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_ROUTER)
494 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
495 server, 10, 0, SILC_TASK_TIMEOUT,
498 if (server->server_type == SILC_ROUTER)
499 server->stat.routers++;
501 SILC_LOG_DEBUG(("Server initialized"));
503 /* We are done here, return succesfully */
507 silc_server_config_unref(&server->config_ref);
508 silc_net_close_server(sock);
512 /* Task callback to close a socket connection after rehash */
514 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
516 SilcServer server = context;
517 SilcSocketConnection sock = server->sockets[fd];
522 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
523 sock->hostname, sock->port,
524 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
525 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
526 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
528 silc_schedule_task_del_by_context(server->schedule, sock);
529 silc_server_disconnect_remote(server, sock,
530 SILC_STATUS_ERR_BANNED_FROM_SERVER,
531 "This connection is removed from "
534 silc_server_free_sock_user_data(server, sock, NULL);
537 /* This function basically reads the config file again and switches the config
538 object pointed by the server object. After that, we have to fix various
539 things such as the server_name and the listening ports.
540 Keep in mind that we no longer have the root privileges at this point. */
542 bool silc_server_rehash(SilcServer server)
544 SilcServerConfig newconfig;
546 SILC_LOG_INFO(("Rehashing server"));
548 /* Reset the logging system */
549 silc_log_quick = TRUE;
550 silc_log_flush_all();
552 /* Start the main rehash phase (read again the config file) */
553 newconfig = silc_server_config_alloc(server->config_file);
555 SILC_LOG_ERROR(("Rehash FAILED."));
559 /* Reinit scheduler if necessary */
560 if (newconfig->param.connections_max > server->config->param.connections_max)
561 if (!silc_schedule_reinit(server->schedule,
562 newconfig->param.connections_max))
565 /* Fix the server_name field */
566 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
567 silc_free(server->server_name);
568 server->server_name = newconfig->server_info->server_name;
569 newconfig->server_info->server_name = NULL;
571 /* Update the idcache list with a fresh pointer */
572 silc_free(server->id_entry->server_name);
573 server->id_entry->server_name = strdup(server->server_name);
574 if (!silc_idcache_del_by_context(server->local_list->servers,
577 if (!silc_idcache_add(server->local_list->servers,
578 server->id_entry->server_name,
579 server->id_entry->id, server->id_entry, 0, NULL))
584 silc_server_config_setlogfiles(server);
586 /* Change new key pair if necessary */
587 if (newconfig->server_info->public_key &&
588 !silc_pkcs_public_key_compare(server->public_key,
589 newconfig->server_info->public_key)) {
590 silc_pkcs_public_key_free(server->public_key);
591 silc_pkcs_private_key_free(server->private_key);
592 server->public_key = newconfig->server_info->public_key;
593 server->private_key = newconfig->server_info->private_key;
594 newconfig->server_info->public_key = NULL;
595 newconfig->server_info->private_key = NULL;
597 /* Allocate PKCS context for local public and private keys */
598 silc_pkcs_free(server->pkcs);
599 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
601 silc_pkcs_public_key_set(server->pkcs, server->public_key);
602 silc_pkcs_private_key_set(server->pkcs, server->private_key);
605 /* Check for unconfigured server and router connections and close
606 connections that were unconfigured. */
608 if (server->config->routers) {
609 SilcServerConfigRouter *ptr;
610 SilcServerConfigRouter *newptr;
613 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
616 /* Check whether new config has this one too */
617 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
618 if (silc_string_compare(newptr->host, ptr->host) &&
619 newptr->port == ptr->port &&
620 newptr->initiator == ptr->initiator) {
626 if (!found && ptr->host) {
627 /* Remove this connection */
628 SilcSocketConnection sock;
629 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
630 ptr->host, ptr->port);
631 if (sock && !SILC_IS_LISTENER(sock))
632 silc_schedule_task_add(server->schedule, sock->sock,
633 silc_server_rehash_close_connection,
634 server, 0, 1, SILC_TASK_TIMEOUT,
635 SILC_TASK_PRI_NORMAL);
640 if (server->config->servers) {
641 SilcServerConfigServer *ptr;
642 SilcServerConfigServer *newptr;
645 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
648 /* Check whether new config has this one too */
649 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
650 if (silc_string_compare(newptr->host, ptr->host)) {
656 if (!found && ptr->host) {
657 /* Remove this connection */
658 SilcSocketConnection sock;
659 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
661 if (sock && !SILC_IS_LISTENER(sock))
662 silc_schedule_task_add(server->schedule, sock->sock,
663 silc_server_rehash_close_connection,
664 server, 0, 1, SILC_TASK_TIMEOUT,
665 SILC_TASK_PRI_NORMAL);
670 if (server->config->clients) {
671 SilcServerConfigClient *ptr;
672 SilcServerConfigClient *newptr;
675 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
678 /* Check whether new config has this one too */
679 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
680 if (silc_string_compare(newptr->host, ptr->host)) {
686 if (!found && ptr->host) {
687 /* Remove this connection */
688 SilcSocketConnection sock;
689 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
692 silc_schedule_task_add(server->schedule, sock->sock,
693 silc_server_rehash_close_connection,
694 server, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
700 /* Go through all configured routers after rehash */
701 silc_schedule_task_add(server->schedule, 0,
702 silc_server_connect_to_router,
703 (void *)server, 0, 1,
705 SILC_TASK_PRI_NORMAL);
707 /* Check whether our router status has changed */
708 if (newconfig->servers) {
709 SilcServerConfigServer *ptr = newconfig->servers;
711 server->server_type = SILC_ROUTER;
713 if (ptr->backup_router) {
714 server->server_type = SILC_BACKUP_ROUTER;
715 server->backup_router = TRUE;
716 server->id_entry->server_type = SILC_BACKUP_ROUTER;
723 /* Our old config is gone now. We'll unreference our reference made in
724 silc_server_init and then destroy it since we are destroying it
725 underneath the application (layer which called silc_server_init). */
726 silc_server_config_unref(&server->config_ref);
727 silc_server_config_destroy(server->config);
729 /* Take new config context */
730 server->config = newconfig;
731 silc_server_config_ref(&server->config_ref, server->config, server->config);
733 SILC_LOG_DEBUG(("Server rehashed"));
738 /* The heart of the server. This runs the scheduler thus runs the server.
739 When this returns the server has been stopped and the program will
742 void silc_server_run(SilcServer server)
744 SILC_LOG_INFO(("SILC Server started"));
746 /* Start the scheduler, the heart of the SILC server. When this returns
747 the program will be terminated. */
748 silc_schedule(server->schedule);
751 /* Stops the SILC server. This function is used to shutdown the server.
752 This is usually called after the scheduler has returned. After stopping
753 the server one should call silc_server_free. */
755 void silc_server_stop(SilcServer server)
757 SILC_LOG_INFO(("SILC Server shutting down"));
759 if (server->schedule) {
762 server->server_shutdown = TRUE;
764 /* Close all connections */
765 for (i = 0; i < server->config->param.connections_max; i++) {
766 if (!server->sockets[i])
768 if (!SILC_IS_LISTENER(server->sockets[i])) {
769 SilcSocketConnection sock = server->sockets[i];
770 SilcIDListData idata = sock->user_data;
773 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
775 silc_schedule_task_del_by_context(server->schedule,
777 silc_server_disconnect_remote(server, server->sockets[i],
779 "Server is shutting down");
781 silc_server_free_sock_user_data(server, sock,
782 "Server is shutting down");
783 silc_socket_free(sock);
785 silc_socket_free(server->sockets[i]);
786 server->sockets[i] = NULL;
790 /* We are not connected to network anymore */
791 server->standalone = TRUE;
793 silc_schedule_stop(server->schedule);
794 silc_schedule_uninit(server->schedule);
795 server->schedule = NULL;
797 silc_free(server->sockets);
798 server->sockets = NULL;
801 silc_server_protocols_unregister();
803 SILC_LOG_DEBUG(("Server stopped"));
806 /* Function that is called when the network connection to a router has
807 been established. This will continue with the key exchange protocol
808 with the remote router. */
810 void silc_server_start_key_exchange(SilcServer server,
811 SilcServerConnection sconn,
814 SilcSocketConnection newsocket;
815 SilcProtocol protocol;
816 SilcServerKEInternalContext *proto_ctx;
817 SilcServerConfigRouter *conn =
818 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
821 /* Cancel any possible retry timeouts */
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Set socket options */
826 silc_net_set_socket_nonblock(sock);
827 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
829 /* Create socket connection for the connection. Even though we
830 know that we are connecting to a router we will mark the socket
831 to be unknown connection until we have executed authentication
833 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
834 server->sockets[sock] = newsocket;
835 newsocket->hostname = strdup(sconn->remote_host);
836 newsocket->ip = strdup(sconn->remote_host);
837 newsocket->port = sconn->remote_port;
838 sconn->sock = newsocket;
840 /* Allocate internal protocol context. This is sent as context
842 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
843 proto_ctx->server = (void *)server;
844 proto_ctx->context = (void *)sconn;
845 proto_ctx->sock = newsocket;
846 proto_ctx->rng = server->rng;
847 proto_ctx->responder = FALSE;
849 /* Set Key Exchange flags from configuration, but fall back to global
851 SILC_GET_SKE_FLAGS(conn, proto_ctx);
852 if (server->config->param.key_exchange_pfs)
853 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
855 /* Perform key exchange protocol. silc_server_connect_to_router_second
856 will be called after the protocol is finished. */
857 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
858 &protocol, proto_ctx,
859 silc_server_connect_to_router_second);
860 newsocket->protocol = protocol;
862 /* Register a timeout task that will be executed if the protocol
863 is not executed within set limit. */
864 proto_ctx->timeout_task =
865 silc_schedule_task_add(server->schedule, sock,
866 silc_server_timeout_remote,
867 server, server->config->key_exchange_timeout, 0,
871 /* Register the connection for network input and output. This sets
872 that scheduler will listen for incoming packets for this connection
873 and sets that outgoing packets may be sent to this connection as
874 well. However, this doesn't set the scheduler for outgoing traffic,
875 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
876 later when outgoing data is available. */
877 context = (void *)server;
878 SILC_REGISTER_CONNECTION_FOR_IO(sock);
880 /* Run the protocol */
881 silc_protocol_execute(protocol, server->schedule, 0, 0);
884 /* Timeout callback that will be called to retry connecting to remote
885 router. This is used by both normal and router server. This will wait
886 before retrying the connecting. The timeout is generated by exponential
887 backoff algorithm. */
889 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
891 SilcServer server = app_context;
892 SilcServerConnection sconn = (SilcServerConnection)context;
893 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
894 SilcServerConfigConnParams *param =
895 (conn->param ? conn->param : &server->config->param);
897 /* Don't retry if we are shutting down. */
898 if (server->server_shutdown) {
899 silc_server_config_unref(&sconn->conn);
900 silc_free(sconn->remote_host);
901 silc_free(sconn->backup_replace_ip);
906 SILC_LOG_INFO(("Retrying connecting to a router"));
908 /* Calculate next timeout */
909 if (sconn->retry_count >= 1) {
910 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
911 if (sconn->retry_timeout > param->reconnect_interval_max)
912 sconn->retry_timeout = param->reconnect_interval_max;
914 sconn->retry_timeout = param->reconnect_interval;
916 sconn->retry_count++;
917 sconn->retry_timeout = sconn->retry_timeout +
918 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
920 /* If we've reached max retry count, give up. */
921 if ((sconn->retry_count > param->reconnect_count) &&
922 !param->reconnect_keep_trying) {
923 SILC_LOG_ERROR(("Could not connect to router, giving up"));
924 silc_server_config_unref(&sconn->conn);
925 silc_free(sconn->remote_host);
926 silc_free(sconn->backup_replace_ip);
931 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
932 sconn->retry_timeout));
934 /* We will lookup a fresh pointer later */
935 silc_server_config_unref(&sconn->conn);
937 /* Wait one before retrying */
938 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
939 context, sconn->retry_timeout, 0,
940 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
943 /* Generic routine to use connect to a router. */
945 SILC_TASK_CALLBACK(silc_server_connect_router)
947 SilcServer server = app_context;
948 SilcServerConnection sconn = (SilcServerConnection)context;
949 SilcServerConfigRouter *rconn;
952 /* Don't connect if we are shutting down. */
953 if (server->server_shutdown) {
954 silc_free(sconn->remote_host);
955 silc_free(sconn->backup_replace_ip);
960 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
961 (sconn->backup ? "backup router" : "router"),
962 sconn->remote_host, sconn->remote_port));
964 server->router_connect = time(NULL);
965 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
968 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
969 (sconn->backup ? "backup router" : "router"),
970 sconn->remote_host, sconn->remote_port));
971 silc_free(sconn->remote_host);
972 silc_free(sconn->backup_replace_ip);
976 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
978 /* Connect to remote host */
979 sock = silc_net_create_connection(
980 (!server->config->server_info->primary ? NULL :
981 server->config->server_info->primary->server_ip),
982 sconn->remote_port, sconn->remote_host);
984 SILC_LOG_ERROR(("Could not connect to router %s:%d",
985 sconn->remote_host, sconn->remote_port));
986 if (!sconn->no_reconnect)
987 silc_schedule_task_add(server->schedule, 0,
988 silc_server_connect_to_router_retry,
989 context, 0, 1, SILC_TASK_TIMEOUT,
990 SILC_TASK_PRI_NORMAL);
992 silc_server_config_unref(&sconn->conn);
993 silc_free(sconn->remote_host);
994 silc_free(sconn->backup_replace_ip);
1000 /* Continue with key exchange protocol */
1001 silc_server_start_key_exchange(server, sconn, sock);
1004 /* This function connects to our primary router or if we are a router this
1005 establishes all our primary routes. This is called at the start of the
1006 server to do authentication and key exchange with our router - called
1009 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1011 SilcServer server = (SilcServer)context;
1012 SilcServerConnection sconn;
1013 SilcServerConfigRouter *ptr;
1015 /* Don't connect if we are shutting down. */
1016 if (server->server_shutdown)
1019 SILC_LOG_DEBUG(("We are %s",
1020 (server->server_type == SILC_SERVER ?
1021 "normal server" : server->server_type == SILC_ROUTER ?
1022 "router" : "backup router/normal server")));
1024 if (!server->config->routers) {
1025 /* There wasn't a configured router, we will continue but we don't
1026 have a connection to outside world. We will be standalone server. */
1027 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1028 server->standalone = TRUE;
1032 /* Cancel any possible retry timeouts */
1033 silc_schedule_task_del_by_callback(server->schedule,
1034 silc_server_connect_router);
1035 silc_schedule_task_del_by_callback(server->schedule,
1036 silc_server_connect_to_router_retry);
1038 /* Create the connections to all our routes */
1039 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1041 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1042 ptr->backup_router ? "Backup router" : "Router",
1043 ptr->initiator ? "Initiator" : "Responder",
1044 ptr->host, ptr->port));
1046 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1047 ptr->initiator == FALSE && !server->backup_router &&
1048 !silc_server_config_get_backup_router(server))
1049 server->wait_backup = TRUE;
1051 if (ptr->initiator) {
1052 /* Check whether we are connected to this host already */
1053 if (silc_server_num_sockets_by_remote(server,
1054 silc_net_is_ip(ptr->host) ?
1056 silc_net_is_ip(ptr->host) ?
