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 silc_server_create_connections(server);
205 silc_server_free_sock_user_data(server, stream, NULL);
207 /* If backup disconnected then mark that resuming will not be allowed */
208 if (server->server_type == SILC_ROUTER && !server->backup_router &&
209 idata->conn_type == SILC_CONN_SERVER) {
210 SilcServerEntry server_entry = (SilcServerEntry)idata;
211 if (server_entry->server_type == SILC_BACKUP_ROUTER)
212 server->backup_closed = TRUE;
215 silc_server_free_sock_user_data(server, stream, NULL);
218 silc_server_close_connection(server, stream);
221 SILC_TASK_CALLBACK(silc_server_packet_error_timeout)
223 SilcServer server = app_context;
224 SilcPacketStream stream = context;
225 SilcIDListData idata = silc_packet_get_context(stream);
230 if (server->router_conn && server->router_conn->sock == stream &&
231 !server->router && server->standalone) {
232 silc_server_create_connections(server);
234 /* If backup disconnected then mark that resuming will not be allowed */
235 if (server->server_type == SILC_ROUTER && !server->backup_router &&
236 idata->conn_type == SILC_CONN_SERVER) {
237 SilcServerEntry server_entry = (SilcServerEntry)idata;
238 if (server_entry->server_type == SILC_BACKUP_ROUTER)
239 server->backup_closed = TRUE;
242 silc_server_free_sock_user_data(server, stream, NULL);
245 silc_server_close_connection(server, stream);
248 /* Packet engine callback to indicate error */
250 static void silc_server_packet_error(SilcPacketEngine engine,
251 SilcPacketStream stream,
252 SilcPacketError error,
253 void *callback_context,
254 void *stream_context)
256 SilcServer server = callback_context;
257 SilcIDListData idata = silc_packet_get_context(stream);
258 SilcStream sock = silc_packet_stream_get_stream(stream);
262 SILC_LOG_DEBUG(("Packet error, sock %p", stream));
267 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
270 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
271 SILC_CONNTYPE_STRING(idata->conn_type),
272 silc_packet_error_string(error)));
274 if (!silc_packet_stream_is_valid(stream))
277 silc_schedule_task_add_timeout(server->schedule,
278 silc_server_packet_error_timeout,
282 /* Packet stream callbacks */
283 static SilcPacketCallbacks silc_server_stream_cbs =
285 silc_server_packet_receive,
286 silc_server_packet_eos,
287 silc_server_packet_error
290 /* Parses the packet type and calls what ever routines the packet type
291 requires. This is done for all incoming packets. */
293 static void silc_server_packet_parse_type(SilcServer server,
294 SilcPacketStream sock,
297 SilcPacketType type = packet->type;
298 SilcIDListData idata = silc_packet_get_context(sock);
300 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
301 silc_get_packet_name(type), packet->flags));
303 /* Parse the packet type */
305 case SILC_PACKET_NOTIFY:
307 * Received notify packet. Server can receive notify packets from
308 * router. Server then relays the notify messages to clients if needed.
310 if (packet->flags & SILC_PACKET_FLAG_LIST)
311 silc_server_notify_list(server, sock, packet);
313 silc_server_notify(server, sock, packet);
317 * Private Message packets
319 case SILC_PACKET_PRIVATE_MESSAGE:
321 * Received private message packet. The packet is coming from either
324 if (packet->flags & SILC_PACKET_FLAG_LIST)
326 idata->last_receive = time(NULL);
327 silc_server_private_message(server, sock, packet);
333 case SILC_PACKET_CHANNEL_MESSAGE:
335 * Received channel message. Channel messages are special packets
336 * (although probably most common ones) thus they are handled
339 if (packet->flags & SILC_PACKET_FLAG_LIST)
341 idata->last_receive = time(NULL);
342 silc_server_channel_message(server, sock, packet);
348 case SILC_PACKET_COMMAND:
350 * Recived command. Processes the command request and allocates the
351 * command context and calls the command.
353 if (packet->flags & SILC_PACKET_FLAG_LIST)
355 server->stat.commands_received++;
356 silc_server_command_process(server, sock, packet);
359 case SILC_PACKET_COMMAND_REPLY:
361 * Received command reply packet. Received command reply to command. It
362 * may be reply to command sent by us or reply to command sent by client
363 * that we've routed further.
365 if (packet->flags & SILC_PACKET_FLAG_LIST)
367 server->stat.commands_received++;
368 silc_server_command_reply(server, sock, packet);
371 case SILC_PACKET_DISCONNECT:
374 char *message = NULL;
375 const char *hostname, *ip;
377 if (packet->flags & SILC_PACKET_FLAG_LIST)
379 if (silc_buffer_len(&packet->buffer) < 1)
382 status = (SilcStatus)packet->buffer.data[0];
383 if (silc_buffer_len(&packet->buffer) > 1 &&
384 silc_utf8_valid(packet->buffer.data + 1,
385 silc_buffer_len(&packet->buffer) - 1))
386 message = silc_memdup(packet->buffer.data + 1,
387 silc_buffer_len(&packet->buffer) - 1);
389 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
390 NULL, &hostname, &ip, NULL))
393 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
394 silc_get_status_message(status), status,
395 message ? message : ""));
399 /* Do not switch to backup in case of error */
400 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
402 /* If backup disconnected then mark that resuming will not be allowed */
403 if (server->server_type == SILC_ROUTER && !server->backup_router &&
404 idata->conn_type == SILC_CONN_SERVER) {
405 SilcServerEntry server_entry = (SilcServerEntry)idata;
406 if (server_entry->server_type == SILC_BACKUP_ROUTER)
407 server->backup_closed = TRUE;
410 /* Handle the disconnection from our end too */
411 if (SILC_IS_LOCAL(idata))
412 silc_server_free_sock_user_data(server, sock, NULL);
413 silc_server_close_connection(server, sock);
414 server->backup_noswitch = FALSE;
418 case SILC_PACKET_CHANNEL_KEY:
420 * Received key for channel. As channels are created by the router
421 * the keys are as well. We will distribute the key to all of our
422 * locally connected clients on the particular channel. Router
423 * never receives this channel and thus is ignored.
425 if (packet->flags & SILC_PACKET_FLAG_LIST)
427 silc_server_channel_key(server, sock, packet);
430 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
432 * Private message key packet.
434 if (packet->flags & SILC_PACKET_FLAG_LIST)
436 silc_server_private_message_key(server, sock, packet);
439 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
441 * Connection authentication request packet. When we receive this packet
442 * we will send to the other end information about our mandatory
443 * authentication method for the connection. This packet maybe received
446 if (packet->flags & SILC_PACKET_FLAG_LIST)
448 silc_server_connection_auth_request(server, sock, packet);
451 case SILC_PACKET_NEW_ID:
453 * Received New ID packet. This includes some new ID that has been
454 * created. It may be for client, server or channel. This is the way
455 * to distribute information about new registered entities in the
458 if (packet->flags & SILC_PACKET_FLAG_LIST)
459 silc_server_new_id_list(server, sock, packet);
461 silc_server_new_id(server, sock, packet);
464 case SILC_PACKET_NEW_CLIENT:
466 * Received new client packet. This includes client information that
467 * we will use to create initial client ID. After creating new
468 * ID we will send it to the client.
470 if (packet->flags & SILC_PACKET_FLAG_LIST)
472 silc_server_new_client(server, sock, packet);
475 case SILC_PACKET_NEW_SERVER:
477 * Received new server packet. This includes Server ID and some other
478 * information that we may save. This is received after server has
481 if (packet->flags & SILC_PACKET_FLAG_LIST)
483 silc_server_new_server(server, sock, packet);
486 case SILC_PACKET_NEW_CHANNEL:
488 * Received new channel packet. Information about new channel in the
489 * network are distributed using this packet.
491 if (packet->flags & SILC_PACKET_FLAG_LIST)
492 silc_server_new_channel_list(server, sock, packet);
494 silc_server_new_channel(server, sock, packet);
497 case SILC_PACKET_HEARTBEAT:
499 * Received heartbeat.
501 if (packet->flags & SILC_PACKET_FLAG_LIST)
505 case SILC_PACKET_KEY_AGREEMENT:
507 * Received heartbeat.
509 if (packet->flags & SILC_PACKET_FLAG_LIST)
511 silc_server_key_agreement(server, sock, packet);
514 case SILC_PACKET_REKEY:
516 * Received re-key packet. The sender wants to regenerate the session
519 if (packet->flags & SILC_PACKET_FLAG_LIST)
521 silc_server_rekey(server, sock, packet);
524 case SILC_PACKET_FTP:
526 if (packet->flags & SILC_PACKET_FLAG_LIST)
528 silc_server_ftp(server, sock, packet);
531 case SILC_PACKET_RESUME_CLIENT:
533 if (packet->flags & SILC_PACKET_FLAG_LIST)
535 silc_server_resume_client(server, sock, packet);
538 case SILC_PACKET_RESUME_ROUTER:
539 /* Resume router packet received. This packet is received for backup
540 router resuming protocol. */
541 if (packet->flags & SILC_PACKET_FLAG_LIST)
543 silc_server_backup_resume_router(server, sock, packet);
547 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
552 /****************************** Server API **********************************/
554 /* Allocates a new SILC server object. This has to be done before the server
555 can be used. After allocation one must call silc_server_init to initialize
556 the server. The new allocated server object is returned to the new_server
559 SilcBool silc_server_alloc(SilcServer *new_server)
563 SILC_LOG_DEBUG(("Allocating new server object"));
565 server = silc_calloc(1, sizeof(*server));
568 server->server_type = SILC_SERVER;
569 server->standalone = TRUE;
570 server->local_list = silc_calloc(1, sizeof(*server->local_list));
571 if (!server->local_list)
573 server->global_list = silc_calloc(1, sizeof(*server->global_list));
574 if (!server->global_list)
576 server->pending_commands = silc_dlist_init();
577 if (!server->pending_commands)
579 server->listeners = silc_dlist_init();
580 if (!server->listeners)
582 server->repository = silc_skr_alloc();
583 if (!server->repository)
585 server->conns = silc_dlist_init();
588 server->expired_clients = silc_dlist_init();
589 if (!server->expired_clients)
592 *new_server = server;
597 /* Free's the SILC server object. This is called at the very end before
600 void silc_server_free(SilcServer server)
603 SilcIDCacheEntry cache;
604 SilcIDListData idata;
606 SILC_LOG_DEBUG(("Free server %p", server));
611 silc_server_backup_free(server);
612 silc_server_config_unref(&server->config_ref);
614 silc_rng_free(server->rng);
615 if (server->public_key)
616 silc_pkcs_public_key_free(server->public_key);
617 if (server->private_key)
618 silc_pkcs_private_key_free(server->private_key);
619 if (server->pending_commands)
620 silc_dlist_uninit(server->pending_commands);
621 if (server->id_entry) {
622 if (server->id_entry->data.sconn)
623 silc_schedule_task_del_by_context(server->schedule,
624 server->id_entry->data.sconn->sock);
625 silc_idlist_del_server(server->local_list, server->id_entry);
628 /* Delete all channels */
629 if (silc_idcache_get_all(server->local_list->channels, &list)) {
630 silc_list_start(list);
631 while ((cache = silc_list_get(list)))
632 silc_idlist_del_channel(server->local_list, cache->context);
634 if (silc_idcache_get_all(server->global_list->channels, &list)) {
635 silc_list_start(list);
636 while ((cache = silc_list_get(list)))
637 silc_idlist_del_channel(server->global_list, cache->context);
640 /* Delete all clients */
641 if (silc_idcache_get_all(server->local_list->clients, &list)) {
642 silc_list_start(list);
643 while ((cache = silc_list_get(list))) {
644 silc_schedule_task_del_by_context(server->schedule, cache->context);
645 silc_idlist_del_client(server->local_list, cache->context);
648 if (silc_idcache_get_all(server->global_list->clients, &list)) {
649 silc_list_start(list);
650 while ((cache = silc_list_get(list))) {
651 silc_schedule_task_del_by_context(server->schedule, cache->context);
652 silc_idlist_del_client(server->global_list, cache->context);
656 /* Delete all servers */
657 if (silc_idcache_get_all(server->local_list->servers, &list)) {
658 silc_list_start(list);
659 while ((cache = silc_list_get(list))) {
660 idata = (SilcIDListData)cache->context;
662 silc_schedule_task_del_by_context(server->schedule,
664 silc_idlist_del_server(server->local_list, cache->context);
667 if (silc_idcache_get_all(server->global_list->servers, &list)) {
668 while ((cache = silc_list_get(list))) {
669 idata = (SilcIDListData)cache->context;
671 silc_schedule_task_del_by_context(server->schedule,
673 silc_idlist_del_server(server->global_list, cache->context);
677 silc_schedule_task_del_by_context(server->schedule, server);
678 silc_schedule_uninit(server->schedule);
679 server->schedule = NULL;
681 silc_idcache_free(server->local_list->clients);
682 silc_idcache_free(server->local_list->servers);
683 silc_idcache_free(server->local_list->channels);
684 silc_idcache_free(server->global_list->clients);
685 silc_idcache_free(server->global_list->servers);
686 silc_idcache_free(server->global_list->channels);
687 silc_hash_table_free(server->watcher_list);
688 silc_hash_table_free(server->watcher_list_pk);
689 silc_hash_free(server->md5hash);
690 silc_hash_free(server->sha1hash);
692 silc_dlist_uninit(server->listeners);
693 silc_dlist_uninit(server->conns);
694 silc_dlist_uninit(server->expired_clients);
695 silc_skr_free(server->repository);
696 silc_packet_engine_stop(server->packet_engine);
698 silc_free(server->local_list);
699 silc_free(server->global_list);
700 silc_free(server->server_name);
703 silc_hmac_unregister_all();
704 silc_hash_unregister_all();
705 silc_cipher_unregister_all();
706 silc_pkcs_unregister_all();
709 /* Creates a new server listener. */
711 static SilcNetListener
712 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
714 SilcNetListener listener;
717 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
718 server->config->require_reverse_lookup,
720 silc_server_accept_new_connection, server);
722 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
730 /* Adds a secondary listener. */
732 SilcBool silc_server_init_secondary(SilcServer server)
734 SilcServerConfigServerInfoInterface *interface;
735 SilcNetListener listener;
737 for (interface = server->config->server_info->secondary; interface;
738 interface = interface->next) {
739 listener = silc_server_listen(server, interface->server_ip,
743 silc_dlist_add(server->listeners, listener);
749 /* Initializes the entire SILC server. This is called always before running
750 the server. This is called only once at the initialization of the program.
751 This binds the server to its listenning port. After this function returns
752 one should call silc_server_run to start the server. This returns TRUE
753 when everything is ok to run the server. Configuration file must be
754 read and parsed before calling this. */
756 SilcBool silc_server_init(SilcServer server)
759 SilcServerEntry id_entry;
760 SilcNetListener listener;
764 SILC_LOG_DEBUG(("Initializing server"));
766 server->starttime = time(NULL);
768 /* Take config object for us */
769 silc_server_config_ref(&server->config_ref, server->config,
773 /* Set debugging on if configured */
774 if (server->config->debug_string) {
775 silc_log_debug(TRUE);
776 silc_log_set_debug_string(server->config->debug_string);
778 #endif /* SILC_DEBUG */
780 /* Steal public and private key from the config object */
781 server->public_key = server->config->server_info->public_key;
782 server->private_key = server->config->server_info->private_key;
783 server->config->server_info->public_key = NULL;
784 server->config->server_info->private_key = NULL;
786 /* Register all configured ciphers, PKCS and hash functions. */
787 if (!silc_server_config_register_ciphers(server))
788 silc_cipher_register_default();
789 if (!silc_server_config_register_pkcs(server))
790 silc_pkcs_register_default();
791 if (!silc_server_config_register_hashfuncs(server))
792 silc_hash_register_default();
793 if (!silc_server_config_register_hmacs(server))
794 silc_hmac_register_default();
796 /* Initialize random number generator for the server. */
797 server->rng = silc_rng_alloc();
798 silc_rng_init(server->rng);
799 silc_rng_global_init(server->rng);
801 /* Initialize hash functions for server to use */
802 silc_hash_alloc("md5", &server->md5hash);
803 silc_hash_alloc("sha1", &server->sha1hash);
805 /* Initialize the scheduler */
806 server->schedule = silc_schedule_init(server->config->param.connections_max,
808 if (!server->schedule)
811 /* First, register log files configuration for error output */
812 silc_server_config_setlogfiles(server);
814 /* Initialize ID caches */
815 server->local_list->clients =
816 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
818 server->local_list->servers =
819 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
821 server->local_list->channels =
822 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
825 /* These are allocated for normal server as well as these hold some
826 global information that the server has fetched from its router. For
827 router these are used as they are supposed to be used on router. */
828 server->global_list->clients =
829 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
831 server->global_list->servers =
832 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
834 server->global_list->channels =
835 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
838 /* Init watcher lists */
839 server->watcher_list =
840 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
841 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
843 if (!server->watcher_list)
845 server->watcher_list_pk =
846 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
847 silc_hash_public_key_compare, NULL,
849 if (!server->watcher_list_pk)
852 /* Create TCP listener */
853 listener = silc_server_listen(
855 server->config->server_info->primary == NULL ? NULL :
856 server->config->server_info->primary->server_ip,
857 server->config->server_info->primary == NULL ? 0 :
858 server->config->server_info->primary->port);
861 silc_dlist_add(server->listeners, listener);
863 /* Create a Server ID for the server. */
864 port = silc_net_listener_get_port(listener, NULL);
865 ip = silc_net_listener_get_ip(listener, NULL);
866 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
867 server->config->server_info->primary->public_ip :
868 ip[0], port[0], server->rng, &id);
877 server->server_name = server->config->server_info->server_name;
878 server->config->server_info->server_name = NULL;
879 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
880 sizeof(server->id_string), &server->id_string_len);
882 /* Add ourselves to the server list. We don't have a router yet
883 beacuse we haven't established a route yet. It will be done later.
