5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2007 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"
23 /************************* Types and definitions ****************************/
25 SILC_TASK_CALLBACK(silc_server_get_stats);
26 SILC_TASK_CALLBACK(silc_server_connect_router);
27 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
28 SILC_TASK_CALLBACK(silc_server_do_rekey);
29 SILC_TASK_CALLBACK(silc_server_purge_expired_clients);
30 static void silc_server_accept_new_connection(SilcNetStatus status,
33 static void silc_server_packet_parse_type(SilcServer server,
34 SilcPacketStream sock,
36 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
40 /************************ Static utility functions **************************/
42 /* SKE public key verification callback */
45 silc_server_verify_key(SilcSKE ske,
46 SilcPublicKey public_key,
48 SilcSKEVerifyCbCompletion completion,
49 void *completion_context)
51 SilcPacketStream sock = context;
52 SilcUnknownEntry entry = silc_packet_get_context(sock);
54 SILC_LOG_DEBUG(("Verifying public key"));
56 if (silc_pkcs_get_type(public_key) != SILC_SKE_PK_TYPE_SILC) {
57 SILC_LOG_WARNING(("We don't support %s (%s) port %d public key type %d",
58 entry->hostname, entry->ip, entry->port,
59 silc_pkcs_get_type(public_key)));
60 completion(ske, SILC_SKE_STATUS_UNSUPPORTED_PUBLIC_KEY,
65 /* We accept all keys without explicit verification */
66 completion(ske, SILC_SKE_STATUS_OK, completion_context);
70 /************************ Packet engine callbacks ***************************/
72 /* Packet engine callback to receive a packet */
74 static SilcBool silc_server_packet_receive(SilcPacketEngine engine,
75 SilcPacketStream stream,
77 void *callback_context,
80 SilcServer server = callback_context;
81 SilcIDListData idata = stream_context;
86 /* Packets we do not handle */
87 switch (packet->type) {
88 case SILC_PACKET_HEARTBEAT:
89 case SILC_PACKET_SUCCESS:
90 case SILC_PACKET_FAILURE:
91 case SILC_PACKET_REJECT:
92 case SILC_PACKET_KEY_EXCHANGE:
93 case SILC_PACKET_KEY_EXCHANGE_1:
94 case SILC_PACKET_KEY_EXCHANGE_2:
95 case SILC_PACKET_REKEY_DONE:
96 case SILC_PACKET_CONNECTION_AUTH:
101 /* Only specific packets can come without source ID present. */
102 if ((!packet->src_id ||
103 !(idata->status & SILC_IDLIST_STATUS_REGISTERED)) &&
104 packet->type != SILC_PACKET_NEW_CLIENT &&
105 packet->type != SILC_PACKET_NEW_SERVER &&
106 packet->type != SILC_PACKET_RESUME_CLIENT &&
107 packet->type != SILC_PACKET_CONNECTION_AUTH_REQUEST &&
108 packet->type != SILC_PACKET_DISCONNECT)
111 /* NEW_CLIENT and NEW_SERVER are accepted only without source ID and
112 for unregistered connection. */
113 if (packet->src_id && (packet->type == SILC_PACKET_NEW_CLIENT ||
114 packet->type == SILC_PACKET_NEW_SERVER) &&
115 (idata->status & SILC_IDLIST_STATUS_REGISTERED))
118 /* Ignore packets from disabled connection */
119 if (idata->status & SILC_IDLIST_STATUS_DISABLED &&
120 packet->type != SILC_PACKET_HEARTBEAT &&
121 packet->type != SILC_PACKET_RESUME_ROUTER &&
122 packet->type != SILC_PACKET_REKEY)
125 /* Check that the the current client ID is same as in the client's packet. */
126 if (idata->conn_type == SILC_CONN_CLIENT) {
127 SilcClientEntry client = (SilcClientEntry)silc_packet_get_context(stream);
128 SilcClientID client_id;
130 if (client->id && packet->src_id &&
131 silc_id_str2id(packet->src_id, packet->src_id_len,
132 packet->src_id_type, &client_id, sizeof(client_id))) {
133 if (!SILC_ID_CLIENT_COMPARE(client->id, &client_id)) {
134 SILC_LOG_DEBUG(("Packet source is not same as sender, packet %s",
135 silc_get_packet_name(packet->type)));
141 if (server->server_type == SILC_ROUTER) {
142 /* Route the packet if it is not destined to us. Other ID types but
143 server are handled separately after processing them. */
144 if (packet->dst_id &&
145 !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
146 packet->dst_id_type == SILC_ID_SERVER &&
147 idata->conn_type != SILC_CONN_CLIENT &&
148 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
149 SilcPacketStream conn;
150 SilcServerID server_id;
152 silc_id_str2id(packet->dst_id, packet->dst_id_len, packet->dst_id_type,
153 &server_id, sizeof(server_id));
155 conn = silc_server_route_get(server, &server_id, SILC_ID_SERVER);
157 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
158 silc_id_render(&server_id, SILC_ID_SERVER)));
162 silc_server_packet_route(server, conn, packet);
163 silc_packet_free(packet);
168 /* Broadcast packet if it is marked as broadcast packet and it is
169 originated from router and we are router. */
170 if (server->server_type == SILC_ROUTER &&
171 idata->conn_type == SILC_CONN_ROUTER &&
172 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
173 /* Broadcast to our primary route */
174 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
176 /* If we have backup routers then we need to feed all broadcast
177 data to those servers. */
178 silc_server_backup_broadcast(server, stream, packet);
182 silc_server_packet_parse_type(server, stream, packet);
187 /* Packet engine callback to indicate end of stream */
189 static void silc_server_packet_eos(SilcPacketEngine engine,
190 SilcPacketStream stream,
191 void *callback_context,
192 void *stream_context)
194 SilcServer server = callback_context;
195 SilcIDListData idata = silc_packet_get_context(stream);
197 SILC_LOG_DEBUG(("End of stream received"));
202 if (server->router_conn && server->router_conn->sock == stream &&
203 !server->router && server->standalone) {
204 silc_server_create_connections(server);
206 /* If backup disconnected then mark that resuming will not be allowed */
207 if (server->server_type == SILC_ROUTER && !server->backup_router &&
208 idata->conn_type == SILC_CONN_SERVER) {
209 SilcServerEntry server_entry = (SilcServerEntry)idata;
210 if (server_entry->server_type == SILC_BACKUP_ROUTER)
211 server->backup_closed = TRUE;
214 silc_server_free_sock_user_data(server, stream, NULL);
217 silc_server_close_connection(server, stream);
220 SILC_TASK_CALLBACK(silc_server_packet_error_timeout)
222 SilcServer server = app_context;
223 SilcPacketStream stream = context;
224 SilcIDListData idata = silc_packet_get_context(stream);
229 if (server->router_conn && server->router_conn->sock == stream &&
230 !server->router && server->standalone) {
231 silc_server_create_connections(server);
233 /* If backup disconnected then mark that resuming will not be allowed */
234 if (server->server_type == SILC_ROUTER && !server->backup_router &&
235 idata->conn_type == SILC_CONN_SERVER) {
236 SilcServerEntry server_entry = (SilcServerEntry)idata;
237 if (server_entry->server_type == SILC_BACKUP_ROUTER)
238 server->backup_closed = TRUE;
241 silc_server_free_sock_user_data(server, stream, NULL);
244 silc_server_close_connection(server, stream);
247 /* Packet engine callback to indicate error */
249 static void silc_server_packet_error(SilcPacketEngine engine,
250 SilcPacketStream stream,
251 SilcPacketError error,
252 void *callback_context,
253 void *stream_context)
255 SilcServer server = callback_context;
256 SilcIDListData idata = silc_packet_get_context(stream);
257 SilcStream sock = silc_packet_stream_get_stream(stream);
264 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
267 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
268 SILC_CONNTYPE_STRING(idata->conn_type),
269 silc_packet_error_string(error)));
271 silc_schedule_task_add_timeout(server->schedule,
272 silc_server_packet_error_timeout,
276 /* Packet stream callbacks */
277 static SilcPacketCallbacks silc_server_stream_cbs =
279 silc_server_packet_receive,
280 silc_server_packet_eos,
281 silc_server_packet_error
284 /* Parses the packet type and calls what ever routines the packet type
285 requires. This is done for all incoming packets. */
287 static void silc_server_packet_parse_type(SilcServer server,
288 SilcPacketStream sock,
291 SilcPacketType type = packet->type;
292 SilcIDListData idata = silc_packet_get_context(sock);
294 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
295 silc_get_packet_name(type), packet->flags));
297 /* Parse the packet type */
299 case SILC_PACKET_NOTIFY:
301 * Received notify packet. Server can receive notify packets from
302 * router. Server then relays the notify messages to clients if needed.
304 if (packet->flags & SILC_PACKET_FLAG_LIST)
305 silc_server_notify_list(server, sock, packet);
307 silc_server_notify(server, sock, packet);
311 * Private Message packets
313 case SILC_PACKET_PRIVATE_MESSAGE:
315 * Received private message packet. The packet is coming from either
318 if (packet->flags & SILC_PACKET_FLAG_LIST)
320 idata->last_receive = time(NULL);
321 silc_server_private_message(server, sock, packet);
327 case SILC_PACKET_CHANNEL_MESSAGE:
329 * Received channel message. Channel messages are special packets
330 * (although probably most common ones) thus they are handled
333 if (packet->flags & SILC_PACKET_FLAG_LIST)
335 idata->last_receive = time(NULL);
336 silc_server_channel_message(server, sock, packet);
342 case SILC_PACKET_COMMAND:
344 * Recived command. Processes the command request and allocates the
345 * command context and calls the command.
347 if (packet->flags & SILC_PACKET_FLAG_LIST)
349 server->stat.commands_received++;
350 silc_server_command_process(server, sock, packet);
353 case SILC_PACKET_COMMAND_REPLY:
355 * Received command reply packet. Received command reply to command. It
356 * may be reply to command sent by us or reply to command sent by client
357 * that we've routed further.
359 if (packet->flags & SILC_PACKET_FLAG_LIST)
361 server->stat.commands_received++;
362 silc_server_command_reply(server, sock, packet);
365 case SILC_PACKET_DISCONNECT:
368 char *message = NULL;
369 const char *hostname, *ip;
371 if (packet->flags & SILC_PACKET_FLAG_LIST)
373 if (silc_buffer_len(&packet->buffer) < 1)
376 status = (SilcStatus)packet->buffer.data[0];
377 if (silc_buffer_len(&packet->buffer) > 1 &&
378 silc_utf8_valid(packet->buffer.data + 1,
379 silc_buffer_len(&packet->buffer) - 1))
380 message = silc_memdup(packet->buffer.data + 1,
381 silc_buffer_len(&packet->buffer) - 1);
383 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
384 NULL, &hostname, &ip, NULL))
387 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
388 silc_get_status_message(status), status,
389 message ? message : ""));
393 /* Do not switch to backup in case of error */
394 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
396 /* If backup disconnected then mark that resuming will not be allowed */
397 if (server->server_type == SILC_ROUTER && !server->backup_router &&
398 idata->conn_type == SILC_CONN_SERVER) {
399 SilcServerEntry server_entry = (SilcServerEntry)idata;
400 if (server_entry->server_type == SILC_BACKUP_ROUTER)
401 server->backup_closed = TRUE;
404 /* Handle the disconnection from our end too */
405 if (SILC_IS_LOCAL(idata))
406 silc_server_free_sock_user_data(server, sock, NULL);
407 silc_server_close_connection(server, sock);
408 server->backup_noswitch = FALSE;
412 case SILC_PACKET_CHANNEL_KEY:
414 * Received key for channel. As channels are created by the router
415 * the keys are as well. We will distribute the key to all of our
416 * locally connected clients on the particular channel. Router
417 * never receives this channel and thus is ignored.
419 if (packet->flags & SILC_PACKET_FLAG_LIST)
421 silc_server_channel_key(server, sock, packet);
424 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
426 * Private message key packet.
428 if (packet->flags & SILC_PACKET_FLAG_LIST)
430 silc_server_private_message_key(server, sock, packet);
433 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
435 * Connection authentication request packet. When we receive this packet
436 * we will send to the other end information about our mandatory
437 * authentication method for the connection. This packet maybe received
440 if (packet->flags & SILC_PACKET_FLAG_LIST)
442 silc_server_connection_auth_request(server, sock, packet);
445 case SILC_PACKET_NEW_ID:
447 * Received New ID packet. This includes some new ID that has been
448 * created. It may be for client, server or channel. This is the way
449 * to distribute information about new registered entities in the
452 if (packet->flags & SILC_PACKET_FLAG_LIST)
453 silc_server_new_id_list(server, sock, packet);
455 silc_server_new_id(server, sock, packet);
458 case SILC_PACKET_NEW_CLIENT:
460 * Received new client packet. This includes client information that
461 * we will use to create initial client ID. After creating new
462 * ID we will send it to the client.
464 if (packet->flags & SILC_PACKET_FLAG_LIST)
466 silc_server_new_client(server, sock, packet);
469 case SILC_PACKET_NEW_SERVER:
471 * Received new server packet. This includes Server ID and some other
472 * information that we may save. This is received after server has
475 if (packet->flags & SILC_PACKET_FLAG_LIST)
477 silc_server_new_server(server, sock, packet);
480 case SILC_PACKET_NEW_CHANNEL:
482 * Received new channel packet. Information about new channel in the
483 * network are distributed using this packet.
485 if (packet->flags & SILC_PACKET_FLAG_LIST)
486 silc_server_new_channel_list(server, sock, packet);
488 silc_server_new_channel(server, sock, packet);
491 case SILC_PACKET_HEARTBEAT:
493 * Received heartbeat.
495 if (packet->flags & SILC_PACKET_FLAG_LIST)
499 case SILC_PACKET_KEY_AGREEMENT:
501 * Received heartbeat.
