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 /* For unregistered clients the created timestamp is actually
1267 unregistered timestamp. Make sure client remains in history
1268 at least 500 seconds. */
1269 if (client->data.created && curtime - client->data.created < 500)
1272 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1273 server->local_list : server->global_list);
1275 silc_idlist_del_data(client);
1276 silc_idlist_del_client(id_list, client);
1277 silc_dlist_del(server->expired_clients, client);
1280 silc_schedule_task_add_timeout(server->schedule,
1281 silc_server_purge_expired_clients, server,
1286 /******************************* Connecting *********************************/
1288 /* Free connection context */
1290 void silc_server_connection_free(SilcServerConnection sconn)
1294 SILC_LOG_DEBUG(("Free connection %p", sconn));
1295 silc_dlist_del(sconn->server->conns, sconn);
1296 silc_server_config_unref(&sconn->conn);
1297 silc_free(sconn->remote_host);
1298 silc_free(sconn->backup_replace_ip);
1302 /* Creates connection to a remote router. */
1304 void silc_server_create_connection(SilcServer server,
1307 const char *remote_host, SilcUInt32 port,
1308 SilcServerConnectCallback callback,
1311 SilcServerConnection sconn;
1313 /* Allocate connection object for hold connection specific stuff. */
1314 sconn = silc_calloc(1, sizeof(*sconn));
1317 sconn->remote_host = strdup(remote_host);
1318 sconn->remote_port = port;
1319 sconn->no_reconnect = reconnect == FALSE;
1320 sconn->callback = callback;
1321 sconn->callback_context = context;
1322 sconn->no_conf = dynamic;
1323 sconn->server = server;
1325 SILC_LOG_DEBUG(("Created connection %p", sconn));
1327 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1331 /* Connection authentication completion callback */
1334 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1337 SilcServerConnection sconn = context;
1338 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1339 SilcServer server = entry->server;
1340 SilcServerConfigServer *conn;
1341 SilcServerConfigConnParams *param;
1342 SilcIDListData idata;
1343 SilcServerEntry id_entry = NULL;
1344 unsigned char id[32];
1349 SILC_LOG_DEBUG(("Connection %p authentication completed, entry %p",
1354 if (success == FALSE) {
1355 /* Authentication failed */
1356 /* XXX retry connecting */
1358 if (sconn->callback)
1359 (*sconn->callback)(server, NULL, sconn->callback_context);
1360 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1361 silc_server_disconnect_remote(server, sconn->sock,
1362 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1366 /* XXX For now remote is router always */
1367 entry->data.conn_type = SILC_CONN_ROUTER;
1369 SILC_LOG_INFO(("Connected to %s %s",
1370 SILC_CONNTYPE_STRING(entry->data.conn_type),
1371 sconn->remote_host));
1373 /* Create the actual entry for remote entity */
1374 switch (entry->data.conn_type) {
1375 case SILC_CONN_SERVER:
1376 SILC_LOG_DEBUG(("Remote is SILC server"));
1378 /* Add new server. The server must register itself to us before it
1379 becomes registered to SILC network. */
1380 id_entry = silc_idlist_add_server(server->local_list,
1381 strdup(sconn->remote_host),
1382 SILC_SERVER, NULL, NULL, sconn->sock);
1384 if (sconn->callback)
1385 (*sconn->callback)(server, NULL, sconn->callback_context);
1386 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1387 silc_server_disconnect_remote(server, sconn->sock,
1388 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1393 server->stat.my_servers++;
1394 if (server->server_type == SILC_ROUTER)
1395 server->stat.servers++;
1396 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1398 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1401 case SILC_CONN_ROUTER:
1402 SILC_LOG_DEBUG(("Remote is SILC router"));
1404 /* Register to network */
1405 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1406 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1407 SILC_STR_UI_SHORT(id_len),
1408 SILC_STR_DATA(id, id_len),
1409 SILC_STR_UI_SHORT(strlen(server->server_name)),
1410 SILC_STR_DATA(server->server_name,
1411 strlen(server->server_name)),
1413 if (sconn->callback)
1414 (*sconn->callback)(server, NULL, sconn->callback_context);
1415 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1416 silc_server_disconnect_remote(server, sconn->sock,
1417 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1422 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1424 /* Check that we do not have this ID already */
1425 id_entry = silc_idlist_find_server_by_id(server->local_list,
1426 &remote_id.u.server_id,
1429 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1431 id_entry = silc_idlist_find_server_by_id(server->global_list,
1432 &remote_id.u.server_id,
1435 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1439 SILC_LOG_DEBUG(("New server id(%s)",
1440 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1442 /* Add the connected router to global server list. Router is sent
1443 as NULL since it's local to us. */
1444 id_entry = silc_idlist_add_server(server->global_list,
1445 strdup(sconn->remote_host),
1447 silc_id_dup(&remote_id.u.server_id,
1451 if (sconn->callback)
1452 (*sconn->callback)(server, NULL, sconn->callback_context);
1453 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1454 silc_server_disconnect_remote(server, sconn->sock,
1455 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1460 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1461 idata = (SilcIDListData)id_entry;
1462 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1463 SILC_IDLIST_STATUS_LOCAL);
1464 idata->sconn = sconn;
1467 server->stat.my_routers++;
1468 if (server->server_type == SILC_ROUTER)
1469 server->stat.routers++;
1470 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1472 if (!sconn->backup) {
1473 /* Mark this router our primary router if we're still standalone */
1474 if (server->standalone) {
1475 SILC_LOG_DEBUG(("This connection is our primary router"));
1476 server->id_entry->router = id_entry;
1477 server->router = id_entry;
1478 server->router->server_type = SILC_ROUTER;
1479 server->standalone = FALSE;
1480 server->backup_primary = FALSE;
1482 /* Announce data if we are not backup router (unless not as primary
1483 currently). Backup router announces later at the end of
1484 resuming protocol. */
1485 if (server->backup_router && server->server_type == SILC_ROUTER) {
1486 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1488 /* If we are router then announce our possible servers. Backup
1489 router announces also global servers. */
1490 if (server->server_type == SILC_ROUTER)
1491 silc_server_announce_servers(server,
1492 server->backup_router ? TRUE : FALSE,
1493 0, SILC_PRIMARY_ROUTE(server));
1495 /* Announce our clients and channels to the router */
1496 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1497 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1500 /* If we are backup router then this primary router is whom we are
1502 if (server->server_type == SILC_BACKUP_ROUTER) {
1503 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1505 NULL, NULL, &ip, NULL);
1506 silc_server_backup_add(server, server->id_entry, ip,
1507 sconn->remote_port, TRUE);
1512 /* We already have primary router. Disconnect this connection */
1513 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1514 silc_idlist_del_server(server->global_list, id_entry);
1515 if (sconn->callback)
1516 (*sconn->callback)(server, NULL, sconn->callback_context);
1517 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1518 silc_server_disconnect_remote(server, sconn->sock,
1519 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1524 /* Add this server to be our backup router */
1525 id_entry->server_type = SILC_BACKUP_ROUTER;
1526 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1527 sconn->backup_replace_port, FALSE);
1533 if (sconn->callback)
1534 (*sconn->callback)(server, NULL, sconn->callback_context);
1535 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1536 silc_server_disconnect_remote(server, sconn->sock,
1537 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1541 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1543 conn = sconn->conn.ref_ptr;
1544 param = &server->config->param;
1545 if (conn && conn->param)
1546 param = conn->param;
1548 /* Register rekey timeout */
1549 sconn->rekey_timeout = param->key_exchange_rekey;
1550 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1551 sconn->sock, sconn->rekey_timeout, 0);
1553 /* Set the entry as packet stream context */
1554 silc_packet_set_context(sconn->sock, id_entry);
1556 /* Call the completion callback to indicate that we've connected to
1558 if (sconn && sconn->callback)
1559 (*sconn->callback)(server, id_entry, sconn->callback_context);
1561 if (sconn == server->router_conn)
1562 server->router_conn = NULL;
1567 /* SKE completion callback */
1569 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1570 SilcSKESecurityProperties prop,
1571 SilcSKEKeyMaterial keymat,
1572 SilcSKERekeyMaterial rekey,
1575 SilcPacketStream sock = context;
1576 SilcUnknownEntry entry = silc_packet_get_context(sock);
1577 SilcServerConnection sconn = entry->data.sconn;
1578 SilcServer server = entry->server;
1579 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1580 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1581 void *auth_data = NULL;
1582 SilcUInt32 auth_data_len = 0;
1583 SilcConnAuth connauth;
1584 SilcCipher send_key, receive_key;
1585 SilcHmac hmac_send, hmac_receive;
1588 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1592 if (status != SILC_SKE_STATUS_OK) {
1594 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1595 silc_ske_map_status(status), entry->hostname, entry->ip));
1597 /* XXX retry connecting */
1599 if (sconn->callback)
1600 (*sconn->callback)(server, NULL, sconn->callback_context);
1601 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1602 silc_server_disconnect_remote(server, sconn->sock,
1603 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1607 SILC_LOG_DEBUG(("Setting keys into use"));
1609 /* Set the keys into use. The data will be encrypted after this. */
1610 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1611 &hmac_send, &hmac_receive, &hash)) {
1613 /* XXX retry connecting */
1615 /* Error setting keys */
1617 if (sconn->callback)
1618 (*sconn->callback)(server, NULL, sconn->callback_context);
1619 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1620 silc_server_disconnect_remote(server, sconn->sock,
1621 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1624 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1625 hmac_receive, FALSE);
1627 SILC_LOG_DEBUG(("Starting connection authentication"));
1629 connauth = silc_connauth_alloc(server->schedule, ske,
1630 server->config->conn_auth_timeout);
1632 /* XXX retry connecting */
1634 /** Error allocating auth protocol */
1636 if (sconn->callback)
1637 (*sconn->callback)(server, NULL, sconn->callback_context);
1638 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1639 silc_server_disconnect_remote(server, sconn->sock,
1640 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1644 /* Get authentication method */
1646 if (conn->passphrase) {
1647 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1648 auth_meth = SILC_AUTH_PUBLIC_KEY;
1649 auth_data = server->private_key;
1651 auth_meth = SILC_AUTH_PASSWORD;
1652 auth_data = conn->passphrase;
1653 auth_data_len = conn->passphrase_len;
1656 auth_meth = SILC_AUTH_PUBLIC_KEY;
1657 auth_data = server->private_key;
1661 entry->data.rekey = rekey;
1663 /* Start connection authentication */
1665 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1666 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1667 auth_data, auth_data_len,
1668 silc_server_ke_auth_compl, sconn);
1671 /* Function that is called when the network connection to a router has
1672 been established. This will continue with the key exchange protocol
1673 with the remote router. */
1675 void silc_server_start_key_exchange(SilcServerConnection sconn)
1677 SilcServer server = sconn->server;
1678 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1679 SilcUnknownEntry entry;
1680 SilcSKEParamsStruct params;
1683 /* Cancel any possible retry timeouts */
1684 silc_schedule_task_del_by_context(server->schedule, sconn);
1686 /* Create packet stream */
1687 sconn->sock = silc_packet_stream_create(server->packet_engine,
1688 server->schedule, sconn->stream);
1690 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1691 silc_stream_destroy(sconn->stream);
1692 if (sconn->callback)
1693 (*sconn->callback)(server, NULL, sconn->callback_context);
1694 silc_server_connection_free(sconn);
1697 server->stat.conn_num++;
1699 /* Set source ID to packet stream */
1700 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1702 if (sconn->callback)
1703 (*sconn->callback)(server, NULL, sconn->callback_context);
1704 silc_packet_stream_destroy(sconn->sock);
1705 silc_server_connection_free(sconn);
1709 /* Create entry for remote entity */
1710 entry = silc_calloc(1, sizeof(*entry));
1712 silc_packet_stream_destroy(sconn->sock);
1713 silc_server_connection_free(sconn);
1716 entry->server = server;
1717 entry->data.sconn = sconn;
1718 silc_packet_set_context(sconn->sock, entry);
1720 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1722 /* Set Key Exchange flags from configuration, but fall back to global
1724 memset(¶ms, 0, sizeof(params));
1725 SILC_GET_SKE_FLAGS(conn, params.flags);
1726 if (server->config->param.key_exchange_pfs)
1727 params.flags |= SILC_SKE_SP_FLAG_PFS;
1729 /* Start SILC Key Exchange protocol */
1730 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1731 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1732 server->public_key, server->private_key, sconn);
1735 if (sconn->callback)
1736 (*sconn->callback)(server, NULL, sconn->callback_context);
1737 silc_packet_stream_destroy(sconn->sock);
1738 silc_server_connection_free(sconn);
1741 silc_ske_set_callbacks(ske, silc_server_verify_key,
1742 silc_server_ke_completed, sconn->sock);
1744 /* Start key exchange protocol */
1745 params.version = silc_version_string;
1746 params.timeout_secs = server->config->key_exchange_timeout;
1747 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1750 /* Timeout callback that will be called to retry connecting to remote
1751 router. This is used by both normal and router server. This will wait
1752 before retrying the connecting. The timeout is generated by exponential
1753 backoff algorithm. */
1755 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1757 SilcServerConnection sconn = context;
1758 SilcServer server = sconn->server;
1759 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1760 SilcServerConfigConnParams *param =
1761 (conn->param ? conn->param : &server->config->param);
1763 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1764 sconn->remote_port));
1766 /* Calculate next timeout */
1767 if (sconn->retry_count >= 1) {