1057 NULL : ptr->host, ptr->port,
1058 SILC_SOCKET_TYPE_ROUTER)) {
1059 SILC_LOG_DEBUG(("We are already connected to this router"));
1063 /* Allocate connection object for hold connection specific stuff. */
1064 sconn = silc_calloc(1, sizeof(*sconn));
1065 sconn->remote_host = strdup(ptr->host);
1066 sconn->remote_port = ptr->port;
1067 sconn->backup = ptr->backup_router;
1068 if (sconn->backup) {
1069 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1070 sconn->backup_replace_port = ptr->backup_replace_port;
1073 if (!server->router_conn && !sconn->backup)
1074 server->router_conn = sconn;
1076 silc_schedule_task_add(server->schedule, 0,
1077 silc_server_connect_router,
1078 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1079 SILC_TASK_PRI_NORMAL);
1084 /* Second part of connecting to router(s). Key exchange protocol has been
1085 executed and now we will execute authentication protocol. */
1087 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1089 SilcProtocol protocol = (SilcProtocol)context;
1090 SilcServerKEInternalContext *ctx =
1091 (SilcServerKEInternalContext *)protocol->context;
1092 SilcServer server = (SilcServer)ctx->server;
1093 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1094 SilcSocketConnection sock = ctx->sock;
1095 SilcServerConnAuthInternalContext *proto_ctx;
1096 SilcServerConfigRouter *conn = NULL;
1098 SILC_LOG_DEBUG(("Start"));
1100 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1101 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1102 /* Error occured during protocol */
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1105 silc_ske_free_key_material(ctx->keymat);
1107 silc_packet_context_free(ctx->packet);
1109 silc_ske_free(ctx->ske);
1110 silc_free(ctx->dest_id);
1112 silc_schedule_task_del_by_callback(server->schedule,
1113 silc_server_failure_callback);
1114 silc_server_disconnect_remote(server, sock,
1115 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1117 /* Try reconnecting if configuration wants it */
1118 if (!sconn->no_reconnect) {
1119 silc_schedule_task_add(server->schedule, 0,
1120 silc_server_connect_to_router_retry,
1121 sconn, 0, 1, SILC_TASK_TIMEOUT,
1122 SILC_TASK_PRI_NORMAL);
1126 /* Call completion to indicate error */
1127 if (sconn->callback)
1128 (*sconn->callback)(server, NULL, sconn->callback_context);
1130 silc_server_config_unref(&sconn->conn);
1131 silc_free(sconn->remote_host);
1132 silc_free(sconn->backup_replace_ip);
1137 /* We now have the key material as the result of the key exchange
1138 protocol. Take the key material into use. Free the raw key material
1139 as soon as we've set them into use. */
1140 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1141 ctx->sock, ctx->keymat,
1142 ctx->ske->prop->cipher,
1143 ctx->ske->prop->pkcs,
1144 ctx->ske->prop->hash,
1145 ctx->ske->prop->hmac,
1146 ctx->ske->prop->group,
1148 silc_protocol_free(protocol);
1149 sock->protocol = NULL;
1150 silc_ske_free_key_material(ctx->keymat);
1152 silc_packet_context_free(ctx->packet);
1154 silc_ske_free(ctx->ske);
1155 silc_free(ctx->dest_id);
1157 silc_schedule_task_del_by_callback(server->schedule,
1158 silc_server_failure_callback);
1159 silc_server_disconnect_remote(server, sock,
1160 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1162 /* Try reconnecting if configuration wants it */
1163 if (!sconn->no_reconnect) {
1164 silc_schedule_task_add(server->schedule, 0,
1165 silc_server_connect_to_router_retry,
1166 sconn, 0, 1, SILC_TASK_TIMEOUT,
1167 SILC_TASK_PRI_NORMAL);
1171 /* Call completion to indicate error */
1172 if (sconn->callback)
1173 (*sconn->callback)(server, NULL, sconn->callback_context);
1175 silc_server_config_unref(&sconn->conn);
1176 silc_free(sconn->remote_host);
1177 silc_free(sconn->backup_replace_ip);
1181 silc_ske_free_key_material(ctx->keymat);
1183 /* Allocate internal context for the authentication protocol. This
1184 is sent as context for the protocol. */
1185 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1186 proto_ctx->server = (void *)server;
1187 proto_ctx->context = (void *)sconn;
1188 proto_ctx->sock = sock;
1189 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1190 proto_ctx->dest_id_type = ctx->dest_id_type;
1191 proto_ctx->dest_id = ctx->dest_id;
1193 /* Resolve the authentication method used in this connection. Check if
1194 we find a match from user configured connections */
1195 if (!sconn->conn.ref_ptr)
1196 conn = silc_server_config_find_router_conn(server, sock->hostname,
1199 conn = sconn->conn.ref_ptr;
1202 /* Match found. Use the configured authentication method. Take only
1203 the passphrase, since for public key auth we automatically use
1204 our local key pair. */
1205 if (conn->passphrase) {
1206 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1207 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1209 proto_ctx->auth_data = strdup(conn->passphrase);
1210 proto_ctx->auth_data_len = strlen(conn->passphrase);
1211 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1213 } else if (conn->publickeys) {
1214 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1216 proto_ctx->auth_meth = SILC_AUTH_NONE;
1219 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1220 sock->hostname, sock->ip, sock->port));
1221 silc_protocol_free(protocol);
1222 sock->protocol = NULL;
1224 silc_packet_context_free(ctx->packet);
1226 silc_ske_free(ctx->ske);
1227 silc_free(ctx->dest_id);
1229 silc_server_config_unref(&sconn->conn);
1230 silc_free(sconn->remote_host);
1231 silc_free(sconn->backup_replace_ip);
1233 silc_schedule_task_del_by_callback(server->schedule,
1234 silc_server_failure_callback);
1235 silc_server_disconnect_remote(server, sock,
1236 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1240 /* Free old protocol as it is finished now */
1241 silc_protocol_free(protocol);
1243 silc_packet_context_free(ctx->packet);
1245 sock->protocol = NULL;
1247 /* Allocate the authentication protocol. This is allocated here
1248 but we won't start it yet. We will be receiving party of this
1249 protocol thus we will wait that connecting party will make
1250 their first move. */
1251 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1252 &sock->protocol, proto_ctx,
1253 silc_server_connect_to_router_final);
1255 /* Register timeout task. If the protocol is not executed inside
1256 this timelimit the connection will be terminated. */
1257 proto_ctx->timeout_task =
1258 silc_schedule_task_add(server->schedule, sock->sock,
1259 silc_server_timeout_remote,
1261 server->config->conn_auth_timeout, 0,
1265 /* Run the protocol */
1266 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1269 /* Finalizes the connection to router. Registers a server task to the
1270 queue so that we can accept new connections. */
1272 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1274 SilcProtocol protocol = (SilcProtocol)context;
1275 SilcServerConnAuthInternalContext *ctx =
1276 (SilcServerConnAuthInternalContext *)protocol->context;
1277 SilcServer server = (SilcServer)ctx->server;
1278 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1279 SilcSocketConnection sock = ctx->sock;
1280 SilcServerEntry id_entry = NULL;
1282 unsigned char *id_string;
1284 SilcIDListData idata;
1285 SilcServerConfigRouter *conn = NULL;
1286 SilcServerConfigConnParams *param = NULL;
1288 SILC_LOG_DEBUG(("Start"));
1290 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1291 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1292 /* Error occured during protocol */
1293 silc_free(ctx->dest_id);
1294 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1297 /* Try reconnecting if configuration wants it */
1298 if (!sconn->no_reconnect) {
1299 silc_schedule_task_add(server->schedule, 0,
1300 silc_server_connect_to_router_retry,
1301 sconn, 0, 1, SILC_TASK_TIMEOUT,
1302 SILC_TASK_PRI_NORMAL);
1309 /* Add a task to the queue. This task receives new connections to the
1310 server. This task remains on the queue until the end of the program. */
1311 if (!server->listenning && !sconn->backup) {
1312 silc_schedule_task_add(server->schedule, server->sock,
1313 silc_server_accept_new_connection,
1314 (void *)server, 0, 0,
1316 SILC_TASK_PRI_NORMAL);
1317 server->listenning = TRUE;
1320 /* Send NEW_SERVER packet to the router. We will become registered
1321 to the SILC network after sending this packet. */
1322 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1323 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1324 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1325 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1326 silc_buffer_format(packet,
1327 SILC_STR_UI_SHORT(id_len),
1328 SILC_STR_UI_XNSTRING(id_string, id_len),
1329 SILC_STR_UI_SHORT(strlen(server->server_name)),
1330 SILC_STR_UI_XNSTRING(server->server_name,
1331 strlen(server->server_name)),
1334 /* Send the packet */
1335 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1336 packet->data, packet->len, TRUE);
1337 silc_buffer_free(packet);
1338 silc_free(id_string);
1340 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1342 /* Check that we do not have this ID already */
1343 id_entry = silc_idlist_find_server_by_id(server->local_list,
1344 ctx->dest_id, TRUE, NULL);
1346 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1348 id_entry = silc_idlist_find_server_by_id(server->global_list,
1349 ctx->dest_id, TRUE, NULL);
1351 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1354 SILC_LOG_DEBUG(("New server id(%s)",
1355 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1357 /* Add the connected router to global server list. Router is sent
1358 as NULL since it's local to us. */
1359 id_entry = silc_idlist_add_server(server->global_list,
1360 strdup(sock->hostname),
1361 SILC_ROUTER, ctx->dest_id, NULL, sock);
1363 silc_free(ctx->dest_id);
1364 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1365 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1370 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1371 silc_free(sock->user_data);
1372 sock->user_data = (void *)id_entry;
1373 sock->type = SILC_SOCKET_TYPE_ROUTER;
1374 idata = (SilcIDListData)sock->user_data;
1375 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1376 SILC_IDLIST_STATUS_LOCAL);
1378 conn = sconn->conn.ref_ptr;
1379 param = &server->config->param;
1380 if (conn && conn->param)
1381 param = conn->param;
1383 /* Perform keepalive. */
1384 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1385 silc_server_perform_heartbeat,
1388 /* Register re-key timeout */
1389 idata->rekey->timeout = param->key_exchange_rekey;
1390 silc_schedule_task_add(server->schedule, sock->sock,
1391 silc_server_rekey_callback,
1392 (void *)sock, idata->rekey->timeout, 0,
1393 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1395 if (!sconn->backup) {
1396 /* Mark this router our primary router if we're still standalone */
1397 if (server->standalone) {
1398 SILC_LOG_DEBUG(("This connection is our primary router"));
1399 server->id_entry->router = id_entry;
1400 server->router = id_entry;
1401 server->standalone = FALSE;
1403 /* If we are router then announce our possible servers. Backup
1404 router announces also global servers. */
1405 if (server->server_type == SILC_ROUTER)
1406 silc_server_announce_servers(server,
1407 server->backup_router ? TRUE : FALSE,
1408 0, SILC_PRIMARY_ROUTE(server));
1410 /* Announce our clients and channels to the router */
1411 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1412 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1414 /* If we are backup router then this primary router is whom we are
1416 if (server->server_type == SILC_BACKUP_ROUTER)
1417 silc_server_backup_add(server, server->id_entry, sock->ip,
1418 sconn->remote_port, TRUE);
1421 /* Add this server to be our backup router */
1422 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1423 sconn->backup_replace_port, FALSE);
1426 sock->protocol = NULL;
1429 /* Call the completion callback to indicate that we've connected to
1431 if (sconn && sconn->callback)
1432 (*sconn->callback)(server, id_entry, sconn->callback_context);
1434 /* Free the temporary connection data context */
1436 silc_server_config_unref(&sconn->conn);
1437 silc_free(sconn->remote_host);
1438 silc_free(sconn->backup_replace_ip);
1441 if (sconn == server->router_conn)
1442 server->router_conn = NULL;
1445 /* Free the protocol object */
1446 if (sock->protocol == protocol)
1447 sock->protocol = NULL;
1448 silc_protocol_free(protocol);
1450 silc_packet_context_free(ctx->packet);
1452 silc_ske_free(ctx->ske);
1453 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1454 silc_free(ctx->auth_data);
1458 /* Host lookup callback that is called after the incoming connection's
1459 IP and FQDN lookup is performed. This will actually check the acceptance
1460 of the incoming connection and will register the key exchange protocol
1461 for this connection. */
1464 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1467 SilcServerKEInternalContext *proto_ctx =
1468 (SilcServerKEInternalContext *)context;
1469 SilcServer server = (SilcServer)proto_ctx->server;
1470 SilcServerConfigClient *cconfig = NULL;
1471 SilcServerConfigServer *sconfig = NULL;
1472 SilcServerConfigRouter *rconfig = NULL;
1473 SilcServerConfigDeny *deny;
1476 /* Check whether we could resolve both IP and FQDN. */
1477 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1478 server->config->require_reverse_lookup)) {
1479 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1480 sock->hostname ? sock->hostname :
1481 sock->ip ? sock->ip : ""));
1482 server->stat.conn_failures++;
1483 silc_server_disconnect_remote(server, sock,
1484 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1485 "Unknown host or IP");
1486 silc_free(proto_ctx);
1490 /* Register the connection for network input and output. This sets
1491 that scheduler will listen for incoming packets for this connection
1492 and sets that outgoing packets may be sent to this connection as well.
