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_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);
324 if (!server->schedule)
327 /* First, register log files configuration for error output */
328 silc_server_config_setlogfiles(server);
330 /* Initialize ID caches */
331 server->local_list->clients =
332 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
333 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
334 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
336 /* These are allocated for normal server as well as these hold some
337 global information that the server has fetched from its router. For
338 router these are used as they are supposed to be used on router. */
339 server->global_list->clients =
340 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
341 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
342 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
344 /* Init watcher list */
345 server->watcher_list =
346 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
347 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
349 if (!server->watcher_list)
352 /* Create a listening server */
353 if (!silc_server_listen(server,
354 server->config->server_info->primary == NULL ? NULL :
355 server->config->server_info->primary->server_ip,
356 server->config->server_info->primary == NULL ? 0 :
357 server->config->server_info->primary->port,
361 /* Set socket to non-blocking mode */
362 silc_net_set_socket_nonblock(sock);
365 /* Allocate the entire socket list that is used in server. Eventually
366 all connections will have entry in this table (it is a table of
367 pointers to the actual object that is allocated individually
369 server->sockets = silc_calloc(server->config->param.connections_max,
370 sizeof(*server->sockets));
371 if (!server->sockets)
374 /* Add ourselves also to the socket table. The entry allocated above
375 is sent as argument for fast referencing in the future. */
376 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
377 server->sockets[sock] = newsocket;
378 SILC_SET_LISTENER(newsocket);
380 /* Perform name and address lookups to resolve the listenning address
382 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
384 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
386 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
387 newsocket->hostname ? newsocket->hostname :
388 newsocket->ip ? newsocket->ip : ""));
389 server->stat.conn_failures++;
392 if (!newsocket->hostname)
393 newsocket->hostname = strdup(newsocket->ip);
395 newsocket->port = silc_net_get_local_port(sock);
397 /* Create a Server ID for the server. */
398 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
403 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
404 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
405 server->server_name = server->config->server_info->server_name;
406 server->config->server_info->server_name = NULL;
408 /* Add ourselves to the server list. We don't have a router yet
409 beacuse we haven't established a route yet. It will be done later.
410 For now, NULL is sent as router. This allocates new entry to
413 silc_idlist_add_server(server->local_list, strdup(server->server_name),
414 server->server_type, server->id, NULL, NULL);
416 SILC_LOG_ERROR(("Could not add ourselves to cache"));
419 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
421 /* Put the allocated socket pointer also to the entry allocated above
422 for fast back-referencing to the socket list. */
423 newsocket->user_data = (void *)id_entry;
424 id_entry->connection = (void *)newsocket;
425 server->id_entry = id_entry;
427 /* Register protocols */
428 silc_server_protocols_register();
430 /* Add the first task to the scheduler. This is task that is executed by
431 timeout. It expires as soon as the caller calls silc_server_run. This
432 task performs authentication protocol and key exchange with our
434 silc_schedule_task_add(server->schedule, 0,
435 silc_server_connect_to_router,
436 (void *)server, 0, 1,
438 SILC_TASK_PRI_NORMAL);
440 /* Add listener task to the scheduler. This task receives new connections
441 to the server. This task remains on the queue until the end of the
443 silc_schedule_task_add(server->schedule, sock,
444 silc_server_accept_new_connection,
445 (void *)server, 0, 0,
447 SILC_TASK_PRI_NORMAL);
449 if (silc_server_init_secondary(server) == FALSE)
452 server->listenning = TRUE;
454 /* If server connections has been configured then we must be router as
455 normal server cannot have server connections, only router connections. */
456 if (server->config->servers) {
457 SilcServerConfigServer *ptr = server->config->servers;
459 server->server_type = SILC_ROUTER;
461 if (ptr->backup_router) {
462 server->server_type = SILC_BACKUP_ROUTER;
463 server->backup_router = TRUE;
464 server->id_entry->server_type = SILC_BACKUP_ROUTER;
471 /* Register the ID Cache purge task. This periodically purges the ID cache
472 and removes the expired cache entries. */
474 /* Clients local list */
475 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
476 purge->cache = server->local_list->clients;
477 purge->schedule = server->schedule;
478 purge->timeout = 600;
479 silc_schedule_task_add(purge->schedule, 0,
481 (void *)purge, purge->timeout, 0,
482 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
484 /* Clients global list */
485 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
486 purge->cache = server->global_list->clients;
487 purge->schedule = server->schedule;
488 purge->timeout = 300;
489 silc_schedule_task_add(purge->schedule, 0,
491 (void *)purge, purge->timeout, 0,
492 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
494 /* If we are normal server we'll retrieve network statisticial information
495 once in a while from the router. */
496 if (server->server_type == SILC_SERVER)
497 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
498 server, 10, 0, SILC_TASK_TIMEOUT,
501 if (server->server_type == SILC_ROUTER)
502 server->stat.routers++;
504 SILC_LOG_DEBUG(("Server initialized"));
506 /* We are done here, return succesfully */
510 silc_server_config_unref(&server->config_ref);
511 silc_net_close_server(sock);
515 /* Task callback to close a socket connection after rehash */
517 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
519 SilcServer server = context;
520 SilcSocketConnection sock = server->sockets[fd];
525 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
526 sock->hostname, sock->port,
527 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
528 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
529 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
531 silc_schedule_task_del_by_context(server->schedule, sock);
532 silc_server_disconnect_remote(server, sock,
533 SILC_STATUS_ERR_BANNED_FROM_SERVER,
534 "This connection is removed from "
537 silc_server_free_sock_user_data(server, sock, NULL);
540 /* This function basically reads the config file again and switches the config
541 object pointed by the server object. After that, we have to fix various
542 things such as the server_name and the listening ports.
543 Keep in mind that we no longer have the root privileges at this point. */
545 bool silc_server_rehash(SilcServer server)
547 SilcServerConfig newconfig;
549 SILC_LOG_INFO(("Rehashing server"));
551 /* Reset the logging system */
552 silc_log_quick = TRUE;
553 silc_log_flush_all();
555 /* Start the main rehash phase (read again the config file) */
556 newconfig = silc_server_config_alloc(server->config_file);
558 SILC_LOG_ERROR(("Rehash FAILED."));
562 /* Reinit scheduler if necessary */
563 if (newconfig->param.connections_max > server->config->param.connections_max)
564 if (!silc_schedule_reinit(server->schedule,
565 newconfig->param.connections_max))
568 /* Fix the server_name field */
569 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
570 silc_free(server->server_name);
571 server->server_name = newconfig->server_info->server_name;
572 newconfig->server_info->server_name = NULL;
574 /* Update the idcache list with a fresh pointer */
575 silc_free(server->id_entry->server_name);
576 server->id_entry->server_name = strdup(server->server_name);
577 if (!silc_idcache_del_by_context(server->local_list->servers,
580 if (!silc_idcache_add(server->local_list->servers,
581 server->id_entry->server_name,
582 server->id_entry->id, server->id_entry, 0, NULL))
587 silc_server_config_setlogfiles(server);
589 /* Change new key pair if necessary */
590 if (newconfig->server_info->public_key &&
591 !silc_pkcs_public_key_compare(server->public_key,
592 newconfig->server_info->public_key)) {
593 silc_pkcs_public_key_free(server->public_key);
594 silc_pkcs_private_key_free(server->private_key);
595 server->public_key = newconfig->server_info->public_key;
596 server->private_key = newconfig->server_info->private_key;
597 newconfig->server_info->public_key = NULL;
598 newconfig->server_info->private_key = NULL;
600 /* Allocate PKCS context for local public and private keys */
601 silc_pkcs_free(server->pkcs);
602 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
604 silc_pkcs_public_key_set(server->pkcs, server->public_key);
605 silc_pkcs_private_key_set(server->pkcs, server->private_key);
608 /* Check for unconfigured server and router connections and close
609 connections that were unconfigured. */
611 if (server->config->routers) {
612 SilcServerConfigRouter *ptr;
613 SilcServerConfigRouter *newptr;
616 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
619 /* Check whether new config has this one too */
620 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
621 if (!strcmp(newptr->host, ptr->host) && newptr->port == ptr->port &&
622 newptr->initiator == ptr->initiator) {
629 /* Remove this connection */
630 SilcSocketConnection sock;
631 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
632 ptr->host, ptr->port);
633 if (sock && !SILC_IS_LISTENER(sock))
634 silc_schedule_task_add(server->schedule, sock->sock,
635 silc_server_rehash_close_connection,
636 server, 0, 1, SILC_TASK_TIMEOUT,
637 SILC_TASK_PRI_NORMAL);
642 if (server->config->servers) {
643 SilcServerConfigServer *ptr;
644 SilcServerConfigServer *newptr;
647 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
650 /* Check whether new config has this one too */
651 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
652 if (!strcmp(newptr->host, ptr->host)) {
659 /* Remove this connection */
660 SilcSocketConnection sock;
661 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
663 if (sock && !SILC_IS_LISTENER(sock))
664 silc_schedule_task_add(server->schedule, sock->sock,
665 silc_server_rehash_close_connection,
666 server, 0, 1, SILC_TASK_TIMEOUT,
667 SILC_TASK_PRI_NORMAL);
672 /* Go through all configured routers after rehash */
673 silc_schedule_task_add(server->schedule, 0,
674 silc_server_connect_to_router,
675 (void *)server, 0, 1,
677 SILC_TASK_PRI_NORMAL);
679 /* Check whether our router status has changed */
680 if (newconfig->servers) {
681 SilcServerConfigServer *ptr = newconfig->servers;
683 server->server_type = SILC_ROUTER;
685 if (ptr->backup_router) {
686 server->server_type = SILC_BACKUP_ROUTER;
687 server->backup_router = TRUE;
688 server->id_entry->server_type = SILC_BACKUP_ROUTER;
695 /* Our old config is gone now. We'll unreference our reference made in
696 silc_server_init and then destroy it since we are destroying it
697 underneath the application (layer which called silc_server_init). */
698 silc_server_config_unref(&server->config_ref);
699 silc_server_config_destroy(server->config);
701 /* Take new config context */
702 server->config = newconfig;
703 silc_server_config_ref(&server->config_ref, server->config, server->config);
705 SILC_LOG_DEBUG(("Server rehashed"));
710 /* The heart of the server. This runs the scheduler thus runs the server.
711 When this returns the server has been stopped and the program will
714 void silc_server_run(SilcServer server)
716 SILC_LOG_INFO(("SILC Server started"));
718 /* Start the scheduler, the heart of the SILC server. When this returns
719 the program will be terminated. */
720 silc_schedule(server->schedule);
723 /* Stops the SILC server. This function is used to shutdown the server.
724 This is usually called after the scheduler has returned. After stopping
725 the server one should call silc_server_free. */
727 void silc_server_stop(SilcServer server)
729 SILC_LOG_DEBUG(("Stopping server"));
731 if (server->schedule) {
734 server->server_shutdown = TRUE;
736 /* Close all connections */
737 for (i = 0; i < server->config->param.connections_max; i++) {
738 if (!server->sockets[i])
740 if (!SILC_IS_LISTENER(server->sockets[i])) {
741 SilcSocketConnection sock = server->sockets[i];
742 SilcIDListData idata = sock->user_data;
745 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
747 silc_schedule_task_del_by_context(server->schedule,
749 silc_server_disconnect_remote(server, server->sockets[i],
751 "Server is shutting down");
753 silc_server_free_sock_user_data(server, sock,
754 "Server is shutting down");
755 silc_socket_free(sock);
757 silc_socket_free(server->sockets[i]);
758 server->sockets[i] = NULL;
762 /* We are not connected to network anymore */
763 server->standalone = TRUE;
765 silc_schedule_stop(server->schedule);
766 silc_schedule_uninit(server->schedule);
767 server->schedule = NULL;
769 silc_free(server->sockets);
770 server->sockets = NULL;
773 silc_server_protocols_unregister();
775 SILC_LOG_DEBUG(("Server stopped"));
778 /* Function that is called when the network connection to a router has
779 been established. This will continue with the key exchange protocol
780 with the remote router. */
782 void silc_server_start_key_exchange(SilcServer server,
783 SilcServerConnection sconn,
786 SilcSocketConnection newsocket;
787 SilcProtocol protocol;
788 SilcServerKEInternalContext *proto_ctx;
789 SilcServerConfigRouter *conn =
790 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
793 /* Cancel any possible retry timeouts */
794 silc_schedule_task_del_by_callback(server->schedule,
795 silc_server_connect_to_router_retry);
797 /* Set socket options */
798 silc_net_set_socket_nonblock(sock);
799 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
801 /* Create socket connection for the connection. Even though we
802 know that we are connecting to a router we will mark the socket
803 to be unknown connection until we have executed authentication
805 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
806 server->sockets[sock] = newsocket;
807 newsocket->hostname = strdup(sconn->remote_host);
808 newsocket->ip = strdup(sconn->remote_host);
809 newsocket->port = sconn->remote_port;
810 sconn->sock = newsocket;
812 /* Allocate internal protocol context. This is sent as context
814 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
815 proto_ctx->server = (void *)server;
816 proto_ctx->context = (void *)sconn;
817 proto_ctx->sock = newsocket;
818 proto_ctx->rng = server->rng;
819 proto_ctx->responder = FALSE;
821 /* Set Key Exchange flags from configuration, but fall back to global
823 SILC_GET_SKE_FLAGS(conn, proto_ctx);
824 if (server->config->param.key_exchange_pfs)
825 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
827 /* Perform key exchange protocol. silc_server_connect_to_router_second
828 will be called after the protocol is finished. */
829 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
830 &protocol, proto_ctx,
831 silc_server_connect_to_router_second);
832 newsocket->protocol = protocol;
834 /* Register a timeout task that will be executed if the protocol
835 is not executed within set limit. */
836 proto_ctx->timeout_task =
837 silc_schedule_task_add(server->schedule, sock,
838 silc_server_timeout_remote,
839 server, server->config->key_exchange_timeout, 0,
843 /* Register the connection for network input and output. This sets
844 that scheduler will listen for incoming packets for this connection
845 and sets that outgoing packets may be sent to this connection as
846 well. However, this doesn't set the scheduler for outgoing traffic,
847 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
848 later when outgoing data is available. */
849 context = (void *)server;
850 SILC_REGISTER_CONNECTION_FOR_IO(sock);
852 /* Run the protocol */
853 silc_protocol_execute(protocol, server->schedule, 0, 0);
856 /* Timeout callback that will be called to retry connecting to remote
857 router. This is used by both normal and router server. This will wait
858 before retrying the connecting. The timeout is generated by exponential
859 backoff algorithm. */
861 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
863 SilcServerConnection sconn = (SilcServerConnection)context;
864 SilcServer server = sconn->server;
865 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
866 SilcServerConfigConnParams *param =
867 (conn->param ? conn->param : &server->config->param);
869 /* Don't retry if we are shutting down. */
870 if (server->server_shutdown) {
871 silc_server_config_unref(&sconn->conn);
872 silc_free(sconn->remote_host);
873 silc_free(sconn->backup_replace_ip);
878 SILC_LOG_INFO(("Retrying connecting to a router"));
880 /* Calculate next timeout */
881 if (sconn->retry_count >= 1) {
882 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
883 if (sconn->retry_timeout > param->reconnect_interval_max)
884 sconn->retry_timeout = param->reconnect_interval_max;
886 sconn->retry_timeout = param->reconnect_interval;
888 sconn->retry_count++;
889 sconn->retry_timeout = sconn->retry_timeout +
890 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
892 /* If we've reached max retry count, give up. */
893 if ((sconn->retry_count > param->reconnect_count) &&
894 !param->reconnect_keep_trying) {
895 SILC_LOG_ERROR(("Could not connect to router, giving up"));
896 silc_server_config_unref(&sconn->conn);
897 silc_free(sconn->remote_host);
898 silc_free(sconn->backup_replace_ip);
903 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
904 sconn->retry_timeout));
906 /* We will lookup a fresh pointer later */
907 silc_server_config_unref(&sconn->conn);
909 /* Wait one before retrying */
910 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
911 context, sconn->retry_timeout, 0,
912 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
915 /* Generic routine to use connect to a router. */
917 SILC_TASK_CALLBACK(silc_server_connect_router)
919 SilcServerConnection sconn = (SilcServerConnection)context;
920 SilcServer server = sconn->server;
921 SilcServerConfigRouter *rconn;
924 /* Don't connect if we are shutting down. */
925 if (server->server_shutdown) {
926 silc_free(sconn->remote_host);
927 silc_free(sconn->backup_replace_ip);
932 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
933 (sconn->backup ? "backup router" : "router"),
934 sconn->remote_host, sconn->remote_port));
936 server->router_connect = time(NULL);
937 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
940 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
941 (sconn->backup ? "backup router" : "router"),
942 sconn->remote_host, sconn->remote_port));
943 silc_free(sconn->remote_host);
944 silc_free(sconn->backup_replace_ip);
948 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
950 /* Connect to remote host */
951 sock = silc_net_create_connection(
952 (!server->config->server_info->primary ? NULL :
953 server->config->server_info->primary->server_ip),
954 sconn->remote_port, sconn->remote_host);
956 SILC_LOG_ERROR(("Could not connect to router %s:%d",
957 sconn->remote_host, sconn->remote_port));
958 if (!sconn->no_reconnect)
959 silc_schedule_task_add(server->schedule, 0,
960 silc_server_connect_to_router_retry,
961 context, 0, 1, SILC_TASK_TIMEOUT,
962 SILC_TASK_PRI_NORMAL);
964 silc_server_config_unref(&sconn->conn);
968 /* Continue with key exchange protocol */
969 silc_server_start_key_exchange(server, sconn, sock);
972 /* This function connects to our primary router or if we are a router this
973 establishes all our primary routes. This is called at the start of the
974 server to do authentication and key exchange with our router - called
977 SILC_TASK_CALLBACK(silc_server_connect_to_router)
979 SilcServer server = (SilcServer)context;
980 SilcServerConnection sconn;
981 SilcServerConfigRouter *ptr;
983 /* Don't connect if we are shutting down. */
984 if (server->server_shutdown)
987 SILC_LOG_DEBUG(("We are %s",
988 (server->server_type == SILC_SERVER ?
