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; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
91 silc_dlist_uninit(server->sim);
95 silc_server_config_unref(&server->config_ref);
97 silc_rng_free(server->rng);
99 silc_pkcs_free(server->pkcs);
100 if (server->public_key)
101 silc_pkcs_public_key_free(server->public_key);
102 if (server->private_key)
103 silc_pkcs_private_key_free(server->private_key);
104 if (server->pending_commands)
105 silc_dlist_uninit(server->pending_commands);
106 if (server->id_entry)
107 silc_idlist_del_server(server->local_list, server->id_entry);
109 silc_idcache_free(server->local_list->clients);
110 silc_idcache_free(server->local_list->servers);
111 silc_idcache_free(server->local_list->channels);
112 silc_idcache_free(server->global_list->clients);
113 silc_idcache_free(server->global_list->servers);
114 silc_idcache_free(server->global_list->channels);
115 silc_hash_table_free(server->watcher_list);
117 silc_hash_free(server->md5hash);
118 silc_hash_free(server->sha1hash);
119 silc_hmac_unregister_all();
120 silc_hash_unregister_all();
121 silc_cipher_unregister_all();
122 silc_pkcs_unregister_all();
124 silc_free(server->local_list);
125 silc_free(server->global_list);
126 silc_free(server->server_name);
127 silc_free(server->id_string);
128 silc_free(server->purge_i);
129 silc_free(server->purge_g);
133 /* Creates a new server listener. */
135 static bool silc_server_listen(SilcServer server, const char *server_ip,
136 SilcUInt16 port, int *sock)
138 *sock = silc_net_create_server(port, server_ip);
140 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
147 /* Adds a secondary listener. */
149 bool silc_server_init_secondary(SilcServer server)
151 int sock = 0, sock_list[server->config->param.connections_max];
152 SilcSocketConnection newsocket = NULL;
153 SilcServerConfigServerInfoInterface *interface;
155 for (interface = server->config->server_info->secondary; interface;
156 interface = interface->next, sock++) {
158 if (!silc_server_listen(server,
159 interface->server_ip, interface->port, &sock_list[sock]))
162 /* Set socket to non-blocking mode */
163 silc_net_set_socket_nonblock(sock_list[sock]);
165 /* Add ourselves also to the socket table. The entry allocated above
166 is sent as argument for fast referencing in the future. */
167 silc_socket_alloc(sock_list[sock],
168 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
169 server->sockets[sock_list[sock]] = newsocket;
170 SILC_SET_LISTENER(newsocket);
172 /* Perform name and address lookups to resolve the listenning address
174 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
176 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
178 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
179 newsocket->hostname ? newsocket->hostname :
180 newsocket->ip ? newsocket->ip : ""));
181 server->stat.conn_failures++;
184 if (!newsocket->hostname)
185 newsocket->hostname = strdup(newsocket->ip);
187 newsocket->port = silc_net_get_local_port(sock);
189 newsocket->user_data = (void *)server->id_entry;
190 silc_schedule_task_add(server->schedule, sock_list[sock],
191 silc_server_accept_new_connection,
192 (void *)server, 0, 0,
194 SILC_TASK_PRI_NORMAL);
200 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
204 /* Initializes the entire SILC server. This is called always before running
205 the server. This is called only once at the initialization of the program.
206 This binds the server to its listenning port. After this function returns
207 one should call silc_server_run to start the server. This returns TRUE
208 when everything is ok to run the server. Configuration file must be
209 read and parsed before calling this. */
211 bool silc_server_init(SilcServer server)
215 SilcServerEntry id_entry;
216 SilcIDListPurge purge;
217 SilcSocketConnection newsocket = NULL;
219 SILC_LOG_DEBUG(("Initializing server"));
221 server->starttime = time(NULL);
223 /* Take config object for us */
224 silc_server_config_ref(&server->config_ref, server->config,
227 /* Steal public and private key from the config object */
228 server->public_key = server->config->server_info->public_key;
229 server->private_key = server->config->server_info->private_key;
230 server->config->server_info->public_key = NULL;
231 server->config->server_info->private_key = NULL;
233 /* Register all configured ciphers, PKCS and hash functions. */
234 if (!silc_server_config_register_ciphers(server))
235 silc_cipher_register_default();
236 if (!silc_server_config_register_pkcs(server))
237 silc_pkcs_register_default();
238 if (!silc_server_config_register_hashfuncs(server))
239 silc_hash_register_default();
240 if (!silc_server_config_register_hmacs(server))
241 silc_hmac_register_default();
243 /* Initialize random number generator for the server. */
244 server->rng = silc_rng_alloc();
245 silc_rng_init(server->rng);
246 silc_rng_global_init(server->rng);
248 /* Initialize hash functions for server to use */
249 silc_hash_alloc("md5", &server->md5hash);
250 silc_hash_alloc("sha1", &server->sha1hash);
252 /* Allocate PKCS context for local public and private keys */
253 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
255 silc_pkcs_public_key_set(server->pkcs, server->public_key);
256 silc_pkcs_private_key_set(server->pkcs, server->private_key);
258 /* Initialize the scheduler */
259 server->schedule = silc_schedule_init(server->config->param.connections_max);
260 if (!server->schedule)
263 /* First, register log files configuration for error output */
264 silc_server_config_setlogfiles(server);
266 /* Initialize ID caches */
267 server->local_list->clients =
268 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
269 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
270 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
272 /* These are allocated for normal server as well as these hold some
273 global information that the server has fetched from its router. For
274 router these are used as they are supposed to be used on router. */
275 server->global_list->clients =
276 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
277 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
278 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
280 /* Init watcher list */
281 server->watcher_list =
282 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
283 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
285 if (!server->watcher_list)
288 /* Create a listening server */
289 if (!silc_server_listen(server,
290 server->config->server_info->primary == NULL ? NULL :
291 server->config->server_info->primary->server_ip,
292 server->config->server_info->primary == NULL ? 0 :
293 server->config->server_info->primary->port,
297 /* Set socket to non-blocking mode */
298 silc_net_set_socket_nonblock(sock);
301 /* Allocate the entire socket list that is used in server. Eventually
302 all connections will have entry in this table (it is a table of
303 pointers to the actual object that is allocated individually
305 server->sockets = silc_calloc(server->config->param.connections_max,
306 sizeof(*server->sockets));
307 if (!server->sockets)
310 /* Add ourselves also to the socket table. The entry allocated above
311 is sent as argument for fast referencing in the future. */
312 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
313 server->sockets[sock] = newsocket;
314 SILC_SET_LISTENER(newsocket);
316 /* Perform name and address lookups to resolve the listenning address
318 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
320 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
322 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
323 newsocket->hostname ? newsocket->hostname :
324 newsocket->ip ? newsocket->ip : ""));
325 server->stat.conn_failures++;
328 if (!newsocket->hostname)
329 newsocket->hostname = strdup(newsocket->ip);
331 newsocket->port = silc_net_get_local_port(sock);
333 /* Create a Server ID for the server. */
334 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
339 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
340 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
341 server->server_name = server->config->server_info->server_name;
342 server->config->server_info->server_name = NULL;
344 /* Add ourselves to the server list. We don't have a router yet
345 beacuse we haven't established a route yet. It will be done later.
346 For now, NULL is sent as router. This allocates new entry to
349 silc_idlist_add_server(server->local_list, strdup(server->server_name),
350 server->server_type, server->id, NULL, NULL);
352 SILC_LOG_ERROR(("Could not add ourselves to cache"));
355 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
357 /* Put the allocated socket pointer also to the entry allocated above
358 for fast back-referencing to the socket list. */
359 newsocket->user_data = (void *)id_entry;
360 id_entry->connection = (void *)newsocket;
361 server->id_entry = id_entry;
363 /* Register protocols */
364 silc_server_protocols_register();
366 /* Add the first task to the scheduler. This is task that is executed by
367 timeout. It expires as soon as the caller calls silc_server_run. This
368 task performs authentication protocol and key exchange with our
370 silc_schedule_task_add(server->schedule, 0,
371 silc_server_connect_to_router,
372 (void *)server, 0, 1,
374 SILC_TASK_PRI_NORMAL);
376 /* Add listener task to the scheduler. This task receives new connections
377 to the server. This task remains on the queue until the end of the
379 silc_schedule_task_add(server->schedule, sock,
380 silc_server_accept_new_connection,
381 (void *)server, 0, 0,
383 SILC_TASK_PRI_NORMAL);
385 if (silc_server_init_secondary(server) == FALSE)
388 server->listenning = TRUE;
390 /* If server connections has been configured then we must be router as
391 normal server cannot have server connections, only router connections. */
392 if (server->config->servers) {
393 SilcServerConfigServer *ptr = server->config->servers;
395 server->server_type = SILC_ROUTER;
397 if (ptr->backup_router) {
398 server->server_type = SILC_BACKUP_ROUTER;
399 server->backup_router = TRUE;
400 server->id_entry->server_type = SILC_BACKUP_ROUTER;
407 /* Register the ID Cache purge task. This periodically purges the ID cache
408 and removes the expired cache entries. */
410 /* Clients local list */
411 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
412 purge->cache = server->local_list->clients;
413 purge->schedule = server->schedule;
414 purge->timeout = 600;
415 silc_schedule_task_add(purge->schedule, 0,
417 (void *)purge, purge->timeout, 0,
418 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
420 /* Clients global list */
421 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
422 purge->cache = server->global_list->clients;
423 purge->schedule = server->schedule;
424 purge->timeout = 300;
425 silc_schedule_task_add(purge->schedule, 0,
427 (void *)purge, purge->timeout, 0,
428 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
430 /* If we are normal server we'll retrieve network statisticial information
431 once in a while from the router. */
432 if (server->server_type == SILC_SERVER)
433 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
434 server, 10, 0, SILC_TASK_TIMEOUT,
437 if (server->server_type == SILC_ROUTER)
438 server->stat.routers++;
440 SILC_LOG_DEBUG(("Server initialized"));
442 /* We are done here, return succesfully */
446 silc_server_config_unref(&server->config_ref);
447 silc_net_close_server(sock);
451 /* This function basically reads the config file again and switches the config
452 object pointed by the server object. After that, we have to fix various
453 things such as the server_name and the listening ports.
454 Keep in mind that we no longer have the root privileges at this point. */
456 bool silc_server_rehash(SilcServer server)
458 SilcServerConfig newconfig;
460 SILC_LOG_INFO(("Rehashing server"));
462 /* Reset the logging system */
463 silc_log_quick = TRUE;
464 silc_log_flush_all();
466 /* Start the main rehash phase (read again the config file) */
467 newconfig = silc_server_config_alloc(server->config_file);
469 SILC_LOG_ERROR(("Rehash FAILED."));
473 /* Reinit scheduler if necessary */
474 if (newconfig->param.connections_max > server->config->param.connections_max)
475 if (!silc_schedule_reinit(server->schedule,
476 newconfig->param.connections_max))
479 /* Fix the server_name field */
480 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
481 silc_free(server->server_name);
482 server->server_name = newconfig->server_info->server_name;
483 newconfig->server_info->server_name = NULL;
485 /* Update the idcache list with a fresh pointer */
486 silc_free(server->id_entry->server_name);
487 server->id_entry->server_name = strdup(server->server_name);
488 if (!silc_idcache_del_by_context(server->local_list->servers,
491 if (!silc_idcache_add(server->local_list->servers,
492 server->id_entry->server_name,
493 server->id_entry->id, server->id_entry, 0, NULL))
498 silc_server_config_setlogfiles(server);
500 /* Change new key pair if necessary */
501 if (newconfig->server_info->public_key &&
502 !silc_pkcs_public_key_compare(server->public_key,
503 newconfig->server_info->public_key)) {
504 silc_pkcs_public_key_free(server->public_key);
505 silc_pkcs_private_key_free(server->private_key);
506 server->public_key = newconfig->server_info->public_key;
507 server->private_key = newconfig->server_info->private_key;
508 newconfig->server_info->public_key = NULL;
509 newconfig->server_info->private_key = NULL;
511 /* Allocate PKCS context for local public and private keys */
512 silc_pkcs_free(server->pkcs);
513 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
515 silc_pkcs_public_key_set(server->pkcs, server->public_key);
516 silc_pkcs_private_key_set(server->pkcs, server->private_key);
519 /* Go through all configured routers after rehash */
520 silc_schedule_task_add(server->schedule, 0,
521 silc_server_connect_to_router,
522 (void *)server, 0, 1,
524 SILC_TASK_PRI_NORMAL);
526 /* Check whether our router status has changed */
527 if (newconfig->servers) {
528 SilcServerConfigServer *ptr = newconfig->servers;
530 server->server_type = SILC_ROUTER;
532 if (ptr->backup_router) {
533 server->server_type = SILC_BACKUP_ROUTER;
534 server->backup_router = TRUE;
535 server->id_entry->server_type = SILC_BACKUP_ROUTER;
542 /* Our old config is gone now. We'll unreference our reference made in
543 silc_server_init and then destroy it since we are destroying it
544 underneath the application (layer which called silc_server_init). */
545 silc_server_config_unref(&server->config_ref);
546 silc_server_config_destroy(server->config);
548 /* Take new config context */
549 server->config = newconfig;
550 silc_server_config_ref(&server->config_ref, server->config, server->config);
552 SILC_LOG_DEBUG(("Server rehashed"));
557 /* The heart of the server. This runs the scheduler thus runs the server.
558 When this returns the server has been stopped and the program will
561 void silc_server_run(SilcServer server)
563 SILC_LOG_INFO(("SILC Server started"));
565 /* Start the scheduler, the heart of the SILC server. When this returns
566 the program will be terminated. */
567 silc_schedule(server->schedule);
570 /* Stops the SILC server. This function is used to shutdown the server.
