5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 * This is the actual SILC server than handles everything relating to
21 * servicing the SILC connections. This is also a SILC router as a router
22 * is also normal server.
26 #include "serverincludes.h"
27 #include "server_internal.h"
29 /* Static prototypes */
30 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
81 SilcIDCacheEntry cache;
90 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
91 silc_dlist_del(server->sim, sim);
94 silc_dlist_uninit(server->sim);
98 silc_server_backup_free(server);
99 silc_server_config_unref(&server->config_ref);
101 silc_rng_free(server->rng);
103 silc_pkcs_free(server->pkcs);
104 if (server->public_key)
105 silc_pkcs_public_key_free(server->public_key);
106 if (server->private_key)
107 silc_pkcs_private_key_free(server->private_key);
108 if (server->pending_commands)
109 silc_dlist_uninit(server->pending_commands);
110 if (server->id_entry)
111 silc_idlist_del_server(server->local_list, server->id_entry);
113 /* Delete all channels */
115 if (silc_idcache_get_all(server->local_list->channels, &list) &&
116 silc_idcache_list_first(list, &cache)) {
117 silc_idlist_del_channel(server->local_list, cache->context);
118 while (silc_idcache_list_next(list, &cache))
119 silc_idlist_del_channel(server->local_list, cache->context);
122 silc_idcache_list_free(list);
124 if (silc_idcache_get_all(server->global_list->channels, &list) &&
125 silc_idcache_list_first(list, &cache)) {
126 silc_idlist_del_channel(server->global_list, cache->context);
127 while (silc_idcache_list_next(list, &cache))
128 silc_idlist_del_channel(server->global_list, cache->context);
131 silc_idcache_list_free(list);
133 /* Delete all clients */
135 if (silc_idcache_get_all(server->local_list->clients, &list) &&
136 silc_idcache_list_first(list, &cache)) {
137 silc_idlist_del_client(server->local_list, cache->context);
138 while (silc_idcache_list_next(list, &cache))
139 silc_idlist_del_client(server->local_list, cache->context);
142 silc_idcache_list_free(list);
144 if (silc_idcache_get_all(server->global_list->clients, &list) &&
145 silc_idcache_list_first(list, &cache)) {
146 silc_idlist_del_client(server->global_list, cache->context);
147 while (silc_idcache_list_next(list, &cache))
148 silc_idlist_del_client(server->global_list, cache->context);
151 silc_idcache_list_free(list);
153 /* Delete all servers */
155 if (silc_idcache_get_all(server->local_list->servers, &list) &&
156 silc_idcache_list_first(list, &cache)) {
157 silc_idlist_del_server(server->local_list, cache->context);
158 while (silc_idcache_list_next(list, &cache))
159 silc_idlist_del_server(server->local_list, cache->context);
162 silc_idcache_list_free(list);
164 if (silc_idcache_get_all(server->global_list->servers, &list) &&
165 silc_idcache_list_first(list, &cache)) {
166 silc_idlist_del_server(server->global_list, cache->context);
167 while (silc_idcache_list_next(list, &cache))
168 silc_idlist_del_server(server->global_list, cache->context);
171 silc_idcache_list_free(list);
173 silc_idcache_free(server->local_list->clients);
174 silc_idcache_free(server->local_list->servers);
175 silc_idcache_free(server->local_list->channels);
176 silc_idcache_free(server->global_list->clients);
177 silc_idcache_free(server->global_list->servers);
178 silc_idcache_free(server->global_list->channels);
179 silc_hash_table_free(server->watcher_list);
181 silc_hash_free(server->md5hash);
182 silc_hash_free(server->sha1hash);
183 silc_hmac_unregister_all();
184 silc_hash_unregister_all();
185 silc_cipher_unregister_all();
186 silc_pkcs_unregister_all();
188 silc_free(server->local_list);
189 silc_free(server->global_list);
190 silc_free(server->server_name);
191 silc_free(server->id_string);
192 silc_free(server->purge_i);
193 silc_free(server->purge_g);
197 /* Creates a new server listener. */
199 static bool silc_server_listen(SilcServer server, const char *server_ip,
200 SilcUInt16 port, int *sock)
202 *sock = silc_net_create_server(port, server_ip);
204 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
211 /* Adds a secondary listener. */
213 bool silc_server_init_secondary(SilcServer server)
215 int sock = 0, sock_list[server->config->param.connections_max];
216 SilcSocketConnection newsocket = NULL;
217 SilcServerConfigServerInfoInterface *interface;
219 for (interface = server->config->server_info->secondary; interface;
220 interface = interface->next, sock++) {
222 if (!silc_server_listen(server,
223 interface->server_ip, interface->port, &sock_list[sock]))
226 /* Set socket to non-blocking mode */
227 silc_net_set_socket_nonblock(sock_list[sock]);
229 /* Add ourselves also to the socket table. The entry allocated above
230 is sent as argument for fast referencing in the future. */
231 silc_socket_alloc(sock_list[sock],
232 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
233 server->sockets[sock_list[sock]] = newsocket;
234 SILC_SET_LISTENER(newsocket);
236 /* Perform name and address lookups to resolve the listenning address
238 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
240 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
242 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
243 newsocket->hostname ? newsocket->hostname :
244 newsocket->ip ? newsocket->ip : ""));
245 server->stat.conn_failures++;
248 if (!newsocket->hostname)
249 newsocket->hostname = strdup(newsocket->ip);
251 newsocket->port = silc_net_get_local_port(sock);
253 newsocket->user_data = (void *)server->id_entry;
254 silc_schedule_task_add(server->schedule, sock_list[sock],
255 silc_server_accept_new_connection,
256 (void *)server, 0, 0,
258 SILC_TASK_PRI_NORMAL);
264 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
268 /* Initializes the entire SILC server. This is called always before running
269 the server. This is called only once at the initialization of the program.
270 This binds the server to its listenning port. After this function returns
271 one should call silc_server_run to start the server. This returns TRUE
272 when everything is ok to run the server. Configuration file must be
273 read and parsed before calling this. */
275 bool silc_server_init(SilcServer server)
279 SilcServerEntry id_entry;
280 SilcIDListPurge purge;
281 SilcSocketConnection newsocket = NULL;
283 SILC_LOG_DEBUG(("Initializing server"));
285 server->starttime = time(NULL);
287 /* Take config object for us */
288 silc_server_config_ref(&server->config_ref, server->config,
291 /* Steal public and private key from the config object */
292 server->public_key = server->config->server_info->public_key;
293 server->private_key = server->config->server_info->private_key;
294 server->config->server_info->public_key = NULL;
295 server->config->server_info->private_key = NULL;
297 /* Register all configured ciphers, PKCS and hash functions. */
298 if (!silc_server_config_register_ciphers(server))
299 silc_cipher_register_default();
300 if (!silc_server_config_register_pkcs(server))
301 silc_pkcs_register_default();
302 if (!silc_server_config_register_hashfuncs(server))
303 silc_hash_register_default();
304 if (!silc_server_config_register_hmacs(server))
305 silc_hmac_register_default();
307 /* Initialize random number generator for the server. */
308 server->rng = silc_rng_alloc();
309 silc_rng_init(server->rng);
310 silc_rng_global_init(server->rng);
312 /* Initialize hash functions for server to use */
313 silc_hash_alloc("md5", &server->md5hash);
314 silc_hash_alloc("sha1", &server->sha1hash);
316 /* Allocate PKCS context for local public and private keys */
317 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
319 silc_pkcs_public_key_set(server->pkcs, server->public_key);
320 silc_pkcs_private_key_set(server->pkcs, server->private_key);
322 /* Initialize the scheduler */
323 server->schedule = silc_schedule_init(server->config->param.connections_max,
325 if (!server->schedule)
328 /* First, register log files configuration for error output */
329 silc_server_config_setlogfiles(server);
331 /* Initialize ID caches */
332 server->local_list->clients =
333 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
334 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
335 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
337 /* These are allocated for normal server as well as these hold some
338 global information that the server has fetched from its router. For
339 router these are used as they are supposed to be used on router. */
340 server->global_list->clients =
341 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
342 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
343 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
345 /* Init watcher list */
346 server->watcher_list =
347 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
348 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
350 if (!server->watcher_list)
353 /* Create a listening server */
354 if (!silc_server_listen(server,
355 server->config->server_info->primary == NULL ? NULL :
356 server->config->server_info->primary->server_ip,
357 server->config->server_info->primary == NULL ? 0 :
358 server->config->server_info->primary->port,
362 /* Set socket to non-blocking mode */
363 silc_net_set_socket_nonblock(sock);
366 /* Allocate the entire socket list that is used in server. Eventually
367 all connections will have entry in this table (it is a table of
368 pointers to the actual object that is allocated individually
370 server->sockets = silc_calloc(server->config->param.connections_max,
371 sizeof(*server->sockets));
372 if (!server->sockets)
375 /* Add ourselves also to the socket table. The entry allocated above
376 is sent as argument for fast referencing in the future. */
377 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
378 server->sockets[sock] = newsocket;
379 SILC_SET_LISTENER(newsocket);
381 /* Perform name and address lookups to resolve the listenning address
383 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
385 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
387 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
388 newsocket->hostname ? newsocket->hostname :
389 newsocket->ip ? newsocket->ip : ""));
390 server->stat.conn_failures++;
393 if (!newsocket->hostname)
394 newsocket->hostname = strdup(newsocket->ip);
396 newsocket->port = silc_net_get_local_port(sock);
398 /* Create a Server ID for the server. */
399 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
404 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
405 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
406 server->server_name = server->config->server_info->server_name;
407 server->config->server_info->server_name = NULL;
409 /* Add ourselves to the server list. We don't have a router yet
410 beacuse we haven't established a route yet. It will be done later.
411 For now, NULL is sent as router. This allocates new entry to
414 silc_idlist_add_server(server->local_list, strdup(server->server_name),
415 server->server_type, server->id, NULL, NULL);
417 SILC_LOG_ERROR(("Could not add ourselves to cache"));
420 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
422 /* Put the allocated socket pointer also to the entry allocated above
423 for fast back-referencing to the socket list. */
424 newsocket->user_data = (void *)id_entry;
425 id_entry->connection = (void *)newsocket;
426 server->id_entry = id_entry;
428 /* Register protocols */
429 silc_server_protocols_register();
431 /* Add the first task to the scheduler. This is task that is executed by
432 timeout. It expires as soon as the caller calls silc_server_run. This
433 task performs authentication protocol and key exchange with our
435 silc_schedule_task_add(server->schedule, 0,
436 silc_server_connect_to_router,
437 (void *)server, 0, 1,
439 SILC_TASK_PRI_NORMAL);
441 /* Add listener task to the scheduler. This task receives new connections
442 to the server. This task remains on the queue until the end of the
444 silc_schedule_task_add(server->schedule, sock,
445 silc_server_accept_new_connection,
446 (void *)server, 0, 0,
448 SILC_TASK_PRI_NORMAL);
450 if (silc_server_init_secondary(server) == FALSE)
453 server->listenning = TRUE;
455 /* If server connections has been configured then we must be router as
456 normal server cannot have server connections, only router connections. */
457 if (server->config->servers) {
458 SilcServerConfigServer *ptr = server->config->servers;
460 server->server_type = SILC_ROUTER;
462 if (ptr->backup_router) {
463 server->server_type = SILC_BACKUP_ROUTER;
464 server->backup_router = TRUE;
465 server->id_entry->server_type = SILC_BACKUP_ROUTER;
472 /* Register the ID Cache purge task. This periodically purges the ID cache
473 and removes the expired cache entries. */
475 /* Clients local list */
476 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
477 purge->cache = server->local_list->clients;
478 purge->timeout = 600;
479 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
480 (void *)purge, purge->timeout, 0,
481 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
483 /* Clients global list */
484 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
485 purge->cache = server->global_list->clients;
486 purge->timeout = 300;
487 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
488 (void *)purge, purge->timeout, 0,
489 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
491 /* If we are normal server we'll retrieve network statisticial information
492 once in a while from the router. */
493 if (server->server_type == SILC_SERVER)
494 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
495 server, 10, 0, SILC_TASK_TIMEOUT,
498 if (server->server_type == SILC_ROUTER)
499 server->stat.routers++;
501 SILC_LOG_DEBUG(("Server initialized"));
503 /* We are done here, return succesfully */
507 silc_server_config_unref(&server->config_ref);
508 silc_net_close_server(sock);
512 /* Task callback to close a socket connection after rehash */
514 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
516 SilcServer server = context;
517 SilcSocketConnection sock = server->sockets[fd];
522 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
523 sock->hostname, sock->port,
524 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
525 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
526 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
528 silc_schedule_task_del_by_context(server->schedule, sock);
529 silc_server_disconnect_remote(server, sock,
530 SILC_STATUS_ERR_BANNED_FROM_SERVER,
531 "This connection is removed from "
534 silc_server_free_sock_user_data(server, sock, NULL);
537 /* This function basically reads the config file again and switches the config
538 object pointed by the server object. After that, we have to fix various
539 things such as the server_name and the listening ports.
540 Keep in mind that we no longer have the root privileges at this point. */
542 bool silc_server_rehash(SilcServer server)
544 SilcServerConfig newconfig;
546 SILC_LOG_INFO(("Rehashing server"));
548 /* Reset the logging system */
549 silc_log_quick = TRUE;
550 silc_log_flush_all();
552 /* Start the main rehash phase (read again the config file) */
553 newconfig = silc_server_config_alloc(server->config_file);
555 SILC_LOG_ERROR(("Rehash FAILED."));
559 /* Reinit scheduler if necessary */
560 if (newconfig->param.connections_max > server->config->param.connections_max)
561 if (!silc_schedule_reinit(server->schedule,
562 newconfig->param.connections_max))
565 /* Fix the server_name field */
566 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
567 silc_free(server->server_name);
568 server->server_name = newconfig->server_info->server_name;
569 newconfig->server_info->server_name = NULL;
571 /* Update the idcache list with a fresh pointer */
572 silc_free(server->id_entry->server_name);
573 server->id_entry->server_name = strdup(server->server_name);
574 if (!silc_idcache_del_by_context(server->local_list->servers,
577 if (!silc_idcache_add(server->local_list->servers,
578 server->id_entry->server_name,
579 server->id_entry->id, server->id_entry, 0, NULL))
584 silc_server_config_setlogfiles(server);
586 /* Change new key pair if necessary */
587 if (newconfig->server_info->public_key &&
588 !silc_pkcs_public_key_compare(server->public_key,
589 newconfig->server_info->public_key)) {
590 silc_pkcs_public_key_free(server->public_key);
591 silc_pkcs_private_key_free(server->private_key);
592 server->public_key = newconfig->server_info->public_key;
593 server->private_key = newconfig->server_info->private_key;
594 newconfig->server_info->public_key = NULL;
595 newconfig->server_info->private_key = NULL;
597 /* Allocate PKCS context for local public and private keys */
598 silc_pkcs_free(server->pkcs);
599 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
601 silc_pkcs_public_key_set(server->pkcs, server->public_key);
602 silc_pkcs_private_key_set(server->pkcs, server->private_key);
605 /* Check for unconfigured server and router connections and close
606 connections that were unconfigured. */
608 if (server->config->routers) {
609 SilcServerConfigRouter *ptr;
610 SilcServerConfigRouter *newptr;
613 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
616 /* Check whether new config has this one too */
617 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
618 if (silc_string_compare(newptr->host, ptr->host) &&
619 newptr->port == ptr->port &&
620 newptr->initiator == ptr->initiator) {
626 if (!found && ptr->host) {
627 /* Remove this connection */
628 SilcSocketConnection sock;
629 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
630 ptr->host, ptr->port);
631 if (sock && !SILC_IS_LISTENER(sock))
632 silc_schedule_task_add(server->schedule, sock->sock,
633 silc_server_rehash_close_connection,
634 server, 0, 1, SILC_TASK_TIMEOUT,
635 SILC_TASK_PRI_NORMAL);
640 if (server->config->servers) {
641 SilcServerConfigServer *ptr;
642 SilcServerConfigServer *newptr;
645 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
648 /* Check whether new config has this one too */
649 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
650 if (silc_string_compare(newptr->host, ptr->host)) {
656 if (!found && ptr->host) {
657 /* Remove this connection */
658 SilcSocketConnection sock;
659 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
661 if (sock && !SILC_IS_LISTENER(sock))
662 silc_schedule_task_add(server->schedule, sock->sock,
663 silc_server_rehash_close_connection,
664 server, 0, 1, SILC_TASK_TIMEOUT,
665 SILC_TASK_PRI_NORMAL);
670 if (server->config->clients) {
671 SilcServerConfigClient *ptr;
672 SilcServerConfigClient *newptr;
675 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
678 /* Check whether new config has this one too */
679 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
680 if (silc_string_compare(newptr->host, ptr->host)) {
686 if (!found && ptr->host) {
687 /* Remove this connection */
688 SilcSocketConnection sock;
689 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
692 silc_schedule_task_add(server->schedule, sock->sock,
693 silc_server_rehash_close_connection,
694 server, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
700 /* Go through all configured routers after rehash */
701 silc_schedule_task_add(server->schedule, 0,
702 silc_server_connect_to_router,
703 (void *)server, 0, 1,
705 SILC_TASK_PRI_NORMAL);
707 /* Check whether our router status has changed */
708 if (newconfig->servers) {
709 SilcServerConfigServer *ptr = newconfig->servers;
711 server->server_type = SILC_ROUTER;
713 if (ptr->backup_router) {
714 server->server_type = SILC_BACKUP_ROUTER;
715 server->backup_router = TRUE;
716 server->id_entry->server_type = SILC_BACKUP_ROUTER;
723 /* Our old config is gone now. We'll unreference our reference made in
724 silc_server_init and then destroy it since we are destroying it
725 underneath the application (layer which called silc_server_init). */
726 silc_server_config_unref(&server->config_ref);
727 silc_server_config_destroy(server->config);
729 /* Take new config context */
730 server->config = newconfig;
731 silc_server_config_ref(&server->config_ref, server->config, server->config);
733 SILC_LOG_DEBUG(("Server rehashed"));
738 /* The heart of the server. This runs the scheduler thus runs the server.
