5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2007 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"));
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);
265 if (!silc_socket_stream_get_info(sock, NULL, NULL, &ip, &port))
268 SILC_LOG_ERROR(("Connection %s:%d [%s]: %s", ip, port,
269 SILC_CONNTYPE_STRING(idata->conn_type),
270 silc_packet_error_string(error)));
272 if (!silc_packet_stream_is_valid(stream))
275 silc_schedule_task_add_timeout(server->schedule,
276 silc_server_packet_error_timeout,
280 /* Packet stream callbacks */
281 static SilcPacketCallbacks silc_server_stream_cbs =
283 silc_server_packet_receive,
284 silc_server_packet_eos,
285 silc_server_packet_error
288 /* Parses the packet type and calls what ever routines the packet type
289 requires. This is done for all incoming packets. */
291 static void silc_server_packet_parse_type(SilcServer server,
292 SilcPacketStream sock,
295 SilcPacketType type = packet->type;
296 SilcIDListData idata = silc_packet_get_context(sock);
298 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
299 silc_get_packet_name(type), packet->flags));
301 /* Parse the packet type */
303 case SILC_PACKET_NOTIFY:
305 * Received notify packet. Server can receive notify packets from
306 * router. Server then relays the notify messages to clients if needed.
308 if (packet->flags & SILC_PACKET_FLAG_LIST)
309 silc_server_notify_list(server, sock, packet);
311 silc_server_notify(server, sock, packet);
315 * Private Message packets
317 case SILC_PACKET_PRIVATE_MESSAGE:
319 * Received private message packet. The packet is coming from either
322 if (packet->flags & SILC_PACKET_FLAG_LIST)
324 idata->last_receive = time(NULL);
325 silc_server_private_message(server, sock, packet);
331 case SILC_PACKET_CHANNEL_MESSAGE:
333 * Received channel message. Channel messages are special packets
334 * (although probably most common ones) thus they are handled
337 if (packet->flags & SILC_PACKET_FLAG_LIST)
339 idata->last_receive = time(NULL);
340 silc_server_channel_message(server, sock, packet);
346 case SILC_PACKET_COMMAND:
348 * Recived command. Processes the command request and allocates the
349 * command context and calls the command.
351 if (packet->flags & SILC_PACKET_FLAG_LIST)
353 server->stat.commands_received++;
354 silc_server_command_process(server, sock, packet);
357 case SILC_PACKET_COMMAND_REPLY:
359 * Received command reply packet. Received command reply to command. It
360 * may be reply to command sent by us or reply to command sent by client
361 * that we've routed further.
363 if (packet->flags & SILC_PACKET_FLAG_LIST)
365 server->stat.commands_received++;
366 silc_server_command_reply(server, sock, packet);
369 case SILC_PACKET_DISCONNECT:
372 char *message = NULL;
373 const char *hostname, *ip;
375 if (packet->flags & SILC_PACKET_FLAG_LIST)
377 if (silc_buffer_len(&packet->buffer) < 1)
380 status = (SilcStatus)packet->buffer.data[0];
381 if (silc_buffer_len(&packet->buffer) > 1 &&
382 silc_utf8_valid(packet->buffer.data + 1,
383 silc_buffer_len(&packet->buffer) - 1))
384 message = silc_memdup(packet->buffer.data + 1,
385 silc_buffer_len(&packet->buffer) - 1);
387 if (!silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
388 NULL, &hostname, &ip, NULL))
391 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s", ip, hostname,
392 silc_get_status_message(status), status,
393 message ? message : ""));
397 /* Do not switch to backup in case of error */
398 server->backup_noswitch = (status == SILC_STATUS_OK ? FALSE : TRUE);
400 /* If backup disconnected then mark that resuming will not be allowed */
401 if (server->server_type == SILC_ROUTER && !server->backup_router &&
402 idata->conn_type == SILC_CONN_SERVER) {
403 SilcServerEntry server_entry = (SilcServerEntry)idata;
404 if (server_entry->server_type == SILC_BACKUP_ROUTER)
405 server->backup_closed = TRUE;
408 /* Handle the disconnection from our end too */
409 if (SILC_IS_LOCAL(idata))
410 silc_server_free_sock_user_data(server, sock, NULL);
411 silc_server_close_connection(server, sock);
412 server->backup_noswitch = FALSE;
416 case SILC_PACKET_CHANNEL_KEY:
418 * Received key for channel. As channels are created by the router
419 * the keys are as well. We will distribute the key to all of our
420 * locally connected clients on the particular channel. Router
421 * never receives this channel and thus is ignored.
423 if (packet->flags & SILC_PACKET_FLAG_LIST)
425 silc_server_channel_key(server, sock, packet);
428 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
430 * Private message key packet.
432 if (packet->flags & SILC_PACKET_FLAG_LIST)
434 silc_server_private_message_key(server, sock, packet);
437 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
439 * Connection authentication request packet. When we receive this packet
440 * we will send to the other end information about our mandatory
441 * authentication method for the connection. This packet maybe received
444 if (packet->flags & SILC_PACKET_FLAG_LIST)
446 silc_server_connection_auth_request(server, sock, packet);
449 case SILC_PACKET_NEW_ID:
451 * Received New ID packet. This includes some new ID that has been
452 * created. It may be for client, server or channel. This is the way
453 * to distribute information about new registered entities in the
456 if (packet->flags & SILC_PACKET_FLAG_LIST)
457 silc_server_new_id_list(server, sock, packet);
459 silc_server_new_id(server, sock, packet);
462 case SILC_PACKET_NEW_CLIENT:
464 * Received new client packet. This includes client information that
465 * we will use to create initial client ID. After creating new
466 * ID we will send it to the client.
468 if (packet->flags & SILC_PACKET_FLAG_LIST)
470 silc_server_new_client(server, sock, packet);
473 case SILC_PACKET_NEW_SERVER:
475 * Received new server packet. This includes Server ID and some other
476 * information that we may save. This is received after server has
479 if (packet->flags & SILC_PACKET_FLAG_LIST)
481 silc_server_new_server(server, sock, packet);
484 case SILC_PACKET_NEW_CHANNEL:
486 * Received new channel packet. Information about new channel in the
487 * network are distributed using this packet.
489 if (packet->flags & SILC_PACKET_FLAG_LIST)
490 silc_server_new_channel_list(server, sock, packet);
492 silc_server_new_channel(server, sock, packet);
495 case SILC_PACKET_HEARTBEAT:
497 * Received heartbeat.
499 if (packet->flags & SILC_PACKET_FLAG_LIST)
503 case SILC_PACKET_KEY_AGREEMENT:
505 * Received heartbeat.
507 if (packet->flags & SILC_PACKET_FLAG_LIST)
509 silc_server_key_agreement(server, sock, packet);
512 case SILC_PACKET_REKEY:
514 * Received re-key packet. The sender wants to regenerate the session
517 if (packet->flags & SILC_PACKET_FLAG_LIST)
519 silc_server_rekey(server, sock, packet);
522 case SILC_PACKET_FTP:
524 if (packet->flags & SILC_PACKET_FLAG_LIST)
526 silc_server_ftp(server, sock, packet);
529 case SILC_PACKET_RESUME_CLIENT:
531 if (packet->flags & SILC_PACKET_FLAG_LIST)
533 silc_server_resume_client(server, sock, packet);
536 case SILC_PACKET_RESUME_ROUTER:
537 /* Resume router packet received. This packet is received for backup
538 router resuming protocol. */
539 if (packet->flags & SILC_PACKET_FLAG_LIST)
541 silc_server_backup_resume_router(server, sock, packet);
545 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
550 /****************************** Server API **********************************/
552 /* Allocates a new SILC server object. This has to be done before the server
553 can be used. After allocation one must call silc_server_init to initialize
554 the server. The new allocated server object is returned to the new_server
557 SilcBool silc_server_alloc(SilcServer *new_server)
561 SILC_LOG_DEBUG(("Allocating new server object"));
563 server = silc_calloc(1, sizeof(*server));
566 server->server_type = SILC_SERVER;
567 server->standalone = TRUE;
568 server->local_list = silc_calloc(1, sizeof(*server->local_list));
569 if (!server->local_list)
571 server->global_list = silc_calloc(1, sizeof(*server->global_list));
572 if (!server->global_list)
574 server->pending_commands = silc_dlist_init();
575 if (!server->pending_commands)
577 server->listeners = silc_dlist_init();
578 if (!server->listeners)
580 server->repository = silc_skr_alloc();
581 if (!server->repository)
583 server->conns = silc_dlist_init();
586 server->expired_clients = silc_dlist_init();
587 if (!server->expired_clients)
590 *new_server = server;
595 /* Free's the SILC server object. This is called at the very end before
598 void silc_server_free(SilcServer server)
601 SilcIDCacheEntry cache;
602 SilcIDListData idata;
604 SILC_LOG_DEBUG(("Free server %p", server));
609 silc_server_backup_free(server);
610 silc_server_config_unref(&server->config_ref);
612 silc_rng_free(server->rng);
613 if (server->public_key)
614 silc_pkcs_public_key_free(server->public_key);
615 if (server->private_key)
616 silc_pkcs_private_key_free(server->private_key);
617 if (server->pending_commands)
618 silc_dlist_uninit(server->pending_commands);
619 if (server->id_entry) {
620 if (server->id_entry->data.sconn)
621 silc_schedule_task_del_by_context(server->schedule,
622 server->id_entry->data.sconn->sock);
623 silc_idlist_del_server(server->local_list, server->id_entry);
626 /* Delete all channels */
627 if (silc_idcache_get_all(server->local_list->channels, &list)) {
628 silc_list_start(list);
629 while ((cache = silc_list_get(list)))
630 silc_idlist_del_channel(server->local_list, cache->context);
632 if (silc_idcache_get_all(server->global_list->channels, &list)) {
633 silc_list_start(list);
634 while ((cache = silc_list_get(list)))
635 silc_idlist_del_channel(server->global_list, cache->context);
638 /* Delete all clients */
639 if (silc_idcache_get_all(server->local_list->clients, &list)) {
640 silc_list_start(list);
641 while ((cache = silc_list_get(list))) {
642 silc_schedule_task_del_by_context(server->schedule, cache->context);
643 silc_idlist_del_client(server->local_list, cache->context);
646 if (silc_idcache_get_all(server->global_list->clients, &list)) {
647 silc_list_start(list);
648 while ((cache = silc_list_get(list))) {
649 silc_schedule_task_del_by_context(server->schedule, cache->context);
650 silc_idlist_del_client(server->global_list, cache->context);
654 /* Delete all servers */
655 if (silc_idcache_get_all(server->local_list->servers, &list)) {
656 silc_list_start(list);
657 while ((cache = silc_list_get(list))) {
658 idata = (SilcIDListData)cache->context;
660 silc_schedule_task_del_by_context(server->schedule,
662 silc_idlist_del_server(server->local_list, cache->context);
665 if (silc_idcache_get_all(server->global_list->servers, &list)) {
666 while ((cache = silc_list_get(list))) {
667 idata = (SilcIDListData)cache->context;
669 silc_schedule_task_del_by_context(server->schedule,
671 silc_idlist_del_server(server->global_list, cache->context);
675 silc_schedule_task_del_by_context(server->schedule, server);
676 silc_schedule_uninit(server->schedule);
677 server->schedule = NULL;
679 silc_idcache_free(server->local_list->clients);
680 silc_idcache_free(server->local_list->servers);
681 silc_idcache_free(server->local_list->channels);
682 silc_idcache_free(server->global_list->clients);
683 silc_idcache_free(server->global_list->servers);
684 silc_idcache_free(server->global_list->channels);
685 silc_hash_table_free(server->watcher_list);
686 silc_hash_table_free(server->watcher_list_pk);
687 silc_hash_free(server->md5hash);
688 silc_hash_free(server->sha1hash);
690 silc_dlist_uninit(server->listeners);
691 silc_dlist_uninit(server->conns);
692 silc_dlist_uninit(server->expired_clients);
693 silc_skr_free(server->repository);
694 silc_packet_engine_stop(server->packet_engine);
696 silc_free(server->local_list);
697 silc_free(server->global_list);
698 silc_free(server->server_name);
701 silc_hmac_unregister_all();
702 silc_hash_unregister_all();
703 silc_cipher_unregister_all();
704 silc_pkcs_unregister_all();
707 /* Creates a new server listener. */
709 static SilcNetListener
710 silc_server_listen(SilcServer server, const char *server_ip, SilcUInt16 port)
712 SilcNetListener listener;
715 silc_net_tcp_create_listener(&server_ip, 1, port, TRUE,
716 server->config->require_reverse_lookup,
718 silc_server_accept_new_connection, server);
720 SILC_SERVER_LOG_ERROR(("Could not create server listener: %s on %hu",
728 /* Adds a secondary listener. */
730 SilcBool silc_server_init_secondary(SilcServer server)
732 SilcServerConfigServerInfoInterface *interface;
733 SilcNetListener listener;
735 for (interface = server->config->server_info->secondary; interface;
736 interface = interface->next) {
737 listener = silc_server_listen(server, interface->server_ip,
741 silc_dlist_add(server->listeners, listener);
747 /* Initializes the entire SILC server. This is called always before running
748 the server. This is called only once at the initialization of the program.
