5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2008 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 #include "serverincludes.h"
21 #include "server_internal.h"
23 /************************* Types and definitions ****************************/
25 SILC_TASK_CALLBACK(silc_server_get_stats);
26 SILC_TASK_CALLBACK(silc_server_connect_router);
27 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
28 SILC_TASK_CALLBACK(silc_server_do_rekey);
29 SILC_TASK_CALLBACK(silc_server_purge_expired_clients);
30 static void silc_server_accept_new_connection(SilcNetStatus status,
33 static void silc_server_packet_parse_type(SilcServer server,
34 SilcPacketStream sock,
36 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
40 /************************ Static utility functions **************************/
42 /* SKE public key verification callback */
45 silc_server_verify_key(SilcSKE ske,
46 SilcPublicKey public_key,
48 SilcSKEVerifyCbCompletion completion,
49 void *completion_context)
51 SilcPacketStream sock = context;
52 SilcUnknownEntry entry = silc_packet_get_context(sock);
54 SILC_LOG_DEBUG(("Verifying public key"));
56 if (silc_pkcs_get_type(public_key) != SILC_SKE_PK_TYPE_SILC) {
57 SILC_LOG_WARNING(("We don't support %s (%s) port %d public key type %d",
58 entry->hostname, entry->ip, entry->port,
59 silc_pkcs_get_type(public_key)));
60 completion(ske, SILC_SKE_STATUS_UNSUPPORTED_PUBLIC_KEY,
65 /* We accept all keys without explicit verification */
66 completion(ske, SILC_SKE_STATUS_OK, completion_context);
70 /************************ Packet engine callbacks ***************************/
72 /* Packet engine callback to receive a packet */
74 static SilcBool silc_server_packet_receive(SilcPacketEngine engine,
75 SilcPacketStream stream,
77 void *callback_context,
80 SilcServer server = callback_context;
81 SilcIDListData idata = stream_context;
86 /* Packets we do not handle */
87 switch (packet->type) {
88 case SILC_PACKET_HEARTBEAT:
89 case SILC_PACKET_SUCCESS:
90 case SILC_PACKET_FAILURE:
91 case SILC_PACKET_REJECT:
92 case SILC_PACKET_KEY_EXCHANGE:
93 case SILC_PACKET_KEY_EXCHANGE_1:
94 case SILC_PACKET_KEY_EXCHANGE_2:
95 case SILC_PACKET_REKEY_DONE:
96 case SILC_PACKET_CONNECTION_AUTH:
101 /* Only specific packets can come without source ID present. */
102 if ((!packet->src_id ||
103 !(idata->status & SILC_IDLIST_STATUS_REGISTERED)) &&
104 packet->type != SILC_PACKET_NEW_CLIENT &&
105 packet->type != SILC_PACKET_NEW_SERVER &&
106 packet->type != SILC_PACKET_RESUME_CLIENT &&
107 packet->type != SILC_PACKET_CONNECTION_AUTH_REQUEST &&
108 packet->type != SILC_PACKET_DISCONNECT)
111 /* NEW_CLIENT and NEW_SERVER are accepted only without source ID and
112 for unregistered connection. */
113 if (packet->src_id && (packet->type == SILC_PACKET_NEW_CLIENT ||
114 packet->type == SILC_PACKET_NEW_SERVER) &&
115 (idata->status & SILC_IDLIST_STATUS_REGISTERED))
118 /* Ignore packets from disabled connection */
119 if (idata->status & SILC_IDLIST_STATUS_DISABLED &&
120 packet->type != SILC_PACKET_HEARTBEAT &&
121 packet->type != SILC_PACKET_RESUME_ROUTER &&
122 packet->type != SILC_PACKET_REKEY)
125 /* Check that the the current client ID is same as in the client's packet. */
126 if (idata->conn_type == SILC_CONN_CLIENT) {
127 SilcClientEntry client = (SilcClientEntry)silc_packet_get_context(stream);
128 SilcClientID client_id;
130 if (client->id && packet->src_id &&
131 silc_id_str2id(packet->src_id, packet->src_id_len,
132 packet->src_id_type, &client_id, sizeof(client_id))) {
133 if (!SILC_ID_CLIENT_COMPARE(client->id, &client_id)) {
134 SILC_LOG_DEBUG(("Packet source is not same as sender, packet %s",
135 silc_get_packet_name(packet->type)));
141 if (server->server_type == SILC_ROUTER) {
142 /* Route the packet if it is not destined to us. Other ID types but
143 server are handled separately after processing them. */
144 if (packet->dst_id &&
145 !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
146 packet->dst_id_type == SILC_ID_SERVER &&
147 idata->conn_type != SILC_CONN_CLIENT &&
148 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
149 SilcPacketStream conn;
150 SilcServerID server_id;
152 silc_id_str2id(packet->dst_id, packet->dst_id_len, packet->dst_id_type,
153 &server_id, sizeof(server_id));
155 conn = silc_server_route_get(server, &server_id, SILC_ID_SERVER);
157 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
158 silc_id_render(&server_id, SILC_ID_SERVER)));
162 silc_server_packet_route(server, conn, packet);
163 silc_packet_free(packet);
168 /* Broadcast packet if it is marked as broadcast packet and it is
169 originated from router and we are router. */
170 if (server->server_type == SILC_ROUTER &&
171 idata->conn_type == SILC_CONN_ROUTER &&
172 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
173 /* Broadcast to our primary route */
174 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
176 /* If we have backup routers then we need to feed all broadcast
177 data to those servers. */
178 silc_server_backup_broadcast(server, stream, packet);
182 silc_server_packet_parse_type(server, stream, packet);
187 /* Packet engine callback to indicate end of stream */
189 static void silc_server_packet_eos(SilcPacketEngine engine,
190 SilcPacketStream stream,
191 void *callback_context,
192 void *stream_context)
194 SilcServer server = callback_context;
195 SilcIDListData idata = silc_packet_get_context(stream);
197 SILC_LOG_DEBUG(("End of stream received, sock %p", stream));
202 if (server->router_conn && server->router_conn->sock == stream &&
203 !server->router && server->standalone) {
204 if (idata->sconn->callback)
205 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
206 silc_server_create_connections(server);
207 silc_server_free_sock_user_data(server, stream, NULL);
209 /* If backup disconnected then mark that resuming will not be allowed */
210 if (server->server_type == SILC_ROUTER && !server->backup_router &&
211 idata->conn_type == SILC_CONN_SERVER) {
212 SilcServerEntry server_entry = (SilcServerEntry)idata;
213 if (server_entry->server_type == SILC_BACKUP_ROUTER)
214 server->backup_closed = TRUE;
217 if (idata->sconn->callback)
218 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
219 silc_server_free_sock_user_data(server, stream, NULL);
222 silc_server_close_connection(server, stream);
225 SILC_TASK_CALLBACK(silc_server_packet_error_timeout)
227 SilcServer server = app_context;
228 SilcPacketStream stream = context;
229 SilcIDListData idata = silc_packet_get_context(stream);
234 if (server->router_conn && server->router_conn->sock == stream &&
235 !server->router && server->standalone) {
236 silc_server_create_connections(server);
238 /* If backup disconnected then mark that resuming will not be allowed */
239 if (server->server_type == SILC_ROUTER && !server->backup_router &&
240 idata->conn_type == SILC_CONN_SERVER) {
241 SilcServerEntry server_entry = (SilcServerEntry)idata;
242 if (server_entry->server_type == SILC_BACKUP_ROUTER)
243 server->backup_closed = TRUE;
246 if (idata->sconn->callback)
247 (*idata->sconn->callback)(server, NULL, idata->sconn->callback_context);
248 silc_server_free_sock_user_data(server, stream, NULL);
251 silc_server_close_connection(server, stream);
254 /* Packet engine callback to indicate error */
256 static void silc_server_packet_error(SilcPacketEngine engine,
257 SilcPacketStream stream,
258 SilcPacketError error,
259 void *callback_context,
260 void *stream_context)
262 SilcServer server = callback_context;
263 SilcIDListData idata = silc_packet_get_context(stream);
264 SilcStream sock = silc_packet_stream_get_stream(stream);
268 SILC_LOG_DEBUG(("Packet error, sock %p", stream));
273 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
276 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
277 SILC_CONNTYPE_STRING(idata->conn_type),
278 silc_packet_error_string(error)));
280 if (!silc_packet_stream_is_valid(stream))
283 silc_schedule_task_add_timeout(server->schedule,
284 silc_server_packet_error_timeout,
288 /* Packet stream callbacks */
289 static SilcPacketCallbacks silc_server_stream_cbs =
291 silc_server_packet_receive,
292 silc_server_packet_eos,
293 silc_server_packet_error
296 /* Parses the packet type and calls what ever routines the packet type
297 requires. This is done for all incoming packets. */
299 static void silc_server_packet_parse_type(SilcServer server,
300 SilcPacketStream sock,
303 SilcPacketType type = packet->type;
304 SilcIDListData idata = silc_packet_get_context(sock);
306 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
307 silc_get_packet_name(type), packet->flags));
309 /* Parse the packet type */
311 case SILC_PACKET_NOTIFY:
313 * Received notify packet. Server can receive notify packets from
314 * router. Server then relays the notify messages to clients if needed.
316 if (packet->flags & SILC_PACKET_FLAG_LIST)
317 silc_server_notify_list(server, sock, packet);
319 silc_server_notify(server, sock, packet);
323 * Private Message packets
325 case SILC_PACKET_PRIVATE_MESSAGE:
327 * Received private message packet. The packet is coming from either
330 if (packet->flags & SILC_PACKET_FLAG_LIST)
332 idata->last_receive = time(NULL);
333 silc_server_private_message(server, sock, packet);
339 case SILC_PACKET_CHANNEL_MESSAGE:
341 * Received channel message. Channel messages are special packets
342 * (although probably most common ones) thus they are handled
345 if (packet->flags & SILC_PACKET_FLAG_LIST)
347 idata->last_receive = time(NULL);
348 silc_server_channel_message(server, sock, packet);
354 case SILC_PACKET_COMMAND:
356 * Recived command. Processes the command request and allocates the
357 * command context and calls the command.
359 if (packet->flags & SILC_PACKET_FLAG_LIST)
361 server->stat.commands_received++;
362 silc_server_command_process(server, sock, packet);
365 case SILC_PACKET_COMMAND_REPLY:
367 * Received command reply packet. Received command reply to command. It
368 * may be reply to command sent by us or reply to command sent by client
369 * that we've routed further.
371 if (packet->flags & SILC_PACKET_FLAG_LIST)
373 server->stat.commands_received++;
374 silc_server_command_reply(server, sock, packet);
377 case SILC_PACKET_DISCONNECT:
380 char *message = NULL;
381 const char *hostname, *ip;
383 if (packet->flags & SILC_PACKET_FLAG_LIST)
385 if (silc_buffer_len(&packet->buffer) < 1)
388 status = (SilcStatus)packet->buffer.data[0];
389 if (silc_buffer_len(&packet->buffer) > 1 &&
390 silc_utf8_valid(packet->buffer.data + 1,
391 silc_buffer_len(&packet->buffer) - 1))
392 message = silc_memdup(packet->buffer.data + 1,
393 silc_buffer_len(&packet->buffer) - 1);
395 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
396 NULL, &hostname, &ip, NULL))
399 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
400 silc_get_status_message(status), status,
401 message ? message : ""));
405 /* Do not switch to backup in case of error */
406 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
408 /* If backup disconnected then mark that resuming will not be allowed */
409 if (server->server_type == SILC_ROUTER && !server->backup_router &&
410 idata->conn_type == SILC_CONN_SERVER) {
411 SilcServerEntry server_entry = (SilcServerEntry)idata;
412 if (server_entry->server_type == SILC_BACKUP_ROUTER)
413 server->backup_closed = TRUE;
416 /* Handle the disconnection from our end too */
417 if (SILC_IS_LOCAL(idata))
418 silc_server_free_sock_user_data(server, sock, NULL);
419 silc_server_close_connection(server, sock);
420 server->backup_noswitch = FALSE;
424 case SILC_PACKET_CHANNEL_KEY:
426 * Received key for channel. As channels are created by the router
427 * the keys are as well. We will distribute the key to all of our
428 * locally connected clients on the particular channel. Router
429 * never receives this channel and thus is ignored.
431 if (packet->flags & SILC_PACKET_FLAG_LIST)
433 silc_server_channel_key(server, sock, packet);
436 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
438 * Private message key packet.
440 if (packet->flags & SILC_PACKET_FLAG_LIST)
442 silc_server_private_message_key(server, sock, packet);
445 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
447 * Connection authentication request packet. When we receive this packet
448 * we will send to the other end information about our mandatory
449 * authentication method for the connection. This packet maybe received
452 if (packet->flags & SILC_PACKET_FLAG_LIST)
454 silc_server_connection_auth_request(server, sock, packet);
457 case SILC_PACKET_NEW_ID:
459 * Received New ID packet. This includes some new ID that has been
460 * created. It may be for client, server or channel. This is the way
461 * to distribute information about new registered entities in the
464 if (packet->flags & SILC_PACKET_FLAG_LIST)
465 silc_server_new_id_list(server, sock, packet);
467 silc_server_new_id(server, sock, packet);
470 case SILC_PACKET_NEW_CLIENT:
472 * Received new client packet. This includes client information that
473 * we will use to create initial client ID. After creating new
474 * ID we will send it to the client.
476 if (packet->flags & SILC_PACKET_FLAG_LIST)
478 silc_server_new_client(server, sock, packet);
481 case SILC_PACKET_NEW_SERVER:
483 * Received new server packet. This includes Server ID and some other
484 * information that we may save. This is received after server has
487 if (packet->flags & SILC_PACKET_FLAG_LIST)
489 silc_server_new_server(server, sock, packet);
492 case SILC_PACKET_NEW_CHANNEL:
494 * Received new channel packet. Information about new channel in the
495 * network are distributed using this packet.
497 if (packet->flags & SILC_PACKET_FLAG_LIST)
498 silc_server_new_channel_list(server, sock, packet);
500 silc_server_new_channel(server, sock, packet);
503 case SILC_PACKET_HEARTBEAT:
505 * Received heartbeat.
507 if (packet->flags & SILC_PACKET_FLAG_LIST)
511 case SILC_PACKET_KEY_AGREEMENT:
513 * Received heartbeat.
515 if (packet->flags & SILC_PACKET_FLAG_LIST)
517 silc_server_key_agreement(server, sock, packet);
520 case SILC_PACKET_REKEY:
522 * Received re-key packet. The sender wants to regenerate the session
525 if (packet->flags & SILC_PACKET_FLAG_LIST)
527 silc_server_rekey(server, sock, packet);
530 case SILC_PACKET_FTP:
532 if (packet->flags & SILC_PACKET_FLAG_LIST)
534 silc_server_ftp(server, sock, packet);
537 case SILC_PACKET_RESUME_CLIENT:
539 if (packet->flags & SILC_PACKET_FLAG_LIST)
541 silc_server_resume_client(server, sock, packet);
544 case SILC_PACKET_RESUME_ROUTER:
545 /* Resume router packet received. This packet is received for backup
546 router resuming protocol. */
547 if (packet->flags & SILC_PACKET_FLAG_LIST)
549 silc_server_backup_resume_router(server, sock, packet);
553 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
558 /****************************** Server API **********************************/
560 /* Allocates a new SILC server object. This has to be done before the server
561 can be used. After allocation one must call silc_server_init to initialize
562 the server. The new allocated server object is returned to the new_server
565 SilcBool silc_server_alloc(SilcServer *new_server)
569 SILC_LOG_DEBUG(("Allocating new server object"));
571 server = silc_calloc(1, sizeof(*server));
574 server->server_type = SILC_SERVER;
575 server->standalone = TRUE;
576 server->local_list = silc_calloc(1, sizeof(*server->local_list));
577 if (!server->local_list)
579 server->global_list = silc_calloc(1, sizeof(*server->global_list));
580 if (!server->global_list)
582 server->pending_commands = silc_dlist_init();
583 if (!server->pending_commands)
585 server->listeners = silc_dlist_init();
586 if (!server->listeners)
588 server->repository = silc_skr_alloc();
589 if (!server->repository)
591 server->conns = silc_dlist_init();
594 server->expired_clients = silc_dlist_init();
595 if (!server->expired_clients)
598 *new_server = server;
603 /* Free's the SILC server object. This is called at the very end before
606 void silc_server_free(SilcServer server)
609 SilcIDCacheEntry cache;
610 SilcIDListData idata;
612 SILC_LOG_DEBUG(("Free server %p", server));
617 silc_server_backup_free(server);
618 silc_server_config_unref(&server->config_ref);
620 silc_rng_free(server->rng);
621 if (server->public_key)
622 silc_pkcs_public_key_free(server->public_key);
623 if (server->private_key)
624 silc_pkcs_private_key_free(server->private_key);
625 if (server->pending_commands)
626 silc_dlist_uninit(server->pending_commands);
627 if (server->id_entry) {
628 if (server->id_entry->data.sconn)
629 silc_schedule_task_del_by_context(server->schedule,
630 server->id_entry->data.sconn->sock);
631 silc_idlist_del_server(server->local_list, server->id_entry);
634 /* Delete all channels */
635 if (silc_idcache_get_all(server->local_list->channels, &list)) {
636 silc_list_start(list);
637 while ((cache = silc_list_get(list)))
638 silc_idlist_del_channel(server->local_list, cache->context);
640 if (silc_idcache_get_all(server->global_list->channels, &list)) {
641 silc_list_start(list);
642 while ((cache = silc_list_get(list)))
643 silc_idlist_del_channel(server->global_list, cache->context);
646 /* Delete all clients */
647 if (silc_idcache_get_all(server->local_list->clients, &list)) {
648 silc_list_start(list);
649 while ((cache = silc_list_get(list))) {
650 silc_schedule_task_del_by_context(server->schedule, cache->context);
651 silc_idlist_del_client(server->local_list, cache->context);
654 if (silc_idcache_get_all(server->global_list->clients, &list)) {
655 silc_list_start(list);
656 while ((cache = silc_list_get(list))) {
657 silc_schedule_task_del_by_context(server->schedule, cache->context);
658 silc_idlist_del_client(server->global_list, cache->context);
662 /* Delete all servers */
663 if (silc_idcache_get_all(server->local_list->servers, &list)) {
664 silc_list_start(list);
665 while ((cache = silc_list_get(list))) {
666 idata = (SilcIDListData)cache->context;
668 silc_schedule_task_del_by_context(server->schedule,
670 silc_idlist_del_server(server->local_list, cache->context);
673 if (silc_idcache_get_all(server->global_list->servers, &list)) {
674 while ((cache = silc_list_get(list))) {
675 idata = (SilcIDListData)cache->context;
677 silc_schedule_task_del_by_context(server->schedule,
679 silc_idlist_del_server(server->global_list, cache->context);
683 silc_schedule_task_del_by_context(server->schedule, server);
684 silc_schedule_uninit(server->schedule);
685 server->schedule = NULL;
687 silc_idcache_free(server->local_list->clients);
688 silc_idcache_free(server->local_list->servers);
689 silc_idcache_free(server->local_list->channels);
690 silc_idcache_free(server->global_list->clients);
691 silc_idcache_free(server->global_list->servers);
692 silc_idcache_free(server->global_list->channels);
693 silc_hash_table_free(server->watcher_list);
694 silc_hash_table_free(server->watcher_list_pk);
695 silc_hash_free(server->md5hash);
696 silc_hash_free(server->sha1hash);
698 silc_dlist_uninit(server->listeners);
699 silc_dlist_uninit(server->conns);
700 silc_dlist_uninit(server->expired_clients);
701 silc_skr_free(server->repository);
702 silc_packet_engine_stop(server->packet_engine);
704 silc_free(server->local_list);
705 silc_free(server->global_list);
706 silc_free(server->server_name);
709 silc_hmac_unregister_all();
710 silc_hash_unregister_all();
711 silc_cipher_unregister_all();
712 silc_pkcs_unregister_all();
715 /* Creates a new server listener. */
717 static SilcNetListener
718 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
720 SilcNetListener listener;
723 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
724 server->config->require_reverse_lookup,
726 silc_server_accept_new_connection, server);
728 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
736 /* Adds a secondary listener. */
738 SilcBool silc_server_init_secondary(SilcServer server)
740 SilcServerConfigServerInfoInterface *interface;
741 SilcNetListener listener;
743 for (interface = server->config->server_info->secondary; interface;
744 interface = interface->next) {
745 listener = silc_server_listen(server, interface->server_ip,
749 silc_dlist_add(server->listeners, listener);
755 /* Initializes the entire SILC server. This is called always before running
756 the server. This is called only once at the initialization of the program.
