5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 * This is the actual SILC server than handles everything relating to
21 * servicing the SILC connections. This is also a SILC router as a router
22 * is also normal server.
26 #include "serverincludes.h"
27 #include "server_internal.h"
29 /* Static prototypes */
30 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_get_stats);
48 /* Allocates a new SILC server object. This has to be done before the server
49 can be used. After allocation one must call silc_server_init to initialize
50 the server. The new allocated server object is returned to the new_server
53 int silc_server_alloc(SilcServer *new_server)
57 SILC_LOG_DEBUG(("Allocating new server object"));
59 server = silc_calloc(1, sizeof(*server));
60 server->server_type = SILC_SERVER;
61 server->standalone = TRUE;
62 server->local_list = silc_calloc(1, sizeof(*server->local_list));
63 server->global_list = silc_calloc(1, sizeof(*server->global_list));
64 server->pending_commands = silc_dlist_init();
66 server->sim = silc_dlist_init();
74 /* Free's the SILC server object. This is called at the very end before
77 void silc_server_free(SilcServer server)
80 SilcIDCacheEntry cache;
88 silc_dlist_start(server->sim);
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
94 silc_dlist_uninit(server->sim);
98 silc_server_backup_free(server);
99 silc_server_config_unref(&server->config_ref);
101 silc_rng_free(server->rng);
103 silc_pkcs_free(server->pkcs);
104 if (server->public_key)
105 silc_pkcs_public_key_free(server->public_key);
106 if (server->private_key)
107 silc_pkcs_private_key_free(server->private_key);
108 if (server->pending_commands)
109 silc_dlist_uninit(server->pending_commands);
110 if (server->id_entry)
111 silc_idlist_del_server(server->local_list, server->id_entry);
113 /* Delete all channels */
115 if (silc_idcache_get_all(server->local_list->channels, &list) &&
116 silc_idcache_list_first(list, &cache)) {
117 silc_idlist_del_channel(server->local_list, cache->context);
118 while (silc_idcache_list_next(list, &cache))
119 silc_idlist_del_channel(server->local_list, cache->context);
122 silc_idcache_list_free(list);
124 if (silc_idcache_get_all(server->global_list->channels, &list) &&
125 silc_idcache_list_first(list, &cache)) {
126 silc_idlist_del_channel(server->global_list, cache->context);
127 while (silc_idcache_list_next(list, &cache))
128 silc_idlist_del_channel(server->global_list, cache->context);
131 silc_idcache_list_free(list);
133 /* Delete all clients */
135 if (silc_idcache_get_all(server->local_list->clients, &list) &&
136 silc_idcache_list_first(list, &cache)) {
137 silc_idlist_del_client(server->local_list, cache->context);
138 while (silc_idcache_list_next(list, &cache))
139 silc_idlist_del_client(server->local_list, cache->context);
142 silc_idcache_list_free(list);
144 if (silc_idcache_get_all(server->global_list->clients, &list) &&
145 silc_idcache_list_first(list, &cache)) {
146 silc_idlist_del_client(server->global_list, cache->context);
147 while (silc_idcache_list_next(list, &cache))
148 silc_idlist_del_client(server->global_list, cache->context);
151 silc_idcache_list_free(list);
153 /* Delete all servers */
155 if (silc_idcache_get_all(server->local_list->servers, &list) &&
156 silc_idcache_list_first(list, &cache)) {
157 silc_idlist_del_server(server->local_list, cache->context);
158 while (silc_idcache_list_next(list, &cache))
159 silc_idlist_del_server(server->local_list, cache->context);
162 silc_idcache_list_free(list);
164 if (silc_idcache_get_all(server->global_list->servers, &list) &&
165 silc_idcache_list_first(list, &cache)) {
166 silc_idlist_del_server(server->global_list, cache->context);
167 while (silc_idcache_list_next(list, &cache))
168 silc_idlist_del_server(server->global_list, cache->context);
171 silc_idcache_list_free(list);
173 silc_idcache_free(server->local_list->clients);
174 silc_idcache_free(server->local_list->servers);
175 silc_idcache_free(server->local_list->channels);
176 silc_idcache_free(server->global_list->clients);
177 silc_idcache_free(server->global_list->servers);
178 silc_idcache_free(server->global_list->channels);
179 silc_hash_table_free(server->watcher_list);
181 silc_hash_free(server->md5hash);
182 silc_hash_free(server->sha1hash);
183 silc_hmac_unregister_all();
184 silc_hash_unregister_all();
185 silc_cipher_unregister_all();
186 silc_pkcs_unregister_all();
188 silc_free(server->local_list);
189 silc_free(server->global_list);
190 silc_free(server->server_name);
191 silc_free(server->id_string);
192 silc_free(server->purge_i);
193 silc_free(server->purge_g);
197 /* Creates a new server listener. */
199 static bool silc_server_listen(SilcServer server, const char *server_ip,
200 SilcUInt16 port, int *sock)
202 *sock = silc_net_create_server(port, server_ip);
204 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
211 /* Adds a secondary listener. */
213 bool silc_server_init_secondary(SilcServer server)
215 int sock = 0, sock_list[server->config->param.connections_max];
216 SilcSocketConnection newsocket = NULL;
217 SilcServerConfigServerInfoInterface *interface;
219 for (interface = server->config->server_info->secondary; interface;
220 interface = interface->next, sock++) {
222 if (!silc_server_listen(server,
223 interface->server_ip, interface->port, &sock_list[sock]))
226 /* Set socket to non-blocking mode */
227 silc_net_set_socket_nonblock(sock_list[sock]);
229 /* Add ourselves also to the socket table. The entry allocated above
230 is sent as argument for fast referencing in the future. */
231 silc_socket_alloc(sock_list[sock],
232 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
233 server->sockets[sock_list[sock]] = newsocket;
234 SILC_SET_LISTENER(newsocket);
236 /* Perform name and address lookups to resolve the listenning address
238 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
240 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
242 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
243 newsocket->hostname ? newsocket->hostname :
244 newsocket->ip ? newsocket->ip : ""));
245 server->stat.conn_failures++;
248 if (!newsocket->hostname)
249 newsocket->hostname = strdup(newsocket->ip);
251 newsocket->port = silc_net_get_local_port(sock);
253 newsocket->user_data = (void *)server->id_entry;
254 silc_schedule_task_add(server->schedule, sock_list[sock],
255 silc_server_accept_new_connection,
256 (void *)server, 0, 0,
258 SILC_TASK_PRI_NORMAL);
264 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
268 /* Initializes the entire SILC server. This is called always before running
269 the server. This is called only once at the initialization of the program.
270 This binds the server to its listenning port. After this function returns
271 one should call silc_server_run to start the server. This returns TRUE
272 when everything is ok to run the server. Configuration file must be
273 read and parsed before calling this. */
275 bool silc_server_init(SilcServer server)
279 SilcServerEntry id_entry;
280 SilcIDListPurge purge;
281 SilcSocketConnection newsocket = NULL;
283 SILC_LOG_DEBUG(("Initializing server"));
285 server->starttime = time(NULL);
287 /* Take config object for us */
288 silc_server_config_ref(&server->config_ref, server->config,
291 /* Steal public and private key from the config object */
292 server->public_key = server->config->server_info->public_key;
293 server->private_key = server->config->server_info->private_key;
294 server->config->server_info->public_key = NULL;
295 server->config->server_info->private_key = NULL;
297 /* Register all configured ciphers, PKCS and hash functions. */
298 if (!silc_server_config_register_ciphers(server))
299 silc_cipher_register_default();
300 if (!silc_server_config_register_pkcs(server))
301 silc_pkcs_register_default();
302 if (!silc_server_config_register_hashfuncs(server))
303 silc_hash_register_default();
304 if (!silc_server_config_register_hmacs(server))
305 silc_hmac_register_default();
307 /* Initialize random number generator for the server. */
308 server->rng = silc_rng_alloc();
309 silc_rng_init(server->rng);
310 silc_rng_global_init(server->rng);
312 /* Initialize hash functions for server to use */
313 silc_hash_alloc("md5", &server->md5hash);
314 silc_hash_alloc("sha1", &server->sha1hash);
316 /* Allocate PKCS context for local public and private keys */
317 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
319 silc_pkcs_public_key_set(server->pkcs, server->public_key);
320 silc_pkcs_private_key_set(server->pkcs, server->private_key);
322 /* Initialize the scheduler */
323 server->schedule = silc_schedule_init(server->config->param.connections_max,
325 if (!server->schedule)
328 /* First, register log files configuration for error output */
329 silc_server_config_setlogfiles(server);
331 /* Initialize ID caches */
332 server->local_list->clients =
333 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
334 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
335 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
337 /* These are allocated for normal server as well as these hold some
338 global information that the server has fetched from its router. For
339 router these are used as they are supposed to be used on router. */
340 server->global_list->clients =
341 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
342 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
343 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
345 /* Init watcher list */
346 server->watcher_list =
347 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
348 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
350 if (!server->watcher_list)
353 /* Create a listening server */
354 if (!silc_server_listen(server,
355 server->config->server_info->primary == NULL ? NULL :
356 server->config->server_info->primary->server_ip,
357 server->config->server_info->primary == NULL ? 0 :
358 server->config->server_info->primary->port,
362 /* Set socket to non-blocking mode */
363 silc_net_set_socket_nonblock(sock);
366 /* Allocate the entire socket list that is used in server. Eventually
367 all connections will have entry in this table (it is a table of
368 pointers to the actual object that is allocated individually
370 server->sockets = silc_calloc(server->config->param.connections_max,
371 sizeof(*server->sockets));
372 if (!server->sockets)
375 /* Add ourselves also to the socket table. The entry allocated above
376 is sent as argument for fast referencing in the future. */
377 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
378 server->sockets[sock] = newsocket;
379 SILC_SET_LISTENER(newsocket);
381 /* Perform name and address lookups to resolve the listenning address
383 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
385 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
387 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
388 newsocket->hostname ? newsocket->hostname :
389 newsocket->ip ? newsocket->ip : ""));
390 server->stat.conn_failures++;
393 if (!newsocket->hostname)
394 newsocket->hostname = strdup(newsocket->ip);
396 newsocket->port = silc_net_get_local_port(sock);
398 /* Create a Server ID for the server. */
399 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
404 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
405 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
406 server->server_name = server->config->server_info->server_name;
407 server->config->server_info->server_name = NULL;
409 /* Add ourselves to the server list. We don't have a router yet
410 beacuse we haven't established a route yet. It will be done later.
411 For now, NULL is sent as router. This allocates new entry to
414 silc_idlist_add_server(server->local_list, strdup(server->server_name),
415 server->server_type, server->id, NULL, NULL);
417 SILC_LOG_ERROR(("Could not add ourselves to cache"));
420 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
422 /* Put the allocated socket pointer also to the entry allocated above
423 for fast back-referencing to the socket list. */
424 newsocket->user_data = (void *)id_entry;
425 id_entry->connection = (void *)newsocket;
426 server->id_entry = id_entry;
428 /* Register protocols */
429 silc_server_protocols_register();
431 /* Add the first task to the scheduler. This is task that is executed by
432 timeout. It expires as soon as the caller calls silc_server_run. This
433 task performs authentication protocol and key exchange with our
435 silc_schedule_task_add(server->schedule, 0,
436 silc_server_connect_to_router,
437 (void *)server, 0, 1,
439 SILC_TASK_PRI_NORMAL);
441 /* Add listener task to the scheduler. This task receives new connections
442 to the server. This task remains on the queue until the end of the
444 silc_schedule_task_add(server->schedule, sock,
445 silc_server_accept_new_connection,
446 (void *)server, 0, 0,
448 SILC_TASK_PRI_NORMAL);
450 if (silc_server_init_secondary(server) == FALSE)
453 server->listenning = TRUE;
455 /* If server connections has been configured then we must be router as
456 normal server cannot have server connections, only router connections. */
457 if (server->config->servers) {
458 SilcServerConfigServer *ptr = server->config->servers;
460 server->server_type = SILC_ROUTER;
462 if (ptr->backup_router) {
463 server->server_type = SILC_BACKUP_ROUTER;
464 server->backup_router = TRUE;
465 server->id_entry->server_type = SILC_BACKUP_ROUTER;
472 /* Register the ID Cache purge task. This periodically purges the ID cache
473 and removes the expired cache entries. */
475 /* Clients local list */
476 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
477 purge->cache = server->local_list->clients;
478 purge->timeout = 600;
479 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
480 (void *)purge, purge->timeout, 0,
481 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
483 /* Clients global list */
484 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
485 purge->cache = server->global_list->clients;
486 purge->timeout = 300;
487 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
488 (void *)purge, purge->timeout, 0,
489 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
491 /* If we are normal server we'll retrieve network statisticial information
492 once in a while from the router. */
493 if (server->server_type != SILC_ROUTER)
494 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
495 server, 10, 0, SILC_TASK_TIMEOUT,
498 if (server->server_type == SILC_ROUTER)
499 server->stat.routers++;
501 SILC_LOG_DEBUG(("Server initialized"));
503 /* We are done here, return succesfully */
507 silc_server_config_unref(&server->config_ref);
508 silc_net_close_server(sock);
512 /* Task callback to close a socket connection after rehash */
514 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
516 SilcServer server = context;
517 SilcSocketConnection sock = server->sockets[fd];
522 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
523 sock->hostname, sock->port,
524 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
525 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
526 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
528 silc_schedule_task_del_by_context(server->schedule, sock);
529 silc_server_disconnect_remote(server, sock,
530 SILC_STATUS_ERR_BANNED_FROM_SERVER,
531 "This connection is removed from "
534 silc_server_free_sock_user_data(server, sock, NULL);
537 /* This function basically reads the config file again and switches the config
538 object pointed by the server object. After that, we have to fix various
539 things such as the server_name and the listening ports.
540 Keep in mind that we no longer have the root privileges at this point. */
542 bool silc_server_rehash(SilcServer server)
544 SilcServerConfig newconfig;
546 SILC_LOG_INFO(("Rehashing server"));
548 /* Reset the logging system */
549 silc_log_quick = TRUE;
550 silc_log_flush_all();
552 /* Start the main rehash phase (read again the config file) */
553 newconfig = silc_server_config_alloc(server->config_file);
555 SILC_LOG_ERROR(("Rehash FAILED."));
559 /* Reinit scheduler if necessary */
560 if (newconfig->param.connections_max > server->config->param.connections_max)
561 if (!silc_schedule_reinit(server->schedule,
562 newconfig->param.connections_max))
565 /* Fix the server_name field */
566 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
567 silc_free(server->server_name);
568 server->server_name = newconfig->server_info->server_name;
569 newconfig->server_info->server_name = NULL;
571 /* Update the idcache list with a fresh pointer */
572 silc_free(server->id_entry->server_name);
573 server->id_entry->server_name = strdup(server->server_name);
574 if (!silc_idcache_del_by_context(server->local_list->servers,
577 if (!silc_idcache_add(server->local_list->servers,
578 server->id_entry->server_name,
579 server->id_entry->id, server->id_entry, 0, NULL))
584 silc_server_config_setlogfiles(server);
586 /* Change new key pair if necessary */
587 if (newconfig->server_info->public_key &&
588 !silc_pkcs_public_key_compare(server->public_key,
589 newconfig->server_info->public_key)) {
590 silc_pkcs_public_key_free(server->public_key);
591 silc_pkcs_private_key_free(server->private_key);
592 server->public_key = newconfig->server_info->public_key;
593 server->private_key = newconfig->server_info->private_key;
594 newconfig->server_info->public_key = NULL;
595 newconfig->server_info->private_key = NULL;
597 /* Allocate PKCS context for local public and private keys */
598 silc_pkcs_free(server->pkcs);
599 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
601 silc_pkcs_public_key_set(server->pkcs, server->public_key);
602 silc_pkcs_private_key_set(server->pkcs, server->private_key);
605 /* Check for unconfigured server and router connections and close
606 connections that were unconfigured. */
608 if (server->config->routers) {
609 SilcServerConfigRouter *ptr;
610 SilcServerConfigRouter *newptr;
613 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
616 /* Check whether new config has this one too */
617 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
618 if (silc_string_compare(newptr->host, ptr->host) &&
619 newptr->port == ptr->port &&
620 newptr->initiator == ptr->initiator) {
626 if (!found && ptr->host) {
627 /* Remove this connection */
628 SilcSocketConnection sock;
629 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
630 ptr->host, ptr->port);
631 if (sock && !SILC_IS_LISTENER(sock))
632 silc_schedule_task_add(server->schedule, sock->sock,
633 silc_server_rehash_close_connection,
634 server, 0, 1, SILC_TASK_TIMEOUT,
635 SILC_TASK_PRI_NORMAL);
640 if (server->config->servers) {
641 SilcServerConfigServer *ptr;
642 SilcServerConfigServer *newptr;
645 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
648 /* Check whether new config has this one too */
649 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
650 if (silc_string_compare(newptr->host, ptr->host)) {
656 if (!found && ptr->host) {
657 /* Remove this connection */
658 SilcSocketConnection sock;
659 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
661 if (sock && !SILC_IS_LISTENER(sock))
662 silc_schedule_task_add(server->schedule, sock->sock,
663 silc_server_rehash_close_connection,
664 server, 0, 1, SILC_TASK_TIMEOUT,
665 SILC_TASK_PRI_NORMAL);
670 if (server->config->clients) {
671 SilcServerConfigClient *ptr;
672 SilcServerConfigClient *newptr;
675 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
678 /* Check whether new config has this one too */
679 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
680 if (silc_string_compare(newptr->host, ptr->host)) {
686 if (!found && ptr->host) {
687 /* Remove this connection */
688 SilcSocketConnection sock;
689 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
692 silc_schedule_task_add(server->schedule, sock->sock,
693 silc_server_rehash_close_connection,
694 server, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
700 /* Go through all configured routers after rehash */
701 silc_schedule_task_add(server->schedule, 0,
702 silc_server_connect_to_router,
703 (void *)server, 0, 1,
705 SILC_TASK_PRI_NORMAL);
707 /* Check whether our router status has changed */
708 if (newconfig->servers) {
709 SilcServerConfigServer *ptr = newconfig->servers;
711 server->server_type = SILC_ROUTER;
713 if (ptr->backup_router) {
714 server->server_type = SILC_BACKUP_ROUTER;
715 server->backup_router = TRUE;
716 server->id_entry->server_type = SILC_BACKUP_ROUTER;
723 /* Our old config is gone now. We'll unreference our reference made in
724 silc_server_init and then destroy it since we are destroying it
725 underneath the application (layer which called silc_server_init). */
726 silc_server_config_unref(&server->config_ref);
727 silc_server_config_destroy(server->config);
729 /* Take new config context */
730 server->config = newconfig;
731 silc_server_config_ref(&server->config_ref, server->config, server->config);
733 SILC_LOG_DEBUG(("Server rehashed"));
738 /* The heart of the server. This runs the scheduler thus runs the server.
