5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2008 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
20 #include "serverincludes.h"
21 #include "server_internal.h"
23 /************************* Types and definitions ****************************/
25 SILC_TASK_CALLBACK(silc_server_get_stats);
26 SILC_TASK_CALLBACK(silc_server_connect_router);
27 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
28 SILC_TASK_CALLBACK(silc_server_do_rekey);
29 SILC_TASK_CALLBACK(silc_server_purge_expired_clients);
30 static void silc_server_accept_new_connection(SilcNetStatus status,
33 static void silc_server_packet_parse_type(SilcServer server,
34 SilcPacketStream sock,
36 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
40 /************************ Static utility functions **************************/
42 /* SKE public key verification callback */
45 silc_server_verify_key(SilcSKE ske,
46 SilcPublicKey public_key,
48 SilcSKEVerifyCbCompletion completion,
49 void *completion_context)
51 SilcPacketStream sock = context;
52 SilcUnknownEntry entry = silc_packet_get_context(sock);
54 SILC_LOG_DEBUG(("Verifying public key"));
56 if (silc_pkcs_get_type(public_key) != SILC_SKE_PK_TYPE_SILC) {
57 SILC_LOG_WARNING(("We don't support %s (%s) port %d public key type %d",
58 entry->hostname, entry->ip, entry->port,
59 silc_pkcs_get_type(public_key)));
60 completion(ske, SILC_SKE_STATUS_UNSUPPORTED_PUBLIC_KEY,
65 /* We accept all keys without explicit verification */
66 completion(ske, SILC_SKE_STATUS_OK, completion_context);
70 /************************ Packet engine callbacks ***************************/
72 /* Packet engine callback to receive a packet */
74 static SilcBool silc_server_packet_receive(SilcPacketEngine engine,
75 SilcPacketStream stream,
77 void *callback_context,
80 SilcServer server = callback_context;
81 SilcIDListData idata = stream_context;
86 /* Packets we do not handle */
87 switch (packet->type) {
88 case SILC_PACKET_HEARTBEAT:
89 case SILC_PACKET_SUCCESS:
90 case SILC_PACKET_FAILURE:
91 case SILC_PACKET_REJECT:
92 case SILC_PACKET_KEY_EXCHANGE:
93 case SILC_PACKET_KEY_EXCHANGE_1:
94 case SILC_PACKET_KEY_EXCHANGE_2:
95 case SILC_PACKET_REKEY_DONE:
96 case SILC_PACKET_CONNECTION_AUTH:
101 /* Only specific packets can come without source ID present. */
102 if ((!packet->src_id ||
103 !(idata->status & SILC_IDLIST_STATUS_REGISTERED)) &&
104 packet->type != SILC_PACKET_NEW_CLIENT &&
105 packet->type != SILC_PACKET_NEW_SERVER &&
106 packet->type != SILC_PACKET_RESUME_CLIENT &&
107 packet->type != SILC_PACKET_CONNECTION_AUTH_REQUEST &&
108 packet->type != SILC_PACKET_DISCONNECT)
111 /* NEW_CLIENT and NEW_SERVER are accepted only without source ID and
112 for unregistered connection. */
113 if (packet->src_id && (packet->type == SILC_PACKET_NEW_CLIENT ||
114 packet->type == SILC_PACKET_NEW_SERVER) &&
115 (idata->status & SILC_IDLIST_STATUS_REGISTERED))
118 /* Ignore packets from disabled connection */
119 if (idata->status & SILC_IDLIST_STATUS_DISABLED &&
120 packet->type != SILC_PACKET_HEARTBEAT &&
121 packet->type != SILC_PACKET_RESUME_ROUTER &&
122 packet->type != SILC_PACKET_REKEY)
125 /* Check that the the current client ID is same as in the client's packet. */
126 if (idata->conn_type == SILC_CONN_CLIENT) {
127 SilcClientEntry client = (SilcClientEntry)silc_packet_get_context(stream);
128 SilcClientID client_id;
130 if (client->id && packet->src_id &&
131 silc_id_str2id(packet->src_id, packet->src_id_len,
132 packet->src_id_type, &client_id, sizeof(client_id))) {
133 if (!SILC_ID_CLIENT_COMPARE(client->id, &client_id)) {
134 SILC_LOG_DEBUG(("Packet source is not same as sender, packet %s",
135 silc_get_packet_name(packet->type)));
141 if (server->server_type == SILC_ROUTER) {
142 /* Route the packet if it is not destined to us. Other ID types but
143 server are handled separately after processing them. */
144 if (packet->dst_id &&
145 !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
146 packet->dst_id_type == SILC_ID_SERVER &&
147 idata->conn_type != SILC_CONN_CLIENT &&
148 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
149 SilcPacketStream conn;
150 SilcServerID server_id;
152 silc_id_str2id(packet->dst_id, packet->dst_id_len, packet->dst_id_type,
153 &server_id, sizeof(server_id));
155 conn = silc_server_route_get(server, &server_id, SILC_ID_SERVER);
157 SILC_LOG_WARNING(("Packet to unknown server ID %s, dropped (no route)",
158 silc_id_render(&server_id, SILC_ID_SERVER)));
162 silc_server_packet_route(server, conn, packet);
163 silc_packet_free(packet);
168 /* Broadcast packet if it is marked as broadcast packet and it is
169 originated from router and we are router. */
170 if (server->server_type == SILC_ROUTER &&
171 idata->conn_type == SILC_CONN_ROUTER &&
172 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
173 /* Broadcast to our primary route */
174 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
176 /* If we have backup routers then we need to feed all broadcast
177 data to those servers. */
178 silc_server_backup_broadcast(server, stream, packet);
182 silc_server_packet_parse_type(server, stream, packet);
187 /* Packet engine callback to indicate end of stream */
189 static void silc_server_packet_eos(SilcPacketEngine engine,
190 SilcPacketStream stream,
191 void *callback_context,
192 void *stream_context)
194 SilcServer server = callback_context;
195 SilcIDListData idata = silc_packet_get_context(stream);
197 SILC_LOG_DEBUG(("End of stream received"));
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_free_sock_user_data(server, sconn->sock, NULL);
1361 silc_server_connection_free(sconn);
1365 /* XXX For now remote is router always */
1366 entry->data.conn_type = SILC_CONN_ROUTER;
1368 SILC_LOG_INFO(("Connected to %s %s",
1369 SILC_CONNTYPE_STRING(entry->data.conn_type),
1370 sconn->remote_host));
1372 /* Create the actual entry for remote entity */
1373 switch (entry->data.conn_type) {
1374 case SILC_CONN_SERVER:
1375 SILC_LOG_DEBUG(("Remote is SILC server"));
1377 /* Add new server. The server must register itself to us before it
1378 becomes registered to SILC network. */
1379 id_entry = silc_idlist_add_server(server->local_list,
1380 strdup(sconn->remote_host),
1381 SILC_SERVER, NULL, NULL, sconn->sock);
1383 silc_server_disconnect_remote(server, sconn->sock,
1384 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1385 if (sconn->callback)
1386 (*sconn->callback)(server, NULL, sconn->callback_context);
1387 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1388 silc_server_connection_free(sconn);
1394 server->stat.my_servers++;
1395 if (server->server_type == SILC_ROUTER)
1396 server->stat.servers++;
1397 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
1399 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1402 case SILC_CONN_ROUTER:
1403 SILC_LOG_DEBUG(("Remote is SILC router"));
1405 /* Register to network */
1406 silc_id_id2str(server->id, SILC_ID_SERVER, id, sizeof(id), &id_len);
1407 if (!silc_packet_send_va(sconn->sock, SILC_PACKET_NEW_SERVER, 0,
1408 SILC_STR_UI_SHORT(id_len),
1409 SILC_STR_DATA(id, id_len),
1410 SILC_STR_UI_SHORT(strlen(server->server_name)),
1411 SILC_STR_DATA(server->server_name,
1412 strlen(server->server_name)),
1414 silc_server_disconnect_remote(server, sconn->sock,
1415 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1416 if (sconn->callback)
1417 (*sconn->callback)(server, NULL, sconn->callback_context);
1418 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1419 silc_server_connection_free(sconn);
1425 silc_packet_get_ids(sconn->sock, NULL, NULL, NULL, &remote_id);
1427 /* Check that we do not have this ID already */
1428 id_entry = silc_idlist_find_server_by_id(server->local_list,
1429 &remote_id.u.server_id,
1432 silc_idcache_del_by_context(server->local_list->servers, id_entry, NULL);
1434 id_entry = silc_idlist_find_server_by_id(server->global_list,
1435 &remote_id.u.server_id,
1438 silc_idcache_del_by_context(server->global_list->servers, id_entry,
1442 SILC_LOG_DEBUG(("New server id(%s)",
1443 silc_id_render(&remote_id.u.server_id, SILC_ID_SERVER)));
1445 /* Add the connected router to global server list. Router is sent
1446 as NULL since it's local to us. */
1447 id_entry = silc_idlist_add_server(server->global_list,
1448 strdup(sconn->remote_host),
1450 silc_id_dup(&remote_id.u.server_id,
1454 silc_server_disconnect_remote(server, sconn->sock,
1455 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1456 if (sconn->callback)
1457 (*sconn->callback)(server, NULL, sconn->callback_context);
1458 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1459 silc_server_connection_free(sconn);
1465 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
1466 idata = (SilcIDListData)id_entry;
1467 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1468 SILC_IDLIST_STATUS_LOCAL);
1469 idata->sconn = sconn;
1472 server->stat.my_routers++;
1473 if (server->server_type == SILC_ROUTER)
1474 server->stat.routers++;
1475 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
1477 if (!sconn->backup) {
1478 /* Mark this router our primary router if we're still standalone */
1479 if (server->standalone) {
1480 SILC_LOG_DEBUG(("This connection is our primary router"));
1481 server->id_entry->router = id_entry;
1482 server->router = id_entry;
1483 server->router->server_type = SILC_ROUTER;
1484 server->standalone = FALSE;
1485 server->backup_primary = FALSE;
1487 /* Announce data if we are not backup router (unless not as primary
1488 currently). Backup router announces later at the end of
1489 resuming protocol. */
1490 if (server->backup_router && server->server_type == SILC_ROUTER) {
1491 SILC_LOG_DEBUG(("Announce data after resume protocol"));
1493 /* If we are router then announce our possible servers. Backup
1494 router announces also global servers. */
1495 if (server->server_type == SILC_ROUTER)
1496 silc_server_announce_servers(server,
1497 server->backup_router ? TRUE : FALSE,
1498 0, SILC_PRIMARY_ROUTE(server));
1500 /* Announce our clients and channels to the router */
1501 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1502 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1505 /* If we are backup router then this primary router is whom we are
1507 if (server->server_type == SILC_BACKUP_ROUTER) {
1508 silc_socket_stream_get_info(silc_packet_stream_get_stream(sconn->
1510 NULL, NULL, &ip, NULL);
1511 silc_server_backup_add(server, server->id_entry, ip,
1512 sconn->remote_port, TRUE);
1516 /* We already have primary router. Disconnect this connection */
1517 SILC_LOG_DEBUG(("We already have primary router, disconnect"));
1518 silc_idlist_del_server(server->global_list, id_entry);
1519 silc_server_disconnect_remote(server, sconn->sock,
1520 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1521 if (sconn->callback)
1522 (*sconn->callback)(server, NULL, sconn->callback_context);
1523 silc_server_connection_free(sconn);
1529 /* Add this server to be our backup router */
1530 id_entry->server_type = SILC_BACKUP_ROUTER;
1531 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1532 sconn->backup_replace_port, FALSE);
1538 silc_server_disconnect_remote(server, sconn->sock,
1539 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1540 if (sconn->callback)
1541 (*sconn->callback)(server, NULL, sconn->callback_context);
1542 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1543 silc_server_connection_free(sconn);
1548 SILC_LOG_DEBUG(("Connection established, sock %p", sconn->sock));
1550 conn = sconn->conn.ref_ptr;
1551 param = &server->config->param;
1552 if (conn && conn->param)
1553 param = conn->param;
1555 /* Register rekey timeout */
1556 sconn->rekey_timeout = param->key_exchange_rekey;
1557 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
1558 sconn->sock, sconn->rekey_timeout, 0);
1560 /* Set the entry as packet stream context */
1561 silc_packet_set_context(sconn->sock, id_entry);
1563 /* Call the completion callback to indicate that we've connected to
1565 if (sconn && sconn->callback)
1566 (*sconn->callback)(server, id_entry, sconn->callback_context);
1568 if (sconn == server->router_conn)
1569 server->router_conn = NULL;
1574 /* SKE completion callback */
1576 static void silc_server_ke_completed(SilcSKE ske, SilcSKEStatus status,
1577 SilcSKESecurityProperties prop,
1578 SilcSKEKeyMaterial keymat,
1579 SilcSKERekeyMaterial rekey,
1582 SilcPacketStream sock = context;
1583 SilcUnknownEntry entry = silc_packet_get_context(sock);
1584 SilcServerConnection sconn = silc_ske_get_context(ske);
1585 SilcServer server = entry->server;
1586 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1587 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
1588 void *auth_data = NULL;
1589 SilcUInt32 auth_data_len = 0;
1590 SilcConnAuth connauth;
1591 SilcCipher send_key, receive_key;
1592 SilcHmac hmac_send, hmac_receive;
1595 SILC_LOG_DEBUG(("Connection %p, SKE completed", sconn));
1599 if (status != SILC_SKE_STATUS_OK) {
1601 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
1602 silc_ske_map_status(status), entry->hostname, entry->ip));
1604 /* XXX retry connecting */
1606 silc_server_disconnect_remote(server, sconn->sock,
1607 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1608 if (sconn->callback)
1609 (*sconn->callback)(server, NULL, sconn->callback_context);
1610 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1611 silc_server_connection_free(sconn);
1615 SILC_LOG_DEBUG(("Setting keys into use"));
1617 /* Set the keys into use. The data will be encrypted after this. */
1618 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
1619 &hmac_send, &hmac_receive, &hash)) {
1621 /* XXX retry connecting */
1623 /* Error setting keys */
1625 silc_server_disconnect_remote(server, sconn->sock,
1626 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1627 if (sconn->callback)
1628 (*sconn->callback)(server, NULL, sconn->callback_context);
1629 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1630 silc_server_connection_free(sconn);
1633 silc_packet_set_keys(sconn->sock, send_key, receive_key, hmac_send,
1634 hmac_receive, FALSE);
1636 SILC_LOG_DEBUG(("Starting connection authentication"));
1638 connauth = silc_connauth_alloc(server->schedule, ske,
1639 server->config->conn_auth_timeout);
1641 /* XXX retry connecting */
1643 /** Error allocating auth protocol */
1645 silc_server_disconnect_remote(server, sconn->sock,
1646 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
1647 if (sconn->callback)
1648 (*sconn->callback)(server, NULL, sconn->callback_context);
1649 silc_server_free_sock_user_data(server, sconn->sock, NULL);
1650 silc_server_connection_free(sconn);
1654 /* Get authentication method */
1656 if (conn->passphrase) {
1657 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1658 auth_meth = SILC_AUTH_PUBLIC_KEY;
1659 auth_data = server->private_key;
1661 auth_meth = SILC_AUTH_PASSWORD;
1662 auth_data = conn->passphrase;
1663 auth_data_len = conn->passphrase_len;
1666 auth_meth = SILC_AUTH_PUBLIC_KEY;
1667 auth_data = server->private_key;
1671 entry->data.rekey = rekey;
1673 /* Start connection authentication */
1675 silc_connauth_initiator(connauth, server->server_type == SILC_SERVER ?