989 "normal server" : server->server_type == SILC_ROUTER ?
990 "router" : "backup router/normal server")));
992 if (!server->config->routers) {
993 /* There wasn't a configured router, we will continue but we don't
994 have a connection to outside world. We will be standalone server. */
995 SILC_LOG_DEBUG(("No router(s), we are standalone"));
996 server->standalone = TRUE;
1000 /* Cancel any possible retry timeouts */
1001 silc_schedule_task_del_by_callback(server->schedule,
1002 silc_server_connect_router);
1003 silc_schedule_task_del_by_callback(server->schedule,
1004 silc_server_connect_to_router_retry);
1006 /* Create the connections to all our routes */
1007 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1009 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1010 ptr->backup_router ? "Backup router" : "Router",
1011 ptr->initiator ? "Initiator" : "Responder",
1012 ptr->host, ptr->port));
1014 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1015 ptr->initiator == FALSE && !server->backup_router &&
1016 !silc_server_config_get_backup_router(server))
1017 server->wait_backup = TRUE;
1019 if (ptr->initiator) {
1020 /* Check whether we are connected to this host already */
1021 if (silc_server_num_sockets_by_remote(server,
1022 silc_net_is_ip(ptr->host) ?
1024 silc_net_is_ip(ptr->host) ?
1025 NULL : ptr->host, ptr->port,
1026 SILC_SOCKET_TYPE_ROUTER)) {
1027 SILC_LOG_DEBUG(("We are already connected to this router"));
1031 /* Allocate connection object for hold connection specific stuff. */
1032 sconn = silc_calloc(1, sizeof(*sconn));
1033 sconn->server = server;
1034 sconn->remote_host = strdup(ptr->host);
1035 sconn->remote_port = ptr->port;
1036 sconn->backup = ptr->backup_router;
1037 if (sconn->backup) {
1038 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1039 sconn->backup_replace_port = ptr->backup_replace_port;
1042 if (!server->router_conn && !sconn->backup)
1043 server->router_conn = sconn;
1045 silc_schedule_task_add(server->schedule, 0,
1046 silc_server_connect_router,
1047 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1048 SILC_TASK_PRI_NORMAL);
1053 /* Second part of connecting to router(s). Key exchange protocol has been
1054 executed and now we will execute authentication protocol. */
1056 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1058 SilcProtocol protocol = (SilcProtocol)context;
1059 SilcServerKEInternalContext *ctx =
1060 (SilcServerKEInternalContext *)protocol->context;
1061 SilcServer server = (SilcServer)ctx->server;
1062 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1063 SilcSocketConnection sock = ctx->sock;
1064 SilcServerConnAuthInternalContext *proto_ctx;
1065 SilcServerConfigRouter *conn = NULL;
1067 SILC_LOG_DEBUG(("Start"));
1069 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1070 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1071 /* Error occured during protocol */
1072 silc_protocol_free(protocol);
1073 sock->protocol = NULL;
1074 silc_ske_free_key_material(ctx->keymat);
1076 silc_packet_context_free(ctx->packet);
1078 silc_ske_free(ctx->ske);
1079 silc_free(ctx->dest_id);
1081 silc_schedule_task_del_by_callback(server->schedule,
1082 silc_server_failure_callback);
1083 silc_server_disconnect_remote(server, sock,
1084 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1086 /* Try reconnecting if configuration wants it */
1087 if (!sconn->no_reconnect) {
1088 silc_schedule_task_add(server->schedule, 0,
1089 silc_server_connect_to_router_retry,
1090 sconn, 0, 1, SILC_TASK_TIMEOUT,
1091 SILC_TASK_PRI_NORMAL);
1095 /* Call completion to indicate error */
1096 if (sconn->callback)
1097 (*sconn->callback)(server, NULL, sconn->callback_context);
1099 silc_server_config_unref(&sconn->conn);
1100 silc_free(sconn->remote_host);
1101 silc_free(sconn->backup_replace_ip);
1106 /* We now have the key material as the result of the key exchange
1107 protocol. Take the key material into use. Free the raw key material
1108 as soon as we've set them into use. */
1109 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1110 ctx->sock, ctx->keymat,
1111 ctx->ske->prop->cipher,
1112 ctx->ske->prop->pkcs,
1113 ctx->ske->prop->hash,
1114 ctx->ske->prop->hmac,
1115 ctx->ske->prop->group,
1117 silc_protocol_free(protocol);
1118 sock->protocol = NULL;
1119 silc_ske_free_key_material(ctx->keymat);
1121 silc_packet_context_free(ctx->packet);
1123 silc_ske_free(ctx->ske);
1124 silc_free(ctx->dest_id);
1126 silc_schedule_task_del_by_callback(server->schedule,
1127 silc_server_failure_callback);
1128 silc_server_disconnect_remote(server, sock,
1129 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1131 /* Try reconnecting if configuration wants it */
1132 if (!sconn->no_reconnect) {
1133 silc_schedule_task_add(server->schedule, 0,
1134 silc_server_connect_to_router_retry,
1135 sconn, 0, 1, SILC_TASK_TIMEOUT,
1136 SILC_TASK_PRI_NORMAL);
1140 /* Call completion to indicate error */
1141 if (sconn->callback)
1142 (*sconn->callback)(server, NULL, sconn->callback_context);
1144 silc_server_config_unref(&sconn->conn);
1145 silc_free(sconn->remote_host);
1146 silc_free(sconn->backup_replace_ip);
1150 silc_ske_free_key_material(ctx->keymat);
1152 /* Allocate internal context for the authentication protocol. This
1153 is sent as context for the protocol. */
1154 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1155 proto_ctx->server = (void *)server;
1156 proto_ctx->context = (void *)sconn;
1157 proto_ctx->sock = sock;
1158 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1159 proto_ctx->dest_id_type = ctx->dest_id_type;
1160 proto_ctx->dest_id = ctx->dest_id;
1162 /* Resolve the authentication method used in this connection. Check if
1163 we find a match from user configured connections */
1164 if (!sconn->conn.ref_ptr)
1165 conn = silc_server_config_find_router_conn(server, sock->hostname,
1168 conn = sconn->conn.ref_ptr;
1171 /* Match found. Use the configured authentication method. Take only
1172 the passphrase, since for public key auth we automatically use
1173 our local key pair. */
1174 if (conn->passphrase) {
1175 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1176 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1178 proto_ctx->auth_data = strdup(conn->passphrase);
1179 proto_ctx->auth_data_len = strlen(conn->passphrase);
1180 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1182 } else if (conn->publickeys) {
1183 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1185 proto_ctx->auth_meth = SILC_AUTH_NONE;
1188 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1189 sock->hostname, sock->ip, sock->port));
1190 silc_protocol_free(protocol);
1191 sock->protocol = NULL;
1193 silc_packet_context_free(ctx->packet);
1195 silc_ske_free(ctx->ske);
1196 silc_free(ctx->dest_id);
1198 silc_server_config_unref(&sconn->conn);
1199 silc_free(sconn->remote_host);
1200 silc_free(sconn->backup_replace_ip);
1202 silc_schedule_task_del_by_callback(server->schedule,
1203 silc_server_failure_callback);
1204 silc_server_disconnect_remote(server, sock,
1205 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1209 /* Free old protocol as it is finished now */
1210 silc_protocol_free(protocol);
1212 silc_packet_context_free(ctx->packet);
1214 sock->protocol = NULL;
1216 /* Allocate the authentication protocol. This is allocated here
1217 but we won't start it yet. We will be receiving party of this
1218 protocol thus we will wait that connecting party will make
1219 their first move. */
1220 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1221 &sock->protocol, proto_ctx,
1222 silc_server_connect_to_router_final);
1224 /* Register timeout task. If the protocol is not executed inside
1225 this timelimit the connection will be terminated. */
1226 proto_ctx->timeout_task =
1227 silc_schedule_task_add(server->schedule, sock->sock,
1228 silc_server_timeout_remote,
1230 server->config->conn_auth_timeout, 0,
1234 /* Run the protocol */
1235 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1238 /* Finalizes the connection to router. Registers a server task to the
1239 queue so that we can accept new connections. */
1241 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1243 SilcProtocol protocol = (SilcProtocol)context;
1244 SilcServerConnAuthInternalContext *ctx =
1245 (SilcServerConnAuthInternalContext *)protocol->context;
1246 SilcServer server = (SilcServer)ctx->server;
1247 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1248 SilcSocketConnection sock = ctx->sock;
1249 SilcServerEntry id_entry = NULL;
1251 SilcServerHBContext hb_context;
1252 unsigned char *id_string;
1254 SilcIDListData idata;
1255 SilcServerConfigRouter *conn = NULL;
1256 SilcServerConfigConnParams *param = NULL;
1258 SILC_LOG_DEBUG(("Start"));
1260 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1261 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1262 /* Error occured during protocol */
1263 silc_free(ctx->dest_id);
1264 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1267 /* Try reconnecting if configuration wants it */
1268 if (!sconn->no_reconnect) {
1269 silc_schedule_task_add(server->schedule, 0,
1270 silc_server_connect_to_router_retry,
1271 sconn, 0, 1, SILC_TASK_TIMEOUT,
1272 SILC_TASK_PRI_NORMAL);
1279 /* Add a task to the queue. This task receives new connections to the
1280 server. This task remains on the queue until the end of the program. */
1281 if (!server->listenning && !sconn->backup) {
1282 silc_schedule_task_add(server->schedule, server->sock,
1283 silc_server_accept_new_connection,
1284 (void *)server, 0, 0,
1286 SILC_TASK_PRI_NORMAL);
1287 server->listenning = TRUE;
1290 /* Send NEW_SERVER packet to the router. We will become registered
1291 to the SILC network after sending this packet. */
1292 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1293 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1294 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1295 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1296 silc_buffer_format(packet,
1297 SILC_STR_UI_SHORT(id_len),
1298 SILC_STR_UI_XNSTRING(id_string, id_len),
1299 SILC_STR_UI_SHORT(strlen(server->server_name)),
1300 SILC_STR_UI_XNSTRING(server->server_name,
1301 strlen(server->server_name)),
1304 /* Send the packet */
1305 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1306 packet->data, packet->len, TRUE);
1307 silc_buffer_free(packet);
1308 silc_free(id_string);
1310 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1312 /* Check that we do not have this ID already */
1313 id_entry = silc_idlist_find_server_by_id(server->local_list,
1314 ctx->dest_id, TRUE, NULL);
1316 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1318 id_entry = silc_idlist_find_server_by_id(server->global_list,
1319 ctx->dest_id, TRUE, NULL);
1321 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1324 SILC_LOG_DEBUG(("New server id(%s)",
1325 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1327 /* Add the connected router to global server list. Router is sent
1328 as NULL since it's local to us. */
1329 id_entry = silc_idlist_add_server(server->global_list,
1330 strdup(sock->hostname),
1331 SILC_ROUTER, ctx->dest_id, NULL, sock);
1333 silc_free(ctx->dest_id);
1334 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1335 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1340 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1341 silc_free(sock->user_data);
1342 sock->user_data = (void *)id_entry;
1343 sock->type = SILC_SOCKET_TYPE_ROUTER;
1344 idata = (SilcIDListData)sock->user_data;
1345 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1346 SILC_IDLIST_STATUS_LOCAL);
1348 conn = sconn->conn.ref_ptr;
1349 param = &server->config->param;
1350 if (conn && conn->param)
1351 param = conn->param;
1353 /* Perform keepalive. The `hb_context' will be freed automatically
1354 when finally calling the silc_socket_free function. */
1355 hb_context = silc_calloc(1, sizeof(*hb_context));
1356 hb_context->server = server;
1357 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1358 silc_server_perform_heartbeat,
1361 /* Register re-key timeout */
1362 idata->rekey->timeout = param->key_exchange_rekey;
1363 idata->rekey->context = (void *)server;
1364 silc_schedule_task_add(server->schedule, sock->sock,
1365 silc_server_rekey_callback,
1366 (void *)sock, idata->rekey->timeout, 0,
1367 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1369 if (!sconn->backup) {
1370 /* Mark this router our primary router if we're still standalone */
1371 if (server->standalone) {
1372 server->id_entry->router = id_entry;
1373 server->router = id_entry;
1374 server->standalone = FALSE;
1376 /* If we are router then announce our possible servers. Backup
1377 router announces also global servers. */
1378 if (server->server_type == SILC_ROUTER)
1379 silc_server_announce_servers(server,
1380 server->backup_router ? TRUE : FALSE,
1381 0, SILC_PRIMARY_ROUTE(server));
1383 /* Announce our clients and channels to the router */
1384 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1385 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1387 /* If we are backup router then this primary router is whom we are
1389 if (server->server_type == SILC_BACKUP_ROUTER)
1390 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1393 /* Add this server to be our backup router */
1394 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1395 sconn->backup_replace_port, FALSE);
1398 sock->protocol = NULL;
1401 /* Call the completion callback to indicate that we've connected to
1403 if (sconn && sconn->callback)
1404 (*sconn->callback)(server, id_entry, sconn->callback_context);
1406 /* Free the temporary connection data context */
1408 silc_server_config_unref(&sconn->conn);
1409 silc_free(sconn->remote_host);
1410 silc_free(sconn->backup_replace_ip);
1413 if (sconn == server->router_conn)
1414 server->router_conn = NULL;
1417 /* Free the protocol object */
1418 if (sock->protocol == protocol)
1419 sock->protocol = NULL;
1420 silc_protocol_free(protocol);
1422 silc_packet_context_free(ctx->packet);
1424 silc_ske_free(ctx->ske);
1425 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1426 silc_free(ctx->auth_data);
1430 /* Host lookup callback that is called after the incoming connection's
1431 IP and FQDN lookup is performed. This will actually check the acceptance
1432 of the incoming connection and will register the key exchange protocol
1433 for this connection. */
1436 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1439 SilcServerKEInternalContext *proto_ctx =
1440 (SilcServerKEInternalContext *)context;
1441 SilcServer server = (SilcServer)proto_ctx->server;
1442 SilcServerConfigClient *cconfig = NULL;
1443 SilcServerConfigServer *sconfig = NULL;
1444 SilcServerConfigRouter *rconfig = NULL;
1445 SilcServerConfigDeny *deny;
1448 context = (void *)server;
1450 /* Check whether we could resolve both IP and FQDN. */
1451 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1452 server->config->require_reverse_lookup)) {
1453 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1454 sock->hostname ? sock->hostname :
1455 sock->ip ? sock->ip : ""));
1456 server->stat.conn_failures++;
1457 silc_server_disconnect_remote(server, sock,
1458 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1459 "Unknown host or IP");
1460 silc_free(proto_ctx);
1464 /* Register the connection for network input and output. This sets
1465 that scheduler will listen for incoming packets for this connection
1466 and sets that outgoing packets may be sent to this connection as well.
