5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
91 silc_dlist_uninit(server->sim);
95 silc_server_config_unref(&server->config_ref);
97 silc_rng_free(server->rng);
99 silc_pkcs_free(server->pkcs);
100 if (server->public_key)
101 silc_pkcs_public_key_free(server->public_key);
102 if (server->private_key)
103 silc_pkcs_private_key_free(server->private_key);
104 if (server->pending_commands)
105 silc_dlist_uninit(server->pending_commands);
106 if (server->id_entry)
107 silc_idlist_del_server(server->local_list, server->id_entry);
109 silc_idcache_free(server->local_list->clients);
110 silc_idcache_free(server->local_list->servers);
111 silc_idcache_free(server->local_list->channels);
112 silc_idcache_free(server->global_list->clients);
113 silc_idcache_free(server->global_list->servers);
114 silc_idcache_free(server->global_list->channels);
115 silc_hash_table_free(server->watcher_list);
117 silc_hash_free(server->md5hash);
118 silc_hash_free(server->sha1hash);
119 silc_hmac_unregister_all();
120 silc_hash_unregister_all();
121 silc_cipher_unregister_all();
122 silc_pkcs_unregister_all();
124 silc_free(server->local_list);
125 silc_free(server->global_list);
126 silc_free(server->server_name);
127 silc_free(server->id_string);
128 silc_free(server->purge_i);
129 silc_free(server->purge_g);
133 /* Creates a new server listener. */
135 static bool silc_server_listen(SilcServer server, const char *server_ip,
136 SilcUInt16 port, int *sock)
138 *sock = silc_net_create_server(port, server_ip);
140 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
147 /* Adds a secondary listener. */
149 bool silc_server_init_secondary(SilcServer server)
151 int sock = 0, sock_list[server->config->param.connections_max];
152 SilcSocketConnection newsocket = NULL;
153 SilcServerConfigServerInfoInterface *interface;
155 for (interface = server->config->server_info->secondary; interface;
156 interface = interface->next, sock++) {
158 if (!silc_server_listen(server,
159 interface->server_ip, interface->port, &sock_list[sock]))
162 /* Set socket to non-blocking mode */
163 silc_net_set_socket_nonblock(sock_list[sock]);
165 /* Add ourselves also to the socket table. The entry allocated above
166 is sent as argument for fast referencing in the future. */
167 silc_socket_alloc(sock_list[sock],
168 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
169 server->sockets[sock_list[sock]] = newsocket;
170 SILC_SET_LISTENER(newsocket);
172 /* Perform name and address lookups to resolve the listenning address
174 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
176 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
178 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
179 newsocket->hostname ? newsocket->hostname :
180 newsocket->ip ? newsocket->ip : ""));
181 server->stat.conn_failures++;
184 if (!newsocket->hostname)
185 newsocket->hostname = strdup(newsocket->ip);
187 newsocket->port = silc_net_get_local_port(sock);
189 newsocket->user_data = (void *)server->id_entry;
190 silc_schedule_task_add(server->schedule, sock_list[sock],
191 silc_server_accept_new_connection,
192 (void *)server, 0, 0,
194 SILC_TASK_PRI_NORMAL);
200 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
204 /* Initializes the entire SILC server. This is called always before running
205 the server. This is called only once at the initialization of the program.
206 This binds the server to its listenning port. After this function returns
207 one should call silc_server_run to start the server. This returns TRUE
208 when everything is ok to run the server. Configuration file must be
209 read and parsed before calling this. */
211 bool silc_server_init(SilcServer server)
215 SilcServerEntry id_entry;
216 SilcIDListPurge purge;
217 SilcSocketConnection newsocket = NULL;
219 SILC_LOG_DEBUG(("Initializing server"));
221 server->starttime = time(NULL);
223 /* Take config object for us */
224 silc_server_config_ref(&server->config_ref, server->config,
227 /* Steal public and private key from the config object */
228 server->public_key = server->config->server_info->public_key;
229 server->private_key = server->config->server_info->private_key;
230 server->config->server_info->public_key = NULL;
231 server->config->server_info->private_key = NULL;
233 /* Register all configured ciphers, PKCS and hash functions. */
234 if (!silc_server_config_register_ciphers(server))
235 silc_cipher_register_default();
236 if (!silc_server_config_register_pkcs(server))
237 silc_pkcs_register_default();
238 if (!silc_server_config_register_hashfuncs(server))
239 silc_hash_register_default();
240 if (!silc_server_config_register_hmacs(server))
241 silc_hmac_register_default();
243 /* Initialize random number generator for the server. */
244 server->rng = silc_rng_alloc();
245 silc_rng_init(server->rng);
246 silc_rng_global_init(server->rng);
248 /* Initialize hash functions for server to use */
249 silc_hash_alloc("md5", &server->md5hash);
250 silc_hash_alloc("sha1", &server->sha1hash);
252 /* Allocate PKCS context for local public and private keys */
253 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
255 silc_pkcs_public_key_set(server->pkcs, server->public_key);
256 silc_pkcs_private_key_set(server->pkcs, server->private_key);
258 /* Initialize the scheduler */
259 server->schedule = silc_schedule_init(server->config->param.connections_max);
260 if (!server->schedule)
263 /* First, register log files configuration for error output */
264 silc_server_config_setlogfiles(server);
266 /* Initialize ID caches */
267 server->local_list->clients =
268 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
269 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
270 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
272 /* These are allocated for normal server as well as these hold some
273 global information that the server has fetched from its router. For
274 router these are used as they are supposed to be used on router. */
275 server->global_list->clients =
276 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
277 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
278 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
280 /* Init watcher list */
281 server->watcher_list =
282 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
283 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
285 if (!server->watcher_list)
288 /* Create a listening server */
289 if (!silc_server_listen(server,
290 server->config->server_info->primary == NULL ? NULL :
291 server->config->server_info->primary->server_ip,
292 server->config->server_info->primary == NULL ? 0 :
293 server->config->server_info->primary->port,
297 /* Set socket to non-blocking mode */
298 silc_net_set_socket_nonblock(sock);
301 /* Allocate the entire socket list that is used in server. Eventually
302 all connections will have entry in this table (it is a table of
303 pointers to the actual object that is allocated individually
305 server->sockets = silc_calloc(server->config->param.connections_max,
306 sizeof(*server->sockets));
307 if (!server->sockets)
310 /* Add ourselves also to the socket table. The entry allocated above
311 is sent as argument for fast referencing in the future. */
312 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
313 server->sockets[sock] = newsocket;
314 SILC_SET_LISTENER(newsocket);
316 /* Perform name and address lookups to resolve the listenning address
318 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
320 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
322 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
323 newsocket->hostname ? newsocket->hostname :
324 newsocket->ip ? newsocket->ip : ""));
325 server->stat.conn_failures++;
328 if (!newsocket->hostname)
329 newsocket->hostname = strdup(newsocket->ip);
331 newsocket->port = silc_net_get_local_port(sock);
333 /* Create a Server ID for the server. */
334 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
339 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
340 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
341 server->server_name = server->config->server_info->server_name;
342 server->config->server_info->server_name = NULL;
344 /* Add ourselves to the server list. We don't have a router yet
345 beacuse we haven't established a route yet. It will be done later.
346 For now, NULL is sent as router. This allocates new entry to
349 silc_idlist_add_server(server->local_list, strdup(server->server_name),
350 server->server_type, server->id, NULL, NULL);
352 SILC_LOG_ERROR(("Could not add ourselves to cache"));
355 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
357 /* Put the allocated socket pointer also to the entry allocated above
358 for fast back-referencing to the socket list. */
359 newsocket->user_data = (void *)id_entry;
360 id_entry->connection = (void *)newsocket;
361 server->id_entry = id_entry;
363 /* Register protocols */
364 silc_server_protocols_register();
366 /* Add the first task to the scheduler. This is task that is executed by
367 timeout. It expires as soon as the caller calls silc_server_run. This
368 task performs authentication protocol and key exchange with our
370 silc_schedule_task_add(server->schedule, 0,
371 silc_server_connect_to_router,
372 (void *)server, 0, 1,
374 SILC_TASK_PRI_NORMAL);
376 /* Add listener task to the scheduler. This task receives new connections
377 to the server. This task remains on the queue until the end of the
379 silc_schedule_task_add(server->schedule, sock,
380 silc_server_accept_new_connection,
381 (void *)server, 0, 0,
383 SILC_TASK_PRI_NORMAL);
385 if (silc_server_init_secondary(server) == FALSE)
388 server->listenning = TRUE;
390 /* If server connections has been configured then we must be router as
391 normal server cannot have server connections, only router connections. */
392 if (server->config->servers) {
393 SilcServerConfigServer *ptr = server->config->servers;
395 server->server_type = SILC_ROUTER;
397 if (ptr->backup_router) {
398 server->server_type = SILC_BACKUP_ROUTER;
399 server->backup_router = TRUE;
400 server->id_entry->server_type = SILC_BACKUP_ROUTER;
407 /* Register the ID Cache purge task. This periodically purges the ID cache
408 and removes the expired cache entries. */
410 /* Clients local list */
411 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
412 purge->cache = server->local_list->clients;
413 purge->schedule = server->schedule;
414 purge->timeout = 600;
415 silc_schedule_task_add(purge->schedule, 0,
417 (void *)purge, purge->timeout, 0,
418 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
420 /* Clients global list */
421 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
422 purge->cache = server->global_list->clients;
423 purge->schedule = server->schedule;
424 purge->timeout = 300;
425 silc_schedule_task_add(purge->schedule, 0,
427 (void *)purge, purge->timeout, 0,
428 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
430 /* If we are normal server we'll retrieve network statisticial information
431 once in a while from the router. */
432 if (server->server_type == SILC_SERVER)
433 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
434 server, 10, 0, SILC_TASK_TIMEOUT,
437 if (server->server_type == SILC_ROUTER)
438 server->stat.routers++;
440 SILC_LOG_DEBUG(("Server initialized"));
442 /* We are done here, return succesfully */
446 silc_server_config_unref(&server->config_ref);
447 silc_net_close_server(sock);
451 /* This function basically reads the config file again and switches the config
452 object pointed by the server object. After that, we have to fix various
453 things such as the server_name and the listening ports.
454 Keep in mind that we no longer have the root privileges at this point. */
456 bool silc_server_rehash(SilcServer server)
458 SilcServerConfig newconfig;
460 SILC_LOG_INFO(("Rehashing server"));
462 /* Reset the logging system */
463 silc_log_quick = TRUE;
464 silc_log_flush_all();
466 /* Start the main rehash phase (read again the config file) */
467 newconfig = silc_server_config_alloc(server->config_file);
469 SILC_LOG_ERROR(("Rehash FAILED."));
473 /* Reinit scheduler if necessary */
474 if (newconfig->param.connections_max > server->config->param.connections_max)
475 if (!silc_schedule_reinit(server->schedule,
476 newconfig->param.connections_max))
479 /* Fix the server_name field */
480 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
481 silc_free(server->server_name);
482 server->server_name = newconfig->server_info->server_name;
483 newconfig->server_info->server_name = NULL;
485 /* Update the idcache list with a fresh pointer */
486 silc_free(server->id_entry->server_name);
487 server->id_entry->server_name = strdup(server->server_name);
488 if (!silc_idcache_del_by_context(server->local_list->servers,
491 if (!silc_idcache_add(server->local_list->servers,
492 server->id_entry->server_name,
493 server->id_entry->id, server->id_entry, 0, NULL))
498 silc_server_config_setlogfiles(server);
500 /* Change new key pair if necessary */
501 if (newconfig->server_info->public_key &&
502 !silc_pkcs_public_key_compare(server->public_key,
503 newconfig->server_info->public_key)) {
504 silc_pkcs_public_key_free(server->public_key);
505 silc_pkcs_private_key_free(server->private_key);
506 server->public_key = newconfig->server_info->public_key;
507 server->private_key = newconfig->server_info->private_key;
508 newconfig->server_info->public_key = NULL;
509 newconfig->server_info->private_key = NULL;
511 /* Allocate PKCS context for local public and private keys */
512 silc_pkcs_free(server->pkcs);
513 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
515 silc_pkcs_public_key_set(server->pkcs, server->public_key);
516 silc_pkcs_private_key_set(server->pkcs, server->private_key);
519 /* Go through all configured routers after rehash */
520 silc_schedule_task_add(server->schedule, 0,
521 silc_server_connect_to_router,
522 (void *)server, 0, 1,
524 SILC_TASK_PRI_NORMAL);
526 /* Check whether our router status has changed */
527 if (newconfig->servers) {
528 SilcServerConfigServer *ptr = newconfig->servers;
530 server->server_type = SILC_ROUTER;
532 if (ptr->backup_router) {
533 server->server_type = SILC_BACKUP_ROUTER;
534 server->backup_router = TRUE;
535 server->id_entry->server_type = SILC_BACKUP_ROUTER;
542 /* Our old config is gone now. We'll unreference our reference made in
543 silc_server_init and then destroy it since we are destroying it
544 underneath the application (layer which called silc_server_init). */
545 silc_server_config_unref(&server->config_ref);
546 silc_server_config_destroy(server->config);
548 /* Take new config context */
549 server->config = newconfig;
550 silc_server_config_ref(&server->config_ref, server->config, server->config);
552 SILC_LOG_DEBUG(("Server rehashed"));
557 /* The heart of the server. This runs the scheduler thus runs the server.
558 When this returns the server has been stopped and the program will
561 void silc_server_run(SilcServer server)
563 SILC_LOG_INFO(("SILC Server started"));
565 /* Start the scheduler, the heart of the SILC server. When this returns
566 the program will be terminated. */
567 silc_schedule(server->schedule);
570 /* Stops the SILC server. This function is used to shutdown the server.