749 This binds the server to its listenning port. After this function returns
750 one should call silc_server_run to start the server. This returns TRUE
751 when everything is ok to run the server. Configuration file must be
752 read and parsed before calling this. */
754 SilcBool silc_server_init(SilcServer server)
757 SilcServerEntry id_entry;
758 SilcNetListener listener;
762 SILC_LOG_DEBUG(("Initializing server"));
764 server->starttime = time(NULL);
766 /* Take config object for us */
767 silc_server_config_ref(&server->config_ref, server->config,
771 /* Set debugging on if configured */
772 if (server->config->debug_string) {
773 silc_log_debug(TRUE);
774 silc_log_set_debug_string(server->config->debug_string);
776 #endif /* SILC_DEBUG */
778 /* Steal public and private key from the config object */
779 server->public_key = server->config->server_info->public_key;
780 server->private_key = server->config->server_info->private_key;
781 server->config->server_info->public_key = NULL;
782 server->config->server_info->private_key = NULL;
784 /* Register all configured ciphers, PKCS and hash functions. */
785 if (!silc_server_config_register_ciphers(server))
786 silc_cipher_register_default();
787 if (!silc_server_config_register_pkcs(server))
788 silc_pkcs_register_default();
789 if (!silc_server_config_register_hashfuncs(server))
790 silc_hash_register_default();
791 if (!silc_server_config_register_hmacs(server))
792 silc_hmac_register_default();
794 /* Initialize random number generator for the server. */
795 server->rng = silc_rng_alloc();
796 silc_rng_init(server->rng);
797 silc_rng_global_init(server->rng);
799 /* Initialize hash functions for server to use */
800 silc_hash_alloc("md5", &server->md5hash);
801 silc_hash_alloc("sha1", &server->sha1hash);
803 /* Initialize the scheduler */
804 server->schedule = silc_schedule_init(server->config->param.connections_max,
806 if (!server->schedule)
809 /* First, register log files configuration for error output */
810 silc_server_config_setlogfiles(server);
812 /* Initialize ID caches */
813 server->local_list->clients =
814 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
816 server->local_list->servers =
817 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
819 server->local_list->channels =
820 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
823 /* These are allocated for normal server as well as these hold some
824 global information that the server has fetched from its router. For
825 router these are used as they are supposed to be used on router. */
826 server->global_list->clients =
827 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor,
829 server->global_list->servers =
830 silc_idcache_alloc(0, SILC_ID_SERVER, silc_idlist_server_destructor,
832 server->global_list->channels =
833 silc_idcache_alloc(0, SILC_ID_CHANNEL, silc_idlist_channel_destructor,
836 /* Init watcher lists */
837 server->watcher_list =
838 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
839 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
841 if (!server->watcher_list)
843 server->watcher_list_pk =
844 silc_hash_table_alloc(1, silc_hash_public_key, NULL,
845 silc_hash_public_key_compare, NULL,
847 if (!server->watcher_list_pk)
850 /* Create TCP listener */
851 listener = silc_server_listen(
853 server->config->server_info->primary == NULL ? NULL :
854 server->config->server_info->primary->server_ip,
855 server->config->server_info->primary == NULL ? 0 :
856 server->config->server_info->primary->port);
859 silc_dlist_add(server->listeners, listener);
861 /* Create a Server ID for the server. */
862 port = silc_net_listener_get_port(listener, NULL);
863 ip = silc_net_listener_get_ip(listener, NULL);
864 silc_id_create_server_id(server->config->server_info->primary->public_ip ?
865 server->config->server_info->primary->public_ip :
866 ip[0], port[0], server->rng, &id);
875 server->server_name = server->config->server_info->server_name;
876 server->config->server_info->server_name = NULL;
877 silc_id_id2str(server->id, SILC_ID_SERVER, server->id_string,
878 sizeof(server->id_string), &server->id_string_len);
880 /* Add ourselves to the server list. We don't have a router yet
881 beacuse we haven't established a route yet. It will be done later.
882 For now, NULL is sent as router. This allocates new entry to
885 silc_idlist_add_server(server->local_list, strdup(server->server_name),
887 silc_id_dup(server->id, SILC_ID_SERVER),
890 SILC_LOG_ERROR(("Could not add local server to cache"));
893 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
894 id_entry->data.conn_type = (server->server_type == SILC_SERVER ?
895 SILC_CONN_SERVER : SILC_CONN_ROUTER);
896 server->id_entry = id_entry;
898 /* Create secondary TCP listeners */
899 if (silc_server_init_secondary(server) == FALSE)
902 server->listenning = TRUE;
904 /* Create connections to configured routers. */
905 silc_server_create_connections(server);
907 /* If server connections has been configured then we must be router as
908 normal server cannot have server connections, only router connections. */
909 if (server->config->servers) {
910 SilcServerConfigServer *ptr = server->config->servers;
912 server->server_type = SILC_ROUTER;
914 if (ptr->backup_router) {
915 server->server_type = SILC_BACKUP_ROUTER;
916 server->backup_router = TRUE;
917 server->id_entry->server_type = SILC_BACKUP_ROUTER;
924 if (server->server_type != SILC_ROUTER) {
925 server->stat.servers = 1;
926 server->stat.cell_servers = 1;
928 server->stat.routers = 1;
931 /* If we are normal server we'll retrieve network statisticial information
932 once in a while from the router. */
933 if (server->server_type != SILC_ROUTER)
934 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,
937 /* Start packet engine */
938 server->packet_engine =
939 silc_packet_engine_start(server->rng, server->server_type == SILC_ROUTER,
940 &silc_server_stream_cbs, server);
941 if (!server->packet_engine)
944 /* Register client entry expiration timeout */
945 silc_schedule_task_add_timeout(server->schedule,
946 silc_server_purge_expired_clients, server,
949 /* Initialize HTTP server */
950 silc_server_http_init(server);
952 SILC_LOG_DEBUG(("Server initialized"));
954 /* We are done here, return succesfully */
958 silc_server_config_unref(&server->config_ref);
962 /* Task callback to close a socket connection after rehash */
964 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
966 SilcServer server = app_context;
967 SilcPacketStream sock = context;
968 SilcIDListData idata = silc_packet_get_context(sock);
969 const char *hostname;
972 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
973 NULL, &hostname, NULL, &port);
975 SILC_LOG_INFO(("Connection %s:%d [%s] is unconfigured",
976 hostname, port, SILC_CONNTYPE_STRING(idata->conn_type)));
977 silc_schedule_task_del_by_context(server->schedule, sock);
978 silc_server_disconnect_remote(server, sock,
979 SILC_STATUS_ERR_BANNED_FROM_SERVER,
980 "This connection is removed from "
982 silc_server_free_sock_user_data(server, sock, NULL);
985 /* This function basically reads the config file again and switches the config
986 object pointed by the server object. After that, we have to fix various
987 things such as the server_name and the listening ports.
988 Keep in mind that we no longer have the root privileges at this point. */
990 SilcBool silc_server_rehash(SilcServer server)
992 SilcServerConfig newconfig;
994 SILC_LOG_INFO(("Rehashing server"));
996 /* Reset the logging system */
997 silc_log_quick(TRUE);
998 silc_log_flush_all();
1000 /* Start the main rehash phase (read again the config file) */
1001 newconfig = silc_server_config_alloc(server->config_file, server);
1003 SILC_LOG_ERROR(("Rehash FAILED."));
1007 /* Fix the server_name field */
1008 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
1009 silc_free(server->server_name);
1011 /* Check server name */
1012 server->server_name =
1013 silc_identifier_check(newconfig->server_info->server_name,
1014 strlen(newconfig->server_info->server_name),
1015 SILC_STRING_LOCALE, 256, NULL);
1016 if (!server->server_name) {
1017 SILC_LOG_ERROR(("Malformed server name string '%s'",
1018 server->config->server_info->server_name));
1022 /* Update the idcache list with a fresh pointer */
1023 silc_free(server->id_entry->server_name);
1024 server->id_entry->server_name = strdup(server->server_name);
1025 silc_idcache_update_by_context(server->local_list->servers,
1026 server->id_entry, NULL,
1027 strdup(server->id_entry->server_name),
1032 silc_server_config_setlogfiles(server);
1034 /* Change new key pair if necessary */
1035 if (newconfig->server_info->public_key &&
1036 !silc_pkcs_public_key_compare(server->public_key,
1037 newconfig->server_info->public_key)) {
1038 silc_pkcs_public_key_free(server->public_key);
1039 silc_pkcs_private_key_free(server->private_key);
1040 server->public_key = newconfig->server_info->public_key;
1041 server->private_key = newconfig->server_info->private_key;
1042 newconfig->server_info->public_key = NULL;
1043 newconfig->server_info->private_key = NULL;
1046 /* Check for unconfigured server and router connections and close
1047 connections that were unconfigured. */
1049 if (server->config->routers) {
1050 SilcServerConfigRouter *ptr;
1051 SilcServerConfigRouter *newptr;
1054 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1057 /* Check whether new config has this one too */
1058 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
1059 if (silc_string_compare(newptr->host, ptr->host) &&
1060 newptr->port == ptr->port &&
1061 newptr->initiator == ptr->initiator) {
1067 if (!found && ptr->host) {
1068 /* Remove this connection */
1069 SilcPacketStream sock;
1070 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1071 ptr->host, ptr->port);
1073 silc_schedule_task_add_timeout(server->schedule,
1074 silc_server_rehash_close_connection,
1080 if (server->config->servers) {
1081 SilcServerConfigServer *ptr;
1082 SilcServerConfigServer *newptr;
1085 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
1088 /* Check whether new config has this one too */
1089 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
1090 if (silc_string_compare(newptr->host, ptr->host)) {
1096 if (!found && ptr->host) {
1097 /* Remove this connection */
1098 SilcPacketStream sock;
1099 sock = silc_server_find_socket_by_host(server, SILC_CONN_SERVER,
1102 silc_schedule_task_add_timeout(server->schedule,
1103 silc_server_rehash_close_connection,
1109 if (server->config->clients) {
1110 SilcServerConfigClient *ptr;
1111 SilcServerConfigClient *newptr;
1114 for (ptr = server->config->clients; ptr; ptr = ptr->next) {
1117 /* Check whether new config has this one too */
1118 for (newptr = newconfig->clients; newptr; newptr = newptr->next) {
1119 if (silc_string_compare(newptr->host, ptr->host)) {
1125 if (!found && ptr->host) {
1126 /* Remove this connection */
1127 SilcPacketStream sock;
1128 sock = silc_server_find_socket_by_host(server, SILC_CONN_CLIENT,
1131 silc_schedule_task_add_timeout(server->schedule,
1132 silc_server_rehash_close_connection,
1138 /* Create connections after rehash */
1139 silc_server_create_connections(server);
1141 /* Check whether our router status has changed */
1142 if (newconfig->servers) {
1143 SilcServerConfigServer *ptr = newconfig->servers;
1145 server->server_type = SILC_ROUTER;
1147 if (ptr->backup_router) {
1148 server->server_type = SILC_BACKUP_ROUTER;
1149 server->backup_router = TRUE;
1150 server->id_entry->server_type = SILC_BACKUP_ROUTER;
1157 /* Our old config is gone now. We'll unreference our reference made in
1158 silc_server_init and then destroy it since we are destroying it
1159 underneath the application (layer which called silc_server_init). */
1160 silc_server_config_unref(&server->config_ref);
1161 silc_server_config_destroy(server->config);
1163 /* Take new config context */
1164 server->config = newconfig;
1165 silc_server_config_ref(&server->config_ref, server->config, server->config);
1168 /* Set debugging on if configured */
1169 if (server->config->debug_string) {
1170 silc_log_debug(TRUE);
1171 silc_log_set_debug_string(server->config->debug_string);
1173 #endif /* SILC_DEBUG */
1175 SILC_LOG_DEBUG(("Server rehashed"));
1180 /* The heart of the server. This runs the scheduler thus runs the server.
1181 When this returns the server has been stopped and the program will
1184 void silc_server_run(SilcServer server)
1186 SILC_LOG_INFO(("SILC Server started"));
1188 /* Start the scheduler, the heart of the SILC server. When this returns
1189 the program will be terminated. */
1190 silc_schedule(server->schedule);
1193 /* Stops the SILC server. This function is used to shutdown the server.
1194 This is usually called after the scheduler has returned. After stopping
1195 the server one should call silc_server_free. */
1197 void silc_server_stop(SilcServer server)
1200 SilcPacketStream ps;
1201 SilcNetListener listener;
1203 SILC_LOG_INFO(("SILC Server shutting down"));
1205 server->server_shutdown = TRUE;
1207 /* Close all connections */
1208 if (server->packet_engine) {
1209 list = silc_packet_engine_get_streams(server->packet_engine);
1211 silc_dlist_start(list);
1212 while ((ps = silc_dlist_get(list))) {
1213 SilcIDListData idata = silc_packet_get_context(ps);
1215 if (!silc_packet_stream_is_valid(ps))
1219 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1221 silc_server_disconnect_remote(server, ps, SILC_STATUS_OK,
1222 "Server is shutting down");
1223 silc_server_free_sock_user_data(server, ps,
1224 "Server is shutting down");
1226 silc_packet_engine_free_streams_list(list);
1229 /* We are not connected to network anymore */
1230 server->standalone = TRUE;
1232 silc_dlist_start(server->listeners);
1233 while ((listener = silc_dlist_get(server->listeners)))
1234 silc_net_close_listener(listener);
1236 silc_server_http_uninit(server);
1238 /* Cancel any possible retry timeouts */
1239 silc_schedule_task_del_by_callback(server->schedule,
1240 silc_server_connect_router);
1241 silc_schedule_task_del_by_callback(server->schedule,
1242 silc_server_connect_to_router_retry);
1243 silc_schedule_task_del_by_callback(server->schedule,
1244 silc_server_connect_to_router);
1246 silc_schedule_stop(server->schedule);
1248 SILC_LOG_DEBUG(("Server stopped"));
1251 /* Purge expired client entries from the server */
1253 SILC_TASK_CALLBACK(silc_server_purge_expired_clients)
1255 SilcServer server = context;
1256 SilcClientEntry client;
1258 SilcUInt64 curtime = silc_time();
1260 SILC_LOG_DEBUG(("Expire timeout"));
1262 silc_dlist_start(server->expired_clients);
1263 while ((client = silc_dlist_get(server->expired_clients))) {
1264 if (client->data.status & SILC_IDLIST_STATUS_REGISTERED)
1267 /* For unregistered clients the created timestamp is actually
1268 unregistered timestamp. Make sure client remains in history
1269 at least 500 seconds. */
1270 if (curtime - client->data.created < 500)
1273 id_list = (client->data.status & SILC_IDLIST_STATUS_LOCAL ?