739 When this returns the server has been stopped and the program will
742 void silc_server_run(SilcServer server)
744 SILC_LOG_INFO(("SILC Server started"));
746 /* Start the scheduler, the heart of the SILC server. When this returns
747 the program will be terminated. */
748 silc_schedule(server->schedule);
751 /* Stops the SILC server. This function is used to shutdown the server.
752 This is usually called after the scheduler has returned. After stopping
753 the server one should call silc_server_free. */
755 void silc_server_stop(SilcServer server)
757 SILC_LOG_INFO(("SILC Server shutting down"));
759 if (server->schedule) {
762 server->server_shutdown = TRUE;
764 /* Close all connections */
765 for (i = 0; i < server->config->param.connections_max; i++) {
766 if (!server->sockets[i])
768 if (!SILC_IS_LISTENER(server->sockets[i])) {
769 SilcSocketConnection sock = server->sockets[i];
770 SilcIDListData idata = sock->user_data;
773 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
775 silc_schedule_task_del_by_context(server->schedule,
777 silc_server_disconnect_remote(server, server->sockets[i],
779 "Server is shutting down");
781 silc_server_free_sock_user_data(server, sock,
782 "Server is shutting down");
783 silc_socket_free(sock);
785 silc_socket_free(server->sockets[i]);
786 server->sockets[i] = NULL;
790 /* We are not connected to network anymore */
791 server->standalone = TRUE;
793 silc_schedule_stop(server->schedule);
794 silc_schedule_uninit(server->schedule);
795 server->schedule = NULL;
797 silc_free(server->sockets);
798 server->sockets = NULL;
801 silc_server_protocols_unregister();
803 SILC_LOG_DEBUG(("Server stopped"));
806 /* Function that is called when the network connection to a router has
807 been established. This will continue with the key exchange protocol
808 with the remote router. */
810 void silc_server_start_key_exchange(SilcServer server,
811 SilcServerConnection sconn,
814 SilcSocketConnection newsocket;
815 SilcProtocol protocol;
816 SilcServerKEInternalContext *proto_ctx;
817 SilcServerConfigRouter *conn =
818 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
821 /* Cancel any possible retry timeouts */
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Set socket options */
826 silc_net_set_socket_nonblock(sock);
827 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
829 /* Create socket connection for the connection. Even though we
830 know that we are connecting to a router we will mark the socket
831 to be unknown connection until we have executed authentication
833 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
834 server->sockets[sock] = newsocket;
835 newsocket->hostname = strdup(sconn->remote_host);
836 newsocket->ip = strdup(sconn->remote_host);
837 newsocket->port = sconn->remote_port;
838 sconn->sock = newsocket;
840 /* Allocate internal protocol context. This is sent as context
842 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
843 proto_ctx->server = (void *)server;
844 proto_ctx->context = (void *)sconn;
845 proto_ctx->sock = newsocket;
846 proto_ctx->rng = server->rng;
847 proto_ctx->responder = FALSE;
849 /* Set Key Exchange flags from configuration, but fall back to global
851 SILC_GET_SKE_FLAGS(conn, proto_ctx);
852 if (server->config->param.key_exchange_pfs)
853 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
855 /* Perform key exchange protocol. silc_server_connect_to_router_second
856 will be called after the protocol is finished. */
857 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
858 &protocol, proto_ctx,
859 silc_server_connect_to_router_second);
860 newsocket->protocol = protocol;
862 /* Register a timeout task that will be executed if the protocol
863 is not executed within set limit. */
864 proto_ctx->timeout_task =
865 silc_schedule_task_add(server->schedule, sock,
866 silc_server_timeout_remote,
867 server, server->config->key_exchange_timeout, 0,
871 /* Register the connection for network input and output. This sets
872 that scheduler will listen for incoming packets for this connection
873 and sets that outgoing packets may be sent to this connection as
874 well. However, this doesn't set the scheduler for outgoing traffic,
875 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
876 later when outgoing data is available. */
877 context = (void *)server;
878 SILC_REGISTER_CONNECTION_FOR_IO(sock);
880 /* Run the protocol */
881 silc_protocol_execute(protocol, server->schedule, 0, 0);
884 /* Timeout callback that will be called to retry connecting to remote
885 router. This is used by both normal and router server. This will wait
886 before retrying the connecting. The timeout is generated by exponential
887 backoff algorithm. */
889 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
891 SilcServer server = app_context;
892 SilcServerConnection sconn = (SilcServerConnection)context;
893 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
894 SilcServerConfigConnParams *param =
895 (conn->param ? conn->param : &server->config->param);
897 /* Don't retry if we are shutting down. */
898 if (server->server_shutdown) {
899 silc_server_config_unref(&sconn->conn);
900 silc_free(sconn->remote_host);
901 silc_free(sconn->backup_replace_ip);
906 SILC_LOG_INFO(("Retrying connecting to a router"));
908 /* Calculate next timeout */
909 if (sconn->retry_count >= 1) {
910 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
911 if (sconn->retry_timeout > param->reconnect_interval_max)
912 sconn->retry_timeout = param->reconnect_interval_max;
914 sconn->retry_timeout = param->reconnect_interval;
916 sconn->retry_count++;
917 sconn->retry_timeout = sconn->retry_timeout +
918 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
920 /* If we've reached max retry count, give up. */
921 if ((sconn->retry_count > param->reconnect_count) &&
922 !param->reconnect_keep_trying) {
923 SILC_LOG_ERROR(("Could not connect to router, giving up"));
924 silc_server_config_unref(&sconn->conn);
925 silc_free(sconn->remote_host);
926 silc_free(sconn->backup_replace_ip);
931 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
932 sconn->retry_timeout));
934 /* We will lookup a fresh pointer later */
935 silc_server_config_unref(&sconn->conn);
937 /* Wait one before retrying */
938 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
939 context, sconn->retry_timeout, 0,
940 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
943 /* Generic routine to use connect to a router. */
945 SILC_TASK_CALLBACK(silc_server_connect_router)
947 SilcServer server = app_context;
948 SilcServerConnection sconn = (SilcServerConnection)context;
949 SilcServerConfigRouter *rconn;
952 /* Don't connect if we are shutting down. */
953 if (server->server_shutdown) {
954 silc_free(sconn->remote_host);
955 silc_free(sconn->backup_replace_ip);
960 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
961 (sconn->backup ? "backup router" : "router"),
962 sconn->remote_host, sconn->remote_port));
964 server->router_connect = time(NULL);
965 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
968 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
969 (sconn->backup ? "backup router" : "router"),
970 sconn->remote_host, sconn->remote_port));
971 silc_free(sconn->remote_host);
972 silc_free(sconn->backup_replace_ip);
976 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
978 /* Connect to remote host */
979 sock = silc_net_create_connection(
980 (!server->config->server_info->primary ? NULL :
981 server->config->server_info->primary->server_ip),
982 sconn->remote_port, sconn->remote_host);
984 SILC_LOG_ERROR(("Could not connect to router %s:%d",
985 sconn->remote_host, sconn->remote_port));
986 if (!sconn->no_reconnect)
987 silc_schedule_task_add(server->schedule, 0,
988 silc_server_connect_to_router_retry,
989 context, 0, 1, SILC_TASK_TIMEOUT,
990 SILC_TASK_PRI_NORMAL);
992 silc_server_config_unref(&sconn->conn);
996 /* Continue with key exchange protocol */
997 silc_server_start_key_exchange(server, sconn, sock);
1000 /* This function connects to our primary router or if we are a router this
1001 establishes all our primary routes. This is called at the start of the
1002 server to do authentication and key exchange with our router - called
1005 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1007 SilcServer server = (SilcServer)context;
1008 SilcServerConnection sconn;
1009 SilcServerConfigRouter *ptr;
1011 /* Don't connect if we are shutting down. */
1012 if (server->server_shutdown)
1015 SILC_LOG_DEBUG(("We are %s",
1016 (server->server_type == SILC_SERVER ?
1017 "normal server" : server->server_type == SILC_ROUTER ?
1018 "router" : "backup router/normal server")));
1020 if (!server->config->routers) {
1021 /* There wasn't a configured router, we will continue but we don't
1022 have a connection to outside world. We will be standalone server. */
1023 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1024 server->standalone = TRUE;
1028 /* Cancel any possible retry timeouts */
1029 silc_schedule_task_del_by_callback(server->schedule,
1030 silc_server_connect_router);
1031 silc_schedule_task_del_by_callback(server->schedule,
1032 silc_server_connect_to_router_retry);
1034 /* Create the connections to all our routes */
1035 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1037 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1038 ptr->backup_router ? "Backup router" : "Router",
1039 ptr->initiator ? "Initiator" : "Responder",
1040 ptr->host, ptr->port));
1042 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1043 ptr->initiator == FALSE && !server->backup_router &&
1044 !silc_server_config_get_backup_router(server))
1045 server->wait_backup = TRUE;
1047 if (ptr->initiator) {
1048 /* Check whether we are connected to this host already */
1049 if (silc_server_num_sockets_by_remote(server,
1050 silc_net_is_ip(ptr->host) ?
1052 silc_net_is_ip(ptr->host) ?
1053 NULL : ptr->host, ptr->port,
1054 SILC_SOCKET_TYPE_ROUTER)) {
1055 SILC_LOG_DEBUG(("We are already connected to this router"));
1059 /* Allocate connection object for hold connection specific stuff. */
1060 sconn = silc_calloc(1, sizeof(*sconn));
1061 sconn->remote_host = strdup(ptr->host);
1062 sconn->remote_port = ptr->port;
1063 sconn->backup = ptr->backup_router;
1064 if (sconn->backup) {
1065 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1066 sconn->backup_replace_port = ptr->backup_replace_port;
1069 if (!server->router_conn && !sconn->backup)
1070 server->router_conn = sconn;
1072 silc_schedule_task_add(server->schedule, 0,
1073 silc_server_connect_router,
1074 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1075 SILC_TASK_PRI_NORMAL);
1080 /* Second part of connecting to router(s). Key exchange protocol has been
1081 executed and now we will execute authentication protocol. */
1083 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1085 SilcProtocol protocol = (SilcProtocol)context;
1086 SilcServerKEInternalContext *ctx =
1087 (SilcServerKEInternalContext *)protocol->context;
1088 SilcServer server = (SilcServer)ctx->server;
1089 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1090 SilcSocketConnection sock = ctx->sock;
1091 SilcServerConnAuthInternalContext *proto_ctx;
1092 SilcServerConfigRouter *conn = NULL;
1094 SILC_LOG_DEBUG(("Start"));
1096 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1097 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1098 /* Error occured during protocol */
1099 silc_protocol_free(protocol);
1100 sock->protocol = NULL;
1101 silc_ske_free_key_material(ctx->keymat);
1103 silc_packet_context_free(ctx->packet);
1105 silc_ske_free(ctx->ske);
1106 silc_free(ctx->dest_id);
1108 silc_schedule_task_del_by_callback(server->schedule,
1109 silc_server_failure_callback);
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_schedule_task_del_by_callback(server->schedule,
1154 silc_server_failure_callback);
1155 silc_server_disconnect_remote(server, sock,
1156 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1158 /* Try reconnecting if configuration wants it */
1159 if (!sconn->no_reconnect) {
1160 silc_schedule_task_add(server->schedule, 0,
1161 silc_server_connect_to_router_retry,
1162 sconn, 0, 1, SILC_TASK_TIMEOUT,
1163 SILC_TASK_PRI_NORMAL);
1167 /* Call completion to indicate error */
1168 if (sconn->callback)
1169 (*sconn->callback)(server, NULL, sconn->callback_context);
1171 silc_server_config_unref(&sconn->conn);
1172 silc_free(sconn->remote_host);
1173 silc_free(sconn->backup_replace_ip);
1177 silc_ske_free_key_material(ctx->keymat);
1179 /* Allocate internal context for the authentication protocol. This
1180 is sent as context for the protocol. */
1181 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1182 proto_ctx->server = (void *)server;
1183 proto_ctx->context = (void *)sconn;
1184 proto_ctx->sock = sock;
1185 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1186 proto_ctx->dest_id_type = ctx->dest_id_type;
1187 proto_ctx->dest_id = ctx->dest_id;
1189 /* Resolve the authentication method used in this connection. Check if
1190 we find a match from user configured connections */
1191 if (!sconn->conn.ref_ptr)
1192 conn = silc_server_config_find_router_conn(server, sock->hostname,
1195 conn = sconn->conn.ref_ptr;
1198 /* Match found. Use the configured authentication method. Take only
1199 the passphrase, since for public key auth we automatically use
1200 our local key pair. */
1201 if (conn->passphrase) {
1202 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1203 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1205 proto_ctx->auth_data = strdup(conn->passphrase);
1206 proto_ctx->auth_data_len = strlen(conn->passphrase);
1207 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1209 } else if (conn->publickeys) {
1210 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1212 proto_ctx->auth_meth = SILC_AUTH_NONE;
1215 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1216 sock->hostname, sock->ip, sock->port));
1217 silc_protocol_free(protocol);
1218 sock->protocol = NULL;
1220 silc_packet_context_free(ctx->packet);
1222 silc_ske_free(ctx->ske);
1223 silc_free(ctx->dest_id);
1225 silc_server_config_unref(&sconn->conn);
1226 silc_free(sconn->remote_host);
1227 silc_free(sconn->backup_replace_ip);
1229 silc_schedule_task_del_by_callback(server->schedule,
1230 silc_server_failure_callback);
1231 silc_server_disconnect_remote(server, sock,
1232 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1236 /* Free old protocol as it is finished now */
1237 silc_protocol_free(protocol);
1239 silc_packet_context_free(ctx->packet);
1241 sock->protocol = NULL;
1243 /* Allocate the authentication protocol. This is allocated here
1244 but we won't start it yet. We will be receiving party of this
1245 protocol thus we will wait that connecting party will make
1246 their first move. */
1247 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1248 &sock->protocol, proto_ctx,
1249 silc_server_connect_to_router_final);
1251 /* Register timeout task. If the protocol is not executed inside
1252 this timelimit the connection will be terminated. */
1253 proto_ctx->timeout_task =
1254 silc_schedule_task_add(server->schedule, sock->sock,
1255 silc_server_timeout_remote,
1257 server->config->conn_auth_timeout, 0,
1261 /* Run the protocol */
1262 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1265 /* Finalizes the connection to router. Registers a server task to the
1266 queue so that we can accept new connections. */
1268 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1270 SilcProtocol protocol = (SilcProtocol)context;
1271 SilcServerConnAuthInternalContext *ctx =
1272 (SilcServerConnAuthInternalContext *)protocol->context;
1273 SilcServer server = (SilcServer)ctx->server;
1274 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1275 SilcSocketConnection sock = ctx->sock;
1276 SilcServerEntry id_entry = NULL;
1278 unsigned char *id_string;
1280 SilcIDListData idata;
1281 SilcServerConfigRouter *conn = NULL;
1282 SilcServerConfigConnParams *param = NULL;
1284 SILC_LOG_DEBUG(("Start"));