1768 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1769 if (sconn->retry_timeout > param->reconnect_interval_max)
1770 sconn->retry_timeout = param->reconnect_interval_max;
1772 sconn->retry_timeout = param->reconnect_interval;
1774 sconn->retry_count++;
1775 sconn->retry_timeout = sconn->retry_timeout +
1776 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1778 /* If we've reached max retry count, give up. */
1779 if ((sconn->retry_count > param->reconnect_count) &&
1780 !param->reconnect_keep_trying) {
1781 SILC_LOG_ERROR(("Could not connect, giving up"));
1783 if (sconn->callback)
1784 (*sconn->callback)(server, NULL, sconn->callback_context);
1785 silc_server_connection_free(sconn);
1789 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1791 /* We will lookup a fresh pointer later */
1792 silc_server_config_unref(&sconn->conn);
1794 /* Wait before retrying */
1795 silc_schedule_task_del_by_context(server->schedule, sconn);
1796 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1797 sconn, sconn->retry_timeout, 0);
1800 /* Callback for async connection to remote router */
1802 static void silc_server_connection_established(SilcNetStatus status,
1806 SilcServerConnection sconn = context;
1807 SilcServer server = sconn->server;
1809 silc_schedule_task_del_by_context(server->schedule, sconn);
1814 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1815 sconn->remote_host, sconn->remote_port));
1817 /* Continue with key exchange protocol */
1818 sconn->stream = stream;
1819 silc_server_start_key_exchange(sconn);
1822 case SILC_NET_UNKNOWN_IP:
1823 case SILC_NET_UNKNOWN_HOST:
1824 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1825 sconn->remote_host, sconn->remote_port,
1826 silc_net_get_error_string(status)));
1828 if (sconn->callback)
1829 (*sconn->callback)(server, NULL, sconn->callback_context);
1830 silc_server_connection_free(sconn);
1834 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1835 sconn->remote_host, sconn->remote_port,
1836 silc_net_get_error_string(status)));
1837 if (!sconn->no_reconnect) {
1838 silc_schedule_task_add_timeout(sconn->server->schedule,
1839 silc_server_connect_to_router_retry,
1841 silc_dlist_del(server->conns, sconn);
1843 if (sconn->callback)
1844 (*sconn->callback)(server, NULL, sconn->callback_context);
1845 silc_server_connection_free(sconn);
1851 /* Generic routine to use connect to a router. */
1853 SILC_TASK_CALLBACK(silc_server_connect_router)
1855 SilcServerConnection sconn = context;
1856 SilcServer server = sconn->server;
1857 SilcServerConfigRouter *rconn;
1859 silc_schedule_task_del_by_context(server->schedule, sconn);
1861 /* Don't connect if we are shutting down. */
1862 if (server->server_shutdown) {
1863 if (sconn->callback)
1864 (*sconn->callback)(server, NULL, sconn->callback_context);
1865 silc_server_connection_free(sconn);
1869 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1870 (sconn->backup ? "backup router" : "router"),
1871 sconn->remote_host, sconn->remote_port));
1873 if (!sconn->no_conf) {
1874 /* Find connection configuration */
1875 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1876 sconn->remote_port);
1878 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1879 (sconn->backup ? "backup router" : "router"),
1880 sconn->remote_host, sconn->remote_port));
1881 silc_server_connection_free(sconn);
1884 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1887 /* Connect to remote host */
1889 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1890 server->config->server_info->primary->server_ip),
1891 sconn->remote_host, sconn->remote_port,
1892 server->schedule, silc_server_connection_established,
1895 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1896 sconn->remote_host, sconn->remote_port));
1897 silc_server_connection_free(sconn);
1901 /* Add to connection list */
1902 silc_dlist_add(server->conns, sconn);
1905 /* This function connects to our primary router or if we are a router this
1906 establishes all our primary routes. This is called at the start of the
1907 server to do authentication and key exchange with our router - called
1910 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1912 SilcServer server = context;
1913 SilcServerConnection sconn;
1914 SilcServerConfigRouter *ptr;
1916 /* Don't connect if we are shutting down. */
1917 if (server->server_shutdown)
1920 SILC_LOG_DEBUG(("We are %s",
1921 (server->server_type == SILC_SERVER ?
1922 "normal server" : server->server_type == SILC_ROUTER ?
1923 "router" : "backup router/normal server")));
1925 if (!server->config->routers) {
1926 /* There wasn't a configured router, we will continue but we don't
1927 have a connection to outside world. We will be standalone server. */
1928 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1929 server->standalone = TRUE;
1933 /* Cancel any possible retry timeouts */
1934 silc_schedule_task_del_by_callback(server->schedule,
1935 silc_server_connect_router);
1936 silc_schedule_task_del_by_callback(server->schedule,
1937 silc_server_connect_to_router_retry);
1939 /* Create the connections to all our routes */
1940 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1942 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1943 ptr->backup_router ? "Backup router" : "Router",
1944 ptr->initiator ? "Initiator" : "Responder",
1945 ptr->host, ptr->port));
1947 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1948 ptr->initiator == FALSE && !server->backup_router &&
1949 !silc_server_config_get_backup_router(server))
1950 server->wait_backup = TRUE;
1952 if (!ptr->initiator)
1954 if (ptr->dynamic_connection)
1957 /* Check whether we are connecting or connected to this host already */
1958 if (silc_server_num_sockets_by_remote(server,
1959 silc_net_is_ip(ptr->host) ?
1961 silc_net_is_ip(ptr->host) ?
1962 NULL : ptr->host, ptr->port,
1963 SILC_CONN_ROUTER)) {
1964 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1965 ptr->host, ptr->port));
1967 /* If we don't have primary router and this connection is our
1968 primary router we are in desync. Reconnect to the primary. */
1969 if (server->standalone && !server->router) {
1971 SilcPacketStream sock;
1972 SilcServerConfigRouter *primary =
1973 silc_server_config_get_primary_router(server);
1976 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1977 ptr->host, ptr->port);
1980 server->backup_noswitch = TRUE;
1981 silc_server_free_sock_user_data(server, sock, NULL);
1982 silc_server_disconnect_remote(server, sock, 0, NULL);
1983 server->backup_noswitch = FALSE;
1984 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1990 /* Allocate connection object for hold connection specific stuff. */
1991 sconn = silc_calloc(1, sizeof(*sconn));
1994 sconn->server = server;
1995 sconn->remote_host = strdup(ptr->host);
1996 sconn->remote_port = ptr->port;
1997 sconn->backup = ptr->backup_router;
1998 if (sconn->backup) {
1999 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2000 sconn->backup_replace_port = ptr->backup_replace_port;
2003 SILC_LOG_DEBUG(("Created connection %p", sconn));
2005 if (!server->router_conn && !sconn->backup)
2006 server->router_conn = sconn;
2009 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2015 /************************ Accepting new connection **************************/
2017 /* After this is called, server don't wait for backup router anymore.
2018 This gets called automatically even after we have backup router
2019 connection established. */
2021 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2023 SilcServer server = context;
2024 server->wait_backup = FALSE;
2027 /* Authentication data callback */
2030 silc_server_accept_get_auth(SilcConnAuth connauth,
2031 SilcConnectionType conn_type,
2032 unsigned char **passphrase,
2033 SilcUInt32 *passphrase_len,
2034 SilcSKR *repository,
2037 SilcPacketStream sock = context;
2038 SilcUnknownEntry entry = silc_packet_get_context(sock);
2039 SilcServer server = entry->server;
2041 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2043 /* Remote end is client */
2044 if (conn_type == SILC_CONN_CLIENT) {
2045 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2049 *passphrase = cconfig->passphrase;
2050 *passphrase_len = cconfig->passphrase_len;
2051 if (cconfig->publickeys)
2052 *repository = server->repository;
2054 if (cconfig->publickeys) {
2055 if (server->config->prefer_passphrase_auth) {
2059 *passphrase_len = 0;
2063 entry->conn_type = conn_type;
2067 /* Remote end is server */
2068 if (conn_type == SILC_CONN_SERVER) {
2069 SilcServerConfigServer *sconfig;
2071 /* If we are normal server, don't accept the connection */
2072 if (server->server_type == SILC_SERVER)
2075 sconfig = entry->sconfig.ref_ptr;
2079 *passphrase = sconfig->passphrase;
2080 *passphrase_len = sconfig->passphrase_len;
2081 if (sconfig->publickeys)
2082 *repository = server->repository;
2084 if (sconfig->publickeys) {
2085 if (server->config->prefer_passphrase_auth) {
2089 *passphrase_len = 0;
2093 entry->conn_type = conn_type;
2097 /* Remote end is router */
2098 if (conn_type == SILC_CONN_ROUTER) {
2099 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2103 *passphrase = rconfig->passphrase;
2104 *passphrase_len = rconfig->passphrase_len;
2105 if (rconfig->publickeys)
2106 *repository = server->repository;
2108 if (rconfig->publickeys) {
2109 if (server->config->prefer_passphrase_auth) {
2113 *passphrase_len = 0;
2117 entry->conn_type = conn_type;
2124 /* Authentication completion callback. */
2127 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2130 SilcPacketStream sock = context;
2131 SilcUnknownEntry entry = silc_packet_get_context(sock);
2132 SilcIDListData idata = (SilcIDListData)entry;
2133 SilcServer server = entry->server;
2134 SilcServerConfigConnParams *param = &server->config->param;
2135 SilcServerConnection sconn;
2137 const char *hostname, *ip;
2141 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2142 NULL, &hostname, &ip, &port);
2144 if (success == FALSE) {
2145 /* Authentication failed */
2146 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2147 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2148 server->stat.auth_failures++;
2149 silc_server_disconnect_remote(server, sock,
2150 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2151 silc_server_config_unref(&entry->cconfig);
2152 silc_server_config_unref(&entry->sconfig);
2153 silc_server_config_unref(&entry->rconfig);
2154 silc_server_free_sock_user_data(server, sock, NULL);
2158 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2160 switch (entry->conn_type) {
2161 case SILC_CONN_CLIENT:
2163 SilcClientEntry client;
2164 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2166 /* Verify whether this connection is after all allowed to connect */
2167 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2168 &server->config->param,
2170 silc_connauth_get_ske(connauth))) {
2171 server->stat.auth_failures++;
2175 /* If we are primary router and we have backup router configured
2176 but it has not connected to use yet, do not accept any other
2178 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2179 !server->backup_router) {
2180 SilcServerConfigRouter *router;
2181 router = silc_server_config_get_backup_router(server);
2182 if (router && strcmp(server->config->server_info->primary->server_ip,
2184 silc_server_find_socket_by_host(server,
2186 router->backup_replace_ip, 0)) {
2187 SILC_LOG_INFO(("Will not accept connections because we do "
2188 "not have backup router connection established"));
2189 silc_server_disconnect_remote(server, sock,
2190 SILC_STATUS_ERR_PERM_DENIED,
2191 "We do not have connection to backup "
2192 "router established, try later");
2193 silc_server_config_unref(&entry->cconfig);
2194 silc_server_config_unref(&entry->sconfig);
2195 silc_server_config_unref(&entry->rconfig);
2196 silc_server_free_sock_user_data(server, sock, NULL);
2197 server->stat.auth_failures++;
2199 /* From here on, wait 20 seconds for the backup router to appear. */
2200 silc_schedule_task_add_timeout(server->schedule,
2201 silc_server_backup_router_wait,
2202 (void *)server, 20, 0);
2207 SILC_LOG_DEBUG(("Remote host is client"));
2208 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2211 /* Add the client to the client ID cache. The nickname and Client ID
2212 and other information is created after we have received NEW_CLIENT
2213 packet from client. */
2214 client = silc_idlist_add_client(server->local_list,
2215 NULL, NULL, NULL, NULL, NULL, sock);
2217 SILC_LOG_ERROR(("Could not add new client to cache"));
2218 server->stat.auth_failures++;
2219 silc_server_disconnect_remote(server, sock,
2220 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2221 silc_server_config_unref(&entry->cconfig);
2222 silc_server_config_unref(&entry->sconfig);
2223 silc_server_config_unref(&entry->rconfig);
2224 silc_server_free_sock_user_data(server, sock, NULL);
2227 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2228 entry->data.conn_type = SILC_CONN_CLIENT;
2231 server->stat.my_clients++;
2232 server->stat.clients++;
2233 server->stat.cell_clients++;
2235 /* Get connection parameters */
2237 param = conn->param;
2239 if (!param->keepalive_secs)
2240 param->keepalive_secs = server->config->param.keepalive_secs;
2242 if (!param->qos && server->config->param.qos) {
2243 param->qos = server->config->param.qos;
2244 param->qos_rate_limit = server->config->param.qos_rate_limit;
2245 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2246 param->qos_limit_sec = server->config->param.qos_limit_sec;
2247 param->qos_limit_usec = server->config->param.qos_limit_usec;
2250 /* Check if to be anonymous connection */
2251 if (param->anonymous)
2252 client->mode |= SILC_UMODE_ANONYMOUS;
2255 /* Add public key to repository */
2256 SILC_LOG_DEBUG(("Add client public key to repository"));
2257 if (!silc_server_get_public_key_by_client(server, client, NULL))
2258 silc_skr_add_public_key_simple(server->repository,
2259 entry->data.public_key,
2260 SILC_SKR_USAGE_IDENTIFICATION, client,
2263 id_entry = (void *)client;
2267 case SILC_CONN_SERVER:
2268 case SILC_CONN_ROUTER:
2270 SilcServerEntry new_server;
2271 SilcBool initiator = FALSE;
2272 SilcBool backup_local = FALSE;
2273 SilcBool backup_router = FALSE;
2274 char *backup_replace_ip = NULL;
2275 SilcUInt16 backup_replace_port = 0;
2276 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2277 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2279 /* If we are backup router and this is incoming server connection
2280 and we do not have connection to primary router, do not allow
2282 if (server->server_type == SILC_BACKUP_ROUTER &&
2283 entry->conn_type == SILC_CONN_SERVER &&
2284 !SILC_PRIMARY_ROUTE(server)) {
2285 SILC_LOG_INFO(("Will not accept server connection because we do "
2286 "not have primary router connection established"));
2287 silc_server_disconnect_remote(server, sock,
2288 SILC_STATUS_ERR_PERM_DENIED,
2289 "We do not have connection to primary "
2290 "router established, try later");