1676 SILC_CONN_SERVER : SILC_CONN_ROUTER, auth_meth,
1677 auth_data, auth_data_len,
1678 silc_server_ke_auth_compl, sconn);
1681 /* Function that is called when the network connection to a router has
1682 been established. This will continue with the key exchange protocol
1683 with the remote router. */
1685 void silc_server_start_key_exchange(SilcServerConnection sconn)
1687 SilcServer server = sconn->server;
1688 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1689 SilcUnknownEntry entry;
1690 SilcSKEParamsStruct params;
1693 /* Cancel any possible retry timeouts */
1694 silc_schedule_task_del_by_context(server->schedule, sconn);
1696 /* Create packet stream */
1697 sconn->sock = silc_packet_stream_create(server->packet_engine,
1698 server->schedule, sconn->stream);
1700 SILC_LOG_ERROR(("Cannot connect: cannot create packet stream"));
1701 silc_stream_destroy(sconn->stream);
1702 if (sconn->callback)
1703 (*sconn->callback)(server, NULL, sconn->callback_context);
1704 silc_server_connection_free(sconn);
1707 server->stat.conn_num++;
1709 /* Set source ID to packet stream */
1710 if (!silc_packet_set_ids(sconn->sock, SILC_ID_SERVER, server->id,
1712 silc_packet_stream_destroy(sconn->sock);
1713 if (sconn->callback)
1714 (*sconn->callback)(server, NULL, sconn->callback_context);
1715 silc_server_connection_free(sconn);
1719 /* Create entry for remote entity */
1720 entry = silc_calloc(1, sizeof(*entry));
1722 silc_packet_stream_destroy(sconn->sock);
1723 silc_server_connection_free(sconn);
1726 entry->server = server;
1727 silc_packet_set_context(sconn->sock, entry);
1729 /* Set Key Exchange flags from configuration, but fall back to global
1731 memset(¶ms, 0, sizeof(params));
1732 SILC_GET_SKE_FLAGS(conn, params.flags);
1733 if (server->config->param.key_exchange_pfs)
1734 params.flags |= SILC_SKE_SP_FLAG_PFS;
1736 /* Start SILC Key Exchange protocol */
1737 SILC_LOG_DEBUG(("Starting key exchange protocol, connection %p", sconn));
1738 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
1739 server->public_key, server->private_key, sconn);
1742 silc_packet_stream_destroy(sconn->sock);
1743 if (sconn->callback)
1744 (*sconn->callback)(server, NULL, sconn->callback_context);
1745 silc_server_connection_free(sconn);
1748 silc_ske_set_callbacks(ske, silc_server_verify_key,
1749 silc_server_ke_completed, sconn->sock);
1751 /* Start key exchange protocol */
1752 params.version = silc_version_string;
1753 params.timeout_secs = server->config->key_exchange_timeout;
1754 entry->op = silc_ske_initiator(ske, sconn->sock, ¶ms, NULL);
1757 /* Timeout callback that will be called to retry connecting to remote
1758 router. This is used by both normal and router server. This will wait
1759 before retrying the connecting. The timeout is generated by exponential
1760 backoff algorithm. */
1762 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
1764 SilcServerConnection sconn = context;
1765 SilcServer server = sconn->server;
1766 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
1767 SilcServerConfigConnParams *param =
1768 (conn->param ? conn->param : &server->config->param);
1770 SILC_LOG_INFO(("Retrying connecting to %s:%d", sconn->remote_host,
1771 sconn->remote_port));
1773 /* Calculate next timeout */
1774 if (sconn->retry_count >= 1) {
1775 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
1776 if (sconn->retry_timeout > param->reconnect_interval_max)
1777 sconn->retry_timeout = param->reconnect_interval_max;
1779 sconn->retry_timeout = param->reconnect_interval;
1781 sconn->retry_count++;
1782 sconn->retry_timeout = sconn->retry_timeout +
1783 (silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER);
1785 /* If we've reached max retry count, give up. */
1786 if ((sconn->retry_count > param->reconnect_count) &&
1787 !param->reconnect_keep_trying) {
1788 SILC_LOG_ERROR(("Could not connect, giving up"));
1790 if (sconn->callback)
1791 (*sconn->callback)(server, NULL, sconn->callback_context);
1792 silc_server_connection_free(sconn);
1796 SILC_LOG_DEBUG(("Retrying connecting %d seconds", sconn->retry_timeout));
1798 /* We will lookup a fresh pointer later */
1799 silc_server_config_unref(&sconn->conn);
1801 /* Wait before retrying */
1802 silc_schedule_task_del_by_context(server->schedule, sconn);
1803 silc_schedule_task_add_timeout(server->schedule, silc_server_connect_router,
1804 sconn, sconn->retry_timeout, 0);
1807 /* Callback for async connection to remote router */
1809 static void silc_server_connection_established(SilcNetStatus status,
1813 SilcServerConnection sconn = context;
1814 SilcServer server = sconn->server;
1816 silc_schedule_task_del_by_context(server->schedule, sconn);
1821 SILC_LOG_DEBUG(("Connection %p to %s:%d established", sconn,
1822 sconn->remote_host, sconn->remote_port));
1824 /* Continue with key exchange protocol */
1825 sconn->stream = stream;
1826 silc_server_start_key_exchange(sconn);
1829 case SILC_NET_UNKNOWN_IP:
1830 case SILC_NET_UNKNOWN_HOST:
1831 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1832 sconn->remote_host, sconn->remote_port,
1833 silc_net_get_error_string(status)));
1835 if (sconn->callback)
1836 (*sconn->callback)(server, NULL, sconn->callback_context);
1837 silc_server_connection_free(sconn);
1841 SILC_LOG_ERROR(("Could not connect to %s:%d: %s",
1842 sconn->remote_host, sconn->remote_port,
1843 silc_net_get_error_string(status)));
1844 if (!sconn->no_reconnect) {
1845 silc_schedule_task_add_timeout(sconn->server->schedule,
1846 silc_server_connect_to_router_retry,
1848 silc_dlist_del(server->conns, sconn);
1850 if (sconn->callback)
1851 (*sconn->callback)(server, NULL, sconn->callback_context);
1852 silc_server_connection_free(sconn);
1858 /* Generic routine to use connect to a router. */
1860 SILC_TASK_CALLBACK(silc_server_connect_router)
1862 SilcServerConnection sconn = context;
1863 SilcServer server = sconn->server;
1864 SilcServerConfigRouter *rconn;
1866 silc_schedule_task_del_by_context(server->schedule, sconn);
1868 /* Don't connect if we are shutting down. */
1869 if (server->server_shutdown) {
1870 if (sconn->callback)
1871 (*sconn->callback)(server, NULL, sconn->callback_context);
1872 silc_server_connection_free(sconn);
1876 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
1877 (sconn->backup ? "backup router" : "router"),
1878 sconn->remote_host, sconn->remote_port));
1880 if (!sconn->no_conf) {
1881 /* Find connection configuration */
1882 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
1883 sconn->remote_port);
1885 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
1886 (sconn->backup ? "backup router" : "router"),
1887 sconn->remote_host, sconn->remote_port));
1888 silc_server_connection_free(sconn);
1891 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
1894 /* Connect to remote host */
1896 silc_net_tcp_connect((!server->config->server_info->primary ? NULL :
1897 server->config->server_info->primary->server_ip),
1898 sconn->remote_host, sconn->remote_port,
1899 server->schedule, silc_server_connection_established,
1902 SILC_LOG_ERROR(("Could not connect to router %s:%d",
1903 sconn->remote_host, sconn->remote_port));
1904 silc_server_connection_free(sconn);
1908 /* Add to connection list */
1909 silc_dlist_add(server->conns, sconn);
1912 /* This function connects to our primary router or if we are a router this
1913 establishes all our primary routes. This is called at the start of the
1914 server to do authentication and key exchange with our router - called
1917 SILC_TASK_CALLBACK(silc_server_connect_to_router)
1919 SilcServer server = context;
1920 SilcServerConnection sconn;
1921 SilcServerConfigRouter *ptr;
1923 /* Don't connect if we are shutting down. */
1924 if (server->server_shutdown)
1927 SILC_LOG_DEBUG(("We are %s",
1928 (server->server_type == SILC_SERVER ?
1929 "normal server" : server->server_type == SILC_ROUTER ?
1930 "router" : "backup router/normal server")));
1932 if (!server->config->routers) {
1933 /* There wasn't a configured router, we will continue but we don't
1934 have a connection to outside world. We will be standalone server. */
1935 SILC_LOG_DEBUG(("No router(s), we are standalone"));
1936 server->standalone = TRUE;
1940 /* Cancel any possible retry timeouts */
1941 silc_schedule_task_del_by_callback(server->schedule,
1942 silc_server_connect_router);
1943 silc_schedule_task_del_by_callback(server->schedule,
1944 silc_server_connect_to_router_retry);
1946 /* Create the connections to all our routes */
1947 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
1949 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
1950 ptr->backup_router ? "Backup router" : "Router",
1951 ptr->initiator ? "Initiator" : "Responder",
1952 ptr->host, ptr->port));
1954 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
1955 ptr->initiator == FALSE && !server->backup_router &&
1956 !silc_server_config_get_backup_router(server))
1957 server->wait_backup = TRUE;
1959 if (!ptr->initiator)
1961 if (ptr->dynamic_connection)
1964 /* Check whether we are connecting or connected to this host already */
1965 if (silc_server_num_sockets_by_remote(server,
1966 silc_net_is_ip(ptr->host) ?
1968 silc_net_is_ip(ptr->host) ?
1969 NULL : ptr->host, ptr->port,
1970 SILC_CONN_ROUTER)) {
1971 SILC_LOG_DEBUG(("We are already connected to %s:%d",
1972 ptr->host, ptr->port));
1974 /* If we don't have primary router and this connection is our
1975 primary router we are in desync. Reconnect to the primary. */
1976 if (server->standalone && !server->router) {
1978 SilcPacketStream sock;
1979 SilcServerConfigRouter *primary =
1980 silc_server_config_get_primary_router(server);
1983 sock = silc_server_find_socket_by_host(server, SILC_CONN_ROUTER,
1984 ptr->host, ptr->port);
1987 server->backup_noswitch = TRUE;
1988 silc_server_free_sock_user_data(server, sock, NULL);
1989 silc_server_disconnect_remote(server, sock, 0, NULL);
1990 server->backup_noswitch = FALSE;
1991 SILC_LOG_DEBUG(("Reconnecting to primary router"));
1997 /* Allocate connection object for hold connection specific stuff. */
1998 sconn = silc_calloc(1, sizeof(*sconn));
2001 sconn->server = server;
2002 sconn->remote_host = strdup(ptr->host);
2003 sconn->remote_port = ptr->port;
2004 sconn->backup = ptr->backup_router;
2005 if (sconn->backup) {
2006 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
2007 sconn->backup_replace_port = ptr->backup_replace_port;
2010 SILC_LOG_DEBUG(("Created connection %p", sconn));
2012 if (!server->router_conn && !sconn->backup)
2013 server->router_conn = sconn;
2016 silc_server_connect_router(server->schedule, server, SILC_TASK_EXPIRE,
2022 /************************ Accepting new connection **************************/
2024 /* After this is called, server don't wait for backup router anymore.
