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 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
730 sconn->retry_timeout));
732 /* We will lookup a fresh pointer later */
733 silc_server_config_unref(&sconn->conn);
735 /* Wait one before retrying */
736 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
737 context, sconn->retry_timeout, 0,
738 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
741 /* Generic routine to use connect to a router. */
743 SILC_TASK_CALLBACK(silc_server_connect_router)
745 SilcServerConnection sconn = (SilcServerConnection)context;
746 SilcServer server = sconn->server;
747 SilcServerConfigRouter *rconn;
750 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
751 (sconn->backup ? "backup router" : "router"),
752 sconn->remote_host, sconn->remote_port));
754 server->router_connect = time(NULL);
755 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
758 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
759 (sconn->backup ? "backup router" : "router"),
760 sconn->remote_host, sconn->remote_port));
761 silc_free(sconn->remote_host);
762 silc_free(sconn->backup_replace_ip);
766 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
768 /* Connect to remote host */
769 sock = silc_net_create_connection(
770 (!server->config->server_info->primary ? NULL :
771 server->config->server_info->primary->server_ip),
772 sconn->remote_port, sconn->remote_host);
774 SILC_LOG_ERROR(("Could not connect to router %s:%d",
775 sconn->remote_host, sconn->remote_port));
776 if (!sconn->no_reconnect)
777 silc_schedule_task_add(server->schedule, 0,
778 silc_server_connect_to_router_retry,
779 context, 0, 1, SILC_TASK_TIMEOUT,
780 SILC_TASK_PRI_NORMAL);
782 silc_server_config_unref(&sconn->conn);
786 /* Continue with key exchange protocol */
787 silc_server_start_key_exchange(server, sconn, sock);
790 /* This function connects to our primary router or if we are a router this
791 establishes all our primary routes. This is called at the start of the
792 server to do authentication and key exchange with our router - called
795 SILC_TASK_CALLBACK(silc_server_connect_to_router)
797 SilcServer server = (SilcServer)context;
798 SilcServerConnection sconn;
799 SilcServerConfigRouter *ptr;
801 SILC_LOG_DEBUG(("Connecting to router(s)"));
803 if (server->server_type == SILC_SERVER) {
804 SILC_LOG_DEBUG(("We are normal server"));
805 } else if (server->server_type == SILC_ROUTER) {
806 SILC_LOG_DEBUG(("We are router"));
808 SILC_LOG_DEBUG(("We are backup router/normal server"));
811 if (!server->config->routers) {
812 /* There wasn't a configured router, we will continue but we don't
813 have a connection to outside world. We will be standalone server. */
814 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
815 server->standalone = TRUE;
819 /* Cancel any possible retry timeouts */
820 silc_schedule_task_del_by_callback(server->schedule,
821 silc_server_connect_router);
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Create the connections to all our routes */
826 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
828 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
829 ptr->backup_router ? "Backup router" : "Router",
830 ptr->initiator ? "Initiator" : "Responder",
831 ptr->host, ptr->port));
833 if (ptr->initiator) {
834 /* Check whether we are connected to this host already */
835 if (silc_server_num_sockets_by_remote(server,
836 silc_net_is_ip(ptr->host) ?
838 silc_net_is_ip(ptr->host) ?
839 NULL : ptr->host, ptr->port,
840 SILC_SOCKET_TYPE_ROUTER)) {
841 SILC_LOG_DEBUG(("We are already connected to this router"));
845 /* Allocate connection object for hold connection specific stuff. */
846 sconn = silc_calloc(1, sizeof(*sconn));
847 sconn->server = server;
848 sconn->remote_host = strdup(ptr->host);
849 sconn->remote_port = ptr->port;
850 sconn->backup = ptr->backup_router;
852 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
853 sconn->backup_replace_port = ptr->backup_replace_port;
856 if (!server->router_conn && !sconn->backup)
857 server->router_conn = sconn;
859 silc_schedule_task_add(server->schedule, 0,
860 silc_server_connect_router,
861 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
862 SILC_TASK_PRI_NORMAL);
867 /* Second part of connecting to router(s). Key exchange protocol has been
868 executed and now we will execute authentication protocol. */
870 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
872 SilcProtocol protocol = (SilcProtocol)context;
873 SilcServerKEInternalContext *ctx =
874 (SilcServerKEInternalContext *)protocol->context;
875 SilcServer server = (SilcServer)ctx->server;
876 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
877 SilcSocketConnection sock = ctx->sock;
878 SilcServerConnAuthInternalContext *proto_ctx;
879 SilcServerConfigRouter *conn = NULL;
881 SILC_LOG_DEBUG(("Start"));
883 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
884 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
885 /* Error occured during protocol */
886 silc_protocol_free(protocol);
887 sock->protocol = NULL;
888 silc_ske_free_key_material(ctx->keymat);
890 silc_packet_context_free(ctx->packet);
892 silc_ske_free(ctx->ske);
893 silc_free(ctx->dest_id);
895 silc_server_config_unref(&sconn->conn);
896 silc_free(sconn->remote_host);
897 silc_free(sconn->backup_replace_ip);
899 silc_schedule_task_del_by_callback(server->schedule,
900 silc_server_failure_callback);
901 silc_server_disconnect_remote(server, sock,
902 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
906 /* We now have the key material as the result of the key exchange
907 protocol. Take the key material into use. Free the raw key material
908 as soon as we've set them into use. */
909 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
910 ctx->sock, ctx->keymat,
911 ctx->ske->prop->cipher,
912 ctx->ske->prop->pkcs,
913 ctx->ske->prop->hash,
914 ctx->ske->prop->hmac,
915 ctx->ske->prop->group,
917 silc_protocol_free(protocol);
918 sock->protocol = NULL;
919 silc_ske_free_key_material(ctx->keymat);
921 silc_packet_context_free(ctx->packet);
923 silc_ske_free(ctx->ske);
924 silc_free(ctx->dest_id);
926 silc_server_config_unref(&sconn->conn);
927 silc_free(sconn->remote_host);
928 silc_free(sconn->backup_replace_ip);
930 silc_schedule_task_del_by_callback(server->schedule,
931 silc_server_failure_callback);
932 silc_server_disconnect_remote(server, sock,
933 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
936 silc_ske_free_key_material(ctx->keymat);
938 /* Allocate internal context for the authentication protocol. This
939 is sent as context for the protocol. */
940 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
941 proto_ctx->server = (void *)server;
942 proto_ctx->context = (void *)sconn;
943 proto_ctx->sock = sock;
944 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
945 proto_ctx->dest_id_type = ctx->dest_id_type;
946 proto_ctx->dest_id = ctx->dest_id;
948 /* Resolve the authentication method used in this connection. Check if
949 we find a match from user configured connections */
950 if (!sconn->conn.ref_ptr)
951 conn = silc_server_config_find_router_conn(server, sock->hostname,
954 conn = sconn->conn.ref_ptr;
957 /* Match found. Use the configured authentication method. Take only
958 the passphrase, since for public key auth we automatically use
959 our local key pair. */
960 if (conn->passphrase) {
961 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
962 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
964 proto_ctx->auth_data = strdup(conn->passphrase);
965 proto_ctx->auth_data_len = strlen(conn->passphrase);
966 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
968 } else if (conn->publickeys) {
969 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
971 proto_ctx->auth_meth = SILC_AUTH_NONE;
974 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
975 sock->hostname, sock->ip, sock->port));
976 silc_protocol_free(protocol);
977 sock->protocol = NULL;
979 silc_packet_context_free(ctx->packet);
981 silc_ske_free(ctx->ske);
982 silc_free(ctx->dest_id);
984 silc_server_config_unref(&sconn->conn);
985 silc_free(sconn->remote_host);
986 silc_free(sconn->backup_replace_ip);
988 silc_schedule_task_del_by_callback(server->schedule,
989 silc_server_failure_callback);
990 silc_server_disconnect_remote(server, sock,
991 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
995 /* Free old protocol as it is finished now */
996 silc_protocol_free(protocol);
998 silc_packet_context_free(ctx->packet);
1000 sock->protocol = NULL;
1002 /* Allocate the authentication protocol. This is allocated here
1003 but we won't start it yet. We will be receiving party of this
1004 protocol thus we will wait that connecting party will make
1005 their first move. */
1006 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1007 &sock->protocol, proto_ctx,
1008 silc_server_connect_to_router_final);
1010 /* Register timeout task. If the protocol is not executed inside
1011 this timelimit the connection will be terminated. */
1012 proto_ctx->timeout_task =
1013 silc_schedule_task_add(server->schedule, sock->sock,
1014 silc_server_timeout_remote,
1016 server->config->conn_auth_timeout, 0,
1020 /* Run the protocol */
1021 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1024 /* Finalizes the connection to router. Registers a server task to the
1025 queue so that we can accept new connections. */
1027 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1029 SilcProtocol protocol = (SilcProtocol)context;
1030 SilcServerConnAuthInternalContext *ctx =
1031 (SilcServerConnAuthInternalContext *)protocol->context;
1032 SilcServer server = (SilcServer)ctx->server;
1033 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1034 SilcSocketConnection sock = ctx->sock;
1035 SilcServerEntry id_entry;
1037 SilcServerHBContext hb_context;
1038 unsigned char *id_string;
1040 SilcIDListData idata;
1041 SilcServerConfigRouter *conn = NULL;
1042 SilcServerConfigConnParams *param = NULL;
1044 SILC_LOG_DEBUG(("Start"));
1046 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1047 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1048 /* Error occured during protocol */
1049 silc_free(ctx->dest_id);
1050 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1055 /* Add a task to the queue. This task receives new connections to the
1056 server. This task remains on the queue until the end of the program. */
1057 if (!server->listenning && !sconn->backup) {
1058 silc_schedule_task_add(server->schedule, server->sock,
1059 silc_server_accept_new_connection,
1060 (void *)server, 0, 0,
1062 SILC_TASK_PRI_NORMAL);
1063 server->listenning = TRUE;
1066 /* Send NEW_SERVER packet to the router. We will become registered
1067 to the SILC network after sending this packet. */
1068 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1069 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1070 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1071 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1072 silc_buffer_format(packet,
1073 SILC_STR_UI_SHORT(id_len),
1074 SILC_STR_UI_XNSTRING(id_string, id_len),
1075 SILC_STR_UI_SHORT(strlen(server->server_name)),
1076 SILC_STR_UI_XNSTRING(server->server_name,
1077 strlen(server->server_name)),
1080 /* Send the packet */
1081 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1082 packet->data, packet->len, TRUE);
1083 silc_buffer_free(packet);
1084 silc_free(id_string);
1086 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1088 /* Check that we do not have this ID already */
1089 id_entry = silc_idlist_find_server_by_id(server->local_list,
1090 ctx->dest_id, TRUE, NULL);
1092 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1094 id_entry = silc_idlist_find_server_by_id(server->global_list,
1095 ctx->dest_id, TRUE, NULL);
1097 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1100 SILC_LOG_DEBUG(("New server id(%s)",
1101 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1103 /* Add the connected router to global server list */
1104 id_entry = silc_idlist_add_server(server->global_list,
1105 strdup(sock->hostname),
1106 SILC_ROUTER, ctx->dest_id, NULL, sock);
1108 silc_free(ctx->dest_id);
1109 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1110 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1115 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1116 silc_free(sock->user_data);
1117 sock->user_data = (void *)id_entry;
1118 sock->type = SILC_SOCKET_TYPE_ROUTER;
1119 idata = (SilcIDListData)sock->user_data;
1120 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1122 conn = sconn->conn.ref_ptr;
1123 param = &server->config->param;
1124 if (conn && conn->param)
1125 param = conn->param;
1127 /* Perform keepalive. The `hb_context' will be freed automatically
1128 when finally calling the silc_socket_free function. */
1129 hb_context = silc_calloc(1, sizeof(*hb_context));
1130 hb_context->server = server;
1131 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1132 silc_server_perform_heartbeat,
1135 /* Register re-key timeout */
1136 idata->rekey->timeout = param->key_exchange_rekey;
1137 idata->rekey->context = (void *)server;
1138 silc_schedule_task_add(server->schedule, sock->sock,
1139 silc_server_rekey_callback,
1140 (void *)sock, idata->rekey->timeout, 0,
1141 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1143 if (!sconn->backup) {
1144 /* Mark this router our primary router if we're still standalone */
1145 if (server->standalone) {
1146 server->id_entry->router = id_entry;
1147 server->router = id_entry;
1148 server->standalone = FALSE;
1150 /* If we are router then announce our possible servers. */
1151 if (server->server_type == SILC_ROUTER)
1152 silc_server_announce_servers(server, FALSE, 0,
1153 SILC_PRIMARY_ROUTE(server));
1155 /* Announce our clients and channels to the router */
1156 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1157 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1159 #ifdef BACKUP_SINGLE_ROUTER
1160 /* If we are backup router then this primary router is whom we are
1162 if (server->server_type == SILC_BACKUP_ROUTER)
1163 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1164 #endif /* BACKUP_SINGLE_ROUTER */
1167 /* Add this server to be our backup router */
1168 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1169 sconn->backup_replace_port, FALSE);
1172 sock->protocol = NULL;
1174 /* Call the completion callback to indicate that we've connected to
1176 if (sconn->callback)
1177 (*sconn->callback)(server, id_entry, sconn->callback_context);
1180 /* Free the temporary connection data context */
1182 silc_server_config_unref(&sconn->conn);
1183 silc_free(sconn->remote_host);
1184 silc_free(sconn->backup_replace_ip);
1187 if (sconn == server->router_conn)
1188 server->router_conn = NULL;
1190 /* Free the protocol object */
1191 if (sock->protocol == protocol)
1192 sock->protocol = NULL;
1193 silc_protocol_free(protocol);
1195 silc_packet_context_free(ctx->packet);
1197 silc_ske_free(ctx->ske);
1198 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1199 silc_free(ctx->auth_data);
1203 /* Host lookup callback that is called after the incoming connection's
1204 IP and FQDN lookup is performed. This will actually check the acceptance
1205 of the incoming connection and will register the key exchange protocol
1206 for this connection. */
1209 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1212 SilcServerKEInternalContext *proto_ctx =
1213 (SilcServerKEInternalContext *)context;
1214 SilcServer server = (SilcServer)proto_ctx->server;
1215 SilcServerConfigClient *cconfig = NULL;
1216 SilcServerConfigServer *sconfig = NULL;
1217 SilcServerConfigRouter *rconfig = NULL;
1218 SilcServerConfigDeny *deny;
1221 context = (void *)server;
1223 /* Check whether we could resolve both IP and FQDN. */
1224 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1225 server->config->require_reverse_lookup)) {
1226 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1227 sock->hostname ? sock->hostname :
1228 sock->ip ? sock->ip : ""));
1229 server->stat.conn_failures++;
1230 silc_server_disconnect_remote(server, sock,
1231 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1232 "Unknown host or IP");
1233 silc_free(proto_ctx);
1237 /* Register the connection for network input and output. This sets
1238 that scheduler will listen for incoming packets for this connection
1239 and sets that outgoing packets may be sent to this connection as well.