884 For now, NULL is sent as router. This allocates new entry to
887 silc_idlist_add_server(server->local_list, strdup(server->server_name),
889 silc_id_dup(server->id, SILC_ID_SERVER),
892 SILC_LOG_ERROR(("Could not add local server to cache"));
895 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
896 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
897 SILC_CONN_SERVER : SILC_CONN_ROUTER);
898 server->id_entry = id_entry;
900 /* Create secondary TCP listeners */
901 if (silc_server_init_secondary(server) == FALSE)
904 server->listenning = TRUE;
906 /* Create connections to configured routers. */
907 silc_server_create_connections(server);
909 /* If server connections has been configured then we must be router as
910 normal server cannot have server connections, only router connections. */
911 if (server->config->servers) {
912 SilcServerConfigServer *ptr = server->config->servers;
914 server->server_type = SILC_ROUTER;
916 if (ptr->backup_router) {
917 server->server_type = SILC_BACKUP_ROUTER;
918 server->backup_router = TRUE;
919 server->id_entry->server_type = SILC_BACKUP_ROUTER;
926 if (server->server_type != SILC_ROUTER) {
927 server->stat.servers = 1;
928 server->stat.cell_servers = 1;
930 server->stat.routers = 1;
933 /* If we are normal server we'll retrieve network statisticial information
934 once in a while from the router. */
935 if (server->server_type != SILC_ROUTER)
936 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
939 /* Start packet engine */
940 server->packet_engine =
941 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
942 &silc_server_stream_cbs, server);
943 if (!server->packet_engine)
946 /* Register client entry expiration timeout */
947 silc_schedule_task_add_timeout(server->schedule,
948 silc_server_purge_expired_clients, server,
951 /* Initialize HTTP server */
952 silc_server_http_init(server);
954 SILC_LOG_DEBUG(("Server initialized"));
956 /* We are done here, return succesfully */
960 silc_server_config_unref(&server->config_ref);
964 /* Task callback to close a socket connection after rehash */
966 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
968 SilcServer server = app_context;
969 SilcPacketStream sock = context;
970 SilcIDListData idata = silc_packet_get_context(sock);
971 const char *hostname;
974 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
975 NULL, &hostname, NULL, &port);
977 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
978 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
979 silc_schedule_task_del_by_context(server->schedule, sock);
980 silc_server_disconnect_remote(server, sock,
981 SILC_STATUS_ERR_BANNED_FROM_SERVER,
982 "This connection is removed from "
984 silc_server_free_sock_user_data(server, sock, NULL);
987 /* This function basically reads the config file again and switches the config
988 object pointed by the server object. After that, we have to fix various
989 things such as the server_name and the listening ports.
990 Keep in mind that we no longer have the root privileges at this point. */
992 SilcBool silc_server_rehash(SilcServer server)
994 SilcServerConfig newconfig;
996 SILC_LOG_INFO(("Rehashing server"));
998 /* Reset the logging system */
999 silc_log_quick(TRUE);
1000 silc_log_flush_all();
1002 /* Start the main rehash phase (read again the config file) */
1003 newconfig = silc_server_config_alloc(server->config_file, server);
1005 SILC_LOG_ERROR(("Rehash FAILED."));
1009 /* Fix the server_name field */
1010 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1011 silc_free(server->server_name);
1013 /* Check server name */
1014 server->server_name =
1015 silc_identifier_check(newconfig->server_info->server_name,
1016 strlen(newconfig->server_info->server_name),
1017 SILC_STRING_LOCALE, 256, NULL);
1018 if (!server->server_name) {
1019 SILC_LOG_ERROR(("Malformed server name string '%s'",
1020 server->config->server_info->server_name));
1024 /* Update the idcache list with a fresh pointer */
1025 silc_free(server->id_entry->server_name);
1026 server->id_entry->server_name = strdup(server->server_name);
1027 silc_idcache_update_by_context(server->local_list->servers,
1028 server->id_entry, NULL,
1029 strdup(server->id_entry->server_name),
1034 silc_server_config_setlogfiles(server);
1036 /* Change new key pair if necessary */
1037 if (newconfig->server_info->public_key &&
1038 !silc_pkcs_public_key_compare(server->public_key,
1039 newconfig->server_info->public_key)) {
1040 silc_pkcs_public_key_free(server->public_key);
1041 silc_pkcs_private_key_free(server->private_key);
1042 server->public_key = newconfig->server_info->public_key;
1043 server->private_key = newconfig->server_info->private_key;
1044 newconfig->server_info->public_key = NULL;
1045 newconfig->server_info->private_key = NULL;
1048 /* Check for unconfigured server and router connections and close
1049 connections that were unconfigured. */
1051 if (server->config->routers) {
1052 SilcServerConfigRouter *ptr;
1053 SilcServerConfigRouter *newptr;
1056 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1059 /* Check whether new config has this one too */
1060 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1061 if (silc_string_compare(newptr->host, ptr->host) &&
1062 newptr->port == ptr->port &&
1063 newptr->initiator == ptr->initiator) {
1069 if (!found && ptr->host) {
1070 /* Remove this connection */
1071 SilcPacketStream sock;
1072 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1073 ptr->host, ptr->port);
1075 silc_schedule_task_add_timeout(server->schedule,
1076 silc_server_rehash_close_connection,
1082 if (server->config->servers) {
1083 SilcServerConfigServer *ptr;
1084 SilcServerConfigServer *newptr;
1087 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1090 /* Check whether new config has this one too */
1091 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1092 if (silc_string_compare(newptr->host, ptr->host)) {
1098 if (!found && ptr->host) {
1099 /* Remove this connection */
1100 SilcPacketStream sock;
1101 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1104 silc_schedule_task_add_timeout(server->schedule,
1105 silc_server_rehash_close_connection,
1111 if (server->config->clients) {
1112 SilcServerConfigClient *ptr;
1113 SilcServerConfigClient *newptr;
1116 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1119 /* Check whether new config has this one too */
1120 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1121 if (silc_string_compare(newptr->host, ptr->host)) {
1127 if (!found && ptr->host) {
1128 /* Remove this connection */
1129 SilcPacketStream sock;
1130 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1133 silc_schedule_task_add_timeout(server->schedule,
1134 silc_server_rehash_close_connection,
1140 /* Create connections after rehash */
1141 silc_server_create_connections(server);
1143 /* Check whether our router status has changed */
1144 if (newconfig->servers) {
1145 SilcServerConfigServer *ptr = newconfig->servers;
1147 server->server_type = SILC_ROUTER;
1149 if (ptr->backup_router) {
1150 server->server_type = SILC_BACKUP_ROUTER;
1151 server->backup_router = TRUE;
1152 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1159 /* Our old config is gone now. We'll unreference our reference made in
1160 silc_server_init and then destroy it since we are destroying it
1161 underneath the application (layer which called silc_server_init). */
1162 silc_server_config_unref(&server->config_ref);
1163 silc_server_config_destroy(server->config);
1165 /* Take new config context */
1166 server->config = newconfig;
1167 silc_server_config_ref(&server->config_ref, server->config, server->config);
1170 /* Set debugging on if configured */
1171 if (server->config->debug_string) {
1172 silc_log_debug(TRUE);
1173 silc_log_set_debug_string(server->config->debug_string);
1175 #endif /* SILC_DEBUG */
1177 SILC_LOG_DEBUG(("Server rehashed"));
1182 /* The heart of the server. This runs the scheduler thus runs the server.
1183 When this returns the server has been stopped and the program will
1186 void silc_server_run(SilcServer server)
1188 SILC_LOG_INFO(("SILC Server started"));
1190 /* Start the scheduler, the heart of the SILC server. When this returns
1191 the program will be terminated. */
1192 silc_schedule(server->schedule);
1195 /* Stops the SILC server. This function is used to shutdown the server.
1196 This is usually called after the scheduler has returned. After stopping
1197 the server one should call silc_server_free. */
1199 void silc_server_stop(SilcServer server)
1202 SilcPacketStream ps;
1203 SilcNetListener listener;
1205 SILC_LOG_INFO(("SILC Server shutting down"));
1207 server->server_shutdown = TRUE;
1209 /* Close all connections */
1210 if (server->packet_engine) {
1211 list = silc_packet_engine_get_streams(server->packet_engine);
1213 silc_dlist_start(list);
1214 while ((ps = silc_dlist_get(list))) {
1215 SilcIDListData idata = silc_packet_get_context(ps);
1217 if (!silc_packet_stream_is_valid(ps))
1221 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1223 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1224 "Server is shutting down");
1225 silc_server_free_sock_user_data(server, ps,
1226 "Server is shutting down");
1228 silc_packet_engine_free_streams_list(list);
1231 /* We are not connected to network anymore */
1232 server->standalone = TRUE;
1234 silc_dlist_start(server->listeners);
1235 while ((listener = silc_dlist_get(server->listeners)))
1236 silc_net_close_listener(listener);
1238 silc_server_http_uninit(server);
1240 /* Cancel any possible retry timeouts */
1241 silc_schedule_task_del_by_callback(server->schedule,
1242 silc_server_connect_router);
1243 silc_schedule_task_del_by_callback(server->schedule,
1244 silc_server_connect_to_router_retry);
1245 silc_schedule_task_del_by_callback(server->schedule,
1246 silc_server_connect_to_router);
1248 silc_schedule_stop(server->schedule);
1250 SILC_LOG_DEBUG(("Server stopped"));
1253 /* Purge expired client entries from the server */
1255 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1257 SilcServer server = context;
1258 SilcClientEntry client;
1260 SilcUInt64 curtime = silc_time();
1262 SILC_LOG_DEBUG(("Expire timeout"));
1264 silc_dlist_start(server->expired_clients);
1265 while ((client = silc_dlist_get(server->expired_clients))) {
1266 if (client->data.status & SILC_IDLIST_STATUS_REGISTERED)
1269 /* For unregistered clients the created timestamp is actually
1270 unregistered timestamp. Make sure client remains in history
1271 at least 500 seconds. */
1272 if (curtime - client->data.created < 500)
1275 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1276 server->local_list : server->global_list);
1278 silc_idlist_del_data(client);
1279 silc_idlist_del_client(id_list, client);
1280 silc_dlist_del(server->expired_clients, client);
1283 silc_schedule_task_add_timeout(server->schedule,
1284 silc_server_purge_expired_clients, server,
1289 /******************************* Connecting *********************************/
1291 /* Free connection context */
1293 void silc_server_connection_free(SilcServerConnection sconn)
1297 SILC_LOG_DEBUG(("Free connection %p", sconn));
1298 silc_dlist_del(sconn->server->conns, sconn);
1299 silc_server_config_unref(&sconn->conn);
1300 silc_free(sconn->remote_host);
1301 silc_free(sconn->backup_replace_ip);
1305 /* Creates connection to a remote router. */
1307 void silc_server_create_connection(SilcServer server,
1310 const char *remote_host, SilcUInt32 port,
1311 SilcServerConnectCallback callback,
1314 SilcServerConnection sconn;
1316 /* Allocate connection object for hold connection specific stuff. */
1317 sconn = silc_calloc(1, sizeof(*sconn));
1320 sconn->remote_host = strdup(remote_host);
1321 sconn->remote_port = port;
1322 sconn->no_reconnect = reconnect == FALSE;
1323 sconn->callback = callback;
1324 sconn->callback_context = context;
1325 sconn->no_conf = dynamic;
1326 sconn->server = server;
1328 SILC_LOG_DEBUG(("Created connection %p", sconn));
1330 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1334 /* Connection authentication completion callback */
1337 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1340 SilcServerConnection sconn = context;
1341 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1342 SilcServer server = entry->server;
1343 SilcServerConfigServer *conn;
1344 SilcServerConfigConnParams *param;
1345 SilcIDListData idata;
1346 SilcServerEntry id_entry = NULL;
1347 unsigned char id[32];
1352 SILC_LOG_DEBUG(("Connection %p authentication completed, entry %p",
1357 if (success == FALSE) {
1358 /* Authentication failed */
1359 /* XXX retry connecting */
1361 if (sconn->callback)
1362 (*sconn->callback)(server, NULL, sconn->callback_context);
1363 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1364 silc_server_disconnect_remote(server, sconn->sock,
1365 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1369 /* XXX For now remote is router always */
1370 entry->data.conn_type = SILC_CONN_ROUTER;
1372 SILC_LOG_INFO(("Connected to %s %s",
1373 SILC_CONNTYPE_STRING(entry->data.conn_type),
1374 sconn->remote_host));
1376 /* Create the actual entry for remote entity */
1377 switch (entry->data.conn_type) {
1378 case SILC_CONN_SERVER:
1379 SILC_LOG_DEBUG(("Remote is SILC server"));
1381 /* Add new server. The server must register itself to us before it
1382 becomes registered to SILC network. */
1383 id_entry = silc_idlist_add_server(server->local_list,
1384 strdup(sconn->remote_host),
1385 SILC_SERVER, NULL, NULL, sconn->sock);
1387 if (sconn->callback)
1388 (*sconn->callback)(server, NULL, sconn->callback_context);
1389 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1390 silc_server_disconnect_remote(server, sconn->sock,
1391 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1396 server->stat.my_servers++;
1397 if (server->server_type == SILC_ROUTER)
1398 server->stat.servers++;
1399 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1401 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1404 case SILC_CONN_ROUTER:
1405 SILC_LOG_DEBUG(("Remote is SILC router"));
1407 /* Register to network */
1408 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1409 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1410 SILC_STR_UI_SHORT(id_len),
1411 SILC_STR_DATA(id, id_len),
1412 SILC_STR_UI_SHORT(strlen(server->server_name)),
1413 SILC_STR_DATA(server->server_name,
1414 strlen(server->server_name)),
1416 if (sconn->callback)
1417 (*sconn->callback)(server, NULL, sconn->callback_context);
1418 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1419 silc_server_disconnect_remote(server, sconn->sock,
1420 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1425 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1427 /* Check that we do not have this ID already */
1428 id_entry = silc_idlist_find_server_by_id(server->local_list,
1429 &remote_id.u.server_id,
1432 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1434 id_entry = silc_idlist_find_server_by_id(server->global_list,
1435 &remote_id.u.server_id,
1438 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1442 SILC_LOG_DEBUG(("New server id(%s)",
1443 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1445 /* Add the connected router to global server list. Router is sent
1446 as NULL since it's local to us. */
1447 id_entry = silc_idlist_add_server(server->global_list,
1448 strdup(sconn->remote_host),
1450 silc_id_dup(&remote_id.u.server_id,
1454 if (sconn->callback)
1455 (*sconn->callback)(server, NULL, sconn->callback_context);
1456 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1457 silc_server_disconnect_remote(server, sconn->sock,
1458 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1463 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1464 idata = (SilcIDListData)id_entry;
1465 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1466 SILC_IDLIST_STATUS_LOCAL);
1467 idata->sconn = sconn;
1470 server->stat.my_routers++;
1471 if (server->server_type == SILC_ROUTER)
1472 server->stat.routers++;
1473 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1475 if (!sconn->backup) {
1476 /* Mark this router our primary router if we're still standalone */
1477 if (server->standalone) {
1478 SILC_LOG_DEBUG(("This connection is our primary router"));
1479 server->id_entry->router = id_entry;