1493 However, this doesn't set the scheduler for outgoing traffic, it
1494 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1495 later when outgoing data is available. */
1496 context = (void *)server;
1497 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1499 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1502 /* Listenning port */
1503 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1504 silc_server_disconnect_remote(server, sock,
1505 SILC_STATUS_ERR_RESOURCE_LIMIT,
1506 "Connection refused");
1507 server->stat.conn_failures++;
1508 silc_free(proto_ctx);
1511 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1513 /* Check whether this connection is denied to connect to us. */
1514 deny = silc_server_config_find_denied(server, sock->ip);
1516 deny = silc_server_config_find_denied(server, sock->hostname);
1518 /* The connection is denied */
1519 SILC_LOG_INFO(("Connection %s (%s) is denied",
1520 sock->hostname, sock->ip));
1521 silc_server_disconnect_remote(server, sock,
1522 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1524 server->stat.conn_failures++;
1525 silc_free(proto_ctx);
1529 /* Check whether we have configured this sort of connection at all. We
1530 have to check all configurations since we don't know what type of
1531 connection this is. */
1532 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1533 cconfig = silc_server_config_find_client(server, sock->hostname);
1534 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1535 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1536 if (server->server_type == SILC_ROUTER) {
1537 if (!(rconfig = silc_server_config_find_router_conn(server,
1538 sock->ip, sock->port)))
1539 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1542 if (!cconfig && !sconfig && !rconfig) {
1543 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1545 silc_server_disconnect_remote(server, sock,
1546 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1547 server->stat.conn_failures++;
1548 silc_free(proto_ctx);
1552 /* The connection is allowed */
1554 /* Set internal context for key exchange protocol. This is
1555 sent as context for the protocol. */
1556 proto_ctx->sock = sock;
1557 proto_ctx->rng = server->rng;
1558 proto_ctx->responder = TRUE;
1559 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1560 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1561 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1563 /* Take flags for key exchange. Since we do not know what type of connection
1564 this is, we go through all found configurations and use the global ones
1565 as well. This will result always into strictest key exchange flags. */
1566 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1567 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1568 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1569 if (server->config->param.key_exchange_pfs)
1570 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1572 /* Prepare the connection for key exchange protocol. We allocate the
1573 protocol but will not start it yet. The connector will be the
1574 initiator of the protocol thus we will wait for initiation from
1575 there before we start the protocol. */
1576 server->stat.auth_attempts++;
1577 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1578 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1579 &sock->protocol, proto_ctx,
1580 silc_server_accept_new_connection_second);
1582 /* Register a timeout task that will be executed if the connector
1583 will not start the key exchange protocol within specified timeout
1584 and the connection will be closed. */
1585 proto_ctx->timeout_task =
1586 silc_schedule_task_add(server->schedule, sock->sock,
1587 silc_server_timeout_remote,
1589 server->config->key_exchange_timeout, 0,
1594 /* Accepts new connections to the server. Accepting new connections are
1595 done in three parts to make it async. */
1597 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1599 SilcServer server = (SilcServer)context;
1600 SilcSocketConnection newsocket;
1601 SilcServerKEInternalContext *proto_ctx;
1604 SILC_LOG_DEBUG(("Accepting new connection"));
1606 server->stat.conn_attempts++;
1608 sock = silc_net_accept_connection(fd);
1610 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1611 server->stat.conn_failures++;
1615 /* Check for maximum allowed connections */
1616 if (sock > server->config->param.connections_max) {
1617 SILC_LOG_ERROR(("Refusing connection, server is full"));
1618 server->stat.conn_failures++;
1619 silc_net_close_connection(sock);
1623 /* Set socket options */
1624 silc_net_set_socket_nonblock(sock);
1625 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1627 /* We don't create a ID yet, since we don't know what type of connection
1628 this is yet. But, we do add the connection to the socket table. */
1629 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1630 server->sockets[sock] = newsocket;
1632 /* Perform asynchronous host lookup. This will lookup the IP and the
1633 FQDN of the remote connection. After the lookup is done the connection
1634 is accepted further. */
1635 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1636 proto_ctx->server = server;
1637 proto_ctx->context = (void *)fd;
1638 silc_socket_host_lookup(newsocket, TRUE,
1639 silc_server_accept_new_connection_lookup,
1640 (void *)proto_ctx, server->schedule);
1643 /* Second part of accepting new connection. Key exchange protocol has been
1644 performed and now it is time to do little connection authentication
1645 protocol to figure out whether this connection is client or server
1646 and whether it has right to access this server (especially server
1647 connections needs to be authenticated). */
1649 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1651 SilcProtocol protocol = (SilcProtocol)context;
1652 SilcServerKEInternalContext *ctx =
1653 (SilcServerKEInternalContext *)protocol->context;
1654 SilcServer server = (SilcServer)ctx->server;
1655 SilcSocketConnection sock = ctx->sock;
1656 SilcServerConnAuthInternalContext *proto_ctx;
1658 SILC_LOG_DEBUG(("Start"));
1660 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1661 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1662 /* Error occured during protocol */
1663 SILC_LOG_DEBUG(("Error key exchange protocol"));
1664 silc_protocol_free(protocol);
1665 sock->protocol = NULL;
1666 silc_ske_free_key_material(ctx->keymat);
1668 silc_packet_context_free(ctx->packet);
1670 silc_ske_free(ctx->ske);
1671 silc_free(ctx->dest_id);
1672 silc_server_config_unref(&ctx->cconfig);
1673 silc_server_config_unref(&ctx->sconfig);
1674 silc_server_config_unref(&ctx->rconfig);
1676 silc_schedule_task_del_by_callback(server->schedule,
1677 silc_server_failure_callback);
1678 silc_server_disconnect_remote(server, sock,
1679 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1681 server->stat.auth_failures++;
1685 /* We now have the key material as the result of the key exchange
1686 protocol. Take the key material into use. Free the raw key material
1687 as soon as we've set them into use. */
1688 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1689 ctx->sock, ctx->keymat,
1690 ctx->ske->prop->cipher,
1691 ctx->ske->prop->pkcs,
1692 ctx->ske->prop->hash,
1693 ctx->ske->prop->hmac,
1694 ctx->ske->prop->group,
1696 SILC_LOG_ERROR(("Error setting key material in use"));
1697 silc_protocol_free(protocol);
1698 sock->protocol = NULL;
1699 silc_ske_free_key_material(ctx->keymat);
1701 silc_packet_context_free(ctx->packet);
1703 silc_ske_free(ctx->ske);
1704 silc_free(ctx->dest_id);
1705 silc_server_config_unref(&ctx->cconfig);
1706 silc_server_config_unref(&ctx->sconfig);
1707 silc_server_config_unref(&ctx->rconfig);
1709 silc_schedule_task_del_by_callback(server->schedule,
1710 silc_server_failure_callback);
1711 silc_server_disconnect_remote(server, sock,
1712 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1713 server->stat.auth_failures++;
1716 silc_ske_free_key_material(ctx->keymat);
1718 /* Allocate internal context for the authentication protocol. This
1719 is sent as context for the protocol. */
1720 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1721 proto_ctx->server = (void *)server;
1722 proto_ctx->sock = sock;
1723 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1724 proto_ctx->responder = TRUE;
1725 proto_ctx->dest_id_type = ctx->dest_id_type;
1726 proto_ctx->dest_id = ctx->dest_id;
1727 proto_ctx->cconfig = ctx->cconfig;
1728 proto_ctx->sconfig = ctx->sconfig;
1729 proto_ctx->rconfig = ctx->rconfig;
1731 /* Free old protocol as it is finished now */
1732 silc_protocol_free(protocol);
1734 silc_packet_context_free(ctx->packet);
1736 sock->protocol = NULL;
1738 /* Allocate the authentication protocol. This is allocated here
1739 but we won't start it yet. We will be receiving party of this
1740 protocol thus we will wait that connecting party will make
1741 their first move. */
1742 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1743 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1744 &sock->protocol, proto_ctx,
1745 silc_server_accept_new_connection_final);
1747 /* Register timeout task. If the protocol is not executed inside
1748 this timelimit the connection will be terminated. */
1749 proto_ctx->timeout_task =
1750 silc_schedule_task_add(server->schedule, sock->sock,
1751 silc_server_timeout_remote,
1753 server->config->conn_auth_timeout, 0,
1758 /* After this is called, server don't wait for backup router anymore.
1759 This gets called automatically even after we have backup router
1760 connection established. */
1762 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1764 SilcServer server = context;
1765 server->wait_backup = FALSE;
1768 /* Final part of accepting new connection. The connection has now
1769 been authenticated and keys has been exchanged. We also know whether
1770 this is client or server connection. */
1772 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1774 SilcProtocol protocol = (SilcProtocol)context;
1775 SilcServerConnAuthInternalContext *ctx =
1776 (SilcServerConnAuthInternalContext *)protocol->context;
1777 SilcServer server = (SilcServer)ctx->server;
1778 SilcSocketConnection sock = ctx->sock;
1779 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1781 SilcServerConfigConnParams *param = &server->config->param;
1783 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1784 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1785 /* Error occured during protocol */
1786 SILC_LOG_DEBUG(("Error during authentication protocol"));
1787 silc_protocol_free(protocol);
1788 sock->protocol = NULL;
1790 silc_packet_context_free(ctx->packet);
1792 silc_ske_free(ctx->ske);
1793 silc_free(ctx->dest_id);
1794 silc_server_config_unref(&ctx->cconfig);
1795 silc_server_config_unref(&ctx->sconfig);
1796 silc_server_config_unref(&ctx->rconfig);
1798 silc_schedule_task_del_by_callback(server->schedule,
1799 silc_server_failure_callback);
1800 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1802 server->stat.auth_failures++;
1806 entry->data.last_receive = time(NULL);
1808 switch (ctx->conn_type) {
1809 case SILC_SOCKET_TYPE_CLIENT:
1811 SilcClientEntry client;
1812 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1814 /* Verify whether this connection is after all allowed to connect */
1815 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1816 &server->config->param,
1817 conn->param, ctx->ske)) {
1818 server->stat.auth_failures++;
1822 /* If we are primary router and we have backup router configured
1823 but it has not connected to use yet, do not accept any other
1825 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1826 !server->backup_router) {
1827 SilcServerConfigRouter *router;
1828 router = silc_server_config_get_backup_router(server);
1829 if (router && strcmp(server->config->server_info->primary->server_ip,
1831 silc_server_find_socket_by_host(server,
1832 SILC_SOCKET_TYPE_SERVER,
1833 router->backup_replace_ip, 0)) {
1834 SILC_LOG_INFO(("Will not accept connections because we do "
1835 "not have backup router connection established"));
1836 silc_server_disconnect_remote(server, sock,
1837 SILC_STATUS_ERR_PERM_DENIED,
1838 "We do not have connection to backup "
1839 "router established, try later");
1840 silc_free(sock->user_data);
1841 server->stat.auth_failures++;
1843 /* From here on, wait 10 seconds for the backup router to appear. */
1844 silc_schedule_task_add(server->schedule, 0,
1845 silc_server_backup_router_wait,
1846 (void *)server, 10, 0,
1847 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1852 SILC_LOG_DEBUG(("Remote host is client"));
1853 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1856 /* Add the client to the client ID cache. The nickname and Client ID
1857 and other information is created after we have received NEW_CLIENT
1858 packet from client. */
1859 client = silc_idlist_add_client(server->local_list,
1860 NULL, NULL, NULL, NULL, NULL, sock, 0);
1862 SILC_LOG_ERROR(("Could not add new client to cache"));
1863 silc_free(sock->user_data);
1864 silc_server_disconnect_remote(server, sock,
1865 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1866 server->stat.auth_failures++;
1869 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1872 server->stat.my_clients++;
1873 server->stat.clients++;
1874 server->stat.cell_clients++;
1876 /* Get connection parameters */
1878 param = conn->param;
1880 if (!param->keepalive_secs)
1881 param->keepalive_secs = server->config->param.keepalive_secs;
1883 if (!param->qos && server->config->param.qos) {
1884 param->qos = server->config->param.qos;
1885 param->qos_rate_limit = server->config->param.qos_rate_limit;
1886 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1887 param->qos_limit_sec = server->config->param.qos_limit_sec;
1888 param->qos_limit_usec = server->config->param.qos_limit_usec;
1891 /* Check if to be anonymous connection */
1892 if (param->anonymous)
1893 client->mode |= SILC_UMODE_ANONYMOUS;
1896 id_entry = (void *)client;
1899 case SILC_SOCKET_TYPE_SERVER:
1900 case SILC_SOCKET_TYPE_ROUTER:
1902 SilcServerEntry new_server;
1903 bool initiator = FALSE;
1904 bool backup_local = FALSE;
1905 bool backup_router = FALSE;
1906 char *backup_replace_ip = NULL;
1907 SilcUInt16 backup_replace_port = 0;
1908 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1909 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1911 /* If we are backup router and this is incoming server connection
1912 and we do not have connection to primary router, do not allow
1914 if (server->server_type == SILC_BACKUP_ROUTER &&
1915 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1916 !SILC_PRIMARY_ROUTE(server)) {
1917 SILC_LOG_INFO(("Will not accept server connection because we do "
1918 "not have primary router connection established"));
1919 silc_server_disconnect_remote(server, sock,
1920 SILC_STATUS_ERR_PERM_DENIED,
1921 "We do not have connection to primary "
1922 "router established, try later");
1923 silc_free(sock->user_data);
1924 server->stat.auth_failures++;
1928 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1929 /* Verify whether this connection is after all allowed to connect */
1930 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1931 &server->config->param,
1932 rconn ? rconn->param : NULL,
1934 silc_free(sock->user_data);
1935 server->stat.auth_failures++;
1941 param = rconn->param;
1943 if (!param->keepalive_secs)
1944 param->keepalive_secs = server->config->param.keepalive_secs;
1946 if (!param->qos && server->config->param.qos) {
1947 param->qos = server->config->param.qos;
1948 param->qos_rate_limit = server->config->param.qos_rate_limit;
1949 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1950 param->qos_limit_sec = server->config->param.qos_limit_sec;
1951 param->qos_limit_usec = server->config->param.qos_limit_usec;
1955 initiator = rconn->initiator;
1956 backup_local = rconn->backup_local;
1957 backup_router = rconn->backup_router;
1958 backup_replace_ip = rconn->backup_replace_ip;
1959 backup_replace_port = rconn->backup_replace_port;
1963 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1964 /* Verify whether this connection is after all allowed to connect */
1965 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1966 &server->config->param,
1967 sconn ? sconn->param : NULL,
1969 silc_free(sock->user_data);
1970 server->stat.auth_failures++;
1975 param = sconn->param;
1977 if (!param->keepalive_secs)
1978 param->keepalive_secs = server->config->param.keepalive_secs;
1980 if (!param->qos && server->config->param.qos) {
1981 param->qos = server->config->param.qos;
1982 param->qos_rate_limit = server->config->param.qos_rate_limit;
1983 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1984 param->qos_limit_sec = server->config->param.qos_limit_sec;
1985 param->qos_limit_usec = server->config->param.qos_limit_usec;
1989 backup_router = sconn->backup_router;
1993 /* If we are primary router and we have backup router configured
1994 but it has not connected to use yet, do not accept any other
1996 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1997 !server->backup_router && !backup_router) {
1998 SilcServerConfigRouter *router;
1999 router = silc_server_config_get_backup_router(server);
2000 if (router && strcmp(server->config->server_info->primary->server_ip,
2002 silc_server_find_socket_by_host(server,
2003 SILC_SOCKET_TYPE_SERVER,
2004 router->backup_replace_ip, 0)) {
2005 SILC_LOG_INFO(("Will not accept connections because we do "
2006 "not have backup router connection established"));
2007 silc_server_disconnect_remote(server, sock,
2008 SILC_STATUS_ERR_PERM_DENIED,
2009 "We do not have connection to backup "
2010 "router established, try later");
2011 silc_free(sock->user_data);
2012 server->stat.auth_failures++;
2014 /* From here on, wait 10 seconds for the backup router to appear. */
2015 silc_schedule_task_add(server->schedule, 0,
2016 silc_server_backup_router_wait,
2017 (void *)server, 10, 0,
2018 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2023 SILC_LOG_DEBUG(("Remote host is %s",
2024 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2025 "server" : (backup_router ?
2026 "backup router" : "router")));
2027 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2028 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2029 "server" : (backup_router ?
2030 "backup router" : "router")));
2032 /* Add the server into server cache. The server name and Server ID
2033 is updated after we have received NEW_SERVER packet from the
2034 server. We mark ourselves as router for this server if we really
2037 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2038 server->local_list : (backup_router ?
2039 server->local_list :
2040 server->global_list)),
2042 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2043 SILC_SERVER : SILC_ROUTER),
2045 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2046 server->id_entry : (backup_router ?