1240 However, this doesn't set the scheduler for outgoing traffic, it
1241 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1242 later when outgoing data is available. */
1243 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1245 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1248 /* Listenning port */
1249 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1250 silc_server_disconnect_remote(server, sock,
1251 SILC_STATUS_ERR_RESOURCE_LIMIT,
1252 "Connection refused");
1253 server->stat.conn_failures++;
1254 silc_free(proto_ctx);
1257 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1259 /* Check whether this connection is denied to connect to us. */
1260 deny = silc_server_config_find_denied(server, sock->ip);
1262 deny = silc_server_config_find_denied(server, sock->hostname);
1264 /* The connection is denied */
1265 SILC_LOG_INFO(("Connection %s (%s) is denied",
1266 sock->hostname, sock->ip));
1267 silc_server_disconnect_remote(server, sock,
1268 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1270 server->stat.conn_failures++;
1271 silc_free(proto_ctx);
1275 /* Check whether we have configured this sort of connection at all. We
1276 have to check all configurations since we don't know what type of
1277 connection this is. */
1278 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1279 cconfig = silc_server_config_find_client(server, sock->hostname);
1280 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1281 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1282 if (server->server_type == SILC_ROUTER) {
1283 if (!(rconfig = silc_server_config_find_router_conn(server,
1284 sock->ip, sock->port)))
1285 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1288 if (!cconfig && !sconfig && !rconfig) {
1289 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1291 silc_server_disconnect_remote(server, sock,
1292 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1293 server->stat.conn_failures++;
1294 silc_free(proto_ctx);
1298 /* The connection is allowed */
1300 /* Set internal context for key exchange protocol. This is
1301 sent as context for the protocol. */
1302 proto_ctx->sock = sock;
1303 proto_ctx->rng = server->rng;
1304 proto_ctx->responder = TRUE;
1305 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1306 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1307 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1309 /* Take flags for key exchange. Since we do not know what type of connection
1310 this is, we go through all found configurations and use the global ones
1311 as well. This will result always into strictest key exchange flags. */
1312 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1313 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1314 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1315 if (server->config->param.key_exchange_pfs)
1316 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1318 /* Prepare the connection for key exchange protocol. We allocate the
1319 protocol but will not start it yet. The connector will be the
1320 initiator of the protocol thus we will wait for initiation from
1321 there before we start the protocol. */
1322 server->stat.auth_attempts++;
1323 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1324 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1325 &sock->protocol, proto_ctx,
1326 silc_server_accept_new_connection_second);
1328 /* Register a timeout task that will be executed if the connector
1329 will not start the key exchange protocol within specified timeout
1330 and the connection will be closed. */
1331 proto_ctx->timeout_task =
1332 silc_schedule_task_add(server->schedule, sock->sock,
1333 silc_server_timeout_remote,
1335 server->config->key_exchange_timeout, 0,
1340 /* Accepts new connections to the server. Accepting new connections are
1341 done in three parts to make it async. */
1343 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1345 SilcServer server = (SilcServer)context;
1346 SilcSocketConnection newsocket;
1347 SilcServerKEInternalContext *proto_ctx;
1350 SILC_LOG_DEBUG(("Accepting new connection"));
1352 server->stat.conn_attempts++;
1354 sock = silc_net_accept_connection(fd);
1356 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1357 server->stat.conn_failures++;
1361 /* Check for maximum allowed connections */
1362 if (sock > server->config->param.connections_max) {
1363 SILC_LOG_ERROR(("Refusing connection, server is full"));
1364 server->stat.conn_failures++;
1365 silc_net_close_connection(sock);
1369 /* Set socket options */
1370 silc_net_set_socket_nonblock(sock);
1371 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1373 /* We don't create a ID yet, since we don't know what type of connection
1374 this is yet. But, we do add the connection to the socket table. */
1375 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1376 server->sockets[sock] = newsocket;
1378 /* Perform asynchronous host lookup. This will lookup the IP and the
1379 FQDN of the remote connection. After the lookup is done the connection
1380 is accepted further. */
1381 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1382 proto_ctx->server = server;
1383 proto_ctx->context = (void *)fd;
1384 silc_socket_host_lookup(newsocket, TRUE,
1385 silc_server_accept_new_connection_lookup,
1386 (void *)proto_ctx, server->schedule);
1389 /* Second part of accepting new connection. Key exchange protocol has been
1390 performed and now it is time to do little connection authentication
1391 protocol to figure out whether this connection is client or server
1392 and whether it has right to access this server (especially server
1393 connections needs to be authenticated). */
1395 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1397 SilcProtocol protocol = (SilcProtocol)context;
1398 SilcServerKEInternalContext *ctx =
1399 (SilcServerKEInternalContext *)protocol->context;
1400 SilcServer server = (SilcServer)ctx->server;
1401 SilcSocketConnection sock = ctx->sock;
1402 SilcServerConnAuthInternalContext *proto_ctx;
1404 SILC_LOG_DEBUG(("Start"));
1406 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1407 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1408 /* Error occured during protocol */
1409 SILC_LOG_DEBUG(("Error key exchange protocol"));
1410 silc_protocol_free(protocol);
1411 sock->protocol = NULL;
1412 silc_ske_free_key_material(ctx->keymat);
1414 silc_packet_context_free(ctx->packet);
1416 silc_ske_free(ctx->ske);
1417 silc_free(ctx->dest_id);
1418 silc_server_config_unref(&ctx->cconfig);
1419 silc_server_config_unref(&ctx->sconfig);
1420 silc_server_config_unref(&ctx->rconfig);
1422 silc_schedule_task_del_by_callback(server->schedule,
1423 silc_server_failure_callback);
1424 silc_server_disconnect_remote(server, sock,
1425 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1427 server->stat.auth_failures++;
1431 /* We now have the key material as the result of the key exchange
1432 protocol. Take the key material into use. Free the raw key material
1433 as soon as we've set them into use. */
1434 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1435 ctx->sock, ctx->keymat,
1436 ctx->ske->prop->cipher,
1437 ctx->ske->prop->pkcs,
1438 ctx->ske->prop->hash,
1439 ctx->ske->prop->hmac,
1440 ctx->ske->prop->group,
1442 SILC_LOG_ERROR(("Error setting key material in use"));
1443 silc_protocol_free(protocol);
1444 sock->protocol = NULL;
1445 silc_ske_free_key_material(ctx->keymat);
1447 silc_packet_context_free(ctx->packet);
1449 silc_ske_free(ctx->ske);
1450 silc_free(ctx->dest_id);
1451 silc_server_config_unref(&ctx->cconfig);
1452 silc_server_config_unref(&ctx->sconfig);
1453 silc_server_config_unref(&ctx->rconfig);
1455 silc_schedule_task_del_by_callback(server->schedule,
1456 silc_server_failure_callback);
1457 silc_server_disconnect_remote(server, sock,
1458 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1459 server->stat.auth_failures++;
1462 silc_ske_free_key_material(ctx->keymat);
1464 /* Allocate internal context for the authentication protocol. This
1465 is sent as context for the protocol. */
1466 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1467 proto_ctx->server = (void *)server;
1468 proto_ctx->sock = sock;
1469 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1470 proto_ctx->responder = TRUE;
1471 proto_ctx->dest_id_type = ctx->dest_id_type;
1472 proto_ctx->dest_id = ctx->dest_id;
1473 proto_ctx->cconfig = ctx->cconfig;
1474 proto_ctx->sconfig = ctx->sconfig;
1475 proto_ctx->rconfig = ctx->rconfig;
1477 /* Free old protocol as it is finished now */
1478 silc_protocol_free(protocol);
1480 silc_packet_context_free(ctx->packet);
1482 sock->protocol = NULL;
1484 /* Allocate the authentication protocol. This is allocated here
1485 but we won't start it yet. We will be receiving party of this
1486 protocol thus we will wait that connecting party will make
1487 their first move. */
1488 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1489 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1490 &sock->protocol, proto_ctx,
1491 silc_server_accept_new_connection_final);
1493 /* Register timeout task. If the protocol is not executed inside
1494 this timelimit the connection will be terminated. */
1495 proto_ctx->timeout_task =
1496 silc_schedule_task_add(server->schedule, sock->sock,
1497 silc_server_timeout_remote,
1499 server->config->conn_auth_timeout, 0,
1504 /* Final part of accepting new connection. The connection has now
1505 been authenticated and keys has been exchanged. We also know whether
1506 this is client or server connection. */
1508 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1510 SilcProtocol protocol = (SilcProtocol)context;
1511 SilcServerConnAuthInternalContext *ctx =
1512 (SilcServerConnAuthInternalContext *)protocol->context;
1513 SilcServer server = (SilcServer)ctx->server;
1514 SilcSocketConnection sock = ctx->sock;
1515 SilcServerHBContext hb_context;
1516 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1518 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1520 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1521 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1522 /* Error occured during protocol */
1523 SILC_LOG_DEBUG(("Error during authentication protocol"));
1524 silc_protocol_free(protocol);
1525 sock->protocol = NULL;
1527 silc_packet_context_free(ctx->packet);
1529 silc_ske_free(ctx->ske);
1530 silc_free(ctx->dest_id);
1531 silc_server_config_unref(&ctx->cconfig);
1532 silc_server_config_unref(&ctx->sconfig);
1533 silc_server_config_unref(&ctx->rconfig);
1535 silc_schedule_task_del_by_callback(server->schedule,
1536 silc_server_failure_callback);
1537 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1539 server->stat.auth_failures++;
1543 entry->data.last_receive = time(NULL);
1545 switch (ctx->conn_type) {
1546 case SILC_SOCKET_TYPE_CLIENT:
1548 SilcClientEntry client;
1549 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1551 /* Verify whether this connection is after all allowed to connect */
1552 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1553 &server->config->param,
1554 conn->param, ctx->ske)) {
1555 server->stat.auth_failures++;
1559 SILC_LOG_DEBUG(("Remote host is client"));
1560 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1563 /* Add the client to the client ID cache. The nickname and Client ID
1564 and other information is created after we have received NEW_CLIENT
1565 packet from client. */
1566 client = silc_idlist_add_client(server->local_list,
1567 NULL, NULL, NULL, NULL, NULL, sock, 0);
1569 SILC_LOG_ERROR(("Could not add new client to cache"));
1570 silc_free(sock->user_data);
1571 silc_server_disconnect_remote(server, sock,
1572 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1573 server->stat.auth_failures++;
1576 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1579 server->stat.my_clients++;
1580 server->stat.clients++;
1581 server->stat.cell_clients++;
1583 /* Get connection parameters */
1585 if (conn->param->keepalive_secs)
1586 hearbeat_timeout = conn->param->keepalive_secs;
1589 id_entry = (void *)client;
1592 case SILC_SOCKET_TYPE_SERVER:
1593 case SILC_SOCKET_TYPE_ROUTER:
1595 SilcServerEntry new_server;
1596 bool initiator = FALSE;
1597 bool backup_local = FALSE;
1598 bool backup_router = FALSE;
1599 char *backup_replace_ip = NULL;
1600 SilcUInt16 backup_replace_port = 0;
1601 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1602 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1604 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1605 /* Verify whether this connection is after all allowed to connect */
1606 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1607 &server->config->param,
1608 rconn ? rconn->param : NULL,
1610 server->stat.auth_failures++;
1616 if (rconn->param->keepalive_secs)
1617 hearbeat_timeout = rconn->param->keepalive_secs;
1620 initiator = rconn->initiator;
1621 backup_local = rconn->backup_local;
1622 backup_router = rconn->backup_router;
1623 backup_replace_ip = rconn->backup_replace_ip;
1624 backup_replace_port = rconn->backup_replace_port;
1628 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1629 /* Verify whether this connection is after all allowed to connect */
1630 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1631 &server->config->param,
1632 sconn ? sconn->param : NULL,
1634 server->stat.auth_failures++;
1639 if (sconn->param->keepalive_secs)
1640 hearbeat_timeout = sconn->param->keepalive_secs;
1643 backup_router = sconn->backup_router;
1647 SILC_LOG_DEBUG(("Remote host is %s",
1648 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1649 "server" : (backup_router ?