1480 server->router = id_entry;
1481 server->router->server_type = SILC_ROUTER;
1482 server->standalone = FALSE;
1483 server->backup_primary = FALSE;
1485 /* Announce data if we are not backup router (unless not as primary
1486 currently). Backup router announces later at the end of
1487 resuming protocol. */
1488 if (server->backup_router && server->server_type == SILC_ROUTER) {
1489 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1491 /* If we are router then announce our possible servers. Backup
1492 router announces also global servers. */
1493 if (server->server_type == SILC_ROUTER)
1494 silc_server_announce_servers(server,
1495 server->backup_router ? TRUE : FALSE,
1496 0, SILC_PRIMARY_ROUTE(server));
1498 /* Announce our clients and channels to the router */
1499 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1500 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1503 /* If we are backup router then this primary router is whom we are
1505 if (server->server_type == SILC_BACKUP_ROUTER) {
1506 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1508 NULL, NULL, &ip, NULL);
1509 silc_server_backup_add(server, server->id_entry, ip,
1510 sconn->remote_port, TRUE);
1514 /* We already have primary router. Disconnect this connection */
1515 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1516 silc_idlist_del_server(server->global_list, id_entry);
1517 if (sconn->callback)
1518 (*sconn->callback)(server, NULL, sconn->callback_context);
1519 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1520 silc_server_disconnect_remote(server, sconn->sock,
1521 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1526 /* Add this server to be our backup router */
1527 id_entry->server_type = SILC_BACKUP_ROUTER;
1528 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1529 sconn->backup_replace_port, FALSE);
1535 if (sconn->callback)
1536 (*sconn->callback)(server, NULL, sconn->callback_context);
1537 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1538 silc_server_disconnect_remote(server, sconn->sock,
1539 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1543 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1545 conn = sconn->conn.ref_ptr;
1546 param = &server->config->param;
1547 if (conn && conn->param)
1548 param = conn->param;
1550 /* Register rekey timeout */
1551 sconn->rekey_timeout = param->key_exchange_rekey;
1552 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1553 sconn->sock, sconn->rekey_timeout, 0);
1555 /* Set the entry as packet stream context */
1556 silc_packet_set_context(sconn->sock, id_entry);
1558 /* Call the completion callback to indicate that we've connected to
1560 if (sconn && sconn->callback)
1561 (*sconn->callback)(server, id_entry, sconn->callback_context);
1563 if (sconn == server->router_conn)
1564 server->router_conn = NULL;
1569 /* SKE completion callback */
1571 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1572 SilcSKESecurityProperties prop,
1573 SilcSKEKeyMaterial keymat,
1574 SilcSKERekeyMaterial rekey,
1577 SilcPacketStream sock = context;
1578 SilcUnknownEntry entry = silc_packet_get_context(sock);
1579 SilcServerConnection sconn = entry->data.sconn;
1580 SilcServer server = entry->server;
1581 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1582 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1583 void *auth_data = NULL;
1584 SilcUInt32 auth_data_len = 0;
1585 SilcConnAuth connauth;
1586 SilcCipher send_key, receive_key;
1587 SilcHmac hmac_send, hmac_receive;
1590 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1594 if (status != SILC_SKE_STATUS_OK) {
1596 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1597 silc_ske_map_status(status), entry->hostname, entry->ip));
1599 /* XXX retry connecting */
1601 if (sconn->callback)
1602 (*sconn->callback)(server, NULL, sconn->callback_context);
1603 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1604 silc_server_disconnect_remote(server, sconn->sock,
1605 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1609 SILC_LOG_DEBUG(("Setting keys into use"));
1611 /* Set the keys into use. The data will be encrypted after this. */
1612 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1613 &hmac_send, &hmac_receive, &hash)) {
1615 /* XXX retry connecting */
1617 /* Error setting keys */
1619 if (sconn->callback)
1620 (*sconn->callback)(server, NULL, sconn->callback_context);
1621 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1622 silc_server_disconnect_remote(server, sconn->sock,
1623 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1626 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1627 hmac_receive, FALSE);
1629 SILC_LOG_DEBUG(("Starting connection authentication"));
1631 connauth = silc_connauth_alloc(server->schedule, ske,
1632 server->config->conn_auth_timeout);
1634 /* XXX retry connecting */
1636 /** Error allocating auth protocol */
1638 if (sconn->callback)
1639 (*sconn->callback)(server, NULL, sconn->callback_context);
1640 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1641 silc_server_disconnect_remote(server, sconn->sock,
1642 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1646 /* Get authentication method */
1648 if (conn->passphrase) {
1649 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1650 auth_meth = SILC_AUTH_PUBLIC_KEY;
1651 auth_data = server->private_key;
1653 auth_meth = SILC_AUTH_PASSWORD;
1654 auth_data = conn->passphrase;
1655 auth_data_len = conn->passphrase_len;
1658 auth_meth = SILC_AUTH_PUBLIC_KEY;
1659 auth_data = server->private_key;
1663 entry->data.rekey = rekey;
1665 /* Start connection authentication */
1667 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1668 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1669 auth_data, auth_data_len,
1670 silc_server_ke_auth_compl, sconn);
1673 /* Function that is called when the network connection to a router has
1674 been established. This will continue with the key exchange protocol
1675 with the remote router. */
1677 void silc_server_start_key_exchange(SilcServerConnection sconn)
1679 SilcServer server = sconn->server;
1680 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1681 SilcUnknownEntry entry;
1682 SilcSKEParamsStruct params;
1685 /* Cancel any possible retry timeouts */
1686 silc_schedule_task_del_by_context(server->schedule, sconn);
1688 /* Create packet stream */
1689 sconn->sock = silc_packet_stream_create(server->packet_engine,
1690 server->schedule, sconn->stream);
1692 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1693 silc_stream_destroy(sconn->stream);
1694 if (sconn->callback)
1695 (*sconn->callback)(server, NULL, sconn->callback_context);
1696 silc_server_connection_free(sconn);
1699 server->stat.conn_num++;
1701 /* Set source ID to packet stream */
1702 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1704 if (sconn->callback)
1705 (*sconn->callback)(server, NULL, sconn->callback_context);
1706 silc_packet_stream_destroy(sconn->sock);
1707 silc_server_connection_free(sconn);
1711 /* Create entry for remote entity */
1712 entry = silc_calloc(1, sizeof(*entry));
1714 silc_packet_stream_destroy(sconn->sock);
1715 silc_server_connection_free(sconn);
1718 entry->server = server;
1719 entry->data.sconn = sconn;
1720 silc_packet_set_context(sconn->sock, entry);
1722 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1724 /* Set Key Exchange flags from configuration, but fall back to global
1726 memset(¶ms, 0, sizeof(params));
1727 SILC_GET_SKE_FLAGS(conn, params.flags);
1728 if (server->config->param.key_exchange_pfs)
1729 params.flags |= SILC_SKE_SP_FLAG_PFS;
1731 /* Start SILC Key Exchange protocol */
1732 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1733 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1734 server->public_key, server->private_key, sconn);
1737 if (sconn->callback)
1738 (*sconn->callback)(server, NULL, sconn->callback_context);
1739 silc_packet_stream_destroy(sconn->sock);
1740 silc_server_connection_free(sconn);
1743 silc_ske_set_callbacks(ske, silc_server_verify_key,
1744 silc_server_ke_completed, sconn->sock);
1746 /* Start key exchange protocol */
1747 params.version = silc_version_string;
1748 params.timeout_secs = server->config->key_exchange_timeout;
1749 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1752 /* Timeout callback that will be called to retry connecting to remote
1753 router. This is used by both normal and router server. This will wait
1754 before retrying the connecting. The timeout is generated by exponential
1755 backoff algorithm. */
1757 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1759 SilcServerConnection sconn = context;
1760 SilcServer server = sconn->server;
1761 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1762 SilcServerConfigConnParams *param =
1763 (conn->param ? conn->param : &server->config->param);
1765 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1766 sconn->remote_port));
1768 /* Calculate next timeout */
1769 if (sconn->retry_count >= 1) {
1770 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1771 if (sconn->retry_timeout > param->reconnect_interval_max)
1772 sconn->retry_timeout = param->reconnect_interval_max;
1774 sconn->retry_timeout = param->reconnect_interval;
1776 sconn->retry_count++;
1777 sconn->retry_timeout = sconn->retry_timeout +
1778 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1780 /* If we've reached max retry count, give up. */
1781 if ((sconn->retry_count > param->reconnect_count) &&
1782 !param->reconnect_keep_trying) {
1783 SILC_LOG_ERROR(("Could not connect, giving up"));
1785 if (sconn->callback)
1786 (*sconn->callback)(server, NULL, sconn->callback_context);
1787 silc_server_connection_free(sconn);
1791 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1793 /* We will lookup a fresh pointer later */
1794 silc_server_config_unref(&sconn->conn);
1796 /* Wait before retrying */
1797 silc_schedule_task_del_by_context(server->schedule, sconn);
1798 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1799 sconn, sconn->retry_timeout, 0);
1802 /* Callback for async connection to remote router */
1804 static void silc_server_connection_established(SilcNetStatus status,
1808 SilcServerConnection sconn = context;
1809 SilcServer server = sconn->server;
1811 silc_schedule_task_del_by_context(server->schedule, sconn);
1816 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1817 sconn->remote_host, sconn->remote_port));
1819 /* Continue with key exchange protocol */
1820 sconn->stream = stream;
1821 silc_server_start_key_exchange(sconn);
1824 case SILC_NET_UNKNOWN_IP:
1825 case SILC_NET_UNKNOWN_HOST:
1826 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1827 sconn->remote_host, sconn->remote_port,
1828 silc_net_get_error_string(status)));
1830 if (sconn->callback)
1831 (*sconn->callback)(server, NULL, sconn->callback_context);
1832 silc_server_connection_free(sconn);
1836 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1837 sconn->remote_host, sconn->remote_port,
1838 silc_net_get_error_string(status)));
1839 if (!sconn->no_reconnect) {
1840 silc_schedule_task_add_timeout(sconn->server->schedule,
1841 silc_server_connect_to_router_retry,
1843 silc_dlist_del(server->conns, sconn);
1845 if (sconn->callback)
1846 (*sconn->callback)(server, NULL, sconn->callback_context);
1847 silc_server_connection_free(sconn);
1853 /* Generic routine to use connect to a router. */
1855 SILC_TASK_CALLBACK(silc_server_connect_router)
1857 SilcServerConnection sconn = context;
1858 SilcServer server = sconn->server;
1859 SilcServerConfigRouter *rconn;
1861 silc_schedule_task_del_by_context(server->schedule, sconn);
1863 /* Don't connect if we are shutting down. */
1864 if (server->server_shutdown) {
1865 if (sconn->callback)
1866 (*sconn->callback)(server, NULL, sconn->callback_context);
1867 silc_server_connection_free(sconn);
1871 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1872 (sconn->backup ? "backup router" : "router"),
1873 sconn->remote_host, sconn->remote_port));
1875 if (!sconn->no_conf) {
1876 /* Find connection configuration */
1877 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1878 sconn->remote_port);
1880 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1881 (sconn->backup ? "backup router" : "router"),
1882 sconn->remote_host, sconn->remote_port));
1883 silc_server_connection_free(sconn);
1886 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1889 /* Connect to remote host */
1891 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1892 server->config->server_info->primary->server_ip),
1893 sconn->remote_host, sconn->remote_port,
1894 server->schedule, silc_server_connection_established,
1897 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1898 sconn->remote_host, sconn->remote_port));
1899 silc_server_connection_free(sconn);
1903 /* Add to connection list */
1904 silc_dlist_add(server->conns, sconn);
1907 /* This function connects to our primary router or if we are a router this
1908 establishes all our primary routes. This is called at the start of the
1909 server to do authentication and key exchange with our router - called
1912 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1914 SilcServer server = context;
1915 SilcServerConnection sconn;
1916 SilcServerConfigRouter *ptr;
1918 /* Don't connect if we are shutting down. */
1919 if (server->server_shutdown)
1922 SILC_LOG_DEBUG(("We are %s",
1923 (server->server_type == SILC_SERVER ?
1924 "normal server" : server->server_type == SILC_ROUTER ?
1925 "router" : "backup router/normal server")));
1927 if (!server->config->routers) {
1928 /* There wasn't a configured router, we will continue but we don't
1929 have a connection to outside world. We will be standalone server. */
1930 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1931 server->standalone = TRUE;
1935 /* Cancel any possible retry timeouts */
1936 silc_schedule_task_del_by_callback(server->schedule,
1937 silc_server_connect_router);
1938 silc_schedule_task_del_by_callback(server->schedule,
1939 silc_server_connect_to_router_retry);
1941 /* Create the connections to all our routes */
1942 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1944 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1945 ptr->backup_router ? "Backup router" : "Router",
1946 ptr->initiator ? "Initiator" : "Responder",
1947 ptr->host, ptr->port));
1949 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1950 ptr->initiator == FALSE && !server->backup_router &&
1951 !silc_server_config_get_backup_router(server))
1952 server->wait_backup = TRUE;
1954 if (!ptr->initiator)
1956 if (ptr->dynamic_connection)
1959 /* Check whether we are connecting or connected to this host already */
1960 if (silc_server_num_sockets_by_remote(server,
1961 silc_net_is_ip(ptr->host) ?
1963 silc_net_is_ip(ptr->host) ?
1964 NULL : ptr->host, ptr->port,
1965 SILC_CONN_ROUTER)) {
1966 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1967 ptr->host, ptr->port));
1969 /* If we don't have primary router and this connection is our
1970 primary router we are in desync. Reconnect to the primary. */
1971 if (server->standalone && !server->router) {
1973 SilcPacketStream sock;
1974 SilcServerConfigRouter *primary =
1975 silc_server_config_get_primary_router(server);
1978 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1979 ptr->host, ptr->port);
1982 server->backup_noswitch = TRUE;
1983 silc_server_free_sock_user_data(server, sock, NULL);
1984 silc_server_disconnect_remote(server, sock, 0, NULL);
1985 server->backup_noswitch = FALSE;
1986 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1992 /* Allocate connection object for hold connection specific stuff. */
1993 sconn = silc_calloc(1, sizeof(*sconn));
1996 sconn->server = server;
1997 sconn->remote_host = strdup(ptr->host);
1998 sconn->remote_port = ptr->port;
1999 sconn->backup = ptr->backup_router;
2000 if (sconn->backup) {
2001 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2002 sconn->backup_replace_port = ptr->backup_replace_port;
2005 SILC_LOG_DEBUG(("Created connection %p", sconn));
2007 if (!server->router_conn && !sconn->backup)
2008 server->router_conn = sconn;
2011 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2017 /************************ Accepting new connection **************************/
2019 /* After this is called, server don't wait for backup router anymore.