571 This is usually called after the scheduler has returned. After stopping
572 the server one should call silc_server_free. */
574 void silc_server_stop(SilcServer server)
576 SILC_LOG_DEBUG(("Stopping server"));
578 if (server->schedule) {
581 /* Close all connections */
582 for (i = 0; i < server->config->param.connections_max; i++) {
583 if (!server->sockets[i])
585 if (!SILC_IS_LISTENER(server->sockets[i])) {
586 silc_schedule_task_del_by_context(server->schedule,
588 silc_server_disconnect_remote(server, server->sockets[i],
590 "Server is shutting down");
592 silc_socket_free(server->sockets[i]);
593 server->sockets[i] = NULL;
597 /* We are not connected to network anymore */
598 server->standalone = TRUE;
600 silc_schedule_stop(server->schedule);
601 silc_schedule_uninit(server->schedule);
602 server->schedule = NULL;
604 silc_free(server->sockets);
605 server->sockets = NULL;
608 silc_server_protocols_unregister();
610 SILC_LOG_DEBUG(("Server stopped"));
613 /* Function that is called when the network connection to a router has
614 been established. This will continue with the key exchange protocol
615 with the remote router. */
617 void silc_server_start_key_exchange(SilcServer server,
618 SilcServerConnection sconn,
621 SilcSocketConnection newsocket;
622 SilcProtocol protocol;
623 SilcServerKEInternalContext *proto_ctx;
624 SilcServerConfigRouter *conn =
625 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
628 /* Cancel any possible retry timeouts */
629 silc_schedule_task_del_by_callback(server->schedule,
630 silc_server_connect_to_router_retry);
632 /* Set socket options */
633 silc_net_set_socket_nonblock(sock);
634 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
636 /* Create socket connection for the connection. Even though we
637 know that we are connecting to a router we will mark the socket
638 to be unknown connection until we have executed authentication
640 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
641 server->sockets[sock] = newsocket;
642 newsocket->hostname = strdup(sconn->remote_host);
643 newsocket->ip = strdup(sconn->remote_host);
644 newsocket->port = sconn->remote_port;
645 sconn->sock = newsocket;
647 /* Allocate internal protocol context. This is sent as context
649 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
650 proto_ctx->server = (void *)server;
651 proto_ctx->context = (void *)sconn;
652 proto_ctx->sock = newsocket;
653 proto_ctx->rng = server->rng;
654 proto_ctx->responder = FALSE;
656 /* Set Key Exchange flags from configuration, but fall back to global
658 SILC_GET_SKE_FLAGS(conn, proto_ctx);
659 if (server->config->param.key_exchange_pfs)
660 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
662 /* Perform key exchange protocol. silc_server_connect_to_router_second
663 will be called after the protocol is finished. */
664 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
665 &protocol, proto_ctx,
666 silc_server_connect_to_router_second);
667 newsocket->protocol = protocol;
669 /* Register a timeout task that will be executed if the protocol
670 is not executed within set limit. */
671 proto_ctx->timeout_task =
672 silc_schedule_task_add(server->schedule, sock,
673 silc_server_timeout_remote,
674 server, server->config->key_exchange_timeout, 0,
678 /* Register the connection for network input and output. This sets
679 that scheduler will listen for incoming packets for this connection
680 and sets that outgoing packets may be sent to this connection as
681 well. However, this doesn't set the scheduler for outgoing traffic,
682 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
683 later when outgoing data is available. */
684 context = (void *)server;
685 SILC_REGISTER_CONNECTION_FOR_IO(sock);
687 /* Run the protocol */
688 silc_protocol_execute(protocol, server->schedule, 0, 0);
691 /* Timeout callback that will be called to retry connecting to remote
692 router. This is used by both normal and router server. This will wait
693 before retrying the connecting. The timeout is generated by exponential
694 backoff algorithm. */
696 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
698 SilcServerConnection sconn = (SilcServerConnection)context;
699 SilcServer server = sconn->server;
700 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
701 SilcServerConfigConnParams *param =
702 (conn->param ? conn->param : &server->config->param);
704 SILC_LOG_INFO(("Retrying connecting to a router"));
706 /* Calculate next timeout */
707 if (sconn->retry_count >= 1) {
708 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
709 if (sconn->retry_timeout > param->reconnect_interval_max)
710 sconn->retry_timeout = param->reconnect_interval_max;
712 sconn->retry_timeout = param->reconnect_interval;
714 sconn->retry_count++;
715 sconn->retry_timeout = sconn->retry_timeout +
716 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
718 /* If we've reached max retry count, give up. */
719 if ((sconn->retry_count > param->reconnect_count) &&
720 !param->reconnect_keep_trying) {
721 SILC_LOG_ERROR(("Could not connect to router, giving up"));
722 silc_server_config_unref(&sconn->conn);
723 silc_free(sconn->remote_host);
724 silc_free(sconn->backup_replace_ip);
729 /* We will lookup a fresh pointer later */
730 silc_server_config_unref(&sconn->conn);
732 /* Wait one before retrying */
733 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
734 context, sconn->retry_timeout, 0,
735 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
738 /* Generic routine to use connect to a router. */
740 SILC_TASK_CALLBACK(silc_server_connect_router)
742 SilcServerConnection sconn = (SilcServerConnection)context;
743 SilcServer server = sconn->server;
744 SilcServerConfigRouter *rconn;
747 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
748 (sconn->backup ? "backup router" : "router"),
749 sconn->remote_host, sconn->remote_port));
751 server->router_connect = time(NULL);
752 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
755 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
756 (sconn->backup ? "backup router" : "router"),
757 sconn->remote_host, sconn->remote_port));
758 silc_free(sconn->remote_host);
759 silc_free(sconn->backup_replace_ip);
763 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
765 /* Connect to remote host */
766 sock = silc_net_create_connection(
767 (!server->config->server_info->primary ? NULL :
768 server->config->server_info->primary->server_ip),
769 sconn->remote_port, sconn->remote_host);
771 SILC_LOG_ERROR(("Could not connect to router %s:%d",
772 sconn->remote_host, sconn->remote_port));
773 if (!sconn->no_reconnect)
774 silc_schedule_task_add(server->schedule, 0,
775 silc_server_connect_to_router_retry,
776 context, 0, 1, SILC_TASK_TIMEOUT,
777 SILC_TASK_PRI_NORMAL);
779 silc_server_config_unref(&sconn->conn);
783 /* Continue with key exchange protocol */
784 silc_server_start_key_exchange(server, sconn, sock);
787 /* This function connects to our primary router or if we are a router this
788 establishes all our primary routes. This is called at the start of the
789 server to do authentication and key exchange with our router - called
792 SILC_TASK_CALLBACK(silc_server_connect_to_router)
794 SilcServer server = (SilcServer)context;
795 SilcServerConnection sconn;
796 SilcServerConfigRouter *ptr;
798 SILC_LOG_DEBUG(("Connecting to router(s)"));
800 if (server->server_type == SILC_SERVER) {
801 SILC_LOG_DEBUG(("We are normal server"));
802 } else if (server->server_type == SILC_ROUTER) {
803 SILC_LOG_DEBUG(("We are router"));
805 SILC_LOG_DEBUG(("We are backup router/normal server"));
808 if (!server->config->routers) {
809 /* There wasn't a configured router, we will continue but we don't
810 have a connection to outside world. We will be standalone server. */
811 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
812 server->standalone = TRUE;
816 /* Cancel any possible retry timeouts */
817 silc_schedule_task_del_by_callback(server->schedule,
818 silc_server_connect_router);
819 silc_schedule_task_del_by_callback(server->schedule,
820 silc_server_connect_to_router_retry);
822 /* Create the connections to all our routes */
823 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
825 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
826 ptr->backup_router ? "Backup router" : "Router",
827 ptr->initiator ? "Initiator" : "Responder",
828 ptr->host, ptr->port));
830 if (ptr->initiator) {
831 /* Check whether we are connected to this host already */
832 if (silc_server_num_sockets_by_remote(server,
833 silc_net_is_ip(ptr->host) ?
835 silc_net_is_ip(ptr->host) ?
836 NULL : ptr->host, ptr->port,
837 SILC_SOCKET_TYPE_ROUTER)) {
838 SILC_LOG_DEBUG(("We are already connected to this router"));
842 /* Allocate connection object for hold connection specific stuff. */
843 sconn = silc_calloc(1, sizeof(*sconn));
844 sconn->server = server;
845 sconn->remote_host = strdup(ptr->host);
846 sconn->remote_port = ptr->port;
847 sconn->backup = ptr->backup_router;
849 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
850 sconn->backup_replace_port = ptr->backup_replace_port;
853 if (!server->router_conn && !sconn->backup)
854 server->router_conn = sconn;
856 silc_schedule_task_add(server->schedule, 0,
857 silc_server_connect_router,
858 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
859 SILC_TASK_PRI_NORMAL);
864 /* Second part of connecting to router(s). Key exchange protocol has been
865 executed and now we will execute authentication protocol. */
867 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
869 SilcProtocol protocol = (SilcProtocol)context;
870 SilcServerKEInternalContext *ctx =
871 (SilcServerKEInternalContext *)protocol->context;
872 SilcServer server = (SilcServer)ctx->server;
873 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
874 SilcSocketConnection sock = ctx->sock;
875 SilcServerConnAuthInternalContext *proto_ctx;
876 SilcServerConfigRouter *conn = NULL;
878 SILC_LOG_DEBUG(("Start"));
880 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
881 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
882 /* Error occured during protocol */
883 silc_protocol_free(protocol);
884 sock->protocol = NULL;
885 silc_ske_free_key_material(ctx->keymat);
887 silc_packet_context_free(ctx->packet);
889 silc_ske_free(ctx->ske);
890 silc_free(ctx->dest_id);
892 silc_server_config_unref(&sconn->conn);
893 silc_free(sconn->remote_host);
894 silc_free(sconn->backup_replace_ip);
896 silc_schedule_task_del_by_callback(server->schedule,
897 silc_server_failure_callback);
898 silc_server_disconnect_remote(server, sock,
899 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
903 /* We now have the key material as the result of the key exchange
904 protocol. Take the key material into use. Free the raw key material
905 as soon as we've set them into use. */
906 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
907 ctx->sock, ctx->keymat,
908 ctx->ske->prop->cipher,
909 ctx->ske->prop->pkcs,
910 ctx->ske->prop->hash,
911 ctx->ske->prop->hmac,
912 ctx->ske->prop->group,
914 silc_protocol_free(protocol);
915 sock->protocol = NULL;
916 silc_ske_free_key_material(ctx->keymat);
918 silc_packet_context_free(ctx->packet);
920 silc_ske_free(ctx->ske);
921 silc_free(ctx->dest_id);
923 silc_server_config_unref(&sconn->conn);
924 silc_free(sconn->remote_host);
925 silc_free(sconn->backup_replace_ip);
927 silc_schedule_task_del_by_callback(server->schedule,
928 silc_server_failure_callback);
929 silc_server_disconnect_remote(server, sock,
930 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
933 silc_ske_free_key_material(ctx->keymat);
935 /* Allocate internal context for the authentication protocol. This
936 is sent as context for the protocol. */
937 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
938 proto_ctx->server = (void *)server;
939 proto_ctx->context = (void *)sconn;
940 proto_ctx->sock = sock;
941 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
942 proto_ctx->dest_id_type = ctx->dest_id_type;
943 proto_ctx->dest_id = ctx->dest_id;
945 /* Resolve the authentication method used in this connection. Check if
946 we find a match from user configured connections */
947 if (!sconn->conn.ref_ptr)
948 conn = silc_server_config_find_router_conn(server, sock->hostname,
951 conn = sconn->conn.ref_ptr;
954 /* Match found. Use the configured authentication method. Take only
955 the passphrase, since for public key auth we automatically use
956 our local key pair. */
957 if (conn->passphrase) {
958 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
959 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
961 proto_ctx->auth_data = strdup(conn->passphrase);
962 proto_ctx->auth_data_len = strlen(conn->passphrase);
963 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
965 } else if (conn->publickeys) {
966 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
968 proto_ctx->auth_meth = SILC_AUTH_NONE;
971 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
972 sock->hostname, sock->ip, sock->port));
973 silc_protocol_free(protocol);
974 sock->protocol = NULL;
976 silc_packet_context_free(ctx->packet);
978 silc_ske_free(ctx->ske);
979 silc_free(ctx->dest_id);
981 silc_server_config_unref(&sconn->conn);
982 silc_free(sconn->remote_host);
983 silc_free(sconn->backup_replace_ip);
985 silc_schedule_task_del_by_callback(server->schedule,
986 silc_server_failure_callback);
987 silc_server_disconnect_remote(server, sock,
988 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
992 /* Free old protocol as it is finished now */
993 silc_protocol_free(protocol);
995 silc_packet_context_free(ctx->packet);
997 sock->protocol = NULL;
999 /* Allocate the authentication protocol. This is allocated here
1000 but we won't start it yet. We will be receiving party of this
1001 protocol thus we will wait that connecting party will make
1002 their first move. */
1003 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1004 &sock->protocol, proto_ctx,
1005 silc_server_connect_to_router_final);
1007 /* Register timeout task. If the protocol is not executed inside
1008 this timelimit the connection will be terminated. */
1009 proto_ctx->timeout_task =
1010 silc_schedule_task_add(server->schedule, sock->sock,
1011 silc_server_timeout_remote,
1013 server->config->conn_auth_timeout, 0,
1017 /* Run the protocol */
1018 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1021 /* Finalizes the connection to router. Registers a server task to the
1022 queue so that we can accept new connections. */
1024 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1026 SilcProtocol protocol = (SilcProtocol)context;
1027 SilcServerConnAuthInternalContext *ctx =
1028 (SilcServerConnAuthInternalContext *)protocol->context;
1029 SilcServer server = (SilcServer)ctx->server;
1030 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1031 SilcSocketConnection sock = ctx->sock;
1032 SilcServerEntry id_entry;
1034 SilcServerHBContext hb_context;
1035 unsigned char *id_string;
1037 SilcIDListData idata;
1038 SilcServerConfigRouter *conn = NULL;
1039 SilcServerConfigConnParams *param = NULL;
1041 SILC_LOG_DEBUG(("Start"));
1043 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1044 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1045 /* Error occured during protocol */
1046 silc_free(ctx->dest_id);
1047 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1052 /* Add a task to the queue. This task receives new connections to the
1053 server. This task remains on the queue until the end of the program. */
1054 if (!server->listenning && !sconn->backup) {
1055 silc_schedule_task_add(server->schedule, server->sock,
1056 silc_server_accept_new_connection,
1057 (void *)server, 0, 0,
1059 SILC_TASK_PRI_NORMAL);
1060 server->listenning = TRUE;
1063 /* Send NEW_SERVER packet to the router. We will become registered
1064 to the SILC network after sending this packet. */
1065 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1066 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1067 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1068 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1069 silc_buffer_format(packet,
1070 SILC_STR_UI_SHORT(id_len),
1071 SILC_STR_UI_XNSTRING(id_string, id_len),
1072 SILC_STR_UI_SHORT(strlen(server->server_name)),
1073 SILC_STR_UI_XNSTRING(server->server_name,
1074 strlen(server->server_name)),
1077 /* Send the packet */
1078 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1079 packet->data, packet->len, TRUE);
1080 silc_buffer_free(packet);
1081 silc_free(id_string);
1083 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1085 /* Check that we do not have this ID already */
1086 id_entry = silc_idlist_find_server_by_id(server->local_list,
1087 ctx->dest_id, TRUE, NULL);
1089 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1091 id_entry = silc_idlist_find_server_by_id(server->global_list,
1092 ctx->dest_id, TRUE, NULL);
1094 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1097 SILC_LOG_DEBUG(("New server id(%s)",
1098 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1100 /* Add the connected router to global server list */
1101 id_entry = silc_idlist_add_server(server->global_list,
1102 strdup(sock->hostname),
1103 SILC_ROUTER, ctx->dest_id, NULL, sock);
1105 silc_free(ctx->dest_id);
1106 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1107 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1112 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1113 silc_free(sock->user_data);
1114 sock->user_data = (void *)id_entry;
1115 sock->type = SILC_SOCKET_TYPE_ROUTER;
1116 idata = (SilcIDListData)sock->user_data;
1117 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1119 conn = sconn->conn.ref_ptr;
1120 param = &server->config->param;
1121 if (conn && conn->param)
1122 param = conn->param;
1124 /* Perform keepalive. The `hb_context' will be freed automatically
1125 when finally calling the silc_socket_free function. */
1126 hb_context = silc_calloc(1, sizeof(*hb_context));
1127 hb_context->server = server;
1128 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1129 silc_server_perform_heartbeat,
1132 /* Register re-key timeout */
1133 idata->rekey->timeout = param->key_exchange_rekey;
1134 idata->rekey->context = (void *)server;
1135 silc_schedule_task_add(server->schedule, sock->sock,
1136 silc_server_rekey_callback,
1137 (void *)sock, idata->rekey->timeout, 0,
1138 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1140 if (!sconn->backup) {
1141 /* Mark this router our primary router if we're still standalone */
1142 if (server->standalone) {
1143 server->id_entry->router = id_entry;
1144 server->router = id_entry;
1145 server->standalone = FALSE;
1147 /* If we are router then announce our possible servers. */
1148 if (server->server_type == SILC_ROUTER)
1149 silc_server_announce_servers(server, FALSE, 0,
1150 server->router->connection);
1152 /* Announce our clients and channels to the router */
1153 silc_server_announce_clients(server, 0, server->router->connection);
1154 silc_server_announce_channels(server, 0, server->router->connection);
1156 #ifdef BACKUP_SINGLE_ROUTER
1157 /* If we are backup router then this primary router is whom we are
1159 if (server->server_type == SILC_BACKUP_ROUTER)
1160 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1161 #endif /* BACKUP_SINGLE_ROUTER */
1164 /* Add this server to be our backup router */
1165 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1166 sconn->backup_replace_port, FALSE);
1169 sock->protocol = NULL;
1171 /* Call the completion callback to indicate that we've connected to
1173 if (sconn->callback)
1174 (*sconn->callback)(server, id_entry, sconn->callback_context);
1177 /* Free the temporary connection data context */
1179 silc_server_config_unref(&sconn->conn);
1180 silc_free(sconn->remote_host);
1181 silc_free(sconn->backup_replace_ip);
1184 if (sconn == server->router_conn)
1185 server->router_conn = NULL;
1187 /* Free the protocol object */
1188 if (sock->protocol == protocol)
1189 sock->protocol = NULL;
1190 silc_protocol_free(protocol);
1192 silc_packet_context_free(ctx->packet);
1194 silc_ske_free(ctx->ske);
1195 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1196 silc_free(ctx->auth_data);
1200 /* Host lookup callback that is called after the incoming connection's
1201 IP and FQDN lookup is performed. This will actually check the acceptance
1202 of the incoming connection and will register the key exchange protocol
1203 for this connection. */
1206 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1209 SilcServerKEInternalContext *proto_ctx =
1210 (SilcServerKEInternalContext *)context;
1211 SilcServer server = (SilcServer)proto_ctx->server;
1212 SilcServerConfigClient *cconfig = NULL;
1213 SilcServerConfigServer *sconfig = NULL;
1214 SilcServerConfigRouter *rconfig = NULL;
1215 SilcServerConfigDeny *deny;
1218 context = (void *)server;
1220 SILC_LOG_DEBUG(("Start"));
1222 /* Check whether we could resolve both IP and FQDN. */
1223 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1224 server->config->require_reverse_lookup)) {
1225 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1226 sock->hostname ? sock->hostname :
1227 sock->ip ? sock->ip : ""));
1228 server->stat.conn_failures++;
1229 silc_server_disconnect_remote(server, sock,
1230 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1231 "Unknown host or IP");
1232 silc_free(proto_ctx);
1236 /* Register the connection for network input and output. This sets
1237 that scheduler will listen for incoming packets for this connection
1238 and sets that outgoing packets may be sent to this connection as well.
