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_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_close_connection_final);
41 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
42 SILC_TASK_CALLBACK(silc_server_timeout_remote);
43 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
44 SILC_TASK_CALLBACK(silc_server_get_stats);
46 /* Allocates a new SILC server object. This has to be done before the server
47 can be used. After allocation one must call silc_server_init to initialize
48 the server. The new allocated server object is returned to the new_server
51 int silc_server_alloc(SilcServer *new_server)
55 SILC_LOG_DEBUG(("Allocating new server object"));
57 server = silc_calloc(1, sizeof(*server));
58 server->server_type = SILC_SERVER;
59 server->standalone = TRUE;
60 server->local_list = silc_calloc(1, sizeof(*server->local_list));
61 server->global_list = silc_calloc(1, sizeof(*server->global_list));
62 server->pending_commands = silc_dlist_init();
64 server->sim = silc_dlist_init();
72 /* Free's the SILC server object. This is called at the very end before
75 void silc_server_free(SilcServer server)
78 SilcIDCacheEntry cache;
86 silc_dlist_start(server->sim);
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_server_backup_free(server);
97 silc_server_config_unref(&server->config_ref);
99 silc_rng_free(server->rng);
101 silc_pkcs_free(server->pkcs);
102 if (server->public_key)
103 silc_pkcs_public_key_free(server->public_key);
104 if (server->private_key)
105 silc_pkcs_private_key_free(server->private_key);
106 if (server->pending_commands)
107 silc_dlist_uninit(server->pending_commands);
108 if (server->id_entry)
109 silc_idlist_del_server(server->local_list, server->id_entry);
111 /* Delete all channels */
113 if (silc_idcache_get_all(server->local_list->channels, &list) &&
114 silc_idcache_list_first(list, &cache)) {
115 silc_idlist_del_channel(server->local_list, cache->context);
116 while (silc_idcache_list_next(list, &cache))
117 silc_idlist_del_channel(server->local_list, cache->context);
120 silc_idcache_list_free(list);
122 if (silc_idcache_get_all(server->global_list->channels, &list) &&
123 silc_idcache_list_first(list, &cache)) {
124 silc_idlist_del_channel(server->global_list, cache->context);
125 while (silc_idcache_list_next(list, &cache))
126 silc_idlist_del_channel(server->global_list, cache->context);
129 silc_idcache_list_free(list);
131 /* Delete all clients */
133 if (silc_idcache_get_all(server->local_list->clients, &list) &&
134 silc_idcache_list_first(list, &cache)) {
135 silc_idlist_del_client(server->local_list, cache->context);
136 while (silc_idcache_list_next(list, &cache))
137 silc_idlist_del_client(server->local_list, cache->context);
140 silc_idcache_list_free(list);
142 if (silc_idcache_get_all(server->global_list->clients, &list) &&
143 silc_idcache_list_first(list, &cache)) {
144 silc_idlist_del_client(server->global_list, cache->context);
145 while (silc_idcache_list_next(list, &cache))
146 silc_idlist_del_client(server->global_list, cache->context);
149 silc_idcache_list_free(list);
151 /* Delete all servers */
153 if (silc_idcache_get_all(server->local_list->servers, &list) &&
154 silc_idcache_list_first(list, &cache)) {
155 silc_idlist_del_server(server->local_list, cache->context);
156 while (silc_idcache_list_next(list, &cache))
157 silc_idlist_del_server(server->local_list, cache->context);
160 silc_idcache_list_free(list);
162 if (silc_idcache_get_all(server->global_list->servers, &list) &&
163 silc_idcache_list_first(list, &cache)) {
164 silc_idlist_del_server(server->global_list, cache->context);
165 while (silc_idcache_list_next(list, &cache))
166 silc_idlist_del_server(server->global_list, cache->context);
169 silc_idcache_list_free(list);
171 silc_idcache_free(server->local_list->clients);
172 silc_idcache_free(server->local_list->servers);
173 silc_idcache_free(server->local_list->channels);
174 silc_idcache_free(server->global_list->clients);
175 silc_idcache_free(server->global_list->servers);
176 silc_idcache_free(server->global_list->channels);
177 silc_hash_table_free(server->watcher_list);
179 silc_hash_free(server->md5hash);
180 silc_hash_free(server->sha1hash);
181 silc_hmac_unregister_all();
182 silc_hash_unregister_all();
183 silc_cipher_unregister_all();
184 silc_pkcs_unregister_all();
186 silc_free(server->local_list);
187 silc_free(server->global_list);
188 silc_free(server->server_name);
189 silc_free(server->id_string);
190 silc_free(server->purge_i);
191 silc_free(server->purge_g);
195 /* Creates a new server listener. */
197 static bool silc_server_listen(SilcServer server, const char *server_ip,
198 SilcUInt16 port, int *sock)
200 *sock = silc_net_create_server(port, server_ip);
202 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
209 /* Adds a secondary listener. */
211 bool silc_server_init_secondary(SilcServer server)
213 int sock = 0, sock_list[server->config->param.connections_max];
214 SilcSocketConnection newsocket = NULL;
215 SilcServerConfigServerInfoInterface *interface;
217 for (interface = server->config->server_info->secondary; interface;
218 interface = interface->next, sock++) {
220 if (!silc_server_listen(server,
221 interface->server_ip, interface->port, &sock_list[sock]))
224 /* Set socket to non-blocking mode */
225 silc_net_set_socket_nonblock(sock_list[sock]);
227 /* Add ourselves also to the socket table. The entry allocated above
228 is sent as argument for fast referencing in the future. */
229 silc_socket_alloc(sock_list[sock],
230 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
231 server->sockets[sock_list[sock]] = newsocket;
232 SILC_SET_LISTENER(newsocket);
234 /* Perform name and address lookups to resolve the listenning address
236 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
238 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
240 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
241 newsocket->hostname ? newsocket->hostname :
242 newsocket->ip ? newsocket->ip : ""));
243 server->stat.conn_failures++;
246 if (!newsocket->hostname)
247 newsocket->hostname = strdup(newsocket->ip);
249 newsocket->port = silc_net_get_local_port(sock);
251 newsocket->user_data = (void *)server->id_entry;
252 silc_schedule_task_add(server->schedule, sock_list[sock],
253 silc_server_accept_new_connection,
254 (void *)server, 0, 0,
256 SILC_TASK_PRI_NORMAL);
262 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
266 /* Initializes the entire SILC server. This is called always before running
267 the server. This is called only once at the initialization of the program.
268 This binds the server to its listenning port. After this function returns
269 one should call silc_server_run to start the server. This returns TRUE
270 when everything is ok to run the server. Configuration file must be
271 read and parsed before calling this. */
273 bool silc_server_init(SilcServer server)
277 SilcServerEntry id_entry;
278 SilcIDListPurge purge;
279 SilcSocketConnection newsocket = NULL;
281 SILC_LOG_DEBUG(("Initializing server"));
283 server->starttime = time(NULL);
285 /* Take config object for us */
286 silc_server_config_ref(&server->config_ref, server->config,
289 /* Steal public and private key from the config object */
290 server->public_key = server->config->server_info->public_key;
291 server->private_key = server->config->server_info->private_key;
292 server->config->server_info->public_key = NULL;
293 server->config->server_info->private_key = NULL;
295 /* Register all configured ciphers, PKCS and hash functions. */
296 if (!silc_server_config_register_ciphers(server))
297 silc_cipher_register_default();
298 if (!silc_server_config_register_pkcs(server))
299 silc_pkcs_register_default();
300 if (!silc_server_config_register_hashfuncs(server))
301 silc_hash_register_default();
302 if (!silc_server_config_register_hmacs(server))
303 silc_hmac_register_default();
305 /* Initialize random number generator for the server. */
306 server->rng = silc_rng_alloc();
307 silc_rng_init(server->rng);
308 silc_rng_global_init(server->rng);
310 /* Initialize hash functions for server to use */
311 silc_hash_alloc("md5", &server->md5hash);
312 silc_hash_alloc("sha1", &server->sha1hash);
314 /* Allocate PKCS context for local public and private keys */
315 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
317 silc_pkcs_public_key_set(server->pkcs, server->public_key);
318 silc_pkcs_private_key_set(server->pkcs, server->private_key);
320 /* Initialize the scheduler */
321 server->schedule = silc_schedule_init(server->config->param.connections_max,
323 if (!server->schedule)
326 /* First, register log files configuration for error output */
327 silc_server_config_setlogfiles(server);
329 /* Initialize ID caches */
330 server->local_list->clients =
331 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
332 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
333 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
335 /* These are allocated for normal server as well as these hold some
336 global information that the server has fetched from its router. For
337 router these are used as they are supposed to be used on router. */
338 server->global_list->clients =
339 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
340 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
341 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
343 /* Init watcher list */
344 server->watcher_list =
345 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
346 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
348 if (!server->watcher_list)
351 /* Create a listening server */
352 if (!silc_server_listen(server,
353 server->config->server_info->primary == NULL ? NULL :
354 server->config->server_info->primary->server_ip,
355 server->config->server_info->primary == NULL ? 0 :
356 server->config->server_info->primary->port,
360 /* Set socket to non-blocking mode */
361 silc_net_set_socket_nonblock(sock);
364 /* Allocate the entire socket list that is used in server. Eventually
365 all connections will have entry in this table (it is a table of
366 pointers to the actual object that is allocated individually
368 server->sockets = silc_calloc(server->config->param.connections_max,
369 sizeof(*server->sockets));
370 if (!server->sockets)
373 /* Add ourselves also to the socket table. The entry allocated above
374 is sent as argument for fast referencing in the future. */
375 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
376 server->sockets[sock] = newsocket;
377 SILC_SET_LISTENER(newsocket);
379 /* Perform name and address lookups to resolve the listenning address
381 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
383 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
385 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
386 newsocket->hostname ? newsocket->hostname :
387 newsocket->ip ? newsocket->ip : ""));
388 server->stat.conn_failures++;
391 if (!newsocket->hostname)
392 newsocket->hostname = strdup(newsocket->ip);
394 newsocket->port = silc_net_get_local_port(sock);
396 /* Create a Server ID for the server. */
397 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
402 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
403 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
404 server->server_name = server->config->server_info->server_name;
405 server->config->server_info->server_name = NULL;
407 /* Add ourselves to the server list. We don't have a router yet
408 beacuse we haven't established a route yet. It will be done later.
409 For now, NULL is sent as router. This allocates new entry to
412 silc_idlist_add_server(server->local_list, strdup(server->server_name),
413 server->server_type, server->id, NULL, NULL);
415 SILC_LOG_ERROR(("Could not add ourselves to cache"));
418 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
420 /* Put the allocated socket pointer also to the entry allocated above
421 for fast back-referencing to the socket list. */
422 newsocket->user_data = (void *)id_entry;
423 id_entry->connection = (void *)newsocket;
424 server->id_entry = id_entry;
426 /* Register protocols */
427 silc_server_protocols_register();
429 /* Add the first task to the scheduler. This is task that is executed by
430 timeout. It expires as soon as the caller calls silc_server_run. This
431 task performs authentication protocol and key exchange with our
433 silc_schedule_task_add(server->schedule, 0,
434 silc_server_connect_to_router,
435 (void *)server, 0, 1,
437 SILC_TASK_PRI_NORMAL);
439 /* Add listener task to the scheduler. This task receives new connections
440 to the server. This task remains on the queue until the end of the
442 silc_schedule_task_add(server->schedule, sock,
443 silc_server_accept_new_connection,
444 (void *)server, 0, 0,
446 SILC_TASK_PRI_NORMAL);
448 if (silc_server_init_secondary(server) == FALSE)
451 server->listenning = TRUE;
453 /* If server connections has been configured then we must be router as
454 normal server cannot have server connections, only router connections. */
455 if (server->config->servers) {
456 SilcServerConfigServer *ptr = server->config->servers;
458 server->server_type = SILC_ROUTER;
460 if (ptr->backup_router) {
461 server->server_type = SILC_BACKUP_ROUTER;
462 server->backup_router = TRUE;
463 server->id_entry->server_type = SILC_BACKUP_ROUTER;
470 /* Register the ID Cache purge task. This periodically purges the ID cache
471 and removes the expired cache entries. */
473 /* Clients local list */
474 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
475 purge->cache = server->local_list->clients;
476 purge->timeout = 600;
477 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
478 (void *)purge, purge->timeout, 0,
479 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
481 /* Clients global list */
482 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
483 purge->cache = server->global_list->clients;
484 purge->timeout = 300;
485 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
486 (void *)purge, purge->timeout, 0,
487 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
489 /* If we are normal server we'll retrieve network statisticial information
490 once in a while from the router. */
491 if (server->server_type != SILC_ROUTER)
492 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
493 server, 10, 0, SILC_TASK_TIMEOUT,
496 if (server->server_type == SILC_ROUTER)
497 server->stat.routers++;
499 SILC_LOG_DEBUG(("Server initialized"));
501 /* We are done here, return succesfully */
505 silc_server_config_unref(&server->config_ref);
506 silc_net_close_server(sock);
510 /* Task callback to close a socket connection after rehash */
512 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
514 SilcServer server = context;
515 SilcSocketConnection sock = server->sockets[fd];
520 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
521 sock->hostname, sock->port,
522 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
523 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
524 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
526 silc_schedule_task_del_by_context(server->schedule, sock);
527 silc_server_disconnect_remote(server, sock,
528 SILC_STATUS_ERR_BANNED_FROM_SERVER,
529 "This connection is removed from "
532 silc_server_free_sock_user_data(server, sock, NULL);
535 /* This function basically reads the config file again and switches the config
536 object pointed by the server object. After that, we have to fix various
537 things such as the server_name and the listening ports.
538 Keep in mind that we no longer have the root privileges at this point. */
540 bool silc_server_rehash(SilcServer server)
542 SilcServerConfig newconfig;
544 SILC_LOG_INFO(("Rehashing server"));
546 /* Reset the logging system */
547 silc_log_quick = TRUE;
548 silc_log_flush_all();
550 /* Start the main rehash phase (read again the config file) */
551 newconfig = silc_server_config_alloc(server->config_file);
553 SILC_LOG_ERROR(("Rehash FAILED."));
557 /* Reinit scheduler if necessary */
558 if (newconfig->param.connections_max > server->config->param.connections_max)
559 if (!silc_schedule_reinit(server->schedule,
560 newconfig->param.connections_max))
563 /* Fix the server_name field */
564 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
565 silc_free(server->server_name);
566 server->server_name = newconfig->server_info->server_name;
567 newconfig->server_info->server_name = NULL;
569 /* Update the idcache list with a fresh pointer */
570 silc_free(server->id_entry->server_name);
571 server->id_entry->server_name = strdup(server->server_name);
572 if (!silc_idcache_del_by_context(server->local_list->servers,
575 if (!silc_idcache_add(server->local_list->servers,
576 server->id_entry->server_name,
577 server->id_entry->id, server->id_entry, 0, NULL))
582 silc_server_config_setlogfiles(server);
584 /* Change new key pair if necessary */
585 if (newconfig->server_info->public_key &&
586 !silc_pkcs_public_key_compare(server->public_key,
587 newconfig->server_info->public_key)) {
588 silc_pkcs_public_key_free(server->public_key);
589 silc_pkcs_private_key_free(server->private_key);
590 server->public_key = newconfig->server_info->public_key;
591 server->private_key = newconfig->server_info->private_key;
592 newconfig->server_info->public_key = NULL;
593 newconfig->server_info->private_key = NULL;
595 /* Allocate PKCS context for local public and private keys */
596 silc_pkcs_free(server->pkcs);
597 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
599 silc_pkcs_public_key_set(server->pkcs, server->public_key);
600 silc_pkcs_private_key_set(server->pkcs, server->private_key);
603 /* Check for unconfigured server and router connections and close
604 connections that were unconfigured. */
606 if (server->config->routers) {
607 SilcServerConfigRouter *ptr;
608 SilcServerConfigRouter *newptr;
611 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
614 /* Check whether new config has this one too */
615 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
616 if (silc_string_compare(newptr->host, ptr->host) &&
617 newptr->port == ptr->port &&
618 newptr->initiator == ptr->initiator) {
624 if (!found && ptr->host) {
625 /* Remove this connection */
626 SilcSocketConnection sock;
627 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
628 ptr->host, ptr->port);
629 if (sock && !SILC_IS_LISTENER(sock))
630 silc_schedule_task_add(server->schedule, sock->sock,
631 silc_server_rehash_close_connection,
632 server, 0, 1, SILC_TASK_TIMEOUT,
633 SILC_TASK_PRI_NORMAL);
638 if (server->config->servers) {
639 SilcServerConfigServer *ptr;
640 SilcServerConfigServer *newptr;
643 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
646 /* Check whether new config has this one too */
647 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
648 if (silc_string_compare(newptr->host, ptr->host)) {
654 if (!found && ptr->host) {
655 /* Remove this connection */
656 SilcSocketConnection sock;
657 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
659 if (sock && !SILC_IS_LISTENER(sock))
660 silc_schedule_task_add(server->schedule, sock->sock,
661 silc_server_rehash_close_connection,
662 server, 0, 1, SILC_TASK_TIMEOUT,
663 SILC_TASK_PRI_NORMAL);
668 if (server->config->clients) {
669 SilcServerConfigClient *ptr;
670 SilcServerConfigClient *newptr;
673 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
676 /* Check whether new config has this one too */
677 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
678 if (silc_string_compare(newptr->host, ptr->host)) {
684 if (!found && ptr->host) {
685 /* Remove this connection */
686 SilcSocketConnection sock;
687 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
690 silc_schedule_task_add(server->schedule, sock->sock,
691 silc_server_rehash_close_connection,
692 server, 0, 1, SILC_TASK_TIMEOUT,
693 SILC_TASK_PRI_NORMAL);
698 /* Go through all configured routers after rehash */
699 silc_schedule_task_add(server->schedule, 0,
700 silc_server_connect_to_router,
701 (void *)server, 0, 1,
703 SILC_TASK_PRI_NORMAL);
705 /* Check whether our router status has changed */
706 if (newconfig->servers) {
707 SilcServerConfigServer *ptr = newconfig->servers;
709 server->server_type = SILC_ROUTER;
711 if (ptr->backup_router) {
712 server->server_type = SILC_BACKUP_ROUTER;
713 server->backup_router = TRUE;
714 server->id_entry->server_type = SILC_BACKUP_ROUTER;
721 /* Our old config is gone now. We'll unreference our reference made in
722 silc_server_init and then destroy it since we are destroying it
723 underneath the application (layer which called silc_server_init). */
724 silc_server_config_unref(&server->config_ref);
725 silc_server_config_destroy(server->config);
727 /* Take new config context */
728 server->config = newconfig;
729 silc_server_config_ref(&server->config_ref, server->config, server->config);
731 SILC_LOG_DEBUG(("Server rehashed"));
736 /* The heart of the server. This runs the scheduler thus runs the server.