2291 silc_server_config_unref(&entry->cconfig);
2292 silc_server_config_unref(&entry->sconfig);
2293 silc_server_config_unref(&entry->rconfig);
2294 silc_server_free_sock_user_data(server, sock, NULL);
2295 server->stat.auth_failures++;
2299 if (entry->conn_type == SILC_CONN_ROUTER) {
2300 /* Verify whether this connection is after all allowed to connect */
2301 if (!silc_server_connection_allowed(server, sock,
2303 &server->config->param,
2304 rconn ? rconn->param : NULL,
2305 silc_connauth_get_ske(connauth))) {
2306 silc_server_config_unref(&entry->cconfig);
2307 silc_server_config_unref(&entry->sconfig);
2308 silc_server_config_unref(&entry->rconfig);
2309 server->stat.auth_failures++;
2315 param = rconn->param;
2317 if (!param->keepalive_secs)
2318 param->keepalive_secs = server->config->param.keepalive_secs;
2320 if (!param->qos && server->config->param.qos) {
2321 param->qos = server->config->param.qos;
2322 param->qos_rate_limit = server->config->param.qos_rate_limit;
2323 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2324 param->qos_limit_sec = server->config->param.qos_limit_sec;
2325 param->qos_limit_usec = server->config->param.qos_limit_usec;
2329 initiator = rconn->initiator;
2330 backup_local = rconn->backup_local;
2331 backup_router = rconn->backup_router;
2332 backup_replace_ip = rconn->backup_replace_ip;
2333 backup_replace_port = rconn->backup_replace_port;
2337 if (entry->conn_type == SILC_CONN_SERVER) {
2338 /* Verify whether this connection is after all allowed to connect */
2339 if (!silc_server_connection_allowed(server, sock,
2341 &server->config->param,
2342 srvconn ? srvconn->param : NULL,
2343 silc_connauth_get_ske(connauth))) {
2344 server->stat.auth_failures++;
2348 if (srvconn->param) {
2349 param = srvconn->param;
2351 if (!param->keepalive_secs)
2352 param->keepalive_secs = server->config->param.keepalive_secs;
2354 if (!param->qos && server->config->param.qos) {
2355 param->qos = server->config->param.qos;
2356 param->qos_rate_limit = server->config->param.qos_rate_limit;
2357 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2358 param->qos_limit_sec = server->config->param.qos_limit_sec;
2359 param->qos_limit_usec = server->config->param.qos_limit_usec;
2363 backup_router = srvconn->backup_router;
2367 /* If we are primary router and we have backup router configured
2368 but it has not connected to use yet, do not accept any other
2370 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2371 !server->backup_router && !backup_router) {
2372 SilcServerConfigRouter *router;
2373 router = silc_server_config_get_backup_router(server);
2374 if (router && strcmp(server->config->server_info->primary->server_ip,
2376 silc_server_find_socket_by_host(server,
2378 router->backup_replace_ip, 0)) {
2379 SILC_LOG_INFO(("Will not accept connections because we do "
2380 "not have backup router connection established"));
2381 silc_server_disconnect_remote(server, sock,
2382 SILC_STATUS_ERR_PERM_DENIED,
2383 "We do not have connection to backup "
2384 "router established, try later");
2385 silc_server_config_unref(&entry->cconfig);
2386 silc_server_config_unref(&entry->sconfig);
2387 silc_server_config_unref(&entry->rconfig);
2388 silc_server_free_sock_user_data(server, sock, NULL);
2389 server->stat.auth_failures++;
2391 /* From here on, wait 20 seconds for the backup router to appear. */
2392 silc_schedule_task_add_timeout(server->schedule,
2393 silc_server_backup_router_wait,
2394 (void *)server, 20, 0);
2399 SILC_LOG_DEBUG(("Remote host is %s",
2400 entry->conn_type == SILC_CONN_SERVER ?
2401 "server" : (backup_router ?
2402 "backup router" : "router")));
2403 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2404 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2405 "server" : (backup_router ?
2406 "backup router" : "router")));
2408 /* Add the server into server cache. The server name and Server ID
2409 is updated after we have received NEW_SERVER packet from the
2410 server. We mark ourselves as router for this server if we really
2413 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2414 server->local_list : (backup_router ?
2415 server->local_list :
2416 server->global_list)),
2418 (entry->conn_type == SILC_CONN_SERVER ?
2419 SILC_SERVER : SILC_ROUTER),
2421 (entry->conn_type == SILC_CONN_SERVER ?
2422 server->id_entry : (backup_router ?
2423 server->id_entry : NULL)),
2426 SILC_LOG_ERROR(("Could not add new server to cache"));
2427 silc_server_disconnect_remote(server, sock,
2428 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2429 silc_server_config_unref(&entry->cconfig);
2430 silc_server_config_unref(&entry->sconfig);
2431 silc_server_config_unref(&entry->rconfig);
2432 silc_server_free_sock_user_data(server, sock, NULL);
2433 server->stat.auth_failures++;
2436 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2437 entry->data.conn_type = entry->conn_type;
2439 id_entry = (void *)new_server;
2441 /* If the incoming connection is router and marked as backup router
2442 then add it to be one of our backups */
2443 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2444 /* Change it back to SERVER type since that's what it really is. */
2446 entry->data.conn_type = SILC_CONN_SERVER;
2447 new_server->server_type = SILC_BACKUP_ROUTER;
2449 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2450 ("Backup router %s is now online",
2453 /* Remove the backup waiting with timeout */
2454 silc_schedule_task_add_timeout(server->schedule,
2455 silc_server_backup_router_wait,
2456 (void *)server, 10, 0);
2460 if (entry->data.conn_type == SILC_CONN_SERVER) {
2461 server->stat.my_servers++;
2462 server->stat.servers++;
2463 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2465 server->stat.my_routers++;
2466 server->stat.routers++;
2467 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2470 /* Check whether this connection is to be our primary router connection
2471 if we do not already have the primary route. */
2472 if (!backup_router &&
2473 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2474 if (silc_server_config_is_primary_route(server) && !initiator)
2477 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2478 server->standalone = FALSE;
2479 if (!server->id_entry->router) {
2480 server->id_entry->router = id_entry;
2481 server->router = id_entry;
2493 /* Add connection to server->conns so that we know we have connection
2495 sconn = silc_calloc(1, sizeof(*sconn));
2496 sconn->server = server;
2498 sconn->remote_host = strdup(hostname);
2499 sconn->remote_port = port;
2500 silc_dlist_add(server->conns, sconn);
2501 idata->sconn = sconn;
2502 idata->last_receive = time(NULL);
2504 /* Add the common data structure to the ID entry. */
2505 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2506 silc_packet_set_context(sock, id_entry);
2508 /* Connection has been fully established now. Everything is ok. */
2509 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2511 /* Perform Quality of Service */
2513 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2514 param->qos_rate_limit, param->qos_bytes_limit,
2515 param->qos_limit_sec, param->qos_limit_usec);
2517 silc_server_config_unref(&entry->cconfig);
2518 silc_server_config_unref(&entry->sconfig);
2519 silc_server_config_unref(&entry->rconfig);
2523 silc_ske_free(silc_connauth_get_ske(connauth));
2524 silc_connauth_free(connauth);
2527 /* SKE completion callback. We set the new keys into use here. */
2530 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2531 SilcSKESecurityProperties prop,
2532 SilcSKEKeyMaterial keymat,
2533 SilcSKERekeyMaterial rekey,
2536 SilcPacketStream sock = context;
2537 SilcUnknownEntry entry = silc_packet_get_context(sock);
2538 SilcIDListData idata = (SilcIDListData)entry;
2539 SilcServer server = entry->server;
2540 SilcConnAuth connauth;
2541 SilcCipher send_key, receive_key;
2542 SilcHmac hmac_send, hmac_receive;
2549 if (status != SILC_SKE_STATUS_OK) {
2551 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2552 silc_ske_map_status(status), entry->hostname, entry->ip));
2554 silc_server_disconnect_remote(server, sock,
2555 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2556 silc_server_config_unref(&entry->cconfig);
2557 silc_server_config_unref(&entry->sconfig);
2558 silc_server_config_unref(&entry->rconfig);
2559 silc_server_free_sock_user_data(server, sock, NULL);
2563 SILC_LOG_DEBUG(("Setting keys into use"));
2565 /* Set the keys into use. The data will be encrypted after this. */
2566 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2567 &hmac_send, &hmac_receive, &hash)) {
2568 /* Error setting keys */
2570 silc_server_disconnect_remote(server, sock,
2571 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2572 silc_server_free_sock_user_data(server, sock, NULL);
2575 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2576 hmac_receive, FALSE);
2578 idata->rekey = rekey;
2579 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2580 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2581 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2583 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2585 SILC_LOG_DEBUG(("Starting connection authentication"));
2586 server->stat.auth_attempts++;
2588 connauth = silc_connauth_alloc(server->schedule, ske,
2589 server->config->conn_auth_timeout);
2591 /** Error allocating auth protocol */
2593 silc_server_disconnect_remote(server, sock,
2594 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2595 silc_server_config_unref(&entry->cconfig);
2596 silc_server_config_unref(&entry->sconfig);
2597 silc_server_config_unref(&entry->rconfig);
2598 silc_server_free_sock_user_data(server, sock, NULL);
2602 /* Start connection authentication */
2604 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2605 silc_server_accept_auth_compl, sock);
2608 /* Accept new TCP connection */
2610 static void silc_server_accept_new_connection(SilcNetStatus status,
2614 SilcServer server = context;
2615 SilcPacketStream packet_stream;
2616 SilcServerConfigClient *cconfig = NULL;
2617 SilcServerConfigServer *sconfig = NULL;
2618 SilcServerConfigRouter *rconfig = NULL;
2619 SilcServerConfigDeny *deny;
2620 SilcUnknownEntry entry;
2622 SilcSKEParamsStruct params;
2623 char *hostname, *ip;
2626 SILC_LOG_DEBUG(("Accepting new connection"));
2628 /* Check for maximum allowed connections */
2629 server->stat.conn_attempts++;
2630 if (silc_dlist_count(server->conns) >
2631 server->config->param.connections_max) {
2632 SILC_LOG_ERROR(("Refusing connection, server is full"));
2633 server->stat.conn_failures++;
2634 silc_stream_destroy(stream);
2638 /* Get hostname, IP and port */
2639 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2640 (const char **)&ip, &port)) {
2641 /* Bad socket stream */
2642 server->stat.conn_failures++;
2643 silc_stream_destroy(stream);
2647 /* Create packet stream */
2648 packet_stream = silc_packet_stream_create(server->packet_engine,
2649 server->schedule, stream);
2650 if (!packet_stream) {
2651 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2652 server->stat.conn_failures++;
2653 silc_stream_destroy(stream);
2656 server->stat.conn_num++;
2658 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2660 /* Set source ID to packet stream */
2661 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2664 server->stat.conn_failures++;
2665 silc_packet_stream_destroy(packet_stream);
2669 /* Check whether this connection is denied to connect to us. */
2670 deny = silc_server_config_find_denied(server, ip);
2672 deny = silc_server_config_find_denied(server, hostname);
2674 /* The connection is denied */
2675 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2676 silc_server_disconnect_remote(server, packet_stream,
2677 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2679 silc_server_free_sock_user_data(server, packet_stream, NULL);
2683 /* Check whether we have configured this sort of connection at all. We
2684 have to check all configurations since we don't know what type of
2685 connection this is. */
2686 if (!(cconfig = silc_server_config_find_client(server, ip)))
2687 cconfig = silc_server_config_find_client(server, hostname);
2688 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2689 sconfig = silc_server_config_find_server_conn(server, hostname);
2690 if (server->server_type == SILC_ROUTER)
2691 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2692 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2693 if (!cconfig && !sconfig && !rconfig) {
2694 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2695 server->stat.conn_failures++;
2696 silc_server_disconnect_remote(server, packet_stream,
2697 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2698 silc_server_free_sock_user_data(server, packet_stream, NULL);
2702 /* The connection is allowed */
2703 entry = silc_calloc(1, sizeof(*entry));
2705 server->stat.conn_failures++;
2706 silc_server_disconnect_remote(server, packet_stream,
2707 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2708 silc_server_free_sock_user_data(server, packet_stream, NULL);
2711 entry->hostname = hostname;
2714 entry->server = server;
2715 entry->data.conn_type = SILC_CONN_UNKNOWN;
2716 silc_packet_set_context(packet_stream, entry);
2718 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2720 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2721 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2722 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2724 /* Take flags for key exchange. Since we do not know what type of connection
2725 this is, we go through all found configurations and use the global ones
2726 as well. This will result always into strictest key exchange flags. */
2727 memset(¶ms, 0, sizeof(params));
2728 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2729 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2730 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2731 if (server->config->param.key_exchange_pfs)
2732 params.flags |= SILC_SKE_SP_FLAG_PFS;
2734 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2735 server->stat.conn_attempts++;
2737 /* Start SILC Key Exchange protocol */
2738 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2739 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2740 server->public_key, server->private_key,
2743 server->stat.conn_failures++;
2744 silc_server_disconnect_remote(server, packet_stream,
2745 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2746 silc_server_free_sock_user_data(server, packet_stream, NULL);
2749 silc_ske_set_callbacks(ske, silc_server_verify_key,
2750 silc_server_accept_completed, packet_stream);
2752 /* Start key exchange protocol */
2753 params.version = silc_version_string;
2754 params.timeout_secs = server->config->key_exchange_timeout;
2755 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2759 /********************************** Rekey ***********************************/
2761 /* Initiator rekey completion callback */
2763 static void silc_server_rekey_completion(SilcSKE ske,
