5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
47 SILC_TASK_CALLBACK(silc_server_get_stats);
49 /* Allocates a new SILC server object. This has to be done before the server
50 can be used. After allocation one must call silc_server_init to initialize
51 the server. The new allocated server object is returned to the new_server
54 int silc_server_alloc(SilcServer *new_server)
58 SILC_LOG_DEBUG(("Allocating new server object"));
60 server = silc_calloc(1, sizeof(*server));
61 server->server_type = SILC_SERVER;
62 server->standalone = TRUE;
63 server->local_list = silc_calloc(1, sizeof(*server->local_list));
64 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 server->pending_commands = silc_dlist_init();
67 server->sim = silc_dlist_init();
75 /* Free's the SILC server object. This is called at the very end before
78 void silc_server_free(SilcServer server)
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
91 silc_dlist_uninit(server->sim);
95 silc_server_config_unref(&server->config_ref);
97 silc_rng_free(server->rng);
99 silc_pkcs_free(server->pkcs);
100 if (server->public_key)
101 silc_pkcs_public_key_free(server->public_key);
102 if (server->private_key)
103 silc_pkcs_private_key_free(server->private_key);
104 if (server->pending_commands)
105 silc_dlist_uninit(server->pending_commands);
106 if (server->id_entry)
107 silc_idlist_del_server(server->local_list, server->id_entry);
109 silc_idcache_free(server->local_list->clients);
110 silc_idcache_free(server->local_list->servers);
111 silc_idcache_free(server->local_list->channels);
112 silc_idcache_free(server->global_list->clients);
113 silc_idcache_free(server->global_list->servers);
114 silc_idcache_free(server->global_list->channels);
115 silc_hash_table_free(server->watcher_list);
117 silc_hash_free(server->md5hash);
118 silc_hash_free(server->sha1hash);
119 silc_hmac_unregister_all();
120 silc_hash_unregister_all();
121 silc_cipher_unregister_all();
122 silc_pkcs_unregister_all();
124 silc_free(server->local_list);
125 silc_free(server->global_list);
126 silc_free(server->server_name);
127 silc_free(server->id_string);
128 silc_free(server->purge_i);
129 silc_free(server->purge_g);
133 /* Creates a new server listener. */
135 static bool silc_server_listen(SilcServer server, const char *server_ip,
136 SilcUInt16 port, int *sock)
138 *sock = silc_net_create_server(port, server_ip);
140 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
147 /* Adds a secondary listener. */
149 bool silc_server_init_secondary(SilcServer server)
151 int sock = 0, sock_list[server->config->param.connections_max];
152 SilcSocketConnection newsocket = NULL;
153 SilcServerConfigServerInfoInterface *interface;
155 for (interface = server->config->server_info->secondary; interface;
156 interface = interface->next, sock++) {
158 if (!silc_server_listen(server,
159 interface->server_ip, interface->port, &sock_list[sock]))
162 /* Set socket to non-blocking mode */
163 silc_net_set_socket_nonblock(sock_list[sock]);
165 /* Add ourselves also to the socket table. The entry allocated above
166 is sent as argument for fast referencing in the future. */
167 silc_socket_alloc(sock_list[sock],
168 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
169 server->sockets[sock_list[sock]] = newsocket;
170 SILC_SET_LISTENER(newsocket);
172 /* Perform name and address lookups to resolve the listenning address
174 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
176 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
178 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
179 newsocket->hostname ? newsocket->hostname :
180 newsocket->ip ? newsocket->ip : ""));
181 server->stat.conn_failures++;
184 if (!newsocket->hostname)
185 newsocket->hostname = strdup(newsocket->ip);
187 newsocket->port = silc_net_get_local_port(sock);
189 newsocket->user_data = (void *)server->id_entry;
190 silc_schedule_task_add(server->schedule, sock_list[sock],
191 silc_server_accept_new_connection,
192 (void *)server, 0, 0,
194 SILC_TASK_PRI_NORMAL);
200 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
204 /* Initializes the entire SILC server. This is called always before running
205 the server. This is called only once at the initialization of the program.
206 This binds the server to its listenning port. After this function returns
207 one should call silc_server_run to start the server. This returns TRUE
208 when everything is ok to run the server. Configuration file must be
209 read and parsed before calling this. */
211 bool silc_server_init(SilcServer server)
215 SilcServerEntry id_entry;
216 SilcIDListPurge purge;
217 SilcSocketConnection newsocket = NULL;
219 SILC_LOG_DEBUG(("Initializing server"));
221 server->starttime = time(NULL);
223 /* Take config object for us */
224 silc_server_config_ref(&server->config_ref, server->config,
227 /* Steal public and private key from the config object */
228 server->public_key = server->config->server_info->public_key;
229 server->private_key = server->config->server_info->private_key;
230 server->config->server_info->public_key = NULL;
231 server->config->server_info->private_key = NULL;
233 /* Register all configured ciphers, PKCS and hash functions. */
234 if (!silc_server_config_register_ciphers(server))
235 silc_cipher_register_default();
236 if (!silc_server_config_register_pkcs(server))
237 silc_pkcs_register_default();
238 if (!silc_server_config_register_hashfuncs(server))
239 silc_hash_register_default();
240 if (!silc_server_config_register_hmacs(server))
241 silc_hmac_register_default();
243 /* Initialize random number generator for the server. */
244 server->rng = silc_rng_alloc();
245 silc_rng_init(server->rng);
246 silc_rng_global_init(server->rng);
248 /* Initialize hash functions for server to use */
249 silc_hash_alloc("md5", &server->md5hash);
250 silc_hash_alloc("sha1", &server->sha1hash);
252 /* Allocate PKCS context for local public and private keys */
253 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
255 silc_pkcs_public_key_set(server->pkcs, server->public_key);
256 silc_pkcs_private_key_set(server->pkcs, server->private_key);
258 /* Initialize the scheduler */
259 server->schedule = silc_schedule_init(server->config->param.connections_max);
260 if (!server->schedule)
263 /* First, register log files configuration for error output */
264 silc_server_config_setlogfiles(server);
266 /* Initialize ID caches */
267 server->local_list->clients =
268 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
269 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
270 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
272 /* These are allocated for normal server as well as these hold some
273 global information that the server has fetched from its router. For
274 router these are used as they are supposed to be used on router. */
275 server->global_list->clients =
276 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
277 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
278 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
280 /* Init watcher list */
281 server->watcher_list =
282 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
283 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
285 if (!server->watcher_list)
288 /* Create a listening server */
289 if (!silc_server_listen(server,
290 server->config->server_info->primary == NULL ? NULL :
291 server->config->server_info->primary->server_ip,
292 server->config->server_info->primary == NULL ? 0 :
293 server->config->server_info->primary->port,
297 /* Set socket to non-blocking mode */
298 silc_net_set_socket_nonblock(sock);
301 /* Allocate the entire socket list that is used in server. Eventually
302 all connections will have entry in this table (it is a table of
303 pointers to the actual object that is allocated individually
305 server->sockets = silc_calloc(server->config->param.connections_max,
306 sizeof(*server->sockets));
307 if (!server->sockets)
310 /* Add ourselves also to the socket table. The entry allocated above
311 is sent as argument for fast referencing in the future. */
312 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
313 server->sockets[sock] = newsocket;
314 SILC_SET_LISTENER(newsocket);
316 /* Perform name and address lookups to resolve the listenning address
318 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
320 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
322 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
323 newsocket->hostname ? newsocket->hostname :
324 newsocket->ip ? newsocket->ip : ""));
325 server->stat.conn_failures++;
328 if (!newsocket->hostname)
329 newsocket->hostname = strdup(newsocket->ip);
331 newsocket->port = silc_net_get_local_port(sock);
333 /* Create a Server ID for the server. */
334 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
339 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
340 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
341 server->server_name = server->config->server_info->server_name;
342 server->config->server_info->server_name = NULL;
344 /* Add ourselves to the server list. We don't have a router yet
345 beacuse we haven't established a route yet. It will be done later.
346 For now, NULL is sent as router. This allocates new entry to
349 silc_idlist_add_server(server->local_list, strdup(server->server_name),
350 server->server_type, server->id, NULL, NULL);
352 SILC_LOG_ERROR(("Could not add ourselves to cache"));
355 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
357 /* Put the allocated socket pointer also to the entry allocated above
358 for fast back-referencing to the socket list. */
359 newsocket->user_data = (void *)id_entry;
360 id_entry->connection = (void *)newsocket;
361 server->id_entry = id_entry;
363 /* Register protocols */
364 silc_server_protocols_register();
366 /* Add the first task to the scheduler. This is task that is executed by
367 timeout. It expires as soon as the caller calls silc_server_run. This
368 task performs authentication protocol and key exchange with our
370 silc_schedule_task_add(server->schedule, 0,
371 silc_server_connect_to_router,
372 (void *)server, 0, 1,
374 SILC_TASK_PRI_NORMAL);
376 /* Add listener task to the scheduler. This task receives new connections
377 to the server. This task remains on the queue until the end of the
379 silc_schedule_task_add(server->schedule, sock,
380 silc_server_accept_new_connection,
381 (void *)server, 0, 0,
383 SILC_TASK_PRI_NORMAL);
385 if (silc_server_init_secondary(server) == FALSE)
388 server->listenning = TRUE;
390 /* If server connections has been configured then we must be router as
391 normal server cannot have server connections, only router connections. */
392 if (server->config->servers) {
393 SilcServerConfigServer *ptr = server->config->servers;
395 server->server_type = SILC_ROUTER;
397 if (ptr->backup_router) {
398 server->server_type = SILC_BACKUP_ROUTER;
399 server->backup_router = TRUE;
400 server->id_entry->server_type = SILC_BACKUP_ROUTER;
407 /* Register the ID Cache purge task. This periodically purges the ID cache
408 and removes the expired cache entries. */
410 /* Clients local list */
411 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
412 purge->cache = server->local_list->clients;
413 purge->schedule = server->schedule;
414 purge->timeout = 600;
415 silc_schedule_task_add(purge->schedule, 0,
417 (void *)purge, purge->timeout, 0,
418 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
420 /* Clients global list */
421 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
422 purge->cache = server->global_list->clients;
423 purge->schedule = server->schedule;
424 purge->timeout = 300;
425 silc_schedule_task_add(purge->schedule, 0,
427 (void *)purge, purge->timeout, 0,
428 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
430 /* If we are normal server we'll retrieve network statisticial information
431 once in a while from the router. */
432 if (server->server_type == SILC_SERVER)
433 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
434 server, 10, 0, SILC_TASK_TIMEOUT,
437 if (server->server_type == SILC_ROUTER)
438 server->stat.routers++;
440 SILC_LOG_DEBUG(("Server initialized"));
442 /* We are done here, return succesfully */
446 silc_server_config_unref(&server->config_ref);
447 silc_net_close_server(sock);
451 /* This function basically reads the config file again and switches the config
452 object pointed by the server object. After that, we have to fix various
453 things such as the server_name and the listening ports.
454 Keep in mind that we no longer have the root privileges at this point. */
456 bool silc_server_rehash(SilcServer server)
458 SilcServerConfig newconfig;
460 SILC_LOG_INFO(("Rehashing server"));
462 /* Reset the logging system */
463 silc_log_quick = TRUE;
464 silc_log_flush_all();
466 /* Start the main rehash phase (read again the config file) */
467 newconfig = silc_server_config_alloc(server->config_file);
469 SILC_LOG_ERROR(("Rehash FAILED."));
473 /* Reinit scheduler if necessary */
474 if (newconfig->param.connections_max > server->config->param.connections_max)
475 if (!silc_schedule_reinit(server->schedule,
476 newconfig->param.connections_max))
479 /* Fix the server_name field */
480 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
481 silc_free(server->server_name);
482 server->server_name = newconfig->server_info->server_name;
483 newconfig->server_info->server_name = NULL;
485 /* Update the idcache list with a fresh pointer */
486 silc_free(server->id_entry->server_name);
487 server->id_entry->server_name = strdup(server->server_name);
488 if (!silc_idcache_del_by_context(server->local_list->servers,
491 if (!silc_idcache_add(server->local_list->servers,
492 server->id_entry->server_name,
493 server->id_entry->id, server->id_entry, 0, NULL))
498 silc_server_config_setlogfiles(server);
500 /* Change new key pair if necessary */
501 if (newconfig->server_info->public_key &&
502 !silc_pkcs_public_key_compare(server->public_key,
503 newconfig->server_info->public_key)) {
504 silc_pkcs_public_key_free(server->public_key);
505 silc_pkcs_private_key_free(server->private_key);
506 server->public_key = newconfig->server_info->public_key;
507 server->private_key = newconfig->server_info->private_key;
508 newconfig->server_info->public_key = NULL;
509 newconfig->server_info->private_key = NULL;
511 /* Allocate PKCS context for local public and private keys */
512 silc_pkcs_free(server->pkcs);
513 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
515 silc_pkcs_public_key_set(server->pkcs, server->public_key);
516 silc_pkcs_private_key_set(server->pkcs, server->private_key);
519 /* Go through all configured routers after rehash */
520 silc_schedule_task_add(server->schedule, 0,
521 silc_server_connect_to_router,
522 (void *)server, 0, 1,
524 SILC_TASK_PRI_NORMAL);
526 /* Check whether our router status has changed */
527 if (newconfig->servers) {
528 SilcServerConfigServer *ptr = newconfig->servers;
530 server->server_type = SILC_ROUTER;
532 if (ptr->backup_router) {
533 server->server_type = SILC_BACKUP_ROUTER;
534 server->backup_router = TRUE;
535 server->id_entry->server_type = SILC_BACKUP_ROUTER;
542 /* Our old config is gone now. We'll unreference our reference made in
543 silc_server_init and then destroy it since we are destroying it
544 underneath the application (layer which called silc_server_init). */
545 silc_server_config_unref(&server->config_ref);
546 silc_server_config_destroy(server->config);
548 /* Take new config context */
549 server->config = newconfig;
550 silc_server_config_ref(&server->config_ref, server->config, server->config);
552 SILC_LOG_DEBUG(("Server rehashed"));
557 /* The heart of the server. This runs the scheduler thus runs the server.
558 When this returns the server has been stopped and the program will
561 void silc_server_run(SilcServer server)
563 SILC_LOG_INFO(("SILC Server started"));
565 /* Start the scheduler, the heart of the SILC server. When this returns
566 the program will be terminated. */
567 silc_schedule(server->schedule);
570 /* Stops the SILC server. This function is used to shutdown the server.