1467 However, this doesn't set the scheduler for outgoing traffic, it
1468 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1469 later when outgoing data is available. */
1470 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1472 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1475 /* Listenning port */
1476 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1477 silc_server_disconnect_remote(server, sock,
1478 SILC_STATUS_ERR_RESOURCE_LIMIT,
1479 "Connection refused");
1480 server->stat.conn_failures++;
1481 silc_free(proto_ctx);
1484 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1486 /* Check whether this connection is denied to connect to us. */
1487 deny = silc_server_config_find_denied(server, sock->ip);
1489 deny = silc_server_config_find_denied(server, sock->hostname);
1491 /* The connection is denied */
1492 SILC_LOG_INFO(("Connection %s (%s) is denied",
1493 sock->hostname, sock->ip));
1494 silc_server_disconnect_remote(server, sock,
1495 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1497 server->stat.conn_failures++;
1498 silc_free(proto_ctx);
1502 /* Check whether we have configured this sort of connection at all. We
1503 have to check all configurations since we don't know what type of
1504 connection this is. */
1505 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1506 cconfig = silc_server_config_find_client(server, sock->hostname);
1507 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1508 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1509 if (server->server_type == SILC_ROUTER) {
1510 if (!(rconfig = silc_server_config_find_router_conn(server,
1511 sock->ip, sock->port)))
1512 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1515 if (!cconfig && !sconfig && !rconfig) {
1516 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1518 silc_server_disconnect_remote(server, sock,
1519 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1520 server->stat.conn_failures++;
1521 silc_free(proto_ctx);
1525 /* The connection is allowed */
1527 /* Set internal context for key exchange protocol. This is
1528 sent as context for the protocol. */
1529 proto_ctx->sock = sock;
1530 proto_ctx->rng = server->rng;
1531 proto_ctx->responder = TRUE;
1532 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1533 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1534 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1536 /* Take flags for key exchange. Since we do not know what type of connection
1537 this is, we go through all found configurations and use the global ones
1538 as well. This will result always into strictest key exchange flags. */
1539 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1540 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1541 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1542 if (server->config->param.key_exchange_pfs)
1543 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1545 /* Prepare the connection for key exchange protocol. We allocate the
1546 protocol but will not start it yet. The connector will be the
1547 initiator of the protocol thus we will wait for initiation from
1548 there before we start the protocol. */
1549 server->stat.auth_attempts++;
1550 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1551 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1552 &sock->protocol, proto_ctx,
1553 silc_server_accept_new_connection_second);
1555 /* Register a timeout task that will be executed if the connector
1556 will not start the key exchange protocol within specified timeout
1557 and the connection will be closed. */
1558 proto_ctx->timeout_task =
1559 silc_schedule_task_add(server->schedule, sock->sock,
1560 silc_server_timeout_remote,
1562 server->config->key_exchange_timeout, 0,
1567 /* Accepts new connections to the server. Accepting new connections are
1568 done in three parts to make it async. */
1570 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1572 SilcServer server = (SilcServer)context;
1573 SilcSocketConnection newsocket;
1574 SilcServerKEInternalContext *proto_ctx;
1577 SILC_LOG_DEBUG(("Accepting new connection"));
1579 server->stat.conn_attempts++;
1581 sock = silc_net_accept_connection(fd);
1583 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1584 server->stat.conn_failures++;
1588 /* Check for maximum allowed connections */
1589 if (sock > server->config->param.connections_max) {
1590 SILC_LOG_ERROR(("Refusing connection, server is full"));
1591 server->stat.conn_failures++;
1592 silc_net_close_connection(sock);
1596 /* Set socket options */
1597 silc_net_set_socket_nonblock(sock);
1598 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1600 /* We don't create a ID yet, since we don't know what type of connection
1601 this is yet. But, we do add the connection to the socket table. */
1602 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1603 server->sockets[sock] = newsocket;
1605 /* Perform asynchronous host lookup. This will lookup the IP and the
1606 FQDN of the remote connection. After the lookup is done the connection
1607 is accepted further. */
1608 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1609 proto_ctx->server = server;
1610 proto_ctx->context = (void *)fd;
1611 silc_socket_host_lookup(newsocket, TRUE,
1612 silc_server_accept_new_connection_lookup,
1613 (void *)proto_ctx, server->schedule);
1616 /* Second part of accepting new connection. Key exchange protocol has been
1617 performed and now it is time to do little connection authentication
1618 protocol to figure out whether this connection is client or server
1619 and whether it has right to access this server (especially server
1620 connections needs to be authenticated). */
1622 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1624 SilcProtocol protocol = (SilcProtocol)context;
1625 SilcServerKEInternalContext *ctx =
1626 (SilcServerKEInternalContext *)protocol->context;
1627 SilcServer server = (SilcServer)ctx->server;
1628 SilcSocketConnection sock = ctx->sock;
1629 SilcServerConnAuthInternalContext *proto_ctx;
1631 SILC_LOG_DEBUG(("Start"));
1633 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1634 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1635 /* Error occured during protocol */
1636 SILC_LOG_DEBUG(("Error key exchange protocol"));
1637 silc_protocol_free(protocol);
1638 sock->protocol = NULL;
1639 silc_ske_free_key_material(ctx->keymat);
1641 silc_packet_context_free(ctx->packet);
1643 silc_ske_free(ctx->ske);
1644 silc_free(ctx->dest_id);
1645 silc_server_config_unref(&ctx->cconfig);
1646 silc_server_config_unref(&ctx->sconfig);
1647 silc_server_config_unref(&ctx->rconfig);
1649 silc_schedule_task_del_by_callback(server->schedule,
1650 silc_server_failure_callback);
1651 silc_server_disconnect_remote(server, sock,
1652 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1654 server->stat.auth_failures++;
1658 /* We now have the key material as the result of the key exchange
1659 protocol. Take the key material into use. Free the raw key material
1660 as soon as we've set them into use. */
1661 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1662 ctx->sock, ctx->keymat,
1663 ctx->ske->prop->cipher,
1664 ctx->ske->prop->pkcs,
1665 ctx->ske->prop->hash,
1666 ctx->ske->prop->hmac,
1667 ctx->ske->prop->group,
1669 SILC_LOG_ERROR(("Error setting key material in use"));
1670 silc_protocol_free(protocol);
1671 sock->protocol = NULL;
1672 silc_ske_free_key_material(ctx->keymat);
1674 silc_packet_context_free(ctx->packet);
1676 silc_ske_free(ctx->ske);
1677 silc_free(ctx->dest_id);
1678 silc_server_config_unref(&ctx->cconfig);
1679 silc_server_config_unref(&ctx->sconfig);
1680 silc_server_config_unref(&ctx->rconfig);
1682 silc_schedule_task_del_by_callback(server->schedule,
1683 silc_server_failure_callback);
1684 silc_server_disconnect_remote(server, sock,
1685 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1686 server->stat.auth_failures++;
1689 silc_ske_free_key_material(ctx->keymat);
1691 /* Allocate internal context for the authentication protocol. This
1692 is sent as context for the protocol. */
1693 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1694 proto_ctx->server = (void *)server;
1695 proto_ctx->sock = sock;
1696 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1697 proto_ctx->responder = TRUE;
1698 proto_ctx->dest_id_type = ctx->dest_id_type;
1699 proto_ctx->dest_id = ctx->dest_id;
1700 proto_ctx->cconfig = ctx->cconfig;
1701 proto_ctx->sconfig = ctx->sconfig;
1702 proto_ctx->rconfig = ctx->rconfig;
1704 /* Free old protocol as it is finished now */
1705 silc_protocol_free(protocol);
1707 silc_packet_context_free(ctx->packet);
1709 sock->protocol = NULL;
1711 /* Allocate the authentication protocol. This is allocated here
1712 but we won't start it yet. We will be receiving party of this
1713 protocol thus we will wait that connecting party will make
1714 their first move. */
1715 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1716 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1717 &sock->protocol, proto_ctx,
1718 silc_server_accept_new_connection_final);
1720 /* Register timeout task. If the protocol is not executed inside
1721 this timelimit the connection will be terminated. */
1722 proto_ctx->timeout_task =
1723 silc_schedule_task_add(server->schedule, sock->sock,
1724 silc_server_timeout_remote,
1726 server->config->conn_auth_timeout, 0,
1731 /* After this is called, server don't wait for backup router anymore.
1732 This gets called automatically even after we have backup router
1733 connection established. */
1735 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1737 SilcServer server = context;
1738 server->wait_backup = FALSE;
1741 /* Final part of accepting new connection. The connection has now
1742 been authenticated and keys has been exchanged. We also know whether
1743 this is client or server connection. */
1745 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1747 SilcProtocol protocol = (SilcProtocol)context;
1748 SilcServerConnAuthInternalContext *ctx =
1749 (SilcServerConnAuthInternalContext *)protocol->context;
1750 SilcServer server = (SilcServer)ctx->server;
1751 SilcSocketConnection sock = ctx->sock;
1752 SilcServerHBContext hb_context;
1753 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1755 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1757 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1758 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1759 /* Error occured during protocol */
1760 SILC_LOG_DEBUG(("Error during authentication protocol"));
1761 silc_protocol_free(protocol);
1762 sock->protocol = NULL;
1764 silc_packet_context_free(ctx->packet);
1766 silc_ske_free(ctx->ske);
1767 silc_free(ctx->dest_id);
1768 silc_server_config_unref(&ctx->cconfig);
1769 silc_server_config_unref(&ctx->sconfig);
1770 silc_server_config_unref(&ctx->rconfig);
1772 silc_schedule_task_del_by_callback(server->schedule,
1773 silc_server_failure_callback);
1774 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1776 server->stat.auth_failures++;
1780 entry->data.last_receive = time(NULL);
1782 switch (ctx->conn_type) {
1783 case SILC_SOCKET_TYPE_CLIENT:
1785 SilcClientEntry client;
1786 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1788 /* Verify whether this connection is after all allowed to connect */
1789 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1790 &server->config->param,
1791 conn->param, ctx->ske)) {
1792 server->stat.auth_failures++;
1796 /* If we are primary router and we have backup router configured
1797 but it has not connected to use yet, do not accept any other
1799 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1800 !server->backup_router) {
1801 SilcServerConfigRouter *router;
1802 router = silc_server_config_get_backup_router(server);
1803 if (router && strcmp(server->config->server_info->primary->server_ip,
1805 silc_server_find_socket_by_host(server,
1806 SILC_SOCKET_TYPE_SERVER,
1807 router->backup_replace_ip, 0)) {
1808 SILC_LOG_INFO(("Will not accept connections because we do "
1809 "not have backup router connection established"));
1810 silc_server_disconnect_remote(server, sock,
1811 SILC_STATUS_ERR_PERM_DENIED,
1812 "We do not have connection to backup "
1813 "router established, try later");
1814 silc_free(sock->user_data);
1815 server->stat.auth_failures++;
1817 /* From here on, wait 10 seconds for the backup router to appear. */
1818 silc_schedule_task_add(server->schedule, 0,
1819 silc_server_backup_router_wait,
1820 (void *)server, 10, 0,
1821 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1826 SILC_LOG_DEBUG(("Remote host is client"));
1827 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1830 /* Add the client to the client ID cache. The nickname and Client ID
1831 and other information is created after we have received NEW_CLIENT
1832 packet from client. */
1833 client = silc_idlist_add_client(server->local_list,
1834 NULL, NULL, NULL, NULL, NULL, sock, 0);
1836 SILC_LOG_ERROR(("Could not add new client to cache"));
1837 silc_free(sock->user_data);
1838 silc_server_disconnect_remote(server, sock,
1839 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1840 server->stat.auth_failures++;
1843 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1846 server->stat.my_clients++;
1847 server->stat.clients++;
1848 server->stat.cell_clients++;
1850 /* Get connection parameters */
1852 if (conn->param->keepalive_secs)
1853 hearbeat_timeout = conn->param->keepalive_secs;
1856 id_entry = (void *)client;
1859 case SILC_SOCKET_TYPE_SERVER:
1860 case SILC_SOCKET_TYPE_ROUTER:
1862 SilcServerEntry new_server;
1863 bool initiator = FALSE;
1864 bool backup_local = FALSE;
1865 bool backup_router = FALSE;
1866 char *backup_replace_ip = NULL;
1867 SilcUInt16 backup_replace_port = 0;
1868 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1869 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1871 /* If we are backup router and this is incoming server connection
1872 and we do not have connection to primary router, do not allow
1874 if (server->server_type == SILC_BACKUP_ROUTER &&
1875 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1876 !SILC_PRIMARY_ROUTE(server)) {
1877 SILC_LOG_INFO(("Will not accept server connection because we do "
1878 "not have primary router connection established"));
1879 silc_server_disconnect_remote(server, sock,
1880 SILC_STATUS_ERR_PERM_DENIED,
1881 "We do not have connection to primary "
1882 "router established, try later");
1883 silc_free(sock->user_data);
1884 server->stat.auth_failures++;
1888 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1889 /* Verify whether this connection is after all allowed to connect */
1890 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1891 &server->config->param,
1892 rconn ? rconn->param : NULL,
1894 silc_free(sock->user_data);
1895 server->stat.auth_failures++;
1901 if (rconn->param->keepalive_secs)
1902 hearbeat_timeout = rconn->param->keepalive_secs;
1905 initiator = rconn->initiator;
1906 backup_local = rconn->backup_local;
1907 backup_router = rconn->backup_router;
1908 backup_replace_ip = rconn->backup_replace_ip;
1909 backup_replace_port = rconn->backup_replace_port;
1913 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1914 /* Verify whether this connection is after all allowed to connect */
1915 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1916 &server->config->param,
1917 sconn ? sconn->param : NULL,
1919 silc_free(sock->user_data);
1920 server->stat.auth_failures++;
1925 if (sconn->param->keepalive_secs)
1926 hearbeat_timeout = sconn->param->keepalive_secs;
1929 backup_router = sconn->backup_router;
1933 /* If we are primary router and we have backup router configured
1934 but it has not connected to use yet, do not accept any other
1936 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1937 !server->backup_router && !backup_router) {
1938 SilcServerConfigRouter *router;
1939 router = silc_server_config_get_backup_router(server);
1940 if (router && strcmp(server->config->server_info->primary->server_ip,
1942 silc_server_find_socket_by_host(server,
1943 SILC_SOCKET_TYPE_SERVER,
1944 router->backup_replace_ip, 0)) {
1945 SILC_LOG_INFO(("Will not accept connections because we do "
1946 "not have backup router connection established"));
1947 silc_server_disconnect_remote(server, sock,
1948 SILC_STATUS_ERR_PERM_DENIED,
1949 "We do not have connection to backup "
1950 "router established, try later");
1951 silc_free(sock->user_data);
1952 server->stat.auth_failures++;
1954 /* From here on, wait 10 seconds for the backup router to appear. */
1955 silc_schedule_task_add(server->schedule, 0,
1956 silc_server_backup_router_wait,
1957 (void *)server, 10, 0,
1958 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1963 SILC_LOG_DEBUG(("Remote host is %s",
1964 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1965 "server" : (backup_router ?