1274 server->local_list : server->global_list);
1276 silc_idlist_del_data(client);
1277 silc_idlist_del_client(id_list, client);
1278 silc_dlist_del(server->expired_clients, client);
1281 silc_schedule_task_add_timeout(server->schedule,
1282 silc_server_purge_expired_clients, server,
1287 /******************************* Connecting *********************************/
1289 /* Free connection context */
1291 void silc_server_connection_free(SilcServerConnection sconn)
1293 SILC_LOG_DEBUG(("Free connection %p", sconn));
1294 silc_dlist_del(sconn->server->conns, sconn);
1295 silc_server_config_unref(&sconn->conn);
1296 silc_free(sconn->remote_host);
1297 silc_free(sconn->backup_replace_ip);
1301 /* Creates connection to a remote router. */
1303 void silc_server_create_connection(SilcServer server,
1306 const char *remote_host, SilcUInt32 port,
1307 SilcServerConnectCallback callback,
1310 SilcServerConnection sconn;
1312 /* Allocate connection object for hold connection specific stuff. */
1313 sconn = silc_calloc(1, sizeof(*sconn));
1316 sconn->remote_host = strdup(remote_host);
1317 sconn->remote_port = port;
1318 sconn->no_reconnect = reconnect == FALSE;
1319 sconn->callback = callback;
1320 sconn->callback_context = context;
1321 sconn->no_conf = dynamic;
1322 sconn->server = server;
1324 SILC_LOG_DEBUG(("Created connection %p", sconn));
1326 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1330 /* Connection authentication completion callback */
1333 silc_server_ke_auth_compl(SilcConnAuth connauth, SilcBool success,
1336 SilcServerConnection sconn = context;
1337 SilcUnknownEntry entry = silc_packet_get_context(sconn->sock);
1338 SilcServer server = entry->server;
1339 SilcServerConfigServer *conn;
1340 SilcServerConfigConnParams *param;
1341 SilcIDListData idata;
1342 SilcServerEntry id_entry = NULL;
1343 unsigned char id[32];
1348 SILC_LOG_DEBUG(("Connection %p authentication completed", sconn));
1352 if (success == FALSE) {
1353 /* Authentication failed */
1354 /* XXX retry connecting */
1356 silc_server_disconnect_remote(server, sconn->sock,
1357 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1358 if (sconn->callback)
1359 (*sconn->callback)(server, NULL, sconn->callback_context);
1360 silc_server_connection_free(sconn);
1364 /* XXX For now remote is router always */
1365 entry->data.conn_type = SILC_CONN_ROUTER;
1367 SILC_LOG_INFO(("Connected to %s %s",
1368 SILC_CONNTYPE_STRING(entry->data.conn_type),
1369 sconn->remote_host));
1371 /* Create the actual entry for remote entity */
1372 switch (entry->data.conn_type) {
1373 case SILC_CONN_SERVER:
1374 SILC_LOG_DEBUG(("Remote is SILC server"));
1376 /* Add new server. The server must register itself to us before it
1377 becomes registered to SILC network. */
1378 id_entry = silc_idlist_add_server(server->local_list,
1379 strdup(sconn->remote_host),
1380 SILC_SERVER, NULL, NULL, sconn->sock);
1382 silc_server_disconnect_remote(server, sconn->sock,
1383 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1384 if (sconn->callback)
1385 (*sconn->callback)(server, NULL, sconn->callback_context);
1386 silc_server_connection_free(sconn);
1392 server->stat.my_servers++;
1393 if (server->server_type == SILC_ROUTER)
1394 server->stat.servers++;
1395 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1397 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1400 case SILC_CONN_ROUTER:
1401 SILC_LOG_DEBUG(("Remote is SILC router"));
1403 /* Register to network */
1404 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1405 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1406 SILC_STR_UI_SHORT(id_len),
1407 SILC_STR_DATA(id, id_len),
1408 SILC_STR_UI_SHORT(strlen(server->server_name)),
1409 SILC_STR_DATA(server->server_name,
1410 strlen(server->server_name)),
1412 silc_server_disconnect_remote(server, sconn->sock,
1413 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1414 if (sconn->callback)
1415 (*sconn->callback)(server, NULL, sconn->callback_context);
1416 silc_server_connection_free(sconn);
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 silc_server_disconnect_remote(server, sconn->sock,
1452 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1453 if (sconn->callback)
1454 (*sconn->callback)(server, NULL, sconn->callback_context);
1455 silc_server_connection_free(sconn);
1461 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1462 idata = (SilcIDListData)id_entry;
1463 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1464 SILC_IDLIST_STATUS_LOCAL);
1465 idata->sconn = sconn;
1468 server->stat.my_routers++;
1469 if (server->server_type == SILC_ROUTER)
1470 server->stat.routers++;
1471 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1473 if (!sconn->backup) {
1474 /* Mark this router our primary router if we're still standalone */
1475 if (server->standalone) {
1476 SILC_LOG_DEBUG(("This connection is our primary router"));
1477 server->id_entry->router = id_entry;
1478 server->router = id_entry;
1479 server->router->server_type = SILC_ROUTER;
1480 server->standalone = FALSE;
1481 server->backup_primary = FALSE;
1483 /* Announce data if we are not backup router (unless not as primary
1484 currently). Backup router announces later at the end of
1485 resuming protocol. */
1486 if (server->backup_router && server->server_type == SILC_ROUTER) {
1487 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1489 /* If we are router then announce our possible servers. Backup
1490 router announces also global servers. */
1491 if (server->server_type == SILC_ROUTER)
1492 silc_server_announce_servers(server,
1493 server->backup_router ? TRUE : FALSE,
1494 0, SILC_PRIMARY_ROUTE(server));
1496 /* Announce our clients and channels to the router */
1497 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1498 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1501 /* If we are backup router then this primary router is whom we are
1503 if (server->server_type == SILC_BACKUP_ROUTER) {
1504 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1506 NULL, NULL, &ip, NULL);
1507 silc_server_backup_add(server, server->id_entry, ip,
1508 sconn->remote_port, TRUE);
1512 /* We already have primary router. Disconnect this connection */
1513 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1514 silc_idlist_del_server(server->global_list, id_entry);
1515 silc_server_disconnect_remote(server, sconn->sock,
1516 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1517 if (sconn->callback)
1518 (*sconn->callback)(server, NULL, sconn->callback_context);
1519 silc_server_connection_free(sconn);
1525 /* Add this server to be our backup router */
1526 id_entry->server_type = SILC_BACKUP_ROUTER;
1527 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1528 sconn->backup_replace_port, FALSE);
1534 silc_server_disconnect_remote(server, sconn->sock,
1535 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1536 if (sconn->callback)
1537 (*sconn->callback)(server, NULL, sconn->callback_context);
1538 silc_server_connection_free(sconn);
1543 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1545 conn = sconn->conn.ref_ptr;
1546 param = &server->config->param;
1547 if (conn && conn->param)
1548 param = conn->param;
1550 /* Register rekey timeout */
1551 sconn->rekey_timeout = param->key_exchange_rekey;
1552 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1553 sconn->sock, sconn->rekey_timeout, 0);
1555 /* Set the entry as packet stream context */
1556 silc_packet_set_context(sconn->sock, id_entry);
1558 /* Call the completion callback to indicate that we've connected to
1560 if (sconn && sconn->callback)
1561 (*sconn->callback)(server, id_entry, sconn->callback_context);
1563 if (sconn == server->router_conn)
1564 server->router_conn = NULL;
1569 /* SKE completion callback */
1571 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1572 SilcSKESecurityProperties prop,
1573 SilcSKEKeyMaterial keymat,
1574 SilcSKERekeyMaterial rekey,
1577 SilcPacketStream sock = context;
1578 SilcUnknownEntry entry = silc_packet_get_context(sock);
1579 SilcServerConnection sconn = silc_ske_get_context(ske);
1580 SilcServer server = entry->server;
1581 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1582 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1583 void *auth_data = NULL;
1584 SilcUInt32 auth_data_len = 0;
1585 SilcConnAuth connauth;
1586 SilcCipher send_key, receive_key;
1587 SilcHmac hmac_send, hmac_receive;
1590 SILC_LOG_DEBUG(("Connection %p, SKE completed", sconn));
1594 if (status != SILC_SKE_STATUS_OK) {
1596 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1597 silc_ske_map_status(status), entry->hostname, entry->ip));
1599 /* XXX retry connecting */
1601 silc_server_disconnect_remote(server, sconn->sock,
1602 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1603 if (sconn->callback)
1604 (*sconn->callback)(server, NULL, sconn->callback_context);
1605 silc_server_connection_free(sconn);
1609 SILC_LOG_DEBUG(("Setting keys into use"));
1611 /* Set the keys into use. The data will be encrypted after this. */
1612 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1613 &hmac_send, &hmac_receive, &hash)) {
1615 /* XXX retry connecting */
1617 /* Error setting keys */
1619 silc_server_disconnect_remote(server, sconn->sock,
1620 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1621 if (sconn->callback)
1622 (*sconn->callback)(server, NULL, sconn->callback_context);
1623 silc_server_connection_free(sconn);
1626 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1627 hmac_receive, FALSE);
1629 SILC_LOG_DEBUG(("Starting connection authentication"));
1631 connauth = silc_connauth_alloc(server->schedule, ske,
1632 server->config->conn_auth_timeout);
1634 /* XXX retry connecting */
1636 /** Error allocating auth protocol */
1638 silc_server_disconnect_remote(server, sconn->sock,
1639 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1640 if (sconn->callback)
1641 (*sconn->callback)(server, NULL, sconn->callback_context);
1642 silc_server_connection_free(sconn);
1646 /* Get authentication method */
1648 if (conn->passphrase) {
1649 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1650 auth_meth = SILC_AUTH_PUBLIC_KEY;
1651 auth_data = server->private_key;
1653 auth_meth = SILC_AUTH_PASSWORD;
1654 auth_data = conn->passphrase;
1655 auth_data_len = conn->passphrase_len;
1658 auth_meth = SILC_AUTH_PUBLIC_KEY;
1659 auth_data = server->private_key;
1663 entry->data.rekey = rekey;
1665 /* Start connection authentication */
1667 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1668 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1669 auth_data, auth_data_len,
1670 silc_server_ke_auth_compl, sconn);
1673 /* Function that is called when the network connection to a router has
1674 been established. This will continue with the key exchange protocol
1675 with the remote router. */
1677 void silc_server_start_key_exchange(SilcServerConnection sconn)
1679 SilcServer server = sconn->server;
1680 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1681 SilcUnknownEntry entry;
1682 SilcSKEParamsStruct params;
1685 /* Cancel any possible retry timeouts */
1686 silc_schedule_task_del_by_context(server->schedule, sconn);
1688 /* Create packet stream */
1689 sconn->sock = silc_packet_stream_create(server->packet_engine,
1690 server->schedule, sconn->stream);
1692 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1693 silc_stream_destroy(sconn->stream);
1694 if (sconn->callback)
1695 (*sconn->callback)(server, NULL, sconn->callback_context);
1696 silc_server_connection_free(sconn);
1699 server->stat.conn_num++;
1701 /* Set source ID to packet stream */
1702 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1704 silc_packet_stream_destroy(sconn->sock);
1705 if (sconn->callback)
1706 (*sconn->callback)(server, NULL, sconn->callback_context);
1707 silc_server_connection_free(sconn);
1711 /* Create entry for remote entity */
1712 entry = silc_calloc(1, sizeof(*entry));
1714 silc_packet_stream_destroy(sconn->sock);
1715 silc_server_connection_free(sconn);
1718 entry->server = server;
1719 silc_packet_set_context(sconn->sock, 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 silc_packet_stream_destroy(sconn->sock);
1735 if (sconn->callback)
1736 (*sconn->callback)(server, NULL, sconn->callback_context);
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);
2153 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2155 switch (entry->conn_type) {
2156 case SILC_CONN_CLIENT:
2158 SilcClientEntry client;
2159 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2161 /* Verify whether this connection is after all allowed to connect */
2162 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2163 &server->config->param,
2165 silc_connauth_get_ske(connauth))) {
2166 server->stat.auth_failures++;
2170 /* If we are primary router and we have backup router configured
2171 but it has not connected to use yet, do not accept any other
2173 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2174 !server->backup_router) {
2175 SilcServerConfigRouter *router;
2176 router = silc_server_config_get_backup_router(server);
2177 if (router && strcmp(server->config->server_info->primary->server_ip,
2179 silc_server_find_socket_by_host(server,
2181 router->backup_replace_ip, 0)) {
2182 SILC_LOG_INFO(("Will not accept connections because we do "
2183 "not have backup router connection established"));
2184 silc_server_disconnect_remote(server, sock,
2185 SILC_STATUS_ERR_PERM_DENIED,
2186 "We do not have connection to backup "
2187 "router established, try later");
2188 server->stat.auth_failures++;
2190 /* From here on, wait 20 seconds for the backup router to appear. */
2191 silc_schedule_task_add_timeout(server->schedule,
2192 silc_server_backup_router_wait,
2193 (void *)server, 20, 0);
2198 SILC_LOG_DEBUG(("Remote host is client"));
2199 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2202 /* Add the client to the client ID cache. The nickname and Client ID
2203 and other information is created after we have received NEW_CLIENT
2204 packet from client. */
2205 client = silc_idlist_add_client(server->local_list,
2206 NULL, NULL, NULL, NULL, NULL, sock);
2208 SILC_LOG_ERROR(("Could not add new client to cache"));
2209 server->stat.auth_failures++;
2210 silc_server_disconnect_remote(server, sock,
2211 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2214 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2215 entry->data.conn_type = SILC_CONN_CLIENT;
2218 server->stat.my_clients++;
2219 server->stat.clients++;
2220 server->stat.cell_clients++;
2222 /* Get connection parameters */
2224 param = conn->param;
2226 if (!param->keepalive_secs)
2227 param->keepalive_secs = server->config->param.keepalive_secs;
2229 if (!param->qos && server->config->param.qos) {
2230 param->qos = server->config->param.qos;
2231 param->qos_rate_limit = server->config->param.qos_rate_limit;
2232 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2233 param->qos_limit_sec = server->config->param.qos_limit_sec;
2234 param->qos_limit_usec = server->config->param.qos_limit_usec;
2237 /* Check if to be anonymous connection */
2238 if (param->anonymous)
2239 client->mode |= SILC_UMODE_ANONYMOUS;
2242 /* Add public key to repository */
2243 SILC_LOG_DEBUG(("Add client public key to repository"));
2244 if (!silc_server_get_public_key_by_client(server, client, NULL))
2245 silc_skr_add_public_key_simple(server->repository,
2246 entry->data.public_key,
2247 SILC_SKR_USAGE_IDENTIFICATION, client,
2250 id_entry = (void *)client;
2254 case SILC_CONN_SERVER:
2255 case SILC_CONN_ROUTER:
2257 SilcServerEntry new_server;
2258 SilcBool initiator = FALSE;
2259 SilcBool backup_local = FALSE;
2260 SilcBool backup_router = FALSE;
2261 char *backup_replace_ip = NULL;
2262 SilcUInt16 backup_replace_port = 0;
2263 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2264 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2266 /* If we are backup router and this is incoming server connection
2267 and we do not have connection to primary router, do not allow
2269 if (server->server_type == SILC_BACKUP_ROUTER &&
2270 entry->conn_type == SILC_CONN_SERVER &&
2271 !SILC_PRIMARY_ROUTE(server)) {
2272 SILC_LOG_INFO(("Will not accept server connection because we do "
2273 "not have primary router connection established"));
2274 silc_server_disconnect_remote(server, sock,
2275 SILC_STATUS_ERR_PERM_DENIED,
2276 "We do not have connection to primary "
2277 "router established, try later");
2278 server->stat.auth_failures++;
2282 if (entry->conn_type == SILC_CONN_ROUTER) {
2283 /* Verify whether this connection is after all allowed to connect */
2284 if (!silc_server_connection_allowed(server, sock,
2286 &server->config->param,
2287 rconn ? rconn->param : NULL,
2288 silc_connauth_get_ske(connauth))) {
2289 server->stat.auth_failures++;
2295 param = rconn->param;
2297 if (!param->keepalive_secs)
2298 param->keepalive_secs = server->config->param.keepalive_secs;
2300 if (!param->qos && server->config->param.qos) {
2301 param->qos = server->config->param.qos;
2302 param->qos_rate_limit = server->config->param.qos_rate_limit;
2303 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2304 param->qos_limit_sec = server->config->param.qos_limit_sec;
2305 param->qos_limit_usec = server->config->param.qos_limit_usec;
2309 initiator = rconn->initiator;
2310 backup_local = rconn->backup_local;
2311 backup_router = rconn->backup_router;
2312 backup_replace_ip = rconn->backup_replace_ip;
2313 backup_replace_port = rconn->backup_replace_port;
2317 if (entry->conn_type == SILC_CONN_SERVER) {
2318 /* Verify whether this connection is after all allowed to connect */
2319 if (!silc_server_connection_allowed(server, sock,
2321 &server->config->param,
2322 srvconn ? srvconn->param : NULL,
2323 silc_connauth_get_ske(connauth))) {
2324 server->stat.auth_failures++;
2328 if (srvconn->param) {
2329 param = srvconn->param;
2331 if (!param->keepalive_secs)
2332 param->keepalive_secs = server->config->param.keepalive_secs;
2334 if (!param->qos && server->config->param.qos) {
2335 param->qos = server->config->param.qos;
2336 param->qos_rate_limit = server->config->param.qos_rate_limit;
2337 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2338 param->qos_limit_sec = server->config->param.qos_limit_sec;
2339 param->qos_limit_usec = server->config->param.qos_limit_usec;
2343 backup_router = srvconn->backup_router;
2347 /* If we are primary router and we have backup router configured
2348 but it has not connected to use yet, do not accept any other
2350 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2351 !server->backup_router && !backup_router) {
2352 SilcServerConfigRouter *router;
2353 router = silc_server_config_get_backup_router(server);
2354 if (router && strcmp(server->config->server_info->primary->server_ip,
2356 silc_server_find_socket_by_host(server,
2358 router->backup_replace_ip, 0)) {
2359 SILC_LOG_INFO(("Will not accept connections because we do "
2360 "not have backup router connection established"));
2361 silc_server_disconnect_remote(server, sock,
2362 SILC_STATUS_ERR_PERM_DENIED,
2363 "We do not have connection to backup "
2364 "router established, try later");
2365 server->stat.auth_failures++;
2367 /* From here on, wait 20 seconds for the backup router to appear. */
2368 silc_schedule_task_add_timeout(server->schedule,
2369 silc_server_backup_router_wait,
2370 (void *)server, 20, 0);
2375 SILC_LOG_DEBUG(("Remote host is %s",
2376 entry->conn_type == SILC_CONN_SERVER ?
