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);
1511 /* We already have primary router. Disconnect this connection */
1512 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1513 silc_idlist_del_server(server->global_list, id_entry);
1514 if (sconn->callback)
1515 (*sconn->callback)(server, NULL, sconn->callback_context);
1516 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1517 silc_server_disconnect_remote(server, sconn->sock,
1518 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1523 /* Add this server to be our backup router */
1524 id_entry->server_type = SILC_BACKUP_ROUTER;
1525 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1526 sconn->backup_replace_port, FALSE);
1532 if (sconn->callback)
1533 (*sconn->callback)(server, NULL, sconn->callback_context);
1534 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1535 silc_server_disconnect_remote(server, sconn->sock,
1536 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1540 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1542 conn = sconn->conn.ref_ptr;
1543 param = &server->config->param;
1544 if (conn && conn->param)
1545 param = conn->param;
1547 /* Register rekey timeout */
1548 sconn->rekey_timeout = param->key_exchange_rekey;
1549 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1550 sconn->sock, sconn->rekey_timeout, 0);
1552 /* Set the entry as packet stream context */
1553 silc_packet_set_context(sconn->sock, id_entry);
1555 /* Call the completion callback to indicate that we've connected to
1557 if (sconn && sconn->callback)
1558 (*sconn->callback)(server, id_entry, sconn->callback_context);
1560 if (sconn == server->router_conn)
1561 server->router_conn = NULL;
1566 /* SKE completion callback */
1568 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1569 SilcSKESecurityProperties prop,
1570 SilcSKEKeyMaterial keymat,
1571 SilcSKERekeyMaterial rekey,
1574 SilcPacketStream sock = context;
1575 SilcUnknownEntry entry = silc_packet_get_context(sock);
1576 SilcServerConnection sconn = entry->data.sconn;
1577 SilcServer server = entry->server;
1578 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1579 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1580 void *auth_data = NULL;
1581 SilcUInt32 auth_data_len = 0;
1582 SilcConnAuth connauth;
1583 SilcCipher send_key, receive_key;
1584 SilcHmac hmac_send, hmac_receive;
1587 SILC_LOG_DEBUG(("Connection %p, SKE completed, entry %p", sconn, entry));
1591 if (status != SILC_SKE_STATUS_OK) {
1593 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1594 silc_ske_map_status(status), entry->hostname, entry->ip));
1596 /* XXX retry connecting */
1598 if (sconn->callback)
1599 (*sconn->callback)(server, NULL, sconn->callback_context);
1600 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1601 silc_server_disconnect_remote(server, sconn->sock,
1602 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1606 SILC_LOG_DEBUG(("Setting keys into use"));
1608 /* Set the keys into use. The data will be encrypted after this. */
1609 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1610 &hmac_send, &hmac_receive, &hash)) {
1612 /* XXX retry connecting */
1614 /* Error setting keys */
1616 if (sconn->callback)
1617 (*sconn->callback)(server, NULL, sconn->callback_context);
1618 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1619 silc_server_disconnect_remote(server, sconn->sock,
1620 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1623 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1624 hmac_receive, FALSE);
1626 SILC_LOG_DEBUG(("Starting connection authentication"));
1628 connauth = silc_connauth_alloc(server->schedule, ske,
1629 server->config->conn_auth_timeout);
1631 /* XXX retry connecting */
1633 /** Error allocating auth protocol */
1635 if (sconn->callback)
1636 (*sconn->callback)(server, NULL, sconn->callback_context);
1637 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1638 silc_server_disconnect_remote(server, sconn->sock,
1639 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1643 /* Get authentication method */
1645 if (conn->passphrase) {
1646 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1647 auth_meth = SILC_AUTH_PUBLIC_KEY;
1648 auth_data = server->private_key;
1650 auth_meth = SILC_AUTH_PASSWORD;
1651 auth_data = conn->passphrase;
1652 auth_data_len = conn->passphrase_len;
1655 auth_meth = SILC_AUTH_PUBLIC_KEY;
1656 auth_data = server->private_key;
1660 entry->data.rekey = rekey;
1662 /* Start connection authentication */
1664 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1665 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1666 auth_data, auth_data_len,
1667 silc_server_ke_auth_compl, sconn);
1670 /* Function that is called when the network connection to a router has
1671 been established. This will continue with the key exchange protocol
1672 with the remote router. */
1674 void silc_server_start_key_exchange(SilcServerConnection sconn)
1676 SilcServer server = sconn->server;
1677 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1678 SilcUnknownEntry entry;
1679 SilcSKEParamsStruct params;
1682 /* Cancel any possible retry timeouts */
1683 silc_schedule_task_del_by_context(server->schedule, sconn);
1685 /* Create packet stream */
1686 sconn->sock = silc_packet_stream_create(server->packet_engine,
1687 server->schedule, sconn->stream);
1689 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1690 silc_stream_destroy(sconn->stream);
1691 if (sconn->callback)
1692 (*sconn->callback)(server, NULL, sconn->callback_context);
1693 silc_server_connection_free(sconn);
1696 server->stat.conn_num++;
1698 /* Set source ID to packet stream */
1699 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1701 if (sconn->callback)
1702 (*sconn->callback)(server, NULL, sconn->callback_context);
1703 silc_packet_stream_destroy(sconn->sock);
1704 silc_server_connection_free(sconn);
1708 /* Create entry for remote entity */
1709 entry = silc_calloc(1, sizeof(*entry));
1711 silc_packet_stream_destroy(sconn->sock);
1712 silc_server_connection_free(sconn);
1715 entry->server = server;
1716 entry->data.sconn = sconn;
1717 silc_packet_set_context(sconn->sock, entry);
1719 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
1721 /* Set Key Exchange flags from configuration, but fall back to global
1723 memset(¶ms, 0, sizeof(params));
1724 SILC_GET_SKE_FLAGS(conn, params.flags);
1725 if (server->config->param.key_exchange_pfs)
1726 params.flags |= SILC_SKE_SP_FLAG_PFS;
1728 /* Start SILC Key Exchange protocol */
1729 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1730 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1731 server->public_key, server->private_key, sconn);
1734 if (sconn->callback)
1735 (*sconn->callback)(server, NULL, sconn->callback_context);
1736 silc_packet_stream_destroy(sconn->sock);
1737 silc_server_connection_free(sconn);
1740 silc_ske_set_callbacks(ske, silc_server_verify_key,
1741 silc_server_ke_completed, sconn->sock);
1743 /* Start key exchange protocol */
1744 params.version = silc_version_string;
1745 params.timeout_secs = server->config->key_exchange_timeout;
1746 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1749 /* Timeout callback that will be called to retry connecting to remote
1750 router. This is used by both normal and router server. This will wait
1751 before retrying the connecting. The timeout is generated by exponential
1752 backoff algorithm. */
1754 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1756 SilcServerConnection sconn = context;
1757 SilcServer server = sconn->server;
1758 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1759 SilcServerConfigConnParams *param =
1760 (conn->param ? conn->param : &server->config->param);
1762 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1763 sconn->remote_port));
1765 /* Calculate next timeout */
1766 if (sconn->retry_count >= 1) {
1767 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1768 if (sconn->retry_timeout > param->reconnect_interval_max)
1769 sconn->retry_timeout = param->reconnect_interval_max;
1771 sconn->retry_timeout = param->reconnect_interval;
1773 sconn->retry_count++;
1774 sconn->retry_timeout = sconn->retry_timeout +
1775 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1777 /* If we've reached max retry count, give up. */
1778 if ((sconn->retry_count > param->reconnect_count) &&
1779 !param->reconnect_keep_trying) {
1780 SILC_LOG_ERROR(("Could not connect, giving up"));
1782 if (sconn->callback)
1783 (*sconn->callback)(server, NULL, sconn->callback_context);
1784 silc_server_connection_free(sconn);
1788 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1790 /* We will lookup a fresh pointer later */
1791 silc_server_config_unref(&sconn->conn);
1793 /* Wait before retrying */
1794 silc_schedule_task_del_by_context(server->schedule, sconn);
1795 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1796 sconn, sconn->retry_timeout, 0);
1799 /* Callback for async connection to remote router */
1801 static void silc_server_connection_established(SilcNetStatus status,
1805 SilcServerConnection sconn = context;
1806 SilcServer server = sconn->server;
1808 silc_schedule_task_del_by_context(server->schedule, sconn);
1813 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1814 sconn->remote_host, sconn->remote_port));
1816 /* Continue with key exchange protocol */
1817 sconn->stream = stream;
1818 silc_server_start_key_exchange(sconn);
1821 case SILC_NET_UNKNOWN_IP:
1822 case SILC_NET_UNKNOWN_HOST:
1823 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1824 sconn->remote_host, sconn->remote_port,
1825 silc_net_get_error_string(status)));
1827 if (sconn->callback)
1828 (*sconn->callback)(server, NULL, sconn->callback_context);
1829 silc_server_connection_free(sconn);
1833 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1834 sconn->remote_host, sconn->remote_port,
1835 silc_net_get_error_string(status)));
1836 if (!sconn->no_reconnect) {
1837 silc_schedule_task_add_timeout(sconn->server->schedule,
1838 silc_server_connect_to_router_retry,
1840 silc_dlist_del(server->conns, sconn);
1842 if (sconn->callback)
1843 (*sconn->callback)(server, NULL, sconn->callback_context);
1844 silc_server_connection_free(sconn);
1850 /* Generic routine to use connect to a router. */
1852 SILC_TASK_CALLBACK(silc_server_connect_router)
1854 SilcServerConnection sconn = context;
1855 SilcServer server = sconn->server;
1856 SilcServerConfigRouter *rconn;
1858 silc_schedule_task_del_by_context(server->schedule, sconn);
1860 /* Don't connect if we are shutting down. */
1861 if (server->server_shutdown) {
1862 if (sconn->callback)
1863 (*sconn->callback)(server, NULL, sconn->callback_context);
1864 silc_server_connection_free(sconn);
1868 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1869 (sconn->backup ? "backup router" : "router"),
1870 sconn->remote_host, sconn->remote_port));
1872 if (!sconn->no_conf) {
1873 /* Find connection configuration */
1874 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1875 sconn->remote_port);
1877 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1878 (sconn->backup ? "backup router" : "router"),
1879 sconn->remote_host, sconn->remote_port));
1880 silc_server_connection_free(sconn);
1883 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1886 /* Connect to remote host */
1888 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1889 server->config->server_info->primary->server_ip),
1890 sconn->remote_host, sconn->remote_port,
1891 server->schedule, silc_server_connection_established,
1894 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1895 sconn->remote_host, sconn->remote_port));
1896 silc_server_connection_free(sconn);
1900 /* Add to connection list */
1901 silc_dlist_add(server->conns, sconn);
1904 /* This function connects to our primary router or if we are a router this
1905 establishes all our primary routes. This is called at the start of the
1906 server to do authentication and key exchange with our router - called
1909 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1911 SilcServer server = context;
1912 SilcServerConnection sconn;
1913 SilcServerConfigRouter *ptr;
1915 /* Don't connect if we are shutting down. */
1916 if (server->server_shutdown)
1919 SILC_LOG_DEBUG(("We are %s",
1920 (server->server_type == SILC_SERVER ?
1921 "normal server" : server->server_type == SILC_ROUTER ?
1922 "router" : "backup router/normal server")));
1924 if (!server->config->routers) {
1925 /* There wasn't a configured router, we will continue but we don't
1926 have a connection to outside world. We will be standalone server. */
1927 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1928 server->standalone = TRUE;
1932 /* Cancel any possible retry timeouts */
1933 silc_schedule_task_del_by_callback(server->schedule,
1934 silc_server_connect_router);
1935 silc_schedule_task_del_by_callback(server->schedule,
1936 silc_server_connect_to_router_retry);
1938 /* Create the connections to all our routes */
1939 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1941 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1942 ptr->backup_router ? "Backup router" : "Router",
1943 ptr->initiator ? "Initiator" : "Responder",
1944 ptr->host, ptr->port));
1946 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1947 ptr->initiator == FALSE && !server->backup_router &&
1948 !silc_server_config_get_backup_router(server))
1949 server->wait_backup = TRUE;
1951 if (!ptr->initiator)
1953 if (ptr->dynamic_connection)
1956 /* Check whether we are connecting or connected to this host already */
1957 if (silc_server_num_sockets_by_remote(server,
1958 silc_net_is_ip(ptr->host) ?
