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, NEW_SERVER and RESUME_CLIENT are accepted only without
112 source ID and for unregistered connection. */
113 if (packet->src_id && (packet->type == SILC_PACKET_NEW_CLIENT ||
114 packet->type == SILC_PACKET_NEW_SERVER ||
115 packet->type == SILC_PACKET_RESUME_CLIENT) &&
116 (idata->status & SILC_IDLIST_STATUS_REGISTERED))
119 /* Ignore packets from disabled connection */
120 if (idata->status & SILC_IDLIST_STATUS_DISABLED &&
121 packet->type != SILC_PACKET_HEARTBEAT &&
122 packet->type != SILC_PACKET_RESUME_ROUTER &&
123 packet->type != SILC_PACKET_REKEY)
126 /* Check that the the current client ID is same as in the client's packet. */
127 if (idata->conn_type == SILC_CONN_CLIENT) {
128 SilcClientEntry client = (SilcClientEntry)silc_packet_get_context(stream);
129 SilcClientID client_id;
131 if (client->id && packet->src_id &&
132 silc_id_str2id(packet->src_id, packet->src_id_len,
133 packet->src_id_type, &client_id, sizeof(client_id))) {
134 if (!SILC_ID_CLIENT_COMPARE(client->id, &client_id)) {
135 SILC_LOG_DEBUG(("Packet source is not same as sender, packet %s",
136 silc_get_packet_name(packet->type)));
142 if (server->server_type == SILC_ROUTER) {
143 /* Route the packet if it is not destined to us. Other ID types but
144 server are handled separately after processing them. */
145 if (packet->dst_id &&
146 !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
147 packet->dst_id_type == SILC_ID_SERVER &&
148 idata->conn_type != SILC_CONN_CLIENT &&
149 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
150 SilcPacketStream conn;
151 SilcServerID server_id;
153 silc_id_str2id(packet->dst_id, packet->dst_id_len, packet->dst_id_type,
154 &server_id, sizeof(server_id));
156 conn = silc_server_route_get(server, &server_id, SILC_ID_SERVER);
158 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
159 silc_id_render(&server_id, SILC_ID_SERVER)));
163 silc_server_packet_route(server, conn, packet);
164 silc_packet_free(packet);
169 /* Broadcast packet if it is marked as broadcast packet and it is
170 originated from router and we are router. */
171 if (server->server_type == SILC_ROUTER &&
172 idata->conn_type == SILC_CONN_ROUTER &&
173 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
174 /* Broadcast to our primary route */
175 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
177 /* If we have backup routers then we need to feed all broadcast
178 data to those servers. */
179 silc_server_backup_broadcast(server, stream, packet);
183 silc_server_packet_parse_type(server, stream, packet);
188 /* Packet engine callback to indicate end of stream */
190 static void silc_server_packet_eos(SilcPacketEngine engine,
191 SilcPacketStream stream,
192 void *callback_context,
193 void *stream_context)
195 SilcServer server = callback_context;
196 SilcIDListData idata = silc_packet_get_context(stream);
198 SILC_LOG_DEBUG(("End of stream received"));
203 if (server->router_conn && server->router_conn->sock == stream &&
204 !server->router && server->standalone) {
205 silc_server_create_connections(server);
207 /* If backup disconnected then mark that resuming will not be allowed */
208 if (server->server_type == SILC_ROUTER && !server->backup_router &&
209 idata->conn_type == SILC_CONN_SERVER) {
210 SilcServerEntry server_entry = (SilcServerEntry)idata;
211 if (server_entry->server_type == SILC_BACKUP_ROUTER)
212 server->backup_closed = TRUE;
215 silc_server_free_sock_user_data(server, stream, NULL);
218 silc_server_close_connection(server, stream);
221 SILC_TASK_CALLBACK(silc_server_packet_error_timeout)
223 SilcServer server = app_context;
224 SilcPacketStream stream = context;
225 SilcIDListData idata = silc_packet_get_context(stream);
230 if (server->router_conn && server->router_conn->sock == stream &&
231 !server->router && server->standalone) {
232 silc_server_create_connections(server);
234 /* If backup disconnected then mark that resuming will not be allowed */
235 if (server->server_type == SILC_ROUTER && !server->backup_router &&
236 idata->conn_type == SILC_CONN_SERVER) {
237 SilcServerEntry server_entry = (SilcServerEntry)idata;
238 if (server_entry->server_type == SILC_BACKUP_ROUTER)
239 server->backup_closed = TRUE;
242 silc_server_free_sock_user_data(server, stream, NULL);
245 silc_server_close_connection(server, stream);
248 /* Packet engine callback to indicate error */
250 static void silc_server_packet_error(SilcPacketEngine engine,
251 SilcPacketStream stream,
252 SilcPacketError error,
253 void *callback_context,
254 void *stream_context)
256 SilcServer server = callback_context;
257 SilcIDListData idata = silc_packet_get_context(stream);
258 SilcStream sock = silc_packet_stream_get_stream(stream);
265 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
268 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
269 SILC_CONNTYPE_STRING(idata->conn_type),
270 silc_packet_error_string(error)));
272 silc_schedule_task_add_timeout(server->schedule,
273 silc_server_packet_error_timeout,
277 /* Packet stream callbacks */
278 static SilcPacketCallbacks silc_server_stream_cbs =
280 silc_server_packet_receive,
281 silc_server_packet_eos,
282 silc_server_packet_error
285 /* Parses the packet type and calls what ever routines the packet type
286 requires. This is done for all incoming packets. */
288 static void silc_server_packet_parse_type(SilcServer server,
289 SilcPacketStream sock,
292 SilcPacketType type = packet->type;
293 SilcIDListData idata = silc_packet_get_context(sock);
295 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
296 silc_get_packet_name(type), packet->flags));
298 /* Parse the packet type */
300 case SILC_PACKET_NOTIFY:
302 * Received notify packet. Server can receive notify packets from
303 * router. Server then relays the notify messages to clients if needed.
305 if (packet->flags & SILC_PACKET_FLAG_LIST)
306 silc_server_notify_list(server, sock, packet);
308 silc_server_notify(server, sock, packet);
312 * Private Message packets
314 case SILC_PACKET_PRIVATE_MESSAGE:
316 * Received private message packet. The packet is coming from either
319 if (packet->flags & SILC_PACKET_FLAG_LIST)
321 idata->last_receive = time(NULL);
322 silc_server_private_message(server, sock, packet);
328 case SILC_PACKET_CHANNEL_MESSAGE:
330 * Received channel message. Channel messages are special packets
331 * (although probably most common ones) thus they are handled
334 if (packet->flags & SILC_PACKET_FLAG_LIST)
336 idata->last_receive = time(NULL);
337 silc_server_channel_message(server, sock, packet);
343 case SILC_PACKET_COMMAND:
345 * Recived command. Processes the command request and allocates the
346 * command context and calls the command.
348 if (packet->flags & SILC_PACKET_FLAG_LIST)
350 server->stat.commands_received++;
351 silc_server_command_process(server, sock, packet);
354 case SILC_PACKET_COMMAND_REPLY:
356 * Received command reply packet. Received command reply to command. It
357 * may be reply to command sent by us or reply to command sent by client
358 * that we've routed further.
360 if (packet->flags & SILC_PACKET_FLAG_LIST)
362 server->stat.commands_received++;
363 silc_server_command_reply(server, sock, packet);
366 case SILC_PACKET_DISCONNECT:
369 char *message = NULL;
370 const char *hostname, *ip;
372 if (packet->flags & SILC_PACKET_FLAG_LIST)
374 if (silc_buffer_len(&packet->buffer) < 1)
377 status = (SilcStatus)packet->buffer.data[0];
378 if (silc_buffer_len(&packet->buffer) > 1 &&
379 silc_utf8_valid(packet->buffer.data + 1,
380 silc_buffer_len(&packet->buffer) - 1))
381 message = silc_memdup(packet->buffer.data + 1,
382 silc_buffer_len(&packet->buffer) - 1);
384 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
385 NULL, &hostname, &ip, NULL))
388 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
389 silc_get_status_message(status), status,
390 message ? message : ""));
394 /* Do not switch to backup in case of error */
395 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
397 /* If backup disconnected then mark that resuming will not be allowed */
398 if (server->server_type == SILC_ROUTER && !server->backup_router &&
399 idata->conn_type == SILC_CONN_SERVER) {
400 SilcServerEntry server_entry = (SilcServerEntry)idata;
401 if (server_entry->server_type == SILC_BACKUP_ROUTER)
402 server->backup_closed = TRUE;
405 /* Handle the disconnection from our end too */
406 if (SILC_IS_LOCAL(idata))
407 silc_server_free_sock_user_data(server, sock, NULL);
408 silc_server_close_connection(server, sock);
409 server->backup_noswitch = FALSE;
413 case SILC_PACKET_CHANNEL_KEY:
415 * Received key for channel. As channels are created by the router
416 * the keys are as well. We will distribute the key to all of our
417 * locally connected clients on the particular channel. Router
418 * never receives this channel and thus is ignored.
420 if (packet->flags & SILC_PACKET_FLAG_LIST)
422 silc_server_channel_key(server, sock, packet);
425 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
427 * Private message key packet.
429 if (packet->flags & SILC_PACKET_FLAG_LIST)
431 silc_server_private_message_key(server, sock, packet);
434 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
436 * Connection authentication request packet. When we receive this packet
437 * we will send to the other end information about our mandatory
438 * authentication method for the connection. This packet maybe received
441 if (packet->flags & SILC_PACKET_FLAG_LIST)
443 silc_server_connection_auth_request(server, sock, packet);
446 case SILC_PACKET_NEW_ID:
448 * Received New ID packet. This includes some new ID that has been
449 * created. It may be for client, server or channel. This is the way
450 * to distribute information about new registered entities in the
453 if (packet->flags & SILC_PACKET_FLAG_LIST)
454 silc_server_new_id_list(server, sock, packet);
456 silc_server_new_id(server, sock, packet);
459 case SILC_PACKET_NEW_CLIENT:
461 * Received new client packet. This includes client information that
462 * we will use to create initial client ID. After creating new
463 * ID we will send it to the client.
465 if (packet->flags & SILC_PACKET_FLAG_LIST)
467 silc_server_new_client(server, sock, packet);
470 case SILC_PACKET_NEW_SERVER:
472 * Received new server packet. This includes Server ID and some other
473 * information that we may save. This is received after server has
476 if (packet->flags & SILC_PACKET_FLAG_LIST)
478 silc_server_new_server(server, sock, packet);
481 case SILC_PACKET_NEW_CHANNEL:
483 * Received new channel packet. Information about new channel in the
484 * network are distributed using this packet.
486 if (packet->flags & SILC_PACKET_FLAG_LIST)
487 silc_server_new_channel_list(server, sock, packet);
489 silc_server_new_channel(server, sock, packet);
492 case SILC_PACKET_HEARTBEAT:
494 * Received heartbeat.
496 if (packet->flags & SILC_PACKET_FLAG_LIST)
500 case SILC_PACKET_KEY_AGREEMENT:
502 * Received heartbeat.
504 if (packet->flags & SILC_PACKET_FLAG_LIST)
506 silc_server_key_agreement(server, sock, packet);
509 case SILC_PACKET_REKEY:
511 * Received re-key packet. The sender wants to regenerate the session
514 if (packet->flags & SILC_PACKET_FLAG_LIST)
516 silc_server_rekey(server, sock, packet);
519 case SILC_PACKET_FTP:
521 if (packet->flags & SILC_PACKET_FLAG_LIST)
523 silc_server_ftp(server, sock, packet);
526 case SILC_PACKET_RESUME_CLIENT:
528 if (packet->flags & SILC_PACKET_FLAG_LIST)
530 silc_server_resume_client(server, sock, packet);
533 case SILC_PACKET_RESUME_ROUTER:
534 /* Resume router packet received. This packet is received for backup
535 router resuming protocol. */
536 if (packet->flags & SILC_PACKET_FLAG_LIST)
538 silc_server_backup_resume_router(server, sock, packet);
542 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
547 /****************************** Server API **********************************/
549 /* Allocates a new SILC server object. This has to be done before the server
550 can be used. After allocation one must call silc_server_init to initialize
551 the server. The new allocated server object is returned to the new_server
554 SilcBool silc_server_alloc(SilcServer *new_server)
558 SILC_LOG_DEBUG(("Allocating new server object"));
560 server = silc_calloc(1, sizeof(*server));
563 server->server_type = SILC_SERVER;
564 server->standalone = TRUE;
565 server->local_list = silc_calloc(1, sizeof(*server->local_list));
566 if (!server->local_list)
568 server->global_list = silc_calloc(1, sizeof(*server->global_list));
569 if (!server->global_list)
571 server->pending_commands = silc_dlist_init();
572 if (!server->pending_commands)
574 server->listeners = silc_dlist_init();
575 if (!server->listeners)
577 server->repository = silc_skr_alloc();
578 if (!server->repository)
580 server->conns = silc_dlist_init();
583 server->expired_clients = silc_dlist_init();
584 if (!server->expired_clients)
587 *new_server = server;
592 /* Free's the SILC server object. This is called at the very end before
595 void silc_server_free(SilcServer server)
598 SilcIDCacheEntry cache;
599 SilcIDListData idata;
601 SILC_LOG_DEBUG(("Free server %p", server));
606 silc_server_backup_free(server);
607 silc_server_config_unref(&server->config_ref);
609 silc_rng_free(server->rng);
610 if (server->public_key)
611 silc_pkcs_public_key_free(server->public_key);
612 if (server->private_key)
613 silc_pkcs_private_key_free(server->private_key);
614 if (server->pending_commands)
615 silc_dlist_uninit(server->pending_commands);
616 if (server->id_entry) {
617 if (server->id_entry->data.sconn)
618 silc_schedule_task_del_by_context(server->schedule,
619 server->id_entry->data.sconn->sock);
620 silc_idlist_del_server(server->local_list, server->id_entry);
623 /* Delete all channels */
624 if (silc_idcache_get_all(server->local_list->channels, &list)) {
625 silc_list_start(list);
626 while ((cache = silc_list_get(list)))
627 silc_idlist_del_channel(server->local_list, cache->context);
629 if (silc_idcache_get_all(server->global_list->channels, &list)) {
630 silc_list_start(list);
631 while ((cache = silc_list_get(list)))
632 silc_idlist_del_channel(server->global_list, cache->context);
635 /* Delete all clients */
636 if (silc_idcache_get_all(server->local_list->clients, &list)) {
637 silc_list_start(list);
638 while ((cache = silc_list_get(list))) {
639 silc_schedule_task_del_by_context(server->schedule, cache->context);
640 silc_idlist_del_client(server->local_list, cache->context);
643 if (silc_idcache_get_all(server->global_list->clients, &list)) {
644 silc_list_start(list);
645 while ((cache = silc_list_get(list))) {
646 silc_schedule_task_del_by_context(server->schedule, cache->context);
647 silc_idlist_del_client(server->global_list, cache->context);
651 /* Delete all servers */
652 if (silc_idcache_get_all(server->local_list->servers, &list)) {
653 silc_list_start(list);
654 while ((cache = silc_list_get(list))) {
655 idata = (SilcIDListData)cache->context;
657 silc_schedule_task_del_by_context(server->schedule,
659 silc_idlist_del_server(server->local_list, cache->context);
662 if (silc_idcache_get_all(server->global_list->servers, &list)) {
663 while ((cache = silc_list_get(list))) {
664 idata = (SilcIDListData)cache->context;
666 silc_schedule_task_del_by_context(server->schedule,
668 silc_idlist_del_server(server->global_list, cache->context);
672 silc_schedule_task_del_by_context(server->schedule, server);
673 silc_schedule_uninit(server->schedule);
674 server->schedule = NULL;
676 silc_idcache_free(server->local_list->clients);
677 silc_idcache_free(server->local_list->servers);
678 silc_idcache_free(server->local_list->channels);
679 silc_idcache_free(server->global_list->clients);
680 silc_idcache_free(server->global_list->servers);
681 silc_idcache_free(server->global_list->channels);
682 silc_hash_table_free(server->watcher_list);
683 silc_hash_table_free(server->watcher_list_pk);
684 silc_hash_free(server->md5hash);
685 silc_hash_free(server->sha1hash);
687 silc_dlist_uninit(server->listeners);
688 silc_dlist_uninit(server->conns);
689 silc_dlist_uninit(server->expired_clients);
690 silc_skr_free(server->repository);
691 silc_packet_engine_stop(server->packet_engine);
693 silc_free(server->local_list);
694 silc_free(server->global_list);
695 silc_free(server->server_name);
698 silc_hmac_unregister_all();
699 silc_hash_unregister_all();
700 silc_cipher_unregister_all();
701 silc_pkcs_unregister_all();
704 /* Creates a new server listener. */
706 static SilcNetListener
707 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
709 SilcNetListener listener;
712 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
713 server->config->require_reverse_lookup,
715 silc_server_accept_new_connection, server);
717 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
725 /* Adds a secondary listener. */
727 SilcBool silc_server_init_secondary(SilcServer server)
729 SilcServerConfigServerInfoInterface *interface;
730 SilcNetListener listener;
732 for (interface = server->config->server_info->secondary; interface;
733 interface = interface->next) {
734 listener = silc_server_listen(server, interface->server_ip,
738 silc_dlist_add(server->listeners, listener);
744 /* Initializes the entire SILC server. This is called always before running
745 the server. This is called only once at the initialization of the program.
