5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 * This is the actual SILC server than handles everything relating to
21 * servicing the SILC connections. This is also a SILC router as a router
22 * is also normal server.
26 #include "serverincludes.h"
27 #include "server_internal.h"
29 /* Static prototypes */
30 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
81 SilcIDCacheEntry cache;
90 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
91 silc_dlist_del(server->sim, sim);
94 silc_dlist_uninit(server->sim);
98 silc_server_backup_free(server);
99 silc_server_config_unref(&server->config_ref);
101 silc_rng_free(server->rng);
103 silc_pkcs_free(server->pkcs);
104 if (server->public_key)
105 silc_pkcs_public_key_free(server->public_key);
106 if (server->private_key)
107 silc_pkcs_private_key_free(server->private_key);
108 if (server->pending_commands)
109 silc_dlist_uninit(server->pending_commands);
110 if (server->id_entry)
111 silc_idlist_del_server(server->local_list, server->id_entry);
113 /* Delete all channels */
115 if (silc_idcache_get_all(server->local_list->channels, &list) &&
116 silc_idcache_list_first(list, &cache)) {
117 silc_idlist_del_channel(server->local_list, cache->context);
118 while (silc_idcache_list_next(list, &cache))
119 silc_idlist_del_channel(server->local_list, cache->context);
122 silc_idcache_list_free(list);
124 if (silc_idcache_get_all(server->global_list->channels, &list) &&
125 silc_idcache_list_first(list, &cache)) {
126 silc_idlist_del_channel(server->global_list, cache->context);
127 while (silc_idcache_list_next(list, &cache))
128 silc_idlist_del_channel(server->global_list, cache->context);
131 silc_idcache_list_free(list);
133 /* Delete all clients */
135 if (silc_idcache_get_all(server->local_list->clients, &list) &&
136 silc_idcache_list_first(list, &cache)) {
137 silc_idlist_del_client(server->local_list, cache->context);
138 while (silc_idcache_list_next(list, &cache))
139 silc_idlist_del_client(server->local_list, cache->context);
142 silc_idcache_list_free(list);
144 if (silc_idcache_get_all(server->global_list->clients, &list) &&
145 silc_idcache_list_first(list, &cache)) {
146 silc_idlist_del_client(server->global_list, cache->context);
147 while (silc_idcache_list_next(list, &cache))
148 silc_idlist_del_client(server->global_list, cache->context);
151 silc_idcache_list_free(list);
153 /* Delete all servers */
155 if (silc_idcache_get_all(server->local_list->servers, &list) &&
156 silc_idcache_list_first(list, &cache)) {
157 silc_idlist_del_server(server->local_list, cache->context);
158 while (silc_idcache_list_next(list, &cache))
159 silc_idlist_del_server(server->local_list, cache->context);
162 silc_idcache_list_free(list);
164 if (silc_idcache_get_all(server->global_list->servers, &list) &&
165 silc_idcache_list_first(list, &cache)) {
166 silc_idlist_del_server(server->global_list, cache->context);
167 while (silc_idcache_list_next(list, &cache))
168 silc_idlist_del_server(server->global_list, cache->context);
171 silc_idcache_list_free(list);
173 silc_idcache_free(server->local_list->clients);
174 silc_idcache_free(server->local_list->servers);
175 silc_idcache_free(server->local_list->channels);
176 silc_idcache_free(server->global_list->clients);
177 silc_idcache_free(server->global_list->servers);
178 silc_idcache_free(server->global_list->channels);
179 silc_hash_table_free(server->watcher_list);
181 silc_hash_free(server->md5hash);
182 silc_hash_free(server->sha1hash);
183 silc_hmac_unregister_all();
184 silc_hash_unregister_all();
185 silc_cipher_unregister_all();
186 silc_pkcs_unregister_all();
188 silc_free(server->local_list);
189 silc_free(server->global_list);
190 silc_free(server->server_name);
191 silc_free(server->id_string);
192 silc_free(server->purge_i);
193 silc_free(server->purge_g);
197 /* Creates a new server listener. */
199 static bool silc_server_listen(SilcServer server, const char *server_ip,
200 SilcUInt16 port, int *sock)
202 *sock = silc_net_create_server(port, server_ip);
204 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
211 /* Adds a secondary listener. */
213 bool silc_server_init_secondary(SilcServer server)
215 int sock = 0, sock_list[server->config->param.connections_max];
216 SilcSocketConnection newsocket = NULL;
217 SilcServerConfigServerInfoInterface *interface;
219 for (interface = server->config->server_info->secondary; interface;
220 interface = interface->next, sock++) {
222 if (!silc_server_listen(server,
223 interface->server_ip, interface->port, &sock_list[sock]))
226 /* Set socket to non-blocking mode */
227 silc_net_set_socket_nonblock(sock_list[sock]);
229 /* Add ourselves also to the socket table. The entry allocated above
230 is sent as argument for fast referencing in the future. */
231 silc_socket_alloc(sock_list[sock],
232 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
233 server->sockets[sock_list[sock]] = newsocket;
234 SILC_SET_LISTENER(newsocket);
236 /* Perform name and address lookups to resolve the listenning address
238 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
240 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
242 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
243 newsocket->hostname ? newsocket->hostname :
244 newsocket->ip ? newsocket->ip : ""));
245 server->stat.conn_failures++;
248 if (!newsocket->hostname)
249 newsocket->hostname = strdup(newsocket->ip);
251 newsocket->port = silc_net_get_local_port(sock);
253 newsocket->user_data = (void *)server->id_entry;
254 silc_schedule_task_add(server->schedule, sock_list[sock],
255 silc_server_accept_new_connection,
256 (void *)server, 0, 0,
258 SILC_TASK_PRI_NORMAL);
264 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
268 /* Initializes the entire SILC server. This is called always before running
269 the server. This is called only once at the initialization of the program.
270 This binds the server to its listenning port. After this function returns
271 one should call silc_server_run to start the server. This returns TRUE
272 when everything is ok to run the server. Configuration file must be
273 read and parsed before calling this. */
275 bool silc_server_init(SilcServer server)
279 SilcServerEntry id_entry;
280 SilcIDListPurge purge;
281 SilcSocketConnection newsocket = NULL;
283 SILC_LOG_DEBUG(("Initializing server"));
285 server->starttime = time(NULL);
287 /* Take config object for us */
288 silc_server_config_ref(&server->config_ref, server->config,
291 /* Steal public and private key from the config object */
292 server->public_key = server->config->server_info->public_key;
293 server->private_key = server->config->server_info->private_key;
294 server->config->server_info->public_key = NULL;
295 server->config->server_info->private_key = NULL;
297 /* Register all configured ciphers, PKCS and hash functions. */
298 if (!silc_server_config_register_ciphers(server))
299 silc_cipher_register_default();
300 if (!silc_server_config_register_pkcs(server))
301 silc_pkcs_register_default();
302 if (!silc_server_config_register_hashfuncs(server))
303 silc_hash_register_default();
304 if (!silc_server_config_register_hmacs(server))
305 silc_hmac_register_default();
307 /* Initialize random number generator for the server. */
308 server->rng = silc_rng_alloc();
309 silc_rng_init(server->rng);
310 silc_rng_global_init(server->rng);
312 /* Initialize hash functions for server to use */
313 silc_hash_alloc("md5", &server->md5hash);
314 silc_hash_alloc("sha1", &server->sha1hash);
316 /* Allocate PKCS context for local public and private keys */
317 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
319 silc_pkcs_public_key_set(server->pkcs, server->public_key);
320 silc_pkcs_private_key_set(server->pkcs, server->private_key);
322 /* Initialize the scheduler */
323 server->schedule = silc_schedule_init(server->config->param.connections_max,
325 if (!server->schedule)
328 /* First, register log files configuration for error output */
329 silc_server_config_setlogfiles(server);
331 /* Initialize ID caches */
332 server->local_list->clients =
333 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
334 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
335 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
337 /* These are allocated for normal server as well as these hold some
338 global information that the server has fetched from its router. For
339 router these are used as they are supposed to be used on router. */
340 server->global_list->clients =
341 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
342 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
343 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
345 /* Init watcher list */
346 server->watcher_list =
347 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
348 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
350 if (!server->watcher_list)
353 /* Create a listening server */
354 if (!silc_server_listen(server,
355 server->config->server_info->primary == NULL ? NULL :
356 server->config->server_info->primary->server_ip,
357 server->config->server_info->primary == NULL ? 0 :
358 server->config->server_info->primary->port,
362 /* Set socket to non-blocking mode */
363 silc_net_set_socket_nonblock(sock);
366 /* Allocate the entire socket list that is used in server. Eventually
367 all connections will have entry in this table (it is a table of
368 pointers to the actual object that is allocated individually
370 server->sockets = silc_calloc(server->config->param.connections_max,
371 sizeof(*server->sockets));
372 if (!server->sockets)
375 /* Add ourselves also to the socket table. The entry allocated above
376 is sent as argument for fast referencing in the future. */
377 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
378 server->sockets[sock] = newsocket;
379 SILC_SET_LISTENER(newsocket);
381 /* Perform name and address lookups to resolve the listenning address
383 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
385 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
387 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
388 newsocket->hostname ? newsocket->hostname :
389 newsocket->ip ? newsocket->ip : ""));
390 server->stat.conn_failures++;
393 if (!newsocket->hostname)
394 newsocket->hostname = strdup(newsocket->ip);
396 newsocket->port = silc_net_get_local_port(sock);
398 /* Create a Server ID for the server. */
399 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
404 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
405 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
406 server->server_name = server->config->server_info->server_name;
407 server->config->server_info->server_name = NULL;
409 /* Add ourselves to the server list. We don't have a router yet
410 beacuse we haven't established a route yet. It will be done later.
411 For now, NULL is sent as router. This allocates new entry to
414 silc_idlist_add_server(server->local_list, strdup(server->server_name),
415 server->server_type, server->id, NULL, NULL);
417 SILC_LOG_ERROR(("Could not add ourselves to cache"));
420 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
422 /* Put the allocated socket pointer also to the entry allocated above
423 for fast back-referencing to the socket list. */
424 newsocket->user_data = (void *)id_entry;
425 id_entry->connection = (void *)newsocket;
426 server->id_entry = id_entry;
428 /* Register protocols */
429 silc_server_protocols_register();
431 /* Add the first task to the scheduler. This is task that is executed by
432 timeout. It expires as soon as the caller calls silc_server_run. This
433 task performs authentication protocol and key exchange with our
435 silc_schedule_task_add(server->schedule, 0,
436 silc_server_connect_to_router,
437 (void *)server, 0, 1,
439 SILC_TASK_PRI_NORMAL);
441 /* Add listener task to the scheduler. This task receives new connections
442 to the server. This task remains on the queue until the end of the
444 silc_schedule_task_add(server->schedule, sock,
445 silc_server_accept_new_connection,
446 (void *)server, 0, 0,
448 SILC_TASK_PRI_NORMAL);
450 if (silc_server_init_secondary(server) == FALSE)
453 server->listenning = TRUE;
455 /* If server connections has been configured then we must be router as
456 normal server cannot have server connections, only router connections. */
457 if (server->config->servers) {
458 SilcServerConfigServer *ptr = server->config->servers;
460 server->server_type = SILC_ROUTER;
462 if (ptr->backup_router) {
463 server->server_type = SILC_BACKUP_ROUTER;
464 server->backup_router = TRUE;
465 server->id_entry->server_type = SILC_BACKUP_ROUTER;
472 /* Register the ID Cache purge task. This periodically purges the ID cache
473 and removes the expired cache entries. */
475 /* Clients local list */
476 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
477 purge->cache = server->local_list->clients;
478 purge->timeout = 600;
479 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
480 (void *)purge, purge->timeout, 0,
481 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
483 /* Clients global list */
484 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
485 purge->cache = server->global_list->clients;
486 purge->timeout = 300;
487 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
488 (void *)purge, purge->timeout, 0,
489 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
491 /* If we are normal server we'll retrieve network statisticial information
492 once in a while from the router. */
493 if (server->server_type == SILC_SERVER)
494 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
495 server, 10, 0, SILC_TASK_TIMEOUT,
498 if (server->server_type == SILC_ROUTER)
499 server->stat.routers++;
501 SILC_LOG_DEBUG(("Server initialized"));
503 /* We are done here, return succesfully */
507 silc_server_config_unref(&server->config_ref);
508 silc_net_close_server(sock);
512 /* Task callback to close a socket connection after rehash */
514 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
516 SilcServer server = context;
517 SilcSocketConnection sock = server->sockets[fd];
522 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
523 sock->hostname, sock->port,
524 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
525 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
526 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
528 silc_schedule_task_del_by_context(server->schedule, sock);
529 silc_server_disconnect_remote(server, sock,
530 SILC_STATUS_ERR_BANNED_FROM_SERVER,
531 "This connection is removed from "
534 silc_server_free_sock_user_data(server, sock, NULL);
537 /* This function basically reads the config file again and switches the config
538 object pointed by the server object. After that, we have to fix various
539 things such as the server_name and the listening ports.
540 Keep in mind that we no longer have the root privileges at this point. */
542 bool silc_server_rehash(SilcServer server)
544 SilcServerConfig newconfig;
546 SILC_LOG_INFO(("Rehashing server"));
548 /* Reset the logging system */
549 silc_log_quick = TRUE;
550 silc_log_flush_all();
552 /* Start the main rehash phase (read again the config file) */
553 newconfig = silc_server_config_alloc(server->config_file);
555 SILC_LOG_ERROR(("Rehash FAILED."));
559 /* Reinit scheduler if necessary */
560 if (newconfig->param.connections_max > server->config->param.connections_max)
561 if (!silc_schedule_reinit(server->schedule,
562 newconfig->param.connections_max))
565 /* Fix the server_name field */
566 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
567 silc_free(server->server_name);
568 server->server_name = newconfig->server_info->server_name;
569 newconfig->server_info->server_name = NULL;
571 /* Update the idcache list with a fresh pointer */
572 silc_free(server->id_entry->server_name);
573 server->id_entry->server_name = strdup(server->server_name);
574 if (!silc_idcache_del_by_context(server->local_list->servers,
577 if (!silc_idcache_add(server->local_list->servers,
578 server->id_entry->server_name,
579 server->id_entry->id, server->id_entry, 0, NULL))
584 silc_server_config_setlogfiles(server);
586 /* Change new key pair if necessary */
587 if (newconfig->server_info->public_key &&
588 !silc_pkcs_public_key_compare(server->public_key,
589 newconfig->server_info->public_key)) {
590 silc_pkcs_public_key_free(server->public_key);
591 silc_pkcs_private_key_free(server->private_key);
592 server->public_key = newconfig->server_info->public_key;
593 server->private_key = newconfig->server_info->private_key;
594 newconfig->server_info->public_key = NULL;
595 newconfig->server_info->private_key = NULL;
597 /* Allocate PKCS context for local public and private keys */
598 silc_pkcs_free(server->pkcs);
599 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
601 silc_pkcs_public_key_set(server->pkcs, server->public_key);
602 silc_pkcs_private_key_set(server->pkcs, server->private_key);
605 /* Check for unconfigured server and router connections and close
606 connections that were unconfigured. */
608 if (server->config->routers) {
609 SilcServerConfigRouter *ptr;
610 SilcServerConfigRouter *newptr;
613 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
616 /* Check whether new config has this one too */
617 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
618 if (silc_string_compare(newptr->host, ptr->host) &&
619 newptr->port == ptr->port &&
620 newptr->initiator == ptr->initiator) {
626 if (!found && ptr->host) {
627 /* Remove this connection */
628 SilcSocketConnection sock;
629 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
630 ptr->host, ptr->port);
631 if (sock && !SILC_IS_LISTENER(sock))
632 silc_schedule_task_add(server->schedule, sock->sock,
633 silc_server_rehash_close_connection,
634 server, 0, 1, SILC_TASK_TIMEOUT,
635 SILC_TASK_PRI_NORMAL);
640 if (server->config->servers) {
641 SilcServerConfigServer *ptr;
642 SilcServerConfigServer *newptr;
645 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
648 /* Check whether new config has this one too */
649 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
650 if (silc_string_compare(newptr->host, ptr->host)) {
656 if (!found && ptr->host) {
657 /* Remove this connection */
658 SilcSocketConnection sock;
659 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
661 if (sock && !SILC_IS_LISTENER(sock))
662 silc_schedule_task_add(server->schedule, sock->sock,
663 silc_server_rehash_close_connection,
664 server, 0, 1, SILC_TASK_TIMEOUT,
665 SILC_TASK_PRI_NORMAL);
670 if (server->config->clients) {
671 SilcServerConfigClient *ptr;
672 SilcServerConfigClient *newptr;
675 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
678 /* Check whether new config has this one too */
679 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
680 if (silc_string_compare(newptr->host, ptr->host)) {
686 if (!found && ptr->host) {
687 /* Remove this connection */
688 SilcSocketConnection sock;
689 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
692 silc_schedule_task_add(server->schedule, sock->sock,
693 silc_server_rehash_close_connection,
694 server, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
700 /* Go through all configured routers after rehash */
701 silc_schedule_task_add(server->schedule, 0,
702 silc_server_connect_to_router,
703 (void *)server, 0, 1,
705 SILC_TASK_PRI_NORMAL);
707 /* Check whether our router status has changed */
708 if (newconfig->servers) {
709 SilcServerConfigServer *ptr = newconfig->servers;
711 server->server_type = SILC_ROUTER;
713 if (ptr->backup_router) {
714 server->server_type = SILC_BACKUP_ROUTER;
715 server->backup_router = TRUE;
716 server->id_entry->server_type = SILC_BACKUP_ROUTER;
723 /* Our old config is gone now. We'll unreference our reference made in
724 silc_server_init and then destroy it since we are destroying it
725 underneath the application (layer which called silc_server_init). */
726 silc_server_config_unref(&server->config_ref);
727 silc_server_config_destroy(server->config);
729 /* Take new config context */
730 server->config = newconfig;
731 silc_server_config_ref(&server->config_ref, server->config, server->config);
733 SILC_LOG_DEBUG(("Server rehashed"));
738 /* The heart of the server. This runs the scheduler thus runs the server.