737 When this returns the server has been stopped and the program will
740 void silc_server_run(SilcServer server)
742 SILC_LOG_INFO(("SILC Server started"));
744 /* Start the scheduler, the heart of the SILC server. When this returns
745 the program will be terminated. */
746 silc_schedule(server->schedule);
749 /* Stops the SILC server. This function is used to shutdown the server.
750 This is usually called after the scheduler has returned. After stopping
751 the server one should call silc_server_free. */
753 void silc_server_stop(SilcServer server)
755 SILC_LOG_INFO(("SILC Server shutting down"));
757 if (server->schedule) {
760 server->server_shutdown = TRUE;
762 /* Close all connections */
763 for (i = 0; i < server->config->param.connections_max; i++) {
764 if (!server->sockets[i])
766 if (!SILC_IS_LISTENER(server->sockets[i])) {
767 SilcSocketConnection sock = server->sockets[i];
768 SilcIDListData idata = sock->user_data;
771 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
773 silc_schedule_task_del_by_context(server->schedule,
775 silc_server_disconnect_remote(server, server->sockets[i],
777 "Server is shutting down");
779 silc_server_free_sock_user_data(server, sock,
780 "Server is shutting down");
781 silc_socket_free(sock);
783 silc_socket_free(server->sockets[i]);
784 server->sockets[i] = NULL;
788 /* We are not connected to network anymore */
789 server->standalone = TRUE;
791 silc_schedule_stop(server->schedule);
792 silc_schedule_uninit(server->schedule);
793 server->schedule = NULL;
795 silc_free(server->sockets);
796 server->sockets = NULL;
799 silc_server_protocols_unregister();
801 SILC_LOG_DEBUG(("Server stopped"));
804 /* Function that is called when the network connection to a router has
805 been established. This will continue with the key exchange protocol
806 with the remote router. */
808 void silc_server_start_key_exchange(SilcServer server,
809 SilcServerConnection sconn,
812 SilcSocketConnection newsocket;
813 SilcProtocol protocol;
814 SilcServerKEInternalContext *proto_ctx;
815 SilcServerConfigRouter *conn =
816 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
819 /* Cancel any possible retry timeouts */
820 silc_schedule_task_del_by_callback(server->schedule,
821 silc_server_connect_to_router_retry);
823 /* Set socket options */
824 silc_net_set_socket_nonblock(sock);
825 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
827 /* Create socket connection for the connection. Even though we
828 know that we are connecting to a router we will mark the socket
829 to be unknown connection until we have executed authentication
831 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
832 server->sockets[sock] = newsocket;
833 newsocket->hostname = strdup(sconn->remote_host);
834 newsocket->ip = strdup(sconn->remote_host);
835 newsocket->port = sconn->remote_port;
836 sconn->sock = newsocket;
838 /* Allocate internal protocol context. This is sent as context
840 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
841 proto_ctx->server = (void *)server;
842 proto_ctx->context = (void *)sconn;
843 proto_ctx->sock = newsocket;
844 proto_ctx->rng = server->rng;
845 proto_ctx->responder = FALSE;
847 /* Set Key Exchange flags from configuration, but fall back to global
849 SILC_GET_SKE_FLAGS(conn, proto_ctx);
850 if (server->config->param.key_exchange_pfs)
851 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
853 /* Perform key exchange protocol. silc_server_connect_to_router_second
854 will be called after the protocol is finished. */
855 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
856 &protocol, proto_ctx,
857 silc_server_connect_to_router_second);
858 newsocket->protocol = protocol;
860 /* Register a timeout task that will be executed if the protocol
861 is not executed within set limit. */
862 proto_ctx->timeout_task =
863 silc_schedule_task_add(server->schedule, sock,
864 silc_server_timeout_remote,
865 server, server->config->key_exchange_timeout, 0,
869 /* Register the connection for network input and output. This sets
870 that scheduler will listen for incoming packets for this connection
871 and sets that outgoing packets may be sent to this connection as
872 well. However, this doesn't set the scheduler for outgoing traffic,
873 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
874 later when outgoing data is available. */
875 context = (void *)server;
876 SILC_REGISTER_CONNECTION_FOR_IO(sock);
878 /* Run the protocol */
879 silc_protocol_execute(protocol, server->schedule, 0, 0);
882 /* Timeout callback that will be called to retry connecting to remote
883 router. This is used by both normal and router server. This will wait
884 before retrying the connecting. The timeout is generated by exponential
885 backoff algorithm. */
887 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
889 SilcServer server = app_context;
890 SilcServerConnection sconn = (SilcServerConnection)context;
891 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
892 SilcServerConfigConnParams *param =
893 (conn->param ? conn->param : &server->config->param);
895 /* Don't retry if we are shutting down. */
896 if (server->server_shutdown) {
897 silc_server_config_unref(&sconn->conn);
898 silc_free(sconn->remote_host);
899 silc_free(sconn->backup_replace_ip);
904 SILC_LOG_INFO(("Retrying connecting to a router"));
906 /* Calculate next timeout */
907 if (sconn->retry_count >= 1) {
908 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
909 if (sconn->retry_timeout > param->reconnect_interval_max)
910 sconn->retry_timeout = param->reconnect_interval_max;
912 sconn->retry_timeout = param->reconnect_interval;
914 sconn->retry_count++;
915 sconn->retry_timeout = sconn->retry_timeout +
916 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
918 /* If we've reached max retry count, give up. */
919 if ((sconn->retry_count > param->reconnect_count) &&
920 !param->reconnect_keep_trying) {
921 SILC_LOG_ERROR(("Could not connect to router, giving up"));
922 silc_server_config_unref(&sconn->conn);
923 silc_free(sconn->remote_host);
924 silc_free(sconn->backup_replace_ip);
929 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
930 sconn->retry_timeout));
932 /* We will lookup a fresh pointer later */
933 silc_server_config_unref(&sconn->conn);
935 /* Wait one before retrying */
936 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
937 context, sconn->retry_timeout, 0,
938 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
941 /* Generic routine to use connect to a router. */
943 SILC_TASK_CALLBACK(silc_server_connect_router)
945 SilcServer server = app_context;
946 SilcServerConnection sconn = (SilcServerConnection)context;
947 SilcServerConfigRouter *rconn;
950 /* Don't connect if we are shutting down. */
951 if (server->server_shutdown) {
952 silc_free(sconn->remote_host);
953 silc_free(sconn->backup_replace_ip);
958 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
959 (sconn->backup ? "backup router" : "router"),
960 sconn->remote_host, sconn->remote_port));
962 server->router_connect = time(NULL);
963 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
966 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
967 (sconn->backup ? "backup router" : "router"),
968 sconn->remote_host, sconn->remote_port));
969 silc_free(sconn->remote_host);
970 silc_free(sconn->backup_replace_ip);
974 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
976 /* Connect to remote host */
977 sock = silc_net_create_connection(
978 (!server->config->server_info->primary ? NULL :
979 server->config->server_info->primary->server_ip),
980 sconn->remote_port, sconn->remote_host);
982 SILC_LOG_ERROR(("Could not connect to router %s:%d",
983 sconn->remote_host, sconn->remote_port));
984 if (!sconn->no_reconnect)
985 silc_schedule_task_add(server->schedule, 0,
986 silc_server_connect_to_router_retry,
987 context, 0, 1, SILC_TASK_TIMEOUT,
988 SILC_TASK_PRI_NORMAL);
990 silc_server_config_unref(&sconn->conn);
991 silc_free(sconn->remote_host);
992 silc_free(sconn->backup_replace_ip);
998 /* Continue with key exchange protocol */
999 silc_server_start_key_exchange(server, sconn, sock);
1002 /* This function connects to our primary router or if we are a router this
1003 establishes all our primary routes. This is called at the start of the
1004 server to do authentication and key exchange with our router - called
1007 SILC_TASK_CALLBACK_GLOBAL(silc_server_connect_to_router)
1009 SilcServer server = (SilcServer)context;
1010 SilcServerConnection sconn;
1011 SilcServerConfigRouter *ptr;
1013 /* Don't connect if we are shutting down. */
1014 if (server->server_shutdown)
1017 SILC_LOG_DEBUG(("We are %s",
1018 (server->server_type == SILC_SERVER ?
1019 "normal server" : server->server_type == SILC_ROUTER ?
1020 "router" : "backup router/normal server")));
1022 if (!server->config->routers) {
1023 /* There wasn't a configured router, we will continue but we don't
1024 have a connection to outside world. We will be standalone server. */
1025 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1026 server->standalone = TRUE;
1030 /* Cancel any possible retry timeouts */
1031 silc_schedule_task_del_by_callback(server->schedule,
1032 silc_server_connect_router);
1033 silc_schedule_task_del_by_callback(server->schedule,
1034 silc_server_connect_to_router_retry);
1036 /* Create the connections to all our routes */
1037 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1039 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1040 ptr->backup_router ? "Backup router" : "Router",
1041 ptr->initiator ? "Initiator" : "Responder",
1042 ptr->host, ptr->port));
1044 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1045 ptr->initiator == FALSE && !server->backup_router &&
1046 !silc_server_config_get_backup_router(server))
1047 server->wait_backup = TRUE;
1049 if (ptr->initiator) {
1050 /* Check whether we are connected to this host already */
1051 if (silc_server_num_sockets_by_remote(server,
1052 silc_net_is_ip(ptr->host) ?
1054 silc_net_is_ip(ptr->host) ?
1055 NULL : ptr->host, ptr->port,
1056 SILC_SOCKET_TYPE_ROUTER)) {
1057 SILC_LOG_DEBUG(("We are already connected to this router"));
1061 /* Allocate connection object for hold connection specific stuff. */
1062 sconn = silc_calloc(1, sizeof(*sconn));
1063 sconn->remote_host = strdup(ptr->host);
1064 sconn->remote_port = ptr->port;
1065 sconn->backup = ptr->backup_router;
1066 if (sconn->backup) {
1067 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1068 sconn->backup_replace_port = ptr->backup_replace_port;
1071 if (!server->router_conn && !sconn->backup)
1072 server->router_conn = sconn;
1074 silc_schedule_task_add(server->schedule, 0,
1075 silc_server_connect_router,
1076 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1077 SILC_TASK_PRI_NORMAL);
1082 /* Second part of connecting to router(s). Key exchange protocol has been
1083 executed and now we will execute authentication protocol. */
1085 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1087 SilcProtocol protocol = (SilcProtocol)context;
1088 SilcServerKEInternalContext *ctx =
1089 (SilcServerKEInternalContext *)protocol->context;
1090 SilcServer server = (SilcServer)ctx->server;
1091 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1092 SilcSocketConnection sock = ctx->sock;
1093 SilcServerConnAuthInternalContext *proto_ctx;
1094 SilcServerConfigRouter *conn = NULL;
1096 SILC_LOG_DEBUG(("Start"));
1098 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1099 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1100 /* Error occured during protocol */
1101 silc_protocol_free(protocol);
1102 sock->protocol = NULL;
1103 silc_ske_free_key_material(ctx->keymat);
1105 silc_packet_context_free(ctx->packet);
1107 silc_ske_free(ctx->ske);
1108 silc_free(ctx->dest_id);
1110 silc_server_disconnect_remote(server, sock,
1111 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1113 /* Try reconnecting if configuration wants it */
1114 if (!sconn->no_reconnect) {
1115 silc_schedule_task_add(server->schedule, 0,
1116 silc_server_connect_to_router_retry,
1117 sconn, 0, 1, SILC_TASK_TIMEOUT,
1118 SILC_TASK_PRI_NORMAL);
1122 /* Call completion to indicate error */
1123 if (sconn->callback)
1124 (*sconn->callback)(server, NULL, sconn->callback_context);
1126 silc_server_config_unref(&sconn->conn);
1127 silc_free(sconn->remote_host);
1128 silc_free(sconn->backup_replace_ip);
1133 /* We now have the key material as the result of the key exchange
1134 protocol. Take the key material into use. Free the raw key material
1135 as soon as we've set them into use. */
1136 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1137 ctx->sock, ctx->keymat,
1138 ctx->ske->prop->cipher,
1139 ctx->ske->prop->pkcs,
1140 ctx->ske->prop->hash,
1141 ctx->ske->prop->hmac,
1142 ctx->ske->prop->group,
1144 silc_protocol_free(protocol);
1145 sock->protocol = NULL;
1146 silc_ske_free_key_material(ctx->keymat);
1148 silc_packet_context_free(ctx->packet);
1150 silc_ske_free(ctx->ske);
1151 silc_free(ctx->dest_id);
1153 silc_server_disconnect_remote(server, sock,
1154 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1156 /* Try reconnecting if configuration wants it */
1157 if (!sconn->no_reconnect) {
1158 silc_schedule_task_add(server->schedule, 0,
1159 silc_server_connect_to_router_retry,
1160 sconn, 0, 1, SILC_TASK_TIMEOUT,
1161 SILC_TASK_PRI_NORMAL);
1165 /* Call completion to indicate error */
1166 if (sconn->callback)
1167 (*sconn->callback)(server, NULL, sconn->callback_context);
1169 silc_server_config_unref(&sconn->conn);
1170 silc_free(sconn->remote_host);
1171 silc_free(sconn->backup_replace_ip);
1175 silc_ske_free_key_material(ctx->keymat);
1177 /* Allocate internal context for the authentication protocol. This
1178 is sent as context for the protocol. */
1179 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1180 proto_ctx->server = (void *)server;
1181 proto_ctx->context = (void *)sconn;
1182 proto_ctx->sock = sock;
1183 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1184 proto_ctx->dest_id_type = ctx->dest_id_type;
1185 proto_ctx->dest_id = ctx->dest_id;
1187 /* Resolve the authentication method used in this connection. Check if
1188 we find a match from user configured connections */
1189 if (!sconn->conn.ref_ptr)
1190 conn = silc_server_config_find_router_conn(server, sock->hostname,
1193 conn = sconn->conn.ref_ptr;
1196 /* Match found. Use the configured authentication method. Take only
1197 the passphrase, since for public key auth we automatically use
1198 our local key pair. */
1199 if (conn->passphrase) {
1200 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1201 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1203 proto_ctx->auth_data = strdup(conn->passphrase);
1204 proto_ctx->auth_data_len = strlen(conn->passphrase);
1205 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1207 } else if (conn->publickeys) {
1208 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1210 proto_ctx->auth_meth = SILC_AUTH_NONE;
1213 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1214 sock->hostname, sock->ip, sock->port));
1215 silc_protocol_free(protocol);
1216 sock->protocol = NULL;
1218 silc_packet_context_free(ctx->packet);
1220 silc_ske_free(ctx->ske);
1221 silc_free(ctx->dest_id);
1223 silc_server_config_unref(&sconn->conn);
1224 silc_free(sconn->remote_host);
1225 silc_free(sconn->backup_replace_ip);
1227 silc_server_disconnect_remote(server, sock,
1228 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1232 /* Free old protocol as it is finished now */
1233 silc_protocol_free(protocol);
1235 silc_packet_context_free(ctx->packet);
1237 sock->protocol = NULL;
1239 /* Allocate the authentication protocol. This is allocated here
1240 but we won't start it yet. We will be receiving party of this
1241 protocol thus we will wait that connecting party will make
1242 their first move. */
1243 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1244 &sock->protocol, proto_ctx,
1245 silc_server_connect_to_router_final);
1247 /* Register timeout task. If the protocol is not executed inside
1248 this timelimit the connection will be terminated. */
1249 proto_ctx->timeout_task =
1250 silc_schedule_task_add(server->schedule, sock->sock,
1251 silc_server_timeout_remote,
1253 server->config->conn_auth_timeout, 0,
1257 /* Run the protocol */
1258 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1261 /* Finalizes the connection to router. Registers a server task to the
1262 queue so that we can accept new connections. */