757 This binds the server to its listenning port. After this function returns
758 one should call silc_server_run to start the server. This returns TRUE
759 when everything is ok to run the server. Configuration file must be
760 read and parsed before calling this. */
762 SilcBool silc_server_init(SilcServer server)
765 SilcServerEntry id_entry;
766 SilcNetListener listener;
770 SILC_LOG_DEBUG(("Initializing server"));
772 server->starttime = time(NULL);
774 /* Take config object for us */
775 silc_server_config_ref(&server->config_ref, server->config,
779 /* Set debugging on if configured */
780 if (server->config->debug_string) {
781 silc_log_debug(TRUE);
782 silc_log_set_debug_string(server->config->debug_string);
784 #endif /* SILC_DEBUG */
786 /* Steal public and private key from the config object */
787 server->public_key = server->config->server_info->public_key;
788 server->private_key = server->config->server_info->private_key;
789 server->config->server_info->public_key = NULL;
790 server->config->server_info->private_key = NULL;
792 /* Register all configured ciphers, PKCS and hash functions. */
793 if (!silc_server_config_register_ciphers(server))
794 silc_cipher_register_default();
795 if (!silc_server_config_register_pkcs(server))
796 silc_pkcs_register_default();
797 if (!silc_server_config_register_hashfuncs(server))
798 silc_hash_register_default();
799 if (!silc_server_config_register_hmacs(server))
800 silc_hmac_register_default();
802 /* Initialize random number generator for the server. */
803 server->rng = silc_rng_alloc();
804 silc_rng_init(server->rng);
805 silc_rng_global_init(server->rng);
807 /* Initialize hash functions for server to use */
808 silc_hash_alloc("md5", &server->md5hash);
809 silc_hash_alloc("sha1", &server->sha1hash);
811 /* Initialize the scheduler */
812 server->schedule = silc_schedule_init(server->config->param.connections_max,
814 if (!server->schedule)
817 /* First, register log files configuration for error output */
818 silc_server_config_setlogfiles(server);
820 /* Initialize ID caches */
821 server->local_list->clients =
822 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
824 server->local_list->servers =
825 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
827 server->local_list->channels =
828 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
831 /* These are allocated for normal server as well as these hold some
832 global information that the server has fetched from its router. For
833 router these are used as they are supposed to be used on router. */
834 server->global_list->clients =
835 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
837 server->global_list->servers =
838 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
840 server->global_list->channels =
841 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
844 /* Init watcher lists */
845 server->watcher_list =
846 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
847 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
849 if (!server->watcher_list)
851 server->watcher_list_pk =
852 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
853 silc_hash_public_key_compare, NULL,
855 if (!server->watcher_list_pk)
858 /* Create TCP listener */
859 listener = silc_server_listen(
861 server->config->server_info->primary == NULL ? NULL :
862 server->config->server_info->primary->server_ip,
863 server->config->server_info->primary == NULL ? 0 :
864 server->config->server_info->primary->port);
867 silc_dlist_add(server->listeners, listener);
869 /* Create a Server ID for the server. */
870 port = silc_net_listener_get_port(listener, NULL);
871 ip = silc_net_listener_get_ip(listener, NULL);
872 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
873 server->config->server_info->primary->public_ip :
874 ip[0], port[0], server->rng, &id);
883 server->server_name = server->config->server_info->server_name;
884 server->config->server_info->server_name = NULL;
885 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
886 sizeof(server->id_string), &server->id_string_len);
888 /* Add ourselves to the server list. We don't have a router yet
889 beacuse we haven't established a route yet. It will be done later.
890 For now, NULL is sent as router. This allocates new entry to
893 silc_idlist_add_server(server->local_list, strdup(server->server_name),
895 silc_id_dup(server->id, SILC_ID_SERVER),
898 SILC_LOG_ERROR(("Could not add local server to cache"));
901 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
902 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
903 SILC_CONN_SERVER : SILC_CONN_ROUTER);
904 server->id_entry = id_entry;
906 /* Create secondary TCP listeners */
907 if (silc_server_init_secondary(server) == FALSE)
910 server->listenning = TRUE;
912 /* Create connections to configured routers. */
913 silc_server_create_connections(server);
915 /* If server connections has been configured then we must be router as
916 normal server cannot have server connections, only router connections. */
917 if (server->config->servers) {
918 SilcServerConfigServer *ptr = server->config->servers;
920 server->server_type = SILC_ROUTER;
922 if (ptr->backup_router) {
923 server->server_type = SILC_BACKUP_ROUTER;
924 server->backup_router = TRUE;
925 server->id_entry->server_type = SILC_BACKUP_ROUTER;
932 if (server->server_type != SILC_ROUTER) {
933 server->stat.servers = 1;
934 server->stat.cell_servers = 1;
936 server->stat.routers = 1;
939 /* If we are normal server we'll retrieve network statisticial information
940 once in a while from the router. */
941 if (server->server_type != SILC_ROUTER)
942 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
945 /* Start packet engine */
946 server->packet_engine =
947 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
948 &silc_server_stream_cbs, server);
949 if (!server->packet_engine)
952 /* Register client entry expiration timeout */
953 silc_schedule_task_add_timeout(server->schedule,
954 silc_server_purge_expired_clients, server,
957 /* Initialize HTTP server */
958 silc_server_http_init(server);
960 SILC_LOG_DEBUG(("Server initialized"));
962 /* We are done here, return succesfully */
966 silc_server_config_unref(&server->config_ref);
970 /* Task callback to close a socket connection after rehash */
972 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
974 SilcServer server = app_context;
975 SilcPacketStream sock = context;
976 SilcIDListData idata = silc_packet_get_context(sock);
977 const char *hostname;
980 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
981 NULL, &hostname, NULL, &port);
983 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
984 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
985 silc_schedule_task_del_by_context(server->schedule, sock);
986 silc_server_disconnect_remote(server, sock,
987 SILC_STATUS_ERR_BANNED_FROM_SERVER,
988 "This connection is removed from "
990 silc_server_free_sock_user_data(server, sock, NULL);
993 /* This function basically reads the config file again and switches the config
994 object pointed by the server object. After that, we have to fix various
995 things such as the server_name and the listening ports.
996 Keep in mind that we no longer have the root privileges at this point. */
998 SilcBool silc_server_rehash(SilcServer server)
1000 SilcServerConfig newconfig;
1002 SILC_LOG_INFO(("Rehashing server"));
1004 /* Reset the logging system */
1005 silc_log_quick(TRUE);
1006 silc_log_flush_all();
1008 /* Start the main rehash phase (read again the config file) */
1009 newconfig = silc_server_config_alloc(server->config_file, server);
1011 SILC_LOG_ERROR(("Rehash FAILED."));
1015 /* Fix the server_name field */
1016 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1017 silc_free(server->server_name);
1019 /* Check server name */
1020 server->server_name =
1021 silc_identifier_check(newconfig->server_info->server_name,
1022 strlen(newconfig->server_info->server_name),
1023 SILC_STRING_LOCALE, 256, NULL);
1024 if (!server->server_name) {
1025 SILC_LOG_ERROR(("Malformed server name string '%s'",
1026 server->config->server_info->server_name));
1030 /* Update the idcache list with a fresh pointer */
1031 silc_free(server->id_entry->server_name);
1032 server->id_entry->server_name = strdup(server->server_name);
1033 silc_idcache_update_by_context(server->local_list->servers,
1034 server->id_entry, NULL,
1035 strdup(server->id_entry->server_name),
1040 silc_server_config_setlogfiles(server);
1042 /* Change new key pair if necessary */
1043 if (newconfig->server_info->public_key &&
1044 !silc_pkcs_public_key_compare(server->public_key,
1045 newconfig->server_info->public_key)) {
1046 silc_pkcs_public_key_free(server->public_key);
1047 silc_pkcs_private_key_free(server->private_key);
1048 server->public_key = newconfig->server_info->public_key;
1049 server->private_key = newconfig->server_info->private_key;
1050 newconfig->server_info->public_key = NULL;
1051 newconfig->server_info->private_key = NULL;
1054 /* Check for unconfigured server and router connections and close
1055 connections that were unconfigured. */
1057 if (server->config->routers) {
1058 SilcServerConfigRouter *ptr;
1059 SilcServerConfigRouter *newptr;
1062 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1065 /* Check whether new config has this one too */
1066 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1067 if (silc_string_compare(newptr->host, ptr->host) &&
1068 newptr->port == ptr->port &&
1069 newptr->initiator == ptr->initiator) {
1075 if (!found && ptr->host) {
1076 /* Remove this connection */
1077 SilcPacketStream sock;
1078 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1079 ptr->host, ptr->port);
1081 silc_schedule_task_add_timeout(server->schedule,
1082 silc_server_rehash_close_connection,
1088 if (server->config->servers) {
1089 SilcServerConfigServer *ptr;
1090 SilcServerConfigServer *newptr;
1093 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1096 /* Check whether new config has this one too */
1097 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1098 if (silc_string_compare(newptr->host, ptr->host)) {
1104 if (!found && ptr->host) {
1105 /* Remove this connection */
1106 SilcPacketStream sock;
1107 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1110 silc_schedule_task_add_timeout(server->schedule,
1111 silc_server_rehash_close_connection,
1117 if (server->config->clients) {
1118 SilcServerConfigClient *ptr;
1119 SilcServerConfigClient *newptr;
1122 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1125 /* Check whether new config has this one too */
1126 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1127 if (silc_string_compare(newptr->host, ptr->host)) {
1133 if (!found && ptr->host) {
1134 /* Remove this connection */
1135 SilcPacketStream sock;
1136 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1139 silc_schedule_task_add_timeout(server->schedule,
1140 silc_server_rehash_close_connection,
1146 /* Create connections after rehash */
1147 silc_server_create_connections(server);
1149 /* Check whether our router status has changed */
1150 if (newconfig->servers) {
1151 SilcServerConfigServer *ptr = newconfig->servers;
1153 server->server_type = SILC_ROUTER;
1155 if (ptr->backup_router) {
1156 server->server_type = SILC_BACKUP_ROUTER;
1157 server->backup_router = TRUE;
1158 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1165 /* Our old config is gone now. We'll unreference our reference made in
1166 silc_server_init and then destroy it since we are destroying it
1167 underneath the application (layer which called silc_server_init). */
1168 silc_server_config_unref(&server->config_ref);
1169 silc_server_config_destroy(server->config);
1171 /* Take new config context */
1172 server->config = newconfig;
1173 silc_server_config_ref(&server->config_ref, server->config, server->config);
1176 /* Set debugging on if configured */
1177 if (server->config->debug_string) {
1178 silc_log_debug(TRUE);
1179 silc_log_set_debug_string(server->config->debug_string);
1181 #endif /* SILC_DEBUG */
1183 SILC_LOG_DEBUG(("Server rehashed"));
1188 /* The heart of the server. This runs the scheduler thus runs the server.
1189 When this returns the server has been stopped and the program will
1192 void silc_server_run(SilcServer server)
1194 SILC_LOG_INFO(("SILC Server started"));
1196 /* Start the scheduler, the heart of the SILC server. When this returns
1197 the program will be terminated. */
1198 silc_schedule(server->schedule);
1201 /* Stops the SILC server. This function is used to shutdown the server.