571 This is usually called after the scheduler has returned. After stopping
572 the server one should call silc_server_free. */
574 void silc_server_stop(SilcServer server)
576 SILC_LOG_DEBUG(("Stopping server"));
578 if (server->schedule) {
581 /* Close all connections */
582 for (i = 0; i < server->config->param.connections_max; i++) {
583 if (!server->sockets[i])
585 if (!SILC_IS_LISTENER(server->sockets[i])) {
586 silc_schedule_task_del_by_context(server->schedule,
588 silc_server_disconnect_remote(server, server->sockets[i],
590 "Server is shutting down");
592 silc_socket_free(server->sockets[i]);
593 server->sockets[i] = NULL;
597 /* We are not connected to network anymore */
598 server->standalone = TRUE;
600 silc_schedule_stop(server->schedule);
601 silc_schedule_uninit(server->schedule);
602 server->schedule = NULL;
604 silc_free(server->sockets);
605 server->sockets = NULL;
608 silc_server_protocols_unregister();
610 SILC_LOG_DEBUG(("Server stopped"));
613 /* Function that is called when the network connection to a router has
614 been established. This will continue with the key exchange protocol
615 with the remote router. */
617 void silc_server_start_key_exchange(SilcServer server,
618 SilcServerConnection sconn,
621 SilcSocketConnection newsocket;
622 SilcProtocol protocol;
623 SilcServerKEInternalContext *proto_ctx;
624 SilcServerConfigRouter *conn =
625 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
628 /* Cancel any possible retry timeouts */
629 silc_schedule_task_del_by_callback(server->schedule,
630 silc_server_connect_to_router_retry);
632 /* Set socket options */
633 silc_net_set_socket_nonblock(sock);
634 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
636 /* Create socket connection for the connection. Even though we
637 know that we are connecting to a router we will mark the socket
638 to be unknown connection until we have executed authentication
640 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
641 server->sockets[sock] = newsocket;
642 newsocket->hostname = strdup(sconn->remote_host);
643 newsocket->ip = strdup(sconn->remote_host);
644 newsocket->port = sconn->remote_port;
645 sconn->sock = newsocket;
647 /* Allocate internal protocol context. This is sent as context
649 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
650 proto_ctx->server = (void *)server;
651 proto_ctx->context = (void *)sconn;
652 proto_ctx->sock = newsocket;
653 proto_ctx->rng = server->rng;
654 proto_ctx->responder = FALSE;
656 /* Set Key Exchange flags from configuration, but fall back to global
658 SILC_GET_SKE_FLAGS(conn, proto_ctx);
659 if (server->config->param.key_exchange_pfs)
660 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
662 /* Perform key exchange protocol. silc_server_connect_to_router_second
663 will be called after the protocol is finished. */
664 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
665 &protocol, proto_ctx,
666 silc_server_connect_to_router_second);
667 newsocket->protocol = protocol;
669 /* Register a timeout task that will be executed if the protocol
670 is not executed within set limit. */
671 proto_ctx->timeout_task =
672 silc_schedule_task_add(server->schedule, sock,
673 silc_server_timeout_remote,
674 server, server->config->key_exchange_timeout, 0,
678 /* Register the connection for network input and output. This sets
679 that scheduler will listen for incoming packets for this connection
680 and sets that outgoing packets may be sent to this connection as
681 well. However, this doesn't set the scheduler for outgoing traffic,
682 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
683 later when outgoing data is available. */
684 context = (void *)server;
685 SILC_REGISTER_CONNECTION_FOR_IO(sock);
687 /* Run the protocol */
688 silc_protocol_execute(protocol, server->schedule, 0, 0);
691 /* Timeout callback that will be called to retry connecting to remote
692 router. This is used by both normal and router server. This will wait
693 before retrying the connecting. The timeout is generated by exponential
694 backoff algorithm. */
696 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
698 SilcServerConnection sconn = (SilcServerConnection)context;
699 SilcServer server = sconn->server;
700 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
701 SilcServerConfigConnParams *param =
702 (conn->param ? conn->param : &server->config->param);
704 SILC_LOG_INFO(("Retrying connecting to a router"));
706 /* Calculate next timeout */
707 if (sconn->retry_count >= 1) {
708 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
709 if (sconn->retry_timeout > param->reconnect_interval_max)
710 sconn->retry_timeout = param->reconnect_interval_max;
712 sconn->retry_timeout = param->reconnect_interval;
714 sconn->retry_count++;
715 sconn->retry_timeout = sconn->retry_timeout +
716 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
718 /* If we've reached max retry count, give up. */
719 if ((sconn->retry_count > param->reconnect_count) &&
720 !param->reconnect_keep_trying) {
721 SILC_LOG_ERROR(("Could not connect to router, giving up"));
722 silc_server_config_unref(&sconn->conn);
723 silc_free(sconn->remote_host);
724 silc_free(sconn->backup_replace_ip);
729 /* We will lookup a fresh pointer later */
730 silc_server_config_unref(&sconn->conn);
732 /* Wait one before retrying */
733 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
734 context, sconn->retry_timeout, 0,
735 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
738 /* Generic routine to use connect to a router. */
740 SILC_TASK_CALLBACK(silc_server_connect_router)
742 SilcServerConnection sconn = (SilcServerConnection)context;
743 SilcServer server = sconn->server;
744 SilcServerConfigRouter *rconn;
747 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
748 (sconn->backup ? "backup router" : "router"),
749 sconn->remote_host, sconn->remote_port));
751 server->router_connect = time(NULL);
752 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
755 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
756 (sconn->backup ? "backup router" : "router"),
757 sconn->remote_host, sconn->remote_port));
758 silc_free(sconn->remote_host);
759 silc_free(sconn->backup_replace_ip);
763 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
765 /* Connect to remote host */
766 sock = silc_net_create_connection(
767 (!server->config->server_info->primary ? NULL :
768 server->config->server_info->primary->server_ip),
769 sconn->remote_port, sconn->remote_host);
771 SILC_LOG_ERROR(("Could not connect to router %s:%d",
772 sconn->remote_host, sconn->remote_port));
773 if (!sconn->no_reconnect)
774 silc_schedule_task_add(server->schedule, 0,
775 silc_server_connect_to_router_retry,
776 context, 0, 1, SILC_TASK_TIMEOUT,
777 SILC_TASK_PRI_NORMAL);
779 silc_server_config_unref(&sconn->conn);
783 /* Continue with key exchange protocol */
784 silc_server_start_key_exchange(server, sconn, sock);
787 /* This function connects to our primary router or if we are a router this
788 establishes all our primary routes. This is called at the start of the
789 server to do authentication and key exchange with our router - called
792 SILC_TASK_CALLBACK(silc_server_connect_to_router)
794 SilcServer server = (SilcServer)context;
795 SilcServerConnection sconn;
796 SilcServerConfigRouter *ptr;
798 SILC_LOG_DEBUG(("Connecting to router(s)"));
800 if (server->server_type == SILC_SERVER) {
801 SILC_LOG_DEBUG(("We are normal server"));
802 } else if (server->server_type == SILC_ROUTER) {
803 SILC_LOG_DEBUG(("We are router"));
805 SILC_LOG_DEBUG(("We are backup router/normal server"));
808 if (!server->config->routers) {
809 /* There wasn't a configured router, we will continue but we don't
810 have a connection to outside world. We will be standalone server. */
811 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
812 server->standalone = TRUE;
816 /* Cancel any possible retry timeouts */
817 silc_schedule_task_del_by_callback(server->schedule,
818 silc_server_connect_router);
819 silc_schedule_task_del_by_callback(server->schedule,
820 silc_server_connect_to_router_retry);
822 /* Create the connections to all our routes */
823 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
825 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
826 ptr->backup_router ? "Backup router" : "Router",
827 ptr->initiator ? "Initiator" : "Responder",
828 ptr->host, ptr->port));
830 if (ptr->initiator) {
831 /* Check whether we are connected to this host already */
832 if (silc_server_num_sockets_by_remote(server,
833 silc_net_is_ip(ptr->host) ?
835 silc_net_is_ip(ptr->host) ?
836 NULL : ptr->host, ptr->port,
837 SILC_SOCKET_TYPE_ROUTER)) {
838 SILC_LOG_DEBUG(("We are already connected to this router"));
842 /* Allocate connection object for hold connection specific stuff. */
843 sconn = silc_calloc(1, sizeof(*sconn));
844 sconn->server = server;
845 sconn->remote_host = strdup(ptr->host);
846 sconn->remote_port = ptr->port;
847 sconn->backup = ptr->backup_router;
849 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
850 sconn->backup_replace_port = ptr->backup_replace_port;
853 if (!server->router_conn && !sconn->backup)
854 server->router_conn = sconn;
856 silc_schedule_task_add(server->schedule, 0,
857 silc_server_connect_router,
858 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
859 SILC_TASK_PRI_NORMAL);
864 /* Second part of connecting to router(s). Key exchange protocol has been
865 executed and now we will execute authentication protocol. */
867 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
869 SilcProtocol protocol = (SilcProtocol)context;
870 SilcServerKEInternalContext *ctx =
871 (SilcServerKEInternalContext *)protocol->context;
872 SilcServer server = (SilcServer)ctx->server;
873 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
874 SilcSocketConnection sock = ctx->sock;
875 SilcServerConnAuthInternalContext *proto_ctx;
876 SilcServerConfigRouter *conn = NULL;
878 SILC_LOG_DEBUG(("Start"));
880 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
881 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
882 /* Error occured during protocol */
883 silc_protocol_free(protocol);
884 sock->protocol = NULL;
885 silc_ske_free_key_material(ctx->keymat);
887 silc_packet_context_free(ctx->packet);
889 silc_ske_free(ctx->ske);
890 silc_free(ctx->dest_id);
892 silc_server_config_unref(&sconn->conn);
893 silc_free(sconn->remote_host);
894 silc_free(sconn->backup_replace_ip);
896 silc_schedule_task_del_by_callback(server->schedule,
897 silc_server_failure_callback);
898 silc_server_disconnect_remote(server, sock,
899 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
903 /* We now have the key material as the result of the key exchange
904 protocol. Take the key material into use. Free the raw key material
905 as soon as we've set them into use. */
906 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
907 ctx->sock, ctx->keymat,
908 ctx->ske->prop->cipher,
909 ctx->ske->prop->pkcs,
910 ctx->ske->prop->hash,
911 ctx->ske->prop->hmac,
912 ctx->ske->prop->group,
914 silc_protocol_free(protocol);
915 sock->protocol = NULL;
916 silc_ske_free_key_material(ctx->keymat);
918 silc_packet_context_free(ctx->packet);
920 silc_ske_free(ctx->ske);
921 silc_free(ctx->dest_id);
923 silc_server_config_unref(&sconn->conn);
924 silc_free(sconn->remote_host);
925 silc_free(sconn->backup_replace_ip);
927 silc_schedule_task_del_by_callback(server->schedule,
928 silc_server_failure_callback);
929 silc_server_disconnect_remote(server, sock,
930 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
933 silc_ske_free_key_material(ctx->keymat);
935 /* Allocate internal context for the authentication protocol. This
936 is sent as context for the protocol. */
937 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
938 proto_ctx->server = (void *)server;
939 proto_ctx->context = (void *)sconn;
940 proto_ctx->sock = sock;
941 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
942 proto_ctx->dest_id_type = ctx->dest_id_type;
943 proto_ctx->dest_id = ctx->dest_id;
945 /* Resolve the authentication method used in this connection. Check if
946 we find a match from user configured connections */
947 if (!sconn->conn.ref_ptr)
948 conn = silc_server_config_find_router_conn(server, sock->hostname,
951 conn = sconn->conn.ref_ptr;
954 /* Match found. Use the configured authentication method. Take only
955 the passphrase, since for public key auth we automatically use
956 our local key pair. */
957 if (conn->passphrase) {
958 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
959 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
961 proto_ctx->auth_data = strdup(conn->passphrase);
962 proto_ctx->auth_data_len = strlen(conn->passphrase);
963 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
965 } else if (conn->publickeys) {
966 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
968 proto_ctx->auth_meth = SILC_AUTH_NONE;
971 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
972 sock->hostname, sock->ip, sock->port));
973 silc_protocol_free(protocol);
974 sock->protocol = NULL;
976 silc_packet_context_free(ctx->packet);
978 silc_ske_free(ctx->ske);
979 silc_free(ctx->dest_id);
981 silc_server_config_unref(&sconn->conn);
982 silc_free(sconn->remote_host);
983 silc_free(sconn->backup_replace_ip);
985 silc_schedule_task_del_by_callback(server->schedule,
986 silc_server_failure_callback);
987 silc_server_disconnect_remote(server, sock,
988 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
992 /* Free old protocol as it is finished now */
993 silc_protocol_free(protocol);
995 silc_packet_context_free(ctx->packet);
997 sock->protocol = NULL;
999 /* Allocate the authentication protocol. This is allocated here
1000 but we won't start it yet. We will be receiving party of this
1001 protocol thus we will wait that connecting party will make
1002 their first move. */
1003 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1004 &sock->protocol, proto_ctx,
1005 silc_server_connect_to_router_final);
1007 /* Register timeout task. If the protocol is not executed inside
1008 this timelimit the connection will be terminated. */
1009 proto_ctx->timeout_task =
1010 silc_schedule_task_add(server->schedule, sock->sock,
1011 silc_server_timeout_remote,
1013 server->config->conn_auth_timeout, 0,
1017 /* Run the protocol */
1018 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1021 /* Finalizes the connection to router. Registers a server task to the
1022 queue so that we can accept new connections. */
1024 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1026 SilcProtocol protocol = (SilcProtocol)context;
1027 SilcServerConnAuthInternalContext *ctx =
1028 (SilcServerConnAuthInternalContext *)protocol->context;
1029 SilcServer server = (SilcServer)ctx->server;
1030 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1031 SilcSocketConnection sock = ctx->sock;
1032 SilcServerEntry id_entry;
1034 SilcServerHBContext hb_context;
1035 unsigned char *id_string;
1037 SilcIDListData idata;
1038 SilcServerConfigRouter *conn = NULL;
1039 SilcServerConfigConnParams *param = NULL;
1041 SILC_LOG_DEBUG(("Start"));
1043 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1044 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1045 /* Error occured during protocol */
1046 silc_free(ctx->dest_id);
1047 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1052 /* Add a task to the queue. This task receives new connections to the
1053 server. This task remains on the queue until the end of the program. */
1054 if (!server->listenning && !sconn->backup) {
1055 silc_schedule_task_add(server->schedule, server->sock,
1056 silc_server_accept_new_connection,
1057 (void *)server, 0, 0,
1059 SILC_TASK_PRI_NORMAL);
1060 server->listenning = TRUE;
1063 /* Send NEW_SERVER packet to the router. We will become registered
1064 to the SILC network after sending this packet. */
1065 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1066 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1067 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1068 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1069 silc_buffer_format(packet,
1070 SILC_STR_UI_SHORT(id_len),
1071 SILC_STR_UI_XNSTRING(id_string, id_len),
1072 SILC_STR_UI_SHORT(strlen(server->server_name)),
1073 SILC_STR_UI_XNSTRING(server->server_name,
1074 strlen(server->server_name)),
1077 /* Send the packet */
1078 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1079 packet->data, packet->len, TRUE);
1080 silc_buffer_free(packet);
1081 silc_free(id_string);
1083 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1085 /* Check that we do not have this ID already */
1086 id_entry = silc_idlist_find_server_by_id(server->local_list,
1087 ctx->dest_id, TRUE, NULL);
1089 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1091 id_entry = silc_idlist_find_server_by_id(server->global_list,
1092 ctx->dest_id, TRUE, NULL);
1094 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1097 SILC_LOG_DEBUG(("New server id(%s)",
1098 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1100 /* Add the connected router to global server list */
1101 id_entry = silc_idlist_add_server(server->global_list,
1102 strdup(sock->hostname),
1103 SILC_ROUTER, ctx->dest_id, NULL, sock);
1105 silc_free(ctx->dest_id);
1106 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1107 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1112 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1113 silc_free(sock->user_data);
1114 sock->user_data = (void *)id_entry;
1115 sock->type = SILC_SOCKET_TYPE_ROUTER;
1116 idata = (SilcIDListData)sock->user_data;
1117 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1119 conn = sconn->conn.ref_ptr;
1120 param = &server->config->param;
1121 if (conn && conn->param)
1122 param = conn->param;
1124 /* Perform keepalive. The `hb_context' will be freed automatically
1125 when finally calling the silc_socket_free function. */
1126 hb_context = silc_calloc(1, sizeof(*hb_context));
1127 hb_context->server = server;
1128 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1129 silc_server_perform_heartbeat,
1132 /* Register re-key timeout */
1133 idata->rekey->timeout = param->key_exchange_rekey;
1134 idata->rekey->context = (void *)server;
1135 silc_schedule_task_add(server->schedule, sock->sock,
1136 silc_server_rekey_callback,
1137 (void *)sock, idata->rekey->timeout, 0,
1138 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1140 if (!sconn->backup) {
1141 /* Mark this router our primary router if we're still standalone */
1142 if (server->standalone) {
1143 server->id_entry->router = id_entry;
1144 server->router = id_entry;
1145 server->standalone = FALSE;
1147 /* If we are router then announce our possible servers. */
1148 if (server->server_type == SILC_ROUTER)
1149 silc_server_announce_servers(server, FALSE, 0,
1150 SILC_PRIMARY_ROUTE(server));
1152 /* Announce our clients and channels to the router */
1153 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1154 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1156 #ifdef BACKUP_SINGLE_ROUTER
1157 /* If we are backup router then this primary router is whom we are
1159 if (server->server_type == SILC_BACKUP_ROUTER)
1160 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1161 #endif /* BACKUP_SINGLE_ROUTER */
1164 /* Add this server to be our backup router */
1165 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1166 sconn->backup_replace_port, FALSE);
1169 sock->protocol = NULL;
1171 /* Call the completion callback to indicate that we've connected to
1173 if (sconn->callback)
1174 (*sconn->callback)(server, id_entry, sconn->callback_context);
1177 /* Free the temporary connection data context */
1179 silc_server_config_unref(&sconn->conn);
1180 silc_free(sconn->remote_host);
1181 silc_free(sconn->backup_replace_ip);
1184 if (sconn == server->router_conn)
1185 server->router_conn = NULL;
1187 /* Free the protocol object */
1188 if (sock->protocol == protocol)
1189 sock->protocol = NULL;
1190 silc_protocol_free(protocol);
1192 silc_packet_context_free(ctx->packet);
1194 silc_ske_free(ctx->ske);
1195 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1196 silc_free(ctx->auth_data);
1200 /* Host lookup callback that is called after the incoming connection's
1201 IP and FQDN lookup is performed. This will actually check the acceptance
1202 of the incoming connection and will register the key exchange protocol
1203 for this connection. */
1206 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1209 SilcServerKEInternalContext *proto_ctx =
1210 (SilcServerKEInternalContext *)context;
1211 SilcServer server = (SilcServer)proto_ctx->server;
1212 SilcServerConfigClient *cconfig = NULL;
1213 SilcServerConfigServer *sconfig = NULL;
1214 SilcServerConfigRouter *rconfig = NULL;
1215 SilcServerConfigDeny *deny;
1218 context = (void *)server;
1220 /* Check whether we could resolve both IP and FQDN. */
1221 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1222 server->config->require_reverse_lookup)) {
1223 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1224 sock->hostname ? sock->hostname :
1225 sock->ip ? sock->ip : ""));
1226 server->stat.conn_failures++;
1227 silc_server_disconnect_remote(server, sock,
1228 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1229 "Unknown host or IP");
1230 silc_free(proto_ctx);
1234 /* Register the connection for network input and output. This sets
1235 that scheduler will listen for incoming packets for this connection
1236 and sets that outgoing packets may be sent to this connection as well.