1264 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1266 SilcProtocol protocol = (SilcProtocol)context;
1267 SilcServerConnAuthInternalContext *ctx =
1268 (SilcServerConnAuthInternalContext *)protocol->context;
1269 SilcServer server = (SilcServer)ctx->server;
1270 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1271 SilcSocketConnection sock = ctx->sock;
1272 SilcServerEntry id_entry = NULL;
1274 unsigned char *id_string;
1276 SilcIDListData idata;
1277 SilcServerConfigRouter *conn = NULL;
1278 SilcServerConfigConnParams *param = NULL;
1280 SILC_LOG_DEBUG(("Start"));
1282 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1283 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1284 /* Error occured during protocol */
1285 silc_free(ctx->dest_id);
1286 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1289 /* Try reconnecting if configuration wants it */
1290 if (!sconn->no_reconnect) {
1291 silc_schedule_task_add(server->schedule, 0,
1292 silc_server_connect_to_router_retry,
1293 sconn, 0, 1, SILC_TASK_TIMEOUT,
1294 SILC_TASK_PRI_NORMAL);
1301 /* Add a task to the queue. This task receives new connections to the
1302 server. This task remains on the queue until the end of the program. */
1303 if (!server->listenning && !sconn->backup) {
1304 silc_schedule_task_add(server->schedule, server->sock,
1305 silc_server_accept_new_connection,
1306 (void *)server, 0, 0,
1308 SILC_TASK_PRI_NORMAL);
1309 server->listenning = TRUE;
1312 /* Send NEW_SERVER packet to the router. We will become registered
1313 to the SILC network after sending this packet. */
1314 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1315 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1316 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1317 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1318 silc_buffer_format(packet,
1319 SILC_STR_UI_SHORT(id_len),
1320 SILC_STR_UI_XNSTRING(id_string, id_len),
1321 SILC_STR_UI_SHORT(strlen(server->server_name)),
1322 SILC_STR_UI_XNSTRING(server->server_name,
1323 strlen(server->server_name)),
1326 /* Send the packet */
1327 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1328 packet->data, packet->len, TRUE);
1329 silc_buffer_free(packet);
1330 silc_free(id_string);
1332 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1334 /* Check that we do not have this ID already */
1335 id_entry = silc_idlist_find_server_by_id(server->local_list,
1336 ctx->dest_id, TRUE, NULL);
1338 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1340 id_entry = silc_idlist_find_server_by_id(server->global_list,
1341 ctx->dest_id, TRUE, NULL);
1343 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1346 SILC_LOG_DEBUG(("New server id(%s)",
1347 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1349 /* Add the connected router to global server list. Router is sent
1350 as NULL since it's local to us. */
1351 id_entry = silc_idlist_add_server(server->global_list,
1352 strdup(sock->hostname),
1353 SILC_ROUTER, ctx->dest_id, NULL, sock);
1355 silc_free(ctx->dest_id);
1356 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1357 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1362 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1363 silc_free(sock->user_data);
1364 sock->user_data = (void *)id_entry;
1365 sock->type = SILC_SOCKET_TYPE_ROUTER;
1366 idata = (SilcIDListData)sock->user_data;
1367 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1368 SILC_IDLIST_STATUS_LOCAL);
1370 conn = sconn->conn.ref_ptr;
1371 param = &server->config->param;
1372 if (conn && conn->param)
1373 param = conn->param;
1375 /* Perform keepalive. */
1376 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1377 silc_server_perform_heartbeat,
1380 /* Register re-key timeout */
1381 idata->rekey->timeout = param->key_exchange_rekey;
1382 silc_schedule_task_add(server->schedule, sock->sock,
1383 silc_server_rekey_callback,
1384 (void *)sock, idata->rekey->timeout, 0,
1385 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1387 if (!sconn->backup) {
1388 /* Mark this router our primary router if we're still standalone */
1389 if (server->standalone) {
1390 SILC_LOG_DEBUG(("This connection is our primary router"));
1391 server->id_entry->router = id_entry;
1392 server->router = id_entry;
1393 server->standalone = FALSE;
1395 /* If we are router then announce our possible servers. Backup
1396 router announces also global servers. */
1397 if (server->server_type == SILC_ROUTER)
1398 silc_server_announce_servers(server,
1399 server->backup_router ? TRUE : FALSE,
1400 0, SILC_PRIMARY_ROUTE(server));
1402 /* Announce our clients and channels to the router */
1403 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1404 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1406 /* If we are backup router then this primary router is whom we are
1408 if (server->server_type == SILC_BACKUP_ROUTER)
1409 silc_server_backup_add(server, server->id_entry, sock->ip,
1410 sconn->remote_port, TRUE);
1413 /* Add this server to be our backup router */
1414 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1415 sconn->backup_replace_port, FALSE);
1418 sock->protocol = NULL;
1421 /* Call the completion callback to indicate that we've connected to
1423 if (sconn && sconn->callback)
1424 (*sconn->callback)(server, id_entry, sconn->callback_context);
1426 /* Free the temporary connection data context */
1428 silc_server_config_unref(&sconn->conn);
1429 silc_free(sconn->remote_host);
1430 silc_free(sconn->backup_replace_ip);
1433 if (sconn == server->router_conn)
1434 server->router_conn = NULL;
1437 /* Free the protocol object */
1438 if (sock->protocol == protocol)
1439 sock->protocol = NULL;
1440 silc_protocol_free(protocol);
1442 silc_packet_context_free(ctx->packet);
1444 silc_ske_free(ctx->ske);
1445 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1446 silc_free(ctx->auth_data);
1450 /* Host lookup callback that is called after the incoming connection's
1451 IP and FQDN lookup is performed. This will actually check the acceptance
1452 of the incoming connection and will register the key exchange protocol
1453 for this connection. */
1456 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1459 SilcServerKEInternalContext *proto_ctx =
1460 (SilcServerKEInternalContext *)context;
1461 SilcServer server = (SilcServer)proto_ctx->server;
1462 SilcServerConfigClient *cconfig = NULL;
1463 SilcServerConfigServer *sconfig = NULL;
1464 SilcServerConfigRouter *rconfig = NULL;
1465 SilcServerConfigDeny *deny;
1468 /* Check whether we could resolve both IP and FQDN. */
1469 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1470 server->config->require_reverse_lookup)) {
1471 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1472 sock->hostname ? sock->hostname :
1473 sock->ip ? sock->ip : ""));
1474 server->stat.conn_failures++;
1475 silc_server_disconnect_remote(server, sock,
1476 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1477 "Unknown host or IP");
1478 silc_free(proto_ctx);
1482 /* Register the connection for network input and output. This sets
1483 that scheduler will listen for incoming packets for this connection
1484 and sets that outgoing packets may be sent to this connection as well.
1485 However, this doesn't set the scheduler for outgoing traffic, it
1486 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1487 later when outgoing data is available. */
1488 context = (void *)server;
1489 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1491 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1494 /* Listenning port */
1495 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1496 silc_server_disconnect_remote(server, sock,
1497 SILC_STATUS_ERR_RESOURCE_LIMIT,
1498 "Connection refused");
1499 server->stat.conn_failures++;
1500 silc_free(proto_ctx);
1503 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1505 /* Check whether this connection is denied to connect to us. */
1506 deny = silc_server_config_find_denied(server, sock->ip);
1508 deny = silc_server_config_find_denied(server, sock->hostname);
1510 /* The connection is denied */
1511 SILC_LOG_INFO(("Connection %s (%s) is denied",
1512 sock->hostname, sock->ip));
1513 silc_server_disconnect_remote(server, sock,
1514 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1516 server->stat.conn_failures++;
1517 silc_free(proto_ctx);
1521 /* Check whether we have configured this sort of connection at all. We
1522 have to check all configurations since we don't know what type of
1523 connection this is. */
1524 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1525 cconfig = silc_server_config_find_client(server, sock->hostname);
1526 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1527 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1528 if (server->server_type == SILC_ROUTER) {
1529 if (!(rconfig = silc_server_config_find_router_conn(server,
1530 sock->ip, sock->port)))
1531 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1534 if (!cconfig && !sconfig && !rconfig) {
1535 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1537 silc_server_disconnect_remote(server, sock,
1538 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1539 server->stat.conn_failures++;
1540 silc_free(proto_ctx);
1544 /* The connection is allowed */
1546 /* Set internal context for key exchange protocol. This is
1547 sent as context for the protocol. */
1548 proto_ctx->sock = sock;
1549 proto_ctx->rng = server->rng;
1550 proto_ctx->responder = TRUE;
1551 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1552 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1553 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1555 /* Take flags for key exchange. Since we do not know what type of connection
1556 this is, we go through all found configurations and use the global ones
1557 as well. This will result always into strictest key exchange flags. */
1558 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1559 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1560 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1561 if (server->config->param.key_exchange_pfs)
1562 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1564 /* Prepare the connection for key exchange protocol. We allocate the
1565 protocol but will not start it yet. The connector will be the
1566 initiator of the protocol thus we will wait for initiation from
1567 there before we start the protocol. */
1568 server->stat.auth_attempts++;
1569 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1570 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1571 &sock->protocol, proto_ctx,
1572 silc_server_accept_new_connection_second);
1574 /* Register a timeout task that will be executed if the connector
1575 will not start the key exchange protocol within specified timeout
1576 and the connection will be closed. */
1577 proto_ctx->timeout_task =
1578 silc_schedule_task_add(server->schedule, sock->sock,
1579 silc_server_timeout_remote,
1581 server->config->key_exchange_timeout, 0,
1586 /* Accepts new connections to the server. Accepting new connections are
1587 done in three parts to make it async. */
1589 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1591 SilcServer server = (SilcServer)context;
1592 SilcSocketConnection newsocket;
1593 SilcServerKEInternalContext *proto_ctx;
1596 SILC_LOG_DEBUG(("Accepting new connection"));
1598 server->stat.conn_attempts++;
1600 sock = silc_net_accept_connection(fd);
1602 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1603 server->stat.conn_failures++;
1607 /* Check for maximum allowed connections */
1608 if (sock > server->config->param.connections_max) {
1609 SILC_LOG_ERROR(("Refusing connection, server is full"));
1610 server->stat.conn_failures++;
1611 silc_net_close_connection(sock);
1615 /* Set socket options */
1616 silc_net_set_socket_nonblock(sock);
1617 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1619 /* We don't create a ID yet, since we don't know what type of connection
1620 this is yet. But, we do add the connection to the socket table. */
1621 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1622 server->sockets[sock] = newsocket;
1624 /* Perform asynchronous host lookup. This will lookup the IP and the
1625 FQDN of the remote connection. After the lookup is done the connection
1626 is accepted further. */
1627 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1628 proto_ctx->server = server;
1629 proto_ctx->context = (void *)fd;
1630 silc_socket_host_lookup(newsocket, TRUE,
1631 silc_server_accept_new_connection_lookup,
1632 (void *)proto_ctx, server->schedule);
1635 /* Second part of accepting new connection. Key exchange protocol has been
1636 performed and now it is time to do little connection authentication
1637 protocol to figure out whether this connection is client or server
1638 and whether it has right to access this server (especially server
1639 connections needs to be authenticated). */
1641 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1643 SilcProtocol protocol = (SilcProtocol)context;
1644 SilcServerKEInternalContext *ctx =
1645 (SilcServerKEInternalContext *)protocol->context;
1646 SilcServer server = (SilcServer)ctx->server;
1647 SilcSocketConnection sock = ctx->sock;
1648 SilcServerConnAuthInternalContext *proto_ctx;
1650 SILC_LOG_DEBUG(("Start"));
1652 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1653 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1654 /* Error occured during protocol */
1655 SILC_LOG_DEBUG(("Error key exchange protocol"));
1656 silc_protocol_free(protocol);
1657 sock->protocol = NULL;
1658 silc_ske_free_key_material(ctx->keymat);
1660 silc_packet_context_free(ctx->packet);
1662 silc_ske_free(ctx->ske);
1663 silc_free(ctx->dest_id);
1664 silc_server_config_unref(&ctx->cconfig);
1665 silc_server_config_unref(&ctx->sconfig);
1666 silc_server_config_unref(&ctx->rconfig);
1668 silc_server_disconnect_remote(server, sock,
1669 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1671 server->stat.auth_failures++;
1675 /* We now have the key material as the result of the key exchange
1676 protocol. Take the key material into use. Free the raw key material
1677 as soon as we've set them into use. */
1678 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1679 ctx->sock, ctx->keymat,
1680 ctx->ske->prop->cipher,
1681 ctx->ske->prop->pkcs,
1682 ctx->ske->prop->hash,
1683 ctx->ske->prop->hmac,
1684 ctx->ske->prop->group,
1686 SILC_LOG_ERROR(("Error setting key material in use"));
1687 silc_protocol_free(protocol);
1688 sock->protocol = NULL;
1689 silc_ske_free_key_material(ctx->keymat);
1691 silc_packet_context_free(ctx->packet);
1693 silc_ske_free(ctx->ske);
1694 silc_free(ctx->dest_id);
1695 silc_server_config_unref(&ctx->cconfig);
1696 silc_server_config_unref(&ctx->sconfig);
1697 silc_server_config_unref(&ctx->rconfig);
1699 silc_server_disconnect_remote(server, sock,
1700 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1701 server->stat.auth_failures++;
1704 silc_ske_free_key_material(ctx->keymat);
1706 /* Allocate internal context for the authentication protocol. This
1707 is sent as context for the protocol. */
1708 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1709 proto_ctx->server = (void *)server;
1710 proto_ctx->sock = sock;
1711 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1712 proto_ctx->responder = TRUE;
1713 proto_ctx->dest_id_type = ctx->dest_id_type;
1714 proto_ctx->dest_id = ctx->dest_id;
1715 proto_ctx->cconfig = ctx->cconfig;
1716 proto_ctx->sconfig = ctx->sconfig;
1717 proto_ctx->rconfig = ctx->rconfig;
1719 /* Free old protocol as it is finished now */
1720 silc_protocol_free(protocol);
1722 silc_packet_context_free(ctx->packet);
1724 sock->protocol = NULL;
1726 /* Allocate the authentication protocol. This is allocated here
1727 but we won't start it yet. We will be receiving party of this
1728 protocol thus we will wait that connecting party will make
1729 their first move. */
1730 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1731 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1732 &sock->protocol, proto_ctx,
1733 silc_server_accept_new_connection_final);
1735 /* Register timeout task. If the protocol is not executed inside
1736 this timelimit the connection will be terminated. */
1737 proto_ctx->timeout_task =
1738 silc_schedule_task_add(server->schedule, sock->sock,
1739 silc_server_timeout_remote,
1741 server->config->conn_auth_timeout, 0,
1746 /* After this is called, server don't wait for backup router anymore.