571 This is usually called after the scheduler has returned. After stopping
572 the server one should call silc_server_free. */
574 void silc_server_stop(SilcServer server)
576 SILC_LOG_DEBUG(("Stopping server"));
578 if (server->schedule) {
581 /* Close all connections */
582 for (i = 0; i < server->config->param.connections_max; i++) {
583 if (!server->sockets[i])
585 if (!SILC_IS_LISTENER(server->sockets[i])) {
586 silc_schedule_task_del_by_context(server->schedule,
588 silc_server_disconnect_remote(server, server->sockets[i],
590 "Server is shutting down");
592 silc_socket_free(server->sockets[i]);
593 server->sockets[i] = NULL;
597 /* We are not connected to network anymore */
598 server->standalone = TRUE;
600 silc_schedule_stop(server->schedule);
601 silc_schedule_uninit(server->schedule);
602 server->schedule = NULL;
604 silc_free(server->sockets);
605 server->sockets = NULL;
608 silc_server_protocols_unregister();
610 SILC_LOG_DEBUG(("Server stopped"));
613 /* Function that is called when the network connection to a router has
614 been established. This will continue with the key exchange protocol
615 with the remote router. */
617 void silc_server_start_key_exchange(SilcServer server,
618 SilcServerConnection sconn,
621 SilcSocketConnection newsocket;
622 SilcProtocol protocol;
623 SilcServerKEInternalContext *proto_ctx;
624 SilcServerConfigRouter *conn =
625 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
628 /* Cancel any possible retry timeouts */
629 silc_schedule_task_del_by_callback(server->schedule,
630 silc_server_connect_to_router_retry);
632 /* Set socket options */
633 silc_net_set_socket_nonblock(sock);
634 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
636 /* Create socket connection for the connection. Even though we
637 know that we are connecting to a router we will mark the socket
638 to be unknown connection until we have executed authentication
640 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
641 server->sockets[sock] = newsocket;
642 newsocket->hostname = strdup(sconn->remote_host);
643 newsocket->ip = strdup(sconn->remote_host);
644 newsocket->port = sconn->remote_port;
645 sconn->sock = newsocket;
647 /* Allocate internal protocol context. This is sent as context
649 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
650 proto_ctx->server = (void *)server;
651 proto_ctx->context = (void *)sconn;
652 proto_ctx->sock = newsocket;
653 proto_ctx->rng = server->rng;
654 proto_ctx->responder = FALSE;
656 /* Set Key Exchange flags from configuration, but fall back to global
658 SILC_GET_SKE_FLAGS(conn, proto_ctx);
659 if (server->config->param.key_exchange_pfs)
660 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
662 /* Perform key exchange protocol. silc_server_connect_to_router_second
663 will be called after the protocol is finished. */
664 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
665 &protocol, proto_ctx,
666 silc_server_connect_to_router_second);
667 newsocket->protocol = protocol;
669 /* Register a timeout task that will be executed if the protocol
670 is not executed within set limit. */
671 proto_ctx->timeout_task =
672 silc_schedule_task_add(server->schedule, sock,
673 silc_server_timeout_remote,
674 server, server->config->key_exchange_timeout, 0,
678 /* Register the connection for network input and output. This sets
679 that scheduler will listen for incoming packets for this connection
680 and sets that outgoing packets may be sent to this connection as
681 well. However, this doesn't set the scheduler for outgoing traffic,
682 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
683 later when outgoing data is available. */
684 context = (void *)server;
685 SILC_REGISTER_CONNECTION_FOR_IO(sock);
687 /* Run the protocol */
688 silc_protocol_execute(protocol, server->schedule, 0, 0);
691 /* Timeout callback that will be called to retry connecting to remote
692 router. This is used by both normal and router server. This will wait
693 before retrying the connecting. The timeout is generated by exponential
694 backoff algorithm. */
696 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
698 SilcServerConnection sconn = (SilcServerConnection)context;
699 SilcServer server = sconn->server;
700 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
701 SilcServerConfigConnParams *param =
702 (conn->param ? conn->param : &server->config->param);
704 SILC_LOG_INFO(("Retrying connecting to a router"));
706 /* Calculate next timeout */
707 if (sconn->retry_count >= 1) {
708 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
709 if (sconn->retry_timeout > param->reconnect_interval_max)
710 sconn->retry_timeout = param->reconnect_interval_max;
712 sconn->retry_timeout = param->reconnect_interval;
714 sconn->retry_count++;
715 sconn->retry_timeout = sconn->retry_timeout +
716 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
718 /* If we've reached max retry count, give up. */
719 if ((sconn->retry_count > param->reconnect_count) &&
720 !param->reconnect_keep_trying) {
721 SILC_LOG_ERROR(("Could not connect to router, giving up"));
722 silc_server_config_unref(&sconn->conn);
723 silc_free(sconn->remote_host);
724 silc_free(sconn->backup_replace_ip);
729 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
730 sconn->retry_timeout));
732 /* We will lookup a fresh pointer later */
733 silc_server_config_unref(&sconn->conn);
735 /* Wait one before retrying */
736 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
737 context, sconn->retry_timeout, 0,
738 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
741 /* Generic routine to use connect to a router. */
743 SILC_TASK_CALLBACK(silc_server_connect_router)
745 SilcServerConnection sconn = (SilcServerConnection)context;
746 SilcServer server = sconn->server;
747 SilcServerConfigRouter *rconn;
750 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
751 (sconn->backup ? "backup router" : "router"),
752 sconn->remote_host, sconn->remote_port));
754 server->router_connect = time(NULL);
755 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
758 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
759 (sconn->backup ? "backup router" : "router"),
760 sconn->remote_host, sconn->remote_port));
761 silc_free(sconn->remote_host);
762 silc_free(sconn->backup_replace_ip);
766 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
768 /* Connect to remote host */
769 sock = silc_net_create_connection(
770 (!server->config->server_info->primary ? NULL :
771 server->config->server_info->primary->server_ip),
772 sconn->remote_port, sconn->remote_host);
774 SILC_LOG_ERROR(("Could not connect to router %s:%d",
775 sconn->remote_host, sconn->remote_port));
776 if (!sconn->no_reconnect)
777 silc_schedule_task_add(server->schedule, 0,
778 silc_server_connect_to_router_retry,
779 context, 0, 1, SILC_TASK_TIMEOUT,
780 SILC_TASK_PRI_NORMAL);
782 silc_server_config_unref(&sconn->conn);
786 /* Continue with key exchange protocol */
787 silc_server_start_key_exchange(server, sconn, sock);
790 /* This function connects to our primary router or if we are a router this
791 establishes all our primary routes. This is called at the start of the
792 server to do authentication and key exchange with our router - called
795 SILC_TASK_CALLBACK(silc_server_connect_to_router)
797 SilcServer server = (SilcServer)context;
798 SilcServerConnection sconn;
799 SilcServerConfigRouter *ptr;
801 SILC_LOG_DEBUG(("Connecting to router(s)"));
803 if (server->server_type == SILC_SERVER) {
804 SILC_LOG_DEBUG(("We are normal server"));
805 } else if (server->server_type == SILC_ROUTER) {
806 SILC_LOG_DEBUG(("We are router"));
808 SILC_LOG_DEBUG(("We are backup router/normal server"));
811 if (!server->config->routers) {
812 /* There wasn't a configured router, we will continue but we don't
813 have a connection to outside world. We will be standalone server. */
814 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
815 server->standalone = TRUE;
819 /* Cancel any possible retry timeouts */
820 silc_schedule_task_del_by_callback(server->schedule,
821 silc_server_connect_router);
822 silc_schedule_task_del_by_callback(server->schedule,
823 silc_server_connect_to_router_retry);
825 /* Create the connections to all our routes */
826 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
828 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
829 ptr->backup_router ? "Backup router" : "Router",
830 ptr->initiator ? "Initiator" : "Responder",
831 ptr->host, ptr->port));
833 if (ptr->initiator) {
834 /* Check whether we are connected to this host already */
835 if (silc_server_num_sockets_by_remote(server,
836 silc_net_is_ip(ptr->host) ?
838 silc_net_is_ip(ptr->host) ?
839 NULL : ptr->host, ptr->port,
840 SILC_SOCKET_TYPE_ROUTER)) {
841 SILC_LOG_DEBUG(("We are already connected to this router"));
845 /* Allocate connection object for hold connection specific stuff. */
846 sconn = silc_calloc(1, sizeof(*sconn));
847 sconn->server = server;
848 sconn->remote_host = strdup(ptr->host);
849 sconn->remote_port = ptr->port;
850 sconn->backup = ptr->backup_router;
852 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
853 sconn->backup_replace_port = ptr->backup_replace_port;
856 if (!server->router_conn && !sconn->backup)
857 server->router_conn = sconn;
859 silc_schedule_task_add(server->schedule, 0,
860 silc_server_connect_router,
861 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
862 SILC_TASK_PRI_NORMAL);
867 /* Second part of connecting to router(s). Key exchange protocol has been
868 executed and now we will execute authentication protocol. */
870 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
872 SilcProtocol protocol = (SilcProtocol)context;
873 SilcServerKEInternalContext *ctx =
874 (SilcServerKEInternalContext *)protocol->context;
875 SilcServer server = (SilcServer)ctx->server;
876 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
877 SilcSocketConnection sock = ctx->sock;
878 SilcServerConnAuthInternalContext *proto_ctx;
879 SilcServerConfigRouter *conn = NULL;
881 SILC_LOG_DEBUG(("Start"));
883 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
884 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
885 /* Error occured during protocol */
886 silc_protocol_free(protocol);
887 sock->protocol = NULL;
888 silc_ske_free_key_material(ctx->keymat);
890 silc_packet_context_free(ctx->packet);
892 silc_ske_free(ctx->ske);
893 silc_free(ctx->dest_id);
895 silc_server_config_unref(&sconn->conn);
896 silc_free(sconn->remote_host);
897 silc_free(sconn->backup_replace_ip);
899 silc_schedule_task_del_by_callback(server->schedule,
900 silc_server_failure_callback);
901 silc_server_disconnect_remote(server, sock,
902 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
906 /* We now have the key material as the result of the key exchange
907 protocol. Take the key material into use. Free the raw key material
908 as soon as we've set them into use. */
909 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
910 ctx->sock, ctx->keymat,
911 ctx->ske->prop->cipher,
912 ctx->ske->prop->pkcs,
913 ctx->ske->prop->hash,
914 ctx->ske->prop->hmac,
915 ctx->ske->prop->group,
917 silc_protocol_free(protocol);
918 sock->protocol = NULL;
919 silc_ske_free_key_material(ctx->keymat);
921 silc_packet_context_free(ctx->packet);
923 silc_ske_free(ctx->ske);
924 silc_free(ctx->dest_id);
926 silc_server_config_unref(&sconn->conn);
927 silc_free(sconn->remote_host);
928 silc_free(sconn->backup_replace_ip);
930 silc_schedule_task_del_by_callback(server->schedule,
931 silc_server_failure_callback);
932 silc_server_disconnect_remote(server, sock,
933 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
936 silc_ske_free_key_material(ctx->keymat);
938 /* Allocate internal context for the authentication protocol. This
939 is sent as context for the protocol. */
940 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
941 proto_ctx->server = (void *)server;
942 proto_ctx->context = (void *)sconn;
943 proto_ctx->sock = sock;
944 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
945 proto_ctx->dest_id_type = ctx->dest_id_type;
946 proto_ctx->dest_id = ctx->dest_id;
948 /* Resolve the authentication method used in this connection. Check if
949 we find a match from user configured connections */
950 if (!sconn->conn.ref_ptr)
951 conn = silc_server_config_find_router_conn(server, sock->hostname,
954 conn = sconn->conn.ref_ptr;
957 /* Match found. Use the configured authentication method. Take only
958 the passphrase, since for public key auth we automatically use
959 our local key pair. */
960 if (conn->passphrase) {
961 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
962 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
964 proto_ctx->auth_data = strdup(conn->passphrase);
965 proto_ctx->auth_data_len = strlen(conn->passphrase);
966 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
968 } else if (conn->publickeys) {
969 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
971 proto_ctx->auth_meth = SILC_AUTH_NONE;
974 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
975 sock->hostname, sock->ip, sock->port));
976 silc_protocol_free(protocol);
977 sock->protocol = NULL;
979 silc_packet_context_free(ctx->packet);
981 silc_ske_free(ctx->ske);
982 silc_free(ctx->dest_id);
984 silc_server_config_unref(&sconn->conn);
985 silc_free(sconn->remote_host);
986 silc_free(sconn->backup_replace_ip);
988 silc_schedule_task_del_by_callback(server->schedule,
989 silc_server_failure_callback);
990 silc_server_disconnect_remote(server, sock,
991 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
995 /* Free old protocol as it is finished now */
996 silc_protocol_free(protocol);
998 silc_packet_context_free(ctx->packet);
1000 sock->protocol = NULL;
1002 /* Allocate the authentication protocol. This is allocated here
1003 but we won't start it yet. We will be receiving party of this
1004 protocol thus we will wait that connecting party will make
1005 their first move. */
1006 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1007 &sock->protocol, proto_ctx,
1008 silc_server_connect_to_router_final);
1010 /* Register timeout task. If the protocol is not executed inside
1011 this timelimit the connection will be terminated. */
1012 proto_ctx->timeout_task =
1013 silc_schedule_task_add(server->schedule, sock->sock,
1014 silc_server_timeout_remote,
1016 server->config->conn_auth_timeout, 0,
1020 /* Run the protocol */
1021 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1024 /* Finalizes the connection to router. Registers a server task to the
1025 queue so that we can accept new connections. */
1027 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1029 SilcProtocol protocol = (SilcProtocol)context;
1030 SilcServerConnAuthInternalContext *ctx =
1031 (SilcServerConnAuthInternalContext *)protocol->context;
1032 SilcServer server = (SilcServer)ctx->server;
1033 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1034 SilcSocketConnection sock = ctx->sock;
1035 SilcServerEntry id_entry;
1037 SilcServerHBContext hb_context;
1038 unsigned char *id_string;
1040 SilcIDListData idata;
1041 SilcServerConfigRouter *conn = NULL;
1042 SilcServerConfigConnParams *param = NULL;
1044 SILC_LOG_DEBUG(("Start"));
1046 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1047 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1048 /* Error occured during protocol */
1049 silc_free(ctx->dest_id);
1050 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1055 /* Add a task to the queue. This task receives new connections to the
1056 server. This task remains on the queue until the end of the program. */
1057 if (!server->listenning && !sconn->backup) {
1058 silc_schedule_task_add(server->schedule, server->sock,
1059 silc_server_accept_new_connection,
1060 (void *)server, 0, 0,
1062 SILC_TASK_PRI_NORMAL);
1063 server->listenning = TRUE;
1066 /* Send NEW_SERVER packet to the router. We will become registered
1067 to the SILC network after sending this packet. */
1068 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1069 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1070 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1071 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1072 silc_buffer_format(packet,
1073 SILC_STR_UI_SHORT(id_len),
1074 SILC_STR_UI_XNSTRING(id_string, id_len),
1075 SILC_STR_UI_SHORT(strlen(server->server_name)),
1076 SILC_STR_UI_XNSTRING(server->server_name,
1077 strlen(server->server_name)),
1080 /* Send the packet */
1081 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1082 packet->data, packet->len, TRUE);
1083 silc_buffer_free(packet);
1084 silc_free(id_string);
1086 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1088 /* Check that we do not have this ID already */
1089 id_entry = silc_idlist_find_server_by_id(server->local_list,
1090 ctx->dest_id, TRUE, NULL);
1092 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1094 id_entry = silc_idlist_find_server_by_id(server->global_list,
1095 ctx->dest_id, TRUE, NULL);
1097 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1100 SILC_LOG_DEBUG(("New server id(%s)",
1101 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1103 /* Add the connected router to global server list */
1104 id_entry = silc_idlist_add_server(server->global_list,
1105 strdup(sock->hostname),
1106 SILC_ROUTER, ctx->dest_id, NULL, sock);
1108 silc_free(ctx->dest_id);
1109 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1110 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1115 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1116 silc_free(sock->user_data);
1117 sock->user_data = (void *)id_entry;
1118 sock->type = SILC_SOCKET_TYPE_ROUTER;
1119 idata = (SilcIDListData)sock->user_data;
1120 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1122 conn = sconn->conn.ref_ptr;
1123 param = &server->config->param;
1124 if (conn && conn->param)
1125 param = conn->param;
1127 /* Perform keepalive. The `hb_context' will be freed automatically
1128 when finally calling the silc_socket_free function. */
1129 hb_context = silc_calloc(1, sizeof(*hb_context));
1130 hb_context->server = server;
1131 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1132 silc_server_perform_heartbeat,
1135 /* Register re-key timeout */
1136 idata->rekey->timeout = param->key_exchange_rekey;
1137 idata->rekey->context = (void *)server;
1138 silc_schedule_task_add(server->schedule, sock->sock,
1139 silc_server_rekey_callback,
1140 (void *)sock, idata->rekey->timeout, 0,
1141 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1143 if (!sconn->backup) {
1144 /* Mark this router our primary router if we're still standalone */
1145 if (server->standalone) {
1146 server->id_entry->router = id_entry;
1147 server->router = id_entry;
1148 server->standalone = FALSE;
1150 /* If we are router then announce our possible servers. */
1151 if (server->server_type == SILC_ROUTER)
1152 silc_server_announce_servers(server, FALSE, 0,
1153 SILC_PRIMARY_ROUTE(server));
1155 /* Announce our clients and channels to the router */
1156 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1157 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1159 #ifdef BACKUP_SINGLE_ROUTER
1160 /* If we are backup router then this primary router is whom we are
1162 if (server->server_type == SILC_BACKUP_ROUTER)
1163 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1164 #endif /* BACKUP_SINGLE_ROUTER */
1167 /* Add this server to be our backup router */
1168 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1169 sconn->backup_replace_port, FALSE);
1172 sock->protocol = NULL;
1174 /* Call the completion callback to indicate that we've connected to
1176 if (sconn->callback)
1177 (*sconn->callback)(server, id_entry, sconn->callback_context);
1180 /* Free the temporary connection data context */
1182 silc_server_config_unref(&sconn->conn);
1183 silc_free(sconn->remote_host);
1184 silc_free(sconn->backup_replace_ip);
1187 if (sconn == server->router_conn)
1188 server->router_conn = NULL;
1190 /* Free the protocol object */
1191 if (sock->protocol == protocol)
1192 sock->protocol = NULL;
1193 silc_protocol_free(protocol);
1195 silc_packet_context_free(ctx->packet);
1197 silc_ske_free(ctx->ske);
1198 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1199 silc_free(ctx->auth_data);
1203 /* Host lookup callback that is called after the incoming connection's
1204 IP and FQDN lookup is performed. This will actually check the acceptance
1205 of the incoming connection and will register the key exchange protocol
1206 for this connection. */
1209 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1212 SilcServerKEInternalContext *proto_ctx =
1213 (SilcServerKEInternalContext *)context;
1214 SilcServer server = (SilcServer)proto_ctx->server;
1215 SilcServerConfigClient *cconfig = NULL;
1216 SilcServerConfigServer *sconfig = NULL;
1217 SilcServerConfigRouter *rconfig = NULL;
1218 SilcServerConfigDeny *deny;
1221 context = (void *)server;
1223 /* Check whether we could resolve both IP and FQDN. */
1224 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1225 server->config->require_reverse_lookup)) {
1226 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1227 sock->hostname ? sock->hostname :
1228 sock->ip ? sock->ip : ""));
1229 server->stat.conn_failures++;
1230 silc_server_disconnect_remote(server, sock,
1231 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1232 "Unknown host or IP");
1233 silc_free(proto_ctx);
1237 /* Register the connection for network input and output. This sets
1238 that scheduler will listen for incoming packets for this connection
1239 and sets that outgoing packets may be sent to this connection as well.