1960 silc_net_is_ip(ptr->host) ?
1961 NULL : ptr->host, ptr->port,
1962 SILC_CONN_ROUTER)) {
1963 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1964 ptr->host, ptr->port));
1966 /* If we don't have primary router and this connection is our
1967 primary router we are in desync. Reconnect to the primary. */
1968 if (server->standalone && !server->router) {
1970 SilcPacketStream sock;
1971 SilcServerConfigRouter *primary =
1972 silc_server_config_get_primary_router(server);
1975 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1976 ptr->host, ptr->port);
1979 server->backup_noswitch = TRUE;
1980 silc_server_free_sock_user_data(server, sock, NULL);
1981 silc_server_disconnect_remote(server, sock, 0, NULL);
1982 server->backup_noswitch = FALSE;
1983 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1989 /* Allocate connection object for hold connection specific stuff. */
1990 sconn = silc_calloc(1, sizeof(*sconn));
1993 sconn->server = server;
1994 sconn->remote_host = strdup(ptr->host);
1995 sconn->remote_port = ptr->port;
1996 sconn->backup = ptr->backup_router;
1997 if (sconn->backup) {
1998 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
1999 sconn->backup_replace_port = ptr->backup_replace_port;
2002 SILC_LOG_DEBUG(("Created connection %p", sconn));
2004 if (!server->router_conn && !sconn->backup)
2005 server->router_conn = sconn;
2008 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2014 /************************ Accepting new connection **************************/
2016 /* After this is called, server don't wait for backup router anymore.
2017 This gets called automatically even after we have backup router
2018 connection established. */
2020 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2022 SilcServer server = context;
2023 server->wait_backup = FALSE;
2026 /* Authentication data callback */
2029 silc_server_accept_get_auth(SilcConnAuth connauth,
2030 SilcConnectionType conn_type,
2031 unsigned char **passphrase,
2032 SilcUInt32 *passphrase_len,
2033 SilcSKR *repository,
2036 SilcPacketStream sock = context;
2037 SilcUnknownEntry entry = silc_packet_get_context(sock);
2038 SilcServer server = entry->server;
2040 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2042 /* Remote end is client */
2043 if (conn_type == SILC_CONN_CLIENT) {
2044 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2048 *passphrase = cconfig->passphrase;
2049 *passphrase_len = cconfig->passphrase_len;
2050 if (cconfig->publickeys)
2051 *repository = server->repository;
2053 if (cconfig->publickeys) {
2054 if (server->config->prefer_passphrase_auth) {
2058 *passphrase_len = 0;
2062 entry->conn_type = conn_type;
2066 /* Remote end is server */
2067 if (conn_type == SILC_CONN_SERVER) {
2068 SilcServerConfigServer *sconfig;
2070 /* If we are normal server, don't accept the connection */
2071 if (server->server_type == SILC_SERVER)
2074 sconfig = entry->sconfig.ref_ptr;
2078 *passphrase = sconfig->passphrase;
2079 *passphrase_len = sconfig->passphrase_len;
2080 if (sconfig->publickeys)
2081 *repository = server->repository;
2083 if (sconfig->publickeys) {
2084 if (server->config->prefer_passphrase_auth) {
2088 *passphrase_len = 0;
2092 entry->conn_type = conn_type;
2096 /* Remote end is router */
2097 if (conn_type == SILC_CONN_ROUTER) {
2098 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2102 *passphrase = rconfig->passphrase;
2103 *passphrase_len = rconfig->passphrase_len;
2104 if (rconfig->publickeys)
2105 *repository = server->repository;
2107 if (rconfig->publickeys) {
2108 if (server->config->prefer_passphrase_auth) {
2112 *passphrase_len = 0;
2116 entry->conn_type = conn_type;
2123 /* Authentication completion callback. */
2126 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2129 SilcPacketStream sock = context;
2130 SilcUnknownEntry entry = silc_packet_get_context(sock);
2131 SilcIDListData idata = (SilcIDListData)entry;
2132 SilcServer server = entry->server;
2133 SilcServerConfigConnParams *param = &server->config->param;
2134 SilcServerConnection sconn;
2136 const char *hostname, *ip;
2140 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2141 NULL, &hostname, &ip, &port);
2143 if (success == FALSE) {
2144 /* Authentication failed */
2145 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2146 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2147 server->stat.auth_failures++;
2148 silc_server_disconnect_remote(server, sock,
2149 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2150 silc_server_config_unref(&entry->cconfig);
2151 silc_server_config_unref(&entry->sconfig);
2152 silc_server_config_unref(&entry->rconfig);
2153 silc_server_free_sock_user_data(server, sock, NULL);
2157 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2159 switch (entry->conn_type) {
2160 case SILC_CONN_CLIENT:
2162 SilcClientEntry client;
2163 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2165 /* Verify whether this connection is after all allowed to connect */
2166 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2167 &server->config->param,
2169 silc_connauth_get_ske(connauth))) {
2170 server->stat.auth_failures++;
2174 /* If we are primary router and we have backup router configured
2175 but it has not connected to use yet, do not accept any other
2177 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2178 !server->backup_router) {
2179 SilcServerConfigRouter *router;
2180 router = silc_server_config_get_backup_router(server);
2181 if (router && strcmp(server->config->server_info->primary->server_ip,
2183 silc_server_find_socket_by_host(server,
2185 router->backup_replace_ip, 0)) {
2186 SILC_LOG_INFO(("Will not accept connections because we do "
2187 "not have backup router connection established"));
2188 silc_server_disconnect_remote(server, sock,
2189 SILC_STATUS_ERR_PERM_DENIED,
2190 "We do not have connection to backup "
2191 "router established, try later");
2192 silc_server_config_unref(&entry->cconfig);
2193 silc_server_config_unref(&entry->sconfig);
2194 silc_server_config_unref(&entry->rconfig);
2195 silc_server_free_sock_user_data(server, sock, NULL);
2196 server->stat.auth_failures++;
2198 /* From here on, wait 20 seconds for the backup router to appear. */
2199 silc_schedule_task_add_timeout(server->schedule,
2200 silc_server_backup_router_wait,
2201 (void *)server, 20, 0);
2206 SILC_LOG_DEBUG(("Remote host is client"));
2207 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2210 /* Add the client to the client ID cache. The nickname and Client ID
2211 and other information is created after we have received NEW_CLIENT
2212 packet from client. */
2213 client = silc_idlist_add_client(server->local_list,
2214 NULL, NULL, NULL, NULL, NULL, sock);
2216 SILC_LOG_ERROR(("Could not add new client to cache"));
2217 server->stat.auth_failures++;
2218 silc_server_disconnect_remote(server, sock,
2219 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2220 silc_server_config_unref(&entry->cconfig);
2221 silc_server_config_unref(&entry->sconfig);
2222 silc_server_config_unref(&entry->rconfig);
2223 silc_server_free_sock_user_data(server, sock, NULL);
2226 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2227 entry->data.conn_type = SILC_CONN_CLIENT;
2230 server->stat.my_clients++;
2231 server->stat.clients++;
2232 server->stat.cell_clients++;
2234 /* Get connection parameters */
2236 param = conn->param;
2238 if (!param->keepalive_secs)
2239 param->keepalive_secs = server->config->param.keepalive_secs;
2241 if (!param->qos && server->config->param.qos) {
2242 param->qos = server->config->param.qos;
2243 param->qos_rate_limit = server->config->param.qos_rate_limit;
2244 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2245 param->qos_limit_sec = server->config->param.qos_limit_sec;
2246 param->qos_limit_usec = server->config->param.qos_limit_usec;
2249 /* Check if to be anonymous connection */
2250 if (param->anonymous)
2251 client->mode |= SILC_UMODE_ANONYMOUS;
2254 /* Add public key to repository */
2255 SILC_LOG_DEBUG(("Add client public key to repository"));
2256 if (!silc_server_get_public_key_by_client(server, client, NULL))
2257 silc_skr_add_public_key_simple(server->repository,
2258 entry->data.public_key,
2259 SILC_SKR_USAGE_IDENTIFICATION, client,
2262 id_entry = (void *)client;
2266 case SILC_CONN_SERVER:
2267 case SILC_CONN_ROUTER:
2269 SilcServerEntry new_server;
2270 SilcBool initiator = FALSE;
2271 SilcBool backup_local = FALSE;
2272 SilcBool backup_router = FALSE;
2273 char *backup_replace_ip = NULL;
2274 SilcUInt16 backup_replace_port = 0;
2275 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2276 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2278 /* If we are backup router and this is incoming server connection
2279 and we do not have connection to primary router, do not allow
2281 if (server->server_type == SILC_BACKUP_ROUTER &&
2282 entry->conn_type == SILC_CONN_SERVER &&
2283 !SILC_PRIMARY_ROUTE(server)) {
2284 SILC_LOG_INFO(("Will not accept server connection because we do "
2285 "not have primary router connection established"));
2286 silc_server_disconnect_remote(server, sock,
2287 SILC_STATUS_ERR_PERM_DENIED,
2288 "We do not have connection to primary "
2289 "router established, try later");
2290 silc_server_config_unref(&entry->cconfig);
2291 silc_server_config_unref(&entry->sconfig);
2292 silc_server_config_unref(&entry->rconfig);
2293 silc_server_free_sock_user_data(server, sock, NULL);
2294 server->stat.auth_failures++;
2298 if (entry->conn_type == SILC_CONN_ROUTER) {
2299 /* Verify whether this connection is after all allowed to connect */
2300 if (!silc_server_connection_allowed(server, sock,
2302 &server->config->param,
2303 rconn ? rconn->param : NULL,
2304 silc_connauth_get_ske(connauth))) {
2305 silc_server_config_unref(&entry->cconfig);
2306 silc_server_config_unref(&entry->sconfig);
2307 silc_server_config_unref(&entry->rconfig);
2308 server->stat.auth_failures++;
2314 param = rconn->param;
2316 if (!param->keepalive_secs)
2317 param->keepalive_secs = server->config->param.keepalive_secs;
2319 if (!param->qos && server->config->param.qos) {
2320 param->qos = server->config->param.qos;
2321 param->qos_rate_limit = server->config->param.qos_rate_limit;
2322 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2323 param->qos_limit_sec = server->config->param.qos_limit_sec;
2324 param->qos_limit_usec = server->config->param.qos_limit_usec;
2328 initiator = rconn->initiator;
2329 backup_local = rconn->backup_local;
2330 backup_router = rconn->backup_router;
2331 backup_replace_ip = rconn->backup_replace_ip;
2332 backup_replace_port = rconn->backup_replace_port;
2336 if (entry->conn_type == SILC_CONN_SERVER) {
2337 /* Verify whether this connection is after all allowed to connect */
2338 if (!silc_server_connection_allowed(server, sock,
2340 &server->config->param,
2341 srvconn ? srvconn->param : NULL,
2342 silc_connauth_get_ske(connauth))) {
2343 server->stat.auth_failures++;
2347 if (srvconn->param) {
2348 param = srvconn->param;
2350 if (!param->keepalive_secs)
2351 param->keepalive_secs = server->config->param.keepalive_secs;
2353 if (!param->qos && server->config->param.qos) {
2354 param->qos = server->config->param.qos;
2355 param->qos_rate_limit = server->config->param.qos_rate_limit;
2356 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2357 param->qos_limit_sec = server->config->param.qos_limit_sec;
2358 param->qos_limit_usec = server->config->param.qos_limit_usec;
2362 backup_router = srvconn->backup_router;
2366 /* If we are primary router and we have backup router configured
2367 but it has not connected to use yet, do not accept any other
2369 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2370 !server->backup_router && !backup_router) {
2371 SilcServerConfigRouter *router;
2372 router = silc_server_config_get_backup_router(server);
2373 if (router && strcmp(server->config->server_info->primary->server_ip,
2375 silc_server_find_socket_by_host(server,
2377 router->backup_replace_ip, 0)) {
2378 SILC_LOG_INFO(("Will not accept connections because we do "
2379 "not have backup router connection established"));
2380 silc_server_disconnect_remote(server, sock,
2381 SILC_STATUS_ERR_PERM_DENIED,
2382 "We do not have connection to backup "
2383 "router established, try later");
2384 silc_server_config_unref(&entry->cconfig);
2385 silc_server_config_unref(&entry->sconfig);
2386 silc_server_config_unref(&entry->rconfig);
2387 silc_server_free_sock_user_data(server, sock, NULL);
2388 server->stat.auth_failures++;
2390 /* From here on, wait 20 seconds for the backup router to appear. */
2391 silc_schedule_task_add_timeout(server->schedule,
2392 silc_server_backup_router_wait,
2393 (void *)server, 20, 0);
2398 SILC_LOG_DEBUG(("Remote host is %s",
2399 entry->conn_type == SILC_CONN_SERVER ?