1202 This is usually called after the scheduler has returned. After stopping
1203 the server one should call silc_server_free. */
1205 void silc_server_stop(SilcServer server)
1208 SilcPacketStream ps;
1209 SilcNetListener listener;
1211 SILC_LOG_INFO(("SILC Server shutting down"));
1213 server->server_shutdown = TRUE;
1215 /* Close all connections */
1216 if (server->packet_engine) {
1217 list = silc_packet_engine_get_streams(server->packet_engine);
1219 silc_dlist_start(list);
1220 while ((ps = silc_dlist_get(list))) {
1221 SilcIDListData idata = silc_packet_get_context(ps);
1223 if (!silc_packet_stream_is_valid(ps))
1227 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1229 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1230 "Server is shutting down");
1231 silc_server_free_sock_user_data(server, ps,
1232 "Server is shutting down");
1234 silc_packet_engine_free_streams_list(list);
1237 /* We are not connected to network anymore */
1238 server->standalone = TRUE;
1240 silc_dlist_start(server->listeners);
1241 while ((listener = silc_dlist_get(server->listeners)))
1242 silc_net_close_listener(listener);
1244 silc_server_http_uninit(server);
1246 /* Cancel any possible retry timeouts */
1247 silc_schedule_task_del_by_callback(server->schedule,
1248 silc_server_connect_router);
1249 silc_schedule_task_del_by_callback(server->schedule,
1250 silc_server_connect_to_router_retry);
1251 silc_schedule_task_del_by_callback(server->schedule,
1252 silc_server_connect_to_router);
1254 silc_schedule_stop(server->schedule);
1256 SILC_LOG_DEBUG(("Server stopped"));
1259 /* Purge expired client entries from the server */
1261 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1263 SilcServer server = context;
1264 SilcClientEntry client;
1266 SilcUInt64 curtime = silc_time();
1268 SILC_LOG_DEBUG(("Expire timeout"));
1270 silc_dlist_start(server->expired_clients);
1271 while ((client = silc_dlist_get(server->expired_clients))) {
1272 /* For unregistered clients the created timestamp is actually
1273 unregistered timestamp. Make sure client remains in history
1274 at least 500 seconds. */
1275 if (client->data.created && curtime - client->data.created < 500)
1278 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1279 server->local_list : server->global_list);
1281 silc_idlist_del_data(client);
1282 silc_idlist_del_client(id_list, client);
1283 silc_dlist_del(server->expired_clients, client);
1286 silc_schedule_task_add_timeout(server->schedule,
1287 silc_server_purge_expired_clients, server,
1292 /******************************* Connecting *********************************/
1294 /* Free connection context */
1296 void silc_server_connection_free(SilcServerConnection sconn)
1300 SILC_LOG_DEBUG(("Free connection %p", sconn));
1301 silc_dlist_del(sconn->server->conns, sconn);
1302 silc_server_config_unref(&sconn->conn);
1303 silc_free(sconn->remote_host);
1304 silc_free(sconn->backup_replace_ip);
1308 /* Creates connection to a remote router. */
1310 void silc_server_create_connection(SilcServer server,
1313 const char *remote_host, SilcUInt32 port,
1314 SilcServerConnectCallback callback,
1317 SilcServerConnection sconn;
1319 /* Allocate connection object for hold connection specific stuff. */
1320 sconn = silc_calloc(1, sizeof(*sconn));
1323 sconn->remote_host = strdup(remote_host);
1324 sconn->remote_port = port;
1325 sconn->no_reconnect = reconnect == FALSE;
1326 sconn->callback = callback;
1327 sconn->callback_context = context;
1328 sconn->no_conf = dynamic;
1329 sconn->server = server;
1331 SILC_LOG_DEBUG(("Created connection %p to %s:%d", sconn,
1332 remote_host, port));
1334 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1338 /* Connection authentication completion callback */
1341 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1344 SilcServerConnection sconn = context;
1345 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1346 SilcServer server = entry->server;
1347 SilcServerConfigServer *conn;
1348 SilcServerConfigConnParams *param;
1349 SilcIDListData idata;
1350 SilcServerEntry id_entry = NULL;
1351 unsigned char id[32];
1356 SILC_LOG_DEBUG(("Connection %p authentication completed, entry %p",
1361 if (success == FALSE) {
1362 /* Authentication failed */
1364 /* Try reconnecting if configuration wants it */
1365 if (!sconn->no_reconnect) {
1366 silc_schedule_task_add_timeout(server->schedule,
1367 silc_server_connect_to_router_retry,
1369 silc_dlist_del(server->conns, sconn);
1373 if (sconn->callback)
1374 (*sconn->callback)(server, NULL, sconn->callback_context);
1375 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1376 silc_server_disconnect_remote(server, sconn->sock,
1377 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1381 /* XXX For now remote is router always */
1382 entry->data.conn_type = SILC_CONN_ROUTER;
1384 SILC_LOG_INFO(("Connected to %s %s",
1385 SILC_CONNTYPE_STRING(entry->data.conn_type),
1386 sconn->remote_host));
1388 /* Create the actual entry for remote entity */
1389 switch (entry->data.conn_type) {
1390 case SILC_CONN_SERVER:
1391 SILC_LOG_DEBUG(("Remote is SILC server"));
1393 /* Add new server. The server must register itself to us before it
1394 becomes registered to SILC network. */
1395 id_entry = silc_idlist_add_server(server->local_list,
1396 strdup(sconn->remote_host),
1397 SILC_SERVER, NULL, NULL, sconn->sock);
1399 if (sconn->callback)
1400 (*sconn->callback)(server, NULL, sconn->callback_context);
1401 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1402 silc_server_disconnect_remote(server, sconn->sock,
1403 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1408 server->stat.my_servers++;
1409 if (server->server_type == SILC_ROUTER)
1410 server->stat.servers++;
1411 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1413 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1416 case SILC_CONN_ROUTER:
1417 SILC_LOG_DEBUG(("Remote is SILC router"));
1419 /* Register to network */
1420 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1421 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1422 SILC_STR_UI_SHORT(id_len),
1423 SILC_STR_DATA(id, id_len),
1424 SILC_STR_UI_SHORT(strlen(server->server_name)),
1425 SILC_STR_DATA(server->server_name,
1426 strlen(server->server_name)),
1428 if (sconn->callback)
1429 (*sconn->callback)(server, NULL, sconn->callback_context);
1430 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1431 silc_server_disconnect_remote(server, sconn->sock,
1432 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1437 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1439 /* Check that we do not have this ID already */
1440 id_entry = silc_idlist_find_server_by_id(server->local_list,
1441 &remote_id.u.server_id,
1444 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1446 id_entry = silc_idlist_find_server_by_id(server->global_list,
1447 &remote_id.u.server_id,
1450 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1454 SILC_LOG_DEBUG(("New server id(%s)",
1455 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1457 /* Add the connected router to global server list. Router is sent
1458 as NULL since it's local to us. */
1459 id_entry = silc_idlist_add_server(server->global_list,
1460 strdup(sconn->remote_host),
1462 silc_id_dup(&remote_id.u.server_id,
1466 /* Try reconnecting if configuration wants it */
1467 if (!sconn->no_reconnect) {
1468 silc_schedule_task_add_timeout(server->schedule,
1469 silc_server_connect_to_router_retry,
1471 silc_dlist_del(server->conns, sconn);
1475 if (sconn->callback)
1476 (*sconn->callback)(server, NULL, sconn->callback_context);
1477 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1478 silc_server_disconnect_remote(server, sconn->sock,
1479 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1484 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1485 idata = (SilcIDListData)id_entry;
1486 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1487 SILC_IDLIST_STATUS_LOCAL);
1488 idata->sconn = sconn;
1489 idata->sconn->callback = NULL;
1492 server->stat.my_routers++;
1493 if (server->server_type == SILC_ROUTER)
1494 server->stat.routers++;
1495 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1497 if (!sconn->backup) {
1498 /* Mark this router our primary router if we're still standalone */
1499 if (server->standalone) {
1500 SILC_LOG_DEBUG(("This connection is our primary router"));
1501 server->id_entry->router = id_entry;
1502 server->router = id_entry;
1503 server->router->server_type = SILC_ROUTER;
1504 server->standalone = FALSE;
1505 server->backup_primary = FALSE;
1507 /* Announce data if we are not backup router (unless not as primary
1508 currently). Backup router announces later at the end of
1509 resuming protocol. */
1510 if (server->backup_router && server->server_type == SILC_ROUTER) {
1511 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1513 /* If we are router then announce our possible servers. Backup
1514 router announces also global servers. */
1515 if (server->server_type == SILC_ROUTER)
1516 silc_server_announce_servers(server,
1517 server->backup_router ? TRUE : FALSE,
1518 0, SILC_PRIMARY_ROUTE(server));
1520 /* Announce our clients and channels to the router */
1521 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1522 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1525 /* If we are backup router then this primary router is whom we are
1527 if (server->server_type == SILC_BACKUP_ROUTER) {
1528 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1530 NULL, NULL, &ip, NULL);
1531 silc_server_backup_add(server, server->id_entry, ip,
1532 sconn->remote_port, TRUE);
1537 /* We already have primary router. Disconnect this connection */
1538 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1539 silc_idlist_del_server(server->global_list, id_entry);
1540 if (sconn->callback)
1541 (*sconn->callback)(server, NULL, sconn->callback_context);
1542 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1543 silc_server_disconnect_remote(server, sconn->sock,
1544 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1549 /* Add this server to be our backup router */
1550 id_entry->server_type = SILC_BACKUP_ROUTER;
1551 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1552 sconn->backup_replace_port, FALSE);
1558 if (sconn->callback)
1559 (*sconn->callback)(server, NULL, sconn->callback_context);
1560 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1561 silc_server_disconnect_remote(server, sconn->sock,
1562 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1566 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1568 conn = sconn->conn.ref_ptr;
1569 param = &server->config->param;
1570 if (conn && conn->param)
1571 param = conn->param;
1573 /* Register rekey timeout */
1574 sconn->rekey_timeout = param->key_exchange_rekey;
1575 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1576 sconn->sock, sconn->rekey_timeout, 0);
1578 /* Set the entry as packet stream context */
1579 silc_packet_set_context(sconn->sock, id_entry);
1581 /* Call the completion callback to indicate that we've connected to
1583 if (sconn && sconn->callback)
1584 (*sconn->callback)(server, id_entry, sconn->callback_context);
1586 if (sconn == server->router_conn)
1587 server->router_conn = NULL;
1592 /* SKE completion callback */
1594 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1595 SilcSKESecurityProperties prop,
1596 SilcSKEKeyMaterial keymat,
1597 SilcSKERekeyMaterial rekey,
1600 SilcPacketStream sock = context;
1601 SilcUnknownEntry entry = silc_packet_get_context(sock);
1602 SilcServerConnection sconn = entry->data.sconn;
1603 SilcServer server = entry->server;
1604 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1605 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1606 void *auth_data = NULL;
1607 SilcUInt32 auth_data_len = 0;
1608 SilcConnAuth connauth;
1609 SilcCipher send_key, receive_key;
1610 SilcHmac hmac_send, hmac_receive;
1613 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1617 if (status != SILC_SKE_STATUS_OK) {
1619 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1620 silc_ske_map_status(status), entry->hostname, entry->ip));
1623 /* Try reconnecting if configuration wants it */
1624 if (!sconn->no_reconnect) {
1625 silc_schedule_task_add_timeout(server->schedule,
1626 silc_server_connect_to_router_retry,
1628 silc_dlist_del(server->conns, sconn);
1632 if (sconn->callback)
1633 (*sconn->callback)(server, NULL, sconn->callback_context);
1634 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1635 silc_server_disconnect_remote(server, sconn->sock,
1636 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1640 SILC_LOG_DEBUG(("Setting keys into use"));
1642 /* Set the keys into use. The data will be encrypted after this. */
1643 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1644 &hmac_send, &hmac_receive, &hash)) {
1647 /* Try reconnecting if configuration wants it */
1648 if (!sconn->no_reconnect) {
1649 silc_schedule_task_add_timeout(server->schedule,
1650 silc_server_connect_to_router_retry,
1652 silc_dlist_del(server->conns, sconn);
1656 /* Error setting keys */
1657 if (sconn->callback)
1658 (*sconn->callback)(server, NULL, sconn->callback_context);
1659 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1660 silc_server_disconnect_remote(server, sconn->sock,
1661 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1664 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1665 hmac_receive, FALSE);
1667 SILC_LOG_DEBUG(("Starting connection authentication"));
1669 connauth = silc_connauth_alloc(server->schedule, ske,
1670 server->config->conn_auth_timeout);
1674 /* Try reconnecting if configuration wants it */
1675 if (!sconn->no_reconnect) {
1676 silc_schedule_task_add_timeout(server->schedule,
1677 silc_server_connect_to_router_retry,
1679 silc_dlist_del(server->conns, sconn);
1683 /** Error allocating auth protocol */
1684 if (sconn->callback)
1685 (*sconn->callback)(server, NULL, sconn->callback_context);
1686 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1687 silc_server_disconnect_remote(server, sconn->sock,
1688 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1692 /* Get authentication method */
1694 if (conn->passphrase) {
1695 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1696 auth_meth = SILC_AUTH_PUBLIC_KEY;
1697 auth_data = server->private_key;
1699 auth_meth = SILC_AUTH_PASSWORD;
1700 auth_data = conn->passphrase;
1701 auth_data_len = conn->passphrase_len;
1704 auth_meth = SILC_AUTH_PUBLIC_KEY;
1705 auth_data = server->private_key;
1709 entry->data.rekey = rekey;
1711 /* Start connection authentication */
1713 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1714 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1715 auth_data, auth_data_len,
1716 silc_server_ke_auth_compl, sconn);
1719 /* Function that is called when the network connection to a router has
1720 been established. This will continue with the key exchange protocol
1721 with the remote router. */
1723 void silc_server_start_key_exchange(SilcServerConnection sconn)
1725 SilcServer server = sconn->server;
1726 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1727 SilcUnknownEntry entry;
1728 SilcSKEParamsStruct params;
1731 /* Cancel any possible retry timeouts */
1732 silc_schedule_task_del_by_context(server->schedule, sconn);
1734 /* Create packet stream */
1735 sconn->sock = silc_packet_stream_create(server->packet_engine,
1736 server->schedule, sconn->stream);
1738 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1739 silc_stream_destroy(sconn->stream);
1741 /* Try reconnecting if configuration wants it */
1742 if (!sconn->no_reconnect) {
1743 silc_schedule_task_add_timeout(server->schedule,
1744 silc_server_connect_to_router_retry,
1746 silc_dlist_del(server->conns, sconn);
1750 if (sconn->callback)
1751 (*sconn->callback)(server, NULL, sconn->callback_context);
1752 silc_server_connection_free(sconn);
1755 server->stat.conn_num++;
1757 /* Set source ID to packet stream */
1758 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1760 silc_packet_stream_destroy(sconn->sock);
1762 /* Try reconnecting if configuration wants it */
1763 if (!sconn->no_reconnect) {
1764 silc_schedule_task_add_timeout(server->schedule,
1765 silc_server_connect_to_router_retry,
1767 silc_dlist_del(server->conns, sconn);
1771 if (sconn->callback)
1772 (*sconn->callback)(server, NULL, sconn->callback_context);
1773 silc_server_connection_free(sconn);
1777 /* Create entry for remote entity */
1778 entry = silc_calloc(1, sizeof(*entry));
1780 silc_packet_stream_destroy(sconn->sock);
1782 /* Try reconnecting if configuration wants it */
1783 if (!sconn->no_reconnect) {
1784 silc_schedule_task_add_timeout(server->schedule,
1785 silc_server_connect_to_router_retry,
1787 silc_dlist_del(server->conns, sconn);
1791 if (sconn->callback)
1792 (*sconn->callback)(server, NULL, sconn->callback_context);
1793 silc_server_connection_free(sconn);
1796 entry->server = server;
1797 entry->data.sconn = sconn;
1798 silc_packet_set_context(sconn->sock, entry);
1800 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1802 /* Set Key Exchange flags from configuration, but fall back to global
1804 memset(¶ms, 0, sizeof(params));
1805 SILC_GET_SKE_FLAGS(conn, params.flags);
1806 if (server->config->param.key_exchange_pfs)
1807 params.flags |= SILC_SKE_SP_FLAG_PFS;
1809 /* Start SILC Key Exchange protocol */
1810 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1811 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1812 server->public_key, server->private_key, sconn);
1815 silc_packet_stream_destroy(sconn->sock);
1817 /* Try reconnecting if configuration wants it */
1818 if (!sconn->no_reconnect) {
1819 silc_schedule_task_add_timeout(server->schedule,
1820 silc_server_connect_to_router_retry,
1822 silc_dlist_del(server->conns, sconn);
1826 if (sconn->callback)
1827 (*sconn->callback)(server, NULL, sconn->callback_context);
1828 silc_server_connection_free(sconn);
1831 silc_ske_set_callbacks(ske, silc_server_verify_key,
1832 silc_server_ke_completed, sconn->sock);
1834 /* Start key exchange protocol */
1835 params.version = silc_version_string;
1836 params.timeout_secs = server->config->key_exchange_timeout;
1837 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1840 /* Timeout callback that will be called to retry connecting to remote
1841 router. This is used by both normal and router server. This will wait
1842 before retrying the connecting. The timeout is generated by exponential
1843 backoff algorithm. */
1845 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1847 SilcServerConnection sconn = context;
1848 SilcServer server = sconn->server;
1849 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1850 SilcServerConfigConnParams *param =
1851 (conn->param ? conn->param : &server->config->param);
1853 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1854 sconn->remote_port));
1856 /* Calculate next timeout */
1857 if (sconn->retry_count >= 1) {
1858 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1859 if (sconn->retry_timeout > param->reconnect_interval_max)
1860 sconn->retry_timeout = param->reconnect_interval_max;
1862 sconn->retry_timeout = param->reconnect_interval;
1864 sconn->retry_count++;
1865 sconn->retry_timeout = sconn->retry_timeout +
1866 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1868 /* If we've reached max retry count, give up. */
1869 if ((sconn->retry_count > param->reconnect_count) &&
1870 sconn->no_reconnect) {
1871 SILC_LOG_ERROR(("Could not connect, giving up"));
1873 if (sconn->callback)
1874 (*sconn->callback)(server, NULL, sconn->callback_context);
1875 silc_server_connection_free(sconn);
1879 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1881 /* We will lookup a fresh pointer later */
1882 silc_server_config_unref(&sconn->conn);
1884 /* Wait before retrying */
1885 silc_schedule_task_del_by_context(server->schedule, sconn);
1886 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1887 sconn, sconn->retry_timeout, 0);
1890 /* Callback for async connection to remote router */
1892 static void silc_server_connection_established(SilcNetStatus status,
1896 SilcServerConnection sconn = context;
1897 SilcServer server = sconn->server;
1899 silc_schedule_task_del_by_context(server->schedule, sconn);
1904 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1905 sconn->remote_host, sconn->remote_port));
1907 /* Continue with key exchange protocol */
1908 sconn->stream = stream;
1909 silc_server_start_key_exchange(sconn);
1912 case SILC_NET_UNKNOWN_IP:
1913 case SILC_NET_UNKNOWN_HOST:
1914 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1915 sconn->remote_host, sconn->remote_port,
1916 silc_net_get_error_string(status)));
1917 if (!sconn->no_reconnect) {
1918 silc_schedule_task_add_timeout(sconn->server->schedule,
1919 silc_server_connect_to_router_retry,
1921 silc_dlist_del(server->conns, sconn);
1923 if (sconn->callback)
1924 (*sconn->callback)(server, NULL, sconn->callback_context);
1925 silc_server_connection_free(sconn);
1930 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1931 sconn->remote_host, sconn->remote_port,
1932 silc_net_get_error_string(status)));
1933 if (!sconn->no_reconnect) {
1934 silc_schedule_task_add_timeout(sconn->server->schedule,
1935 silc_server_connect_to_router_retry,
1937 silc_dlist_del(server->conns, sconn);
1939 if (sconn->callback)
1940 (*sconn->callback)(server, NULL, sconn->callback_context);
1941 silc_server_connection_free(sconn);
1947 /* Generic routine to use connect to a router. */
1949 SILC_TASK_CALLBACK(silc_server_connect_router)
1951 SilcServerConnection sconn = context;
1952 SilcServer server = sconn->server;
1953 SilcServerConfigRouter *rconn;
1955 silc_schedule_task_del_by_context(server->schedule, sconn);
1957 /* Don't connect if we are shutting down. */
1958 if (server->server_shutdown) {
1959 if (sconn->callback)
1960 (*sconn->callback)(server, NULL, sconn->callback_context);
1961 silc_server_connection_free(sconn);
1965 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1966 (sconn->backup ? "backup router" : "router"),
1967 sconn->remote_host, sconn->remote_port));
1969 if (!sconn->no_conf) {
1970 /* Find connection configuration */
1971 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1972 sconn->remote_port);
1974 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1975 (sconn->backup ? "backup router" : "router"),
1976 sconn->remote_host, sconn->remote_port));
1977 if (sconn->callback)
1978 (*sconn->callback)(server, NULL, sconn->callback_context);
1979 silc_server_connection_free(sconn);
1982 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1985 /* Connect to remote host */
1987 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1988 server->config->server_info->primary->server_ip),
1989 sconn->remote_host, sconn->remote_port,
1990 server->schedule, silc_server_connection_established,
1993 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1994 sconn->remote_host, sconn->remote_port));
1995 if (sconn->callback)
1996 (*sconn->callback)(server, NULL, sconn->callback_context);
1997 silc_server_connection_free(sconn);
2001 /* Add to connection list */
2002 silc_dlist_add(server->conns, sconn);
2005 /* This function connects to our primary router or if we are a router this
2006 establishes all our primary routes. This is called at the start of the
2007 server to do authentication and key exchange with our router - called
2010 SILC_TASK_CALLBACK(silc_server_connect_to_router)
2012 SilcServer server = context;
2013 SilcServerConnection sconn;
2014 SilcServerConfigRouter *ptr;
2015 SilcServerConfigConnParams *param;
2017 /* Don't connect if we are shutting down. */
2018 if (server->server_shutdown)
2021 SILC_LOG_DEBUG(("We are %s",
2022 (server->server_type == SILC_SERVER ?