739 When this returns the server has been stopped and the program will
742 void silc_server_run(SilcServer server)
744 SILC_LOG_INFO(("SILC Server started"));
746 /* Start the scheduler, the heart of the SILC server. When this returns
747 the program will be terminated. */
748 silc_schedule(server->schedule);
751 /* Stops the SILC server. This function is used to shutdown the server.
752 This is usually called after the scheduler has returned. After stopping
753 the server one should call silc_server_free. */
755 void silc_server_stop(SilcServer server)
757 SILC_LOG_INFO(("SILC Server shutting down"));
759 if (server->schedule) {
762 server->server_shutdown = TRUE;
764 /* Close all connections */
765 for (i = 0; i < server->config->param.connections_max; i++) {
766 if (!server->sockets[i])
768 if (!SILC_IS_LISTENER(server->sockets[i])) {
769 SilcSocketConnection sock = server->sockets[i];
770 SilcIDListData idata = sock->user_data;
773 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
775 silc_schedule_task_del_by_context(server->schedule,
777 silc_server_disconnect_remote(server, server->sockets[i],
779 "Server is shutting down");
781 silc_server_free_sock_user_data(server, sock,
782 "Server is shutting down");
783 silc_socket_free(sock);
785 silc_socket_free(server->sockets[i]);
786 server->sockets[i] = NULL;
790 /* We are not connected to network anymore */
791 server->standalone = TRUE;
793 silc_schedule_stop(server->schedule);
794 silc_schedule_uninit(server->schedule);
795 server->schedule = NULL;
797 silc_free(server->sockets);
798 server->sockets = NULL;
801 silc_server_protocols_unregister();
803 SILC_LOG_DEBUG(("Server stopped"));
806 /* Function that is called when the network connection to a router has
807 been established. This will continue with the key exchange protocol
808 with the remote router. */
810 void silc_server_start_key_exchange(SilcServer server,
811 SilcServerConnection sconn,
814 SilcSocketConnection newsocket;
815 SilcProtocol protocol;
816 SilcServerKEInternalContext *proto_ctx;
817 SilcServerConfigRouter *conn =
818 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
821 /* Cancel any possible retry timeouts */
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Set socket options */
826 silc_net_set_socket_nonblock(sock);
827 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
829 /* Create socket connection for the connection. Even though we
830 know that we are connecting to a router we will mark the socket
831 to be unknown connection until we have executed authentication
833 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
834 server->sockets[sock] = newsocket;
835 newsocket->hostname = strdup(sconn->remote_host);
836 newsocket->ip = strdup(sconn->remote_host);
837 newsocket->port = sconn->remote_port;
838 sconn->sock = newsocket;
840 /* Allocate internal protocol context. This is sent as context
842 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
843 proto_ctx->server = (void *)server;
844 proto_ctx->context = (void *)sconn;
845 proto_ctx->sock = newsocket;
846 proto_ctx->rng = server->rng;
847 proto_ctx->responder = FALSE;
849 /* Set Key Exchange flags from configuration, but fall back to global
851 SILC_GET_SKE_FLAGS(conn, proto_ctx);
852 if (server->config->param.key_exchange_pfs)
853 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
855 /* Perform key exchange protocol. silc_server_connect_to_router_second
856 will be called after the protocol is finished. */
857 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
858 &protocol, proto_ctx,
859 silc_server_connect_to_router_second);
860 newsocket->protocol = protocol;
862 /* Register a timeout task that will be executed if the protocol
863 is not executed within set limit. */
864 proto_ctx->timeout_task =
865 silc_schedule_task_add(server->schedule, sock,
866 silc_server_timeout_remote,
867 server, server->config->key_exchange_timeout, 0,
871 /* Register the connection for network input and output. This sets
872 that scheduler will listen for incoming packets for this connection
873 and sets that outgoing packets may be sent to this connection as
874 well. However, this doesn't set the scheduler for outgoing traffic,
875 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
876 later when outgoing data is available. */
877 context = (void *)server;
878 SILC_REGISTER_CONNECTION_FOR_IO(sock);
880 /* Run the protocol */
881 silc_protocol_execute(protocol, server->schedule, 0, 0);
884 /* Timeout callback that will be called to retry connecting to remote
885 router. This is used by both normal and router server. This will wait
886 before retrying the connecting. The timeout is generated by exponential
887 backoff algorithm. */
889 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
891 SilcServer server = app_context;
892 SilcServerConnection sconn = (SilcServerConnection)context;
893 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
894 SilcServerConfigConnParams *param =
895 (conn->param ? conn->param : &server->config->param);
897 /* Don't retry if we are shutting down. */
898 if (server->server_shutdown) {
899 silc_server_config_unref(&sconn->conn);
900 silc_free(sconn->remote_host);
901 silc_free(sconn->backup_replace_ip);
906 SILC_LOG_INFO(("Retrying connecting to a router"));
908 /* Calculate next timeout */
909 if (sconn->retry_count >= 1) {
910 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
911 if (sconn->retry_timeout > param->reconnect_interval_max)
912 sconn->retry_timeout = param->reconnect_interval_max;
914 sconn->retry_timeout = param->reconnect_interval;
916 sconn->retry_count++;
917 sconn->retry_timeout = sconn->retry_timeout +
918 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
920 /* If we've reached max retry count, give up. */
921 if ((sconn->retry_count > param->reconnect_count) &&
922 !param->reconnect_keep_trying) {
923 SILC_LOG_ERROR(("Could not connect to router, giving up"));
924 silc_server_config_unref(&sconn->conn);
925 silc_free(sconn->remote_host);
926 silc_free(sconn->backup_replace_ip);
931 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
932 sconn->retry_timeout));
934 /* We will lookup a fresh pointer later */
935 silc_server_config_unref(&sconn->conn);
937 /* Wait one before retrying */
938 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
939 context, sconn->retry_timeout, 0,
940 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
943 /* Generic routine to use connect to a router. */
945 SILC_TASK_CALLBACK(silc_server_connect_router)
947 SilcServer server = app_context;
948 SilcServerConnection sconn = (SilcServerConnection)context;
949 SilcServerConfigRouter *rconn;
952 /* Don't connect if we are shutting down. */
953 if (server->server_shutdown) {
954 silc_free(sconn->remote_host);
955 silc_free(sconn->backup_replace_ip);
960 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
961 (sconn->backup ? "backup router" : "router"),
962 sconn->remote_host, sconn->remote_port));
964 server->router_connect = time(NULL);
965 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
968 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
969 (sconn->backup ? "backup router" : "router"),
970 sconn->remote_host, sconn->remote_port));
971 silc_free(sconn->remote_host);
972 silc_free(sconn->backup_replace_ip);
976 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
978 /* Connect to remote host */
979 sock = silc_net_create_connection(
980 (!server->config->server_info->primary ? NULL :
981 server->config->server_info->primary->server_ip),
982 sconn->remote_port, sconn->remote_host);
984 SILC_LOG_ERROR(("Could not connect to router %s:%d",
985 sconn->remote_host, sconn->remote_port));
986 if (!sconn->no_reconnect)
987 silc_schedule_task_add(server->schedule, 0,
988 silc_server_connect_to_router_retry,
989 context, 0, 1, SILC_TASK_TIMEOUT,
990 SILC_TASK_PRI_NORMAL);
992 silc_server_config_unref(&sconn->conn);
993 silc_free(sconn->remote_host);
994 silc_free(sconn->backup_replace_ip);
1000 /* Continue with key exchange protocol */
1001 silc_server_start_key_exchange(server, sconn, sock);
1004 /* This function connects to our primary router or if we are a router this
1005 establishes all our primary routes. This is called at the start of the
1006 server to do authentication and key exchange with our router - called
1009 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1011 SilcServer server = (SilcServer)context;
1012 SilcServerConnection sconn;
1013 SilcServerConfigRouter *ptr;
1015 /* Don't connect if we are shutting down. */
1016 if (server->server_shutdown)
1019 SILC_LOG_DEBUG(("We are %s",
1020 (server->server_type == SILC_SERVER ?
1021 "normal server" : server->server_type == SILC_ROUTER ?
1022 "router" : "backup router/normal server")));
1024 if (!server->config->routers) {
1025 /* There wasn't a configured router, we will continue but we don't
1026 have a connection to outside world. We will be standalone server. */
1027 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1028 server->standalone = TRUE;
1032 /* Cancel any possible retry timeouts */
1033 silc_schedule_task_del_by_callback(server->schedule,
1034 silc_server_connect_router);
1035 silc_schedule_task_del_by_callback(server->schedule,
1036 silc_server_connect_to_router_retry);
1038 /* Create the connections to all our routes */
1039 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1041 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1042 ptr->backup_router ? "Backup router" : "Router",
1043 ptr->initiator ? "Initiator" : "Responder",
1044 ptr->host, ptr->port));
1046 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1047 ptr->initiator == FALSE && !server->backup_router &&
1048 !silc_server_config_get_backup_router(server))
1049 server->wait_backup = TRUE;
1051 if (ptr->initiator) {
1052 /* Check whether we are connected to this host already */
1053 if (silc_server_num_sockets_by_remote(server,
1054 silc_net_is_ip(ptr->host) ?
1056 silc_net_is_ip(ptr->host) ?
1057 NULL : ptr->host, ptr->port,
1058 SILC_SOCKET_TYPE_ROUTER)) {
1059 SILC_LOG_DEBUG(("We are already connected to this router"));
1063 /* Allocate connection object for hold connection specific stuff. */
1064 sconn = silc_calloc(1, sizeof(*sconn));
1065 sconn->remote_host = strdup(ptr->host);
1066 sconn->remote_port = ptr->port;
1067 sconn->backup = ptr->backup_router;
1068 if (sconn->backup) {
1069 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1070 sconn->backup_replace_port = ptr->backup_replace_port;
1073 if (!server->router_conn && !sconn->backup)
1074 server->router_conn = sconn;
1076 silc_schedule_task_add(server->schedule, 0,
1077 silc_server_connect_router,
1078 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1079 SILC_TASK_PRI_NORMAL);
1084 /* Second part of connecting to router(s). Key exchange protocol has been
1085 executed and now we will execute authentication protocol. */
1087 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1089 SilcProtocol protocol = (SilcProtocol)context;
1090 SilcServerKEInternalContext *ctx =
1091 (SilcServerKEInternalContext *)protocol->context;
1092 SilcServer server = (SilcServer)ctx->server;
1093 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1094 SilcSocketConnection sock = ctx->sock;
1095 SilcServerConnAuthInternalContext *proto_ctx;
1096 SilcServerConfigRouter *conn = NULL;
1098 SILC_LOG_DEBUG(("Start"));
1100 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1101 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1102 /* Error occured during protocol */
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1105 silc_ske_free_key_material(ctx->keymat);
1107 silc_packet_context_free(ctx->packet);
1109 silc_ske_free(ctx->ske);
1110 silc_free(ctx->dest_id);
1112 silc_schedule_task_del_by_callback(server->schedule,
1113 silc_server_failure_callback);
1114 silc_server_disconnect_remote(server, sock,
1115 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1117 /* Try reconnecting if configuration wants it */
1118 if (!sconn->no_reconnect) {
1119 silc_schedule_task_add(server->schedule, 0,
1120 silc_server_connect_to_router_retry,
1121 sconn, 0, 1, SILC_TASK_TIMEOUT,
1122 SILC_TASK_PRI_NORMAL);
1126 /* Call completion to indicate error */
1127 if (sconn->callback)
1128 (*sconn->callback)(server, NULL, sconn->callback_context);
1130 silc_server_config_unref(&sconn->conn);
1131 silc_free(sconn->remote_host);
1132 silc_free(sconn->backup_replace_ip);
1137 /* We now have the key material as the result of the key exchange
1138 protocol. Take the key material into use. Free the raw key material
1139 as soon as we've set them into use. */
1140 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1141 ctx->sock, ctx->keymat,
1142 ctx->ske->prop->cipher,
1143 ctx->ske->prop->pkcs,
1144 ctx->ske->prop->hash,
1145 ctx->ske->prop->hmac,
1146 ctx->ske->prop->group,
1148 silc_protocol_free(protocol);
1149 sock->protocol = NULL;
1150 silc_ske_free_key_material(ctx->keymat);
1152 silc_packet_context_free(ctx->packet);
1154 silc_ske_free(ctx->ske);
1155 silc_free(ctx->dest_id);
1157 silc_schedule_task_del_by_callback(server->schedule,
1158 silc_server_failure_callback);
1159 silc_server_disconnect_remote(server, sock,
1160 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1162 /* Try reconnecting if configuration wants it */
1163 if (!sconn->no_reconnect) {
1164 silc_schedule_task_add(server->schedule, 0,
1165 silc_server_connect_to_router_retry,
1166 sconn, 0, 1, SILC_TASK_TIMEOUT,
1167 SILC_TASK_PRI_NORMAL);
1171 /* Call completion to indicate error */
1172 if (sconn->callback)
1173 (*sconn->callback)(server, NULL, sconn->callback_context);
1175 silc_server_config_unref(&sconn->conn);
1176 silc_free(sconn->remote_host);
1177 silc_free(sconn->backup_replace_ip);
1181 silc_ske_free_key_material(ctx->keymat);
1183 /* Allocate internal context for the authentication protocol. This
1184 is sent as context for the protocol. */
1185 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1186 proto_ctx->server = (void *)server;
1187 proto_ctx->context = (void *)sconn;
1188 proto_ctx->sock = sock;
1189 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1190 proto_ctx->dest_id_type = ctx->dest_id_type;
1191 proto_ctx->dest_id = ctx->dest_id;
1193 /* Resolve the authentication method used in this connection. Check if
1194 we find a match from user configured connections */
1195 if (!sconn->conn.ref_ptr)
1196 conn = silc_server_config_find_router_conn(server, sock->hostname,
1199 conn = sconn->conn.ref_ptr;
1202 /* Match found. Use the configured authentication method. Take only
1203 the passphrase, since for public key auth we automatically use
1204 our local key pair. */
1205 if (conn->passphrase) {
1206 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1207 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1209 proto_ctx->auth_data = strdup(conn->passphrase);
1210 proto_ctx->auth_data_len = strlen(conn->passphrase);
1211 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1213 } else if (conn->publickeys) {
1214 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1216 proto_ctx->auth_meth = SILC_AUTH_NONE;
1219 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1220 sock->hostname, sock->ip, sock->port));
1221 silc_protocol_free(protocol);
1222 sock->protocol = NULL;
1224 silc_packet_context_free(ctx->packet);
1226 silc_ske_free(ctx->ske);
1227 silc_free(ctx->dest_id);
1229 silc_server_config_unref(&sconn->conn);
1230 silc_free(sconn->remote_host);
1231 silc_free(sconn->backup_replace_ip);
1233 silc_schedule_task_del_by_callback(server->schedule,
1234 silc_server_failure_callback);
1235 silc_server_disconnect_remote(server, sock,
1236 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1240 /* Free old protocol as it is finished now */
1241 silc_protocol_free(protocol);
1243 silc_packet_context_free(ctx->packet);
1245 sock->protocol = NULL;
1247 /* Allocate the authentication protocol. This is allocated here
1248 but we won't start it yet. We will be receiving party of this
1249 protocol thus we will wait that connecting party will make
1250 their first move. */
1251 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1252 &sock->protocol, proto_ctx,
1253 silc_server_connect_to_router_final);
1255 /* Register timeout task. If the protocol is not executed inside
1256 this timelimit the connection will be terminated. */
1257 proto_ctx->timeout_task =
1258 silc_schedule_task_add(server->schedule, sock->sock,
1259 silc_server_timeout_remote,
1261 server->config->conn_auth_timeout, 0,
1265 /* Run the protocol */
1266 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1269 /* Finalizes the connection to router. Registers a server task to the
1270 queue so that we can accept new connections. */