1239 However, this doesn't set the scheduler for outgoing traffic, it
1240 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1241 later when outgoing data is available. */
1242 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1244 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1247 /* Listenning port */
1248 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1249 silc_server_disconnect_remote(server, sock,
1250 SILC_STATUS_ERR_RESOURCE_LIMIT,
1251 "Connection refused");
1252 server->stat.conn_failures++;
1253 silc_free(proto_ctx);
1256 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1258 /* Check whether this connection is denied to connect to us. */
1259 deny = silc_server_config_find_denied(server, sock->ip);
1261 deny = silc_server_config_find_denied(server, sock->hostname);
1263 /* The connection is denied */
1264 SILC_LOG_INFO(("Connection %s (%s) is denied",
1265 sock->hostname, sock->ip));
1266 silc_server_disconnect_remote(server, sock,
1267 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1269 server->stat.conn_failures++;
1270 silc_free(proto_ctx);
1274 /* Check whether we have configured this sort of connection at all. We
1275 have to check all configurations since we don't know what type of
1276 connection this is. */
1277 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1278 cconfig = silc_server_config_find_client(server, sock->hostname);
1279 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1280 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1281 if (server->server_type == SILC_ROUTER) {
1282 if (!(rconfig = silc_server_config_find_router_conn(server,
1283 sock->ip, sock->port)))
1284 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1287 if (!cconfig && !sconfig && !rconfig) {
1288 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1290 silc_server_disconnect_remote(server, sock,
1291 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1292 server->stat.conn_failures++;
1293 silc_free(proto_ctx);
1297 /* The connection is allowed */
1299 /* Set internal context for key exchange protocol. This is
1300 sent as context for the protocol. */
1301 proto_ctx->sock = sock;
1302 proto_ctx->rng = server->rng;
1303 proto_ctx->responder = TRUE;
1304 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1305 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1306 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1308 /* Take flags for key exchange. Since we do not know what type of connection
1309 this is, we go through all found configurations and use the global ones
1310 as well. This will result always into strictest key exchange flags. */
1311 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1312 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1313 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1314 if (server->config->param.key_exchange_pfs)
1315 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1317 /* Prepare the connection for key exchange protocol. We allocate the
1318 protocol but will not start it yet. The connector will be the
1319 initiator of the protocol thus we will wait for initiation from
1320 there before we start the protocol. */
1321 server->stat.auth_attempts++;
1322 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1323 &sock->protocol, proto_ctx,
1324 silc_server_accept_new_connection_second);
1326 /* Register a timeout task that will be executed if the connector
1327 will not start the key exchange protocol within specified timeout
1328 and the connection will be closed. */
1329 proto_ctx->timeout_task =
1330 silc_schedule_task_add(server->schedule, sock->sock,
1331 silc_server_timeout_remote,
1333 server->config->key_exchange_timeout, 0,
1338 /* Accepts new connections to the server. Accepting new connections are
1339 done in three parts to make it async. */
1341 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1343 SilcServer server = (SilcServer)context;
1344 SilcSocketConnection newsocket;
1345 SilcServerKEInternalContext *proto_ctx;
1348 SILC_LOG_DEBUG(("Accepting new connection"));
1350 server->stat.conn_attempts++;
1352 sock = silc_net_accept_connection(fd);
1354 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1355 server->stat.conn_failures++;
1359 /* Check for maximum allowed connections */
1360 if (sock > server->config->param.connections_max) {
1361 SILC_LOG_ERROR(("Refusing connection, server is full"));
1362 server->stat.conn_failures++;
1363 silc_net_close_connection(sock);
1367 /* Set socket options */
1368 silc_net_set_socket_nonblock(sock);
1369 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1371 /* We don't create a ID yet, since we don't know what type of connection
1372 this is yet. But, we do add the connection to the socket table. */
1373 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1374 server->sockets[sock] = newsocket;
1376 /* Perform asynchronous host lookup. This will lookup the IP and the
1377 FQDN of the remote connection. After the lookup is done the connection
1378 is accepted further. */
1379 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1380 proto_ctx->server = server;
1381 proto_ctx->context = (void *)fd;
1382 silc_socket_host_lookup(newsocket, TRUE,
1383 silc_server_accept_new_connection_lookup,
1384 (void *)proto_ctx, server->schedule);
1387 /* Second part of accepting new connection. Key exchange protocol has been
1388 performed and now it is time to do little connection authentication
1389 protocol to figure out whether this connection is client or server
1390 and whether it has right to access this server (especially server
1391 connections needs to be authenticated). */
1393 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1395 SilcProtocol protocol = (SilcProtocol)context;
1396 SilcServerKEInternalContext *ctx =
1397 (SilcServerKEInternalContext *)protocol->context;
1398 SilcServer server = (SilcServer)ctx->server;
1399 SilcSocketConnection sock = ctx->sock;
1400 SilcServerConnAuthInternalContext *proto_ctx;
1402 SILC_LOG_DEBUG(("Start"));
1404 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1405 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1406 /* Error occured during protocol */
1407 silc_protocol_free(protocol);
1408 sock->protocol = NULL;
1409 silc_ske_free_key_material(ctx->keymat);
1411 silc_packet_context_free(ctx->packet);
1413 silc_ske_free(ctx->ske);
1414 silc_free(ctx->dest_id);
1415 silc_server_config_unref(&ctx->cconfig);
1416 silc_server_config_unref(&ctx->sconfig);
1417 silc_server_config_unref(&ctx->rconfig);
1419 silc_schedule_task_del_by_callback(server->schedule,
1420 silc_server_failure_callback);
1421 silc_server_disconnect_remote(server, sock,
1422 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1424 server->stat.auth_failures++;
1428 /* We now have the key material as the result of the key exchange
1429 protocol. Take the key material into use. Free the raw key material
1430 as soon as we've set them into use. */
1431 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1432 ctx->sock, ctx->keymat,
1433 ctx->ske->prop->cipher,
1434 ctx->ske->prop->pkcs,
1435 ctx->ske->prop->hash,
1436 ctx->ske->prop->hmac,
1437 ctx->ske->prop->group,
1439 silc_protocol_free(protocol);
1440 sock->protocol = NULL;
1441 silc_ske_free_key_material(ctx->keymat);
1443 silc_packet_context_free(ctx->packet);
1445 silc_ske_free(ctx->ske);
1446 silc_free(ctx->dest_id);
1447 silc_server_config_unref(&ctx->cconfig);
1448 silc_server_config_unref(&ctx->sconfig);
1449 silc_server_config_unref(&ctx->rconfig);
1451 silc_schedule_task_del_by_callback(server->schedule,
1452 silc_server_failure_callback);
1453 silc_server_disconnect_remote(server, sock,
1454 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1455 server->stat.auth_failures++;
1458 silc_ske_free_key_material(ctx->keymat);
1460 /* Allocate internal context for the authentication protocol. This
1461 is sent as context for the protocol. */
1462 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1463 proto_ctx->server = (void *)server;
1464 proto_ctx->sock = sock;
1465 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1466 proto_ctx->responder = TRUE;
1467 proto_ctx->dest_id_type = ctx->dest_id_type;
1468 proto_ctx->dest_id = ctx->dest_id;
1469 proto_ctx->cconfig = ctx->cconfig;
1470 proto_ctx->sconfig = ctx->sconfig;
1471 proto_ctx->rconfig = ctx->rconfig;
1473 /* Free old protocol as it is finished now */
1474 silc_protocol_free(protocol);
1476 silc_packet_context_free(ctx->packet);
1478 sock->protocol = NULL;
1480 /* Allocate the authentication protocol. This is allocated here
1481 but we won't start it yet. We will be receiving party of this
1482 protocol thus we will wait that connecting party will make
1483 their first move. */
1484 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1485 &sock->protocol, proto_ctx,
1486 silc_server_accept_new_connection_final);
1488 /* Register timeout task. If the protocol is not executed inside
1489 this timelimit the connection will be terminated. */
1490 proto_ctx->timeout_task =
1491 silc_schedule_task_add(server->schedule, sock->sock,
1492 silc_server_timeout_remote,
1494 server->config->conn_auth_timeout, 0,
1499 /* Final part of accepting new connection. The connection has now
1500 been authenticated and keys has been exchanged. We also know whether
1501 this is client or server connection. */
1503 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1505 SilcProtocol protocol = (SilcProtocol)context;
1506 SilcServerConnAuthInternalContext *ctx =
1507 (SilcServerConnAuthInternalContext *)protocol->context;
1508 SilcServer server = (SilcServer)ctx->server;
1509 SilcSocketConnection sock = ctx->sock;
1510 SilcServerHBContext hb_context;
1511 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1513 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1515 SILC_LOG_DEBUG(("Start"));
1517 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1518 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1519 /* Error occured during protocol */
1520 silc_protocol_free(protocol);
1521 sock->protocol = NULL;
1523 silc_packet_context_free(ctx->packet);
1525 silc_ske_free(ctx->ske);
1526 silc_free(ctx->dest_id);
1527 silc_server_config_unref(&ctx->cconfig);
1528 silc_server_config_unref(&ctx->sconfig);
1529 silc_server_config_unref(&ctx->rconfig);
1531 silc_schedule_task_del_by_callback(server->schedule,
1532 silc_server_failure_callback);
1533 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1535 server->stat.auth_failures++;
1539 entry->data.last_receive = time(NULL);
1541 switch (ctx->conn_type) {
1542 case SILC_SOCKET_TYPE_CLIENT:
1544 SilcClientEntry client;
1545 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1547 /* Verify whether this connection is after all allowed to connect */
1548 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1549 &server->config->param,
1550 conn->param, ctx->ske)) {
1551 server->stat.auth_failures++;
1555 SILC_LOG_DEBUG(("Remote host is client"));
1556 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1559 /* Add the client to the client ID cache. The nickname and Client ID
1560 and other information is created after we have received NEW_CLIENT
1561 packet from client. */
1562 client = silc_idlist_add_client(server->local_list,
1563 NULL, NULL, NULL, NULL, NULL, sock, 0);
1565 SILC_LOG_ERROR(("Could not add new client to cache"));
1566 silc_free(sock->user_data);
1567 silc_server_disconnect_remote(server, sock,
1568 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1569 server->stat.auth_failures++;
1574 server->stat.my_clients++;
1575 server->stat.clients++;
1576 server->stat.cell_clients++;
1578 /* Get connection parameters */
1580 if (conn->param->keepalive_secs)
1581 hearbeat_timeout = conn->param->keepalive_secs;
1584 id_entry = (void *)client;
1587 case SILC_SOCKET_TYPE_SERVER:
1588 case SILC_SOCKET_TYPE_ROUTER:
1590 SilcServerEntry new_server;
1591 bool initiator = FALSE;
1592 bool backup_local = FALSE;
1593 bool backup_router = FALSE;
1594 char *backup_replace_ip = NULL;
1595 SilcUInt16 backup_replace_port = 0;
1596 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1597 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1599 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1600 /* Verify whether this connection is after all allowed to connect */
1601 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1602 &server->config->param,
1603 rconn ? rconn->param : NULL,
1605 server->stat.auth_failures++;
1611 if (rconn->param->keepalive_secs)
1612 hearbeat_timeout = rconn->param->keepalive_secs;
1615 initiator = rconn->initiator;
1616 backup_local = rconn->backup_local;
1617 backup_router = rconn->backup_router;
1618 backup_replace_ip = rconn->backup_replace_ip;
1619 backup_replace_port = rconn->backup_replace_port;
1623 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1624 /* Verify whether this connection is after all allowed to connect */
1625 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1626 &server->config->param,
1627 sconn ? sconn->param : NULL,
1629 server->stat.auth_failures++;
1634 if (sconn->param->keepalive_secs)
1635 hearbeat_timeout = sconn->param->keepalive_secs;
1638 backup_router = sconn->backup_router;
1642 SILC_LOG_DEBUG(("Remote host is %s",
1643 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1644 "server" : (backup_router ?
1645 "backup router" : "router")));
1646 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1647 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1648 "server" : (backup_router ?
1649 "backup router" : "router")));
1651 /* Add the server into server cache. The server name and Server ID
1652 is updated after we have received NEW_SERVER packet from the
1653 server. We mark ourselves as router for this server if we really
1656 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1657 server->local_list : (backup_router ?
1658 server->local_list :
1659 server->global_list)),
1661 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1662 SILC_SERVER : SILC_ROUTER),
1664 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1665 server->id_entry : (backup_router ?