2023 "normal server" : server->server_type == SILC_ROUTER ?
2024 "router" : "backup router/normal server")));
2026 if (!server->config->routers) {
2027 /* There wasn't a configured router, we will continue but we don't
2028 have a connection to outside world. We will be standalone server. */
2029 SILC_LOG_DEBUG(("No router(s), we are standalone"));
2030 server->standalone = TRUE;
2034 /* Cancel any possible retry timeouts */
2035 silc_schedule_task_del_by_callback(server->schedule,
2036 silc_server_connect_router);
2037 silc_schedule_task_del_by_callback(server->schedule,
2038 silc_server_connect_to_router_retry);
2040 /* Create the connections to all our routes */
2041 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
2043 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
2044 ptr->backup_router ? "Backup router" : "Router",
2045 ptr->initiator ? "Initiator" : "Responder",
2046 ptr->host, ptr->port));
2048 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
2049 ptr->initiator == FALSE && !server->backup_router &&
2050 !silc_server_config_get_backup_router(server))
2051 server->wait_backup = TRUE;
2053 if (!ptr->initiator)
2055 if (ptr->dynamic_connection)
2058 /* Check whether we are connecting or connected to this host already */
2059 if (silc_server_num_sockets_by_remote(server,
2060 silc_net_is_ip(ptr->host) ?
2062 silc_net_is_ip(ptr->host) ?
2063 NULL : ptr->host, ptr->port,
2064 SILC_CONN_ROUTER)) {
2065 SILC_LOG_DEBUG(("We are already connected to %s:%d",
2066 ptr->host, ptr->port));
2068 /* If we don't have primary router and this connection is our
2069 primary router we are in desync. Reconnect to the primary. */
2070 if (server->standalone && !server->router) {
2072 SilcPacketStream sock;
2073 SilcServerConfigRouter *primary =
2074 silc_server_config_get_primary_router(server);
2077 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
2078 ptr->host, ptr->port);
2081 server->backup_noswitch = TRUE;
2082 silc_server_free_sock_user_data(server, sock, NULL);
2083 silc_server_disconnect_remote(server, sock, 0, NULL);
2084 server->backup_noswitch = FALSE;
2085 SILC_LOG_DEBUG(("Reconnecting to primary router"));
2091 param = (ptr->param ? ptr->param : &server->config->param);
2093 /* Allocate connection object for hold connection specific stuff. */
2094 sconn = silc_calloc(1, sizeof(*sconn));
2097 sconn->server = server;
2098 sconn->remote_host = strdup(ptr->host);
2099 sconn->remote_port = ptr->port;
2100 sconn->backup = ptr->backup_router;
2101 if (sconn->backup) {
2102 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2103 sconn->backup_replace_port = ptr->backup_replace_port;
2105 sconn->no_reconnect = param->reconnect_keep_trying == FALSE;
2107 SILC_LOG_DEBUG(("Created connection %p", sconn));
2109 if (!server->router_conn && !sconn->backup)
2110 server->router_conn = sconn;
2113 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2119 /************************ Accepting new connection **************************/
2121 /* After this is called, server don't wait for backup router anymore.
2122 This gets called automatically even after we have backup router
2123 connection established. */
2125 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2127 SilcServer server = context;
2128 server->wait_backup = FALSE;
2131 /* Authentication data callback */
2134 silc_server_accept_get_auth(SilcConnAuth connauth,
2135 SilcConnectionType conn_type,
2136 unsigned char **passphrase,
2137 SilcUInt32 *passphrase_len,
2138 SilcSKR *repository,
2141 SilcPacketStream sock = context;
2142 SilcUnknownEntry entry = silc_packet_get_context(sock);
2143 SilcServer server = entry->server;
2145 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2147 /* Remote end is client */
2148 if (conn_type == SILC_CONN_CLIENT) {
2149 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2153 *passphrase = cconfig->passphrase;
2154 *passphrase_len = cconfig->passphrase_len;
2155 if (cconfig->publickeys)
2156 *repository = server->repository;
2158 if (cconfig->publickeys) {
2159 if (server->config->prefer_passphrase_auth) {
2163 *passphrase_len = 0;
2167 entry->conn_type = conn_type;
2171 /* Remote end is server */
2172 if (conn_type == SILC_CONN_SERVER) {
2173 SilcServerConfigServer *sconfig;
2175 /* If we are normal server, don't accept the connection */
2176 if (server->server_type == SILC_SERVER)
2179 sconfig = entry->sconfig.ref_ptr;
2183 *passphrase = sconfig->passphrase;
2184 *passphrase_len = sconfig->passphrase_len;
2185 if (sconfig->publickeys)
2186 *repository = server->repository;
2188 if (sconfig->publickeys) {
2189 if (server->config->prefer_passphrase_auth) {
2193 *passphrase_len = 0;
2197 entry->conn_type = conn_type;
2201 /* Remote end is router */
2202 if (conn_type == SILC_CONN_ROUTER) {
2203 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2207 *passphrase = rconfig->passphrase;
2208 *passphrase_len = rconfig->passphrase_len;
2209 if (rconfig->publickeys)
2210 *repository = server->repository;
2212 if (rconfig->publickeys) {
2213 if (server->config->prefer_passphrase_auth) {
2217 *passphrase_len = 0;
2221 entry->conn_type = conn_type;
2228 /* Authentication completion callback. */
2231 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2234 SilcPacketStream sock = context;
2235 SilcUnknownEntry entry = silc_packet_get_context(sock);
2236 SilcIDListData idata = (SilcIDListData)entry;
2237 SilcServer server = entry->server;
2238 SilcServerConfigConnParams *param = &server->config->param;
2239 SilcServerConnection sconn;
2241 const char *hostname, *ip;
2245 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2246 NULL, &hostname, &ip, &port);
2248 if (success == FALSE) {
2249 /* Authentication failed */
2250 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2251 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2252 server->stat.auth_failures++;
2253 silc_server_disconnect_remote(server, sock,
2254 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2255 silc_server_config_unref(&entry->cconfig);
2256 silc_server_config_unref(&entry->sconfig);
2257 silc_server_config_unref(&entry->rconfig);
2258 silc_server_free_sock_user_data(server, sock, NULL);
2262 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2264 switch (entry->conn_type) {
2265 case SILC_CONN_CLIENT:
2267 SilcClientEntry client;
2268 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2270 /* Verify whether this connection is after all allowed to connect */
2271 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2272 &server->config->param,
2274 silc_connauth_get_ske(connauth))) {
2275 server->stat.auth_failures++;
2279 /* If we are primary router and we have backup router configured
2280 but it has not connected to use yet, do not accept any other
2282 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2283 !server->backup_router) {
2284 SilcServerConfigRouter *router;
2285 router = silc_server_config_get_backup_router(server);
2286 if (router && strcmp(server->config->server_info->primary->server_ip,
2288 silc_server_find_socket_by_host(server,
2290 router->backup_replace_ip, 0)) {
2291 SILC_LOG_INFO(("Will not accept connections because we do "
2292 "not have backup router connection established"));
2293 silc_server_disconnect_remote(server, sock,
2294 SILC_STATUS_ERR_PERM_DENIED,
2295 "We do not have connection to backup "
2296 "router established, try later");
2297 silc_server_config_unref(&entry->cconfig);
2298 silc_server_config_unref(&entry->sconfig);
2299 silc_server_config_unref(&entry->rconfig);
2300 silc_server_free_sock_user_data(server, sock, NULL);
2301 server->stat.auth_failures++;
2303 /* From here on, wait 20 seconds for the backup router to appear. */
2304 silc_schedule_task_add_timeout(server->schedule,
2305 silc_server_backup_router_wait,
2306 (void *)server, 20, 0);
2311 SILC_LOG_DEBUG(("Remote host is client"));
2312 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2315 /* Add the client to the client ID cache. The nickname and Client ID
2316 and other information is created after we have received NEW_CLIENT
2317 packet from client. */
2318 client = silc_idlist_add_client(server->local_list,
2319 NULL, NULL, NULL, NULL, NULL, sock);
2321 SILC_LOG_ERROR(("Could not add new client to cache"));
2322 server->stat.auth_failures++;
2323 silc_server_disconnect_remote(server, sock,
2324 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2325 silc_server_config_unref(&entry->cconfig);
2326 silc_server_config_unref(&entry->sconfig);
2327 silc_server_config_unref(&entry->rconfig);
2328 silc_server_free_sock_user_data(server, sock, NULL);
2331 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2332 entry->data.conn_type = SILC_CONN_CLIENT;
2335 server->stat.my_clients++;
2336 server->stat.clients++;
2337 server->stat.cell_clients++;
2339 /* Get connection parameters */
2341 param = conn->param;
2343 if (!param->keepalive_secs)
2344 param->keepalive_secs = server->config->param.keepalive_secs;
2346 if (!param->qos && server->config->param.qos) {
2347 param->qos = server->config->param.qos;
2348 param->qos_rate_limit = server->config->param.qos_rate_limit;
2349 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2350 param->qos_limit_sec = server->config->param.qos_limit_sec;
2351 param->qos_limit_usec = server->config->param.qos_limit_usec;
2354 /* Check if to be anonymous connection */
2355 if (param->anonymous)
2356 client->mode |= SILC_UMODE_ANONYMOUS;
2359 /* Add public key to repository */
2360 SILC_LOG_DEBUG(("Add client public key to repository"));
2361 if (!silc_server_get_public_key_by_client(server, client, NULL))
2362 silc_skr_add_public_key_simple(server->repository,
2363 entry->data.public_key,
2364 SILC_SKR_USAGE_IDENTIFICATION, client,
2367 id_entry = (void *)client;
2371 case SILC_CONN_SERVER:
2372 case SILC_CONN_ROUTER:
2374 SilcServerEntry new_server;
2375 SilcBool initiator = FALSE;
2376 SilcBool backup_local = FALSE;
2377 SilcBool backup_router = FALSE;
2378 char *backup_replace_ip = NULL;
2379 SilcUInt16 backup_replace_port = 0;
2380 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2381 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2383 /* If we are backup router and this is incoming server connection
2384 and we do not have connection to primary router, do not allow
2386 if (server->server_type == SILC_BACKUP_ROUTER &&
2387 entry->conn_type == SILC_CONN_SERVER &&
2388 !SILC_PRIMARY_ROUTE(server)) {
2389 SILC_LOG_INFO(("Will not accept server connection because we do "
2390 "not have primary router connection established"));
2391 silc_server_disconnect_remote(server, sock,
2392 SILC_STATUS_ERR_PERM_DENIED,
2393 "We do not have connection to primary "
2394 "router established, try later");
2395 silc_server_config_unref(&entry->cconfig);
2396 silc_server_config_unref(&entry->sconfig);
2397 silc_server_config_unref(&entry->rconfig);
2398 silc_server_free_sock_user_data(server, sock, NULL);
2399 server->stat.auth_failures++;
2403 if (entry->conn_type == SILC_CONN_ROUTER) {
2404 /* Verify whether this connection is after all allowed to connect */
2405 if (!silc_server_connection_allowed(server, sock,
2407 &server->config->param,
2408 rconn ? rconn->param : NULL,
2409 silc_connauth_get_ske(connauth))) {
2410 silc_server_config_unref(&entry->cconfig);
2411 silc_server_config_unref(&entry->sconfig);
2412 silc_server_config_unref(&entry->rconfig);
2413 server->stat.auth_failures++;
2419 param = rconn->param;
2421 if (!param->keepalive_secs)
2422 param->keepalive_secs = server->config->param.keepalive_secs;
2424 if (!param->qos && server->config->param.qos) {
2425 param->qos = server->config->param.qos;
2426 param->qos_rate_limit = server->config->param.qos_rate_limit;
2427 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2428 param->qos_limit_sec = server->config->param.qos_limit_sec;
2429 param->qos_limit_usec = server->config->param.qos_limit_usec;
2433 initiator = rconn->initiator;
2434 backup_local = rconn->backup_local;
2435 backup_router = rconn->backup_router;
2436 backup_replace_ip = rconn->backup_replace_ip;
2437 backup_replace_port = rconn->backup_replace_port;
2441 if (entry->conn_type == SILC_CONN_SERVER) {
2442 /* Verify whether this connection is after all allowed to connect */
2443 if (!silc_server_connection_allowed(server, sock,
2445 &server->config->param,
2446 srvconn ? srvconn->param : NULL,
2447 silc_connauth_get_ske(connauth))) {
2448 server->stat.auth_failures++;
2452 if (srvconn->param) {
2453 param = srvconn->param;
2455 if (!param->keepalive_secs)
2456 param->keepalive_secs = server->config->param.keepalive_secs;
2458 if (!param->qos && server->config->param.qos) {
2459 param->qos = server->config->param.qos;
2460 param->qos_rate_limit = server->config->param.qos_rate_limit;
2461 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2462 param->qos_limit_sec = server->config->param.qos_limit_sec;
2463 param->qos_limit_usec = server->config->param.qos_limit_usec;
2467 backup_router = srvconn->backup_router;
2471 /* If we are primary router and we have backup router configured
2472 but it has not connected to use yet, do not accept any other
2474 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2475 !server->backup_router && !backup_router) {
2476 SilcServerConfigRouter *router;
2477 router = silc_server_config_get_backup_router(server);
2478 if (router && strcmp(server->config->server_info->primary->server_ip,
2480 silc_server_find_socket_by_host(server,
2482 router->backup_replace_ip, 0)) {
2483 SILC_LOG_INFO(("Will not accept connections because we do "
2484 "not have backup router connection established"));
2485 silc_server_disconnect_remote(server, sock,
2486 SILC_STATUS_ERR_PERM_DENIED,
2487 "We do not have connection to backup "
2488 "router established, try later");
2489 silc_server_config_unref(&entry->cconfig);
2490 silc_server_config_unref(&entry->sconfig);
2491 silc_server_config_unref(&entry->rconfig);
2492 silc_server_free_sock_user_data(server, sock, NULL);
2493 server->stat.auth_failures++;
2495 /* From here on, wait 20 seconds for the backup router to appear. */
2496 silc_schedule_task_add_timeout(server->schedule,
2497 silc_server_backup_router_wait,
2498 (void *)server, 20, 0);
2503 SILC_LOG_DEBUG(("Remote host is %s",
2504 entry->conn_type == SILC_CONN_SERVER ?
2505 "server" : (backup_router ?
2506 "backup router" : "router")));
2507 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2508 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2509 "server" : (backup_router ?
2510 "backup router" : "router")));
2512 /* Add the server into server cache. The server name and Server ID
2513 is updated after we have received NEW_SERVER packet from the
2514 server. We mark ourselves as router for this server if we really
2517 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2518 server->local_list : (backup_router ?
2519 server->local_list :
2520 server->global_list)),
2522 (entry->conn_type == SILC_CONN_SERVER ?
2523 SILC_SERVER : SILC_ROUTER),
2525 (entry->conn_type == SILC_CONN_SERVER ?
2526 server->id_entry : (backup_router ?
