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,
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 silc_packet_set_context(sconn->sock, entry);
1803 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1805 /* Set Key Exchange flags from configuration, but fall back to global
1807 memset(¶ms, 0, sizeof(params));
1808 SILC_GET_SKE_FLAGS(conn, params.flags);
1809 if (server->config->param.key_exchange_pfs)
1810 params.flags |= SILC_SKE_SP_FLAG_PFS;
1812 /* Start SILC Key Exchange protocol */
1813 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1814 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1815 server->public_key, server->private_key, sconn);
1818 silc_packet_stream_destroy(sconn->sock);
1820 /* Try reconnecting if configuration wants it */
1821 if (!sconn->no_reconnect) {
1822 silc_schedule_task_add_timeout(server->schedule,
1823 silc_server_connect_to_router_retry,
1825 silc_dlist_del(server->conns, sconn);
1829 if (sconn->callback)
1830 (*sconn->callback)(server, NULL, sconn->callback_context);
1831 silc_server_connection_free(sconn);
1834 silc_ske_set_callbacks(ske, silc_server_verify_key,
1835 silc_server_ke_completed, sconn->sock);
1837 /* Start key exchange protocol */
1838 params.version = silc_version_string;
1839 params.timeout_secs = server->config->key_exchange_timeout;
1840 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1843 /* Timeout callback that will be called to retry connecting to remote
1844 router. This is used by both normal and router server. This will wait
1845 before retrying the connecting. The timeout is generated by exponential
1846 backoff algorithm. */
1848 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1850 SilcServerConnection sconn = context;
1851 SilcServer server = sconn->server;
1852 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1853 SilcServerConfigConnParams *param =
1854 (conn->param ? conn->param : &server->config->param);
1856 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1857 sconn->remote_port));
1859 /* Calculate next timeout */
1860 if (sconn->retry_count >= 1) {
1861 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1862 if (sconn->retry_timeout > param->reconnect_interval_max)
1863 sconn->retry_timeout = param->reconnect_interval_max;
1865 sconn->retry_timeout = param->reconnect_interval;
1867 sconn->retry_count++;
1868 sconn->retry_timeout = sconn->retry_timeout +
1869 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1871 /* If we've reached max retry count, give up. */
1872 if ((sconn->retry_count > param->reconnect_count) &&
1873 sconn->no_reconnect) {
1874 SILC_LOG_ERROR(("Could not connect, giving up"));
1876 if (sconn->callback)
1877 (*sconn->callback)(server, NULL, sconn->callback_context);
1878 silc_server_connection_free(sconn);
1882 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1884 /* We will lookup a fresh pointer later */
1885 silc_server_config_unref(&sconn->conn);
1887 /* Wait before retrying */
1888 silc_schedule_task_del_by_context(server->schedule, sconn);
1889 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1890 sconn, sconn->retry_timeout, 0);
1893 /* Callback for async connection to remote router */
1895 static void silc_server_connection_established(SilcNetStatus status,
1899 SilcServerConnection sconn = context;
1900 SilcServer server = sconn->server;
1902 silc_schedule_task_del_by_context(server->schedule, sconn);
1907 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1908 sconn->remote_host, sconn->remote_port));
1910 /* Continue with key exchange protocol */
1911 sconn->stream = stream;
1912 silc_server_start_key_exchange(sconn);
1915 case SILC_NET_UNKNOWN_IP:
1916 case SILC_NET_UNKNOWN_HOST:
1917 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1918 sconn->remote_host, sconn->remote_port,
1919 silc_net_get_error_string(status)));
1920 if (!sconn->no_reconnect) {
1921 silc_schedule_task_add_timeout(sconn->server->schedule,
1922 silc_server_connect_to_router_retry,
1924 silc_dlist_del(server->conns, sconn);
1926 if (sconn->callback)
1927 (*sconn->callback)(server, NULL, sconn->callback_context);
1928 silc_server_connection_free(sconn);
1933 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1934 sconn->remote_host, sconn->remote_port,
1935 silc_net_get_error_string(status)));
1936 if (!sconn->no_reconnect) {
1937 silc_schedule_task_add_timeout(sconn->server->schedule,
1938 silc_server_connect_to_router_retry,
1940 silc_dlist_del(server->conns, sconn);
1942 if (sconn->callback)
1943 (*sconn->callback)(server, NULL, sconn->callback_context);
1944 silc_server_connection_free(sconn);
1950 /* Generic routine to use connect to a router. */
1952 SILC_TASK_CALLBACK(silc_server_connect_router)
1954 SilcServerConnection sconn = context;
1955 SilcServer server = sconn->server;
1956 SilcServerConfigRouter *rconn;
1958 silc_schedule_task_del_by_context(server->schedule, sconn);
1960 /* Don't connect if we are shutting down. */
1961 if (server->server_shutdown) {
1962 if (sconn->callback)
1963 (*sconn->callback)(server, NULL, sconn->callback_context);
1964 silc_server_connection_free(sconn);
1968 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1969 (sconn->backup ? "backup router" : "router"),
1970 sconn->remote_host, sconn->remote_port));
1972 if (!sconn->no_conf) {
1973 /* Find connection configuration */
1974 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1975 sconn->remote_port);
1977 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1978 (sconn->backup ? "backup router" : "router"),
1979 sconn->remote_host, sconn->remote_port));
1980 if (sconn->callback)
1981 (*sconn->callback)(server, NULL, sconn->callback_context);
1982 silc_server_connection_free(sconn);
1985 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1988 /* Connect to remote host */
1990 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1991 server->config->server_info->primary->server_ip),
1992 sconn->remote_host, sconn->remote_port,
1993 server->schedule, silc_server_connection_established,
1996 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1997 sconn->remote_host, sconn->remote_port));
1998 if (sconn->callback)
1999 (*sconn->callback)(server, NULL, sconn->callback_context);
2000 silc_server_connection_free(sconn);
2004 /* Add to connection list */
2005 silc_dlist_add(server->conns, sconn);
2008 /* This function connects to our primary router or if we are a router this
2009 establishes all our primary routes. This is called at the start of the
2010 server to do authentication and key exchange with our router - called
2013 SILC_TASK_CALLBACK(silc_server_connect_to_router)
2015 SilcServer server = context;
2016 SilcServerConnection sconn;
2017 SilcServerConfigRouter *ptr;
2018 SilcServerConfigConnParams *param;
2020 /* Don't connect if we are shutting down. */
2021 if (server->server_shutdown)
2024 SILC_LOG_DEBUG(("We are %s",
2025 (server->server_type == SILC_SERVER ?
2026 "normal server" : server->server_type == SILC_ROUTER ?
2027 "router" : "backup router/normal server")));
2029 if (!server->config->routers) {
2030 /* There wasn't a configured router, we will continue but we don't
2031 have a connection to outside world. We will be standalone server. */
2032 SILC_LOG_DEBUG(("No router(s), we are standalone"));
2033 server->standalone = TRUE;
2037 /* Cancel any possible retry timeouts */
2038 silc_schedule_task_del_by_callback(server->schedule,
2039 silc_server_connect_router);
2040 silc_schedule_task_del_by_callback(server->schedule,
2041 silc_server_connect_to_router_retry);
2043 /* Create the connections to all our routes */
2044 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
2046 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
2047 ptr->backup_router ? "Backup router" : "Router",
2048 ptr->initiator ? "Initiator" : "Responder",
2049 ptr->host, ptr->port));
2051 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
2052 ptr->initiator == FALSE && !server->backup_router &&
2053 !silc_server_config_get_backup_router(server))
2054 server->wait_backup = TRUE;
2056 if (!ptr->initiator)
2058 if (ptr->dynamic_connection)
2061 /* Check whether we are connecting or connected to this host already */
2062 if (silc_server_num_sockets_by_remote(server,
2063 silc_net_is_ip(ptr->host) ?
2065 silc_net_is_ip(ptr->host) ?
2066 NULL : ptr->host, ptr->port,
2067 SILC_CONN_ROUTER)) {
2068 SILC_LOG_DEBUG(("We are already connected to %s:%d",
2069 ptr->host, ptr->port));
2071 /* If we don't have primary router and this connection is our
2072 primary router we are in desync. Reconnect to the primary. */
2073 if (server->standalone && !server->router) {
2075 SilcPacketStream sock;
2076 SilcServerConfigRouter *primary =
2077 silc_server_config_get_primary_router(server);
2080 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
2081 ptr->host, ptr->port);
2084 server->backup_noswitch = TRUE;
2085 silc_server_free_sock_user_data(server, sock, NULL);
2086 silc_server_disconnect_remote(server, sock, 0, NULL);
2087 server->backup_noswitch = FALSE;
2088 SILC_LOG_DEBUG(("Reconnecting to primary router"));
2094 param = (ptr->param ? ptr->param : &server->config->param);
2096 /* Allocate connection object for hold connection specific stuff. */
2097 sconn = silc_calloc(1, sizeof(*sconn));
2100 sconn->server = server;
2101 sconn->remote_host = strdup(ptr->host);
2102 sconn->remote_port = ptr->port;
2103 sconn->backup = ptr->backup_router;
2104 if (sconn->backup) {
2105 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2106 sconn->backup_replace_port = ptr->backup_replace_port;
2108 sconn->no_reconnect = param->reconnect_keep_trying == FALSE;
2110 SILC_LOG_DEBUG(("Created connection %p", sconn));
2112 if (!server->router_conn && !sconn->backup)
2113 server->router_conn = sconn;
2116 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2122 /************************ Accepting new connection **************************/
2124 /* After this is called, server don't wait for backup router anymore.