746 This binds the server to its listenning port. After this function returns
747 one should call silc_server_run to start the server. This returns TRUE
748 when everything is ok to run the server. Configuration file must be
749 read and parsed before calling this. */
751 SilcBool silc_server_init(SilcServer server)
754 SilcServerEntry id_entry;
755 SilcNetListener listener;
759 SILC_LOG_DEBUG(("Initializing server"));
761 server->starttime = time(NULL);
763 /* Take config object for us */
764 silc_server_config_ref(&server->config_ref, server->config,
768 /* Set debugging on if configured */
769 if (server->config->debug_string) {
770 silc_log_debug(TRUE);
771 silc_log_set_debug_string(server->config->debug_string);
773 #endif /* SILC_DEBUG */
775 /* Steal public and private key from the config object */
776 server->public_key = server->config->server_info->public_key;
777 server->private_key = server->config->server_info->private_key;
778 server->config->server_info->public_key = NULL;
779 server->config->server_info->private_key = NULL;
781 /* Register all configured ciphers, PKCS and hash functions. */
782 if (!silc_server_config_register_ciphers(server))
783 silc_cipher_register_default();
784 if (!silc_server_config_register_pkcs(server))
785 silc_pkcs_register_default();
786 if (!silc_server_config_register_hashfuncs(server))
787 silc_hash_register_default();
788 if (!silc_server_config_register_hmacs(server))
789 silc_hmac_register_default();
791 /* Initialize random number generator for the server. */
792 server->rng = silc_rng_alloc();
793 silc_rng_init(server->rng);
794 silc_rng_global_init(server->rng);
796 /* Initialize hash functions for server to use */
797 silc_hash_alloc("md5", &server->md5hash);
798 silc_hash_alloc("sha1", &server->sha1hash);
800 /* Initialize the scheduler */
801 server->schedule = silc_schedule_init(server->config->param.connections_max,
803 if (!server->schedule)
806 /* First, register log files configuration for error output */
807 silc_server_config_setlogfiles(server);
809 /* Initialize ID caches */
810 server->local_list->clients =
811 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
813 server->local_list->servers =
814 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
816 server->local_list->channels =
817 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
820 /* These are allocated for normal server as well as these hold some
821 global information that the server has fetched from its router. For
822 router these are used as they are supposed to be used on router. */
823 server->global_list->clients =
824 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
826 server->global_list->servers =
827 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
829 server->global_list->channels =
830 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
833 /* Init watcher lists */
834 server->watcher_list =
835 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
836 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
838 if (!server->watcher_list)
840 server->watcher_list_pk =
841 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
842 silc_hash_public_key_compare, NULL,
844 if (!server->watcher_list_pk)
847 /* Create TCP listener */
848 listener = silc_server_listen(
850 server->config->server_info->primary == NULL ? NULL :
851 server->config->server_info->primary->server_ip,
852 server->config->server_info->primary == NULL ? 0 :
853 server->config->server_info->primary->port);
856 silc_dlist_add(server->listeners, listener);
858 /* Create a Server ID for the server. */
859 port = silc_net_listener_get_port(listener, NULL);
860 ip = silc_net_listener_get_ip(listener, NULL);
861 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
862 server->config->server_info->primary->public_ip :
863 ip[0], port[0], server->rng, &id);
872 server->server_name = server->config->server_info->server_name;
873 server->config->server_info->server_name = NULL;
874 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
875 sizeof(server->id_string), &server->id_string_len);
877 /* Add ourselves to the server list. We don't have a router yet
878 beacuse we haven't established a route yet. It will be done later.
879 For now, NULL is sent as router. This allocates new entry to
882 silc_idlist_add_server(server->local_list, strdup(server->server_name),
884 silc_id_dup(server->id, SILC_ID_SERVER),
887 SILC_LOG_ERROR(("Could not add local server to cache"));
890 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
891 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
892 SILC_CONN_SERVER : SILC_CONN_ROUTER);
893 server->id_entry = id_entry;
895 /* Create secondary TCP listeners */
896 if (silc_server_init_secondary(server) == FALSE)
899 server->listenning = TRUE;
901 /* Create connections to configured routers. */
902 silc_server_create_connections(server);
904 /* If server connections has been configured then we must be router as
905 normal server cannot have server connections, only router connections. */
906 if (server->config->servers) {
907 SilcServerConfigServer *ptr = server->config->servers;
909 server->server_type = SILC_ROUTER;
911 if (ptr->backup_router) {
912 server->server_type = SILC_BACKUP_ROUTER;
913 server->backup_router = TRUE;
914 server->id_entry->server_type = SILC_BACKUP_ROUTER;
921 if (server->server_type != SILC_ROUTER) {
922 server->stat.servers = 1;
923 server->stat.cell_servers = 1;
925 server->stat.routers = 1;
928 /* If we are normal server we'll retrieve network statisticial information
929 once in a while from the router. */
930 if (server->server_type != SILC_ROUTER)
931 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
934 /* Start packet engine */
935 server->packet_engine =
936 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
937 &silc_server_stream_cbs, server);
938 if (!server->packet_engine)
941 /* Register client entry expiration timeout */
942 silc_schedule_task_add_timeout(server->schedule,
943 silc_server_purge_expired_clients, server,
946 /* Initialize HTTP server */
947 silc_server_http_init(server);
949 SILC_LOG_DEBUG(("Server initialized"));
951 /* We are done here, return succesfully */
955 silc_server_config_unref(&server->config_ref);
959 /* Task callback to close a socket connection after rehash */
961 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
963 SilcServer server = app_context;
964 SilcPacketStream sock = context;
965 SilcIDListData idata = silc_packet_get_context(sock);
966 const char *hostname;
969 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
970 NULL, &hostname, NULL, &port);
972 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
973 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
974 silc_schedule_task_del_by_context(server->schedule, sock);
975 silc_server_disconnect_remote(server, sock,
976 SILC_STATUS_ERR_BANNED_FROM_SERVER,
977 "This connection is removed from "
979 silc_server_free_sock_user_data(server, sock, NULL);
982 /* This function basically reads the config file again and switches the config
983 object pointed by the server object. After that, we have to fix various
984 things such as the server_name and the listening ports.
985 Keep in mind that we no longer have the root privileges at this point. */
987 SilcBool silc_server_rehash(SilcServer server)
989 SilcServerConfig newconfig;
991 SILC_LOG_INFO(("Rehashing server"));
993 /* Reset the logging system */
994 silc_log_quick(TRUE);
995 silc_log_flush_all();
997 /* Start the main rehash phase (read again the config file) */
998 newconfig = silc_server_config_alloc(server->config_file, server);
1000 SILC_LOG_ERROR(("Rehash FAILED."));
1004 /* Fix the server_name field */
1005 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1006 silc_free(server->server_name);
1008 /* Check server name */
1009 server->server_name =
1010 silc_identifier_check(newconfig->server_info->server_name,
1011 strlen(newconfig->server_info->server_name),
1012 SILC_STRING_LOCALE, 256, NULL);
1013 if (!server->server_name) {
1014 SILC_LOG_ERROR(("Malformed server name string '%s'",
1015 server->config->server_info->server_name));
1019 /* Update the idcache list with a fresh pointer */
1020 silc_free(server->id_entry->server_name);
1021 server->id_entry->server_name = strdup(server->server_name);
1022 silc_idcache_update_by_context(server->local_list->servers,
1023 server->id_entry, NULL,
1024 strdup(server->id_entry->server_name),
1029 silc_server_config_setlogfiles(server);
1031 /* Change new key pair if necessary */
1032 if (newconfig->server_info->public_key &&
1033 !silc_pkcs_public_key_compare(server->public_key,
1034 newconfig->server_info->public_key)) {
1035 silc_pkcs_public_key_free(server->public_key);
1036 silc_pkcs_private_key_free(server->private_key);
1037 server->public_key = newconfig->server_info->public_key;
1038 server->private_key = newconfig->server_info->private_key;
1039 newconfig->server_info->public_key = NULL;
1040 newconfig->server_info->private_key = NULL;
1043 /* Check for unconfigured server and router connections and close
1044 connections that were unconfigured. */
1046 if (server->config->routers) {
1047 SilcServerConfigRouter *ptr;
1048 SilcServerConfigRouter *newptr;
1051 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1054 /* Check whether new config has this one too */
1055 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1056 if (silc_string_compare(newptr->host, ptr->host) &&
1057 newptr->port == ptr->port &&
1058 newptr->initiator == ptr->initiator) {
1064 if (!found && ptr->host) {
1065 /* Remove this connection */
1066 SilcPacketStream sock;
1067 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1068 ptr->host, ptr->port);
1070 silc_schedule_task_add_timeout(server->schedule,
1071 silc_server_rehash_close_connection,
1077 if (server->config->servers) {
1078 SilcServerConfigServer *ptr;
1079 SilcServerConfigServer *newptr;
1082 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1085 /* Check whether new config has this one too */
1086 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1087 if (silc_string_compare(newptr->host, ptr->host)) {
1093 if (!found && ptr->host) {
1094 /* Remove this connection */
1095 SilcPacketStream sock;
1096 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1099 silc_schedule_task_add_timeout(server->schedule,
1100 silc_server_rehash_close_connection,
1106 if (server->config->clients) {
1107 SilcServerConfigClient *ptr;
1108 SilcServerConfigClient *newptr;
1111 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1114 /* Check whether new config has this one too */
1115 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1116 if (silc_string_compare(newptr->host, ptr->host)) {
1122 if (!found && ptr->host) {
1123 /* Remove this connection */
1124 SilcPacketStream sock;
1125 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1128 silc_schedule_task_add_timeout(server->schedule,
1129 silc_server_rehash_close_connection,
1135 /* Create connections after rehash */
1136 silc_server_create_connections(server);
1138 /* Check whether our router status has changed */
1139 if (newconfig->servers) {
1140 SilcServerConfigServer *ptr = newconfig->servers;
1142 server->server_type = SILC_ROUTER;
1144 if (ptr->backup_router) {
1145 server->server_type = SILC_BACKUP_ROUTER;
1146 server->backup_router = TRUE;
1147 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1154 /* Our old config is gone now. We'll unreference our reference made in
1155 silc_server_init and then destroy it since we are destroying it
1156 underneath the application (layer which called silc_server_init). */
1157 silc_server_config_unref(&server->config_ref);
1158 silc_server_config_destroy(server->config);
1160 /* Take new config context */
1161 server->config = newconfig;
1162 silc_server_config_ref(&server->config_ref, server->config, server->config);
1165 /* Set debugging on if configured */
1166 if (server->config->debug_string) {
1167 silc_log_debug(TRUE);
1168 silc_log_set_debug_string(server->config->debug_string);
1170 #endif /* SILC_DEBUG */
1172 SILC_LOG_DEBUG(("Server rehashed"));
1177 /* The heart of the server. This runs the scheduler thus runs the server.
1178 When this returns the server has been stopped and the program will
1181 void silc_server_run(SilcServer server)
1183 SILC_LOG_INFO(("SILC Server started"));
1185 /* Start the scheduler, the heart of the SILC server. When this returns
1186 the program will be terminated. */
1187 silc_schedule(server->schedule);
1190 /* Stops the SILC server. This function is used to shutdown the server.
