5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2008 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; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 #include "serverincludes.h"
21 #include "server_internal.h"
24 /************************* Types and definitions ****************************/
26 SILC_TASK_CALLBACK(silc_server_get_stats);
27 SILC_TASK_CALLBACK(silc_server_connect_router);
28 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
29 SILC_TASK_CALLBACK(silc_server_do_rekey);
30 SILC_TASK_CALLBACK(silc_server_purge_expired_clients);
31 static void silc_server_accept_new_connection(SilcNetStatus status,
34 static void silc_server_packet_parse_type(SilcServer server,
35 SilcPacketStream sock,
37 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
41 /************************ Static utility functions **************************/
43 /* SKE public key verification callback */
46 silc_server_verify_key(SilcSKE ske,
47 SilcPublicKey public_key,
49 SilcSKEVerifyCbCompletion completion,
50 void *completion_context)
52 SilcPacketStream sock = context;
53 SilcUnknownEntry entry = silc_packet_get_context(sock);
55 SILC_LOG_DEBUG(("Verifying public key"));
57 if (silc_pkcs_get_type(public_key) != SILC_SKE_PK_TYPE_SILC) {
58 SILC_LOG_WARNING(("We don't support %s (%s) port %d public key type %d",
59 entry->hostname, entry->ip, entry->port,
60 silc_pkcs_get_type(public_key)));
61 completion(ske, SILC_SKE_STATUS_UNSUPPORTED_PUBLIC_KEY,
66 /* We accept all keys without explicit verification */
67 completion(ske, SILC_SKE_STATUS_OK, completion_context);
71 /************************ Packet engine callbacks ***************************/
73 /* Packet engine callback to receive a packet */
75 static SilcBool silc_server_packet_receive(SilcPacketEngine engine,
76 SilcPacketStream stream,
78 void *callback_context,
81 SilcServer server = callback_context;
82 SilcIDListData idata = stream_context;
87 /* Packets we do not handle */
88 switch (packet->type) {
89 case SILC_PACKET_HEARTBEAT:
90 case SILC_PACKET_SUCCESS:
91 case SILC_PACKET_FAILURE:
92 case SILC_PACKET_REJECT:
93 case SILC_PACKET_KEY_EXCHANGE:
94 case SILC_PACKET_KEY_EXCHANGE_1:
95 case SILC_PACKET_KEY_EXCHANGE_2:
96 case SILC_PACKET_REKEY_DONE:
97 case SILC_PACKET_CONNECTION_AUTH:
102 /* Only specific packets can come without source ID present. */
103 if ((!packet->src_id ||
104 !(idata->status & SILC_IDLIST_STATUS_REGISTERED)) &&
105 packet->type != SILC_PACKET_NEW_CLIENT &&
106 packet->type != SILC_PACKET_NEW_SERVER &&
107 packet->type != SILC_PACKET_RESUME_CLIENT &&
108 packet->type != SILC_PACKET_CONNECTION_AUTH_REQUEST &&
109 packet->type != SILC_PACKET_DISCONNECT)
112 /* NEW_CLIENT and NEW_SERVER are accepted only without source ID and
113 for unregistered connection. */
114 if (packet->src_id && (packet->type == SILC_PACKET_NEW_CLIENT ||
115 packet->type == SILC_PACKET_NEW_SERVER) &&
116 (idata->status & SILC_IDLIST_STATUS_REGISTERED))
119 /* Ignore packets from disabled connection */
120 if (idata->status & SILC_IDLIST_STATUS_DISABLED &&
121 packet->type != SILC_PACKET_HEARTBEAT &&
122 packet->type != SILC_PACKET_RESUME_ROUTER &&
123 packet->type != SILC_PACKET_REKEY)
126 /* Check that the the current client ID is same as in the client's packet. */
127 if (idata->conn_type == SILC_CONN_CLIENT) {
128 SilcClientEntry client = (SilcClientEntry)silc_packet_get_context(stream);
129 SilcClientID client_id;
131 if (client->id && packet->src_id &&
132 silc_id_str2id(packet->src_id, packet->src_id_len,
133 packet->src_id_type, &client_id, sizeof(client_id))) {
134 if (!SILC_ID_CLIENT_COMPARE(client->id, &client_id)) {
135 SILC_LOG_DEBUG(("Packet source is not same as sender, packet %s",
136 silc_get_packet_name(packet->type)));
142 if (server->server_type == SILC_ROUTER) {
143 /* Route the packet if it is not destined to us. Other ID types but
144 server are handled separately after processing them. */
145 if (packet->dst_id &&
146 !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
147 packet->dst_id_type == SILC_ID_SERVER &&
148 idata->conn_type != SILC_CONN_CLIENT &&
149 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
150 SilcPacketStream conn;
151 SilcServerID server_id;
153 silc_id_str2id(packet->dst_id, packet->dst_id_len, packet->dst_id_type,
154 &server_id, sizeof(server_id));
156 conn = silc_server_route_get(server, &server_id, SILC_ID_SERVER);
158 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
159 silc_id_render(&server_id, SILC_ID_SERVER)));
163 silc_server_packet_route(server, conn, packet);
164 silc_packet_free(packet);
169 /* Broadcast packet if it is marked as broadcast packet and it is
170 originated from router and we are router. */
171 if (server->server_type == SILC_ROUTER &&
172 idata->conn_type == SILC_CONN_ROUTER &&
173 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
174 /* Broadcast to our primary route */
175 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
177 /* If we have backup routers then we need to feed all broadcast
178 data to those servers. */
179 silc_server_backup_broadcast(server, stream, packet);
183 silc_server_packet_parse_type(server, stream, packet);
188 /* Packet engine callback to indicate end of stream */
190 static void silc_server_packet_eos(SilcPacketEngine engine,
191 SilcPacketStream stream,
192 void *callback_context,
193 void *stream_context)
195 SilcServer server = callback_context;
196 SilcIDListData idata = silc_packet_get_context(stream);
198 SILC_LOG_DEBUG(("End of stream received, sock %p", stream));
203 if (server->router_conn && server->router_conn->sock == stream &&
204 !server->router && server->standalone) {
205 if (idata->sconn && idata->sconn->callback)
206 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
207 silc_server_create_connections(server);
208 silc_server_free_sock_user_data(server, stream, NULL);
210 /* If backup disconnected then mark that resuming will not be allowed */
211 if (server->server_type == SILC_ROUTER && !server->backup_router &&
212 idata->conn_type == SILC_CONN_SERVER) {
213 SilcServerEntry server_entry = (SilcServerEntry)idata;
214 if (server_entry->server_type == SILC_BACKUP_ROUTER)
215 server->backup_closed = TRUE;
218 if (idata->sconn && idata->sconn->callback)
219 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
220 silc_server_free_sock_user_data(server, stream, NULL);
223 silc_server_close_connection(server, stream);
226 SILC_TASK_CALLBACK(silc_server_packet_error_timeout)
228 SilcServer server = app_context;
229 SilcPacketStream stream = context;
230 SilcIDListData idata = silc_packet_get_context(stream);
235 if (server->router_conn && server->router_conn->sock == stream &&
236 !server->router && server->standalone) {
237 silc_server_create_connections(server);
239 /* If backup disconnected then mark that resuming will not be allowed */
240 if (server->server_type == SILC_ROUTER && !server->backup_router &&
241 idata->conn_type == SILC_CONN_SERVER) {
242 SilcServerEntry server_entry = (SilcServerEntry)idata;
243 if (server_entry->server_type == SILC_BACKUP_ROUTER)
244 server->backup_closed = TRUE;
247 if (idata->sconn && idata->sconn->callback)
248 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
249 silc_server_free_sock_user_data(server, stream, NULL);
252 silc_server_close_connection(server, stream);
255 /* Packet engine callback to indicate error */
257 static void silc_server_packet_error(SilcPacketEngine engine,
258 SilcPacketStream stream,
259 SilcPacketError error,
260 void *callback_context,
261 void *stream_context)
263 SilcServer server = callback_context;
264 SilcIDListData idata = silc_packet_get_context(stream);
265 SilcStream sock = silc_packet_stream_get_stream(stream);
269 SILC_LOG_DEBUG(("Packet error, sock %p", stream));
274 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
277 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
278 SILC_CONNTYPE_STRING(idata->conn_type),
279 silc_packet_error_string(error)));
281 if (!silc_packet_stream_is_valid(stream))
284 silc_schedule_task_add_timeout(server->schedule,
285 silc_server_packet_error_timeout,
289 /* Packet stream callbacks */
290 static SilcPacketCallbacks silc_server_stream_cbs =
292 silc_server_packet_receive,
293 silc_server_packet_eos,
294 silc_server_packet_error
297 /* Parses the packet type and calls what ever routines the packet type
298 requires. This is done for all incoming packets. */
300 static void silc_server_packet_parse_type(SilcServer server,
301 SilcPacketStream sock,
304 SilcPacketType type = packet->type;
305 SilcIDListData idata = silc_packet_get_context(sock);
307 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
308 silc_get_packet_name(type), packet->flags));
310 /* Parse the packet type */
312 case SILC_PACKET_NOTIFY:
314 * Received notify packet. Server can receive notify packets from
315 * router. Server then relays the notify messages to clients if needed.
317 if (packet->flags & SILC_PACKET_FLAG_LIST)
318 silc_server_notify_list(server, sock, packet);
320 silc_server_notify(server, sock, packet);
324 * Private Message packets
326 case SILC_PACKET_PRIVATE_MESSAGE:
328 * Received private message packet. The packet is coming from either
331 if (packet->flags & SILC_PACKET_FLAG_LIST)
333 idata->last_receive = time(NULL);
334 silc_server_private_message(server, sock, packet);
340 case SILC_PACKET_CHANNEL_MESSAGE:
342 * Received channel message. Channel messages are special packets
343 * (although probably most common ones) thus they are handled
346 if (packet->flags & SILC_PACKET_FLAG_LIST)
348 idata->last_receive = time(NULL);
349 silc_server_channel_message(server, sock, packet);
355 case SILC_PACKET_COMMAND:
357 * Recived command. Processes the command request and allocates the
358 * command context and calls the command.
360 if (packet->flags & SILC_PACKET_FLAG_LIST)
362 server->stat.commands_received++;
363 silc_server_command_process(server, sock, packet);
366 case SILC_PACKET_COMMAND_REPLY:
368 * Received command reply packet. Received command reply to command. It
369 * may be reply to command sent by us or reply to command sent by client
370 * that we've routed further.
372 if (packet->flags & SILC_PACKET_FLAG_LIST)
374 server->stat.commands_received++;
375 silc_server_command_reply(server, sock, packet);
378 case SILC_PACKET_DISCONNECT:
381 char *message = NULL;
382 const char *hostname, *ip;
384 if (packet->flags & SILC_PACKET_FLAG_LIST)
386 if (silc_buffer_len(&packet->buffer) < 1)
389 status = (SilcStatus)packet->buffer.data[0];
390 if (silc_buffer_len(&packet->buffer) > 1 &&
391 silc_utf8_valid(packet->buffer.data + 1,
392 silc_buffer_len(&packet->buffer) - 1))
393 message = silc_memdup(packet->buffer.data + 1,
394 silc_buffer_len(&packet->buffer) - 1);
396 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
397 NULL, &hostname, &ip, NULL))
400 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
401 silc_get_status_message(status), status,
402 message ? message : ""));
406 /* Do not switch to backup in case of error */
407 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
409 /* If backup disconnected then mark that resuming will not be allowed */
410 if (server->server_type == SILC_ROUTER && !server->backup_router &&
411 idata->conn_type == SILC_CONN_SERVER) {
412 SilcServerEntry server_entry = (SilcServerEntry)idata;
413 if (server_entry->server_type == SILC_BACKUP_ROUTER)
414 server->backup_closed = TRUE;
417 /* Handle the disconnection from our end too */
418 if (SILC_IS_LOCAL(idata))
419 silc_server_free_sock_user_data(server, sock, NULL);
420 silc_server_close_connection(server, sock);
421 server->backup_noswitch = FALSE;
425 case SILC_PACKET_CHANNEL_KEY:
427 * Received key for channel. As channels are created by the router
428 * the keys are as well. We will distribute the key to all of our
429 * locally connected clients on the particular channel. Router
430 * never receives this channel and thus is ignored.
432 if (packet->flags & SILC_PACKET_FLAG_LIST)
434 silc_server_channel_key(server, sock, packet);
437 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
439 * Private message key packet.
441 if (packet->flags & SILC_PACKET_FLAG_LIST)
443 silc_server_private_message_key(server, sock, packet);
446 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
448 * Connection authentication request packet. When we receive this packet
449 * we will send to the other end information about our mandatory
450 * authentication method for the connection. This packet maybe received
453 if (packet->flags & SILC_PACKET_FLAG_LIST)
455 silc_server_connection_auth_request(server, sock, packet);
458 case SILC_PACKET_NEW_ID:
460 * Received New ID packet. This includes some new ID that has been
461 * created. It may be for client, server or channel. This is the way
462 * to distribute information about new registered entities in the
465 if (packet->flags & SILC_PACKET_FLAG_LIST)
466 silc_server_new_id_list(server, sock, packet);
468 silc_server_new_id(server, sock, packet);
471 case SILC_PACKET_NEW_CLIENT:
473 * Received new client packet. This includes client information that
474 * we will use to create initial client ID. After creating new
475 * ID we will send it to the client.
477 if (packet->flags & SILC_PACKET_FLAG_LIST)
479 silc_server_new_client(server, sock, packet);
482 case SILC_PACKET_NEW_SERVER:
484 * Received new server packet. This includes Server ID and some other
485 * information that we may save. This is received after server has
488 if (packet->flags & SILC_PACKET_FLAG_LIST)
490 silc_server_new_server(server, sock, packet);
493 case SILC_PACKET_NEW_CHANNEL:
495 * Received new channel packet. Information about new channel in the
496 * network are distributed using this packet.
498 if (packet->flags & SILC_PACKET_FLAG_LIST)
499 silc_server_new_channel_list(server, sock, packet);
501 silc_server_new_channel(server, sock, packet);
504 case SILC_PACKET_HEARTBEAT:
506 * Received heartbeat.
508 if (packet->flags & SILC_PACKET_FLAG_LIST)
512 case SILC_PACKET_KEY_AGREEMENT:
514 * Received heartbeat.
516 if (packet->flags & SILC_PACKET_FLAG_LIST)
518 silc_server_key_agreement(server, sock, packet);
521 case SILC_PACKET_REKEY:
523 * Received re-key packet. The sender wants to regenerate the session
526 if (packet->flags & SILC_PACKET_FLAG_LIST)
528 silc_server_rekey(server, sock, packet);
531 case SILC_PACKET_FTP:
533 if (packet->flags & SILC_PACKET_FLAG_LIST)
535 silc_server_ftp(server, sock, packet);
538 case SILC_PACKET_RESUME_CLIENT:
540 if (packet->flags & SILC_PACKET_FLAG_LIST)
542 silc_server_resume_client(server, sock, packet);
545 case SILC_PACKET_RESUME_ROUTER:
546 /* Resume router packet received. This packet is received for backup
547 router resuming protocol. */
548 if (packet->flags & SILC_PACKET_FLAG_LIST)
550 silc_server_backup_resume_router(server, sock, packet);
554 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
559 /****************************** Server API **********************************/
561 /* Allocates a new SILC server object. This has to be done before the server
562 can be used. After allocation one must call silc_server_init to initialize
563 the server. The new allocated server object is returned to the new_server
566 SilcBool silc_server_alloc(SilcServer *new_server)
570 SILC_LOG_DEBUG(("Allocating new server object"));
572 server = silc_calloc(1, sizeof(*server));
575 server->server_type = SILC_SERVER;
576 server->standalone = TRUE;
577 server->local_list = silc_calloc(1, sizeof(*server->local_list));
578 if (!server->local_list)
580 server->global_list = silc_calloc(1, sizeof(*server->global_list));
581 if (!server->global_list)
583 server->pending_commands = silc_dlist_init();
584 if (!server->pending_commands)
586 server->listeners = silc_dlist_init();
587 if (!server->listeners)
589 server->repository = silc_skr_alloc();
590 if (!server->repository)
592 server->conns = silc_dlist_init();
595 server->expired_clients = silc_dlist_init();
596 if (!server->expired_clients)
599 *new_server = server;
604 /* Free's the SILC server object. This is called at the very end before
607 void silc_server_free(SilcServer server)
610 SilcIDCacheEntry cache;
611 SilcIDListData idata;
613 SILC_LOG_DEBUG(("Free server %p", server));
618 silc_server_backup_free(server);
619 silc_server_config_unref(&server->config_ref);
621 silc_rng_free(server->rng);
622 if (server->public_key)
623 silc_pkcs_public_key_free(server->public_key);
624 if (server->private_key)
625 silc_pkcs_private_key_free(server->private_key);
626 if (server->pending_commands)
627 silc_dlist_uninit(server->pending_commands);
628 if (server->id_entry) {
629 if (server->id_entry->data.sconn)
630 silc_schedule_task_del_by_context(server->schedule,
631 server->id_entry->data.sconn->sock);
632 silc_idlist_del_server(server->local_list, server->id_entry);
635 /* Delete all channels */
636 if (silc_idcache_get_all(server->local_list->channels, &list)) {
637 silc_list_start(list);
638 while ((cache = silc_list_get(list)))
639 silc_idlist_del_channel(server->local_list, cache->context);
641 if (silc_idcache_get_all(server->global_list->channels, &list)) {
642 silc_list_start(list);
643 while ((cache = silc_list_get(list)))
644 silc_idlist_del_channel(server->global_list, cache->context);
647 /* Delete all clients */
648 if (silc_idcache_get_all(server->local_list->clients, &list)) {
649 silc_list_start(list);
650 while ((cache = silc_list_get(list))) {
651 silc_schedule_task_del_by_context(server->schedule, cache->context);
652 silc_idlist_del_client(server->local_list, cache->context);
655 if (silc_idcache_get_all(server->global_list->clients, &list)) {
656 silc_list_start(list);
657 while ((cache = silc_list_get(list))) {
658 silc_schedule_task_del_by_context(server->schedule, cache->context);
659 silc_idlist_del_client(server->global_list, cache->context);
663 /* Delete all servers */
664 if (silc_idcache_get_all(server->local_list->servers, &list)) {
665 silc_list_start(list);
666 while ((cache = silc_list_get(list))) {
667 idata = (SilcIDListData)cache->context;
669 silc_schedule_task_del_by_context(server->schedule,
671 silc_idlist_del_server(server->local_list, cache->context);
674 if (silc_idcache_get_all(server->global_list->servers, &list)) {
675 while ((cache = silc_list_get(list))) {
676 idata = (SilcIDListData)cache->context;
678 silc_schedule_task_del_by_context(server->schedule,
680 silc_idlist_del_server(server->global_list, cache->context);
684 silc_schedule_task_del_by_context(server->schedule, server);
685 silc_schedule_uninit(server->schedule);
686 server->schedule = NULL;
688 silc_idcache_free(server->local_list->clients);
689 silc_idcache_free(server->local_list->servers);
690 silc_idcache_free(server->local_list->channels);
691 silc_idcache_free(server->global_list->clients);
692 silc_idcache_free(server->global_list->servers);
693 silc_idcache_free(server->global_list->channels);
694 silc_hash_table_free(server->watcher_list);
695 silc_hash_table_free(server->watcher_list_pk);
696 silc_hash_free(server->md5hash);
697 silc_hash_free(server->sha1hash);
699 silc_dlist_uninit(server->listeners);
700 silc_dlist_uninit(server->conns);
701 silc_dlist_uninit(server->expired_clients);
702 silc_skr_free(server->repository);
703 silc_packet_engine_stop(server->packet_engine);
705 silc_free(server->local_list);
706 silc_free(server->global_list);
707 silc_free(server->server_name);
708 silc_free(server->id);
711 silc_hmac_unregister_all();
712 silc_hash_unregister_all();
713 silc_cipher_unregister_all();
714 silc_pkcs_unregister_all();
717 /* Creates a new server listener. */
719 static SilcNetListener
720 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
722 SilcNetListener listener;
725 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
726 server->config->require_reverse_lookup,
728 silc_server_accept_new_connection, server);
730 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
738 /* Adds a secondary listener. */
740 SilcBool silc_server_init_secondary(SilcServer server)
742 SilcServerConfigServerInfoInterface *interface;
743 SilcNetListener listener;
745 for (interface = server->config->server_info->secondary; interface;
746 interface = interface->next) {
747 listener = silc_server_listen(server, interface->server_ip,
751 silc_dlist_add(server->listeners, listener);
757 /* Initializes the entire SILC server. This is called always before running
758 the server. This is called only once at the initialization of the program.