1966 "backup router" : "router")));
1967 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1968 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1969 "server" : (backup_router ?
1970 "backup router" : "router")));
1972 /* Add the server into server cache. The server name and Server ID
1973 is updated after we have received NEW_SERVER packet from the
1974 server. We mark ourselves as router for this server if we really
1977 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1978 server->local_list : (backup_router ?
1979 server->local_list :
1980 server->global_list)),
1982 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1983 SILC_SERVER : SILC_ROUTER),
1985 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1986 server->id_entry : (backup_router ?
1987 server->id_entry : NULL)),
1990 SILC_LOG_ERROR(("Could not add new server to cache"));
1991 silc_free(sock->user_data);
1992 silc_server_disconnect_remote(server, sock,
1993 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1994 server->stat.auth_failures++;
1997 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1999 id_entry = (void *)new_server;
2001 /* If the incoming connection is router and marked as backup router
2002 then add it to be one of our backups */
2003 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2004 /* Change it back to SERVER type since that's what it really is. */
2006 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2007 new_server->server_type = SILC_BACKUP_ROUTER;
2009 /* Remove the backup waiting with timeout */
2010 silc_schedule_task_add(server->schedule, 0,
2011 silc_server_backup_router_wait,
2012 (void *)server, 5, 0,
2013 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2017 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2018 server->stat.my_servers++;
2020 server->stat.my_routers++;
2021 server->stat.routers++;
2023 server->stat.servers++;
2025 /* Check whether this connection is to be our primary router connection
2026 if we do not already have the primary route. */
2027 if (!backup_router &&
2028 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2029 if (silc_server_config_is_primary_route(server) && !initiator)
2032 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2033 server->standalone = FALSE;
2034 if (!server->id_entry->router) {
2035 server->id_entry->router = id_entry;
2036 server->router = id_entry;
2047 sock->type = ctx->conn_type;
2049 /* Add the common data structure to the ID entry. */
2050 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2052 /* Add to sockets internal pointer for fast referencing */
2053 silc_free(sock->user_data);
2054 sock->user_data = id_entry;
2056 /* Connection has been fully established now. Everything is ok. */
2057 SILC_LOG_DEBUG(("New connection authenticated"));
2059 /* Perform keepalive. The `hb_context' will be freed automatically
2060 when finally calling the silc_socket_free function. */
2061 hb_context = silc_calloc(1, sizeof(*hb_context));
2062 hb_context->server = server;
2063 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
2064 silc_server_perform_heartbeat,
2068 silc_schedule_task_del_by_callback(server->schedule,
2069 silc_server_failure_callback);
2070 silc_protocol_free(protocol);
2072 silc_packet_context_free(ctx->packet);
2074 silc_ske_free(ctx->ske);
2075 silc_free(ctx->dest_id);
2076 silc_server_config_unref(&ctx->cconfig);
2077 silc_server_config_unref(&ctx->sconfig);
2078 silc_server_config_unref(&ctx->rconfig);
2080 sock->protocol = NULL;
2083 /* This function is used to read packets from network and send packets to
2084 network. This is usually a generic task. */
2086 SILC_TASK_CALLBACK(silc_server_packet_process)
2088 SilcServer server = (SilcServer)context;
2089 SilcSocketConnection sock = server->sockets[fd];
2090 SilcIDListData idata;
2091 SilcCipher cipher = NULL;
2092 SilcHmac hmac = NULL;
2093 SilcUInt32 sequence = 0;
2097 SILC_LOG_DEBUG(("Unknown socket connection"));
2101 /* Packet sending */
2103 if (type == SILC_TASK_WRITE) {
2104 /* Do not send data to disconnected connection */
2105 if (SILC_IS_DISCONNECTED(sock)) {
2106 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2110 server->stat.packets_sent++;
2112 /* Send the packet */
2113 ret = silc_packet_send(sock, TRUE);
2115 /* If returned -2 could not write to connection now, will do
2121 SILC_LOG_ERROR(("Error sending packet to connection "
2122 "%s:%d [%s]", sock->hostname, sock->port,
2123 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2124 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2125 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2130 /* The packet has been sent and now it is time to set the connection
2131 back to only for input. When there is again some outgoing data
2132 available for this connection it will be set for output as well.
2133 This call clears the output setting and sets it only for input. */
2134 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2135 SILC_UNSET_OUTBUF_PENDING(sock);
2137 silc_buffer_clear(sock->outbuf);
2141 /* Packet receiving */
2143 /* Read some data from connection */
2144 ret = silc_packet_receive(sock);
2148 SILC_LOG_ERROR(("Error receiving packet from connection "
2149 "%s:%d [%s] %s", sock->hostname, sock->port,
2150 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2151 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2152 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2153 "Router"), strerror(errno)));
2159 SILC_LOG_DEBUG(("Read EOF"));
2161 /* If connection is disconnecting already we will finally
2162 close the connection */
2163 if (SILC_IS_DISCONNECTING(sock)) {
2164 if (sock->user_data)
2165 silc_server_free_sock_user_data(server, sock, NULL);
2166 silc_server_close_connection(server, sock);
2170 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2171 SILC_SET_DISCONNECTING(sock);
2173 if (sock->user_data) {
2175 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2176 silc_server_free_sock_user_data(server, sock, tmp);
2178 silc_server_free_sock_user_data(server, sock, NULL);
2179 } else if (server->router_conn && server->router_conn->sock == sock &&
2180 !server->router && server->standalone)
2181 silc_schedule_task_add(server->schedule, 0,
2182 silc_server_connect_to_router,
2185 SILC_TASK_PRI_NORMAL);
2187 silc_server_close_connection(server, sock);
2191 /* If connection is disconnecting or disconnected we will ignore
2193 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2194 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2198 /* Get keys and stuff from ID entry */
2199 idata = (SilcIDListData)sock->user_data;
2201 cipher = idata->receive_key;
2202 hmac = idata->hmac_receive;
2203 sequence = idata->psn_receive;
2206 /* Process the packet. This will call the parser that will then
2207 decrypt and parse the packet. */
2208 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2209 TRUE : FALSE, cipher, hmac, sequence,
2210 silc_server_packet_parse, server);
2212 /* If this socket connection is not authenticated yet and the packet
2213 processing failed we will drop the connection since it can be
2214 a malicious flooder. */
2215 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2216 (!sock->protocol || sock->protocol->protocol->type ==
2217 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2218 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2219 SILC_SET_DISCONNECTING(sock);
2221 if (sock->user_data)
2222 silc_server_free_sock_user_data(server, sock, NULL);
2223 silc_server_close_connection(server, sock);
2227 /* Parses whole packet, received earlier. */
2229 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2231 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2232 SilcServer server = (SilcServer)parse_ctx->context;
2233 SilcSocketConnection sock = parse_ctx->sock;
2234 SilcPacketContext *packet = parse_ctx->packet;
2235 SilcIDListData idata = (SilcIDListData)sock->user_data;
2238 server->stat.packets_received++;
2240 /* Parse the packet */
2241 if (parse_ctx->normal)
2242 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2244 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2246 /* If entry is disabled ignore what we got. */
2247 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2248 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2249 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2250 SILC_LOG_DEBUG(("Connection is disabled"));
2254 if (ret == SILC_PACKET_NONE) {
2255 SILC_LOG_DEBUG(("Error parsing packet"));
2259 /* Check that the the current client ID is same as in the client's packet. */
2260 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2261 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2262 if (client && client->id && packet->src_id) {
2263 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2264 packet->src_id_type);
2265 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2267 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2274 if (server->server_type == SILC_ROUTER) {
2275 /* Route the packet if it is not destined to us. Other ID types but
2276 server are handled separately after processing them. */
2277 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2278 packet->dst_id_type == SILC_ID_SERVER &&
2279 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2280 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2282 /* Route the packet to fastest route for the destination ID */
2283 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2284 packet->dst_id_type);
2287 silc_server_packet_route(server,
2288 silc_server_route_get(server, id,
2289 packet->dst_id_type),
2296 /* Parse the incoming packet type */
2297 silc_server_packet_parse_type(server, sock, packet);
2299 /* Broadcast packet if it is marked as broadcast packet and it is
2300 originated from router and we are router. */
2301 if (server->server_type == SILC_ROUTER &&
2302 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2303 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2304 /* Broadcast to our primary route */
2305 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2307 /* If we have backup routers then we need to feed all broadcast
2308 data to those servers. */
2309 silc_server_backup_broadcast(server, sock, packet);
2313 silc_packet_context_free(packet);
2314 silc_free(parse_ctx);
2317 /* Parser callback called by silc_packet_receive_process. This merely
2318 registers timeout that will handle the actual parsing when appropriate. */
2320 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2323 SilcServer server = (SilcServer)context;
2324 SilcSocketConnection sock = parser_context->sock;
2325 SilcIDListData idata = (SilcIDListData)sock->user_data;
2328 idata->psn_receive = parser_context->packet->sequence + 1;
2330 /* If protocol for this connection is key exchange or rekey then we'll
2331 process all packets synchronously, since there might be packets in
2332 queue that we are not able to decrypt without first processing the
2333 packets before them. */
2334 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2335 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2336 (sock->protocol && sock->protocol->protocol &&
2337 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2338 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2339 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2342 /* Reprocess data since we'll return FALSE here. This is because
2343 the idata->receive_key might have become valid in the last packet
2344 and we want to call this processor with valid cipher. */
2346 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2347 TRUE : FALSE, idata->receive_key,
2348 idata->hmac_receive, idata->psn_receive,
2349 silc_server_packet_parse, server);
2351 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2352 TRUE : FALSE, NULL, NULL, 0,
2353 silc_server_packet_parse, server);
2357 switch (sock->type) {
2358 case SILC_SOCKET_TYPE_UNKNOWN:
2359 case SILC_SOCKET_TYPE_CLIENT:
2360 /* Parse the packet with timeout */
2361 silc_schedule_task_add(server->schedule, sock->sock,
2362 silc_server_packet_parse_real,
2363 (void *)parser_context, 0, 100000,
2365 SILC_TASK_PRI_NORMAL);
2367 case SILC_SOCKET_TYPE_SERVER:
2368 case SILC_SOCKET_TYPE_ROUTER:
2369 /* Packets from servers are parsed immediately */
2370 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2380 /* Parses the packet type and calls what ever routines the packet type
2381 requires. This is done for all incoming packets. */
2383 void silc_server_packet_parse_type(SilcServer server,
2384 SilcSocketConnection sock,
2385 SilcPacketContext *packet)
2387 SilcPacketType type = packet->type;
2388 SilcIDListData idata = (SilcIDListData)sock->user_data;
2390 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2391 silc_get_packet_name(type), packet->flags));
2393 /* Parse the packet type */
2395 case SILC_PACKET_DISCONNECT:
2398 char *message = NULL;
2400 if (packet->flags & SILC_PACKET_FLAG_LIST)
2402 if (packet->buffer->len < 1)
2405 status = (SilcStatus)packet->buffer->data[0];
2406 if (packet->buffer->len > 1 &&
2407 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2408 message = silc_memdup(packet->buffer->data + 1,
2409 packet->buffer->len - 1);
2411 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2412 sock->ip, sock->hostname,
2413 silc_get_status_message(status), status,
2414 message ? message : ""));
2417 /* Handle the disconnection from our end too */
2418 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2419 silc_server_free_sock_user_data(server, sock, NULL);
2420 silc_server_close_connection(server, sock);
2424 case SILC_PACKET_SUCCESS:
2426 * Success received for something. For now we can have only
2427 * one protocol for connection executing at once hence this
2428 * success message is for whatever protocol is executing currently.
2430 if (packet->flags & SILC_PACKET_FLAG_LIST)
2433 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2436 case SILC_PACKET_FAILURE:
2438 * Failure received for something. For now we can have only
2439 * one protocol for connection executing at once hence this
2440 * failure message is for whatever protocol is executing currently.
2442 if (packet->flags & SILC_PACKET_FLAG_LIST)
2444 if (sock->protocol) {
2445 SilcServerFailureContext f;
2446 f = silc_calloc(1, sizeof(*f));
2450 /* We will wait 5 seconds to process this failure packet */
2451 silc_schedule_task_add(server->schedule, sock->sock,
2452 silc_server_failure_callback, (void *)f, 5, 0,
2453 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2457 case SILC_PACKET_REJECT:
2458 if (packet->flags & SILC_PACKET_FLAG_LIST)
2463 case SILC_PACKET_NOTIFY:
2465 * Received notify packet. Server can receive notify packets from
2466 * router. Server then relays the notify messages to clients if needed.
2468 if (packet->flags & SILC_PACKET_FLAG_LIST)
2469 silc_server_notify_list(server, sock, packet);
2471 silc_server_notify(server, sock, packet);
2477 case SILC_PACKET_CHANNEL_MESSAGE:
2479 * Received channel message. Channel messages are special packets
2480 * (although probably most common ones) thus they are handled
2483 if (packet->flags & SILC_PACKET_FLAG_LIST)
2485 idata->last_receive = time(NULL);
2486 silc_server_channel_message(server, sock, packet);
2489 case SILC_PACKET_CHANNEL_KEY:
2491 * Received key for channel. As channels are created by the router
2492 * the keys are as well. We will distribute the key to all of our
2493 * locally connected clients on the particular channel. Router
2494 * never receives this channel and thus is ignored.
2496 if (packet->flags & SILC_PACKET_FLAG_LIST)
2498 silc_server_channel_key(server, sock, packet);
2504 case SILC_PACKET_COMMAND:
2506 * Recived command. Processes the command request and allocates the
2507 * command context and calls the command.
2509 if (packet->flags & SILC_PACKET_FLAG_LIST)
2511 silc_server_command_process(server, sock, packet);
2514 case SILC_PACKET_COMMAND_REPLY:
2516 * Received command reply packet. Received command reply to command. It
2517 * may be reply to command sent by us or reply to command sent by client
2518 * that we've routed further.
2520 if (packet->flags & SILC_PACKET_FLAG_LIST)
2522 silc_server_command_reply(server, sock, packet);
2526 * Private Message packets
2528 case SILC_PACKET_PRIVATE_MESSAGE:
2530 * Received private message packet. The packet is coming from either
2533 if (packet->flags & SILC_PACKET_FLAG_LIST)
2535 idata->last_receive = time(NULL);
2536 silc_server_private_message(server, sock, packet);
2539 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2541 * Private message key packet.
