5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 * This is the actual SILC server than handles everything relating to
21 * servicing the SILC connections. This is also a SILC router as a router
22 * is also normal server.
26 #include "serverincludes.h"
27 #include "server_internal.h"
29 /* Static prototypes */
30 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
81 SilcIDCacheEntry cache;
90 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
91 silc_dlist_del(server->sim, sim);
94 silc_dlist_uninit(server->sim);
98 silc_server_backup_free(server);
99 silc_server_config_unref(&server->config_ref);
101 silc_rng_free(server->rng);
103 silc_pkcs_free(server->pkcs);
104 if (server->public_key)
105 silc_pkcs_public_key_free(server->public_key);
106 if (server->private_key)
107 silc_pkcs_private_key_free(server->private_key);
108 if (server->pending_commands)
109 silc_dlist_uninit(server->pending_commands);
110 if (server->id_entry)
111 silc_idlist_del_server(server->local_list, server->id_entry);
113 /* Delete all channels */
115 if (silc_idcache_get_all(server->local_list->channels, &list) &&
116 silc_idcache_list_first(list, &cache)) {
117 silc_idlist_del_channel(server->local_list, cache->context);
118 while (silc_idcache_list_next(list, &cache))
119 silc_idlist_del_channel(server->local_list, cache->context);
122 silc_idcache_list_free(list);
124 if (silc_idcache_get_all(server->global_list->channels, &list) &&
125 silc_idcache_list_first(list, &cache)) {
126 silc_idlist_del_channel(server->global_list, cache->context);
127 while (silc_idcache_list_next(list, &cache))
128 silc_idlist_del_channel(server->global_list, cache->context);
131 silc_idcache_list_free(list);
133 /* Delete all clients */
135 if (silc_idcache_get_all(server->local_list->clients, &list) &&
136 silc_idcache_list_first(list, &cache)) {
137 silc_idlist_del_client(server->local_list, cache->context);
138 while (silc_idcache_list_next(list, &cache))
139 silc_idlist_del_client(server->local_list, cache->context);
142 silc_idcache_list_free(list);
144 if (silc_idcache_get_all(server->global_list->clients, &list) &&
145 silc_idcache_list_first(list, &cache)) {
146 silc_idlist_del_client(server->global_list, cache->context);
147 while (silc_idcache_list_next(list, &cache))
148 silc_idlist_del_client(server->global_list, cache->context);
151 silc_idcache_list_free(list);
153 /* Delete all servers */
155 if (silc_idcache_get_all(server->local_list->servers, &list) &&
156 silc_idcache_list_first(list, &cache)) {
157 silc_idlist_del_server(server->local_list, cache->context);
158 while (silc_idcache_list_next(list, &cache))
159 silc_idlist_del_server(server->local_list, cache->context);
162 silc_idcache_list_free(list);
164 if (silc_idcache_get_all(server->global_list->servers, &list) &&
165 silc_idcache_list_first(list, &cache)) {
166 silc_idlist_del_server(server->global_list, cache->context);
167 while (silc_idcache_list_next(list, &cache))
168 silc_idlist_del_server(server->global_list, cache->context);
171 silc_idcache_list_free(list);
173 silc_idcache_free(server->local_list->clients);
174 silc_idcache_free(server->local_list->servers);
175 silc_idcache_free(server->local_list->channels);
176 silc_idcache_free(server->global_list->clients);
177 silc_idcache_free(server->global_list->servers);
178 silc_idcache_free(server->global_list->channels);
179 silc_hash_table_free(server->watcher_list);
181 silc_hash_free(server->md5hash);
182 silc_hash_free(server->sha1hash);
183 silc_hmac_unregister_all();
184 silc_hash_unregister_all();
185 silc_cipher_unregister_all();
186 silc_pkcs_unregister_all();
188 silc_free(server->local_list);
189 silc_free(server->global_list);
190 silc_free(server->server_name);
191 silc_free(server->id_string);
192 silc_free(server->purge_i);
193 silc_free(server->purge_g);
197 /* Creates a new server listener. */
199 static bool silc_server_listen(SilcServer server, const char *server_ip,
200 SilcUInt16 port, int *sock)
202 *sock = silc_net_create_server(port, server_ip);
204 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
211 /* Adds a secondary listener. */
213 bool silc_server_init_secondary(SilcServer server)
215 int sock = 0, sock_list[server->config->param.connections_max];
216 SilcSocketConnection newsocket = NULL;
217 SilcServerConfigServerInfoInterface *interface;
219 for (interface = server->config->server_info->secondary; interface;
220 interface = interface->next, sock++) {
222 if (!silc_server_listen(server,
223 interface->server_ip, interface->port, &sock_list[sock]))
226 /* Set socket to non-blocking mode */
227 silc_net_set_socket_nonblock(sock_list[sock]);
229 /* Add ourselves also to the socket table. The entry allocated above
230 is sent as argument for fast referencing in the future. */
231 silc_socket_alloc(sock_list[sock],
232 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
233 server->sockets[sock_list[sock]] = newsocket;
234 SILC_SET_LISTENER(newsocket);
236 /* Perform name and address lookups to resolve the listenning address
238 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
240 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
242 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
243 newsocket->hostname ? newsocket->hostname :
244 newsocket->ip ? newsocket->ip : ""));
245 server->stat.conn_failures++;
248 if (!newsocket->hostname)
249 newsocket->hostname = strdup(newsocket->ip);
251 newsocket->port = silc_net_get_local_port(sock);
253 newsocket->user_data = (void *)server->id_entry;
254 silc_schedule_task_add(server->schedule, sock_list[sock],
255 silc_server_accept_new_connection,
256 (void *)server, 0, 0,
258 SILC_TASK_PRI_NORMAL);
264 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
268 /* Initializes the entire SILC server. This is called always before running
269 the server. This is called only once at the initialization of the program.
270 This binds the server to its listenning port. After this function returns
271 one should call silc_server_run to start the server. This returns TRUE
272 when everything is ok to run the server. Configuration file must be
273 read and parsed before calling this. */
275 bool silc_server_init(SilcServer server)
279 SilcServerEntry id_entry;
280 SilcIDListPurge purge;
281 SilcSocketConnection newsocket = NULL;
283 SILC_LOG_DEBUG(("Initializing server"));
285 server->starttime = time(NULL);
287 /* Take config object for us */
288 silc_server_config_ref(&server->config_ref, server->config,
291 /* Steal public and private key from the config object */
292 server->public_key = server->config->server_info->public_key;
293 server->private_key = server->config->server_info->private_key;
294 server->config->server_info->public_key = NULL;
295 server->config->server_info->private_key = NULL;
297 /* Register all configured ciphers, PKCS and hash functions. */
298 if (!silc_server_config_register_ciphers(server))
299 silc_cipher_register_default();
300 if (!silc_server_config_register_pkcs(server))
301 silc_pkcs_register_default();
302 if (!silc_server_config_register_hashfuncs(server))
303 silc_hash_register_default();
304 if (!silc_server_config_register_hmacs(server))
305 silc_hmac_register_default();
307 /* Initialize random number generator for the server. */
308 server->rng = silc_rng_alloc();
309 silc_rng_init(server->rng);
310 silc_rng_global_init(server->rng);
312 /* Initialize hash functions for server to use */
313 silc_hash_alloc("md5", &server->md5hash);
314 silc_hash_alloc("sha1", &server->sha1hash);
316 /* Allocate PKCS context for local public and private keys */
317 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
319 silc_pkcs_public_key_set(server->pkcs, server->public_key);
320 silc_pkcs_private_key_set(server->pkcs, server->private_key);
322 /* Initialize the scheduler */
323 server->schedule = silc_schedule_init(server->config->param.connections_max,
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 context = (void *)server;
1474 /* Check whether we could resolve both IP and FQDN. */
1475 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1476 server->config->require_reverse_lookup)) {
1477 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1478 sock->hostname ? sock->hostname :
1479 sock->ip ? sock->ip : ""));
1480 server->stat.conn_failures++;
1481 silc_server_disconnect_remote(server, sock,
1482 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1483 "Unknown host or IP");
1484 silc_free(proto_ctx);
1488 /* Register the connection for network input and output. This sets
1489 that scheduler will listen for incoming packets for this connection
1490 and sets that outgoing packets may be sent to this connection as well.
1491 However, this doesn't set the scheduler for outgoing traffic, it
1492 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1493 later when outgoing data is available. */
1494 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1496 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1499 /* Listenning port */
1500 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1501 silc_server_disconnect_remote(server, sock,
1502 SILC_STATUS_ERR_RESOURCE_LIMIT,
1503 "Connection refused");
1504 server->stat.conn_failures++;
1505 silc_free(proto_ctx);
1508 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1510 /* Check whether this connection is denied to connect to us. */
1511 deny = silc_server_config_find_denied(server, sock->ip);
1513 deny = silc_server_config_find_denied(server, sock->hostname);
1515 /* The connection is denied */
1516 SILC_LOG_INFO(("Connection %s (%s) is denied",
1517 sock->hostname, sock->ip));
1518 silc_server_disconnect_remote(server, sock,
1519 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1521 server->stat.conn_failures++;
1522 silc_free(proto_ctx);
1526 /* Check whether we have configured this sort of connection at all. We
1527 have to check all configurations since we don't know what type of
1528 connection this is. */
1529 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1530 cconfig = silc_server_config_find_client(server, sock->hostname);
1531 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1532 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1533 if (server->server_type == SILC_ROUTER) {
1534 if (!(rconfig = silc_server_config_find_router_conn(server,
1535 sock->ip, sock->port)))
1536 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1539 if (!cconfig && !sconfig && !rconfig) {
1540 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1542 silc_server_disconnect_remote(server, sock,
1543 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1544 server->stat.conn_failures++;
1545 silc_free(proto_ctx);
1549 /* The connection is allowed */
1551 /* Set internal context for key exchange protocol. This is
1552 sent as context for the protocol. */
1553 proto_ctx->sock = sock;
1554 proto_ctx->rng = server->rng;
1555 proto_ctx->responder = TRUE;
1556 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1557 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1558 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1560 /* Take flags for key exchange. Since we do not know what type of connection
1561 this is, we go through all found configurations and use the global ones
1562 as well. This will result always into strictest key exchange flags. */
1563 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1564 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1565 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1566 if (server->config->param.key_exchange_pfs)
1567 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1569 /* Prepare the connection for key exchange protocol. We allocate the
1570 protocol but will not start it yet. The connector will be the
1571 initiator of the protocol thus we will wait for initiation from
1572 there before we start the protocol. */
1573 server->stat.auth_attempts++;
1574 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1575 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1576 &sock->protocol, proto_ctx,
1577 silc_server_accept_new_connection_second);
1579 /* Register a timeout task that will be executed if the connector
1580 will not start the key exchange protocol within specified timeout
1581 and the connection will be closed. */
1582 proto_ctx->timeout_task =
1583 silc_schedule_task_add(server->schedule, sock->sock,
1584 silc_server_timeout_remote,
1586 server->config->key_exchange_timeout, 0,
1591 /* Accepts new connections to the server. Accepting new connections are
1592 done in three parts to make it async. */
1594 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1596 SilcServer server = (SilcServer)context;
1597 SilcSocketConnection newsocket;
1598 SilcServerKEInternalContext *proto_ctx;
1601 SILC_LOG_DEBUG(("Accepting new connection"));
1603 server->stat.conn_attempts++;
1605 sock = silc_net_accept_connection(fd);
1607 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1608 server->stat.conn_failures++;
1612 /* Check for maximum allowed connections */
1613 if (sock > server->config->param.connections_max) {
1614 SILC_LOG_ERROR(("Refusing connection, server is full"));
1615 server->stat.conn_failures++;
1616 silc_net_close_connection(sock);
1620 /* Set socket options */
1621 silc_net_set_socket_nonblock(sock);
1622 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1624 /* We don't create a ID yet, since we don't know what type of connection
1625 this is yet. But, we do add the connection to the socket table. */
1626 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1627 server->sockets[sock] = newsocket;
1629 /* Perform asynchronous host lookup. This will lookup the IP and the
1630 FQDN of the remote connection. After the lookup is done the connection
1631 is accepted further. */
1632 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1633 proto_ctx->server = server;
1634 proto_ctx->context = (void *)fd;
1635 silc_socket_host_lookup(newsocket, TRUE,
1636 silc_server_accept_new_connection_lookup,
1637 (void *)proto_ctx, server->schedule);
1640 /* Second part of accepting new connection. Key exchange protocol has been
1641 performed and now it is time to do little connection authentication
1642 protocol to figure out whether this connection is client or server
1643 and whether it has right to access this server (especially server
1644 connections needs to be authenticated). */
1646 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1648 SilcProtocol protocol = (SilcProtocol)context;
1649 SilcServerKEInternalContext *ctx =
1650 (SilcServerKEInternalContext *)protocol->context;
1651 SilcServer server = (SilcServer)ctx->server;
1652 SilcSocketConnection sock = ctx->sock;
1653 SilcServerConnAuthInternalContext *proto_ctx;
1655 SILC_LOG_DEBUG(("Start"));
1657 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1658 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1659 /* Error occured during protocol */
1660 SILC_LOG_DEBUG(("Error key exchange protocol"));
1661 silc_protocol_free(protocol);
1662 sock->protocol = NULL;
1663 silc_ske_free_key_material(ctx->keymat);
1665 silc_packet_context_free(ctx->packet);
1667 silc_ske_free(ctx->ske);
1668 silc_free(ctx->dest_id);
1669 silc_server_config_unref(&ctx->cconfig);
1670 silc_server_config_unref(&ctx->sconfig);
1671 silc_server_config_unref(&ctx->rconfig);
1673 silc_schedule_task_del_by_callback(server->schedule,
1674 silc_server_failure_callback);
1675 silc_server_disconnect_remote(server, sock,
1676 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1678 server->stat.auth_failures++;
1682 /* We now have the key material as the result of the key exchange
1683 protocol. Take the key material into use. Free the raw key material
1684 as soon as we've set them into use. */
1685 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1686 ctx->sock, ctx->keymat,
1687 ctx->ske->prop->cipher,
1688 ctx->ske->prop->pkcs,
1689 ctx->ske->prop->hash,
1690 ctx->ske->prop->hmac,
1691 ctx->ske->prop->group,
1693 SILC_LOG_ERROR(("Error setting key material in use"));
1694 silc_protocol_free(protocol);
1695 sock->protocol = NULL;
1696 silc_ske_free_key_material(ctx->keymat);
1698 silc_packet_context_free(ctx->packet);
1700 silc_ske_free(ctx->ske);
1701 silc_free(ctx->dest_id);
1702 silc_server_config_unref(&ctx->cconfig);
1703 silc_server_config_unref(&ctx->sconfig);
1704 silc_server_config_unref(&ctx->rconfig);
1706 silc_schedule_task_del_by_callback(server->schedule,
1707 silc_server_failure_callback);
1708 silc_server_disconnect_remote(server, sock,
1709 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1710 server->stat.auth_failures++;
1713 silc_ske_free_key_material(ctx->keymat);
1715 /* Allocate internal context for the authentication protocol. This
1716 is sent as context for the protocol. */
1717 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1718 proto_ctx->server = (void *)server;
1719 proto_ctx->sock = sock;
1720 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1721 proto_ctx->responder = TRUE;
1722 proto_ctx->dest_id_type = ctx->dest_id_type;
1723 proto_ctx->dest_id = ctx->dest_id;
1724 proto_ctx->cconfig = ctx->cconfig;
1725 proto_ctx->sconfig = ctx->sconfig;
1726 proto_ctx->rconfig = ctx->rconfig;
1728 /* Free old protocol as it is finished now */
1729 silc_protocol_free(protocol);
1731 silc_packet_context_free(ctx->packet);
1733 sock->protocol = NULL;
1735 /* Allocate the authentication protocol. This is allocated here
1736 but we won't start it yet. We will be receiving party of this
1737 protocol thus we will wait that connecting party will make
1738 their first move. */
1739 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1740 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1741 &sock->protocol, proto_ctx,
1742 silc_server_accept_new_connection_final);
1744 /* Register timeout task. If the protocol is not executed inside
1745 this timelimit the connection will be terminated. */
1746 proto_ctx->timeout_task =
1747 silc_schedule_task_add(server->schedule, sock->sock,
1748 silc_server_timeout_remote,
1750 server->config->conn_auth_timeout, 0,
1755 /* After this is called, server don't wait for backup router anymore.