1191 This is usually called after the scheduler has returned. After stopping
1192 the server one should call silc_server_free. */
1194 void silc_server_stop(SilcServer server)
1197 SilcPacketStream ps;
1198 SilcNetListener listener;
1200 SILC_LOG_INFO(("SILC Server shutting down"));
1202 server->server_shutdown = TRUE;
1204 /* Close all connections */
1205 if (server->packet_engine) {
1206 list = silc_packet_engine_get_streams(server->packet_engine);
1208 silc_dlist_start(list);
1209 while ((ps = silc_dlist_get(list))) {
1210 SilcIDListData idata = silc_packet_get_context(ps);
1212 if (!silc_packet_stream_is_valid(ps))
1216 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1218 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1219 "Server is shutting down");
1220 silc_server_free_sock_user_data(server, ps,
1221 "Server is shutting down");
1223 silc_packet_engine_free_streams_list(list);
1226 /* We are not connected to network anymore */
1227 server->standalone = TRUE;
1229 silc_dlist_start(server->listeners);
1230 while ((listener = silc_dlist_get(server->listeners)))
1231 silc_net_close_listener(listener);
1233 silc_server_http_uninit(server);
1235 /* Cancel any possible retry timeouts */
1236 silc_schedule_task_del_by_callback(server->schedule,
1237 silc_server_connect_router);
1238 silc_schedule_task_del_by_callback(server->schedule,
1239 silc_server_connect_to_router_retry);
1240 silc_schedule_task_del_by_callback(server->schedule,
1241 silc_server_connect_to_router);
1243 silc_schedule_stop(server->schedule);
1245 SILC_LOG_DEBUG(("Server stopped"));
1248 /* Purge expired client entries from the server */
1250 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1252 SilcServer server = context;
1253 SilcClientEntry client;
1255 SilcUInt64 curtime = silc_time();
1257 SILC_LOG_DEBUG(("Expire timeout"));
1259 silc_dlist_start(server->expired_clients);
1260 while ((client = silc_dlist_get(server->expired_clients))) {
1261 if (client->data.status & SILC_IDLIST_STATUS_REGISTERED)
1264 /* For unregistered clients the created timestamp is actually
1265 unregistered timestamp. Make sure client remains in history
1266 at least 500 seconds. */
1267 if (curtime - client->data.created < 500)
1270 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1271 server->local_list : server->global_list);
1273 silc_idlist_del_data(client);
1274 silc_idlist_del_client(id_list, client);
1275 silc_dlist_del(server->expired_clients, client);
1278 silc_schedule_task_add_timeout(server->schedule,
1279 silc_server_purge_expired_clients, server,
1284 /******************************* Connecting *********************************/
1286 /* Free connection context */
1288 void silc_server_connection_free(SilcServerConnection sconn)
1290 SILC_LOG_DEBUG(("Free connection %p", sconn));
1291 silc_dlist_del(sconn->server->conns, sconn);
1292 silc_server_config_unref(&sconn->conn);
1293 silc_free(sconn->remote_host);
1294 silc_free(sconn->backup_replace_ip);
1298 /* Creates connection to a remote router. */
1300 void silc_server_create_connection(SilcServer server,
1303 const char *remote_host, SilcUInt32 port,
1304 SilcServerConnectCallback callback,
1307 SilcServerConnection sconn;
1309 /* Allocate connection object for hold connection specific stuff. */
1310 sconn = silc_calloc(1, sizeof(*sconn));
1313 sconn->remote_host = strdup(remote_host);
1314 sconn->remote_port = port;
1315 sconn->no_reconnect = reconnect == FALSE;
1316 sconn->callback = callback;
1317 sconn->callback_context = context;
1318 sconn->no_conf = dynamic;
1319 sconn->server = server;
1321 SILC_LOG_DEBUG(("Created connection %p", sconn));
1323 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1327 /* Connection authentication completion callback */
1330 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1333 SilcServerConnection sconn = context;
1334 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1335 SilcServer server = entry->server;
1336 SilcServerConfigServer *conn;
1337 SilcServerConfigConnParams *param;
1338 SilcIDListData idata;
1339 SilcServerEntry id_entry = NULL;
1340 unsigned char id[32];
1345 SILC_LOG_DEBUG(("Connection authentication completed"));
1349 if (success == FALSE) {
1350 /* Authentication failed */
1351 /* XXX retry connecting */
1353 silc_server_disconnect_remote(server, sconn->sock,
1354 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1355 if (sconn->callback)
1356 (*sconn->callback)(server, NULL, sconn->callback_context);
1357 silc_server_connection_free(sconn);
1361 /* XXX For now remote is router always */
1362 entry->data.conn_type = SILC_CONN_ROUTER;
1364 SILC_LOG_INFO(("Connected to %s %s",
1365 SILC_CONNTYPE_STRING(entry->data.conn_type),
1366 sconn->remote_host));
1368 /* Create the actual entry for remote entity */
1369 switch (entry->data.conn_type) {
1370 case SILC_CONN_SERVER:
1371 SILC_LOG_DEBUG(("Remote is SILC server"));
1373 /* Add new server. The server must register itself to us before it
1374 becomes registered to SILC network. */
1375 id_entry = silc_idlist_add_server(server->local_list,
1376 strdup(sconn->remote_host),
1377 SILC_SERVER, NULL, NULL, sconn->sock);
1379 silc_server_disconnect_remote(server, sconn->sock,
1380 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1381 if (sconn->callback)
1382 (*sconn->callback)(server, NULL, sconn->callback_context);
1383 silc_server_connection_free(sconn);
1389 server->stat.my_servers++;
1390 if (server->server_type == SILC_ROUTER)
1391 server->stat.servers++;
1392 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1394 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1397 case SILC_CONN_ROUTER:
1398 SILC_LOG_DEBUG(("Remote is SILC router"));
1400 /* Register to network */
1401 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1402 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1403 SILC_STR_UI_SHORT(id_len),
1404 SILC_STR_DATA(id, id_len),
1405 SILC_STR_UI_SHORT(strlen(server->server_name)),
1406 SILC_STR_DATA(server->server_name,
1407 strlen(server->server_name)),
1409 silc_server_disconnect_remote(server, sconn->sock,
1410 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1411 if (sconn->callback)
1412 (*sconn->callback)(server, NULL, sconn->callback_context);
1413 silc_server_connection_free(sconn);
1419 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1421 /* Check that we do not have this ID already */
1422 id_entry = silc_idlist_find_server_by_id(server->local_list,
1423 &remote_id.u.server_id,
1426 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1428 id_entry = silc_idlist_find_server_by_id(server->global_list,
1429 &remote_id.u.server_id,
1432 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1436 SILC_LOG_DEBUG(("New server id(%s)",
1437 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1439 /* Add the connected router to global server list. Router is sent
1440 as NULL since it's local to us. */
1441 id_entry = silc_idlist_add_server(server->global_list,
1442 strdup(sconn->remote_host),
1444 silc_id_dup(&remote_id.u.server_id,
1448 silc_server_disconnect_remote(server, sconn->sock,
1449 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1450 if (sconn->callback)
1451 (*sconn->callback)(server, NULL, sconn->callback_context);
1452 silc_server_connection_free(sconn);
1458 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1459 idata = (SilcIDListData)id_entry;
1460 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1461 SILC_IDLIST_STATUS_LOCAL);
1462 idata->sconn = sconn;
1465 server->stat.my_routers++;
1466 if (server->server_type == SILC_ROUTER)
1467 server->stat.routers++;
1468 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1470 if (!sconn->backup) {
1471 /* Mark this router our primary router if we're still standalone */
1472 if (server->standalone) {
1473 SILC_LOG_DEBUG(("This connection is our primary router"));
1474 server->id_entry->router = id_entry;
1475 server->router = id_entry;
1476 server->router->server_type = SILC_ROUTER;
1477 server->standalone = FALSE;
1478 server->backup_primary = FALSE;
1480 /* Announce data if we are not backup router (unless not as primary
1481 currently). Backup router announces later at the end of
1482 resuming protocol. */
1483 if (server->backup_router && server->server_type == SILC_ROUTER) {
1484 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1486 /* If we are router then announce our possible servers. Backup
1487 router announces also global servers. */
1488 if (server->server_type == SILC_ROUTER)
1489 silc_server_announce_servers(server,
1490 server->backup_router ? TRUE : FALSE,
1491 0, SILC_PRIMARY_ROUTE(server));
1493 /* Announce our clients and channels to the router */
1494 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1495 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1498 /* If we are backup router then this primary router is whom we are
1500 if (server->server_type == SILC_BACKUP_ROUTER) {
1501 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1503 NULL, NULL, &ip, NULL);
1504 silc_server_backup_add(server, server->id_entry, ip,
1505 sconn->remote_port, TRUE);
1509 /* We already have primary router. Disconnect this connection */
1510 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1511 silc_idlist_del_server(server->global_list, id_entry);
1512 silc_server_disconnect_remote(server, sconn->sock,
1513 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1514 if (sconn->callback)
1515 (*sconn->callback)(server, NULL, sconn->callback_context);
1516 silc_server_connection_free(sconn);
1522 /* Add this server to be our backup router */
1523 id_entry->server_type = SILC_BACKUP_ROUTER;
1524 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1525 sconn->backup_replace_port, FALSE);
1531 silc_server_disconnect_remote(server, sconn->sock,
1532 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1533 if (sconn->callback)
1534 (*sconn->callback)(server, NULL, sconn->callback_context);
1535 silc_server_connection_free(sconn);
1540 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1542 conn = sconn->conn.ref_ptr;
1543 param = &server->config->param;
1544 if (conn && conn->param)
1545 param = conn->param;
1547 /* Register rekey timeout */
1548 sconn->rekey_timeout = param->key_exchange_rekey;
1549 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1550 sconn->sock, sconn->rekey_timeout, 0);
1552 /* Set the entry as packet stream context */
1553 silc_packet_set_context(sconn->sock, id_entry);
1555 /* Call the completion callback to indicate that we've connected to
1557 if (sconn && sconn->callback)
1558 (*sconn->callback)(server, id_entry, sconn->callback_context);
1560 if (sconn == server->router_conn)
1561 server->router_conn = NULL;
1566 /* SKE completion callback */
1568 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1569 SilcSKESecurityProperties prop,
1570 SilcSKEKeyMaterial keymat,
1571 SilcSKERekeyMaterial rekey,
1574 SilcPacketStream sock = context;
1575 SilcUnknownEntry entry = silc_packet_get_context(sock);
1576 SilcServerConnection sconn = silc_ske_get_context(ske);
1577 SilcServer server = entry->server;
1578 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1579 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1580 void *auth_data = NULL;
1581 SilcUInt32 auth_data_len = 0;
1582 SilcConnAuth connauth;
1583 SilcCipher send_key, receive_key;
1584 SilcHmac hmac_send, hmac_receive;
1589 if (status != SILC_SKE_STATUS_OK) {
1591 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1592 silc_ske_map_status(status), entry->hostname, entry->ip));
1594 /* XXX retry connecting */
1596 silc_server_disconnect_remote(server, sconn->sock,
1597 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1598 if (sconn->callback)
1599 (*sconn->callback)(server, NULL, sconn->callback_context);
1600 silc_server_connection_free(sconn);
1604 SILC_LOG_DEBUG(("Setting keys into use"));
1606 /* Set the keys into use. The data will be encrypted after this. */
1607 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1608 &hmac_send, &hmac_receive, &hash)) {
1610 /* XXX retry connecting */
1612 /* Error setting keys */
1614 silc_server_disconnect_remote(server, sconn->sock,
1615 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1616 if (sconn->callback)
1617 (*sconn->callback)(server, NULL, sconn->callback_context);
1618 silc_server_connection_free(sconn);
1621 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1622 hmac_receive, FALSE);
1624 SILC_LOG_DEBUG(("Starting connection authentication"));
1626 connauth = silc_connauth_alloc(server->schedule, ske,
1627 server->config->conn_auth_timeout);
1629 /* XXX retry connecting */
1631 /** Error allocating auth protocol */
1633 silc_server_disconnect_remote(server, sconn->sock,
1634 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1635 if (sconn->callback)
1636 (*sconn->callback)(server, NULL, sconn->callback_context);
1637 silc_server_connection_free(sconn);
1641 /* Get authentication method */
1643 if (conn->passphrase) {
1644 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1645 auth_meth = SILC_AUTH_PUBLIC_KEY;
1646 auth_data = server->private_key;
1648 auth_meth = SILC_AUTH_PASSWORD;
1649 auth_data = conn->passphrase;
1650 auth_data_len = conn->passphrase_len;
1653 auth_meth = SILC_AUTH_PUBLIC_KEY;
1654 auth_data = server->private_key;
1658 entry->data.rekey = rekey;
1660 /* Start connection authentication */
1662 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1663 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1664 auth_data, auth_data_len,
1665 silc_server_ke_auth_compl, sconn);
1668 /* Function that is called when the network connection to a router has
1669 been established. This will continue with the key exchange protocol
1670 with the remote router. */
1672 void silc_server_start_key_exchange(SilcServerConnection sconn)
1674 SilcServer server = sconn->server;
1675 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1676 SilcUnknownEntry entry;
1677 SilcSKEParamsStruct params;
1680 /* Cancel any possible retry timeouts */
1681 silc_schedule_task_del_by_context(server->schedule, sconn);
1683 /* Create packet stream */
1684 sconn->sock = silc_packet_stream_create(server->packet_engine,
1685 server->schedule, sconn->stream);
1687 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1688 silc_stream_destroy(sconn->stream);
1689 if (sconn->callback)
1690 (*sconn->callback)(server, NULL, sconn->callback_context);
1691 silc_server_connection_free(sconn);
1694 server->stat.conn_num++;
1696 /* Set source ID to packet stream */
1697 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1699 silc_packet_stream_destroy(sconn->sock);
1700 if (sconn->callback)
1701 (*sconn->callback)(server, NULL, sconn->callback_context);
1702 silc_server_connection_free(sconn);
1706 /* Create entry for remote entity */
1707 entry = silc_calloc(1, sizeof(*entry));
1709 silc_packet_stream_destroy(sconn->sock);
1710 silc_server_connection_free(sconn);
1713 entry->server = server;
1714 silc_packet_set_context(sconn->sock, entry);
1716 /* Set Key Exchange flags from configuration, but fall back to global
1718 memset(¶ms, 0, sizeof(params));
1719 SILC_GET_SKE_FLAGS(conn, params.flags);
1720 if (server->config->param.key_exchange_pfs)
1721 params.flags |= SILC_SKE_SP_FLAG_PFS;
1723 /* Start SILC Key Exchange protocol */
1724 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1725 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1726 server->public_key, server->private_key, sconn);
1729 silc_packet_stream_destroy(sconn->sock);
1730 if (sconn->callback)
1731 (*sconn->callback)(server, NULL, sconn->callback_context);
1732 silc_server_connection_free(sconn);
1735 silc_ske_set_callbacks(ske, silc_server_verify_key,
1736 silc_server_ke_completed, sconn->sock);
1738 /* Start key exchange protocol */
1739 params.version = silc_version_string;
1740 params.timeout_secs = server->config->key_exchange_timeout;
1741 sconn->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1744 /* Timeout callback that will be called to retry connecting to remote
1745 router. This is used by both normal and router server. This will wait
1746 before retrying the connecting. The timeout is generated by exponential
1747 backoff algorithm. */
1749 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1751 SilcServerConnection sconn = context;
1752 SilcServer server = sconn->server;
1753 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1754 SilcServerConfigConnParams *param =
1755 (conn->param ? conn->param : &server->config->param);
1757 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1758 sconn->remote_port));
1760 /* Calculate next timeout */
1761 if (sconn->retry_count >= 1) {
1762 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1763 if (sconn->retry_timeout > param->reconnect_interval_max)
1764 sconn->retry_timeout = param->reconnect_interval_max;
1766 sconn->retry_timeout = param->reconnect_interval;
1768 sconn->retry_count++;
1769 sconn->retry_timeout = sconn->retry_timeout +
1770 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1772 /* If we've reached max retry count, give up. */
1773 if ((sconn->retry_count > param->reconnect_count) &&
1774 !param->reconnect_keep_trying) {
1775 SILC_LOG_ERROR(("Could not connect, giving up"));
1777 if (sconn->callback)
1778 (*sconn->callback)(server, NULL, sconn->callback_context);
1779 silc_server_connection_free(sconn);
1783 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1785 /* We will lookup a fresh pointer later */
1786 silc_server_config_unref(&sconn->conn);
1788 /* Wait before retrying */
1789 silc_schedule_task_del_by_context(server->schedule, sconn);
1790 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1791 sconn, sconn->retry_timeout, 0);
1794 /* Callback for async connection to remote router */
1796 static void silc_server_connection_established(SilcNetStatus status,
1800 SilcServerConnection sconn = context;
1801 SilcServer server = sconn->server;
1803 silc_schedule_task_del_by_context(server->schedule, sconn);
1808 SILC_LOG_DEBUG(("Connection to %s:%d established",
1809 sconn->remote_host, sconn->remote_port));
1811 /* Continue with key exchange protocol */
1812 sconn->stream = stream;
1813 silc_server_start_key_exchange(sconn);
1816 case SILC_NET_UNKNOWN_IP:
1817 case SILC_NET_UNKNOWN_HOST:
1818 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1819 sconn->remote_host, sconn->remote_port,
1820 silc_net_get_error_string(status)));
1822 if (sconn->callback)
1823 (*sconn->callback)(server, NULL, sconn->callback_context);
1824 silc_server_connection_free(sconn);
1828 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1829 sconn->remote_host, sconn->remote_port,
1830 silc_net_get_error_string(status)));
1831 if (!sconn->no_reconnect) {
1832 silc_schedule_task_add_timeout(sconn->server->schedule,
1833 silc_server_connect_to_router_retry,
1835 silc_dlist_del(server->conns, sconn);
1837 if (sconn->callback)
1838 (*sconn->callback)(server, NULL, sconn->callback_context);
1839 silc_server_connection_free(sconn);
1845 /* Generic routine to use connect to a router. */
1847 SILC_TASK_CALLBACK(silc_server_connect_router)
1849 SilcServerConnection sconn = context;
1850 SilcServer server = sconn->server;
1851 SilcServerConfigRouter *rconn;
1853 silc_schedule_task_del_by_context(server->schedule, sconn);
1855 /* Don't connect if we are shutting down. */
1856 if (server->server_shutdown) {
1857 if (sconn->callback)
1858 (*sconn->callback)(server, NULL, sconn->callback_context);
1859 silc_server_connection_free(sconn);
1863 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1864 (sconn->backup ? "backup router" : "router"),
1865 sconn->remote_host, sconn->remote_port));
1867 if (!sconn->no_conf) {
1868 /* Find connection configuration */
1869 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1870 sconn->remote_port);
1872 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1873 (sconn->backup ? "backup router" : "router"),
1874 sconn->remote_host, sconn->remote_port));
1875 silc_server_connection_free(sconn);
1878 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1881 /* Connect to remote host */
1883 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1884 server->config->server_info->primary->server_ip),
1885 sconn->remote_host, sconn->remote_port,
1886 server->schedule, silc_server_connection_established,
1889 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1890 sconn->remote_host, sconn->remote_port));
1891 silc_server_connection_free(sconn);
1895 /* Add to connection list */
1896 silc_dlist_add(server->conns, sconn);
1899 /* This function connects to our primary router or if we are a router this
1900 establishes all our primary routes. This is called at the start of the
1901 server to do authentication and key exchange with our router - called
1904 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1906 SilcServer server = context;
1907 SilcServerConnection sconn;
1908 SilcServerConfigRouter *ptr;
1910 /* Don't connect if we are shutting down. */
1911 if (server->server_shutdown)
1914 SILC_LOG_DEBUG(("We are %s",
1915 (server->server_type == SILC_SERVER ?
1916 "normal server" : server->server_type == SILC_ROUTER ?
1917 "router" : "backup router/normal server")));
1919 if (!server->config->routers) {
1920 /* There wasn't a configured router, we will continue but we don't
1921 have a connection to outside world. We will be standalone server. */
1922 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1923 server->standalone = TRUE;
1927 /* Cancel any possible retry timeouts */
1928 silc_schedule_task_del_by_callback(server->schedule,
1929 silc_server_connect_router);
1930 silc_schedule_task_del_by_callback(server->schedule,
1931 silc_server_connect_to_router_retry);
1933 /* Create the connections to all our routes */
1934 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1936 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1937 ptr->backup_router ? "Backup router" : "Router",
1938 ptr->initiator ? "Initiator" : "Responder",
1939 ptr->host, ptr->port));
1941 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1942 ptr->initiator == FALSE && !server->backup_router &&
1943 !silc_server_config_get_backup_router(server))
1944 server->wait_backup = TRUE;
1946 if (!ptr->initiator)
1948 if (ptr->dynamic_connection)
1951 /* Check whether we are connecting or connected to this host already */
1952 if (silc_server_num_sockets_by_remote(server,
1953 silc_net_is_ip(ptr->host) ?