1747 This gets called automatically even after we have backup router
1748 connection established. */
1750 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1752 SilcServer server = context;
1753 server->wait_backup = FALSE;
1756 /* Final part of accepting new connection. The connection has now
1757 been authenticated and keys has been exchanged. We also know whether
1758 this is client or server connection. */
1760 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1762 SilcProtocol protocol = (SilcProtocol)context;
1763 SilcServerConnAuthInternalContext *ctx =
1764 (SilcServerConnAuthInternalContext *)protocol->context;
1765 SilcServer server = (SilcServer)ctx->server;
1766 SilcSocketConnection sock = ctx->sock;
1767 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1769 SilcServerConfigConnParams *param = &server->config->param;
1771 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1772 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1773 /* Error occured during protocol */
1774 SILC_LOG_DEBUG(("Error during authentication protocol"));
1775 silc_protocol_free(protocol);
1776 sock->protocol = NULL;
1778 silc_packet_context_free(ctx->packet);
1780 silc_ske_free(ctx->ske);
1781 silc_free(ctx->dest_id);
1782 silc_server_config_unref(&ctx->cconfig);
1783 silc_server_config_unref(&ctx->sconfig);
1784 silc_server_config_unref(&ctx->rconfig);
1786 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1788 server->stat.auth_failures++;
1792 entry->data.last_receive = time(NULL);
1794 switch (ctx->conn_type) {
1795 case SILC_SOCKET_TYPE_CLIENT:
1797 SilcClientEntry client;
1798 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1800 /* Verify whether this connection is after all allowed to connect */
1801 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1802 &server->config->param,
1803 conn->param, ctx->ske)) {
1804 server->stat.auth_failures++;
1808 /* If we are primary router and we have backup router configured
1809 but it has not connected to use yet, do not accept any other
1811 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1812 !server->backup_router) {
1813 SilcServerConfigRouter *router;
1814 router = silc_server_config_get_backup_router(server);
1815 if (router && strcmp(server->config->server_info->primary->server_ip,
1817 silc_server_find_socket_by_host(server,
1818 SILC_SOCKET_TYPE_SERVER,
1819 router->backup_replace_ip, 0)) {
1820 SILC_LOG_INFO(("Will not accept connections because we do "
1821 "not have backup router connection established"));
1822 silc_server_disconnect_remote(server, sock,
1823 SILC_STATUS_ERR_PERM_DENIED,
1824 "We do not have connection to backup "
1825 "router established, try later");
1826 silc_free(sock->user_data);
1827 server->stat.auth_failures++;
1829 /* From here on, wait 10 seconds for the backup router to appear. */
1830 silc_schedule_task_add(server->schedule, 0,
1831 silc_server_backup_router_wait,
1832 (void *)server, 10, 0,
1833 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1838 SILC_LOG_DEBUG(("Remote host is client"));
1839 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1842 /* Add the client to the client ID cache. The nickname and Client ID
1843 and other information is created after we have received NEW_CLIENT
1844 packet from client. */
1845 client = silc_idlist_add_client(server->local_list,
1846 NULL, NULL, NULL, NULL, NULL, sock, 0);
1848 SILC_LOG_ERROR(("Could not add new client to cache"));
1849 silc_free(sock->user_data);
1850 silc_server_disconnect_remote(server, sock,
1851 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1852 server->stat.auth_failures++;
1855 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1858 server->stat.my_clients++;
1859 server->stat.clients++;
1860 server->stat.cell_clients++;
1862 /* Get connection parameters */
1864 param = conn->param;
1866 if (!param->keepalive_secs)
1867 param->keepalive_secs = server->config->param.keepalive_secs;
1869 if (!param->qos && server->config->param.qos) {
1870 param->qos = server->config->param.qos;
1871 param->qos_rate_limit = server->config->param.qos_rate_limit;
1872 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1873 param->qos_limit_sec = server->config->param.qos_limit_sec;
1874 param->qos_limit_usec = server->config->param.qos_limit_usec;
1877 /* Check if to be anonymous connection */
1878 if (param->anonymous)
1879 client->mode |= SILC_UMODE_ANONYMOUS;
1882 id_entry = (void *)client;
1885 case SILC_SOCKET_TYPE_SERVER:
1886 case SILC_SOCKET_TYPE_ROUTER:
1888 SilcServerEntry new_server;
1889 bool initiator = FALSE;
1890 bool backup_local = FALSE;
1891 bool backup_router = FALSE;
1892 char *backup_replace_ip = NULL;
1893 SilcUInt16 backup_replace_port = 0;
1894 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1895 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1897 /* If we are backup router and this is incoming server connection
1898 and we do not have connection to primary router, do not allow
1900 if (server->server_type == SILC_BACKUP_ROUTER &&
1901 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1902 !SILC_PRIMARY_ROUTE(server)) {
1903 SILC_LOG_INFO(("Will not accept server connection because we do "
1904 "not have primary router connection established"));
1905 silc_server_disconnect_remote(server, sock,
1906 SILC_STATUS_ERR_PERM_DENIED,
1907 "We do not have connection to primary "
1908 "router established, try later");
1909 silc_free(sock->user_data);
1910 server->stat.auth_failures++;
1914 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1915 /* Verify whether this connection is after all allowed to connect */
1916 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1917 &server->config->param,
1918 rconn ? rconn->param : NULL,
1920 silc_free(sock->user_data);
1921 server->stat.auth_failures++;
1927 param = rconn->param;
1929 if (!param->keepalive_secs)
1930 param->keepalive_secs = server->config->param.keepalive_secs;
1932 if (!param->qos && server->config->param.qos) {
1933 param->qos = server->config->param.qos;
1934 param->qos_rate_limit = server->config->param.qos_rate_limit;
1935 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1936 param->qos_limit_sec = server->config->param.qos_limit_sec;
1937 param->qos_limit_usec = server->config->param.qos_limit_usec;
1941 initiator = rconn->initiator;
1942 backup_local = rconn->backup_local;
1943 backup_router = rconn->backup_router;
1944 backup_replace_ip = rconn->backup_replace_ip;
1945 backup_replace_port = rconn->backup_replace_port;
1949 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1950 /* Verify whether this connection is after all allowed to connect */
1951 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1952 &server->config->param,
1953 sconn ? sconn->param : NULL,
1955 silc_free(sock->user_data);
1956 server->stat.auth_failures++;
1961 param = sconn->param;
1963 if (!param->keepalive_secs)
1964 param->keepalive_secs = server->config->param.keepalive_secs;
1966 if (!param->qos && server->config->param.qos) {
1967 param->qos = server->config->param.qos;
1968 param->qos_rate_limit = server->config->param.qos_rate_limit;
1969 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1970 param->qos_limit_sec = server->config->param.qos_limit_sec;
1971 param->qos_limit_usec = server->config->param.qos_limit_usec;
1975 backup_router = sconn->backup_router;
1979 /* If we are primary router and we have backup router configured
1980 but it has not connected to use yet, do not accept any other
1982 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1983 !server->backup_router && !backup_router) {
1984 SilcServerConfigRouter *router;
1985 router = silc_server_config_get_backup_router(server);
1986 if (router && strcmp(server->config->server_info->primary->server_ip,
1988 silc_server_find_socket_by_host(server,
1989 SILC_SOCKET_TYPE_SERVER,
1990 router->backup_replace_ip, 0)) {
1991 SILC_LOG_INFO(("Will not accept connections because we do "
1992 "not have backup router connection established"));
1993 silc_server_disconnect_remote(server, sock,
1994 SILC_STATUS_ERR_PERM_DENIED,
1995 "We do not have connection to backup "
1996 "router established, try later");
1997 silc_free(sock->user_data);
1998 server->stat.auth_failures++;
2000 /* From here on, wait 10 seconds for the backup router to appear. */
2001 silc_schedule_task_add(server->schedule, 0,
2002 silc_server_backup_router_wait,
2003 (void *)server, 10, 0,
2004 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2009 SILC_LOG_DEBUG(("Remote host is %s",
2010 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2011 "server" : (backup_router ?
2012 "backup router" : "router")));
2013 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2014 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2015 "server" : (backup_router ?
2016 "backup router" : "router")));
2018 /* Add the server into server cache. The server name and Server ID
2019 is updated after we have received NEW_SERVER packet from the
2020 server. We mark ourselves as router for this server if we really
2023 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2024 server->local_list : (backup_router ?
2025 server->local_list :
2026 server->global_list)),
2028 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2029 SILC_SERVER : SILC_ROUTER),
2031 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2032 server->id_entry : (backup_router ?
2033 server->id_entry : NULL)),
2036 SILC_LOG_ERROR(("Could not add new server to cache"));
2037 silc_free(sock->user_data);
2038 silc_server_disconnect_remote(server, sock,
2039 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2040 server->stat.auth_failures++;
2043 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2045 id_entry = (void *)new_server;
2047 /* If the incoming connection is router and marked as backup router
2048 then add it to be one of our backups */
2049 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2050 /* Change it back to SERVER type since that's what it really is. */
2052 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2053 new_server->server_type = SILC_BACKUP_ROUTER;
2055 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2056 ("Backup router %s is now online",
2059 /* Remove the backup waiting with timeout */
2060 silc_schedule_task_add(server->schedule, 0,
2061 silc_server_backup_router_wait,
2062 (void *)server, 5, 0,
2063 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2067 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2068 server->stat.my_servers++;
2070 server->stat.my_routers++;
2071 server->stat.routers++;
2073 server->stat.servers++;
2075 /* Check whether this connection is to be our primary router connection
2076 if we do not already have the primary route. */
2077 if (!backup_router &&
2078 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2079 if (silc_server_config_is_primary_route(server) && !initiator)
2082 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2083 server->standalone = FALSE;
2084 if (!server->id_entry->router) {
2085 server->id_entry->router = id_entry;
2086 server->router = id_entry;
2097 sock->type = ctx->conn_type;
2099 /* Add the common data structure to the ID entry. */
2100 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2102 /* Add to sockets internal pointer for fast referencing */
2103 silc_free(sock->user_data);
2104 sock->user_data = id_entry;
2106 /* Connection has been fully established now. Everything is ok. */
2107 SILC_LOG_DEBUG(("New connection authenticated"));
2109 /* Perform keepalive. */
2110 if (param->keepalive_secs)
2111 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2112 silc_server_perform_heartbeat,
2115 /* Perform Quality of Service */
2117 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2118 param->qos_limit_sec, param->qos_limit_usec,
2122 silc_protocol_free(protocol);
2124 silc_packet_context_free(ctx->packet);
2126 silc_ske_free(ctx->ske);
2127 silc_free(ctx->dest_id);
2128 silc_server_config_unref(&ctx->cconfig);
2129 silc_server_config_unref(&ctx->sconfig);
2130 silc_server_config_unref(&ctx->rconfig);
2132 sock->protocol = NULL;
2135 /* This function is used to read packets from network and send packets to
2136 network. This is usually a generic task. */
2138 SILC_TASK_CALLBACK(silc_server_packet_process)
2140 SilcServer server = (SilcServer)context;
2141 SilcSocketConnection sock = server->sockets[fd];
2142 SilcIDListData idata;
2143 SilcCipher cipher = NULL;
2144 SilcHmac hmac = NULL;
2145 SilcUInt32 sequence = 0;
2146 bool local_is_router;
2150 SILC_LOG_DEBUG(("Unknown socket connection"));
2154 /* Packet sending */
2156 if (type == SILC_TASK_WRITE) {
2157 /* Do not send data to disconnected connection */
2158 if (SILC_IS_DISCONNECTED(sock)) {
2159 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2163 server->stat.packets_sent++;
2165 /* Send the packet */
2166 ret = silc_packet_send(sock, TRUE);
2168 /* If returned -2 could not write to connection now, will do
2173 /* The packet has been sent and now it is time to set the connection
2174 back to only for input. When there is again some outgoing data
2175 available for this connection it will be set for output as well.
2176 This call clears the output setting and sets it only for input. */
2177 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2178 SILC_UNSET_OUTBUF_PENDING(sock);
2179 silc_buffer_clear(sock->outbuf);
2182 SILC_LOG_ERROR(("Error sending packet to connection "
2183 "%s:%d [%s]", sock->hostname, sock->port,
2184 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2185 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2186 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2189 SILC_SET_DISCONNECTING(sock);
2190 if (sock->user_data)
2191 silc_server_free_sock_user_data(server, sock, NULL);
2192 silc_server_close_connection(server, sock);
2197 /* Packet receiving */
2199 /* Read some data from connection */
2200 ret = silc_packet_receive(sock);
2204 SILC_LOG_ERROR(("Error receiving packet from connection "
2205 "%s:%d [%s] %s", sock->hostname, sock->port,
2206 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2207 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2208 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2209 "Router"), strerror(errno)));
2211 SILC_SET_DISCONNECTING(sock);
2212 if (sock->user_data)
2213 silc_server_free_sock_user_data(server, sock, NULL);
2214 silc_server_close_connection(server, sock);
2221 SILC_LOG_DEBUG(("Read EOF"));
2223 /* If connection is disconnecting already we will finally
2224 close the connection */
2225 if (SILC_IS_DISCONNECTING(sock)) {
2226 if (sock->user_data)
2227 silc_server_free_sock_user_data(server, sock, NULL);
2228 silc_server_close_connection(server, sock);
2232 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2233 SILC_SET_DISCONNECTING(sock);
2235 if (sock->user_data) {
2237 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2238 silc_server_free_sock_user_data(server, sock, tmp);
2240 silc_server_free_sock_user_data(server, sock, NULL);
2241 } else if (server->router_conn && server->router_conn->sock == sock &&
2242 !server->router && server->standalone)
2243 silc_schedule_task_add(server->schedule, 0,
2244 silc_server_connect_to_router,
2247 SILC_TASK_PRI_NORMAL);
2249 silc_server_close_connection(server, sock);
2253 /* If connection is disconnecting or disconnected we will ignore
2255 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2256 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2260 /* Get keys and stuff from ID entry */
2261 idata = (SilcIDListData)sock->user_data;
2263 cipher = idata->receive_key;
2264 hmac = idata->hmac_receive;
2265 sequence = idata->psn_receive;
2268 /* Then, process the packet. This will call the parser that will then
2269 decrypt and parse the packet. */
2271 local_is_router = (server->server_type == SILC_ROUTER);
2273 /* If socket connection is our primary, we are backup and we are doing
2274 backup resuming, we won't process the packet as being a router
2275 (affects channel message decryption). */
2276 if (server->backup_router && SILC_SERVER_IS_BACKUP(sock) &&
2277 SILC_PRIMARY_ROUTE(server) == sock)
2278 local_is_router = FALSE;
2280 ret = silc_packet_receive_process(sock, local_is_router,
2281 cipher, hmac, sequence,
2282 silc_server_packet_parse, server);
2284 /* If processing failed the connection is closed. */
2286 /* On packet processing errors we may close our primary router
2287 connection but won't become primary router if we are the backup
2288 since this is local error condition. */
2289 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2290 server->backup_noswitch = TRUE;
2292 SILC_SET_DISCONNECTING(sock);
2293 if (sock->user_data)
2294 silc_server_free_sock_user_data(server, sock, NULL);
2295 silc_server_close_connection(server, sock);
2299 /* Parses whole packet, received earlier. */
2301 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2303 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2304 SilcServer server = (SilcServer)parse_ctx->context;
2305 SilcSocketConnection sock = parse_ctx->sock;
2306 SilcPacketContext *packet = parse_ctx->packet;
2307 SilcIDListData idata = (SilcIDListData)sock->user_data;
2310 server->stat.packets_received++;
2312 /* Parse the packet */
2313 if (parse_ctx->normal)
2314 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2316 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2318 /* If entry is disabled ignore what we got. */
2319 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2320 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2321 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2322 SILC_LOG_DEBUG(("Connection is disabled"));
2326 if (ret == SILC_PACKET_NONE) {
2327 SILC_LOG_DEBUG(("Error parsing packet"));
2331 /* Check that the the current client ID is same as in the client's packet. */
2332 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2333 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2334 if (client && client->id && packet->src_id) {
2335 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2336 packet->src_id_type);
2337 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2339 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2346 if (server->server_type == SILC_ROUTER) {
2347 /* Route the packet if it is not destined to us. Other ID types but
2348 server are handled separately after processing them. */
2349 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2350 packet->dst_id_type == SILC_ID_SERVER &&
2351 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2352 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2354 /* Route the packet to fastest route for the destination ID */
2355 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2356 packet->dst_id_type);
2359 silc_server_packet_route(server,
2360 silc_server_route_get(server, id,
2361 packet->dst_id_type),
2368 /* Parse the incoming packet type */
2369 silc_server_packet_parse_type(server, sock, packet);
2371 /* Broadcast packet if it is marked as broadcast packet and it is
2372 originated from router and we are router. */
2373 if (server->server_type == SILC_ROUTER &&
2374 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2375 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2376 /* Broadcast to our primary route */
2377 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2379 /* If we have backup routers then we need to feed all broadcast
2380 data to those servers. */
2381 silc_server_backup_broadcast(server, sock, packet);
2385 silc_packet_context_free(packet);
2386 silc_free(parse_ctx);
2389 /* Parser callback called by silc_packet_receive_process. This merely
2390 registers timeout that will handle the actual parsing when appropriate. */
2392 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2395 SilcServer server = (SilcServer)context;
2396 SilcSocketConnection sock = parser_context->sock;
2397 SilcIDListData idata = (SilcIDListData)sock->user_data;
2401 idata->psn_receive = parser_context->packet->sequence + 1;
2403 /* If protocol for this connection is key exchange or rekey then we'll
2404 process all packets synchronously, since there might be packets in
2405 queue that we are not able to decrypt without first processing the
2406 packets before them. */
2407 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2408 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2409 (sock->protocol && sock->protocol->protocol &&
2410 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2411 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2412 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2415 /* Reprocess data since we'll return FALSE here. This is because
2416 the idata->receive_key might have become valid in the last packet
2417 and we want to call this processor with valid cipher. */
2419 ret = silc_packet_receive_process(
2420 sock, server->server_type == SILC_ROUTER,
2422 idata->hmac_receive, idata->psn_receive,
2423 silc_server_packet_parse, server);
2425 ret = silc_packet_receive_process(
2426 sock, server->server_type == SILC_ROUTER,
2428 silc_server_packet_parse, server);
2431 /* On packet processing errors we may close our primary router
2432 connection but won't become primary router if we are the backup
2433 since this is local error condition. */
2434 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2435 server->backup_noswitch = TRUE;
2437 SILC_SET_DISCONNECTING(sock);
2438 if (sock->user_data)
2439 silc_server_free_sock_user_data(server, sock, NULL);
2440 silc_server_close_connection(server, sock);
2446 switch (sock->type) {
2447 case SILC_SOCKET_TYPE_UNKNOWN:
2448 case SILC_SOCKET_TYPE_CLIENT:
2449 /* Parse the packet with timeout */
2450 silc_schedule_task_add(server->schedule, sock->sock,
2451 silc_server_packet_parse_real,
2452 (void *)parser_context, 0, 100000,
2454 SILC_TASK_PRI_NORMAL);
2456 case SILC_SOCKET_TYPE_SERVER:
2457 case SILC_SOCKET_TYPE_ROUTER:
2458 /* Packets from servers are parsed immediately */
2459 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2469 /* Parses the packet type and calls what ever routines the packet type
2470 requires. This is done for all incoming packets. */
2472 void silc_server_packet_parse_type(SilcServer server,
2473 SilcSocketConnection sock,
2474 SilcPacketContext *packet)
2476 SilcPacketType type = packet->type;
2477 SilcIDListData idata = (SilcIDListData)sock->user_data;
2479 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2480 silc_get_packet_name(type), packet->flags));
2482 /* Parse the packet type */
2484 case SILC_PACKET_DISCONNECT:
2487 char *message = NULL;
2489 if (packet->flags & SILC_PACKET_FLAG_LIST)
2491 if (packet->buffer->len < 1)
2494 status = (SilcStatus)packet->buffer->data[0];
2495 if (packet->buffer->len > 1 &&
2496 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2497 message = silc_memdup(packet->buffer->data + 1,
2498 packet->buffer->len - 1);
2500 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2501 sock->ip, sock->hostname,
2502 silc_get_status_message(status), status,
2503 message ? message : ""));
2506 /* Handle the disconnection from our end too */
2507 SILC_SET_DISCONNECTING(sock);
2508 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2509 silc_server_free_sock_user_data(server, sock, NULL);
2510 silc_server_close_connection(server, sock);
2514 case SILC_PACKET_SUCCESS:
2516 * Success received for something. For now we can have only
2517 * one protocol for connection executing at once hence this
2518 * success message is for whatever protocol is executing currently.
