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 && 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 && 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 && 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, stream,
285 silc_rng_get_byte(server->rng) % 5, 0);
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);
707 silc_free(server->id);
710 silc_hmac_unregister_all();
711 silc_hash_unregister_all();
712 silc_cipher_unregister_all();
713 silc_pkcs_unregister_all();
716 /* Creates a new server listener. */
718 static SilcNetListener
719 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
721 SilcNetListener listener;
724 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
725 server->config->require_reverse_lookup,
727 silc_server_accept_new_connection, server);
729 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
737 /* Adds a secondary listener. */
739 SilcBool silc_server_init_secondary(SilcServer server)
741 SilcServerConfigServerInfoInterface *interface;
742 SilcNetListener listener;
744 for (interface = server->config->server_info->secondary; interface;
745 interface = interface->next) {
746 listener = silc_server_listen(server, interface->server_ip,
750 silc_dlist_add(server->listeners, listener);
756 /* Initializes the entire SILC server. This is called always before running
757 the server. This is called only once at the initialization of the program.
758 This binds the server to its listenning port. After this function returns
759 one should call silc_server_run to start the server. This returns TRUE
760 when everything is ok to run the server. Configuration file must be
761 read and parsed before calling this. */
763 SilcBool silc_server_init(SilcServer server)
766 SilcServerEntry id_entry;
767 SilcNetListener listener;
771 SILC_LOG_DEBUG(("Initializing server"));
773 server->starttime = time(NULL);
775 /* Take config object for us */
776 silc_server_config_ref(&server->config_ref, server->config,
780 /* Set debugging on if configured */
781 if (server->config->debug_string) {
782 silc_log_debug(TRUE);
783 silc_log_set_debug_string(server->config->debug_string);
785 #endif /* SILC_DEBUG */
787 /* Steal public and private key from the config object */
788 server->public_key = server->config->server_info->public_key;
789 server->private_key = server->config->server_info->private_key;
790 server->config->server_info->public_key = NULL;
791 server->config->server_info->private_key = NULL;
793 /* Register all configured ciphers, PKCS and hash functions. */
794 if (!silc_server_config_register_ciphers(server))
795 silc_cipher_register_default();
796 if (!silc_server_config_register_pkcs(server))
797 silc_pkcs_register_default();
798 if (!silc_server_config_register_hashfuncs(server))
799 silc_hash_register_default();
800 if (!silc_server_config_register_hmacs(server))
801 silc_hmac_register_default();
803 /* Initialize random number generator for the server. */
804 server->rng = silc_rng_alloc();
805 silc_rng_init(server->rng);
806 silc_rng_global_init(server->rng);
808 /* Initialize hash functions for server to use */
809 silc_hash_alloc("md5", &server->md5hash);
810 silc_hash_alloc("sha1", &server->sha1hash);
812 /* Initialize the scheduler */
813 server->schedule = silc_schedule_init(server->config->param.connections_max,
815 if (!server->schedule)
818 /* First, register log files configuration for error output */
819 silc_server_config_setlogfiles(server);
821 /* Initialize ID caches */
822 server->local_list->clients =
823 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
825 server->local_list->servers =
826 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
828 server->local_list->channels =
829 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
832 /* These are allocated for normal server as well as these hold some
833 global information that the server has fetched from its router. For
834 router these are used as they are supposed to be used on router. */
835 server->global_list->clients =
836 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
838 server->global_list->servers =
839 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
841 server->global_list->channels =
842 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
845 /* Init watcher lists */
846 server->watcher_list =
847 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
848 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
850 if (!server->watcher_list)
852 server->watcher_list_pk =
853 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
854 silc_hash_public_key_compare, NULL,
856 if (!server->watcher_list_pk)
859 /* Create TCP listener */
860 listener = silc_server_listen(
862 server->config->server_info->primary == NULL ? NULL :
863 server->config->server_info->primary->server_ip,
864 server->config->server_info->primary == NULL ? 0 :
865 server->config->server_info->primary->port);
868 silc_dlist_add(server->listeners, listener);
870 /* Create a Server ID for the server. */
871 port = silc_net_listener_get_port(listener, NULL);
872 ip = silc_net_listener_get_ip(listener, NULL);
873 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
874 server->config->server_info->primary->public_ip :
875 ip[0], port[0], server->rng, &id);
884 server->server_name = server->config->server_info->server_name;
885 server->config->server_info->server_name = NULL;
886 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
887 sizeof(server->id_string), &server->id_string_len);
889 /* Add ourselves to the server list. We don't have a router yet
890 beacuse we haven't established a route yet. It will be done later.
891 For now, NULL is sent as router. This allocates new entry to
894 silc_idlist_add_server(server->local_list, strdup(server->server_name),
896 silc_id_dup(server->id, SILC_ID_SERVER),
899 SILC_LOG_ERROR(("Could not add local server to cache"));
902 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
903 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
904 SILC_CONN_SERVER : SILC_CONN_ROUTER);
905 server->id_entry = id_entry;
907 /* Create secondary TCP listeners */
908 if (silc_server_init_secondary(server) == FALSE)
911 server->listenning = TRUE;
913 /* Create connections to configured routers. */
914 silc_server_create_connections(server);
916 /* If server connections has been configured then we must be router as
917 normal server cannot have server connections, only router connections. */
918 if (server->config->servers) {
919 SilcServerConfigServer *ptr = server->config->servers;
921 server->server_type = SILC_ROUTER;
923 if (ptr->backup_router) {
924 server->server_type = SILC_BACKUP_ROUTER;
925 server->backup_router = TRUE;
926 server->id_entry->server_type = SILC_BACKUP_ROUTER;
933 if (server->server_type != SILC_ROUTER) {
934 server->stat.servers = 1;
935 server->stat.cell_servers = 1;
937 server->stat.routers = 1;
940 /* If we are normal server we'll retrieve network statisticial information
941 once in a while from the router. */
942 if (server->server_type != SILC_ROUTER)
943 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
946 /* Start packet engine */
947 server->packet_engine =
948 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
949 &silc_server_stream_cbs, server);
950 if (!server->packet_engine)
953 /* Register client entry expiration timeout */
954 silc_schedule_task_add_timeout(server->schedule,
955 silc_server_purge_expired_clients, server,
958 /* Initialize HTTP server */
959 silc_server_http_init(server);
961 SILC_LOG_DEBUG(("Server initialized"));
963 /* We are done here, return succesfully */
967 silc_server_config_unref(&server->config_ref);
971 /* Task callback to close a socket connection after rehash */
973 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
975 SilcServer server = app_context;
976 SilcPacketStream sock = context;
977 SilcIDListData idata = silc_packet_get_context(sock);
978 const char *hostname;
981 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
982 NULL, &hostname, NULL, &port);
984 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
985 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
986 silc_schedule_task_del_by_context(server->schedule, sock);
987 silc_server_disconnect_remote(server, sock,
988 SILC_STATUS_ERR_BANNED_FROM_SERVER,
989 "This connection is removed from "
991 silc_server_free_sock_user_data(server, sock, NULL);
994 /* This function basically reads the config file again and switches the config
995 object pointed by the server object. After that, we have to fix various
996 things such as the server_name and the listening ports.
997 Keep in mind that we no longer have the root privileges at this point. */
999 SilcBool silc_server_rehash(SilcServer server)
1001 SilcServerConfig newconfig;
1003 SILC_LOG_INFO(("Rehashing server"));
1005 /* Reset the logging system */
1006 silc_log_quick(TRUE);
1007 silc_log_flush_all();
1009 /* Start the main rehash phase (read again the config file) */
1010 newconfig = silc_server_config_alloc(server->config_file, server);
1012 SILC_LOG_ERROR(("Rehash FAILED."));
1016 /* Fix the server_name field */
1017 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1018 silc_free(server->server_name);
1020 /* Check server name */
1021 server->server_name =
1022 silc_identifier_check(newconfig->server_info->server_name,
1023 strlen(newconfig->server_info->server_name),
1024 SILC_STRING_LOCALE, 256, NULL);
1025 if (!server->server_name) {
1026 SILC_LOG_ERROR(("Malformed server name string '%s'",
1027 server->config->server_info->server_name));
1031 /* Update the idcache list with a fresh pointer */
1032 silc_free(server->id_entry->server_name);
1033 server->id_entry->server_name = strdup(server->server_name);
1034 silc_idcache_update_by_context(server->local_list->servers,
1035 server->id_entry, NULL,
1036 strdup(server->id_entry->server_name),
1041 silc_server_config_setlogfiles(server);
1043 /* Change new key pair if necessary */
1044 if (newconfig->server_info->public_key &&
1045 !silc_pkcs_public_key_compare(server->public_key,
1046 newconfig->server_info->public_key)) {
1047 silc_pkcs_public_key_free(server->public_key);
1048 silc_pkcs_private_key_free(server->private_key);
1049 server->public_key = newconfig->server_info->public_key;
1050 server->private_key = newconfig->server_info->private_key;
1051 newconfig->server_info->public_key = NULL;
1052 newconfig->server_info->private_key = NULL;
1055 /* Check for unconfigured server and router connections and close
1056 connections that were unconfigured. */
1058 if (server->config->routers) {
1059 SilcServerConfigRouter *ptr;
1060 SilcServerConfigRouter *newptr;
1063 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1066 /* Check whether new config has this one too */
1067 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1068 if (silc_string_compare(newptr->host, ptr->host) &&
1069 newptr->port == ptr->port &&
1070 newptr->initiator == ptr->initiator) {
1076 if (!found && ptr->host) {
1077 /* Remove this connection */
1078 SilcPacketStream sock;
1079 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1080 ptr->host, ptr->port);
1082 silc_schedule_task_add_timeout(server->schedule,
1083 silc_server_rehash_close_connection,
1089 if (server->config->servers) {
1090 SilcServerConfigServer *ptr;
1091 SilcServerConfigServer *newptr;
1094 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1097 /* Check whether new config has this one too */
1098 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1099 if (silc_string_compare(newptr->host, ptr->host)) {
1105 if (!found && ptr->host) {
1106 /* Remove this connection */
1107 SilcPacketStream sock;
1108 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1111 silc_schedule_task_add_timeout(server->schedule,
1112 silc_server_rehash_close_connection,
1118 if (server->config->clients) {
1119 SilcServerConfigClient *ptr;
1120 SilcServerConfigClient *newptr;
1123 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1126 /* Check whether new config has this one too */
1127 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1128 if (silc_string_compare(newptr->host, ptr->host)) {
1134 if (!found && ptr->host) {
1135 /* Remove this connection */
1136 SilcPacketStream sock;
1137 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1140 silc_schedule_task_add_timeout(server->schedule,
1141 silc_server_rehash_close_connection,
1147 /* Create connections after rehash */
1148 silc_server_create_connections(server);
1150 /* Check whether our router status has changed */
1151 if (newconfig->servers) {
1152 SilcServerConfigServer *ptr = newconfig->servers;
1154 server->server_type = SILC_ROUTER;
1156 if (ptr->backup_router) {
1157 server->server_type = SILC_BACKUP_ROUTER;
1158 server->backup_router = TRUE;
1159 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1166 /* Our old config is gone now. We'll unreference our reference made in
1167 silc_server_init and then destroy it since we are destroying it
1168 underneath the application (layer which called silc_server_init). */
1169 silc_server_config_unref(&server->config_ref);
1170 silc_server_config_destroy(server->config);
1172 /* Take new config context */
1173 server->config = newconfig;
1174 silc_server_config_ref(&server->config_ref, server->config, server->config);
1177 /* Set debugging on if configured */
1178 if (server->config->debug_string) {
1179 silc_log_debug(TRUE);
1180 silc_log_set_debug_string(server->config->debug_string);
1182 #endif /* SILC_DEBUG */
1184 SILC_LOG_DEBUG(("Server rehashed"));
1189 /* The heart of the server. This runs the scheduler thus runs the server.
1190 When this returns the server has been stopped and the program will
1193 void silc_server_run(SilcServer server)
1195 SILC_LOG_INFO(("SILC Server started"));
1197 /* Start the scheduler, the heart of the SILC server. When this returns
1198 the program will be terminated. */
1199 silc_schedule(server->schedule);
1202 /* Stops the SILC server. This function is used to shutdown the server.