2543 if (packet->flags & SILC_PACKET_FLAG_LIST)
2545 silc_server_private_message_key(server, sock, packet);
2549 * Key Exchange protocol packets
2551 case SILC_PACKET_KEY_EXCHANGE:
2552 if (packet->flags & SILC_PACKET_FLAG_LIST)
2555 if (sock->protocol && sock->protocol->protocol &&
2556 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2557 SilcServerKEInternalContext *proto_ctx =
2558 (SilcServerKEInternalContext *)sock->protocol->context;
2560 proto_ctx->packet = silc_packet_context_dup(packet);
2562 /* Let the protocol handle the packet */
2563 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2565 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2566 "protocol active, packet dropped."));
2570 case SILC_PACKET_KEY_EXCHANGE_1:
2571 if (packet->flags & SILC_PACKET_FLAG_LIST)
2574 if (sock->protocol && sock->protocol->protocol &&
2575 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2576 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2578 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2579 SilcServerRekeyInternalContext *proto_ctx =
2580 (SilcServerRekeyInternalContext *)sock->protocol->context;
2582 if (proto_ctx->packet)
2583 silc_packet_context_free(proto_ctx->packet);
2585 proto_ctx->packet = silc_packet_context_dup(packet);
2587 /* Let the protocol handle the packet */
2588 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2590 SilcServerKEInternalContext *proto_ctx =
2591 (SilcServerKEInternalContext *)sock->protocol->context;
2593 if (proto_ctx->packet)
2594 silc_packet_context_free(proto_ctx->packet);
2596 proto_ctx->packet = silc_packet_context_dup(packet);
2597 proto_ctx->dest_id_type = packet->src_id_type;
2598 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2599 packet->src_id_type);
2600 if (!proto_ctx->dest_id)
2603 /* Let the protocol handle the packet */
2604 silc_protocol_execute(sock->protocol, server->schedule,
2608 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2609 "protocol active, packet dropped."));
2613 case SILC_PACKET_KEY_EXCHANGE_2:
2614 if (packet->flags & SILC_PACKET_FLAG_LIST)
2617 if (sock->protocol && sock->protocol->protocol &&
2618 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2619 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2621 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2622 SilcServerRekeyInternalContext *proto_ctx =
2623 (SilcServerRekeyInternalContext *)sock->protocol->context;
2625 if (proto_ctx->packet)
2626 silc_packet_context_free(proto_ctx->packet);
2628 proto_ctx->packet = silc_packet_context_dup(packet);
2630 /* Let the protocol handle the packet */
2631 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2633 SilcServerKEInternalContext *proto_ctx =
2634 (SilcServerKEInternalContext *)sock->protocol->context;
2636 if (proto_ctx->packet)
2637 silc_packet_context_free(proto_ctx->packet);
2639 proto_ctx->packet = silc_packet_context_dup(packet);
2640 proto_ctx->dest_id_type = packet->src_id_type;
2641 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2642 packet->src_id_type);
2643 if (!proto_ctx->dest_id)
2646 /* Let the protocol handle the packet */
2647 silc_protocol_execute(sock->protocol, server->schedule,
2651 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2652 "protocol active, packet dropped."));
2656 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2658 * Connection authentication request packet. When we receive this packet
2659 * we will send to the other end information about our mandatory
2660 * authentication method for the connection. This packet maybe received
2663 if (packet->flags & SILC_PACKET_FLAG_LIST)
2665 silc_server_connection_auth_request(server, sock, packet);
2669 * Connection Authentication protocol packets
2671 case SILC_PACKET_CONNECTION_AUTH:
2672 /* Start of the authentication protocol. We receive here the
2673 authentication data and will verify it. */
2674 if (packet->flags & SILC_PACKET_FLAG_LIST)
2677 if (sock->protocol && sock->protocol->protocol->type
2678 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2680 SilcServerConnAuthInternalContext *proto_ctx =
2681 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2683 proto_ctx->packet = silc_packet_context_dup(packet);
2685 /* Let the protocol handle the packet */
2686 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2688 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2689 "protocol active, packet dropped."));
2693 case SILC_PACKET_NEW_ID:
2695 * Received New ID packet. This includes some new ID that has been
2696 * created. It may be for client, server or channel. This is the way
2697 * to distribute information about new registered entities in the
2700 if (packet->flags & SILC_PACKET_FLAG_LIST)
2701 silc_server_new_id_list(server, sock, packet);
2703 silc_server_new_id(server, sock, packet);
2706 case SILC_PACKET_NEW_CLIENT:
2708 * Received new client packet. This includes client information that
2709 * we will use to create initial client ID. After creating new
2710 * ID we will send it to the client.
2712 if (packet->flags & SILC_PACKET_FLAG_LIST)
2714 silc_server_new_client(server, sock, packet);
2717 case SILC_PACKET_NEW_SERVER:
2719 * Received new server packet. This includes Server ID and some other
2720 * information that we may save. This is received after server has
2723 if (packet->flags & SILC_PACKET_FLAG_LIST)
2725 silc_server_new_server(server, sock, packet);
2728 case SILC_PACKET_NEW_CHANNEL:
2730 * Received new channel packet. Information about new channel in the
2731 * network are distributed using this packet.
2733 if (packet->flags & SILC_PACKET_FLAG_LIST)
2734 silc_server_new_channel_list(server, sock, packet);
2736 silc_server_new_channel(server, sock, packet);
2739 case SILC_PACKET_HEARTBEAT:
2741 * Received heartbeat.
2743 if (packet->flags & SILC_PACKET_FLAG_LIST)
2747 case SILC_PACKET_KEY_AGREEMENT:
2749 * Received heartbeat.
2751 if (packet->flags & SILC_PACKET_FLAG_LIST)
2753 silc_server_key_agreement(server, sock, packet);
2756 case SILC_PACKET_REKEY:
2758 * Received re-key packet. The sender wants to regenerate the session
2761 if (packet->flags & SILC_PACKET_FLAG_LIST)
2763 silc_server_rekey(server, sock, packet);
2766 case SILC_PACKET_REKEY_DONE:
2768 * The re-key is done.
2770 if (packet->flags & SILC_PACKET_FLAG_LIST)
2773 if (sock->protocol && sock->protocol->protocol &&
2774 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2776 SilcServerRekeyInternalContext *proto_ctx =
2777 (SilcServerRekeyInternalContext *)sock->protocol->context;
2779 if (proto_ctx->packet)
2780 silc_packet_context_free(proto_ctx->packet);
2782 proto_ctx->packet = silc_packet_context_dup(packet);
2784 /* Let the protocol handle the packet */
2785 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2787 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2788 "protocol active, packet dropped."));
2792 case SILC_PACKET_FTP:
2794 if (packet->flags & SILC_PACKET_FLAG_LIST)
2796 silc_server_ftp(server, sock, packet);
2799 case SILC_PACKET_RESUME_CLIENT:
2801 if (packet->flags & SILC_PACKET_FLAG_LIST)
2803 silc_server_resume_client(server, sock, packet);
2806 case SILC_PACKET_RESUME_ROUTER:
2807 /* Resume router packet received. This packet is received for backup
2808 router resuming protocol. */
2809 if (packet->flags & SILC_PACKET_FLAG_LIST)
2811 silc_server_backup_resume_router(server, sock, packet);
2815 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2820 /* Creates connection to a remote router. */
2822 void silc_server_create_connection(SilcServer server,
2823 const char *remote_host, SilcUInt32 port)
2825 SilcServerConnection sconn;
2827 /* Allocate connection object for hold connection specific stuff. */
2828 sconn = silc_calloc(1, sizeof(*sconn));
2829 sconn->server = server;
2830 sconn->remote_host = strdup(remote_host);
2831 sconn->remote_port = port;
2832 sconn->no_reconnect = TRUE;
2834 silc_schedule_task_add(server->schedule, 0,
2835 silc_server_connect_router,
2836 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2837 SILC_TASK_PRI_NORMAL);
2840 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2842 silc_socket_free(context);
2845 /* Closes connection to socket connection */
2847 void silc_server_close_connection(SilcServer server,
2848 SilcSocketConnection sock)
2852 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2853 silc_schedule_task_add(server->schedule, 0,
2854 silc_server_close_connection_final,
2855 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2856 SILC_TASK_PRI_NORMAL);
2860 memset(tmp, 0, sizeof(tmp));
2861 silc_socket_get_error(sock, tmp, sizeof(tmp));
2862 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2864 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2865 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2866 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2867 "Router"), tmp[0] ? tmp : ""));
2869 /* We won't listen for this connection anymore */
2870 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2872 /* Unregister all tasks */
2873 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2875 /* Close the actual connection */
2876 silc_net_close_connection(sock->sock);
2877 server->sockets[sock->sock] = NULL;
2879 /* If sock->user_data is NULL then we'll check for active protocols
2880 here since the silc_server_free_sock_user_data has not been called
2881 for this connection. */
2882 if (!sock->user_data) {
2883 /* If any protocol is active cancel its execution. It will call
2884 the final callback which will finalize the disconnection. */
2885 if (sock->protocol) {
2886 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2887 silc_protocol_cancel(sock->protocol, server->schedule);
2888 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2889 silc_protocol_execute_final(sock->protocol, server->schedule);
2890 sock->protocol = NULL;
2895 silc_schedule_task_add(server->schedule, 0,
2896 silc_server_close_connection_final,
2897 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2898 SILC_TASK_PRI_NORMAL);
2901 /* Sends disconnect message to remote connection and disconnects the
2904 void silc_server_disconnect_remote(SilcServer server,
2905 SilcSocketConnection sock,
2906 SilcStatus status, ...)
2909 unsigned char buf[512];
2917 memset(buf, 0, sizeof(buf));
2918 va_start(ap, status);
2919 cp = va_arg(ap, char *);
2921 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2926 SILC_LOG_DEBUG(("Disconnecting remote host"));
2928 /* Notify remote end that the conversation is over. The notify message
2929 is tried to be sent immediately. */
2933 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2935 buffer = silc_buffer_alloc_size(len);
2939 buffer->data[0] = status;
2941 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2943 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2944 buffer->data, buffer->len, TRUE);
2945 silc_buffer_free(buffer);
2948 silc_server_packet_queue_purge(server, sock);
2950 /* Mark the connection to be disconnected */
2951 SILC_SET_DISCONNECTED(sock);
2952 silc_server_close_connection(server, sock);
2957 SilcClientEntry client;
2958 } *FreeClientInternal;
2960 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2962 FreeClientInternal i = (FreeClientInternal)context;
2964 assert(!silc_hash_table_count(i->client->channels));
2966 silc_idlist_del_data(i->client);
2967 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2971 /* Frees client data and notifies about client's signoff. */
2973 void silc_server_free_client_data(SilcServer server,
2974 SilcSocketConnection sock,
2975 SilcClientEntry client,
2977 const char *signoff)
2979 SILC_LOG_DEBUG(("Freeing client data"));
2982 if (!client->router && !client->connection &&
2983 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2984 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2985 SILC_LOG_ERROR(("****** Contact Pekka"));
2986 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2991 /* If there is pending outgoing data for the client then purge it
2992 to the network before removing the client entry. */
2993 silc_server_packet_queue_purge(server, sock);
2996 /* Check if anyone is watching this nickname */
2997 if (server->server_type == SILC_ROUTER)
2998 silc_server_check_watcher_list(server, client, NULL,
2999 SILC_NOTIFY_TYPE_SIGNOFF);
3001 /* Send SIGNOFF notify to routers. */
3003 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3004 SILC_BROADCAST(server), client->id,
3008 /* Remove client from all channels */
3010 silc_server_remove_from_channels(server, NULL, client,
3011 TRUE, (char *)signoff, TRUE);
3013 silc_server_remove_from_channels(server, NULL, client,
3014 FALSE, NULL, FALSE);
3016 /* Remove this client from watcher list if it is */
3017 silc_server_del_from_watcher_list(server, client);
3019 /* Update statistics */
3020 server->stat.my_clients--;
3021 server->stat.clients--;
3022 if (server->stat.cell_clients)
3023 server->stat.cell_clients--;
3024 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3025 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3026 silc_schedule_task_del_by_context(server->schedule, client);
3028 /* We will not delete the client entry right away. We will take it
3029 into history (for WHOWAS command) for 5 minutes, unless we're
3030 shutting down server. */
3031 if (!server->server_shutdown) {
3032 FreeClientInternal i = silc_calloc(1, sizeof(*i));
3035 silc_schedule_task_add(server->schedule, 0,
3036 silc_server_free_client_data_timeout,
3038 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3039 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3040 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3042 client->router = NULL;
3043 client->connection = NULL;
3045 /* Delete directly since we're shutting down server */
3046 silc_idlist_del_data(client);
3047 silc_idlist_del_client(server->local_list, client);
3051 /* Frees user_data pointer from socket connection object. This also sends
3052 appropriate notify packets to the network to inform about leaving
3055 void silc_server_free_sock_user_data(SilcServer server,
3056 SilcSocketConnection sock,
3057 const char *signoff_message)
3059 switch (sock->type) {
3060 case SILC_SOCKET_TYPE_CLIENT:
3062 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3063 silc_server_free_client_data(server, sock, user_data, TRUE,
3067 case SILC_SOCKET_TYPE_SERVER:
3068 case SILC_SOCKET_TYPE_ROUTER:
3070 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3071 SilcServerEntry backup_router = NULL;
3073 SILC_LOG_DEBUG(("Freeing server data"));
3076 backup_router = silc_server_backup_get(server, user_data->id);
3078 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3079 backup_router == server->id_entry &&
3080 sock->type != SILC_SOCKET_TYPE_ROUTER)
3081 backup_router = NULL;
3083 if (server->server_shutdown)
3084 backup_router = NULL;
3086 /* If this was our primary router connection then we're lost to
3087 the outside world. */
3088 if (server->router == user_data) {
3089 /* Check whether we have a backup router connection */
3090 if (!backup_router || backup_router == user_data) {
3091 silc_schedule_task_add(server->schedule, 0,
3092 silc_server_connect_to_router,
3095 SILC_TASK_PRI_NORMAL);
3097 server->id_entry->router = NULL;
3098 server->router = NULL;
3099 server->standalone = TRUE;
3100 backup_router = NULL;
3102 if (server->id_entry != backup_router) {
3103 SILC_LOG_INFO(("New primary router is backup router %s",
3104 backup_router->server_name));
3105 server->id_entry->router = backup_router;
3106 server->router = backup_router;
3107 server->router_connect = time(0);
3108 server->backup_primary = TRUE;
3110 SILC_LOG_INFO(("We are now new primary router in this cell"));
3111 server->id_entry->router = NULL;
3112 server->router = NULL;
3113 server->standalone = TRUE;
3115 /* We stop here to take a breath */
3119 if (server->server_type == SILC_BACKUP_ROUTER) {
3120 server->server_type = SILC_ROUTER;
3122 /* We'll need to constantly try to reconnect to the primary
3123 router so that we'll see when it comes back online. */
3124 silc_server_backup_reconnect(server, sock->ip, sock->port,
3125 silc_server_backup_connected,
3129 /* Mark this connection as replaced */
3130 silc_server_backup_replaced_add(server, user_data->id,
3133 } else if (backup_router) {
3134 SILC_LOG_INFO(("Enabling the use of backup router %s",
3135 backup_router->server_name));
3136 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3137 backup_router->server_name));
3139 /* Mark this connection as replaced */
3140 silc_server_backup_replaced_add(server, user_data->id,
3144 if (!backup_router) {
3145 /* Remove all servers that are originated from this server, and
3146 remove the clients of those servers too. */
3147 silc_server_remove_servers_by_server(server, user_data, TRUE);
3149 /* Remove the clients that this server owns as they will become
3151 silc_server_remove_clients_by_server(server, user_data,
3154 /* Remove channels owned by this server */
3155 if (server->server_type == SILC_SERVER)
3156 silc_server_remove_channels_by_server(server, user_data);
3158 /* Enable local server connections that may be disabled */
3159 silc_server_local_servers_toggle_enabled(server, TRUE);
3161 /* Update the client entries of this server to the new backup
3162 router. If we are the backup router we also resolve the real
3163 servers for the clients. After updating is over this also
3164 removes the clients that this server explicitly owns. */
3165 silc_server_update_clients_by_server(server, user_data,
3166 backup_router, TRUE);
3168 /* If we are router and just lost our primary router (now standlaone)
3169 we remove everything that was behind it, since we don't know
3171 if (server->server_type == SILC_ROUTER && server->standalone)
3172 /* Remove all servers that are originated from this server, and
3173 remove the clients of those servers too. */
3174 silc_server_remove_servers_by_server(server, user_data, TRUE);
3176 /* Finally remove the clients that are explicitly owned by this
3177 server. They go down with the server. */
3178 silc_server_remove_clients_by_server(server, user_data,
3181 /* Update our server cache to use the new backup router too. */
3182 silc_server_update_servers_by_server(server, user_data, backup_router);
3183 if (server->server_type == SILC_SERVER)
3184 silc_server_update_channels_by_server(server, user_data,
3187 /* Send notify about primary router going down to local operators */
3188 if (server->backup_router)
3189 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3190 SILC_NOTIFY_TYPE_NONE,
3191 ("%s switched to backup router %s "
3192 "(we are primary router now)",
3193 server->server_name, server->server_name));
3194 else if (server->router)
3195 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3196 SILC_NOTIFY_TYPE_NONE,
3197 ("%s switched to backup router %s",
3198 server->server_name,
3199 server->router->server_name));
3202 /* Free the server entry */
3203 silc_server_backup_del(server, user_data);
3204 silc_server_backup_replaced_del(server, user_data);
3205 silc_idlist_del_data(user_data);
3206 if (!silc_idlist_del_server(server->local_list, user_data))
3207 silc_idlist_del_server(server->global_list, user_data);
3208 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3209 server->stat.my_servers--;
3211 server->stat.my_routers--;
3212 server->stat.routers--;
3214 server->stat.servers--;
3215 if (server->server_type == SILC_ROUTER)
3216 server->stat.cell_servers--;
3218 if (backup_router && backup_router != server->id_entry) {
3219 /* Announce all of our stuff that was created about 5 minutes ago.