2025 This gets called automatically even after we have backup router
2026 connection established. */
2028 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
2030 SilcServer server = context;
2031 server->wait_backup = FALSE;
2034 /* Authentication data callback */
2037 silc_server_accept_get_auth(SilcConnAuth connauth,
2038 SilcConnectionType conn_type,
2039 unsigned char **passphrase,
2040 SilcUInt32 *passphrase_len,
2041 SilcSKR *repository,
2044 SilcPacketStream sock = context;
2045 SilcUnknownEntry entry = silc_packet_get_context(sock);
2046 SilcServer server = entry->server;
2048 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
2050 /* Remote end is client */
2051 if (conn_type == SILC_CONN_CLIENT) {
2052 SilcServerConfigClient *cconfig = entry->cconfig.ref_ptr;
2056 *passphrase = cconfig->passphrase;
2057 *passphrase_len = cconfig->passphrase_len;
2058 if (cconfig->publickeys)
2059 *repository = server->repository;
2061 if (cconfig->publickeys) {
2062 if (server->config->prefer_passphrase_auth) {
2066 *passphrase_len = 0;
2070 entry->conn_type = conn_type;
2074 /* Remote end is server */
2075 if (conn_type == SILC_CONN_SERVER) {
2076 SilcServerConfigServer *sconfig;
2078 /* If we are normal server, don't accept the connection */
2079 if (server->server_type == SILC_SERVER)
2082 sconfig = entry->sconfig.ref_ptr;
2086 *passphrase = sconfig->passphrase;
2087 *passphrase_len = sconfig->passphrase_len;
2088 if (sconfig->publickeys)
2089 *repository = server->repository;
2091 if (sconfig->publickeys) {
2092 if (server->config->prefer_passphrase_auth) {
2096 *passphrase_len = 0;
2100 entry->conn_type = conn_type;
2104 /* Remote end is router */
2105 if (conn_type == SILC_CONN_ROUTER) {
2106 SilcServerConfigRouter *rconfig = entry->rconfig.ref_ptr;
2110 *passphrase = rconfig->passphrase;
2111 *passphrase_len = rconfig->passphrase_len;
2112 if (rconfig->publickeys)
2113 *repository = server->repository;
2115 if (rconfig->publickeys) {
2116 if (server->config->prefer_passphrase_auth) {
2120 *passphrase_len = 0;
2124 entry->conn_type = conn_type;
2131 /* Authentication completion callback. */
2134 silc_server_accept_auth_compl(SilcConnAuth connauth, SilcBool success,
2137 SilcPacketStream sock = context;
2138 SilcUnknownEntry entry = silc_packet_get_context(sock);
2139 SilcIDListData idata = (SilcIDListData)entry;
2140 SilcServer server = entry->server;
2141 SilcServerConfigConnParams *param = &server->config->param;
2142 SilcServerConnection sconn;
2144 const char *hostname, *ip;
2148 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2149 NULL, &hostname, &ip, &port);
2151 if (success == FALSE) {
2152 /* Authentication failed */
2153 SILC_LOG_INFO(("Authentication failed for %s (%s) [%s]", entry->hostname,
2154 entry->ip, SILC_CONNTYPE_STRING(entry->data.conn_type)));
2155 server->stat.auth_failures++;
2156 silc_server_disconnect_remote(server, sock,
2157 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2158 silc_server_free_sock_user_data(server, sock, NULL);
2162 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
2164 switch (entry->conn_type) {
2165 case SILC_CONN_CLIENT:
2167 SilcClientEntry client;
2168 SilcServerConfigClient *conn = entry->cconfig.ref_ptr;
2170 /* Verify whether this connection is after all allowed to connect */
2171 if (!silc_server_connection_allowed(server, sock, entry->conn_type,
2172 &server->config->param,
2174 silc_connauth_get_ske(connauth))) {
2175 server->stat.auth_failures++;
2179 /* If we are primary router and we have backup router configured
2180 but it has not connected to use yet, do not accept any other
2182 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2183 !server->backup_router) {
2184 SilcServerConfigRouter *router;
2185 router = silc_server_config_get_backup_router(server);
2186 if (router && strcmp(server->config->server_info->primary->server_ip,
2188 silc_server_find_socket_by_host(server,
2190 router->backup_replace_ip, 0)) {
2191 SILC_LOG_INFO(("Will not accept connections because we do "
2192 "not have backup router connection established"));
2193 silc_server_disconnect_remote(server, sock,
2194 SILC_STATUS_ERR_PERM_DENIED,
2195 "We do not have connection to backup "
2196 "router established, try later");
2197 silc_server_free_sock_user_data(server, sock, NULL);
2198 server->stat.auth_failures++;
2200 /* From here on, wait 20 seconds for the backup router to appear. */
2201 silc_schedule_task_add_timeout(server->schedule,
2202 silc_server_backup_router_wait,
2203 (void *)server, 20, 0);
2208 SILC_LOG_DEBUG(("Remote host is client"));
2209 SILC_LOG_INFO(("Connection %s (%s) is client", entry->hostname,
2212 /* Add the client to the client ID cache. The nickname and Client ID
2213 and other information is created after we have received NEW_CLIENT
2214 packet from client. */
2215 client = silc_idlist_add_client(server->local_list,
2216 NULL, NULL, NULL, NULL, NULL, sock);
2218 SILC_LOG_ERROR(("Could not add new client to cache"));
2219 server->stat.auth_failures++;
2220 silc_server_disconnect_remote(server, sock,
2221 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2222 silc_server_free_sock_user_data(server, sock, NULL);
2225 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2226 entry->data.conn_type = SILC_CONN_CLIENT;
2229 server->stat.my_clients++;
2230 server->stat.clients++;
2231 server->stat.cell_clients++;
2233 /* Get connection parameters */
2235 param = conn->param;
2237 if (!param->keepalive_secs)
2238 param->keepalive_secs = server->config->param.keepalive_secs;
2240 if (!param->qos && server->config->param.qos) {
2241 param->qos = server->config->param.qos;
2242 param->qos_rate_limit = server->config->param.qos_rate_limit;
2243 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2244 param->qos_limit_sec = server->config->param.qos_limit_sec;
2245 param->qos_limit_usec = server->config->param.qos_limit_usec;
2248 /* Check if to be anonymous connection */
2249 if (param->anonymous)
2250 client->mode |= SILC_UMODE_ANONYMOUS;
2253 /* Add public key to repository */
2254 SILC_LOG_DEBUG(("Add client public key to repository"));
2255 if (!silc_server_get_public_key_by_client(server, client, NULL))
2256 silc_skr_add_public_key_simple(server->repository,
2257 entry->data.public_key,
2258 SILC_SKR_USAGE_IDENTIFICATION, client,
2261 id_entry = (void *)client;
2265 case SILC_CONN_SERVER:
2266 case SILC_CONN_ROUTER:
2268 SilcServerEntry new_server;
2269 SilcBool initiator = FALSE;
2270 SilcBool backup_local = FALSE;
2271 SilcBool backup_router = FALSE;
2272 char *backup_replace_ip = NULL;
2273 SilcUInt16 backup_replace_port = 0;
2274 SilcServerConfigServer *srvconn = entry->sconfig.ref_ptr;
2275 SilcServerConfigRouter *rconn = entry->rconfig.ref_ptr;
2277 /* If we are backup router and this is incoming server connection
2278 and we do not have connection to primary router, do not allow
2280 if (server->server_type == SILC_BACKUP_ROUTER &&
2281 entry->conn_type == SILC_CONN_SERVER &&
2282 !SILC_PRIMARY_ROUTE(server)) {
2283 SILC_LOG_INFO(("Will not accept server connection because we do "
2284 "not have primary router connection established"));
2285 silc_server_disconnect_remote(server, sock,
2286 SILC_STATUS_ERR_PERM_DENIED,
2287 "We do not have connection to primary "
2288 "router established, try later");
2289 silc_server_free_sock_user_data(server, sock, NULL);
2290 server->stat.auth_failures++;
2294 if (entry->conn_type == SILC_CONN_ROUTER) {
2295 /* Verify whether this connection is after all allowed to connect */
2296 if (!silc_server_connection_allowed(server, sock,
2298 &server->config->param,
2299 rconn ? rconn->param : NULL,
2300 silc_connauth_get_ske(connauth))) {
2301 server->stat.auth_failures++;
2307 param = rconn->param;
2309 if (!param->keepalive_secs)
2310 param->keepalive_secs = server->config->param.keepalive_secs;
2312 if (!param->qos && server->config->param.qos) {
2313 param->qos = server->config->param.qos;
2314 param->qos_rate_limit = server->config->param.qos_rate_limit;
2315 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2316 param->qos_limit_sec = server->config->param.qos_limit_sec;
2317 param->qos_limit_usec = server->config->param.qos_limit_usec;
2321 initiator = rconn->initiator;
2322 backup_local = rconn->backup_local;
2323 backup_router = rconn->backup_router;
2324 backup_replace_ip = rconn->backup_replace_ip;
2325 backup_replace_port = rconn->backup_replace_port;
2329 if (entry->conn_type == SILC_CONN_SERVER) {
2330 /* Verify whether this connection is after all allowed to connect */
2331 if (!silc_server_connection_allowed(server, sock,
2333 &server->config->param,
2334 srvconn ? srvconn->param : NULL,
2335 silc_connauth_get_ske(connauth))) {
2336 server->stat.auth_failures++;
2340 if (srvconn->param) {
2341 param = srvconn->param;
2343 if (!param->keepalive_secs)
2344 param->keepalive_secs = server->config->param.keepalive_secs;
2346 if (!param->qos && server->config->param.qos) {
2347 param->qos = server->config->param.qos;
2348 param->qos_rate_limit = server->config->param.qos_rate_limit;
2349 param->qos_bytes_limit = server->config->param.qos_bytes_limit;
2350 param->qos_limit_sec = server->config->param.qos_limit_sec;
2351 param->qos_limit_usec = server->config->param.qos_limit_usec;
2355 backup_router = srvconn->backup_router;
2359 /* If we are primary router and we have backup router configured
2360 but it has not connected to use yet, do not accept any other
2362 if (server->wait_backup && server->server_type == SILC_ROUTER &&
2363 !server->backup_router && !backup_router) {
2364 SilcServerConfigRouter *router;
2365 router = silc_server_config_get_backup_router(server);
2366 if (router && strcmp(server->config->server_info->primary->server_ip,
2368 silc_server_find_socket_by_host(server,
2370 router->backup_replace_ip, 0)) {
2371 SILC_LOG_INFO(("Will not accept connections because we do "
2372 "not have backup router connection established"));
2373 silc_server_disconnect_remote(server, sock,
2374 SILC_STATUS_ERR_PERM_DENIED,
2375 "We do not have connection to backup "
2376 "router established, try later");
2377 silc_server_free_sock_user_data(server, sock, NULL);
2378 server->stat.auth_failures++;
2380 /* From here on, wait 20 seconds for the backup router to appear. */
2381 silc_schedule_task_add_timeout(server->schedule,
2382 silc_server_backup_router_wait,
2383 (void *)server, 20, 0);
2388 SILC_LOG_DEBUG(("Remote host is %s",
2389 entry->conn_type == SILC_CONN_SERVER ?
2390 "server" : (backup_router ?
2391 "backup router" : "router")));
2392 SILC_LOG_INFO(("Connection %s (%s) is %s", entry->hostname,
2393 entry->ip, entry->conn_type == SILC_CONN_SERVER ?
2394 "server" : (backup_router ?
2395 "backup router" : "router")));
2397 /* Add the server into server cache. The server name and Server ID
2398 is updated after we have received NEW_SERVER packet from the
2399 server. We mark ourselves as router for this server if we really
2402 silc_idlist_add_server((entry->conn_type == SILC_CONN_SERVER ?
2403 server->local_list : (backup_router ?
2404 server->local_list :
2405 server->global_list)),
2407 (entry->conn_type == SILC_CONN_SERVER ?
2408 SILC_SERVER : SILC_ROUTER),
2410 (entry->conn_type == SILC_CONN_SERVER ?
2411 server->id_entry : (backup_router ?