739 When this returns the server has been stopped and the program will
742 void silc_server_run(SilcServer server)
744 SILC_LOG_INFO(("SILC Server started"));
746 /* Start the scheduler, the heart of the SILC server. When this returns
747 the program will be terminated. */
748 silc_schedule(server->schedule);
751 /* Stops the SILC server. This function is used to shutdown the server.
752 This is usually called after the scheduler has returned. After stopping
753 the server one should call silc_server_free. */
755 void silc_server_stop(SilcServer server)
757 SILC_LOG_INFO(("SILC Server shutting down"));
759 if (server->schedule) {
762 server->server_shutdown = TRUE;
764 /* Close all connections */
765 for (i = 0; i < server->config->param.connections_max; i++) {
766 if (!server->sockets[i])
768 if (!SILC_IS_LISTENER(server->sockets[i])) {
769 SilcSocketConnection sock = server->sockets[i];
770 SilcIDListData idata = sock->user_data;
773 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
775 silc_schedule_task_del_by_context(server->schedule,
777 silc_server_disconnect_remote(server, server->sockets[i],
779 "Server is shutting down");
781 silc_server_free_sock_user_data(server, sock,
782 "Server is shutting down");
783 silc_socket_free(sock);
785 silc_socket_free(server->sockets[i]);
786 server->sockets[i] = NULL;
790 /* We are not connected to network anymore */
791 server->standalone = TRUE;
793 silc_schedule_stop(server->schedule);
794 silc_schedule_uninit(server->schedule);
795 server->schedule = NULL;
797 silc_free(server->sockets);
798 server->sockets = NULL;
801 silc_server_protocols_unregister();
803 SILC_LOG_DEBUG(("Server stopped"));
806 /* Function that is called when the network connection to a router has
807 been established. This will continue with the key exchange protocol
808 with the remote router. */
810 void silc_server_start_key_exchange(SilcServer server,
811 SilcServerConnection sconn,
814 SilcSocketConnection newsocket;
815 SilcProtocol protocol;
816 SilcServerKEInternalContext *proto_ctx;
817 SilcServerConfigRouter *conn =
818 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
821 /* Cancel any possible retry timeouts */
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Set socket options */
826 silc_net_set_socket_nonblock(sock);
827 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
829 /* Create socket connection for the connection. Even though we
830 know that we are connecting to a router we will mark the socket
831 to be unknown connection until we have executed authentication
833 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
834 server->sockets[sock] = newsocket;
835 newsocket->hostname = strdup(sconn->remote_host);
836 newsocket->ip = strdup(sconn->remote_host);
837 newsocket->port = sconn->remote_port;
838 sconn->sock = newsocket;
840 /* Allocate internal protocol context. This is sent as context
842 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
843 proto_ctx->server = (void *)server;
844 proto_ctx->context = (void *)sconn;
845 proto_ctx->sock = newsocket;
846 proto_ctx->rng = server->rng;
847 proto_ctx->responder = FALSE;
849 /* Set Key Exchange flags from configuration, but fall back to global
851 SILC_GET_SKE_FLAGS(conn, proto_ctx);
852 if (server->config->param.key_exchange_pfs)
853 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
855 /* Perform key exchange protocol. silc_server_connect_to_router_second
856 will be called after the protocol is finished. */
857 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
858 &protocol, proto_ctx,
859 silc_server_connect_to_router_second);
860 newsocket->protocol = protocol;
862 /* Register a timeout task that will be executed if the protocol
863 is not executed within set limit. */
864 proto_ctx->timeout_task =
865 silc_schedule_task_add(server->schedule, sock,
866 silc_server_timeout_remote,
867 server, server->config->key_exchange_timeout, 0,
871 /* Register the connection for network input and output. This sets
872 that scheduler will listen for incoming packets for this connection
873 and sets that outgoing packets may be sent to this connection as
874 well. However, this doesn't set the scheduler for outgoing traffic,
875 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
876 later when outgoing data is available. */
877 context = (void *)server;
878 SILC_REGISTER_CONNECTION_FOR_IO(sock);
880 /* Run the protocol */
881 silc_protocol_execute(protocol, server->schedule, 0, 0);
884 /* Timeout callback that will be called to retry connecting to remote
885 router. This is used by both normal and router server. This will wait
886 before retrying the connecting. The timeout is generated by exponential
887 backoff algorithm. */
889 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
891 SilcServer server = app_context;
892 SilcServerConnection sconn = (SilcServerConnection)context;
893 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
894 SilcServerConfigConnParams *param =
895 (conn->param ? conn->param : &server->config->param);
897 /* Don't retry if we are shutting down. */
898 if (server->server_shutdown) {
899 silc_server_config_unref(&sconn->conn);
900 silc_free(sconn->remote_host);
901 silc_free(sconn->backup_replace_ip);
906 SILC_LOG_INFO(("Retrying connecting to a router"));
908 /* Calculate next timeout */
909 if (sconn->retry_count >= 1) {
910 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
911 if (sconn->retry_timeout > param->reconnect_interval_max)
912 sconn->retry_timeout = param->reconnect_interval_max;
914 sconn->retry_timeout = param->reconnect_interval;
916 sconn->retry_count++;
917 sconn->retry_timeout = sconn->retry_timeout +
918 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
920 /* If we've reached max retry count, give up. */
921 if ((sconn->retry_count > param->reconnect_count) &&
922 !param->reconnect_keep_trying) {
923 SILC_LOG_ERROR(("Could not connect to router, giving up"));
924 silc_server_config_unref(&sconn->conn);
925 silc_free(sconn->remote_host);
926 silc_free(sconn->backup_replace_ip);
931 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
932 sconn->retry_timeout));
934 /* We will lookup a fresh pointer later */
935 silc_server_config_unref(&sconn->conn);
937 /* Wait one before retrying */
938 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
939 context, sconn->retry_timeout, 0,
940 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
943 /* Generic routine to use connect to a router. */
945 SILC_TASK_CALLBACK(silc_server_connect_router)
947 SilcServer server = app_context;
948 SilcServerConnection sconn = (SilcServerConnection)context;
949 SilcServerConfigRouter *rconn;
952 /* Don't connect if we are shutting down. */
953 if (server->server_shutdown) {
954 silc_free(sconn->remote_host);
955 silc_free(sconn->backup_replace_ip);
960 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
961 (sconn->backup ? "backup router" : "router"),
962 sconn->remote_host, sconn->remote_port));
964 server->router_connect = time(NULL);
965 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
968 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
969 (sconn->backup ? "backup router" : "router"),
970 sconn->remote_host, sconn->remote_port));
971 silc_free(sconn->remote_host);
972 silc_free(sconn->backup_replace_ip);
976 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
978 /* Connect to remote host */
979 sock = silc_net_create_connection(
980 (!server->config->server_info->primary ? NULL :
981 server->config->server_info->primary->server_ip),
982 sconn->remote_port, sconn->remote_host);
984 SILC_LOG_ERROR(("Could not connect to router %s:%d",
985 sconn->remote_host, sconn->remote_port));
986 if (!sconn->no_reconnect)
987 silc_schedule_task_add(server->schedule, 0,
988 silc_server_connect_to_router_retry,
989 context, 0, 1, SILC_TASK_TIMEOUT,
990 SILC_TASK_PRI_NORMAL);
992 silc_server_config_unref(&sconn->conn);
996 /* Continue with key exchange protocol */
997 silc_server_start_key_exchange(server, sconn, sock);
1000 /* This function connects to our primary router or if we are a router this
1001 establishes all our primary routes. This is called at the start of the
1002 server to do authentication and key exchange with our router - called
1005 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1007 SilcServer server = (SilcServer)context;
1008 SilcServerConnection sconn;
1009 SilcServerConfigRouter *ptr;
1011 /* Don't connect if we are shutting down. */
1012 if (server->server_shutdown)
1015 SILC_LOG_DEBUG(("We are %s",
1016 (server->server_type == SILC_SERVER ?
1017 "normal server" : server->server_type == SILC_ROUTER ?
1018 "router" : "backup router/normal server")));
1020 if (!server->config->routers) {
1021 /* There wasn't a configured router, we will continue but we don't
1022 have a connection to outside world. We will be standalone server. */
1023 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1024 server->standalone = TRUE;
1028 /* Cancel any possible retry timeouts */
1029 silc_schedule_task_del_by_callback(server->schedule,
1030 silc_server_connect_router);
1031 silc_schedule_task_del_by_callback(server->schedule,
1032 silc_server_connect_to_router_retry);
1034 /* Create the connections to all our routes */
1035 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1037 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1038 ptr->backup_router ? "Backup router" : "Router",
1039 ptr->initiator ? "Initiator" : "Responder",
1040 ptr->host, ptr->port));
1042 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1043 ptr->initiator == FALSE && !server->backup_router &&
1044 !silc_server_config_get_backup_router(server))
1045 server->wait_backup = TRUE;
1047 if (ptr->initiator) {
1048 /* Check whether we are connected to this host already */
1049 if (silc_server_num_sockets_by_remote(server,
1050 silc_net_is_ip(ptr->host) ?
1052 silc_net_is_ip(ptr->host) ?
1053 NULL : ptr->host, ptr->port,
1054 SILC_SOCKET_TYPE_ROUTER)) {
1055 SILC_LOG_DEBUG(("We are already connected to this router"));
1059 /* Allocate connection object for hold connection specific stuff. */
1060 sconn = silc_calloc(1, sizeof(*sconn));
1061 sconn->remote_host = strdup(ptr->host);
1062 sconn->remote_port = ptr->port;
1063 sconn->backup = ptr->backup_router;
1064 if (sconn->backup) {
1065 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1066 sconn->backup_replace_port = ptr->backup_replace_port;
1069 if (!server->router_conn && !sconn->backup)
1070 server->router_conn = sconn;
1072 silc_schedule_task_add(server->schedule, 0,
1073 silc_server_connect_router,
1074 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1075 SILC_TASK_PRI_NORMAL);
1080 /* Second part of connecting to router(s). Key exchange protocol has been
1081 executed and now we will execute authentication protocol. */
1083 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1085 SilcProtocol protocol = (SilcProtocol)context;
1086 SilcServerKEInternalContext *ctx =
1087 (SilcServerKEInternalContext *)protocol->context;
1088 SilcServer server = (SilcServer)ctx->server;
1089 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1090 SilcSocketConnection sock = ctx->sock;
1091 SilcServerConnAuthInternalContext *proto_ctx;
1092 SilcServerConfigRouter *conn = NULL;
1094 SILC_LOG_DEBUG(("Start"));
1096 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1097 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1098 /* Error occured during protocol */
1099 silc_protocol_free(protocol);
1100 sock->protocol = NULL;
1101 silc_ske_free_key_material(ctx->keymat);
1103 silc_packet_context_free(ctx->packet);
1105 silc_ske_free(ctx->ske);
1106 silc_free(ctx->dest_id);
1108 silc_schedule_task_del_by_callback(server->schedule,
1109 silc_server_failure_callback);
1110 silc_server_disconnect_remote(server, sock,
1111 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1113 /* Try reconnecting if configuration wants it */
1114 if (!sconn->no_reconnect) {
1115 silc_schedule_task_add(server->schedule, 0,
1116 silc_server_connect_to_router_retry,
1117 sconn, 0, 1, SILC_TASK_TIMEOUT,
1118 SILC_TASK_PRI_NORMAL);
1122 /* Call completion to indicate error */
1123 if (sconn->callback)
1124 (*sconn->callback)(server, NULL, sconn->callback_context);
1126 silc_server_config_unref(&sconn->conn);
1127 silc_free(sconn->remote_host);
1128 silc_free(sconn->backup_replace_ip);
1133 /* We now have the key material as the result of the key exchange
1134 protocol. Take the key material into use. Free the raw key material
1135 as soon as we've set them into use. */
1136 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1137 ctx->sock, ctx->keymat,
1138 ctx->ske->prop->cipher,
1139 ctx->ske->prop->pkcs,
1140 ctx->ske->prop->hash,
1141 ctx->ske->prop->hmac,
1142 ctx->ske->prop->group,
1144 silc_protocol_free(protocol);
1145 sock->protocol = NULL;
1146 silc_ske_free_key_material(ctx->keymat);
1148 silc_packet_context_free(ctx->packet);
1150 silc_ske_free(ctx->ske);
1151 silc_free(ctx->dest_id);
1153 silc_schedule_task_del_by_callback(server->schedule,
1154 silc_server_failure_callback);
1155 silc_server_disconnect_remote(server, sock,
1156 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1158 /* Try reconnecting if configuration wants it */
1159 if (!sconn->no_reconnect) {
1160 silc_schedule_task_add(server->schedule, 0,
1161 silc_server_connect_to_router_retry,
1162 sconn, 0, 1, SILC_TASK_TIMEOUT,
1163 SILC_TASK_PRI_NORMAL);
1167 /* Call completion to indicate error */
1168 if (sconn->callback)
1169 (*sconn->callback)(server, NULL, sconn->callback_context);
1171 silc_server_config_unref(&sconn->conn);
1172 silc_free(sconn->remote_host);
1173 silc_free(sconn->backup_replace_ip);
1177 silc_ske_free_key_material(ctx->keymat);
1179 /* Allocate internal context for the authentication protocol. This
1180 is sent as context for the protocol. */
1181 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1182 proto_ctx->server = (void *)server;
1183 proto_ctx->context = (void *)sconn;
1184 proto_ctx->sock = sock;
1185 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1186 proto_ctx->dest_id_type = ctx->dest_id_type;
1187 proto_ctx->dest_id = ctx->dest_id;
1189 /* Resolve the authentication method used in this connection. Check if
1190 we find a match from user configured connections */
1191 if (!sconn->conn.ref_ptr)
1192 conn = silc_server_config_find_router_conn(server, sock->hostname,
1195 conn = sconn->conn.ref_ptr;
1198 /* Match found. Use the configured authentication method. Take only
1199 the passphrase, since for public key auth we automatically use
1200 our local key pair. */
1201 if (conn->passphrase) {
1202 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1203 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1205 proto_ctx->auth_data = strdup(conn->passphrase);
1206 proto_ctx->auth_data_len = strlen(conn->passphrase);
1207 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1209 } else if (conn->publickeys) {
1210 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1212 proto_ctx->auth_meth = SILC_AUTH_NONE;
1215 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1216 sock->hostname, sock->ip, sock->port));
1217 silc_protocol_free(protocol);
1218 sock->protocol = NULL;
1220 silc_packet_context_free(ctx->packet);
1222 silc_ske_free(ctx->ske);
1223 silc_free(ctx->dest_id);
1225 silc_server_config_unref(&sconn->conn);
1226 silc_free(sconn->remote_host);
1227 silc_free(sconn->backup_replace_ip);
1229 silc_schedule_task_del_by_callback(server->schedule,
1230 silc_server_failure_callback);
1231 silc_server_disconnect_remote(server, sock,
1232 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1236 /* Free old protocol as it is finished now */
1237 silc_protocol_free(protocol);
1239 silc_packet_context_free(ctx->packet);
1241 sock->protocol = NULL;
1243 /* Allocate the authentication protocol. This is allocated here
1244 but we won't start it yet. We will be receiving party of this
1245 protocol thus we will wait that connecting party will make
1246 their first move. */
1247 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1248 &sock->protocol, proto_ctx,
1249 silc_server_connect_to_router_final);
1251 /* Register timeout task. If the protocol is not executed inside
1252 this timelimit the connection will be terminated. */
1253 proto_ctx->timeout_task =
1254 silc_schedule_task_add(server->schedule, sock->sock,
1255 silc_server_timeout_remote,
1257 server->config->conn_auth_timeout, 0,
1261 /* Run the protocol */
1262 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1265 /* Finalizes the connection to router. Registers a server task to the
1266 queue so that we can accept new connections. */