503 if (packet->flags & SILC_PACKET_FLAG_LIST)
505 silc_server_key_agreement(server, sock, packet);
508 case SILC_PACKET_REKEY:
510 * Received re-key packet. The sender wants to regenerate the session
513 if (packet->flags & SILC_PACKET_FLAG_LIST)
515 silc_server_rekey(server, sock, packet);
518 case SILC_PACKET_FTP:
520 if (packet->flags & SILC_PACKET_FLAG_LIST)
522 silc_server_ftp(server, sock, packet);
525 case SILC_PACKET_RESUME_CLIENT:
527 if (packet->flags & SILC_PACKET_FLAG_LIST)
529 silc_server_resume_client(server, sock, packet);
532 case SILC_PACKET_RESUME_ROUTER:
533 /* Resume router packet received. This packet is received for backup
534 router resuming protocol. */
535 if (packet->flags & SILC_PACKET_FLAG_LIST)
537 silc_server_backup_resume_router(server, sock, packet);
541 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
546 /****************************** Server API **********************************/
548 /* Allocates a new SILC server object. This has to be done before the server
549 can be used. After allocation one must call silc_server_init to initialize
550 the server. The new allocated server object is returned to the new_server
553 SilcBool silc_server_alloc(SilcServer *new_server)
557 SILC_LOG_DEBUG(("Allocating new server object"));
559 server = silc_calloc(1, sizeof(*server));
562 server->server_type = SILC_SERVER;
563 server->standalone = TRUE;
564 server->local_list = silc_calloc(1, sizeof(*server->local_list));
565 if (!server->local_list)
567 server->global_list = silc_calloc(1, sizeof(*server->global_list));
568 if (!server->global_list)
570 server->pending_commands = silc_dlist_init();
571 if (!server->pending_commands)
573 server->listeners = silc_dlist_init();
574 if (!server->listeners)
576 server->repository = silc_skr_alloc();
577 if (!server->repository)
579 server->conns = silc_dlist_init();
582 server->expired_clients = silc_dlist_init();
583 if (!server->expired_clients)
586 *new_server = server;
591 /* Free's the SILC server object. This is called at the very end before
594 void silc_server_free(SilcServer server)
597 SilcIDCacheEntry cache;
598 SilcIDListData idata;
600 SILC_LOG_DEBUG(("Free server %p", server));
605 silc_server_backup_free(server);
606 silc_server_config_unref(&server->config_ref);
608 silc_rng_free(server->rng);
609 if (server->public_key)
610 silc_pkcs_public_key_free(server->public_key);
611 if (server->private_key)
612 silc_pkcs_private_key_free(server->private_key);
613 if (server->pending_commands)
614 silc_dlist_uninit(server->pending_commands);
615 if (server->id_entry) {
616 if (server->id_entry->data.sconn)
617 silc_schedule_task_del_by_context(server->schedule,
618 server->id_entry->data.sconn->sock);
619 silc_idlist_del_server(server->local_list, server->id_entry);
622 /* Delete all channels */
623 if (silc_idcache_get_all(server->local_list->channels, &list)) {
624 silc_list_start(list);
625 while ((cache = silc_list_get(list)))
626 silc_idlist_del_channel(server->local_list, cache->context);
628 if (silc_idcache_get_all(server->global_list->channels, &list)) {
629 silc_list_start(list);
630 while ((cache = silc_list_get(list)))
631 silc_idlist_del_channel(server->global_list, cache->context);
634 /* Delete all clients */
635 if (silc_idcache_get_all(server->local_list->clients, &list)) {
636 silc_list_start(list);
637 while ((cache = silc_list_get(list))) {
638 silc_schedule_task_del_by_context(server->schedule, cache->context);
639 silc_idlist_del_client(server->local_list, cache->context);
642 if (silc_idcache_get_all(server->global_list->clients, &list)) {
643 silc_list_start(list);
644 while ((cache = silc_list_get(list))) {
645 silc_schedule_task_del_by_context(server->schedule, cache->context);
646 silc_idlist_del_client(server->global_list, cache->context);
650 /* Delete all servers */
651 if (silc_idcache_get_all(server->local_list->servers, &list)) {
652 silc_list_start(list);
653 while ((cache = silc_list_get(list))) {
654 idata = (SilcIDListData)cache->context;
656 silc_schedule_task_del_by_context(server->schedule,
658 silc_idlist_del_server(server->local_list, cache->context);
661 if (silc_idcache_get_all(server->global_list->servers, &list)) {
662 while ((cache = silc_list_get(list))) {
663 idata = (SilcIDListData)cache->context;
665 silc_schedule_task_del_by_context(server->schedule,
667 silc_idlist_del_server(server->global_list, cache->context);
671 silc_schedule_task_del_by_context(server->schedule, server);
672 silc_schedule_uninit(server->schedule);
673 server->schedule = NULL;
675 silc_idcache_free(server->local_list->clients);
676 silc_idcache_free(server->local_list->servers);
677 silc_idcache_free(server->local_list->channels);
678 silc_idcache_free(server->global_list->clients);
679 silc_idcache_free(server->global_list->servers);
680 silc_idcache_free(server->global_list->channels);
681 silc_hash_table_free(server->watcher_list);
682 silc_hash_table_free(server->watcher_list_pk);
683 silc_hash_free(server->md5hash);
684 silc_hash_free(server->sha1hash);
686 silc_dlist_uninit(server->listeners);
687 silc_dlist_uninit(server->conns);
688 silc_dlist_uninit(server->expired_clients);
689 silc_skr_free(server->repository);
690 silc_packet_engine_stop(server->packet_engine);
692 silc_free(server->local_list);
693 silc_free(server->global_list);
694 silc_free(server->server_name);
697 silc_hmac_unregister_all();
698 silc_hash_unregister_all();
699 silc_cipher_unregister_all();
700 silc_pkcs_unregister_all();
703 /* Creates a new server listener. */
705 static SilcNetListener
706 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
708 SilcNetListener listener;
711 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
712 server->config->require_reverse_lookup,
714 silc_server_accept_new_connection, server);
716 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
724 /* Adds a secondary listener. */
726 SilcBool silc_server_init_secondary(SilcServer server)
728 SilcServerConfigServerInfoInterface *interface;
729 SilcNetListener listener;
731 for (interface = server->config->server_info->secondary; interface;
732 interface = interface->next) {
733 listener = silc_server_listen(server, interface->server_ip,
737 silc_dlist_add(server->listeners, listener);
743 /* Initializes the entire SILC server. This is called always before running
744 the server. This is called only once at the initialization of the program.
745 This binds the server to its listenning port. After this function returns
746 one should call silc_server_run to start the server. This returns TRUE
747 when everything is ok to run the server. Configuration file must be
748 read and parsed before calling this. */
750 SilcBool silc_server_init(SilcServer server)
753 SilcServerEntry id_entry;
754 SilcNetListener listener;
758 SILC_LOG_DEBUG(("Initializing server"));
760 server->starttime = time(NULL);
762 /* Take config object for us */
763 silc_server_config_ref(&server->config_ref, server->config,
767 /* Set debugging on if configured */
768 if (server->config->debug_string) {
769 silc_log_debug(TRUE);
770 silc_log_set_debug_string(server->config->debug_string);
772 #endif /* SILC_DEBUG */
774 /* Steal public and private key from the config object */
775 server->public_key = server->config->server_info->public_key;
776 server->private_key = server->config->server_info->private_key;
777 server->config->server_info->public_key = NULL;
778 server->config->server_info->private_key = NULL;
780 /* Register all configured ciphers, PKCS and hash functions. */
781 if (!silc_server_config_register_ciphers(server))
782 silc_cipher_register_default();
783 if (!silc_server_config_register_pkcs(server))
784 silc_pkcs_register_default();
785 if (!silc_server_config_register_hashfuncs(server))
786 silc_hash_register_default();
787 if (!silc_server_config_register_hmacs(server))
788 silc_hmac_register_default();
790 /* Initialize random number generator for the server. */
791 server->rng = silc_rng_alloc();
792 silc_rng_init(server->rng);
793 silc_rng_global_init(server->rng);
795 /* Initialize hash functions for server to use */
796 silc_hash_alloc("md5", &server->md5hash);
797 silc_hash_alloc("sha1", &server->sha1hash);
799 /* Initialize the scheduler */
800 server->schedule = silc_schedule_init(server->config->param.connections_max,
802 if (!server->schedule)
805 /* First, register log files configuration for error output */
806 silc_server_config_setlogfiles(server);
808 /* Initialize ID caches */
809 server->local_list->clients =
810 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
812 server->local_list->servers =
813 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
815 server->local_list->channels =
816 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
819 /* These are allocated for normal server as well as these hold some
820 global information that the server has fetched from its router. For
821 router these are used as they are supposed to be used on router. */
822 server->global_list->clients =
823 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
825 server->global_list->servers =
826 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
828 server->global_list->channels =
829 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
832 /* Init watcher lists */
833 server->watcher_list =
834 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
835 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
837 if (!server->watcher_list)
839 server->watcher_list_pk =
840 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
841 silc_hash_public_key_compare, NULL,
843 if (!server->watcher_list_pk)
846 /* Create TCP listener */
847 listener = silc_server_listen(
849 server->config->server_info->primary == NULL ? NULL :
850 server->config->server_info->primary->server_ip,
851 server->config->server_info->primary == NULL ? 0 :
852 server->config->server_info->primary->port);
855 silc_dlist_add(server->listeners, listener);
857 /* Create a Server ID for the server. */
858 port = silc_net_listener_get_port(listener, NULL);
859 ip = silc_net_listener_get_ip(listener, NULL);
860 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
861 server->config->server_info->primary->public_ip :
862 ip[0], port[0], server->rng, &id);
871 server->server_name = server->config->server_info->server_name;
872 server->config->server_info->server_name = NULL;
873 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
874 sizeof(server->id_string), &server->id_string_len);
876 /* Add ourselves to the server list. We don't have a router yet
877 beacuse we haven't established a route yet. It will be done later.
878 For now, NULL is sent as router. This allocates new entry to
881 silc_idlist_add_server(server->local_list, strdup(server->server_name),
883 silc_id_dup(server->id, SILC_ID_SERVER),
886 SILC_LOG_ERROR(("Could not add local server to cache"));
889 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
890 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
891 SILC_CONN_SERVER : SILC_CONN_ROUTER);
892 server->id_entry = id_entry;
894 /* Create secondary TCP listeners */
895 if (silc_server_init_secondary(server) == FALSE)
898 server->listenning = TRUE;
900 /* Create connections to configured routers. */
901 silc_server_create_connections(server);
903 /* If server connections has been configured then we must be router as
904 normal server cannot have server connections, only router connections. */
905 if (server->config->servers) {
906 SilcServerConfigServer *ptr = server->config->servers;
908 server->server_type = SILC_ROUTER;
910 if (ptr->backup_router) {
911 server->server_type = SILC_BACKUP_ROUTER;
912 server->backup_router = TRUE;
913 server->id_entry->server_type = SILC_BACKUP_ROUTER;
920 if (server->server_type != SILC_ROUTER) {
921 server->stat.servers = 1;
922 server->stat.cell_servers = 1;
924 server->stat.routers = 1;
927 /* If we are normal server we'll retrieve network statisticial information
928 once in a while from the router. */
929 if (server->server_type != SILC_ROUTER)
930 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
933 /* Start packet engine */
934 server->packet_engine =
935 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
936 &silc_server_stream_cbs, server);
937 if (!server->packet_engine)
940 /* Register client entry expiration timeout */
941 silc_schedule_task_add_timeout(server->schedule,
942 silc_server_purge_expired_clients, server,
945 /* Initialize HTTP server */
946 silc_server_http_init(server);
948 SILC_LOG_DEBUG(("Server initialized"));
950 /* We are done here, return succesfully */
954 silc_server_config_unref(&server->config_ref);
958 /* Task callback to close a socket connection after rehash */
960 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
962 SilcServer server = app_context;
963 SilcPacketStream sock = context;
964 SilcIDListData idata = silc_packet_get_context(sock);
965 const char *hostname;
968 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
969 NULL, &hostname, NULL, &port);
971 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
972 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
973 silc_schedule_task_del_by_context(server->schedule, sock);
974 silc_server_disconnect_remote(server, sock,
975 SILC_STATUS_ERR_BANNED_FROM_SERVER,
976 "This connection is removed from "
978 silc_server_free_sock_user_data(server, sock, NULL);
981 /* This function basically reads the config file again and switches the config
982 object pointed by the server object. After that, we have to fix various
983 things such as the server_name and the listening ports.
984 Keep in mind that we no longer have the root privileges at this point. */
986 SilcBool silc_server_rehash(SilcServer server)
988 SilcServerConfig newconfig;
990 SILC_LOG_INFO(("Rehashing server"));
992 /* Reset the logging system */
993 silc_log_quick(TRUE);
994 silc_log_flush_all();
996 /* Start the main rehash phase (read again the config file) */
997 newconfig = silc_server_config_alloc(server->config_file, server);
999 SILC_LOG_ERROR(("Rehash FAILED."));
1003 /* Fix the server_name field */
1004 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1005 silc_free(server->server_name);
1007 /* Check server name */
1008 server->server_name =
1009 silc_identifier_check(newconfig->server_info->server_name,
1010 strlen(newconfig->server_info->server_name),
1011 SILC_STRING_LOCALE, 256, NULL);
1012 if (!server->server_name) {
1013 SILC_LOG_ERROR(("Malformed server name string '%s'",
1014 server->config->server_info->server_name));
1018 /* Update the idcache list with a fresh pointer */
1019 silc_free(server->id_entry->server_name);
1020 server->id_entry->server_name = strdup(server->server_name);
1021 silc_idcache_update_by_context(server->local_list->servers,
1022 server->id_entry, NULL,
1023 strdup(server->id_entry->server_name),
1028 silc_server_config_setlogfiles(server);
1030 /* Change new key pair if necessary */
1031 if (newconfig->server_info->public_key &&
1032 !silc_pkcs_public_key_compare(server->public_key,
1033 newconfig->server_info->public_key)) {
1034 silc_pkcs_public_key_free(server->public_key);
1035 silc_pkcs_private_key_free(server->private_key);
1036 server->public_key = newconfig->server_info->public_key;
1037 server->private_key = newconfig->server_info->private_key;
1038 newconfig->server_info->public_key = NULL;
1039 newconfig->server_info->private_key = NULL;
1042 /* Check for unconfigured server and router connections and close
1043 connections that were unconfigured. */
1045 if (server->config->routers) {
1046 SilcServerConfigRouter *ptr;
1047 SilcServerConfigRouter *newptr;
1050 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1053 /* Check whether new config has this one too */
1054 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1055 if (silc_string_compare(newptr->host, ptr->host) &&
1056 newptr->port == ptr->port &&
1057 newptr->initiator == ptr->initiator) {
1063 if (!found && ptr->host) {
1064 /* Remove this connection */
1065 SilcPacketStream sock;
1066 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1067 ptr->host, ptr->port);
1069 silc_schedule_task_add_timeout(server->schedule,
1070 silc_server_rehash_close_connection,
1076 if (server->config->servers) {
1077 SilcServerConfigServer *ptr;
1078 SilcServerConfigServer *newptr;
1081 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1084 /* Check whether new config has this one too */
1085 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1086 if (silc_string_compare(newptr->host, ptr->host)) {
1092 if (!found && ptr->host) {
1093 /* Remove this connection */
1094 SilcPacketStream sock;
1095 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1098 silc_schedule_task_add_timeout(server->schedule,
1099 silc_server_rehash_close_connection,
1105 if (server->config->clients) {
1106 SilcServerConfigClient *ptr;
1107 SilcServerConfigClient *newptr;
1110 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1113 /* Check whether new config has this one too */
1114 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1115 if (silc_string_compare(newptr->host, ptr->host)) {
1121 if (!found && ptr->host) {
1122 /* Remove this connection */
1123 SilcPacketStream sock;
1124 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1127 silc_schedule_task_add_timeout(server->schedule,
1128 silc_server_rehash_close_connection,
1134 /* Create connections after rehash */
1135 silc_server_create_connections(server);
1137 /* Check whether our router status has changed */
1138 if (newconfig->servers) {
1139 SilcServerConfigServer *ptr = newconfig->servers;
1141 server->server_type = SILC_ROUTER;
1143 if (ptr->backup_router) {
1144 server->server_type = SILC_BACKUP_ROUTER;
1145 server->backup_router = TRUE;
1146 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1153 /* Our old config is gone now. We'll unreference our reference made in
1154 silc_server_init and then destroy it since we are destroying it
1155 underneath the application (layer which called silc_server_init). */
1156 silc_server_config_unref(&server->config_ref);
1157 silc_server_config_destroy(server->config);
1159 /* Take new config context */
1160 server->config = newconfig;
1161 silc_server_config_ref(&server->config_ref, server->config, server->config);
1164 /* Set debugging on if configured */
1165 if (server->config->debug_string) {
1166 silc_log_debug(TRUE);
1167 silc_log_set_debug_string(server->config->debug_string);
1169 #endif /* SILC_DEBUG */
1171 SILC_LOG_DEBUG(("Server rehashed"));
1176 /* The heart of the server. This runs the scheduler thus runs the server.
1177 When this returns the server has been stopped and the program will
1180 void silc_server_run(SilcServer server)
1182 SILC_LOG_INFO(("SILC Server started"));
1184 /* Start the scheduler, the heart of the SILC server. When this returns
1185 the program will be terminated. */
1186 silc_schedule(server->schedule);
1189 /* Stops the SILC server. This function is used to shutdown the server.