1237 However, this doesn't set the scheduler for outgoing traffic, it
1238 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1239 later when outgoing data is available. */
1240 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1242 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1245 /* Listenning port */
1246 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1247 silc_server_disconnect_remote(server, sock,
1248 SILC_STATUS_ERR_RESOURCE_LIMIT,
1249 "Connection refused");
1250 server->stat.conn_failures++;
1251 silc_free(proto_ctx);
1254 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1256 /* Check whether this connection is denied to connect to us. */
1257 deny = silc_server_config_find_denied(server, sock->ip);
1259 deny = silc_server_config_find_denied(server, sock->hostname);
1261 /* The connection is denied */
1262 SILC_LOG_INFO(("Connection %s (%s) is denied",
1263 sock->hostname, sock->ip));
1264 silc_server_disconnect_remote(server, sock,
1265 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1267 server->stat.conn_failures++;
1268 silc_free(proto_ctx);
1272 /* Check whether we have configured this sort of connection at all. We
1273 have to check all configurations since we don't know what type of
1274 connection this is. */
1275 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1276 cconfig = silc_server_config_find_client(server, sock->hostname);
1277 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1278 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1279 if (server->server_type == SILC_ROUTER) {
1280 if (!(rconfig = silc_server_config_find_router_conn(server,
1281 sock->ip, sock->port)))
1282 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1285 if (!cconfig && !sconfig && !rconfig) {
1286 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1288 silc_server_disconnect_remote(server, sock,
1289 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1290 server->stat.conn_failures++;
1291 silc_free(proto_ctx);
1295 /* The connection is allowed */
1297 /* Set internal context for key exchange protocol. This is
1298 sent as context for the protocol. */
1299 proto_ctx->sock = sock;
1300 proto_ctx->rng = server->rng;
1301 proto_ctx->responder = TRUE;
1302 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1303 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1304 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1306 /* Take flags for key exchange. Since we do not know what type of connection
1307 this is, we go through all found configurations and use the global ones
1308 as well. This will result always into strictest key exchange flags. */
1309 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1310 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1311 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1312 if (server->config->param.key_exchange_pfs)
1313 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1315 /* Prepare the connection for key exchange protocol. We allocate the
1316 protocol but will not start it yet. The connector will be the
1317 initiator of the protocol thus we will wait for initiation from
1318 there before we start the protocol. */
1319 server->stat.auth_attempts++;
1320 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1321 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1322 &sock->protocol, proto_ctx,
1323 silc_server_accept_new_connection_second);
1325 /* Register a timeout task that will be executed if the connector
1326 will not start the key exchange protocol within specified timeout
1327 and the connection will be closed. */
1328 proto_ctx->timeout_task =
1329 silc_schedule_task_add(server->schedule, sock->sock,
1330 silc_server_timeout_remote,
1332 server->config->key_exchange_timeout, 0,
1337 /* Accepts new connections to the server. Accepting new connections are
1338 done in three parts to make it async. */
1340 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1342 SilcServer server = (SilcServer)context;
1343 SilcSocketConnection newsocket;
1344 SilcServerKEInternalContext *proto_ctx;
1347 SILC_LOG_DEBUG(("Accepting new connection"));
1349 server->stat.conn_attempts++;
1351 sock = silc_net_accept_connection(fd);
1353 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1354 server->stat.conn_failures++;
1358 /* Check for maximum allowed connections */
1359 if (sock > server->config->param.connections_max) {
1360 SILC_LOG_ERROR(("Refusing connection, server is full"));
1361 server->stat.conn_failures++;
1362 silc_net_close_connection(sock);
1366 /* Set socket options */
1367 silc_net_set_socket_nonblock(sock);
1368 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1370 /* We don't create a ID yet, since we don't know what type of connection
1371 this is yet. But, we do add the connection to the socket table. */
1372 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1373 server->sockets[sock] = newsocket;
1375 /* Perform asynchronous host lookup. This will lookup the IP and the
1376 FQDN of the remote connection. After the lookup is done the connection
1377 is accepted further. */
1378 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1379 proto_ctx->server = server;
1380 proto_ctx->context = (void *)fd;
1381 silc_socket_host_lookup(newsocket, TRUE,
1382 silc_server_accept_new_connection_lookup,
1383 (void *)proto_ctx, server->schedule);
1386 /* Second part of accepting new connection. Key exchange protocol has been
1387 performed and now it is time to do little connection authentication
1388 protocol to figure out whether this connection is client or server
1389 and whether it has right to access this server (especially server
1390 connections needs to be authenticated). */
1392 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1394 SilcProtocol protocol = (SilcProtocol)context;
1395 SilcServerKEInternalContext *ctx =
1396 (SilcServerKEInternalContext *)protocol->context;
1397 SilcServer server = (SilcServer)ctx->server;
1398 SilcSocketConnection sock = ctx->sock;
1399 SilcServerConnAuthInternalContext *proto_ctx;
1401 SILC_LOG_DEBUG(("Start"));
1403 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1404 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1405 /* Error occured during protocol */
1406 SILC_LOG_DEBUG(("Error key exchange protocol"));
1407 silc_protocol_free(protocol);
1408 sock->protocol = NULL;
1409 silc_ske_free_key_material(ctx->keymat);
1411 silc_packet_context_free(ctx->packet);
1413 silc_ske_free(ctx->ske);
1414 silc_free(ctx->dest_id);
1415 silc_server_config_unref(&ctx->cconfig);
1416 silc_server_config_unref(&ctx->sconfig);
1417 silc_server_config_unref(&ctx->rconfig);
1419 silc_schedule_task_del_by_callback(server->schedule,
1420 silc_server_failure_callback);
1421 silc_server_disconnect_remote(server, sock,
1422 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1424 server->stat.auth_failures++;
1428 /* We now have the key material as the result of the key exchange
1429 protocol. Take the key material into use. Free the raw key material
1430 as soon as we've set them into use. */
1431 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1432 ctx->sock, ctx->keymat,
1433 ctx->ske->prop->cipher,
1434 ctx->ske->prop->pkcs,
1435 ctx->ske->prop->hash,
1436 ctx->ske->prop->hmac,
1437 ctx->ske->prop->group,
1439 SILC_LOG_ERROR(("Error setting key material in use"));
1440 silc_protocol_free(protocol);
1441 sock->protocol = NULL;
1442 silc_ske_free_key_material(ctx->keymat);
1444 silc_packet_context_free(ctx->packet);
1446 silc_ske_free(ctx->ske);
1447 silc_free(ctx->dest_id);
1448 silc_server_config_unref(&ctx->cconfig);
1449 silc_server_config_unref(&ctx->sconfig);
1450 silc_server_config_unref(&ctx->rconfig);
1452 silc_schedule_task_del_by_callback(server->schedule,
1453 silc_server_failure_callback);
1454 silc_server_disconnect_remote(server, sock,
1455 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1456 server->stat.auth_failures++;
1459 silc_ske_free_key_material(ctx->keymat);
1461 /* Allocate internal context for the authentication protocol. This
1462 is sent as context for the protocol. */
1463 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1464 proto_ctx->server = (void *)server;
1465 proto_ctx->sock = sock;
1466 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1467 proto_ctx->responder = TRUE;
1468 proto_ctx->dest_id_type = ctx->dest_id_type;
1469 proto_ctx->dest_id = ctx->dest_id;
1470 proto_ctx->cconfig = ctx->cconfig;
1471 proto_ctx->sconfig = ctx->sconfig;
1472 proto_ctx->rconfig = ctx->rconfig;
1474 /* Free old protocol as it is finished now */
1475 silc_protocol_free(protocol);
1477 silc_packet_context_free(ctx->packet);
1479 sock->protocol = NULL;
1481 /* Allocate the authentication protocol. This is allocated here
1482 but we won't start it yet. We will be receiving party of this
1483 protocol thus we will wait that connecting party will make
1484 their first move. */
1485 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1486 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1487 &sock->protocol, proto_ctx,
1488 silc_server_accept_new_connection_final);
1490 /* Register timeout task. If the protocol is not executed inside
1491 this timelimit the connection will be terminated. */
1492 proto_ctx->timeout_task =
1493 silc_schedule_task_add(server->schedule, sock->sock,
1494 silc_server_timeout_remote,
1496 server->config->conn_auth_timeout, 0,
1501 /* Final part of accepting new connection. The connection has now
1502 been authenticated and keys has been exchanged. We also know whether
1503 this is client or server connection. */
1505 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1507 SilcProtocol protocol = (SilcProtocol)context;
1508 SilcServerConnAuthInternalContext *ctx =
1509 (SilcServerConnAuthInternalContext *)protocol->context;
1510 SilcServer server = (SilcServer)ctx->server;
1511 SilcSocketConnection sock = ctx->sock;
1512 SilcServerHBContext hb_context;
1513 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1515 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1517 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1518 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1519 /* Error occured during protocol */
1520 SILC_LOG_DEBUG(("Error during authentication protocol"));
1521 silc_protocol_free(protocol);
1522 sock->protocol = NULL;
1524 silc_packet_context_free(ctx->packet);
1526 silc_ske_free(ctx->ske);
1527 silc_free(ctx->dest_id);
1528 silc_server_config_unref(&ctx->cconfig);
1529 silc_server_config_unref(&ctx->sconfig);
1530 silc_server_config_unref(&ctx->rconfig);
1532 silc_schedule_task_del_by_callback(server->schedule,
1533 silc_server_failure_callback);
1534 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1536 server->stat.auth_failures++;
1540 entry->data.last_receive = time(NULL);
1542 switch (ctx->conn_type) {
1543 case SILC_SOCKET_TYPE_CLIENT:
1545 SilcClientEntry client;
1546 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1548 /* Verify whether this connection is after all allowed to connect */
1549 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1550 &server->config->param,
1551 conn->param, ctx->ske)) {
1552 server->stat.auth_failures++;
1556 SILC_LOG_DEBUG(("Remote host is client"));
1557 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1560 /* Add the client to the client ID cache. The nickname and Client ID
1561 and other information is created after we have received NEW_CLIENT
1562 packet from client. */
1563 client = silc_idlist_add_client(server->local_list,
1564 NULL, NULL, NULL, NULL, NULL, sock, 0);
1566 SILC_LOG_ERROR(("Could not add new client to cache"));
1567 silc_free(sock->user_data);
1568 silc_server_disconnect_remote(server, sock,
1569 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1570 server->stat.auth_failures++;
1575 server->stat.my_clients++;
1576 server->stat.clients++;
1577 server->stat.cell_clients++;
1579 /* Get connection parameters */
1581 if (conn->param->keepalive_secs)
1582 hearbeat_timeout = conn->param->keepalive_secs;
1585 id_entry = (void *)client;
1588 case SILC_SOCKET_TYPE_SERVER:
1589 case SILC_SOCKET_TYPE_ROUTER:
1591 SilcServerEntry new_server;
1592 bool initiator = FALSE;
1593 bool backup_local = FALSE;
1594 bool backup_router = FALSE;
1595 char *backup_replace_ip = NULL;
1596 SilcUInt16 backup_replace_port = 0;
1597 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1598 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1600 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1601 /* Verify whether this connection is after all allowed to connect */
1602 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1603 &server->config->param,
1604 rconn ? rconn->param : NULL,
1606 server->stat.auth_failures++;
1612 if (rconn->param->keepalive_secs)
1613 hearbeat_timeout = rconn->param->keepalive_secs;
1616 initiator = rconn->initiator;
1617 backup_local = rconn->backup_local;
1618 backup_router = rconn->backup_router;
1619 backup_replace_ip = rconn->backup_replace_ip;
1620 backup_replace_port = rconn->backup_replace_port;
1624 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1625 /* Verify whether this connection is after all allowed to connect */
1626 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1627 &server->config->param,
1628 sconn ? sconn->param : NULL,
1630 server->stat.auth_failures++;
1635 if (sconn->param->keepalive_secs)
1636 hearbeat_timeout = sconn->param->keepalive_secs;
1639 backup_router = sconn->backup_router;
1643 SILC_LOG_DEBUG(("Remote host is %s",
1644 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1645 "server" : (backup_router ?