1666 server->id_entry : NULL)),
1669 SILC_LOG_ERROR(("Could not add new server to cache"));
1670 silc_free(sock->user_data);
1671 silc_server_disconnect_remote(server, sock,
1672 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1673 server->stat.auth_failures++;
1678 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1679 server->stat.my_servers++;
1681 server->stat.my_routers++;
1682 server->stat.routers++;
1684 server->stat.servers++;
1686 id_entry = (void *)new_server;
1688 /* If the incoming connection is router and marked as backup router
1689 then add it to be one of our backups */
1690 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1691 silc_server_backup_add(server, new_server, backup_replace_ip,
1692 backup_replace_port, backup_local);
1694 /* Change it back to SERVER type since that's what it really is. */
1696 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1698 new_server->server_type = SILC_BACKUP_ROUTER;
1701 /* Check whether this connection is to be our primary router connection
1702 if we do not already have the primary route. */
1703 if (!backup_router &&
1704 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1705 if (silc_server_config_is_primary_route(server) && !initiator)
1708 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1709 server->standalone = FALSE;
1710 if (!server->id_entry->router) {
1711 server->id_entry->router = id_entry;
1712 server->router = id_entry;
1723 sock->type = ctx->conn_type;
1725 /* Add the common data structure to the ID entry. */
1726 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1728 /* Add to sockets internal pointer for fast referencing */
1729 silc_free(sock->user_data);
1730 sock->user_data = id_entry;
1732 /* Connection has been fully established now. Everything is ok. */
1733 SILC_LOG_DEBUG(("New connection authenticated"));
1735 /* Perform keepalive. The `hb_context' will be freed automatically
1736 when finally calling the silc_socket_free function. */
1737 hb_context = silc_calloc(1, sizeof(*hb_context));
1738 hb_context->server = server;
1739 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1740 silc_server_perform_heartbeat,
1744 silc_schedule_task_del_by_callback(server->schedule,
1745 silc_server_failure_callback);
1746 silc_protocol_free(protocol);
1748 silc_packet_context_free(ctx->packet);
1750 silc_ske_free(ctx->ske);
1751 silc_free(ctx->dest_id);
1752 silc_server_config_unref(&ctx->cconfig);
1753 silc_server_config_unref(&ctx->sconfig);
1754 silc_server_config_unref(&ctx->rconfig);
1756 sock->protocol = NULL;
1759 /* This function is used to read packets from network and send packets to
1760 network. This is usually a generic task. */
1762 SILC_TASK_CALLBACK(silc_server_packet_process)
1764 SilcServer server = (SilcServer)context;
1765 SilcSocketConnection sock = server->sockets[fd];
1766 SilcIDListData idata;
1767 SilcCipher cipher = NULL;
1768 SilcHmac hmac = NULL;
1769 SilcUInt32 sequence = 0;
1775 SILC_LOG_DEBUG(("Processing packet"));
1777 /* Packet sending */
1779 if (type == SILC_TASK_WRITE) {
1780 /* Do not send data to disconnected connection */
1781 if (SILC_IS_DISCONNECTED(sock))
1784 server->stat.packets_sent++;
1786 /* Send the packet */
1787 ret = silc_packet_send(sock, TRUE);
1789 /* If returned -2 could not write to connection now, will do
1795 SILC_LOG_ERROR(("Error sending packet to connection "
1796 "%s:%d [%s]", sock->hostname, sock->port,
1797 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1798 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1799 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1804 /* The packet has been sent and now it is time to set the connection
1805 back to only for input. When there is again some outgoing data
1806 available for this connection it will be set for output as well.
1807 This call clears the output setting and sets it only for input. */
1808 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1809 SILC_UNSET_OUTBUF_PENDING(sock);
1811 silc_buffer_clear(sock->outbuf);
1815 /* Packet receiving */
1817 /* Read some data from connection */
1818 ret = silc_packet_receive(sock);
1822 SILC_LOG_ERROR(("Error receiving packet from connection "
1823 "%s:%d [%s] %s", sock->hostname, sock->port,
1824 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1825 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1826 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1827 "Router"), strerror(errno)));
1833 SILC_LOG_DEBUG(("Read EOF"));
1835 /* If connection is disconnecting already we will finally
1836 close the connection */
1837 if (SILC_IS_DISCONNECTING(sock)) {
1838 if (sock->user_data)
1839 silc_server_free_sock_user_data(server, sock, NULL);
1840 silc_server_close_connection(server, sock);
1844 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1845 SILC_SET_DISCONNECTING(sock);
1847 if (sock->user_data) {
1849 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1850 silc_server_free_sock_user_data(server, sock, tmp);
1852 silc_server_free_sock_user_data(server, sock, NULL);
1853 } else if (server->router_conn && server->router_conn->sock == sock &&
1854 !server->router && server->standalone)
1855 silc_schedule_task_add(server->schedule, 0,
1856 silc_server_connect_to_router,
1859 SILC_TASK_PRI_NORMAL);
1861 silc_server_close_connection(server, sock);
1865 /* If connection is disconnecting or disconnected we will ignore
1867 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1868 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1872 server->stat.packets_received++;
1874 /* Get keys and stuff from ID entry */
1875 idata = (SilcIDListData)sock->user_data;
1877 cipher = idata->receive_key;
1878 hmac = idata->hmac_receive;
1879 sequence = idata->psn_receive;
1882 /* Process the packet. This will call the parser that will then
1883 decrypt and parse the packet. */
1884 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1885 TRUE : FALSE, cipher, hmac, sequence,
1886 silc_server_packet_parse, server);
1888 /* If this socket connection is not authenticated yet and the packet
1889 processing failed we will drop the connection since it can be
1890 a malicious flooder. */
1891 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1892 (!sock->protocol || sock->protocol->protocol->type ==
1893 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1894 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1895 SILC_SET_DISCONNECTING(sock);
1897 if (sock->user_data)
1898 silc_server_free_sock_user_data(server, sock, NULL);
1899 silc_server_close_connection(server, sock);
1903 /* Parses whole packet, received earlier. */
1905 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1907 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1908 SilcServer server = (SilcServer)parse_ctx->context;
1909 SilcSocketConnection sock = parse_ctx->sock;
1910 SilcPacketContext *packet = parse_ctx->packet;
1911 SilcIDListData idata = (SilcIDListData)sock->user_data;
1914 SILC_LOG_DEBUG(("Start"));
1916 /* Parse the packet */
1917 if (parse_ctx->normal)
1918 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1920 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1922 /* If entry is disabled ignore what we got. */
1923 if (ret != SILC_PACKET_RESUME_ROUTER &&
1924 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1925 SILC_LOG_DEBUG(("Connection is disabled"));
1929 if (ret == SILC_PACKET_NONE)
1932 /* Check that the the current client ID is same as in the client's packet. */
1933 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1934 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1935 if (client && client->id) {
1936 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1937 packet->src_id_type);
1938 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1946 if (server->server_type == SILC_ROUTER) {
1947 /* Route the packet if it is not destined to us. Other ID types but
1948 server are handled separately after processing them. */
1949 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1950 packet->dst_id_type == SILC_ID_SERVER &&
1951 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1952 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1954 /* Route the packet to fastest route for the destination ID */
1955 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1956 packet->dst_id_type);
1959 silc_server_packet_route(server,
1960 silc_server_route_get(server, id,
1961 packet->dst_id_type),
1968 /* Parse the incoming packet type */
1969 silc_server_packet_parse_type(server, sock, packet);
1971 if (server->server_type == SILC_ROUTER) {
1972 /* Broadcast packet if it is marked as broadcast packet and it is
1973 originated from router and we are router. */
1974 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1975 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1976 !server->standalone) {
1977 /* Broadcast to our primary route */
1978 silc_server_packet_broadcast(server, server->router->connection, packet);
1980 /* If we have backup routers then we need to feed all broadcast
1981 data to those servers. */
1982 silc_server_backup_broadcast(server, sock, packet);
1987 silc_packet_context_free(packet);
1988 silc_free(parse_ctx);
1991 /* Parser callback called by silc_packet_receive_process. This merely
1992 registers timeout that will handle the actual parsing when appropriate. */
1994 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1997 SilcServer server = (SilcServer)context;
1998 SilcSocketConnection sock = parser_context->sock;
1999 SilcIDListData idata = (SilcIDListData)sock->user_data;
2002 idata->psn_receive = parser_context->packet->sequence + 1;
2004 /* If protocol for this connection is key exchange or rekey then we'll
2005 process all packets synchronously, since there might be packets in
2006 queue that we are not able to decrypt without first processing the
2007 packets before them. */
2008 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2009 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2010 (sock->protocol && sock->protocol->protocol &&
2011 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2012 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2013 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2016 /* Reprocess data since we'll return FALSE here. This is because
2017 the idata->receive_key might have become valid in the last packet
2018 and we want to call this processor with valid cipher. */
2020 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2021 TRUE : FALSE, idata->receive_key,
2022 idata->hmac_receive, idata->psn_receive,
2023 silc_server_packet_parse, server);
2025 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2026 TRUE : FALSE, NULL, NULL, 0,
2027 silc_server_packet_parse, server);
2031 switch (sock->type) {
2032 case SILC_SOCKET_TYPE_UNKNOWN:
2033 case SILC_SOCKET_TYPE_CLIENT:
2034 /* Parse the packet with timeout */
2035 silc_schedule_task_add(server->schedule, sock->sock,
2036 silc_server_packet_parse_real,
2037 (void *)parser_context, 0, 100000,
2039 SILC_TASK_PRI_NORMAL);
2041 case SILC_SOCKET_TYPE_SERVER:
2042 case SILC_SOCKET_TYPE_ROUTER:
2043 /* Packets from servers are parsed immediately */
2044 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2054 /* Parses the packet type and calls what ever routines the packet type
2055 requires. This is done for all incoming packets. */
2057 void silc_server_packet_parse_type(SilcServer server,
2058 SilcSocketConnection sock,
2059 SilcPacketContext *packet)
2061 SilcPacketType type = packet->type;
2062 SilcIDListData idata = (SilcIDListData)sock->user_data;
2064 SILC_LOG_DEBUG(("Parsing packet type %d", type));
2066 /* Parse the packet type */
2068 case SILC_PACKET_DISCONNECT:
2071 char *message = NULL;
2073 SILC_LOG_DEBUG(("Disconnect packet"));
2075 if (packet->flags & SILC_PACKET_FLAG_LIST)
2077 if (packet->buffer->len < 1)
2080 status = (SilcStatus)packet->buffer->data[0];
2081 if (packet->buffer->len > 1 &&
2082 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2083 message = silc_memdup(packet->buffer->data + 1,
2084 packet->buffer->len - 1);
2086 SILC_LOG_ERROR(("Disconnected by %s (%s): %s (%d) %s",
2087 sock->ip, sock->hostname,
2088 silc_get_status_message(status), status,
2089 message ? message : ""));
2094 case SILC_PACKET_SUCCESS:
2096 * Success received for something. For now we can have only
2097 * one protocol for connection executing at once hence this
2098 * success message is for whatever protocol is executing currently.
2100 SILC_LOG_DEBUG(("Success packet"));
2101 if (packet->flags & SILC_PACKET_FLAG_LIST)
2104 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2107 case SILC_PACKET_FAILURE:
2109 * Failure received for something. For now we can have only
2110 * one protocol for connection executing at once hence this
2111 * failure message is for whatever protocol is executing currently.
2113 SILC_LOG_DEBUG(("Failure packet"));
2114 if (packet->flags & SILC_PACKET_FLAG_LIST)
2116 if (sock->protocol) {
2117 SilcServerFailureContext f;
2118 f = silc_calloc(1, sizeof(*f));
2122 /* We will wait 5 seconds to process this failure packet */
2123 silc_schedule_task_add(server->schedule, sock->sock,
2124 silc_server_failure_callback, (void *)f, 5, 0,
2125 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2129 case SILC_PACKET_REJECT:
2130 SILC_LOG_DEBUG(("Reject packet"));
2131 if (packet->flags & SILC_PACKET_FLAG_LIST)
2136 case SILC_PACKET_NOTIFY:
2138 * Received notify packet. Server can receive notify packets from
2139 * router. Server then relays the notify messages to clients if needed.
2141 SILC_LOG_DEBUG(("Notify packet"));
2142 if (packet->flags & SILC_PACKET_FLAG_LIST)
2143 silc_server_notify_list(server, sock, packet);
2145 silc_server_notify(server, sock, packet);
2151 case SILC_PACKET_CHANNEL_MESSAGE:
2153 * Received channel message. Channel messages are special packets
2154 * (although probably most common ones) thus they are handled
2157 SILC_LOG_DEBUG(("Channel Message packet"));
2158 if (packet->flags & SILC_PACKET_FLAG_LIST)
2160 idata->last_receive = time(NULL);
2161 silc_server_channel_message(server, sock, packet);
2164 case SILC_PACKET_CHANNEL_KEY:
2166 * Received key for channel. As channels are created by the router
2167 * the keys are as well. We will distribute the key to all of our
2168 * locally connected clients on the particular channel. Router
2169 * never receives this channel and thus is ignored.
2171 SILC_LOG_DEBUG(("Channel Key packet"));
2172 if (packet->flags & SILC_PACKET_FLAG_LIST)
2174 silc_server_channel_key(server, sock, packet);
2180 case SILC_PACKET_COMMAND:
2182 * Recived command. Processes the command request and allocates the
2183 * command context and calls the command.
2185 SILC_LOG_DEBUG(("Command packet"));
2186 if (packet->flags & SILC_PACKET_FLAG_LIST)
2188 silc_server_command_process(server, sock, packet);
2191 case SILC_PACKET_COMMAND_REPLY:
2193 * Received command reply packet. Received command reply to command. It
2194 * may be reply to command sent by us or reply to command sent by client
2195 * that we've routed further.
2197 SILC_LOG_DEBUG(("Command Reply packet"));
2198 if (packet->flags & SILC_PACKET_FLAG_LIST)
2200 silc_server_command_reply(server, sock, packet);
2204 * Private Message packets
2206 case SILC_PACKET_PRIVATE_MESSAGE:
2208 * Received private message packet. The packet is coming from either
2211 SILC_LOG_DEBUG(("Private Message packet"));
2212 if (packet->flags & SILC_PACKET_FLAG_LIST)
2214 idata->last_receive = time(NULL);
2215 silc_server_private_message(server, sock, packet);
2218 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2220 * Private message key packet.