2400 "server" : (backup_router ?
2401 "backup router" : "router")));
2402 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2403 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2404 "server" : (backup_router ?
2405 "backup router" : "router")));
2407 /* Add the server into server cache. The server name and Server ID
2408 is updated after we have received NEW_SERVER packet from the
2409 server. We mark ourselves as router for this server if we really
2412 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2413 server->local_list : (backup_router ?
2414 server->local_list :
2415 server->global_list)),
2417 (entry->conn_type == SILC_CONN_SERVER ?
2418 SILC_SERVER : SILC_ROUTER),
2420 (entry->conn_type == SILC_CONN_SERVER ?
2421 server->id_entry : (backup_router ?
2422 server->id_entry : NULL)),
2425 SILC_LOG_ERROR(("Could not add new server to cache"));
2426 silc_server_disconnect_remote(server, sock,
2427 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2428 silc_server_config_unref(&entry->cconfig);
2429 silc_server_config_unref(&entry->sconfig);
2430 silc_server_config_unref(&entry->rconfig);
2431 silc_server_free_sock_user_data(server, sock, NULL);
2432 server->stat.auth_failures++;
2435 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2436 entry->data.conn_type = entry->conn_type;
2438 id_entry = (void *)new_server;
2440 /* If the incoming connection is router and marked as backup router
2441 then add it to be one of our backups */
2442 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2443 /* Change it back to SERVER type since that's what it really is. */
2445 entry->data.conn_type = SILC_CONN_SERVER;
2446 new_server->server_type = SILC_BACKUP_ROUTER;
2448 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2449 ("Backup router %s is now online",
2452 /* Remove the backup waiting with timeout */
2453 silc_schedule_task_add_timeout(server->schedule,
2454 silc_server_backup_router_wait,
2455 (void *)server, 10, 0);
2459 if (entry->data.conn_type == SILC_CONN_SERVER) {
2460 server->stat.my_servers++;
2461 server->stat.servers++;
2462 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2464 server->stat.my_routers++;
2465 server->stat.routers++;
2466 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2469 /* Check whether this connection is to be our primary router connection
2470 if we do not already have the primary route. */
2471 if (!backup_router &&
2472 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2473 if (silc_server_config_is_primary_route(server) && !initiator)
2476 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2477 server->standalone = FALSE;
2478 if (!server->id_entry->router) {
2479 server->id_entry->router = id_entry;
2480 server->router = id_entry;
2492 /* Add connection to server->conns so that we know we have connection
2494 sconn = silc_calloc(1, sizeof(*sconn));
2495 sconn->server = server;
2497 sconn->remote_host = strdup(hostname);
2498 sconn->remote_port = port;
2499 silc_dlist_add(server->conns, sconn);
2500 idata->sconn = sconn;
2501 idata->last_receive = time(NULL);
2503 /* Add the common data structure to the ID entry. */
2504 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2505 silc_packet_set_context(sock, id_entry);
2507 /* Connection has been fully established now. Everything is ok. */
2508 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2510 /* Perform Quality of Service */
2512 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2513 param->qos_rate_limit, param->qos_bytes_limit,
2514 param->qos_limit_sec, param->qos_limit_usec);
2516 silc_server_config_unref(&entry->cconfig);
2517 silc_server_config_unref(&entry->sconfig);
2518 silc_server_config_unref(&entry->rconfig);
2522 silc_ske_free(silc_connauth_get_ske(connauth));
2523 silc_connauth_free(connauth);
2526 /* SKE completion callback. We set the new keys into use here. */
2529 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2530 SilcSKESecurityProperties prop,
2531 SilcSKEKeyMaterial keymat,
2532 SilcSKERekeyMaterial rekey,
2535 SilcPacketStream sock = context;
2536 SilcUnknownEntry entry = silc_packet_get_context(sock);
2537 SilcIDListData idata = (SilcIDListData)entry;
2538 SilcServer server = entry->server;
2539 SilcConnAuth connauth;
2540 SilcCipher send_key, receive_key;
2541 SilcHmac hmac_send, hmac_receive;
2548 if (status != SILC_SKE_STATUS_OK) {
2550 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2551 silc_ske_map_status(status), entry->hostname, entry->ip));
2553 silc_server_disconnect_remote(server, sock,
2554 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2555 silc_server_config_unref(&entry->cconfig);
2556 silc_server_config_unref(&entry->sconfig);
2557 silc_server_config_unref(&entry->rconfig);
2558 silc_server_free_sock_user_data(server, sock, NULL);
2562 SILC_LOG_DEBUG(("Setting keys into use"));
2564 /* Set the keys into use. The data will be encrypted after this. */
2565 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2566 &hmac_send, &hmac_receive, &hash)) {
2567 /* Error setting keys */
2569 silc_server_disconnect_remote(server, sock,
2570 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2571 silc_server_free_sock_user_data(server, sock, NULL);
2574 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2575 hmac_receive, FALSE);
2577 idata->rekey = rekey;
2578 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2579 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2580 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2582 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2584 SILC_LOG_DEBUG(("Starting connection authentication"));
2585 server->stat.auth_attempts++;
2587 connauth = silc_connauth_alloc(server->schedule, ske,
2588 server->config->conn_auth_timeout);
2590 /** Error allocating auth protocol */
2592 silc_server_disconnect_remote(server, sock,
2593 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2594 silc_server_config_unref(&entry->cconfig);
2595 silc_server_config_unref(&entry->sconfig);
2596 silc_server_config_unref(&entry->rconfig);
2597 silc_server_free_sock_user_data(server, sock, NULL);
2601 /* Start connection authentication */
2603 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2604 silc_server_accept_auth_compl, sock);
2607 /* Accept new TCP connection */
2609 static void silc_server_accept_new_connection(SilcNetStatus status,
2613 SilcServer server = context;
2614 SilcPacketStream packet_stream;
2615 SilcServerConfigClient *cconfig = NULL;
2616 SilcServerConfigServer *sconfig = NULL;
2617 SilcServerConfigRouter *rconfig = NULL;
2618 SilcServerConfigDeny *deny;
2619 SilcUnknownEntry entry;
2621 SilcSKEParamsStruct params;
2622 char *hostname, *ip;
2625 SILC_LOG_DEBUG(("Accepting new connection"));
2627 /* Check for maximum allowed connections */
2628 server->stat.conn_attempts++;
2629 if (silc_dlist_count(server->conns) >
2630 server->config->param.connections_max) {
2631 SILC_LOG_ERROR(("Refusing connection, server is full"));
2632 server->stat.conn_failures++;
2633 silc_stream_destroy(stream);
2637 /* Get hostname, IP and port */
2638 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2639 (const char **)&ip, &port)) {
2640 /* Bad socket stream */
2641 server->stat.conn_failures++;
2642 silc_stream_destroy(stream);
2646 /* Create packet stream */
2647 packet_stream = silc_packet_stream_create(server->packet_engine,
2648 server->schedule, stream);
2649 if (!packet_stream) {
2650 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2651 server->stat.conn_failures++;
2652 silc_stream_destroy(stream);
2655 server->stat.conn_num++;
2657 SILC_LOG_DEBUG(("Created packet stream %p", packet_stream));
2659 /* Set source ID to packet stream */
2660 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2663 server->stat.conn_failures++;
2664 silc_packet_stream_destroy(packet_stream);
2668 /* Check whether this connection is denied to connect to us. */
2669 deny = silc_server_config_find_denied(server, ip);
2671 deny = silc_server_config_find_denied(server, hostname);
2673 /* The connection is denied */
2674 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2675 silc_server_disconnect_remote(server, packet_stream,
2676 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2678 silc_server_free_sock_user_data(server, packet_stream, NULL);
2682 /* Check whether we have configured this sort of connection at all. We
2683 have to check all configurations since we don't know what type of
2684 connection this is. */
2685 if (!(cconfig = silc_server_config_find_client(server, ip)))
2686 cconfig = silc_server_config_find_client(server, hostname);
2687 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2688 sconfig = silc_server_config_find_server_conn(server, hostname);
2689 if (server->server_type == SILC_ROUTER)
2690 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2691 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2692 if (!cconfig && !sconfig && !rconfig) {
2693 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2694 server->stat.conn_failures++;
2695 silc_server_disconnect_remote(server, packet_stream,
2696 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2697 silc_server_free_sock_user_data(server, packet_stream, NULL);
2701 /* The connection is allowed */
2702 entry = silc_calloc(1, sizeof(*entry));
2704 server->stat.conn_failures++;
2705 silc_server_disconnect_remote(server, packet_stream,
2706 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2707 silc_server_free_sock_user_data(server, packet_stream, NULL);
2710 entry->hostname = hostname;
2713 entry->server = server;
2714 entry->data.conn_type = SILC_CONN_UNKNOWN;
2715 silc_packet_set_context(packet_stream, entry);
2717 SILC_LOG_DEBUG(("Created unknown connection %p", entry));
2719 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2720 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2721 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2723 /* Take flags for key exchange. Since we do not know what type of connection
2724 this is, we go through all found configurations and use the global ones
2725 as well. This will result always into strictest key exchange flags. */
2726 memset(¶ms, 0, sizeof(params));
2727 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2728 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2729 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2730 if (server->config->param.key_exchange_pfs)
2731 params.flags |= SILC_SKE_SP_FLAG_PFS;
2733 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2734 server->stat.conn_attempts++;
2736 /* Start SILC Key Exchange protocol */
2737 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2738 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2739 server->public_key, server->private_key,
2742 server->stat.conn_failures++;
2743 silc_server_disconnect_remote(server, packet_stream,
2744 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2745 silc_server_free_sock_user_data(server, packet_stream, NULL);
2748 silc_ske_set_callbacks(ske, silc_server_verify_key,
2749 silc_server_accept_completed, packet_stream);
2751 /* Start key exchange protocol */
2752 params.version = silc_version_string;
2753 params.timeout_secs = server->config->key_exchange_timeout;
2754 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2758 /********************************** Rekey ***********************************/
2760 /* Initiator rekey completion callback */
2762 static void silc_server_rekey_completion(SilcSKE ske,
2763 SilcSKEStatus status,
2764 const SilcSKESecurityProperties prop,
2765 const SilcSKEKeyMaterial keymat,
2766 SilcSKERekeyMaterial rekey,
2769 SilcPacketStream sock = context;
2770 SilcIDListData idata = silc_packet_get_context(sock);
2771 SilcServer server = idata->sconn->server;
2773 idata->sconn->op = NULL;
2774 if (status != SILC_SKE_STATUS_OK) {
2775 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2776 idata->sconn->remote_host));
2780 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2781 idata->sconn->remote_host, idata->sconn->remote_port,
2782 SILC_CONNTYPE_STRING(idata->conn_type)));
2784 /* Save rekey data for next rekey */
2785 idata->rekey = rekey;
2787 /* Register new rekey timeout */
2788 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2789 sock, idata->sconn->rekey_timeout, 0);
2792 /* Rekey callback. Start rekey as initiator */
2794 SILC_TASK_CALLBACK(silc_server_do_rekey)
2796 SilcServer server = app_context;
2797 SilcPacketStream sock = context;
2798 SilcIDListData idata = silc_packet_get_context(sock);
2801 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2803 /* Do not execute rekey with disabled connections */
2804 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2807 /* If another protocol is active do not start rekey */
2808 if (idata->sconn->op) {
2809 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2810 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2815 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2816 idata->sconn->remote_host, idata->sconn->remote_port,
2817 SILC_CONNTYPE_STRING(idata->conn_type)));
2820 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2821 server->public_key, NULL, sock);
2825 /* Set SKE callbacks */
2826 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2829 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2832 /* Responder rekey completion callback */
2835 silc_server_rekey_resp_completion(SilcSKE ske,
2836 SilcSKEStatus status,
2837 const SilcSKESecurityProperties prop,
2838 const SilcSKEKeyMaterial keymat,
2839 SilcSKERekeyMaterial rekey,
2842 SilcPacketStream sock = context;
2843 SilcIDListData idata = silc_packet_get_context(sock);
2845 idata->sconn->op = NULL;
2846 if (status != SILC_SKE_STATUS_OK) {
2847 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2848 idata->sconn->remote_host));
2852 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2853 idata->sconn->remote_host, idata->sconn->remote_port,
2854 SILC_CONNTYPE_STRING(idata->conn_type)));
2856 /* Save rekey data for next rekey */
2857 idata->rekey = rekey;
2860 /* Start rekey as responder */
2862 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2865 SilcIDListData idata = silc_packet_get_context(sock);
2868 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s], sock %p",
2869 idata->sconn->remote_host, idata->sconn->remote_port,
2870 SILC_CONNTYPE_STRING(idata->conn_type), sock));
2873 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2874 server->public_key, NULL, sock);
2876 silc_packet_free(packet);
2880 /* Set SKE callbacks */
2881 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2884 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2889 /****************************** Disconnection *******************************/
2891 /* Destroys packet stream. */
2893 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2895 silc_packet_stream_unref(context);
2898 /* Closes connection to socket connection */
2900 void silc_server_close_connection(SilcServer server,
2901 SilcPacketStream sock)
2903 SilcIDListData idata = silc_packet_get_context(sock);
2905 const char *hostname;
2908 if (!silc_packet_stream_is_valid(sock))
2911 memset(tmp, 0, sizeof(tmp));
2912 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2913 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2914 NULL, &hostname, NULL, &port);
2915 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2916 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2917 tmp[0] ? tmp : ""));
2919 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2921 if (idata && idata->sconn) {
2922 silc_server_connection_free(idata->sconn);
2923 idata->sconn = NULL;
2926 /* Take a reference and then destroy the stream. The last reference
2927 is released later in a timeout callback. */
2928 silc_packet_stream_ref(sock);
2929 silc_packet_stream_destroy(sock);
2931 /* Close connection with timeout */
2932 server->stat.conn_num--;
2933 silc_schedule_task_del_by_all(server->schedule, 0,
2934 silc_server_close_connection_final, sock);