2412 server->id_entry : NULL)),
2415 SILC_LOG_ERROR(("Could not add new server to cache"));
2416 silc_server_disconnect_remote(server, sock,
2417 SILC_STATUS_ERR_AUTH_FAILED, NULL);
2418 silc_server_free_sock_user_data(server, sock, NULL);
2419 server->stat.auth_failures++;
2422 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
2423 entry->data.conn_type = entry->conn_type;
2425 id_entry = (void *)new_server;
2427 /* If the incoming connection is router and marked as backup router
2428 then add it to be one of our backups */
2429 if (entry->data.conn_type == SILC_CONN_ROUTER && backup_router) {
2430 /* Change it back to SERVER type since that's what it really is. */
2432 entry->data.conn_type = SILC_CONN_SERVER;
2433 new_server->server_type = SILC_BACKUP_ROUTER;
2435 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
2436 ("Backup router %s is now online",
2439 /* Remove the backup waiting with timeout */
2440 silc_schedule_task_add_timeout(server->schedule,
2441 silc_server_backup_router_wait,
2442 (void *)server, 10, 0);
2446 if (entry->data.conn_type == SILC_CONN_SERVER) {
2447 server->stat.my_servers++;
2448 server->stat.servers++;
2449 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
2451 server->stat.my_routers++;
2452 server->stat.routers++;
2453 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
2456 /* Check whether this connection is to be our primary router connection
2457 if we do not already have the primary route. */
2458 if (!backup_router &&
2459 server->standalone && entry->data.conn_type == SILC_CONN_ROUTER) {
2460 if (silc_server_config_is_primary_route(server) && !initiator)
2463 SILC_LOG_DEBUG(("We are not standalone server anymore"));
2464 server->standalone = FALSE;
2465 if (!server->id_entry->router) {
2466 server->id_entry->router = id_entry;
2467 server->router = id_entry;
2479 /* Add connection to server->conns so that we know we have connection
2481 sconn = silc_calloc(1, sizeof(*sconn));
2482 sconn->server = server;
2484 sconn->remote_host = strdup(hostname);
2485 sconn->remote_port = port;
2486 silc_dlist_add(server->conns, sconn);
2487 idata->sconn = sconn;
2488 idata->last_receive = time(NULL);
2490 /* Add the common data structure to the ID entry. */
2491 silc_idlist_add_data(id_entry, (SilcIDListData)entry);
2492 silc_packet_set_context(sock, id_entry);
2494 /* Connection has been fully established now. Everything is ok. */
2495 SILC_LOG_DEBUG(("New connection %p authenticated", sconn));
2497 /* Perform Quality of Service */
2499 silc_socket_stream_set_qos(silc_packet_stream_get_stream(sock),
2500 param->qos_rate_limit, param->qos_bytes_limit,
2501 param->qos_limit_sec, param->qos_limit_usec);
2503 silc_server_config_unref(&entry->cconfig);
2504 silc_server_config_unref(&entry->sconfig);
2505 silc_server_config_unref(&entry->rconfig);
2509 silc_ske_free(silc_connauth_get_ske(connauth));
2510 silc_connauth_free(connauth);
2513 /* SKE completion callback. We set the new keys into use here. */
2516 silc_server_accept_completed(SilcSKE ske, SilcSKEStatus status,
2517 SilcSKESecurityProperties prop,
2518 SilcSKEKeyMaterial keymat,
2519 SilcSKERekeyMaterial rekey,
2522 SilcPacketStream sock = context;
2523 SilcUnknownEntry entry = silc_packet_get_context(sock);
2524 SilcIDListData idata = (SilcIDListData)entry;
2525 SilcServer server = entry->server;
2526 SilcConnAuth connauth;
2527 SilcCipher send_key, receive_key;
2528 SilcHmac hmac_send, hmac_receive;
2535 if (status != SILC_SKE_STATUS_OK) {
2537 SILC_LOG_ERROR(("Error (%s) during Key Exchange protocol with %s (%s)",
2538 silc_ske_map_status(status), entry->hostname, entry->ip));
2540 silc_server_disconnect_remote(server, sock,
2541 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2542 silc_server_free_sock_user_data(server, sock, NULL);
2546 SILC_LOG_DEBUG(("Setting keys into use"));
2548 /* Set the keys into use. The data will be encrypted after this. */
2549 if (!silc_ske_set_keys(ske, keymat, prop, &send_key, &receive_key,
2550 &hmac_send, &hmac_receive, &hash)) {
2551 /* Error setting keys */
2553 silc_server_disconnect_remote(server, sock,
2554 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
2555 silc_server_free_sock_user_data(server, sock, NULL);
2558 silc_packet_set_keys(sock, send_key, receive_key, hmac_send,
2559 hmac_receive, FALSE);
2561 idata->rekey = rekey;
2562 idata->public_key = silc_pkcs_public_key_copy(prop->public_key);
2563 pk = silc_pkcs_public_key_encode(idata->public_key, &pk_len);
2564 silc_hash_make(server->sha1hash, pk, pk_len, idata->fingerprint);
2566 silc_hash_alloc(silc_hash_get_name(prop->hash), &idata->hash);
2568 SILC_LOG_DEBUG(("Starting connection authentication"));
2569 server->stat.auth_attempts++;
2571 connauth = silc_connauth_alloc(server->schedule, ske,
2572 server->config->conn_auth_timeout);
2574 /** Error allocating auth protocol */
2576 silc_server_disconnect_remote(server, sock,
2577 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2578 silc_server_free_sock_user_data(server, sock, NULL);
2582 /* Start connection authentication */
2584 silc_connauth_responder(connauth, silc_server_accept_get_auth,
2585 silc_server_accept_auth_compl, sock);
2588 /* Accept new TCP connection */
2590 static void silc_server_accept_new_connection(SilcNetStatus status,
2594 SilcServer server = context;
2595 SilcPacketStream packet_stream;
2596 SilcServerConfigClient *cconfig = NULL;
2597 SilcServerConfigServer *sconfig = NULL;
2598 SilcServerConfigRouter *rconfig = NULL;
2599 SilcServerConfigDeny *deny;
2600 SilcUnknownEntry entry;
2602 SilcSKEParamsStruct params;
2603 char *hostname, *ip;
2606 SILC_LOG_DEBUG(("Accepting new connection"));
2608 /* Check for maximum allowed connections */
2609 server->stat.conn_attempts++;
2610 if (silc_dlist_count(server->conns) >
2611 server->config->param.connections_max) {
2612 SILC_LOG_ERROR(("Refusing connection, server is full"));
2613 server->stat.conn_failures++;
2614 silc_stream_destroy(stream);
2618 /* Get hostname, IP and port */
2619 if (!silc_socket_stream_get_info(stream, NULL, (const char **)&hostname,
2620 (const char **)&ip, &port)) {
2621 /* Bad socket stream */
2622 server->stat.conn_failures++;
2623 silc_stream_destroy(stream);
2627 /* Create packet stream */
2628 packet_stream = silc_packet_stream_create(server->packet_engine,
2629 server->schedule, stream);
2630 if (!packet_stream) {
2631 SILC_LOG_ERROR(("Refusing connection, cannot create packet stream"));
2632 server->stat.conn_failures++;
2633 silc_stream_destroy(stream);
2636 server->stat.conn_num++;
2638 /* Set source ID to packet stream */
2639 if (!silc_packet_set_ids(packet_stream, SILC_ID_SERVER, server->id,
2642 server->stat.conn_failures++;
2643 silc_packet_stream_destroy(packet_stream);
2647 /* Check whether this connection is denied to connect to us. */
2648 deny = silc_server_config_find_denied(server, ip);
2650 deny = silc_server_config_find_denied(server, hostname);
2652 /* The connection is denied */
2653 SILC_LOG_INFO(("Connection %s (%s) is denied", hostname, ip));
2654 silc_server_disconnect_remote(server, packet_stream,
2655 SILC_STATUS_ERR_BANNED_FROM_SERVER,
2657 silc_server_free_sock_user_data(server, packet_stream, NULL);
2661 /* Check whether we have configured this sort of connection at all. We
2662 have to check all configurations since we don't know what type of
2663 connection this is. */
2664 if (!(cconfig = silc_server_config_find_client(server, ip)))
2665 cconfig = silc_server_config_find_client(server, hostname);
2666 if (!(sconfig = silc_server_config_find_server_conn(server, ip)))
2667 sconfig = silc_server_config_find_server_conn(server, hostname);
2668 if (server->server_type == SILC_ROUTER)
2669 if (!(rconfig = silc_server_config_find_router_conn(server, ip, port)))
2670 rconfig = silc_server_config_find_router_conn(server, hostname, port);
2671 if (!cconfig && !sconfig && !rconfig) {
2672 SILC_LOG_INFO(("Connection %s (%s) is not allowed", hostname, ip));
2673 server->stat.conn_failures++;
2674 silc_server_disconnect_remote(server, packet_stream,
2675 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
2676 silc_server_free_sock_user_data(server, packet_stream, NULL);
2680 /* The connection is allowed */
2681 entry = silc_calloc(1, sizeof(*entry));
2683 server->stat.conn_failures++;
2684 silc_server_disconnect_remote(server, packet_stream,
2685 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2686 silc_server_free_sock_user_data(server, packet_stream, NULL);
2689 entry->hostname = hostname;
2692 entry->server = server;
2693 entry->data.conn_type = SILC_CONN_UNKNOWN;
2694 silc_packet_set_context(packet_stream, entry);
2696 silc_server_config_ref(&entry->cconfig, server->config, cconfig);
2697 silc_server_config_ref(&entry->sconfig, server->config, sconfig);
2698 silc_server_config_ref(&entry->rconfig, server->config, rconfig);
2700 /* Take flags for key exchange. Since we do not know what type of connection
2701 this is, we go through all found configurations and use the global ones
2702 as well. This will result always into strictest key exchange flags. */
2703 memset(¶ms, 0, sizeof(params));
2704 SILC_GET_SKE_FLAGS(cconfig, params.flags);
2705 SILC_GET_SKE_FLAGS(sconfig, params.flags);
2706 SILC_GET_SKE_FLAGS(rconfig, params.flags);
2707 if (server->config->param.key_exchange_pfs)
2708 params.flags |= SILC_SKE_SP_FLAG_PFS;
2710 SILC_LOG_INFO(("Incoming connection %s (%s)", hostname, ip));
2711 server->stat.conn_attempts++;
2713 /* Start SILC Key Exchange protocol */
2714 SILC_LOG_DEBUG(("Starting key exchange protocol"));
2715 ske = silc_ske_alloc(server->rng, server->schedule, server->repository,
2716 server->public_key, server->private_key,
2719 server->stat.conn_failures++;
2720 silc_server_disconnect_remote(server, packet_stream,
2721 SILC_STATUS_ERR_RESOURCE_LIMIT, NULL);
2722 silc_server_free_sock_user_data(server, packet_stream, NULL);
2725 silc_ske_set_callbacks(ske, silc_server_verify_key,
2726 silc_server_accept_completed, packet_stream);
2728 /* Start key exchange protocol */
2729 params.version = silc_version_string;
2730 params.timeout_secs = server->config->key_exchange_timeout;
2731 entry->op = silc_ske_responder(ske, packet_stream, ¶ms);
2735 /********************************** Rekey ***********************************/
2737 /* Initiator rekey completion callback */
2739 static void silc_server_rekey_completion(SilcSKE ske,
2740 SilcSKEStatus status,
2741 const SilcSKESecurityProperties prop,
2742 const SilcSKEKeyMaterial keymat,
2743 SilcSKERekeyMaterial rekey,
2746 SilcPacketStream sock = context;
2747 SilcIDListData idata = silc_packet_get_context(sock);
2748 SilcServer server = idata->sconn->server;
2750 idata->sconn->op = NULL;
2751 if (status != SILC_SKE_STATUS_OK) {
2752 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2753 idata->sconn->remote_host));
2757 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2758 idata->sconn->remote_host, idata->sconn->remote_port,
2759 SILC_CONNTYPE_STRING(idata->conn_type)));
2761 /* Save rekey data for next rekey */
2762 idata->rekey = rekey;
2764 /* Register new rekey timeout */
2765 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2766 sock, idata->sconn->rekey_timeout, 0);
2769 /* Rekey callback. Start rekey as initiator */
2771 SILC_TASK_CALLBACK(silc_server_do_rekey)
2773 SilcServer server = app_context;
2774 SilcPacketStream sock = context;
2775 SilcIDListData idata = silc_packet_get_context(sock);
2778 SILC_LOG_DEBUG(("Perform rekey, sock %p", sock));
2780 /* Do not execute rekey with disabled connections */
2781 if (idata->status & SILC_IDLIST_STATUS_DISABLED)
2784 /* If another protocol is active do not start rekey */
2785 if (idata->sconn->op) {
2786 SILC_LOG_DEBUG(("Waiting for other protocol to finish before rekeying"));
2787 silc_schedule_task_add_timeout(server->schedule, silc_server_do_rekey,
2792 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2793 idata->sconn->remote_host, idata->sconn->remote_port,
2794 SILC_CONNTYPE_STRING(idata->conn_type)));
2797 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2798 server->public_key, NULL, sock);
2802 /* Set SKE callbacks */
2803 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_completion, sock);
2806 idata->sconn->op = silc_ske_rekey_initiator(ske, sock, idata->rekey);
2809 /* Responder rekey completion callback */
2812 silc_server_rekey_resp_completion(SilcSKE ske,
2813 SilcSKEStatus status,
2814 const SilcSKESecurityProperties prop,
2815 const SilcSKEKeyMaterial keymat,
2816 SilcSKERekeyMaterial rekey,
2819 SilcPacketStream sock = context;
2820 SilcIDListData idata = silc_packet_get_context(sock);
2822 idata->sconn->op = NULL;
2823 if (status != SILC_SKE_STATUS_OK) {
2824 SILC_LOG_ERROR(("Error during rekey protocol with %s",
2825 idata->sconn->remote_host));
2829 SILC_LOG_DEBUG(("Rekey protocol completed with %s:%d [%s]",
2830 idata->sconn->remote_host, idata->sconn->remote_port,
2831 SILC_CONNTYPE_STRING(idata->conn_type)));
2833 /* Save rekey data for next rekey */
2834 idata->rekey = rekey;
2837 /* Start rekey as responder */
2839 static void silc_server_rekey(SilcServer server, SilcPacketStream sock,
2842 SilcIDListData idata = silc_packet_get_context(sock);
2845 SILC_LOG_DEBUG(("Executing rekey protocol with %s:%d [%s]",
2846 idata->sconn->remote_host, idata->sconn->remote_port,
2847 SILC_CONNTYPE_STRING(idata->conn_type)));
2850 ske = silc_ske_alloc(server->rng, server->schedule, NULL,
2851 server->public_key, NULL, sock);
2853 silc_packet_free(packet);
2857 /* Set SKE callbacks */
2858 silc_ske_set_callbacks(ske, NULL, silc_server_rekey_resp_completion, sock);
2861 idata->sconn->op = silc_ske_rekey_responder(ske, sock, idata->rekey,
2866 /****************************** Disconnection *******************************/
2868 /* Destroys packet stream. */
2870 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2872 silc_packet_stream_unref(context);
2875 /* Closes connection to socket connection */
2877 void silc_server_close_connection(SilcServer server,
2878 SilcPacketStream sock)
2880 SilcIDListData idata = silc_packet_get_context(sock);
2882 const char *hostname;
2885 if (!silc_packet_stream_is_valid(sock))
2888 memset(tmp, 0, sizeof(tmp));
2889 // silc_socket_get_error(sock, tmp, sizeof(tmp));
2890 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
2891 NULL, &hostname, NULL, &port);
2892 SILC_LOG_INFO(("Closing connection %s:%d [%s] %s", hostname, port,
2893 idata ? SILC_CONNTYPE_STRING(idata->conn_type) : "",
2894 tmp[0] ? tmp : ""));
2896 // silc_socket_set_qos(sock, 0, 0, 0, 0, NULL);
2898 if (idata && idata->sconn) {
2899 silc_server_connection_free(idata->sconn);
2900 idata->sconn = NULL;
2903 /* Take a reference and then destroy the stream. The last reference
2904 is released later in a timeout callback. */
2905 silc_packet_stream_ref(sock);
2906 silc_packet_stream_destroy(sock);
2908 /* Close connection with timeout */
2909 server->stat.conn_num--;
2910 silc_schedule_task_del_by_all(server->schedule, 0,
2911 silc_server_close_connection_final, sock);