1203 This is usually called after the scheduler has returned. After stopping
1204 the server one should call silc_server_free. */
1206 void silc_server_stop(SilcServer server)
1209 SilcPacketStream ps;
1210 SilcNetListener listener;
1212 SILC_LOG_INFO(("SILC Server shutting down"));
1214 server->server_shutdown = TRUE;
1216 /* Close all connections */
1217 if (server->packet_engine) {
1218 list = silc_packet_engine_get_streams(server->packet_engine);
1220 silc_dlist_start(list);
1221 while ((ps = silc_dlist_get(list))) {
1222 SilcIDListData idata = silc_packet_get_context(ps);
1224 if (!silc_packet_stream_is_valid(ps))
1228 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1230 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1231 "Server is shutting down");
1232 silc_server_free_sock_user_data(server, ps,
1233 "Server is shutting down");
1235 silc_packet_engine_free_streams_list(list);
1238 /* We are not connected to network anymore */
1239 server->standalone = TRUE;
1241 silc_dlist_start(server->listeners);
1242 while ((listener = silc_dlist_get(server->listeners)))
1243 silc_net_close_listener(listener);
1245 silc_server_http_uninit(server);
1247 /* Cancel any possible retry timeouts */
1248 silc_schedule_task_del_by_callback(server->schedule,
1249 silc_server_connect_router);
1250 silc_schedule_task_del_by_callback(server->schedule,
1251 silc_server_connect_to_router_retry);
1252 silc_schedule_task_del_by_callback(server->schedule,
1253 silc_server_connect_to_router);
1255 silc_schedule_stop(server->schedule);
1257 SILC_LOG_DEBUG(("Server stopped"));
1260 /* Purge expired client entries from the server */
1262 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1264 SilcServer server = context;
1265 SilcClientEntry client;
1267 SilcUInt64 curtime = silc_time();
1269 SILC_LOG_DEBUG(("Expire timeout"));
1271 silc_dlist_start(server->expired_clients);
1272 while ((client = silc_dlist_get(server->expired_clients))) {
1273 /* For unregistered clients the created timestamp is actually
1274 unregistered timestamp. Make sure client remains in history
1275 at least 500 seconds. */
1276 if (client->data.created && curtime - client->data.created < 500)
1279 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1280 server->local_list : server->global_list);
1282 silc_idlist_del_data(client);
1283 silc_idlist_del_client(id_list, client);
1284 silc_dlist_del(server->expired_clients, client);
1287 silc_schedule_task_add_timeout(server->schedule,
1288 silc_server_purge_expired_clients, server,
1293 /******************************* Connecting *********************************/
1295 /* Free connection context */
1297 void silc_server_connection_free(SilcServerConnection sconn)
1301 SILC_LOG_DEBUG(("Free connection %p", sconn));
1302 silc_dlist_del(sconn->server->conns, sconn);
1303 silc_server_config_unref(&sconn->conn);
1304 silc_free(sconn->remote_host);
1305 silc_free(sconn->backup_replace_ip);
1309 /* Creates connection to a remote router. */
1311 void silc_server_create_connection(SilcServer server,
1314 const char *remote_host, SilcUInt32 port,
1315 SilcServerConnectCallback callback,
1318 SilcServerConnection sconn;
1320 /* Allocate connection object for hold connection specific stuff. */
1321 sconn = silc_calloc(1, sizeof(*sconn));
1324 sconn->remote_host = strdup(remote_host);
1325 sconn->remote_port = port;
1326 sconn->no_reconnect = reconnect == FALSE;
1327 sconn->callback = callback;
1328 sconn->callback_context = context;
1329 sconn->no_conf = dynamic;
1330 sconn->server = server;
1332 SILC_LOG_DEBUG(("Created connection %p to %s:%d", sconn,
1333 remote_host, port));
1335 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1339 /* Connection authentication completion callback */
1342 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1345 SilcServerConnection sconn = context;
1346 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1347 SilcServer server = entry->server;
1348 SilcServerConfigServer *conn;
1349 SilcServerConfigConnParams *param;
1350 SilcIDListData idata;
1351 SilcServerEntry id_entry = NULL;
1352 unsigned char id[32];
1357 SILC_LOG_DEBUG(("Connection %p authentication completed, entry %p",
1362 if (success == FALSE) {
1363 /* Authentication failed */
1365 /* Try reconnecting if configuration wants it */
1366 if (!sconn->no_reconnect) {
1367 silc_schedule_task_add_timeout(server->schedule,
1368 silc_server_connect_to_router_retry,
1370 silc_dlist_del(server->conns, sconn);
1374 if (sconn->callback)
1375 (*sconn->callback)(server, NULL, sconn->callback_context);
1376 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1377 silc_server_disconnect_remote(server, sconn->sock,
1378 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1382 /* XXX For now remote is router always */
1383 entry->data.conn_type = SILC_CONN_ROUTER;
1385 SILC_LOG_INFO(("Connected to %s %s",
1386 SILC_CONNTYPE_STRING(entry->data.conn_type),
1387 sconn->remote_host));
1389 /* Create the actual entry for remote entity */
1390 switch (entry->data.conn_type) {
1391 case SILC_CONN_SERVER:
1392 SILC_LOG_DEBUG(("Remote is SILC server"));
1394 /* Add new server. The server must register itself to us before it
1395 becomes registered to SILC network. */
1396 id_entry = silc_idlist_add_server(server->local_list,
1397 strdup(sconn->remote_host),
1398 SILC_SERVER, NULL, NULL, sconn->sock);
1400 if (sconn->callback)
1401 (*sconn->callback)(server, NULL, sconn->callback_context);
1402 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1403 silc_server_disconnect_remote(server, sconn->sock,
1404 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1409 server->stat.my_servers++;
1410 if (server->server_type == SILC_ROUTER)
1411 server->stat.servers++;
1412 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1414 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1417 case SILC_CONN_ROUTER:
1418 SILC_LOG_DEBUG(("Remote is SILC router"));
1420 /* Register to network */
1421 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1422 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1423 SILC_STR_UI_SHORT(id_len),
1424 SILC_STR_DATA(id, id_len),
1425 SILC_STR_UI_SHORT(strlen(server->server_name)),
1426 SILC_STR_DATA(server->server_name,
1427 strlen(server->server_name)),
1429 if (sconn->callback)
1430 (*sconn->callback)(server, NULL, sconn->callback_context);
1431 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1432 silc_server_disconnect_remote(server, sconn->sock,
1433 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1438 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1440 /* Check that we do not have this ID already */
1441 id_entry = silc_idlist_find_server_by_id(server->local_list,
1442 &remote_id.u.server_id,
1445 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1447 id_entry = silc_idlist_find_server_by_id(server->global_list,
1448 &remote_id.u.server_id,
1451 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1455 SILC_LOG_DEBUG(("New server id(%s)",
1456 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1458 /* Add the connected router to global server list. Router is sent
1459 as NULL since it's local to us. */
1460 id_entry = silc_idlist_add_server(server->global_list,
1461 strdup(sconn->remote_host),
1463 silc_id_dup(&remote_id.u.server_id,
1467 /* Try reconnecting if configuration wants it */
1468 if (!sconn->no_reconnect) {
1469 silc_schedule_task_add_timeout(server->schedule,
1470 silc_server_connect_to_router_retry,
1472 silc_dlist_del(server->conns, sconn);
1476 if (sconn->callback)
1477 (*sconn->callback)(server, NULL, sconn->callback_context);
1478 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1479 silc_server_disconnect_remote(server, sconn->sock,
1480 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1485 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1486 idata = (SilcIDListData)id_entry;
1487 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1488 SILC_IDLIST_STATUS_LOCAL);
1489 idata->sconn = sconn;
1490 idata->sconn->callback = NULL;
1493 server->stat.my_routers++;
1494 if (server->server_type == SILC_ROUTER)
1495 server->stat.routers++;
1496 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1498 if (!sconn->backup) {
1499 /* Mark this router our primary router if we're still standalone */
1500 if (server->standalone) {
1501 SILC_LOG_DEBUG(("This connection is our primary router"));
1502 server->id_entry->router = id_entry;
1503 server->router = id_entry;
1504 server->router->server_type = SILC_ROUTER;
1505 server->standalone = FALSE;
1506 server->backup_primary = FALSE;
1508 /* Announce data if we are not backup router (unless not as primary
1509 currently). Backup router announces later at the end of
1510 resuming protocol. */
1511 if (server->backup_router && server->server_type == SILC_ROUTER) {
1512 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1514 /* If we are router then announce our possible servers. Backup
1515 router announces also global servers. */
1516 if (server->server_type == SILC_ROUTER)
1517 silc_server_announce_servers(server,
1518 server->backup_router ? TRUE : FALSE,
1519 0, SILC_PRIMARY_ROUTE(server));
1521 /* Announce our clients and channels to the router */
1522 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1523 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1526 /* If we are backup router then this primary router is whom we are
1528 if (server->server_type == SILC_BACKUP_ROUTER) {
1529 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1531 NULL, NULL, &ip, NULL);
1532 silc_server_backup_add(server, server->id_entry, ip,
1533 sconn->remote_port, TRUE);
1538 /* We already have primary router. Disconnect this connection */
1539 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1540 silc_idlist_del_server(server->global_list, id_entry);
1541 if (sconn->callback)
1542 (*sconn->callback)(server, NULL, sconn->callback_context);
1543 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1544 silc_server_disconnect_remote(server, sconn->sock,
1545 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1550 /* Add this server to be our backup router */
1551 id_entry->server_type = SILC_BACKUP_ROUTER;
1552 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1553 sconn->backup_replace_port, FALSE);
1559 if (sconn->callback)
1560 (*sconn->callback)(server, NULL, sconn->callback_context);
1561 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1562 silc_server_disconnect_remote(server, sconn->sock,
1563 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1567 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1569 conn = sconn->conn.ref_ptr;
1570 param = &server->config->param;
1571 if (conn && conn->param)
1572 param = conn->param;
1574 /* Register rekey timeout */
1575 sconn->rekey_timeout = param->key_exchange_rekey;
1576 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1577 sconn->sock, sconn->rekey_timeout, 0);
1579 /* Set the entry as packet stream context */
1580 silc_packet_set_context(sconn->sock, id_entry);
1582 /* Call the completion callback to indicate that we've connected to
1584 if (sconn && sconn->callback)
1585 (*sconn->callback)(server, id_entry, sconn->callback_context);
1587 if (sconn == server->router_conn)
1588 server->router_conn = NULL;
1593 /* SKE completion callback */
1595 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1596 SilcSKESecurityProperties prop,
1597 SilcSKEKeyMaterial keymat,
1598 SilcSKERekeyMaterial rekey,
1601 SilcPacketStream sock = context;
1602 SilcUnknownEntry entry = silc_packet_get_context(sock);
1603 SilcServerConnection sconn;
1605 SilcServerConfigRouter *conn;
1606 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1607 void *auth_data = NULL;
1608 SilcUInt32 auth_data_len = 0;
1609 SilcConnAuth connauth;
1610 SilcCipher send_key, receive_key;
1611 SilcHmac hmac_send, hmac_receive;
1613 server = entry->server;
1614 sconn = entry->data.sconn;
1615 conn = sconn->conn.ref_ptr;
1618 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1620 if (status != SILC_SKE_STATUS_OK) {
1622 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1623 silc_ske_map_status(status), entry->hostname, entry->ip));
1626 /* Try reconnecting if configuration wants it */
1627 if (!sconn->no_reconnect) {
1628 silc_schedule_task_add_timeout(server->schedule,
1629 silc_server_connect_to_router_retry,
1631 silc_dlist_del(server->conns, sconn);
1635 if (sconn->callback)
1636 (*sconn->callback)(server, NULL, sconn->callback_context);
1637 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1638 silc_server_disconnect_remote(server, sconn->sock,
1639 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1643 SILC_LOG_DEBUG(("Setting keys into use"));
1645 /* Set the keys into use. The data will be encrypted after this. */
1646 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1647 &hmac_send, &hmac_receive, NULL)) {
1650 /* Try reconnecting if configuration wants it */
1651 if (!sconn->no_reconnect) {
1652 silc_schedule_task_add_timeout(server->schedule,
1653 silc_server_connect_to_router_retry,
1655 silc_dlist_del(server->conns, sconn);
1659 /* Error setting keys */
1660 if (sconn->callback)
1661 (*sconn->callback)(server, NULL, sconn->callback_context);
1662 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1663 silc_server_disconnect_remote(server, sconn->sock,
1664 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1667 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1668 hmac_receive, FALSE);
1670 SILC_LOG_DEBUG(("Starting connection authentication"));
1672 connauth = silc_connauth_alloc(server->schedule, ske,
1673 server->config->conn_auth_timeout);
1677 /* Try reconnecting if configuration wants it */
1678 if (!sconn->no_reconnect) {
1679 silc_schedule_task_add_timeout(server->schedule,
1680 silc_server_connect_to_router_retry,
1682 silc_dlist_del(server->conns, sconn);
1686 /** Error allocating auth protocol */
1687 if (sconn->callback)
1688 (*sconn->callback)(server, NULL, sconn->callback_context);
1689 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1690 silc_server_disconnect_remote(server, sconn->sock,
1691 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1695 /* Get authentication method */
1697 if (conn->passphrase) {
1698 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1699 auth_meth = SILC_AUTH_PUBLIC_KEY;
1700 auth_data = server->private_key;
1702 auth_meth = SILC_AUTH_PASSWORD;
1703 auth_data = conn->passphrase;
1704 auth_data_len = conn->passphrase_len;
1707 auth_meth = SILC_AUTH_PUBLIC_KEY;
1708 auth_data = server->private_key;
1712 entry->data.rekey = rekey;
1714 /* Start connection authentication */
1716 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1717 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1718 auth_data, auth_data_len,
1719 silc_server_ke_auth_compl, sconn);
1722 /* Function that is called when the network connection to a router has
1723 been established. This will continue with the key exchange protocol
1724 with the remote router. */
1726 void silc_server_start_key_exchange(SilcServerConnection sconn)
1728 SilcServer server = sconn->server;
1729 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1730 SilcUnknownEntry entry;
1731 SilcSKEParamsStruct params;
1734 /* Cancel any possible retry timeouts */
1735 silc_schedule_task_del_by_context(server->schedule, sconn);
1737 /* Create packet stream */
1738 sconn->sock = silc_packet_stream_create(server->packet_engine,
1739 server->schedule, sconn->stream);
1741 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1742 silc_stream_destroy(sconn->stream);
1744 /* Try reconnecting if configuration wants it */
1745 if (!sconn->no_reconnect) {
1746 silc_schedule_task_add_timeout(server->schedule,
1747 silc_server_connect_to_router_retry,
1749 silc_dlist_del(server->conns, sconn);
1753 if (sconn->callback)
1754 (*sconn->callback)(server, NULL, sconn->callback_context);
1755 silc_server_connection_free(sconn);
1758 server->stat.conn_num++;
1760 /* Set source ID to packet stream */
1761 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1763 silc_packet_stream_destroy(sconn->sock);
1765 /* Try reconnecting if configuration wants it */
1766 if (!sconn->no_reconnect) {
1767 silc_schedule_task_add_timeout(server->schedule,
1768 silc_server_connect_to_router_retry,
1770 silc_dlist_del(server->conns, sconn);
1774 if (sconn->callback)
1775 (*sconn->callback)(server, NULL, sconn->callback_context);
1776 silc_server_connection_free(sconn);
1780 /* Create entry for remote entity */
1781 entry = silc_calloc(1, sizeof(*entry));
1783 silc_packet_stream_destroy(sconn->sock);
1785 /* Try reconnecting if configuration wants it */
1786 if (!sconn->no_reconnect) {
1787 silc_schedule_task_add_timeout(server->schedule,
1788 silc_server_connect_to_router_retry,
1790 silc_dlist_del(server->conns, sconn);
1794 if (sconn->callback)
1795 (*sconn->callback)(server, NULL, sconn->callback_context);
1796 silc_server_connection_free(sconn);
1799 entry->server = server;
1800 entry->data.sconn = sconn;
1801 entry->data.conn_type = SILC_CONN_UNKNOWN;
1802 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1803 silc_packet_set_context(sconn->sock, entry);
1805 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1807 /* Set Key Exchange flags from configuration, but fall back to global
1809 memset(¶ms, 0, sizeof(params));
1810 SILC_GET_SKE_FLAGS(conn, params.flags);
1811 if (server->config->param.key_exchange_pfs)
1812 params.flags |= SILC_SKE_SP_FLAG_PFS;
1814 /* Start SILC Key Exchange protocol */
1815 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1816 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1817 server->public_key, server->private_key, sconn);
1820 silc_packet_stream_destroy(sconn->sock);
1822 /* Try reconnecting if configuration wants it */
1823 if (!sconn->no_reconnect) {
1824 silc_schedule_task_add_timeout(server->schedule,
1825 silc_server_connect_to_router_retry,
1827 silc_dlist_del(server->conns, sconn);
1831 if (sconn->callback)
1832 (*sconn->callback)(server, NULL, sconn->callback_context);
1833 silc_server_connection_free(sconn);
1836 silc_ske_set_callbacks(ske, silc_server_verify_key,
1837 silc_server_ke_completed, sconn->sock);
1839 /* Start key exchange protocol */
1840 params.version = silc_version_string;
1841 params.timeout_secs = server->config->key_exchange_timeout;
1842 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1845 /* Timeout callback that will be called to retry connecting to remote
1846 router. This is used by both normal and router server. This will wait
1847 before retrying the connecting. The timeout is generated by exponential
1848 backoff algorithm. */
1850 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1852 SilcServerConnection sconn = context;
1853 SilcServer server = sconn->server;
1854 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1855 SilcServerConfigConnParams *param =
1856 (conn->param ? conn->param : &server->config->param);
1858 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1859 sconn->remote_port));
1861 /* Calculate next timeout */
1862 if (sconn->retry_count >= 1) {
1863 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1864 if (sconn->retry_timeout > param->reconnect_interval_max)
1865 sconn->retry_timeout = param->reconnect_interval_max;
1867 sconn->retry_timeout = param->reconnect_interval;
1869 sconn->retry_count++;
1870 sconn->retry_timeout = sconn->retry_timeout +
1871 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1873 /* If we've reached max retry count, give up. */
1874 if ((sconn->retry_count > param->reconnect_count) &&
1875 sconn->no_reconnect) {
1876 SILC_LOG_ERROR(("Could not connect, giving up"));
1878 if (sconn->callback)
1879 (*sconn->callback)(server, NULL, sconn->callback_context);
1880 silc_server_connection_free(sconn);
1884 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1886 /* We will lookup a fresh pointer later */
1887 silc_server_config_unref(&sconn->conn);
1889 /* Wait before retrying */
1890 silc_schedule_task_del_by_context(server->schedule, sconn);
1891 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1892 sconn, sconn->retry_timeout, 0);
1895 /* Callback for async connection to remote router */
1897 static void silc_server_connection_established(SilcNetStatus status,
1901 SilcServerConnection sconn = context;
1902 SilcServer server = sconn->server;
1904 silc_schedule_task_del_by_context(server->schedule, sconn);
1909 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1910 sconn->remote_host, sconn->remote_port));
1912 /* Continue with key exchange protocol */
1913 sconn->stream = stream;
1914 silc_server_start_key_exchange(sconn);
1917 case SILC_NET_UNKNOWN_IP:
1918 case SILC_NET_UNKNOWN_HOST:
1919 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1920 sconn->remote_host, sconn->remote_port,
1921 silc_net_get_error_string(status)));
1922 if (!sconn->no_reconnect) {
1923 silc_schedule_task_add_timeout(sconn->server->schedule,
1924 silc_server_connect_to_router_retry,
1926 silc_dlist_del(server->conns, sconn);
1928 if (sconn->callback)
1929 (*sconn->callback)(server, NULL, sconn->callback_context);
1930 silc_server_connection_free(sconn);
1935 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1936 sconn->remote_host, sconn->remote_port,
1937 silc_net_get_error_string(status)));
1938 if (!sconn->no_reconnect) {
1939 silc_schedule_task_add_timeout(sconn->server->schedule,
1940 silc_server_connect_to_router_retry,
1942 silc_dlist_del(server->conns, sconn);
1944 if (sconn->callback)
1945 (*sconn->callback)(server, NULL, sconn->callback_context);
1946 silc_server_connection_free(sconn);
1952 /* Generic routine to use connect to a router. */
1954 SILC_TASK_CALLBACK(silc_server_connect_router)
1956 SilcServerConnection sconn = context;
1957 SilcServer server = sconn->server;
1958 SilcServerConfigRouter *rconn;
1960 silc_schedule_task_del_by_context(server->schedule, sconn);
1962 /* Don't connect if we are shutting down. */
1963 if (server->server_shutdown) {
1964 if (sconn->callback)
1965 (*sconn->callback)(server, NULL, sconn->callback_context);
1966 silc_server_connection_free(sconn);
1970 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1971 (sconn->backup ? "backup router" : "router"),
1972 sconn->remote_host, sconn->remote_port));
1974 if (!sconn->no_conf) {
1975 /* Find connection configuration */
1976 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1977 sconn->remote_port);
1979 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1980 (sconn->backup ? "backup router" : "router"),
1981 sconn->remote_host, sconn->remote_port));
1982 if (sconn->callback)
1983 (*sconn->callback)(server, NULL, sconn->callback_context);
1984 silc_server_connection_free(sconn);
1987 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1990 /* Connect to remote host */
1992 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1993 server->config->server_info->primary->server_ip),
1994 sconn->remote_host, sconn->remote_port,
1995 server->schedule, silc_server_connection_established,
1998 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1999 sconn->remote_host, sconn->remote_port));
2000 if (sconn->callback)
2001 (*sconn->callback)(server, NULL, sconn->callback_context);
2002 silc_server_connection_free(sconn);
2006 /* Add to connection list */
2007 silc_dlist_add(server->conns, sconn);
2010 /* This function connects to our primary router or if we are a router this
2011 establishes all our primary routes. This is called at the start of the
2012 server to do authentication and key exchange with our router - called
2015 SILC_TASK_CALLBACK(silc_server_connect_to_router)
2017 SilcServer server = context;
2018 SilcServerConnection sconn;
2019 SilcServerConfigRouter *ptr;
2020 SilcServerConfigConnParams *param;
2022 /* Don't connect if we are shutting down. */
2023 if (server->server_shutdown)
2026 SILC_LOG_DEBUG(("We are %s",
2027 (server->server_type == SILC_SERVER ?
