilcBuffer *channel_users,
4499 SilcBuffer *channel_users_modes)
4501 SilcChannelClientEntry chl;
4502 SilcHashTableList htl;
4503 SilcBuffer chidp, clidp, csidp;
4504 SilcBuffer tmp, fkey = NULL, chpklist;
4506 unsigned char mode[4];
4509 SILC_LOG_DEBUG(("Start"));
4511 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4512 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4513 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4516 SILC_PUT32_MSB(channel->mode, mode);
4517 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4518 if (channel->founder_key)
4519 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4521 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4522 7, csidp->data, csidp->len,
4525 hmac, hmac ? strlen(hmac) : 0,
4526 channel->passphrase,
4527 channel->passphrase ?
4528 strlen(channel->passphrase) : 0,
4529 fkey ? fkey->data : NULL,
4530 fkey ? fkey->len : 0,
4531 chpklist ? chpklist->data : NULL,
4532 chpklist ? chpklist->len : 0);
4535 silc_buffer_realloc(*channel_modes,
4537 (*channel_modes)->truelen + len : len));
4538 silc_buffer_pull_tail(*channel_modes,
4539 ((*channel_modes)->end -
4540 (*channel_modes)->data));
4541 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4542 silc_buffer_pull(*channel_modes, len);
4543 silc_buffer_free(tmp);
4544 silc_buffer_free(fkey);
4547 /* Now find all users on the channel */
4548 silc_hash_table_list(channel->user_list, &htl);
4549 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4550 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4553 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4554 clidp->data, clidp->len,
4555 chidp->data, chidp->len);
4558 silc_buffer_realloc(*channel_users,
4560 (*channel_users)->truelen + len : len));
4561 silc_buffer_pull_tail(*channel_users,
4562 ((*channel_users)->end -
4563 (*channel_users)->data));
4565 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4566 silc_buffer_pull(*channel_users, len);
4567 silc_buffer_free(tmp);
4569 /* CUMODE notify for mode change on the channel */
4570 SILC_PUT32_MSB(chl->mode, mode);
4571 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4572 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4573 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4574 4, csidp->data, csidp->len,
4576 clidp->data, clidp->len,
4577 fkey ? fkey->data : NULL,
4578 fkey ? fkey->len : 0);
4580 *channel_users_modes =
4581 silc_buffer_realloc(*channel_users_modes,
4582 (*channel_users_modes ?
4583 (*channel_users_modes)->truelen + len : len));
4584 silc_buffer_pull_tail(*channel_users_modes,
4585 ((*channel_users_modes)->end -
4586 (*channel_users_modes)->data));
4588 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4589 silc_buffer_pull(*channel_users_modes, len);
4590 silc_buffer_free(tmp);
4591 silc_buffer_free(fkey);
4593 silc_buffer_free(clidp);
4595 silc_hash_table_list_reset(&htl);
4596 silc_buffer_free(chidp);
4597 silc_buffer_free(csidp);
4600 /* Returns assembled packets for all channels and users on those channels
4601 from the given ID List. The packets are in the form dictated by the
4602 New Channel and New Channel User payloads. */