2764 SilcSKEStatus status,
2765 const SilcSKESecurityProperties prop,
2766 const SilcSKEKeyMaterial keymat,
2767 SilcSKERekeyMaterial rekey,
2770 SilcPacketStream sock = context;
2771 SilcIDListData idata = silc_packet_get_context(sock);
2772 SilcServer server = idata->sconn->server;
2774 idata->sconn->op = NULL;
2775 if (status != SILC_SKE_STATUS_OK) {
2776 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2777 idata->sconn->remote_host));
2781 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2782 idata->sconn->remote_host, idata->sconn->remote_port,
2783 SILC_CONNTYPE_STRING(idata->conn_type)));
2785 /* Save rekey data for next rekey */
2786 idata->rekey = rekey;
2788 /* Register new rekey timeout */
2789 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2790 sock, idata->sconn->rekey_timeout, 0);
2793 /* Rekey callback. Start rekey as initiator */
2795 SILC_TASK_CALLBACK(silc_server_do_rekey)
2797 SilcServer server = app_context;
2798 SilcPacketStream sock = context;
2799 SilcIDListData idata = silc_packet_get_context(sock);
2802 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2804 /* Do not execute rekey with disabled connections */
2805 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2808 /* If another protocol is active do not start rekey */
2809 if (idata->sconn->op) {
2810 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2811 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2816 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2817 idata->sconn->remote_host, idata->sconn->remote_port,
2818 SILC_CONNTYPE_STRING(idata->conn_type)));
2821 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2822 server->public_key, NULL, sock);
2826 /* Set SKE callbacks */
2827 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2830 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2833 /* Responder rekey completion callback */
2836 silc_server_rekey_resp_completion(SilcSKE ske,
2837 SilcSKEStatus status,
2838 const SilcSKESecurityProperties prop,
2839 const SilcSKEKeyMaterial keymat,
2840 SilcSKERekeyMaterial rekey,
2843 SilcPacketStream sock = context;
2844 SilcIDListData idata = silc_packet_get_context(sock);
2846 idata->sconn->op = NULL;
2847 if (status != SILC_SKE_STATUS_OK) {
2848 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2849 idata->sconn->remote_host));
2853 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2854 idata->sconn->remote_host, idata->sconn->remote_port,
2855 SILC_CONNTYPE_STRING(idata->conn_type)));
2857 /* Save rekey data for next rekey */
2858 idata->rekey = rekey;
2861 /* Start rekey as responder */
2863 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2866 SilcIDListData idata = silc_packet_get_context(sock);
2869 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2870 idata->sconn->remote_host, idata->sconn->remote_port,
2871 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2874 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2875 server->public_key, NULL, sock);
2877 silc_packet_free(packet);
2881 /* Set SKE callbacks */
2882 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2885 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2890 /****************************** Disconnection *******************************/
2892 /* Destroys packet stream. */
2894 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2896 silc_packet_stream_unref(context);
2899 /* Closes connection to socket connection */
2901 void silc_server_close_connection(SilcServer server,
2902 SilcPacketStream sock)
2904 SilcIDListData idata = silc_packet_get_context(sock);
2906 const char *hostname;
2909 if (!silc_packet_stream_is_valid(sock))
2912 memset(tmp, 0, sizeof(tmp));
2913 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2914 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2915 NULL, &hostname, NULL, &port);
2916 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2917 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2918 tmp[0] ? tmp : ""));
2920 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2922 if (idata && idata->sconn) {
2923 silc_server_connection_free(idata->sconn);
2924 idata->sconn = NULL;
2927 /* Take a reference and then destroy the stream. The last reference
2928 is released later in a timeout callback. */
2929 silc_packet_stream_ref(sock);
2930 silc_packet_stream_destroy(sock);
2932 /* Close connection with timeout */
2933 server->stat.conn_num--;
2934 silc_schedule_task_del_by_all(server->schedule, 0,
2935 silc_server_close_connection_final, sock);
2936 silc_schedule_task_add_timeout(server->schedule,
2937 silc_server_close_connection_final,
2941 /* Sends disconnect message to remote connection and disconnects the
2944 void silc_server_disconnect_remote(SilcServer server,
2945 SilcPacketStream sock,
2946 SilcStatus status, ...)
2948 unsigned char buf[512];
2955 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
2957 va_start(ap, status);
2958 cp = va_arg(ap, char *);
2960 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2963 /* Send SILC_PACKET_DISCONNECT */
2964 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2965 SILC_STR_UI_CHAR(status),
2966 SILC_STR_UI8_STRING(cp ? buf : NULL),
2969 /* Close connection */
2970 silc_server_close_connection(server, sock);
2973 /* Frees client data and notifies about client's signoff. */
2975 void silc_server_free_client_data(SilcServer server,
2976 SilcPacketStream sock,
2977 SilcClientEntry client,
2979 const char *signoff)
2981 SILC_LOG_DEBUG(("Freeing client %p data", client));
2984 /* Check if anyone is watching this nickname */
2985 if (server->server_type == SILC_ROUTER)
2986 silc_server_check_watcher_list(server, client, NULL,
2987 SILC_NOTIFY_TYPE_SIGNOFF);
2989 /* Send SIGNOFF notify to routers. */
2991 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2992 SILC_BROADCAST(server), client->id,
2996 /* Remove client from all channels */
2998 silc_server_remove_from_channels(server, NULL, client,
2999 TRUE, (char *)signoff, TRUE, FALSE);
3001 silc_server_remove_from_channels(server, NULL, client,
3002 FALSE, NULL, FALSE, FALSE);
3004 /* Remove this client from watcher list if it is */
3005 silc_server_del_from_watcher_list(server, client);
3007 /* Remove client's public key from repository, this will free it too. */
3008 if (client->data.public_key) {
3009 silc_skr_del_public_key(server->repository, client->data.public_key,
3011 client->data.public_key = NULL;
3014 /* Update statistics */
3015 server->stat.my_clients--;
3016 server->stat.clients--;
3017 if (server->stat.cell_clients)
3018 server->stat.cell_clients--;
3019 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3020 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3021 silc_schedule_task_del_by_context(server->schedule, client);
3023 if (client->data.sconn) {
3024 silc_server_connection_free(client->data.sconn);
3025 client->data.sconn = NULL;
3028 /* We will not delete the client entry right away. We will take it
3029 into history (for WHOWAS command) for 5 minutes, unless we're
3030 shutting down server. */
3031 if (!server->server_shutdown) {
3032 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3034 client->router = NULL;
3035 client->connection = NULL;
3036 client->data.created = silc_time();
3037 silc_dlist_del(server->expired_clients, client);
3038 silc_dlist_add(server->expired_clients, client);
3040 /* Delete directly since we're shutting down server */
3041 SILC_LOG_DEBUG(("Delete client directly"));
3042 silc_idlist_del_data(client);
3043 silc_idlist_del_client(server->local_list, client);
3047 /* Frees user_data pointer from socket connection object. This also sends
3048 appropriate notify packets to the network to inform about leaving
3051 void silc_server_free_sock_user_data(SilcServer server,
3052 SilcPacketStream sock,
3053 const char *signoff_message)
3055 SilcIDListData idata;
3062 SILC_LOG_DEBUG(("Start, sock %p", sock));
3064 idata = silc_packet_get_context(sock);
3068 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3071 /* Cancel active protocols */
3073 if (idata->sconn && idata->sconn->op) {
3074 SILC_LOG_DEBUG(("Abort active protocol"));
3075 silc_async_abort(idata->sconn->op, NULL, NULL);
3077 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3078 ((SilcUnknownEntry)idata)->op) {
3079 SILC_LOG_DEBUG(("Abort active protocol"));
3080 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3084 switch (idata->conn_type) {
3085 case SILC_CONN_CLIENT:
3087 SilcClientEntry client_entry = (SilcClientEntry)idata;
3088 silc_server_free_client_data(server, sock, client_entry, TRUE,
3090 silc_packet_set_context(sock, NULL);
3094 case SILC_CONN_SERVER:
3095 case SILC_CONN_ROUTER:
3097 SilcServerEntry user_data = (SilcServerEntry)idata;
3098 SilcServerEntry backup_router = NULL;
3100 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3103 backup_router = silc_server_backup_get(server, user_data->id);
3105 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3106 backup_router == server->id_entry &&
3107 idata->conn_type != SILC_CONN_ROUTER)
3108 backup_router = NULL;
3110 if (server->server_shutdown || server->backup_noswitch)
3111 backup_router = NULL;
3113 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3114 NULL, NULL, &ip, &port);
3116 /* If this was our primary router connection then we're lost to
3117 the outside world. */
3118 if (server->router == user_data) {
3119 /* Check whether we have a backup router connection */
3120 if (!backup_router || backup_router == user_data) {
3121 if (!server->no_reconnect)
3122 silc_server_create_connections(server);
3123 server->id_entry->router = NULL;
3124 server->router = NULL;
3125 server->standalone = TRUE;
3126 server->backup_primary = FALSE;
3127 backup_router = NULL;
3129 if (server->id_entry != backup_router) {
3130 SILC_LOG_INFO(("New primary router is backup router %s",
3131 backup_router->server_name));
3132 server->id_entry->router = backup_router;
3133 server->router = backup_router;
3134 server->router_connect = time(0);
3135 server->backup_primary = TRUE;
3136 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3138 /* Send START_USE to backup router to indicate we have switched */
3139 silc_server_backup_send_start_use(server,
3140 backup_router->connection,
3143 SILC_LOG_INFO(("We are now new primary router in this cell"));
3144 server->id_entry->router = NULL;
3145 server->router = NULL;
3146 server->standalone = TRUE;
3149 /* We stop here to take a breath */
3152 if (server->backup_router) {
3153 server->server_type = SILC_ROUTER;
3155 /* We'll need to constantly try to reconnect to the primary
3156 router so that we'll see when it comes back online. */
3157 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3158 silc_server_backup_connected,
3162 /* Mark this connection as replaced */
3163 silc_server_backup_replaced_add(server, user_data->id,
3166 } else if (backup_router) {
3167 SILC_LOG_INFO(("Enabling the use of backup router %s",
3168 backup_router->server_name));
3170 /* Mark this connection as replaced */
3171 silc_server_backup_replaced_add(server, user_data->id,
3173 } else if (server->server_type == SILC_SERVER &&
3174 idata->conn_type == SILC_CONN_ROUTER) {
3175 /* Reconnect to the router (backup) */
3176 if (!server->no_reconnect)
3177 silc_server_create_connections(server);
3180 if (user_data->server_name)
3181 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3182 ("Server %s signoff", user_data->server_name));
3184 if (!backup_router) {
3185 /* Remove all servers that are originated from this server, and
3186 remove the clients of those servers too. */
3187 silc_server_remove_servers_by_server(server, user_data, TRUE);
3190 /* Remove the clients that this server owns as they will become
3191 invalid now too. For backup router the server is actually
3192 coming from the primary router, so mark that as the owner
3194 if (server->server_type == SILC_BACKUP_ROUTER &&
3195 sock->type == SILC_CONN_SERVER)
3196 silc_server_remove_clients_by_server(server, server->router,
3200 silc_server_remove_clients_by_server(server, user_data,
3203 /* Remove channels owned by this server */
3204 if (server->server_type == SILC_SERVER)
3205 silc_server_remove_channels_by_server(server, user_data);
3207 /* Enable local server connections that may be disabled */
3208 silc_server_local_servers_toggle_enabled(server, TRUE);
3210 /* Update the client entries of this server to the new backup
3211 router. If we are the backup router we also resolve the real
3212 servers for the clients. After updating is over this also
3213 removes the clients that this server explicitly owns. */
3214 silc_server_update_clients_by_server(server, user_data,
3215 backup_router, TRUE);
3217 /* If we are router and just lost our primary router (now standlaone)
3218 we remove everything that was behind it, since we don't know
3220 if (server->server_type == SILC_ROUTER && server->standalone)
3221 /* Remove all servers that are originated from this server, and
3222 remove the clients of those servers too. */
3223 silc_server_remove_servers_by_server(server, user_data, TRUE);
3225 /* Finally remove the clients that are explicitly owned by this
3226 server. They go down with the server. */
3227 silc_server_remove_clients_by_server(server, user_data,
3230 /* Update our server cache to use the new backup router too. */
3231 silc_server_update_servers_by_server(server, user_data, backup_router);
3232 if (server->server_type == SILC_SERVER)
3233 silc_server_update_channels_by_server(server, user_data,
3236 /* Send notify about primary router going down to local operators */
3237 if (server->backup_router)
3238 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3239 SILC_NOTIFY_TYPE_NONE,
3240 ("%s switched to backup router %s "
3241 "(we are primary router now)",
3242 server->server_name, server->server_name));
3243 else if (server->router)
3244 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3245 SILC_NOTIFY_TYPE_NONE,
3246 ("%s switched to backup router %s",
3247 server->server_name,
3248 server->router->server_name));
3250 server->backup_noswitch = FALSE;
3253 silc_server_connection_free(idata->sconn);
3254 idata->sconn = NULL;
3258 if (idata->conn_type == SILC_CONN_SERVER) {
3259 server->stat.my_servers--;
3260 server->stat.servers--;
3261 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3262 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3263 server->stat.my_routers--;
3264 server->stat.routers--;
3265 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3267 if (server->server_type == SILC_ROUTER)
3268 server->stat.cell_servers--;
3270 /* Free the server entry */
3271 silc_server_backup_del(server, user_data);
3272 silc_server_backup_replaced_del(server, user_data);
3273 silc_idlist_del_data(user_data);
3274 if (!silc_idlist_del_server(server->local_list, user_data))
3275 silc_idlist_del_server(server->global_list, user_data);
3277 if (backup_router && backup_router != server->id_entry) {
3278 /* Announce all of our stuff that was created about 5 minutes ago.