1240 However, this doesn't set the scheduler for outgoing traffic, it
1241 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1242 later when outgoing data is available. */
1243 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1245 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1248 /* Listenning port */
1249 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1250 silc_server_disconnect_remote(server, sock,
1251 SILC_STATUS_ERR_RESOURCE_LIMIT,
1252 "Connection refused");
1253 server->stat.conn_failures++;
1254 silc_free(proto_ctx);
1257 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1259 /* Check whether this connection is denied to connect to us. */
1260 deny = silc_server_config_find_denied(server, sock->ip);
1262 deny = silc_server_config_find_denied(server, sock->hostname);
1264 /* The connection is denied */
1265 SILC_LOG_INFO(("Connection %s (%s) is denied",
1266 sock->hostname, sock->ip));
1267 silc_server_disconnect_remote(server, sock,
1268 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1270 server->stat.conn_failures++;
1271 silc_free(proto_ctx);
1275 /* Check whether we have configured this sort of connection at all. We
1276 have to check all configurations since we don't know what type of
1277 connection this is. */
1278 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1279 cconfig = silc_server_config_find_client(server, sock->hostname);
1280 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1281 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1282 if (server->server_type == SILC_ROUTER) {
1283 if (!(rconfig = silc_server_config_find_router_conn(server,
1284 sock->ip, sock->port)))
1285 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1288 if (!cconfig && !sconfig && !rconfig) {
1289 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1291 silc_server_disconnect_remote(server, sock,
1292 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1293 server->stat.conn_failures++;
1294 silc_free(proto_ctx);
1298 /* The connection is allowed */
1300 /* Set internal context for key exchange protocol. This is
1301 sent as context for the protocol. */
1302 proto_ctx->sock = sock;
1303 proto_ctx->rng = server->rng;
1304 proto_ctx->responder = TRUE;
1305 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1306 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1307 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1309 /* Take flags for key exchange. Since we do not know what type of connection
1310 this is, we go through all found configurations and use the global ones
1311 as well. This will result always into strictest key exchange flags. */
1312 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1313 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1314 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1315 if (server->config->param.key_exchange_pfs)
1316 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1318 /* Prepare the connection for key exchange protocol. We allocate the
1319 protocol but will not start it yet. The connector will be the
1320 initiator of the protocol thus we will wait for initiation from
1321 there before we start the protocol. */
1322 server->stat.auth_attempts++;
1323 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1324 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1325 &sock->protocol, proto_ctx,
1326 silc_server_accept_new_connection_second);
1328 /* Register a timeout task that will be executed if the connector
1329 will not start the key exchange protocol within specified timeout
1330 and the connection will be closed. */
1331 proto_ctx->timeout_task =
1332 silc_schedule_task_add(server->schedule, sock->sock,
1333 silc_server_timeout_remote,
1335 server->config->key_exchange_timeout, 0,
1340 /* Accepts new connections to the server. Accepting new connections are
1341 done in three parts to make it async. */
1343 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1345 SilcServer server = (SilcServer)context;
1346 SilcSocketConnection newsocket;
1347 SilcServerKEInternalContext *proto_ctx;
1350 SILC_LOG_DEBUG(("Accepting new connection"));
1352 server->stat.conn_attempts++;
1354 sock = silc_net_accept_connection(fd);
1356 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1357 server->stat.conn_failures++;
1361 /* Check for maximum allowed connections */
1362 if (sock > server->config->param.connections_max) {
1363 SILC_LOG_ERROR(("Refusing connection, server is full"));
1364 server->stat.conn_failures++;
1365 silc_net_close_connection(sock);
1369 /* Set socket options */
1370 silc_net_set_socket_nonblock(sock);
1371 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1373 /* We don't create a ID yet, since we don't know what type of connection
1374 this is yet. But, we do add the connection to the socket table. */
1375 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1376 server->sockets[sock] = newsocket;
1378 /* Perform asynchronous host lookup. This will lookup the IP and the
1379 FQDN of the remote connection. After the lookup is done the connection
1380 is accepted further. */
1381 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1382 proto_ctx->server = server;
1383 proto_ctx->context = (void *)fd;
1384 silc_socket_host_lookup(newsocket, TRUE,
1385 silc_server_accept_new_connection_lookup,
1386 (void *)proto_ctx, server->schedule);
1389 /* Second part of accepting new connection. Key exchange protocol has been
1390 performed and now it is time to do little connection authentication
1391 protocol to figure out whether this connection is client or server
1392 and whether it has right to access this server (especially server
1393 connections needs to be authenticated). */
1395 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1397 SilcProtocol protocol = (SilcProtocol)context;
1398 SilcServerKEInternalContext *ctx =
1399 (SilcServerKEInternalContext *)protocol->context;
1400 SilcServer server = (SilcServer)ctx->server;
1401 SilcSocketConnection sock = ctx->sock;
1402 SilcServerConnAuthInternalContext *proto_ctx;
1404 SILC_LOG_DEBUG(("Start"));
1406 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1407 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1408 /* Error occured during protocol */
1409 SILC_LOG_DEBUG(("Error key exchange protocol"));
1410 silc_protocol_free(protocol);
1411 sock->protocol = NULL;
1412 silc_ske_free_key_material(ctx->keymat);
1414 silc_packet_context_free(ctx->packet);
1416 silc_ske_free(ctx->ske);
1417 silc_free(ctx->dest_id);
1418 silc_server_config_unref(&ctx->cconfig);
1419 silc_server_config_unref(&ctx->sconfig);
1420 silc_server_config_unref(&ctx->rconfig);
1422 silc_schedule_task_del_by_callback(server->schedule,
1423 silc_server_failure_callback);
1424 silc_server_disconnect_remote(server, sock,
1425 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1427 server->stat.auth_failures++;
1431 /* We now have the key material as the result of the key exchange
1432 protocol. Take the key material into use. Free the raw key material
1433 as soon as we've set them into use. */
1434 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1435 ctx->sock, ctx->keymat,
1436 ctx->ske->prop->cipher,
1437 ctx->ske->prop->pkcs,
1438 ctx->ske->prop->hash,
1439 ctx->ske->prop->hmac,
1440 ctx->ske->prop->group,
1442 SILC_LOG_ERROR(("Error setting key material in use"));
1443 silc_protocol_free(protocol);
1444 sock->protocol = NULL;
1445 silc_ske_free_key_material(ctx->keymat);
1447 silc_packet_context_free(ctx->packet);
1449 silc_ske_free(ctx->ske);
1450 silc_free(ctx->dest_id);
1451 silc_server_config_unref(&ctx->cconfig);
1452 silc_server_config_unref(&ctx->sconfig);
1453 silc_server_config_unref(&ctx->rconfig);
1455 silc_schedule_task_del_by_callback(server->schedule,
1456 silc_server_failure_callback);
1457 silc_server_disconnect_remote(server, sock,
1458 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1459 server->stat.auth_failures++;
1462 silc_ske_free_key_material(ctx->keymat);
1464 /* Allocate internal context for the authentication protocol. This
1465 is sent as context for the protocol. */
1466 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1467 proto_ctx->server = (void *)server;
1468 proto_ctx->sock = sock;
1469 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1470 proto_ctx->responder = TRUE;
1471 proto_ctx->dest_id_type = ctx->dest_id_type;
1472 proto_ctx->dest_id = ctx->dest_id;
1473 proto_ctx->cconfig = ctx->cconfig;
1474 proto_ctx->sconfig = ctx->sconfig;
1475 proto_ctx->rconfig = ctx->rconfig;
1477 /* Free old protocol as it is finished now */
1478 silc_protocol_free(protocol);
1480 silc_packet_context_free(ctx->packet);
1482 sock->protocol = NULL;
1484 /* Allocate the authentication protocol. This is allocated here
1485 but we won't start it yet. We will be receiving party of this
1486 protocol thus we will wait that connecting party will make
1487 their first move. */
1488 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1489 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1490 &sock->protocol, proto_ctx,
1491 silc_server_accept_new_connection_final);
1493 /* Register timeout task. If the protocol is not executed inside
1494 this timelimit the connection will be terminated. */
1495 proto_ctx->timeout_task =
1496 silc_schedule_task_add(server->schedule, sock->sock,
1497 silc_server_timeout_remote,
1499 server->config->conn_auth_timeout, 0,
1504 /* Final part of accepting new connection. The connection has now
1505 been authenticated and keys has been exchanged. We also know whether
1506 this is client or server connection. */
1508 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1510 SilcProtocol protocol = (SilcProtocol)context;
1511 SilcServerConnAuthInternalContext *ctx =
1512 (SilcServerConnAuthInternalContext *)protocol->context;
1513 SilcServer server = (SilcServer)ctx->server;
1514 SilcSocketConnection sock = ctx->sock;
1515 SilcServerHBContext hb_context;
1516 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1518 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1520 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1521 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1522 /* Error occured during protocol */
1523 SILC_LOG_DEBUG(("Error during authentication protocol"));
1524 silc_protocol_free(protocol);
1525 sock->protocol = NULL;
1527 silc_packet_context_free(ctx->packet);
1529 silc_ske_free(ctx->ske);
1530 silc_free(ctx->dest_id);
1531 silc_server_config_unref(&ctx->cconfig);
1532 silc_server_config_unref(&ctx->sconfig);
1533 silc_server_config_unref(&ctx->rconfig);
1535 silc_schedule_task_del_by_callback(server->schedule,
1536 silc_server_failure_callback);
1537 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1539 server->stat.auth_failures++;
1543 entry->data.last_receive = time(NULL);
1545 switch (ctx->conn_type) {
1546 case SILC_SOCKET_TYPE_CLIENT:
1548 SilcClientEntry client;
1549 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1551 /* Verify whether this connection is after all allowed to connect */
1552 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1553 &server->config->param,
1554 conn->param, ctx->ske)) {
1555 server->stat.auth_failures++;
1559 SILC_LOG_DEBUG(("Remote host is client"));
1560 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1563 /* Add the client to the client ID cache. The nickname and Client ID
1564 and other information is created after we have received NEW_CLIENT
1565 packet from client. */
1566 client = silc_idlist_add_client(server->local_list,
1567 NULL, NULL, NULL, NULL, NULL, sock, 0);
1569 SILC_LOG_ERROR(("Could not add new client to cache"));
1570 silc_free(sock->user_data);
1571 silc_server_disconnect_remote(server, sock,
1572 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1573 server->stat.auth_failures++;
1578 server->stat.my_clients++;
1579 server->stat.clients++;
1580 server->stat.cell_clients++;
1582 /* Get connection parameters */
1584 if (conn->param->keepalive_secs)
1585 hearbeat_timeout = conn->param->keepalive_secs;
1588 id_entry = (void *)client;
1591 case SILC_SOCKET_TYPE_SERVER:
1592 case SILC_SOCKET_TYPE_ROUTER:
1594 SilcServerEntry new_server;
1595 bool initiator = FALSE;
1596 bool backup_local = FALSE;
1597 bool backup_router = FALSE;
1598 char *backup_replace_ip = NULL;
1599 SilcUInt16 backup_replace_port = 0;
1600 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1601 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1603 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1604 /* Verify whether this connection is after all allowed to connect */
1605 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1606 &server->config->param,
1607 rconn ? rconn->param : NULL,
1609 server->stat.auth_failures++;
1615 if (rconn->param->keepalive_secs)
1616 hearbeat_timeout = rconn->param->keepalive_secs;
1619 initiator = rconn->initiator;
1620 backup_local = rconn->backup_local;
1621 backup_router = rconn->backup_router;
1622 backup_replace_ip = rconn->backup_replace_ip;
1623 backup_replace_port = rconn->backup_replace_port;
1627 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1628 /* Verify whether this connection is after all allowed to connect */
1629 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1630 &server->config->param,
1631 sconn ? sconn->param : NULL,
1633 server->stat.auth_failures++;
1638 if (sconn->param->keepalive_secs)
1639 hearbeat_timeout = sconn->param->keepalive_secs;
1642 backup_router = sconn->backup_router;
1646 SILC_LOG_DEBUG(("Remote host is %s",
1647 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1648 "server" : (backup_router ?
