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_rehash_close_connection);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
33 SILC_TASK_CALLBACK(silc_server_connect_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
36 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
39 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
40 SILC_TASK_CALLBACK(silc_server_packet_process);
41 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
42 SILC_TASK_CALLBACK(silc_server_close_connection_final);
43 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
44 SILC_TASK_CALLBACK(silc_server_timeout_remote);
45 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
46 SILC_TASK_CALLBACK(silc_server_failure_callback);
47 SILC_TASK_CALLBACK(silc_server_rekey_callback);
48 SILC_TASK_CALLBACK(silc_server_get_stats);
50 /* Allocates a new SILC server object. This has to be done before the server
51 can be used. After allocation one must call silc_server_init to initialize
52 the server. The new allocated server object is returned to the new_server
55 int silc_server_alloc(SilcServer *new_server)
59 SILC_LOG_DEBUG(("Allocating new server object"));
61 server = silc_calloc(1, sizeof(*server));
62 server->server_type = SILC_SERVER;
63 server->standalone = TRUE;
64 server->local_list = silc_calloc(1, sizeof(*server->local_list));
65 server->global_list = silc_calloc(1, sizeof(*server->global_list));
66 server->pending_commands = silc_dlist_init();
68 server->sim = silc_dlist_init();
76 /* Free's the SILC server object. This is called at the very end before
79 void silc_server_free(SilcServer server)
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_server_config_unref(&server->config_ref);
98 silc_rng_free(server->rng);
100 silc_pkcs_free(server->pkcs);
101 if (server->public_key)
102 silc_pkcs_public_key_free(server->public_key);
103 if (server->private_key)
104 silc_pkcs_private_key_free(server->private_key);
105 if (server->pending_commands)
106 silc_dlist_uninit(server->pending_commands);
107 if (server->id_entry)
108 silc_idlist_del_server(server->local_list, server->id_entry);
110 silc_idcache_free(server->local_list->clients);
111 silc_idcache_free(server->local_list->servers);
112 silc_idcache_free(server->local_list->channels);
113 silc_idcache_free(server->global_list->clients);
114 silc_idcache_free(server->global_list->servers);
115 silc_idcache_free(server->global_list->channels);
116 silc_hash_table_free(server->watcher_list);
118 silc_hash_free(server->md5hash);
119 silc_hash_free(server->sha1hash);
120 silc_hmac_unregister_all();
121 silc_hash_unregister_all();
122 silc_cipher_unregister_all();
123 silc_pkcs_unregister_all();
125 silc_free(server->local_list);
126 silc_free(server->global_list);
127 silc_free(server->server_name);
128 silc_free(server->id_string);
129 silc_free(server->purge_i);
130 silc_free(server->purge_g);
134 /* Creates a new server listener. */
136 static bool silc_server_listen(SilcServer server, const char *server_ip,
137 SilcUInt16 port, int *sock)
139 *sock = silc_net_create_server(port, server_ip);
141 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
148 /* Adds a secondary listener. */
150 bool silc_server_init_secondary(SilcServer server)
152 int sock = 0, sock_list[server->config->param.connections_max];
153 SilcSocketConnection newsocket = NULL;
154 SilcServerConfigServerInfoInterface *interface;
156 for (interface = server->config->server_info->secondary; interface;
157 interface = interface->next, sock++) {
159 if (!silc_server_listen(server,
160 interface->server_ip, interface->port, &sock_list[sock]))
163 /* Set socket to non-blocking mode */
164 silc_net_set_socket_nonblock(sock_list[sock]);
166 /* Add ourselves also to the socket table. The entry allocated above
167 is sent as argument for fast referencing in the future. */
168 silc_socket_alloc(sock_list[sock],
169 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
170 server->sockets[sock_list[sock]] = newsocket;
171 SILC_SET_LISTENER(newsocket);
173 /* Perform name and address lookups to resolve the listenning address
175 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
177 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
179 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
180 newsocket->hostname ? newsocket->hostname :
181 newsocket->ip ? newsocket->ip : ""));
182 server->stat.conn_failures++;
185 if (!newsocket->hostname)
186 newsocket->hostname = strdup(newsocket->ip);
188 newsocket->port = silc_net_get_local_port(sock);
190 newsocket->user_data = (void *)server->id_entry;
191 silc_schedule_task_add(server->schedule, sock_list[sock],
192 silc_server_accept_new_connection,
193 (void *)server, 0, 0,
195 SILC_TASK_PRI_NORMAL);
201 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
205 /* Initializes the entire SILC server. This is called always before running
206 the server. This is called only once at the initialization of the program.
207 This binds the server to its listenning port. After this function returns
208 one should call silc_server_run to start the server. This returns TRUE
209 when everything is ok to run the server. Configuration file must be
210 read and parsed before calling this. */
212 bool silc_server_init(SilcServer server)
216 SilcServerEntry id_entry;
217 SilcIDListPurge purge;
218 SilcSocketConnection newsocket = NULL;
220 SILC_LOG_DEBUG(("Initializing server"));
222 server->starttime = time(NULL);
224 /* Take config object for us */
225 silc_server_config_ref(&server->config_ref, server->config,
228 /* Steal public and private key from the config object */
229 server->public_key = server->config->server_info->public_key;
230 server->private_key = server->config->server_info->private_key;
231 server->config->server_info->public_key = NULL;
232 server->config->server_info->private_key = NULL;
234 /* Register all configured ciphers, PKCS and hash functions. */
235 if (!silc_server_config_register_ciphers(server))
236 silc_cipher_register_default();
237 if (!silc_server_config_register_pkcs(server))
238 silc_pkcs_register_default();
239 if (!silc_server_config_register_hashfuncs(server))
240 silc_hash_register_default();
241 if (!silc_server_config_register_hmacs(server))
242 silc_hmac_register_default();
244 /* Initialize random number generator for the server. */
245 server->rng = silc_rng_alloc();
246 silc_rng_init(server->rng);
247 silc_rng_global_init(server->rng);
249 /* Initialize hash functions for server to use */
250 silc_hash_alloc("md5", &server->md5hash);
251 silc_hash_alloc("sha1", &server->sha1hash);
253 /* Allocate PKCS context for local public and private keys */
254 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
256 silc_pkcs_public_key_set(server->pkcs, server->public_key);
257 silc_pkcs_private_key_set(server->pkcs, server->private_key);
259 /* Initialize the scheduler */
260 server->schedule = silc_schedule_init(server->config->param.connections_max);
261 if (!server->schedule)
264 /* First, register log files configuration for error output */
265 silc_server_config_setlogfiles(server);
267 /* Initialize ID caches */
268 server->local_list->clients =
269 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
270 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
271 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
273 /* These are allocated for normal server as well as these hold some
274 global information that the server has fetched from its router. For
275 router these are used as they are supposed to be used on router. */
276 server->global_list->clients =
277 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
278 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
279 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
281 /* Init watcher list */
282 server->watcher_list =
283 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
284 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
286 if (!server->watcher_list)
289 /* Create a listening server */
290 if (!silc_server_listen(server,
291 server->config->server_info->primary == NULL ? NULL :
292 server->config->server_info->primary->server_ip,
293 server->config->server_info->primary == NULL ? 0 :
294 server->config->server_info->primary->port,
298 /* Set socket to non-blocking mode */
299 silc_net_set_socket_nonblock(sock);
302 /* Allocate the entire socket list that is used in server. Eventually
303 all connections will have entry in this table (it is a table of
304 pointers to the actual object that is allocated individually
306 server->sockets = silc_calloc(server->config->param.connections_max,
307 sizeof(*server->sockets));
308 if (!server->sockets)
311 /* Add ourselves also to the socket table. The entry allocated above
312 is sent as argument for fast referencing in the future. */
313 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
314 server->sockets[sock] = newsocket;
315 SILC_SET_LISTENER(newsocket);
317 /* Perform name and address lookups to resolve the listenning address
319 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
321 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
323 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
324 newsocket->hostname ? newsocket->hostname :
325 newsocket->ip ? newsocket->ip : ""));
326 server->stat.conn_failures++;
329 if (!newsocket->hostname)
330 newsocket->hostname = strdup(newsocket->ip);
332 newsocket->port = silc_net_get_local_port(sock);
334 /* Create a Server ID for the server. */
335 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
340 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
341 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
342 server->server_name = server->config->server_info->server_name;
343 server->config->server_info->server_name = NULL;
345 /* Add ourselves to the server list. We don't have a router yet
346 beacuse we haven't established a route yet. It will be done later.
347 For now, NULL is sent as router. This allocates new entry to
350 silc_idlist_add_server(server->local_list, strdup(server->server_name),
351 server->server_type, server->id, NULL, NULL);
353 SILC_LOG_ERROR(("Could not add ourselves to cache"));
356 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
358 /* Put the allocated socket pointer also to the entry allocated above
359 for fast back-referencing to the socket list. */
360 newsocket->user_data = (void *)id_entry;
361 id_entry->connection = (void *)newsocket;
362 server->id_entry = id_entry;
364 /* Register protocols */
365 silc_server_protocols_register();
367 /* Add the first task to the scheduler. This is task that is executed by
368 timeout. It expires as soon as the caller calls silc_server_run. This
369 task performs authentication protocol and key exchange with our
371 silc_schedule_task_add(server->schedule, 0,
372 silc_server_connect_to_router,
373 (void *)server, 0, 1,
375 SILC_TASK_PRI_NORMAL);
377 /* Add listener task to the scheduler. This task receives new connections
378 to the server. This task remains on the queue until the end of the
380 silc_schedule_task_add(server->schedule, sock,
381 silc_server_accept_new_connection,
382 (void *)server, 0, 0,
384 SILC_TASK_PRI_NORMAL);
386 if (silc_server_init_secondary(server) == FALSE)
389 server->listenning = TRUE;
391 /* If server connections has been configured then we must be router as
392 normal server cannot have server connections, only router connections. */
393 if (server->config->servers) {
394 SilcServerConfigServer *ptr = server->config->servers;
396 server->server_type = SILC_ROUTER;
398 if (ptr->backup_router) {
399 server->server_type = SILC_BACKUP_ROUTER;
400 server->backup_router = TRUE;
401 server->id_entry->server_type = SILC_BACKUP_ROUTER;
408 /* Register the ID Cache purge task. This periodically purges the ID cache
409 and removes the expired cache entries. */
411 /* Clients local list */
412 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
413 purge->cache = server->local_list->clients;
414 purge->schedule = server->schedule;
415 purge->timeout = 600;
416 silc_schedule_task_add(purge->schedule, 0,
418 (void *)purge, purge->timeout, 0,
419 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
421 /* Clients global list */
422 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
423 purge->cache = server->global_list->clients;
424 purge->schedule = server->schedule;
425 purge->timeout = 300;
426 silc_schedule_task_add(purge->schedule, 0,
428 (void *)purge, purge->timeout, 0,
429 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
431 /* If we are normal server we'll retrieve network statisticial information
432 once in a while from the router. */
433 if (server->server_type == SILC_SERVER)
434 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
435 server, 10, 0, SILC_TASK_TIMEOUT,
438 if (server->server_type == SILC_ROUTER)
439 server->stat.routers++;
441 SILC_LOG_DEBUG(("Server initialized"));
443 /* We are done here, return succesfully */
447 silc_server_config_unref(&server->config_ref);
448 silc_net_close_server(sock);
452 /* Task callback to close a socket connection after rehash */
454 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
456 SilcServer server = context;
457 SilcSocketConnection sock = server->sockets[fd];
462 SILC_LOG_INFO(("Closing connection %s:%d [%s]: connection is unconfigured",
463 sock->hostname, sock->port,
464 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
465 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
466 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
468 silc_schedule_task_del_by_context(server->schedule, sock);
469 silc_server_disconnect_remote(server, sock,
470 SILC_STATUS_ERR_BANNED_FROM_SERVER,
471 "This connection is removed from "
474 silc_server_free_sock_user_data(server, sock, NULL);
477 /* This function basically reads the config file again and switches the config
478 object pointed by the server object. After that, we have to fix various
479 things such as the server_name and the listening ports.
480 Keep in mind that we no longer have the root privileges at this point. */
482 bool silc_server_rehash(SilcServer server)
484 SilcServerConfig newconfig;
486 SILC_LOG_INFO(("Rehashing server"));
488 /* Reset the logging system */
489 silc_log_quick = TRUE;
490 silc_log_flush_all();
492 /* Start the main rehash phase (read again the config file) */
493 newconfig = silc_server_config_alloc(server->config_file);
495 SILC_LOG_ERROR(("Rehash FAILED."));
499 /* Reinit scheduler if necessary */
500 if (newconfig->param.connections_max > server->config->param.connections_max)
501 if (!silc_schedule_reinit(server->schedule,
502 newconfig->param.connections_max))
505 /* Fix the server_name field */
506 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
507 silc_free(server->server_name);
508 server->server_name = newconfig->server_info->server_name;
509 newconfig->server_info->server_name = NULL;
511 /* Update the idcache list with a fresh pointer */
512 silc_free(server->id_entry->server_name);
513 server->id_entry->server_name = strdup(server->server_name);
514 if (!silc_idcache_del_by_context(server->local_list->servers,
517 if (!silc_idcache_add(server->local_list->servers,
518 server->id_entry->server_name,
519 server->id_entry->id, server->id_entry, 0, NULL))
524 silc_server_config_setlogfiles(server);
526 /* Change new key pair if necessary */
527 if (newconfig->server_info->public_key &&
528 !silc_pkcs_public_key_compare(server->public_key,
529 newconfig->server_info->public_key)) {
530 silc_pkcs_public_key_free(server->public_key);
531 silc_pkcs_private_key_free(server->private_key);
532 server->public_key = newconfig->server_info->public_key;
533 server->private_key = newconfig->server_info->private_key;
534 newconfig->server_info->public_key = NULL;
535 newconfig->server_info->private_key = NULL;
537 /* Allocate PKCS context for local public and private keys */
538 silc_pkcs_free(server->pkcs);
539 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
541 silc_pkcs_public_key_set(server->pkcs, server->public_key);
542 silc_pkcs_private_key_set(server->pkcs, server->private_key);
545 /* Check for unconfigured server and router connections and close
546 connections that were unconfigured. */
548 if (server->config->routers) {
549 SilcServerConfigRouter *ptr;
550 SilcServerConfigRouter *newptr;
553 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
556 /* Check whether new config has this one too */
557 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
558 if (!strcmp(newptr->host, ptr->host) && newptr->port == ptr->port &&
559 newptr->initiator == ptr->initiator) {
566 /* Remove this connection */
567 SilcSocketConnection sock;
568 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
569 ptr->host, ptr->port);
570 if (sock && !SILC_IS_LISTENER(sock))
571 silc_schedule_task_add(server->schedule, sock->sock,
572 silc_server_rehash_close_connection,
573 server, 0, 1, SILC_TASK_TIMEOUT,
574 SILC_TASK_PRI_NORMAL);
579 if (server->config->servers) {
580 SilcServerConfigServer *ptr;
581 SilcServerConfigServer *newptr;
584 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
587 /* Check whether new config has this one too */
588 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
589 if (!strcmp(newptr->host, ptr->host)) {
596 /* Remove this connection */
597 SilcSocketConnection sock;
598 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
600 if (sock && !SILC_IS_LISTENER(sock))
601 silc_schedule_task_add(server->schedule, sock->sock,
602 silc_server_rehash_close_connection,
603 server, 0, 1, SILC_TASK_TIMEOUT,
604 SILC_TASK_PRI_NORMAL);
609 /* Go through all configured routers after rehash */
610 silc_schedule_task_add(server->schedule, 0,
611 silc_server_connect_to_router,
612 (void *)server, 0, 1,
614 SILC_TASK_PRI_NORMAL);
616 /* Check whether our router status has changed */
617 if (newconfig->servers) {
618 SilcServerConfigServer *ptr = newconfig->servers;
620 server->server_type = SILC_ROUTER;
622 if (ptr->backup_router) {
623 server->server_type = SILC_BACKUP_ROUTER;
624 server->backup_router = TRUE;
625 server->id_entry->server_type = SILC_BACKUP_ROUTER;
632 /* Our old config is gone now. We'll unreference our reference made in
633 silc_server_init and then destroy it since we are destroying it
634 underneath the application (layer which called silc_server_init). */
635 silc_server_config_unref(&server->config_ref);
636 silc_server_config_destroy(server->config);
638 /* Take new config context */
639 server->config = newconfig;
640 silc_server_config_ref(&server->config_ref, server->config, server->config);
642 SILC_LOG_DEBUG(("Server rehashed"));
647 /* The heart of the server. This runs the scheduler thus runs the server.