2028 "normal server" : server->server_type == SILC_ROUTER ?
2029 "router" : "backup router/normal server")));
2031 if (!server->config->routers) {
2032 /* There wasn't a configured router, we will continue but we don't
2033 have a connection to outside world. We will be standalone server. */
2034 SILC_LOG_DEBUG(("No router(s), we are standalone"));
2035 server->standalone = TRUE;
2039 /* Cancel any possible retry timeouts */
2040 silc_schedule_task_del_by_callback(server->schedule,
2041 silc_server_connect_router);
2042 silc_schedule_task_del_by_callback(server->schedule,
2043 silc_server_connect_to_router_retry);
2045 /* Create the connections to all our routes */
2046 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
2048 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
2049 ptr->backup_router ? "Backup router" : "Router",
2050 ptr->initiator ? "Initiator" : "Responder",
2051 ptr->host, ptr->port));
2053 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
2054 ptr->initiator == FALSE && !server->backup_router &&
2055 !silc_server_config_get_backup_router(server))
2056 server->wait_backup = TRUE;
2058 if (!ptr->initiator)
2060 if (ptr->dynamic_connection)
2063 /* Check whether we are connecting or connected to this host already */
2064 if (silc_server_num_sockets_by_remote(server,
2065 silc_net_is_ip(ptr->host) ?
2067 silc_net_is_ip(ptr->host) ?
2068 NULL : ptr->host, ptr->port,
2069 SILC_CONN_ROUTER)) {
2070 SILC_LOG_DEBUG(("We are already connected to %s:%d",
2071 ptr->host, ptr->port));
2073 /* If we don't have primary router and this connection is our
2074 primary router we are in desync. Reconnect to the primary. */
2075 if (server->standalone && !server->router) {
2077 SilcPacketStream sock;
2078 SilcServerConfigRouter *primary =
2079 silc_server_config_get_primary_router(server);
2082 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
2083 ptr->host, ptr->port);
2086 server->backup_noswitch = TRUE;
2087 silc_server_free_sock_user_data(server, sock, NULL);
2088 silc_server_disconnect_remote(server, sock, 0, NULL);
2089 server->backup_noswitch = FALSE;
2090 SILC_LOG_DEBUG(("Reconnecting to primary router"));
2096 param = (ptr->param ? ptr->param : &server->config->param);
2098 /* Allocate connection object for hold connection specific stuff. */
2099 sconn = silc_calloc(1, sizeof(*sconn));
2102 sconn->server = server;
2103 sconn->remote_host = strdup(ptr->host);
2104 sconn->remote_port = ptr->port;
2105 sconn->backup = ptr->backup_router;
2106 if (sconn->backup) {
2107 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2108 sconn->backup_replace_port = ptr->backup_replace_port;
2110 sconn->no_reconnect = param->reconnect_keep_trying == FALSE;
2112 SILC_LOG_DEBUG(("Created connection %p", sconn));
2114 if (!server->router_conn && !sconn->backup)
2115 server->router_conn = sconn;
2118 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2124 /************************ Accepting new connection **************************/
2126 /* After this is called, server don't wait for backup router anymore.
2127 This gets called automatically even after we have backup router
2128 connection established. */
2130 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2132 SilcServer server = context;
2133 server->wait_backup = FALSE;
2136 /* Authentication data callback */
2139 silc_server_accept_get_auth(SilcConnAuth connauth,
2140 SilcConnectionType conn_type,
2141 unsigned char **passphrase,
2142 SilcUInt32 *passphrase_len,
2143 SilcSKR *repository,
2146 SilcPacketStream sock = context;
2147 SilcUnknownEntry entry = silc_packet_get_context(sock);
2148 SilcServer server = entry->server;
2150 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2152 /* Remote end is client */
2153 if (conn_type == SILC_CONN_CLIENT) {
2154 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2158 *passphrase = cconfig->passphrase;
2159 *passphrase_len = cconfig->passphrase_len;
2160 if (cconfig->publickeys)
2161 *repository = server->repository;
2163 if (cconfig->publickeys) {
2164 if (server->config->prefer_passphrase_auth) {
2168 *passphrase_len = 0;
2172 entry->conn_type = conn_type;
2176 /* Remote end is server */
2177 if (conn_type == SILC_CONN_SERVER) {
2178 SilcServerConfigServer *sconfig;
2180 /* If we are normal server, don't accept the connection */
2181 if (server->server_type == SILC_SERVER)
2184 sconfig = entry->sconfig.ref_ptr;
2188 *passphrase = sconfig->passphrase;
2189 *passphrase_len = sconfig->passphrase_len;
2190 if (sconfig->publickeys)
2191 *repository = server->repository;
2193 if (sconfig->publickeys) {
2194 if (server->config->prefer_passphrase_auth) {
2198 *passphrase_len = 0;
2202 entry->conn_type = conn_type;
2206 /* Remote end is router */
2207 if (conn_type == SILC_CONN_ROUTER) {
2208 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2212 *passphrase = rconfig->passphrase;
2213 *passphrase_len = rconfig->passphrase_len;
2214 if (rconfig->publickeys)
2215 *repository = server->repository;
2217 if (rconfig->publickeys) {
2218 if (server->config->prefer_passphrase_auth) {
2222 *passphrase_len = 0;
2226 entry->conn_type = conn_type;
2233 /* Authentication completion callback. */
2236 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2239 SilcPacketStream sock = context;
2240 SilcUnknownEntry entry = silc_packet_get_context(sock);
2241 SilcIDListData idata = (SilcIDListData)entry;
2242 SilcServer server = entry->server;
2243 SilcServerConfigConnParams *param = &server->config->param;
2244 SilcServerConnection sconn;
2246 const char *hostname, *ip;
2250 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2251 NULL, &hostname, &ip, &port);
2253 if (success == FALSE) {
2254 /* Authentication failed */
2255 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2256 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2257 server->stat.auth_failures++;
2258 silc_server_disconnect_remote(server, sock,
2259 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2260 silc_server_config_unref(&entry->cconfig);
2261 silc_server_config_unref(&entry->sconfig);
2262 silc_server_config_unref(&entry->rconfig);
2263 silc_server_free_sock_user_data(server, sock, NULL);
2267 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2269 switch (entry->conn_type) {
2270 case SILC_CONN_CLIENT:
2272 SilcClientEntry client;
2273 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2275 /* Verify whether this connection is after all allowed to connect */
2276 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2277 &server->config->param,
2279 silc_connauth_get_ske(connauth))) {
2280 server->stat.auth_failures++;
2284 /* If we are primary router and we have backup router configured
2285 but it has not connected to use yet, do not accept any other
2287 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2288 !server->backup_router) {
2289 SilcServerConfigRouter *router;
2290 router = silc_server_config_get_backup_router(server);
2291 if (router && strcmp(server->config->server_info->primary->server_ip,
2293 silc_server_find_socket_by_host(server,
2295 router->backup_replace_ip, 0)) {
2296 SILC_LOG_INFO(("Will not accept connections because we do "
2297 "not have backup router connection established"));
2298 silc_server_disconnect_remote(server, sock,
2299 SILC_STATUS_ERR_PERM_DENIED,
2300 "We do not have connection to backup "
2301 "router established, try later");
2302 silc_server_config_unref(&entry->cconfig);
2303 silc_server_config_unref(&entry->sconfig);
2304 silc_server_config_unref(&entry->rconfig);
2305 silc_server_free_sock_user_data(server, sock, NULL);
2306 server->stat.auth_failures++;
2308 /* From here on, wait 20 seconds for the backup router to appear. */
2309 silc_schedule_task_add_timeout(server->schedule,
2310 silc_server_backup_router_wait,
2311 (void *)server, 20, 0);
2316 SILC_LOG_DEBUG(("Remote host is client"));
2317 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2320 /* Add the client to the client ID cache. The nickname and Client ID
2321 and other information is created after we have received NEW_CLIENT
2322 packet from client. */
2323 client = silc_idlist_add_client(server->local_list,
2324 NULL, NULL, NULL, NULL, NULL, sock);
2326 SILC_LOG_ERROR(("Could not add new client to cache"));
2327 server->stat.auth_failures++;
2328 silc_server_disconnect_remote(server, sock,
2329 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2330 silc_server_config_unref(&entry->cconfig);
2331 silc_server_config_unref(&entry->sconfig);
2332 silc_server_config_unref(&entry->rconfig);
2333 silc_server_free_sock_user_data(server, sock, NULL);
2336 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2337 entry->data.conn_type = SILC_CONN_CLIENT;
2340 server->stat.my_clients++;
2341 server->stat.clients++;
2342 server->stat.cell_clients++;
2344 /* Get connection parameters */
2346 param = conn->param;
2348 if (!param->keepalive_secs)
2349 param->keepalive_secs = server->config->param.keepalive_secs;
2351 if (!param->qos && server->config->param.qos) {
2352 param->qos = server->config->param.qos;
2353 param->qos_rate_limit = server->config->param.qos_rate_limit;
2354 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2355 param->qos_limit_sec = server->config->param.qos_limit_sec;
2356 param->qos_limit_usec = server->config->param.qos_limit_usec;
2359 /* Check if to be anonymous connection */
2360 if (param->anonymous)
2361 client->mode |= SILC_UMODE_ANONYMOUS;
2364 /* Add public key to repository */
2365 SILC_LOG_DEBUG(("Add client public key to repository"));
2366 if (!silc_server_get_public_key_by_client(server, client, NULL))
2367 silc_skr_add_public_key_simple(server->repository,
2368 entry->data.public_key,
2369 SILC_SKR_USAGE_IDENTIFICATION, client,
2372 id_entry = (void *)client;
2376 case SILC_CONN_SERVER:
2377 case SILC_CONN_ROUTER:
2379 SilcServerEntry new_server;
2380 SilcBool initiator = FALSE;
2381 SilcBool backup_local = FALSE;
2382 SilcBool backup_router = FALSE;
2383 char *backup_replace_ip = NULL;
2384 SilcUInt16 backup_replace_port = 0;
2385 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2386 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2388 /* If we are backup router and this is incoming server connection
2389 and we do not have connection to primary router, do not allow
2391 if (server->server_type == SILC_BACKUP_ROUTER &&
2392 entry->conn_type == SILC_CONN_SERVER &&
2393 !SILC_PRIMARY_ROUTE(server)) {
2394 SILC_LOG_INFO(("Will not accept server connection because we do "
2395 "not have primary router connection established"));
2396 silc_server_disconnect_remote(server, sock,
2397 SILC_STATUS_ERR_PERM_DENIED,
2398 "We do not have connection to primary "
2399 "router established, try later");
2400 silc_server_config_unref(&entry->cconfig);
2401 silc_server_config_unref(&entry->sconfig);
2402 silc_server_config_unref(&entry->rconfig);
2403 silc_server_free_sock_user_data(server, sock, NULL);
2404 server->stat.auth_failures++;
2408 if (entry->conn_type == SILC_CONN_ROUTER) {
2409 /* Verify whether this connection is after all allowed to connect */
2410 if (!silc_server_connection_allowed(server, sock,
2412 &server->config->param,
2413 rconn ? rconn->param : NULL,
2414 silc_connauth_get_ske(connauth))) {
2415 silc_server_config_unref(&entry->cconfig);
2416 silc_server_config_unref(&entry->sconfig);
2417 silc_server_config_unref(&entry->rconfig);
2418 server->stat.auth_failures++;
2424 param = rconn->param;
2426 if (!param->keepalive_secs)
2427 param->keepalive_secs = server->config->param.keepalive_secs;
2429 if (!param->qos && server->config->param.qos) {
2430 param->qos = server->config->param.qos;
2431 param->qos_rate_limit = server->config->param.qos_rate_limit;
2432 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2433 param->qos_limit_sec = server->config->param.qos_limit_sec;
2434 param->qos_limit_usec = server->config->param.qos_limit_usec;
2438 initiator = rconn->initiator;
2439 backup_local = rconn->backup_local;
2440 backup_router = rconn->backup_router;
2441 backup_replace_ip = rconn->backup_replace_ip;
2442 backup_replace_port = rconn->backup_replace_port;
2446 if (entry->conn_type == SILC_CONN_SERVER) {
2447 /* Verify whether this connection is after all allowed to connect */
2448 if (!silc_server_connection_allowed(server, sock,
2450 &server->config->param,
2451 srvconn ? srvconn->param : NULL,
2452 silc_connauth_get_ske(connauth))) {
2453 server->stat.auth_failures++;
2457 if (srvconn->param) {
2458 param = srvconn->param;
2460 if (!param->keepalive_secs)
2461 param->keepalive_secs = server->config->param.keepalive_secs;
2463 if (!param->qos && server->config->param.qos) {
2464 param->qos = server->config->param.qos;
2465 param->qos_rate_limit = server->config->param.qos_rate_limit;
2466 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2467 param->qos_limit_sec = server->config->param.qos_limit_sec;
2468 param->qos_limit_usec = server->config->param.qos_limit_usec;
2472 backup_router = srvconn->backup_router;
2476 /* If we are primary router and we have backup router configured
2477 but it has not connected to use yet, do not accept any other
2479 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2480 !server->backup_router && !backup_router) {
2481 SilcServerConfigRouter *router;
2482 router = silc_server_config_get_backup_router(server);
2483 if (router && strcmp(server->config->server_info->primary->server_ip,
2485 silc_server_find_socket_by_host(server,
2487 router->backup_replace_ip, 0)) {
2488 SILC_LOG_INFO(("Will not accept connections because we do "
2489 "not have backup router connection established"));
2490 silc_server_disconnect_remote(server, sock,
2491 SILC_STATUS_ERR_PERM_DENIED,
2492 "We do not have connection to backup "
2493 "router established, try later");
2494 silc_server_config_unref(&entry->cconfig);
2495 silc_server_config_unref(&entry->sconfig);
2496 silc_server_config_unref(&entry->rconfig);
2497 silc_server_free_sock_user_data(server, sock, NULL);
2498 server->stat.auth_failures++;
2500 /* From here on, wait 20 seconds for the backup router to appear. */
2501 silc_schedule_task_add_timeout(server->schedule,
2502 silc_server_backup_router_wait,
2503 (void *)server, 20, 0);
2508 SILC_LOG_DEBUG(("Remote host is %s",
2509 entry->conn_type == SILC_CONN_SERVER ?