2377 "server" : (backup_router ?
2378 "backup router" : "router")));
2379 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2380 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2381 "server" : (backup_router ?
2382 "backup router" : "router")));
2384 /* Add the server into server cache. The server name and Server ID
2385 is updated after we have received NEW_SERVER packet from the
2386 server. We mark ourselves as router for this server if we really
2389 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2390 server->local_list : (backup_router ?
2391 server->local_list :
2392 server->global_list)),
2394 (entry->conn_type == SILC_CONN_SERVER ?
2395 SILC_SERVER : SILC_ROUTER),
2397 (entry->conn_type == SILC_CONN_SERVER ?
2398 server->id_entry : (backup_router ?
2399 server->id_entry : NULL)),
2402 SILC_LOG_ERROR(("Could not add new server to cache"));
2403 silc_server_disconnect_remote(server, sock,
2404 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2405 server->stat.auth_failures++;
2408 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2409 entry->data.conn_type = entry->conn_type;
2411 id_entry = (void *)new_server;
2413 /* If the incoming connection is router and marked as backup router
2414 then add it to be one of our backups */
2415 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2416 /* Change it back to SERVER type since that's what it really is. */
2418 entry->data.conn_type = SILC_CONN_SERVER;
2419 new_server->server_type = SILC_BACKUP_ROUTER;
2421 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2422 ("Backup router %s is now online",
2425 /* Remove the backup waiting with timeout */
2426 silc_schedule_task_add_timeout(server->schedule,
2427 silc_server_backup_router_wait,
2428 (void *)server, 10, 0);
2432 if (entry->data.conn_type == SILC_CONN_SERVER) {
2433 server->stat.my_servers++;
2434 server->stat.servers++;
2435 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2437 server->stat.my_routers++;
2438 server->stat.routers++;
2439 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2442 /* Check whether this connection is to be our primary router connection
2443 if we do not already have the primary route. */
2444 if (!backup_router &&
2445 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2446 if (silc_server_config_is_primary_route(server) && !initiator)
2449 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2450 server->standalone = FALSE;
2451 if (!server->id_entry->router) {
2452 server->id_entry->router = id_entry;
2453 server->router = id_entry;
2465 /* Add connection to server->conns so that we know we have connection
2467 sconn = silc_calloc(1, sizeof(*sconn));
2468 sconn->server = server;
2470 sconn->remote_host = strdup(hostname);
2471 sconn->remote_port = port;
2472 silc_dlist_add(server->conns, sconn);
2473 idata->sconn = sconn;
2474 idata->last_receive = time(NULL);
2476 /* Add the common data structure to the ID entry. */
2477 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2478 silc_packet_set_context(sock, id_entry);
2480 /* Connection has been fully established now. Everything is ok. */
2481 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2483 /* Perform Quality of Service */
2485 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2486 param->qos_rate_limit, param->qos_bytes_limit,
2487 param->qos_limit_sec, param->qos_limit_usec);
2489 silc_server_config_unref(&entry->cconfig);
2490 silc_server_config_unref(&entry->sconfig);
2491 silc_server_config_unref(&entry->rconfig);
2495 silc_ske_free(silc_connauth_get_ske(connauth));
2496 silc_connauth_free(connauth);
2499 /* SKE completion callback. We set the new keys into use here. */
2502 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2503 SilcSKESecurityProperties prop,
2504 SilcSKEKeyMaterial keymat,
2505 SilcSKERekeyMaterial rekey,
2508 SilcPacketStream sock = context;
2509 SilcUnknownEntry entry = silc_packet_get_context(sock);
2510 SilcIDListData idata = (SilcIDListData)entry;
2511 SilcServer server = entry->server;
2512 SilcConnAuth connauth;
2513 SilcCipher send_key, receive_key;
2514 SilcHmac hmac_send, hmac_receive;
2521 if (status != SILC_SKE_STATUS_OK) {
2523 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2524 silc_ske_map_status(status), entry->hostname, entry->ip));
2526 silc_server_disconnect_remote(server, sock,
2527 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2531 SILC_LOG_DEBUG(("Setting keys into use"));
2533 /* Set the keys into use. The data will be encrypted after this. */
2534 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2535 &hmac_send, &hmac_receive, &hash)) {
2536 /* Error setting keys */
2538 silc_server_disconnect_remote(server, sock,
2539 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2542 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2543 hmac_receive, FALSE);
2545 idata->rekey = rekey;
2546 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2547 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2548 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2550 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2552 SILC_LOG_DEBUG(("Starting connection authentication"));
2553 server->stat.auth_attempts++;
2555 connauth = silc_connauth_alloc(server->schedule, ske,
2556 server->config->conn_auth_timeout);
2558 /** Error allocating auth protocol */
2560 silc_server_disconnect_remote(server, sock,
2561 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2565 /* Start connection authentication */
2567 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2568 silc_server_accept_auth_compl, sock);
2571 /* Accept new TCP connection */
2573 static void silc_server_accept_new_connection(SilcNetStatus status,
2577 SilcServer server = context;
2578 SilcPacketStream packet_stream;
2579 SilcServerConfigClient *cconfig = NULL;
2580 SilcServerConfigServer *sconfig = NULL;
2581 SilcServerConfigRouter *rconfig = NULL;
2582 SilcServerConfigDeny *deny;
2583 SilcUnknownEntry entry;
2585 SilcSKEParamsStruct params;
2586 char *hostname, *ip;
2589 SILC_LOG_DEBUG(("Accepting new connection"));
2591 /* Check for maximum allowed connections */
2592 server->stat.conn_attempts++;
2593 if (silc_dlist_count(server->conns) >
2594 server->config->param.connections_max) {
2595 SILC_LOG_ERROR(("Refusing connection, server is full"));
2596 server->stat.conn_failures++;
2597 silc_stream_destroy(stream);
2601 /* Get hostname, IP and port */
2602 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2603 (const char **)&ip, &port)) {
2604 /* Bad socket stream */
2605 server->stat.conn_failures++;
2606 silc_stream_destroy(stream);
2610 /* Create packet stream */
2611 packet_stream = silc_packet_stream_create(server->packet_engine,
2612 server->schedule, stream);
2613 if (!packet_stream) {
2614 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2615 server->stat.conn_failures++;
2616 silc_stream_destroy(stream);
2619 server->stat.conn_num++;
2621 /* Set source ID to packet stream */
2622 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2625 server->stat.conn_failures++;
2626 silc_packet_stream_destroy(packet_stream);
2630 /* Check whether this connection is denied to connect to us. */
2631 deny = silc_server_config_find_denied(server, ip);
2633 deny = silc_server_config_find_denied(server, hostname);
2635 /* The connection is denied */
2636 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2637 silc_server_disconnect_remote(server, packet_stream,
2638 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2643 /* Check whether we have configured this sort of connection at all. We
2644 have to check all configurations since we don't know what type of
2645 connection this is. */
2646 if (!(cconfig = silc_server_config_find_client(server, ip)))
2647 cconfig = silc_server_config_find_client(server, hostname);
2648 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2649 sconfig = silc_server_config_find_server_conn(server, hostname);
2650 if (server->server_type == SILC_ROUTER)
2651 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2652 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2653 if (!cconfig && !sconfig && !rconfig) {
2654 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2655 server->stat.conn_failures++;
2656 silc_server_disconnect_remote(server, packet_stream,
2657 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2661 /* The connection is allowed */
2662 entry = silc_calloc(1, sizeof(*entry));
2664 server->stat.conn_failures++;
2665 silc_server_disconnect_remote(server, packet_stream,
2666 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2669 entry->hostname = hostname;
2672 entry->server = server;
2673 entry->data.conn_type = SILC_CONN_UNKNOWN;
2674 silc_packet_set_context(packet_stream, entry);
2676 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2677 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2678 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2680 /* Take flags for key exchange. Since we do not know what type of connection
2681 this is, we go through all found configurations and use the global ones
2682 as well. This will result always into strictest key exchange flags. */
2683 memset(¶ms, 0, sizeof(params));
2684 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2685 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2686 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2687 if (server->config->param.key_exchange_pfs)
2688 params.flags |= SILC_SKE_SP_FLAG_PFS;
2690 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2691 server->stat.conn_attempts++;
2693 /* Start SILC Key Exchange protocol */
2694 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2695 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2696 server->public_key, server->private_key,
2699 server->stat.conn_failures++;
2700 silc_server_disconnect_remote(server, packet_stream,
2701 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2704 silc_ske_set_callbacks(ske, silc_server_verify_key,
2705 silc_server_accept_completed, packet_stream);
2707 /* Start key exchange protocol */
2708 params.version = silc_version_string;
2709 params.timeout_secs = server->config->key_exchange_timeout;
2710 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2714 /********************************** Rekey ***********************************/
2716 /* Initiator rekey completion callback */
2718 static void silc_server_rekey_completion(SilcSKE ske,
2719 SilcSKEStatus status,
2720 const SilcSKESecurityProperties prop,
2721 const SilcSKEKeyMaterial keymat,
2722 SilcSKERekeyMaterial rekey,
2725 SilcPacketStream sock = context;
2726 SilcIDListData idata = silc_packet_get_context(sock);
2727 SilcServer server = idata->sconn->server;
2729 idata->sconn->op = NULL;
2730 if (status != SILC_SKE_STATUS_OK) {
2731 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2732 idata->sconn->remote_host));
2736 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2737 idata->sconn->remote_host, idata->sconn->remote_port,
2738 SILC_CONNTYPE_STRING(idata->conn_type)));
2740 /* Save rekey data for next rekey */
2741 idata->rekey = rekey;
2743 /* Register new rekey timeout */
2744 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2745 sock, idata->sconn->rekey_timeout, 0);
2748 /* Rekey callback. Start rekey as initiator */
2750 SILC_TASK_CALLBACK(silc_server_do_rekey)
2752 SilcServer server = app_context;
2753 SilcPacketStream sock = context;
2754 SilcIDListData idata = silc_packet_get_context(sock);
2757 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2759 /* Do not execute rekey with disabled connections */
2760 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2763 /* If another protocol is active do not start rekey */
2764 if (idata->sconn->op) {
2765 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2766 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2771 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2772 idata->sconn->remote_host, idata->sconn->remote_port,
2773 SILC_CONNTYPE_STRING(idata->conn_type)));
2776 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2777 server->public_key, NULL, sock);
2781 /* Set SKE callbacks */
2782 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2785 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2788 /* Responder rekey completion callback */
2791 silc_server_rekey_resp_completion(SilcSKE ske,
2792 SilcSKEStatus status,
2793 const SilcSKESecurityProperties prop,
2794 const SilcSKEKeyMaterial keymat,
2795 SilcSKERekeyMaterial rekey,
2798 SilcPacketStream sock = context;
2799 SilcIDListData idata = silc_packet_get_context(sock);
2801 idata->sconn->op = NULL;
2802 if (status != SILC_SKE_STATUS_OK) {
2803 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2804 idata->sconn->remote_host));
2808 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2809 idata->sconn->remote_host, idata->sconn->remote_port,
2810 SILC_CONNTYPE_STRING(idata->conn_type)));
2812 /* Save rekey data for next rekey */
2813 idata->rekey = rekey;
2816 /* Start rekey as responder */
2818 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2821 SilcIDListData idata = silc_packet_get_context(sock);
2824 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2825 idata->sconn->remote_host, idata->sconn->remote_port,
2826 SILC_CONNTYPE_STRING(idata->conn_type)));
2829 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2830 server->public_key, NULL, sock);
2832 silc_packet_free(packet);
2836 /* Set SKE callbacks */
2837 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2840 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2845 /****************************** Disconnection *******************************/
2847 /* Destroys packet stream. */
2849 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2851 silc_packet_stream_unref(context);
2854 /* Closes connection to socket connection */
2856 void silc_server_close_connection(SilcServer server,
2857 SilcPacketStream sock)
2859 SilcIDListData idata = silc_packet_get_context(sock);
2861 const char *hostname;
2864 if (!silc_packet_stream_is_valid(sock))
2867 memset(tmp, 0, sizeof(tmp));
2868 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2869 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2870 NULL, &hostname, NULL, &port);
2871 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2872 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2873 tmp[0] ? tmp : ""));
2875 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2877 if (idata && idata->sconn) {
2878 silc_server_connection_free(idata->sconn);
2879 idata->sconn = NULL;
2882 /* Take a reference and then destroy the stream. The last reference
2883 is released later in a timeout callback. */
2884 silc_packet_stream_ref(sock);
2885 silc_packet_stream_destroy(sock);
2887 /* Close connection with timeout */
2888 server->stat.conn_num--;
2889 silc_schedule_task_del_by_all(server->schedule, 0,
2890 silc_server_close_connection_final, sock);