1268 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1270 SilcProtocol protocol = (SilcProtocol)context;
1271 SilcServerConnAuthInternalContext *ctx =
1272 (SilcServerConnAuthInternalContext *)protocol->context;
1273 SilcServer server = (SilcServer)ctx->server;
1274 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1275 SilcSocketConnection sock = ctx->sock;
1276 SilcServerEntry id_entry = NULL;
1278 unsigned char *id_string;
1280 SilcIDListData idata;
1281 SilcServerConfigRouter *conn = NULL;
1282 SilcServerConfigConnParams *param = NULL;
1284 SILC_LOG_DEBUG(("Start"));
1286 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1287 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1288 /* Error occured during protocol */
1289 silc_free(ctx->dest_id);
1290 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1293 /* Try reconnecting if configuration wants it */
1294 if (!sconn->no_reconnect) {
1295 silc_schedule_task_add(server->schedule, 0,
1296 silc_server_connect_to_router_retry,
1297 sconn, 0, 1, SILC_TASK_TIMEOUT,
1298 SILC_TASK_PRI_NORMAL);
1305 /* Add a task to the queue. This task receives new connections to the
1306 server. This task remains on the queue until the end of the program. */
1307 if (!server->listenning && !sconn->backup) {
1308 silc_schedule_task_add(server->schedule, server->sock,
1309 silc_server_accept_new_connection,
1310 (void *)server, 0, 0,
1312 SILC_TASK_PRI_NORMAL);
1313 server->listenning = TRUE;
1316 /* Send NEW_SERVER packet to the router. We will become registered
1317 to the SILC network after sending this packet. */
1318 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1319 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1320 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1321 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1322 silc_buffer_format(packet,
1323 SILC_STR_UI_SHORT(id_len),
1324 SILC_STR_UI_XNSTRING(id_string, id_len),
1325 SILC_STR_UI_SHORT(strlen(server->server_name)),
1326 SILC_STR_UI_XNSTRING(server->server_name,
1327 strlen(server->server_name)),
1330 /* Send the packet */
1331 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1332 packet->data, packet->len, TRUE);
1333 silc_buffer_free(packet);
1334 silc_free(id_string);
1336 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1338 /* Check that we do not have this ID already */
1339 id_entry = silc_idlist_find_server_by_id(server->local_list,
1340 ctx->dest_id, TRUE, NULL);
1342 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1344 id_entry = silc_idlist_find_server_by_id(server->global_list,
1345 ctx->dest_id, TRUE, NULL);
1347 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1350 SILC_LOG_DEBUG(("New server id(%s)",
1351 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1353 /* Add the connected router to global server list. Router is sent
1354 as NULL since it's local to us. */
1355 id_entry = silc_idlist_add_server(server->global_list,
1356 strdup(sock->hostname),
1357 SILC_ROUTER, ctx->dest_id, NULL, sock);
1359 silc_free(ctx->dest_id);
1360 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1361 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1366 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1367 silc_free(sock->user_data);
1368 sock->user_data = (void *)id_entry;
1369 sock->type = SILC_SOCKET_TYPE_ROUTER;
1370 idata = (SilcIDListData)sock->user_data;
1371 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1372 SILC_IDLIST_STATUS_LOCAL);
1374 conn = sconn->conn.ref_ptr;
1375 param = &server->config->param;
1376 if (conn && conn->param)
1377 param = conn->param;
1379 /* Perform keepalive. The `hb_context' will be freed automatically
1380 when finally calling the silc_socket_free function. */
1381 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1382 silc_server_perform_heartbeat,
1385 /* Register re-key timeout */
1386 idata->rekey->timeout = param->key_exchange_rekey;
1387 silc_schedule_task_add(server->schedule, sock->sock,
1388 silc_server_rekey_callback,
1389 (void *)sock, idata->rekey->timeout, 0,
1390 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1392 if (!sconn->backup) {
1393 /* Mark this router our primary router if we're still standalone */
1394 if (server->standalone) {
1395 SILC_LOG_DEBUG(("This connection is our primary router"));
1396 server->id_entry->router = id_entry;
1397 server->router = id_entry;
1398 server->standalone = FALSE;
1400 /* If we are router then announce our possible servers. Backup
1401 router announces also global servers. */
1402 if (server->server_type == SILC_ROUTER)
1403 silc_server_announce_servers(server,
1404 server->backup_router ? TRUE : FALSE,
1405 0, SILC_PRIMARY_ROUTE(server));
1407 /* Announce our clients and channels to the router */
1408 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1409 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1411 /* If we are backup router then this primary router is whom we are
1413 if (server->server_type == SILC_BACKUP_ROUTER)
1414 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1417 /* Add this server to be our backup router */
1418 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1419 sconn->backup_replace_port, FALSE);
1422 sock->protocol = NULL;
1425 /* Call the completion callback to indicate that we've connected to
1427 if (sconn && sconn->callback)
1428 (*sconn->callback)(server, id_entry, sconn->callback_context);
1430 /* Free the temporary connection data context */
1432 silc_server_config_unref(&sconn->conn);
1433 silc_free(sconn->remote_host);
1434 silc_free(sconn->backup_replace_ip);
1437 if (sconn == server->router_conn)
1438 server->router_conn = NULL;
1441 /* Free the protocol object */
1442 if (sock->protocol == protocol)
1443 sock->protocol = NULL;
1444 silc_protocol_free(protocol);
1446 silc_packet_context_free(ctx->packet);
1448 silc_ske_free(ctx->ske);
1449 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1450 silc_free(ctx->auth_data);
1454 /* Host lookup callback that is called after the incoming connection's
1455 IP and FQDN lookup is performed. This will actually check the acceptance
1456 of the incoming connection and will register the key exchange protocol
1457 for this connection. */
1460 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1463 SilcServerKEInternalContext *proto_ctx =
1464 (SilcServerKEInternalContext *)context;
1465 SilcServer server = (SilcServer)proto_ctx->server;
1466 SilcServerConfigClient *cconfig = NULL;
1467 SilcServerConfigServer *sconfig = NULL;
1468 SilcServerConfigRouter *rconfig = NULL;
1469 SilcServerConfigDeny *deny;
1472 /* Check whether we could resolve both IP and FQDN. */
1473 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1474 server->config->require_reverse_lookup)) {
1475 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1476 sock->hostname ? sock->hostname :
1477 sock->ip ? sock->ip : ""));
1478 server->stat.conn_failures++;
1479 silc_server_disconnect_remote(server, sock,
1480 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1481 "Unknown host or IP");
1482 silc_free(proto_ctx);
1486 /* Register the connection for network input and output. This sets
1487 that scheduler will listen for incoming packets for this connection
1488 and sets that outgoing packets may be sent to this connection as well.
1489 However, this doesn't set the scheduler for outgoing traffic, it
1490 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1491 later when outgoing data is available. */
1492 context = (void *)server;
1493 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1495 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1498 /* Listenning port */
1499 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1500 silc_server_disconnect_remote(server, sock,
1501 SILC_STATUS_ERR_RESOURCE_LIMIT,
1502 "Connection refused");
1503 server->stat.conn_failures++;
1504 silc_free(proto_ctx);
1507 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1509 /* Check whether this connection is denied to connect to us. */
1510 deny = silc_server_config_find_denied(server, sock->ip);
1512 deny = silc_server_config_find_denied(server, sock->hostname);
1514 /* The connection is denied */
1515 SILC_LOG_INFO(("Connection %s (%s) is denied",
1516 sock->hostname, sock->ip));
1517 silc_server_disconnect_remote(server, sock,
1518 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1520 server->stat.conn_failures++;
1521 silc_free(proto_ctx);
1525 /* Check whether we have configured this sort of connection at all. We
1526 have to check all configurations since we don't know what type of
1527 connection this is. */
1528 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1529 cconfig = silc_server_config_find_client(server, sock->hostname);
1530 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1531 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1532 if (server->server_type == SILC_ROUTER) {
1533 if (!(rconfig = silc_server_config_find_router_conn(server,
1534 sock->ip, sock->port)))
1535 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1538 if (!cconfig && !sconfig && !rconfig) {
1539 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1541 silc_server_disconnect_remote(server, sock,
1542 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1543 server->stat.conn_failures++;
1544 silc_free(proto_ctx);
1548 /* The connection is allowed */
1550 /* Set internal context for key exchange protocol. This is
1551 sent as context for the protocol. */
1552 proto_ctx->sock = sock;
1553 proto_ctx->rng = server->rng;
1554 proto_ctx->responder = TRUE;
1555 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1556 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1557 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1559 /* Take flags for key exchange. Since we do not know what type of connection
1560 this is, we go through all found configurations and use the global ones
1561 as well. This will result always into strictest key exchange flags. */
1562 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1563 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1564 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1565 if (server->config->param.key_exchange_pfs)
1566 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1568 /* Prepare the connection for key exchange protocol. We allocate the
1569 protocol but will not start it yet. The connector will be the
1570 initiator of the protocol thus we will wait for initiation from
1571 there before we start the protocol. */
1572 server->stat.auth_attempts++;
1573 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1574 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1575 &sock->protocol, proto_ctx,
1576 silc_server_accept_new_connection_second);
1578 /* Register a timeout task that will be executed if the connector
1579 will not start the key exchange protocol within specified timeout
1580 and the connection will be closed. */
1581 proto_ctx->timeout_task =
1582 silc_schedule_task_add(server->schedule, sock->sock,
1583 silc_server_timeout_remote,
1585 server->config->key_exchange_timeout, 0,
1590 /* Accepts new connections to the server. Accepting new connections are
1591 done in three parts to make it async. */
1593 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1595 SilcServer server = (SilcServer)context;
1596 SilcSocketConnection newsocket;
1597 SilcServerKEInternalContext *proto_ctx;
1600 SILC_LOG_DEBUG(("Accepting new connection"));
1602 server->stat.conn_attempts++;
1604 sock = silc_net_accept_connection(fd);
1606 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1607 server->stat.conn_failures++;
1611 /* Check for maximum allowed connections */
1612 if (sock > server->config->param.connections_max) {
1613 SILC_LOG_ERROR(("Refusing connection, server is full"));
1614 server->stat.conn_failures++;
1615 silc_net_close_connection(sock);
1619 /* Set socket options */
1620 silc_net_set_socket_nonblock(sock);
1621 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1623 /* We don't create a ID yet, since we don't know what type of connection
1624 this is yet. But, we do add the connection to the socket table. */
1625 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1626 server->sockets[sock] = newsocket;
1628 /* Perform asynchronous host lookup. This will lookup the IP and the
1629 FQDN of the remote connection. After the lookup is done the connection
1630 is accepted further. */
1631 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1632 proto_ctx->server = server;
1633 proto_ctx->context = (void *)fd;
1634 silc_socket_host_lookup(newsocket, TRUE,
1635 silc_server_accept_new_connection_lookup,
1636 (void *)proto_ctx, server->schedule);
1639 /* Second part of accepting new connection. Key exchange protocol has been
1640 performed and now it is time to do little connection authentication
1641 protocol to figure out whether this connection is client or server
1642 and whether it has right to access this server (especially server
1643 connections needs to be authenticated). */
1645 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1647 SilcProtocol protocol = (SilcProtocol)context;
1648 SilcServerKEInternalContext *ctx =
1649 (SilcServerKEInternalContext *)protocol->context;
1650 SilcServer server = (SilcServer)ctx->server;
1651 SilcSocketConnection sock = ctx->sock;
1652 SilcServerConnAuthInternalContext *proto_ctx;
1654 SILC_LOG_DEBUG(("Start"));
1656 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1657 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1658 /* Error occured during protocol */
1659 SILC_LOG_DEBUG(("Error key exchange protocol"));
1660 silc_protocol_free(protocol);
1661 sock->protocol = NULL;
1662 silc_ske_free_key_material(ctx->keymat);
1664 silc_packet_context_free(ctx->packet);
1666 silc_ske_free(ctx->ske);
1667 silc_free(ctx->dest_id);
1668 silc_server_config_unref(&ctx->cconfig);
1669 silc_server_config_unref(&ctx->sconfig);
1670 silc_server_config_unref(&ctx->rconfig);
1672 silc_schedule_task_del_by_callback(server->schedule,
1673 silc_server_failure_callback);
1674 silc_server_disconnect_remote(server, sock,
1675 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1677 server->stat.auth_failures++;
1681 /* We now have the key material as the result of the key exchange
1682 protocol. Take the key material into use. Free the raw key material
1683 as soon as we've set them into use. */
1684 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1685 ctx->sock, ctx->keymat,
1686 ctx->ske->prop->cipher,
1687 ctx->ske->prop->pkcs,
1688 ctx->ske->prop->hash,
1689 ctx->ske->prop->hmac,
1690 ctx->ske->prop->group,
1692 SILC_LOG_ERROR(("Error setting key material in use"));
1693 silc_protocol_free(protocol);
1694 sock->protocol = NULL;
1695 silc_ske_free_key_material(ctx->keymat);
1697 silc_packet_context_free(ctx->packet);
1699 silc_ske_free(ctx->ske);
1700 silc_free(ctx->dest_id);
1701 silc_server_config_unref(&ctx->cconfig);
1702 silc_server_config_unref(&ctx->sconfig);
1703 silc_server_config_unref(&ctx->rconfig);
1705 silc_schedule_task_del_by_callback(server->schedule,
1706 silc_server_failure_callback);
1707 silc_server_disconnect_remote(server, sock,
1708 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1709 server->stat.auth_failures++;
1712 silc_ske_free_key_material(ctx->keymat);
1714 /* Allocate internal context for the authentication protocol. This
1715 is sent as context for the protocol. */
1716 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1717 proto_ctx->server = (void *)server;
1718 proto_ctx->sock = sock;
1719 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1720 proto_ctx->responder = TRUE;
1721 proto_ctx->dest_id_type = ctx->dest_id_type;
1722 proto_ctx->dest_id = ctx->dest_id;
1723 proto_ctx->cconfig = ctx->cconfig;
1724 proto_ctx->sconfig = ctx->sconfig;
1725 proto_ctx->rconfig = ctx->rconfig;
1727 /* Free old protocol as it is finished now */
1728 silc_protocol_free(protocol);
1730 silc_packet_context_free(ctx->packet);
1732 sock->protocol = NULL;
1734 /* Allocate the authentication protocol. This is allocated here
1735 but we won't start it yet. We will be receiving party of this
1736 protocol thus we will wait that connecting party will make
1737 their first move. */
1738 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1739 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1740 &sock->protocol, proto_ctx,
1741 silc_server_accept_new_connection_final);
1743 /* Register timeout task. If the protocol is not executed inside
1744 this timelimit the connection will be terminated. */
1745 proto_ctx->timeout_task =
1746 silc_schedule_task_add(server->schedule, sock->sock,
1747 silc_server_timeout_remote,
1749 server->config->conn_auth_timeout, 0,
1754 /* After this is called, server don't wait for backup router anymore.