2125 This gets called automatically even after we have backup router
2126 connection established. */
2128 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2130 SilcServer server = context;
2131 server->wait_backup = FALSE;
2134 /* Authentication data callback */
2137 silc_server_accept_get_auth(SilcConnAuth connauth,
2138 SilcConnectionType conn_type,
2139 unsigned char **passphrase,
2140 SilcUInt32 *passphrase_len,
2141 SilcSKR *repository,
2144 SilcPacketStream sock = context;
2145 SilcUnknownEntry entry = silc_packet_get_context(sock);
2146 SilcServer server = entry->server;
2148 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2150 /* Remote end is client */
2151 if (conn_type == SILC_CONN_CLIENT) {
2152 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2156 *passphrase = cconfig->passphrase;
2157 *passphrase_len = cconfig->passphrase_len;
2158 if (cconfig->publickeys)
2159 *repository = server->repository;
2161 if (cconfig->publickeys) {
2162 if (server->config->prefer_passphrase_auth) {
2166 *passphrase_len = 0;
2170 entry->conn_type = conn_type;
2174 /* Remote end is server */
2175 if (conn_type == SILC_CONN_SERVER) {
2176 SilcServerConfigServer *sconfig;
2178 /* If we are normal server, don't accept the connection */
2179 if (server->server_type == SILC_SERVER)
2182 sconfig = entry->sconfig.ref_ptr;
2186 *passphrase = sconfig->passphrase;
2187 *passphrase_len = sconfig->passphrase_len;
2188 if (sconfig->publickeys)
2189 *repository = server->repository;
2191 if (sconfig->publickeys) {
2192 if (server->config->prefer_passphrase_auth) {
2196 *passphrase_len = 0;
2200 entry->conn_type = conn_type;
2204 /* Remote end is router */
2205 if (conn_type == SILC_CONN_ROUTER) {
2206 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2210 *passphrase = rconfig->passphrase;
2211 *passphrase_len = rconfig->passphrase_len;
2212 if (rconfig->publickeys)
2213 *repository = server->repository;
2215 if (rconfig->publickeys) {
2216 if (server->config->prefer_passphrase_auth) {
2220 *passphrase_len = 0;
2224 entry->conn_type = conn_type;
2231 /* Authentication completion callback. */
2234 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2237 SilcPacketStream sock = context;
2238 SilcUnknownEntry entry = silc_packet_get_context(sock);
2239 SilcIDListData idata = (SilcIDListData)entry;
2240 SilcServer server = entry->server;
2241 SilcServerConfigConnParams *param = &server->config->param;
2242 SilcServerConnection sconn;
2244 const char *hostname, *ip;
2248 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2249 NULL, &hostname, &ip, &port);
2251 if (success == FALSE) {
2252 /* Authentication failed */
2253 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2254 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2255 server->stat.auth_failures++;
2256 silc_server_disconnect_remote(server, sock,
2257 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2258 silc_server_config_unref(&entry->cconfig);
2259 silc_server_config_unref(&entry->sconfig);
2260 silc_server_config_unref(&entry->rconfig);
2261 silc_server_free_sock_user_data(server, sock, NULL);
2265 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2267 switch (entry->conn_type) {
2268 case SILC_CONN_CLIENT:
2270 SilcClientEntry client;
2271 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2273 /* Verify whether this connection is after all allowed to connect */
2274 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2275 &server->config->param,
2277 silc_connauth_get_ske(connauth))) {
2278 server->stat.auth_failures++;
2282 /* If we are primary router and we have backup router configured
2283 but it has not connected to use yet, do not accept any other
2285 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2286 !server->backup_router) {
2287 SilcServerConfigRouter *router;
2288 router = silc_server_config_get_backup_router(server);
2289 if (router && strcmp(server->config->server_info->primary->server_ip,
2291 silc_server_find_socket_by_host(server,
2293 router->backup_replace_ip, 0)) {
2294 SILC_LOG_INFO(("Will not accept connections because we do "
2295 "not have backup router connection established"));
2296 silc_server_disconnect_remote(server, sock,
2297 SILC_STATUS_ERR_PERM_DENIED,
2298 "We do not have connection to backup "
2299 "router established, try later");
2300 silc_server_config_unref(&entry->cconfig);
2301 silc_server_config_unref(&entry->sconfig);
2302 silc_server_config_unref(&entry->rconfig);
2303 silc_server_free_sock_user_data(server, sock, NULL);
2304 server->stat.auth_failures++;
2306 /* From here on, wait 20 seconds for the backup router to appear. */
2307 silc_schedule_task_add_timeout(server->schedule,
2308 silc_server_backup_router_wait,
2309 (void *)server, 20, 0);
2314 SILC_LOG_DEBUG(("Remote host is client"));
2315 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2318 /* Add the client to the client ID cache. The nickname and Client ID
2319 and other information is created after we have received NEW_CLIENT
2320 packet from client. */
2321 client = silc_idlist_add_client(server->local_list,
2322 NULL, NULL, NULL, NULL, NULL, sock);
2324 SILC_LOG_ERROR(("Could not add new client to cache"));
2325 server->stat.auth_failures++;
2326 silc_server_disconnect_remote(server, sock,
2327 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2328 silc_server_config_unref(&entry->cconfig);
2329 silc_server_config_unref(&entry->sconfig);
2330 silc_server_config_unref(&entry->rconfig);
2331 silc_server_free_sock_user_data(server, sock, NULL);
2334 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2335 entry->data.conn_type = SILC_CONN_CLIENT;
2338 server->stat.my_clients++;
2339 server->stat.clients++;
2340 server->stat.cell_clients++;
2342 /* Get connection parameters */
2344 param = conn->param;
2346 if (!param->keepalive_secs)
2347 param->keepalive_secs = server->config->param.keepalive_secs;
2349 if (!param->qos && server->config->param.qos) {
2350 param->qos = server->config->param.qos;
2351 param->qos_rate_limit = server->config->param.qos_rate_limit;
2352 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2353 param->qos_limit_sec = server->config->param.qos_limit_sec;
2354 param->qos_limit_usec = server->config->param.qos_limit_usec;
2357 /* Check if to be anonymous connection */
2358 if (param->anonymous)
2359 client->mode |= SILC_UMODE_ANONYMOUS;
2362 /* Add public key to repository */
2363 SILC_LOG_DEBUG(("Add client public key to repository"));
2364 if (!silc_server_get_public_key_by_client(server, client, NULL))
2365 silc_skr_add_public_key_simple(server->repository,
2366 entry->data.public_key,
2367 SILC_SKR_USAGE_IDENTIFICATION, client,
2370 id_entry = (void *)client;
2374 case SILC_CONN_SERVER:
2375 case SILC_CONN_ROUTER:
2377 SilcServerEntry new_server;
2378 SilcBool initiator = FALSE;
2379 SilcBool backup_local = FALSE;
2380 SilcBool backup_router = FALSE;
2381 char *backup_replace_ip = NULL;
2382 SilcUInt16 backup_replace_port = 0;
2383 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2384 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2386 /* If we are backup router and this is incoming server connection
2387 and we do not have connection to primary router, do not allow
2389 if (server->server_type == SILC_BACKUP_ROUTER &&
2390 entry->conn_type == SILC_CONN_SERVER &&
2391 !SILC_PRIMARY_ROUTE(server)) {
2392 SILC_LOG_INFO(("Will not accept server connection because we do "
2393 "not have primary router connection established"));
2394 silc_server_disconnect_remote(server, sock,
2395 SILC_STATUS_ERR_PERM_DENIED,
2396 "We do not have connection to primary "
2397 "router established, try later");
2398 silc_server_config_unref(&entry->cconfig);
2399 silc_server_config_unref(&entry->sconfig);
2400 silc_server_config_unref(&entry->rconfig);
2401 silc_server_free_sock_user_data(server, sock, NULL);
2402 server->stat.auth_failures++;
2406 if (entry->conn_type == SILC_CONN_ROUTER) {
2407 /* Verify whether this connection is after all allowed to connect */
2408 if (!silc_server_connection_allowed(server, sock,
2410 &server->config->param,
2411 rconn ? rconn->param : NULL,
2412 silc_connauth_get_ske(connauth))) {
2413 silc_server_config_unref(&entry->cconfig);
2414 silc_server_config_unref(&entry->sconfig);
2415 silc_server_config_unref(&entry->rconfig);
2416 server->stat.auth_failures++;
2422 param = rconn->param;
2424 if (!param->keepalive_secs)
2425 param->keepalive_secs = server->config->param.keepalive_secs;
2427 if (!param->qos && server->config->param.qos) {
2428 param->qos = server->config->param.qos;
2429 param->qos_rate_limit = server->config->param.qos_rate_limit;
2430 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2431 param->qos_limit_sec = server->config->param.qos_limit_sec;
2432 param->qos_limit_usec = server->config->param.qos_limit_usec;
2436 initiator = rconn->initiator;
2437 backup_local = rconn->backup_local;
2438 backup_router = rconn->backup_router;
2439 backup_replace_ip = rconn->backup_replace_ip;
2440 backup_replace_port = rconn->backup_replace_port;
2444 if (entry->conn_type == SILC_CONN_SERVER) {
2445 /* Verify whether this connection is after all allowed to connect */
2446 if (!silc_server_connection_allowed(server, sock,
2448 &server->config->param,
2449 srvconn ? srvconn->param : NULL,
2450 silc_connauth_get_ske(connauth))) {
2451 server->stat.auth_failures++;
2455 if (srvconn->param) {
2456 param = srvconn->param;
2458 if (!param->keepalive_secs)
2459 param->keepalive_secs = server->config->param.keepalive_secs;
2461 if (!param->qos && server->config->param.qos) {
2462 param->qos = server->config->param.qos;
2463 param->qos_rate_limit = server->config->param.qos_rate_limit;
2464 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2465 param->qos_limit_sec = server->config->param.qos_limit_sec;
2466 param->qos_limit_usec = server->config->param.qos_limit_usec;
2470 backup_router = srvconn->backup_router;
2474 /* If we are primary router and we have backup router configured
2475 but it has not connected to use yet, do not accept any other
2477 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2478 !server->backup_router && !backup_router) {
2479 SilcServerConfigRouter *router;
2480 router = silc_server_config_get_backup_router(server);
2481 if (router && strcmp(server->config->server_info->primary->server_ip,
2483 silc_server_find_socket_by_host(server,
2485 router->backup_replace_ip, 0)) {
2486 SILC_LOG_INFO(("Will not accept connections because we do "
2487 "not have backup router connection established"));
2488 silc_server_disconnect_remote(server, sock,
2489 SILC_STATUS_ERR_PERM_DENIED,
2490 "We do not have connection to backup "
2491 "router established, try later");
2492 silc_server_config_unref(&entry->cconfig);
2493 silc_server_config_unref(&entry->sconfig);
2494 silc_server_config_unref(&entry->rconfig);
2495 silc_server_free_sock_user_data(server, sock, NULL);
2496 server->stat.auth_failures++;
2498 /* From here on, wait 20 seconds for the backup router to appear. */
2499 silc_schedule_task_add_timeout(server->schedule,
2500 silc_server_backup_router_wait,
2501 (void *)server, 20, 0);
2506 SILC_LOG_DEBUG(("Remote host is %s",
2507 entry->conn_type == SILC_CONN_SERVER ?
2508 "server" : (backup_router ?
2509 "backup router" : "router")));
2510 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2511 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2512 "server" : (backup_router ?
2513 "backup router" : "router")));
2515 /* Add the server into server cache. The server name and Server ID
2516 is updated after we have received NEW_SERVER packet from the
2517 server. We mark ourselves as router for this server if we really
2520 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2521 server->local_list : (backup_router ?
2522 server->local_list :
2523 server->global_list)),
2525 (entry->conn_type == SILC_CONN_SERVER ?
2526 SILC_SERVER : SILC_ROUTER),
2528 (entry->conn_type == SILC_CONN_SERVER ?
2529 server->id_entry : (backup_router ?