1756 This gets called automatically even after we have backup router
1757 connection established. */
1759 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1761 SilcServer server = context;
1762 server->wait_backup = FALSE;
1765 /* Final part of accepting new connection. The connection has now
1766 been authenticated and keys has been exchanged. We also know whether
1767 this is client or server connection. */
1769 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1771 SilcProtocol protocol = (SilcProtocol)context;
1772 SilcServerConnAuthInternalContext *ctx =
1773 (SilcServerConnAuthInternalContext *)protocol->context;
1774 SilcServer server = (SilcServer)ctx->server;
1775 SilcSocketConnection sock = ctx->sock;
1776 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1778 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1780 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1781 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1782 /* Error occured during protocol */
1783 SILC_LOG_DEBUG(("Error during authentication protocol"));
1784 silc_protocol_free(protocol);
1785 sock->protocol = NULL;
1787 silc_packet_context_free(ctx->packet);
1789 silc_ske_free(ctx->ske);
1790 silc_free(ctx->dest_id);
1791 silc_server_config_unref(&ctx->cconfig);
1792 silc_server_config_unref(&ctx->sconfig);
1793 silc_server_config_unref(&ctx->rconfig);
1795 silc_schedule_task_del_by_callback(server->schedule,
1796 silc_server_failure_callback);
1797 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1799 server->stat.auth_failures++;
1803 entry->data.last_receive = time(NULL);
1805 switch (ctx->conn_type) {
1806 case SILC_SOCKET_TYPE_CLIENT:
1808 SilcClientEntry client;
1809 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1811 /* Verify whether this connection is after all allowed to connect */
1812 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1813 &server->config->param,
1814 conn->param, ctx->ske)) {
1815 server->stat.auth_failures++;
1819 /* If we are primary router and we have backup router configured
1820 but it has not connected to use yet, do not accept any other
1822 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1823 !server->backup_router) {
1824 SilcServerConfigRouter *router;
1825 router = silc_server_config_get_backup_router(server);
1826 if (router && strcmp(server->config->server_info->primary->server_ip,
1828 silc_server_find_socket_by_host(server,
1829 SILC_SOCKET_TYPE_SERVER,
1830 router->backup_replace_ip, 0)) {
1831 SILC_LOG_INFO(("Will not accept connections because we do "
1832 "not have backup router connection established"));
1833 silc_server_disconnect_remote(server, sock,
1834 SILC_STATUS_ERR_PERM_DENIED,
1835 "We do not have connection to backup "
1836 "router established, try later");
1837 silc_free(sock->user_data);
1838 server->stat.auth_failures++;
1840 /* From here on, wait 10 seconds for the backup router to appear. */
1841 silc_schedule_task_add(server->schedule, 0,
1842 silc_server_backup_router_wait,
1843 (void *)server, 10, 0,
1844 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1849 SILC_LOG_DEBUG(("Remote host is client"));
1850 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1853 /* Add the client to the client ID cache. The nickname and Client ID
1854 and other information is created after we have received NEW_CLIENT
1855 packet from client. */
1856 client = silc_idlist_add_client(server->local_list,
1857 NULL, NULL, NULL, NULL, NULL, sock, 0);
1859 SILC_LOG_ERROR(("Could not add new client to cache"));
1860 silc_free(sock->user_data);
1861 silc_server_disconnect_remote(server, sock,
1862 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1863 server->stat.auth_failures++;
1866 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1869 server->stat.my_clients++;
1870 server->stat.clients++;
1871 server->stat.cell_clients++;
1873 /* Get connection parameters */
1875 if (conn->param->keepalive_secs)
1876 hearbeat_timeout = conn->param->keepalive_secs;
1878 /* Check if to be anonymous connection */
1879 if (conn->param->anonymous)
1880 client->mode |= SILC_UMODE_ANONYMOUS;
1883 id_entry = (void *)client;
1886 case SILC_SOCKET_TYPE_SERVER:
1887 case SILC_SOCKET_TYPE_ROUTER:
1889 SilcServerEntry new_server;
1890 bool initiator = FALSE;
1891 bool backup_local = FALSE;
1892 bool backup_router = FALSE;
1893 char *backup_replace_ip = NULL;
1894 SilcUInt16 backup_replace_port = 0;
1895 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1896 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1898 /* If we are backup router and this is incoming server connection
1899 and we do not have connection to primary router, do not allow
1901 if (server->server_type == SILC_BACKUP_ROUTER &&
1902 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1903 !SILC_PRIMARY_ROUTE(server)) {
1904 SILC_LOG_INFO(("Will not accept server connection because we do "
1905 "not have primary router connection established"));
1906 silc_server_disconnect_remote(server, sock,
1907 SILC_STATUS_ERR_PERM_DENIED,
1908 "We do not have connection to primary "
1909 "router established, try later");
1910 silc_free(sock->user_data);
1911 server->stat.auth_failures++;
1915 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1916 /* Verify whether this connection is after all allowed to connect */
1917 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1918 &server->config->param,
1919 rconn ? rconn->param : NULL,
1921 silc_free(sock->user_data);
1922 server->stat.auth_failures++;
1928 if (rconn->param->keepalive_secs)
1929 hearbeat_timeout = rconn->param->keepalive_secs;
1932 initiator = rconn->initiator;
1933 backup_local = rconn->backup_local;
1934 backup_router = rconn->backup_router;
1935 backup_replace_ip = rconn->backup_replace_ip;
1936 backup_replace_port = rconn->backup_replace_port;
1940 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1941 /* Verify whether this connection is after all allowed to connect */
1942 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1943 &server->config->param,
1944 sconn ? sconn->param : NULL,
1946 silc_free(sock->user_data);
1947 server->stat.auth_failures++;
1952 if (sconn->param->keepalive_secs)
1953 hearbeat_timeout = sconn->param->keepalive_secs;
1956 backup_router = sconn->backup_router;
1960 /* If we are primary router and we have backup router configured
1961 but it has not connected to use yet, do not accept any other
1963 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1964 !server->backup_router && !backup_router) {
1965 SilcServerConfigRouter *router;
1966 router = silc_server_config_get_backup_router(server);
1967 if (router && strcmp(server->config->server_info->primary->server_ip,
1969 silc_server_find_socket_by_host(server,
1970 SILC_SOCKET_TYPE_SERVER,
1971 router->backup_replace_ip, 0)) {
1972 SILC_LOG_INFO(("Will not accept connections because we do "
1973 "not have backup router connection established"));
1974 silc_server_disconnect_remote(server, sock,
1975 SILC_STATUS_ERR_PERM_DENIED,
1976 "We do not have connection to backup "
1977 "router established, try later");
1978 silc_free(sock->user_data);
1979 server->stat.auth_failures++;
1981 /* From here on, wait 10 seconds for the backup router to appear. */
1982 silc_schedule_task_add(server->schedule, 0,
1983 silc_server_backup_router_wait,
1984 (void *)server, 10, 0,
1985 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1990 SILC_LOG_DEBUG(("Remote host is %s",
1991 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1992 "server" : (backup_router ?
1993 "backup router" : "router")));
1994 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1995 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1996 "server" : (backup_router ?
1997 "backup router" : "router")));
1999 /* Add the server into server cache. The server name and Server ID
2000 is updated after we have received NEW_SERVER packet from the
2001 server. We mark ourselves as router for this server if we really
2004 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2005 server->local_list : (backup_router ?
2006 server->local_list :
2007 server->global_list)),
2009 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2010 SILC_SERVER : SILC_ROUTER),
2012 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2013 server->id_entry : (backup_router ?