2047 server->id_entry : NULL)),
2050 SILC_LOG_ERROR(("Could not add new server to cache"));
2051 silc_free(sock->user_data);
2052 silc_server_disconnect_remote(server, sock,
2053 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2054 server->stat.auth_failures++;
2057 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2059 id_entry = (void *)new_server;
2061 /* If the incoming connection is router and marked as backup router
2062 then add it to be one of our backups */
2063 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2064 /* Change it back to SERVER type since that's what it really is. */
2066 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2067 new_server->server_type = SILC_BACKUP_ROUTER;
2069 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2070 ("Backup router %s is now online",
2073 /* Remove the backup waiting with timeout */
2074 silc_schedule_task_add(server->schedule, 0,
2075 silc_server_backup_router_wait,
2076 (void *)server, 5, 0,
2077 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2081 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2082 server->stat.my_servers++;
2084 server->stat.my_routers++;
2085 server->stat.routers++;
2087 server->stat.servers++;
2089 /* Check whether this connection is to be our primary router connection
2090 if we do not already have the primary route. */
2091 if (!backup_router &&
2092 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2093 if (silc_server_config_is_primary_route(server) && !initiator)
2096 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2097 server->standalone = FALSE;
2098 if (!server->id_entry->router) {
2099 server->id_entry->router = id_entry;
2100 server->router = id_entry;
2111 sock->type = ctx->conn_type;
2113 /* Add the common data structure to the ID entry. */
2114 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2116 /* Add to sockets internal pointer for fast referencing */
2117 silc_free(sock->user_data);
2118 sock->user_data = id_entry;
2120 /* Connection has been fully established now. Everything is ok. */
2121 SILC_LOG_DEBUG(("New connection authenticated"));
2123 /* Perform keepalive. */
2124 if (param->keepalive_secs)
2125 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2126 silc_server_perform_heartbeat,
2129 /* Perform Quality of Service */
2131 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2132 param->qos_limit_sec, param->qos_limit_usec,
2136 silc_schedule_task_del_by_callback(server->schedule,
2137 silc_server_failure_callback);
2138 silc_protocol_free(protocol);
2140 silc_packet_context_free(ctx->packet);
2142 silc_ske_free(ctx->ske);
2143 silc_free(ctx->dest_id);
2144 silc_server_config_unref(&ctx->cconfig);
2145 silc_server_config_unref(&ctx->sconfig);
2146 silc_server_config_unref(&ctx->rconfig);
2148 sock->protocol = NULL;
2151 /* This function is used to read packets from network and send packets to
2152 network. This is usually a generic task. */
2154 SILC_TASK_CALLBACK(silc_server_packet_process)
2156 SilcServer server = (SilcServer)context;
2157 SilcSocketConnection sock = server->sockets[fd];
2158 SilcIDListData idata;
2159 SilcCipher cipher = NULL;
2160 SilcHmac hmac = NULL;
2161 SilcUInt32 sequence = 0;
2165 SILC_LOG_DEBUG(("Unknown socket connection"));
2169 /* Packet sending */
2171 if (type == SILC_TASK_WRITE) {
2172 /* Do not send data to disconnected connection */
2173 if (SILC_IS_DISCONNECTED(sock)) {
2174 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2178 server->stat.packets_sent++;
2180 /* Send the packet */
2181 ret = silc_packet_send(sock, TRUE);
2183 /* If returned -2 could not write to connection now, will do
2189 SILC_LOG_ERROR(("Error sending packet to connection "
2190 "%s:%d [%s]", sock->hostname, sock->port,
2191 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2192 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2193 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2198 /* The packet has been sent and now it is time to set the connection
2199 back to only for input. When there is again some outgoing data
2200 available for this connection it will be set for output as well.
2201 This call clears the output setting and sets it only for input. */
2202 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2203 SILC_UNSET_OUTBUF_PENDING(sock);
2205 silc_buffer_clear(sock->outbuf);
2209 /* Packet receiving */
2211 /* Read some data from connection */
2212 ret = silc_packet_receive(sock);
2216 SILC_LOG_ERROR(("Error receiving packet from connection "
2217 "%s:%d [%s] %s", sock->hostname, sock->port,
2218 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2219 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2220 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2221 "Router"), strerror(errno)));
2227 SILC_LOG_DEBUG(("Read EOF"));
2229 /* If connection is disconnecting already we will finally
2230 close the connection */
2231 if (SILC_IS_DISCONNECTING(sock)) {
2232 if (sock->user_data)
2233 silc_server_free_sock_user_data(server, sock, NULL);
2234 silc_server_close_connection(server, sock);
2238 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2239 SILC_SET_DISCONNECTING(sock);
2241 if (sock->user_data) {
2243 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2244 silc_server_free_sock_user_data(server, sock, tmp);
2246 silc_server_free_sock_user_data(server, sock, NULL);
2247 } else if (server->router_conn && server->router_conn->sock == sock &&
2248 !server->router && server->standalone)
2249 silc_schedule_task_add(server->schedule, 0,
2250 silc_server_connect_to_router,
2253 SILC_TASK_PRI_NORMAL);
2255 silc_server_close_connection(server, sock);
2259 /* If connection is disconnecting or disconnected we will ignore
2261 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2262 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2266 /* Get keys and stuff from ID entry */
2267 idata = (SilcIDListData)sock->user_data;
2269 cipher = idata->receive_key;
2270 hmac = idata->hmac_receive;
2271 sequence = idata->psn_receive;
2274 /* Process the packet. This will call the parser that will then
2275 decrypt and parse the packet. */
2276 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2277 TRUE : FALSE, cipher, hmac, sequence,
2278 silc_server_packet_parse, server);
2280 /* If processing failed the connection is closed. */
2282 /* On packet processing errors we may close our primary router
2283 connection but won't become primary router if we are the backup
2284 since this is local error condition. */
2285 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2286 server->backup_noswitch = TRUE;
2288 if (sock->user_data)
2289 silc_server_free_sock_user_data(server, sock, NULL);
2290 silc_server_close_connection(server, sock);
2294 /* Parses whole packet, received earlier. */
2296 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2298 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2299 SilcServer server = (SilcServer)parse_ctx->context;
2300 SilcSocketConnection sock = parse_ctx->sock;
2301 SilcPacketContext *packet = parse_ctx->packet;
2302 SilcIDListData idata = (SilcIDListData)sock->user_data;
2305 server->stat.packets_received++;
2307 /* Parse the packet */
2308 if (parse_ctx->normal)
2309 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2311 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2313 /* If entry is disabled ignore what we got. */
2314 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2315 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2316 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2317 SILC_LOG_DEBUG(("Connection is disabled"));
2321 if (ret == SILC_PACKET_NONE) {
2322 SILC_LOG_DEBUG(("Error parsing packet"));
2326 /* Check that the the current client ID is same as in the client's packet. */
2327 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2328 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2329 if (client && client->id && packet->src_id) {
2330 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2331 packet->src_id_type);
2332 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2334 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2341 if (server->server_type == SILC_ROUTER) {
2342 /* Route the packet if it is not destined to us. Other ID types but
2343 server are handled separately after processing them. */
2344 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2345 packet->dst_id_type == SILC_ID_SERVER &&
2346 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2347 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2349 /* Route the packet to fastest route for the destination ID */
2350 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2351 packet->dst_id_type);
2354 silc_server_packet_route(server,
2355 silc_server_route_get(server, id,
2356 packet->dst_id_type),
2363 /* Parse the incoming packet type */
2364 silc_server_packet_parse_type(server, sock, packet);
2366 /* Broadcast packet if it is marked as broadcast packet and it is
2367 originated from router and we are router. */
2368 if (server->server_type == SILC_ROUTER &&
2369 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2370 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2371 /* Broadcast to our primary route */
2372 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2374 /* If we have backup routers then we need to feed all broadcast
2375 data to those servers. */
2376 silc_server_backup_broadcast(server, sock, packet);
2380 silc_packet_context_free(packet);
2381 silc_free(parse_ctx);
2384 /* Parser callback called by silc_packet_receive_process. This merely
2385 registers timeout that will handle the actual parsing when appropriate. */
2387 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2390 SilcServer server = (SilcServer)context;
2391 SilcSocketConnection sock = parser_context->sock;
2392 SilcIDListData idata = (SilcIDListData)sock->user_data;
2396 idata->psn_receive = parser_context->packet->sequence + 1;
2398 /* If protocol for this connection is key exchange or rekey then we'll
2399 process all packets synchronously, since there might be packets in
2400 queue that we are not able to decrypt without first processing the
2401 packets before them. */
2402 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2403 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2404 (sock->protocol && sock->protocol->protocol &&
2405 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2406 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2407 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2410 /* Reprocess data since we'll return FALSE here. This is because
2411 the idata->receive_key might have become valid in the last packet
2412 and we want to call this processor with valid cipher. */
2414 ret = silc_packet_receive_process(
2415 sock, server->server_type == SILC_ROUTER ?
2416 TRUE : FALSE, idata->receive_key,
2417 idata->hmac_receive, idata->psn_receive,
2418 silc_server_packet_parse, server);
2420 ret = silc_packet_receive_process(
2421 sock, server->server_type == SILC_ROUTER ?
2422 TRUE : FALSE, NULL, NULL, 0,
2423 silc_server_packet_parse, server);
2426 /* On packet processing errors we may close our primary router
2427 connection but won't become primary router if we are the backup
2428 since this is local error condition. */
2429 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2430 server->backup_noswitch = TRUE;
2432 if (sock->user_data)
2433 silc_server_free_sock_user_data(server, sock, NULL);
2434 silc_server_close_connection(server, sock);
2440 switch (sock->type) {
2441 case SILC_SOCKET_TYPE_UNKNOWN:
2442 case SILC_SOCKET_TYPE_CLIENT:
2443 /* Parse the packet with timeout */
2444 silc_schedule_task_add(server->schedule, sock->sock,
2445 silc_server_packet_parse_real,
2446 (void *)parser_context, 0, 100000,
2448 SILC_TASK_PRI_NORMAL);
2450 case SILC_SOCKET_TYPE_SERVER:
2451 case SILC_SOCKET_TYPE_ROUTER:
2452 /* Packets from servers are parsed immediately */
2453 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2463 /* Parses the packet type and calls what ever routines the packet type
2464 requires. This is done for all incoming packets. */
2466 void silc_server_packet_parse_type(SilcServer server,
2467 SilcSocketConnection sock,
2468 SilcPacketContext *packet)
2470 SilcPacketType type = packet->type;
2471 SilcIDListData idata = (SilcIDListData)sock->user_data;
2473 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2474 silc_get_packet_name(type), packet->flags));
2476 /* Parse the packet type */
2478 case SILC_PACKET_DISCONNECT:
2481 char *message = NULL;
2483 if (packet->flags & SILC_PACKET_FLAG_LIST)
2485 if (packet->buffer->len < 1)
2488 status = (SilcStatus)packet->buffer->data[0];
2489 if (packet->buffer->len > 1 &&
2490 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2491 message = silc_memdup(packet->buffer->data + 1,
2492 packet->buffer->len - 1);
2494 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2495 sock->ip, sock->hostname,
2496 silc_get_status_message(status), status,
2497 message ? message : ""));
2500 /* Handle the disconnection from our end too */
2501 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2502 silc_server_free_sock_user_data(server, sock, NULL);
2503 silc_server_close_connection(server, sock);
2507 case SILC_PACKET_SUCCESS:
2509 * Success received for something. For now we can have only
2510 * one protocol for connection executing at once hence this
2511 * success message is for whatever protocol is executing currently.
2513 if (packet->flags & SILC_PACKET_FLAG_LIST)
2516 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2519 case SILC_PACKET_FAILURE:
2521 * Failure received for something. For now we can have only
2522 * one protocol for connection executing at once hence this
2523 * failure message is for whatever protocol is executing currently.
2525 if (packet->flags & SILC_PACKET_FLAG_LIST)
2527 if (sock->protocol) {
2528 SilcServerFailureContext f;
2529 f = silc_calloc(1, sizeof(*f));
2530 f->sock = silc_socket_dup(sock);
2532 /* We will wait 5 seconds to process this failure packet */
2533 silc_schedule_task_add(server->schedule, sock->sock,
2534 silc_server_failure_callback, (void *)f, 5, 0,
2535 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2539 case SILC_PACKET_REJECT:
2540 if (packet->flags & SILC_PACKET_FLAG_LIST)
2545 case SILC_PACKET_NOTIFY:
2547 * Received notify packet. Server can receive notify packets from
2548 * router. Server then relays the notify messages to clients if needed.
2550 if (packet->flags & SILC_PACKET_FLAG_LIST)
2551 silc_server_notify_list(server, sock, packet);
2553 silc_server_notify(server, sock, packet);
2559 case SILC_PACKET_CHANNEL_MESSAGE:
2561 * Received channel message. Channel messages are special packets
2562 * (although probably most common ones) thus they are handled
2565 if (packet->flags & SILC_PACKET_FLAG_LIST)
2567 idata->last_receive = time(NULL);
2568 silc_server_channel_message(server, sock, packet);
2571 case SILC_PACKET_CHANNEL_KEY:
2573 * Received key for channel. As channels are created by the router
2574 * the keys are as well. We will distribute the key to all of our
2575 * locally connected clients on the particular channel. Router
2576 * never receives this channel and thus is ignored.
2578 if (packet->flags & SILC_PACKET_FLAG_LIST)
2580 silc_server_channel_key(server, sock, packet);
2586 case SILC_PACKET_COMMAND:
2588 * Recived command. Processes the command request and allocates the
2589 * command context and calls the command.
2591 if (packet->flags & SILC_PACKET_FLAG_LIST)
2593 silc_server_command_process(server, sock, packet);
2596 case SILC_PACKET_COMMAND_REPLY:
2598 * Received command reply packet. Received command reply to command. It
2599 * may be reply to command sent by us or reply to command sent by client
2600 * that we've routed further.
2602 if (packet->flags & SILC_PACKET_FLAG_LIST)
2604 silc_server_command_reply(server, sock, packet);
2608 * Private Message packets
2610 case SILC_PACKET_PRIVATE_MESSAGE:
2612 * Received private message packet. The packet is coming from either
2615 if (packet->flags & SILC_PACKET_FLAG_LIST)
2617 idata->last_receive = time(NULL);
2618 silc_server_private_message(server, sock, packet);
2621 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2623 * Private message key packet.