648 When this returns the server has been stopped and the program will
651 void silc_server_run(SilcServer server)
653 SILC_LOG_INFO(("SILC Server started"));
655 /* Start the scheduler, the heart of the SILC server. When this returns
656 the program will be terminated. */
657 silc_schedule(server->schedule);
660 /* Stops the SILC server. This function is used to shutdown the server.
661 This is usually called after the scheduler has returned. After stopping
662 the server one should call silc_server_free. */
664 void silc_server_stop(SilcServer server)
666 SILC_LOG_DEBUG(("Stopping server"));
668 if (server->schedule) {
671 server->server_shutdown = TRUE;
673 /* Close all connections */
674 for (i = 0; i < server->config->param.connections_max; i++) {
675 if (!server->sockets[i])
677 if (!SILC_IS_LISTENER(server->sockets[i])) {
678 SilcIDListData idata = server->sockets[i]->user_data;
681 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
683 silc_schedule_task_del_by_context(server->schedule,
685 silc_server_disconnect_remote(server, server->sockets[i],
687 "Server is shutting down");
689 silc_socket_free(server->sockets[i]);
690 server->sockets[i] = NULL;
694 /* We are not connected to network anymore */
695 server->standalone = TRUE;
697 silc_schedule_stop(server->schedule);
698 silc_schedule_uninit(server->schedule);
699 server->schedule = NULL;
701 silc_free(server->sockets);
702 server->sockets = NULL;
705 silc_server_protocols_unregister();
707 SILC_LOG_DEBUG(("Server stopped"));
710 /* Function that is called when the network connection to a router has
711 been established. This will continue with the key exchange protocol
712 with the remote router. */
714 void silc_server_start_key_exchange(SilcServer server,
715 SilcServerConnection sconn,
718 SilcSocketConnection newsocket;
719 SilcProtocol protocol;
720 SilcServerKEInternalContext *proto_ctx;
721 SilcServerConfigRouter *conn =
722 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
725 /* Cancel any possible retry timeouts */
726 silc_schedule_task_del_by_callback(server->schedule,
727 silc_server_connect_to_router_retry);
729 /* Set socket options */
730 silc_net_set_socket_nonblock(sock);
731 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
733 /* Create socket connection for the connection. Even though we
734 know that we are connecting to a router we will mark the socket
735 to be unknown connection until we have executed authentication
737 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
738 server->sockets[sock] = newsocket;
739 newsocket->hostname = strdup(sconn->remote_host);
740 newsocket->ip = strdup(sconn->remote_host);
741 newsocket->port = sconn->remote_port;
742 sconn->sock = newsocket;
744 /* Allocate internal protocol context. This is sent as context
746 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
747 proto_ctx->server = (void *)server;
748 proto_ctx->context = (void *)sconn;
749 proto_ctx->sock = newsocket;
750 proto_ctx->rng = server->rng;
751 proto_ctx->responder = FALSE;
753 /* Set Key Exchange flags from configuration, but fall back to global
755 SILC_GET_SKE_FLAGS(conn, proto_ctx);
756 if (server->config->param.key_exchange_pfs)
757 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
759 /* Perform key exchange protocol. silc_server_connect_to_router_second
760 will be called after the protocol is finished. */
761 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
762 &protocol, proto_ctx,
763 silc_server_connect_to_router_second);
764 newsocket->protocol = protocol;
766 /* Register a timeout task that will be executed if the protocol
767 is not executed within set limit. */
768 proto_ctx->timeout_task =
769 silc_schedule_task_add(server->schedule, sock,
770 silc_server_timeout_remote,
771 server, server->config->key_exchange_timeout, 0,
775 /* Register the connection for network input and output. This sets
776 that scheduler will listen for incoming packets for this connection
777 and sets that outgoing packets may be sent to this connection as
778 well. However, this doesn't set the scheduler for outgoing traffic,
779 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
780 later when outgoing data is available. */
781 context = (void *)server;
782 SILC_REGISTER_CONNECTION_FOR_IO(sock);
784 /* Run the protocol */
785 silc_protocol_execute(protocol, server->schedule, 0, 0);
788 /* Timeout callback that will be called to retry connecting to remote
789 router. This is used by both normal and router server. This will wait
790 before retrying the connecting. The timeout is generated by exponential
791 backoff algorithm. */
793 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
795 SilcServerConnection sconn = (SilcServerConnection)context;
796 SilcServer server = sconn->server;
797 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
798 SilcServerConfigConnParams *param =
799 (conn->param ? conn->param : &server->config->param);
801 SILC_LOG_INFO(("Retrying connecting to a router"));
803 /* Calculate next timeout */
804 if (sconn->retry_count >= 1) {
805 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
806 if (sconn->retry_timeout > param->reconnect_interval_max)
807 sconn->retry_timeout = param->reconnect_interval_max;
809 sconn->retry_timeout = param->reconnect_interval;
811 sconn->retry_count++;
812 sconn->retry_timeout = sconn->retry_timeout +
813 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
815 /* If we've reached max retry count, give up. */
816 if ((sconn->retry_count > param->reconnect_count) &&
817 !param->reconnect_keep_trying) {
818 SILC_LOG_ERROR(("Could not connect to router, giving up"));
819 silc_server_config_unref(&sconn->conn);
820 silc_free(sconn->remote_host);
821 silc_free(sconn->backup_replace_ip);
826 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
827 sconn->retry_timeout));
829 /* We will lookup a fresh pointer later */
830 silc_server_config_unref(&sconn->conn);
832 /* Wait one before retrying */
833 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
834 context, sconn->retry_timeout, 0,
835 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
838 /* Generic routine to use connect to a router. */
840 SILC_TASK_CALLBACK(silc_server_connect_router)
842 SilcServerConnection sconn = (SilcServerConnection)context;
843 SilcServer server = sconn->server;
844 SilcServerConfigRouter *rconn;
847 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
848 (sconn->backup ? "backup router" : "router"),
849 sconn->remote_host, sconn->remote_port));
851 server->router_connect = time(NULL);
852 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
855 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
856 (sconn->backup ? "backup router" : "router"),
857 sconn->remote_host, sconn->remote_port));
858 silc_free(sconn->remote_host);
859 silc_free(sconn->backup_replace_ip);
863 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
865 /* Connect to remote host */
866 sock = silc_net_create_connection(
867 (!server->config->server_info->primary ? NULL :
868 server->config->server_info->primary->server_ip),
869 sconn->remote_port, sconn->remote_host);
871 SILC_LOG_ERROR(("Could not connect to router %s:%d",
872 sconn->remote_host, sconn->remote_port));
873 if (!sconn->no_reconnect)
874 silc_schedule_task_add(server->schedule, 0,
875 silc_server_connect_to_router_retry,
876 context, 0, 1, SILC_TASK_TIMEOUT,
877 SILC_TASK_PRI_NORMAL);
879 silc_server_config_unref(&sconn->conn);
883 /* Continue with key exchange protocol */
884 silc_server_start_key_exchange(server, sconn, sock);
887 /* This function connects to our primary router or if we are a router this
888 establishes all our primary routes. This is called at the start of the
889 server to do authentication and key exchange with our router - called
892 SILC_TASK_CALLBACK(silc_server_connect_to_router)
894 SilcServer server = (SilcServer)context;
895 SilcServerConnection sconn;
896 SilcServerConfigRouter *ptr;
898 SILC_LOG_DEBUG(("We are %s",
899 (server->server_type == SILC_SERVER ?
900 "normal server" : server->server_type == SILC_ROUTER ?
901 "router" : "backup router/normal server")));
903 if (!server->config->routers) {
904 /* There wasn't a configured router, we will continue but we don't
905 have a connection to outside world. We will be standalone server. */
906 SILC_LOG_DEBUG(("No router(s), we are standalone"));
907 server->standalone = TRUE;
911 /* Cancel any possible retry timeouts */
912 silc_schedule_task_del_by_callback(server->schedule,
913 silc_server_connect_router);
914 silc_schedule_task_del_by_callback(server->schedule,
915 silc_server_connect_to_router_retry);
917 /* Create the connections to all our routes */
918 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
920 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
921 ptr->backup_router ? "Backup router" : "Router",
922 ptr->initiator ? "Initiator" : "Responder",
923 ptr->host, ptr->port));
925 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
926 ptr->initiator == FALSE && !server->backup_router &&
927 !silc_server_config_get_backup_router(server))
928 server->wait_backup = TRUE;
930 if (ptr->initiator) {
931 /* Check whether we are connected to this host already */
932 if (silc_server_num_sockets_by_remote(server,
933 silc_net_is_ip(ptr->host) ?
935 silc_net_is_ip(ptr->host) ?
936 NULL : ptr->host, ptr->port,
937 SILC_SOCKET_TYPE_ROUTER)) {
938 SILC_LOG_DEBUG(("We are already connected to this router"));
942 /* Allocate connection object for hold connection specific stuff. */
943 sconn = silc_calloc(1, sizeof(*sconn));
944 sconn->server = server;
945 sconn->remote_host = strdup(ptr->host);
946 sconn->remote_port = ptr->port;
947 sconn->backup = ptr->backup_router;
949 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
950 sconn->backup_replace_port = ptr->backup_replace_port;
953 if (!server->router_conn && !sconn->backup)
954 server->router_conn = sconn;
956 silc_schedule_task_add(server->schedule, 0,
957 silc_server_connect_router,
958 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
959 SILC_TASK_PRI_NORMAL);
964 /* Second part of connecting to router(s). Key exchange protocol has been
965 executed and now we will execute authentication protocol. */
967 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
969 SilcProtocol protocol = (SilcProtocol)context;
970 SilcServerKEInternalContext *ctx =
971 (SilcServerKEInternalContext *)protocol->context;
972 SilcServer server = (SilcServer)ctx->server;
973 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
974 SilcSocketConnection sock = ctx->sock;
975 SilcServerConnAuthInternalContext *proto_ctx;
976 SilcServerConfigRouter *conn = NULL;
978 SILC_LOG_DEBUG(("Start"));
980 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
981 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
982 /* Error occured during protocol */
983 silc_protocol_free(protocol);
984 sock->protocol = NULL;
985 silc_ske_free_key_material(ctx->keymat);
987 silc_packet_context_free(ctx->packet);
989 silc_ske_free(ctx->ske);
990 silc_free(ctx->dest_id);
992 silc_schedule_task_del_by_callback(server->schedule,
993 silc_server_failure_callback);
994 silc_server_disconnect_remote(server, sock,
995 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
997 /* Try reconnecting if configuration wants it */
998 if (!sconn->no_reconnect) {
999 silc_schedule_task_add(server->schedule, 0,
1000 silc_server_connect_to_router_retry,
1001 sconn, 0, 1, SILC_TASK_TIMEOUT,
1002 SILC_TASK_PRI_NORMAL);
1006 /* Call completion to indicate error */
1007 if (sconn->callback)
1008 (*sconn->callback)(server, NULL, sconn->callback_context);
1010 silc_server_config_unref(&sconn->conn);
1011 silc_free(sconn->remote_host);
1012 silc_free(sconn->backup_replace_ip);
1017 /* We now have the key material as the result of the key exchange
1018 protocol. Take the key material into use. Free the raw key material
1019 as soon as we've set them into use. */
1020 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1021 ctx->sock, ctx->keymat,
1022 ctx->ske->prop->cipher,
1023 ctx->ske->prop->pkcs,
1024 ctx->ske->prop->hash,
1025 ctx->ske->prop->hmac,
1026 ctx->ske->prop->group,
1028 silc_protocol_free(protocol);
1029 sock->protocol = NULL;
1030 silc_ske_free_key_material(ctx->keymat);
1032 silc_packet_context_free(ctx->packet);
1034 silc_ske_free(ctx->ske);
1035 silc_free(ctx->dest_id);
1037 silc_schedule_task_del_by_callback(server->schedule,
1038 silc_server_failure_callback);
1039 silc_server_disconnect_remote(server, sock,
1040 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1042 /* Try reconnecting if configuration wants it */
1043 if (!sconn->no_reconnect) {
1044 silc_schedule_task_add(server->schedule, 0,
1045 silc_server_connect_to_router_retry,
1046 sconn, 0, 1, SILC_TASK_TIMEOUT,
1047 SILC_TASK_PRI_NORMAL);
1051 /* Call completion to indicate error */
1052 if (sconn->callback)
1053 (*sconn->callback)(server, NULL, sconn->callback_context);
1055 silc_server_config_unref(&sconn->conn);
1056 silc_free(sconn->remote_host);
1057 silc_free(sconn->backup_replace_ip);
1061 silc_ske_free_key_material(ctx->keymat);
1063 /* Allocate internal context for the authentication protocol. This
1064 is sent as context for the protocol. */
1065 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1066 proto_ctx->server = (void *)server;
1067 proto_ctx->context = (void *)sconn;
1068 proto_ctx->sock = sock;
1069 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1070 proto_ctx->dest_id_type = ctx->dest_id_type;
1071 proto_ctx->dest_id = ctx->dest_id;
1073 /* Resolve the authentication method used in this connection. Check if
1074 we find a match from user configured connections */
1075 if (!sconn->conn.ref_ptr)
1076 conn = silc_server_config_find_router_conn(server, sock->hostname,
1079 conn = sconn->conn.ref_ptr;
1082 /* Match found. Use the configured authentication method. Take only
1083 the passphrase, since for public key auth we automatically use
1084 our local key pair. */
1085 if (conn->passphrase) {
1086 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1087 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1089 proto_ctx->auth_data = strdup(conn->passphrase);
1090 proto_ctx->auth_data_len = strlen(conn->passphrase);
1091 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1093 } else if (conn->publickeys) {
1094 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1096 proto_ctx->auth_meth = SILC_AUTH_NONE;
1099 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1100 sock->hostname, sock->ip, sock->port));
1101 silc_protocol_free(protocol);
1102 sock->protocol = NULL;
1104 silc_packet_context_free(ctx->packet);
1106 silc_ske_free(ctx->ske);
1107 silc_free(ctx->dest_id);
1109 silc_server_config_unref(&sconn->conn);
1110 silc_free(sconn->remote_host);
1111 silc_free(sconn->backup_replace_ip);
1113 silc_schedule_task_del_by_callback(server->schedule,
1114 silc_server_failure_callback);
1115 silc_server_disconnect_remote(server, sock,
1116 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1120 /* Free old protocol as it is finished now */
1121 silc_protocol_free(protocol);
1123 silc_packet_context_free(ctx->packet);
1125 sock->protocol = NULL;
1127 /* Allocate the authentication protocol. This is allocated here
1128 but we won't start it yet. We will be receiving party of this
1129 protocol thus we will wait that connecting party will make
1130 their first move. */
1131 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1132 &sock->protocol, proto_ctx,
1133 silc_server_connect_to_router_final);
1135 /* Register timeout task. If the protocol is not executed inside
1136 this timelimit the connection will be terminated. */
1137 proto_ctx->timeout_task =
1138 silc_schedule_task_add(server->schedule, sock->sock,
1139 silc_server_timeout_remote,
1141 server->config->conn_auth_timeout, 0,
1145 /* Run the protocol */
1146 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1149 /* Finalizes the connection to router. Registers a server task to the
1150 queue so that we can accept new connections. */
1152 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1154 SilcProtocol protocol = (SilcProtocol)context;
1155 SilcServerConnAuthInternalContext *ctx =
1156 (SilcServerConnAuthInternalContext *)protocol->context;
1157 SilcServer server = (SilcServer)ctx->server;
1158 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1159 SilcSocketConnection sock = ctx->sock;
1160 SilcServerEntry id_entry = NULL;