2014 server->id_entry : NULL)),
2017 SILC_LOG_ERROR(("Could not add new server to cache"));
2018 silc_free(sock->user_data);
2019 silc_server_disconnect_remote(server, sock,
2020 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2021 server->stat.auth_failures++;
2024 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2026 id_entry = (void *)new_server;
2028 /* If the incoming connection is router and marked as backup router
2029 then add it to be one of our backups */
2030 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2031 /* Change it back to SERVER type since that's what it really is. */
2033 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2034 new_server->server_type = SILC_BACKUP_ROUTER;
2036 /* Remove the backup waiting with timeout */
2037 silc_schedule_task_add(server->schedule, 0,
2038 silc_server_backup_router_wait,
2039 (void *)server, 5, 0,
2040 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2044 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2045 server->stat.my_servers++;
2047 server->stat.my_routers++;
2048 server->stat.routers++;
2050 server->stat.servers++;
2052 /* Check whether this connection is to be our primary router connection
2053 if we do not already have the primary route. */
2054 if (!backup_router &&
2055 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2056 if (silc_server_config_is_primary_route(server) && !initiator)
2059 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2060 server->standalone = FALSE;
2061 if (!server->id_entry->router) {
2062 server->id_entry->router = id_entry;
2063 server->router = id_entry;
2074 sock->type = ctx->conn_type;
2076 /* Add the common data structure to the ID entry. */
2077 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2079 /* Add to sockets internal pointer for fast referencing */
2080 silc_free(sock->user_data);
2081 sock->user_data = id_entry;
2083 /* Connection has been fully established now. Everything is ok. */
2084 SILC_LOG_DEBUG(("New connection authenticated"));
2086 /* Perform keepalive. The `hb_context' will be freed automatically
2087 when finally calling the silc_socket_free function. */
2088 silc_socket_set_heartbeat(sock, hearbeat_timeout, server,
2089 silc_server_perform_heartbeat,
2093 silc_schedule_task_del_by_callback(server->schedule,
2094 silc_server_failure_callback);
2095 silc_protocol_free(protocol);
2097 silc_packet_context_free(ctx->packet);
2099 silc_ske_free(ctx->ske);
2100 silc_free(ctx->dest_id);
2101 silc_server_config_unref(&ctx->cconfig);
2102 silc_server_config_unref(&ctx->sconfig);
2103 silc_server_config_unref(&ctx->rconfig);
2105 sock->protocol = NULL;
2108 /* This function is used to read packets from network and send packets to
2109 network. This is usually a generic task. */
2111 SILC_TASK_CALLBACK(silc_server_packet_process)
2113 SilcServer server = (SilcServer)context;
2114 SilcSocketConnection sock = server->sockets[fd];
2115 SilcIDListData idata;
2116 SilcCipher cipher = NULL;
2117 SilcHmac hmac = NULL;
2118 SilcUInt32 sequence = 0;
2122 SILC_LOG_DEBUG(("Unknown socket connection"));
2126 /* Packet sending */
2128 if (type == SILC_TASK_WRITE) {
2129 /* Do not send data to disconnected connection */
2130 if (SILC_IS_DISCONNECTED(sock)) {
2131 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2135 server->stat.packets_sent++;
2137 /* Send the packet */
2138 ret = silc_packet_send(sock, TRUE);
2140 /* If returned -2 could not write to connection now, will do
2146 SILC_LOG_ERROR(("Error sending packet to connection "
2147 "%s:%d [%s]", sock->hostname, sock->port,
2148 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2149 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2150 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2155 /* The packet has been sent and now it is time to set the connection
2156 back to only for input. When there is again some outgoing data
2157 available for this connection it will be set for output as well.
2158 This call clears the output setting and sets it only for input. */
2159 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2160 SILC_UNSET_OUTBUF_PENDING(sock);
2162 silc_buffer_clear(sock->outbuf);
2166 /* Packet receiving */
2168 /* Read some data from connection */
2169 ret = silc_packet_receive(sock);
2173 SILC_LOG_ERROR(("Error receiving packet from connection "
2174 "%s:%d [%s] %s", sock->hostname, sock->port,
2175 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2176 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2177 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2178 "Router"), strerror(errno)));
2184 SILC_LOG_DEBUG(("Read EOF"));
2186 /* If connection is disconnecting already we will finally
2187 close the connection */
2188 if (SILC_IS_DISCONNECTING(sock)) {
2189 if (sock->user_data)
2190 silc_server_free_sock_user_data(server, sock, NULL);
2191 silc_server_close_connection(server, sock);
2195 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2196 SILC_SET_DISCONNECTING(sock);
2198 if (sock->user_data) {
2200 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2201 silc_server_free_sock_user_data(server, sock, tmp);
2203 silc_server_free_sock_user_data(server, sock, NULL);
2204 } else if (server->router_conn && server->router_conn->sock == sock &&
2205 !server->router && server->standalone)
2206 silc_schedule_task_add(server->schedule, 0,
2207 silc_server_connect_to_router,
2210 SILC_TASK_PRI_NORMAL);
2212 silc_server_close_connection(server, sock);
2216 /* If connection is disconnecting or disconnected we will ignore
2218 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2219 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2223 /* Get keys and stuff from ID entry */
2224 idata = (SilcIDListData)sock->user_data;
2226 cipher = idata->receive_key;
2227 hmac = idata->hmac_receive;
2228 sequence = idata->psn_receive;
2231 /* Process the packet. This will call the parser that will then
2232 decrypt and parse the packet. */
2233 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2234 TRUE : FALSE, cipher, hmac, sequence,
2235 silc_server_packet_parse, server);
2237 /* If this socket connection is not authenticated yet and the packet
2238 processing failed we will drop the connection since it can be
2239 a malicious flooder. */
2240 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2241 (!sock->protocol || sock->protocol->protocol->type ==
2242 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2243 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2244 SILC_SET_DISCONNECTING(sock);
2246 if (sock->user_data)
2247 silc_server_free_sock_user_data(server, sock, NULL);
2248 silc_server_close_connection(server, sock);
2252 /* Parses whole packet, received earlier. */
2254 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2256 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2257 SilcServer server = (SilcServer)parse_ctx->context;
2258 SilcSocketConnection sock = parse_ctx->sock;
2259 SilcPacketContext *packet = parse_ctx->packet;
2260 SilcIDListData idata = (SilcIDListData)sock->user_data;
2263 server->stat.packets_received++;
2265 /* Parse the packet */
2266 if (parse_ctx->normal)
2267 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2269 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2271 /* If entry is disabled ignore what we got. */
2272 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2273 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2274 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2275 SILC_LOG_DEBUG(("Connection is disabled"));
2279 if (ret == SILC_PACKET_NONE) {
2280 SILC_LOG_DEBUG(("Error parsing packet"));
2284 /* Check that the the current client ID is same as in the client's packet. */
2285 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2286 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2287 if (client && client->id && packet->src_id) {
2288 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2289 packet->src_id_type);
2290 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2292 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2299 if (server->server_type == SILC_ROUTER) {
2300 /* Route the packet if it is not destined to us. Other ID types but
2301 server are handled separately after processing them. */
2302 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2303 packet->dst_id_type == SILC_ID_SERVER &&
2304 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2305 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2307 /* Route the packet to fastest route for the destination ID */
2308 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2309 packet->dst_id_type);
2312 silc_server_packet_route(server,
2313 silc_server_route_get(server, id,
2314 packet->dst_id_type),
2321 /* Parse the incoming packet type */
2322 silc_server_packet_parse_type(server, sock, packet);
2324 /* Broadcast packet if it is marked as broadcast packet and it is
2325 originated from router and we are router. */
2326 if (server->server_type == SILC_ROUTER &&
2327 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2328 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2329 /* Broadcast to our primary route */
2330 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2332 /* If we have backup routers then we need to feed all broadcast
2333 data to those servers. */
2334 silc_server_backup_broadcast(server, sock, packet);
2338 silc_packet_context_free(packet);
2339 silc_free(parse_ctx);
2342 /* Parser callback called by silc_packet_receive_process. This merely
2343 registers timeout that will handle the actual parsing when appropriate. */
2345 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2348 SilcServer server = (SilcServer)context;
2349 SilcSocketConnection sock = parser_context->sock;
2350 SilcIDListData idata = (SilcIDListData)sock->user_data;
2353 idata->psn_receive = parser_context->packet->sequence + 1;
2355 /* If protocol for this connection is key exchange or rekey then we'll
2356 process all packets synchronously, since there might be packets in
2357 queue that we are not able to decrypt without first processing the
2358 packets before them. */
2359 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2360 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2361 (sock->protocol && sock->protocol->protocol &&
2362 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2363 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2364 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2367 /* Reprocess data since we'll return FALSE here. This is because
2368 the idata->receive_key might have become valid in the last packet
2369 and we want to call this processor with valid cipher. */
2371 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2372 TRUE : FALSE, idata->receive_key,
2373 idata->hmac_receive, idata->psn_receive,
2374 silc_server_packet_parse, server);
2376 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2377 TRUE : FALSE, NULL, NULL, 0,
2378 silc_server_packet_parse, server);
2382 switch (sock->type) {
2383 case SILC_SOCKET_TYPE_UNKNOWN:
2384 case SILC_SOCKET_TYPE_CLIENT:
2385 /* Parse the packet with timeout */
2386 silc_schedule_task_add(server->schedule, sock->sock,
2387 silc_server_packet_parse_real,
2388 (void *)parser_context, 0, 100000,
2390 SILC_TASK_PRI_NORMAL);
2392 case SILC_SOCKET_TYPE_SERVER:
2393 case SILC_SOCKET_TYPE_ROUTER:
2394 /* Packets from servers are parsed immediately */
2395 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2405 /* Parses the packet type and calls what ever routines the packet type
2406 requires. This is done for all incoming packets. */
2408 void silc_server_packet_parse_type(SilcServer server,
2409 SilcSocketConnection sock,
2410 SilcPacketContext *packet)
2412 SilcPacketType type = packet->type;
2413 SilcIDListData idata = (SilcIDListData)sock->user_data;
2415 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2416 silc_get_packet_name(type), packet->flags));
2418 /* Parse the packet type */
2420 case SILC_PACKET_DISCONNECT:
2423 char *message = NULL;
2425 if (packet->flags & SILC_PACKET_FLAG_LIST)
2427 if (packet->buffer->len < 1)
2430 status = (SilcStatus)packet->buffer->data[0];
2431 if (packet->buffer->len > 1 &&
2432 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2433 message = silc_memdup(packet->buffer->data + 1,
2434 packet->buffer->len - 1);
2436 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2437 sock->ip, sock->hostname,
2438 silc_get_status_message(status), status,
2439 message ? message : ""));
2442 /* Handle the disconnection from our end too */
2443 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2444 silc_server_free_sock_user_data(server, sock, NULL);
2445 silc_server_close_connection(server, sock);
2449 case SILC_PACKET_SUCCESS:
2451 * Success received for something. For now we can have only
2452 * one protocol for connection executing at once hence this
2453 * success message is for whatever protocol is executing currently.
2455 if (packet->flags & SILC_PACKET_FLAG_LIST)
2458 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2461 case SILC_PACKET_FAILURE:
2463 * Failure received for something. For now we can have only
2464 * one protocol for connection executing at once hence this
2465 * failure message is for whatever protocol is executing currently.
2467 if (packet->flags & SILC_PACKET_FLAG_LIST)
2469 if (sock->protocol) {
2470 SilcServerFailureContext f;
2471 f = silc_calloc(1, sizeof(*f));
2472 f->sock = silc_socket_dup(sock);
2474 /* We will wait 5 seconds to process this failure packet */
2475 silc_schedule_task_add(server->schedule, sock->sock,
2476 silc_server_failure_callback, (void *)f, 5, 0,
2477 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2481 case SILC_PACKET_REJECT:
2482 if (packet->flags & SILC_PACKET_FLAG_LIST)
2487 case SILC_PACKET_NOTIFY:
2489 * Received notify packet. Server can receive notify packets from
2490 * router. Server then relays the notify messages to clients if needed.
2492 if (packet->flags & SILC_PACKET_FLAG_LIST)
2493 silc_server_notify_list(server, sock, packet);
2495 silc_server_notify(server, sock, packet);
2501 case SILC_PACKET_CHANNEL_MESSAGE:
2503 * Received channel message. Channel messages are special packets
2504 * (although probably most common ones) thus they are handled
2507 if (packet->flags & SILC_PACKET_FLAG_LIST)
2509 idata->last_receive = time(NULL);
2510 silc_server_channel_message(server, sock, packet);
2513 case SILC_PACKET_CHANNEL_KEY:
2515 * Received key for channel. As channels are created by the router
2516 * the keys are as well. We will distribute the key to all of our
2517 * locally connected clients on the particular channel. Router
2518 * never receives this channel and thus is ignored.
2520 if (packet->flags & SILC_PACKET_FLAG_LIST)
2522 silc_server_channel_key(server, sock, packet);
2528 case SILC_PACKET_COMMAND:
2530 * Recived command. Processes the command request and allocates the
2531 * command context and calls the command.
2533 if (packet->flags & SILC_PACKET_FLAG_LIST)
2535 silc_server_command_process(server, sock, packet);
2538 case SILC_PACKET_COMMAND_REPLY:
2540 * Received command reply packet. Received command reply to command. It
2541 * may be reply to command sent by us or reply to command sent by client
2542 * that we've routed further.
2544 if (packet->flags & SILC_PACKET_FLAG_LIST)
2546 silc_server_command_reply(server, sock, packet);
2550 * Private Message packets
2552 case SILC_PACKET_PRIVATE_MESSAGE:
2554 * Received private message packet. The packet is coming from either
2557 if (packet->flags & SILC_PACKET_FLAG_LIST)
2559 idata->last_receive = time(NULL);
2560 silc_server_private_message(server, sock, packet);
2563 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2565 * Private message key packet.