2935 silc_schedule_task_add_timeout(server->schedule,
2936 silc_server_close_connection_final,
2940 /* Sends disconnect message to remote connection and disconnects the
2943 void silc_server_disconnect_remote(SilcServer server,
2944 SilcPacketStream sock,
2945 SilcStatus status, ...)
2947 unsigned char buf[512];
2954 SILC_LOG_DEBUG(("Disconnecting remote host, sock %p", sock));
2956 va_start(ap, status);
2957 cp = va_arg(ap, char *);
2959 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2962 /* Send SILC_PACKET_DISCONNECT */
2963 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2964 SILC_STR_UI_CHAR(status),
2965 SILC_STR_UI8_STRING(cp ? buf : NULL),
2968 /* Close connection */
2969 silc_server_close_connection(server, sock);
2972 /* Frees client data and notifies about client's signoff. */
2974 void silc_server_free_client_data(SilcServer server,
2975 SilcPacketStream sock,
2976 SilcClientEntry client,
2978 const char *signoff)
2980 SILC_LOG_DEBUG(("Freeing client %p data", client));
2983 /* Check if anyone is watching this nickname */
2984 if (server->server_type == SILC_ROUTER)
2985 silc_server_check_watcher_list(server, client, NULL,
2986 SILC_NOTIFY_TYPE_SIGNOFF);
2988 /* Send SIGNOFF notify to routers. */
2990 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2991 SILC_BROADCAST(server), client->id,
2995 /* Remove client from all channels */
2997 silc_server_remove_from_channels(server, NULL, client,
2998 TRUE, (char *)signoff, TRUE, FALSE);
3000 silc_server_remove_from_channels(server, NULL, client,
3001 FALSE, NULL, FALSE, FALSE);
3003 /* Remove this client from watcher list if it is */
3004 silc_server_del_from_watcher_list(server, client);
3006 /* Remove client's public key from repository, this will free it too. */
3007 if (client->data.public_key) {
3008 silc_skr_del_public_key(server->repository, client->data.public_key,
3010 client->data.public_key = NULL;
3013 /* Update statistics */
3014 server->stat.my_clients--;
3015 server->stat.clients--;
3016 if (server->stat.cell_clients)
3017 server->stat.cell_clients--;
3018 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
3019 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
3020 silc_schedule_task_del_by_context(server->schedule, client);
3022 if (client->data.sconn) {
3023 silc_server_connection_free(client->data.sconn);
3024 client->data.sconn = NULL;
3027 /* We will not delete the client entry right away. We will take it
3028 into history (for WHOWAS command) for 5 minutes, unless we're
3029 shutting down server. */
3030 if (!server->server_shutdown) {
3031 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3033 client->router = NULL;
3034 client->connection = NULL;
3035 client->data.created = silc_time();
3036 silc_dlist_del(server->expired_clients, client);
3037 silc_dlist_add(server->expired_clients, client);
3039 /* Delete directly since we're shutting down server */
3040 SILC_LOG_DEBUG(("Delete client directly"));
3041 silc_idlist_del_data(client);
3042 silc_idlist_del_client(server->local_list, client);
3046 /* Frees user_data pointer from socket connection object. This also sends
3047 appropriate notify packets to the network to inform about leaving
3050 void silc_server_free_sock_user_data(SilcServer server,
3051 SilcPacketStream sock,
3052 const char *signoff_message)
3054 SilcIDListData idata;
3061 SILC_LOG_DEBUG(("Start, sock %p", sock));
3063 idata = silc_packet_get_context(sock);
3067 silc_schedule_task_del_by_all(server->schedule, 0, silc_server_do_rekey,
3070 /* Cancel active protocols */
3072 if (idata->sconn && idata->sconn->op) {
3073 SILC_LOG_DEBUG(("Abort active protocol"));
3074 silc_async_abort(idata->sconn->op, NULL, NULL);
3076 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3077 ((SilcUnknownEntry)idata)->op) {
3078 SILC_LOG_DEBUG(("Abort active protocol"));
3079 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3083 switch (idata->conn_type) {
3084 case SILC_CONN_CLIENT:
3086 SilcClientEntry client_entry = (SilcClientEntry)idata;
3087 silc_server_free_client_data(server, sock, client_entry, TRUE,
3089 silc_packet_set_context(sock, NULL);
3093 case SILC_CONN_SERVER:
3094 case SILC_CONN_ROUTER:
3096 SilcServerEntry user_data = (SilcServerEntry)idata;
3097 SilcServerEntry backup_router = NULL;
3099 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3102 backup_router = silc_server_backup_get(server, user_data->id);
3104 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3105 backup_router == server->id_entry &&
3106 idata->conn_type != SILC_CONN_ROUTER)
3107 backup_router = NULL;
3109 if (server->server_shutdown || server->backup_noswitch)
3110 backup_router = NULL;
3112 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3113 NULL, NULL, &ip, &port);
3115 /* If this was our primary router connection then we're lost to
3116 the outside world. */
3117 if (server->router == user_data) {
3118 /* Check whether we have a backup router connection */
3119 if (!backup_router || backup_router == user_data) {
3120 if (!server->no_reconnect)
3121 silc_server_create_connections(server);
3122 server->id_entry->router = NULL;
3123 server->router = NULL;
3124 server->standalone = TRUE;
3125 server->backup_primary = FALSE;
3126 backup_router = NULL;
3128 if (server->id_entry != backup_router) {
3129 SILC_LOG_INFO(("New primary router is backup router %s",
3130 backup_router->server_name));
3131 server->id_entry->router = backup_router;
3132 server->router = backup_router;
3133 server->router_connect = time(0);
3134 server->backup_primary = TRUE;
3135 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3137 /* Send START_USE to backup router to indicate we have switched */
3138 silc_server_backup_send_start_use(server,
3139 backup_router->connection,
3142 SILC_LOG_INFO(("We are now new primary router in this cell"));
3143 server->id_entry->router = NULL;
3144 server->router = NULL;
3145 server->standalone = TRUE;
3148 /* We stop here to take a breath */
3151 if (server->backup_router) {
3152 server->server_type = SILC_ROUTER;
3154 /* We'll need to constantly try to reconnect to the primary
3155 router so that we'll see when it comes back online. */
3156 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3157 silc_server_backup_connected,
3161 /* Mark this connection as replaced */
3162 silc_server_backup_replaced_add(server, user_data->id,
3165 } else if (backup_router) {
3166 SILC_LOG_INFO(("Enabling the use of backup router %s",
3167 backup_router->server_name));
3169 /* Mark this connection as replaced */
3170 silc_server_backup_replaced_add(server, user_data->id,
3172 } else if (server->server_type == SILC_SERVER &&
3173 idata->conn_type == SILC_CONN_ROUTER) {
3174 /* Reconnect to the router (backup) */
3175 if (!server->no_reconnect)
3176 silc_server_create_connections(server);
3179 if (user_data->server_name)
3180 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3181 ("Server %s signoff", user_data->server_name));
3183 if (!backup_router) {
3184 /* Remove all servers that are originated from this server, and
3185 remove the clients of those servers too. */
3186 silc_server_remove_servers_by_server(server, user_data, TRUE);
3189 /* Remove the clients that this server owns as they will become
3190 invalid now too. For backup router the server is actually
3191 coming from the primary router, so mark that as the owner
3193 if (server->server_type == SILC_BACKUP_ROUTER &&
3194 sock->type == SILC_CONN_SERVER)
3195 silc_server_remove_clients_by_server(server, server->router,
3199 silc_server_remove_clients_by_server(server, user_data,
3202 /* Remove channels owned by this server */
3203 if (server->server_type == SILC_SERVER)
3204 silc_server_remove_channels_by_server(server, user_data);
3206 /* Enable local server connections that may be disabled */
3207 silc_server_local_servers_toggle_enabled(server, TRUE);
3209 /* Update the client entries of this server to the new backup
3210 router. If we are the backup router we also resolve the real
3211 servers for the clients. After updating is over this also
3212 removes the clients that this server explicitly owns. */
3213 silc_server_update_clients_by_server(server, user_data,
3214 backup_router, TRUE);
3216 /* If we are router and just lost our primary router (now standlaone)
3217 we remove everything that was behind it, since we don't know
3219 if (server->server_type == SILC_ROUTER && server->standalone)
3220 /* Remove all servers that are originated from this server, and
3221 remove the clients of those servers too. */
3222 silc_server_remove_servers_by_server(server, user_data, TRUE);
3224 /* Finally remove the clients that are explicitly owned by this
3225 server. They go down with the server. */
3226 silc_server_remove_clients_by_server(server, user_data,
3229 /* Update our server cache to use the new backup router too. */
3230 silc_server_update_servers_by_server(server, user_data, backup_router);
3231 if (server->server_type == SILC_SERVER)
3232 silc_server_update_channels_by_server(server, user_data,
3235 /* Send notify about primary router going down to local operators */
3236 if (server->backup_router)
3237 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3238 SILC_NOTIFY_TYPE_NONE,
3239 ("%s switched to backup router %s "
3240 "(we are primary router now)",
3241 server->server_name, server->server_name));
3242 else if (server->router)
3243 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3244 SILC_NOTIFY_TYPE_NONE,
3245 ("%s switched to backup router %s",
3246 server->server_name,
3247 server->router->server_name));
3249 server->backup_noswitch = FALSE;
3252 silc_server_connection_free(idata->sconn);
3253 idata->sconn = NULL;
3257 if (idata->conn_type == SILC_CONN_SERVER) {
3258 server->stat.my_servers--;
3259 server->stat.servers--;
3260 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3261 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3262 server->stat.my_routers--;
3263 server->stat.routers--;
3264 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3266 if (server->server_type == SILC_ROUTER)
3267 server->stat.cell_servers--;
3269 /* Free the server entry */
3270 silc_server_backup_del(server, user_data);
3271 silc_server_backup_replaced_del(server, user_data);
3272 silc_idlist_del_data(user_data);
3273 if (!silc_idlist_del_server(server->local_list, user_data))
3274 silc_idlist_del_server(server->global_list, user_data);
3276 if (backup_router && backup_router != server->id_entry) {
3277 /* Announce all of our stuff that was created about 5 minutes ago.