4604 void silc_server_announce_get_channels(SilcServer server,
4606 SilcBuffer *channels,
4607 SilcBuffer **channel_modes,
4608 SilcBuffer *channel_users,
4609 SilcBuffer **channel_users_modes,
4610 SilcUInt32 *channel_users_modes_c,
4611 SilcBuffer **channel_topics,
4612 SilcBuffer **channel_invites,
4613 SilcBuffer **channel_bans,
4614 SilcChannelID ***channel_ids,
4615 unsigned long creation_time)
4617 SilcIDCacheList list;
4618 SilcIDCacheEntry id_cache;
4619 SilcChannelEntry channel;
4622 SilcUInt16 name_len;
4624 int i = *channel_users_modes_c;
4627 SILC_LOG_DEBUG(("Start"));
4629 /* Go through all channels in the list */
4630 if (silc_idcache_get_all(id_list->channels, &list)) {
4631 if (silc_idcache_list_first(list, &id_cache)) {
4633 channel = (SilcChannelEntry)id_cache->context;
4635 if (creation_time && channel->created < creation_time)
4640 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4641 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4642 name_len = strlen(channel->channel_name);
4645 len = 4 + name_len + id_len + 4;
4647 silc_buffer_realloc(*channels,
4648 (*channels ? (*channels)->truelen +
4650 silc_buffer_pull_tail(*channels,
4651 ((*channels)->end - (*channels)->data));
4652 silc_buffer_format(*channels,
4653 SILC_STR_UI_SHORT(name_len),
4654 SILC_STR_UI_XNSTRING(channel->channel_name,
4656 SILC_STR_UI_SHORT(id_len),
4657 SILC_STR_UI_XNSTRING(cid, id_len),
4658 SILC_STR_UI_INT(channel->mode),
4660 silc_buffer_pull(*channels, len);
4663 if (creation_time && channel->updated < creation_time)
4669 /* Channel user modes */
4670 *channel_users_modes = silc_realloc(*channel_users_modes,
4671 sizeof(**channel_users_modes) *
4673 (*channel_users_modes)[i] = NULL;
4674 *channel_modes = silc_realloc(*channel_modes,
4675 sizeof(**channel_modes) * (i + 1));
4676 (*channel_modes)[i] = NULL;
4677 *channel_ids = silc_realloc(*channel_ids,
4678 sizeof(**channel_ids) * (i + 1));
4679 (*channel_ids)[i] = NULL;
4680 silc_server_announce_get_channel_users(server, channel,
4681 &(*channel_modes)[i],
4683 &(*channel_users_modes)[i]);
4684 (*channel_ids)[i] = channel->id;
4686 /* Channel's topic */
4687 *channel_topics = silc_realloc(*channel_topics,
4688 sizeof(**channel_topics) * (i + 1));
4689 (*channel_topics)[i] = NULL;
4690 silc_server_announce_get_channel_topic(server, channel,
4691 &(*channel_topics)[i]);
4693 /* Channel's invite and ban list */
4694 *channel_invites = silc_realloc(*channel_invites,
4695 sizeof(**channel_invites) * (i + 1));
4696 (*channel_invites)[i] = NULL;
4697 *channel_bans = silc_realloc(*channel_bans,
4698 sizeof(**channel_bans) * (i + 1));
4699 (*channel_bans)[i] = NULL;
4700 silc_server_announce_get_inviteban(server, channel,
4701 &(*channel_invites)[i],
4702 &(*channel_bans)[i]);
4704 (*channel_users_modes_c)++;
4710 if (!silc_idcache_list_next(list, &id_cache))
4715 silc_idcache_list_free(list);
4719 /* This function is used to announce our existing channels to our router
4720 when we've connected to it. This also announces the users on the
4721 channels to the router. If the `creation_time' is non-zero only the
4722 channels that was created after the `creation_time' are announced.