2222 if (packet->flags & SILC_PACKET_FLAG_LIST)
2224 silc_server_private_message_key(server, sock, packet);
2228 * Key Exchange protocol packets
2230 case SILC_PACKET_KEY_EXCHANGE:
2231 SILC_LOG_DEBUG(("KE packet"));
2232 if (packet->flags & SILC_PACKET_FLAG_LIST)
2235 if (sock->protocol && sock->protocol->protocol &&
2236 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2237 SilcServerKEInternalContext *proto_ctx =
2238 (SilcServerKEInternalContext *)sock->protocol->context;
2240 proto_ctx->packet = silc_packet_context_dup(packet);
2242 /* Let the protocol handle the packet */
2243 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2245 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2246 "protocol active, packet dropped."));
2250 case SILC_PACKET_KEY_EXCHANGE_1:
2251 SILC_LOG_DEBUG(("KE 1 packet"));
2252 if (packet->flags & SILC_PACKET_FLAG_LIST)
2255 if (sock->protocol && sock->protocol->protocol &&
2256 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2257 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2259 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2260 SilcServerRekeyInternalContext *proto_ctx =
2261 (SilcServerRekeyInternalContext *)sock->protocol->context;
2263 if (proto_ctx->packet)
2264 silc_packet_context_free(proto_ctx->packet);
2266 proto_ctx->packet = silc_packet_context_dup(packet);
2268 /* Let the protocol handle the packet */
2269 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2271 SilcServerKEInternalContext *proto_ctx =
2272 (SilcServerKEInternalContext *)sock->protocol->context;
2274 if (proto_ctx->packet)
2275 silc_packet_context_free(proto_ctx->packet);
2277 proto_ctx->packet = silc_packet_context_dup(packet);
2278 proto_ctx->dest_id_type = packet->src_id_type;
2279 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2280 packet->src_id_type);
2281 if (!proto_ctx->dest_id)
2284 /* Let the protocol handle the packet */
2285 silc_protocol_execute(sock->protocol, server->schedule,
2289 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2290 "protocol active, packet dropped."));
2294 case SILC_PACKET_KEY_EXCHANGE_2:
2295 SILC_LOG_DEBUG(("KE 2 packet"));
2296 if (packet->flags & SILC_PACKET_FLAG_LIST)
2299 if (sock->protocol && sock->protocol->protocol &&
2300 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2301 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2303 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2304 SilcServerRekeyInternalContext *proto_ctx =
2305 (SilcServerRekeyInternalContext *)sock->protocol->context;
2307 if (proto_ctx->packet)
2308 silc_packet_context_free(proto_ctx->packet);
2310 proto_ctx->packet = silc_packet_context_dup(packet);
2312 /* Let the protocol handle the packet */
2313 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2315 SilcServerKEInternalContext *proto_ctx =
2316 (SilcServerKEInternalContext *)sock->protocol->context;
2318 if (proto_ctx->packet)
2319 silc_packet_context_free(proto_ctx->packet);
2321 proto_ctx->packet = silc_packet_context_dup(packet);
2322 proto_ctx->dest_id_type = packet->src_id_type;
2323 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2324 packet->src_id_type);
2325 if (!proto_ctx->dest_id)
2328 /* Let the protocol handle the packet */
2329 silc_protocol_execute(sock->protocol, server->schedule,
2333 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2334 "protocol active, packet dropped."));
2338 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2340 * Connection authentication request packet. When we receive this packet
2341 * we will send to the other end information about our mandatory
2342 * authentication method for the connection. This packet maybe received
2345 SILC_LOG_DEBUG(("Connection authentication request packet"));
2346 if (packet->flags & SILC_PACKET_FLAG_LIST)
2348 silc_server_connection_auth_request(server, sock, packet);
2352 * Connection Authentication protocol packets
2354 case SILC_PACKET_CONNECTION_AUTH:
2355 /* Start of the authentication protocol. We receive here the
2356 authentication data and will verify it. */
2357 SILC_LOG_DEBUG(("Connection auth packet"));
2358 if (packet->flags & SILC_PACKET_FLAG_LIST)
2361 if (sock->protocol && sock->protocol->protocol->type
2362 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2364 SilcServerConnAuthInternalContext *proto_ctx =
2365 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2367 proto_ctx->packet = silc_packet_context_dup(packet);
2369 /* Let the protocol handle the packet */
2370 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2372 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2373 "protocol active, packet dropped."));
2377 case SILC_PACKET_NEW_ID:
2379 * Received New ID packet. This includes some new ID that has been
2380 * created. It may be for client, server or channel. This is the way
2381 * to distribute information about new registered entities in the
2384 SILC_LOG_DEBUG(("New ID packet"));
2385 if (packet->flags & SILC_PACKET_FLAG_LIST)
2386 silc_server_new_id_list(server, sock, packet);
2388 silc_server_new_id(server, sock, packet);
2391 case SILC_PACKET_NEW_CLIENT:
2393 * Received new client packet. This includes client information that
2394 * we will use to create initial client ID. After creating new
2395 * ID we will send it to the client.
2397 SILC_LOG_DEBUG(("New Client packet"));
2398 if (packet->flags & SILC_PACKET_FLAG_LIST)
2400 silc_server_new_client(server, sock, packet);
2403 case SILC_PACKET_NEW_SERVER:
2405 * Received new server packet. This includes Server ID and some other
2406 * information that we may save. This is received after server has
2409 SILC_LOG_DEBUG(("New Server packet"));
2410 if (packet->flags & SILC_PACKET_FLAG_LIST)
2412 silc_server_new_server(server, sock, packet);
2415 case SILC_PACKET_NEW_CHANNEL:
2417 * Received new channel packet. Information about new channel in the
2418 * network are distributed using this packet.
2420 SILC_LOG_DEBUG(("New Channel packet"));
2421 if (packet->flags & SILC_PACKET_FLAG_LIST)
2422 silc_server_new_channel_list(server, sock, packet);
2424 silc_server_new_channel(server, sock, packet);
2427 case SILC_PACKET_HEARTBEAT:
2429 * Received heartbeat.
2431 SILC_LOG_DEBUG(("Heartbeat packet"));
2432 if (packet->flags & SILC_PACKET_FLAG_LIST)
2436 case SILC_PACKET_KEY_AGREEMENT:
2438 * Received heartbeat.
2440 SILC_LOG_DEBUG(("Key agreement packet"));
2441 if (packet->flags & SILC_PACKET_FLAG_LIST)
2443 silc_server_key_agreement(server, sock, packet);
2446 case SILC_PACKET_REKEY:
2448 * Received re-key packet. The sender wants to regenerate the session
2451 SILC_LOG_DEBUG(("Re-key packet"));
2452 if (packet->flags & SILC_PACKET_FLAG_LIST)
2454 silc_server_rekey(server, sock, packet);
2457 case SILC_PACKET_REKEY_DONE:
2459 * The re-key is done.
2461 SILC_LOG_DEBUG(("Re-key done packet"));
2462 if (packet->flags & SILC_PACKET_FLAG_LIST)
2465 if (sock->protocol && sock->protocol->protocol &&
2466 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2468 SilcServerRekeyInternalContext *proto_ctx =
2469 (SilcServerRekeyInternalContext *)sock->protocol->context;
2471 if (proto_ctx->packet)
2472 silc_packet_context_free(proto_ctx->packet);
2474 proto_ctx->packet = silc_packet_context_dup(packet);
2476 /* Let the protocol handle the packet */
2477 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2479 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2480 "protocol active, packet dropped."));
2484 case SILC_PACKET_FTP:
2486 SILC_LOG_DEBUG(("FTP packet"));
2487 if (packet->flags & SILC_PACKET_FLAG_LIST)
2489 silc_server_ftp(server, sock, packet);
2492 case SILC_PACKET_RESUME_CLIENT:
2494 SILC_LOG_DEBUG(("Resume Client packet"));
2495 if (packet->flags & SILC_PACKET_FLAG_LIST)
2497 silc_server_resume_client(server, sock, packet);
2500 case SILC_PACKET_RESUME_ROUTER:
2501 /* Resume router packet received. This packet is received for backup
2502 router resuming protocol. */
2503 SILC_LOG_DEBUG(("Resume router packet"));
2504 if (packet->flags & SILC_PACKET_FLAG_LIST)
2506 silc_server_backup_resume_router(server, sock, packet);
2510 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2516 /* Creates connection to a remote router. */
2518 void silc_server_create_connection(SilcServer server,
2519 const char *remote_host, SilcUInt32 port)
2521 SilcServerConnection sconn;
2523 /* Allocate connection object for hold connection specific stuff. */
2524 sconn = silc_calloc(1, sizeof(*sconn));
2525 sconn->server = server;
2526 sconn->remote_host = strdup(remote_host);
2527 sconn->remote_port = port;
2528 sconn->no_reconnect = TRUE;
2530 silc_schedule_task_add(server->schedule, 0,
2531 silc_server_connect_router,
2532 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2533 SILC_TASK_PRI_NORMAL);
2536 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2538 silc_socket_free((SilcSocketConnection)context);
2541 /* Closes connection to socket connection */
2543 void silc_server_close_connection(SilcServer server,
2544 SilcSocketConnection sock)
2546 if (!server->sockets[sock->sock])
2549 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2551 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2552 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2553 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2556 /* We won't listen for this connection anymore */
2557 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2559 /* Unregister all tasks */
2560 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2562 /* Close the actual connection */
2563 silc_net_close_connection(sock->sock);
2564 server->sockets[sock->sock] = NULL;
2566 /* If sock->user_data is NULL then we'll check for active protocols
2567 here since the silc_server_free_sock_user_data has not been called
2568 for this connection. */
2569 if (!sock->user_data) {
2570 /* If any protocol is active cancel its execution. It will call
2571 the final callback which will finalize the disconnection. */
2572 if (sock->protocol) {
2573 silc_protocol_cancel(sock->protocol, server->schedule);
2574 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2575 silc_protocol_execute_final(sock->protocol, server->schedule);
2576 sock->protocol = NULL;
2581 silc_schedule_task_add(server->schedule, 0,
2582 silc_server_close_connection_final,
2583 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2584 SILC_TASK_PRI_NORMAL);
2587 /* Sends disconnect message to remote connection and disconnects the
2590 void silc_server_disconnect_remote(SilcServer server,
2591 SilcSocketConnection sock,
2592 SilcStatus status, ...)
2595 unsigned char buf[512];
2603 memset(buf, 0, sizeof(buf));
2604 va_start(ap, status);
2605 cp = va_arg(ap, char *);
2607 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2612 SILC_LOG_DEBUG(("Disconnecting remote host"));
2614 /* Notify remote end that the conversation is over. The notify message
2615 is tried to be sent immediately. */
2619 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2621 buffer = silc_buffer_alloc_size(len);
2625 buffer->data[0] = status;
2627 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2629 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2630 buffer->data, buffer->len, TRUE);
2631 silc_buffer_free(buffer);
2634 silc_server_packet_queue_purge(server, sock);
2636 /* Mark the connection to be disconnected */
2637 SILC_SET_DISCONNECTED(sock);
2638 silc_server_close_connection(server, sock);
2643 SilcClientEntry client;
2644 } *FreeClientInternal;
2646 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2648 FreeClientInternal i = (FreeClientInternal)context;
2650 silc_idlist_del_data(i->client);
2651 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2655 /* Frees client data and notifies about client's signoff. */
2657 void silc_server_free_client_data(SilcServer server,
2658 SilcSocketConnection sock,
2659 SilcClientEntry client,
2661 const char *signoff)
2663 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2665 /* If there is pending outgoing data for the client then purge it
2666 to the network before removing the client entry. */
2667 silc_server_packet_queue_purge(server, sock);
2670 /* Check if anyone is watching this nickname */
2671 if (server->server_type == SILC_ROUTER)
2672 silc_server_check_watcher_list(server, client, NULL,
2673 SILC_NOTIFY_TYPE_SIGNOFF);
2675 /* Send SIGNOFF notify to routers. */
2676 if (notify && !server->standalone && server->router)
2677 silc_server_send_notify_signoff(server, server->router->connection,
2678 server->server_type == SILC_SERVER ?
2679 FALSE : TRUE, client->id, signoff);
2681 /* Remove client from all channels */
2683 silc_server_remove_from_channels(server, NULL, client,
2684 TRUE, (char *)signoff, TRUE);
2686 silc_server_remove_from_channels(server, NULL, client,
2687 FALSE, NULL, FALSE);
2689 /* Remove this client from watcher list if it is */
2690 silc_server_del_from_watcher_list(server, client);
2693 /* Update statistics */
2694 server->stat.my_clients--;
2695 server->stat.clients--;
2696 if (server->stat.cell_clients)
2697 server->stat.cell_clients--;
2698 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2699 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2700 silc_schedule_task_del_by_context(server->schedule, client);
2702 /* We will not delete the client entry right away. We will take it
2703 into history (for WHOWAS command) for 5 minutes */
2706 silc_schedule_task_add(server->schedule, 0,
2707 silc_server_free_client_data_timeout,
2709 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2710 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2712 client->router = NULL;
2713 client->connection = NULL;
2716 /* Frees user_data pointer from socket connection object. This also sends
2717 appropriate notify packets to the network to inform about leaving
2720 void silc_server_free_sock_user_data(SilcServer server,
2721 SilcSocketConnection sock,
2722 const char *signoff_message)
2724 SILC_LOG_DEBUG(("Start"));
2726 switch (sock->type) {
2727 case SILC_SOCKET_TYPE_CLIENT:
2729 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2730 silc_server_free_client_data(server, sock, user_data, TRUE,
2734 case SILC_SOCKET_TYPE_SERVER:
2735 case SILC_SOCKET_TYPE_ROUTER:
2737 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2738 SilcServerEntry backup_router = NULL;
2741 backup_router = silc_server_backup_get(server, user_data->id);
2743 /* If this was our primary router connection then we're lost to
2744 the outside world. */
2745 if (server->router == user_data) {
2746 /* Check whether we have a backup router connection */
2747 if (!backup_router || backup_router == user_data) {
2748 silc_schedule_task_add(server->schedule, 0,
2749 silc_server_connect_to_router,
2752 SILC_TASK_PRI_NORMAL);
2754 server->id_entry->router = NULL;
2755 server->router = NULL;
2756 server->standalone = TRUE;
2757 backup_router = NULL;
2759 SILC_LOG_INFO(("New primary router is backup router %s",
2760 backup_router->server_name));
2761 SILC_LOG_DEBUG(("New primary router is backup router %s",
2762 backup_router->server_name));
2763 #ifdef BACKUP_SINGLE_ROUTER
2764 if (server->id_entry != backup_router) {
2765 #endif /* BACKUP_SINGLE_ROUTER */
2766 server->id_entry->router = backup_router;
2767 server->router = backup_router;
2768 server->router_connect = time(0);
2769 server->backup_primary = TRUE;
2770 #ifdef BACKUP_SINGLE_ROUTER
2772 server->id_entry->router = NULL;
2773 server->router = NULL;
2774 server->standalone = TRUE;
2776 #endif /* BACKUP_SINGLE_ROUTER */
2778 if (server->server_type == SILC_BACKUP_ROUTER) {
2779 server->server_type = SILC_ROUTER;
2781 /* We'll need to constantly try to reconnect to the primary
2782 router so that we'll see when it comes back online. */
2783 silc_server_backup_reconnect(server, sock->ip, sock->port,
2784 silc_server_backup_connected,
2788 /* Mark this connection as replaced */
2789 silc_server_backup_replaced_add(server, user_data->id,
2792 } else if (backup_router) {
2793 SILC_LOG_INFO(("Enabling the use of backup router %s",
2794 backup_router->server_name));
2795 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2796 backup_router->server_name));
2798 /* Mark this connection as replaced */
2799 silc_server_backup_replaced_add(server, user_data->id,
2803 if (!backup_router) {
2804 /* Free all client entries that this server owns as they will
2805 become invalid now as well. */
2807 silc_server_remove_clients_by_server(server, user_data, TRUE);
2808 if (server->server_type == SILC_SERVER)
2809 silc_server_remove_channels_by_server(server, user_data);
2811 /* Update the client entries of this server to the new backup
2812 router. This also removes the clients that *really* was owned
2813 by the primary router and went down with the router. */
2814 silc_server_update_clients_by_server(server, user_data, backup_router,
2816 silc_server_update_servers_by_server(server, user_data, backup_router);
2817 if (server->server_type == SILC_SERVER)
2818 silc_server_update_channels_by_server(server, user_data,
2822 /* Free the server entry */
2823 silc_server_backup_del(server, user_data);
2824 silc_server_backup_replaced_del(server, user_data);
2825 silc_idlist_del_data(user_data);
2826 if (!silc_idlist_del_server(server->local_list, user_data))
2827 silc_idlist_del_server(server->global_list, user_data);
2828 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
2829 server->stat.my_servers--;
2831 server->stat.my_routers--;
2832 server->stat.routers--;
2834 server->stat.servers--;
2835 if (server->server_type == SILC_ROUTER)
2836 server->stat.cell_servers--;
2838 if (backup_router) {
2839 /* Announce all of our stuff that was created about 5 minutes ago.