1755 This gets called automatically even after we have backup router
1756 connection established. */
1758 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1760 SilcServer server = context;
1761 server->wait_backup = FALSE;
1764 /* Final part of accepting new connection. The connection has now
1765 been authenticated and keys has been exchanged. We also know whether
1766 this is client or server connection. */
1768 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1770 SilcProtocol protocol = (SilcProtocol)context;
1771 SilcServerConnAuthInternalContext *ctx =
1772 (SilcServerConnAuthInternalContext *)protocol->context;
1773 SilcServer server = (SilcServer)ctx->server;
1774 SilcSocketConnection sock = ctx->sock;
1775 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1777 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1779 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1780 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1781 /* Error occured during protocol */
1782 SILC_LOG_DEBUG(("Error during authentication protocol"));
1783 silc_protocol_free(protocol);
1784 sock->protocol = NULL;
1786 silc_packet_context_free(ctx->packet);
1788 silc_ske_free(ctx->ske);
1789 silc_free(ctx->dest_id);
1790 silc_server_config_unref(&ctx->cconfig);
1791 silc_server_config_unref(&ctx->sconfig);
1792 silc_server_config_unref(&ctx->rconfig);
1794 silc_schedule_task_del_by_callback(server->schedule,
1795 silc_server_failure_callback);
1796 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1798 server->stat.auth_failures++;
1802 entry->data.last_receive = time(NULL);
1804 switch (ctx->conn_type) {
1805 case SILC_SOCKET_TYPE_CLIENT:
1807 SilcClientEntry client;
1808 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1810 /* Verify whether this connection is after all allowed to connect */
1811 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1812 &server->config->param,
1813 conn->param, ctx->ske)) {
1814 server->stat.auth_failures++;
1818 /* If we are primary router and we have backup router configured
1819 but it has not connected to use yet, do not accept any other
1821 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1822 !server->backup_router) {
1823 SilcServerConfigRouter *router;
1824 router = silc_server_config_get_backup_router(server);
1825 if (router && strcmp(server->config->server_info->primary->server_ip,
1827 silc_server_find_socket_by_host(server,
1828 SILC_SOCKET_TYPE_SERVER,
1829 router->backup_replace_ip, 0)) {
1830 SILC_LOG_INFO(("Will not accept connections because we do "
1831 "not have backup router connection established"));
1832 silc_server_disconnect_remote(server, sock,
1833 SILC_STATUS_ERR_PERM_DENIED,
1834 "We do not have connection to backup "
1835 "router established, try later");
1836 silc_free(sock->user_data);
1837 server->stat.auth_failures++;
1839 /* From here on, wait 10 seconds for the backup router to appear. */
1840 silc_schedule_task_add(server->schedule, 0,
1841 silc_server_backup_router_wait,
1842 (void *)server, 10, 0,
1843 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1848 SILC_LOG_DEBUG(("Remote host is client"));
1849 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1852 /* Add the client to the client ID cache. The nickname and Client ID
1853 and other information is created after we have received NEW_CLIENT
1854 packet from client. */
1855 client = silc_idlist_add_client(server->local_list,
1856 NULL, NULL, NULL, NULL, NULL, sock, 0);
1858 SILC_LOG_ERROR(("Could not add new client to cache"));
1859 silc_free(sock->user_data);
1860 silc_server_disconnect_remote(server, sock,
1861 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1862 server->stat.auth_failures++;
1865 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1868 server->stat.my_clients++;
1869 server->stat.clients++;
1870 server->stat.cell_clients++;
1872 /* Get connection parameters */
1874 if (conn->param->keepalive_secs)
1875 hearbeat_timeout = conn->param->keepalive_secs;
1877 /* Check if to be anonymous connection */
1878 if (conn->param->anonymous)
1879 client->mode |= SILC_UMODE_ANONYMOUS;
1882 id_entry = (void *)client;
1885 case SILC_SOCKET_TYPE_SERVER:
1886 case SILC_SOCKET_TYPE_ROUTER:
1888 SilcServerEntry new_server;
1889 bool initiator = FALSE;
1890 bool backup_local = FALSE;
1891 bool backup_router = FALSE;
1892 char *backup_replace_ip = NULL;
1893 SilcUInt16 backup_replace_port = 0;
1894 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1895 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1897 /* If we are backup router and this is incoming server connection
1898 and we do not have connection to primary router, do not allow
1900 if (server->server_type == SILC_BACKUP_ROUTER &&
1901 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1902 !SILC_PRIMARY_ROUTE(server)) {
1903 SILC_LOG_INFO(("Will not accept server connection because we do "
1904 "not have primary router connection established"));
1905 silc_server_disconnect_remote(server, sock,
1906 SILC_STATUS_ERR_PERM_DENIED,
1907 "We do not have connection to primary "
1908 "router established, try later");
1909 silc_free(sock->user_data);
1910 server->stat.auth_failures++;
1914 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1915 /* Verify whether this connection is after all allowed to connect */
1916 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1917 &server->config->param,
1918 rconn ? rconn->param : NULL,
1920 silc_free(sock->user_data);
1921 server->stat.auth_failures++;
1927 if (rconn->param->keepalive_secs)
1928 hearbeat_timeout = rconn->param->keepalive_secs;
1931 initiator = rconn->initiator;
1932 backup_local = rconn->backup_local;
1933 backup_router = rconn->backup_router;
1934 backup_replace_ip = rconn->backup_replace_ip;
1935 backup_replace_port = rconn->backup_replace_port;
1939 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1940 /* Verify whether this connection is after all allowed to connect */
1941 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1942 &server->config->param,
1943 sconn ? sconn->param : NULL,
1945 silc_free(sock->user_data);
1946 server->stat.auth_failures++;
1951 if (sconn->param->keepalive_secs)
1952 hearbeat_timeout = sconn->param->keepalive_secs;
1955 backup_router = sconn->backup_router;
1959 /* If we are primary router and we have backup router configured
1960 but it has not connected to use yet, do not accept any other
1962 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1963 !server->backup_router && !backup_router) {
1964 SilcServerConfigRouter *router;
1965 router = silc_server_config_get_backup_router(server);
1966 if (router && strcmp(server->config->server_info->primary->server_ip,
1968 silc_server_find_socket_by_host(server,
1969 SILC_SOCKET_TYPE_SERVER,
1970 router->backup_replace_ip, 0)) {
1971 SILC_LOG_INFO(("Will not accept connections because we do "
1972 "not have backup router connection established"));
1973 silc_server_disconnect_remote(server, sock,
1974 SILC_STATUS_ERR_PERM_DENIED,
1975 "We do not have connection to backup "
1976 "router established, try later");
1977 silc_free(sock->user_data);
1978 server->stat.auth_failures++;
1980 /* From here on, wait 10 seconds for the backup router to appear. */
1981 silc_schedule_task_add(server->schedule, 0,
1982 silc_server_backup_router_wait,
1983 (void *)server, 10, 0,
1984 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1989 SILC_LOG_DEBUG(("Remote host is %s",
1990 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1991 "server" : (backup_router ?
1992 "backup router" : "router")));
1993 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1994 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1995 "server" : (backup_router ?
1996 "backup router" : "router")));
1998 /* Add the server into server cache. The server name and Server ID
1999 is updated after we have received NEW_SERVER packet from the
2000 server. We mark ourselves as router for this server if we really
2003 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2004 server->local_list : (backup_router ?
2005 server->local_list :
2006 server->global_list)),
2008 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2009 SILC_SERVER : SILC_ROUTER),
2011 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2012 server->id_entry : (backup_router ?
2013 server->id_entry : NULL)),
2016 SILC_LOG_ERROR(("Could not add new server to cache"));
2017 silc_free(sock->user_data);
2018 silc_server_disconnect_remote(server, sock,
2019 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2020 server->stat.auth_failures++;
2023 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2025 id_entry = (void *)new_server;
2027 /* If the incoming connection is router and marked as backup router
2028 then add it to be one of our backups */
2029 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2030 /* Change it back to SERVER type since that's what it really is. */
2032 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2033 new_server->server_type = SILC_BACKUP_ROUTER;
2035 /* Remove the backup waiting with timeout */
2036 silc_schedule_task_add(server->schedule, 0,
2037 silc_server_backup_router_wait,
2038 (void *)server, 5, 0,
2039 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2043 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2044 server->stat.my_servers++;
2046 server->stat.my_routers++;
2047 server->stat.routers++;
2049 server->stat.servers++;
2051 /* Check whether this connection is to be our primary router connection
2052 if we do not already have the primary route. */
2053 if (!backup_router &&
2054 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2055 if (silc_server_config_is_primary_route(server) && !initiator)
2058 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2059 server->standalone = FALSE;
2060 if (!server->id_entry->router) {
2061 server->id_entry->router = id_entry;
2062 server->router = id_entry;
2073 sock->type = ctx->conn_type;
2075 /* Add the common data structure to the ID entry. */
2076 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2078 /* Add to sockets internal pointer for fast referencing */
2079 silc_free(sock->user_data);
2080 sock->user_data = id_entry;
2082 /* Connection has been fully established now. Everything is ok. */
2083 SILC_LOG_DEBUG(("New connection authenticated"));
2085 /* Perform keepalive. The `hb_context' will be freed automatically
2086 when finally calling the silc_socket_free function. */
2087 silc_socket_set_heartbeat(sock, hearbeat_timeout, server,
2088 silc_server_perform_heartbeat,
2092 silc_schedule_task_del_by_callback(server->schedule,
2093 silc_server_failure_callback);
2094 silc_protocol_free(protocol);
2096 silc_packet_context_free(ctx->packet);
2098 silc_ske_free(ctx->ske);
2099 silc_free(ctx->dest_id);
2100 silc_server_config_unref(&ctx->cconfig);
2101 silc_server_config_unref(&ctx->sconfig);
2102 silc_server_config_unref(&ctx->rconfig);
2104 sock->protocol = NULL;
2107 /* This function is used to read packets from network and send packets to
2108 network. This is usually a generic task. */
2110 SILC_TASK_CALLBACK(silc_server_packet_process)
2112 SilcServer server = (SilcServer)context;
2113 SilcSocketConnection sock = server->sockets[fd];
2114 SilcIDListData idata;
2115 SilcCipher cipher = NULL;
2116 SilcHmac hmac = NULL;
2117 SilcUInt32 sequence = 0;
2121 SILC_LOG_DEBUG(("Unknown socket connection"));
2125 /* Packet sending */
2127 if (type == SILC_TASK_WRITE) {
2128 /* Do not send data to disconnected connection */
2129 if (SILC_IS_DISCONNECTED(sock)) {
2130 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2134 server->stat.packets_sent++;
2136 /* Send the packet */
2137 ret = silc_packet_send(sock, TRUE);
2139 /* If returned -2 could not write to connection now, will do
2145 SILC_LOG_ERROR(("Error sending packet to connection "
2146 "%s:%d [%s]", sock->hostname, sock->port,
2147 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2148 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2149 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2154 /* The packet has been sent and now it is time to set the connection
2155 back to only for input. When there is again some outgoing data
2156 available for this connection it will be set for output as well.
2157 This call clears the output setting and sets it only for input. */
2158 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2159 SILC_UNSET_OUTBUF_PENDING(sock);
2161 silc_buffer_clear(sock->outbuf);
2165 /* Packet receiving */
2167 /* Read some data from connection */
2168 ret = silc_packet_receive(sock);
2172 SILC_LOG_ERROR(("Error receiving packet from connection "
2173 "%s:%d [%s] %s", sock->hostname, sock->port,
2174 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2175 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2176 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2177 "Router"), strerror(errno)));
2183 SILC_LOG_DEBUG(("Read EOF"));
2185 /* If connection is disconnecting already we will finally
2186 close the connection */
2187 if (SILC_IS_DISCONNECTING(sock)) {
2188 if (sock->user_data)
2189 silc_server_free_sock_user_data(server, sock, NULL);
2190 silc_server_close_connection(server, sock);
2194 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2195 SILC_SET_DISCONNECTING(sock);
2197 if (sock->user_data) {
2199 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2200 silc_server_free_sock_user_data(server, sock, tmp);
2202 silc_server_free_sock_user_data(server, sock, NULL);
2203 } else if (server->router_conn && server->router_conn->sock == sock &&
2204 !server->router && server->standalone)
2205 silc_schedule_task_add(server->schedule, 0,
2206 silc_server_connect_to_router,
2209 SILC_TASK_PRI_NORMAL);
2211 silc_server_close_connection(server, sock);
2215 /* If connection is disconnecting or disconnected we will ignore
2217 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2218 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2222 /* Get keys and stuff from ID entry */
2223 idata = (SilcIDListData)sock->user_data;
2225 cipher = idata->receive_key;
2226 hmac = idata->hmac_receive;
2227 sequence = idata->psn_receive;
2230 /* Process the packet. This will call the parser that will then
2231 decrypt and parse the packet. */
2232 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2233 TRUE : FALSE, cipher, hmac, sequence,
2234 silc_server_packet_parse, server);
2236 /* If this socket connection is not authenticated yet and the packet
2237 processing failed we will drop the connection since it can be
2238 a malicious flooder. */
2239 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2240 (!sock->protocol || sock->protocol->protocol->type ==
2241 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2242 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2243 SILC_SET_DISCONNECTING(sock);
2245 if (sock->user_data)
2246 silc_server_free_sock_user_data(server, sock, NULL);
2247 silc_server_close_connection(server, sock);
2251 /* Parses whole packet, received earlier. */
2253 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2255 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2256 SilcServer server = (SilcServer)parse_ctx->context;
2257 SilcSocketConnection sock = parse_ctx->sock;
2258 SilcPacketContext *packet = parse_ctx->packet;
2259 SilcIDListData idata = (SilcIDListData)sock->user_data;
2262 server->stat.packets_received++;
2264 /* Parse the packet */
2265 if (parse_ctx->normal)
2266 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2268 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2270 /* If entry is disabled ignore what we got. */
2271 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2272 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2273 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2274 SILC_LOG_DEBUG(("Connection is disabled"));
2278 if (ret == SILC_PACKET_NONE) {
2279 SILC_LOG_DEBUG(("Error parsing packet"));
2283 /* Check that the the current client ID is same as in the client's packet. */
2284 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2285 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2286 if (client && client->id && packet->src_id) {
2287 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2288 packet->src_id_type);
2289 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2291 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2298 if (server->server_type == SILC_ROUTER) {
2299 /* Route the packet if it is not destined to us. Other ID types but
2300 server are handled separately after processing them. */
2301 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2302 packet->dst_id_type == SILC_ID_SERVER &&
2303 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2304 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2306 /* Route the packet to fastest route for the destination ID */
2307 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2308 packet->dst_id_type);
2311 silc_server_packet_route(server,
2312 silc_server_route_get(server, id,
2313 packet->dst_id_type),
2320 /* Parse the incoming packet type */
2321 silc_server_packet_parse_type(server, sock, packet);
2323 /* Broadcast packet if it is marked as broadcast packet and it is
2324 originated from router and we are router. */
2325 if (server->server_type == SILC_ROUTER &&
2326 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2327 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2328 /* Broadcast to our primary route */
2329 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2331 /* If we have backup routers then we need to feed all broadcast
2332 data to those servers. */
2333 silc_server_backup_broadcast(server, sock, packet);
2337 silc_packet_context_free(packet);
2338 silc_free(parse_ctx);
2341 /* Parser callback called by silc_packet_receive_process. This merely
2342 registers timeout that will handle the actual parsing when appropriate. */
2344 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2347 SilcServer server = (SilcServer)context;
2348 SilcSocketConnection sock = parser_context->sock;
2349 SilcIDListData idata = (SilcIDListData)sock->user_data;
2352 idata->psn_receive = parser_context->packet->sequence + 1;
2354 /* If protocol for this connection is key exchange or rekey then we'll
2355 process all packets synchronously, since there might be packets in
2356 queue that we are not able to decrypt without first processing the
2357 packets before them. */
2358 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2359 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2360 (sock->protocol && sock->protocol->protocol &&
2361 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2362 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2363 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2366 /* Reprocess data since we'll return FALSE here. This is because
2367 the idata->receive_key might have become valid in the last packet
2368 and we want to call this processor with valid cipher. */
2370 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2371 TRUE : FALSE, idata->receive_key,
2372 idata->hmac_receive, idata->psn_receive,
2373 silc_server_packet_parse, server);
2375 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2376 TRUE : FALSE, NULL, NULL, 0,
2377 silc_server_packet_parse, server);
2381 switch (sock->type) {
2382 case SILC_SOCKET_TYPE_UNKNOWN:
2383 case SILC_SOCKET_TYPE_CLIENT:
2384 /* Parse the packet with timeout */
2385 silc_schedule_task_add(server->schedule, sock->sock,
2386 silc_server_packet_parse_real,
2387 (void *)parser_context, 0, 100000,
2389 SILC_TASK_PRI_NORMAL);
2391 case SILC_SOCKET_TYPE_SERVER:
2392 case SILC_SOCKET_TYPE_ROUTER:
2393 /* Packets from servers are parsed immediately */
2394 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2404 /* Parses the packet type and calls what ever routines the packet type
2405 requires. This is done for all incoming packets. */
2407 void silc_server_packet_parse_type(SilcServer server,
2408 SilcSocketConnection sock,
2409 SilcPacketContext *packet)
2411 SilcPacketType type = packet->type;
2412 SilcIDListData idata = (SilcIDListData)sock->user_data;
2414 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2415 silc_get_packet_name(type), packet->flags));
2417 /* Parse the packet type */
2419 case SILC_PACKET_DISCONNECT:
2422 char *message = NULL;
2424 if (packet->flags & SILC_PACKET_FLAG_LIST)
2426 if (packet->buffer->len < 1)
2429 status = (SilcStatus)packet->buffer->data[0];
2430 if (packet->buffer->len > 1 &&
2431 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2432 message = silc_memdup(packet->buffer->data + 1,
2433 packet->buffer->len - 1);
2435 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2436 sock->ip, sock->hostname,
2437 silc_get_status_message(status), status,
2438 message ? message : ""));
2441 /* Handle the disconnection from our end too */
2442 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2443 silc_server_free_sock_user_data(server, sock, NULL);
2444 silc_server_close_connection(server, sock);
2448 case SILC_PACKET_SUCCESS:
2450 * Success received for something. For now we can have only
2451 * one protocol for connection executing at once hence this
2452 * success message is for whatever protocol is executing currently.