3220 The backup router knows all the other stuff already. */
3221 if (server->server_type == SILC_ROUTER)
3222 silc_server_announce_servers(server, FALSE, time(0) - 300,
3223 backup_router->connection);
3225 /* Announce our clients and channels to the router */
3226 silc_server_announce_clients(server, time(0) - 300,
3227 backup_router->connection);
3228 silc_server_announce_channels(server, time(0) - 300,
3229 backup_router->connection);
3235 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3237 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3239 silc_idlist_del_data(user_data);
3240 silc_free(user_data);
3245 /* If any protocol is active cancel its execution */
3246 if (sock->protocol) {
3247 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3248 silc_protocol_cancel(sock->protocol, server->schedule);
3249 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3250 silc_protocol_execute_final(sock->protocol, server->schedule);
3251 sock->protocol = NULL;
3254 sock->user_data = NULL;
3257 /* Removes client from all channels it has joined. This is used when client
3258 connection is disconnected. If the client on a channel is last, the
3259 channel is removed as well. This sends the SIGNOFF notify types. */
3261 void silc_server_remove_from_channels(SilcServer server,
3262 SilcSocketConnection sock,
3263 SilcClientEntry client,
3265 const char *signoff_message,
3268 SilcChannelEntry channel;
3269 SilcChannelClientEntry chl;
3270 SilcHashTableList htl;
3271 SilcBuffer clidp = NULL;
3276 SILC_LOG_DEBUG(("Removing client from joined channels"));
3278 if (notify && !client->id)
3282 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3287 /* Remove the client from all channels. The client is removed from
3288 the channels' user list. */
3289 silc_hash_table_list(client->channels, &htl);
3290 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3291 channel = chl->channel;
3293 /* Remove channel if this is last client leaving the channel, unless
3294 the channel is permanent. */
3295 if (server->server_type != SILC_SERVER &&
3296 silc_hash_table_count(channel->user_list) < 2) {
3297 silc_server_channel_delete(server, channel);
3301 silc_hash_table_del(client->channels, channel);
3302 silc_hash_table_del(channel->user_list, chl->client);
3303 channel->user_count--;
3305 /* If there is no global users on the channel anymore mark the channel
3306 as local channel. Do not check if the removed client is local client. */
3307 if (server->server_type == SILC_SERVER && channel->global_users &&
3308 chl->client->router && !silc_server_channel_has_global(channel))
3309 channel->global_users = FALSE;
3313 /* Update statistics */
3314 if (SILC_IS_LOCAL(client))
3315 server->stat.my_chanclients--;
3316 if (server->server_type == SILC_ROUTER) {
3317 server->stat.cell_chanclients--;
3318 server->stat.chanclients--;
3321 /* If there is not at least one local user on the channel then we don't
3322 need the channel entry anymore, we can remove it safely, unless the
3323 channel is permanent channel */
3324 if (server->server_type == SILC_SERVER &&
3325 !silc_server_channel_has_local(channel)) {
3326 /* Notify about leaving client if this channel has global users. */
3327 if (notify && channel->global_users)
3328 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3329 SILC_NOTIFY_TYPE_SIGNOFF,
3330 signoff_message ? 2 : 1,
3331 clidp->data, clidp->len,
3332 signoff_message, signoff_message ?
3333 strlen(signoff_message) : 0);
3335 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3336 silc_server_channel_delete(server, channel);
3340 /* Send notify to channel about client leaving SILC and channel too */
3342 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3343 SILC_NOTIFY_TYPE_SIGNOFF,
3344 signoff_message ? 2 : 1,
3345 clidp->data, clidp->len,
3346 signoff_message, signoff_message ?
3347 strlen(signoff_message) : 0);
3349 /* Don't create keys if we are shutting down */
3350 if (server->server_shutdown)
3353 /* Re-generate channel key if needed */
3354 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3355 if (!silc_server_create_channel_key(server, channel, 0))
3358 /* Send the channel key to the channel. The key of course is not sent
3359 to the client who was removed from the channel. */
3360 silc_server_send_channel_key(server, client->connection, channel,
3361 server->server_type == SILC_ROUTER ?
3362 FALSE : !server->standalone);
3366 silc_hash_table_list_reset(&htl);
3368 silc_buffer_free(clidp);
3371 /* Removes client from one channel. This is used for example when client
3372 calls LEAVE command to remove itself from the channel. Returns TRUE
3373 if channel still exists and FALSE if the channel is removed when
3374 last client leaves the channel. If `notify' is FALSE notify messages
3377 bool silc_server_remove_from_one_channel(SilcServer server,
3378 SilcSocketConnection sock,
3379 SilcChannelEntry channel,
3380 SilcClientEntry client,
3383 SilcChannelClientEntry chl;
3386 SILC_LOG_DEBUG(("Removing %s from channel %s",
3387 silc_id_render(client->id, SILC_ID_CLIENT),
3388 channel->channel_name));
3390 /* Get the entry to the channel, if this client is not on the channel
3392 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3395 /* Remove channel if this is last client leaving the channel, unless
3396 the channel is permanent. */
3397 if (server->server_type != SILC_SERVER &&
3398 silc_hash_table_count(channel->user_list) < 2) {
3399 silc_server_channel_delete(server, channel);
3403 silc_hash_table_del(client->channels, chl->channel);
3404 silc_hash_table_del(channel->user_list, chl->client);
3405 channel->user_count--;
3407 /* If there is no global users on the channel anymore mark the channel
3408 as local channel. Do not check if the client is local client. */
3409 if (server->server_type == SILC_SERVER && channel->global_users &&
3410 chl->client->router && !silc_server_channel_has_global(channel))
3411 channel->global_users = FALSE;
3415 /* Update statistics */
3416 if (SILC_IS_LOCAL(client))
3417 server->stat.my_chanclients--;
3418 if (server->server_type == SILC_ROUTER) {
3419 server->stat.cell_chanclients--;
3420 server->stat.chanclients--;
3423 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3427 /* If there is not at least one local user on the channel then we don't
3428 need the channel entry anymore, we can remove it safely, unless the
3429 channel is permanent channel */
3430 if (server->server_type == SILC_SERVER &&
3431 !silc_server_channel_has_local(channel)) {
3432 /* Notify about leaving client if this channel has global users. */
3433 if (notify && channel->global_users)
3434 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3435 SILC_NOTIFY_TYPE_LEAVE, 1,
3436 clidp->data, clidp->len);
3438 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3439 silc_server_channel_delete(server, channel);
3440 silc_buffer_free(clidp);
3444 /* Send notify to channel about client leaving the channel */
3446 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3447 SILC_NOTIFY_TYPE_LEAVE, 1,
3448 clidp->data, clidp->len);
3450 silc_buffer_free(clidp);
3454 /* Timeout callback. This is called if connection is idle or for some
3455 other reason is not responding within some period of time. This
3456 disconnects the remote end. */
3458 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3460 SilcServer server = (SilcServer)context;
3461 SilcSocketConnection sock = server->sockets[fd];
3462 SilcProtocolType protocol = 0;
3464 SILC_LOG_DEBUG(("Start"));
3469 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3470 sock->hostname, sock->ip));
3472 /* If we have protocol active we must assure that we call the protocol's
3473 final callback so that all the memory is freed. */
3474 if (sock->protocol) {
3475 protocol = sock->protocol->protocol->type;
3476 silc_protocol_cancel(sock->protocol, server->schedule);
3477 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3478 silc_protocol_execute_final(sock->protocol, server->schedule);
3479 sock->protocol = NULL;
3483 if (sock->user_data)
3484 silc_server_free_sock_user_data(server, sock, NULL);
3486 silc_server_disconnect_remote(server, sock,
3488 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3489 SILC_STATUS_ERR_AUTH_FAILED :
3490 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3491 "Connection timeout");
3494 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3495 function may be used only by router. In real SILC network all channels
3496 are created by routers thus this function is never used by normal
3499 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3500 SilcServerID *router_id,
3506 SilcChannelID *channel_id;
3507 SilcChannelEntry entry;
3511 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3514 cipher = SILC_DEFAULT_CIPHER;
3516 hmac = SILC_DEFAULT_HMAC;
3518 /* Allocate cipher */
3519 if (!silc_cipher_alloc(cipher, &key))
3523 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3524 silc_cipher_free(key);
3528 channel_name = strdup(channel_name);
3530 /* Create the channel ID */
3531 if (!silc_id_create_channel_id(server, router_id, server->rng,
3533 silc_free(channel_name);
3534 silc_cipher_free(key);
3535 silc_hmac_free(newhmac);
3539 /* Create the channel */
3540 entry = silc_idlist_add_channel(server->local_list, channel_name,
3541 SILC_CHANNEL_MODE_NONE, channel_id,
3542 NULL, key, newhmac, 0);
3544 silc_free(channel_name);
3545 silc_cipher_free(key);
3546 silc_hmac_free(newhmac);
3547 silc_free(channel_id);
3551 entry->cipher = strdup(cipher);
3552 entry->hmac_name = strdup(hmac);
3554 /* Now create the actual key material */
3555 if (!silc_server_create_channel_key(server, entry,
3556 silc_cipher_get_key_len(key) / 8)) {
3557 silc_idlist_del_channel(server->local_list, entry);
3561 /* Notify other routers about the new channel. We send the packet
3562 to our primary route. */
3564 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3565 channel_name, entry->id,
3566 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3569 /* Distribute to backup routers */
3570 if (broadcast && server->server_type == SILC_ROUTER) {
3573 SilcUInt32 name_len = strlen(channel_name);
3574 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3575 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3577 packet = silc_channel_payload_encode(channel_name, name_len,
3578 cid, channel_id_len, entry->mode);
3579 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3580 packet->data, packet->len, FALSE, TRUE);
3582 silc_buffer_free(packet);
3585 server->stat.my_channels++;
3586 if (server->server_type == SILC_ROUTER) {
3587 server->stat.channels++;
3588 server->stat.cell_channels++;
3589 entry->users_resolved = TRUE;
3595 /* Same as above but creates the channel with Channel ID `channel_id. */
3598 silc_server_create_new_channel_with_id(SilcServer server,
3602 SilcChannelID *channel_id,
3605 SilcChannelEntry entry;
3609 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3612 cipher = SILC_DEFAULT_CIPHER;
3614 hmac = SILC_DEFAULT_HMAC;
3616 /* Allocate cipher */
3617 if (!silc_cipher_alloc(cipher, &key))
3621 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3622 silc_cipher_free(key);
3626 channel_name = strdup(channel_name);
3628 /* Create the channel */
3629 entry = silc_idlist_add_channel(server->local_list, channel_name,
3630 SILC_CHANNEL_MODE_NONE, channel_id,
3631 NULL, key, newhmac, 0);
3633 silc_cipher_free(key);
3634 silc_hmac_free(newhmac);
3635 silc_free(channel_name);
3639 /* Now create the actual key material */
3640 if (!silc_server_create_channel_key(server, entry,
3641 silc_cipher_get_key_len(key) / 8)) {
3642 silc_idlist_del_channel(server->local_list, entry);
3646 /* Notify other routers about the new channel. We send the packet
3647 to our primary route. */
3649 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3650 channel_name, entry->id,
3651 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3654 /* Distribute to backup routers */
3655 if (broadcast && server->server_type == SILC_ROUTER) {
3658 SilcUInt32 name_len = strlen(channel_name);
3659 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3660 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3662 packet = silc_channel_payload_encode(channel_name, name_len,
3663 cid, channel_id_len, entry->mode);
3664 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3665 packet->data, packet->len, FALSE, TRUE);
3667 silc_buffer_free(packet);
3670 server->stat.my_channels++;
3671 if (server->server_type == SILC_ROUTER) {
3672 server->stat.channels++;
3673 server->stat.cell_channels++;
3674 entry->users_resolved = TRUE;
3680 /* Channel's key re-key timeout callback. */
3682 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3684 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3685 SilcServer server = (SilcServer)rekey->context;
3689 /* Return now if we are shutting down */
3690 if (server->server_shutdown)
3693 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3696 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3699 /* Generates new channel key. This is used to create the initial channel key
3700 but also to re-generate new key for channel. If `key_len' is provided
3701 it is the bytes of the key length. */
3703 bool silc_server_create_channel_key(SilcServer server,
3704 SilcChannelEntry channel,
3708 unsigned char channel_key[32], hash[32];
3711 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3712 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3716 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3718 if (!channel->channel_key)
3719 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3720 channel->channel_key = NULL;
3726 else if (channel->key_len)
3727 len = channel->key_len / 8;
3729 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3731 /* Create channel key */
3732 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3735 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3737 /* Remove old key if exists */
3739 memset(channel->key, 0, channel->key_len / 8);
3740 silc_free(channel->key);
3744 channel->key_len = len * 8;
3745 channel->key = silc_memdup(channel_key, len);
3746 memset(channel_key, 0, sizeof(channel_key));
3748 /* Generate HMAC key from the channel key data and set it */
3750 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3751 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3752 silc_hmac_set_key(channel->hmac, hash,
3753 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3754 memset(hash, 0, sizeof(hash));
3756 if (server->server_type == SILC_ROUTER) {
3757 if (!channel->rekey)
3758 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3759 channel->rekey->context = (void *)server;
3760 channel->rekey->channel = channel;
3761 channel->rekey->key_len = key_len;
3762 if (channel->rekey->task)
3763 silc_schedule_task_del(server->schedule, channel->rekey->task);
3765 channel->rekey->task =
3766 silc_schedule_task_add(server->schedule, 0,
3767 silc_server_channel_key_rekey,
3768 (void *)channel->rekey,
3769 server->config->channel_rekey_secs, 0,
3771 SILC_TASK_PRI_NORMAL);
3777 /* Saves the channel key found in the encoded `key_payload' buffer. This
3778 function is used when we receive Channel Key Payload and also when we're
3779 processing JOIN command reply. Returns entry to the channel. */
3781 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3782 SilcBuffer key_payload,
3783 SilcChannelEntry channel)
3785 SilcChannelKeyPayload payload = NULL;
3786 SilcChannelID *id = NULL;
3787 unsigned char *tmp, hash[32];
3791 /* Decode channel key payload */
3792 payload = silc_channel_key_payload_parse(key_payload->data,
3795 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3800 /* Get the channel entry */
3803 /* Get channel ID */
3804 tmp = silc_channel_key_get_id(payload, &tmp_len);
3805 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3811 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3813 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3815 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3816 silc_id_render(id, SILC_ID_CHANNEL)));
3822 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3824 tmp = silc_channel_key_get_key(payload, &tmp_len);
3830 cipher = silc_channel_key_get_cipher(payload, NULL);
3836 /* Remove old key if exists */
3838 memset(channel->key, 0, channel->key_len / 8);
3839 silc_free(channel->key);
3840 silc_cipher_free(channel->channel_key);
3843 /* Create new cipher */
3844 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3845 channel->channel_key = NULL;
3850 if (channel->cipher)
3851 silc_free(channel->cipher);
3852 channel->cipher = strdup(cipher);
3855 channel->key_len = tmp_len * 8;
3856 channel->key = silc_memdup(tmp, tmp_len);
3857 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3859 /* Generate HMAC key from the channel key data and set it */