4723 Note that the channel users are still announced even if the `creation_time'
4726 void silc_server_announce_channels(SilcServer server,
4727 unsigned long creation_time,
4728 SilcSocketConnection remote)
4730 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4731 SilcBuffer *channel_users_modes = NULL;
4732 SilcBuffer *channel_topics = NULL;
4733 SilcBuffer *channel_invites = NULL;
4734 SilcBuffer *channel_bans = NULL;
4735 SilcUInt32 channel_users_modes_c = 0;
4736 SilcChannelID **channel_ids = NULL;
4738 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4740 /* Get channels and channel users in local list */
4741 silc_server_announce_get_channels(server, server->local_list,
4742 &channels, &channel_modes,
4744 &channel_users_modes,
4745 &channel_users_modes_c,
4749 &channel_ids, creation_time);
4751 /* Get channels and channel users in global list */
4752 if (server->server_type != SILC_SERVER)
4753 silc_server_announce_get_channels(server, server->global_list,
4754 &channels, &channel_modes,
4756 &channel_users_modes,
4757 &channel_users_modes_c,
4761 &channel_ids, creation_time);
4764 silc_buffer_push(channels, channels->data - channels->head);
4765 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4767 /* Send the packet */
4768 silc_server_packet_send(server, remote,
4769 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4770 channels->data, channels->len,
4773 silc_buffer_free(channels);
4776 if (channel_users) {
4777 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4778 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4779 channel_users->len);
4781 /* Send the packet */
4782 silc_server_packet_send(server, remote,
4783 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4784 channel_users->data, channel_users->len,
4787 silc_buffer_free(channel_users);
4790 if (channel_modes) {
4793 for (i = 0; i < channel_users_modes_c; i++) {
4794 if (!channel_modes[i])
4796 silc_buffer_push(channel_modes[i],
4797 channel_modes[i]->data -
4798 channel_modes[i]->head);
4799 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4800 channel_modes[i]->len);
4801 silc_server_packet_send_dest(server, remote,
4802 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4803 channel_ids[i], SILC_ID_CHANNEL,
4804 channel_modes[i]->data,
4805 channel_modes[i]->len,
4807 silc_buffer_free(channel_modes[i]);
4809 silc_free(channel_modes);
4812 if (channel_users_modes) {
4815 for (i = 0; i < channel_users_modes_c; i++) {
4816 if (!channel_users_modes[i])
4818 silc_buffer_push(channel_users_modes[i],
4819 channel_users_modes[i]->data -
4820 channel_users_modes[i]->head);
4821 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4822 channel_users_modes[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_users_modes[i]->data,
4827 channel_users_modes[i]->len,
4829 silc_buffer_free(channel_users_modes[i]);
4831 silc_free(channel_users_modes);
4834 if (channel_topics) {
4837 for (i = 0; i < channel_users_modes_c; i++) {
4838 if (!channel_topics[i])
4841 silc_buffer_push(channel_topics[i],
4842 channel_topics[i]->data -
4843 channel_topics[i]->head);
4844 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4845 channel_topics[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_topics[i]->data,
4850 channel_topics[i]->len,
4852 silc_buffer_free(channel_topics[i]);
4854 silc_free(channel_topics);
4857 if (channel_invites) {
4860 for (i = 0; i < channel_users_modes_c; i++) {
4861 if (!channel_invites[i])
4864 silc_buffer_push(channel_invites[i],
4865 channel_invites[i]->data -
4866 channel_invites[i]->head);
4867 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4868 channel_invites[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_invites[i]->data,
4873 channel_invites[i]->len,
4875 silc_buffer_free(channel_invites[i]);
4877 silc_free(channel_invites);
4883 for (i = 0; i < channel_users_modes_c; i++) {
4884 if (!channel_bans[i])
4887 silc_buffer_push(channel_bans[i],
4888 channel_bans[i]->data -
4889 channel_bans[i]->head);
4890 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4891 channel_bans[i]->len);
4892 silc_server_packet_send_dest(server, remote,
4893 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4894 channel_ids[i], SILC_ID_CHANNEL,
4895 channel_bans[i]->data,
4896 channel_bans[i]->len,
4898 silc_buffer_free(channel_bans[i]);
4900 silc_free(channel_bans);
4903 silc_free(channel_ids);
4906 /* Assembles user list and users mode list from the `channel'. */
4908 bool silc_server_get_users_on_channel(SilcServer server,
4909 SilcChannelEntry channel,
4910 SilcBuffer *user_list,
4911 SilcBuffer *mode_list,
4912 SilcUInt32 *user_count)
4914 SilcChannelClientEntry chl;
4915 SilcHashTableList htl;