1286 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1287 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1288 /* Error occured during protocol */
1289 silc_free(ctx->dest_id);
1290 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1293 /* Try reconnecting if configuration wants it */
1294 if (!sconn->no_reconnect) {
1295 silc_schedule_task_add(server->schedule, 0,
1296 silc_server_connect_to_router_retry,
1297 sconn, 0, 1, SILC_TASK_TIMEOUT,
1298 SILC_TASK_PRI_NORMAL);
1305 /* Add a task to the queue. This task receives new connections to the
1306 server. This task remains on the queue until the end of the program. */
1307 if (!server->listenning && !sconn->backup) {
1308 silc_schedule_task_add(server->schedule, server->sock,
1309 silc_server_accept_new_connection,
1310 (void *)server, 0, 0,
1312 SILC_TASK_PRI_NORMAL);
1313 server->listenning = TRUE;
1316 /* Send NEW_SERVER packet to the router. We will become registered
1317 to the SILC network after sending this packet. */
1318 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1319 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1320 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1321 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1322 silc_buffer_format(packet,
1323 SILC_STR_UI_SHORT(id_len),
1324 SILC_STR_UI_XNSTRING(id_string, id_len),
1325 SILC_STR_UI_SHORT(strlen(server->server_name)),
1326 SILC_STR_UI_XNSTRING(server->server_name,
1327 strlen(server->server_name)),
1330 /* Send the packet */
1331 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1332 packet->data, packet->len, TRUE);
1333 silc_buffer_free(packet);
1334 silc_free(id_string);
1336 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1338 /* Check that we do not have this ID already */
1339 id_entry = silc_idlist_find_server_by_id(server->local_list,
1340 ctx->dest_id, TRUE, NULL);
1342 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1344 id_entry = silc_idlist_find_server_by_id(server->global_list,
1345 ctx->dest_id, TRUE, NULL);
1347 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1350 SILC_LOG_DEBUG(("New server id(%s)",
1351 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1353 /* Add the connected router to global server list. Router is sent
1354 as NULL since it's local to us. */
1355 id_entry = silc_idlist_add_server(server->global_list,
1356 strdup(sock->hostname),
1357 SILC_ROUTER, ctx->dest_id, NULL, sock);
1359 silc_free(ctx->dest_id);
1360 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1361 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1366 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1367 silc_free(sock->user_data);
1368 sock->user_data = (void *)id_entry;
1369 sock->type = SILC_SOCKET_TYPE_ROUTER;
1370 idata = (SilcIDListData)sock->user_data;
1371 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1372 SILC_IDLIST_STATUS_LOCAL);
1374 conn = sconn->conn.ref_ptr;
1375 param = &server->config->param;
1376 if (conn && conn->param)
1377 param = conn->param;
1379 /* Perform keepalive. */
1380 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1381 silc_server_perform_heartbeat,
1384 /* Register re-key timeout */
1385 idata->rekey->timeout = param->key_exchange_rekey;
1386 silc_schedule_task_add(server->schedule, sock->sock,
1387 silc_server_rekey_callback,
1388 (void *)sock, idata->rekey->timeout, 0,
1389 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1391 if (!sconn->backup) {
1392 /* Mark this router our primary router if we're still standalone */
1393 if (server->standalone) {
1394 SILC_LOG_DEBUG(("This connection is our primary router"));
1395 server->id_entry->router = id_entry;
1396 server->router = id_entry;
1397 server->standalone = FALSE;
1399 /* If we are router then announce our possible servers. Backup
1400 router announces also global servers. */
1401 if (server->server_type == SILC_ROUTER)
1402 silc_server_announce_servers(server,
1403 server->backup_router ? TRUE : FALSE,
1404 0, SILC_PRIMARY_ROUTE(server));
1406 /* Announce our clients and channels to the router */
1407 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1408 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1410 /* If we are backup router then this primary router is whom we are
1412 if (server->server_type == SILC_BACKUP_ROUTER)
1413 silc_server_backup_add(server, server->id_entry, sock->ip,
1414 sconn->remote_port, TRUE);
1417 /* Add this server to be our backup router */
1418 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1419 sconn->backup_replace_port, FALSE);
1422 sock->protocol = NULL;
1425 /* Call the completion callback to indicate that we've connected to
1427 if (sconn && sconn->callback)
1428 (*sconn->callback)(server, id_entry, sconn->callback_context);
1430 /* Free the temporary connection data context */
1432 silc_server_config_unref(&sconn->conn);
1433 silc_free(sconn->remote_host);
1434 silc_free(sconn->backup_replace_ip);
1437 if (sconn == server->router_conn)
1438 server->router_conn = NULL;
1441 /* Free the protocol object */
1442 if (sock->protocol == protocol)
1443 sock->protocol = NULL;
1444 silc_protocol_free(protocol);
1446 silc_packet_context_free(ctx->packet);
1448 silc_ske_free(ctx->ske);
1449 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1450 silc_free(ctx->auth_data);
1454 /* Host lookup callback that is called after the incoming connection's
1455 IP and FQDN lookup is performed. This will actually check the acceptance
1456 of the incoming connection and will register the key exchange protocol
1457 for this connection. */
1460 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1463 SilcServerKEInternalContext *proto_ctx =
1464 (SilcServerKEInternalContext *)context;
1465 SilcServer server = (SilcServer)proto_ctx->server;
1466 SilcServerConfigClient *cconfig = NULL;
1467 SilcServerConfigServer *sconfig = NULL;
1468 SilcServerConfigRouter *rconfig = NULL;
1469 SilcServerConfigDeny *deny;
1472 /* Check whether we could resolve both IP and FQDN. */
1473 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1474 server->config->require_reverse_lookup)) {
1475 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1476 sock->hostname ? sock->hostname :
1477 sock->ip ? sock->ip : ""));
1478 server->stat.conn_failures++;
1479 silc_server_disconnect_remote(server, sock,
1480 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1481 "Unknown host or IP");
1482 silc_free(proto_ctx);
1486 /* Register the connection for network input and output. This sets
1487 that scheduler will listen for incoming packets for this connection
1488 and sets that outgoing packets may be sent to this connection as well.
1489 However, this doesn't set the scheduler for outgoing traffic, it
1490 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1491 later when outgoing data is available. */
1492 context = (void *)server;
1493 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1495 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1498 /* Listenning port */
1499 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1500 silc_server_disconnect_remote(server, sock,
1501 SILC_STATUS_ERR_RESOURCE_LIMIT,
1502 "Connection refused");
1503 server->stat.conn_failures++;
1504 silc_free(proto_ctx);
1507 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1509 /* Check whether this connection is denied to connect to us. */
1510 deny = silc_server_config_find_denied(server, sock->ip);
1512 deny = silc_server_config_find_denied(server, sock->hostname);
1514 /* The connection is denied */
1515 SILC_LOG_INFO(("Connection %s (%s) is denied",
1516 sock->hostname, sock->ip));
1517 silc_server_disconnect_remote(server, sock,
1518 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1520 server->stat.conn_failures++;
1521 silc_free(proto_ctx);
1525 /* Check whether we have configured this sort of connection at all. We
1526 have to check all configurations since we don't know what type of
1527 connection this is. */
1528 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1529 cconfig = silc_server_config_find_client(server, sock->hostname);
1530 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1531 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1532 if (server->server_type == SILC_ROUTER) {
1533 if (!(rconfig = silc_server_config_find_router_conn(server,
1534 sock->ip, sock->port)))
1535 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1538 if (!cconfig && !sconfig && !rconfig) {
1539 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1541 silc_server_disconnect_remote(server, sock,
1542 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1543 server->stat.conn_failures++;
1544 silc_free(proto_ctx);
1548 /* The connection is allowed */
1550 /* Set internal context for key exchange protocol. This is
1551 sent as context for the protocol. */
1552 proto_ctx->sock = sock;
1553 proto_ctx->rng = server->rng;
1554 proto_ctx->responder = TRUE;
1555 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1556 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1557 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1559 /* Take flags for key exchange. Since we do not know what type of connection
1560 this is, we go through all found configurations and use the global ones
1561 as well. This will result always into strictest key exchange flags. */
1562 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1563 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1564 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1565 if (server->config->param.key_exchange_pfs)
1566 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1568 /* Prepare the connection for key exchange protocol. We allocate the
1569 protocol but will not start it yet. The connector will be the
1570 initiator of the protocol thus we will wait for initiation from
1571 there before we start the protocol. */
1572 server->stat.auth_attempts++;
1573 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1574 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1575 &sock->protocol, proto_ctx,
1576 silc_server_accept_new_connection_second);
1578 /* Register a timeout task that will be executed if the connector
1579 will not start the key exchange protocol within specified timeout
1580 and the connection will be closed. */
1581 proto_ctx->timeout_task =
1582 silc_schedule_task_add(server->schedule, sock->sock,
1583 silc_server_timeout_remote,
1585 server->config->key_exchange_timeout, 0,
1590 /* Accepts new connections to the server. Accepting new connections are
1591 done in three parts to make it async. */
1593 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1595 SilcServer server = (SilcServer)context;
1596 SilcSocketConnection newsocket;
1597 SilcServerKEInternalContext *proto_ctx;
1600 SILC_LOG_DEBUG(("Accepting new connection"));
1602 server->stat.conn_attempts++;
1604 sock = silc_net_accept_connection(fd);
1606 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1607 server->stat.conn_failures++;
1611 /* Check for maximum allowed connections */
1612 if (sock > server->config->param.connections_max) {
1613 SILC_LOG_ERROR(("Refusing connection, server is full"));
1614 server->stat.conn_failures++;
1615 silc_net_close_connection(sock);
1619 /* Set socket options */
1620 silc_net_set_socket_nonblock(sock);
1621 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1623 /* We don't create a ID yet, since we don't know what type of connection
1624 this is yet. But, we do add the connection to the socket table. */
1625 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1626 server->sockets[sock] = newsocket;
1628 /* Perform asynchronous host lookup. This will lookup the IP and the
1629 FQDN of the remote connection. After the lookup is done the connection
1630 is accepted further. */
1631 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1632 proto_ctx->server = server;
1633 proto_ctx->context = (void *)fd;
1634 silc_socket_host_lookup(newsocket, TRUE,
1635 silc_server_accept_new_connection_lookup,
1636 (void *)proto_ctx, server->schedule);
1639 /* Second part of accepting new connection. Key exchange protocol has been
1640 performed and now it is time to do little connection authentication
1641 protocol to figure out whether this connection is client or server
1642 and whether it has right to access this server (especially server
1643 connections needs to be authenticated). */
1645 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1647 SilcProtocol protocol = (SilcProtocol)context;
1648 SilcServerKEInternalContext *ctx =
1649 (SilcServerKEInternalContext *)protocol->context;
1650 SilcServer server = (SilcServer)ctx->server;
1651 SilcSocketConnection sock = ctx->sock;
1652 SilcServerConnAuthInternalContext *proto_ctx;
1654 SILC_LOG_DEBUG(("Start"));
1656 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1657 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1658 /* Error occured during protocol */
1659 SILC_LOG_DEBUG(("Error key exchange protocol"));
1660 silc_protocol_free(protocol);
1661 sock->protocol = NULL;
1662 silc_ske_free_key_material(ctx->keymat);
1664 silc_packet_context_free(ctx->packet);
1666 silc_ske_free(ctx->ske);
1667 silc_free(ctx->dest_id);
1668 silc_server_config_unref(&ctx->cconfig);
1669 silc_server_config_unref(&ctx->sconfig);
1670 silc_server_config_unref(&ctx->rconfig);
1672 silc_schedule_task_del_by_callback(server->schedule,
1673 silc_server_failure_callback);
1674 silc_server_disconnect_remote(server, sock,
1675 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1677 server->stat.auth_failures++;
1681 /* We now have the key material as the result of the key exchange
1682 protocol. Take the key material into use. Free the raw key material
1683 as soon as we've set them into use. */
1684 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1685 ctx->sock, ctx->keymat,
1686 ctx->ske->prop->cipher,
1687 ctx->ske->prop->pkcs,
1688 ctx->ske->prop->hash,
1689 ctx->ske->prop->hmac,
1690 ctx->ske->prop->group,
1692 SILC_LOG_ERROR(("Error setting key material in use"));
1693 silc_protocol_free(protocol);
1694 sock->protocol = NULL;
1695 silc_ske_free_key_material(ctx->keymat);
1697 silc_packet_context_free(ctx->packet);
1699 silc_ske_free(ctx->ske);
1700 silc_free(ctx->dest_id);
1701 silc_server_config_unref(&ctx->cconfig);
1702 silc_server_config_unref(&ctx->sconfig);
1703 silc_server_config_unref(&ctx->rconfig);
1705 silc_schedule_task_del_by_callback(server->schedule,
1706 silc_server_failure_callback);
1707 silc_server_disconnect_remote(server, sock,
1708 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1709 server->stat.auth_failures++;
1712 silc_ske_free_key_material(ctx->keymat);
1714 /* Allocate internal context for the authentication protocol. This
1715 is sent as context for the protocol. */
1716 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1717 proto_ctx->server = (void *)server;
1718 proto_ctx->sock = sock;
1719 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1720 proto_ctx->responder = TRUE;
1721 proto_ctx->dest_id_type = ctx->dest_id_type;
1722 proto_ctx->dest_id = ctx->dest_id;
1723 proto_ctx->cconfig = ctx->cconfig;
1724 proto_ctx->sconfig = ctx->sconfig;
1725 proto_ctx->rconfig = ctx->rconfig;
1727 /* Free old protocol as it is finished now */
1728 silc_protocol_free(protocol);
1730 silc_packet_context_free(ctx->packet);
1732 sock->protocol = NULL;
1734 /* Allocate the authentication protocol. This is allocated here
1735 but we won't start it yet. We will be receiving party of this
1736 protocol thus we will wait that connecting party will make
1737 their first move. */
1738 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1739 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1740 &sock->protocol, proto_ctx,
1741 silc_server_accept_new_connection_final);
1743 /* Register timeout task. If the protocol is not executed inside
1744 this timelimit the connection will be terminated. */
1745 proto_ctx->timeout_task =
1746 silc_schedule_task_add(server->schedule, sock->sock,
1747 silc_server_timeout_remote,
1749 server->config->conn_auth_timeout, 0,
1754 /* After this is called, server don't wait for backup router anymore.