1272 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1274 SilcProtocol protocol = (SilcProtocol)context;
1275 SilcServerConnAuthInternalContext *ctx =
1276 (SilcServerConnAuthInternalContext *)protocol->context;
1277 SilcServer server = (SilcServer)ctx->server;
1278 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1279 SilcSocketConnection sock = ctx->sock;
1280 SilcServerEntry id_entry = NULL;
1282 unsigned char *id_string;
1284 SilcIDListData idata;
1285 SilcServerConfigRouter *conn = NULL;
1286 SilcServerConfigConnParams *param = NULL;
1288 SILC_LOG_DEBUG(("Start"));
1290 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1291 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1292 /* Error occured during protocol */
1293 silc_free(ctx->dest_id);
1294 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1297 /* Try reconnecting if configuration wants it */
1298 if (!sconn->no_reconnect) {
1299 silc_schedule_task_add(server->schedule, 0,
1300 silc_server_connect_to_router_retry,
1301 sconn, 0, 1, SILC_TASK_TIMEOUT,
1302 SILC_TASK_PRI_NORMAL);
1309 /* Add a task to the queue. This task receives new connections to the
1310 server. This task remains on the queue until the end of the program. */
1311 if (!server->listenning && !sconn->backup) {
1312 silc_schedule_task_add(server->schedule, server->sock,
1313 silc_server_accept_new_connection,
1314 (void *)server, 0, 0,
1316 SILC_TASK_PRI_NORMAL);
1317 server->listenning = TRUE;
1320 /* Send NEW_SERVER packet to the router. We will become registered
1321 to the SILC network after sending this packet. */
1322 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1323 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1324 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1325 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1326 silc_buffer_format(packet,
1327 SILC_STR_UI_SHORT(id_len),
1328 SILC_STR_UI_XNSTRING(id_string, id_len),
1329 SILC_STR_UI_SHORT(strlen(server->server_name)),
1330 SILC_STR_UI_XNSTRING(server->server_name,
1331 strlen(server->server_name)),
1334 /* Send the packet */
1335 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1336 packet->data, packet->len, TRUE);
1337 silc_buffer_free(packet);
1338 silc_free(id_string);
1340 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1342 /* Check that we do not have this ID already */
1343 id_entry = silc_idlist_find_server_by_id(server->local_list,
1344 ctx->dest_id, TRUE, NULL);
1346 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1348 id_entry = silc_idlist_find_server_by_id(server->global_list,
1349 ctx->dest_id, TRUE, NULL);
1351 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1354 SILC_LOG_DEBUG(("New server id(%s)",
1355 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1357 /* Add the connected router to global server list. Router is sent
1358 as NULL since it's local to us. */
1359 id_entry = silc_idlist_add_server(server->global_list,
1360 strdup(sock->hostname),
1361 SILC_ROUTER, ctx->dest_id, NULL, sock);
1363 silc_free(ctx->dest_id);
1364 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1365 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1370 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1371 silc_free(sock->user_data);
1372 sock->user_data = (void *)id_entry;
1373 sock->type = SILC_SOCKET_TYPE_ROUTER;
1374 idata = (SilcIDListData)sock->user_data;
1375 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1376 SILC_IDLIST_STATUS_LOCAL);
1378 conn = sconn->conn.ref_ptr;
1379 param = &server->config->param;
1380 if (conn && conn->param)
1381 param = conn->param;
1383 /* Perform keepalive. */
1384 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1385 silc_server_perform_heartbeat,
1388 /* Register re-key timeout */
1389 idata->rekey->timeout = param->key_exchange_rekey;
1390 silc_schedule_task_add(server->schedule, sock->sock,
1391 silc_server_rekey_callback,
1392 (void *)sock, idata->rekey->timeout, 0,
1393 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1395 if (!sconn->backup) {
1396 /* Mark this router our primary router if we're still standalone */
1397 if (server->standalone) {
1398 SILC_LOG_DEBUG(("This connection is our primary router"));
1399 server->id_entry->router = id_entry;
1400 server->router = id_entry;
1401 server->standalone = FALSE;
1403 /* If we are router then announce our possible servers. Backup
1404 router announces also global servers. */
1405 if (server->server_type == SILC_ROUTER)
1406 silc_server_announce_servers(server,
1407 server->backup_router ? TRUE : FALSE,
1408 0, SILC_PRIMARY_ROUTE(server));
1410 /* Announce our clients and channels to the router */
1411 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1412 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1414 /* If we are backup router then this primary router is whom we are
1416 if (server->server_type == SILC_BACKUP_ROUTER)
1417 silc_server_backup_add(server, server->id_entry, sock->ip,
1418 sconn->remote_port, TRUE);
1421 /* Add this server to be our backup router */
1422 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1423 sconn->backup_replace_port, FALSE);
1426 sock->protocol = NULL;
1429 /* Call the completion callback to indicate that we've connected to
1431 if (sconn && sconn->callback)
1432 (*sconn->callback)(server, id_entry, sconn->callback_context);
1434 /* Free the temporary connection data context */
1436 silc_server_config_unref(&sconn->conn);
1437 silc_free(sconn->remote_host);
1438 silc_free(sconn->backup_replace_ip);
1441 if (sconn == server->router_conn)
1442 server->router_conn = NULL;
1445 /* Free the protocol object */
1446 if (sock->protocol == protocol)
1447 sock->protocol = NULL;
1448 silc_protocol_free(protocol);
1450 silc_packet_context_free(ctx->packet);
1452 silc_ske_free(ctx->ske);
1453 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1454 silc_free(ctx->auth_data);
1458 /* Host lookup callback that is called after the incoming connection's
1459 IP and FQDN lookup is performed. This will actually check the acceptance
1460 of the incoming connection and will register the key exchange protocol
1461 for this connection. */
1464 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1467 SilcServerKEInternalContext *proto_ctx =
1468 (SilcServerKEInternalContext *)context;
1469 SilcServer server = (SilcServer)proto_ctx->server;
1470 SilcServerConfigClient *cconfig = NULL;
1471 SilcServerConfigServer *sconfig = NULL;
1472 SilcServerConfigRouter *rconfig = NULL;
1473 SilcServerConfigDeny *deny;
1476 /* Check whether we could resolve both IP and FQDN. */
1477 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1478 server->config->require_reverse_lookup)) {
1479 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1480 sock->hostname ? sock->hostname :
1481 sock->ip ? sock->ip : ""));
1482 server->stat.conn_failures++;
1483 silc_server_disconnect_remote(server, sock,
1484 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1485 "Unknown host or IP");
1486 silc_free(proto_ctx);
1490 /* Register the connection for network input and output. This sets
1491 that scheduler will listen for incoming packets for this connection
1492 and sets that outgoing packets may be sent to this connection as well.
1493 However, this doesn't set the scheduler for outgoing traffic, it
1494 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1495 later when outgoing data is available. */
1496 context = (void *)server;
1497 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1499 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1502 /* Listenning port */
1503 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1504 silc_server_disconnect_remote(server, sock,
1505 SILC_STATUS_ERR_RESOURCE_LIMIT,
1506 "Connection refused");
1507 server->stat.conn_failures++;
1508 silc_free(proto_ctx);
1511 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1513 /* Check whether this connection is denied to connect to us. */
1514 deny = silc_server_config_find_denied(server, sock->ip);
1516 deny = silc_server_config_find_denied(server, sock->hostname);
1518 /* The connection is denied */
1519 SILC_LOG_INFO(("Connection %s (%s) is denied",
1520 sock->hostname, sock->ip));
1521 silc_server_disconnect_remote(server, sock,
1522 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1524 server->stat.conn_failures++;
1525 silc_free(proto_ctx);
1529 /* Check whether we have configured this sort of connection at all. We
1530 have to check all configurations since we don't know what type of
1531 connection this is. */
1532 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1533 cconfig = silc_server_config_find_client(server, sock->hostname);
1534 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1535 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1536 if (server->server_type == SILC_ROUTER) {
1537 if (!(rconfig = silc_server_config_find_router_conn(server,
1538 sock->ip, sock->port)))
1539 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1542 if (!cconfig && !sconfig && !rconfig) {
1543 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1545 silc_server_disconnect_remote(server, sock,
1546 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1547 server->stat.conn_failures++;
1548 silc_free(proto_ctx);
1552 /* The connection is allowed */
1554 /* Set internal context for key exchange protocol. This is
1555 sent as context for the protocol. */
1556 proto_ctx->sock = sock;
1557 proto_ctx->rng = server->rng;
1558 proto_ctx->responder = TRUE;
1559 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1560 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1561 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1563 /* Take flags for key exchange. Since we do not know what type of connection
1564 this is, we go through all found configurations and use the global ones
1565 as well. This will result always into strictest key exchange flags. */
1566 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1567 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1568 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1569 if (server->config->param.key_exchange_pfs)
1570 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1572 /* Prepare the connection for key exchange protocol. We allocate the
1573 protocol but will not start it yet. The connector will be the
1574 initiator of the protocol thus we will wait for initiation from
1575 there before we start the protocol. */
1576 server->stat.auth_attempts++;
1577 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1578 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1579 &sock->protocol, proto_ctx,
1580 silc_server_accept_new_connection_second);
1582 /* Register a timeout task that will be executed if the connector
1583 will not start the key exchange protocol within specified timeout
1584 and the connection will be closed. */
1585 proto_ctx->timeout_task =
1586 silc_schedule_task_add(server->schedule, sock->sock,
1587 silc_server_timeout_remote,
1589 server->config->key_exchange_timeout, 0,
1594 /* Accepts new connections to the server. Accepting new connections are
1595 done in three parts to make it async. */
1597 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1599 SilcServer server = (SilcServer)context;
1600 SilcSocketConnection newsocket;
1601 SilcServerKEInternalContext *proto_ctx;
1604 SILC_LOG_DEBUG(("Accepting new connection"));
1606 server->stat.conn_attempts++;
1608 sock = silc_net_accept_connection(fd);
1610 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1611 server->stat.conn_failures++;
1615 /* Check for maximum allowed connections */
1616 if (sock > server->config->param.connections_max) {
1617 SILC_LOG_ERROR(("Refusing connection, server is full"));
1618 server->stat.conn_failures++;
1619 silc_net_close_connection(sock);
1623 /* Set socket options */
1624 silc_net_set_socket_nonblock(sock);
1625 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1627 /* We don't create a ID yet, since we don't know what type of connection
1628 this is yet. But, we do add the connection to the socket table. */
1629 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1630 server->sockets[sock] = newsocket;
1632 /* Perform asynchronous host lookup. This will lookup the IP and the
1633 FQDN of the remote connection. After the lookup is done the connection
1634 is accepted further. */
1635 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1636 proto_ctx->server = server;
1637 proto_ctx->context = (void *)fd;
1638 silc_socket_host_lookup(newsocket, TRUE,
1639 silc_server_accept_new_connection_lookup,
1640 (void *)proto_ctx, server->schedule);
1643 /* Second part of accepting new connection. Key exchange protocol has been
1644 performed and now it is time to do little connection authentication
1645 protocol to figure out whether this connection is client or server
1646 and whether it has right to access this server (especially server
1647 connections needs to be authenticated). */
1649 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1651 SilcProtocol protocol = (SilcProtocol)context;
1652 SilcServerKEInternalContext *ctx =
1653 (SilcServerKEInternalContext *)protocol->context;
1654 SilcServer server = (SilcServer)ctx->server;
1655 SilcSocketConnection sock = ctx->sock;
1656 SilcServerConnAuthInternalContext *proto_ctx;
1658 SILC_LOG_DEBUG(("Start"));
1660 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1661 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1662 /* Error occured during protocol */
1663 SILC_LOG_DEBUG(("Error key exchange protocol"));
1664 silc_protocol_free(protocol);
1665 sock->protocol = NULL;
1666 silc_ske_free_key_material(ctx->keymat);
1668 silc_packet_context_free(ctx->packet);
1670 silc_ske_free(ctx->ske);
1671 silc_free(ctx->dest_id);
1672 silc_server_config_unref(&ctx->cconfig);
1673 silc_server_config_unref(&ctx->sconfig);
1674 silc_server_config_unref(&ctx->rconfig);
1676 silc_schedule_task_del_by_callback(server->schedule,
1677 silc_server_failure_callback);
1678 silc_server_disconnect_remote(server, sock,
1679 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1681 server->stat.auth_failures++;
1685 /* We now have the key material as the result of the key exchange
1686 protocol. Take the key material into use. Free the raw key material
1687 as soon as we've set them into use. */
1688 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1689 ctx->sock, ctx->keymat,
1690 ctx->ske->prop->cipher,
1691 ctx->ske->prop->pkcs,
1692 ctx->ske->prop->hash,
1693 ctx->ske->prop->hmac,
1694 ctx->ske->prop->group,
1696 SILC_LOG_ERROR(("Error setting key material in use"));
1697 silc_protocol_free(protocol);
1698 sock->protocol = NULL;
1699 silc_ske_free_key_material(ctx->keymat);
1701 silc_packet_context_free(ctx->packet);
1703 silc_ske_free(ctx->ske);
1704 silc_free(ctx->dest_id);
1705 silc_server_config_unref(&ctx->cconfig);
1706 silc_server_config_unref(&ctx->sconfig);
1707 silc_server_config_unref(&ctx->rconfig);
1709 silc_schedule_task_del_by_callback(server->schedule,
1710 silc_server_failure_callback);
1711 silc_server_disconnect_remote(server, sock,
1712 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1713 server->stat.auth_failures++;
1716 silc_ske_free_key_material(ctx->keymat);
1718 /* Allocate internal context for the authentication protocol. This
1719 is sent as context for the protocol. */
1720 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1721 proto_ctx->server = (void *)server;
1722 proto_ctx->sock = sock;
1723 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1724 proto_ctx->responder = TRUE;
1725 proto_ctx->dest_id_type = ctx->dest_id_type;
1726 proto_ctx->dest_id = ctx->dest_id;
1727 proto_ctx->cconfig = ctx->cconfig;
1728 proto_ctx->sconfig = ctx->sconfig;
1729 proto_ctx->rconfig = ctx->rconfig;
1731 /* Free old protocol as it is finished now */
1732 silc_protocol_free(protocol);
1734 silc_packet_context_free(ctx->packet);
1736 sock->protocol = NULL;
1738 /* Allocate the authentication protocol. This is allocated here
1739 but we won't start it yet. We will be receiving party of this
1740 protocol thus we will wait that connecting party will make
1741 their first move. */
1742 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1743 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1744 &sock->protocol, proto_ctx,
1745 silc_server_accept_new_connection_final);
1747 /* Register timeout task. If the protocol is not executed inside
1748 this timelimit the connection will be terminated. */
1749 proto_ctx->timeout_task =
1750 silc_schedule_task_add(server->schedule, sock->sock,
1751 silc_server_timeout_remote,
1753 server->config->conn_auth_timeout, 0,
1758 /* After this is called, server don't wait for backup router anymore.