2912 silc_schedule_task_add_timeout(server->schedule,
2913 silc_server_close_connection_final,
2917 /* Sends disconnect message to remote connection and disconnects the
2920 void silc_server_disconnect_remote(SilcServer server,
2921 SilcPacketStream sock,
2922 SilcStatus status, ...)
2924 unsigned char buf[512];
2931 SILC_LOG_DEBUG(("Disconnecting remote host"));
2933 va_start(ap, status);
2934 cp = va_arg(ap, char *);
2936 silc_vsnprintf(buf, sizeof(buf), cp, ap);
2939 /* Send SILC_PACKET_DISCONNECT */
2940 silc_packet_send_va(sock, SILC_PACKET_DISCONNECT, 0,
2941 SILC_STR_UI_CHAR(status),
2942 SILC_STR_UI8_STRING(cp ? buf : NULL),
2945 /* Close connection */
2946 silc_server_close_connection(server, sock);
2949 /* Frees client data and notifies about client's signoff. */
2951 void silc_server_free_client_data(SilcServer server,
2952 SilcPacketStream sock,
2953 SilcClientEntry client,
2955 const char *signoff)
2957 SILC_LOG_DEBUG(("Freeing client %p data", client));
2960 /* Check if anyone is watching this nickname */
2961 if (server->server_type == SILC_ROUTER)
2962 silc_server_check_watcher_list(server, client, NULL,
2963 SILC_NOTIFY_TYPE_SIGNOFF);
2965 /* Send SIGNOFF notify to routers. */
2967 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2968 SILC_BROADCAST(server), client->id,
2972 /* Remove client from all channels */
2974 silc_server_remove_from_channels(server, NULL, client,
2975 TRUE, (char *)signoff, TRUE, FALSE);
2977 silc_server_remove_from_channels(server, NULL, client,
2978 FALSE, NULL, FALSE, FALSE);
2980 /* Remove this client from watcher list if it is */
2981 silc_server_del_from_watcher_list(server, client);
2983 /* Remove client's public key from repository, this will free it too. */
2984 if (client->data.public_key) {
2985 silc_skr_del_public_key(server->repository, client->data.public_key,
2987 client->data.public_key = NULL;
2990 /* Update statistics */
2991 server->stat.my_clients--;
2992 server->stat.clients--;
2993 if (server->stat.cell_clients)
2994 server->stat.cell_clients--;
2995 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2996 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2997 silc_schedule_task_del_by_context(server->schedule, client);
2999 if (client->data.sconn) {
3000 silc_server_connection_free(client->data.sconn);
3001 client->data.sconn = NULL;
3004 /* We will not delete the client entry right away. We will take it
3005 into history (for WHOWAS command) for 5 minutes, unless we're
3006 shutting down server. */
3007 if (!server->server_shutdown) {
3008 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
3010 client->router = NULL;
3011 client->connection = NULL;
3012 client->data.created = silc_time();
3013 silc_dlist_add(server->expired_clients, client);
3015 /* Delete directly since we're shutting down server */
3016 SILC_LOG_DEBUG(("Delete client directly"));
3017 silc_idlist_del_data(client);
3018 silc_idlist_del_client(server->local_list, client);
3022 /* Frees user_data pointer from socket connection object. This also sends
3023 appropriate notify packets to the network to inform about leaving
3026 void silc_server_free_sock_user_data(SilcServer server,
3027 SilcPacketStream sock,
3028 const char *signoff_message)
3030 SilcIDListData idata = silc_packet_get_context(sock);
3034 SILC_LOG_DEBUG(("Start"));
3039 // silc_schedule_task_del_by_context(server->schedule, sock);
3041 /* Cancel active protocols */
3043 if (idata->sconn && idata->sconn->op) {
3044 SILC_LOG_DEBUG(("Abort active protocol"));
3045 silc_async_abort(idata->sconn->op, NULL, NULL);
3047 if (idata->conn_type == SILC_CONN_UNKNOWN &&
3048 ((SilcUnknownEntry)idata)->op) {
3049 SILC_LOG_DEBUG(("Abort active protocol"));
3050 silc_async_abort(((SilcUnknownEntry)idata)->op, NULL, NULL);
3054 switch (idata->conn_type) {
3055 case SILC_CONN_CLIENT:
3057 SilcClientEntry client_entry = (SilcClientEntry)idata;
3058 silc_server_free_client_data(server, sock, client_entry, TRUE,
3060 silc_packet_set_context(sock, NULL);
3064 case SILC_CONN_SERVER:
3065 case SILC_CONN_ROUTER:
3067 SilcServerEntry user_data = (SilcServerEntry)idata;
3068 SilcServerEntry backup_router = NULL;
3070 SILC_LOG_DEBUG(("Freeing server %p data", user_data));
3073 backup_router = silc_server_backup_get(server, user_data->id);
3075 if (!server->backup_router && server->server_type == SILC_ROUTER &&
3076 backup_router == server->id_entry &&
3077 idata->conn_type != SILC_CONN_ROUTER)
3078 backup_router = NULL;
3080 if (server->server_shutdown || server->backup_noswitch)
3081 backup_router = NULL;
3083 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
3084 NULL, NULL, &ip, &port);
3086 /* If this was our primary router connection then we're lost to
3087 the outside world. */
3088 if (server->router == user_data) {
3089 /* Check whether we have a backup router connection */
3090 if (!backup_router || backup_router == user_data) {
3091 if (!server->no_reconnect)
3092 silc_server_create_connections(server);
3093 server->id_entry->router = NULL;
3094 server->router = NULL;
3095 server->standalone = TRUE;
3096 server->backup_primary = FALSE;
3097 backup_router = NULL;
3099 if (server->id_entry != backup_router) {
3100 SILC_LOG_INFO(("New primary router is backup router %s",
3101 backup_router->server_name));
3102 server->id_entry->router = backup_router;
3103 server->router = backup_router;
3104 server->router_connect = time(0);
3105 server->backup_primary = TRUE;
3106 backup_router->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
3108 /* Send START_USE to backup router to indicate we have switched */
3109 silc_server_backup_send_start_use(server,
3110 backup_router->connection,
3113 SILC_LOG_INFO(("We are now new primary router in this cell"));
3114 server->id_entry->router = NULL;
3115 server->router = NULL;
3116 server->standalone = TRUE;
3119 /* We stop here to take a breath */
3122 if (server->backup_router) {
3123 server->server_type = SILC_ROUTER;
3125 /* We'll need to constantly try to reconnect to the primary
3126 router so that we'll see when it comes back online. */
3127 silc_server_create_connection(server, FALSE, FALSE, ip, port,
3128 silc_server_backup_connected,
3132 /* Mark this connection as replaced */
3133 silc_server_backup_replaced_add(server, user_data->id,
3136 } else if (backup_router) {
3137 SILC_LOG_INFO(("Enabling the use of backup router %s",
3138 backup_router->server_name));
3140 /* Mark this connection as replaced */
3141 silc_server_backup_replaced_add(server, user_data->id,
3143 } else if (server->server_type == SILC_SERVER &&
3144 idata->conn_type == SILC_CONN_ROUTER) {
3145 /* Reconnect to the router (backup) */
3146 if (!server->no_reconnect)
3147 silc_server_create_connections(server);
3150 if (user_data->server_name)
3151 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE, SILC_NOTIFY_TYPE_NONE,
3152 ("Server %s signoff", user_data->server_name));
3154 if (!backup_router) {
3155 /* Remove all servers that are originated from this server, and
3156 remove the clients of those servers too. */
3157 silc_server_remove_servers_by_server(server, user_data, TRUE);
3160 /* Remove the clients that this server owns as they will become
3161 invalid now too. For backup router the server is actually
3162 coming from the primary router, so mark that as the owner
3164 if (server->server_type == SILC_BACKUP_ROUTER &&
3165 sock->type == SILC_CONN_SERVER)
3166 silc_server_remove_clients_by_server(server, server->router,
3170 silc_server_remove_clients_by_server(server, user_data,
3173 /* Remove channels owned by this server */
3174 if (server->server_type == SILC_SERVER)
3175 silc_server_remove_channels_by_server(server, user_data);
3177 /* Enable local server connections that may be disabled */
3178 silc_server_local_servers_toggle_enabled(server, TRUE);
3180 /* Update the client entries of this server to the new backup
3181 router. If we are the backup router we also resolve the real
3182 servers for the clients. After updating is over this also
3183 removes the clients that this server explicitly owns. */
3184 silc_server_update_clients_by_server(server, user_data,
3185 backup_router, TRUE);
3187 /* If we are router and just lost our primary router (now standlaone)
3188 we remove everything that was behind it, since we don't know
3190 if (server->server_type == SILC_ROUTER && server->standalone)
3191 /* Remove all servers that are originated from this server, and
3192 remove the clients of those servers too. */
3193 silc_server_remove_servers_by_server(server, user_data, TRUE);
3195 /* Finally remove the clients that are explicitly owned by this
3196 server. They go down with the server. */
3197 silc_server_remove_clients_by_server(server, user_data,
3200 /* Update our server cache to use the new backup router too. */
3201 silc_server_update_servers_by_server(server, user_data, backup_router);
3202 if (server->server_type == SILC_SERVER)
3203 silc_server_update_channels_by_server(server, user_data,
3206 /* Send notify about primary router going down to local operators */
3207 if (server->backup_router)
3208 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3209 SILC_NOTIFY_TYPE_NONE,
3210 ("%s switched to backup router %s "
3211 "(we are primary router now)",
3212 server->server_name, server->server_name));
3213 else if (server->router)
3214 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3215 SILC_NOTIFY_TYPE_NONE,
3216 ("%s switched to backup router %s",
3217 server->server_name,
3218 server->router->server_name));
3220 server->backup_noswitch = FALSE;
3223 silc_server_connection_free(idata->sconn);
3226 if (idata->conn_type == SILC_CONN_SERVER) {
3227 server->stat.my_servers--;
3228 server->stat.servers--;
3229 SILC_LOG_DEBUG(("my_servers %d", server->stat.my_servers));
3230 } else if (idata->conn_type == SILC_CONN_ROUTER) {
3231 server->stat.my_routers--;
3232 server->stat.routers--;
3233 SILC_LOG_DEBUG(("my_routers %d", server->stat.my_routers));
3235 if (server->server_type == SILC_ROUTER)
3236 server->stat.cell_servers--;
3238 /* Free the server entry */
3239 silc_server_backup_del(server, user_data);
3240 silc_server_backup_replaced_del(server, user_data);
3241 silc_idlist_del_data(user_data);
3242 if (!silc_idlist_del_server(server->local_list, user_data))
3243 silc_idlist_del_server(server->global_list, user_data);
3245 if (backup_router && backup_router != server->id_entry) {
3246 /* Announce all of our stuff that was created about 5 minutes ago.