2840 The backup router knows all the other stuff already. */
2841 if (server->server_type == SILC_ROUTER)
2842 silc_server_announce_servers(server, FALSE, time(0) - 300,
2843 backup_router->connection);
2845 /* Announce our clients and channels to the router */
2846 silc_server_announce_clients(server, time(0) - 300,
2847 backup_router->connection);
2848 silc_server_announce_channels(server, time(0) - 300,
2849 backup_router->connection);
2855 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2857 silc_idlist_del_data(user_data);
2858 silc_free(user_data);
2863 /* If any protocol is active cancel its execution */
2864 if (sock->protocol) {
2865 silc_protocol_cancel(sock->protocol, server->schedule);
2866 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2867 silc_protocol_execute_final(sock->protocol, server->schedule);
2868 sock->protocol = NULL;
2871 sock->user_data = NULL;
2874 /* Removes client from all channels it has joined. This is used when client
2875 connection is disconnected. If the client on a channel is last, the
2876 channel is removed as well. This sends the SIGNOFF notify types. */
2878 void silc_server_remove_from_channels(SilcServer server,
2879 SilcSocketConnection sock,
2880 SilcClientEntry client,
2882 const char *signoff_message,
2885 SilcChannelEntry channel;
2886 SilcChannelClientEntry chl;
2887 SilcHashTableList htl;
2890 SILC_LOG_DEBUG(("Start"));
2892 if (!client || !client->id)
2895 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2899 /* Remove the client from all channels. The client is removed from
2900 the channels' user list. */
2901 silc_hash_table_list(client->channels, &htl);
2902 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2903 channel = chl->channel;
2905 /* Remove channel if this is last client leaving the channel, unless
2906 the channel is permanent. */
2907 if (server->server_type == SILC_ROUTER &&
2908 silc_hash_table_count(channel->user_list) < 2) {
2909 silc_server_channel_delete(server, channel);
2913 silc_hash_table_del(client->channels, channel);
2914 silc_hash_table_del(channel->user_list, chl->client);
2915 channel->user_count--;
2917 /* If there is no global users on the channel anymore mark the channel
2918 as local channel. Do not check if the removed client is local client. */
2919 if (server->server_type != SILC_ROUTER && channel->global_users &&
2920 chl->client->router && !silc_server_channel_has_global(channel))
2921 channel->global_users = FALSE;
2925 /* Update statistics */
2926 if (client->connection)
2927 server->stat.my_chanclients--;
2928 if (server->server_type == SILC_ROUTER) {
2929 server->stat.cell_chanclients--;
2930 server->stat.chanclients--;
2933 /* If there is not at least one local user on the channel then we don't
2934 need the channel entry anymore, we can remove it safely, unless the
2935 channel is permanent channel */
2936 if (server->server_type != SILC_ROUTER &&
2937 !silc_server_channel_has_local(channel)) {
2938 /* Notify about leaving client if this channel has global users. */
2939 if (notify && channel->global_users)
2940 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2941 SILC_NOTIFY_TYPE_SIGNOFF,
2942 signoff_message ? 2 : 1,
2943 clidp->data, clidp->len,
2944 signoff_message, signoff_message ?
2945 strlen(signoff_message) : 0);
2947 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2948 silc_server_channel_delete(server, channel);
2952 /* Send notify to channel about client leaving SILC and channel too */
2954 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2955 SILC_NOTIFY_TYPE_SIGNOFF,
2956 signoff_message ? 2 : 1,
2957 clidp->data, clidp->len,
2958 signoff_message, signoff_message ?
2959 strlen(signoff_message) : 0);
2961 /* Re-generate channel key if needed */
2962 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2963 if (!silc_server_create_channel_key(server, channel, 0))
2966 /* Send the channel key to the channel. The key of course is not sent
2967 to the client who was removed from the channel. */
2968 silc_server_send_channel_key(server, client->connection, channel,
2969 server->server_type == SILC_ROUTER ?
2970 FALSE : !server->standalone);
2974 silc_hash_table_list_reset(&htl);
2975 silc_buffer_free(clidp);
2978 /* Removes client from one channel. This is used for example when client
2979 calls LEAVE command to remove itself from the channel. Returns TRUE
2980 if channel still exists and FALSE if the channel is removed when
2981 last client leaves the channel. If `notify' is FALSE notify messages
2984 bool silc_server_remove_from_one_channel(SilcServer server,
2985 SilcSocketConnection sock,
2986 SilcChannelEntry channel,
2987 SilcClientEntry client,
2990 SilcChannelClientEntry chl;
2993 SILC_LOG_DEBUG(("Removing %s from channel %s",
2994 silc_id_render(client->id, SILC_ID_CLIENT),
2995 channel->channel_name));
2997 /* Get the entry to the channel, if this client is not on the channel
2999 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3002 /* Remove channel if this is last client leaving the channel, unless
3003 the channel is permanent. */
3004 if (server->server_type == SILC_ROUTER &&
3005 silc_hash_table_count(channel->user_list) < 2) {
3006 silc_server_channel_delete(server, channel);
3010 silc_hash_table_del(client->channels, chl->channel);
3011 silc_hash_table_del(channel->user_list, chl->client);
3012 channel->user_count--;
3014 /* If there is no global users on the channel anymore mark the channel
3015 as local channel. Do not check if the client is local client. */
3016 if (server->server_type != SILC_ROUTER && channel->global_users &&
3017 chl->client->router && !silc_server_channel_has_global(channel))
3018 channel->global_users = FALSE;
3022 /* Update statistics */
3023 if (client->connection)
3024 server->stat.my_chanclients--;
3025 if (server->server_type == SILC_ROUTER) {
3026 server->stat.cell_chanclients--;
3027 server->stat.chanclients--;
3030 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3034 /* If there is not at least one local user on the channel then we don't
3035 need the channel entry anymore, we can remove it safely, unless the
3036 channel is permanent channel */
3037 if (server->server_type != SILC_ROUTER &&
3038 !silc_server_channel_has_local(channel)) {
3039 /* Notify about leaving client if this channel has global users. */
3040 if (notify && channel->global_users)
3041 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3042 SILC_NOTIFY_TYPE_LEAVE, 1,
3043 clidp->data, clidp->len);
3045 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3046 silc_server_channel_delete(server, channel);
3047 silc_buffer_free(clidp);
3051 /* Send notify to channel about client leaving the channel */
3053 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3054 SILC_NOTIFY_TYPE_LEAVE, 1,
3055 clidp->data, clidp->len);
3057 silc_buffer_free(clidp);
3061 /* Timeout callback. This is called if connection is idle or for some
3062 other reason is not responding within some period of time. This
3063 disconnects the remote end. */
3065 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3067 SilcServer server = (SilcServer)context;
3068 SilcSocketConnection sock = server->sockets[fd];
3069 SilcProtocolType protocol = 0;
3071 SILC_LOG_DEBUG(("Start"));
3076 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3077 sock->hostname, sock->ip));
3079 /* If we have protocol active we must assure that we call the protocol's
3080 final callback so that all the memory is freed. */
3081 if (sock->protocol) {
3082 protocol = sock->protocol->protocol->type;
3083 silc_protocol_cancel(sock->protocol, server->schedule);
3084 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3085 silc_protocol_execute_final(sock->protocol, server->schedule);
3086 sock->protocol = NULL;
3090 if (sock->user_data)
3091 silc_server_free_sock_user_data(server, sock, NULL);
3093 silc_server_disconnect_remote(server, sock,
3095 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3096 SILC_STATUS_ERR_AUTH_FAILED :
3097 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3098 "Connection timeout");
3101 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3102 function may be used only by router. In real SILC network all channels
3103 are created by routers thus this function is never used by normal
3106 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3107 SilcServerID *router_id,
3113 SilcChannelID *channel_id;
3114 SilcChannelEntry entry;
3118 SILC_LOG_DEBUG(("Creating new channel"));
3121 cipher = SILC_DEFAULT_CIPHER;
3123 hmac = SILC_DEFAULT_HMAC;
3125 /* Allocate cipher */
3126 if (!silc_cipher_alloc(cipher, &key))
3130 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3131 silc_cipher_free(key);
3135 channel_name = strdup(channel_name);
3137 /* Create the channel ID */
3138 if (!silc_id_create_channel_id(server, router_id, server->rng,
3140 silc_free(channel_name);
3141 silc_cipher_free(key);
3142 silc_hmac_free(newhmac);
3146 /* Create the channel */
3147 entry = silc_idlist_add_channel(server->local_list, channel_name,
3148 SILC_CHANNEL_MODE_NONE, channel_id,
3149 NULL, key, newhmac, 0);
3151 silc_free(channel_name);
3152 silc_cipher_free(key);
3153 silc_hmac_free(newhmac);
3154 silc_free(channel_id);
3158 entry->cipher = strdup(cipher);
3159 entry->hmac_name = strdup(hmac);
3161 /* Now create the actual key material */
3162 if (!silc_server_create_channel_key(server, entry,
3163 silc_cipher_get_key_len(key) / 8)) {
3164 silc_idlist_del_channel(server->local_list, entry);
3168 /* Notify other routers about the new channel. We send the packet
3169 to our primary route. */
3170 if (broadcast && server->standalone == FALSE)
3171 silc_server_send_new_channel(server, server->router->connection, TRUE,
3172 channel_name, entry->id,
3173 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3176 /* Distribute to backup routers */
3177 if (broadcast && server->server_type == SILC_ROUTER) {
3180 SilcUInt32 name_len = strlen(channel_name);
3181 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3182 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3184 packet = silc_channel_payload_encode(channel_name, name_len,
3185 cid, channel_id_len, entry->mode);
3186 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3187 packet->data, packet->len, FALSE, TRUE);
3189 silc_buffer_free(packet);
3192 server->stat.my_channels++;
3193 if (server->server_type == SILC_ROUTER) {
3194 server->stat.channels++;
3195 server->stat.cell_channels++;
3196 entry->users_resolved = TRUE;
3202 /* Same as above but creates the channel with Channel ID `channel_id. */
3205 silc_server_create_new_channel_with_id(SilcServer server,
3209 SilcChannelID *channel_id,
3212 SilcChannelEntry entry;
3216 SILC_LOG_DEBUG(("Creating new channel"));
3219 cipher = SILC_DEFAULT_CIPHER;
3221 hmac = SILC_DEFAULT_HMAC;
3223 /* Allocate cipher */
3224 if (!silc_cipher_alloc(cipher, &key))
3228 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3229 silc_cipher_free(key);
3233 channel_name = strdup(channel_name);
3235 /* Create the channel */
3236 entry = silc_idlist_add_channel(server->local_list, channel_name,
3237 SILC_CHANNEL_MODE_NONE, channel_id,
3238 NULL, key, newhmac, 0);
3240 silc_cipher_free(key);
3241 silc_hmac_free(newhmac);
3242 silc_free(channel_name);
3246 /* Now create the actual key material */
3247 if (!silc_server_create_channel_key(server, entry,
3248 silc_cipher_get_key_len(key) / 8)) {
3249 silc_idlist_del_channel(server->local_list, entry);
3253 /* Notify other routers about the new channel. We send the packet
3254 to our primary route. */
3255 if (broadcast && server->standalone == FALSE)
3256 silc_server_send_new_channel(server, server->router->connection, TRUE,
3257 channel_name, entry->id,
3258 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3261 /* Distribute to backup routers */
3262 if (broadcast && server->server_type == SILC_ROUTER) {
3265 SilcUInt32 name_len = strlen(channel_name);
3266 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3267 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3269 packet = silc_channel_payload_encode(channel_name, name_len,
3270 cid, channel_id_len, entry->mode);
3271 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3272 packet->data, packet->len, FALSE, TRUE);
3274 silc_buffer_free(packet);
3277 server->stat.my_channels++;
3278 if (server->server_type == SILC_ROUTER) {
3279 server->stat.channels++;
3280 server->stat.cell_channels++;
3281 entry->users_resolved = TRUE;
3287 /* Channel's key re-key timeout callback. */
3289 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3291 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3292 SilcServer server = (SilcServer)rekey->context;
3296 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3299 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3302 /* Generates new channel key. This is used to create the initial channel key
3303 but also to re-generate new key for channel. If `key_len' is provided
3304 it is the bytes of the key length. */
3306 bool silc_server_create_channel_key(SilcServer server,
3307 SilcChannelEntry channel,
3311 unsigned char channel_key[32], hash[32];
3314 SILC_LOG_DEBUG(("Generating channel key"));
3316 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3317 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3321 if (!channel->channel_key)
3322 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3323 channel->channel_key = NULL;
3329 else if (channel->key_len)
3330 len = channel->key_len / 8;
3332 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3334 /* Create channel key */
3335 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3338 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3340 /* Remove old key if exists */
3342 memset(channel->key, 0, channel->key_len / 8);
3343 silc_free(channel->key);
3347 channel->key_len = len * 8;
3348 channel->key = silc_memdup(channel_key, len);
3349 memset(channel_key, 0, sizeof(channel_key));
3351 /* Generate HMAC key from the channel key data and set it */
3353 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3354 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3355 silc_hmac_set_key(channel->hmac, hash,
3356 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3357 memset(hash, 0, sizeof(hash));
3359 if (server->server_type == SILC_ROUTER) {
3360 if (!channel->rekey)
3361 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3362 channel->rekey->context = (void *)server;
3363 channel->rekey->channel = channel;
3364 channel->rekey->key_len = key_len;
3365 if (channel->rekey->task)
3366 silc_schedule_task_del(server->schedule, channel->rekey->task);
3368 channel->rekey->task =
3369 silc_schedule_task_add(server->schedule, 0,
3370 silc_server_channel_key_rekey,
3371 (void *)channel->rekey,
3372 server->config->channel_rekey_secs, 0,
3374 SILC_TASK_PRI_NORMAL);
3380 /* Saves the channel key found in the encoded `key_payload' buffer. This
3381 function is used when we receive Channel Key Payload and also when we're
3382 processing JOIN command reply. Returns entry to the channel. */
3384 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3385 SilcBuffer key_payload,
3386 SilcChannelEntry channel)
3388 SilcChannelKeyPayload payload = NULL;
3389 SilcChannelID *id = NULL;
3390 unsigned char *tmp, hash[32];
3394 SILC_LOG_DEBUG(("Start"));
3396 /* Decode channel key payload */
3397 payload = silc_channel_key_payload_parse(key_payload->data,
3400 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3405 /* Get the channel entry */
3408 /* Get channel ID */
3409 tmp = silc_channel_key_get_id(payload, &tmp_len);
3410 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3416 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3418 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3420 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3421 silc_id_render(id, SILC_ID_CHANNEL)));
3427 tmp = silc_channel_key_get_key(payload, &tmp_len);
3433 cipher = silc_channel_key_get_cipher(payload, NULL);
3439 /* Remove old key if exists */
3441 memset(channel->key, 0, channel->key_len / 8);
3442 silc_free(channel->key);
3443 silc_cipher_free(channel->channel_key);
3446 /* Create new cipher */
3447 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3448 channel->channel_key = NULL;
3453 if (channel->cipher)
3454 silc_free(channel->cipher);
3455 channel->cipher = strdup(cipher);
3458 channel->key_len = tmp_len * 8;
3459 channel->key = silc_memdup(tmp, tmp_len);
3460 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3462 /* Generate HMAC key from the channel key data and set it */