2891 silc_schedule_task_add_timeout(server->schedule,
2892 silc_server_close_connection_final,
2896 /* Sends disconnect message to remote connection and disconnects the
2899 void silc_server_disconnect_remote(SilcServer server,
2900 SilcPacketStream sock,
2901 SilcStatus status, ...)
2903 unsigned char buf[512];
2910 SILC_LOG_DEBUG(("Disconnecting remote host"));
2912 va_start(ap, status);
2913 cp = va_arg(ap, char *);
2915 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2918 /* Send SILC_PACKET_DISCONNECT */
2919 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2920 SILC_STR_UI_CHAR(status),
2921 SILC_STR_UI8_STRING(cp ? buf : NULL),
2924 /* Close connection */
2925 silc_server_close_connection(server, sock);
2928 /* Frees client data and notifies about client's signoff. */
2930 void silc_server_free_client_data(SilcServer server,
2931 SilcPacketStream sock,
2932 SilcClientEntry client,
2934 const char *signoff)
2936 SILC_LOG_DEBUG(("Freeing client %p data", client));
2939 /* Check if anyone is watching this nickname */
2940 if (server->server_type == SILC_ROUTER)
2941 silc_server_check_watcher_list(server, client, NULL,
2942 SILC_NOTIFY_TYPE_SIGNOFF);
2944 /* Send SIGNOFF notify to routers. */
2946 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2947 SILC_BROADCAST(server), client->id,
2951 /* Remove client from all channels */
2953 silc_server_remove_from_channels(server, NULL, client,
2954 TRUE, (char *)signoff, TRUE, FALSE);
2956 silc_server_remove_from_channels(server, NULL, client,
2957 FALSE, NULL, FALSE, FALSE);
2959 /* Remove this client from watcher list if it is */
2960 silc_server_del_from_watcher_list(server, client);
2962 /* Remove client's public key from repository, this will free it too. */
2963 if (client->data.public_key) {
2964 silc_skr_del_public_key(server->repository, client->data.public_key,
2966 client->data.public_key = NULL;
2969 /* Update statistics */
2970 server->stat.my_clients--;
2971 server->stat.clients--;
2972 if (server->stat.cell_clients)
2973 server->stat.cell_clients--;
2974 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2975 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2976 silc_schedule_task_del_by_context(server->schedule, client);
2978 if (client->data.sconn)
2979 silc_server_connection_free(client->data.sconn);
2981 /* We will not delete the client entry right away. We will take it
2982 into history (for WHOWAS command) for 5 minutes, unless we're
2983 shutting down server. */
2984 if (!server->server_shutdown) {
2985 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2987 client->router = NULL;
2988 client->connection = NULL;
2989 client->data.created = silc_time();
2990 silc_dlist_add(server->expired_clients, client);
2992 /* Delete directly since we're shutting down server */
2993 SILC_LOG_DEBUG(("Delete client directly"));
2994 silc_idlist_del_data(client);
2995 silc_idlist_del_client(server->local_list, client);
2999 /* Frees user_data pointer from socket connection object. This also sends
3000 appropriate notify packets to the network to inform about leaving
3003 void silc_server_free_sock_user_data(SilcServer server,
3004 SilcPacketStream sock,
3005 const char *signoff_message)
3007 SilcIDListData idata = silc_packet_get_context(sock);
3011 SILC_LOG_DEBUG(("Start"));
3016 silc_schedule_task_del_by_context(server->schedule, sock);
3018 /* Cancel active protocols */
3020 if (idata->sconn && idata->sconn->op) {
3021 SILC_LOG_DEBUG(("Abort active protocol"));
3022 silc_async_abort(idata->sconn->op, NULL, NULL);
3024 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3025 ((SilcUnknownEntry)idata)->op) {
3026 SILC_LOG_DEBUG(("Abort active protocol"));
3027 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3031 switch (idata->conn_type) {
3032 case SILC_CONN_CLIENT:
3034 SilcClientEntry client_entry = (SilcClientEntry)idata;
3035 silc_server_free_client_data(server, sock, client_entry, TRUE,
3037 silc_packet_set_context(sock, NULL);
3041 case SILC_CONN_SERVER:
3042 case SILC_CONN_ROUTER:
3044 SilcServerEntry user_data = (SilcServerEntry)idata;
3045 SilcServerEntry backup_router = NULL;
3047 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3050 backup_router = silc_server_backup_get(server, user_data->id);
3052 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3053 backup_router == server->id_entry &&
3054 idata->conn_type != SILC_CONN_ROUTER)
3055 backup_router = NULL;
3057 if (server->server_shutdown || server->backup_noswitch)
3058 backup_router = NULL;
3060 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3061 NULL, NULL, &ip, &port);
3063 /* If this was our primary router connection then we're lost to
3064 the outside world. */
3065 if (server->router == user_data) {
3066 /* Check whether we have a backup router connection */
3067 if (!backup_router || backup_router == user_data) {
3068 if (!server->no_reconnect)
3069 silc_server_create_connections(server);
3070 server->id_entry->router = NULL;
3071 server->router = NULL;
3072 server->standalone = TRUE;
3073 server->backup_primary = FALSE;
3074 backup_router = NULL;
3076 if (server->id_entry != backup_router) {
3077 SILC_LOG_INFO(("New primary router is backup router %s",
3078 backup_router->server_name));
3079 server->id_entry->router = backup_router;
3080 server->router = backup_router;
3081 server->router_connect = time(0);
3082 server->backup_primary = TRUE;
3083 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3085 /* Send START_USE to backup router to indicate we have switched */
3086 silc_server_backup_send_start_use(server,
3087 backup_router->connection,
3090 SILC_LOG_INFO(("We are now new primary router in this cell"));
3091 server->id_entry->router = NULL;
3092 server->router = NULL;
3093 server->standalone = TRUE;
3096 /* We stop here to take a breath */
3099 if (server->backup_router) {
3100 server->server_type = SILC_ROUTER;
3102 /* We'll need to constantly try to reconnect to the primary
3103 router so that we'll see when it comes back online. */
3104 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3105 silc_server_backup_connected,
3109 /* Mark this connection as replaced */
3110 silc_server_backup_replaced_add(server, user_data->id,
3113 } else if (backup_router) {
3114 SILC_LOG_INFO(("Enabling the use of backup router %s",
3115 backup_router->server_name));
3117 /* Mark this connection as replaced */
3118 silc_server_backup_replaced_add(server, user_data->id,
3120 } else if (server->server_type == SILC_SERVER &&
3121 idata->conn_type == SILC_CONN_ROUTER) {
3122 /* Reconnect to the router (backup) */
3123 if (!server->no_reconnect)
3124 silc_server_create_connections(server);
3127 if (user_data->server_name)
3128 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3129 ("Server %s signoff", user_data->server_name));
3131 if (!backup_router) {
3132 /* Remove all servers that are originated from this server, and
3133 remove the clients of those servers too. */
3134 silc_server_remove_servers_by_server(server, user_data, TRUE);
3137 /* Remove the clients that this server owns as they will become
3138 invalid now too. For backup router the server is actually
3139 coming from the primary router, so mark that as the owner
3141 if (server->server_type == SILC_BACKUP_ROUTER &&
3142 sock->type == SILC_CONN_SERVER)
3143 silc_server_remove_clients_by_server(server, server->router,
3147 silc_server_remove_clients_by_server(server, user_data,
3150 /* Remove channels owned by this server */
3151 if (server->server_type == SILC_SERVER)
3152 silc_server_remove_channels_by_server(server, user_data);
3154 /* Enable local server connections that may be disabled */
3155 silc_server_local_servers_toggle_enabled(server, TRUE);
3157 /* Update the client entries of this server to the new backup
3158 router. If we are the backup router we also resolve the real
3159 servers for the clients. After updating is over this also
3160 removes the clients that this server explicitly owns. */
3161 silc_server_update_clients_by_server(server, user_data,
3162 backup_router, TRUE);
3164 /* If we are router and just lost our primary router (now standlaone)
3165 we remove everything that was behind it, since we don't know
3167 if (server->server_type == SILC_ROUTER && server->standalone)
3168 /* Remove all servers that are originated from this server, and
3169 remove the clients of those servers too. */
3170 silc_server_remove_servers_by_server(server, user_data, TRUE);
3172 /* Finally remove the clients that are explicitly owned by this
3173 server. They go down with the server. */
3174 silc_server_remove_clients_by_server(server, user_data,
3177 /* Update our server cache to use the new backup router too. */
3178 silc_server_update_servers_by_server(server, user_data, backup_router);
3179 if (server->server_type == SILC_SERVER)
3180 silc_server_update_channels_by_server(server, user_data,
3183 /* Send notify about primary router going down to local operators */
3184 if (server->backup_router)
3185 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3186 SILC_NOTIFY_TYPE_NONE,
3187 ("%s switched to backup router %s "
3188 "(we are primary router now)",
3189 server->server_name, server->server_name));
3190 else if (server->router)
3191 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3192 SILC_NOTIFY_TYPE_NONE,
3193 ("%s switched to backup router %s",
3194 server->server_name,
3195 server->router->server_name));
3197 server->backup_noswitch = FALSE;
3200 silc_server_connection_free(idata->sconn);
3203 if (idata->conn_type == SILC_CONN_SERVER) {
3204 server->stat.my_servers--;
3205 server->stat.servers--;
3206 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3207 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3208 server->stat.my_routers--;
3209 server->stat.routers--;
3210 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3212 if (server->server_type == SILC_ROUTER)
3213 server->stat.cell_servers--;
3215 /* Free the server entry */
3216 silc_server_backup_del(server, user_data);
3217 silc_server_backup_replaced_del(server, user_data);
3218 silc_idlist_del_data(user_data);
3219 if (!silc_idlist_del_server(server->local_list, user_data))
3220 silc_idlist_del_server(server->global_list, user_data);
3222 if (backup_router && backup_router != server->id_entry) {
3223 /* Announce all of our stuff that was created about 5 minutes ago.
3224 The backup router knows all the other stuff already. */
3225 if (server->server_type == SILC_ROUTER)
3226 silc_server_announce_servers(server, FALSE, time(0) - 300,
3227 backup_router->connection);
3229 /* Announce our clients and channels to the router */
3230 silc_server_announce_clients(server, time(0) - 300,
3231 backup_router->connection);
3232 silc_server_announce_channels(server, time(0) - 300,
3233 backup_router->connection);
3236 silc_packet_set_context(sock, NULL);
3242 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3244 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3247 silc_server_connection_free(idata->sconn);
3248 silc_idlist_del_data(idata);
3250 silc_packet_set_context(sock, NULL);
3256 /* Removes client from all channels it has joined. This is used when client
3257 connection is disconnected. If the client on a channel is last, the
3258 channel is removed as well. This sends the SIGNOFF notify types. */
3260 void silc_server_remove_from_channels(SilcServer server,
3261 SilcPacketStream sock,
3262 SilcClientEntry client,
3264 const char *signoff_message,
3268 SilcChannelEntry channel;
3269 SilcChannelClientEntry chl;
3270 SilcHashTableList htl;
3271 SilcBuffer clidp = NULL;
3276 if (notify && !client->id)
3279 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3280 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3283 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3288 /* Remove the client from all channels. The client is removed from
3289 the channels' user list. */
3290 silc_hash_table_list(client->channels, &htl);
3291 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3292 channel = chl->channel;
3294 /* Remove channel if this is last client leaving the channel, unless
3295 the channel is permanent. */
3296 if (server->server_type != SILC_SERVER &&
3297 silc_hash_table_count(channel->user_list) < 2) {
3298 silc_server_channel_delete(server, channel);
3302 silc_hash_table_del(client->channels, channel);
3303 silc_hash_table_del(channel->user_list, client);
3304 channel->user_count--;
3306 /* If there is no global users on the channel anymore mark the channel
3307 as local channel. Do not check if the removed client is local client. */
3308 if (server->server_type == SILC_SERVER && channel->global_users &&
3309 chl->client->router && !silc_server_channel_has_global(channel))
3310 channel->global_users = FALSE;
3312 memset(chl, 'A', sizeof(*chl));
3315 /* Update statistics */
3316 if (SILC_IS_LOCAL(client))
3317 server->stat.my_chanclients--;
3318 if (server->server_type == SILC_ROUTER) {
3319 server->stat.cell_chanclients--;
3320 server->stat.chanclients--;
3323 /* If there is not at least one local user on the channel then we don't
3324 need the channel entry anymore, we can remove it safely, unless the
3325 channel is permanent channel */
3326 if (server->server_type == SILC_SERVER &&
3327 !silc_server_channel_has_local(channel)) {
3328 /* Notify about leaving client if this channel has global users. */
3329 if (notify && channel->global_users)
3330 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3331 SILC_NOTIFY_TYPE_SIGNOFF,
3332 signoff_message ? 2 : 1,
3333 clidp->data, silc_buffer_len(clidp),
3334 signoff_message, signoff_message ?
3335 strlen(signoff_message) : 0);
3337 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3338 silc_server_channel_delete(server, channel);
3342 /* Send notify to channel about client leaving SILC and channel too */
3344 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3345 SILC_NOTIFY_TYPE_SIGNOFF,
3346 signoff_message ? 2 : 1,
3347 clidp->data, silc_buffer_len(clidp),
3348 signoff_message, signoff_message ?
3349 strlen(signoff_message) : 0);
3351 if (killed && clidp) {
3352 /* Remove the client from channel's invite list */
3353 if (channel->invite_list &&
3354 silc_hash_table_count(channel->invite_list)) {
3356 SilcArgumentPayload iargs;
3357 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3358 silc_buffer_len(clidp), 3);
3359 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3360 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3361 silc_buffer_free(ab);
3362 silc_argument_payload_free(iargs);
3366 /* Don't create keys if we are shutting down */
3367 if (server->server_shutdown)
3370 /* Re-generate channel key if needed */
3371 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3372 if (!silc_server_create_channel_key(server, channel, 0))
3375 /* Send the channel key to the channel. The key of course is not sent
3376 to the client who was removed from the channel. */
3377 silc_server_send_channel_key(server, client->connection, channel,
3378 server->server_type == SILC_ROUTER ?
