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_get_stats);
48 /* Allocates a new SILC server object. This has to be done before the server
49 can be used. After allocation one must call silc_server_init to initialize
50 the server. The new allocated server object is returned to the new_server
53 int silc_server_alloc(SilcServer *new_server)
57 SILC_LOG_DEBUG(("Allocating new server object"));
59 server = silc_calloc(1, sizeof(*server));
60 server->server_type = SILC_SERVER;
61 server->standalone = TRUE;
62 server->local_list = silc_calloc(1, sizeof(*server->local_list));
63 server->global_list = silc_calloc(1, sizeof(*server->global_list));
64 server->pending_commands = silc_dlist_init();
66 server->sim = silc_dlist_init();
74 /* Free's the SILC server object. This is called at the very end before
77 void silc_server_free(SilcServer server)
80 SilcIDCacheEntry cache;
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
93 silc_dlist_uninit(server->sim);
97 silc_server_backup_free(server);
98 silc_server_config_unref(&server->config_ref);
100 silc_rng_free(server->rng);
102 silc_pkcs_free(server->pkcs);
103 if (server->public_key)
104 silc_pkcs_public_key_free(server->public_key);
105 if (server->private_key)
106 silc_pkcs_private_key_free(server->private_key);
107 if (server->pending_commands)
108 silc_dlist_uninit(server->pending_commands);
109 if (server->id_entry)
110 silc_idlist_del_server(server->local_list, server->id_entry);
112 /* Delete all channels */
114 if (silc_idcache_get_all(server->local_list->channels, &list) &&
115 silc_idcache_list_first(list, &cache)) {
116 silc_idlist_del_channel(server->local_list, cache->context);
117 while (silc_idcache_list_next(list, &cache))
118 silc_idlist_del_channel(server->local_list, cache->context);
121 silc_idcache_list_free(list);
123 if (silc_idcache_get_all(server->global_list->channels, &list) &&
124 silc_idcache_list_first(list, &cache)) {
125 silc_idlist_del_channel(server->global_list, cache->context);
126 while (silc_idcache_list_next(list, &cache))
127 silc_idlist_del_channel(server->global_list, cache->context);
130 silc_idcache_list_free(list);
132 /* Delete all clients */
134 if (silc_idcache_get_all(server->local_list->clients, &list) &&
135 silc_idcache_list_first(list, &cache)) {
136 silc_idlist_del_client(server->local_list, cache->context);
137 while (silc_idcache_list_next(list, &cache))
138 silc_idlist_del_client(server->local_list, cache->context);
141 silc_idcache_list_free(list);
143 if (silc_idcache_get_all(server->global_list->clients, &list) &&
144 silc_idcache_list_first(list, &cache)) {
145 silc_idlist_del_client(server->global_list, cache->context);
146 while (silc_idcache_list_next(list, &cache))
147 silc_idlist_del_client(server->global_list, cache->context);
150 silc_idcache_list_free(list);
152 /* Delete all servers */
154 if (silc_idcache_get_all(server->local_list->servers, &list) &&
155 silc_idcache_list_first(list, &cache)) {
156 silc_idlist_del_server(server->local_list, cache->context);
157 while (silc_idcache_list_next(list, &cache))
158 silc_idlist_del_server(server->local_list, cache->context);
161 silc_idcache_list_free(list);
163 if (silc_idcache_get_all(server->global_list->servers, &list) &&
164 silc_idcache_list_first(list, &cache)) {
165 silc_idlist_del_server(server->global_list, cache->context);
166 while (silc_idcache_list_next(list, &cache))
167 silc_idlist_del_server(server->global_list, cache->context);
170 silc_idcache_list_free(list);
172 silc_idcache_free(server->local_list->clients);
173 silc_idcache_free(server->local_list->servers);
174 silc_idcache_free(server->local_list->channels);
175 silc_idcache_free(server->global_list->clients);
176 silc_idcache_free(server->global_list->servers);
177 silc_idcache_free(server->global_list->channels);
178 silc_hash_table_free(server->watcher_list);
180 silc_hash_free(server->md5hash);
181 silc_hash_free(server->sha1hash);
182 silc_hmac_unregister_all();
183 silc_hash_unregister_all();
184 silc_cipher_unregister_all();
185 silc_pkcs_unregister_all();
187 silc_free(server->local_list);
188 silc_free(server->global_list);
189 silc_free(server->server_name);
190 silc_free(server->id_string);
191 silc_free(server->purge_i);
192 silc_free(server->purge_g);
196 /* Creates a new server listener. */
198 static bool silc_server_listen(SilcServer server, const char *server_ip,
199 SilcUInt16 port, int *sock)
201 *sock = silc_net_create_server(port, server_ip);
203 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
210 /* Adds a secondary listener. */
212 bool silc_server_init_secondary(SilcServer server)
214 int sock = 0, sock_list[server->config->param.connections_max];
215 SilcSocketConnection newsocket = NULL;
216 SilcServerConfigServerInfoInterface *interface;
218 for (interface = server->config->server_info->secondary; interface;
219 interface = interface->next, sock++) {
221 if (!silc_server_listen(server,
222 interface->server_ip, interface->port, &sock_list[sock]))
225 /* Set socket to non-blocking mode */
226 silc_net_set_socket_nonblock(sock_list[sock]);
228 /* Add ourselves also to the socket table. The entry allocated above
229 is sent as argument for fast referencing in the future. */
230 silc_socket_alloc(sock_list[sock],
231 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
232 server->sockets[sock_list[sock]] = newsocket;
233 SILC_SET_LISTENER(newsocket);
235 /* Perform name and address lookups to resolve the listenning address
237 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
239 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
241 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
242 newsocket->hostname ? newsocket->hostname :
243 newsocket->ip ? newsocket->ip : ""));
244 server->stat.conn_failures++;
247 if (!newsocket->hostname)
248 newsocket->hostname = strdup(newsocket->ip);
250 newsocket->port = silc_net_get_local_port(sock);
252 newsocket->user_data = (void *)server->id_entry;
253 silc_schedule_task_add(server->schedule, sock_list[sock],
254 silc_server_accept_new_connection,
255 (void *)server, 0, 0,
257 SILC_TASK_PRI_NORMAL);
263 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
267 /* Initializes the entire SILC server. This is called always before running
268 the server. This is called only once at the initialization of the program.
269 This binds the server to its listenning port. After this function returns
270 one should call silc_server_run to start the server. This returns TRUE
271 when everything is ok to run the server. Configuration file must be
272 read and parsed before calling this. */
274 bool silc_server_init(SilcServer server)
278 SilcServerEntry id_entry;
279 SilcIDListPurge purge;
280 SilcSocketConnection newsocket = NULL;
282 SILC_LOG_DEBUG(("Initializing server"));
284 server->starttime = time(NULL);
286 /* Take config object for us */
287 silc_server_config_ref(&server->config_ref, server->config,
290 /* Steal public and private key from the config object */
291 server->public_key = server->config->server_info->public_key;
292 server->private_key = server->config->server_info->private_key;
293 server->config->server_info->public_key = NULL;
294 server->config->server_info->private_key = NULL;
296 /* Register all configured ciphers, PKCS and hash functions. */
297 if (!silc_server_config_register_ciphers(server))
298 silc_cipher_register_default();
299 if (!silc_server_config_register_pkcs(server))
300 silc_pkcs_register_default();
301 if (!silc_server_config_register_hashfuncs(server))
302 silc_hash_register_default();
303 if (!silc_server_config_register_hmacs(server))
304 silc_hmac_register_default();
306 /* Initialize random number generator for the server. */
307 server->rng = silc_rng_alloc();
308 silc_rng_init(server->rng);
309 silc_rng_global_init(server->rng);
311 /* Initialize hash functions for server to use */
312 silc_hash_alloc("md5", &server->md5hash);
313 silc_hash_alloc("sha1", &server->sha1hash);
315 /* Allocate PKCS context for local public and private keys */
316 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
318 silc_pkcs_public_key_set(server->pkcs, server->public_key);
319 silc_pkcs_private_key_set(server->pkcs, server->private_key);
321 /* Initialize the scheduler */
322 server->schedule = silc_schedule_init(server->config->param.connections_max,
324 if (!server->schedule)
327 /* First, register log files configuration for error output */
328 silc_server_config_setlogfiles(server);
330 /* Initialize ID caches */
331 server->local_list->clients =
332 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
333 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
334 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
336 /* These are allocated for normal server as well as these hold some
337 global information that the server has fetched from its router. For
338 router these are used as they are supposed to be used on router. */
339 server->global_list->clients =
340 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
341 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
342 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
344 /* Init watcher list */
345 server->watcher_list =
346 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
347 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
349 if (!server->watcher_list)
352 /* Create a listening server */
353 if (!silc_server_listen(server,
354 server->config->server_info->primary == NULL ? NULL :
355 server->config->server_info->primary->server_ip,
356 server->config->server_info->primary == NULL ? 0 :
357 server->config->server_info->primary->port,
361 /* Set socket to non-blocking mode */
362 silc_net_set_socket_nonblock(sock);
365 /* Allocate the entire socket list that is used in server. Eventually
366 all connections will have entry in this table (it is a table of
367 pointers to the actual object that is allocated individually
369 server->sockets = silc_calloc(server->config->param.connections_max,
370 sizeof(*server->sockets));
371 if (!server->sockets)
374 /* Add ourselves also to the socket table. The entry allocated above
375 is sent as argument for fast referencing in the future. */
376 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
377 server->sockets[sock] = newsocket;
378 SILC_SET_LISTENER(newsocket);
380 /* Perform name and address lookups to resolve the listenning address
382 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
384 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
386 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
387 newsocket->hostname ? newsocket->hostname :
388 newsocket->ip ? newsocket->ip : ""));
389 server->stat.conn_failures++;
392 if (!newsocket->hostname)
393 newsocket->hostname = strdup(newsocket->ip);
395 newsocket->port = silc_net_get_local_port(sock);
397 /* Create a Server ID for the server. */
398 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
403 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
404 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
405 server->server_name = server->config->server_info->server_name;
406 server->config->server_info->server_name = NULL;
408 /* Add ourselves to the server list. We don't have a router yet
409 beacuse we haven't established a route yet. It will be done later.
410 For now, NULL is sent as router. This allocates new entry to
413 silc_idlist_add_server(server->local_list, strdup(server->server_name),
414 server->server_type, server->id, NULL, NULL);
416 SILC_LOG_ERROR(("Could not add ourselves to cache"));
419 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
421 /* Put the allocated socket pointer also to the entry allocated above
422 for fast back-referencing to the socket list. */
423 newsocket->user_data = (void *)id_entry;
424 id_entry->connection = (void *)newsocket;
425 server->id_entry = id_entry;
427 /* Register protocols */
428 silc_server_protocols_register();
430 /* Add the first task to the scheduler. This is task that is executed by
431 timeout. It expires as soon as the caller calls silc_server_run. This
432 task performs authentication protocol and key exchange with our
434 silc_schedule_task_add(server->schedule, 0,
435 silc_server_connect_to_router,
436 (void *)server, 0, 1,
438 SILC_TASK_PRI_NORMAL);
440 /* Add listener task to the scheduler. This task receives new connections
441 to the server. This task remains on the queue until the end of the
443 silc_schedule_task_add(server->schedule, sock,
444 silc_server_accept_new_connection,
445 (void *)server, 0, 0,
447 SILC_TASK_PRI_NORMAL);
449 if (silc_server_init_secondary(server) == FALSE)
452 server->listenning = TRUE;
454 /* If server connections has been configured then we must be router as
455 normal server cannot have server connections, only router connections. */
456 if (server->config->servers) {
457 SilcServerConfigServer *ptr = server->config->servers;
459 server->server_type = SILC_ROUTER;
461 if (ptr->backup_router) {
462 server->server_type = SILC_BACKUP_ROUTER;
463 server->backup_router = TRUE;
464 server->id_entry->server_type = SILC_BACKUP_ROUTER;
471 /* Register the ID Cache purge task. This periodically purges the ID cache
472 and removes the expired cache entries. */
474 /* Clients local list */
475 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
476 purge->cache = server->local_list->clients;
477 purge->timeout = 600;
478 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
479 (void *)purge, purge->timeout, 0,
480 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
482 /* Clients global list */
483 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
484 purge->cache = server->global_list->clients;
485 purge->timeout = 300;
486 silc_schedule_task_add(server->schedule, 0, silc_idlist_purge,
487 (void *)purge, purge->timeout, 0,
488 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
490 /* If we are normal server we'll retrieve network statisticial information
491 once in a while from the router. */
492 if (server->server_type != SILC_ROUTER)
493 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
494 server, 10, 0, SILC_TASK_TIMEOUT,
497 if (server->server_type == SILC_ROUTER)
498 server->stat.routers++;
500 SILC_LOG_DEBUG(("Server initialized"));
502 /* We are done here, return succesfully */
506 silc_server_config_unref(&server->config_ref);
507 silc_net_close_server(sock);
511 /* Task callback to close a socket connection after rehash */
513 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
515 SilcServer server = context;
516 SilcSocketConnection sock = server->sockets[fd];
521 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
522 sock->hostname, sock->port,
523 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
524 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
525 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
527 silc_schedule_task_del_by_context(server->schedule, sock);
528 silc_server_disconnect_remote(server, sock,
529 SILC_STATUS_ERR_BANNED_FROM_SERVER,
530 "This connection is removed from "
533 silc_server_free_sock_user_data(server, sock, NULL);
536 /* This function basically reads the config file again and switches the config
537 object pointed by the server object. After that, we have to fix various
538 things such as the server_name and the listening ports.
539 Keep in mind that we no longer have the root privileges at this point. */
541 bool silc_server_rehash(SilcServer server)
543 SilcServerConfig newconfig;
545 SILC_LOG_INFO(("Rehashing server"));
547 /* Reset the logging system */
548 silc_log_quick = TRUE;
549 silc_log_flush_all();
551 /* Start the main rehash phase (read again the config file) */
552 newconfig = silc_server_config_alloc(server->config_file);
554 SILC_LOG_ERROR(("Rehash FAILED."));
558 /* Reinit scheduler if necessary */
559 if (newconfig->param.connections_max > server->config->param.connections_max)
560 if (!silc_schedule_reinit(server->schedule,
561 newconfig->param.connections_max))
564 /* Fix the server_name field */
565 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
566 silc_free(server->server_name);
567 server->server_name = newconfig->server_info->server_name;
568 newconfig->server_info->server_name = NULL;
570 /* Update the idcache list with a fresh pointer */
571 silc_free(server->id_entry->server_name);
572 server->id_entry->server_name = strdup(server->server_name);
573 if (!silc_idcache_del_by_context(server->local_list->servers,
576 if (!silc_idcache_add(server->local_list->servers,
577 server->id_entry->server_name,
578 server->id_entry->id, server->id_entry, 0, NULL))
583 silc_server_config_setlogfiles(server);
585 /* Change new key pair if necessary */
586 if (newconfig->server_info->public_key &&
587 !silc_pkcs_public_key_compare(server->public_key,
588 newconfig->server_info->public_key)) {
589 silc_pkcs_public_key_free(server->public_key);
590 silc_pkcs_private_key_free(server->private_key);
591 server->public_key = newconfig->server_info->public_key;
592 server->private_key = newconfig->server_info->private_key;
593 newconfig->server_info->public_key = NULL;
594 newconfig->server_info->private_key = NULL;
596 /* Allocate PKCS context for local public and private keys */
597 silc_pkcs_free(server->pkcs);
598 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
600 silc_pkcs_public_key_set(server->pkcs, server->public_key);
601 silc_pkcs_private_key_set(server->pkcs, server->private_key);
604 /* Check for unconfigured server and router connections and close
605 connections that were unconfigured. */
607 if (server->config->routers) {
608 SilcServerConfigRouter *ptr;
609 SilcServerConfigRouter *newptr;
612 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
615 /* Check whether new config has this one too */
616 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
617 if (silc_string_compare(newptr->host, ptr->host) &&
618 newptr->port == ptr->port &&
619 newptr->initiator == ptr->initiator) {
625 if (!found && ptr->host) {
626 /* Remove this connection */
627 SilcSocketConnection sock;
628 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
629 ptr->host, ptr->port);
630 if (sock && !SILC_IS_LISTENER(sock))
631 silc_schedule_task_add(server->schedule, sock->sock,
632 silc_server_rehash_close_connection,
633 server, 0, 1, SILC_TASK_TIMEOUT,
634 SILC_TASK_PRI_NORMAL);
639 if (server->config->servers) {
640 SilcServerConfigServer *ptr;
641 SilcServerConfigServer *newptr;
644 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
647 /* Check whether new config has this one too */
648 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
649 if (silc_string_compare(newptr->host, ptr->host)) {
655 if (!found && ptr->host) {
656 /* Remove this connection */
657 SilcSocketConnection sock;
658 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
660 if (sock && !SILC_IS_LISTENER(sock))
661 silc_schedule_task_add(server->schedule, sock->sock,
662 silc_server_rehash_close_connection,
663 server, 0, 1, SILC_TASK_TIMEOUT,
664 SILC_TASK_PRI_NORMAL);
669 if (server->config->clients) {
670 SilcServerConfigClient *ptr;
671 SilcServerConfigClient *newptr;
674 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
677 /* Check whether new config has this one too */
678 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
679 if (silc_string_compare(newptr->host, ptr->host)) {
685 if (!found && ptr->host) {
686 /* Remove this connection */
687 SilcSocketConnection sock;
688 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_CLIENT,
691 silc_schedule_task_add(server->schedule, sock->sock,
692 silc_server_rehash_close_connection,
693 server, 0, 1, SILC_TASK_TIMEOUT,
694 SILC_TASK_PRI_NORMAL);
699 /* Go through all configured routers after rehash */
700 silc_schedule_task_add(server->schedule, 0,
701 silc_server_connect_to_router,
702 (void *)server, 0, 1,
704 SILC_TASK_PRI_NORMAL);
706 /* Check whether our router status has changed */
707 if (newconfig->servers) {
708 SilcServerConfigServer *ptr = newconfig->servers;
710 server->server_type = SILC_ROUTER;
712 if (ptr->backup_router) {
713 server->server_type = SILC_BACKUP_ROUTER;
714 server->backup_router = TRUE;
715 server->id_entry->server_type = SILC_BACKUP_ROUTER;
722 /* Our old config is gone now. We'll unreference our reference made in
723 silc_server_init and then destroy it since we are destroying it
724 underneath the application (layer which called silc_server_init). */
725 silc_server_config_unref(&server->config_ref);
726 silc_server_config_destroy(server->config);
728 /* Take new config context */
729 server->config = newconfig;
730 silc_server_config_ref(&server->config_ref, server->config, server->config);
732 SILC_LOG_DEBUG(("Server rehashed"));
737 /* The heart of the server. This runs the scheduler thus runs the server.