2527 server->id_entry : NULL)),
2530 SILC_LOG_ERROR(("Could not add new server to cache"));
2531 silc_server_disconnect_remote(server, sock,
2532 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2533 silc_server_config_unref(&entry->cconfig);
2534 silc_server_config_unref(&entry->sconfig);
2535 silc_server_config_unref(&entry->rconfig);
2536 silc_server_free_sock_user_data(server, sock, NULL);
2537 server->stat.auth_failures++;
2540 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2541 entry->data.conn_type = entry->conn_type;
2543 id_entry = (void *)new_server;
2545 /* If the incoming connection is router and marked as backup router
2546 then add it to be one of our backups */
2547 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2548 /* Change it back to SERVER type since that's what it really is. */
2550 entry->data.conn_type = SILC_CONN_SERVER;
2551 new_server->server_type = SILC_BACKUP_ROUTER;
2553 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2554 ("Backup router %s is now online",
2557 /* Remove the backup waiting with timeout */
2558 silc_schedule_task_add_timeout(server->schedule,
2559 silc_server_backup_router_wait,
2560 (void *)server, 10, 0);
2564 if (entry->data.conn_type == SILC_CONN_SERVER) {
2565 server->stat.my_servers++;
2566 server->stat.servers++;
2567 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2569 server->stat.my_routers++;
2570 server->stat.routers++;
2571 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2574 /* Check whether this connection is to be our primary router connection
2575 if we do not already have the primary route. */
2576 if (!backup_router &&
2577 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2578 if (silc_server_config_is_primary_route(server) && !initiator)
2581 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2582 server->standalone = FALSE;
2583 if (!server->id_entry->router) {
2584 server->id_entry->router = id_entry;
2585 server->router = id_entry;
2597 /* Add connection to server->conns so that we know we have connection
2599 sconn = silc_calloc(1, sizeof(*sconn));
2600 sconn->server = server;
2602 sconn->remote_host = strdup(hostname);
2603 sconn->remote_port = port;
2604 silc_dlist_add(server->conns, sconn);
2605 idata->sconn = sconn;
2606 idata->sconn->callback = NULL;
2607 idata->last_receive = time(NULL);
2609 /* Add the common data structure to the ID entry. */
2610 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2611 silc_packet_set_context(sock, id_entry);
2613 /* Connection has been fully established now. Everything is ok. */
2614 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2616 /* Perform Quality of Service */
2618 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2619 param->qos_rate_limit, param->qos_bytes_limit,
2620 param->qos_limit_sec, param->qos_limit_usec);
2622 silc_server_config_unref(&entry->cconfig);
2623 silc_server_config_unref(&entry->sconfig);
2624 silc_server_config_unref(&entry->rconfig);
2628 silc_ske_free(silc_connauth_get_ske(connauth));
2629 silc_connauth_free(connauth);
2632 /* SKE completion callback. We set the new keys into use here. */
2635 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2636 SilcSKESecurityProperties prop,
2637 SilcSKEKeyMaterial keymat,
2638 SilcSKERekeyMaterial rekey,
2641 SilcPacketStream sock = context;
2642 SilcUnknownEntry entry = silc_packet_get_context(sock);
2643 SilcIDListData idata = (SilcIDListData)entry;
2644 SilcServer server = entry->server;
2645 SilcConnAuth connauth;
2646 SilcCipher send_key, receive_key;
2647 SilcHmac hmac_send, hmac_receive;
2654 if (status != SILC_SKE_STATUS_OK) {
2656 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2657 silc_ske_map_status(status), entry->hostname, entry->ip));
2659 silc_server_disconnect_remote(server, sock,
2660 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2661 silc_server_config_unref(&entry->cconfig);
2662 silc_server_config_unref(&entry->sconfig);
2663 silc_server_config_unref(&entry->rconfig);
2664 silc_server_free_sock_user_data(server, sock, NULL);
2668 SILC_LOG_DEBUG(("Setting keys into use"));
2670 /* Set the keys into use. The data will be encrypted after this. */
2671 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2672 &hmac_send, &hmac_receive, &hash)) {
2673 /* Error setting keys */
2675 silc_server_disconnect_remote(server, sock,
2676 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2677 silc_server_free_sock_user_data(server, sock, NULL);
2680 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2681 hmac_receive, FALSE);
2683 idata->rekey = rekey;
2684 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2685 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2686 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2688 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2690 SILC_LOG_DEBUG(("Starting connection authentication"));
2691 server->stat.auth_attempts++;
2693 connauth = silc_connauth_alloc(server->schedule, ske,
2694 server->config->conn_auth_timeout);
2696 /** Error allocating auth protocol */
2698 silc_server_disconnect_remote(server, sock,
2699 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2700 silc_server_config_unref(&entry->cconfig);
2701 silc_server_config_unref(&entry->sconfig);
2702 silc_server_config_unref(&entry->rconfig);
2703 silc_server_free_sock_user_data(server, sock, NULL);
2707 /* Start connection authentication */
2709 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2710 silc_server_accept_auth_compl, sock);
2713 /* Accept new TCP connection */
2715 static void silc_server_accept_new_connection(SilcNetStatus status,
2719 SilcServer server = context;
2720 SilcPacketStream packet_stream;
2721 SilcServerConfigClient *cconfig = NULL;
2722 SilcServerConfigServer *sconfig = NULL;
2723 SilcServerConfigRouter *rconfig = NULL;
2724 SilcServerConfigDeny *deny;
2725 SilcUnknownEntry entry;
2727 SilcSKEParamsStruct params;
2728 char *hostname, *ip;
2731 SILC_LOG_DEBUG(("Accepting new connection"));
2733 /* Check for maximum allowed connections */
2734 server->stat.conn_attempts++;
2735 if (silc_dlist_count(server->conns) >
2736 server->config->param.connections_max) {
2737 SILC_LOG_ERROR(("Refusing connection, server is full"));
2738 server->stat.conn_failures++;
2739 silc_stream_destroy(stream);
2743 /* Get hostname, IP and port */
2744 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2745 (const char **)&ip, &port)) {
2746 /* Bad socket stream */
2747 server->stat.conn_failures++;
2748 silc_stream_destroy(stream);
2752 /* Create packet stream */
2753 packet_stream = silc_packet_stream_create(server->packet_engine,
2754 server->schedule, stream);
2755 if (!packet_stream) {
2756 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2757 server->stat.conn_failures++;
2758 silc_stream_destroy(stream);
2761 server->stat.conn_num++;
2763 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2765 /* Set source ID to packet stream */
2766 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2769 server->stat.conn_failures++;
2770 silc_packet_stream_destroy(packet_stream);
2774 /* Check whether this connection is denied to connect to us. */
2775 deny = silc_server_config_find_denied(server, ip);
2777 deny = silc_server_config_find_denied(server, hostname);
2779 /* The connection is denied */
2780 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2781 silc_server_disconnect_remote(server, packet_stream,
2782 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2784 silc_server_free_sock_user_data(server, packet_stream, NULL);
2788 /* Check whether we have configured this sort of connection at all. We
2789 have to check all configurations since we don't know what type of
2790 connection this is. */
2791 if (!(cconfig = silc_server_config_find_client(server, ip)))
2792 cconfig = silc_server_config_find_client(server, hostname);
2793 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2794 sconfig = silc_server_config_find_server_conn(server, hostname);
2795 if (server->server_type == SILC_ROUTER)
2796 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2797 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2798 if (!cconfig && !sconfig && !rconfig) {
2799 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2800 server->stat.conn_failures++;
2801 silc_server_disconnect_remote(server, packet_stream,
2802 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2803 silc_server_free_sock_user_data(server, packet_stream, NULL);
2807 /* The connection is allowed */
2808 entry = silc_calloc(1, sizeof(*entry));
2810 server->stat.conn_failures++;
2811 silc_server_disconnect_remote(server, packet_stream,
2812 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2813 silc_server_free_sock_user_data(server, packet_stream, NULL);
2816 entry->hostname = hostname;
2819 entry->server = server;
2820 entry->data.conn_type = SILC_CONN_UNKNOWN;
2821 silc_packet_set_context(packet_stream, entry);
2823 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2825 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2826 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2827 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2829 /* Take flags for key exchange. Since we do not know what type of connection
2830 this is, we go through all found configurations and use the global ones
2831 as well. This will result always into strictest key exchange flags. */
2832 memset(¶ms, 0, sizeof(params));
2833 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2834 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2835 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2836 if (server->config->param.key_exchange_pfs)
2837 params.flags |= SILC_SKE_SP_FLAG_PFS;
2839 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2840 server->stat.conn_attempts++;
2842 /* Start SILC Key Exchange protocol */
2843 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2844 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2845 server->public_key, server->private_key,
2848 server->stat.conn_failures++;
2849 silc_server_disconnect_remote(server, packet_stream,
2850 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2851 silc_server_free_sock_user_data(server, packet_stream, NULL);
2854 silc_ske_set_callbacks(ske, silc_server_verify_key,
2855 silc_server_accept_completed, packet_stream);
2857 /* Start key exchange protocol */
2858 params.version = silc_version_string;
2859 params.timeout_secs = server->config->key_exchange_timeout;
2860 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2864 /********************************** Rekey ***********************************/
2866 /* Initiator rekey completion callback */
2868 static void silc_server_rekey_completion(SilcSKE ske,
2869 SilcSKEStatus status,
2870 const SilcSKESecurityProperties prop,
2871 const SilcSKEKeyMaterial keymat,
2872 SilcSKERekeyMaterial rekey,
2875 SilcPacketStream sock = context;
2876 SilcIDListData idata = silc_packet_get_context(sock);
2877 SilcServer server = idata->sconn->server;
2879 idata->sconn->op = NULL;
2880 if (status != SILC_SKE_STATUS_OK) {
2881 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2882 idata->sconn->remote_host));
2886 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2887 idata->sconn->remote_host, idata->sconn->remote_port,
2888 SILC_CONNTYPE_STRING(idata->conn_type)));
2890 /* Save rekey data for next rekey */
2891 idata->rekey = rekey;
2893 /* Register new rekey timeout */
2894 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2895 sock, idata->sconn->rekey_timeout, 0);
2898 /* Rekey callback. Start rekey as initiator */
2900 SILC_TASK_CALLBACK(silc_server_do_rekey)
2902 SilcServer server = app_context;
2903 SilcPacketStream sock = context;
2904 SilcIDListData idata = silc_packet_get_context(sock);
2907 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2909 /* Do not execute rekey with disabled connections */
2910 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2913 /* If another protocol is active do not start rekey */
2914 if (idata->sconn->op) {
2915 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2916 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2921 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2922 idata->sconn->remote_host, idata->sconn->remote_port,
2923 SILC_CONNTYPE_STRING(idata->conn_type)));
2926 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2927 server->public_key, NULL, sock);
2931 /* Set SKE callbacks */
2932 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2935 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2938 /* Responder rekey completion callback */
2941 silc_server_rekey_resp_completion(SilcSKE ske,
2942 SilcSKEStatus status,
2943 const SilcSKESecurityProperties prop,
2944 const SilcSKEKeyMaterial keymat,
2945 SilcSKERekeyMaterial rekey,
2948 SilcPacketStream sock = context;
2949 SilcIDListData idata = silc_packet_get_context(sock);
2951 idata->sconn->op = NULL;
2952 if (status != SILC_SKE_STATUS_OK) {
2953 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2954 idata->sconn->remote_host));
2958 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2959 idata->sconn->remote_host, idata->sconn->remote_port,
2960 SILC_CONNTYPE_STRING(idata->conn_type)));
2962 /* Save rekey data for next rekey */
2963 idata->rekey = rekey;
2966 /* Start rekey as responder */
2968 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2971 SilcIDListData idata = silc_packet_get_context(sock);
2974 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2975 idata->sconn->remote_host, idata->sconn->remote_port,
2976 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2979 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2980 server->public_key, NULL, sock);
2982 silc_packet_free(packet);
2986 /* Set SKE callbacks */
2987 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2990 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2995 /****************************** Disconnection *******************************/
2997 /* Destroys packet stream. */
2999 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3001 silc_packet_stream_unref(context);
3004 /* Closes connection to socket connection */
3006 void silc_server_close_connection(SilcServer server,
3007 SilcPacketStream sock)
3009 SilcIDListData idata = silc_packet_get_context(sock);
3011 const char *hostname;
3014 if (!silc_packet_stream_is_valid(sock))
3017 memset(tmp, 0, sizeof(tmp));
3018 // silc_socket_get_error(sock, tmp, sizeof(tmp));
3019 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3020 NULL, &hostname, NULL, &port);
3021 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
3022 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
3023 tmp[0] ? tmp : ""));
3025 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
3027 if (idata && idata->sconn) {
3028 silc_server_connection_free(idata->sconn);
3029 idata->sconn = NULL;
3032 /* Take a reference and then destroy the stream. The last reference
3033 is released later in a timeout callback. */
3034 silc_packet_stream_ref(sock);
3035 silc_packet_stream_destroy(sock);
3037 /* Close connection with timeout */
3038 server->stat.conn_num--;
3039 silc_schedule_task_del_by_all(server->schedule, 0,
3040 silc_server_close_connection_final, sock);
3041 silc_schedule_task_add_timeout(server->schedule,
3042 silc_server_close_connection_final,
3046 /* Sends disconnect message to remote connection and disconnects the
3049 void silc_server_disconnect_remote(SilcServer server,
3050 SilcPacketStream sock,
3051 SilcStatus status, ...)
3053 unsigned char buf[512];
3060 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
3062 va_start(ap, status);
3063 cp = va_arg(ap, char *);
3065 silc_vsnprintf(buf, sizeof(buf), cp, ap);
3068 /* Send SILC_PACKET_DISCONNECT */
3069 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
3070 SILC_STR_UI_CHAR(status),
3071 SILC_STR_UI8_STRING(cp ? buf : NULL),
3074 /* Close connection */
3075 silc_server_close_connection(server, sock);
3078 /* Frees client data and notifies about client's signoff. */
3080 void silc_server_free_client_data(SilcServer server,
3081 SilcPacketStream sock,
3082 SilcClientEntry client,
3084 const char *signoff)
3086 SILC_LOG_DEBUG(("Freeing client %p data", client));
3089 /* Check if anyone is watching this nickname */
3090 if (server->server_type == SILC_ROUTER)
3091 silc_server_check_watcher_list(server, client, NULL,
3092 SILC_NOTIFY_TYPE_SIGNOFF);
3094 /* Send SIGNOFF notify to routers. */
3096 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3097 SILC_BROADCAST(server), client->id,
3101 /* Remove client from all channels */
3103 silc_server_remove_from_channels(server, NULL, client,
3104 TRUE, (char *)signoff, TRUE, FALSE);
3106 silc_server_remove_from_channels(server, NULL, client,
3107 FALSE, NULL, FALSE, FALSE);
3109 /* Remove this client from watcher list if it is */
3110 silc_server_del_from_watcher_list(server, client);
3112 /* Remove client's public key from repository, this will free it too. */
3113 if (client->data.public_key) {
3114 silc_skr_del_public_key(server->repository, client->data.public_key,
3116 client->data.public_key = NULL;
3119 /* Update statistics */
3120 server->stat.my_clients--;
3121 server->stat.clients--;
3122 if (server->stat.cell_clients)
3123 server->stat.cell_clients--;
3124 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3125 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3126 silc_schedule_task_del_by_context(server->schedule, client);
3128 if (client->data.sconn) {
3129 silc_server_connection_free(client->data.sconn);
3130 client->data.sconn = NULL;
3133 /* We will not delete the client entry right away. We will take it
3134 into history (for WHOWAS command) for 5 minutes, unless we're
3135 shutting down server. */
3136 if (!server->server_shutdown) {
3137 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3139 client->router = NULL;
3140 client->connection = NULL;
3141 client->data.created = silc_time();
3142 silc_dlist_del(server->expired_clients, client);
3143 silc_dlist_add(server->expired_clients, client);
3145 /* Delete directly since we're shutting down server */
3146 SILC_LOG_DEBUG(("Delete client directly"));
3147 silc_idlist_del_data(client);
3148 silc_idlist_del_client(server->local_list, client);
3152 /* Frees user_data pointer from socket connection object. This also sends
3153 appropriate notify packets to the network to inform about leaving
3156 void silc_server_free_sock_user_data(SilcServer server,
3157 SilcPacketStream sock,
3158 const char *signoff_message)
3160 SilcIDListData idata;
3167 SILC_LOG_DEBUG(("Start, sock %p", sock));
3169 idata = silc_packet_get_context(sock);
3173 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3176 /* Cancel active protocols */
3178 if (idata->sconn && idata->sconn->op) {
3179 SILC_LOG_DEBUG(("Abort active protocol"));
3180 silc_async_abort(idata->sconn->op, NULL, NULL);
3182 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3183 ((SilcUnknownEntry)idata)->op) {
3184 SILC_LOG_DEBUG(("Abort active protocol"));
3185 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3189 switch (idata->conn_type) {
3190 case SILC_CONN_CLIENT:
3192 SilcClientEntry client_entry = (SilcClientEntry)idata;
3193 silc_server_free_client_data(server, sock, client_entry, TRUE,
3195 silc_packet_set_context(sock, NULL);
3199 case SILC_CONN_SERVER:
3200 case SILC_CONN_ROUTER:
3202 SilcServerEntry user_data = (SilcServerEntry)idata;
3203 SilcServerEntry backup_router = NULL;
3205 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3208 backup_router = silc_server_backup_get(server, user_data->id);
3210 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3211 backup_router == server->id_entry &&
3212 idata->conn_type != SILC_CONN_ROUTER)
3213 backup_router = NULL;
3215 if (server->server_shutdown || server->backup_noswitch)
3216 backup_router = NULL;
3218 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3219 NULL, NULL, &ip, &port);
3221 /* If this was our primary router connection then we're lost to
3222 the outside world. */
3223 if (server->router == user_data) {
3224 /* Check whether we have a backup router connection */
3225 if (!backup_router || backup_router == user_data) {
3226 if (!server->no_reconnect)
3227 silc_server_create_connections(server);
3228 server->id_entry->router = NULL;
3229 server->router = NULL;
3230 server->standalone = TRUE;
3231 server->backup_primary = FALSE;
3232 backup_router = NULL;
3234 if (server->id_entry != backup_router) {
3235 SILC_LOG_INFO(("New primary router is backup router %s",
3236 backup_router->server_name));
3237 server->id_entry->router = backup_router;
3238 server->router = backup_router;
3239 server->router_connect = time(0);
3240 server->backup_primary = TRUE;
3241 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3243 /* Send START_USE to backup router to indicate we have switched */
3244 silc_server_backup_send_start_use(server,
3245 backup_router->connection,
3248 SILC_LOG_INFO(("We are now new primary router in this cell"));
3249 server->id_entry->router = NULL;
3250 server->router = NULL;
3251 server->standalone = TRUE;
3254 /* We stop here to take a breath */
3257 if (server->backup_router) {
3258 server->server_type = SILC_ROUTER;
3260 /* We'll need to constantly try to reconnect to the primary
3261 router so that we'll see when it comes back online. */
3262 silc_server_create_connection(server, TRUE, FALSE, ip, port,
3263 silc_server_backup_connected,
3267 /* Mark this connection as replaced */
3268 silc_server_backup_replaced_add(server, user_data->id,
3271 } else if (backup_router) {
3272 SILC_LOG_INFO(("Enabling the use of backup router %s",
3273 backup_router->server_name));
3275 /* Mark this connection as replaced */
3276 silc_server_backup_replaced_add(server, user_data->id,
3278 } else if (server->server_type == SILC_SERVER &&
3279 idata->conn_type == SILC_CONN_ROUTER) {
3280 /* Reconnect to the router (backup) */
3281 if (!server->no_reconnect)
3282 silc_server_create_connections(server);
3285 if (user_data->server_name)
3286 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3287 ("Server %s signoff", user_data->server_name));
3289 if (!backup_router) {
3290 /* Remove all servers that are originated from this server, and
3291 remove the clients of those servers too. */
3292 silc_server_remove_servers_by_server(server, user_data, TRUE);
3295 /* Remove the clients that this server owns as they will become
3296 invalid now too. For backup router the server is actually
3297 coming from the primary router, so mark that as the owner
3299 if (server->server_type == SILC_BACKUP_ROUTER &&
3300 sock->type == SILC_CONN_SERVER)
3301 silc_server_remove_clients_by_server(server, server->router,
3305 silc_server_remove_clients_by_server(server, user_data,
3308 /* Remove channels owned by this server */
3309 if (server->server_type == SILC_SERVER)
3310 silc_server_remove_channels_by_server(server, user_data);
3312 /* Enable local server connections that may be disabled */
3313 silc_server_local_servers_toggle_enabled(server, TRUE);
3315 /* Update the client entries of this server to the new backup
3316 router. If we are the backup router we also resolve the real
3317 servers for the clients. After updating is over this also
3318 removes the clients that this server explicitly owns. */
3319 silc_server_update_clients_by_server(server, user_data,
3320 backup_router, TRUE);
3322 /* If we are router and just lost our primary router (now standlaone)
3323 we remove everything that was behind it, since we don't know
3325 if (server->server_type == SILC_ROUTER && server->standalone)
3326 /* Remove all servers that are originated from this server, and
3327 remove the clients of those servers too. */
3328 silc_server_remove_servers_by_server(server, user_data, TRUE);
3330 /* Finally remove the clients that are explicitly owned by this
3331 server. They go down with the server. */
3332 silc_server_remove_clients_by_server(server, user_data,
3335 /* Update our server cache to use the new backup router too. */
3336 silc_server_update_servers_by_server(server, user_data, backup_router);
3337 if (server->server_type == SILC_SERVER)
3338 silc_server_update_channels_by_server(server, user_data,
3341 /* Send notify about primary router going down to local operators */
3342 if (server->backup_router)
3343 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3344 SILC_NOTIFY_TYPE_NONE,
3345 ("%s switched to backup router %s "
3346 "(we are primary router now)",
3347 server->server_name, server->server_name));
3348 else if (server->router)
3349 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3350 SILC_NOTIFY_TYPE_NONE,
3351 ("%s switched to backup router %s",
3352 server->server_name,
3353 server->router->server_name));
3355 server->backup_noswitch = FALSE;
3358 silc_server_connection_free(idata->sconn);
3359 idata->sconn = NULL;
3363 if (idata->conn_type == SILC_CONN_SERVER) {
3364 server->stat.my_servers--;
3365 server->stat.servers--;
3366 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3367 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3368 server->stat.my_routers--;
3369 server->stat.routers--;
3370 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3372 if (server->server_type == SILC_ROUTER)
3373 server->stat.cell_servers--;
3375 /* Free the server entry */
3376 silc_server_backup_del(server, user_data);
3377 silc_server_backup_replaced_del(server, user_data);
3378 silc_idlist_del_data(user_data);
3379 if (!silc_idlist_del_server(server->local_list, user_data))
3380 silc_idlist_del_server(server->global_list, user_data);
3382 if (backup_router && backup_router != server->id_entry) {
3383 /* Announce all of our stuff that was created about 5 minutes ago.