1162 SilcServerHBContext hb_context;
1163 unsigned char *id_string;
1165 SilcIDListData idata;
1166 SilcServerConfigRouter *conn = NULL;
1167 SilcServerConfigConnParams *param = NULL;
1169 SILC_LOG_DEBUG(("Start"));
1171 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1172 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1173 /* Error occured during protocol */
1174 silc_free(ctx->dest_id);
1175 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1178 /* Try reconnecting if configuration wants it */
1179 if (!sconn->no_reconnect) {
1180 silc_schedule_task_add(server->schedule, 0,
1181 silc_server_connect_to_router_retry,
1182 sconn, 0, 1, SILC_TASK_TIMEOUT,
1183 SILC_TASK_PRI_NORMAL);
1190 /* Add a task to the queue. This task receives new connections to the
1191 server. This task remains on the queue until the end of the program. */
1192 if (!server->listenning && !sconn->backup) {
1193 silc_schedule_task_add(server->schedule, server->sock,
1194 silc_server_accept_new_connection,
1195 (void *)server, 0, 0,
1197 SILC_TASK_PRI_NORMAL);
1198 server->listenning = TRUE;
1201 /* Send NEW_SERVER packet to the router. We will become registered
1202 to the SILC network after sending this packet. */
1203 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1204 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1205 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1206 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1207 silc_buffer_format(packet,
1208 SILC_STR_UI_SHORT(id_len),
1209 SILC_STR_UI_XNSTRING(id_string, id_len),
1210 SILC_STR_UI_SHORT(strlen(server->server_name)),
1211 SILC_STR_UI_XNSTRING(server->server_name,
1212 strlen(server->server_name)),
1215 /* Send the packet */
1216 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1217 packet->data, packet->len, TRUE);
1218 silc_buffer_free(packet);
1219 silc_free(id_string);
1221 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1223 /* Check that we do not have this ID already */
1224 id_entry = silc_idlist_find_server_by_id(server->local_list,
1225 ctx->dest_id, TRUE, NULL);
1227 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1229 id_entry = silc_idlist_find_server_by_id(server->global_list,
1230 ctx->dest_id, TRUE, NULL);
1232 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1235 SILC_LOG_DEBUG(("New server id(%s)",
1236 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1238 /* Add the connected router to global server list. Router is sent
1239 as NULL since it's local to us. */
1240 id_entry = silc_idlist_add_server(server->global_list,
1241 strdup(sock->hostname),
1242 SILC_ROUTER, ctx->dest_id, NULL, sock);
1244 silc_free(ctx->dest_id);
1245 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1246 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1251 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1252 silc_free(sock->user_data);
1253 sock->user_data = (void *)id_entry;
1254 sock->type = SILC_SOCKET_TYPE_ROUTER;
1255 idata = (SilcIDListData)sock->user_data;
1256 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1257 SILC_IDLIST_STATUS_LOCAL);
1259 conn = sconn->conn.ref_ptr;
1260 param = &server->config->param;
1261 if (conn && conn->param)
1262 param = conn->param;
1264 /* Perform keepalive. The `hb_context' will be freed automatically
1265 when finally calling the silc_socket_free function. */
1266 hb_context = silc_calloc(1, sizeof(*hb_context));
1267 hb_context->server = server;
1268 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1269 silc_server_perform_heartbeat,
1272 /* Register re-key timeout */
1273 idata->rekey->timeout = param->key_exchange_rekey;
1274 idata->rekey->context = (void *)server;
1275 silc_schedule_task_add(server->schedule, sock->sock,
1276 silc_server_rekey_callback,
1277 (void *)sock, idata->rekey->timeout, 0,
1278 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1280 if (!sconn->backup) {
1281 /* Mark this router our primary router if we're still standalone */
1282 if (server->standalone) {
1283 server->id_entry->router = id_entry;
1284 server->router = id_entry;
1285 server->standalone = FALSE;
1287 /* If we are router then announce our possible servers. Backup
1288 router announces also global servers. */
1289 if (server->server_type == SILC_ROUTER)
1290 silc_server_announce_servers(server,
1291 server->backup_router ? TRUE : FALSE,
1292 0, SILC_PRIMARY_ROUTE(server));
1294 /* Announce our clients and channels to the router */
1295 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1296 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1298 /* If we are backup router then this primary router is whom we are
1300 if (server->server_type == SILC_BACKUP_ROUTER)
1301 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1304 /* Add this server to be our backup router */
1305 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1306 sconn->backup_replace_port, FALSE);
1309 sock->protocol = NULL;
1312 /* Call the completion callback to indicate that we've connected to
1314 if (sconn->callback)
1315 (*sconn->callback)(server, id_entry, sconn->callback_context);
1317 /* Free the temporary connection data context */
1319 silc_server_config_unref(&sconn->conn);
1320 silc_free(sconn->remote_host);
1321 silc_free(sconn->backup_replace_ip);
1324 if (sconn == server->router_conn)
1325 server->router_conn = NULL;
1328 /* Free the protocol object */
1329 if (sock->protocol == protocol)
1330 sock->protocol = NULL;
1331 silc_protocol_free(protocol);
1333 silc_packet_context_free(ctx->packet);
1335 silc_ske_free(ctx->ske);
1336 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1337 silc_free(ctx->auth_data);
1341 /* Host lookup callback that is called after the incoming connection's
1342 IP and FQDN lookup is performed. This will actually check the acceptance
1343 of the incoming connection and will register the key exchange protocol
1344 for this connection. */
1347 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1350 SilcServerKEInternalContext *proto_ctx =
1351 (SilcServerKEInternalContext *)context;
1352 SilcServer server = (SilcServer)proto_ctx->server;
1353 SilcServerConfigClient *cconfig = NULL;
1354 SilcServerConfigServer *sconfig = NULL;
1355 SilcServerConfigRouter *rconfig = NULL;
1356 SilcServerConfigDeny *deny;
1359 context = (void *)server;
1361 /* Check whether we could resolve both IP and FQDN. */
1362 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1363 server->config->require_reverse_lookup)) {
1364 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1365 sock->hostname ? sock->hostname :
1366 sock->ip ? sock->ip : ""));
1367 server->stat.conn_failures++;
1368 silc_server_disconnect_remote(server, sock,
1369 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1370 "Unknown host or IP");
1371 silc_free(proto_ctx);
1375 /* Register the connection for network input and output. This sets
1376 that scheduler will listen for incoming packets for this connection
1377 and sets that outgoing packets may be sent to this connection as well.
1378 However, this doesn't set the scheduler for outgoing traffic, it
1379 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1380 later when outgoing data is available. */
1381 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1383 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1386 /* Listenning port */
1387 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1388 silc_server_disconnect_remote(server, sock,
1389 SILC_STATUS_ERR_RESOURCE_LIMIT,
1390 "Connection refused");
1391 server->stat.conn_failures++;
1392 silc_free(proto_ctx);
1395 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1397 /* Check whether this connection is denied to connect to us. */
1398 deny = silc_server_config_find_denied(server, sock->ip);
1400 deny = silc_server_config_find_denied(server, sock->hostname);
1402 /* The connection is denied */
1403 SILC_LOG_INFO(("Connection %s (%s) is denied",
1404 sock->hostname, sock->ip));
1405 silc_server_disconnect_remote(server, sock,
1406 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1408 server->stat.conn_failures++;
1409 silc_free(proto_ctx);
1413 /* Check whether we have configured this sort of connection at all. We
1414 have to check all configurations since we don't know what type of
1415 connection this is. */
1416 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1417 cconfig = silc_server_config_find_client(server, sock->hostname);
1418 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1419 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1420 if (server->server_type == SILC_ROUTER) {
1421 if (!(rconfig = silc_server_config_find_router_conn(server,
1422 sock->ip, sock->port)))
1423 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1426 if (!cconfig && !sconfig && !rconfig) {
1427 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1429 silc_server_disconnect_remote(server, sock,
1430 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1431 server->stat.conn_failures++;
1432 silc_free(proto_ctx);
1436 /* The connection is allowed */
1438 /* Set internal context for key exchange protocol. This is
1439 sent as context for the protocol. */
1440 proto_ctx->sock = sock;
1441 proto_ctx->rng = server->rng;
1442 proto_ctx->responder = TRUE;
1443 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1444 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1445 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1447 /* Take flags for key exchange. Since we do not know what type of connection
1448 this is, we go through all found configurations and use the global ones
1449 as well. This will result always into strictest key exchange flags. */
1450 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1451 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1452 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1453 if (server->config->param.key_exchange_pfs)
1454 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1456 /* Prepare the connection for key exchange protocol. We allocate the
1457 protocol but will not start it yet. The connector will be the
1458 initiator of the protocol thus we will wait for initiation from
1459 there before we start the protocol. */
1460 server->stat.auth_attempts++;
1461 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1462 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1463 &sock->protocol, proto_ctx,
1464 silc_server_accept_new_connection_second);
1466 /* Register a timeout task that will be executed if the connector
1467 will not start the key exchange protocol within specified timeout
1468 and the connection will be closed. */
1469 proto_ctx->timeout_task =
1470 silc_schedule_task_add(server->schedule, sock->sock,
1471 silc_server_timeout_remote,
1473 server->config->key_exchange_timeout, 0,
1478 /* Accepts new connections to the server. Accepting new connections are
1479 done in three parts to make it async. */
1481 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1483 SilcServer server = (SilcServer)context;
1484 SilcSocketConnection newsocket;
1485 SilcServerKEInternalContext *proto_ctx;
1488 SILC_LOG_DEBUG(("Accepting new connection"));
1490 server->stat.conn_attempts++;
1492 sock = silc_net_accept_connection(fd);
1494 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1495 server->stat.conn_failures++;
1499 /* Check for maximum allowed connections */
1500 if (sock > server->config->param.connections_max) {
1501 SILC_LOG_ERROR(("Refusing connection, server is full"));
1502 server->stat.conn_failures++;
1503 silc_net_close_connection(sock);
1507 /* Set socket options */
1508 silc_net_set_socket_nonblock(sock);
1509 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1511 /* We don't create a ID yet, since we don't know what type of connection
1512 this is yet. But, we do add the connection to the socket table. */
1513 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1514 server->sockets[sock] = newsocket;
1516 /* Perform asynchronous host lookup. This will lookup the IP and the
1517 FQDN of the remote connection. After the lookup is done the connection
1518 is accepted further. */
1519 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1520 proto_ctx->server = server;
1521 proto_ctx->context = (void *)fd;
1522 silc_socket_host_lookup(newsocket, TRUE,
1523 silc_server_accept_new_connection_lookup,
1524 (void *)proto_ctx, server->schedule);
1527 /* Second part of accepting new connection. Key exchange protocol has been
1528 performed and now it is time to do little connection authentication
1529 protocol to figure out whether this connection is client or server
1530 and whether it has right to access this server (especially server
1531 connections needs to be authenticated). */
1533 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1535 SilcProtocol protocol = (SilcProtocol)context;
1536 SilcServerKEInternalContext *ctx =
1537 (SilcServerKEInternalContext *)protocol->context;
1538 SilcServer server = (SilcServer)ctx->server;
1539 SilcSocketConnection sock = ctx->sock;
1540 SilcServerConnAuthInternalContext *proto_ctx;
1542 SILC_LOG_DEBUG(("Start"));
1544 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1545 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1546 /* Error occured during protocol */
1547 SILC_LOG_DEBUG(("Error key exchange protocol"));
1548 silc_protocol_free(protocol);
1549 sock->protocol = NULL;
1550 silc_ske_free_key_material(ctx->keymat);
1552 silc_packet_context_free(ctx->packet);
1554 silc_ske_free(ctx->ske);
1555 silc_free(ctx->dest_id);
1556 silc_server_config_unref(&ctx->cconfig);
1557 silc_server_config_unref(&ctx->sconfig);
1558 silc_server_config_unref(&ctx->rconfig);
1560 silc_schedule_task_del_by_callback(server->schedule,
1561 silc_server_failure_callback);
1562 silc_server_disconnect_remote(server, sock,
1563 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1565 server->stat.auth_failures++;
1569 /* We now have the key material as the result of the key exchange
1570 protocol. Take the key material into use. Free the raw key material
1571 as soon as we've set them into use. */
1572 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1573 ctx->sock, ctx->keymat,
1574 ctx->ske->prop->cipher,
1575 ctx->ske->prop->pkcs,
1576 ctx->ske->prop->hash,
1577 ctx->ske->prop->hmac,
1578 ctx->ske->prop->group,
1580 SILC_LOG_ERROR(("Error setting key material in use"));
1581 silc_protocol_free(protocol);
1582 sock->protocol = NULL;
1583 silc_ske_free_key_material(ctx->keymat);
1585 silc_packet_context_free(ctx->packet);
1587 silc_ske_free(ctx->ske);
1588 silc_free(ctx->dest_id);
1589 silc_server_config_unref(&ctx->cconfig);
1590 silc_server_config_unref(&ctx->sconfig);
1591 silc_server_config_unref(&ctx->rconfig);
1593 silc_schedule_task_del_by_callback(server->schedule,
1594 silc_server_failure_callback);
1595 silc_server_disconnect_remote(server, sock,
1596 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1597 server->stat.auth_failures++;
1600 silc_ske_free_key_material(ctx->keymat);
1602 /* Allocate internal context for the authentication protocol. This
1603 is sent as context for the protocol. */
1604 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1605 proto_ctx->server = (void *)server;
1606 proto_ctx->sock = sock;
1607 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1608 proto_ctx->responder = TRUE;
1609 proto_ctx->dest_id_type = ctx->dest_id_type;
1610 proto_ctx->dest_id = ctx->dest_id;
1611 proto_ctx->cconfig = ctx->cconfig;
1612 proto_ctx->sconfig = ctx->sconfig;
1613 proto_ctx->rconfig = ctx->rconfig;
1615 /* Free old protocol as it is finished now */
1616 silc_protocol_free(protocol);
1618 silc_packet_context_free(ctx->packet);
1620 sock->protocol = NULL;
1622 /* Allocate the authentication protocol. This is allocated here
1623 but we won't start it yet. We will be receiving party of this
1624 protocol thus we will wait that connecting party will make
1625 their first move. */
1626 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1627 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1628 &sock->protocol, proto_ctx,
1629 silc_server_accept_new_connection_final);
1631 /* Register timeout task. If the protocol is not executed inside
1632 this timelimit the connection will be terminated. */
1633 proto_ctx->timeout_task =
1634 silc_schedule_task_add(server->schedule, sock->sock,
1635 silc_server_timeout_remote,
1637 server->config->conn_auth_timeout, 0,
1642 /* After this is called, server don't wait for backup router anymore.