2510 "server" : (backup_router ?
2511 "backup router" : "router")));
2512 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2513 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2514 "server" : (backup_router ?
2515 "backup router" : "router")));
2517 /* Add the server into server cache. The server name and Server ID
2518 is updated after we have received NEW_SERVER packet from the
2519 server. We mark ourselves as router for this server if we really
2522 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2523 server->local_list : (backup_router ?
2524 server->local_list :
2525 server->global_list)),
2527 (entry->conn_type == SILC_CONN_SERVER ?
2528 SILC_SERVER : SILC_ROUTER),
2530 (entry->conn_type == SILC_CONN_SERVER ?
2531 server->id_entry : (backup_router ?
2532 server->id_entry : NULL)),
2535 SILC_LOG_ERROR(("Could not add new server to cache"));
2536 silc_server_disconnect_remote(server, sock,
2537 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2538 silc_server_config_unref(&entry->cconfig);
2539 silc_server_config_unref(&entry->sconfig);
2540 silc_server_config_unref(&entry->rconfig);
2541 silc_server_free_sock_user_data(server, sock, NULL);
2542 server->stat.auth_failures++;
2545 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2546 entry->data.conn_type = entry->conn_type;
2548 id_entry = (void *)new_server;
2550 /* If the incoming connection is router and marked as backup router
2551 then add it to be one of our backups */
2552 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2553 /* Change it back to SERVER type since that's what it really is. */
2555 entry->data.conn_type = SILC_CONN_SERVER;
2556 new_server->server_type = SILC_BACKUP_ROUTER;
2558 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2559 ("Backup router %s is now online",
2562 /* Remove the backup waiting with timeout */
2563 silc_schedule_task_add_timeout(server->schedule,
2564 silc_server_backup_router_wait,
2565 (void *)server, 10, 0);
2569 if (entry->data.conn_type == SILC_CONN_SERVER) {
2570 server->stat.my_servers++;
2571 server->stat.servers++;
2572 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2574 server->stat.my_routers++;
2575 server->stat.routers++;
2576 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2579 /* Check whether this connection is to be our primary router connection
2580 if we do not already have the primary route. */
2581 if (!backup_router &&
2582 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2583 if (silc_server_config_is_primary_route(server) && !initiator)
2586 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2587 server->standalone = FALSE;
2588 if (!server->id_entry->router) {
2589 server->id_entry->router = id_entry;
2590 server->router = id_entry;
2602 /* Add connection to server->conns so that we know we have connection
2604 sconn = silc_calloc(1, sizeof(*sconn));
2605 sconn->server = server;
2607 sconn->remote_host = strdup(hostname);
2608 sconn->remote_port = port;
2609 silc_dlist_add(server->conns, sconn);
2610 idata->sconn = sconn;
2611 idata->sconn->callback = NULL;
2612 idata->last_receive = time(NULL);
2614 /* Add the common data structure to the ID entry. */
2615 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2616 silc_packet_set_context(sock, id_entry);
2618 /* Connection has been fully established now. Everything is ok. */
2619 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2621 /* Perform Quality of Service */
2623 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2624 param->qos_rate_limit, param->qos_bytes_limit,
2625 param->qos_limit_sec, param->qos_limit_usec);
2627 silc_server_config_unref(&entry->cconfig);
2628 silc_server_config_unref(&entry->sconfig);
2629 silc_server_config_unref(&entry->rconfig);
2633 silc_ske_free(silc_connauth_get_ske(connauth));
2634 silc_connauth_free(connauth);
2637 /* SKE completion callback. We set the new keys into use here. */
2640 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2641 SilcSKESecurityProperties prop,
2642 SilcSKEKeyMaterial keymat,
2643 SilcSKERekeyMaterial rekey,
2646 SilcPacketStream sock = context;
2647 SilcUnknownEntry entry = silc_packet_get_context(sock);
2648 SilcIDListData idata = (SilcIDListData)entry;
2649 SilcServer server = entry->server;
2650 SilcConnAuth connauth;
2651 SilcCipher send_key, receive_key;
2652 SilcHmac hmac_send, hmac_receive;
2659 if (status != SILC_SKE_STATUS_OK) {
2661 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2662 silc_ske_map_status(status), entry->hostname, entry->ip));
2664 silc_server_disconnect_remote(server, sock,
2665 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2666 silc_server_config_unref(&entry->cconfig);
2667 silc_server_config_unref(&entry->sconfig);
2668 silc_server_config_unref(&entry->rconfig);
2669 silc_server_free_sock_user_data(server, sock, NULL);
2673 SILC_LOG_DEBUG(("Setting keys into use"));
2675 /* Set the keys into use. The data will be encrypted after this. */
2676 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2677 &hmac_send, &hmac_receive, &hash)) {
2678 /* Error setting keys */
2680 silc_server_disconnect_remote(server, sock,
2681 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2682 silc_server_free_sock_user_data(server, sock, NULL);
2685 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2686 hmac_receive, FALSE);
2688 idata->rekey = rekey;
2689 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2690 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2692 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2697 SILC_LOG_DEBUG(("Starting connection authentication"));
2698 server->stat.auth_attempts++;
2700 connauth = silc_connauth_alloc(server->schedule, ske,
2701 server->config->conn_auth_timeout);
2703 /** Error allocating auth protocol */
2705 silc_server_disconnect_remote(server, sock,
2706 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2707 silc_server_config_unref(&entry->cconfig);
2708 silc_server_config_unref(&entry->sconfig);
2709 silc_server_config_unref(&entry->rconfig);
2710 silc_server_free_sock_user_data(server, sock, NULL);
2714 /* Start connection authentication */
2716 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2717 silc_server_accept_auth_compl, sock);
2720 /* Accept new TCP connection */
2722 static void silc_server_accept_new_connection(SilcNetStatus status,
2726 SilcServer server = context;
2727 SilcPacketStream packet_stream;
2728 SilcServerConfigClient *cconfig = NULL;
2729 SilcServerConfigServer *sconfig = NULL;
2730 SilcServerConfigRouter *rconfig = NULL;
2731 SilcServerConfigDeny *deny;
2732 SilcUnknownEntry entry;
2734 SilcSKEParamsStruct params;
2735 char *hostname, *ip;
2738 SILC_LOG_DEBUG(("Accepting new connection"));
2740 /* Check for maximum allowed connections */
2741 server->stat.conn_attempts++;
2742 if (silc_dlist_count(server->conns) >
2743 server->config->param.connections_max) {
2744 SILC_LOG_ERROR(("Refusing connection, server is full"));
2745 server->stat.conn_failures++;
2746 silc_stream_destroy(stream);
2750 /* Get hostname, IP and port */
2751 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2752 (const char **)&ip, &port)) {
2753 /* Bad socket stream */
2754 server->stat.conn_failures++;
2755 silc_stream_destroy(stream);
2759 /* Create packet stream */
2760 packet_stream = silc_packet_stream_create(server->packet_engine,
2761 server->schedule, stream);
2762 if (!packet_stream) {
2763 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2764 server->stat.conn_failures++;
2765 silc_stream_destroy(stream);
2768 server->stat.conn_num++;
2770 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2772 /* Set source ID to packet stream */
2773 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2776 server->stat.conn_failures++;
2777 silc_packet_stream_destroy(packet_stream);
2781 /* Check whether this connection is denied to connect to us. */
2782 deny = silc_server_config_find_denied(server, ip);
2784 deny = silc_server_config_find_denied(server, hostname);
2786 /* The connection is denied */
2787 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2788 silc_server_disconnect_remote(server, packet_stream,
2789 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2791 silc_server_free_sock_user_data(server, packet_stream, NULL);
2795 /* Check whether we have configured this sort of connection at all. We
2796 have to check all configurations since we don't know what type of
2797 connection this is. */
2798 if (!(cconfig = silc_server_config_find_client(server, ip)))
2799 cconfig = silc_server_config_find_client(server, hostname);
2800 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2801 sconfig = silc_server_config_find_server_conn(server, hostname);
2802 if (server->server_type == SILC_ROUTER)
2803 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2804 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2805 if (!cconfig && !sconfig && !rconfig) {
2806 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2807 server->stat.conn_failures++;
2808 silc_server_disconnect_remote(server, packet_stream,
2809 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2810 silc_server_free_sock_user_data(server, packet_stream, NULL);
2814 /* The connection is allowed */
2815 entry = silc_calloc(1, sizeof(*entry));
2817 server->stat.conn_failures++;
2818 silc_server_disconnect_remote(server, packet_stream,
2819 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2820 silc_server_free_sock_user_data(server, packet_stream, NULL);
2823 entry->hostname = hostname;
2826 entry->server = server;
2827 entry->data.conn_type = SILC_CONN_UNKNOWN;
2828 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2829 silc_packet_set_context(packet_stream, entry);
2831 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2833 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2834 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2835 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2837 /* Take flags for key exchange. Since we do not know what type of connection
2838 this is, we go through all found configurations and use the global ones
2839 as well. This will result always into strictest key exchange flags. */
2840 memset(¶ms, 0, sizeof(params));
2841 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2842 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2843 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2844 if (server->config->param.key_exchange_pfs)
2845 params.flags |= SILC_SKE_SP_FLAG_PFS;
2847 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2848 server->stat.conn_attempts++;
2850 /* Start SILC Key Exchange protocol */
2851 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2852 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2853 server->public_key, server->private_key,
2856 server->stat.conn_failures++;
2857 silc_server_disconnect_remote(server, packet_stream,
2858 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2859 silc_server_free_sock_user_data(server, packet_stream, NULL);
2862 silc_ske_set_callbacks(ske, silc_server_verify_key,
2863 silc_server_accept_completed, packet_stream);
2865 /* Start key exchange protocol */
2866 params.version = silc_version_string;
2867 params.timeout_secs = server->config->key_exchange_timeout;
2868 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2872 /********************************** Rekey ***********************************/
2874 /* Initiator rekey completion callback */
2876 static void silc_server_rekey_completion(SilcSKE ske,
2877 SilcSKEStatus status,
2878 const SilcSKESecurityProperties prop,
2879 const SilcSKEKeyMaterial keymat,
2880 SilcSKERekeyMaterial rekey,
2883 SilcPacketStream sock = context;
2884 SilcIDListData idata = silc_packet_get_context(sock);
2885 SilcServer server = idata->sconn->server;
2887 idata->sconn->op = NULL;
2888 if (status != SILC_SKE_STATUS_OK) {
2889 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2890 idata->sconn->remote_host));
2894 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2895 idata->sconn->remote_host, idata->sconn->remote_port,
2896 SILC_CONNTYPE_STRING(idata->conn_type)));
2898 /* Save rekey data for next rekey */
2899 idata->rekey = rekey;
2901 /* Register new rekey timeout */
2902 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2903 sock, idata->sconn->rekey_timeout, 0);
2906 /* Rekey callback. Start rekey as initiator */
2908 SILC_TASK_CALLBACK(silc_server_do_rekey)
2910 SilcServer server = app_context;
2911 SilcPacketStream sock = context;
2912 SilcIDListData idata = silc_packet_get_context(sock);
2915 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2917 /* Do not execute rekey with disabled connections */
2918 if (idata->status & SILC_IDLIST_STATUS_DISABLED || !idata->rekey)
2921 /* If another protocol is active do not start rekey */
2922 if (idata->sconn->op) {
2923 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2924 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2929 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2930 idata->sconn->remote_host, idata->sconn->remote_port,
2931 SILC_CONNTYPE_STRING(idata->conn_type)));
2934 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2935 server->public_key, NULL, sock);
2939 /* Set SKE callbacks */
2940 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2943 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2946 /* Responder rekey completion callback */
2949 silc_server_rekey_resp_completion(SilcSKE ske,
2950 SilcSKEStatus status,
2951 const SilcSKESecurityProperties prop,
2952 const SilcSKEKeyMaterial keymat,
2953 SilcSKERekeyMaterial rekey,
2956 SilcPacketStream sock = context;
2957 SilcIDListData idata = silc_packet_get_context(sock);
2959 idata->sconn->op = NULL;
2960 if (status != SILC_SKE_STATUS_OK) {
2961 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2962 idata->sconn->remote_host));
2966 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2967 idata->sconn->remote_host, idata->sconn->remote_port,
2968 SILC_CONNTYPE_STRING(idata->conn_type)));
2970 /* Save rekey data for next rekey */
2971 idata->rekey = rekey;
2974 /* Start rekey as responder */
2976 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2979 SilcIDListData idata = silc_packet_get_context(sock);
2982 if (!idata->rekey) {
2983 silc_packet_free(packet);
2987 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2988 idata->sconn->remote_host, idata->sconn->remote_port,
2989 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2992 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2993 server->public_key, NULL, sock);
2995 silc_packet_free(packet);
2999 /* Set SKE callbacks */
3000 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
3003 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
3008 /****************************** Disconnection *******************************/
3010 /* Destroys packet stream. */
3012 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3014 silc_packet_stream_unref(context);
3017 /* Closes connection to socket connection */
3019 void silc_server_close_connection(SilcServer server,
3020 SilcPacketStream sock)
3022 SilcIDListData idata = silc_packet_get_context(sock);
3024 const char *hostname;
3027 if (!silc_packet_stream_is_valid(sock))
3030 memset(tmp, 0, sizeof(tmp));
3031 // silc_socket_get_error(sock, tmp, sizeof(tmp));
3032 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3033 NULL, &hostname, NULL, &port);
3034 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
3035 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
3036 tmp[0] ? tmp : ""));
3038 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
3040 if (idata && idata->sconn) {
3041 silc_server_connection_free(idata->sconn);
3042 idata->sconn = NULL;
3045 /* Take a reference and then destroy the stream. The last reference
3046 is released later in a timeout callback. */
3047 silc_packet_stream_ref(sock);
3048 silc_packet_stream_destroy(sock);
3050 /* Close connection with timeout */
3051 server->stat.conn_num--;
3052 silc_schedule_task_del_by_all(server->schedule, 0,
3053 silc_server_close_connection_final, sock);