738 When this returns the server has been stopped and the program will
741 void silc_server_run(SilcServer server)
743 SILC_LOG_INFO(("SILC Server started"));
745 /* Start the scheduler, the heart of the SILC server. When this returns
746 the program will be terminated. */
747 silc_schedule(server->schedule);
750 /* Stops the SILC server. This function is used to shutdown the server.
751 This is usually called after the scheduler has returned. After stopping
752 the server one should call silc_server_free. */
754 void silc_server_stop(SilcServer server)
756 SILC_LOG_INFO(("SILC Server shutting down"));
758 if (server->schedule) {
761 server->server_shutdown = TRUE;
763 /* Close all connections */
764 for (i = 0; i < server->config->param.connections_max; i++) {
765 if (!server->sockets[i])
767 if (!SILC_IS_LISTENER(server->sockets[i])) {
768 SilcSocketConnection sock = server->sockets[i];
769 SilcIDListData idata = sock->user_data;
772 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
774 silc_schedule_task_del_by_context(server->schedule,
776 silc_server_disconnect_remote(server, server->sockets[i],
778 "Server is shutting down");
780 silc_server_free_sock_user_data(server, sock,
781 "Server is shutting down");
782 silc_socket_free(sock);
784 silc_socket_free(server->sockets[i]);
785 server->sockets[i] = NULL;
789 /* We are not connected to network anymore */
790 server->standalone = TRUE;
792 silc_schedule_stop(server->schedule);
793 silc_schedule_uninit(server->schedule);
794 server->schedule = NULL;
796 silc_free(server->sockets);
797 server->sockets = NULL;
800 silc_server_protocols_unregister();
802 SILC_LOG_DEBUG(("Server stopped"));
805 /* Function that is called when the network connection to a router has
806 been established. This will continue with the key exchange protocol
807 with the remote router. */
809 void silc_server_start_key_exchange(SilcServer server,
810 SilcServerConnection sconn,
813 SilcSocketConnection newsocket;
814 SilcProtocol protocol;
815 SilcServerKEInternalContext *proto_ctx;
816 SilcServerConfigRouter *conn =
817 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
820 /* Cancel any possible retry timeouts */
821 silc_schedule_task_del_by_callback(server->schedule,
822 silc_server_connect_to_router_retry);
824 /* Set socket options */
825 silc_net_set_socket_nonblock(sock);
826 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
828 /* Create socket connection for the connection. Even though we
829 know that we are connecting to a router we will mark the socket
830 to be unknown connection until we have executed authentication
832 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
833 server->sockets[sock] = newsocket;
834 newsocket->hostname = strdup(sconn->remote_host);
835 newsocket->ip = strdup(sconn->remote_host);
836 newsocket->port = sconn->remote_port;
837 sconn->sock = newsocket;
839 /* Allocate internal protocol context. This is sent as context
841 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
842 proto_ctx->server = (void *)server;
843 proto_ctx->context = (void *)sconn;
844 proto_ctx->sock = newsocket;
845 proto_ctx->rng = server->rng;
846 proto_ctx->responder = FALSE;
848 /* Set Key Exchange flags from configuration, but fall back to global
850 SILC_GET_SKE_FLAGS(conn, proto_ctx);
851 if (server->config->param.key_exchange_pfs)
852 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
854 /* Perform key exchange protocol. silc_server_connect_to_router_second
855 will be called after the protocol is finished. */
856 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
857 &protocol, proto_ctx,
858 silc_server_connect_to_router_second);
859 newsocket->protocol = protocol;
861 /* Register a timeout task that will be executed if the protocol
862 is not executed within set limit. */
863 proto_ctx->timeout_task =
864 silc_schedule_task_add(server->schedule, sock,
865 silc_server_timeout_remote,
866 server, server->config->key_exchange_timeout, 0,
870 /* Register the connection for network input and output. This sets
871 that scheduler will listen for incoming packets for this connection
872 and sets that outgoing packets may be sent to this connection as
873 well. However, this doesn't set the scheduler for outgoing traffic,
874 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
875 later when outgoing data is available. */
876 context = (void *)server;
877 SILC_REGISTER_CONNECTION_FOR_IO(sock);
879 /* Run the protocol */
880 silc_protocol_execute(protocol, server->schedule, 0, 0);
883 /* Timeout callback that will be called to retry connecting to remote
884 router. This is used by both normal and router server. This will wait
885 before retrying the connecting. The timeout is generated by exponential
886 backoff algorithm. */
888 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
890 SilcServer server = app_context;
891 SilcServerConnection sconn = (SilcServerConnection)context;
892 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
893 SilcServerConfigConnParams *param =
894 (conn->param ? conn->param : &server->config->param);
896 /* Don't retry if we are shutting down. */
897 if (server->server_shutdown) {
898 silc_server_config_unref(&sconn->conn);
899 silc_free(sconn->remote_host);
900 silc_free(sconn->backup_replace_ip);
905 SILC_LOG_INFO(("Retrying connecting to a router"));
907 /* Calculate next timeout */
908 if (sconn->retry_count >= 1) {
909 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
910 if (sconn->retry_timeout > param->reconnect_interval_max)
911 sconn->retry_timeout = param->reconnect_interval_max;
913 sconn->retry_timeout = param->reconnect_interval;
915 sconn->retry_count++;
916 sconn->retry_timeout = sconn->retry_timeout +
917 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
919 /* If we've reached max retry count, give up. */
920 if ((sconn->retry_count > param->reconnect_count) &&
921 !param->reconnect_keep_trying) {
922 SILC_LOG_ERROR(("Could not connect to router, giving up"));
923 silc_server_config_unref(&sconn->conn);
924 silc_free(sconn->remote_host);
925 silc_free(sconn->backup_replace_ip);
930 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
931 sconn->retry_timeout));
933 /* We will lookup a fresh pointer later */
934 silc_server_config_unref(&sconn->conn);
936 /* Wait one before retrying */
937 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
938 context, sconn->retry_timeout, 0,
939 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
942 /* Generic routine to use connect to a router. */
944 SILC_TASK_CALLBACK(silc_server_connect_router)
946 SilcServer server = app_context;
947 SilcServerConnection sconn = (SilcServerConnection)context;
948 SilcServerConfigRouter *rconn;
951 /* Don't connect if we are shutting down. */
952 if (server->server_shutdown) {
953 silc_free(sconn->remote_host);
954 silc_free(sconn->backup_replace_ip);
959 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
960 (sconn->backup ? "backup router" : "router"),
961 sconn->remote_host, sconn->remote_port));
963 server->router_connect = time(NULL);
964 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
967 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
968 (sconn->backup ? "backup router" : "router"),
969 sconn->remote_host, sconn->remote_port));
970 silc_free(sconn->remote_host);
971 silc_free(sconn->backup_replace_ip);
975 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
977 /* Connect to remote host */
978 sock = silc_net_create_connection(
979 (!server->config->server_info->primary ? NULL :
980 server->config->server_info->primary->server_ip),
981 sconn->remote_port, sconn->remote_host);
983 SILC_LOG_ERROR(("Could not connect to router %s:%d",
984 sconn->remote_host, sconn->remote_port));
985 if (!sconn->no_reconnect)
986 silc_schedule_task_add(server->schedule, 0,
987 silc_server_connect_to_router_retry,
988 context, 0, 1, SILC_TASK_TIMEOUT,
989 SILC_TASK_PRI_NORMAL);
991 silc_server_config_unref(&sconn->conn);
992 silc_free(sconn->remote_host);
993 silc_free(sconn->backup_replace_ip);
999 /* Continue with key exchange protocol */
1000 silc_server_start_key_exchange(server, sconn, sock);
1003 /* This function connects to our primary router or if we are a router this
1004 establishes all our primary routes. This is called at the start of the
1005 server to do authentication and key exchange with our router - called
1008 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1010 SilcServer server = (SilcServer)context;
1011 SilcServerConnection sconn;
1012 SilcServerConfigRouter *ptr;
1014 /* Don't connect if we are shutting down. */
1015 if (server->server_shutdown)
1018 SILC_LOG_DEBUG(("We are %s",
1019 (server->server_type == SILC_SERVER ?
1020 "normal server" : server->server_type == SILC_ROUTER ?
1021 "router" : "backup router/normal server")));
1023 if (!server->config->routers) {
1024 /* There wasn't a configured router, we will continue but we don't
1025 have a connection to outside world. We will be standalone server. */
1026 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1027 server->standalone = TRUE;
1031 /* Cancel any possible retry timeouts */
1032 silc_schedule_task_del_by_callback(server->schedule,
1033 silc_server_connect_router);
1034 silc_schedule_task_del_by_callback(server->schedule,
1035 silc_server_connect_to_router_retry);
1037 /* Create the connections to all our routes */
1038 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1040 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1041 ptr->backup_router ? "Backup router" : "Router",
1042 ptr->initiator ? "Initiator" : "Responder",
1043 ptr->host, ptr->port));
1045 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1046 ptr->initiator == FALSE && !server->backup_router &&
1047 !silc_server_config_get_backup_router(server))
1048 server->wait_backup = TRUE;
1050 if (ptr->initiator) {
1051 /* Check whether we are connected to this host already */
1052 if (silc_server_num_sockets_by_remote(server,
1053 silc_net_is_ip(ptr->host) ?
1055 silc_net_is_ip(ptr->host) ?
1056 NULL : ptr->host, ptr->port,
1057 SILC_SOCKET_TYPE_ROUTER)) {
1058 SILC_LOG_DEBUG(("We are already connected to this router"));
1062 /* Allocate connection object for hold connection specific stuff. */
1063 sconn = silc_calloc(1, sizeof(*sconn));
1064 sconn->remote_host = strdup(ptr->host);
1065 sconn->remote_port = ptr->port;
1066 sconn->backup = ptr->backup_router;
1067 if (sconn->backup) {
1068 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1069 sconn->backup_replace_port = ptr->backup_replace_port;
1072 if (!server->router_conn && !sconn->backup)
1073 server->router_conn = sconn;
1075 silc_schedule_task_add(server->schedule, 0,
1076 silc_server_connect_router,
1077 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1078 SILC_TASK_PRI_NORMAL);
1083 /* Second part of connecting to router(s). Key exchange protocol has been
1084 executed and now we will execute authentication protocol. */
1086 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
1088 SilcProtocol protocol = (SilcProtocol)context;
1089 SilcServerKEInternalContext *ctx =
1090 (SilcServerKEInternalContext *)protocol->context;
1091 SilcServer server = (SilcServer)ctx->server;
1092 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1093 SilcSocketConnection sock = ctx->sock;
1094 SilcServerConnAuthInternalContext *proto_ctx;
1095 SilcServerConfigRouter *conn = NULL;
1097 SILC_LOG_DEBUG(("Start"));
1099 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1100 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1101 /* Error occured during protocol */
1102 silc_protocol_free(protocol);
1103 sock->protocol = NULL;
1104 silc_ske_free_key_material(ctx->keymat);
1106 silc_packet_context_free(ctx->packet);
1108 silc_ske_free(ctx->ske);
1109 silc_free(ctx->dest_id);
1111 silc_schedule_task_del_by_callback(server->schedule,
1112 silc_server_failure_callback);
1113 silc_server_disconnect_remote(server, sock,
1114 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1116 /* Try reconnecting if configuration wants it */
1117 if (!sconn->no_reconnect) {
1118 silc_schedule_task_add(server->schedule, 0,
1119 silc_server_connect_to_router_retry,
1120 sconn, 0, 1, SILC_TASK_TIMEOUT,
1121 SILC_TASK_PRI_NORMAL);
1125 /* Call completion to indicate error */
1126 if (sconn->callback)
1127 (*sconn->callback)(server, NULL, sconn->callback_context);
1129 silc_server_config_unref(&sconn->conn);
1130 silc_free(sconn->remote_host);
1131 silc_free(sconn->backup_replace_ip);
1136 /* We now have the key material as the result of the key exchange
1137 protocol. Take the key material into use. Free the raw key material
1138 as soon as we've set them into use. */
1139 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1140 ctx->sock, ctx->keymat,
1141 ctx->ske->prop->cipher,
1142 ctx->ske->prop->pkcs,
1143 ctx->ske->prop->hash,
1144 ctx->ske->prop->hmac,
1145 ctx->ske->prop->group,
1147 silc_protocol_free(protocol);
1148 sock->protocol = NULL;
1149 silc_ske_free_key_material(ctx->keymat);
1151 silc_packet_context_free(ctx->packet);
1153 silc_ske_free(ctx->ske);
1154 silc_free(ctx->dest_id);
1156 silc_schedule_task_del_by_callback(server->schedule,
1157 silc_server_failure_callback);
1158 silc_server_disconnect_remote(server, sock,
1159 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1161 /* Try reconnecting if configuration wants it */
1162 if (!sconn->no_reconnect) {
1163 silc_schedule_task_add(server->schedule, 0,
1164 silc_server_connect_to_router_retry,
1165 sconn, 0, 1, SILC_TASK_TIMEOUT,
1166 SILC_TASK_PRI_NORMAL);
1170 /* Call completion to indicate error */
1171 if (sconn->callback)
1172 (*sconn->callback)(server, NULL, sconn->callback_context);
1174 silc_server_config_unref(&sconn->conn);
1175 silc_free(sconn->remote_host);
1176 silc_free(sconn->backup_replace_ip);
1180 silc_ske_free_key_material(ctx->keymat);
1182 /* Allocate internal context for the authentication protocol. This
1183 is sent as context for the protocol. */
1184 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1185 proto_ctx->server = (void *)server;
1186 proto_ctx->context = (void *)sconn;
1187 proto_ctx->sock = sock;
1188 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1189 proto_ctx->dest_id_type = ctx->dest_id_type;
1190 proto_ctx->dest_id = ctx->dest_id;
1192 /* Resolve the authentication method used in this connection. Check if
1193 we find a match from user configured connections */
1194 if (!sconn->conn.ref_ptr)
1195 conn = silc_server_config_find_router_conn(server, sock->hostname,
1198 conn = sconn->conn.ref_ptr;
1201 /* Match found. Use the configured authentication method. Take only
1202 the passphrase, since for public key auth we automatically use
1203 our local key pair. */
1204 if (conn->passphrase) {
1205 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1206 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1208 proto_ctx->auth_data = strdup(conn->passphrase);
1209 proto_ctx->auth_data_len = strlen(conn->passphrase);
1210 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1212 } else if (conn->publickeys) {
1213 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1215 proto_ctx->auth_meth = SILC_AUTH_NONE;
1218 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1219 sock->hostname, sock->ip, sock->port));
1220 silc_protocol_free(protocol);
1221 sock->protocol = NULL;
1223 silc_packet_context_free(ctx->packet);
1225 silc_ske_free(ctx->ske);
1226 silc_free(ctx->dest_id);
1228 silc_server_config_unref(&sconn->conn);
1229 silc_free(sconn->remote_host);
1230 silc_free(sconn->backup_replace_ip);
1232 silc_schedule_task_del_by_callback(server->schedule,
1233 silc_server_failure_callback);
1234 silc_server_disconnect_remote(server, sock,
1235 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1239 /* Free old protocol as it is finished now */
1240 silc_protocol_free(protocol);
1242 silc_packet_context_free(ctx->packet);
1244 sock->protocol = NULL;
1246 /* Allocate the authentication protocol. This is allocated here
1247 but we won't start it yet. We will be receiving party of this
1248 protocol thus we will wait that connecting party will make
1249 their first move. */
1250 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1251 &sock->protocol, proto_ctx,
1252 silc_server_connect_to_router_final);
1254 /* Register timeout task. If the protocol is not executed inside
1255 this timelimit the connection will be terminated. */
1256 proto_ctx->timeout_task =
1257 silc_schedule_task_add(server->schedule, sock->sock,
1258 silc_server_timeout_remote,
1260 server->config->conn_auth_timeout, 0,
1264 /* Run the protocol */
1265 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1268 /* Finalizes the connection to router. Registers a server task to the