3279 The backup router knows all the other stuff already. */
3280 if (server->server_type == SILC_ROUTER)
3281 silc_server_announce_servers(server, FALSE, time(0) - 300,
3282 backup_router->connection);
3284 /* Announce our clients and channels to the router */
3285 silc_server_announce_clients(server, time(0) - 300,
3286 backup_router->connection);
3287 silc_server_announce_channels(server, time(0) - 300,
3288 backup_router->connection);
3291 silc_packet_set_context(sock, NULL);
3297 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3299 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3302 if (server->router_conn == idata->sconn) {
3303 if (!server->no_reconnect)
3304 silc_server_create_connections(server);
3305 server->router_conn = NULL;
3308 silc_server_connection_free(idata->sconn);
3309 idata->sconn = NULL;
3311 silc_idlist_del_data(idata);
3313 silc_packet_set_context(sock, NULL);
3319 /* Removes client from all channels it has joined. This is used when client
3320 connection is disconnected. If the client on a channel is last, the
3321 channel is removed as well. This sends the SIGNOFF notify types. */
3323 void silc_server_remove_from_channels(SilcServer server,
3324 SilcPacketStream sock,
3325 SilcClientEntry client,
3327 const char *signoff_message,
3331 SilcChannelEntry channel;
3332 SilcChannelClientEntry chl;
3333 SilcHashTableList htl;
3334 SilcBuffer clidp = NULL;
3339 if (notify && !client->id)
3342 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3343 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3346 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3351 /* Remove the client from all channels. The client is removed from
3352 the channels' user list. */
3353 silc_hash_table_list(client->channels, &htl);
3354 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3355 channel = chl->channel;
3357 /* Remove channel if this is last client leaving the channel, unless
3358 the channel is permanent. */
3359 if (server->server_type != SILC_SERVER &&
3360 silc_hash_table_count(channel->user_list) < 2) {
3361 silc_server_channel_delete(server, channel);
3365 silc_hash_table_del(client->channels, channel);
3366 silc_hash_table_del(channel->user_list, client);
3367 channel->user_count--;
3369 /* If there is no global users on the channel anymore mark the channel
3370 as local channel. Do not check if the removed client is local client. */
3371 if (server->server_type == SILC_SERVER && channel->global_users &&
3372 chl->client->router && !silc_server_channel_has_global(channel))
3373 channel->global_users = FALSE;
3375 memset(chl, 'A', sizeof(*chl));
3378 /* Update statistics */
3379 if (SILC_IS_LOCAL(client))
3380 server->stat.my_chanclients--;
3381 if (server->server_type == SILC_ROUTER) {
3382 server->stat.cell_chanclients--;
3383 server->stat.chanclients--;
3386 /* If there is not at least one local user on the channel then we don't
3387 need the channel entry anymore, we can remove it safely, unless the
3388 channel is permanent channel */
3389 if (server->server_type == SILC_SERVER &&
3390 !silc_server_channel_has_local(channel)) {
3391 /* Notify about leaving client if this channel has global users. */
3392 if (notify && channel->global_users)
3393 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3394 SILC_NOTIFY_TYPE_SIGNOFF,
3395 signoff_message ? 2 : 1,
3396 clidp->data, silc_buffer_len(clidp),
3397 signoff_message, signoff_message ?
3398 strlen(signoff_message) : 0);
3400 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3401 silc_server_channel_delete(server, channel);
3405 /* Send notify to channel about client leaving SILC and channel too */
3407 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3408 SILC_NOTIFY_TYPE_SIGNOFF,
3409 signoff_message ? 2 : 1,
3410 clidp->data, silc_buffer_len(clidp),
3411 signoff_message, signoff_message ?
3412 strlen(signoff_message) : 0);
3414 if (killed && clidp) {
3415 /* Remove the client from channel's invite list */
3416 if (channel->invite_list &&
3417 silc_hash_table_count(channel->invite_list)) {
3419 SilcArgumentPayload iargs;
3420 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3421 silc_buffer_len(clidp), 3);
3422 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3423 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3424 silc_buffer_free(ab);
3425 silc_argument_payload_free(iargs);
3429 /* Don't create keys if we are shutting down */
3430 if (server->server_shutdown)
3433 /* Re-generate channel key if needed */
3434 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3435 if (!silc_server_create_channel_key(server, channel, 0))
3438 /* Send the channel key to the channel. The key of course is not sent
3439 to the client who was removed from the channel. */
3440 silc_server_send_channel_key(server, client->connection, channel,
3441 server->server_type == SILC_ROUTER ?
3442 FALSE : !server->standalone);
3446 silc_hash_table_list_reset(&htl);
3448 silc_buffer_free(clidp);
3451 /* Removes client from one channel. This is used for example when client
3452 calls LEAVE command to remove itself from the channel. Returns TRUE
3453 if channel still exists and FALSE if the channel is removed when
3454 last client leaves the channel. If `notify' is FALSE notify messages
3457 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3458 SilcPacketStream sock,
3459 SilcChannelEntry channel,
3460 SilcClientEntry client,
3463 SilcChannelClientEntry chl;
3466 SILC_LOG_DEBUG(("Removing %s from channel %s",
3467 silc_id_render(client->id, SILC_ID_CLIENT),
3468 channel->channel_name));
3470 /* Get the entry to the channel, if this client is not on the channel
3472 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3475 /* Remove channel if this is last client leaving the channel, unless
3476 the channel is permanent. */
3477 if (server->server_type != SILC_SERVER &&
3478 silc_hash_table_count(channel->user_list) < 2) {
3479 silc_server_channel_delete(server, channel);
3483 silc_hash_table_del(client->channels, channel);
3484 silc_hash_table_del(channel->user_list, client);
3485 channel->user_count--;
3487 /* If there is no global users on the channel anymore mark the channel
3488 as local channel. Do not check if the client is local client. */
3489 if (server->server_type == SILC_SERVER && channel->global_users &&
3490 chl->client->router && !silc_server_channel_has_global(channel))
3491 channel->global_users = FALSE;
3493 memset(chl, 'O', sizeof(*chl));
3496 /* Update statistics */
3497 if (SILC_IS_LOCAL(client))
3498 server->stat.my_chanclients--;
3499 if (server->server_type == SILC_ROUTER) {
3500 server->stat.cell_chanclients--;
3501 server->stat.chanclients--;
3504 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3508 /* If there is not at least one local user on the channel then we don't
3509 need the channel entry anymore, we can remove it safely, unless the
3510 channel is permanent channel */
3511 if (server->server_type == SILC_SERVER &&
3512 !silc_server_channel_has_local(channel)) {
3513 /* Notify about leaving client if this channel has global users. */
3514 if (notify && channel->global_users)
3515 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3516 SILC_NOTIFY_TYPE_LEAVE, 1,
3517 clidp->data, silc_buffer_len(clidp));
3519 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3520 silc_server_channel_delete(server, channel);
3521 silc_buffer_free(clidp);
3525 /* Send notify to channel about client leaving the channel */
3527 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3528 SILC_NOTIFY_TYPE_LEAVE, 1,
3529 clidp->data, silc_buffer_len(clidp));
3531 silc_buffer_free(clidp);
3535 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3536 function may be used only by router. In real SILC network all channels
3537 are created by routers thus this function is never used by normal
3540 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3541 SilcServerID *router_id,
3547 SilcChannelID *channel_id;
3548 SilcChannelEntry entry;
3549 SilcCipher send_key, receive_key;
3552 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3555 cipher = SILC_DEFAULT_CIPHER;
3557 hmac = SILC_DEFAULT_HMAC;
3559 /* Allocate cipher */
3560 if (!silc_cipher_alloc(cipher, &send_key))
3562 if (!silc_cipher_alloc(cipher, &receive_key)) {
3563 silc_cipher_free(send_key);
3568 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3569 silc_cipher_free(send_key);
3570 silc_cipher_free(receive_key);
3574 channel_name = strdup(channel_name);
3576 /* Create the channel ID */
3577 if (!silc_id_create_channel_id(server, router_id, server->rng,
3579 silc_free(channel_name);
3580 silc_cipher_free(send_key);
3581 silc_cipher_free(receive_key);
3582 silc_hmac_free(newhmac);
3586 /* Create the channel */
3587 entry = silc_idlist_add_channel(server->local_list, channel_name,
3588 SILC_CHANNEL_MODE_NONE, channel_id,
3589 NULL, send_key, receive_key, newhmac);
3591 silc_free(channel_name);
3592 silc_cipher_free(send_key);
3593 silc_cipher_free(receive_key);
3594 silc_hmac_free(newhmac);
3595 silc_free(channel_id);
3599 entry->cipher = strdup(cipher);
3600 entry->hmac_name = strdup(hmac);
3602 /* Now create the actual key material */
3603 if (!silc_server_create_channel_key(server, entry,
3604 silc_cipher_get_key_len(send_key) / 8)) {
3605 silc_idlist_del_channel(server->local_list, entry);
3609 /* Notify other routers about the new channel. We send the packet
3610 to our primary route. */
3612 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3613 channel_name, entry->id,
3614 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3617 /* Distribute to backup routers */
3618 if (broadcast && server->server_type == SILC_ROUTER) {
3620 unsigned char cid[32];
3621 SilcUInt32 name_len = strlen(channel_name);
3624 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3625 packet = silc_channel_payload_encode(channel_name, name_len,
3626 cid, id_len, entry->mode);
3627 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3628 packet->data, silc_buffer_len(packet), FALSE,
3630 silc_buffer_free(packet);
3633 server->stat.my_channels++;
3634 if (server->server_type == SILC_ROUTER) {
3635 server->stat.channels++;
3636 server->stat.cell_channels++;
3637 entry->users_resolved = TRUE;
3643 /* Same as above but creates the channel with Channel ID `channel_id. */
3646 silc_server_create_new_channel_with_id(SilcServer server,
3650 SilcChannelID *channel_id,
3653 SilcChannelEntry entry;
3654 SilcCipher send_key, receive_key;
3657 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3660 cipher = SILC_DEFAULT_CIPHER;
3662 hmac = SILC_DEFAULT_HMAC;
3664 /* Allocate cipher */
3665 if (!silc_cipher_alloc(cipher, &send_key))
3667 if (!silc_cipher_alloc(cipher, &receive_key)) {
3668 silc_cipher_free(send_key);
3673 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3674 silc_cipher_free(send_key);
3675 silc_cipher_free(receive_key);
3679 channel_name = strdup(channel_name);
3681 /* Create the channel */
3682 entry = silc_idlist_add_channel(server->local_list, channel_name,
3683 SILC_CHANNEL_MODE_NONE, channel_id,
3684 NULL, send_key, receive_key, newhmac);
3686 silc_cipher_free(send_key);
3687 silc_cipher_free(receive_key);
3688 silc_hmac_free(newhmac);
3689 silc_free(channel_name);
3693 /* Now create the actual key material */
3694 if (!silc_server_create_channel_key(server, entry,
3695 silc_cipher_get_key_len(send_key) / 8)) {
3696 silc_idlist_del_channel(server->local_list, entry);
3700 /* Notify other routers about the new channel. We send the packet
3701 to our primary route. */
3703 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3704 channel_name, entry->id,
3705 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3708 /* Distribute to backup routers */
3709 if (broadcast && server->server_type == SILC_ROUTER) {
3711 unsigned char cid[32];
3712 SilcUInt32 name_len = strlen(channel_name);
3715 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3716 packet = silc_channel_payload_encode(channel_name, name_len,
3717 cid, id_len, entry->mode);
3718 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3719 packet->data, silc_buffer_len(packet), FALSE,
3721 silc_buffer_free(packet);
3724 server->stat.my_channels++;
3725 if (server->server_type == SILC_ROUTER) {
3726 server->stat.channels++;
3727 server->stat.cell_channels++;
3728 entry->users_resolved = TRUE;
3734 /* Channel's key re-key timeout callback. */
3736 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3738 SilcServer server = app_context;
3739 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3743 /* Return now if we are shutting down */
3744 if (server->server_shutdown)
3747 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3750 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3753 /* Generates new channel key. This is used to create the initial channel key
3754 but also to re-generate new key for channel. If `key_len' is provided
3755 it is the bytes of the key length. */
3757 SilcBool silc_server_create_channel_key(SilcServer server,
3758 SilcChannelEntry channel,
3762 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3765 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3766 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3770 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3772 if (!channel->send_key)
3773 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3774 channel->send_key = NULL;
3777 if (!channel->receive_key)
3778 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3779 silc_cipher_free(channel->send_key);
3780 channel->send_key = channel->receive_key = NULL;
3786 else if (channel->key_len)
3787 len = channel->key_len / 8;