3054 silc_schedule_task_add_timeout(server->schedule,
3055 silc_server_close_connection_final,
3059 /* Sends disconnect message to remote connection and disconnects the
3062 void silc_server_disconnect_remote(SilcServer server,
3063 SilcPacketStream sock,
3064 SilcStatus status, ...)
3066 unsigned char buf[512];
3073 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
3075 va_start(ap, status);
3076 cp = va_arg(ap, char *);
3078 silc_vsnprintf(buf, sizeof(buf), cp, ap);
3081 /* Send SILC_PACKET_DISCONNECT */
3082 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
3083 SILC_STR_UI_CHAR(status),
3084 SILC_STR_UI8_STRING(cp ? buf : NULL),
3087 /* Close connection */
3088 silc_server_close_connection(server, sock);
3091 /* Frees client data and notifies about client's signoff. */
3093 void silc_server_free_client_data(SilcServer server,
3094 SilcPacketStream sock,
3095 SilcClientEntry client,
3097 const char *signoff)
3099 SILC_LOG_DEBUG(("Freeing client %p data", client));
3102 /* Check if anyone is watching this nickname */
3103 if (server->server_type == SILC_ROUTER)
3104 silc_server_check_watcher_list(server, client, NULL,
3105 SILC_NOTIFY_TYPE_SIGNOFF);
3107 /* Send SIGNOFF notify to routers. */
3109 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3110 SILC_BROADCAST(server), client->id,
3114 /* Remove client from all channels */
3116 silc_server_remove_from_channels(server, NULL, client,
3117 TRUE, (char *)signoff, TRUE, FALSE);
3119 silc_server_remove_from_channels(server, NULL, client,
3120 FALSE, NULL, FALSE, FALSE);
3122 /* Remove this client from watcher list if it is */
3123 silc_server_del_from_watcher_list(server, client);
3125 /* Remove client's public key from repository, this will free it too. */
3126 if (client->data.public_key) {
3127 silc_skr_del_public_key(server->repository, client->data.public_key,
3129 client->data.public_key = NULL;
3132 /* Update statistics */
3133 server->stat.my_clients--;
3134 SILC_VERIFY(server->stat.clients > 0);
3135 server->stat.clients--;
3136 if (server->stat.cell_clients)
3137 server->stat.cell_clients--;
3138 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3139 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3140 silc_schedule_task_del_by_context(server->schedule, client);
3142 if (client->data.sconn) {
3143 silc_server_connection_free(client->data.sconn);
3144 client->data.sconn = NULL;
3147 /* We will not delete the client entry right away. We will take it
3148 into history (for WHOWAS command) for 5 minutes, unless we're
3149 shutting down server. */
3150 if (!server->server_shutdown) {
3151 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3153 client->router = NULL;
3154 client->connection = NULL;
3155 client->data.created = silc_time();
3156 silc_dlist_del(server->expired_clients, client);
3157 silc_dlist_add(server->expired_clients, client);
3159 /* Delete directly since we're shutting down server */
3160 SILC_LOG_DEBUG(("Delete client directly"));
3161 silc_idlist_del_data(client);
3162 silc_idlist_del_client(server->local_list, client);
3166 /* Frees user_data pointer from socket connection object. This also sends
3167 appropriate notify packets to the network to inform about leaving
3170 void silc_server_free_sock_user_data(SilcServer server,
3171 SilcPacketStream sock,
3172 const char *signoff_message)
3174 SilcIDListData idata;
3181 SILC_LOG_DEBUG(("Start, sock %p", sock));
3183 idata = silc_packet_get_context(sock);
3187 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3190 /* Cancel active protocols */
3192 if (idata->sconn && idata->sconn->op) {
3193 SILC_LOG_DEBUG(("Abort active protocol"));
3194 silc_async_abort(idata->sconn->op, NULL, NULL);
3196 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3197 ((SilcUnknownEntry)idata)->op) {
3198 SILC_LOG_DEBUG(("Abort active protocol"));
3199 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3203 switch (idata->conn_type) {
3204 case SILC_CONN_CLIENT:
3206 SilcClientEntry client_entry = (SilcClientEntry)idata;
3207 silc_server_free_client_data(server, sock, client_entry, TRUE,
3209 silc_packet_set_context(sock, NULL);
3213 case SILC_CONN_SERVER:
3214 case SILC_CONN_ROUTER:
3216 SilcServerEntry user_data = (SilcServerEntry)idata;
3217 SilcServerEntry backup_router = NULL;
3219 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3222 backup_router = silc_server_backup_get(server, user_data->id);
3224 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3225 backup_router == server->id_entry &&
3226 idata->conn_type != SILC_CONN_ROUTER)
3227 backup_router = NULL;
3229 if (server->server_shutdown || server->backup_noswitch)
3230 backup_router = NULL;
3232 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3233 NULL, NULL, &ip, &port);
3235 /* If this was our primary router connection then we're lost to
3236 the outside world. */
3237 if (server->router == user_data) {
3238 /* Check whether we have a backup router connection */
3239 if (!backup_router || backup_router == user_data) {
3240 if (!server->no_reconnect)
3241 silc_server_create_connections(server);
3242 server->id_entry->router = NULL;
3243 server->router = NULL;
3244 server->standalone = TRUE;
3245 server->backup_primary = FALSE;
3246 backup_router = NULL;
3248 if (server->id_entry != backup_router) {
3249 SILC_LOG_INFO(("New primary router is backup router %s",
3250 backup_router->server_name));
3251 server->id_entry->router = backup_router;
3252 server->router = backup_router;
3253 server->router_connect = time(0);
3254 server->backup_primary = TRUE;
3255 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3257 /* Send START_USE to backup router to indicate we have switched */
3258 silc_server_backup_send_start_use(server,
3259 backup_router->connection,
3262 SILC_LOG_INFO(("We are now new primary router in this cell"));
3263 server->id_entry->router = NULL;
3264 server->router = NULL;
3265 server->standalone = TRUE;
3268 /* We stop here to take a breath */
3271 if (server->backup_router) {
3272 server->server_type = SILC_ROUTER;
3274 /* We'll need to constantly try to reconnect to the primary
3275 router so that we'll see when it comes back online. */
3276 silc_server_create_connection(server, TRUE, FALSE, ip, port,
3277 silc_server_backup_connected,
3281 /* Mark this connection as replaced */
3282 silc_server_backup_replaced_add(server, user_data->id,
3285 } else if (backup_router) {
3286 SILC_LOG_INFO(("Enabling the use of backup router %s",
3287 backup_router->server_name));
3289 /* Mark this connection as replaced */
3290 silc_server_backup_replaced_add(server, user_data->id,
3292 } else if (server->server_type == SILC_SERVER &&
3293 idata->conn_type == SILC_CONN_ROUTER) {
3294 /* Reconnect to the router (backup) */
3295 if (!server->no_reconnect)
3296 silc_server_create_connections(server);
3299 if (user_data->server_name)
3300 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3301 ("Server %s signoff", user_data->server_name));
3303 if (!backup_router) {
3304 /* Remove all servers that are originated from this server, and
3305 remove the clients of those servers too. */
3306 silc_server_remove_servers_by_server(server, user_data, TRUE);
3309 /* Remove the clients that this server owns as they will become
3310 invalid now too. For backup router the server is actually
3311 coming from the primary router, so mark that as the owner
3313 if (server->server_type == SILC_BACKUP_ROUTER &&
3314 sock->type == SILC_CONN_SERVER)
3315 silc_server_remove_clients_by_server(server, server->router,
3319 silc_server_remove_clients_by_server(server, user_data,
3322 /* Remove channels owned by this server */
3323 if (server->server_type == SILC_SERVER)
3324 silc_server_remove_channels_by_server(server, user_data);
3326 /* Enable local server connections that may be disabled */
3327 silc_server_local_servers_toggle_enabled(server, TRUE);
3329 /* Update the client entries of this server to the new backup
3330 router. If we are the backup router we also resolve the real
3331 servers for the clients. After updating is over this also
3332 removes the clients that this server explicitly owns. */
3333 silc_server_update_clients_by_server(server, user_data,
3334 backup_router, TRUE);
3336 /* If we are router and just lost our primary router (now standlaone)
3337 we remove everything that was behind it, since we don't know
3339 if (server->server_type == SILC_ROUTER && server->standalone)
3340 /* Remove all servers that are originated from this server, and
3341 remove the clients of those servers too. */
3342 silc_server_remove_servers_by_server(server, user_data, TRUE);
3344 /* Finally remove the clients that are explicitly owned by this
3345 server. They go down with the server. */
3346 silc_server_remove_clients_by_server(server, user_data,
3349 /* Update our server cache to use the new backup router too. */
3350 silc_server_update_servers_by_server(server, user_data, backup_router);
3351 if (server->server_type == SILC_SERVER)
3352 silc_server_update_channels_by_server(server, user_data,
3355 /* Send notify about primary router going down to local operators */
3356 if (server->backup_router)
3357 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3358 SILC_NOTIFY_TYPE_NONE,
3359 ("%s switched to backup router %s "
3360 "(we are primary router now)",
3361 server->server_name, server->server_name));
3362 else if (server->router)
3363 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3364 SILC_NOTIFY_TYPE_NONE,
3365 ("%s switched to backup router %s",
3366 server->server_name,
3367 server->router->server_name));
3369 server->backup_noswitch = FALSE;
3372 silc_server_connection_free(idata->sconn);
3373 idata->sconn = NULL;
3377 if (idata->conn_type == SILC_CONN_SERVER) {
3378 server->stat.my_servers--;
3379 server->stat.servers--;
3380 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3381 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3382 server->stat.my_routers--;
3383 server->stat.routers--;
3384 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3386 if (server->server_type == SILC_ROUTER)
3387 server->stat.cell_servers--;
3389 /* Free the server entry */
3390 silc_server_backup_del(server, user_data);
3391 silc_server_backup_replaced_del(server, user_data);
3392 silc_idlist_del_data(user_data);
3393 if (!silc_idlist_del_server(server->local_list, user_data))
3394 silc_idlist_del_server(server->global_list, user_data);
3396 if (backup_router && backup_router != server->id_entry) {
3397 /* Announce all of our stuff that was created about 5 minutes ago.
3398 The backup router knows all the other stuff already. */
3399 if (server->server_type == SILC_ROUTER)
3400 silc_server_announce_servers(server, FALSE, time(0) - 300,
3401 backup_router->connection);
3403 /* Announce our clients and channels to the router */
3404 silc_server_announce_clients(server, time(0) - 300,
3405 backup_router->connection);
3406 silc_server_announce_channels(server, time(0) - 300,
3407 backup_router->connection);
3410 silc_packet_set_context(sock, NULL);
3416 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3418 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3421 if (server->router_conn == idata->sconn) {
3422 if (!server->no_reconnect)
3423 silc_server_create_connections(server);
3424 server->router_conn = NULL;
3427 silc_server_connection_free(idata->sconn);
3428 idata->sconn = NULL;
3430 silc_idlist_del_data(idata);
3432 silc_packet_set_context(sock, NULL);
3438 /* Removes client from all channels it has joined. This is used when client
3439 connection is disconnected. If the client on a channel is last, the
3440 channel is removed as well. This sends the SIGNOFF notify types. */
3442 void silc_server_remove_from_channels(SilcServer server,
3443 SilcPacketStream sock,
3444 SilcClientEntry client,
3446 const char *signoff_message,
3450 SilcChannelEntry channel;
3451 SilcChannelClientEntry chl;
3452 SilcHashTableList htl;
3453 SilcBuffer clidp = NULL;
3458 if (notify && !client->id)
3461 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3462 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3465 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3470 /* Remove the client from all channels. The client is removed from
3471 the channels' user list. */
3472 silc_hash_table_list(client->channels, &htl);
3473 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3474 channel = chl->channel;
3476 /* Remove channel if this is last client leaving the channel, unless
3477 the channel is permanent. */
3478 if (server->server_type != SILC_SERVER &&
3479 silc_hash_table_count(channel->user_list) < 2) {
3480 silc_server_channel_delete(server, channel);
3484 silc_hash_table_del(client->channels, channel);
3485 silc_hash_table_del(channel->user_list, client);
3486 channel->user_count--;
3488 /* If there is no global users on the channel anymore mark the channel
3489 as local channel. Do not check if the removed client is local client. */
3490 if (server->server_type == SILC_SERVER && channel->global_users &&
3491 chl->client->router && !silc_server_channel_has_global(channel))
3492 channel->global_users = FALSE;
3494 memset(chl, 'A', sizeof(*chl));
3497 /* Update statistics */
3498 if (SILC_IS_LOCAL(client))
3499 server->stat.my_chanclients--;
3500 if (server->server_type == SILC_ROUTER) {
3501 server->stat.cell_chanclients--;
3502 server->stat.chanclients--;
3505 /* If there is not at least one local user on the channel then we don't
3506 need the channel entry anymore, we can remove it safely, unless the
3507 channel is permanent channel */
3508 if (server->server_type == SILC_SERVER &&
3509 !silc_server_channel_has_local(channel)) {
3510 /* Notify about leaving client if this channel has global users. */
3511 if (notify && channel->global_users)
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 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3520 silc_server_channel_delete(server, channel);
3524 /* Send notify to channel about client leaving SILC and channel too */
3526 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3527 SILC_NOTIFY_TYPE_SIGNOFF,
3528 signoff_message ? 2 : 1,
3529 clidp->data, silc_buffer_len(clidp),
3530 signoff_message, signoff_message ?