2454 if (packet->flags & SILC_PACKET_FLAG_LIST)
2457 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2460 case SILC_PACKET_FAILURE:
2462 * Failure received for something. For now we can have only
2463 * one protocol for connection executing at once hence this
2464 * failure message is for whatever protocol is executing currently.
2466 if (packet->flags & SILC_PACKET_FLAG_LIST)
2468 if (sock->protocol) {
2469 SilcServerFailureContext f;
2470 f = silc_calloc(1, sizeof(*f));
2471 f->sock = silc_socket_dup(sock);
2473 /* We will wait 5 seconds to process this failure packet */
2474 silc_schedule_task_add(server->schedule, sock->sock,
2475 silc_server_failure_callback, (void *)f, 5, 0,
2476 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2480 case SILC_PACKET_REJECT:
2481 if (packet->flags & SILC_PACKET_FLAG_LIST)
2486 case SILC_PACKET_NOTIFY:
2488 * Received notify packet. Server can receive notify packets from
2489 * router. Server then relays the notify messages to clients if needed.
2491 if (packet->flags & SILC_PACKET_FLAG_LIST)
2492 silc_server_notify_list(server, sock, packet);
2494 silc_server_notify(server, sock, packet);
2500 case SILC_PACKET_CHANNEL_MESSAGE:
2502 * Received channel message. Channel messages are special packets
2503 * (although probably most common ones) thus they are handled
2506 if (packet->flags & SILC_PACKET_FLAG_LIST)
2508 idata->last_receive = time(NULL);
2509 silc_server_channel_message(server, sock, packet);
2512 case SILC_PACKET_CHANNEL_KEY:
2514 * Received key for channel. As channels are created by the router
2515 * the keys are as well. We will distribute the key to all of our
2516 * locally connected clients on the particular channel. Router
2517 * never receives this channel and thus is ignored.
2519 if (packet->flags & SILC_PACKET_FLAG_LIST)
2521 silc_server_channel_key(server, sock, packet);
2527 case SILC_PACKET_COMMAND:
2529 * Recived command. Processes the command request and allocates the
2530 * command context and calls the command.
2532 if (packet->flags & SILC_PACKET_FLAG_LIST)
2534 silc_server_command_process(server, sock, packet);
2537 case SILC_PACKET_COMMAND_REPLY:
2539 * Received command reply packet. Received command reply to command. It
2540 * may be reply to command sent by us or reply to command sent by client
2541 * that we've routed further.
2543 if (packet->flags & SILC_PACKET_FLAG_LIST)
2545 silc_server_command_reply(server, sock, packet);
2549 * Private Message packets
2551 case SILC_PACKET_PRIVATE_MESSAGE:
2553 * Received private message packet. The packet is coming from either
2556 if (packet->flags & SILC_PACKET_FLAG_LIST)
2558 idata->last_receive = time(NULL);
2559 silc_server_private_message(server, sock, packet);
2562 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2564 * Private message key packet.
2566 if (packet->flags & SILC_PACKET_FLAG_LIST)
2568 silc_server_private_message_key(server, sock, packet);
2572 * Key Exchange protocol packets
2574 case SILC_PACKET_KEY_EXCHANGE:
2575 if (packet->flags & SILC_PACKET_FLAG_LIST)
2578 if (sock->protocol && sock->protocol->protocol &&
2579 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2580 SilcServerKEInternalContext *proto_ctx =
2581 (SilcServerKEInternalContext *)sock->protocol->context;
2583 proto_ctx->packet = silc_packet_context_dup(packet);
2585 /* Let the protocol handle the packet */
2586 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2588 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2589 "protocol active, packet dropped."));
2593 case SILC_PACKET_KEY_EXCHANGE_1:
2594 if (packet->flags & SILC_PACKET_FLAG_LIST)
2597 if (sock->protocol && sock->protocol->protocol &&
2598 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2599 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2601 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2602 SilcServerRekeyInternalContext *proto_ctx =
2603 (SilcServerRekeyInternalContext *)sock->protocol->context;
2605 if (proto_ctx->packet)
2606 silc_packet_context_free(proto_ctx->packet);
2608 proto_ctx->packet = silc_packet_context_dup(packet);
2610 /* Let the protocol handle the packet */
2611 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2613 SilcServerKEInternalContext *proto_ctx =
2614 (SilcServerKEInternalContext *)sock->protocol->context;
2616 if (proto_ctx->packet)
2617 silc_packet_context_free(proto_ctx->packet);
2619 proto_ctx->packet = silc_packet_context_dup(packet);
2620 proto_ctx->dest_id_type = packet->src_id_type;
2621 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2622 packet->src_id_type);
2623 if (!proto_ctx->dest_id)
2626 /* Let the protocol handle the packet */
2627 silc_protocol_execute(sock->protocol, server->schedule,
2631 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2632 "protocol active, packet dropped."));
2636 case SILC_PACKET_KEY_EXCHANGE_2:
2637 if (packet->flags & SILC_PACKET_FLAG_LIST)
2640 if (sock->protocol && sock->protocol->protocol &&
2641 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2642 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2644 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2645 SilcServerRekeyInternalContext *proto_ctx =
2646 (SilcServerRekeyInternalContext *)sock->protocol->context;
2648 if (proto_ctx->packet)
2649 silc_packet_context_free(proto_ctx->packet);
2651 proto_ctx->packet = silc_packet_context_dup(packet);
2653 /* Let the protocol handle the packet */
2654 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2656 SilcServerKEInternalContext *proto_ctx =
2657 (SilcServerKEInternalContext *)sock->protocol->context;
2659 if (proto_ctx->packet)
2660 silc_packet_context_free(proto_ctx->packet);
2662 proto_ctx->packet = silc_packet_context_dup(packet);
2663 proto_ctx->dest_id_type = packet->src_id_type;
2664 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2665 packet->src_id_type);
2666 if (!proto_ctx->dest_id)
2669 /* Let the protocol handle the packet */
2670 silc_protocol_execute(sock->protocol, server->schedule,
2674 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2675 "protocol active, packet dropped."));
2679 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2681 * Connection authentication request packet. When we receive this packet
2682 * we will send to the other end information about our mandatory
2683 * authentication method for the connection. This packet maybe received
2686 if (packet->flags & SILC_PACKET_FLAG_LIST)
2688 silc_server_connection_auth_request(server, sock, packet);
2692 * Connection Authentication protocol packets
2694 case SILC_PACKET_CONNECTION_AUTH:
2695 /* Start of the authentication protocol. We receive here the
2696 authentication data and will verify it. */
2697 if (packet->flags & SILC_PACKET_FLAG_LIST)
2700 if (sock->protocol && sock->protocol->protocol->type
2701 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2703 SilcServerConnAuthInternalContext *proto_ctx =
2704 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2706 proto_ctx->packet = silc_packet_context_dup(packet);
2708 /* Let the protocol handle the packet */
2709 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2711 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2712 "protocol active, packet dropped."));
2716 case SILC_PACKET_NEW_ID:
2718 * Received New ID packet. This includes some new ID that has been
2719 * created. It may be for client, server or channel. This is the way
2720 * to distribute information about new registered entities in the
2723 if (packet->flags & SILC_PACKET_FLAG_LIST)
2724 silc_server_new_id_list(server, sock, packet);
2726 silc_server_new_id(server, sock, packet);
2729 case SILC_PACKET_NEW_CLIENT:
2731 * Received new client packet. This includes client information that
2732 * we will use to create initial client ID. After creating new
2733 * ID we will send it to the client.
2735 if (packet->flags & SILC_PACKET_FLAG_LIST)
2737 silc_server_new_client(server, sock, packet);
2740 case SILC_PACKET_NEW_SERVER:
2742 * Received new server packet. This includes Server ID and some other
2743 * information that we may save. This is received after server has
2746 if (packet->flags & SILC_PACKET_FLAG_LIST)
2748 silc_server_new_server(server, sock, packet);
2751 case SILC_PACKET_NEW_CHANNEL:
2753 * Received new channel packet. Information about new channel in the
2754 * network are distributed using this packet.
2756 if (packet->flags & SILC_PACKET_FLAG_LIST)
2757 silc_server_new_channel_list(server, sock, packet);
2759 silc_server_new_channel(server, sock, packet);
2762 case SILC_PACKET_HEARTBEAT:
2764 * Received heartbeat.
2766 if (packet->flags & SILC_PACKET_FLAG_LIST)
2770 case SILC_PACKET_KEY_AGREEMENT:
2772 * Received heartbeat.
2774 if (packet->flags & SILC_PACKET_FLAG_LIST)
2776 silc_server_key_agreement(server, sock, packet);
2779 case SILC_PACKET_REKEY:
2781 * Received re-key packet. The sender wants to regenerate the session
2784 if (packet->flags & SILC_PACKET_FLAG_LIST)
2786 silc_server_rekey(server, sock, packet);
2789 case SILC_PACKET_REKEY_DONE:
2791 * The re-key is done.
2793 if (packet->flags & SILC_PACKET_FLAG_LIST)
2796 if (sock->protocol && sock->protocol->protocol &&
2797 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2799 SilcServerRekeyInternalContext *proto_ctx =
2800 (SilcServerRekeyInternalContext *)sock->protocol->context;
2802 if (proto_ctx->packet)
2803 silc_packet_context_free(proto_ctx->packet);
2805 proto_ctx->packet = silc_packet_context_dup(packet);
2807 /* Let the protocol handle the packet */
2808 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2810 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2811 "protocol active, packet dropped."));
2815 case SILC_PACKET_FTP:
2817 if (packet->flags & SILC_PACKET_FLAG_LIST)
2819 silc_server_ftp(server, sock, packet);
2822 case SILC_PACKET_RESUME_CLIENT:
2824 if (packet->flags & SILC_PACKET_FLAG_LIST)
2826 silc_server_resume_client(server, sock, packet);
2829 case SILC_PACKET_RESUME_ROUTER:
2830 /* Resume router packet received. This packet is received for backup
2831 router resuming protocol. */
2832 if (packet->flags & SILC_PACKET_FLAG_LIST)
2834 silc_server_backup_resume_router(server, sock, packet);
2838 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2843 /* Creates connection to a remote router. */
2845 void silc_server_create_connection(SilcServer server,
2846 const char *remote_host, SilcUInt32 port)
2848 SilcServerConnection sconn;
2850 /* Allocate connection object for hold connection specific stuff. */
2851 sconn = silc_calloc(1, sizeof(*sconn));
2852 sconn->remote_host = strdup(remote_host);
2853 sconn->remote_port = port;
2854 sconn->no_reconnect = TRUE;
2856 silc_schedule_task_add(server->schedule, 0,
2857 silc_server_connect_router,
2858 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2859 SILC_TASK_PRI_NORMAL);
2862 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2864 silc_socket_free(context);
2867 /* Closes connection to socket connection */
2869 void silc_server_close_connection(SilcServer server,
2870 SilcSocketConnection sock)
2874 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2875 silc_schedule_task_add(server->schedule, 0,
2876 silc_server_close_connection_final,
2877 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2878 SILC_TASK_PRI_NORMAL);
2882 memset(tmp, 0, sizeof(tmp));
2883 silc_socket_get_error(sock, tmp, sizeof(tmp));
2884 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2886 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2887 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2888 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2889 "Router"), tmp[0] ? tmp : ""));
2891 /* We won't listen for this connection anymore */
2892 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2894 /* Unregister all tasks */
2895 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2897 /* Close the actual connection */
2898 silc_net_close_connection(sock->sock);
2899 server->sockets[sock->sock] = NULL;
2901 /* If sock->user_data is NULL then we'll check for active protocols
2902 here since the silc_server_free_sock_user_data has not been called
2903 for this connection. */
2904 if (!sock->user_data) {
2905 /* If any protocol is active cancel its execution. It will call
2906 the final callback which will finalize the disconnection. */
2907 if (sock->protocol) {
2908 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2909 silc_protocol_cancel(sock->protocol, server->schedule);
2910 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2911 silc_protocol_execute_final(sock->protocol, server->schedule);
2912 sock->protocol = NULL;
2917 silc_schedule_task_add(server->schedule, 0,
2918 silc_server_close_connection_final,
2919 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2920 SILC_TASK_PRI_NORMAL);