1190 This is usually called after the scheduler has returned. After stopping
1191 the server one should call silc_server_free. */
1193 void silc_server_stop(SilcServer server)
1196 SilcPacketStream ps;
1197 SilcNetListener listener;
1199 SILC_LOG_INFO(("SILC Server shutting down"));
1201 server->server_shutdown = TRUE;
1203 /* Close all connections */
1204 if (server->packet_engine) {
1205 list = silc_packet_engine_get_streams(server->packet_engine);
1207 silc_dlist_start(list);
1208 while ((ps = silc_dlist_get(list))) {
1209 SilcIDListData idata = silc_packet_get_context(ps);
1211 if (!silc_packet_stream_is_valid(ps))
1215 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1217 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1218 "Server is shutting down");
1219 silc_server_free_sock_user_data(server, ps,
1220 "Server is shutting down");
1222 silc_packet_engine_free_streams_list(list);
1225 /* We are not connected to network anymore */
1226 server->standalone = TRUE;
1228 silc_dlist_start(server->listeners);
1229 while ((listener = silc_dlist_get(server->listeners)))
1230 silc_net_close_listener(listener);
1232 silc_server_http_uninit(server);
1234 /* Cancel any possible retry timeouts */
1235 silc_schedule_task_del_by_callback(server->schedule,
1236 silc_server_connect_router);
1237 silc_schedule_task_del_by_callback(server->schedule,
1238 silc_server_connect_to_router_retry);
1239 silc_schedule_task_del_by_callback(server->schedule,
1240 silc_server_connect_to_router);
1242 silc_schedule_stop(server->schedule);
1244 SILC_LOG_DEBUG(("Server stopped"));
1247 /* Purge expired client entries from the server */
1249 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1251 SilcServer server = context;
1252 SilcClientEntry client;
1254 SilcUInt64 curtime = silc_time();
1256 SILC_LOG_DEBUG(("Expire timeout"));
1258 silc_dlist_start(server->expired_clients);
1259 while ((client = silc_dlist_get(server->expired_clients))) {
1260 if (client->data.status & SILC_IDLIST_STATUS_REGISTERED)
1263 /* For unregistered clients the created timestamp is actually
1264 unregistered timestamp. Make sure client remains in history
1265 at least 500 seconds. */
1266 if (curtime - client->data.created < 500)
1269 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1270 server->local_list : server->global_list);
1272 silc_idlist_del_data(client);
1273 silc_idlist_del_client(id_list, client);
1274 silc_dlist_del(server->expired_clients, client);
1277 silc_schedule_task_add_timeout(server->schedule,
1278 silc_server_purge_expired_clients, server,
1283 /******************************* Connecting *********************************/
1285 /* Free connection context */
1287 void silc_server_connection_free(SilcServerConnection sconn)
1289 SILC_LOG_DEBUG(("Free connection %p", sconn));
1290 silc_dlist_del(sconn->server->conns, sconn);
1291 silc_server_config_unref(&sconn->conn);
1292 silc_free(sconn->remote_host);
1293 silc_free(sconn->backup_replace_ip);
1297 /* Creates connection to a remote router. */
1299 void silc_server_create_connection(SilcServer server,
1302 const char *remote_host, SilcUInt32 port,
1303 SilcServerConnectCallback callback,
1306 SilcServerConnection sconn;
1308 /* Allocate connection object for hold connection specific stuff. */
1309 sconn = silc_calloc(1, sizeof(*sconn));
1312 sconn->remote_host = strdup(remote_host);
1313 sconn->remote_port = port;
1314 sconn->no_reconnect = reconnect == FALSE;
1315 sconn->callback = callback;
1316 sconn->callback_context = context;
1317 sconn->no_conf = dynamic;
1318 sconn->server = server;
1320 SILC_LOG_DEBUG(("Created connection %p", sconn));
1322 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1326 /* Connection authentication completion callback */
1329 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1332 SilcServerConnection sconn = context;
1333 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1334 SilcServer server = entry->server;
1335 SilcServerConfigServer *conn;
1336 SilcServerConfigConnParams *param;
1337 SilcIDListData idata;
1338 SilcServerEntry id_entry = NULL;
1339 unsigned char id[32];
1344 SILC_LOG_DEBUG(("Connection authentication completed"));
1348 if (success == FALSE) {
1349 /* Authentication failed */
1350 /* XXX retry connecting */
1352 silc_server_disconnect_remote(server, sconn->sock,
1353 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1354 if (sconn->callback)
1355 (*sconn->callback)(server, NULL, sconn->callback_context);
1356 silc_server_connection_free(sconn);
1360 /* XXX For now remote is router always */
1361 entry->data.conn_type = SILC_CONN_ROUTER;
1363 SILC_LOG_INFO(("Connected to %s %s",
1364 SILC_CONNTYPE_STRING(entry->data.conn_type),
1365 sconn->remote_host));
1367 /* Create the actual entry for remote entity */
1368 switch (entry->data.conn_type) {
1369 case SILC_CONN_SERVER:
1370 SILC_LOG_DEBUG(("Remote is SILC server"));
1372 /* Add new server. The server must register itself to us before it
1373 becomes registered to SILC network. */
1374 id_entry = silc_idlist_add_server(server->local_list,
1375 strdup(sconn->remote_host),
1376 SILC_SERVER, NULL, NULL, sconn->sock);
1378 silc_server_disconnect_remote(server, sconn->sock,
1379 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1380 if (sconn->callback)
1381 (*sconn->callback)(server, NULL, sconn->callback_context);
1382 silc_server_connection_free(sconn);
1388 server->stat.my_servers++;
1389 if (server->server_type == SILC_ROUTER)
1390 server->stat.servers++;
1391 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1393 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1396 case SILC_CONN_ROUTER:
1397 SILC_LOG_DEBUG(("Remote is SILC router"));
1399 /* Register to network */
1400 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1401 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1402 SILC_STR_UI_SHORT(id_len),
1403 SILC_STR_DATA(id, id_len),
1404 SILC_STR_UI_SHORT(strlen(server->server_name)),
1405 SILC_STR_DATA(server->server_name,
1406 strlen(server->server_name)),
1408 silc_server_disconnect_remote(server, sconn->sock,
1409 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1410 if (sconn->callback)
1411 (*sconn->callback)(server, NULL, sconn->callback_context);
1412 silc_server_connection_free(sconn);
1418 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1420 /* Check that we do not have this ID already */
1421 id_entry = silc_idlist_find_server_by_id(server->local_list,
1422 &remote_id.u.server_id,
1425 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1427 id_entry = silc_idlist_find_server_by_id(server->global_list,
1428 &remote_id.u.server_id,
1431 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1435 SILC_LOG_DEBUG(("New server id(%s)",
1436 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1438 /* Add the connected router to global server list. Router is sent
1439 as NULL since it's local to us. */
1440 id_entry = silc_idlist_add_server(server->global_list,
1441 strdup(sconn->remote_host),
1443 silc_id_dup(&remote_id.u.server_id,
1447 silc_server_disconnect_remote(server, sconn->sock,
1448 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1449 if (sconn->callback)
1450 (*sconn->callback)(server, NULL, sconn->callback_context);
1451 silc_server_connection_free(sconn);
1457 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1458 idata = (SilcIDListData)id_entry;
1459 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1460 SILC_IDLIST_STATUS_LOCAL);
1461 idata->sconn = sconn;
1464 server->stat.my_routers++;
1465 if (server->server_type == SILC_ROUTER)
1466 server->stat.routers++;
1467 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1469 if (!sconn->backup) {
1470 /* Mark this router our primary router if we're still standalone */
1471 if (server->standalone) {
1472 SILC_LOG_DEBUG(("This connection is our primary router"));
1473 server->id_entry->router = id_entry;
1474 server->router = id_entry;
1475 server->router->server_type = SILC_ROUTER;
1476 server->standalone = FALSE;
1477 server->backup_primary = FALSE;
1479 /* Announce data if we are not backup router (unless not as primary
1480 currently). Backup router announces later at the end of
1481 resuming protocol. */
1482 if (server->backup_router && server->server_type == SILC_ROUTER) {
1483 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1485 /* If we are router then announce our possible servers. Backup
1486 router announces also global servers. */
1487 if (server->server_type == SILC_ROUTER)
1488 silc_server_announce_servers(server,
1489 server->backup_router ? TRUE : FALSE,
1490 0, SILC_PRIMARY_ROUTE(server));
1492 /* Announce our clients and channels to the router */
1493 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1494 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1497 /* If we are backup router then this primary router is whom we are
1499 if (server->server_type == SILC_BACKUP_ROUTER) {
1500 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1502 NULL, NULL, &ip, NULL);
1503 silc_server_backup_add(server, server->id_entry, ip,
1504 sconn->remote_port, TRUE);
1508 /* We already have primary router. Disconnect this connection */
1509 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1510 silc_idlist_del_server(server->global_list, id_entry);
1511 silc_server_disconnect_remote(server, sconn->sock,
1512 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1513 if (sconn->callback)
1514 (*sconn->callback)(server, NULL, sconn->callback_context);
1515 silc_server_connection_free(sconn);
1521 /* Add this server to be our backup router */
1522 id_entry->server_type = SILC_BACKUP_ROUTER;
1523 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1524 sconn->backup_replace_port, FALSE);
1530 silc_server_disconnect_remote(server, sconn->sock,
1531 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1532 if (sconn->callback)
1533 (*sconn->callback)(server, NULL, sconn->callback_context);
1534 silc_server_connection_free(sconn);
1539 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1541 conn = sconn->conn.ref_ptr;
1542 param = &server->config->param;
1543 if (conn && conn->param)
1544 param = conn->param;
1546 /* Register rekey timeout */
1547 sconn->rekey_timeout = param->key_exchange_rekey;
1548 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1549 sconn->sock, sconn->rekey_timeout, 0);
1551 /* Set the entry as packet stream context */
1552 silc_packet_set_context(sconn->sock, id_entry);
1554 /* Call the completion callback to indicate that we've connected to
1556 if (sconn && sconn->callback)
1557 (*sconn->callback)(server, id_entry, sconn->callback_context);
1559 if (sconn == server->router_conn)
1560 server->router_conn = NULL;
1565 /* SKE completion callback */
1567 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1568 SilcSKESecurityProperties prop,
1569 SilcSKEKeyMaterial keymat,
1570 SilcSKERekeyMaterial rekey,
1573 SilcPacketStream sock = context;
1574 SilcUnknownEntry entry = silc_packet_get_context(sock);
1575 SilcServerConnection sconn = silc_ske_get_context(ske);
1576 SilcServer server = entry->server;
1577 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1578 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1579 void *auth_data = NULL;
1580 SilcUInt32 auth_data_len = 0;
1581 SilcConnAuth connauth;
1582 SilcCipher send_key, receive_key;
1583 SilcHmac hmac_send, hmac_receive;
1588 if (status != SILC_SKE_STATUS_OK) {
1590 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1591 silc_ske_map_status(status), entry->hostname, entry->ip));
1593 /* XXX retry connecting */
1595 silc_server_disconnect_remote(server, sconn->sock,
1596 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1597 if (sconn->callback)
1598 (*sconn->callback)(server, NULL, sconn->callback_context);
1599 silc_server_connection_free(sconn);
1603 SILC_LOG_DEBUG(("Setting keys into use"));
1605 /* Set the keys into use. The data will be encrypted after this. */
1606 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1607 &hmac_send, &hmac_receive, &hash)) {
1609 /* XXX retry connecting */
1611 /* Error setting keys */
1613 silc_server_disconnect_remote(server, sconn->sock,
1614 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1615 if (sconn->callback)
1616 (*sconn->callback)(server, NULL, sconn->callback_context);
1617 silc_server_connection_free(sconn);
1620 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1621 hmac_receive, FALSE);
1623 SILC_LOG_DEBUG(("Starting connection authentication"));
1625 connauth = silc_connauth_alloc(server->schedule, ske,
1626 server->config->conn_auth_timeout);
1628 /* XXX retry connecting */
1630 /** Error allocating auth protocol */
1632 silc_server_disconnect_remote(server, sconn->sock,
1633 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1634 if (sconn->callback)
1635 (*sconn->callback)(server, NULL, sconn->callback_context);
1636 silc_server_connection_free(sconn);
1640 /* Get authentication method */
1642 if (conn->passphrase) {
1643 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1644 auth_meth = SILC_AUTH_PUBLIC_KEY;
1645 auth_data = server->private_key;
1647 auth_meth = SILC_AUTH_PASSWORD;
1648 auth_data = conn->passphrase;
1649 auth_data_len = conn->passphrase_len;
1652 auth_meth = SILC_AUTH_PUBLIC_KEY;
1653 auth_data = server->private_key;
1657 entry->data.rekey = rekey;
1659 /* Start connection authentication */
1661 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1662 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1663 auth_data, auth_data_len,
1664 silc_server_ke_auth_compl, sconn);
1667 /* Function that is called when the network connection to a router has
1668 been established. This will continue with the key exchange protocol
1669 with the remote router. */
1671 void silc_server_start_key_exchange(SilcServerConnection sconn)
1673 SilcServer server = sconn->server;
1674 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1675 SilcUnknownEntry entry;
1676 SilcSKEParamsStruct params;
1679 /* Cancel any possible retry timeouts */
1680 silc_schedule_task_del_by_context(server->schedule, sconn);
1682 /* Create packet stream */
1683 sconn->sock = silc_packet_stream_create(server->packet_engine,
1684 server->schedule, sconn->stream);
1686 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1687 silc_stream_destroy(sconn->stream);
1688 if (sconn->callback)
1689 (*sconn->callback)(server, NULL, sconn->callback_context);
1690 silc_server_connection_free(sconn);
1693 server->stat.conn_num++;
1695 /* Set source ID to packet stream */
1696 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1698 silc_packet_stream_destroy(sconn->sock);
1699 if (sconn->callback)
1700 (*sconn->callback)(server, NULL, sconn->callback_context);
1701 silc_server_connection_free(sconn);
1705 /* Create entry for remote entity */
1706 entry = silc_calloc(1, sizeof(*entry));
1708 silc_packet_stream_destroy(sconn->sock);
1709 silc_server_connection_free(sconn);
1712 entry->server = server;
1713 silc_packet_set_context(sconn->sock, entry);
1715 /* Set Key Exchange flags from configuration, but fall back to global
1717 memset(¶ms, 0, sizeof(params));
1718 SILC_GET_SKE_FLAGS(conn, params.flags);
1719 if (server->config->param.key_exchange_pfs)
1720 params.flags |= SILC_SKE_SP_FLAG_PFS;
1722 /* Start SILC Key Exchange protocol */
1723 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1724 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1725 server->public_key, server->private_key, sconn);
1728 silc_packet_stream_destroy(sconn->sock);
1729 if (sconn->callback)
1730 (*sconn->callback)(server, NULL, sconn->callback_context);
1731 silc_server_connection_free(sconn);
1734 silc_ske_set_callbacks(ske, silc_server_verify_key,
1735 silc_server_ke_completed, sconn->sock);
1737 /* Start key exchange protocol */
1738 params.version = silc_version_string;
1739 params.timeout_secs = server->config->key_exchange_timeout;
1740 sconn->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1743 /* Timeout callback that will be called to retry connecting to remote
1744 router. This is used by both normal and router server. This will wait
1745 before retrying the connecting. The timeout is generated by exponential
1746 backoff algorithm. */
1748 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1750 SilcServerConnection sconn = context;
1751 SilcServer server = sconn->server;
1752 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1753 SilcServerConfigConnParams *param =
1754 (conn->param ? conn->param : &server->config->param);
1756 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1757 sconn->remote_port));
1759 /* Calculate next timeout */
1760 if (sconn->retry_count >= 1) {
1761 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1762 if (sconn->retry_timeout > param->reconnect_interval_max)
1763 sconn->retry_timeout = param->reconnect_interval_max;
1765 sconn->retry_timeout = param->reconnect_interval;
1767 sconn->retry_count++;
1768 sconn->retry_timeout = sconn->retry_timeout +
1769 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1771 /* If we've reached max retry count, give up. */
1772 if ((sconn->retry_count > param->reconnect_count) &&
1773 !param->reconnect_keep_trying) {
1774 SILC_LOG_ERROR(("Could not connect, giving up"));
1776 if (sconn->callback)
1777 (*sconn->callback)(server, NULL, sconn->callback_context);
1778 silc_server_connection_free(sconn);
1782 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1784 /* We will lookup a fresh pointer later */
1785 silc_server_config_unref(&sconn->conn);
1787 /* Wait before retrying */
1788 silc_schedule_task_del_by_context(server->schedule, sconn);
1789 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1790 sconn, sconn->retry_timeout, 0);
1793 /* Callback for async connection to remote router */
1795 static void silc_server_connection_established(SilcNetStatus status,
1799 SilcServerConnection sconn = context;
1800 SilcServer server = sconn->server;
1802 silc_schedule_task_del_by_context(server->schedule, sconn);
1807 SILC_LOG_DEBUG(("Connection to %s:%d established",
1808 sconn->remote_host, sconn->remote_port));
1810 /* Continue with key exchange protocol */
1811 sconn->stream = stream;
1812 silc_server_start_key_exchange(sconn);
1815 case SILC_NET_UNKNOWN_IP:
1816 case SILC_NET_UNKNOWN_HOST:
1817 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1818 sconn->remote_host, sconn->remote_port,
1819 silc_net_get_error_string(status)));
1821 if (sconn->callback)
1822 (*sconn->callback)(server, NULL, sconn->callback_context);
1823 silc_server_connection_free(sconn);
1827 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1828 sconn->remote_host, sconn->remote_port,
1829 silc_net_get_error_string(status)));
1830 if (!sconn->no_reconnect) {
1831 silc_schedule_task_add_timeout(sconn->server->schedule,
1832 silc_server_connect_to_router_retry,
1834 silc_dlist_del(server->conns, sconn);
1836 if (sconn->callback)
1837 (*sconn->callback)(server, NULL, sconn->callback_context);
1838 silc_server_connection_free(sconn);
1844 /* Generic routine to use connect to a router. */
1846 SILC_TASK_CALLBACK(silc_server_connect_router)
1848 SilcServerConnection sconn = context;
1849 SilcServer server = sconn->server;
1850 SilcServerConfigRouter *rconn;
1852 silc_schedule_task_del_by_context(server->schedule, sconn);
1854 /* Don't connect if we are shutting down. */
1855 if (server->server_shutdown) {
1856 if (sconn->callback)
1857 (*sconn->callback)(server, NULL, sconn->callback_context);
1858 silc_server_connection_free(sconn);
1862 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1863 (sconn->backup ? "backup router" : "router"),
1864 sconn->remote_host, sconn->remote_port));
1866 if (!sconn->no_conf) {
1867 /* Find connection configuration */
1868 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1869 sconn->remote_port);
1871 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1872 (sconn->backup ? "backup router" : "router"),
1873 sconn->remote_host, sconn->remote_port));
1874 silc_server_connection_free(sconn);
1877 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1880 /* Connect to remote host */
1882 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1883 server->config->server_info->primary->server_ip),
1884 sconn->remote_host, sconn->remote_port,
1885 server->schedule, silc_server_connection_established,
1888 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1889 sconn->remote_host, sconn->remote_port));
1890 silc_server_connection_free(sconn);
1894 /* Add to connection list */
1895 silc_dlist_add(server->conns, sconn);
1898 /* This function connects to our primary router or if we are a router this
1899 establishes all our primary routes. This is called at the start of the
1900 server to do authentication and key exchange with our router - called
1903 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1905 SilcServer server = context;
1906 SilcServerConnection sconn;
1907 SilcServerConfigRouter *ptr;
1909 /* Don't connect if we are shutting down. */
1910 if (server->server_shutdown)
1913 SILC_LOG_DEBUG(("We are %s",
1914 (server->server_type == SILC_SERVER ?