3247 The backup router knows all the other stuff already. */
3248 if (server->server_type == SILC_ROUTER)
3249 silc_server_announce_servers(server, FALSE, time(0) - 300,
3250 backup_router->connection);
3252 /* Announce our clients and channels to the router */
3253 silc_server_announce_clients(server, time(0) - 300,
3254 backup_router->connection);
3255 silc_server_announce_channels(server, time(0) - 300,
3256 backup_router->connection);
3259 silc_packet_set_context(sock, NULL);
3265 SilcUnknownEntry entry = (SilcUnknownEntry)idata;
3267 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3270 silc_server_connection_free(idata->sconn);
3271 silc_idlist_del_data(idata);
3273 silc_packet_set_context(sock, NULL);
3279 /* Removes client from all channels it has joined. This is used when client
3280 connection is disconnected. If the client on a channel is last, the
3281 channel is removed as well. This sends the SIGNOFF notify types. */
3283 void silc_server_remove_from_channels(SilcServer server,
3284 SilcPacketStream sock,
3285 SilcClientEntry client,
3287 const char *signoff_message,
3291 SilcChannelEntry channel;
3292 SilcChannelClientEntry chl;
3293 SilcHashTableList htl;
3294 SilcBuffer clidp = NULL;
3299 if (notify && !client->id)
3302 SILC_LOG_DEBUG(("Removing client %s from joined channels",
3303 notify ? silc_id_render(client->id, SILC_ID_CLIENT) : ""));
3306 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3311 /* Remove the client from all channels. The client is removed from
3312 the channels' user list. */
3313 silc_hash_table_list(client->channels, &htl);
3314 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3315 channel = chl->channel;
3317 /* Remove channel if this is last client leaving the channel, unless
3318 the channel is permanent. */
3319 if (server->server_type != SILC_SERVER &&
3320 silc_hash_table_count(channel->user_list) < 2) {
3321 silc_server_channel_delete(server, channel);
3325 silc_hash_table_del(client->channels, channel);
3326 silc_hash_table_del(channel->user_list, client);
3327 channel->user_count--;
3329 /* If there is no global users on the channel anymore mark the channel
3330 as local channel. Do not check if the removed client is local client. */
3331 if (server->server_type == SILC_SERVER && channel->global_users &&
3332 chl->client->router && !silc_server_channel_has_global(channel))
3333 channel->global_users = FALSE;
3335 memset(chl, 'A', sizeof(*chl));
3338 /* Update statistics */
3339 if (SILC_IS_LOCAL(client))
3340 server->stat.my_chanclients--;
3341 if (server->server_type == SILC_ROUTER) {
3342 server->stat.cell_chanclients--;
3343 server->stat.chanclients--;
3346 /* If there is not at least one local user on the channel then we don't
3347 need the channel entry anymore, we can remove it safely, unless the
3348 channel is permanent channel */
3349 if (server->server_type == SILC_SERVER &&
3350 !silc_server_channel_has_local(channel)) {
3351 /* Notify about leaving client if this channel has global users. */
3352 if (notify && channel->global_users)
3353 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3354 SILC_NOTIFY_TYPE_SIGNOFF,
3355 signoff_message ? 2 : 1,
3356 clidp->data, silc_buffer_len(clidp),
3357 signoff_message, signoff_message ?
3358 strlen(signoff_message) : 0);
3360 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3361 silc_server_channel_delete(server, channel);
3365 /* Send notify to channel about client leaving SILC and channel too */
3367 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3368 SILC_NOTIFY_TYPE_SIGNOFF,
3369 signoff_message ? 2 : 1,
3370 clidp->data, silc_buffer_len(clidp),
3371 signoff_message, signoff_message ?
3372 strlen(signoff_message) : 0);
3374 if (killed && clidp) {
3375 /* Remove the client from channel's invite list */
3376 if (channel->invite_list &&
3377 silc_hash_table_count(channel->invite_list)) {
3379 SilcArgumentPayload iargs;
3380 ab = silc_argument_payload_encode_one(NULL, clidp->data,
3381 silc_buffer_len(clidp), 3);
3382 iargs = silc_argument_payload_parse(ab->data, silc_buffer_len(ab), 1);
3383 silc_server_inviteban_process(server, channel->invite_list, 1, iargs);
3384 silc_buffer_free(ab);
3385 silc_argument_payload_free(iargs);
3389 /* Don't create keys if we are shutting down */
3390 if (server->server_shutdown)
3393 /* Re-generate channel key if needed */
3394 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3395 if (!silc_server_create_channel_key(server, channel, 0))
3398 /* Send the channel key to the channel. The key of course is not sent
3399 to the client who was removed from the channel. */
3400 silc_server_send_channel_key(server, client->connection, channel,
3401 server->server_type == SILC_ROUTER ?
3402 FALSE : !server->standalone);
3406 silc_hash_table_list_reset(&htl);
3408 silc_buffer_free(clidp);
3411 /* Removes client from one channel. This is used for example when client
3412 calls LEAVE command to remove itself from the channel. Returns TRUE
3413 if channel still exists and FALSE if the channel is removed when
3414 last client leaves the channel. If `notify' is FALSE notify messages
3417 SilcBool silc_server_remove_from_one_channel(SilcServer server,
3418 SilcPacketStream sock,
3419 SilcChannelEntry channel,
3420 SilcClientEntry client,
3423 SilcChannelClientEntry chl;
3426 SILC_LOG_DEBUG(("Removing %s from channel %s",
3427 silc_id_render(client->id, SILC_ID_CLIENT),
3428 channel->channel_name));
3430 /* Get the entry to the channel, if this client is not on the channel
3432 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3435 /* Remove channel if this is last client leaving the channel, unless
3436 the channel is permanent. */
3437 if (server->server_type != SILC_SERVER &&
3438 silc_hash_table_count(channel->user_list) < 2) {
3439 silc_server_channel_delete(server, channel);
3443 silc_hash_table_del(client->channels, channel);
3444 silc_hash_table_del(channel->user_list, client);
3445 channel->user_count--;
3447 /* If there is no global users on the channel anymore mark the channel
3448 as local channel. Do not check if the client is local client. */
3449 if (server->server_type == SILC_SERVER && channel->global_users &&
3450 chl->client->router && !silc_server_channel_has_global(channel))
3451 channel->global_users = FALSE;
3453 memset(chl, 'O', sizeof(*chl));
3456 /* Update statistics */
3457 if (SILC_IS_LOCAL(client))
3458 server->stat.my_chanclients--;
3459 if (server->server_type == SILC_ROUTER) {
3460 server->stat.cell_chanclients--;
3461 server->stat.chanclients--;
3464 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3468 /* If there is not at least one local user on the channel then we don't
3469 need the channel entry anymore, we can remove it safely, unless the
3470 channel is permanent channel */
3471 if (server->server_type == SILC_SERVER &&
3472 !silc_server_channel_has_local(channel)) {
3473 /* Notify about leaving client if this channel has global users. */
3474 if (notify && channel->global_users)
3475 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3476 SILC_NOTIFY_TYPE_LEAVE, 1,
3477 clidp->data, silc_buffer_len(clidp));
3479 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3480 silc_server_channel_delete(server, channel);
3481 silc_buffer_free(clidp);
3485 /* Send notify to channel about client leaving the channel */
3487 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
3488 SILC_NOTIFY_TYPE_LEAVE, 1,
3489 clidp->data, silc_buffer_len(clidp));
3491 silc_buffer_free(clidp);
3495 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3496 function may be used only by router. In real SILC network all channels
3497 are created by routers thus this function is never used by normal
3500 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3501 SilcServerID *router_id,
3507 SilcChannelID *channel_id;
3508 SilcChannelEntry entry;
3509 SilcCipher send_key, receive_key;
3512 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3515 cipher = SILC_DEFAULT_CIPHER;
3517 hmac = SILC_DEFAULT_HMAC;
3519 /* Allocate cipher */
3520 if (!silc_cipher_alloc(cipher, &send_key))
3522 if (!silc_cipher_alloc(cipher, &receive_key)) {
3523 silc_cipher_free(send_key);
3528 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3529 silc_cipher_free(send_key);
3530 silc_cipher_free(receive_key);
3534 channel_name = strdup(channel_name);
3536 /* Create the channel ID */
3537 if (!silc_id_create_channel_id(server, router_id, server->rng,
3539 silc_free(channel_name);
3540 silc_cipher_free(send_key);
3541 silc_cipher_free(receive_key);
3542 silc_hmac_free(newhmac);
3546 /* Create the channel */
3547 entry = silc_idlist_add_channel(server->local_list, channel_name,
3548 SILC_CHANNEL_MODE_NONE, channel_id,
3549 NULL, send_key, receive_key, newhmac);
3551 silc_free(channel_name);
3552 silc_cipher_free(send_key);
3553 silc_cipher_free(receive_key);
3554 silc_hmac_free(newhmac);
3555 silc_free(channel_id);
3559 entry->cipher = strdup(cipher);
3560 entry->hmac_name = strdup(hmac);
3562 /* Now create the actual key material */
3563 if (!silc_server_create_channel_key(server, entry,
3564 silc_cipher_get_key_len(send_key) / 8)) {
3565 silc_idlist_del_channel(server->local_list, entry);
3569 /* Notify other routers about the new channel. We send the packet
3570 to our primary route. */
3572 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3573 channel_name, entry->id,
3574 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3577 /* Distribute to backup routers */
3578 if (broadcast && server->server_type == SILC_ROUTER) {
3580 unsigned char cid[32];
3581 SilcUInt32 name_len = strlen(channel_name);
3584 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3585 packet = silc_channel_payload_encode(channel_name, name_len,
3586 cid, id_len, entry->mode);
3587 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3588 packet->data, silc_buffer_len(packet), FALSE,
3590 silc_buffer_free(packet);
3593 server->stat.my_channels++;
3594 if (server->server_type == SILC_ROUTER) {
3595 server->stat.channels++;
3596 server->stat.cell_channels++;
3597 entry->users_resolved = TRUE;
3603 /* Same as above but creates the channel with Channel ID `channel_id. */
3606 silc_server_create_new_channel_with_id(SilcServer server,
3610 SilcChannelID *channel_id,
3613 SilcChannelEntry entry;
3614 SilcCipher send_key, receive_key;
3617 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3620 cipher = SILC_DEFAULT_CIPHER;
3622 hmac = SILC_DEFAULT_HMAC;
3624 /* Allocate cipher */
3625 if (!silc_cipher_alloc(cipher, &send_key))
3627 if (!silc_cipher_alloc(cipher, &receive_key)) {
3628 silc_cipher_free(send_key);
3633 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3634 silc_cipher_free(send_key);
3635 silc_cipher_free(receive_key);
3639 channel_name = strdup(channel_name);
3641 /* Create the channel */
3642 entry = silc_idlist_add_channel(server->local_list, channel_name,
3643 SILC_CHANNEL_MODE_NONE, channel_id,
3644 NULL, send_key, receive_key, newhmac);
3646 silc_cipher_free(send_key);
3647 silc_cipher_free(receive_key);
3648 silc_hmac_free(newhmac);
3649 silc_free(channel_name);
3653 /* Now create the actual key material */
3654 if (!silc_server_create_channel_key(server, entry,
3655 silc_cipher_get_key_len(send_key) / 8)) {
3656 silc_idlist_del_channel(server->local_list, entry);
3660 /* Notify other routers about the new channel. We send the packet
3661 to our primary route. */
3663 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3664 channel_name, entry->id,
3665 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3668 /* Distribute to backup routers */
3669 if (broadcast && server->server_type == SILC_ROUTER) {
3671 unsigned char cid[32];
3672 SilcUInt32 name_len = strlen(channel_name);
3675 silc_id_id2str(entry->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
3676 packet = silc_channel_payload_encode(channel_name, name_len,
3677 cid, id_len, entry->mode);
3678 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3679 packet->data, silc_buffer_len(packet), FALSE,
3681 silc_buffer_free(packet);
3684 server->stat.my_channels++;
3685 if (server->server_type == SILC_ROUTER) {
3686 server->stat.channels++;
3687 server->stat.cell_channels++;
3688 entry->users_resolved = TRUE;
3694 /* Channel's key re-key timeout callback. */
3696 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3698 SilcServer server = app_context;
3699 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3703 /* Return now if we are shutting down */
3704 if (server->server_shutdown)
3707 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3710 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3713 /* Generates new channel key. This is used to create the initial channel key
3714 but also to re-generate new key for channel. If `key_len' is provided
3715 it is the bytes of the key length. */
3717 SilcBool silc_server_create_channel_key(SilcServer server,
3718 SilcChannelEntry channel,
3722 unsigned char channel_key[32], hash[SILC_HASH_MAXLEN];
3725 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3726 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3730 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3732 if (!channel->send_key)
3733 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->send_key)) {
3734 channel->send_key = NULL;
3737 if (!channel->receive_key)
3738 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->receive_key)) {
3739 silc_cipher_free(channel->send_key);
3740 channel->send_key = channel->receive_key = NULL;
3746 else if (channel->key_len)
3747 len = channel->key_len / 8;
3749 len = silc_cipher_get_key_len(channel->send_key) / 8;
3751 /* Create channel key */
3752 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3755 silc_cipher_set_key(channel->send_key, channel_key, len * 8, TRUE);