3861 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3862 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3863 silc_hmac_set_key(channel->hmac, hash,
3864 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3866 memset(hash, 0, sizeof(hash));
3867 memset(tmp, 0, tmp_len);
3869 if (server->server_type == SILC_ROUTER) {
3870 if (!channel->rekey)
3871 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3872 channel->rekey->context = (void *)server;
3873 channel->rekey->channel = channel;
3874 if (channel->rekey->task)
3875 silc_schedule_task_del(server->schedule, channel->rekey->task);
3877 channel->rekey->task =
3878 silc_schedule_task_add(server->schedule, 0,
3879 silc_server_channel_key_rekey,
3880 (void *)channel->rekey,
3881 server->config->channel_rekey_secs, 0,
3883 SILC_TASK_PRI_NORMAL);
3889 silc_channel_key_payload_free(payload);
3894 /* Heartbeat callback. This function is set as argument for the
3895 silc_socket_set_heartbeat function. The library will call this function
3896 at the set time interval. */
3898 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3901 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3903 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3904 sock->port, sock->ip));
3906 /* Send the heartbeat */
3907 silc_server_send_heartbeat(hb->server, sock);
3910 /* Returns assembled of all servers in the given ID list. The packet's
3911 form is dictated by the New ID payload. */
3913 static void silc_server_announce_get_servers(SilcServer server,
3914 SilcServerEntry remote,
3916 SilcBuffer *servers,
3917 unsigned long creation_time)
3919 SilcIDCacheList list;
3920 SilcIDCacheEntry id_cache;
3921 SilcServerEntry entry;
3924 /* Go through all clients in the list */
3925 if (silc_idcache_get_all(id_list->servers, &list)) {
3926 if (silc_idcache_list_first(list, &id_cache)) {
3928 entry = (SilcServerEntry)id_cache->context;
3930 /* Do not announce the one we've sending our announcements and
3931 do not announce ourself. Also check the creation time if it's
3933 if ((entry == remote) || (entry == server->id_entry) ||
3934 (creation_time && entry->data.created < creation_time)) {
3935 if (!silc_idcache_list_next(list, &id_cache))
3940 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3942 *servers = silc_buffer_realloc(*servers,
3944 (*servers)->truelen + idp->len :
3946 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3947 silc_buffer_put(*servers, idp->data, idp->len);
3948 silc_buffer_pull(*servers, idp->len);
3949 silc_buffer_free(idp);
3951 if (!silc_idcache_list_next(list, &id_cache))
3956 silc_idcache_list_free(list);
3961 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3967 p = silc_notify_payload_encode(notify, argc, ap);
3973 /* This function is used by router to announce existing servers to our
3974 primary router when we've connected to it. If `creation_time' is non-zero
3975 then only the servers that has been created after the `creation_time'
3976 will be announced. */
3978 void silc_server_announce_servers(SilcServer server, bool global,
3979 unsigned long creation_time,
3980 SilcSocketConnection remote)
3982 SilcBuffer servers = NULL;
3984 SILC_LOG_DEBUG(("Announcing servers"));
3986 /* Get servers in local list */
3987 silc_server_announce_get_servers(server, remote->user_data,
3988 server->local_list, &servers,
3992 /* Get servers in global list */
3993 silc_server_announce_get_servers(server, remote->user_data,
3994 server->global_list, &servers,
3998 silc_buffer_push(servers, servers->data - servers->head);
3999 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4001 /* Send the packet */
4002 silc_server_packet_send(server, remote,
4003 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4004 servers->data, servers->len, TRUE);
4006 silc_buffer_free(servers);
4010 /* Returns assembled packet of all clients in the given ID list. The
4011 packet's form is dictated by the New ID Payload. */
4013 static void silc_server_announce_get_clients(SilcServer server,
4015 SilcBuffer *clients,
4017 unsigned long creation_time)
4019 SilcIDCacheList list;
4020 SilcIDCacheEntry id_cache;
4021 SilcClientEntry client;
4024 unsigned char mode[4];
4026 /* Go through all clients in the list */
4027 if (silc_idcache_get_all(id_list->clients, &list)) {
4028 if (silc_idcache_list_first(list, &id_cache)) {
4030 client = (SilcClientEntry)id_cache->context;
4032 if (creation_time && client->data.created < creation_time) {
4033 if (!silc_idcache_list_next(list, &id_cache))
4037 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4038 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4039 if (!silc_idcache_list_next(list, &id_cache))
4044 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4046 *clients = silc_buffer_realloc(*clients,
4048 (*clients)->truelen + idp->len :
4050 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4051 silc_buffer_put(*clients, idp->data, idp->len);
4052 silc_buffer_pull(*clients, idp->len);
4054 SILC_PUT32_MSB(client->mode, mode);
4056 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4057 2, idp->data, idp->len,
4059 *umodes = silc_buffer_realloc(*umodes,
4061 (*umodes)->truelen + tmp->len :
4063 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4064 silc_buffer_put(*umodes, tmp->data, tmp->len);
4065 silc_buffer_pull(*umodes, tmp->len);
4066 silc_buffer_free(tmp);
4068 silc_buffer_free(idp);
4070 if (!silc_idcache_list_next(list, &id_cache))
4075 silc_idcache_list_free(list);
4079 /* This function is used to announce our existing clients to our router
4080 when we've connected to it. If `creation_time' is non-zero then only
4081 the clients that has been created after the `creation_time' will be
4084 void silc_server_announce_clients(SilcServer server,
4085 unsigned long creation_time,
4086 SilcSocketConnection remote)
4088 SilcBuffer clients = NULL;
4089 SilcBuffer umodes = NULL;
4091 SILC_LOG_DEBUG(("Announcing clients"));
4093 /* Get clients in local list */
4094 silc_server_announce_get_clients(server, server->local_list,
4095 &clients, &umodes, creation_time);
4097 /* As router we announce our global list as well */
4098 if (server->server_type == SILC_ROUTER)
4099 silc_server_announce_get_clients(server, server->global_list,
4100 &clients, &umodes, creation_time);
4103 silc_buffer_push(clients, clients->data - clients->head);
4104 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4106 /* Send the packet */
4107 silc_server_packet_send(server, remote,
4108 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4109 clients->data, clients->len, TRUE);
4111 silc_buffer_free(clients);
4115 silc_buffer_push(umodes, umodes->data - umodes->head);
4116 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4118 /* Send the packet */
4119 silc_server_packet_send(server, remote,
4120 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4121 umodes->data, umodes->len, TRUE);
4123 silc_buffer_free(umodes);
4127 /* Returns channel's topic for announcing it */
4129 void silc_server_announce_get_channel_topic(SilcServer server,
4130 SilcChannelEntry channel,
4135 if (channel->topic) {
4136 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4137 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4138 chidp->data, chidp->len,
4140 strlen(channel->topic));
4141 silc_buffer_free(chidp);
4145 /* Returns assembled packets for channel users of the `channel'. */
4147 void silc_server_announce_get_channel_users(SilcServer server,
4148 SilcChannelEntry channel,
4149 SilcBuffer *channel_modes,
4150 SilcBuffer *channel_users,
4151 SilcBuffer *channel_users_modes)
4153 SilcChannelClientEntry chl;
4154 SilcHashTableList htl;
4155 SilcBuffer chidp, clidp, csidp;
4158 unsigned char mode[4], *fkey = NULL;
4159 SilcUInt32 fkey_len = 0;
4162 SILC_LOG_DEBUG(("Start"));
4164 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4165 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4168 SILC_PUT32_MSB(channel->mode, mode);
4169 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4170 if (channel->founder_key)
4171 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4173 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4174 6, csidp->data, csidp->len,
4177 hmac, hmac ? strlen(hmac) : 0,
4178 channel->passphrase,
4179 channel->passphrase ?
4180 strlen(channel->passphrase) : 0,
4184 silc_buffer_realloc(*channel_modes,
4186 (*channel_modes)->truelen + len : len));
4187 silc_buffer_pull_tail(*channel_modes,
4188 ((*channel_modes)->end -
4189 (*channel_modes)->data));
4190 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4191 silc_buffer_pull(*channel_modes, len);
4192 silc_buffer_free(tmp);
4197 /* Now find all users on the channel */
4198 silc_hash_table_list(channel->user_list, &htl);
4199 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4200 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4203 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4204 clidp->data, clidp->len,
4205 chidp->data, chidp->len);
4208 silc_buffer_realloc(*channel_users,
4210 (*channel_users)->truelen + len : len));
4211 silc_buffer_pull_tail(*channel_users,
4212 ((*channel_users)->end -
4213 (*channel_users)->data));
4215 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4216 silc_buffer_pull(*channel_users, len);
4217 silc_buffer_free(tmp);
4219 /* CUMODE notify for mode change on the channel */
4220 SILC_PUT32_MSB(chl->mode, mode);
4221 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4222 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4223 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4224 4, csidp->data, csidp->len,
4226 clidp->data, clidp->len,
4229 *channel_users_modes =
4230 silc_buffer_realloc(*channel_users_modes,
4231 (*channel_users_modes ?
4232 (*channel_users_modes)->truelen + len : len));
4233 silc_buffer_pull_tail(*channel_users_modes,
4234 ((*channel_users_modes)->end -
4235 (*channel_users_modes)->data));
4237 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4238 silc_buffer_pull(*channel_users_modes, len);
4239 silc_buffer_free(tmp);
4243 silc_buffer_free(clidp);
4245 silc_hash_table_list_reset(&htl);
4246 silc_buffer_free(chidp);
4247 silc_buffer_free(csidp);
4250 /* Returns assembled packets for all channels and users on those channels
4251 from the given ID List. The packets are in the form dictated by the
4252 New Channel and New Channel User payloads. */
4254 void silc_server_announce_get_channels(SilcServer server,
4256 SilcBuffer *channels,
4257 SilcBuffer **channel_modes,
4258 SilcBuffer *channel_users,
4259 SilcBuffer **channel_users_modes,
4260 SilcUInt32 *channel_users_modes_c,
4261 SilcBuffer **channel_topics,
4262 SilcChannelID ***channel_ids,
4263 unsigned long creation_time)
4265 SilcIDCacheList list;
4266 SilcIDCacheEntry id_cache;
4267 SilcChannelEntry channel;
4270 SilcUInt16 name_len;
4272 int i = *channel_users_modes_c;
4275 SILC_LOG_DEBUG(("Start"));
4277 /* Go through all channels in the list */
4278 if (silc_idcache_get_all(id_list->channels, &list)) {
4279 if (silc_idcache_list_first(list, &id_cache)) {
4281 channel = (SilcChannelEntry)id_cache->context;
4283 if (creation_time && channel->created < creation_time)
4288 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4289 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4290 name_len = strlen(channel->channel_name);
4293 len = 4 + name_len + id_len + 4;
4295 silc_buffer_realloc(*channels,
4296 (*channels ? (*channels)->truelen +
4298 silc_buffer_pull_tail(*channels,
4299 ((*channels)->end - (*channels)->data));
4300 silc_buffer_format(*channels,
4301 SILC_STR_UI_SHORT(name_len),
4302 SILC_STR_UI_XNSTRING(channel->channel_name,
4304 SILC_STR_UI_SHORT(id_len),
4305 SILC_STR_UI_XNSTRING(cid, id_len),
4306 SILC_STR_UI_INT(channel->mode),
4308 silc_buffer_pull(*channels, len);
4311 if (creation_time && channel->updated < creation_time)
4317 /* Channel user modes */
4318 *channel_users_modes = silc_realloc(*channel_users_modes,
4319 sizeof(**channel_users_modes) *
4321 (*channel_users_modes)[i] = NULL;
4322 *channel_modes = silc_realloc(*channel_modes,
4323 sizeof(**channel_modes) * (i + 1));
4324 (*channel_modes)[i] = NULL;
4325 *channel_ids = silc_realloc(*channel_ids,
4326 sizeof(**channel_ids) * (i + 1));
4327 (*channel_ids)[i] = NULL;
4328 silc_server_announce_get_channel_users(server, channel,
4329 &(*channel_modes)[i],
4331 &(*channel_users_modes)[i]);
4332 (*channel_ids)[i] = channel->id;
4334 /* Channel's topic */
4335 *channel_topics = silc_realloc(*channel_topics,
4336 sizeof(**channel_topics) * (i + 1));
4337 (*channel_topics)[i] = NULL;
4338 silc_server_announce_get_channel_topic(server, channel,
4339 &(*channel_topics)[i]);
4340 (*channel_users_modes_c)++;
4344 if (!silc_idcache_list_next(list, &id_cache))
4349 silc_idcache_list_free(list);
4353 /* This function is used to announce our existing channels to our router
4354 when we've connected to it. This also announces the users on the
4355 channels to the router. If the `creation_time' is non-zero only the
4356 channels that was created after the `creation_time' are announced.
4357 Note that the channel users are still announced even if the `creation_time'
4360 void silc_server_announce_channels(SilcServer server,
4361 unsigned long creation_time,
4362 SilcSocketConnection remote)
4364 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4365 SilcBuffer *channel_users_modes = NULL;
4366 SilcBuffer *channel_topics = NULL;
4367 SilcUInt32 channel_users_modes_c = 0;
4368 SilcChannelID **channel_ids = NULL;
4370 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4372 /* Get channels and channel users in local list */
4373 silc_server_announce_get_channels(server, server->local_list,
4374 &channels, &channel_modes,
4376 &channel_users_modes,
4377 &channel_users_modes_c,
4379 &channel_ids, creation_time);
4381 /* Get channels and channel users in global list */
4382 if (server->server_type != SILC_SERVER)
4383 silc_server_announce_get_channels(server, server->global_list,
4384 &channels, &channel_modes,
4386 &channel_users_modes,
4387 &channel_users_modes_c,
4389 &channel_ids, creation_time);
4392 silc_buffer_push(channels, channels->data - channels->head);
4393 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4395 /* Send the packet */
4396 silc_server_packet_send(server, remote,
4397 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4398 channels->data, channels->len,
4401 silc_buffer_free(channels);
4404 if (channel_users) {
4405 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4406 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4407 channel_users->len);
4409 /* Send the packet */
4410 silc_server_packet_send(server, remote,
4411 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4412 channel_users->data, channel_users->len,
4415 silc_buffer_free(channel_users);
4418 if (channel_modes) {
4421 for (i = 0; i < channel_users_modes_c; i++) {
4422 if (!channel_modes[i])
4424 silc_buffer_push(channel_modes[i],
4425 channel_modes[i]->data -
4426 channel_modes[i]->head);
4427 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4428 channel_modes[i]->len);
4429 silc_server_packet_send_dest(server, remote,
4430 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4431 channel_ids[i], SILC_ID_CHANNEL,
4432 channel_modes[i]->data,
4433 channel_modes[i]->len,
4435 silc_buffer_free(channel_modes[i]);
4437 silc_free(channel_modes);
4440 if (channel_users_modes) {
4443 for (i = 0; i < channel_users_modes_c; i++) {
4444 if (!channel_users_modes[i])
4446 silc_buffer_push(channel_users_modes[i],
4447 channel_users_modes[i]->data -
4448 channel_users_modes[i]->head);
4449 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4450 channel_users_modes[i]->len);
4451 silc_server_packet_send_dest(server, remote,
4452 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4453 channel_ids[i], SILC_ID_CHANNEL,
4454 channel_users_modes[i]->data,
4455 channel_users_modes[i]->len,
4457 silc_buffer_free(channel_users_modes[i]);
4459 silc_free(channel_users_modes);
4462 if (channel_topics) {
4465 for (i = 0; i < channel_users_modes_c; i++) {
4466 if (!channel_topics[i])
4469 silc_buffer_push(channel_topics[i],
4470 channel_topics[i]->data -
4471 channel_topics[i]->head);
4472 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4473 channel_topics[i]->len);
4474 silc_server_packet_send_dest(server, remote,
4475 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4476 channel_ids[i], SILC_ID_CHANNEL,
4477 channel_topics[i]->data,
4478 channel_topics[i]->len,
4480 silc_buffer_free(channel_topics[i]);
4482 silc_free(channel_topics);
4485 silc_free(channel_ids);
4488 /* Failure timeout callback. If this is called then we will immediately
4489 process the received failure. We always process the failure with timeout
4490 since we do not want to blindly trust to received failure packets.