1915 "normal server" : server->server_type == SILC_ROUTER ?
1916 "router" : "backup router/normal server")));
1918 if (!server->config->routers) {
1919 /* There wasn't a configured router, we will continue but we don't
1920 have a connection to outside world. We will be standalone server. */
1921 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1922 server->standalone = TRUE;
1926 /* Cancel any possible retry timeouts */
1927 silc_schedule_task_del_by_callback(server->schedule,
1928 silc_server_connect_router);
1929 silc_schedule_task_del_by_callback(server->schedule,
1930 silc_server_connect_to_router_retry);
1932 /* Create the connections to all our routes */
1933 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1935 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1936 ptr->backup_router ? "Backup router" : "Router",
1937 ptr->initiator ? "Initiator" : "Responder",
1938 ptr->host, ptr->port));
1940 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1941 ptr->initiator == FALSE && !server->backup_router &&
1942 !silc_server_config_get_backup_router(server))
1943 server->wait_backup = TRUE;
1945 if (!ptr->initiator)
1947 if (ptr->dynamic_connection)
1950 /* Check whether we are connecting or connected to this host already */
1951 if (silc_server_num_sockets_by_remote(server,
1952 silc_net_is_ip(ptr->host) ?
1954 silc_net_is_ip(ptr->host) ?
1955 NULL : ptr->host, ptr->port,
1956 SILC_CONN_ROUTER)) {
1957 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1958 ptr->host, ptr->port));
1960 /* If we don't have primary router and this connection is our
1961 primary router we are in desync. Reconnect to the primary. */
1962 if (server->standalone && !server->router) {
1964 SilcPacketStream sock;
1965 SilcServerConfigRouter *primary =
1966 silc_server_config_get_primary_router(server);
1969 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1970 ptr->host, ptr->port);
1973 server->backup_noswitch = TRUE;
1974 silc_server_free_sock_user_data(server, sock, NULL);
1975 silc_server_disconnect_remote(server, sock, 0, NULL);
1976 server->backup_noswitch = FALSE;
1977 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1983 /* Allocate connection object for hold connection specific stuff. */
1984 sconn = silc_calloc(1, sizeof(*sconn));
1987 sconn->server = server;
1988 sconn->remote_host = strdup(ptr->host);
1989 sconn->remote_port = ptr->port;
1990 sconn->backup = ptr->backup_router;
1991 if (sconn->backup) {
1992 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1993 sconn->backup_replace_port = ptr->backup_replace_port;
1996 SILC_LOG_DEBUG(("Created connection %p", sconn));
1998 if (!server->router_conn && !sconn->backup)
1999 server->router_conn = sconn;
2002 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2008 /************************ Accepting new connection **************************/
2010 /* After this is called, server don't wait for backup router anymore.
2011 This gets called automatically even after we have backup router
2012 connection established. */
2014 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2016 SilcServer server = context;
2017 server->wait_backup = FALSE;
2020 /* Authentication data callback */
2023 silc_server_accept_get_auth(SilcConnAuth connauth,
2024 SilcConnectionType conn_type,
2025 unsigned char **passphrase,
2026 SilcUInt32 *passphrase_len,
2027 SilcSKR *repository,
2030 SilcPacketStream sock = context;
2031 SilcUnknownEntry entry = silc_packet_get_context(sock);
2032 SilcServer server = entry->server;
2034 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2036 /* Remote end is client */
2037 if (conn_type == SILC_CONN_CLIENT) {
2038 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2042 *passphrase = cconfig->passphrase;
2043 *passphrase_len = cconfig->passphrase_len;
2044 if (cconfig->publickeys)
2045 *repository = server->repository;
2047 if (cconfig->publickeys) {
2048 if (server->config->prefer_passphrase_auth) {
2052 *passphrase_len = 0;
2056 entry->conn_type = conn_type;
2060 /* Remote end is server */
2061 if (conn_type == SILC_CONN_SERVER) {
2062 SilcServerConfigServer *sconfig;
2064 /* If we are normal server, don't accept the connection */
2065 if (server->server_type == SILC_SERVER)
2068 sconfig = entry->sconfig.ref_ptr;
2072 *passphrase = sconfig->passphrase;
2073 *passphrase_len = sconfig->passphrase_len;
2074 if (sconfig->publickeys)
2075 *repository = server->repository;
2077 if (sconfig->publickeys) {
2078 if (server->config->prefer_passphrase_auth) {
2082 *passphrase_len = 0;
2086 entry->conn_type = conn_type;
2090 /* Remote end is router */
2091 if (conn_type == SILC_CONN_ROUTER) {
2092 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2096 *passphrase = rconfig->passphrase;
2097 *passphrase_len = rconfig->passphrase_len;
2098 if (rconfig->publickeys)
2099 *repository = server->repository;
2101 if (rconfig->publickeys) {
2102 if (server->config->prefer_passphrase_auth) {
2106 *passphrase_len = 0;
2110 entry->conn_type = conn_type;
2117 /* Authentication completion callback. */
2120 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2123 SilcPacketStream sock = context;
2124 SilcUnknownEntry entry = silc_packet_get_context(sock);
2125 SilcIDListData idata = (SilcIDListData)entry;
2126 SilcServer server = entry->server;
2127 SilcServerConfigConnParams *param = &server->config->param;
2128 SilcServerConnection sconn;
2130 const char *hostname, *ip;
2134 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2135 NULL, &hostname, &ip, &port);
2137 if (success == FALSE) {
2138 /* Authentication failed */
2139 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2140 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2141 server->stat.auth_failures++;
2142 silc_server_disconnect_remote(server, sock,
2143 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2147 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2149 switch (entry->conn_type) {
2150 case SILC_CONN_CLIENT:
2152 SilcClientEntry client;
2153 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2155 /* Verify whether this connection is after all allowed to connect */
2156 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2157 &server->config->param,
2159 silc_connauth_get_ske(connauth))) {
2160 server->stat.auth_failures++;
2164 /* If we are primary router and we have backup router configured
2165 but it has not connected to use yet, do not accept any other
2167 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2168 !server->backup_router) {
2169 SilcServerConfigRouter *router;
2170 router = silc_server_config_get_backup_router(server);
2171 if (router && strcmp(server->config->server_info->primary->server_ip,
2173 silc_server_find_socket_by_host(server,
2175 router->backup_replace_ip, 0)) {
2176 SILC_LOG_INFO(("Will not accept connections because we do "
2177 "not have backup router connection established"));
2178 silc_server_disconnect_remote(server, sock,
2179 SILC_STATUS_ERR_PERM_DENIED,
2180 "We do not have connection to backup "
2181 "router established, try later");
2182 server->stat.auth_failures++;
2184 /* From here on, wait 20 seconds for the backup router to appear. */
2185 silc_schedule_task_add_timeout(server->schedule,
2186 silc_server_backup_router_wait,
2187 (void *)server, 20, 0);
2192 SILC_LOG_DEBUG(("Remote host is client"));
2193 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2196 /* Add the client to the client ID cache. The nickname and Client ID
2197 and other information is created after we have received NEW_CLIENT
2198 packet from client. */
2199 client = silc_idlist_add_client(server->local_list,
2200 NULL, NULL, NULL, NULL, NULL, sock);
2202 SILC_LOG_ERROR(("Could not add new client to cache"));
2203 server->stat.auth_failures++;
2204 silc_server_disconnect_remote(server, sock,
2205 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2208 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2209 entry->data.conn_type = SILC_CONN_CLIENT;
2212 server->stat.my_clients++;
2213 server->stat.clients++;
2214 server->stat.cell_clients++;
2216 /* Get connection parameters */
2218 param = conn->param;
2220 if (!param->keepalive_secs)
2221 param->keepalive_secs = server->config->param.keepalive_secs;
2223 if (!param->qos && server->config->param.qos) {
2224 param->qos = server->config->param.qos;
2225 param->qos_rate_limit = server->config->param.qos_rate_limit;
2226 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2227 param->qos_limit_sec = server->config->param.qos_limit_sec;
2228 param->qos_limit_usec = server->config->param.qos_limit_usec;
2231 /* Check if to be anonymous connection */
2232 if (param->anonymous)
2233 client->mode |= SILC_UMODE_ANONYMOUS;
2236 /* Add public key to repository */
2237 SILC_LOG_DEBUG(("Add client public key to repository"));
2238 if (!silc_server_get_public_key_by_client(server, client, NULL))
2239 silc_skr_add_public_key_simple(server->repository,
2240 entry->data.public_key,
2241 SILC_SKR_USAGE_IDENTIFICATION, client,
2244 id_entry = (void *)client;
2248 case SILC_CONN_SERVER:
2249 case SILC_CONN_ROUTER:
2251 SilcServerEntry new_server;
2252 SilcBool initiator = FALSE;
2253 SilcBool backup_local = FALSE;
2254 SilcBool backup_router = FALSE;
2255 char *backup_replace_ip = NULL;
2256 SilcUInt16 backup_replace_port = 0;
2257 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2258 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2260 /* If we are backup router and this is incoming server connection
2261 and we do not have connection to primary router, do not allow
2263 if (server->server_type == SILC_BACKUP_ROUTER &&
2264 entry->conn_type == SILC_CONN_SERVER &&
2265 !SILC_PRIMARY_ROUTE(server)) {
2266 SILC_LOG_INFO(("Will not accept server connection because we do "
2267 "not have primary router connection established"));
2268 silc_server_disconnect_remote(server, sock,
2269 SILC_STATUS_ERR_PERM_DENIED,
2270 "We do not have connection to primary "
2271 "router established, try later");
2272 server->stat.auth_failures++;
2276 if (entry->conn_type == SILC_CONN_ROUTER) {
2277 /* Verify whether this connection is after all allowed to connect */
2278 if (!silc_server_connection_allowed(server, sock,
2280 &server->config->param,
2281 rconn ? rconn->param : NULL,
2282 silc_connauth_get_ske(connauth))) {
2283 server->stat.auth_failures++;
2289 param = rconn->param;
2291 if (!param->keepalive_secs)
2292 param->keepalive_secs = server->config->param.keepalive_secs;
2294 if (!param->qos && server->config->param.qos) {
2295 param->qos = server->config->param.qos;
2296 param->qos_rate_limit = server->config->param.qos_rate_limit;
2297 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2298 param->qos_limit_sec = server->config->param.qos_limit_sec;
2299 param->qos_limit_usec = server->config->param.qos_limit_usec;
2303 initiator = rconn->initiator;
2304 backup_local = rconn->backup_local;
2305 backup_router = rconn->backup_router;
2306 backup_replace_ip = rconn->backup_replace_ip;
2307 backup_replace_port = rconn->backup_replace_port;
2311 if (entry->conn_type == SILC_CONN_SERVER) {
2312 /* Verify whether this connection is after all allowed to connect */
2313 if (!silc_server_connection_allowed(server, sock,
2315 &server->config->param,
2316 srvconn ? srvconn->param : NULL,
2317 silc_connauth_get_ske(connauth))) {
2318 server->stat.auth_failures++;
2322 if (srvconn->param) {
2323 param = srvconn->param;
2325 if (!param->keepalive_secs)
2326 param->keepalive_secs = server->config->param.keepalive_secs;
2328 if (!param->qos && server->config->param.qos) {
2329 param->qos = server->config->param.qos;
2330 param->qos_rate_limit = server->config->param.qos_rate_limit;
2331 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2332 param->qos_limit_sec = server->config->param.qos_limit_sec;
2333 param->qos_limit_usec = server->config->param.qos_limit_usec;
2337 backup_router = srvconn->backup_router;
2341 /* If we are primary router and we have backup router configured
2342 but it has not connected to use yet, do not accept any other
2344 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2345 !server->backup_router && !backup_router) {
2346 SilcServerConfigRouter *router;
2347 router = silc_server_config_get_backup_router(server);
2348 if (router && strcmp(server->config->server_info->primary->server_ip,
2350 silc_server_find_socket_by_host(server,
2352 router->backup_replace_ip, 0)) {
2353 SILC_LOG_INFO(("Will not accept connections because we do "
2354 "not have backup router connection established"));
2355 silc_server_disconnect_remote(server, sock,
2356 SILC_STATUS_ERR_PERM_DENIED,
2357 "We do not have connection to backup "
2358 "router established, try later");
2359 server->stat.auth_failures++;
2361 /* From here on, wait 20 seconds for the backup router to appear. */
2362 silc_schedule_task_add_timeout(server->schedule,
2363 silc_server_backup_router_wait,
2364 (void *)server, 20, 0);
2369 SILC_LOG_DEBUG(("Remote host is %s",
2370 entry->conn_type == SILC_CONN_SERVER ?
2371 "server" : (backup_router ?
2372 "backup router" : "router")));
2373 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2374 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2375 "server" : (backup_router ?
2376 "backup router" : "router")));
2378 /* Add the server into server cache. The server name and Server ID
2379 is updated after we have received NEW_SERVER packet from the
2380 server. We mark ourselves as router for this server if we really
2383 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2384 server->local_list : (backup_router ?
2385 server->local_list :
2386 server->global_list)),
2388 (entry->conn_type == SILC_CONN_SERVER ?
2389 SILC_SERVER : SILC_ROUTER),
2391 (entry->conn_type == SILC_CONN_SERVER ?
2392 server->id_entry : (backup_router ?