1650 "backup router" : "router")));
1651 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1652 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1653 "server" : (backup_router ?
1654 "backup router" : "router")));
1656 /* Add the server into server cache. The server name and Server ID
1657 is updated after we have received NEW_SERVER packet from the
1658 server. We mark ourselves as router for this server if we really
1661 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1662 server->local_list : (backup_router ?
1663 server->local_list :
1664 server->global_list)),
1666 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1667 SILC_SERVER : SILC_ROUTER),
1669 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1670 server->id_entry : (backup_router ?
1671 server->id_entry : NULL)),
1674 SILC_LOG_ERROR(("Could not add new server to cache"));
1675 silc_free(sock->user_data);
1676 silc_server_disconnect_remote(server, sock,
1677 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1678 server->stat.auth_failures++;
1681 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1684 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1685 server->stat.my_servers++;
1687 server->stat.my_routers++;
1688 server->stat.routers++;
1690 server->stat.servers++;
1692 id_entry = (void *)new_server;
1694 /* If the incoming connection is router and marked as backup router
1695 then add it to be one of our backups */
1696 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1697 silc_server_backup_add(server, new_server, backup_replace_ip,
1698 backup_replace_port, backup_local);
1700 /* Change it back to SERVER type since that's what it really is. */
1702 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1704 new_server->server_type = SILC_BACKUP_ROUTER;
1707 /* Check whether this connection is to be our primary router connection
1708 if we do not already have the primary route. */
1709 if (!backup_router &&
1710 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1711 if (silc_server_config_is_primary_route(server) && !initiator)
1714 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1715 server->standalone = FALSE;
1716 if (!server->id_entry->router) {
1717 server->id_entry->router = id_entry;
1718 server->router = id_entry;
1729 sock->type = ctx->conn_type;
1731 /* Add the common data structure to the ID entry. */
1732 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1734 /* Add to sockets internal pointer for fast referencing */
1735 silc_free(sock->user_data);
1736 sock->user_data = id_entry;
1738 /* Connection has been fully established now. Everything is ok. */
1739 SILC_LOG_DEBUG(("New connection authenticated"));
1741 /* Perform keepalive. The `hb_context' will be freed automatically
1742 when finally calling the silc_socket_free function. */
1743 hb_context = silc_calloc(1, sizeof(*hb_context));
1744 hb_context->server = server;
1745 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1746 silc_server_perform_heartbeat,
1750 silc_schedule_task_del_by_callback(server->schedule,
1751 silc_server_failure_callback);
1752 silc_protocol_free(protocol);
1754 silc_packet_context_free(ctx->packet);
1756 silc_ske_free(ctx->ske);
1757 silc_free(ctx->dest_id);
1758 silc_server_config_unref(&ctx->cconfig);
1759 silc_server_config_unref(&ctx->sconfig);
1760 silc_server_config_unref(&ctx->rconfig);
1762 sock->protocol = NULL;
1765 /* This function is used to read packets from network and send packets to
1766 network. This is usually a generic task. */
1768 SILC_TASK_CALLBACK(silc_server_packet_process)
1770 SilcServer server = (SilcServer)context;
1771 SilcSocketConnection sock = server->sockets[fd];
1772 SilcIDListData idata;
1773 SilcCipher cipher = NULL;
1774 SilcHmac hmac = NULL;
1775 SilcUInt32 sequence = 0;
1779 SILC_LOG_DEBUG(("Unknown socket connection"));
1783 /* Packet sending */
1785 if (type == SILC_TASK_WRITE) {
1786 /* Do not send data to disconnected connection */
1787 if (SILC_IS_DISCONNECTED(sock)) {
1788 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
1792 server->stat.packets_sent++;
1794 /* Send the packet */
1795 ret = silc_packet_send(sock, TRUE);
1797 /* If returned -2 could not write to connection now, will do
1803 SILC_LOG_ERROR(("Error sending packet to connection "
1804 "%s:%d [%s]", sock->hostname, sock->port,
1805 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1806 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1807 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1812 /* The packet has been sent and now it is time to set the connection
1813 back to only for input. When there is again some outgoing data
1814 available for this connection it will be set for output as well.
1815 This call clears the output setting and sets it only for input. */
1816 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1817 SILC_UNSET_OUTBUF_PENDING(sock);
1819 silc_buffer_clear(sock->outbuf);
1823 /* Packet receiving */
1825 /* Read some data from connection */
1826 ret = silc_packet_receive(sock);
1830 SILC_LOG_ERROR(("Error receiving packet from connection "
1831 "%s:%d [%s] %s", sock->hostname, sock->port,
1832 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1833 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1834 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1835 "Router"), strerror(errno)));
1841 SILC_LOG_DEBUG(("Read EOF"));
1843 /* If connection is disconnecting already we will finally
1844 close the connection */
1845 if (SILC_IS_DISCONNECTING(sock)) {
1846 if (sock->user_data)
1847 silc_server_free_sock_user_data(server, sock, NULL);
1848 silc_server_close_connection(server, sock);
1852 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1853 SILC_SET_DISCONNECTING(sock);
1855 if (sock->user_data) {
1857 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1858 silc_server_free_sock_user_data(server, sock, tmp);
1860 silc_server_free_sock_user_data(server, sock, NULL);
1861 } else if (server->router_conn && server->router_conn->sock == sock &&
1862 !server->router && server->standalone)
1863 silc_schedule_task_add(server->schedule, 0,
1864 silc_server_connect_to_router,
1867 SILC_TASK_PRI_NORMAL);
1869 silc_server_close_connection(server, sock);
1873 /* If connection is disconnecting or disconnected we will ignore
1875 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1876 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1880 /* Get keys and stuff from ID entry */
1881 idata = (SilcIDListData)sock->user_data;
1883 cipher = idata->receive_key;
1884 hmac = idata->hmac_receive;
1885 sequence = idata->psn_receive;
1888 /* Process the packet. This will call the parser that will then
1889 decrypt and parse the packet. */
1890 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1891 TRUE : FALSE, cipher, hmac, sequence,
1892 silc_server_packet_parse, server);
1894 /* If this socket connection is not authenticated yet and the packet
1895 processing failed we will drop the connection since it can be
1896 a malicious flooder. */
1897 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1898 (!sock->protocol || sock->protocol->protocol->type ==
1899 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1900 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1901 SILC_SET_DISCONNECTING(sock);
1903 if (sock->user_data)
1904 silc_server_free_sock_user_data(server, sock, NULL);
1905 silc_server_close_connection(server, sock);
1909 /* Parses whole packet, received earlier. */
1911 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1913 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1914 SilcServer server = (SilcServer)parse_ctx->context;
1915 SilcSocketConnection sock = parse_ctx->sock;
1916 SilcPacketContext *packet = parse_ctx->packet;
1917 SilcIDListData idata = (SilcIDListData)sock->user_data;
1920 server->stat.packets_received++;
1922 /* Parse the packet */
1923 if (parse_ctx->normal)
1924 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1926 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1928 /* If entry is disabled ignore what we got. */
1929 if (ret != SILC_PACKET_RESUME_ROUTER &&
1930 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1931 SILC_LOG_DEBUG(("Connection is disabled"));
1935 if (ret == SILC_PACKET_NONE) {
1936 SILC_LOG_DEBUG(("Error parsing packet"));
1940 /* Check that the the current client ID is same as in the client's packet. */
1941 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1942 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1943 if (client && client->id) {
1944 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1945 packet->src_id_type);
1946 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1948 SILC_LOG_DEBUG(("Packet source is not same as sender"));
1955 if (server->server_type == SILC_ROUTER) {
1956 /* Route the packet if it is not destined to us. Other ID types but
1957 server are handled separately after processing them. */
1958 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1959 packet->dst_id_type == SILC_ID_SERVER &&
1960 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1961 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1963 /* Route the packet to fastest route for the destination ID */
1964 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1965 packet->dst_id_type);
1968 silc_server_packet_route(server,
1969 silc_server_route_get(server, id,
1970 packet->dst_id_type),
1977 /* Parse the incoming packet type */
1978 silc_server_packet_parse_type(server, sock, packet);
1980 /* Broadcast packet if it is marked as broadcast packet and it is
1981 originated from router and we are router. */
1982 if (server->server_type == SILC_ROUTER &&
1983 sock->type == SILC_SOCKET_TYPE_ROUTER &&
1984 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1985 /* Broadcast to our primary route */
1986 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
1988 /* If we have backup routers then we need to feed all broadcast
1989 data to those servers. */
1990 silc_server_backup_broadcast(server, sock, packet);
1994 silc_packet_context_free(packet);
1995 silc_free(parse_ctx);
1998 /* Parser callback called by silc_packet_receive_process. This merely
1999 registers timeout that will handle the actual parsing when appropriate. */
2001 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2004 SilcServer server = (SilcServer)context;
2005 SilcSocketConnection sock = parser_context->sock;
2006 SilcIDListData idata = (SilcIDListData)sock->user_data;
2009 idata->psn_receive = parser_context->packet->sequence + 1;
2011 /* If protocol for this connection is key exchange or rekey then we'll
2012 process all packets synchronously, since there might be packets in
2013 queue that we are not able to decrypt without first processing the
2014 packets before them. */
2015 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2016 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2017 (sock->protocol && sock->protocol->protocol &&
2018 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2019 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2020 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2023 /* Reprocess data since we'll return FALSE here. This is because
2024 the idata->receive_key might have become valid in the last packet
2025 and we want to call this processor with valid cipher. */
2027 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2028 TRUE : FALSE, idata->receive_key,
2029 idata->hmac_receive, idata->psn_receive,
2030 silc_server_packet_parse, server);
2032 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2033 TRUE : FALSE, NULL, NULL, 0,
2034 silc_server_packet_parse, server);
2038 switch (sock->type) {
2039 case SILC_SOCKET_TYPE_UNKNOWN:
2040 case SILC_SOCKET_TYPE_CLIENT:
2041 /* Parse the packet with timeout */
2042 silc_schedule_task_add(server->schedule, sock->sock,
2043 silc_server_packet_parse_real,
2044 (void *)parser_context, 0, 100000,
2046 SILC_TASK_PRI_NORMAL);
2048 case SILC_SOCKET_TYPE_SERVER:
2049 case SILC_SOCKET_TYPE_ROUTER:
2050 /* Packets from servers are parsed immediately */
2051 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2061 /* Parses the packet type and calls what ever routines the packet type
2062 requires. This is done for all incoming packets. */
2064 void silc_server_packet_parse_type(SilcServer server,
2065 SilcSocketConnection sock,
2066 SilcPacketContext *packet)
2068 SilcPacketType type = packet->type;
2069 SilcIDListData idata = (SilcIDListData)sock->user_data;
2071 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2072 silc_get_packet_name(type), packet->flags));
2074 /* Parse the packet type */
2076 case SILC_PACKET_DISCONNECT:
2079 char *message = NULL;
2081 if (packet->flags & SILC_PACKET_FLAG_LIST)
2083 if (packet->buffer->len < 1)
2086 status = (SilcStatus)packet->buffer->data[0];
2087 if (packet->buffer->len > 1 &&
2088 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2089 message = silc_memdup(packet->buffer->data + 1,
2090 packet->buffer->len - 1);
2092 SILC_LOG_ERROR(("Disconnected by %s (%s): %s (%d) %s",
2093 sock->ip, sock->hostname,
2094 silc_get_status_message(status), status,
2095 message ? message : ""));
2100 case SILC_PACKET_SUCCESS:
2102 * Success received for something. For now we can have only
2103 * one protocol for connection executing at once hence this
2104 * success message is for whatever protocol is executing currently.