3756 silc_cipher_set_key(channel->receive_key, channel_key, len * 8, FALSE);
3758 /* Remove old key if exists */
3760 memset(channel->key, 0, channel->key_len / 8);
3761 silc_free(channel->key);
3765 channel->key_len = len * 8;
3766 channel->key = silc_memdup(channel_key, len);
3767 memset(channel_key, 0, sizeof(channel_key));
3769 /* Generate HMAC key from the channel key data and set it */
3771 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3772 memset(channel->key, 0, channel->key_len / 8);
3773 silc_free(channel->key);
3774 silc_cipher_free(channel->send_key);
3775 silc_cipher_free(channel->receive_key);
3776 channel->send_key = channel->receive_key = NULL;
3779 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3780 silc_hmac_set_key(channel->hmac, hash,
3781 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3782 memset(hash, 0, sizeof(hash));
3784 if (server->server_type == SILC_ROUTER) {
3785 if (!channel->rekey)
3786 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3787 channel->rekey->channel = channel;
3788 channel->rekey->key_len = key_len;
3789 if (channel->rekey->task)
3790 silc_schedule_task_del(server->schedule, channel->rekey->task);
3792 channel->rekey->task =
3793 silc_schedule_task_add_timeout(server->schedule,
3794 silc_server_channel_key_rekey,
3795 (void *)channel->rekey,
3796 server->config->channel_rekey_secs, 0);
3802 /* Saves the channel key found in the encoded `key_payload' buffer. This
3803 function is used when we receive Channel Key Payload and also when we're
3804 processing JOIN command reply. Returns entry to the channel. */
3806 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3807 SilcBuffer key_payload,
3808 SilcChannelEntry channel)
3810 SilcChannelKeyPayload payload = NULL;
3812 unsigned char *tmp, hash[SILC_HASH_MAXLEN];
3816 /* Decode channel key payload */
3817 payload = silc_channel_key_payload_parse(key_payload->data,
3818 silc_buffer_len(key_payload));
3820 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3825 /* Get the channel entry */
3828 /* Get channel ID */
3829 tmp = silc_channel_key_get_id(payload, &tmp_len);
3830 if (!silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL, &id, sizeof(id))) {
3835 channel = silc_idlist_find_channel_by_id(server->local_list, &id, NULL);
3837 channel = silc_idlist_find_channel_by_id(server->global_list, &id, NULL);
3839 if (server->server_type == SILC_ROUTER)
3840 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3841 silc_id_render(&id, SILC_ID_CHANNEL)));
3847 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3849 tmp = silc_channel_key_get_key(payload, &tmp_len);
3855 cipher = silc_channel_key_get_cipher(payload, NULL);
3861 /* Remove old key if exists */
3863 memset(channel->key, 0, channel->key_len / 8);
3864 silc_free(channel->key);
3865 silc_cipher_free(channel->send_key);
3866 silc_cipher_free(channel->receive_key);
3869 /* Create new cipher */
3870 if (!silc_cipher_alloc(cipher, &channel->send_key)) {
3871 channel->send_key = NULL;
3875 if (!silc_cipher_alloc(cipher, &channel->receive_key)) {
3876 silc_cipher_free(channel->send_key);
3877 channel->send_key = channel->receive_key = NULL;
3882 if (channel->cipher)
3883 silc_free(channel->cipher);
3884 channel->cipher = strdup(cipher);
3887 channel->key_len = tmp_len * 8;
3888 channel->key = silc_memdup(tmp, tmp_len);
3889 silc_cipher_set_key(channel->send_key, tmp, channel->key_len, TRUE);
3890 silc_cipher_set_key(channel->receive_key, tmp, channel->key_len, FALSE);
3892 /* Generate HMAC key from the channel key data and set it */
3894 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
3895 memset(channel->key, 0, channel->key_len / 8);
3896 silc_free(channel->key);
3897 silc_cipher_free(channel->send_key);
3898 silc_cipher_free(channel->receive_key);
3899 channel->send_key = channel->receive_key = NULL;
3902 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3903 silc_hmac_set_key(channel->hmac, hash,
3904 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3906 memset(hash, 0, sizeof(hash));
3907 memset(tmp, 0, tmp_len);
3909 if (server->server_type == SILC_ROUTER) {
3910 if (!channel->rekey)
3911 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3912 channel->rekey->channel = channel;
3913 if (channel->rekey->task)
3914 silc_schedule_task_del(server->schedule, channel->rekey->task);
3916 channel->rekey->task =
3917 silc_schedule_task_add_timeout(server->schedule,
3918 silc_server_channel_key_rekey,
3919 (void *)channel->rekey,
3920 server->config->channel_rekey_secs, 0);
3925 silc_channel_key_payload_free(payload);
3930 /* Returns assembled of all servers in the given ID list. The packet's
3931 form is dictated by the New ID payload. */
3933 static void silc_server_announce_get_servers(SilcServer server,
3934 SilcServerEntry remote,
3936 SilcBuffer *servers,
3937 unsigned long creation_time)
3940 SilcIDCacheEntry id_cache;
3941 SilcServerEntry entry;
3944 /* Go through all clients in the list */
3945 if (silc_idcache_get_all(id_list->servers, &list)) {
3946 silc_list_start(list);
3947 while ((id_cache = silc_list_get(list))) {
3948 entry = (SilcServerEntry)id_cache->context;
3950 /* Do not announce the one we've sending our announcements and
3951 do not announce ourself. Also check the creation time if it's
3953 if ((entry == remote) || (entry == server->id_entry) ||
3954 (creation_time && entry->data.created < creation_time))
3957 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3959 *servers = silc_buffer_realloc(*servers,
3961 silc_buffer_truelen((*servers)) +
3962 silc_buffer_len(idp) :
3963 silc_buffer_len(idp)));
3964 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3965 silc_buffer_put(*servers, idp->data, silc_buffer_len(idp));
3966 silc_buffer_pull(*servers, silc_buffer_len(idp));
3967 silc_buffer_free(idp);
3973 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3979 p = silc_notify_payload_encode(notify, argc, ap);
3985 /* This function is used by router to announce existing servers to our
3986 primary router when we've connected to it. If `creation_time' is non-zero
3987 then only the servers that has been created after the `creation_time'
3988 will be announced. */
3990 void silc_server_announce_servers(SilcServer server, SilcBool global,
3991 unsigned long creation_time,
3992 SilcPacketStream remote)
3994 SilcBuffer servers = NULL;
3996 SILC_LOG_DEBUG(("Announcing servers"));
3998 /* Get servers in local list */
3999 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4000 server->local_list, &servers,
4004 /* Get servers in global list */
4005 silc_server_announce_get_servers(server, silc_packet_get_context(remote),
4006 server->global_list, &servers,
4010 silc_buffer_push(servers, servers->data - servers->head);
4011 SILC_LOG_HEXDUMP(("servers"), servers->data, silc_buffer_len(servers));
4013 /* Send the packet */
4014 silc_server_packet_send(server, remote,
4015 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4016 servers->data, silc_buffer_len(servers));
4018 silc_buffer_free(servers);
4022 /* Returns assembled packet of all clients in the given ID list. The
4023 packet's form is dictated by the New ID Payload. */
4025 static void silc_server_announce_get_clients(SilcServer server,
4027 SilcBuffer *clients,
4029 unsigned long creation_time)
4032 SilcIDCacheEntry id_cache;
4033 SilcClientEntry client;
4036 unsigned char mode[4];
4038 /* Go through all clients in the list */
4039 if (silc_idcache_get_all(id_list->clients, &list)) {
4040 silc_list_start(list);
4041 while ((id_cache = silc_list_get(list))) {
4042 client = (SilcClientEntry)id_cache->context;
4044 if (creation_time && client->data.created < creation_time)
4046 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4048 if (!client->connection && !client->router)
4051 SILC_LOG_DEBUG(("Announce Client ID %s",
4052 silc_id_render(client->id, SILC_ID_CLIENT)));
4054 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4056 *clients = silc_buffer_realloc(*clients,
4058 silc_buffer_truelen((*clients)) +
4059 silc_buffer_len(idp) :
4060 silc_buffer_len(idp)));
4061 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
4062 silc_buffer_put(*clients, idp->data, silc_buffer_len(idp));
4063 silc_buffer_pull(*clients, silc_buffer_len(idp));
4065 SILC_PUT32_MSB(client->mode, mode);
4067 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
4068 2, idp->data, silc_buffer_len(idp),
4070 *umodes = silc_buffer_realloc(*umodes,
4072 silc_buffer_truelen((*umodes)) +
4073 silc_buffer_len(tmp) :
4074 silc_buffer_len(tmp)));
4075 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
4076 silc_buffer_put(*umodes, tmp->data, silc_buffer_len(tmp));
4077 silc_buffer_pull(*umodes, silc_buffer_len(tmp));
4078 silc_buffer_free(tmp);
4080 silc_buffer_free(idp);
4085 /* This function is used to announce our existing clients to our router
4086 when we've connected to it. If `creation_time' is non-zero then only
4087 the clients that has been created after the `creation_time' will be
4090 void silc_server_announce_clients(SilcServer server,
4091 unsigned long creation_time,
4092 SilcPacketStream remote)
4094 SilcBuffer clients = NULL;
4095 SilcBuffer umodes = NULL;
4097 SILC_LOG_DEBUG(("Announcing clients"));
4099 /* Get clients in local list */
4100 silc_server_announce_get_clients(server, server->local_list,
4101 &clients, &umodes, creation_time);
4103 /* As router we announce our global list as well */
4104 if (server->server_type == SILC_ROUTER)
4105 silc_server_announce_get_clients(server, server->global_list,
4106 &clients, &umodes, creation_time);
4109 silc_buffer_push(clients, clients->data - clients->head);
4110 SILC_LOG_HEXDUMP(("clients"), clients->data, silc_buffer_len(clients));
4112 /* Send the packet */
4113 silc_server_packet_send(server, remote,
4114 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4115 clients->data, silc_buffer_len(clients));
4117 silc_buffer_free(clients);
4121 silc_buffer_push(umodes, umodes->data - umodes->head);
4122 SILC_LOG_HEXDUMP(("umodes"), umodes->data, silc_buffer_len(umodes));
4124 /* Send the packet */
4125 silc_server_packet_send(server, remote,
4126 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4127 umodes->data, silc_buffer_len(umodes));
4129 silc_buffer_free(umodes);
4133 /* Returns channel's topic for announcing it */
4135 void silc_server_announce_get_channel_topic(SilcServer server,
4136 SilcChannelEntry channel,
4141 if (channel->topic) {
4142 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4143 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4145 silc_buffer_len(chidp),
4147 strlen(channel->topic));
4148 silc_buffer_free(chidp);
4152 /* Returns channel's invite and ban lists */
4154 void silc_server_announce_get_inviteban(SilcServer server,
4155 SilcChannelEntry channel,
4159 SilcBuffer list, idp, idp2, tmp2;
4162 SilcHashTableList htl;
4163 const unsigned char a[1] = { 0x03 };
4165 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
4167 /* Encode invite list */
4168 if (channel->invite_list && silc_hash_table_count(channel->invite_list)) {
4169 list = silc_buffer_alloc_size(2);
4170 type = silc_hash_table_count(channel->invite_list);
4171 SILC_PUT16_MSB(type, list->data);
4172 silc_hash_table_list(channel->invite_list, &htl);
4173 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4174 list = silc_argument_payload_encode_one(list, tmp2->data,
4175 silc_buffer_len(tmp2),
4176 SILC_PTR_TO_32(ptype));
4177 silc_hash_table_list_reset(&htl);
4179 idp2 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4181 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_INVITE, 5,
4182 idp->data, silc_buffer_len(idp),
4183 channel->channel_name,
4184 strlen(channel->channel_name),
4185 idp2->data, silc_buffer_len(idp2),
4187 list->data, silc_buffer_len(list));
4188 silc_buffer_free(idp2);
4189 silc_buffer_free(list);
4192 /* Encode ban list */
4193 if (channel->ban_list && silc_hash_table_count(channel->ban_list)) {
4194 list = silc_buffer_alloc_size(2);
4195 type = silc_hash_table_count(channel->ban_list);
4196 SILC_PUT16_MSB(type, list->data);
4197 silc_hash_table_list(channel->ban_list, &htl);
4198 while (silc_hash_table_get(&htl, (void *)&ptype, (void *)&tmp2))
4199 list = silc_argument_payload_encode_one(list, tmp2->data,
4200 silc_buffer_len(tmp2),
4201 SILC_PTR_TO_32(ptype));
4202 silc_hash_table_list_reset(&htl);
4205 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_BAN, 3,
4206 idp->data, silc_buffer_len(idp),
4208 list->data, silc_buffer_len(list));
4209 silc_buffer_free(list);
4212 silc_buffer_free(idp);
4215 /* Returns assembled packets for channel users of the `channel'. */
4217 void silc_server_announce_get_channel_users(SilcServer server,
4218 SilcChannelEntry channel,
4219 SilcBuffer *channel_modes,
4220 SilcBuffer *channel_users,
4221 SilcBuffer *channel_users_modes)
4223 SilcChannelClientEntry chl;
4224 SilcHashTableList htl;
4225 SilcBuffer chidp, clidp, csidp;
4226 SilcBuffer tmp, fkey = NULL, chpklist;
4228 unsigned char mode[4], ulimit[4];
4231 SILC_LOG_DEBUG(("Start"));
4233 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4234 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4235 chpklist = silc_server_get_channel_pk_list(server, channel, TRUE, FALSE);
4238 SILC_PUT32_MSB(channel->mode, mode);
4239 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
4240 SILC_PUT32_MSB(channel->user_limit, ulimit);
4241 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4242 if (channel->founder_key)
4243 fkey = silc_public_key_payload_encode(channel->founder_key);
4245 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4247 silc_buffer_len(csidp),
4250 hmac, hmac ? strlen(hmac) : 0,
4251 channel->passphrase,
4252 channel->passphrase ?