1646 "backup router" : "router")));
1647 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1648 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1649 "server" : (backup_router ?
1650 "backup router" : "router")));
1652 /* Add the server into server cache. The server name and Server ID
1653 is updated after we have received NEW_SERVER packet from the
1654 server. We mark ourselves as router for this server if we really
1657 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1658 server->local_list : (backup_router ?
1659 server->local_list :
1660 server->global_list)),
1662 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1663 SILC_SERVER : SILC_ROUTER),
1665 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1666 server->id_entry : (backup_router ?
1667 server->id_entry : NULL)),
1670 SILC_LOG_ERROR(("Could not add new server to cache"));
1671 silc_free(sock->user_data);
1672 silc_server_disconnect_remote(server, sock,
1673 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1674 server->stat.auth_failures++;
1679 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1680 server->stat.my_servers++;
1682 server->stat.my_routers++;
1683 server->stat.routers++;
1685 server->stat.servers++;
1687 id_entry = (void *)new_server;
1689 /* If the incoming connection is router and marked as backup router
1690 then add it to be one of our backups */
1691 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1692 silc_server_backup_add(server, new_server, backup_replace_ip,
1693 backup_replace_port, backup_local);
1695 /* Change it back to SERVER type since that's what it really is. */
1697 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1699 new_server->server_type = SILC_BACKUP_ROUTER;
1702 /* Check whether this connection is to be our primary router connection
1703 if we do not already have the primary route. */
1704 if (!backup_router &&
1705 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1706 if (silc_server_config_is_primary_route(server) && !initiator)
1709 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1710 server->standalone = FALSE;
1711 if (!server->id_entry->router) {
1712 server->id_entry->router = id_entry;
1713 server->router = id_entry;
1724 sock->type = ctx->conn_type;
1726 /* Add the common data structure to the ID entry. */
1727 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1729 /* Add to sockets internal pointer for fast referencing */
1730 silc_free(sock->user_data);
1731 sock->user_data = id_entry;
1733 /* Connection has been fully established now. Everything is ok. */
1734 SILC_LOG_DEBUG(("New connection authenticated"));
1736 /* Perform keepalive. The `hb_context' will be freed automatically
1737 when finally calling the silc_socket_free function. */
1738 hb_context = silc_calloc(1, sizeof(*hb_context));
1739 hb_context->server = server;
1740 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1741 silc_server_perform_heartbeat,
1745 silc_schedule_task_del_by_callback(server->schedule,
1746 silc_server_failure_callback);
1747 silc_protocol_free(protocol);
1749 silc_packet_context_free(ctx->packet);
1751 silc_ske_free(ctx->ske);
1752 silc_free(ctx->dest_id);
1753 silc_server_config_unref(&ctx->cconfig);
1754 silc_server_config_unref(&ctx->sconfig);
1755 silc_server_config_unref(&ctx->rconfig);
1757 sock->protocol = NULL;
1760 /* This function is used to read packets from network and send packets to
1761 network. This is usually a generic task. */
1763 SILC_TASK_CALLBACK(silc_server_packet_process)
1765 SilcServer server = (SilcServer)context;
1766 SilcSocketConnection sock = server->sockets[fd];
1767 SilcIDListData idata;
1768 SilcCipher cipher = NULL;
1769 SilcHmac hmac = NULL;
1770 SilcUInt32 sequence = 0;
1774 SILC_LOG_DEBUG(("Unknown socket connection"));
1778 /* Packet sending */
1780 if (type == SILC_TASK_WRITE) {
1781 /* Do not send data to disconnected connection */
1782 if (SILC_IS_DISCONNECTED(sock)) {
1783 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
1787 server->stat.packets_sent++;
1789 /* Send the packet */
1790 ret = silc_packet_send(sock, TRUE);
1792 /* If returned -2 could not write to connection now, will do
1798 SILC_LOG_ERROR(("Error sending packet to connection "
1799 "%s:%d [%s]", sock->hostname, sock->port,
1800 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1801 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1802 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1807 /* The packet has been sent and now it is time to set the connection
1808 back to only for input. When there is again some outgoing data
1809 available for this connection it will be set for output as well.
1810 This call clears the output setting and sets it only for input. */
1811 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1812 SILC_UNSET_OUTBUF_PENDING(sock);
1814 silc_buffer_clear(sock->outbuf);
1818 /* Packet receiving */
1820 /* Read some data from connection */
1821 ret = silc_packet_receive(sock);
1825 SILC_LOG_ERROR(("Error receiving packet from connection "
1826 "%s:%d [%s] %s", sock->hostname, sock->port,
1827 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1828 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1829 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1830 "Router"), strerror(errno)));
1836 SILC_LOG_DEBUG(("Read EOF"));
1838 /* If connection is disconnecting already we will finally
1839 close the connection */
1840 if (SILC_IS_DISCONNECTING(sock)) {
1841 if (sock->user_data)
1842 silc_server_free_sock_user_data(server, sock, NULL);
1843 silc_server_close_connection(server, sock);
1847 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1848 SILC_SET_DISCONNECTING(sock);
1850 if (sock->user_data) {
1852 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1853 silc_server_free_sock_user_data(server, sock, tmp);
1855 silc_server_free_sock_user_data(server, sock, NULL);
1856 } else if (server->router_conn && server->router_conn->sock == sock &&
1857 !server->router && server->standalone)
1858 silc_schedule_task_add(server->schedule, 0,
1859 silc_server_connect_to_router,
1862 SILC_TASK_PRI_NORMAL);
1864 silc_server_close_connection(server, sock);
1868 /* If connection is disconnecting or disconnected we will ignore
1870 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1871 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1875 server->stat.packets_received++;
1877 /* Get keys and stuff from ID entry */
1878 idata = (SilcIDListData)sock->user_data;
1880 cipher = idata->receive_key;
1881 hmac = idata->hmac_receive;
1882 sequence = idata->psn_receive;
1885 /* Process the packet. This will call the parser that will then
1886 decrypt and parse the packet. */
1887 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1888 TRUE : FALSE, cipher, hmac, sequence,
1889 silc_server_packet_parse, server);
1891 /* If this socket connection is not authenticated yet and the packet
1892 processing failed we will drop the connection since it can be
1893 a malicious flooder. */
1894 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1895 (!sock->protocol || sock->protocol->protocol->type ==
1896 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1897 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1898 SILC_SET_DISCONNECTING(sock);
1900 if (sock->user_data)
1901 silc_server_free_sock_user_data(server, sock, NULL);
1902 silc_server_close_connection(server, sock);
1906 /* Parses whole packet, received earlier. */
1908 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1910 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1911 SilcServer server = (SilcServer)parse_ctx->context;
1912 SilcSocketConnection sock = parse_ctx->sock;
1913 SilcPacketContext *packet = parse_ctx->packet;
1914 SilcIDListData idata = (SilcIDListData)sock->user_data;
1917 /* Parse the packet */
1918 if (parse_ctx->normal)
1919 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1921 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1923 /* If entry is disabled ignore what we got. */
1924 if (ret != SILC_PACKET_RESUME_ROUTER &&
1925 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1926 SILC_LOG_DEBUG(("Connection is disabled"));
1930 if (ret == SILC_PACKET_NONE) {
1931 SILC_LOG_DEBUG(("Error parsing packet"));
1935 /* Check that the the current client ID is same as in the client's packet. */
1936 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1937 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1938 if (client && client->id) {
1939 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1940 packet->src_id_type);
1941 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1943 SILC_LOG_DEBUG(("Packet source is not same as sender"));
1950 if (server->server_type == SILC_ROUTER) {
1951 /* Route the packet if it is not destined to us. Other ID types but
1952 server are handled separately after processing them. */
1953 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1954 packet->dst_id_type == SILC_ID_SERVER &&
1955 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1956 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1958 /* Route the packet to fastest route for the destination ID */
1959 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1960 packet->dst_id_type);
1963 silc_server_packet_route(server,
1964 silc_server_route_get(server, id,
1965 packet->dst_id_type),
1972 /* Parse the incoming packet type */
1973 silc_server_packet_parse_type(server, sock, packet);
1975 /* Broadcast packet if it is marked as broadcast packet and it is
1976 originated from router and we are router. */
1977 if (server->server_type == SILC_ROUTER &&
1978 sock->type == SILC_SOCKET_TYPE_ROUTER &&
1979 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1980 /* Broadcast to our primary route */
1981 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
1983 /* If we have backup routers then we need to feed all broadcast
1984 data to those servers. */
1985 silc_server_backup_broadcast(server, sock, packet);
1989 silc_packet_context_free(packet);
1990 silc_free(parse_ctx);
1993 /* Parser callback called by silc_packet_receive_process. This merely
1994 registers timeout that will handle the actual parsing when appropriate. */
1996 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1999 SilcServer server = (SilcServer)context;
2000 SilcSocketConnection sock = parser_context->sock;
2001 SilcIDListData idata = (SilcIDListData)sock->user_data;
2004 idata->psn_receive = parser_context->packet->sequence + 1;
2006 /* If protocol for this connection is key exchange or rekey then we'll
2007 process all packets synchronously, since there might be packets in
2008 queue that we are not able to decrypt without first processing the
2009 packets before them. */
2010 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2011 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2012 (sock->protocol && sock->protocol->protocol &&
2013 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2014 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2015 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2018 /* Reprocess data since we'll return FALSE here. This is because
2019 the idata->receive_key might have become valid in the last packet
2020 and we want to call this processor with valid cipher. */
2022 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2023 TRUE : FALSE, idata->receive_key,
2024 idata->hmac_receive, idata->psn_receive,
2025 silc_server_packet_parse, server);
2027 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2028 TRUE : FALSE, NULL, NULL, 0,
2029 silc_server_packet_parse, server);
2033 switch (sock->type) {
2034 case SILC_SOCKET_TYPE_UNKNOWN:
2035 case SILC_SOCKET_TYPE_CLIENT:
2036 /* Parse the packet with timeout */
2037 silc_schedule_task_add(server->schedule, sock->sock,
2038 silc_server_packet_parse_real,
2039 (void *)parser_context, 0, 100000,
2041 SILC_TASK_PRI_NORMAL);
2043 case SILC_SOCKET_TYPE_SERVER:
2044 case SILC_SOCKET_TYPE_ROUTER:
2045 /* Packets from servers are parsed immediately */
2046 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2056 /* Parses the packet type and calls what ever routines the packet type
2057 requires. This is done for all incoming packets. */
2059 void silc_server_packet_parse_type(SilcServer server,
2060 SilcSocketConnection sock,
2061 SilcPacketContext *packet)
2063 SilcPacketType type = packet->type;
2064 SilcIDListData idata = (SilcIDListData)sock->user_data;
2066 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2067 silc_get_packet_name(type), packet->flags));
2069 /* Parse the packet type */
2071 case SILC_PACKET_DISCONNECT:
2074 char *message = NULL;
2076 if (packet->flags & SILC_PACKET_FLAG_LIST)
2078 if (packet->buffer->len < 1)
2081 status = (SilcStatus)packet->buffer->data[0];
2082 if (packet->buffer->len > 1 &&
2083 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2084 message = silc_memdup(packet->buffer->data + 1,
2085 packet->buffer->len - 1);
2087 SILC_LOG_ERROR(("Disconnected by %s (%s): %s (%d) %s",
2088 sock->ip, sock->hostname,
2089 silc_get_status_message(status), status,
2090 message ? message : ""));
2095 case SILC_PACKET_SUCCESS:
2097 * Success received for something. For now we can have only
2098 * one protocol for connection executing at once hence this
2099 * success message is for whatever protocol is executing currently.
2101 if (packet->flags & SILC_PACKET_FLAG_LIST)
2104 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2107 case SILC_PACKET_FAILURE:
2109 * Failure received for something. For now we can have only
2110 * one protocol for connection executing at once hence this
2111 * failure message is for whatever protocol is executing currently.
2113 if (packet->flags & SILC_PACKET_FLAG_LIST)
2115 if (sock->protocol) {
2116 SilcServerFailureContext f;
2117 f = silc_calloc(1, sizeof(*f));
2121 /* We will wait 5 seconds to process this failure packet */
2122 silc_schedule_task_add(server->schedule, sock->sock,
2123 silc_server_failure_callback, (void *)f, 5, 0,
2124 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2128 case SILC_PACKET_REJECT:
2129 if (packet->flags & SILC_PACKET_FLAG_LIST)
2134 case SILC_PACKET_NOTIFY:
2136 * Received notify packet. Server can receive notify packets from
2137 * router. Server then relays the notify messages to clients if needed.
2139 if (packet->flags & SILC_PACKET_FLAG_LIST)
2140 silc_server_notify_list(server, sock, packet);
2142 silc_server_notify(server, sock, packet);
2148 case SILC_PACKET_CHANNEL_MESSAGE:
2150 * Received channel message. Channel messages are special packets
2151 * (although probably most common ones) thus they are handled
2154 if (packet->flags & SILC_PACKET_FLAG_LIST)
2156 idata->last_receive = time(NULL);
2157 silc_server_channel_message(server, sock, packet);
2160 case SILC_PACKET_CHANNEL_KEY:
2162 * Received key for channel. As channels are created by the router
2163 * the keys are as well. We will distribute the key to all of our
2164 * locally connected clients on the particular channel. Router
2165 * never receives this channel and thus is ignored.
2167 if (packet->flags & SILC_PACKET_FLAG_LIST)
2169 silc_server_channel_key(server, sock, packet);
2175 case SILC_PACKET_COMMAND:
2177 * Recived command. Processes the command request and allocates the
2178 * command context and calls the command.
2180 if (packet->flags & SILC_PACKET_FLAG_LIST)
2182 silc_server_command_process(server, sock, packet);
2185 case SILC_PACKET_COMMAND_REPLY:
2187 * Received command reply packet. Received command reply to command. It
2188 * may be reply to command sent by us or reply to command sent by client
2189 * that we've routed further.
2191 if (packet->flags & SILC_PACKET_FLAG_LIST)
2193 silc_server_command_reply(server, sock, packet);
2197 * Private Message packets
2199 case SILC_PACKET_PRIVATE_MESSAGE:
2201 * Received private message packet. The packet is coming from either
2204 if (packet->flags & SILC_PACKET_FLAG_LIST)
2206 idata->last_receive = time(NULL);
2207 silc_server_private_message(server, sock, packet);
2210 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2212 * Private message key packet.