2530 server->id_entry : NULL)),
2533 SILC_LOG_ERROR(("Could not add new server to cache"));
2534 silc_server_disconnect_remote(server, sock,
2535 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2536 silc_server_config_unref(&entry->cconfig);
2537 silc_server_config_unref(&entry->sconfig);
2538 silc_server_config_unref(&entry->rconfig);
2539 silc_server_free_sock_user_data(server, sock, NULL);
2540 server->stat.auth_failures++;
2543 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2544 entry->data.conn_type = entry->conn_type;
2546 id_entry = (void *)new_server;
2548 /* If the incoming connection is router and marked as backup router
2549 then add it to be one of our backups */
2550 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2551 /* Change it back to SERVER type since that's what it really is. */
2553 entry->data.conn_type = SILC_CONN_SERVER;
2554 new_server->server_type = SILC_BACKUP_ROUTER;
2556 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2557 ("Backup router %s is now online",
2560 /* Remove the backup waiting with timeout */
2561 silc_schedule_task_add_timeout(server->schedule,
2562 silc_server_backup_router_wait,
2563 (void *)server, 10, 0);
2567 if (entry->data.conn_type == SILC_CONN_SERVER) {
2568 server->stat.my_servers++;
2569 server->stat.servers++;
2570 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2572 server->stat.my_routers++;
2573 server->stat.routers++;
2574 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2577 /* Check whether this connection is to be our primary router connection
2578 if we do not already have the primary route. */
2579 if (!backup_router &&
2580 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2581 if (silc_server_config_is_primary_route(server) && !initiator)
2584 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2585 server->standalone = FALSE;
2586 if (!server->id_entry->router) {
2587 server->id_entry->router = id_entry;
2588 server->router = id_entry;
2600 /* Add connection to server->conns so that we know we have connection
2602 sconn = silc_calloc(1, sizeof(*sconn));
2603 sconn->server = server;
2605 sconn->remote_host = strdup(hostname);
2606 sconn->remote_port = port;
2607 silc_dlist_add(server->conns, sconn);
2608 idata->sconn = sconn;
2609 idata->sconn->callback = NULL;
2610 idata->last_receive = time(NULL);
2612 /* Add the common data structure to the ID entry. */
2613 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2614 silc_packet_set_context(sock, id_entry);
2616 /* Connection has been fully established now. Everything is ok. */
2617 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2619 /* Perform Quality of Service */
2621 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2622 param->qos_rate_limit, param->qos_bytes_limit,
2623 param->qos_limit_sec, param->qos_limit_usec);
2625 silc_server_config_unref(&entry->cconfig);
2626 silc_server_config_unref(&entry->sconfig);
2627 silc_server_config_unref(&entry->rconfig);
2631 silc_ske_free(silc_connauth_get_ske(connauth));
2632 silc_connauth_free(connauth);
2635 /* SKE completion callback. We set the new keys into use here. */
2638 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2639 SilcSKESecurityProperties prop,
2640 SilcSKEKeyMaterial keymat,
2641 SilcSKERekeyMaterial rekey,
2644 SilcPacketStream sock = context;
2645 SilcUnknownEntry entry = silc_packet_get_context(sock);
2646 SilcIDListData idata = (SilcIDListData)entry;
2647 SilcServer server = entry->server;
2648 SilcConnAuth connauth;
2649 SilcCipher send_key, receive_key;
2650 SilcHmac hmac_send, hmac_receive;
2657 if (status != SILC_SKE_STATUS_OK) {
2659 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2660 silc_ske_map_status(status), entry->hostname, entry->ip));
2662 silc_server_disconnect_remote(server, sock,
2663 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2664 silc_server_config_unref(&entry->cconfig);
2665 silc_server_config_unref(&entry->sconfig);
2666 silc_server_config_unref(&entry->rconfig);
2667 silc_server_free_sock_user_data(server, sock, NULL);
2671 SILC_LOG_DEBUG(("Setting keys into use"));
2673 /* Set the keys into use. The data will be encrypted after this. */
2674 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2675 &hmac_send, &hmac_receive, &hash)) {
2676 /* Error setting keys */
2678 silc_server_disconnect_remote(server, sock,
2679 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2680 silc_server_free_sock_user_data(server, sock, NULL);
2683 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2684 hmac_receive, FALSE);
2686 idata->rekey = rekey;
2687 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2688 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2690 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2695 SILC_LOG_DEBUG(("Starting connection authentication"));
2696 server->stat.auth_attempts++;
2698 connauth = silc_connauth_alloc(server->schedule, ske,
2699 server->config->conn_auth_timeout);
2701 /** Error allocating auth protocol */
2703 silc_server_disconnect_remote(server, sock,
2704 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2705 silc_server_config_unref(&entry->cconfig);
2706 silc_server_config_unref(&entry->sconfig);
2707 silc_server_config_unref(&entry->rconfig);
2708 silc_server_free_sock_user_data(server, sock, NULL);
2712 /* Start connection authentication */
2714 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2715 silc_server_accept_auth_compl, sock);
2718 /* Accept new TCP connection */
2720 static void silc_server_accept_new_connection(SilcNetStatus status,
2724 SilcServer server = context;
2725 SilcPacketStream packet_stream;
2726 SilcServerConfigClient *cconfig = NULL;
2727 SilcServerConfigServer *sconfig = NULL;
2728 SilcServerConfigRouter *rconfig = NULL;
2729 SilcServerConfigDeny *deny;
2730 SilcUnknownEntry entry;
2732 SilcSKEParamsStruct params;
2733 char *hostname, *ip;
2736 SILC_LOG_DEBUG(("Accepting new connection"));
2738 /* Check for maximum allowed connections */
2739 server->stat.conn_attempts++;
2740 if (silc_dlist_count(server->conns) >
2741 server->config->param.connections_max) {
2742 SILC_LOG_ERROR(("Refusing connection, server is full"));
2743 server->stat.conn_failures++;
2744 silc_stream_destroy(stream);
2748 /* Get hostname, IP and port */
2749 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2750 (const char **)&ip, &port)) {
2751 /* Bad socket stream */
2752 server->stat.conn_failures++;
2753 silc_stream_destroy(stream);
2757 /* Create packet stream */
2758 packet_stream = silc_packet_stream_create(server->packet_engine,
2759 server->schedule, stream);
2760 if (!packet_stream) {
2761 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2762 server->stat.conn_failures++;
2763 silc_stream_destroy(stream);
2766 server->stat.conn_num++;
2768 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2770 /* Set source ID to packet stream */
2771 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2774 server->stat.conn_failures++;
2775 silc_packet_stream_destroy(packet_stream);
2779 /* Check whether this connection is denied to connect to us. */
2780 deny = silc_server_config_find_denied(server, ip);
2782 deny = silc_server_config_find_denied(server, hostname);
2784 /* The connection is denied */
2785 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2786 silc_server_disconnect_remote(server, packet_stream,
2787 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2789 silc_server_free_sock_user_data(server, packet_stream, NULL);
2793 /* Check whether we have configured this sort of connection at all. We
2794 have to check all configurations since we don't know what type of
2795 connection this is. */
2796 if (!(cconfig = silc_server_config_find_client(server, ip)))
2797 cconfig = silc_server_config_find_client(server, hostname);
2798 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2799 sconfig = silc_server_config_find_server_conn(server, hostname);
2800 if (server->server_type == SILC_ROUTER)
2801 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2802 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2803 if (!cconfig && !sconfig && !rconfig) {
2804 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2805 server->stat.conn_failures++;
2806 silc_server_disconnect_remote(server, packet_stream,
2807 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2808 silc_server_free_sock_user_data(server, packet_stream, NULL);
2812 /* The connection is allowed */
2813 entry = silc_calloc(1, sizeof(*entry));
2815 server->stat.conn_failures++;
2816 silc_server_disconnect_remote(server, packet_stream,
2817 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2818 silc_server_free_sock_user_data(server, packet_stream, NULL);
2821 entry->hostname = hostname;
2824 entry->server = server;
2825 entry->data.conn_type = SILC_CONN_UNKNOWN;
2826 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2827 silc_packet_set_context(packet_stream, entry);
2829 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2831 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2832 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2833 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2835 /* Take flags for key exchange. Since we do not know what type of connection
2836 this is, we go through all found configurations and use the global ones
2837 as well. This will result always into strictest key exchange flags. */
2838 memset(¶ms, 0, sizeof(params));
2839 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2840 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2841 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2842 if (server->config->param.key_exchange_pfs)
2843 params.flags |= SILC_SKE_SP_FLAG_PFS;
2845 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2846 server->stat.conn_attempts++;
2848 /* Start SILC Key Exchange protocol */
2849 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2850 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2851 server->public_key, server->private_key,
2854 server->stat.conn_failures++;
2855 silc_server_disconnect_remote(server, packet_stream,
2856 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2857 silc_server_free_sock_user_data(server, packet_stream, NULL);
2860 silc_ske_set_callbacks(ske, silc_server_verify_key,
2861 silc_server_accept_completed, packet_stream);
2863 /* Start key exchange protocol */
2864 params.version = silc_version_string;
2865 params.timeout_secs = server->config->key_exchange_timeout;
2866 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2870 /********************************** Rekey ***********************************/
2872 /* Initiator rekey completion callback */
2874 static void silc_server_rekey_completion(SilcSKE ske,
2875 SilcSKEStatus status,
2876 const SilcSKESecurityProperties prop,
2877 const SilcSKEKeyMaterial keymat,
2878 SilcSKERekeyMaterial rekey,
2881 SilcPacketStream sock = context;
2882 SilcIDListData idata = silc_packet_get_context(sock);
2883 SilcServer server = idata->sconn->server;
2885 idata->sconn->op = NULL;
2886 if (status != SILC_SKE_STATUS_OK) {
2887 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2888 idata->sconn->remote_host));
2892 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2893 idata->sconn->remote_host, idata->sconn->remote_port,
2894 SILC_CONNTYPE_STRING(idata->conn_type)));
2896 /* Save rekey data for next rekey */
2897 idata->rekey = rekey;
2899 /* Register new rekey timeout */
2900 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2901 sock, idata->sconn->rekey_timeout, 0);
2904 /* Rekey callback. Start rekey as initiator */
2906 SILC_TASK_CALLBACK(silc_server_do_rekey)
2908 SilcServer server = app_context;
2909 SilcPacketStream sock = context;
2910 SilcIDListData idata = silc_packet_get_context(sock);
2913 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2915 /* Do not execute rekey with disabled connections */
2916 if (idata->status & SILC_IDLIST_STATUS_DISABLED || !idata->rekey)
2919 /* If another protocol is active do not start rekey */
2920 if (idata->sconn->op) {
2921 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2922 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2927 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2928 idata->sconn->remote_host, idata->sconn->remote_port,
2929 SILC_CONNTYPE_STRING(idata->conn_type)));
2932 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2933 server->public_key, NULL, sock);
2937 /* Set SKE callbacks */
2938 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2941 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2944 /* Responder rekey completion callback */
2947 silc_server_rekey_resp_completion(SilcSKE ske,
2948 SilcSKEStatus status,
2949 const SilcSKESecurityProperties prop,
2950 const SilcSKEKeyMaterial keymat,
2951 SilcSKERekeyMaterial rekey,
2954 SilcPacketStream sock = context;
2955 SilcIDListData idata = silc_packet_get_context(sock);
2957 idata->sconn->op = NULL;
2958 if (status != SILC_SKE_STATUS_OK) {
2959 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2960 idata->sconn->remote_host));
2964 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2965 idata->sconn->remote_host, idata->sconn->remote_port,
2966 SILC_CONNTYPE_STRING(idata->conn_type)));
2968 /* Save rekey data for next rekey */
2969 idata->rekey = rekey;
2972 /* Start rekey as responder */
2974 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2977 SilcIDListData idata = silc_packet_get_context(sock);
2980 if (!idata->rekey) {
2981 silc_packet_free(packet);
2985 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2986 idata->sconn->remote_host, idata->sconn->remote_port,
2987 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2990 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2991 server->public_key, NULL, sock);
2993 silc_packet_free(packet);
2997 /* Set SKE callbacks */
2998 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
3001 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
3006 /****************************** Disconnection *******************************/
3008 /* Destroys packet stream. */
3010 SILC_TASK_CALLBACK(silc_server_close_connection_final)
3012 silc_packet_stream_unref(context);
3015 /* Closes connection to socket connection */
3017 void silc_server_close_connection(SilcServer server,
3018 SilcPacketStream sock)
3020 SilcIDListData idata = silc_packet_get_context(sock);
3022 const char *hostname;
3025 if (!silc_packet_stream_is_valid(sock))
3028 memset(tmp, 0, sizeof(tmp));
3029 // silc_socket_get_error(sock, tmp, sizeof(tmp));
3030 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3031 NULL, &hostname, NULL, &port);
3032 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
3033 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
3034 tmp[0] ? tmp : ""));
3036 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
3038 if (idata && idata->sconn) {
3039 silc_server_connection_free(idata->sconn);
3040 idata->sconn = NULL;
3043 /* Take a reference and then destroy the stream. The last reference
3044 is released later in a timeout callback. */
3045 silc_packet_stream_ref(sock);
3046 silc_packet_stream_destroy(sock);
3048 /* Close connection with timeout */
3049 server->stat.conn_num--;
3050 silc_schedule_task_del_by_all(server->schedule, 0,
3051 silc_server_close_connection_final, sock);