1759 This gets called automatically even after we have backup router
1760 connection established. */
1762 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1764 SilcServer server = context;
1765 server->wait_backup = FALSE;
1768 /* Final part of accepting new connection. The connection has now
1769 been authenticated and keys has been exchanged. We also know whether
1770 this is client or server connection. */
1772 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1774 SilcProtocol protocol = (SilcProtocol)context;
1775 SilcServerConnAuthInternalContext *ctx =
1776 (SilcServerConnAuthInternalContext *)protocol->context;
1777 SilcServer server = (SilcServer)ctx->server;
1778 SilcSocketConnection sock = ctx->sock;
1779 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1781 SilcServerConfigConnParams *param = &server->config->param;
1783 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1784 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1785 /* Error occured during protocol */
1786 SILC_LOG_DEBUG(("Error during authentication protocol"));
1787 silc_protocol_free(protocol);
1788 sock->protocol = NULL;
1790 silc_packet_context_free(ctx->packet);
1792 silc_ske_free(ctx->ske);
1793 silc_free(ctx->dest_id);
1794 silc_server_config_unref(&ctx->cconfig);
1795 silc_server_config_unref(&ctx->sconfig);
1796 silc_server_config_unref(&ctx->rconfig);
1798 silc_schedule_task_del_by_callback(server->schedule,
1799 silc_server_failure_callback);
1800 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1802 server->stat.auth_failures++;
1806 entry->data.last_receive = time(NULL);
1808 switch (ctx->conn_type) {
1809 case SILC_SOCKET_TYPE_CLIENT:
1811 SilcClientEntry client;
1812 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1814 /* Verify whether this connection is after all allowed to connect */
1815 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1816 &server->config->param,
1817 conn->param, ctx->ske)) {
1818 server->stat.auth_failures++;
1822 /* If we are primary router and we have backup router configured
1823 but it has not connected to use yet, do not accept any other
1825 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1826 !server->backup_router) {
1827 SilcServerConfigRouter *router;
1828 router = silc_server_config_get_backup_router(server);
1829 if (router && strcmp(server->config->server_info->primary->server_ip,
1831 silc_server_find_socket_by_host(server,
1832 SILC_SOCKET_TYPE_SERVER,
1833 router->backup_replace_ip, 0)) {
1834 SILC_LOG_INFO(("Will not accept connections because we do "
1835 "not have backup router connection established"));
1836 silc_server_disconnect_remote(server, sock,
1837 SILC_STATUS_ERR_PERM_DENIED,
1838 "We do not have connection to backup "
1839 "router established, try later");
1840 silc_free(sock->user_data);
1841 server->stat.auth_failures++;
1843 /* From here on, wait 10 seconds for the backup router to appear. */
1844 silc_schedule_task_add(server->schedule, 0,
1845 silc_server_backup_router_wait,
1846 (void *)server, 10, 0,
1847 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1852 SILC_LOG_DEBUG(("Remote host is client"));
1853 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1856 /* Add the client to the client ID cache. The nickname and Client ID
1857 and other information is created after we have received NEW_CLIENT
1858 packet from client. */
1859 client = silc_idlist_add_client(server->local_list,
1860 NULL, NULL, NULL, NULL, NULL, sock, 0);
1862 SILC_LOG_ERROR(("Could not add new client to cache"));
1863 silc_free(sock->user_data);
1864 silc_server_disconnect_remote(server, sock,
1865 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1866 server->stat.auth_failures++;
1869 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1872 server->stat.my_clients++;
1873 server->stat.clients++;
1874 server->stat.cell_clients++;
1876 /* Get connection parameters */
1878 param = conn->param;
1880 if (!param->keepalive_secs)
1881 param->keepalive_secs = server->config->param.keepalive_secs;
1883 if (!param->qos && server->config->param.qos) {
1884 param->qos = server->config->param.qos;
1885 param->qos_rate_limit = server->config->param.qos_rate_limit;
1886 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1887 param->qos_limit_sec = server->config->param.qos_limit_sec;
1888 param->qos_limit_usec = server->config->param.qos_limit_usec;
1891 /* Check if to be anonymous connection */
1892 if (param->anonymous)
1893 client->mode |= SILC_UMODE_ANONYMOUS;
1896 id_entry = (void *)client;
1899 case SILC_SOCKET_TYPE_SERVER:
1900 case SILC_SOCKET_TYPE_ROUTER:
1902 SilcServerEntry new_server;
1903 bool initiator = FALSE;
1904 bool backup_local = FALSE;
1905 bool backup_router = FALSE;
1906 char *backup_replace_ip = NULL;
1907 SilcUInt16 backup_replace_port = 0;
1908 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1909 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1911 /* If we are backup router and this is incoming server connection
1912 and we do not have connection to primary router, do not allow
1914 if (server->server_type == SILC_BACKUP_ROUTER &&
1915 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1916 !SILC_PRIMARY_ROUTE(server)) {
1917 SILC_LOG_INFO(("Will not accept server connection because we do "
1918 "not have primary router connection established"));
1919 silc_server_disconnect_remote(server, sock,
1920 SILC_STATUS_ERR_PERM_DENIED,
1921 "We do not have connection to primary "
1922 "router established, try later");
1923 silc_free(sock->user_data);
1924 server->stat.auth_failures++;
1928 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1929 /* Verify whether this connection is after all allowed to connect */
1930 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1931 &server->config->param,
1932 rconn ? rconn->param : NULL,
1934 silc_free(sock->user_data);
1935 server->stat.auth_failures++;
1941 param = rconn->param;
1943 if (!param->keepalive_secs)
1944 param->keepalive_secs = server->config->param.keepalive_secs;
1946 if (!param->qos && server->config->param.qos) {
1947 param->qos = server->config->param.qos;
1948 param->qos_rate_limit = server->config->param.qos_rate_limit;
1949 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1950 param->qos_limit_sec = server->config->param.qos_limit_sec;
1951 param->qos_limit_usec = server->config->param.qos_limit_usec;
1955 initiator = rconn->initiator;
1956 backup_local = rconn->backup_local;
1957 backup_router = rconn->backup_router;
1958 backup_replace_ip = rconn->backup_replace_ip;
1959 backup_replace_port = rconn->backup_replace_port;
1963 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1964 /* Verify whether this connection is after all allowed to connect */
1965 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1966 &server->config->param,
1967 sconn ? sconn->param : NULL,
1969 silc_free(sock->user_data);
1970 server->stat.auth_failures++;
1975 param = sconn->param;
1977 if (!param->keepalive_secs)
1978 param->keepalive_secs = server->config->param.keepalive_secs;
1980 if (!param->qos && server->config->param.qos) {
1981 param->qos = server->config->param.qos;
1982 param->qos_rate_limit = server->config->param.qos_rate_limit;
1983 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1984 param->qos_limit_sec = server->config->param.qos_limit_sec;
1985 param->qos_limit_usec = server->config->param.qos_limit_usec;
1989 backup_router = sconn->backup_router;
1993 /* If we are primary router and we have backup router configured
1994 but it has not connected to use yet, do not accept any other
1996 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1997 !server->backup_router && !backup_router) {
1998 SilcServerConfigRouter *router;
1999 router = silc_server_config_get_backup_router(server);
2000 if (router && strcmp(server->config->server_info->primary->server_ip,
2002 silc_server_find_socket_by_host(server,
2003 SILC_SOCKET_TYPE_SERVER,
2004 router->backup_replace_ip, 0)) {
2005 SILC_LOG_INFO(("Will not accept connections because we do "
2006 "not have backup router connection established"));
2007 silc_server_disconnect_remote(server, sock,
2008 SILC_STATUS_ERR_PERM_DENIED,
2009 "We do not have connection to backup "
2010 "router established, try later");
2011 silc_free(sock->user_data);
2012 server->stat.auth_failures++;
2014 /* From here on, wait 10 seconds for the backup router to appear. */
2015 silc_schedule_task_add(server->schedule, 0,
2016 silc_server_backup_router_wait,
2017 (void *)server, 10, 0,
2018 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2023 SILC_LOG_DEBUG(("Remote host is %s",
2024 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2025 "server" : (backup_router ?
2026 "backup router" : "router")));
2027 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2028 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2029 "server" : (backup_router ?
2030 "backup router" : "router")));
2032 /* Add the server into server cache. The server name and Server ID
2033 is updated after we have received NEW_SERVER packet from the
2034 server. We mark ourselves as router for this server if we really
2037 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2038 server->local_list : (backup_router ?
2039 server->local_list :
2040 server->global_list)),
2042 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2043 SILC_SERVER : SILC_ROUTER),
2045 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2046 server->id_entry : (backup_router ?
2047 server->id_entry : NULL)),
2050 SILC_LOG_ERROR(("Could not add new server to cache"));
2051 silc_free(sock->user_data);
2052 silc_server_disconnect_remote(server, sock,
2053 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2054 server->stat.auth_failures++;
2057 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2059 id_entry = (void *)new_server;
2061 /* If the incoming connection is router and marked as backup router
2062 then add it to be one of our backups */
2063 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2064 /* Change it back to SERVER type since that's what it really is. */
2066 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2067 new_server->server_type = SILC_BACKUP_ROUTER;
2069 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2070 ("Backup router %s is now online",
2073 /* Remove the backup waiting with timeout */
2074 silc_schedule_task_add(server->schedule, 0,
2075 silc_server_backup_router_wait,
2076 (void *)server, 5, 0,
2077 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2081 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2082 server->stat.my_servers++;
2084 server->stat.my_routers++;
2085 server->stat.routers++;
2087 server->stat.servers++;
2089 /* Check whether this connection is to be our primary router connection
2090 if we do not already have the primary route. */
2091 if (!backup_router &&
2092 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2093 if (silc_server_config_is_primary_route(server) && !initiator)
2096 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2097 server->standalone = FALSE;
2098 if (!server->id_entry->router) {
2099 server->id_entry->router = id_entry;
2100 server->router = id_entry;
2111 sock->type = ctx->conn_type;
2113 /* Add the common data structure to the ID entry. */
2114 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2116 /* Add to sockets internal pointer for fast referencing */
2117 silc_free(sock->user_data);
2118 sock->user_data = id_entry;
2120 /* Connection has been fully established now. Everything is ok. */
2121 SILC_LOG_DEBUG(("New connection authenticated"));
2123 /* Perform keepalive. */
2124 if (param->keepalive_secs)
2125 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2126 silc_server_perform_heartbeat,
2129 /* Perform Quality of Service */
2131 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2132 param->qos_limit_sec, param->qos_limit_usec,
2136 silc_schedule_task_del_by_callback(server->schedule,
2137 silc_server_failure_callback);
2138 silc_protocol_free(protocol);
2140 silc_packet_context_free(ctx->packet);
2142 silc_ske_free(ctx->ske);
2143 silc_free(ctx->dest_id);
2144 silc_server_config_unref(&ctx->cconfig);
2145 silc_server_config_unref(&ctx->sconfig);
2146 silc_server_config_unref(&ctx->rconfig);
2148 sock->protocol = NULL;
2151 /* This function is used to read packets from network and send packets to
2152 network. This is usually a generic task. */
2154 SILC_TASK_CALLBACK(silc_server_packet_process)
2156 SilcServer server = (SilcServer)context;
2157 SilcSocketConnection sock = server->sockets[fd];
2158 SilcIDListData idata;
2159 SilcCipher cipher = NULL;
2160 SilcHmac hmac = NULL;
2161 SilcUInt32 sequence = 0;
2165 SILC_LOG_DEBUG(("Unknown socket connection"));
2169 /* Packet sending */
2171 if (type == SILC_TASK_WRITE) {
2172 /* Do not send data to disconnected connection */
2173 if (SILC_IS_DISCONNECTED(sock)) {
2174 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2178 server->stat.packets_sent++;
2180 /* Send the packet */
2181 ret = silc_packet_send(sock, TRUE);
2183 /* If returned -2 could not write to connection now, will do
2188 /* The packet has been sent and now it is time to set the connection
2189 back to only for input. When there is again some outgoing data
2190 available for this connection it will be set for output as well.
2191 This call clears the output setting and sets it only for input. */
2192 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2193 SILC_UNSET_OUTBUF_PENDING(sock);
2194 silc_buffer_clear(sock->outbuf);
2197 SILC_LOG_ERROR(("Error sending packet to connection "
2198 "%s:%d [%s]", sock->hostname, sock->port,
2199 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2200 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2201 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2204 SILC_SET_DISCONNECTING(sock);
2205 if (sock->user_data)
2206 silc_server_free_sock_user_data(server, sock, NULL);
2207 silc_server_close_connection(server, sock);
2212 /* Packet receiving */
2214 /* Read some data from connection */
2215 ret = silc_packet_receive(sock);
2219 SILC_LOG_ERROR(("Error receiving packet from connection "
2220 "%s:%d [%s] %s", sock->hostname, sock->port,
2221 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2222 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2223 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2224 "Router"), strerror(errno)));
2226 SILC_SET_DISCONNECTING(sock);
2227 if (sock->user_data)
2228 silc_server_free_sock_user_data(server, sock, NULL);
2229 silc_server_close_connection(server, sock);
2236 SILC_LOG_DEBUG(("Read EOF"));
2238 /* If connection is disconnecting already we will finally
2239 close the connection */
2240 if (SILC_IS_DISCONNECTING(sock)) {
2241 if (sock->user_data)
2242 silc_server_free_sock_user_data(server, sock, NULL);
2243 silc_server_close_connection(server, sock);
2247 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2248 SILC_SET_DISCONNECTING(sock);
2250 if (sock->user_data) {
2252 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2253 silc_server_free_sock_user_data(server, sock, tmp);
2255 silc_server_free_sock_user_data(server, sock, NULL);
2256 } else if (server->router_conn && server->router_conn->sock == sock &&
2257 !server->router && server->standalone)
2258 silc_schedule_task_add(server->schedule, 0,
2259 silc_server_connect_to_router,
2262 SILC_TASK_PRI_NORMAL);
2264 silc_server_close_connection(server, sock);
2268 /* If connection is disconnecting or disconnected we will ignore
2270 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2271 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2275 /* Get keys and stuff from ID entry */
2276 idata = (SilcIDListData)sock->user_data;
2278 cipher = idata->receive_key;
2279 hmac = idata->hmac_receive;
2280 sequence = idata->psn_receive;
2283 /* Process the packet. This will call the parser that will then
2284 decrypt and parse the packet. */
2285 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2286 TRUE : FALSE, cipher, hmac, sequence,
2287 silc_server_packet_parse, server);
2289 /* If processing failed the connection is closed. */
2291 /* On packet processing errors we may close our primary router
2292 connection but won't become primary router if we are the backup
2293 since this is local error condition. */
2294 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2295 server->backup_noswitch = TRUE;
2297 if (sock->user_data)
2298 silc_server_free_sock_user_data(server, sock, NULL);
2299 silc_server_close_connection(server, sock);
2303 /* Parses whole packet, received earlier. */
2305 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2307 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2308 SilcServer server = (SilcServer)parse_ctx->context;
2309 SilcSocketConnection sock = parse_ctx->sock;
2310 SilcPacketContext *packet = parse_ctx->packet;
2311 SilcIDListData idata = (SilcIDListData)sock->user_data;
2314 server->stat.packets_received++;
2316 /* Parse the packet */
2317 if (parse_ctx->normal)
2318 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2320 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2322 /* If entry is disabled ignore what we got. */
2323 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2324 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2325 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2326 SILC_LOG_DEBUG(("Connection is disabled"));
2330 if (ret == SILC_PACKET_NONE) {
2331 SILC_LOG_DEBUG(("Error parsing packet"));
2335 /* Check that the the current client ID is same as in the client's packet. */
2336 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2337 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2338 if (client && client->id && packet->src_id) {
2339 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2340 packet->src_id_type);
2341 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2343 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2350 if (server->server_type == SILC_ROUTER) {
2351 /* Route the packet if it is not destined to us. Other ID types but
2352 server are handled separately after processing them. */
2353 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2354 packet->dst_id_type == SILC_ID_SERVER &&
2355 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2356 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2358 /* Route the packet to fastest route for the destination ID */
2359 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2360 packet->dst_id_type);
2363 silc_server_packet_route(server,
2364 silc_server_route_get(server, id,
2365 packet->dst_id_type),
2372 /* Parse the incoming packet type */
2373 silc_server_packet_parse_type(server, sock, packet);
2375 /* Broadcast packet if it is marked as broadcast packet and it is
2376 originated from router and we are router. */
2377 if (server->server_type == SILC_ROUTER &&
2378 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2379 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2380 /* Broadcast to our primary route */
2381 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2383 /* If we have backup routers then we need to feed all broadcast
2384 data to those servers. */
2385 silc_server_backup_broadcast(server, sock, packet);
2389 silc_packet_context_free(packet);
2390 silc_free(parse_ctx);
2393 /* Parser callback called by silc_packet_receive_process. This merely
2394 registers timeout that will handle the actual parsing when appropriate. */
2396 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2399 SilcServer server = (SilcServer)context;
2400 SilcSocketConnection sock = parser_context->sock;
2401 SilcIDListData idata = (SilcIDListData)sock->user_data;
2405 idata->psn_receive = parser_context->packet->sequence + 1;
2407 /* If protocol for this connection is key exchange or rekey then we'll
2408 process all packets synchronously, since there might be packets in
2409 queue that we are not able to decrypt without first processing the
2410 packets before them. */
2411 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2412 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2413 (sock->protocol && sock->protocol->protocol &&
2414 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2415 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2416 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2419 /* Reprocess data since we'll return FALSE here. This is because
2420 the idata->receive_key might have become valid in the last packet
2421 and we want to call this processor with valid cipher. */
2423 ret = silc_packet_receive_process(
2424 sock, server->server_type == SILC_ROUTER ?
2425 TRUE : FALSE, idata->receive_key,
2426 idata->hmac_receive, idata->psn_receive,
2427 silc_server_packet_parse, server);
2429 ret = silc_packet_receive_process(
2430 sock, server->server_type == SILC_ROUTER ?