2214 if (packet->flags & SILC_PACKET_FLAG_LIST)
2216 silc_server_private_message_key(server, sock, packet);
2220 * Key Exchange protocol packets
2222 case SILC_PACKET_KEY_EXCHANGE:
2223 if (packet->flags & SILC_PACKET_FLAG_LIST)
2226 if (sock->protocol && sock->protocol->protocol &&
2227 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2228 SilcServerKEInternalContext *proto_ctx =
2229 (SilcServerKEInternalContext *)sock->protocol->context;
2231 proto_ctx->packet = silc_packet_context_dup(packet);
2233 /* Let the protocol handle the packet */
2234 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2236 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2237 "protocol active, packet dropped."));
2241 case SILC_PACKET_KEY_EXCHANGE_1:
2242 if (packet->flags & SILC_PACKET_FLAG_LIST)
2245 if (sock->protocol && sock->protocol->protocol &&
2246 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2247 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2249 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2250 SilcServerRekeyInternalContext *proto_ctx =
2251 (SilcServerRekeyInternalContext *)sock->protocol->context;
2253 if (proto_ctx->packet)
2254 silc_packet_context_free(proto_ctx->packet);
2256 proto_ctx->packet = silc_packet_context_dup(packet);
2258 /* Let the protocol handle the packet */
2259 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2261 SilcServerKEInternalContext *proto_ctx =
2262 (SilcServerKEInternalContext *)sock->protocol->context;
2264 if (proto_ctx->packet)
2265 silc_packet_context_free(proto_ctx->packet);
2267 proto_ctx->packet = silc_packet_context_dup(packet);
2268 proto_ctx->dest_id_type = packet->src_id_type;
2269 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2270 packet->src_id_type);
2271 if (!proto_ctx->dest_id)
2274 /* Let the protocol handle the packet */
2275 silc_protocol_execute(sock->protocol, server->schedule,
2279 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2280 "protocol active, packet dropped."));
2284 case SILC_PACKET_KEY_EXCHANGE_2:
2285 if (packet->flags & SILC_PACKET_FLAG_LIST)
2288 if (sock->protocol && sock->protocol->protocol &&
2289 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2290 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2292 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2293 SilcServerRekeyInternalContext *proto_ctx =
2294 (SilcServerRekeyInternalContext *)sock->protocol->context;
2296 if (proto_ctx->packet)
2297 silc_packet_context_free(proto_ctx->packet);
2299 proto_ctx->packet = silc_packet_context_dup(packet);
2301 /* Let the protocol handle the packet */
2302 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2304 SilcServerKEInternalContext *proto_ctx =
2305 (SilcServerKEInternalContext *)sock->protocol->context;
2307 if (proto_ctx->packet)
2308 silc_packet_context_free(proto_ctx->packet);
2310 proto_ctx->packet = silc_packet_context_dup(packet);
2311 proto_ctx->dest_id_type = packet->src_id_type;
2312 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2313 packet->src_id_type);
2314 if (!proto_ctx->dest_id)
2317 /* Let the protocol handle the packet */
2318 silc_protocol_execute(sock->protocol, server->schedule,
2322 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2323 "protocol active, packet dropped."));
2327 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2329 * Connection authentication request packet. When we receive this packet
2330 * we will send to the other end information about our mandatory
2331 * authentication method for the connection. This packet maybe received
2334 if (packet->flags & SILC_PACKET_FLAG_LIST)
2336 silc_server_connection_auth_request(server, sock, packet);
2340 * Connection Authentication protocol packets
2342 case SILC_PACKET_CONNECTION_AUTH:
2343 /* Start of the authentication protocol. We receive here the
2344 authentication data and will verify it. */
2345 if (packet->flags & SILC_PACKET_FLAG_LIST)
2348 if (sock->protocol && sock->protocol->protocol->type
2349 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2351 SilcServerConnAuthInternalContext *proto_ctx =
2352 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2354 proto_ctx->packet = silc_packet_context_dup(packet);
2356 /* Let the protocol handle the packet */
2357 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2359 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2360 "protocol active, packet dropped."));
2364 case SILC_PACKET_NEW_ID:
2366 * Received New ID packet. This includes some new ID that has been
2367 * created. It may be for client, server or channel. This is the way
2368 * to distribute information about new registered entities in the
2371 if (packet->flags & SILC_PACKET_FLAG_LIST)
2372 silc_server_new_id_list(server, sock, packet);
2374 silc_server_new_id(server, sock, packet);
2377 case SILC_PACKET_NEW_CLIENT:
2379 * Received new client packet. This includes client information that
2380 * we will use to create initial client ID. After creating new
2381 * ID we will send it to the client.
2383 if (packet->flags & SILC_PACKET_FLAG_LIST)
2385 silc_server_new_client(server, sock, packet);
2388 case SILC_PACKET_NEW_SERVER:
2390 * Received new server packet. This includes Server ID and some other
2391 * information that we may save. This is received after server has
2394 if (packet->flags & SILC_PACKET_FLAG_LIST)
2396 silc_server_new_server(server, sock, packet);
2399 case SILC_PACKET_NEW_CHANNEL:
2401 * Received new channel packet. Information about new channel in the
2402 * network are distributed using this packet.
2404 if (packet->flags & SILC_PACKET_FLAG_LIST)
2405 silc_server_new_channel_list(server, sock, packet);
2407 silc_server_new_channel(server, sock, packet);
2410 case SILC_PACKET_HEARTBEAT:
2412 * Received heartbeat.
2414 if (packet->flags & SILC_PACKET_FLAG_LIST)
2418 case SILC_PACKET_KEY_AGREEMENT:
2420 * Received heartbeat.
2422 if (packet->flags & SILC_PACKET_FLAG_LIST)
2424 silc_server_key_agreement(server, sock, packet);
2427 case SILC_PACKET_REKEY:
2429 * Received re-key packet. The sender wants to regenerate the session
2432 if (packet->flags & SILC_PACKET_FLAG_LIST)
2434 silc_server_rekey(server, sock, packet);
2437 case SILC_PACKET_REKEY_DONE:
2439 * The re-key is done.
2441 if (packet->flags & SILC_PACKET_FLAG_LIST)
2444 if (sock->protocol && sock->protocol->protocol &&
2445 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2447 SilcServerRekeyInternalContext *proto_ctx =
2448 (SilcServerRekeyInternalContext *)sock->protocol->context;
2450 if (proto_ctx->packet)
2451 silc_packet_context_free(proto_ctx->packet);
2453 proto_ctx->packet = silc_packet_context_dup(packet);
2455 /* Let the protocol handle the packet */
2456 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2458 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2459 "protocol active, packet dropped."));
2463 case SILC_PACKET_FTP:
2465 if (packet->flags & SILC_PACKET_FLAG_LIST)
2467 silc_server_ftp(server, sock, packet);
2470 case SILC_PACKET_RESUME_CLIENT:
2472 if (packet->flags & SILC_PACKET_FLAG_LIST)
2474 silc_server_resume_client(server, sock, packet);
2477 case SILC_PACKET_RESUME_ROUTER:
2478 /* Resume router packet received. This packet is received for backup
2479 router resuming protocol. */
2480 if (packet->flags & SILC_PACKET_FLAG_LIST)
2482 silc_server_backup_resume_router(server, sock, packet);
2486 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2491 /* Creates connection to a remote router. */
2493 void silc_server_create_connection(SilcServer server,
2494 const char *remote_host, SilcUInt32 port)
2496 SilcServerConnection sconn;
2498 /* Allocate connection object for hold connection specific stuff. */
2499 sconn = silc_calloc(1, sizeof(*sconn));
2500 sconn->server = server;
2501 sconn->remote_host = strdup(remote_host);
2502 sconn->remote_port = port;
2503 sconn->no_reconnect = TRUE;
2505 silc_schedule_task_add(server->schedule, 0,
2506 silc_server_connect_router,
2507 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2508 SILC_TASK_PRI_NORMAL);
2511 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2513 silc_socket_free((SilcSocketConnection)context);
2516 /* Closes connection to socket connection */
2518 void silc_server_close_connection(SilcServer server,
2519 SilcSocketConnection sock)
2521 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2522 silc_socket_free(sock);
2526 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2528 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2529 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2530 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2533 /* We won't listen for this connection anymore */
2534 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2536 /* Unregister all tasks */
2537 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2539 /* Close the actual connection */
2540 silc_net_close_connection(sock->sock);
2541 server->sockets[sock->sock] = NULL;
2543 /* If sock->user_data is NULL then we'll check for active protocols
2544 here since the silc_server_free_sock_user_data has not been called
2545 for this connection. */
2546 if (!sock->user_data) {
2547 /* If any protocol is active cancel its execution. It will call
2548 the final callback which will finalize the disconnection. */
2549 if (sock->protocol) {
2550 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2551 silc_protocol_cancel(sock->protocol, server->schedule);
2552 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2553 silc_protocol_execute_final(sock->protocol, server->schedule);
2554 sock->protocol = NULL;
2559 silc_schedule_task_add(server->schedule, 0,
2560 silc_server_close_connection_final,
2561 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2562 SILC_TASK_PRI_NORMAL);
2565 /* Sends disconnect message to remote connection and disconnects the
2568 void silc_server_disconnect_remote(SilcServer server,
2569 SilcSocketConnection sock,
2570 SilcStatus status, ...)
2573 unsigned char buf[512];
2581 memset(buf, 0, sizeof(buf));
2582 va_start(ap, status);
2583 cp = va_arg(ap, char *);
2585 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2590 SILC_LOG_DEBUG(("Disconnecting remote host"));
2592 /* Notify remote end that the conversation is over. The notify message
2593 is tried to be sent immediately. */
2597 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2599 buffer = silc_buffer_alloc_size(len);
2603 buffer->data[0] = status;
2605 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2607 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2608 buffer->data, buffer->len, TRUE);
2609 silc_buffer_free(buffer);
2612 silc_server_packet_queue_purge(server, sock);
2614 /* Mark the connection to be disconnected */
2615 SILC_SET_DISCONNECTED(sock);
2616 silc_server_close_connection(server, sock);
2621 SilcClientEntry client;
2622 } *FreeClientInternal;
2624 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2626 FreeClientInternal i = (FreeClientInternal)context;
2628 silc_idlist_del_data(i->client);
2629 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2633 /* Frees client data and notifies about client's signoff. */
2635 void silc_server_free_client_data(SilcServer server,
2636 SilcSocketConnection sock,
2637 SilcClientEntry client,
2639 const char *signoff)
2641 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2643 SILC_LOG_DEBUG(("Freeing client data"));
2646 if (!client->router && !client->connection &&
2647 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2648 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2649 SILC_LOG_ERROR(("****** Contact Pekka"));
2650 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2655 /* If there is pending outgoing data for the client then purge it
2656 to the network before removing the client entry. */
2657 silc_server_packet_queue_purge(server, sock);
2660 /* Check if anyone is watching this nickname */
2661 if (server->server_type == SILC_ROUTER)
2662 silc_server_check_watcher_list(server, client, NULL,
2663 SILC_NOTIFY_TYPE_SIGNOFF);
2665 /* Send SIGNOFF notify to routers. */
2667 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2668 SILC_BROADCAST(server), client->id,
2672 /* Remove client from all channels */
2674 silc_server_remove_from_channels(server, NULL, client,
2675 TRUE, (char *)signoff, TRUE);
2677 silc_server_remove_from_channels(server, NULL, client,
2678 FALSE, NULL, FALSE);
2680 /* Remove this client from watcher list if it is */
2681 silc_server_del_from_watcher_list(server, client);
2683 /* Update statistics */
2684 server->stat.my_clients--;
2685 server->stat.clients--;
2686 if (server->stat.cell_clients)
2687 server->stat.cell_clients--;
2688 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2689 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2690 silc_schedule_task_del_by_context(server->schedule, client);
2692 /* We will not delete the client entry right away. We will take it
2693 into history (for WHOWAS command) for 5 minutes */
2696 silc_schedule_task_add(server->schedule, 0,
2697 silc_server_free_client_data_timeout,
2699 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2700 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2702 client->router = NULL;
2703 client->connection = NULL;
2706 /* Frees user_data pointer from socket connection object. This also sends
2707 appropriate notify packets to the network to inform about leaving
2710 void silc_server_free_sock_user_data(SilcServer server,
2711 SilcSocketConnection sock,
2712 const char *signoff_message)
2714 switch (sock->type) {
2715 case SILC_SOCKET_TYPE_CLIENT:
2717 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2718 silc_server_free_client_data(server, sock, user_data, TRUE,
2722 case SILC_SOCKET_TYPE_SERVER:
2723 case SILC_SOCKET_TYPE_ROUTER:
2725 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2726 SilcServerEntry backup_router = NULL;
2728 SILC_LOG_DEBUG(("Freeing server data"));
2731 backup_router = silc_server_backup_get(server, user_data->id);
2733 /* If this was our primary router connection then we're lost to
2734 the outside world. */
2735 if (server->router == user_data) {
2736 /* Check whether we have a backup router connection */
2737 if (!backup_router || backup_router == user_data) {
2738 silc_schedule_task_add(server->schedule, 0,
2739 silc_server_connect_to_router,
2742 SILC_TASK_PRI_NORMAL);
2744 server->id_entry->router = NULL;
2745 server->router = NULL;
2746 server->standalone = TRUE;
2747 backup_router = NULL;
2749 SILC_LOG_INFO(("New primary router is backup router %s",
2750 backup_router->server_name));
2751 SILC_LOG_DEBUG(("New primary router is backup router %s",
2752 backup_router->server_name));
2753 #ifdef BACKUP_SINGLE_ROUTER
2754 if (server->id_entry != backup_router) {
2755 #endif /* BACKUP_SINGLE_ROUTER */
2756 server->id_entry->router = backup_router;
2757 server->router = backup_router;
2758 server->router_connect = time(0);
2759 server->backup_primary = TRUE;
2760 #ifdef BACKUP_SINGLE_ROUTER
2762 server->id_entry->router = NULL;
2763 server->router = NULL;
2764 server->standalone = TRUE;
2766 #endif /* BACKUP_SINGLE_ROUTER */
2768 if (server->server_type == SILC_BACKUP_ROUTER) {
2769 server->server_type = SILC_ROUTER;
2771 /* We'll need to constantly try to reconnect to the primary
2772 router so that we'll see when it comes back online. */
2773 silc_server_backup_reconnect(server, sock->ip, sock->port,
2774 silc_server_backup_connected,
2778 /* Mark this connection as replaced */
2779 silc_server_backup_replaced_add(server, user_data->id,
2782 } else if (backup_router) {
2783 SILC_LOG_INFO(("Enabling the use of backup router %s",
2784 backup_router->server_name));
2785 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2786 backup_router->server_name));
2788 /* Mark this connection as replaced */
2789 silc_server_backup_replaced_add(server, user_data->id,
2793 if (!backup_router) {
2794 /* Free all client entries that this server owns as they will
2795 become invalid now as well. */
2797 silc_server_remove_clients_by_server(server, user_data, TRUE);
2798 if (server->server_type == SILC_SERVER)
2799 silc_server_remove_channels_by_server(server, user_data);
2801 /* Update the client entries of this server to the new backup
2802 router. This also removes the clients that *really* was owned
2803 by the primary router and went down with the router. */
2804 silc_server_update_clients_by_server(server, user_data, backup_router,
2806 silc_server_update_servers_by_server(server, user_data, backup_router);
2807 if (server->server_type == SILC_SERVER)
2808 silc_server_update_channels_by_server(server, user_data,
2812 /* Free the server entry */
2813 silc_server_backup_del(server, user_data);
2814 silc_server_backup_replaced_del(server, user_data);
2815 silc_idlist_del_data(user_data);
2816 if (!silc_idlist_del_server(server->local_list, user_data))
2817 silc_idlist_del_server(server->global_list, user_data);
2818 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
2819 server->stat.my_servers--;
2821 server->stat.my_routers--;
2822 server->stat.routers--;
2824 server->stat.servers--;
2825 if (server->server_type == SILC_ROUTER)
2826 server->stat.cell_servers--;
2828 if (backup_router) {
2829 /* Announce all of our stuff that was created about 5 minutes ago.