759 This binds the server to its listenning port. After this function returns
760 one should call silc_server_run to start the server. This returns TRUE
761 when everything is ok to run the server. Configuration file must be
762 read and parsed before calling this. */
764 SilcBool silc_server_init(SilcServer server)
767 SilcServerEntry id_entry;
768 SilcNetListener listener;
773 SILC_LOG_DEBUG(("Initializing server"));
775 server->starttime = time(NULL);
777 /* Take config object for us */
778 silc_server_config_ref(&server->config_ref, server->config,
782 /* Set debugging on if configured */
783 if (server->config->debug_string) {
784 silc_log_debug(TRUE);
785 silc_log_set_debug_string(server->config->debug_string);
787 #endif /* SILC_DEBUG */
789 /* Steal public and private key from the config object */
790 server->public_key = server->config->server_info->public_key;
791 server->private_key = server->config->server_info->private_key;
792 server->config->server_info->public_key = NULL;
793 server->config->server_info->private_key = NULL;
795 /* Register all configured ciphers, PKCS and hash functions. */
796 if (!silc_server_config_register_ciphers(server))
797 silc_cipher_register_default();
798 if (!silc_server_config_register_pkcs(server))
799 silc_pkcs_register_default();
800 if (!silc_server_config_register_hashfuncs(server))
801 silc_hash_register_default();
802 if (!silc_server_config_register_hmacs(server))
803 silc_hmac_register_default();
805 /* Initialize random number generator for the server. */
806 server->rng = silc_rng_alloc();
807 silc_rng_init(server->rng);
808 silc_rng_global_init(server->rng);
810 /* Initialize hash functions for server to use */
811 silc_hash_alloc("md5", &server->md5hash);
812 silc_hash_alloc("sha1", &server->sha1hash);
814 /* Initialize the scheduler */
815 server->schedule = silc_schedule_init(server->config->param.connections_max,
817 if (!server->schedule)
820 /* First, register log files configuration for error output */
821 silc_server_config_setlogfiles(server);
823 /* Initialize ID caches */
824 server->local_list->clients =
825 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
827 server->local_list->servers =
828 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
830 server->local_list->channels =
831 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
834 /* These are allocated for normal server as well as these hold some
835 global information that the server has fetched from its router. For
836 router these are used as they are supposed to be used on router. */
837 server->global_list->clients =
838 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
840 server->global_list->servers =
841 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
843 server->global_list->channels =
844 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
847 /* Init watcher lists */
848 server->watcher_list =
849 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
850 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
852 if (!server->watcher_list)
854 server->watcher_list_pk =
855 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
856 silc_hash_public_key_compare, NULL,
858 if (!server->watcher_list_pk)
861 /* Create TCP listener */
862 listener = silc_server_listen(
864 server->config->server_info->primary == NULL ? NULL :
865 server->config->server_info->primary->server_ip,
866 server->config->server_info->primary == NULL ? 0 :
867 server->config->server_info->primary->port);
870 silc_dlist_add(server->listeners, listener);
872 /* Create a Server ID for the server. */
873 port = silc_net_listener_get_port(listener, NULL);
874 ip = silc_net_listener_get_ip(listener, NULL);
875 external_ip = server->config->server_info->external_ip ?
876 server->config->server_info->external_ip :
877 server->config->server_info->primary->public_ip;
878 silc_id_create_server_id(external_ip ?
880 ip[0], port[0], server->rng, &id);
889 server->server_name = server->config->server_info->server_name;
890 server->config->server_info->server_name = NULL;
891 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
892 sizeof(server->id_string), &server->id_string_len);
894 /* Add ourselves to the server list. We don't have a router yet
895 beacuse we haven't established a route yet. It will be done later.
896 For now, NULL is sent as router. This allocates new entry to
899 silc_idlist_add_server(server->local_list, strdup(server->server_name),
901 silc_id_dup(server->id, SILC_ID_SERVER),
904 SILC_LOG_ERROR(("Could not add local server to cache"));
907 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
908 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
909 SILC_CONN_SERVER : SILC_CONN_ROUTER);
910 server->id_entry = id_entry;
912 /* Create secondary TCP listeners */
913 if (silc_server_init_secondary(server) == FALSE)
916 server->listenning = TRUE;
918 /* Create connections to configured routers. */
919 silc_server_create_connections(server);
921 /* If server connections has been configured then we must be router as
922 normal server cannot have server connections, only router connections. */
923 if (server->config->servers) {
924 SilcServerConfigServer *ptr = server->config->servers;
926 server->server_type = SILC_ROUTER;
928 if (ptr->backup_router) {
929 server->server_type = SILC_BACKUP_ROUTER;
930 server->backup_router = TRUE;
931 server->id_entry->server_type = SILC_BACKUP_ROUTER;
938 if (server->server_type != SILC_ROUTER) {
939 server->stat.servers = 1;
940 server->stat.cell_servers = 1;
942 server->stat.routers = 1;
945 /* If we are normal server we'll retrieve network statisticial information
946 once in a while from the router. */
947 if (server->server_type != SILC_ROUTER)
948 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
951 /* Start packet engine */
952 server->packet_engine =
953 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
954 &silc_server_stream_cbs, server);
955 if (!server->packet_engine)
958 /* Register client entry expiration timeout */
959 silc_schedule_task_add_timeout(server->schedule,
960 silc_server_purge_expired_clients, server,
963 /* Initialize HTTP server */
964 silc_server_http_init(server);
966 SILC_LOG_DEBUG(("Server initialized"));
968 /* We are done here, return succesfully */
972 silc_server_config_unref(&server->config_ref);
976 /* Task callback to close a socket connection after rehash */
978 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
980 SilcServer server = app_context;
981 SilcPacketStream sock = context;
982 SilcIDListData idata = silc_packet_get_context(sock);
983 const char *hostname;
986 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
987 NULL, &hostname, NULL, &port);
989 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
990 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
991 silc_schedule_task_del_by_context(server->schedule, sock);
992 silc_server_disconnect_remote(server, sock,
993 SILC_STATUS_ERR_BANNED_FROM_SERVER,
994 "This connection is removed from "
996 silc_server_free_sock_user_data(server, sock, NULL);
999 /* This function basically reads the config file again and switches the config
1000 object pointed by the server object. After that, we have to fix various
1001 things such as the server_name and the listening ports.
1002 Keep in mind that we no longer have the root privileges at this point. */
1004 SilcBool silc_server_rehash(SilcServer server)
1006 SilcServerConfig newconfig;
1008 SILC_LOG_INFO(("Rehashing server"));
1010 /* Reset the logging system */
1011 silc_log_quick(TRUE);
1012 silc_log_flush_all();
1014 /* Start the main rehash phase (read again the config file) */
1015 newconfig = silc_server_config_alloc(server->config_file, server);
1017 SILC_LOG_ERROR(("Rehash FAILED."));
1021 /* Fix the server_name field */
1022 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1023 silc_free(server->server_name);
1025 /* Check server name */
1026 server->server_name =
1027 silc_identifier_check(newconfig->server_info->server_name,
1028 strlen(newconfig->server_info->server_name),
1029 SILC_STRING_LOCALE, 256, NULL);
1030 if (!server->server_name) {
1031 SILC_LOG_ERROR(("Malformed server name string '%s'",
1032 server->config->server_info->server_name));
1036 /* Update the idcache list with a fresh pointer */
1037 silc_free(server->id_entry->server_name);
1038 server->id_entry->server_name = strdup(server->server_name);
1039 silc_idcache_update_by_context(server->local_list->servers,
1040 server->id_entry, NULL,
1041 strdup(server->id_entry->server_name),
1046 silc_server_config_setlogfiles(server);
1048 /* Change new key pair if necessary */
1049 if (newconfig->server_info->public_key &&
1050 !silc_pkcs_public_key_compare(server->public_key,
1051 newconfig->server_info->public_key)) {
1052 silc_pkcs_public_key_free(server->public_key);
1053 silc_pkcs_private_key_free(server->private_key);
1054 server->public_key = newconfig->server_info->public_key;
1055 server->private_key = newconfig->server_info->private_key;
1056 newconfig->server_info->public_key = NULL;
1057 newconfig->server_info->private_key = NULL;
1060 /* Check for unconfigured server and router connections and close
1061 connections that were unconfigured. */
1063 if (server->config->routers) {
1064 SilcServerConfigRouter *ptr;
1065 SilcServerConfigRouter *newptr;
1068 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1071 /* Check whether new config has this one too */
1072 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1073 if (silc_string_compare(newptr->host, ptr->host) &&
1074 newptr->port == ptr->port &&
1075 newptr->initiator == ptr->initiator) {
1081 if (!found && ptr->host) {
1082 /* Remove this connection */
1083 SilcPacketStream sock;
1084 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1085 ptr->host, ptr->port);
1087 silc_schedule_task_add_timeout(server->schedule,
1088 silc_server_rehash_close_connection,
1094 if (server->config->servers) {
1095 SilcServerConfigServer *ptr;
1096 SilcServerConfigServer *newptr;
1099 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1102 /* Check whether new config has this one too */
1103 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1104 if (silc_string_compare(newptr->host, ptr->host)) {
1110 if (!found && ptr->host) {
1111 /* Remove this connection */
1112 SilcPacketStream sock;
1113 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1116 silc_schedule_task_add_timeout(server->schedule,
1117 silc_server_rehash_close_connection,
1123 if (server->config->clients) {
1124 SilcServerConfigClient *ptr;
1125 SilcServerConfigClient *newptr;
1128 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1131 /* Check whether new config has this one too */
1132 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1133 if (silc_string_compare(newptr->host, ptr->host)) {
1139 if (!found && ptr->host) {
1140 /* Remove this connection */
1141 SilcPacketStream sock;
1142 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1145 silc_schedule_task_add_timeout(server->schedule,
1146 silc_server_rehash_close_connection,
1152 /* Create connections after rehash */
1153 silc_server_create_connections(server);
1155 /* Check whether our router status has changed */
1156 if (newconfig->servers) {
1157 SilcServerConfigServer *ptr = newconfig->servers;
1159 server->server_type = SILC_ROUTER;
1161 if (ptr->backup_router) {
1162 server->server_type = SILC_BACKUP_ROUTER;
1163 server->backup_router = TRUE;
1164 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1171 /* Our old config is gone now. We'll unreference our reference made in
1172 silc_server_init and then destroy it since we are destroying it
1173 underneath the application (layer which called silc_server_init). */
1174 silc_server_config_unref(&server->config_ref);
1175 silc_server_config_destroy(server->config);
1177 /* Take new config context */
1178 server->config = newconfig;
1179 silc_server_config_ref(&server->config_ref, server->config, server->config);
1182 /* Set debugging on if configured */
1183 if (server->config->debug_string) {
1184 silc_log_debug(TRUE);
1185 silc_log_set_debug_string(server->config->debug_string);
1187 #endif /* SILC_DEBUG */
1189 SILC_LOG_DEBUG(("Server rehashed"));
1194 /* The heart of the server. This runs the scheduler thus runs the server.
1195 When this returns the server has been stopped and the program will
1198 void silc_server_run(SilcServer server)
1200 SILC_LOG_INFO(("SILC Server started"));
1202 /* Start the scheduler, the heart of the SILC server. When this returns
1203 the program will be terminated. */
1204 silc_schedule(server->schedule);
1207 /* Stops the SILC server. This function is used to shutdown the server.