1755 This gets called automatically even after we have backup router
1756 connection established. */
1758 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1760 SilcServer server = context;
1761 server->wait_backup = FALSE;
1764 /* Final part of accepting new connection. The connection has now
1765 been authenticated and keys has been exchanged. We also know whether
1766 this is client or server connection. */
1768 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1770 SilcProtocol protocol = (SilcProtocol)context;
1771 SilcServerConnAuthInternalContext *ctx =
1772 (SilcServerConnAuthInternalContext *)protocol->context;
1773 SilcServer server = (SilcServer)ctx->server;
1774 SilcSocketConnection sock = ctx->sock;
1775 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1777 SilcServerConfigConnParams *param = &server->config->param;
1779 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1780 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1781 /* Error occured during protocol */
1782 SILC_LOG_DEBUG(("Error during authentication protocol"));
1783 silc_protocol_free(protocol);
1784 sock->protocol = NULL;
1786 silc_packet_context_free(ctx->packet);
1788 silc_ske_free(ctx->ske);
1789 silc_free(ctx->dest_id);
1790 silc_server_config_unref(&ctx->cconfig);
1791 silc_server_config_unref(&ctx->sconfig);
1792 silc_server_config_unref(&ctx->rconfig);
1794 silc_schedule_task_del_by_callback(server->schedule,
1795 silc_server_failure_callback);
1796 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1798 server->stat.auth_failures++;
1802 entry->data.last_receive = time(NULL);
1804 switch (ctx->conn_type) {
1805 case SILC_SOCKET_TYPE_CLIENT:
1807 SilcClientEntry client;
1808 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1810 /* Verify whether this connection is after all allowed to connect */
1811 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1812 &server->config->param,
1813 conn->param, ctx->ske)) {
1814 server->stat.auth_failures++;
1818 /* If we are primary router and we have backup router configured
1819 but it has not connected to use yet, do not accept any other
1821 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1822 !server->backup_router) {
1823 SilcServerConfigRouter *router;
1824 router = silc_server_config_get_backup_router(server);
1825 if (router && strcmp(server->config->server_info->primary->server_ip,
1827 silc_server_find_socket_by_host(server,
1828 SILC_SOCKET_TYPE_SERVER,
1829 router->backup_replace_ip, 0)) {
1830 SILC_LOG_INFO(("Will not accept connections because we do "
1831 "not have backup router connection established"));
1832 silc_server_disconnect_remote(server, sock,
1833 SILC_STATUS_ERR_PERM_DENIED,
1834 "We do not have connection to backup "
1835 "router established, try later");
1836 silc_free(sock->user_data);
1837 server->stat.auth_failures++;
1839 /* From here on, wait 10 seconds for the backup router to appear. */
1840 silc_schedule_task_add(server->schedule, 0,
1841 silc_server_backup_router_wait,
1842 (void *)server, 10, 0,
1843 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1848 SILC_LOG_DEBUG(("Remote host is client"));
1849 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1852 /* Add the client to the client ID cache. The nickname and Client ID
1853 and other information is created after we have received NEW_CLIENT
1854 packet from client. */
1855 client = silc_idlist_add_client(server->local_list,
1856 NULL, NULL, NULL, NULL, NULL, sock, 0);
1858 SILC_LOG_ERROR(("Could not add new client to cache"));
1859 silc_free(sock->user_data);
1860 silc_server_disconnect_remote(server, sock,
1861 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1862 server->stat.auth_failures++;
1865 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1868 server->stat.my_clients++;
1869 server->stat.clients++;
1870 server->stat.cell_clients++;
1872 /* Get connection parameters */
1874 param = conn->param;
1876 if (!param->keepalive_secs)
1877 param->keepalive_secs = server->config->param.keepalive_secs;
1879 if (!param->qos && server->config->param.qos) {
1880 param->qos = server->config->param.qos;
1881 param->qos_rate_limit = server->config->param.qos_rate_limit;
1882 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1883 param->qos_limit_sec = server->config->param.qos_limit_sec;
1884 param->qos_limit_usec = server->config->param.qos_limit_usec;
1887 /* Check if to be anonymous connection */
1888 if (param->anonymous)
1889 client->mode |= SILC_UMODE_ANONYMOUS;
1892 id_entry = (void *)client;
1895 case SILC_SOCKET_TYPE_SERVER:
1896 case SILC_SOCKET_TYPE_ROUTER:
1898 SilcServerEntry new_server;
1899 bool initiator = FALSE;
1900 bool backup_local = FALSE;
1901 bool backup_router = FALSE;
1902 char *backup_replace_ip = NULL;
1903 SilcUInt16 backup_replace_port = 0;
1904 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1905 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1907 /* If we are backup router and this is incoming server connection
1908 and we do not have connection to primary router, do not allow
1910 if (server->server_type == SILC_BACKUP_ROUTER &&
1911 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1912 !SILC_PRIMARY_ROUTE(server)) {
1913 SILC_LOG_INFO(("Will not accept server connection because we do "
1914 "not have primary router connection established"));
1915 silc_server_disconnect_remote(server, sock,
1916 SILC_STATUS_ERR_PERM_DENIED,
1917 "We do not have connection to primary "
1918 "router established, try later");
1919 silc_free(sock->user_data);
1920 server->stat.auth_failures++;
1924 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1925 /* Verify whether this connection is after all allowed to connect */
1926 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1927 &server->config->param,
1928 rconn ? rconn->param : NULL,
1930 silc_free(sock->user_data);
1931 server->stat.auth_failures++;
1937 param = rconn->param;
1939 if (!param->keepalive_secs)
1940 param->keepalive_secs = server->config->param.keepalive_secs;
1942 if (!param->qos && server->config->param.qos) {
1943 param->qos = server->config->param.qos;
1944 param->qos_rate_limit = server->config->param.qos_rate_limit;
1945 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1946 param->qos_limit_sec = server->config->param.qos_limit_sec;
1947 param->qos_limit_usec = server->config->param.qos_limit_usec;
1951 initiator = rconn->initiator;
1952 backup_local = rconn->backup_local;
1953 backup_router = rconn->backup_router;
1954 backup_replace_ip = rconn->backup_replace_ip;
1955 backup_replace_port = rconn->backup_replace_port;
1959 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1960 /* Verify whether this connection is after all allowed to connect */
1961 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1962 &server->config->param,
1963 sconn ? sconn->param : NULL,
1965 silc_free(sock->user_data);
1966 server->stat.auth_failures++;
1971 param = rconn->param;
1973 if (!param->keepalive_secs)
1974 param->keepalive_secs = server->config->param.keepalive_secs;
1976 if (!param->qos && server->config->param.qos) {
1977 param->qos = server->config->param.qos;
1978 param->qos_rate_limit = server->config->param.qos_rate_limit;
1979 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1980 param->qos_limit_sec = server->config->param.qos_limit_sec;
1981 param->qos_limit_usec = server->config->param.qos_limit_usec;
1985 backup_router = sconn->backup_router;
1989 /* If we are primary router and we have backup router configured
1990 but it has not connected to use yet, do not accept any other
1992 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1993 !server->backup_router && !backup_router) {
1994 SilcServerConfigRouter *router;
1995 router = silc_server_config_get_backup_router(server);
1996 if (router && strcmp(server->config->server_info->primary->server_ip,
1998 silc_server_find_socket_by_host(server,
1999 SILC_SOCKET_TYPE_SERVER,
2000 router->backup_replace_ip, 0)) {
2001 SILC_LOG_INFO(("Will not accept connections because we do "
2002 "not have backup router connection established"));
2003 silc_server_disconnect_remote(server, sock,
2004 SILC_STATUS_ERR_PERM_DENIED,
2005 "We do not have connection to backup "
2006 "router established, try later");
2007 silc_free(sock->user_data);
2008 server->stat.auth_failures++;
2010 /* From here on, wait 10 seconds for the backup router to appear. */
2011 silc_schedule_task_add(server->schedule, 0,
2012 silc_server_backup_router_wait,
2013 (void *)server, 10, 0,
2014 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2019 SILC_LOG_DEBUG(("Remote host is %s",
2020 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2021 "server" : (backup_router ?
2022 "backup router" : "router")));
2023 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2024 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2025 "server" : (backup_router ?
2026 "backup router" : "router")));
2028 /* Add the server into server cache. The server name and Server ID
2029 is updated after we have received NEW_SERVER packet from the
2030 server. We mark ourselves as router for this server if we really
2033 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2034 server->local_list : (backup_router ?
2035 server->local_list :
2036 server->global_list)),
2038 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2039 SILC_SERVER : SILC_ROUTER),
2041 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2042 server->id_entry : (backup_router ?
2043 server->id_entry : NULL)),
2046 SILC_LOG_ERROR(("Could not add new server to cache"));
2047 silc_free(sock->user_data);
2048 silc_server_disconnect_remote(server, sock,
2049 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2050 server->stat.auth_failures++;
2053 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2055 id_entry = (void *)new_server;
2057 /* If the incoming connection is router and marked as backup router
2058 then add it to be one of our backups */
2059 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2060 /* Change it back to SERVER type since that's what it really is. */
2062 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2063 new_server->server_type = SILC_BACKUP_ROUTER;
2065 /* Remove the backup waiting with timeout */
2066 silc_schedule_task_add(server->schedule, 0,
2067 silc_server_backup_router_wait,
2068 (void *)server, 5, 0,
2069 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2073 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2074 server->stat.my_servers++;
2076 server->stat.my_routers++;
2077 server->stat.routers++;
2079 server->stat.servers++;
2081 /* Check whether this connection is to be our primary router connection
2082 if we do not already have the primary route. */
2083 if (!backup_router &&
2084 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2085 if (silc_server_config_is_primary_route(server) && !initiator)
2088 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2089 server->standalone = FALSE;
2090 if (!server->id_entry->router) {
2091 server->id_entry->router = id_entry;
2092 server->router = id_entry;
2103 sock->type = ctx->conn_type;
2105 /* Add the common data structure to the ID entry. */
2106 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2108 /* Add to sockets internal pointer for fast referencing */
2109 silc_free(sock->user_data);
2110 sock->user_data = id_entry;
2112 /* Connection has been fully established now. Everything is ok. */
2113 SILC_LOG_DEBUG(("New connection authenticated"));
2115 /* Perform keepalive. */
2116 if (param->keepalive_secs)
2117 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2118 silc_server_perform_heartbeat,
2121 /* Perform Quality of Service */
2123 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2124 param->qos_limit_sec, param->qos_limit_usec,
2128 silc_schedule_task_del_by_callback(server->schedule,
2129 silc_server_failure_callback);
2130 silc_protocol_free(protocol);
2132 silc_packet_context_free(ctx->packet);
2134 silc_ske_free(ctx->ske);
2135 silc_free(ctx->dest_id);
2136 silc_server_config_unref(&ctx->cconfig);
2137 silc_server_config_unref(&ctx->sconfig);
2138 silc_server_config_unref(&ctx->rconfig);
2140 sock->protocol = NULL;
2143 /* This function is used to read packets from network and send packets to
2144 network. This is usually a generic task. */
2146 SILC_TASK_CALLBACK(silc_server_packet_process)
2148 SilcServer server = (SilcServer)context;
2149 SilcSocketConnection sock = server->sockets[fd];
2150 SilcIDListData idata;
2151 SilcCipher cipher = NULL;
2152 SilcHmac hmac = NULL;
2153 SilcUInt32 sequence = 0;
2157 SILC_LOG_DEBUG(("Unknown socket connection"));
2161 /* Packet sending */
2163 if (type == SILC_TASK_WRITE) {
2164 /* Do not send data to disconnected connection */
2165 if (SILC_IS_DISCONNECTED(sock)) {
2166 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2170 server->stat.packets_sent++;
2172 /* Send the packet */
2173 ret = silc_packet_send(sock, TRUE);
2175 /* If returned -2 could not write to connection now, will do
2181 SILC_LOG_ERROR(("Error sending packet to connection "
2182 "%s:%d [%s]", sock->hostname, sock->port,
2183 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2184 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2185 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2190 /* The packet has been sent and now it is time to set the connection
2191 back to only for input. When there is again some outgoing data
2192 available for this connection it will be set for output as well.
2193 This call clears the output setting and sets it only for input. */
2194 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2195 SILC_UNSET_OUTBUF_PENDING(sock);
2197 silc_buffer_clear(sock->outbuf);
2201 /* Packet receiving */
2203 /* Read some data from connection */
2204 ret = silc_packet_receive(sock);
2208 SILC_LOG_ERROR(("Error receiving packet from connection "
2209 "%s:%d [%s] %s", sock->hostname, sock->port,
2210 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2211 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2212 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2213 "Router"), strerror(errno)));
2219 SILC_LOG_DEBUG(("Read EOF"));
2221 /* If connection is disconnecting already we will finally
2222 close the connection */
2223 if (SILC_IS_DISCONNECTING(sock)) {
2224 if (sock->user_data)
2225 silc_server_free_sock_user_data(server, sock, NULL);
2226 silc_server_close_connection(server, sock);
2230 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2231 SILC_SET_DISCONNECTING(sock);
2233 if (sock->user_data) {
2235 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2236 silc_server_free_sock_user_data(server, sock, tmp);
2238 silc_server_free_sock_user_data(server, sock, NULL);
2239 } else if (server->router_conn && server->router_conn->sock == sock &&
2240 !server->router && server->standalone)
2241 silc_schedule_task_add(server->schedule, 0,
2242 silc_server_connect_to_router,
2245 SILC_TASK_PRI_NORMAL);
2247 silc_server_close_connection(server, sock);
2251 /* If connection is disconnecting or disconnected we will ignore
2253 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2254 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2258 /* Get keys and stuff from ID entry */
2259 idata = (SilcIDListData)sock->user_data;
2261 cipher = idata->receive_key;
2262 hmac = idata->hmac_receive;
2263 sequence = idata->psn_receive;
2266 /* Process the packet. This will call the parser that will then
2267 decrypt and parse the packet. */
2268 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2269 TRUE : FALSE, cipher, hmac, sequence,
2270 silc_server_packet_parse, server);
2272 /* If processing failed the connection is closed. */
2274 /* On packet processing errors we may close our primary router
2275 connection but won't become primary router if we are the backup
2276 since this is local error condition. */
2277 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2278 server->backup_noswitch = TRUE;
2280 if (sock->user_data)
2281 silc_server_free_sock_user_data(server, sock, NULL);
2282 silc_server_close_connection(server, sock);
2286 /* Parses whole packet, received earlier. */
2288 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2290 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2291 SilcServer server = (SilcServer)parse_ctx->context;
2292 SilcSocketConnection sock = parse_ctx->sock;
2293 SilcPacketContext *packet = parse_ctx->packet;
2294 SilcIDListData idata = (SilcIDListData)sock->user_data;
2297 server->stat.packets_received++;
2299 /* Parse the packet */
2300 if (parse_ctx->normal)
2301 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2303 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2305 /* If entry is disabled ignore what we got. */
2306 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2307 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2308 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2309 SILC_LOG_DEBUG(("Connection is disabled"));
2313 if (ret == SILC_PACKET_NONE) {
2314 SILC_LOG_DEBUG(("Error parsing packet"));
2318 /* Check that the the current client ID is same as in the client's packet. */
2319 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2320 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2321 if (client && client->id && packet->src_id) {
2322 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2323 packet->src_id_type);
2324 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2326 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2333 if (server->server_type == SILC_ROUTER) {
2334 /* Route the packet if it is not destined to us. Other ID types but
2335 server are handled separately after processing them. */
2336 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2337 packet->dst_id_type == SILC_ID_SERVER &&
2338 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2339 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2341 /* Route the packet to fastest route for the destination ID */
2342 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2343 packet->dst_id_type);
2346 silc_server_packet_route(server,
2347 silc_server_route_get(server, id,
2348 packet->dst_id_type),
2355 /* Parse the incoming packet type */
2356 silc_server_packet_parse_type(server, sock, packet);
2358 /* Broadcast packet if it is marked as broadcast packet and it is
2359 originated from router and we are router. */
2360 if (server->server_type == SILC_ROUTER &&
2361 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2362 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2363 /* Broadcast to our primary route */
2364 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2366 /* If we have backup routers then we need to feed all broadcast
2367 data to those servers. */
2368 silc_server_backup_broadcast(server, sock, packet);
2372 silc_packet_context_free(packet);
2373 silc_free(parse_ctx);
2376 /* Parser callback called by silc_packet_receive_process. This merely
2377 registers timeout that will handle the actual parsing when appropriate. */
2379 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2382 SilcServer server = (SilcServer)context;
2383 SilcSocketConnection sock = parser_context->sock;
2384 SilcIDListData idata = (SilcIDListData)sock->user_data;
2388 idata->psn_receive = parser_context->packet->sequence + 1;
2390 /* If protocol for this connection is key exchange or rekey then we'll
2391 process all packets synchronously, since there might be packets in
2392 queue that we are not able to decrypt without first processing the
2393 packets before them. */
2394 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2395 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2396 (sock->protocol && sock->protocol->protocol &&
2397 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2398 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2399 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2402 /* Reprocess data since we'll return FALSE here. This is because
2403 the idata->receive_key might have become valid in the last packet
2404 and we want to call this processor with valid cipher. */
2406 ret = silc_packet_receive_process(
2407 sock, server->server_type == SILC_ROUTER ?
2408 TRUE : FALSE, idata->receive_key,
2409 idata->hmac_receive, idata->psn_receive,
2410 silc_server_packet_parse, server);
2412 ret = silc_packet_receive_process(
2413 sock, server->server_type == SILC_ROUTER ?
2414 TRUE : FALSE, NULL, NULL, 0,
2415 silc_server_packet_parse, server);
2418 /* On packet processing errors we may close our primary router
2419 connection but won't become primary router if we are the backup
2420 since this is local error condition. */
2421 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2422 server->backup_noswitch = TRUE;
2424 if (sock->user_data)
2425 silc_server_free_sock_user_data(server, sock, NULL);
2426 silc_server_close_connection(server, sock);
2432 switch (sock->type) {
2433 case SILC_SOCKET_TYPE_UNKNOWN:
2434 case SILC_SOCKET_TYPE_CLIENT:
2435 /* Parse the packet with timeout */
2436 silc_schedule_task_add(server->schedule, sock->sock,
2437 silc_server_packet_parse_real,
2438 (void *)parser_context, 0, 100000,
2440 SILC_TASK_PRI_NORMAL);
2442 case SILC_SOCKET_TYPE_SERVER:
2443 case SILC_SOCKET_TYPE_ROUTER:
2444 /* Packets from servers are parsed immediately */
2445 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2455 /* Parses the packet type and calls what ever routines the packet type
2456 requires. This is done for all incoming packets. */
2458 void silc_server_packet_parse_type(SilcServer server,
2459 SilcSocketConnection sock,
2460 SilcPacketContext *packet)
2462 SilcPacketType type = packet->type;
2463 SilcIDListData idata = (SilcIDListData)sock->user_data;
2465 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2466 silc_get_packet_name(type), packet->flags));
2468 /* Parse the packet type */
2470 case SILC_PACKET_DISCONNECT:
2473 char *message = NULL;
2475 if (packet->flags & SILC_PACKET_FLAG_LIST)
2477 if (packet->buffer->len < 1)
2480 status = (SilcStatus)packet->buffer->data[0];
2481 if (packet->buffer->len > 1 &&
2482 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2483 message = silc_memdup(packet->buffer->data + 1,
2484 packet->buffer->len - 1);
2486 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2487 sock->ip, sock->hostname,
2488 silc_get_status_message(status), status,
2489 message ? message : ""));
2492 /* Handle the disconnection from our end too */
2493 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2494 silc_server_free_sock_user_data(server, sock, NULL);
2495 silc_server_close_connection(server, sock);
2499 case SILC_PACKET_SUCCESS:
2501 * Success received for something. For now we can have only
2502 * one protocol for connection executing at once hence this
2503 * success message is for whatever protocol is executing currently.