3052 silc_schedule_task_add_timeout(server->schedule,
3053 silc_server_close_connection_final,
3057 /* Sends disconnect message to remote connection and disconnects the
3060 void silc_server_disconnect_remote(SilcServer server,
3061 SilcPacketStream sock,
3062 SilcStatus status, ...)
3064 unsigned char buf[512];
3071 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
3073 va_start(ap, status);
3074 cp = va_arg(ap, char *);
3076 silc_vsnprintf(buf, sizeof(buf), cp, ap);
3079 /* Send SILC_PACKET_DISCONNECT */
3080 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
3081 SILC_STR_UI_CHAR(status),
3082 SILC_STR_UI8_STRING(cp ? buf : NULL),
3085 /* Close connection */
3086 silc_server_close_connection(server, sock);
3089 /* Frees client data and notifies about client's signoff. */
3091 void silc_server_free_client_data(SilcServer server,
3092 SilcPacketStream sock,
3093 SilcClientEntry client,
3095 const char *signoff)
3097 SILC_LOG_DEBUG(("Freeing client %p data", client));
3100 /* Check if anyone is watching this nickname */
3101 if (server->server_type == SILC_ROUTER)
3102 silc_server_check_watcher_list(server, client, NULL,
3103 SILC_NOTIFY_TYPE_SIGNOFF);
3105 /* Send SIGNOFF notify to routers. */
3107 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
3108 SILC_BROADCAST(server), client->id,
3112 /* Remove client from all channels */
3114 silc_server_remove_from_channels(server, NULL, client,
3115 TRUE, (char *)signoff, TRUE, FALSE);
3117 silc_server_remove_from_channels(server, NULL, client,
3118 FALSE, NULL, FALSE, FALSE);
3120 /* Remove this client from watcher list if it is */
3121 silc_server_del_from_watcher_list(server, client);
3123 /* Remove client's public key from repository, this will free it too. */
3124 if (client->data.public_key) {
3125 silc_skr_del_public_key(server->repository, client->data.public_key,
3127 client->data.public_key = NULL;
3130 /* Update statistics */
3131 server->stat.my_clients--;
3132 server->stat.clients--;
3133 if (server->stat.cell_clients)
3134 server->stat.cell_clients--;
3135 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3136 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3137 silc_schedule_task_del_by_context(server->schedule, client);
3139 if (client->data.sconn) {
3140 silc_server_connection_free(client->data.sconn);
3141 client->data.sconn = NULL;
3144 /* We will not delete the client entry right away. We will take it
3145 into history (for WHOWAS command) for 5 minutes, unless we're
3146 shutting down server. */
3147 if (!server->server_shutdown) {
3148 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3150 client->router = NULL;
3151 client->connection = NULL;
3152 client->data.created = silc_time();
3153 silc_dlist_del(server->expired_clients, client);
3154 silc_dlist_add(server->expired_clients, client);
3156 /* Delete directly since we're shutting down server */
3157 SILC_LOG_DEBUG(("Delete client directly"));
3158 silc_idlist_del_data(client);
3159 silc_idlist_del_client(server->local_list, client);
3163 /* Frees user_data pointer from socket connection object. This also sends
3164 appropriate notify packets to the network to inform about leaving
3167 void silc_server_free_sock_user_data(SilcServer server,
3168 SilcPacketStream sock,
3169 const char *signoff_message)
3171 SilcIDListData idata;
3178 SILC_LOG_DEBUG(("Start, sock %p", sock));
3180 idata = silc_packet_get_context(sock);
3184 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3187 /* Cancel active protocols */
3189 if (idata->sconn && idata->sconn->op) {
3190 SILC_LOG_DEBUG(("Abort active protocol"));
3191 silc_async_abort(idata->sconn->op, NULL, NULL);
3193 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3194 ((SilcUnknownEntry)idata)->op) {
3195 SILC_LOG_DEBUG(("Abort active protocol"));
3196 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3200 switch (idata->conn_type) {
3201 case SILC_CONN_CLIENT:
3203 SilcClientEntry client_entry = (SilcClientEntry)idata;
3204 silc_server_free_client_data(server, sock, client_entry, TRUE,
3206 silc_packet_set_context(sock, NULL);
3210 case SILC_CONN_SERVER:
3211 case SILC_CONN_ROUTER:
3213 SilcServerEntry user_data = (SilcServerEntry)idata;
3214 SilcServerEntry backup_router = NULL;
3216 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3219 backup_router = silc_server_backup_get(server, user_data->id);
3221 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3222 backup_router == server->id_entry &&
3223 idata->conn_type != SILC_CONN_ROUTER)
3224 backup_router = NULL;
3226 if (server->server_shutdown || server->backup_noswitch)
3227 backup_router = NULL;
3229 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3230 NULL, NULL, &ip, &port);
3232 /* If this was our primary router connection then we're lost to
3233 the outside world. */
3234 if (server->router == user_data) {
3235 /* Check whether we have a backup router connection */
3236 if (!backup_router || backup_router == user_data) {
3237 if (!server->no_reconnect)
3238 silc_server_create_connections(server);
3239 server->id_entry->router = NULL;
3240 server->router = NULL;
3241 server->standalone = TRUE;
3242 server->backup_primary = FALSE;
3243 backup_router = NULL;
3245 if (server->id_entry != backup_router) {
3246 SILC_LOG_INFO(("New primary router is backup router %s",
3247 backup_router->server_name));
3248 server->id_entry->router = backup_router;
3249 server->router = backup_router;
3250 server->router_connect = time(0);
3251 server->backup_primary = TRUE;
3252 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3254 /* Send START_USE to backup router to indicate we have switched */
3255 silc_server_backup_send_start_use(server,
3256 backup_router->connection,
3259 SILC_LOG_INFO(("We are now new primary router in this cell"));
3260 server->id_entry->router = NULL;
3261 server->router = NULL;
3262 server->standalone = TRUE;
3265 /* We stop here to take a breath */
3268 if (server->backup_router) {
3269 server->server_type = SILC_ROUTER;
3271 /* We'll need to constantly try to reconnect to the primary
3272 router so that we'll see when it comes back online. */
3273 silc_server_create_connection(server, TRUE, FALSE, ip, port,
3274 silc_server_backup_connected,
3278 /* Mark this connection as replaced */
3279 silc_server_backup_replaced_add(server, user_data->id,
3282 } else if (backup_router) {
3283 SILC_LOG_INFO(("Enabling the use of backup router %s",
3284 backup_router->server_name));
3286 /* Mark this connection as replaced */
3287 silc_server_backup_replaced_add(server, user_data->id,
3289 } else if (server->server_type == SILC_SERVER &&
3290 idata->conn_type == SILC_CONN_ROUTER) {
3291 /* Reconnect to the router (backup) */
3292 if (!server->no_reconnect)
3293 silc_server_create_connections(server);
3296 if (user_data->server_name)
3297 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3298 ("Server %s signoff", user_data->server_name));
3300 if (!backup_router) {
3301 /* Remove all servers that are originated from this server, and
3302 remove the clients of those servers too. */
3303 silc_server_remove_servers_by_server(server, user_data, TRUE);
3306 /* Remove the clients that this server owns as they will become
3307 invalid now too. For backup router the server is actually
3308 coming from the primary router, so mark that as the owner
3310 if (server->server_type == SILC_BACKUP_ROUTER &&
3311 sock->type == SILC_CONN_SERVER)
3312 silc_server_remove_clients_by_server(server, server->router,
3316 silc_server_remove_clients_by_server(server, user_data,
3319 /* Remove channels owned by this server */
3320 if (server->server_type == SILC_SERVER)
3321 silc_server_remove_channels_by_server(server, user_data);
3323 /* Enable local server connections that may be disabled */
3324 silc_server_local_servers_toggle_enabled(server, TRUE);
3326 /* Update the client entries of this server to the new backup
3327 router. If we are the backup router we also resolve the real
3328 servers for the clients. After updating is over this also
3329 removes the clients that this server explicitly owns. */
3330 silc_server_update_clients_by_server(server, user_data,
3331 backup_router, TRUE);
3333 /* If we are router and just lost our primary router (now standlaone)
3334 we remove everything that was behind it, since we don't know
3336 if (server->server_type == SILC_ROUTER && server->standalone)
3337 /* Remove all servers that are originated from this server, and
3338 remove the clients of those servers too. */
3339 silc_server_remove_servers_by_server(server, user_data, TRUE);
3341 /* Finally remove the clients that are explicitly owned by this
3342 server. They go down with the server. */
3343 silc_server_remove_clients_by_server(server, user_data,
3346 /* Update our server cache to use the new backup router too. */
3347 silc_server_update_servers_by_server(server, user_data, backup_router);
3348 if (server->server_type == SILC_SERVER)
3349 silc_server_update_channels_by_server(server, user_data,
3352 /* Send notify about primary router going down to local operators */
3353 if (server->backup_router)
3354 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3355 SILC_NOTIFY_TYPE_NONE,
3356 ("%s switched to backup router %s "
3357 "(we are primary router now)",
3358 server->server_name, server->server_name));
3359 else if (server->router)
3360 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3361 SILC_NOTIFY_TYPE_NONE,
3362 ("%s switched to backup router %s",
3363 server->server_name,
3364 server->router->server_name));
3366 server->backup_noswitch = FALSE;
3369 silc_server_connection_free(idata->sconn);
3370 idata->sconn = NULL;
3374 if (idata->conn_type == SILC_CONN_SERVER) {
3375 server->stat.my_servers--;
3376 server->stat.servers--;
3377 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3378 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3379 server->stat.my_routers--;
3380 server->stat.routers--;
3381 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3383 if (server->server_type == SILC_ROUTER)
3384 server->stat.cell_servers--;
3386 /* Free the server entry */
3387 silc_server_backup_del(server, user_data);
3388 silc_server_backup_replaced_del(server, user_data);
3389 silc_idlist_del_data(user_data);
3390 if (!silc_idlist_del_server(server->local_list, user_data))
3391 silc_idlist_del_server(server->global_list, user_data);
3393 if (backup_router && backup_router != server->id_entry) {
3394 /* Announce all of our stuff that was created about 5 minutes ago.
3395 The backup router knows all the other stuff already. */
3396 if (server->server_type == SILC_ROUTER)
3397 silc_server_announce_servers(server, FALSE, time(0) - 300,
3398 backup_router->connection);
3400 /* Announce our clients and channels to the router */
3401 silc_server_announce_clients(server, time(0) - 300,
3402 backup_router->connection);
3403 silc_server_announce_channels(server, time(0) - 300,
3404 backup_router->connection);
3407 silc_packet_set_context(sock, NULL);
3413 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3415 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3418 if (server->router_conn == idata->sconn) {
3419 if (!server->no_reconnect)
3420 silc_server_create_connections(server);
3421 server->router_conn = NULL;
3424 silc_server_connection_free(idata->sconn);
3425 idata->sconn = NULL;
3427 silc_idlist_del_data(idata);
3429 silc_packet_set_context(sock, NULL);
3435 /* Removes client from all channels it has joined. This is used when client
3436 connection is disconnected. If the client on a channel is last, the
3437 channel is removed as well. This sends the SIGNOFF notify types. */
3439 void silc_server_remove_from_channels(SilcServer server,
3440 SilcPacketStream sock,
3441 SilcClientEntry client,
3443 const char *signoff_message,
3447 SilcChannelEntry channel;
3448 SilcChannelClientEntry chl;
3449 SilcHashTableList htl;
3450 SilcBuffer clidp = NULL;
3455 if (notify && !client->id)
3458 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3459 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3462 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3467 /* Remove the client from all channels. The client is removed from
3468 the channels' user list. */
3469 silc_hash_table_list(client->channels, &htl);
3470 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3471 channel = chl->channel;
3473 /* Remove channel if this is last client leaving the channel, unless
3474 the channel is permanent. */
3475 if (server->server_type != SILC_SERVER &&
3476 silc_hash_table_count(channel->user_list) < 2) {
3477 silc_server_channel_delete(server, channel);
3481 silc_hash_table_del(client->channels, channel);
3482 silc_hash_table_del(channel->user_list, client);
3483 channel->user_count--;
3485 /* If there is no global users on the channel anymore mark the channel
3486 as local channel. Do not check if the removed client is local client. */
3487 if (server->server_type == SILC_SERVER && channel->global_users &&
3488 chl->client->router && !silc_server_channel_has_global(channel))
3489 channel->global_users = FALSE;
3491 memset(chl, 'A', sizeof(*chl));
3494 /* Update statistics */
3495 if (SILC_IS_LOCAL(client))
3496 server->stat.my_chanclients--;
3497 if (server->server_type == SILC_ROUTER) {
3498 server->stat.cell_chanclients--;
3499 server->stat.chanclients--;
3502 /* If there is not at least one local user on the channel then we don't
3503 need the channel entry anymore, we can remove it safely, unless the
3504 channel is permanent channel */
3505 if (server->server_type == SILC_SERVER &&
3506 !silc_server_channel_has_local(channel)) {
3507 /* Notify about leaving client if this channel has global users. */
3508 if (notify && channel->global_users)
3509 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3510 SILC_NOTIFY_TYPE_SIGNOFF,
3511 signoff_message ? 2 : 1,
3512 clidp->data, silc_buffer_len(clidp),
3513 signoff_message, signoff_message ?