3379 FALSE : !server->standalone);
3383 silc_hash_table_list_reset(&htl);
3385 silc_buffer_free(clidp);
3388 /* Removes client from one channel. This is used for example when client
3389 calls LEAVE command to remove itself from the channel. Returns TRUE
3390 if channel still exists and FALSE if the channel is removed when
3391 last client leaves the channel. If `notify' is FALSE notify messages
3394 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3395 SilcPacketStream sock,
3396 SilcChannelEntry channel,
3397 SilcClientEntry client,
3400 SilcChannelClientEntry chl;
3403 SILC_LOG_DEBUG(("Removing %s from channel %s",
3404 silc_id_render(client->id, SILC_ID_CLIENT),
3405 channel->channel_name));
3407 /* Get the entry to the channel, if this client is not on the channel
3409 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3412 /* Remove channel if this is last client leaving the channel, unless
3413 the channel is permanent. */
3414 if (server->server_type != SILC_SERVER &&
3415 silc_hash_table_count(channel->user_list) < 2) {
3416 silc_server_channel_delete(server, channel);
3420 silc_hash_table_del(client->channels, channel);
3421 silc_hash_table_del(channel->user_list, client);
3422 channel->user_count--;
3424 /* If there is no global users on the channel anymore mark the channel
3425 as local channel. Do not check if the client is local client. */
3426 if (server->server_type == SILC_SERVER && channel->global_users &&
3427 chl->client->router && !silc_server_channel_has_global(channel))
3428 channel->global_users = FALSE;
3430 memset(chl, 'O', sizeof(*chl));
3433 /* Update statistics */
3434 if (SILC_IS_LOCAL(client))
3435 server->stat.my_chanclients--;
3436 if (server->server_type == SILC_ROUTER) {
3437 server->stat.cell_chanclients--;
3438 server->stat.chanclients--;
3441 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3445 /* If there is not at least one local user on the channel then we don't
3446 need the channel entry anymore, we can remove it safely, unless the
3447 channel is permanent channel */
3448 if (server->server_type == SILC_SERVER &&
3449 !silc_server_channel_has_local(channel)) {
3450 /* Notify about leaving client if this channel has global users. */
3451 if (notify && channel->global_users)
3452 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3453 SILC_NOTIFY_TYPE_LEAVE, 1,
3454 clidp->data, silc_buffer_len(clidp));
3456 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3457 silc_server_channel_delete(server, channel);
3458 silc_buffer_free(clidp);
3462 /* Send notify to channel about client leaving the channel */
3464 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3465 SILC_NOTIFY_TYPE_LEAVE, 1,
3466 clidp->data, silc_buffer_len(clidp));
3468 silc_buffer_free(clidp);
3472 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3473 function may be used only by router. In real SILC network all channels
3474 are created by routers thus this function is never used by normal
3477 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3478 SilcServerID *router_id,
3484 SilcChannelID *channel_id;
3485 SilcChannelEntry entry;
3486 SilcCipher send_key, receive_key;
3489 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3492 cipher = SILC_DEFAULT_CIPHER;
3494 hmac = SILC_DEFAULT_HMAC;
3496 /* Allocate cipher */
3497 if (!silc_cipher_alloc(cipher, &send_key))
3499 if (!silc_cipher_alloc(cipher, &receive_key)) {
3500 silc_cipher_free(send_key);
3505 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3506 silc_cipher_free(send_key);
3507 silc_cipher_free(receive_key);
3511 channel_name = strdup(channel_name);
3513 /* Create the channel ID */
3514 if (!silc_id_create_channel_id(server, router_id, server->rng,
3516 silc_free(channel_name);
3517 silc_cipher_free(send_key);
3518 silc_cipher_free(receive_key);
3519 silc_hmac_free(newhmac);
3523 /* Create the channel */
3524 entry = silc_idlist_add_channel(server->local_list, channel_name,
3525 SILC_CHANNEL_MODE_NONE, channel_id,
3526 NULL, send_key, receive_key, newhmac);
3528 silc_free(channel_name);
3529 silc_cipher_free(send_key);
3530 silc_cipher_free(receive_key);
3531 silc_hmac_free(newhmac);
3532 silc_free(channel_id);
3536 entry->cipher = strdup(cipher);
3537 entry->hmac_name = strdup(hmac);
3539 /* Now create the actual key material */
3540 if (!silc_server_create_channel_key(server, entry,
3541 silc_cipher_get_key_len(send_key) / 8)) {
3542 silc_idlist_del_channel(server->local_list, entry);
3546 /* Notify other routers about the new channel. We send the packet
3547 to our primary route. */
3549 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3550 channel_name, entry->id,
3551 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3554 /* Distribute to backup routers */
3555 if (broadcast && server->server_type == SILC_ROUTER) {
3557 unsigned char cid[32];
3558 SilcUInt32 name_len = strlen(channel_name);
3561 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3562 packet = silc_channel_payload_encode(channel_name, name_len,
3563 cid, id_len, entry->mode);
3564 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3565 packet->data, silc_buffer_len(packet), FALSE,
3567 silc_buffer_free(packet);
3570 server->stat.my_channels++;
3571 if (server->server_type == SILC_ROUTER) {
3572 server->stat.channels++;
3573 server->stat.cell_channels++;
3574 entry->users_resolved = TRUE;
3580 /* Same as above but creates the channel with Channel ID `channel_id. */
3583 silc_server_create_new_channel_with_id(SilcServer server,
3587 SilcChannelID *channel_id,
3590 SilcChannelEntry entry;
3591 SilcCipher send_key, receive_key;
3594 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3597 cipher = SILC_DEFAULT_CIPHER;
3599 hmac = SILC_DEFAULT_HMAC;
3601 /* Allocate cipher */
3602 if (!silc_cipher_alloc(cipher, &send_key))
3604 if (!silc_cipher_alloc(cipher, &receive_key)) {
3605 silc_cipher_free(send_key);
3610 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3611 silc_cipher_free(send_key);
3612 silc_cipher_free(receive_key);
3616 channel_name = strdup(channel_name);
3618 /* Create the channel */
3619 entry = silc_idlist_add_channel(server->local_list, channel_name,
3620 SILC_CHANNEL_MODE_NONE, channel_id,
3621 NULL, send_key, receive_key, newhmac);
3623 silc_cipher_free(send_key);
3624 silc_cipher_free(receive_key);
3625 silc_hmac_free(newhmac);
3626 silc_free(channel_name);
3630 /* Now create the actual key material */
3631 if (!silc_server_create_channel_key(server, entry,
3632 silc_cipher_get_key_len(send_key) / 8)) {
3633 silc_idlist_del_channel(server->local_list, entry);
3637 /* Notify other routers about the new channel. We send the packet
3638 to our primary route. */
3640 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3641 channel_name, entry->id,
3642 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3645 /* Distribute to backup routers */
3646 if (broadcast && server->server_type == SILC_ROUTER) {
3648 unsigned char cid[32];
3649 SilcUInt32 name_len = strlen(channel_name);
3652 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3653 packet = silc_channel_payload_encode(channel_name, name_len,
3654 cid, id_len, entry->mode);
3655 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3656 packet->data, silc_buffer_len(packet), FALSE,
3658 silc_buffer_free(packet);
3661 server->stat.my_channels++;
3662 if (server->server_type == SILC_ROUTER) {
3663 server->stat.channels++;
3664 server->stat.cell_channels++;
3665 entry->users_resolved = TRUE;
3671 /* Channel's key re-key timeout callback. */
3673 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3675 SilcServer server = app_context;
3676 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3680 /* Return now if we are shutting down */
3681 if (server->server_shutdown)
3684 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3687 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3690 /* Generates new channel key. This is used to create the initial channel key
3691 but also to re-generate new key for channel. If `key_len' is provided
3692 it is the bytes of the key length. */
3694 SilcBool silc_server_create_channel_key(SilcServer server,
3695 SilcChannelEntry channel,
3699 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3702 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3703 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3707 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3709 if (!channel->send_key)
3710 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3711 channel->send_key = NULL;
3714 if (!channel->receive_key)
3715 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3716 silc_cipher_free(channel->send_key);
3717 channel->send_key = channel->receive_key = NULL;
3723 else if (channel->key_len)
3724 len = channel->key_len / 8;
3726 len = silc_cipher_get_key_len(channel->send_key) / 8;
3728 /* Create channel key */
3729 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3732 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3733 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3735 /* Remove old key if exists */
3737 memset(channel->key, 0, channel->key_len / 8);
3738 silc_free(channel->key);
3742 channel->key_len = len * 8;
3743 channel->key = silc_memdup(channel_key, len);
3744 memset(channel_key, 0, sizeof(channel_key));
3746 /* Generate HMAC key from the channel key data and set it */
3748 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3749 memset(channel->key, 0, channel->key_len / 8);
3750 silc_free(channel->key);
3751 silc_cipher_free(channel->send_key);
3752 silc_cipher_free(channel->receive_key);
3753 channel->send_key = channel->receive_key = NULL;
3756 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3757 silc_hmac_set_key(channel->hmac, hash,
3758 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3759 memset(hash, 0, sizeof(hash));
3761 if (server->server_type == SILC_ROUTER) {
3762 if (!channel->rekey)
3763 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3764 channel->rekey->channel = channel;
3765 channel->rekey->key_len = key_len;
3766 if (channel->rekey->task)
3767 silc_schedule_task_del(server->schedule, channel->rekey->task);
3769 channel->rekey->task =
3770 silc_schedule_task_add_timeout(server->schedule,
3771 silc_server_channel_key_rekey,
3772 (void *)channel->rekey,
3773 server->config->channel_rekey_secs, 0);
3779 /* Saves the channel key found in the encoded `key_payload' buffer. This
3780 function is used when we receive Channel Key Payload and also when we're
3781 processing JOIN command reply. Returns entry to the channel. */
3783 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3784 SilcBuffer key_payload,
3785 SilcChannelEntry channel)
3787 SilcChannelKeyPayload payload = NULL;
3789 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3793 /* Decode channel key payload */
3794 payload = silc_channel_key_payload_parse(key_payload->data,
3795 silc_buffer_len(key_payload));
3797 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3802 /* Get the channel entry */
3805 /* Get channel ID */
3806 tmp = silc_channel_key_get_id(payload, &tmp_len);
3807 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3812 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3814 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3816 if (server->server_type == SILC_ROUTER)
3817 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3818 silc_id_render(&id, SILC_ID_CHANNEL)));
3824 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3826 tmp = silc_channel_key_get_key(payload, &tmp_len);
3832 cipher = silc_channel_key_get_cipher(payload, NULL);
3838 /* Remove old key if exists */
3840 memset(channel->key, 0, channel->key_len / 8);
3841 silc_free(channel->key);
3842 silc_cipher_free(channel->send_key);
3843 silc_cipher_free(channel->receive_key);
3846 /* Create new cipher */
3847 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3848 channel->send_key = NULL;
3852 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3853 silc_cipher_free(channel->send_key);
3854 channel->send_key = channel->receive_key = NULL;
3859 if (channel->cipher)
3860 silc_free(channel->cipher);
3861 channel->cipher = strdup(cipher);
3864 channel->key_len = tmp_len * 8;
3865 channel->key = silc_memdup(tmp, tmp_len);
3866 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3867 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3869 /* Generate HMAC key from the channel key data and set it */
3871 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3872 memset(channel->key, 0, channel->key_len / 8);
3873 silc_free(channel->key);
3874 silc_cipher_free(channel->send_key);
3875 silc_cipher_free(channel->receive_key);
3876 channel->send_key = channel->receive_key = NULL;
3879 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3880 silc_hmac_set_key(channel->hmac, hash,
3881 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3883 memset(hash, 0, sizeof(hash));
3884 memset(tmp, 0, tmp_len);
3886 if (server->server_type == SILC_ROUTER) {
3887 if (!channel->rekey)
3888 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3889 channel->rekey->channel = channel;
3890 if (channel->rekey->task)
3891 silc_schedule_task_del(server->schedule, channel->rekey->task);
3893 channel->rekey->task =
3894 silc_schedule_task_add_timeout(server->schedule,
3895 silc_server_channel_key_rekey,
3896 (void *)channel->rekey,
3897 server->config->channel_rekey_secs, 0);
3902 silc_channel_key_payload_free(payload);
3907 /* Returns assembled of all servers in the given ID list. The packet's
3908 form is dictated by the New ID payload. */
3910 static void silc_server_announce_get_servers(SilcServer server,
3911 SilcServerEntry remote,
3913 SilcBuffer *servers,
3914 unsigned long creation_time)
3917 SilcIDCacheEntry id_cache;
3918 SilcServerEntry entry;
3921 /* Go through all clients in the list */
3922 if (silc_idcache_get_all(id_list->servers, &list)) {
3923 silc_list_start(list);
3924 while ((id_cache = silc_list_get(list))) {
3925 entry = (SilcServerEntry)id_cache->context;
3927 /* Do not announce the one we've sending our announcements and