2625 if (packet->flags & SILC_PACKET_FLAG_LIST)
2627 silc_server_private_message_key(server, sock, packet);
2631 * Key Exchange protocol packets
2633 case SILC_PACKET_KEY_EXCHANGE:
2634 if (packet->flags & SILC_PACKET_FLAG_LIST)
2637 if (sock->protocol && sock->protocol->protocol &&
2638 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2639 SilcServerKEInternalContext *proto_ctx =
2640 (SilcServerKEInternalContext *)sock->protocol->context;
2642 proto_ctx->packet = silc_packet_context_dup(packet);
2644 /* Let the protocol handle the packet */
2645 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2647 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2648 "protocol active, packet dropped."));
2652 case SILC_PACKET_KEY_EXCHANGE_1:
2653 if (packet->flags & SILC_PACKET_FLAG_LIST)
2656 if (sock->protocol && sock->protocol->protocol &&
2657 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2658 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2660 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2661 SilcServerRekeyInternalContext *proto_ctx =
2662 (SilcServerRekeyInternalContext *)sock->protocol->context;
2664 if (proto_ctx->packet)
2665 silc_packet_context_free(proto_ctx->packet);
2667 proto_ctx->packet = silc_packet_context_dup(packet);
2669 /* Let the protocol handle the packet */
2670 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2672 SilcServerKEInternalContext *proto_ctx =
2673 (SilcServerKEInternalContext *)sock->protocol->context;
2675 if (proto_ctx->packet)
2676 silc_packet_context_free(proto_ctx->packet);
2678 proto_ctx->packet = silc_packet_context_dup(packet);
2679 proto_ctx->dest_id_type = packet->src_id_type;
2680 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2681 packet->src_id_type);
2682 if (!proto_ctx->dest_id)
2685 /* Let the protocol handle the packet */
2686 silc_protocol_execute(sock->protocol, server->schedule,
2690 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2691 "protocol active, packet dropped."));
2695 case SILC_PACKET_KEY_EXCHANGE_2:
2696 if (packet->flags & SILC_PACKET_FLAG_LIST)
2699 if (sock->protocol && sock->protocol->protocol &&
2700 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2701 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2703 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2704 SilcServerRekeyInternalContext *proto_ctx =
2705 (SilcServerRekeyInternalContext *)sock->protocol->context;
2707 if (proto_ctx->packet)
2708 silc_packet_context_free(proto_ctx->packet);
2710 proto_ctx->packet = silc_packet_context_dup(packet);
2712 /* Let the protocol handle the packet */
2713 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2715 SilcServerKEInternalContext *proto_ctx =
2716 (SilcServerKEInternalContext *)sock->protocol->context;
2718 if (proto_ctx->packet)
2719 silc_packet_context_free(proto_ctx->packet);
2721 proto_ctx->packet = silc_packet_context_dup(packet);
2722 proto_ctx->dest_id_type = packet->src_id_type;
2723 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2724 packet->src_id_type);
2725 if (!proto_ctx->dest_id)
2728 /* Let the protocol handle the packet */
2729 silc_protocol_execute(sock->protocol, server->schedule,
2733 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2734 "protocol active, packet dropped."));
2738 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2740 * Connection authentication request packet. When we receive this packet
2741 * we will send to the other end information about our mandatory
2742 * authentication method for the connection. This packet maybe received
2745 if (packet->flags & SILC_PACKET_FLAG_LIST)
2747 silc_server_connection_auth_request(server, sock, packet);
2751 * Connection Authentication protocol packets
2753 case SILC_PACKET_CONNECTION_AUTH:
2754 /* Start of the authentication protocol. We receive here the
2755 authentication data and will verify it. */
2756 if (packet->flags & SILC_PACKET_FLAG_LIST)
2759 if (sock->protocol && sock->protocol->protocol->type
2760 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2762 SilcServerConnAuthInternalContext *proto_ctx =
2763 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2765 proto_ctx->packet = silc_packet_context_dup(packet);
2767 /* Let the protocol handle the packet */
2768 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2770 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2771 "protocol active, packet dropped."));
2775 case SILC_PACKET_NEW_ID:
2777 * Received New ID packet. This includes some new ID that has been
2778 * created. It may be for client, server or channel. This is the way
2779 * to distribute information about new registered entities in the
2782 if (packet->flags & SILC_PACKET_FLAG_LIST)
2783 silc_server_new_id_list(server, sock, packet);
2785 silc_server_new_id(server, sock, packet);
2788 case SILC_PACKET_NEW_CLIENT:
2790 * Received new client packet. This includes client information that
2791 * we will use to create initial client ID. After creating new
2792 * ID we will send it to the client.
2794 if (packet->flags & SILC_PACKET_FLAG_LIST)
2796 silc_server_new_client(server, sock, packet);
2799 case SILC_PACKET_NEW_SERVER:
2801 * Received new server packet. This includes Server ID and some other
2802 * information that we may save. This is received after server has
2805 if (packet->flags & SILC_PACKET_FLAG_LIST)
2807 silc_server_new_server(server, sock, packet);
2810 case SILC_PACKET_NEW_CHANNEL:
2812 * Received new channel packet. Information about new channel in the
2813 * network are distributed using this packet.
2815 if (packet->flags & SILC_PACKET_FLAG_LIST)
2816 silc_server_new_channel_list(server, sock, packet);
2818 silc_server_new_channel(server, sock, packet);
2821 case SILC_PACKET_HEARTBEAT:
2823 * Received heartbeat.
2825 if (packet->flags & SILC_PACKET_FLAG_LIST)
2829 case SILC_PACKET_KEY_AGREEMENT:
2831 * Received heartbeat.
2833 if (packet->flags & SILC_PACKET_FLAG_LIST)
2835 silc_server_key_agreement(server, sock, packet);
2838 case SILC_PACKET_REKEY:
2840 * Received re-key packet. The sender wants to regenerate the session
2843 if (packet->flags & SILC_PACKET_FLAG_LIST)
2845 silc_server_rekey(server, sock, packet);
2848 case SILC_PACKET_REKEY_DONE:
2850 * The re-key is done.
2852 if (packet->flags & SILC_PACKET_FLAG_LIST)
2855 if (sock->protocol && sock->protocol->protocol &&
2856 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2858 SilcServerRekeyInternalContext *proto_ctx =
2859 (SilcServerRekeyInternalContext *)sock->protocol->context;
2861 if (proto_ctx->packet)
2862 silc_packet_context_free(proto_ctx->packet);
2864 proto_ctx->packet = silc_packet_context_dup(packet);
2866 /* Let the protocol handle the packet */
2867 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2869 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2870 "protocol active, packet dropped."));
2874 case SILC_PACKET_FTP:
2876 if (packet->flags & SILC_PACKET_FLAG_LIST)
2878 silc_server_ftp(server, sock, packet);
2881 case SILC_PACKET_RESUME_CLIENT:
2883 if (packet->flags & SILC_PACKET_FLAG_LIST)
2885 silc_server_resume_client(server, sock, packet);
2888 case SILC_PACKET_RESUME_ROUTER:
2889 /* Resume router packet received. This packet is received for backup
2890 router resuming protocol. */
2891 if (packet->flags & SILC_PACKET_FLAG_LIST)
2893 silc_server_backup_resume_router(server, sock, packet);
2897 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2902 /* Creates connection to a remote router. */
2904 void silc_server_create_connection(SilcServer server,
2905 const char *remote_host, SilcUInt32 port)
2907 SilcServerConnection sconn;
2909 /* Allocate connection object for hold connection specific stuff. */
2910 sconn = silc_calloc(1, sizeof(*sconn));
2911 sconn->remote_host = strdup(remote_host);
2912 sconn->remote_port = port;
2913 sconn->no_reconnect = TRUE;
2915 silc_schedule_task_add(server->schedule, 0,
2916 silc_server_connect_router,
2917 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2918 SILC_TASK_PRI_NORMAL);
2921 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2923 silc_socket_free(context);
2926 /* Closes connection to socket connection */
2928 void silc_server_close_connection(SilcServer server,
2929 SilcSocketConnection sock)
2933 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2934 silc_schedule_task_add(server->schedule, 0,
2935 silc_server_close_connection_final,
2936 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2937 SILC_TASK_PRI_NORMAL);
2941 memset(tmp, 0, sizeof(tmp));
2942 silc_socket_get_error(sock, tmp, sizeof(tmp));
2943 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2945 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2946 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2947 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2948 "Router"), tmp[0] ? tmp : ""));
2950 /* We won't listen for this connection anymore */
2951 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2953 /* Unregister all tasks */
2954 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2956 /* Close the actual connection */
2957 silc_net_close_connection(sock->sock);
2958 server->sockets[sock->sock] = NULL;
2960 /* If sock->user_data is NULL then we'll check for active protocols
2961 here since the silc_server_free_sock_user_data has not been called
2962 for this connection. */
2963 if (!sock->user_data) {
2964 /* If any protocol is active cancel its execution. It will call
2965 the final callback which will finalize the disconnection. */
2966 if (sock->protocol) {
2967 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2968 silc_protocol_cancel(sock->protocol, server->schedule);
2969 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2970 silc_protocol_execute_final(sock->protocol, server->schedule);
2971 sock->protocol = NULL;
2976 silc_schedule_task_add(server->schedule, 0,
2977 silc_server_close_connection_final,
2978 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2979 SILC_TASK_PRI_NORMAL);
2982 /* Sends disconnect message to remote connection and disconnects the
2985 void silc_server_disconnect_remote(SilcServer server,
2986 SilcSocketConnection sock,
2987 SilcStatus status, ...)
2990 unsigned char buf[512];
2995 if (!sock || SILC_IS_DISCONNECTED(sock))
2998 memset(buf, 0, sizeof(buf));
2999 va_start(ap, status);
3000 cp = va_arg(ap, char *);
3002 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3007 SILC_LOG_DEBUG(("Disconnecting remote host"));
3009 /* Notify remote end that the conversation is over. The notify message
3010 is tried to be sent immediately. */
3014 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3016 buffer = silc_buffer_alloc_size(len);
3020 buffer->data[0] = status;
3022 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3024 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3025 buffer->data, buffer->len, TRUE);
3026 silc_buffer_free(buffer);
3029 silc_server_packet_queue_purge(server, sock);
3031 /* Mark the connection to be disconnected */
3032 SILC_SET_DISCONNECTED(sock);
3033 silc_server_close_connection(server, sock);
3036 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3038 SilcServer server = app_context;
3039 SilcClientEntry client = context;
3041 assert(!silc_hash_table_count(client->channels));
3043 silc_idlist_del_data(client);
3044 silc_idcache_purge_by_context(server->local_list->clients, client);
3047 /* Frees client data and notifies about client's signoff. */
3049 void silc_server_free_client_data(SilcServer server,
3050 SilcSocketConnection sock,
3051 SilcClientEntry client,
3053 const char *signoff)
3055 SILC_LOG_DEBUG(("Freeing client data"));
3057 /* If there is pending outgoing data for the client then purge it
3058 to the network before removing the client entry. */
3059 silc_server_packet_queue_purge(server, sock);
3062 /* Check if anyone is watching this nickname */
3063 if (server->server_type == SILC_ROUTER)
3064 silc_server_check_watcher_list(server, client, NULL,
3065 SILC_NOTIFY_TYPE_SIGNOFF);
3067 /* Send SIGNOFF notify to routers. */
3069 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3070 SILC_BROADCAST(server), client->id,
3074 /* Remove client from all channels */
3076 silc_server_remove_from_channels(server, NULL, client,
3077 TRUE, (char *)signoff, TRUE);
3079 silc_server_remove_from_channels(server, NULL, client,
3080 FALSE, NULL, FALSE);
3082 /* Remove this client from watcher list if it is */
3083 silc_server_del_from_watcher_list(server, client);
3085 /* Update statistics */
3086 server->stat.my_clients--;
3087 server->stat.clients--;
3088 if (server->stat.cell_clients)
3089 server->stat.cell_clients--;
3090 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3091 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3092 silc_schedule_task_del_by_context(server->schedule, client);
3094 /* We will not delete the client entry right away. We will take it
3095 into history (for WHOWAS command) for 5 minutes, unless we're
3096 shutting down server. */
3097 if (!server->server_shutdown) {
3098 silc_schedule_task_add(server->schedule, 0,
3099 silc_server_free_client_data_timeout,
3101 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3102 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3103 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3105 client->router = NULL;
3106 client->connection = NULL;
3108 /* Delete directly since we're shutting down server */
3109 silc_idlist_del_data(client);
3110 silc_idlist_del_client(server->local_list, client);
3114 /* Frees user_data pointer from socket connection object. This also sends
3115 appropriate notify packets to the network to inform about leaving
3118 void silc_server_free_sock_user_data(SilcServer server,
3119 SilcSocketConnection sock,
3120 const char *signoff_message)
3122 switch (sock->type) {
3123 case SILC_SOCKET_TYPE_CLIENT:
3125 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3126 silc_server_free_client_data(server, sock, user_data, TRUE,
3130 case SILC_SOCKET_TYPE_SERVER:
3131 case SILC_SOCKET_TYPE_ROUTER:
3133 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3134 SilcServerEntry backup_router = NULL;
3136 SILC_LOG_DEBUG(("Freeing server data"));
3139 backup_router = silc_server_backup_get(server, user_data->id);
3141 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3142 backup_router == server->id_entry &&
3143 sock->type != SILC_SOCKET_TYPE_ROUTER)
3144 backup_router = NULL;
3146 if (server->server_shutdown || server->backup_noswitch)
3147 backup_router = NULL;
3149 /* If this was our primary router connection then we're lost to
3150 the outside world. */
3151 if (server->router == user_data) {
3152 /* Check whether we have a backup router connection */
3153 if (!backup_router || backup_router == user_data) {
3154 silc_schedule_task_add(server->schedule, 0,
3155 silc_server_connect_to_router,
3158 SILC_TASK_PRI_NORMAL);
3160 server->id_entry->router = NULL;
3161 server->router = NULL;
3162 server->standalone = TRUE;
3163 backup_router = NULL;
3165 if (server->id_entry != backup_router) {
3166 SILC_LOG_INFO(("New primary router is backup router %s",
3167 backup_router->server_name));
3168 server->id_entry->router = backup_router;
3169 server->router = backup_router;
3170 server->router_connect = time(0);
3171 server->backup_primary = TRUE;
3173 SILC_LOG_INFO(("We are now new primary router in this cell"));
3174 server->id_entry->router = NULL;
3175 server->router = NULL;
3176 server->standalone = TRUE;
3178 /* We stop here to take a breath */
3182 if (server->server_type == SILC_BACKUP_ROUTER) {
3183 server->server_type = SILC_ROUTER;
3185 /* We'll need to constantly try to reconnect to the primary
3186 router so that we'll see when it comes back online. */
3187 silc_server_backup_reconnect(server, sock->ip, sock->port,
3188 silc_server_backup_connected,
3192 /* Mark this connection as replaced */
3193 silc_server_backup_replaced_add(server, user_data->id,
3196 } else if (backup_router) {
3197 SILC_LOG_INFO(("Enabling the use of backup router %s",
3198 backup_router->server_name));
3199 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3200 backup_router->server_name));
3202 /* Mark this connection as replaced */
3203 silc_server_backup_replaced_add(server, user_data->id,
3205 } else if (server->server_type == SILC_SERVER &&
3206 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3207 /* Reconnect to the router (backup) */
3208 silc_schedule_task_add(server->schedule, 0,
3209 silc_server_connect_to_router,
3212 SILC_TASK_PRI_NORMAL);
3215 if (!backup_router) {
3216 /* Remove all servers that are originated from this server, and
3217 remove the clients of those servers too. */
3218 silc_server_remove_servers_by_server(server, user_data, TRUE);
3220 /* Remove the clients that this server owns as they will become
3221 invalid now too. For backup router the server is actually
3222 coming from the primary router, so mark that as the owner
3224 if (server->server_type == SILC_BACKUP_ROUTER &&
3225 sock->type == SILC_SOCKET_TYPE_SERVER)
3226 silc_server_remove_clients_by_server(server, server->router,
3229 silc_server_remove_clients_by_server(server, user_data,
3232 /* Remove channels owned by this server */
3233 if (server->server_type == SILC_SERVER)
3234 silc_server_remove_channels_by_server(server, user_data);
3236 /* Enable local server connections that may be disabled */
3237 silc_server_local_servers_toggle_enabled(server, TRUE);
3239 /* Update the client entries of this server to the new backup
3240 router. If we are the backup router we also resolve the real
3241 servers for the clients. After updating is over this also
3242 removes the clients that this server explicitly owns. */
3243 silc_server_update_clients_by_server(server, user_data,
3244 backup_router, TRUE);
3246 /* If we are router and just lost our primary router (now standlaone)
3247 we remove everything that was behind it, since we don't know
3249 if (server->server_type == SILC_ROUTER && server->standalone)
3250 /* Remove all servers that are originated from this server, and
3251 remove the clients of those servers too. */
3252 silc_server_remove_servers_by_server(server, user_data, TRUE);
3254 /* Finally remove the clients that are explicitly owned by this
3255 server. They go down with the server. */
3256 silc_server_remove_clients_by_server(server, user_data,
3259 /* Update our server cache to use the new backup router too. */
3260 silc_server_update_servers_by_server(server, user_data, backup_router);
3261 if (server->server_type == SILC_SERVER)
3262 silc_server_update_channels_by_server(server, user_data,
3265 /* Send notify about primary router going down to local operators */
3266 if (server->backup_router)
3267 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3268 SILC_NOTIFY_TYPE_NONE,
3269 ("%s switched to backup router %s "
3270 "(we are primary router now)",
3271 server->server_name, server->server_name));
3272 else if (server->router)
3273 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3274 SILC_NOTIFY_TYPE_NONE,
3275 ("%s switched to backup router %s",
3276 server->server_name,
3277 server->router->server_name));
3279 server->backup_noswitch = FALSE;
3281 /* Free the server entry */
3282 silc_server_backup_del(server, user_data);
3283 silc_server_backup_replaced_del(server, user_data);
3284 silc_idlist_del_data(user_data);
3285 if (!silc_idlist_del_server(server->local_list, user_data))
3286 silc_idlist_del_server(server->global_list, user_data);
3287 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3288 server->stat.my_servers--;
3290 server->stat.my_routers--;
3291 server->stat.routers--;
3293 server->stat.servers--;
3294 if (server->server_type == SILC_ROUTER)
3295 server->stat.cell_servers--;
3297 if (backup_router && backup_router != server->id_entry) {
3298 /* Announce all of our stuff that was created about 5 minutes ago.