2020 This gets called automatically even after we have backup router
2021 connection established. */
2023 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2025 SilcServer server = context;
2026 server->wait_backup = FALSE;
2029 /* Authentication data callback */
2032 silc_server_accept_get_auth(SilcConnAuth connauth,
2033 SilcConnectionType conn_type,
2034 unsigned char **passphrase,
2035 SilcUInt32 *passphrase_len,
2036 SilcSKR *repository,
2039 SilcPacketStream sock = context;
2040 SilcUnknownEntry entry = silc_packet_get_context(sock);
2041 SilcServer server = entry->server;
2043 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2045 /* Remote end is client */
2046 if (conn_type == SILC_CONN_CLIENT) {
2047 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2051 *passphrase = cconfig->passphrase;
2052 *passphrase_len = cconfig->passphrase_len;
2053 if (cconfig->publickeys)
2054 *repository = server->repository;
2056 if (cconfig->publickeys) {
2057 if (server->config->prefer_passphrase_auth) {
2061 *passphrase_len = 0;
2065 entry->conn_type = conn_type;
2069 /* Remote end is server */
2070 if (conn_type == SILC_CONN_SERVER) {
2071 SilcServerConfigServer *sconfig;
2073 /* If we are normal server, don't accept the connection */
2074 if (server->server_type == SILC_SERVER)
2077 sconfig = entry->sconfig.ref_ptr;
2081 *passphrase = sconfig->passphrase;
2082 *passphrase_len = sconfig->passphrase_len;
2083 if (sconfig->publickeys)
2084 *repository = server->repository;
2086 if (sconfig->publickeys) {
2087 if (server->config->prefer_passphrase_auth) {
2091 *passphrase_len = 0;
2095 entry->conn_type = conn_type;
2099 /* Remote end is router */
2100 if (conn_type == SILC_CONN_ROUTER) {
2101 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2105 *passphrase = rconfig->passphrase;
2106 *passphrase_len = rconfig->passphrase_len;
2107 if (rconfig->publickeys)
2108 *repository = server->repository;
2110 if (rconfig->publickeys) {
2111 if (server->config->prefer_passphrase_auth) {
2115 *passphrase_len = 0;
2119 entry->conn_type = conn_type;
2126 /* Authentication completion callback. */
2129 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2132 SilcPacketStream sock = context;
2133 SilcUnknownEntry entry = silc_packet_get_context(sock);
2134 SilcIDListData idata = (SilcIDListData)entry;
2135 SilcServer server = entry->server;
2136 SilcServerConfigConnParams *param = &server->config->param;
2137 SilcServerConnection sconn;
2139 const char *hostname, *ip;
2143 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2144 NULL, &hostname, &ip, &port);
2146 if (success == FALSE) {
2147 /* Authentication failed */
2148 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2149 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2150 server->stat.auth_failures++;
2151 silc_server_disconnect_remote(server, sock,
2152 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2153 silc_server_config_unref(&entry->cconfig);
2154 silc_server_config_unref(&entry->sconfig);
2155 silc_server_config_unref(&entry->rconfig);
2156 silc_server_free_sock_user_data(server, sock, NULL);
2160 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2162 switch (entry->conn_type) {
2163 case SILC_CONN_CLIENT:
2165 SilcClientEntry client;
2166 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2168 /* Verify whether this connection is after all allowed to connect */
2169 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2170 &server->config->param,
2172 silc_connauth_get_ske(connauth))) {
2173 server->stat.auth_failures++;
2177 /* If we are primary router and we have backup router configured
2178 but it has not connected to use yet, do not accept any other
2180 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2181 !server->backup_router) {
2182 SilcServerConfigRouter *router;
2183 router = silc_server_config_get_backup_router(server);
2184 if (router && strcmp(server->config->server_info->primary->server_ip,
2186 silc_server_find_socket_by_host(server,
2188 router->backup_replace_ip, 0)) {
2189 SILC_LOG_INFO(("Will not accept connections because we do "
2190 "not have backup router connection established"));
2191 silc_server_disconnect_remote(server, sock,
2192 SILC_STATUS_ERR_PERM_DENIED,
2193 "We do not have connection to backup "
2194 "router established, try later");
2195 silc_server_config_unref(&entry->cconfig);
2196 silc_server_config_unref(&entry->sconfig);
2197 silc_server_config_unref(&entry->rconfig);
2198 silc_server_free_sock_user_data(server, sock, NULL);
2199 server->stat.auth_failures++;
2201 /* From here on, wait 20 seconds for the backup router to appear. */
2202 silc_schedule_task_add_timeout(server->schedule,
2203 silc_server_backup_router_wait,
2204 (void *)server, 20, 0);
2209 SILC_LOG_DEBUG(("Remote host is client"));
2210 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2213 /* Add the client to the client ID cache. The nickname and Client ID
2214 and other information is created after we have received NEW_CLIENT
2215 packet from client. */
2216 client = silc_idlist_add_client(server->local_list,
2217 NULL, NULL, NULL, NULL, NULL, sock);
2219 SILC_LOG_ERROR(("Could not add new client to cache"));
2220 server->stat.auth_failures++;
2221 silc_server_disconnect_remote(server, sock,
2222 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2223 silc_server_config_unref(&entry->cconfig);
2224 silc_server_config_unref(&entry->sconfig);
2225 silc_server_config_unref(&entry->rconfig);
2226 silc_server_free_sock_user_data(server, sock, NULL);
2229 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2230 entry->data.conn_type = SILC_CONN_CLIENT;
2233 server->stat.my_clients++;
2234 server->stat.clients++;
2235 server->stat.cell_clients++;
2237 /* Get connection parameters */
2239 param = conn->param;
2241 if (!param->keepalive_secs)
2242 param->keepalive_secs = server->config->param.keepalive_secs;
2244 if (!param->qos && server->config->param.qos) {
2245 param->qos = server->config->param.qos;
2246 param->qos_rate_limit = server->config->param.qos_rate_limit;
2247 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2248 param->qos_limit_sec = server->config->param.qos_limit_sec;
2249 param->qos_limit_usec = server->config->param.qos_limit_usec;
2252 /* Check if to be anonymous connection */
2253 if (param->anonymous)
2254 client->mode |= SILC_UMODE_ANONYMOUS;
2257 /* Add public key to repository */
2258 SILC_LOG_DEBUG(("Add client public key to repository"));
2259 if (!silc_server_get_public_key_by_client(server, client, NULL))
2260 silc_skr_add_public_key_simple(server->repository,
2261 entry->data.public_key,
2262 SILC_SKR_USAGE_IDENTIFICATION, client,
2265 id_entry = (void *)client;
2269 case SILC_CONN_SERVER:
2270 case SILC_CONN_ROUTER:
2272 SilcServerEntry new_server;
2273 SilcBool initiator = FALSE;
2274 SilcBool backup_local = FALSE;
2275 SilcBool backup_router = FALSE;
2276 char *backup_replace_ip = NULL;
2277 SilcUInt16 backup_replace_port = 0;
2278 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2279 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2281 /* If we are backup router and this is incoming server connection
2282 and we do not have connection to primary router, do not allow
2284 if (server->server_type == SILC_BACKUP_ROUTER &&
2285 entry->conn_type == SILC_CONN_SERVER &&
2286 !SILC_PRIMARY_ROUTE(server)) {
2287 SILC_LOG_INFO(("Will not accept server connection because we do "
2288 "not have primary router connection established"));
2289 silc_server_disconnect_remote(server, sock,
2290 SILC_STATUS_ERR_PERM_DENIED,
2291 "We do not have connection to primary "
2292 "router established, try later");
2293 silc_server_config_unref(&entry->cconfig);
2294 silc_server_config_unref(&entry->sconfig);
2295 silc_server_config_unref(&entry->rconfig);
2296 silc_server_free_sock_user_data(server, sock, NULL);
2297 server->stat.auth_failures++;
2301 if (entry->conn_type == SILC_CONN_ROUTER) {
2302 /* Verify whether this connection is after all allowed to connect */
2303 if (!silc_server_connection_allowed(server, sock,
2305 &server->config->param,
2306 rconn ? rconn->param : NULL,
2307 silc_connauth_get_ske(connauth))) {
2308 silc_server_config_unref(&entry->cconfig);
2309 silc_server_config_unref(&entry->sconfig);
2310 silc_server_config_unref(&entry->rconfig);
2311 server->stat.auth_failures++;
2317 param = rconn->param;
2319 if (!param->keepalive_secs)
2320 param->keepalive_secs = server->config->param.keepalive_secs;
2322 if (!param->qos && server->config->param.qos) {
2323 param->qos = server->config->param.qos;
2324 param->qos_rate_limit = server->config->param.qos_rate_limit;
2325 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2326 param->qos_limit_sec = server->config->param.qos_limit_sec;
2327 param->qos_limit_usec = server->config->param.qos_limit_usec;
2331 initiator = rconn->initiator;
2332 backup_local = rconn->backup_local;
2333 backup_router = rconn->backup_router;
2334 backup_replace_ip = rconn->backup_replace_ip;
2335 backup_replace_port = rconn->backup_replace_port;
2339 if (entry->conn_type == SILC_CONN_SERVER) {
2340 /* Verify whether this connection is after all allowed to connect */
2341 if (!silc_server_connection_allowed(server, sock,
2343 &server->config->param,
2344 srvconn ? srvconn->param : NULL,
2345 silc_connauth_get_ske(connauth))) {
2346 server->stat.auth_failures++;
2350 if (srvconn->param) {
2351 param = srvconn->param;
2353 if (!param->keepalive_secs)
2354 param->keepalive_secs = server->config->param.keepalive_secs;
2356 if (!param->qos && server->config->param.qos) {
2357 param->qos = server->config->param.qos;
2358 param->qos_rate_limit = server->config->param.qos_rate_limit;
2359 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2360 param->qos_limit_sec = server->config->param.qos_limit_sec;
2361 param->qos_limit_usec = server->config->param.qos_limit_usec;
2365 backup_router = srvconn->backup_router;
2369 /* If we are primary router and we have backup router configured
2370 but it has not connected to use yet, do not accept any other
2372 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2373 !server->backup_router && !backup_router) {
2374 SilcServerConfigRouter *router;
2375 router = silc_server_config_get_backup_router(server);
2376 if (router && strcmp(server->config->server_info->primary->server_ip,
2378 silc_server_find_socket_by_host(server,
2380 router->backup_replace_ip, 0)) {
2381 SILC_LOG_INFO(("Will not accept connections because we do "
2382 "not have backup router connection established"));
2383 silc_server_disconnect_remote(server, sock,
2384 SILC_STATUS_ERR_PERM_DENIED,
2385 "We do not have connection to backup "
2386 "router established, try later");
2387 silc_server_config_unref(&entry->cconfig);
2388 silc_server_config_unref(&entry->sconfig);
2389 silc_server_config_unref(&entry->rconfig);
2390 silc_server_free_sock_user_data(server, sock, NULL);
2391 server->stat.auth_failures++;
2393 /* From here on, wait 20 seconds for the backup router to appear. */
2394 silc_schedule_task_add_timeout(server->schedule,
2395 silc_server_backup_router_wait,
2396 (void *)server, 20, 0);
2401 SILC_LOG_DEBUG(("Remote host is %s",
2402 entry->conn_type == SILC_CONN_SERVER ?
2403 "server" : (backup_router ?
2404 "backup router" : "router")));
2405 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2406 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2407 "server" : (backup_router ?
2408 "backup router" : "router")));
2410 /* Add the server into server cache. The server name and Server ID
2411 is updated after we have received NEW_SERVER packet from the
2412 server. We mark ourselves as router for this server if we really
2415 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2416 server->local_list : (backup_router ?
2417 server->local_list :
2418 server->global_list)),
2420 (entry->conn_type == SILC_CONN_SERVER ?
2421 SILC_SERVER : SILC_ROUTER),
2423 (entry->conn_type == SILC_CONN_SERVER ?
2424 server->id_entry : (backup_router ?
2425 server->id_entry : NULL)),
2428 SILC_LOG_ERROR(("Could not add new server to cache"));
2429 silc_server_disconnect_remote(server, sock,
2430 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2431 silc_server_config_unref(&entry->cconfig);
2432 silc_server_config_unref(&entry->sconfig);
2433 silc_server_config_unref(&entry->rconfig);
2434 silc_server_free_sock_user_data(server, sock, NULL);
2435 server->stat.auth_failures++;
2438 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2439 entry->data.conn_type = entry->conn_type;
2441 id_entry = (void *)new_server;
2443 /* If the incoming connection is router and marked as backup router
2444 then add it to be one of our backups */
2445 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2446 /* Change it back to SERVER type since that's what it really is. */
2448 entry->data.conn_type = SILC_CONN_SERVER;
2449 new_server->server_type = SILC_BACKUP_ROUTER;
2451 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2452 ("Backup router %s is now online",
2455 /* Remove the backup waiting with timeout */
2456 silc_schedule_task_add_timeout(server->schedule,
2457 silc_server_backup_router_wait,
2458 (void *)server, 10, 0);
2462 if (entry->data.conn_type == SILC_CONN_SERVER) {
2463 server->stat.my_servers++;
2464 server->stat.servers++;
2465 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2467 server->stat.my_routers++;
2468 server->stat.routers++;
2469 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2472 /* Check whether this connection is to be our primary router connection
2473 if we do not already have the primary route. */
2474 if (!backup_router &&
2475 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2476 if (silc_server_config_is_primary_route(server) && !initiator)
2479 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2480 server->standalone = FALSE;
2481 if (!server->id_entry->router) {
2482 server->id_entry->router = id_entry;
2483 server->router = id_entry;
2495 /* Add connection to server->conns so that we know we have connection
2497 sconn = silc_calloc(1, sizeof(*sconn));
2498 sconn->server = server;
2500 sconn->remote_host = strdup(hostname);
2501 sconn->remote_port = port;
2502 silc_dlist_add(server->conns, sconn);
2503 idata->sconn = sconn;
2504 idata->last_receive = time(NULL);
2506 /* Add the common data structure to the ID entry. */
2507 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2508 silc_packet_set_context(sock, id_entry);
2510 /* Connection has been fully established now. Everything is ok. */
2511 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2513 /* Perform Quality of Service */
2515 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2516 param->qos_rate_limit, param->qos_bytes_limit,
2517 param->qos_limit_sec, param->qos_limit_usec);
2519 silc_server_config_unref(&entry->cconfig);
2520 silc_server_config_unref(&entry->sconfig);
2521 silc_server_config_unref(&entry->rconfig);
2525 silc_ske_free(silc_connauth_get_ske(connauth));
2526 silc_connauth_free(connauth);
2529 /* SKE completion callback. We set the new keys into use here. */
2532 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2533 SilcSKESecurityProperties prop,
2534 SilcSKEKeyMaterial keymat,
2535 SilcSKERekeyMaterial rekey,
2538 SilcPacketStream sock = context;
2539 SilcUnknownEntry entry = silc_packet_get_context(sock);
2540 SilcIDListData idata = (SilcIDListData)entry;
2541 SilcServer server = entry->server;
2542 SilcConnAuth connauth;
2543 SilcCipher send_key, receive_key;
2544 SilcHmac hmac_send, hmac_receive;
2551 if (status != SILC_SKE_STATUS_OK) {
2553 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2554 silc_ske_map_status(status), entry->hostname, entry->ip));
2556 silc_server_disconnect_remote(server, sock,
2557 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2558 silc_server_config_unref(&entry->cconfig);
2559 silc_server_config_unref(&entry->sconfig);
2560 silc_server_config_unref(&entry->rconfig);
2561 silc_server_free_sock_user_data(server, sock, NULL);
2565 SILC_LOG_DEBUG(("Setting keys into use"));
2567 /* Set the keys into use. The data will be encrypted after this. */
2568 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2569 &hmac_send, &hmac_receive, &hash)) {
2570 /* Error setting keys */
2572 silc_server_disconnect_remote(server, sock,
2573 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2574 silc_server_free_sock_user_data(server, sock, NULL);
2577 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2578 hmac_receive, FALSE);
2580 idata->rekey = rekey;
2581 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2582 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2583 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2585 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2587 SILC_LOG_DEBUG(("Starting connection authentication"));
2588 server->stat.auth_attempts++;
2590 connauth = silc_connauth_alloc(server->schedule, ske,
2591 server->config->conn_auth_timeout);
2593 /** Error allocating auth protocol */
2595 silc_server_disconnect_remote(server, sock,
2596 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2597 silc_server_config_unref(&entry->cconfig);
2598 silc_server_config_unref(&entry->sconfig);
2599 silc_server_config_unref(&entry->rconfig);
2600 silc_server_free_sock_user_data(server, sock, NULL);
2604 /* Start connection authentication */
2606 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2607 silc_server_accept_auth_compl, sock);
2610 /* Accept new TCP connection */
2612 static void silc_server_accept_new_connection(SilcNetStatus status,
2616 SilcServer server = context;
2617 SilcPacketStream packet_stream;
2618 SilcServerConfigClient *cconfig = NULL;
2619 SilcServerConfigServer *sconfig = NULL;
2620 SilcServerConfigRouter *rconfig = NULL;
2621 SilcServerConfigDeny *deny;
2622 SilcUnknownEntry entry;
2624 SilcSKEParamsStruct params;
2625 char *hostname, *ip;
2628 SILC_LOG_DEBUG(("Accepting new connection"));
2630 /* Check for maximum allowed connections */
2631 server->stat.conn_attempts++;
2632 if (silc_dlist_count(server->conns) >
2633 server->config->param.connections_max) {
2634 SILC_LOG_ERROR(("Refusing connection, server is full"));
2635 server->stat.conn_failures++;
2636 silc_stream_destroy(stream);
2640 /* Get hostname, IP and port */
2641 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2642 (const char **)&ip, &port)) {
2643 /* Bad socket stream */
2644 server->stat.conn_failures++;
2645 silc_stream_destroy(stream);
2649 /* Create packet stream */
2650 packet_stream = silc_packet_stream_create(server->packet_engine,
2651 server->schedule, stream);
2652 if (!packet_stream) {
2653 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2654 server->stat.conn_failures++;
2655 silc_stream_destroy(stream);
2658 server->stat.conn_num++;