2567 if (packet->flags & SILC_PACKET_FLAG_LIST)
2569 silc_server_private_message_key(server, sock, packet);
2573 * Key Exchange protocol packets
2575 case SILC_PACKET_KEY_EXCHANGE:
2576 if (packet->flags & SILC_PACKET_FLAG_LIST)
2579 if (sock->protocol && sock->protocol->protocol &&
2580 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2581 SilcServerKEInternalContext *proto_ctx =
2582 (SilcServerKEInternalContext *)sock->protocol->context;
2584 proto_ctx->packet = silc_packet_context_dup(packet);
2586 /* Let the protocol handle the packet */
2587 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2589 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2590 "protocol active, packet dropped."));
2594 case SILC_PACKET_KEY_EXCHANGE_1:
2595 if (packet->flags & SILC_PACKET_FLAG_LIST)
2598 if (sock->protocol && sock->protocol->protocol &&
2599 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2600 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2602 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2603 SilcServerRekeyInternalContext *proto_ctx =
2604 (SilcServerRekeyInternalContext *)sock->protocol->context;
2606 if (proto_ctx->packet)
2607 silc_packet_context_free(proto_ctx->packet);
2609 proto_ctx->packet = silc_packet_context_dup(packet);
2611 /* Let the protocol handle the packet */
2612 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2614 SilcServerKEInternalContext *proto_ctx =
2615 (SilcServerKEInternalContext *)sock->protocol->context;
2617 if (proto_ctx->packet)
2618 silc_packet_context_free(proto_ctx->packet);
2620 proto_ctx->packet = silc_packet_context_dup(packet);
2621 proto_ctx->dest_id_type = packet->src_id_type;
2622 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2623 packet->src_id_type);
2624 if (!proto_ctx->dest_id)
2627 /* Let the protocol handle the packet */
2628 silc_protocol_execute(sock->protocol, server->schedule,
2632 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2633 "protocol active, packet dropped."));
2637 case SILC_PACKET_KEY_EXCHANGE_2:
2638 if (packet->flags & SILC_PACKET_FLAG_LIST)
2641 if (sock->protocol && sock->protocol->protocol &&
2642 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2643 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2645 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2646 SilcServerRekeyInternalContext *proto_ctx =
2647 (SilcServerRekeyInternalContext *)sock->protocol->context;
2649 if (proto_ctx->packet)
2650 silc_packet_context_free(proto_ctx->packet);
2652 proto_ctx->packet = silc_packet_context_dup(packet);
2654 /* Let the protocol handle the packet */
2655 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2657 SilcServerKEInternalContext *proto_ctx =
2658 (SilcServerKEInternalContext *)sock->protocol->context;
2660 if (proto_ctx->packet)
2661 silc_packet_context_free(proto_ctx->packet);
2663 proto_ctx->packet = silc_packet_context_dup(packet);
2664 proto_ctx->dest_id_type = packet->src_id_type;
2665 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2666 packet->src_id_type);
2667 if (!proto_ctx->dest_id)
2670 /* Let the protocol handle the packet */
2671 silc_protocol_execute(sock->protocol, server->schedule,
2675 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2676 "protocol active, packet dropped."));
2680 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2682 * Connection authentication request packet. When we receive this packet
2683 * we will send to the other end information about our mandatory
2684 * authentication method for the connection. This packet maybe received
2687 if (packet->flags & SILC_PACKET_FLAG_LIST)
2689 silc_server_connection_auth_request(server, sock, packet);
2693 * Connection Authentication protocol packets
2695 case SILC_PACKET_CONNECTION_AUTH:
2696 /* Start of the authentication protocol. We receive here the
2697 authentication data and will verify it. */
2698 if (packet->flags & SILC_PACKET_FLAG_LIST)
2701 if (sock->protocol && sock->protocol->protocol->type
2702 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2704 SilcServerConnAuthInternalContext *proto_ctx =
2705 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2707 proto_ctx->packet = silc_packet_context_dup(packet);
2709 /* Let the protocol handle the packet */
2710 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2712 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2713 "protocol active, packet dropped."));
2717 case SILC_PACKET_NEW_ID:
2719 * Received New ID packet. This includes some new ID that has been
2720 * created. It may be for client, server or channel. This is the way
2721 * to distribute information about new registered entities in the
2724 if (packet->flags & SILC_PACKET_FLAG_LIST)
2725 silc_server_new_id_list(server, sock, packet);
2727 silc_server_new_id(server, sock, packet);
2730 case SILC_PACKET_NEW_CLIENT:
2732 * Received new client packet. This includes client information that
2733 * we will use to create initial client ID. After creating new
2734 * ID we will send it to the client.
2736 if (packet->flags & SILC_PACKET_FLAG_LIST)
2738 silc_server_new_client(server, sock, packet);
2741 case SILC_PACKET_NEW_SERVER:
2743 * Received new server packet. This includes Server ID and some other
2744 * information that we may save. This is received after server has
2747 if (packet->flags & SILC_PACKET_FLAG_LIST)
2749 silc_server_new_server(server, sock, packet);
2752 case SILC_PACKET_NEW_CHANNEL:
2754 * Received new channel packet. Information about new channel in the
2755 * network are distributed using this packet.
2757 if (packet->flags & SILC_PACKET_FLAG_LIST)
2758 silc_server_new_channel_list(server, sock, packet);
2760 silc_server_new_channel(server, sock, packet);
2763 case SILC_PACKET_HEARTBEAT:
2765 * Received heartbeat.
2767 if (packet->flags & SILC_PACKET_FLAG_LIST)
2771 case SILC_PACKET_KEY_AGREEMENT:
2773 * Received heartbeat.
2775 if (packet->flags & SILC_PACKET_FLAG_LIST)
2777 silc_server_key_agreement(server, sock, packet);
2780 case SILC_PACKET_REKEY:
2782 * Received re-key packet. The sender wants to regenerate the session
2785 if (packet->flags & SILC_PACKET_FLAG_LIST)
2787 silc_server_rekey(server, sock, packet);
2790 case SILC_PACKET_REKEY_DONE:
2792 * The re-key is done.
2794 if (packet->flags & SILC_PACKET_FLAG_LIST)
2797 if (sock->protocol && sock->protocol->protocol &&
2798 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2800 SilcServerRekeyInternalContext *proto_ctx =
2801 (SilcServerRekeyInternalContext *)sock->protocol->context;
2803 if (proto_ctx->packet)
2804 silc_packet_context_free(proto_ctx->packet);
2806 proto_ctx->packet = silc_packet_context_dup(packet);
2808 /* Let the protocol handle the packet */
2809 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2811 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2812 "protocol active, packet dropped."));
2816 case SILC_PACKET_FTP:
2818 if (packet->flags & SILC_PACKET_FLAG_LIST)
2820 silc_server_ftp(server, sock, packet);
2823 case SILC_PACKET_RESUME_CLIENT:
2825 if (packet->flags & SILC_PACKET_FLAG_LIST)
2827 silc_server_resume_client(server, sock, packet);
2830 case SILC_PACKET_RESUME_ROUTER:
2831 /* Resume router packet received. This packet is received for backup
2832 router resuming protocol. */
2833 if (packet->flags & SILC_PACKET_FLAG_LIST)
2835 silc_server_backup_resume_router(server, sock, packet);
2839 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2844 /* Creates connection to a remote router. */
2846 void silc_server_create_connection(SilcServer server,
2847 const char *remote_host, SilcUInt32 port)
2849 SilcServerConnection sconn;
2851 /* Allocate connection object for hold connection specific stuff. */
2852 sconn = silc_calloc(1, sizeof(*sconn));
2853 sconn->remote_host = strdup(remote_host);
2854 sconn->remote_port = port;
2855 sconn->no_reconnect = TRUE;
2857 silc_schedule_task_add(server->schedule, 0,
2858 silc_server_connect_router,
2859 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2860 SILC_TASK_PRI_NORMAL);
2863 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2865 silc_socket_free(context);
2868 /* Closes connection to socket connection */
2870 void silc_server_close_connection(SilcServer server,
2871 SilcSocketConnection sock)
2875 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2876 silc_schedule_task_add(server->schedule, 0,
2877 silc_server_close_connection_final,
2878 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2879 SILC_TASK_PRI_NORMAL);
2883 memset(tmp, 0, sizeof(tmp));
2884 silc_socket_get_error(sock, tmp, sizeof(tmp));
2885 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2887 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2888 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2889 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2890 "Router"), tmp[0] ? tmp : ""));
2892 /* We won't listen for this connection anymore */
2893 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2895 /* Unregister all tasks */
2896 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2898 /* Close the actual connection */
2899 silc_net_close_connection(sock->sock);
2900 server->sockets[sock->sock] = NULL;
2902 /* If sock->user_data is NULL then we'll check for active protocols
2903 here since the silc_server_free_sock_user_data has not been called
2904 for this connection. */
2905 if (!sock->user_data) {
2906 /* If any protocol is active cancel its execution. It will call
2907 the final callback which will finalize the disconnection. */
2908 if (sock->protocol) {
2909 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2910 silc_protocol_cancel(sock->protocol, server->schedule);
2911 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2912 silc_protocol_execute_final(sock->protocol, server->schedule);
2913 sock->protocol = NULL;
2918 silc_schedule_task_add(server->schedule, 0,
2919 silc_server_close_connection_final,
2920 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2921 SILC_TASK_PRI_NORMAL);