3299 The backup router knows all the other stuff already. */
3300 if (server->server_type == SILC_ROUTER)
3301 silc_server_announce_servers(server, FALSE, time(0) - 300,
3302 backup_router->connection);
3304 /* Announce our clients and channels to the router */
3305 silc_server_announce_clients(server, time(0) - 300,
3306 backup_router->connection);
3307 silc_server_announce_channels(server, time(0) - 300,
3308 backup_router->connection);
3314 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3316 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3318 silc_idlist_del_data(user_data);
3319 silc_free(user_data);
3324 /* If any protocol is active cancel its execution */
3325 if (sock->protocol) {
3326 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3327 silc_protocol_cancel(sock->protocol, server->schedule);
3328 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3329 silc_protocol_execute_final(sock->protocol, server->schedule);
3330 sock->protocol = NULL;
3333 sock->user_data = NULL;
3336 /* Removes client from all channels it has joined. This is used when client
3337 connection is disconnected. If the client on a channel is last, the
3338 channel is removed as well. This sends the SIGNOFF notify types. */
3340 void silc_server_remove_from_channels(SilcServer server,
3341 SilcSocketConnection sock,
3342 SilcClientEntry client,
3344 const char *signoff_message,
3347 SilcChannelEntry channel;
3348 SilcChannelClientEntry chl;
3349 SilcHashTableList htl;
3350 SilcBuffer clidp = NULL;
3355 SILC_LOG_DEBUG(("Removing client from joined channels"));
3357 if (notify && !client->id)
3361 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3366 /* Remove the client from all channels. The client is removed from
3367 the channels' user list. */
3368 silc_hash_table_list(client->channels, &htl);
3369 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3370 channel = chl->channel;
3372 /* Remove channel if this is last client leaving the channel, unless
3373 the channel is permanent. */
3374 if (server->server_type != SILC_SERVER &&
3375 silc_hash_table_count(channel->user_list) < 2) {
3376 silc_server_channel_delete(server, channel);
3380 silc_hash_table_del(client->channels, channel);
3381 silc_hash_table_del(channel->user_list, client);
3382 channel->user_count--;
3384 /* If there is no global users on the channel anymore mark the channel
3385 as local channel. Do not check if the removed client is local client. */
3386 if (server->server_type == SILC_SERVER && channel->global_users &&
3387 chl->client->router && !silc_server_channel_has_global(channel))
3388 channel->global_users = FALSE;
3390 memset(chl, 'A', sizeof(*chl));
3393 /* Update statistics */
3394 if (SILC_IS_LOCAL(client))
3395 server->stat.my_chanclients--;
3396 if (server->server_type == SILC_ROUTER) {
3397 server->stat.cell_chanclients--;
3398 server->stat.chanclients--;
3401 /* If there is not at least one local user on the channel then we don't
3402 need the channel entry anymore, we can remove it safely, unless the
3403 channel is permanent channel */
3404 if (server->server_type == SILC_SERVER &&
3405 !silc_server_channel_has_local(channel)) {
3406 /* Notify about leaving client if this channel has global users. */
3407 if (notify && channel->global_users)
3408 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3409 SILC_NOTIFY_TYPE_SIGNOFF,
3410 signoff_message ? 2 : 1,
3411 clidp->data, clidp->len,
3412 signoff_message, signoff_message ?
3413 strlen(signoff_message) : 0);
3415 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3416 silc_server_channel_delete(server, channel);
3420 /* Send notify to channel about client leaving SILC and channel too */
3422 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3423 SILC_NOTIFY_TYPE_SIGNOFF,
3424 signoff_message ? 2 : 1,
3425 clidp->data, clidp->len,
3426 signoff_message, signoff_message ?
3427 strlen(signoff_message) : 0);
3429 /* Don't create keys if we are shutting down */
3430 if (server->server_shutdown)
3433 /* Re-generate channel key if needed */
3434 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3435 if (!silc_server_create_channel_key(server, channel, 0))
3438 /* Send the channel key to the channel. The key of course is not sent
3439 to the client who was removed from the channel. */
3440 silc_server_send_channel_key(server, client->connection, channel,
3441 server->server_type == SILC_ROUTER ?
3442 FALSE : !server->standalone);
3446 silc_hash_table_list_reset(&htl);
3448 silc_buffer_free(clidp);
3451 /* Removes client from one channel. This is used for example when client
3452 calls LEAVE command to remove itself from the channel. Returns TRUE
3453 if channel still exists and FALSE if the channel is removed when
3454 last client leaves the channel. If `notify' is FALSE notify messages
3457 bool silc_server_remove_from_one_channel(SilcServer server,
3458 SilcSocketConnection sock,
3459 SilcChannelEntry channel,
3460 SilcClientEntry client,
3463 SilcChannelClientEntry chl;
3466 SILC_LOG_DEBUG(("Removing %s from channel %s",
3467 silc_id_render(client->id, SILC_ID_CLIENT),
3468 channel->channel_name));
3470 /* Get the entry to the channel, if this client is not on the channel
3472 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3475 /* Remove channel if this is last client leaving the channel, unless
3476 the channel is permanent. */
3477 if (server->server_type != SILC_SERVER &&
3478 silc_hash_table_count(channel->user_list) < 2) {
3479 silc_server_channel_delete(server, channel);
3483 silc_hash_table_del(client->channels, channel);
3484 silc_hash_table_del(channel->user_list, client);
3485 channel->user_count--;
3487 /* If there is no global users on the channel anymore mark the channel
3488 as local channel. Do not check if the client is local client. */
3489 if (server->server_type == SILC_SERVER && channel->global_users &&
3490 chl->client->router && !silc_server_channel_has_global(channel))
3491 channel->global_users = FALSE;
3493 memset(chl, 'O', sizeof(*chl));
3496 /* Update statistics */
3497 if (SILC_IS_LOCAL(client))
3498 server->stat.my_chanclients--;
3499 if (server->server_type == SILC_ROUTER) {
3500 server->stat.cell_chanclients--;
3501 server->stat.chanclients--;
3504 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3508 /* If there is not at least one local user on the channel then we don't
3509 need the channel entry anymore, we can remove it safely, unless the
3510 channel is permanent channel */
3511 if (server->server_type == SILC_SERVER &&
3512 !silc_server_channel_has_local(channel)) {
3513 /* Notify about leaving client if this channel has global users. */
3514 if (notify && channel->global_users)
3515 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3516 SILC_NOTIFY_TYPE_LEAVE, 1,
3517 clidp->data, clidp->len);
3519 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3520 silc_server_channel_delete(server, channel);
3521 silc_buffer_free(clidp);
3525 /* Send notify to channel about client leaving the channel */
3527 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3528 SILC_NOTIFY_TYPE_LEAVE, 1,
3529 clidp->data, clidp->len);
3531 silc_buffer_free(clidp);
3535 /* Timeout callback. This is called if connection is idle or for some
3536 other reason is not responding within some period of time. This
3537 disconnects the remote end. */
3539 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3541 SilcServer server = (SilcServer)context;
3542 SilcSocketConnection sock = server->sockets[fd];
3543 SilcProtocolType protocol = 0;
3545 SILC_LOG_DEBUG(("Start"));
3550 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3551 sock->hostname, sock->ip));
3553 /* If we have protocol active we must assure that we call the protocol's
3554 final callback so that all the memory is freed. */
3555 if (sock->protocol) {
3556 protocol = sock->protocol->protocol->type;
3557 silc_protocol_cancel(sock->protocol, server->schedule);
3558 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3559 silc_protocol_execute_final(sock->protocol, server->schedule);
3560 sock->protocol = NULL;
3564 silc_server_disconnect_remote(server, sock,
3566 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3567 SILC_STATUS_ERR_AUTH_FAILED :
3568 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3569 "Connection timeout");
3571 if (sock->user_data)
3572 silc_server_free_sock_user_data(server, sock, NULL);
3575 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3576 function may be used only by router. In real SILC network all channels
3577 are created by routers thus this function is never used by normal
3580 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3581 SilcServerID *router_id,
3587 SilcChannelID *channel_id;
3588 SilcChannelEntry entry;
3592 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3595 cipher = SILC_DEFAULT_CIPHER;
3597 hmac = SILC_DEFAULT_HMAC;
3599 /* Allocate cipher */
3600 if (!silc_cipher_alloc(cipher, &key))
3604 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3605 silc_cipher_free(key);
3609 channel_name = strdup(channel_name);
3611 /* Create the channel ID */
3612 if (!silc_id_create_channel_id(server, router_id, server->rng,
3614 silc_free(channel_name);
3615 silc_cipher_free(key);
3616 silc_hmac_free(newhmac);
3620 /* Create the channel */
3621 entry = silc_idlist_add_channel(server->local_list, channel_name,
3622 SILC_CHANNEL_MODE_NONE, channel_id,
3623 NULL, key, newhmac, 0);
3625 silc_free(channel_name);
3626 silc_cipher_free(key);
3627 silc_hmac_free(newhmac);
3628 silc_free(channel_id);
3632 entry->cipher = strdup(cipher);
3633 entry->hmac_name = strdup(hmac);
3635 /* Now create the actual key material */
3636 if (!silc_server_create_channel_key(server, entry,
3637 silc_cipher_get_key_len(key) / 8)) {
3638 silc_idlist_del_channel(server->local_list, entry);
3642 /* Notify other routers about the new channel. We send the packet
3643 to our primary route. */
3645 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3646 channel_name, entry->id,
3647 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3650 /* Distribute to backup routers */
3651 if (broadcast && server->server_type == SILC_ROUTER) {
3654 SilcUInt32 name_len = strlen(channel_name);
3655 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3656 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3658 packet = silc_channel_payload_encode(channel_name, name_len,
3659 cid, channel_id_len, entry->mode);
3660 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3661 packet->data, packet->len, FALSE, TRUE);
3663 silc_buffer_free(packet);
3666 server->stat.my_channels++;
3667 if (server->server_type == SILC_ROUTER) {
3668 server->stat.channels++;
3669 server->stat.cell_channels++;
3670 entry->users_resolved = TRUE;
3676 /* Same as above but creates the channel with Channel ID `channel_id. */
3679 silc_server_create_new_channel_with_id(SilcServer server,
3683 SilcChannelID *channel_id,
3686 SilcChannelEntry entry;
3690 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3693 cipher = SILC_DEFAULT_CIPHER;
3695 hmac = SILC_DEFAULT_HMAC;
3697 /* Allocate cipher */
3698 if (!silc_cipher_alloc(cipher, &key))
3702 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3703 silc_cipher_free(key);
3707 channel_name = strdup(channel_name);
3709 /* Create the channel */
3710 entry = silc_idlist_add_channel(server->local_list, channel_name,
3711 SILC_CHANNEL_MODE_NONE, channel_id,
3712 NULL, key, newhmac, 0);
3714 silc_cipher_free(key);
3715 silc_hmac_free(newhmac);
3716 silc_free(channel_name);
3720 /* Now create the actual key material */
3721 if (!silc_server_create_channel_key(server, entry,
3722 silc_cipher_get_key_len(key) / 8)) {
3723 silc_idlist_del_channel(server->local_list, entry);
3727 /* Notify other routers about the new channel. We send the packet
3728 to our primary route. */
3730 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3731 channel_name, entry->id,
3732 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3735 /* Distribute to backup routers */
3736 if (broadcast && server->server_type == SILC_ROUTER) {
3739 SilcUInt32 name_len = strlen(channel_name);
3740 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3741 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3743 packet = silc_channel_payload_encode(channel_name, name_len,
3744 cid, channel_id_len, entry->mode);
3745 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3746 packet->data, packet->len, FALSE, TRUE);
3748 silc_buffer_free(packet);
3751 server->stat.my_channels++;
3752 if (server->server_type == SILC_ROUTER) {
3753 server->stat.channels++;
3754 server->stat.cell_channels++;
3755 entry->users_resolved = TRUE;
3761 /* Channel's key re-key timeout callback. */
3763 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3765 SilcServer server = app_context;
3766 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3770 /* Return now if we are shutting down */
3771 if (server->server_shutdown)
3774 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3777 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3780 /* Generates new channel key. This is used to create the initial channel key
3781 but also to re-generate new key for channel. If `key_len' is provided
3782 it is the bytes of the key length. */
3784 bool silc_server_create_channel_key(SilcServer server,
3785 SilcChannelEntry channel,
3789 unsigned char channel_key[32], hash[32];
3792 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3793 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3797 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3799 if (!channel->channel_key)
3800 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3801 channel->channel_key = NULL;
3807 else if (channel->key_len)
3808 len = channel->key_len / 8;
3810 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3812 /* Create channel key */
3813 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3816 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3818 /* Remove old key if exists */
3820 memset(channel->key, 0, channel->key_len / 8);
3821 silc_free(channel->key);
3825 channel->key_len = len * 8;
3826 channel->key = silc_memdup(channel_key, len);
3827 memset(channel_key, 0, sizeof(channel_key));
3829 /* Generate HMAC key from the channel key data and set it */
3831 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3832 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3833 silc_hmac_set_key(channel->hmac, hash,
3834 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3835 memset(hash, 0, sizeof(hash));
3837 if (server->server_type == SILC_ROUTER) {
3838 if (!channel->rekey)
3839 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3840 channel->rekey->channel = channel;
3841 channel->rekey->key_len = key_len;
3842 if (channel->rekey->task)
3843 silc_schedule_task_del(server->schedule, channel->rekey->task);
3845 channel->rekey->task =
3846 silc_schedule_task_add(server->schedule, 0,