1643 This gets called automatically even after we have backup router
1644 connection established. */
1646 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1648 SilcServer server = context;
1649 server->wait_backup = FALSE;
1652 /* Final part of accepting new connection. The connection has now
1653 been authenticated and keys has been exchanged. We also know whether
1654 this is client or server connection. */
1656 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1658 SilcProtocol protocol = (SilcProtocol)context;
1659 SilcServerConnAuthInternalContext *ctx =
1660 (SilcServerConnAuthInternalContext *)protocol->context;
1661 SilcServer server = (SilcServer)ctx->server;
1662 SilcSocketConnection sock = ctx->sock;
1663 SilcServerHBContext hb_context;
1664 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1666 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1668 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1669 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1670 /* Error occured during protocol */
1671 SILC_LOG_DEBUG(("Error during authentication protocol"));
1672 silc_protocol_free(protocol);
1673 sock->protocol = NULL;
1675 silc_packet_context_free(ctx->packet);
1677 silc_ske_free(ctx->ske);
1678 silc_free(ctx->dest_id);
1679 silc_server_config_unref(&ctx->cconfig);
1680 silc_server_config_unref(&ctx->sconfig);
1681 silc_server_config_unref(&ctx->rconfig);
1683 silc_schedule_task_del_by_callback(server->schedule,
1684 silc_server_failure_callback);
1685 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1687 server->stat.auth_failures++;
1691 entry->data.last_receive = time(NULL);
1693 switch (ctx->conn_type) {
1694 case SILC_SOCKET_TYPE_CLIENT:
1696 SilcClientEntry client;
1697 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1699 /* Verify whether this connection is after all allowed to connect */
1700 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1701 &server->config->param,
1702 conn->param, ctx->ske)) {
1703 server->stat.auth_failures++;
1707 /* If we are primary router and we have backup router configured
1708 but it has not connected to use yet, do not accept any other
1710 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1711 !server->backup_router) {
1712 SilcServerConfigRouter *router;
1713 router = silc_server_config_get_backup_router(server);
1714 if (router && strcmp(server->config->server_info->primary->server_ip,
1716 silc_server_find_socket_by_host(server,
1717 SILC_SOCKET_TYPE_SERVER,
1718 router->backup_replace_ip, 0)) {
1719 SILC_LOG_INFO(("Will not accept connections because we do "
1720 "not have backup router connection established"));
1721 silc_server_disconnect_remote(server, sock,
1722 SILC_STATUS_ERR_PERM_DENIED,
1723 "We do not have connection to backup "
1724 "router established, try later");
1725 silc_free(sock->user_data);
1726 server->stat.auth_failures++;
1728 /* From here on, wait 10 seconds for the backup router to appear. */
1729 silc_schedule_task_add(server->schedule, 0,
1730 silc_server_backup_router_wait,
1731 (void *)server, 10, 0,
1732 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1737 SILC_LOG_DEBUG(("Remote host is client"));
1738 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1741 /* Add the client to the client ID cache. The nickname and Client ID
1742 and other information is created after we have received NEW_CLIENT
1743 packet from client. */
1744 client = silc_idlist_add_client(server->local_list,
1745 NULL, NULL, NULL, NULL, NULL, sock, 0);
1747 SILC_LOG_ERROR(("Could not add new client to cache"));
1748 silc_free(sock->user_data);
1749 silc_server_disconnect_remote(server, sock,
1750 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1751 server->stat.auth_failures++;
1754 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1757 server->stat.my_clients++;
1758 server->stat.clients++;
1759 server->stat.cell_clients++;
1761 /* Get connection parameters */
1763 if (conn->param->keepalive_secs)
1764 hearbeat_timeout = conn->param->keepalive_secs;
1767 id_entry = (void *)client;
1770 case SILC_SOCKET_TYPE_SERVER:
1771 case SILC_SOCKET_TYPE_ROUTER:
1773 SilcServerEntry new_server;
1774 bool initiator = FALSE;
1775 bool backup_local = FALSE;
1776 bool backup_router = FALSE;
1777 char *backup_replace_ip = NULL;
1778 SilcUInt16 backup_replace_port = 0;
1779 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1780 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1782 /* If we are backup router and this is incoming server connection
1783 and we do not have connection to primary router, do not allow
1785 if (server->server_type == SILC_BACKUP_ROUTER &&
1786 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1787 !SILC_PRIMARY_ROUTE(server)) {
1788 SILC_LOG_INFO(("Will not accept server connection because we do "
1789 "not have primary router connection established"));
1790 silc_server_disconnect_remote(server, sock,
1791 SILC_STATUS_ERR_PERM_DENIED,
1792 "We do not have connection to primary "
1793 "router established, try later");
1794 silc_free(sock->user_data);
1795 server->stat.auth_failures++;
1799 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1800 /* Verify whether this connection is after all allowed to connect */
1801 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1802 &server->config->param,
1803 rconn ? rconn->param : NULL,
1805 silc_free(sock->user_data);
1806 server->stat.auth_failures++;
1812 if (rconn->param->keepalive_secs)
1813 hearbeat_timeout = rconn->param->keepalive_secs;
1816 initiator = rconn->initiator;
1817 backup_local = rconn->backup_local;
1818 backup_router = rconn->backup_router;
1819 backup_replace_ip = rconn->backup_replace_ip;
1820 backup_replace_port = rconn->backup_replace_port;
1824 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1825 /* Verify whether this connection is after all allowed to connect */
1826 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1827 &server->config->param,
1828 sconn ? sconn->param : NULL,
1830 silc_free(sock->user_data);
1831 server->stat.auth_failures++;
1836 if (sconn->param->keepalive_secs)
1837 hearbeat_timeout = sconn->param->keepalive_secs;
1840 backup_router = sconn->backup_router;
1844 /* If we are primary router and we have backup router configured
1845 but it has not connected to use yet, do not accept any other
1847 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1848 !server->backup_router && !backup_router) {
1849 SilcServerConfigRouter *router;
1850 router = silc_server_config_get_backup_router(server);
1851 if (router && strcmp(server->config->server_info->primary->server_ip,
1853 silc_server_find_socket_by_host(server,
1854 SILC_SOCKET_TYPE_SERVER,
1855 router->backup_replace_ip, 0)) {
1856 SILC_LOG_INFO(("Will not accept connections because we do "
1857 "not have backup router connection established"));
1858 silc_server_disconnect_remote(server, sock,
1859 SILC_STATUS_ERR_PERM_DENIED,
1860 "We do not have connection to backup "
1861 "router established, try later");
1862 silc_free(sock->user_data);
1863 server->stat.auth_failures++;
1865 /* From here on, wait 10 seconds for the backup router to appear. */
1866 silc_schedule_task_add(server->schedule, 0,
1867 silc_server_backup_router_wait,
1868 (void *)server, 10, 0,
1869 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1874 SILC_LOG_DEBUG(("Remote host is %s",
1875 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1876 "server" : (backup_router ?
1877 "backup router" : "router")));
1878 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1879 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1880 "server" : (backup_router ?
1881 "backup router" : "router")));
1883 /* Add the server into server cache. The server name and Server ID
1884 is updated after we have received NEW_SERVER packet from the
1885 server. We mark ourselves as router for this server if we really
1888 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1889 server->local_list : (backup_router ?
1890 server->local_list :
1891 server->global_list)),
1893 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1894 SILC_SERVER : SILC_ROUTER),
1896 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1897 server->id_entry : (backup_router ?
1898 server->id_entry : NULL)),
1901 SILC_LOG_ERROR(("Could not add new server to cache"));
1902 silc_free(sock->user_data);
1903 silc_server_disconnect_remote(server, sock,
1904 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1905 server->stat.auth_failures++;
1908 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1910 id_entry = (void *)new_server;
1912 /* If the incoming connection is router and marked as backup router
1913 then add it to be one of our backups */
1914 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1915 /* Change it back to SERVER type since that's what it really is. */
1917 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1918 new_server->server_type = SILC_BACKUP_ROUTER;
1920 /* Remove the backup waiting with timeout */
1921 silc_schedule_task_add(server->schedule, 0,
1922 silc_server_backup_router_wait,
1923 (void *)server, 5, 0,
1924 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1928 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1929 server->stat.my_servers++;
1931 server->stat.my_routers++;
1932 server->stat.routers++;
1934 server->stat.servers++;
1936 /* Check whether this connection is to be our primary router connection
1937 if we do not already have the primary route. */
1938 if (!backup_router &&
1939 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1940 if (silc_server_config_is_primary_route(server) && !initiator)
1943 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1944 server->standalone = FALSE;
1945 if (!server->id_entry->router) {
1946 server->id_entry->router = id_entry;
1947 server->router = id_entry;
1958 sock->type = ctx->conn_type;
1960 /* Add the common data structure to the ID entry. */
1961 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1963 /* Add to sockets internal pointer for fast referencing */
1964 silc_free(sock->user_data);
1965 sock->user_data = id_entry;
1967 /* Connection has been fully established now. Everything is ok. */
1968 SILC_LOG_DEBUG(("New connection authenticated"));
1970 /* Perform keepalive. The `hb_context' will be freed automatically
1971 when finally calling the silc_socket_free function. */
1972 hb_context = silc_calloc(1, sizeof(*hb_context));
1973 hb_context->server = server;
1974 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1975 silc_server_perform_heartbeat,
1979 silc_schedule_task_del_by_callback(server->schedule,
1980 silc_server_failure_callback);
1981 silc_protocol_free(protocol);
1983 silc_packet_context_free(ctx->packet);
1985 silc_ske_free(ctx->ske);
1986 silc_free(ctx->dest_id);
1987 silc_server_config_unref(&ctx->cconfig);
1988 silc_server_config_unref(&ctx->sconfig);
1989 silc_server_config_unref(&ctx->rconfig);
1991 sock->protocol = NULL;
1994 /* This function is used to read packets from network and send packets to
1995 network. This is usually a generic task. */
1997 SILC_TASK_CALLBACK(silc_server_packet_process)
1999 SilcServer server = (SilcServer)context;
2000 SilcSocketConnection sock = server->sockets[fd];
2001 SilcIDListData idata;
2002 SilcCipher cipher = NULL;
2003 SilcHmac hmac = NULL;
2004 SilcUInt32 sequence = 0;
2008 SILC_LOG_DEBUG(("Unknown socket connection"));
2012 /* Packet sending */
2014 if (type == SILC_TASK_WRITE) {
2015 /* Do not send data to disconnected connection */
2016 if (SILC_IS_DISCONNECTED(sock)) {
2017 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2021 server->stat.packets_sent++;
2023 /* Send the packet */
2024 ret = silc_packet_send(sock, TRUE);
2026 /* If returned -2 could not write to connection now, will do
2032 SILC_LOG_ERROR(("Error sending packet to connection "
2033 "%s:%d [%s]", sock->hostname, sock->port,
2034 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2035 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2036 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2041 /* The packet has been sent and now it is time to set the connection
2042 back to only for input. When there is again some outgoing data
2043 available for this connection it will be set for output as well.
2044 This call clears the output setting and sets it only for input. */
2045 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2046 SILC_UNSET_OUTBUF_PENDING(sock);
2048 silc_buffer_clear(sock->outbuf);
2052 /* Packet receiving */
2054 /* Read some data from connection */
2055 ret = silc_packet_receive(sock);
2059 SILC_LOG_ERROR(("Error receiving packet from connection "
2060 "%s:%d [%s] %s", sock->hostname, sock->port,
2061 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2062 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2063 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2064 "Router"), strerror(errno)));
2070 SILC_LOG_DEBUG(("Read EOF"));
2072 /* If connection is disconnecting already we will finally
2073 close the connection */
2074 if (SILC_IS_DISCONNECTING(sock)) {
2075 if (sock->user_data)
2076 silc_server_free_sock_user_data(server, sock, NULL);
2077 silc_server_close_connection(server, sock);
2081 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2082 SILC_SET_DISCONNECTING(sock);
2084 if (sock->user_data) {
2086 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2087 silc_server_free_sock_user_data(server, sock, tmp);
2089 silc_server_free_sock_user_data(server, sock, NULL);
2090 } else if (server->router_conn && server->router_conn->sock == sock &&
2091 !server->router && server->standalone)
2092 silc_schedule_task_add(server->schedule, 0,
2093 silc_server_connect_to_router,
2096 SILC_TASK_PRI_NORMAL);
2098 silc_server_close_connection(server, sock);
2102 /* If connection is disconnecting or disconnected we will ignore
2104 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2105 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2109 /* Get keys and stuff from ID entry */
2110 idata = (SilcIDListData)sock->user_data;
2112 cipher = idata->receive_key;
2113 hmac = idata->hmac_receive;
2114 sequence = idata->psn_receive;
2117 /* Process the packet. This will call the parser that will then
2118 decrypt and parse the packet. */
2119 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2120 TRUE : FALSE, cipher, hmac, sequence,
2121 silc_server_packet_parse, server);
2123 /* If this socket connection is not authenticated yet and the packet
2124 processing failed we will drop the connection since it can be
2125 a malicious flooder. */
2126 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2127 (!sock->protocol || sock->protocol->protocol->type ==
2128 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2129 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2130 SILC_SET_DISCONNECTING(sock);
2132 if (sock->user_data)
2133 silc_server_free_sock_user_data(server, sock, NULL);
2134 silc_server_close_connection(server, sock);
2138 /* Parses whole packet, received earlier. */
2140 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2142 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2143 SilcServer server = (SilcServer)parse_ctx->context;
2144 SilcSocketConnection sock = parse_ctx->sock;
2145 SilcPacketContext *packet = parse_ctx->packet;
2146 SilcIDListData idata = (SilcIDListData)sock->user_data;
2149 server->stat.packets_received++;
2151 /* Parse the packet */
2152 if (parse_ctx->normal)
2153 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2155 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2157 /* If entry is disabled ignore what we got. */
2158 if (ret != SILC_PACKET_RESUME_ROUTER &&
2159 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2160 SILC_LOG_DEBUG(("Connection is disabled"));
2163 if (ret != SILC_PACKET_HEARTBEAT &&
2164 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2165 SILC_LOG_DEBUG(("Connection is disabled"));
2169 if (ret == SILC_PACKET_NONE) {
2170 SILC_LOG_DEBUG(("Error parsing packet"));
2174 /* Check that the the current client ID is same as in the client's packet. */
2175 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2176 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2177 if (client && client->id && packet->src_id) {
2178 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2179 packet->src_id_type);
2180 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2182 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2189 if (server->server_type == SILC_ROUTER) {
2190 /* Route the packet if it is not destined to us. Other ID types but
2191 server are handled separately after processing them. */
2192 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2193 packet->dst_id_type == SILC_ID_SERVER &&
2194 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2195 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2197 /* Route the packet to fastest route for the destination ID */
2198 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2199 packet->dst_id_type);
2202 silc_server_packet_route(server,
2203 silc_server_route_get(server, id,
2204 packet->dst_id_type),
2211 /* Parse the incoming packet type */
2212 silc_server_packet_parse_type(server, sock, packet);
2214 /* Broadcast packet if it is marked as broadcast packet and it is
2215 originated from router and we are router. */
2216 if (server->server_type == SILC_ROUTER &&
2217 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2218 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2219 /* Broadcast to our primary route */
2220 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2222 /* If we have backup routers then we need to feed all broadcast
2223 data to those servers. */
2224 silc_server_backup_broadcast(server, sock, packet);
2228 silc_packet_context_free(packet);
2229 silc_free(parse_ctx);
2232 /* Parser callback called by silc_packet_receive_process. This merely
2233 registers timeout that will handle the actual parsing when appropriate. */
2235 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2238 SilcServer server = (SilcServer)context;
2239 SilcSocketConnection sock = parser_context->sock;
2240 SilcIDListData idata = (SilcIDListData)sock->user_data;
2243 idata->psn_receive = parser_context->packet->sequence + 1;
2245 /* If protocol for this connection is key exchange or rekey then we'll
2246 process all packets synchronously, since there might be packets in
2247 queue that we are not able to decrypt without first processing the
2248 packets before them. */
2249 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2250 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2251 (sock->protocol && sock->protocol->protocol &&
2252 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2253 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2254 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2257 /* Reprocess data since we'll return FALSE here. This is because
2258 the idata->receive_key might have become valid in the last packet
2259 and we want to call this processor with valid cipher. */
2261 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2262 TRUE : FALSE, idata->receive_key,
2263 idata->hmac_receive, idata->psn_receive,
2264 silc_server_packet_parse, server);
2266 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2267 TRUE : FALSE, NULL, NULL, 0,
2268 silc_server_packet_parse, server);
2272 switch (sock->type) {
2273 case SILC_SOCKET_TYPE_UNKNOWN:
2274 case SILC_SOCKET_TYPE_CLIENT:
2275 /* Parse the packet with timeout */
2276 silc_schedule_task_add(server->schedule, sock->sock,
2277 silc_server_packet_parse_real,
2278 (void *)parser_context, 0, 100000,
2280 SILC_TASK_PRI_NORMAL);
2282 case SILC_SOCKET_TYPE_SERVER:
2283 case SILC_SOCKET_TYPE_ROUTER:
2284 /* Packets from servers are parsed immediately */
2285 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2295 /* Parses the packet type and calls what ever routines the packet type
2296 requires. This is done for all incoming packets. */
2298 void silc_server_packet_parse_type(SilcServer server,
2299 SilcSocketConnection sock,
2300 SilcPacketContext *packet)
2302 SilcPacketType type = packet->type;
2303 SilcIDListData idata = (SilcIDListData)sock->user_data;
2305 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2306 silc_get_packet_name(type), packet->flags));
2308 /* Parse the packet type */
2310 case SILC_PACKET_DISCONNECT:
2313 char *message = NULL;
2315 if (packet->flags & SILC_PACKET_FLAG_LIST)
2317 if (packet->buffer->len < 1)
2320 status = (SilcStatus)packet->buffer->data[0];
2321 if (packet->buffer->len > 1 &&
2322 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2323 message = silc_memdup(packet->buffer->data + 1,
2324 packet->buffer->len - 1);
2326 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2327 sock->ip, sock->hostname,
2328 silc_get_status_message(status), status,
2329 message ? message : ""));
2332 /* Handle the disconnection from our end too */
2333 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2334 silc_server_free_sock_user_data(server, sock, NULL);
2335 silc_server_close_connection(server, sock);
2339 case SILC_PACKET_SUCCESS:
2341 * Success received for something. For now we can have only
2342 * one protocol for connection executing at once hence this
2343 * success message is for whatever protocol is executing currently.
2345 if (packet->flags & SILC_PACKET_FLAG_LIST)
2348 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2351 case SILC_PACKET_FAILURE:
2353 * Failure received for something. For now we can have only
2354 * one protocol for connection executing at once hence this
2355 * failure message is for whatever protocol is executing currently.
2357 if (packet->flags & SILC_PACKET_FLAG_LIST)
2359 if (sock->protocol) {
2360 SilcServerFailureContext f;
2361 f = silc_calloc(1, sizeof(*f));
2365 /* We will wait 5 seconds to process this failure packet */
2366 silc_schedule_task_add(server->schedule, sock->sock,
2367 silc_server_failure_callback, (void *)f, 5, 0,
2368 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2372 case SILC_PACKET_REJECT:
2373 if (packet->flags & SILC_PACKET_FLAG_LIST)
2378 case SILC_PACKET_NOTIFY:
2380 * Received notify packet. Server can receive notify packets from
2381 * router. Server then relays the notify messages to clients if needed.