2431 TRUE : FALSE, NULL, NULL, 0,
2432 silc_server_packet_parse, server);
2435 /* On packet processing errors we may close our primary router
2436 connection but won't become primary router if we are the backup
2437 since this is local error condition. */
2438 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2439 server->backup_noswitch = TRUE;
2441 if (sock->user_data)
2442 silc_server_free_sock_user_data(server, sock, NULL);
2443 silc_server_close_connection(server, sock);
2449 switch (sock->type) {
2450 case SILC_SOCKET_TYPE_UNKNOWN:
2451 case SILC_SOCKET_TYPE_CLIENT:
2452 /* Parse the packet with timeout */
2453 silc_schedule_task_add(server->schedule, sock->sock,
2454 silc_server_packet_parse_real,
2455 (void *)parser_context, 0, 100000,
2457 SILC_TASK_PRI_NORMAL);
2459 case SILC_SOCKET_TYPE_SERVER:
2460 case SILC_SOCKET_TYPE_ROUTER:
2461 /* Packets from servers are parsed immediately */
2462 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2472 /* Parses the packet type and calls what ever routines the packet type
2473 requires. This is done for all incoming packets. */
2475 void silc_server_packet_parse_type(SilcServer server,
2476 SilcSocketConnection sock,
2477 SilcPacketContext *packet)
2479 SilcPacketType type = packet->type;
2480 SilcIDListData idata = (SilcIDListData)sock->user_data;
2482 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2483 silc_get_packet_name(type), packet->flags));
2485 /* Parse the packet type */
2487 case SILC_PACKET_DISCONNECT:
2490 char *message = NULL;
2492 if (packet->flags & SILC_PACKET_FLAG_LIST)
2494 if (packet->buffer->len < 1)
2497 status = (SilcStatus)packet->buffer->data[0];
2498 if (packet->buffer->len > 1 &&
2499 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2500 message = silc_memdup(packet->buffer->data + 1,
2501 packet->buffer->len - 1);
2503 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2504 sock->ip, sock->hostname,
2505 silc_get_status_message(status), status,
2506 message ? message : ""));
2509 /* Handle the disconnection from our end too */
2510 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2511 silc_server_free_sock_user_data(server, sock, NULL);
2512 silc_server_close_connection(server, sock);
2516 case SILC_PACKET_SUCCESS:
2518 * Success received for something. For now we can have only
2519 * one protocol for connection executing at once hence this
2520 * success message is for whatever protocol is executing currently.
2522 if (packet->flags & SILC_PACKET_FLAG_LIST)
2525 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2528 case SILC_PACKET_FAILURE:
2530 * Failure received for something. For now we can have only
2531 * one protocol for connection executing at once hence this
2532 * failure message is for whatever protocol is executing currently.
2534 if (packet->flags & SILC_PACKET_FLAG_LIST)
2536 if (sock->protocol) {
2537 SilcServerFailureContext f;
2538 f = silc_calloc(1, sizeof(*f));
2539 f->sock = silc_socket_dup(sock);
2541 /* We will wait 5 seconds to process this failure packet */
2542 silc_schedule_task_add(server->schedule, sock->sock,
2543 silc_server_failure_callback, (void *)f, 5, 0,
2544 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2548 case SILC_PACKET_REJECT:
2549 if (packet->flags & SILC_PACKET_FLAG_LIST)
2554 case SILC_PACKET_NOTIFY:
2556 * Received notify packet. Server can receive notify packets from
2557 * router. Server then relays the notify messages to clients if needed.
2559 if (packet->flags & SILC_PACKET_FLAG_LIST)
2560 silc_server_notify_list(server, sock, packet);
2562 silc_server_notify(server, sock, packet);
2568 case SILC_PACKET_CHANNEL_MESSAGE:
2570 * Received channel message. Channel messages are special packets
2571 * (although probably most common ones) thus they are handled
2574 if (packet->flags & SILC_PACKET_FLAG_LIST)
2576 idata->last_receive = time(NULL);
2577 silc_server_channel_message(server, sock, packet);
2580 case SILC_PACKET_CHANNEL_KEY:
2582 * Received key for channel. As channels are created by the router
2583 * the keys are as well. We will distribute the key to all of our
2584 * locally connected clients on the particular channel. Router
2585 * never receives this channel and thus is ignored.
2587 if (packet->flags & SILC_PACKET_FLAG_LIST)
2589 silc_server_channel_key(server, sock, packet);
2595 case SILC_PACKET_COMMAND:
2597 * Recived command. Processes the command request and allocates the
2598 * command context and calls the command.
2600 if (packet->flags & SILC_PACKET_FLAG_LIST)
2602 silc_server_command_process(server, sock, packet);
2605 case SILC_PACKET_COMMAND_REPLY:
2607 * Received command reply packet. Received command reply to command. It
2608 * may be reply to command sent by us or reply to command sent by client
2609 * that we've routed further.
2611 if (packet->flags & SILC_PACKET_FLAG_LIST)
2613 silc_server_command_reply(server, sock, packet);
2617 * Private Message packets
2619 case SILC_PACKET_PRIVATE_MESSAGE:
2621 * Received private message packet. The packet is coming from either
2624 if (packet->flags & SILC_PACKET_FLAG_LIST)
2626 idata->last_receive = time(NULL);
2627 silc_server_private_message(server, sock, packet);
2630 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2632 * Private message key packet.
2634 if (packet->flags & SILC_PACKET_FLAG_LIST)
2636 silc_server_private_message_key(server, sock, packet);
2640 * Key Exchange protocol packets
2642 case SILC_PACKET_KEY_EXCHANGE:
2643 if (packet->flags & SILC_PACKET_FLAG_LIST)
2646 if (sock->protocol && sock->protocol->protocol &&
2647 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2648 SilcServerKEInternalContext *proto_ctx =
2649 (SilcServerKEInternalContext *)sock->protocol->context;
2651 proto_ctx->packet = silc_packet_context_dup(packet);
2653 /* Let the protocol handle the packet */
2654 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2656 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2657 "protocol active, packet dropped."));
2661 case SILC_PACKET_KEY_EXCHANGE_1:
2662 if (packet->flags & SILC_PACKET_FLAG_LIST)
2665 if (sock->protocol && sock->protocol->protocol &&
2666 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2667 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2669 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2670 SilcServerRekeyInternalContext *proto_ctx =
2671 (SilcServerRekeyInternalContext *)sock->protocol->context;
2673 if (proto_ctx->packet)
2674 silc_packet_context_free(proto_ctx->packet);
2676 proto_ctx->packet = silc_packet_context_dup(packet);
2678 /* Let the protocol handle the packet */
2679 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2681 SilcServerKEInternalContext *proto_ctx =
2682 (SilcServerKEInternalContext *)sock->protocol->context;
2684 if (proto_ctx->packet)
2685 silc_packet_context_free(proto_ctx->packet);
2687 proto_ctx->packet = silc_packet_context_dup(packet);
2688 proto_ctx->dest_id_type = packet->src_id_type;
2689 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2690 packet->src_id_type);
2691 if (!proto_ctx->dest_id)
2694 /* Let the protocol handle the packet */
2695 silc_protocol_execute(sock->protocol, server->schedule,
2699 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2700 "protocol active, packet dropped."));
2704 case SILC_PACKET_KEY_EXCHANGE_2:
2705 if (packet->flags & SILC_PACKET_FLAG_LIST)
2708 if (sock->protocol && sock->protocol->protocol &&
2709 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2710 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2712 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2713 SilcServerRekeyInternalContext *proto_ctx =
2714 (SilcServerRekeyInternalContext *)sock->protocol->context;
2716 if (proto_ctx->packet)
2717 silc_packet_context_free(proto_ctx->packet);
2719 proto_ctx->packet = silc_packet_context_dup(packet);
2721 /* Let the protocol handle the packet */
2722 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2724 SilcServerKEInternalContext *proto_ctx =
2725 (SilcServerKEInternalContext *)sock->protocol->context;
2727 if (proto_ctx->packet)
2728 silc_packet_context_free(proto_ctx->packet);
2730 proto_ctx->packet = silc_packet_context_dup(packet);
2731 proto_ctx->dest_id_type = packet->src_id_type;
2732 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2733 packet->src_id_type);
2734 if (!proto_ctx->dest_id)
2737 /* Let the protocol handle the packet */
2738 silc_protocol_execute(sock->protocol, server->schedule,
2742 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2743 "protocol active, packet dropped."));
2747 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2749 * Connection authentication request packet. When we receive this packet
2750 * we will send to the other end information about our mandatory
2751 * authentication method for the connection. This packet maybe received
2754 if (packet->flags & SILC_PACKET_FLAG_LIST)
2756 silc_server_connection_auth_request(server, sock, packet);
2760 * Connection Authentication protocol packets
2762 case SILC_PACKET_CONNECTION_AUTH:
2763 /* Start of the authentication protocol. We receive here the
2764 authentication data and will verify it. */
2765 if (packet->flags & SILC_PACKET_FLAG_LIST)
2768 if (sock->protocol && sock->protocol->protocol->type
2769 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2771 SilcServerConnAuthInternalContext *proto_ctx =
2772 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2774 proto_ctx->packet = silc_packet_context_dup(packet);
2776 /* Let the protocol handle the packet */
2777 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2779 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2780 "protocol active, packet dropped."));
2784 case SILC_PACKET_NEW_ID:
2786 * Received New ID packet. This includes some new ID that has been
2787 * created. It may be for client, server or channel. This is the way
2788 * to distribute information about new registered entities in the
2791 if (packet->flags & SILC_PACKET_FLAG_LIST)
2792 silc_server_new_id_list(server, sock, packet);
2794 silc_server_new_id(server, sock, packet);
2797 case SILC_PACKET_NEW_CLIENT:
2799 * Received new client packet. This includes client information that
2800 * we will use to create initial client ID. After creating new
2801 * ID we will send it to the client.
2803 if (packet->flags & SILC_PACKET_FLAG_LIST)
2805 silc_server_new_client(server, sock, packet);
2808 case SILC_PACKET_NEW_SERVER:
2810 * Received new server packet. This includes Server ID and some other
2811 * information that we may save. This is received after server has
2814 if (packet->flags & SILC_PACKET_FLAG_LIST)
2816 silc_server_new_server(server, sock, packet);
2819 case SILC_PACKET_NEW_CHANNEL:
2821 * Received new channel packet. Information about new channel in the
2822 * network are distributed using this packet.
2824 if (packet->flags & SILC_PACKET_FLAG_LIST)
2825 silc_server_new_channel_list(server, sock, packet);
2827 silc_server_new_channel(server, sock, packet);
2830 case SILC_PACKET_HEARTBEAT:
2832 * Received heartbeat.
2834 if (packet->flags & SILC_PACKET_FLAG_LIST)
2838 case SILC_PACKET_KEY_AGREEMENT:
2840 * Received heartbeat.
2842 if (packet->flags & SILC_PACKET_FLAG_LIST)
2844 silc_server_key_agreement(server, sock, packet);
2847 case SILC_PACKET_REKEY:
2849 * Received re-key packet. The sender wants to regenerate the session
2852 if (packet->flags & SILC_PACKET_FLAG_LIST)
2854 silc_server_rekey(server, sock, packet);
2857 case SILC_PACKET_REKEY_DONE:
2859 * The re-key is done.
2861 if (packet->flags & SILC_PACKET_FLAG_LIST)
2864 if (sock->protocol && sock->protocol->protocol &&
2865 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2867 SilcServerRekeyInternalContext *proto_ctx =
2868 (SilcServerRekeyInternalContext *)sock->protocol->context;
2870 if (proto_ctx->packet)
2871 silc_packet_context_free(proto_ctx->packet);
2873 proto_ctx->packet = silc_packet_context_dup(packet);
2875 /* Let the protocol handle the packet */
2876 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2878 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2879 "protocol active, packet dropped."));
2883 case SILC_PACKET_FTP:
2885 if (packet->flags & SILC_PACKET_FLAG_LIST)
2887 silc_server_ftp(server, sock, packet);
2890 case SILC_PACKET_RESUME_CLIENT:
2892 if (packet->flags & SILC_PACKET_FLAG_LIST)
2894 silc_server_resume_client(server, sock, packet);
2897 case SILC_PACKET_RESUME_ROUTER:
2898 /* Resume router packet received. This packet is received for backup
2899 router resuming protocol. */
2900 if (packet->flags & SILC_PACKET_FLAG_LIST)
2902 silc_server_backup_resume_router(server, sock, packet);
2906 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2911 /* Creates connection to a remote router. */
2913 void silc_server_create_connection(SilcServer server,
2914 const char *remote_host, SilcUInt32 port)
2916 SilcServerConnection sconn;
2918 /* Allocate connection object for hold connection specific stuff. */
2919 sconn = silc_calloc(1, sizeof(*sconn));
2920 sconn->remote_host = strdup(remote_host);
2921 sconn->remote_port = port;
2922 sconn->no_reconnect = TRUE;
2924 silc_schedule_task_add(server->schedule, 0,
2925 silc_server_connect_router,
2926 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2927 SILC_TASK_PRI_NORMAL);
2930 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2932 silc_socket_free(context);
2935 /* Closes connection to socket connection */
2937 void silc_server_close_connection(SilcServer server,
2938 SilcSocketConnection sock)
2942 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2943 silc_schedule_task_add(server->schedule, 0,
2944 silc_server_close_connection_final,
2945 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2946 SILC_TASK_PRI_NORMAL);
2950 memset(tmp, 0, sizeof(tmp));
2951 silc_socket_get_error(sock, tmp, sizeof(tmp));
2952 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2954 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2955 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2956 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2957 "Router"), tmp[0] ? tmp : ""));
2959 /* We won't listen for this connection anymore */
2960 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2962 /* Unregister all tasks */
2963 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2965 /* Close the actual connection */
2966 silc_net_close_connection(sock->sock);
2967 server->sockets[sock->sock] = NULL;
2969 /* If sock->user_data is NULL then we'll check for active protocols
2970 here since the silc_server_free_sock_user_data has not been called
2971 for this connection. */
2972 if (!sock->user_data) {
2973 /* If any protocol is active cancel its execution. It will call
2974 the final callback which will finalize the disconnection. */
2975 if (sock->protocol) {
2976 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2977 silc_protocol_cancel(sock->protocol, server->schedule);
2978 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2979 silc_protocol_execute_final(sock->protocol, server->schedule);
2980 sock->protocol = NULL;
2985 silc_schedule_task_add(server->schedule, 0,
2986 silc_server_close_connection_final,
2987 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2988 SILC_TASK_PRI_NORMAL);