1208 This is usually called after the scheduler has returned. After stopping
1209 the server one should call silc_server_free. */
1211 void silc_server_stop(SilcServer server)
1214 SilcPacketStream ps;
1215 SilcNetListener listener;
1217 SILC_LOG_INFO(("SILC Server shutting down"));
1219 server->server_shutdown = TRUE;
1221 /* Close all connections */
1222 if (server->packet_engine) {
1223 list = silc_packet_engine_get_streams(server->packet_engine);
1225 silc_dlist_start(list);
1226 while ((ps = silc_dlist_get(list))) {
1227 SilcIDListData idata = silc_packet_get_context(ps);
1229 if (!silc_packet_stream_is_valid(ps))
1233 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1235 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1236 "Server is shutting down");
1237 silc_server_free_sock_user_data(server, ps,
1238 "Server is shutting down");
1240 silc_packet_engine_free_streams_list(list);
1243 /* We are not connected to network anymore */
1244 server->standalone = TRUE;
1246 silc_dlist_start(server->listeners);
1247 while ((listener = silc_dlist_get(server->listeners)))
1248 silc_net_close_listener(listener);
1250 silc_server_http_uninit(server);
1252 /* Cancel any possible retry timeouts */
1253 silc_schedule_task_del_by_callback(server->schedule,
1254 silc_server_connect_router);
1255 silc_schedule_task_del_by_callback(server->schedule,
1256 silc_server_connect_to_router_retry);
1257 silc_schedule_task_del_by_callback(server->schedule,
1258 silc_server_connect_to_router);
1260 silc_schedule_stop(server->schedule);
1262 SILC_LOG_DEBUG(("Server stopped"));
1265 /* Purge expired client entries from the server */
1267 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1269 SilcServer server = context;
1270 SilcClientEntry client;
1272 SilcUInt64 curtime = silc_time();
1274 SILC_LOG_DEBUG(("Expire timeout"));
1276 silc_dlist_start(server->expired_clients);
1277 while ((client = silc_dlist_get(server->expired_clients))) {
1278 /* For unregistered clients the created timestamp is actually
1279 unregistered timestamp. Make sure client remains in history
1280 at least 500 seconds. */
1281 if (client->data.created && curtime - client->data.created < 500)
1284 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1285 server->local_list : server->global_list);
1287 silc_idlist_del_data(client);
1288 silc_idlist_del_client(id_list, client);
1289 silc_dlist_del(server->expired_clients, client);
1292 silc_schedule_task_add_timeout(server->schedule,
1293 silc_server_purge_expired_clients, server,
1298 /******************************* Connecting *********************************/
1300 /* Free connection context */
1302 void silc_server_connection_free(SilcServerConnection sconn)
1306 SILC_LOG_DEBUG(("Free connection %p", sconn));
1307 silc_dlist_del(sconn->server->conns, sconn);
1308 silc_server_config_unref(&sconn->conn);
1309 silc_free(sconn->remote_host);
1310 silc_free(sconn->backup_replace_ip);
1314 /* Creates connection to a remote router. */
1316 void silc_server_create_connection(SilcServer server,
1319 const char *remote_host, SilcUInt32 port,
1320 SilcServerConnectCallback callback,
1323 SilcServerConnection sconn;
1325 /* Allocate connection object for hold connection specific stuff. */
1326 sconn = silc_calloc(1, sizeof(*sconn));
1329 sconn->remote_host = strdup(remote_host);
1330 sconn->remote_port = port;
1331 sconn->no_reconnect = reconnect == FALSE;
1332 sconn->callback = callback;
1333 sconn->callback_context = context;
1334 sconn->no_conf = dynamic;
1335 sconn->server = server;
1337 SILC_LOG_DEBUG(("Created connection %p to %s:%d", sconn,
1338 remote_host, port));
1340 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1344 /* Connection authentication completion callback */
1347 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1350 SilcServerConnection sconn = context;
1351 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1352 SilcServer server = entry->server;
1353 SilcServerConfigServer *conn;
1354 SilcServerConfigConnParams *param;
1355 SilcIDListData idata;
1356 SilcServerEntry id_entry = NULL;
1357 unsigned char id[32];
1362 SILC_LOG_DEBUG(("Connection %p authentication completed, entry %p",
1367 if (success == FALSE) {
1368 /* Authentication failed */
1370 /* Try reconnecting if configuration wants it */
1371 if (!sconn->no_reconnect) {
1372 silc_schedule_task_add_timeout(server->schedule,
1373 silc_server_connect_to_router_retry,
1375 silc_dlist_del(server->conns, sconn);
1379 if (sconn->callback)
1380 (*sconn->callback)(server, NULL, sconn->callback_context);
1381 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1382 silc_server_disconnect_remote(server, sconn->sock,
1383 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1387 /* XXX For now remote is router always */
1388 entry->data.conn_type = SILC_CONN_ROUTER;
1390 SILC_LOG_INFO(("Connected to %s %s",
1391 SILC_CONNTYPE_STRING(entry->data.conn_type),
1392 sconn->remote_host));
1394 /* Create the actual entry for remote entity */
1395 switch (entry->data.conn_type) {
1396 case SILC_CONN_SERVER:
1397 SILC_LOG_DEBUG(("Remote is SILC server"));
1399 /* Add new server. The server must register itself to us before it
1400 becomes registered to SILC network. */
1401 id_entry = silc_idlist_add_server(server->local_list,
1402 strdup(sconn->remote_host),
1403 SILC_SERVER, NULL, NULL, sconn->sock);
1405 if (sconn->callback)
1406 (*sconn->callback)(server, NULL, sconn->callback_context);
1407 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1408 silc_server_disconnect_remote(server, sconn->sock,
1409 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1414 server->stat.my_servers++;
1415 if (server->server_type == SILC_ROUTER)
1416 server->stat.servers++;
1417 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1419 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1422 case SILC_CONN_ROUTER:
1423 SILC_LOG_DEBUG(("Remote is SILC router"));
1425 /* Register to network */
1426 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1427 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1428 SILC_STR_UI_SHORT(id_len),
1429 SILC_STR_DATA(id, id_len),
1430 SILC_STR_UI_SHORT(strlen(server->server_name)),
1431 SILC_STR_DATA(server->server_name,
1432 strlen(server->server_name)),
1434 if (sconn->callback)
1435 (*sconn->callback)(server, NULL, sconn->callback_context);
1436 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1437 silc_server_disconnect_remote(server, sconn->sock,
1438 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1443 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1445 /* Check that we do not have this ID already */
1446 id_entry = silc_idlist_find_server_by_id(server->local_list,
1447 &remote_id.u.server_id,
1450 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1452 id_entry = silc_idlist_find_server_by_id(server->global_list,
1453 &remote_id.u.server_id,
1456 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1460 SILC_LOG_DEBUG(("New server id(%s)",
1461 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1463 /* Add the connected router to global server list. Router is sent
1464 as NULL since it's local to us. */
1465 id_entry = silc_idlist_add_server(server->global_list,
1466 strdup(sconn->remote_host),
1468 silc_id_dup(&remote_id.u.server_id,
1472 /* Try reconnecting if configuration wants it */
1473 if (!sconn->no_reconnect) {
1474 silc_schedule_task_add_timeout(server->schedule,
1475 silc_server_connect_to_router_retry,
1477 silc_dlist_del(server->conns, sconn);
1481 if (sconn->callback)
1482 (*sconn->callback)(server, NULL, sconn->callback_context);
1483 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1484 silc_server_disconnect_remote(server, sconn->sock,
1485 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1490 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1491 idata = (SilcIDListData)id_entry;
1492 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1493 SILC_IDLIST_STATUS_LOCAL);
1494 idata->sconn = sconn;
1495 idata->sconn->callback = NULL;
1498 server->stat.my_routers++;
1499 if (server->server_type == SILC_ROUTER)
1500 server->stat.routers++;
1501 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1503 if (!sconn->backup) {
1504 /* Mark this router our primary router if we're still standalone */
1505 if (server->standalone) {
1506 SILC_LOG_DEBUG(("This connection is our primary router"));
1507 server->id_entry->router = id_entry;
1508 server->router = id_entry;
1509 server->router->server_type = SILC_ROUTER;
1510 server->standalone = FALSE;
1511 server->backup_primary = FALSE;
1513 /* Announce data if we are not backup router (unless not as primary
1514 currently). Backup router announces later at the end of
1515 resuming protocol. */
1516 if (server->backup_router && server->server_type == SILC_ROUTER) {
1517 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1519 /* If we are router then announce our possible servers. Backup
1520 router announces also global servers. */
1521 if (server->server_type == SILC_ROUTER)
1522 silc_server_announce_servers(server,
1523 server->backup_router ? TRUE : FALSE,
1524 0, SILC_PRIMARY_ROUTE(server));
1526 /* Announce our clients and channels to the router */
1527 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1528 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1531 /* If we are backup router then this primary router is whom we are
1533 if (server->server_type == SILC_BACKUP_ROUTER) {
1534 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1536 NULL, NULL, &ip, NULL);
1537 silc_server_backup_add(server, server->id_entry, ip,
1538 sconn->remote_port, TRUE);
1543 /* We already have primary router. Disconnect this connection */
1544 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1545 silc_idlist_del_server(server->global_list, id_entry);
1546 if (sconn->callback)
1547 (*sconn->callback)(server, NULL, sconn->callback_context);
1548 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1549 silc_server_disconnect_remote(server, sconn->sock,
1550 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1555 /* Add this server to be our backup router */
1556 id_entry->server_type = SILC_BACKUP_ROUTER;
1557 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1558 sconn->backup_replace_port, FALSE);
1564 if (sconn->callback)
1565 (*sconn->callback)(server, NULL, sconn->callback_context);
1566 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1567 silc_server_disconnect_remote(server, sconn->sock,
1568 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1572 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1574 conn = sconn->conn.ref_ptr;
1575 param = &server->config->param;
1576 if (conn && conn->param)
1577 param = conn->param;
1579 /* Register rekey timeout */
1580 sconn->rekey_timeout = param->key_exchange_rekey;
1581 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1582 sconn->sock, sconn->rekey_timeout, 0);
1584 /* Set the entry as packet stream context */
1585 silc_packet_set_context(sconn->sock, id_entry);
1587 /* Call the completion callback to indicate that we've connected to
1589 if (sconn && sconn->callback)
1590 (*sconn->callback)(server, id_entry, sconn->callback_context);
1592 if (sconn == server->router_conn)
1593 server->router_conn = NULL;
1598 /* SKE completion callback */
1600 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1601 SilcSKESecurityProperties prop,
1602 SilcSKEKeyMaterial keymat,
1603 SilcSKERekeyMaterial rekey,
1606 SilcPacketStream sock = context;
1607 SilcUnknownEntry entry = silc_packet_get_context(sock);
1608 SilcServerConnection sconn;
1610 SilcServerConfigRouter *conn;
1611 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1612 void *auth_data = NULL;
1613 SilcUInt32 auth_data_len = 0;
1614 SilcConnAuth connauth;
1615 SilcCipher send_key, receive_key;
1616 SilcHmac hmac_send, hmac_receive;
1618 server = entry->server;
1619 sconn = entry->data.sconn;
1620 conn = sconn->conn.ref_ptr;
1623 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1625 if (status != SILC_SKE_STATUS_OK) {
1627 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1628 silc_ske_map_status(status), entry->hostname, entry->ip));
1631 /* Try reconnecting if configuration wants it */
1632 if (!sconn->no_reconnect) {
1633 silc_schedule_task_add_timeout(server->schedule,
1634 silc_server_connect_to_router_retry,
1636 silc_dlist_del(server->conns, sconn);
1640 if (sconn->callback)
1641 (*sconn->callback)(server, NULL, sconn->callback_context);
1642 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1643 silc_server_disconnect_remote(server, sconn->sock,
1644 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1648 SILC_LOG_DEBUG(("Setting keys into use"));
1650 /* Set the keys into use. The data will be encrypted after this. */
1651 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1652 &hmac_send, &hmac_receive, NULL)) {
1655 /* Try reconnecting if configuration wants it */
1656 if (!sconn->no_reconnect) {
1657 silc_schedule_task_add_timeout(server->schedule,
1658 silc_server_connect_to_router_retry,
1660 silc_dlist_del(server->conns, sconn);
1664 /* Error setting keys */
1665 if (sconn->callback)
1666 (*sconn->callback)(server, NULL, sconn->callback_context);
1667 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1668 silc_server_disconnect_remote(server, sconn->sock,
1669 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1672 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1673 hmac_receive, FALSE);
1675 SILC_LOG_DEBUG(("Starting connection authentication"));
1677 connauth = silc_connauth_alloc(server->schedule, ske,
1678 server->config->conn_auth_timeout);
1682 /* Try reconnecting if configuration wants it */
1683 if (!sconn->no_reconnect) {
1684 silc_schedule_task_add_timeout(server->schedule,
1685 silc_server_connect_to_router_retry,
1687 silc_dlist_del(server->conns, sconn);
1691 /** Error allocating auth protocol */
1692 if (sconn->callback)
1693 (*sconn->callback)(server, NULL, sconn->callback_context);
1694 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1695 silc_server_disconnect_remote(server, sconn->sock,
1696 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1700 /* Get authentication method */
1702 if (conn->passphrase) {
1703 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1704 auth_meth = SILC_AUTH_PUBLIC_KEY;
1705 auth_data = server->private_key;
1707 auth_meth = SILC_AUTH_PASSWORD;
1708 auth_data = conn->passphrase;
1709 auth_data_len = conn->passphrase_len;
1712 auth_meth = SILC_AUTH_PUBLIC_KEY;
1713 auth_data = server->private_key;
1717 entry->data.rekey = rekey;
1719 /* Start connection authentication */
1721 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1722 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1723 auth_data, auth_data_len,
1724 silc_server_ke_auth_compl, sconn);
1727 /* Function that is called when the network connection to a router has
1728 been established. This will continue with the key exchange protocol
1729 with the remote router. */
1731 void silc_server_start_key_exchange(SilcServerConnection sconn)
1733 SilcServer server = sconn->server;
1734 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1735 SilcUnknownEntry entry;
1736 SilcSKEParamsStruct params;
1739 /* Cancel any possible retry timeouts */
1740 silc_schedule_task_del_by_context(server->schedule, sconn);
1742 /* Create packet stream */
1743 sconn->sock = silc_packet_stream_create(server->packet_engine,
1744 server->schedule, sconn->stream);
1746 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1747 silc_stream_destroy(sconn->stream);
1749 /* Try reconnecting if configuration wants it */
1750 if (!sconn->no_reconnect) {
1751 silc_schedule_task_add_timeout(server->schedule,
1752 silc_server_connect_to_router_retry,
1754 silc_dlist_del(server->conns, sconn);
1758 if (sconn->callback)
1759 (*sconn->callback)(server, NULL, sconn->callback_context);
1760 silc_server_connection_free(sconn);
1763 server->stat.conn_num++;
1765 /* Set source ID to packet stream */
1766 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1768 silc_packet_stream_destroy(sconn->sock);
1770 /* Try reconnecting if configuration wants it */
1771 if (!sconn->no_reconnect) {
1772 silc_schedule_task_add_timeout(server->schedule,
1773 silc_server_connect_to_router_retry,
1775 silc_dlist_del(server->conns, sconn);
1779 if (sconn->callback)
1780 (*sconn->callback)(server, NULL, sconn->callback_context);
1781 silc_server_connection_free(sconn);
1785 /* Create entry for remote entity */
1786 entry = silc_calloc(1, sizeof(*entry));
1788 silc_packet_stream_destroy(sconn->sock);
1790 /* Try reconnecting if configuration wants it */
1791 if (!sconn->no_reconnect) {
1792 silc_schedule_task_add_timeout(server->schedule,
1793 silc_server_connect_to_router_retry,
1795 silc_dlist_del(server->conns, sconn);
1799 if (sconn->callback)
1800 (*sconn->callback)(server, NULL, sconn->callback_context);
1801 silc_server_connection_free(sconn);
1804 entry->server = server;
1805 entry->data.sconn = sconn;
1806 silc_packet_set_context(sconn->sock, entry);
1808 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1810 /* Set Key Exchange flags from configuration, but fall back to global
1812 memset(¶ms, 0, sizeof(params));
1813 SILC_GET_SKE_FLAGS(conn, params.flags);
1814 if (server->config->param.key_exchange_pfs)
1815 params.flags |= SILC_SKE_SP_FLAG_PFS;
1817 /* Start SILC Key Exchange protocol */
1818 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1819 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1820 server->public_key, server->private_key, sconn);
1823 silc_packet_stream_destroy(sconn->sock);
1825 /* Try reconnecting if configuration wants it */
1826 if (!sconn->no_reconnect) {
1827 silc_schedule_task_add_timeout(server->schedule,
1828 silc_server_connect_to_router_retry,
1830 silc_dlist_del(server->conns, sconn);
1834 if (sconn->callback)
1835 (*sconn->callback)(server, NULL, sconn->callback_context);
1836 silc_server_connection_free(sconn);
1839 silc_ske_set_callbacks(ske, silc_server_verify_key,
1840 silc_server_ke_completed, sconn->sock);
1842 /* Start key exchange protocol */
1843 params.version = silc_version_string;
1844 params.timeout_secs = server->config->key_exchange_timeout;
1845 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1848 /* Timeout callback that will be called to retry connecting to remote
1849 router. This is used by both normal and router server. This will wait
1850 before retrying the connecting. The timeout is generated by exponential
1851 backoff algorithm. */
1853 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1855 SilcServerConnection sconn = context;
1856 SilcServer server = sconn->server;
1857 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1858 SilcServerConfigConnParams *param =
1859 (conn->param ? conn->param : &server->config->param);
1861 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1862 sconn->remote_port));
1864 /* Calculate next timeout */
1865 if (sconn->retry_count >= 1) {
1866 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1867 if (sconn->retry_timeout > param->reconnect_interval_max)
1868 sconn->retry_timeout = param->reconnect_interval_max;
1870 sconn->retry_timeout = param->reconnect_interval;
1872 sconn->retry_count++;
1873 sconn->retry_timeout = sconn->retry_timeout +
1874 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1876 /* If we've reached max retry count, give up. */
1877 if ((sconn->retry_count > param->reconnect_count) &&
1878 sconn->no_reconnect) {
1879 SILC_LOG_ERROR(("Could not connect, giving up"));
1881 if (sconn->callback)
1882 (*sconn->callback)(server, NULL, sconn->callback_context);
1883 silc_server_connection_free(sconn);
1887 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1889 /* We will lookup a fresh pointer later */
1890 silc_server_config_unref(&sconn->conn);
1892 /* Wait before retrying */
1893 silc_schedule_task_del_by_context(server->schedule, sconn);
1894 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1895 sconn, sconn->retry_timeout, 0);
1898 /* Callback for async connection to remote router */
1900 static void silc_server_connection_established(SilcNetStatus status,
1904 SilcServerConnection sconn = context;
1905 SilcServer server = sconn->server;
1907 silc_schedule_task_del_by_context(server->schedule, sconn);
1912 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1913 sconn->remote_host, sconn->remote_port));
1915 /* Continue with key exchange protocol */
1916 sconn->stream = stream;
1917 silc_server_start_key_exchange(sconn);
1920 case SILC_NET_UNKNOWN_IP:
1921 case SILC_NET_UNKNOWN_HOST:
1922 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1923 sconn->remote_host, sconn->remote_port,
1924 silc_net_get_error_string(status)));
1925 if (!sconn->no_reconnect) {
1926 silc_schedule_task_add_timeout(sconn->server->schedule,
1927 silc_server_connect_to_router_retry,
1929 silc_dlist_del(server->conns, sconn);
1931 if (sconn->callback)
1932 (*sconn->callback)(server, NULL, sconn->callback_context);
1933 silc_server_connection_free(sconn);
1938 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1939 sconn->remote_host, sconn->remote_port,
1940 silc_net_get_error_string(status)));
1941 if (!sconn->no_reconnect) {
1942 silc_schedule_task_add_timeout(sconn->server->schedule,
1943 silc_server_connect_to_router_retry,
1945 silc_dlist_del(server->conns, sconn);
1947 if (sconn->callback)
1948 (*sconn->callback)(server, NULL, sconn->callback_context);
1949 silc_server_connection_free(sconn);
1955 /* Generic routine to use connect to a router. */
1957 SILC_TASK_CALLBACK(silc_server_connect_router)
1959 SilcServerConnection sconn = context;
1960 SilcServer server = sconn->server;
1961 SilcServerConfigRouter *rconn;
1963 silc_schedule_task_del_by_context(server->schedule, sconn);
1965 /* Don't connect if we are shutting down. */
1966 if (server->server_shutdown) {
1967 if (sconn->callback)
1968 (*sconn->callback)(server, NULL, sconn->callback_context);
1969 silc_server_connection_free(sconn);
1973 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1974 (sconn->backup ? "backup router" : "router"),
1975 sconn->remote_host, sconn->remote_port));
1977 if (!sconn->no_conf) {
1978 /* Find connection configuration */
1979 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1980 sconn->remote_port);
1982 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1983 (sconn->backup ? "backup router" : "router"),
1984 sconn->remote_host, sconn->remote_port));
1985 if (sconn->callback)
1986 (*sconn->callback)(server, NULL, sconn->callback_context);
1987 silc_server_connection_free(sconn);
1990 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1993 /* Connect to remote host */
1995 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1996 server->config->server_info->primary->server_ip),
1997 sconn->remote_host, sconn->remote_port,
1998 server->schedule, silc_server_connection_established,
2001 SILC_LOG_ERROR(("Could not connect to router %s:%d",
2002 sconn->remote_host, sconn->remote_port));
2003 if (sconn->callback)
2004 (*sconn->callback)(server, NULL, sconn->callback_context);
2005 silc_server_connection_free(sconn);
2009 /* Add to connection list */
2010 silc_dlist_add(server->conns, sconn);
2013 /* This function connects to our primary router or if we are a router this
2014 establishes all our primary routes. This is called at the start of the
2015 server to do authentication and key exchange with our router - called
2018 SILC_TASK_CALLBACK(silc_server_connect_to_router)
2020 SilcServer server = context;
2021 SilcServerConnection sconn;
2022 SilcServerConfigRouter *ptr;
2023 SilcServerConfigConnParams *param;
2025 /* Don't connect if we are shutting down. */
2026 if (server->server_shutdown)
2029 SILC_LOG_DEBUG(("We are %s",
2030 (server->server_type == SILC_SERVER ?