1649 "backup router" : "router")));
1650 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1651 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1652 "server" : (backup_router ?
1653 "backup router" : "router")));
1655 /* Add the server into server cache. The server name and Server ID
1656 is updated after we have received NEW_SERVER packet from the
1657 server. We mark ourselves as router for this server if we really
1660 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1661 server->local_list : (backup_router ?
1662 server->local_list :
1663 server->global_list)),
1665 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1666 SILC_SERVER : SILC_ROUTER),
1668 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1669 server->id_entry : (backup_router ?
1670 server->id_entry : NULL)),
1673 SILC_LOG_ERROR(("Could not add new server to cache"));
1674 silc_free(sock->user_data);
1675 silc_server_disconnect_remote(server, sock,
1676 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1677 server->stat.auth_failures++;
1682 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1683 server->stat.my_servers++;
1685 server->stat.my_routers++;
1686 server->stat.routers++;
1688 server->stat.servers++;
1690 id_entry = (void *)new_server;
1692 /* If the incoming connection is router and marked as backup router
1693 then add it to be one of our backups */
1694 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1695 silc_server_backup_add(server, new_server, backup_replace_ip,
1696 backup_replace_port, backup_local);
1698 /* Change it back to SERVER type since that's what it really is. */
1700 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1702 new_server->server_type = SILC_BACKUP_ROUTER;
1705 /* Check whether this connection is to be our primary router connection
1706 if we do not already have the primary route. */
1707 if (!backup_router &&
1708 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1709 if (silc_server_config_is_primary_route(server) && !initiator)
1712 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1713 server->standalone = FALSE;
1714 if (!server->id_entry->router) {
1715 server->id_entry->router = id_entry;
1716 server->router = id_entry;
1727 sock->type = ctx->conn_type;
1729 /* Add the common data structure to the ID entry. */
1730 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1732 /* Add to sockets internal pointer for fast referencing */
1733 silc_free(sock->user_data);
1734 sock->user_data = id_entry;
1736 /* Connection has been fully established now. Everything is ok. */
1737 SILC_LOG_DEBUG(("New connection authenticated"));
1739 /* Perform keepalive. The `hb_context' will be freed automatically
1740 when finally calling the silc_socket_free function. */
1741 hb_context = silc_calloc(1, sizeof(*hb_context));
1742 hb_context->server = server;
1743 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1744 silc_server_perform_heartbeat,
1748 silc_schedule_task_del_by_callback(server->schedule,
1749 silc_server_failure_callback);
1750 silc_protocol_free(protocol);
1752 silc_packet_context_free(ctx->packet);
1754 silc_ske_free(ctx->ske);
1755 silc_free(ctx->dest_id);
1756 silc_server_config_unref(&ctx->cconfig);
1757 silc_server_config_unref(&ctx->sconfig);
1758 silc_server_config_unref(&ctx->rconfig);
1760 sock->protocol = NULL;
1763 /* This function is used to read packets from network and send packets to
1764 network. This is usually a generic task. */
1766 SILC_TASK_CALLBACK(silc_server_packet_process)
1768 SilcServer server = (SilcServer)context;
1769 SilcSocketConnection sock = server->sockets[fd];
1770 SilcIDListData idata;
1771 SilcCipher cipher = NULL;
1772 SilcHmac hmac = NULL;
1773 SilcUInt32 sequence = 0;
1777 SILC_LOG_DEBUG(("Unknown socket connection"));
1781 /* Packet sending */
1783 if (type == SILC_TASK_WRITE) {
1784 /* Do not send data to disconnected connection */
1785 if (SILC_IS_DISCONNECTED(sock)) {
1786 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
1790 server->stat.packets_sent++;
1792 /* Send the packet */
1793 ret = silc_packet_send(sock, TRUE);
1795 /* If returned -2 could not write to connection now, will do
1801 SILC_LOG_ERROR(("Error sending packet to connection "
1802 "%s:%d [%s]", sock->hostname, sock->port,
1803 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1804 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1805 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1810 /* The packet has been sent and now it is time to set the connection
1811 back to only for input. When there is again some outgoing data
1812 available for this connection it will be set for output as well.
1813 This call clears the output setting and sets it only for input. */
1814 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1815 SILC_UNSET_OUTBUF_PENDING(sock);
1817 silc_buffer_clear(sock->outbuf);
1821 /* Packet receiving */
1823 /* Read some data from connection */
1824 ret = silc_packet_receive(sock);
1828 SILC_LOG_ERROR(("Error receiving packet from connection "
1829 "%s:%d [%s] %s", sock->hostname, sock->port,
1830 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1831 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1832 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1833 "Router"), strerror(errno)));
1839 SILC_LOG_DEBUG(("Read EOF"));
1841 /* If connection is disconnecting already we will finally
1842 close the connection */
1843 if (SILC_IS_DISCONNECTING(sock)) {
1844 if (sock->user_data)
1845 silc_server_free_sock_user_data(server, sock, NULL);
1846 silc_server_close_connection(server, sock);
1850 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1851 SILC_SET_DISCONNECTING(sock);
1853 if (sock->user_data) {
1855 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1856 silc_server_free_sock_user_data(server, sock, tmp);
1858 silc_server_free_sock_user_data(server, sock, NULL);
1859 } else if (server->router_conn && server->router_conn->sock == sock &&
1860 !server->router && server->standalone)
1861 silc_schedule_task_add(server->schedule, 0,
1862 silc_server_connect_to_router,
1865 SILC_TASK_PRI_NORMAL);
1867 silc_server_close_connection(server, sock);
1871 /* If connection is disconnecting or disconnected we will ignore
1873 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1874 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1878 server->stat.packets_received++;
1880 /* Get keys and stuff from ID entry */
1881 idata = (SilcIDListData)sock->user_data;
1883 cipher = idata->receive_key;
1884 hmac = idata->hmac_receive;
1885 sequence = idata->psn_receive;
1888 /* Process the packet. This will call the parser that will then
1889 decrypt and parse the packet. */
1890 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1891 TRUE : FALSE, cipher, hmac, sequence,
1892 silc_server_packet_parse, server);
1894 /* If this socket connection is not authenticated yet and the packet
1895 processing failed we will drop the connection since it can be
1896 a malicious flooder. */
1897 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1898 (!sock->protocol || sock->protocol->protocol->type ==
1899 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1900 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1901 SILC_SET_DISCONNECTING(sock);
1903 if (sock->user_data)
1904 silc_server_free_sock_user_data(server, sock, NULL);
1905 silc_server_close_connection(server, sock);
1909 /* Parses whole packet, received earlier. */
1911 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1913 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1914 SilcServer server = (SilcServer)parse_ctx->context;
1915 SilcSocketConnection sock = parse_ctx->sock;
1916 SilcPacketContext *packet = parse_ctx->packet;
1917 SilcIDListData idata = (SilcIDListData)sock->user_data;
1920 /* Parse the packet */
1921 if (parse_ctx->normal)
1922 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1924 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1926 /* If entry is disabled ignore what we got. */
1927 if (ret != SILC_PACKET_RESUME_ROUTER &&
1928 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1929 SILC_LOG_DEBUG(("Connection is disabled"));
1933 if (ret == SILC_PACKET_NONE) {
1934 SILC_LOG_DEBUG(("Error parsing packet"));
1938 /* Check that the the current client ID is same as in the client's packet. */
1939 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1940 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1941 if (client && client->id) {
1942 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1943 packet->src_id_type);
1944 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1946 SILC_LOG_DEBUG(("Packet source is not same as sender"));
1953 if (server->server_type == SILC_ROUTER) {
1954 /* Route the packet if it is not destined to us. Other ID types but
1955 server are handled separately after processing them. */
1956 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1957 packet->dst_id_type == SILC_ID_SERVER &&
1958 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1959 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1961 /* Route the packet to fastest route for the destination ID */
1962 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1963 packet->dst_id_type);
1966 silc_server_packet_route(server,
1967 silc_server_route_get(server, id,
1968 packet->dst_id_type),
1975 /* Parse the incoming packet type */
1976 silc_server_packet_parse_type(server, sock, packet);
1978 /* Broadcast packet if it is marked as broadcast packet and it is
1979 originated from router and we are router. */
1980 if (server->server_type == SILC_ROUTER &&
1981 sock->type == SILC_SOCKET_TYPE_ROUTER &&
1982 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1983 /* Broadcast to our primary route */
1984 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
1986 /* If we have backup routers then we need to feed all broadcast
1987 data to those servers. */
1988 silc_server_backup_broadcast(server, sock, packet);
1992 silc_packet_context_free(packet);
1993 silc_free(parse_ctx);
1996 /* Parser callback called by silc_packet_receive_process. This merely
1997 registers timeout that will handle the actual parsing when appropriate. */
1999 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2002 SilcServer server = (SilcServer)context;
2003 SilcSocketConnection sock = parser_context->sock;
2004 SilcIDListData idata = (SilcIDListData)sock->user_data;
2007 idata->psn_receive = parser_context->packet->sequence + 1;
2009 /* If protocol for this connection is key exchange or rekey then we'll
2010 process all packets synchronously, since there might be packets in
2011 queue that we are not able to decrypt without first processing the
2012 packets before them. */
2013 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2014 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2015 (sock->protocol && sock->protocol->protocol &&
2016 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2017 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2018 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2021 /* Reprocess data since we'll return FALSE here. This is because
2022 the idata->receive_key might have become valid in the last packet
2023 and we want to call this processor with valid cipher. */
2025 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2026 TRUE : FALSE, idata->receive_key,
2027 idata->hmac_receive, idata->psn_receive,
2028 silc_server_packet_parse, server);
2030 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2031 TRUE : FALSE, NULL, NULL, 0,
2032 silc_server_packet_parse, server);
2036 switch (sock->type) {
2037 case SILC_SOCKET_TYPE_UNKNOWN:
2038 case SILC_SOCKET_TYPE_CLIENT:
2039 /* Parse the packet with timeout */
2040 silc_schedule_task_add(server->schedule, sock->sock,
2041 silc_server_packet_parse_real,
2042 (void *)parser_context, 0, 100000,
2044 SILC_TASK_PRI_NORMAL);
2046 case SILC_SOCKET_TYPE_SERVER:
2047 case SILC_SOCKET_TYPE_ROUTER:
2048 /* Packets from servers are parsed immediately */
2049 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2059 /* Parses the packet type and calls what ever routines the packet type
2060 requires. This is done for all incoming packets. */
2062 void silc_server_packet_parse_type(SilcServer server,
2063 SilcSocketConnection sock,
2064 SilcPacketContext *packet)
2066 SilcPacketType type = packet->type;
2067 SilcIDListData idata = (SilcIDListData)sock->user_data;
2069 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2070 silc_get_packet_name(type), packet->flags));
2072 /* Parse the packet type */
2074 case SILC_PACKET_DISCONNECT:
2077 char *message = NULL;
2079 if (packet->flags & SILC_PACKET_FLAG_LIST)
2081 if (packet->buffer->len < 1)
2084 status = (SilcStatus)packet->buffer->data[0];
2085 if (packet->buffer->len > 1 &&
2086 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2087 message = silc_memdup(packet->buffer->data + 1,
2088 packet->buffer->len - 1);
2090 SILC_LOG_ERROR(("Disconnected by %s (%s): %s (%d) %s",
2091 sock->ip, sock->hostname,
2092 silc_get_status_message(status), status,
2093 message ? message : ""));
2098 case SILC_PACKET_SUCCESS:
2100 * Success received for something. For now we can have only
2101 * one protocol for connection executing at once hence this
2102 * success message is for whatever protocol is executing currently.
2104 if (packet->flags & SILC_PACKET_FLAG_LIST)
2107 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2110 case SILC_PACKET_FAILURE:
2112 * Failure received for something. For now we can have only
2113 * one protocol for connection executing at once hence this
2114 * failure message is for whatever protocol is executing currently.
2116 if (packet->flags & SILC_PACKET_FLAG_LIST)
2118 if (sock->protocol) {
2119 SilcServerFailureContext f;
2120 f = silc_calloc(1, sizeof(*f));
2124 /* We will wait 5 seconds to process this failure packet */
2125 silc_schedule_task_add(server->schedule, sock->sock,
2126 silc_server_failure_callback, (void *)f, 5, 0,
2127 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2131 case SILC_PACKET_REJECT:
2132 if (packet->flags & SILC_PACKET_FLAG_LIST)
2137 case SILC_PACKET_NOTIFY:
2139 * Received notify packet. Server can receive notify packets from
2140 * router. Server then relays the notify messages to clients if needed.
2142 if (packet->flags & SILC_PACKET_FLAG_LIST)
2143 silc_server_notify_list(server, sock, packet);
2145 silc_server_notify(server, sock, packet);
2151 case SILC_PACKET_CHANNEL_MESSAGE:
2153 * Received channel message. Channel messages are special packets
2154 * (although probably most common ones) thus they are handled
2157 if (packet->flags & SILC_PACKET_FLAG_LIST)
2159 idata->last_receive = time(NULL);
2160 silc_server_channel_message(server, sock, packet);
2163 case SILC_PACKET_CHANNEL_KEY:
2165 * Received key for channel. As channels are created by the router
2166 * the keys are as well. We will distribute the key to all of our
2167 * locally connected clients on the particular channel. Router
2168 * never receives this channel and thus is ignored.
2170 if (packet->flags & SILC_PACKET_FLAG_LIST)
2172 silc_server_channel_key(server, sock, packet);
2178 case SILC_PACKET_COMMAND:
2180 * Recived command. Processes the command request and allocates the
2181 * command context and calls the command.
2183 if (packet->flags & SILC_PACKET_FLAG_LIST)
2185 silc_server_command_process(server, sock, packet);
2188 case SILC_PACKET_COMMAND_REPLY:
2190 * Received command reply packet. Received command reply to command. It
2191 * may be reply to command sent by us or reply to command sent by client
2192 * that we've routed further.
2194 if (packet->flags & SILC_PACKET_FLAG_LIST)
2196 silc_server_command_reply(server, sock, packet);
2200 * Private Message packets
2202 case SILC_PACKET_PRIVATE_MESSAGE:
2204 * Received private message packet. The packet is coming from either
2207 if (packet->flags & SILC_PACKET_FLAG_LIST)
2209 idata->last_receive = time(NULL);
2210 silc_server_private_message(server, sock, packet);
2213 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2215 * Private message key packet.