1955 silc_net_is_ip(ptr->host) ?
1956 NULL : ptr->host, ptr->port,
1957 SILC_CONN_ROUTER)) {
1958 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1959 ptr->host, ptr->port));
1961 /* If we don't have primary router and this connection is our
1962 primary router we are in desync. Reconnect to the primary. */
1963 if (server->standalone && !server->router) {
1965 SilcPacketStream sock;
1966 SilcServerConfigRouter *primary =
1967 silc_server_config_get_primary_router(server);
1970 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1971 ptr->host, ptr->port);
1974 server->backup_noswitch = TRUE;
1975 silc_server_free_sock_user_data(server, sock, NULL);
1976 silc_server_disconnect_remote(server, sock, 0, NULL);
1977 server->backup_noswitch = FALSE;
1978 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1984 /* Allocate connection object for hold connection specific stuff. */
1985 sconn = silc_calloc(1, sizeof(*sconn));
1988 sconn->server = server;
1989 sconn->remote_host = strdup(ptr->host);
1990 sconn->remote_port = ptr->port;
1991 sconn->backup = ptr->backup_router;
1992 if (sconn->backup) {
1993 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1994 sconn->backup_replace_port = ptr->backup_replace_port;
1997 SILC_LOG_DEBUG(("Created connection %p", sconn));
1999 if (!server->router_conn && !sconn->backup)
2000 server->router_conn = sconn;
2003 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2009 /************************ Accepting new connection **************************/
2011 /* After this is called, server don't wait for backup router anymore.
2012 This gets called automatically even after we have backup router
2013 connection established. */
2015 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2017 SilcServer server = context;
2018 server->wait_backup = FALSE;
2021 /* Authentication data callback */
2024 silc_server_accept_get_auth(SilcConnAuth connauth,
2025 SilcConnectionType conn_type,
2026 unsigned char **passphrase,
2027 SilcUInt32 *passphrase_len,
2028 SilcSKR *repository,
2031 SilcPacketStream sock = context;
2032 SilcUnknownEntry entry = silc_packet_get_context(sock);
2033 SilcServer server = entry->server;
2035 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2037 /* Remote end is client */
2038 if (conn_type == SILC_CONN_CLIENT) {
2039 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2043 *passphrase = cconfig->passphrase;
2044 *passphrase_len = cconfig->passphrase_len;
2045 if (cconfig->publickeys)
2046 *repository = server->repository;
2048 if (cconfig->publickeys) {
2049 if (server->config->prefer_passphrase_auth) {
2053 *passphrase_len = 0;
2057 entry->conn_type = conn_type;
2061 /* Remote end is server */
2062 if (conn_type == SILC_CONN_SERVER) {
2063 SilcServerConfigServer *sconfig;
2065 /* If we are normal server, don't accept the connection */
2066 if (server->server_type == SILC_SERVER)
2069 sconfig = entry->sconfig.ref_ptr;
2073 *passphrase = sconfig->passphrase;
2074 *passphrase_len = sconfig->passphrase_len;
2075 if (sconfig->publickeys)
2076 *repository = server->repository;
2078 if (sconfig->publickeys) {
2079 if (server->config->prefer_passphrase_auth) {
2083 *passphrase_len = 0;
2087 entry->conn_type = conn_type;
2091 /* Remote end is router */
2092 if (conn_type == SILC_CONN_ROUTER) {
2093 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2097 *passphrase = rconfig->passphrase;
2098 *passphrase_len = rconfig->passphrase_len;
2099 if (rconfig->publickeys)
2100 *repository = server->repository;
2102 if (rconfig->publickeys) {
2103 if (server->config->prefer_passphrase_auth) {
2107 *passphrase_len = 0;
2111 entry->conn_type = conn_type;
2118 /* Authentication completion callback. */
2121 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2124 SilcPacketStream sock = context;
2125 SilcUnknownEntry entry = silc_packet_get_context(sock);
2126 SilcIDListData idata = (SilcIDListData)entry;
2127 SilcServer server = entry->server;
2128 SilcServerConfigConnParams *param = &server->config->param;
2129 SilcServerConnection sconn;
2131 const char *hostname, *ip;
2135 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2136 NULL, &hostname, &ip, &port);
2138 if (success == FALSE) {
2139 /* Authentication failed */
2140 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2141 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2142 server->stat.auth_failures++;
2143 silc_server_disconnect_remote(server, sock,
2144 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2148 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2150 switch (entry->conn_type) {
2151 case SILC_CONN_CLIENT:
2153 SilcClientEntry client;
2154 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2156 /* Verify whether this connection is after all allowed to connect */
2157 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2158 &server->config->param,
2160 silc_connauth_get_ske(connauth))) {
2161 server->stat.auth_failures++;
2165 /* If we are primary router and we have backup router configured
2166 but it has not connected to use yet, do not accept any other
2168 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2169 !server->backup_router) {
2170 SilcServerConfigRouter *router;
2171 router = silc_server_config_get_backup_router(server);
2172 if (router && strcmp(server->config->server_info->primary->server_ip,
2174 silc_server_find_socket_by_host(server,
2176 router->backup_replace_ip, 0)) {
2177 SILC_LOG_INFO(("Will not accept connections because we do "
2178 "not have backup router connection established"));
2179 silc_server_disconnect_remote(server, sock,
2180 SILC_STATUS_ERR_PERM_DENIED,
2181 "We do not have connection to backup "
2182 "router established, try later");
2183 server->stat.auth_failures++;
2185 /* From here on, wait 20 seconds for the backup router to appear. */
2186 silc_schedule_task_add_timeout(server->schedule,
2187 silc_server_backup_router_wait,
2188 (void *)server, 20, 0);
2193 SILC_LOG_DEBUG(("Remote host is client"));
2194 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2197 /* Add the client to the client ID cache. The nickname and Client ID
2198 and other information is created after we have received NEW_CLIENT
2199 packet from client. */
2200 client = silc_idlist_add_client(server->local_list,
2201 NULL, NULL, NULL, NULL, NULL, sock);
2203 SILC_LOG_ERROR(("Could not add new client to cache"));
2204 server->stat.auth_failures++;
2205 silc_server_disconnect_remote(server, sock,
2206 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2209 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2210 entry->data.conn_type = SILC_CONN_CLIENT;
2213 server->stat.my_clients++;
2214 server->stat.clients++;
2215 server->stat.cell_clients++;
2217 /* Get connection parameters */
2219 param = conn->param;
2221 if (!param->keepalive_secs)
2222 param->keepalive_secs = server->config->param.keepalive_secs;
2224 if (!param->qos && server->config->param.qos) {
2225 param->qos = server->config->param.qos;
2226 param->qos_rate_limit = server->config->param.qos_rate_limit;
2227 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2228 param->qos_limit_sec = server->config->param.qos_limit_sec;
2229 param->qos_limit_usec = server->config->param.qos_limit_usec;
2232 /* Check if to be anonymous connection */
2233 if (param->anonymous)
2234 client->mode |= SILC_UMODE_ANONYMOUS;
2237 /* Add public key to repository */
2238 SILC_LOG_DEBUG(("Add client public key to repository"));
2239 if (!silc_server_get_public_key_by_client(server, client, NULL))
2240 silc_skr_add_public_key_simple(server->repository,
2241 entry->data.public_key,
2242 SILC_SKR_USAGE_IDENTIFICATION, client,
2245 id_entry = (void *)client;
2249 case SILC_CONN_SERVER:
2250 case SILC_CONN_ROUTER:
2252 SilcServerEntry new_server;
2253 SilcBool initiator = FALSE;
2254 SilcBool backup_local = FALSE;
2255 SilcBool backup_router = FALSE;
2256 char *backup_replace_ip = NULL;
2257 SilcUInt16 backup_replace_port = 0;
2258 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2259 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2261 /* If we are backup router and this is incoming server connection
2262 and we do not have connection to primary router, do not allow
2264 if (server->server_type == SILC_BACKUP_ROUTER &&
2265 entry->conn_type == SILC_CONN_SERVER &&
2266 !SILC_PRIMARY_ROUTE(server)) {
2267 SILC_LOG_INFO(("Will not accept server connection because we do "
2268 "not have primary router connection established"));
2269 silc_server_disconnect_remote(server, sock,
2270 SILC_STATUS_ERR_PERM_DENIED,
2271 "We do not have connection to primary "
2272 "router established, try later");
2273 server->stat.auth_failures++;
2277 if (entry->conn_type == SILC_CONN_ROUTER) {
2278 /* Verify whether this connection is after all allowed to connect */
2279 if (!silc_server_connection_allowed(server, sock,
2281 &server->config->param,
2282 rconn ? rconn->param : NULL,
2283 silc_connauth_get_ske(connauth))) {
2284 server->stat.auth_failures++;
2290 param = rconn->param;
2292 if (!param->keepalive_secs)
2293 param->keepalive_secs = server->config->param.keepalive_secs;
2295 if (!param->qos && server->config->param.qos) {
2296 param->qos = server->config->param.qos;
2297 param->qos_rate_limit = server->config->param.qos_rate_limit;
2298 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2299 param->qos_limit_sec = server->config->param.qos_limit_sec;
2300 param->qos_limit_usec = server->config->param.qos_limit_usec;
2304 initiator = rconn->initiator;
2305 backup_local = rconn->backup_local;
2306 backup_router = rconn->backup_router;
2307 backup_replace_ip = rconn->backup_replace_ip;
2308 backup_replace_port = rconn->backup_replace_port;
2312 if (entry->conn_type == SILC_CONN_SERVER) {
2313 /* Verify whether this connection is after all allowed to connect */
2314 if (!silc_server_connection_allowed(server, sock,
2316 &server->config->param,
2317 srvconn ? srvconn->param : NULL,
2318 silc_connauth_get_ske(connauth))) {
2319 server->stat.auth_failures++;
2323 if (srvconn->param) {
2324 param = srvconn->param;
2326 if (!param->keepalive_secs)
2327 param->keepalive_secs = server->config->param.keepalive_secs;
2329 if (!param->qos && server->config->param.qos) {
2330 param->qos = server->config->param.qos;
2331 param->qos_rate_limit = server->config->param.qos_rate_limit;
2332 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2333 param->qos_limit_sec = server->config->param.qos_limit_sec;
2334 param->qos_limit_usec = server->config->param.qos_limit_usec;
2338 backup_router = srvconn->backup_router;
2342 /* If we are primary router and we have backup router configured
2343 but it has not connected to use yet, do not accept any other
2345 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2346 !server->backup_router && !backup_router) {
2347 SilcServerConfigRouter *router;
2348 router = silc_server_config_get_backup_router(server);
2349 if (router && strcmp(server->config->server_info->primary->server_ip,
2351 silc_server_find_socket_by_host(server,
2353 router->backup_replace_ip, 0)) {
2354 SILC_LOG_INFO(("Will not accept connections because we do "
2355 "not have backup router connection established"));
2356 silc_server_disconnect_remote(server, sock,
2357 SILC_STATUS_ERR_PERM_DENIED,
2358 "We do not have connection to backup "
2359 "router established, try later");
2360 server->stat.auth_failures++;
2362 /* From here on, wait 20 seconds for the backup router to appear. */
2363 silc_schedule_task_add_timeout(server->schedule,
2364 silc_server_backup_router_wait,
2365 (void *)server, 20, 0);
2370 SILC_LOG_DEBUG(("Remote host is %s",
2371 entry->conn_type == SILC_CONN_SERVER ?
2372 "server" : (backup_router ?
2373 "backup router" : "router")));
2374 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2375 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2376 "server" : (backup_router ?
2377 "backup router" : "router")));
2379 /* Add the server into server cache. The server name and Server ID
2380 is updated after we have received NEW_SERVER packet from the
2381 server. We mark ourselves as router for this server if we really
2384 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2385 server->local_list : (backup_router ?
2386 server->local_list :
2387 server->global_list)),
2389 (entry->conn_type == SILC_CONN_SERVER ?
2390 SILC_SERVER : SILC_ROUTER),
2392 (entry->conn_type == SILC_CONN_SERVER ?
2393 server->id_entry : (backup_router ?