2924 /* Sends disconnect message to remote connection and disconnects the
2927 void silc_server_disconnect_remote(SilcServer server,
2928 SilcSocketConnection sock,
2929 SilcStatus status, ...)
2932 unsigned char buf[512];
2940 memset(buf, 0, sizeof(buf));
2941 va_start(ap, status);
2942 cp = va_arg(ap, char *);
2944 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2949 SILC_LOG_DEBUG(("Disconnecting remote host"));
2951 /* Notify remote end that the conversation is over. The notify message
2952 is tried to be sent immediately. */
2956 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2958 buffer = silc_buffer_alloc_size(len);
2962 buffer->data[0] = status;
2964 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2966 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2967 buffer->data, buffer->len, TRUE);
2968 silc_buffer_free(buffer);
2971 silc_server_packet_queue_purge(server, sock);
2973 /* Mark the connection to be disconnected */
2974 SILC_SET_DISCONNECTED(sock);
2975 silc_server_close_connection(server, sock);
2978 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2980 SilcServer server = app_context;
2981 SilcClientEntry client = context;
2983 assert(!silc_hash_table_count(client->channels));
2985 silc_idlist_del_data(client);
2986 silc_idcache_purge_by_context(server->local_list->clients, client);
2989 /* Frees client data and notifies about client's signoff. */
2991 void silc_server_free_client_data(SilcServer server,
2992 SilcSocketConnection sock,
2993 SilcClientEntry client,
2995 const char *signoff)
2997 SILC_LOG_DEBUG(("Freeing client data"));
2999 /* If there is pending outgoing data for the client then purge it
3000 to the network before removing the client entry. */
3001 silc_server_packet_queue_purge(server, sock);
3004 /* Check if anyone is watching this nickname */
3005 if (server->server_type == SILC_ROUTER)
3006 silc_server_check_watcher_list(server, client, NULL,
3007 SILC_NOTIFY_TYPE_SIGNOFF);
3009 /* Send SIGNOFF notify to routers. */
3011 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3012 SILC_BROADCAST(server), client->id,
3016 /* Remove client from all channels */
3018 silc_server_remove_from_channels(server, NULL, client,
3019 TRUE, (char *)signoff, TRUE);
3021 silc_server_remove_from_channels(server, NULL, client,
3022 FALSE, NULL, FALSE);
3024 /* Remove this client from watcher list if it is */
3025 silc_server_del_from_watcher_list(server, client);
3027 /* Update statistics */
3028 server->stat.my_clients--;
3029 server->stat.clients--;
3030 if (server->stat.cell_clients)
3031 server->stat.cell_clients--;
3032 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3033 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3034 silc_schedule_task_del_by_context(server->schedule, client);
3036 /* We will not delete the client entry right away. We will take it
3037 into history (for WHOWAS command) for 5 minutes, unless we're
3038 shutting down server. */
3039 if (!server->server_shutdown) {
3040 silc_schedule_task_add(server->schedule, 0,
3041 silc_server_free_client_data_timeout,
3043 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3044 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3045 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3047 client->router = NULL;
3048 client->connection = NULL;
3050 /* Delete directly since we're shutting down server */
3051 silc_idlist_del_data(client);
3052 silc_idlist_del_client(server->local_list, client);
3056 /* Frees user_data pointer from socket connection object. This also sends
3057 appropriate notify packets to the network to inform about leaving
3060 void silc_server_free_sock_user_data(SilcServer server,
3061 SilcSocketConnection sock,
3062 const char *signoff_message)
3064 switch (sock->type) {
3065 case SILC_SOCKET_TYPE_CLIENT:
3067 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3068 silc_server_free_client_data(server, sock, user_data, TRUE,
3072 case SILC_SOCKET_TYPE_SERVER:
3073 case SILC_SOCKET_TYPE_ROUTER:
3075 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3076 SilcServerEntry backup_router = NULL;
3078 SILC_LOG_DEBUG(("Freeing server data"));
3081 backup_router = silc_server_backup_get(server, user_data->id);
3083 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3084 backup_router == server->id_entry &&
3085 sock->type != SILC_SOCKET_TYPE_ROUTER)
3086 backup_router = NULL;
3088 if (server->server_shutdown)
3089 backup_router = NULL;
3091 /* If this was our primary router connection then we're lost to
3092 the outside world. */
3093 if (server->router == user_data) {
3094 /* Check whether we have a backup router connection */
3095 if (!backup_router || backup_router == user_data) {
3096 silc_schedule_task_add(server->schedule, 0,
3097 silc_server_connect_to_router,
3100 SILC_TASK_PRI_NORMAL);
3102 server->id_entry->router = NULL;
3103 server->router = NULL;
3104 server->standalone = TRUE;
3105 backup_router = NULL;
3107 if (server->id_entry != backup_router) {
3108 SILC_LOG_INFO(("New primary router is backup router %s",
3109 backup_router->server_name));
3110 server->id_entry->router = backup_router;
3111 server->router = backup_router;
3112 server->router_connect = time(0);
3113 server->backup_primary = TRUE;
3115 SILC_LOG_INFO(("We are now new primary router in this cell"));
3116 server->id_entry->router = NULL;
3117 server->router = NULL;
3118 server->standalone = TRUE;
3120 /* We stop here to take a breath */
3124 if (server->server_type == SILC_BACKUP_ROUTER) {
3125 server->server_type = SILC_ROUTER;
3127 /* We'll need to constantly try to reconnect to the primary
3128 router so that we'll see when it comes back online. */
3129 silc_server_backup_reconnect(server, sock->ip, sock->port,
3130 silc_server_backup_connected,
3134 /* Mark this connection as replaced */
3135 silc_server_backup_replaced_add(server, user_data->id,
3138 } else if (backup_router) {
3139 SILC_LOG_INFO(("Enabling the use of backup router %s",
3140 backup_router->server_name));
3141 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3142 backup_router->server_name));
3144 /* Mark this connection as replaced */
3145 silc_server_backup_replaced_add(server, user_data->id,
3149 if (!backup_router) {
3150 /* Remove all servers that are originated from this server, and
3151 remove the clients of those servers too. */
3152 silc_server_remove_servers_by_server(server, user_data, TRUE);
3154 /* Remove the clients that this server owns as they will become
3155 invalid now too. For backup router the server is actually
3156 coming from the primary router, so mark that as the owner
3158 if (server->server_type == SILC_BACKUP_ROUTER &&
3159 sock->type == SILC_SOCKET_TYPE_SERVER)
3160 silc_server_remove_clients_by_server(server, server->router,
3163 silc_server_remove_clients_by_server(server, user_data,
3166 /* Remove channels owned by this server */
3167 if (server->server_type == SILC_SERVER)
3168 silc_server_remove_channels_by_server(server, user_data);
3170 /* Enable local server connections that may be disabled */
3171 silc_server_local_servers_toggle_enabled(server, TRUE);
3173 /* Update the client entries of this server to the new backup
3174 router. If we are the backup router we also resolve the real
3175 servers for the clients. After updating is over this also
3176 removes the clients that this server explicitly owns. */
3177 silc_server_update_clients_by_server(server, user_data,
3178 backup_router, TRUE);
3180 /* If we are router and just lost our primary router (now standlaone)
3181 we remove everything that was behind it, since we don't know
3183 if (server->server_type == SILC_ROUTER && server->standalone)
3184 /* Remove all servers that are originated from this server, and
3185 remove the clients of those servers too. */
3186 silc_server_remove_servers_by_server(server, user_data, TRUE);
3188 /* Finally remove the clients that are explicitly owned by this
3189 server. They go down with the server. */
3190 silc_server_remove_clients_by_server(server, user_data,
3193 /* Update our server cache to use the new backup router too. */
3194 silc_server_update_servers_by_server(server, user_data, backup_router);
3195 if (server->server_type == SILC_SERVER)
3196 silc_server_update_channels_by_server(server, user_data,
3199 /* Send notify about primary router going down to local operators */
3200 if (server->backup_router)
3201 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3202 SILC_NOTIFY_TYPE_NONE,
3203 ("%s switched to backup router %s "
3204 "(we are primary router now)",
3205 server->server_name, server->server_name));
3206 else if (server->router)
3207 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3208 SILC_NOTIFY_TYPE_NONE,
3209 ("%s switched to backup router %s",
3210 server->server_name,
3211 server->router->server_name));
3214 /* Free the server entry */
3215 silc_server_backup_del(server, user_data);
3216 silc_server_backup_replaced_del(server, user_data);
3217 silc_idlist_del_data(user_data);
3218 if (!silc_idlist_del_server(server->local_list, user_data))
3219 silc_idlist_del_server(server->global_list, user_data);
3220 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3221 server->stat.my_servers--;
3223 server->stat.my_routers--;
3224 server->stat.routers--;
3226 server->stat.servers--;
3227 if (server->server_type == SILC_ROUTER)
3228 server->stat.cell_servers--;
3230 if (backup_router && backup_router != server->id_entry) {
3231 /* Announce all of our stuff that was created about 5 minutes ago.
3232 The backup router knows all the other stuff already. */
3233 if (server->server_type == SILC_ROUTER)
3234 silc_server_announce_servers(server, FALSE, time(0) - 300,
3235 backup_router->connection);
3237 /* Announce our clients and channels to the router */
3238 silc_server_announce_clients(server, time(0) - 300,
3239 backup_router->connection);
3240 silc_server_announce_channels(server, time(0) - 300,
3241 backup_router->connection);
3247 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3249 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3251 silc_idlist_del_data(user_data);
3252 silc_free(user_data);
3257 /* If any protocol is active cancel its execution */
3258 if (sock->protocol) {
3259 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3260 silc_protocol_cancel(sock->protocol, server->schedule);
3261 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3262 silc_protocol_execute_final(sock->protocol, server->schedule);
3263 sock->protocol = NULL;
3266 sock->user_data = NULL;
3269 /* Removes client from all channels it has joined. This is used when client
3270 connection is disconnected. If the client on a channel is last, the
3271 channel is removed as well. This sends the SIGNOFF notify types. */
3273 void silc_server_remove_from_channels(SilcServer server,
3274 SilcSocketConnection sock,
3275 SilcClientEntry client,
3277 const char *signoff_message,
3280 SilcChannelEntry channel;
3281 SilcChannelClientEntry chl;
3282 SilcHashTableList htl;
3283 SilcBuffer clidp = NULL;
3288 SILC_LOG_DEBUG(("Removing client from joined channels"));
3290 if (notify && !client->id)
3294 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3299 /* Remove the client from all channels. The client is removed from
3300 the channels' user list. */
3301 silc_hash_table_list(client->channels, &htl);
3302 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3303 channel = chl->channel;
3305 /* Remove channel if this is last client leaving the channel, unless
3306 the channel is permanent. */
3307 if (server->server_type != SILC_SERVER &&
3308 silc_hash_table_count(channel->user_list) < 2) {
3309 silc_server_channel_delete(server, channel);
3313 silc_hash_table_del(client->channels, channel);
3314 silc_hash_table_del(channel->user_list, chl->client);
3315 channel->user_count--;
3317 /* If there is no global users on the channel anymore mark the channel
3318 as local channel. Do not check if the removed client is local client. */
3319 if (server->server_type == SILC_SERVER && channel->global_users &&
3320 chl->client->router && !silc_server_channel_has_global(channel))
3321 channel->global_users = FALSE;
3325 /* Update statistics */
3326 if (SILC_IS_LOCAL(client))
3327 server->stat.my_chanclients--;
3328 if (server->server_type == SILC_ROUTER) {
3329 server->stat.cell_chanclients--;
3330 server->stat.chanclients--;
3333 /* If there is not at least one local user on the channel then we don't
3334 need the channel entry anymore, we can remove it safely, unless the
3335 channel is permanent channel */
3336 if (server->server_type == SILC_SERVER &&
3337 !silc_server_channel_has_local(channel)) {
3338 /* Notify about leaving client if this channel has global users. */
3339 if (notify && channel->global_users)
3340 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3341 SILC_NOTIFY_TYPE_SIGNOFF,
3342 signoff_message ? 2 : 1,
3343 clidp->data, clidp->len,
3344 signoff_message, signoff_message ?
3345 strlen(signoff_message) : 0);
3347 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3348 silc_server_channel_delete(server, channel);
3352 /* Send notify to channel about client leaving SILC and channel too */
3354 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3355 SILC_NOTIFY_TYPE_SIGNOFF,
3356 signoff_message ? 2 : 1,
3357 clidp->data, clidp->len,
3358 signoff_message, signoff_message ?
3359 strlen(signoff_message) : 0);
3361 /* Don't create keys if we are shutting down */
3362 if (server->server_shutdown)
3365 /* Re-generate channel key if needed */
3366 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3367 if (!silc_server_create_channel_key(server, channel, 0))
3370 /* Send the channel key to the channel. The key of course is not sent
3371 to the client who was removed from the channel. */
3372 silc_server_send_channel_key(server, client->connection, channel,
3373 server->server_type == SILC_ROUTER ?