3384 The backup router knows all the other stuff already. */
3385 if (server->server_type == SILC_ROUTER)
3386 silc_server_announce_servers(server, FALSE, time(0) - 300,
3387 backup_router->connection);
3389 /* Announce our clients and channels to the router */
3390 silc_server_announce_clients(server, time(0) - 300,
3391 backup_router->connection);
3392 silc_server_announce_channels(server, time(0) - 300,
3393 backup_router->connection);
3396 silc_packet_set_context(sock, NULL);
3402 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3404 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3407 if (server->router_conn == idata->sconn) {
3408 if (!server->no_reconnect)
3409 silc_server_create_connections(server);
3410 server->router_conn = NULL;
3413 silc_server_connection_free(idata->sconn);
3414 idata->sconn = NULL;
3416 silc_idlist_del_data(idata);
3418 silc_packet_set_context(sock, NULL);
3424 /* Removes client from all channels it has joined. This is used when client
3425 connection is disconnected. If the client on a channel is last, the
3426 channel is removed as well. This sends the SIGNOFF notify types. */
3428 void silc_server_remove_from_channels(SilcServer server,
3429 SilcPacketStream sock,
3430 SilcClientEntry client,
3432 const char *signoff_message,
3436 SilcChannelEntry channel;
3437 SilcChannelClientEntry chl;
3438 SilcHashTableList htl;
3439 SilcBuffer clidp = NULL;
3444 if (notify && !client->id)
3447 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3448 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3451 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3456 /* Remove the client from all channels. The client is removed from
3457 the channels' user list. */
3458 silc_hash_table_list(client->channels, &htl);
3459 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3460 channel = chl->channel;
3462 /* Remove channel if this is last client leaving the channel, unless
3463 the channel is permanent. */
3464 if (server->server_type != SILC_SERVER &&
3465 silc_hash_table_count(channel->user_list) < 2) {
3466 silc_server_channel_delete(server, channel);
3470 silc_hash_table_del(client->channels, channel);
3471 silc_hash_table_del(channel->user_list, client);
3472 channel->user_count--;
3474 /* If there is no global users on the channel anymore mark the channel
3475 as local channel. Do not check if the removed client is local client. */
3476 if (server->server_type == SILC_SERVER && channel->global_users &&
3477 chl->client->router && !silc_server_channel_has_global(channel))
3478 channel->global_users = FALSE;
3480 memset(chl, 'A', sizeof(*chl));
3483 /* Update statistics */
3484 if (SILC_IS_LOCAL(client))
3485 server->stat.my_chanclients--;
3486 if (server->server_type == SILC_ROUTER) {
3487 server->stat.cell_chanclients--;
3488 server->stat.chanclients--;
3491 /* If there is not at least one local user on the channel then we don't
3492 need the channel entry anymore, we can remove it safely, unless the
3493 channel is permanent channel */
3494 if (server->server_type == SILC_SERVER &&
3495 !silc_server_channel_has_local(channel)) {
3496 /* Notify about leaving client if this channel has global users. */
3497 if (notify && channel->global_users)
3498 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3499 SILC_NOTIFY_TYPE_SIGNOFF,
3500 signoff_message ? 2 : 1,
3501 clidp->data, silc_buffer_len(clidp),
3502 signoff_message, signoff_message ?
3503 strlen(signoff_message) : 0);
3505 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3506 silc_server_channel_delete(server, channel);
3510 /* Send notify to channel about client leaving SILC and channel too */
3512 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3513 SILC_NOTIFY_TYPE_SIGNOFF,
3514 signoff_message ? 2 : 1,
3515 clidp->data, silc_buffer_len(clidp),
3516 signoff_message, signoff_message ?
3517 strlen(signoff_message) : 0);
3519 if (killed && clidp) {
3520 /* Remove the client from channel's invite list */
3521 if (channel->invite_list &&
3522 silc_hash_table_count(channel->invite_list)) {
3524 SilcArgumentPayload iargs;
3525 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3526 silc_buffer_len(clidp), 3);
3527 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3528 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3529 silc_buffer_free(ab);
3530 silc_argument_payload_free(iargs);
3534 /* Don't create keys if we are shutting down */
3535 if (server->server_shutdown)
3538 /* Re-generate channel key if needed */
3539 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3540 if (!silc_server_create_channel_key(server, channel, 0))
3543 /* Send the channel key to the channel. The key of course is not sent
3544 to the client who was removed from the channel. */
3545 silc_server_send_channel_key(server, client->connection, channel,
3546 server->server_type == SILC_ROUTER ?
3547 FALSE : !server->standalone);
3551 silc_hash_table_list_reset(&htl);
3553 silc_buffer_free(clidp);
3556 /* Removes client from one channel. This is used for example when client
3557 calls LEAVE command to remove itself from the channel. Returns TRUE
3558 if channel still exists and FALSE if the channel is removed when
3559 last client leaves the channel. If `notify' is FALSE notify messages
3562 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3563 SilcPacketStream sock,
3564 SilcChannelEntry channel,
3565 SilcClientEntry client,
3568 SilcChannelClientEntry chl;
3571 SILC_LOG_DEBUG(("Removing %s from channel %s",
3572 silc_id_render(client->id, SILC_ID_CLIENT),
3573 channel->channel_name));
3575 /* Get the entry to the channel, if this client is not on the channel
3577 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3580 /* Remove channel if this is last client leaving the channel, unless
3581 the channel is permanent. */
3582 if (server->server_type != SILC_SERVER &&
3583 silc_hash_table_count(channel->user_list) < 2) {
3584 silc_server_channel_delete(server, channel);
3588 silc_hash_table_del(client->channels, channel);
3589 silc_hash_table_del(channel->user_list, client);
3590 channel->user_count--;
3592 /* If there is no global users on the channel anymore mark the channel
3593 as local channel. Do not check if the client is local client. */
3594 if (server->server_type == SILC_SERVER && channel->global_users &&
3595 chl->client->router && !silc_server_channel_has_global(channel))
3596 channel->global_users = FALSE;
3598 memset(chl, 'O', sizeof(*chl));
3601 /* Update statistics */
3602 if (SILC_IS_LOCAL(client))
3603 server->stat.my_chanclients--;
3604 if (server->server_type == SILC_ROUTER) {
3605 server->stat.cell_chanclients--;
3606 server->stat.chanclients--;
3609 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3613 /* If there is not at least one local user on the channel then we don't
3614 need the channel entry anymore, we can remove it safely, unless the
3615 channel is permanent channel */
3616 if (server->server_type == SILC_SERVER &&
3617 !silc_server_channel_has_local(channel)) {
3618 /* Notify about leaving client if this channel has global users. */
3619 if (notify && channel->global_users)
3620 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3621 SILC_NOTIFY_TYPE_LEAVE, 1,
3622 clidp->data, silc_buffer_len(clidp));
3624 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3625 silc_server_channel_delete(server, channel);
3626 silc_buffer_free(clidp);
3630 /* Send notify to channel about client leaving the channel */
3632 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3633 SILC_NOTIFY_TYPE_LEAVE, 1,
3634 clidp->data, silc_buffer_len(clidp));
3636 silc_buffer_free(clidp);
3640 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3641 function may be used only by router. In real SILC network all channels
3642 are created by routers thus this function is never used by normal
3645 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3646 SilcServerID *router_id,
3652 SilcChannelID *channel_id;
3653 SilcChannelEntry entry;
3654 SilcCipher send_key, receive_key;
3657 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3660 cipher = SILC_DEFAULT_CIPHER;
3662 hmac = SILC_DEFAULT_HMAC;
3664 /* Allocate cipher */
3665 if (!silc_cipher_alloc(cipher, &send_key))
3667 if (!silc_cipher_alloc(cipher, &receive_key)) {
3668 silc_cipher_free(send_key);
3673 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3674 silc_cipher_free(send_key);
3675 silc_cipher_free(receive_key);
3679 channel_name = strdup(channel_name);
3681 /* Create the channel ID */
3682 if (!silc_id_create_channel_id(server, router_id, server->rng,
3684 silc_free(channel_name);
3685 silc_cipher_free(send_key);
3686 silc_cipher_free(receive_key);
3687 silc_hmac_free(newhmac);
3691 /* Create the channel */
3692 entry = silc_idlist_add_channel(server->local_list, channel_name,
3693 SILC_CHANNEL_MODE_NONE, channel_id,
3694 NULL, send_key, receive_key, newhmac);
3696 silc_free(channel_name);
3697 silc_cipher_free(send_key);
3698 silc_cipher_free(receive_key);
3699 silc_hmac_free(newhmac);
3700 silc_free(channel_id);
3704 entry->cipher = strdup(cipher);
3705 entry->hmac_name = strdup(hmac);
3707 /* Now create the actual key material */
3708 if (!silc_server_create_channel_key(server, entry,
3709 silc_cipher_get_key_len(send_key) / 8)) {
3710 silc_idlist_del_channel(server->local_list, entry);
3714 /* Notify other routers about the new channel. We send the packet
3715 to our primary route. */
3717 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3718 channel_name, entry->id,
3719 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3722 /* Distribute to backup routers */
3723 if (broadcast && server->server_type == SILC_ROUTER) {
3725 unsigned char cid[32];
3726 SilcUInt32 name_len = strlen(channel_name);
3729 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3730 packet = silc_channel_payload_encode(channel_name, name_len,
3731 cid, id_len, entry->mode);
3732 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3733 packet->data, silc_buffer_len(packet), FALSE,
3735 silc_buffer_free(packet);
3738 server->stat.my_channels++;
3739 if (server->server_type == SILC_ROUTER) {
3740 server->stat.channels++;
3741 server->stat.cell_channels++;
3742 entry->users_resolved = TRUE;
3748 /* Same as above but creates the channel with Channel ID `channel_id. */
3751 silc_server_create_new_channel_with_id(SilcServer server,
3755 SilcChannelID *channel_id,
3758 SilcChannelEntry entry;
3759 SilcCipher send_key, receive_key;
3762 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3765 cipher = SILC_DEFAULT_CIPHER;
3767 hmac = SILC_DEFAULT_HMAC;
3769 /* Allocate cipher */
3770 if (!silc_cipher_alloc(cipher, &send_key))
3772 if (!silc_cipher_alloc(cipher, &receive_key)) {
3773 silc_cipher_free(send_key);
3778 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3779 silc_cipher_free(send_key);
3780 silc_cipher_free(receive_key);
3784 channel_name = strdup(channel_name);
3786 /* Create the channel */
3787 entry = silc_idlist_add_channel(server->local_list, channel_name,
3788 SILC_CHANNEL_MODE_NONE, channel_id,
3789 NULL, send_key, receive_key, newhmac);
3791 silc_cipher_free(send_key);
3792 silc_cipher_free(receive_key);
3793 silc_hmac_free(newhmac);
3794 silc_free(channel_name);
3798 /* Now create the actual key material */
3799 if (!silc_server_create_channel_key(server, entry,
3800 silc_cipher_get_key_len(send_key) / 8)) {
3801 silc_idlist_del_channel(server->local_list, entry);
3805 /* Notify other routers about the new channel. We send the packet
3806 to our primary route. */
3808 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3809 channel_name, entry->id,
3810 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3813 /* Distribute to backup routers */
3814 if (broadcast && server->server_type == SILC_ROUTER) {
3816 unsigned char cid[32];
3817 SilcUInt32 name_len = strlen(channel_name);
3820 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3821 packet = silc_channel_payload_encode(channel_name, name_len,
3822 cid, id_len, entry->mode);
3823 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3824 packet->data, silc_buffer_len(packet), FALSE,
3826 silc_buffer_free(packet);
3829 server->stat.my_channels++;
3830 if (server->server_type == SILC_ROUTER) {
3831 server->stat.channels++;
3832 server->stat.cell_channels++;
3833 entry->users_resolved = TRUE;
3839 /* Channel's key re-key timeout callback. */
3841 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3843 SilcServer server = app_context;
3844 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3848 /* Return now if we are shutting down */
3849 if (server->server_shutdown)
3852 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3855 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3858 /* Generates new channel key. This is used to create the initial channel key
3859 but also to re-generate new key for channel. If `key_len' is provided
3860 it is the bytes of the key length. */
3862 SilcBool silc_server_create_channel_key(SilcServer server,
3863 SilcChannelEntry channel,
3867 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3870 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3871 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3875 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3877 if (!channel->send_key)
3878 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3879 channel->send_key = NULL;
3882 if (!channel->receive_key)
3883 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3884 silc_cipher_free(channel->send_key);
3885 channel->send_key = channel->receive_key = NULL;
3891 else if (channel->key_len)
3892 len = channel->key_len / 8;
3894 len = silc_cipher_get_key_len(channel->send_key) / 8;
3896 /* Create channel key */
3897 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3900 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3901 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3903 /* Remove old key if exists */
3905 memset(channel->key, 0, channel->key_len / 8);
3906 silc_free(channel->key);
3910 channel->key_len = len * 8;
3911 channel->key = silc_memdup(channel_key, len);
3912 memset(channel_key, 0, sizeof(channel_key));
3914 /* Generate HMAC key from the channel key data and set it */
3916 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3917 memset(channel->key, 0, channel->key_len / 8);
3918 silc_free(channel->key);
3919 silc_cipher_free(channel->send_key);
3920 silc_cipher_free(channel->receive_key);
3921 channel->send_key = channel->receive_key = NULL;
3924 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3925 silc_hmac_set_key(channel->hmac, hash,
3926 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3927 memset(hash, 0, sizeof(hash));
3929 if (server->server_type == SILC_ROUTER) {
3930 if (!channel->rekey)
3931 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3932 channel->rekey->channel = channel;
3933 channel->rekey->key_len = key_len;
3934 if (channel->rekey->task)
3935 silc_schedule_task_del(server->schedule, channel->rekey->task);
3937 channel->rekey->task =
3938 silc_schedule_task_add_timeout(server->schedule,
3939 silc_server_channel_key_rekey,
3940 (void *)channel->rekey,
3941 server->config->channel_rekey_secs, 0);
3947 /* Saves the channel key found in the encoded `key_payload' buffer. This
3948 function is used when we receive Channel Key Payload and also when we're
3949 processing JOIN command reply. Returns entry to the channel. */
3951 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3952 SilcBuffer key_payload,
3953 SilcChannelEntry channel)
3955 SilcChannelKeyPayload payload = NULL;
3957 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3961 /* Decode channel key payload */
3962 payload = silc_channel_key_payload_parse(key_payload->data,
3963 silc_buffer_len(key_payload));
3965 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3970 /* Get the channel entry */
3973 /* Get channel ID */
3974 tmp = silc_channel_key_get_id(payload, &tmp_len);
3975 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3980 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3982 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3984 if (server->server_type == SILC_ROUTER)
3985 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3986 silc_id_render(&id, SILC_ID_CHANNEL)));
3992 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3994 tmp = silc_channel_key_get_key(payload, &tmp_len);
4000 cipher = silc_channel_key_get_cipher(payload, NULL);
4006 /* Remove old key if exists */
4008 memset(channel->key, 0, channel->key_len / 8);
4009 silc_free(channel->key);
4010 silc_cipher_free(channel->send_key);