3278 The backup router knows all the other stuff already. */
3279 if (server->server_type == SILC_ROUTER)
3280 silc_server_announce_servers(server, FALSE, time(0) - 300,
3281 backup_router->connection);
3283 /* Announce our clients and channels to the router */
3284 silc_server_announce_clients(server, time(0) - 300,
3285 backup_router->connection);
3286 silc_server_announce_channels(server, time(0) - 300,
3287 backup_router->connection);
3290 silc_packet_set_context(sock, NULL);
3296 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3298 SILC_LOG_DEBUG(("Freeing unknown connection data %p", entry));
3301 if (server->router_conn == idata->sconn) {
3302 if (!server->no_reconnect)
3303 silc_server_create_connections(server);
3304 server->router_conn = NULL;
3307 silc_server_connection_free(idata->sconn);
3308 idata->sconn = NULL;
3310 silc_idlist_del_data(idata);
3312 silc_packet_set_context(sock, NULL);
3318 /* Removes client from all channels it has joined. This is used when client
3319 connection is disconnected. If the client on a channel is last, the
3320 channel is removed as well. This sends the SIGNOFF notify types. */
3322 void silc_server_remove_from_channels(SilcServer server,
3323 SilcPacketStream sock,
3324 SilcClientEntry client,
3326 const char *signoff_message,
3330 SilcChannelEntry channel;
3331 SilcChannelClientEntry chl;
3332 SilcHashTableList htl;
3333 SilcBuffer clidp = NULL;
3338 if (notify && !client->id)
3341 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3342 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3345 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3350 /* Remove the client from all channels. The client is removed from
3351 the channels' user list. */
3352 silc_hash_table_list(client->channels, &htl);
3353 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3354 channel = chl->channel;
3356 /* Remove channel if this is last client leaving the channel, unless
3357 the channel is permanent. */
3358 if (server->server_type != SILC_SERVER &&
3359 silc_hash_table_count(channel->user_list) < 2) {
3360 silc_server_channel_delete(server, channel);
3364 silc_hash_table_del(client->channels, channel);
3365 silc_hash_table_del(channel->user_list, client);
3366 channel->user_count--;
3368 /* If there is no global users on the channel anymore mark the channel
3369 as local channel. Do not check if the removed client is local client. */
3370 if (server->server_type == SILC_SERVER && channel->global_users &&
3371 chl->client->router && !silc_server_channel_has_global(channel))
3372 channel->global_users = FALSE;
3374 memset(chl, 'A', sizeof(*chl));
3377 /* Update statistics */
3378 if (SILC_IS_LOCAL(client))
3379 server->stat.my_chanclients--;
3380 if (server->server_type == SILC_ROUTER) {
3381 server->stat.cell_chanclients--;
3382 server->stat.chanclients--;
3385 /* If there is not at least one local user on the channel then we don't
3386 need the channel entry anymore, we can remove it safely, unless the
3387 channel is permanent channel */
3388 if (server->server_type == SILC_SERVER &&
3389 !silc_server_channel_has_local(channel)) {
3390 /* Notify about leaving client if this channel has global users. */
3391 if (notify && channel->global_users)
3392 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3393 SILC_NOTIFY_TYPE_SIGNOFF,
3394 signoff_message ? 2 : 1,
3395 clidp->data, silc_buffer_len(clidp),
3396 signoff_message, signoff_message ?
3397 strlen(signoff_message) : 0);
3399 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3400 silc_server_channel_delete(server, channel);
3404 /* Send notify to channel about client leaving SILC and channel too */
3406 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3407 SILC_NOTIFY_TYPE_SIGNOFF,
3408 signoff_message ? 2 : 1,
3409 clidp->data, silc_buffer_len(clidp),
3410 signoff_message, signoff_message ?
3411 strlen(signoff_message) : 0);
3413 if (killed && clidp) {
3414 /* Remove the client from channel's invite list */
3415 if (channel->invite_list &&
3416 silc_hash_table_count(channel->invite_list)) {
3418 SilcArgumentPayload iargs;
3419 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3420 silc_buffer_len(clidp), 3);
3421 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3422 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3423 silc_buffer_free(ab);
3424 silc_argument_payload_free(iargs);
3428 /* Don't create keys if we are shutting down */
3429 if (server->server_shutdown)
3432 /* Re-generate channel key if needed */
3433 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3434 if (!silc_server_create_channel_key(server, channel, 0))
3437 /* Send the channel key to the channel. The key of course is not sent
3438 to the client who was removed from the channel. */
3439 silc_server_send_channel_key(server, client->connection, channel,
3440 server->server_type == SILC_ROUTER ?
3441 FALSE : !server->standalone);
3445 silc_hash_table_list_reset(&htl);
3447 silc_buffer_free(clidp);
3450 /* Removes client from one channel. This is used for example when client
3451 calls LEAVE command to remove itself from the channel. Returns TRUE
3452 if channel still exists and FALSE if the channel is removed when
3453 last client leaves the channel. If `notify' is FALSE notify messages
3456 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3457 SilcPacketStream sock,
3458 SilcChannelEntry channel,
3459 SilcClientEntry client,
3462 SilcChannelClientEntry chl;
3465 SILC_LOG_DEBUG(("Removing %s from channel %s",
3466 silc_id_render(client->id, SILC_ID_CLIENT),
3467 channel->channel_name));
3469 /* Get the entry to the channel, if this client is not on the channel
3471 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3474 /* Remove channel if this is last client leaving the channel, unless
3475 the channel is permanent. */
3476 if (server->server_type != SILC_SERVER &&
3477 silc_hash_table_count(channel->user_list) < 2) {
3478 silc_server_channel_delete(server, channel);
3482 silc_hash_table_del(client->channels, channel);
3483 silc_hash_table_del(channel->user_list, client);
3484 channel->user_count--;
3486 /* If there is no global users on the channel anymore mark the channel
3487 as local channel. Do not check if the client is local client. */
3488 if (server->server_type == SILC_SERVER && channel->global_users &&
3489 chl->client->router && !silc_server_channel_has_global(channel))
3490 channel->global_users = FALSE;
3492 memset(chl, 'O', sizeof(*chl));
3495 /* Update statistics */
3496 if (SILC_IS_LOCAL(client))
3497 server->stat.my_chanclients--;
3498 if (server->server_type == SILC_ROUTER) {
3499 server->stat.cell_chanclients--;
3500 server->stat.chanclients--;
3503 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3507 /* If there is not at least one local user on the channel then we don't
3508 need the channel entry anymore, we can remove it safely, unless the
3509 channel is permanent channel */
3510 if (server->server_type == SILC_SERVER &&
3511 !silc_server_channel_has_local(channel)) {
3512 /* Notify about leaving client if this channel has global users. */
3513 if (notify && channel->global_users)
3514 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3515 SILC_NOTIFY_TYPE_LEAVE, 1,
3516 clidp->data, silc_buffer_len(clidp));
3518 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3519 silc_server_channel_delete(server, channel);
3520 silc_buffer_free(clidp);
3524 /* Send notify to channel about client leaving the channel */
3526 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3527 SILC_NOTIFY_TYPE_LEAVE, 1,
3528 clidp->data, silc_buffer_len(clidp));
3530 silc_buffer_free(clidp);
3534 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3535 function may be used only by router. In real SILC network all channels
3536 are created by routers thus this function is never used by normal
3539 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3540 SilcServerID *router_id,
3546 SilcChannelID *channel_id;
3547 SilcChannelEntry entry;
3548 SilcCipher send_key, receive_key;
3551 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3554 cipher = SILC_DEFAULT_CIPHER;
3556 hmac = SILC_DEFAULT_HMAC;
3558 /* Allocate cipher */
3559 if (!silc_cipher_alloc(cipher, &send_key))
3561 if (!silc_cipher_alloc(cipher, &receive_key)) {
3562 silc_cipher_free(send_key);
3567 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3568 silc_cipher_free(send_key);
3569 silc_cipher_free(receive_key);
3573 channel_name = strdup(channel_name);
3575 /* Create the channel ID */
3576 if (!silc_id_create_channel_id(server, router_id, server->rng,
3578 silc_free(channel_name);
3579 silc_cipher_free(send_key);
3580 silc_cipher_free(receive_key);
3581 silc_hmac_free(newhmac);
3585 /* Create the channel */
3586 entry = silc_idlist_add_channel(server->local_list, channel_name,
3587 SILC_CHANNEL_MODE_NONE, channel_id,
3588 NULL, send_key, receive_key, newhmac);
3590 silc_free(channel_name);
3591 silc_cipher_free(send_key);
3592 silc_cipher_free(receive_key);
3593 silc_hmac_free(newhmac);
3594 silc_free(channel_id);
3598 entry->cipher = strdup(cipher);
3599 entry->hmac_name = strdup(hmac);
3601 /* Now create the actual key material */
3602 if (!silc_server_create_channel_key(server, entry,
3603 silc_cipher_get_key_len(send_key) / 8)) {
3604 silc_idlist_del_channel(server->local_list, entry);
3608 /* Notify other routers about the new channel. We send the packet
3609 to our primary route. */
3611 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3612 channel_name, entry->id,
3613 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3616 /* Distribute to backup routers */
3617 if (broadcast && server->server_type == SILC_ROUTER) {
3619 unsigned char cid[32];
3620 SilcUInt32 name_len = strlen(channel_name);
3623 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3624 packet = silc_channel_payload_encode(channel_name, name_len,
3625 cid, id_len, entry->mode);
3626 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3627 packet->data, silc_buffer_len(packet), FALSE,
3629 silc_buffer_free(packet);
3632 server->stat.my_channels++;
3633 if (server->server_type == SILC_ROUTER) {
3634 server->stat.channels++;
3635 server->stat.cell_channels++;
3636 entry->users_resolved = TRUE;
3642 /* Same as above but creates the channel with Channel ID `channel_id. */
3645 silc_server_create_new_channel_with_id(SilcServer server,
3649 SilcChannelID *channel_id,
3652 SilcChannelEntry entry;
3653 SilcCipher send_key, receive_key;
3656 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3659 cipher = SILC_DEFAULT_CIPHER;
3661 hmac = SILC_DEFAULT_HMAC;
3663 /* Allocate cipher */
3664 if (!silc_cipher_alloc(cipher, &send_key))
3666 if (!silc_cipher_alloc(cipher, &receive_key)) {
3667 silc_cipher_free(send_key);
3672 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3673 silc_cipher_free(send_key);
3674 silc_cipher_free(receive_key);
3678 channel_name = strdup(channel_name);
3680 /* Create the channel */
3681 entry = silc_idlist_add_channel(server->local_list, channel_name,
3682 SILC_CHANNEL_MODE_NONE, channel_id,
3683 NULL, send_key, receive_key, newhmac);
3685 silc_cipher_free(send_key);
3686 silc_cipher_free(receive_key);
3687 silc_hmac_free(newhmac);
3688 silc_free(channel_name);
3692 /* Now create the actual key material */
3693 if (!silc_server_create_channel_key(server, entry,
3694 silc_cipher_get_key_len(send_key) / 8)) {
3695 silc_idlist_del_channel(server->local_list, entry);
3699 /* Notify other routers about the new channel. We send the packet
3700 to our primary route. */
3702 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3703 channel_name, entry->id,
3704 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3707 /* Distribute to backup routers */
3708 if (broadcast && server->server_type == SILC_ROUTER) {
3710 unsigned char cid[32];
3711 SilcUInt32 name_len = strlen(channel_name);
3714 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3715 packet = silc_channel_payload_encode(channel_name, name_len,
3716 cid, id_len, entry->mode);
3717 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3718 packet->data, silc_buffer_len(packet), FALSE,
3720 silc_buffer_free(packet);
3723 server->stat.my_channels++;
3724 if (server->server_type == SILC_ROUTER) {
3725 server->stat.channels++;
3726 server->stat.cell_channels++;
3727 entry->users_resolved = TRUE;
3733 /* Channel's key re-key timeout callback. */
3735 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3737 SilcServer server = app_context;
3738 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3742 /* Return now if we are shutting down */
3743 if (server->server_shutdown)
3746 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3749 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3752 /* Generates new channel key. This is used to create the initial channel key
3753 but also to re-generate new key for channel. If `key_len' is provided
3754 it is the bytes of the key length. */
3756 SilcBool silc_server_create_channel_key(SilcServer server,
3757 SilcChannelEntry channel,
3761 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3764 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3765 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3769 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3771 if (!channel->send_key)
3772 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3773 channel->send_key = NULL;
3776 if (!channel->receive_key)
3777 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3778 silc_cipher_free(channel->send_key);
3779 channel->send_key = channel->receive_key = NULL;
3785 else if (channel->key_len)