3928 do not announce ourself. Also check the creation time if it's
3930 if ((entry == remote) || (entry == server->id_entry) ||
3931 (creation_time && entry->data.created < creation_time))
3934 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3936 *servers = silc_buffer_realloc(*servers,
3938 silc_buffer_truelen((*servers)) +
3939 silc_buffer_len(idp) :
3940 silc_buffer_len(idp)));
3941 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3942 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
3943 silc_buffer_pull(*servers, silc_buffer_len(idp));
3944 silc_buffer_free(idp);
3950 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3956 p = silc_notify_payload_encode(notify, argc, ap);
3962 /* This function is used by router to announce existing servers to our
3963 primary router when we've connected to it. If `creation_time' is non-zero
3964 then only the servers that has been created after the `creation_time'
3965 will be announced. */
3967 void silc_server_announce_servers(SilcServer server, SilcBool global,
3968 unsigned long creation_time,
3969 SilcPacketStream remote)
3971 SilcBuffer servers = NULL;
3973 SILC_LOG_DEBUG(("Announcing servers"));
3975 /* Get servers in local list */
3976 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3977 server->local_list, &servers,
3981 /* Get servers in global list */
3982 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
3983 server->global_list, &servers,
3987 silc_buffer_push(servers, servers->data - servers->head);
3988 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
3990 /* Send the packet */
3991 silc_server_packet_send(server, remote,
3992 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3993 servers->data, silc_buffer_len(servers));
3995 silc_buffer_free(servers);
3999 /* Returns assembled packet of all clients in the given ID list. The
4000 packet's form is dictated by the New ID Payload. */
4002 static void silc_server_announce_get_clients(SilcServer server,
4004 SilcBuffer *clients,
4006 unsigned long creation_time)
4009 SilcIDCacheEntry id_cache;
4010 SilcClientEntry client;
4013 unsigned char mode[4];
4015 /* Go through all clients in the list */
4016 if (silc_idcache_get_all(id_list->clients, &list)) {
4017 silc_list_start(list);
4018 while ((id_cache = silc_list_get(list))) {
4019 client = (SilcClientEntry)id_cache->context;
4021 if (creation_time && client->data.created < creation_time)
4023 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4025 if (!client->connection && !client->router)
4028 SILC_LOG_DEBUG(("Announce Client ID %s",
4029 silc_id_render(client->id, SILC_ID_CLIENT)));
4031 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4033 *clients = silc_buffer_realloc(*clients,
4035 silc_buffer_truelen((*clients)) +
4036 silc_buffer_len(idp) :
4037 silc_buffer_len(idp)));
4038 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4039 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4040 silc_buffer_pull(*clients, silc_buffer_len(idp));
4042 SILC_PUT32_MSB(client->mode, mode);
4044 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4045 2, idp->data, silc_buffer_len(idp),
4047 *umodes = silc_buffer_realloc(*umodes,
4049 silc_buffer_truelen((*umodes)) +
4050 silc_buffer_len(tmp) :
4051 silc_buffer_len(tmp)));
4052 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4053 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4054 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4055 silc_buffer_free(tmp);
4057 silc_buffer_free(idp);
4062 /* This function is used to announce our existing clients to our router
4063 when we've connected to it. If `creation_time' is non-zero then only
4064 the clients that has been created after the `creation_time' will be
4067 void silc_server_announce_clients(SilcServer server,
4068 unsigned long creation_time,
4069 SilcPacketStream remote)
4071 SilcBuffer clients = NULL;
4072 SilcBuffer umodes = NULL;
4074 SILC_LOG_DEBUG(("Announcing clients"));
4076 /* Get clients in local list */
4077 silc_server_announce_get_clients(server, server->local_list,
4078 &clients, &umodes, creation_time);
4080 /* As router we announce our global list as well */
4081 if (server->server_type == SILC_ROUTER)
4082 silc_server_announce_get_clients(server, server->global_list,
4083 &clients, &umodes, creation_time);
4086 silc_buffer_push(clients, clients->data - clients->head);
4087 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4089 /* Send the packet */
4090 silc_server_packet_send(server, remote,
4091 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4092 clients->data, silc_buffer_len(clients));
4094 silc_buffer_free(clients);
4098 silc_buffer_push(umodes, umodes->data - umodes->head);
4099 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4101 /* Send the packet */
4102 silc_server_packet_send(server, remote,
4103 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4104 umodes->data, silc_buffer_len(umodes));
4106 silc_buffer_free(umodes);
4110 /* Returns channel's topic for announcing it */
4112 void silc_server_announce_get_channel_topic(SilcServer server,
4113 SilcChannelEntry channel,
4118 if (channel->topic) {
4119 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4120 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4122 silc_buffer_len(chidp),
4124 strlen(channel->topic));
4125 silc_buffer_free(chidp);
4129 /* Returns channel's invite and ban lists */
4131 void silc_server_announce_get_inviteban(SilcServer server,
4132 SilcChannelEntry channel,
4136 SilcBuffer list, idp, idp2, tmp2;
4138 SilcHashTableList htl;
4139 const unsigned char a[1] = { 0x03 };
4141 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4143 /* Encode invite list */
4144 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4145 list = silc_buffer_alloc_size(2);
4146 type = silc_hash_table_count(channel->invite_list);
4147 SILC_PUT16_MSB(type, list->data);
4148 silc_hash_table_list(channel->invite_list, &htl);
4149 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4150 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4152 silc_hash_table_list_reset(&htl);
4154 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4156 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4157 idp->data, silc_buffer_len(idp),
4158 channel->channel_name,
4159 strlen(channel->channel_name),
4160 idp2->data, silc_buffer_len(idp2),
4162 list->data, silc_buffer_len(list));
4163 silc_buffer_free(idp2);
4164 silc_buffer_free(list);
4167 /* Encode ban list */
4168 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4169 list = silc_buffer_alloc_size(2);
4170 type = silc_hash_table_count(channel->ban_list);
4171 SILC_PUT16_MSB(type, list->data);
4172 silc_hash_table_list(channel->ban_list, &htl);
4173 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2))
4174 list = silc_argument_payload_encode_one(list, tmp2->data, silc_buffer_len(tmp2),
4176 silc_hash_table_list_reset(&htl);
4179 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4180 idp->data, silc_buffer_len(idp),
4182 list->data, silc_buffer_len(list));
4183 silc_buffer_free(list);
4186 silc_buffer_free(idp);
4189 /* Returns assembled packets for channel users of the `channel'. */
4191 void silc_server_announce_get_channel_users(SilcServer server,
4192 SilcChannelEntry channel,
4193 SilcBuffer *channel_modes,
4194 SilcBuffer *channel_users,
4195 SilcBuffer *channel_users_modes)
4197 SilcChannelClientEntry chl;
4198 SilcHashTableList htl;
4199 SilcBuffer chidp, clidp, csidp;
4200 SilcBuffer tmp, fkey = NULL, chpklist;
4202 unsigned char mode[4], ulimit[4];
4205 SILC_LOG_DEBUG(("Start"));
4207 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4208 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4209 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4212 SILC_PUT32_MSB(channel->mode, mode);
4213 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4214 SILC_PUT32_MSB(channel->user_limit, ulimit);
4215 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4216 if (channel->founder_key)
4217 fkey = silc_public_key_payload_encode(channel->founder_key);
4219 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4221 silc_buffer_len(csidp),
4224 hmac, hmac ? strlen(hmac) : 0,
4225 channel->passphrase,
4226 channel->passphrase ?
4227 strlen(channel->passphrase) : 0,
4228 fkey ? fkey->data : NULL,
4229 fkey ? silc_buffer_len(fkey) : 0,
4230 chpklist ? chpklist->data : NULL,
4232 silc_buffer_len(chpklist) : 0,
4234 SILC_CHANNEL_MODE_ULIMIT ?
4237 SILC_CHANNEL_MODE_ULIMIT ?
4238 sizeof(ulimit) : 0));
4239 len = silc_buffer_len(tmp);
4241 silc_buffer_realloc(*channel_modes,
4243 silc_buffer_truelen((*channel_modes)) + len : len));
4244 silc_buffer_pull_tail(*channel_modes,
4245 ((*channel_modes)->end -
4246 (*channel_modes)->data));
4247 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4248 silc_buffer_pull(*channel_modes, len);
4249 silc_buffer_free(tmp);
4250 silc_buffer_free(fkey);
4253 /* Now find all users on the channel */
4254 silc_hash_table_list(channel->user_list, &htl);
4255 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4256 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4258 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4262 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4264 silc_buffer_len(clidp),
4266 silc_buffer_len(chidp));
4267 len = silc_buffer_len(tmp);
4269 silc_buffer_realloc(*channel_users,
4271 silc_buffer_truelen((*channel_users)) + len : len));
4272 silc_buffer_pull_tail(*channel_users,
4273 ((*channel_users)->end -
4274 (*channel_users)->data));
4276 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4277 silc_buffer_pull(*channel_users, len);
4278 silc_buffer_free(tmp);
4280 /* CUMODE notify for mode change on the channel */
4281 SILC_PUT32_MSB(chl->mode, mode);
4282 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4283 fkey = silc_public_key_payload_encode(channel->founder_key);
4284 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4286 silc_buffer_len(csidp),
4289 silc_buffer_len(clidp),
4290 fkey ? fkey->data : NULL,
4291 fkey ? silc_buffer_len(fkey) : 0);
4292 len = silc_buffer_len(tmp);
4293 *channel_users_modes =
4294 silc_buffer_realloc(*channel_users_modes,
4295 (*channel_users_modes ?
4296 silc_buffer_truelen((*channel_users_modes)) +
4298 silc_buffer_pull_tail(*channel_users_modes,
4299 ((*channel_users_modes)->end -
4300 (*channel_users_modes)->data));
4302 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4303 silc_buffer_pull(*channel_users_modes, len);
4304 silc_buffer_free(tmp);
4305 silc_buffer_free(fkey);
4307 silc_buffer_free(clidp);
4309 silc_hash_table_list_reset(&htl);
4310 silc_buffer_free(chidp);
4311 silc_buffer_free(csidp);
4314 /* Returns assembled packets for all channels and users on those channels
4315 from the given ID List. The packets are in the form dictated by the
4316 New Channel and New Channel User payloads. */
4318 void silc_server_announce_get_channels(SilcServer server,
4320 SilcBuffer *channels,
4321 SilcBuffer **channel_modes,
4322 SilcBuffer *channel_users,
4323 SilcBuffer **channel_users_modes,
4324 SilcUInt32 *channel_users_modes_c,
4325 SilcBuffer **channel_topics,
4326 SilcBuffer **channel_invites,
4327 SilcBuffer **channel_bans,
4328 SilcChannelID ***channel_ids,
4329 unsigned long creation_time)
4332 SilcIDCacheEntry id_cache;
4333 SilcChannelEntry channel;
4334 unsigned char cid[32];
4336 SilcUInt16 name_len;
4338 int i = *channel_users_modes_c;
4341 SILC_LOG_DEBUG(("Start"));
4343 /* Go through all channels in the list */
4344 if (silc_idcache_get_all(id_list->channels, &list)) {
4345 silc_list_start(list);
4346 while ((id_cache = silc_list_get(list))) {
4347 channel = (SilcChannelEntry)id_cache->context;
4349 if (creation_time && channel->created < creation_time)
4354 SILC_LOG_DEBUG(("Announce Channel ID %s",
4355 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4357 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4358 name_len = strlen(channel->channel_name);
4361 len = 4 + name_len + id_len + 4;
4363 silc_buffer_realloc(*channels,
4365 silc_buffer_truelen((*channels)) +
4367 silc_buffer_pull_tail(*channels,
4368 ((*channels)->end - (*channels)->data));
4369 silc_buffer_format(*channels,
4370 SILC_STR_UI_SHORT(name_len),
4371 SILC_STR_UI_XNSTRING(channel->channel_name,
4373 SILC_STR_UI_SHORT(id_len),
4374 SILC_STR_UI_XNSTRING(cid, id_len),
4375 SILC_STR_UI_INT(channel->mode),
4377 silc_buffer_pull(*channels, len);
4380 if (creation_time && channel->updated < creation_time)
4386 /* Channel user modes */
4387 *channel_users_modes = silc_realloc(*channel_users_modes,
4388 sizeof(**channel_users_modes) *
4390 (*channel_users_modes)[i] = NULL;
4391 *channel_modes = silc_realloc(*channel_modes,
4392 sizeof(**channel_modes) * (i + 1));
4393 (*channel_modes)[i] = NULL;
4394 *channel_ids = silc_realloc(*channel_ids,
4395 sizeof(**channel_ids) * (i + 1));
4396 (*channel_ids)[i] = NULL;
4397 silc_server_announce_get_channel_users(server, channel,
4398 &(*channel_modes)[i],
4400 &(*channel_users_modes)[i]);
4401 (*channel_ids)[i] = channel->id;
4403 /* Channel's topic */
4404 *channel_topics = silc_realloc(*channel_topics,
4405 sizeof(**channel_topics) * (i + 1));
4406 (*channel_topics)[i] = NULL;
4407 silc_server_announce_get_channel_topic(server, channel,
4408 &(*channel_topics)[i]);
4410 /* Channel's invite and ban list */
4411 *channel_invites = silc_realloc(*channel_invites,
4412 sizeof(**channel_invites) * (i + 1));
4413 (*channel_invites)[i] = NULL;
4414 *channel_bans = silc_realloc(*channel_bans,
4415 sizeof(**channel_bans) * (i + 1));
4416 (*channel_bans)[i] = NULL;
4417 silc_server_announce_get_inviteban(server, channel,
4418 &(*channel_invites)[i],
4419 &(*channel_bans)[i]);
4421 (*channel_users_modes_c)++;
4429 /* This function is used to announce our existing channels to our router
4430 when we've connected to it. This also announces the users on the
4431 channels to the router. If the `creation_time' is non-zero only the
4432 channels that was created after the `creation_time' are announced.