3531 strlen(signoff_message) : 0);
3533 if (killed && clidp) {
3534 /* Remove the client from channel's invite list */
3535 if (channel->invite_list &&
3536 silc_hash_table_count(channel->invite_list)) {
3538 SilcArgumentPayload iargs;
3539 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3540 silc_buffer_len(clidp), 3);
3541 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3542 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3543 silc_buffer_free(ab);
3544 silc_argument_payload_free(iargs);
3548 /* Don't create keys if we are shutting down */
3549 if (server->server_shutdown)
3552 /* Re-generate channel key if needed */
3553 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3554 if (!silc_server_create_channel_key(server, channel, 0))
3557 /* Send the channel key to the channel. The key of course is not sent
3558 to the client who was removed from the channel. */
3559 silc_server_send_channel_key(server, client->connection, channel,
3560 server->server_type == SILC_ROUTER ?
3561 FALSE : !server->standalone);
3565 silc_hash_table_list_reset(&htl);
3567 silc_buffer_free(clidp);
3570 /* Removes client from one channel. This is used for example when client
3571 calls LEAVE command to remove itself from the channel. Returns TRUE
3572 if channel still exists and FALSE if the channel is removed when
3573 last client leaves the channel. If `notify' is FALSE notify messages
3576 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3577 SilcPacketStream sock,
3578 SilcChannelEntry channel,
3579 SilcClientEntry client,
3582 SilcChannelClientEntry chl;
3585 SILC_LOG_DEBUG(("Removing %s from channel %s",
3586 silc_id_render(client->id, SILC_ID_CLIENT),
3587 channel->channel_name));
3589 /* Get the entry to the channel, if this client is not on the channel
3591 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3594 /* Remove channel if this is last client leaving the channel, unless
3595 the channel is permanent. */
3596 if (server->server_type != SILC_SERVER &&
3597 silc_hash_table_count(channel->user_list) < 2) {
3598 silc_server_channel_delete(server, channel);
3602 silc_hash_table_del(client->channels, channel);
3603 silc_hash_table_del(channel->user_list, client);
3604 channel->user_count--;
3606 /* If there is no global users on the channel anymore mark the channel
3607 as local channel. Do not check if the client is local client. */
3608 if (server->server_type == SILC_SERVER && channel->global_users &&
3609 chl->client->router && !silc_server_channel_has_global(channel))
3610 channel->global_users = FALSE;
3612 memset(chl, 'O', sizeof(*chl));
3615 /* Update statistics */
3616 if (SILC_IS_LOCAL(client))
3617 server->stat.my_chanclients--;
3618 if (server->server_type == SILC_ROUTER) {
3619 server->stat.cell_chanclients--;
3620 server->stat.chanclients--;
3623 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3627 /* If there is not at least one local user on the channel then we don't
3628 need the channel entry anymore, we can remove it safely, unless the
3629 channel is permanent channel */
3630 if (server->server_type == SILC_SERVER &&
3631 !silc_server_channel_has_local(channel)) {
3632 /* Notify about leaving client if this channel has global users. */
3633 if (notify && channel->global_users)
3634 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3635 SILC_NOTIFY_TYPE_LEAVE, 1,
3636 clidp->data, silc_buffer_len(clidp));
3638 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3639 silc_server_channel_delete(server, channel);
3640 silc_buffer_free(clidp);
3644 /* Send notify to channel about client leaving the channel */
3646 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3647 SILC_NOTIFY_TYPE_LEAVE, 1,
3648 clidp->data, silc_buffer_len(clidp));
3650 silc_buffer_free(clidp);
3654 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3655 function may be used only by router. In real SILC network all channels
3656 are created by routers thus this function is never used by normal
3659 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3660 SilcServerID *router_id,
3666 SilcChannelID *channel_id;
3667 SilcChannelEntry entry;
3668 SilcCipher send_key, receive_key;
3671 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3674 cipher = SILC_DEFAULT_CIPHER;
3676 hmac = SILC_DEFAULT_HMAC;
3678 /* Allocate cipher */
3679 if (!silc_cipher_alloc(cipher, &send_key))
3681 if (!silc_cipher_alloc(cipher, &receive_key)) {
3682 silc_cipher_free(send_key);
3687 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3688 silc_cipher_free(send_key);
3689 silc_cipher_free(receive_key);
3693 channel_name = strdup(channel_name);
3695 /* Create the channel ID */
3696 if (!silc_id_create_channel_id(server, router_id, server->rng,
3698 silc_free(channel_name);
3699 silc_cipher_free(send_key);
3700 silc_cipher_free(receive_key);
3701 silc_hmac_free(newhmac);
3705 /* Create the channel */
3706 entry = silc_idlist_add_channel(server->local_list, channel_name,
3707 SILC_CHANNEL_MODE_NONE, channel_id,
3708 NULL, send_key, receive_key, newhmac);
3710 silc_free(channel_name);
3711 silc_cipher_free(send_key);
3712 silc_cipher_free(receive_key);
3713 silc_hmac_free(newhmac);
3714 silc_free(channel_id);
3718 entry->cipher = strdup(cipher);
3719 entry->hmac_name = strdup(hmac);
3721 /* Now create the actual key material */
3722 if (!silc_server_create_channel_key(server, entry,
3723 silc_cipher_get_key_len(send_key) / 8)) {
3724 silc_idlist_del_channel(server->local_list, entry);
3728 /* Notify other routers about the new channel. We send the packet
3729 to our primary route. */
3731 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3732 channel_name, entry->id,
3733 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3736 /* Distribute to backup routers */
3737 if (broadcast && server->server_type == SILC_ROUTER) {
3739 unsigned char cid[32];
3740 SilcUInt32 name_len = strlen(channel_name);
3743 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3744 packet = silc_channel_payload_encode(channel_name, name_len,
3745 cid, id_len, entry->mode);
3746 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3747 packet->data, silc_buffer_len(packet), FALSE,
3749 silc_buffer_free(packet);
3752 server->stat.my_channels++;
3753 if (server->server_type == SILC_ROUTER) {
3754 server->stat.channels++;
3755 server->stat.cell_channels++;
3756 entry->users_resolved = TRUE;
3762 /* Same as above but creates the channel with Channel ID `channel_id. */
3765 silc_server_create_new_channel_with_id(SilcServer server,
3769 SilcChannelID *channel_id,
3772 SilcChannelEntry entry;
3773 SilcCipher send_key, receive_key;
3776 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3779 cipher = SILC_DEFAULT_CIPHER;
3781 hmac = SILC_DEFAULT_HMAC;
3783 /* Allocate cipher */
3784 if (!silc_cipher_alloc(cipher, &send_key))
3786 if (!silc_cipher_alloc(cipher, &receive_key)) {
3787 silc_cipher_free(send_key);
3792 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3793 silc_cipher_free(send_key);
3794 silc_cipher_free(receive_key);
3798 channel_name = strdup(channel_name);
3800 /* Create the channel */
3801 entry = silc_idlist_add_channel(server->local_list, channel_name,
3802 SILC_CHANNEL_MODE_NONE, channel_id,
3803 NULL, send_key, receive_key, newhmac);
3805 silc_cipher_free(send_key);
3806 silc_cipher_free(receive_key);
3807 silc_hmac_free(newhmac);
3808 silc_free(channel_name);
3812 /* Now create the actual key material */
3813 if (!silc_server_create_channel_key(server, entry,
3814 silc_cipher_get_key_len(send_key) / 8)) {
3815 silc_idlist_del_channel(server->local_list, entry);
3819 /* Notify other routers about the new channel. We send the packet
3820 to our primary route. */
3822 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3823 channel_name, entry->id,
3824 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3827 /* Distribute to backup routers */
3828 if (broadcast && server->server_type == SILC_ROUTER) {
3830 unsigned char cid[32];
3831 SilcUInt32 name_len = strlen(channel_name);
3834 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3835 packet = silc_channel_payload_encode(channel_name, name_len,
3836 cid, id_len, entry->mode);
3837 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3838 packet->data, silc_buffer_len(packet), FALSE,
3840 silc_buffer_free(packet);
3843 server->stat.my_channels++;
3844 if (server->server_type == SILC_ROUTER) {
3845 server->stat.channels++;
3846 server->stat.cell_channels++;
3847 entry->users_resolved = TRUE;
3853 /* Channel's key re-key timeout callback. */
3855 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3857 SilcServer server = app_context;
3858 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3862 /* Return now if we are shutting down */
3863 if (server->server_shutdown)
3866 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3869 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3872 /* Generates new channel key. This is used to create the initial channel key
3873 but also to re-generate new key for channel. If `key_len' is provided
3874 it is the bytes of the key length. */
3876 SilcBool silc_server_create_channel_key(SilcServer server,
3877 SilcChannelEntry channel,
3881 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3884 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3885 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3889 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3891 if (!channel->send_key)
3892 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3893 channel->send_key = NULL;
3896 if (!channel->receive_key)
3897 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3898 silc_cipher_free(channel->send_key);
3899 channel->send_key = channel->receive_key = NULL;
3905 else if (channel->key_len)
3906 len = channel->key_len / 8;
3908 len = silc_cipher_get_key_len(channel->send_key) / 8;
3910 /* Create channel key */
3911 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3914 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3915 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3917 /* Remove old key if exists */
3919 memset(channel->key, 0, channel->key_len / 8);
3920 silc_free(channel->key);
3924 channel->key_len = len * 8;
3925 channel->key = silc_memdup(channel_key, len);
3926 memset(channel_key, 0, sizeof(channel_key));
3928 /* Generate HMAC key from the channel key data and set it */
3930 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3931 memset(channel->key, 0, channel->key_len / 8);
3932 silc_free(channel->key);
3933 silc_cipher_free(channel->send_key);
3934 silc_cipher_free(channel->receive_key);
3935 channel->send_key = channel->receive_key = NULL;
3938 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3939 silc_hmac_set_key(channel->hmac, hash,
3940 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3941 memset(hash, 0, sizeof(hash));
3943 if (server->server_type == SILC_ROUTER) {
3944 if (!channel->rekey)
3945 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3946 channel->rekey->channel = channel;
3947 channel->rekey->key_len = key_len;
3948 if (channel->rekey->task)
3949 silc_schedule_task_del(server->schedule, channel->rekey->task);
3951 channel->rekey->task =
3952 silc_schedule_task_add_timeout(server->schedule,
3953 silc_server_channel_key_rekey,
3954 (void *)channel->rekey,
3955 server->config->channel_rekey_secs, 0);
3961 /* Saves the channel key found in the encoded `key_payload' buffer. This
3962 function is used when we receive Channel Key Payload and also when we're
3963 processing JOIN command reply. Returns entry to the channel. */
3965 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3966 SilcBuffer key_payload,
3967 SilcChannelEntry channel)
3969 SilcChannelKeyPayload payload = NULL;
3971 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3975 /* Decode channel key payload */
3976 payload = silc_channel_key_payload_parse(key_payload->data,
3977 silc_buffer_len(key_payload));
3979 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3984 /* Get the channel entry */
3987 /* Get channel ID */
3988 tmp = silc_channel_key_get_id(payload, &tmp_len);
3989 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3994 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3996 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3998 if (server->server_type == SILC_ROUTER)
3999 SILC_LOG_ERROR(("Received key for non-existent channel %s",
4000 silc_id_render(&id, SILC_ID_CHANNEL)));
4006 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4008 tmp = silc_channel_key_get_key(payload, &tmp_len);
4014 cipher = silc_channel_key_get_cipher(payload, NULL);
4020 /* Remove old key if exists */
4022 memset(channel->key, 0, channel->key_len / 8);
4023 silc_free(channel->key);
4024 silc_cipher_free(channel->send_key);
4025 silc_cipher_free(channel->receive_key);
4028 /* Create new cipher */
4029 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
4030 channel->send_key = NULL;
4034 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
4035 silc_cipher_free(channel->send_key);
4036 channel->send_key = channel->receive_key = NULL;
4041 if (channel->cipher)
4042 silc_free(channel->cipher);
4043 channel->cipher = strdup(cipher);
4046 channel->key_len = tmp_len * 8;
4047 channel->key = silc_memdup(tmp, tmp_len);
4048 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
4049 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
4051 /* Generate HMAC key from the channel key data and set it */
4053 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4054 memset(channel->key, 0, channel->key_len / 8);
4055 silc_free(channel->key);
4056 silc_cipher_free(channel->send_key);
4057 silc_cipher_free(channel->receive_key);
4058 channel->send_key = channel->receive_key = NULL;
4061 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4062 silc_hmac_set_key(channel->hmac, hash,
4063 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4065 memset(hash, 0, sizeof(hash));
4066 memset(tmp, 0, tmp_len);
4068 if (server->server_type == SILC_ROUTER) {
4069 if (!channel->rekey)
4070 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4071 channel->rekey->channel = channel;
4072 if (channel->rekey->task)
4073 silc_schedule_task_del(server->schedule, channel->rekey->task);
4075 channel->rekey->task =
4076 silc_schedule_task_add_timeout(server->schedule,
4077 silc_server_channel_key_rekey,
4078 (void *)channel->rekey,
4079 server->config->channel_rekey_secs, 0);
4084 silc_channel_key_payload_free(payload);
4089 /* Returns assembled of all servers in the given ID list. The packet's
4090 form is dictated by the New ID payload. */
4092 static void silc_server_announce_get_servers(SilcServer server,
4093 SilcServerEntry remote,