2394 server->id_entry : NULL)),
2397 SILC_LOG_ERROR(("Could not add new server to cache"));
2398 silc_server_disconnect_remote(server, sock,
2399 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2400 server->stat.auth_failures++;
2403 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2404 entry->data.conn_type = entry->conn_type;
2406 id_entry = (void *)new_server;
2408 /* If the incoming connection is router and marked as backup router
2409 then add it to be one of our backups */
2410 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2411 /* Change it back to SERVER type since that's what it really is. */
2413 entry->data.conn_type = SILC_CONN_SERVER;
2414 new_server->server_type = SILC_BACKUP_ROUTER;
2416 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2417 ("Backup router %s is now online",
2420 /* Remove the backup waiting with timeout */
2421 silc_schedule_task_add_timeout(server->schedule,
2422 silc_server_backup_router_wait,
2423 (void *)server, 10, 0);
2427 if (entry->data.conn_type == SILC_CONN_SERVER) {
2428 server->stat.my_servers++;
2429 server->stat.servers++;
2430 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2432 server->stat.my_routers++;
2433 server->stat.routers++;
2434 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2437 /* Check whether this connection is to be our primary router connection
2438 if we do not already have the primary route. */
2439 if (!backup_router &&
2440 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2441 if (silc_server_config_is_primary_route(server) && !initiator)
2444 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2445 server->standalone = FALSE;
2446 if (!server->id_entry->router) {
2447 server->id_entry->router = id_entry;
2448 server->router = id_entry;
2460 /* Add connection to server->conns so that we know we have connection
2462 sconn = silc_calloc(1, sizeof(*sconn));
2463 sconn->server = server;
2465 sconn->remote_host = strdup(hostname);
2466 sconn->remote_port = port;
2467 silc_dlist_add(server->conns, sconn);
2468 idata->sconn = sconn;
2469 idata->last_receive = time(NULL);
2471 /* Add the common data structure to the ID entry. */
2472 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2473 silc_packet_set_context(sock, id_entry);
2475 /* Connection has been fully established now. Everything is ok. */
2476 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2478 /* Perform Quality of Service */
2480 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2481 param->qos_rate_limit, param->qos_bytes_limit,
2482 param->qos_limit_sec, param->qos_limit_usec);
2484 silc_server_config_unref(&entry->cconfig);
2485 silc_server_config_unref(&entry->sconfig);
2486 silc_server_config_unref(&entry->rconfig);
2490 silc_ske_free(silc_connauth_get_ske(connauth));
2491 silc_connauth_free(connauth);
2494 /* SKE completion callback. We set the new keys into use here. */
2497 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2498 SilcSKESecurityProperties prop,
2499 SilcSKEKeyMaterial keymat,
2500 SilcSKERekeyMaterial rekey,
2503 SilcPacketStream sock = context;
2504 SilcUnknownEntry entry = silc_packet_get_context(sock);
2505 SilcIDListData idata = (SilcIDListData)entry;
2506 SilcServer server = entry->server;
2507 SilcConnAuth connauth;
2508 SilcCipher send_key, receive_key;
2509 SilcHmac hmac_send, hmac_receive;
2516 if (status != SILC_SKE_STATUS_OK) {
2518 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2519 silc_ske_map_status(status), entry->hostname, entry->ip));
2521 silc_server_disconnect_remote(server, sock,
2522 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2526 SILC_LOG_DEBUG(("Setting keys into use"));
2528 /* Set the keys into use. The data will be encrypted after this. */
2529 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2530 &hmac_send, &hmac_receive, &hash)) {
2531 /* Error setting keys */
2533 silc_server_disconnect_remote(server, sock,
2534 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2537 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2538 hmac_receive, FALSE);
2540 idata->rekey = rekey;
2541 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2542 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2543 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2545 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2547 SILC_LOG_DEBUG(("Starting connection authentication"));
2548 server->stat.auth_attempts++;
2550 connauth = silc_connauth_alloc(server->schedule, ske,
2551 server->config->conn_auth_timeout);
2553 /** Error allocating auth protocol */
2555 silc_server_disconnect_remote(server, sock,
2556 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2560 /* Start connection authentication */
2562 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2563 silc_server_accept_auth_compl, sock);
2566 /* Accept new TCP connection */
2568 static void silc_server_accept_new_connection(SilcNetStatus status,
2572 SilcServer server = context;
2573 SilcPacketStream packet_stream;
2574 SilcServerConfigClient *cconfig = NULL;
2575 SilcServerConfigServer *sconfig = NULL;
2576 SilcServerConfigRouter *rconfig = NULL;
2577 SilcServerConfigDeny *deny;
2578 SilcUnknownEntry entry;
2580 SilcSKEParamsStruct params;
2581 char *hostname, *ip;
2584 SILC_LOG_DEBUG(("Accepting new connection"));
2586 /* Check for maximum allowed connections */
2587 server->stat.conn_attempts++;
2588 if (silc_dlist_count(server->conns) >
2589 server->config->param.connections_max) {
2590 SILC_LOG_ERROR(("Refusing connection, server is full"));
2591 server->stat.conn_failures++;
2592 silc_stream_destroy(stream);
2596 /* Get hostname, IP and port */
2597 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2598 (const char **)&ip, &port)) {
2599 /* Bad socket stream */
2600 server->stat.conn_failures++;
2601 silc_stream_destroy(stream);
2605 /* Create packet stream */
2606 packet_stream = silc_packet_stream_create(server->packet_engine,
2607 server->schedule, stream);
2608 if (!packet_stream) {
2609 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2610 server->stat.conn_failures++;
2611 silc_stream_destroy(stream);
2614 server->stat.conn_num++;
2616 /* Set source ID to packet stream */
2617 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2620 server->stat.conn_failures++;
2621 silc_packet_stream_destroy(packet_stream);
2625 /* Check whether this connection is denied to connect to us. */
2626 deny = silc_server_config_find_denied(server, ip);
2628 deny = silc_server_config_find_denied(server, hostname);
2630 /* The connection is denied */
2631 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2632 silc_server_disconnect_remote(server, packet_stream,
2633 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2638 /* Check whether we have configured this sort of connection at all. We
2639 have to check all configurations since we don't know what type of
2640 connection this is. */
2641 if (!(cconfig = silc_server_config_find_client(server, ip)))
2642 cconfig = silc_server_config_find_client(server, hostname);
2643 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2644 sconfig = silc_server_config_find_server_conn(server, hostname);
2645 if (server->server_type == SILC_ROUTER)
2646 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2647 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2648 if (!cconfig && !sconfig && !rconfig) {
2649 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2650 server->stat.conn_failures++;
2651 silc_server_disconnect_remote(server, packet_stream,
2652 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2656 /* The connection is allowed */
2657 entry = silc_calloc(1, sizeof(*entry));
2659 server->stat.conn_failures++;
2660 silc_server_disconnect_remote(server, packet_stream,
2661 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2664 entry->hostname = hostname;
2667 entry->server = server;
2668 entry->data.conn_type = SILC_CONN_UNKNOWN;
2669 silc_packet_set_context(packet_stream, entry);
2671 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2672 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2673 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2675 /* Take flags for key exchange. Since we do not know what type of connection
2676 this is, we go through all found configurations and use the global ones
2677 as well. This will result always into strictest key exchange flags. */
2678 memset(¶ms, 0, sizeof(params));
2679 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2680 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2681 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2682 if (server->config->param.key_exchange_pfs)
2683 params.flags |= SILC_SKE_SP_FLAG_PFS;
2685 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2686 server->stat.conn_attempts++;
2688 /* Start SILC Key Exchange protocol */
2689 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2690 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2691 server->public_key, server->private_key,
2694 server->stat.conn_failures++;
2695 silc_server_disconnect_remote(server, packet_stream,
2696 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2699 silc_ske_set_callbacks(ske, silc_server_verify_key,
2700 silc_server_accept_completed, packet_stream);
2702 /* Start key exchange protocol */
2703 params.version = silc_version_string;
2704 params.timeout_secs = server->config->key_exchange_timeout;
2705 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2709 /********************************** Rekey ***********************************/
2711 /* Initiator rekey completion callback */
2713 static void silc_server_rekey_completion(SilcSKE ske,
2714 SilcSKEStatus status,
2715 const SilcSKESecurityProperties prop,
2716 const SilcSKEKeyMaterial keymat,
2717 SilcSKERekeyMaterial rekey,
2720 SilcPacketStream sock = context;
2721 SilcIDListData idata = silc_packet_get_context(sock);
2722 SilcServer server = idata->sconn->server;
2724 idata->sconn->op = NULL;
2725 if (status != SILC_SKE_STATUS_OK) {
2726 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2727 idata->sconn->remote_host));
2731 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2732 idata->sconn->remote_host, idata->sconn->remote_port,
2733 SILC_CONNTYPE_STRING(idata->conn_type)));
2735 /* Save rekey data for next rekey */
2736 idata->rekey = rekey;
2738 /* Register new rekey timeout */
2739 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2740 sock, idata->sconn->rekey_timeout, 0);
2743 /* Rekey callback. Start rekey as initiator */
2745 SILC_TASK_CALLBACK(silc_server_do_rekey)
2747 SilcServer server = app_context;
2748 SilcPacketStream sock = context;
2749 SilcIDListData idata = silc_packet_get_context(sock);
2752 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2754 /* Do not execute rekey with disabled connections */
2755 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2758 /* If another protocol is active do not start rekey */
2759 if (idata->sconn->op) {
2760 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2761 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2766 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2767 idata->sconn->remote_host, idata->sconn->remote_port,
2768 SILC_CONNTYPE_STRING(idata->conn_type)));
2771 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2772 server->public_key, NULL, sock);
2776 /* Set SKE callbacks */
2777 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2780 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2783 /* Responder rekey completion callback */
2786 silc_server_rekey_resp_completion(SilcSKE ske,
2787 SilcSKEStatus status,
2788 const SilcSKESecurityProperties prop,
2789 const SilcSKEKeyMaterial keymat,
2790 SilcSKERekeyMaterial rekey,
2793 SilcPacketStream sock = context;
2794 SilcIDListData idata = silc_packet_get_context(sock);
2796 idata->sconn->op = NULL;
2797 if (status != SILC_SKE_STATUS_OK) {
2798 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2799 idata->sconn->remote_host));
2803 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2804 idata->sconn->remote_host, idata->sconn->remote_port,
2805 SILC_CONNTYPE_STRING(idata->conn_type)));
2807 /* Save rekey data for next rekey */
2808 idata->rekey = rekey;
2811 /* Start rekey as responder */
2813 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2816 SilcIDListData idata = silc_packet_get_context(sock);
2819 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2820 idata->sconn->remote_host, idata->sconn->remote_port,
2821 SILC_CONNTYPE_STRING(idata->conn_type)));
2824 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2825 server->public_key, NULL, sock);
2827 silc_packet_free(packet);
2831 /* Set SKE callbacks */
2832 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2835 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2840 /****************************** Disconnection *******************************/
2842 /* Destroys packet stream. */
2844 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2846 silc_packet_stream_destroy(context);
2849 /* Closes connection to socket connection */
2851 void silc_server_close_connection(SilcServer server,
2852 SilcPacketStream sock)
2854 SilcIDListData idata = silc_packet_get_context(sock);
2856 const char *hostname;
2859 memset(tmp, 0, sizeof(tmp));
2860 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2861 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2862 NULL, &hostname, NULL, &port);
2863 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2864 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2865 tmp[0] ? tmp : ""));
2867 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2869 if (idata && idata->sconn) {
2870 silc_server_connection_free(idata->sconn);
2871 idata->sconn = NULL;
2874 /* Close connection with timeout */
2875 server->stat.conn_num--;
2876 silc_schedule_task_del_by_all(server->schedule, 0,
2877 silc_server_close_connection_final, sock);
2878 silc_schedule_task_add_timeout(server->schedule,
2879 silc_server_close_connection_final,
2883 /* Sends disconnect message to remote connection and disconnects the
2886 void silc_server_disconnect_remote(SilcServer server,
2887 SilcPacketStream sock,
2888 SilcStatus status, ...)
2890 unsigned char buf[512];
2897 SILC_LOG_DEBUG(("Disconnecting remote host"));
2899 va_start(ap, status);
2900 cp = va_arg(ap, char *);
2902 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2905 /* Send SILC_PACKET_DISCONNECT */
2906 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2907 SILC_STR_UI_CHAR(status),
2908 SILC_STR_UI8_STRING(cp ? buf : NULL),
2911 /* Close connection */
2912 silc_server_close_connection(server, sock);
2915 /* Frees client data and notifies about client's signoff. */
2917 void silc_server_free_client_data(SilcServer server,
2918 SilcPacketStream sock,
2919 SilcClientEntry client,
2921 const char *signoff)
2923 SILC_LOG_DEBUG(("Freeing client %p data", client));
2926 /* Check if anyone is watching this nickname */
2927 if (server->server_type == SILC_ROUTER)
2928 silc_server_check_watcher_list(server, client, NULL,
2929 SILC_NOTIFY_TYPE_SIGNOFF);
2931 /* Send SIGNOFF notify to routers. */
2933 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2934 SILC_BROADCAST(server), client->id,
2938 /* Remove client from all channels */
2940 silc_server_remove_from_channels(server, NULL, client,
2941 TRUE, (char *)signoff, TRUE, FALSE);
2943 silc_server_remove_from_channels(server, NULL, client,
2944 FALSE, NULL, FALSE, FALSE);
2946 /* Remove this client from watcher list if it is */
2947 silc_server_del_from_watcher_list(server, client);
2949 /* Remove client's public key from repository, this will free it too. */
2950 if (client->data.public_key) {
2951 silc_skr_del_public_key(server->repository, client->data.public_key,
2953 client->data.public_key = NULL;
2956 /* Update statistics */
2957 server->stat.my_clients--;
2958 server->stat.clients--;
2959 if (server->stat.cell_clients)
2960 server->stat.cell_clients--;
2961 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2962 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2963 silc_schedule_task_del_by_context(server->schedule, client);
2965 if (client->data.sconn)
2966 silc_server_connection_free(client->data.sconn);
2968 /* We will not delete the client entry right away. We will take it
2969 into history (for WHOWAS command) for 5 minutes, unless we're
2970 shutting down server. */
2971 if (!server->server_shutdown) {
2972 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2974 client->router = NULL;
2975 client->connection = NULL;
2976 client->data.created = silc_time();
2977 silc_dlist_add(server->expired_clients, client);
2979 /* Delete directly since we're shutting down server */
2980 SILC_LOG_DEBUG(("Delete client directly"));
2981 silc_idlist_del_data(client);
2982 silc_idlist_del_client(server->local_list, client);
2986 /* Frees user_data pointer from socket connection object. This also sends
2987 appropriate notify packets to the network to inform about leaving
2990 void silc_server_free_sock_user_data(SilcServer server,
2991 SilcPacketStream sock,
2992 const char *signoff_message)
2994 SilcIDListData idata = silc_packet_get_context(sock);
2998 SILC_LOG_DEBUG(("Start"));
3003 silc_schedule_task_del_by_context(server->schedule, sock);
3005 /* Cancel active protocols */
3007 if (idata->sconn && idata->sconn->op) {
3008 SILC_LOG_DEBUG(("Abort active protocol"));
3009 silc_async_abort(idata->sconn->op, NULL, NULL);
3011 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3012 ((SilcUnknownEntry)idata)->op) {
3013 SILC_LOG_DEBUG(("Abort active protocol"));
3014 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3018 switch (idata->conn_type) {
3019 case SILC_CONN_CLIENT:
3021 SilcClientEntry client_entry = (SilcClientEntry)idata;
3022 silc_server_free_client_data(server, sock, client_entry, TRUE,
3024 silc_packet_set_context(sock, NULL);
3028 case SILC_CONN_SERVER:
3029 case SILC_CONN_ROUTER:
3031 SilcServerEntry user_data = (SilcServerEntry)idata;
3032 SilcServerEntry backup_router = NULL;
3034 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3037 backup_router = silc_server_backup_get(server, user_data->id);
3039 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3040 backup_router == server->id_entry &&
3041 idata->conn_type != SILC_CONN_ROUTER)
3042 backup_router = NULL;
3044 if (server->server_shutdown || server->backup_noswitch)
3045 backup_router = NULL;
3047 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3048 NULL, NULL, &ip, &port);
3050 /* If this was our primary router connection then we're lost to
3051 the outside world. */
3052 if (server->router == user_data) {
3053 /* Check whether we have a backup router connection */
3054 if (!backup_router || backup_router == user_data) {
3055 if (!server->no_reconnect)
3056 silc_server_create_connections(server);
3057 server->id_entry->router = NULL;
3058 server->router = NULL;
3059 server->standalone = TRUE;
3060 server->backup_primary = FALSE;
3061 backup_router = NULL;
3063 if (server->id_entry != backup_router) {
3064 SILC_LOG_INFO(("New primary router is backup router %s",
3065 backup_router->server_name));
3066 server->id_entry->router = backup_router;
3067 server->router = backup_router;
3068 server->router_connect = time(0);
3069 server->backup_primary = TRUE;
3070 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3072 /* Send START_USE to backup router to indicate we have switched */
3073 silc_server_backup_send_start_use(server,
3074 backup_router->connection,
3077 SILC_LOG_INFO(("We are now new primary router in this cell"));
3078 server->id_entry->router = NULL;
3079 server->router = NULL;
3080 server->standalone = TRUE;
3083 /* We stop here to take a breath */
3086 if (server->backup_router) {
3087 server->server_type = SILC_ROUTER;
3089 /* We'll need to constantly try to reconnect to the primary
3090 router so that we'll see when it comes back online. */
3091 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3092 silc_server_backup_connected,
3096 /* Mark this connection as replaced */
3097 silc_server_backup_replaced_add(server, user_data->id,
3100 } else if (backup_router) {
3101 SILC_LOG_INFO(("Enabling the use of backup router %s",
3102 backup_router->server_name));
3104 /* Mark this connection as replaced */
3105 silc_server_backup_replaced_add(server, user_data->id,
3107 } else if (server->server_type == SILC_SERVER &&
3108 idata->conn_type == SILC_CONN_ROUTER) {
3109 /* Reconnect to the router (backup) */
3110 if (!server->no_reconnect)
3111 silc_server_create_connections(server);
3114 if (user_data->server_name)
3115 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3116 ("Server %s signoff", user_data->server_name));
3118 if (!backup_router) {
3119 /* Remove all servers that are originated from this server, and
3120 remove the clients of those servers too. */
3121 silc_server_remove_servers_by_server(server, user_data, TRUE);
3124 /* Remove the clients that this server owns as they will become
3125 invalid now too. For backup router the server is actually
3126 coming from the primary router, so mark that as the owner
3128 if (server->server_type == SILC_BACKUP_ROUTER &&
3129 sock->type == SILC_CONN_SERVER)
3130 silc_server_remove_clients_by_server(server, server->router,
3134 silc_server_remove_clients_by_server(server, user_data,
3137 /* Remove channels owned by this server */
3138 if (server->server_type == SILC_SERVER)
3139 silc_server_remove_channels_by_server(server, user_data);
3141 /* Enable local server connections that may be disabled */
3142 silc_server_local_servers_toggle_enabled(server, TRUE);
3144 /* Update the client entries of this server to the new backup
3145 router. If we are the backup router we also resolve the real
3146 servers for the clients. After updating is over this also
3147 removes the clients that this server explicitly owns. */
3148 silc_server_update_clients_by_server(server, user_data,
3149 backup_router, TRUE);
3151 /* If we are router and just lost our primary router (now standlaone)
3152 we remove everything that was behind it, since we don't know
3154 if (server->server_type == SILC_ROUTER && server->standalone)
3155 /* Remove all servers that are originated from this server, and
3156 remove the clients of those servers too. */
3157 silc_server_remove_servers_by_server(server, user_data, TRUE);
3159 /* Finally remove the clients that are explicitly owned by this
3160 server. They go down with the server. */
3161 silc_server_remove_clients_by_server(server, user_data,
3164 /* Update our server cache to use the new backup router too. */
3165 silc_server_update_servers_by_server(server, user_data, backup_router);
3166 if (server->server_type == SILC_SERVER)
3167 silc_server_update_channels_by_server(server, user_data,
3170 /* Send notify about primary router going down to local operators */
3171 if (server->backup_router)
3172 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3173 SILC_NOTIFY_TYPE_NONE,
3174 ("%s switched to backup router %s "
3175 "(we are primary router now)",
3176 server->server_name, server->server_name));
3177 else if (server->router)
3178 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3179 SILC_NOTIFY_TYPE_NONE,
3180 ("%s switched to backup router %s",
3181 server->server_name,
3182 server->router->server_name));
3184 server->backup_noswitch = FALSE;
3187 silc_server_connection_free(idata->sconn);
3190 if (idata->conn_type == SILC_CONN_SERVER) {
3191 server->stat.my_servers--;
3192 server->stat.servers--;
3193 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3194 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3195 server->stat.my_routers--;
3196 server->stat.routers--;
3197 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3199 if (server->server_type == SILC_ROUTER)
3200 server->stat.cell_servers--;
3202 /* Free the server entry */
3203 silc_server_backup_del(server, user_data);
3204 silc_server_backup_replaced_del(server, user_data);
3205 silc_idlist_del_data(user_data);
3206 if (!silc_idlist_del_server(server->local_list, user_data))
3207 silc_idlist_del_server(server->global_list, user_data);
3209 if (backup_router && backup_router != server->id_entry) {
3210 /* Announce all of our stuff that was created about 5 minutes ago.