3374 FALSE : !server->standalone);
3378 silc_hash_table_list_reset(&htl);
3380 silc_buffer_free(clidp);
3383 /* Removes client from one channel. This is used for example when client
3384 calls LEAVE command to remove itself from the channel. Returns TRUE
3385 if channel still exists and FALSE if the channel is removed when
3386 last client leaves the channel. If `notify' is FALSE notify messages
3389 bool silc_server_remove_from_one_channel(SilcServer server,
3390 SilcSocketConnection sock,
3391 SilcChannelEntry channel,
3392 SilcClientEntry client,
3395 SilcChannelClientEntry chl;
3398 SILC_LOG_DEBUG(("Removing %s from channel %s",
3399 silc_id_render(client->id, SILC_ID_CLIENT),
3400 channel->channel_name));
3402 /* Get the entry to the channel, if this client is not on the channel
3404 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3407 /* Remove channel if this is last client leaving the channel, unless
3408 the channel is permanent. */
3409 if (server->server_type != SILC_SERVER &&
3410 silc_hash_table_count(channel->user_list) < 2) {
3411 silc_server_channel_delete(server, channel);
3415 silc_hash_table_del(client->channels, chl->channel);
3416 silc_hash_table_del(channel->user_list, chl->client);
3417 channel->user_count--;
3419 /* If there is no global users on the channel anymore mark the channel
3420 as local channel. Do not check if the client is local client. */
3421 if (server->server_type == SILC_SERVER && channel->global_users &&
3422 chl->client->router && !silc_server_channel_has_global(channel))
3423 channel->global_users = FALSE;
3427 /* Update statistics */
3428 if (SILC_IS_LOCAL(client))
3429 server->stat.my_chanclients--;
3430 if (server->server_type == SILC_ROUTER) {
3431 server->stat.cell_chanclients--;
3432 server->stat.chanclients--;
3435 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3439 /* If there is not at least one local user on the channel then we don't
3440 need the channel entry anymore, we can remove it safely, unless the
3441 channel is permanent channel */
3442 if (server->server_type == SILC_SERVER &&
3443 !silc_server_channel_has_local(channel)) {
3444 /* Notify about leaving client if this channel has global users. */
3445 if (notify && channel->global_users)
3446 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3447 SILC_NOTIFY_TYPE_LEAVE, 1,
3448 clidp->data, clidp->len);
3450 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3451 silc_server_channel_delete(server, channel);
3452 silc_buffer_free(clidp);
3456 /* Send notify to channel about client leaving the channel */
3458 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3459 SILC_NOTIFY_TYPE_LEAVE, 1,
3460 clidp->data, clidp->len);
3462 silc_buffer_free(clidp);
3466 /* Timeout callback. This is called if connection is idle or for some
3467 other reason is not responding within some period of time. This
3468 disconnects the remote end. */
3470 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3472 SilcServer server = (SilcServer)context;
3473 SilcSocketConnection sock = server->sockets[fd];
3474 SilcProtocolType protocol = 0;
3476 SILC_LOG_DEBUG(("Start"));
3481 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3482 sock->hostname, sock->ip));
3484 /* If we have protocol active we must assure that we call the protocol's
3485 final callback so that all the memory is freed. */
3486 if (sock->protocol) {
3487 protocol = sock->protocol->protocol->type;
3488 silc_protocol_cancel(sock->protocol, server->schedule);
3489 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3490 silc_protocol_execute_final(sock->protocol, server->schedule);
3491 sock->protocol = NULL;
3495 if (sock->user_data)
3496 silc_server_free_sock_user_data(server, sock, NULL);
3498 silc_server_disconnect_remote(server, sock,
3500 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3501 SILC_STATUS_ERR_AUTH_FAILED :
3502 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3503 "Connection timeout");
3506 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3507 function may be used only by router. In real SILC network all channels
3508 are created by routers thus this function is never used by normal
3511 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3512 SilcServerID *router_id,
3518 SilcChannelID *channel_id;
3519 SilcChannelEntry entry;
3523 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3526 cipher = SILC_DEFAULT_CIPHER;
3528 hmac = SILC_DEFAULT_HMAC;
3530 /* Allocate cipher */
3531 if (!silc_cipher_alloc(cipher, &key))
3535 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3536 silc_cipher_free(key);
3540 channel_name = strdup(channel_name);
3542 /* Create the channel ID */
3543 if (!silc_id_create_channel_id(server, router_id, server->rng,
3545 silc_free(channel_name);
3546 silc_cipher_free(key);
3547 silc_hmac_free(newhmac);
3551 /* Create the channel */
3552 entry = silc_idlist_add_channel(server->local_list, channel_name,
3553 SILC_CHANNEL_MODE_NONE, channel_id,
3554 NULL, key, newhmac, 0);
3556 silc_free(channel_name);
3557 silc_cipher_free(key);
3558 silc_hmac_free(newhmac);
3559 silc_free(channel_id);
3563 entry->cipher = strdup(cipher);
3564 entry->hmac_name = strdup(hmac);
3566 /* Now create the actual key material */
3567 if (!silc_server_create_channel_key(server, entry,
3568 silc_cipher_get_key_len(key) / 8)) {
3569 silc_idlist_del_channel(server->local_list, entry);
3573 /* Notify other routers about the new channel. We send the packet
3574 to our primary route. */
3576 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3577 channel_name, entry->id,
3578 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3581 /* Distribute to backup routers */
3582 if (broadcast && server->server_type == SILC_ROUTER) {
3585 SilcUInt32 name_len = strlen(channel_name);
3586 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3587 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3589 packet = silc_channel_payload_encode(channel_name, name_len,
3590 cid, channel_id_len, entry->mode);
3591 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3592 packet->data, packet->len, FALSE, TRUE);
3594 silc_buffer_free(packet);
3597 server->stat.my_channels++;
3598 if (server->server_type == SILC_ROUTER) {
3599 server->stat.channels++;
3600 server->stat.cell_channels++;
3601 entry->users_resolved = TRUE;
3607 /* Same as above but creates the channel with Channel ID `channel_id. */
3610 silc_server_create_new_channel_with_id(SilcServer server,
3614 SilcChannelID *channel_id,
3617 SilcChannelEntry entry;
3621 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3624 cipher = SILC_DEFAULT_CIPHER;
3626 hmac = SILC_DEFAULT_HMAC;
3628 /* Allocate cipher */
3629 if (!silc_cipher_alloc(cipher, &key))
3633 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3634 silc_cipher_free(key);
3638 channel_name = strdup(channel_name);
3640 /* Create the channel */
3641 entry = silc_idlist_add_channel(server->local_list, channel_name,
3642 SILC_CHANNEL_MODE_NONE, channel_id,
3643 NULL, key, newhmac, 0);
3645 silc_cipher_free(key);
3646 silc_hmac_free(newhmac);
3647 silc_free(channel_name);
3651 /* Now create the actual key material */
3652 if (!silc_server_create_channel_key(server, entry,
3653 silc_cipher_get_key_len(key) / 8)) {
3654 silc_idlist_del_channel(server->local_list, entry);
3658 /* Notify other routers about the new channel. We send the packet
3659 to our primary route. */
3661 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3662 channel_name, entry->id,
3663 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3666 /* Distribute to backup routers */
3667 if (broadcast && server->server_type == SILC_ROUTER) {
3670 SilcUInt32 name_len = strlen(channel_name);
3671 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3672 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3674 packet = silc_channel_payload_encode(channel_name, name_len,
3675 cid, channel_id_len, entry->mode);
3676 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3677 packet->data, packet->len, FALSE, TRUE);
3679 silc_buffer_free(packet);
3682 server->stat.my_channels++;
3683 if (server->server_type == SILC_ROUTER) {
3684 server->stat.channels++;
3685 server->stat.cell_channels++;
3686 entry->users_resolved = TRUE;
3692 /* Channel's key re-key timeout callback. */
3694 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3696 SilcServer server = app_context;
3697 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3701 /* Return now if we are shutting down */
3702 if (server->server_shutdown)
3705 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3708 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3711 /* Generates new channel key. This is used to create the initial channel key
3712 but also to re-generate new key for channel. If `key_len' is provided
3713 it is the bytes of the key length. */
3715 bool silc_server_create_channel_key(SilcServer server,
3716 SilcChannelEntry channel,
3720 unsigned char channel_key[32], hash[32];
3723 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3724 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3728 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3730 if (!channel->channel_key)
3731 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3732 channel->channel_key = NULL;
3738 else if (channel->key_len)
3739 len = channel->key_len / 8;
3741 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3743 /* Create channel key */
3744 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3747 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3749 /* Remove old key if exists */
3751 memset(channel->key, 0, channel->key_len / 8);
3752 silc_free(channel->key);
3756 channel->key_len = len * 8;
3757 channel->key = silc_memdup(channel_key, len);
3758 memset(channel_key, 0, sizeof(channel_key));
3760 /* Generate HMAC key from the channel key data and set it */
3762 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3763 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3764 silc_hmac_set_key(channel->hmac, hash,
3765 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3766 memset(hash, 0, sizeof(hash));
3768 if (server->server_type == SILC_ROUTER) {
3769 if (!channel->rekey)
3770 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3771 channel->rekey->channel = channel;
3772 channel->rekey->key_len = key_len;
3773 if (channel->rekey->task)
3774 silc_schedule_task_del(server->schedule, channel->rekey->task);
3776 channel->rekey->task =
3777 silc_schedule_task_add(server->schedule, 0,
3778 silc_server_channel_key_rekey,
3779 (void *)channel->rekey,
3780 server->config->channel_rekey_secs, 0,
3782 SILC_TASK_PRI_NORMAL);
3788 /* Saves the channel key found in the encoded `key_payload' buffer. This
3789 function is used when we receive Channel Key Payload and also when we're
3790 processing JOIN command reply. Returns entry to the channel. */
3792 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3793 SilcBuffer key_payload,
3794 SilcChannelEntry channel)
3796 SilcChannelKeyPayload payload = NULL;
3797 SilcChannelID *id = NULL;
3798 unsigned char *tmp, hash[32];
3802 /* Decode channel key payload */
3803 payload = silc_channel_key_payload_parse(key_payload->data,
3806 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3811 /* Get the channel entry */
3814 /* Get channel ID */
3815 tmp = silc_channel_key_get_id(payload, &tmp_len);
3816 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3822 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3824 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3826 if (server->server_type == SILC_ROUTER)
3827 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3828 silc_id_render(id, SILC_ID_CHANNEL)));
3834 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3836 tmp = silc_channel_key_get_key(payload, &tmp_len);
3842 cipher = silc_channel_key_get_cipher(payload, NULL);
3848 /* Remove old key if exists */
3850 memset(channel->key, 0, channel->key_len / 8);
3851 silc_free(channel->key);
3852 silc_cipher_free(channel->channel_key);
3855 /* Create new cipher */
3856 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3857 channel->channel_key = NULL;
3862 if (channel->cipher)
3863 silc_free(channel->cipher);
3864 channel->cipher = strdup(cipher);
3867 channel->key_len = tmp_len * 8;
3868 channel->key = silc_memdup(tmp, tmp_len);
3869 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3871 /* Generate HMAC key from the channel key data and set it */
3873 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3874 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3875 silc_hmac_set_key(channel->hmac, hash,
3876 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3878 memset(hash, 0, sizeof(hash));
3879 memset(tmp, 0, tmp_len);
3881 if (server->server_type == SILC_ROUTER) {
3882 if (!channel->rekey)
3883 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3884 channel->rekey->channel = channel;
3885 if (channel->rekey->task)
3886 silc_schedule_task_del(server->schedule, channel->rekey->task);
3888 channel->rekey->task =
3889 silc_schedule_task_add(server->schedule, 0,
3890 silc_server_channel_key_rekey,
3891 (void *)channel->rekey,
3892 server->config->channel_rekey_secs, 0,
3894 SILC_TASK_PRI_NORMAL);
3900 silc_channel_key_payload_free(payload);
3905 /* Heartbeat callback. This function is set as argument for the
3906 silc_socket_set_heartbeat function. The library will call this function
3907 at the set time interval. */
3909 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3912 SilcServer server = hb_context;
3914 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3915 sock->port, sock->ip));
3917 /* Send the heartbeat */
3918 silc_server_send_heartbeat(server, sock);
3921 /* Returns assembled of all servers in the given ID list. The packet's
3922 form is dictated by the New ID payload. */
3924 static void silc_server_announce_get_servers(SilcServer server,
3925 SilcServerEntry remote,
3927 SilcBuffer *servers,
3928 unsigned long creation_time)
3930 SilcIDCacheList list;
3931 SilcIDCacheEntry id_cache;
3932 SilcServerEntry entry;
3935 /* Go through all clients in the list */
3936 if (silc_idcache_get_all(id_list->servers, &list)) {
3937 if (silc_idcache_list_first(list, &id_cache)) {
3939 entry = (SilcServerEntry)id_cache->context;
3941 /* Do not announce the one we've sending our announcements and
3942 do not announce ourself. Also check the creation time if it's
3944 if ((entry == remote) || (entry == server->id_entry) ||
3945 (creation_time && entry->data.created < creation_time)) {
3946 if (!silc_idcache_list_next(list, &id_cache))
3951 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3953 *servers = silc_buffer_realloc(*servers,
3955 (*servers)->truelen + idp->len :
3957 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3958 silc_buffer_put(*servers, idp->data, idp->len);
3959 silc_buffer_pull(*servers, idp->len);
3960 silc_buffer_free(idp);
3962 if (!silc_idcache_list_next(list, &id_cache))
3967 silc_idcache_list_free(list);
3972 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3978 p = silc_notify_payload_encode(notify, argc, ap);
3984 /* This function is used by router to announce existing servers to our
3985 primary router when we've connected to it. If `creation_time' is non-zero
3986 then only the servers that has been created after the `creation_time'
3987 will be announced. */
3989 void silc_server_announce_servers(SilcServer server, bool global,
3990 unsigned long creation_time,
3991 SilcSocketConnection remote)
3993 SilcBuffer servers = NULL;
3995 SILC_LOG_DEBUG(("Announcing servers"));
3997 /* Get servers in local list */
3998 silc_server_announce_get_servers(server, remote->user_data,
3999 server->local_list, &servers,
4003 /* Get servers in global list */
4004 silc_server_announce_get_servers(server, remote->user_data,
4005 server->global_list, &servers,
4009 silc_buffer_push(servers, servers->data - servers->head);
4010 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4012 /* Send the packet */
4013 silc_server_packet_send(server, remote,
4014 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4015 servers->data, servers->len, TRUE);
4017 silc_buffer_free(servers);
4021 /* Returns assembled packet of all clients in the given ID list. The
4022 packet's form is dictated by the New ID Payload. */
4024 static void silc_server_announce_get_clients(SilcServer server,
4026 SilcBuffer *clients,
4028 unsigned long creation_time)
4030 SilcIDCacheList list;
4031 SilcIDCacheEntry id_cache;
4032 SilcClientEntry client;
4035 unsigned char mode[4];
4037 /* Go through all clients in the list */
4038 if (silc_idcache_get_all(id_list->clients, &list)) {
4039 if (silc_idcache_list_first(list, &id_cache)) {
4041 client = (SilcClientEntry)id_cache->context;
4043 if (creation_time && client->data.created < creation_time) {
4044 if (!silc_idcache_list_next(list, &id_cache))
4048 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4049 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4050 if (!silc_idcache_list_next(list, &id_cache))
4055 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4057 *clients = silc_buffer_realloc(*clients,
4059 (*clients)->truelen + idp->len :
4061 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4062 silc_buffer_put(*clients, idp->data, idp->len);
4063 silc_buffer_pull(*clients, idp->len);
4065 SILC_PUT32_MSB(client->mode, mode);
4067 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4068 2, idp->data, idp->len,
4070 *umodes = silc_buffer_realloc(*umodes,
4072 (*umodes)->truelen + tmp->len :
4074 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4075 silc_buffer_put(*umodes, tmp->data, tmp->len);
4076 silc_buffer_pull(*umodes, tmp->len);
4077 silc_buffer_free(tmp);
4079 silc_buffer_free(idp);
4081 if (!silc_idcache_list_next(list, &id_cache))
4086 silc_idcache_list_free(list);
4090 /* This function is used to announce our existing clients to our router
4091 when we've connected to it. If `creation_time' is non-zero then only
4092 the clients that has been created after the `creation_time' will be
4095 void silc_server_announce_clients(SilcServer server,
4096 unsigned long creation_time,
4097 SilcSocketConnection remote)
4099 SilcBuffer clients = NULL;
4100 SilcBuffer umodes = NULL;
4102 SILC_LOG_DEBUG(("Announcing clients"));
4104 /* Get clients in local list */
4105 silc_server_announce_get_clients(server, server->local_list,
4106 &clients, &umodes, creation_time);
4108 /* As router we announce our global list as well */
4109 if (server->server_type == SILC_ROUTER)
4110 silc_server_announce_get_clients(server, server->global_list,
4111 &clients, &umodes, creation_time);
4114 silc_buffer_push(clients, clients->data - clients->head);
4115 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4117 /* Send the packet */
4118 silc_server_packet_send(server, remote,
4119 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4120 clients->data, clients->len, TRUE);
4122 silc_buffer_free(clients);
4126 silc_buffer_push(umodes, umodes->data - umodes->head);
4127 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4129 /* Send the packet */
4130 silc_server_packet_send(server, remote,
4131 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4132 umodes->data, umodes->len, TRUE);
4134 silc_buffer_free(umodes);
4138 /* Returns channel's topic for announcing it */
4140 void silc_server_announce_get_channel_topic(SilcServer server,
4141 SilcChannelEntry channel,
4146 if (channel->topic) {
4147 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4148 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4149 chidp->data, chidp->len,
4151 strlen(channel->topic));
4152 silc_buffer_free(chidp);
4156 /* Returns assembled packets for channel users of the `channel'. */
4158 void silc_server_announce_get_channel_users(SilcServer server,
4159 SilcChannelEntry channel,
4160 SilcBuffer *channel_modes,
4161 SilcBuffer *channel_users,
4162 SilcBuffer *channel_users_modes)
4164 SilcChannelClientEntry chl;
4165 SilcHashTableList htl;
4166 SilcBuffer chidp, clidp, csidp;
4169 unsigned char mode[4], *fkey = NULL;
4170 SilcUInt32 fkey_len = 0;
4173 SILC_LOG_DEBUG(("Start"));
4175 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4176 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4179 SILC_PUT32_MSB(channel->mode, mode);
4180 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4181 if (channel->founder_key)
4182 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4184 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4185 6, csidp->data, csidp->len,
4188 hmac, hmac ? strlen(hmac) : 0,
4189 channel->passphrase,
4190 channel->passphrase ?