2106 if (packet->flags & SILC_PACKET_FLAG_LIST)
2109 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2112 case SILC_PACKET_FAILURE:
2114 * Failure received for something. For now we can have only
2115 * one protocol for connection executing at once hence this
2116 * failure message is for whatever protocol is executing currently.
2118 if (packet->flags & SILC_PACKET_FLAG_LIST)
2120 if (sock->protocol) {
2121 SilcServerFailureContext f;
2122 f = silc_calloc(1, sizeof(*f));
2126 /* We will wait 5 seconds to process this failure packet */
2127 silc_schedule_task_add(server->schedule, sock->sock,
2128 silc_server_failure_callback, (void *)f, 5, 0,
2129 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2133 case SILC_PACKET_REJECT:
2134 if (packet->flags & SILC_PACKET_FLAG_LIST)
2139 case SILC_PACKET_NOTIFY:
2141 * Received notify packet. Server can receive notify packets from
2142 * router. Server then relays the notify messages to clients if needed.
2144 if (packet->flags & SILC_PACKET_FLAG_LIST)
2145 silc_server_notify_list(server, sock, packet);
2147 silc_server_notify(server, sock, packet);
2153 case SILC_PACKET_CHANNEL_MESSAGE:
2155 * Received channel message. Channel messages are special packets
2156 * (although probably most common ones) thus they are handled
2159 if (packet->flags & SILC_PACKET_FLAG_LIST)
2161 idata->last_receive = time(NULL);
2162 silc_server_channel_message(server, sock, packet);
2165 case SILC_PACKET_CHANNEL_KEY:
2167 * Received key for channel. As channels are created by the router
2168 * the keys are as well. We will distribute the key to all of our
2169 * locally connected clients on the particular channel. Router
2170 * never receives this channel and thus is ignored.
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 if (packet->flags & SILC_PACKET_FLAG_LIST)
2187 silc_server_command_process(server, sock, packet);
2190 case SILC_PACKET_COMMAND_REPLY:
2192 * Received command reply packet. Received command reply to command. It
2193 * may be reply to command sent by us or reply to command sent by client
2194 * that we've routed further.
2196 if (packet->flags & SILC_PACKET_FLAG_LIST)
2198 silc_server_command_reply(server, sock, packet);
2202 * Private Message packets
2204 case SILC_PACKET_PRIVATE_MESSAGE:
2206 * Received private message packet. The packet is coming from either
2209 if (packet->flags & SILC_PACKET_FLAG_LIST)
2211 idata->last_receive = time(NULL);
2212 silc_server_private_message(server, sock, packet);
2215 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2217 * Private message key packet.
2219 if (packet->flags & SILC_PACKET_FLAG_LIST)
2221 silc_server_private_message_key(server, sock, packet);
2225 * Key Exchange protocol packets
2227 case SILC_PACKET_KEY_EXCHANGE:
2228 if (packet->flags & SILC_PACKET_FLAG_LIST)
2231 if (sock->protocol && sock->protocol->protocol &&
2232 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2233 SilcServerKEInternalContext *proto_ctx =
2234 (SilcServerKEInternalContext *)sock->protocol->context;
2236 proto_ctx->packet = silc_packet_context_dup(packet);
2238 /* Let the protocol handle the packet */
2239 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2241 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2242 "protocol active, packet dropped."));
2246 case SILC_PACKET_KEY_EXCHANGE_1:
2247 if (packet->flags & SILC_PACKET_FLAG_LIST)
2250 if (sock->protocol && sock->protocol->protocol &&
2251 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2252 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2254 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2255 SilcServerRekeyInternalContext *proto_ctx =
2256 (SilcServerRekeyInternalContext *)sock->protocol->context;
2258 if (proto_ctx->packet)
2259 silc_packet_context_free(proto_ctx->packet);
2261 proto_ctx->packet = silc_packet_context_dup(packet);
2263 /* Let the protocol handle the packet */
2264 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2266 SilcServerKEInternalContext *proto_ctx =
2267 (SilcServerKEInternalContext *)sock->protocol->context;
2269 if (proto_ctx->packet)
2270 silc_packet_context_free(proto_ctx->packet);
2272 proto_ctx->packet = silc_packet_context_dup(packet);
2273 proto_ctx->dest_id_type = packet->src_id_type;
2274 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2275 packet->src_id_type);
2276 if (!proto_ctx->dest_id)
2279 /* Let the protocol handle the packet */
2280 silc_protocol_execute(sock->protocol, server->schedule,
2284 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2285 "protocol active, packet dropped."));
2289 case SILC_PACKET_KEY_EXCHANGE_2:
2290 if (packet->flags & SILC_PACKET_FLAG_LIST)
2293 if (sock->protocol && sock->protocol->protocol &&
2294 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2295 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2297 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2298 SilcServerRekeyInternalContext *proto_ctx =
2299 (SilcServerRekeyInternalContext *)sock->protocol->context;
2301 if (proto_ctx->packet)
2302 silc_packet_context_free(proto_ctx->packet);
2304 proto_ctx->packet = silc_packet_context_dup(packet);
2306 /* Let the protocol handle the packet */
2307 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2309 SilcServerKEInternalContext *proto_ctx =
2310 (SilcServerKEInternalContext *)sock->protocol->context;
2312 if (proto_ctx->packet)
2313 silc_packet_context_free(proto_ctx->packet);
2315 proto_ctx->packet = silc_packet_context_dup(packet);
2316 proto_ctx->dest_id_type = packet->src_id_type;
2317 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2318 packet->src_id_type);
2319 if (!proto_ctx->dest_id)
2322 /* Let the protocol handle the packet */
2323 silc_protocol_execute(sock->protocol, server->schedule,
2327 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2328 "protocol active, packet dropped."));
2332 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2334 * Connection authentication request packet. When we receive this packet
2335 * we will send to the other end information about our mandatory
2336 * authentication method for the connection. This packet maybe received
2339 if (packet->flags & SILC_PACKET_FLAG_LIST)
2341 silc_server_connection_auth_request(server, sock, packet);
2345 * Connection Authentication protocol packets
2347 case SILC_PACKET_CONNECTION_AUTH:
2348 /* Start of the authentication protocol. We receive here the
2349 authentication data and will verify it. */
2350 if (packet->flags & SILC_PACKET_FLAG_LIST)
2353 if (sock->protocol && sock->protocol->protocol->type
2354 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2356 SilcServerConnAuthInternalContext *proto_ctx =
2357 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2359 proto_ctx->packet = silc_packet_context_dup(packet);
2361 /* Let the protocol handle the packet */
2362 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2364 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2365 "protocol active, packet dropped."));
2369 case SILC_PACKET_NEW_ID:
2371 * Received New ID packet. This includes some new ID that has been
2372 * created. It may be for client, server or channel. This is the way
2373 * to distribute information about new registered entities in the
2376 if (packet->flags & SILC_PACKET_FLAG_LIST)
2377 silc_server_new_id_list(server, sock, packet);
2379 silc_server_new_id(server, sock, packet);
2382 case SILC_PACKET_NEW_CLIENT:
2384 * Received new client packet. This includes client information that
2385 * we will use to create initial client ID. After creating new
2386 * ID we will send it to the client.
2388 if (packet->flags & SILC_PACKET_FLAG_LIST)
2390 silc_server_new_client(server, sock, packet);
2393 case SILC_PACKET_NEW_SERVER:
2395 * Received new server packet. This includes Server ID and some other
2396 * information that we may save. This is received after server has
2399 if (packet->flags & SILC_PACKET_FLAG_LIST)
2401 silc_server_new_server(server, sock, packet);
2404 case SILC_PACKET_NEW_CHANNEL:
2406 * Received new channel packet. Information about new channel in the
2407 * network are distributed using this packet.
2409 if (packet->flags & SILC_PACKET_FLAG_LIST)
2410 silc_server_new_channel_list(server, sock, packet);
2412 silc_server_new_channel(server, sock, packet);
2415 case SILC_PACKET_HEARTBEAT:
2417 * Received heartbeat.
2419 if (packet->flags & SILC_PACKET_FLAG_LIST)
2423 case SILC_PACKET_KEY_AGREEMENT:
2425 * Received heartbeat.
2427 if (packet->flags & SILC_PACKET_FLAG_LIST)
2429 silc_server_key_agreement(server, sock, packet);
2432 case SILC_PACKET_REKEY:
2434 * Received re-key packet. The sender wants to regenerate the session
2437 if (packet->flags & SILC_PACKET_FLAG_LIST)
2439 silc_server_rekey(server, sock, packet);
2442 case SILC_PACKET_REKEY_DONE:
2444 * The re-key is done.
2446 if (packet->flags & SILC_PACKET_FLAG_LIST)
2449 if (sock->protocol && sock->protocol->protocol &&
2450 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2452 SilcServerRekeyInternalContext *proto_ctx =
2453 (SilcServerRekeyInternalContext *)sock->protocol->context;
2455 if (proto_ctx->packet)
2456 silc_packet_context_free(proto_ctx->packet);
2458 proto_ctx->packet = silc_packet_context_dup(packet);
2460 /* Let the protocol handle the packet */
2461 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2463 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2464 "protocol active, packet dropped."));
2468 case SILC_PACKET_FTP:
2470 if (packet->flags & SILC_PACKET_FLAG_LIST)
2472 silc_server_ftp(server, sock, packet);
2475 case SILC_PACKET_RESUME_CLIENT:
2477 if (packet->flags & SILC_PACKET_FLAG_LIST)
2479 silc_server_resume_client(server, sock, packet);
2482 case SILC_PACKET_RESUME_ROUTER:
2483 /* Resume router packet received. This packet is received for backup
2484 router resuming protocol. */
2485 if (packet->flags & SILC_PACKET_FLAG_LIST)
2487 silc_server_backup_resume_router(server, sock, packet);
2491 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2496 /* Creates connection to a remote router. */
2498 void silc_server_create_connection(SilcServer server,
2499 const char *remote_host, SilcUInt32 port)
2501 SilcServerConnection sconn;
2503 /* Allocate connection object for hold connection specific stuff. */
2504 sconn = silc_calloc(1, sizeof(*sconn));
2505 sconn->server = server;
2506 sconn->remote_host = strdup(remote_host);
2507 sconn->remote_port = port;
2508 sconn->no_reconnect = TRUE;
2510 silc_schedule_task_add(server->schedule, 0,
2511 silc_server_connect_router,
2512 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2513 SILC_TASK_PRI_NORMAL);
2516 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2518 silc_socket_free((SilcSocketConnection)context);
2521 /* Closes connection to socket connection */
2523 void silc_server_close_connection(SilcServer server,
2524 SilcSocketConnection sock)
2526 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2527 silc_socket_free(sock);
2531 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2533 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2534 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2535 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2538 /* We won't listen for this connection anymore */
2539 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2541 /* Unregister all tasks */
2542 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2544 /* Close the actual connection */
2545 silc_net_close_connection(sock->sock);
2546 server->sockets[sock->sock] = NULL;
2548 /* If sock->user_data is NULL then we'll check for active protocols
2549 here since the silc_server_free_sock_user_data has not been called
2550 for this connection. */
2551 if (!sock->user_data) {
2552 /* If any protocol is active cancel its execution. It will call
2553 the final callback which will finalize the disconnection. */
2554 if (sock->protocol) {
2555 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2556 silc_protocol_cancel(sock->protocol, server->schedule);
2557 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2558 silc_protocol_execute_final(sock->protocol, server->schedule);
2559 sock->protocol = NULL;
2564 silc_schedule_task_add(server->schedule, 0,
2565 silc_server_close_connection_final,
2566 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2567 SILC_TASK_PRI_NORMAL);