4916 SilcBuffer client_id_list;
4917 SilcBuffer client_mode_list;
4919 SilcUInt32 list_count = 0, len = 0;
4921 if (!silc_hash_table_count(channel->user_list))
4924 silc_hash_table_list(channel->user_list, &htl);
4925 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4926 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4927 silc_hash_table_list_reset(&htl);
4929 client_id_list = silc_buffer_alloc(len);
4931 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4932 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4933 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4935 silc_hash_table_list(channel->user_list, &htl);
4936 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4938 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4939 silc_buffer_put(client_id_list, idp->data, idp->len);
4940 silc_buffer_pull(client_id_list, idp->len);
4941 silc_buffer_free(idp);
4943 /* Client's mode on channel */
4944 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4945 silc_buffer_pull(client_mode_list, 4);
4949 silc_hash_table_list_reset(&htl);
4950 silc_buffer_push(client_id_list,
4951 client_id_list->data - client_id_list->head);
4952 silc_buffer_push(client_mode_list,
4953 client_mode_list->data - client_mode_list->head);
4955 *user_list = client_id_list;
4956 *mode_list = client_mode_list;
4957 *user_count = list_count;
4961 /* Saves users and their modes to the `channel'. */
4963 void silc_server_save_users_on_channel(SilcServer server,
4964 SilcSocketConnection sock,
4965 SilcChannelEntry channel,
4966 SilcClientID *noadd,
4967 SilcBuffer user_list,
4968 SilcBuffer mode_list,
4969 SilcUInt32 user_count)
4974 SilcClientID *client_id;
4975 SilcClientEntry client;
4976 SilcIDCacheEntry cache;
4977 SilcChannelClientEntry chl;
4979 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4980 channel->channel_name));
4982 for (i = 0; i < user_count; i++) {
4984 SILC_GET16_MSB(idp_len, user_list->data + 2);
4986 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4987 silc_buffer_pull(user_list, idp_len);
4992 SILC_GET32_MSB(mode, mode_list->data);
4993 silc_buffer_pull(mode_list, 4);
4995 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4996 silc_free(client_id);
5002 /* Check if we have this client cached already. */
5003 client = silc_idlist_find_client_by_id(server->local_list, client_id,
5004 server->server_type, &cache);
5006 client = silc_idlist_find_client_by_id(server->global_list,
5007 client_id, server->server_type,
5010 /* If router did not find such Client ID in its lists then this must
5011 be bogus client or some router in the net is buggy. */
5012 if (server->server_type != SILC_SERVER) {
5013 silc_free(client_id);
5017 /* We don't have that client anywhere, add it. The client is added
5018 to global list since server didn't have it in the lists so it must be
5020 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
5021 silc_id_dup(client_id, SILC_ID_CLIENT),
5022 sock->user_data, NULL, 0);
5024 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5025 silc_free(client_id);
5029 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5034 silc_free(client_id);
5036 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5037 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5038 "%s", channel->channel_name));
5042 if (!silc_server_client_on_channel(client, channel, &chl)) {
5043 /* Client was not on the channel, add it. */
5044 chl = silc_calloc(1, sizeof(*chl));
5045 chl->client = client;
5047 chl->channel = channel;
5048 silc_hash_table_add(channel->user_list, chl->client, chl);
5049 silc_hash_table_add(client->channels, chl->channel, chl);
5050 channel->user_count++;
5058 /* Saves channels and channels user modes to the `client'. Removes
5059 the client from those channels that are not sent in the list but
5062 void silc_server_save_user_channels(SilcServer server,
5063 SilcSocketConnection sock,
5064 SilcClientEntry client,
5065 SilcBuffer channels,
5066 SilcBuffer channels_user_modes)
5069 SilcUInt32 *chumodes;
5070 SilcChannelPayload entry;
5071 SilcChannelEntry channel;
5072 SilcChannelID *channel_id;
5073 SilcChannelClientEntry chl;
5074 SilcHashTable ht = NULL;
5075 SilcHashTableList htl;
5079 if (!channels || !channels_user_modes ||
5080 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5083 ch = silc_channel_payload_parse_list(channels->data, channels->len);
5084 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5086 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5087 NULL, NULL, NULL, TRUE);
5088 silc_dlist_start(ch);
5089 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5090 /* Check if we have this channel, and add it if we don't have it.