2520 if (packet->flags & SILC_PACKET_FLAG_LIST)
2523 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2526 case SILC_PACKET_FAILURE:
2528 * Failure received for something. For now we can have only
2529 * one protocol for connection executing at once hence this
2530 * failure message is for whatever protocol is executing currently.
2532 if (packet->flags & SILC_PACKET_FLAG_LIST)
2534 if (sock->protocol) {
2535 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
2536 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2540 case SILC_PACKET_REJECT:
2541 if (packet->flags & SILC_PACKET_FLAG_LIST)
2546 case SILC_PACKET_NOTIFY:
2548 * Received notify packet. Server can receive notify packets from
2549 * router. Server then relays the notify messages to clients if needed.
2551 if (packet->flags & SILC_PACKET_FLAG_LIST)
2552 silc_server_notify_list(server, sock, packet);
2554 silc_server_notify(server, sock, packet);
2560 case SILC_PACKET_CHANNEL_MESSAGE:
2562 * Received channel message. Channel messages are special packets
2563 * (although probably most common ones) thus they are handled
2566 if (packet->flags & SILC_PACKET_FLAG_LIST)
2568 idata->last_receive = time(NULL);
2569 silc_server_channel_message(server, sock, packet);
2572 case SILC_PACKET_CHANNEL_KEY:
2574 * Received key for channel. As channels are created by the router
2575 * the keys are as well. We will distribute the key to all of our
2576 * locally connected clients on the particular channel. Router
2577 * never receives this channel and thus is ignored.
2579 if (packet->flags & SILC_PACKET_FLAG_LIST)
2581 silc_server_channel_key(server, sock, packet);
2587 case SILC_PACKET_COMMAND:
2589 * Recived command. Processes the command request and allocates the
2590 * command context and calls the command.
2592 if (packet->flags & SILC_PACKET_FLAG_LIST)
2594 silc_server_command_process(server, sock, packet);
2597 case SILC_PACKET_COMMAND_REPLY:
2599 * Received command reply packet. Received command reply to command. It
2600 * may be reply to command sent by us or reply to command sent by client
2601 * that we've routed further.
2603 if (packet->flags & SILC_PACKET_FLAG_LIST)
2605 silc_server_command_reply(server, sock, packet);
2609 * Private Message packets
2611 case SILC_PACKET_PRIVATE_MESSAGE:
2613 * Received private message packet. The packet is coming from either
2616 if (packet->flags & SILC_PACKET_FLAG_LIST)
2618 idata->last_receive = time(NULL);
2619 silc_server_private_message(server, sock, packet);
2622 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2624 * Private message key packet.
2626 if (packet->flags & SILC_PACKET_FLAG_LIST)
2628 silc_server_private_message_key(server, sock, packet);
2632 * Key Exchange protocol packets
2634 case SILC_PACKET_KEY_EXCHANGE:
2635 if (packet->flags & SILC_PACKET_FLAG_LIST)
2638 if (sock->protocol && sock->protocol->protocol &&
2639 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2640 SilcServerKEInternalContext *proto_ctx =
2641 (SilcServerKEInternalContext *)sock->protocol->context;
2643 proto_ctx->packet = silc_packet_context_dup(packet);
2645 /* Let the protocol handle the packet */
2646 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2648 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2649 "protocol active, packet dropped."));
2653 case SILC_PACKET_KEY_EXCHANGE_1:
2654 if (packet->flags & SILC_PACKET_FLAG_LIST)
2657 if (sock->protocol && sock->protocol->protocol &&
2658 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2659 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2661 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2662 SilcServerRekeyInternalContext *proto_ctx =
2663 (SilcServerRekeyInternalContext *)sock->protocol->context;
2665 if (proto_ctx->packet)
2666 silc_packet_context_free(proto_ctx->packet);
2668 proto_ctx->packet = silc_packet_context_dup(packet);
2670 /* Let the protocol handle the packet */
2671 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2673 SilcServerKEInternalContext *proto_ctx =
2674 (SilcServerKEInternalContext *)sock->protocol->context;
2676 if (proto_ctx->packet)
2677 silc_packet_context_free(proto_ctx->packet);
2679 proto_ctx->packet = silc_packet_context_dup(packet);
2680 proto_ctx->dest_id_type = packet->src_id_type;
2681 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2682 packet->src_id_type);
2683 if (!proto_ctx->dest_id)
2686 /* Let the protocol handle the packet */
2687 silc_protocol_execute(sock->protocol, server->schedule,
2691 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2692 "protocol active, packet dropped."));
2696 case SILC_PACKET_KEY_EXCHANGE_2:
2697 if (packet->flags & SILC_PACKET_FLAG_LIST)
2700 if (sock->protocol && sock->protocol->protocol &&
2701 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2702 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2704 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2705 SilcServerRekeyInternalContext *proto_ctx =
2706 (SilcServerRekeyInternalContext *)sock->protocol->context;
2708 if (proto_ctx->packet)
2709 silc_packet_context_free(proto_ctx->packet);
2711 proto_ctx->packet = silc_packet_context_dup(packet);
2713 /* Let the protocol handle the packet */
2714 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2716 SilcServerKEInternalContext *proto_ctx =
2717 (SilcServerKEInternalContext *)sock->protocol->context;
2719 if (proto_ctx->packet)
2720 silc_packet_context_free(proto_ctx->packet);
2722 proto_ctx->packet = silc_packet_context_dup(packet);
2723 proto_ctx->dest_id_type = packet->src_id_type;
2724 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2725 packet->src_id_type);
2726 if (!proto_ctx->dest_id)
2729 /* Let the protocol handle the packet */
2730 silc_protocol_execute(sock->protocol, server->schedule,
2734 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2735 "protocol active, packet dropped."));
2739 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2741 * Connection authentication request packet. When we receive this packet
2742 * we will send to the other end information about our mandatory
2743 * authentication method for the connection. This packet maybe received
2746 if (packet->flags & SILC_PACKET_FLAG_LIST)
2748 silc_server_connection_auth_request(server, sock, packet);
2752 * Connection Authentication protocol packets
2754 case SILC_PACKET_CONNECTION_AUTH:
2755 /* Start of the authentication protocol. We receive here the
2756 authentication data and will verify it. */
2757 if (packet->flags & SILC_PACKET_FLAG_LIST)
2760 if (sock->protocol && sock->protocol->protocol->type
2761 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2763 SilcServerConnAuthInternalContext *proto_ctx =
2764 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2766 proto_ctx->packet = silc_packet_context_dup(packet);
2768 /* Let the protocol handle the packet */
2769 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2771 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2772 "protocol active, packet dropped."));
2776 case SILC_PACKET_NEW_ID:
2778 * Received New ID packet. This includes some new ID that has been
2779 * created. It may be for client, server or channel. This is the way
2780 * to distribute information about new registered entities in the
2783 if (packet->flags & SILC_PACKET_FLAG_LIST)
2784 silc_server_new_id_list(server, sock, packet);
2786 silc_server_new_id(server, sock, packet);
2789 case SILC_PACKET_NEW_CLIENT:
2791 * Received new client packet. This includes client information that
2792 * we will use to create initial client ID. After creating new
2793 * ID we will send it to the client.
2795 if (packet->flags & SILC_PACKET_FLAG_LIST)
2797 silc_server_new_client(server, sock, packet);
2800 case SILC_PACKET_NEW_SERVER:
2802 * Received new server packet. This includes Server ID and some other
2803 * information that we may save. This is received after server has
2806 if (packet->flags & SILC_PACKET_FLAG_LIST)
2808 silc_server_new_server(server, sock, packet);
2811 case SILC_PACKET_NEW_CHANNEL:
2813 * Received new channel packet. Information about new channel in the
2814 * network are distributed using this packet.
2816 if (packet->flags & SILC_PACKET_FLAG_LIST)
2817 silc_server_new_channel_list(server, sock, packet);
2819 silc_server_new_channel(server, sock, packet);
2822 case SILC_PACKET_HEARTBEAT:
2824 * Received heartbeat.
2826 if (packet->flags & SILC_PACKET_FLAG_LIST)
2830 case SILC_PACKET_KEY_AGREEMENT:
2832 * Received heartbeat.
2834 if (packet->flags & SILC_PACKET_FLAG_LIST)
2836 silc_server_key_agreement(server, sock, packet);
2839 case SILC_PACKET_REKEY:
2841 * Received re-key packet. The sender wants to regenerate the session
2844 if (packet->flags & SILC_PACKET_FLAG_LIST)
2846 silc_server_rekey(server, sock, packet);
2849 case SILC_PACKET_REKEY_DONE:
2851 * The re-key is done.
2853 if (packet->flags & SILC_PACKET_FLAG_LIST)
2856 if (sock->protocol && sock->protocol->protocol &&
2857 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2859 SilcServerRekeyInternalContext *proto_ctx =
2860 (SilcServerRekeyInternalContext *)sock->protocol->context;
2862 if (proto_ctx->packet)
2863 silc_packet_context_free(proto_ctx->packet);
2865 proto_ctx->packet = silc_packet_context_dup(packet);
2867 /* Let the protocol handle the packet */
2868 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2870 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2871 "protocol active, packet dropped."));
2875 case SILC_PACKET_FTP:
2877 if (packet->flags & SILC_PACKET_FLAG_LIST)
2879 silc_server_ftp(server, sock, packet);
2882 case SILC_PACKET_RESUME_CLIENT:
2884 if (packet->flags & SILC_PACKET_FLAG_LIST)
2886 silc_server_resume_client(server, sock, packet);
2889 case SILC_PACKET_RESUME_ROUTER:
2890 /* Resume router packet received. This packet is received for backup
2891 router resuming protocol. */
2892 if (packet->flags & SILC_PACKET_FLAG_LIST)
2894 silc_server_backup_resume_router(server, sock, packet);
2898 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2903 /* Creates connection to a remote router. */
2905 void silc_server_create_connection(SilcServer server,
2906 const char *remote_host, SilcUInt32 port)
2908 SilcServerConnection sconn;
2910 /* Allocate connection object for hold connection specific stuff. */
2911 sconn = silc_calloc(1, sizeof(*sconn));
2912 sconn->remote_host = strdup(remote_host);
2913 sconn->remote_port = port;
2914 sconn->no_reconnect = TRUE;
2916 silc_schedule_task_add(server->schedule, 0,
2917 silc_server_connect_router,
2918 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2919 SILC_TASK_PRI_NORMAL);
2922 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2924 silc_socket_free(context);
2927 /* Closes connection to socket connection */
2929 void silc_server_close_connection(SilcServer server,
2930 SilcSocketConnection sock)
2934 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2935 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2936 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2937 silc_net_close_connection(sock->sock);
2938 silc_schedule_task_add(server->schedule, sock->sock,
2939 silc_server_close_connection_final,
2940 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2941 SILC_TASK_PRI_NORMAL);
2945 memset(tmp, 0, sizeof(tmp));
2946 silc_socket_get_error(sock, tmp, sizeof(tmp));
2947 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2949 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2950 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2951 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2952 "Router"), tmp[0] ? tmp : ""));
2954 /* Unregister all tasks */
2955 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2957 server->sockets[sock->sock] = NULL;
2959 /* If sock->user_data is NULL then we'll check for active protocols
2960 here since the silc_server_free_sock_user_data has not been called
2961 for this connection. */
2962 if (!sock->user_data) {
2963 /* If any protocol is active cancel its execution. It will call
2964 the final callback which will finalize the disconnection. */
2965 if (sock->protocol && sock->protocol->protocol &&
2966 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
2967 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2968 silc_protocol_cancel(sock->protocol, server->schedule);
2969 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2970 silc_protocol_execute_final(sock->protocol, server->schedule);
2971 sock->protocol = NULL;
2976 /* Close the actual connection */
2977 silc_net_close_connection(sock->sock);
2979 /* We won't listen for this connection anymore */
2980 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2982 silc_schedule_task_add(server->schedule, sock->sock,
2983 silc_server_close_connection_final,
2984 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2985 SILC_TASK_PRI_NORMAL);