2383 if (packet->flags & SILC_PACKET_FLAG_LIST)
2384 silc_server_notify_list(server, sock, packet);
2386 silc_server_notify(server, sock, packet);
2392 case SILC_PACKET_CHANNEL_MESSAGE:
2394 * Received channel message. Channel messages are special packets
2395 * (although probably most common ones) thus they are handled
2398 if (packet->flags & SILC_PACKET_FLAG_LIST)
2400 idata->last_receive = time(NULL);
2401 silc_server_channel_message(server, sock, packet);
2404 case SILC_PACKET_CHANNEL_KEY:
2406 * Received key for channel. As channels are created by the router
2407 * the keys are as well. We will distribute the key to all of our
2408 * locally connected clients on the particular channel. Router
2409 * never receives this channel and thus is ignored.
2411 if (packet->flags & SILC_PACKET_FLAG_LIST)
2413 silc_server_channel_key(server, sock, packet);
2419 case SILC_PACKET_COMMAND:
2421 * Recived command. Processes the command request and allocates the
2422 * command context and calls the command.
2424 if (packet->flags & SILC_PACKET_FLAG_LIST)
2426 silc_server_command_process(server, sock, packet);
2429 case SILC_PACKET_COMMAND_REPLY:
2431 * Received command reply packet. Received command reply to command. It
2432 * may be reply to command sent by us or reply to command sent by client
2433 * that we've routed further.
2435 if (packet->flags & SILC_PACKET_FLAG_LIST)
2437 silc_server_command_reply(server, sock, packet);
2441 * Private Message packets
2443 case SILC_PACKET_PRIVATE_MESSAGE:
2445 * Received private message packet. The packet is coming from either
2448 if (packet->flags & SILC_PACKET_FLAG_LIST)
2450 idata->last_receive = time(NULL);
2451 silc_server_private_message(server, sock, packet);
2454 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2456 * Private message key packet.
2458 if (packet->flags & SILC_PACKET_FLAG_LIST)
2460 silc_server_private_message_key(server, sock, packet);
2464 * Key Exchange protocol packets
2466 case SILC_PACKET_KEY_EXCHANGE:
2467 if (packet->flags & SILC_PACKET_FLAG_LIST)
2470 if (sock->protocol && sock->protocol->protocol &&
2471 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2472 SilcServerKEInternalContext *proto_ctx =
2473 (SilcServerKEInternalContext *)sock->protocol->context;
2475 proto_ctx->packet = silc_packet_context_dup(packet);
2477 /* Let the protocol handle the packet */
2478 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2480 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2481 "protocol active, packet dropped."));
2485 case SILC_PACKET_KEY_EXCHANGE_1:
2486 if (packet->flags & SILC_PACKET_FLAG_LIST)
2489 if (sock->protocol && sock->protocol->protocol &&
2490 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2491 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2493 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2494 SilcServerRekeyInternalContext *proto_ctx =
2495 (SilcServerRekeyInternalContext *)sock->protocol->context;
2497 if (proto_ctx->packet)
2498 silc_packet_context_free(proto_ctx->packet);
2500 proto_ctx->packet = silc_packet_context_dup(packet);
2502 /* Let the protocol handle the packet */
2503 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2505 SilcServerKEInternalContext *proto_ctx =
2506 (SilcServerKEInternalContext *)sock->protocol->context;
2508 if (proto_ctx->packet)
2509 silc_packet_context_free(proto_ctx->packet);
2511 proto_ctx->packet = silc_packet_context_dup(packet);
2512 proto_ctx->dest_id_type = packet->src_id_type;
2513 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2514 packet->src_id_type);
2515 if (!proto_ctx->dest_id)
2518 /* Let the protocol handle the packet */
2519 silc_protocol_execute(sock->protocol, server->schedule,
2523 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2524 "protocol active, packet dropped."));
2528 case SILC_PACKET_KEY_EXCHANGE_2:
2529 if (packet->flags & SILC_PACKET_FLAG_LIST)
2532 if (sock->protocol && sock->protocol->protocol &&
2533 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2534 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2536 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2537 SilcServerRekeyInternalContext *proto_ctx =
2538 (SilcServerRekeyInternalContext *)sock->protocol->context;
2540 if (proto_ctx->packet)
2541 silc_packet_context_free(proto_ctx->packet);
2543 proto_ctx->packet = silc_packet_context_dup(packet);
2545 /* Let the protocol handle the packet */
2546 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2548 SilcServerKEInternalContext *proto_ctx =
2549 (SilcServerKEInternalContext *)sock->protocol->context;
2551 if (proto_ctx->packet)
2552 silc_packet_context_free(proto_ctx->packet);
2554 proto_ctx->packet = silc_packet_context_dup(packet);
2555 proto_ctx->dest_id_type = packet->src_id_type;
2556 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2557 packet->src_id_type);
2558 if (!proto_ctx->dest_id)
2561 /* Let the protocol handle the packet */
2562 silc_protocol_execute(sock->protocol, server->schedule,
2566 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2567 "protocol active, packet dropped."));
2571 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2573 * Connection authentication request packet. When we receive this packet
2574 * we will send to the other end information about our mandatory
2575 * authentication method for the connection. This packet maybe received
2578 if (packet->flags & SILC_PACKET_FLAG_LIST)
2580 silc_server_connection_auth_request(server, sock, packet);
2584 * Connection Authentication protocol packets
2586 case SILC_PACKET_CONNECTION_AUTH:
2587 /* Start of the authentication protocol. We receive here the
2588 authentication data and will verify it. */
2589 if (packet->flags & SILC_PACKET_FLAG_LIST)
2592 if (sock->protocol && sock->protocol->protocol->type
2593 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2595 SilcServerConnAuthInternalContext *proto_ctx =
2596 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2598 proto_ctx->packet = silc_packet_context_dup(packet);
2600 /* Let the protocol handle the packet */
2601 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2603 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2604 "protocol active, packet dropped."));
2608 case SILC_PACKET_NEW_ID:
2610 * Received New ID packet. This includes some new ID that has been
2611 * created. It may be for client, server or channel. This is the way
2612 * to distribute information about new registered entities in the
2615 if (packet->flags & SILC_PACKET_FLAG_LIST)
2616 silc_server_new_id_list(server, sock, packet);
2618 silc_server_new_id(server, sock, packet);
2621 case SILC_PACKET_NEW_CLIENT:
2623 * Received new client packet. This includes client information that
2624 * we will use to create initial client ID. After creating new
2625 * ID we will send it to the client.
2627 if (packet->flags & SILC_PACKET_FLAG_LIST)
2629 silc_server_new_client(server, sock, packet);
2632 case SILC_PACKET_NEW_SERVER:
2634 * Received new server packet. This includes Server ID and some other
2635 * information that we may save. This is received after server has
2638 if (packet->flags & SILC_PACKET_FLAG_LIST)
2640 silc_server_new_server(server, sock, packet);
2643 case SILC_PACKET_NEW_CHANNEL:
2645 * Received new channel packet. Information about new channel in the
2646 * network are distributed using this packet.
2648 if (packet->flags & SILC_PACKET_FLAG_LIST)
2649 silc_server_new_channel_list(server, sock, packet);
2651 silc_server_new_channel(server, sock, packet);
2654 case SILC_PACKET_HEARTBEAT:
2656 * Received heartbeat.
2658 if (packet->flags & SILC_PACKET_FLAG_LIST)
2662 case SILC_PACKET_KEY_AGREEMENT:
2664 * Received heartbeat.
2666 if (packet->flags & SILC_PACKET_FLAG_LIST)
2668 silc_server_key_agreement(server, sock, packet);
2671 case SILC_PACKET_REKEY:
2673 * Received re-key packet. The sender wants to regenerate the session
2676 if (packet->flags & SILC_PACKET_FLAG_LIST)
2678 silc_server_rekey(server, sock, packet);
2681 case SILC_PACKET_REKEY_DONE:
2683 * The re-key is done.
2685 if (packet->flags & SILC_PACKET_FLAG_LIST)
2688 if (sock->protocol && sock->protocol->protocol &&
2689 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2691 SilcServerRekeyInternalContext *proto_ctx =
2692 (SilcServerRekeyInternalContext *)sock->protocol->context;
2694 if (proto_ctx->packet)
2695 silc_packet_context_free(proto_ctx->packet);
2697 proto_ctx->packet = silc_packet_context_dup(packet);
2699 /* Let the protocol handle the packet */
2700 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2702 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2703 "protocol active, packet dropped."));
2707 case SILC_PACKET_FTP:
2709 if (packet->flags & SILC_PACKET_FLAG_LIST)
2711 silc_server_ftp(server, sock, packet);
2714 case SILC_PACKET_RESUME_CLIENT:
2716 if (packet->flags & SILC_PACKET_FLAG_LIST)
2718 silc_server_resume_client(server, sock, packet);
2721 case SILC_PACKET_RESUME_ROUTER:
2722 /* Resume router packet received. This packet is received for backup
2723 router resuming protocol. */
2724 if (packet->flags & SILC_PACKET_FLAG_LIST)
2726 silc_server_backup_resume_router(server, sock, packet);
2730 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2735 /* Creates connection to a remote router. */
2737 void silc_server_create_connection(SilcServer server,
2738 const char *remote_host, SilcUInt32 port)
2740 SilcServerConnection sconn;
2742 /* Allocate connection object for hold connection specific stuff. */
2743 sconn = silc_calloc(1, sizeof(*sconn));
2744 sconn->server = server;
2745 sconn->remote_host = strdup(remote_host);
2746 sconn->remote_port = port;
2747 sconn->no_reconnect = TRUE;
2749 silc_schedule_task_add(server->schedule, 0,
2750 silc_server_connect_router,
2751 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2752 SILC_TASK_PRI_NORMAL);
2755 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2757 silc_socket_free(context);
2760 /* Closes connection to socket connection */
2762 void silc_server_close_connection(SilcServer server,
2763 SilcSocketConnection sock)
2767 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2768 silc_schedule_task_add(server->schedule, 0,
2769 silc_server_close_connection_final,
2770 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2771 SILC_TASK_PRI_NORMAL);
2775 memset(tmp, 0, sizeof(tmp));
2776 silc_socket_get_error(sock, tmp, sizeof(tmp));
2777 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", sock->hostname,
2779 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2780 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2781 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2782 "Router"), tmp[0] ? tmp : ""));
2784 /* We won't listen for this connection anymore */
2785 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2787 /* Unregister all tasks */
2788 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2790 /* Close the actual connection */
2791 silc_net_close_connection(sock->sock);
2792 server->sockets[sock->sock] = NULL;
2794 /* If sock->user_data is NULL then we'll check for active protocols
2795 here since the silc_server_free_sock_user_data has not been called
2796 for this connection. */
2797 if (!sock->user_data) {
2798 /* If any protocol is active cancel its execution. It will call
2799 the final callback which will finalize the disconnection. */
2800 if (sock->protocol) {
2801 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2802 silc_protocol_cancel(sock->protocol, server->schedule);
2803 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2804 silc_protocol_execute_final(sock->protocol, server->schedule);
2805 sock->protocol = NULL;
2810 silc_schedule_task_add(server->schedule, 0,
2811 silc_server_close_connection_final,
2812 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2813 SILC_TASK_PRI_NORMAL);
2816 /* Sends disconnect message to remote connection and disconnects the
2819 void silc_server_disconnect_remote(SilcServer server,
2820 SilcSocketConnection sock,
2821 SilcStatus status, ...)
2824 unsigned char buf[512];
2832 memset(buf, 0, sizeof(buf));
2833 va_start(ap, status);
2834 cp = va_arg(ap, char *);
2836 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2841 SILC_LOG_DEBUG(("Disconnecting remote host"));
2843 /* Notify remote end that the conversation is over. The notify message
2844 is tried to be sent immediately. */
2848 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2850 buffer = silc_buffer_alloc_size(len);
2854 buffer->data[0] = status;
2856 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2858 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2859 buffer->data, buffer->len, TRUE);
2860 silc_buffer_free(buffer);
2863 silc_server_packet_queue_purge(server, sock);
2865 /* Mark the connection to be disconnected */
2866 SILC_SET_DISCONNECTED(sock);
2867 silc_server_close_connection(server, sock);
2872 SilcClientEntry client;
2873 } *FreeClientInternal;
2875 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2877 FreeClientInternal i = (FreeClientInternal)context;
2879 assert(!silc_hash_table_count(i->client->channels));
2881 silc_idlist_del_data(i->client);
2882 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2886 /* Frees client data and notifies about client's signoff. */
2888 void silc_server_free_client_data(SilcServer server,
2889 SilcSocketConnection sock,
2890 SilcClientEntry client,
2892 const char *signoff)
2894 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2896 SILC_LOG_DEBUG(("Freeing client data"));
2899 if (!client->router && !client->connection &&
2900 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2901 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2902 SILC_LOG_ERROR(("****** Contact Pekka"));
2903 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2908 /* If there is pending outgoing data for the client then purge it
2909 to the network before removing the client entry. */
2910 silc_server_packet_queue_purge(server, sock);
2913 /* Check if anyone is watching this nickname */
2914 if (server->server_type == SILC_ROUTER)
2915 silc_server_check_watcher_list(server, client, NULL,
2916 SILC_NOTIFY_TYPE_SIGNOFF);
2918 /* Send SIGNOFF notify to routers. */
2920 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2921 SILC_BROADCAST(server), client->id,
2925 /* Remove client from all channels */
2927 silc_server_remove_from_channels(server, NULL, client,
2928 TRUE, (char *)signoff, TRUE);
2930 silc_server_remove_from_channels(server, NULL, client,
2931 FALSE, NULL, FALSE);
2933 /* Remove this client from watcher list if it is */
2934 silc_server_del_from_watcher_list(server, client);
2936 /* Update statistics */
2937 server->stat.my_clients--;
2938 server->stat.clients--;
2939 if (server->stat.cell_clients)
2940 server->stat.cell_clients--;
2941 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2942 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2943 silc_schedule_task_del_by_context(server->schedule, client);
2945 /* We will not delete the client entry right away. We will take it
2946 into history (for WHOWAS command) for 5 minutes */
2949 silc_schedule_task_add(server->schedule, 0,
2950 silc_server_free_client_data_timeout,
2952 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2953 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2954 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
2956 client->router = NULL;
2957 client->connection = NULL;
2960 /* Frees user_data pointer from socket connection object. This also sends
2961 appropriate notify packets to the network to inform about leaving
2964 void silc_server_free_sock_user_data(SilcServer server,
2965 SilcSocketConnection sock,
2966 const char *signoff_message)
2968 switch (sock->type) {
2969 case SILC_SOCKET_TYPE_CLIENT:
2971 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2972 silc_server_free_client_data(server, sock, user_data, TRUE,
2976 case SILC_SOCKET_TYPE_SERVER:
2977 case SILC_SOCKET_TYPE_ROUTER:
2979 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2980 SilcServerEntry backup_router = NULL;
2982 SILC_LOG_DEBUG(("Freeing server data"));
2985 backup_router = silc_server_backup_get(server, user_data->id);
2987 if (!server->backup_router && server->server_type == SILC_ROUTER &&
2988 backup_router == server->id_entry &&
2989 sock->type != SILC_SOCKET_TYPE_ROUTER)
2990 backup_router = NULL;
2992 /* If this was our primary router connection then we're lost to
2993 the outside world. */
2994 if (server->router == user_data) {
2995 /* Check whether we have a backup router connection */
2996 if (!backup_router || backup_router == user_data) {
2997 silc_schedule_task_add(server->schedule, 0,
2998 silc_server_connect_to_router,
3001 SILC_TASK_PRI_NORMAL);
3003 server->id_entry->router = NULL;
3004 server->router = NULL;
3005 server->standalone = TRUE;
3006 backup_router = NULL;
3008 if (server->id_entry != backup_router) {
3009 SILC_LOG_INFO(("New primary router is backup router %s",
3010 backup_router->server_name));
3011 server->id_entry->router = backup_router;
3012 server->router = backup_router;
3013 server->router_connect = time(0);
3014 server->backup_primary = TRUE;
3016 SILC_LOG_INFO(("We are now new primary router in this cell"));
3017 server->id_entry->router = NULL;
3018 server->router = NULL;
3019 server->standalone = TRUE;
3021 /* We stop here to take a breath */
3025 if (server->server_type == SILC_BACKUP_ROUTER) {
3026 server->server_type = SILC_ROUTER;
3028 /* We'll need to constantly try to reconnect to the primary
3029 router so that we'll see when it comes back online. */
3030 silc_server_backup_reconnect(server, sock->ip, sock->port,
3031 silc_server_backup_connected,
3035 /* Mark this connection as replaced */
3036 silc_server_backup_replaced_add(server, user_data->id,
3039 } else if (backup_router) {
3040 SILC_LOG_INFO(("Enabling the use of backup router %s",
3041 backup_router->server_name));
3042 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3043 backup_router->server_name));
3045 /* Mark this connection as replaced */
3046 silc_server_backup_replaced_add(server, user_data->id,
3050 if (!backup_router) {
3051 /* Remove all servers that are originated from this server, and
3052 remove the clients of those servers too. */
3053 silc_server_remove_servers_by_server(server, user_data, TRUE);
3055 /* Remove the clients that this server owns as they will become
3057 silc_server_remove_clients_by_server(server, user_data,
3060 /* Remove channels owned by this server */
3061 if (server->server_type == SILC_SERVER)
3062 silc_server_remove_channels_by_server(server, user_data);
3064 /* Enable local server connections that may be disabled */
3065 silc_server_local_servers_toggle_enabled(server, TRUE);
3067 /* Update the client entries of this server to the new backup
3068 router. If we are the backup router we also resolve the real
3069 servers for the clients. After updating is over this also
3070 removes the clients that this server explicitly owns. */
3071 silc_server_update_clients_by_server(server, user_data,
3072 backup_router, TRUE);
3074 /* If we are router and just lost our primary router (now standlaone)
3075 we remove everything that was behind it, since we don't know
3077 if (server->server_type == SILC_ROUTER && server->standalone)
3078 /* Remove all servers that are originated from this server, and
3079 remove the clients of those servers too. */
3080 silc_server_remove_servers_by_server(server, user_data, TRUE);
3082 /* Finally remove the clients that are explicitly owned by this
3083 server. They go down with the server. */
3084 silc_server_remove_clients_by_server(server, user_data,
3087 /* Update our server cache to use the new backup router too. */
3088 silc_server_update_servers_by_server(server, user_data, backup_router);
3089 if (server->server_type == SILC_SERVER)
3090 silc_server_update_channels_by_server(server, user_data,
3093 /* Send notify about primary router going down to local operators */
3094 if (server->backup_router)
3095 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3096 SILC_NOTIFY_TYPE_NONE,
3097 ("%s switched to backup router %s "
3098 "(we are primary router now)",
3099 server->server_name, server->server_name));
3100 else if (server->router)
3101 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3102 SILC_NOTIFY_TYPE_NONE,
3103 ("%s switched to backup router %s",
3104 server->server_name,
3105 server->router->server_name));
3108 /* Free the server entry */
3109 silc_server_backup_del(server, user_data);
3110 silc_server_backup_replaced_del(server, user_data);
3111 silc_idlist_del_data(user_data);
3112 if (!silc_idlist_del_server(server->local_list, user_data))
3113 silc_idlist_del_server(server->global_list, user_data);
3114 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3115 server->stat.my_servers--;
3117 server->stat.my_routers--;
3118 server->stat.routers--;
3120 server->stat.servers--;
3121 if (server->server_type == SILC_ROUTER)
3122 server->stat.cell_servers--;
3124 if (backup_router && backup_router != server->id_entry) {
3125 /* Announce all of our stuff that was created about 5 minutes ago.