2923 /* Sends disconnect message to remote connection and disconnects the
2926 void silc_server_disconnect_remote(SilcServer server,
2927 SilcSocketConnection sock,
2928 SilcStatus status, ...)
2931 unsigned char buf[512];
2939 memset(buf, 0, sizeof(buf));
2940 va_start(ap, status);
2941 cp = va_arg(ap, char *);
2943 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2948 SILC_LOG_DEBUG(("Disconnecting remote host"));
2950 /* Notify remote end that the conversation is over. The notify message
2951 is tried to be sent immediately. */
2955 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2957 buffer = silc_buffer_alloc_size(len);
2961 buffer->data[0] = status;
2963 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2965 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2966 buffer->data, buffer->len, TRUE);
2967 silc_buffer_free(buffer);
2970 silc_server_packet_queue_purge(server, sock);
2972 /* Mark the connection to be disconnected */
2973 SILC_SET_DISCONNECTED(sock);
2974 silc_server_close_connection(server, sock);
2977 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2979 SilcServer server = app_context;
2980 SilcClientEntry client = context;
2982 assert(!silc_hash_table_count(client->channels));
2984 silc_idlist_del_data(client);
2985 silc_idcache_purge_by_context(server->local_list->clients, client);
2988 /* Frees client data and notifies about client's signoff. */
2990 void silc_server_free_client_data(SilcServer server,
2991 SilcSocketConnection sock,
2992 SilcClientEntry client,
2994 const char *signoff)
2996 SILC_LOG_DEBUG(("Freeing client data"));
2998 /* If there is pending outgoing data for the client then purge it
2999 to the network before removing the client entry. */
3000 silc_server_packet_queue_purge(server, sock);
3003 /* Check if anyone is watching this nickname */
3004 if (server->server_type == SILC_ROUTER)
3005 silc_server_check_watcher_list(server, client, NULL,
3006 SILC_NOTIFY_TYPE_SIGNOFF);
3008 /* Send SIGNOFF notify to routers. */
3010 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3011 SILC_BROADCAST(server), client->id,
3015 /* Remove client from all channels */
3017 silc_server_remove_from_channels(server, NULL, client,
3018 TRUE, (char *)signoff, TRUE);
3020 silc_server_remove_from_channels(server, NULL, client,
3021 FALSE, NULL, FALSE);
3023 /* Remove this client from watcher list if it is */
3024 silc_server_del_from_watcher_list(server, client);
3026 /* Update statistics */
3027 server->stat.my_clients--;
3028 server->stat.clients--;
3029 if (server->stat.cell_clients)
3030 server->stat.cell_clients--;
3031 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3032 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3033 silc_schedule_task_del_by_context(server->schedule, client);
3035 /* We will not delete the client entry right away. We will take it
3036 into history (for WHOWAS command) for 5 minutes, unless we're
3037 shutting down server. */
3038 if (!server->server_shutdown) {
3039 silc_schedule_task_add(server->schedule, 0,
3040 silc_server_free_client_data_timeout,
3042 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3043 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3044 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3046 client->router = NULL;
3047 client->connection = NULL;
3049 /* Delete directly since we're shutting down server */
3050 silc_idlist_del_data(client);
3051 silc_idlist_del_client(server->local_list, client);
3055 /* Frees user_data pointer from socket connection object. This also sends
3056 appropriate notify packets to the network to inform about leaving
3059 void silc_server_free_sock_user_data(SilcServer server,
3060 SilcSocketConnection sock,
3061 const char *signoff_message)
3063 switch (sock->type) {
3064 case SILC_SOCKET_TYPE_CLIENT:
3066 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3067 silc_server_free_client_data(server, sock, user_data, TRUE,
3071 case SILC_SOCKET_TYPE_SERVER:
3072 case SILC_SOCKET_TYPE_ROUTER:
3074 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3075 SilcServerEntry backup_router = NULL;
3077 SILC_LOG_DEBUG(("Freeing server data"));
3080 backup_router = silc_server_backup_get(server, user_data->id);
3082 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3083 backup_router == server->id_entry &&
3084 sock->type != SILC_SOCKET_TYPE_ROUTER)
3085 backup_router = NULL;
3087 if (server->server_shutdown)
3088 backup_router = NULL;
3090 /* If this was our primary router connection then we're lost to
3091 the outside world. */
3092 if (server->router == user_data) {
3093 /* Check whether we have a backup router connection */
3094 if (!backup_router || backup_router == user_data) {
3095 silc_schedule_task_add(server->schedule, 0,
3096 silc_server_connect_to_router,
3099 SILC_TASK_PRI_NORMAL);
3101 server->id_entry->router = NULL;
3102 server->router = NULL;
3103 server->standalone = TRUE;
3104 backup_router = NULL;
3106 if (server->id_entry != backup_router) {
3107 SILC_LOG_INFO(("New primary router is backup router %s",
3108 backup_router->server_name));
3109 server->id_entry->router = backup_router;
3110 server->router = backup_router;
3111 server->router_connect = time(0);
3112 server->backup_primary = TRUE;
3114 SILC_LOG_INFO(("We are now new primary router in this cell"));
3115 server->id_entry->router = NULL;
3116 server->router = NULL;
3117 server->standalone = TRUE;
3119 /* We stop here to take a breath */
3123 if (server->server_type == SILC_BACKUP_ROUTER) {
3124 server->server_type = SILC_ROUTER;
3126 /* We'll need to constantly try to reconnect to the primary
3127 router so that we'll see when it comes back online. */
3128 silc_server_backup_reconnect(server, sock->ip, sock->port,
3129 silc_server_backup_connected,
3133 /* Mark this connection as replaced */
3134 silc_server_backup_replaced_add(server, user_data->id,
3137 } else if (backup_router) {
3138 SILC_LOG_INFO(("Enabling the use of backup router %s",
3139 backup_router->server_name));
3140 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3141 backup_router->server_name));
3143 /* Mark this connection as replaced */
3144 silc_server_backup_replaced_add(server, user_data->id,
3148 if (!backup_router) {
3149 /* Remove all servers that are originated from this server, and
3150 remove the clients of those servers too. */
3151 silc_server_remove_servers_by_server(server, user_data, TRUE);
3153 /* Remove the clients that this server owns as they will become
3154 invalid now too. For backup router the server is actually
3155 coming from the primary router, so mark that as the owner
3157 if (server->server_type == SILC_BACKUP_ROUTER &&
3158 sock->type == SILC_SOCKET_TYPE_SERVER)
3159 silc_server_remove_clients_by_server(server, server->router,
3162 silc_server_remove_clients_by_server(server, user_data,
3165 /* Remove channels owned by this server */
3166 if (server->server_type == SILC_SERVER)
3167 silc_server_remove_channels_by_server(server, user_data);
3169 /* Enable local server connections that may be disabled */
3170 silc_server_local_servers_toggle_enabled(server, TRUE);
3172 /* Update the client entries of this server to the new backup
3173 router. If we are the backup router we also resolve the real
3174 servers for the clients. After updating is over this also
3175 removes the clients that this server explicitly owns. */
3176 silc_server_update_clients_by_server(server, user_data,
3177 backup_router, TRUE);
3179 /* If we are router and just lost our primary router (now standlaone)
3180 we remove everything that was behind it, since we don't know
3182 if (server->server_type == SILC_ROUTER && server->standalone)
3183 /* Remove all servers that are originated from this server, and
3184 remove the clients of those servers too. */
3185 silc_server_remove_servers_by_server(server, user_data, TRUE);
3187 /* Finally remove the clients that are explicitly owned by this
3188 server. They go down with the server. */
3189 silc_server_remove_clients_by_server(server, user_data,
3192 /* Update our server cache to use the new backup router too. */
3193 silc_server_update_servers_by_server(server, user_data, backup_router);
3194 if (server->server_type == SILC_SERVER)
3195 silc_server_update_channels_by_server(server, user_data,
3198 /* Send notify about primary router going down to local operators */
3199 if (server->backup_router)
3200 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3201 SILC_NOTIFY_TYPE_NONE,
3202 ("%s switched to backup router %s "
3203 "(we are primary router now)",
3204 server->server_name, server->server_name));
3205 else if (server->router)
3206 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3207 SILC_NOTIFY_TYPE_NONE,
3208 ("%s switched to backup router %s",
3209 server->server_name,
3210 server->router->server_name));
3213 /* Free the server entry */
3214 silc_server_backup_del(server, user_data);
3215 silc_server_backup_replaced_del(server, user_data);
3216 silc_idlist_del_data(user_data);
3217 if (!silc_idlist_del_server(server->local_list, user_data))
3218 silc_idlist_del_server(server->global_list, user_data);
3219 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3220 server->stat.my_servers--;
3222 server->stat.my_routers--;
3223 server->stat.routers--;
3225 server->stat.servers--;
3226 if (server->server_type == SILC_ROUTER)
3227 server->stat.cell_servers--;
3229 if (backup_router && backup_router != server->id_entry) {
3230 /* Announce all of our stuff that was created about 5 minutes ago.
3231 The backup router knows all the other stuff already. */
3232 if (server->server_type == SILC_ROUTER)
3233 silc_server_announce_servers(server, FALSE, time(0) - 300,
3234 backup_router->connection);
3236 /* Announce our clients and channels to the router */
3237 silc_server_announce_clients(server, time(0) - 300,
3238 backup_router->connection);
3239 silc_server_announce_channels(server, time(0) - 300,
3240 backup_router->connection);
3246 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3248 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3250 silc_idlist_del_data(user_data);
3251 silc_free(user_data);
3256 /* If any protocol is active cancel its execution */
3257 if (sock->protocol) {
3258 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3259 silc_protocol_cancel(sock->protocol, server->schedule);
3260 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3261 silc_protocol_execute_final(sock->protocol, server->schedule);
3262 sock->protocol = NULL;
3265 sock->user_data = NULL;
3268 /* Removes client from all channels it has joined. This is used when client
3269 connection is disconnected. If the client on a channel is last, the
3270 channel is removed as well. This sends the SIGNOFF notify types. */
3272 void silc_server_remove_from_channels(SilcServer server,
3273 SilcSocketConnection sock,
3274 SilcClientEntry client,
3276 const char *signoff_message,
3279 SilcChannelEntry channel;
3280 SilcChannelClientEntry chl;
3281 SilcHashTableList htl;
3282 SilcBuffer clidp = NULL;
3287 SILC_LOG_DEBUG(("Removing client from joined channels"));
3289 if (notify && !client->id)
3293 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3298 /* Remove the client from all channels. The client is removed from
3299 the channels' user list. */
3300 silc_hash_table_list(client->channels, &htl);
3301 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3302 channel = chl->channel;
3304 /* Remove channel if this is last client leaving the channel, unless
3305 the channel is permanent. */
3306 if (server->server_type != SILC_SERVER &&
3307 silc_hash_table_count(channel->user_list) < 2) {
3308 silc_server_channel_delete(server, channel);
3312 silc_hash_table_del(client->channels, channel);
3313 silc_hash_table_del(channel->user_list, chl->client);
3314 channel->user_count--;
3316 /* If there is no global users on the channel anymore mark the channel
3317 as local channel. Do not check if the removed client is local client. */
3318 if (server->server_type == SILC_SERVER && channel->global_users &&
3319 chl->client->router && !silc_server_channel_has_global(channel))
3320 channel->global_users = FALSE;
3324 /* Update statistics */
3325 if (SILC_IS_LOCAL(client))
3326 server->stat.my_chanclients--;
3327 if (server->server_type == SILC_ROUTER) {
3328 server->stat.cell_chanclients--;
3329 server->stat.chanclients--;
3332 /* If there is not at least one local user on the channel then we don't
3333 need the channel entry anymore, we can remove it safely, unless the
3334 channel is permanent channel */
3335 if (server->server_type == SILC_SERVER &&
3336 !silc_server_channel_has_local(channel)) {
3337 /* Notify about leaving client if this channel has global users. */
3338 if (notify && channel->global_users)
3339 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3340 SILC_NOTIFY_TYPE_SIGNOFF,
3341 signoff_message ? 2 : 1,
3342 clidp->data, clidp->len,
3343 signoff_message, signoff_message ?
3344 strlen(signoff_message) : 0);
3346 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3347 silc_server_channel_delete(server, channel);
3351 /* Send notify to channel about client leaving SILC and channel too */
3353 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3354 SILC_NOTIFY_TYPE_SIGNOFF,
3355 signoff_message ? 2 : 1,
3356 clidp->data, clidp->len,
3357 signoff_message, signoff_message ?
3358 strlen(signoff_message) : 0);
3360 /* Don't create keys if we are shutting down */
3361 if (server->server_shutdown)
3364 /* Re-generate channel key if needed */
3365 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3366 if (!silc_server_create_channel_key(server, channel, 0))
3369 /* Send the channel key to the channel. The key of course is not sent
3370 to the client who was removed from the channel. */
3371 silc_server_send_channel_key(server, client->connection, channel,
3372 server->server_type == SILC_ROUTER ?
3373 FALSE : !server->standalone);
3377 silc_hash_table_list_reset(&htl);
3379 silc_buffer_free(clidp);
3382 /* Removes client from one channel. This is used for example when client
3383 calls LEAVE command to remove itself from the channel. Returns TRUE
3384 if channel still exists and FALSE if the channel is removed when
3385 last client leaves the channel. If `notify' is FALSE notify messages
3388 bool silc_server_remove_from_one_channel(SilcServer server,
3389 SilcSocketConnection sock,
3390 SilcChannelEntry channel,
3391 SilcClientEntry client,
3394 SilcChannelClientEntry chl;
3397 SILC_LOG_DEBUG(("Removing %s from channel %s",
3398 silc_id_render(client->id, SILC_ID_CLIENT),
3399 channel->channel_name));
3401 /* Get the entry to the channel, if this client is not on the channel
3403 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3406 /* Remove channel if this is last client leaving the channel, unless
3407 the channel is permanent. */
3408 if (server->server_type != SILC_SERVER &&
3409 silc_hash_table_count(channel->user_list) < 2) {
3410 silc_server_channel_delete(server, channel);
3414 silc_hash_table_del(client->channels, chl->channel);
3415 silc_hash_table_del(channel->user_list, chl->client);
3416 channel->user_count--;
3418 /* If there is no global users on the channel anymore mark the channel
3419 as local channel. Do not check if the client is local client. */
3420 if (server->server_type == SILC_SERVER && channel->global_users &&
3421 chl->client->router && !silc_server_channel_has_global(channel))
3422 channel->global_users = FALSE;
3426 /* Update statistics */
3427 if (SILC_IS_LOCAL(client))
3428 server->stat.my_chanclients--;
3429 if (server->server_type == SILC_ROUTER) {
3430 server->stat.cell_chanclients--;
3431 server->stat.chanclients--;
3434 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3438 /* If there is not at least one local user on the channel then we don't
3439 need the channel entry anymore, we can remove it safely, unless the
3440 channel is permanent channel */
3441 if (server->server_type == SILC_SERVER &&
3442 !silc_server_channel_has_local(channel)) {
3443 /* Notify about leaving client if this channel has global users. */
3444 if (notify && channel->global_users)
3445 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3446 SILC_NOTIFY_TYPE_LEAVE, 1,
3447 clidp->data, clidp->len);
3449 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3450 silc_server_channel_delete(server, channel);
3451 silc_buffer_free(clidp);
3455 /* Send notify to channel about client leaving the channel */
3457 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3458 SILC_NOTIFY_TYPE_LEAVE, 1,
3459 clidp->data, clidp->len);
3461 silc_buffer_free(clidp);
3465 /* Timeout callback. This is called if connection is idle or for some
3466 other reason is not responding within some period of time. This
3467 disconnects the remote end. */
3469 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3471 SilcServer server = (SilcServer)context;
3472 SilcSocketConnection sock = server->sockets[fd];
3473 SilcProtocolType protocol = 0;
3475 SILC_LOG_DEBUG(("Start"));
3480 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3481 sock->hostname, sock->ip));
3483 /* If we have protocol active we must assure that we call the protocol's
3484 final callback so that all the memory is freed. */
3485 if (sock->protocol) {
3486 protocol = sock->protocol->protocol->type;
3487 silc_protocol_cancel(sock->protocol, server->schedule);
3488 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3489 silc_protocol_execute_final(sock->protocol, server->schedule);
3490 sock->protocol = NULL;
3494 if (sock->user_data)
3495 silc_server_free_sock_user_data(server, sock, NULL);
3497 silc_server_disconnect_remote(server, sock,
3499 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3500 SILC_STATUS_ERR_AUTH_FAILED :
3501 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3502 "Connection timeout");
3505 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3506 function may be used only by router. In real SILC network all channels
3507 are created by routers thus this function is never used by normal
3510 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3511 SilcServerID *router_id,
3517 SilcChannelID *channel_id;
3518 SilcChannelEntry entry;
3522 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3525 cipher = SILC_DEFAULT_CIPHER;
3527 hmac = SILC_DEFAULT_HMAC;
3529 /* Allocate cipher */
3530 if (!silc_cipher_alloc(cipher, &key))
3534 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3535 silc_cipher_free(key);
3539 channel_name = strdup(channel_name);
3541 /* Create the channel ID */
3542 if (!silc_id_create_channel_id(server, router_id, server->rng,
3544 silc_free(channel_name);
3545 silc_cipher_free(key);
3546 silc_hmac_free(newhmac);
3550 /* Create the channel */
3551 entry = silc_idlist_add_channel(server->local_list, channel_name,
3552 SILC_CHANNEL_MODE_NONE, channel_id,
3553 NULL, key, newhmac, 0);
3555 silc_free(channel_name);
3556 silc_cipher_free(key);
3557 silc_hmac_free(newhmac);
3558 silc_free(channel_id);
3562 entry->cipher = strdup(cipher);
3563 entry->hmac_name = strdup(hmac);
3565 /* Now create the actual key material */
3566 if (!silc_server_create_channel_key(server, entry,
3567 silc_cipher_get_key_len(key) / 8)) {
3568 silc_idlist_del_channel(server->local_list, entry);
3572 /* Notify other routers about the new channel. We send the packet
3573 to our primary route. */
3575 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3576 channel_name, entry->id,
3577 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3580 /* Distribute to backup routers */
3581 if (broadcast && server->server_type == SILC_ROUTER) {
3584 SilcUInt32 name_len = strlen(channel_name);