3514 strlen(signoff_message) : 0);
3516 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3517 silc_server_channel_delete(server, channel);
3521 /* Send notify to channel about client leaving SILC and channel too */
3523 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3524 SILC_NOTIFY_TYPE_SIGNOFF,
3525 signoff_message ? 2 : 1,
3526 clidp->data, silc_buffer_len(clidp),
3527 signoff_message, signoff_message ?
3528 strlen(signoff_message) : 0);
3530 if (killed && clidp) {
3531 /* Remove the client from channel's invite list */
3532 if (channel->invite_list &&
3533 silc_hash_table_count(channel->invite_list)) {
3535 SilcArgumentPayload iargs;
3536 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3537 silc_buffer_len(clidp), 3);
3538 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3539 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3540 silc_buffer_free(ab);
3541 silc_argument_payload_free(iargs);
3545 /* Don't create keys if we are shutting down */
3546 if (server->server_shutdown)
3549 /* Re-generate channel key if needed */
3550 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3551 if (!silc_server_create_channel_key(server, channel, 0))
3554 /* Send the channel key to the channel. The key of course is not sent
3555 to the client who was removed from the channel. */
3556 silc_server_send_channel_key(server, client->connection, channel,
3557 server->server_type == SILC_ROUTER ?
3558 FALSE : !server->standalone);
3562 silc_hash_table_list_reset(&htl);
3564 silc_buffer_free(clidp);
3567 /* Removes client from one channel. This is used for example when client
3568 calls LEAVE command to remove itself from the channel. Returns TRUE
3569 if channel still exists and FALSE if the channel is removed when
3570 last client leaves the channel. If `notify' is FALSE notify messages
3573 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3574 SilcPacketStream sock,
3575 SilcChannelEntry channel,
3576 SilcClientEntry client,
3579 SilcChannelClientEntry chl;
3582 SILC_LOG_DEBUG(("Removing %s from channel %s",
3583 silc_id_render(client->id, SILC_ID_CLIENT),
3584 channel->channel_name));
3586 /* Get the entry to the channel, if this client is not on the channel
3588 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3591 /* Remove channel if this is last client leaving the channel, unless
3592 the channel is permanent. */
3593 if (server->server_type != SILC_SERVER &&
3594 silc_hash_table_count(channel->user_list) < 2) {
3595 silc_server_channel_delete(server, channel);
3599 silc_hash_table_del(client->channels, channel);
3600 silc_hash_table_del(channel->user_list, client);
3601 channel->user_count--;
3603 /* If there is no global users on the channel anymore mark the channel
3604 as local channel. Do not check if the client is local client. */
3605 if (server->server_type == SILC_SERVER && channel->global_users &&
3606 chl->client->router && !silc_server_channel_has_global(channel))
3607 channel->global_users = FALSE;
3609 memset(chl, 'O', sizeof(*chl));
3612 /* Update statistics */
3613 if (SILC_IS_LOCAL(client))
3614 server->stat.my_chanclients--;
3615 if (server->server_type == SILC_ROUTER) {
3616 server->stat.cell_chanclients--;
3617 server->stat.chanclients--;
3620 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3624 /* If there is not at least one local user on the channel then we don't
3625 need the channel entry anymore, we can remove it safely, unless the
3626 channel is permanent channel */
3627 if (server->server_type == SILC_SERVER &&
3628 !silc_server_channel_has_local(channel)) {
3629 /* Notify about leaving client if this channel has global users. */
3630 if (notify && channel->global_users)
3631 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3632 SILC_NOTIFY_TYPE_LEAVE, 1,
3633 clidp->data, silc_buffer_len(clidp));
3635 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3636 silc_server_channel_delete(server, channel);
3637 silc_buffer_free(clidp);
3641 /* Send notify to channel about client leaving the channel */
3643 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3644 SILC_NOTIFY_TYPE_LEAVE, 1,
3645 clidp->data, silc_buffer_len(clidp));
3647 silc_buffer_free(clidp);
3651 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3652 function may be used only by router. In real SILC network all channels
3653 are created by routers thus this function is never used by normal
3656 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3657 SilcServerID *router_id,
3663 SilcChannelID *channel_id;
3664 SilcChannelEntry entry;
3665 SilcCipher send_key, receive_key;
3668 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3671 cipher = SILC_DEFAULT_CIPHER;
3673 hmac = SILC_DEFAULT_HMAC;
3675 /* Allocate cipher */
3676 if (!silc_cipher_alloc(cipher, &send_key))
3678 if (!silc_cipher_alloc(cipher, &receive_key)) {
3679 silc_cipher_free(send_key);
3684 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3685 silc_cipher_free(send_key);
3686 silc_cipher_free(receive_key);
3690 channel_name = strdup(channel_name);
3692 /* Create the channel ID */
3693 if (!silc_id_create_channel_id(server, router_id, server->rng,
3695 silc_free(channel_name);
3696 silc_cipher_free(send_key);
3697 silc_cipher_free(receive_key);
3698 silc_hmac_free(newhmac);
3702 /* Create the channel */
3703 entry = silc_idlist_add_channel(server->local_list, channel_name,
3704 SILC_CHANNEL_MODE_NONE, channel_id,
3705 NULL, send_key, receive_key, newhmac);
3707 silc_free(channel_name);
3708 silc_cipher_free(send_key);
3709 silc_cipher_free(receive_key);
3710 silc_hmac_free(newhmac);
3711 silc_free(channel_id);
3715 entry->cipher = strdup(cipher);
3716 entry->hmac_name = strdup(hmac);
3718 /* Now create the actual key material */
3719 if (!silc_server_create_channel_key(server, entry,
3720 silc_cipher_get_key_len(send_key) / 8)) {
3721 silc_idlist_del_channel(server->local_list, entry);
3725 /* Notify other routers about the new channel. We send the packet
3726 to our primary route. */
3728 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3729 channel_name, entry->id,
3730 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3733 /* Distribute to backup routers */
3734 if (broadcast && server->server_type == SILC_ROUTER) {
3736 unsigned char cid[32];
3737 SilcUInt32 name_len = strlen(channel_name);
3740 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3741 packet = silc_channel_payload_encode(channel_name, name_len,
3742 cid, id_len, entry->mode);
3743 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3744 packet->data, silc_buffer_len(packet), FALSE,
3746 silc_buffer_free(packet);
3749 server->stat.my_channels++;
3750 if (server->server_type == SILC_ROUTER) {
3751 server->stat.channels++;
3752 server->stat.cell_channels++;
3753 entry->users_resolved = TRUE;
3759 /* Same as above but creates the channel with Channel ID `channel_id. */
3762 silc_server_create_new_channel_with_id(SilcServer server,
3766 SilcChannelID *channel_id,
3769 SilcChannelEntry entry;
3770 SilcCipher send_key, receive_key;
3773 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3776 cipher = SILC_DEFAULT_CIPHER;
3778 hmac = SILC_DEFAULT_HMAC;
3780 /* Allocate cipher */
3781 if (!silc_cipher_alloc(cipher, &send_key))
3783 if (!silc_cipher_alloc(cipher, &receive_key)) {
3784 silc_cipher_free(send_key);
3789 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3790 silc_cipher_free(send_key);
3791 silc_cipher_free(receive_key);
3795 channel_name = strdup(channel_name);
3797 /* Create the channel */
3798 entry = silc_idlist_add_channel(server->local_list, channel_name,
3799 SILC_CHANNEL_MODE_NONE, channel_id,
3800 NULL, send_key, receive_key, newhmac);
3802 silc_cipher_free(send_key);
3803 silc_cipher_free(receive_key);
3804 silc_hmac_free(newhmac);
3805 silc_free(channel_name);
3809 /* Now create the actual key material */
3810 if (!silc_server_create_channel_key(server, entry,
3811 silc_cipher_get_key_len(send_key) / 8)) {
3812 silc_idlist_del_channel(server->local_list, entry);
3816 /* Notify other routers about the new channel. We send the packet
3817 to our primary route. */
3819 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3820 channel_name, entry->id,
3821 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3824 /* Distribute to backup routers */
3825 if (broadcast && server->server_type == SILC_ROUTER) {
3827 unsigned char cid[32];
3828 SilcUInt32 name_len = strlen(channel_name);
3831 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3832 packet = silc_channel_payload_encode(channel_name, name_len,
3833 cid, id_len, entry->mode);
3834 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3835 packet->data, silc_buffer_len(packet), FALSE,
3837 silc_buffer_free(packet);
3840 server->stat.my_channels++;
3841 if (server->server_type == SILC_ROUTER) {
3842 server->stat.channels++;
3843 server->stat.cell_channels++;
3844 entry->users_resolved = TRUE;
3850 /* Channel's key re-key timeout callback. */
3852 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3854 SilcServer server = app_context;
3855 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3859 /* Return now if we are shutting down */
3860 if (server->server_shutdown)
3863 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3866 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3869 /* Generates new channel key. This is used to create the initial channel key
3870 but also to re-generate new key for channel. If `key_len' is provided
3871 it is the bytes of the key length. */
3873 SilcBool silc_server_create_channel_key(SilcServer server,
3874 SilcChannelEntry channel,
3878 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3881 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3882 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3886 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3888 if (!channel->send_key)
3889 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3890 channel->send_key = NULL;
3893 if (!channel->receive_key)
3894 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3895 silc_cipher_free(channel->send_key);
3896 channel->send_key = channel->receive_key = NULL;
3902 else if (channel->key_len)
3903 len = channel->key_len / 8;
3905 len = silc_cipher_get_key_len(channel->send_key) / 8;
3907 /* Create channel key */
3908 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3911 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3912 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3914 /* Remove old key if exists */
3916 memset(channel->key, 0, channel->key_len / 8);
3917 silc_free(channel->key);
3921 channel->key_len = len * 8;
3922 channel->key = silc_memdup(channel_key, len);
3923 memset(channel_key, 0, sizeof(channel_key));
3925 /* Generate HMAC key from the channel key data and set it */
3927 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3928 memset(channel->key, 0, channel->key_len / 8);
3929 silc_free(channel->key);
3930 silc_cipher_free(channel->send_key);
3931 silc_cipher_free(channel->receive_key);
3932 channel->send_key = channel->receive_key = NULL;
3935 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3936 silc_hmac_set_key(channel->hmac, hash,
3937 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3938 memset(hash, 0, sizeof(hash));
3940 if (server->server_type == SILC_ROUTER) {
3941 if (!channel->rekey)
3942 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3943 channel->rekey->channel = channel;
3944 channel->rekey->key_len = key_len;
3945 if (channel->rekey->task)
3946 silc_schedule_task_del(server->schedule, channel->rekey->task);
3948 channel->rekey->task =
3949 silc_schedule_task_add_timeout(server->schedule,
3950 silc_server_channel_key_rekey,
3951 (void *)channel->rekey,
3952 server->config->channel_rekey_secs, 0);
3958 /* Saves the channel key found in the encoded `key_payload' buffer. This
3959 function is used when we receive Channel Key Payload and also when we're