2031 "normal server" : server->server_type == SILC_ROUTER ?
2032 "router" : "backup router/normal server")));
2034 if (!server->config->routers) {
2035 /* There wasn't a configured router, we will continue but we don't
2036 have a connection to outside world. We will be standalone server. */
2037 SILC_LOG_DEBUG(("No router(s), we are standalone"));
2038 server->standalone = TRUE;
2042 /* Cancel any possible retry timeouts */
2043 silc_schedule_task_del_by_callback(server->schedule,
2044 silc_server_connect_router);
2045 silc_schedule_task_del_by_callback(server->schedule,
2046 silc_server_connect_to_router_retry);
2048 /* Create the connections to all our routes */
2049 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
2051 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
2052 ptr->backup_router ? "Backup router" : "Router",
2053 ptr->initiator ? "Initiator" : "Responder",
2054 ptr->host, ptr->port));
2056 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
2057 ptr->initiator == FALSE && !server->backup_router &&
2058 !silc_server_config_get_backup_router(server))
2059 server->wait_backup = TRUE;
2061 if (!ptr->initiator)
2063 if (ptr->dynamic_connection)
2066 /* Check whether we are connecting or connected to this host already */
2067 if (silc_server_num_sockets_by_remote(server,
2068 silc_net_is_ip(ptr->host) ?
2070 silc_net_is_ip(ptr->host) ?
2071 NULL : ptr->host, ptr->port,
2072 SILC_CONN_ROUTER)) {
2073 SILC_LOG_DEBUG(("We are already connected to %s:%d",
2074 ptr->host, ptr->port));
2076 /* If we don't have primary router and this connection is our
2077 primary router we are in desync. Reconnect to the primary. */
2078 if (server->standalone && !server->router) {
2080 SilcPacketStream sock;
2081 SilcServerConfigRouter *primary =
2082 silc_server_config_get_primary_router(server);
2085 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
2086 ptr->host, ptr->port);
2089 server->backup_noswitch = TRUE;
2090 silc_server_free_sock_user_data(server, sock, NULL);
2091 silc_server_disconnect_remote(server, sock, 0, NULL);
2092 server->backup_noswitch = FALSE;
2093 SILC_LOG_DEBUG(("Reconnecting to primary router"));
2099 param = (ptr->param ? ptr->param : &server->config->param);
2101 /* Allocate connection object for hold connection specific stuff. */
2102 sconn = silc_calloc(1, sizeof(*sconn));
2105 sconn->server = server;
2106 sconn->remote_host = strdup(ptr->host);
2107 sconn->remote_port = ptr->port;
2108 sconn->backup = ptr->backup_router;
2109 if (sconn->backup) {
2110 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2111 sconn->backup_replace_port = ptr->backup_replace_port;
2113 sconn->no_reconnect = param->reconnect_keep_trying == FALSE;
2115 SILC_LOG_DEBUG(("Created connection %p", sconn));
2117 if (!server->router_conn && !sconn->backup)
2118 server->router_conn = sconn;
2121 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2127 /************************ Accepting new connection **************************/
2129 /* After this is called, server don't wait for backup router anymore.
2130 This gets called automatically even after we have backup router
2131 connection established. */
2133 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2135 SilcServer server = context;
2136 server->wait_backup = FALSE;
2139 /* Authentication data callback */
2142 silc_server_accept_get_auth(SilcConnAuth connauth,
2143 SilcConnectionType conn_type,
2144 unsigned char **passphrase,
2145 SilcUInt32 *passphrase_len,
2146 SilcSKR *repository,
2149 SilcPacketStream sock = context;
2150 SilcUnknownEntry entry = silc_packet_get_context(sock);
2151 SilcServer server = entry->server;
2153 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2155 /* Remote end is client */
2156 if (conn_type == SILC_CONN_CLIENT) {
2157 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2161 *passphrase = cconfig->passphrase;
2162 *passphrase_len = cconfig->passphrase_len;
2163 if (cconfig->publickeys)
2164 *repository = server->repository;
2166 if (cconfig->publickeys) {
2167 if (server->config->prefer_passphrase_auth) {
2171 *passphrase_len = 0;
2175 entry->conn_type = conn_type;
2179 /* Remote end is server */
2180 if (conn_type == SILC_CONN_SERVER) {
2181 SilcServerConfigServer *sconfig;
2183 /* If we are normal server, don't accept the connection */
2184 if (server->server_type == SILC_SERVER)
2187 sconfig = entry->sconfig.ref_ptr;
2191 *passphrase = sconfig->passphrase;
2192 *passphrase_len = sconfig->passphrase_len;
2193 if (sconfig->publickeys)
2194 *repository = server->repository;
2196 if (sconfig->publickeys) {
2197 if (server->config->prefer_passphrase_auth) {
2201 *passphrase_len = 0;
2205 entry->conn_type = conn_type;
2209 /* Remote end is router */
2210 if (conn_type == SILC_CONN_ROUTER) {
2211 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2215 *passphrase = rconfig->passphrase;
2216 *passphrase_len = rconfig->passphrase_len;
2217 if (rconfig->publickeys)
2218 *repository = server->repository;
2220 if (rconfig->publickeys) {
2221 if (server->config->prefer_passphrase_auth) {
2225 *passphrase_len = 0;
2229 entry->conn_type = conn_type;
2236 /* Authentication completion callback. */
2239 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2242 SilcPacketStream sock = context;
2243 SilcUnknownEntry entry = silc_packet_get_context(sock);
2244 SilcIDListData idata = (SilcIDListData)entry;
2245 SilcServer server = entry->server;
2246 SilcServerConfigConnParams *param = &server->config->param;
2247 SilcServerConnection sconn;
2249 const char *hostname, *ip;
2253 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2254 NULL, &hostname, &ip, &port);
2256 if (success == FALSE) {
2257 /* Authentication failed */
2258 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2259 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2260 server->stat.auth_failures++;
2261 silc_server_disconnect_remote(server, sock,
2262 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2263 silc_server_config_unref(&entry->cconfig);
2264 silc_server_config_unref(&entry->sconfig);
2265 silc_server_config_unref(&entry->rconfig);
2266 silc_server_free_sock_user_data(server, sock, NULL);
2270 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2272 switch (entry->conn_type) {
2273 case SILC_CONN_CLIENT:
2275 SilcClientEntry client;
2276 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2278 /* Verify whether this connection is after all allowed to connect */
2279 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2280 &server->config->param,
2282 silc_connauth_get_ske(connauth))) {
2283 server->stat.auth_failures++;
2287 /* If we are primary router and we have backup router configured
2288 but it has not connected to use yet, do not accept any other
2290 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2291 !server->backup_router) {
2292 SilcServerConfigRouter *router;
2293 router = silc_server_config_get_backup_router(server);
2294 if (router && strcmp(server->config->server_info->primary->server_ip,
2296 silc_server_find_socket_by_host(server,
2298 router->backup_replace_ip, 0)) {
2299 SILC_LOG_INFO(("Will not accept connections because we do "
2300 "not have backup router connection established"));
2301 silc_server_disconnect_remote(server, sock,
2302 SILC_STATUS_ERR_PERM_DENIED,
2303 "We do not have connection to backup "
2304 "router established, try later");
2305 silc_server_config_unref(&entry->cconfig);
2306 silc_server_config_unref(&entry->sconfig);
2307 silc_server_config_unref(&entry->rconfig);
2308 silc_server_free_sock_user_data(server, sock, NULL);
2309 server->stat.auth_failures++;
2311 /* From here on, wait 20 seconds for the backup router to appear. */
2312 silc_schedule_task_add_timeout(server->schedule,
2313 silc_server_backup_router_wait,
2314 (void *)server, 20, 0);
2319 SILC_LOG_DEBUG(("Remote host is client"));
2320 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2323 /* Add the client to the client ID cache. The nickname and Client ID
2324 and other information is created after we have received NEW_CLIENT
2325 packet from client. */
2326 client = silc_idlist_add_client(server->local_list,
2327 NULL, NULL, NULL, NULL, NULL, sock);
2329 SILC_LOG_ERROR(("Could not add new client to cache"));
2330 server->stat.auth_failures++;
2331 silc_server_disconnect_remote(server, sock,
2332 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2333 silc_server_config_unref(&entry->cconfig);
2334 silc_server_config_unref(&entry->sconfig);
2335 silc_server_config_unref(&entry->rconfig);
2336 silc_server_free_sock_user_data(server, sock, NULL);
2339 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2340 entry->data.conn_type = SILC_CONN_CLIENT;
2343 server->stat.my_clients++;
2344 server->stat.clients++;
2345 server->stat.cell_clients++;
2347 /* Get connection parameters */
2349 param = conn->param;
2351 if (!param->keepalive_secs)
2352 param->keepalive_secs = server->config->param.keepalive_secs;
2354 if (!param->qos && server->config->param.qos) {
2355 param->qos = server->config->param.qos;
2356 param->qos_rate_limit = server->config->param.qos_rate_limit;
2357 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2358 param->qos_limit_sec = server->config->param.qos_limit_sec;
2359 param->qos_limit_usec = server->config->param.qos_limit_usec;
2362 /* Check if to be anonymous connection */
2363 if (param->anonymous)
2364 client->mode |= SILC_UMODE_ANONYMOUS;
2367 /* Add public key to repository */
2368 SILC_LOG_DEBUG(("Add client public key to repository"));
2369 if (!silc_server_get_public_key_by_client(server, client, NULL))
2370 silc_skr_add_public_key_simple(server->repository,
2371 entry->data.public_key,
2372 SILC_SKR_USAGE_IDENTIFICATION, client,
2375 id_entry = (void *)client;
2379 case SILC_CONN_SERVER:
2380 case SILC_CONN_ROUTER:
2382 SilcServerEntry new_server;
2383 SilcBool initiator = FALSE;
2384 SilcBool backup_local = FALSE;
2385 SilcBool backup_router = FALSE;
2386 char *backup_replace_ip = NULL;
2387 SilcUInt16 backup_replace_port = 0;
2388 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2389 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2391 /* If we are backup router and this is incoming server connection
2392 and we do not have connection to primary router, do not allow
2394 if (server->server_type == SILC_BACKUP_ROUTER &&
2395 entry->conn_type == SILC_CONN_SERVER &&
2396 !SILC_PRIMARY_ROUTE(server)) {
2397 SILC_LOG_INFO(("Will not accept server connection because we do "
2398 "not have primary router connection established"));
2399 silc_server_disconnect_remote(server, sock,
2400 SILC_STATUS_ERR_PERM_DENIED,
2401 "We do not have connection to primary "
2402 "router established, try later");
2403 silc_server_config_unref(&entry->cconfig);
2404 silc_server_config_unref(&entry->sconfig);
2405 silc_server_config_unref(&entry->rconfig);
2406 silc_server_free_sock_user_data(server, sock, NULL);
2407 server->stat.auth_failures++;
2411 if (entry->conn_type == SILC_CONN_ROUTER) {
2412 /* Verify whether this connection is after all allowed to connect */
2413 if (!silc_server_connection_allowed(server, sock,
2415 &server->config->param,
2416 rconn ? rconn->param : NULL,
2417 silc_connauth_get_ske(connauth))) {
2418 silc_server_config_unref(&entry->cconfig);
2419 silc_server_config_unref(&entry->sconfig);
2420 silc_server_config_unref(&entry->rconfig);
2421 server->stat.auth_failures++;
2427 param = rconn->param;
2429 if (!param->keepalive_secs)
2430 param->keepalive_secs = server->config->param.keepalive_secs;
2432 if (!param->qos && server->config->param.qos) {
2433 param->qos = server->config->param.qos;
2434 param->qos_rate_limit = server->config->param.qos_rate_limit;
2435 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2436 param->qos_limit_sec = server->config->param.qos_limit_sec;
2437 param->qos_limit_usec = server->config->param.qos_limit_usec;
2441 initiator = rconn->initiator;
2442 backup_local = rconn->backup_local;
2443 backup_router = rconn->backup_router;
2444 backup_replace_ip = rconn->backup_replace_ip;
2445 backup_replace_port = rconn->backup_replace_port;
2449 if (entry->conn_type == SILC_CONN_SERVER) {
2450 /* Verify whether this connection is after all allowed to connect */
2451 if (!silc_server_connection_allowed(server, sock,
2453 &server->config->param,
2454 srvconn ? srvconn->param : NULL,
2455 silc_connauth_get_ske(connauth))) {
2456 server->stat.auth_failures++;
2460 if (srvconn->param) {
2461 param = srvconn->param;
2463 if (!param->keepalive_secs)
2464 param->keepalive_secs = server->config->param.keepalive_secs;
2466 if (!param->qos && server->config->param.qos) {
2467 param->qos = server->config->param.qos;
2468 param->qos_rate_limit = server->config->param.qos_rate_limit;
2469 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2470 param->qos_limit_sec = server->config->param.qos_limit_sec;
2471 param->qos_limit_usec = server->config->param.qos_limit_usec;
2475 backup_router = srvconn->backup_router;
2479 /* If we are primary router and we have backup router configured
2480 but it has not connected to use yet, do not accept any other
2482 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2483 !server->backup_router && !backup_router) {
2484 SilcServerConfigRouter *router;
2485 router = silc_server_config_get_backup_router(server);
2486 if (router && strcmp(server->config->server_info->primary->server_ip,
2488 silc_server_find_socket_by_host(server,
2490 router->backup_replace_ip, 0)) {
2491 SILC_LOG_INFO(("Will not accept connections because we do "
2492 "not have backup router connection established"));
2493 silc_server_disconnect_remote(server, sock,
2494 SILC_STATUS_ERR_PERM_DENIED,
2495 "We do not have connection to backup "
2496 "router established, try later");
2497 silc_server_config_unref(&entry->cconfig);
2498 silc_server_config_unref(&entry->sconfig);
2499 silc_server_config_unref(&entry->rconfig);
2500 silc_server_free_sock_user_data(server, sock, NULL);
2501 server->stat.auth_failures++;
2503 /* From here on, wait 20 seconds for the backup router to appear. */
2504 silc_schedule_task_add_timeout(server->schedule,
2505 silc_server_backup_router_wait,
2506 (void *)server, 20, 0);
2511 SILC_LOG_DEBUG(("Remote host is %s",
2512 entry->conn_type == SILC_CONN_SERVER ?
2513 "server" : (backup_router ?
2514 "backup router" : "router")));
2515 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2516 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2517 "server" : (backup_router ?
2518 "backup router" : "router")));
2520 /* Add the server into server cache. The server name and Server ID
2521 is updated after we have received NEW_SERVER packet from the
2522 server. We mark ourselves as router for this server if we really
2525 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2526 server->local_list : (backup_router ?
2527 server->local_list :
2528 server->global_list)),
2530 (entry->conn_type == SILC_CONN_SERVER ?
2531 SILC_SERVER : SILC_ROUTER),
2533 (entry->conn_type == SILC_CONN_SERVER ?
2534 server->id_entry : (backup_router ?