4191 strlen(channel->passphrase) : 0,
4195 silc_buffer_realloc(*channel_modes,
4197 (*channel_modes)->truelen + len : len));
4198 silc_buffer_pull_tail(*channel_modes,
4199 ((*channel_modes)->end -
4200 (*channel_modes)->data));
4201 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4202 silc_buffer_pull(*channel_modes, len);
4203 silc_buffer_free(tmp);
4208 /* Now find all users on the channel */
4209 silc_hash_table_list(channel->user_list, &htl);
4210 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4211 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4214 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4215 clidp->data, clidp->len,
4216 chidp->data, chidp->len);
4219 silc_buffer_realloc(*channel_users,
4221 (*channel_users)->truelen + len : len));
4222 silc_buffer_pull_tail(*channel_users,
4223 ((*channel_users)->end -
4224 (*channel_users)->data));
4226 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4227 silc_buffer_pull(*channel_users, len);
4228 silc_buffer_free(tmp);
4230 /* CUMODE notify for mode change on the channel */
4231 SILC_PUT32_MSB(chl->mode, mode);
4232 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4233 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4234 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4235 4, csidp->data, csidp->len,
4237 clidp->data, clidp->len,
4240 *channel_users_modes =
4241 silc_buffer_realloc(*channel_users_modes,
4242 (*channel_users_modes ?
4243 (*channel_users_modes)->truelen + len : len));
4244 silc_buffer_pull_tail(*channel_users_modes,
4245 ((*channel_users_modes)->end -
4246 (*channel_users_modes)->data));
4248 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4249 silc_buffer_pull(*channel_users_modes, len);
4250 silc_buffer_free(tmp);
4254 silc_buffer_free(clidp);
4256 silc_hash_table_list_reset(&htl);
4257 silc_buffer_free(chidp);
4258 silc_buffer_free(csidp);
4261 /* Returns assembled packets for all channels and users on those channels
4262 from the given ID List. The packets are in the form dictated by the
4263 New Channel and New Channel User payloads. */
4265 void silc_server_announce_get_channels(SilcServer server,
4267 SilcBuffer *channels,
4268 SilcBuffer **channel_modes,
4269 SilcBuffer *channel_users,
4270 SilcBuffer **channel_users_modes,
4271 SilcUInt32 *channel_users_modes_c,
4272 SilcBuffer **channel_topics,
4273 SilcChannelID ***channel_ids,
4274 unsigned long creation_time)
4276 SilcIDCacheList list;
4277 SilcIDCacheEntry id_cache;
4278 SilcChannelEntry channel;
4281 SilcUInt16 name_len;
4283 int i = *channel_users_modes_c;
4286 SILC_LOG_DEBUG(("Start"));
4288 /* Go through all channels in the list */
4289 if (silc_idcache_get_all(id_list->channels, &list)) {
4290 if (silc_idcache_list_first(list, &id_cache)) {
4292 channel = (SilcChannelEntry)id_cache->context;
4294 if (creation_time && channel->created < creation_time)
4299 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4300 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4301 name_len = strlen(channel->channel_name);
4304 len = 4 + name_len + id_len + 4;
4306 silc_buffer_realloc(*channels,
4307 (*channels ? (*channels)->truelen +
4309 silc_buffer_pull_tail(*channels,
4310 ((*channels)->end - (*channels)->data));
4311 silc_buffer_format(*channels,
4312 SILC_STR_UI_SHORT(name_len),
4313 SILC_STR_UI_XNSTRING(channel->channel_name,
4315 SILC_STR_UI_SHORT(id_len),
4316 SILC_STR_UI_XNSTRING(cid, id_len),
4317 SILC_STR_UI_INT(channel->mode),
4319 silc_buffer_pull(*channels, len);
4322 if (creation_time && channel->updated < creation_time)
4328 /* Channel user modes */
4329 *channel_users_modes = silc_realloc(*channel_users_modes,
4330 sizeof(**channel_users_modes) *
4332 (*channel_users_modes)[i] = NULL;
4333 *channel_modes = silc_realloc(*channel_modes,
4334 sizeof(**channel_modes) * (i + 1));
4335 (*channel_modes)[i] = NULL;
4336 *channel_ids = silc_realloc(*channel_ids,
4337 sizeof(**channel_ids) * (i + 1));
4338 (*channel_ids)[i] = NULL;
4339 silc_server_announce_get_channel_users(server, channel,
4340 &(*channel_modes)[i],
4342 &(*channel_users_modes)[i]);
4343 (*channel_ids)[i] = channel->id;
4345 /* Channel's topic */
4346 *channel_topics = silc_realloc(*channel_topics,
4347 sizeof(**channel_topics) * (i + 1));
4348 (*channel_topics)[i] = NULL;
4349 silc_server_announce_get_channel_topic(server, channel,
4350 &(*channel_topics)[i]);
4351 (*channel_users_modes_c)++;
4355 if (!silc_idcache_list_next(list, &id_cache))
4360 silc_idcache_list_free(list);
4364 /* This function is used to announce our existing channels to our router
4365 when we've connected to it. This also announces the users on the
4366 channels to the router. If the `creation_time' is non-zero only the
4367 channels that was created after the `creation_time' are announced.
4368 Note that the channel users are still announced even if the `creation_time'
4371 void silc_server_announce_channels(SilcServer server,
4372 unsigned long creation_time,
4373 SilcSocketConnection remote)
4375 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4376 SilcBuffer *channel_users_modes = NULL;
4377 SilcBuffer *channel_topics = NULL;
4378 SilcUInt32 channel_users_modes_c = 0;
4379 SilcChannelID **channel_ids = NULL;
4381 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4383 /* Get channels and channel users in local list */
4384 silc_server_announce_get_channels(server, server->local_list,
4385 &channels, &channel_modes,
4387 &channel_users_modes,
4388 &channel_users_modes_c,
4390 &channel_ids, creation_time);
4392 /* Get channels and channel users in global list */
4393 if (server->server_type != SILC_SERVER)
4394 silc_server_announce_get_channels(server, server->global_list,
4395 &channels, &channel_modes,
4397 &channel_users_modes,
4398 &channel_users_modes_c,
4400 &channel_ids, creation_time);
4403 silc_buffer_push(channels, channels->data - channels->head);
4404 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4406 /* Send the packet */
4407 silc_server_packet_send(server, remote,
4408 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4409 channels->data, channels->len,
4412 silc_buffer_free(channels);
4415 if (channel_users) {
4416 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4417 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4418 channel_users->len);
4420 /* Send the packet */
4421 silc_server_packet_send(server, remote,
4422 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4423 channel_users->data, channel_users->len,
4426 silc_buffer_free(channel_users);
4429 if (channel_modes) {
4432 for (i = 0; i < channel_users_modes_c; i++) {
4433 if (!channel_modes[i])
4435 silc_buffer_push(channel_modes[i],
4436 channel_modes[i]->data -
4437 channel_modes[i]->head);
4438 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4439 channel_modes[i]->len);
4440 silc_server_packet_send_dest(server, remote,
4441 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4442 channel_ids[i], SILC_ID_CHANNEL,
4443 channel_modes[i]->data,
4444 channel_modes[i]->len,
4446 silc_buffer_free(channel_modes[i]);
4448 silc_free(channel_modes);
4451 if (channel_users_modes) {
4454 for (i = 0; i < channel_users_modes_c; i++) {
4455 if (!channel_users_modes[i])
4457 silc_buffer_push(channel_users_modes[i],
4458 channel_users_modes[i]->data -
4459 channel_users_modes[i]->head);
4460 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4461 channel_users_modes[i]->len);
4462 silc_server_packet_send_dest(server, remote,
4463 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4464 channel_ids[i], SILC_ID_CHANNEL,
4465 channel_users_modes[i]->data,
4466 channel_users_modes[i]->len,
4468 silc_buffer_free(channel_users_modes[i]);
4470 silc_free(channel_users_modes);
4473 if (channel_topics) {
4476 for (i = 0; i < channel_users_modes_c; i++) {
4477 if (!channel_topics[i])
4480 silc_buffer_push(channel_topics[i],
4481 channel_topics[i]->data -
4482 channel_topics[i]->head);
4483 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4484 channel_topics[i]->len);
4485 silc_server_packet_send_dest(server, remote,
4486 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4487 channel_ids[i], SILC_ID_CHANNEL,
4488 channel_topics[i]->data,
4489 channel_topics[i]->len,
4491 silc_buffer_free(channel_topics[i]);
4493 silc_free(channel_topics);
4496 silc_free(channel_ids);
4499 /* Failure timeout callback. If this is called then we will immediately
4500 process the received failure. We always process the failure with timeout
4501 since we do not want to blindly trust to received failure packets.