2988 /* Sends disconnect message to remote connection and disconnects the
2991 void silc_server_disconnect_remote(SilcServer server,
2992 SilcSocketConnection sock,
2993 SilcStatus status, ...)
2996 unsigned char buf[512];
3004 if (SILC_IS_DISCONNECTED(sock)) {
3005 silc_server_close_connection(server, sock);
3009 memset(buf, 0, sizeof(buf));
3010 va_start(ap, status);
3011 cp = va_arg(ap, char *);
3013 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3018 SILC_LOG_DEBUG(("Disconnecting remote host"));
3020 /* Notify remote end that the conversation is over. The notify message
3021 is tried to be sent immediately. */
3025 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3027 buffer = silc_buffer_alloc_size(len);
3031 buffer->data[0] = status;
3033 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3035 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3036 buffer->data, buffer->len, TRUE);
3037 silc_buffer_free(buffer);
3040 silc_server_packet_queue_purge(server, sock);
3042 /* Mark the connection to be disconnected */
3043 SILC_SET_DISCONNECTED(sock);
3044 silc_server_close_connection(server, sock);
3047 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3049 SilcServer server = app_context;
3050 SilcClientEntry client = context;
3052 assert(!silc_hash_table_count(client->channels));
3054 silc_idlist_del_data(client);
3055 silc_idcache_purge_by_context(server->local_list->clients, client);
3058 /* Frees client data and notifies about client's signoff. */
3060 void silc_server_free_client_data(SilcServer server,
3061 SilcSocketConnection sock,
3062 SilcClientEntry client,
3064 const char *signoff)
3066 SILC_LOG_DEBUG(("Freeing client data"));
3068 /* If there is pending outgoing data for the client then purge it
3069 to the network before removing the client entry. */
3070 silc_server_packet_queue_purge(server, sock);
3073 /* Check if anyone is watching this nickname */
3074 if (server->server_type == SILC_ROUTER)
3075 silc_server_check_watcher_list(server, client, NULL,
3076 SILC_NOTIFY_TYPE_SIGNOFF);
3078 /* Send SIGNOFF notify to routers. */
3080 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3081 SILC_BROADCAST(server), client->id,
3085 /* Remove client from all channels */
3087 silc_server_remove_from_channels(server, NULL, client,
3088 TRUE, (char *)signoff, TRUE, FALSE);
3090 silc_server_remove_from_channels(server, NULL, client,
3091 FALSE, NULL, FALSE, FALSE);
3093 /* Remove this client from watcher list if it is */
3094 silc_server_del_from_watcher_list(server, client);
3096 /* Update statistics */
3097 server->stat.my_clients--;
3098 server->stat.clients--;
3099 if (server->stat.cell_clients)
3100 server->stat.cell_clients--;
3101 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3102 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3103 silc_schedule_task_del_by_context(server->schedule, client);
3105 /* We will not delete the client entry right away. We will take it
3106 into history (for WHOWAS command) for 5 minutes, unless we're
3107 shutting down server. */
3108 if (!server->server_shutdown) {
3109 silc_schedule_task_add(server->schedule, 0,
3110 silc_server_free_client_data_timeout,
3112 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3113 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3114 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3116 client->router = NULL;
3117 client->connection = NULL;
3119 /* Delete directly since we're shutting down server */
3120 silc_idlist_del_data(client);
3121 silc_idlist_del_client(server->local_list, client);
3125 /* Frees user_data pointer from socket connection object. This also sends
3126 appropriate notify packets to the network to inform about leaving
3129 void silc_server_free_sock_user_data(SilcServer server,
3130 SilcSocketConnection sock,
3131 const char *signoff_message)
3133 switch (sock->type) {
3134 case SILC_SOCKET_TYPE_CLIENT:
3136 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3137 silc_server_free_client_data(server, sock, user_data, TRUE,
3141 case SILC_SOCKET_TYPE_SERVER:
3142 case SILC_SOCKET_TYPE_ROUTER:
3144 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3145 SilcServerEntry backup_router = NULL;
3147 SILC_LOG_DEBUG(("Freeing server data"));
3150 backup_router = silc_server_backup_get(server, user_data->id);
3152 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3153 backup_router == server->id_entry &&
3154 sock->type != SILC_SOCKET_TYPE_ROUTER)
3155 backup_router = NULL;
3157 if (server->server_shutdown || server->backup_noswitch)
3158 backup_router = NULL;
3160 /* If this was our primary router connection then we're lost to
3161 the outside world. */
3162 if (server->router == user_data) {
3163 /* Check whether we have a backup router connection */
3164 if (!backup_router || backup_router == user_data) {
3165 silc_schedule_task_add(server->schedule, 0,
3166 silc_server_connect_to_router,
3169 SILC_TASK_PRI_NORMAL);
3171 server->id_entry->router = NULL;
3172 server->router = NULL;
3173 server->standalone = TRUE;
3174 server->backup_primary = FALSE;
3175 backup_router = NULL;
3177 if (server->id_entry != backup_router) {
3178 SILC_LOG_INFO(("New primary router is backup router %s",
3179 backup_router->server_name));
3180 server->id_entry->router = backup_router;
3181 server->router = backup_router;
3182 server->router_connect = time(0);
3183 server->backup_primary = TRUE;
3185 SILC_LOG_INFO(("We are now new primary router in this cell"));
3186 server->id_entry->router = NULL;
3187 server->router = NULL;
3188 server->standalone = TRUE;
3190 /* We stop here to take a breath */
3194 if (server->server_type == SILC_BACKUP_ROUTER) {
3195 server->server_type = SILC_ROUTER;
3197 /* We'll need to constantly try to reconnect to the primary
3198 router so that we'll see when it comes back online. */
3199 silc_server_backup_reconnect(server, sock->ip, sock->port,
3200 silc_server_backup_connected,
3204 /* Mark this connection as replaced */
3205 silc_server_backup_replaced_add(server, user_data->id,
3208 } else if (backup_router) {
3209 SILC_LOG_INFO(("Enabling the use of backup router %s",
3210 backup_router->server_name));
3212 /* Mark this connection as replaced */
3213 silc_server_backup_replaced_add(server, user_data->id,
3215 } else if (server->server_type == SILC_SERVER &&
3216 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3217 /* Reconnect to the router (backup) */
3218 silc_schedule_task_add(server->schedule, 0,
3219 silc_server_connect_to_router,
3222 SILC_TASK_PRI_NORMAL);
3225 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3226 ("Server %s signoff", user_data->server_name));
3228 if (!backup_router) {
3229 /* Remove all servers that are originated from this server, and
3230 remove the clients of those servers too. */
3231 silc_server_remove_servers_by_server(server, user_data, TRUE);
3234 /* Remove the clients that this server owns as they will become
3235 invalid now too. For backup router the server is actually
3236 coming from the primary router, so mark that as the owner
3238 if (server->server_type == SILC_BACKUP_ROUTER &&
3239 sock->type == SILC_SOCKET_TYPE_SERVER)
3240 silc_server_remove_clients_by_server(server, server->router,
3244 silc_server_remove_clients_by_server(server, user_data,
3247 /* Remove channels owned by this server */
3248 if (server->server_type == SILC_SERVER)
3249 silc_server_remove_channels_by_server(server, user_data);
3251 /* Enable local server connections that may be disabled */
3252 silc_server_local_servers_toggle_enabled(server, TRUE);
3254 /* Update the client entries of this server to the new backup
3255 router. If we are the backup router we also resolve the real
3256 servers for the clients. After updating is over this also
3257 removes the clients that this server explicitly owns. */
3258 silc_server_update_clients_by_server(server, user_data,
3259 backup_router, TRUE);
3261 /* If we are router and just lost our primary router (now standlaone)
3262 we remove everything that was behind it, since we don't know
3264 if (server->server_type == SILC_ROUTER && server->standalone)
3265 /* Remove all servers that are originated from this server, and
3266 remove the clients of those servers too. */
3267 silc_server_remove_servers_by_server(server, user_data, TRUE);
3269 /* Finally remove the clients that are explicitly owned by this
3270 server. They go down with the server. */
3271 silc_server_remove_clients_by_server(server, user_data,
3274 /* Update our server cache to use the new backup router too. */
3275 silc_server_update_servers_by_server(server, user_data, backup_router);
3276 if (server->server_type == SILC_SERVER)
3277 silc_server_update_channels_by_server(server, user_data,
3280 /* Send notify about primary router going down to local operators */
3281 if (server->backup_router)
3282 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3283 SILC_NOTIFY_TYPE_NONE,
3284 ("%s switched to backup router %s "
3285 "(we are primary router now)",
3286 server->server_name, server->server_name));
3287 else if (server->router)
3288 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3289 SILC_NOTIFY_TYPE_NONE,
3290 ("%s switched to backup router %s",
3291 server->server_name,
3292 server->router->server_name));
3294 server->backup_noswitch = FALSE;
3296 /* Free the server entry */
3297 silc_server_backup_del(server, user_data);
3298 silc_server_backup_replaced_del(server, user_data);
3299 silc_idlist_del_data(user_data);
3300 if (!silc_idlist_del_server(server->local_list, user_data))
3301 silc_idlist_del_server(server->global_list, user_data);
3302 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3303 server->stat.my_servers--;
3305 server->stat.my_routers--;
3306 server->stat.routers--;
3308 server->stat.servers--;
3309 if (server->server_type == SILC_ROUTER)
3310 server->stat.cell_servers--;
3312 if (backup_router && backup_router != server->id_entry) {
3313 /* Announce all of our stuff that was created about 5 minutes ago.
3314 The backup router knows all the other stuff already. */
3315 if (server->server_type == SILC_ROUTER)
3316 silc_server_announce_servers(server, FALSE, time(0) - 300,
3317 backup_router->connection);
3319 /* Announce our clients and channels to the router */
3320 silc_server_announce_clients(server, time(0) - 300,
3321 backup_router->connection);
3322 silc_server_announce_channels(server, time(0) - 300,
3323 backup_router->connection);
3329 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3331 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3333 silc_idlist_del_data(user_data);
3334 silc_free(user_data);
3339 /* If any protocol is active cancel its execution */
3340 if (sock->protocol && sock->protocol->protocol &&
3341 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3342 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3343 silc_protocol_cancel(sock->protocol, server->schedule);
3344 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3345 silc_protocol_execute_final(sock->protocol, server->schedule);
3346 sock->protocol = NULL;
3349 sock->user_data = NULL;
3352 /* Removes client from all channels it has joined. This is used when client
3353 connection is disconnected. If the client on a channel is last, the
3354 channel is removed as well. This sends the SIGNOFF notify types. */
3356 void silc_server_remove_from_channels(SilcServer server,
3357 SilcSocketConnection sock,
3358 SilcClientEntry client,
3360 const char *signoff_message,
3364 SilcChannelEntry channel;
3365 SilcChannelClientEntry chl;
3366 SilcHashTableList htl;
3367 SilcBuffer clidp = NULL;
3372 SILC_LOG_DEBUG(("Removing client from joined channels"));
3374 if (notify && !client->id)
3378 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3383 /* Remove the client from all channels. The client is removed from
3384 the channels' user list. */
3385 silc_hash_table_list(client->channels, &htl);
3386 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3387 channel = chl->channel;
3389 /* Remove channel if this is last client leaving the channel, unless
3390 the channel is permanent. */
3391 if (server->server_type != SILC_SERVER &&
3392 silc_hash_table_count(channel->user_list) < 2) {
3393 silc_server_channel_delete(server, channel);
3397 silc_hash_table_del(client->channels, channel);
3398 silc_hash_table_del(channel->user_list, client);
3399 channel->user_count--;
3401 /* If there is no global users on the channel anymore mark the channel
3402 as local channel. Do not check if the removed client is local client. */
3403 if (server->server_type == SILC_SERVER && channel->global_users &&
3404 chl->client->router && !silc_server_channel_has_global(channel))
3405 channel->global_users = FALSE;
3407 memset(chl, 'A', sizeof(*chl));
3410 /* Update statistics */
3411 if (SILC_IS_LOCAL(client))
3412 server->stat.my_chanclients--;
3413 if (server->server_type == SILC_ROUTER) {
3414 server->stat.cell_chanclients--;
3415 server->stat.chanclients--;
3418 /* If there is not at least one local user on the channel then we don't
3419 need the channel entry anymore, we can remove it safely, unless the
3420 channel is permanent channel */
3421 if (server->server_type == SILC_SERVER &&
3422 !silc_server_channel_has_local(channel)) {
3423 /* Notify about leaving client if this channel has global users. */
3424 if (notify && channel->global_users)
3425 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3426 SILC_NOTIFY_TYPE_SIGNOFF,
3427 signoff_message ? 2 : 1,
3428 clidp->data, clidp->len,
3429 signoff_message, signoff_message ?
3430 strlen(signoff_message) : 0);
3432 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3433 silc_server_channel_delete(server, channel);
3437 /* Send notify to channel about client leaving SILC and channel too */
3439 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3440 SILC_NOTIFY_TYPE_SIGNOFF,
3441 signoff_message ? 2 : 1,
3442 clidp->data, clidp->len,
3443 signoff_message, signoff_message ?
3444 strlen(signoff_message) : 0);
3446 if (killed && clidp) {
3447 /* Remove the client from channel's invite list */
3448 if (channel->invite_list &&
3449 silc_hash_table_count(channel->invite_list)) {
3451 SilcArgumentPayload iargs;
3452 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3454 iargs = silc_argument_payload_parse(ab->data, ab->len, 1);
3455 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3456 silc_buffer_free(ab);
3457 silc_argument_payload_free(iargs);
3461 /* Don't create keys if we are shutting down */
3462 if (server->server_shutdown)
3465 /* Re-generate channel key if needed */
3466 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3467 if (!silc_server_create_channel_key(server, channel, 0))
3470 /* Send the channel key to the channel. The key of course is not sent
3471 to the client who was removed from the channel. */
3472 silc_server_send_channel_key(server, client->connection, channel,
3473 server->server_type == SILC_ROUTER ?
3474 FALSE : !server->standalone);
3478 silc_hash_table_list_reset(&htl);
3480 silc_buffer_free(clidp);
3483 /* Removes client from one channel. This is used for example when client
3484 calls LEAVE command to remove itself from the channel. Returns TRUE
3485 if channel still exists and FALSE if the channel is removed when
3486 last client leaves the channel. If `notify' is FALSE notify messages
3489 bool silc_server_remove_from_one_channel(SilcServer server,
3490 SilcSocketConnection sock,
3491 SilcChannelEntry channel,
3492 SilcClientEntry client,
3495 SilcChannelClientEntry chl;
3498 SILC_LOG_DEBUG(("Removing %s from channel %s",
3499 silc_id_render(client->id, SILC_ID_CLIENT),
3500 channel->channel_name));
3502 /* Get the entry to the channel, if this client is not on the channel
3504 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3507 /* Remove channel if this is last client leaving the channel, unless
3508 the channel is permanent. */
3509 if (server->server_type != SILC_SERVER &&
3510 silc_hash_table_count(channel->user_list) < 2) {
3511 silc_server_channel_delete(server, channel);
3515 silc_hash_table_del(client->channels, channel);
3516 silc_hash_table_del(channel->user_list, client);
3517 channel->user_count--;
3519 /* If there is no global users on the channel anymore mark the channel
3520 as local channel. Do not check if the client is local client. */
3521 if (server->server_type == SILC_SERVER && channel->global_users &&
3522 chl->client->router && !silc_server_channel_has_global(channel))
3523 channel->global_users = FALSE;
3525 memset(chl, 'O', sizeof(*chl));
3528 /* Update statistics */
3529 if (SILC_IS_LOCAL(client))
3530 server->stat.my_chanclients--;
3531 if (server->server_type == SILC_ROUTER) {
3532 server->stat.cell_chanclients--;
3533 server->stat.chanclients--;
3536 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3540 /* If there is not at least one local user on the channel then we don't
3541 need the channel entry anymore, we can remove it safely, unless the
3542 channel is permanent channel */
3543 if (server->server_type == SILC_SERVER &&
3544 !silc_server_channel_has_local(channel)) {
3545 /* Notify about leaving client if this channel has global users. */
3546 if (notify && channel->global_users)
3547 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3548 SILC_NOTIFY_TYPE_LEAVE, 1,
3549 clidp->data, clidp->len);
3551 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3552 silc_server_channel_delete(server, channel);
3553 silc_buffer_free(clidp);
3557 /* Send notify to channel about client leaving the channel */
3559 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3560 SILC_NOTIFY_TYPE_LEAVE, 1,
3561 clidp->data, clidp->len);
3563 silc_buffer_free(clidp);
3567 /* Timeout callback. This is called if connection is idle or for some
3568 other reason is not responding within some period of time. This
3569 disconnects the remote end. */
3571 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3573 SilcServer server = (SilcServer)context;
3574 SilcSocketConnection sock = server->sockets[fd];
3575 SilcProtocolType protocol = 0;
3577 SILC_LOG_DEBUG(("Start"));
3582 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3583 sock->hostname, sock->ip));
3585 /* If we have protocol active we must assure that we call the protocol's
3586 final callback so that all the memory is freed. */
3587 if (sock->protocol && sock->protocol->protocol &&
3588 sock->protocol->protocol->type != SILC_PROTOCOL_SERVER_BACKUP) {
3589 protocol = sock->protocol->protocol->type;
3590 silc_protocol_cancel(sock->protocol, server->schedule);
3591 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3592 silc_protocol_execute_final(sock->protocol, server->schedule);
3593 sock->protocol = NULL;
3597 silc_server_disconnect_remote(server, sock,
3599 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3600 SILC_STATUS_ERR_AUTH_FAILED :
3601 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3602 "Connection timeout");
3604 if (sock->user_data)
3605 silc_server_free_sock_user_data(server, sock, NULL);
3608 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3609 function may be used only by router. In real SILC network all channels
3610 are created by routers thus this function is never used by normal
3613 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3614 SilcServerID *router_id,
3620 SilcChannelID *channel_id;
3621 SilcChannelEntry entry;
3625 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3628 cipher = SILC_DEFAULT_CIPHER;
3630 hmac = SILC_DEFAULT_HMAC;
3632 /* Allocate cipher */
3633 if (!silc_cipher_alloc(cipher, &key))
3637 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3638 silc_cipher_free(key);
3642 channel_name = strdup(channel_name);
3644 /* Create the channel ID */
3645 if (!silc_id_create_channel_id(server, router_id, server->rng,
3647 silc_free(channel_name);
3648 silc_cipher_free(key);
3649 silc_hmac_free(newhmac);
3653 /* Create the channel */
3654 entry = silc_idlist_add_channel(server->local_list, channel_name,
3655 SILC_CHANNEL_MODE_NONE, channel_id,
3656 NULL, key, newhmac, 0);
3658 silc_free(channel_name);
3659 silc_cipher_free(key);
3660 silc_hmac_free(newhmac);
3661 silc_free(channel_id);
3665 entry->cipher = strdup(cipher);
3666 entry->hmac_name = strdup(hmac);
3668 /* Now create the actual key material */
3669 if (!silc_server_create_channel_key(server, entry,