2393 server->id_entry : NULL)),
2396 SILC_LOG_ERROR(("Could not add new server to cache"));
2397 silc_server_disconnect_remote(server, sock,
2398 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2399 server->stat.auth_failures++;
2402 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2403 entry->data.conn_type = entry->conn_type;
2405 id_entry = (void *)new_server;
2407 /* If the incoming connection is router and marked as backup router
2408 then add it to be one of our backups */
2409 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2410 /* Change it back to SERVER type since that's what it really is. */
2412 entry->data.conn_type = SILC_CONN_SERVER;
2413 new_server->server_type = SILC_BACKUP_ROUTER;
2415 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2416 ("Backup router %s is now online",
2419 /* Remove the backup waiting with timeout */
2420 silc_schedule_task_add_timeout(server->schedule,
2421 silc_server_backup_router_wait,
2422 (void *)server, 10, 0);
2426 if (entry->data.conn_type == SILC_CONN_SERVER) {
2427 server->stat.my_servers++;
2428 server->stat.servers++;
2429 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2431 server->stat.my_routers++;
2432 server->stat.routers++;
2433 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2436 /* Check whether this connection is to be our primary router connection
2437 if we do not already have the primary route. */
2438 if (!backup_router &&
2439 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2440 if (silc_server_config_is_primary_route(server) && !initiator)
2443 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2444 server->standalone = FALSE;
2445 if (!server->id_entry->router) {
2446 server->id_entry->router = id_entry;
2447 server->router = id_entry;
2459 /* Add connection to server->conns so that we know we have connection
2461 sconn = silc_calloc(1, sizeof(*sconn));
2462 sconn->server = server;
2464 sconn->remote_host = strdup(hostname);
2465 sconn->remote_port = port;
2466 silc_dlist_add(server->conns, sconn);
2467 idata->sconn = sconn;
2468 idata->last_receive = time(NULL);
2470 /* Add the common data structure to the ID entry. */
2471 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2472 silc_packet_set_context(sock, id_entry);
2474 /* Connection has been fully established now. Everything is ok. */
2475 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2477 /* Perform Quality of Service */
2479 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2480 param->qos_rate_limit, param->qos_bytes_limit,
2481 param->qos_limit_sec, param->qos_limit_usec);
2483 silc_server_config_unref(&entry->cconfig);
2484 silc_server_config_unref(&entry->sconfig);
2485 silc_server_config_unref(&entry->rconfig);
2489 silc_ske_free(silc_connauth_get_ske(connauth));
2490 silc_connauth_free(connauth);
2493 /* SKE completion callback. We set the new keys into use here. */
2496 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2497 SilcSKESecurityProperties prop,
2498 SilcSKEKeyMaterial keymat,
2499 SilcSKERekeyMaterial rekey,
2502 SilcPacketStream sock = context;
2503 SilcUnknownEntry entry = silc_packet_get_context(sock);
2504 SilcIDListData idata = (SilcIDListData)entry;
2505 SilcServer server = entry->server;
2506 SilcConnAuth connauth;
2507 SilcCipher send_key, receive_key;
2508 SilcHmac hmac_send, hmac_receive;
2515 if (status != SILC_SKE_STATUS_OK) {
2517 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2518 silc_ske_map_status(status), entry->hostname, entry->ip));
2520 silc_server_disconnect_remote(server, sock,
2521 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2525 SILC_LOG_DEBUG(("Setting keys into use"));
2527 /* Set the keys into use. The data will be encrypted after this. */
2528 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2529 &hmac_send, &hmac_receive, &hash)) {
2530 /* Error setting keys */
2532 silc_server_disconnect_remote(server, sock,
2533 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2536 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2537 hmac_receive, FALSE);
2539 idata->rekey = rekey;
2540 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2541 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2542 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2544 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2546 SILC_LOG_DEBUG(("Starting connection authentication"));
2547 server->stat.auth_attempts++;
2549 connauth = silc_connauth_alloc(server->schedule, ske,
2550 server->config->conn_auth_timeout);
2552 /** Error allocating auth protocol */
2554 silc_server_disconnect_remote(server, sock,
2555 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2559 /* Start connection authentication */
2561 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2562 silc_server_accept_auth_compl, sock);
2565 /* Accept new TCP connection */
2567 static void silc_server_accept_new_connection(SilcNetStatus status,
2571 SilcServer server = context;
2572 SilcPacketStream packet_stream;
2573 SilcServerConfigClient *cconfig = NULL;
2574 SilcServerConfigServer *sconfig = NULL;
2575 SilcServerConfigRouter *rconfig = NULL;
2576 SilcServerConfigDeny *deny;
2577 SilcUnknownEntry entry;
2579 SilcSKEParamsStruct params;
2580 char *hostname, *ip;
2583 SILC_LOG_DEBUG(("Accepting new connection"));
2585 /* Check for maximum allowed connections */
2586 server->stat.conn_attempts++;
2587 if (silc_dlist_count(server->conns) >
2588 server->config->param.connections_max) {
2589 SILC_LOG_ERROR(("Refusing connection, server is full"));
2590 server->stat.conn_failures++;
2591 silc_stream_destroy(stream);
2595 /* Get hostname, IP and port */
2596 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2597 (const char **)&ip, &port)) {
2598 /* Bad socket stream */
2599 server->stat.conn_failures++;
2600 silc_stream_destroy(stream);
2604 /* Create packet stream */
2605 packet_stream = silc_packet_stream_create(server->packet_engine,
2606 server->schedule, stream);
2607 if (!packet_stream) {
2608 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2609 server->stat.conn_failures++;
2610 silc_stream_destroy(stream);
2613 server->stat.conn_num++;
2615 /* Set source ID to packet stream */
2616 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2619 server->stat.conn_failures++;
2620 silc_packet_stream_destroy(packet_stream);
2624 /* Check whether this connection is denied to connect to us. */
2625 deny = silc_server_config_find_denied(server, ip);
2627 deny = silc_server_config_find_denied(server, hostname);
2629 /* The connection is denied */
2630 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2631 silc_server_disconnect_remote(server, packet_stream,
2632 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2637 /* Check whether we have configured this sort of connection at all. We
2638 have to check all configurations since we don't know what type of
2639 connection this is. */
2640 if (!(cconfig = silc_server_config_find_client(server, ip)))
2641 cconfig = silc_server_config_find_client(server, hostname);
2642 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2643 sconfig = silc_server_config_find_server_conn(server, hostname);
2644 if (server->server_type == SILC_ROUTER)
2645 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2646 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2647 if (!cconfig && !sconfig && !rconfig) {
2648 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2649 server->stat.conn_failures++;
2650 silc_server_disconnect_remote(server, packet_stream,
2651 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2655 /* The connection is allowed */
2656 entry = silc_calloc(1, sizeof(*entry));
2658 server->stat.conn_failures++;
2659 silc_server_disconnect_remote(server, packet_stream,
2660 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2663 entry->hostname = hostname;
2666 entry->server = server;
2667 entry->data.conn_type = SILC_CONN_UNKNOWN;
2668 silc_packet_set_context(packet_stream, entry);
2670 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2671 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2672 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2674 /* Take flags for key exchange. Since we do not know what type of connection
2675 this is, we go through all found configurations and use the global ones
2676 as well. This will result always into strictest key exchange flags. */
2677 memset(¶ms, 0, sizeof(params));
2678 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2679 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2680 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2681 if (server->config->param.key_exchange_pfs)
2682 params.flags |= SILC_SKE_SP_FLAG_PFS;
2684 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2685 server->stat.conn_attempts++;
2687 /* Start SILC Key Exchange protocol */
2688 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2689 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2690 server->public_key, server->private_key,
2693 server->stat.conn_failures++;
2694 silc_server_disconnect_remote(server, packet_stream,
2695 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2698 silc_ske_set_callbacks(ske, silc_server_verify_key,
2699 silc_server_accept_completed, packet_stream);
2701 /* Start key exchange protocol */
2702 params.version = silc_version_string;
2703 params.timeout_secs = server->config->key_exchange_timeout;
2704 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2708 /********************************** Rekey ***********************************/
2710 /* Initiator rekey completion callback */
2712 static void silc_server_rekey_completion(SilcSKE ske,
2713 SilcSKEStatus status,
2714 const SilcSKESecurityProperties prop,
2715 const SilcSKEKeyMaterial keymat,
2716 SilcSKERekeyMaterial rekey,
2719 SilcPacketStream sock = context;
2720 SilcIDListData idata = silc_packet_get_context(sock);
2721 SilcServer server = idata->sconn->server;
2723 idata->sconn->op = NULL;
2724 if (status != SILC_SKE_STATUS_OK) {
2725 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2726 idata->sconn->remote_host));
2730 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2731 idata->sconn->remote_host, idata->sconn->remote_port,
2732 SILC_CONNTYPE_STRING(idata->conn_type)));
2734 /* Save rekey data for next rekey */
2735 idata->rekey = rekey;
2737 /* Register new rekey timeout */
2738 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2739 sock, idata->sconn->rekey_timeout, 0);
2742 /* Rekey callback. Start rekey as initiator */
2744 SILC_TASK_CALLBACK(silc_server_do_rekey)
2746 SilcServer server = app_context;
2747 SilcPacketStream sock = context;
2748 SilcIDListData idata = silc_packet_get_context(sock);
2751 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2753 /* Do not execute rekey with disabled connections */
2754 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2757 /* If another protocol is active do not start rekey */
2758 if (idata->sconn->op) {
2759 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2760 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2765 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2766 idata->sconn->remote_host, idata->sconn->remote_port,
2767 SILC_CONNTYPE_STRING(idata->conn_type)));
2770 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2771 server->public_key, NULL, sock);
2775 /* Set SKE callbacks */
2776 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2779 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2782 /* Responder rekey completion callback */
2785 silc_server_rekey_resp_completion(SilcSKE ske,
2786 SilcSKEStatus status,
2787 const SilcSKESecurityProperties prop,
2788 const SilcSKEKeyMaterial keymat,
2789 SilcSKERekeyMaterial rekey,
2792 SilcPacketStream sock = context;
2793 SilcIDListData idata = silc_packet_get_context(sock);
2795 idata->sconn->op = NULL;
2796 if (status != SILC_SKE_STATUS_OK) {
2797 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2798 idata->sconn->remote_host));
2802 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2803 idata->sconn->remote_host, idata->sconn->remote_port,
2804 SILC_CONNTYPE_STRING(idata->conn_type)));
2806 /* Save rekey data for next rekey */
2807 idata->rekey = rekey;
2810 /* Start rekey as responder */
2812 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2815 SilcIDListData idata = silc_packet_get_context(sock);
2818 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2819 idata->sconn->remote_host, idata->sconn->remote_port,
2820 SILC_CONNTYPE_STRING(idata->conn_type)));
2823 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2824 server->public_key, NULL, sock);
2826 silc_packet_free(packet);
2830 /* Set SKE callbacks */
2831 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2834 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2839 /****************************** Disconnection *******************************/
2841 /* Destroys packet stream. */
2843 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2845 silc_packet_stream_destroy(context);
2848 /* Closes connection to socket connection */
2850 void silc_server_close_connection(SilcServer server,
2851 SilcPacketStream sock)
2853 SilcIDListData idata = silc_packet_get_context(sock);
2855 const char *hostname;
2858 memset(tmp, 0, sizeof(tmp));
2859 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2860 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2861 NULL, &hostname, NULL, &port);
2862 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2863 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2864 tmp[0] ? tmp : ""));
2866 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2868 if (idata && idata->sconn) {
2869 silc_server_connection_free(idata->sconn);
2870 idata->sconn = NULL;
2873 /* Close connection with timeout */
2874 server->stat.conn_num--;
2875 silc_schedule_task_del_by_all(server->schedule, 0,
2876 silc_server_close_connection_final, sock);
2877 silc_schedule_task_add_timeout(server->schedule,
2878 silc_server_close_connection_final,
2882 /* Sends disconnect message to remote connection and disconnects the
2885 void silc_server_disconnect_remote(SilcServer server,
2886 SilcPacketStream sock,
2887 SilcStatus status, ...)
2889 unsigned char buf[512];
2896 SILC_LOG_DEBUG(("Disconnecting remote host"));
2898 va_start(ap, status);
2899 cp = va_arg(ap, char *);
2901 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2904 /* Send SILC_PACKET_DISCONNECT */
2905 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2906 SILC_STR_UI_CHAR(status),
2907 SILC_STR_UI8_STRING(cp ? buf : NULL),
2910 /* Close connection */
2911 silc_server_close_connection(server, sock);
2914 /* Frees client data and notifies about client's signoff. */
2916 void silc_server_free_client_data(SilcServer server,
2917 SilcPacketStream sock,
2918 SilcClientEntry client,
2920 const char *signoff)
2922 SILC_LOG_DEBUG(("Freeing client %p data", client));
2925 /* Check if anyone is watching this nickname */
2926 if (server->server_type == SILC_ROUTER)
2927 silc_server_check_watcher_list(server, client, NULL,
2928 SILC_NOTIFY_TYPE_SIGNOFF);
2930 /* Send SIGNOFF notify to routers. */
2932 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2933 SILC_BROADCAST(server), client->id,
2937 /* Remove client from all channels */
2939 silc_server_remove_from_channels(server, NULL, client,
2940 TRUE, (char *)signoff, TRUE, FALSE);
2942 silc_server_remove_from_channels(server, NULL, client,
2943 FALSE, NULL, FALSE, FALSE);
2945 /* Remove this client from watcher list if it is */
2946 silc_server_del_from_watcher_list(server, client);
2948 /* Remove client's public key from repository, this will free it too. */
2949 if (client->data.public_key) {
2950 silc_skr_del_public_key(server->repository, client->data.public_key,
2952 client->data.public_key = NULL;
2955 /* Update statistics */
2956 server->stat.my_clients--;
2957 server->stat.clients--;
2958 if (server->stat.cell_clients)
2959 server->stat.cell_clients--;
2960 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2961 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2962 silc_schedule_task_del_by_context(server->schedule, client);
2964 if (client->data.sconn)
2965 silc_server_connection_free(client->data.sconn);
2967 /* We will not delete the client entry right away. We will take it
2968 into history (for WHOWAS command) for 5 minutes, unless we're
2969 shutting down server. */
2970 if (!server->server_shutdown) {
2971 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2973 client->router = NULL;
2974 client->connection = NULL;
2975 client->data.created = silc_time();
2976 silc_dlist_add(server->expired_clients, client);
2978 /* Delete directly since we're shutting down server */
2979 SILC_LOG_DEBUG(("Delete client directly"));
2980 silc_idlist_del_data(client);
2981 silc_idlist_del_client(server->local_list, client);
2985 /* Frees user_data pointer from socket connection object. This also sends
2986 appropriate notify packets to the network to inform about leaving
2989 void silc_server_free_sock_user_data(SilcServer server,
2990 SilcPacketStream sock,
2991 const char *signoff_message)
2993 SilcIDListData idata = silc_packet_get_context(sock);
2997 SILC_LOG_DEBUG(("Start"));
3002 silc_schedule_task_del_by_context(server->schedule, sock);
3004 /* Cancel active protocols */
3006 if (idata->sconn && idata->sconn->op) {
3007 SILC_LOG_DEBUG(("Abort active protocol"));
3008 silc_async_abort(idata->sconn->op, NULL, NULL);
3010 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3011 ((SilcUnknownEntry)idata)->op) {
3012 SILC_LOG_DEBUG(("Abort active protocol"));
3013 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3017 switch (idata->conn_type) {
3018 case SILC_CONN_CLIENT:
3020 SilcClientEntry client_entry = (SilcClientEntry)idata;
3021 silc_server_free_client_data(server, sock, client_entry, TRUE,
3023 silc_packet_set_context(sock, NULL);
3027 case SILC_CONN_SERVER:
3028 case SILC_CONN_ROUTER:
3030 SilcServerEntry user_data = (SilcServerEntry)idata;
3031 SilcServerEntry backup_router = NULL;
3033 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3036 backup_router = silc_server_backup_get(server, user_data->id);
3038 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3039 backup_router == server->id_entry &&
3040 idata->conn_type != SILC_CONN_ROUTER)
3041 backup_router = NULL;
3043 if (server->server_shutdown || server->backup_noswitch)
3044 backup_router = NULL;
3046 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3047 NULL, NULL, &ip, &port);
3049 /* If this was our primary router connection then we're lost to
3050 the outside world. */
3051 if (server->router == user_data) {
3052 /* Check whether we have a backup router connection */
3053 if (!backup_router || backup_router == user_data) {
3054 if (!server->no_reconnect)
3055 silc_server_create_connections(server);
3056 server->id_entry->router = NULL;
3057 server->router = NULL;
3058 server->standalone = TRUE;
3059 server->backup_primary = FALSE;
3060 backup_router = NULL;
3062 if (server->id_entry != backup_router) {
3063 SILC_LOG_INFO(("New primary router is backup router %s",
3064 backup_router->server_name));
3065 server->id_entry->router = backup_router;
3066 server->router = backup_router;
3067 server->router_connect = time(0);
3068 server->backup_primary = TRUE;
3069 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3071 /* Send START_USE to backup router to indicate we have switched */
3072 silc_server_backup_send_start_use(server,
3073 backup_router->connection,
3076 SILC_LOG_INFO(("We are now new primary router in this cell"));
3077 server->id_entry->router = NULL;
3078 server->router = NULL;
3079 server->standalone = TRUE;
3082 /* We stop here to take a breath */
3085 if (server->backup_router) {
3086 server->server_type = SILC_ROUTER;
3088 /* We'll need to constantly try to reconnect to the primary
3089 router so that we'll see when it comes back online. */
3090 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3091 silc_server_backup_connected,
3095 /* Mark this connection as replaced */
3096 silc_server_backup_replaced_add(server, user_data->id,
3099 } else if (backup_router) {
3100 SILC_LOG_INFO(("Enabling the use of backup router %s",
3101 backup_router->server_name));
3103 /* Mark this connection as replaced */
3104 silc_server_backup_replaced_add(server, user_data->id,
3106 } else if (server->server_type == SILC_SERVER &&
3107 idata->conn_type == SILC_CONN_ROUTER) {
3108 /* Reconnect to the router (backup) */
3109 if (!server->no_reconnect)
3110 silc_server_create_connections(server);
3113 if (user_data->server_name)
3114 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3115 ("Server %s signoff", user_data->server_name));
3117 if (!backup_router) {
3118 /* Remove all servers that are originated from this server, and
3119 remove the clients of those servers too. */
3120 silc_server_remove_servers_by_server(server, user_data, TRUE);
3123 /* Remove the clients that this server owns as they will become
3124 invalid now too. For backup router the server is actually
3125 coming from the primary router, so mark that as the owner
3127 if (server->server_type == SILC_BACKUP_ROUTER &&
3128 sock->type == SILC_CONN_SERVER)
3129 silc_server_remove_clients_by_server(server, server->router,
3133 silc_server_remove_clients_by_server(server, user_data,
3136 /* Remove channels owned by this server */
3137 if (server->server_type == SILC_SERVER)
3138 silc_server_remove_channels_by_server(server, user_data);
3140 /* Enable local server connections that may be disabled */
3141 silc_server_local_servers_toggle_enabled(server, TRUE);
3143 /* Update the client entries of this server to the new backup
3144 router. If we are the backup router we also resolve the real
3145 servers for the clients. After updating is over this also
3146 removes the clients that this server explicitly owns. */
3147 silc_server_update_clients_by_server(server, user_data,
3148 backup_router, TRUE);
3150 /* If we are router and just lost our primary router (now standlaone)
3151 we remove everything that was behind it, since we don't know
3153 if (server->server_type == SILC_ROUTER && server->standalone)
3154 /* Remove all servers that are originated from this server, and
3155 remove the clients of those servers too. */
3156 silc_server_remove_servers_by_server(server, user_data, TRUE);
3158 /* Finally remove the clients that are explicitly owned by this
3159 server. They go down with the server. */
3160 silc_server_remove_clients_by_server(server, user_data,
3163 /* Update our server cache to use the new backup router too. */
3164 silc_server_update_servers_by_server(server, user_data, backup_router);
3165 if (server->server_type == SILC_SERVER)
3166 silc_server_update_channels_by_server(server, user_data,
3169 /* Send notify about primary router going down to local operators */
3170 if (server->backup_router)
3171 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3172 SILC_NOTIFY_TYPE_NONE,
3173 ("%s switched to backup router %s "
3174 "(we are primary router now)",
3175 server->server_name, server->server_name));
3176 else if (server->router)
3177 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3178 SILC_NOTIFY_TYPE_NONE,
3179 ("%s switched to backup router %s",
3180 server->server_name,
3181 server->router->server_name));
3183 server->backup_noswitch = FALSE;
3186 silc_server_connection_free(idata->sconn);
3189 if (idata->conn_type == SILC_CONN_SERVER) {
3190 server->stat.my_servers--;
3191 server->stat.servers--;
3192 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3193 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3194 server->stat.my_routers--;
3195 server->stat.routers--;
3196 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3198 if (server->server_type == SILC_ROUTER)
3199 server->stat.cell_servers--;
3201 /* Free the server entry */
3202 silc_server_backup_del(server, user_data);
3203 silc_server_backup_replaced_del(server, user_data);
3204 silc_idlist_del_data(user_data);
3205 if (!silc_idlist_del_server(server->local_list, user_data))
3206 silc_idlist_del_server(server->global_list, user_data);
3208 if (backup_router && backup_router != server->id_entry) {
3209 /* Announce all of our stuff that was created about 5 minutes ago.