4095 SilcBuffer *servers,
4096 unsigned long creation_time)
4099 SilcIDCacheEntry id_cache;
4100 SilcServerEntry entry;
4104 /* Go through all clients in the list */
4105 if (silc_idcache_get_all(id_list->servers, &list)) {
4106 silc_list_start(list);
4107 while ((id_cache = silc_list_get(list))) {
4108 entry = (SilcServerEntry)id_cache->context;
4110 /* Do not announce the one we've sending our announcements and
4111 do not announce ourself. Also check the creation time if it's
4113 if ((entry == remote) || (entry == server->id_entry) ||
4114 (creation_time && entry->data.created < creation_time))
4117 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4119 tmp = silc_buffer_realloc(*servers,
4121 silc_buffer_truelen((*servers)) +
4122 silc_buffer_len(idp) :
4123 silc_buffer_len(idp)));
4127 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4128 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4129 silc_buffer_pull(*servers, silc_buffer_len(idp));
4130 silc_buffer_free(idp);
4136 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4142 p = silc_notify_payload_encode(notify, argc, ap);
4148 /* This function is used by router to announce existing servers to our
4149 primary router when we've connected to it. If `creation_time' is non-zero
4150 then only the servers that has been created after the `creation_time'
4151 will be announced. */
4153 void silc_server_announce_servers(SilcServer server, SilcBool global,
4154 unsigned long creation_time,
4155 SilcPacketStream remote)
4157 SilcBuffer servers = NULL;
4159 SILC_LOG_DEBUG(("Announcing servers"));
4161 /* Get servers in local list */
4162 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4163 server->local_list, &servers,
4167 /* Get servers in global list */
4168 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4169 server->global_list, &servers,
4173 silc_buffer_push(servers, servers->data - servers->head);
4174 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4176 /* Send the packet */
4177 silc_server_packet_send(server, remote,
4178 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4179 servers->data, silc_buffer_len(servers));
4181 silc_buffer_free(servers);
4185 /* Returns assembled packet of all clients in the given ID list. The
4186 packet's form is dictated by the New ID Payload. */
4188 static void silc_server_announce_get_clients(SilcServer server,
4190 SilcBuffer *clients,
4192 unsigned long creation_time)
4195 SilcIDCacheEntry id_cache;
4196 SilcClientEntry client;
4199 unsigned char mode[4];
4202 /* Go through all clients in the list */
4203 if (silc_idcache_get_all(id_list->clients, &list)) {
4204 silc_list_start(list);
4205 while ((id_cache = silc_list_get(list))) {
4206 client = (SilcClientEntry)id_cache->context;
4208 if (creation_time && client->data.created < creation_time)
4210 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4212 if (!client->connection && !client->router)
4215 SILC_LOG_DEBUG(("Announce Client ID %s",
4216 silc_id_render(client->id, SILC_ID_CLIENT)));
4218 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4222 tmp2 = silc_buffer_realloc(*clients,
4224 silc_buffer_truelen((*clients)) +
4225 silc_buffer_len(idp) :
4226 silc_buffer_len(idp)));
4230 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4231 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4232 silc_buffer_pull(*clients, silc_buffer_len(idp));
4234 SILC_PUT32_MSB(client->mode, mode);
4236 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4237 2, idp->data, silc_buffer_len(idp),
4239 tmp2 = silc_buffer_realloc(*umodes,
4241 silc_buffer_truelen((*umodes)) +
4242 silc_buffer_len(tmp) :
4243 silc_buffer_len(tmp)));
4247 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4248 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4249 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4250 silc_buffer_free(tmp);
4252 silc_buffer_free(idp);
4257 /* This function is used to announce our existing clients to our router
4258 when we've connected to it. If `creation_time' is non-zero then only
4259 the clients that has been created after the `creation_time' will be
4262 void silc_server_announce_clients(SilcServer server,
4263 unsigned long creation_time,
4264 SilcPacketStream remote)
4266 SilcBuffer clients = NULL;
4267 SilcBuffer umodes = NULL;
4269 SILC_LOG_DEBUG(("Announcing clients"));
4271 /* Get clients in local list */
4272 silc_server_announce_get_clients(server, server->local_list,
4273 &clients, &umodes, creation_time);
4275 /* As router we announce our global list as well */
4276 if (server->server_type == SILC_ROUTER)
4277 silc_server_announce_get_clients(server, server->global_list,
4278 &clients, &umodes, creation_time);
4281 silc_buffer_push(clients, clients->data - clients->head);
4282 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4284 /* Send the packet */
4285 silc_server_packet_send(server, remote,
4286 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4287 clients->data, silc_buffer_len(clients));
4289 silc_buffer_free(clients);
4293 silc_buffer_push(umodes, umodes->data - umodes->head);
4294 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4296 /* Send the packet */
4297 silc_server_packet_send(server, remote,
4298 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4299 umodes->data, silc_buffer_len(umodes));
4301 silc_buffer_free(umodes);
4305 /* Returns channel's topic for announcing it */
4307 void silc_server_announce_get_channel_topic(SilcServer server,
4308 SilcChannelEntry channel,
4313 if (channel->topic) {
4314 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4315 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4317 silc_buffer_len(chidp),
4319 strlen(channel->topic));
4320 silc_buffer_free(chidp);
4324 /* Returns channel's invite and ban lists */
4326 void silc_server_announce_get_inviteban(SilcServer server,
4327 SilcChannelEntry channel,
4331 SilcBuffer list, idp, idp2, tmp2;
4334 SilcHashTableList htl;
4335 const unsigned char a[1] = { 0x03 };
4337 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4339 /* Encode invite list */
4340 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4341 list = silc_buffer_alloc_size(2);
4342 type = silc_hash_table_count(channel->invite_list);
4343 SILC_PUT16_MSB(type, list->data);
4344 silc_hash_table_list(channel->invite_list, &htl);
4345 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4346 list = silc_argument_payload_encode_one(list, tmp2->data,
4347 silc_buffer_len(tmp2),
4348 SILC_PTR_TO_32(ptype));
4349 silc_hash_table_list_reset(&htl);
4351 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4353 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4354 idp->data, silc_buffer_len(idp),
4355 channel->channel_name,
4356 strlen(channel->channel_name),
4357 idp2->data, silc_buffer_len(idp2),
4359 list->data, silc_buffer_len(list));
4360 silc_buffer_free(idp2);
4361 silc_buffer_free(list);
4364 /* Encode ban list */
4365 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4366 list = silc_buffer_alloc_size(2);
4367 type = silc_hash_table_count(channel->ban_list);
4368 SILC_PUT16_MSB(type, list->data);
4369 silc_hash_table_list(channel->ban_list, &htl);
4370 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4371 list = silc_argument_payload_encode_one(list, tmp2->data,
4372 silc_buffer_len(tmp2),
4373 SILC_PTR_TO_32(ptype));
4374 silc_hash_table_list_reset(&htl);
4377 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4378 idp->data, silc_buffer_len(idp),
4380 list->data, silc_buffer_len(list));
4381 silc_buffer_free(list);
4384 silc_buffer_free(idp);
4387 /* Returns assembled packets for channel users of the `channel'. */
4389 void silc_server_announce_get_channel_users(SilcServer server,
4390 SilcChannelEntry channel,
4391 SilcBuffer *channel_modes,
4392 SilcBuffer *channel_users,
4393 SilcBuffer *channel_users_modes)
4395 SilcChannelClientEntry chl;
4396 SilcHashTableList htl;
4397 SilcBuffer chidp, clidp, csidp;
4398 SilcBuffer tmp, fkey = NULL, chpklist;
4400 unsigned char mode[4], ulimit[4];
4404 SILC_LOG_DEBUG(("Start"));
4406 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4407 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4408 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4411 SILC_PUT32_MSB(channel->mode, mode);
4412 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4413 SILC_PUT32_MSB(channel->user_limit, ulimit);
4414 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4415 if (channel->founder_key)
4416 fkey = silc_public_key_payload_encode(channel->founder_key);
4418 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4420 silc_buffer_len(csidp),
4423 hmac, hmac ? strlen(hmac) : 0,
4424 channel->passphrase,
4425 channel->passphrase ?
4426 strlen(channel->passphrase) : 0,
4427 fkey ? fkey->data : NULL,
4428 fkey ? silc_buffer_len(fkey) : 0,
4429 chpklist ? chpklist->data : NULL,
4431 silc_buffer_len(chpklist) : 0,
4433 SILC_CHANNEL_MODE_ULIMIT ?
4436 SILC_CHANNEL_MODE_ULIMIT ?
4437 sizeof(ulimit) : 0));
4438 len = silc_buffer_len(tmp);
4440 silc_buffer_realloc(*channel_modes,
4442 silc_buffer_truelen((*channel_modes)) + len : len));
4445 *channel_modes = tmp2;
4446 silc_buffer_pull_tail(*channel_modes,
4447 ((*channel_modes)->end -
4448 (*channel_modes)->data));
4449 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4450 silc_buffer_pull(*channel_modes, len);
4451 silc_buffer_free(tmp);
4452 silc_buffer_free(fkey);
4455 /* Now find all users on the channel */
4456 silc_hash_table_list(channel->user_list, &htl);
4457 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4458 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4460 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4464 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4466 silc_buffer_len(clidp),
4468 silc_buffer_len(chidp));
4469 len = silc_buffer_len(tmp);
4471 silc_buffer_realloc(*channel_users,
4473 silc_buffer_truelen((*channel_users)) + len : len));
4476 *channel_users = tmp2;
4477 silc_buffer_pull_tail(*channel_users,
4478 ((*channel_users)->end -
4479 (*channel_users)->data));
4481 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4482 silc_buffer_pull(*channel_users, len);
4483 silc_buffer_free(tmp);
4485 /* CUMODE notify for mode change on the channel */
4486 SILC_PUT32_MSB(chl->mode, mode);
4487 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4488 fkey = silc_public_key_payload_encode(channel->founder_key);
4489 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4491 silc_buffer_len(csidp),
4494 silc_buffer_len(clidp),
4495 fkey ? fkey->data : NULL,
4496 fkey ? silc_buffer_len(fkey) : 0);
4497 len = silc_buffer_len(tmp);
4499 silc_buffer_realloc(*channel_users_modes,
4500 (*channel_users_modes ?
4501 silc_buffer_truelen((*channel_users_modes)) +
4505 *channel_users_modes = tmp2;
4506 silc_buffer_pull_tail(*channel_users_modes,
4507 ((*channel_users_modes)->end -
4508 (*channel_users_modes)->data));
4510 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4511 silc_buffer_pull(*channel_users_modes, len);
4512 silc_buffer_free(tmp);
4513 silc_buffer_free(fkey);
4515 silc_buffer_free(clidp);
4517 silc_hash_table_list_reset(&htl);
4518 silc_buffer_free(chidp);
4519 silc_buffer_free(csidp);
4522 /* Returns assembled packets for all channels and users on those channels
4523 from the given ID List. The packets are in the form dictated by the
4524 New Channel and New Channel User payloads. */
4526 void silc_server_announce_get_channels(SilcServer server,
4528 SilcBuffer *channels,
4529 SilcBuffer **channel_modes,
4530 SilcBuffer *channel_users,
4531 SilcBuffer **channel_users_modes,
4532 SilcUInt32 *channel_users_modes_c,
4533 SilcBuffer **channel_topics,
4534 SilcBuffer **channel_invites,
4535 SilcBuffer **channel_bans,
4536 SilcChannelID ***channel_ids,
4537 unsigned long creation_time)
4540 SilcIDCacheEntry id_cache;
4541 SilcChannelEntry channel;
4542 unsigned char cid[32];
4544 SilcUInt16 name_len;
4546 int i = *channel_users_modes_c;
4550 SILC_LOG_DEBUG(("Start"));
4552 /* Go through all channels in the list */
4553 if (silc_idcache_get_all(id_list->channels, &list)) {
4554 silc_list_start(list);
4555 while ((id_cache = silc_list_get(list))) {
4556 channel = (SilcChannelEntry)id_cache->context;
4558 if (creation_time && channel->created < creation_time)
4563 SILC_LOG_DEBUG(("Announce Channel ID %s",
4564 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4566 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4567 name_len = strlen(channel->channel_name);
4570 len = 4 + name_len + id_len + 4;
4572 silc_buffer_realloc(*channels,
4574 silc_buffer_truelen((*channels)) +
4580 silc_buffer_pull_tail(*channels,
4581 ((*channels)->end - (*channels)->data));
4582 silc_buffer_format(*channels,
4583 SILC_STR_UI_SHORT(name_len),
4584 SILC_STR_UI_XNSTRING(channel->channel_name,
4586 SILC_STR_UI_SHORT(id_len),
4587 SILC_STR_UI_XNSTRING(cid, id_len),
4588 SILC_STR_UI_INT(channel->mode),
4590 silc_buffer_pull(*channels, len);
4593 if (creation_time && channel->updated < creation_time)
4599 /* Channel user modes */
4600 tmp = silc_realloc(*channel_users_modes,
4601 sizeof(**channel_users_modes) * (i + 1));
4604 *channel_users_modes = tmp;
4605 (*channel_users_modes)[i] = NULL;
4606 tmp = silc_realloc(*channel_modes,
4607 sizeof(**channel_modes) * (i + 1));
4610 *channel_modes = tmp;
4611 (*channel_modes)[i] = NULL;
4612 tmp = silc_realloc(*channel_ids,
4613 sizeof(**channel_ids) * (i + 1));
4617 (*channel_ids)[i] = NULL;
4618 silc_server_announce_get_channel_users(server, channel,
4619 &(*channel_modes)[i],
4621 &(*channel_users_modes)[i]);
4622 (*channel_ids)[i] = channel->id;
4624 /* Channel's topic */
4625 tmp = silc_realloc(*channel_topics,
4626 sizeof(**channel_topics) * (i + 1));
4629 *channel_topics = tmp;
4630 (*channel_topics)[i] = NULL;
4631 silc_server_announce_get_channel_topic(server, channel,
4632 &(*channel_topics)[i]);
4634 /* Channel's invite and ban list */
4635 tmp = silc_realloc(*channel_invites,
4636 sizeof(**channel_invites) * (i + 1));
4639 *channel_invites = tmp;
4640 (*channel_invites)[i] = NULL;
4641 tmp = silc_realloc(*channel_bans,
4642 sizeof(**channel_bans) * (i + 1));
4645 *channel_bans = tmp;
4646 (*channel_bans)[i] = NULL;
4647 silc_server_announce_get_inviteban(server, channel,
4648 &(*channel_invites)[i],
4649 &(*channel_bans)[i]);
4651 (*channel_users_modes_c)++;
4659 /* This function is used to announce our existing channels to our router
4660 when we've connected to it. This also announces the users on the
4661 channels to the router. If the `creation_time' is non-zero only the
4662 channels that was created after the `creation_time' are announced.