2505 if (packet->flags & SILC_PACKET_FLAG_LIST)
2508 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2511 case SILC_PACKET_FAILURE:
2513 * Failure received for something. For now we can have only
2514 * one protocol for connection executing at once hence this
2515 * failure message is for whatever protocol is executing currently.
2517 if (packet->flags & SILC_PACKET_FLAG_LIST)
2519 if (sock->protocol) {
2520 SilcServerFailureContext f;
2521 f = silc_calloc(1, sizeof(*f));
2522 f->sock = silc_socket_dup(sock);
2524 /* We will wait 5 seconds to process this failure packet */
2525 silc_schedule_task_add(server->schedule, sock->sock,
2526 silc_server_failure_callback, (void *)f, 5, 0,
2527 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2531 case SILC_PACKET_REJECT:
2532 if (packet->flags & SILC_PACKET_FLAG_LIST)
2537 case SILC_PACKET_NOTIFY:
2539 * Received notify packet. Server can receive notify packets from
2540 * router. Server then relays the notify messages to clients if needed.
2542 if (packet->flags & SILC_PACKET_FLAG_LIST)
2543 silc_server_notify_list(server, sock, packet);
2545 silc_server_notify(server, sock, packet);
2551 case SILC_PACKET_CHANNEL_MESSAGE:
2553 * Received channel message. Channel messages are special packets
2554 * (although probably most common ones) thus they are handled
2557 if (packet->flags & SILC_PACKET_FLAG_LIST)
2559 idata->last_receive = time(NULL);
2560 silc_server_channel_message(server, sock, packet);
2563 case SILC_PACKET_CHANNEL_KEY:
2565 * Received key for channel. As channels are created by the router
2566 * the keys are as well. We will distribute the key to all of our
2567 * locally connected clients on the particular channel. Router
2568 * never receives this channel and thus is ignored.
2570 if (packet->flags & SILC_PACKET_FLAG_LIST)
2572 silc_server_channel_key(server, sock, packet);
2578 case SILC_PACKET_COMMAND:
2580 * Recived command. Processes the command request and allocates the
2581 * command context and calls the command.
2583 if (packet->flags & SILC_PACKET_FLAG_LIST)
2585 silc_server_command_process(server, sock, packet);
2588 case SILC_PACKET_COMMAND_REPLY:
2590 * Received command reply packet. Received command reply to command. It
2591 * may be reply to command sent by us or reply to command sent by client
2592 * that we've routed further.
2594 if (packet->flags & SILC_PACKET_FLAG_LIST)
2596 silc_server_command_reply(server, sock, packet);
2600 * Private Message packets
2602 case SILC_PACKET_PRIVATE_MESSAGE:
2604 * Received private message packet. The packet is coming from either
2607 if (packet->flags & SILC_PACKET_FLAG_LIST)
2609 idata->last_receive = time(NULL);
2610 silc_server_private_message(server, sock, packet);
2613 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2615 * Private message key packet.
2617 if (packet->flags & SILC_PACKET_FLAG_LIST)
2619 silc_server_private_message_key(server, sock, packet);
2623 * Key Exchange protocol packets
2625 case SILC_PACKET_KEY_EXCHANGE:
2626 if (packet->flags & SILC_PACKET_FLAG_LIST)
2629 if (sock->protocol && sock->protocol->protocol &&
2630 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2631 SilcServerKEInternalContext *proto_ctx =
2632 (SilcServerKEInternalContext *)sock->protocol->context;
2634 proto_ctx->packet = silc_packet_context_dup(packet);
2636 /* Let the protocol handle the packet */
2637 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2639 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2640 "protocol active, packet dropped."));
2644 case SILC_PACKET_KEY_EXCHANGE_1:
2645 if (packet->flags & SILC_PACKET_FLAG_LIST)
2648 if (sock->protocol && sock->protocol->protocol &&
2649 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2650 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2652 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2653 SilcServerRekeyInternalContext *proto_ctx =
2654 (SilcServerRekeyInternalContext *)sock->protocol->context;
2656 if (proto_ctx->packet)
2657 silc_packet_context_free(proto_ctx->packet);
2659 proto_ctx->packet = silc_packet_context_dup(packet);
2661 /* Let the protocol handle the packet */
2662 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2664 SilcServerKEInternalContext *proto_ctx =
2665 (SilcServerKEInternalContext *)sock->protocol->context;
2667 if (proto_ctx->packet)
2668 silc_packet_context_free(proto_ctx->packet);
2670 proto_ctx->packet = silc_packet_context_dup(packet);
2671 proto_ctx->dest_id_type = packet->src_id_type;
2672 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2673 packet->src_id_type);
2674 if (!proto_ctx->dest_id)
2677 /* Let the protocol handle the packet */
2678 silc_protocol_execute(sock->protocol, server->schedule,
2682 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2683 "protocol active, packet dropped."));
2687 case SILC_PACKET_KEY_EXCHANGE_2:
2688 if (packet->flags & SILC_PACKET_FLAG_LIST)
2691 if (sock->protocol && sock->protocol->protocol &&
2692 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2693 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2695 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2696 SilcServerRekeyInternalContext *proto_ctx =
2697 (SilcServerRekeyInternalContext *)sock->protocol->context;
2699 if (proto_ctx->packet)
2700 silc_packet_context_free(proto_ctx->packet);
2702 proto_ctx->packet = silc_packet_context_dup(packet);
2704 /* Let the protocol handle the packet */
2705 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2707 SilcServerKEInternalContext *proto_ctx =
2708 (SilcServerKEInternalContext *)sock->protocol->context;
2710 if (proto_ctx->packet)
2711 silc_packet_context_free(proto_ctx->packet);
2713 proto_ctx->packet = silc_packet_context_dup(packet);
2714 proto_ctx->dest_id_type = packet->src_id_type;
2715 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2716 packet->src_id_type);
2717 if (!proto_ctx->dest_id)
2720 /* Let the protocol handle the packet */
2721 silc_protocol_execute(sock->protocol, server->schedule,
2725 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2726 "protocol active, packet dropped."));
2730 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2732 * Connection authentication request packet. When we receive this packet
2733 * we will send to the other end information about our mandatory
2734 * authentication method for the connection. This packet maybe received
2737 if (packet->flags & SILC_PACKET_FLAG_LIST)
2739 silc_server_connection_auth_request(server, sock, packet);
2743 * Connection Authentication protocol packets
2745 case SILC_PACKET_CONNECTION_AUTH:
2746 /* Start of the authentication protocol. We receive here the
2747 authentication data and will verify it. */
2748 if (packet->flags & SILC_PACKET_FLAG_LIST)
2751 if (sock->protocol && sock->protocol->protocol->type
2752 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2754 SilcServerConnAuthInternalContext *proto_ctx =
2755 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2757 proto_ctx->packet = silc_packet_context_dup(packet);
2759 /* Let the protocol handle the packet */
2760 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2762 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2763 "protocol active, packet dropped."));
2767 case SILC_PACKET_NEW_ID:
2769 * Received New ID packet. This includes some new ID that has been
2770 * created. It may be for client, server or channel. This is the way
2771 * to distribute information about new registered entities in the
2774 if (packet->flags & SILC_PACKET_FLAG_LIST)
2775 silc_server_new_id_list(server, sock, packet);
2777 silc_server_new_id(server, sock, packet);
2780 case SILC_PACKET_NEW_CLIENT:
2782 * Received new client packet. This includes client information that
2783 * we will use to create initial client ID. After creating new
2784 * ID we will send it to the client.
2786 if (packet->flags & SILC_PACKET_FLAG_LIST)
2788 silc_server_new_client(server, sock, packet);
2791 case SILC_PACKET_NEW_SERVER:
2793 * Received new server packet. This includes Server ID and some other
2794 * information that we may save. This is received after server has
2797 if (packet->flags & SILC_PACKET_FLAG_LIST)
2799 silc_server_new_server(server, sock, packet);
2802 case SILC_PACKET_NEW_CHANNEL:
2804 * Received new channel packet. Information about new channel in the
2805 * network are distributed using this packet.
2807 if (packet->flags & SILC_PACKET_FLAG_LIST)
2808 silc_server_new_channel_list(server, sock, packet);
2810 silc_server_new_channel(server, sock, packet);
2813 case SILC_PACKET_HEARTBEAT:
2815 * Received heartbeat.
2817 if (packet->flags & SILC_PACKET_FLAG_LIST)
2821 case SILC_PACKET_KEY_AGREEMENT:
2823 * Received heartbeat.
2825 if (packet->flags & SILC_PACKET_FLAG_LIST)
2827 silc_server_key_agreement(server, sock, packet);
2830 case SILC_PACKET_REKEY:
2832 * Received re-key packet. The sender wants to regenerate the session
2835 if (packet->flags & SILC_PACKET_FLAG_LIST)
2837 silc_server_rekey(server, sock, packet);
2840 case SILC_PACKET_REKEY_DONE:
2842 * The re-key is done.
2844 if (packet->flags & SILC_PACKET_FLAG_LIST)
2847 if (sock->protocol && sock->protocol->protocol &&
2848 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2850 SilcServerRekeyInternalContext *proto_ctx =
2851 (SilcServerRekeyInternalContext *)sock->protocol->context;
2853 if (proto_ctx->packet)
2854 silc_packet_context_free(proto_ctx->packet);
2856 proto_ctx->packet = silc_packet_context_dup(packet);
2858 /* Let the protocol handle the packet */
2859 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2861 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2862 "protocol active, packet dropped."));
2866 case SILC_PACKET_FTP:
2868 if (packet->flags & SILC_PACKET_FLAG_LIST)
2870 silc_server_ftp(server, sock, packet);
2873 case SILC_PACKET_RESUME_CLIENT:
2875 if (packet->flags & SILC_PACKET_FLAG_LIST)
2877 silc_server_resume_client(server, sock, packet);
2880 case SILC_PACKET_RESUME_ROUTER:
2881 /* Resume router packet received. This packet is received for backup
2882 router resuming protocol. */
2883 if (packet->flags & SILC_PACKET_FLAG_LIST)
2885 silc_server_backup_resume_router(server, sock, packet);
2889 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2894 /* Creates connection to a remote router. */
2896 void silc_server_create_connection(SilcServer server,
2897 const char *remote_host, SilcUInt32 port)
2899 SilcServerConnection sconn;
2901 /* Allocate connection object for hold connection specific stuff. */
2902 sconn = silc_calloc(1, sizeof(*sconn));
2903 sconn->remote_host = strdup(remote_host);
2904 sconn->remote_port = port;
2905 sconn->no_reconnect = TRUE;
2907 silc_schedule_task_add(server->schedule, 0,
2908 silc_server_connect_router,
2909 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2910 SILC_TASK_PRI_NORMAL);
2913 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2915 silc_socket_free(context);
2918 /* Closes connection to socket connection */
2920 void silc_server_close_connection(SilcServer server,
2921 SilcSocketConnection sock)
2925 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2926 silc_schedule_task_add(server->schedule, 0,
2927 silc_server_close_connection_final,
2928 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2929 SILC_TASK_PRI_NORMAL);
2933 memset(tmp, 0, sizeof(tmp));
2934 silc_socket_get_error(sock, tmp, sizeof(tmp));
2935 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2937 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2938 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2939 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2940 "Router"), tmp[0] ? tmp : ""));
2942 /* We won't listen for this connection anymore */
2943 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2945 /* Unregister all tasks */
2946 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2948 /* Close the actual connection */
2949 silc_net_close_connection(sock->sock);
2950 server->sockets[sock->sock] = NULL;
2952 /* If sock->user_data is NULL then we'll check for active protocols
2953 here since the silc_server_free_sock_user_data has not been called
2954 for this connection. */
2955 if (!sock->user_data) {
2956 /* If any protocol is active cancel its execution. It will call
2957 the final callback which will finalize the disconnection. */
2958 if (sock->protocol) {
2959 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2960 silc_protocol_cancel(sock->protocol, server->schedule);
2961 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2962 silc_protocol_execute_final(sock->protocol, server->schedule);
2963 sock->protocol = NULL;
2968 silc_schedule_task_add(server->schedule, 0,
2969 silc_server_close_connection_final,
2970 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2971 SILC_TASK_PRI_NORMAL);