3210 The backup router knows all the other stuff already. */
3211 if (server->server_type == SILC_ROUTER)
3212 silc_server_announce_servers(server, FALSE, time(0) - 300,
3213 backup_router->connection);
3215 /* Announce our clients and channels to the router */
3216 silc_server_announce_clients(server, time(0) - 300,
3217 backup_router->connection);
3218 silc_server_announce_channels(server, time(0) - 300,
3219 backup_router->connection);
3222 silc_packet_set_context(sock, NULL);
3228 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3230 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3233 silc_server_connection_free(idata->sconn);
3234 silc_idlist_del_data(idata);
3236 silc_packet_set_context(sock, NULL);
3242 /* Removes client from all channels it has joined. This is used when client
3243 connection is disconnected. If the client on a channel is last, the
3244 channel is removed as well. This sends the SIGNOFF notify types. */
3246 void silc_server_remove_from_channels(SilcServer server,
3247 SilcPacketStream sock,
3248 SilcClientEntry client,
3250 const char *signoff_message,
3254 SilcChannelEntry channel;
3255 SilcChannelClientEntry chl;
3256 SilcHashTableList htl;
3257 SilcBuffer clidp = NULL;
3262 if (notify && !client->id)
3265 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3266 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3269 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3274 /* Remove the client from all channels. The client is removed from
3275 the channels' user list. */
3276 silc_hash_table_list(client->channels, &htl);
3277 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3278 channel = chl->channel;
3280 /* Remove channel if this is last client leaving the channel, unless
3281 the channel is permanent. */
3282 if (server->server_type != SILC_SERVER &&
3283 silc_hash_table_count(channel->user_list) < 2) {
3284 silc_server_channel_delete(server, channel);
3288 silc_hash_table_del(client->channels, channel);
3289 silc_hash_table_del(channel->user_list, client);
3290 channel->user_count--;
3292 /* If there is no global users on the channel anymore mark the channel
3293 as local channel. Do not check if the removed client is local client. */
3294 if (server->server_type == SILC_SERVER && channel->global_users &&
3295 chl->client->router && !silc_server_channel_has_global(channel))
3296 channel->global_users = FALSE;
3298 memset(chl, 'A', sizeof(*chl));
3301 /* Update statistics */
3302 if (SILC_IS_LOCAL(client))
3303 server->stat.my_chanclients--;
3304 if (server->server_type == SILC_ROUTER) {
3305 server->stat.cell_chanclients--;
3306 server->stat.chanclients--;
3309 /* If there is not at least one local user on the channel then we don't
3310 need the channel entry anymore, we can remove it safely, unless the
3311 channel is permanent channel */
3312 if (server->server_type == SILC_SERVER &&
3313 !silc_server_channel_has_local(channel)) {
3314 /* Notify about leaving client if this channel has global users. */
3315 if (notify && channel->global_users)
3316 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3317 SILC_NOTIFY_TYPE_SIGNOFF,
3318 signoff_message ? 2 : 1,
3319 clidp->data, silc_buffer_len(clidp),
3320 signoff_message, signoff_message ?
3321 strlen(signoff_message) : 0);
3323 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3324 silc_server_channel_delete(server, channel);
3328 /* Send notify to channel about client leaving SILC and channel too */
3330 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3331 SILC_NOTIFY_TYPE_SIGNOFF,
3332 signoff_message ? 2 : 1,
3333 clidp->data, silc_buffer_len(clidp),
3334 signoff_message, signoff_message ?
3335 strlen(signoff_message) : 0);
3337 if (killed && clidp) {
3338 /* Remove the client from channel's invite list */
3339 if (channel->invite_list &&
3340 silc_hash_table_count(channel->invite_list)) {
3342 SilcArgumentPayload iargs;
3343 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3344 silc_buffer_len(clidp), 3);
3345 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3346 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3347 silc_buffer_free(ab);
3348 silc_argument_payload_free(iargs);
3352 /* Don't create keys if we are shutting down */
3353 if (server->server_shutdown)
3356 /* Re-generate channel key if needed */
3357 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3358 if (!silc_server_create_channel_key(server, channel, 0))
3361 /* Send the channel key to the channel. The key of course is not sent
3362 to the client who was removed from the channel. */
3363 silc_server_send_channel_key(server, client->connection, channel,
3364 server->server_type == SILC_ROUTER ?
3365 FALSE : !server->standalone);
3369 silc_hash_table_list_reset(&htl);
3371 silc_buffer_free(clidp);
3374 /* Removes client from one channel. This is used for example when client
3375 calls LEAVE command to remove itself from the channel. Returns TRUE
3376 if channel still exists and FALSE if the channel is removed when
3377 last client leaves the channel. If `notify' is FALSE notify messages
3380 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3381 SilcPacketStream sock,
3382 SilcChannelEntry channel,
3383 SilcClientEntry client,
3386 SilcChannelClientEntry chl;
3389 SILC_LOG_DEBUG(("Removing %s from channel %s",
3390 silc_id_render(client->id, SILC_ID_CLIENT),
3391 channel->channel_name));
3393 /* Get the entry to the channel, if this client is not on the channel
3395 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3398 /* Remove channel if this is last client leaving the channel, unless
3399 the channel is permanent. */
3400 if (server->server_type != SILC_SERVER &&
3401 silc_hash_table_count(channel->user_list) < 2) {
3402 silc_server_channel_delete(server, channel);
3406 silc_hash_table_del(client->channels, channel);
3407 silc_hash_table_del(channel->user_list, client);
3408 channel->user_count--;
3410 /* If there is no global users on the channel anymore mark the channel
3411 as local channel. Do not check if the client is local client. */
3412 if (server->server_type == SILC_SERVER && channel->global_users &&
3413 chl->client->router && !silc_server_channel_has_global(channel))
3414 channel->global_users = FALSE;
3416 memset(chl, 'O', sizeof(*chl));
3419 /* Update statistics */
3420 if (SILC_IS_LOCAL(client))
3421 server->stat.my_chanclients--;
3422 if (server->server_type == SILC_ROUTER) {
3423 server->stat.cell_chanclients--;
3424 server->stat.chanclients--;
3427 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3431 /* If there is not at least one local user on the channel then we don't
3432 need the channel entry anymore, we can remove it safely, unless the
3433 channel is permanent channel */
3434 if (server->server_type == SILC_SERVER &&
3435 !silc_server_channel_has_local(channel)) {
3436 /* Notify about leaving client if this channel has global users. */
3437 if (notify && channel->global_users)
3438 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3439 SILC_NOTIFY_TYPE_LEAVE, 1,
3440 clidp->data, silc_buffer_len(clidp));
3442 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3443 silc_server_channel_delete(server, channel);
3444 silc_buffer_free(clidp);
3448 /* Send notify to channel about client leaving the channel */
3450 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3451 SILC_NOTIFY_TYPE_LEAVE, 1,
3452 clidp->data, silc_buffer_len(clidp));
3454 silc_buffer_free(clidp);
3458 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3459 function may be used only by router. In real SILC network all channels
3460 are created by routers thus this function is never used by normal
3463 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3464 SilcServerID *router_id,
3470 SilcChannelID *channel_id;
3471 SilcChannelEntry entry;
3472 SilcCipher send_key, receive_key;
3475 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3478 cipher = SILC_DEFAULT_CIPHER;
3480 hmac = SILC_DEFAULT_HMAC;
3482 /* Allocate cipher */
3483 if (!silc_cipher_alloc(cipher, &send_key))
3485 if (!silc_cipher_alloc(cipher, &receive_key)) {
3486 silc_cipher_free(send_key);
3491 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3492 silc_cipher_free(send_key);
3493 silc_cipher_free(receive_key);
3497 channel_name = strdup(channel_name);
3499 /* Create the channel ID */
3500 if (!silc_id_create_channel_id(server, router_id, server->rng,
3502 silc_free(channel_name);
3503 silc_cipher_free(send_key);
3504 silc_cipher_free(receive_key);
3505 silc_hmac_free(newhmac);
3509 /* Create the channel */
3510 entry = silc_idlist_add_channel(server->local_list, channel_name,
3511 SILC_CHANNEL_MODE_NONE, channel_id,
3512 NULL, send_key, receive_key, newhmac);
3514 silc_free(channel_name);
3515 silc_cipher_free(send_key);
3516 silc_cipher_free(receive_key);
3517 silc_hmac_free(newhmac);
3518 silc_free(channel_id);
3522 entry->cipher = strdup(cipher);
3523 entry->hmac_name = strdup(hmac);
3525 /* Now create the actual key material */
3526 if (!silc_server_create_channel_key(server, entry,
3527 silc_cipher_get_key_len(send_key) / 8)) {
3528 silc_idlist_del_channel(server->local_list, entry);
3532 /* Notify other routers about the new channel. We send the packet
3533 to our primary route. */
3535 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3536 channel_name, entry->id,
3537 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3540 /* Distribute to backup routers */
3541 if (broadcast && server->server_type == SILC_ROUTER) {
3543 unsigned char cid[32];
3544 SilcUInt32 name_len = strlen(channel_name);
3547 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3548 packet = silc_channel_payload_encode(channel_name, name_len,
3549 cid, id_len, entry->mode);
3550 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3551 packet->data, silc_buffer_len(packet), FALSE,
3553 silc_buffer_free(packet);
3556 server->stat.my_channels++;
3557 if (server->server_type == SILC_ROUTER) {
3558 server->stat.channels++;
3559 server->stat.cell_channels++;
3560 entry->users_resolved = TRUE;
3566 /* Same as above but creates the channel with Channel ID `channel_id. */
3569 silc_server_create_new_channel_with_id(SilcServer server,
3573 SilcChannelID *channel_id,
3576 SilcChannelEntry entry;
3577 SilcCipher send_key, receive_key;
3580 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3583 cipher = SILC_DEFAULT_CIPHER;
3585 hmac = SILC_DEFAULT_HMAC;
3587 /* Allocate cipher */
3588 if (!silc_cipher_alloc(cipher, &send_key))
3590 if (!silc_cipher_alloc(cipher, &receive_key)) {
3591 silc_cipher_free(send_key);
3596 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3597 silc_cipher_free(send_key);
3598 silc_cipher_free(receive_key);
3602 channel_name = strdup(channel_name);
3604 /* Create the channel */
3605 entry = silc_idlist_add_channel(server->local_list, channel_name,
3606 SILC_CHANNEL_MODE_NONE, channel_id,
3607 NULL, send_key, receive_key, newhmac);
3609 silc_cipher_free(send_key);
3610 silc_cipher_free(receive_key);
3611 silc_hmac_free(newhmac);
3612 silc_free(channel_name);
3616 /* Now create the actual key material */
3617 if (!silc_server_create_channel_key(server, entry,
3618 silc_cipher_get_key_len(send_key) / 8)) {
3619 silc_idlist_del_channel(server->local_list, entry);
3623 /* Notify other routers about the new channel. We send the packet
3624 to our primary route. */
3626 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3627 channel_name, entry->id,
3628 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3631 /* Distribute to backup routers */
3632 if (broadcast && server->server_type == SILC_ROUTER) {
3634 unsigned char cid[32];
3635 SilcUInt32 name_len = strlen(channel_name);
3638 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3639 packet = silc_channel_payload_encode(channel_name, name_len,
3640 cid, id_len, entry->mode);
3641 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3642 packet->data, silc_buffer_len(packet), FALSE,
3644 silc_buffer_free(packet);
3647 server->stat.my_channels++;
3648 if (server->server_type == SILC_ROUTER) {
3649 server->stat.channels++;
3650 server->stat.cell_channels++;
3651 entry->users_resolved = TRUE;
3657 /* Channel's key re-key timeout callback. */
3659 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3661 SilcServer server = app_context;
3662 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3666 /* Return now if we are shutting down */
3667 if (server->server_shutdown)
3670 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3673 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3676 /* Generates new channel key. This is used to create the initial channel key
3677 but also to re-generate new key for channel. If `key_len' is provided
3678 it is the bytes of the key length. */
3680 SilcBool silc_server_create_channel_key(SilcServer server,
3681 SilcChannelEntry channel,
3685 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3688 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3689 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3693 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3695 if (!channel->send_key)
3696 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3697 channel->send_key = NULL;
3700 if (!channel->receive_key)
3701 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3702 silc_cipher_free(channel->send_key);
3703 channel->send_key = channel->receive_key = NULL;
3709 else if (channel->key_len)
3710 len = channel->key_len / 8;
3712 len = silc_cipher_get_key_len(channel->send_key) / 8;
3714 /* Create channel key */
3715 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3718 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3719 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3721 /* Remove old key if exists */
3723 memset(channel->key, 0, channel->key_len / 8);
3724 silc_free(channel->key);
3728 channel->key_len = len * 8;
3729 channel->key = silc_memdup(channel_key, len);
3730 memset(channel_key, 0, sizeof(channel_key));
3732 /* Generate HMAC key from the channel key data and set it */
3734 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3735 memset(channel->key, 0, channel->key_len / 8);
3736 silc_free(channel->key);
3737 silc_cipher_free(channel->send_key);
3738 silc_cipher_free(channel->receive_key);
3739 channel->send_key = channel->receive_key = NULL;
3742 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3743 silc_hmac_set_key(channel->hmac, hash,
3744 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3745 memset(hash, 0, sizeof(hash));
3747 if (server->server_type == SILC_ROUTER) {
3748 if (!channel->rekey)
3749 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3750 channel->rekey->channel = channel;
3751 channel->rekey->key_len = key_len;
3752 if (channel->rekey->task)
3753 silc_schedule_task_del(server->schedule, channel->rekey->task);
3755 channel->rekey->task =
3756 silc_schedule_task_add_timeout(server->schedule,
3757 silc_server_channel_key_rekey,
3758 (void *)channel->rekey,
3759 server->config->channel_rekey_secs, 0);
3765 /* Saves the channel key found in the encoded `key_payload' buffer. This
3766 function is used when we receive Channel Key Payload and also when we're
3767 processing JOIN command reply. Returns entry to the channel. */
3769 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3770 SilcBuffer key_payload,
3771 SilcChannelEntry channel)
3773 SilcChannelKeyPayload payload = NULL;
3775 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3779 /* Decode channel key payload */
3780 payload = silc_channel_key_payload_parse(key_payload->data,
3781 silc_buffer_len(key_payload));
3783 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3788 /* Get the channel entry */
3791 /* Get channel ID */
3792 tmp = silc_channel_key_get_id(payload, &tmp_len);
3793 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3798 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3800 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3802 if (server->server_type == SILC_ROUTER)
3803 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3804 silc_id_render(&id, SILC_ID_CHANNEL)));
3810 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3812 tmp = silc_channel_key_get_key(payload, &tmp_len);
3818 cipher = silc_channel_key_get_cipher(payload, NULL);
3824 /* Remove old key if exists */
3826 memset(channel->key, 0, channel->key_len / 8);
3827 silc_free(channel->key);