1269 queue so that we can accept new connections. */
1271 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1273 SilcProtocol protocol = (SilcProtocol)context;
1274 SilcServerConnAuthInternalContext *ctx =
1275 (SilcServerConnAuthInternalContext *)protocol->context;
1276 SilcServer server = (SilcServer)ctx->server;
1277 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1278 SilcSocketConnection sock = ctx->sock;
1279 SilcServerEntry id_entry = NULL;
1281 unsigned char *id_string;
1283 SilcIDListData idata;
1284 SilcServerConfigRouter *conn = NULL;
1285 SilcServerConfigConnParams *param = NULL;
1287 SILC_LOG_DEBUG(("Start"));
1289 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1290 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1291 /* Error occured during protocol */
1292 silc_free(ctx->dest_id);
1293 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1296 /* Try reconnecting if configuration wants it */
1297 if (!sconn->no_reconnect) {
1298 silc_schedule_task_add(server->schedule, 0,
1299 silc_server_connect_to_router_retry,
1300 sconn, 0, 1, SILC_TASK_TIMEOUT,
1301 SILC_TASK_PRI_NORMAL);
1308 /* Add a task to the queue. This task receives new connections to the
1309 server. This task remains on the queue until the end of the program. */
1310 if (!server->listenning && !sconn->backup) {
1311 silc_schedule_task_add(server->schedule, server->sock,
1312 silc_server_accept_new_connection,
1313 (void *)server, 0, 0,
1315 SILC_TASK_PRI_NORMAL);
1316 server->listenning = TRUE;
1319 /* Send NEW_SERVER packet to the router. We will become registered
1320 to the SILC network after sending this packet. */
1321 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1322 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1323 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1324 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1325 silc_buffer_format(packet,
1326 SILC_STR_UI_SHORT(id_len),
1327 SILC_STR_UI_XNSTRING(id_string, id_len),
1328 SILC_STR_UI_SHORT(strlen(server->server_name)),
1329 SILC_STR_UI_XNSTRING(server->server_name,
1330 strlen(server->server_name)),
1333 /* Send the packet */
1334 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1335 packet->data, packet->len, TRUE);
1336 silc_buffer_free(packet);
1337 silc_free(id_string);
1339 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1341 /* Check that we do not have this ID already */
1342 id_entry = silc_idlist_find_server_by_id(server->local_list,
1343 ctx->dest_id, TRUE, NULL);
1345 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1347 id_entry = silc_idlist_find_server_by_id(server->global_list,
1348 ctx->dest_id, TRUE, NULL);
1350 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1353 SILC_LOG_DEBUG(("New server id(%s)",
1354 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1356 /* Add the connected router to global server list. Router is sent
1357 as NULL since it's local to us. */
1358 id_entry = silc_idlist_add_server(server->global_list,
1359 strdup(sock->hostname),
1360 SILC_ROUTER, ctx->dest_id, NULL, sock);
1362 silc_free(ctx->dest_id);
1363 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1364 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1369 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1370 silc_free(sock->user_data);
1371 sock->user_data = (void *)id_entry;
1372 sock->type = SILC_SOCKET_TYPE_ROUTER;
1373 idata = (SilcIDListData)sock->user_data;
1374 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1375 SILC_IDLIST_STATUS_LOCAL);
1377 conn = sconn->conn.ref_ptr;
1378 param = &server->config->param;
1379 if (conn && conn->param)
1380 param = conn->param;
1382 /* Perform keepalive. */
1383 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
1384 silc_server_perform_heartbeat,
1387 /* Register re-key timeout */
1388 idata->rekey->timeout = param->key_exchange_rekey;
1389 silc_schedule_task_add(server->schedule, sock->sock,
1390 silc_server_rekey_callback,
1391 (void *)sock, idata->rekey->timeout, 0,
1392 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1394 if (!sconn->backup) {
1395 /* Mark this router our primary router if we're still standalone */
1396 if (server->standalone) {
1397 SILC_LOG_DEBUG(("This connection is our primary router"));
1398 server->id_entry->router = id_entry;
1399 server->router = id_entry;
1400 server->standalone = FALSE;
1402 /* If we are router then announce our possible servers. Backup
1403 router announces also global servers. */
1404 if (server->server_type == SILC_ROUTER)
1405 silc_server_announce_servers(server,
1406 server->backup_router ? TRUE : FALSE,
1407 0, SILC_PRIMARY_ROUTE(server));
1409 /* Announce our clients and channels to the router */
1410 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1411 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1413 /* If we are backup router then this primary router is whom we are
1415 if (server->server_type == SILC_BACKUP_ROUTER)
1416 silc_server_backup_add(server, server->id_entry, sock->ip,
1417 sconn->remote_port, TRUE);
1420 /* Add this server to be our backup router */
1421 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1422 sconn->backup_replace_port, FALSE);
1425 sock->protocol = NULL;
1428 /* Call the completion callback to indicate that we've connected to
1430 if (sconn && sconn->callback)
1431 (*sconn->callback)(server, id_entry, sconn->callback_context);
1433 /* Free the temporary connection data context */
1435 silc_server_config_unref(&sconn->conn);
1436 silc_free(sconn->remote_host);
1437 silc_free(sconn->backup_replace_ip);
1440 if (sconn == server->router_conn)
1441 server->router_conn = NULL;
1444 /* Free the protocol object */
1445 if (sock->protocol == protocol)
1446 sock->protocol = NULL;
1447 silc_protocol_free(protocol);
1449 silc_packet_context_free(ctx->packet);
1451 silc_ske_free(ctx->ske);
1452 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1453 silc_free(ctx->auth_data);
1457 /* Host lookup callback that is called after the incoming connection's
1458 IP and FQDN lookup is performed. This will actually check the acceptance
1459 of the incoming connection and will register the key exchange protocol
1460 for this connection. */
1463 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1466 SilcServerKEInternalContext *proto_ctx =
1467 (SilcServerKEInternalContext *)context;
1468 SilcServer server = (SilcServer)proto_ctx->server;
1469 SilcServerConfigClient *cconfig = NULL;
1470 SilcServerConfigServer *sconfig = NULL;
1471 SilcServerConfigRouter *rconfig = NULL;
1472 SilcServerConfigDeny *deny;
1475 /* Check whether we could resolve both IP and FQDN. */
1476 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1477 server->config->require_reverse_lookup)) {
1478 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1479 sock->hostname ? sock->hostname :
1480 sock->ip ? sock->ip : ""));
1481 server->stat.conn_failures++;
1482 silc_server_disconnect_remote(server, sock,
1483 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1484 "Unknown host or IP");
1485 silc_free(proto_ctx);
1489 /* Register the connection for network input and output. This sets
1490 that scheduler will listen for incoming packets for this connection
1491 and sets that outgoing packets may be sent to this connection as well.
1492 However, this doesn't set the scheduler for outgoing traffic, it
1493 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1494 later when outgoing data is available. */
1495 context = (void *)server;
1496 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1498 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1501 /* Listenning port */
1502 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1503 silc_server_disconnect_remote(server, sock,
1504 SILC_STATUS_ERR_RESOURCE_LIMIT,
1505 "Connection refused");
1506 server->stat.conn_failures++;
1507 silc_free(proto_ctx);
1510 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1512 /* Check whether this connection is denied to connect to us. */
1513 deny = silc_server_config_find_denied(server, sock->ip);
1515 deny = silc_server_config_find_denied(server, sock->hostname);
1517 /* The connection is denied */
1518 SILC_LOG_INFO(("Connection %s (%s) is denied",
1519 sock->hostname, sock->ip));
1520 silc_server_disconnect_remote(server, sock,
1521 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1523 server->stat.conn_failures++;
1524 silc_free(proto_ctx);
1528 /* Check whether we have configured this sort of connection at all. We
1529 have to check all configurations since we don't know what type of
1530 connection this is. */
1531 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1532 cconfig = silc_server_config_find_client(server, sock->hostname);
1533 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1534 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1535 if (server->server_type == SILC_ROUTER) {
1536 if (!(rconfig = silc_server_config_find_router_conn(server,
1537 sock->ip, sock->port)))
1538 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1541 if (!cconfig && !sconfig && !rconfig) {
1542 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1544 silc_server_disconnect_remote(server, sock,
1545 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1546 server->stat.conn_failures++;
1547 silc_free(proto_ctx);
1551 /* The connection is allowed */
1553 /* Set internal context for key exchange protocol. This is
1554 sent as context for the protocol. */
1555 proto_ctx->sock = sock;
1556 proto_ctx->rng = server->rng;
1557 proto_ctx->responder = TRUE;
1558 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1559 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1560 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1562 /* Take flags for key exchange. Since we do not know what type of connection
1563 this is, we go through all found configurations and use the global ones
1564 as well. This will result always into strictest key exchange flags. */
1565 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1566 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1567 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1568 if (server->config->param.key_exchange_pfs)
1569 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1571 /* Prepare the connection for key exchange protocol. We allocate the
1572 protocol but will not start it yet. The connector will be the
1573 initiator of the protocol thus we will wait for initiation from
1574 there before we start the protocol. */
1575 server->stat.auth_attempts++;
1576 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1577 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1578 &sock->protocol, proto_ctx,
1579 silc_server_accept_new_connection_second);
1581 /* Register a timeout task that will be executed if the connector
1582 will not start the key exchange protocol within specified timeout
1583 and the connection will be closed. */
1584 proto_ctx->timeout_task =
1585 silc_schedule_task_add(server->schedule, sock->sock,
1586 silc_server_timeout_remote,
1588 server->config->key_exchange_timeout, 0,
1593 /* Accepts new connections to the server. Accepting new connections are
1594 done in three parts to make it async. */
1596 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1598 SilcServer server = (SilcServer)context;
1599 SilcSocketConnection newsocket;
1600 SilcServerKEInternalContext *proto_ctx;
1603 SILC_LOG_DEBUG(("Accepting new connection"));
1605 server->stat.conn_attempts++;
1607 sock = silc_net_accept_connection(fd);
1609 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1610 server->stat.conn_failures++;
1614 /* Check for maximum allowed connections */
1615 if (sock > server->config->param.connections_max) {
1616 SILC_LOG_ERROR(("Refusing connection, server is full"));
1617 server->stat.conn_failures++;
1618 silc_net_close_connection(sock);
1622 /* Set socket options */
1623 silc_net_set_socket_nonblock(sock);
1624 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1626 /* We don't create a ID yet, since we don't know what type of connection
1627 this is yet. But, we do add the connection to the socket table. */
1628 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1629 server->sockets[sock] = newsocket;
1631 /* Perform asynchronous host lookup. This will lookup the IP and the
1632 FQDN of the remote connection. After the lookup is done the connection
1633 is accepted further. */
1634 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1635 proto_ctx->server = server;
1636 proto_ctx->context = (void *)fd;
1637 silc_socket_host_lookup(newsocket, TRUE,
1638 silc_server_accept_new_connection_lookup,
1639 (void *)proto_ctx, server->schedule);
1642 /* Second part of accepting new connection. Key exchange protocol has been
1643 performed and now it is time to do little connection authentication
1644 protocol to figure out whether this connection is client or server
1645 and whether it has right to access this server (especially server
1646 connections needs to be authenticated). */
1648 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1650 SilcProtocol protocol = (SilcProtocol)context;
1651 SilcServerKEInternalContext *ctx =
1652 (SilcServerKEInternalContext *)protocol->context;
1653 SilcServer server = (SilcServer)ctx->server;
1654 SilcSocketConnection sock = ctx->sock;
1655 SilcServerConnAuthInternalContext *proto_ctx;
1657 SILC_LOG_DEBUG(("Start"));
1659 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1660 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1661 /* Error occured during protocol */
1662 SILC_LOG_DEBUG(("Error key exchange protocol"));
1663 silc_protocol_free(protocol);
1664 sock->protocol = NULL;
1665 silc_ske_free_key_material(ctx->keymat);
1667 silc_packet_context_free(ctx->packet);
1669 silc_ske_free(ctx->ske);
1670 silc_free(ctx->dest_id);
1671 silc_server_config_unref(&ctx->cconfig);
1672 silc_server_config_unref(&ctx->sconfig);
1673 silc_server_config_unref(&ctx->rconfig);
1675 silc_schedule_task_del_by_callback(server->schedule,
1676 silc_server_failure_callback);
1677 silc_server_disconnect_remote(server, sock,
1678 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1680 server->stat.auth_failures++;
1684 /* We now have the key material as the result of the key exchange
1685 protocol. Take the key material into use. Free the raw key material
1686 as soon as we've set them into use. */
1687 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1688 ctx->sock, ctx->keymat,
1689 ctx->ske->prop->cipher,
1690 ctx->ske->prop->pkcs,
1691 ctx->ske->prop->hash,
1692 ctx->ske->prop->hmac,
1693 ctx->ske->prop->group,
1695 SILC_LOG_ERROR(("Error setting key material in use"));
1696 silc_protocol_free(protocol);
1697 sock->protocol = NULL;
1698 silc_ske_free_key_material(ctx->keymat);
1700 silc_packet_context_free(ctx->packet);
1702 silc_ske_free(ctx->ske);
1703 silc_free(ctx->dest_id);
1704 silc_server_config_unref(&ctx->cconfig);
1705 silc_server_config_unref(&ctx->sconfig);
1706 silc_server_config_unref(&ctx->rconfig);
1708 silc_schedule_task_del_by_callback(server->schedule,
1709 silc_server_failure_callback);
1710 silc_server_disconnect_remote(server, sock,
1711 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1712 server->stat.auth_failures++;
1715 silc_ske_free_key_material(ctx->keymat);
1717 /* Allocate internal context for the authentication protocol. This
1718 is sent as context for the protocol. */
1719 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1720 proto_ctx->server = (void *)server;
1721 proto_ctx->sock = sock;
1722 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1723 proto_ctx->responder = TRUE;
1724 proto_ctx->dest_id_type = ctx->dest_id_type;
1725 proto_ctx->dest_id = ctx->dest_id;
1726 proto_ctx->cconfig = ctx->cconfig;
1727 proto_ctx->sconfig = ctx->sconfig;
1728 proto_ctx->rconfig = ctx->rconfig;
1730 /* Free old protocol as it is finished now */
1731 silc_protocol_free(protocol);
1733 silc_packet_context_free(ctx->packet);
1735 sock->protocol = NULL;
1737 /* Allocate the authentication protocol. This is allocated here
1738 but we won't start it yet. We will be receiving party of this
1739 protocol thus we will wait that connecting party will make
1740 their first move. */
1741 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1742 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1743 &sock->protocol, proto_ctx,
1744 silc_server_accept_new_connection_final);
1746 /* Register timeout task. If the protocol is not executed inside
1747 this timelimit the connection will be terminated. */
1748 proto_ctx->timeout_task =
1749 silc_schedule_task_add(server->schedule, sock->sock,
1750 silc_server_timeout_remote,
1752 server->config->conn_auth_timeout, 0,
1757 /* After this is called, server don't wait for backup router anymore.