3789 len = silc_cipher_get_key_len(channel->send_key) / 8;
3791 /* Create channel key */
3792 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3795 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3796 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3798 /* Remove old key if exists */
3800 memset(channel->key, 0, channel->key_len / 8);
3801 silc_free(channel->key);
3805 channel->key_len = len * 8;
3806 channel->key = silc_memdup(channel_key, len);
3807 memset(channel_key, 0, sizeof(channel_key));
3809 /* Generate HMAC key from the channel key data and set it */
3811 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3812 memset(channel->key, 0, channel->key_len / 8);
3813 silc_free(channel->key);
3814 silc_cipher_free(channel->send_key);
3815 silc_cipher_free(channel->receive_key);
3816 channel->send_key = channel->receive_key = NULL;
3819 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3820 silc_hmac_set_key(channel->hmac, hash,
3821 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3822 memset(hash, 0, sizeof(hash));
3824 if (server->server_type == SILC_ROUTER) {
3825 if (!channel->rekey)
3826 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3827 channel->rekey->channel = channel;
3828 channel->rekey->key_len = key_len;
3829 if (channel->rekey->task)
3830 silc_schedule_task_del(server->schedule, channel->rekey->task);
3832 channel->rekey->task =
3833 silc_schedule_task_add_timeout(server->schedule,
3834 silc_server_channel_key_rekey,
3835 (void *)channel->rekey,
3836 server->config->channel_rekey_secs, 0);
3842 /* Saves the channel key found in the encoded `key_payload' buffer. This
3843 function is used when we receive Channel Key Payload and also when we're
3844 processing JOIN command reply. Returns entry to the channel. */
3846 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3847 SilcBuffer key_payload,
3848 SilcChannelEntry channel)
3850 SilcChannelKeyPayload payload = NULL;
3852 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3856 /* Decode channel key payload */
3857 payload = silc_channel_key_payload_parse(key_payload->data,
3858 silc_buffer_len(key_payload));
3860 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3865 /* Get the channel entry */
3868 /* Get channel ID */
3869 tmp = silc_channel_key_get_id(payload, &tmp_len);
3870 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3875 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3877 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3879 if (server->server_type == SILC_ROUTER)
3880 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3881 silc_id_render(&id, SILC_ID_CHANNEL)));
3887 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3889 tmp = silc_channel_key_get_key(payload, &tmp_len);
3895 cipher = silc_channel_key_get_cipher(payload, NULL);
3901 /* Remove old key if exists */
3903 memset(channel->key, 0, channel->key_len / 8);
3904 silc_free(channel->key);
3905 silc_cipher_free(channel->send_key);
3906 silc_cipher_free(channel->receive_key);
3909 /* Create new cipher */
3910 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3911 channel->send_key = NULL;
3915 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3916 silc_cipher_free(channel->send_key);
3917 channel->send_key = channel->receive_key = NULL;
3922 if (channel->cipher)
3923 silc_free(channel->cipher);
3924 channel->cipher = strdup(cipher);
3927 channel->key_len = tmp_len * 8;
3928 channel->key = silc_memdup(tmp, tmp_len);
3929 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3930 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3932 /* Generate HMAC key from the channel key data and set it */
3934 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3935 memset(channel->key, 0, channel->key_len / 8);
3936 silc_free(channel->key);
3937 silc_cipher_free(channel->send_key);
3938 silc_cipher_free(channel->receive_key);
3939 channel->send_key = channel->receive_key = NULL;
3942 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3943 silc_hmac_set_key(channel->hmac, hash,
3944 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3946 memset(hash, 0, sizeof(hash));
3947 memset(tmp, 0, tmp_len);
3949 if (server->server_type == SILC_ROUTER) {
3950 if (!channel->rekey)
3951 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3952 channel->rekey->channel = channel;
3953 if (channel->rekey->task)
3954 silc_schedule_task_del(server->schedule, channel->rekey->task);
3956 channel->rekey->task =
3957 silc_schedule_task_add_timeout(server->schedule,
3958 silc_server_channel_key_rekey,
3959 (void *)channel->rekey,
3960 server->config->channel_rekey_secs, 0);
3965 silc_channel_key_payload_free(payload);
3970 /* Returns assembled of all servers in the given ID list. The packet's
3971 form is dictated by the New ID payload. */
3973 static void silc_server_announce_get_servers(SilcServer server,
3974 SilcServerEntry remote,
3976 SilcBuffer *servers,
3977 unsigned long creation_time)
3980 SilcIDCacheEntry id_cache;
3981 SilcServerEntry entry;
3985 /* Go through all clients in the list */
3986 if (silc_idcache_get_all(id_list->servers, &list)) {
3987 silc_list_start(list);
3988 while ((id_cache = silc_list_get(list))) {
3989 entry = (SilcServerEntry)id_cache->context;
3991 /* Do not announce the one we've sending our announcements and
3992 do not announce ourself. Also check the creation time if it's
3994 if ((entry == remote) || (entry == server->id_entry) ||
3995 (creation_time && entry->data.created < creation_time))
3998 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
4000 tmp = silc_buffer_realloc(*servers,
4002 silc_buffer_truelen((*servers)) +
4003 silc_buffer_len(idp) :
4004 silc_buffer_len(idp)));
4008 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4009 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4010 silc_buffer_pull(*servers, silc_buffer_len(idp));
4011 silc_buffer_free(idp);
4017 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4023 p = silc_notify_payload_encode(notify, argc, ap);
4029 /* This function is used by router to announce existing servers to our
4030 primary router when we've connected to it. If `creation_time' is non-zero
4031 then only the servers that has been created after the `creation_time'
4032 will be announced. */
4034 void silc_server_announce_servers(SilcServer server, SilcBool global,
4035 unsigned long creation_time,
4036 SilcPacketStream remote)
4038 SilcBuffer servers = NULL;
4040 SILC_LOG_DEBUG(("Announcing servers"));
4042 /* Get servers in local list */
4043 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4044 server->local_list, &servers,
4048 /* Get servers in global list */
4049 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4050 server->global_list, &servers,
4054 silc_buffer_push(servers, servers->data - servers->head);
4055 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4057 /* Send the packet */
4058 silc_server_packet_send(server, remote,
4059 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4060 servers->data, silc_buffer_len(servers));
4062 silc_buffer_free(servers);
4066 /* Returns assembled packet of all clients in the given ID list. The
4067 packet's form is dictated by the New ID Payload. */
4069 static void silc_server_announce_get_clients(SilcServer server,
4071 SilcBuffer *clients,
4073 unsigned long creation_time)
4076 SilcIDCacheEntry id_cache;
4077 SilcClientEntry client;
4080 unsigned char mode[4];
4083 /* Go through all clients in the list */
4084 if (silc_idcache_get_all(id_list->clients, &list)) {
4085 silc_list_start(list);
4086 while ((id_cache = silc_list_get(list))) {
4087 client = (SilcClientEntry)id_cache->context;
4089 if (creation_time && client->data.created < creation_time)
4091 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4093 if (!client->connection && !client->router)
4096 SILC_LOG_DEBUG(("Announce Client ID %s",
4097 silc_id_render(client->id, SILC_ID_CLIENT)));
4099 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4103 tmp2 = silc_buffer_realloc(*clients,
4105 silc_buffer_truelen((*clients)) +
4106 silc_buffer_len(idp) :
4107 silc_buffer_len(idp)));
4111 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4112 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4113 silc_buffer_pull(*clients, silc_buffer_len(idp));
4115 SILC_PUT32_MSB(client->mode, mode);
4117 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4118 2, idp->data, silc_buffer_len(idp),
4120 tmp2 = silc_buffer_realloc(*umodes,
4122 silc_buffer_truelen((*umodes)) +
4123 silc_buffer_len(tmp) :
4124 silc_buffer_len(tmp)));
4128 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4129 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4130 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4131 silc_buffer_free(tmp);
4133 silc_buffer_free(idp);
4138 /* This function is used to announce our existing clients to our router
4139 when we've connected to it. If `creation_time' is non-zero then only
4140 the clients that has been created after the `creation_time' will be
4143 void silc_server_announce_clients(SilcServer server,
4144 unsigned long creation_time,
4145 SilcPacketStream remote)
4147 SilcBuffer clients = NULL;
4148 SilcBuffer umodes = NULL;
4150 SILC_LOG_DEBUG(("Announcing clients"));
4152 /* Get clients in local list */
4153 silc_server_announce_get_clients(server, server->local_list,
4154 &clients, &umodes, creation_time);
4156 /* As router we announce our global list as well */
4157 if (server->server_type == SILC_ROUTER)
4158 silc_server_announce_get_clients(server, server->global_list,
4159 &clients, &umodes, creation_time);
4162 silc_buffer_push(clients, clients->data - clients->head);
4163 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4165 /* Send the packet */
4166 silc_server_packet_send(server, remote,
4167 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4168 clients->data, silc_buffer_len(clients));
4170 silc_buffer_free(clients);
4174 silc_buffer_push(umodes, umodes->data - umodes->head);
4175 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4177 /* Send the packet */
4178 silc_server_packet_send(server, remote,
4179 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4180 umodes->data, silc_buffer_len(umodes));
4182 silc_buffer_free(umodes);
4186 /* Returns channel's topic for announcing it */
4188 void silc_server_announce_get_channel_topic(SilcServer server,
4189 SilcChannelEntry channel,
4194 if (channel->topic) {
4195 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4196 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4198 silc_buffer_len(chidp),
4200 strlen(channel->topic));
4201 silc_buffer_free(chidp);
4205 /* Returns channel's invite and ban lists */
4207 void silc_server_announce_get_inviteban(SilcServer server,
4208 SilcChannelEntry channel,
4212 SilcBuffer list, idp, idp2, tmp2;
4215 SilcHashTableList htl;
4216 const unsigned char a[1] = { 0x03 };
4218 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4220 /* Encode invite list */
4221 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4222 list = silc_buffer_alloc_size(2);
4223 type = silc_hash_table_count(channel->invite_list);
4224 SILC_PUT16_MSB(type, list->data);
4225 silc_hash_table_list(channel->invite_list, &htl);
4226 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4227 list = silc_argument_payload_encode_one(list, tmp2->data,
4228 silc_buffer_len(tmp2),
4229 SILC_PTR_TO_32(ptype));
4230 silc_hash_table_list_reset(&htl);
4232 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4234 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4235 idp->data, silc_buffer_len(idp),
4236 channel->channel_name,
4237 strlen(channel->channel_name),
4238 idp2->data, silc_buffer_len(idp2),
4240 list->data, silc_buffer_len(list));
4241 silc_buffer_free(idp2);
4242 silc_buffer_free(list);
4245 /* Encode ban list */
4246 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4247 list = silc_buffer_alloc_size(2);
4248 type = silc_hash_table_count(channel->ban_list);
4249 SILC_PUT16_MSB(type, list->data);
4250 silc_hash_table_list(channel->ban_list, &htl);
4251 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4252 list = silc_argument_payload_encode_one(list, tmp2->data,
4253 silc_buffer_len(tmp2),
4254 SILC_PTR_TO_32(ptype));
4255 silc_hash_table_list_reset(&htl);
4258 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4259 idp->data, silc_buffer_len(idp),
4261 list->data, silc_buffer_len(list));
4262 silc_buffer_free(list);
4265 silc_buffer_free(idp);
4268 /* Returns assembled packets for channel users of the `channel'. */
4270 void silc_server_announce_get_channel_users(SilcServer server,
4271 SilcChannelEntry channel,
4272 SilcBuffer *channel_modes,
4273 SilcBuffer *channel_users,
4274 SilcBuffer *channel_users_modes)
4276 SilcChannelClientEntry chl;
4277 SilcHashTableList htl;
4278 SilcBuffer chidp, clidp, csidp;
4279 SilcBuffer tmp, fkey = NULL, chpklist;
4281 unsigned char mode[4], ulimit[4];
4285 SILC_LOG_DEBUG(("Start"));
4287 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4288 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4289 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4292 SILC_PUT32_MSB(channel->mode, mode);
4293 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4294 SILC_PUT32_MSB(channel->user_limit, ulimit);
4295 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4296 if (channel->founder_key)
4297 fkey = silc_public_key_payload_encode(channel->founder_key);
4299 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4301 silc_buffer_len(csidp),
4304 hmac, hmac ? strlen(hmac) : 0,
4305 channel->passphrase,
4306 channel->passphrase ?