3211 The backup router knows all the other stuff already. */
3212 if (server->server_type == SILC_ROUTER)
3213 silc_server_announce_servers(server, FALSE, time(0) - 300,
3214 backup_router->connection);
3216 /* Announce our clients and channels to the router */
3217 silc_server_announce_clients(server, time(0) - 300,
3218 backup_router->connection);
3219 silc_server_announce_channels(server, time(0) - 300,
3220 backup_router->connection);
3223 silc_packet_set_context(sock, NULL);
3229 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3231 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3234 silc_server_connection_free(idata->sconn);
3235 silc_idlist_del_data(idata);
3237 silc_packet_set_context(sock, NULL);
3243 /* Removes client from all channels it has joined. This is used when client
3244 connection is disconnected. If the client on a channel is last, the
3245 channel is removed as well. This sends the SIGNOFF notify types. */
3247 void silc_server_remove_from_channels(SilcServer server,
3248 SilcPacketStream sock,
3249 SilcClientEntry client,
3251 const char *signoff_message,
3255 SilcChannelEntry channel;
3256 SilcChannelClientEntry chl;
3257 SilcHashTableList htl;
3258 SilcBuffer clidp = NULL;
3263 if (notify && !client->id)
3266 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3267 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3270 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3275 /* Remove the client from all channels. The client is removed from
3276 the channels' user list. */
3277 silc_hash_table_list(client->channels, &htl);
3278 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3279 channel = chl->channel;
3281 /* Remove channel if this is last client leaving the channel, unless
3282 the channel is permanent. */
3283 if (server->server_type != SILC_SERVER &&
3284 silc_hash_table_count(channel->user_list) < 2) {
3285 silc_server_channel_delete(server, channel);
3289 silc_hash_table_del(client->channels, channel);
3290 silc_hash_table_del(channel->user_list, client);
3291 channel->user_count--;
3293 /* If there is no global users on the channel anymore mark the channel
3294 as local channel. Do not check if the removed client is local client. */
3295 if (server->server_type == SILC_SERVER && channel->global_users &&
3296 chl->client->router && !silc_server_channel_has_global(channel))
3297 channel->global_users = FALSE;
3299 memset(chl, 'A', sizeof(*chl));
3302 /* Update statistics */
3303 if (SILC_IS_LOCAL(client))
3304 server->stat.my_chanclients--;
3305 if (server->server_type == SILC_ROUTER) {
3306 server->stat.cell_chanclients--;
3307 server->stat.chanclients--;
3310 /* If there is not at least one local user on the channel then we don't
3311 need the channel entry anymore, we can remove it safely, unless the
3312 channel is permanent channel */
3313 if (server->server_type == SILC_SERVER &&
3314 !silc_server_channel_has_local(channel)) {
3315 /* Notify about leaving client if this channel has global users. */
3316 if (notify && channel->global_users)
3317 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3318 SILC_NOTIFY_TYPE_SIGNOFF,
3319 signoff_message ? 2 : 1,
3320 clidp->data, silc_buffer_len(clidp),
3321 signoff_message, signoff_message ?
3322 strlen(signoff_message) : 0);
3324 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3325 silc_server_channel_delete(server, channel);
3329 /* Send notify to channel about client leaving SILC and channel too */
3331 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3332 SILC_NOTIFY_TYPE_SIGNOFF,
3333 signoff_message ? 2 : 1,
3334 clidp->data, silc_buffer_len(clidp),
3335 signoff_message, signoff_message ?
3336 strlen(signoff_message) : 0);
3338 if (killed && clidp) {
3339 /* Remove the client from channel's invite list */
3340 if (channel->invite_list &&
3341 silc_hash_table_count(channel->invite_list)) {
3343 SilcArgumentPayload iargs;
3344 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3345 silc_buffer_len(clidp), 3);
3346 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3347 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3348 silc_buffer_free(ab);
3349 silc_argument_payload_free(iargs);
3353 /* Don't create keys if we are shutting down */
3354 if (server->server_shutdown)
3357 /* Re-generate channel key if needed */
3358 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3359 if (!silc_server_create_channel_key(server, channel, 0))
3362 /* Send the channel key to the channel. The key of course is not sent
3363 to the client who was removed from the channel. */
3364 silc_server_send_channel_key(server, client->connection, channel,
3365 server->server_type == SILC_ROUTER ?
3366 FALSE : !server->standalone);
3370 silc_hash_table_list_reset(&htl);
3372 silc_buffer_free(clidp);
3375 /* Removes client from one channel. This is used for example when client
3376 calls LEAVE command to remove itself from the channel. Returns TRUE
3377 if channel still exists and FALSE if the channel is removed when
3378 last client leaves the channel. If `notify' is FALSE notify messages
3381 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3382 SilcPacketStream sock,
3383 SilcChannelEntry channel,
3384 SilcClientEntry client,
3387 SilcChannelClientEntry chl;
3390 SILC_LOG_DEBUG(("Removing %s from channel %s",
3391 silc_id_render(client->id, SILC_ID_CLIENT),
3392 channel->channel_name));
3394 /* Get the entry to the channel, if this client is not on the channel
3396 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3399 /* Remove channel if this is last client leaving the channel, unless
3400 the channel is permanent. */
3401 if (server->server_type != SILC_SERVER &&
3402 silc_hash_table_count(channel->user_list) < 2) {
3403 silc_server_channel_delete(server, channel);
3407 silc_hash_table_del(client->channels, channel);
3408 silc_hash_table_del(channel->user_list, client);
3409 channel->user_count--;
3411 /* If there is no global users on the channel anymore mark the channel
3412 as local channel. Do not check if the client is local client. */
3413 if (server->server_type == SILC_SERVER && channel->global_users &&
3414 chl->client->router && !silc_server_channel_has_global(channel))
3415 channel->global_users = FALSE;
3417 memset(chl, 'O', sizeof(*chl));
3420 /* Update statistics */
3421 if (SILC_IS_LOCAL(client))
3422 server->stat.my_chanclients--;
3423 if (server->server_type == SILC_ROUTER) {
3424 server->stat.cell_chanclients--;
3425 server->stat.chanclients--;
3428 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3432 /* If there is not at least one local user on the channel then we don't
3433 need the channel entry anymore, we can remove it safely, unless the
3434 channel is permanent channel */
3435 if (server->server_type == SILC_SERVER &&
3436 !silc_server_channel_has_local(channel)) {
3437 /* Notify about leaving client if this channel has global users. */
3438 if (notify && channel->global_users)
3439 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3440 SILC_NOTIFY_TYPE_LEAVE, 1,
3441 clidp->data, silc_buffer_len(clidp));
3443 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3444 silc_server_channel_delete(server, channel);
3445 silc_buffer_free(clidp);
3449 /* Send notify to channel about client leaving the channel */
3451 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3452 SILC_NOTIFY_TYPE_LEAVE, 1,
3453 clidp->data, silc_buffer_len(clidp));
3455 silc_buffer_free(clidp);
3459 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3460 function may be used only by router. In real SILC network all channels
3461 are created by routers thus this function is never used by normal
3464 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3465 SilcServerID *router_id,
3471 SilcChannelID *channel_id;
3472 SilcChannelEntry entry;
3473 SilcCipher send_key, receive_key;
3476 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3479 cipher = SILC_DEFAULT_CIPHER;
3481 hmac = SILC_DEFAULT_HMAC;
3483 /* Allocate cipher */
3484 if (!silc_cipher_alloc(cipher, &send_key))
3486 if (!silc_cipher_alloc(cipher, &receive_key)) {
3487 silc_cipher_free(send_key);
3492 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3493 silc_cipher_free(send_key);
3494 silc_cipher_free(receive_key);
3498 channel_name = strdup(channel_name);
3500 /* Create the channel ID */
3501 if (!silc_id_create_channel_id(server, router_id, server->rng,
3503 silc_free(channel_name);
3504 silc_cipher_free(send_key);
3505 silc_cipher_free(receive_key);
3506 silc_hmac_free(newhmac);
3510 /* Create the channel */
3511 entry = silc_idlist_add_channel(server->local_list, channel_name,
3512 SILC_CHANNEL_MODE_NONE, channel_id,
3513 NULL, send_key, receive_key, newhmac);
3515 silc_free(channel_name);
3516 silc_cipher_free(send_key);
3517 silc_cipher_free(receive_key);
3518 silc_hmac_free(newhmac);
3519 silc_free(channel_id);
3523 entry->cipher = strdup(cipher);
3524 entry->hmac_name = strdup(hmac);
3526 /* Now create the actual key material */
3527 if (!silc_server_create_channel_key(server, entry,
3528 silc_cipher_get_key_len(send_key) / 8)) {
3529 silc_idlist_del_channel(server->local_list, entry);
3533 /* Notify other routers about the new channel. We send the packet
3534 to our primary route. */
3536 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3537 channel_name, entry->id,
3538 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3541 /* Distribute to backup routers */
3542 if (broadcast && server->server_type == SILC_ROUTER) {
3544 unsigned char cid[32];
3545 SilcUInt32 name_len = strlen(channel_name);
3548 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3549 packet = silc_channel_payload_encode(channel_name, name_len,
3550 cid, id_len, entry->mode);
3551 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3552 packet->data, silc_buffer_len(packet), FALSE,
3554 silc_buffer_free(packet);
3557 server->stat.my_channels++;
3558 if (server->server_type == SILC_ROUTER) {
3559 server->stat.channels++;
3560 server->stat.cell_channels++;
3561 entry->users_resolved = TRUE;
3567 /* Same as above but creates the channel with Channel ID `channel_id. */
3570 silc_server_create_new_channel_with_id(SilcServer server,
3574 SilcChannelID *channel_id,
3577 SilcChannelEntry entry;
3578 SilcCipher send_key, receive_key;
3581 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3584 cipher = SILC_DEFAULT_CIPHER;
3586 hmac = SILC_DEFAULT_HMAC;
3588 /* Allocate cipher */
3589 if (!silc_cipher_alloc(cipher, &send_key))
3591 if (!silc_cipher_alloc(cipher, &receive_key)) {
3592 silc_cipher_free(send_key);
3597 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3598 silc_cipher_free(send_key);
3599 silc_cipher_free(receive_key);
3603 channel_name = strdup(channel_name);
3605 /* Create the channel */
3606 entry = silc_idlist_add_channel(server->local_list, channel_name,
3607 SILC_CHANNEL_MODE_NONE, channel_id,
3608 NULL, send_key, receive_key, newhmac);
3610 silc_cipher_free(send_key);
3611 silc_cipher_free(receive_key);
3612 silc_hmac_free(newhmac);
3613 silc_free(channel_name);
3617 /* Now create the actual key material */
3618 if (!silc_server_create_channel_key(server, entry,
3619 silc_cipher_get_key_len(send_key) / 8)) {
3620 silc_idlist_del_channel(server->local_list, entry);
3624 /* Notify other routers about the new channel. We send the packet
3625 to our primary route. */
3627 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3628 channel_name, entry->id,
3629 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3632 /* Distribute to backup routers */
3633 if (broadcast && server->server_type == SILC_ROUTER) {
3635 unsigned char cid[32];
3636 SilcUInt32 name_len = strlen(channel_name);
3639 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3640 packet = silc_channel_payload_encode(channel_name, name_len,
3641 cid, id_len, entry->mode);
3642 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3643 packet->data, silc_buffer_len(packet), FALSE,
3645 silc_buffer_free(packet);
3648 server->stat.my_channels++;
3649 if (server->server_type == SILC_ROUTER) {
3650 server->stat.channels++;
3651 server->stat.cell_channels++;
3652 entry->users_resolved = TRUE;
3658 /* Channel's key re-key timeout callback. */
3660 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3662 SilcServer server = app_context;
3663 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3667 /* Return now if we are shutting down */
3668 if (server->server_shutdown)
3671 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3674 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3677 /* Generates new channel key. This is used to create the initial channel key
3678 but also to re-generate new key for channel. If `key_len' is provided
3679 it is the bytes of the key length. */
3681 SilcBool silc_server_create_channel_key(SilcServer server,
3682 SilcChannelEntry channel,
3686 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3689 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3690 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3694 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3696 if (!channel->send_key)
3697 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3698 channel->send_key = NULL;
3701 if (!channel->receive_key)
3702 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3703 silc_cipher_free(channel->send_key);
3704 channel->send_key = channel->receive_key = NULL;
3710 else if (channel->key_len)
3711 len = channel->key_len / 8;
3713 len = silc_cipher_get_key_len(channel->send_key) / 8;
3715 /* Create channel key */
3716 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3719 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3720 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3722 /* Remove old key if exists */
3724 memset(channel->key, 0, channel->key_len / 8);
3725 silc_free(channel->key);
3729 channel->key_len = len * 8;
3730 channel->key = silc_memdup(channel_key, len);
3731 memset(channel_key, 0, sizeof(channel_key));
3733 /* Generate HMAC key from the channel key data and set it */
3735 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3736 memset(channel->key, 0, channel->key_len / 8);
3737 silc_free(channel->key);
3738 silc_cipher_free(channel->send_key);
3739 silc_cipher_free(channel->receive_key);
3740 channel->send_key = channel->receive_key = NULL;
3743 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3744 silc_hmac_set_key(channel->hmac, hash,
3745 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3746 memset(hash, 0, sizeof(hash));
3748 if (server->server_type == SILC_ROUTER) {
3749 if (!channel->rekey)
3750 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3751 channel->rekey->channel = channel;
3752 channel->rekey->key_len = key_len;
3753 if (channel->rekey->task)
3754 silc_schedule_task_del(server->schedule, channel->rekey->task);
3756 channel->rekey->task =
3757 silc_schedule_task_add_timeout(server->schedule,
3758 silc_server_channel_key_rekey,
3759 (void *)channel->rekey,
3760 server->config->channel_rekey_secs, 0);
3766 /* Saves the channel key found in the encoded `key_payload' buffer. This
3767 function is used when we receive Channel Key Payload and also when we're
3768 processing JOIN command reply. Returns entry to the channel. */
3770 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3771 SilcBuffer key_payload,
3772 SilcChannelEntry channel)
3774 SilcChannelKeyPayload payload = NULL;
3776 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3780 /* Decode channel key payload */
3781 payload = silc_channel_key_payload_parse(key_payload->data,
3782 silc_buffer_len(key_payload));
3784 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3789 /* Get the channel entry */
3792 /* Get channel ID */
3793 tmp = silc_channel_key_get_id(payload, &tmp_len);
3794 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3799 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3801 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3803 if (server->server_type == SILC_ROUTER)
3804 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3805 silc_id_render(&id, SILC_ID_CHANNEL)));
3811 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3813 tmp = silc_channel_key_get_key(payload, &tmp_len);
3819 cipher = silc_channel_key_get_cipher(payload, NULL);
3825 /* Remove old key if exists */
3827 memset(channel->key, 0, channel->key_len / 8);
3828 silc_free(channel->key);