1758 This gets called automatically even after we have backup router
1759 connection established. */
1761 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1763 SilcServer server = context;
1764 server->wait_backup = FALSE;
1767 /* Final part of accepting new connection. The connection has now
1768 been authenticated and keys has been exchanged. We also know whether
1769 this is client or server connection. */
1771 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1773 SilcProtocol protocol = (SilcProtocol)context;
1774 SilcServerConnAuthInternalContext *ctx =
1775 (SilcServerConnAuthInternalContext *)protocol->context;
1776 SilcServer server = (SilcServer)ctx->server;
1777 SilcSocketConnection sock = ctx->sock;
1778 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1780 SilcServerConfigConnParams *param = &server->config->param;
1782 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1783 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1784 /* Error occured during protocol */
1785 SILC_LOG_DEBUG(("Error during authentication protocol"));
1786 silc_protocol_free(protocol);
1787 sock->protocol = NULL;
1789 silc_packet_context_free(ctx->packet);
1791 silc_ske_free(ctx->ske);
1792 silc_free(ctx->dest_id);
1793 silc_server_config_unref(&ctx->cconfig);
1794 silc_server_config_unref(&ctx->sconfig);
1795 silc_server_config_unref(&ctx->rconfig);
1797 silc_schedule_task_del_by_callback(server->schedule,
1798 silc_server_failure_callback);
1799 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1801 server->stat.auth_failures++;
1805 entry->data.last_receive = time(NULL);
1807 switch (ctx->conn_type) {
1808 case SILC_SOCKET_TYPE_CLIENT:
1810 SilcClientEntry client;
1811 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1813 /* Verify whether this connection is after all allowed to connect */
1814 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1815 &server->config->param,
1816 conn->param, ctx->ske)) {
1817 server->stat.auth_failures++;
1821 /* If we are primary router and we have backup router configured
1822 but it has not connected to use yet, do not accept any other
1824 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1825 !server->backup_router) {
1826 SilcServerConfigRouter *router;
1827 router = silc_server_config_get_backup_router(server);
1828 if (router && strcmp(server->config->server_info->primary->server_ip,
1830 silc_server_find_socket_by_host(server,
1831 SILC_SOCKET_TYPE_SERVER,
1832 router->backup_replace_ip, 0)) {
1833 SILC_LOG_INFO(("Will not accept connections because we do "
1834 "not have backup router connection established"));
1835 silc_server_disconnect_remote(server, sock,
1836 SILC_STATUS_ERR_PERM_DENIED,
1837 "We do not have connection to backup "
1838 "router established, try later");
1839 silc_free(sock->user_data);
1840 server->stat.auth_failures++;
1842 /* From here on, wait 10 seconds for the backup router to appear. */
1843 silc_schedule_task_add(server->schedule, 0,
1844 silc_server_backup_router_wait,
1845 (void *)server, 10, 0,
1846 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1851 SILC_LOG_DEBUG(("Remote host is client"));
1852 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1855 /* Add the client to the client ID cache. The nickname and Client ID
1856 and other information is created after we have received NEW_CLIENT
1857 packet from client. */
1858 client = silc_idlist_add_client(server->local_list,
1859 NULL, NULL, NULL, NULL, NULL, sock, 0);
1861 SILC_LOG_ERROR(("Could not add new client to cache"));
1862 silc_free(sock->user_data);
1863 silc_server_disconnect_remote(server, sock,
1864 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1865 server->stat.auth_failures++;
1868 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1871 server->stat.my_clients++;
1872 server->stat.clients++;
1873 server->stat.cell_clients++;
1875 /* Get connection parameters */
1877 param = conn->param;
1879 if (!param->keepalive_secs)
1880 param->keepalive_secs = server->config->param.keepalive_secs;
1882 if (!param->qos && server->config->param.qos) {
1883 param->qos = server->config->param.qos;
1884 param->qos_rate_limit = server->config->param.qos_rate_limit;
1885 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1886 param->qos_limit_sec = server->config->param.qos_limit_sec;
1887 param->qos_limit_usec = server->config->param.qos_limit_usec;
1890 /* Check if to be anonymous connection */
1891 if (param->anonymous)
1892 client->mode |= SILC_UMODE_ANONYMOUS;
1895 id_entry = (void *)client;
1898 case SILC_SOCKET_TYPE_SERVER:
1899 case SILC_SOCKET_TYPE_ROUTER:
1901 SilcServerEntry new_server;
1902 bool initiator = FALSE;
1903 bool backup_local = FALSE;
1904 bool backup_router = FALSE;
1905 char *backup_replace_ip = NULL;
1906 SilcUInt16 backup_replace_port = 0;
1907 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1908 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1910 /* If we are backup router and this is incoming server connection
1911 and we do not have connection to primary router, do not allow
1913 if (server->server_type == SILC_BACKUP_ROUTER &&
1914 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1915 !SILC_PRIMARY_ROUTE(server)) {
1916 SILC_LOG_INFO(("Will not accept server connection because we do "
1917 "not have primary router connection established"));
1918 silc_server_disconnect_remote(server, sock,
1919 SILC_STATUS_ERR_PERM_DENIED,
1920 "We do not have connection to primary "
1921 "router established, try later");
1922 silc_free(sock->user_data);
1923 server->stat.auth_failures++;
1927 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1928 /* Verify whether this connection is after all allowed to connect */
1929 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1930 &server->config->param,
1931 rconn ? rconn->param : NULL,
1933 silc_free(sock->user_data);
1934 server->stat.auth_failures++;
1940 param = rconn->param;
1942 if (!param->keepalive_secs)
1943 param->keepalive_secs = server->config->param.keepalive_secs;
1945 if (!param->qos && server->config->param.qos) {
1946 param->qos = server->config->param.qos;
1947 param->qos_rate_limit = server->config->param.qos_rate_limit;
1948 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1949 param->qos_limit_sec = server->config->param.qos_limit_sec;
1950 param->qos_limit_usec = server->config->param.qos_limit_usec;
1954 initiator = rconn->initiator;
1955 backup_local = rconn->backup_local;
1956 backup_router = rconn->backup_router;
1957 backup_replace_ip = rconn->backup_replace_ip;
1958 backup_replace_port = rconn->backup_replace_port;
1962 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1963 /* Verify whether this connection is after all allowed to connect */
1964 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1965 &server->config->param,
1966 sconn ? sconn->param : NULL,
1968 silc_free(sock->user_data);
1969 server->stat.auth_failures++;
1974 param = sconn->param;
1976 if (!param->keepalive_secs)
1977 param->keepalive_secs = server->config->param.keepalive_secs;
1979 if (!param->qos && server->config->param.qos) {
1980 param->qos = server->config->param.qos;
1981 param->qos_rate_limit = server->config->param.qos_rate_limit;
1982 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
1983 param->qos_limit_sec = server->config->param.qos_limit_sec;
1984 param->qos_limit_usec = server->config->param.qos_limit_usec;
1988 backup_router = sconn->backup_router;
1992 /* If we are primary router and we have backup router configured
1993 but it has not connected to use yet, do not accept any other
1995 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1996 !server->backup_router && !backup_router) {
1997 SilcServerConfigRouter *router;
1998 router = silc_server_config_get_backup_router(server);
1999 if (router && strcmp(server->config->server_info->primary->server_ip,
2001 silc_server_find_socket_by_host(server,
2002 SILC_SOCKET_TYPE_SERVER,
2003 router->backup_replace_ip, 0)) {
2004 SILC_LOG_INFO(("Will not accept connections because we do "
2005 "not have backup router connection established"));
2006 silc_server_disconnect_remote(server, sock,
2007 SILC_STATUS_ERR_PERM_DENIED,
2008 "We do not have connection to backup "
2009 "router established, try later");
2010 silc_free(sock->user_data);
2011 server->stat.auth_failures++;
2013 /* From here on, wait 10 seconds for the backup router to appear. */
2014 silc_schedule_task_add(server->schedule, 0,
2015 silc_server_backup_router_wait,
2016 (void *)server, 10, 0,
2017 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2022 SILC_LOG_DEBUG(("Remote host is %s",
2023 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2024 "server" : (backup_router ?
2025 "backup router" : "router")));
2026 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
2027 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2028 "server" : (backup_router ?
2029 "backup router" : "router")));
2031 /* Add the server into server cache. The server name and Server ID
2032 is updated after we have received NEW_SERVER packet from the
2033 server. We mark ourselves as router for this server if we really
2036 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2037 server->local_list : (backup_router ?
2038 server->local_list :
2039 server->global_list)),
2041 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2042 SILC_SERVER : SILC_ROUTER),
2044 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
2045 server->id_entry : (backup_router ?
2046 server->id_entry : NULL)),
2049 SILC_LOG_ERROR(("Could not add new server to cache"));
2050 silc_free(sock->user_data);
2051 silc_server_disconnect_remote(server, sock,
2052 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2053 server->stat.auth_failures++;
2056 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2058 id_entry = (void *)new_server;
2060 /* If the incoming connection is router and marked as backup router
2061 then add it to be one of our backups */
2062 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
2063 /* Change it back to SERVER type since that's what it really is. */
2065 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
2066 new_server->server_type = SILC_BACKUP_ROUTER;
2068 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2069 ("Backup router %s is now online",
2072 /* Remove the backup waiting with timeout */
2073 silc_schedule_task_add(server->schedule, 0,
2074 silc_server_backup_router_wait,
2075 (void *)server, 5, 0,
2076 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2080 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
2081 server->stat.my_servers++;
2083 server->stat.my_routers++;
2084 server->stat.routers++;
2086 server->stat.servers++;
2088 /* Check whether this connection is to be our primary router connection
2089 if we do not already have the primary route. */
2090 if (!backup_router &&
2091 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
2092 if (silc_server_config_is_primary_route(server) && !initiator)
2095 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2096 server->standalone = FALSE;
2097 if (!server->id_entry->router) {
2098 server->id_entry->router = id_entry;
2099 server->router = id_entry;
2110 sock->type = ctx->conn_type;
2112 /* Add the common data structure to the ID entry. */
2113 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
2115 /* Add to sockets internal pointer for fast referencing */
2116 silc_free(sock->user_data);
2117 sock->user_data = id_entry;
2119 /* Connection has been fully established now. Everything is ok. */
2120 SILC_LOG_DEBUG(("New connection authenticated"));
2122 /* Perform keepalive. */
2123 if (param->keepalive_secs)
2124 silc_socket_set_heartbeat(sock, param->keepalive_secs, server,
2125 silc_server_perform_heartbeat,
2128 /* Perform Quality of Service */
2130 silc_socket_set_qos(sock, param->qos_rate_limit, param->qos_bytes_limit,
2131 param->qos_limit_sec, param->qos_limit_usec,
2135 silc_schedule_task_del_by_callback(server->schedule,
2136 silc_server_failure_callback);
2137 silc_protocol_free(protocol);
2139 silc_packet_context_free(ctx->packet);
2141 silc_ske_free(ctx->ske);
2142 silc_free(ctx->dest_id);
2143 silc_server_config_unref(&ctx->cconfig);
2144 silc_server_config_unref(&ctx->sconfig);
2145 silc_server_config_unref(&ctx->rconfig);
2147 sock->protocol = NULL;
2150 /* This function is used to read packets from network and send packets to
2151 network. This is usually a generic task. */
2153 SILC_TASK_CALLBACK(silc_server_packet_process)
2155 SilcServer server = (SilcServer)context;
2156 SilcSocketConnection sock = server->sockets[fd];
2157 SilcIDListData idata;
2158 SilcCipher cipher = NULL;
2159 SilcHmac hmac = NULL;
2160 SilcUInt32 sequence = 0;
2164 SILC_LOG_DEBUG(("Unknown socket connection"));
2168 /* Packet sending */
2170 if (type == SILC_TASK_WRITE) {
2171 /* Do not send data to disconnected connection */
2172 if (SILC_IS_DISCONNECTED(sock)) {
2173 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2177 server->stat.packets_sent++;
2179 /* Send the packet */
2180 ret = silc_packet_send(sock, TRUE);
2182 /* If returned -2 could not write to connection now, will do
2187 /* The packet has been sent and now it is time to set the connection
2188 back to only for input. When there is again some outgoing data
2189 available for this connection it will be set for output as well.
2190 This call clears the output setting and sets it only for input. */
2191 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2192 SILC_UNSET_OUTBUF_PENDING(sock);
2193 silc_buffer_clear(sock->outbuf);
2196 SILC_LOG_ERROR(("Error sending packet to connection "
2197 "%s:%d [%s]", sock->hostname, sock->port,
2198 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2199 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2200 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2206 /* Packet receiving */
2208 /* Read some data from connection */
2209 ret = silc_packet_receive(sock);
2213 SILC_LOG_ERROR(("Error receiving packet from connection "
2214 "%s:%d [%s] %s", sock->hostname, sock->port,
2215 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2216 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2217 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2218 "Router"), strerror(errno)));
2224 SILC_LOG_DEBUG(("Read EOF"));
2226 /* If connection is disconnecting already we will finally
2227 close the connection */
2228 if (SILC_IS_DISCONNECTING(sock)) {
2229 if (sock->user_data)
2230 silc_server_free_sock_user_data(server, sock, NULL);
2231 silc_server_close_connection(server, sock);
2235 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2236 SILC_SET_DISCONNECTING(sock);
2238 if (sock->user_data) {
2240 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2241 silc_server_free_sock_user_data(server, sock, tmp);
2243 silc_server_free_sock_user_data(server, sock, NULL);
2244 } else if (server->router_conn && server->router_conn->sock == sock &&
2245 !server->router && server->standalone)
2246 silc_schedule_task_add(server->schedule, 0,
2247 silc_server_connect_to_router,
2250 SILC_TASK_PRI_NORMAL);
2252 silc_server_close_connection(server, sock);
2256 /* If connection is disconnecting or disconnected we will ignore
2258 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2259 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2263 /* Get keys and stuff from ID entry */
2264 idata = (SilcIDListData)sock->user_data;
2266 cipher = idata->receive_key;
2267 hmac = idata->hmac_receive;
2268 sequence = idata->psn_receive;
2271 /* Process the packet. This will call the parser that will then
2272 decrypt and parse the packet. */
2273 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2274 TRUE : FALSE, cipher, hmac, sequence,
2275 silc_server_packet_parse, server);
2277 /* If processing failed the connection is closed. */
2279 /* On packet processing errors we may close our primary router
2280 connection but won't become primary router if we are the backup
2281 since this is local error condition. */
2282 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2283 server->backup_noswitch = TRUE;
2285 if (sock->user_data)
2286 silc_server_free_sock_user_data(server, sock, NULL);
2287 silc_server_close_connection(server, sock);
2291 /* Parses whole packet, received earlier. */
2293 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2295 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2296 SilcServer server = (SilcServer)parse_ctx->context;
2297 SilcSocketConnection sock = parse_ctx->sock;
2298 SilcPacketContext *packet = parse_ctx->packet;
2299 SilcIDListData idata = (SilcIDListData)sock->user_data;
2302 server->stat.packets_received++;
2304 /* Parse the packet */
2305 if (parse_ctx->normal)
2306 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2308 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2310 /* If entry is disabled ignore what we got. */
2311 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED &&
2312 ret != SILC_PACKET_HEARTBEAT && ret != SILC_PACKET_RESUME_ROUTER &&
2313 ret != SILC_PACKET_REKEY && ret != SILC_PACKET_REKEY_DONE) {
2314 SILC_LOG_DEBUG(("Connection is disabled"));
2318 if (ret == SILC_PACKET_NONE) {
2319 SILC_LOG_DEBUG(("Error parsing packet"));
2323 /* Check that the the current client ID is same as in the client's packet. */
2324 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2325 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2326 if (client && client->id && packet->src_id) {
2327 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2328 packet->src_id_type);
2329 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2331 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2338 if (server->server_type == SILC_ROUTER) {
2339 /* Route the packet if it is not destined to us. Other ID types but
2340 server are handled separately after processing them. */
2341 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2342 packet->dst_id_type == SILC_ID_SERVER &&
2343 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2344 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2346 /* Route the packet to fastest route for the destination ID */
2347 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2348 packet->dst_id_type);
2351 silc_server_packet_route(server,
2352 silc_server_route_get(server, id,
2353 packet->dst_id_type),
2360 /* Parse the incoming packet type */
2361 silc_server_packet_parse_type(server, sock, packet);
2363 /* Broadcast packet if it is marked as broadcast packet and it is
2364 originated from router and we are router. */
2365 if (server->server_type == SILC_ROUTER &&
2366 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2367 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2368 /* Broadcast to our primary route */
2369 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2371 /* If we have backup routers then we need to feed all broadcast
2372 data to those servers. */
2373 silc_server_backup_broadcast(server, sock, packet);
2377 silc_packet_context_free(packet);
2378 silc_free(parse_ctx);
2381 /* Parser callback called by silc_packet_receive_process. This merely
2382 registers timeout that will handle the actual parsing when appropriate. */
2384 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2387 SilcServer server = (SilcServer)context;
2388 SilcSocketConnection sock = parser_context->sock;
2389 SilcIDListData idata = (SilcIDListData)sock->user_data;
2393 idata->psn_receive = parser_context->packet->sequence + 1;
2395 /* If protocol for this connection is key exchange or rekey then we'll
2396 process all packets synchronously, since there might be packets in
2397 queue that we are not able to decrypt without first processing the
2398 packets before them. */
2399 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2400 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2401 (sock->protocol && sock->protocol->protocol &&
2402 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2403 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2404 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2407 /* Reprocess data since we'll return FALSE here. This is because
2408 the idata->receive_key might have become valid in the last packet
2409 and we want to call this processor with valid cipher. */
2411 ret = silc_packet_receive_process(
2412 sock, server->server_type == SILC_ROUTER ?
2413 TRUE : FALSE, idata->receive_key,
2414 idata->hmac_receive, idata->psn_receive,
2415 silc_server_packet_parse, server);
2417 ret = silc_packet_receive_process(
2418 sock, server->server_type == SILC_ROUTER ?