4307 strlen(channel->passphrase) : 0,
4308 fkey ? fkey->data : NULL,
4309 fkey ? silc_buffer_len(fkey) : 0,
4310 chpklist ? chpklist->data : NULL,
4312 silc_buffer_len(chpklist) : 0,
4314 SILC_CHANNEL_MODE_ULIMIT ?
4317 SILC_CHANNEL_MODE_ULIMIT ?
4318 sizeof(ulimit) : 0));
4319 len = silc_buffer_len(tmp);
4321 silc_buffer_realloc(*channel_modes,
4323 silc_buffer_truelen((*channel_modes)) + len : len));
4326 *channel_modes = tmp2;
4327 silc_buffer_pull_tail(*channel_modes,
4328 ((*channel_modes)->end -
4329 (*channel_modes)->data));
4330 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4331 silc_buffer_pull(*channel_modes, len);
4332 silc_buffer_free(tmp);
4333 silc_buffer_free(fkey);
4336 /* Now find all users on the channel */
4337 silc_hash_table_list(channel->user_list, &htl);
4338 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4339 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4341 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4345 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4347 silc_buffer_len(clidp),
4349 silc_buffer_len(chidp));
4350 len = silc_buffer_len(tmp);
4352 silc_buffer_realloc(*channel_users,
4354 silc_buffer_truelen((*channel_users)) + len : len));
4357 *channel_users = tmp2;
4358 silc_buffer_pull_tail(*channel_users,
4359 ((*channel_users)->end -
4360 (*channel_users)->data));
4362 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4363 silc_buffer_pull(*channel_users, len);
4364 silc_buffer_free(tmp);
4366 /* CUMODE notify for mode change on the channel */
4367 SILC_PUT32_MSB(chl->mode, mode);
4368 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4369 fkey = silc_public_key_payload_encode(channel->founder_key);
4370 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4372 silc_buffer_len(csidp),
4375 silc_buffer_len(clidp),
4376 fkey ? fkey->data : NULL,
4377 fkey ? silc_buffer_len(fkey) : 0);
4378 len = silc_buffer_len(tmp);
4380 silc_buffer_realloc(*channel_users_modes,
4381 (*channel_users_modes ?
4382 silc_buffer_truelen((*channel_users_modes)) +
4386 *channel_users_modes = tmp2;
4387 silc_buffer_pull_tail(*channel_users_modes,
4388 ((*channel_users_modes)->end -
4389 (*channel_users_modes)->data));
4391 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4392 silc_buffer_pull(*channel_users_modes, len);
4393 silc_buffer_free(tmp);
4394 silc_buffer_free(fkey);
4396 silc_buffer_free(clidp);
4398 silc_hash_table_list_reset(&htl);
4399 silc_buffer_free(chidp);
4400 silc_buffer_free(csidp);
4403 /* Returns assembled packets for all channels and users on those channels
4404 from the given ID List. The packets are in the form dictated by the
4405 New Channel and New Channel User payloads. */
4407 void silc_server_announce_get_channels(SilcServer server,
4409 SilcBuffer *channels,
4410 SilcBuffer **channel_modes,
4411 SilcBuffer *channel_users,
4412 SilcBuffer **channel_users_modes,
4413 SilcUInt32 *channel_users_modes_c,
4414 SilcBuffer **channel_topics,
4415 SilcBuffer **channel_invites,
4416 SilcBuffer **channel_bans,
4417 SilcChannelID ***channel_ids,
4418 unsigned long creation_time)
4421 SilcIDCacheEntry id_cache;
4422 SilcChannelEntry channel;
4423 unsigned char cid[32];
4425 SilcUInt16 name_len;
4427 int i = *channel_users_modes_c;
4431 SILC_LOG_DEBUG(("Start"));
4433 /* Go through all channels in the list */
4434 if (silc_idcache_get_all(id_list->channels, &list)) {
4435 silc_list_start(list);
4436 while ((id_cache = silc_list_get(list))) {
4437 channel = (SilcChannelEntry)id_cache->context;
4439 if (creation_time && channel->created < creation_time)
4444 SILC_LOG_DEBUG(("Announce Channel ID %s",
4445 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4447 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4448 name_len = strlen(channel->channel_name);
4451 len = 4 + name_len + id_len + 4;
4453 silc_buffer_realloc(*channels,
4455 silc_buffer_truelen((*channels)) +
4461 silc_buffer_pull_tail(*channels,
4462 ((*channels)->end - (*channels)->data));
4463 silc_buffer_format(*channels,
4464 SILC_STR_UI_SHORT(name_len),
4465 SILC_STR_UI_XNSTRING(channel->channel_name,
4467 SILC_STR_UI_SHORT(id_len),
4468 SILC_STR_UI_XNSTRING(cid, id_len),
4469 SILC_STR_UI_INT(channel->mode),
4471 silc_buffer_pull(*channels, len);
4474 if (creation_time && channel->updated < creation_time)
4480 /* Channel user modes */
4481 tmp = silc_realloc(*channel_users_modes,
4482 sizeof(**channel_users_modes) * (i + 1));
4485 *channel_users_modes = tmp;
4486 (*channel_users_modes)[i] = NULL;
4487 tmp = silc_realloc(*channel_modes,
4488 sizeof(**channel_modes) * (i + 1));
4491 *channel_modes = tmp;
4492 (*channel_modes)[i] = NULL;
4493 tmp = silc_realloc(*channel_ids,
4494 sizeof(**channel_ids) * (i + 1));
4498 (*channel_ids)[i] = NULL;
4499 silc_server_announce_get_channel_users(server, channel,
4500 &(*channel_modes)[i],
4502 &(*channel_users_modes)[i]);
4503 (*channel_ids)[i] = channel->id;
4505 /* Channel's topic */
4506 tmp = silc_realloc(*channel_topics,
4507 sizeof(**channel_topics) * (i + 1));
4510 *channel_topics = tmp;
4511 (*channel_topics)[i] = NULL;
4512 silc_server_announce_get_channel_topic(server, channel,
4513 &(*channel_topics)[i]);
4515 /* Channel's invite and ban list */
4516 tmp = silc_realloc(*channel_invites,
4517 sizeof(**channel_invites) * (i + 1));
4520 *channel_invites = tmp;
4521 (*channel_invites)[i] = NULL;
4522 tmp = silc_realloc(*channel_bans,
4523 sizeof(**channel_bans) * (i + 1));
4526 *channel_bans = tmp;
4527 (*channel_bans)[i] = NULL;
4528 silc_server_announce_get_inviteban(server, channel,
4529 &(*channel_invites)[i],
4530 &(*channel_bans)[i]);
4532 (*channel_users_modes_c)++;
4540 /* This function is used to announce our existing channels to our router
4541 when we've connected to it. This also announces the users on the
4542 channels to the router. If the `creation_time' is non-zero only the
4543 channels that was created after the `creation_time' are announced.
4544 Note that the channel users are still announced even if the `creation_time'
4547 void silc_server_announce_channels(SilcServer server,
4548 unsigned long creation_time,
4549 SilcPacketStream remote)
4551 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4552 SilcBuffer *channel_users_modes = NULL;
4553 SilcBuffer *channel_topics = NULL;
4554 SilcBuffer *channel_invites = NULL;
4555 SilcBuffer *channel_bans = NULL;
4556 SilcUInt32 channel_users_modes_c = 0;
4557 SilcChannelID **channel_ids = NULL;
4559 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4561 /* Get channels and channel users in local list */
4562 silc_server_announce_get_channels(server, server->local_list,
4563 &channels, &channel_modes,
4565 &channel_users_modes,
4566 &channel_users_modes_c,
4570 &channel_ids, creation_time);
4572 /* Get channels and channel users in global list */
4573 if (server->server_type != SILC_SERVER)
4574 silc_server_announce_get_channels(server, server->global_list,
4575 &channels, &channel_modes,
4577 &channel_users_modes,
4578 &channel_users_modes_c,
4582 &channel_ids, creation_time);
4585 silc_buffer_push(channels, channels->data - channels->head);
4586 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4588 /* Send the packet */
4589 silc_server_packet_send(server, remote,
4590 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4591 channels->data, silc_buffer_len(channels));
4593 silc_buffer_free(channels);
4596 if (channel_users) {
4597 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4598 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4599 silc_buffer_len(channel_users));
4601 /* Send the packet */
4602 silc_server_packet_send(server, remote,
4603 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4604 channel_users->data, silc_buffer_len(channel_users));
4606 silc_buffer_free(channel_users);
4609 if (channel_modes) {
4612 for (i = 0; i < channel_users_modes_c; i++) {
4613 if (!channel_modes[i])
4615 silc_buffer_push(channel_modes[i],
4616 channel_modes[i]->data -
4617 channel_modes[i]->head);
4618 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4619 silc_buffer_len(channel_modes[i]));
4620 silc_server_packet_send_dest(server, remote,
4621 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4622 channel_ids[i], SILC_ID_CHANNEL,
4623 channel_modes[i]->data,
4624 silc_buffer_len(channel_modes[i]));
4625 silc_buffer_free(channel_modes[i]);
4627 silc_free(channel_modes);
4630 if (channel_users_modes) {
4633 for (i = 0; i < channel_users_modes_c; i++) {
4634 if (!channel_users_modes[i])
4636 silc_buffer_push(channel_users_modes[i],
4637 channel_users_modes[i]->data -
4638 channel_users_modes[i]->head);
4639 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4640 silc_buffer_len(channel_users_modes[i]));
4641 silc_server_packet_send_dest(server, remote,
4642 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4643 channel_ids[i], SILC_ID_CHANNEL,
4644 channel_users_modes[i]->data,
4645 silc_buffer_len(channel_users_modes[i]));
4646 silc_buffer_free(channel_users_modes[i]);
4648 silc_free(channel_users_modes);
4651 if (channel_topics) {
4654 for (i = 0; i < channel_users_modes_c; i++) {
4655 if (!channel_topics[i])
4658 silc_buffer_push(channel_topics[i],
4659 channel_topics[i]->data -
4660 channel_topics[i]->head);
4661 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4662 silc_buffer_len(channel_topics[i]));
4663 silc_server_packet_send_dest(server, remote,
4664 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4665 channel_ids[i], SILC_ID_CHANNEL,
4666 channel_topics[i]->data,
4667 silc_buffer_len(channel_topics[i]));
4668 silc_buffer_free(channel_topics[i]);
4670 silc_free(channel_topics);
4673 if (channel_invites) {
4676 for (i = 0; i < channel_users_modes_c; i++) {
4677 if (!channel_invites[i])
4680 silc_buffer_push(channel_invites[i],
4681 channel_invites[i]->data -
4682 channel_invites[i]->head);
4683 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4684 silc_buffer_len(channel_invites[i]));
4685 silc_server_packet_send_dest(server, remote,
4686 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4687 channel_ids[i], SILC_ID_CHANNEL,
4688 channel_invites[i]->data,
4689 silc_buffer_len(channel_invites[i]));
4690 silc_buffer_free(channel_invites[i]);
4692 silc_free(channel_invites);
4698 for (i = 0; i < channel_users_modes_c; i++) {
4699 if (!channel_bans[i])
4702 silc_buffer_push(channel_bans[i],
4703 channel_bans[i]->data -
4704 channel_bans[i]->head);
4705 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4706 silc_buffer_len(channel_bans[i]));
4707 silc_server_packet_send_dest(server, remote,
4708 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4709 channel_ids[i], SILC_ID_CHANNEL,
4710 channel_bans[i]->data,
4711 silc_buffer_len(channel_bans[i]));
4712 silc_buffer_free(channel_bans[i]);
4714 silc_free(channel_bans);
4717 silc_free(channel_ids);
4720 /* Announces WATCH list. */
4722 void silc_server_announce_watches(SilcServer server,
4723 SilcPacketStream remote)
4725 SilcHashTableList htl;
4726 SilcBuffer buffer, idp, args, pkp;
4727 SilcClientEntry client;
4730 SILC_LOG_DEBUG(("Announcing watch list"));
4732 /* XXX because way we save the nicks (hash) we cannot announce them. */
4734 /* XXX we should send all public keys in one command if client is
4735 watching more than one key */
4736 silc_hash_table_list(server->watcher_list_pk, &htl);
4737 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4738 if (!client || !client->id)
4741 server->stat.commands_sent++;
4743 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4744 args = silc_buffer_alloc_size(2);
4745 silc_buffer_format(args,
4746 SILC_STR_UI_SHORT(1),
4748 pkp = silc_public_key_payload_encode(key);
4749 args = silc_argument_payload_encode_one(args, pkp->data,
4750 silc_buffer_len(pkp), 0x00);
4751 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4752 ++server->cmd_ident, 2,
4753 1, idp->data, silc_buffer_len(idp),
4755 silc_buffer_len(args));