4663 Note that the channel users are still announced even if the `creation_time'
4666 void silc_server_announce_channels(SilcServer server,
4667 unsigned long creation_time,
4668 SilcPacketStream remote)
4670 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4671 SilcBuffer *channel_users_modes = NULL;
4672 SilcBuffer *channel_topics = NULL;
4673 SilcBuffer *channel_invites = NULL;
4674 SilcBuffer *channel_bans = NULL;
4675 SilcUInt32 channel_users_modes_c = 0;
4676 SilcChannelID **channel_ids = NULL;
4678 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4680 /* Get channels and channel users in local list */
4681 silc_server_announce_get_channels(server, server->local_list,
4682 &channels, &channel_modes,
4684 &channel_users_modes,
4685 &channel_users_modes_c,
4689 &channel_ids, creation_time);
4691 /* Get channels and channel users in global list */
4692 if (server->server_type != SILC_SERVER)
4693 silc_server_announce_get_channels(server, server->global_list,
4694 &channels, &channel_modes,
4696 &channel_users_modes,
4697 &channel_users_modes_c,
4701 &channel_ids, creation_time);
4704 silc_buffer_push(channels, channels->data - channels->head);
4705 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4707 /* Send the packet */
4708 silc_server_packet_send(server, remote,
4709 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4710 channels->data, silc_buffer_len(channels));
4712 silc_buffer_free(channels);
4715 if (channel_users) {
4716 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4717 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4718 silc_buffer_len(channel_users));
4720 /* Send the packet */
4721 silc_server_packet_send(server, remote,
4722 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4723 channel_users->data, silc_buffer_len(channel_users));
4725 silc_buffer_free(channel_users);
4728 if (channel_modes) {
4731 for (i = 0; i < channel_users_modes_c; i++) {
4732 if (!channel_modes[i])
4734 silc_buffer_push(channel_modes[i],
4735 channel_modes[i]->data -
4736 channel_modes[i]->head);
4737 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4738 silc_buffer_len(channel_modes[i]));
4739 silc_server_packet_send_dest(server, remote,
4740 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4741 channel_ids[i], SILC_ID_CHANNEL,
4742 channel_modes[i]->data,
4743 silc_buffer_len(channel_modes[i]));
4744 silc_buffer_free(channel_modes[i]);
4746 silc_free(channel_modes);
4749 if (channel_users_modes) {
4752 for (i = 0; i < channel_users_modes_c; i++) {
4753 if (!channel_users_modes[i])
4755 silc_buffer_push(channel_users_modes[i],
4756 channel_users_modes[i]->data -
4757 channel_users_modes[i]->head);
4758 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4759 silc_buffer_len(channel_users_modes[i]));
4760 silc_server_packet_send_dest(server, remote,
4761 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4762 channel_ids[i], SILC_ID_CHANNEL,
4763 channel_users_modes[i]->data,
4764 silc_buffer_len(channel_users_modes[i]));
4765 silc_buffer_free(channel_users_modes[i]);
4767 silc_free(channel_users_modes);
4770 if (channel_topics) {
4773 for (i = 0; i < channel_users_modes_c; i++) {
4774 if (!channel_topics[i])
4777 silc_buffer_push(channel_topics[i],
4778 channel_topics[i]->data -
4779 channel_topics[i]->head);
4780 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4781 silc_buffer_len(channel_topics[i]));
4782 silc_server_packet_send_dest(server, remote,
4783 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4784 channel_ids[i], SILC_ID_CHANNEL,
4785 channel_topics[i]->data,
4786 silc_buffer_len(channel_topics[i]));
4787 silc_buffer_free(channel_topics[i]);
4789 silc_free(channel_topics);
4792 if (channel_invites) {
4795 for (i = 0; i < channel_users_modes_c; i++) {
4796 if (!channel_invites[i])
4799 silc_buffer_push(channel_invites[i],
4800 channel_invites[i]->data -
4801 channel_invites[i]->head);
4802 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4803 silc_buffer_len(channel_invites[i]));
4804 silc_server_packet_send_dest(server, remote,
4805 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4806 channel_ids[i], SILC_ID_CHANNEL,
4807 channel_invites[i]->data,
4808 silc_buffer_len(channel_invites[i]));
4809 silc_buffer_free(channel_invites[i]);
4811 silc_free(channel_invites);
4817 for (i = 0; i < channel_users_modes_c; i++) {
4818 if (!channel_bans[i])
4821 silc_buffer_push(channel_bans[i],
4822 channel_bans[i]->data -
4823 channel_bans[i]->head);
4824 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4825 silc_buffer_len(channel_bans[i]));
4826 silc_server_packet_send_dest(server, remote,
4827 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4828 channel_ids[i], SILC_ID_CHANNEL,
4829 channel_bans[i]->data,
4830 silc_buffer_len(channel_bans[i]));
4831 silc_buffer_free(channel_bans[i]);
4833 silc_free(channel_bans);
4836 silc_free(channel_ids);
4839 /* Announces WATCH list. */
4841 void silc_server_announce_watches(SilcServer server,
4842 SilcPacketStream remote)
4844 SilcHashTableList htl;
4845 SilcBuffer buffer, idp, args, pkp;
4846 SilcClientEntry client;
4849 SILC_LOG_DEBUG(("Announcing watch list"));
4851 /* XXX because way we save the nicks (hash) we cannot announce them. */
4853 /* XXX we should send all public keys in one command if client is
4854 watching more than one key */
4855 silc_hash_table_list(server->watcher_list_pk, &htl);
4856 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4857 if (!client || !client->id)
4860 server->stat.commands_sent++;
4862 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4863 args = silc_buffer_alloc_size(2);
4864 silc_buffer_format(args,
4865 SILC_STR_UI_SHORT(1),
4867 pkp = silc_public_key_payload_encode(key);
4868 args = silc_argument_payload_encode_one(args, pkp->data,
4869 silc_buffer_len(pkp), 0x00);
4870 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4871 ++server->cmd_ident, 2,
4872 1, idp->data, silc_buffer_len(idp),
4874 silc_buffer_len(args));
4877 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4878 buffer->data, silc_buffer_len(buffer));
4880 silc_buffer_free(pkp);
4881 silc_buffer_free(args);
4882 silc_buffer_free(idp);
4883 silc_buffer_free(buffer);
4885 silc_hash_table_list_reset(&htl);
4888 /* Assembles user list and users mode list from the `channel'. */
4890 SilcBool silc_server_get_users_on_channel(SilcServer server,
4891 SilcChannelEntry channel,
4892 SilcBuffer *user_list,
4893 SilcBuffer *mode_list,
4894 SilcUInt32 *user_count)
4896 SilcChannelClientEntry chl;
4897 SilcHashTableList htl;
4898 SilcBuffer client_id_list;
4899 SilcBuffer client_mode_list;
4901 SilcUInt32 list_count = 0, len = 0;
4903 if (!silc_hash_table_count(channel->user_list))
4906 silc_hash_table_list(channel->user_list, &htl);
4907 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4908 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4909 silc_hash_table_list_reset(&htl);
4911 client_id_list = silc_buffer_alloc(len);
4913 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4914 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4915 silc_buffer_pull_tail(client_mode_list,
4916 silc_buffer_truelen(client_mode_list));
4918 silc_hash_table_list(channel->user_list, &htl);
4919 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4921 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4922 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4923 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4924 silc_buffer_free(idp);
4926 /* Client's mode on channel */
4927 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4928 silc_buffer_pull(client_mode_list, 4);
4932 silc_hash_table_list_reset(&htl);
4933 silc_buffer_push(client_id_list,
4934 client_id_list->data - client_id_list->head);
4935 silc_buffer_push(client_mode_list,
4936 client_mode_list->data - client_mode_list->head);
4938 *user_list = client_id_list;
4939 *mode_list = client_mode_list;
4940 *user_count = list_count;
4944 /* Saves users and their modes to the `channel'. */
4946 void silc_server_save_users_on_channel(SilcServer server,
4947 SilcPacketStream sock,
4948 SilcChannelEntry channel,
4949 SilcClientID *noadd,
4950 SilcBuffer user_list,
4951 SilcBuffer mode_list,
4952 SilcUInt32 user_count)
4958 SilcClientEntry client;
4959 SilcIDCacheEntry cache;
4960 SilcChannelClientEntry chl;
4962 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4963 channel->channel_name));
4965 for (i = 0; i < user_count; i++) {
4967 SILC_GET16_MSB(idp_len, user_list->data + 2);
4969 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4971 silc_buffer_pull(user_list, idp_len);
4974 SILC_GET32_MSB(mode, mode_list->data);
4975 silc_buffer_pull(mode_list, 4);
4977 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4982 /* Check if we have this client cached already. */
4983 client = silc_idlist_find_client_by_id(server->local_list,
4985 server->server_type, &cache);
4987 client = silc_idlist_find_client_by_id(server->global_list,
4989 server->server_type, &cache);
4991 /* If router did not find such Client ID in its lists then this must
4992 be bogus client or some router in the net is buggy. */
4993 if (server->server_type != SILC_SERVER)
4996 /* We don't have that client anywhere, add it. The client is added
4997 to global list since server didn't have it in the lists so it must be
4999 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
5000 silc_id_dup(&id.u.client_id,
5002 silc_packet_get_context(sock),
5005 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5009 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5012 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5013 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5014 "%s", channel->channel_name));
5018 if (!silc_server_client_on_channel(client, channel, &chl)) {
5019 /* Client was not on the channel, add it. */
5020 chl = silc_calloc(1, sizeof(*chl));
5021 chl->client = client;
5023 chl->channel = channel;
5024 silc_hash_table_add(channel->user_list, chl->client, chl);
5025 silc_hash_table_add(client->channels, chl->channel, chl);
5026 channel->user_count++;
5034 /* Saves channels and channels user modes to the `client'. Removes
5035 the client from those channels that are not sent in the list but
5038 void silc_server_save_user_channels(SilcServer server,
5039 SilcPacketStream sock,
5040 SilcClientEntry client,
5041 SilcBuffer channels,
5042 SilcBuffer channels_user_modes)
5045 SilcUInt32 *chumodes;
5046 SilcChannelPayload entry;
5047 SilcChannelEntry channel;
5048 SilcChannelID channel_id;
5049 SilcChannelClientEntry chl;
5050 SilcHashTable ht = NULL;
5051 SilcHashTableList htl;
5055 if (!channels || !channels_user_modes ||
5056 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5059 ch = silc_channel_payload_parse_list(channels->data,
5060 silc_buffer_len(channels));
5061 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5063 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5064 NULL, NULL, NULL, TRUE);
5065 silc_dlist_start(ch);
5066 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5067 /* Check if we have this channel, and add it if we don't have it.
5068 Also add the client on the channel unless it is there already. */
5069 if (!silc_channel_get_id_parse(entry, &channel_id))
5071 channel = silc_idlist_find_channel_by_id(server->local_list,
5074 channel = silc_idlist_find_channel_by_id(server->global_list,
5077 if (server->server_type != SILC_SERVER) {
5082 /* We don't have that channel anywhere, add it. */
5083 name = silc_channel_get_name(entry, NULL);
5084 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5085 silc_id_dup(&channel_id,
5087 server->router, NULL, NULL, 0);
5094 channel->mode = silc_channel_get_mode(entry);
5096 /* Add the client on the channel */
5097 if (!silc_server_client_on_channel(client, channel, &chl)) {
5098 chl = silc_calloc(1, sizeof(*chl));
5099 chl->client = client;
5100 chl->mode = chumodes[i++];
5101 chl->channel = channel;
5102 silc_hash_table_add(channel->user_list, chl->client, chl);
5103 silc_hash_table_add(client->channels, chl->channel, chl);
5104 channel->user_count++;
5107 chl->mode = chumodes[i++];
5110 silc_hash_table_add(ht, channel, channel);
5112 silc_channel_payload_list_free(ch);
5113 silc_free(chumodes);
5117 /* Go through the list again and remove client from channels that
5118 are no part of the list. */
5120 silc_hash_table_list(client->channels, &htl);
5121 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5122 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5123 silc_hash_table_del(chl->channel->user_list, chl->client);
5124 silc_hash_table_del(chl->client->channels, chl->channel);
5128 silc_hash_table_list_reset(&htl);
5129 silc_hash_table_free(ht);
5131 silc_hash_table_list(client->channels, &htl);
5132 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5133 silc_hash_table_del(chl->channel->user_list, chl->client);
5134 silc_hash_table_del(chl->client->channels, chl->channel);
5137 silc_hash_table_list_reset(&htl);
5141 /* Lookups route to the client indicated by the `id_data'. The connection
5142 object and internal data object is returned. Returns NULL if route
5143 could not be found to the client. If the `client_id' is specified then
5144 it is used and the `id_data' is ignored. */
5147 silc_server_get_client_route(SilcServer server,
5148 unsigned char *id_data,
5150 SilcClientID *client_id,
5151 SilcIDListData *idata,
5152 SilcClientEntry *client_entry)
5154 SilcClientID *id, clid;
5155 SilcClientEntry client;
5157 SILC_LOG_DEBUG(("Start"));
5160 *client_entry = NULL;
5162 /* Decode destination Client ID */
5164 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5166 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5168 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5171 /* If the destination belongs to our server we don't have to route
5172 the packet anywhere but to send it to the local destination. */
5173 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5177 /* If we are router and the client has router then the client is in
5178 our cell but not directly connected to us. */
5179 if (server->server_type == SILC_ROUTER && client->router) {
5180 /* We are of course in this case the client's router thus the route
5181 to the client is the server who owns the client. So, we will send
5182 the packet to that server. */
5184 *idata = (SilcIDListData)client->router;
5185 return client->router->connection;
5188 /* Seems that client really is directly connected to us */
5190 *idata = (SilcIDListData)client;
5192 *client_entry = client;
5193 return client->connection;
5196 /* Destination belongs to someone not in this server. If we are normal
5197 server our action is to send the packet to our router. */
5198 if (server->server_type != SILC_ROUTER && !server->standalone) {
5201 *idata = (SilcIDListData)server->router;
5202 return SILC_PRIMARY_ROUTE(server);
5205 /* We are router and we will perform route lookup for the destination
5206 and send the packet to fastest route. */
5207 if (server->server_type == SILC_ROUTER && !server->standalone) {
5208 /* Check first that the ID is valid */
5209 client = silc_idlist_find_client_by_id(server->global_list, id,
5212 SilcPacketStream dst_sock;
5214 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5217 if (idata && dst_sock)
5218 *idata = silc_packet_get_context(dst_sock);
5227 /* Encodes and returns channel list of channels the `client' has joined.
5228 Secret channels are not put to the list. */
5230 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5231 SilcClientEntry client,
5232 SilcBool get_private,
5233 SilcBool get_secret,
5234 SilcBuffer *user_mode_list)
5236 SilcBuffer buffer = NULL;
5237 SilcChannelEntry channel;
5238 SilcChannelClientEntry chl;
5239 SilcHashTableList htl;
5240 unsigned char cid[32];
5242 SilcUInt16 name_len;
5246 *user_mode_list = NULL;
5248 silc_hash_table_list(client->channels, &htl);
5249 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5250 channel = chl->channel;
5252 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5254 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5257 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5258 name_len = strlen(channel->channel_name);
5260 len = 4 + name_len + id_len + 4;
5261 buffer = silc_buffer_realloc(buffer,
5263 silc_buffer_truelen(buffer) + len : len));
5264 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5265 silc_buffer_format(buffer,
5266 SILC_STR_UI_SHORT(name_len),
5267 SILC_STR_DATA(channel->channel_name, name_len),
5268 SILC_STR_UI_SHORT(id_len),
5269 SILC_STR_DATA(cid, id_len),
5270 SILC_STR_UI_INT(chl->channel->mode),
5272 silc_buffer_pull(buffer, len);
5274 if (user_mode_list) {
5276 silc_buffer_realloc(*user_mode_list,
5278 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5279 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5280 (*user_mode_list)->data));
5281 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5282 silc_buffer_pull(*user_mode_list, 4);
5285 silc_hash_table_list_reset(&htl);
5288 silc_buffer_push(buffer, buffer->data - buffer->head);
5289 if (user_mode_list && *user_mode_list)
5290 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5291 (*user_mode_list)->head));
5296 /* Task callback used to retrieve network statistical information from
5297 router server once in a while. */
5299 SILC_TASK_CALLBACK(silc_server_get_stats)
5301 SilcServer server = (SilcServer)context;
5302 SilcBuffer idp, packet;
5304 if (!server->standalone) {
5305 SILC_LOG_DEBUG(("Retrieving stats from router"));
5306 server->stat.commands_sent++;
5307 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5309 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5310 ++server->cmd_ident, 1,
5312 silc_buffer_len(idp));
5313 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5314 SILC_PACKET_COMMAND, 0, packet->data,
5315 silc_buffer_len(packet));
5316 silc_buffer_free(packet);
5317 silc_buffer_free(idp);
5321 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,