2991 /* Sends disconnect message to remote connection and disconnects the
2994 void silc_server_disconnect_remote(SilcServer server,
2995 SilcSocketConnection sock,
2996 SilcStatus status, ...)
2999 unsigned char buf[512];
3004 if (!sock || SILC_IS_DISCONNECTED(sock))
3007 memset(buf, 0, sizeof(buf));
3008 va_start(ap, status);
3009 cp = va_arg(ap, char *);
3011 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3016 SILC_LOG_DEBUG(("Disconnecting remote host"));
3018 /* Notify remote end that the conversation is over. The notify message
3019 is tried to be sent immediately. */
3023 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3025 buffer = silc_buffer_alloc_size(len);
3029 buffer->data[0] = status;
3031 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3033 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3034 buffer->data, buffer->len, TRUE);
3035 silc_buffer_free(buffer);
3038 silc_server_packet_queue_purge(server, sock);
3040 /* Mark the connection to be disconnected */
3041 SILC_SET_DISCONNECTED(sock);
3042 silc_server_close_connection(server, sock);
3045 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3047 SilcServer server = app_context;
3048 SilcClientEntry client = context;
3050 assert(!silc_hash_table_count(client->channels));
3052 silc_idlist_del_data(client);
3053 silc_idcache_purge_by_context(server->local_list->clients, client);
3056 /* Frees client data and notifies about client's signoff. */
3058 void silc_server_free_client_data(SilcServer server,
3059 SilcSocketConnection sock,
3060 SilcClientEntry client,
3062 const char *signoff)
3064 SILC_LOG_DEBUG(("Freeing client data"));
3066 /* If there is pending outgoing data for the client then purge it
3067 to the network before removing the client entry. */
3068 silc_server_packet_queue_purge(server, sock);
3071 /* Check if anyone is watching this nickname */
3072 if (server->server_type == SILC_ROUTER)
3073 silc_server_check_watcher_list(server, client, NULL,
3074 SILC_NOTIFY_TYPE_SIGNOFF);
3076 /* Send SIGNOFF notify to routers. */
3078 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3079 SILC_BROADCAST(server), client->id,
3083 /* Remove client from all channels */
3085 silc_server_remove_from_channels(server, NULL, client,
3086 TRUE, (char *)signoff, TRUE, FALSE);
3088 silc_server_remove_from_channels(server, NULL, client,
3089 FALSE, NULL, FALSE, FALSE);
3091 /* Remove this client from watcher list if it is */
3092 silc_server_del_from_watcher_list(server, client);
3094 /* Update statistics */
3095 server->stat.my_clients--;
3096 server->stat.clients--;
3097 if (server->stat.cell_clients)
3098 server->stat.cell_clients--;
3099 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3100 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3101 silc_schedule_task_del_by_context(server->schedule, client);
3103 /* We will not delete the client entry right away. We will take it
3104 into history (for WHOWAS command) for 5 minutes, unless we're
3105 shutting down server. */
3106 if (!server->server_shutdown) {
3107 silc_schedule_task_add(server->schedule, 0,
3108 silc_server_free_client_data_timeout,
3110 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3111 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3112 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3114 client->router = NULL;
3115 client->connection = NULL;
3117 /* Delete directly since we're shutting down server */
3118 silc_idlist_del_data(client);
3119 silc_idlist_del_client(server->local_list, client);
3123 /* Frees user_data pointer from socket connection object. This also sends
3124 appropriate notify packets to the network to inform about leaving
3127 void silc_server_free_sock_user_data(SilcServer server,
3128 SilcSocketConnection sock,
3129 const char *signoff_message)
3131 switch (sock->type) {
3132 case SILC_SOCKET_TYPE_CLIENT:
3134 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3135 silc_server_free_client_data(server, sock, user_data, TRUE,
3139 case SILC_SOCKET_TYPE_SERVER:
3140 case SILC_SOCKET_TYPE_ROUTER:
3142 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3143 SilcServerEntry backup_router = NULL;
3145 SILC_LOG_DEBUG(("Freeing server data"));
3148 backup_router = silc_server_backup_get(server, user_data->id);
3150 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3151 backup_router == server->id_entry &&
3152 sock->type != SILC_SOCKET_TYPE_ROUTER)
3153 backup_router = NULL;
3155 if (server->server_shutdown || server->backup_noswitch)
3156 backup_router = NULL;
3158 /* If this was our primary router connection then we're lost to
3159 the outside world. */
3160 if (server->router == user_data) {
3161 /* Check whether we have a backup router connection */
3162 if (!backup_router || backup_router == user_data) {
3163 silc_schedule_task_add(server->schedule, 0,
3164 silc_server_connect_to_router,
3167 SILC_TASK_PRI_NORMAL);
3169 server->id_entry->router = NULL;
3170 server->router = NULL;
3171 server->standalone = TRUE;
3172 backup_router = NULL;
3174 if (server->id_entry != backup_router) {
3175 SILC_LOG_INFO(("New primary router is backup router %s",
3176 backup_router->server_name));
3177 server->id_entry->router = backup_router;
3178 server->router = backup_router;
3179 server->router_connect = time(0);
3180 server->backup_primary = TRUE;
3182 SILC_LOG_INFO(("We are now new primary router in this cell"));
3183 server->id_entry->router = NULL;
3184 server->router = NULL;
3185 server->standalone = TRUE;
3187 /* We stop here to take a breath */
3191 if (server->server_type == SILC_BACKUP_ROUTER) {
3192 server->server_type = SILC_ROUTER;
3194 /* We'll need to constantly try to reconnect to the primary
3195 router so that we'll see when it comes back online. */
3196 silc_server_backup_reconnect(server, sock->ip, sock->port,
3197 silc_server_backup_connected,
3201 /* Mark this connection as replaced */
3202 silc_server_backup_replaced_add(server, user_data->id,
3205 } else if (backup_router) {
3206 SILC_LOG_INFO(("Enabling the use of backup router %s",
3207 backup_router->server_name));
3209 /* Mark this connection as replaced */
3210 silc_server_backup_replaced_add(server, user_data->id,
3212 } else if (server->server_type == SILC_SERVER &&
3213 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3214 /* Reconnect to the router (backup) */
3215 silc_schedule_task_add(server->schedule, 0,
3216 silc_server_connect_to_router,
3219 SILC_TASK_PRI_NORMAL);
3222 if (!backup_router) {
3223 /* Remove all servers that are originated from this server, and
3224 remove the clients of those servers too. */
3225 silc_server_remove_servers_by_server(server, user_data, TRUE);
3227 /* Remove the clients that this server owns as they will become
3228 invalid now too. For backup router the server is actually
3229 coming from the primary router, so mark that as the owner
3231 if (server->server_type == SILC_BACKUP_ROUTER &&
3232 sock->type == SILC_SOCKET_TYPE_SERVER)
3233 silc_server_remove_clients_by_server(server, server->router,
3236 silc_server_remove_clients_by_server(server, user_data,
3239 /* Remove channels owned by this server */
3240 if (server->server_type == SILC_SERVER)
3241 silc_server_remove_channels_by_server(server, user_data);
3243 /* Enable local server connections that may be disabled */
3244 silc_server_local_servers_toggle_enabled(server, TRUE);
3246 /* Update the client entries of this server to the new backup
3247 router. If we are the backup router we also resolve the real
3248 servers for the clients. After updating is over this also
3249 removes the clients that this server explicitly owns. */
3250 silc_server_update_clients_by_server(server, user_data,
3251 backup_router, TRUE);
3253 /* If we are router and just lost our primary router (now standlaone)
3254 we remove everything that was behind it, since we don't know
3256 if (server->server_type == SILC_ROUTER && server->standalone)
3257 /* Remove all servers that are originated from this server, and
3258 remove the clients of those servers too. */
3259 silc_server_remove_servers_by_server(server, user_data, TRUE);
3261 /* Finally remove the clients that are explicitly owned by this
3262 server. They go down with the server. */
3263 silc_server_remove_clients_by_server(server, user_data,
3266 /* Update our server cache to use the new backup router too. */
3267 silc_server_update_servers_by_server(server, user_data, backup_router);
3268 if (server->server_type == SILC_SERVER)
3269 silc_server_update_channels_by_server(server, user_data,
3272 /* Send notify about primary router going down to local operators */
3273 if (server->backup_router)
3274 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3275 SILC_NOTIFY_TYPE_NONE,
3276 ("%s switched to backup router %s "
3277 "(we are primary router now)",
3278 server->server_name, server->server_name));
3279 else if (server->router)
3280 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3281 SILC_NOTIFY_TYPE_NONE,
3282 ("%s switched to backup router %s",
3283 server->server_name,
3284 server->router->server_name));
3286 server->backup_noswitch = FALSE;
3288 /* Free the server entry */
3289 silc_server_backup_del(server, user_data);
3290 silc_server_backup_replaced_del(server, user_data);
3291 silc_idlist_del_data(user_data);
3292 if (!silc_idlist_del_server(server->local_list, user_data))
3293 silc_idlist_del_server(server->global_list, user_data);
3294 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3295 server->stat.my_servers--;
3297 server->stat.my_routers--;
3298 server->stat.routers--;
3300 server->stat.servers--;
3301 if (server->server_type == SILC_ROUTER)
3302 server->stat.cell_servers--;
3304 if (backup_router && backup_router != server->id_entry) {
3305 /* Announce all of our stuff that was created about 5 minutes ago.
3306 The backup router knows all the other stuff already. */
3307 if (server->server_type == SILC_ROUTER)
3308 silc_server_announce_servers(server, FALSE, time(0) - 300,
3309 backup_router->connection);
3311 /* Announce our clients and channels to the router */
3312 silc_server_announce_clients(server, time(0) - 300,
3313 backup_router->connection);
3314 silc_server_announce_channels(server, time(0) - 300,
3315 backup_router->connection);
3321 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3323 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3325 silc_idlist_del_data(user_data);
3326 silc_free(user_data);
3331 /* If any protocol is active cancel its execution */
3332 if (sock->protocol) {
3333 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3334 silc_protocol_cancel(sock->protocol, server->schedule);
3335 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3336 silc_protocol_execute_final(sock->protocol, server->schedule);
3337 sock->protocol = NULL;
3340 sock->user_data = NULL;
3343 /* Removes client from all channels it has joined. This is used when client
3344 connection is disconnected. If the client on a channel is last, the
3345 channel is removed as well. This sends the SIGNOFF notify types. */
3347 void silc_server_remove_from_channels(SilcServer server,
3348 SilcSocketConnection sock,
3349 SilcClientEntry client,
3351 const char *signoff_message,
3355 SilcChannelEntry channel;
3356 SilcChannelClientEntry chl;
3357 SilcHashTableList htl;
3358 SilcBuffer clidp = NULL;
3363 SILC_LOG_DEBUG(("Removing client from joined channels"));
3365 if (notify && !client->id)
3369 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3374 /* Remove the client from all channels. The client is removed from
3375 the channels' user list. */
3376 silc_hash_table_list(client->channels, &htl);
3377 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3378 channel = chl->channel;
3380 /* Remove channel if this is last client leaving the channel, unless
3381 the channel is permanent. */
3382 if (server->server_type != SILC_SERVER &&
3383 silc_hash_table_count(channel->user_list) < 2) {
3384 silc_server_channel_delete(server, channel);
3388 silc_hash_table_del(client->channels, channel);
3389 silc_hash_table_del(channel->user_list, client);
3390 channel->user_count--;
3392 /* If there is no global users on the channel anymore mark the channel
3393 as local channel. Do not check if the removed client is local client. */
3394 if (server->server_type == SILC_SERVER && channel->global_users &&
3395 chl->client->router && !silc_server_channel_has_global(channel))
3396 channel->global_users = FALSE;
3398 memset(chl, 'A', sizeof(*chl));
3401 /* Update statistics */
3402 if (SILC_IS_LOCAL(client))
3403 server->stat.my_chanclients--;
3404 if (server->server_type == SILC_ROUTER) {
3405 server->stat.cell_chanclients--;
3406 server->stat.chanclients--;
3409 /* If there is not at least one local user on the channel then we don't
3410 need the channel entry anymore, we can remove it safely, unless the
3411 channel is permanent channel */
3412 if (server->server_type == SILC_SERVER &&
3413 !silc_server_channel_has_local(channel)) {
3414 /* Notify about leaving client if this channel has global users. */
3415 if (notify && channel->global_users)
3416 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3417 SILC_NOTIFY_TYPE_SIGNOFF,
3418 signoff_message ? 2 : 1,
3419 clidp->data, clidp->len,
3420 signoff_message, signoff_message ?
3421 strlen(signoff_message) : 0);
3423 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3424 silc_server_channel_delete(server, channel);
3428 /* Send notify to channel about client leaving SILC and channel too */
3430 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3431 SILC_NOTIFY_TYPE_SIGNOFF,
3432 signoff_message ? 2 : 1,
3433 clidp->data, clidp->len,
3434 signoff_message, signoff_message ?
3435 strlen(signoff_message) : 0);
3437 if (killed && clidp) {
3438 /* Remove the client from channel's invite list */
3439 if (channel->invite_list &&
3440 silc_hash_table_count(channel->invite_list)) {
3442 SilcArgumentPayload iargs;
3443 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3445 iargs = silc_argument_payload_parse(ab->data, ab->len, 1);
3446 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3447 silc_buffer_free(ab);
3448 silc_argument_payload_free(iargs);
3452 /* Don't create keys if we are shutting down */
3453 if (server->server_shutdown)
3456 /* Re-generate channel key if needed */
3457 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3458 if (!silc_server_create_channel_key(server, channel, 0))
3461 /* Send the channel key to the channel. The key of course is not sent
3462 to the client who was removed from the channel. */
3463 silc_server_send_channel_key(server, client->connection, channel,
3464 server->server_type == SILC_ROUTER ?
3465 FALSE : !server->standalone);
3469 silc_hash_table_list_reset(&htl);
3471 silc_buffer_free(clidp);
3474 /* Removes client from one channel. This is used for example when client
3475 calls LEAVE command to remove itself from the channel. Returns TRUE
3476 if channel still exists and FALSE if the channel is removed when
3477 last client leaves the channel. If `notify' is FALSE notify messages
3480 bool silc_server_remove_from_one_channel(SilcServer server,
3481 SilcSocketConnection sock,
3482 SilcChannelEntry channel,
3483 SilcClientEntry client,
3486 SilcChannelClientEntry chl;
3489 SILC_LOG_DEBUG(("Removing %s from channel %s",
3490 silc_id_render(client->id, SILC_ID_CLIENT),
3491 channel->channel_name));
3493 /* Get the entry to the channel, if this client is not on the channel
3495 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3498 /* Remove channel if this is last client leaving the channel, unless
3499 the channel is permanent. */
3500 if (server->server_type != SILC_SERVER &&
3501 silc_hash_table_count(channel->user_list) < 2) {
3502 silc_server_channel_delete(server, channel);
3506 silc_hash_table_del(client->channels, channel);
3507 silc_hash_table_del(channel->user_list, client);
3508 channel->user_count--;
3510 /* If there is no global users on the channel anymore mark the channel
3511 as local channel. Do not check if the client is local client. */
3512 if (server->server_type == SILC_SERVER && channel->global_users &&
3513 chl->client->router && !silc_server_channel_has_global(channel))
3514 channel->global_users = FALSE;
3516 memset(chl, 'O', sizeof(*chl));
3519 /* Update statistics */
3520 if (SILC_IS_LOCAL(client))
3521 server->stat.my_chanclients--;
3522 if (server->server_type == SILC_ROUTER) {
3523 server->stat.cell_chanclients--;
3524 server->stat.chanclients--;
3527 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3531 /* If there is not at least one local user on the channel then we don't
3532 need the channel entry anymore, we can remove it safely, unless the
3533 channel is permanent channel */
3534 if (server->server_type == SILC_SERVER &&
3535 !silc_server_channel_has_local(channel)) {
3536 /* Notify about leaving client if this channel has global users. */
3537 if (notify && channel->global_users)
3538 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3539 SILC_NOTIFY_TYPE_LEAVE, 1,
3540 clidp->data, clidp->len);
3542 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3543 silc_server_channel_delete(server, channel);
3544 silc_buffer_free(clidp);
3548 /* Send notify to channel about client leaving the channel */
3550 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3551 SILC_NOTIFY_TYPE_LEAVE, 1,
3552 clidp->data, clidp->len);
3554 silc_buffer_free(clidp);
3558 /* Timeout callback. This is called if connection is idle or for some
3559 other reason is not responding within some period of time. This
3560 disconnects the remote end. */
3562 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3564 SilcServer server = (SilcServer)context;
3565 SilcSocketConnection sock = server->sockets[fd];
3566 SilcProtocolType protocol = 0;
3568 SILC_LOG_DEBUG(("Start"));
3573 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3574 sock->hostname, sock->ip));
3576 /* If we have protocol active we must assure that we call the protocol's
3577 final callback so that all the memory is freed. */
3578 if (sock->protocol) {
3579 protocol = sock->protocol->protocol->type;
3580 silc_protocol_cancel(sock->protocol, server->schedule);
3581 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3582 silc_protocol_execute_final(sock->protocol, server->schedule);
3583 sock->protocol = NULL;
3587 silc_server_disconnect_remote(server, sock,
3589 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3590 SILC_STATUS_ERR_AUTH_FAILED :
3591 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3592 "Connection timeout");
3594 if (sock->user_data)
3595 silc_server_free_sock_user_data(server, sock, NULL);
3598 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3599 function may be used only by router. In real SILC network all channels
3600 are created by routers thus this function is never used by normal
3603 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3604 SilcServerID *router_id,
3610 SilcChannelID *channel_id;
3611 SilcChannelEntry entry;
3615 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3618 cipher = SILC_DEFAULT_CIPHER;
3620 hmac = SILC_DEFAULT_HMAC;
3622 /* Allocate cipher */
3623 if (!silc_cipher_alloc(cipher, &key))
3627 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3628 silc_cipher_free(key);
3632 channel_name = strdup(channel_name);
3634 /* Create the channel ID */
3635 if (!silc_id_create_channel_id(server, router_id, server->rng,
3637 silc_free(channel_name);
3638 silc_cipher_free(key);
3639 silc_hmac_free(newhmac);
3643 /* Create the channel */
3644 entry = silc_idlist_add_channel(server->local_list, channel_name,
3645 SILC_CHANNEL_MODE_NONE, channel_id,
3646 NULL, key, newhmac, 0);
3648 silc_free(channel_name);
3649 silc_cipher_free(key);
3650 silc_hmac_free(newhmac);
3651 silc_free(channel_id);
3655 entry->cipher = strdup(cipher);
3656 entry->hmac_name = strdup(hmac);
3658 /* Now create the actual key material */
3659 if (!silc_server_create_channel_key(server, entry,
3660 silc_cipher_get_key_len(key) / 8)) {
3661 silc_idlist_del_channel(server->local_list, entry);
3665 /* Notify other routers about the new channel. We send the packet