3670 silc_cipher_get_key_len(key) / 8)) {
3671 silc_idlist_del_channel(server->local_list, entry);
3675 /* Notify other routers about the new channel. We send the packet
3676 to our primary route. */
3678 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3679 channel_name, entry->id,
3680 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3683 /* Distribute to backup routers */
3684 if (broadcast && server->server_type == SILC_ROUTER) {
3687 SilcUInt32 name_len = strlen(channel_name);
3688 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3689 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3691 packet = silc_channel_payload_encode(channel_name, name_len,
3692 cid, channel_id_len, entry->mode);
3693 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3694 packet->data, packet->len, FALSE, TRUE);
3696 silc_buffer_free(packet);
3699 server->stat.my_channels++;
3700 if (server->server_type == SILC_ROUTER) {
3701 server->stat.channels++;
3702 server->stat.cell_channels++;
3703 entry->users_resolved = TRUE;
3709 /* Same as above but creates the channel with Channel ID `channel_id. */
3712 silc_server_create_new_channel_with_id(SilcServer server,
3716 SilcChannelID *channel_id,
3719 SilcChannelEntry entry;
3723 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3726 cipher = SILC_DEFAULT_CIPHER;
3728 hmac = SILC_DEFAULT_HMAC;
3730 /* Allocate cipher */
3731 if (!silc_cipher_alloc(cipher, &key))
3735 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3736 silc_cipher_free(key);
3740 channel_name = strdup(channel_name);
3742 /* Create the channel */
3743 entry = silc_idlist_add_channel(server->local_list, channel_name,
3744 SILC_CHANNEL_MODE_NONE, channel_id,
3745 NULL, key, newhmac, 0);
3747 silc_cipher_free(key);
3748 silc_hmac_free(newhmac);
3749 silc_free(channel_name);
3753 /* Now create the actual key material */
3754 if (!silc_server_create_channel_key(server, entry,
3755 silc_cipher_get_key_len(key) / 8)) {
3756 silc_idlist_del_channel(server->local_list, entry);
3760 /* Notify other routers about the new channel. We send the packet
3761 to our primary route. */
3763 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3764 channel_name, entry->id,
3765 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3768 /* Distribute to backup routers */
3769 if (broadcast && server->server_type == SILC_ROUTER) {
3772 SilcUInt32 name_len = strlen(channel_name);
3773 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3774 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3776 packet = silc_channel_payload_encode(channel_name, name_len,
3777 cid, channel_id_len, entry->mode);
3778 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3779 packet->data, packet->len, FALSE, TRUE);
3781 silc_buffer_free(packet);
3784 server->stat.my_channels++;
3785 if (server->server_type == SILC_ROUTER) {
3786 server->stat.channels++;
3787 server->stat.cell_channels++;
3788 entry->users_resolved = TRUE;
3794 /* Channel's key re-key timeout callback. */
3796 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3798 SilcServer server = app_context;
3799 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3803 /* Return now if we are shutting down */
3804 if (server->server_shutdown)
3807 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3810 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3813 /* Generates new channel key. This is used to create the initial channel key
3814 but also to re-generate new key for channel. If `key_len' is provided
3815 it is the bytes of the key length. */
3817 bool silc_server_create_channel_key(SilcServer server,
3818 SilcChannelEntry channel,
3822 unsigned char channel_key[32], hash[32];
3825 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3826 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3830 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3832 if (!channel->channel_key)
3833 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3834 channel->channel_key = NULL;
3840 else if (channel->key_len)
3841 len = channel->key_len / 8;
3843 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3845 /* Create channel key */
3846 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3849 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3851 /* Remove old key if exists */
3853 memset(channel->key, 0, channel->key_len / 8);
3854 silc_free(channel->key);
3858 channel->key_len = len * 8;
3859 channel->key = silc_memdup(channel_key, len);
3860 memset(channel_key, 0, sizeof(channel_key));
3862 /* Generate HMAC key from the channel key data and set it */
3864 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3865 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3866 silc_hmac_set_key(channel->hmac, hash,
3867 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3868 memset(hash, 0, sizeof(hash));
3870 if (server->server_type == SILC_ROUTER) {
3871 if (!channel->rekey)
3872 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3873 channel->rekey->channel = channel;
3874 channel->rekey->key_len = key_len;
3875 if (channel->rekey->task)
3876 silc_schedule_task_del(server->schedule, channel->rekey->task);
3878 channel->rekey->task =
3879 silc_schedule_task_add(server->schedule, 0,
3880 silc_server_channel_key_rekey,
3881 (void *)channel->rekey,
3882 server->config->channel_rekey_secs, 0,
3884 SILC_TASK_PRI_NORMAL);
3890 /* Saves the channel key found in the encoded `key_payload' buffer. This
3891 function is used when we receive Channel Key Payload and also when we're
3892 processing JOIN command reply. Returns entry to the channel. */
3894 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3895 SilcBuffer key_payload,
3896 SilcChannelEntry channel)
3898 SilcChannelKeyPayload payload = NULL;
3899 SilcChannelID *id = NULL;
3900 unsigned char *tmp, hash[32];
3904 /* Decode channel key payload */
3905 payload = silc_channel_key_payload_parse(key_payload->data,
3908 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3913 /* Get the channel entry */
3916 /* Get channel ID */
3917 tmp = silc_channel_key_get_id(payload, &tmp_len);
3918 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3924 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3926 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3928 if (server->server_type == SILC_ROUTER)
3929 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3930 silc_id_render(id, SILC_ID_CHANNEL)));
3936 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3938 tmp = silc_channel_key_get_key(payload, &tmp_len);
3944 cipher = silc_channel_key_get_cipher(payload, NULL);
3950 /* Remove old key if exists */
3952 memset(channel->key, 0, channel->key_len / 8);
3953 silc_free(channel->key);
3954 silc_cipher_free(channel->channel_key);
3957 /* Create new cipher */
3958 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3959 channel->channel_key = NULL;
3964 if (channel->cipher)
3965 silc_free(channel->cipher);
3966 channel->cipher = strdup(cipher);
3969 channel->key_len = tmp_len * 8;
3970 channel->key = silc_memdup(tmp, tmp_len);
3971 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3973 /* Generate HMAC key from the channel key data and set it */
3975 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3976 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3977 silc_hmac_set_key(channel->hmac, hash,
3978 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3980 memset(hash, 0, sizeof(hash));
3981 memset(tmp, 0, tmp_len);
3983 if (server->server_type == SILC_ROUTER) {
3984 if (!channel->rekey)
3985 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3986 channel->rekey->channel = channel;
3987 if (channel->rekey->task)
3988 silc_schedule_task_del(server->schedule, channel->rekey->task);
3990 channel->rekey->task =
3991 silc_schedule_task_add(server->schedule, 0,
3992 silc_server_channel_key_rekey,
3993 (void *)channel->rekey,
3994 server->config->channel_rekey_secs, 0,
3996 SILC_TASK_PRI_NORMAL);
4002 silc_channel_key_payload_free(payload);
4007 /* Heartbeat callback. This function is set as argument for the
4008 silc_socket_set_heartbeat function. The library will call this function
4009 at the set time interval. */
4011 void silc_server_perform_heartbeat(SilcSocketConnection sock,
4014 SilcServer server = hb_context;
4016 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
4017 sock->port, sock->ip));
4019 /* Send the heartbeat */
4020 silc_server_send_heartbeat(server, sock);
4023 /* Returns assembled of all servers in the given ID list. The packet's
4024 form is dictated by the New ID payload. */
4026 static void silc_server_announce_get_servers(SilcServer server,
4027 SilcServerEntry remote,
4029 SilcBuffer *servers,
4030 unsigned long creation_time)
4032 SilcIDCacheList list;
4033 SilcIDCacheEntry id_cache;
4034 SilcServerEntry entry;
4037 /* Go through all clients in the list */
4038 if (silc_idcache_get_all(id_list->servers, &list)) {
4039 if (silc_idcache_list_first(list, &id_cache)) {
4041 entry = (SilcServerEntry)id_cache->context;
4043 /* Do not announce the one we've sending our announcements and
4044 do not announce ourself. Also check the creation time if it's
4046 if ((entry == remote) || (entry == server->id_entry) ||
4047 (creation_time && entry->data.created < creation_time)) {
4048 if (!silc_idcache_list_next(list, &id_cache))
4053 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4055 *servers = silc_buffer_realloc(*servers,
4057 (*servers)->truelen + idp->len :
4059 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4060 silc_buffer_put(*servers, idp->data, idp->len);
4061 silc_buffer_pull(*servers, idp->len);
4062 silc_buffer_free(idp);
4064 if (!silc_idcache_list_next(list, &id_cache))
4069 silc_idcache_list_free(list);
4074 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4080 p = silc_notify_payload_encode(notify, argc, ap);
4086 /* This function is used by router to announce existing servers to our
4087 primary router when we've connected to it. If `creation_time' is non-zero
4088 then only the servers that has been created after the `creation_time'
4089 will be announced. */
4091 void silc_server_announce_servers(SilcServer server, bool global,
4092 unsigned long creation_time,
4093 SilcSocketConnection remote)
4095 SilcBuffer servers = NULL;
4097 SILC_LOG_DEBUG(("Announcing servers"));
4099 /* Get servers in local list */
4100 silc_server_announce_get_servers(server, remote->user_data,
4101 server->local_list, &servers,
4105 /* Get servers in global list */
4106 silc_server_announce_get_servers(server, remote->user_data,
4107 server->global_list, &servers,
4111 silc_buffer_push(servers, servers->data - servers->head);
4112 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4114 /* Send the packet */
4115 silc_server_packet_send(server, remote,
4116 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4117 servers->data, servers->len, TRUE);
4119 silc_buffer_free(servers);
4123 /* Returns assembled packet of all clients in the given ID list. The
4124 packet's form is dictated by the New ID Payload. */
4126 static void silc_server_announce_get_clients(SilcServer server,
4128 SilcBuffer *clients,
4130 unsigned long creation_time)
4132 SilcIDCacheList list;
4133 SilcIDCacheEntry id_cache;
4134 SilcClientEntry client;
4137 unsigned char mode[4];
4139 /* Go through all clients in the list */
4140 if (silc_idcache_get_all(id_list->clients, &list)) {
4141 if (silc_idcache_list_first(list, &id_cache)) {
4143 client = (SilcClientEntry)id_cache->context;
4145 if (creation_time && client->data.created < creation_time) {
4146 if (!silc_idcache_list_next(list, &id_cache))
4150 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4151 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4152 if (!silc_idcache_list_next(list, &id_cache))
4157 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4159 *clients = silc_buffer_realloc(*clients,
4161 (*clients)->truelen + idp->len :
4163 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4164 silc_buffer_put(*clients, idp->data, idp->len);
4165 silc_buffer_pull(*clients, idp->len);
4167 SILC_PUT32_MSB(client->mode, mode);
4169 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4170 2, idp->data, idp->len,
4172 *umodes = silc_buffer_realloc(*umodes,
4174 (*umodes)->truelen + tmp->len :
4176 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4177 silc_buffer_put(*umodes, tmp->data, tmp->len);
4178 silc_buffer_pull(*umodes, tmp->len);
4179 silc_buffer_free(tmp);
4181 silc_buffer_free(idp);
4183 if (!silc_idcache_list_next(list, &id_cache))
4188 silc_idcache_list_free(list);
4192 /* This function is used to announce our existing clients to our router
4193 when we've connected to it. If `creation_time' is non-zero then only
4194 the clients that has been created after the `creation_time' will be
4197 void silc_server_announce_clients(SilcServer server,
4198 unsigned long creation_time,
4199 SilcSocketConnection remote)
4201 SilcBuffer clients = NULL;
4202 SilcBuffer umodes = NULL;
4204 SILC_LOG_DEBUG(("Announcing clients"));
4206 /* Get clients in local list */
4207 silc_server_announce_get_clients(server, server->local_list,
4208 &clients, &umodes, creation_time);
4210 /* As router we announce our global list as well */
4211 if (server->server_type == SILC_ROUTER)
4212 silc_server_announce_get_clients(server, server->global_list,
4213 &clients, &umodes, creation_time);
4216 silc_buffer_push(clients, clients->data - clients->head);
4217 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4219 /* Send the packet */
4220 silc_server_packet_send(server, remote,
4221 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4222 clients->data, clients->len, TRUE);
4224 silc_buffer_free(clients);
4228 silc_buffer_push(umodes, umodes->data - umodes->head);
4229 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4231 /* Send the packet */
4232 silc_server_packet_send(server, remote,
4233 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4234 umodes->data, umodes->len, TRUE);
4236 silc_buffer_free(umodes);
4240 /* Returns channel's topic for announcing it */
4242 void silc_server_announce_get_channel_topic(SilcServer server,
4243 SilcChannelEntry channel,
4248 if (channel->topic) {
4249 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4250 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4251 chidp->data, chidp->len,
4253 strlen(channel->topic));
4254 silc_buffer_free(chidp);
4258 /* Returns assembled packets for channel users of the `channel'. */
4260 void silc_server_announce_get_channel_users(SilcServer server,
4261 SilcChannelEntry channel,
4262 SilcBuffer *channel_modes,
4263 SilcBuffer *channel_users,
4264 SilcBuffer *channel_users_modes)
4266 SilcChannelClientEntry chl;
4267 SilcHashTableList htl;
4268 SilcBuffer chidp, clidp, csidp;
4269 SilcBuffer tmp, fkey = NULL;
4271 unsigned char mode[4];
4274 SILC_LOG_DEBUG(("Start"));
4276 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4277 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4280 SILC_PUT32_MSB(channel->mode, mode);
4281 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4282 if (channel->founder_key)
4283 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4285 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4286 6, csidp->data, csidp->len,
4289 hmac, hmac ? strlen(hmac) : 0,
4290 channel->passphrase,
4291 channel->passphrase ?
4292 strlen(channel->passphrase) : 0,
4293 fkey ? fkey->data : NULL,
4294 fkey ? fkey->len : 0);
4297 silc_buffer_realloc(*channel_modes,
4299 (*channel_modes)->truelen + len : len));
4300 silc_buffer_pull_tail(*channel_modes,
4301 ((*channel_modes)->end -
4302 (*channel_modes)->data));
4303 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4304 silc_buffer_pull(*channel_modes, len);
4305 silc_buffer_free(tmp);
4306 silc_buffer_free(fkey);
4309 /* Now find all users on the channel */
4310 silc_hash_table_list(channel->user_list, &htl);
4311 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4312 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4315 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4316 clidp->data, clidp->len,
4317 chidp->data, chidp->len);
4320 silc_buffer_realloc(*channel_users,
4322 (*channel_users)->truelen + len : len));
4323 silc_buffer_pull_tail(*channel_users,
4324 ((*channel_users)->end -
4325 (*channel_users)->data));
4327 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4328 silc_buffer_pull(*channel_users, len);
4329 silc_buffer_free(tmp);
4331 /* CUMODE notify for mode change on the channel */
4332 SILC_PUT32_MSB(chl->mode, mode);
4333 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4334 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4335 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4336 4, csidp->data, csidp->len,
4338 clidp->data, clidp->len,
4339 fkey ? fkey->data : NULL,
4340 fkey ? fkey->len : 0);
4342 *channel_users_modes =
4343 silc_buffer_realloc(*channel_users_modes,
4344 (*channel_users_modes ?
4345 (*channel_users_modes)->truelen + len : len));
4346 silc_buffer_pull_tail(*channel_users_modes,
4347 ((*channel_users_modes)->end -
4348 (*channel_users_modes)->data));
4350 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4351 silc_buffer_pull(*channel_users_modes, len);
4352 silc_buffer_free(tmp);
4353 silc_buffer_free(fkey);
4355 silc_buffer_free(clidp);
4357 silc_hash_table_list_reset(&htl);
4358 silc_buffer_free(chidp);
4359 silc_buffer_free(csidp);
4362 /* Returns assembled packets for all channels and users on those channels
4363 from the given ID List. The packets are in the form dictated by the
4364 New Channel and New Channel User payloads. */
4366 void silc_server_announce_get_channels(SilcServer server,
4368 SilcBuffer *channels,
4369 SilcBuffer **channel_modes,
4370 SilcBuffer *channel_users,
4371 SilcBuffer **channel_users_modes,
4372 SilcUInt32 *channel_users_modes_c,
4373 SilcBuffer **channel_topics,
4374 SilcChannelID ***channel_ids,
4375 unsigned long creation_time)
4377 SilcIDCacheList list;
4378 SilcIDCacheEntry id_cache;
4379 SilcChannelEntry channel;
4382 SilcUInt16 name_len;
4384 int i = *channel_users_modes_c;
4387 SILC_LOG_DEBUG(("Start"));
4389 /* Go through all channels in the list */
4390 if (silc_idcache_get_all(id_list->channels, &list)) {
4391 if (silc_idcache_list_first(list, &id_cache)) {
4393 channel = (SilcChannelEntry)id_cache->context;
4395 if (creation_time && channel->created < creation_time)
4400 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4401 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4402 name_len = strlen(channel->channel_name);
4405 len = 4 + name_len + id_len + 4;
4407 silc_buffer_realloc(*channels,
4408 (*channels ? (*channels)->truelen +
4410 silc_buffer_pull_tail(*channels,
4411 ((*channels)->end - (*channels)->data));
4412 silc_buffer_format(*channels,
4413 SILC_STR_UI_SHORT(name_len),
4414 SILC_STR_UI_XNSTRING(channel->channel_name,
4416 SILC_STR_UI_SHORT(id_len),
4417 SILC_STR_UI_XNSTRING(cid, id_len),
4418 SILC_STR_UI_INT(channel->mode),
4420 silc_buffer_pull(*channels, len);
4423 if (creation_time && channel->updated < creation_time)
4429 /* Channel user modes */
4430 *channel_users_modes = silc_realloc(*channel_users_modes,
4431 sizeof(**channel_users_modes) *
4433 (*channel_users_modes)[i] = NULL;
4434 *channel_modes = silc_realloc(*channel_modes,
4435 sizeof(**channel_modes) * (i + 1));
4436 (*channel_modes)[i] = NULL;
4437 *channel_ids = silc_realloc(*channel_ids,
4438 sizeof(**channel_ids) * (i + 1));
4439 (*channel_ids)[i] = NULL;
4440 silc_server_announce_get_channel_users(server, channel,
4441 &(*channel_modes)[i],
4443 &(*channel_users_modes)[i]);
4444 (*channel_ids)[i] = channel->id;
4446 /* Channel's topic */
4447 *channel_topics = silc_realloc(*channel_topics,
4448 sizeof(**channel_topics) * (i + 1));
4449 (*channel_topics)[i] = NULL;
4450 silc_server_announce_get_channel_topic(server, channel,
4451 &(*channel_topics)[i]);
4452 (*channel_users_modes_c)++;
4459 if (!silc_idcache_list_next(list, &id_cache))
4464 silc_idcache_list_free(list);
4468 /* This function is used to announce our existing channels to our router
4469 when we've connected to it. This also announces the users on the
4470 channels to the router. If the `creation_time' is non-zero only the
4471 channels that was created after the `creation_time' are announced.