2419 TRUE : FALSE, NULL, NULL, 0,
2420 silc_server_packet_parse, server);
2423 /* On packet processing errors we may close our primary router
2424 connection but won't become primary router if we are the backup
2425 since this is local error condition. */
2426 if (SILC_PRIMARY_ROUTE(server) == sock && server->backup_router)
2427 server->backup_noswitch = TRUE;
2429 if (sock->user_data)
2430 silc_server_free_sock_user_data(server, sock, NULL);
2431 silc_server_close_connection(server, sock);
2437 switch (sock->type) {
2438 case SILC_SOCKET_TYPE_UNKNOWN:
2439 case SILC_SOCKET_TYPE_CLIENT:
2440 /* Parse the packet with timeout */
2441 silc_schedule_task_add(server->schedule, sock->sock,
2442 silc_server_packet_parse_real,
2443 (void *)parser_context, 0, 100000,
2445 SILC_TASK_PRI_NORMAL);
2447 case SILC_SOCKET_TYPE_SERVER:
2448 case SILC_SOCKET_TYPE_ROUTER:
2449 /* Packets from servers are parsed immediately */
2450 silc_server_packet_parse_real(server->schedule, server, 0, sock->sock,
2460 /* Parses the packet type and calls what ever routines the packet type
2461 requires. This is done for all incoming packets. */
2463 void silc_server_packet_parse_type(SilcServer server,
2464 SilcSocketConnection sock,
2465 SilcPacketContext *packet)
2467 SilcPacketType type = packet->type;
2468 SilcIDListData idata = (SilcIDListData)sock->user_data;
2470 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2471 silc_get_packet_name(type), packet->flags));
2473 /* Parse the packet type */
2475 case SILC_PACKET_DISCONNECT:
2478 char *message = NULL;
2480 if (packet->flags & SILC_PACKET_FLAG_LIST)
2482 if (packet->buffer->len < 1)
2485 status = (SilcStatus)packet->buffer->data[0];
2486 if (packet->buffer->len > 1 &&
2487 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2488 message = silc_memdup(packet->buffer->data + 1,
2489 packet->buffer->len - 1);
2491 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2492 sock->ip, sock->hostname,
2493 silc_get_status_message(status), status,
2494 message ? message : ""));
2497 /* Handle the disconnection from our end too */
2498 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2499 silc_server_free_sock_user_data(server, sock, NULL);
2500 silc_server_close_connection(server, sock);
2504 case SILC_PACKET_SUCCESS:
2506 * Success received for something. For now we can have only
2507 * one protocol for connection executing at once hence this
2508 * success message is for whatever protocol is executing currently.
2510 if (packet->flags & SILC_PACKET_FLAG_LIST)
2513 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2516 case SILC_PACKET_FAILURE:
2518 * Failure received for something. For now we can have only
2519 * one protocol for connection executing at once hence this
2520 * failure message is for whatever protocol is executing currently.
2522 if (packet->flags & SILC_PACKET_FLAG_LIST)
2524 if (sock->protocol) {
2525 SilcServerFailureContext f;
2526 f = silc_calloc(1, sizeof(*f));
2527 f->sock = silc_socket_dup(sock);
2529 /* We will wait 5 seconds to process this failure packet */
2530 silc_schedule_task_add(server->schedule, sock->sock,
2531 silc_server_failure_callback, (void *)f, 5, 0,
2532 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2536 case SILC_PACKET_REJECT:
2537 if (packet->flags & SILC_PACKET_FLAG_LIST)
2542 case SILC_PACKET_NOTIFY:
2544 * Received notify packet. Server can receive notify packets from
2545 * router. Server then relays the notify messages to clients if needed.
2547 if (packet->flags & SILC_PACKET_FLAG_LIST)
2548 silc_server_notify_list(server, sock, packet);
2550 silc_server_notify(server, sock, packet);
2556 case SILC_PACKET_CHANNEL_MESSAGE:
2558 * Received channel message. Channel messages are special packets
2559 * (although probably most common ones) thus they are handled
2562 if (packet->flags & SILC_PACKET_FLAG_LIST)
2564 idata->last_receive = time(NULL);
2565 silc_server_channel_message(server, sock, packet);
2568 case SILC_PACKET_CHANNEL_KEY:
2570 * Received key for channel. As channels are created by the router
2571 * the keys are as well. We will distribute the key to all of our
2572 * locally connected clients on the particular channel. Router
2573 * never receives this channel and thus is ignored.
2575 if (packet->flags & SILC_PACKET_FLAG_LIST)
2577 silc_server_channel_key(server, sock, packet);
2583 case SILC_PACKET_COMMAND:
2585 * Recived command. Processes the command request and allocates the
2586 * command context and calls the command.
2588 if (packet->flags & SILC_PACKET_FLAG_LIST)
2590 silc_server_command_process(server, sock, packet);
2593 case SILC_PACKET_COMMAND_REPLY:
2595 * Received command reply packet. Received command reply to command. It
2596 * may be reply to command sent by us or reply to command sent by client
2597 * that we've routed further.
2599 if (packet->flags & SILC_PACKET_FLAG_LIST)
2601 silc_server_command_reply(server, sock, packet);
2605 * Private Message packets
2607 case SILC_PACKET_PRIVATE_MESSAGE:
2609 * Received private message packet. The packet is coming from either
2612 if (packet->flags & SILC_PACKET_FLAG_LIST)
2614 idata->last_receive = time(NULL);
2615 silc_server_private_message(server, sock, packet);
2618 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2620 * Private message key packet.
2622 if (packet->flags & SILC_PACKET_FLAG_LIST)
2624 silc_server_private_message_key(server, sock, packet);
2628 * Key Exchange protocol packets
2630 case SILC_PACKET_KEY_EXCHANGE:
2631 if (packet->flags & SILC_PACKET_FLAG_LIST)
2634 if (sock->protocol && sock->protocol->protocol &&
2635 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2636 SilcServerKEInternalContext *proto_ctx =
2637 (SilcServerKEInternalContext *)sock->protocol->context;
2639 proto_ctx->packet = silc_packet_context_dup(packet);
2641 /* Let the protocol handle the packet */
2642 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2644 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2645 "protocol active, packet dropped."));
2649 case SILC_PACKET_KEY_EXCHANGE_1:
2650 if (packet->flags & SILC_PACKET_FLAG_LIST)
2653 if (sock->protocol && sock->protocol->protocol &&
2654 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2655 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2657 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2658 SilcServerRekeyInternalContext *proto_ctx =
2659 (SilcServerRekeyInternalContext *)sock->protocol->context;
2661 if (proto_ctx->packet)
2662 silc_packet_context_free(proto_ctx->packet);
2664 proto_ctx->packet = silc_packet_context_dup(packet);
2666 /* Let the protocol handle the packet */
2667 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2669 SilcServerKEInternalContext *proto_ctx =
2670 (SilcServerKEInternalContext *)sock->protocol->context;
2672 if (proto_ctx->packet)
2673 silc_packet_context_free(proto_ctx->packet);
2675 proto_ctx->packet = silc_packet_context_dup(packet);
2676 proto_ctx->dest_id_type = packet->src_id_type;
2677 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2678 packet->src_id_type);
2679 if (!proto_ctx->dest_id)
2682 /* Let the protocol handle the packet */
2683 silc_protocol_execute(sock->protocol, server->schedule,
2687 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2688 "protocol active, packet dropped."));
2692 case SILC_PACKET_KEY_EXCHANGE_2:
2693 if (packet->flags & SILC_PACKET_FLAG_LIST)
2696 if (sock->protocol && sock->protocol->protocol &&
2697 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2698 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2700 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2701 SilcServerRekeyInternalContext *proto_ctx =
2702 (SilcServerRekeyInternalContext *)sock->protocol->context;
2704 if (proto_ctx->packet)
2705 silc_packet_context_free(proto_ctx->packet);
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 SilcServerKEInternalContext *proto_ctx =
2713 (SilcServerKEInternalContext *)sock->protocol->context;
2715 if (proto_ctx->packet)
2716 silc_packet_context_free(proto_ctx->packet);
2718 proto_ctx->packet = silc_packet_context_dup(packet);
2719 proto_ctx->dest_id_type = packet->src_id_type;
2720 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2721 packet->src_id_type);
2722 if (!proto_ctx->dest_id)
2725 /* Let the protocol handle the packet */
2726 silc_protocol_execute(sock->protocol, server->schedule,
2730 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2731 "protocol active, packet dropped."));
2735 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2737 * Connection authentication request packet. When we receive this packet
2738 * we will send to the other end information about our mandatory
2739 * authentication method for the connection. This packet maybe received
2742 if (packet->flags & SILC_PACKET_FLAG_LIST)
2744 silc_server_connection_auth_request(server, sock, packet);
2748 * Connection Authentication protocol packets
2750 case SILC_PACKET_CONNECTION_AUTH:
2751 /* Start of the authentication protocol. We receive here the
2752 authentication data and will verify it. */
2753 if (packet->flags & SILC_PACKET_FLAG_LIST)
2756 if (sock->protocol && sock->protocol->protocol->type
2757 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2759 SilcServerConnAuthInternalContext *proto_ctx =
2760 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2762 proto_ctx->packet = silc_packet_context_dup(packet);
2764 /* Let the protocol handle the packet */
2765 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2767 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2768 "protocol active, packet dropped."));
2772 case SILC_PACKET_NEW_ID:
2774 * Received New ID packet. This includes some new ID that has been
2775 * created. It may be for client, server or channel. This is the way
2776 * to distribute information about new registered entities in the
2779 if (packet->flags & SILC_PACKET_FLAG_LIST)
2780 silc_server_new_id_list(server, sock, packet);
2782 silc_server_new_id(server, sock, packet);
2785 case SILC_PACKET_NEW_CLIENT:
2787 * Received new client packet. This includes client information that
2788 * we will use to create initial client ID. After creating new
2789 * ID we will send it to the client.
2791 if (packet->flags & SILC_PACKET_FLAG_LIST)
2793 silc_server_new_client(server, sock, packet);
2796 case SILC_PACKET_NEW_SERVER:
2798 * Received new server packet. This includes Server ID and some other
2799 * information that we may save. This is received after server has
2802 if (packet->flags & SILC_PACKET_FLAG_LIST)
2804 silc_server_new_server(server, sock, packet);
2807 case SILC_PACKET_NEW_CHANNEL:
2809 * Received new channel packet. Information about new channel in the
2810 * network are distributed using this packet.
2812 if (packet->flags & SILC_PACKET_FLAG_LIST)
2813 silc_server_new_channel_list(server, sock, packet);
2815 silc_server_new_channel(server, sock, packet);
2818 case SILC_PACKET_HEARTBEAT:
2820 * Received heartbeat.
2822 if (packet->flags & SILC_PACKET_FLAG_LIST)
2826 case SILC_PACKET_KEY_AGREEMENT:
2828 * Received heartbeat.
2830 if (packet->flags & SILC_PACKET_FLAG_LIST)
2832 silc_server_key_agreement(server, sock, packet);
2835 case SILC_PACKET_REKEY:
2837 * Received re-key packet. The sender wants to regenerate the session
2840 if (packet->flags & SILC_PACKET_FLAG_LIST)
2842 silc_server_rekey(server, sock, packet);
2845 case SILC_PACKET_REKEY_DONE:
2847 * The re-key is done.
2849 if (packet->flags & SILC_PACKET_FLAG_LIST)
2852 if (sock->protocol && sock->protocol->protocol &&
2853 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2855 SilcServerRekeyInternalContext *proto_ctx =
2856 (SilcServerRekeyInternalContext *)sock->protocol->context;
2858 if (proto_ctx->packet)
2859 silc_packet_context_free(proto_ctx->packet);
2861 proto_ctx->packet = silc_packet_context_dup(packet);
2863 /* Let the protocol handle the packet */
2864 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2866 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2867 "protocol active, packet dropped."));
2871 case SILC_PACKET_FTP:
2873 if (packet->flags & SILC_PACKET_FLAG_LIST)
2875 silc_server_ftp(server, sock, packet);
2878 case SILC_PACKET_RESUME_CLIENT:
2880 if (packet->flags & SILC_PACKET_FLAG_LIST)
2882 silc_server_resume_client(server, sock, packet);
2885 case SILC_PACKET_RESUME_ROUTER:
2886 /* Resume router packet received. This packet is received for backup
2887 router resuming protocol. */
2888 if (packet->flags & SILC_PACKET_FLAG_LIST)
2890 silc_server_backup_resume_router(server, sock, packet);
2894 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2899 /* Creates connection to a remote router. */
2901 void silc_server_create_connection(SilcServer server,
2902 const char *remote_host, SilcUInt32 port)
2904 SilcServerConnection sconn;
2906 /* Allocate connection object for hold connection specific stuff. */
2907 sconn = silc_calloc(1, sizeof(*sconn));
2908 sconn->remote_host = strdup(remote_host);
2909 sconn->remote_port = port;
2910 sconn->no_reconnect = TRUE;
2912 silc_schedule_task_add(server->schedule, 0,
2913 silc_server_connect_router,
2914 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2915 SILC_TASK_PRI_NORMAL);
2918 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2920 silc_socket_free(context);
2923 /* Closes connection to socket connection */
2925 void silc_server_close_connection(SilcServer server,
2926 SilcSocketConnection sock)
2930 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2931 silc_schedule_task_add(server->schedule, 0,
2932 silc_server_close_connection_final,
2933 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2934 SILC_TASK_PRI_NORMAL);
2938 memset(tmp, 0, sizeof(tmp));
2939 silc_socket_get_error(sock, tmp, sizeof(tmp));
2940 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2942 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2943 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2944 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2945 "Router"), tmp[0] ? tmp : ""));
2947 /* We won't listen for this connection anymore */
2948 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2950 /* Unregister all tasks */
2951 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2953 /* Close the actual connection */
2954 silc_net_close_connection(sock->sock);
2955 server->sockets[sock->sock] = NULL;
2957 /* If sock->user_data is NULL then we'll check for active protocols
2958 here since the silc_server_free_sock_user_data has not been called
2959 for this connection. */
2960 if (!sock->user_data) {
2961 /* If any protocol is active cancel its execution. It will call
2962 the final callback which will finalize the disconnection. */
2963 if (sock->protocol) {
2964 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2965 silc_protocol_cancel(sock->protocol, server->schedule);
2966 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2967 silc_protocol_execute_final(sock->protocol, server->schedule);
2968 sock->protocol = NULL;
2973 silc_schedule_task_add(server->schedule, 0,
2974 silc_server_close_connection_final,
2975 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2976 SILC_TASK_PRI_NORMAL);