2830 The backup router knows all the other stuff already. */
2831 if (server->server_type == SILC_ROUTER)
2832 silc_server_announce_servers(server, FALSE, time(0) - 300,
2833 backup_router->connection);
2835 /* Announce our clients and channels to the router */
2836 silc_server_announce_clients(server, time(0) - 300,
2837 backup_router->connection);
2838 silc_server_announce_channels(server, time(0) - 300,
2839 backup_router->connection);
2845 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2847 SILC_LOG_DEBUG(("Freeing unknown connection data"));
2849 silc_idlist_del_data(user_data);
2850 silc_free(user_data);
2855 /* If any protocol is active cancel its execution */
2856 if (sock->protocol) {
2857 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2858 silc_protocol_cancel(sock->protocol, server->schedule);
2859 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2860 silc_protocol_execute_final(sock->protocol, server->schedule);
2861 sock->protocol = NULL;
2864 sock->user_data = NULL;
2867 /* Removes client from all channels it has joined. This is used when client
2868 connection is disconnected. If the client on a channel is last, the
2869 channel is removed as well. This sends the SIGNOFF notify types. */
2871 void silc_server_remove_from_channels(SilcServer server,
2872 SilcSocketConnection sock,
2873 SilcClientEntry client,
2875 const char *signoff_message,
2878 SilcChannelEntry channel;
2879 SilcChannelClientEntry chl;
2880 SilcHashTableList htl;
2881 SilcBuffer clidp = NULL;
2886 SILC_LOG_DEBUG(("Removing client from joined channels"));
2888 if (notify && !client->id)
2892 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2897 /* Remove the client from all channels. The client is removed from
2898 the channels' user list. */
2899 silc_hash_table_list(client->channels, &htl);
2900 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2901 channel = chl->channel;
2903 /* Remove channel if this is last client leaving the channel, unless
2904 the channel is permanent. */
2905 if (server->server_type == SILC_ROUTER &&
2906 silc_hash_table_count(channel->user_list) < 2) {
2907 silc_server_channel_delete(server, channel);
2911 silc_hash_table_del(client->channels, channel);
2912 silc_hash_table_del(channel->user_list, chl->client);
2913 channel->user_count--;
2915 /* If there is no global users on the channel anymore mark the channel
2916 as local channel. Do not check if the removed client is local client. */
2917 if (server->server_type != SILC_ROUTER && channel->global_users &&
2918 chl->client->router && !silc_server_channel_has_global(channel))
2919 channel->global_users = FALSE;
2923 /* Update statistics */
2924 if (client->connection)
2925 server->stat.my_chanclients--;
2926 if (server->server_type == SILC_ROUTER) {
2927 server->stat.cell_chanclients--;
2928 server->stat.chanclients--;
2931 /* If there is not at least one local user on the channel then we don't
2932 need the channel entry anymore, we can remove it safely, unless the
2933 channel is permanent channel */
2934 if (server->server_type != SILC_ROUTER &&
2935 !silc_server_channel_has_local(channel)) {
2936 /* Notify about leaving client if this channel has global users. */
2937 if (notify && channel->global_users)
2938 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2939 SILC_NOTIFY_TYPE_SIGNOFF,
2940 signoff_message ? 2 : 1,
2941 clidp->data, clidp->len,
2942 signoff_message, signoff_message ?
2943 strlen(signoff_message) : 0);
2945 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2946 silc_server_channel_delete(server, channel);
2950 /* Send notify to channel about client leaving SILC and channel too */
2952 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2953 SILC_NOTIFY_TYPE_SIGNOFF,
2954 signoff_message ? 2 : 1,
2955 clidp->data, clidp->len,
2956 signoff_message, signoff_message ?
2957 strlen(signoff_message) : 0);
2959 /* Re-generate channel key if needed */
2960 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2961 if (!silc_server_create_channel_key(server, channel, 0))
2964 /* Send the channel key to the channel. The key of course is not sent
2965 to the client who was removed from the channel. */
2966 silc_server_send_channel_key(server, client->connection, channel,
2967 server->server_type == SILC_ROUTER ?
2968 FALSE : !server->standalone);
2972 silc_hash_table_list_reset(&htl);
2974 silc_buffer_free(clidp);
2977 /* Removes client from one channel. This is used for example when client
2978 calls LEAVE command to remove itself from the channel. Returns TRUE
2979 if channel still exists and FALSE if the channel is removed when
2980 last client leaves the channel. If `notify' is FALSE notify messages
2983 bool silc_server_remove_from_one_channel(SilcServer server,
2984 SilcSocketConnection sock,
2985 SilcChannelEntry channel,
2986 SilcClientEntry client,
2989 SilcChannelClientEntry chl;
2992 SILC_LOG_DEBUG(("Removing %s from channel %s",
2993 silc_id_render(client->id, SILC_ID_CLIENT),
2994 channel->channel_name));
2996 /* Get the entry to the channel, if this client is not on the channel
2998 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3001 /* Remove channel if this is last client leaving the channel, unless
3002 the channel is permanent. */
3003 if (server->server_type == SILC_ROUTER &&
3004 silc_hash_table_count(channel->user_list) < 2) {
3005 silc_server_channel_delete(server, channel);
3009 silc_hash_table_del(client->channels, chl->channel);
3010 silc_hash_table_del(channel->user_list, chl->client);
3011 channel->user_count--;
3013 /* If there is no global users on the channel anymore mark the channel
3014 as local channel. Do not check if the client is local client. */
3015 if (server->server_type != SILC_ROUTER && channel->global_users &&
3016 chl->client->router && !silc_server_channel_has_global(channel))
3017 channel->global_users = FALSE;
3021 /* Update statistics */
3022 if (client->connection)
3023 server->stat.my_chanclients--;
3024 if (server->server_type == SILC_ROUTER) {
3025 server->stat.cell_chanclients--;
3026 server->stat.chanclients--;
3029 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3033 /* If there is not at least one local user on the channel then we don't
3034 need the channel entry anymore, we can remove it safely, unless the
3035 channel is permanent channel */
3036 if (server->server_type != SILC_ROUTER &&
3037 !silc_server_channel_has_local(channel)) {
3038 /* Notify about leaving client if this channel has global users. */
3039 if (notify && channel->global_users)
3040 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3041 SILC_NOTIFY_TYPE_LEAVE, 1,
3042 clidp->data, clidp->len);
3044 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3045 silc_server_channel_delete(server, channel);
3046 silc_buffer_free(clidp);
3050 /* Send notify to channel about client leaving the channel */
3052 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3053 SILC_NOTIFY_TYPE_LEAVE, 1,
3054 clidp->data, clidp->len);
3056 silc_buffer_free(clidp);
3060 /* Timeout callback. This is called if connection is idle or for some
3061 other reason is not responding within some period of time. This
3062 disconnects the remote end. */
3064 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3066 SilcServer server = (SilcServer)context;
3067 SilcSocketConnection sock = server->sockets[fd];
3068 SilcProtocolType protocol = 0;
3070 SILC_LOG_DEBUG(("Start"));
3075 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3076 sock->hostname, sock->ip));
3078 /* If we have protocol active we must assure that we call the protocol's
3079 final callback so that all the memory is freed. */
3080 if (sock->protocol) {
3081 protocol = sock->protocol->protocol->type;
3082 silc_protocol_cancel(sock->protocol, server->schedule);
3083 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3084 silc_protocol_execute_final(sock->protocol, server->schedule);
3085 sock->protocol = NULL;
3089 if (sock->user_data)
3090 silc_server_free_sock_user_data(server, sock, NULL);
3092 silc_server_disconnect_remote(server, sock,
3094 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3095 SILC_STATUS_ERR_AUTH_FAILED :
3096 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3097 "Connection timeout");
3100 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3101 function may be used only by router. In real SILC network all channels
3102 are created by routers thus this function is never used by normal
3105 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3106 SilcServerID *router_id,
3112 SilcChannelID *channel_id;
3113 SilcChannelEntry entry;
3117 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3120 cipher = SILC_DEFAULT_CIPHER;
3122 hmac = SILC_DEFAULT_HMAC;
3124 /* Allocate cipher */
3125 if (!silc_cipher_alloc(cipher, &key))
3129 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3130 silc_cipher_free(key);
3134 channel_name = strdup(channel_name);
3136 /* Create the channel ID */
3137 if (!silc_id_create_channel_id(server, router_id, server->rng,
3139 silc_free(channel_name);
3140 silc_cipher_free(key);
3141 silc_hmac_free(newhmac);
3145 /* Create the channel */
3146 entry = silc_idlist_add_channel(server->local_list, channel_name,
3147 SILC_CHANNEL_MODE_NONE, channel_id,
3148 NULL, key, newhmac, 0);
3150 silc_free(channel_name);
3151 silc_cipher_free(key);
3152 silc_hmac_free(newhmac);
3153 silc_free(channel_id);
3157 entry->cipher = strdup(cipher);
3158 entry->hmac_name = strdup(hmac);
3160 /* Now create the actual key material */
3161 if (!silc_server_create_channel_key(server, entry,
3162 silc_cipher_get_key_len(key) / 8)) {
3163 silc_idlist_del_channel(server->local_list, entry);
3167 /* Notify other routers about the new channel. We send the packet
3168 to our primary route. */
3170 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3171 channel_name, entry->id,
3172 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3175 /* Distribute to backup routers */
3176 if (broadcast && server->server_type == SILC_ROUTER) {
3179 SilcUInt32 name_len = strlen(channel_name);
3180 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3181 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3183 packet = silc_channel_payload_encode(channel_name, name_len,
3184 cid, channel_id_len, entry->mode);
3185 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3186 packet->data, packet->len, FALSE, TRUE);
3188 silc_buffer_free(packet);
3191 server->stat.my_channels++;
3192 if (server->server_type == SILC_ROUTER) {
3193 server->stat.channels++;
3194 server->stat.cell_channels++;
3195 entry->users_resolved = TRUE;
3201 /* Same as above but creates the channel with Channel ID `channel_id. */
3204 silc_server_create_new_channel_with_id(SilcServer server,
3208 SilcChannelID *channel_id,
3211 SilcChannelEntry entry;
3215 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3218 cipher = SILC_DEFAULT_CIPHER;
3220 hmac = SILC_DEFAULT_HMAC;
3222 /* Allocate cipher */
3223 if (!silc_cipher_alloc(cipher, &key))
3227 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3228 silc_cipher_free(key);
3232 channel_name = strdup(channel_name);
3234 /* Create the channel */
3235 entry = silc_idlist_add_channel(server->local_list, channel_name,
3236 SILC_CHANNEL_MODE_NONE, channel_id,
3237 NULL, key, newhmac, 0);
3239 silc_cipher_free(key);
3240 silc_hmac_free(newhmac);
3241 silc_free(channel_name);
3245 /* Now create the actual key material */
3246 if (!silc_server_create_channel_key(server, entry,
3247 silc_cipher_get_key_len(key) / 8)) {
3248 silc_idlist_del_channel(server->local_list, entry);
3252 /* Notify other routers about the new channel. We send the packet
3253 to our primary route. */
3255 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3256 channel_name, entry->id,
3257 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3260 /* Distribute to backup routers */
3261 if (broadcast && server->server_type == SILC_ROUTER) {
3264 SilcUInt32 name_len = strlen(channel_name);
3265 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3266 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3268 packet = silc_channel_payload_encode(channel_name, name_len,
3269 cid, channel_id_len, entry->mode);
3270 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3271 packet->data, packet->len, FALSE, TRUE);
3273 silc_buffer_free(packet);
3276 server->stat.my_channels++;
3277 if (server->server_type == SILC_ROUTER) {
3278 server->stat.channels++;
3279 server->stat.cell_channels++;
3280 entry->users_resolved = TRUE;
3286 /* Channel's key re-key timeout callback. */
3288 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3290 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3291 SilcServer server = (SilcServer)rekey->context;
3295 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3298 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3301 /* Generates new channel key. This is used to create the initial channel key
3302 but also to re-generate new key for channel. If `key_len' is provided
3303 it is the bytes of the key length. */
3305 bool silc_server_create_channel_key(SilcServer server,
3306 SilcChannelEntry channel,
3310 unsigned char channel_key[32], hash[32];
3313 SILC_LOG_DEBUG(("Generating channel key"));
3315 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3316 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3320 if (!channel->channel_key)
3321 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3322 channel->channel_key = NULL;
3328 else if (channel->key_len)
3329 len = channel->key_len / 8;
3331 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3333 /* Create channel key */
3334 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3337 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3339 /* Remove old key if exists */
3341 memset(channel->key, 0, channel->key_len / 8);
3342 silc_free(channel->key);
3346 channel->key_len = len * 8;
3347 channel->key = silc_memdup(channel_key, len);
3348 memset(channel_key, 0, sizeof(channel_key));
3350 /* Generate HMAC key from the channel key data and set it */
3352 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3353 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3354 silc_hmac_set_key(channel->hmac, hash,
3355 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3356 memset(hash, 0, sizeof(hash));
3358 if (server->server_type == SILC_ROUTER) {
3359 if (!channel->rekey)
3360 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3361 channel->rekey->context = (void *)server;
3362 channel->rekey->channel = channel;
3363 channel->rekey->key_len = key_len;
3364 if (channel->rekey->task)
3365 silc_schedule_task_del(server->schedule, channel->rekey->task);
3367 channel->rekey->task =
3368 silc_schedule_task_add(server->schedule, 0,
3369 silc_server_channel_key_rekey,
3370 (void *)channel->rekey,
3371 server->config->channel_rekey_secs, 0,
3373 SILC_TASK_PRI_NORMAL);
3379 /* Saves the channel key found in the encoded `key_payload' buffer. This
3380 function is used when we receive Channel Key Payload and also when we're
3381 processing JOIN command reply. Returns entry to the channel. */
3383 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3384 SilcBuffer key_payload,
3385 SilcChannelEntry channel)
3387 SilcChannelKeyPayload payload = NULL;
3388 SilcChannelID *id = NULL;
3389 unsigned char *tmp, hash[32];
3393 SILC_LOG_DEBUG(("Start"));
3395 /* Decode channel key payload */
3396 payload = silc_channel_key_payload_parse(key_payload->data,
3399 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3404 /* Get the channel entry */
3407 /* Get channel ID */
3408 tmp = silc_channel_key_get_id(payload, &tmp_len);
3409 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3415 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3417 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3419 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3420 silc_id_render(id, SILC_ID_CHANNEL)));
3426 tmp = silc_channel_key_get_key(payload, &tmp_len);
3432 cipher = silc_channel_key_get_cipher(payload, NULL);
3438 /* Remove old key if exists */
3440 memset(channel->key, 0, channel->key_len / 8);
3441 silc_free(channel->key);
3442 silc_cipher_free(channel->channel_key);
3445 /* Create new cipher */
3446 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3447 channel->channel_key = NULL;
3452 if (channel->cipher)
3453 silc_free(channel->cipher);
3454 channel->cipher = strdup(cipher);
3457 channel->key_len = tmp_len * 8;
3458 channel->key = silc_memdup(tmp, tmp_len);
3459 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3461 /* Generate HMAC key from the channel key data and set it */