2535 server->id_entry : NULL)),
2538 SILC_LOG_ERROR(("Could not add new server to cache"));
2539 silc_server_disconnect_remote(server, sock,
2540 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2541 silc_server_config_unref(&entry->cconfig);
2542 silc_server_config_unref(&entry->sconfig);
2543 silc_server_config_unref(&entry->rconfig);
2544 silc_server_free_sock_user_data(server, sock, NULL);
2545 server->stat.auth_failures++;
2548 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2549 entry->data.conn_type = entry->conn_type;
2551 id_entry = (void *)new_server;
2553 /* If the incoming connection is router and marked as backup router
2554 then add it to be one of our backups */
2555 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2556 /* Change it back to SERVER type since that's what it really is. */
2558 entry->data.conn_type = SILC_CONN_SERVER;
2559 new_server->server_type = SILC_BACKUP_ROUTER;
2561 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2562 ("Backup router %s is now online",
2565 /* Remove the backup waiting with timeout */
2566 silc_schedule_task_add_timeout(server->schedule,
2567 silc_server_backup_router_wait,
2568 (void *)server, 10, 0);
2572 if (entry->data.conn_type == SILC_CONN_SERVER) {
2573 server->stat.my_servers++;
2574 server->stat.servers++;
2575 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2577 server->stat.my_routers++;
2578 server->stat.routers++;
2579 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2582 /* Check whether this connection is to be our primary router connection
2583 if we do not already have the primary route. */
2584 if (!backup_router &&
2585 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2586 if (silc_server_config_is_primary_route(server) && !initiator)
2589 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2590 server->standalone = FALSE;
2591 if (!server->id_entry->router) {
2592 server->id_entry->router = id_entry;
2593 server->router = id_entry;
2605 /* Add connection to server->conns so that we know we have connection
2607 sconn = silc_calloc(1, sizeof(*sconn));
2608 sconn->server = server;
2610 sconn->remote_host = strdup(hostname);
2611 sconn->remote_port = port;
2612 silc_dlist_add(server->conns, sconn);
2613 idata->sconn = sconn;
2614 idata->sconn->callback = NULL;
2615 idata->last_receive = time(NULL);
2617 /* Add the common data structure to the ID entry. */
2618 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2619 silc_packet_set_context(sock, id_entry);
2621 /* Connection has been fully established now. Everything is ok. */
2622 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2624 /* Perform Quality of Service */
2626 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2627 param->qos_rate_limit, param->qos_bytes_limit,
2628 param->qos_limit_sec, param->qos_limit_usec);
2630 silc_server_config_unref(&entry->cconfig);
2631 silc_server_config_unref(&entry->sconfig);
2632 silc_server_config_unref(&entry->rconfig);
2636 silc_ske_free(silc_connauth_get_ske(connauth));
2637 silc_connauth_free(connauth);
2640 /* SKE completion callback. We set the new keys into use here. */
2643 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2644 SilcSKESecurityProperties prop,
2645 SilcSKEKeyMaterial keymat,
2646 SilcSKERekeyMaterial rekey,
2649 SilcPacketStream sock = context;
2650 SilcUnknownEntry entry = silc_packet_get_context(sock);
2651 SilcIDListData idata = (SilcIDListData)entry;
2652 SilcServer server = entry->server;
2653 SilcConnAuth connauth;
2654 SilcCipher send_key, receive_key;
2655 SilcHmac hmac_send, hmac_receive;
2662 if (status != SILC_SKE_STATUS_OK) {
2664 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2665 silc_ske_map_status(status), entry->hostname, entry->ip));
2667 silc_server_disconnect_remote(server, sock,
2668 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2669 silc_server_config_unref(&entry->cconfig);
2670 silc_server_config_unref(&entry->sconfig);
2671 silc_server_config_unref(&entry->rconfig);
2672 silc_server_free_sock_user_data(server, sock, NULL);
2676 SILC_LOG_DEBUG(("Setting keys into use"));
2678 /* Set the keys into use. The data will be encrypted after this. */
2679 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2680 &hmac_send, &hmac_receive, &hash)) {
2681 /* Error setting keys */
2683 silc_server_disconnect_remote(server, sock,
2684 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2685 silc_server_free_sock_user_data(server, sock, NULL);
2688 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2689 hmac_receive, FALSE);
2691 idata->rekey = rekey;
2692 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2693 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2695 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2700 SILC_LOG_DEBUG(("Starting connection authentication"));
2701 server->stat.auth_attempts++;
2703 connauth = silc_connauth_alloc(server->schedule, ske,
2704 server->config->conn_auth_timeout);
2706 /** Error allocating auth protocol */
2708 silc_server_disconnect_remote(server, sock,
2709 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2710 silc_server_config_unref(&entry->cconfig);
2711 silc_server_config_unref(&entry->sconfig);
2712 silc_server_config_unref(&entry->rconfig);
2713 silc_server_free_sock_user_data(server, sock, NULL);
2717 /* Start connection authentication */
2719 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2720 silc_server_accept_auth_compl, sock);
2723 /* Accept new TCP connection */
2725 static void silc_server_accept_new_connection(SilcNetStatus status,
2729 SilcServer server = context;
2730 SilcPacketStream packet_stream;
2731 SilcServerConfigClient *cconfig = NULL;
2732 SilcServerConfigServer *sconfig = NULL;
2733 SilcServerConfigRouter *rconfig = NULL;
2734 SilcServerConfigDeny *deny;
2735 SilcUnknownEntry entry;
2737 SilcSKEParamsStruct params;
2738 char *hostname, *ip;
2741 SILC_LOG_DEBUG(("Accepting new connection"));
2743 /* Check for maximum allowed connections */
2744 server->stat.conn_attempts++;
2745 if (silc_dlist_count(server->conns) >
2746 server->config->param.connections_max) {
2747 SILC_LOG_ERROR(("Refusing connection, server is full"));
2748 server->stat.conn_failures++;
2749 silc_stream_destroy(stream);
2753 /* Get hostname, IP and port */
2754 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2755 (const char **)&ip, &port)) {
2756 /* Bad socket stream */
2757 server->stat.conn_failures++;
2758 silc_stream_destroy(stream);
2762 /* Create packet stream */
2763 packet_stream = silc_packet_stream_create(server->packet_engine,
2764 server->schedule, stream);
2765 if (!packet_stream) {
2766 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2767 server->stat.conn_failures++;
2768 silc_stream_destroy(stream);
2771 server->stat.conn_num++;
2773 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2775 /* Set source ID to packet stream */
2776 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2779 server->stat.conn_failures++;
2780 silc_packet_stream_destroy(packet_stream);
2784 /* Check whether this connection is denied to connect to us. */
2785 deny = silc_server_config_find_denied(server, ip);
2787 deny = silc_server_config_find_denied(server, hostname);
2789 /* The connection is denied */
2790 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2791 silc_server_disconnect_remote(server, packet_stream,
2792 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2794 silc_server_free_sock_user_data(server, packet_stream, NULL);
2798 /* Check whether we have configured this sort of connection at all. We
2799 have to check all configurations since we don't know what type of
2800 connection this is. */
2801 if (!(cconfig = silc_server_config_find_client(server, ip)))
2802 cconfig = silc_server_config_find_client(server, hostname);
2803 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2804 sconfig = silc_server_config_find_server_conn(server, hostname);
2805 if (server->server_type == SILC_ROUTER)
2806 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2807 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2808 if (!cconfig && !sconfig && !rconfig) {
2809 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2810 server->stat.conn_failures++;
2811 silc_server_disconnect_remote(server, packet_stream,
2812 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2813 silc_server_free_sock_user_data(server, packet_stream, NULL);
2817 /* The connection is allowed */
2818 entry = silc_calloc(1, sizeof(*entry));
2820 server->stat.conn_failures++;
2821 silc_server_disconnect_remote(server, packet_stream,
2822 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2823 silc_server_free_sock_user_data(server, packet_stream, NULL);
2826 entry->hostname = hostname;
2829 entry->server = server;
2830 entry->data.conn_type = SILC_CONN_UNKNOWN;
2831 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2832 silc_packet_set_context(packet_stream, entry);
2834 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2836 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2837 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2838 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2840 /* Take flags for key exchange. Since we do not know what type of connection
2841 this is, we go through all found configurations and use the global ones
2842 as well. This will result always into strictest key exchange flags. */
2843 memset(¶ms, 0, sizeof(params));
2844 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2845 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2846 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2847 if (server->config->param.key_exchange_pfs)
2848 params.flags |= SILC_SKE_SP_FLAG_PFS;
2850 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2851 server->stat.conn_attempts++;
2853 /* Start SILC Key Exchange protocol */
2854 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2855 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2856 server->public_key, server->private_key,
2859 server->stat.conn_failures++;
2860 silc_server_disconnect_remote(server, packet_stream,
2861 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2862 silc_server_free_sock_user_data(server, packet_stream, NULL);
2865 silc_ske_set_callbacks(ske, silc_server_verify_key,
2866 silc_server_accept_completed, packet_stream);
2868 /* Start key exchange protocol */
2869 params.version = silc_version_string;
2870 params.timeout_secs = server->config->key_exchange_timeout;
2871 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2875 /********************************** Rekey ***********************************/
2877 /* Initiator rekey completion callback */
2879 static void silc_server_rekey_completion(SilcSKE ske,
2880 SilcSKEStatus status,
2881 const SilcSKESecurityProperties prop,
2882 const SilcSKEKeyMaterial keymat,
2883 SilcSKERekeyMaterial rekey,
2886 SilcPacketStream sock = context;
2887 SilcIDListData idata = silc_packet_get_context(sock);
2888 SilcServer server = idata->sconn->server;
2890 idata->sconn->op = NULL;
2891 if (status != SILC_SKE_STATUS_OK) {
2892 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2893 idata->sconn->remote_host));
2897 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2898 idata->sconn->remote_host, idata->sconn->remote_port,
2899 SILC_CONNTYPE_STRING(idata->conn_type)));
2901 /* Save rekey data for next rekey */
2902 idata->rekey = rekey;
2904 /* Register new rekey timeout */
2905 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2906 sock, idata->sconn->rekey_timeout, 0);
2909 /* Rekey callback. Start rekey as initiator */
2911 SILC_TASK_CALLBACK(silc_server_do_rekey)
2913 SilcServer server = app_context;
2914 SilcPacketStream sock = context;
2915 SilcIDListData idata = silc_packet_get_context(sock);
2918 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2920 /* Do not execute rekey with disabled connections */
2921 if (idata->status & SILC_IDLIST_STATUS_DISABLED || !idata->rekey)
2924 /* If another protocol is active do not start rekey */
2925 if (idata->sconn->op) {
2926 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2927 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2932 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2933 idata->sconn->remote_host, idata->sconn->remote_port,
2934 SILC_CONNTYPE_STRING(idata->conn_type)));
2937 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2938 server->public_key, NULL, sock);
2942 /* Set SKE callbacks */
2943 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2946 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2949 /* Responder rekey completion callback */
2952 silc_server_rekey_resp_completion(SilcSKE ske,
2953 SilcSKEStatus status,
2954 const SilcSKESecurityProperties prop,
2955 const SilcSKEKeyMaterial keymat,
2956 SilcSKERekeyMaterial rekey,
2959 SilcPacketStream sock = context;
2960 SilcIDListData idata = silc_packet_get_context(sock);
2962 idata->sconn->op = NULL;
2963 if (status != SILC_SKE_STATUS_OK) {
2964 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2965 idata->sconn->remote_host));
2969 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2970 idata->sconn->remote_host, idata->sconn->remote_port,
2971 SILC_CONNTYPE_STRING(idata->conn_type)));
2973 /* Save rekey data for next rekey */
2974 idata->rekey = rekey;
2977 /* Start rekey as responder */
2979 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2982 SilcIDListData idata = silc_packet_get_context(sock);
2985 if (!idata->rekey) {
2986 silc_packet_free(packet);
2990 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2991 idata->sconn->remote_host, idata->sconn->remote_port,
2992 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2995 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2996 server->public_key, NULL, sock);
2998 silc_packet_free(packet);
3002 /* Set SKE callbacks */
3003 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
3006 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
3011 /****************************** Disconnection *******************************/
3013 /* Destroys packet stream. */
3015 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3017 silc_packet_stream_unref(context);
3020 /* Closes connection to socket connection */
3022 void silc_server_close_connection(SilcServer server,
3023 SilcPacketStream sock)
3025 SilcIDListData idata = silc_packet_get_context(sock);
3027 const char *hostname;
3030 if (!silc_packet_stream_is_valid(sock))
3033 memset(tmp, 0, sizeof(tmp));
3034 // silc_socket_get_error(sock, tmp, sizeof(tmp));
3035 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3036 NULL, &hostname, NULL, &port);
3037 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
3038 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
3039 tmp[0] ? tmp : ""));
3041 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
3043 if (idata && idata->sconn) {
3044 silc_server_connection_free(idata->sconn);
3045 idata->sconn = NULL;
3048 /* Take a reference and then destroy the stream. The last reference
3049 is released later in a timeout callback. */
3050 silc_packet_stream_ref(sock);
3051 silc_packet_stream_destroy(sock);
3053 /* Close connection with timeout */
3054 server->stat.conn_num--;
3055 silc_schedule_task_del_by_all(server->schedule, 0,
3056 silc_server_close_connection_final, sock);
3057 silc_schedule_task_add_timeout(server->schedule,
3058 silc_server_close_connection_final,
3062 /* Sends disconnect message to remote connection and disconnects the
3065 void silc_server_disconnect_remote(SilcServer server,
3066 SilcPacketStream sock,
3067 SilcStatus status, ...)
3069 unsigned char buf[512];
3076 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
3078 va_start(ap, status);
3079 cp = va_arg(ap, char *);
3081 silc_vsnprintf(buf, sizeof(buf), cp, ap);
3084 /* Send SILC_PACKET_DISCONNECT */
3085 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
3086 SILC_STR_UI_CHAR(status),
3087 SILC_STR_UI8_STRING(cp ? buf : NULL),
3090 /* Close connection */
3091 silc_server_close_connection(server, sock);
3094 /* Frees client data and notifies about client's signoff. */
3096 void silc_server_free_client_data(SilcServer server,
3097 SilcPacketStream sock,
3098 SilcClientEntry client,
3100 const char *signoff)
3102 SILC_LOG_DEBUG(("Freeing client %p data", client));
3105 /* Check if anyone is watching this nickname */
3106 if (server->server_type == SILC_ROUTER)
3107 silc_server_check_watcher_list(server, client, NULL,
3108 SILC_NOTIFY_TYPE_SIGNOFF);
3110 /* Send SIGNOFF notify to routers. */
3112 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3113 SILC_BROADCAST(server), client->id,
3117 /* Remove client from all channels */
3119 silc_server_remove_from_channels(server, NULL, client,
3120 TRUE, (char *)signoff, TRUE, FALSE);
3122 silc_server_remove_from_channels(server, NULL, client,
3123 FALSE, NULL, FALSE, FALSE);
3125 /* Remove this client from watcher list if it is */
3126 silc_server_del_from_watcher_list(server, client);
3128 /* Remove client's public key from repository, this will free it too. */
3129 if (client->data.public_key) {
3130 silc_skr_del_public_key(server->repository, client->data.public_key,
3132 client->data.public_key = NULL;
3135 /* Update statistics */
3136 server->stat.my_clients--;
3137 assert(server->stat.clients > 0);
3138 server->stat.clients--;
3139 if (server->stat.cell_clients)
3140 server->stat.cell_clients--;
3141 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3142 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3143 silc_schedule_task_del_by_context(server->schedule, client);
3145 if (client->data.sconn) {
3146 silc_server_connection_free(client->data.sconn);
3147 client->data.sconn = NULL;
3150 /* We will not delete the client entry right away. We will take it
3151 into history (for WHOWAS command) for 5 minutes, unless we're
3152 shutting down server. */
3153 if (!server->server_shutdown) {
3154 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3156 client->router = NULL;
3157 client->connection = NULL;
3158 client->data.created = silc_time();
3159 silc_dlist_del(server->expired_clients, client);
3160 silc_dlist_add(server->expired_clients, client);
3162 /* Delete directly since we're shutting down server */
3163 SILC_LOG_DEBUG(("Delete client directly"));
3164 silc_idlist_del_data(client);
3165 silc_idlist_del_client(server->local_list, client);
3169 /* Frees user_data pointer from socket connection object. This also sends
3170 appropriate notify packets to the network to inform about leaving
3173 void silc_server_free_sock_user_data(SilcServer server,
3174 SilcPacketStream sock,
3175 const char *signoff_message)
3177 SilcIDListData idata;
3184 SILC_LOG_DEBUG(("Start, sock %p", sock));
3186 idata = silc_packet_get_context(sock);
3190 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3193 /* Cancel active protocols */
3195 if (idata->sconn && idata->sconn->op) {
3196 SILC_LOG_DEBUG(("Abort active protocol"));
3197 silc_async_abort(idata->sconn->op, NULL, NULL);
3199 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3200 ((SilcUnknownEntry)idata)->op) {
3201 SILC_LOG_DEBUG(("Abort active protocol"));
3202 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3206 switch (idata->conn_type) {
3207 case SILC_CONN_CLIENT:
3209 SilcClientEntry client_entry = (SilcClientEntry)idata;
3210 silc_server_free_client_data(server, sock, client_entry, TRUE,
3212 silc_packet_set_context(sock, NULL);
3216 case SILC_CONN_SERVER:
3217 case SILC_CONN_ROUTER:
3219 SilcServerEntry user_data = (SilcServerEntry)idata;
3220 SilcServerEntry backup_router = NULL;
3222 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3225 backup_router = silc_server_backup_get(server, user_data->id);
3227 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3228 backup_router == server->id_entry &&
3229 idata->conn_type != SILC_CONN_ROUTER)
3230 backup_router = NULL;
3232 if (server->server_shutdown || server->backup_noswitch)
3233 backup_router = NULL;
3235 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3236 NULL, NULL, &ip, &port);
3238 /* If this was our primary router connection then we're lost to
3239 the outside world. */
3240 if (server->router == user_data) {
3241 /* Check whether we have a backup router connection */
3242 if (!backup_router || backup_router == user_data) {
3243 if (!server->no_reconnect)
3244 silc_server_create_connections(server);
3245 server->id_entry->router = NULL;
3246 server->router = NULL;
3247 server->standalone = TRUE;
3248 server->backup_primary = FALSE;
3249 backup_router = NULL;
3251 if (server->id_entry != backup_router) {
3252 SILC_LOG_INFO(("New primary router is backup router %s",
3253 backup_router->server_name));
3254 server->id_entry->router = backup_router;
3255 server->router = backup_router;
3256 server->router_connect = time(0);
3257 server->backup_primary = TRUE;
3258 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3260 /* Send START_USE to backup router to indicate we have switched */
3261 silc_server_backup_send_start_use(server,
3262 backup_router->connection,
3265 SILC_LOG_INFO(("We are now new primary router in this cell"));
3266 server->id_entry->router = NULL;
3267 server->router = NULL;
3268 server->standalone = TRUE;
3271 /* We stop here to take a breath */
3274 if (server->backup_router) {
3275 server->server_type = SILC_ROUTER;
3277 /* We'll need to constantly try to reconnect to the primary
3278 router so that we'll see when it comes back online. */
3279 silc_server_create_connection(server, TRUE, FALSE, ip, port,
3280 silc_server_backup_connected,
3284 /* Mark this connection as replaced */
3285 silc_server_backup_replaced_add(server, user_data->id,
3288 } else if (backup_router) {
3289 SILC_LOG_INFO(("Enabling the use of backup router %s",
3290 backup_router->server_name));
3292 /* Mark this connection as replaced */
3293 silc_server_backup_replaced_add(server, user_data->id,
3295 } else if (server->server_type == SILC_SERVER &&
3296 idata->conn_type == SILC_CONN_ROUTER) {
3297 /* Reconnect to the router (backup) */
3298 if (!server->no_reconnect)
3299 silc_server_create_connections(server);
3302 if (user_data->server_name)
3303 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3304 ("Server %s signoff", user_data->server_name));
3306 if (!backup_router) {
3307 /* Remove all servers that are originated from this server, and
3308 remove the clients of those servers too. */
3309 silc_server_remove_servers_by_server(server, user_data, TRUE);
3312 /* Remove the clients that this server owns as they will become
3313 invalid now too. For backup router the server is actually
3314 coming from the primary router, so mark that as the owner
3316 if (server->server_type == SILC_BACKUP_ROUTER &&
3317 sock->type == SILC_CONN_SERVER)
3318 silc_server_remove_clients_by_server(server, server->router,
3322 silc_server_remove_clients_by_server(server, user_data,
3325 /* Remove channels owned by this server */
3326 if (server->server_type == SILC_SERVER)
3327 silc_server_remove_channels_by_server(server, user_data);
3329 /* Enable local server connections that may be disabled */
3330 silc_server_local_servers_toggle_enabled(server, TRUE);
3332 /* Update the client entries of this server to the new backup
3333 router. If we are the backup router we also resolve the real
3334 servers for the clients. After updating is over this also
3335 removes the clients that this server explicitly owns. */
3336 silc_server_update_clients_by_server(server, user_data,
3337 backup_router, TRUE);
3339 /* If we are router and just lost our primary router (now standlaone)
3340 we remove everything that was behind it, since we don't know
3342 if (server->server_type == SILC_ROUTER && server->standalone)
3343 /* Remove all servers that are originated from this server, and
3344 remove the clients of those servers too. */
3345 silc_server_remove_servers_by_server(server, user_data, TRUE);
3347 /* Finally remove the clients that are explicitly owned by this
3348 server. They go down with the server. */
3349 silc_server_remove_clients_by_server(server, user_data,
3352 /* Update our server cache to use the new backup router too. */
3353 silc_server_update_servers_by_server(server, user_data, backup_router);
3354 if (server->server_type == SILC_SERVER)
3355 silc_server_update_channels_by_server(server, user_data,
3358 /* Send notify about primary router going down to local operators */
3359 if (server->backup_router)
3360 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3361 SILC_NOTIFY_TYPE_NONE,
3362 ("%s switched to backup router %s "
3363 "(we are primary router now)",
3364 server->server_name, server->server_name));
3365 else if (server->router)
3366 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3367 SILC_NOTIFY_TYPE_NONE,
3368 ("%s switched to backup router %s",
3369 server->server_name,
3370 server->router->server_name));
3372 server->backup_noswitch = FALSE;
3375 silc_server_connection_free(idata->sconn);
3376 idata->sconn = NULL;
3380 if (idata->conn_type == SILC_CONN_SERVER) {
3381 server->stat.my_servers--;
3382 server->stat.servers--;
3383 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3384 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3385 server->stat.my_routers--;
3386 server->stat.routers--;
3387 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3389 if (server->server_type == SILC_ROUTER)
3390 server->stat.cell_servers--;
3392 /* Free the server entry */
3393 silc_server_backup_del(server, user_data);
3394 silc_server_backup_replaced_del(server, user_data);
3395 silc_idlist_del_data(user_data);
3396 if (!silc_idlist_del_server(server->local_list, user_data))
3397 silc_idlist_del_server(server->global_list, user_data);
3399 if (backup_router && backup_router != server->id_entry) {
3400 /* Announce all of our stuff that was created about 5 minutes ago.