3828 silc_cipher_free(channel->send_key);
3829 silc_cipher_free(channel->receive_key);
3832 /* Create new cipher */
3833 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3834 channel->send_key = NULL;
3838 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3839 silc_cipher_free(channel->send_key);
3840 channel->send_key = channel->receive_key = NULL;
3845 if (channel->cipher)
3846 silc_free(channel->cipher);
3847 channel->cipher = strdup(cipher);
3850 channel->key_len = tmp_len * 8;
3851 channel->key = silc_memdup(tmp, tmp_len);
3852 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3853 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3855 /* Generate HMAC key from the channel key data and set it */
3857 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3858 memset(channel->key, 0, channel->key_len / 8);
3859 silc_free(channel->key);
3860 silc_cipher_free(channel->send_key);
3861 silc_cipher_free(channel->receive_key);
3862 channel->send_key = channel->receive_key = NULL;
3865 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3866 silc_hmac_set_key(channel->hmac, hash,
3867 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3869 memset(hash, 0, sizeof(hash));
3870 memset(tmp, 0, tmp_len);
3872 if (server->server_type == SILC_ROUTER) {
3873 if (!channel->rekey)
3874 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3875 channel->rekey->channel = channel;
3876 if (channel->rekey->task)
3877 silc_schedule_task_del(server->schedule, channel->rekey->task);
3879 channel->rekey->task =
3880 silc_schedule_task_add_timeout(server->schedule,
3881 silc_server_channel_key_rekey,
3882 (void *)channel->rekey,
3883 server->config->channel_rekey_secs, 0);
3888 silc_channel_key_payload_free(payload);
3893 /* Returns assembled of all servers in the given ID list. The packet's
3894 form is dictated by the New ID payload. */
3896 static void silc_server_announce_get_servers(SilcServer server,
3897 SilcServerEntry remote,
3899 SilcBuffer *servers,
3900 unsigned long creation_time)
3903 SilcIDCacheEntry id_cache;
3904 SilcServerEntry entry;
3907 /* Go through all clients in the list */
3908 if (silc_idcache_get_all(id_list->servers, &list)) {
3909 silc_list_start(list);
3910 while ((id_cache = silc_list_get(list))) {
3911 entry = (SilcServerEntry)id_cache->context;
3913 /* Do not announce the one we've sending our announcements and
3914 do not announce ourself. Also check the creation time if it's
3916 if ((entry == remote) || (entry == server->id_entry) ||
3917 (creation_time && entry->data.created < creation_time))
3920 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3922 *servers = silc_buffer_realloc(*servers,
3924 silc_buffer_truelen((*servers)) +
3925 silc_buffer_len(idp) :
3926 silc_buffer_len(idp)));
3927 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3928 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
3929 silc_buffer_pull(*servers, silc_buffer_len(idp));
3930 silc_buffer_free(idp);
3936 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3942 p = silc_notify_payload_encode(notify, argc, ap);
3948 /* This function is used by router to announce existing servers to our
3949 primary router when we've connected to it. If `creation_time' is non-zero
3950 then only the servers that has been created after the `creation_time'
3951 will be announced. */
3953 void silc_server_announce_servers(SilcServer server, SilcBool global,
3954 unsigned long creation_time,
3955 SilcPacketStream remote)
3957 SilcBuffer servers = NULL;
3959 SILC_LOG_DEBUG(("Announcing servers"));
3961 /* Get servers in local list */
3962 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3963 server->local_list, &servers,
3967 /* Get servers in global list */
3968 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3969 server->global_list, &servers,
3973 silc_buffer_push(servers, servers->data - servers->head);
3974 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
3976 /* Send the packet */
3977 silc_server_packet_send(server, remote,
3978 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3979 servers->data, silc_buffer_len(servers));
3981 silc_buffer_free(servers);
3985 /* Returns assembled packet of all clients in the given ID list. The
3986 packet's form is dictated by the New ID Payload. */
3988 static void silc_server_announce_get_clients(SilcServer server,
3990 SilcBuffer *clients,
3992 unsigned long creation_time)
3995 SilcIDCacheEntry id_cache;
3996 SilcClientEntry client;
3999 unsigned char mode[4];
4001 /* Go through all clients in the list */
4002 if (silc_idcache_get_all(id_list->clients, &list)) {
4003 silc_list_start(list);
4004 while ((id_cache = silc_list_get(list))) {
4005 client = (SilcClientEntry)id_cache->context;
4007 if (creation_time && client->data.created < creation_time)
4009 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4011 if (!client->connection && !client->router)
4014 SILC_LOG_DEBUG(("Announce Client ID %s",
4015 silc_id_render(client->id, SILC_ID_CLIENT)));
4017 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4019 *clients = silc_buffer_realloc(*clients,
4021 silc_buffer_truelen((*clients)) +
4022 silc_buffer_len(idp) :
4023 silc_buffer_len(idp)));
4024 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4025 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4026 silc_buffer_pull(*clients, silc_buffer_len(idp));
4028 SILC_PUT32_MSB(client->mode, mode);
4030 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4031 2, idp->data, silc_buffer_len(idp),
4033 *umodes = silc_buffer_realloc(*umodes,
4035 silc_buffer_truelen((*umodes)) +
4036 silc_buffer_len(tmp) :
4037 silc_buffer_len(tmp)));
4038 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4039 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4040 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4041 silc_buffer_free(tmp);
4043 silc_buffer_free(idp);
4048 /* This function is used to announce our existing clients to our router
4049 when we've connected to it. If `creation_time' is non-zero then only
4050 the clients that has been created after the `creation_time' will be
4053 void silc_server_announce_clients(SilcServer server,
4054 unsigned long creation_time,
4055 SilcPacketStream remote)
4057 SilcBuffer clients = NULL;
4058 SilcBuffer umodes = NULL;
4060 SILC_LOG_DEBUG(("Announcing clients"));
4062 /* Get clients in local list */
4063 silc_server_announce_get_clients(server, server->local_list,
4064 &clients, &umodes, creation_time);
4066 /* As router we announce our global list as well */
4067 if (server->server_type == SILC_ROUTER)
4068 silc_server_announce_get_clients(server, server->global_list,
4069 &clients, &umodes, creation_time);
4072 silc_buffer_push(clients, clients->data - clients->head);
4073 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4075 /* Send the packet */
4076 silc_server_packet_send(server, remote,
4077 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4078 clients->data, silc_buffer_len(clients));
4080 silc_buffer_free(clients);
4084 silc_buffer_push(umodes, umodes->data - umodes->head);
4085 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4087 /* Send the packet */
4088 silc_server_packet_send(server, remote,
4089 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4090 umodes->data, silc_buffer_len(umodes));
4092 silc_buffer_free(umodes);
4096 /* Returns channel's topic for announcing it */
4098 void silc_server_announce_get_channel_topic(SilcServer server,
4099 SilcChannelEntry channel,
4104 if (channel->topic) {
4105 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4106 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4108 silc_buffer_len(chidp),
4110 strlen(channel->topic));
4111 silc_buffer_free(chidp);
4115 /* Returns channel's invite and ban lists */
4117 void silc_server_announce_get_inviteban(SilcServer server,
4118 SilcChannelEntry channel,
4122 SilcBuffer list, idp, idp2, tmp2;
4124 SilcHashTableList htl;
4125 const unsigned char a[1] = { 0x03 };
4127 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4129 /* Encode invite list */
4130 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4131 list = silc_buffer_alloc_size(2);
4132 type = silc_hash_table_count(channel->invite_list);
4133 SILC_PUT16_MSB(type, list->data);
4134 silc_hash_table_list(channel->invite_list, &htl);
4135 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4136 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4138 silc_hash_table_list_reset(&htl);
4140 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4142 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4143 idp->data, silc_buffer_len(idp),
4144 channel->channel_name,
4145 strlen(channel->channel_name),
4146 idp2->data, silc_buffer_len(idp2),
4148 list->data, silc_buffer_len(list));
4149 silc_buffer_free(idp2);
4150 silc_buffer_free(list);
4153 /* Encode ban list */
4154 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4155 list = silc_buffer_alloc_size(2);
4156 type = silc_hash_table_count(channel->ban_list);
4157 SILC_PUT16_MSB(type, list->data);
4158 silc_hash_table_list(channel->ban_list, &htl);
4159 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4160 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4162 silc_hash_table_list_reset(&htl);
4165 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4166 idp->data, silc_buffer_len(idp),
4168 list->data, silc_buffer_len(list));
4169 silc_buffer_free(list);
4172 silc_buffer_free(idp);
4175 /* Returns assembled packets for channel users of the `channel'. */
4177 void silc_server_announce_get_channel_users(SilcServer server,
4178 SilcChannelEntry channel,
4179 SilcBuffer *channel_modes,
4180 SilcBuffer *channel_users,
4181 SilcBuffer *channel_users_modes)
4183 SilcChannelClientEntry chl;
4184 SilcHashTableList htl;
4185 SilcBuffer chidp, clidp, csidp;
4186 SilcBuffer tmp, fkey = NULL, chpklist;
4188 unsigned char mode[4], ulimit[4];
4191 SILC_LOG_DEBUG(("Start"));
4193 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4194 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4195 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4198 SILC_PUT32_MSB(channel->mode, mode);
4199 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4200 SILC_PUT32_MSB(channel->user_limit, ulimit);
4201 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4202 if (channel->founder_key)
4203 fkey = silc_public_key_payload_encode(channel->founder_key);
4205 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4207 silc_buffer_len(csidp),
4210 hmac, hmac ? strlen(hmac) : 0,
4211 channel->passphrase,
4212 channel->passphrase ?
4213 strlen(channel->passphrase) : 0,
4214 fkey ? fkey->data : NULL,
4215 fkey ? silc_buffer_len(fkey) : 0,
4216 chpklist ? chpklist->data : NULL,
4218 silc_buffer_len(chpklist) : 0,
4220 SILC_CHANNEL_MODE_ULIMIT ?
4223 SILC_CHANNEL_MODE_ULIMIT ?
4224 sizeof(ulimit) : 0));
4225 len = silc_buffer_len(tmp);
4227 silc_buffer_realloc(*channel_modes,
4229 silc_buffer_truelen((*channel_modes)) + len : len));
4230 silc_buffer_pull_tail(*channel_modes,
4231 ((*channel_modes)->end -
4232 (*channel_modes)->data));
4233 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4234 silc_buffer_pull(*channel_modes, len);
4235 silc_buffer_free(tmp);
4236 silc_buffer_free(fkey);
4239 /* Now find all users on the channel */
4240 silc_hash_table_list(channel->user_list, &htl);
4241 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4242 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4244 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4248 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4250 silc_buffer_len(clidp),
4252 silc_buffer_len(chidp));
4253 len = silc_buffer_len(tmp);
4255 silc_buffer_realloc(*channel_users,
4257 silc_buffer_truelen((*channel_users)) + len : len));
4258 silc_buffer_pull_tail(*channel_users,
4259 ((*channel_users)->end -
4260 (*channel_users)->data));
4262 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4263 silc_buffer_pull(*channel_users, len);
4264 silc_buffer_free(tmp);
4266 /* CUMODE notify for mode change on the channel */
4267 SILC_PUT32_MSB(chl->mode, mode);
4268 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4269 fkey = silc_public_key_payload_encode(channel->founder_key);
4270 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4272 silc_buffer_len(csidp),
4275 silc_buffer_len(clidp),
4276 fkey ? fkey->data : NULL,
4277 fkey ? silc_buffer_len(fkey) : 0);
4278 len = silc_buffer_len(tmp);
4279 *channel_users_modes =
4280 silc_buffer_realloc(*channel_users_modes,
4281 (*channel_users_modes ?
4282 silc_buffer_truelen((*channel_users_modes)) +
4284 silc_buffer_pull_tail(*channel_users_modes,
4285 ((*channel_users_modes)->end -
4286 (*channel_users_modes)->data));
4288 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4289 silc_buffer_pull(*channel_users_modes, len);
4290 silc_buffer_free(tmp);
4291 silc_buffer_free(fkey);
4293 silc_buffer_free(clidp);
4295 silc_hash_table_list_reset(&htl);
4296 silc_buffer_free(chidp);
4297 silc_buffer_free(csidp);
4300 /* Returns assembled packets for all channels and users on those channels
4301 from the given ID List. The packets are in the form dictated by the
4302 New Channel and New Channel User payloads. */
4304 void silc_server_announce_get_channels(SilcServer server,
4306 SilcBuffer *channels,
4307 SilcBuffer **channel_modes,
4308 SilcBuffer *channel_users,
4309 SilcBuffer **channel_users_modes,
4310 SilcUInt32 *channel_users_modes_c,
4311 SilcBuffer **channel_topics,
4312 SilcBuffer **channel_invites,
4313 SilcBuffer **channel_bans,
4314 SilcChannelID ***channel_ids,
4315 unsigned long creation_time)
4318 SilcIDCacheEntry id_cache;
4319 SilcChannelEntry channel;
4320 unsigned char cid[32];
4322 SilcUInt16 name_len;
4324 int i = *channel_users_modes_c;
4327 SILC_LOG_DEBUG(("Start"));
4329 /* Go through all channels in the list */
4330 if (silc_idcache_get_all(id_list->channels, &list)) {
4331 silc_list_start(list);
4332 while ((id_cache = silc_list_get(list))) {
4333 channel = (SilcChannelEntry)id_cache->context;
4335 if (creation_time && channel->created < creation_time)
4340 SILC_LOG_DEBUG(("Announce Channel ID %s",
4341 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4343 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4344 name_len = strlen(channel->channel_name);
4347 len = 4 + name_len + id_len + 4;
4349 silc_buffer_realloc(*channels,
4351 silc_buffer_truelen((*channels)) +
4353 silc_buffer_pull_tail(*channels,
4354 ((*channels)->end - (*channels)->data));
4355 silc_buffer_format(*channels,
4356 SILC_STR_UI_SHORT(name_len),
4357 SILC_STR_UI_XNSTRING(channel->channel_name,
4359 SILC_STR_UI_SHORT(id_len),
4360 SILC_STR_UI_XNSTRING(cid, id_len),
4361 SILC_STR_UI_INT(channel->mode),
4363 silc_buffer_pull(*channels, len);
4366 if (creation_time && channel->updated < creation_time)
4372 /* Channel user modes */
4373 *channel_users_modes = silc_realloc(*channel_users_modes,
4374 sizeof(**channel_users_modes) *
4376 (*channel_users_modes)[i] = NULL;
4377 *channel_modes = silc_realloc(*channel_modes,
4378 sizeof(**channel_modes) * (i + 1));
4379 (*channel_modes)[i] = NULL;
4380 *channel_ids = silc_realloc(*channel_ids,
4381 sizeof(**channel_ids) * (i + 1));
4382 (*channel_ids)[i] = NULL;
4383 silc_server_announce_get_channel_users(server, channel,
4384 &(*channel_modes)[i],
4386 &(*channel_users_modes)[i]);
4387 (*channel_ids)[i] = channel->id;
4389 /* Channel's topic */
4390 *channel_topics = silc_realloc(*channel_topics,
4391 sizeof(**channel_topics) * (i + 1));
4392 (*channel_topics)[i] = NULL;
4393 silc_server_announce_get_channel_topic(server, channel,
4394 &(*channel_topics)[i]);
4396 /* Channel's invite and ban list */
4397 *channel_invites = silc_realloc(*channel_invites,
4398 sizeof(**channel_invites) * (i + 1));
4399 (*channel_invites)[i] = NULL;
4400 *channel_bans = silc_realloc(*channel_bans,
4401 sizeof(**channel_bans) * (i + 1));
4402 (*channel_bans)[i] = NULL;
4403 silc_server_announce_get_inviteban(server, channel,
4404 &(*channel_invites)[i],
4405 &(*channel_bans)[i]);
4407 (*channel_users_modes_c)++;
4415 /* This function is used to announce our existing channels to our router
4416 when we've connected to it. This also announces the users on the
4417 channels to the router. If the `creation_time' is non-zero only the
4418 channels that was created after the `creation_time' are announced.