3126 The backup router knows all the other stuff already. */
3127 if (server->server_type == SILC_ROUTER)
3128 silc_server_announce_servers(server, FALSE, time(0) - 300,
3129 backup_router->connection);
3131 /* Announce our clients and channels to the router */
3132 silc_server_announce_clients(server, time(0) - 300,
3133 backup_router->connection);
3134 silc_server_announce_channels(server, time(0) - 300,
3135 backup_router->connection);
3141 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3143 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3145 silc_idlist_del_data(user_data);
3146 silc_free(user_data);
3151 /* If any protocol is active cancel its execution */
3152 if (sock->protocol) {
3153 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3154 silc_protocol_cancel(sock->protocol, server->schedule);
3155 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3156 silc_protocol_execute_final(sock->protocol, server->schedule);
3157 sock->protocol = NULL;
3160 sock->user_data = NULL;
3163 /* Removes client from all channels it has joined. This is used when client
3164 connection is disconnected. If the client on a channel is last, the
3165 channel is removed as well. This sends the SIGNOFF notify types. */
3167 void silc_server_remove_from_channels(SilcServer server,
3168 SilcSocketConnection sock,
3169 SilcClientEntry client,
3171 const char *signoff_message,
3174 SilcChannelEntry channel;
3175 SilcChannelClientEntry chl;
3176 SilcHashTableList htl;
3177 SilcBuffer clidp = NULL;
3182 SILC_LOG_DEBUG(("Removing client from joined channels"));
3184 if (notify && !client->id)
3188 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3193 /* Remove the client from all channels. The client is removed from
3194 the channels' user list. */
3195 silc_hash_table_list(client->channels, &htl);
3196 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3197 channel = chl->channel;
3199 /* Remove channel if this is last client leaving the channel, unless
3200 the channel is permanent. */
3201 if (server->server_type != SILC_SERVER &&
3202 silc_hash_table_count(channel->user_list) < 2) {
3203 silc_server_channel_delete(server, channel);
3207 silc_hash_table_del(client->channels, channel);
3208 silc_hash_table_del(channel->user_list, chl->client);
3209 channel->user_count--;
3211 /* If there is no global users on the channel anymore mark the channel
3212 as local channel. Do not check if the removed client is local client. */
3213 if (server->server_type == SILC_SERVER && channel->global_users &&
3214 chl->client->router && !silc_server_channel_has_global(channel))
3215 channel->global_users = FALSE;
3219 /* Update statistics */
3220 if (SILC_IS_LOCAL(client))
3221 server->stat.my_chanclients--;
3222 if (server->server_type == SILC_ROUTER) {
3223 server->stat.cell_chanclients--;
3224 server->stat.chanclients--;
3227 /* If there is not at least one local user on the channel then we don't
3228 need the channel entry anymore, we can remove it safely, unless the
3229 channel is permanent channel */
3230 if (server->server_type == SILC_SERVER &&
3231 !silc_server_channel_has_local(channel)) {
3232 /* Notify about leaving client if this channel has global users. */
3233 if (notify && channel->global_users)
3234 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3235 SILC_NOTIFY_TYPE_SIGNOFF,
3236 signoff_message ? 2 : 1,
3237 clidp->data, clidp->len,
3238 signoff_message, signoff_message ?
3239 strlen(signoff_message) : 0);
3241 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3242 silc_server_channel_delete(server, channel);
3246 /* Send notify to channel about client leaving SILC and channel too */
3248 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3249 SILC_NOTIFY_TYPE_SIGNOFF,
3250 signoff_message ? 2 : 1,
3251 clidp->data, clidp->len,
3252 signoff_message, signoff_message ?
3253 strlen(signoff_message) : 0);
3255 /* Don't create keys if we are shutting down */
3256 if (server->server_shutdown)
3259 /* Re-generate channel key if needed */
3260 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3261 if (!silc_server_create_channel_key(server, channel, 0))
3264 /* Send the channel key to the channel. The key of course is not sent
3265 to the client who was removed from the channel. */
3266 silc_server_send_channel_key(server, client->connection, channel,
3267 server->server_type == SILC_ROUTER ?
3268 FALSE : !server->standalone);
3272 silc_hash_table_list_reset(&htl);
3274 silc_buffer_free(clidp);
3277 /* Removes client from one channel. This is used for example when client
3278 calls LEAVE command to remove itself from the channel. Returns TRUE
3279 if channel still exists and FALSE if the channel is removed when
3280 last client leaves the channel. If `notify' is FALSE notify messages
3283 bool silc_server_remove_from_one_channel(SilcServer server,
3284 SilcSocketConnection sock,
3285 SilcChannelEntry channel,
3286 SilcClientEntry client,
3289 SilcChannelClientEntry chl;
3292 SILC_LOG_DEBUG(("Removing %s from channel %s",
3293 silc_id_render(client->id, SILC_ID_CLIENT),
3294 channel->channel_name));
3296 /* Get the entry to the channel, if this client is not on the channel
3298 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3301 /* Remove channel if this is last client leaving the channel, unless
3302 the channel is permanent. */
3303 if (server->server_type != SILC_SERVER &&
3304 silc_hash_table_count(channel->user_list) < 2) {
3305 silc_server_channel_delete(server, channel);
3309 silc_hash_table_del(client->channels, chl->channel);
3310 silc_hash_table_del(channel->user_list, chl->client);
3311 channel->user_count--;
3313 /* If there is no global users on the channel anymore mark the channel
3314 as local channel. Do not check if the client is local client. */
3315 if (server->server_type == SILC_SERVER && channel->global_users &&
3316 chl->client->router && !silc_server_channel_has_global(channel))
3317 channel->global_users = FALSE;
3321 /* Update statistics */
3322 if (SILC_IS_LOCAL(client))
3323 server->stat.my_chanclients--;
3324 if (server->server_type == SILC_ROUTER) {
3325 server->stat.cell_chanclients--;
3326 server->stat.chanclients--;
3329 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3333 /* If there is not at least one local user on the channel then we don't
3334 need the channel entry anymore, we can remove it safely, unless the
3335 channel is permanent channel */
3336 if (server->server_type == SILC_SERVER &&
3337 !silc_server_channel_has_local(channel)) {
3338 /* Notify about leaving client if this channel has global users. */
3339 if (notify && channel->global_users)
3340 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3341 SILC_NOTIFY_TYPE_LEAVE, 1,
3342 clidp->data, clidp->len);
3344 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3345 silc_server_channel_delete(server, channel);
3346 silc_buffer_free(clidp);
3350 /* Send notify to channel about client leaving the channel */
3352 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3353 SILC_NOTIFY_TYPE_LEAVE, 1,
3354 clidp->data, clidp->len);
3356 silc_buffer_free(clidp);
3360 /* Timeout callback. This is called if connection is idle or for some
3361 other reason is not responding within some period of time. This
3362 disconnects the remote end. */
3364 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3366 SilcServer server = (SilcServer)context;
3367 SilcSocketConnection sock = server->sockets[fd];
3368 SilcProtocolType protocol = 0;
3370 SILC_LOG_DEBUG(("Start"));
3375 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3376 sock->hostname, sock->ip));
3378 /* If we have protocol active we must assure that we call the protocol's
3379 final callback so that all the memory is freed. */
3380 if (sock->protocol) {
3381 protocol = sock->protocol->protocol->type;
3382 silc_protocol_cancel(sock->protocol, server->schedule);
3383 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3384 silc_protocol_execute_final(sock->protocol, server->schedule);
3385 sock->protocol = NULL;
3389 if (sock->user_data)
3390 silc_server_free_sock_user_data(server, sock, NULL);
3392 silc_server_disconnect_remote(server, sock,
3394 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3395 SILC_STATUS_ERR_AUTH_FAILED :
3396 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3397 "Connection timeout");
3400 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3401 function may be used only by router. In real SILC network all channels
3402 are created by routers thus this function is never used by normal
3405 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3406 SilcServerID *router_id,
3412 SilcChannelID *channel_id;
3413 SilcChannelEntry entry;
3417 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3420 cipher = SILC_DEFAULT_CIPHER;
3422 hmac = SILC_DEFAULT_HMAC;
3424 /* Allocate cipher */
3425 if (!silc_cipher_alloc(cipher, &key))
3429 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3430 silc_cipher_free(key);
3434 channel_name = strdup(channel_name);
3436 /* Create the channel ID */
3437 if (!silc_id_create_channel_id(server, router_id, server->rng,
3439 silc_free(channel_name);
3440 silc_cipher_free(key);
3441 silc_hmac_free(newhmac);
3445 /* Create the channel */
3446 entry = silc_idlist_add_channel(server->local_list, channel_name,
3447 SILC_CHANNEL_MODE_NONE, channel_id,
3448 NULL, key, newhmac, 0);
3450 silc_free(channel_name);
3451 silc_cipher_free(key);
3452 silc_hmac_free(newhmac);
3453 silc_free(channel_id);
3457 entry->cipher = strdup(cipher);
3458 entry->hmac_name = strdup(hmac);
3460 /* Now create the actual key material */
3461 if (!silc_server_create_channel_key(server, entry,
3462 silc_cipher_get_key_len(key) / 8)) {
3463 silc_idlist_del_channel(server->local_list, entry);
3467 /* Notify other routers about the new channel. We send the packet
3468 to our primary route. */
3470 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3471 channel_name, entry->id,
3472 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3475 /* Distribute to backup routers */
3476 if (broadcast && server->server_type == SILC_ROUTER) {
3479 SilcUInt32 name_len = strlen(channel_name);
3480 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3481 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3483 packet = silc_channel_payload_encode(channel_name, name_len,
3484 cid, channel_id_len, entry->mode);
3485 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3486 packet->data, packet->len, FALSE, TRUE);
3488 silc_buffer_free(packet);
3491 server->stat.my_channels++;
3492 if (server->server_type == SILC_ROUTER) {
3493 server->stat.channels++;
3494 server->stat.cell_channels++;
3495 entry->users_resolved = TRUE;
3501 /* Same as above but creates the channel with Channel ID `channel_id. */
3504 silc_server_create_new_channel_with_id(SilcServer server,
3508 SilcChannelID *channel_id,
3511 SilcChannelEntry entry;
3515 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3518 cipher = SILC_DEFAULT_CIPHER;
3520 hmac = SILC_DEFAULT_HMAC;
3522 /* Allocate cipher */
3523 if (!silc_cipher_alloc(cipher, &key))
3527 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3528 silc_cipher_free(key);
3532 channel_name = strdup(channel_name);
3534 /* Create the channel */
3535 entry = silc_idlist_add_channel(server->local_list, channel_name,
3536 SILC_CHANNEL_MODE_NONE, channel_id,
3537 NULL, key, newhmac, 0);
3539 silc_cipher_free(key);
3540 silc_hmac_free(newhmac);
3541 silc_free(channel_name);
3545 /* Now create the actual key material */
3546 if (!silc_server_create_channel_key(server, entry,
3547 silc_cipher_get_key_len(key) / 8)) {
3548 silc_idlist_del_channel(server->local_list, entry);
3552 /* Notify other routers about the new channel. We send the packet
3553 to our primary route. */
3555 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3556 channel_name, entry->id,
3557 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3560 /* Distribute to backup routers */
3561 if (broadcast && server->server_type == SILC_ROUTER) {
3564 SilcUInt32 name_len = strlen(channel_name);
3565 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3566 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3568 packet = silc_channel_payload_encode(channel_name, name_len,
3569 cid, channel_id_len, entry->mode);
3570 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3571 packet->data, packet->len, FALSE, TRUE);
3573 silc_buffer_free(packet);
3576 server->stat.my_channels++;
3577 if (server->server_type == SILC_ROUTER) {
3578 server->stat.channels++;
3579 server->stat.cell_channels++;
3580 entry->users_resolved = TRUE;
3586 /* Channel's key re-key timeout callback. */
3588 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3590 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3591 SilcServer server = (SilcServer)rekey->context;
3595 /* Return now if we are shutting down */
3596 if (server->server_shutdown)
3599 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3602 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3605 /* Generates new channel key. This is used to create the initial channel key
3606 but also to re-generate new key for channel. If `key_len' is provided
3607 it is the bytes of the key length. */
3609 bool silc_server_create_channel_key(SilcServer server,
3610 SilcChannelEntry channel,
3614 unsigned char channel_key[32], hash[32];
3617 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3618 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3622 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3624 if (!channel->channel_key)
3625 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3626 channel->channel_key = NULL;
3632 else if (channel->key_len)
3633 len = channel->key_len / 8;
3635 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3637 /* Create channel key */
3638 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3641 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3643 /* Remove old key if exists */
3645 memset(channel->key, 0, channel->key_len / 8);
3646 silc_free(channel->key);
3650 channel->key_len = len * 8;
3651 channel->key = silc_memdup(channel_key, len);
3652 memset(channel_key, 0, sizeof(channel_key));
3654 /* Generate HMAC key from the channel key data and set it */
3656 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3657 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3658 silc_hmac_set_key(channel->hmac, hash,
3659 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3660 memset(hash, 0, sizeof(hash));
3662 if (server->server_type == SILC_ROUTER) {
3663 if (!channel->rekey)
3664 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3665 channel->rekey->context = (void *)server;
3666 channel->rekey->channel = channel;
3667 channel->rekey->key_len = key_len;
3668 if (channel->rekey->task)
3669 silc_schedule_task_del(server->schedule, channel->rekey->task);
3671 channel->rekey->task =
3672 silc_schedule_task_add(server->schedule, 0,
3673 silc_server_channel_key_rekey,