3401 The backup router knows all the other stuff already. */
3402 if (server->server_type == SILC_ROUTER)
3403 silc_server_announce_servers(server, FALSE, time(0) - 300,
3404 backup_router->connection);
3406 /* Announce our clients and channels to the router */
3407 silc_server_announce_clients(server, time(0) - 300,
3408 backup_router->connection);
3409 silc_server_announce_channels(server, time(0) - 300,
3410 backup_router->connection);
3413 silc_packet_set_context(sock, NULL);
3419 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3421 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3424 if (server->router_conn == idata->sconn) {
3425 if (!server->no_reconnect)
3426 silc_server_create_connections(server);
3427 server->router_conn = NULL;
3430 silc_server_connection_free(idata->sconn);
3431 idata->sconn = NULL;
3433 silc_idlist_del_data(idata);
3435 silc_packet_set_context(sock, NULL);
3441 /* Removes client from all channels it has joined. This is used when client
3442 connection is disconnected. If the client on a channel is last, the
3443 channel is removed as well. This sends the SIGNOFF notify types. */
3445 void silc_server_remove_from_channels(SilcServer server,
3446 SilcPacketStream sock,
3447 SilcClientEntry client,
3449 const char *signoff_message,
3453 SilcChannelEntry channel;
3454 SilcChannelClientEntry chl;
3455 SilcHashTableList htl;
3456 SilcBuffer clidp = NULL;
3461 if (notify && !client->id)
3464 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3465 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3468 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3473 /* Remove the client from all channels. The client is removed from
3474 the channels' user list. */
3475 silc_hash_table_list(client->channels, &htl);
3476 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3477 channel = chl->channel;
3479 /* Remove channel if this is last client leaving the channel, unless
3480 the channel is permanent. */
3481 if (server->server_type != SILC_SERVER &&
3482 silc_hash_table_count(channel->user_list) < 2) {
3483 silc_server_channel_delete(server, channel);
3487 silc_hash_table_del(client->channels, channel);
3488 silc_hash_table_del(channel->user_list, client);
3489 channel->user_count--;
3491 /* If there is no global users on the channel anymore mark the channel
3492 as local channel. Do not check if the removed client is local client. */
3493 if (server->server_type == SILC_SERVER && channel->global_users &&
3494 chl->client->router && !silc_server_channel_has_global(channel))
3495 channel->global_users = FALSE;
3497 memset(chl, 'A', sizeof(*chl));
3500 /* Update statistics */
3501 if (SILC_IS_LOCAL(client))
3502 server->stat.my_chanclients--;
3503 if (server->server_type == SILC_ROUTER) {
3504 server->stat.cell_chanclients--;
3505 server->stat.chanclients--;
3508 /* If there is not at least one local user on the channel then we don't
3509 need the channel entry anymore, we can remove it safely, unless the
3510 channel is permanent channel */
3511 if (server->server_type == SILC_SERVER &&
3512 !silc_server_channel_has_local(channel)) {
3513 /* Notify about leaving client if this channel has global users. */
3514 if (notify && channel->global_users)
3515 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3516 SILC_NOTIFY_TYPE_SIGNOFF,
3517 signoff_message ? 2 : 1,
3518 clidp->data, silc_buffer_len(clidp),
3519 signoff_message, signoff_message ?
3520 strlen(signoff_message) : 0);
3522 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3523 silc_server_channel_delete(server, channel);
3527 /* Send notify to channel about client leaving SILC and channel too */
3529 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3530 SILC_NOTIFY_TYPE_SIGNOFF,
3531 signoff_message ? 2 : 1,
3532 clidp->data, silc_buffer_len(clidp),
3533 signoff_message, signoff_message ?
3534 strlen(signoff_message) : 0);
3536 if (killed && clidp) {
3537 /* Remove the client from channel's invite list */
3538 if (channel->invite_list &&
3539 silc_hash_table_count(channel->invite_list)) {
3541 SilcArgumentPayload iargs;
3542 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3543 silc_buffer_len(clidp), 3);
3544 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3545 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3546 silc_buffer_free(ab);
3547 silc_argument_payload_free(iargs);
3551 /* Don't create keys if we are shutting down */
3552 if (server->server_shutdown)
3555 /* Re-generate channel key if needed */
3556 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3557 if (!silc_server_create_channel_key(server, channel, 0))
3560 /* Send the channel key to the channel. The key of course is not sent
3561 to the client who was removed from the channel. */
3562 silc_server_send_channel_key(server, client->connection, channel,
3563 server->server_type == SILC_ROUTER ?
3564 FALSE : !server->standalone);
3568 silc_hash_table_list_reset(&htl);
3570 silc_buffer_free(clidp);
3573 /* Removes client from one channel. This is used for example when client
3574 calls LEAVE command to remove itself from the channel. Returns TRUE
3575 if channel still exists and FALSE if the channel is removed when
3576 last client leaves the channel. If `notify' is FALSE notify messages
3579 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3580 SilcPacketStream sock,
3581 SilcChannelEntry channel,
3582 SilcClientEntry client,
3585 SilcChannelClientEntry chl;
3588 SILC_LOG_DEBUG(("Removing %s from channel %s",
3589 silc_id_render(client->id, SILC_ID_CLIENT),
3590 channel->channel_name));
3592 /* Get the entry to the channel, if this client is not on the channel
3594 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3597 /* Remove channel if this is last client leaving the channel, unless
3598 the channel is permanent. */
3599 if (server->server_type != SILC_SERVER &&
3600 silc_hash_table_count(channel->user_list) < 2) {
3601 silc_server_channel_delete(server, channel);
3605 silc_hash_table_del(client->channels, channel);
3606 silc_hash_table_del(channel->user_list, client);
3607 channel->user_count--;
3609 /* If there is no global users on the channel anymore mark the channel
3610 as local channel. Do not check if the client is local client. */
3611 if (server->server_type == SILC_SERVER && channel->global_users &&
3612 chl->client->router && !silc_server_channel_has_global(channel))
3613 channel->global_users = FALSE;
3615 memset(chl, 'O', sizeof(*chl));
3618 /* Update statistics */
3619 if (SILC_IS_LOCAL(client))
3620 server->stat.my_chanclients--;
3621 if (server->server_type == SILC_ROUTER) {
3622 server->stat.cell_chanclients--;
3623 server->stat.chanclients--;
3626 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3630 /* If there is not at least one local user on the channel then we don't
3631 need the channel entry anymore, we can remove it safely, unless the
3632 channel is permanent channel */
3633 if (server->server_type == SILC_SERVER &&
3634 !silc_server_channel_has_local(channel)) {
3635 /* Notify about leaving client if this channel has global users. */
3636 if (notify && channel->global_users)
3637 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3638 SILC_NOTIFY_TYPE_LEAVE, 1,
3639 clidp->data, silc_buffer_len(clidp));
3641 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3642 silc_server_channel_delete(server, channel);
3643 silc_buffer_free(clidp);
3647 /* Send notify to channel about client leaving the channel */
3649 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3650 SILC_NOTIFY_TYPE_LEAVE, 1,
3651 clidp->data, silc_buffer_len(clidp));
3653 silc_buffer_free(clidp);
3657 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3658 function may be used only by router. In real SILC network all channels
3659 are created by routers thus this function is never used by normal
3662 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3663 SilcServerID *router_id,
3669 SilcChannelID *channel_id;
3670 SilcChannelEntry entry;
3671 SilcCipher send_key, receive_key;
3674 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3677 cipher = SILC_DEFAULT_CIPHER;
3679 hmac = SILC_DEFAULT_HMAC;
3681 /* Allocate cipher */
3682 if (!silc_cipher_alloc(cipher, &send_key))
3684 if (!silc_cipher_alloc(cipher, &receive_key)) {
3685 silc_cipher_free(send_key);
3690 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3691 silc_cipher_free(send_key);
3692 silc_cipher_free(receive_key);
3696 channel_name = strdup(channel_name);
3698 /* Create the channel ID */
3699 if (!silc_id_create_channel_id(server, router_id, server->rng,
3701 silc_free(channel_name);
3702 silc_cipher_free(send_key);
3703 silc_cipher_free(receive_key);
3704 silc_hmac_free(newhmac);
3708 /* Create the channel */
3709 entry = silc_idlist_add_channel(server->local_list, channel_name,
3710 SILC_CHANNEL_MODE_NONE, channel_id,
3711 NULL, send_key, receive_key, newhmac);
3713 silc_free(channel_name);
3714 silc_cipher_free(send_key);
3715 silc_cipher_free(receive_key);
3716 silc_hmac_free(newhmac);
3717 silc_free(channel_id);
3721 entry->cipher = strdup(cipher);
3722 entry->hmac_name = strdup(hmac);
3724 /* Now create the actual key material */
3725 if (!silc_server_create_channel_key(server, entry,
3726 silc_cipher_get_key_len(send_key) / 8)) {
3727 silc_idlist_del_channel(server->local_list, entry);
3731 /* Notify other routers about the new channel. We send the packet
3732 to our primary route. */
3734 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3735 channel_name, entry->id,
3736 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3739 /* Distribute to backup routers */
3740 if (broadcast && server->server_type == SILC_ROUTER) {
3742 unsigned char cid[32];
3743 SilcUInt32 name_len = strlen(channel_name);
3746 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3747 packet = silc_channel_payload_encode(channel_name, name_len,
3748 cid, id_len, entry->mode);
3749 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3750 packet->data, silc_buffer_len(packet), FALSE,
3752 silc_buffer_free(packet);
3755 server->stat.my_channels++;
3756 if (server->server_type == SILC_ROUTER) {
3757 server->stat.channels++;
3758 server->stat.cell_channels++;
3759 entry->users_resolved = TRUE;
3765 /* Same as above but creates the channel with Channel ID `channel_id. */
3768 silc_server_create_new_channel_with_id(SilcServer server,
3772 SilcChannelID *channel_id,
3775 SilcChannelEntry entry;
3776 SilcCipher send_key, receive_key;
3779 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3782 cipher = SILC_DEFAULT_CIPHER;
3784 hmac = SILC_DEFAULT_HMAC;
3786 /* Allocate cipher */
3787 if (!silc_cipher_alloc(cipher, &send_key))
3789 if (!silc_cipher_alloc(cipher, &receive_key)) {
3790 silc_cipher_free(send_key);
3795 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3796 silc_cipher_free(send_key);
3797 silc_cipher_free(receive_key);
3801 channel_name = strdup(channel_name);
3803 /* Create the channel */
3804 entry = silc_idlist_add_channel(server->local_list, channel_name,
3805 SILC_CHANNEL_MODE_NONE, channel_id,
3806 NULL, send_key, receive_key, newhmac);
3808 silc_cipher_free(send_key);
3809 silc_cipher_free(receive_key);
3810 silc_hmac_free(newhmac);
3811 silc_free(channel_name);
3815 /* Now create the actual key material */
3816 if (!silc_server_create_channel_key(server, entry,
3817 silc_cipher_get_key_len(send_key) / 8)) {
3818 silc_idlist_del_channel(server->local_list, entry);
3822 /* Notify other routers about the new channel. We send the packet
3823 to our primary route. */
3825 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3826 channel_name, entry->id,
3827 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3830 /* Distribute to backup routers */
3831 if (broadcast && server->server_type == SILC_ROUTER) {
3833 unsigned char cid[32];
3834 SilcUInt32 name_len = strlen(channel_name);
3837 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3838 packet = silc_channel_payload_encode(channel_name, name_len,
3839 cid, id_len, entry->mode);
3840 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3841 packet->data, silc_buffer_len(packet), FALSE,
3843 silc_buffer_free(packet);
3846 server->stat.my_channels++;
3847 if (server->server_type == SILC_ROUTER) {
3848 server->stat.channels++;
3849 server->stat.cell_channels++;
3850 entry->users_resolved = TRUE;
3856 /* Channel's key re-key timeout callback. */
3858 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3860 SilcServer server = app_context;
3861 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3865 /* Return now if we are shutting down */
3866 if (server->server_shutdown)
3869 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3872 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3875 /* Generates new channel key. This is used to create the initial channel key
3876 but also to re-generate new key for channel. If `key_len' is provided
3877 it is the bytes of the key length. */
3879 SilcBool silc_server_create_channel_key(SilcServer server,
3880 SilcChannelEntry channel,
3884 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3887 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3888 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3892 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3894 if (!channel->send_key)
3895 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3896 channel->send_key = NULL;
3899 if (!channel->receive_key)
3900 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3901 silc_cipher_free(channel->send_key);
3902 channel->send_key = channel->receive_key = NULL;
3908 else if (channel->key_len)
3909 len = channel->key_len / 8;
3911 len = silc_cipher_get_key_len(channel->send_key) / 8;
3913 /* Create channel key */
3914 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3917 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3918 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3920 /* Remove old key if exists */
3922 memset(channel->key, 0, channel->key_len / 8);
3923 silc_free(channel->key);
3927 channel->key_len = len * 8;
3928 channel->key = silc_memdup(channel_key, len);
3929 memset(channel_key, 0, sizeof(channel_key));
3931 /* Generate HMAC key from the channel key data and set it */
3933 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3934 memset(channel->key, 0, channel->key_len / 8);
3935 silc_free(channel->key);
3936 silc_cipher_free(channel->send_key);
3937 silc_cipher_free(channel->receive_key);
3938 channel->send_key = channel->receive_key = NULL;
3941 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3942 silc_hmac_set_key(channel->hmac, hash,
3943 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3944 memset(hash, 0, sizeof(hash));
3946 if (server->server_type == SILC_ROUTER) {
3947 if (!channel->rekey)
3948 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3949 channel->rekey->channel = channel;
3950 channel->rekey->key_len = key_len;
3951 if (channel->rekey->task)
3952 silc_schedule_task_del(server->schedule, channel->rekey->task);
3954 channel->rekey->task =
3955 silc_schedule_task_add_timeout(server->schedule,
3956 silc_server_channel_key_rekey,
3957 (void *)channel->rekey,
3958 server->config->channel_rekey_secs, 0);
3964 /* Saves the channel key found in the encoded `key_payload' buffer. This
3965 function is used when we receive Channel Key Payload and also when we're
3966 processing JOIN command reply. Returns entry to the channel. */
3968 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3969 SilcBuffer key_payload,
3970 SilcChannelEntry channel)
3972 SilcChannelKeyPayload payload = NULL;
3974 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3978 /* Decode channel key payload */
3979 payload = silc_channel_key_payload_parse(key_payload->data,
3980 silc_buffer_len(key_payload));
3982 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3987 /* Get the channel entry */
3990 /* Get channel ID */
3991 tmp = silc_channel_key_get_id(payload, &tmp_len);
3992 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3997 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3999 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
4001 if (server->server_type == SILC_ROUTER)
4002 SILC_LOG_ERROR(("Received key for non-existent channel %s",
4003 silc_id_render(&id, SILC_ID_CHANNEL)));
4009 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4011 tmp = silc_channel_key_get_key(payload, &tmp_len);
4017 cipher = silc_channel_key_get_cipher(payload, NULL);
4023 /* Remove old key if exists */
4025 memset(channel->key, 0, channel->key_len / 8);
4026 silc_free(channel->key);
4027 silc_cipher_free(channel->send_key);