4011 silc_cipher_free(channel->receive_key);
4014 /* Create new cipher */
4015 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
4016 channel->send_key = NULL;
4020 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
4021 silc_cipher_free(channel->send_key);
4022 channel->send_key = channel->receive_key = NULL;
4027 if (channel->cipher)
4028 silc_free(channel->cipher);
4029 channel->cipher = strdup(cipher);
4032 channel->key_len = tmp_len * 8;
4033 channel->key = silc_memdup(tmp, tmp_len);
4034 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
4035 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
4037 /* Generate HMAC key from the channel key data and set it */
4039 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4040 memset(channel->key, 0, channel->key_len / 8);
4041 silc_free(channel->key);
4042 silc_cipher_free(channel->send_key);
4043 silc_cipher_free(channel->receive_key);
4044 channel->send_key = channel->receive_key = NULL;
4047 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4048 silc_hmac_set_key(channel->hmac, hash,
4049 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4051 memset(hash, 0, sizeof(hash));
4052 memset(tmp, 0, tmp_len);
4054 if (server->server_type == SILC_ROUTER) {
4055 if (!channel->rekey)
4056 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4057 channel->rekey->channel = channel;
4058 if (channel->rekey->task)
4059 silc_schedule_task_del(server->schedule, channel->rekey->task);
4061 channel->rekey->task =
4062 silc_schedule_task_add_timeout(server->schedule,
4063 silc_server_channel_key_rekey,
4064 (void *)channel->rekey,
4065 server->config->channel_rekey_secs, 0);
4070 silc_channel_key_payload_free(payload);
4075 /* Returns assembled of all servers in the given ID list. The packet's
4076 form is dictated by the New ID payload. */
4078 static void silc_server_announce_get_servers(SilcServer server,
4079 SilcServerEntry remote,
4081 SilcBuffer *servers,
4082 unsigned long creation_time)
4085 SilcIDCacheEntry id_cache;
4086 SilcServerEntry entry;
4090 /* Go through all clients in the list */
4091 if (silc_idcache_get_all(id_list->servers, &list)) {
4092 silc_list_start(list);
4093 while ((id_cache = silc_list_get(list))) {
4094 entry = (SilcServerEntry)id_cache->context;
4096 /* Do not announce the one we've sending our announcements and
4097 do not announce ourself. Also check the creation time if it's
4099 if ((entry == remote) || (entry == server->id_entry) ||
4100 (creation_time && entry->data.created < creation_time))
4103 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4105 tmp = silc_buffer_realloc(*servers,
4107 silc_buffer_truelen((*servers)) +
4108 silc_buffer_len(idp) :
4109 silc_buffer_len(idp)));
4113 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4114 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4115 silc_buffer_pull(*servers, silc_buffer_len(idp));
4116 silc_buffer_free(idp);
4122 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4128 p = silc_notify_payload_encode(notify, argc, ap);
4134 /* This function is used by router to announce existing servers to our
4135 primary router when we've connected to it. If `creation_time' is non-zero
4136 then only the servers that has been created after the `creation_time'
4137 will be announced. */
4139 void silc_server_announce_servers(SilcServer server, SilcBool global,
4140 unsigned long creation_time,
4141 SilcPacketStream remote)
4143 SilcBuffer servers = NULL;
4145 SILC_LOG_DEBUG(("Announcing servers"));
4147 /* Get servers in local list */
4148 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4149 server->local_list, &servers,
4153 /* Get servers in global list */
4154 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4155 server->global_list, &servers,
4159 silc_buffer_push(servers, servers->data - servers->head);
4160 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4162 /* Send the packet */
4163 silc_server_packet_send(server, remote,
4164 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4165 servers->data, silc_buffer_len(servers));
4167 silc_buffer_free(servers);
4171 /* Returns assembled packet of all clients in the given ID list. The
4172 packet's form is dictated by the New ID Payload. */
4174 static void silc_server_announce_get_clients(SilcServer server,
4176 SilcBuffer *clients,
4178 unsigned long creation_time)
4181 SilcIDCacheEntry id_cache;
4182 SilcClientEntry client;
4185 unsigned char mode[4];
4188 /* Go through all clients in the list */
4189 if (silc_idcache_get_all(id_list->clients, &list)) {
4190 silc_list_start(list);
4191 while ((id_cache = silc_list_get(list))) {
4192 client = (SilcClientEntry)id_cache->context;
4194 if (creation_time && client->data.created < creation_time)
4196 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4198 if (!client->connection && !client->router)
4201 SILC_LOG_DEBUG(("Announce Client ID %s",
4202 silc_id_render(client->id, SILC_ID_CLIENT)));
4204 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4208 tmp2 = silc_buffer_realloc(*clients,
4210 silc_buffer_truelen((*clients)) +
4211 silc_buffer_len(idp) :
4212 silc_buffer_len(idp)));
4216 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4217 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4218 silc_buffer_pull(*clients, silc_buffer_len(idp));
4220 SILC_PUT32_MSB(client->mode, mode);
4222 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4223 2, idp->data, silc_buffer_len(idp),
4225 tmp2 = silc_buffer_realloc(*umodes,
4227 silc_buffer_truelen((*umodes)) +
4228 silc_buffer_len(tmp) :
4229 silc_buffer_len(tmp)));
4233 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4234 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4235 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4236 silc_buffer_free(tmp);
4238 silc_buffer_free(idp);
4243 /* This function is used to announce our existing clients to our router
4244 when we've connected to it. If `creation_time' is non-zero then only
4245 the clients that has been created after the `creation_time' will be
4248 void silc_server_announce_clients(SilcServer server,
4249 unsigned long creation_time,
4250 SilcPacketStream remote)
4252 SilcBuffer clients = NULL;
4253 SilcBuffer umodes = NULL;
4255 SILC_LOG_DEBUG(("Announcing clients"));
4257 /* Get clients in local list */
4258 silc_server_announce_get_clients(server, server->local_list,
4259 &clients, &umodes, creation_time);
4261 /* As router we announce our global list as well */
4262 if (server->server_type == SILC_ROUTER)
4263 silc_server_announce_get_clients(server, server->global_list,
4264 &clients, &umodes, creation_time);
4267 silc_buffer_push(clients, clients->data - clients->head);
4268 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4270 /* Send the packet */
4271 silc_server_packet_send(server, remote,
4272 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4273 clients->data, silc_buffer_len(clients));
4275 silc_buffer_free(clients);
4279 silc_buffer_push(umodes, umodes->data - umodes->head);
4280 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4282 /* Send the packet */
4283 silc_server_packet_send(server, remote,
4284 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4285 umodes->data, silc_buffer_len(umodes));
4287 silc_buffer_free(umodes);
4291 /* Returns channel's topic for announcing it */
4293 void silc_server_announce_get_channel_topic(SilcServer server,
4294 SilcChannelEntry channel,
4299 if (channel->topic) {
4300 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4301 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4303 silc_buffer_len(chidp),
4305 strlen(channel->topic));
4306 silc_buffer_free(chidp);
4310 /* Returns channel's invite and ban lists */
4312 void silc_server_announce_get_inviteban(SilcServer server,
4313 SilcChannelEntry channel,
4317 SilcBuffer list, idp, idp2, tmp2;
4320 SilcHashTableList htl;
4321 const unsigned char a[1] = { 0x03 };
4323 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4325 /* Encode invite list */
4326 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4327 list = silc_buffer_alloc_size(2);
4328 type = silc_hash_table_count(channel->invite_list);
4329 SILC_PUT16_MSB(type, list->data);
4330 silc_hash_table_list(channel->invite_list, &htl);
4331 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4332 list = silc_argument_payload_encode_one(list, tmp2->data,
4333 silc_buffer_len(tmp2),
4334 SILC_PTR_TO_32(ptype));
4335 silc_hash_table_list_reset(&htl);
4337 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4339 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4340 idp->data, silc_buffer_len(idp),
4341 channel->channel_name,
4342 strlen(channel->channel_name),
4343 idp2->data, silc_buffer_len(idp2),
4345 list->data, silc_buffer_len(list));
4346 silc_buffer_free(idp2);
4347 silc_buffer_free(list);
4350 /* Encode ban list */
4351 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4352 list = silc_buffer_alloc_size(2);
4353 type = silc_hash_table_count(channel->ban_list);
4354 SILC_PUT16_MSB(type, list->data);
4355 silc_hash_table_list(channel->ban_list, &htl);
4356 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4357 list = silc_argument_payload_encode_one(list, tmp2->data,
4358 silc_buffer_len(tmp2),
4359 SILC_PTR_TO_32(ptype));
4360 silc_hash_table_list_reset(&htl);
4363 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4364 idp->data, silc_buffer_len(idp),
4366 list->data, silc_buffer_len(list));
4367 silc_buffer_free(list);
4370 silc_buffer_free(idp);
4373 /* Returns assembled packets for channel users of the `channel'. */
4375 void silc_server_announce_get_channel_users(SilcServer server,
4376 SilcChannelEntry channel,
4377 SilcBuffer *channel_modes,
4378 SilcBuffer *channel_users,
4379 SilcBuffer *channel_users_modes)
4381 SilcChannelClientEntry chl;
4382 SilcHashTableList htl;
4383 SilcBuffer chidp, clidp, csidp;
4384 SilcBuffer tmp, fkey = NULL, chpklist;
4386 unsigned char mode[4], ulimit[4];
4390 SILC_LOG_DEBUG(("Start"));
4392 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4393 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4394 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4397 SILC_PUT32_MSB(channel->mode, mode);
4398 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4399 SILC_PUT32_MSB(channel->user_limit, ulimit);
4400 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4401 if (channel->founder_key)
4402 fkey = silc_public_key_payload_encode(channel->founder_key);
4404 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4406 silc_buffer_len(csidp),
4409 hmac, hmac ? strlen(hmac) : 0,
4410 channel->passphrase,
4411 channel->passphrase ?
4412 strlen(channel->passphrase) : 0,
4413 fkey ? fkey->data : NULL,
4414 fkey ? silc_buffer_len(fkey) : 0,
4415 chpklist ? chpklist->data : NULL,
4417 silc_buffer_len(chpklist) : 0,
4419 SILC_CHANNEL_MODE_ULIMIT ?
4422 SILC_CHANNEL_MODE_ULIMIT ?
4423 sizeof(ulimit) : 0));
4424 len = silc_buffer_len(tmp);
4426 silc_buffer_realloc(*channel_modes,
4428 silc_buffer_truelen((*channel_modes)) + len : len));
4431 *channel_modes = tmp2;
4432 silc_buffer_pull_tail(*channel_modes,
4433 ((*channel_modes)->end -
4434 (*channel_modes)->data));
4435 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4436 silc_buffer_pull(*channel_modes, len);
4437 silc_buffer_free(tmp);
4438 silc_buffer_free(fkey);
4441 /* Now find all users on the channel */
4442 silc_hash_table_list(channel->user_list, &htl);
4443 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4444 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4446 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4450 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4452 silc_buffer_len(clidp),
4454 silc_buffer_len(chidp));
4455 len = silc_buffer_len(tmp);
4457 silc_buffer_realloc(*channel_users,
4459 silc_buffer_truelen((*channel_users)) + len : len));
4462 *channel_users = tmp2;
4463 silc_buffer_pull_tail(*channel_users,
4464 ((*channel_users)->end -
4465 (*channel_users)->data));
4467 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4468 silc_buffer_pull(*channel_users, len);
4469 silc_buffer_free(tmp);
4471 /* CUMODE notify for mode change on the channel */
4472 SILC_PUT32_MSB(chl->mode, mode);
4473 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4474 fkey = silc_public_key_payload_encode(channel->founder_key);
4475 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4477 silc_buffer_len(csidp),
4480 silc_buffer_len(clidp),
4481 fkey ? fkey->data : NULL,
4482 fkey ? silc_buffer_len(fkey) : 0);
4483 len = silc_buffer_len(tmp);
4485 silc_buffer_realloc(*channel_users_modes,
4486 (*channel_users_modes ?
4487 silc_buffer_truelen((*channel_users_modes)) +
4491 *channel_users_modes = tmp2;
4492 silc_buffer_pull_tail(*channel_users_modes,
4493 ((*channel_users_modes)->end -
4494 (*channel_users_modes)->data));
4496 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4497 silc_buffer_pull(*channel_users_modes, len);
4498 silc_buffer_free(tmp);
4499 silc_buffer_free(fkey);
4501 silc_buffer_free(clidp);
4503 silc_hash_table_list_reset(&htl);
4504 silc_buffer_free(chidp);
4505 silc_buffer_free(csidp);
4508 /* Returns assembled packets for all channels and users on those channels
4509 from the given ID List. The packets are in the form dictated by the
4510 New Channel and New Channel User payloads. */
4512 void silc_server_announce_get_channels(SilcServer server,
4514 SilcBuffer *channels,
4515 SilcBuffer **channel_modes,
4516 SilcBuffer *channel_users,
4517 SilcBuffer **channel_users_modes,
4518 SilcUInt32 *channel_users_modes_c,
4519 SilcBuffer **channel_topics,
4520 SilcBuffer **channel_invites,
4521 SilcBuffer **channel_bans,
4522 SilcChannelID ***channel_ids,
4523 unsigned long creation_time)
4526 SilcIDCacheEntry id_cache;
4527 SilcChannelEntry channel;
4528 unsigned char cid[32];
4530 SilcUInt16 name_len;
4532 int i = *channel_users_modes_c;
4536 SILC_LOG_DEBUG(("Start"));
4538 /* Go through all channels in the list */
4539 if (silc_idcache_get_all(id_list->channels, &list)) {
4540 silc_list_start(list);
4541 while ((id_cache = silc_list_get(list))) {
4542 channel = (SilcChannelEntry)id_cache->context;
4544 if (creation_time && channel->created < creation_time)
4549 SILC_LOG_DEBUG(("Announce Channel ID %s",
4550 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4552 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4553 name_len = strlen(channel->channel_name);
4556 len = 4 + name_len + id_len + 4;
4558 silc_buffer_realloc(*channels,
4560 silc_buffer_truelen((*channels)) +
4566 silc_buffer_pull_tail(*channels,
4567 ((*channels)->end - (*channels)->data));
4568 silc_buffer_format(*channels,
4569 SILC_STR_UI_SHORT(name_len),
4570 SILC_STR_UI_XNSTRING(channel->channel_name,
4572 SILC_STR_UI_SHORT(id_len),
4573 SILC_STR_UI_XNSTRING(cid, id_len),
4574 SILC_STR_UI_INT(channel->mode),
4576 silc_buffer_pull(*channels, len);
4579 if (creation_time && channel->updated < creation_time)
4585 /* Channel user modes */
4586 tmp = silc_realloc(*channel_users_modes,
4587 sizeof(**channel_users_modes) * (i + 1));
4590 *channel_users_modes = tmp;
4591 (*channel_users_modes)[i] = NULL;
4592 tmp = silc_realloc(*channel_modes,
4593 sizeof(**channel_modes) * (i + 1));
4596 *channel_modes = tmp;
4597 (*channel_modes)[i] = NULL;
4598 tmp = silc_realloc(*channel_ids,
4599 sizeof(**channel_ids) * (i + 1));
4603 (*channel_ids)[i] = NULL;
4604 silc_server_announce_get_channel_users(server, channel,
4605 &(*channel_modes)[i],
4607 &(*channel_users_modes)[i]);
4608 (*channel_ids)[i] = channel->id;
4610 /* Channel's topic */
4611 tmp = silc_realloc(*channel_topics,
4612 sizeof(**channel_topics) * (i + 1));
4615 *channel_topics = tmp;
4616 (*channel_topics)[i] = NULL;
4617 silc_server_announce_get_channel_topic(server, channel,
4618 &(*channel_topics)[i]);
4620 /* Channel's invite and ban list */
4621 tmp = silc_realloc(*channel_invites,
4622 sizeof(**channel_invites) * (i + 1));
4625 *channel_invites = tmp;
4626 (*channel_invites)[i] = NULL;
4627 tmp = silc_realloc(*channel_bans,
4628 sizeof(**channel_bans) * (i + 1));
4631 *channel_bans = tmp;
4632 (*channel_bans)[i] = NULL;
4633 silc_server_announce_get_inviteban(server, channel,
4634 &(*channel_invites)[i],
4635 &(*channel_bans)[i]);
4637 (*channel_users_modes_c)++;
4645 /* This function is used to announce our existing channels to our router
4646 when we've connected to it. This also announces the users on the
4647 channels to the router. If the `creation_time' is non-zero only the
4648 channels that was created after the `creation_time' are announced.