5091 Also add the client on the channel unless it is there already. */
5092 channel_id = silc_channel_get_id_parse(entry);
5093 channel = silc_idlist_find_channel_by_id(server->local_list,
5096 channel = silc_idlist_find_channel_by_id(server->global_list,
5099 if (server->server_type != SILC_SERVER) {
5100 silc_free(channel_id);
5105 /* We don't have that channel anywhere, add it. */
5106 name = silc_channel_get_name(entry, NULL);
5107 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5108 channel_id, server->router,
5111 silc_free(channel_id);
5118 channel->mode = silc_channel_get_mode(entry);
5120 /* Add the client on the channel */
5121 if (!silc_server_client_on_channel(client, channel, &chl)) {
5122 chl = silc_calloc(1, sizeof(*chl));
5123 chl->client = client;
5124 chl->mode = chumodes[i++];
5125 chl->channel = channel;
5126 silc_hash_table_add(channel->user_list, chl->client, chl);
5127 silc_hash_table_add(client->channels, chl->channel, chl);
5128 channel->user_count++;
5131 chl->mode = chumodes[i++];
5134 silc_hash_table_add(ht, channel, channel);
5135 silc_free(channel_id);
5137 silc_channel_payload_list_free(ch);
5138 silc_free(chumodes);
5142 /* Go through the list again and remove client from channels that
5143 are no part of the list. */
5145 silc_hash_table_list(client->channels, &htl);
5146 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
5147 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5148 silc_hash_table_del(chl->channel->user_list, chl->client);
5149 silc_hash_table_del(chl->client->channels, chl->channel);
5153 silc_hash_table_list_reset(&htl);
5154 silc_hash_table_free(ht);
5156 silc_hash_table_list(client->channels, &htl);
5157 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
5158 silc_hash_table_del(chl->channel->user_list, chl->client);
5159 silc_hash_table_del(chl->client->channels, chl->channel);
5162 silc_hash_table_list_reset(&htl);
5166 /* Lookups route to the client indicated by the `id_data'. The connection
5167 object and internal data object is returned. Returns NULL if route
5168 could not be found to the client. If the `client_id' is specified then
5169 it is used and the `id_data' is ignored. */
5171 SilcSocketConnection
5172 silc_server_get_client_route(SilcServer server,
5173 unsigned char *id_data,
5175 SilcClientID *client_id,
5176 SilcIDListData *idata,
5177 SilcClientEntry *client_entry)
5180 SilcClientEntry client;
5182 SILC_LOG_DEBUG(("Start"));
5185 *client_entry = NULL;
5187 /* Decode destination Client ID */
5189 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
5191 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
5195 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5198 /* If the destination belongs to our server we don't have to route
5199 the packet anywhere but to send it to the local destination. */
5200 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5204 /* If we are router and the client has router then the client is in
5205 our cell but not directly connected to us. */
5206 if (server->server_type == SILC_ROUTER && client->router) {
5207 /* We are of course in this case the client's router thus the route
5208 to the client is the server who owns the client. So, we will send
5209 the packet to that server. */
5211 *idata = (SilcIDListData)client->router;
5212 return client->router->connection;
5215 /* Seems that client really is directly connected to us */
5217 *idata = (SilcIDListData)client;
5219 *client_entry = client;
5220 return client->connection;
5223 /* Destination belongs to someone not in this server. If we are normal
5224 server our action is to send the packet to our router. */
5225 if (server->server_type != SILC_ROUTER && !server->standalone) {
5228 *idata = (SilcIDListData)server->router;
5229 return SILC_PRIMARY_ROUTE(server);
5232 /* We are router and we will perform route lookup for the destination
5233 and send the packet to fastest route. */
5234 if (server->server_type == SILC_ROUTER && !server->standalone) {
5235 /* Check first that the ID is valid */
5236 client = silc_idlist_find_client_by_id(server->global_list, id,
5239 SilcSocketConnection dst_sock;
5241 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5245 *idata = (SilcIDListData)dst_sock->user_data;
5254 /* Encodes and returns channel list of channels the `client' has joined.