2660 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2662 /* Set source ID to packet stream */
2663 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2666 server->stat.conn_failures++;
2667 silc_packet_stream_destroy(packet_stream);
2671 /* Check whether this connection is denied to connect to us. */
2672 deny = silc_server_config_find_denied(server, ip);
2674 deny = silc_server_config_find_denied(server, hostname);
2676 /* The connection is denied */
2677 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2678 silc_server_disconnect_remote(server, packet_stream,
2679 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2681 silc_server_free_sock_user_data(server, packet_stream, NULL);
2685 /* Check whether we have configured this sort of connection at all. We
2686 have to check all configurations since we don't know what type of
2687 connection this is. */
2688 if (!(cconfig = silc_server_config_find_client(server, ip)))
2689 cconfig = silc_server_config_find_client(server, hostname);
2690 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2691 sconfig = silc_server_config_find_server_conn(server, hostname);
2692 if (server->server_type == SILC_ROUTER)
2693 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2694 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2695 if (!cconfig && !sconfig && !rconfig) {
2696 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2697 server->stat.conn_failures++;
2698 silc_server_disconnect_remote(server, packet_stream,
2699 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2700 silc_server_free_sock_user_data(server, packet_stream, NULL);
2704 /* The connection is allowed */
2705 entry = silc_calloc(1, sizeof(*entry));
2707 server->stat.conn_failures++;
2708 silc_server_disconnect_remote(server, packet_stream,
2709 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2710 silc_server_free_sock_user_data(server, packet_stream, NULL);
2713 entry->hostname = hostname;
2716 entry->server = server;
2717 entry->data.conn_type = SILC_CONN_UNKNOWN;
2718 silc_packet_set_context(packet_stream, entry);
2720 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2722 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2723 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2724 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2726 /* Take flags for key exchange. Since we do not know what type of connection
2727 this is, we go through all found configurations and use the global ones
2728 as well. This will result always into strictest key exchange flags. */
2729 memset(¶ms, 0, sizeof(params));
2730 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2731 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2732 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2733 if (server->config->param.key_exchange_pfs)
2734 params.flags |= SILC_SKE_SP_FLAG_PFS;
2736 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2737 server->stat.conn_attempts++;
2739 /* Start SILC Key Exchange protocol */
2740 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2741 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2742 server->public_key, server->private_key,
2745 server->stat.conn_failures++;
2746 silc_server_disconnect_remote(server, packet_stream,
2747 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2748 silc_server_free_sock_user_data(server, packet_stream, NULL);
2751 silc_ske_set_callbacks(ske, silc_server_verify_key,
2752 silc_server_accept_completed, packet_stream);
2754 /* Start key exchange protocol */
2755 params.version = silc_version_string;
2756 params.timeout_secs = server->config->key_exchange_timeout;
2757 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2761 /********************************** Rekey ***********************************/
2763 /* Initiator rekey completion callback */
2765 static void silc_server_rekey_completion(SilcSKE ske,
2766 SilcSKEStatus status,
2767 const SilcSKESecurityProperties prop,
2768 const SilcSKEKeyMaterial keymat,
2769 SilcSKERekeyMaterial rekey,
2772 SilcPacketStream sock = context;
2773 SilcIDListData idata = silc_packet_get_context(sock);
2774 SilcServer server = idata->sconn->server;
2776 idata->sconn->op = NULL;
2777 if (status != SILC_SKE_STATUS_OK) {
2778 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2779 idata->sconn->remote_host));
2783 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2784 idata->sconn->remote_host, idata->sconn->remote_port,
2785 SILC_CONNTYPE_STRING(idata->conn_type)));
2787 /* Save rekey data for next rekey */
2788 idata->rekey = rekey;
2790 /* Register new rekey timeout */
2791 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2792 sock, idata->sconn->rekey_timeout, 0);
2795 /* Rekey callback. Start rekey as initiator */
2797 SILC_TASK_CALLBACK(silc_server_do_rekey)
2799 SilcServer server = app_context;
2800 SilcPacketStream sock = context;
2801 SilcIDListData idata = silc_packet_get_context(sock);
2804 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2806 /* Do not execute rekey with disabled connections */
2807 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2810 /* If another protocol is active do not start rekey */
2811 if (idata->sconn->op) {
2812 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2813 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2818 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2819 idata->sconn->remote_host, idata->sconn->remote_port,
2820 SILC_CONNTYPE_STRING(idata->conn_type)));
2823 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2824 server->public_key, NULL, sock);
2828 /* Set SKE callbacks */
2829 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2832 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2835 /* Responder rekey completion callback */
2838 silc_server_rekey_resp_completion(SilcSKE ske,
2839 SilcSKEStatus status,
2840 const SilcSKESecurityProperties prop,
2841 const SilcSKEKeyMaterial keymat,
2842 SilcSKERekeyMaterial rekey,
2845 SilcPacketStream sock = context;
2846 SilcIDListData idata = silc_packet_get_context(sock);
2848 idata->sconn->op = NULL;
2849 if (status != SILC_SKE_STATUS_OK) {
2850 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2851 idata->sconn->remote_host));
2855 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2856 idata->sconn->remote_host, idata->sconn->remote_port,
2857 SILC_CONNTYPE_STRING(idata->conn_type)));
2859 /* Save rekey data for next rekey */
2860 idata->rekey = rekey;
2863 /* Start rekey as responder */
2865 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2868 SilcIDListData idata = silc_packet_get_context(sock);
2871 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2872 idata->sconn->remote_host, idata->sconn->remote_port,
2873 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2876 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2877 server->public_key, NULL, sock);
2879 silc_packet_free(packet);
2883 /* Set SKE callbacks */
2884 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2887 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2892 /****************************** Disconnection *******************************/
2894 /* Destroys packet stream. */
2896 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2898 silc_packet_stream_unref(context);
2901 /* Closes connection to socket connection */
2903 void silc_server_close_connection(SilcServer server,
2904 SilcPacketStream sock)
2906 SilcIDListData idata = silc_packet_get_context(sock);
2908 const char *hostname;
2911 if (!silc_packet_stream_is_valid(sock))
2914 memset(tmp, 0, sizeof(tmp));
2915 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2916 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2917 NULL, &hostname, NULL, &port);
2918 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2919 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2920 tmp[0] ? tmp : ""));
2922 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2924 if (idata && idata->sconn) {
2925 silc_server_connection_free(idata->sconn);
2926 idata->sconn = NULL;
2929 /* Take a reference and then destroy the stream. The last reference
2930 is released later in a timeout callback. */
2931 silc_packet_stream_ref(sock);
2932 silc_packet_stream_destroy(sock);
2934 /* Close connection with timeout */
2935 server->stat.conn_num--;
2936 silc_schedule_task_del_by_all(server->schedule, 0,
2937 silc_server_close_connection_final, sock);
2938 silc_schedule_task_add_timeout(server->schedule,
2939 silc_server_close_connection_final,
2943 /* Sends disconnect message to remote connection and disconnects the
2946 void silc_server_disconnect_remote(SilcServer server,
2947 SilcPacketStream sock,
2948 SilcStatus status, ...)
2950 unsigned char buf[512];
2957 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
2959 va_start(ap, status);
2960 cp = va_arg(ap, char *);
2962 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2965 /* Send SILC_PACKET_DISCONNECT */
2966 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2967 SILC_STR_UI_CHAR(status),
2968 SILC_STR_UI8_STRING(cp ? buf : NULL),
2971 /* Close connection */
2972 silc_server_close_connection(server, sock);
2975 /* Frees client data and notifies about client's signoff. */
2977 void silc_server_free_client_data(SilcServer server,
2978 SilcPacketStream sock,
2979 SilcClientEntry client,
2981 const char *signoff)
2983 SILC_LOG_DEBUG(("Freeing client %p data", client));
2986 /* Check if anyone is watching this nickname */
2987 if (server->server_type == SILC_ROUTER)
2988 silc_server_check_watcher_list(server, client, NULL,
2989 SILC_NOTIFY_TYPE_SIGNOFF);
2991 /* Send SIGNOFF notify to routers. */
2993 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2994 SILC_BROADCAST(server), client->id,
2998 /* Remove client from all channels */
3000 silc_server_remove_from_channels(server, NULL, client,
3001 TRUE, (char *)signoff, TRUE, FALSE);
3003 silc_server_remove_from_channels(server, NULL, client,
3004 FALSE, NULL, FALSE, FALSE);
3006 /* Remove this client from watcher list if it is */
3007 silc_server_del_from_watcher_list(server, client);
3009 /* Remove client's public key from repository, this will free it too. */
3010 if (client->data.public_key) {
3011 silc_skr_del_public_key(server->repository, client->data.public_key,
3013 client->data.public_key = NULL;
3016 /* Update statistics */
3017 server->stat.my_clients--;
3018 server->stat.clients--;
3019 if (server->stat.cell_clients)
3020 server->stat.cell_clients--;
3021 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3022 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3023 silc_schedule_task_del_by_context(server->schedule, client);
3025 if (client->data.sconn) {
3026 silc_server_connection_free(client->data.sconn);
3027 client->data.sconn = NULL;
3030 /* We will not delete the client entry right away. We will take it
3031 into history (for WHOWAS command) for 5 minutes, unless we're
3032 shutting down server. */
3033 if (!server->server_shutdown) {
3034 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3036 client->router = NULL;
3037 client->connection = NULL;
3038 client->data.created = silc_time();
3039 silc_dlist_add(server->expired_clients, client);
3041 /* Delete directly since we're shutting down server */
3042 SILC_LOG_DEBUG(("Delete client directly"));
3043 silc_idlist_del_data(client);
3044 silc_idlist_del_client(server->local_list, client);
3048 /* Frees user_data pointer from socket connection object. This also sends
3049 appropriate notify packets to the network to inform about leaving
3052 void silc_server_free_sock_user_data(SilcServer server,
3053 SilcPacketStream sock,
3054 const char *signoff_message)
3056 SilcIDListData idata;
3063 SILC_LOG_DEBUG(("Start, sock %p", sock));
3065 idata = silc_packet_get_context(sock);
3069 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3072 /* Cancel active protocols */
3074 if (idata->sconn && idata->sconn->op) {
3075 SILC_LOG_DEBUG(("Abort active protocol"));
3076 silc_async_abort(idata->sconn->op, NULL, NULL);
3078 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3079 ((SilcUnknownEntry)idata)->op) {
3080 SILC_LOG_DEBUG(("Abort active protocol"));
3081 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3085 switch (idata->conn_type) {
3086 case SILC_CONN_CLIENT:
3088 SilcClientEntry client_entry = (SilcClientEntry)idata;
3089 silc_server_free_client_data(server, sock, client_entry, TRUE,
3091 silc_packet_set_context(sock, NULL);
3095 case SILC_CONN_SERVER:
3096 case SILC_CONN_ROUTER:
3098 SilcServerEntry user_data = (SilcServerEntry)idata;
3099 SilcServerEntry backup_router = NULL;
3101 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3104 backup_router = silc_server_backup_get(server, user_data->id);
3106 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3107 backup_router == server->id_entry &&
3108 idata->conn_type != SILC_CONN_ROUTER)
3109 backup_router = NULL;
3111 if (server->server_shutdown || server->backup_noswitch)
3112 backup_router = NULL;
3114 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3115 NULL, NULL, &ip, &port);
3117 /* If this was our primary router connection then we're lost to
3118 the outside world. */
3119 if (server->router == user_data) {
3120 /* Check whether we have a backup router connection */
3121 if (!backup_router || backup_router == user_data) {
3122 if (!server->no_reconnect)
3123 silc_server_create_connections(server);
3124 server->id_entry->router = NULL;
3125 server->router = NULL;
3126 server->standalone = TRUE;
3127 server->backup_primary = FALSE;
3128 backup_router = NULL;
3130 if (server->id_entry != backup_router) {
3131 SILC_LOG_INFO(("New primary router is backup router %s",
3132 backup_router->server_name));
3133 server->id_entry->router = backup_router;
3134 server->router = backup_router;
3135 server->router_connect = time(0);
3136 server->backup_primary = TRUE;
3137 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3139 /* Send START_USE to backup router to indicate we have switched */
3140 silc_server_backup_send_start_use(server,
3141 backup_router->connection,
3144 SILC_LOG_INFO(("We are now new primary router in this cell"));
3145 server->id_entry->router = NULL;
3146 server->router = NULL;
3147 server->standalone = TRUE;
3150 /* We stop here to take a breath */
3153 if (server->backup_router) {
3154 server->server_type = SILC_ROUTER;
3156 /* We'll need to constantly try to reconnect to the primary
3157 router so that we'll see when it comes back online. */
3158 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3159 silc_server_backup_connected,
3163 /* Mark this connection as replaced */
3164 silc_server_backup_replaced_add(server, user_data->id,
3167 } else if (backup_router) {
3168 SILC_LOG_INFO(("Enabling the use of backup router %s",
3169 backup_router->server_name));
3171 /* Mark this connection as replaced */
3172 silc_server_backup_replaced_add(server, user_data->id,
3174 } else if (server->server_type == SILC_SERVER &&
3175 idata->conn_type == SILC_CONN_ROUTER) {
3176 /* Reconnect to the router (backup) */
3177 if (!server->no_reconnect)
3178 silc_server_create_connections(server);
3181 if (user_data->server_name)
3182 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3183 ("Server %s signoff", user_data->server_name));
3185 if (!backup_router) {
3186 /* Remove all servers that are originated from this server, and
3187 remove the clients of those servers too. */
3188 silc_server_remove_servers_by_server(server, user_data, TRUE);
3191 /* Remove the clients that this server owns as they will become
3192 invalid now too. For backup router the server is actually
3193 coming from the primary router, so mark that as the owner
3195 if (server->server_type == SILC_BACKUP_ROUTER &&
3196 sock->type == SILC_CONN_SERVER)
3197 silc_server_remove_clients_by_server(server, server->router,
3201 silc_server_remove_clients_by_server(server, user_data,
3204 /* Remove channels owned by this server */
3205 if (server->server_type == SILC_SERVER)
3206 silc_server_remove_channels_by_server(server, user_data);
3208 /* Enable local server connections that may be disabled */
3209 silc_server_local_servers_toggle_enabled(server, TRUE);
3211 /* Update the client entries of this server to the new backup
3212 router. If we are the backup router we also resolve the real
3213 servers for the clients. After updating is over this also
3214 removes the clients that this server explicitly owns. */
3215 silc_server_update_clients_by_server(server, user_data,
3216 backup_router, TRUE);
3218 /* If we are router and just lost our primary router (now standlaone)
3219 we remove everything that was behind it, since we don't know
3221 if (server->server_type == SILC_ROUTER && server->standalone)
3222 /* Remove all servers that are originated from this server, and
3223 remove the clients of those servers too. */
3224 silc_server_remove_servers_by_server(server, user_data, TRUE);
3226 /* Finally remove the clients that are explicitly owned by this
3227 server. They go down with the server. */
3228 silc_server_remove_clients_by_server(server, user_data,
3231 /* Update our server cache to use the new backup router too. */
3232 silc_server_update_servers_by_server(server, user_data, backup_router);
3233 if (server->server_type == SILC_SERVER)
3234 silc_server_update_channels_by_server(server, user_data,
3237 /* Send notify about primary router going down to local operators */
3238 if (server->backup_router)
3239 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3240 SILC_NOTIFY_TYPE_NONE,
3241 ("%s switched to backup router %s "
3242 "(we are primary router now)",
3243 server->server_name, server->server_name));
3244 else if (server->router)
3245 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3246 SILC_NOTIFY_TYPE_NONE,
3247 ("%s switched to backup router %s",
3248 server->server_name,
3249 server->router->server_name));
3251 server->backup_noswitch = FALSE;
3254 silc_server_connection_free(idata->sconn);
3255 idata->sconn = NULL;
3259 if (idata->conn_type == SILC_CONN_SERVER) {
3260 server->stat.my_servers--;
3261 server->stat.servers--;
3262 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3263 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3264 server->stat.my_routers--;
3265 server->stat.routers--;
3266 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3268 if (server->server_type == SILC_ROUTER)
3269 server->stat.cell_servers--;
3271 /* Free the server entry */
3272 silc_server_backup_del(server, user_data);
3273 silc_server_backup_replaced_del(server, user_data);
3274 silc_idlist_del_data(user_data);
3275 if (!silc_idlist_del_server(server->local_list, user_data))
3276 silc_idlist_del_server(server->global_list, user_data);
3278 if (backup_router && backup_router != server->id_entry) {
3279 /* Announce all of our stuff that was created about 5 minutes ago.