2570 /* Sends disconnect message to remote connection and disconnects the
2573 void silc_server_disconnect_remote(SilcServer server,
2574 SilcSocketConnection sock,
2575 SilcStatus status, ...)
2578 unsigned char buf[512];
2586 memset(buf, 0, sizeof(buf));
2587 va_start(ap, status);
2588 cp = va_arg(ap, char *);
2590 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2595 SILC_LOG_DEBUG(("Disconnecting remote host"));
2597 /* Notify remote end that the conversation is over. The notify message
2598 is tried to be sent immediately. */
2602 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2604 buffer = silc_buffer_alloc_size(len);
2608 buffer->data[0] = status;
2610 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2612 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2613 buffer->data, buffer->len, TRUE);
2614 silc_buffer_free(buffer);
2617 silc_server_packet_queue_purge(server, sock);
2619 /* Mark the connection to be disconnected */
2620 SILC_SET_DISCONNECTED(sock);
2621 silc_server_close_connection(server, sock);
2626 SilcClientEntry client;
2627 } *FreeClientInternal;
2629 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2631 FreeClientInternal i = (FreeClientInternal)context;
2633 silc_idlist_del_data(i->client);
2634 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2638 /* Frees client data and notifies about client's signoff. */
2640 void silc_server_free_client_data(SilcServer server,
2641 SilcSocketConnection sock,
2642 SilcClientEntry client,
2644 const char *signoff)
2646 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2648 SILC_LOG_DEBUG(("Freeing client data"));
2651 if (!client->router && !client->connection &&
2652 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2653 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2654 SILC_LOG_ERROR(("****** Contact Pekka"));
2655 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2660 /* If there is pending outgoing data for the client then purge it
2661 to the network before removing the client entry. */
2662 silc_server_packet_queue_purge(server, sock);
2665 /* Check if anyone is watching this nickname */
2666 if (server->server_type == SILC_ROUTER)
2667 silc_server_check_watcher_list(server, client, NULL,
2668 SILC_NOTIFY_TYPE_SIGNOFF);
2670 /* Send SIGNOFF notify to routers. */
2672 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2673 SILC_BROADCAST(server), client->id,
2677 /* Remove client from all channels */
2679 silc_server_remove_from_channels(server, NULL, client,
2680 TRUE, (char *)signoff, TRUE);
2682 silc_server_remove_from_channels(server, NULL, client,
2683 FALSE, NULL, FALSE);
2685 /* Remove this client from watcher list if it is */
2686 silc_server_del_from_watcher_list(server, client);
2688 /* Update statistics */
2689 server->stat.my_clients--;
2690 server->stat.clients--;
2691 if (server->stat.cell_clients)
2692 server->stat.cell_clients--;
2693 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2694 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2695 silc_schedule_task_del_by_context(server->schedule, client);
2697 /* We will not delete the client entry right away. We will take it
2698 into history (for WHOWAS command) for 5 minutes */
2701 silc_schedule_task_add(server->schedule, 0,
2702 silc_server_free_client_data_timeout,
2704 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2705 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2707 client->router = NULL;
2708 client->connection = NULL;
2711 /* Frees user_data pointer from socket connection object. This also sends
2712 appropriate notify packets to the network to inform about leaving
2715 void silc_server_free_sock_user_data(SilcServer server,
2716 SilcSocketConnection sock,
2717 const char *signoff_message)
2719 switch (sock->type) {
2720 case SILC_SOCKET_TYPE_CLIENT:
2722 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2723 silc_server_free_client_data(server, sock, user_data, TRUE,
2727 case SILC_SOCKET_TYPE_SERVER:
2728 case SILC_SOCKET_TYPE_ROUTER:
2730 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2731 SilcServerEntry backup_router = NULL;
2733 SILC_LOG_DEBUG(("Freeing server data"));
2736 backup_router = silc_server_backup_get(server, user_data->id);
2738 /* If this was our primary router connection then we're lost to
2739 the outside world. */
2740 if (server->router == user_data) {
2741 /* Check whether we have a backup router connection */
2742 if (!backup_router || backup_router == user_data) {
2743 silc_schedule_task_add(server->schedule, 0,
2744 silc_server_connect_to_router,
2747 SILC_TASK_PRI_NORMAL);
2749 server->id_entry->router = NULL;
2750 server->router = NULL;
2751 server->standalone = TRUE;
2752 backup_router = NULL;
2754 SILC_LOG_INFO(("New primary router is backup router %s",
2755 backup_router->server_name));
2756 SILC_LOG_DEBUG(("New primary router is backup router %s",
2757 backup_router->server_name));
2758 #ifdef BACKUP_SINGLE_ROUTER
2759 if (server->id_entry != backup_router) {
2760 #endif /* BACKUP_SINGLE_ROUTER */
2761 server->id_entry->router = backup_router;
2762 server->router = backup_router;
2763 server->router_connect = time(0);
2764 server->backup_primary = TRUE;
2765 #ifdef BACKUP_SINGLE_ROUTER
2767 server->id_entry->router = NULL;
2768 server->router = NULL;
2769 server->standalone = TRUE;
2771 #endif /* BACKUP_SINGLE_ROUTER */
2773 if (server->server_type == SILC_BACKUP_ROUTER) {
2774 server->server_type = SILC_ROUTER;
2776 /* We'll need to constantly try to reconnect to the primary
2777 router so that we'll see when it comes back online. */
2778 silc_server_backup_reconnect(server, sock->ip, sock->port,
2779 silc_server_backup_connected,
2783 /* Mark this connection as replaced */
2784 silc_server_backup_replaced_add(server, user_data->id,
2787 } else if (backup_router) {
2788 SILC_LOG_INFO(("Enabling the use of backup router %s",
2789 backup_router->server_name));
2790 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2791 backup_router->server_name));
2793 /* Mark this connection as replaced */
2794 silc_server_backup_replaced_add(server, user_data->id,
2798 if (!backup_router) {
2799 /* Free all client entries that this server owns as they will
2800 become invalid now as well. */
2802 silc_server_remove_clients_by_server(server, user_data, TRUE);
2803 if (server->server_type == SILC_SERVER)
2804 silc_server_remove_channels_by_server(server, user_data);
2806 /* Update the client entries of this server to the new backup
2807 router. This also removes the clients that *really* was owned
2808 by the primary router and went down with the router. */
2809 silc_server_update_clients_by_server(server, user_data, backup_router,
2811 silc_server_update_servers_by_server(server, user_data, backup_router);
2812 if (server->server_type == SILC_SERVER)
2813 silc_server_update_channels_by_server(server, user_data,
2817 /* Free the server entry */
2818 silc_server_backup_del(server, user_data);
2819 silc_server_backup_replaced_del(server, user_data);
2820 silc_idlist_del_data(user_data);
2821 if (!silc_idlist_del_server(server->local_list, user_data))
2822 silc_idlist_del_server(server->global_list, user_data);
2823 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
2824 server->stat.my_servers--;
2826 server->stat.my_routers--;
2827 server->stat.routers--;
2829 server->stat.servers--;
2830 if (server->server_type == SILC_ROUTER)
2831 server->stat.cell_servers--;
2833 if (backup_router) {
2834 /* Announce all of our stuff that was created about 5 minutes ago.
2835 The backup router knows all the other stuff already. */
2836 if (server->server_type == SILC_ROUTER)
2837 silc_server_announce_servers(server, FALSE, time(0) - 300,
2838 backup_router->connection);
2840 /* Announce our clients and channels to the router */
2841 silc_server_announce_clients(server, time(0) - 300,
2842 backup_router->connection);
2843 silc_server_announce_channels(server, time(0) - 300,
2844 backup_router->connection);
2850 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2852 SILC_LOG_DEBUG(("Freeing unknown connection data"));
2854 silc_idlist_del_data(user_data);
2855 silc_free(user_data);
2860 /* If any protocol is active cancel its execution */
2861 if (sock->protocol) {
2862 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2863 silc_protocol_cancel(sock->protocol, server->schedule);
2864 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2865 silc_protocol_execute_final(sock->protocol, server->schedule);
2866 sock->protocol = NULL;
2869 sock->user_data = NULL;
2872 /* Removes client from all channels it has joined. This is used when client
2873 connection is disconnected. If the client on a channel is last, the
2874 channel is removed as well. This sends the SIGNOFF notify types. */
2876 void silc_server_remove_from_channels(SilcServer server,
2877 SilcSocketConnection sock,
2878 SilcClientEntry client,
2880 const char *signoff_message,
2883 SilcChannelEntry channel;
2884 SilcChannelClientEntry chl;
2885 SilcHashTableList htl;
2886 SilcBuffer clidp = NULL;
2891 SILC_LOG_DEBUG(("Removing client from joined channels"));
2893 if (notify && !client->id)
2897 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2902 /* Remove the client from all channels. The client is removed from
2903 the channels' user list. */
2904 silc_hash_table_list(client->channels, &htl);
2905 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2906 channel = chl->channel;
2908 /* Remove channel if this is last client leaving the channel, unless
2909 the channel is permanent. */
2910 if (server->server_type == SILC_ROUTER &&
2911 silc_hash_table_count(channel->user_list) < 2) {
2912 silc_server_channel_delete(server, channel);
2916 silc_hash_table_del(client->channels, channel);
2917 silc_hash_table_del(channel->user_list, chl->client);
2918 channel->user_count--;
2920 /* If there is no global users on the channel anymore mark the channel
2921 as local channel. Do not check if the removed client is local client. */
2922 if (server->server_type != SILC_ROUTER && channel->global_users &&
2923 chl->client->router && !silc_server_channel_has_global(channel))
2924 channel->global_users = FALSE;
2928 /* Update statistics */
2929 if (SILC_IS_LOCAL(client))
2930 server->stat.my_chanclients--;
2931 if (server->server_type == SILC_ROUTER) {
2932 server->stat.cell_chanclients--;
2933 server->stat.chanclients--;
2936 /* If there is not at least one local user on the channel then we don't
2937 need the channel entry anymore, we can remove it safely, unless the
2938 channel is permanent channel */
2939 if (server->server_type != SILC_ROUTER &&
2940 !silc_server_channel_has_local(channel)) {
2941 /* Notify about leaving client if this channel has global users. */
2942 if (notify && channel->global_users)
2943 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2944 SILC_NOTIFY_TYPE_SIGNOFF,
2945 signoff_message ? 2 : 1,
2946 clidp->data, clidp->len,
2947 signoff_message, signoff_message ?
2948 strlen(signoff_message) : 0);
2950 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2951 silc_server_channel_delete(server, channel);
2955 /* Send notify to channel about client leaving SILC and channel too */
2957 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2958 SILC_NOTIFY_TYPE_SIGNOFF,
2959 signoff_message ? 2 : 1,
2960 clidp->data, clidp->len,
2961 signoff_message, signoff_message ?
2962 strlen(signoff_message) : 0);
2964 /* Re-generate channel key if needed */
2965 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2966 if (!silc_server_create_channel_key(server, channel, 0))
2969 /* Send the channel key to the channel. The key of course is not sent
2970 to the client who was removed from the channel. */
2971 silc_server_send_channel_key(server, client->connection, channel,
2972 server->server_type == SILC_ROUTER ?