2217 if (packet->flags & SILC_PACKET_FLAG_LIST)
2219 silc_server_private_message_key(server, sock, packet);
2223 * Key Exchange protocol packets
2225 case SILC_PACKET_KEY_EXCHANGE:
2226 if (packet->flags & SILC_PACKET_FLAG_LIST)
2229 if (sock->protocol && sock->protocol->protocol &&
2230 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2231 SilcServerKEInternalContext *proto_ctx =
2232 (SilcServerKEInternalContext *)sock->protocol->context;
2234 proto_ctx->packet = silc_packet_context_dup(packet);
2236 /* Let the protocol handle the packet */
2237 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2239 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2240 "protocol active, packet dropped."));
2244 case SILC_PACKET_KEY_EXCHANGE_1:
2245 if (packet->flags & SILC_PACKET_FLAG_LIST)
2248 if (sock->protocol && sock->protocol->protocol &&
2249 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2250 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2252 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2253 SilcServerRekeyInternalContext *proto_ctx =
2254 (SilcServerRekeyInternalContext *)sock->protocol->context;
2256 if (proto_ctx->packet)
2257 silc_packet_context_free(proto_ctx->packet);
2259 proto_ctx->packet = silc_packet_context_dup(packet);
2261 /* Let the protocol handle the packet */
2262 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2264 SilcServerKEInternalContext *proto_ctx =
2265 (SilcServerKEInternalContext *)sock->protocol->context;
2267 if (proto_ctx->packet)
2268 silc_packet_context_free(proto_ctx->packet);
2270 proto_ctx->packet = silc_packet_context_dup(packet);
2271 proto_ctx->dest_id_type = packet->src_id_type;
2272 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2273 packet->src_id_type);
2274 if (!proto_ctx->dest_id)
2277 /* Let the protocol handle the packet */
2278 silc_protocol_execute(sock->protocol, server->schedule,
2282 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2283 "protocol active, packet dropped."));
2287 case SILC_PACKET_KEY_EXCHANGE_2:
2288 if (packet->flags & SILC_PACKET_FLAG_LIST)
2291 if (sock->protocol && sock->protocol->protocol &&
2292 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2293 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2295 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2296 SilcServerRekeyInternalContext *proto_ctx =
2297 (SilcServerRekeyInternalContext *)sock->protocol->context;
2299 if (proto_ctx->packet)
2300 silc_packet_context_free(proto_ctx->packet);
2302 proto_ctx->packet = silc_packet_context_dup(packet);
2304 /* Let the protocol handle the packet */
2305 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2307 SilcServerKEInternalContext *proto_ctx =
2308 (SilcServerKEInternalContext *)sock->protocol->context;
2310 if (proto_ctx->packet)
2311 silc_packet_context_free(proto_ctx->packet);
2313 proto_ctx->packet = silc_packet_context_dup(packet);
2314 proto_ctx->dest_id_type = packet->src_id_type;
2315 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2316 packet->src_id_type);
2317 if (!proto_ctx->dest_id)
2320 /* Let the protocol handle the packet */
2321 silc_protocol_execute(sock->protocol, server->schedule,
2325 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2326 "protocol active, packet dropped."));
2330 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2332 * Connection authentication request packet. When we receive this packet
2333 * we will send to the other end information about our mandatory
2334 * authentication method for the connection. This packet maybe received
2337 if (packet->flags & SILC_PACKET_FLAG_LIST)
2339 silc_server_connection_auth_request(server, sock, packet);
2343 * Connection Authentication protocol packets
2345 case SILC_PACKET_CONNECTION_AUTH:
2346 /* Start of the authentication protocol. We receive here the
2347 authentication data and will verify it. */
2348 if (packet->flags & SILC_PACKET_FLAG_LIST)
2351 if (sock->protocol && sock->protocol->protocol->type
2352 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2354 SilcServerConnAuthInternalContext *proto_ctx =
2355 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2357 proto_ctx->packet = silc_packet_context_dup(packet);
2359 /* Let the protocol handle the packet */
2360 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2362 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2363 "protocol active, packet dropped."));
2367 case SILC_PACKET_NEW_ID:
2369 * Received New ID packet. This includes some new ID that has been
2370 * created. It may be for client, server or channel. This is the way
2371 * to distribute information about new registered entities in the
2374 if (packet->flags & SILC_PACKET_FLAG_LIST)
2375 silc_server_new_id_list(server, sock, packet);
2377 silc_server_new_id(server, sock, packet);
2380 case SILC_PACKET_NEW_CLIENT:
2382 * Received new client packet. This includes client information that
2383 * we will use to create initial client ID. After creating new
2384 * ID we will send it to the client.
2386 if (packet->flags & SILC_PACKET_FLAG_LIST)
2388 silc_server_new_client(server, sock, packet);
2391 case SILC_PACKET_NEW_SERVER:
2393 * Received new server packet. This includes Server ID and some other
2394 * information that we may save. This is received after server has
2397 if (packet->flags & SILC_PACKET_FLAG_LIST)
2399 silc_server_new_server(server, sock, packet);
2402 case SILC_PACKET_NEW_CHANNEL:
2404 * Received new channel packet. Information about new channel in the
2405 * network are distributed using this packet.
2407 if (packet->flags & SILC_PACKET_FLAG_LIST)
2408 silc_server_new_channel_list(server, sock, packet);
2410 silc_server_new_channel(server, sock, packet);
2413 case SILC_PACKET_HEARTBEAT:
2415 * Received heartbeat.
2417 if (packet->flags & SILC_PACKET_FLAG_LIST)
2421 case SILC_PACKET_KEY_AGREEMENT:
2423 * Received heartbeat.
2425 if (packet->flags & SILC_PACKET_FLAG_LIST)
2427 silc_server_key_agreement(server, sock, packet);
2430 case SILC_PACKET_REKEY:
2432 * Received re-key packet. The sender wants to regenerate the session
2435 if (packet->flags & SILC_PACKET_FLAG_LIST)
2437 silc_server_rekey(server, sock, packet);
2440 case SILC_PACKET_REKEY_DONE:
2442 * The re-key is done.
2444 if (packet->flags & SILC_PACKET_FLAG_LIST)
2447 if (sock->protocol && sock->protocol->protocol &&
2448 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2450 SilcServerRekeyInternalContext *proto_ctx =
2451 (SilcServerRekeyInternalContext *)sock->protocol->context;
2453 if (proto_ctx->packet)
2454 silc_packet_context_free(proto_ctx->packet);
2456 proto_ctx->packet = silc_packet_context_dup(packet);
2458 /* Let the protocol handle the packet */
2459 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2461 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2462 "protocol active, packet dropped."));
2466 case SILC_PACKET_FTP:
2468 if (packet->flags & SILC_PACKET_FLAG_LIST)
2470 silc_server_ftp(server, sock, packet);
2473 case SILC_PACKET_RESUME_CLIENT:
2475 if (packet->flags & SILC_PACKET_FLAG_LIST)
2477 silc_server_resume_client(server, sock, packet);
2480 case SILC_PACKET_RESUME_ROUTER:
2481 /* Resume router packet received. This packet is received for backup
2482 router resuming protocol. */
2483 if (packet->flags & SILC_PACKET_FLAG_LIST)
2485 silc_server_backup_resume_router(server, sock, packet);
2489 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2494 /* Creates connection to a remote router. */
2496 void silc_server_create_connection(SilcServer server,
2497 const char *remote_host, SilcUInt32 port)
2499 SilcServerConnection sconn;
2501 /* Allocate connection object for hold connection specific stuff. */
2502 sconn = silc_calloc(1, sizeof(*sconn));
2503 sconn->server = server;
2504 sconn->remote_host = strdup(remote_host);
2505 sconn->remote_port = port;
2506 sconn->no_reconnect = TRUE;
2508 silc_schedule_task_add(server->schedule, 0,
2509 silc_server_connect_router,
2510 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2511 SILC_TASK_PRI_NORMAL);
2514 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2516 silc_socket_free((SilcSocketConnection)context);
2519 /* Closes connection to socket connection */
2521 void silc_server_close_connection(SilcServer server,
2522 SilcSocketConnection sock)
2524 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2525 silc_socket_free(sock);
2529 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2531 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2532 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2533 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2536 /* We won't listen for this connection anymore */
2537 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2539 /* Unregister all tasks */
2540 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2542 /* Close the actual connection */
2543 silc_net_close_connection(sock->sock);
2544 server->sockets[sock->sock] = NULL;
2546 /* If sock->user_data is NULL then we'll check for active protocols
2547 here since the silc_server_free_sock_user_data has not been called
2548 for this connection. */
2549 if (!sock->user_data) {
2550 /* If any protocol is active cancel its execution. It will call
2551 the final callback which will finalize the disconnection. */
2552 if (sock->protocol) {
2553 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2554 silc_protocol_cancel(sock->protocol, server->schedule);
2555 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2556 silc_protocol_execute_final(sock->protocol, server->schedule);
2557 sock->protocol = NULL;
2562 silc_schedule_task_add(server->schedule, 0,
2563 silc_server_close_connection_final,
2564 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2565 SILC_TASK_PRI_NORMAL);
2568 /* Sends disconnect message to remote connection and disconnects the
2571 void silc_server_disconnect_remote(SilcServer server,
2572 SilcSocketConnection sock,
2573 SilcStatus status, ...)
2576 unsigned char buf[512];
2584 memset(buf, 0, sizeof(buf));
2585 va_start(ap, status);
2586 cp = va_arg(ap, char *);
2588 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2593 SILC_LOG_DEBUG(("Disconnecting remote host"));
2595 /* Notify remote end that the conversation is over. The notify message
2596 is tried to be sent immediately. */
2600 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2602 buffer = silc_buffer_alloc_size(len);
2606 buffer->data[0] = status;
2608 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2610 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2611 buffer->data, buffer->len, TRUE);
2612 silc_buffer_free(buffer);
2615 silc_server_packet_queue_purge(server, sock);
2617 /* Mark the connection to be disconnected */
2618 SILC_SET_DISCONNECTED(sock);
2619 silc_server_close_connection(server, sock);
2624 SilcClientEntry client;
2625 } *FreeClientInternal;
2627 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2629 FreeClientInternal i = (FreeClientInternal)context;
2631 silc_idlist_del_data(i->client);
2632 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2636 /* Frees client data and notifies about client's signoff. */
2638 void silc_server_free_client_data(SilcServer server,
2639 SilcSocketConnection sock,
2640 SilcClientEntry client,
2642 const char *signoff)
2644 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2646 SILC_LOG_DEBUG(("Freeing client data"));
2649 if (!client->router && !client->connection &&
2650 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2651 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2652 SILC_LOG_ERROR(("****** Contact Pekka"));
2653 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2658 /* If there is pending outgoing data for the client then purge it
2659 to the network before removing the client entry. */
2660 silc_server_packet_queue_purge(server, sock);
2663 /* Check if anyone is watching this nickname */
2664 if (server->server_type == SILC_ROUTER)
2665 silc_server_check_watcher_list(server, client, NULL,
2666 SILC_NOTIFY_TYPE_SIGNOFF);
2668 /* Send SIGNOFF notify to routers. */
2670 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2671 SILC_BROADCAST(server), client->id,
2675 /* Remove client from all channels */
2677 silc_server_remove_from_channels(server, NULL, client,
2678 TRUE, (char *)signoff, TRUE);
2680 silc_server_remove_from_channels(server, NULL, client,
2681 FALSE, NULL, FALSE);
2683 /* Remove this client from watcher list if it is */
2684 silc_server_del_from_watcher_list(server, client);
2686 /* Update statistics */
2687 server->stat.my_clients--;
2688 server->stat.clients--;
2689 if (server->stat.cell_clients)
2690 server->stat.cell_clients--;
2691 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2692 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2693 silc_schedule_task_del_by_context(server->schedule, client);
2695 /* We will not delete the client entry right away. We will take it
2696 into history (for WHOWAS command) for 5 minutes */
2699 silc_schedule_task_add(server->schedule, 0,
2700 silc_server_free_client_data_timeout,
2702 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2703 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2705 client->router = NULL;
2706 client->connection = NULL;
2709 /* Frees user_data pointer from socket connection object. This also sends
2710 appropriate notify packets to the network to inform about leaving
2713 void silc_server_free_sock_user_data(SilcServer server,
2714 SilcSocketConnection sock,
2715 const char *signoff_message)
2717 switch (sock->type) {
2718 case SILC_SOCKET_TYPE_CLIENT:
2720 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2721 silc_server_free_client_data(server, sock, user_data, TRUE,
2725 case SILC_SOCKET_TYPE_SERVER:
2726 case SILC_SOCKET_TYPE_ROUTER:
2728 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2729 SilcServerEntry backup_router = NULL;
2731 SILC_LOG_DEBUG(("Freeing server data"));
2734 backup_router = silc_server_backup_get(server, user_data->id);
2736 /* If this was our primary router connection then we're lost to
2737 the outside world. */
2738 if (server->router == user_data) {
2739 /* Check whether we have a backup router connection */
2740 if (!backup_router || backup_router == user_data) {
2741 silc_schedule_task_add(server->schedule, 0,
2742 silc_server_connect_to_router,
2745 SILC_TASK_PRI_NORMAL);
2747 server->id_entry->router = NULL;
2748 server->router = NULL;
2749 server->standalone = TRUE;
2750 backup_router = NULL;
2752 SILC_LOG_INFO(("New primary router is backup router %s",
2753 backup_router->server_name));
2754 SILC_LOG_DEBUG(("New primary router is backup router %s",
2755 backup_router->server_name));
2756 #ifdef BACKUP_SINGLE_ROUTER
2757 if (server->id_entry != backup_router) {
2758 #endif /* BACKUP_SINGLE_ROUTER */
2759 server->id_entry->router = backup_router;
2760 server->router = backup_router;
2761 server->router_connect = time(0);
2762 server->backup_primary = TRUE;
2763 #ifdef BACKUP_SINGLE_ROUTER
2765 server->id_entry->router = NULL;
2766 server->router = NULL;
2767 server->standalone = TRUE;
2769 #endif /* BACKUP_SINGLE_ROUTER */
2771 if (server->server_type == SILC_BACKUP_ROUTER) {
2772 server->server_type = SILC_ROUTER;
2774 /* We'll need to constantly try to reconnect to the primary
2775 router so that we'll see when it comes back online. */
2776 silc_server_backup_reconnect(server, sock->ip, sock->port,
2777 silc_server_backup_connected,
2781 /* Mark this connection as replaced */
2782 silc_server_backup_replaced_add(server, user_data->id,
2785 } else if (backup_router) {
2786 SILC_LOG_INFO(("Enabling the use of backup router %s",
2787 backup_router->server_name));
2788 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2789 backup_router->server_name));
2791 /* Mark this connection as replaced */
2792 silc_server_backup_replaced_add(server, user_data->id,
2796 if (!backup_router) {
2797 /* Free all client entries that this server owns as they will
2798 become invalid now as well. */
2800 silc_server_remove_clients_by_server(server, user_data, TRUE);
2801 if (server->server_type == SILC_SERVER)
2802 silc_server_remove_channels_by_server(server, user_data);
2804 /* Update the client entries of this server to the new backup
2805 router. This also removes the clients that *really* was owned
2806 by the primary router and went down with the router. */
2807 silc_server_update_clients_by_server(server, user_data, backup_router,
2809 silc_server_update_servers_by_server(server, user_data, backup_router);
2810 if (server->server_type == SILC_SERVER)
2811 silc_server_update_channels_by_server(server, user_data,
2815 /* Free the server entry */
2816 silc_server_backup_del(server, user_data);
2817 silc_server_backup_replaced_del(server, user_data);
2818 silc_idlist_del_data(user_data);
2819 if (!silc_idlist_del_server(server->local_list, user_data))
2820 silc_idlist_del_server(server->global_list, user_data);
2821 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
2822 server->stat.my_servers--;
2824 server->stat.my_routers--;
2825 server->stat.routers--;
2827 server->stat.servers--;
2828 if (server->server_type == SILC_ROUTER)
2829 server->stat.cell_servers--;
2831 if (backup_router) {
2832 /* Announce all of our stuff that was created about 5 minutes ago.