5255 Secret channels are not put to the list. */
5257 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5258 SilcClientEntry client,
5261 SilcBuffer *user_mode_list)
5263 SilcBuffer buffer = NULL;
5264 SilcChannelEntry channel;
5265 SilcChannelClientEntry chl;
5266 SilcHashTableList htl;
5269 SilcUInt16 name_len;
5273 *user_mode_list = NULL;
5275 silc_hash_table_list(client->channels, &htl);
5276 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5277 channel = chl->channel;
5279 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5281 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5284 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
5285 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
5286 name_len = strlen(channel->channel_name);
5288 len = 4 + name_len + id_len + 4;
5289 buffer = silc_buffer_realloc(buffer,
5290 (buffer ? buffer->truelen + len : len));
5291 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5292 silc_buffer_format(buffer,
5293 SILC_STR_UI_SHORT(name_len),
5294 SILC_STR_UI_XNSTRING(channel->channel_name,
5296 SILC_STR_UI_SHORT(id_len),
5297 SILC_STR_UI_XNSTRING(cid, id_len),
5298 SILC_STR_UI_INT(chl->channel->mode),
5300 silc_buffer_pull(buffer, len);
5303 if (user_mode_list) {
5304 *user_mode_list = silc_buffer_realloc(*user_mode_list,
5306 (*user_mode_list)->truelen + 4 :
5308 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5309 (*user_mode_list)->data));
5310 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5311 silc_buffer_pull(*user_mode_list, 4);
5314 silc_hash_table_list_reset(&htl);
5317 silc_buffer_push(buffer, buffer->data - buffer->head);
5318 if (user_mode_list && *user_mode_list)
5319 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5320 (*user_mode_list)->head));
5325 /* Timeout callback for unsuccessful rekey. The rekey did not go through
5328 SILC_TASK_CALLBACK(silc_server_rekey_timeout)
5330 SilcServerRekeyInternalContext *ctx = context;
5331 SilcServer server = app_context;
5332 SilcSocketConnection sock = ctx->sock;
5334 SILC_LOG_DEBUG(("Timeout occurred in rekey protocol with %s:%d [%s]",
5335 sock->hostname, sock->port,
5336 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5337 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5338 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5341 SILC_LOG_WARNING(("Timeout occurred in rekey protocol with %s:%d [%s]",
5342 sock->hostname, sock->port,
5343 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5344 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5345 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5348 if (sock->protocol) {
5349 silc_protocol_cancel(sock->protocol, server->schedule);
5350 silc_protocol_free(sock->protocol);
5351 sock->protocol = NULL;
5354 silc_packet_context_free(ctx->packet);
5356 silc_ske_free(ctx->ske);
5357 silc_socket_free(sock);
5361 /* A timeout callback for the re-key. We will be the initiator of the
5364 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5366 SilcServer server = app_context;
5367 SilcSocketConnection sock = (SilcSocketConnection)context;
5368 SilcIDListData idata = (SilcIDListData)sock->user_data;
5369 SilcProtocol protocol;
5370 SilcServerRekeyInternalContext *proto_ctx;
5375 /* Do not execute rekey with disabled connections, as it would not
5376 go through anyway. */
5377 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
5380 /* If rekey protocol is active already wait for it to finish */
5381 if (sock->protocol && sock->protocol->protocol &&
5382 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)
5385 /* If any other protocol is active do not start this protocol yet. */
5386 if (sock->protocol) {
5387 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
5388 silc_schedule_task_add(server->schedule, sock->sock,
5389 silc_server_rekey_callback,
5390 sock, 60, 0, SILC_TASK_TIMEOUT,
5391 SILC_TASK_PRI_NORMAL);
5395 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
5396 sock->hostname, sock->port,