3829 silc_cipher_free(channel->send_key);
3830 silc_cipher_free(channel->receive_key);
3833 /* Create new cipher */
3834 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3835 channel->send_key = NULL;
3839 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3840 silc_cipher_free(channel->send_key);
3841 channel->send_key = channel->receive_key = NULL;
3846 if (channel->cipher)
3847 silc_free(channel->cipher);
3848 channel->cipher = strdup(cipher);
3851 channel->key_len = tmp_len * 8;
3852 channel->key = silc_memdup(tmp, tmp_len);
3853 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3854 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3856 /* Generate HMAC key from the channel key data and set it */
3858 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3859 memset(channel->key, 0, channel->key_len / 8);
3860 silc_free(channel->key);
3861 silc_cipher_free(channel->send_key);
3862 silc_cipher_free(channel->receive_key);
3863 channel->send_key = channel->receive_key = NULL;
3866 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3867 silc_hmac_set_key(channel->hmac, hash,
3868 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3870 memset(hash, 0, sizeof(hash));
3871 memset(tmp, 0, tmp_len);
3873 if (server->server_type == SILC_ROUTER) {
3874 if (!channel->rekey)
3875 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3876 channel->rekey->channel = channel;
3877 if (channel->rekey->task)
3878 silc_schedule_task_del(server->schedule, channel->rekey->task);
3880 channel->rekey->task =
3881 silc_schedule_task_add_timeout(server->schedule,
3882 silc_server_channel_key_rekey,
3883 (void *)channel->rekey,
3884 server->config->channel_rekey_secs, 0);
3889 silc_channel_key_payload_free(payload);
3894 /* Returns assembled of all servers in the given ID list. The packet's
3895 form is dictated by the New ID payload. */
3897 static void silc_server_announce_get_servers(SilcServer server,
3898 SilcServerEntry remote,
3900 SilcBuffer *servers,
3901 unsigned long creation_time)
3904 SilcIDCacheEntry id_cache;
3905 SilcServerEntry entry;
3908 /* Go through all clients in the list */
3909 if (silc_idcache_get_all(id_list->servers, &list)) {
3910 silc_list_start(list);
3911 while ((id_cache = silc_list_get(list))) {
3912 entry = (SilcServerEntry)id_cache->context;
3914 /* Do not announce the one we've sending our announcements and
3915 do not announce ourself. Also check the creation time if it's
3917 if ((entry == remote) || (entry == server->id_entry) ||
3918 (creation_time && entry->data.created < creation_time))
3921 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3923 *servers = silc_buffer_realloc(*servers,
3925 silc_buffer_truelen((*servers)) +
3926 silc_buffer_len(idp) :
3927 silc_buffer_len(idp)));
3928 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3929 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
3930 silc_buffer_pull(*servers, silc_buffer_len(idp));
3931 silc_buffer_free(idp);
3937 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3943 p = silc_notify_payload_encode(notify, argc, ap);
3949 /* This function is used by router to announce existing servers to our
3950 primary router when we've connected to it. If `creation_time' is non-zero
3951 then only the servers that has been created after the `creation_time'
3952 will be announced. */
3954 void silc_server_announce_servers(SilcServer server, SilcBool global,
3955 unsigned long creation_time,
3956 SilcPacketStream remote)
3958 SilcBuffer servers = NULL;
3960 SILC_LOG_DEBUG(("Announcing servers"));
3962 /* Get servers in local list */
3963 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3964 server->local_list, &servers,
3968 /* Get servers in global list */
3969 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3970 server->global_list, &servers,
3974 silc_buffer_push(servers, servers->data - servers->head);
3975 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
3977 /* Send the packet */
3978 silc_server_packet_send(server, remote,
3979 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3980 servers->data, silc_buffer_len(servers));
3982 silc_buffer_free(servers);
3986 /* Returns assembled packet of all clients in the given ID list. The
3987 packet's form is dictated by the New ID Payload. */
3989 static void silc_server_announce_get_clients(SilcServer server,
3991 SilcBuffer *clients,
3993 unsigned long creation_time)
3996 SilcIDCacheEntry id_cache;
3997 SilcClientEntry client;
4000 unsigned char mode[4];
4002 /* Go through all clients in the list */
4003 if (silc_idcache_get_all(id_list->clients, &list)) {
4004 silc_list_start(list);
4005 while ((id_cache = silc_list_get(list))) {
4006 client = (SilcClientEntry)id_cache->context;
4008 if (creation_time && client->data.created < creation_time)
4010 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4012 if (!client->connection && !client->router)
4015 SILC_LOG_DEBUG(("Announce Client ID %s",
4016 silc_id_render(client->id, SILC_ID_CLIENT)));
4018 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4020 *clients = silc_buffer_realloc(*clients,
4022 silc_buffer_truelen((*clients)) +
4023 silc_buffer_len(idp) :
4024 silc_buffer_len(idp)));
4025 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4026 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4027 silc_buffer_pull(*clients, silc_buffer_len(idp));
4029 SILC_PUT32_MSB(client->mode, mode);
4031 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4032 2, idp->data, silc_buffer_len(idp),
4034 *umodes = silc_buffer_realloc(*umodes,
4036 silc_buffer_truelen((*umodes)) +
4037 silc_buffer_len(tmp) :
4038 silc_buffer_len(tmp)));
4039 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4040 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4041 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4042 silc_buffer_free(tmp);
4044 silc_buffer_free(idp);
4049 /* This function is used to announce our existing clients to our router
4050 when we've connected to it. If `creation_time' is non-zero then only
4051 the clients that has been created after the `creation_time' will be
4054 void silc_server_announce_clients(SilcServer server,
4055 unsigned long creation_time,
4056 SilcPacketStream remote)
4058 SilcBuffer clients = NULL;
4059 SilcBuffer umodes = NULL;
4061 SILC_LOG_DEBUG(("Announcing clients"));
4063 /* Get clients in local list */
4064 silc_server_announce_get_clients(server, server->local_list,
4065 &clients, &umodes, creation_time);
4067 /* As router we announce our global list as well */
4068 if (server->server_type == SILC_ROUTER)
4069 silc_server_announce_get_clients(server, server->global_list,
4070 &clients, &umodes, creation_time);
4073 silc_buffer_push(clients, clients->data - clients->head);
4074 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4076 /* Send the packet */
4077 silc_server_packet_send(server, remote,
4078 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4079 clients->data, silc_buffer_len(clients));
4081 silc_buffer_free(clients);
4085 silc_buffer_push(umodes, umodes->data - umodes->head);
4086 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4088 /* Send the packet */
4089 silc_server_packet_send(server, remote,
4090 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4091 umodes->data, silc_buffer_len(umodes));
4093 silc_buffer_free(umodes);
4097 /* Returns channel's topic for announcing it */
4099 void silc_server_announce_get_channel_topic(SilcServer server,
4100 SilcChannelEntry channel,
4105 if (channel->topic) {
4106 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4107 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4109 silc_buffer_len(chidp),
4111 strlen(channel->topic));
4112 silc_buffer_free(chidp);
4116 /* Returns channel's invite and ban lists */
4118 void silc_server_announce_get_inviteban(SilcServer server,
4119 SilcChannelEntry channel,
4123 SilcBuffer list, idp, idp2, tmp2;
4125 SilcHashTableList htl;
4126 const unsigned char a[1] = { 0x03 };
4128 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4130 /* Encode invite list */
4131 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4132 list = silc_buffer_alloc_size(2);
4133 type = silc_hash_table_count(channel->invite_list);
4134 SILC_PUT16_MSB(type, list->data);
4135 silc_hash_table_list(channel->invite_list, &htl);
4136 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4137 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4139 silc_hash_table_list_reset(&htl);
4141 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4143 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4144 idp->data, silc_buffer_len(idp),
4145 channel->channel_name,
4146 strlen(channel->channel_name),
4147 idp2->data, silc_buffer_len(idp2),
4149 list->data, silc_buffer_len(list));
4150 silc_buffer_free(idp2);
4151 silc_buffer_free(list);
4154 /* Encode ban list */
4155 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4156 list = silc_buffer_alloc_size(2);
4157 type = silc_hash_table_count(channel->ban_list);
4158 SILC_PUT16_MSB(type, list->data);
4159 silc_hash_table_list(channel->ban_list, &htl);
4160 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4161 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4163 silc_hash_table_list_reset(&htl);
4166 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4167 idp->data, silc_buffer_len(idp),
4169 list->data, silc_buffer_len(list));
4170 silc_buffer_free(list);
4173 silc_buffer_free(idp);
4176 /* Returns assembled packets for channel users of the `channel'. */
4178 void silc_server_announce_get_channel_users(SilcServer server,
4179 SilcChannelEntry channel,
4180 SilcBuffer *channel_modes,
4181 SilcBuffer *channel_users,
4182 SilcBuffer *channel_users_modes)
4184 SilcChannelClientEntry chl;
4185 SilcHashTableList htl;
4186 SilcBuffer chidp, clidp, csidp;
4187 SilcBuffer tmp, fkey = NULL, chpklist;
4189 unsigned char mode[4], ulimit[4];
4192 SILC_LOG_DEBUG(("Start"));
4194 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4195 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4196 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4199 SILC_PUT32_MSB(channel->mode, mode);
4200 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4201 SILC_PUT32_MSB(channel->user_limit, ulimit);
4202 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4203 if (channel->founder_key)
4204 fkey = silc_public_key_payload_encode(channel->founder_key);
4206 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4208 silc_buffer_len(csidp),
4211 hmac, hmac ? strlen(hmac) : 0,
4212 channel->passphrase,
4213 channel->passphrase ?
4214 strlen(channel->passphrase) : 0,
4215 fkey ? fkey->data : NULL,
4216 fkey ? silc_buffer_len(fkey) : 0,
4217 chpklist ? chpklist->data : NULL,
4219 silc_buffer_len(chpklist) : 0,
4221 SILC_CHANNEL_MODE_ULIMIT ?
4224 SILC_CHANNEL_MODE_ULIMIT ?
4225 sizeof(ulimit) : 0));
4226 len = silc_buffer_len(tmp);
4228 silc_buffer_realloc(*channel_modes,
4230 silc_buffer_truelen((*channel_modes)) + len : len));
4231 silc_buffer_pull_tail(*channel_modes,
4232 ((*channel_modes)->end -
4233 (*channel_modes)->data));
4234 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4235 silc_buffer_pull(*channel_modes, len);
4236 silc_buffer_free(tmp);
4237 silc_buffer_free(fkey);
4240 /* Now find all users on the channel */
4241 silc_hash_table_list(channel->user_list, &htl);
4242 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4243 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4245 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4249 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4251 silc_buffer_len(clidp),
4253 silc_buffer_len(chidp));
4254 len = silc_buffer_len(tmp);
4256 silc_buffer_realloc(*channel_users,
4258 silc_buffer_truelen((*channel_users)) + len : len));
4259 silc_buffer_pull_tail(*channel_users,
4260 ((*channel_users)->end -
4261 (*channel_users)->data));
4263 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4264 silc_buffer_pull(*channel_users, len);
4265 silc_buffer_free(tmp);
4267 /* CUMODE notify for mode change on the channel */
4268 SILC_PUT32_MSB(chl->mode, mode);
4269 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4270 fkey = silc_public_key_payload_encode(channel->founder_key);
4271 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4273 silc_buffer_len(csidp),
4276 silc_buffer_len(clidp),
4277 fkey ? fkey->data : NULL,
4278 fkey ? silc_buffer_len(fkey) : 0);
4279 len = silc_buffer_len(tmp);
4280 *channel_users_modes =
4281 silc_buffer_realloc(*channel_users_modes,
4282 (*channel_users_modes ?
4283 silc_buffer_truelen((*channel_users_modes)) +
4285 silc_buffer_pull_tail(*channel_users_modes,
4286 ((*channel_users_modes)->end -
4287 (*channel_users_modes)->data));
4289 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4290 silc_buffer_pull(*channel_users_modes, len);
4291 silc_buffer_free(tmp);
4292 silc_buffer_free(fkey);
4294 silc_buffer_free(clidp);
4296 silc_hash_table_list_reset(&htl);
4297 silc_buffer_free(chidp);
4298 silc_buffer_free(csidp);
4301 /* Returns assembled packets for all channels and users on those channels
4302 from the given ID List. The packets are in the form dictated by the
4303 New Channel and New Channel User payloads. */
4305 void silc_server_announce_get_channels(SilcServer server,
4307 SilcBuffer *channels,
4308 SilcBuffer **channel_modes,
4309 SilcBuffer *channel_users,
4310 SilcBuffer **channel_users_modes,
4311 SilcUInt32 *channel_users_modes_c,
4312 SilcBuffer **channel_topics,
4313 SilcBuffer **channel_invites,
4314 SilcBuffer **channel_bans,
4315 SilcChannelID ***channel_ids,
4316 unsigned long creation_time)
4319 SilcIDCacheEntry id_cache;
4320 SilcChannelEntry channel;
4321 unsigned char cid[32];
4323 SilcUInt16 name_len;
4325 int i = *channel_users_modes_c;
4328 SILC_LOG_DEBUG(("Start"));
4330 /* Go through all channels in the list */
4331 if (silc_idcache_get_all(id_list->channels, &list)) {
4332 silc_list_start(list);
4333 while ((id_cache = silc_list_get(list))) {
4334 channel = (SilcChannelEntry)id_cache->context;
4336 if (creation_time && channel->created < creation_time)
4341 SILC_LOG_DEBUG(("Announce Channel ID %s",
4342 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4344 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4345 name_len = strlen(channel->channel_name);
4348 len = 4 + name_len + id_len + 4;
4350 silc_buffer_realloc(*channels,
4352 silc_buffer_truelen((*channels)) +
4354 silc_buffer_pull_tail(*channels,
4355 ((*channels)->end - (*channels)->data));
4356 silc_buffer_format(*channels,
4357 SILC_STR_UI_SHORT(name_len),
4358 SILC_STR_UI_XNSTRING(channel->channel_name,
4360 SILC_STR_UI_SHORT(id_len),
4361 SILC_STR_UI_XNSTRING(cid, id_len),
4362 SILC_STR_UI_INT(channel->mode),
4364 silc_buffer_pull(*channels, len);
4367 if (creation_time && channel->updated < creation_time)
4373 /* Channel user modes */
4374 *channel_users_modes = silc_realloc(*channel_users_modes,
4375 sizeof(**channel_users_modes) *
4377 (*channel_users_modes)[i] = NULL;
4378 *channel_modes = silc_realloc(*channel_modes,
4379 sizeof(**channel_modes) * (i + 1));
4380 (*channel_modes)[i] = NULL;
4381 *channel_ids = silc_realloc(*channel_ids,
4382 sizeof(**channel_ids) * (i + 1));
4383 (*channel_ids)[i] = NULL;
4384 silc_server_announce_get_channel_users(server, channel,
4385 &(*channel_modes)[i],
4387 &(*channel_users_modes)[i]);
4388 (*channel_ids)[i] = channel->id;
4390 /* Channel's topic */
4391 *channel_topics = silc_realloc(*channel_topics,
4392 sizeof(**channel_topics) * (i + 1));
4393 (*channel_topics)[i] = NULL;
4394 silc_server_announce_get_channel_topic(server, channel,
4395 &(*channel_topics)[i]);
4397 /* Channel's invite and ban list */
4398 *channel_invites = silc_realloc(*channel_invites,
4399 sizeof(**channel_invites) * (i + 1));
4400 (*channel_invites)[i] = NULL;
4401 *channel_bans = silc_realloc(*channel_bans,
4402 sizeof(**channel_bans) * (i + 1));
4403 (*channel_bans)[i] = NULL;
4404 silc_server_announce_get_inviteban(server, channel,
4405 &(*channel_invites)[i],
4406 &(*channel_bans)[i]);
4408 (*channel_users_modes_c)++;
4416 /* This function is used to announce our existing channels to our router
4417 when we've connected to it. This also announces the users on the
4418 channels to the router. If the `creation_time' is non-zero only the
4419 channels that was created after the `creation_time' are announced.