4649 Note that the channel users are still announced even if the `creation_time'
4652 void silc_server_announce_channels(SilcServer server,
4653 unsigned long creation_time,
4654 SilcPacketStream remote)
4656 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4657 SilcBuffer *channel_users_modes = NULL;
4658 SilcBuffer *channel_topics = NULL;
4659 SilcBuffer *channel_invites = NULL;
4660 SilcBuffer *channel_bans = NULL;
4661 SilcUInt32 channel_users_modes_c = 0;
4662 SilcChannelID **channel_ids = NULL;
4664 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4666 /* Get channels and channel users in local list */
4667 silc_server_announce_get_channels(server, server->local_list,
4668 &channels, &channel_modes,
4670 &channel_users_modes,
4671 &channel_users_modes_c,
4675 &channel_ids, creation_time);
4677 /* Get channels and channel users in global list */
4678 if (server->server_type != SILC_SERVER)
4679 silc_server_announce_get_channels(server, server->global_list,
4680 &channels, &channel_modes,
4682 &channel_users_modes,
4683 &channel_users_modes_c,
4687 &channel_ids, creation_time);
4690 silc_buffer_push(channels, channels->data - channels->head);
4691 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4693 /* Send the packet */
4694 silc_server_packet_send(server, remote,
4695 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4696 channels->data, silc_buffer_len(channels));
4698 silc_buffer_free(channels);
4701 if (channel_users) {
4702 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4703 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4704 silc_buffer_len(channel_users));
4706 /* Send the packet */
4707 silc_server_packet_send(server, remote,
4708 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4709 channel_users->data, silc_buffer_len(channel_users));
4711 silc_buffer_free(channel_users);
4714 if (channel_modes) {
4717 for (i = 0; i < channel_users_modes_c; i++) {
4718 if (!channel_modes[i])
4720 silc_buffer_push(channel_modes[i],
4721 channel_modes[i]->data -
4722 channel_modes[i]->head);
4723 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4724 silc_buffer_len(channel_modes[i]));
4725 silc_server_packet_send_dest(server, remote,
4726 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4727 channel_ids[i], SILC_ID_CHANNEL,
4728 channel_modes[i]->data,
4729 silc_buffer_len(channel_modes[i]));
4730 silc_buffer_free(channel_modes[i]);
4732 silc_free(channel_modes);
4735 if (channel_users_modes) {
4738 for (i = 0; i < channel_users_modes_c; i++) {
4739 if (!channel_users_modes[i])
4741 silc_buffer_push(channel_users_modes[i],
4742 channel_users_modes[i]->data -
4743 channel_users_modes[i]->head);
4744 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4745 silc_buffer_len(channel_users_modes[i]));
4746 silc_server_packet_send_dest(server, remote,
4747 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4748 channel_ids[i], SILC_ID_CHANNEL,
4749 channel_users_modes[i]->data,
4750 silc_buffer_len(channel_users_modes[i]));
4751 silc_buffer_free(channel_users_modes[i]);
4753 silc_free(channel_users_modes);
4756 if (channel_topics) {
4759 for (i = 0; i < channel_users_modes_c; i++) {
4760 if (!channel_topics[i])
4763 silc_buffer_push(channel_topics[i],
4764 channel_topics[i]->data -
4765 channel_topics[i]->head);
4766 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4767 silc_buffer_len(channel_topics[i]));
4768 silc_server_packet_send_dest(server, remote,
4769 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4770 channel_ids[i], SILC_ID_CHANNEL,
4771 channel_topics[i]->data,
4772 silc_buffer_len(channel_topics[i]));
4773 silc_buffer_free(channel_topics[i]);
4775 silc_free(channel_topics);
4778 if (channel_invites) {
4781 for (i = 0; i < channel_users_modes_c; i++) {
4782 if (!channel_invites[i])
4785 silc_buffer_push(channel_invites[i],
4786 channel_invites[i]->data -
4787 channel_invites[i]->head);
4788 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4789 silc_buffer_len(channel_invites[i]));
4790 silc_server_packet_send_dest(server, remote,
4791 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4792 channel_ids[i], SILC_ID_CHANNEL,
4793 channel_invites[i]->data,
4794 silc_buffer_len(channel_invites[i]));
4795 silc_buffer_free(channel_invites[i]);
4797 silc_free(channel_invites);
4803 for (i = 0; i < channel_users_modes_c; i++) {
4804 if (!channel_bans[i])
4807 silc_buffer_push(channel_bans[i],
4808 channel_bans[i]->data -
4809 channel_bans[i]->head);
4810 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4811 silc_buffer_len(channel_bans[i]));
4812 silc_server_packet_send_dest(server, remote,
4813 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4814 channel_ids[i], SILC_ID_CHANNEL,
4815 channel_bans[i]->data,
4816 silc_buffer_len(channel_bans[i]));
4817 silc_buffer_free(channel_bans[i]);
4819 silc_free(channel_bans);
4822 silc_free(channel_ids);
4825 /* Announces WATCH list. */
4827 void silc_server_announce_watches(SilcServer server,
4828 SilcPacketStream remote)
4830 SilcHashTableList htl;
4831 SilcBuffer buffer, idp, args, pkp;
4832 SilcClientEntry client;
4835 SILC_LOG_DEBUG(("Announcing watch list"));
4837 /* XXX because way we save the nicks (hash) we cannot announce them. */
4839 /* XXX we should send all public keys in one command if client is
4840 watching more than one key */
4841 silc_hash_table_list(server->watcher_list_pk, &htl);
4842 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4843 if (!client || !client->id)
4846 server->stat.commands_sent++;
4848 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4849 args = silc_buffer_alloc_size(2);
4850 silc_buffer_format(args,
4851 SILC_STR_UI_SHORT(1),
4853 pkp = silc_public_key_payload_encode(key);
4854 args = silc_argument_payload_encode_one(args, pkp->data,
4855 silc_buffer_len(pkp), 0x00);
4856 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4857 ++server->cmd_ident, 2,
4858 1, idp->data, silc_buffer_len(idp),
4860 silc_buffer_len(args));
4863 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4864 buffer->data, silc_buffer_len(buffer));
4866 silc_buffer_free(pkp);
4867 silc_buffer_free(args);
4868 silc_buffer_free(idp);
4869 silc_buffer_free(buffer);
4871 silc_hash_table_list_reset(&htl);
4874 /* Assembles user list and users mode list from the `channel'. */
4876 SilcBool silc_server_get_users_on_channel(SilcServer server,
4877 SilcChannelEntry channel,
4878 SilcBuffer *user_list,
4879 SilcBuffer *mode_list,
4880 SilcUInt32 *user_count)
4882 SilcChannelClientEntry chl;
4883 SilcHashTableList htl;
4884 SilcBuffer client_id_list;
4885 SilcBuffer client_mode_list;
4887 SilcUInt32 list_count = 0, len = 0;
4889 if (!silc_hash_table_count(channel->user_list))
4892 silc_hash_table_list(channel->user_list, &htl);
4893 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4894 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4895 silc_hash_table_list_reset(&htl);
4897 client_id_list = silc_buffer_alloc(len);
4899 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4900 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4901 silc_buffer_pull_tail(client_mode_list,
4902 silc_buffer_truelen(client_mode_list));
4904 silc_hash_table_list(channel->user_list, &htl);
4905 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4907 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4908 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4909 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4910 silc_buffer_free(idp);
4912 /* Client's mode on channel */
4913 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4914 silc_buffer_pull(client_mode_list, 4);
4918 silc_hash_table_list_reset(&htl);
4919 silc_buffer_push(client_id_list,
4920 client_id_list->data - client_id_list->head);
4921 silc_buffer_push(client_mode_list,
4922 client_mode_list->data - client_mode_list->head);
4924 *user_list = client_id_list;
4925 *mode_list = client_mode_list;
4926 *user_count = list_count;
4930 /* Saves users and their modes to the `channel'. */
4932 void silc_server_save_users_on_channel(SilcServer server,
4933 SilcPacketStream sock,
4934 SilcChannelEntry channel,
4935 SilcClientID *noadd,
4936 SilcBuffer user_list,
4937 SilcBuffer mode_list,
4938 SilcUInt32 user_count)
4944 SilcClientEntry client;
4945 SilcIDCacheEntry cache;
4946 SilcChannelClientEntry chl;
4948 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4949 channel->channel_name));
4951 for (i = 0; i < user_count; i++) {
4953 SILC_GET16_MSB(idp_len, user_list->data + 2);
4955 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4957 silc_buffer_pull(user_list, idp_len);
4960 SILC_GET32_MSB(mode, mode_list->data);
4961 silc_buffer_pull(mode_list, 4);
4963 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4968 /* Check if we have this client cached already. */
4969 client = silc_idlist_find_client_by_id(server->local_list,
4971 server->server_type, &cache);
4973 client = silc_idlist_find_client_by_id(server->global_list,
4975 server->server_type, &cache);
4977 /* If router did not find such Client ID in its lists then this must
4978 be bogus client or some router in the net is buggy. */
4979 if (server->server_type != SILC_SERVER)
4982 /* We don't have that client anywhere, add it. The client is added
4983 to global list since server didn't have it in the lists so it must be
4985 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4986 silc_id_dup(&id.u.client_id,
4988 silc_packet_get_context(sock),
4991 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4995 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4998 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4999 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5000 "%s", channel->channel_name));
5004 if (!silc_server_client_on_channel(client, channel, &chl)) {
5005 /* Client was not on the channel, add it. */
5006 chl = silc_calloc(1, sizeof(*chl));
5007 chl->client = client;
5009 chl->channel = channel;
5010 silc_hash_table_add(channel->user_list, chl->client, chl);
5011 silc_hash_table_add(client->channels, chl->channel, chl);
5012 channel->user_count++;
5020 /* Saves channels and channels user modes to the `client'. Removes
5021 the client from those channels that are not sent in the list but
5024 void silc_server_save_user_channels(SilcServer server,
5025 SilcPacketStream sock,
5026 SilcClientEntry client,
5027 SilcBuffer channels,
5028 SilcBuffer channels_user_modes)
5031 SilcUInt32 *chumodes;
5032 SilcChannelPayload entry;
5033 SilcChannelEntry channel;
5034 SilcChannelID channel_id;
5035 SilcChannelClientEntry chl;
5036 SilcHashTable ht = NULL;
5037 SilcHashTableList htl;
5041 if (!channels || !channels_user_modes ||
5042 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5045 ch = silc_channel_payload_parse_list(channels->data,
5046 silc_buffer_len(channels));
5047 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5049 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5050 NULL, NULL, NULL, TRUE);
5051 silc_dlist_start(ch);
5052 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5053 /* Check if we have this channel, and add it if we don't have it.
5054 Also add the client on the channel unless it is there already. */
5055 if (!silc_channel_get_id_parse(entry, &channel_id))
5057 channel = silc_idlist_find_channel_by_id(server->local_list,
5060 channel = silc_idlist_find_channel_by_id(server->global_list,
5063 if (server->server_type != SILC_SERVER) {
5068 /* We don't have that channel anywhere, add it. */
5069 name = silc_channel_get_name(entry, NULL);
5070 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5071 silc_id_dup(&channel_id,
5073 server->router, NULL, NULL, 0);
5080 channel->mode = silc_channel_get_mode(entry);
5082 /* Add the client on the channel */
5083 if (!silc_server_client_on_channel(client, channel, &chl)) {
5084 chl = silc_calloc(1, sizeof(*chl));
5085 chl->client = client;
5086 chl->mode = chumodes[i++];
5087 chl->channel = channel;
5088 silc_hash_table_add(channel->user_list, chl->client, chl);
5089 silc_hash_table_add(client->channels, chl->channel, chl);
5090 channel->user_count++;
5093 chl->mode = chumodes[i++];
5096 silc_hash_table_add(ht, channel, channel);
5098 silc_channel_payload_list_free(ch);
5099 silc_free(chumodes);
5103 /* Go through the list again and remove client from channels that
5104 are no part of the list. */
5106 silc_hash_table_list(client->channels, &htl);
5107 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5108 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5109 silc_hash_table_del(chl->channel->user_list, chl->client);
5110 silc_hash_table_del(chl->client->channels, chl->channel);
5114 silc_hash_table_list_reset(&htl);
5115 silc_hash_table_free(ht);
5117 silc_hash_table_list(client->channels, &htl);
5118 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5119 silc_hash_table_del(chl->channel->user_list, chl->client);
5120 silc_hash_table_del(chl->client->channels, chl->channel);
5123 silc_hash_table_list_reset(&htl);
5127 /* Lookups route to the client indicated by the `id_data'. The connection
5128 object and internal data object is returned. Returns NULL if route
5129 could not be found to the client. If the `client_id' is specified then
5130 it is used and the `id_data' is ignored. */
5133 silc_server_get_client_route(SilcServer server,
5134 unsigned char *id_data,
5136 SilcClientID *client_id,
5137 SilcIDListData *idata,
5138 SilcClientEntry *client_entry)
5140 SilcClientID *id, clid;
5141 SilcClientEntry client;
5143 SILC_LOG_DEBUG(("Start"));
5146 *client_entry = NULL;
5148 /* Decode destination Client ID */
5150 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5152 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5154 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5157 /* If the destination belongs to our server we don't have to route
5158 the packet anywhere but to send it to the local destination. */
5159 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5163 /* If we are router and the client has router then the client is in
5164 our cell but not directly connected to us. */
5165 if (server->server_type == SILC_ROUTER && client->router) {
5166 /* We are of course in this case the client's router thus the route
5167 to the client is the server who owns the client. So, we will send
5168 the packet to that server. */
5170 *idata = (SilcIDListData)client->router;
5171 return client->router->connection;
5174 /* Seems that client really is directly connected to us */
5176 *idata = (SilcIDListData)client;
5178 *client_entry = client;
5179 return client->connection;
5182 /* Destination belongs to someone not in this server. If we are normal
5183 server our action is to send the packet to our router. */
5184 if (server->server_type != SILC_ROUTER && !server->standalone) {
5187 *idata = (SilcIDListData)server->router;
5188 return SILC_PRIMARY_ROUTE(server);
5191 /* We are router and we will perform route lookup for the destination
5192 and send the packet to fastest route. */
5193 if (server->server_type == SILC_ROUTER && !server->standalone) {
5194 /* Check first that the ID is valid */
5195 client = silc_idlist_find_client_by_id(server->global_list, id,
5198 SilcPacketStream dst_sock;
5200 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5203 if (idata && dst_sock)
5204 *idata = silc_packet_get_context(dst_sock);
5213 /* Encodes and returns channel list of channels the `client' has joined.
5214 Secret channels are not put to the list. */
5216 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5217 SilcClientEntry client,
5218 SilcBool get_private,
5219 SilcBool get_secret,
5220 SilcBuffer *user_mode_list)
5222 SilcBuffer buffer = NULL;
5223 SilcChannelEntry channel;
5224 SilcChannelClientEntry chl;
5225 SilcHashTableList htl;
5226 unsigned char cid[32];
5228 SilcUInt16 name_len;
5232 *user_mode_list = NULL;
5234 silc_hash_table_list(client->channels, &htl);
5235 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5236 channel = chl->channel;
5238 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5240 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5243 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5244 name_len = strlen(channel->channel_name);
5246 len = 4 + name_len + id_len + 4;
5247 buffer = silc_buffer_realloc(buffer,
5249 silc_buffer_truelen(buffer) + len : len));
5250 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5251 silc_buffer_format(buffer,
5252 SILC_STR_UI_SHORT(name_len),
5253 SILC_STR_DATA(channel->channel_name, name_len),
5254 SILC_STR_UI_SHORT(id_len),
5255 SILC_STR_DATA(cid, id_len),
5256 SILC_STR_UI_INT(chl->channel->mode),
5258 silc_buffer_pull(buffer, len);
5260 if (user_mode_list) {
5262 silc_buffer_realloc(*user_mode_list,
5264 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5265 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5266 (*user_mode_list)->data));
5267 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5268 silc_buffer_pull(*user_mode_list, 4);
5271 silc_hash_table_list_reset(&htl);
5274 silc_buffer_push(buffer, buffer->data - buffer->head);
5275 if (user_mode_list && *user_mode_list)
5276 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5277 (*user_mode_list)->head));
5282 /* Task callback used to retrieve network statistical information from
5283 router server once in a while. */
5285 SILC_TASK_CALLBACK(silc_server_get_stats)
5287 SilcServer server = (SilcServer)context;
5288 SilcBuffer idp, packet;
5290 if (!server->standalone) {
5291 SILC_LOG_DEBUG(("Retrieving stats from router"));
5292 server->stat.commands_sent++;
5293 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5295 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5296 ++server->cmd_ident, 1,
5298 silc_buffer_len(idp));
5299 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5300 SILC_PACKET_COMMAND, 0, packet->data,
5301 silc_buffer_len(packet));
5302 silc_buffer_free(packet);
5303 silc_buffer_free(idp);
5307 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,