3786 len = channel->key_len / 8;
3788 len = silc_cipher_get_key_len(channel->send_key) / 8;
3790 /* Create channel key */
3791 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3794 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3795 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3797 /* Remove old key if exists */
3799 memset(channel->key, 0, channel->key_len / 8);
3800 silc_free(channel->key);
3804 channel->key_len = len * 8;
3805 channel->key = silc_memdup(channel_key, len);
3806 memset(channel_key, 0, sizeof(channel_key));
3808 /* Generate HMAC key from the channel key data and set it */
3810 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3811 memset(channel->key, 0, channel->key_len / 8);
3812 silc_free(channel->key);
3813 silc_cipher_free(channel->send_key);
3814 silc_cipher_free(channel->receive_key);
3815 channel->send_key = channel->receive_key = NULL;
3818 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3819 silc_hmac_set_key(channel->hmac, hash,
3820 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3821 memset(hash, 0, sizeof(hash));
3823 if (server->server_type == SILC_ROUTER) {
3824 if (!channel->rekey)
3825 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3826 channel->rekey->channel = channel;
3827 channel->rekey->key_len = key_len;
3828 if (channel->rekey->task)
3829 silc_schedule_task_del(server->schedule, channel->rekey->task);
3831 channel->rekey->task =
3832 silc_schedule_task_add_timeout(server->schedule,
3833 silc_server_channel_key_rekey,
3834 (void *)channel->rekey,
3835 server->config->channel_rekey_secs, 0);
3841 /* Saves the channel key found in the encoded `key_payload' buffer. This
3842 function is used when we receive Channel Key Payload and also when we're
3843 processing JOIN command reply. Returns entry to the channel. */
3845 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3846 SilcBuffer key_payload,
3847 SilcChannelEntry channel)
3849 SilcChannelKeyPayload payload = NULL;
3851 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3855 /* Decode channel key payload */
3856 payload = silc_channel_key_payload_parse(key_payload->data,
3857 silc_buffer_len(key_payload));
3859 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3864 /* Get the channel entry */
3867 /* Get channel ID */
3868 tmp = silc_channel_key_get_id(payload, &tmp_len);
3869 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3874 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3876 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3878 if (server->server_type == SILC_ROUTER)
3879 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3880 silc_id_render(&id, SILC_ID_CHANNEL)));
3886 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3888 tmp = silc_channel_key_get_key(payload, &tmp_len);
3894 cipher = silc_channel_key_get_cipher(payload, NULL);
3900 /* Remove old key if exists */
3902 memset(channel->key, 0, channel->key_len / 8);
3903 silc_free(channel->key);
3904 silc_cipher_free(channel->send_key);
3905 silc_cipher_free(channel->receive_key);
3908 /* Create new cipher */
3909 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3910 channel->send_key = NULL;
3914 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3915 silc_cipher_free(channel->send_key);
3916 channel->send_key = channel->receive_key = NULL;
3921 if (channel->cipher)
3922 silc_free(channel->cipher);
3923 channel->cipher = strdup(cipher);
3926 channel->key_len = tmp_len * 8;
3927 channel->key = silc_memdup(tmp, tmp_len);
3928 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3929 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3931 /* Generate HMAC key from the channel key data and set it */
3933 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3934 memset(channel->key, 0, channel->key_len / 8);
3935 silc_free(channel->key);
3936 silc_cipher_free(channel->send_key);
3937 silc_cipher_free(channel->receive_key);
3938 channel->send_key = channel->receive_key = NULL;
3941 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3942 silc_hmac_set_key(channel->hmac, hash,
3943 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3945 memset(hash, 0, sizeof(hash));
3946 memset(tmp, 0, tmp_len);
3948 if (server->server_type == SILC_ROUTER) {
3949 if (!channel->rekey)
3950 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3951 channel->rekey->channel = channel;
3952 if (channel->rekey->task)
3953 silc_schedule_task_del(server->schedule, channel->rekey->task);
3955 channel->rekey->task =
3956 silc_schedule_task_add_timeout(server->schedule,
3957 silc_server_channel_key_rekey,
3958 (void *)channel->rekey,
3959 server->config->channel_rekey_secs, 0);
3964 silc_channel_key_payload_free(payload);
3969 /* Returns assembled of all servers in the given ID list. The packet's
3970 form is dictated by the New ID payload. */
3972 static void silc_server_announce_get_servers(SilcServer server,
3973 SilcServerEntry remote,
3975 SilcBuffer *servers,
3976 unsigned long creation_time)
3979 SilcIDCacheEntry id_cache;
3980 SilcServerEntry entry;
3984 /* Go through all clients in the list */
3985 if (silc_idcache_get_all(id_list->servers, &list)) {
3986 silc_list_start(list);
3987 while ((id_cache = silc_list_get(list))) {
3988 entry = (SilcServerEntry)id_cache->context;
3990 /* Do not announce the one we've sending our announcements and
3991 do not announce ourself. Also check the creation time if it's
3993 if ((entry == remote) || (entry == server->id_entry) ||
3994 (creation_time && entry->data.created < creation_time))
3997 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3999 tmp = silc_buffer_realloc(*servers,
4001 silc_buffer_truelen((*servers)) +
4002 silc_buffer_len(idp) :
4003 silc_buffer_len(idp)));
4007 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
4008 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
4009 silc_buffer_pull(*servers, silc_buffer_len(idp));
4010 silc_buffer_free(idp);
4016 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
4022 p = silc_notify_payload_encode(notify, argc, ap);
4028 /* This function is used by router to announce existing servers to our
4029 primary router when we've connected to it. If `creation_time' is non-zero
4030 then only the servers that has been created after the `creation_time'
4031 will be announced. */
4033 void silc_server_announce_servers(SilcServer server, SilcBool global,
4034 unsigned long creation_time,
4035 SilcPacketStream remote)
4037 SilcBuffer servers = NULL;
4039 SILC_LOG_DEBUG(("Announcing servers"));
4041 /* Get servers in local list */
4042 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4043 server->local_list, &servers,
4047 /* Get servers in global list */
4048 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4049 server->global_list, &servers,
4053 silc_buffer_push(servers, servers->data - servers->head);
4054 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4056 /* Send the packet */
4057 silc_server_packet_send(server, remote,
4058 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4059 servers->data, silc_buffer_len(servers));
4061 silc_buffer_free(servers);
4065 /* Returns assembled packet of all clients in the given ID list. The
4066 packet's form is dictated by the New ID Payload. */
4068 static void silc_server_announce_get_clients(SilcServer server,
4070 SilcBuffer *clients,
4072 unsigned long creation_time)
4075 SilcIDCacheEntry id_cache;
4076 SilcClientEntry client;
4079 unsigned char mode[4];
4082 /* Go through all clients in the list */
4083 if (silc_idcache_get_all(id_list->clients, &list)) {
4084 silc_list_start(list);
4085 while ((id_cache = silc_list_get(list))) {
4086 client = (SilcClientEntry)id_cache->context;
4088 if (creation_time && client->data.created < creation_time)
4090 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4092 if (!client->connection && !client->router)
4095 SILC_LOG_DEBUG(("Announce Client ID %s",
4096 silc_id_render(client->id, SILC_ID_CLIENT)));
4098 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4102 tmp2 = silc_buffer_realloc(*clients,
4104 silc_buffer_truelen((*clients)) +
4105 silc_buffer_len(idp) :
4106 silc_buffer_len(idp)));
4110 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4111 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4112 silc_buffer_pull(*clients, silc_buffer_len(idp));
4114 SILC_PUT32_MSB(client->mode, mode);
4116 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4117 2, idp->data, silc_buffer_len(idp),
4119 tmp2 = silc_buffer_realloc(*umodes,
4121 silc_buffer_truelen((*umodes)) +
4122 silc_buffer_len(tmp) :
4123 silc_buffer_len(tmp)));
4127 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4128 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4129 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4130 silc_buffer_free(tmp);
4132 silc_buffer_free(idp);
4137 /* This function is used to announce our existing clients to our router
4138 when we've connected to it. If `creation_time' is non-zero then only
4139 the clients that has been created after the `creation_time' will be
4142 void silc_server_announce_clients(SilcServer server,
4143 unsigned long creation_time,
4144 SilcPacketStream remote)
4146 SilcBuffer clients = NULL;
4147 SilcBuffer umodes = NULL;
4149 SILC_LOG_DEBUG(("Announcing clients"));
4151 /* Get clients in local list */
4152 silc_server_announce_get_clients(server, server->local_list,
4153 &clients, &umodes, creation_time);
4155 /* As router we announce our global list as well */
4156 if (server->server_type == SILC_ROUTER)
4157 silc_server_announce_get_clients(server, server->global_list,
4158 &clients, &umodes, creation_time);
4161 silc_buffer_push(clients, clients->data - clients->head);
4162 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4164 /* Send the packet */
4165 silc_server_packet_send(server, remote,
4166 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4167 clients->data, silc_buffer_len(clients));
4169 silc_buffer_free(clients);
4173 silc_buffer_push(umodes, umodes->data - umodes->head);
4174 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4176 /* Send the packet */
4177 silc_server_packet_send(server, remote,
4178 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4179 umodes->data, silc_buffer_len(umodes));
4181 silc_buffer_free(umodes);
4185 /* Returns channel's topic for announcing it */
4187 void silc_server_announce_get_channel_topic(SilcServer server,
4188 SilcChannelEntry channel,
4193 if (channel->topic) {
4194 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4195 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4197 silc_buffer_len(chidp),
4199 strlen(channel->topic));
4200 silc_buffer_free(chidp);
4204 /* Returns channel's invite and ban lists */
4206 void silc_server_announce_get_inviteban(SilcServer server,
4207 SilcChannelEntry channel,
4211 SilcBuffer list, idp, idp2, tmp2;
4214 SilcHashTableList htl;
4215 const unsigned char a[1] = { 0x03 };
4217 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4219 /* Encode invite list */
4220 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4221 list = silc_buffer_alloc_size(2);
4222 type = silc_hash_table_count(channel->invite_list);
4223 SILC_PUT16_MSB(type, list->data);
4224 silc_hash_table_list(channel->invite_list, &htl);
4225 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4226 list = silc_argument_payload_encode_one(list, tmp2->data,
4227 silc_buffer_len(tmp2),
4228 SILC_PTR_TO_32(ptype));
4229 silc_hash_table_list_reset(&htl);
4231 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4233 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4234 idp->data, silc_buffer_len(idp),
4235 channel->channel_name,
4236 strlen(channel->channel_name),
4237 idp2->data, silc_buffer_len(idp2),
4239 list->data, silc_buffer_len(list));
4240 silc_buffer_free(idp2);
4241 silc_buffer_free(list);
4244 /* Encode ban list */
4245 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4246 list = silc_buffer_alloc_size(2);
4247 type = silc_hash_table_count(channel->ban_list);
4248 SILC_PUT16_MSB(type, list->data);
4249 silc_hash_table_list(channel->ban_list, &htl);
4250 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4251 list = silc_argument_payload_encode_one(list, tmp2->data,
4252 silc_buffer_len(tmp2),
4253 SILC_PTR_TO_32(ptype));
4254 silc_hash_table_list_reset(&htl);
4257 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4258 idp->data, silc_buffer_len(idp),
4260 list->data, silc_buffer_len(list));
4261 silc_buffer_free(list);
4264 silc_buffer_free(idp);
4267 /* Returns assembled packets for channel users of the `channel'. */
4269 void silc_server_announce_get_channel_users(SilcServer server,
4270 SilcChannelEntry channel,
4271 SilcBuffer *channel_modes,
4272 SilcBuffer *channel_users,
4273 SilcBuffer *channel_users_modes)
4275 SilcChannelClientEntry chl;
4276 SilcHashTableList htl;
4277 SilcBuffer chidp, clidp, csidp;
4278 SilcBuffer tmp, fkey = NULL, chpklist;
4280 unsigned char mode[4], ulimit[4];
4284 SILC_LOG_DEBUG(("Start"));
4286 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4287 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4288 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4291 SILC_PUT32_MSB(channel->mode, mode);
4292 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4293 SILC_PUT32_MSB(channel->user_limit, ulimit);
4294 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4295 if (channel->founder_key)
4296 fkey = silc_public_key_payload_encode(channel->founder_key);
4298 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4300 silc_buffer_len(csidp),
4303 hmac, hmac ? strlen(hmac) : 0,
4304 channel->passphrase,
4305 channel->passphrase ?