4028 silc_cipher_free(channel->receive_key);
4031 /* Create new cipher */
4032 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
4033 channel->send_key = NULL;
4037 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
4038 silc_cipher_free(channel->send_key);
4039 channel->send_key = channel->receive_key = NULL;
4044 if (channel->cipher)
4045 silc_free(channel->cipher);
4046 channel->cipher = strdup(cipher);
4049 channel->key_len = tmp_len * 8;
4050 channel->key = silc_memdup(tmp, tmp_len);
4051 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
4052 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
4054 /* Generate HMAC key from the channel key data and set it */
4056 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4057 memset(channel->key, 0, channel->key_len / 8);
4058 silc_free(channel->key);
4059 silc_cipher_free(channel->send_key);
4060 silc_cipher_free(channel->receive_key);
4061 channel->send_key = channel->receive_key = NULL;
4064 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4065 silc_hmac_set_key(channel->hmac, hash,
4066 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4068 memset(hash, 0, sizeof(hash));
4069 memset(tmp, 0, tmp_len);
4071 if (server->server_type == SILC_ROUTER) {
4072 if (!channel->rekey)
4073 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4074 channel->rekey->channel = channel;
4075 if (channel->rekey->task)
4076 silc_schedule_task_del(server->schedule, channel->rekey->task);
4078 channel->rekey->task =
4079 silc_schedule_task_add_timeout(server->schedule,
4080 silc_server_channel_key_rekey,
4081 (void *)channel->rekey,
4082 server->config->channel_rekey_secs, 0);
4087 silc_channel_key_payload_free(payload);
4092 /* Returns assembled of all servers in the given ID list. The packet's
4093 form is dictated by the New ID payload. */
4095 static void silc_server_announce_get_servers(SilcServer server,
4096 SilcServerEntry remote,
4098 SilcBuffer *servers,
4099 unsigned long creation_time)
4102 SilcIDCacheEntry id_cache;
4103 SilcServerEntry entry;
4107 /* Go through all clients in the list */
4108 if (silc_idcache_get_all(id_list->servers, &list)) {
4109 silc_list_start(list);
4110 while ((id_cache = silc_list_get(list))) {
4111 entry = (SilcServerEntry)id_cache->context;
4113 /* Do not announce the one we've sending our announcements and
4114 do not announce ourself. Also check the creation time if it's
4116 if ((entry == remote) || (entry == server->id_entry) ||
4117 (creation_time && entry->data.created < creation_time))
4120 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4122 tmp = silc_buffer_realloc(*servers,
4124 silc_buffer_truelen((*servers)) +
4125 silc_buffer_len(idp) :
4126 silc_buffer_len(idp)));
4130 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4131 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4132 silc_buffer_pull(*servers, silc_buffer_len(idp));
4133 silc_buffer_free(idp);
4139 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4145 p = silc_notify_payload_encode(notify, argc, ap);
4151 /* This function is used by router to announce existing servers to our
4152 primary router when we've connected to it. If `creation_time' is non-zero
4153 then only the servers that has been created after the `creation_time'
4154 will be announced. */
4156 void silc_server_announce_servers(SilcServer server, SilcBool global,
4157 unsigned long creation_time,
4158 SilcPacketStream remote)
4160 SilcBuffer servers = NULL;
4162 SILC_LOG_DEBUG(("Announcing servers"));
4164 /* Get servers in local list */
4165 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4166 server->local_list, &servers,
4170 /* Get servers in global list */
4171 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4172 server->global_list, &servers,
4176 silc_buffer_push(servers, servers->data - servers->head);
4177 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4179 /* Send the packet */
4180 silc_server_packet_send(server, remote,
4181 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4182 servers->data, silc_buffer_len(servers));
4184 silc_buffer_free(servers);
4188 /* Returns assembled packet of all clients in the given ID list. The
4189 packet's form is dictated by the New ID Payload. */
4191 static void silc_server_announce_get_clients(SilcServer server,
4193 SilcBuffer *clients,
4195 unsigned long creation_time)
4198 SilcIDCacheEntry id_cache;
4199 SilcClientEntry client;
4202 unsigned char mode[4];
4205 /* Go through all clients in the list */
4206 if (silc_idcache_get_all(id_list->clients, &list)) {
4207 silc_list_start(list);
4208 while ((id_cache = silc_list_get(list))) {
4209 client = (SilcClientEntry)id_cache->context;
4211 if (creation_time && client->data.created < creation_time)
4213 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4215 if (!client->connection && !client->router)
4218 SILC_LOG_DEBUG(("Announce Client ID %s",
4219 silc_id_render(client->id, SILC_ID_CLIENT)));
4221 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4225 tmp2 = silc_buffer_realloc(*clients,
4227 silc_buffer_truelen((*clients)) +
4228 silc_buffer_len(idp) :
4229 silc_buffer_len(idp)));
4233 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4234 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4235 silc_buffer_pull(*clients, silc_buffer_len(idp));
4237 SILC_PUT32_MSB(client->mode, mode);
4239 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4240 2, idp->data, silc_buffer_len(idp),
4242 tmp2 = silc_buffer_realloc(*umodes,
4244 silc_buffer_truelen((*umodes)) +
4245 silc_buffer_len(tmp) :
4246 silc_buffer_len(tmp)));
4250 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4251 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4252 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4253 silc_buffer_free(tmp);
4255 silc_buffer_free(idp);
4260 /* This function is used to announce our existing clients to our router
4261 when we've connected to it. If `creation_time' is non-zero then only
4262 the clients that has been created after the `creation_time' will be
4265 void silc_server_announce_clients(SilcServer server,
4266 unsigned long creation_time,
4267 SilcPacketStream remote)
4269 SilcBuffer clients = NULL;
4270 SilcBuffer umodes = NULL;
4272 SILC_LOG_DEBUG(("Announcing clients"));
4274 /* Get clients in local list */
4275 silc_server_announce_get_clients(server, server->local_list,
4276 &clients, &umodes, creation_time);
4278 /* As router we announce our global list as well */
4279 if (server->server_type == SILC_ROUTER)
4280 silc_server_announce_get_clients(server, server->global_list,
4281 &clients, &umodes, creation_time);
4284 silc_buffer_push(clients, clients->data - clients->head);
4285 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4287 /* Send the packet */
4288 silc_server_packet_send(server, remote,
4289 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4290 clients->data, silc_buffer_len(clients));
4292 silc_buffer_free(clients);
4296 silc_buffer_push(umodes, umodes->data - umodes->head);
4297 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4299 /* Send the packet */
4300 silc_server_packet_send(server, remote,
4301 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4302 umodes->data, silc_buffer_len(umodes));
4304 silc_buffer_free(umodes);
4308 /* Returns channel's topic for announcing it */
4310 void silc_server_announce_get_channel_topic(SilcServer server,
4311 SilcChannelEntry channel,
4316 if (channel->topic) {
4317 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4318 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4320 silc_buffer_len(chidp),
4322 strlen(channel->topic));
4323 silc_buffer_free(chidp);
4327 /* Returns channel's invite and ban lists */
4329 void silc_server_announce_get_inviteban(SilcServer server,
4330 SilcChannelEntry channel,
4334 SilcBuffer list, idp, idp2, tmp2;
4337 SilcHashTableList htl;
4338 const unsigned char a[1] = { 0x03 };
4340 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4342 /* Encode invite list */
4343 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4344 list = silc_buffer_alloc_size(2);
4345 type = silc_hash_table_count(channel->invite_list);
4346 SILC_PUT16_MSB(type, list->data);
4347 silc_hash_table_list(channel->invite_list, &htl);
4348 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4349 list = silc_argument_payload_encode_one(list, tmp2->data,
4350 silc_buffer_len(tmp2),
4351 SILC_PTR_TO_32(ptype));
4352 silc_hash_table_list_reset(&htl);
4354 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4356 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4357 idp->data, silc_buffer_len(idp),
4358 channel->channel_name,
4359 strlen(channel->channel_name),
4360 idp2->data, silc_buffer_len(idp2),
4362 list->data, silc_buffer_len(list));
4363 silc_buffer_free(idp2);
4364 silc_buffer_free(list);
4367 /* Encode ban list */
4368 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4369 list = silc_buffer_alloc_size(2);
4370 type = silc_hash_table_count(channel->ban_list);
4371 SILC_PUT16_MSB(type, list->data);
4372 silc_hash_table_list(channel->ban_list, &htl);
4373 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4374 list = silc_argument_payload_encode_one(list, tmp2->data,
4375 silc_buffer_len(tmp2),
4376 SILC_PTR_TO_32(ptype));
4377 silc_hash_table_list_reset(&htl);
4380 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4381 idp->data, silc_buffer_len(idp),
4383 list->data, silc_buffer_len(list));
4384 silc_buffer_free(list);
4387 silc_buffer_free(idp);
4390 /* Returns assembled packets for channel users of the `channel'. */
4392 void silc_server_announce_get_channel_users(SilcServer server,
4393 SilcChannelEntry channel,
4394 SilcBuffer *channel_modes,
4395 SilcBuffer *channel_users,
4396 SilcBuffer *channel_users_modes)
4398 SilcChannelClientEntry chl;
4399 SilcHashTableList htl;
4400 SilcBuffer chidp, clidp, csidp;
4401 SilcBuffer tmp, fkey = NULL, chpklist;
4403 unsigned char mode[4], ulimit[4];
4407 SILC_LOG_DEBUG(("Start"));
4409 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4410 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4411 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4414 SILC_PUT32_MSB(channel->mode, mode);
4415 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4416 SILC_PUT32_MSB(channel->user_limit, ulimit);
4417 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4418 if (channel->founder_key)
4419 fkey = silc_public_key_payload_encode(channel->founder_key);
4421 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4423 silc_buffer_len(csidp),
4426 hmac, hmac ? strlen(hmac) : 0,
4427 channel->passphrase,
4428 channel->passphrase ?
4429 strlen(channel->passphrase) : 0,
4430 fkey ? fkey->data : NULL,
4431 fkey ? silc_buffer_len(fkey) : 0,
4432 chpklist ? chpklist->data : NULL,
4434 silc_buffer_len(chpklist) : 0,
4436 SILC_CHANNEL_MODE_ULIMIT ?
4439 SILC_CHANNEL_MODE_ULIMIT ?
4440 sizeof(ulimit) : 0));
4441 len = silc_buffer_len(tmp);
4443 silc_buffer_realloc(*channel_modes,
4445 silc_buffer_truelen((*channel_modes)) + len : len));
4448 *channel_modes = tmp2;
4449 silc_buffer_pull_tail(*channel_modes,
4450 ((*channel_modes)->end -
4451 (*channel_modes)->data));
4452 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4453 silc_buffer_pull(*channel_modes, len);
4454 silc_buffer_free(tmp);
4455 silc_buffer_free(fkey);
4458 /* Now find all users on the channel */
4459 silc_hash_table_list(channel->user_list, &htl);
4460 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4461 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4463 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4467 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4469 silc_buffer_len(clidp),
4471 silc_buffer_len(chidp));
4472 len = silc_buffer_len(tmp);
4474 silc_buffer_realloc(*channel_users,
4476 silc_buffer_truelen((*channel_users)) + len : len));
4479 *channel_users = tmp2;
4480 silc_buffer_pull_tail(*channel_users,
4481 ((*channel_users)->end -
4482 (*channel_users)->data));
4484 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4485 silc_buffer_pull(*channel_users, len);
4486 silc_buffer_free(tmp);
4488 /* CUMODE notify for mode change on the channel */
4489 SILC_PUT32_MSB(chl->mode, mode);
4490 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4491 fkey = silc_public_key_payload_encode(channel->founder_key);
4492 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4494 silc_buffer_len(csidp),
4497 silc_buffer_len(clidp),
4498 fkey ? fkey->data : NULL,
4499 fkey ? silc_buffer_len(fkey) : 0);
4500 len = silc_buffer_len(tmp);
4502 silc_buffer_realloc(*channel_users_modes,
4503 (*channel_users_modes ?
4504 silc_buffer_truelen((*channel_users_modes)) +
4508 *channel_users_modes = tmp2;
4509 silc_buffer_pull_tail(*channel_users_modes,
4510 ((*channel_users_modes)->end -
4511 (*channel_users_modes)->data));
4513 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4514 silc_buffer_pull(*channel_users_modes, len);
4515 silc_buffer_free(tmp);
4516 silc_buffer_free(fkey);
4518 silc_buffer_free(clidp);
4520 silc_hash_table_list_reset(&htl);
4521 silc_buffer_free(chidp);
4522 silc_buffer_free(csidp);
4525 /* Returns assembled packets for all channels and users on those channels
4526 from the given ID List. The packets are in the form dictated by the
4527 New Channel and New Channel User payloads. */
4529 void silc_server_announce_get_channels(SilcServer server,
4531 SilcBuffer *channels,
4532 SilcBuffer **channel_modes,
4533 SilcBuffer *channel_users,
4534 SilcBuffer **channel_users_modes,
4535 SilcUInt32 *channel_users_modes_c,
4536 SilcBuffer **channel_topics,
4537 SilcBuffer **channel_invites,
4538 SilcBuffer **channel_bans,
4539 SilcChannelID ***channel_ids,
4540 unsigned long creation_time)
4543 SilcIDCacheEntry id_cache;
4544 SilcChannelEntry channel;
4545 unsigned char cid[32];
4547 SilcUInt16 name_len;
4549 int i = *channel_users_modes_c;
4553 SILC_LOG_DEBUG(("Start"));
4555 /* Go through all channels in the list */
4556 if (silc_idcache_get_all(id_list->channels, &list)) {
4557 silc_list_start(list);
4558 while ((id_cache = silc_list_get(list))) {
4559 channel = (SilcChannelEntry)id_cache->context;
4561 if (creation_time && channel->created < creation_time)
4566 SILC_LOG_DEBUG(("Announce Channel ID %s",
4567 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4569 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4570 name_len = strlen(channel->channel_name);
4573 len = 4 + name_len + id_len + 4;
4575 silc_buffer_realloc(*channels,
4577 silc_buffer_truelen((*channels)) +
4583 silc_buffer_pull_tail(*channels,
4584 ((*channels)->end - (*channels)->data));
4585 silc_buffer_format(*channels,
4586 SILC_STR_UI_SHORT(name_len),
4587 SILC_STR_UI_XNSTRING(channel->channel_name,
4589 SILC_STR_UI_SHORT(id_len),
4590 SILC_STR_UI_XNSTRING(cid, id_len),
4591 SILC_STR_UI_INT(channel->mode),
4593 silc_buffer_pull(*channels, len);
4596 if (creation_time && channel->updated < creation_time)
4602 /* Channel user modes */
4603 tmp = silc_realloc(*channel_users_modes,
4604 sizeof(**channel_users_modes) * (i + 1));
4607 *channel_users_modes = tmp;
4608 (*channel_users_modes)[i] = NULL;
4609 tmp = silc_realloc(*channel_modes,
4610 sizeof(**channel_modes) * (i + 1));
4613 *channel_modes = tmp;
4614 (*channel_modes)[i] = NULL;
4615 tmp = silc_realloc(*channel_ids,
4616 sizeof(**channel_ids) * (i + 1));
4620 (*channel_ids)[i] = NULL;
4621 silc_server_announce_get_channel_users(server, channel,
4622 &(*channel_modes)[i],
4624 &(*channel_users_modes)[i]);
4625 (*channel_ids)[i] = channel->id;
4627 /* Channel's topic */
4628 tmp = silc_realloc(*channel_topics,
4629 sizeof(**channel_topics) * (i + 1));
4632 *channel_topics = tmp;
4633 (*channel_topics)[i] = NULL;
4634 silc_server_announce_get_channel_topic(server, channel,
4635 &(*channel_topics)[i]);
4637 /* Channel's invite and ban list */
4638 tmp = silc_realloc(*channel_invites,
4639 sizeof(**channel_invites) * (i + 1));
4642 *channel_invites = tmp;
4643 (*channel_invites)[i] = NULL;
4644 tmp = silc_realloc(*channel_bans,
4645 sizeof(**channel_bans) * (i + 1));
4648 *channel_bans = tmp;
4649 (*channel_bans)[i] = NULL;
4650 silc_server_announce_get_inviteban(server, channel,
4651 &(*channel_invites)[i],
4652 &(*channel_bans)[i]);
4654 (*channel_users_modes_c)++;
4662 /* This function is used to announce our existing channels to our router
4663 when we've connected to it. This also announces the users on the
4664 channels to the router. If the `creation_time' is non-zero only the
4665 channels that was created after the `creation_time' are announced.