2974 /* Sends disconnect message to remote connection and disconnects the
2977 void silc_server_disconnect_remote(SilcServer server,
2978 SilcSocketConnection sock,
2979 SilcStatus status, ...)
2982 unsigned char buf[512];
2987 if (!sock || SILC_IS_DISCONNECTED(sock))
2990 memset(buf, 0, sizeof(buf));
2991 va_start(ap, status);
2992 cp = va_arg(ap, char *);
2994 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2999 SILC_LOG_DEBUG(("Disconnecting remote host"));
3001 /* Notify remote end that the conversation is over. The notify message
3002 is tried to be sent immediately. */
3006 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3008 buffer = silc_buffer_alloc_size(len);
3012 buffer->data[0] = status;
3014 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3016 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3017 buffer->data, buffer->len, TRUE);
3018 silc_buffer_free(buffer);
3021 silc_server_packet_queue_purge(server, sock);
3023 /* Mark the connection to be disconnected */
3024 SILC_SET_DISCONNECTED(sock);
3025 silc_server_close_connection(server, sock);
3028 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3030 SilcServer server = app_context;
3031 SilcClientEntry client = context;
3033 assert(!silc_hash_table_count(client->channels));
3035 silc_idlist_del_data(client);
3036 silc_idcache_purge_by_context(server->local_list->clients, client);
3039 /* Frees client data and notifies about client's signoff. */
3041 void silc_server_free_client_data(SilcServer server,
3042 SilcSocketConnection sock,
3043 SilcClientEntry client,
3045 const char *signoff)
3047 SILC_LOG_DEBUG(("Freeing client data"));
3049 /* If there is pending outgoing data for the client then purge it
3050 to the network before removing the client entry. */
3051 silc_server_packet_queue_purge(server, sock);
3054 /* Check if anyone is watching this nickname */
3055 if (server->server_type == SILC_ROUTER)
3056 silc_server_check_watcher_list(server, client, NULL,
3057 SILC_NOTIFY_TYPE_SIGNOFF);
3059 /* Send SIGNOFF notify to routers. */
3061 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3062 SILC_BROADCAST(server), client->id,
3066 /* Remove client from all channels */
3068 silc_server_remove_from_channels(server, NULL, client,
3069 TRUE, (char *)signoff, TRUE);
3071 silc_server_remove_from_channels(server, NULL, client,
3072 FALSE, NULL, FALSE);
3074 /* Remove this client from watcher list if it is */
3075 silc_server_del_from_watcher_list(server, client);
3077 /* Update statistics */
3078 server->stat.my_clients--;
3079 server->stat.clients--;
3080 if (server->stat.cell_clients)
3081 server->stat.cell_clients--;
3082 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3083 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3084 silc_schedule_task_del_by_context(server->schedule, client);
3086 /* We will not delete the client entry right away. We will take it
3087 into history (for WHOWAS command) for 5 minutes, unless we're
3088 shutting down server. */
3089 if (!server->server_shutdown) {
3090 silc_schedule_task_add(server->schedule, 0,
3091 silc_server_free_client_data_timeout,
3093 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3094 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3095 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3097 client->router = NULL;
3098 client->connection = NULL;
3100 /* Delete directly since we're shutting down server */
3101 silc_idlist_del_data(client);
3102 silc_idlist_del_client(server->local_list, client);
3106 /* Frees user_data pointer from socket connection object. This also sends
3107 appropriate notify packets to the network to inform about leaving
3110 void silc_server_free_sock_user_data(SilcServer server,
3111 SilcSocketConnection sock,
3112 const char *signoff_message)
3114 switch (sock->type) {
3115 case SILC_SOCKET_TYPE_CLIENT:
3117 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3118 silc_server_free_client_data(server, sock, user_data, TRUE,
3122 case SILC_SOCKET_TYPE_SERVER:
3123 case SILC_SOCKET_TYPE_ROUTER:
3125 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3126 SilcServerEntry backup_router = NULL;
3128 SILC_LOG_DEBUG(("Freeing server data"));
3131 backup_router = silc_server_backup_get(server, user_data->id);
3133 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3134 backup_router == server->id_entry &&
3135 sock->type != SILC_SOCKET_TYPE_ROUTER)
3136 backup_router = NULL;
3138 if (server->server_shutdown || server->backup_noswitch)
3139 backup_router = NULL;
3141 /* If this was our primary router connection then we're lost to
3142 the outside world. */
3143 if (server->router == user_data) {
3144 /* Check whether we have a backup router connection */
3145 if (!backup_router || backup_router == user_data) {
3146 silc_schedule_task_add(server->schedule, 0,
3147 silc_server_connect_to_router,
3150 SILC_TASK_PRI_NORMAL);
3152 server->id_entry->router = NULL;
3153 server->router = NULL;
3154 server->standalone = TRUE;
3155 backup_router = NULL;
3157 if (server->id_entry != backup_router) {
3158 SILC_LOG_INFO(("New primary router is backup router %s",
3159 backup_router->server_name));
3160 server->id_entry->router = backup_router;
3161 server->router = backup_router;
3162 server->router_connect = time(0);
3163 server->backup_primary = TRUE;
3165 SILC_LOG_INFO(("We are now new primary router in this cell"));
3166 server->id_entry->router = NULL;
3167 server->router = NULL;
3168 server->standalone = TRUE;
3170 /* We stop here to take a breath */
3174 if (server->server_type == SILC_BACKUP_ROUTER) {
3175 server->server_type = SILC_ROUTER;
3177 /* We'll need to constantly try to reconnect to the primary
3178 router so that we'll see when it comes back online. */
3179 silc_server_backup_reconnect(server, sock->ip, sock->port,
3180 silc_server_backup_connected,
3184 /* Mark this connection as replaced */
3185 silc_server_backup_replaced_add(server, user_data->id,
3188 } else if (backup_router) {
3189 SILC_LOG_INFO(("Enabling the use of backup router %s",
3190 backup_router->server_name));
3191 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3192 backup_router->server_name));
3194 /* Mark this connection as replaced */
3195 silc_server_backup_replaced_add(server, user_data->id,
3197 } else if (server->server_type == SILC_SERVER &&
3198 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3199 /* Reconnect to the router (backup) */
3200 silc_schedule_task_add(server->schedule, 0,
3201 silc_server_connect_to_router,
3204 SILC_TASK_PRI_NORMAL);
3207 if (!backup_router) {
3208 /* Remove all servers that are originated from this server, and
3209 remove the clients of those servers too. */
3210 silc_server_remove_servers_by_server(server, user_data, TRUE);
3212 /* Remove the clients that this server owns as they will become
3213 invalid now too. For backup router the server is actually
3214 coming from the primary router, so mark that as the owner
3216 if (server->server_type == SILC_BACKUP_ROUTER &&
3217 sock->type == SILC_SOCKET_TYPE_SERVER)
3218 silc_server_remove_clients_by_server(server, server->router,
3221 silc_server_remove_clients_by_server(server, user_data,
3224 /* Remove channels owned by this server */
3225 if (server->server_type == SILC_SERVER)
3226 silc_server_remove_channels_by_server(server, user_data);
3228 /* Enable local server connections that may be disabled */
3229 silc_server_local_servers_toggle_enabled(server, TRUE);
3231 /* Update the client entries of this server to the new backup
3232 router. If we are the backup router we also resolve the real
3233 servers for the clients. After updating is over this also
3234 removes the clients that this server explicitly owns. */
3235 silc_server_update_clients_by_server(server, user_data,
3236 backup_router, TRUE);
3238 /* If we are router and just lost our primary router (now standlaone)
3239 we remove everything that was behind it, since we don't know
3241 if (server->server_type == SILC_ROUTER && server->standalone)
3242 /* Remove all servers that are originated from this server, and
3243 remove the clients of those servers too. */
3244 silc_server_remove_servers_by_server(server, user_data, TRUE);
3246 /* Finally remove the clients that are explicitly owned by this
3247 server. They go down with the server. */
3248 silc_server_remove_clients_by_server(server, user_data,
3251 /* Update our server cache to use the new backup router too. */
3252 silc_server_update_servers_by_server(server, user_data, backup_router);
3253 if (server->server_type == SILC_SERVER)
3254 silc_server_update_channels_by_server(server, user_data,
3257 /* Send notify about primary router going down to local operators */
3258 if (server->backup_router)
3259 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3260 SILC_NOTIFY_TYPE_NONE,
3261 ("%s switched to backup router %s "
3262 "(we are primary router now)",
3263 server->server_name, server->server_name));
3264 else if (server->router)
3265 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3266 SILC_NOTIFY_TYPE_NONE,
3267 ("%s switched to backup router %s",
3268 server->server_name,
3269 server->router->server_name));
3271 server->backup_noswitch = FALSE;
3273 /* Free the server entry */
3274 silc_server_backup_del(server, user_data);
3275 silc_server_backup_replaced_del(server, user_data);
3276 silc_idlist_del_data(user_data);
3277 if (!silc_idlist_del_server(server->local_list, user_data))
3278 silc_idlist_del_server(server->global_list, user_data);
3279 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3280 server->stat.my_servers--;
3282 server->stat.my_routers--;
3283 server->stat.routers--;
3285 server->stat.servers--;
3286 if (server->server_type == SILC_ROUTER)
3287 server->stat.cell_servers--;
3289 if (backup_router && backup_router != server->id_entry) {
3290 /* Announce all of our stuff that was created about 5 minutes ago.
3291 The backup router knows all the other stuff already. */
3292 if (server->server_type == SILC_ROUTER)
3293 silc_server_announce_servers(server, FALSE, time(0) - 300,
3294 backup_router->connection);
3296 /* Announce our clients and channels to the router */
3297 silc_server_announce_clients(server, time(0) - 300,
3298 backup_router->connection);
3299 silc_server_announce_channels(server, time(0) - 300,
3300 backup_router->connection);
3306 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3308 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3310 silc_idlist_del_data(user_data);
3311 silc_free(user_data);
3316 /* If any protocol is active cancel its execution */
3317 if (sock->protocol) {
3318 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3319 silc_protocol_cancel(sock->protocol, server->schedule);
3320 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3321 silc_protocol_execute_final(sock->protocol, server->schedule);
3322 sock->protocol = NULL;
3325 sock->user_data = NULL;
3328 /* Removes client from all channels it has joined. This is used when client
3329 connection is disconnected. If the client on a channel is last, the
3330 channel is removed as well. This sends the SIGNOFF notify types. */
3332 void silc_server_remove_from_channels(SilcServer server,
3333 SilcSocketConnection sock,
3334 SilcClientEntry client,
3336 const char *signoff_message,
3339 SilcChannelEntry channel;
3340 SilcChannelClientEntry chl;
3341 SilcHashTableList htl;
3342 SilcBuffer clidp = NULL;
3347 SILC_LOG_DEBUG(("Removing client from joined channels"));
3349 if (notify && !client->id)
3353 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3358 /* Remove the client from all channels. The client is removed from
3359 the channels' user list. */
3360 silc_hash_table_list(client->channels, &htl);
3361 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3362 channel = chl->channel;
3364 /* Remove channel if this is last client leaving the channel, unless
3365 the channel is permanent. */
3366 if (server->server_type != SILC_SERVER &&
3367 silc_hash_table_count(channel->user_list) < 2) {
3368 silc_server_channel_delete(server, channel);
3372 silc_hash_table_del(client->channels, channel);
3373 silc_hash_table_del(channel->user_list, client);
3374 channel->user_count--;
3376 /* If there is no global users on the channel anymore mark the channel
3377 as local channel. Do not check if the removed client is local client. */
3378 if (server->server_type == SILC_SERVER && channel->global_users &&
3379 chl->client->router && !silc_server_channel_has_global(channel))
3380 channel->global_users = FALSE;
3382 memset(chl, 'A', sizeof(*chl));
3385 /* Update statistics */
3386 if (SILC_IS_LOCAL(client))
3387 server->stat.my_chanclients--;
3388 if (server->server_type == SILC_ROUTER) {
3389 server->stat.cell_chanclients--;
3390 server->stat.chanclients--;
3393 /* If there is not at least one local user on the channel then we don't
3394 need the channel entry anymore, we can remove it safely, unless the
3395 channel is permanent channel */
3396 if (server->server_type == SILC_SERVER &&
3397 !silc_server_channel_has_local(channel)) {
3398 /* Notify about leaving client if this channel has global users. */
3399 if (notify && channel->global_users)
3400 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3401 SILC_NOTIFY_TYPE_SIGNOFF,
3402 signoff_message ? 2 : 1,
3403 clidp->data, clidp->len,
3404 signoff_message, signoff_message ?
3405 strlen(signoff_message) : 0);
3407 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3408 silc_server_channel_delete(server, channel);
3412 /* Send notify to channel about client leaving SILC and channel too */
3414 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3415 SILC_NOTIFY_TYPE_SIGNOFF,
3416 signoff_message ? 2 : 1,
3417 clidp->data, clidp->len,
3418 signoff_message, signoff_message ?
3419 strlen(signoff_message) : 0);
3421 /* Don't create keys if we are shutting down */
3422 if (server->server_shutdown)
3425 /* Re-generate channel key if needed */
3426 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3427 if (!silc_server_create_channel_key(server, channel, 0))
3430 /* Send the channel key to the channel. The key of course is not sent
3431 to the client who was removed from the channel. */
3432 silc_server_send_channel_key(server, client->connection, channel,
3433 server->server_type == SILC_ROUTER ?
3434 FALSE : !server->standalone);
3438 silc_hash_table_list_reset(&htl);
3440 silc_buffer_free(clidp);
3443 /* Removes client from one channel. This is used for example when client
3444 calls LEAVE command to remove itself from the channel. Returns TRUE
3445 if channel still exists and FALSE if the channel is removed when
3446 last client leaves the channel. If `notify' is FALSE notify messages
3449 bool silc_server_remove_from_one_channel(SilcServer server,
3450 SilcSocketConnection sock,
3451 SilcChannelEntry channel,
3452 SilcClientEntry client,
3455 SilcChannelClientEntry chl;
3458 SILC_LOG_DEBUG(("Removing %s from channel %s",
3459 silc_id_render(client->id, SILC_ID_CLIENT),
3460 channel->channel_name));
3462 /* Get the entry to the channel, if this client is not on the channel
3464 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3467 /* Remove channel if this is last client leaving the channel, unless
3468 the channel is permanent. */
3469 if (server->server_type != SILC_SERVER &&
3470 silc_hash_table_count(channel->user_list) < 2) {
3471 silc_server_channel_delete(server, channel);
3475 silc_hash_table_del(client->channels, channel);
3476 silc_hash_table_del(channel->user_list, client);
3477 channel->user_count--;
3479 /* If there is no global users on the channel anymore mark the channel
3480 as local channel. Do not check if the client is local client. */
3481 if (server->server_type == SILC_SERVER && channel->global_users &&
3482 chl->client->router && !silc_server_channel_has_global(channel))
3483 channel->global_users = FALSE;
3485 memset(chl, 'O', sizeof(*chl));
3488 /* Update statistics */
3489 if (SILC_IS_LOCAL(client))
3490 server->stat.my_chanclients--;
3491 if (server->server_type == SILC_ROUTER) {
3492 server->stat.cell_chanclients--;
3493 server->stat.chanclients--;
3496 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3500 /* If there is not at least one local user on the channel then we don't
3501 need the channel entry anymore, we can remove it safely, unless the
3502 channel is permanent channel */
3503 if (server->server_type == SILC_SERVER &&
3504 !silc_server_channel_has_local(channel)) {
3505 /* Notify about leaving client if this channel has global users. */
3506 if (notify && channel->global_users)
3507 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3508 SILC_NOTIFY_TYPE_LEAVE, 1,
3509 clidp->data, clidp->len);
3511 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3512 silc_server_channel_delete(server, channel);
3513 silc_buffer_free(clidp);
3517 /* Send notify to channel about client leaving the channel */
3519 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3520 SILC_NOTIFY_TYPE_LEAVE, 1,
3521 clidp->data, clidp->len);
3523 silc_buffer_free(clidp);
3527 /* Timeout callback. This is called if connection is idle or for some
3528 other reason is not responding within some period of time. This
3529 disconnects the remote end. */
3531 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3533 SilcServer server = (SilcServer)context;
3534 SilcSocketConnection sock = server->sockets[fd];
3535 SilcProtocolType protocol = 0;
3537 SILC_LOG_DEBUG(("Start"));
3542 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3543 sock->hostname, sock->ip));
3545 /* If we have protocol active we must assure that we call the protocol's
3546 final callback so that all the memory is freed. */
3547 if (sock->protocol) {
3548 protocol = sock->protocol->protocol->type;
3549 silc_protocol_cancel(sock->protocol, server->schedule);
3550 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3551 silc_protocol_execute_final(sock->protocol, server->schedule);
3552 sock->protocol = NULL;
3556 silc_server_disconnect_remote(server, sock,
3558 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3559 SILC_STATUS_ERR_AUTH_FAILED :
3560 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3561 "Connection timeout");
3563 if (sock->user_data)
3564 silc_server_free_sock_user_data(server, sock, NULL);
3567 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3568 function may be used only by router. In real SILC network all channels
3569 are created by routers thus this function is never used by normal
3572 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3573 SilcServerID *router_id,
3579 SilcChannelID *channel_id;
3580 SilcChannelEntry entry;
3584 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3587 cipher = SILC_DEFAULT_CIPHER;
3589 hmac = SILC_DEFAULT_HMAC;
3591 /* Allocate cipher */
3592 if (!silc_cipher_alloc(cipher, &key))
3596 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3597 silc_cipher_free(key);
3601 channel_name = strdup(channel_name);
3603 /* Create the channel ID */
3604 if (!silc_id_create_channel_id(server, router_id, server->rng,
3606 silc_free(channel_name);
3607 silc_cipher_free(key);
3608 silc_hmac_free(newhmac);
3612 /* Create the channel */
3613 entry = silc_idlist_add_channel(server->local_list, channel_name,
3614 SILC_CHANNEL_MODE_NONE, channel_id,
3615 NULL, key, newhmac, 0);
3617 silc_free(channel_name);
3618 silc_cipher_free(key);
3619 silc_hmac_free(newhmac);
3620 silc_free(channel_id);
3624 entry->cipher = strdup(cipher);
3625 entry->hmac_name = strdup(hmac);
3627 /* Now create the actual key material */
3628 if (!silc_server_create_channel_key(server, entry,
3629 silc_cipher_get_key_len(key) / 8)) {
3630 silc_idlist_del_channel(server->local_list, entry);
3634 /* Notify other routers about the new channel. We send the packet
3635 to our primary route. */
3637 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3638 channel_name, entry->id,