4306 strlen(channel->passphrase) : 0,
4307 fkey ? fkey->data : NULL,
4308 fkey ? silc_buffer_len(fkey) : 0,
4309 chpklist ? chpklist->data : NULL,
4311 silc_buffer_len(chpklist) : 0,
4313 SILC_CHANNEL_MODE_ULIMIT ?
4316 SILC_CHANNEL_MODE_ULIMIT ?
4317 sizeof(ulimit) : 0));
4318 len = silc_buffer_len(tmp);
4320 silc_buffer_realloc(*channel_modes,
4322 silc_buffer_truelen((*channel_modes)) + len : len));
4325 *channel_modes = tmp2;
4326 silc_buffer_pull_tail(*channel_modes,
4327 ((*channel_modes)->end -
4328 (*channel_modes)->data));
4329 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4330 silc_buffer_pull(*channel_modes, len);
4331 silc_buffer_free(tmp);
4332 silc_buffer_free(fkey);
4335 /* Now find all users on the channel */
4336 silc_hash_table_list(channel->user_list, &htl);
4337 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4338 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4340 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4344 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4346 silc_buffer_len(clidp),
4348 silc_buffer_len(chidp));
4349 len = silc_buffer_len(tmp);
4351 silc_buffer_realloc(*channel_users,
4353 silc_buffer_truelen((*channel_users)) + len : len));
4356 *channel_users = tmp2;
4357 silc_buffer_pull_tail(*channel_users,
4358 ((*channel_users)->end -
4359 (*channel_users)->data));
4361 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4362 silc_buffer_pull(*channel_users, len);
4363 silc_buffer_free(tmp);
4365 /* CUMODE notify for mode change on the channel */
4366 SILC_PUT32_MSB(chl->mode, mode);
4367 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4368 fkey = silc_public_key_payload_encode(channel->founder_key);
4369 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4371 silc_buffer_len(csidp),
4374 silc_buffer_len(clidp),
4375 fkey ? fkey->data : NULL,
4376 fkey ? silc_buffer_len(fkey) : 0);
4377 len = silc_buffer_len(tmp);
4379 silc_buffer_realloc(*channel_users_modes,
4380 (*channel_users_modes ?
4381 silc_buffer_truelen((*channel_users_modes)) +
4385 *channel_users_modes = tmp2;
4386 silc_buffer_pull_tail(*channel_users_modes,
4387 ((*channel_users_modes)->end -
4388 (*channel_users_modes)->data));
4390 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4391 silc_buffer_pull(*channel_users_modes, len);
4392 silc_buffer_free(tmp);
4393 silc_buffer_free(fkey);
4395 silc_buffer_free(clidp);
4397 silc_hash_table_list_reset(&htl);
4398 silc_buffer_free(chidp);
4399 silc_buffer_free(csidp);
4402 /* Returns assembled packets for all channels and users on those channels
4403 from the given ID List. The packets are in the form dictated by the
4404 New Channel and New Channel User payloads. */
4406 void silc_server_announce_get_channels(SilcServer server,
4408 SilcBuffer *channels,
4409 SilcBuffer **channel_modes,
4410 SilcBuffer *channel_users,
4411 SilcBuffer **channel_users_modes,
4412 SilcUInt32 *channel_users_modes_c,
4413 SilcBuffer **channel_topics,
4414 SilcBuffer **channel_invites,
4415 SilcBuffer **channel_bans,
4416 SilcChannelID ***channel_ids,
4417 unsigned long creation_time)
4420 SilcIDCacheEntry id_cache;
4421 SilcChannelEntry channel;
4422 unsigned char cid[32];
4424 SilcUInt16 name_len;
4426 int i = *channel_users_modes_c;
4430 SILC_LOG_DEBUG(("Start"));
4432 /* Go through all channels in the list */
4433 if (silc_idcache_get_all(id_list->channels, &list)) {
4434 silc_list_start(list);
4435 while ((id_cache = silc_list_get(list))) {
4436 channel = (SilcChannelEntry)id_cache->context;
4438 if (creation_time && channel->created < creation_time)
4443 SILC_LOG_DEBUG(("Announce Channel ID %s",
4444 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4446 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4447 name_len = strlen(channel->channel_name);
4450 len = 4 + name_len + id_len + 4;
4452 silc_buffer_realloc(*channels,
4454 silc_buffer_truelen((*channels)) +
4460 silc_buffer_pull_tail(*channels,
4461 ((*channels)->end - (*channels)->data));
4462 silc_buffer_format(*channels,
4463 SILC_STR_UI_SHORT(name_len),
4464 SILC_STR_UI_XNSTRING(channel->channel_name,
4466 SILC_STR_UI_SHORT(id_len),
4467 SILC_STR_UI_XNSTRING(cid, id_len),
4468 SILC_STR_UI_INT(channel->mode),
4470 silc_buffer_pull(*channels, len);
4473 if (creation_time && channel->updated < creation_time)
4479 /* Channel user modes */
4480 tmp = silc_realloc(*channel_users_modes,
4481 sizeof(**channel_users_modes) * (i + 1));
4484 *channel_users_modes = tmp;
4485 (*channel_users_modes)[i] = NULL;
4486 tmp = silc_realloc(*channel_modes,
4487 sizeof(**channel_modes) * (i + 1));
4490 *channel_modes = tmp;
4491 (*channel_modes)[i] = NULL;
4492 tmp = silc_realloc(*channel_ids,
4493 sizeof(**channel_ids) * (i + 1));
4497 (*channel_ids)[i] = NULL;
4498 silc_server_announce_get_channel_users(server, channel,
4499 &(*channel_modes)[i],
4501 &(*channel_users_modes)[i]);
4502 (*channel_ids)[i] = channel->id;
4504 /* Channel's topic */
4505 tmp = silc_realloc(*channel_topics,
4506 sizeof(**channel_topics) * (i + 1));
4509 *channel_topics = tmp;
4510 (*channel_topics)[i] = NULL;
4511 silc_server_announce_get_channel_topic(server, channel,
4512 &(*channel_topics)[i]);
4514 /* Channel's invite and ban list */
4515 tmp = silc_realloc(*channel_invites,
4516 sizeof(**channel_invites) * (i + 1));
4519 *channel_invites = tmp;
4520 (*channel_invites)[i] = NULL;
4521 tmp = silc_realloc(*channel_bans,
4522 sizeof(**channel_bans) * (i + 1));
4525 *channel_bans = tmp;
4526 (*channel_bans)[i] = NULL;
4527 silc_server_announce_get_inviteban(server, channel,
4528 &(*channel_invites)[i],
4529 &(*channel_bans)[i]);
4531 (*channel_users_modes_c)++;
4539 /* This function is used to announce our existing channels to our router
4540 when we've connected to it. This also announces the users on the
4541 channels to the router. If the `creation_time' is non-zero only the
4542 channels that was created after the `creation_time' are announced.
4543 Note that the channel users are still announced even if the `creation_time'
4546 void silc_server_announce_channels(SilcServer server,
4547 unsigned long creation_time,
4548 SilcPacketStream remote)
4550 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4551 SilcBuffer *channel_users_modes = NULL;
4552 SilcBuffer *channel_topics = NULL;
4553 SilcBuffer *channel_invites = NULL;
4554 SilcBuffer *channel_bans = NULL;
4555 SilcUInt32 channel_users_modes_c = 0;
4556 SilcChannelID **channel_ids = NULL;
4558 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4560 /* Get channels and channel users in local list */
4561 silc_server_announce_get_channels(server, server->local_list,
4562 &channels, &channel_modes,
4564 &channel_users_modes,
4565 &channel_users_modes_c,
4569 &channel_ids, creation_time);
4571 /* Get channels and channel users in global list */
4572 if (server->server_type != SILC_SERVER)
4573 silc_server_announce_get_channels(server, server->global_list,
4574 &channels, &channel_modes,
4576 &channel_users_modes,
4577 &channel_users_modes_c,
4581 &channel_ids, creation_time);
4584 silc_buffer_push(channels, channels->data - channels->head);
4585 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4587 /* Send the packet */
4588 silc_server_packet_send(server, remote,
4589 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4590 channels->data, silc_buffer_len(channels));
4592 silc_buffer_free(channels);
4595 if (channel_users) {
4596 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4597 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4598 silc_buffer_len(channel_users));
4600 /* Send the packet */
4601 silc_server_packet_send(server, remote,
4602 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4603 channel_users->data, silc_buffer_len(channel_users));
4605 silc_buffer_free(channel_users);
4608 if (channel_modes) {
4611 for (i = 0; i < channel_users_modes_c; i++) {
4612 if (!channel_modes[i])
4614 silc_buffer_push(channel_modes[i],
4615 channel_modes[i]->data -
4616 channel_modes[i]->head);
4617 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4618 silc_buffer_len(channel_modes[i]));
4619 silc_server_packet_send_dest(server, remote,
4620 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4621 channel_ids[i], SILC_ID_CHANNEL,
4622 channel_modes[i]->data,
4623 silc_buffer_len(channel_modes[i]));
4624 silc_buffer_free(channel_modes[i]);
4626 silc_free(channel_modes);
4629 if (channel_users_modes) {
4632 for (i = 0; i < channel_users_modes_c; i++) {
4633 if (!channel_users_modes[i])
4635 silc_buffer_push(channel_users_modes[i],
4636 channel_users_modes[i]->data -
4637 channel_users_modes[i]->head);
4638 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4639 silc_buffer_len(channel_users_modes[i]));
4640 silc_server_packet_send_dest(server, remote,
4641 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4642 channel_ids[i], SILC_ID_CHANNEL,
4643 channel_users_modes[i]->data,
4644 silc_buffer_len(channel_users_modes[i]));
4645 silc_buffer_free(channel_users_modes[i]);
4647 silc_free(channel_users_modes);
4650 if (channel_topics) {
4653 for (i = 0; i < channel_users_modes_c; i++) {
4654 if (!channel_topics[i])
4657 silc_buffer_push(channel_topics[i],
4658 channel_topics[i]->data -
4659 channel_topics[i]->head);
4660 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4661 silc_buffer_len(channel_topics[i]));
4662 silc_server_packet_send_dest(server, remote,
4663 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4664 channel_ids[i], SILC_ID_CHANNEL,
4665 channel_topics[i]->data,
4666 silc_buffer_len(channel_topics[i]));
4667 silc_buffer_free(channel_topics[i]);
4669 silc_free(channel_topics);
4672 if (channel_invites) {
4675 for (i = 0; i < channel_users_modes_c; i++) {
4676 if (!channel_invites[i])
4679 silc_buffer_push(channel_invites[i],
4680 channel_invites[i]->data -
4681 channel_invites[i]->head);
4682 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4683 silc_buffer_len(channel_invites[i]));
4684 silc_server_packet_send_dest(server, remote,
4685 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4686 channel_ids[i], SILC_ID_CHANNEL,
4687 channel_invites[i]->data,
4688 silc_buffer_len(channel_invites[i]));
4689 silc_buffer_free(channel_invites[i]);
4691 silc_free(channel_invites);
4697 for (i = 0; i < channel_users_modes_c; i++) {
4698 if (!channel_bans[i])
4701 silc_buffer_push(channel_bans[i],
4702 channel_bans[i]->data -
4703 channel_bans[i]->head);
4704 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4705 silc_buffer_len(channel_bans[i]));
4706 silc_server_packet_send_dest(server, remote,
4707 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4708 channel_ids[i], SILC_ID_CHANNEL,
4709 channel_bans[i]->data,
4710 silc_buffer_len(channel_bans[i]));
4711 silc_buffer_free(channel_bans[i]);
4713 silc_free(channel_bans);
4716 silc_free(channel_ids);
4719 /* Announces WATCH list. */
4721 void silc_server_announce_watches(SilcServer server,
4722 SilcPacketStream remote)
4724 SilcHashTableList htl;
4725 SilcBuffer buffer, idp, args, pkp;
4726 SilcClientEntry client;
4729 SILC_LOG_DEBUG(("Announcing watch list"));
4731 /* XXX because way we save the nicks (hash) we cannot announce them. */
4733 /* XXX we should send all public keys in one command if client is
4734 watching more than one key */
4735 silc_hash_table_list(server->watcher_list_pk, &htl);
4736 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4737 if (!client || !client->id)
4740 server->stat.commands_sent++;
4742 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4743 args = silc_buffer_alloc_size(2);
4744 silc_buffer_format(args,
4745 SILC_STR_UI_SHORT(1),
4747 pkp = silc_public_key_payload_encode(key);
4748 args = silc_argument_payload_encode_one(args, pkp->data,
4749 silc_buffer_len(pkp), 0x00);
4750 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4751 ++server->cmd_ident, 2,
4752 1, idp->data, silc_buffer_len(idp),
4754 silc_buffer_len(args));