2833 The backup router knows all the other stuff already. */
2834 if (server->server_type == SILC_ROUTER)
2835 silc_server_announce_servers(server, FALSE, time(0) - 300,
2836 backup_router->connection);
2838 /* Announce our clients and channels to the router */
2839 silc_server_announce_clients(server, time(0) - 300,
2840 backup_router->connection);
2841 silc_server_announce_channels(server, time(0) - 300,
2842 backup_router->connection);
2848 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2850 SILC_LOG_DEBUG(("Freeing unknown connection data"));
2852 silc_idlist_del_data(user_data);
2853 silc_free(user_data);
2858 /* If any protocol is active cancel its execution */
2859 if (sock->protocol) {
2860 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2861 silc_protocol_cancel(sock->protocol, server->schedule);
2862 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2863 silc_protocol_execute_final(sock->protocol, server->schedule);
2864 sock->protocol = NULL;
2867 sock->user_data = NULL;
2870 /* Removes client from all channels it has joined. This is used when client
2871 connection is disconnected. If the client on a channel is last, the
2872 channel is removed as well. This sends the SIGNOFF notify types. */
2874 void silc_server_remove_from_channels(SilcServer server,
2875 SilcSocketConnection sock,
2876 SilcClientEntry client,
2878 const char *signoff_message,
2881 SilcChannelEntry channel;
2882 SilcChannelClientEntry chl;
2883 SilcHashTableList htl;
2884 SilcBuffer clidp = NULL;
2889 SILC_LOG_DEBUG(("Removing client from joined channels"));
2891 if (notify && !client->id)
2895 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2900 /* Remove the client from all channels. The client is removed from
2901 the channels' user list. */
2902 silc_hash_table_list(client->channels, &htl);
2903 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2904 channel = chl->channel;
2906 /* Remove channel if this is last client leaving the channel, unless
2907 the channel is permanent. */
2908 if (server->server_type == SILC_ROUTER &&
2909 silc_hash_table_count(channel->user_list) < 2) {
2910 silc_server_channel_delete(server, channel);
2914 silc_hash_table_del(client->channels, channel);
2915 silc_hash_table_del(channel->user_list, chl->client);
2916 channel->user_count--;
2918 /* If there is no global users on the channel anymore mark the channel
2919 as local channel. Do not check if the removed client is local client. */
2920 if (server->server_type != SILC_ROUTER && channel->global_users &&
2921 chl->client->router && !silc_server_channel_has_global(channel))
2922 channel->global_users = FALSE;
2926 /* Update statistics */
2927 if (client->connection)
2928 server->stat.my_chanclients--;
2929 if (server->server_type == SILC_ROUTER) {
2930 server->stat.cell_chanclients--;
2931 server->stat.chanclients--;
2934 /* If there is not at least one local user on the channel then we don't
2935 need the channel entry anymore, we can remove it safely, unless the
2936 channel is permanent channel */
2937 if (server->server_type != SILC_ROUTER &&
2938 !silc_server_channel_has_local(channel)) {
2939 /* Notify about leaving client if this channel has global users. */
2940 if (notify && channel->global_users)
2941 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2942 SILC_NOTIFY_TYPE_SIGNOFF,
2943 signoff_message ? 2 : 1,
2944 clidp->data, clidp->len,
2945 signoff_message, signoff_message ?
2946 strlen(signoff_message) : 0);
2948 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2949 silc_server_channel_delete(server, channel);
2953 /* Send notify to channel about client leaving SILC and channel too */
2955 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2956 SILC_NOTIFY_TYPE_SIGNOFF,
2957 signoff_message ? 2 : 1,
2958 clidp->data, clidp->len,
2959 signoff_message, signoff_message ?
2960 strlen(signoff_message) : 0);
2962 /* Re-generate channel key if needed */
2963 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2964 if (!silc_server_create_channel_key(server, channel, 0))
2967 /* Send the channel key to the channel. The key of course is not sent
2968 to the client who was removed from the channel. */
2969 silc_server_send_channel_key(server, client->connection, channel,
2970 server->server_type == SILC_ROUTER ?
2971 FALSE : !server->standalone);
2975 silc_hash_table_list_reset(&htl);
2977 silc_buffer_free(clidp);
2980 /* Removes client from one channel. This is used for example when client
2981 calls LEAVE command to remove itself from the channel. Returns TRUE
2982 if channel still exists and FALSE if the channel is removed when
2983 last client leaves the channel. If `notify' is FALSE notify messages
2986 bool silc_server_remove_from_one_channel(SilcServer server,
2987 SilcSocketConnection sock,
2988 SilcChannelEntry channel,
2989 SilcClientEntry client,
2992 SilcChannelClientEntry chl;
2995 SILC_LOG_DEBUG(("Removing %s from channel %s",
2996 silc_id_render(client->id, SILC_ID_CLIENT),
2997 channel->channel_name));
2999 /* Get the entry to the channel, if this client is not on the channel
3001 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3004 /* Remove channel if this is last client leaving the channel, unless
3005 the channel is permanent. */
3006 if (server->server_type == SILC_ROUTER &&
3007 silc_hash_table_count(channel->user_list) < 2) {
3008 silc_server_channel_delete(server, channel);
3012 silc_hash_table_del(client->channels, chl->channel);
3013 silc_hash_table_del(channel->user_list, chl->client);
3014 channel->user_count--;
3016 /* If there is no global users on the channel anymore mark the channel
3017 as local channel. Do not check if the client is local client. */
3018 if (server->server_type != SILC_ROUTER && channel->global_users &&
3019 chl->client->router && !silc_server_channel_has_global(channel))
3020 channel->global_users = FALSE;
3024 /* Update statistics */
3025 if (client->connection)
3026 server->stat.my_chanclients--;
3027 if (server->server_type == SILC_ROUTER) {
3028 server->stat.cell_chanclients--;
3029 server->stat.chanclients--;
3032 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3036 /* If there is not at least one local user on the channel then we don't
3037 need the channel entry anymore, we can remove it safely, unless the
3038 channel is permanent channel */
3039 if (server->server_type != SILC_ROUTER &&
3040 !silc_server_channel_has_local(channel)) {
3041 /* Notify about leaving client if this channel has global users. */
3042 if (notify && channel->global_users)
3043 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3044 SILC_NOTIFY_TYPE_LEAVE, 1,
3045 clidp->data, clidp->len);
3047 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3048 silc_server_channel_delete(server, channel);
3049 silc_buffer_free(clidp);
3053 /* Send notify to channel about client leaving the channel */
3055 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3056 SILC_NOTIFY_TYPE_LEAVE, 1,
3057 clidp->data, clidp->len);
3059 silc_buffer_free(clidp);
3063 /* Timeout callback. This is called if connection is idle or for some
3064 other reason is not responding within some period of time. This
3065 disconnects the remote end. */
3067 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3069 SilcServer server = (SilcServer)context;
3070 SilcSocketConnection sock = server->sockets[fd];
3071 SilcProtocolType protocol = 0;
3073 SILC_LOG_DEBUG(("Start"));
3078 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3079 sock->hostname, sock->ip));
3081 /* If we have protocol active we must assure that we call the protocol's
3082 final callback so that all the memory is freed. */
3083 if (sock->protocol) {
3084 protocol = sock->protocol->protocol->type;
3085 silc_protocol_cancel(sock->protocol, server->schedule);
3086 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3087 silc_protocol_execute_final(sock->protocol, server->schedule);
3088 sock->protocol = NULL;
3092 if (sock->user_data)
3093 silc_server_free_sock_user_data(server, sock, NULL);
3095 silc_server_disconnect_remote(server, sock,
3097 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3098 SILC_STATUS_ERR_AUTH_FAILED :
3099 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3100 "Connection timeout");
3103 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3104 function may be used only by router. In real SILC network all channels
3105 are created by routers thus this function is never used by normal
3108 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3109 SilcServerID *router_id,
3115 SilcChannelID *channel_id;
3116 SilcChannelEntry entry;
3120 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3123 cipher = SILC_DEFAULT_CIPHER;
3125 hmac = SILC_DEFAULT_HMAC;
3127 /* Allocate cipher */
3128 if (!silc_cipher_alloc(cipher, &key))
3132 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3133 silc_cipher_free(key);
3137 channel_name = strdup(channel_name);
3139 /* Create the channel ID */
3140 if (!silc_id_create_channel_id(server, router_id, server->rng,
3142 silc_free(channel_name);
3143 silc_cipher_free(key);
3144 silc_hmac_free(newhmac);
3148 /* Create the channel */
3149 entry = silc_idlist_add_channel(server->local_list, channel_name,
3150 SILC_CHANNEL_MODE_NONE, channel_id,
3151 NULL, key, newhmac, 0);
3153 silc_free(channel_name);
3154 silc_cipher_free(key);
3155 silc_hmac_free(newhmac);
3156 silc_free(channel_id);
3160 entry->cipher = strdup(cipher);
3161 entry->hmac_name = strdup(hmac);
3163 /* Now create the actual key material */
3164 if (!silc_server_create_channel_key(server, entry,
3165 silc_cipher_get_key_len(key) / 8)) {
3166 silc_idlist_del_channel(server->local_list, entry);
3170 /* Notify other routers about the new channel. We send the packet
3171 to our primary route. */
3173 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3174 channel_name, entry->id,
3175 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3178 /* Distribute to backup routers */
3179 if (broadcast && server->server_type == SILC_ROUTER) {
3182 SilcUInt32 name_len = strlen(channel_name);
3183 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3184 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3186 packet = silc_channel_payload_encode(channel_name, name_len,
3187 cid, channel_id_len, entry->mode);
3188 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3189 packet->data, packet->len, FALSE, TRUE);
3191 silc_buffer_free(packet);
3194 server->stat.my_channels++;
3195 if (server->server_type == SILC_ROUTER) {
3196 server->stat.channels++;
3197 server->stat.cell_channels++;
3198 entry->users_resolved = TRUE;
3204 /* Same as above but creates the channel with Channel ID `channel_id. */
3207 silc_server_create_new_channel_with_id(SilcServer server,
3211 SilcChannelID *channel_id,
3214 SilcChannelEntry entry;
3218 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3221 cipher = SILC_DEFAULT_CIPHER;
3223 hmac = SILC_DEFAULT_HMAC;
3225 /* Allocate cipher */
3226 if (!silc_cipher_alloc(cipher, &key))
3230 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3231 silc_cipher_free(key);
3235 channel_name = strdup(channel_name);
3237 /* Create the channel */
3238 entry = silc_idlist_add_channel(server->local_list, channel_name,
3239 SILC_CHANNEL_MODE_NONE, channel_id,
3240 NULL, key, newhmac, 0);
3242 silc_cipher_free(key);
3243 silc_hmac_free(newhmac);
3244 silc_free(channel_name);
3248 /* Now create the actual key material */
3249 if (!silc_server_create_channel_key(server, entry,
3250 silc_cipher_get_key_len(key) / 8)) {
3251 silc_idlist_del_channel(server->local_list, entry);
3255 /* Notify other routers about the new channel. We send the packet
3256 to our primary route. */
3258 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3259 channel_name, entry->id,
3260 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3263 /* Distribute to backup routers */
3264 if (broadcast && server->server_type == SILC_ROUTER) {
3267 SilcUInt32 name_len = strlen(channel_name);
3268 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3269 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3271 packet = silc_channel_payload_encode(channel_name, name_len,
3272 cid, channel_id_len, entry->mode);
3273 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3274 packet->data, packet->len, FALSE, TRUE);
3276 silc_buffer_free(packet);
3279 server->stat.my_channels++;
3280 if (server->server_type == SILC_ROUTER) {
3281 server->stat.channels++;
3282 server->stat.cell_channels++;
3283 entry->users_resolved = TRUE;
3289 /* Channel's key re-key timeout callback. */
3291 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3293 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3294 SilcServer server = (SilcServer)rekey->context;
3298 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3301 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3304 /* Generates new channel key. This is used to create the initial channel key
3305 but also to re-generate new key for channel. If `key_len' is provided
3306 it is the bytes of the key length. */
3308 bool silc_server_create_channel_key(SilcServer server,
3309 SilcChannelEntry channel,
3313 unsigned char channel_key[32], hash[32];
3316 SILC_LOG_DEBUG(("Generating channel key"));
3318 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3319 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3323 if (!channel->channel_key)
3324 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3325 channel->channel_key = NULL;
3331 else if (channel->key_len)
3332 len = channel->key_len / 8;
3334 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3336 /* Create channel key */
3337 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3340 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3342 /* Remove old key if exists */
3344 memset(channel->key, 0, channel->key_len / 8);
3345 silc_free(channel->key);
3349 channel->key_len = len * 8;
3350 channel->key = silc_memdup(channel_key, len);
3351 memset(channel_key, 0, sizeof(channel_key));
3353 /* Generate HMAC key from the channel key data and set it */
3355 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3356 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3357 silc_hmac_set_key(channel->hmac, hash,
3358 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3359 memset(hash, 0, sizeof(hash));
3361 if (server->server_type == SILC_ROUTER) {
3362 if (!channel->rekey)
3363 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3364 channel->rekey->context = (void *)server;
3365 channel->rekey->channel = channel;
3366 channel->rekey->key_len = key_len;
3367 if (channel->rekey->task)
3368 silc_schedule_task_del(server->schedule, channel->rekey->task);
3370 channel->rekey->task =
3371 silc_schedule_task_add(server->schedule, 0,
3372 silc_server_channel_key_rekey,
3373 (void *)channel->rekey,
3374 server->config->channel_rekey_secs, 0,
3376 SILC_TASK_PRI_NORMAL);
3382 /* Saves the channel key found in the encoded `key_payload' buffer. This
3383 function is used when we receive Channel Key Payload and also when we're
3384 processing JOIN command reply. Returns entry to the channel. */
3386 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3387 SilcBuffer key_payload,
3388 SilcChannelEntry channel)
3390 SilcChannelKeyPayload payload = NULL;
3391 SilcChannelID *id = NULL;
3392 unsigned char *tmp, hash[32];
3396 SILC_LOG_DEBUG(("Saving new channel key"));
3398 /* Decode channel key payload */
3399 payload = silc_channel_key_payload_parse(key_payload->data,
3402 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3407 /* Get the channel entry */
3410 /* Get channel ID */
3411 tmp = silc_channel_key_get_id(payload, &tmp_len);
3412 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3418 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3420 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3422 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3423 silc_id_render(id, SILC_ID_CHANNEL)));
3429 tmp = silc_channel_key_get_key(payload, &tmp_len);
3435 cipher = silc_channel_key_get_cipher(payload, NULL);
3441 /* Remove old key if exists */
3443 memset(channel->key, 0, channel->key_len / 8);
3444 silc_free(channel->key);
3445 silc_cipher_free(channel->channel_key);
3448 /* Create new cipher */
3449 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3450 channel->channel_key = NULL;
3455 if (channel->cipher)
3456 silc_free(channel->cipher);
3457 channel->cipher = strdup(cipher);
3460 channel->key_len = tmp_len * 8;
3461 channel->key = silc_memdup(tmp, tmp_len);
3462 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3464 /* Generate HMAC key from the channel key data and set it */