4419 Note that the channel users are still announced even if the `creation_time'
4422 void silc_server_announce_channels(SilcServer server,
4423 unsigned long creation_time,
4424 SilcPacketStream remote)
4426 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4427 SilcBuffer *channel_users_modes = NULL;
4428 SilcBuffer *channel_topics = NULL;
4429 SilcBuffer *channel_invites = NULL;
4430 SilcBuffer *channel_bans = NULL;
4431 SilcUInt32 channel_users_modes_c = 0;
4432 SilcChannelID **channel_ids = NULL;
4434 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4436 /* Get channels and channel users in local list */
4437 silc_server_announce_get_channels(server, server->local_list,
4438 &channels, &channel_modes,
4440 &channel_users_modes,
4441 &channel_users_modes_c,
4445 &channel_ids, creation_time);
4447 /* Get channels and channel users in global list */
4448 if (server->server_type != SILC_SERVER)
4449 silc_server_announce_get_channels(server, server->global_list,
4450 &channels, &channel_modes,
4452 &channel_users_modes,
4453 &channel_users_modes_c,
4457 &channel_ids, creation_time);
4460 silc_buffer_push(channels, channels->data - channels->head);
4461 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4463 /* Send the packet */
4464 silc_server_packet_send(server, remote,
4465 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4466 channels->data, silc_buffer_len(channels));
4468 silc_buffer_free(channels);
4471 if (channel_users) {
4472 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4473 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4474 silc_buffer_len(channel_users));
4476 /* Send the packet */
4477 silc_server_packet_send(server, remote,
4478 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4479 channel_users->data, silc_buffer_len(channel_users));
4481 silc_buffer_free(channel_users);
4484 if (channel_modes) {
4487 for (i = 0; i < channel_users_modes_c; i++) {
4488 if (!channel_modes[i])
4490 silc_buffer_push(channel_modes[i],
4491 channel_modes[i]->data -
4492 channel_modes[i]->head);
4493 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4494 silc_buffer_len(channel_modes[i]));
4495 silc_server_packet_send_dest(server, remote,
4496 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4497 channel_ids[i], SILC_ID_CHANNEL,
4498 channel_modes[i]->data,
4499 silc_buffer_len(channel_modes[i]));
4500 silc_buffer_free(channel_modes[i]);
4502 silc_free(channel_modes);
4505 if (channel_users_modes) {
4508 for (i = 0; i < channel_users_modes_c; i++) {
4509 if (!channel_users_modes[i])
4511 silc_buffer_push(channel_users_modes[i],
4512 channel_users_modes[i]->data -
4513 channel_users_modes[i]->head);
4514 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4515 silc_buffer_len(channel_users_modes[i]));
4516 silc_server_packet_send_dest(server, remote,
4517 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4518 channel_ids[i], SILC_ID_CHANNEL,
4519 channel_users_modes[i]->data,
4520 silc_buffer_len(channel_users_modes[i]));
4521 silc_buffer_free(channel_users_modes[i]);
4523 silc_free(channel_users_modes);
4526 if (channel_topics) {
4529 for (i = 0; i < channel_users_modes_c; i++) {
4530 if (!channel_topics[i])
4533 silc_buffer_push(channel_topics[i],
4534 channel_topics[i]->data -
4535 channel_topics[i]->head);
4536 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4537 silc_buffer_len(channel_topics[i]));
4538 silc_server_packet_send_dest(server, remote,
4539 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4540 channel_ids[i], SILC_ID_CHANNEL,
4541 channel_topics[i]->data,
4542 silc_buffer_len(channel_topics[i]));
4543 silc_buffer_free(channel_topics[i]);
4545 silc_free(channel_topics);
4548 if (channel_invites) {
4551 for (i = 0; i < channel_users_modes_c; i++) {
4552 if (!channel_invites[i])
4555 silc_buffer_push(channel_invites[i],
4556 channel_invites[i]->data -
4557 channel_invites[i]->head);
4558 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4559 silc_buffer_len(channel_invites[i]));
4560 silc_server_packet_send_dest(server, remote,
4561 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4562 channel_ids[i], SILC_ID_CHANNEL,
4563 channel_invites[i]->data,
4564 silc_buffer_len(channel_invites[i]));
4565 silc_buffer_free(channel_invites[i]);
4567 silc_free(channel_invites);
4573 for (i = 0; i < channel_users_modes_c; i++) {
4574 if (!channel_bans[i])
4577 silc_buffer_push(channel_bans[i],
4578 channel_bans[i]->data -
4579 channel_bans[i]->head);
4580 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4581 silc_buffer_len(channel_bans[i]));
4582 silc_server_packet_send_dest(server, remote,
4583 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4584 channel_ids[i], SILC_ID_CHANNEL,
4585 channel_bans[i]->data,
4586 silc_buffer_len(channel_bans[i]));
4587 silc_buffer_free(channel_bans[i]);
4589 silc_free(channel_bans);
4592 silc_free(channel_ids);
4595 /* Announces WATCH list. */
4597 void silc_server_announce_watches(SilcServer server,
4598 SilcPacketStream remote)
4600 SilcHashTableList htl;
4601 SilcBuffer buffer, idp, args, pkp;
4602 SilcClientEntry client;
4605 SILC_LOG_DEBUG(("Announcing watch list"));
4607 /* XXX because way we save the nicks (hash) we cannot announce them. */
4609 /* XXX we should send all public keys in one command if client is
4610 watching more than one key */
4611 silc_hash_table_list(server->watcher_list_pk, &htl);
4612 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4613 if (!client || !client->id)
4616 server->stat.commands_sent++;
4618 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4619 args = silc_buffer_alloc_size(2);
4620 silc_buffer_format(args,
4621 SILC_STR_UI_SHORT(1),
4623 pkp = silc_public_key_payload_encode(key);
4624 args = silc_argument_payload_encode_one(args, pkp->data,
4625 silc_buffer_len(pkp), 0x00);
4626 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4627 ++server->cmd_ident, 2,
4628 1, idp->data, silc_buffer_len(idp),
4630 silc_buffer_len(args));
4633 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4634 buffer->data, silc_buffer_len(buffer));
4636 silc_buffer_free(pkp);
4637 silc_buffer_free(args);
4638 silc_buffer_free(idp);
4639 silc_buffer_free(buffer);
4641 silc_hash_table_list_reset(&htl);
4644 /* Assembles user list and users mode list from the `channel'. */
4646 SilcBool silc_server_get_users_on_channel(SilcServer server,
4647 SilcChannelEntry channel,
4648 SilcBuffer *user_list,
4649 SilcBuffer *mode_list,
4650 SilcUInt32 *user_count)
4652 SilcChannelClientEntry chl;
4653 SilcHashTableList htl;
4654 SilcBuffer client_id_list;
4655 SilcBuffer client_mode_list;
4657 SilcUInt32 list_count = 0, len = 0;
4659 if (!silc_hash_table_count(channel->user_list))
4662 silc_hash_table_list(channel->user_list, &htl);
4663 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4664 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4665 silc_hash_table_list_reset(&htl);
4667 client_id_list = silc_buffer_alloc(len);
4669 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4670 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4671 silc_buffer_pull_tail(client_mode_list,
4672 silc_buffer_truelen(client_mode_list));
4674 silc_hash_table_list(channel->user_list, &htl);
4675 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4677 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4678 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4679 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4680 silc_buffer_free(idp);
4682 /* Client's mode on channel */
4683 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4684 silc_buffer_pull(client_mode_list, 4);
4688 silc_hash_table_list_reset(&htl);
4689 silc_buffer_push(client_id_list,
4690 client_id_list->data - client_id_list->head);
4691 silc_buffer_push(client_mode_list,
4692 client_mode_list->data - client_mode_list->head);
4694 *user_list = client_id_list;
4695 *mode_list = client_mode_list;
4696 *user_count = list_count;
4700 /* Saves users and their modes to the `channel'. */
4702 void silc_server_save_users_on_channel(SilcServer server,
4703 SilcPacketStream sock,
4704 SilcChannelEntry channel,
4705 SilcClientID *noadd,
4706 SilcBuffer user_list,
4707 SilcBuffer mode_list,
4708 SilcUInt32 user_count)
4714 SilcClientEntry client;
4715 SilcIDCacheEntry cache;
4716 SilcChannelClientEntry chl;
4718 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4719 channel->channel_name));
4721 for (i = 0; i < user_count; i++) {
4723 SILC_GET16_MSB(idp_len, user_list->data + 2);
4725 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4727 silc_buffer_pull(user_list, idp_len);
4730 SILC_GET32_MSB(mode, mode_list->data);
4731 silc_buffer_pull(mode_list, 4);
4733 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4738 /* Check if we have this client cached already. */
4739 client = silc_idlist_find_client_by_id(server->local_list,
4741 server->server_type, &cache);
4743 client = silc_idlist_find_client_by_id(server->global_list,
4745 server->server_type, &cache);
4747 /* If router did not find such Client ID in its lists then this must
4748 be bogus client or some router in the net is buggy. */
4749 if (server->server_type != SILC_SERVER)
4752 /* We don't have that client anywhere, add it. The client is added
4753 to global list since server didn't have it in the lists so it must be
4755 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4756 silc_id_dup(&id.u.client_id,
4758 silc_packet_get_context(sock),
4761 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4765 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4768 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4769 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4770 "%s", channel->channel_name));
4774 if (!silc_server_client_on_channel(client, channel, &chl)) {
4775 /* Client was not on the channel, add it. */
4776 chl = silc_calloc(1, sizeof(*chl));
4777 chl->client = client;
4779 chl->channel = channel;
4780 silc_hash_table_add(channel->user_list, chl->client, chl);
4781 silc_hash_table_add(client->channels, chl->channel, chl);
4782 channel->user_count++;
4790 /* Saves channels and channels user modes to the `client'. Removes
4791 the client from those channels that are not sent in the list but
4794 void silc_server_save_user_channels(SilcServer server,
4795 SilcPacketStream sock,
4796 SilcClientEntry client,
4797 SilcBuffer channels,
4798 SilcBuffer channels_user_modes)
4801 SilcUInt32 *chumodes;
4802 SilcChannelPayload entry;
4803 SilcChannelEntry channel;
4804 SilcChannelID channel_id;
4805 SilcChannelClientEntry chl;
4806 SilcHashTable ht = NULL;
4807 SilcHashTableList htl;
4811 if (!channels || !channels_user_modes ||
4812 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4815 ch = silc_channel_payload_parse_list(channels->data,
4816 silc_buffer_len(channels));
4817 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4819 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4820 NULL, NULL, NULL, TRUE);
4821 silc_dlist_start(ch);
4822 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4823 /* Check if we have this channel, and add it if we don't have it.
4824 Also add the client on the channel unless it is there already. */
4825 if (!silc_channel_get_id_parse(entry, &channel_id))
4827 channel = silc_idlist_find_channel_by_id(server->local_list,
4830 channel = silc_idlist_find_channel_by_id(server->global_list,
4833 if (server->server_type != SILC_SERVER) {
4838 /* We don't have that channel anywhere, add it. */
4839 name = silc_channel_get_name(entry, NULL);
4840 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4841 silc_id_dup(&channel_id,
4843 server->router, NULL, NULL, 0);
4850 channel->mode = silc_channel_get_mode(entry);
4852 /* Add the client on the channel */
4853 if (!silc_server_client_on_channel(client, channel, &chl)) {
4854 chl = silc_calloc(1, sizeof(*chl));
4855 chl->client = client;
4856 chl->mode = chumodes[i++];
4857 chl->channel = channel;
4858 silc_hash_table_add(channel->user_list, chl->client, chl);
4859 silc_hash_table_add(client->channels, chl->channel, chl);
4860 channel->user_count++;
4863 chl->mode = chumodes[i++];
4866 silc_hash_table_add(ht, channel, channel);
4868 silc_channel_payload_list_free(ch);
4869 silc_free(chumodes);
4873 /* Go through the list again and remove client from channels that
4874 are no part of the list. */
4876 silc_hash_table_list(client->channels, &htl);
4877 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4878 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4879 silc_hash_table_del(chl->channel->user_list, chl->client);
4880 silc_hash_table_del(chl->client->channels, chl->channel);
4884 silc_hash_table_list_reset(&htl);
4885 silc_hash_table_free(ht);
4887 silc_hash_table_list(client->channels, &htl);
4888 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4889 silc_hash_table_del(chl->channel->user_list, chl->client);
4890 silc_hash_table_del(chl->client->channels, chl->channel);
4893 silc_hash_table_list_reset(&htl);
4897 /* Lookups route to the client indicated by the `id_data'. The connection
4898 object and internal data object is returned. Returns NULL if route
4899 could not be found to the client. If the `client_id' is specified then
4900 it is used and the `id_data' is ignored. */
4903 silc_server_get_client_route(SilcServer server,
4904 unsigned char *id_data,
4906 SilcClientID *client_id,
4907 SilcIDListData *idata,
4908 SilcClientEntry *client_entry)
4910 SilcClientID *id, clid;
4911 SilcClientEntry client;
4913 SILC_LOG_DEBUG(("Start"));
4916 *client_entry = NULL;
4918 /* Decode destination Client ID */
4920 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
4922 id = silc_id_dup(&clid, SILC_ID_CLIENT);
4924 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4927 /* If the destination belongs to our server we don't have to route
4928 the packet anywhere but to send it to the local destination. */
4929 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4933 /* If we are router and the client has router then the client is in
4934 our cell but not directly connected to us. */
4935 if (server->server_type == SILC_ROUTER && client->router) {
4936 /* We are of course in this case the client's router thus the route
4937 to the client is the server who owns the client. So, we will send
4938 the packet to that server. */
4940 *idata = (SilcIDListData)client->router;
4941 return client->router->connection;
4944 /* Seems that client really is directly connected to us */
4946 *idata = (SilcIDListData)client;
4948 *client_entry = client;
4949 return client->connection;
4952 /* Destination belongs to someone not in this server. If we are normal
4953 server our action is to send the packet to our router. */
4954 if (server->server_type != SILC_ROUTER && !server->standalone) {
4957 *idata = (SilcIDListData)server->router;
4958 return SILC_PRIMARY_ROUTE(server);
4961 /* We are router and we will perform route lookup for the destination
4962 and send the packet to fastest route. */
4963 if (server->server_type == SILC_ROUTER && !server->standalone) {
4964 /* Check first that the ID is valid */
4965 client = silc_idlist_find_client_by_id(server->global_list, id,
4968 SilcPacketStream dst_sock;
4970 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4973 if (idata && dst_sock)
4974 *idata = silc_packet_get_context(dst_sock);
4983 /* Encodes and returns channel list of channels the `client' has joined.
4984 Secret channels are not put to the list. */
4986 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4987 SilcClientEntry client,
4988 SilcBool get_private,
4989 SilcBool get_secret,
4990 SilcBuffer *user_mode_list)
4992 SilcBuffer buffer = NULL;
4993 SilcChannelEntry channel;
4994 SilcChannelClientEntry chl;
4995 SilcHashTableList htl;
4996 unsigned char cid[32];
4998 SilcUInt16 name_len;
5002 *user_mode_list = NULL;
5004 silc_hash_table_list(client->channels, &htl);
5005 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5006 channel = chl->channel;
5008 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5010 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5013 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5014 name_len = strlen(channel->channel_name);
5016 len = 4 + name_len + id_len + 4;
5017 buffer = silc_buffer_realloc(buffer,
5019 silc_buffer_truelen(buffer) + len : len));
5020 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5021 silc_buffer_format(buffer,
5022 SILC_STR_UI_SHORT(name_len),
5023 SILC_STR_DATA(channel->channel_name, name_len),
5024 SILC_STR_UI_SHORT(id_len),
5025 SILC_STR_DATA(cid, id_len),
5026 SILC_STR_UI_INT(chl->channel->mode),
5028 silc_buffer_pull(buffer, len);
5030 if (user_mode_list) {
5032 silc_buffer_realloc(*user_mode_list,
5034 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5035 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5036 (*user_mode_list)->data));
5037 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5038 silc_buffer_pull(*user_mode_list, 4);
5041 silc_hash_table_list_reset(&htl);
5044 silc_buffer_push(buffer, buffer->data - buffer->head);
5045 if (user_mode_list && *user_mode_list)
5046 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5047 (*user_mode_list)->head));
5052 /* Task callback used to retrieve network statistical information from
5053 router server once in a while. */
5055 SILC_TASK_CALLBACK(silc_server_get_stats)
5057 SilcServer server = (SilcServer)context;
5058 SilcBuffer idp, packet;
5060 if (!server->standalone) {
5061 SILC_LOG_DEBUG(("Retrieving stats from router"));
5062 server->stat.commands_sent++;
5063 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5065 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5066 ++server->cmd_ident, 1,
5068 silc_buffer_len(idp));
5069 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5070 SILC_PACKET_COMMAND, 0, packet->data,
5071 silc_buffer_len(packet));
5072 silc_buffer_free(packet);
5073 silc_buffer_free(idp);
5077 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,