2979 /* Sends disconnect message to remote connection and disconnects the
2982 void silc_server_disconnect_remote(SilcServer server,
2983 SilcSocketConnection sock,
2984 SilcStatus status, ...)
2987 unsigned char buf[512];
2992 if (!sock || SILC_IS_DISCONNECTED(sock))
2995 memset(buf, 0, sizeof(buf));
2996 va_start(ap, status);
2997 cp = va_arg(ap, char *);
2999 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
3004 SILC_LOG_DEBUG(("Disconnecting remote host"));
3006 /* Notify remote end that the conversation is over. The notify message
3007 is tried to be sent immediately. */
3011 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
3013 buffer = silc_buffer_alloc_size(len);
3017 buffer->data[0] = status;
3019 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
3021 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
3022 buffer->data, buffer->len, TRUE);
3023 silc_buffer_free(buffer);
3026 silc_server_packet_queue_purge(server, sock);
3028 /* Mark the connection to be disconnected */
3029 SILC_SET_DISCONNECTED(sock);
3030 silc_server_close_connection(server, sock);
3033 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
3035 SilcServer server = app_context;
3036 SilcClientEntry client = context;
3038 assert(!silc_hash_table_count(client->channels));
3040 silc_idlist_del_data(client);
3041 silc_idcache_purge_by_context(server->local_list->clients, client);
3044 /* Frees client data and notifies about client's signoff. */
3046 void silc_server_free_client_data(SilcServer server,
3047 SilcSocketConnection sock,
3048 SilcClientEntry client,
3050 const char *signoff)
3052 SILC_LOG_DEBUG(("Freeing client data"));
3054 /* If there is pending outgoing data for the client then purge it
3055 to the network before removing the client entry. */
3056 silc_server_packet_queue_purge(server, sock);
3059 /* Check if anyone is watching this nickname */
3060 if (server->server_type == SILC_ROUTER)
3061 silc_server_check_watcher_list(server, client, NULL,
3062 SILC_NOTIFY_TYPE_SIGNOFF);
3064 /* Send SIGNOFF notify to routers. */
3066 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3067 SILC_BROADCAST(server), client->id,
3071 /* Remove client from all channels */
3073 silc_server_remove_from_channels(server, NULL, client,
3074 TRUE, (char *)signoff, TRUE);
3076 silc_server_remove_from_channels(server, NULL, client,
3077 FALSE, NULL, FALSE);
3079 /* Remove this client from watcher list if it is */
3080 silc_server_del_from_watcher_list(server, client);
3082 /* Update statistics */
3083 server->stat.my_clients--;
3084 server->stat.clients--;
3085 if (server->stat.cell_clients)
3086 server->stat.cell_clients--;
3087 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3088 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3089 silc_schedule_task_del_by_context(server->schedule, client);
3091 /* We will not delete the client entry right away. We will take it
3092 into history (for WHOWAS command) for 5 minutes, unless we're
3093 shutting down server. */
3094 if (!server->server_shutdown) {
3095 silc_schedule_task_add(server->schedule, 0,
3096 silc_server_free_client_data_timeout,
3098 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
3099 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3100 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
3102 client->router = NULL;
3103 client->connection = NULL;
3105 /* Delete directly since we're shutting down server */
3106 silc_idlist_del_data(client);
3107 silc_idlist_del_client(server->local_list, client);
3111 /* Frees user_data pointer from socket connection object. This also sends
3112 appropriate notify packets to the network to inform about leaving
3115 void silc_server_free_sock_user_data(SilcServer server,
3116 SilcSocketConnection sock,
3117 const char *signoff_message)
3119 switch (sock->type) {
3120 case SILC_SOCKET_TYPE_CLIENT:
3122 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
3123 silc_server_free_client_data(server, sock, user_data, TRUE,
3127 case SILC_SOCKET_TYPE_SERVER:
3128 case SILC_SOCKET_TYPE_ROUTER:
3130 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
3131 SilcServerEntry backup_router = NULL;
3133 SILC_LOG_DEBUG(("Freeing server data"));
3136 backup_router = silc_server_backup_get(server, user_data->id);
3138 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3139 backup_router == server->id_entry &&
3140 sock->type != SILC_SOCKET_TYPE_ROUTER)
3141 backup_router = NULL;
3143 if (server->server_shutdown || server->backup_noswitch)
3144 backup_router = NULL;
3146 /* If this was our primary router connection then we're lost to
3147 the outside world. */
3148 if (server->router == user_data) {
3149 /* Check whether we have a backup router connection */
3150 if (!backup_router || backup_router == user_data) {
3151 silc_schedule_task_add(server->schedule, 0,
3152 silc_server_connect_to_router,
3155 SILC_TASK_PRI_NORMAL);
3157 server->id_entry->router = NULL;
3158 server->router = NULL;
3159 server->standalone = TRUE;
3160 backup_router = NULL;
3162 if (server->id_entry != backup_router) {
3163 SILC_LOG_INFO(("New primary router is backup router %s",
3164 backup_router->server_name));
3165 server->id_entry->router = backup_router;
3166 server->router = backup_router;
3167 server->router_connect = time(0);
3168 server->backup_primary = TRUE;
3170 SILC_LOG_INFO(("We are now new primary router in this cell"));
3171 server->id_entry->router = NULL;
3172 server->router = NULL;
3173 server->standalone = TRUE;
3175 /* We stop here to take a breath */
3179 if (server->server_type == SILC_BACKUP_ROUTER) {
3180 server->server_type = SILC_ROUTER;
3182 /* We'll need to constantly try to reconnect to the primary
3183 router so that we'll see when it comes back online. */
3184 silc_server_backup_reconnect(server, sock->ip, sock->port,
3185 silc_server_backup_connected,
3189 /* Mark this connection as replaced */
3190 silc_server_backup_replaced_add(server, user_data->id,
3193 } else if (backup_router) {
3194 SILC_LOG_INFO(("Enabling the use of backup router %s",
3195 backup_router->server_name));
3196 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3197 backup_router->server_name));
3199 /* Mark this connection as replaced */
3200 silc_server_backup_replaced_add(server, user_data->id,
3202 } else if (server->server_type == SILC_SERVER &&
3203 sock->type == SILC_SOCKET_TYPE_ROUTER) {
3204 /* Reconnect to the router (backup) */
3205 silc_schedule_task_add(server->schedule, 0,
3206 silc_server_connect_to_router,
3209 SILC_TASK_PRI_NORMAL);
3212 if (!backup_router) {
3213 /* Remove all servers that are originated from this server, and
3214 remove the clients of those servers too. */
3215 silc_server_remove_servers_by_server(server, user_data, TRUE);
3217 /* Remove the clients that this server owns as they will become
3218 invalid now too. For backup router the server is actually
3219 coming from the primary router, so mark that as the owner
3221 if (server->server_type == SILC_BACKUP_ROUTER &&
3222 sock->type == SILC_SOCKET_TYPE_SERVER)
3223 silc_server_remove_clients_by_server(server, server->router,
3226 silc_server_remove_clients_by_server(server, user_data,
3229 /* Remove channels owned by this server */
3230 if (server->server_type == SILC_SERVER)
3231 silc_server_remove_channels_by_server(server, user_data);
3233 /* Enable local server connections that may be disabled */
3234 silc_server_local_servers_toggle_enabled(server, TRUE);
3236 /* Update the client entries of this server to the new backup
3237 router. If we are the backup router we also resolve the real
3238 servers for the clients. After updating is over this also
3239 removes the clients that this server explicitly owns. */
3240 silc_server_update_clients_by_server(server, user_data,
3241 backup_router, TRUE);
3243 /* If we are router and just lost our primary router (now standlaone)
3244 we remove everything that was behind it, since we don't know
3246 if (server->server_type == SILC_ROUTER && server->standalone)
3247 /* Remove all servers that are originated from this server, and
3248 remove the clients of those servers too. */
3249 silc_server_remove_servers_by_server(server, user_data, TRUE);
3251 /* Finally remove the clients that are explicitly owned by this
3252 server. They go down with the server. */
3253 silc_server_remove_clients_by_server(server, user_data,
3256 /* Update our server cache to use the new backup router too. */
3257 silc_server_update_servers_by_server(server, user_data, backup_router);
3258 if (server->server_type == SILC_SERVER)
3259 silc_server_update_channels_by_server(server, user_data,
3262 /* Send notify about primary router going down to local operators */
3263 if (server->backup_router)
3264 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3265 SILC_NOTIFY_TYPE_NONE,
3266 ("%s switched to backup router %s "
3267 "(we are primary router now)",
3268 server->server_name, server->server_name));
3269 else if (server->router)
3270 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3271 SILC_NOTIFY_TYPE_NONE,
3272 ("%s switched to backup router %s",
3273 server->server_name,
3274 server->router->server_name));
3276 server->backup_noswitch = FALSE;
3278 /* Free the server entry */
3279 silc_server_backup_del(server, user_data);
3280 silc_server_backup_replaced_del(server, user_data);
3281 silc_idlist_del_data(user_data);
3282 if (!silc_idlist_del_server(server->local_list, user_data))
3283 silc_idlist_del_server(server->global_list, user_data);
3284 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3285 server->stat.my_servers--;
3287 server->stat.my_routers--;
3288 server->stat.routers--;
3290 server->stat.servers--;
3291 if (server->server_type == SILC_ROUTER)
3292 server->stat.cell_servers--;
3294 if (backup_router && backup_router != server->id_entry) {
3295 /* Announce all of our stuff that was created about 5 minutes ago.
3296 The backup router knows all the other stuff already. */
3297 if (server->server_type == SILC_ROUTER)
3298 silc_server_announce_servers(server, FALSE, time(0) - 300,
3299 backup_router->connection);
3301 /* Announce our clients and channels to the router */
3302 silc_server_announce_clients(server, time(0) - 300,
3303 backup_router->connection);
3304 silc_server_announce_channels(server, time(0) - 300,
3305 backup_router->connection);
3311 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3313 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3315 silc_idlist_del_data(user_data);
3316 silc_free(user_data);
3321 /* If any protocol is active cancel its execution */
3322 if (sock->protocol) {
3323 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3324 silc_protocol_cancel(sock->protocol, server->schedule);
3325 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3326 silc_protocol_execute_final(sock->protocol, server->schedule);
3327 sock->protocol = NULL;
3330 sock->user_data = NULL;
3333 /* Removes client from all channels it has joined. This is used when client
3334 connection is disconnected. If the client on a channel is last, the
3335 channel is removed as well. This sends the SIGNOFF notify types. */
3337 void silc_server_remove_from_channels(SilcServer server,
3338 SilcSocketConnection sock,
3339 SilcClientEntry client,
3341 const char *signoff_message,
3344 SilcChannelEntry channel;
3345 SilcChannelClientEntry chl;
3346 SilcHashTableList htl;
3347 SilcBuffer clidp = NULL;
3352 SILC_LOG_DEBUG(("Removing client from joined channels"));
3354 if (notify && !client->id)
3358 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3363 /* Remove the client from all channels. The client is removed from
3364 the channels' user list. */
3365 silc_hash_table_list(client->channels, &htl);
3366 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3367 channel = chl->channel;
3369 /* Remove channel if this is last client leaving the channel, unless
3370 the channel is permanent. */
3371 if (server->server_type != SILC_SERVER &&
3372 silc_hash_table_count(channel->user_list) < 2) {
3373 silc_server_channel_delete(server, channel);
3377 silc_hash_table_del(client->channels, channel);
3378 silc_hash_table_del(channel->user_list, client);
3379 channel->user_count--;
3381 /* If there is no global users on the channel anymore mark the channel
3382 as local channel. Do not check if the removed client is local client. */
3383 if (server->server_type == SILC_SERVER && channel->global_users &&
3384 chl->client->router && !silc_server_channel_has_global(channel))
3385 channel->global_users = FALSE;
3387 memset(chl, 'A', sizeof(*chl));
3390 /* Update statistics */
3391 if (SILC_IS_LOCAL(client))
3392 server->stat.my_chanclients--;
3393 if (server->server_type == SILC_ROUTER) {
3394 server->stat.cell_chanclients--;
3395 server->stat.chanclients--;
3398 /* If there is not at least one local user on the channel then we don't
3399 need the channel entry anymore, we can remove it safely, unless the
3400 channel is permanent channel */
3401 if (server->server_type == SILC_SERVER &&
3402 !silc_server_channel_has_local(channel)) {
3403 /* Notify about leaving client if this channel has global users. */
3404 if (notify && channel->global_users)
3405 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3406 SILC_NOTIFY_TYPE_SIGNOFF,
3407 signoff_message ? 2 : 1,
3408 clidp->data, clidp->len,
3409 signoff_message, signoff_message ?
3410 strlen(signoff_message) : 0);
3412 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3413 silc_server_channel_delete(server, channel);
3417 /* Send notify to channel about client leaving SILC and channel too */
3419 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3420 SILC_NOTIFY_TYPE_SIGNOFF,
3421 signoff_message ? 2 : 1,
3422 clidp->data, clidp->len,
3423 signoff_message, signoff_message ?
3424 strlen(signoff_message) : 0);
3426 /* Don't create keys if we are shutting down */
3427 if (server->server_shutdown)
3430 /* Re-generate channel key if needed */
3431 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3432 if (!silc_server_create_channel_key(server, channel, 0))
3435 /* Send the channel key to the channel. The key of course is not sent
3436 to the client who was removed from the channel. */
3437 silc_server_send_channel_key(server, client->connection, channel,
3438 server->server_type == SILC_ROUTER ?
3439 FALSE : !server->standalone);
3443 silc_hash_table_list_reset(&htl);
3445 silc_buffer_free(clidp);
3448 /* Removes client from one channel. This is used for example when client
3449 calls LEAVE command to remove itself from the channel. Returns TRUE
3450 if channel still exists and FALSE if the channel is removed when
3451 last client leaves the channel. If `notify' is FALSE notify messages
3454 bool silc_server_remove_from_one_channel(SilcServer server,
3455 SilcSocketConnection sock,
3456 SilcChannelEntry channel,
3457 SilcClientEntry client,
3460 SilcChannelClientEntry chl;
3463 SILC_LOG_DEBUG(("Removing %s from channel %s",
3464 silc_id_render(client->id, SILC_ID_CLIENT),
3465 channel->channel_name));
3467 /* Get the entry to the channel, if this client is not on the channel
3469 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3472 /* Remove channel if this is last client leaving the channel, unless
3473 the channel is permanent. */
3474 if (server->server_type != SILC_SERVER &&
3475 silc_hash_table_count(channel->user_list) < 2) {
3476 silc_server_channel_delete(server, channel);
3480 silc_hash_table_del(client->channels, channel);
3481 silc_hash_table_del(channel->user_list, client);
3482 channel->user_count--;
3484 /* If there is no global users on the channel anymore mark the channel
3485 as local channel. Do not check if the client is local client. */
3486 if (server->server_type == SILC_SERVER && channel->global_users &&
3487 chl->client->router && !silc_server_channel_has_global(channel))
3488 channel->global_users = FALSE;
3490 memset(chl, 'O', sizeof(*chl));
3493 /* Update statistics */
3494 if (SILC_IS_LOCAL(client))
3495 server->stat.my_chanclients--;
3496 if (server->server_type == SILC_ROUTER) {
3497 server->stat.cell_chanclients--;
3498 server->stat.chanclients--;
3501 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3505 /* If there is not at least one local user on the channel then we don't
3506 need the channel entry anymore, we can remove it safely, unless the
3507 channel is permanent channel */
3508 if (server->server_type == SILC_SERVER &&
3509 !silc_server_channel_has_local(channel)) {
3510 /* Notify about leaving client if this channel has global users. */
3511 if (notify && channel->global_users)
3512 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3513 SILC_NOTIFY_TYPE_LEAVE, 1,
3514 clidp->data, clidp->len);
3516 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3517 silc_server_channel_delete(server, channel);
3518 silc_buffer_free(clidp);
3522 /* Send notify to channel about client leaving the channel */
3524 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3525 SILC_NOTIFY_TYPE_LEAVE, 1,
3526 clidp->data, clidp->len);
3528 silc_buffer_free(clidp);
3532 /* Timeout callback. This is called if connection is idle or for some
3533 other reason is not responding within some period of time. This
3534 disconnects the remote end. */
3536 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3538 SilcServer server = (SilcServer)context;
3539 SilcSocketConnection sock = server->sockets[fd];
3540 SilcProtocolType protocol = 0;
3542 SILC_LOG_DEBUG(("Start"));
3547 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3548 sock->hostname, sock->ip));
3550 /* If we have protocol active we must assure that we call the protocol's
3551 final callback so that all the memory is freed. */
3552 if (sock->protocol) {
3553 protocol = sock->protocol->protocol->type;
3554 silc_protocol_cancel(sock->protocol, server->schedule);
3555 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3556 silc_protocol_execute_final(sock->protocol, server->schedule);
3557 sock->protocol = NULL;
3561 silc_server_disconnect_remote(server, sock,
3563 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3564 SILC_STATUS_ERR_AUTH_FAILED :
3565 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3566 "Connection timeout");
3568 if (sock->user_data)
3569 silc_server_free_sock_user_data(server, sock, NULL);
3572 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3573 function may be used only by router. In real SILC network all channels
3574 are created by routers thus this function is never used by normal
3577 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3578 SilcServerID *router_id,
3584 SilcChannelID *channel_id;
3585 SilcChannelEntry entry;
3589 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3592 cipher = SILC_DEFAULT_CIPHER;
3594 hmac = SILC_DEFAULT_HMAC;
3596 /* Allocate cipher */
3597 if (!silc_cipher_alloc(cipher, &key))
3601 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3602 silc_cipher_free(key);
3606 channel_name = strdup(channel_name);
3608 /* Create the channel ID */
3609 if (!silc_id_create_channel_id(server, router_id, server->rng,
3611 silc_free(channel_name);
3612 silc_cipher_free(key);
3613 silc_hmac_free(newhmac);
3617 /* Create the channel */
3618 entry = silc_idlist_add_channel(server->local_list, channel_name,
3619 SILC_CHANNEL_MODE_NONE, channel_id,
3620 NULL, key, newhmac, 0);
3622 silc_free(channel_name);
3623 silc_cipher_free(key);
3624 silc_hmac_free(newhmac);
3625 silc_free(channel_id);
3629 entry->cipher = strdup(cipher);
3630 entry->hmac_name = strdup(hmac);
3632 /* Now create the actual key material */
3633 if (!silc_server_create_channel_key(server, entry,
3634 silc_cipher_get_key_len(key) / 8)) {
3635 silc_idlist_del_channel(server->local_list, entry);
3639 /* Notify other routers about the new channel. We send the packet
3640 to our primary route. */
3642 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3643 channel_name, entry->id,
3644 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3647 /* Distribute to backup routers */