4757 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4758 buffer->data, silc_buffer_len(buffer));
4760 silc_buffer_free(pkp);
4761 silc_buffer_free(args);
4762 silc_buffer_free(idp);
4763 silc_buffer_free(buffer);
4765 silc_hash_table_list_reset(&htl);
4768 /* Assembles user list and users mode list from the `channel'. */
4770 SilcBool silc_server_get_users_on_channel(SilcServer server,
4771 SilcChannelEntry channel,
4772 SilcBuffer *user_list,
4773 SilcBuffer *mode_list,
4774 SilcUInt32 *user_count)
4776 SilcChannelClientEntry chl;
4777 SilcHashTableList htl;
4778 SilcBuffer client_id_list;
4779 SilcBuffer client_mode_list;
4781 SilcUInt32 list_count = 0, len = 0;
4783 if (!silc_hash_table_count(channel->user_list))
4786 silc_hash_table_list(channel->user_list, &htl);
4787 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4788 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4789 silc_hash_table_list_reset(&htl);
4791 client_id_list = silc_buffer_alloc(len);
4793 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4794 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4795 silc_buffer_pull_tail(client_mode_list,
4796 silc_buffer_truelen(client_mode_list));
4798 silc_hash_table_list(channel->user_list, &htl);
4799 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4801 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4802 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4803 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4804 silc_buffer_free(idp);
4806 /* Client's mode on channel */
4807 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4808 silc_buffer_pull(client_mode_list, 4);
4812 silc_hash_table_list_reset(&htl);
4813 silc_buffer_push(client_id_list,
4814 client_id_list->data - client_id_list->head);
4815 silc_buffer_push(client_mode_list,
4816 client_mode_list->data - client_mode_list->head);
4818 *user_list = client_id_list;
4819 *mode_list = client_mode_list;
4820 *user_count = list_count;
4824 /* Saves users and their modes to the `channel'. */
4826 void silc_server_save_users_on_channel(SilcServer server,
4827 SilcPacketStream sock,
4828 SilcChannelEntry channel,
4829 SilcClientID *noadd,
4830 SilcBuffer user_list,
4831 SilcBuffer mode_list,
4832 SilcUInt32 user_count)
4838 SilcClientEntry client;
4839 SilcIDCacheEntry cache;
4840 SilcChannelClientEntry chl;
4842 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4843 channel->channel_name));
4845 for (i = 0; i < user_count; i++) {
4847 SILC_GET16_MSB(idp_len, user_list->data + 2);
4849 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4851 silc_buffer_pull(user_list, idp_len);
4854 SILC_GET32_MSB(mode, mode_list->data);
4855 silc_buffer_pull(mode_list, 4);
4857 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4862 /* Check if we have this client cached already. */
4863 client = silc_idlist_find_client_by_id(server->local_list,
4865 server->server_type, &cache);
4867 client = silc_idlist_find_client_by_id(server->global_list,
4869 server->server_type, &cache);
4871 /* If router did not find such Client ID in its lists then this must
4872 be bogus client or some router in the net is buggy. */
4873 if (server->server_type != SILC_SERVER)
4876 /* We don't have that client anywhere, add it. The client is added
4877 to global list since server didn't have it in the lists so it must be
4879 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4880 silc_id_dup(&id.u.client_id,
4882 silc_packet_get_context(sock),
4885 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4889 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4892 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4893 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4894 "%s", channel->channel_name));
4898 if (!silc_server_client_on_channel(client, channel, &chl)) {
4899 /* Client was not on the channel, add it. */
4900 chl = silc_calloc(1, sizeof(*chl));
4901 chl->client = client;
4903 chl->channel = channel;
4904 silc_hash_table_add(channel->user_list, chl->client, chl);
4905 silc_hash_table_add(client->channels, chl->channel, chl);
4906 channel->user_count++;
4914 /* Saves channels and channels user modes to the `client'. Removes
4915 the client from those channels that are not sent in the list but
4918 void silc_server_save_user_channels(SilcServer server,
4919 SilcPacketStream sock,
4920 SilcClientEntry client,
4921 SilcBuffer channels,
4922 SilcBuffer channels_user_modes)
4925 SilcUInt32 *chumodes;
4926 SilcChannelPayload entry;
4927 SilcChannelEntry channel;
4928 SilcChannelID channel_id;
4929 SilcChannelClientEntry chl;
4930 SilcHashTable ht = NULL;
4931 SilcHashTableList htl;
4935 if (!channels || !channels_user_modes ||
4936 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4939 ch = silc_channel_payload_parse_list(channels->data,
4940 silc_buffer_len(channels));
4941 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4943 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4944 NULL, NULL, NULL, TRUE);
4945 silc_dlist_start(ch);
4946 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4947 /* Check if we have this channel, and add it if we don't have it.
4948 Also add the client on the channel unless it is there already. */
4949 if (!silc_channel_get_id_parse(entry, &channel_id))
4951 channel = silc_idlist_find_channel_by_id(server->local_list,
4954 channel = silc_idlist_find_channel_by_id(server->global_list,
4957 if (server->server_type != SILC_SERVER) {
4962 /* We don't have that channel anywhere, add it. */
4963 name = silc_channel_get_name(entry, NULL);
4964 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4965 silc_id_dup(&channel_id,
4967 server->router, NULL, NULL, 0);
4974 channel->mode = silc_channel_get_mode(entry);
4976 /* Add the client on the channel */
4977 if (!silc_server_client_on_channel(client, channel, &chl)) {
4978 chl = silc_calloc(1, sizeof(*chl));
4979 chl->client = client;
4980 chl->mode = chumodes[i++];
4981 chl->channel = channel;
4982 silc_hash_table_add(channel->user_list, chl->client, chl);
4983 silc_hash_table_add(client->channels, chl->channel, chl);
4984 channel->user_count++;
4987 chl->mode = chumodes[i++];
4990 silc_hash_table_add(ht, channel, channel);
4992 silc_channel_payload_list_free(ch);
4993 silc_free(chumodes);
4997 /* Go through the list again and remove client from channels that
4998 are no part of the list. */
5000 silc_hash_table_list(client->channels, &htl);
5001 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5002 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
5003 silc_hash_table_del(chl->channel->user_list, chl->client);
5004 silc_hash_table_del(chl->client->channels, chl->channel);
5008 silc_hash_table_list_reset(&htl);
5009 silc_hash_table_free(ht);
5011 silc_hash_table_list(client->channels, &htl);
5012 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5013 silc_hash_table_del(chl->channel->user_list, chl->client);
5014 silc_hash_table_del(chl->client->channels, chl->channel);
5017 silc_hash_table_list_reset(&htl);
5021 /* Lookups route to the client indicated by the `id_data'. The connection
5022 object and internal data object is returned. Returns NULL if route
5023 could not be found to the client. If the `client_id' is specified then
5024 it is used and the `id_data' is ignored. */
5027 silc_server_get_client_route(SilcServer server,
5028 unsigned char *id_data,
5030 SilcClientID *client_id,
5031 SilcIDListData *idata,
5032 SilcClientEntry *client_entry)
5034 SilcClientID *id, clid;
5035 SilcClientEntry client;
5037 SILC_LOG_DEBUG(("Start"));
5040 *client_entry = NULL;
5042 /* Decode destination Client ID */
5044 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
5046 id = silc_id_dup(&clid, SILC_ID_CLIENT);
5048 id = silc_id_dup(client_id, SILC_ID_CLIENT);
5051 /* If the destination belongs to our server we don't have to route
5052 the packet anywhere but to send it to the local destination. */
5053 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
5057 /* If we are router and the client has router then the client is in
5058 our cell but not directly connected to us. */
5059 if (server->server_type == SILC_ROUTER && client->router) {
5060 /* We are of course in this case the client's router thus the route
5061 to the client is the server who owns the client. So, we will send
5062 the packet to that server. */
5064 *idata = (SilcIDListData)client->router;
5065 return client->router->connection;
5068 /* Seems that client really is directly connected to us */
5070 *idata = (SilcIDListData)client;
5072 *client_entry = client;
5073 return client->connection;
5076 /* Destination belongs to someone not in this server. If we are normal
5077 server our action is to send the packet to our router. */
5078 if (server->server_type != SILC_ROUTER && !server->standalone) {
5081 *idata = (SilcIDListData)server->router;
5082 return SILC_PRIMARY_ROUTE(server);
5085 /* We are router and we will perform route lookup for the destination
5086 and send the packet to fastest route. */
5087 if (server->server_type == SILC_ROUTER && !server->standalone) {
5088 /* Check first that the ID is valid */
5089 client = silc_idlist_find_client_by_id(server->global_list, id,
5092 SilcPacketStream dst_sock;
5094 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5097 if (idata && dst_sock)
5098 *idata = silc_packet_get_context(dst_sock);
5107 /* Encodes and returns channel list of channels the `client' has joined.
5108 Secret channels are not put to the list. */
5110 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5111 SilcClientEntry client,
5112 SilcBool get_private,
5113 SilcBool get_secret,
5114 SilcBuffer *user_mode_list)
5116 SilcBuffer buffer = NULL;
5117 SilcChannelEntry channel;
5118 SilcChannelClientEntry chl;
5119 SilcHashTableList htl;
5120 unsigned char cid[32];
5122 SilcUInt16 name_len;
5126 *user_mode_list = NULL;
5128 silc_hash_table_list(client->channels, &htl);
5129 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5130 channel = chl->channel;
5132 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5134 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5137 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5138 name_len = strlen(channel->channel_name);
5140 len = 4 + name_len + id_len + 4;
5141 buffer = silc_buffer_realloc(buffer,
5143 silc_buffer_truelen(buffer) + len : len));
5144 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5145 silc_buffer_format(buffer,
5146 SILC_STR_UI_SHORT(name_len),
5147 SILC_STR_DATA(channel->channel_name, name_len),
5148 SILC_STR_UI_SHORT(id_len),
5149 SILC_STR_DATA(cid, id_len),
5150 SILC_STR_UI_INT(chl->channel->mode),
5152 silc_buffer_pull(buffer, len);
5154 if (user_mode_list) {
5156 silc_buffer_realloc(*user_mode_list,
5158 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5159 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5160 (*user_mode_list)->data));
5161 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5162 silc_buffer_pull(*user_mode_list, 4);
5165 silc_hash_table_list_reset(&htl);
5168 silc_buffer_push(buffer, buffer->data - buffer->head);
5169 if (user_mode_list && *user_mode_list)
5170 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5171 (*user_mode_list)->head));
5176 /* Task callback used to retrieve network statistical information from
5177 router server once in a while. */
5179 SILC_TASK_CALLBACK(silc_server_get_stats)
5181 SilcServer server = (SilcServer)context;
5182 SilcBuffer idp, packet;
5184 if (!server->standalone) {
5185 SILC_LOG_DEBUG(("Retrieving stats from router"));
5186 server->stat.commands_sent++;
5187 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5189 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5190 ++server->cmd_ident, 1,
5192 silc_buffer_len(idp));
5193 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5194 SILC_PACKET_COMMAND, 0, packet->data,
5195 silc_buffer_len(packet));
5196 silc_buffer_free(packet);
5197 silc_buffer_free(idp);
5201 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,