3666 to our primary route. */
3668 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3669 channel_name, entry->id,
3670 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3673 /* Distribute to backup routers */
3674 if (broadcast && server->server_type == SILC_ROUTER) {
3677 SilcUInt32 name_len = strlen(channel_name);
3678 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3679 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3681 packet = silc_channel_payload_encode(channel_name, name_len,
3682 cid, channel_id_len, entry->mode);
3683 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3684 packet->data, packet->len, FALSE, TRUE);
3686 silc_buffer_free(packet);
3689 server->stat.my_channels++;
3690 if (server->server_type == SILC_ROUTER) {
3691 server->stat.channels++;
3692 server->stat.cell_channels++;
3693 entry->users_resolved = TRUE;
3699 /* Same as above but creates the channel with Channel ID `channel_id. */
3702 silc_server_create_new_channel_with_id(SilcServer server,
3706 SilcChannelID *channel_id,
3709 SilcChannelEntry entry;
3713 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3716 cipher = SILC_DEFAULT_CIPHER;
3718 hmac = SILC_DEFAULT_HMAC;
3720 /* Allocate cipher */
3721 if (!silc_cipher_alloc(cipher, &key))
3725 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3726 silc_cipher_free(key);
3730 channel_name = strdup(channel_name);
3732 /* Create the channel */
3733 entry = silc_idlist_add_channel(server->local_list, channel_name,
3734 SILC_CHANNEL_MODE_NONE, channel_id,
3735 NULL, key, newhmac, 0);
3737 silc_cipher_free(key);
3738 silc_hmac_free(newhmac);
3739 silc_free(channel_name);
3743 /* Now create the actual key material */
3744 if (!silc_server_create_channel_key(server, entry,
3745 silc_cipher_get_key_len(key) / 8)) {
3746 silc_idlist_del_channel(server->local_list, entry);
3750 /* Notify other routers about the new channel. We send the packet
3751 to our primary route. */
3753 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3754 channel_name, entry->id,
3755 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3758 /* Distribute to backup routers */
3759 if (broadcast && server->server_type == SILC_ROUTER) {
3762 SilcUInt32 name_len = strlen(channel_name);
3763 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3764 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3766 packet = silc_channel_payload_encode(channel_name, name_len,
3767 cid, channel_id_len, entry->mode);
3768 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3769 packet->data, packet->len, FALSE, TRUE);
3771 silc_buffer_free(packet);
3774 server->stat.my_channels++;
3775 if (server->server_type == SILC_ROUTER) {
3776 server->stat.channels++;
3777 server->stat.cell_channels++;
3778 entry->users_resolved = TRUE;
3784 /* Channel's key re-key timeout callback. */
3786 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3788 SilcServer server = app_context;
3789 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3793 /* Return now if we are shutting down */
3794 if (server->server_shutdown)
3797 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3800 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3803 /* Generates new channel key. This is used to create the initial channel key
3804 but also to re-generate new key for channel. If `key_len' is provided
3805 it is the bytes of the key length. */
3807 bool silc_server_create_channel_key(SilcServer server,
3808 SilcChannelEntry channel,
3812 unsigned char channel_key[32], hash[32];
3815 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3816 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3820 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3822 if (!channel->channel_key)
3823 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3824 channel->channel_key = NULL;
3830 else if (channel->key_len)
3831 len = channel->key_len / 8;
3833 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3835 /* Create channel key */
3836 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3839 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3841 /* Remove old key if exists */
3843 memset(channel->key, 0, channel->key_len / 8);
3844 silc_free(channel->key);
3848 channel->key_len = len * 8;
3849 channel->key = silc_memdup(channel_key, len);
3850 memset(channel_key, 0, sizeof(channel_key));
3852 /* Generate HMAC key from the channel key data and set it */
3854 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3855 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3856 silc_hmac_set_key(channel->hmac, hash,
3857 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3858 memset(hash, 0, sizeof(hash));
3860 if (server->server_type == SILC_ROUTER) {
3861 if (!channel->rekey)
3862 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3863 channel->rekey->channel = channel;
3864 channel->rekey->key_len = key_len;
3865 if (channel->rekey->task)
3866 silc_schedule_task_del(server->schedule, channel->rekey->task);
3868 channel->rekey->task =
3869 silc_schedule_task_add(server->schedule, 0,
3870 silc_server_channel_key_rekey,
3871 (void *)channel->rekey,
3872 server->config->channel_rekey_secs, 0,
3874 SILC_TASK_PRI_NORMAL);
3880 /* Saves the channel key found in the encoded `key_payload' buffer. This
3881 function is used when we receive Channel Key Payload and also when we're
3882 processing JOIN command reply. Returns entry to the channel. */
3884 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3885 SilcBuffer key_payload,
3886 SilcChannelEntry channel)
3888 SilcChannelKeyPayload payload = NULL;
3889 SilcChannelID *id = NULL;
3890 unsigned char *tmp, hash[32];
3894 /* Decode channel key payload */
3895 payload = silc_channel_key_payload_parse(key_payload->data,
3898 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3903 /* Get the channel entry */
3906 /* Get channel ID */
3907 tmp = silc_channel_key_get_id(payload, &tmp_len);
3908 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3914 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3916 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3918 if (server->server_type == SILC_ROUTER)
3919 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3920 silc_id_render(id, SILC_ID_CHANNEL)));
3926 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3928 tmp = silc_channel_key_get_key(payload, &tmp_len);
3934 cipher = silc_channel_key_get_cipher(payload, NULL);
3940 /* Remove old key if exists */
3942 memset(channel->key, 0, channel->key_len / 8);
3943 silc_free(channel->key);
3944 silc_cipher_free(channel->channel_key);
3947 /* Create new cipher */
3948 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3949 channel->channel_key = NULL;
3954 if (channel->cipher)
3955 silc_free(channel->cipher);
3956 channel->cipher = strdup(cipher);
3959 channel->key_len = tmp_len * 8;
3960 channel->key = silc_memdup(tmp, tmp_len);
3961 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3963 /* Generate HMAC key from the channel key data and set it */
3965 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3966 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3967 silc_hmac_set_key(channel->hmac, hash,
3968 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3970 memset(hash, 0, sizeof(hash));
3971 memset(tmp, 0, tmp_len);
3973 if (server->server_type == SILC_ROUTER) {
3974 if (!channel->rekey)
3975 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3976 channel->rekey->channel = channel;
3977 if (channel->rekey->task)
3978 silc_schedule_task_del(server->schedule, channel->rekey->task);
3980 channel->rekey->task =
3981 silc_schedule_task_add(server->schedule, 0,
3982 silc_server_channel_key_rekey,
3983 (void *)channel->rekey,
3984 server->config->channel_rekey_secs, 0,
3986 SILC_TASK_PRI_NORMAL);
3992 silc_channel_key_payload_free(payload);
3997 /* Heartbeat callback. This function is set as argument for the
3998 silc_socket_set_heartbeat function. The library will call this function
3999 at the set time interval. */
4001 void silc_server_perform_heartbeat(SilcSocketConnection sock,
4004 SilcServer server = hb_context;
4006 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
4007 sock->port, sock->ip));
4009 /* Send the heartbeat */
4010 silc_server_send_heartbeat(server, sock);
4013 /* Returns assembled of all servers in the given ID list. The packet's
4014 form is dictated by the New ID payload. */
4016 static void silc_server_announce_get_servers(SilcServer server,
4017 SilcServerEntry remote,
4019 SilcBuffer *servers,
4020 unsigned long creation_time)
4022 SilcIDCacheList list;
4023 SilcIDCacheEntry id_cache;
4024 SilcServerEntry entry;
4027 /* Go through all clients in the list */
4028 if (silc_idcache_get_all(id_list->servers, &list)) {
4029 if (silc_idcache_list_first(list, &id_cache)) {
4031 entry = (SilcServerEntry)id_cache->context;
4033 /* Do not announce the one we've sending our announcements and
4034 do not announce ourself. Also check the creation time if it's
4036 if ((entry == remote) || (entry == server->id_entry) ||
4037 (creation_time && entry->data.created < creation_time)) {
4038 if (!silc_idcache_list_next(list, &id_cache))
4043 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4045 *servers = silc_buffer_realloc(*servers,
4047 (*servers)->truelen + idp->len :
4049 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4050 silc_buffer_put(*servers, idp->data, idp->len);
4051 silc_buffer_pull(*servers, idp->len);
4052 silc_buffer_free(idp);
4054 if (!silc_idcache_list_next(list, &id_cache))
4059 silc_idcache_list_free(list);
4064 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4070 p = silc_notify_payload_encode(notify, argc, ap);
4076 /* This function is used by router to announce existing servers to our
4077 primary router when we've connected to it. If `creation_time' is non-zero
4078 then only the servers that has been created after the `creation_time'
4079 will be announced. */
4081 void silc_server_announce_servers(SilcServer server, bool global,
4082 unsigned long creation_time,
4083 SilcSocketConnection remote)
4085 SilcBuffer servers = NULL;
4087 SILC_LOG_DEBUG(("Announcing servers"));
4089 /* Get servers in local list */
4090 silc_server_announce_get_servers(server, remote->user_data,
4091 server->local_list, &servers,
4095 /* Get servers in global list */
4096 silc_server_announce_get_servers(server, remote->user_data,
4097 server->global_list, &servers,
4101 silc_buffer_push(servers, servers->data - servers->head);
4102 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4104 /* Send the packet */
4105 silc_server_packet_send(server, remote,
4106 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4107 servers->data, servers->len, TRUE);
4109 silc_buffer_free(servers);
4113 /* Returns assembled packet of all clients in the given ID list. The
4114 packet's form is dictated by the New ID Payload. */
4116 static void silc_server_announce_get_clients(SilcServer server,
4118 SilcBuffer *clients,
4120 unsigned long creation_time)
4122 SilcIDCacheList list;
4123 SilcIDCacheEntry id_cache;
4124 SilcClientEntry client;
4127 unsigned char mode[4];
4129 /* Go through all clients in the list */
4130 if (silc_idcache_get_all(id_list->clients, &list)) {
4131 if (silc_idcache_list_first(list, &id_cache)) {
4133 client = (SilcClientEntry)id_cache->context;
4135 if (creation_time && client->data.created < creation_time) {
4136 if (!silc_idcache_list_next(list, &id_cache))
4140 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4141 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4142 if (!silc_idcache_list_next(list, &id_cache))
4147 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4149 *clients = silc_buffer_realloc(*clients,
4151 (*clients)->truelen + idp->len :
4153 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4154 silc_buffer_put(*clients, idp->data, idp->len);
4155 silc_buffer_pull(*clients, idp->len);
4157 SILC_PUT32_MSB(client->mode, mode);
4159 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4160 2, idp->data, idp->len,
4162 *umodes = silc_buffer_realloc(*umodes,
4164 (*umodes)->truelen + tmp->len :
4166 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4167 silc_buffer_put(*umodes, tmp->data, tmp->len);
4168 silc_buffer_pull(*umodes, tmp->len);
4169 silc_buffer_free(tmp);
4171 silc_buffer_free(idp);
4173 if (!silc_idcache_list_next(list, &id_cache))
4178 silc_idcache_list_free(list);
4182 /* This function is used to announce our existing clients to our router
4183 when we've connected to it. If `creation_time' is non-zero then only
4184 the clients that has been created after the `creation_time' will be
4187 void silc_server_announce_clients(SilcServer server,
4188 unsigned long creation_time,
4189 SilcSocketConnection remote)
4191 SilcBuffer clients = NULL;
4192 SilcBuffer umodes = NULL;
4194 SILC_LOG_DEBUG(("Announcing clients"));
4196 /* Get clients in local list */
4197 silc_server_announce_get_clients(server, server->local_list,
4198 &clients, &umodes, creation_time);
4200 /* As router we announce our global list as well */
4201 if (server->server_type == SILC_ROUTER)
4202 silc_server_announce_get_clients(server, server->global_list,
4203 &clients, &umodes, creation_time);
4206 silc_buffer_push(clients, clients->data - clients->head);
4207 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4209 /* Send the packet */
4210 silc_server_packet_send(server, remote,
4211 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4212 clients->data, clients->len, TRUE);
4214 silc_buffer_free(clients);
4218 silc_buffer_push(umodes, umodes->data - umodes->head);
4219 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4221 /* Send the packet */
4222 silc_server_packet_send(server, remote,
4223 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4224 umodes->data, umodes->len, TRUE);
4226 silc_buffer_free(umodes);
4230 /* Returns channel's topic for announcing it */
4232 void silc_server_announce_get_channel_topic(SilcServer server,
4233 SilcChannelEntry channel,
4238 if (channel->topic) {
4239 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4240 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4241 chidp->data, chidp->len,
4243 strlen(channel->topic));
4244 silc_buffer_free(chidp);
4248 /* Returns assembled packets for channel users of the `channel'. */
4250 void silc_server_announce_get_channel_users(SilcServer server,
4251 SilcChannelEntry channel,
4252 SilcBuffer *channel_modes,
4253 SilcBuffer *channel_users,
4254 SilcBuffer *channel_users_modes)
4256 SilcChannelClientEntry chl;
4257 SilcHashTableList htl;
4258 SilcBuffer chidp, clidp, csidp;
4259 SilcBuffer tmp, fkey = NULL;
4261 unsigned char mode[4];
4264 SILC_LOG_DEBUG(("Start"));
4266 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4267 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4270 SILC_PUT32_MSB(channel->mode, mode);
4271 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4272 if (channel->founder_key)
4273 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4275 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4276 6, csidp->data, csidp->len,
4279 hmac, hmac ? strlen(hmac) : 0,
4280 channel->passphrase,
4281 channel->passphrase ?
4282 strlen(channel->passphrase) : 0,
4283 fkey ? fkey->data : NULL,
4284 fkey ? fkey->len : 0);
4287 silc_buffer_realloc(*channel_modes,
4289 (*channel_modes)->truelen + len : len));
4290 silc_buffer_pull_tail(*channel_modes,
4291 ((*channel_modes)->end -
4292 (*channel_modes)->data));
4293 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4294 silc_buffer_pull(*channel_modes, len);
4295 silc_buffer_free(tmp);
4296 silc_buffer_free(fkey);
4299 /* Now find all users on the channel */
4300 silc_hash_table_list(channel->user_list, &htl);
4301 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4302 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4305 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4306 clidp->data, clidp->len,
4307 chidp->data, chidp->len);
4310 silc_buffer_realloc(*channel_users,
4312 (*channel_users)->truelen + len : len));
4313 silc_buffer_pull_tail(*channel_users,
4314 ((*channel_users)->end -
4315 (*channel_users)->data));
4317 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4318 silc_buffer_pull(*channel_users, len);
4319 silc_buffer_free(tmp);
4321 /* CUMODE notify for mode change on the channel */
4322 SILC_PUT32_MSB(chl->mode, mode);
4323 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4324 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4325 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4326 4, csidp->data, csidp->len,
4328 clidp->data, clidp->len,
4329 fkey ? fkey->data : NULL,
4330 fkey ? fkey->len : 0);
4332 *channel_users_modes =
4333 silc_buffer_realloc(*channel_users_modes,
4334 (*channel_users_modes ?
4335 (*channel_users_modes)->truelen + len : len));
4336 silc_buffer_pull_tail(*channel_users_modes,
4337 ((*channel_users_modes)->end -
4338 (*channel_users_modes)->data));
4340 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4341 silc_buffer_pull(*channel_users_modes, len);
4342 silc_buffer_free(tmp);
4343 silc_buffer_free(fkey);
4345 silc_buffer_free(clidp);
4347 silc_hash_table_list_reset(&htl);
4348 silc_buffer_free(chidp);
4349 silc_buffer_free(csidp);
4352 /* Returns assembled packets for all channels and users on those channels
4353 from the given ID List. The packets are in the form dictated by the
4354 New Channel and New Channel User payloads. */
4356 void silc_server_announce_get_channels(SilcServer server,
4358 SilcBuffer *channels,
4359 SilcBuffer **channel_modes,
4360 SilcBuffer *channel_users,
4361 SilcBuffer **channel_users_modes,
4362 SilcUInt32 *channel_users_modes_c,
4363 SilcBuffer **channel_topics,
4364 SilcChannelID ***channel_ids,
4365 unsigned long creation_time)
4367 SilcIDCacheList list;
4368 SilcIDCacheEntry id_cache;
4369 SilcChannelEntry channel;
4372 SilcUInt16 name_len;
4374 int i = *channel_users_modes_c;
4377 SILC_LOG_DEBUG(("Start"));
4379 /* Go through all channels in the list */
4380 if (silc_idcache_get_all(id_list->channels, &list)) {
4381 if (silc_idcache_list_first(list, &id_cache)) {
4383 channel = (SilcChannelEntry)id_cache->context;
4385 if (creation_time && channel->created < creation_time)
4390 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4391 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4392 name_len = strlen(channel->channel_name);
4395 len = 4 + name_len + id_len + 4;
4397 silc_buffer_realloc(*channels,
4398 (*channels ? (*channels)->truelen +
4400 silc_buffer_pull_tail(*channels,
4401 ((*channels)->end - (*channels)->data));
4402 silc_buffer_format(*channels,
4403 SILC_STR_UI_SHORT(name_len),
4404 SILC_STR_UI_XNSTRING(channel->channel_name,
4406 SILC_STR_UI_SHORT(id_len),
4407 SILC_STR_UI_XNSTRING(cid, id_len),
4408 SILC_STR_UI_INT(channel->mode),
4410 silc_buffer_pull(*channels, len);
4413 if (creation_time && channel->updated < creation_time)
4419 /* Channel user modes */
4420 *channel_users_modes = silc_realloc(*channel_users_modes,
4421 sizeof(**channel_users_modes) *
4423 (*channel_users_modes)[i] = NULL;
4424 *channel_modes = silc_realloc(*channel_modes,
4425 sizeof(**channel_modes) * (i + 1));
4426 (*channel_modes)[i] = NULL;
4427 *channel_ids = silc_realloc(*channel_ids,
4428 sizeof(**channel_ids) * (i + 1));
4429 (*channel_ids)[i] = NULL;
4430 silc_server_announce_get_channel_users(server, channel,
4431 &(*channel_modes)[i],
4433 &(*channel_users_modes)[i]);
4434 (*channel_ids)[i] = channel->id;
4436 /* Channel's topic */
4437 *channel_topics = silc_realloc(*channel_topics,
4438 sizeof(**channel_topics) * (i + 1));
4439 (*channel_topics)[i] = NULL;
4440 silc_server_announce_get_channel_topic(server, channel,
4441 &(*channel_topics)[i]);
4442 (*channel_users_modes_c)++;
4449 if (!silc_idcache_list_next(list, &id_cache))
4454 silc_idcache_list_free(list);
4458 /* This function is used to announce our existing channels to our router
4459 when we've connected to it. This also announces the users on the
4460 channels to the router. If the `creation_time' is non-zero only the
4461 channels that was created after the `creation_time' are announced.