3280 The backup router knows all the other stuff already. */
3281 if (server->server_type == SILC_ROUTER)
3282 silc_server_announce_servers(server, FALSE, time(0) - 300,
3283 backup_router->connection);
3285 /* Announce our clients and channels to the router */
3286 silc_server_announce_clients(server, time(0) - 300,
3287 backup_router->connection);
3288 silc_server_announce_channels(server, time(0) - 300,
3289 backup_router->connection);
3292 silc_packet_set_context(sock, NULL);
3298 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3300 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3303 if (server->router_conn == idata->sconn) {
3304 if (!server->no_reconnect)
3305 silc_server_create_connections(server);
3306 server->router_conn = NULL;
3309 silc_server_connection_free(idata->sconn);
3310 idata->sconn = NULL;
3312 silc_idlist_del_data(idata);
3314 silc_packet_set_context(sock, NULL);
3320 /* Removes client from all channels it has joined. This is used when client
3321 connection is disconnected. If the client on a channel is last, the
3322 channel is removed as well. This sends the SIGNOFF notify types. */
3324 void silc_server_remove_from_channels(SilcServer server,
3325 SilcPacketStream sock,
3326 SilcClientEntry client,
3328 const char *signoff_message,
3332 SilcChannelEntry channel;
3333 SilcChannelClientEntry chl;
3334 SilcHashTableList htl;
3335 SilcBuffer clidp = NULL;
3340 if (notify && !client->id)
3343 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3344 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3347 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3352 /* Remove the client from all channels. The client is removed from
3353 the channels' user list. */
3354 silc_hash_table_list(client->channels, &htl);
3355 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3356 channel = chl->channel;
3358 /* Remove channel if this is last client leaving the channel, unless
3359 the channel is permanent. */
3360 if (server->server_type != SILC_SERVER &&
3361 silc_hash_table_count(channel->user_list) < 2) {
3362 silc_server_channel_delete(server, channel);
3366 silc_hash_table_del(client->channels, channel);
3367 silc_hash_table_del(channel->user_list, client);
3368 channel->user_count--;
3370 /* If there is no global users on the channel anymore mark the channel
3371 as local channel. Do not check if the removed client is local client. */
3372 if (server->server_type == SILC_SERVER && channel->global_users &&
3373 chl->client->router && !silc_server_channel_has_global(channel))
3374 channel->global_users = FALSE;
3376 memset(chl, 'A', sizeof(*chl));
3379 /* Update statistics */
3380 if (SILC_IS_LOCAL(client))
3381 server->stat.my_chanclients--;
3382 if (server->server_type == SILC_ROUTER) {
3383 server->stat.cell_chanclients--;
3384 server->stat.chanclients--;
3387 /* If there is not at least one local user on the channel then we don't
3388 need the channel entry anymore, we can remove it safely, unless the
3389 channel is permanent channel */
3390 if (server->server_type == SILC_SERVER &&
3391 !silc_server_channel_has_local(channel)) {
3392 /* Notify about leaving client if this channel has global users. */
3393 if (notify && channel->global_users)
3394 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3395 SILC_NOTIFY_TYPE_SIGNOFF,
3396 signoff_message ? 2 : 1,
3397 clidp->data, silc_buffer_len(clidp),
3398 signoff_message, signoff_message ?
3399 strlen(signoff_message) : 0);
3401 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3402 silc_server_channel_delete(server, channel);
3406 /* Send notify to channel about client leaving SILC and channel too */
3408 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3409 SILC_NOTIFY_TYPE_SIGNOFF,
3410 signoff_message ? 2 : 1,
3411 clidp->data, silc_buffer_len(clidp),
3412 signoff_message, signoff_message ?
3413 strlen(signoff_message) : 0);
3415 if (killed && clidp) {
3416 /* Remove the client from channel's invite list */
3417 if (channel->invite_list &&
3418 silc_hash_table_count(channel->invite_list)) {
3420 SilcArgumentPayload iargs;
3421 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3422 silc_buffer_len(clidp), 3);
3423 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3424 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3425 silc_buffer_free(ab);
3426 silc_argument_payload_free(iargs);
3430 /* Don't create keys if we are shutting down */
3431 if (server->server_shutdown)
3434 /* Re-generate channel key if needed */
3435 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3436 if (!silc_server_create_channel_key(server, channel, 0))
3439 /* Send the channel key to the channel. The key of course is not sent
3440 to the client who was removed from the channel. */
3441 silc_server_send_channel_key(server, client->connection, channel,
3442 server->server_type == SILC_ROUTER ?
3443 FALSE : !server->standalone);
3447 silc_hash_table_list_reset(&htl);
3449 silc_buffer_free(clidp);
3452 /* Removes client from one channel. This is used for example when client
3453 calls LEAVE command to remove itself from the channel. Returns TRUE
3454 if channel still exists and FALSE if the channel is removed when
3455 last client leaves the channel. If `notify' is FALSE notify messages
3458 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3459 SilcPacketStream sock,
3460 SilcChannelEntry channel,
3461 SilcClientEntry client,
3464 SilcChannelClientEntry chl;
3467 SILC_LOG_DEBUG(("Removing %s from channel %s",
3468 silc_id_render(client->id, SILC_ID_CLIENT),
3469 channel->channel_name));
3471 /* Get the entry to the channel, if this client is not on the channel
3473 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3476 /* Remove channel if this is last client leaving the channel, unless
3477 the channel is permanent. */
3478 if (server->server_type != SILC_SERVER &&
3479 silc_hash_table_count(channel->user_list) < 2) {
3480 silc_server_channel_delete(server, channel);
3484 silc_hash_table_del(client->channels, channel);
3485 silc_hash_table_del(channel->user_list, client);
3486 channel->user_count--;
3488 /* If there is no global users on the channel anymore mark the channel
3489 as local channel. Do not check if the client is local client. */
3490 if (server->server_type == SILC_SERVER && channel->global_users &&
3491 chl->client->router && !silc_server_channel_has_global(channel))
3492 channel->global_users = FALSE;
3494 memset(chl, 'O', sizeof(*chl));
3497 /* Update statistics */
3498 if (SILC_IS_LOCAL(client))
3499 server->stat.my_chanclients--;
3500 if (server->server_type == SILC_ROUTER) {
3501 server->stat.cell_chanclients--;
3502 server->stat.chanclients--;
3505 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3509 /* If there is not at least one local user on the channel then we don't
3510 need the channel entry anymore, we can remove it safely, unless the
3511 channel is permanent channel */
3512 if (server->server_type == SILC_SERVER &&
3513 !silc_server_channel_has_local(channel)) {
3514 /* Notify about leaving client if this channel has global users. */
3515 if (notify && channel->global_users)
3516 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3517 SILC_NOTIFY_TYPE_LEAVE, 1,
3518 clidp->data, silc_buffer_len(clidp));
3520 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3521 silc_server_channel_delete(server, channel);
3522 silc_buffer_free(clidp);
3526 /* Send notify to channel about client leaving the channel */
3528 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3529 SILC_NOTIFY_TYPE_LEAVE, 1,
3530 clidp->data, silc_buffer_len(clidp));
3532 silc_buffer_free(clidp);
3536 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3537 function may be used only by router. In real SILC network all channels
3538 are created by routers thus this function is never used by normal
3541 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3542 SilcServerID *router_id,
3548 SilcChannelID *channel_id;
3549 SilcChannelEntry entry;
3550 SilcCipher send_key, receive_key;
3553 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3556 cipher = SILC_DEFAULT_CIPHER;
3558 hmac = SILC_DEFAULT_HMAC;
3560 /* Allocate cipher */
3561 if (!silc_cipher_alloc(cipher, &send_key))
3563 if (!silc_cipher_alloc(cipher, &receive_key)) {
3564 silc_cipher_free(send_key);
3569 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3570 silc_cipher_free(send_key);
3571 silc_cipher_free(receive_key);
3575 channel_name = strdup(channel_name);
3577 /* Create the channel ID */
3578 if (!silc_id_create_channel_id(server, router_id, server->rng,
3580 silc_free(channel_name);
3581 silc_cipher_free(send_key);
3582 silc_cipher_free(receive_key);
3583 silc_hmac_free(newhmac);
3587 /* Create the channel */
3588 entry = silc_idlist_add_channel(server->local_list, channel_name,
3589 SILC_CHANNEL_MODE_NONE, channel_id,
3590 NULL, send_key, receive_key, newhmac);
3592 silc_free(channel_name);
3593 silc_cipher_free(send_key);
3594 silc_cipher_free(receive_key);
3595 silc_hmac_free(newhmac);
3596 silc_free(channel_id);
3600 entry->cipher = strdup(cipher);
3601 entry->hmac_name = strdup(hmac);
3603 /* Now create the actual key material */
3604 if (!silc_server_create_channel_key(server, entry,
3605 silc_cipher_get_key_len(send_key) / 8)) {
3606 silc_idlist_del_channel(server->local_list, entry);
3610 /* Notify other routers about the new channel. We send the packet
3611 to our primary route. */
3613 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3614 channel_name, entry->id,
3615 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3618 /* Distribute to backup routers */
3619 if (broadcast && server->server_type == SILC_ROUTER) {
3621 unsigned char cid[32];
3622 SilcUInt32 name_len = strlen(channel_name);
3625 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3626 packet = silc_channel_payload_encode(channel_name, name_len,
3627 cid, id_len, entry->mode);
3628 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3629 packet->data, silc_buffer_len(packet), FALSE,
3631 silc_buffer_free(packet);
3634 server->stat.my_channels++;
3635 if (server->server_type == SILC_ROUTER) {
3636 server->stat.channels++;
3637 server->stat.cell_channels++;
3638 entry->users_resolved = TRUE;
3644 /* Same as above but creates the channel with Channel ID `channel_id. */
3647 silc_server_create_new_channel_with_id(SilcServer server,
3651 SilcChannelID *channel_id,
3654 SilcChannelEntry entry;
3655 SilcCipher send_key, receive_key;
3658 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3661 cipher = SILC_DEFAULT_CIPHER;
3663 hmac = SILC_DEFAULT_HMAC;
3665 /* Allocate cipher */
3666 if (!silc_cipher_alloc(cipher, &send_key))
3668 if (!silc_cipher_alloc(cipher, &receive_key)) {
3669 silc_cipher_free(send_key);
3674 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3675 silc_cipher_free(send_key);
3676 silc_cipher_free(receive_key);
3680 channel_name = strdup(channel_name);
3682 /* Create the channel */
3683 entry = silc_idlist_add_channel(server->local_list, channel_name,
3684 SILC_CHANNEL_MODE_NONE, channel_id,
3685 NULL, send_key, receive_key, newhmac);
3687 silc_cipher_free(send_key);
3688 silc_cipher_free(receive_key);
3689 silc_hmac_free(newhmac);
3690 silc_free(channel_name);
3694 /* Now create the actual key material */
3695 if (!silc_server_create_channel_key(server, entry,
3696 silc_cipher_get_key_len(send_key) / 8)) {
3697 silc_idlist_del_channel(server->local_list, entry);
3701 /* Notify other routers about the new channel. We send the packet
3702 to our primary route. */
3704 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3705 channel_name, entry->id,
3706 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3709 /* Distribute to backup routers */
3710 if (broadcast && server->server_type == SILC_ROUTER) {
3712 unsigned char cid[32];
3713 SilcUInt32 name_len = strlen(channel_name);
3716 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3717 packet = silc_channel_payload_encode(channel_name, name_len,
3718 cid, id_len, entry->mode);
3719 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3720 packet->data, silc_buffer_len(packet), FALSE,
3722 silc_buffer_free(packet);
3725 server->stat.my_channels++;
3726 if (server->server_type == SILC_ROUTER) {
3727 server->stat.channels++;
3728 server->stat.cell_channels++;
3729 entry->users_resolved = TRUE;
3735 /* Channel's key re-key timeout callback. */
3737 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3739 SilcServer server = app_context;
3740 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3744 /* Return now if we are shutting down */
3745 if (server->server_shutdown)
3748 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3751 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3754 /* Generates new channel key. This is used to create the initial channel key
3755 but also to re-generate new key for channel. If `key_len' is provided
3756 it is the bytes of the key length. */
3758 SilcBool silc_server_create_channel_key(SilcServer server,
3759 SilcChannelEntry channel,
3763 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3766 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3767 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3771 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3773 if (!channel->send_key)
3774 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3775 channel->send_key = NULL;
3778 if (!channel->receive_key)
3779 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3780 silc_cipher_free(channel->send_key);
3781 channel->send_key = channel->receive_key = NULL;
3787 else if (channel->key_len)
3788 len = channel->key_len / 8;
3790 len = silc_cipher_get_key_len(channel->send_key) / 8;
3792 /* Create channel key */
3793 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3796 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3797 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3799 /* Remove old key if exists */
3801 memset(channel->key, 0, channel->key_len / 8);
3802 silc_free(channel->key);
3806 channel->key_len = len * 8;
3807 channel->key = silc_memdup(channel_key, len);
3808 memset(channel_key, 0, sizeof(channel_key));
3810 /* Generate HMAC key from the channel key data and set it */
3812 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3813 memset(channel->key, 0, channel->key_len / 8);
3814 silc_free(channel->key);
3815 silc_cipher_free(channel->send_key);
3816 silc_cipher_free(channel->receive_key);
3817 channel->send_key = channel->receive_key = NULL;
3820 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3821 silc_hmac_set_key(channel->hmac, hash,
3822 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3823 memset(hash, 0, sizeof(hash));
3825 if (server->server_type == SILC_ROUTER) {
3826 if (!channel->rekey)
3827 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3828 channel->rekey->channel = channel;
3829 channel->rekey->key_len = key_len;
3830 if (channel->rekey->task)
3831 silc_schedule_task_del(server->schedule, channel->rekey->task);
3833 channel->rekey->task =
3834 silc_schedule_task_add_timeout(server->schedule,
3835 silc_server_channel_key_rekey,
3836 (void *)channel->rekey,
3837 server->config->channel_rekey_secs, 0);
3843 /* Saves the channel key found in the encoded `key_payload' buffer. This
3844 function is used when we receive Channel Key Payload and also when we're
3845 processing JOIN command reply. Returns entry to the channel. */
3847 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3848 SilcBuffer key_payload,
3849 SilcChannelEntry channel)
3851 SilcChannelKeyPayload payload = NULL;
3853 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3857 /* Decode channel key payload */
3858 payload = silc_channel_key_payload_parse(key_payload->data,
3859 silc_buffer_len(key_payload));
3861 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3866 /* Get the channel entry */
3869 /* Get channel ID */
3870 tmp = silc_channel_key_get_id(payload, &tmp_len);
3871 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3876 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3878 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3880 if (server->server_type == SILC_ROUTER)
3881 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3882 silc_id_render(&id, SILC_ID_CHANNEL)));
3888 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3890 tmp = silc_channel_key_get_key(payload, &tmp_len);
3896 cipher = silc_channel_key_get_cipher(payload, NULL);
3902 /* Remove old key if exists */
3904 memset(channel->key, 0, channel->key_len / 8);
3905 silc_free(channel->key);
3906 silc_cipher_free(channel->send_key);