4666 Note that the channel users are still announced even if the `creation_time'
4669 void silc_server_announce_channels(SilcServer server,
4670 unsigned long creation_time,
4671 SilcPacketStream remote)
4673 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4674 SilcBuffer *channel_users_modes = NULL;
4675 SilcBuffer *channel_topics = NULL;
4676 SilcBuffer *channel_invites = NULL;
4677 SilcBuffer *channel_bans = NULL;
4678 SilcUInt32 channel_users_modes_c = 0;
4679 SilcChannelID **channel_ids = NULL;
4681 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4683 /* Get channels and channel users in local list */
4684 silc_server_announce_get_channels(server, server->local_list,
4685 &channels, &channel_modes,
4687 &channel_users_modes,
4688 &channel_users_modes_c,
4692 &channel_ids, creation_time);
4694 /* Get channels and channel users in global list */
4695 if (server->server_type != SILC_SERVER)
4696 silc_server_announce_get_channels(server, server->global_list,
4697 &channels, &channel_modes,
4699 &channel_users_modes,
4700 &channel_users_modes_c,
4704 &channel_ids, creation_time);
4707 silc_buffer_push(channels, channels->data - channels->head);
4708 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4710 /* Send the packet */
4711 silc_server_packet_send(server, remote,
4712 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4713 channels->data, silc_buffer_len(channels));
4715 silc_buffer_free(channels);
4718 if (channel_users) {
4719 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4720 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4721 silc_buffer_len(channel_users));
4723 /* Send the packet */
4724 silc_server_packet_send(server, remote,
4725 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4726 channel_users->data, silc_buffer_len(channel_users));
4728 silc_buffer_free(channel_users);
4731 if (channel_modes) {
4734 for (i = 0; i < channel_users_modes_c; i++) {
4735 if (!channel_modes[i])
4737 silc_buffer_push(channel_modes[i],
4738 channel_modes[i]->data -
4739 channel_modes[i]->head);
4740 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4741 silc_buffer_len(channel_modes[i]));
4742 silc_server_packet_send_dest(server, remote,
4743 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4744 channel_ids[i], SILC_ID_CHANNEL,
4745 channel_modes[i]->data,
4746 silc_buffer_len(channel_modes[i]));
4747 silc_buffer_free(channel_modes[i]);
4749 silc_free(channel_modes);
4752 if (channel_users_modes) {
4755 for (i = 0; i < channel_users_modes_c; i++) {
4756 if (!channel_users_modes[i])
4758 silc_buffer_push(channel_users_modes[i],
4759 channel_users_modes[i]->data -
4760 channel_users_modes[i]->head);
4761 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4762 silc_buffer_len(channel_users_modes[i]));
4763 silc_server_packet_send_dest(server, remote,
4764 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4765 channel_ids[i], SILC_ID_CHANNEL,
4766 channel_users_modes[i]->data,
4767 silc_buffer_len(channel_users_modes[i]));
4768 silc_buffer_free(channel_users_modes[i]);
4770 silc_free(channel_users_modes);
4773 if (channel_topics) {
4776 for (i = 0; i < channel_users_modes_c; i++) {
4777 if (!channel_topics[i])
4780 silc_buffer_push(channel_topics[i],
4781 channel_topics[i]->data -
4782 channel_topics[i]->head);
4783 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4784 silc_buffer_len(channel_topics[i]));
4785 silc_server_packet_send_dest(server, remote,
4786 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4787 channel_ids[i], SILC_ID_CHANNEL,
4788 channel_topics[i]->data,
4789 silc_buffer_len(channel_topics[i]));
4790 silc_buffer_free(channel_topics[i]);
4792 silc_free(channel_topics);
4795 if (channel_invites) {
4798 for (i = 0; i < channel_users_modes_c; i++) {
4799 if (!channel_invites[i])
4802 silc_buffer_push(channel_invites[i],
4803 channel_invites[i]->data -
4804 channel_invites[i]->head);
4805 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4806 silc_buffer_len(channel_invites[i]));
4807 silc_server_packet_send_dest(server, remote,
4808 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4809 channel_ids[i], SILC_ID_CHANNEL,
4810 channel_invites[i]->data,
4811 silc_buffer_len(channel_invites[i]));
4812 silc_buffer_free(channel_invites[i]);
4814 silc_free(channel_invites);
4820 for (i = 0; i < channel_users_modes_c; i++) {
4821 if (!channel_bans[i])
4824 silc_buffer_push(channel_bans[i],
4825 channel_bans[i]->data -
4826 channel_bans[i]->head);
4827 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4828 silc_buffer_len(channel_bans[i]));
4829 silc_server_packet_send_dest(server, remote,
4830 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4831 channel_ids[i], SILC_ID_CHANNEL,
4832 channel_bans[i]->data,
4833 silc_buffer_len(channel_bans[i]));
4834 silc_buffer_free(channel_bans[i]);
4836 silc_free(channel_bans);
4839 silc_free(channel_ids);
4842 /* Announces WATCH list. */
4844 void silc_server_announce_watches(SilcServer server,
4845 SilcPacketStream remote)
4847 SilcHashTableList htl;
4848 SilcBuffer buffer, idp, args, pkp;
4849 SilcClientEntry client;
4852 SILC_LOG_DEBUG(("Announcing watch list"));
4854 /* XXX because way we save the nicks (hash) we cannot announce them. */
4856 /* XXX we should send all public keys in one command if client is
4857 watching more than one key */
4858 silc_hash_table_list(server->watcher_list_pk, &htl);
4859 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4860 if (!client || !client->id)
4863 server->stat.commands_sent++;
4865 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4866 args = silc_buffer_alloc_size(2);
4867 silc_buffer_format(args,
4868 SILC_STR_UI_SHORT(1),
4870 pkp = silc_public_key_payload_encode(key);
4871 args = silc_argument_payload_encode_one(args, pkp->data,
4872 silc_buffer_len(pkp), 0x00);
4873 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4874 ++server->cmd_ident, 2,
4875 1, idp->data, silc_buffer_len(idp),
4877 silc_buffer_len(args));
4880 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4881 buffer->data, silc_buffer_len(buffer));
4883 silc_buffer_free(pkp);
4884 silc_buffer_free(args);
4885 silc_buffer_free(idp);
4886 silc_buffer_free(buffer);
4888 silc_hash_table_list_reset(&htl);
4891 /* Assembles user list and users mode list from the `channel'. */
4893 SilcBool silc_server_get_users_on_channel(SilcServer server,
4894 SilcChannelEntry channel,
4895 SilcBuffer *user_list,
4896 SilcBuffer *mode_list,
4897 SilcUInt32 *user_count)
4899 SilcChannelClientEntry chl;
4900 SilcHashTableList htl;
4901 SilcBuffer client_id_list;
4902 SilcBuffer client_mode_list;
4904 SilcUInt32 list_count = 0, len = 0;
4906 if (!silc_hash_table_count(channel->user_list))
4909 silc_hash_table_list(channel->user_list, &htl);
4910 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4911 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4912 silc_hash_table_list_reset(&htl);
4914 client_id_list = silc_buffer_alloc(len);
4916 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4917 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4918 silc_buffer_pull_tail(client_mode_list,
4919 silc_buffer_truelen(client_mode_list));
4921 silc_hash_table_list(channel->user_list, &htl);
4922 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4924 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4925 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4926 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4927 silc_buffer_free(idp);
4929 /* Client's mode on channel */
4930 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4931 silc_buffer_pull(client_mode_list, 4);
4935 silc_hash_table_list_reset(&htl);
4936 silc_buffer_push(client_id_list,
4937 client_id_list->data - client_id_list->head);
4938 silc_buffer_push(client_mode_list,
4939 client_mode_list->data - client_mode_list->head);
4941 *user_list = client_id_list;
4942 *mode_list = client_mode_list;
4943 *user_count = list_count;
4947 /* Saves users and their modes to the `channel'. */
4949 void silc_server_save_users_on_channel(SilcServer server,
4950 SilcPacketStream sock,
4951 SilcChannelEntry channel,
4952 SilcClientID *noadd,
4953 SilcBuffer user_list,
4954 SilcBuffer mode_list,
4955 SilcUInt32 user_count)
4961 SilcClientEntry client;
4962 SilcIDCacheEntry cache;
4963 SilcChannelClientEntry chl;
4965 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4966 channel->channel_name));
4968 for (i = 0; i < user_count; i++) {
4970 SILC_GET16_MSB(idp_len, user_list->data + 2);
4972 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4974 silc_buffer_pull(user_list, idp_len);
4977 SILC_GET32_MSB(mode, mode_list->data);
4978 silc_buffer_pull(mode_list, 4);
4980 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4985 /* Check if we have this client cached already. */
4986 client = silc_idlist_find_client_by_id(server->local_list,
4988 server->server_type, &cache);
4990 client = silc_idlist_find_client_by_id(server->global_list,
4992 server->server_type, &cache);
4994 /* If router did not find such Client ID in its lists then this must
4995 be bogus client or some router in the net is buggy. */
4996 if (server->server_type != SILC_SERVER)
4999 /* We don't have that client anywhere, add it. The client is added
5000 to global list since server didn't have it in the lists so it must be
5002 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
5003 silc_id_dup(&id.u.client_id,
5005 silc_packet_get_context(sock),
5008 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5012 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5015 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5016 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5017 "%s", channel->channel_name));
5021 if (!silc_server_client_on_channel(client, channel, &chl)) {
5022 /* Client was not on the channel, add it. */
5023 chl = silc_calloc(1, sizeof(*chl));
5024 chl->client = client;
5026 chl->channel = channel;
5027 silc_hash_table_add(channel->user_list, chl->client, chl);
5028 silc_hash_table_add(client->channels, chl->channel, chl);
5029 channel->user_count++;
5037 /* Saves channels and channels user modes to the `client'. Removes
5038 the client from those channels that are not sent in the list but
5041 void silc_server_save_user_channels(SilcServer server,
5042 SilcPacketStream sock,
5043 SilcClientEntry client,
5044 SilcBuffer channels,
5045 SilcBuffer channels_user_modes)
5048 SilcUInt32 *chumodes;
5049 SilcChannelPayload entry;
5050 SilcChannelEntry channel;
5051 SilcChannelID channel_id;
5052 SilcChannelClientEntry chl;
5053 SilcHashTable ht = NULL;
5054 SilcHashTableList htl;
5058 if (!channels || !channels_user_modes ||
5059 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5062 ch = silc_channel_payload_parse_list(channels->data,
5063 silc_buffer_len(channels));
5064 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5066 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5067 NULL, NULL, NULL, TRUE);
5068 silc_dlist_start(ch);
5069 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5070 /* Check if we have this channel, and add it if we don't have it.
5071 Also add the client on the channel unless it is there already. */
5072 if (!silc_channel_get_id_parse(entry, &channel_id))
5074 channel = silc_idlist_find_channel_by_id(server->local_list,
5077 channel = silc_idlist_find_channel_by_id(server->global_list,
5080 if (server->server_type != SILC_SERVER) {
5085 /* We don't have that channel anywhere, add it. */
5086 name = silc_channel_get_name(entry, NULL);
5087 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5088 silc_id_dup(&channel_id,
5090 server->router, NULL, NULL, 0);
5097 channel->mode = silc_channel_get_mode(entry);
5099 /* Add the client on the channel */
5100 if (!silc_server_client_on_channel(client, channel, &chl)) {
5101 chl = silc_calloc(1, sizeof(*chl));
5102 chl->client = client;
5103 chl->mode = chumodes[i++];
5104 chl->channel = channel;
5105 silc_hash_table_add(channel->user_list, chl->client, chl);
5106 silc_hash_table_add(client->channels, chl->channel, chl);
5107 channel->user_count++;
5110 chl->mode = chumodes[i++];
5113 silc_hash_table_add(ht, channel, channel);
5115 silc_channel_payload_list_free(ch);
5116 silc_free(chumodes);
5120 /* Go through the list again and remove client from channels that
5121 are no part of the list. */
5123 silc_hash_table_list(client->channels, &htl);
5124 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5125 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5126 silc_hash_table_del(chl->channel->user_list, chl->client);
5127 silc_hash_table_del(chl->client->channels, chl->channel);
5131 silc_hash_table_list_reset(&htl);
5132 silc_hash_table_free(ht);
5134 silc_hash_table_list(client->channels, &htl);
5135 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5136 silc_hash_table_del(chl->channel->user_list, chl->client);
5137 silc_hash_table_del(chl->client->channels, chl->channel);
5140 silc_hash_table_list_reset(&htl);
5144 /* Lookups route to the client indicated by the `id_data'. The connection
5145 object and internal data object is returned. Returns NULL if route
5146 could not be found to the client. If the `client_id' is specified then
5147 it is used and the `id_data' is ignored. */
5150 silc_server_get_client_route(SilcServer server,
5151 unsigned char *id_data,
5153 SilcClientID *client_id,
5154 SilcIDListData *idata,
5155 SilcClientEntry *client_entry)
5157 SilcClientID *id, clid;
5158 SilcClientEntry client;
5160 SILC_LOG_DEBUG(("Start"));
5163 *client_entry = NULL;
5165 /* Decode destination Client ID */
5167 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5169 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5171 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5174 /* If the destination belongs to our server we don't have to route
5175 the packet anywhere but to send it to the local destination. */
5176 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5180 /* If we are router and the client has router then the client is in
5181 our cell but not directly connected to us. */
5182 if (server->server_type == SILC_ROUTER && client->router) {
5183 /* We are of course in this case the client's router thus the route
5184 to the client is the server who owns the client. So, we will send
5185 the packet to that server. */
5187 *idata = (SilcIDListData)client->router;
5188 return client->router->connection;
5191 /* Seems that client really is directly connected to us */
5193 *idata = (SilcIDListData)client;
5195 *client_entry = client;
5196 return client->connection;
5199 /* Destination belongs to someone not in this server. If we are normal
5200 server our action is to send the packet to our router. */
5201 if (server->server_type != SILC_ROUTER && !server->standalone) {
5204 *idata = (SilcIDListData)server->router;
5205 return SILC_PRIMARY_ROUTE(server);
5208 /* We are router and we will perform route lookup for the destination
5209 and send the packet to fastest route. */
5210 if (server->server_type == SILC_ROUTER && !server->standalone) {
5211 /* Check first that the ID is valid */
5212 client = silc_idlist_find_client_by_id(server->global_list, id,
5215 SilcPacketStream dst_sock;
5217 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5220 if (idata && dst_sock)
5221 *idata = silc_packet_get_context(dst_sock);
5230 /* Encodes and returns channel list of channels the `client' has joined.
5231 Secret channels are not put to the list. */
5233 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5234 SilcClientEntry client,
5235 SilcBool get_private,
5236 SilcBool get_secret,
5237 SilcBuffer *user_mode_list)
5239 SilcBuffer buffer = NULL;
5240 SilcChannelEntry channel;
5241 SilcChannelClientEntry chl;
5242 SilcHashTableList htl;
5243 unsigned char cid[32];
5245 SilcUInt16 name_len;
5249 *user_mode_list = NULL;
5251 silc_hash_table_list(client->channels, &htl);
5252 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5253 channel = chl->channel;
5255 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5257 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5260 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5261 name_len = strlen(channel->channel_name);
5263 len = 4 + name_len + id_len + 4;
5264 buffer = silc_buffer_realloc(buffer,
5266 silc_buffer_truelen(buffer) + len : len));
5267 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5268 silc_buffer_format(buffer,
5269 SILC_STR_UI_SHORT(name_len),
5270 SILC_STR_DATA(channel->channel_name, name_len),
5271 SILC_STR_UI_SHORT(id_len),
5272 SILC_STR_DATA(cid, id_len),
5273 SILC_STR_UI_INT(chl->channel->mode),
5275 silc_buffer_pull(buffer, len);
5277 if (user_mode_list) {
5279 silc_buffer_realloc(*user_mode_list,
5281 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5282 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5283 (*user_mode_list)->data));
5284 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5285 silc_buffer_pull(*user_mode_list, 4);
5288 silc_hash_table_list_reset(&htl);
5291 silc_buffer_push(buffer, buffer->data - buffer->head);
5292 if (user_mode_list && *user_mode_list)
5293 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5294 (*user_mode_list)->head));
5299 /* Task callback used to retrieve network statistical information from
5300 router server once in a while. */
5302 SILC_TASK_CALLBACK(silc_server_get_stats)
5304 SilcServer server = (SilcServer)context;
5305 SilcBuffer idp, packet;
5307 if (!server->standalone) {
5308 SILC_LOG_DEBUG(("Retrieving stats from router"));
5309 server->stat.commands_sent++;
5310 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5312 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5313 ++server->cmd_ident, 1,
5315 silc_buffer_len(idp));
5316 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5317 SILC_PACKET_COMMAND, 0, packet->data,
5318 silc_buffer_len(packet));
5319 silc_buffer_free(packet);
5320 silc_buffer_free(idp);
5324 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,