4433 Note that the channel users are still announced even if the `creation_time'
4436 void silc_server_announce_channels(SilcServer server,
4437 unsigned long creation_time,
4438 SilcPacketStream remote)
4440 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4441 SilcBuffer *channel_users_modes = NULL;
4442 SilcBuffer *channel_topics = NULL;
4443 SilcBuffer *channel_invites = NULL;
4444 SilcBuffer *channel_bans = NULL;
4445 SilcUInt32 channel_users_modes_c = 0;
4446 SilcChannelID **channel_ids = NULL;
4448 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4450 /* Get channels and channel users in local list */
4451 silc_server_announce_get_channels(server, server->local_list,
4452 &channels, &channel_modes,
4454 &channel_users_modes,
4455 &channel_users_modes_c,
4459 &channel_ids, creation_time);
4461 /* Get channels and channel users in global list */
4462 if (server->server_type != SILC_SERVER)
4463 silc_server_announce_get_channels(server, server->global_list,
4464 &channels, &channel_modes,
4466 &channel_users_modes,
4467 &channel_users_modes_c,
4471 &channel_ids, creation_time);
4474 silc_buffer_push(channels, channels->data - channels->head);
4475 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4477 /* Send the packet */
4478 silc_server_packet_send(server, remote,
4479 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4480 channels->data, silc_buffer_len(channels));
4482 silc_buffer_free(channels);
4485 if (channel_users) {
4486 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4487 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4488 silc_buffer_len(channel_users));
4490 /* Send the packet */
4491 silc_server_packet_send(server, remote,
4492 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4493 channel_users->data, silc_buffer_len(channel_users));
4495 silc_buffer_free(channel_users);
4498 if (channel_modes) {
4501 for (i = 0; i < channel_users_modes_c; i++) {
4502 if (!channel_modes[i])
4504 silc_buffer_push(channel_modes[i],
4505 channel_modes[i]->data -
4506 channel_modes[i]->head);
4507 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4508 silc_buffer_len(channel_modes[i]));
4509 silc_server_packet_send_dest(server, remote,
4510 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4511 channel_ids[i], SILC_ID_CHANNEL,
4512 channel_modes[i]->data,
4513 silc_buffer_len(channel_modes[i]));
4514 silc_buffer_free(channel_modes[i]);
4516 silc_free(channel_modes);
4519 if (channel_users_modes) {
4522 for (i = 0; i < channel_users_modes_c; i++) {
4523 if (!channel_users_modes[i])
4525 silc_buffer_push(channel_users_modes[i],
4526 channel_users_modes[i]->data -
4527 channel_users_modes[i]->head);
4528 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4529 silc_buffer_len(channel_users_modes[i]));
4530 silc_server_packet_send_dest(server, remote,
4531 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4532 channel_ids[i], SILC_ID_CHANNEL,
4533 channel_users_modes[i]->data,
4534 silc_buffer_len(channel_users_modes[i]));
4535 silc_buffer_free(channel_users_modes[i]);
4537 silc_free(channel_users_modes);
4540 if (channel_topics) {
4543 for (i = 0; i < channel_users_modes_c; i++) {
4544 if (!channel_topics[i])
4547 silc_buffer_push(channel_topics[i],
4548 channel_topics[i]->data -
4549 channel_topics[i]->head);
4550 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4551 silc_buffer_len(channel_topics[i]));
4552 silc_server_packet_send_dest(server, remote,
4553 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4554 channel_ids[i], SILC_ID_CHANNEL,
4555 channel_topics[i]->data,
4556 silc_buffer_len(channel_topics[i]));
4557 silc_buffer_free(channel_topics[i]);
4559 silc_free(channel_topics);
4562 if (channel_invites) {
4565 for (i = 0; i < channel_users_modes_c; i++) {
4566 if (!channel_invites[i])
4569 silc_buffer_push(channel_invites[i],
4570 channel_invites[i]->data -
4571 channel_invites[i]->head);
4572 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4573 silc_buffer_len(channel_invites[i]));
4574 silc_server_packet_send_dest(server, remote,
4575 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4576 channel_ids[i], SILC_ID_CHANNEL,
4577 channel_invites[i]->data,
4578 silc_buffer_len(channel_invites[i]));
4579 silc_buffer_free(channel_invites[i]);
4581 silc_free(channel_invites);
4587 for (i = 0; i < channel_users_modes_c; i++) {
4588 if (!channel_bans[i])
4591 silc_buffer_push(channel_bans[i],
4592 channel_bans[i]->data -
4593 channel_bans[i]->head);
4594 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4595 silc_buffer_len(channel_bans[i]));
4596 silc_server_packet_send_dest(server, remote,
4597 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4598 channel_ids[i], SILC_ID_CHANNEL,
4599 channel_bans[i]->data,
4600 silc_buffer_len(channel_bans[i]));
4601 silc_buffer_free(channel_bans[i]);
4603 silc_free(channel_bans);
4606 silc_free(channel_ids);
4609 /* Announces WATCH list. */
4611 void silc_server_announce_watches(SilcServer server,
4612 SilcPacketStream remote)
4614 SilcHashTableList htl;
4615 SilcBuffer buffer, idp, args, pkp;
4616 SilcClientEntry client;
4619 SILC_LOG_DEBUG(("Announcing watch list"));
4621 /* XXX because way we save the nicks (hash) we cannot announce them. */
4623 /* XXX we should send all public keys in one command if client is
4624 watching more than one key */
4625 silc_hash_table_list(server->watcher_list_pk, &htl);
4626 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4627 if (!client || !client->id)
4630 server->stat.commands_sent++;
4632 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4633 args = silc_buffer_alloc_size(2);
4634 silc_buffer_format(args,
4635 SILC_STR_UI_SHORT(1),
4637 pkp = silc_public_key_payload_encode(key);
4638 args = silc_argument_payload_encode_one(args, pkp->data,
4639 silc_buffer_len(pkp), 0x00);
4640 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4641 ++server->cmd_ident, 2,
4642 1, idp->data, silc_buffer_len(idp),
4644 silc_buffer_len(args));
4647 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4648 buffer->data, silc_buffer_len(buffer));
4650 silc_buffer_free(pkp);
4651 silc_buffer_free(args);
4652 silc_buffer_free(idp);
4653 silc_buffer_free(buffer);
4655 silc_hash_table_list_reset(&htl);
4658 /* Assembles user list and users mode list from the `channel'. */
4660 SilcBool silc_server_get_users_on_channel(SilcServer server,
4661 SilcChannelEntry channel,
4662 SilcBuffer *user_list,
4663 SilcBuffer *mode_list,
4664 SilcUInt32 *user_count)
4666 SilcChannelClientEntry chl;
4667 SilcHashTableList htl;
4668 SilcBuffer client_id_list;
4669 SilcBuffer client_mode_list;
4671 SilcUInt32 list_count = 0, len = 0;
4673 if (!silc_hash_table_count(channel->user_list))
4676 silc_hash_table_list(channel->user_list, &htl);
4677 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4678 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4679 silc_hash_table_list_reset(&htl);
4681 client_id_list = silc_buffer_alloc(len);
4683 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4684 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4685 silc_buffer_pull_tail(client_mode_list,
4686 silc_buffer_truelen(client_mode_list));
4688 silc_hash_table_list(channel->user_list, &htl);
4689 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4691 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4692 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4693 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4694 silc_buffer_free(idp);
4696 /* Client's mode on channel */
4697 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4698 silc_buffer_pull(client_mode_list, 4);
4702 silc_hash_table_list_reset(&htl);
4703 silc_buffer_push(client_id_list,
4704 client_id_list->data - client_id_list->head);
4705 silc_buffer_push(client_mode_list,
4706 client_mode_list->data - client_mode_list->head);
4708 *user_list = client_id_list;
4709 *mode_list = client_mode_list;
4710 *user_count = list_count;
4714 /* Saves users and their modes to the `channel'. */
4716 void silc_server_save_users_on_channel(SilcServer server,
4717 SilcPacketStream sock,
4718 SilcChannelEntry channel,
4719 SilcClientID *noadd,
4720 SilcBuffer user_list,
4721 SilcBuffer mode_list,
4722 SilcUInt32 user_count)
4728 SilcClientEntry client;
4729 SilcIDCacheEntry cache;
4730 SilcChannelClientEntry chl;
4732 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4733 channel->channel_name));
4735 for (i = 0; i < user_count; i++) {
4737 SILC_GET16_MSB(idp_len, user_list->data + 2);
4739 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4741 silc_buffer_pull(user_list, idp_len);
4744 SILC_GET32_MSB(mode, mode_list->data);
4745 silc_buffer_pull(mode_list, 4);
4747 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4752 /* Check if we have this client cached already. */
4753 client = silc_idlist_find_client_by_id(server->local_list,
4755 server->server_type, &cache);
4757 client = silc_idlist_find_client_by_id(server->global_list,
4759 server->server_type, &cache);
4761 /* If router did not find such Client ID in its lists then this must
4762 be bogus client or some router in the net is buggy. */
4763 if (server->server_type != SILC_SERVER)
4766 /* We don't have that client anywhere, add it. The client is added
4767 to global list since server didn't have it in the lists so it must be
4769 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4770 silc_id_dup(&id.u.client_id,
4772 silc_packet_get_context(sock),
4775 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4779 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4782 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4783 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4784 "%s", channel->channel_name));
4788 if (!silc_server_client_on_channel(client, channel, &chl)) {
4789 /* Client was not on the channel, add it. */
4790 chl = silc_calloc(1, sizeof(*chl));
4791 chl->client = client;
4793 chl->channel = channel;
4794 silc_hash_table_add(channel->user_list, chl->client, chl);
4795 silc_hash_table_add(client->channels, chl->channel, chl);
4796 channel->user_count++;
4804 /* Saves channels and channels user modes to the `client'. Removes
4805 the client from those channels that are not sent in the list but
4808 void silc_server_save_user_channels(SilcServer server,
4809 SilcPacketStream sock,
4810 SilcClientEntry client,
4811 SilcBuffer channels,
4812 SilcBuffer channels_user_modes)
4815 SilcUInt32 *chumodes;
4816 SilcChannelPayload entry;
4817 SilcChannelEntry channel;
4818 SilcChannelID channel_id;
4819 SilcChannelClientEntry chl;
4820 SilcHashTable ht = NULL;
4821 SilcHashTableList htl;
4825 if (!channels || !channels_user_modes ||
4826 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4829 ch = silc_channel_payload_parse_list(channels->data,
4830 silc_buffer_len(channels));
4831 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4833 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4834 NULL, NULL, NULL, TRUE);
4835 silc_dlist_start(ch);
4836 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4837 /* Check if we have this channel, and add it if we don't have it.
4838 Also add the client on the channel unless it is there already. */
4839 if (!silc_channel_get_id_parse(entry, &channel_id))
4841 channel = silc_idlist_find_channel_by_id(server->local_list,
4844 channel = silc_idlist_find_channel_by_id(server->global_list,
4847 if (server->server_type != SILC_SERVER) {
4852 /* We don't have that channel anywhere, add it. */
4853 name = silc_channel_get_name(entry, NULL);
4854 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4855 silc_id_dup(&channel_id,
4857 server->router, NULL, NULL, 0);
4864 channel->mode = silc_channel_get_mode(entry);
4866 /* Add the client on the channel */
4867 if (!silc_server_client_on_channel(client, channel, &chl)) {
4868 chl = silc_calloc(1, sizeof(*chl));
4869 chl->client = client;
4870 chl->mode = chumodes[i++];
4871 chl->channel = channel;
4872 silc_hash_table_add(channel->user_list, chl->client, chl);
4873 silc_hash_table_add(client->channels, chl->channel, chl);
4874 channel->user_count++;
4877 chl->mode = chumodes[i++];
4880 silc_hash_table_add(ht, channel, channel);
4882 silc_channel_payload_list_free(ch);
4883 silc_free(chumodes);
4887 /* Go through the list again and remove client from channels that
4888 are no part of the list. */
4890 silc_hash_table_list(client->channels, &htl);
4891 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4892 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4893 silc_hash_table_del(chl->channel->user_list, chl->client);
4894 silc_hash_table_del(chl->client->channels, chl->channel);
4898 silc_hash_table_list_reset(&htl);
4899 silc_hash_table_free(ht);
4901 silc_hash_table_list(client->channels, &htl);
4902 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4903 silc_hash_table_del(chl->channel->user_list, chl->client);
4904 silc_hash_table_del(chl->client->channels, chl->channel);
4907 silc_hash_table_list_reset(&htl);
4911 /* Lookups route to the client indicated by the `id_data'. The connection
4912 object and internal data object is returned. Returns NULL if route
4913 could not be found to the client. If the `client_id' is specified then
4914 it is used and the `id_data' is ignored. */
4917 silc_server_get_client_route(SilcServer server,
4918 unsigned char *id_data,
4920 SilcClientID *client_id,
4921 SilcIDListData *idata,
4922 SilcClientEntry *client_entry)
4924 SilcClientID *id, clid;
4925 SilcClientEntry client;
4927 SILC_LOG_DEBUG(("Start"));
4930 *client_entry = NULL;
4932 /* Decode destination Client ID */
4934 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
4936 id = silc_id_dup(&clid, SILC_ID_CLIENT);
4938 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4941 /* If the destination belongs to our server we don't have to route
4942 the packet anywhere but to send it to the local destination. */
4943 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4947 /* If we are router and the client has router then the client is in
4948 our cell but not directly connected to us. */
4949 if (server->server_type == SILC_ROUTER && client->router) {
4950 /* We are of course in this case the client's router thus the route
4951 to the client is the server who owns the client. So, we will send
4952 the packet to that server. */
4954 *idata = (SilcIDListData)client->router;
4955 return client->router->connection;
4958 /* Seems that client really is directly connected to us */
4960 *idata = (SilcIDListData)client;
4962 *client_entry = client;
4963 return client->connection;
4966 /* Destination belongs to someone not in this server. If we are normal
4967 server our action is to send the packet to our router. */
4968 if (server->server_type != SILC_ROUTER && !server->standalone) {
4971 *idata = (SilcIDListData)server->router;
4972 return SILC_PRIMARY_ROUTE(server);
4975 /* We are router and we will perform route lookup for the destination
4976 and send the packet to fastest route. */
4977 if (server->server_type == SILC_ROUTER && !server->standalone) {
4978 /* Check first that the ID is valid */
4979 client = silc_idlist_find_client_by_id(server->global_list, id,
4982 SilcPacketStream dst_sock;
4984 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4987 if (idata && dst_sock)
4988 *idata = silc_packet_get_context(dst_sock);
4997 /* Encodes and returns channel list of channels the `client' has joined.
4998 Secret channels are not put to the list. */
5000 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5001 SilcClientEntry client,
5002 SilcBool get_private,
5003 SilcBool get_secret,
5004 SilcBuffer *user_mode_list)
5006 SilcBuffer buffer = NULL;
5007 SilcChannelEntry channel;
5008 SilcChannelClientEntry chl;
5009 SilcHashTableList htl;
5010 unsigned char cid[32];
5012 SilcUInt16 name_len;
5016 *user_mode_list = NULL;
5018 silc_hash_table_list(client->channels, &htl);
5019 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5020 channel = chl->channel;
5022 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5024 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5027 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5028 name_len = strlen(channel->channel_name);
5030 len = 4 + name_len + id_len + 4;
5031 buffer = silc_buffer_realloc(buffer,
5033 silc_buffer_truelen(buffer) + len : len));
5034 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5035 silc_buffer_format(buffer,
5036 SILC_STR_UI_SHORT(name_len),
5037 SILC_STR_DATA(channel->channel_name, name_len),
5038 SILC_STR_UI_SHORT(id_len),
5039 SILC_STR_DATA(cid, id_len),
5040 SILC_STR_UI_INT(chl->channel->mode),
5042 silc_buffer_pull(buffer, len);
5044 if (user_mode_list) {
5046 silc_buffer_realloc(*user_mode_list,
5048 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5049 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5050 (*user_mode_list)->data));
5051 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5052 silc_buffer_pull(*user_mode_list, 4);
5055 silc_hash_table_list_reset(&htl);
5058 silc_buffer_push(buffer, buffer->data - buffer->head);
5059 if (user_mode_list && *user_mode_list)
5060 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5061 (*user_mode_list)->head));
5066 /* Task callback used to retrieve network statistical information from
5067 router server once in a while. */
5069 SILC_TASK_CALLBACK(silc_server_get_stats)
5071 SilcServer server = (SilcServer)context;
5072 SilcBuffer idp, packet;
5074 if (!server->standalone) {
5075 SILC_LOG_DEBUG(("Retrieving stats from router"));
5076 server->stat.commands_sent++;
5077 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5079 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5080 ++server->cmd_ident, 1,
5082 silc_buffer_len(idp));
5083 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5084 SILC_PACKET_COMMAND, 0, packet->data,
5085 silc_buffer_len(packet));
5086 silc_buffer_free(packet);
5087 silc_buffer_free(idp);
5091 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,