3463 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3464 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3465 silc_hmac_set_key(channel->hmac, hash,
3466 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3468 memset(hash, 0, sizeof(hash));
3469 memset(tmp, 0, tmp_len);
3471 if (server->server_type == SILC_ROUTER) {
3472 if (!channel->rekey)
3473 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3474 channel->rekey->context = (void *)server;
3475 channel->rekey->channel = channel;
3476 if (channel->rekey->task)
3477 silc_schedule_task_del(server->schedule, channel->rekey->task);
3479 channel->rekey->task =
3480 silc_schedule_task_add(server->schedule, 0,
3481 silc_server_channel_key_rekey,
3482 (void *)channel->rekey,
3483 server->config->channel_rekey_secs, 0,
3485 SILC_TASK_PRI_NORMAL);
3491 silc_channel_key_payload_free(payload);
3496 /* Heartbeat callback. This function is set as argument for the
3497 silc_socket_set_heartbeat function. The library will call this function
3498 at the set time interval. */
3500 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3503 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3505 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3507 /* Send the heartbeat */
3508 silc_server_send_heartbeat(hb->server, sock);
3511 /* Returns assembled of all servers in the given ID list. The packet's
3512 form is dictated by the New ID payload. */
3514 static void silc_server_announce_get_servers(SilcServer server,
3515 SilcServerEntry remote,
3517 SilcBuffer *servers,
3518 unsigned long creation_time)
3520 SilcIDCacheList list;
3521 SilcIDCacheEntry id_cache;
3522 SilcServerEntry entry;
3525 /* Go through all clients in the list */
3526 if (silc_idcache_get_all(id_list->servers, &list)) {
3527 if (silc_idcache_list_first(list, &id_cache)) {
3529 entry = (SilcServerEntry)id_cache->context;
3531 /* Do not announce the one we've sending our announcements and
3532 do not announce ourself. Also check the creation time if it's
3534 if ((entry == remote) || (entry == server->id_entry) ||
3535 (creation_time && entry->data.created < creation_time)) {
3536 if (!silc_idcache_list_next(list, &id_cache))
3541 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3543 *servers = silc_buffer_realloc(*servers,
3545 (*servers)->truelen + idp->len :
3547 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3548 silc_buffer_put(*servers, idp->data, idp->len);
3549 silc_buffer_pull(*servers, idp->len);
3550 silc_buffer_free(idp);
3552 if (!silc_idcache_list_next(list, &id_cache))
3557 silc_idcache_list_free(list);
3562 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3568 p = silc_notify_payload_encode(notify, argc, ap);
3574 /* This function is used by router to announce existing servers to our
3575 primary router when we've connected to it. If `creation_time' is non-zero
3576 then only the servers that has been created after the `creation_time'
3577 will be announced. */
3579 void silc_server_announce_servers(SilcServer server, bool global,
3580 unsigned long creation_time,
3581 SilcSocketConnection remote)
3583 SilcBuffer servers = NULL;
3585 SILC_LOG_DEBUG(("Announcing servers"));
3587 /* Get servers in local list */
3588 silc_server_announce_get_servers(server, remote->user_data,
3589 server->local_list, &servers,
3593 /* Get servers in global list */
3594 silc_server_announce_get_servers(server, remote->user_data,
3595 server->global_list, &servers,
3599 silc_buffer_push(servers, servers->data - servers->head);
3600 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3602 /* Send the packet */
3603 silc_server_packet_send(server, remote,
3604 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3605 servers->data, servers->len, TRUE);
3607 silc_buffer_free(servers);
3611 /* Returns assembled packet of all clients in the given ID list. The
3612 packet's form is dictated by the New ID Payload. */
3614 static void silc_server_announce_get_clients(SilcServer server,
3616 SilcBuffer *clients,
3618 unsigned long creation_time)
3620 SilcIDCacheList list;
3621 SilcIDCacheEntry id_cache;
3622 SilcClientEntry client;
3625 unsigned char mode[4];
3627 /* Go through all clients in the list */
3628 if (silc_idcache_get_all(id_list->clients, &list)) {
3629 if (silc_idcache_list_first(list, &id_cache)) {
3631 client = (SilcClientEntry)id_cache->context;
3633 if (creation_time && client->data.created < creation_time) {
3634 if (!silc_idcache_list_next(list, &id_cache))
3639 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3641 *clients = silc_buffer_realloc(*clients,
3643 (*clients)->truelen + idp->len :
3645 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3646 silc_buffer_put(*clients, idp->data, idp->len);
3647 silc_buffer_pull(*clients, idp->len);
3649 SILC_PUT32_MSB(client->mode, mode);
3650 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3651 2, idp->data, idp->len,
3653 *umodes = silc_buffer_realloc(*umodes,
3655 (*umodes)->truelen + tmp->len :
3657 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3658 silc_buffer_put(*umodes, tmp->data, tmp->len);
3659 silc_buffer_pull(*umodes, tmp->len);
3660 silc_buffer_free(tmp);
3662 silc_buffer_free(idp);
3664 if (!silc_idcache_list_next(list, &id_cache))
3669 silc_idcache_list_free(list);
3673 /* This function is used to announce our existing clients to our router
3674 when we've connected to it. If `creation_time' is non-zero then only
3675 the clients that has been created after the `creation_time' will be
3678 void silc_server_announce_clients(SilcServer server,
3679 unsigned long creation_time,
3680 SilcSocketConnection remote)
3682 SilcBuffer clients = NULL;
3683 SilcBuffer umodes = NULL;
3685 SILC_LOG_DEBUG(("Announcing clients"));
3687 /* Get clients in local list */
3688 silc_server_announce_get_clients(server, server->local_list,
3689 &clients, &umodes, creation_time);
3691 /* As router we announce our global list as well */
3692 if (server->server_type == SILC_ROUTER)
3693 silc_server_announce_get_clients(server, server->global_list,
3694 &clients, &umodes, creation_time);
3697 silc_buffer_push(clients, clients->data - clients->head);
3698 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3700 /* Send the packet */
3701 silc_server_packet_send(server, remote,
3702 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3703 clients->data, clients->len, TRUE);
3705 silc_buffer_free(clients);
3709 silc_buffer_push(umodes, umodes->data - umodes->head);
3710 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3712 /* Send the packet */
3713 silc_server_packet_send(server, remote,
3714 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3715 umodes->data, umodes->len, TRUE);
3717 silc_buffer_free(umodes);
3721 /* Returns channel's topic for announcing it */
3723 void silc_server_announce_get_channel_topic(SilcServer server,
3724 SilcChannelEntry channel,
3729 if (channel->topic) {
3730 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3731 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3732 chidp->data, chidp->len,
3734 strlen(channel->topic));
3735 silc_buffer_free(chidp);
3739 /* Returns assembled packets for channel users of the `channel'. */
3741 void silc_server_announce_get_channel_users(SilcServer server,
3742 SilcChannelEntry channel,
3743 SilcBuffer *channel_modes,
3744 SilcBuffer *channel_users,
3745 SilcBuffer *channel_users_modes)
3747 SilcChannelClientEntry chl;
3748 SilcHashTableList htl;
3749 SilcBuffer chidp, clidp, csidp;
3752 unsigned char mode[4], *fkey = NULL;
3753 SilcUInt32 fkey_len = 0;
3756 SILC_LOG_DEBUG(("Start"));
3758 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3759 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
3762 SILC_PUT32_MSB(channel->mode, mode);
3763 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
3764 if (channel->founder_key)
3765 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3767 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
3768 6, csidp->data, csidp->len,
3771 hmac, hmac ? strlen(hmac) : 0,
3772 channel->passphrase,
3773 channel->passphrase ?
3774 strlen(channel->passphrase) : 0,
3778 silc_buffer_realloc(*channel_modes,
3780 (*channel_modes)->truelen + len : len));
3781 silc_buffer_pull_tail(*channel_modes,
3782 ((*channel_modes)->end -
3783 (*channel_modes)->data));
3784 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
3785 silc_buffer_pull(*channel_modes, len);
3786 silc_buffer_free(tmp);
3791 /* Now find all users on the channel */
3792 silc_hash_table_list(channel->user_list, &htl);
3793 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3794 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3797 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3798 clidp->data, clidp->len,
3799 chidp->data, chidp->len);
3802 silc_buffer_realloc(*channel_users,
3804 (*channel_users)->truelen + len : len));
3805 silc_buffer_pull_tail(*channel_users,
3806 ((*channel_users)->end -
3807 (*channel_users)->data));
3809 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3810 silc_buffer_pull(*channel_users, len);
3811 silc_buffer_free(tmp);
3813 /* CUMODE notify for mode change on the channel */
3814 SILC_PUT32_MSB(chl->mode, mode);
3815 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
3816 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3817 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3818 4, csidp->data, csidp->len,
3820 clidp->data, clidp->len,
3823 *channel_users_modes =
3824 silc_buffer_realloc(*channel_users_modes,
3825 (*channel_users_modes ?
3826 (*channel_users_modes)->truelen + len : len));
3827 silc_buffer_pull_tail(*channel_users_modes,
3828 ((*channel_users_modes)->end -
3829 (*channel_users_modes)->data));
3831 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3832 silc_buffer_pull(*channel_users_modes, len);
3833 silc_buffer_free(tmp);
3837 silc_buffer_free(clidp);
3839 silc_hash_table_list_reset(&htl);
3840 silc_buffer_free(chidp);
3841 silc_buffer_free(csidp);
3844 /* Returns assembled packets for all channels and users on those channels
3845 from the given ID List. The packets are in the form dictated by the
3846 New Channel and New Channel User payloads. */
3848 void silc_server_announce_get_channels(SilcServer server,
3850 SilcBuffer *channels,
3851 SilcBuffer **channel_modes,
3852 SilcBuffer *channel_users,
3853 SilcBuffer **channel_users_modes,
3854 SilcUInt32 *channel_users_modes_c,
3855 SilcBuffer **channel_topics,
3856 SilcChannelID ***channel_ids,
3857 unsigned long creation_time)
3859 SilcIDCacheList list;
3860 SilcIDCacheEntry id_cache;
3861 SilcChannelEntry channel;
3864 SilcUInt16 name_len;
3866 int i = *channel_users_modes_c;
3869 SILC_LOG_DEBUG(("Start"));
3871 /* Go through all channels in the list */
3872 if (silc_idcache_get_all(id_list->channels, &list)) {
3873 if (silc_idcache_list_first(list, &id_cache)) {
3875 channel = (SilcChannelEntry)id_cache->context;
3877 if (creation_time && channel->created < creation_time)
3882 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3883 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3884 name_len = strlen(channel->channel_name);
3887 len = 4 + name_len + id_len + 4;
3889 silc_buffer_realloc(*channels,
3890 (*channels ? (*channels)->truelen +
3892 silc_buffer_pull_tail(*channels,
3893 ((*channels)->end - (*channels)->data));
3894 silc_buffer_format(*channels,
3895 SILC_STR_UI_SHORT(name_len),
3896 SILC_STR_UI_XNSTRING(channel->channel_name,
3898 SILC_STR_UI_SHORT(id_len),
3899 SILC_STR_UI_XNSTRING(cid, id_len),
3900 SILC_STR_UI_INT(channel->mode),
3902 silc_buffer_pull(*channels, len);
3905 /* Channel user modes */
3906 *channel_users_modes = silc_realloc(*channel_users_modes,
3907 sizeof(**channel_users_modes) *
3909 (*channel_users_modes)[i] = NULL;
3910 *channel_modes = silc_realloc(*channel_modes,
3911 sizeof(**channel_modes) * (i + 1));
3912 (*channel_modes)[i] = NULL;
3913 *channel_ids = silc_realloc(*channel_ids,
3914 sizeof(**channel_ids) * (i + 1));
3915 (*channel_ids)[i] = NULL;
3916 silc_server_announce_get_channel_users(server, channel,
3917 &(*channel_modes)[i],
3919 &(*channel_users_modes)[i]);
3920 (*channel_ids)[i] = channel->id;
3922 /* Channel's topic */
3923 *channel_topics = silc_realloc(*channel_topics,
3924 sizeof(**channel_topics) * (i + 1));
3925 (*channel_topics)[i] = NULL;
3926 silc_server_announce_get_channel_topic(server, channel,
3927 &(*channel_topics)[i]);
3930 if (!silc_idcache_list_next(list, &id_cache))
3934 *channel_users_modes_c += i;
3937 silc_idcache_list_free(list);
3941 /* This function is used to announce our existing channels to our router
3942 when we've connected to it. This also announces the users on the
3943 channels to the router. If the `creation_time' is non-zero only the
3944 channels that was created after the `creation_time' are announced.
3945 Note that the channel users are still announced even if the `creation_time'
3948 void silc_server_announce_channels(SilcServer server,
3949 unsigned long creation_time,
3950 SilcSocketConnection remote)
3952 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
3953 SilcBuffer *channel_users_modes = NULL;
3954 SilcBuffer *channel_topics = NULL;
3955 SilcUInt32 channel_users_modes_c = 0;
3956 SilcChannelID **channel_ids = NULL;
3958 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3960 /* Get channels and channel users in local list */
3961 silc_server_announce_get_channels(server, server->local_list,
3962 &channels, &channel_modes,
3964 &channel_users_modes,
3965 &channel_users_modes_c,
3967 &channel_ids, creation_time);
3969 /* Get channels and channel users in global list */
3970 if (server->server_type != SILC_SERVER)
3971 silc_server_announce_get_channels(server, server->global_list,
3972 &channels, &channel_modes,
3974 &channel_users_modes,
3975 &channel_users_modes_c,
3977 &channel_ids, creation_time);
3980 silc_buffer_push(channels, channels->data - channels->head);
3981 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3983 /* Send the packet */
3984 silc_server_packet_send(server, remote,
3985 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3986 channels->data, channels->len,
3989 silc_buffer_free(channels);
3992 if (channel_modes) {
3995 for (i = 0; i < channel_users_modes_c; i++) {
3996 if (!channel_modes[i])
3998 silc_buffer_push(channel_modes[i],
3999 channel_modes[i]->data -
4000 channel_modes[i]->head);
4001 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4002 channel_modes[i]->len);
4003 silc_server_packet_send_dest(server, remote,
4004 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4005 channel_ids[i], SILC_ID_CHANNEL,
4006 channel_modes[i]->data,
4007 channel_modes[i]->len,
4009 silc_buffer_free(channel_modes[i]);
4011 silc_free(channel_modes);
4014 if (channel_users) {
4015 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4016 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4017 channel_users->len);
4019 /* Send the packet */
4020 silc_server_packet_send(server, remote,
4021 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4022 channel_users->data, channel_users->len,
4025 silc_buffer_free(channel_users);
4028 if (channel_users_modes) {
4031 for (i = 0; i < channel_users_modes_c; i++) {
4032 if (!channel_users_modes[i])
4034 silc_buffer_push(channel_users_modes[i],
4035 channel_users_modes[i]->data -
4036 channel_users_modes[i]->head);
4037 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4038 channel_users_modes[i]->len);
4039 silc_server_packet_send_dest(server, remote,
4040 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4041 channel_ids[i], SILC_ID_CHANNEL,
4042 channel_users_modes[i]->data,
4043 channel_users_modes[i]->len,
4045 silc_buffer_free(channel_users_modes[i]);
4047 silc_free(channel_users_modes);
4050 if (channel_topics) {
4053 for (i = 0; i < channel_users_modes_c; i++) {
4054 if (!channel_topics[i])
4057 silc_buffer_push(channel_topics[i],
4058 channel_topics[i]->data -
4059 channel_topics[i]->head);
4060 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4061 channel_topics[i]->len);
4062 silc_server_packet_send_dest(server, remote,
4063 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4064 channel_ids[i], SILC_ID_CHANNEL,
4065 channel_topics[i]->data,
4066 channel_topics[i]->len,
4068 silc_buffer_free(channel_topics[i]);
4070 silc_free(channel_topics);
4073 silc_free(channel_ids);
4076 /* Failure timeout callback. If this is called then we will immediately
4077 process the received failure. We always process the failure with timeout
4078 since we do not want to blindly trust to received failure packets.