3585 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3586 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3588 packet = silc_channel_payload_encode(channel_name, name_len,
3589 cid, channel_id_len, entry->mode);
3590 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3591 packet->data, packet->len, FALSE, TRUE);
3593 silc_buffer_free(packet);
3596 server->stat.my_channels++;
3597 if (server->server_type == SILC_ROUTER) {
3598 server->stat.channels++;
3599 server->stat.cell_channels++;
3600 entry->users_resolved = TRUE;
3606 /* Same as above but creates the channel with Channel ID `channel_id. */
3609 silc_server_create_new_channel_with_id(SilcServer server,
3613 SilcChannelID *channel_id,
3616 SilcChannelEntry entry;
3620 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3623 cipher = SILC_DEFAULT_CIPHER;
3625 hmac = SILC_DEFAULT_HMAC;
3627 /* Allocate cipher */
3628 if (!silc_cipher_alloc(cipher, &key))
3632 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3633 silc_cipher_free(key);
3637 channel_name = strdup(channel_name);
3639 /* Create the channel */
3640 entry = silc_idlist_add_channel(server->local_list, channel_name,
3641 SILC_CHANNEL_MODE_NONE, channel_id,
3642 NULL, key, newhmac, 0);
3644 silc_cipher_free(key);
3645 silc_hmac_free(newhmac);
3646 silc_free(channel_name);
3650 /* Now create the actual key material */
3651 if (!silc_server_create_channel_key(server, entry,
3652 silc_cipher_get_key_len(key) / 8)) {
3653 silc_idlist_del_channel(server->local_list, entry);
3657 /* Notify other routers about the new channel. We send the packet
3658 to our primary route. */
3660 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3661 channel_name, entry->id,
3662 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3665 /* Distribute to backup routers */
3666 if (broadcast && server->server_type == SILC_ROUTER) {
3669 SilcUInt32 name_len = strlen(channel_name);
3670 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3671 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3673 packet = silc_channel_payload_encode(channel_name, name_len,
3674 cid, channel_id_len, entry->mode);
3675 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3676 packet->data, packet->len, FALSE, TRUE);
3678 silc_buffer_free(packet);
3681 server->stat.my_channels++;
3682 if (server->server_type == SILC_ROUTER) {
3683 server->stat.channels++;
3684 server->stat.cell_channels++;
3685 entry->users_resolved = TRUE;
3691 /* Channel's key re-key timeout callback. */
3693 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3695 SilcServer server = app_context;
3696 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3700 /* Return now if we are shutting down */
3701 if (server->server_shutdown)
3704 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3707 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3710 /* Generates new channel key. This is used to create the initial channel key
3711 but also to re-generate new key for channel. If `key_len' is provided
3712 it is the bytes of the key length. */
3714 bool silc_server_create_channel_key(SilcServer server,
3715 SilcChannelEntry channel,
3719 unsigned char channel_key[32], hash[32];
3722 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3723 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3727 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3729 if (!channel->channel_key)
3730 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3731 channel->channel_key = NULL;
3737 else if (channel->key_len)
3738 len = channel->key_len / 8;
3740 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3742 /* Create channel key */
3743 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3746 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3748 /* Remove old key if exists */
3750 memset(channel->key, 0, channel->key_len / 8);
3751 silc_free(channel->key);
3755 channel->key_len = len * 8;
3756 channel->key = silc_memdup(channel_key, len);
3757 memset(channel_key, 0, sizeof(channel_key));
3759 /* Generate HMAC key from the channel key data and set it */
3761 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3762 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3763 silc_hmac_set_key(channel->hmac, hash,
3764 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3765 memset(hash, 0, sizeof(hash));
3767 if (server->server_type == SILC_ROUTER) {
3768 if (!channel->rekey)
3769 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3770 channel->rekey->channel = channel;
3771 channel->rekey->key_len = key_len;
3772 if (channel->rekey->task)
3773 silc_schedule_task_del(server->schedule, channel->rekey->task);
3775 channel->rekey->task =
3776 silc_schedule_task_add(server->schedule, 0,
3777 silc_server_channel_key_rekey,
3778 (void *)channel->rekey,
3779 server->config->channel_rekey_secs, 0,
3781 SILC_TASK_PRI_NORMAL);
3787 /* Saves the channel key found in the encoded `key_payload' buffer. This
3788 function is used when we receive Channel Key Payload and also when we're
3789 processing JOIN command reply. Returns entry to the channel. */
3791 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3792 SilcBuffer key_payload,
3793 SilcChannelEntry channel)
3795 SilcChannelKeyPayload payload = NULL;
3796 SilcChannelID *id = NULL;
3797 unsigned char *tmp, hash[32];
3801 /* Decode channel key payload */
3802 payload = silc_channel_key_payload_parse(key_payload->data,
3805 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3810 /* Get the channel entry */
3813 /* Get channel ID */
3814 tmp = silc_channel_key_get_id(payload, &tmp_len);
3815 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3821 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3823 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3825 if (server->server_type == SILC_ROUTER)
3826 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3827 silc_id_render(id, SILC_ID_CHANNEL)));
3833 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3835 tmp = silc_channel_key_get_key(payload, &tmp_len);
3841 cipher = silc_channel_key_get_cipher(payload, NULL);
3847 /* Remove old key if exists */
3849 memset(channel->key, 0, channel->key_len / 8);
3850 silc_free(channel->key);
3851 silc_cipher_free(channel->channel_key);
3854 /* Create new cipher */
3855 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3856 channel->channel_key = NULL;
3861 if (channel->cipher)
3862 silc_free(channel->cipher);
3863 channel->cipher = strdup(cipher);
3866 channel->key_len = tmp_len * 8;
3867 channel->key = silc_memdup(tmp, tmp_len);
3868 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3870 /* Generate HMAC key from the channel key data and set it */
3872 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3873 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3874 silc_hmac_set_key(channel->hmac, hash,
3875 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3877 memset(hash, 0, sizeof(hash));
3878 memset(tmp, 0, tmp_len);
3880 if (server->server_type == SILC_ROUTER) {
3881 if (!channel->rekey)
3882 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3883 channel->rekey->channel = channel;
3884 if (channel->rekey->task)
3885 silc_schedule_task_del(server->schedule, channel->rekey->task);
3887 channel->rekey->task =
3888 silc_schedule_task_add(server->schedule, 0,
3889 silc_server_channel_key_rekey,
3890 (void *)channel->rekey,
3891 server->config->channel_rekey_secs, 0,
3893 SILC_TASK_PRI_NORMAL);
3899 silc_channel_key_payload_free(payload);
3904 /* Heartbeat callback. This function is set as argument for the
3905 silc_socket_set_heartbeat function. The library will call this function
3906 at the set time interval. */
3908 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3911 SilcServer server = hb_context;
3913 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3914 sock->port, sock->ip));
3916 /* Send the heartbeat */
3917 silc_server_send_heartbeat(server, sock);
3920 /* Returns assembled of all servers in the given ID list. The packet's
3921 form is dictated by the New ID payload. */
3923 static void silc_server_announce_get_servers(SilcServer server,
3924 SilcServerEntry remote,
3926 SilcBuffer *servers,
3927 unsigned long creation_time)
3929 SilcIDCacheList list;
3930 SilcIDCacheEntry id_cache;
3931 SilcServerEntry entry;
3934 /* Go through all clients in the list */
3935 if (silc_idcache_get_all(id_list->servers, &list)) {
3936 if (silc_idcache_list_first(list, &id_cache)) {
3938 entry = (SilcServerEntry)id_cache->context;
3940 /* Do not announce the one we've sending our announcements and
3941 do not announce ourself. Also check the creation time if it's
3943 if ((entry == remote) || (entry == server->id_entry) ||
3944 (creation_time && entry->data.created < creation_time)) {
3945 if (!silc_idcache_list_next(list, &id_cache))
3950 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3952 *servers = silc_buffer_realloc(*servers,
3954 (*servers)->truelen + idp->len :
3956 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3957 silc_buffer_put(*servers, idp->data, idp->len);
3958 silc_buffer_pull(*servers, idp->len);
3959 silc_buffer_free(idp);
3961 if (!silc_idcache_list_next(list, &id_cache))
3966 silc_idcache_list_free(list);
3971 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3977 p = silc_notify_payload_encode(notify, argc, ap);
3983 /* This function is used by router to announce existing servers to our
3984 primary router when we've connected to it. If `creation_time' is non-zero
3985 then only the servers that has been created after the `creation_time'
3986 will be announced. */
3988 void silc_server_announce_servers(SilcServer server, bool global,
3989 unsigned long creation_time,
3990 SilcSocketConnection remote)
3992 SilcBuffer servers = NULL;
3994 SILC_LOG_DEBUG(("Announcing servers"));
3996 /* Get servers in local list */
3997 silc_server_announce_get_servers(server, remote->user_data,
3998 server->local_list, &servers,
4002 /* Get servers in global list */
4003 silc_server_announce_get_servers(server, remote->user_data,
4004 server->global_list, &servers,
4008 silc_buffer_push(servers, servers->data - servers->head);
4009 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4011 /* Send the packet */
4012 silc_server_packet_send(server, remote,
4013 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4014 servers->data, servers->len, TRUE);
4016 silc_buffer_free(servers);
4020 /* Returns assembled packet of all clients in the given ID list. The
4021 packet's form is dictated by the New ID Payload. */
4023 static void silc_server_announce_get_clients(SilcServer server,
4025 SilcBuffer *clients,
4027 unsigned long creation_time)
4029 SilcIDCacheList list;
4030 SilcIDCacheEntry id_cache;
4031 SilcClientEntry client;
4034 unsigned char mode[4];
4036 /* Go through all clients in the list */
4037 if (silc_idcache_get_all(id_list->clients, &list)) {
4038 if (silc_idcache_list_first(list, &id_cache)) {
4040 client = (SilcClientEntry)id_cache->context;
4042 if (creation_time && client->data.created < creation_time) {
4043 if (!silc_idcache_list_next(list, &id_cache))
4047 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4048 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4049 if (!silc_idcache_list_next(list, &id_cache))
4054 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4056 *clients = silc_buffer_realloc(*clients,
4058 (*clients)->truelen + idp->len :
4060 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4061 silc_buffer_put(*clients, idp->data, idp->len);
4062 silc_buffer_pull(*clients, idp->len);
4064 SILC_PUT32_MSB(client->mode, mode);
4066 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4067 2, idp->data, idp->len,
4069 *umodes = silc_buffer_realloc(*umodes,
4071 (*umodes)->truelen + tmp->len :
4073 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4074 silc_buffer_put(*umodes, tmp->data, tmp->len);
4075 silc_buffer_pull(*umodes, tmp->len);
4076 silc_buffer_free(tmp);
4078 silc_buffer_free(idp);
4080 if (!silc_idcache_list_next(list, &id_cache))
4085 silc_idcache_list_free(list);
4089 /* This function is used to announce our existing clients to our router
4090 when we've connected to it. If `creation_time' is non-zero then only
4091 the clients that has been created after the `creation_time' will be
4094 void silc_server_announce_clients(SilcServer server,
4095 unsigned long creation_time,
4096 SilcSocketConnection remote)
4098 SilcBuffer clients = NULL;
4099 SilcBuffer umodes = NULL;
4101 SILC_LOG_DEBUG(("Announcing clients"));
4103 /* Get clients in local list */
4104 silc_server_announce_get_clients(server, server->local_list,
4105 &clients, &umodes, creation_time);
4107 /* As router we announce our global list as well */
4108 if (server->server_type == SILC_ROUTER)
4109 silc_server_announce_get_clients(server, server->global_list,
4110 &clients, &umodes, creation_time);
4113 silc_buffer_push(clients, clients->data - clients->head);
4114 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4116 /* Send the packet */
4117 silc_server_packet_send(server, remote,
4118 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4119 clients->data, clients->len, TRUE);
4121 silc_buffer_free(clients);
4125 silc_buffer_push(umodes, umodes->data - umodes->head);
4126 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4128 /* Send the packet */
4129 silc_server_packet_send(server, remote,
4130 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4131 umodes->data, umodes->len, TRUE);
4133 silc_buffer_free(umodes);
4137 /* Returns channel's topic for announcing it */
4139 void silc_server_announce_get_channel_topic(SilcServer server,
4140 SilcChannelEntry channel,
4145 if (channel->topic) {
4146 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4147 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4148 chidp->data, chidp->len,
4150 strlen(channel->topic));
4151 silc_buffer_free(chidp);
4155 /* Returns assembled packets for channel users of the `channel'. */
4157 void silc_server_announce_get_channel_users(SilcServer server,
4158 SilcChannelEntry channel,
4159 SilcBuffer *channel_modes,
4160 SilcBuffer *channel_users,
4161 SilcBuffer *channel_users_modes)
4163 SilcChannelClientEntry chl;
4164 SilcHashTableList htl;
4165 SilcBuffer chidp, clidp, csidp;
4168 unsigned char mode[4], *fkey = NULL;
4169 SilcUInt32 fkey_len = 0;
4172 SILC_LOG_DEBUG(("Start"));
4174 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4175 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4178 SILC_PUT32_MSB(channel->mode, mode);
4179 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4180 if (channel->founder_key)
4181 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4183 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4184 6, csidp->data, csidp->len,
4187 hmac, hmac ? strlen(hmac) : 0,
4188 channel->passphrase,
4189 channel->passphrase ?
4190 strlen(channel->passphrase) : 0,
4194 silc_buffer_realloc(*channel_modes,
4196 (*channel_modes)->truelen + len : len));
4197 silc_buffer_pull_tail(*channel_modes,
4198 ((*channel_modes)->end -
4199 (*channel_modes)->data));
4200 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4201 silc_buffer_pull(*channel_modes, len);
4202 silc_buffer_free(tmp);
4207 /* Now find all users on the channel */
4208 silc_hash_table_list(channel->user_list, &htl);
4209 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4210 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4213 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4214 clidp->data, clidp->len,
4215 chidp->data, chidp->len);
4218 silc_buffer_realloc(*channel_users,
4220 (*channel_users)->truelen + len : len));
4221 silc_buffer_pull_tail(*channel_users,
4222 ((*channel_users)->end -
4223 (*channel_users)->data));
4225 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4226 silc_buffer_pull(*channel_users, len);
4227 silc_buffer_free(tmp);
4229 /* CUMODE notify for mode change on the channel */
4230 SILC_PUT32_MSB(chl->mode, mode);
4231 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4232 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4233 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4234 4, csidp->data, csidp->len,
4236 clidp->data, clidp->len,
4239 *channel_users_modes =
4240 silc_buffer_realloc(*channel_users_modes,
4241 (*channel_users_modes ?
4242 (*channel_users_modes)->truelen + len : len));
4243 silc_buffer_pull_tail(*channel_users_modes,
4244 ((*channel_users_modes)->end -
4245 (*channel_users_modes)->data));
4247 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4248 silc_buffer_pull(*channel_users_modes, len);
4249 silc_buffer_free(tmp);
4253 silc_buffer_free(clidp);
4255 silc_hash_table_list_reset(&htl);
4256 silc_buffer_free(chidp);
4257 silc_buffer_free(csidp);
4260 /* Returns assembled packets for all channels and users on those channels
4261 from the given ID List. The packets are in the form dictated by the
4262 New Channel and New Channel User payloads. */
4264 void silc_server_announce_get_channels(SilcServer server,
4266 SilcBuffer *channels,
4267 SilcBuffer **channel_modes,
4268 SilcBuffer *channel_users,
4269 SilcBuffer **channel_users_modes,
4270 SilcUInt32 *channel_users_modes_c,
4271 SilcBuffer **channel_topics,
4272 SilcChannelID ***channel_ids,
4273 unsigned long creation_time)
4275 SilcIDCacheList list;
4276 SilcIDCacheEntry id_cache;
4277 SilcChannelEntry channel;
4280 SilcUInt16 name_len;
4282 int i = *channel_users_modes_c;
4285 SILC_LOG_DEBUG(("Start"));
4287 /* Go through all channels in the list */
4288 if (silc_idcache_get_all(id_list->channels, &list)) {
4289 if (silc_idcache_list_first(list, &id_cache)) {
4291 channel = (SilcChannelEntry)id_cache->context;
4293 if (creation_time && channel->created < creation_time)
4298 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4299 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4300 name_len = strlen(channel->channel_name);
4303 len = 4 + name_len + id_len + 4;
4305 silc_buffer_realloc(*channels,
4306 (*channels ? (*channels)->truelen +
4308 silc_buffer_pull_tail(*channels,
4309 ((*channels)->end - (*channels)->data));
4310 silc_buffer_format(*channels,
4311 SILC_STR_UI_SHORT(name_len),
4312 SILC_STR_UI_XNSTRING(channel->channel_name,
4314 SILC_STR_UI_SHORT(id_len),
4315 SILC_STR_UI_XNSTRING(cid, id_len),
4316 SILC_STR_UI_INT(channel->mode),
4318 silc_buffer_pull(*channels, len);
4321 if (creation_time && channel->updated < creation_time)
4327 /* Channel user modes */
4328 *channel_users_modes = silc_realloc(*channel_users_modes,
4329 sizeof(**channel_users_modes) *
4331 (*channel_users_modes)[i] = NULL;
4332 *channel_modes = silc_realloc(*channel_modes,
4333 sizeof(**channel_modes) * (i + 1));
4334 (*channel_modes)[i] = NULL;
4335 *channel_ids = silc_realloc(*channel_ids,
4336 sizeof(**channel_ids) * (i + 1));
4337 (*channel_ids)[i] = NULL;
4338 silc_server_announce_get_channel_users(server, channel,
4339 &(*channel_modes)[i],
4341 &(*channel_users_modes)[i]);
4342 (*channel_ids)[i] = channel->id;
4344 /* Channel's topic */
4345 *channel_topics = silc_realloc(*channel_topics,
4346 sizeof(**channel_topics) * (i + 1));
4347 (*channel_topics)[i] = NULL;
4348 silc_server_announce_get_channel_topic(server, channel,
4349 &(*channel_topics)[i]);
4350 (*channel_users_modes_c)++;
4354 if (!silc_idcache_list_next(list, &id_cache))
4359 silc_idcache_list_free(list);
4363 /* This function is used to announce our existing channels to our router
4364 when we've connected to it. This also announces the users on the
4365 channels to the router. If the `creation_time' is non-zero only the
4366 channels that was created after the `creation_time' are announced.