4472 Note that the channel users are still announced even if the `creation_time'
4475 void silc_server_announce_channels(SilcServer server,
4476 unsigned long creation_time,
4477 SilcSocketConnection remote)
4479 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4480 SilcBuffer *channel_users_modes = NULL;
4481 SilcBuffer *channel_topics = NULL;
4482 SilcUInt32 channel_users_modes_c = 0;
4483 SilcChannelID **channel_ids = NULL;
4485 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4487 /* Get channels and channel users in local list */
4488 silc_server_announce_get_channels(server, server->local_list,
4489 &channels, &channel_modes,
4491 &channel_users_modes,
4492 &channel_users_modes_c,
4494 &channel_ids, creation_time);
4496 /* Get channels and channel users in global list */
4497 if (server->server_type != SILC_SERVER)
4498 silc_server_announce_get_channels(server, server->global_list,
4499 &channels, &channel_modes,
4501 &channel_users_modes,
4502 &channel_users_modes_c,
4504 &channel_ids, creation_time);
4507 silc_buffer_push(channels, channels->data - channels->head);
4508 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4510 /* Send the packet */
4511 silc_server_packet_send(server, remote,
4512 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4513 channels->data, channels->len,
4516 silc_buffer_free(channels);
4519 if (channel_users) {
4520 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4521 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4522 channel_users->len);
4524 /* Send the packet */
4525 silc_server_packet_send(server, remote,
4526 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4527 channel_users->data, channel_users->len,
4530 silc_buffer_free(channel_users);
4533 if (channel_modes) {
4536 for (i = 0; i < channel_users_modes_c; i++) {
4537 if (!channel_modes[i])
4539 silc_buffer_push(channel_modes[i],
4540 channel_modes[i]->data -
4541 channel_modes[i]->head);
4542 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4543 channel_modes[i]->len);
4544 silc_server_packet_send_dest(server, remote,
4545 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4546 channel_ids[i], SILC_ID_CHANNEL,
4547 channel_modes[i]->data,
4548 channel_modes[i]->len,
4550 silc_buffer_free(channel_modes[i]);
4552 silc_free(channel_modes);
4555 if (channel_users_modes) {
4558 for (i = 0; i < channel_users_modes_c; i++) {
4559 if (!channel_users_modes[i])
4561 silc_buffer_push(channel_users_modes[i],
4562 channel_users_modes[i]->data -
4563 channel_users_modes[i]->head);
4564 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4565 channel_users_modes[i]->len);
4566 silc_server_packet_send_dest(server, remote,
4567 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4568 channel_ids[i], SILC_ID_CHANNEL,
4569 channel_users_modes[i]->data,
4570 channel_users_modes[i]->len,
4572 silc_buffer_free(channel_users_modes[i]);
4574 silc_free(channel_users_modes);
4577 if (channel_topics) {
4580 for (i = 0; i < channel_users_modes_c; i++) {
4581 if (!channel_topics[i])
4584 silc_buffer_push(channel_topics[i],
4585 channel_topics[i]->data -
4586 channel_topics[i]->head);
4587 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4588 channel_topics[i]->len);
4589 silc_server_packet_send_dest(server, remote,
4590 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4591 channel_ids[i], SILC_ID_CHANNEL,
4592 channel_topics[i]->data,
4593 channel_topics[i]->len,
4595 silc_buffer_free(channel_topics[i]);
4597 silc_free(channel_topics);
4600 silc_free(channel_ids);
4603 /* Assembles user list and users mode list from the `channel'. */
4605 bool silc_server_get_users_on_channel(SilcServer server,
4606 SilcChannelEntry channel,
4607 SilcBuffer *user_list,
4608 SilcBuffer *mode_list,
4609 SilcUInt32 *user_count)
4611 SilcChannelClientEntry chl;
4612 SilcHashTableList htl;
4613 SilcBuffer client_id_list;
4614 SilcBuffer client_mode_list;
4616 SilcUInt32 list_count = 0, len = 0;
4618 if (!silc_hash_table_count(channel->user_list))
4621 silc_hash_table_list(channel->user_list, &htl);
4622 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4623 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4624 silc_hash_table_list_reset(&htl);
4626 client_id_list = silc_buffer_alloc(len);
4628 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4629 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4630 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4632 silc_hash_table_list(channel->user_list, &htl);
4633 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4635 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4636 silc_buffer_put(client_id_list, idp->data, idp->len);
4637 silc_buffer_pull(client_id_list, idp->len);
4638 silc_buffer_free(idp);
4640 /* Client's mode on channel */
4641 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4642 silc_buffer_pull(client_mode_list, 4);
4646 silc_hash_table_list_reset(&htl);
4647 silc_buffer_push(client_id_list,
4648 client_id_list->data - client_id_list->head);
4649 silc_buffer_push(client_mode_list,
4650 client_mode_list->data - client_mode_list->head);
4652 *user_list = client_id_list;
4653 *mode_list = client_mode_list;
4654 *user_count = list_count;
4658 /* Saves users and their modes to the `channel'. */
4660 void silc_server_save_users_on_channel(SilcServer server,
4661 SilcSocketConnection sock,
4662 SilcChannelEntry channel,
4663 SilcClientID *noadd,
4664 SilcBuffer user_list,
4665 SilcBuffer mode_list,
4666 SilcUInt32 user_count)
4671 SilcClientID *client_id;
4672 SilcClientEntry client;
4673 SilcIDCacheEntry cache;
4674 SilcChannelClientEntry chl;
4676 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4677 channel->channel_name));
4679 for (i = 0; i < user_count; i++) {
4681 SILC_GET16_MSB(idp_len, user_list->data + 2);
4683 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4684 silc_buffer_pull(user_list, idp_len);
4689 SILC_GET32_MSB(mode, mode_list->data);
4690 silc_buffer_pull(mode_list, 4);
4692 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4693 silc_free(client_id);
4699 /* Check if we have this client cached already. */
4700 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4701 server->server_type, &cache);
4703 client = silc_idlist_find_client_by_id(server->global_list,
4704 client_id, server->server_type,
4707 /* If router did not find such Client ID in its lists then this must
4708 be bogus client or some router in the net is buggy. */
4709 if (server->server_type != SILC_SERVER) {
4710 silc_free(client_id);
4714 /* We don't have that client anywhere, add it. The client is added
4715 to global list since server didn't have it in the lists so it must be
4717 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4718 silc_id_dup(client_id, SILC_ID_CLIENT),
4719 sock->user_data, NULL, 0);
4721 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4722 silc_free(client_id);
4726 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4731 silc_free(client_id);
4733 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4734 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4735 "%s", channel->channel_name));
4739 if (!silc_server_client_on_channel(client, channel, &chl)) {
4740 /* Client was not on the channel, add it. */
4741 chl = silc_calloc(1, sizeof(*chl));
4742 chl->client = client;
4744 chl->channel = channel;
4745 silc_hash_table_add(channel->user_list, chl->client, chl);
4746 silc_hash_table_add(client->channels, chl->channel, chl);
4747 channel->user_count++;
4755 /* Saves channels and channels user modes to the `client'. Removes
4756 the client from those channels that are not sent in the list but
4759 void silc_server_save_user_channels(SilcServer server,
4760 SilcSocketConnection sock,
4761 SilcClientEntry client,
4762 SilcBuffer channels,
4763 SilcBuffer channels_user_modes)
4766 SilcUInt32 *chumodes;
4767 SilcChannelPayload entry;
4768 SilcChannelEntry channel;
4769 SilcChannelID *channel_id;
4770 SilcChannelClientEntry chl;
4771 SilcHashTable ht = NULL;
4772 SilcHashTableList htl;
4776 if (!channels || !channels_user_modes ||
4777 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4780 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4781 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4783 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4784 NULL, NULL, NULL, TRUE);
4785 silc_dlist_start(ch);
4786 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4787 /* Check if we have this channel, and add it if we don't have it.
4788 Also add the client on the channel unless it is there already. */
4789 channel_id = silc_channel_get_id_parse(entry);
4790 channel = silc_idlist_find_channel_by_id(server->local_list,
4793 channel = silc_idlist_find_channel_by_id(server->global_list,
4796 if (server->server_type != SILC_SERVER) {
4797 silc_free(channel_id);
4802 /* We don't have that channel anywhere, add it. */
4803 name = silc_channel_get_name(entry, NULL);
4804 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4805 channel_id, server->router,
4808 silc_free(channel_id);
4815 channel->mode = silc_channel_get_mode(entry);
4817 /* Add the client on the channel */
4818 if (!silc_server_client_on_channel(client, channel, &chl)) {
4819 chl = silc_calloc(1, sizeof(*chl));
4820 chl->client = client;
4821 chl->mode = chumodes[i++];
4822 chl->channel = channel;
4823 silc_hash_table_add(channel->user_list, chl->client, chl);
4824 silc_hash_table_add(client->channels, chl->channel, chl);
4825 channel->user_count++;
4828 chl->mode = chumodes[i++];
4831 silc_hash_table_add(ht, channel, channel);
4832 silc_free(channel_id);
4834 silc_channel_payload_list_free(ch);
4835 silc_free(chumodes);
4839 /* Go through the list again and remove client from channels that
4840 are no part of the list. */
4842 silc_hash_table_list(client->channels, &htl);
4843 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4844 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4845 silc_hash_table_del(chl->channel->user_list, chl->client);
4846 silc_hash_table_del(chl->client->channels, chl->channel);
4850 silc_hash_table_list_reset(&htl);
4851 silc_hash_table_free(ht);
4853 silc_hash_table_list(client->channels, &htl);
4854 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4855 silc_hash_table_del(chl->channel->user_list, chl->client);
4856 silc_hash_table_del(chl->client->channels, chl->channel);
4859 silc_hash_table_list_reset(&htl);
4863 /* Lookups route to the client indicated by the `id_data'. The connection
4864 object and internal data object is returned. Returns NULL if route
4865 could not be found to the client. If the `client_id' is specified then
4866 it is used and the `id_data' is ignored. */
4868 SilcSocketConnection
4869 silc_server_get_client_route(SilcServer server,
4870 unsigned char *id_data,
4872 SilcClientID *client_id,
4873 SilcIDListData *idata,
4874 SilcClientEntry *client_entry)
4877 SilcClientEntry client;
4879 SILC_LOG_DEBUG(("Start"));
4882 *client_entry = NULL;
4884 /* Decode destination Client ID */
4886 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4888 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4892 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4895 /* If the destination belongs to our server we don't have to route
4896 the packet anywhere but to send it to the local destination. */
4897 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4901 /* If we are router and the client has router then the client is in
4902 our cell but not directly connected to us. */
4903 if (server->server_type == SILC_ROUTER && client->router) {
4904 /* We are of course in this case the client's router thus the route
4905 to the client is the server who owns the client. So, we will send
4906 the packet to that server. */
4908 *idata = (SilcIDListData)client->router;
4909 return client->router->connection;
4912 /* Seems that client really is directly connected to us */
4914 *idata = (SilcIDListData)client;
4916 *client_entry = client;
4917 return client->connection;
4920 /* Destination belongs to someone not in this server. If we are normal
4921 server our action is to send the packet to our router. */
4922 if (server->server_type != SILC_ROUTER && !server->standalone) {
4925 *idata = (SilcIDListData)server->router;
4926 return SILC_PRIMARY_ROUTE(server);
4929 /* We are router and we will perform route lookup for the destination
4930 and send the packet to fastest route. */
4931 if (server->server_type == SILC_ROUTER && !server->standalone) {
4932 /* Check first that the ID is valid */
4933 client = silc_idlist_find_client_by_id(server->global_list, id,
4936 SilcSocketConnection dst_sock;
4938 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4942 *idata = (SilcIDListData)dst_sock->user_data;
4951 /* Encodes and returns channel list of channels the `client' has joined.
4952 Secret channels are not put to the list. */
4954 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4955 SilcClientEntry client,
4958 SilcBuffer *user_mode_list)
4960 SilcBuffer buffer = NULL;
4961 SilcChannelEntry channel;
4962 SilcChannelClientEntry chl;
4963 SilcHashTableList htl;
4966 SilcUInt16 name_len;
4970 *user_mode_list = NULL;
4972 silc_hash_table_list(client->channels, &htl);
4973 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4974 channel = chl->channel;
4976 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4978 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4981 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4982 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4983 name_len = strlen(channel->channel_name);
4985 len = 4 + name_len + id_len + 4;
4986 buffer = silc_buffer_realloc(buffer,
4987 (buffer ? buffer->truelen + len : len));
4988 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4989 silc_buffer_format(buffer,
4990 SILC_STR_UI_SHORT(name_len),
4991 SILC_STR_UI_XNSTRING(channel->channel_name,
4993 SILC_STR_UI_SHORT(id_len),
4994 SILC_STR_UI_XNSTRING(cid, id_len),
4995 SILC_STR_UI_INT(chl->channel->mode),
4997 silc_buffer_pull(buffer, len);
5000 if (user_mode_list) {
5001 *user_mode_list = silc_buffer_realloc(*user_mode_list,
5003 (*user_mode_list)->truelen + 4 :
5005 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5006 (*user_mode_list)->data));
5007 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5008 silc_buffer_pull(*user_mode_list, 4);
5011 silc_hash_table_list_reset(&htl);
5014 silc_buffer_push(buffer, buffer->data - buffer->head);
5015 if (user_mode_list && *user_mode_list)
5016 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5017 (*user_mode_list)->head));
5022 /* A timeout callback for the re-key. We will be the initiator of the
5025 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5027 SilcServer server = app_context;
5028 SilcSocketConnection sock = (SilcSocketConnection)context;
5029 SilcIDListData idata = (SilcIDListData)sock->user_data;
5030 SilcProtocol protocol;
5031 SilcServerRekeyInternalContext *proto_ctx;
5033 /* Allocate internal protocol context. This is sent as context
5035 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5036 proto_ctx->server = (void *)server;
5037 proto_ctx->sock = sock;
5038 proto_ctx->responder = FALSE;
5039 proto_ctx->pfs = idata->rekey->pfs;
5041 /* Perform rekey protocol. Will call the final callback after the
5042 protocol is over. */
5043 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5044 &protocol, proto_ctx, silc_server_rekey_final);
5045 sock->protocol = protocol;
5047 /* Run the protocol */
5048 silc_protocol_execute(protocol, server->schedule, 0, 0);
5050 SILC_LOG_DEBUG(("Rekey protocol completed"));
5052 /* Re-register re-key timeout */
5053 silc_schedule_task_add(server->schedule, sock->sock,
5054 silc_server_rekey_callback,
5055 context, idata->rekey->timeout, 0,
5056 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5059 /* The final callback for the REKEY protocol. This will actually take the
5060 new key material into use. */
5062 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5064 SilcProtocol protocol = (SilcProtocol)context;
5065 SilcServerRekeyInternalContext *ctx =
5066 (SilcServerRekeyInternalContext *)protocol->context;
5067 SilcServer server = (SilcServer)ctx->server;
5068 SilcSocketConnection sock = ctx->sock;
5070 SILC_LOG_DEBUG(("Start"));
5072 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5073 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5074 /* Error occured during protocol */
5075 SILC_LOG_ERROR(("Error occurred during rekey protocol with "
5076 "%s (%s)", sock->hostname, sock->ip));
5077 silc_protocol_cancel(protocol, server->schedule);
5078 silc_protocol_free(protocol);
5079 sock->protocol = NULL;
5081 silc_packet_context_free(ctx->packet);
5083 silc_ske_free(ctx->ske);
5087 SILC_SET_DISCONNECTING(sock);
5088 server->backup_noswitch = TRUE;
5089 if (sock->user_data)
5090 silc_server_free_sock_user_data(server, sock, NULL);
5091 silc_server_close_connection(server, sock);
5092 silc_schedule_task_add(server->schedule, 0,
5093 silc_server_connect_to_router,
5096 SILC_TASK_PRI_NORMAL);
5101 /* Purge the outgoing data queue to assure that all rekey packets really
5102 go to the network before we quit the protocol. */
5103 silc_server_packet_queue_purge(server, sock);
5106 silc_protocol_free(protocol);
5107 sock->protocol = NULL;
5109 silc_packet_context_free(ctx->packet);
5111 silc_ske_free(ctx->ske);
5115 /* Task callback used to retrieve network statistical information from
5116 router server once in a while. */
5118 SILC_TASK_CALLBACK(silc_server_get_stats)
5120 SilcServer server = (SilcServer)context;
5121 SilcBuffer idp, packet;
5123 SILC_LOG_DEBUG(("Retrieving stats from router"));
5125 if (!server->standalone) {
5126 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5127 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5128 ++server->cmd_ident, 1,
5129 1, idp->data, idp->len);
5130 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5131 SILC_PACKET_COMMAND, 0, packet->data,
5132 packet->len, FALSE);
5133 silc_buffer_free(packet);
5134 silc_buffer_free(idp);
5137 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5138 server, 120, 0, SILC_TASK_TIMEOUT,