2973 FALSE : !server->standalone);
2977 silc_hash_table_list_reset(&htl);
2979 silc_buffer_free(clidp);
2982 /* Removes client from one channel. This is used for example when client
2983 calls LEAVE command to remove itself from the channel. Returns TRUE
2984 if channel still exists and FALSE if the channel is removed when
2985 last client leaves the channel. If `notify' is FALSE notify messages
2988 bool silc_server_remove_from_one_channel(SilcServer server,
2989 SilcSocketConnection sock,
2990 SilcChannelEntry channel,
2991 SilcClientEntry client,
2994 SilcChannelClientEntry chl;
2997 SILC_LOG_DEBUG(("Removing %s from channel %s",
2998 silc_id_render(client->id, SILC_ID_CLIENT),
2999 channel->channel_name));
3001 /* Get the entry to the channel, if this client is not on the channel
3003 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3006 /* Remove channel if this is last client leaving the channel, unless
3007 the channel is permanent. */
3008 if (server->server_type == SILC_ROUTER &&
3009 silc_hash_table_count(channel->user_list) < 2) {
3010 silc_server_channel_delete(server, channel);
3014 silc_hash_table_del(client->channels, chl->channel);
3015 silc_hash_table_del(channel->user_list, chl->client);
3016 channel->user_count--;
3018 /* If there is no global users on the channel anymore mark the channel
3019 as local channel. Do not check if the client is local client. */
3020 if (server->server_type != SILC_ROUTER && channel->global_users &&
3021 chl->client->router && !silc_server_channel_has_global(channel))
3022 channel->global_users = FALSE;
3026 /* Update statistics */
3027 if (SILC_IS_LOCAL(client))
3028 server->stat.my_chanclients--;
3029 if (server->server_type == SILC_ROUTER) {
3030 server->stat.cell_chanclients--;
3031 server->stat.chanclients--;
3034 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3038 /* If there is not at least one local user on the channel then we don't
3039 need the channel entry anymore, we can remove it safely, unless the
3040 channel is permanent channel */
3041 if (server->server_type != SILC_ROUTER &&
3042 !silc_server_channel_has_local(channel)) {
3043 /* Notify about leaving client if this channel has global users. */
3044 if (notify && channel->global_users)
3045 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3046 SILC_NOTIFY_TYPE_LEAVE, 1,
3047 clidp->data, clidp->len);
3049 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3050 silc_server_channel_delete(server, channel);
3051 silc_buffer_free(clidp);
3055 /* Send notify to channel about client leaving the channel */
3057 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3058 SILC_NOTIFY_TYPE_LEAVE, 1,
3059 clidp->data, clidp->len);
3061 silc_buffer_free(clidp);
3065 /* Timeout callback. This is called if connection is idle or for some
3066 other reason is not responding within some period of time. This
3067 disconnects the remote end. */
3069 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3071 SilcServer server = (SilcServer)context;
3072 SilcSocketConnection sock = server->sockets[fd];
3073 SilcProtocolType protocol = 0;
3075 SILC_LOG_DEBUG(("Start"));
3080 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3081 sock->hostname, sock->ip));
3083 /* If we have protocol active we must assure that we call the protocol's
3084 final callback so that all the memory is freed. */
3085 if (sock->protocol) {
3086 protocol = sock->protocol->protocol->type;
3087 silc_protocol_cancel(sock->protocol, server->schedule);
3088 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3089 silc_protocol_execute_final(sock->protocol, server->schedule);
3090 sock->protocol = NULL;
3094 if (sock->user_data)
3095 silc_server_free_sock_user_data(server, sock, NULL);
3097 silc_server_disconnect_remote(server, sock,
3099 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3100 SILC_STATUS_ERR_AUTH_FAILED :
3101 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3102 "Connection timeout");
3105 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3106 function may be used only by router. In real SILC network all channels
3107 are created by routers thus this function is never used by normal
3110 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3111 SilcServerID *router_id,
3117 SilcChannelID *channel_id;
3118 SilcChannelEntry entry;
3122 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3125 cipher = SILC_DEFAULT_CIPHER;
3127 hmac = SILC_DEFAULT_HMAC;
3129 /* Allocate cipher */
3130 if (!silc_cipher_alloc(cipher, &key))
3134 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3135 silc_cipher_free(key);
3139 channel_name = strdup(channel_name);
3141 /* Create the channel ID */
3142 if (!silc_id_create_channel_id(server, router_id, server->rng,
3144 silc_free(channel_name);
3145 silc_cipher_free(key);
3146 silc_hmac_free(newhmac);
3150 /* Create the channel */
3151 entry = silc_idlist_add_channel(server->local_list, channel_name,
3152 SILC_CHANNEL_MODE_NONE, channel_id,
3153 NULL, key, newhmac, 0);
3155 silc_free(channel_name);
3156 silc_cipher_free(key);
3157 silc_hmac_free(newhmac);
3158 silc_free(channel_id);
3162 entry->cipher = strdup(cipher);
3163 entry->hmac_name = strdup(hmac);
3165 /* Now create the actual key material */
3166 if (!silc_server_create_channel_key(server, entry,
3167 silc_cipher_get_key_len(key) / 8)) {
3168 silc_idlist_del_channel(server->local_list, entry);
3172 /* Notify other routers about the new channel. We send the packet
3173 to our primary route. */
3175 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3176 channel_name, entry->id,
3177 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3180 /* Distribute to backup routers */
3181 if (broadcast && server->server_type == SILC_ROUTER) {
3184 SilcUInt32 name_len = strlen(channel_name);
3185 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3186 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3188 packet = silc_channel_payload_encode(channel_name, name_len,
3189 cid, channel_id_len, entry->mode);
3190 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3191 packet->data, packet->len, FALSE, TRUE);
3193 silc_buffer_free(packet);
3196 server->stat.my_channels++;
3197 if (server->server_type == SILC_ROUTER) {
3198 server->stat.channels++;
3199 server->stat.cell_channels++;
3200 entry->users_resolved = TRUE;
3206 /* Same as above but creates the channel with Channel ID `channel_id. */
3209 silc_server_create_new_channel_with_id(SilcServer server,
3213 SilcChannelID *channel_id,
3216 SilcChannelEntry entry;
3220 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3223 cipher = SILC_DEFAULT_CIPHER;
3225 hmac = SILC_DEFAULT_HMAC;
3227 /* Allocate cipher */
3228 if (!silc_cipher_alloc(cipher, &key))
3232 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3233 silc_cipher_free(key);
3237 channel_name = strdup(channel_name);
3239 /* Create the channel */
3240 entry = silc_idlist_add_channel(server->local_list, channel_name,
3241 SILC_CHANNEL_MODE_NONE, channel_id,
3242 NULL, key, newhmac, 0);
3244 silc_cipher_free(key);
3245 silc_hmac_free(newhmac);
3246 silc_free(channel_name);
3250 /* Now create the actual key material */
3251 if (!silc_server_create_channel_key(server, entry,
3252 silc_cipher_get_key_len(key) / 8)) {
3253 silc_idlist_del_channel(server->local_list, entry);
3257 /* Notify other routers about the new channel. We send the packet
3258 to our primary route. */
3260 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3261 channel_name, entry->id,
3262 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3265 /* Distribute to backup routers */
3266 if (broadcast && server->server_type == SILC_ROUTER) {
3269 SilcUInt32 name_len = strlen(channel_name);
3270 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3271 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3273 packet = silc_channel_payload_encode(channel_name, name_len,
3274 cid, channel_id_len, entry->mode);
3275 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3276 packet->data, packet->len, FALSE, TRUE);
3278 silc_buffer_free(packet);
3281 server->stat.my_channels++;
3282 if (server->server_type == SILC_ROUTER) {
3283 server->stat.channels++;
3284 server->stat.cell_channels++;
3285 entry->users_resolved = TRUE;
3291 /* Channel's key re-key timeout callback. */
3293 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3295 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3296 SilcServer server = (SilcServer)rekey->context;
3300 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3303 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3306 /* Generates new channel key. This is used to create the initial channel key
3307 but also to re-generate new key for channel. If `key_len' is provided
3308 it is the bytes of the key length. */
3310 bool silc_server_create_channel_key(SilcServer server,
3311 SilcChannelEntry channel,
3315 unsigned char channel_key[32], hash[32];
3318 SILC_LOG_DEBUG(("Generating channel key"));
3320 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3321 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3325 if (!channel->channel_key)
3326 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3327 channel->channel_key = NULL;
3333 else if (channel->key_len)
3334 len = channel->key_len / 8;
3336 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3338 /* Create channel key */
3339 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3342 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3344 /* Remove old key if exists */
3346 memset(channel->key, 0, channel->key_len / 8);
3347 silc_free(channel->key);
3351 channel->key_len = len * 8;
3352 channel->key = silc_memdup(channel_key, len);
3353 memset(channel_key, 0, sizeof(channel_key));
3355 /* Generate HMAC key from the channel key data and set it */
3357 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3358 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3359 silc_hmac_set_key(channel->hmac, hash,
3360 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3361 memset(hash, 0, sizeof(hash));
3363 if (server->server_type == SILC_ROUTER) {
3364 if (!channel->rekey)
3365 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3366 channel->rekey->context = (void *)server;
3367 channel->rekey->channel = channel;
3368 channel->rekey->key_len = key_len;
3369 if (channel->rekey->task)
3370 silc_schedule_task_del(server->schedule, channel->rekey->task);
3372 channel->rekey->task =
3373 silc_schedule_task_add(server->schedule, 0,
3374 silc_server_channel_key_rekey,
3375 (void *)channel->rekey,
3376 server->config->channel_rekey_secs, 0,
3378 SILC_TASK_PRI_NORMAL);
3384 /* Saves the channel key found in the encoded `key_payload' buffer. This
3385 function is used when we receive Channel Key Payload and also when we're
3386 processing JOIN command reply. Returns entry to the channel. */
3388 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3389 SilcBuffer key_payload,
3390 SilcChannelEntry channel)
3392 SilcChannelKeyPayload payload = NULL;
3393 SilcChannelID *id = NULL;
3394 unsigned char *tmp, hash[32];
3398 SILC_LOG_DEBUG(("Saving new channel key"));
3400 /* Decode channel key payload */
3401 payload = silc_channel_key_payload_parse(key_payload->data,
3404 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3409 /* Get the channel entry */
3412 /* Get channel ID */
3413 tmp = silc_channel_key_get_id(payload, &tmp_len);
3414 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3420 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3422 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3424 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3425 silc_id_render(id, SILC_ID_CHANNEL)));
3431 tmp = silc_channel_key_get_key(payload, &tmp_len);
3437 cipher = silc_channel_key_get_cipher(payload, NULL);
3443 /* Remove old key if exists */
3445 memset(channel->key, 0, channel->key_len / 8);
3446 silc_free(channel->key);
3447 silc_cipher_free(channel->channel_key);
3450 /* Create new cipher */
3451 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3452 channel->channel_key = NULL;
3457 if (channel->cipher)
3458 silc_free(channel->cipher);
3459 channel->cipher = strdup(cipher);
3462 channel->key_len = tmp_len * 8;
3463 channel->key = silc_memdup(tmp, tmp_len);
3464 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3466 /* Generate HMAC key from the channel key data and set it */
3468 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3469 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3470 silc_hmac_set_key(channel->hmac, hash,
3471 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3473 memset(hash, 0, sizeof(hash));
3474 memset(tmp, 0, tmp_len);
3476 if (server->server_type == SILC_ROUTER) {
3477 if (!channel->rekey)
3478 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3479 channel->rekey->context = (void *)server;
3480 channel->rekey->channel = channel;
3481 if (channel->rekey->task)
3482 silc_schedule_task_del(server->schedule, channel->rekey->task);
3484 channel->rekey->task =
3485 silc_schedule_task_add(server->schedule, 0,
3486 silc_server_channel_key_rekey,
3487 (void *)channel->rekey,
3488 server->config->channel_rekey_secs, 0,
3490 SILC_TASK_PRI_NORMAL);
3496 silc_channel_key_payload_free(payload);
3501 /* Heartbeat callback. This function is set as argument for the
3502 silc_socket_set_heartbeat function. The library will call this function
3503 at the set time interval. */
3505 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3508 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3510 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3512 /* Send the heartbeat */
3513 silc_server_send_heartbeat(hb->server, sock);
3516 /* Returns assembled of all servers in the given ID list. The packet's
3517 form is dictated by the New ID payload. */
3519 static void silc_server_announce_get_servers(SilcServer server,
3520 SilcServerEntry remote,
3522 SilcBuffer *servers,
3523 unsigned long creation_time)
3525 SilcIDCacheList list;
3526 SilcIDCacheEntry id_cache;
3527 SilcServerEntry entry;
3530 /* Go through all clients in the list */
3531 if (silc_idcache_get_all(id_list->servers, &list)) {
3532 if (silc_idcache_list_first(list, &id_cache)) {
3534 entry = (SilcServerEntry)id_cache->context;
3536 /* Do not announce the one we've sending our announcements and
3537 do not announce ourself. Also check the creation time if it's
3539 if ((entry == remote) || (entry == server->id_entry) ||
3540 (creation_time && entry->data.created < creation_time)) {
3541 if (!silc_idcache_list_next(list, &id_cache))
3546 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3548 *servers = silc_buffer_realloc(*servers,
3550 (*servers)->truelen + idp->len :
3552 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3553 silc_buffer_put(*servers, idp->data, idp->len);
3554 silc_buffer_pull(*servers, idp->len);
3555 silc_buffer_free(idp);
3557 if (!silc_idcache_list_next(list, &id_cache))
3562 silc_idcache_list_free(list);
3567 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3573 p = silc_notify_payload_encode(notify, argc, ap);
3579 /* This function is used by router to announce existing servers to our
3580 primary router when we've connected to it. If `creation_time' is non-zero
3581 then only the servers that has been created after the `creation_time'
3582 will be announced. */
3584 void silc_server_announce_servers(SilcServer server, bool global,
3585 unsigned long creation_time,
3586 SilcSocketConnection remote)
3588 SilcBuffer servers = NULL;
3590 SILC_LOG_DEBUG(("Announcing servers"));
3592 /* Get servers in local list */
3593 silc_server_announce_get_servers(server, remote->user_data,
3594 server->local_list, &servers,
3598 /* Get servers in global list */
3599 silc_server_announce_get_servers(server, remote->user_data,
3600 server->global_list, &servers,
3604 silc_buffer_push(servers, servers->data - servers->head);
3605 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3607 /* Send the packet */
3608 silc_server_packet_send(server, remote,
3609 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3610 servers->data, servers->len, TRUE);
3612 silc_buffer_free(servers);
3616 /* Returns assembled packet of all clients in the given ID list. The
3617 packet's form is dictated by the New ID Payload. */
3619 static void silc_server_announce_get_clients(SilcServer server,
3621 SilcBuffer *clients,
3623 unsigned long creation_time)
3625 SilcIDCacheList list;
3626 SilcIDCacheEntry id_cache;
3627 SilcClientEntry client;
3630 unsigned char mode[4];
3632 /* Go through all clients in the list */
3633 if (silc_idcache_get_all(id_list->clients, &list)) {
3634 if (silc_idcache_list_first(list, &id_cache)) {
3636 client = (SilcClientEntry)id_cache->context;
3638 if (creation_time && client->data.created < creation_time) {
3639 if (!silc_idcache_list_next(list, &id_cache))
3644 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3646 *clients = silc_buffer_realloc(*clients,
3648 (*clients)->truelen + idp->len :
3650 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3651 silc_buffer_put(*clients, idp->data, idp->len);
3652 silc_buffer_pull(*clients, idp->len);
3654 SILC_PUT32_MSB(client->mode, mode);
3655 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3656 2, idp->data, idp->len,
3658 *umodes = silc_buffer_realloc(*umodes,
3660 (*umodes)->truelen + tmp->len :
3662 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3663 silc_buffer_put(*umodes, tmp->data, tmp->len);
3664 silc_buffer_pull(*umodes, tmp->len);
3665 silc_buffer_free(tmp);
3667 silc_buffer_free(idp);
3669 if (!silc_idcache_list_next(list, &id_cache))
3674 silc_idcache_list_free(list);
3678 /* This function is used to announce our existing clients to our router
3679 when we've connected to it. If `creation_time' is non-zero then only
3680 the clients that has been created after the `creation_time' will be
3683 void silc_server_announce_clients(SilcServer server,
3684 unsigned long creation_time,
3685 SilcSocketConnection remote)
3687 SilcBuffer clients = NULL;
3688 SilcBuffer umodes = NULL;
3690 SILC_LOG_DEBUG(("Announcing clients"));
3692 /* Get clients in local list */
3693 silc_server_announce_get_clients(server, server->local_list,
3694 &clients, &umodes, creation_time);
3696 /* As router we announce our global list as well */
3697 if (server->server_type == SILC_ROUTER)
3698 silc_server_announce_get_clients(server, server->global_list,
3699 &clients, &umodes, creation_time);
3702 silc_buffer_push(clients, clients->data - clients->head);
3703 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3705 /* Send the packet */
3706 silc_server_packet_send(server, remote,
3707 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3708 clients->data, clients->len, TRUE);
3710 silc_buffer_free(clients);
3714 silc_buffer_push(umodes, umodes->data - umodes->head);
3715 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3717 /* Send the packet */
3718 silc_server_packet_send(server, remote,
3719 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3720 umodes->data, umodes->len, TRUE);
3722 silc_buffer_free(umodes);
3726 /* Returns channel's topic for announcing it */
3728 void silc_server_announce_get_channel_topic(SilcServer server,
3729 SilcChannelEntry channel,
3734 if (channel->topic) {
3735 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3736 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3737 chidp->data, chidp->len,
3739 strlen(channel->topic));
3740 silc_buffer_free(chidp);
3744 /* Returns assembled packets for channel users of the `channel'. */
3746 void silc_server_announce_get_channel_users(SilcServer server,
3747 SilcChannelEntry channel,
3748 SilcBuffer *channel_modes,
3749 SilcBuffer *channel_users,
3750 SilcBuffer *channel_users_modes)
3752 SilcChannelClientEntry chl;
3753 SilcHashTableList htl;
3754 SilcBuffer chidp, clidp, csidp;
3757 unsigned char mode[4], *fkey = NULL;
3758 SilcUInt32 fkey_len = 0;
3761 SILC_LOG_DEBUG(("Start"));
3763 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3764 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
3767 SILC_PUT32_MSB(channel->mode, mode);
3768 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
3769 if (channel->founder_key)
3770 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3772 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
3773 6, csidp->data, csidp->len,
3776 hmac, hmac ? strlen(hmac) : 0,
3777 channel->passphrase,
3778 channel->passphrase ?