3464 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3465 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3466 silc_hmac_set_key(channel->hmac, hash,
3467 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3469 memset(hash, 0, sizeof(hash));
3470 memset(tmp, 0, tmp_len);
3472 if (server->server_type == SILC_ROUTER) {
3473 if (!channel->rekey)
3474 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3475 channel->rekey->context = (void *)server;
3476 channel->rekey->channel = channel;
3477 if (channel->rekey->task)
3478 silc_schedule_task_del(server->schedule, channel->rekey->task);
3480 channel->rekey->task =
3481 silc_schedule_task_add(server->schedule, 0,
3482 silc_server_channel_key_rekey,
3483 (void *)channel->rekey,
3484 server->config->channel_rekey_secs, 0,
3486 SILC_TASK_PRI_NORMAL);
3492 silc_channel_key_payload_free(payload);
3497 /* Heartbeat callback. This function is set as argument for the
3498 silc_socket_set_heartbeat function. The library will call this function
3499 at the set time interval. */
3501 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3504 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3506 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3508 /* Send the heartbeat */
3509 silc_server_send_heartbeat(hb->server, sock);
3512 /* Returns assembled of all servers in the given ID list. The packet's
3513 form is dictated by the New ID payload. */
3515 static void silc_server_announce_get_servers(SilcServer server,
3516 SilcServerEntry remote,
3518 SilcBuffer *servers,
3519 unsigned long creation_time)
3521 SilcIDCacheList list;
3522 SilcIDCacheEntry id_cache;
3523 SilcServerEntry entry;
3526 /* Go through all clients in the list */
3527 if (silc_idcache_get_all(id_list->servers, &list)) {
3528 if (silc_idcache_list_first(list, &id_cache)) {
3530 entry = (SilcServerEntry)id_cache->context;
3532 /* Do not announce the one we've sending our announcements and
3533 do not announce ourself. Also check the creation time if it's
3535 if ((entry == remote) || (entry == server->id_entry) ||
3536 (creation_time && entry->data.created < creation_time)) {
3537 if (!silc_idcache_list_next(list, &id_cache))
3542 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3544 *servers = silc_buffer_realloc(*servers,
3546 (*servers)->truelen + idp->len :
3548 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3549 silc_buffer_put(*servers, idp->data, idp->len);
3550 silc_buffer_pull(*servers, idp->len);
3551 silc_buffer_free(idp);
3553 if (!silc_idcache_list_next(list, &id_cache))
3558 silc_idcache_list_free(list);
3563 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3569 p = silc_notify_payload_encode(notify, argc, ap);
3575 /* This function is used by router to announce existing servers to our
3576 primary router when we've connected to it. If `creation_time' is non-zero
3577 then only the servers that has been created after the `creation_time'
3578 will be announced. */
3580 void silc_server_announce_servers(SilcServer server, bool global,
3581 unsigned long creation_time,
3582 SilcSocketConnection remote)
3584 SilcBuffer servers = NULL;
3586 SILC_LOG_DEBUG(("Announcing servers"));
3588 /* Get servers in local list */
3589 silc_server_announce_get_servers(server, remote->user_data,
3590 server->local_list, &servers,
3594 /* Get servers in global list */
3595 silc_server_announce_get_servers(server, remote->user_data,
3596 server->global_list, &servers,
3600 silc_buffer_push(servers, servers->data - servers->head);
3601 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3603 /* Send the packet */
3604 silc_server_packet_send(server, remote,
3605 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3606 servers->data, servers->len, TRUE);
3608 silc_buffer_free(servers);
3612 /* Returns assembled packet of all clients in the given ID list. The
3613 packet's form is dictated by the New ID Payload. */
3615 static void silc_server_announce_get_clients(SilcServer server,
3617 SilcBuffer *clients,
3619 unsigned long creation_time)
3621 SilcIDCacheList list;
3622 SilcIDCacheEntry id_cache;
3623 SilcClientEntry client;
3626 unsigned char mode[4];
3628 /* Go through all clients in the list */
3629 if (silc_idcache_get_all(id_list->clients, &list)) {
3630 if (silc_idcache_list_first(list, &id_cache)) {
3632 client = (SilcClientEntry)id_cache->context;
3634 if (creation_time && client->data.created < creation_time) {
3635 if (!silc_idcache_list_next(list, &id_cache))
3640 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3642 *clients = silc_buffer_realloc(*clients,
3644 (*clients)->truelen + idp->len :
3646 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3647 silc_buffer_put(*clients, idp->data, idp->len);
3648 silc_buffer_pull(*clients, idp->len);
3650 SILC_PUT32_MSB(client->mode, mode);
3651 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3652 2, idp->data, idp->len,
3654 *umodes = silc_buffer_realloc(*umodes,
3656 (*umodes)->truelen + tmp->len :
3658 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3659 silc_buffer_put(*umodes, tmp->data, tmp->len);
3660 silc_buffer_pull(*umodes, tmp->len);
3661 silc_buffer_free(tmp);
3663 silc_buffer_free(idp);
3665 if (!silc_idcache_list_next(list, &id_cache))
3670 silc_idcache_list_free(list);
3674 /* This function is used to announce our existing clients to our router
3675 when we've connected to it. If `creation_time' is non-zero then only
3676 the clients that has been created after the `creation_time' will be
3679 void silc_server_announce_clients(SilcServer server,
3680 unsigned long creation_time,
3681 SilcSocketConnection remote)
3683 SilcBuffer clients = NULL;
3684 SilcBuffer umodes = NULL;
3686 SILC_LOG_DEBUG(("Announcing clients"));
3688 /* Get clients in local list */
3689 silc_server_announce_get_clients(server, server->local_list,
3690 &clients, &umodes, creation_time);
3692 /* As router we announce our global list as well */
3693 if (server->server_type == SILC_ROUTER)
3694 silc_server_announce_get_clients(server, server->global_list,
3695 &clients, &umodes, creation_time);
3698 silc_buffer_push(clients, clients->data - clients->head);
3699 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3701 /* Send the packet */
3702 silc_server_packet_send(server, remote,
3703 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3704 clients->data, clients->len, TRUE);
3706 silc_buffer_free(clients);
3710 silc_buffer_push(umodes, umodes->data - umodes->head);
3711 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3713 /* Send the packet */
3714 silc_server_packet_send(server, remote,
3715 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3716 umodes->data, umodes->len, TRUE);
3718 silc_buffer_free(umodes);
3722 /* Returns channel's topic for announcing it */
3724 void silc_server_announce_get_channel_topic(SilcServer server,
3725 SilcChannelEntry channel,
3730 if (channel->topic) {
3731 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3732 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3733 chidp->data, chidp->len,
3735 strlen(channel->topic));
3736 silc_buffer_free(chidp);
3740 /* Returns assembled packets for channel users of the `channel'. */
3742 void silc_server_announce_get_channel_users(SilcServer server,
3743 SilcChannelEntry channel,
3744 SilcBuffer *channel_modes,
3745 SilcBuffer *channel_users,
3746 SilcBuffer *channel_users_modes)
3748 SilcChannelClientEntry chl;
3749 SilcHashTableList htl;
3750 SilcBuffer chidp, clidp, csidp;
3753 unsigned char mode[4], *fkey = NULL;
3754 SilcUInt32 fkey_len = 0;
3757 SILC_LOG_DEBUG(("Start"));
3759 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3760 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
3763 SILC_PUT32_MSB(channel->mode, mode);
3764 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
3765 if (channel->founder_key)
3766 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3768 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
3769 6, csidp->data, csidp->len,
3772 hmac, hmac ? strlen(hmac) : 0,
3773 channel->passphrase,
3774 channel->passphrase ?
3775 strlen(channel->passphrase) : 0,
3779 silc_buffer_realloc(*channel_modes,
3781 (*channel_modes)->truelen + len : len));
3782 silc_buffer_pull_tail(*channel_modes,
3783 ((*channel_modes)->end -
3784 (*channel_modes)->data));
3785 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
3786 silc_buffer_pull(*channel_modes, len);
3787 silc_buffer_free(tmp);
3792 /* Now find all users on the channel */
3793 silc_hash_table_list(channel->user_list, &htl);
3794 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3795 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3798 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3799 clidp->data, clidp->len,
3800 chidp->data, chidp->len);
3803 silc_buffer_realloc(*channel_users,
3805 (*channel_users)->truelen + len : len));
3806 silc_buffer_pull_tail(*channel_users,
3807 ((*channel_users)->end -
3808 (*channel_users)->data));
3810 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3811 silc_buffer_pull(*channel_users, len);
3812 silc_buffer_free(tmp);
3814 /* CUMODE notify for mode change on the channel */
3815 SILC_PUT32_MSB(chl->mode, mode);
3816 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
3817 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3818 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3819 4, csidp->data, csidp->len,
3821 clidp->data, clidp->len,
3824 *channel_users_modes =
3825 silc_buffer_realloc(*channel_users_modes,
3826 (*channel_users_modes ?
3827 (*channel_users_modes)->truelen + len : len));
3828 silc_buffer_pull_tail(*channel_users_modes,
3829 ((*channel_users_modes)->end -
3830 (*channel_users_modes)->data));
3832 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3833 silc_buffer_pull(*channel_users_modes, len);
3834 silc_buffer_free(tmp);
3838 silc_buffer_free(clidp);
3840 silc_hash_table_list_reset(&htl);
3841 silc_buffer_free(chidp);
3842 silc_buffer_free(csidp);
3845 /* Returns assembled packets for all channels and users on those channels
3846 from the given ID List. The packets are in the form dictated by the
3847 New Channel and New Channel User payloads. */
3849 void silc_server_announce_get_channels(SilcServer server,
3851 SilcBuffer *channels,
3852 SilcBuffer **channel_modes,
3853 SilcBuffer *channel_users,
3854 SilcBuffer **channel_users_modes,
3855 SilcUInt32 *channel_users_modes_c,
3856 SilcBuffer **channel_topics,
3857 SilcChannelID ***channel_ids,
3858 unsigned long creation_time)
3860 SilcIDCacheList list;
3861 SilcIDCacheEntry id_cache;
3862 SilcChannelEntry channel;
3865 SilcUInt16 name_len;
3867 int i = *channel_users_modes_c;
3870 SILC_LOG_DEBUG(("Start"));
3872 /* Go through all channels in the list */
3873 if (silc_idcache_get_all(id_list->channels, &list)) {
3874 if (silc_idcache_list_first(list, &id_cache)) {
3876 channel = (SilcChannelEntry)id_cache->context;
3878 if (creation_time && channel->created < creation_time)
3883 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3884 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3885 name_len = strlen(channel->channel_name);
3888 len = 4 + name_len + id_len + 4;
3890 silc_buffer_realloc(*channels,
3891 (*channels ? (*channels)->truelen +
3893 silc_buffer_pull_tail(*channels,
3894 ((*channels)->end - (*channels)->data));
3895 silc_buffer_format(*channels,
3896 SILC_STR_UI_SHORT(name_len),
3897 SILC_STR_UI_XNSTRING(channel->channel_name,
3899 SILC_STR_UI_SHORT(id_len),
3900 SILC_STR_UI_XNSTRING(cid, id_len),
3901 SILC_STR_UI_INT(channel->mode),
3903 silc_buffer_pull(*channels, len);
3906 /* Channel user modes */
3907 *channel_users_modes = silc_realloc(*channel_users_modes,
3908 sizeof(**channel_users_modes) *
3910 (*channel_users_modes)[i] = NULL;
3911 *channel_modes = silc_realloc(*channel_modes,
3912 sizeof(**channel_modes) * (i + 1));
3913 (*channel_modes)[i] = NULL;
3914 *channel_ids = silc_realloc(*channel_ids,
3915 sizeof(**channel_ids) * (i + 1));
3916 (*channel_ids)[i] = NULL;
3917 silc_server_announce_get_channel_users(server, channel,
3918 &(*channel_modes)[i],
3920 &(*channel_users_modes)[i]);
3921 (*channel_ids)[i] = channel->id;
3923 /* Channel's topic */
3924 *channel_topics = silc_realloc(*channel_topics,
3925 sizeof(**channel_topics) * (i + 1));
3926 (*channel_topics)[i] = NULL;
3927 silc_server_announce_get_channel_topic(server, channel,
3928 &(*channel_topics)[i]);
3931 if (!silc_idcache_list_next(list, &id_cache))
3935 *channel_users_modes_c += i;
3938 silc_idcache_list_free(list);
3942 /* This function is used to announce our existing channels to our router
3943 when we've connected to it. This also announces the users on the
3944 channels to the router. If the `creation_time' is non-zero only the
3945 channels that was created after the `creation_time' are announced.
3946 Note that the channel users are still announced even if the `creation_time'
3949 void silc_server_announce_channels(SilcServer server,
3950 unsigned long creation_time,
3951 SilcSocketConnection remote)
3953 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
3954 SilcBuffer *channel_users_modes = NULL;
3955 SilcBuffer *channel_topics = NULL;
3956 SilcUInt32 channel_users_modes_c = 0;
3957 SilcChannelID **channel_ids = NULL;
3959 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3961 /* Get channels and channel users in local list */
3962 silc_server_announce_get_channels(server, server->local_list,
3963 &channels, &channel_modes,
3965 &channel_users_modes,
3966 &channel_users_modes_c,
3968 &channel_ids, creation_time);
3970 /* Get channels and channel users in global list */
3971 if (server->server_type != SILC_SERVER)
3972 silc_server_announce_get_channels(server, server->global_list,
3973 &channels, &channel_modes,
3975 &channel_users_modes,
3976 &channel_users_modes_c,
3978 &channel_ids, creation_time);
3981 silc_buffer_push(channels, channels->data - channels->head);
3982 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3984 /* Send the packet */
3985 silc_server_packet_send(server, remote,
3986 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3987 channels->data, channels->len,
3990 silc_buffer_free(channels);
3993 if (channel_modes) {
3996 for (i = 0; i < channel_users_modes_c; i++) {
3997 if (!channel_modes[i])
3999 silc_buffer_push(channel_modes[i],
4000 channel_modes[i]->data -
4001 channel_modes[i]->head);
4002 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4003 channel_modes[i]->len);
4004 silc_server_packet_send_dest(server, remote,
4005 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4006 channel_ids[i], SILC_ID_CHANNEL,
4007 channel_modes[i]->data,
4008 channel_modes[i]->len,
4010 silc_buffer_free(channel_modes[i]);
4012 silc_free(channel_modes);
4015 if (channel_users) {
4016 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4017 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4018 channel_users->len);
4020 /* Send the packet */
4021 silc_server_packet_send(server, remote,
4022 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4023 channel_users->data, channel_users->len,
4026 silc_buffer_free(channel_users);
4029 if (channel_users_modes) {
4032 for (i = 0; i < channel_users_modes_c; i++) {
4033 if (!channel_users_modes[i])
4035 silc_buffer_push(channel_users_modes[i],
4036 channel_users_modes[i]->data -
4037 channel_users_modes[i]->head);
4038 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4039 channel_users_modes[i]->len);
4040 silc_server_packet_send_dest(server, remote,
4041 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4042 channel_ids[i], SILC_ID_CHANNEL,
4043 channel_users_modes[i]->data,
4044 channel_users_modes[i]->len,
4046 silc_buffer_free(channel_users_modes[i]);
4048 silc_free(channel_users_modes);
4051 if (channel_topics) {
4054 for (i = 0; i < channel_users_modes_c; i++) {
4055 if (!channel_topics[i])
4058 silc_buffer_push(channel_topics[i],
4059 channel_topics[i]->data -
4060 channel_topics[i]->head);
4061 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4062 channel_topics[i]->len);
4063 silc_server_packet_send_dest(server, remote,
4064 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4065 channel_ids[i], SILC_ID_CHANNEL,
4066 channel_topics[i]->data,
4067 channel_topics[i]->len,
4069 silc_buffer_free(channel_topics[i]);
4071 silc_free(channel_topics);
4074 silc_free(channel_ids);
4077 /* Failure timeout callback. If this is called then we will immediately
4078 process the received failure. We always process the failure with timeout
4079 since we do not want to blindly trust to received failure packets.