3960 processing JOIN command reply. Returns entry to the channel. */
3962 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3963 SilcBuffer key_payload,
3964 SilcChannelEntry channel)
3966 SilcChannelKeyPayload payload = NULL;
3968 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3972 /* Decode channel key payload */
3973 payload = silc_channel_key_payload_parse(key_payload->data,
3974 silc_buffer_len(key_payload));
3976 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3981 /* Get the channel entry */
3984 /* Get channel ID */
3985 tmp = silc_channel_key_get_id(payload, &tmp_len);
3986 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3991 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3993 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3995 if (server->server_type == SILC_ROUTER)
3996 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3997 silc_id_render(&id, SILC_ID_CHANNEL)));
4003 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
4005 tmp = silc_channel_key_get_key(payload, &tmp_len);
4011 cipher = silc_channel_key_get_cipher(payload, NULL);
4017 /* Remove old key if exists */
4019 memset(channel->key, 0, channel->key_len / 8);
4020 silc_free(channel->key);
4021 silc_cipher_free(channel->send_key);
4022 silc_cipher_free(channel->receive_key);
4025 /* Create new cipher */
4026 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
4027 channel->send_key = NULL;
4031 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
4032 silc_cipher_free(channel->send_key);
4033 channel->send_key = channel->receive_key = NULL;
4038 if (channel->cipher)
4039 silc_free(channel->cipher);
4040 channel->cipher = strdup(cipher);
4043 channel->key_len = tmp_len * 8;
4044 channel->key = silc_memdup(tmp, tmp_len);
4045 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
4046 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
4048 /* Generate HMAC key from the channel key data and set it */
4050 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
4051 memset(channel->key, 0, channel->key_len / 8);
4052 silc_free(channel->key);
4053 silc_cipher_free(channel->send_key);
4054 silc_cipher_free(channel->receive_key);
4055 channel->send_key = channel->receive_key = NULL;
4058 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
4059 silc_hmac_set_key(channel->hmac, hash,
4060 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
4062 memset(hash, 0, sizeof(hash));
4063 memset(tmp, 0, tmp_len);
4065 if (server->server_type == SILC_ROUTER) {
4066 if (!channel->rekey)
4067 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
4068 channel->rekey->channel = channel;
4069 if (channel->rekey->task)
4070 silc_schedule_task_del(server->schedule, channel->rekey->task);
4072 channel->rekey->task =
4073 silc_schedule_task_add_timeout(server->schedule,
4074 silc_server_channel_key_rekey,
4075 (void *)channel->rekey,
4076 server->config->channel_rekey_secs, 0);
4081 silc_channel_key_payload_free(payload);
4086 /* Returns assembled of all servers in the given ID list. The packet's
4087 form is dictated by the New ID payload. */
4089 static void silc_server_announce_get_servers(SilcServer server,
4090 SilcServerEntry remote,
4092 SilcBuffer *servers,
4093 unsigned long creation_time)
4096 SilcIDCacheEntry id_cache;
4097 SilcServerEntry entry;
4101 /* Go through all clients in the list */
4102 if (silc_idcache_get_all(id_list->servers, &list)) {
4103 silc_list_start(list);
4104 while ((id_cache = silc_list_get(list))) {
4105 entry = (SilcServerEntry)id_cache->context;
4107 /* Do not announce the one we've sending our announcements and
4108 do not announce ourself. Also check the creation time if it's
4110 if ((entry == remote) || (entry == server->id_entry) ||
4111 (creation_time && entry->data.created < creation_time))
4114 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4116 tmp = silc_buffer_realloc(*servers,
4118 silc_buffer_truelen((*servers)) +
4119 silc_buffer_len(idp) :
4120 silc_buffer_len(idp)));
4124 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4125 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4126 silc_buffer_pull(*servers, silc_buffer_len(idp));
4127 silc_buffer_free(idp);
4133 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4139 p = silc_notify_payload_encode(notify, argc, ap);
4145 /* This function is used by router to announce existing servers to our
4146 primary router when we've connected to it. If `creation_time' is non-zero
4147 then only the servers that has been created after the `creation_time'
4148 will be announced. */
4150 void silc_server_announce_servers(SilcServer server, SilcBool global,
4151 unsigned long creation_time,
4152 SilcPacketStream remote)
4154 SilcBuffer servers = NULL;
4156 SILC_LOG_DEBUG(("Announcing servers"));
4158 /* Get servers in local list */
4159 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4160 server->local_list, &servers,
4164 /* Get servers in global list */
4165 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4166 server->global_list, &servers,
4170 silc_buffer_push(servers, servers->data - servers->head);
4171 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4173 /* Send the packet */
4174 silc_server_packet_send(server, remote,
4175 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4176 servers->data, silc_buffer_len(servers));
4178 silc_buffer_free(servers);
4182 /* Returns assembled packet of all clients in the given ID list. The
4183 packet's form is dictated by the New ID Payload. */
4185 static void silc_server_announce_get_clients(SilcServer server,
4187 SilcBuffer *clients,
4189 unsigned long creation_time)
4192 SilcIDCacheEntry id_cache;
4193 SilcClientEntry client;
4196 unsigned char mode[4];
4199 /* Go through all clients in the list */
4200 if (silc_idcache_get_all(id_list->clients, &list)) {
4201 silc_list_start(list);
4202 while ((id_cache = silc_list_get(list))) {
4203 client = (SilcClientEntry)id_cache->context;
4205 if (creation_time && client->data.created < creation_time)
4207 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4209 if (!client->connection && !client->router)
4212 SILC_LOG_DEBUG(("Announce Client ID %s",
4213 silc_id_render(client->id, SILC_ID_CLIENT)));
4215 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4219 tmp2 = silc_buffer_realloc(*clients,
4221 silc_buffer_truelen((*clients)) +
4222 silc_buffer_len(idp) :
4223 silc_buffer_len(idp)));
4227 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4228 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4229 silc_buffer_pull(*clients, silc_buffer_len(idp));
4231 SILC_PUT32_MSB(client->mode, mode);
4233 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4234 2, idp->data, silc_buffer_len(idp),
4236 tmp2 = silc_buffer_realloc(*umodes,
4238 silc_buffer_truelen((*umodes)) +
4239 silc_buffer_len(tmp) :
4240 silc_buffer_len(tmp)));
4244 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4245 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4246 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4247 silc_buffer_free(tmp);
4249 silc_buffer_free(idp);
4254 /* This function is used to announce our existing clients to our router
4255 when we've connected to it. If `creation_time' is non-zero then only
4256 the clients that has been created after the `creation_time' will be
4259 void silc_server_announce_clients(SilcServer server,
4260 unsigned long creation_time,
4261 SilcPacketStream remote)
4263 SilcBuffer clients = NULL;
4264 SilcBuffer umodes = NULL;
4266 SILC_LOG_DEBUG(("Announcing clients"));
4268 /* Get clients in local list */
4269 silc_server_announce_get_clients(server, server->local_list,
4270 &clients, &umodes, creation_time);
4272 /* As router we announce our global list as well */
4273 if (server->server_type == SILC_ROUTER)
4274 silc_server_announce_get_clients(server, server->global_list,
4275 &clients, &umodes, creation_time);
4278 silc_buffer_push(clients, clients->data - clients->head);
4279 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4281 /* Send the packet */
4282 silc_server_packet_send(server, remote,
4283 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4284 clients->data, silc_buffer_len(clients));
4286 silc_buffer_free(clients);
4290 silc_buffer_push(umodes, umodes->data - umodes->head);
4291 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4293 /* Send the packet */
4294 silc_server_packet_send(server, remote,
4295 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4296 umodes->data, silc_buffer_len(umodes));
4298 silc_buffer_free(umodes);
4302 /* Returns channel's topic for announcing it */
4304 void silc_server_announce_get_channel_topic(SilcServer server,
4305 SilcChannelEntry channel,
4310 if (channel->topic) {
4311 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4312 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4314 silc_buffer_len(chidp),
4316 strlen(channel->topic));
4317 silc_buffer_free(chidp);
4321 /* Returns channel's invite and ban lists */
4323 void silc_server_announce_get_inviteban(SilcServer server,
4324 SilcChannelEntry channel,
4328 SilcBuffer list, idp, idp2, tmp2;
4331 SilcHashTableList htl;
4332 const unsigned char a[1] = { 0x03 };
4334 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4336 /* Encode invite list */
4337 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4338 list = silc_buffer_alloc_size(2);
4339 type = silc_hash_table_count(channel->invite_list);
4340 SILC_PUT16_MSB(type, list->data);
4341 silc_hash_table_list(channel->invite_list, &htl);
4342 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4343 list = silc_argument_payload_encode_one(list, tmp2->data,
4344 silc_buffer_len(tmp2),
4345 SILC_PTR_TO_32(ptype));
4346 silc_hash_table_list_reset(&htl);
4348 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4350 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4351 idp->data, silc_buffer_len(idp),
4352 channel->channel_name,
4353 strlen(channel->channel_name),
4354 idp2->data, silc_buffer_len(idp2),
4356 list->data, silc_buffer_len(list));
4357 silc_buffer_free(idp2);
4358 silc_buffer_free(list);
4361 /* Encode ban list */
4362 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4363 list = silc_buffer_alloc_size(2);
4364 type = silc_hash_table_count(channel->ban_list);
4365 SILC_PUT16_MSB(type, list->data);
4366 silc_hash_table_list(channel->ban_list, &htl);
4367 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4368 list = silc_argument_payload_encode_one(list, tmp2->data,
4369 silc_buffer_len(tmp2),
4370 SILC_PTR_TO_32(ptype));
4371 silc_hash_table_list_reset(&htl);
4374 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4375 idp->data, silc_buffer_len(idp),
4377 list->data, silc_buffer_len(list));
4378 silc_buffer_free(list);
4381 silc_buffer_free(idp);
4384 /* Returns assembled packets for channel users of the `channel'. */
4386 void silc_server_announce_get_channel_users(SilcServer server,
4387 SilcChannelEntry channel,
4388 SilcBuffer *channel_modes,
4389 SilcBuffer *channel_users,
4390 SilcBuffer *channel_users_modes)
4392 SilcChannelClientEntry chl;
4393 SilcHashTableList htl;
4394 SilcBuffer chidp, clidp, csidp;
4395 SilcBuffer tmp, fkey = NULL, chpklist;
4397 unsigned char mode[4], ulimit[4];
4401 SILC_LOG_DEBUG(("Start"));
4403 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4404 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4405 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4408 SILC_PUT32_MSB(channel->mode, mode);
4409 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4410 SILC_PUT32_MSB(channel->user_limit, ulimit);
4411 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4412 if (channel->founder_key)
4413 fkey = silc_public_key_payload_encode(channel->founder_key);
4415 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4417 silc_buffer_len(csidp),
4420 hmac, hmac ? strlen(hmac) : 0,
4421 channel->passphrase,
4422 channel->passphrase ?