4420 Note that the channel users are still announced even if the `creation_time'
4423 void silc_server_announce_channels(SilcServer server,
4424 unsigned long creation_time,
4425 SilcPacketStream remote)
4427 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4428 SilcBuffer *channel_users_modes = NULL;
4429 SilcBuffer *channel_topics = NULL;
4430 SilcBuffer *channel_invites = NULL;
4431 SilcBuffer *channel_bans = NULL;
4432 SilcUInt32 channel_users_modes_c = 0;
4433 SilcChannelID **channel_ids = NULL;
4435 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4437 /* Get channels and channel users in local list */
4438 silc_server_announce_get_channels(server, server->local_list,
4439 &channels, &channel_modes,
4441 &channel_users_modes,
4442 &channel_users_modes_c,
4446 &channel_ids, creation_time);
4448 /* Get channels and channel users in global list */
4449 if (server->server_type != SILC_SERVER)
4450 silc_server_announce_get_channels(server, server->global_list,
4451 &channels, &channel_modes,
4453 &channel_users_modes,
4454 &channel_users_modes_c,
4458 &channel_ids, creation_time);
4461 silc_buffer_push(channels, channels->data - channels->head);
4462 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4464 /* Send the packet */
4465 silc_server_packet_send(server, remote,
4466 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4467 channels->data, silc_buffer_len(channels));
4469 silc_buffer_free(channels);
4472 if (channel_users) {
4473 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4474 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4475 silc_buffer_len(channel_users));
4477 /* Send the packet */
4478 silc_server_packet_send(server, remote,
4479 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4480 channel_users->data, silc_buffer_len(channel_users));
4482 silc_buffer_free(channel_users);
4485 if (channel_modes) {
4488 for (i = 0; i < channel_users_modes_c; i++) {
4489 if (!channel_modes[i])
4491 silc_buffer_push(channel_modes[i],
4492 channel_modes[i]->data -
4493 channel_modes[i]->head);
4494 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4495 silc_buffer_len(channel_modes[i]));
4496 silc_server_packet_send_dest(server, remote,
4497 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4498 channel_ids[i], SILC_ID_CHANNEL,
4499 channel_modes[i]->data,
4500 silc_buffer_len(channel_modes[i]));
4501 silc_buffer_free(channel_modes[i]);
4503 silc_free(channel_modes);
4506 if (channel_users_modes) {
4509 for (i = 0; i < channel_users_modes_c; i++) {
4510 if (!channel_users_modes[i])
4512 silc_buffer_push(channel_users_modes[i],
4513 channel_users_modes[i]->data -
4514 channel_users_modes[i]->head);
4515 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4516 silc_buffer_len(channel_users_modes[i]));
4517 silc_server_packet_send_dest(server, remote,
4518 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4519 channel_ids[i], SILC_ID_CHANNEL,
4520 channel_users_modes[i]->data,
4521 silc_buffer_len(channel_users_modes[i]));
4522 silc_buffer_free(channel_users_modes[i]);
4524 silc_free(channel_users_modes);
4527 if (channel_topics) {
4530 for (i = 0; i < channel_users_modes_c; i++) {
4531 if (!channel_topics[i])
4534 silc_buffer_push(channel_topics[i],
4535 channel_topics[i]->data -
4536 channel_topics[i]->head);
4537 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4538 silc_buffer_len(channel_topics[i]));
4539 silc_server_packet_send_dest(server, remote,
4540 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4541 channel_ids[i], SILC_ID_CHANNEL,
4542 channel_topics[i]->data,
4543 silc_buffer_len(channel_topics[i]));
4544 silc_buffer_free(channel_topics[i]);
4546 silc_free(channel_topics);
4549 if (channel_invites) {
4552 for (i = 0; i < channel_users_modes_c; i++) {
4553 if (!channel_invites[i])
4556 silc_buffer_push(channel_invites[i],
4557 channel_invites[i]->data -
4558 channel_invites[i]->head);
4559 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4560 silc_buffer_len(channel_invites[i]));
4561 silc_server_packet_send_dest(server, remote,
4562 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4563 channel_ids[i], SILC_ID_CHANNEL,
4564 channel_invites[i]->data,
4565 silc_buffer_len(channel_invites[i]));
4566 silc_buffer_free(channel_invites[i]);
4568 silc_free(channel_invites);
4574 for (i = 0; i < channel_users_modes_c; i++) {
4575 if (!channel_bans[i])
4578 silc_buffer_push(channel_bans[i],
4579 channel_bans[i]->data -
4580 channel_bans[i]->head);
4581 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4582 silc_buffer_len(channel_bans[i]));
4583 silc_server_packet_send_dest(server, remote,
4584 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4585 channel_ids[i], SILC_ID_CHANNEL,
4586 channel_bans[i]->data,
4587 silc_buffer_len(channel_bans[i]));
4588 silc_buffer_free(channel_bans[i]);
4590 silc_free(channel_bans);
4593 silc_free(channel_ids);
4596 /* Announces WATCH list. */
4598 void silc_server_announce_watches(SilcServer server,
4599 SilcPacketStream remote)
4601 SilcHashTableList htl;
4602 SilcBuffer buffer, idp, args, pkp;
4603 SilcClientEntry client;
4606 SILC_LOG_DEBUG(("Announcing watch list"));
4608 /* XXX because way we save the nicks (hash) we cannot announce them. */
4610 /* XXX we should send all public keys in one command if client is
4611 watching more than one key */
4612 silc_hash_table_list(server->watcher_list_pk, &htl);
4613 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4614 if (!client || !client->id)
4617 server->stat.commands_sent++;
4619 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4620 args = silc_buffer_alloc_size(2);
4621 silc_buffer_format(args,
4622 SILC_STR_UI_SHORT(1),
4624 pkp = silc_public_key_payload_encode(key);
4625 args = silc_argument_payload_encode_one(args, pkp->data,
4626 silc_buffer_len(pkp), 0x00);
4627 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4628 ++server->cmd_ident, 2,
4629 1, idp->data, silc_buffer_len(idp),
4631 silc_buffer_len(args));
4634 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4635 buffer->data, silc_buffer_len(buffer));
4637 silc_buffer_free(pkp);
4638 silc_buffer_free(args);
4639 silc_buffer_free(idp);
4640 silc_buffer_free(buffer);
4642 silc_hash_table_list_reset(&htl);
4645 /* Assembles user list and users mode list from the `channel'. */
4647 SilcBool silc_server_get_users_on_channel(SilcServer server,
4648 SilcChannelEntry channel,
4649 SilcBuffer *user_list,
4650 SilcBuffer *mode_list,
4651 SilcUInt32 *user_count)
4653 SilcChannelClientEntry chl;
4654 SilcHashTableList htl;
4655 SilcBuffer client_id_list;
4656 SilcBuffer client_mode_list;
4658 SilcUInt32 list_count = 0, len = 0;
4660 if (!silc_hash_table_count(channel->user_list))
4663 silc_hash_table_list(channel->user_list, &htl);
4664 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4665 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4666 silc_hash_table_list_reset(&htl);
4668 client_id_list = silc_buffer_alloc(len);
4670 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4671 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4672 silc_buffer_pull_tail(client_mode_list,
4673 silc_buffer_truelen(client_mode_list));
4675 silc_hash_table_list(channel->user_list, &htl);
4676 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4678 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4679 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4680 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4681 silc_buffer_free(idp);
4683 /* Client's mode on channel */
4684 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4685 silc_buffer_pull(client_mode_list, 4);
4689 silc_hash_table_list_reset(&htl);
4690 silc_buffer_push(client_id_list,
4691 client_id_list->data - client_id_list->head);
4692 silc_buffer_push(client_mode_list,
4693 client_mode_list->data - client_mode_list->head);
4695 *user_list = client_id_list;
4696 *mode_list = client_mode_list;
4697 *user_count = list_count;
4701 /* Saves users and their modes to the `channel'. */
4703 void silc_server_save_users_on_channel(SilcServer server,
4704 SilcPacketStream sock,
4705 SilcChannelEntry channel,
4706 SilcClientID *noadd,
4707 SilcBuffer user_list,
4708 SilcBuffer mode_list,
4709 SilcUInt32 user_count)
4715 SilcClientEntry client;
4716 SilcIDCacheEntry cache;
4717 SilcChannelClientEntry chl;
4719 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4720 channel->channel_name));
4722 for (i = 0; i < user_count; i++) {
4724 SILC_GET16_MSB(idp_len, user_list->data + 2);
4726 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4728 silc_buffer_pull(user_list, idp_len);
4731 SILC_GET32_MSB(mode, mode_list->data);
4732 silc_buffer_pull(mode_list, 4);
4734 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4739 /* Check if we have this client cached already. */
4740 client = silc_idlist_find_client_by_id(server->local_list,
4742 server->server_type, &cache);
4744 client = silc_idlist_find_client_by_id(server->global_list,
4746 server->server_type, &cache);
4748 /* If router did not find such Client ID in its lists then this must
4749 be bogus client or some router in the net is buggy. */
4750 if (server->server_type != SILC_SERVER)
4753 /* We don't have that client anywhere, add it. The client is added
4754 to global list since server didn't have it in the lists so it must be
4756 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4757 silc_id_dup(&id.u.client_id,
4759 silc_packet_get_context(sock),
4762 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4766 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4769 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4770 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4771 "%s", channel->channel_name));
4775 if (!silc_server_client_on_channel(client, channel, &chl)) {
4776 /* Client was not on the channel, add it. */
4777 chl = silc_calloc(1, sizeof(*chl));
4778 chl->client = client;
4780 chl->channel = channel;
4781 silc_hash_table_add(channel->user_list, chl->client, chl);
4782 silc_hash_table_add(client->channels, chl->channel, chl);
4783 channel->user_count++;
4791 /* Saves channels and channels user modes to the `client'. Removes
4792 the client from those channels that are not sent in the list but
4795 void silc_server_save_user_channels(SilcServer server,
4796 SilcPacketStream sock,
4797 SilcClientEntry client,
4798 SilcBuffer channels,
4799 SilcBuffer channels_user_modes)
4802 SilcUInt32 *chumodes;
4803 SilcChannelPayload entry;
4804 SilcChannelEntry channel;
4805 SilcChannelID channel_id;
4806 SilcChannelClientEntry chl;
4807 SilcHashTable ht = NULL;
4808 SilcHashTableList htl;
4812 if (!channels || !channels_user_modes ||
4813 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4816 ch = silc_channel_payload_parse_list(channels->data,
4817 silc_buffer_len(channels));
4818 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4820 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4821 NULL, NULL, NULL, TRUE);
4822 silc_dlist_start(ch);
4823 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4824 /* Check if we have this channel, and add it if we don't have it.
4825 Also add the client on the channel unless it is there already. */
4826 if (!silc_channel_get_id_parse(entry, &channel_id))
4828 channel = silc_idlist_find_channel_by_id(server->local_list,
4831 channel = silc_idlist_find_channel_by_id(server->global_list,
4834 if (server->server_type != SILC_SERVER) {
4839 /* We don't have that channel anywhere, add it. */
4840 name = silc_channel_get_name(entry, NULL);
4841 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4842 silc_id_dup(&channel_id,
4844 server->router, NULL, NULL, 0);
4851 channel->mode = silc_channel_get_mode(entry);
4853 /* Add the client on the channel */
4854 if (!silc_server_client_on_channel(client, channel, &chl)) {
4855 chl = silc_calloc(1, sizeof(*chl));
4856 chl->client = client;
4857 chl->mode = chumodes[i++];
4858 chl->channel = channel;
4859 silc_hash_table_add(channel->user_list, chl->client, chl);
4860 silc_hash_table_add(client->channels, chl->channel, chl);
4861 channel->user_count++;
4864 chl->mode = chumodes[i++];
4867 silc_hash_table_add(ht, channel, channel);
4869 silc_channel_payload_list_free(ch);
4870 silc_free(chumodes);
4874 /* Go through the list again and remove client from channels that
4875 are no part of the list. */
4877 silc_hash_table_list(client->channels, &htl);
4878 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4879 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4880 silc_hash_table_del(chl->channel->user_list, chl->client);
4881 silc_hash_table_del(chl->client->channels, chl->channel);
4885 silc_hash_table_list_reset(&htl);
4886 silc_hash_table_free(ht);
4888 silc_hash_table_list(client->channels, &htl);
4889 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4890 silc_hash_table_del(chl->channel->user_list, chl->client);
4891 silc_hash_table_del(chl->client->channels, chl->channel);
4894 silc_hash_table_list_reset(&htl);
4898 /* Lookups route to the client indicated by the `id_data'. The connection
4899 object and internal data object is returned. Returns NULL if route
4900 could not be found to the client. If the `client_id' is specified then
4901 it is used and the `id_data' is ignored. */
4904 silc_server_get_client_route(SilcServer server,
4905 unsigned char *id_data,
4907 SilcClientID *client_id,
4908 SilcIDListData *idata,
4909 SilcClientEntry *client_entry)
4911 SilcClientID *id, clid;
4912 SilcClientEntry client;
4914 SILC_LOG_DEBUG(("Start"));
4917 *client_entry = NULL;
4919 /* Decode destination Client ID */
4921 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
4923 id = silc_id_dup(&clid, SILC_ID_CLIENT);
4925 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4928 /* If the destination belongs to our server we don't have to route
4929 the packet anywhere but to send it to the local destination. */
4930 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4934 /* If we are router and the client has router then the client is in
4935 our cell but not directly connected to us. */
4936 if (server->server_type == SILC_ROUTER && client->router) {
4937 /* We are of course in this case the client's router thus the route
4938 to the client is the server who owns the client. So, we will send
4939 the packet to that server. */
4941 *idata = (SilcIDListData)client->router;
4942 return client->router->connection;
4945 /* Seems that client really is directly connected to us */
4947 *idata = (SilcIDListData)client;
4949 *client_entry = client;
4950 return client->connection;
4953 /* Destination belongs to someone not in this server. If we are normal
4954 server our action is to send the packet to our router. */
4955 if (server->server_type != SILC_ROUTER && !server->standalone) {
4958 *idata = (SilcIDListData)server->router;
4959 return SILC_PRIMARY_ROUTE(server);
4962 /* We are router and we will perform route lookup for the destination
4963 and send the packet to fastest route. */
4964 if (server->server_type == SILC_ROUTER && !server->standalone) {
4965 /* Check first that the ID is valid */
4966 client = silc_idlist_find_client_by_id(server->global_list, id,
4969 SilcPacketStream dst_sock;
4971 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4974 if (idata && dst_sock)
4975 *idata = silc_packet_get_context(dst_sock);
4984 /* Encodes and returns channel list of channels the `client' has joined.
4985 Secret channels are not put to the list. */
4987 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4988 SilcClientEntry client,
4989 SilcBool get_private,
4990 SilcBool get_secret,
4991 SilcBuffer *user_mode_list)
4993 SilcBuffer buffer = NULL;
4994 SilcChannelEntry channel;
4995 SilcChannelClientEntry chl;
4996 SilcHashTableList htl;
4997 unsigned char cid[32];
4999 SilcUInt16 name_len;
5003 *user_mode_list = NULL;
5005 silc_hash_table_list(client->channels, &htl);
5006 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5007 channel = chl->channel;
5009 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5011 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5014 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5015 name_len = strlen(channel->channel_name);
5017 len = 4 + name_len + id_len + 4;
5018 buffer = silc_buffer_realloc(buffer,
5020 silc_buffer_truelen(buffer) + len : len));
5021 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5022 silc_buffer_format(buffer,
5023 SILC_STR_UI_SHORT(name_len),
5024 SILC_STR_DATA(channel->channel_name, name_len),
5025 SILC_STR_UI_SHORT(id_len),
5026 SILC_STR_DATA(cid, id_len),
5027 SILC_STR_UI_INT(chl->channel->mode),
5029 silc_buffer_pull(buffer, len);
5031 if (user_mode_list) {
5033 silc_buffer_realloc(*user_mode_list,
5035 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5036 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5037 (*user_mode_list)->data));
5038 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5039 silc_buffer_pull(*user_mode_list, 4);
5042 silc_hash_table_list_reset(&htl);
5045 silc_buffer_push(buffer, buffer->data - buffer->head);
5046 if (user_mode_list && *user_mode_list)
5047 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5048 (*user_mode_list)->head));
5053 /* Task callback used to retrieve network statistical information from
5054 router server once in a while. */
5056 SILC_TASK_CALLBACK(silc_server_get_stats)
5058 SilcServer server = (SilcServer)context;
5059 SilcBuffer idp, packet;
5061 if (!server->standalone) {
5062 SILC_LOG_DEBUG(("Retrieving stats from router"));
5063 server->stat.commands_sent++;
5064 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5066 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5067 ++server->cmd_ident, 1,
5069 silc_buffer_len(idp));
5070 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5071 SILC_PACKET_COMMAND, 0, packet->data,
5072 silc_buffer_len(packet));
5073 silc_buffer_free(packet);
5074 silc_buffer_free(idp);
5078 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,