3779 strlen(channel->passphrase) : 0,
3783 silc_buffer_realloc(*channel_modes,
3785 (*channel_modes)->truelen + len : len));
3786 silc_buffer_pull_tail(*channel_modes,
3787 ((*channel_modes)->end -
3788 (*channel_modes)->data));
3789 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
3790 silc_buffer_pull(*channel_modes, len);
3791 silc_buffer_free(tmp);
3796 /* Now find all users on the channel */
3797 silc_hash_table_list(channel->user_list, &htl);
3798 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3799 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3802 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3803 clidp->data, clidp->len,
3804 chidp->data, chidp->len);
3807 silc_buffer_realloc(*channel_users,
3809 (*channel_users)->truelen + len : len));
3810 silc_buffer_pull_tail(*channel_users,
3811 ((*channel_users)->end -
3812 (*channel_users)->data));
3814 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3815 silc_buffer_pull(*channel_users, len);
3816 silc_buffer_free(tmp);
3818 /* CUMODE notify for mode change on the channel */
3819 SILC_PUT32_MSB(chl->mode, mode);
3820 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
3821 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3822 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3823 4, csidp->data, csidp->len,
3825 clidp->data, clidp->len,
3828 *channel_users_modes =
3829 silc_buffer_realloc(*channel_users_modes,
3830 (*channel_users_modes ?
3831 (*channel_users_modes)->truelen + len : len));
3832 silc_buffer_pull_tail(*channel_users_modes,
3833 ((*channel_users_modes)->end -
3834 (*channel_users_modes)->data));
3836 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3837 silc_buffer_pull(*channel_users_modes, len);
3838 silc_buffer_free(tmp);
3842 silc_buffer_free(clidp);
3844 silc_hash_table_list_reset(&htl);
3845 silc_buffer_free(chidp);
3846 silc_buffer_free(csidp);
3849 /* Returns assembled packets for all channels and users on those channels
3850 from the given ID List. The packets are in the form dictated by the
3851 New Channel and New Channel User payloads. */
3853 void silc_server_announce_get_channels(SilcServer server,
3855 SilcBuffer *channels,
3856 SilcBuffer **channel_modes,
3857 SilcBuffer *channel_users,
3858 SilcBuffer **channel_users_modes,
3859 SilcUInt32 *channel_users_modes_c,
3860 SilcBuffer **channel_topics,
3861 SilcChannelID ***channel_ids,
3862 unsigned long creation_time)
3864 SilcIDCacheList list;
3865 SilcIDCacheEntry id_cache;
3866 SilcChannelEntry channel;
3869 SilcUInt16 name_len;
3871 int i = *channel_users_modes_c;
3874 SILC_LOG_DEBUG(("Start"));
3876 /* Go through all channels in the list */
3877 if (silc_idcache_get_all(id_list->channels, &list)) {
3878 if (silc_idcache_list_first(list, &id_cache)) {
3880 channel = (SilcChannelEntry)id_cache->context;
3882 if (creation_time && channel->created < creation_time)
3887 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3888 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3889 name_len = strlen(channel->channel_name);
3892 len = 4 + name_len + id_len + 4;
3894 silc_buffer_realloc(*channels,
3895 (*channels ? (*channels)->truelen +
3897 silc_buffer_pull_tail(*channels,
3898 ((*channels)->end - (*channels)->data));
3899 silc_buffer_format(*channels,
3900 SILC_STR_UI_SHORT(name_len),
3901 SILC_STR_UI_XNSTRING(channel->channel_name,
3903 SILC_STR_UI_SHORT(id_len),
3904 SILC_STR_UI_XNSTRING(cid, id_len),
3905 SILC_STR_UI_INT(channel->mode),
3907 silc_buffer_pull(*channels, len);
3910 /* Channel user modes */
3911 *channel_users_modes = silc_realloc(*channel_users_modes,
3912 sizeof(**channel_users_modes) *
3914 (*channel_users_modes)[i] = NULL;
3915 *channel_modes = silc_realloc(*channel_modes,
3916 sizeof(**channel_modes) * (i + 1));
3917 (*channel_modes)[i] = NULL;
3918 *channel_ids = silc_realloc(*channel_ids,
3919 sizeof(**channel_ids) * (i + 1));
3920 (*channel_ids)[i] = NULL;
3921 silc_server_announce_get_channel_users(server, channel,
3922 &(*channel_modes)[i],
3924 &(*channel_users_modes)[i]);
3925 (*channel_ids)[i] = channel->id;
3927 /* Channel's topic */
3928 *channel_topics = silc_realloc(*channel_topics,
3929 sizeof(**channel_topics) * (i + 1));
3930 (*channel_topics)[i] = NULL;
3931 silc_server_announce_get_channel_topic(server, channel,
3932 &(*channel_topics)[i]);
3935 if (!silc_idcache_list_next(list, &id_cache))
3939 *channel_users_modes_c += i;
3942 silc_idcache_list_free(list);
3946 /* This function is used to announce our existing channels to our router
3947 when we've connected to it. This also announces the users on the
3948 channels to the router. If the `creation_time' is non-zero only the
3949 channels that was created after the `creation_time' are announced.
3950 Note that the channel users are still announced even if the `creation_time'
3953 void silc_server_announce_channels(SilcServer server,
3954 unsigned long creation_time,
3955 SilcSocketConnection remote)
3957 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
3958 SilcBuffer *channel_users_modes = NULL;
3959 SilcBuffer *channel_topics = NULL;
3960 SilcUInt32 channel_users_modes_c = 0;
3961 SilcChannelID **channel_ids = NULL;
3963 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3965 /* Get channels and channel users in local list */
3966 silc_server_announce_get_channels(server, server->local_list,
3967 &channels, &channel_modes,
3969 &channel_users_modes,
3970 &channel_users_modes_c,
3972 &channel_ids, creation_time);
3974 /* Get channels and channel users in global list */
3975 if (server->server_type != SILC_SERVER)
3976 silc_server_announce_get_channels(server, server->global_list,
3977 &channels, &channel_modes,
3979 &channel_users_modes,
3980 &channel_users_modes_c,
3982 &channel_ids, creation_time);
3985 silc_buffer_push(channels, channels->data - channels->head);
3986 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3988 /* Send the packet */
3989 silc_server_packet_send(server, remote,
3990 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3991 channels->data, channels->len,
3994 silc_buffer_free(channels);
3997 if (channel_users) {
3998 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3999 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4000 channel_users->len);
4002 /* Send the packet */
4003 silc_server_packet_send(server, remote,
4004 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4005 channel_users->data, channel_users->len,
4008 silc_buffer_free(channel_users);
4011 if (channel_modes) {
4014 for (i = 0; i < channel_users_modes_c; i++) {
4015 if (!channel_modes[i])
4017 silc_buffer_push(channel_modes[i],
4018 channel_modes[i]->data -
4019 channel_modes[i]->head);
4020 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4021 channel_modes[i]->len);
4022 silc_server_packet_send_dest(server, remote,
4023 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4024 channel_ids[i], SILC_ID_CHANNEL,
4025 channel_modes[i]->data,
4026 channel_modes[i]->len,
4028 silc_buffer_free(channel_modes[i]);
4030 silc_free(channel_modes);
4033 if (channel_users_modes) {
4036 for (i = 0; i < channel_users_modes_c; i++) {
4037 if (!channel_users_modes[i])
4039 silc_buffer_push(channel_users_modes[i],
4040 channel_users_modes[i]->data -
4041 channel_users_modes[i]->head);
4042 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4043 channel_users_modes[i]->len);
4044 silc_server_packet_send_dest(server, remote,
4045 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4046 channel_ids[i], SILC_ID_CHANNEL,
4047 channel_users_modes[i]->data,
4048 channel_users_modes[i]->len,
4050 silc_buffer_free(channel_users_modes[i]);
4052 silc_free(channel_users_modes);
4055 if (channel_topics) {
4058 for (i = 0; i < channel_users_modes_c; i++) {
4059 if (!channel_topics[i])
4062 silc_buffer_push(channel_topics[i],
4063 channel_topics[i]->data -
4064 channel_topics[i]->head);
4065 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4066 channel_topics[i]->len);
4067 silc_server_packet_send_dest(server, remote,
4068 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4069 channel_ids[i], SILC_ID_CHANNEL,
4070 channel_topics[i]->data,
4071 channel_topics[i]->len,
4073 silc_buffer_free(channel_topics[i]);
4075 silc_free(channel_topics);
4078 silc_free(channel_ids);
4081 /* Failure timeout callback. If this is called then we will immediately
4082 process the received failure. We always process the failure with timeout
4083 since we do not want to blindly trust to received failure packets.