4423 strlen(channel->passphrase) : 0,
4424 fkey ? fkey->data : NULL,
4425 fkey ? silc_buffer_len(fkey) : 0,
4426 chpklist ? chpklist->data : NULL,
4428 silc_buffer_len(chpklist) : 0,
4430 SILC_CHANNEL_MODE_ULIMIT ?
4433 SILC_CHANNEL_MODE_ULIMIT ?
4434 sizeof(ulimit) : 0));
4435 len = silc_buffer_len(tmp);
4437 silc_buffer_realloc(*channel_modes,
4439 silc_buffer_truelen((*channel_modes)) + len : len));
4442 *channel_modes = tmp2;
4443 silc_buffer_pull_tail(*channel_modes,
4444 ((*channel_modes)->end -
4445 (*channel_modes)->data));
4446 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4447 silc_buffer_pull(*channel_modes, len);
4448 silc_buffer_free(tmp);
4449 silc_buffer_free(fkey);
4452 /* Now find all users on the channel */
4453 silc_hash_table_list(channel->user_list, &htl);
4454 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4455 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4457 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4461 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4463 silc_buffer_len(clidp),
4465 silc_buffer_len(chidp));
4466 len = silc_buffer_len(tmp);
4468 silc_buffer_realloc(*channel_users,
4470 silc_buffer_truelen((*channel_users)) + len : len));
4473 *channel_users = tmp2;
4474 silc_buffer_pull_tail(*channel_users,
4475 ((*channel_users)->end -
4476 (*channel_users)->data));
4478 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4479 silc_buffer_pull(*channel_users, len);
4480 silc_buffer_free(tmp);
4482 /* CUMODE notify for mode change on the channel */
4483 SILC_PUT32_MSB(chl->mode, mode);
4484 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4485 fkey = silc_public_key_payload_encode(channel->founder_key);
4486 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4488 silc_buffer_len(csidp),
4491 silc_buffer_len(clidp),
4492 fkey ? fkey->data : NULL,
4493 fkey ? silc_buffer_len(fkey) : 0);
4494 len = silc_buffer_len(tmp);
4496 silc_buffer_realloc(*channel_users_modes,
4497 (*channel_users_modes ?
4498 silc_buffer_truelen((*channel_users_modes)) +
4502 *channel_users_modes = tmp2;
4503 silc_buffer_pull_tail(*channel_users_modes,
4504 ((*channel_users_modes)->end -
4505 (*channel_users_modes)->data));
4507 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4508 silc_buffer_pull(*channel_users_modes, len);
4509 silc_buffer_free(tmp);
4510 silc_buffer_free(fkey);
4512 silc_buffer_free(clidp);
4514 silc_hash_table_list_reset(&htl);
4515 silc_buffer_free(chidp);
4516 silc_buffer_free(csidp);
4519 /* Returns assembled packets for all channels and users on those channels
4520 from the given ID List. The packets are in the form dictated by the
4521 New Channel and New Channel User payloads. */
4523 void silc_server_announce_get_channels(SilcServer server,
4525 SilcBuffer *channels,
4526 SilcBuffer **channel_modes,
4527 SilcBuffer *channel_users,
4528 SilcBuffer **channel_users_modes,
4529 SilcUInt32 *channel_users_modes_c,
4530 SilcBuffer **channel_topics,
4531 SilcBuffer **channel_invites,
4532 SilcBuffer **channel_bans,
4533 SilcChannelID ***channel_ids,
4534 unsigned long creation_time)
4537 SilcIDCacheEntry id_cache;
4538 SilcChannelEntry channel;
4539 unsigned char cid[32];
4541 SilcUInt16 name_len;
4543 int i = *channel_users_modes_c;
4547 SILC_LOG_DEBUG(("Start"));
4549 /* Go through all channels in the list */
4550 if (silc_idcache_get_all(id_list->channels, &list)) {
4551 silc_list_start(list);
4552 while ((id_cache = silc_list_get(list))) {
4553 channel = (SilcChannelEntry)id_cache->context;
4555 if (creation_time && channel->created < creation_time)
4560 SILC_LOG_DEBUG(("Announce Channel ID %s",
4561 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4563 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4564 name_len = strlen(channel->channel_name);
4567 len = 4 + name_len + id_len + 4;
4569 silc_buffer_realloc(*channels,
4571 silc_buffer_truelen((*channels)) +
4577 silc_buffer_pull_tail(*channels,
4578 ((*channels)->end - (*channels)->data));
4579 silc_buffer_format(*channels,
4580 SILC_STR_UI_SHORT(name_len),
4581 SILC_STR_UI_XNSTRING(channel->channel_name,
4583 SILC_STR_UI_SHORT(id_len),
4584 SILC_STR_UI_XNSTRING(cid, id_len),
4585 SILC_STR_UI_INT(channel->mode),
4587 silc_buffer_pull(*channels, len);
4590 if (creation_time && channel->updated < creation_time)
4596 /* Channel user modes */
4597 tmp = silc_realloc(*channel_users_modes,
4598 sizeof(**channel_users_modes) * (i + 1));
4601 *channel_users_modes = tmp;
4602 (*channel_users_modes)[i] = NULL;
4603 tmp = silc_realloc(*channel_modes,
4604 sizeof(**channel_modes) * (i + 1));
4607 *channel_modes = tmp;
4608 (*channel_modes)[i] = NULL;
4609 tmp = silc_realloc(*channel_ids,
4610 sizeof(**channel_ids) * (i + 1));
4614 (*channel_ids)[i] = NULL;
4615 silc_server_announce_get_channel_users(server, channel,
4616 &(*channel_modes)[i],
4618 &(*channel_users_modes)[i]);
4619 (*channel_ids)[i] = channel->id;
4621 /* Channel's topic */
4622 tmp = silc_realloc(*channel_topics,
4623 sizeof(**channel_topics) * (i + 1));
4626 *channel_topics = tmp;
4627 (*channel_topics)[i] = NULL;
4628 silc_server_announce_get_channel_topic(server, channel,
4629 &(*channel_topics)[i]);
4631 /* Channel's invite and ban list */
4632 tmp = silc_realloc(*channel_invites,
4633 sizeof(**channel_invites) * (i + 1));
4636 *channel_invites = tmp;
4637 (*channel_invites)[i] = NULL;
4638 tmp = silc_realloc(*channel_bans,
4639 sizeof(**channel_bans) * (i + 1));
4642 *channel_bans = tmp;
4643 (*channel_bans)[i] = NULL;
4644 silc_server_announce_get_inviteban(server, channel,
4645 &(*channel_invites)[i],
4646 &(*channel_bans)[i]);
4648 (*channel_users_modes_c)++;
4656 /* This function is used to announce our existing channels to our router
4657 when we've connected to it. This also announces the users on the
4658 channels to the router. If the `creation_time' is non-zero only the
4659 channels that was created after the `creation_time' are announced.
4660 Note that the channel users are still announced even if the `creation_time'
4663 void silc_server_announce_channels(SilcServer server,
4664 unsigned long creation_time,
4665 SilcPacketStream remote)
4667 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4668 SilcBuffer *channel_users_modes = NULL;
4669 SilcBuffer *channel_topics = NULL;
4670 SilcBuffer *channel_invites = NULL;
4671 SilcBuffer *channel_bans = NULL;
4672 SilcUInt32 channel_users_modes_c = 0;
4673 SilcChannelID **channel_ids = NULL;
4675 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4677 /* Get channels and channel users in local list */
4678 silc_server_announce_get_channels(server, server->local_list,
4679 &channels, &channel_modes,
4681 &channel_users_modes,
4682 &channel_users_modes_c,
4686 &channel_ids, creation_time);
4688 /* Get channels and channel users in global list */
4689 if (server->server_type != SILC_SERVER)
4690 silc_server_announce_get_channels(server, server->global_list,
4691 &channels, &channel_modes,
4693 &channel_users_modes,
4694 &channel_users_modes_c,
4698 &channel_ids, creation_time);
4701 silc_buffer_push(channels, channels->data - channels->head);
4702 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4704 /* Send the packet */
4705 silc_server_packet_send(server, remote,
4706 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4707 channels->data, silc_buffer_len(channels));
4709 silc_buffer_free(channels);
4712 if (channel_users) {
4713 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4714 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4715 silc_buffer_len(channel_users));
4717 /* Send the packet */
4718 silc_server_packet_send(server, remote,
4719 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4720 channel_users->data, silc_buffer_len(channel_users));
4722 silc_buffer_free(channel_users);
4725 if (channel_modes) {
4728 for (i = 0; i < channel_users_modes_c; i++) {
4729 if (!channel_modes[i])
4731 silc_buffer_push(channel_modes[i],
4732 channel_modes[i]->data -
4733 channel_modes[i]->head);
4734 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4735 silc_buffer_len(channel_modes[i]));
4736 silc_server_packet_send_dest(server, remote,
4737 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4738 channel_ids[i], SILC_ID_CHANNEL,
4739 channel_modes[i]->data,
4740 silc_buffer_len(channel_modes[i]));
4741 silc_buffer_free(channel_modes[i]);
4743 silc_free(channel_modes);
4746 if (channel_users_modes) {
4749 for (i = 0; i < channel_users_modes_c; i++) {
4750 if (!channel_users_modes[i])
4752 silc_buffer_push(channel_users_modes[i],
4753 channel_users_modes[i]->data -
4754 channel_users_modes[i]->head);
4755 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4756 silc_buffer_len(channel_users_modes[i]));
4757 silc_server_packet_send_dest(server, remote,
4758 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4759 channel_ids[i], SILC_ID_CHANNEL,
4760 channel_users_modes[i]->data,
4761 silc_buffer_len(channel_users_modes[i]));
4762 silc_buffer_free(channel_users_modes[i]);
4764 silc_free(channel_users_modes);
4767 if (channel_topics) {
4770 for (i = 0; i < channel_users_modes_c; i++) {
4771 if (!channel_topics[i])
4774 silc_buffer_push(channel_topics[i],
4775 channel_topics[i]->data -
4776 channel_topics[i]->head);
4777 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4778 silc_buffer_len(channel_topics[i]));
4779 silc_server_packet_send_dest(server, remote,
4780 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4781 channel_ids[i], SILC_ID_CHANNEL,
4782 channel_topics[i]->data,
4783 silc_buffer_len(channel_topics[i]));
4784 silc_buffer_free(channel_topics[i]);
4786 silc_free(channel_topics);
4789 if (channel_invites) {
4792 for (i = 0; i < channel_users_modes_c; i++) {
4793 if (!channel_invites[i])
4796 silc_buffer_push(channel_invites[i],
4797 channel_invites[i]->data -
4798 channel_invites[i]->head);
4799 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4800 silc_buffer_len(channel_invites[i]));
4801 silc_server_packet_send_dest(server, remote,
4802 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4803 channel_ids[i], SILC_ID_CHANNEL,
4804 channel_invites[i]->data,
4805 silc_buffer_len(channel_invites[i]));
4806 silc_buffer_free(channel_invites[i]);
4808 silc_free(channel_invites);
4814 for (i = 0; i < channel_users_modes_c; i++) {
4815 if (!channel_bans[i])
4818 silc_buffer_push(channel_bans[i],
4819 channel_bans[i]->data -
4820 channel_bans[i]->head);
4821 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4822 silc_buffer_len(channel_bans[i]));
4823 silc_server_packet_send_dest(server, remote,
4824 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4825 channel_ids[i], SILC_ID_CHANNEL,
4826 channel_bans[i]->data,
4827 silc_buffer_len(channel_bans[i]));
4828 silc_buffer_free(channel_bans[i]);
4830 silc_free(channel_bans);
4833 silc_free(channel_ids);
4836 /* Announces WATCH list. */
4838 void silc_server_announce_watches(SilcServer server,
4839 SilcPacketStream remote)
4841 SilcHashTableList htl;
4842 SilcBuffer buffer, idp, args, pkp;
4843 SilcClientEntry client;
4846 SILC_LOG_DEBUG(("Announcing watch list"));
4848 /* XXX because way we save the nicks (hash) we cannot announce them. */
4850 /* XXX we should send all public keys in one command if client is
4851 watching more than one key */
4852 silc_hash_table_list(server->watcher_list_pk, &htl);
4853 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4854 if (!client || !client->id)
4857 server->stat.commands_sent++;
4859 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4860 args = silc_buffer_alloc_size(2);
4861 silc_buffer_format(args,
4862 SILC_STR_UI_SHORT(1),
4864 pkp = silc_public_key_payload_encode(key);
4865 args = silc_argument_payload_encode_one(args, pkp->data,
4866 silc_buffer_len(pkp), 0x00);
4867 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4868 ++server->cmd_ident, 2,
4869 1, idp->data, silc_buffer_len(idp),
4871 silc_buffer_len(args));