3639 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3642 /* Distribute to backup routers */
3643 if (broadcast && server->server_type == SILC_ROUTER) {
3646 SilcUInt32 name_len = strlen(channel_name);
3647 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3648 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3650 packet = silc_channel_payload_encode(channel_name, name_len,
3651 cid, channel_id_len, entry->mode);
3652 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3653 packet->data, packet->len, FALSE, TRUE);
3655 silc_buffer_free(packet);
3658 server->stat.my_channels++;
3659 if (server->server_type == SILC_ROUTER) {
3660 server->stat.channels++;
3661 server->stat.cell_channels++;
3662 entry->users_resolved = TRUE;
3668 /* Same as above but creates the channel with Channel ID `channel_id. */
3671 silc_server_create_new_channel_with_id(SilcServer server,
3675 SilcChannelID *channel_id,
3678 SilcChannelEntry entry;
3682 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3685 cipher = SILC_DEFAULT_CIPHER;
3687 hmac = SILC_DEFAULT_HMAC;
3689 /* Allocate cipher */
3690 if (!silc_cipher_alloc(cipher, &key))
3694 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3695 silc_cipher_free(key);
3699 channel_name = strdup(channel_name);
3701 /* Create the channel */
3702 entry = silc_idlist_add_channel(server->local_list, channel_name,
3703 SILC_CHANNEL_MODE_NONE, channel_id,
3704 NULL, key, newhmac, 0);
3706 silc_cipher_free(key);
3707 silc_hmac_free(newhmac);
3708 silc_free(channel_name);
3712 /* Now create the actual key material */
3713 if (!silc_server_create_channel_key(server, entry,
3714 silc_cipher_get_key_len(key) / 8)) {
3715 silc_idlist_del_channel(server->local_list, entry);
3719 /* Notify other routers about the new channel. We send the packet
3720 to our primary route. */
3722 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3723 channel_name, entry->id,
3724 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3727 /* Distribute to backup routers */
3728 if (broadcast && server->server_type == SILC_ROUTER) {
3731 SilcUInt32 name_len = strlen(channel_name);
3732 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3733 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3735 packet = silc_channel_payload_encode(channel_name, name_len,
3736 cid, channel_id_len, entry->mode);
3737 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3738 packet->data, packet->len, FALSE, TRUE);
3740 silc_buffer_free(packet);
3743 server->stat.my_channels++;
3744 if (server->server_type == SILC_ROUTER) {
3745 server->stat.channels++;
3746 server->stat.cell_channels++;
3747 entry->users_resolved = TRUE;
3753 /* Channel's key re-key timeout callback. */
3755 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3757 SilcServer server = app_context;
3758 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3762 /* Return now if we are shutting down */
3763 if (server->server_shutdown)
3766 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3769 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3772 /* Generates new channel key. This is used to create the initial channel key
3773 but also to re-generate new key for channel. If `key_len' is provided
3774 it is the bytes of the key length. */
3776 bool silc_server_create_channel_key(SilcServer server,
3777 SilcChannelEntry channel,
3781 unsigned char channel_key[32], hash[32];
3784 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3785 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3789 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3791 if (!channel->channel_key)
3792 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3793 channel->channel_key = NULL;
3799 else if (channel->key_len)
3800 len = channel->key_len / 8;
3802 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3804 /* Create channel key */
3805 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3808 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3810 /* Remove old key if exists */
3812 memset(channel->key, 0, channel->key_len / 8);
3813 silc_free(channel->key);
3817 channel->key_len = len * 8;
3818 channel->key = silc_memdup(channel_key, len);
3819 memset(channel_key, 0, sizeof(channel_key));
3821 /* Generate HMAC key from the channel key data and set it */
3823 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3824 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3825 silc_hmac_set_key(channel->hmac, hash,
3826 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3827 memset(hash, 0, sizeof(hash));
3829 if (server->server_type == SILC_ROUTER) {
3830 if (!channel->rekey)
3831 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3832 channel->rekey->channel = channel;
3833 channel->rekey->key_len = key_len;
3834 if (channel->rekey->task)
3835 silc_schedule_task_del(server->schedule, channel->rekey->task);
3837 channel->rekey->task =
3838 silc_schedule_task_add(server->schedule, 0,
3839 silc_server_channel_key_rekey,
3840 (void *)channel->rekey,
3841 server->config->channel_rekey_secs, 0,
3843 SILC_TASK_PRI_NORMAL);
3849 /* Saves the channel key found in the encoded `key_payload' buffer. This
3850 function is used when we receive Channel Key Payload and also when we're
3851 processing JOIN command reply. Returns entry to the channel. */
3853 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3854 SilcBuffer key_payload,
3855 SilcChannelEntry channel)
3857 SilcChannelKeyPayload payload = NULL;
3858 SilcChannelID *id = NULL;
3859 unsigned char *tmp, hash[32];
3863 /* Decode channel key payload */
3864 payload = silc_channel_key_payload_parse(key_payload->data,
3867 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3872 /* Get the channel entry */
3875 /* Get channel ID */
3876 tmp = silc_channel_key_get_id(payload, &tmp_len);
3877 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3883 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3885 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3887 if (server->server_type == SILC_ROUTER)
3888 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3889 silc_id_render(id, SILC_ID_CHANNEL)));
3895 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3897 tmp = silc_channel_key_get_key(payload, &tmp_len);
3903 cipher = silc_channel_key_get_cipher(payload, NULL);
3909 /* Remove old key if exists */
3911 memset(channel->key, 0, channel->key_len / 8);
3912 silc_free(channel->key);
3913 silc_cipher_free(channel->channel_key);
3916 /* Create new cipher */
3917 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3918 channel->channel_key = NULL;
3923 if (channel->cipher)
3924 silc_free(channel->cipher);
3925 channel->cipher = strdup(cipher);
3928 channel->key_len = tmp_len * 8;
3929 channel->key = silc_memdup(tmp, tmp_len);
3930 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3932 /* Generate HMAC key from the channel key data and set it */
3934 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3935 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3936 silc_hmac_set_key(channel->hmac, hash,
3937 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3939 memset(hash, 0, sizeof(hash));
3940 memset(tmp, 0, tmp_len);
3942 if (server->server_type == SILC_ROUTER) {
3943 if (!channel->rekey)
3944 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3945 channel->rekey->channel = channel;
3946 if (channel->rekey->task)
3947 silc_schedule_task_del(server->schedule, channel->rekey->task);
3949 channel->rekey->task =
3950 silc_schedule_task_add(server->schedule, 0,
3951 silc_server_channel_key_rekey,
3952 (void *)channel->rekey,
3953 server->config->channel_rekey_secs, 0,
3955 SILC_TASK_PRI_NORMAL);
3961 silc_channel_key_payload_free(payload);
3966 /* Heartbeat callback. This function is set as argument for the
3967 silc_socket_set_heartbeat function. The library will call this function
3968 at the set time interval. */
3970 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3973 SilcServer server = hb_context;
3975 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3976 sock->port, sock->ip));
3978 /* Send the heartbeat */
3979 silc_server_send_heartbeat(server, sock);
3982 /* Returns assembled of all servers in the given ID list. The packet's
3983 form is dictated by the New ID payload. */
3985 static void silc_server_announce_get_servers(SilcServer server,
3986 SilcServerEntry remote,
3988 SilcBuffer *servers,
3989 unsigned long creation_time)
3991 SilcIDCacheList list;
3992 SilcIDCacheEntry id_cache;
3993 SilcServerEntry entry;
3996 /* Go through all clients in the list */
3997 if (silc_idcache_get_all(id_list->servers, &list)) {
3998 if (silc_idcache_list_first(list, &id_cache)) {
4000 entry = (SilcServerEntry)id_cache->context;
4002 /* Do not announce the one we've sending our announcements and
4003 do not announce ourself. Also check the creation time if it's
4005 if ((entry == remote) || (entry == server->id_entry) ||
4006 (creation_time && entry->data.created < creation_time)) {
4007 if (!silc_idcache_list_next(list, &id_cache))
4012 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4014 *servers = silc_buffer_realloc(*servers,
4016 (*servers)->truelen + idp->len :
4018 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4019 silc_buffer_put(*servers, idp->data, idp->len);
4020 silc_buffer_pull(*servers, idp->len);
4021 silc_buffer_free(idp);
4023 if (!silc_idcache_list_next(list, &id_cache))
4028 silc_idcache_list_free(list);
4033 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4039 p = silc_notify_payload_encode(notify, argc, ap);
4045 /* This function is used by router to announce existing servers to our
4046 primary router when we've connected to it. If `creation_time' is non-zero
4047 then only the servers that has been created after the `creation_time'
4048 will be announced. */
4050 void silc_server_announce_servers(SilcServer server, bool global,
4051 unsigned long creation_time,
4052 SilcSocketConnection remote)
4054 SilcBuffer servers = NULL;
4056 SILC_LOG_DEBUG(("Announcing servers"));
4058 /* Get servers in local list */
4059 silc_server_announce_get_servers(server, remote->user_data,
4060 server->local_list, &servers,
4064 /* Get servers in global list */
4065 silc_server_announce_get_servers(server, remote->user_data,
4066 server->global_list, &servers,
4070 silc_buffer_push(servers, servers->data - servers->head);
4071 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4073 /* Send the packet */
4074 silc_server_packet_send(server, remote,
4075 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4076 servers->data, servers->len, TRUE);
4078 silc_buffer_free(servers);
4082 /* Returns assembled packet of all clients in the given ID list. The
4083 packet's form is dictated by the New ID Payload. */
4085 static void silc_server_announce_get_clients(SilcServer server,
4087 SilcBuffer *clients,
4089 unsigned long creation_time)
4091 SilcIDCacheList list;
4092 SilcIDCacheEntry id_cache;
4093 SilcClientEntry client;
4096 unsigned char mode[4];
4098 /* Go through all clients in the list */
4099 if (silc_idcache_get_all(id_list->clients, &list)) {
4100 if (silc_idcache_list_first(list, &id_cache)) {
4102 client = (SilcClientEntry)id_cache->context;
4104 if (creation_time && client->data.created < creation_time) {
4105 if (!silc_idcache_list_next(list, &id_cache))
4109 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4110 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4111 if (!silc_idcache_list_next(list, &id_cache))
4116 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4118 *clients = silc_buffer_realloc(*clients,
4120 (*clients)->truelen + idp->len :
4122 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4123 silc_buffer_put(*clients, idp->data, idp->len);
4124 silc_buffer_pull(*clients, idp->len);
4126 SILC_PUT32_MSB(client->mode, mode);
4128 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4129 2, idp->data, idp->len,
4131 *umodes = silc_buffer_realloc(*umodes,
4133 (*umodes)->truelen + tmp->len :
4135 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4136 silc_buffer_put(*umodes, tmp->data, tmp->len);
4137 silc_buffer_pull(*umodes, tmp->len);
4138 silc_buffer_free(tmp);
4140 silc_buffer_free(idp);
4142 if (!silc_idcache_list_next(list, &id_cache))
4147 silc_idcache_list_free(list);
4151 /* This function is used to announce our existing clients to our router
4152 when we've connected to it. If `creation_time' is non-zero then only
4153 the clients that has been created after the `creation_time' will be
4156 void silc_server_announce_clients(SilcServer server,
4157 unsigned long creation_time,
4158 SilcSocketConnection remote)
4160 SilcBuffer clients = NULL;
4161 SilcBuffer umodes = NULL;
4163 SILC_LOG_DEBUG(("Announcing clients"));
4165 /* Get clients in local list */
4166 silc_server_announce_get_clients(server, server->local_list,
4167 &clients, &umodes, creation_time);
4169 /* As router we announce our global list as well */
4170 if (server->server_type == SILC_ROUTER)
4171 silc_server_announce_get_clients(server, server->global_list,
4172 &clients, &umodes, creation_time);
4175 silc_buffer_push(clients, clients->data - clients->head);
4176 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4178 /* Send the packet */
4179 silc_server_packet_send(server, remote,
4180 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4181 clients->data, clients->len, TRUE);
4183 silc_buffer_free(clients);
4187 silc_buffer_push(umodes, umodes->data - umodes->head);
4188 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4190 /* Send the packet */
4191 silc_server_packet_send(server, remote,
4192 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4193 umodes->data, umodes->len, TRUE);
4195 silc_buffer_free(umodes);
4199 /* Returns channel's topic for announcing it */
4201 void silc_server_announce_get_channel_topic(SilcServer server,
4202 SilcChannelEntry channel,
4207 if (channel->topic) {
4208 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4209 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4210 chidp->data, chidp->len,
4212 strlen(channel->topic));
4213 silc_buffer_free(chidp);
4217 /* Returns assembled packets for channel users of the `channel'. */
4219 void silc_server_announce_get_channel_users(SilcServer server,
4220 SilcChannelEntry channel,
4221 SilcBuffer *channel_modes,
4222 SilcBuffer *channel_users,
4223 SilcBuffer *channel_users_modes)
4225 SilcChannelClientEntry chl;
4226 SilcHashTableList htl;
4227 SilcBuffer chidp, clidp, csidp;
4230 unsigned char mode[4], *fkey = NULL;
4231 SilcUInt32 fkey_len = 0;
4234 SILC_LOG_DEBUG(("Start"));
4236 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4237 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4240 SILC_PUT32_MSB(channel->mode, mode);
4241 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4242 if (channel->founder_key)
4243 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4245 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4246 6, csidp->data, csidp->len,
4249 hmac, hmac ? strlen(hmac) : 0,
4250 channel->passphrase,
4251 channel->passphrase ?
4252 strlen(channel->passphrase) : 0,
4256 silc_buffer_realloc(*channel_modes,
4258 (*channel_modes)->truelen + len : len));
4259 silc_buffer_pull_tail(*channel_modes,
4260 ((*channel_modes)->end -
4261 (*channel_modes)->data));
4262 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4263 silc_buffer_pull(*channel_modes, len);
4264 silc_buffer_free(tmp);
4269 /* Now find all users on the channel */
4270 silc_hash_table_list(channel->user_list, &htl);
4271 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4272 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4275 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4276 clidp->data, clidp->len,
4277 chidp->data, chidp->len);
4280 silc_buffer_realloc(*channel_users,
4282 (*channel_users)->truelen + len : len));
4283 silc_buffer_pull_tail(*channel_users,
4284 ((*channel_users)->end -
4285 (*channel_users)->data));
4287 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4288 silc_buffer_pull(*channel_users, len);
4289 silc_buffer_free(tmp);
4291 /* CUMODE notify for mode change on the channel */
4292 SILC_PUT32_MSB(chl->mode, mode);
4293 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4294 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4295 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4296 4, csidp->data, csidp->len,
4298 clidp->data, clidp->len,
4301 *channel_users_modes =
4302 silc_buffer_realloc(*channel_users_modes,
4303 (*channel_users_modes ?
4304 (*channel_users_modes)->truelen + len : len));
4305 silc_buffer_pull_tail(*channel_users_modes,
4306 ((*channel_users_modes)->end -
4307 (*channel_users_modes)->data));
4309 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4310 silc_buffer_pull(*channel_users_modes, len);
4311 silc_buffer_free(tmp);
4315 silc_buffer_free(clidp);
4317 silc_hash_table_list_reset(&htl);
4318 silc_buffer_free(chidp);
4319 silc_buffer_free(csidp);
4322 /* Returns assembled packets for all channels and users on those channels
4323 from the given ID List. The packets are in the form dictated by the
4324 New Channel and New Channel User payloads. */
4326 void silc_server_announce_get_channels(SilcServer server,
4328 SilcBuffer *channels,
4329 SilcBuffer **channel_modes,
4330 SilcBuffer *channel_users,
4331 SilcBuffer **channel_users_modes,
4332 SilcUInt32 *channel_users_modes_c,
4333 SilcBuffer **channel_topics,
4334 SilcChannelID ***channel_ids,
4335 unsigned long creation_time)
4337 SilcIDCacheList list;
4338 SilcIDCacheEntry id_cache;
4339 SilcChannelEntry channel;
4342 SilcUInt16 name_len;
4344 int i = *channel_users_modes_c;
4347 SILC_LOG_DEBUG(("Start"));
4349 /* Go through all channels in the list */
4350 if (silc_idcache_get_all(id_list->channels, &list)) {
4351 if (silc_idcache_list_first(list, &id_cache)) {
4353 channel = (SilcChannelEntry)id_cache->context;
4355 if (creation_time && channel->created < creation_time)
4360 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4361 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4362 name_len = strlen(channel->channel_name);
4365 len = 4 + name_len + id_len + 4;
4367 silc_buffer_realloc(*channels,
4368 (*channels ? (*channels)->truelen +
4370 silc_buffer_pull_tail(*channels,
4371 ((*channels)->end - (*channels)->data));
4372 silc_buffer_format(*channels,
4373 SILC_STR_UI_SHORT(name_len),
4374 SILC_STR_UI_XNSTRING(channel->channel_name,
4376 SILC_STR_UI_SHORT(id_len),
4377 SILC_STR_UI_XNSTRING(cid, id_len),
4378 SILC_STR_UI_INT(channel->mode),
4380 silc_buffer_pull(*channels, len);
4383 if (creation_time && channel->updated < creation_time)
4389 /* Channel user modes */
4390 *channel_users_modes = silc_realloc(*channel_users_modes,
4391 sizeof(**channel_users_modes) *
4393 (*channel_users_modes)[i] = NULL;
4394 *channel_modes = silc_realloc(*channel_modes,
4395 sizeof(**channel_modes) * (i + 1));
4396 (*channel_modes)[i] = NULL;
4397 *channel_ids = silc_realloc(*channel_ids,
4398 sizeof(**channel_ids) * (i + 1));
4399 (*channel_ids)[i] = NULL;
4400 silc_server_announce_get_channel_users(server, channel,
4401 &(*channel_modes)[i],
4403 &(*channel_users_modes)[i]);
4404 (*channel_ids)[i] = channel->id;
4406 /* Channel's topic */
4407 *channel_topics = silc_realloc(*channel_topics,
4408 sizeof(**channel_topics) * (i + 1));
4409 (*channel_topics)[i] = NULL;
4410 silc_server_announce_get_channel_topic(server, channel,
4411 &(*channel_topics)[i]);
4412 (*channel_users_modes_c)++;
4416 if (!silc_idcache_list_next(list, &id_cache))
4421 silc_idcache_list_free(list);
4425 /* This function is used to announce our existing channels to our router
4426 when we've connected to it. This also announces the users on the
4427 channels to the router. If the `creation_time' is non-zero only the
4428 channels that was created after the `creation_time' are announced.