4502 This won't be called (the timeout is cancelled) if the failure was
4503 bogus (it is bogus if remote does not close the connection after sending
4506 SILC_TASK_CALLBACK(silc_server_failure_callback)
4508 SilcServer server = app_context;
4509 SilcServerFailureContext f = (SilcServerFailureContext)context;
4511 if (f->sock->protocol) {
4512 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4513 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4516 silc_socket_free(f->sock);
4520 /* Assembles user list and users mode list from the `channel'. */
4522 bool silc_server_get_users_on_channel(SilcServer server,
4523 SilcChannelEntry channel,
4524 SilcBuffer *user_list,
4525 SilcBuffer *mode_list,
4526 SilcUInt32 *user_count)
4528 SilcChannelClientEntry chl;
4529 SilcHashTableList htl;
4530 SilcBuffer client_id_list;
4531 SilcBuffer client_mode_list;
4533 SilcUInt32 list_count = 0, len = 0;
4535 if (!silc_hash_table_count(channel->user_list))
4538 silc_hash_table_list(channel->user_list, &htl);
4539 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4540 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4541 silc_hash_table_list_reset(&htl);
4543 client_id_list = silc_buffer_alloc(len);
4545 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4546 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4547 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4549 silc_hash_table_list(channel->user_list, &htl);
4550 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4552 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4553 silc_buffer_put(client_id_list, idp->data, idp->len);
4554 silc_buffer_pull(client_id_list, idp->len);
4555 silc_buffer_free(idp);
4557 /* Client's mode on channel */
4558 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4559 silc_buffer_pull(client_mode_list, 4);
4563 silc_hash_table_list_reset(&htl);
4564 silc_buffer_push(client_id_list,
4565 client_id_list->data - client_id_list->head);
4566 silc_buffer_push(client_mode_list,
4567 client_mode_list->data - client_mode_list->head);
4569 *user_list = client_id_list;
4570 *mode_list = client_mode_list;
4571 *user_count = list_count;
4575 /* Saves users and their modes to the `channel'. */
4577 void silc_server_save_users_on_channel(SilcServer server,
4578 SilcSocketConnection sock,
4579 SilcChannelEntry channel,
4580 SilcClientID *noadd,
4581 SilcBuffer user_list,
4582 SilcBuffer mode_list,
4583 SilcUInt32 user_count)
4588 SilcClientID *client_id;
4589 SilcClientEntry client;
4590 SilcIDCacheEntry cache;
4591 SilcChannelClientEntry chl;
4593 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4594 channel->channel_name));
4596 for (i = 0; i < user_count; i++) {
4598 SILC_GET16_MSB(idp_len, user_list->data + 2);
4600 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4601 silc_buffer_pull(user_list, idp_len);
4606 SILC_GET32_MSB(mode, mode_list->data);
4607 silc_buffer_pull(mode_list, 4);
4609 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4610 silc_free(client_id);
4616 /* Check if we have this client cached already. */
4617 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4618 server->server_type, &cache);
4620 client = silc_idlist_find_client_by_id(server->global_list,
4621 client_id, server->server_type,
4624 /* If router did not find such Client ID in its lists then this must
4625 be bogus client or some router in the net is buggy. */
4626 if (server->server_type != SILC_SERVER) {
4627 silc_free(client_id);
4631 /* We don't have that client anywhere, add it. The client is added
4632 to global list since server didn't have it in the lists so it must be
4634 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4635 silc_id_dup(client_id, SILC_ID_CLIENT),
4636 sock->user_data, NULL, 0);
4638 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4639 silc_free(client_id);
4643 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4648 silc_free(client_id);
4650 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4651 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4652 "%s", channel->channel_name));
4656 if (!silc_server_client_on_channel(client, channel, &chl)) {
4657 /* Client was not on the channel, add it. */
4658 chl = silc_calloc(1, sizeof(*chl));
4659 chl->client = client;
4661 chl->channel = channel;
4662 silc_hash_table_add(channel->user_list, chl->client, chl);
4663 silc_hash_table_add(client->channels, chl->channel, chl);
4664 channel->user_count++;
4672 /* Saves channels and channels user modes to the `client'. Removes
4673 the client from those channels that are not sent in the list but
4676 void silc_server_save_user_channels(SilcServer server,
4677 SilcSocketConnection sock,
4678 SilcClientEntry client,
4679 SilcBuffer channels,
4680 SilcBuffer channels_user_modes)
4683 SilcUInt32 *chumodes;
4684 SilcChannelPayload entry;
4685 SilcChannelEntry channel;
4686 SilcChannelID *channel_id;
4687 SilcChannelClientEntry chl;
4688 SilcHashTable ht = NULL;
4689 SilcHashTableList htl;
4693 if (!channels || !channels_user_modes ||
4694 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4697 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4698 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4700 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4701 NULL, NULL, NULL, TRUE);
4702 silc_dlist_start(ch);
4703 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4704 /* Check if we have this channel, and add it if we don't have it.
4705 Also add the client on the channel unless it is there already. */
4706 channel_id = silc_channel_get_id_parse(entry);
4707 channel = silc_idlist_find_channel_by_id(server->local_list,
4710 channel = silc_idlist_find_channel_by_id(server->global_list,
4713 if (server->server_type != SILC_SERVER) {
4714 silc_free(channel_id);
4719 /* We don't have that channel anywhere, add it. */
4720 name = silc_channel_get_name(entry, NULL);
4721 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4722 channel_id, server->router,
4725 silc_free(channel_id);
4732 channel->mode = silc_channel_get_mode(entry);
4734 /* Add the client on the channel */
4735 if (!silc_server_client_on_channel(client, channel, &chl)) {
4736 chl = silc_calloc(1, sizeof(*chl));
4737 chl->client = client;
4738 chl->mode = chumodes[i++];
4739 chl->channel = channel;
4740 silc_hash_table_add(channel->user_list, chl->client, chl);
4741 silc_hash_table_add(client->channels, chl->channel, chl);
4742 channel->user_count++;
4745 chl->mode = chumodes[i++];
4748 silc_hash_table_add(ht, channel, channel);
4749 silc_free(channel_id);
4751 silc_channel_payload_list_free(ch);
4752 silc_free(chumodes);
4756 /* Go through the list again and remove client from channels that
4757 are no part of the list. */
4759 silc_hash_table_list(client->channels, &htl);
4760 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4761 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4762 silc_hash_table_del(chl->channel->user_list, chl->client);
4763 silc_hash_table_del(chl->client->channels, chl->channel);
4767 silc_hash_table_list_reset(&htl);
4768 silc_hash_table_free(ht);
4770 silc_hash_table_list(client->channels, &htl);
4771 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4772 silc_hash_table_del(chl->channel->user_list, chl->client);
4773 silc_hash_table_del(chl->client->channels, chl->channel);
4776 silc_hash_table_list_reset(&htl);
4780 /* Lookups route to the client indicated by the `id_data'. The connection
4781 object and internal data object is returned. Returns NULL if route
4782 could not be found to the client. If the `client_id' is specified then
4783 it is used and the `id_data' is ignored. */
4785 SilcSocketConnection
4786 silc_server_get_client_route(SilcServer server,
4787 unsigned char *id_data,
4789 SilcClientID *client_id,
4790 SilcIDListData *idata,
4791 SilcClientEntry *client_entry)
4794 SilcClientEntry client;
4796 SILC_LOG_DEBUG(("Start"));
4799 *client_entry = NULL;
4801 /* Decode destination Client ID */
4803 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4805 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4809 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4812 /* If the destination belongs to our server we don't have to route
4813 the packet anywhere but to send it to the local destination. */
4814 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4818 /* If we are router and the client has router then the client is in
4819 our cell but not directly connected to us. */
4820 if (server->server_type == SILC_ROUTER && client->router) {
4821 /* We are of course in this case the client's router thus the route
4822 to the client is the server who owns the client. So, we will send
4823 the packet to that server. */
4825 *idata = (SilcIDListData)client->router;
4826 return client->router->connection;
4829 /* Seems that client really is directly connected to us */
4831 *idata = (SilcIDListData)client;
4833 *client_entry = client;
4834 return client->connection;
4837 /* Destination belongs to someone not in this server. If we are normal
4838 server our action is to send the packet to our router. */
4839 if (server->server_type != SILC_ROUTER && !server->standalone) {
4842 *idata = (SilcIDListData)server->router;
4843 return SILC_PRIMARY_ROUTE(server);
4846 /* We are router and we will perform route lookup for the destination
4847 and send the packet to fastest route. */
4848 if (server->server_type == SILC_ROUTER && !server->standalone) {
4849 /* Check first that the ID is valid */
4850 client = silc_idlist_find_client_by_id(server->global_list, id,
4853 SilcSocketConnection dst_sock;
4855 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4859 *idata = (SilcIDListData)dst_sock->user_data;
4868 /* Encodes and returns channel list of channels the `client' has joined.
4869 Secret channels are not put to the list. */
4871 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4872 SilcClientEntry client,
4875 SilcBuffer *user_mode_list)
4877 SilcBuffer buffer = NULL;
4878 SilcChannelEntry channel;
4879 SilcChannelClientEntry chl;
4880 SilcHashTableList htl;
4883 SilcUInt16 name_len;
4887 *user_mode_list = NULL;
4889 silc_hash_table_list(client->channels, &htl);
4890 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4891 channel = chl->channel;
4893 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4895 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4898 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4899 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4900 name_len = strlen(channel->channel_name);
4902 len = 4 + name_len + id_len + 4;
4903 buffer = silc_buffer_realloc(buffer,
4904 (buffer ? buffer->truelen + len : len));
4905 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4906 silc_buffer_format(buffer,
4907 SILC_STR_UI_SHORT(name_len),
4908 SILC_STR_UI_XNSTRING(channel->channel_name,
4910 SILC_STR_UI_SHORT(id_len),
4911 SILC_STR_UI_XNSTRING(cid, id_len),
4912 SILC_STR_UI_INT(chl->channel->mode),
4914 silc_buffer_pull(buffer, len);
4917 if (user_mode_list) {
4918 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4920 (*user_mode_list)->truelen + 4 :
4922 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4923 (*user_mode_list)->data));
4924 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4925 silc_buffer_pull(*user_mode_list, 4);
4928 silc_hash_table_list_reset(&htl);
4931 silc_buffer_push(buffer, buffer->data - buffer->head);
4932 if (user_mode_list && *user_mode_list)
4933 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4934 (*user_mode_list)->head));
4939 /* Finds client entry by Client ID and if it is not found then resolves
4940 it using WHOIS command. */
4942 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4943 SilcClientID *client_id,
4944 bool always_resolve,
4947 SilcClientEntry client;
4952 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4955 client = silc_idlist_find_client_by_id(server->global_list,
4956 client_id, TRUE, NULL);
4957 if (!client && server->server_type == SILC_ROUTER)
4961 if (!client && server->standalone)
4964 if (!client || !client->nickname || !client->username ||
4966 SilcBuffer buffer, idp;
4969 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4970 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4971 client->resolve_cmd_ident = ++server->cmd_ident;
4974 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4975 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4976 server->cmd_ident, 1,
4977 4, idp->data, idp->len);
4978 silc_server_packet_send(server, client ? client->router->connection :
4979 SILC_PRIMARY_ROUTE(server),
4980 SILC_PACKET_COMMAND, 0,
4981 buffer->data, buffer->len, FALSE);
4982 silc_buffer_free(idp);
4983 silc_buffer_free(buffer);
4994 /* A timeout callback for the re-key. We will be the initiator of the
4997 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4999 SilcServer server = app_context;
5000 SilcSocketConnection sock = (SilcSocketConnection)context;
5001 SilcIDListData idata = (SilcIDListData)sock->user_data;
5002 SilcProtocol protocol;
5003 SilcServerRekeyInternalContext *proto_ctx;
5005 /* Allocate internal protocol context. This is sent as context
5007 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5008 proto_ctx->server = (void *)server;
5009 proto_ctx->sock = sock;
5010 proto_ctx->responder = FALSE;
5011 proto_ctx->pfs = idata->rekey->pfs;
5013 /* Perform rekey protocol. Will call the final callback after the
5014 protocol is over. */
5015 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5016 &protocol, proto_ctx, silc_server_rekey_final);
5017 sock->protocol = protocol;
5019 /* Run the protocol */
5020 silc_protocol_execute(protocol, server->schedule, 0, 0);
5022 SILC_LOG_DEBUG(("Rekey protocol completed"));
5024 /* Re-register re-key timeout */
5025 silc_schedule_task_add(server->schedule, sock->sock,
5026 silc_server_rekey_callback,
5027 context, idata->rekey->timeout, 0,
5028 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5031 /* The final callback for the REKEY protocol. This will actually take the
5032 new key material into use. */
5034 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5036 SilcProtocol protocol = (SilcProtocol)context;
5037 SilcServerRekeyInternalContext *ctx =
5038 (SilcServerRekeyInternalContext *)protocol->context;
5039 SilcServer server = (SilcServer)ctx->server;
5040 SilcSocketConnection sock = ctx->sock;
5042 SILC_LOG_DEBUG(("Start"));
5044 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5045 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5046 /* Error occured during protocol */
5047 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5048 silc_protocol_cancel(protocol, server->schedule);
5049 silc_protocol_free(protocol);
5050 sock->protocol = NULL;
5052 silc_packet_context_free(ctx->packet);
5054 silc_ske_free(ctx->ske);
5059 /* Purge the outgoing data queue to assure that all rekey packets really
5060 go to the network before we quit the protocol. */
5061 silc_server_packet_queue_purge(server, sock);
5064 silc_protocol_free(protocol);
5065 sock->protocol = NULL;
5067 silc_packet_context_free(ctx->packet);
5069 silc_ske_free(ctx->ske);
5073 /* Task callback used to retrieve network statistical information from
5074 router server once in a while. */
5076 SILC_TASK_CALLBACK(silc_server_get_stats)
5078 SilcServer server = (SilcServer)context;
5079 SilcBuffer idp, packet;
5081 SILC_LOG_DEBUG(("Retrieving stats from router"));
5083 if (!server->standalone) {
5084 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5085 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5086 ++server->cmd_ident, 1,
5087 1, idp->data, idp->len);
5088 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5089 SILC_PACKET_COMMAND, 0, packet->data,
5090 packet->len, FALSE);
5091 silc_buffer_free(packet);
5092 silc_buffer_free(idp);
5095 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5096 server, 120, 0, SILC_TASK_TIMEOUT,