4874 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4875 buffer->data, silc_buffer_len(buffer));
4877 silc_buffer_free(pkp);
4878 silc_buffer_free(args);
4879 silc_buffer_free(idp);
4880 silc_buffer_free(buffer);
4882 silc_hash_table_list_reset(&htl);
4885 /* Assembles user list and users mode list from the `channel'. */
4887 SilcBool silc_server_get_users_on_channel(SilcServer server,
4888 SilcChannelEntry channel,
4889 SilcBuffer *user_list,
4890 SilcBuffer *mode_list,
4891 SilcUInt32 *user_count)
4893 SilcChannelClientEntry chl;
4894 SilcHashTableList htl;
4895 SilcBuffer client_id_list;
4896 SilcBuffer client_mode_list;
4898 SilcUInt32 list_count = 0, len = 0;
4900 if (!silc_hash_table_count(channel->user_list))
4903 silc_hash_table_list(channel->user_list, &htl);
4904 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4905 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4906 silc_hash_table_list_reset(&htl);
4908 client_id_list = silc_buffer_alloc(len);
4910 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4911 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4912 silc_buffer_pull_tail(client_mode_list,
4913 silc_buffer_truelen(client_mode_list));
4915 silc_hash_table_list(channel->user_list, &htl);
4916 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4918 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4919 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4920 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4921 silc_buffer_free(idp);
4923 /* Client's mode on channel */
4924 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4925 silc_buffer_pull(client_mode_list, 4);
4929 silc_hash_table_list_reset(&htl);
4930 silc_buffer_push(client_id_list,
4931 client_id_list->data - client_id_list->head);
4932 silc_buffer_push(client_mode_list,
4933 client_mode_list->data - client_mode_list->head);
4935 *user_list = client_id_list;
4936 *mode_list = client_mode_list;
4937 *user_count = list_count;
4941 /* Saves users and their modes to the `channel'. */
4943 void silc_server_save_users_on_channel(SilcServer server,
4944 SilcPacketStream sock,
4945 SilcChannelEntry channel,
4946 SilcClientID *noadd,
4947 SilcBuffer user_list,
4948 SilcBuffer mode_list,
4949 SilcUInt32 user_count)
4955 SilcClientEntry client;
4956 SilcIDCacheEntry cache;
4957 SilcChannelClientEntry chl;
4959 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4960 channel->channel_name));
4962 for (i = 0; i < user_count; i++) {
4964 SILC_GET16_MSB(idp_len, user_list->data + 2);
4966 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4968 silc_buffer_pull(user_list, idp_len);
4971 SILC_GET32_MSB(mode, mode_list->data);
4972 silc_buffer_pull(mode_list, 4);
4974 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4979 /* Check if we have this client cached already. */
4980 client = silc_idlist_find_client_by_id(server->local_list,
4982 server->server_type, &cache);
4984 client = silc_idlist_find_client_by_id(server->global_list,
4986 server->server_type, &cache);
4988 /* If router did not find such Client ID in its lists then this must
4989 be bogus client or some router in the net is buggy. */
4990 if (server->server_type != SILC_SERVER)
4993 /* We don't have that client anywhere, add it. The client is added
4994 to global list since server didn't have it in the lists so it must be
4996 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4997 silc_id_dup(&id.u.client_id,
4999 silc_packet_get_context(sock),
5002 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
5006 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
5009 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
5010 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
5011 "%s", channel->channel_name));
5015 if (!silc_server_client_on_channel(client, channel, &chl)) {
5016 /* Client was not on the channel, add it. */
5017 chl = silc_calloc(1, sizeof(*chl));
5018 chl->client = client;
5020 chl->channel = channel;
5021 silc_hash_table_add(channel->user_list, chl->client, chl);
5022 silc_hash_table_add(client->channels, chl->channel, chl);
5023 channel->user_count++;
5031 /* Saves channels and channels user modes to the `client'. Removes
5032 the client from those channels that are not sent in the list but
5035 void silc_server_save_user_channels(SilcServer server,
5036 SilcPacketStream sock,
5037 SilcClientEntry client,
5038 SilcBuffer channels,
5039 SilcBuffer channels_user_modes)
5042 SilcUInt32 *chumodes;
5043 SilcChannelPayload entry;
5044 SilcChannelEntry channel;
5045 SilcChannelID channel_id;
5046 SilcChannelClientEntry chl;
5047 SilcHashTable ht = NULL;
5048 SilcHashTableList htl;
5052 if (!channels || !channels_user_modes ||
5053 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
5056 ch = silc_channel_payload_parse_list(channels->data,
5057 silc_buffer_len(channels));
5058 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
5060 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
5061 NULL, NULL, NULL, TRUE);
5062 silc_dlist_start(ch);
5063 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
5064 /* Check if we have this channel, and add it if we don't have it.
5065 Also add the client on the channel unless it is there already. */
5066 if (!silc_channel_get_id_parse(entry, &channel_id))
5068 channel = silc_idlist_find_channel_by_id(server->local_list,
5071 channel = silc_idlist_find_channel_by_id(server->global_list,
5074 if (server->server_type != SILC_SERVER) {
5079 /* We don't have that channel anywhere, add it. */
5080 name = silc_channel_get_name(entry, NULL);
5081 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
5082 silc_id_dup(&channel_id,
5084 server->router, NULL, NULL, 0);
5091 channel->mode = silc_channel_get_mode(entry);
5093 /* Add the client on the channel */
5094 if (!silc_server_client_on_channel(client, channel, &chl)) {
5095 chl = silc_calloc(1, sizeof(*chl));
5096 chl->client = client;
5097 chl->mode = chumodes[i++];
5098 chl->channel = channel;
5099 silc_hash_table_add(channel->user_list, chl->client, chl);
5100 silc_hash_table_add(client->channels, chl->channel, chl);
5101 channel->user_count++;
5104 chl->mode = chumodes[i++];
5107 silc_hash_table_add(ht, channel, channel);
5109 silc_channel_payload_list_free(ch);
5110 silc_free(chumodes);
5114 /* Go through the list again and remove client from channels that
5115 are no part of the list. */
5117 silc_hash_table_list(client->channels, &htl);
5118 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5119 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5120 silc_hash_table_del(chl->channel->user_list, chl->client);
5121 silc_hash_table_del(chl->client->channels, chl->channel);
5125 silc_hash_table_list_reset(&htl);
5126 silc_hash_table_free(ht);
5128 silc_hash_table_list(client->channels, &htl);
5129 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5130 silc_hash_table_del(chl->channel->user_list, chl->client);
5131 silc_hash_table_del(chl->client->channels, chl->channel);
5134 silc_hash_table_list_reset(&htl);
5138 /* Lookups route to the client indicated by the `id_data'. The connection
5139 object and internal data object is returned. Returns NULL if route
5140 could not be found to the client. If the `client_id' is specified then
5141 it is used and the `id_data' is ignored. */
5144 silc_server_get_client_route(SilcServer server,
5145 unsigned char *id_data,
5147 SilcClientID *client_id,
5148 SilcIDListData *idata,
5149 SilcClientEntry *client_entry)
5151 SilcClientID *id, clid;
5152 SilcClientEntry client;
5154 SILC_LOG_DEBUG(("Start"));
5157 *client_entry = NULL;
5159 /* Decode destination Client ID */
5161 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5163 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5165 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5168 /* If the destination belongs to our server we don't have to route
5169 the packet anywhere but to send it to the local destination. */
5170 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5174 /* If we are router and the client has router then the client is in
5175 our cell but not directly connected to us. */
5176 if (server->server_type == SILC_ROUTER && client->router) {
5177 /* We are of course in this case the client's router thus the route
5178 to the client is the server who owns the client. So, we will send
5179 the packet to that server. */
5181 *idata = (SilcIDListData)client->router;
5182 return client->router->connection;
5185 /* Seems that client really is directly connected to us */
5187 *idata = (SilcIDListData)client;
5189 *client_entry = client;
5190 return client->connection;
5193 /* Destination belongs to someone not in this server. If we are normal
5194 server our action is to send the packet to our router. */
5195 if (server->server_type != SILC_ROUTER && !server->standalone) {
5198 *idata = (SilcIDListData)server->router;
5199 return SILC_PRIMARY_ROUTE(server);
5202 /* We are router and we will perform route lookup for the destination
5203 and send the packet to fastest route. */
5204 if (server->server_type == SILC_ROUTER && !server->standalone) {
5205 /* Check first that the ID is valid */
5206 client = silc_idlist_find_client_by_id(server->global_list, id,
5209 SilcPacketStream dst_sock;
5211 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5214 if (idata && dst_sock)
5215 *idata = silc_packet_get_context(dst_sock);
5224 /* Encodes and returns channel list of channels the `client' has joined.
5225 Secret channels are not put to the list. */
5227 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5228 SilcClientEntry client,
5229 SilcBool get_private,
5230 SilcBool get_secret,
5231 SilcBuffer *user_mode_list)
5233 SilcBuffer buffer = NULL;
5234 SilcChannelEntry channel;
5235 SilcChannelClientEntry chl;
5236 SilcHashTableList htl;
5237 unsigned char cid[32];
5239 SilcUInt16 name_len;
5243 *user_mode_list = NULL;
5245 silc_hash_table_list(client->channels, &htl);
5246 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5247 channel = chl->channel;
5249 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5251 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5254 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5255 name_len = strlen(channel->channel_name);
5257 len = 4 + name_len + id_len + 4;
5258 buffer = silc_buffer_realloc(buffer,
5260 silc_buffer_truelen(buffer) + len : len));
5261 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5262 silc_buffer_format(buffer,
5263 SILC_STR_UI_SHORT(name_len),
5264 SILC_STR_DATA(channel->channel_name, name_len),
5265 SILC_STR_UI_SHORT(id_len),
5266 SILC_STR_DATA(cid, id_len),
5267 SILC_STR_UI_INT(chl->channel->mode),
5269 silc_buffer_pull(buffer, len);
5271 if (user_mode_list) {
5273 silc_buffer_realloc(*user_mode_list,
5275 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5276 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5277 (*user_mode_list)->data));
5278 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5279 silc_buffer_pull(*user_mode_list, 4);
5282 silc_hash_table_list_reset(&htl);
5285 silc_buffer_push(buffer, buffer->data - buffer->head);
5286 if (user_mode_list && *user_mode_list)
5287 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5288 (*user_mode_list)->head));
5293 /* Task callback used to retrieve network statistical information from
5294 router server once in a while. */
5296 SILC_TASK_CALLBACK(silc_server_get_stats)
5298 SilcServer server = (SilcServer)context;
5299 SilcBuffer idp, packet;
5301 if (!server->standalone) {
5302 SILC_LOG_DEBUG(("Retrieving stats from router"));
5303 server->stat.commands_sent++;
5304 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5306 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5307 ++server->cmd_ident, 1,
5309 silc_buffer_len(idp));
5310 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5311 SILC_PACKET_COMMAND, 0, packet->data,
5312 silc_buffer_len(packet));
5313 silc_buffer_free(packet);
5314 silc_buffer_free(idp);
5318 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,