3847 silc_server_channel_key_rekey,
3848 (void *)channel->rekey,
3849 server->config->channel_rekey_secs, 0,
3851 SILC_TASK_PRI_NORMAL);
3857 /* Saves the channel key found in the encoded `key_payload' buffer. This
3858 function is used when we receive Channel Key Payload and also when we're
3859 processing JOIN command reply. Returns entry to the channel. */
3861 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3862 SilcBuffer key_payload,
3863 SilcChannelEntry channel)
3865 SilcChannelKeyPayload payload = NULL;
3866 SilcChannelID *id = NULL;
3867 unsigned char *tmp, hash[32];
3871 /* Decode channel key payload */
3872 payload = silc_channel_key_payload_parse(key_payload->data,
3875 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3880 /* Get the channel entry */
3883 /* Get channel ID */
3884 tmp = silc_channel_key_get_id(payload, &tmp_len);
3885 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3891 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3893 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3895 if (server->server_type == SILC_ROUTER)
3896 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3897 silc_id_render(id, SILC_ID_CHANNEL)));
3903 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3905 tmp = silc_channel_key_get_key(payload, &tmp_len);
3911 cipher = silc_channel_key_get_cipher(payload, NULL);
3917 /* Remove old key if exists */
3919 memset(channel->key, 0, channel->key_len / 8);
3920 silc_free(channel->key);
3921 silc_cipher_free(channel->channel_key);
3924 /* Create new cipher */
3925 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3926 channel->channel_key = NULL;
3931 if (channel->cipher)
3932 silc_free(channel->cipher);
3933 channel->cipher = strdup(cipher);
3936 channel->key_len = tmp_len * 8;
3937 channel->key = silc_memdup(tmp, tmp_len);
3938 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3940 /* Generate HMAC key from the channel key data and set it */
3942 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3943 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3944 silc_hmac_set_key(channel->hmac, hash,
3945 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3947 memset(hash, 0, sizeof(hash));
3948 memset(tmp, 0, tmp_len);
3950 if (server->server_type == SILC_ROUTER) {
3951 if (!channel->rekey)
3952 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3953 channel->rekey->channel = channel;
3954 if (channel->rekey->task)
3955 silc_schedule_task_del(server->schedule, channel->rekey->task);
3957 channel->rekey->task =
3958 silc_schedule_task_add(server->schedule, 0,
3959 silc_server_channel_key_rekey,
3960 (void *)channel->rekey,
3961 server->config->channel_rekey_secs, 0,
3963 SILC_TASK_PRI_NORMAL);
3969 silc_channel_key_payload_free(payload);
3974 /* Heartbeat callback. This function is set as argument for the
3975 silc_socket_set_heartbeat function. The library will call this function
3976 at the set time interval. */
3978 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3981 SilcServer server = hb_context;
3983 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3984 sock->port, sock->ip));
3986 /* Send the heartbeat */
3987 silc_server_send_heartbeat(server, sock);
3990 /* Returns assembled of all servers in the given ID list. The packet's
3991 form is dictated by the New ID payload. */
3993 static void silc_server_announce_get_servers(SilcServer server,
3994 SilcServerEntry remote,
3996 SilcBuffer *servers,
3997 unsigned long creation_time)
3999 SilcIDCacheList list;
4000 SilcIDCacheEntry id_cache;
4001 SilcServerEntry entry;
4004 /* Go through all clients in the list */
4005 if (silc_idcache_get_all(id_list->servers, &list)) {
4006 if (silc_idcache_list_first(list, &id_cache)) {
4008 entry = (SilcServerEntry)id_cache->context;
4010 /* Do not announce the one we've sending our announcements and
4011 do not announce ourself. Also check the creation time if it's
4013 if ((entry == remote) || (entry == server->id_entry) ||
4014 (creation_time && entry->data.created < creation_time)) {
4015 if (!silc_idcache_list_next(list, &id_cache))
4020 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4022 *servers = silc_buffer_realloc(*servers,
4024 (*servers)->truelen + idp->len :
4026 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4027 silc_buffer_put(*servers, idp->data, idp->len);
4028 silc_buffer_pull(*servers, idp->len);
4029 silc_buffer_free(idp);
4031 if (!silc_idcache_list_next(list, &id_cache))
4036 silc_idcache_list_free(list);
4041 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4047 p = silc_notify_payload_encode(notify, argc, ap);
4053 /* This function is used by router to announce existing servers to our
4054 primary router when we've connected to it. If `creation_time' is non-zero
4055 then only the servers that has been created after the `creation_time'
4056 will be announced. */
4058 void silc_server_announce_servers(SilcServer server, bool global,
4059 unsigned long creation_time,
4060 SilcSocketConnection remote)
4062 SilcBuffer servers = NULL;
4064 SILC_LOG_DEBUG(("Announcing servers"));
4066 /* Get servers in local list */
4067 silc_server_announce_get_servers(server, remote->user_data,
4068 server->local_list, &servers,
4072 /* Get servers in global list */
4073 silc_server_announce_get_servers(server, remote->user_data,
4074 server->global_list, &servers,
4078 silc_buffer_push(servers, servers->data - servers->head);
4079 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4081 /* Send the packet */
4082 silc_server_packet_send(server, remote,
4083 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4084 servers->data, servers->len, TRUE);
4086 silc_buffer_free(servers);
4090 /* Returns assembled packet of all clients in the given ID list. The
4091 packet's form is dictated by the New ID Payload. */
4093 static void silc_server_announce_get_clients(SilcServer server,
4095 SilcBuffer *clients,
4097 unsigned long creation_time)
4099 SilcIDCacheList list;
4100 SilcIDCacheEntry id_cache;
4101 SilcClientEntry client;
4104 unsigned char mode[4];
4106 /* Go through all clients in the list */
4107 if (silc_idcache_get_all(id_list->clients, &list)) {
4108 if (silc_idcache_list_first(list, &id_cache)) {
4110 client = (SilcClientEntry)id_cache->context;
4112 if (creation_time && client->data.created < creation_time) {
4113 if (!silc_idcache_list_next(list, &id_cache))
4117 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4118 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4119 if (!silc_idcache_list_next(list, &id_cache))
4124 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4126 *clients = silc_buffer_realloc(*clients,
4128 (*clients)->truelen + idp->len :
4130 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4131 silc_buffer_put(*clients, idp->data, idp->len);
4132 silc_buffer_pull(*clients, idp->len);
4134 SILC_PUT32_MSB(client->mode, mode);
4136 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4137 2, idp->data, idp->len,
4139 *umodes = silc_buffer_realloc(*umodes,
4141 (*umodes)->truelen + tmp->len :
4143 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4144 silc_buffer_put(*umodes, tmp->data, tmp->len);
4145 silc_buffer_pull(*umodes, tmp->len);
4146 silc_buffer_free(tmp);
4148 silc_buffer_free(idp);
4150 if (!silc_idcache_list_next(list, &id_cache))
4155 silc_idcache_list_free(list);
4159 /* This function is used to announce our existing clients to our router
4160 when we've connected to it. If `creation_time' is non-zero then only
4161 the clients that has been created after the `creation_time' will be
4164 void silc_server_announce_clients(SilcServer server,
4165 unsigned long creation_time,
4166 SilcSocketConnection remote)
4168 SilcBuffer clients = NULL;
4169 SilcBuffer umodes = NULL;
4171 SILC_LOG_DEBUG(("Announcing clients"));
4173 /* Get clients in local list */
4174 silc_server_announce_get_clients(server, server->local_list,
4175 &clients, &umodes, creation_time);
4177 /* As router we announce our global list as well */
4178 if (server->server_type == SILC_ROUTER)
4179 silc_server_announce_get_clients(server, server->global_list,
4180 &clients, &umodes, creation_time);
4183 silc_buffer_push(clients, clients->data - clients->head);
4184 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4186 /* Send the packet */
4187 silc_server_packet_send(server, remote,
4188 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4189 clients->data, clients->len, TRUE);
4191 silc_buffer_free(clients);
4195 silc_buffer_push(umodes, umodes->data - umodes->head);
4196 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4198 /* Send the packet */
4199 silc_server_packet_send(server, remote,
4200 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4201 umodes->data, umodes->len, TRUE);
4203 silc_buffer_free(umodes);
4207 /* Returns channel's topic for announcing it */
4209 void silc_server_announce_get_channel_topic(SilcServer server,
4210 SilcChannelEntry channel,
4215 if (channel->topic) {
4216 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4217 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4218 chidp->data, chidp->len,
4220 strlen(channel->topic));
4221 silc_buffer_free(chidp);
4225 /* Returns assembled packets for channel users of the `channel'. */
4227 void silc_server_announce_get_channel_users(SilcServer server,
4228 SilcChannelEntry channel,
4229 SilcBuffer *channel_modes,
4230 SilcBuffer *channel_users,
4231 SilcBuffer *channel_users_modes)
4233 SilcChannelClientEntry chl;
4234 SilcHashTableList htl;
4235 SilcBuffer chidp, clidp, csidp;
4238 unsigned char mode[4], *fkey = NULL;
4239 SilcUInt32 fkey_len = 0;
4242 SILC_LOG_DEBUG(("Start"));
4244 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4245 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4248 SILC_PUT32_MSB(channel->mode, mode);
4249 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4250 if (channel->founder_key)
4251 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4253 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4254 6, csidp->data, csidp->len,
4257 hmac, hmac ? strlen(hmac) : 0,
4258 channel->passphrase,
4259 channel->passphrase ?
4260 strlen(channel->passphrase) : 0,
4264 silc_buffer_realloc(*channel_modes,
4266 (*channel_modes)->truelen + len : len));
4267 silc_buffer_pull_tail(*channel_modes,
4268 ((*channel_modes)->end -
4269 (*channel_modes)->data));
4270 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4271 silc_buffer_pull(*channel_modes, len);
4272 silc_buffer_free(tmp);
4277 /* Now find all users on the channel */
4278 silc_hash_table_list(channel->user_list, &htl);
4279 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4280 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4283 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4284 clidp->data, clidp->len,
4285 chidp->data, chidp->len);
4288 silc_buffer_realloc(*channel_users,
4290 (*channel_users)->truelen + len : len));
4291 silc_buffer_pull_tail(*channel_users,
4292 ((*channel_users)->end -
4293 (*channel_users)->data));
4295 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4296 silc_buffer_pull(*channel_users, len);
4297 silc_buffer_free(tmp);
4299 /* CUMODE notify for mode change on the channel */
4300 SILC_PUT32_MSB(chl->mode, mode);
4301 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4302 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4303 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4304 4, csidp->data, csidp->len,
4306 clidp->data, clidp->len,
4309 *channel_users_modes =
4310 silc_buffer_realloc(*channel_users_modes,
4311 (*channel_users_modes ?
4312 (*channel_users_modes)->truelen + len : len));
4313 silc_buffer_pull_tail(*channel_users_modes,
4314 ((*channel_users_modes)->end -
4315 (*channel_users_modes)->data));
4317 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4318 silc_buffer_pull(*channel_users_modes, len);
4319 silc_buffer_free(tmp);
4323 silc_buffer_free(clidp);
4325 silc_hash_table_list_reset(&htl);
4326 silc_buffer_free(chidp);
4327 silc_buffer_free(csidp);
4330 /* Returns assembled packets for all channels and users on those channels
4331 from the given ID List. The packets are in the form dictated by the
4332 New Channel and New Channel User payloads. */
4334 void silc_server_announce_get_channels(SilcServer server,
4336 SilcBuffer *channels,
4337 SilcBuffer **channel_modes,
4338 SilcBuffer *channel_users,
4339 SilcBuffer **channel_users_modes,
4340 SilcUInt32 *channel_users_modes_c,
4341 SilcBuffer **channel_topics,
4342 SilcChannelID ***channel_ids,
4343 unsigned long creation_time)
4345 SilcIDCacheList list;
4346 SilcIDCacheEntry id_cache;
4347 SilcChannelEntry channel;
4350 SilcUInt16 name_len;
4352 int i = *channel_users_modes_c;
4355 SILC_LOG_DEBUG(("Start"));
4357 /* Go through all channels in the list */
4358 if (silc_idcache_get_all(id_list->channels, &list)) {
4359 if (silc_idcache_list_first(list, &id_cache)) {
4361 channel = (SilcChannelEntry)id_cache->context;
4363 if (creation_time && channel->created < creation_time)
4368 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4369 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4370 name_len = strlen(channel->channel_name);
4373 len = 4 + name_len + id_len + 4;
4375 silc_buffer_realloc(*channels,
4376 (*channels ? (*channels)->truelen +
4378 silc_buffer_pull_tail(*channels,
4379 ((*channels)->end - (*channels)->data));
4380 silc_buffer_format(*channels,
4381 SILC_STR_UI_SHORT(name_len),
4382 SILC_STR_UI_XNSTRING(channel->channel_name,
4384 SILC_STR_UI_SHORT(id_len),
4385 SILC_STR_UI_XNSTRING(cid, id_len),
4386 SILC_STR_UI_INT(channel->mode),
4388 silc_buffer_pull(*channels, len);
4391 if (creation_time && channel->updated < creation_time)
4397 /* Channel user modes */
4398 *channel_users_modes = silc_realloc(*channel_users_modes,
4399 sizeof(**channel_users_modes) *
4401 (*channel_users_modes)[i] = NULL;
4402 *channel_modes = silc_realloc(*channel_modes,
4403 sizeof(**channel_modes) * (i + 1));
4404 (*channel_modes)[i] = NULL;
4405 *channel_ids = silc_realloc(*channel_ids,
4406 sizeof(**channel_ids) * (i + 1));
4407 (*channel_ids)[i] = NULL;
4408 silc_server_announce_get_channel_users(server, channel,
4409 &(*channel_modes)[i],
4411 &(*channel_users_modes)[i]);
4412 (*channel_ids)[i] = channel->id;
4414 /* Channel's topic */
4415 *channel_topics = silc_realloc(*channel_topics,
4416 sizeof(**channel_topics) * (i + 1));
4417 (*channel_topics)[i] = NULL;
4418 silc_server_announce_get_channel_topic(server, channel,
4419 &(*channel_topics)[i]);
4420 (*channel_users_modes_c)++;
4427 if (!silc_idcache_list_next(list, &id_cache))
4432 silc_idcache_list_free(list);
4436 /* This function is used to announce our existing channels to our router
4437 when we've connected to it. This also announces the users on the
4438 channels to the router. If the `creation_time' is non-zero only the
4439 channels that was created after the `creation_time' are announced.