4367 Note that the channel users are still announced even if the `creation_time'
4370 void silc_server_announce_channels(SilcServer server,
4371 unsigned long creation_time,
4372 SilcSocketConnection remote)
4374 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4375 SilcBuffer *channel_users_modes = NULL;
4376 SilcBuffer *channel_topics = NULL;
4377 SilcUInt32 channel_users_modes_c = 0;
4378 SilcChannelID **channel_ids = NULL;
4380 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4382 /* Get channels and channel users in local list */
4383 silc_server_announce_get_channels(server, server->local_list,
4384 &channels, &channel_modes,
4386 &channel_users_modes,
4387 &channel_users_modes_c,
4389 &channel_ids, creation_time);
4391 /* Get channels and channel users in global list */
4392 if (server->server_type != SILC_SERVER)
4393 silc_server_announce_get_channels(server, server->global_list,
4394 &channels, &channel_modes,
4396 &channel_users_modes,
4397 &channel_users_modes_c,
4399 &channel_ids, creation_time);
4402 silc_buffer_push(channels, channels->data - channels->head);
4403 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4405 /* Send the packet */
4406 silc_server_packet_send(server, remote,
4407 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4408 channels->data, channels->len,
4411 silc_buffer_free(channels);
4414 if (channel_users) {
4415 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4416 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4417 channel_users->len);
4419 /* Send the packet */
4420 silc_server_packet_send(server, remote,
4421 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4422 channel_users->data, channel_users->len,
4425 silc_buffer_free(channel_users);
4428 if (channel_modes) {
4431 for (i = 0; i < channel_users_modes_c; i++) {
4432 if (!channel_modes[i])
4434 silc_buffer_push(channel_modes[i],
4435 channel_modes[i]->data -
4436 channel_modes[i]->head);
4437 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4438 channel_modes[i]->len);
4439 silc_server_packet_send_dest(server, remote,
4440 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4441 channel_ids[i], SILC_ID_CHANNEL,
4442 channel_modes[i]->data,
4443 channel_modes[i]->len,
4445 silc_buffer_free(channel_modes[i]);
4447 silc_free(channel_modes);
4450 if (channel_users_modes) {
4453 for (i = 0; i < channel_users_modes_c; i++) {
4454 if (!channel_users_modes[i])
4456 silc_buffer_push(channel_users_modes[i],
4457 channel_users_modes[i]->data -
4458 channel_users_modes[i]->head);
4459 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4460 channel_users_modes[i]->len);
4461 silc_server_packet_send_dest(server, remote,
4462 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4463 channel_ids[i], SILC_ID_CHANNEL,
4464 channel_users_modes[i]->data,
4465 channel_users_modes[i]->len,
4467 silc_buffer_free(channel_users_modes[i]);
4469 silc_free(channel_users_modes);
4472 if (channel_topics) {
4475 for (i = 0; i < channel_users_modes_c; i++) {
4476 if (!channel_topics[i])
4479 silc_buffer_push(channel_topics[i],
4480 channel_topics[i]->data -
4481 channel_topics[i]->head);
4482 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4483 channel_topics[i]->len);
4484 silc_server_packet_send_dest(server, remote,
4485 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4486 channel_ids[i], SILC_ID_CHANNEL,
4487 channel_topics[i]->data,
4488 channel_topics[i]->len,
4490 silc_buffer_free(channel_topics[i]);
4492 silc_free(channel_topics);
4495 silc_free(channel_ids);
4498 /* Failure timeout callback. If this is called then we will immediately
4499 process the received failure. We always process the failure with timeout
4500 since we do not want to blindly trust to received failure packets.
4501 This won't be called (the timeout is cancelled) if the failure was
4502 bogus (it is bogus if remote does not close the connection after sending
4505 SILC_TASK_CALLBACK(silc_server_failure_callback)
4507 SilcServer server = app_context;
4508 SilcServerFailureContext f = (SilcServerFailureContext)context;
4510 if (f->sock->protocol) {
4511 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4512 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4515 silc_socket_free(f->sock);
4519 /* Assembles user list and users mode list from the `channel'. */
4521 bool silc_server_get_users_on_channel(SilcServer server,
4522 SilcChannelEntry channel,
4523 SilcBuffer *user_list,
4524 SilcBuffer *mode_list,
4525 SilcUInt32 *user_count)
4527 SilcChannelClientEntry chl;
4528 SilcHashTableList htl;
4529 SilcBuffer client_id_list;
4530 SilcBuffer client_mode_list;
4532 SilcUInt32 list_count = 0, len = 0;
4534 if (!silc_hash_table_count(channel->user_list))
4537 silc_hash_table_list(channel->user_list, &htl);
4538 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4539 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4540 silc_hash_table_list_reset(&htl);
4542 client_id_list = silc_buffer_alloc(len);
4544 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4545 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4546 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4548 silc_hash_table_list(channel->user_list, &htl);
4549 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4551 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4552 silc_buffer_put(client_id_list, idp->data, idp->len);
4553 silc_buffer_pull(client_id_list, idp->len);
4554 silc_buffer_free(idp);
4556 /* Client's mode on channel */
4557 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4558 silc_buffer_pull(client_mode_list, 4);
4562 silc_hash_table_list_reset(&htl);
4563 silc_buffer_push(client_id_list,
4564 client_id_list->data - client_id_list->head);
4565 silc_buffer_push(client_mode_list,
4566 client_mode_list->data - client_mode_list->head);
4568 *user_list = client_id_list;
4569 *mode_list = client_mode_list;
4570 *user_count = list_count;
4574 /* Saves users and their modes to the `channel'. */
4576 void silc_server_save_users_on_channel(SilcServer server,
4577 SilcSocketConnection sock,
4578 SilcChannelEntry channel,
4579 SilcClientID *noadd,
4580 SilcBuffer user_list,
4581 SilcBuffer mode_list,
4582 SilcUInt32 user_count)
4587 SilcClientID *client_id;
4588 SilcClientEntry client;
4589 SilcIDCacheEntry cache;
4590 SilcChannelClientEntry chl;
4592 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4593 channel->channel_name));
4595 for (i = 0; i < user_count; i++) {
4597 SILC_GET16_MSB(idp_len, user_list->data + 2);
4599 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4600 silc_buffer_pull(user_list, idp_len);
4605 SILC_GET32_MSB(mode, mode_list->data);
4606 silc_buffer_pull(mode_list, 4);
4608 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4609 silc_free(client_id);
4615 /* Check if we have this client cached already. */
4616 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4617 server->server_type, &cache);
4619 client = silc_idlist_find_client_by_id(server->global_list,
4620 client_id, server->server_type,
4623 /* If router did not find such Client ID in its lists then this must
4624 be bogus client or some router in the net is buggy. */
4625 if (server->server_type != SILC_SERVER) {
4626 silc_free(client_id);
4630 /* We don't have that client anywhere, add it. The client is added
4631 to global list since server didn't have it in the lists so it must be
4633 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4634 silc_id_dup(client_id, SILC_ID_CLIENT),
4635 sock->user_data, NULL, 0);
4637 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4638 silc_free(client_id);
4642 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4647 silc_free(client_id);
4649 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4650 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4651 "%s", channel->channel_name));
4655 if (!silc_server_client_on_channel(client, channel, &chl)) {
4656 /* Client was not on the channel, add it. */
4657 chl = silc_calloc(1, sizeof(*chl));
4658 chl->client = client;
4660 chl->channel = channel;
4661 silc_hash_table_add(channel->user_list, chl->client, chl);
4662 silc_hash_table_add(client->channels, chl->channel, chl);
4663 channel->user_count++;
4671 /* Saves channels and channels user modes to the `client'. Removes
4672 the client from those channels that are not sent in the list but
4675 void silc_server_save_user_channels(SilcServer server,
4676 SilcSocketConnection sock,
4677 SilcClientEntry client,
4678 SilcBuffer channels,
4679 SilcBuffer channels_user_modes)
4682 SilcUInt32 *chumodes;
4683 SilcChannelPayload entry;
4684 SilcChannelEntry channel;
4685 SilcChannelID *channel_id;
4686 SilcChannelClientEntry chl;
4687 SilcHashTable ht = NULL;
4688 SilcHashTableList htl;
4692 if (!channels || !channels_user_modes ||
4693 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4696 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4697 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4699 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4700 NULL, NULL, NULL, TRUE);
4701 silc_dlist_start(ch);
4702 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4703 /* Check if we have this channel, and add it if we don't have it.
4704 Also add the client on the channel unless it is there already. */
4705 channel_id = silc_channel_get_id_parse(entry);
4706 channel = silc_idlist_find_channel_by_id(server->local_list,
4709 channel = silc_idlist_find_channel_by_id(server->global_list,
4712 if (server->server_type != SILC_SERVER) {
4713 silc_free(channel_id);
4718 /* We don't have that channel anywhere, add it. */
4719 name = silc_channel_get_name(entry, NULL);
4720 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4721 channel_id, server->router,
4724 silc_free(channel_id);
4731 channel->mode = silc_channel_get_mode(entry);
4733 /* Add the client on the channel */
4734 if (!silc_server_client_on_channel(client, channel, &chl)) {
4735 chl = silc_calloc(1, sizeof(*chl));
4736 chl->client = client;
4737 chl->mode = chumodes[i++];
4738 chl->channel = channel;
4739 silc_hash_table_add(channel->user_list, chl->client, chl);
4740 silc_hash_table_add(client->channels, chl->channel, chl);
4741 channel->user_count++;
4744 chl->mode = chumodes[i++];
4747 silc_hash_table_add(ht, channel, channel);
4748 silc_free(channel_id);
4750 silc_channel_payload_list_free(ch);
4751 silc_free(chumodes);
4755 /* Go through the list again and remove client from channels that
4756 are no part of the list. */
4758 silc_hash_table_list(client->channels, &htl);
4759 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4760 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4761 silc_hash_table_del(chl->channel->user_list, chl->client);
4762 silc_hash_table_del(chl->client->channels, chl->channel);
4766 silc_hash_table_list_reset(&htl);
4767 silc_hash_table_free(ht);
4769 silc_hash_table_list(client->channels, &htl);
4770 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4771 silc_hash_table_del(chl->channel->user_list, chl->client);
4772 silc_hash_table_del(chl->client->channels, chl->channel);
4775 silc_hash_table_list_reset(&htl);
4779 /* Lookups route to the client indicated by the `id_data'. The connection
4780 object and internal data object is returned. Returns NULL if route
4781 could not be found to the client. If the `client_id' is specified then
4782 it is used and the `id_data' is ignored. */
4784 SilcSocketConnection
4785 silc_server_get_client_route(SilcServer server,
4786 unsigned char *id_data,
4788 SilcClientID *client_id,
4789 SilcIDListData *idata,
4790 SilcClientEntry *client_entry)
4793 SilcClientEntry client;
4795 SILC_LOG_DEBUG(("Start"));
4798 *client_entry = NULL;
4800 /* Decode destination Client ID */
4802 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4804 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4808 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4811 /* If the destination belongs to our server we don't have to route
4812 the packet anywhere but to send it to the local destination. */
4813 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4817 /* If we are router and the client has router then the client is in
4818 our cell but not directly connected to us. */
4819 if (server->server_type == SILC_ROUTER && client->router) {
4820 /* We are of course in this case the client's router thus the route
4821 to the client is the server who owns the client. So, we will send
4822 the packet to that server. */
4824 *idata = (SilcIDListData)client->router;
4825 return client->router->connection;
4828 /* Seems that client really is directly connected to us */
4830 *idata = (SilcIDListData)client;
4832 *client_entry = client;
4833 return client->connection;
4836 /* Destination belongs to someone not in this server. If we are normal
4837 server our action is to send the packet to our router. */
4838 if (server->server_type != SILC_ROUTER && !server->standalone) {
4841 *idata = (SilcIDListData)server->router;
4842 return SILC_PRIMARY_ROUTE(server);
4845 /* We are router and we will perform route lookup for the destination
4846 and send the packet to fastest route. */
4847 if (server->server_type == SILC_ROUTER && !server->standalone) {
4848 /* Check first that the ID is valid */
4849 client = silc_idlist_find_client_by_id(server->global_list, id,
4852 SilcSocketConnection dst_sock;
4854 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4858 *idata = (SilcIDListData)dst_sock->user_data;
4867 /* Encodes and returns channel list of channels the `client' has joined.
4868 Secret channels are not put to the list. */
4870 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4871 SilcClientEntry client,
4874 SilcBuffer *user_mode_list)
4876 SilcBuffer buffer = NULL;
4877 SilcChannelEntry channel;
4878 SilcChannelClientEntry chl;
4879 SilcHashTableList htl;
4882 SilcUInt16 name_len;
4886 *user_mode_list = NULL;
4888 silc_hash_table_list(client->channels, &htl);
4889 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4890 channel = chl->channel;
4892 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4894 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4897 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4898 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4899 name_len = strlen(channel->channel_name);
4901 len = 4 + name_len + id_len + 4;
4902 buffer = silc_buffer_realloc(buffer,
4903 (buffer ? buffer->truelen + len : len));
4904 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4905 silc_buffer_format(buffer,
4906 SILC_STR_UI_SHORT(name_len),
4907 SILC_STR_UI_XNSTRING(channel->channel_name,
4909 SILC_STR_UI_SHORT(id_len),
4910 SILC_STR_UI_XNSTRING(cid, id_len),
4911 SILC_STR_UI_INT(chl->channel->mode),
4913 silc_buffer_pull(buffer, len);
4916 if (user_mode_list) {
4917 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4919 (*user_mode_list)->truelen + 4 :
4921 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4922 (*user_mode_list)->data));
4923 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4924 silc_buffer_pull(*user_mode_list, 4);
4927 silc_hash_table_list_reset(&htl);
4930 silc_buffer_push(buffer, buffer->data - buffer->head);
4931 if (user_mode_list && *user_mode_list)
4932 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4933 (*user_mode_list)->head));
4938 /* A timeout callback for the re-key. We will be the initiator of the
4941 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4943 SilcServer server = app_context;
4944 SilcSocketConnection sock = (SilcSocketConnection)context;
4945 SilcIDListData idata = (SilcIDListData)sock->user_data;
4946 SilcProtocol protocol;
4947 SilcServerRekeyInternalContext *proto_ctx;
4949 /* Allocate internal protocol context. This is sent as context
4951 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4952 proto_ctx->server = (void *)server;
4953 proto_ctx->sock = sock;
4954 proto_ctx->responder = FALSE;
4955 proto_ctx->pfs = idata->rekey->pfs;
4957 /* Perform rekey protocol. Will call the final callback after the
4958 protocol is over. */
4959 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4960 &protocol, proto_ctx, silc_server_rekey_final);
4961 sock->protocol = protocol;
4963 /* Run the protocol */
4964 silc_protocol_execute(protocol, server->schedule, 0, 0);
4966 SILC_LOG_DEBUG(("Rekey protocol completed"));
4968 /* Re-register re-key timeout */
4969 silc_schedule_task_add(server->schedule, sock->sock,
4970 silc_server_rekey_callback,
4971 context, idata->rekey->timeout, 0,
4972 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4975 /* The final callback for the REKEY protocol. This will actually take the
4976 new key material into use. */
4978 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4980 SilcProtocol protocol = (SilcProtocol)context;
4981 SilcServerRekeyInternalContext *ctx =
4982 (SilcServerRekeyInternalContext *)protocol->context;
4983 SilcServer server = (SilcServer)ctx->server;
4984 SilcSocketConnection sock = ctx->sock;
4986 SILC_LOG_DEBUG(("Start"));
4988 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4989 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4990 /* Error occured during protocol */
4991 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4992 silc_protocol_cancel(protocol, server->schedule);
4993 silc_protocol_free(protocol);
4994 sock->protocol = NULL;
4996 silc_packet_context_free(ctx->packet);
4998 silc_ske_free(ctx->ske);
5003 /* Purge the outgoing data queue to assure that all rekey packets really
5004 go to the network before we quit the protocol. */
5005 silc_server_packet_queue_purge(server, sock);
5008 silc_protocol_free(protocol);
5009 sock->protocol = NULL;
5011 silc_packet_context_free(ctx->packet);
5013 silc_ske_free(ctx->ske);
5017 /* Task callback used to retrieve network statistical information from
5018 router server once in a while. */
5020 SILC_TASK_CALLBACK(silc_server_get_stats)
5022 SilcServer server = (SilcServer)context;
5023 SilcBuffer idp, packet;
5025 SILC_LOG_DEBUG(("Retrieving stats from router"));
5027 if (!server->standalone) {
5028 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5029 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5030 ++server->cmd_ident, 1,
5031 1, idp->data, idp->len);
5032 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5033 SILC_PACKET_COMMAND, 0, packet->data,
5034 packet->len, FALSE);
5035 silc_buffer_free(packet);
5036 silc_buffer_free(idp);
5039 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5040 server, 120, 0, SILC_TASK_TIMEOUT,