3466 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3467 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3468 silc_hmac_set_key(channel->hmac, hash,
3469 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3471 memset(hash, 0, sizeof(hash));
3472 memset(tmp, 0, tmp_len);
3474 if (server->server_type == SILC_ROUTER) {
3475 if (!channel->rekey)
3476 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3477 channel->rekey->context = (void *)server;
3478 channel->rekey->channel = channel;
3479 if (channel->rekey->task)
3480 silc_schedule_task_del(server->schedule, channel->rekey->task);
3482 channel->rekey->task =
3483 silc_schedule_task_add(server->schedule, 0,
3484 silc_server_channel_key_rekey,
3485 (void *)channel->rekey,
3486 server->config->channel_rekey_secs, 0,
3488 SILC_TASK_PRI_NORMAL);
3494 silc_channel_key_payload_free(payload);
3499 /* Heartbeat callback. This function is set as argument for the
3500 silc_socket_set_heartbeat function. The library will call this function
3501 at the set time interval. */
3503 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3506 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3508 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3510 /* Send the heartbeat */
3511 silc_server_send_heartbeat(hb->server, sock);
3514 /* Returns assembled of all servers in the given ID list. The packet's
3515 form is dictated by the New ID payload. */
3517 static void silc_server_announce_get_servers(SilcServer server,
3518 SilcServerEntry remote,
3520 SilcBuffer *servers,
3521 unsigned long creation_time)
3523 SilcIDCacheList list;
3524 SilcIDCacheEntry id_cache;
3525 SilcServerEntry entry;
3528 /* Go through all clients in the list */
3529 if (silc_idcache_get_all(id_list->servers, &list)) {
3530 if (silc_idcache_list_first(list, &id_cache)) {
3532 entry = (SilcServerEntry)id_cache->context;
3534 /* Do not announce the one we've sending our announcements and
3535 do not announce ourself. Also check the creation time if it's
3537 if ((entry == remote) || (entry == server->id_entry) ||
3538 (creation_time && entry->data.created < creation_time)) {
3539 if (!silc_idcache_list_next(list, &id_cache))
3544 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3546 *servers = silc_buffer_realloc(*servers,
3548 (*servers)->truelen + idp->len :
3550 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3551 silc_buffer_put(*servers, idp->data, idp->len);
3552 silc_buffer_pull(*servers, idp->len);
3553 silc_buffer_free(idp);
3555 if (!silc_idcache_list_next(list, &id_cache))
3560 silc_idcache_list_free(list);
3565 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3571 p = silc_notify_payload_encode(notify, argc, ap);
3577 /* This function is used by router to announce existing servers to our
3578 primary router when we've connected to it. If `creation_time' is non-zero
3579 then only the servers that has been created after the `creation_time'
3580 will be announced. */
3582 void silc_server_announce_servers(SilcServer server, bool global,
3583 unsigned long creation_time,
3584 SilcSocketConnection remote)
3586 SilcBuffer servers = NULL;
3588 SILC_LOG_DEBUG(("Announcing servers"));
3590 /* Get servers in local list */
3591 silc_server_announce_get_servers(server, remote->user_data,
3592 server->local_list, &servers,
3596 /* Get servers in global list */
3597 silc_server_announce_get_servers(server, remote->user_data,
3598 server->global_list, &servers,
3602 silc_buffer_push(servers, servers->data - servers->head);
3603 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3605 /* Send the packet */
3606 silc_server_packet_send(server, remote,
3607 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3608 servers->data, servers->len, TRUE);
3610 silc_buffer_free(servers);
3614 /* Returns assembled packet of all clients in the given ID list. The
3615 packet's form is dictated by the New ID Payload. */
3617 static void silc_server_announce_get_clients(SilcServer server,
3619 SilcBuffer *clients,
3621 unsigned long creation_time)
3623 SilcIDCacheList list;
3624 SilcIDCacheEntry id_cache;
3625 SilcClientEntry client;
3628 unsigned char mode[4];
3630 /* Go through all clients in the list */
3631 if (silc_idcache_get_all(id_list->clients, &list)) {
3632 if (silc_idcache_list_first(list, &id_cache)) {
3634 client = (SilcClientEntry)id_cache->context;
3636 if (creation_time && client->data.created < creation_time) {
3637 if (!silc_idcache_list_next(list, &id_cache))
3642 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3644 *clients = silc_buffer_realloc(*clients,
3646 (*clients)->truelen + idp->len :
3648 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3649 silc_buffer_put(*clients, idp->data, idp->len);
3650 silc_buffer_pull(*clients, idp->len);
3652 SILC_PUT32_MSB(client->mode, mode);
3653 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3654 2, idp->data, idp->len,
3656 *umodes = silc_buffer_realloc(*umodes,
3658 (*umodes)->truelen + tmp->len :
3660 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3661 silc_buffer_put(*umodes, tmp->data, tmp->len);
3662 silc_buffer_pull(*umodes, tmp->len);
3663 silc_buffer_free(tmp);
3665 silc_buffer_free(idp);
3667 if (!silc_idcache_list_next(list, &id_cache))
3672 silc_idcache_list_free(list);
3676 /* This function is used to announce our existing clients to our router
3677 when we've connected to it. If `creation_time' is non-zero then only
3678 the clients that has been created after the `creation_time' will be
3681 void silc_server_announce_clients(SilcServer server,
3682 unsigned long creation_time,
3683 SilcSocketConnection remote)
3685 SilcBuffer clients = NULL;
3686 SilcBuffer umodes = NULL;
3688 SILC_LOG_DEBUG(("Announcing clients"));
3690 /* Get clients in local list */
3691 silc_server_announce_get_clients(server, server->local_list,
3692 &clients, &umodes, creation_time);
3694 /* As router we announce our global list as well */
3695 if (server->server_type == SILC_ROUTER)
3696 silc_server_announce_get_clients(server, server->global_list,
3697 &clients, &umodes, creation_time);
3700 silc_buffer_push(clients, clients->data - clients->head);
3701 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3703 /* Send the packet */
3704 silc_server_packet_send(server, remote,
3705 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3706 clients->data, clients->len, TRUE);
3708 silc_buffer_free(clients);
3712 silc_buffer_push(umodes, umodes->data - umodes->head);
3713 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3715 /* Send the packet */
3716 silc_server_packet_send(server, remote,
3717 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3718 umodes->data, umodes->len, TRUE);
3720 silc_buffer_free(umodes);
3724 /* Returns channel's topic for announcing it */
3726 void silc_server_announce_get_channel_topic(SilcServer server,
3727 SilcChannelEntry channel,
3732 if (channel->topic) {
3733 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3734 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3735 chidp->data, chidp->len,
3737 strlen(channel->topic));
3738 silc_buffer_free(chidp);
3742 /* Returns assembled packets for channel users of the `channel'. */
3744 void silc_server_announce_get_channel_users(SilcServer server,
3745 SilcChannelEntry channel,
3746 SilcBuffer *channel_modes,
3747 SilcBuffer *channel_users,
3748 SilcBuffer *channel_users_modes)
3750 SilcChannelClientEntry chl;
3751 SilcHashTableList htl;
3752 SilcBuffer chidp, clidp, csidp;
3755 unsigned char mode[4], *fkey = NULL;
3756 SilcUInt32 fkey_len = 0;
3759 SILC_LOG_DEBUG(("Start"));
3761 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3762 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
3765 SILC_PUT32_MSB(channel->mode, mode);
3766 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
3767 if (channel->founder_key)
3768 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3770 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
3771 6, csidp->data, csidp->len,
3774 hmac, hmac ? strlen(hmac) : 0,
3775 channel->passphrase,
3776 channel->passphrase ?
3777 strlen(channel->passphrase) : 0,
3781 silc_buffer_realloc(*channel_modes,
3783 (*channel_modes)->truelen + len : len));
3784 silc_buffer_pull_tail(*channel_modes,
3785 ((*channel_modes)->end -
3786 (*channel_modes)->data));
3787 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
3788 silc_buffer_pull(*channel_modes, len);
3789 silc_buffer_free(tmp);
3794 /* Now find all users on the channel */
3795 silc_hash_table_list(channel->user_list, &htl);
3796 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3797 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3800 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3801 clidp->data, clidp->len,
3802 chidp->data, chidp->len);
3805 silc_buffer_realloc(*channel_users,
3807 (*channel_users)->truelen + len : len));
3808 silc_buffer_pull_tail(*channel_users,
3809 ((*channel_users)->end -
3810 (*channel_users)->data));
3812 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3813 silc_buffer_pull(*channel_users, len);
3814 silc_buffer_free(tmp);
3816 /* CUMODE notify for mode change on the channel */
3817 SILC_PUT32_MSB(chl->mode, mode);
3818 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
3819 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
3820 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3821 4, csidp->data, csidp->len,
3823 clidp->data, clidp->len,
3826 *channel_users_modes =
3827 silc_buffer_realloc(*channel_users_modes,
3828 (*channel_users_modes ?
3829 (*channel_users_modes)->truelen + len : len));
3830 silc_buffer_pull_tail(*channel_users_modes,
3831 ((*channel_users_modes)->end -
3832 (*channel_users_modes)->data));
3834 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3835 silc_buffer_pull(*channel_users_modes, len);
3836 silc_buffer_free(tmp);
3840 silc_buffer_free(clidp);
3842 silc_hash_table_list_reset(&htl);
3843 silc_buffer_free(chidp);
3844 silc_buffer_free(csidp);
3847 /* Returns assembled packets for all channels and users on those channels
3848 from the given ID List. The packets are in the form dictated by the
3849 New Channel and New Channel User payloads. */
3851 void silc_server_announce_get_channels(SilcServer server,
3853 SilcBuffer *channels,
3854 SilcBuffer **channel_modes,
3855 SilcBuffer *channel_users,
3856 SilcBuffer **channel_users_modes,
3857 SilcUInt32 *channel_users_modes_c,
3858 SilcBuffer **channel_topics,
3859 SilcChannelID ***channel_ids,
3860 unsigned long creation_time)
3862 SilcIDCacheList list;
3863 SilcIDCacheEntry id_cache;
3864 SilcChannelEntry channel;
3867 SilcUInt16 name_len;
3869 int i = *channel_users_modes_c;
3872 SILC_LOG_DEBUG(("Start"));
3874 /* Go through all channels in the list */
3875 if (silc_idcache_get_all(id_list->channels, &list)) {
3876 if (silc_idcache_list_first(list, &id_cache)) {
3878 channel = (SilcChannelEntry)id_cache->context;
3880 if (creation_time && channel->created < creation_time)
3885 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3886 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3887 name_len = strlen(channel->channel_name);
3890 len = 4 + name_len + id_len + 4;
3892 silc_buffer_realloc(*channels,
3893 (*channels ? (*channels)->truelen +
3895 silc_buffer_pull_tail(*channels,
3896 ((*channels)->end - (*channels)->data));
3897 silc_buffer_format(*channels,
3898 SILC_STR_UI_SHORT(name_len),
3899 SILC_STR_UI_XNSTRING(channel->channel_name,
3901 SILC_STR_UI_SHORT(id_len),
3902 SILC_STR_UI_XNSTRING(cid, id_len),
3903 SILC_STR_UI_INT(channel->mode),
3905 silc_buffer_pull(*channels, len);
3908 /* Channel user modes */
3909 *channel_users_modes = silc_realloc(*channel_users_modes,
3910 sizeof(**channel_users_modes) *
3912 (*channel_users_modes)[i] = NULL;
3913 *channel_modes = silc_realloc(*channel_modes,
3914 sizeof(**channel_modes) * (i + 1));
3915 (*channel_modes)[i] = NULL;
3916 *channel_ids = silc_realloc(*channel_ids,
3917 sizeof(**channel_ids) * (i + 1));
3918 (*channel_ids)[i] = NULL;
3919 silc_server_announce_get_channel_users(server, channel,
3920 &(*channel_modes)[i],
3922 &(*channel_users_modes)[i]);
3923 (*channel_ids)[i] = channel->id;
3925 /* Channel's topic */
3926 *channel_topics = silc_realloc(*channel_topics,
3927 sizeof(**channel_topics) * (i + 1));
3928 (*channel_topics)[i] = NULL;
3929 silc_server_announce_get_channel_topic(server, channel,
3930 &(*channel_topics)[i]);
3933 if (!silc_idcache_list_next(list, &id_cache))
3937 *channel_users_modes_c += i;
3940 silc_idcache_list_free(list);
3944 /* This function is used to announce our existing channels to our router
3945 when we've connected to it. This also announces the users on the
3946 channels to the router. If the `creation_time' is non-zero only the
3947 channels that was created after the `creation_time' are announced.
3948 Note that the channel users are still announced even if the `creation_time'
3951 void silc_server_announce_channels(SilcServer server,
3952 unsigned long creation_time,
3953 SilcSocketConnection remote)
3955 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
3956 SilcBuffer *channel_users_modes = NULL;
3957 SilcBuffer *channel_topics = NULL;
3958 SilcUInt32 channel_users_modes_c = 0;
3959 SilcChannelID **channel_ids = NULL;
3961 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3963 /* Get channels and channel users in local list */
3964 silc_server_announce_get_channels(server, server->local_list,
3965 &channels, &channel_modes,
3967 &channel_users_modes,
3968 &channel_users_modes_c,
3970 &channel_ids, creation_time);
3972 /* Get channels and channel users in global list */
3973 if (server->server_type != SILC_SERVER)
3974 silc_server_announce_get_channels(server, server->global_list,
3975 &channels, &channel_modes,
3977 &channel_users_modes,
3978 &channel_users_modes_c,
3980 &channel_ids, creation_time);
3983 silc_buffer_push(channels, channels->data - channels->head);
3984 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3986 /* Send the packet */
3987 silc_server_packet_send(server, remote,
3988 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3989 channels->data, channels->len,
3992 silc_buffer_free(channels);
3995 if (channel_modes) {
3998 for (i = 0; i < channel_users_modes_c; i++) {
3999 if (!channel_modes[i])
4001 silc_buffer_push(channel_modes[i],
4002 channel_modes[i]->data -
4003 channel_modes[i]->head);
4004 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4005 channel_modes[i]->len);
4006 silc_server_packet_send_dest(server, remote,
4007 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4008 channel_ids[i], SILC_ID_CHANNEL,
4009 channel_modes[i]->data,
4010 channel_modes[i]->len,
4012 silc_buffer_free(channel_modes[i]);
4014 silc_free(channel_modes);
4017 if (channel_users) {
4018 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4019 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4020 channel_users->len);
4022 /* Send the packet */
4023 silc_server_packet_send(server, remote,
4024 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4025 channel_users->data, channel_users->len,
4028 silc_buffer_free(channel_users);
4031 if (channel_users_modes) {
4034 for (i = 0; i < channel_users_modes_c; i++) {
4035 if (!channel_users_modes[i])
4037 silc_buffer_push(channel_users_modes[i],
4038 channel_users_modes[i]->data -
4039 channel_users_modes[i]->head);
4040 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4041 channel_users_modes[i]->len);
4042 silc_server_packet_send_dest(server, remote,
4043 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4044 channel_ids[i], SILC_ID_CHANNEL,
4045 channel_users_modes[i]->data,
4046 channel_users_modes[i]->len,
4048 silc_buffer_free(channel_users_modes[i]);
4050 silc_free(channel_users_modes);
4053 if (channel_topics) {
4056 for (i = 0; i < channel_users_modes_c; i++) {
4057 if (!channel_topics[i])
4060 silc_buffer_push(channel_topics[i],
4061 channel_topics[i]->data -
4062 channel_topics[i]->head);
4063 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4064 channel_topics[i]->len);
4065 silc_server_packet_send_dest(server, remote,
4066 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4067 channel_ids[i], SILC_ID_CHANNEL,
4068 channel_topics[i]->data,
4069 channel_topics[i]->len,
4071 silc_buffer_free(channel_topics[i]);
4073 silc_free(channel_topics);
4076 silc_free(channel_ids);
4079 /* Failure timeout callback. If this is called then we will immediately
4080 process the received failure. We always process the failure with timeout
4081 since we do not want to blindly trust to received failure packets.