4758 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4759 buffer->data, silc_buffer_len(buffer));
4761 silc_buffer_free(pkp);
4762 silc_buffer_free(args);
4763 silc_buffer_free(idp);
4764 silc_buffer_free(buffer);
4766 silc_hash_table_list_reset(&htl);
4769 /* Assembles user list and users mode list from the `channel'. */
4771 SilcBool silc_server_get_users_on_channel(SilcServer server,
4772 SilcChannelEntry channel,
4773 SilcBuffer *user_list,
4774 SilcBuffer *mode_list,
4775 SilcUInt32 *user_count)
4777 SilcChannelClientEntry chl;
4778 SilcHashTableList htl;
4779 SilcBuffer client_id_list;
4780 SilcBuffer client_mode_list;
4782 SilcUInt32 list_count = 0, len = 0;
4784 if (!silc_hash_table_count(channel->user_list))
4787 silc_hash_table_list(channel->user_list, &htl);
4788 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4789 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4790 silc_hash_table_list_reset(&htl);
4792 client_id_list = silc_buffer_alloc(len);
4794 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4795 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4796 silc_buffer_pull_tail(client_mode_list,
4797 silc_buffer_truelen(client_mode_list));
4799 silc_hash_table_list(channel->user_list, &htl);
4800 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4802 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4803 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4804 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4805 silc_buffer_free(idp);
4807 /* Client's mode on channel */
4808 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4809 silc_buffer_pull(client_mode_list, 4);
4813 silc_hash_table_list_reset(&htl);
4814 silc_buffer_push(client_id_list,
4815 client_id_list->data - client_id_list->head);
4816 silc_buffer_push(client_mode_list,
4817 client_mode_list->data - client_mode_list->head);
4819 *user_list = client_id_list;
4820 *mode_list = client_mode_list;
4821 *user_count = list_count;
4825 /* Saves users and their modes to the `channel'. */
4827 void silc_server_save_users_on_channel(SilcServer server,
4828 SilcPacketStream sock,
4829 SilcChannelEntry channel,
4830 SilcClientID *noadd,
4831 SilcBuffer user_list,
4832 SilcBuffer mode_list,
4833 SilcUInt32 user_count)
4839 SilcClientEntry client;
4840 SilcIDCacheEntry cache;
4841 SilcChannelClientEntry chl;
4843 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4844 channel->channel_name));
4846 for (i = 0; i < user_count; i++) {
4848 SILC_GET16_MSB(idp_len, user_list->data + 2);
4850 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4852 silc_buffer_pull(user_list, idp_len);
4855 SILC_GET32_MSB(mode, mode_list->data);
4856 silc_buffer_pull(mode_list, 4);
4858 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4863 /* Check if we have this client cached already. */
4864 client = silc_idlist_find_client_by_id(server->local_list,
4866 server->server_type, &cache);
4868 client = silc_idlist_find_client_by_id(server->global_list,
4870 server->server_type, &cache);
4872 /* If router did not find such Client ID in its lists then this must
4873 be bogus client or some router in the net is buggy. */
4874 if (server->server_type != SILC_SERVER)
4877 /* We don't have that client anywhere, add it. The client is added
4878 to global list since server didn't have it in the lists so it must be
4880 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4881 silc_id_dup(&id.u.client_id,
4883 silc_packet_get_context(sock),
4886 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4890 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4893 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4894 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4895 "%s", channel->channel_name));
4899 if (!silc_server_client_on_channel(client, channel, &chl)) {
4900 /* Client was not on the channel, add it. */
4901 chl = silc_calloc(1, sizeof(*chl));
4902 chl->client = client;
4904 chl->channel = channel;
4905 silc_hash_table_add(channel->user_list, chl->client, chl);
4906 silc_hash_table_add(client->channels, chl->channel, chl);
4907 channel->user_count++;
4915 /* Saves channels and channels user modes to the `client'. Removes
4916 the client from those channels that are not sent in the list but
4919 void silc_server_save_user_channels(SilcServer server,
4920 SilcPacketStream sock,
4921 SilcClientEntry client,
4922 SilcBuffer channels,
4923 SilcBuffer channels_user_modes)
4926 SilcUInt32 *chumodes;
4927 SilcChannelPayload entry;
4928 SilcChannelEntry channel;
4929 SilcChannelID channel_id;
4930 SilcChannelClientEntry chl;
4931 SilcHashTable ht = NULL;
4932 SilcHashTableList htl;
4936 if (!channels || !channels_user_modes ||
4937 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4940 ch = silc_channel_payload_parse_list(channels->data,
4941 silc_buffer_len(channels));
4942 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4944 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4945 NULL, NULL, NULL, TRUE);
4946 silc_dlist_start(ch);
4947 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4948 /* Check if we have this channel, and add it if we don't have it.
4949 Also add the client on the channel unless it is there already. */
4950 if (!silc_channel_get_id_parse(entry, &channel_id))
4952 channel = silc_idlist_find_channel_by_id(server->local_list,
4955 channel = silc_idlist_find_channel_by_id(server->global_list,
4958 if (server->server_type != SILC_SERVER) {
4963 /* We don't have that channel anywhere, add it. */
4964 name = silc_channel_get_name(entry, NULL);
4965 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4966 silc_id_dup(&channel_id,
4968 server->router, NULL, NULL, 0);
4975 channel->mode = silc_channel_get_mode(entry);
4977 /* Add the client on the channel */
4978 if (!silc_server_client_on_channel(client, channel, &chl)) {
4979 chl = silc_calloc(1, sizeof(*chl));
4980 chl->client = client;
4981 chl->mode = chumodes[i++];
4982 chl->channel = channel;
4983 silc_hash_table_add(channel->user_list, chl->client, chl);
4984 silc_hash_table_add(client->channels, chl->channel, chl);
4985 channel->user_count++;
4988 chl->mode = chumodes[i++];
4991 silc_hash_table_add(ht, channel, channel);
4993 silc_channel_payload_list_free(ch);
4994 silc_free(chumodes);
4998 /* Go through the list again and remove client from channels that
4999 are no part of the list. */
5001 silc_hash_table_list(client->channels, &htl);
5002 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5003 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5004 silc_hash_table_del(chl->channel->user_list, chl->client);
5005 silc_hash_table_del(chl->client->channels, chl->channel);
5009 silc_hash_table_list_reset(&htl);
5010 silc_hash_table_free(ht);
5012 silc_hash_table_list(client->channels, &htl);
5013 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5014 silc_hash_table_del(chl->channel->user_list, chl->client);
5015 silc_hash_table_del(chl->client->channels, chl->channel);
5018 silc_hash_table_list_reset(&htl);
5022 /* Lookups route to the client indicated by the `id_data'. The connection
5023 object and internal data object is returned. Returns NULL if route
5024 could not be found to the client. If the `client_id' is specified then
5025 it is used and the `id_data' is ignored. */
5028 silc_server_get_client_route(SilcServer server,
5029 unsigned char *id_data,
5031 SilcClientID *client_id,
5032 SilcIDListData *idata,
5033 SilcClientEntry *client_entry)
5035 SilcClientID *id, clid;
5036 SilcClientEntry client;
5038 SILC_LOG_DEBUG(("Start"));
5041 *client_entry = NULL;
5043 /* Decode destination Client ID */
5045 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5047 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5049 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5052 /* If the destination belongs to our server we don't have to route
5053 the packet anywhere but to send it to the local destination. */
5054 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5058 /* If we are router and the client has router then the client is in
5059 our cell but not directly connected to us. */
5060 if (server->server_type == SILC_ROUTER && client->router) {
5061 /* We are of course in this case the client's router thus the route
5062 to the client is the server who owns the client. So, we will send
5063 the packet to that server. */
5065 *idata = (SilcIDListData)client->router;
5066 return client->router->connection;
5069 /* Seems that client really is directly connected to us */
5071 *idata = (SilcIDListData)client;
5073 *client_entry = client;
5074 return client->connection;
5077 /* Destination belongs to someone not in this server. If we are normal
5078 server our action is to send the packet to our router. */
5079 if (server->server_type != SILC_ROUTER && !server->standalone) {
5082 *idata = (SilcIDListData)server->router;
5083 return SILC_PRIMARY_ROUTE(server);
5086 /* We are router and we will perform route lookup for the destination
5087 and send the packet to fastest route. */
5088 if (server->server_type == SILC_ROUTER && !server->standalone) {
5089 /* Check first that the ID is valid */
5090 client = silc_idlist_find_client_by_id(server->global_list, id,
5093 SilcPacketStream dst_sock;
5095 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5098 if (idata && dst_sock)
5099 *idata = silc_packet_get_context(dst_sock);
5108 /* Encodes and returns channel list of channels the `client' has joined.
5109 Secret channels are not put to the list. */
5111 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5112 SilcClientEntry client,
5113 SilcBool get_private,
5114 SilcBool get_secret,
5115 SilcBuffer *user_mode_list)
5117 SilcBuffer buffer = NULL;
5118 SilcChannelEntry channel;
5119 SilcChannelClientEntry chl;
5120 SilcHashTableList htl;
5121 unsigned char cid[32];
5123 SilcUInt16 name_len;
5127 *user_mode_list = NULL;
5129 silc_hash_table_list(client->channels, &htl);
5130 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5131 channel = chl->channel;
5133 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5135 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5138 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5139 name_len = strlen(channel->channel_name);
5141 len = 4 + name_len + id_len + 4;
5142 buffer = silc_buffer_realloc(buffer,
5144 silc_buffer_truelen(buffer) + len : len));
5145 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5146 silc_buffer_format(buffer,
5147 SILC_STR_UI_SHORT(name_len),
5148 SILC_STR_DATA(channel->channel_name, name_len),
5149 SILC_STR_UI_SHORT(id_len),
5150 SILC_STR_DATA(cid, id_len),
5151 SILC_STR_UI_INT(chl->channel->mode),
5153 silc_buffer_pull(buffer, len);
5155 if (user_mode_list) {
5157 silc_buffer_realloc(*user_mode_list,
5159 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5160 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5161 (*user_mode_list)->data));
5162 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5163 silc_buffer_pull(*user_mode_list, 4);
5166 silc_hash_table_list_reset(&htl);
5169 silc_buffer_push(buffer, buffer->data - buffer->head);
5170 if (user_mode_list && *user_mode_list)
5171 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5172 (*user_mode_list)->head));
5177 /* Task callback used to retrieve network statistical information from
5178 router server once in a while. */
5180 SILC_TASK_CALLBACK(silc_server_get_stats)
5182 SilcServer server = (SilcServer)context;
5183 SilcBuffer idp, packet;
5185 if (!server->standalone) {
5186 SILC_LOG_DEBUG(("Retrieving stats from router"));
5187 server->stat.commands_sent++;
5188 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5190 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5191 ++server->cmd_ident, 1,
5193 silc_buffer_len(idp));
5194 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5195 SILC_PACKET_COMMAND, 0, packet->data,
5196 silc_buffer_len(packet));
5197 silc_buffer_free(packet);
5198 silc_buffer_free(idp);
5202 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,