4084 This won't be called (the timeout is cancelled) if the failure was
4085 bogus (it is bogus if remote does not close the connection after sending
4088 SILC_TASK_CALLBACK(silc_server_failure_callback)
4090 SilcServerFailureContext f = (SilcServerFailureContext)context;
4092 if (f->sock->protocol) {
4093 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4094 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4100 /* Assembles user list and users mode list from the `channel'. */
4102 bool silc_server_get_users_on_channel(SilcServer server,
4103 SilcChannelEntry channel,
4104 SilcBuffer *user_list,
4105 SilcBuffer *mode_list,
4106 SilcUInt32 *user_count)
4108 SilcChannelClientEntry chl;
4109 SilcHashTableList htl;
4110 SilcBuffer client_id_list;
4111 SilcBuffer client_mode_list;
4113 SilcUInt32 list_count = 0, len = 0;
4115 if (!silc_hash_table_count(channel->user_list))
4118 silc_hash_table_list(channel->user_list, &htl);
4119 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4120 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4121 silc_hash_table_list_reset(&htl);
4123 client_id_list = silc_buffer_alloc(len);
4125 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4126 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4127 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4129 silc_hash_table_list(channel->user_list, &htl);
4130 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4132 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4133 silc_buffer_put(client_id_list, idp->data, idp->len);
4134 silc_buffer_pull(client_id_list, idp->len);
4135 silc_buffer_free(idp);
4137 /* Client's mode on channel */
4138 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4139 silc_buffer_pull(client_mode_list, 4);
4143 silc_hash_table_list_reset(&htl);
4144 silc_buffer_push(client_id_list,
4145 client_id_list->data - client_id_list->head);
4146 silc_buffer_push(client_mode_list,
4147 client_mode_list->data - client_mode_list->head);
4149 *user_list = client_id_list;
4150 *mode_list = client_mode_list;
4151 *user_count = list_count;
4155 /* Saves users and their modes to the `channel'. */
4157 void silc_server_save_users_on_channel(SilcServer server,
4158 SilcSocketConnection sock,
4159 SilcChannelEntry channel,
4160 SilcClientID *noadd,
4161 SilcBuffer user_list,
4162 SilcBuffer mode_list,
4163 SilcUInt32 user_count)
4168 SilcClientID *client_id;
4169 SilcClientEntry client;
4170 SilcIDCacheEntry cache;
4171 SilcChannelClientEntry chl;
4174 SILC_LOG_DEBUG(("Start"));
4176 for (i = 0; i < user_count; i++) {
4178 SILC_GET16_MSB(idp_len, user_list->data + 2);
4180 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4181 silc_buffer_pull(user_list, idp_len);
4186 SILC_GET32_MSB(mode, mode_list->data);
4187 silc_buffer_pull(mode_list, 4);
4189 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4190 silc_free(client_id);
4196 /* Check if we have this client cached already. */
4197 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4198 server->server_type, &cache);
4200 client = silc_idlist_find_client_by_id(server->global_list,
4201 client_id, server->server_type,
4206 /* If router did not find such Client ID in its lists then this must
4207 be bogus client or some router in the net is buggy. */
4208 if (server->server_type == SILC_ROUTER) {
4209 silc_free(client_id);
4213 /* We don't have that client anywhere, add it. The client is added
4214 to global list since server didn't have it in the lists so it must be
4216 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4217 silc_id_dup(client_id, SILC_ID_CLIENT),
4218 sock->user_data, NULL, 0);
4220 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4221 silc_free(client_id);
4225 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4227 /* Found, if it is from global list we'll assure that we won't
4228 expire it now that the entry is on channel. */
4233 silc_free(client_id);
4235 if (!silc_server_client_on_channel(client, channel, &chl)) {
4236 /* Client was not on the channel, add it. */
4237 chl = silc_calloc(1, sizeof(*chl));
4238 chl->client = client;
4240 chl->channel = channel;
4241 silc_hash_table_add(channel->user_list, chl->client, chl);
4242 silc_hash_table_add(client->channels, chl->channel, chl);
4243 channel->user_count++;
4251 /* Saves channels and channels user modes to the `client'. Removes
4252 the client from those channels that are not sent in the list but
4255 void silc_server_save_user_channels(SilcServer server,
4256 SilcSocketConnection sock,
4257 SilcClientEntry client,
4258 SilcBuffer channels,
4259 SilcBuffer channels_user_modes)
4262 SilcUInt32 *chumodes;
4263 SilcChannelPayload entry;
4264 SilcChannelEntry channel;
4265 SilcChannelID *channel_id;
4266 SilcChannelClientEntry chl;
4267 SilcHashTable ht = NULL;
4268 SilcHashTableList htl;
4272 if (!channels ||!channels_user_modes)
4275 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4276 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4278 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4279 NULL, NULL, NULL, TRUE);
4280 silc_dlist_start(ch);
4281 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4282 /* Check if we have this channel, and add it if we don't have it.
4283 Also add the client on the channel unless it is there already. */
4284 channel_id = silc_channel_get_id_parse(entry);
4285 channel = silc_idlist_find_channel_by_id(server->local_list,
4288 channel = silc_idlist_find_channel_by_id(server->global_list,
4291 if (server->server_type != SILC_SERVER) {
4292 silc_free(channel_id);
4297 /* We don't have that channel anywhere, add it. */
4298 name = silc_channel_get_name(entry, NULL);
4299 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4300 channel_id, server->router,
4303 silc_free(channel_id);
4310 channel->mode = silc_channel_get_mode(entry);
4312 /* Add the client on the channel */
4313 if (!silc_server_client_on_channel(client, channel, &chl)) {
4314 chl = silc_calloc(1, sizeof(*chl));
4315 chl->client = client;
4316 chl->mode = chumodes[i++];
4317 chl->channel = channel;
4318 silc_hash_table_add(channel->user_list, chl->client, chl);
4319 silc_hash_table_add(client->channels, chl->channel, chl);
4320 channel->user_count++;
4323 chl->mode = chumodes[i++];
4326 silc_hash_table_add(ht, channel, channel);
4327 silc_free(channel_id);
4329 silc_channel_payload_list_free(ch);
4330 silc_free(chumodes);
4334 /* Go through the list again and remove client from channels that
4335 are no part of the list. */
4337 silc_hash_table_list(client->channels, &htl);
4338 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4339 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4340 silc_hash_table_del(chl->channel->user_list, chl->client);
4341 silc_hash_table_del(chl->client->channels, chl->channel);
4345 silc_hash_table_list_reset(&htl);
4346 silc_hash_table_free(ht);
4348 silc_hash_table_list(client->channels, &htl);
4349 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4350 silc_hash_table_del(chl->channel->user_list, chl->client);
4351 silc_hash_table_del(chl->client->channels, chl->channel);
4354 silc_hash_table_list_reset(&htl);
4358 /* Lookups route to the client indicated by the `id_data'. The connection
4359 object and internal data object is returned. Returns NULL if route
4360 could not be found to the client. If the `client_id' is specified then
4361 it is used and the `id_data' is ignored. */
4363 SilcSocketConnection
4364 silc_server_get_client_route(SilcServer server,
4365 unsigned char *id_data,
4367 SilcClientID *client_id,
4368 SilcIDListData *idata,
4369 SilcClientEntry *client_entry)
4372 SilcClientEntry client;
4374 SILC_LOG_DEBUG(("Start"));
4377 *client_entry = NULL;
4379 /* Decode destination Client ID */
4381 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4383 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4387 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4390 /* If the destination belongs to our server we don't have to route
4391 the packet anywhere but to send it to the local destination. */
4392 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4396 /* If we are router and the client has router then the client is in
4397 our cell but not directly connected to us. */
4398 if (server->server_type == SILC_ROUTER && client->router) {
4399 /* We are of course in this case the client's router thus the route
4400 to the client is the server who owns the client. So, we will send
4401 the packet to that server. */
4403 *idata = (SilcIDListData)client->router;
4404 return client->router->connection;
4407 /* Seems that client really is directly connected to us */
4409 *idata = (SilcIDListData)client;
4411 *client_entry = client;
4412 return client->connection;
4415 /* Destination belongs to someone not in this server. If we are normal
4416 server our action is to send the packet to our router. */
4417 if (server->server_type != SILC_ROUTER && !server->standalone) {
4420 *idata = (SilcIDListData)server->router;
4421 return SILC_PRIMARY_ROUTE(server);
4424 /* We are router and we will perform route lookup for the destination
4425 and send the packet to fastest route. */
4426 if (server->server_type == SILC_ROUTER && !server->standalone) {
4427 /* Check first that the ID is valid */
4428 client = silc_idlist_find_client_by_id(server->global_list, id,
4431 SilcSocketConnection dst_sock;
4433 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4437 *idata = (SilcIDListData)dst_sock->user_data;
4446 /* Encodes and returns channel list of channels the `client' has joined.
4447 Secret channels are not put to the list. */
4449 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4450 SilcClientEntry client,
4453 SilcBuffer *user_mode_list)
4455 SilcBuffer buffer = NULL;
4456 SilcChannelEntry channel;
4457 SilcChannelClientEntry chl;
4458 SilcHashTableList htl;
4461 SilcUInt16 name_len;
4465 *user_mode_list = NULL;
4467 silc_hash_table_list(client->channels, &htl);
4468 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4469 channel = chl->channel;
4471 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4473 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4476 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4477 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4478 name_len = strlen(channel->channel_name);
4480 len = 4 + name_len + id_len + 4;
4481 buffer = silc_buffer_realloc(buffer,
4482 (buffer ? buffer->truelen + len : len));
4483 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4484 silc_buffer_format(buffer,
4485 SILC_STR_UI_SHORT(name_len),
4486 SILC_STR_UI_XNSTRING(channel->channel_name,
4488 SILC_STR_UI_SHORT(id_len),
4489 SILC_STR_UI_XNSTRING(cid, id_len),
4490 SILC_STR_UI_INT(chl->channel->mode),
4492 silc_buffer_pull(buffer, len);
4495 if (user_mode_list) {
4496 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4498 (*user_mode_list)->truelen + 4 :
4500 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4501 (*user_mode_list)->data));
4502 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4503 silc_buffer_pull(*user_mode_list, 4);
4506 silc_hash_table_list_reset(&htl);
4509 silc_buffer_push(buffer, buffer->data - buffer->head);
4510 if (user_mode_list && *user_mode_list)
4511 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4512 (*user_mode_list)->head));
4517 /* Finds client entry by Client ID and if it is not found then resolves
4518 it using WHOIS command. */
4520 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4521 SilcClientID *client_id,
4522 bool always_resolve,
4525 SilcClientEntry client;
4530 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4533 client = silc_idlist_find_client_by_id(server->global_list,
4534 client_id, TRUE, NULL);
4535 if (!client && server->server_type == SILC_ROUTER)
4539 if (!client && server->standalone)
4542 if (!client || !client->nickname || !client->username ||
4544 SilcBuffer buffer, idp;
4547 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4548 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4549 client->resolve_cmd_ident = ++server->cmd_ident;
4552 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4553 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4554 server->cmd_ident, 1,
4555 4, idp->data, idp->len);
4556 silc_server_packet_send(server, client ? client->router->connection :
4557 SILC_PRIMARY_ROUTE(server),
4558 SILC_PACKET_COMMAND, 0,
4559 buffer->data, buffer->len, FALSE);
4560 silc_buffer_free(idp);
4561 silc_buffer_free(buffer);
4572 /* A timeout callback for the re-key. We will be the initiator of the
4575 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4577 SilcSocketConnection sock = (SilcSocketConnection)context;
4578 SilcIDListData idata = (SilcIDListData)sock->user_data;
4579 SilcServer server = (SilcServer)idata->rekey->context;
4580 SilcProtocol protocol;
4581 SilcServerRekeyInternalContext *proto_ctx;
4583 SILC_LOG_DEBUG(("Start"));
4585 /* Allocate internal protocol context. This is sent as context
4587 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4588 proto_ctx->server = (void *)server;
4589 proto_ctx->sock = sock;
4590 proto_ctx->responder = FALSE;
4591 proto_ctx->pfs = idata->rekey->pfs;
4593 /* Perform rekey protocol. Will call the final callback after the
4594 protocol is over. */
4595 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4596 &protocol, proto_ctx, silc_server_rekey_final);
4597 sock->protocol = protocol;
4599 /* Run the protocol */
4600 silc_protocol_execute(protocol, server->schedule, 0, 0);
4602 /* Re-register re-key timeout */
4603 silc_schedule_task_add(server->schedule, sock->sock,
4604 silc_server_rekey_callback,
4605 context, idata->rekey->timeout, 0,
4606 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4609 /* The final callback for the REKEY protocol. This will actually take the
4610 new key material into use. */
4612 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4614 SilcProtocol protocol = (SilcProtocol)context;
4615 SilcServerRekeyInternalContext *ctx =
4616 (SilcServerRekeyInternalContext *)protocol->context;
4617 SilcServer server = (SilcServer)ctx->server;
4618 SilcSocketConnection sock = ctx->sock;
4620 SILC_LOG_DEBUG(("Start"));
4622 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4623 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4624 /* Error occured during protocol */
4625 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4626 silc_protocol_cancel(protocol, server->schedule);
4627 silc_protocol_free(protocol);
4628 sock->protocol = NULL;
4630 silc_packet_context_free(ctx->packet);
4632 silc_ske_free(ctx->ske);
4637 /* Purge the outgoing data queue to assure that all rekey packets really
4638 go to the network before we quit the protocol. */
4639 silc_server_packet_queue_purge(server, sock);
4642 silc_protocol_free(protocol);
4643 sock->protocol = NULL;
4645 silc_packet_context_free(ctx->packet);
4647 silc_ske_free(ctx->ske);
4651 /* Task callback used to retrieve network statistical information from
4652 router server once in a while. */
4654 SILC_TASK_CALLBACK(silc_server_get_stats)
4656 SilcServer server = (SilcServer)context;
4657 SilcBuffer idp, packet;
4659 SILC_LOG_DEBUG(("Retrieving stats from router"));
4661 if (!server->standalone) {
4662 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4663 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4664 ++server->cmd_ident, 1,
4665 1, idp->data, idp->len);
4666 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4667 SILC_PACKET_COMMAND, 0, packet->data,
4668 packet->len, FALSE);
4669 silc_buffer_free(packet);
4670 silc_buffer_free(idp);
4673 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4674 server, 120, 0, SILC_TASK_TIMEOUT,