4491 This won't be called (the timeout is cancelled) if the failure was
4492 bogus (it is bogus if remote does not close the connection after sending
4495 SILC_TASK_CALLBACK(silc_server_failure_callback)
4497 SilcServerFailureContext f = (SilcServerFailureContext)context;
4499 if (f->sock->protocol) {
4500 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4501 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4507 /* Assembles user list and users mode list from the `channel'. */
4509 bool silc_server_get_users_on_channel(SilcServer server,
4510 SilcChannelEntry channel,
4511 SilcBuffer *user_list,
4512 SilcBuffer *mode_list,
4513 SilcUInt32 *user_count)
4515 SilcChannelClientEntry chl;
4516 SilcHashTableList htl;
4517 SilcBuffer client_id_list;
4518 SilcBuffer client_mode_list;
4520 SilcUInt32 list_count = 0, len = 0;
4522 if (!silc_hash_table_count(channel->user_list))
4525 silc_hash_table_list(channel->user_list, &htl);
4526 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4527 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4528 silc_hash_table_list_reset(&htl);
4530 client_id_list = silc_buffer_alloc(len);
4532 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4533 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4534 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4536 silc_hash_table_list(channel->user_list, &htl);
4537 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4539 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4540 silc_buffer_put(client_id_list, idp->data, idp->len);
4541 silc_buffer_pull(client_id_list, idp->len);
4542 silc_buffer_free(idp);
4544 /* Client's mode on channel */
4545 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4546 silc_buffer_pull(client_mode_list, 4);
4550 silc_hash_table_list_reset(&htl);
4551 silc_buffer_push(client_id_list,
4552 client_id_list->data - client_id_list->head);
4553 silc_buffer_push(client_mode_list,
4554 client_mode_list->data - client_mode_list->head);
4556 *user_list = client_id_list;
4557 *mode_list = client_mode_list;
4558 *user_count = list_count;
4562 /* Saves users and their modes to the `channel'. */
4564 void silc_server_save_users_on_channel(SilcServer server,
4565 SilcSocketConnection sock,
4566 SilcChannelEntry channel,
4567 SilcClientID *noadd,
4568 SilcBuffer user_list,
4569 SilcBuffer mode_list,
4570 SilcUInt32 user_count)
4575 SilcClientID *client_id;
4576 SilcClientEntry client;
4577 SilcIDCacheEntry cache;
4578 SilcChannelClientEntry chl;
4580 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4581 channel->channel_name));
4583 for (i = 0; i < user_count; i++) {
4585 SILC_GET16_MSB(idp_len, user_list->data + 2);
4587 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4588 silc_buffer_pull(user_list, idp_len);
4593 SILC_GET32_MSB(mode, mode_list->data);
4594 silc_buffer_pull(mode_list, 4);
4596 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4597 silc_free(client_id);
4603 /* Check if we have this client cached already. */
4604 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4605 server->server_type, &cache);
4607 client = silc_idlist_find_client_by_id(server->global_list,
4608 client_id, server->server_type,
4611 /* If router did not find such Client ID in its lists then this must
4612 be bogus client or some router in the net is buggy. */
4613 if (server->server_type != SILC_SERVER) {
4614 silc_free(client_id);
4618 /* We don't have that client anywhere, add it. The client is added
4619 to global list since server didn't have it in the lists so it must be
4621 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4622 silc_id_dup(client_id, SILC_ID_CLIENT),
4623 sock->user_data, NULL, 0);
4625 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4626 silc_free(client_id);
4630 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4635 silc_free(client_id);
4637 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4638 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4639 "%s", channel->channel_name));
4643 if (!silc_server_client_on_channel(client, channel, &chl)) {
4644 /* Client was not on the channel, add it. */
4645 chl = silc_calloc(1, sizeof(*chl));
4646 chl->client = client;
4648 chl->channel = channel;
4649 silc_hash_table_add(channel->user_list, chl->client, chl);
4650 silc_hash_table_add(client->channels, chl->channel, chl);
4651 channel->user_count++;
4659 /* Saves channels and channels user modes to the `client'. Removes
4660 the client from those channels that are not sent in the list but
4663 void silc_server_save_user_channels(SilcServer server,
4664 SilcSocketConnection sock,
4665 SilcClientEntry client,
4666 SilcBuffer channels,
4667 SilcBuffer channels_user_modes)
4670 SilcUInt32 *chumodes;
4671 SilcChannelPayload entry;
4672 SilcChannelEntry channel;
4673 SilcChannelID *channel_id;
4674 SilcChannelClientEntry chl;
4675 SilcHashTable ht = NULL;
4676 SilcHashTableList htl;
4680 if (!channels || !channels_user_modes ||
4681 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4684 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4685 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4687 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4688 NULL, NULL, NULL, TRUE);
4689 silc_dlist_start(ch);
4690 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4691 /* Check if we have this channel, and add it if we don't have it.
4692 Also add the client on the channel unless it is there already. */
4693 channel_id = silc_channel_get_id_parse(entry);
4694 channel = silc_idlist_find_channel_by_id(server->local_list,
4697 channel = silc_idlist_find_channel_by_id(server->global_list,
4700 if (server->server_type != SILC_SERVER) {
4701 silc_free(channel_id);
4706 /* We don't have that channel anywhere, add it. */
4707 name = silc_channel_get_name(entry, NULL);
4708 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4709 channel_id, server->router,
4712 silc_free(channel_id);
4719 channel->mode = silc_channel_get_mode(entry);
4721 /* Add the client on the channel */
4722 if (!silc_server_client_on_channel(client, channel, &chl)) {
4723 chl = silc_calloc(1, sizeof(*chl));
4724 chl->client = client;
4725 chl->mode = chumodes[i++];
4726 chl->channel = channel;
4727 silc_hash_table_add(channel->user_list, chl->client, chl);
4728 silc_hash_table_add(client->channels, chl->channel, chl);
4729 channel->user_count++;
4732 chl->mode = chumodes[i++];
4735 silc_hash_table_add(ht, channel, channel);
4736 silc_free(channel_id);
4738 silc_channel_payload_list_free(ch);
4739 silc_free(chumodes);
4743 /* Go through the list again and remove client from channels that
4744 are no part of the list. */
4746 silc_hash_table_list(client->channels, &htl);
4747 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4748 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4749 silc_hash_table_del(chl->channel->user_list, chl->client);
4750 silc_hash_table_del(chl->client->channels, chl->channel);
4754 silc_hash_table_list_reset(&htl);
4755 silc_hash_table_free(ht);
4757 silc_hash_table_list(client->channels, &htl);
4758 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4759 silc_hash_table_del(chl->channel->user_list, chl->client);
4760 silc_hash_table_del(chl->client->channels, chl->channel);
4763 silc_hash_table_list_reset(&htl);
4767 /* Lookups route to the client indicated by the `id_data'. The connection
4768 object and internal data object is returned. Returns NULL if route
4769 could not be found to the client. If the `client_id' is specified then
4770 it is used and the `id_data' is ignored. */
4772 SilcSocketConnection
4773 silc_server_get_client_route(SilcServer server,
4774 unsigned char *id_data,
4776 SilcClientID *client_id,
4777 SilcIDListData *idata,
4778 SilcClientEntry *client_entry)
4781 SilcClientEntry client;
4783 SILC_LOG_DEBUG(("Start"));
4786 *client_entry = NULL;
4788 /* Decode destination Client ID */
4790 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4792 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4796 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4799 /* If the destination belongs to our server we don't have to route
4800 the packet anywhere but to send it to the local destination. */
4801 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4805 /* If we are router and the client has router then the client is in
4806 our cell but not directly connected to us. */
4807 if (server->server_type == SILC_ROUTER && client->router) {
4808 /* We are of course in this case the client's router thus the route
4809 to the client is the server who owns the client. So, we will send
4810 the packet to that server. */
4812 *idata = (SilcIDListData)client->router;
4813 return client->router->connection;
4816 /* Seems that client really is directly connected to us */
4818 *idata = (SilcIDListData)client;
4820 *client_entry = client;
4821 return client->connection;
4824 /* Destination belongs to someone not in this server. If we are normal
4825 server our action is to send the packet to our router. */
4826 if (server->server_type != SILC_ROUTER && !server->standalone) {
4829 *idata = (SilcIDListData)server->router;
4830 return SILC_PRIMARY_ROUTE(server);
4833 /* We are router and we will perform route lookup for the destination
4834 and send the packet to fastest route. */
4835 if (server->server_type == SILC_ROUTER && !server->standalone) {
4836 /* Check first that the ID is valid */
4837 client = silc_idlist_find_client_by_id(server->global_list, id,
4840 SilcSocketConnection dst_sock;
4842 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4846 *idata = (SilcIDListData)dst_sock->user_data;
4855 /* Encodes and returns channel list of channels the `client' has joined.
4856 Secret channels are not put to the list. */
4858 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4859 SilcClientEntry client,
4862 SilcBuffer *user_mode_list)
4864 SilcBuffer buffer = NULL;
4865 SilcChannelEntry channel;
4866 SilcChannelClientEntry chl;
4867 SilcHashTableList htl;
4870 SilcUInt16 name_len;
4874 *user_mode_list = NULL;
4876 silc_hash_table_list(client->channels, &htl);
4877 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4878 channel = chl->channel;
4880 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4882 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4885 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4886 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4887 name_len = strlen(channel->channel_name);
4889 len = 4 + name_len + id_len + 4;
4890 buffer = silc_buffer_realloc(buffer,
4891 (buffer ? buffer->truelen + len : len));
4892 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4893 silc_buffer_format(buffer,
4894 SILC_STR_UI_SHORT(name_len),
4895 SILC_STR_UI_XNSTRING(channel->channel_name,
4897 SILC_STR_UI_SHORT(id_len),
4898 SILC_STR_UI_XNSTRING(cid, id_len),
4899 SILC_STR_UI_INT(chl->channel->mode),
4901 silc_buffer_pull(buffer, len);
4904 if (user_mode_list) {
4905 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4907 (*user_mode_list)->truelen + 4 :
4909 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4910 (*user_mode_list)->data));
4911 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4912 silc_buffer_pull(*user_mode_list, 4);
4915 silc_hash_table_list_reset(&htl);
4918 silc_buffer_push(buffer, buffer->data - buffer->head);
4919 if (user_mode_list && *user_mode_list)
4920 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4921 (*user_mode_list)->head));
4926 /* Finds client entry by Client ID and if it is not found then resolves
4927 it using WHOIS command. */
4929 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4930 SilcClientID *client_id,
4931 bool always_resolve,
4934 SilcClientEntry client;
4939 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4942 client = silc_idlist_find_client_by_id(server->global_list,
4943 client_id, TRUE, NULL);
4944 if (!client && server->server_type == SILC_ROUTER)
4948 if (!client && server->standalone)
4951 if (!client || !client->nickname || !client->username ||
4953 SilcBuffer buffer, idp;
4956 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4957 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4958 client->resolve_cmd_ident = ++server->cmd_ident;
4961 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4962 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4963 server->cmd_ident, 1,
4964 4, idp->data, idp->len);
4965 silc_server_packet_send(server, client ? client->router->connection :
4966 SILC_PRIMARY_ROUTE(server),
4967 SILC_PACKET_COMMAND, 0,
4968 buffer->data, buffer->len, FALSE);
4969 silc_buffer_free(idp);
4970 silc_buffer_free(buffer);
4981 /* A timeout callback for the re-key. We will be the initiator of the
4984 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4986 SilcSocketConnection sock = (SilcSocketConnection)context;
4987 SilcIDListData idata = (SilcIDListData)sock->user_data;
4988 SilcServer server = (SilcServer)idata->rekey->context;
4989 SilcProtocol protocol;
4990 SilcServerRekeyInternalContext *proto_ctx;
4992 /* Allocate internal protocol context. This is sent as context
4994 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4995 proto_ctx->server = (void *)server;
4996 proto_ctx->sock = sock;
4997 proto_ctx->responder = FALSE;
4998 proto_ctx->pfs = idata->rekey->pfs;
5000 /* Perform rekey protocol. Will call the final callback after the
5001 protocol is over. */
5002 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5003 &protocol, proto_ctx, silc_server_rekey_final);
5004 sock->protocol = protocol;
5006 /* Run the protocol */
5007 silc_protocol_execute(protocol, server->schedule, 0, 0);
5009 SILC_LOG_DEBUG(("Rekey protocol completed"));
5011 /* Re-register re-key timeout */
5012 silc_schedule_task_add(server->schedule, sock->sock,
5013 silc_server_rekey_callback,
5014 context, idata->rekey->timeout, 0,
5015 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5018 /* The final callback for the REKEY protocol. This will actually take the
5019 new key material into use. */
5021 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5023 SilcProtocol protocol = (SilcProtocol)context;
5024 SilcServerRekeyInternalContext *ctx =
5025 (SilcServerRekeyInternalContext *)protocol->context;
5026 SilcServer server = (SilcServer)ctx->server;
5027 SilcSocketConnection sock = ctx->sock;
5029 SILC_LOG_DEBUG(("Start"));
5031 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5032 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5033 /* Error occured during protocol */
5034 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5035 silc_protocol_cancel(protocol, server->schedule);
5036 silc_protocol_free(protocol);
5037 sock->protocol = NULL;
5039 silc_packet_context_free(ctx->packet);
5041 silc_ske_free(ctx->ske);
5046 /* Purge the outgoing data queue to assure that all rekey packets really
5047 go to the network before we quit the protocol. */
5048 silc_server_packet_queue_purge(server, sock);
5051 silc_protocol_free(protocol);
5052 sock->protocol = NULL;
5054 silc_packet_context_free(ctx->packet);
5056 silc_ske_free(ctx->ske);
5060 /* Task callback used to retrieve network statistical information from
5061 router server once in a while. */
5063 SILC_TASK_CALLBACK(silc_server_get_stats)
5065 SilcServer server = (SilcServer)context;
5066 SilcBuffer idp, packet;
5068 SILC_LOG_DEBUG(("Retrieving stats from router"));
5070 if (!server->standalone) {
5071 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5072 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5073 ++server->cmd_ident, 1,
5074 1, idp->data, idp->len);
5075 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5076 SILC_PACKET_COMMAND, 0, packet->data,
5077 packet->len, FALSE);
5078 silc_buffer_free(packet);
5079 silc_buffer_free(idp);
5082 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5083 server, 120, 0, SILC_TASK_TIMEOUT,