4440 Note that the channel users are still announced even if the `creation_time'
4443 void silc_server_announce_channels(SilcServer server,
4444 unsigned long creation_time,
4445 SilcSocketConnection remote)
4447 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4448 SilcBuffer *channel_users_modes = NULL;
4449 SilcBuffer *channel_topics = NULL;
4450 SilcUInt32 channel_users_modes_c = 0;
4451 SilcChannelID **channel_ids = NULL;
4453 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4455 /* Get channels and channel users in local list */
4456 silc_server_announce_get_channels(server, server->local_list,
4457 &channels, &channel_modes,
4459 &channel_users_modes,
4460 &channel_users_modes_c,
4462 &channel_ids, creation_time);
4464 /* Get channels and channel users in global list */
4465 if (server->server_type != SILC_SERVER)
4466 silc_server_announce_get_channels(server, server->global_list,
4467 &channels, &channel_modes,
4469 &channel_users_modes,
4470 &channel_users_modes_c,
4472 &channel_ids, creation_time);
4475 silc_buffer_push(channels, channels->data - channels->head);
4476 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4478 /* Send the packet */
4479 silc_server_packet_send(server, remote,
4480 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4481 channels->data, channels->len,
4484 silc_buffer_free(channels);
4487 if (channel_users) {
4488 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4489 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4490 channel_users->len);
4492 /* Send the packet */
4493 silc_server_packet_send(server, remote,
4494 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4495 channel_users->data, channel_users->len,
4498 silc_buffer_free(channel_users);
4501 if (channel_modes) {
4504 for (i = 0; i < channel_users_modes_c; i++) {
4505 if (!channel_modes[i])
4507 silc_buffer_push(channel_modes[i],
4508 channel_modes[i]->data -
4509 channel_modes[i]->head);
4510 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4511 channel_modes[i]->len);
4512 silc_server_packet_send_dest(server, remote,
4513 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4514 channel_ids[i], SILC_ID_CHANNEL,
4515 channel_modes[i]->data,
4516 channel_modes[i]->len,
4518 silc_buffer_free(channel_modes[i]);
4520 silc_free(channel_modes);
4523 if (channel_users_modes) {
4526 for (i = 0; i < channel_users_modes_c; i++) {
4527 if (!channel_users_modes[i])
4529 silc_buffer_push(channel_users_modes[i],
4530 channel_users_modes[i]->data -
4531 channel_users_modes[i]->head);
4532 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4533 channel_users_modes[i]->len);
4534 silc_server_packet_send_dest(server, remote,
4535 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4536 channel_ids[i], SILC_ID_CHANNEL,
4537 channel_users_modes[i]->data,
4538 channel_users_modes[i]->len,
4540 silc_buffer_free(channel_users_modes[i]);
4542 silc_free(channel_users_modes);
4545 if (channel_topics) {
4548 for (i = 0; i < channel_users_modes_c; i++) {
4549 if (!channel_topics[i])
4552 silc_buffer_push(channel_topics[i],
4553 channel_topics[i]->data -
4554 channel_topics[i]->head);
4555 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4556 channel_topics[i]->len);
4557 silc_server_packet_send_dest(server, remote,
4558 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4559 channel_ids[i], SILC_ID_CHANNEL,
4560 channel_topics[i]->data,
4561 channel_topics[i]->len,
4563 silc_buffer_free(channel_topics[i]);
4565 silc_free(channel_topics);
4568 silc_free(channel_ids);
4571 /* Failure timeout callback. If this is called then we will immediately
4572 process the received failure. We always process the failure with timeout
4573 since we do not want to blindly trust to received failure packets.
4574 This won't be called (the timeout is cancelled) if the failure was
4575 bogus (it is bogus if remote does not close the connection after sending
4578 SILC_TASK_CALLBACK(silc_server_failure_callback)
4580 SilcServer server = app_context;
4581 SilcServerFailureContext f = (SilcServerFailureContext)context;
4583 if (f->sock->protocol) {
4584 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4585 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4588 silc_socket_free(f->sock);
4592 /* Assembles user list and users mode list from the `channel'. */
4594 bool silc_server_get_users_on_channel(SilcServer server,
4595 SilcChannelEntry channel,
4596 SilcBuffer *user_list,
4597 SilcBuffer *mode_list,
4598 SilcUInt32 *user_count)
4600 SilcChannelClientEntry chl;
4601 SilcHashTableList htl;
4602 SilcBuffer client_id_list;
4603 SilcBuffer client_mode_list;
4605 SilcUInt32 list_count = 0, len = 0;
4607 if (!silc_hash_table_count(channel->user_list))
4610 silc_hash_table_list(channel->user_list, &htl);
4611 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4612 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4613 silc_hash_table_list_reset(&htl);
4615 client_id_list = silc_buffer_alloc(len);
4617 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4618 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4619 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4621 silc_hash_table_list(channel->user_list, &htl);
4622 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4624 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4625 silc_buffer_put(client_id_list, idp->data, idp->len);
4626 silc_buffer_pull(client_id_list, idp->len);
4627 silc_buffer_free(idp);
4629 /* Client's mode on channel */
4630 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4631 silc_buffer_pull(client_mode_list, 4);
4635 silc_hash_table_list_reset(&htl);
4636 silc_buffer_push(client_id_list,
4637 client_id_list->data - client_id_list->head);
4638 silc_buffer_push(client_mode_list,
4639 client_mode_list->data - client_mode_list->head);
4641 *user_list = client_id_list;
4642 *mode_list = client_mode_list;
4643 *user_count = list_count;
4647 /* Saves users and their modes to the `channel'. */
4649 void silc_server_save_users_on_channel(SilcServer server,
4650 SilcSocketConnection sock,
4651 SilcChannelEntry channel,
4652 SilcClientID *noadd,
4653 SilcBuffer user_list,
4654 SilcBuffer mode_list,
4655 SilcUInt32 user_count)
4660 SilcClientID *client_id;
4661 SilcClientEntry client;
4662 SilcIDCacheEntry cache;
4663 SilcChannelClientEntry chl;
4665 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4666 channel->channel_name));
4668 for (i = 0; i < user_count; i++) {
4670 SILC_GET16_MSB(idp_len, user_list->data + 2);
4672 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4673 silc_buffer_pull(user_list, idp_len);
4678 SILC_GET32_MSB(mode, mode_list->data);
4679 silc_buffer_pull(mode_list, 4);
4681 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4682 silc_free(client_id);
4688 /* Check if we have this client cached already. */
4689 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4690 server->server_type, &cache);
4692 client = silc_idlist_find_client_by_id(server->global_list,
4693 client_id, server->server_type,
4696 /* If router did not find such Client ID in its lists then this must
4697 be bogus client or some router in the net is buggy. */
4698 if (server->server_type != SILC_SERVER) {
4699 silc_free(client_id);
4703 /* We don't have that client anywhere, add it. The client is added
4704 to global list since server didn't have it in the lists so it must be
4706 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4707 silc_id_dup(client_id, SILC_ID_CLIENT),
4708 sock->user_data, NULL, 0);
4710 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4711 silc_free(client_id);
4715 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4720 silc_free(client_id);
4722 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4723 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4724 "%s", channel->channel_name));
4728 if (!silc_server_client_on_channel(client, channel, &chl)) {
4729 /* Client was not on the channel, add it. */
4730 chl = silc_calloc(1, sizeof(*chl));
4731 chl->client = client;
4733 chl->channel = channel;
4734 silc_hash_table_add(channel->user_list, chl->client, chl);
4735 silc_hash_table_add(client->channels, chl->channel, chl);
4736 channel->user_count++;
4744 /* Saves channels and channels user modes to the `client'. Removes
4745 the client from those channels that are not sent in the list but
4748 void silc_server_save_user_channels(SilcServer server,
4749 SilcSocketConnection sock,
4750 SilcClientEntry client,
4751 SilcBuffer channels,
4752 SilcBuffer channels_user_modes)
4755 SilcUInt32 *chumodes;
4756 SilcChannelPayload entry;
4757 SilcChannelEntry channel;
4758 SilcChannelID *channel_id;
4759 SilcChannelClientEntry chl;
4760 SilcHashTable ht = NULL;
4761 SilcHashTableList htl;
4765 if (!channels || !channels_user_modes ||
4766 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4769 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4770 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4772 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4773 NULL, NULL, NULL, TRUE);
4774 silc_dlist_start(ch);
4775 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4776 /* Check if we have this channel, and add it if we don't have it.
4777 Also add the client on the channel unless it is there already. */
4778 channel_id = silc_channel_get_id_parse(entry);
4779 channel = silc_idlist_find_channel_by_id(server->local_list,
4782 channel = silc_idlist_find_channel_by_id(server->global_list,
4785 if (server->server_type != SILC_SERVER) {
4786 silc_free(channel_id);
4791 /* We don't have that channel anywhere, add it. */
4792 name = silc_channel_get_name(entry, NULL);
4793 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4794 channel_id, server->router,
4797 silc_free(channel_id);
4804 channel->mode = silc_channel_get_mode(entry);
4806 /* Add the client on the channel */
4807 if (!silc_server_client_on_channel(client, channel, &chl)) {
4808 chl = silc_calloc(1, sizeof(*chl));
4809 chl->client = client;
4810 chl->mode = chumodes[i++];
4811 chl->channel = channel;
4812 silc_hash_table_add(channel->user_list, chl->client, chl);
4813 silc_hash_table_add(client->channels, chl->channel, chl);
4814 channel->user_count++;
4817 chl->mode = chumodes[i++];
4820 silc_hash_table_add(ht, channel, channel);
4821 silc_free(channel_id);
4823 silc_channel_payload_list_free(ch);
4824 silc_free(chumodes);
4828 /* Go through the list again and remove client from channels that
4829 are no part of the list. */
4831 silc_hash_table_list(client->channels, &htl);
4832 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4833 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4834 silc_hash_table_del(chl->channel->user_list, chl->client);
4835 silc_hash_table_del(chl->client->channels, chl->channel);
4839 silc_hash_table_list_reset(&htl);
4840 silc_hash_table_free(ht);
4842 silc_hash_table_list(client->channels, &htl);
4843 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4844 silc_hash_table_del(chl->channel->user_list, chl->client);
4845 silc_hash_table_del(chl->client->channels, chl->channel);
4848 silc_hash_table_list_reset(&htl);
4852 /* Lookups route to the client indicated by the `id_data'. The connection
4853 object and internal data object is returned. Returns NULL if route
4854 could not be found to the client. If the `client_id' is specified then
4855 it is used and the `id_data' is ignored. */
4857 SilcSocketConnection
4858 silc_server_get_client_route(SilcServer server,
4859 unsigned char *id_data,
4861 SilcClientID *client_id,
4862 SilcIDListData *idata,
4863 SilcClientEntry *client_entry)
4866 SilcClientEntry client;
4868 SILC_LOG_DEBUG(("Start"));
4871 *client_entry = NULL;
4873 /* Decode destination Client ID */
4875 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4877 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4881 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4884 /* If the destination belongs to our server we don't have to route
4885 the packet anywhere but to send it to the local destination. */
4886 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4890 /* If we are router and the client has router then the client is in
4891 our cell but not directly connected to us. */
4892 if (server->server_type == SILC_ROUTER && client->router) {
4893 /* We are of course in this case the client's router thus the route
4894 to the client is the server who owns the client. So, we will send
4895 the packet to that server. */
4897 *idata = (SilcIDListData)client->router;
4898 return client->router->connection;
4901 /* Seems that client really is directly connected to us */
4903 *idata = (SilcIDListData)client;
4905 *client_entry = client;
4906 return client->connection;
4909 /* Destination belongs to someone not in this server. If we are normal
4910 server our action is to send the packet to our router. */
4911 if (server->server_type != SILC_ROUTER && !server->standalone) {
4914 *idata = (SilcIDListData)server->router;
4915 return SILC_PRIMARY_ROUTE(server);
4918 /* We are router and we will perform route lookup for the destination
4919 and send the packet to fastest route. */
4920 if (server->server_type == SILC_ROUTER && !server->standalone) {
4921 /* Check first that the ID is valid */
4922 client = silc_idlist_find_client_by_id(server->global_list, id,
4925 SilcSocketConnection dst_sock;
4927 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4931 *idata = (SilcIDListData)dst_sock->user_data;
4940 /* Encodes and returns channel list of channels the `client' has joined.
4941 Secret channels are not put to the list. */
4943 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4944 SilcClientEntry client,
4947 SilcBuffer *user_mode_list)
4949 SilcBuffer buffer = NULL;
4950 SilcChannelEntry channel;
4951 SilcChannelClientEntry chl;
4952 SilcHashTableList htl;
4955 SilcUInt16 name_len;
4959 *user_mode_list = NULL;
4961 silc_hash_table_list(client->channels, &htl);
4962 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4963 channel = chl->channel;
4965 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4967 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4970 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4971 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4972 name_len = strlen(channel->channel_name);
4974 len = 4 + name_len + id_len + 4;
4975 buffer = silc_buffer_realloc(buffer,
4976 (buffer ? buffer->truelen + len : len));
4977 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4978 silc_buffer_format(buffer,
4979 SILC_STR_UI_SHORT(name_len),
4980 SILC_STR_UI_XNSTRING(channel->channel_name,
4982 SILC_STR_UI_SHORT(id_len),
4983 SILC_STR_UI_XNSTRING(cid, id_len),
4984 SILC_STR_UI_INT(chl->channel->mode),
4986 silc_buffer_pull(buffer, len);
4989 if (user_mode_list) {
4990 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4992 (*user_mode_list)->truelen + 4 :
4994 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4995 (*user_mode_list)->data));
4996 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4997 silc_buffer_pull(*user_mode_list, 4);
5000 silc_hash_table_list_reset(&htl);
5003 silc_buffer_push(buffer, buffer->data - buffer->head);
5004 if (user_mode_list && *user_mode_list)
5005 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5006 (*user_mode_list)->head));
5011 /* A timeout callback for the re-key. We will be the initiator of the
5014 SILC_TASK_CALLBACK(silc_server_rekey_callback)
5016 SilcServer server = app_context;
5017 SilcSocketConnection sock = (SilcSocketConnection)context;
5018 SilcIDListData idata = (SilcIDListData)sock->user_data;
5019 SilcProtocol protocol;
5020 SilcServerRekeyInternalContext *proto_ctx;
5022 /* Allocate internal protocol context. This is sent as context
5024 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5025 proto_ctx->server = (void *)server;
5026 proto_ctx->sock = sock;
5027 proto_ctx->responder = FALSE;
5028 proto_ctx->pfs = idata->rekey->pfs;
5030 /* Perform rekey protocol. Will call the final callback after the
5031 protocol is over. */
5032 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5033 &protocol, proto_ctx, silc_server_rekey_final);
5034 sock->protocol = protocol;
5036 /* Run the protocol */
5037 silc_protocol_execute(protocol, server->schedule, 0, 0);
5039 SILC_LOG_DEBUG(("Rekey protocol completed"));
5041 /* Re-register re-key timeout */
5042 silc_schedule_task_add(server->schedule, sock->sock,
5043 silc_server_rekey_callback,
5044 context, idata->rekey->timeout, 0,
5045 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5048 /* The final callback for the REKEY protocol. This will actually take the
5049 new key material into use. */
5051 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5053 SilcProtocol protocol = (SilcProtocol)context;
5054 SilcServerRekeyInternalContext *ctx =
5055 (SilcServerRekeyInternalContext *)protocol->context;
5056 SilcServer server = (SilcServer)ctx->server;
5057 SilcSocketConnection sock = ctx->sock;
5059 SILC_LOG_DEBUG(("Start"));
5061 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5062 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5063 /* Error occured during protocol */
5064 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5065 silc_protocol_cancel(protocol, server->schedule);
5066 silc_protocol_free(protocol);
5067 sock->protocol = NULL;
5069 silc_packet_context_free(ctx->packet);
5071 silc_ske_free(ctx->ske);
5076 /* Purge the outgoing data queue to assure that all rekey packets really
5077 go to the network before we quit the protocol. */
5078 silc_server_packet_queue_purge(server, sock);
5081 silc_protocol_free(protocol);
5082 sock->protocol = NULL;
5084 silc_packet_context_free(ctx->packet);
5086 silc_ske_free(ctx->ske);
5090 /* Task callback used to retrieve network statistical information from
5091 router server once in a while. */
5093 SILC_TASK_CALLBACK(silc_server_get_stats)
5095 SilcServer server = (SilcServer)context;
5096 SilcBuffer idp, packet;
5098 SILC_LOG_DEBUG(("Retrieving stats from router"));
5100 if (!server->standalone) {
5101 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5102 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5103 ++server->cmd_ident, 1,
5104 1, idp->data, idp->len);
5105 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5106 SILC_PACKET_COMMAND, 0, packet->data,
5107 packet->len, FALSE);
5108 silc_buffer_free(packet);
5109 silc_buffer_free(idp);
5112 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5113 server, 120, 0, SILC_TASK_TIMEOUT,