3648 if (broadcast && server->server_type == SILC_ROUTER) {
3651 SilcUInt32 name_len = strlen(channel_name);
3652 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3653 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3655 packet = silc_channel_payload_encode(channel_name, name_len,
3656 cid, channel_id_len, entry->mode);
3657 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3658 packet->data, packet->len, FALSE, TRUE);
3660 silc_buffer_free(packet);
3663 server->stat.my_channels++;
3664 if (server->server_type == SILC_ROUTER) {
3665 server->stat.channels++;
3666 server->stat.cell_channels++;
3667 entry->users_resolved = TRUE;
3673 /* Same as above but creates the channel with Channel ID `channel_id. */
3676 silc_server_create_new_channel_with_id(SilcServer server,
3680 SilcChannelID *channel_id,
3683 SilcChannelEntry entry;
3687 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3690 cipher = SILC_DEFAULT_CIPHER;
3692 hmac = SILC_DEFAULT_HMAC;
3694 /* Allocate cipher */
3695 if (!silc_cipher_alloc(cipher, &key))
3699 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3700 silc_cipher_free(key);
3704 channel_name = strdup(channel_name);
3706 /* Create the channel */
3707 entry = silc_idlist_add_channel(server->local_list, channel_name,
3708 SILC_CHANNEL_MODE_NONE, channel_id,
3709 NULL, key, newhmac, 0);
3711 silc_cipher_free(key);
3712 silc_hmac_free(newhmac);
3713 silc_free(channel_name);
3717 /* Now create the actual key material */
3718 if (!silc_server_create_channel_key(server, entry,
3719 silc_cipher_get_key_len(key) / 8)) {
3720 silc_idlist_del_channel(server->local_list, entry);
3724 /* Notify other routers about the new channel. We send the packet
3725 to our primary route. */
3727 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3728 channel_name, entry->id,
3729 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3732 /* Distribute to backup routers */
3733 if (broadcast && server->server_type == SILC_ROUTER) {
3736 SilcUInt32 name_len = strlen(channel_name);
3737 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3738 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3740 packet = silc_channel_payload_encode(channel_name, name_len,
3741 cid, channel_id_len, entry->mode);
3742 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3743 packet->data, packet->len, FALSE, TRUE);
3745 silc_buffer_free(packet);
3748 server->stat.my_channels++;
3749 if (server->server_type == SILC_ROUTER) {
3750 server->stat.channels++;
3751 server->stat.cell_channels++;
3752 entry->users_resolved = TRUE;
3758 /* Channel's key re-key timeout callback. */
3760 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3762 SilcServer server = app_context;
3763 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3767 /* Return now if we are shutting down */
3768 if (server->server_shutdown)
3771 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3774 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3777 /* Generates new channel key. This is used to create the initial channel key
3778 but also to re-generate new key for channel. If `key_len' is provided
3779 it is the bytes of the key length. */
3781 bool silc_server_create_channel_key(SilcServer server,
3782 SilcChannelEntry channel,
3786 unsigned char channel_key[32], hash[32];
3789 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3790 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3794 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3796 if (!channel->channel_key)
3797 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3798 channel->channel_key = NULL;
3804 else if (channel->key_len)
3805 len = channel->key_len / 8;
3807 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3809 /* Create channel key */
3810 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3813 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3815 /* Remove old key if exists */
3817 memset(channel->key, 0, channel->key_len / 8);
3818 silc_free(channel->key);
3822 channel->key_len = len * 8;
3823 channel->key = silc_memdup(channel_key, len);
3824 memset(channel_key, 0, sizeof(channel_key));
3826 /* Generate HMAC key from the channel key data and set it */
3828 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3829 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3830 silc_hmac_set_key(channel->hmac, hash,
3831 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3832 memset(hash, 0, sizeof(hash));
3834 if (server->server_type == SILC_ROUTER) {
3835 if (!channel->rekey)
3836 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3837 channel->rekey->channel = channel;
3838 channel->rekey->key_len = key_len;
3839 if (channel->rekey->task)
3840 silc_schedule_task_del(server->schedule, channel->rekey->task);
3842 channel->rekey->task =
3843 silc_schedule_task_add(server->schedule, 0,
3844 silc_server_channel_key_rekey,
3845 (void *)channel->rekey,
3846 server->config->channel_rekey_secs, 0,
3848 SILC_TASK_PRI_NORMAL);
3854 /* Saves the channel key found in the encoded `key_payload' buffer. This
3855 function is used when we receive Channel Key Payload and also when we're
3856 processing JOIN command reply. Returns entry to the channel. */
3858 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3859 SilcBuffer key_payload,
3860 SilcChannelEntry channel)
3862 SilcChannelKeyPayload payload = NULL;
3863 SilcChannelID *id = NULL;
3864 unsigned char *tmp, hash[32];
3868 /* Decode channel key payload */
3869 payload = silc_channel_key_payload_parse(key_payload->data,
3872 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3877 /* Get the channel entry */
3880 /* Get channel ID */
3881 tmp = silc_channel_key_get_id(payload, &tmp_len);
3882 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3888 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3890 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3892 if (server->server_type == SILC_ROUTER)
3893 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3894 silc_id_render(id, SILC_ID_CHANNEL)));
3900 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3902 tmp = silc_channel_key_get_key(payload, &tmp_len);
3908 cipher = silc_channel_key_get_cipher(payload, NULL);
3914 /* Remove old key if exists */
3916 memset(channel->key, 0, channel->key_len / 8);
3917 silc_free(channel->key);
3918 silc_cipher_free(channel->channel_key);
3921 /* Create new cipher */
3922 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3923 channel->channel_key = NULL;
3928 if (channel->cipher)
3929 silc_free(channel->cipher);
3930 channel->cipher = strdup(cipher);
3933 channel->key_len = tmp_len * 8;
3934 channel->key = silc_memdup(tmp, tmp_len);
3935 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3937 /* Generate HMAC key from the channel key data and set it */
3939 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3940 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3941 silc_hmac_set_key(channel->hmac, hash,
3942 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3944 memset(hash, 0, sizeof(hash));
3945 memset(tmp, 0, tmp_len);
3947 if (server->server_type == SILC_ROUTER) {
3948 if (!channel->rekey)
3949 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3950 channel->rekey->channel = channel;
3951 if (channel->rekey->task)
3952 silc_schedule_task_del(server->schedule, channel->rekey->task);
3954 channel->rekey->task =
3955 silc_schedule_task_add(server->schedule, 0,
3956 silc_server_channel_key_rekey,
3957 (void *)channel->rekey,
3958 server->config->channel_rekey_secs, 0,
3960 SILC_TASK_PRI_NORMAL);
3966 silc_channel_key_payload_free(payload);
3971 /* Heartbeat callback. This function is set as argument for the
3972 silc_socket_set_heartbeat function. The library will call this function
3973 at the set time interval. */
3975 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3978 SilcServer server = hb_context;
3980 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3981 sock->port, sock->ip));
3983 /* Send the heartbeat */
3984 silc_server_send_heartbeat(server, sock);
3987 /* Returns assembled of all servers in the given ID list. The packet's
3988 form is dictated by the New ID payload. */
3990 static void silc_server_announce_get_servers(SilcServer server,
3991 SilcServerEntry remote,
3993 SilcBuffer *servers,
3994 unsigned long creation_time)
3996 SilcIDCacheList list;
3997 SilcIDCacheEntry id_cache;
3998 SilcServerEntry entry;
4001 /* Go through all clients in the list */
4002 if (silc_idcache_get_all(id_list->servers, &list)) {
4003 if (silc_idcache_list_first(list, &id_cache)) {
4005 entry = (SilcServerEntry)id_cache->context;
4007 /* Do not announce the one we've sending our announcements and
4008 do not announce ourself. Also check the creation time if it's
4010 if ((entry == remote) || (entry == server->id_entry) ||
4011 (creation_time && entry->data.created < creation_time)) {
4012 if (!silc_idcache_list_next(list, &id_cache))
4017 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4019 *servers = silc_buffer_realloc(*servers,
4021 (*servers)->truelen + idp->len :
4023 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4024 silc_buffer_put(*servers, idp->data, idp->len);
4025 silc_buffer_pull(*servers, idp->len);
4026 silc_buffer_free(idp);
4028 if (!silc_idcache_list_next(list, &id_cache))
4033 silc_idcache_list_free(list);
4038 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4044 p = silc_notify_payload_encode(notify, argc, ap);
4050 /* This function is used by router to announce existing servers to our
4051 primary router when we've connected to it. If `creation_time' is non-zero
4052 then only the servers that has been created after the `creation_time'
4053 will be announced. */
4055 void silc_server_announce_servers(SilcServer server, bool global,
4056 unsigned long creation_time,
4057 SilcSocketConnection remote)
4059 SilcBuffer servers = NULL;
4061 SILC_LOG_DEBUG(("Announcing servers"));
4063 /* Get servers in local list */
4064 silc_server_announce_get_servers(server, remote->user_data,
4065 server->local_list, &servers,
4069 /* Get servers in global list */
4070 silc_server_announce_get_servers(server, remote->user_data,
4071 server->global_list, &servers,
4075 silc_buffer_push(servers, servers->data - servers->head);
4076 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
4078 /* Send the packet */
4079 silc_server_packet_send(server, remote,
4080 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4081 servers->data, servers->len, TRUE);
4083 silc_buffer_free(servers);
4087 /* Returns assembled packet of all clients in the given ID list. The
4088 packet's form is dictated by the New ID Payload. */
4090 static void silc_server_announce_get_clients(SilcServer server,
4092 SilcBuffer *clients,
4094 unsigned long creation_time)
4096 SilcIDCacheList list;
4097 SilcIDCacheEntry id_cache;
4098 SilcClientEntry client;
4101 unsigned char mode[4];
4103 /* Go through all clients in the list */
4104 if (silc_idcache_get_all(id_list->clients, &list)) {
4105 if (silc_idcache_list_first(list, &id_cache)) {
4107 client = (SilcClientEntry)id_cache->context;
4109 if (creation_time && client->data.created < creation_time) {
4110 if (!silc_idcache_list_next(list, &id_cache))
4114 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
4115 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
4116 if (!silc_idcache_list_next(list, &id_cache))
4121 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4123 *clients = silc_buffer_realloc(*clients,
4125 (*clients)->truelen + idp->len :
4127 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4128 silc_buffer_put(*clients, idp->data, idp->len);
4129 silc_buffer_pull(*clients, idp->len);
4131 SILC_PUT32_MSB(client->mode, mode);
4133 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4134 2, idp->data, idp->len,
4136 *umodes = silc_buffer_realloc(*umodes,
4138 (*umodes)->truelen + tmp->len :
4140 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4141 silc_buffer_put(*umodes, tmp->data, tmp->len);
4142 silc_buffer_pull(*umodes, tmp->len);
4143 silc_buffer_free(tmp);
4145 silc_buffer_free(idp);
4147 if (!silc_idcache_list_next(list, &id_cache))
4152 silc_idcache_list_free(list);
4156 /* This function is used to announce our existing clients to our router
4157 when we've connected to it. If `creation_time' is non-zero then only
4158 the clients that has been created after the `creation_time' will be
4161 void silc_server_announce_clients(SilcServer server,
4162 unsigned long creation_time,
4163 SilcSocketConnection remote)
4165 SilcBuffer clients = NULL;
4166 SilcBuffer umodes = NULL;
4168 SILC_LOG_DEBUG(("Announcing clients"));
4170 /* Get clients in local list */
4171 silc_server_announce_get_clients(server, server->local_list,
4172 &clients, &umodes, creation_time);
4174 /* As router we announce our global list as well */
4175 if (server->server_type == SILC_ROUTER)
4176 silc_server_announce_get_clients(server, server->global_list,
4177 &clients, &umodes, creation_time);
4180 silc_buffer_push(clients, clients->data - clients->head);
4181 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4183 /* Send the packet */
4184 silc_server_packet_send(server, remote,
4185 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4186 clients->data, clients->len, TRUE);
4188 silc_buffer_free(clients);
4192 silc_buffer_push(umodes, umodes->data - umodes->head);
4193 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4195 /* Send the packet */
4196 silc_server_packet_send(server, remote,
4197 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4198 umodes->data, umodes->len, TRUE);
4200 silc_buffer_free(umodes);
4204 /* Returns channel's topic for announcing it */
4206 void silc_server_announce_get_channel_topic(SilcServer server,
4207 SilcChannelEntry channel,
4212 if (channel->topic) {
4213 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4214 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4215 chidp->data, chidp->len,
4217 strlen(channel->topic));
4218 silc_buffer_free(chidp);
4222 /* Returns assembled packets for channel users of the `channel'. */
4224 void silc_server_announce_get_channel_users(SilcServer server,
4225 SilcChannelEntry channel,
4226 SilcBuffer *channel_modes,
4227 SilcBuffer *channel_users,
4228 SilcBuffer *channel_users_modes)
4230 SilcChannelClientEntry chl;
4231 SilcHashTableList htl;
4232 SilcBuffer chidp, clidp, csidp;
4233 SilcBuffer tmp, fkey = NULL;
4235 unsigned char mode[4];
4238 SILC_LOG_DEBUG(("Start"));
4240 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4241 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4244 SILC_PUT32_MSB(channel->mode, mode);
4245 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4246 if (channel->founder_key)
4247 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4249 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4250 6, csidp->data, csidp->len,
4253 hmac, hmac ? strlen(hmac) : 0,
4254 channel->passphrase,
4255 channel->passphrase ?
4256 strlen(channel->passphrase) : 0,
4257 fkey ? fkey->data : NULL,
4258 fkey ? fkey->len : 0);
4261 silc_buffer_realloc(*channel_modes,
4263 (*channel_modes)->truelen + len : len));
4264 silc_buffer_pull_tail(*channel_modes,
4265 ((*channel_modes)->end -
4266 (*channel_modes)->data));
4267 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4268 silc_buffer_pull(*channel_modes, len);
4269 silc_buffer_free(tmp);
4270 silc_buffer_free(fkey);
4273 /* Now find all users on the channel */
4274 silc_hash_table_list(channel->user_list, &htl);
4275 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4276 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4279 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4280 clidp->data, clidp->len,
4281 chidp->data, chidp->len);
4284 silc_buffer_realloc(*channel_users,
4286 (*channel_users)->truelen + len : len));
4287 silc_buffer_pull_tail(*channel_users,
4288 ((*channel_users)->end -
4289 (*channel_users)->data));
4291 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4292 silc_buffer_pull(*channel_users, len);
4293 silc_buffer_free(tmp);
4295 /* CUMODE notify for mode change on the channel */
4296 SILC_PUT32_MSB(chl->mode, mode);
4297 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4298 fkey = silc_pkcs_public_key_payload_encode(channel->founder_key);
4299 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4300 4, csidp->data, csidp->len,
4302 clidp->data, clidp->len,
4303 fkey ? fkey->data : NULL,
4304 fkey ? fkey->len : 0);
4306 *channel_users_modes =
4307 silc_buffer_realloc(*channel_users_modes,
4308 (*channel_users_modes ?
4309 (*channel_users_modes)->truelen + len : len));
4310 silc_buffer_pull_tail(*channel_users_modes,
4311 ((*channel_users_modes)->end -
4312 (*channel_users_modes)->data));
4314 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4315 silc_buffer_pull(*channel_users_modes, len);
4316 silc_buffer_free(tmp);
4317 silc_buffer_free(fkey);
4319 silc_buffer_free(clidp);
4321 silc_hash_table_list_reset(&htl);
4322 silc_buffer_free(chidp);
4323 silc_buffer_free(csidp);
4326 /* Returns assembled packets for all channels and users on those channels
4327 from the given ID List. The packets are in the form dictated by the
4328 New Channel and New Channel User payloads. */
4330 void silc_server_announce_get_channels(SilcServer server,
4332 SilcBuffer *channels,
4333 SilcBuffer **channel_modes,
4334 SilcBuffer *channel_users,
4335 SilcBuffer **channel_users_modes,
4336 SilcUInt32 *channel_users_modes_c,
4337 SilcBuffer **channel_topics,
4338 SilcChannelID ***channel_ids,
4339 unsigned long creation_time)
4341 SilcIDCacheList list;
4342 SilcIDCacheEntry id_cache;
4343 SilcChannelEntry channel;
4346 SilcUInt16 name_len;
4348 int i = *channel_users_modes_c;
4351 SILC_LOG_DEBUG(("Start"));
4353 /* Go through all channels in the list */
4354 if (silc_idcache_get_all(id_list->channels, &list)) {
4355 if (silc_idcache_list_first(list, &id_cache)) {
4357 channel = (SilcChannelEntry)id_cache->context;
4359 if (creation_time && channel->created < creation_time)
4364 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4365 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4366 name_len = strlen(channel->channel_name);
4369 len = 4 + name_len + id_len + 4;
4371 silc_buffer_realloc(*channels,
4372 (*channels ? (*channels)->truelen +
4374 silc_buffer_pull_tail(*channels,
4375 ((*channels)->end - (*channels)->data));
4376 silc_buffer_format(*channels,
4377 SILC_STR_UI_SHORT(name_len),
4378 SILC_STR_UI_XNSTRING(channel->channel_name,
4380 SILC_STR_UI_SHORT(id_len),
4381 SILC_STR_UI_XNSTRING(cid, id_len),
4382 SILC_STR_UI_INT(channel->mode),
4384 silc_buffer_pull(*channels, len);
4387 if (creation_time && channel->updated < creation_time)
4393 /* Channel user modes */
4394 *channel_users_modes = silc_realloc(*channel_users_modes,
4395 sizeof(**channel_users_modes) *
4397 (*channel_users_modes)[i] = NULL;
4398 *channel_modes = silc_realloc(*channel_modes,
4399 sizeof(**channel_modes) * (i + 1));
4400 (*channel_modes)[i] = NULL;
4401 *channel_ids = silc_realloc(*channel_ids,
4402 sizeof(**channel_ids) * (i + 1));
4403 (*channel_ids)[i] = NULL;
4404 silc_server_announce_get_channel_users(server, channel,
4405 &(*channel_modes)[i],
4407 &(*channel_users_modes)[i]);
4408 (*channel_ids)[i] = channel->id;
4410 /* Channel's topic */
4411 *channel_topics = silc_realloc(*channel_topics,
4412 sizeof(**channel_topics) * (i + 1));
4413 (*channel_topics)[i] = NULL;
4414 silc_server_announce_get_channel_topic(server, channel,
4415 &(*channel_topics)[i]);
4416 (*channel_users_modes_c)++;
4423 if (!silc_idcache_list_next(list, &id_cache))
4428 silc_idcache_list_free(list);
4432 /* This function is used to announce our existing channels to our router
4433 when we've connected to it. This also announces the users on the
4434 channels to the router. If the `creation_time' is non-zero only the
4435 channels that was created after the `creation_time' are announced.