4429 Note that the channel users are still announced even if the `creation_time'
4432 void silc_server_announce_channels(SilcServer server,
4433 unsigned long creation_time,
4434 SilcSocketConnection remote)
4436 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4437 SilcBuffer *channel_users_modes = NULL;
4438 SilcBuffer *channel_topics = NULL;
4439 SilcUInt32 channel_users_modes_c = 0;
4440 SilcChannelID **channel_ids = NULL;
4442 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4444 /* Get channels and channel users in local list */
4445 silc_server_announce_get_channels(server, server->local_list,
4446 &channels, &channel_modes,
4448 &channel_users_modes,
4449 &channel_users_modes_c,
4451 &channel_ids, creation_time);
4453 /* Get channels and channel users in global list */
4454 if (server->server_type != SILC_SERVER)
4455 silc_server_announce_get_channels(server, server->global_list,
4456 &channels, &channel_modes,
4458 &channel_users_modes,
4459 &channel_users_modes_c,
4461 &channel_ids, creation_time);
4464 silc_buffer_push(channels, channels->data - channels->head);
4465 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4467 /* Send the packet */
4468 silc_server_packet_send(server, remote,
4469 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4470 channels->data, channels->len,
4473 silc_buffer_free(channels);
4476 if (channel_users) {
4477 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4478 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4479 channel_users->len);
4481 /* Send the packet */
4482 silc_server_packet_send(server, remote,
4483 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4484 channel_users->data, channel_users->len,
4487 silc_buffer_free(channel_users);
4490 if (channel_modes) {
4493 for (i = 0; i < channel_users_modes_c; i++) {
4494 if (!channel_modes[i])
4496 silc_buffer_push(channel_modes[i],
4497 channel_modes[i]->data -
4498 channel_modes[i]->head);
4499 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4500 channel_modes[i]->len);
4501 silc_server_packet_send_dest(server, remote,
4502 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4503 channel_ids[i], SILC_ID_CHANNEL,
4504 channel_modes[i]->data,
4505 channel_modes[i]->len,
4507 silc_buffer_free(channel_modes[i]);
4509 silc_free(channel_modes);
4512 if (channel_users_modes) {
4515 for (i = 0; i < channel_users_modes_c; i++) {
4516 if (!channel_users_modes[i])
4518 silc_buffer_push(channel_users_modes[i],
4519 channel_users_modes[i]->data -
4520 channel_users_modes[i]->head);
4521 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4522 channel_users_modes[i]->len);
4523 silc_server_packet_send_dest(server, remote,
4524 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4525 channel_ids[i], SILC_ID_CHANNEL,
4526 channel_users_modes[i]->data,
4527 channel_users_modes[i]->len,
4529 silc_buffer_free(channel_users_modes[i]);
4531 silc_free(channel_users_modes);
4534 if (channel_topics) {
4537 for (i = 0; i < channel_users_modes_c; i++) {
4538 if (!channel_topics[i])
4541 silc_buffer_push(channel_topics[i],
4542 channel_topics[i]->data -
4543 channel_topics[i]->head);
4544 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4545 channel_topics[i]->len);
4546 silc_server_packet_send_dest(server, remote,
4547 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4548 channel_ids[i], SILC_ID_CHANNEL,
4549 channel_topics[i]->data,
4550 channel_topics[i]->len,
4552 silc_buffer_free(channel_topics[i]);
4554 silc_free(channel_topics);
4557 silc_free(channel_ids);
4560 /* Failure timeout callback. If this is called then we will immediately
4561 process the received failure. We always process the failure with timeout
4562 since we do not want to blindly trust to received failure packets.
4563 This won't be called (the timeout is cancelled) if the failure was
4564 bogus (it is bogus if remote does not close the connection after sending
4567 SILC_TASK_CALLBACK(silc_server_failure_callback)
4569 SilcServer server = app_context;
4570 SilcServerFailureContext f = (SilcServerFailureContext)context;
4572 if (f->sock->protocol) {
4573 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4574 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4577 silc_socket_free(f->sock);
4581 /* Assembles user list and users mode list from the `channel'. */
4583 bool silc_server_get_users_on_channel(SilcServer server,
4584 SilcChannelEntry channel,
4585 SilcBuffer *user_list,
4586 SilcBuffer *mode_list,
4587 SilcUInt32 *user_count)
4589 SilcChannelClientEntry chl;
4590 SilcHashTableList htl;
4591 SilcBuffer client_id_list;
4592 SilcBuffer client_mode_list;
4594 SilcUInt32 list_count = 0, len = 0;
4596 if (!silc_hash_table_count(channel->user_list))
4599 silc_hash_table_list(channel->user_list, &htl);
4600 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4601 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4602 silc_hash_table_list_reset(&htl);
4604 client_id_list = silc_buffer_alloc(len);
4606 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4607 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4608 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4610 silc_hash_table_list(channel->user_list, &htl);
4611 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4613 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4614 silc_buffer_put(client_id_list, idp->data, idp->len);
4615 silc_buffer_pull(client_id_list, idp->len);
4616 silc_buffer_free(idp);
4618 /* Client's mode on channel */
4619 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4620 silc_buffer_pull(client_mode_list, 4);
4624 silc_hash_table_list_reset(&htl);
4625 silc_buffer_push(client_id_list,
4626 client_id_list->data - client_id_list->head);
4627 silc_buffer_push(client_mode_list,
4628 client_mode_list->data - client_mode_list->head);
4630 *user_list = client_id_list;
4631 *mode_list = client_mode_list;
4632 *user_count = list_count;
4636 /* Saves users and their modes to the `channel'. */
4638 void silc_server_save_users_on_channel(SilcServer server,
4639 SilcSocketConnection sock,
4640 SilcChannelEntry channel,
4641 SilcClientID *noadd,
4642 SilcBuffer user_list,
4643 SilcBuffer mode_list,
4644 SilcUInt32 user_count)
4649 SilcClientID *client_id;
4650 SilcClientEntry client;
4651 SilcIDCacheEntry cache;
4652 SilcChannelClientEntry chl;
4654 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4655 channel->channel_name));
4657 for (i = 0; i < user_count; i++) {
4659 SILC_GET16_MSB(idp_len, user_list->data + 2);
4661 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4662 silc_buffer_pull(user_list, idp_len);
4667 SILC_GET32_MSB(mode, mode_list->data);
4668 silc_buffer_pull(mode_list, 4);
4670 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4671 silc_free(client_id);
4677 /* Check if we have this client cached already. */
4678 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4679 server->server_type, &cache);
4681 client = silc_idlist_find_client_by_id(server->global_list,
4682 client_id, server->server_type,
4685 /* If router did not find such Client ID in its lists then this must
4686 be bogus client or some router in the net is buggy. */
4687 if (server->server_type != SILC_SERVER) {
4688 silc_free(client_id);
4692 /* We don't have that client anywhere, add it. The client is added
4693 to global list since server didn't have it in the lists so it must be
4695 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4696 silc_id_dup(client_id, SILC_ID_CLIENT),
4697 sock->user_data, NULL, 0);
4699 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4700 silc_free(client_id);
4704 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4709 silc_free(client_id);
4711 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4712 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4713 "%s", channel->channel_name));
4717 if (!silc_server_client_on_channel(client, channel, &chl)) {
4718 /* Client was not on the channel, add it. */
4719 chl = silc_calloc(1, sizeof(*chl));
4720 chl->client = client;
4722 chl->channel = channel;
4723 silc_hash_table_add(channel->user_list, chl->client, chl);
4724 silc_hash_table_add(client->channels, chl->channel, chl);
4725 channel->user_count++;
4733 /* Saves channels and channels user modes to the `client'. Removes
4734 the client from those channels that are not sent in the list but
4737 void silc_server_save_user_channels(SilcServer server,
4738 SilcSocketConnection sock,
4739 SilcClientEntry client,
4740 SilcBuffer channels,
4741 SilcBuffer channels_user_modes)
4744 SilcUInt32 *chumodes;
4745 SilcChannelPayload entry;
4746 SilcChannelEntry channel;
4747 SilcChannelID *channel_id;
4748 SilcChannelClientEntry chl;
4749 SilcHashTable ht = NULL;
4750 SilcHashTableList htl;
4754 if (!channels || !channels_user_modes ||
4755 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4758 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4759 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4761 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4762 NULL, NULL, NULL, TRUE);
4763 silc_dlist_start(ch);
4764 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4765 /* Check if we have this channel, and add it if we don't have it.
4766 Also add the client on the channel unless it is there already. */
4767 channel_id = silc_channel_get_id_parse(entry);
4768 channel = silc_idlist_find_channel_by_id(server->local_list,
4771 channel = silc_idlist_find_channel_by_id(server->global_list,
4774 if (server->server_type != SILC_SERVER) {
4775 silc_free(channel_id);
4780 /* We don't have that channel anywhere, add it. */
4781 name = silc_channel_get_name(entry, NULL);
4782 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4783 channel_id, server->router,
4786 silc_free(channel_id);
4793 channel->mode = silc_channel_get_mode(entry);
4795 /* Add the client on the channel */
4796 if (!silc_server_client_on_channel(client, channel, &chl)) {
4797 chl = silc_calloc(1, sizeof(*chl));
4798 chl->client = client;
4799 chl->mode = chumodes[i++];
4800 chl->channel = channel;
4801 silc_hash_table_add(channel->user_list, chl->client, chl);
4802 silc_hash_table_add(client->channels, chl->channel, chl);
4803 channel->user_count++;
4806 chl->mode = chumodes[i++];
4809 silc_hash_table_add(ht, channel, channel);
4810 silc_free(channel_id);
4812 silc_channel_payload_list_free(ch);
4813 silc_free(chumodes);
4817 /* Go through the list again and remove client from channels that
4818 are no part of the list. */
4820 silc_hash_table_list(client->channels, &htl);
4821 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4822 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4823 silc_hash_table_del(chl->channel->user_list, chl->client);
4824 silc_hash_table_del(chl->client->channels, chl->channel);
4828 silc_hash_table_list_reset(&htl);
4829 silc_hash_table_free(ht);
4831 silc_hash_table_list(client->channels, &htl);
4832 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4833 silc_hash_table_del(chl->channel->user_list, chl->client);
4834 silc_hash_table_del(chl->client->channels, chl->channel);
4837 silc_hash_table_list_reset(&htl);
4841 /* Lookups route to the client indicated by the `id_data'. The connection
4842 object and internal data object is returned. Returns NULL if route
4843 could not be found to the client. If the `client_id' is specified then
4844 it is used and the `id_data' is ignored. */
4846 SilcSocketConnection
4847 silc_server_get_client_route(SilcServer server,
4848 unsigned char *id_data,
4850 SilcClientID *client_id,
4851 SilcIDListData *idata,
4852 SilcClientEntry *client_entry)
4855 SilcClientEntry client;
4857 SILC_LOG_DEBUG(("Start"));
4860 *client_entry = NULL;
4862 /* Decode destination Client ID */
4864 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4866 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4870 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4873 /* If the destination belongs to our server we don't have to route
4874 the packet anywhere but to send it to the local destination. */
4875 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4879 /* If we are router and the client has router then the client is in
4880 our cell but not directly connected to us. */
4881 if (server->server_type == SILC_ROUTER && client->router) {
4882 /* We are of course in this case the client's router thus the route
4883 to the client is the server who owns the client. So, we will send
4884 the packet to that server. */
4886 *idata = (SilcIDListData)client->router;
4887 return client->router->connection;
4890 /* Seems that client really is directly connected to us */
4892 *idata = (SilcIDListData)client;
4894 *client_entry = client;
4895 return client->connection;
4898 /* Destination belongs to someone not in this server. If we are normal
4899 server our action is to send the packet to our router. */
4900 if (server->server_type != SILC_ROUTER && !server->standalone) {
4903 *idata = (SilcIDListData)server->router;
4904 return SILC_PRIMARY_ROUTE(server);
4907 /* We are router and we will perform route lookup for the destination
4908 and send the packet to fastest route. */
4909 if (server->server_type == SILC_ROUTER && !server->standalone) {
4910 /* Check first that the ID is valid */
4911 client = silc_idlist_find_client_by_id(server->global_list, id,
4914 SilcSocketConnection dst_sock;
4916 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4920 *idata = (SilcIDListData)dst_sock->user_data;
4929 /* Encodes and returns channel list of channels the `client' has joined.
4930 Secret channels are not put to the list. */
4932 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4933 SilcClientEntry client,
4936 SilcBuffer *user_mode_list)
4938 SilcBuffer buffer = NULL;
4939 SilcChannelEntry channel;
4940 SilcChannelClientEntry chl;
4941 SilcHashTableList htl;
4944 SilcUInt16 name_len;
4948 *user_mode_list = NULL;
4950 silc_hash_table_list(client->channels, &htl);
4951 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4952 channel = chl->channel;
4954 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4956 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4959 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4960 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4961 name_len = strlen(channel->channel_name);
4963 len = 4 + name_len + id_len + 4;
4964 buffer = silc_buffer_realloc(buffer,
4965 (buffer ? buffer->truelen + len : len));
4966 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4967 silc_buffer_format(buffer,
4968 SILC_STR_UI_SHORT(name_len),
4969 SILC_STR_UI_XNSTRING(channel->channel_name,
4971 SILC_STR_UI_SHORT(id_len),
4972 SILC_STR_UI_XNSTRING(cid, id_len),
4973 SILC_STR_UI_INT(chl->channel->mode),
4975 silc_buffer_pull(buffer, len);
4978 if (user_mode_list) {
4979 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4981 (*user_mode_list)->truelen + 4 :
4983 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4984 (*user_mode_list)->data));
4985 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4986 silc_buffer_pull(*user_mode_list, 4);
4989 silc_hash_table_list_reset(&htl);
4992 silc_buffer_push(buffer, buffer->data - buffer->head);
4993 if (user_mode_list && *user_mode_list)
4994 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4995 (*user_mode_list)->head));
5000 /* A timeout callback for the re-key. We will be the initiator of the
5003 SILC_TASK_CALLBACK(silc_server_rekey_callback)
5005 SilcServer server = app_context;
5006 SilcSocketConnection sock = (SilcSocketConnection)context;
5007 SilcIDListData idata = (SilcIDListData)sock->user_data;
5008 SilcProtocol protocol;
5009 SilcServerRekeyInternalContext *proto_ctx;
5011 /* Allocate internal protocol context. This is sent as context
5013 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5014 proto_ctx->server = (void *)server;
5015 proto_ctx->sock = sock;
5016 proto_ctx->responder = FALSE;
5017 proto_ctx->pfs = idata->rekey->pfs;
5019 /* Perform rekey protocol. Will call the final callback after the
5020 protocol is over. */
5021 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5022 &protocol, proto_ctx, silc_server_rekey_final);
5023 sock->protocol = protocol;
5025 /* Run the protocol */
5026 silc_protocol_execute(protocol, server->schedule, 0, 0);
5028 SILC_LOG_DEBUG(("Rekey protocol completed"));
5030 /* Re-register re-key timeout */
5031 silc_schedule_task_add(server->schedule, sock->sock,
5032 silc_server_rekey_callback,
5033 context, idata->rekey->timeout, 0,
5034 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5037 /* The final callback for the REKEY protocol. This will actually take the
5038 new key material into use. */
5040 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5042 SilcProtocol protocol = (SilcProtocol)context;
5043 SilcServerRekeyInternalContext *ctx =
5044 (SilcServerRekeyInternalContext *)protocol->context;
5045 SilcServer server = (SilcServer)ctx->server;
5046 SilcSocketConnection sock = ctx->sock;
5048 SILC_LOG_DEBUG(("Start"));
5050 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5051 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5052 /* Error occured during protocol */
5053 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5054 silc_protocol_cancel(protocol, server->schedule);
5055 silc_protocol_free(protocol);
5056 sock->protocol = NULL;
5058 silc_packet_context_free(ctx->packet);
5060 silc_ske_free(ctx->ske);
5065 /* Purge the outgoing data queue to assure that all rekey packets really
5066 go to the network before we quit the protocol. */
5067 silc_server_packet_queue_purge(server, sock);
5070 silc_protocol_free(protocol);
5071 sock->protocol = NULL;
5073 silc_packet_context_free(ctx->packet);
5075 silc_ske_free(ctx->ske);
5079 /* Task callback used to retrieve network statistical information from
5080 router server once in a while. */
5082 SILC_TASK_CALLBACK(silc_server_get_stats)
5084 SilcServer server = (SilcServer)context;
5085 SilcBuffer idp, packet;
5087 SILC_LOG_DEBUG(("Retrieving stats from router"));
5089 if (!server->standalone) {
5090 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5091 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5092 ++server->cmd_ident, 1,
5093 1, idp->data, idp->len);
5094 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5095 SILC_PACKET_COMMAND, 0, packet->data,
5096 packet->len, FALSE);
5097 silc_buffer_free(packet);
5098 silc_buffer_free(idp);
5101 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5102 server, 120, 0, SILC_TASK_TIMEOUT,