4082 This won't be called (the timeout is cancelled) if the failure was
4083 bogus (it is bogus if remote does not close the connection after sending
4086 SILC_TASK_CALLBACK(silc_server_failure_callback)
4088 SilcServerFailureContext f = (SilcServerFailureContext)context;
4090 if (f->sock->protocol) {
4091 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4092 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4098 /* Assembles user list and users mode list from the `channel'. */
4100 bool silc_server_get_users_on_channel(SilcServer server,
4101 SilcChannelEntry channel,
4102 SilcBuffer *user_list,
4103 SilcBuffer *mode_list,
4104 SilcUInt32 *user_count)
4106 SilcChannelClientEntry chl;
4107 SilcHashTableList htl;
4108 SilcBuffer client_id_list;
4109 SilcBuffer client_mode_list;
4111 SilcUInt32 list_count = 0, len = 0;
4113 if (!silc_hash_table_count(channel->user_list))
4116 silc_hash_table_list(channel->user_list, &htl);
4117 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4118 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4119 silc_hash_table_list_reset(&htl);
4121 client_id_list = silc_buffer_alloc(len);
4123 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4124 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4125 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4127 silc_hash_table_list(channel->user_list, &htl);
4128 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4130 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4131 silc_buffer_put(client_id_list, idp->data, idp->len);
4132 silc_buffer_pull(client_id_list, idp->len);
4133 silc_buffer_free(idp);
4135 /* Client's mode on channel */
4136 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4137 silc_buffer_pull(client_mode_list, 4);
4141 silc_hash_table_list_reset(&htl);
4142 silc_buffer_push(client_id_list,
4143 client_id_list->data - client_id_list->head);
4144 silc_buffer_push(client_mode_list,
4145 client_mode_list->data - client_mode_list->head);
4147 *user_list = client_id_list;
4148 *mode_list = client_mode_list;
4149 *user_count = list_count;
4153 /* Saves users and their modes to the `channel'. */
4155 void silc_server_save_users_on_channel(SilcServer server,
4156 SilcSocketConnection sock,
4157 SilcChannelEntry channel,
4158 SilcClientID *noadd,
4159 SilcBuffer user_list,
4160 SilcBuffer mode_list,
4161 SilcUInt32 user_count)
4166 SilcClientID *client_id;
4167 SilcClientEntry client;
4168 SilcIDCacheEntry cache;
4169 SilcChannelClientEntry chl;
4172 SILC_LOG_DEBUG(("Start"));
4174 for (i = 0; i < user_count; i++) {
4176 SILC_GET16_MSB(idp_len, user_list->data + 2);
4178 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4179 silc_buffer_pull(user_list, idp_len);
4184 SILC_GET32_MSB(mode, mode_list->data);
4185 silc_buffer_pull(mode_list, 4);
4187 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4188 silc_free(client_id);
4194 /* Check if we have this client cached already. */
4195 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4196 server->server_type, &cache);
4198 client = silc_idlist_find_client_by_id(server->global_list,
4199 client_id, server->server_type,
4204 /* If router did not find such Client ID in its lists then this must
4205 be bogus client or some router in the net is buggy. */
4206 if (server->server_type == SILC_ROUTER) {
4207 silc_free(client_id);
4211 /* We don't have that client anywhere, add it. The client is added
4212 to global list since server didn't have it in the lists so it must be
4214 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4215 silc_id_dup(client_id, SILC_ID_CLIENT),
4216 sock->user_data, NULL, 0);
4218 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4219 silc_free(client_id);
4223 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4225 /* Found, if it is from global list we'll assure that we won't
4226 expire it now that the entry is on channel. */
4231 silc_free(client_id);
4233 if (!silc_server_client_on_channel(client, channel, &chl)) {
4234 /* Client was not on the channel, add it. */
4235 chl = silc_calloc(1, sizeof(*chl));
4236 chl->client = client;
4238 chl->channel = channel;
4239 silc_hash_table_add(channel->user_list, chl->client, chl);
4240 silc_hash_table_add(client->channels, chl->channel, chl);
4241 channel->user_count++;
4249 /* Saves channels and channels user modes to the `client'. Removes
4250 the client from those channels that are not sent in the list but
4253 void silc_server_save_user_channels(SilcServer server,
4254 SilcSocketConnection sock,
4255 SilcClientEntry client,
4256 SilcBuffer channels,
4257 SilcBuffer channels_user_modes)
4260 SilcUInt32 *chumodes;
4261 SilcChannelPayload entry;
4262 SilcChannelEntry channel;
4263 SilcChannelID *channel_id;
4264 SilcChannelClientEntry chl;
4265 SilcHashTable ht = NULL;
4266 SilcHashTableList htl;
4270 if (!channels ||!channels_user_modes)
4273 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4274 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4276 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4277 NULL, NULL, NULL, TRUE);
4278 silc_dlist_start(ch);
4279 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4280 /* Check if we have this channel, and add it if we don't have it.
4281 Also add the client on the channel unless it is there already. */
4282 channel_id = silc_channel_get_id_parse(entry);
4283 channel = silc_idlist_find_channel_by_id(server->local_list,
4286 channel = silc_idlist_find_channel_by_id(server->global_list,
4289 if (server->server_type != SILC_SERVER) {
4290 silc_free(channel_id);
4295 /* We don't have that channel anywhere, add it. */
4296 name = silc_channel_get_name(entry, NULL);
4297 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4298 channel_id, server->router,
4301 silc_free(channel_id);
4308 channel->mode = silc_channel_get_mode(entry);
4310 /* Add the client on the channel */
4311 if (!silc_server_client_on_channel(client, channel, &chl)) {
4312 chl = silc_calloc(1, sizeof(*chl));
4313 chl->client = client;
4314 chl->mode = chumodes[i++];
4315 chl->channel = channel;
4316 silc_hash_table_add(channel->user_list, chl->client, chl);
4317 silc_hash_table_add(client->channels, chl->channel, chl);
4318 channel->user_count++;
4321 chl->mode = chumodes[i++];
4324 silc_hash_table_add(ht, channel, channel);
4325 silc_free(channel_id);
4327 silc_channel_payload_list_free(ch);
4328 silc_free(chumodes);
4332 /* Go through the list again and remove client from channels that
4333 are no part of the list. */
4335 silc_hash_table_list(client->channels, &htl);
4336 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4337 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4338 silc_hash_table_del(chl->channel->user_list, chl->client);
4339 silc_hash_table_del(chl->client->channels, chl->channel);
4343 silc_hash_table_list_reset(&htl);
4344 silc_hash_table_free(ht);
4346 silc_hash_table_list(client->channels, &htl);
4347 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4348 silc_hash_table_del(chl->channel->user_list, chl->client);
4349 silc_hash_table_del(chl->client->channels, chl->channel);
4352 silc_hash_table_list_reset(&htl);
4356 /* Lookups route to the client indicated by the `id_data'. The connection
4357 object and internal data object is returned. Returns NULL if route
4358 could not be found to the client. If the `client_id' is specified then
4359 it is used and the `id_data' is ignored. */
4361 SilcSocketConnection
4362 silc_server_get_client_route(SilcServer server,
4363 unsigned char *id_data,
4365 SilcClientID *client_id,
4366 SilcIDListData *idata,
4367 SilcClientEntry *client_entry)
4370 SilcClientEntry client;
4372 SILC_LOG_DEBUG(("Start"));
4375 *client_entry = NULL;
4377 /* Decode destination Client ID */
4379 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4381 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4385 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4388 /* If the destination belongs to our server we don't have to route
4389 the packet anywhere but to send it to the local destination. */
4390 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4394 /* If we are router and the client has router then the client is in
4395 our cell but not directly connected to us. */
4396 if (server->server_type == SILC_ROUTER && client->router) {
4397 /* We are of course in this case the client's router thus the route
4398 to the client is the server who owns the client. So, we will send
4399 the packet to that server. */
4401 *idata = (SilcIDListData)client->router;
4402 return client->router->connection;
4405 /* Seems that client really is directly connected to us */
4407 *idata = (SilcIDListData)client;
4409 *client_entry = client;
4410 return client->connection;
4413 /* Destination belongs to someone not in this server. If we are normal
4414 server our action is to send the packet to our router. */
4415 if (server->server_type != SILC_ROUTER && !server->standalone) {
4418 *idata = (SilcIDListData)server->router;
4419 return SILC_PRIMARY_ROUTE(server);
4422 /* We are router and we will perform route lookup for the destination
4423 and send the packet to fastest route. */
4424 if (server->server_type == SILC_ROUTER && !server->standalone) {
4425 /* Check first that the ID is valid */
4426 client = silc_idlist_find_client_by_id(server->global_list, id,
4429 SilcSocketConnection dst_sock;
4431 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4435 *idata = (SilcIDListData)dst_sock->user_data;
4444 /* Encodes and returns channel list of channels the `client' has joined.
4445 Secret channels are not put to the list. */
4447 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4448 SilcClientEntry client,
4451 SilcBuffer *user_mode_list)
4453 SilcBuffer buffer = NULL;
4454 SilcChannelEntry channel;
4455 SilcChannelClientEntry chl;
4456 SilcHashTableList htl;
4459 SilcUInt16 name_len;
4463 *user_mode_list = NULL;
4465 silc_hash_table_list(client->channels, &htl);
4466 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4467 channel = chl->channel;
4469 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4471 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4474 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4475 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4476 name_len = strlen(channel->channel_name);
4478 len = 4 + name_len + id_len + 4;
4479 buffer = silc_buffer_realloc(buffer,
4480 (buffer ? buffer->truelen + len : len));
4481 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4482 silc_buffer_format(buffer,
4483 SILC_STR_UI_SHORT(name_len),
4484 SILC_STR_UI_XNSTRING(channel->channel_name,
4486 SILC_STR_UI_SHORT(id_len),
4487 SILC_STR_UI_XNSTRING(cid, id_len),
4488 SILC_STR_UI_INT(chl->channel->mode),
4490 silc_buffer_pull(buffer, len);
4493 if (user_mode_list) {
4494 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4496 (*user_mode_list)->truelen + 4 :
4498 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4499 (*user_mode_list)->data));
4500 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4501 silc_buffer_pull(*user_mode_list, 4);
4504 silc_hash_table_list_reset(&htl);
4507 silc_buffer_push(buffer, buffer->data - buffer->head);
4508 if (user_mode_list && *user_mode_list)
4509 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4510 (*user_mode_list)->head));
4515 /* Finds client entry by Client ID and if it is not found then resolves
4516 it using WHOIS command. */
4518 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4519 SilcClientID *client_id,
4520 bool always_resolve,
4523 SilcClientEntry client;
4528 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4531 client = silc_idlist_find_client_by_id(server->global_list,
4532 client_id, TRUE, NULL);
4533 if (!client && server->server_type == SILC_ROUTER)
4537 if (!client && server->standalone)
4540 if (!client || !client->nickname || !client->username ||
4542 SilcBuffer buffer, idp;
4545 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4546 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4547 client->resolve_cmd_ident = ++server->cmd_ident;
4550 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4551 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4552 server->cmd_ident, 1,
4553 4, idp->data, idp->len);
4554 silc_server_packet_send(server, client ? client->router->connection :
4555 SILC_PRIMARY_ROUTE(server),
4556 SILC_PACKET_COMMAND, 0,
4557 buffer->data, buffer->len, FALSE);
4558 silc_buffer_free(idp);
4559 silc_buffer_free(buffer);
4570 /* A timeout callback for the re-key. We will be the initiator of the
4573 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4575 SilcSocketConnection sock = (SilcSocketConnection)context;
4576 SilcIDListData idata = (SilcIDListData)sock->user_data;
4577 SilcServer server = (SilcServer)idata->rekey->context;
4578 SilcProtocol protocol;
4579 SilcServerRekeyInternalContext *proto_ctx;
4581 SILC_LOG_DEBUG(("Start"));
4583 /* Allocate internal protocol context. This is sent as context
4585 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4586 proto_ctx->server = (void *)server;
4587 proto_ctx->sock = sock;
4588 proto_ctx->responder = FALSE;
4589 proto_ctx->pfs = idata->rekey->pfs;
4591 /* Perform rekey protocol. Will call the final callback after the
4592 protocol is over. */
4593 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4594 &protocol, proto_ctx, silc_server_rekey_final);
4595 sock->protocol = protocol;
4597 /* Run the protocol */
4598 silc_protocol_execute(protocol, server->schedule, 0, 0);
4600 /* Re-register re-key timeout */
4601 silc_schedule_task_add(server->schedule, sock->sock,
4602 silc_server_rekey_callback,
4603 context, idata->rekey->timeout, 0,
4604 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4607 /* The final callback for the REKEY protocol. This will actually take the
4608 new key material into use. */
4610 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4612 SilcProtocol protocol = (SilcProtocol)context;
4613 SilcServerRekeyInternalContext *ctx =
4614 (SilcServerRekeyInternalContext *)protocol->context;
4615 SilcServer server = (SilcServer)ctx->server;
4616 SilcSocketConnection sock = ctx->sock;
4618 SILC_LOG_DEBUG(("Start"));
4620 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4621 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4622 /* Error occured during protocol */
4623 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4624 silc_protocol_cancel(protocol, server->schedule);
4625 silc_protocol_free(protocol);
4626 sock->protocol = NULL;
4628 silc_packet_context_free(ctx->packet);
4630 silc_ske_free(ctx->ske);
4635 /* Purge the outgoing data queue to assure that all rekey packets really
4636 go to the network before we quit the protocol. */
4637 silc_server_packet_queue_purge(server, sock);
4640 silc_protocol_free(protocol);
4641 sock->protocol = NULL;
4643 silc_packet_context_free(ctx->packet);
4645 silc_ske_free(ctx->ske);
4649 /* Task callback used to retrieve network statistical information from
4650 router server once in a while. */
4652 SILC_TASK_CALLBACK(silc_server_get_stats)
4654 SilcServer server = (SilcServer)context;
4655 SilcBuffer idp, packet;
4657 SILC_LOG_DEBUG(("Retrieving stats from router"));
4659 if (!server->standalone) {
4660 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4661 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4662 ++server->cmd_ident, 1,
4663 1, idp->data, idp->len);
4664 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4665 SILC_PACKET_COMMAND, 0, packet->data,
4666 packet->len, FALSE);
4667 silc_buffer_free(packet);
4668 silc_buffer_free(idp);
4671 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4672 server, 120, 0, SILC_TASK_TIMEOUT,