4436 Note that the channel users are still announced even if the `creation_time'
4439 void silc_server_announce_channels(SilcServer server,
4440 unsigned long creation_time,
4441 SilcSocketConnection remote)
4443 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4444 SilcBuffer *channel_users_modes = NULL;
4445 SilcBuffer *channel_topics = NULL;
4446 SilcUInt32 channel_users_modes_c = 0;
4447 SilcChannelID **channel_ids = NULL;
4449 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4451 /* Get channels and channel users in local list */
4452 silc_server_announce_get_channels(server, server->local_list,
4453 &channels, &channel_modes,
4455 &channel_users_modes,
4456 &channel_users_modes_c,
4458 &channel_ids, creation_time);
4460 /* Get channels and channel users in global list */
4461 if (server->server_type != SILC_SERVER)
4462 silc_server_announce_get_channels(server, server->global_list,
4463 &channels, &channel_modes,
4465 &channel_users_modes,
4466 &channel_users_modes_c,
4468 &channel_ids, creation_time);
4471 silc_buffer_push(channels, channels->data - channels->head);
4472 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4474 /* Send the packet */
4475 silc_server_packet_send(server, remote,
4476 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4477 channels->data, channels->len,
4480 silc_buffer_free(channels);
4483 if (channel_users) {
4484 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4485 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4486 channel_users->len);
4488 /* Send the packet */
4489 silc_server_packet_send(server, remote,
4490 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4491 channel_users->data, channel_users->len,
4494 silc_buffer_free(channel_users);
4497 if (channel_modes) {
4500 for (i = 0; i < channel_users_modes_c; i++) {
4501 if (!channel_modes[i])
4503 silc_buffer_push(channel_modes[i],
4504 channel_modes[i]->data -
4505 channel_modes[i]->head);
4506 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4507 channel_modes[i]->len);
4508 silc_server_packet_send_dest(server, remote,
4509 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4510 channel_ids[i], SILC_ID_CHANNEL,
4511 channel_modes[i]->data,
4512 channel_modes[i]->len,
4514 silc_buffer_free(channel_modes[i]);
4516 silc_free(channel_modes);
4519 if (channel_users_modes) {
4522 for (i = 0; i < channel_users_modes_c; i++) {
4523 if (!channel_users_modes[i])
4525 silc_buffer_push(channel_users_modes[i],
4526 channel_users_modes[i]->data -
4527 channel_users_modes[i]->head);
4528 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4529 channel_users_modes[i]->len);
4530 silc_server_packet_send_dest(server, remote,
4531 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4532 channel_ids[i], SILC_ID_CHANNEL,
4533 channel_users_modes[i]->data,
4534 channel_users_modes[i]->len,
4536 silc_buffer_free(channel_users_modes[i]);
4538 silc_free(channel_users_modes);
4541 if (channel_topics) {
4544 for (i = 0; i < channel_users_modes_c; i++) {
4545 if (!channel_topics[i])
4548 silc_buffer_push(channel_topics[i],
4549 channel_topics[i]->data -
4550 channel_topics[i]->head);
4551 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4552 channel_topics[i]->len);
4553 silc_server_packet_send_dest(server, remote,
4554 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4555 channel_ids[i], SILC_ID_CHANNEL,
4556 channel_topics[i]->data,
4557 channel_topics[i]->len,
4559 silc_buffer_free(channel_topics[i]);
4561 silc_free(channel_topics);
4564 silc_free(channel_ids);
4567 /* Failure timeout callback. If this is called then we will immediately
4568 process the received failure. We always process the failure with timeout
4569 since we do not want to blindly trust to received failure packets.
4570 This won't be called (the timeout is cancelled) if the failure was
4571 bogus (it is bogus if remote does not close the connection after sending
4574 SILC_TASK_CALLBACK(silc_server_failure_callback)
4576 SilcServer server = app_context;
4577 SilcServerFailureContext f = (SilcServerFailureContext)context;
4579 if (f->sock->protocol) {
4580 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4581 silc_protocol_execute(f->sock->protocol, server->schedule, 0, 0);
4584 silc_socket_free(f->sock);
4588 /* Assembles user list and users mode list from the `channel'. */
4590 bool silc_server_get_users_on_channel(SilcServer server,
4591 SilcChannelEntry channel,
4592 SilcBuffer *user_list,
4593 SilcBuffer *mode_list,
4594 SilcUInt32 *user_count)
4596 SilcChannelClientEntry chl;
4597 SilcHashTableList htl;
4598 SilcBuffer client_id_list;
4599 SilcBuffer client_mode_list;
4601 SilcUInt32 list_count = 0, len = 0;
4603 if (!silc_hash_table_count(channel->user_list))
4606 silc_hash_table_list(channel->user_list, &htl);
4607 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4608 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4609 silc_hash_table_list_reset(&htl);
4611 client_id_list = silc_buffer_alloc(len);
4613 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4614 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4615 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4617 silc_hash_table_list(channel->user_list, &htl);
4618 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4620 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4621 silc_buffer_put(client_id_list, idp->data, idp->len);
4622 silc_buffer_pull(client_id_list, idp->len);
4623 silc_buffer_free(idp);
4625 /* Client's mode on channel */
4626 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4627 silc_buffer_pull(client_mode_list, 4);
4631 silc_hash_table_list_reset(&htl);
4632 silc_buffer_push(client_id_list,
4633 client_id_list->data - client_id_list->head);
4634 silc_buffer_push(client_mode_list,
4635 client_mode_list->data - client_mode_list->head);
4637 *user_list = client_id_list;
4638 *mode_list = client_mode_list;
4639 *user_count = list_count;
4643 /* Saves users and their modes to the `channel'. */
4645 void silc_server_save_users_on_channel(SilcServer server,
4646 SilcSocketConnection sock,
4647 SilcChannelEntry channel,
4648 SilcClientID *noadd,
4649 SilcBuffer user_list,
4650 SilcBuffer mode_list,
4651 SilcUInt32 user_count)
4656 SilcClientID *client_id;
4657 SilcClientEntry client;
4658 SilcIDCacheEntry cache;
4659 SilcChannelClientEntry chl;
4661 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4662 channel->channel_name));
4664 for (i = 0; i < user_count; i++) {
4666 SILC_GET16_MSB(idp_len, user_list->data + 2);
4668 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4669 silc_buffer_pull(user_list, idp_len);
4674 SILC_GET32_MSB(mode, mode_list->data);
4675 silc_buffer_pull(mode_list, 4);
4677 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4678 silc_free(client_id);
4684 /* Check if we have this client cached already. */
4685 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4686 server->server_type, &cache);
4688 client = silc_idlist_find_client_by_id(server->global_list,
4689 client_id, server->server_type,
4692 /* If router did not find such Client ID in its lists then this must
4693 be bogus client or some router in the net is buggy. */
4694 if (server->server_type != SILC_SERVER) {
4695 silc_free(client_id);
4699 /* We don't have that client anywhere, add it. The client is added
4700 to global list since server didn't have it in the lists so it must be
4702 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4703 silc_id_dup(client_id, SILC_ID_CLIENT),
4704 sock->user_data, NULL, 0);
4706 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4707 silc_free(client_id);
4711 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4716 silc_free(client_id);
4718 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4719 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4720 "%s", channel->channel_name));
4724 if (!silc_server_client_on_channel(client, channel, &chl)) {
4725 /* Client was not on the channel, add it. */
4726 chl = silc_calloc(1, sizeof(*chl));
4727 chl->client = client;
4729 chl->channel = channel;
4730 silc_hash_table_add(channel->user_list, chl->client, chl);
4731 silc_hash_table_add(client->channels, chl->channel, chl);
4732 channel->user_count++;
4740 /* Saves channels and channels user modes to the `client'. Removes
4741 the client from those channels that are not sent in the list but
4744 void silc_server_save_user_channels(SilcServer server,
4745 SilcSocketConnection sock,
4746 SilcClientEntry client,
4747 SilcBuffer channels,
4748 SilcBuffer channels_user_modes)
4751 SilcUInt32 *chumodes;
4752 SilcChannelPayload entry;
4753 SilcChannelEntry channel;
4754 SilcChannelID *channel_id;
4755 SilcChannelClientEntry chl;
4756 SilcHashTable ht = NULL;
4757 SilcHashTableList htl;
4761 if (!channels || !channels_user_modes ||
4762 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4765 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4766 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4768 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4769 NULL, NULL, NULL, TRUE);
4770 silc_dlist_start(ch);
4771 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4772 /* Check if we have this channel, and add it if we don't have it.
4773 Also add the client on the channel unless it is there already. */
4774 channel_id = silc_channel_get_id_parse(entry);
4775 channel = silc_idlist_find_channel_by_id(server->local_list,
4778 channel = silc_idlist_find_channel_by_id(server->global_list,
4781 if (server->server_type != SILC_SERVER) {
4782 silc_free(channel_id);
4787 /* We don't have that channel anywhere, add it. */
4788 name = silc_channel_get_name(entry, NULL);
4789 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4790 channel_id, server->router,
4793 silc_free(channel_id);
4800 channel->mode = silc_channel_get_mode(entry);
4802 /* Add the client on the channel */
4803 if (!silc_server_client_on_channel(client, channel, &chl)) {
4804 chl = silc_calloc(1, sizeof(*chl));
4805 chl->client = client;
4806 chl->mode = chumodes[i++];
4807 chl->channel = channel;
4808 silc_hash_table_add(channel->user_list, chl->client, chl);
4809 silc_hash_table_add(client->channels, chl->channel, chl);
4810 channel->user_count++;
4813 chl->mode = chumodes[i++];
4816 silc_hash_table_add(ht, channel, channel);
4817 silc_free(channel_id);
4819 silc_channel_payload_list_free(ch);
4820 silc_free(chumodes);
4824 /* Go through the list again and remove client from channels that
4825 are no part of the list. */
4827 silc_hash_table_list(client->channels, &htl);
4828 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4829 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4830 silc_hash_table_del(chl->channel->user_list, chl->client);
4831 silc_hash_table_del(chl->client->channels, chl->channel);
4835 silc_hash_table_list_reset(&htl);
4836 silc_hash_table_free(ht);
4838 silc_hash_table_list(client->channels, &htl);
4839 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4840 silc_hash_table_del(chl->channel->user_list, chl->client);
4841 silc_hash_table_del(chl->client->channels, chl->channel);
4844 silc_hash_table_list_reset(&htl);
4848 /* Lookups route to the client indicated by the `id_data'. The connection
4849 object and internal data object is returned. Returns NULL if route
4850 could not be found to the client. If the `client_id' is specified then
4851 it is used and the `id_data' is ignored. */
4853 SilcSocketConnection
4854 silc_server_get_client_route(SilcServer server,
4855 unsigned char *id_data,
4857 SilcClientID *client_id,
4858 SilcIDListData *idata,
4859 SilcClientEntry *client_entry)
4862 SilcClientEntry client;
4864 SILC_LOG_DEBUG(("Start"));
4867 *client_entry = NULL;
4869 /* Decode destination Client ID */
4871 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4873 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4877 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4880 /* If the destination belongs to our server we don't have to route
4881 the packet anywhere but to send it to the local destination. */
4882 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4886 /* If we are router and the client has router then the client is in
4887 our cell but not directly connected to us. */
4888 if (server->server_type == SILC_ROUTER && client->router) {
4889 /* We are of course in this case the client's router thus the route
4890 to the client is the server who owns the client. So, we will send
4891 the packet to that server. */
4893 *idata = (SilcIDListData)client->router;
4894 return client->router->connection;
4897 /* Seems that client really is directly connected to us */
4899 *idata = (SilcIDListData)client;
4901 *client_entry = client;
4902 return client->connection;
4905 /* Destination belongs to someone not in this server. If we are normal
4906 server our action is to send the packet to our router. */
4907 if (server->server_type != SILC_ROUTER && !server->standalone) {
4910 *idata = (SilcIDListData)server->router;
4911 return SILC_PRIMARY_ROUTE(server);
4914 /* We are router and we will perform route lookup for the destination
4915 and send the packet to fastest route. */
4916 if (server->server_type == SILC_ROUTER && !server->standalone) {
4917 /* Check first that the ID is valid */
4918 client = silc_idlist_find_client_by_id(server->global_list, id,
4921 SilcSocketConnection dst_sock;
4923 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4927 *idata = (SilcIDListData)dst_sock->user_data;
4936 /* Encodes and returns channel list of channels the `client' has joined.
4937 Secret channels are not put to the list. */
4939 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4940 SilcClientEntry client,
4943 SilcBuffer *user_mode_list)
4945 SilcBuffer buffer = NULL;
4946 SilcChannelEntry channel;
4947 SilcChannelClientEntry chl;
4948 SilcHashTableList htl;
4951 SilcUInt16 name_len;
4955 *user_mode_list = NULL;
4957 silc_hash_table_list(client->channels, &htl);
4958 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4959 channel = chl->channel;
4961 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4963 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4966 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4967 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4968 name_len = strlen(channel->channel_name);
4970 len = 4 + name_len + id_len + 4;
4971 buffer = silc_buffer_realloc(buffer,
4972 (buffer ? buffer->truelen + len : len));
4973 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4974 silc_buffer_format(buffer,
4975 SILC_STR_UI_SHORT(name_len),
4976 SILC_STR_UI_XNSTRING(channel->channel_name,
4978 SILC_STR_UI_SHORT(id_len),
4979 SILC_STR_UI_XNSTRING(cid, id_len),
4980 SILC_STR_UI_INT(chl->channel->mode),
4982 silc_buffer_pull(buffer, len);
4985 if (user_mode_list) {
4986 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4988 (*user_mode_list)->truelen + 4 :
4990 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4991 (*user_mode_list)->data));
4992 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4993 silc_buffer_pull(*user_mode_list, 4);
4996 silc_hash_table_list_reset(&htl);
4999 silc_buffer_push(buffer, buffer->data - buffer->head);
5000 if (user_mode_list && *user_mode_list)
5001 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5002 (*user_mode_list)->head));
5007 /* A timeout callback for the re-key. We will be the initiator of the
5010 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_callback)
5012 SilcServer server = app_context;
5013 SilcSocketConnection sock = (SilcSocketConnection)context;
5014 SilcIDListData idata = (SilcIDListData)sock->user_data;
5015 SilcProtocol protocol;
5016 SilcServerRekeyInternalContext *proto_ctx;
5018 /* Allocate internal protocol context. This is sent as context
5020 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
5021 proto_ctx->server = (void *)server;
5022 proto_ctx->sock = sock;
5023 proto_ctx->responder = FALSE;
5024 proto_ctx->pfs = idata->rekey->pfs;
5026 /* Perform rekey protocol. Will call the final callback after the
5027 protocol is over. */
5028 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
5029 &protocol, proto_ctx, silc_server_rekey_final);
5030 sock->protocol = protocol;
5032 /* Run the protocol */
5033 silc_protocol_execute(protocol, server->schedule, 0, 0);
5035 SILC_LOG_DEBUG(("Rekey protocol completed"));
5037 /* Re-register re-key timeout */
5038 silc_schedule_task_add(server->schedule, sock->sock,
5039 silc_server_rekey_callback,
5040 context, idata->rekey->timeout, 0,
5041 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
5044 /* The final callback for the REKEY protocol. This will actually take the
5045 new key material into use. */
5047 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
5049 SilcProtocol protocol = (SilcProtocol)context;
5050 SilcServerRekeyInternalContext *ctx =
5051 (SilcServerRekeyInternalContext *)protocol->context;
5052 SilcServer server = (SilcServer)ctx->server;
5053 SilcSocketConnection sock = ctx->sock;
5055 SILC_LOG_DEBUG(("Start"));
5057 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
5058 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
5059 /* Error occured during protocol */
5060 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
5061 silc_protocol_cancel(protocol, server->schedule);
5062 silc_protocol_free(protocol);
5063 sock->protocol = NULL;
5065 silc_packet_context_free(ctx->packet);
5067 silc_ske_free(ctx->ske);
5072 /* Purge the outgoing data queue to assure that all rekey packets really
5073 go to the network before we quit the protocol. */
5074 silc_server_packet_queue_purge(server, sock);
5077 silc_protocol_free(protocol);
5078 sock->protocol = NULL;
5080 silc_packet_context_free(ctx->packet);
5082 silc_ske_free(ctx->ske);
5086 /* Task callback used to retrieve network statistical information from
5087 router server once in a while. */
5089 SILC_TASK_CALLBACK(silc_server_get_stats)
5091 SilcServer server = (SilcServer)context;
5092 SilcBuffer idp, packet;
5094 SILC_LOG_DEBUG(("Retrieving stats from router"));
5096 if (!server->standalone) {
5097 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5098 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5099 ++server->cmd_ident, 1,
5100 1, idp->data, idp->len);
5101 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5102 SILC_PACKET_COMMAND, 0, packet->data,
5103 packet->len, FALSE);
5104 silc_buffer_free(packet);
5105 silc_buffer_free(idp);
5108 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
5109 server, 120, 0, SILC_TASK_TIMEOUT,