3907 silc_cipher_free(channel->receive_key);
3910 /* Create new cipher */
3911 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3912 channel->send_key = NULL;
3916 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3917 silc_cipher_free(channel->send_key);
3918 channel->send_key = channel->receive_key = NULL;
3923 if (channel->cipher)
3924 silc_free(channel->cipher);
3925 channel->cipher = strdup(cipher);
3928 channel->key_len = tmp_len * 8;
3929 channel->key = silc_memdup(tmp, tmp_len);
3930 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3931 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3933 /* Generate HMAC key from the channel key data and set it */
3935 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3936 memset(channel->key, 0, channel->key_len / 8);
3937 silc_free(channel->key);
3938 silc_cipher_free(channel->send_key);
3939 silc_cipher_free(channel->receive_key);
3940 channel->send_key = channel->receive_key = NULL;
3943 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3944 silc_hmac_set_key(channel->hmac, hash,
3945 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3947 memset(hash, 0, sizeof(hash));
3948 memset(tmp, 0, tmp_len);
3950 if (server->server_type == SILC_ROUTER) {
3951 if (!channel->rekey)
3952 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3953 channel->rekey->channel = channel;
3954 if (channel->rekey->task)
3955 silc_schedule_task_del(server->schedule, channel->rekey->task);
3957 channel->rekey->task =
3958 silc_schedule_task_add_timeout(server->schedule,
3959 silc_server_channel_key_rekey,
3960 (void *)channel->rekey,
3961 server->config->channel_rekey_secs, 0);
3966 silc_channel_key_payload_free(payload);
3971 /* Returns assembled of all servers in the given ID list. The packet's
3972 form is dictated by the New ID payload. */
3974 static void silc_server_announce_get_servers(SilcServer server,
3975 SilcServerEntry remote,
3977 SilcBuffer *servers,
3978 unsigned long creation_time)
3981 SilcIDCacheEntry id_cache;
3982 SilcServerEntry entry;
3986 /* Go through all clients in the list */
3987 if (silc_idcache_get_all(id_list->servers, &list)) {
3988 silc_list_start(list);
3989 while ((id_cache = silc_list_get(list))) {
3990 entry = (SilcServerEntry)id_cache->context;
3992 /* Do not announce the one we've sending our announcements and
3993 do not announce ourself. Also check the creation time if it's
3995 if ((entry == remote) || (entry == server->id_entry) ||
3996 (creation_time && entry->data.created < creation_time))
3999 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4001 tmp = silc_buffer_realloc(*servers,
4003 silc_buffer_truelen((*servers)) +
4004 silc_buffer_len(idp) :
4005 silc_buffer_len(idp)));
4009 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4010 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4011 silc_buffer_pull(*servers, silc_buffer_len(idp));
4012 silc_buffer_free(idp);
4018 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4024 p = silc_notify_payload_encode(notify, argc, ap);
4030 /* This function is used by router to announce existing servers to our
4031 primary router when we've connected to it. If `creation_time' is non-zero
4032 then only the servers that has been created after the `creation_time'
4033 will be announced. */
4035 void silc_server_announce_servers(SilcServer server, SilcBool global,
4036 unsigned long creation_time,
4037 SilcPacketStream remote)
4039 SilcBuffer servers = NULL;
4041 SILC_LOG_DEBUG(("Announcing servers"));
4043 /* Get servers in local list */
4044 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4045 server->local_list, &servers,
4049 /* Get servers in global list */
4050 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4051 server->global_list, &servers,
4055 silc_buffer_push(servers, servers->data - servers->head);
4056 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4058 /* Send the packet */
4059 silc_server_packet_send(server, remote,
4060 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4061 servers->data, silc_buffer_len(servers));
4063 silc_buffer_free(servers);
4067 /* Returns assembled packet of all clients in the given ID list. The
4068 packet's form is dictated by the New ID Payload. */
4070 static void silc_server_announce_get_clients(SilcServer server,
4072 SilcBuffer *clients,
4074 unsigned long creation_time)
4077 SilcIDCacheEntry id_cache;
4078 SilcClientEntry client;
4081 unsigned char mode[4];
4084 /* Go through all clients in the list */
4085 if (silc_idcache_get_all(id_list->clients, &list)) {
4086 silc_list_start(list);
4087 while ((id_cache = silc_list_get(list))) {
4088 client = (SilcClientEntry)id_cache->context;
4090 if (creation_time && client->data.created < creation_time)
4092 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4094 if (!client->connection && !client->router)
4097 SILC_LOG_DEBUG(("Announce Client ID %s",
4098 silc_id_render(client->id, SILC_ID_CLIENT)));
4100 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4104 tmp2 = silc_buffer_realloc(*clients,
4106 silc_buffer_truelen((*clients)) +
4107 silc_buffer_len(idp) :
4108 silc_buffer_len(idp)));
4112 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4113 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4114 silc_buffer_pull(*clients, silc_buffer_len(idp));
4116 SILC_PUT32_MSB(client->mode, mode);
4118 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4119 2, idp->data, silc_buffer_len(idp),
4121 tmp2 = silc_buffer_realloc(*umodes,
4123 silc_buffer_truelen((*umodes)) +
4124 silc_buffer_len(tmp) :
4125 silc_buffer_len(tmp)));
4129 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4130 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4131 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4132 silc_buffer_free(tmp);
4134 silc_buffer_free(idp);
4139 /* This function is used to announce our existing clients to our router
4140 when we've connected to it. If `creation_time' is non-zero then only
4141 the clients that has been created after the `creation_time' will be
4144 void silc_server_announce_clients(SilcServer server,
4145 unsigned long creation_time,
4146 SilcPacketStream remote)
4148 SilcBuffer clients = NULL;
4149 SilcBuffer umodes = NULL;
4151 SILC_LOG_DEBUG(("Announcing clients"));
4153 /* Get clients in local list */
4154 silc_server_announce_get_clients(server, server->local_list,
4155 &clients, &umodes, creation_time);
4157 /* As router we announce our global list as well */
4158 if (server->server_type == SILC_ROUTER)
4159 silc_server_announce_get_clients(server, server->global_list,
4160 &clients, &umodes, creation_time);
4163 silc_buffer_push(clients, clients->data - clients->head);
4164 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4166 /* Send the packet */
4167 silc_server_packet_send(server, remote,
4168 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4169 clients->data, silc_buffer_len(clients));
4171 silc_buffer_free(clients);
4175 silc_buffer_push(umodes, umodes->data - umodes->head);
4176 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4178 /* Send the packet */
4179 silc_server_packet_send(server, remote,
4180 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4181 umodes->data, silc_buffer_len(umodes));
4183 silc_buffer_free(umodes);
4187 /* Returns channel's topic for announcing it */
4189 void silc_server_announce_get_channel_topic(SilcServer server,
4190 SilcChannelEntry channel,
4195 if (channel->topic) {
4196 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4197 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4199 silc_buffer_len(chidp),
4201 strlen(channel->topic));
4202 silc_buffer_free(chidp);
4206 /* Returns channel's invite and ban lists */
4208 void silc_server_announce_get_inviteban(SilcServer server,
4209 SilcChannelEntry channel,
4213 SilcBuffer list, idp, idp2, tmp2;
4216 SilcHashTableList htl;
4217 const unsigned char a[1] = { 0x03 };
4219 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4221 /* Encode invite list */
4222 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4223 list = silc_buffer_alloc_size(2);
4224 type = silc_hash_table_count(channel->invite_list);
4225 SILC_PUT16_MSB(type, list->data);
4226 silc_hash_table_list(channel->invite_list, &htl);
4227 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4228 list = silc_argument_payload_encode_one(list, tmp2->data,
4229 silc_buffer_len(tmp2),
4230 SILC_PTR_TO_32(ptype));
4231 silc_hash_table_list_reset(&htl);
4233 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4235 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4236 idp->data, silc_buffer_len(idp),
4237 channel->channel_name,
4238 strlen(channel->channel_name),
4239 idp2->data, silc_buffer_len(idp2),
4241 list->data, silc_buffer_len(list));
4242 silc_buffer_free(idp2);
4243 silc_buffer_free(list);
4246 /* Encode ban list */
4247 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4248 list = silc_buffer_alloc_size(2);
4249 type = silc_hash_table_count(channel->ban_list);
4250 SILC_PUT16_MSB(type, list->data);
4251 silc_hash_table_list(channel->ban_list, &htl);
4252 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4253 list = silc_argument_payload_encode_one(list, tmp2->data,
4254 silc_buffer_len(tmp2),
4255 SILC_PTR_TO_32(ptype));
4256 silc_hash_table_list_reset(&htl);
4259 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4260 idp->data, silc_buffer_len(idp),
4262 list->data, silc_buffer_len(list));
4263 silc_buffer_free(list);
4266 silc_buffer_free(idp);
4269 /* Returns assembled packets for channel users of the `channel'. */
4271 void silc_server_announce_get_channel_users(SilcServer server,
4272 SilcChannelEntry channel,
4273 SilcBuffer *channel_modes,
4274 SilcBuffer *channel_users,
4275 SilcBuffer *channel_users_modes)
4277 SilcChannelClientEntry chl;
4278 SilcHashTableList htl;
4279 SilcBuffer chidp, clidp, csidp;
4280 SilcBuffer tmp, fkey = NULL, chpklist;
4282 unsigned char mode[4], ulimit[4];
4286 SILC_LOG_DEBUG(("Start"));
4288 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4289 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4290 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4293 SILC_PUT32_MSB(channel->mode, mode);
4294 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4295 SILC_PUT32_MSB(channel->user_limit, ulimit);
4296 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4297 if (channel->founder_key)
4298 fkey = silc_public_key_payload_encode(channel->founder_key);
4300 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4302 silc_buffer_len(csidp),
4305 hmac, hmac ? strlen(hmac) : 0,
4306 channel->passphrase,
4307 channel->passphrase ?
4308 strlen(channel->passphrase) : 0,
4309 fkey ? fkey->data : NULL,
4310 fkey ? silc_buffer_len(fkey) : 0,
4311 chpklist ? chpklist->data : NULL,
4313 silc_buffer_len(chpklist) : 0,
4315 SILC_CHANNEL_MODE_ULIMIT ?
4318 SILC_CHANNEL_MODE_ULIMIT ?
4319 sizeof(ulimit) : 0));
4320 len = silc_buffer_len(tmp);
4322 silc_buffer_realloc(*channel_modes,
4324 silc_buffer_truelen((*channel_modes)) + len : len));
4327 *channel_modes = tmp2;
4328 silc_buffer_pull_tail(*channel_modes,
4329 ((*channel_modes)->end -
4330 (*channel_modes)->data));
4331 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4332 silc_buffer_pull(*channel_modes, len);
4333 silc_buffer_free(tmp);
4334 silc_buffer_free(fkey);
4337 /* Now find all users on the channel */
4338 silc_hash_table_list(channel->user_list, &htl);
4339 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4340 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4342 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4346 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4348 silc_buffer_len(clidp),
4350 silc_buffer_len(chidp));
4351 len = silc_buffer_len(tmp);
4353 silc_buffer_realloc(*channel_users,
4355 silc_buffer_truelen((*channel_users)) + len : len));
4358 *channel_users = tmp2;
4359 silc_buffer_pull_tail(*channel_users,
4360 ((*channel_users)->end -
4361 (*channel_users)->data));
4363 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4364 silc_buffer_pull(*channel_users, len);
4365 silc_buffer_free(tmp);
4367 /* CUMODE notify for mode change on the channel */
4368 SILC_PUT32_MSB(chl->mode, mode);
4369 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4370 fkey = silc_public_key_payload_encode(channel->founder_key);
4371 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4373 silc_buffer_len(csidp),
4376 silc_buffer_len(clidp),
4377 fkey ? fkey->data : NULL,
4378 fkey ? silc_buffer_len(fkey) : 0);
4379 len = silc_buffer_len(tmp);
4381 silc_buffer_realloc(*channel_users_modes,
4382 (*channel_users_modes ?
4383 silc_buffer_truelen((*channel_users_modes)) +
4387 *channel_users_modes = tmp2;
4388 silc_buffer_pull_tail(*channel_users_modes,
4389 ((*channel_users_modes)->end -
4390 (*channel_users_modes)->data));
4392 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4393 silc_buffer_pull(*channel_users_modes, len);
4394 silc_buffer_free(tmp);
4395 silc_buffer_free(fkey);
4397 silc_buffer_free(clidp);
4399 silc_hash_table_list_reset(&htl);
4400 silc_buffer_free(chidp);
4401 silc_buffer_free(csidp);
4404 /* Returns assembled packets for all channels and users on those channels
4405 from the given ID List. The packets are in the form dictated by the
4406 New Channel and New Channel User payloads. */
4408 void silc_server_announce_get_channels(SilcServer server,
4410 SilcBuffer *channels,
4411 SilcBuffer **channel_modes,
4412 SilcBuffer *channel_users,
4413 SilcBuffer **channel_users_modes,
4414 SilcUInt32 *channel_users_modes_c,
4415 SilcBuffer **channel_topics,
4416 SilcBuffer **channel_invites,
4417 SilcBuffer **channel_bans,
4418 SilcChannelID ***channel_ids,
4419 unsigned long creation_time)
4422 SilcIDCacheEntry id_cache;
4423 SilcChannelEntry channel;
4424 unsigned char cid[32];
4426 SilcUInt16 name_len;
4428 int i = *channel_users_modes_c;
4432 SILC_LOG_DEBUG(("Start"));
4434 /* Go through all channels in the list */
4435 if (silc_idcache_get_all(id_list->channels, &list)) {
4436 silc_list_start(list);
4437 while ((id_cache = silc_list_get(list))) {
4438 channel = (SilcChannelEntry)id_cache->context;
4440 if (creation_time && channel->created < creation_time)
4445 SILC_LOG_DEBUG(("Announce Channel ID %s",
4446 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4448 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4449 name_len = strlen(channel->channel_name);
4452 len = 4 + name_len + id_len + 4;
4454 silc_buffer_realloc(*channels,
4456 silc_buffer_truelen((*channels)) +
4462 silc_buffer_pull_tail(*channels,
4463 ((*channels)->end - (*channels)->data));
4464 silc_buffer_format(*channels,
4465 SILC_STR_UI_SHORT(name_len),
4466 SILC_STR_UI_XNSTRING(channel->channel_name,
4468 SILC_STR_UI_SHORT(id_len),
4469 SILC_STR_UI_XNSTRING(cid, id_len),
4470 SILC_STR_UI_INT(channel->mode),
4472 silc_buffer_pull(*channels, len);
4475 if (creation_time && channel->updated < creation_time)
4481 /* Channel user modes */
4482 tmp = silc_realloc(*channel_users_modes,
4483 sizeof(**channel_users_modes) * (i + 1));
4486 *channel_users_modes = tmp;
4487 (*channel_users_modes)[i] = NULL;
4488 tmp = silc_realloc(*channel_modes,
4489 sizeof(**channel_modes) * (i + 1));
4492 *channel_modes = tmp;
4493 (*channel_modes)[i] = NULL;
4494 tmp = silc_realloc(*channel_ids,
4495 sizeof(**channel_ids) * (i + 1));
4499 (*channel_ids)[i] = NULL;
4500 silc_server_announce_get_channel_users(server, channel,
4501 &(*channel_modes)[i],
4503 &(*channel_users_modes)[i]);
4504 (*channel_ids)[i] = channel->id;
4506 /* Channel's topic */
4507 tmp = silc_realloc(*channel_topics,
4508 sizeof(**channel_topics) * (i + 1));
4511 *channel_topics = tmp;
4512 (*channel_topics)[i] = NULL;
4513 silc_server_announce_get_channel_topic(server, channel,
4514 &(*channel_topics)[i]);
4516 /* Channel's invite and ban list */
4517 tmp = silc_realloc(*channel_invites,
4518 sizeof(**channel_invites) * (i + 1));
4521 *channel_invites = tmp;
4522 (*channel_invites)[i] = NULL;
4523 tmp = silc_realloc(*channel_bans,
4524 sizeof(**channel_bans) * (i + 1));
4527 *channel_bans = tmp;
4528 (*channel_bans)[i] = NULL;
4529 silc_server_announce_get_inviteban(server, channel,
4530 &(*channel_invites)[i],
4531 &(*channel_bans)[i]);
4533 (*channel_users_modes_c)++;
4541 /* This function is used to announce our existing channels to our router
4542 when we've connected to it. This also announces the users on the
4543 channels to the router. If the `creation_time' is non-zero only the
4544 channels that was created after the `creation_time' are announced.