3674 (void *)channel->rekey,
3675 server->config->channel_rekey_secs, 0,
3677 SILC_TASK_PRI_NORMAL);
3683 /* Saves the channel key found in the encoded `key_payload' buffer. This
3684 function is used when we receive Channel Key Payload and also when we're
3685 processing JOIN command reply. Returns entry to the channel. */
3687 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3688 SilcBuffer key_payload,
3689 SilcChannelEntry channel)
3691 SilcChannelKeyPayload payload = NULL;
3692 SilcChannelID *id = NULL;
3693 unsigned char *tmp, hash[32];
3697 /* Decode channel key payload */
3698 payload = silc_channel_key_payload_parse(key_payload->data,
3701 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3706 /* Get the channel entry */
3709 /* Get channel ID */
3710 tmp = silc_channel_key_get_id(payload, &tmp_len);
3711 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3717 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3719 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3721 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3722 silc_id_render(id, SILC_ID_CHANNEL)));
3728 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3730 tmp = silc_channel_key_get_key(payload, &tmp_len);
3736 cipher = silc_channel_key_get_cipher(payload, NULL);
3742 /* Remove old key if exists */
3744 memset(channel->key, 0, channel->key_len / 8);
3745 silc_free(channel->key);
3746 silc_cipher_free(channel->channel_key);
3749 /* Create new cipher */
3750 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3751 channel->channel_key = NULL;
3756 if (channel->cipher)
3757 silc_free(channel->cipher);
3758 channel->cipher = strdup(cipher);
3761 channel->key_len = tmp_len * 8;
3762 channel->key = silc_memdup(tmp, tmp_len);
3763 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3765 /* Generate HMAC key from the channel key data and set it */
3767 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3768 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3769 silc_hmac_set_key(channel->hmac, hash,
3770 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3772 memset(hash, 0, sizeof(hash));
3773 memset(tmp, 0, tmp_len);
3775 if (server->server_type == SILC_ROUTER) {
3776 if (!channel->rekey)
3777 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3778 channel->rekey->context = (void *)server;
3779 channel->rekey->channel = channel;
3780 if (channel->rekey->task)
3781 silc_schedule_task_del(server->schedule, channel->rekey->task);
3783 channel->rekey->task =
3784 silc_schedule_task_add(server->schedule, 0,
3785 silc_server_channel_key_rekey,
3786 (void *)channel->rekey,
3787 server->config->channel_rekey_secs, 0,
3789 SILC_TASK_PRI_NORMAL);
3795 silc_channel_key_payload_free(payload);
3800 /* Heartbeat callback. This function is set as argument for the
3801 silc_socket_set_heartbeat function. The library will call this function
3802 at the set time interval. */
3804 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3807 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3809 SILC_LOG_DEBUG(("Sending heartbeat to %s:%d (%s)", sock->hostname,
3810 sock->port, sock->ip));
3812 /* Send the heartbeat */
3813 silc_server_send_heartbeat(hb->server, sock);
3816 /* Returns assembled of all servers in the given ID list. The packet's
3817 form is dictated by the New ID payload. */
3819 static void silc_server_announce_get_servers(SilcServer server,
3820 SilcServerEntry remote,
3822 SilcBuffer *servers,
3823 unsigned long creation_time)
3825 SilcIDCacheList list;
3826 SilcIDCacheEntry id_cache;
3827 SilcServerEntry entry;
3830 /* Go through all clients in the list */
3831 if (silc_idcache_get_all(id_list->servers, &list)) {
3832 if (silc_idcache_list_first(list, &id_cache)) {
3834 entry = (SilcServerEntry)id_cache->context;
3836 /* Do not announce the one we've sending our announcements and
3837 do not announce ourself. Also check the creation time if it's
3839 if ((entry == remote) || (entry == server->id_entry) ||
3840 (creation_time && entry->data.created < creation_time)) {
3841 if (!silc_idcache_list_next(list, &id_cache))
3846 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3848 *servers = silc_buffer_realloc(*servers,
3850 (*servers)->truelen + idp->len :
3852 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3853 silc_buffer_put(*servers, idp->data, idp->len);
3854 silc_buffer_pull(*servers, idp->len);
3855 silc_buffer_free(idp);
3857 if (!silc_idcache_list_next(list, &id_cache))
3862 silc_idcache_list_free(list);
3867 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3873 p = silc_notify_payload_encode(notify, argc, ap);
3879 /* This function is used by router to announce existing servers to our
3880 primary router when we've connected to it. If `creation_time' is non-zero
3881 then only the servers that has been created after the `creation_time'
3882 will be announced. */
3884 void silc_server_announce_servers(SilcServer server, bool global,
3885 unsigned long creation_time,
3886 SilcSocketConnection remote)
3888 SilcBuffer servers = NULL;
3890 SILC_LOG_DEBUG(("Announcing servers"));
3892 /* Get servers in local list */
3893 silc_server_announce_get_servers(server, remote->user_data,
3894 server->local_list, &servers,
3898 /* Get servers in global list */
3899 silc_server_announce_get_servers(server, remote->user_data,
3900 server->global_list, &servers,
3904 silc_buffer_push(servers, servers->data - servers->head);
3905 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3907 /* Send the packet */
3908 silc_server_packet_send(server, remote,
3909 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3910 servers->data, servers->len, TRUE);
3912 silc_buffer_free(servers);
3916 /* Returns assembled packet of all clients in the given ID list. The
3917 packet's form is dictated by the New ID Payload. */
3919 static void silc_server_announce_get_clients(SilcServer server,
3921 SilcBuffer *clients,
3923 unsigned long creation_time)
3925 SilcIDCacheList list;
3926 SilcIDCacheEntry id_cache;
3927 SilcClientEntry client;
3930 unsigned char mode[4];
3932 /* Go through all clients in the list */
3933 if (silc_idcache_get_all(id_list->clients, &list)) {
3934 if (silc_idcache_list_first(list, &id_cache)) {
3936 client = (SilcClientEntry)id_cache->context;
3938 if (creation_time && client->data.created < creation_time) {
3939 if (!silc_idcache_list_next(list, &id_cache))
3943 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
3944 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
3945 if (!silc_idcache_list_next(list, &id_cache))
3950 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3952 *clients = silc_buffer_realloc(*clients,
3954 (*clients)->truelen + idp->len :
3956 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3957 silc_buffer_put(*clients, idp->data, idp->len);
3958 silc_buffer_pull(*clients, idp->len);
3960 SILC_PUT32_MSB(client->mode, mode);
3962 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3963 2, idp->data, idp->len,
3965 *umodes = silc_buffer_realloc(*umodes,
3967 (*umodes)->truelen + tmp->len :
3969 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3970 silc_buffer_put(*umodes, tmp->data, tmp->len);
3971 silc_buffer_pull(*umodes, tmp->len);
3972 silc_buffer_free(tmp);
3974 silc_buffer_free(idp);
3976 if (!silc_idcache_list_next(list, &id_cache))
3981 silc_idcache_list_free(list);
3985 /* This function is used to announce our existing clients to our router
3986 when we've connected to it. If `creation_time' is non-zero then only
3987 the clients that has been created after the `creation_time' will be
3990 void silc_server_announce_clients(SilcServer server,
3991 unsigned long creation_time,
3992 SilcSocketConnection remote)
3994 SilcBuffer clients = NULL;
3995 SilcBuffer umodes = NULL;
3997 SILC_LOG_DEBUG(("Announcing clients"));
3999 /* Get clients in local list */
4000 silc_server_announce_get_clients(server, server->local_list,
4001 &clients, &umodes, creation_time);
4003 /* As router we announce our global list as well */
4004 if (server->server_type == SILC_ROUTER)
4005 silc_server_announce_get_clients(server, server->global_list,
4006 &clients, &umodes, creation_time);
4009 silc_buffer_push(clients, clients->data - clients->head);
4010 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4012 /* Send the packet */
4013 silc_server_packet_send(server, remote,
4014 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4015 clients->data, clients->len, TRUE);
4017 silc_buffer_free(clients);
4021 silc_buffer_push(umodes, umodes->data - umodes->head);
4022 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4024 /* Send the packet */
4025 silc_server_packet_send(server, remote,
4026 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4027 umodes->data, umodes->len, TRUE);
4029 silc_buffer_free(umodes);
4033 /* Returns channel's topic for announcing it */
4035 void silc_server_announce_get_channel_topic(SilcServer server,
4036 SilcChannelEntry channel,
4041 if (channel->topic) {
4042 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4043 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4044 chidp->data, chidp->len,
4046 strlen(channel->topic));
4047 silc_buffer_free(chidp);
4051 /* Returns assembled packets for channel users of the `channel'. */
4053 void silc_server_announce_get_channel_users(SilcServer server,
4054 SilcChannelEntry channel,
4055 SilcBuffer *channel_modes,
4056 SilcBuffer *channel_users,
4057 SilcBuffer *channel_users_modes)
4059 SilcChannelClientEntry chl;
4060 SilcHashTableList htl;
4061 SilcBuffer chidp, clidp, csidp;
4064 unsigned char mode[4], *fkey = NULL;
4065 SilcUInt32 fkey_len = 0;
4068 SILC_LOG_DEBUG(("Start"));
4070 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4071 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4074 SILC_PUT32_MSB(channel->mode, mode);
4075 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4076 if (channel->founder_key)
4077 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4079 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4080 6, csidp->data, csidp->len,
4083 hmac, hmac ? strlen(hmac) : 0,
4084 channel->passphrase,
4085 channel->passphrase ?
4086 strlen(channel->passphrase) : 0,
4090 silc_buffer_realloc(*channel_modes,
4092 (*channel_modes)->truelen + len : len));
4093 silc_buffer_pull_tail(*channel_modes,
4094 ((*channel_modes)->end -
4095 (*channel_modes)->data));
4096 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4097 silc_buffer_pull(*channel_modes, len);
4098 silc_buffer_free(tmp);
4103 /* Now find all users on the channel */
4104 silc_hash_table_list(channel->user_list, &htl);
4105 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4106 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4109 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4110 clidp->data, clidp->len,
4111 chidp->data, chidp->len);
4114 silc_buffer_realloc(*channel_users,
4116 (*channel_users)->truelen + len : len));
4117 silc_buffer_pull_tail(*channel_users,
4118 ((*channel_users)->end -
4119 (*channel_users)->data));
4121 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4122 silc_buffer_pull(*channel_users, len);
4123 silc_buffer_free(tmp);
4125 /* CUMODE notify for mode change on the channel */
4126 SILC_PUT32_MSB(chl->mode, mode);
4127 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4128 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4129 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4130 4, csidp->data, csidp->len,
4132 clidp->data, clidp->len,
4135 *channel_users_modes =
4136 silc_buffer_realloc(*channel_users_modes,
4137 (*channel_users_modes ?
4138 (*channel_users_modes)->truelen + len : len));
4139 silc_buffer_pull_tail(*channel_users_modes,
4140 ((*channel_users_modes)->end -
4141 (*channel_users_modes)->data));
4143 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4144 silc_buffer_pull(*channel_users_modes, len);
4145 silc_buffer_free(tmp);
4149 silc_buffer_free(clidp);
4151 silc_hash_table_list_reset(&htl);
4152 silc_buffer_free(chidp);
4153 silc_buffer_free(csidp);
4156 /* Returns assembled packets for all channels and users on those channels
4157 from the given ID List. The packets are in the form dictated by the
4158 New Channel and New Channel User payloads. */
4160 void silc_server_announce_get_channels(SilcServer server,
4162 SilcBuffer *channels,
4163 SilcBuffer **channel_modes,
4164 SilcBuffer *channel_users,
4165 SilcBuffer **channel_users_modes,
4166 SilcUInt32 *channel_users_modes_c,
4167 SilcBuffer **channel_topics,
4168 SilcChannelID ***channel_ids,
4169 unsigned long creation_time)
4171 SilcIDCacheList list;
4172 SilcIDCacheEntry id_cache;
4173 SilcChannelEntry channel;
4176 SilcUInt16 name_len;
4178 int i = *channel_users_modes_c;
4181 SILC_LOG_DEBUG(("Start"));
4183 /* Go through all channels in the list */
4184 if (silc_idcache_get_all(id_list->channels, &list)) {
4185 if (silc_idcache_list_first(list, &id_cache)) {
4187 channel = (SilcChannelEntry)id_cache->context;
4189 if (creation_time && channel->created < creation_time)
4194 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4195 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4196 name_len = strlen(channel->channel_name);
4199 len = 4 + name_len + id_len + 4;
4201 silc_buffer_realloc(*channels,
4202 (*channels ? (*channels)->truelen +
4204 silc_buffer_pull_tail(*channels,
4205 ((*channels)->end - (*channels)->data));
4206 silc_buffer_format(*channels,
4207 SILC_STR_UI_SHORT(name_len),
4208 SILC_STR_UI_XNSTRING(channel->channel_name,
4210 SILC_STR_UI_SHORT(id_len),
4211 SILC_STR_UI_XNSTRING(cid, id_len),
4212 SILC_STR_UI_INT(channel->mode),
4214 silc_buffer_pull(*channels, len);
4217 if (creation_time && channel->updated < creation_time)
4223 /* Channel user modes */
4224 *channel_users_modes = silc_realloc(*channel_users_modes,
4225 sizeof(**channel_users_modes) *
4227 (*channel_users_modes)[i] = NULL;
4228 *channel_modes = silc_realloc(*channel_modes,
4229 sizeof(**channel_modes) * (i + 1));
4230 (*channel_modes)[i] = NULL;
4231 *channel_ids = silc_realloc(*channel_ids,
4232 sizeof(**channel_ids) * (i + 1));
4233 (*channel_ids)[i] = NULL;
4234 silc_server_announce_get_channel_users(server, channel,
4235 &(*channel_modes)[i],
4237 &(*channel_users_modes)[i]);
4238 (*channel_ids)[i] = channel->id;
4240 /* Channel's topic */
4241 *channel_topics = silc_realloc(*channel_topics,
4242 sizeof(**channel_topics) * (i + 1));
4243 (*channel_topics)[i] = NULL;
4244 silc_server_announce_get_channel_topic(server, channel,
4245 &(*channel_topics)[i]);
4246 (*channel_users_modes_c)++;
4250 if (!silc_idcache_list_next(list, &id_cache))
4255 silc_idcache_list_free(list);
4259 /* This function is used to announce our existing channels to our router
4260 when we've connected to it. This also announces the users on the
4261 channels to the router. If the `creation_time' is non-zero only the
4262 channels that was created after the `creation_time' are announced.