4080 This won't be called (the timeout is cancelled) if the failure was
4081 bogus (it is bogus if remote does not close the connection after sending
4084 SILC_TASK_CALLBACK(silc_server_failure_callback)
4086 SilcServerFailureContext f = (SilcServerFailureContext)context;
4088 if (f->sock->protocol) {
4089 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4090 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4096 /* Assembles user list and users mode list from the `channel'. */
4098 bool silc_server_get_users_on_channel(SilcServer server,
4099 SilcChannelEntry channel,
4100 SilcBuffer *user_list,
4101 SilcBuffer *mode_list,
4102 SilcUInt32 *user_count)
4104 SilcChannelClientEntry chl;
4105 SilcHashTableList htl;
4106 SilcBuffer client_id_list;
4107 SilcBuffer client_mode_list;
4109 SilcUInt32 list_count = 0, len = 0;
4111 if (!silc_hash_table_count(channel->user_list))
4114 silc_hash_table_list(channel->user_list, &htl);
4115 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4116 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4117 silc_hash_table_list_reset(&htl);
4119 client_id_list = silc_buffer_alloc(len);
4121 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4122 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4123 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4125 silc_hash_table_list(channel->user_list, &htl);
4126 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4128 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4129 silc_buffer_put(client_id_list, idp->data, idp->len);
4130 silc_buffer_pull(client_id_list, idp->len);
4131 silc_buffer_free(idp);
4133 /* Client's mode on channel */
4134 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4135 silc_buffer_pull(client_mode_list, 4);
4139 silc_hash_table_list_reset(&htl);
4140 silc_buffer_push(client_id_list,
4141 client_id_list->data - client_id_list->head);
4142 silc_buffer_push(client_mode_list,
4143 client_mode_list->data - client_mode_list->head);
4145 *user_list = client_id_list;
4146 *mode_list = client_mode_list;
4147 *user_count = list_count;
4151 /* Saves users and their modes to the `channel'. */
4153 void silc_server_save_users_on_channel(SilcServer server,
4154 SilcSocketConnection sock,
4155 SilcChannelEntry channel,
4156 SilcClientID *noadd,
4157 SilcBuffer user_list,
4158 SilcBuffer mode_list,
4159 SilcUInt32 user_count)
4164 SilcClientID *client_id;
4165 SilcClientEntry client;
4166 SilcIDCacheEntry cache;
4167 SilcChannelClientEntry chl;
4170 SILC_LOG_DEBUG(("Start"));
4172 for (i = 0; i < user_count; i++) {
4174 SILC_GET16_MSB(idp_len, user_list->data + 2);
4176 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4177 silc_buffer_pull(user_list, idp_len);
4182 SILC_GET32_MSB(mode, mode_list->data);
4183 silc_buffer_pull(mode_list, 4);
4185 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4186 silc_free(client_id);
4192 /* Check if we have this client cached already. */
4193 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4194 server->server_type, &cache);
4196 client = silc_idlist_find_client_by_id(server->global_list,
4197 client_id, server->server_type,
4202 /* If router did not find such Client ID in its lists then this must
4203 be bogus client or some router in the net is buggy. */
4204 if (server->server_type == SILC_ROUTER) {
4205 silc_free(client_id);
4209 /* We don't have that client anywhere, add it. The client is added
4210 to global list since server didn't have it in the lists so it must be
4212 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4213 silc_id_dup(client_id, SILC_ID_CLIENT),
4214 sock->user_data, NULL, 0);
4216 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4217 silc_free(client_id);
4221 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4223 /* Found, if it is from global list we'll assure that we won't
4224 expire it now that the entry is on channel. */
4229 silc_free(client_id);
4231 if (!silc_server_client_on_channel(client, channel, &chl)) {
4232 /* Client was not on the channel, add it. */
4233 chl = silc_calloc(1, sizeof(*chl));
4234 chl->client = client;
4236 chl->channel = channel;
4237 silc_hash_table_add(channel->user_list, chl->client, chl);
4238 silc_hash_table_add(client->channels, chl->channel, chl);
4239 channel->user_count++;
4247 /* Saves channels and channels user modes to the `client'. Removes
4248 the client from those channels that are not sent in the list but
4251 void silc_server_save_user_channels(SilcServer server,
4252 SilcSocketConnection sock,
4253 SilcClientEntry client,
4254 SilcBuffer channels,
4255 SilcBuffer channels_user_modes)
4258 SilcUInt32 *chumodes;
4259 SilcChannelPayload entry;
4260 SilcChannelEntry channel;
4261 SilcChannelID *channel_id;
4262 SilcChannelClientEntry chl;
4263 SilcHashTable ht = NULL;
4264 SilcHashTableList htl;
4268 if (!channels ||!channels_user_modes)
4271 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4272 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4274 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4275 NULL, NULL, NULL, TRUE);
4276 silc_dlist_start(ch);
4277 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4278 /* Check if we have this channel, and add it if we don't have it.
4279 Also add the client on the channel unless it is there already. */
4280 channel_id = silc_channel_get_id_parse(entry);
4281 channel = silc_idlist_find_channel_by_id(server->local_list,
4284 channel = silc_idlist_find_channel_by_id(server->global_list,
4287 if (server->server_type != SILC_SERVER) {
4288 silc_free(channel_id);
4293 /* We don't have that channel anywhere, add it. */
4294 name = silc_channel_get_name(entry, NULL);
4295 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4296 channel_id, server->router,
4299 silc_free(channel_id);
4306 channel->mode = silc_channel_get_mode(entry);
4308 /* Add the client on the channel */
4309 if (!silc_server_client_on_channel(client, channel, &chl)) {
4310 chl = silc_calloc(1, sizeof(*chl));
4311 chl->client = client;
4312 chl->mode = chumodes[i++];
4313 chl->channel = channel;
4314 silc_hash_table_add(channel->user_list, chl->client, chl);
4315 silc_hash_table_add(client->channels, chl->channel, chl);
4316 channel->user_count++;
4319 chl->mode = chumodes[i++];
4322 silc_hash_table_add(ht, channel, channel);
4323 silc_free(channel_id);
4325 silc_channel_payload_list_free(ch);
4326 silc_free(chumodes);
4330 /* Go through the list again and remove client from channels that
4331 are no part of the list. */
4333 silc_hash_table_list(client->channels, &htl);
4334 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4335 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4336 silc_hash_table_del(chl->channel->user_list, chl->client);
4337 silc_hash_table_del(chl->client->channels, chl->channel);
4341 silc_hash_table_list_reset(&htl);
4342 silc_hash_table_free(ht);
4344 silc_hash_table_list(client->channels, &htl);
4345 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4346 silc_hash_table_del(chl->channel->user_list, chl->client);
4347 silc_hash_table_del(chl->client->channels, chl->channel);
4350 silc_hash_table_list_reset(&htl);
4354 /* Lookups route to the client indicated by the `id_data'. The connection
4355 object and internal data object is returned. Returns NULL if route
4356 could not be found to the client. If the `client_id' is specified then
4357 it is used and the `id_data' is ignored. */
4359 SilcSocketConnection
4360 silc_server_get_client_route(SilcServer server,
4361 unsigned char *id_data,
4363 SilcClientID *client_id,
4364 SilcIDListData *idata,
4365 SilcClientEntry *client_entry)
4368 SilcClientEntry client;
4370 SILC_LOG_DEBUG(("Start"));
4373 *client_entry = NULL;
4375 /* Decode destination Client ID */
4377 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4379 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4383 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4386 /* If the destination belongs to our server we don't have to route
4387 the packet anywhere but to send it to the local destination. */
4388 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4392 /* If we are router and the client has router then the client is in
4393 our cell but not directly connected to us. */
4394 if (server->server_type == SILC_ROUTER && client->router) {
4395 /* We are of course in this case the client's router thus the route
4396 to the client is the server who owns the client. So, we will send
4397 the packet to that server. */
4399 *idata = (SilcIDListData)client->router;
4400 return client->router->connection;
4403 /* Seems that client really is directly connected to us */
4405 *idata = (SilcIDListData)client;
4407 *client_entry = client;
4408 return client->connection;
4411 /* Destination belongs to someone not in this server. If we are normal
4412 server our action is to send the packet to our router. */
4413 if (server->server_type != SILC_ROUTER && !server->standalone) {
4416 *idata = (SilcIDListData)server->router;
4417 return server->router->connection;
4420 /* We are router and we will perform route lookup for the destination
4421 and send the packet to fastest route. */
4422 if (server->server_type == SILC_ROUTER && !server->standalone) {
4423 /* Check first that the ID is valid */
4424 client = silc_idlist_find_client_by_id(server->global_list, id,
4427 SilcSocketConnection dst_sock;
4429 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4433 *idata = (SilcIDListData)dst_sock->user_data;
4442 /* Encodes and returns channel list of channels the `client' has joined.
4443 Secret channels are not put to the list. */
4445 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4446 SilcClientEntry client,
4449 SilcBuffer *user_mode_list)
4451 SilcBuffer buffer = NULL;
4452 SilcChannelEntry channel;
4453 SilcChannelClientEntry chl;
4454 SilcHashTableList htl;
4457 SilcUInt16 name_len;
4461 *user_mode_list = NULL;
4463 silc_hash_table_list(client->channels, &htl);
4464 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4465 channel = chl->channel;
4467 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4469 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4472 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4473 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4474 name_len = strlen(channel->channel_name);
4476 len = 4 + name_len + id_len + 4;
4477 buffer = silc_buffer_realloc(buffer,
4478 (buffer ? buffer->truelen + len : len));
4479 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4480 silc_buffer_format(buffer,
4481 SILC_STR_UI_SHORT(name_len),
4482 SILC_STR_UI_XNSTRING(channel->channel_name,
4484 SILC_STR_UI_SHORT(id_len),
4485 SILC_STR_UI_XNSTRING(cid, id_len),
4486 SILC_STR_UI_INT(chl->channel->mode),
4488 silc_buffer_pull(buffer, len);
4491 if (user_mode_list) {
4492 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4494 (*user_mode_list)->truelen + 4 :
4496 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4497 (*user_mode_list)->data));
4498 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4499 silc_buffer_pull(*user_mode_list, 4);
4502 silc_hash_table_list_reset(&htl);
4505 silc_buffer_push(buffer, buffer->data - buffer->head);
4506 if (user_mode_list && *user_mode_list)
4507 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4508 (*user_mode_list)->head));
4513 /* Finds client entry by Client ID and if it is not found then resolves
4514 it using WHOIS command. */
4516 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4517 SilcClientID *client_id,
4518 bool always_resolve,
4521 SilcClientEntry client;
4526 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4529 client = silc_idlist_find_client_by_id(server->global_list,
4530 client_id, TRUE, NULL);
4531 if (!client && server->server_type == SILC_ROUTER)
4535 if (!client && server->standalone)
4538 if (!client || !client->nickname || !client->username ||
4540 SilcBuffer buffer, idp;
4543 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4544 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4545 client->resolve_cmd_ident = ++server->cmd_ident;
4548 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4549 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4550 server->cmd_ident, 1,
4551 4, idp->data, idp->len);
4552 silc_server_packet_send(server, client ? client->router->connection :
4553 server->router->connection,
4554 SILC_PACKET_COMMAND, 0,
4555 buffer->data, buffer->len, FALSE);
4556 silc_buffer_free(idp);
4557 silc_buffer_free(buffer);
4568 /* A timeout callback for the re-key. We will be the initiator of the
4571 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4573 SilcSocketConnection sock = (SilcSocketConnection)context;
4574 SilcIDListData idata = (SilcIDListData)sock->user_data;
4575 SilcServer server = (SilcServer)idata->rekey->context;
4576 SilcProtocol protocol;
4577 SilcServerRekeyInternalContext *proto_ctx;
4579 SILC_LOG_DEBUG(("Start"));
4581 /* Allocate internal protocol context. This is sent as context
4583 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4584 proto_ctx->server = (void *)server;
4585 proto_ctx->sock = sock;
4586 proto_ctx->responder = FALSE;
4587 proto_ctx->pfs = idata->rekey->pfs;
4589 /* Perform rekey protocol. Will call the final callback after the
4590 protocol is over. */
4591 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4592 &protocol, proto_ctx, silc_server_rekey_final);
4593 sock->protocol = protocol;
4595 /* Run the protocol */
4596 silc_protocol_execute(protocol, server->schedule, 0, 0);
4598 /* Re-register re-key timeout */
4599 silc_schedule_task_add(server->schedule, sock->sock,
4600 silc_server_rekey_callback,
4601 context, idata->rekey->timeout, 0,
4602 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4605 /* The final callback for the REKEY protocol. This will actually take the
4606 new key material into use. */
4608 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4610 SilcProtocol protocol = (SilcProtocol)context;
4611 SilcServerRekeyInternalContext *ctx =
4612 (SilcServerRekeyInternalContext *)protocol->context;
4613 SilcServer server = (SilcServer)ctx->server;
4614 SilcSocketConnection sock = ctx->sock;
4616 SILC_LOG_DEBUG(("Start"));
4618 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4619 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4620 /* Error occured during protocol */
4621 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4622 silc_protocol_cancel(protocol, server->schedule);
4623 silc_protocol_free(protocol);
4624 sock->protocol = NULL;
4626 silc_packet_context_free(ctx->packet);
4628 silc_ske_free(ctx->ske);
4633 /* Purge the outgoing data queue to assure that all rekey packets really
4634 go to the network before we quit the protocol. */
4635 silc_server_packet_queue_purge(server, sock);
4638 silc_protocol_free(protocol);
4639 sock->protocol = NULL;
4641 silc_packet_context_free(ctx->packet);
4643 silc_ske_free(ctx->ske);
4647 /* Task callback used to retrieve network statistical information from
4648 router server once in a while. */
4650 SILC_TASK_CALLBACK(silc_server_get_stats)
4652 SilcServer server = (SilcServer)context;
4653 SilcBuffer idp, packet;
4655 SILC_LOG_DEBUG(("Retrieving stats from router"));
4657 if (!server->standalone) {
4658 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4659 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4660 ++server->cmd_ident, 1,
4661 1, idp->data, idp->len);
4662 silc_server_packet_send(server, server->router->connection,
4663 SILC_PACKET_COMMAND, 0, packet->data,
4664 packet->len, FALSE);
4665 silc_buffer_free(packet);
4666 silc_buffer_free(idp);
4669 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4670 server, 120, 0, SILC_TASK_TIMEOUT,