4545 Note that the channel users are still announced even if the `creation_time'
4548 void silc_server_announce_channels(SilcServer server,
4549 unsigned long creation_time,
4550 SilcPacketStream remote)
4552 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4553 SilcBuffer *channel_users_modes = NULL;
4554 SilcBuffer *channel_topics = NULL;
4555 SilcBuffer *channel_invites = NULL;
4556 SilcBuffer *channel_bans = NULL;
4557 SilcUInt32 channel_users_modes_c = 0;
4558 SilcChannelID **channel_ids = NULL;
4560 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4562 /* Get channels and channel users in local list */
4563 silc_server_announce_get_channels(server, server->local_list,
4564 &channels, &channel_modes,
4566 &channel_users_modes,
4567 &channel_users_modes_c,
4571 &channel_ids, creation_time);
4573 /* Get channels and channel users in global list */
4574 if (server->server_type != SILC_SERVER)
4575 silc_server_announce_get_channels(server, server->global_list,
4576 &channels, &channel_modes,
4578 &channel_users_modes,
4579 &channel_users_modes_c,
4583 &channel_ids, creation_time);
4586 silc_buffer_push(channels, channels->data - channels->head);
4587 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4589 /* Send the packet */
4590 silc_server_packet_send(server, remote,
4591 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4592 channels->data, silc_buffer_len(channels));
4594 silc_buffer_free(channels);
4597 if (channel_users) {
4598 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4599 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4600 silc_buffer_len(channel_users));
4602 /* Send the packet */
4603 silc_server_packet_send(server, remote,
4604 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4605 channel_users->data, silc_buffer_len(channel_users));
4607 silc_buffer_free(channel_users);
4610 if (channel_modes) {
4613 for (i = 0; i < channel_users_modes_c; i++) {
4614 if (!channel_modes[i])
4616 silc_buffer_push(channel_modes[i],
4617 channel_modes[i]->data -
4618 channel_modes[i]->head);
4619 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4620 silc_buffer_len(channel_modes[i]));
4621 silc_server_packet_send_dest(server, remote,
4622 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4623 channel_ids[i], SILC_ID_CHANNEL,
4624 channel_modes[i]->data,
4625 silc_buffer_len(channel_modes[i]));
4626 silc_buffer_free(channel_modes[i]);
4628 silc_free(channel_modes);
4631 if (channel_users_modes) {
4634 for (i = 0; i < channel_users_modes_c; i++) {
4635 if (!channel_users_modes[i])
4637 silc_buffer_push(channel_users_modes[i],
4638 channel_users_modes[i]->data -
4639 channel_users_modes[i]->head);
4640 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4641 silc_buffer_len(channel_users_modes[i]));
4642 silc_server_packet_send_dest(server, remote,
4643 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4644 channel_ids[i], SILC_ID_CHANNEL,
4645 channel_users_modes[i]->data,
4646 silc_buffer_len(channel_users_modes[i]));
4647 silc_buffer_free(channel_users_modes[i]);
4649 silc_free(channel_users_modes);
4652 if (channel_topics) {
4655 for (i = 0; i < channel_users_modes_c; i++) {
4656 if (!channel_topics[i])
4659 silc_buffer_push(channel_topics[i],
4660 channel_topics[i]->data -
4661 channel_topics[i]->head);
4662 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4663 silc_buffer_len(channel_topics[i]));
4664 silc_server_packet_send_dest(server, remote,
4665 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4666 channel_ids[i], SILC_ID_CHANNEL,
4667 channel_topics[i]->data,
4668 silc_buffer_len(channel_topics[i]));
4669 silc_buffer_free(channel_topics[i]);
4671 silc_free(channel_topics);
4674 if (channel_invites) {
4677 for (i = 0; i < channel_users_modes_c; i++) {
4678 if (!channel_invites[i])
4681 silc_buffer_push(channel_invites[i],
4682 channel_invites[i]->data -
4683 channel_invites[i]->head);
4684 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4685 silc_buffer_len(channel_invites[i]));
4686 silc_server_packet_send_dest(server, remote,
4687 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4688 channel_ids[i], SILC_ID_CHANNEL,
4689 channel_invites[i]->data,
4690 silc_buffer_len(channel_invites[i]));
4691 silc_buffer_free(channel_invites[i]);
4693 silc_free(channel_invites);
4699 for (i = 0; i < channel_users_modes_c; i++) {
4700 if (!channel_bans[i])
4703 silc_buffer_push(channel_bans[i],
4704 channel_bans[i]->data -
4705 channel_bans[i]->head);
4706 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4707 silc_buffer_len(channel_bans[i]));
4708 silc_server_packet_send_dest(server, remote,
4709 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4710 channel_ids[i], SILC_ID_CHANNEL,
4711 channel_bans[i]->data,
4712 silc_buffer_len(channel_bans[i]));
4713 silc_buffer_free(channel_bans[i]);
4715 silc_free(channel_bans);
4718 silc_free(channel_ids);
4721 /* Announces WATCH list. */
4723 void silc_server_announce_watches(SilcServer server,
4724 SilcPacketStream remote)
4726 SilcHashTableList htl;
4727 SilcBuffer buffer, idp, args, pkp;
4728 SilcClientEntry client;
4731 SILC_LOG_DEBUG(("Announcing watch list"));
4733 /* XXX because way we save the nicks (hash) we cannot announce them. */
4735 /* XXX we should send all public keys in one command if client is
4736 watching more than one key */
4737 silc_hash_table_list(server->watcher_list_pk, &htl);
4738 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4739 if (!client || !client->id)
4742 server->stat.commands_sent++;
4744 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4745 args = silc_buffer_alloc_size(2);
4746 silc_buffer_format(args,
4747 SILC_STR_UI_SHORT(1),
4749 pkp = silc_public_key_payload_encode(key);
4750 args = silc_argument_payload_encode_one(args, pkp->data,
4751 silc_buffer_len(pkp), 0x00);
4752 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4753 ++server->cmd_ident, 2,
4754 1, idp->data, silc_buffer_len(idp),
4756 silc_buffer_len(args));
4759 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4760 buffer->data, silc_buffer_len(buffer));
4762 silc_buffer_free(pkp);
4763 silc_buffer_free(args);
4764 silc_buffer_free(idp);
4765 silc_buffer_free(buffer);
4767 silc_hash_table_list_reset(&htl);
4770 /* Assembles user list and users mode list from the `channel'. */
4772 SilcBool silc_server_get_users_on_channel(SilcServer server,
4773 SilcChannelEntry channel,
4774 SilcBuffer *user_list,
4775 SilcBuffer *mode_list,
4776 SilcUInt32 *user_count)
4778 SilcChannelClientEntry chl;
4779 SilcHashTableList htl;
4780 SilcBuffer client_id_list;
4781 SilcBuffer client_mode_list;
4783 SilcUInt32 list_count = 0, len = 0;
4785 if (!silc_hash_table_count(channel->user_list))
4788 silc_hash_table_list(channel->user_list, &htl);
4789 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4790 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4791 silc_hash_table_list_reset(&htl);
4793 client_id_list = silc_buffer_alloc(len);
4795 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4796 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4797 silc_buffer_pull_tail(client_mode_list,
4798 silc_buffer_truelen(client_mode_list));
4800 silc_hash_table_list(channel->user_list, &htl);
4801 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4803 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4804 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4805 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4806 silc_buffer_free(idp);
4808 /* Client's mode on channel */
4809 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4810 silc_buffer_pull(client_mode_list, 4);
4814 silc_hash_table_list_reset(&htl);
4815 silc_buffer_push(client_id_list,
4816 client_id_list->data - client_id_list->head);
4817 silc_buffer_push(client_mode_list,
4818 client_mode_list->data - client_mode_list->head);
4820 *user_list = client_id_list;
4821 *mode_list = client_mode_list;
4822 *user_count = list_count;
4826 /* Saves users and their modes to the `channel'. */
4828 void silc_server_save_users_on_channel(SilcServer server,
4829 SilcPacketStream sock,
4830 SilcChannelEntry channel,
4831 SilcClientID *noadd,
4832 SilcBuffer user_list,
4833 SilcBuffer mode_list,
4834 SilcUInt32 user_count)
4840 SilcClientEntry client;
4841 SilcIDCacheEntry cache;
4842 SilcChannelClientEntry chl;
4844 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4845 channel->channel_name));
4847 for (i = 0; i < user_count; i++) {
4849 SILC_GET16_MSB(idp_len, user_list->data + 2);
4851 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4853 silc_buffer_pull(user_list, idp_len);
4856 SILC_GET32_MSB(mode, mode_list->data);
4857 silc_buffer_pull(mode_list, 4);
4859 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4864 /* Check if we have this client cached already. */
4865 client = silc_idlist_find_client_by_id(server->local_list,
4867 server->server_type, &cache);
4869 client = silc_idlist_find_client_by_id(server->global_list,
4871 server->server_type, &cache);
4873 /* If router did not find such Client ID in its lists then this must
4874 be bogus client or some router in the net is buggy. */
4875 if (server->server_type != SILC_SERVER)
4878 /* We don't have that client anywhere, add it. The client is added
4879 to global list since server didn't have it in the lists so it must be
4881 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4882 silc_id_dup(&id.u.client_id,
4884 silc_packet_get_context(sock),
4887 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4891 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4894 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4895 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4896 "%s", channel->channel_name));
4900 if (!silc_server_client_on_channel(client, channel, &chl)) {
4901 /* Client was not on the channel, add it. */
4902 chl = silc_calloc(1, sizeof(*chl));
4903 chl->client = client;
4905 chl->channel = channel;
4906 silc_hash_table_add(channel->user_list, chl->client, chl);
4907 silc_hash_table_add(client->channels, chl->channel, chl);
4908 channel->user_count++;
4916 /* Saves channels and channels user modes to the `client'. Removes
4917 the client from those channels that are not sent in the list but
4920 void silc_server_save_user_channels(SilcServer server,
4921 SilcPacketStream sock,
4922 SilcClientEntry client,
4923 SilcBuffer channels,
4924 SilcBuffer channels_user_modes)
4927 SilcUInt32 *chumodes;
4928 SilcChannelPayload entry;
4929 SilcChannelEntry channel;
4930 SilcChannelID channel_id;
4931 SilcChannelClientEntry chl;
4932 SilcHashTable ht = NULL;
4933 SilcHashTableList htl;
4937 if (!channels || !channels_user_modes ||
4938 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4941 ch = silc_channel_payload_parse_list(channels->data,
4942 silc_buffer_len(channels));
4943 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4945 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4946 NULL, NULL, NULL, TRUE);
4947 silc_dlist_start(ch);
4948 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4949 /* Check if we have this channel, and add it if we don't have it.
4950 Also add the client on the channel unless it is there already. */
4951 if (!silc_channel_get_id_parse(entry, &channel_id))
4953 channel = silc_idlist_find_channel_by_id(server->local_list,
4956 channel = silc_idlist_find_channel_by_id(server->global_list,
4959 if (server->server_type != SILC_SERVER) {
4964 /* We don't have that channel anywhere, add it. */
4965 name = silc_channel_get_name(entry, NULL);
4966 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4967 silc_id_dup(&channel_id,
4969 server->router, NULL, NULL, 0);
4976 channel->mode = silc_channel_get_mode(entry);
4978 /* Add the client on the channel */
4979 if (!silc_server_client_on_channel(client, channel, &chl)) {
4980 chl = silc_calloc(1, sizeof(*chl));
4981 chl->client = client;
4982 chl->mode = chumodes[i++];
4983 chl->channel = channel;
4984 silc_hash_table_add(channel->user_list, chl->client, chl);
4985 silc_hash_table_add(client->channels, chl->channel, chl);
4986 channel->user_count++;
4989 chl->mode = chumodes[i++];
4992 silc_hash_table_add(ht, channel, channel);
4994 silc_channel_payload_list_free(ch);
4995 silc_free(chumodes);
4999 /* Go through the list again and remove client from channels that
5000 are no part of the list. */
5002 silc_hash_table_list(client->channels, &htl);
5003 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5004 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5005 silc_hash_table_del(chl->channel->user_list, chl->client);
5006 silc_hash_table_del(chl->client->channels, chl->channel);
5010 silc_hash_table_list_reset(&htl);
5011 silc_hash_table_free(ht);
5013 silc_hash_table_list(client->channels, &htl);
5014 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5015 silc_hash_table_del(chl->channel->user_list, chl->client);
5016 silc_hash_table_del(chl->client->channels, chl->channel);
5019 silc_hash_table_list_reset(&htl);
5023 /* Lookups route to the client indicated by the `id_data'. The connection
5024 object and internal data object is returned. Returns NULL if route
5025 could not be found to the client. If the `client_id' is specified then
5026 it is used and the `id_data' is ignored. */
5029 silc_server_get_client_route(SilcServer server,
5030 unsigned char *id_data,
5032 SilcClientID *client_id,
5033 SilcIDListData *idata,
5034 SilcClientEntry *client_entry)
5036 SilcClientID *id, clid;
5037 SilcClientEntry client;
5039 SILC_LOG_DEBUG(("Start"));
5042 *client_entry = NULL;
5044 /* Decode destination Client ID */
5046 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5048 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5050 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5053 /* If the destination belongs to our server we don't have to route
5054 the packet anywhere but to send it to the local destination. */
5055 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5059 /* If we are router and the client has router then the client is in
5060 our cell but not directly connected to us. */
5061 if (server->server_type == SILC_ROUTER && client->router) {
5062 /* We are of course in this case the client's router thus the route
5063 to the client is the server who owns the client. So, we will send
5064 the packet to that server. */
5066 *idata = (SilcIDListData)client->router;
5067 return client->router->connection;
5070 /* Seems that client really is directly connected to us */
5072 *idata = (SilcIDListData)client;
5074 *client_entry = client;
5075 return client->connection;
5078 /* Destination belongs to someone not in this server. If we are normal
5079 server our action is to send the packet to our router. */
5080 if (server->server_type != SILC_ROUTER && !server->standalone) {
5083 *idata = (SilcIDListData)server->router;
5084 return SILC_PRIMARY_ROUTE(server);
5087 /* We are router and we will perform route lookup for the destination
5088 and send the packet to fastest route. */
5089 if (server->server_type == SILC_ROUTER && !server->standalone) {
5090 /* Check first that the ID is valid */
5091 client = silc_idlist_find_client_by_id(server->global_list, id,
5094 SilcPacketStream dst_sock;
5096 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5099 if (idata && dst_sock)
5100 *idata = silc_packet_get_context(dst_sock);
5109 /* Encodes and returns channel list of channels the `client' has joined.
5110 Secret channels are not put to the list. */
5112 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5113 SilcClientEntry client,
5114 SilcBool get_private,
5115 SilcBool get_secret,
5116 SilcBuffer *user_mode_list)
5118 SilcBuffer buffer = NULL;
5119 SilcChannelEntry channel;
5120 SilcChannelClientEntry chl;
5121 SilcHashTableList htl;
5122 unsigned char cid[32];
5124 SilcUInt16 name_len;
5128 *user_mode_list = NULL;
5130 silc_hash_table_list(client->channels, &htl);
5131 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5132 channel = chl->channel;
5134 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5136 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5139 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5140 name_len = strlen(channel->channel_name);
5142 len = 4 + name_len + id_len + 4;
5143 buffer = silc_buffer_realloc(buffer,
5145 silc_buffer_truelen(buffer) + len : len));
5146 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5147 silc_buffer_format(buffer,
5148 SILC_STR_UI_SHORT(name_len),
5149 SILC_STR_DATA(channel->channel_name, name_len),
5150 SILC_STR_UI_SHORT(id_len),
5151 SILC_STR_DATA(cid, id_len),
5152 SILC_STR_UI_INT(chl->channel->mode),
5154 silc_buffer_pull(buffer, len);
5156 if (user_mode_list) {
5158 silc_buffer_realloc(*user_mode_list,
5160 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5161 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5162 (*user_mode_list)->data));
5163 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5164 silc_buffer_pull(*user_mode_list, 4);
5167 silc_hash_table_list_reset(&htl);
5170 silc_buffer_push(buffer, buffer->data - buffer->head);
5171 if (user_mode_list && *user_mode_list)
5172 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5173 (*user_mode_list)->head));
5178 /* Task callback used to retrieve network statistical information from
5179 router server once in a while. */
5181 SILC_TASK_CALLBACK(silc_server_get_stats)
5183 SilcServer server = (SilcServer)context;
5184 SilcBuffer idp, packet;
5186 if (!server->standalone) {
5187 SILC_LOG_DEBUG(("Retrieving stats from router"));
5188 server->stat.commands_sent++;
5189 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5191 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5192 ++server->cmd_ident, 1,
5194 silc_buffer_len(idp));
5195 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5196 SILC_PACKET_COMMAND, 0, packet->data,
5197 silc_buffer_len(packet));
5198 silc_buffer_free(packet);
5199 silc_buffer_free(idp);
5203 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,