4079 This won't be called (the timeout is cancelled) if the failure was
4080 bogus (it is bogus if remote does not close the connection after sending
4083 SILC_TASK_CALLBACK(silc_server_failure_callback)
4085 SilcServerFailureContext f = (SilcServerFailureContext)context;
4087 if (f->sock->protocol) {
4088 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4089 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4095 /* Assembles user list and users mode list from the `channel'. */
4097 bool silc_server_get_users_on_channel(SilcServer server,
4098 SilcChannelEntry channel,
4099 SilcBuffer *user_list,
4100 SilcBuffer *mode_list,
4101 SilcUInt32 *user_count)
4103 SilcChannelClientEntry chl;
4104 SilcHashTableList htl;
4105 SilcBuffer client_id_list;
4106 SilcBuffer client_mode_list;
4108 SilcUInt32 list_count = 0, len = 0;
4110 if (!silc_hash_table_count(channel->user_list))
4113 silc_hash_table_list(channel->user_list, &htl);
4114 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4115 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4116 silc_hash_table_list_reset(&htl);
4118 client_id_list = silc_buffer_alloc(len);
4120 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4121 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4122 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4124 silc_hash_table_list(channel->user_list, &htl);
4125 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4127 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4128 silc_buffer_put(client_id_list, idp->data, idp->len);
4129 silc_buffer_pull(client_id_list, idp->len);
4130 silc_buffer_free(idp);
4132 /* Client's mode on channel */
4133 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4134 silc_buffer_pull(client_mode_list, 4);
4138 silc_hash_table_list_reset(&htl);
4139 silc_buffer_push(client_id_list,
4140 client_id_list->data - client_id_list->head);
4141 silc_buffer_push(client_mode_list,
4142 client_mode_list->data - client_mode_list->head);
4144 *user_list = client_id_list;
4145 *mode_list = client_mode_list;
4146 *user_count = list_count;
4150 /* Saves users and their modes to the `channel'. */
4152 void silc_server_save_users_on_channel(SilcServer server,
4153 SilcSocketConnection sock,
4154 SilcChannelEntry channel,
4155 SilcClientID *noadd,
4156 SilcBuffer user_list,
4157 SilcBuffer mode_list,
4158 SilcUInt32 user_count)
4163 SilcClientID *client_id;
4164 SilcClientEntry client;
4165 SilcIDCacheEntry cache;
4166 SilcChannelClientEntry chl;
4169 SILC_LOG_DEBUG(("Start"));
4171 for (i = 0; i < user_count; i++) {
4173 SILC_GET16_MSB(idp_len, user_list->data + 2);
4175 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4176 silc_buffer_pull(user_list, idp_len);
4181 SILC_GET32_MSB(mode, mode_list->data);
4182 silc_buffer_pull(mode_list, 4);
4184 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4185 silc_free(client_id);
4191 /* Check if we have this client cached already. */
4192 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4193 server->server_type, &cache);
4195 client = silc_idlist_find_client_by_id(server->global_list,
4196 client_id, server->server_type,
4201 /* If router did not find such Client ID in its lists then this must
4202 be bogus client or some router in the net is buggy. */
4203 if (server->server_type == SILC_ROUTER) {
4204 silc_free(client_id);
4208 /* We don't have that client anywhere, add it. The client is added
4209 to global list since server didn't have it in the lists so it must be
4211 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4212 silc_id_dup(client_id, SILC_ID_CLIENT),
4213 sock->user_data, NULL, 0);
4215 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4216 silc_free(client_id);
4220 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4222 /* Found, if it is from global list we'll assure that we won't
4223 expire it now that the entry is on channel. */
4228 silc_free(client_id);
4230 if (!silc_server_client_on_channel(client, channel, &chl)) {
4231 /* Client was not on the channel, add it. */
4232 chl = silc_calloc(1, sizeof(*chl));
4233 chl->client = client;
4235 chl->channel = channel;
4236 silc_hash_table_add(channel->user_list, chl->client, chl);
4237 silc_hash_table_add(client->channels, chl->channel, chl);
4238 channel->user_count++;
4246 /* Saves channels and channels user modes to the `client'. Removes
4247 the client from those channels that are not sent in the list but
4250 void silc_server_save_user_channels(SilcServer server,
4251 SilcSocketConnection sock,
4252 SilcClientEntry client,
4253 SilcBuffer channels,
4254 SilcBuffer channels_user_modes)
4257 SilcUInt32 *chumodes;
4258 SilcChannelPayload entry;
4259 SilcChannelEntry channel;
4260 SilcChannelID *channel_id;
4261 SilcChannelClientEntry chl;
4262 SilcHashTable ht = NULL;
4263 SilcHashTableList htl;
4267 if (!channels ||!channels_user_modes)
4270 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4271 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4273 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4274 NULL, NULL, NULL, TRUE);
4275 silc_dlist_start(ch);
4276 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4277 /* Check if we have this channel, and add it if we don't have it.
4278 Also add the client on the channel unless it is there already. */
4279 channel_id = silc_channel_get_id_parse(entry);
4280 channel = silc_idlist_find_channel_by_id(server->local_list,
4283 channel = silc_idlist_find_channel_by_id(server->global_list,
4286 if (server->server_type != SILC_SERVER) {
4287 silc_free(channel_id);
4292 /* We don't have that channel anywhere, add it. */
4293 name = silc_channel_get_name(entry, NULL);
4294 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4295 channel_id, server->router,
4298 silc_free(channel_id);
4305 channel->mode = silc_channel_get_mode(entry);
4307 /* Add the client on the channel */
4308 if (!silc_server_client_on_channel(client, channel, &chl)) {
4309 chl = silc_calloc(1, sizeof(*chl));
4310 chl->client = client;
4311 chl->mode = chumodes[i++];
4312 chl->channel = channel;
4313 silc_hash_table_add(channel->user_list, chl->client, chl);
4314 silc_hash_table_add(client->channels, chl->channel, chl);
4315 channel->user_count++;
4318 chl->mode = chumodes[i++];
4321 silc_hash_table_add(ht, channel, channel);
4322 silc_free(channel_id);
4324 silc_channel_payload_list_free(ch);
4325 silc_free(chumodes);
4329 /* Go through the list again and remove client from channels that
4330 are no part of the list. */
4332 silc_hash_table_list(client->channels, &htl);
4333 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4334 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4335 silc_hash_table_del(chl->channel->user_list, chl->client);
4336 silc_hash_table_del(chl->client->channels, chl->channel);
4340 silc_hash_table_list_reset(&htl);
4341 silc_hash_table_free(ht);
4343 silc_hash_table_list(client->channels, &htl);
4344 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4345 silc_hash_table_del(chl->channel->user_list, chl->client);
4346 silc_hash_table_del(chl->client->channels, chl->channel);
4349 silc_hash_table_list_reset(&htl);
4353 /* Lookups route to the client indicated by the `id_data'. The connection
4354 object and internal data object is returned. Returns NULL if route
4355 could not be found to the client. If the `client_id' is specified then
4356 it is used and the `id_data' is ignored. */
4358 SilcSocketConnection
4359 silc_server_get_client_route(SilcServer server,
4360 unsigned char *id_data,
4362 SilcClientID *client_id,
4363 SilcIDListData *idata,
4364 SilcClientEntry *client_entry)
4367 SilcClientEntry client;
4369 SILC_LOG_DEBUG(("Start"));
4372 *client_entry = NULL;
4374 /* Decode destination Client ID */
4376 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4378 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4382 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4385 /* If the destination belongs to our server we don't have to route
4386 the packet anywhere but to send it to the local destination. */
4387 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4391 /* If we are router and the client has router then the client is in
4392 our cell but not directly connected to us. */
4393 if (server->server_type == SILC_ROUTER && client->router) {
4394 /* We are of course in this case the client's router thus the route
4395 to the client is the server who owns the client. So, we will send
4396 the packet to that server. */
4398 *idata = (SilcIDListData)client->router;
4399 return client->router->connection;
4402 /* Seems that client really is directly connected to us */
4404 *idata = (SilcIDListData)client;
4406 *client_entry = client;
4407 return client->connection;
4410 /* Destination belongs to someone not in this server. If we are normal
4411 server our action is to send the packet to our router. */
4412 if (server->server_type != SILC_ROUTER && !server->standalone) {
4415 *idata = (SilcIDListData)server->router;
4416 return SILC_PRIMARY_ROUTE(server);
4419 /* We are router and we will perform route lookup for the destination
4420 and send the packet to fastest route. */
4421 if (server->server_type == SILC_ROUTER && !server->standalone) {
4422 /* Check first that the ID is valid */
4423 client = silc_idlist_find_client_by_id(server->global_list, id,
4426 SilcSocketConnection dst_sock;
4428 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4432 *idata = (SilcIDListData)dst_sock->user_data;
4441 /* Encodes and returns channel list of channels the `client' has joined.
4442 Secret channels are not put to the list. */
4444 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4445 SilcClientEntry client,
4448 SilcBuffer *user_mode_list)
4450 SilcBuffer buffer = NULL;
4451 SilcChannelEntry channel;
4452 SilcChannelClientEntry chl;
4453 SilcHashTableList htl;
4456 SilcUInt16 name_len;
4460 *user_mode_list = NULL;
4462 silc_hash_table_list(client->channels, &htl);
4463 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4464 channel = chl->channel;
4466 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4468 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4471 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4472 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4473 name_len = strlen(channel->channel_name);
4475 len = 4 + name_len + id_len + 4;
4476 buffer = silc_buffer_realloc(buffer,
4477 (buffer ? buffer->truelen + len : len));
4478 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4479 silc_buffer_format(buffer,
4480 SILC_STR_UI_SHORT(name_len),
4481 SILC_STR_UI_XNSTRING(channel->channel_name,
4483 SILC_STR_UI_SHORT(id_len),
4484 SILC_STR_UI_XNSTRING(cid, id_len),
4485 SILC_STR_UI_INT(chl->channel->mode),
4487 silc_buffer_pull(buffer, len);
4490 if (user_mode_list) {
4491 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4493 (*user_mode_list)->truelen + 4 :
4495 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4496 (*user_mode_list)->data));
4497 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4498 silc_buffer_pull(*user_mode_list, 4);
4501 silc_hash_table_list_reset(&htl);
4504 silc_buffer_push(buffer, buffer->data - buffer->head);
4505 if (user_mode_list && *user_mode_list)
4506 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4507 (*user_mode_list)->head));
4512 /* Finds client entry by Client ID and if it is not found then resolves
4513 it using WHOIS command. */
4515 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4516 SilcClientID *client_id,
4517 bool always_resolve,
4520 SilcClientEntry client;
4525 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4528 client = silc_idlist_find_client_by_id(server->global_list,
4529 client_id, TRUE, NULL);
4530 if (!client && server->server_type == SILC_ROUTER)
4534 if (!client && server->standalone)
4537 if (!client || !client->nickname || !client->username ||
4539 SilcBuffer buffer, idp;
4542 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4543 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4544 client->resolve_cmd_ident = ++server->cmd_ident;
4547 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4548 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4549 server->cmd_ident, 1,
4550 4, idp->data, idp->len);
4551 silc_server_packet_send(server, client ? client->router->connection :
4552 SILC_PRIMARY_ROUTE(server),
4553 SILC_PACKET_COMMAND, 0,
4554 buffer->data, buffer->len, FALSE);
4555 silc_buffer_free(idp);
4556 silc_buffer_free(buffer);
4567 /* A timeout callback for the re-key. We will be the initiator of the
4570 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4572 SilcSocketConnection sock = (SilcSocketConnection)context;
4573 SilcIDListData idata = (SilcIDListData)sock->user_data;
4574 SilcServer server = (SilcServer)idata->rekey->context;
4575 SilcProtocol protocol;
4576 SilcServerRekeyInternalContext *proto_ctx;
4578 SILC_LOG_DEBUG(("Start"));
4580 /* Allocate internal protocol context. This is sent as context
4582 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4583 proto_ctx->server = (void *)server;
4584 proto_ctx->sock = sock;
4585 proto_ctx->responder = FALSE;
4586 proto_ctx->pfs = idata->rekey->pfs;
4588 /* Perform rekey protocol. Will call the final callback after the
4589 protocol is over. */
4590 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4591 &protocol, proto_ctx, silc_server_rekey_final);
4592 sock->protocol = protocol;
4594 /* Run the protocol */
4595 silc_protocol_execute(protocol, server->schedule, 0, 0);
4597 /* Re-register re-key timeout */
4598 silc_schedule_task_add(server->schedule, sock->sock,
4599 silc_server_rekey_callback,
4600 context, idata->rekey->timeout, 0,
4601 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4604 /* The final callback for the REKEY protocol. This will actually take the
4605 new key material into use. */
4607 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4609 SilcProtocol protocol = (SilcProtocol)context;
4610 SilcServerRekeyInternalContext *ctx =
4611 (SilcServerRekeyInternalContext *)protocol->context;
4612 SilcServer server = (SilcServer)ctx->server;
4613 SilcSocketConnection sock = ctx->sock;
4615 SILC_LOG_DEBUG(("Start"));
4617 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4618 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4619 /* Error occured during protocol */
4620 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4621 silc_protocol_cancel(protocol, server->schedule);
4622 silc_protocol_free(protocol);
4623 sock->protocol = NULL;
4625 silc_packet_context_free(ctx->packet);
4627 silc_ske_free(ctx->ske);
4632 /* Purge the outgoing data queue to assure that all rekey packets really
4633 go to the network before we quit the protocol. */
4634 silc_server_packet_queue_purge(server, sock);
4637 silc_protocol_free(protocol);
4638 sock->protocol = NULL;
4640 silc_packet_context_free(ctx->packet);
4642 silc_ske_free(ctx->ske);
4646 /* Task callback used to retrieve network statistical information from
4647 router server once in a while. */
4649 SILC_TASK_CALLBACK(silc_server_get_stats)
4651 SilcServer server = (SilcServer)context;
4652 SilcBuffer idp, packet;
4654 SILC_LOG_DEBUG(("Retrieving stats from router"));
4656 if (!server->standalone) {
4657 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4658 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4659 ++server->cmd_ident, 1,
4660 1, idp->data, idp->len);
4661 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4662 SILC_PACKET_COMMAND, 0, packet->data,
4663 packet->len, FALSE);
4664 silc_buffer_free(packet);
4665 silc_buffer_free(idp);
4668 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4669 server, 120, 0, SILC_TASK_TIMEOUT,