5397 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5398 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5399 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5402 /* Allocate internal protocol context. This is sent as context
5404 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5405 proto_ctx->server = (void *)server;
5406 proto_ctx->sock = silc_socket_dup(sock);
5407 proto_ctx->responder = FALSE;
5408 proto_ctx->pfs = idata->rekey->pfs;
5410 /* Perform rekey protocol. Will call the final callback after the
5411 protocol is over. */
5412 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5413 &protocol, proto_ctx, silc_server_rekey_final);
5414 sock->protocol = protocol;
5416 /* Register timeout callback in case the rekey does not go through. */
5417 proto_ctx->timeout_task =
5418 silc_schedule_task_add(server->schedule, sock->sock,
5419 silc_server_rekey_timeout,
5421 server->config->key_exchange_timeout, 0,
5425 /* Run the protocol */
5426 silc_protocol_execute(protocol, server->schedule, 0, 0);
5429 /* The final callback for the REKEY protocol. This will actually take the
5430 new key material into use. */
5432 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5434 SilcProtocol protocol = (SilcProtocol)context;
5435 SilcServerRekeyInternalContext *ctx =
5436 (SilcServerRekeyInternalContext *)protocol->context;
5437 SilcServer server = (SilcServer)ctx->server;
5438 SilcSocketConnection sock = ctx->sock;
5439 SilcIDListData idata = (SilcIDListData)sock->user_data;
5441 if (ctx->timeout_task)
5442 silc_schedule_task_del(server->schedule, ctx->timeout_task);
5444 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5445 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5446 /* Error occured during protocol */
5447 SILC_LOG_ERROR(("Error occurred during rekey protocol with "
5448 "%s (%s)", sock->hostname, sock->ip));
5449 silc_protocol_cancel(protocol, server->schedule);
5450 silc_protocol_free(protocol);
5451 sock->protocol = NULL;
5453 silc_packet_context_free(ctx->packet);
5455 silc_ske_free(ctx->ske);
5456 silc_socket_free(sock);
5458 silc_server_disconnect_remote(server, sock,
5459 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
5462 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
5463 silc_server_create_connections(server);
5467 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
5468 sock->hostname, sock->port,
5469 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
5470 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
5471 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
5474 /* Purge the outgoing data queue to assure that all rekey packets really
5475 go to the network before we quit the protocol. */
5476 silc_server_packet_queue_purge(server, sock);
5478 /* Re-register re-key timeout */
5479 if (ctx->responder == FALSE)
5480 silc_schedule_task_add(server->schedule, sock->sock,
5481 silc_server_rekey_callback,
5482 sock, idata->rekey->timeout, 0,
5483 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5486 silc_protocol_free(protocol);
5487 sock->protocol = NULL;
5489 silc_packet_context_free(ctx->packet);
5491 silc_ske_free(ctx->ske);
5492 silc_socket_free(sock);
5496 /* Task callback used to retrieve network statistical information from
5497 router server once in a while. */
5499 SILC_TASK_CALLBACK(silc_server_get_stats)
5501 SilcServer server = (SilcServer)context;
5502 SilcBuffer idp, packet;
5504 if (!server->standalone) {
5505 SILC_LOG_DEBUG(("Retrieving stats from router"));
5506 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5507 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5508 ++server->cmd_ident, 1,
5509 1, idp->data, idp->len);
5510 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5511 SILC_PACKET_COMMAND, 0, packet->data,
5512 packet->len, FALSE);
5513 silc_buffer_free(packet);
5514 silc_buffer_free(idp);
5517 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5518 server, 120, 0, SILC_TASK_TIMEOUT,