4263 Note that the channel users are still announced even if the `creation_time'
4266 void silc_server_announce_channels(SilcServer server,
4267 unsigned long creation_time,
4268 SilcSocketConnection remote)
4270 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4271 SilcBuffer *channel_users_modes = NULL;
4272 SilcBuffer *channel_topics = NULL;
4273 SilcUInt32 channel_users_modes_c = 0;
4274 SilcChannelID **channel_ids = NULL;
4276 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4278 /* Get channels and channel users in local list */
4279 silc_server_announce_get_channels(server, server->local_list,
4280 &channels, &channel_modes,
4282 &channel_users_modes,
4283 &channel_users_modes_c,
4285 &channel_ids, creation_time);
4287 /* Get channels and channel users in global list */
4288 if (server->server_type != SILC_SERVER)
4289 silc_server_announce_get_channels(server, server->global_list,
4290 &channels, &channel_modes,
4292 &channel_users_modes,
4293 &channel_users_modes_c,
4295 &channel_ids, creation_time);
4298 silc_buffer_push(channels, channels->data - channels->head);
4299 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4301 /* Send the packet */
4302 silc_server_packet_send(server, remote,
4303 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4304 channels->data, channels->len,
4307 silc_buffer_free(channels);
4310 if (channel_users) {
4311 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4312 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4313 channel_users->len);
4315 /* Send the packet */
4316 silc_server_packet_send(server, remote,
4317 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4318 channel_users->data, channel_users->len,
4321 silc_buffer_free(channel_users);
4324 if (channel_modes) {
4327 for (i = 0; i < channel_users_modes_c; i++) {
4328 if (!channel_modes[i])
4330 silc_buffer_push(channel_modes[i],
4331 channel_modes[i]->data -
4332 channel_modes[i]->head);
4333 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4334 channel_modes[i]->len);
4335 silc_server_packet_send_dest(server, remote,
4336 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4337 channel_ids[i], SILC_ID_CHANNEL,
4338 channel_modes[i]->data,
4339 channel_modes[i]->len,
4341 silc_buffer_free(channel_modes[i]);
4343 silc_free(channel_modes);
4346 if (channel_users_modes) {
4349 for (i = 0; i < channel_users_modes_c; i++) {
4350 if (!channel_users_modes[i])
4352 silc_buffer_push(channel_users_modes[i],
4353 channel_users_modes[i]->data -
4354 channel_users_modes[i]->head);
4355 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4356 channel_users_modes[i]->len);
4357 silc_server_packet_send_dest(server, remote,
4358 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4359 channel_ids[i], SILC_ID_CHANNEL,
4360 channel_users_modes[i]->data,
4361 channel_users_modes[i]->len,
4363 silc_buffer_free(channel_users_modes[i]);
4365 silc_free(channel_users_modes);
4368 if (channel_topics) {
4371 for (i = 0; i < channel_users_modes_c; i++) {
4372 if (!channel_topics[i])
4375 silc_buffer_push(channel_topics[i],
4376 channel_topics[i]->data -
4377 channel_topics[i]->head);
4378 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4379 channel_topics[i]->len);
4380 silc_server_packet_send_dest(server, remote,
4381 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4382 channel_ids[i], SILC_ID_CHANNEL,
4383 channel_topics[i]->data,
4384 channel_topics[i]->len,
4386 silc_buffer_free(channel_topics[i]);
4388 silc_free(channel_topics);
4391 silc_free(channel_ids);
4394 /* Failure timeout callback. If this is called then we will immediately
4395 process the received failure. We always process the failure with timeout
4396 since we do not want to blindly trust to received failure packets.
4397 This won't be called (the timeout is cancelled) if the failure was
4398 bogus (it is bogus if remote does not close the connection after sending
4401 SILC_TASK_CALLBACK(silc_server_failure_callback)
4403 SilcServerFailureContext f = (SilcServerFailureContext)context;
4405 if (f->sock->protocol) {
4406 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4407 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4413 /* Assembles user list and users mode list from the `channel'. */
4415 bool silc_server_get_users_on_channel(SilcServer server,
4416 SilcChannelEntry channel,
4417 SilcBuffer *user_list,
4418 SilcBuffer *mode_list,
4419 SilcUInt32 *user_count)
4421 SilcChannelClientEntry chl;
4422 SilcHashTableList htl;
4423 SilcBuffer client_id_list;
4424 SilcBuffer client_mode_list;
4426 SilcUInt32 list_count = 0, len = 0;
4428 if (!silc_hash_table_count(channel->user_list))
4431 silc_hash_table_list(channel->user_list, &htl);
4432 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4433 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4434 silc_hash_table_list_reset(&htl);
4436 client_id_list = silc_buffer_alloc(len);
4438 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4439 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4440 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4442 silc_hash_table_list(channel->user_list, &htl);
4443 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4445 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4446 silc_buffer_put(client_id_list, idp->data, idp->len);
4447 silc_buffer_pull(client_id_list, idp->len);
4448 silc_buffer_free(idp);
4450 /* Client's mode on channel */
4451 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4452 silc_buffer_pull(client_mode_list, 4);
4456 silc_hash_table_list_reset(&htl);
4457 silc_buffer_push(client_id_list,
4458 client_id_list->data - client_id_list->head);
4459 silc_buffer_push(client_mode_list,
4460 client_mode_list->data - client_mode_list->head);
4462 *user_list = client_id_list;
4463 *mode_list = client_mode_list;
4464 *user_count = list_count;
4468 /* Saves users and their modes to the `channel'. */
4470 void silc_server_save_users_on_channel(SilcServer server,
4471 SilcSocketConnection sock,
4472 SilcChannelEntry channel,
4473 SilcClientID *noadd,
4474 SilcBuffer user_list,
4475 SilcBuffer mode_list,
4476 SilcUInt32 user_count)
4481 SilcClientID *client_id;
4482 SilcClientEntry client;
4483 SilcIDCacheEntry cache;
4484 SilcChannelClientEntry chl;
4486 SILC_LOG_DEBUG(("Start"));
4488 for (i = 0; i < user_count; i++) {
4490 SILC_GET16_MSB(idp_len, user_list->data + 2);
4492 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4493 silc_buffer_pull(user_list, idp_len);
4498 SILC_GET32_MSB(mode, mode_list->data);
4499 silc_buffer_pull(mode_list, 4);
4501 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4502 silc_free(client_id);
4508 /* Check if we have this client cached already. */
4509 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4510 server->server_type, &cache);
4512 client = silc_idlist_find_client_by_id(server->global_list,
4513 client_id, server->server_type,
4516 /* If router did not find such Client ID in its lists then this must
4517 be bogus client or some router in the net is buggy. */
4518 if (server->server_type == SILC_ROUTER) {
4519 silc_free(client_id);
4523 /* We don't have that client anywhere, add it. The client is added
4524 to global list since server didn't have it in the lists so it must be
4526 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4527 silc_id_dup(client_id, SILC_ID_CLIENT),
4528 sock->user_data, NULL, 0);
4530 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4531 silc_free(client_id);
4535 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4540 silc_free(client_id);
4542 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4543 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4544 "%s", channel->channel_name));
4548 if (!silc_server_client_on_channel(client, channel, &chl)) {
4549 /* Client was not on the channel, add it. */
4550 chl = silc_calloc(1, sizeof(*chl));
4551 chl->client = client;
4553 chl->channel = channel;
4554 silc_hash_table_add(channel->user_list, chl->client, chl);
4555 silc_hash_table_add(client->channels, chl->channel, chl);
4556 channel->user_count++;
4564 /* Saves channels and channels user modes to the `client'. Removes
4565 the client from those channels that are not sent in the list but
4568 void silc_server_save_user_channels(SilcServer server,
4569 SilcSocketConnection sock,
4570 SilcClientEntry client,
4571 SilcBuffer channels,
4572 SilcBuffer channels_user_modes)
4575 SilcUInt32 *chumodes;
4576 SilcChannelPayload entry;
4577 SilcChannelEntry channel;
4578 SilcChannelID *channel_id;
4579 SilcChannelClientEntry chl;
4580 SilcHashTable ht = NULL;
4581 SilcHashTableList htl;
4585 if (!channels || !channels_user_modes ||
4586 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4589 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4590 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4592 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4593 NULL, NULL, NULL, TRUE);
4594 silc_dlist_start(ch);
4595 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4596 /* Check if we have this channel, and add it if we don't have it.
4597 Also add the client on the channel unless it is there already. */
4598 channel_id = silc_channel_get_id_parse(entry);
4599 channel = silc_idlist_find_channel_by_id(server->local_list,
4602 channel = silc_idlist_find_channel_by_id(server->global_list,
4605 if (server->server_type != SILC_SERVER) {
4606 silc_free(channel_id);
4611 /* We don't have that channel anywhere, add it. */
4612 name = silc_channel_get_name(entry, NULL);
4613 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4614 channel_id, server->router,
4617 silc_free(channel_id);
4624 channel->mode = silc_channel_get_mode(entry);
4626 /* Add the client on the channel */
4627 if (!silc_server_client_on_channel(client, channel, &chl)) {
4628 chl = silc_calloc(1, sizeof(*chl));
4629 chl->client = client;
4630 chl->mode = chumodes[i++];
4631 chl->channel = channel;
4632 silc_hash_table_add(channel->user_list, chl->client, chl);
4633 silc_hash_table_add(client->channels, chl->channel, chl);
4634 channel->user_count++;
4637 chl->mode = chumodes[i++];
4640 silc_hash_table_add(ht, channel, channel);
4641 silc_free(channel_id);
4643 silc_channel_payload_list_free(ch);
4644 silc_free(chumodes);
4648 /* Go through the list again and remove client from channels that
4649 are no part of the list. */
4651 silc_hash_table_list(client->channels, &htl);
4652 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4653 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4654 silc_hash_table_del(chl->channel->user_list, chl->client);
4655 silc_hash_table_del(chl->client->channels, chl->channel);
4659 silc_hash_table_list_reset(&htl);
4660 silc_hash_table_free(ht);
4662 silc_hash_table_list(client->channels, &htl);
4663 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4664 silc_hash_table_del(chl->channel->user_list, chl->client);
4665 silc_hash_table_del(chl->client->channels, chl->channel);
4668 silc_hash_table_list_reset(&htl);
4672 /* Lookups route to the client indicated by the `id_data'. The connection
4673 object and internal data object is returned. Returns NULL if route
4674 could not be found to the client. If the `client_id' is specified then
4675 it is used and the `id_data' is ignored. */
4677 SilcSocketConnection
4678 silc_server_get_client_route(SilcServer server,
4679 unsigned char *id_data,
4681 SilcClientID *client_id,
4682 SilcIDListData *idata,
4683 SilcClientEntry *client_entry)
4686 SilcClientEntry client;
4688 SILC_LOG_DEBUG(("Start"));
4691 *client_entry = NULL;
4693 /* Decode destination Client ID */
4695 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4697 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4701 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4704 /* If the destination belongs to our server we don't have to route
4705 the packet anywhere but to send it to the local destination. */
4706 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4710 /* If we are router and the client has router then the client is in
4711 our cell but not directly connected to us. */
4712 if (server->server_type == SILC_ROUTER && client->router) {
4713 /* We are of course in this case the client's router thus the route
4714 to the client is the server who owns the client. So, we will send
4715 the packet to that server. */
4717 *idata = (SilcIDListData)client->router;
4718 return client->router->connection;
4721 /* Seems that client really is directly connected to us */
4723 *idata = (SilcIDListData)client;
4725 *client_entry = client;
4726 return client->connection;
4729 /* Destination belongs to someone not in this server. If we are normal
4730 server our action is to send the packet to our router. */
4731 if (server->server_type != SILC_ROUTER && !server->standalone) {
4734 *idata = (SilcIDListData)server->router;
4735 return SILC_PRIMARY_ROUTE(server);
4738 /* We are router and we will perform route lookup for the destination
4739 and send the packet to fastest route. */
4740 if (server->server_type == SILC_ROUTER && !server->standalone) {
4741 /* Check first that the ID is valid */
4742 client = silc_idlist_find_client_by_id(server->global_list, id,
4745 SilcSocketConnection dst_sock;
4747 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4751 *idata = (SilcIDListData)dst_sock->user_data;
4760 /* Encodes and returns channel list of channels the `client' has joined.
4761 Secret channels are not put to the list. */
4763 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4764 SilcClientEntry client,
4767 SilcBuffer *user_mode_list)
4769 SilcBuffer buffer = NULL;
4770 SilcChannelEntry channel;
4771 SilcChannelClientEntry chl;
4772 SilcHashTableList htl;
4775 SilcUInt16 name_len;
4779 *user_mode_list = NULL;
4781 silc_hash_table_list(client->channels, &htl);
4782 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4783 channel = chl->channel;
4785 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4787 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4790 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4791 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4792 name_len = strlen(channel->channel_name);
4794 len = 4 + name_len + id_len + 4;
4795 buffer = silc_buffer_realloc(buffer,
4796 (buffer ? buffer->truelen + len : len));
4797 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4798 silc_buffer_format(buffer,
4799 SILC_STR_UI_SHORT(name_len),
4800 SILC_STR_UI_XNSTRING(channel->channel_name,
4802 SILC_STR_UI_SHORT(id_len),
4803 SILC_STR_UI_XNSTRING(cid, id_len),
4804 SILC_STR_UI_INT(chl->channel->mode),
4806 silc_buffer_pull(buffer, len);
4809 if (user_mode_list) {
4810 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4812 (*user_mode_list)->truelen + 4 :
4814 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4815 (*user_mode_list)->data));
4816 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4817 silc_buffer_pull(*user_mode_list, 4);
4820 silc_hash_table_list_reset(&htl);
4823 silc_buffer_push(buffer, buffer->data - buffer->head);
4824 if (user_mode_list && *user_mode_list)
4825 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4826 (*user_mode_list)->head));
4831 /* Finds client entry by Client ID and if it is not found then resolves
4832 it using WHOIS command. */
4834 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4835 SilcClientID *client_id,
4836 bool always_resolve,
4839 SilcClientEntry client;
4844 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4847 client = silc_idlist_find_client_by_id(server->global_list,
4848 client_id, TRUE, NULL);
4849 if (!client && server->server_type == SILC_ROUTER)
4853 if (!client && server->standalone)
4856 if (!client || !client->nickname || !client->username ||
4858 SilcBuffer buffer, idp;
4861 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4862 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4863 client->resolve_cmd_ident = ++server->cmd_ident;
4866 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4867 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4868 server->cmd_ident, 1,
4869 4, idp->data, idp->len);
4870 silc_server_packet_send(server, client ? client->router->connection :
4871 SILC_PRIMARY_ROUTE(server),
4872 SILC_PACKET_COMMAND, 0,
4873 buffer->data, buffer->len, FALSE);
4874 silc_buffer_free(idp);
4875 silc_buffer_free(buffer);
4886 /* A timeout callback for the re-key. We will be the initiator of the
4889 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4891 SilcSocketConnection sock = (SilcSocketConnection)context;
4892 SilcIDListData idata = (SilcIDListData)sock->user_data;
4893 SilcServer server = (SilcServer)idata->rekey->context;
4894 SilcProtocol protocol;
4895 SilcServerRekeyInternalContext *proto_ctx;
4897 /* Allocate internal protocol context. This is sent as context
4899 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4900 proto_ctx->server = (void *)server;
4901 proto_ctx->sock = sock;
4902 proto_ctx->responder = FALSE;
4903 proto_ctx->pfs = idata->rekey->pfs;
4905 /* Perform rekey protocol. Will call the final callback after the
4906 protocol is over. */
4907 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4908 &protocol, proto_ctx, silc_server_rekey_final);
4909 sock->protocol = protocol;
4911 /* Run the protocol */
4912 silc_protocol_execute(protocol, server->schedule, 0, 0);
4914 SILC_LOG_DEBUG(("Rekey protocol completed"));
4916 /* Re-register re-key timeout */
4917 silc_schedule_task_add(server->schedule, sock->sock,
4918 silc_server_rekey_callback,
4919 context, idata->rekey->timeout, 0,
4920 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4923 /* The final callback for the REKEY protocol. This will actually take the
4924 new key material into use. */
4926 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4928 SilcProtocol protocol = (SilcProtocol)context;
4929 SilcServerRekeyInternalContext *ctx =
4930 (SilcServerRekeyInternalContext *)protocol->context;
4931 SilcServer server = (SilcServer)ctx->server;
4932 SilcSocketConnection sock = ctx->sock;
4934 SILC_LOG_DEBUG(("Start"));
4936 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4937 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4938 /* Error occured during protocol */
4939 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4940 silc_protocol_cancel(protocol, server->schedule);
4941 silc_protocol_free(protocol);
4942 sock->protocol = NULL;
4944 silc_packet_context_free(ctx->packet);
4946 silc_ske_free(ctx->ske);
4951 /* Purge the outgoing data queue to assure that all rekey packets really
4952 go to the network before we quit the protocol. */
4953 silc_server_packet_queue_purge(server, sock);
4956 silc_protocol_free(protocol);
4957 sock->protocol = NULL;
4959 silc_packet_context_free(ctx->packet);
4961 silc_ske_free(ctx->ske);
4965 /* Task callback used to retrieve network statistical information from
4966 router server once in a while. */
4968 SILC_TASK_CALLBACK(silc_server_get_stats)
4970 SilcServer server = (SilcServer)context;
4971 SilcBuffer idp, packet;
4973 SILC_LOG_DEBUG(("Retrieving stats from router"));
4975 if (!server->standalone) {
4976 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4977 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4978 ++server->cmd_ident, 1,
4979 1, idp->data, idp->len);
4980 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4981 SILC_PACKET_COMMAND, 0, packet->data,
4982 packet->len, FALSE);
4983 silc_buffer_free(packet);
4984 silc_buffer_free(idp);
4987 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4988 server, 120, 0, SILC_TASK_TIMEOUT,