4462 Note that the channel users are still announced even if the `creation_time'
4465 void silc_server_announce_channels(SilcServer server,
4466 unsigned long creation_time,
4467 SilcSocketConnection remote)
4469 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4470 SilcBuffer *channel_users_modes = NULL;
4471 SilcBuffer *channel_topics = NULL;
4472 SilcUInt32 channel_users_modes_c = 0;
4473 SilcChannelID **channel_ids = NULL;
4475 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4477 /* Get channels and channel users in local list */
4478 silc_server_announce_get_channels(server, server->local_list,
4479 &channels, &channel_modes,
4481 &channel_users_modes,
4482 &channel_users_modes_c,
4484 &channel_ids, creation_time);
4486 /* Get channels and channel users in global list */
4487 if (server->server_type != SILC_SERVER)
4488 silc_server_announce_get_channels(server, server->global_list,
4489 &channels, &channel_modes,
4491 &channel_users_modes,
4492 &channel_users_modes_c,
4494 &channel_ids, creation_time);
4497 silc_buffer_push(channels, channels->data - channels->head);
4498 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4500 /* Send the packet */
4501 silc_server_packet_send(server, remote,
4502 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4503 channels->data, channels->len,
4506 silc_buffer_free(channels);
4509 if (channel_users) {
4510 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4511 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4512 channel_users->len);
4514 /* Send the packet */
4515 silc_server_packet_send(server, remote,
4516 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4517 channel_users->data, channel_users->len,
4520 silc_buffer_free(channel_users);
4523 if (channel_modes) {
4526 for (i = 0; i < channel_users_modes_c; i++) {
4527 if (!channel_modes[i])
4529 silc_buffer_push(channel_modes[i],
4530 channel_modes[i]->data -
4531 channel_modes[i]->head);
4532 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4533 channel_modes[i]->len);
4534 silc_server_packet_send_dest(server, remote,
4535 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4536 channel_ids[i], SILC_ID_CHANNEL,
4537 channel_modes[i]->data,
4538 channel_modes[i]->len,
4540 silc_buffer_free(channel_modes[i]);
4542 silc_free(channel_modes);
4545 if (channel_users_modes) {
4548 for (i = 0; i < channel_users_modes_c; i++) {
4549 if (!channel_users_modes[i])
4551 silc_buffer_push(channel_users_modes[i],
4552 channel_users_modes[i]->data -
4553 channel_users_modes[i]->head);
4554 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4555 channel_users_modes[i]->len);
4556 silc_server_packet_send_dest(server, remote,
4557 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4558 channel_ids[i], SILC_ID_CHANNEL,
4559 channel_users_modes[i]->data,
4560 channel_users_modes[i]->len,
4562 silc_buffer_free(channel_users_modes[i]);
4564 silc_free(channel_users_modes);
4567 if (channel_topics) {
4570 for (i = 0; i < channel_users_modes_c; i++) {
4571 if (!channel_topics[i])
4574 silc_buffer_push(channel_topics[i],
4575 channel_topics[i]->data -
4576 channel_topics[i]->head);
4577 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4578 channel_topics[i]->len);
4579 silc_server_packet_send_dest(server, remote,
4580 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4581 channel_ids[i], SILC_ID_CHANNEL,
4582 channel_topics[i]->data,
4583 channel_topics[i]->len,
4585 silc_buffer_free(channel_topics[i]);
4587 silc_free(channel_topics);
4590 silc_free(channel_ids);
4593 /* Failure timeout callback. If this is called then we will immediately
4594 process the received failure. We always process the failure with timeout
4595 since we do not want to blindly trust to received failure packets.
4596 This won't be called (the timeout is cancelled) if the failure was
4597 bogus (it is bogus if remote does not close the connection after sending
4600 SILC_TASK_CALLBACK(silc_server_failure_callback)
4602 SilcServer server = app_context;
4603 SilcServerFailureContext f = (SilcServerFailureContext)context;
4605 if (f->sock->protocol) {
4606 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4607 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4610 silc_socket_free(f->sock);
4614 /* Assembles user list and users mode list from the `channel'. */
4616 bool silc_server_get_users_on_channel(SilcServer server,
4617 SilcChannelEntry channel,
4618 SilcBuffer *user_list,
4619 SilcBuffer *mode_list,
4620 SilcUInt32 *user_count)
4622 SilcChannelClientEntry chl;
4623 SilcHashTableList htl;
4624 SilcBuffer client_id_list;
4625 SilcBuffer client_mode_list;
4627 SilcUInt32 list_count = 0, len = 0;
4629 if (!silc_hash_table_count(channel->user_list))
4632 silc_hash_table_list(channel->user_list, &htl);
4633 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4634 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4635 silc_hash_table_list_reset(&htl);
4637 client_id_list = silc_buffer_alloc(len);
4639 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4640 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4641 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4643 silc_hash_table_list(channel->user_list, &htl);
4644 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4646 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4647 silc_buffer_put(client_id_list, idp->data, idp->len);
4648 silc_buffer_pull(client_id_list, idp->len);
4649 silc_buffer_free(idp);
4651 /* Client's mode on channel */
4652 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4653 silc_buffer_pull(client_mode_list, 4);
4657 silc_hash_table_list_reset(&htl);
4658 silc_buffer_push(client_id_list,
4659 client_id_list->data - client_id_list->head);
4660 silc_buffer_push(client_mode_list,
4661 client_mode_list->data - client_mode_list->head);
4663 *user_list = client_id_list;
4664 *mode_list = client_mode_list;
4665 *user_count = list_count;
4669 /* Saves users and their modes to the `channel'. */
4671 void silc_server_save_users_on_channel(SilcServer server,
4672 SilcSocketConnection sock,
4673 SilcChannelEntry channel,
4674 SilcClientID *noadd,
4675 SilcBuffer user_list,
4676 SilcBuffer mode_list,
4677 SilcUInt32 user_count)
4682 SilcClientID *client_id;
4683 SilcClientEntry client;
4684 SilcIDCacheEntry cache;
4685 SilcChannelClientEntry chl;
4687 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4688 channel->channel_name));
4690 for (i = 0; i < user_count; i++) {
4692 SILC_GET16_MSB(idp_len, user_list->data + 2);
4694 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4695 silc_buffer_pull(user_list, idp_len);
4700 SILC_GET32_MSB(mode, mode_list->data);
4701 silc_buffer_pull(mode_list, 4);
4703 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4704 silc_free(client_id);
4710 /* Check if we have this client cached already. */
4711 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4712 server->server_type, &cache);
4714 client = silc_idlist_find_client_by_id(server->global_list,
4715 client_id, server->server_type,
4718 /* If router did not find such Client ID in its lists then this must
4719 be bogus client or some router in the net is buggy. */
4720 if (server->server_type != SILC_SERVER) {
4721 silc_free(client_id);
4725 /* We don't have that client anywhere, add it. The client is added
4726 to global list since server didn't have it in the lists so it must be
4728 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4729 silc_id_dup(client_id, SILC_ID_CLIENT),
4730 sock->user_data, NULL, 0);
4732 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4733 silc_free(client_id);
4737 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4742 silc_free(client_id);
4744 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4745 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4746 "%s", channel->channel_name));
4750 if (!silc_server_client_on_channel(client, channel, &chl)) {
4751 /* Client was not on the channel, add it. */
4752 chl = silc_calloc(1, sizeof(*chl));
4753 chl->client = client;
4755 chl->channel = channel;
4756 silc_hash_table_add(channel->user_list, chl->client, chl);
4757 silc_hash_table_add(client->channels, chl->channel, chl);
4758 channel->user_count++;
4766 /* Saves channels and channels user modes to the `client'. Removes
4767 the client from those channels that are not sent in the list but
4770 void silc_server_save_user_channels(SilcServer server,
4771 SilcSocketConnection sock,
4772 SilcClientEntry client,
4773 SilcBuffer channels,
4774 SilcBuffer channels_user_modes)
4777 SilcUInt32 *chumodes;
4778 SilcChannelPayload entry;
4779 SilcChannelEntry channel;
4780 SilcChannelID *channel_id;
4781 SilcChannelClientEntry chl;
4782 SilcHashTable ht = NULL;
4783 SilcHashTableList htl;
4787 if (!channels || !channels_user_modes ||
4788 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4791 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4792 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4794 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4795 NULL, NULL, NULL, TRUE);
4796 silc_dlist_start(ch);
4797 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4798 /* Check if we have this channel, and add it if we don't have it.
4799 Also add the client on the channel unless it is there already. */
4800 channel_id = silc_channel_get_id_parse(entry);
4801 channel = silc_idlist_find_channel_by_id(server->local_list,
4804 channel = silc_idlist_find_channel_by_id(server->global_list,
4807 if (server->server_type != SILC_SERVER) {
4808 silc_free(channel_id);
4813 /* We don't have that channel anywhere, add it. */
4814 name = silc_channel_get_name(entry, NULL);
4815 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4816 channel_id, server->router,
4819 silc_free(channel_id);
4826 channel->mode = silc_channel_get_mode(entry);
4828 /* Add the client on the channel */
4829 if (!silc_server_client_on_channel(client, channel, &chl)) {
4830 chl = silc_calloc(1, sizeof(*chl));
4831 chl->client = client;
4832 chl->mode = chumodes[i++];
4833 chl->channel = channel;
4834 silc_hash_table_add(channel->user_list, chl->client, chl);
4835 silc_hash_table_add(client->channels, chl->channel, chl);
4836 channel->user_count++;
4839 chl->mode = chumodes[i++];
4842 silc_hash_table_add(ht, channel, channel);
4843 silc_free(channel_id);
4845 silc_channel_payload_list_free(ch);
4846 silc_free(chumodes);
4850 /* Go through the list again and remove client from channels that
4851 are no part of the list. */
4853 silc_hash_table_list(client->channels, &htl);
4854 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4855 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4856 silc_hash_table_del(chl->channel->user_list, chl->client);
4857 silc_hash_table_del(chl->client->channels, chl->channel);
4861 silc_hash_table_list_reset(&htl);
4862 silc_hash_table_free(ht);
4864 silc_hash_table_list(client->channels, &htl);
4865 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4866 silc_hash_table_del(chl->channel->user_list, chl->client);
4867 silc_hash_table_del(chl->client->channels, chl->channel);
4870 silc_hash_table_list_reset(&htl);
4874 /* Lookups route to the client indicated by the `id_data'. The connection
4875 object and internal data object is returned. Returns NULL if route
4876 could not be found to the client. If the `client_id' is specified then
4877 it is used and the `id_data' is ignored. */
4879 SilcSocketConnection
4880 silc_server_get_client_route(SilcServer server,
4881 unsigned char *id_data,
4883 SilcClientID *client_id,
4884 SilcIDListData *idata,
4885 SilcClientEntry *client_entry)
4888 SilcClientEntry client;
4890 SILC_LOG_DEBUG(("Start"));
4893 *client_entry = NULL;
4895 /* Decode destination Client ID */
4897 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4899 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4903 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4906 /* If the destination belongs to our server we don't have to route
4907 the packet anywhere but to send it to the local destination. */
4908 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4912 /* If we are router and the client has router then the client is in
4913 our cell but not directly connected to us. */
4914 if (server->server_type == SILC_ROUTER && client->router) {
4915 /* We are of course in this case the client's router thus the route
4916 to the client is the server who owns the client. So, we will send
4917 the packet to that server. */
4919 *idata = (SilcIDListData)client->router;
4920 return client->router->connection;
4923 /* Seems that client really is directly connected to us */
4925 *idata = (SilcIDListData)client;
4927 *client_entry = client;
4928 return client->connection;
4931 /* Destination belongs to someone not in this server. If we are normal
4932 server our action is to send the packet to our router. */
4933 if (server->server_type != SILC_ROUTER && !server->standalone) {
4936 *idata = (SilcIDListData)server->router;
4937 return SILC_PRIMARY_ROUTE(server);
4940 /* We are router and we will perform route lookup for the destination
4941 and send the packet to fastest route. */
4942 if (server->server_type == SILC_ROUTER && !server->standalone) {
4943 /* Check first that the ID is valid */
4944 client = silc_idlist_find_client_by_id(server->global_list, id,
4947 SilcSocketConnection dst_sock;
4949 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4953 *idata = (SilcIDListData)dst_sock->user_data;
4962 /* Encodes and returns channel list of channels the `client' has joined.
4963 Secret channels are not put to the list. */
4965 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4966 SilcClientEntry client,
4969 SilcBuffer *user_mode_list)
4971 SilcBuffer buffer = NULL;
4972 SilcChannelEntry channel;
4973 SilcChannelClientEntry chl;
4974 SilcHashTableList htl;
4977 SilcUInt16 name_len;
4981 *user_mode_list = NULL;
4983 silc_hash_table_list(client->channels, &htl);
4984 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4985 channel = chl->channel;
4987 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4989 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4992 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4993 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4994 name_len = strlen(channel->channel_name);
4996 len = 4 + name_len + id_len + 4;
4997 buffer = silc_buffer_realloc(buffer,
4998 (buffer ? buffer->truelen + len : len));
4999 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5000 silc_buffer_format(buffer,
5001 SILC_STR_UI_SHORT(name_len),
5002 SILC_STR_UI_XNSTRING(channel->channel_name,
5004 SILC_STR_UI_SHORT(id_len),
5005 SILC_STR_UI_XNSTRING(cid, id_len),
5006 SILC_STR_UI_INT(chl->channel->mode),
5008 silc_buffer_pull(buffer, len);
5011 if (user_mode_list) {
5012 *user_mode_list = silc_buffer_realloc(*user_mode_list,
5014 (*user_mode_list)->truelen + 4 :
5016 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5017 (*user_mode_list)->data));
5018 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5019 silc_buffer_pull(*user_mode_list, 4);
5022 silc_hash_table_list_reset(&htl);
5025 silc_buffer_push(buffer, buffer->data - buffer->head);
5026 if (user_mode_list && *user_mode_list)
5027 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5028 (*user_mode_list)->head));
5033 /* A timeout callback for the re-key. We will be the initiator of the
5036 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5038 SilcServer server = app_context;
5039 SilcSocketConnection sock = (SilcSocketConnection)context;
5040 SilcIDListData idata = (SilcIDListData)sock->user_data;
5041 SilcProtocol protocol;
5042 SilcServerRekeyInternalContext *proto_ctx;
5044 /* Allocate internal protocol context. This is sent as context
5046 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5047 proto_ctx->server = (void *)server;
5048 proto_ctx->sock = sock;
5049 proto_ctx->responder = FALSE;
5050 proto_ctx->pfs = idata->rekey->pfs;
5052 /* Perform rekey protocol. Will call the final callback after the
5053 protocol is over. */
5054 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5055 &protocol, proto_ctx, silc_server_rekey_final);
5056 sock->protocol = protocol;
5058 /* Run the protocol */
5059 silc_protocol_execute(protocol, server->schedule, 0, 0);
5061 SILC_LOG_DEBUG(("Rekey protocol completed"));
5063 /* Re-register re-key timeout */
5064 silc_schedule_task_add(server->schedule, sock->sock,
5065 silc_server_rekey_callback,
5066 context, idata->rekey->timeout, 0,
5067 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5070 /* The final callback for the REKEY protocol. This will actually take the
5071 new key material into use. */
5073 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5075 SilcProtocol protocol = (SilcProtocol)context;
5076 SilcServerRekeyInternalContext *ctx =
5077 (SilcServerRekeyInternalContext *)protocol->context;
5078 SilcServer server = (SilcServer)ctx->server;
5079 SilcSocketConnection sock = ctx->sock;
5081 SILC_LOG_DEBUG(("Start"));
5083 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5084 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5085 /* Error occured during protocol */
5086 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5087 silc_protocol_cancel(protocol, server->schedule);
5088 silc_protocol_free(protocol);
5089 sock->protocol = NULL;
5091 silc_packet_context_free(ctx->packet);
5093 silc_ske_free(ctx->ske);
5098 /* Purge the outgoing data queue to assure that all rekey packets really
5099 go to the network before we quit the protocol. */
5100 silc_server_packet_queue_purge(server, sock);
5103 silc_protocol_free(protocol);
5104 sock->protocol = NULL;
5106 silc_packet_context_free(ctx->packet);
5108 silc_ske_free(ctx->ske);
5112 /* Task callback used to retrieve network statistical information from
5113 router server once in a while. */
5115 SILC_TASK_CALLBACK(silc_server_get_stats)
5117 SilcServer server = (SilcServer)context;
5118 SilcBuffer idp, packet;
5120 SILC_LOG_DEBUG(("Retrieving stats from router"));
5122 if (!server->standalone) {
5123 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5124 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5125 ++server->cmd_ident, 1,
5126 1, idp->data, idp->len);
5127 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5128 SILC_PACKET_COMMAND, 0, packet->data,
5129 packet->len, FALSE);
5130 silc_buffer_free(packet);
5131 silc_buffer_free(idp);
5134 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5135 server, 120, 0, SILC_TASK_TIMEOUT,