4253 strlen(channel->passphrase) : 0,
4254 fkey ? fkey->data : NULL,
4255 fkey ? silc_buffer_len(fkey) : 0,
4256 chpklist ? chpklist->data : NULL,
4258 silc_buffer_len(chpklist) : 0,
4260 SILC_CHANNEL_MODE_ULIMIT ?
4263 SILC_CHANNEL_MODE_ULIMIT ?
4264 sizeof(ulimit) : 0));
4265 len = silc_buffer_len(tmp);
4267 silc_buffer_realloc(*channel_modes,
4269 silc_buffer_truelen((*channel_modes)) + len : len));
4270 silc_buffer_pull_tail(*channel_modes,
4271 ((*channel_modes)->end -
4272 (*channel_modes)->data));
4273 silc_buffer_put(*channel_modes, tmp->data, silc_buffer_len(tmp));
4274 silc_buffer_pull(*channel_modes, len);
4275 silc_buffer_free(tmp);
4276 silc_buffer_free(fkey);
4279 /* Now find all users on the channel */
4280 silc_hash_table_list(channel->user_list, &htl);
4281 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4282 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4284 SILC_LOG_DEBUG(("JOIN Client %s", silc_id_render(chl->client->id,
4288 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4290 silc_buffer_len(clidp),
4292 silc_buffer_len(chidp));
4293 len = silc_buffer_len(tmp);
4295 silc_buffer_realloc(*channel_users,
4297 silc_buffer_truelen((*channel_users)) + len : len));
4298 silc_buffer_pull_tail(*channel_users,
4299 ((*channel_users)->end -
4300 (*channel_users)->data));
4302 silc_buffer_put(*channel_users, tmp->data, silc_buffer_len(tmp));
4303 silc_buffer_pull(*channel_users, len);
4304 silc_buffer_free(tmp);
4306 /* CUMODE notify for mode change on the channel */
4307 SILC_PUT32_MSB(chl->mode, mode);
4308 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4309 fkey = silc_public_key_payload_encode(channel->founder_key);
4310 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4312 silc_buffer_len(csidp),
4315 silc_buffer_len(clidp),
4316 fkey ? fkey->data : NULL,
4317 fkey ? silc_buffer_len(fkey) : 0);
4318 len = silc_buffer_len(tmp);
4319 *channel_users_modes =
4320 silc_buffer_realloc(*channel_users_modes,
4321 (*channel_users_modes ?
4322 silc_buffer_truelen((*channel_users_modes)) +
4324 silc_buffer_pull_tail(*channel_users_modes,
4325 ((*channel_users_modes)->end -
4326 (*channel_users_modes)->data));
4328 silc_buffer_put(*channel_users_modes, tmp->data, silc_buffer_len(tmp));
4329 silc_buffer_pull(*channel_users_modes, len);
4330 silc_buffer_free(tmp);
4331 silc_buffer_free(fkey);
4333 silc_buffer_free(clidp);
4335 silc_hash_table_list_reset(&htl);
4336 silc_buffer_free(chidp);
4337 silc_buffer_free(csidp);
4340 /* Returns assembled packets for all channels and users on those channels
4341 from the given ID List. The packets are in the form dictated by the
4342 New Channel and New Channel User payloads. */
4344 void silc_server_announce_get_channels(SilcServer server,
4346 SilcBuffer *channels,
4347 SilcBuffer **channel_modes,
4348 SilcBuffer *channel_users,
4349 SilcBuffer **channel_users_modes,
4350 SilcUInt32 *channel_users_modes_c,
4351 SilcBuffer **channel_topics,
4352 SilcBuffer **channel_invites,
4353 SilcBuffer **channel_bans,
4354 SilcChannelID ***channel_ids,
4355 unsigned long creation_time)
4358 SilcIDCacheEntry id_cache;
4359 SilcChannelEntry channel;
4360 unsigned char cid[32];
4362 SilcUInt16 name_len;
4364 int i = *channel_users_modes_c;
4367 SILC_LOG_DEBUG(("Start"));
4369 /* Go through all channels in the list */
4370 if (silc_idcache_get_all(id_list->channels, &list)) {
4371 silc_list_start(list);
4372 while ((id_cache = silc_list_get(list))) {
4373 channel = (SilcChannelEntry)id_cache->context;
4375 if (creation_time && channel->created < creation_time)
4380 SILC_LOG_DEBUG(("Announce Channel ID %s",
4381 silc_id_render(channel->id, SILC_ID_CHANNEL)));
4383 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
4384 name_len = strlen(channel->channel_name);
4387 len = 4 + name_len + id_len + 4;
4389 silc_buffer_realloc(*channels,
4391 silc_buffer_truelen((*channels)) +
4393 silc_buffer_pull_tail(*channels,
4394 ((*channels)->end - (*channels)->data));
4395 silc_buffer_format(*channels,
4396 SILC_STR_UI_SHORT(name_len),
4397 SILC_STR_UI_XNSTRING(channel->channel_name,
4399 SILC_STR_UI_SHORT(id_len),
4400 SILC_STR_UI_XNSTRING(cid, id_len),
4401 SILC_STR_UI_INT(channel->mode),
4403 silc_buffer_pull(*channels, len);
4406 if (creation_time && channel->updated < creation_time)
4412 /* Channel user modes */
4413 *channel_users_modes = silc_realloc(*channel_users_modes,
4414 sizeof(**channel_users_modes) *
4416 (*channel_users_modes)[i] = NULL;
4417 *channel_modes = silc_realloc(*channel_modes,
4418 sizeof(**channel_modes) * (i + 1));
4419 (*channel_modes)[i] = NULL;
4420 *channel_ids = silc_realloc(*channel_ids,
4421 sizeof(**channel_ids) * (i + 1));
4422 (*channel_ids)[i] = NULL;
4423 silc_server_announce_get_channel_users(server, channel,
4424 &(*channel_modes)[i],
4426 &(*channel_users_modes)[i]);
4427 (*channel_ids)[i] = channel->id;
4429 /* Channel's topic */
4430 *channel_topics = silc_realloc(*channel_topics,
4431 sizeof(**channel_topics) * (i + 1));
4432 (*channel_topics)[i] = NULL;
4433 silc_server_announce_get_channel_topic(server, channel,
4434 &(*channel_topics)[i]);
4436 /* Channel's invite and ban list */
4437 *channel_invites = silc_realloc(*channel_invites,
4438 sizeof(**channel_invites) * (i + 1));
4439 (*channel_invites)[i] = NULL;
4440 *channel_bans = silc_realloc(*channel_bans,
4441 sizeof(**channel_bans) * (i + 1));
4442 (*channel_bans)[i] = NULL;
4443 silc_server_announce_get_inviteban(server, channel,
4444 &(*channel_invites)[i],
4445 &(*channel_bans)[i]);
4447 (*channel_users_modes_c)++;
4455 /* This function is used to announce our existing channels to our router
4456 when we've connected to it. This also announces the users on the
4457 channels to the router. If the `creation_time' is non-zero only the
4458 channels that was created after the `creation_time' are announced.
4459 Note that the channel users are still announced even if the `creation_time'
4462 void silc_server_announce_channels(SilcServer server,
4463 unsigned long creation_time,
4464 SilcPacketStream remote)
4466 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4467 SilcBuffer *channel_users_modes = NULL;
4468 SilcBuffer *channel_topics = NULL;
4469 SilcBuffer *channel_invites = NULL;
4470 SilcBuffer *channel_bans = NULL;
4471 SilcUInt32 channel_users_modes_c = 0;
4472 SilcChannelID **channel_ids = NULL;
4474 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4476 /* Get channels and channel users in local list */
4477 silc_server_announce_get_channels(server, server->local_list,
4478 &channels, &channel_modes,
4480 &channel_users_modes,
4481 &channel_users_modes_c,
4485 &channel_ids, creation_time);
4487 /* Get channels and channel users in global list */
4488 if (server->server_type != SILC_SERVER)
4489 silc_server_announce_get_channels(server, server->global_list,
4490 &channels, &channel_modes,
4492 &channel_users_modes,
4493 &channel_users_modes_c,
4497 &channel_ids, creation_time);
4500 silc_buffer_push(channels, channels->data - channels->head);
4501 SILC_LOG_HEXDUMP(("channels"), channels->data, silc_buffer_len(channels));
4503 /* Send the packet */
4504 silc_server_packet_send(server, remote,
4505 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4506 channels->data, silc_buffer_len(channels));
4508 silc_buffer_free(channels);
4511 if (channel_users) {
4512 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4513 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4514 silc_buffer_len(channel_users));
4516 /* Send the packet */
4517 silc_server_packet_send(server, remote,
4518 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4519 channel_users->data, silc_buffer_len(channel_users));
4521 silc_buffer_free(channel_users);
4524 if (channel_modes) {
4527 for (i = 0; i < channel_users_modes_c; i++) {
4528 if (!channel_modes[i])
4530 silc_buffer_push(channel_modes[i],
4531 channel_modes[i]->data -
4532 channel_modes[i]->head);
4533 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4534 silc_buffer_len(channel_modes[i]));
4535 silc_server_packet_send_dest(server, remote,
4536 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4537 channel_ids[i], SILC_ID_CHANNEL,
4538 channel_modes[i]->data,
4539 silc_buffer_len(channel_modes[i]));
4540 silc_buffer_free(channel_modes[i]);
4542 silc_free(channel_modes);
4545 if (channel_users_modes) {
4548 for (i = 0; i < channel_users_modes_c; i++) {
4549 if (!channel_users_modes[i])
4551 silc_buffer_push(channel_users_modes[i],
4552 channel_users_modes[i]->data -
4553 channel_users_modes[i]->head);
4554 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4555 silc_buffer_len(channel_users_modes[i]));
4556 silc_server_packet_send_dest(server, remote,
4557 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4558 channel_ids[i], SILC_ID_CHANNEL,
4559 channel_users_modes[i]->data,
4560 silc_buffer_len(channel_users_modes[i]));
4561 silc_buffer_free(channel_users_modes[i]);
4563 silc_free(channel_users_modes);
4566 if (channel_topics) {
4569 for (i = 0; i < channel_users_modes_c; i++) {
4570 if (!channel_topics[i])
4573 silc_buffer_push(channel_topics[i],
4574 channel_topics[i]->data -
4575 channel_topics[i]->head);
4576 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4577 silc_buffer_len(channel_topics[i]));
4578 silc_server_packet_send_dest(server, remote,
4579 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4580 channel_ids[i], SILC_ID_CHANNEL,
4581 channel_topics[i]->data,
4582 silc_buffer_len(channel_topics[i]));
4583 silc_buffer_free(channel_topics[i]);
4585 silc_free(channel_topics);
4588 if (channel_invites) {
4591 for (i = 0; i < channel_users_modes_c; i++) {
4592 if (!channel_invites[i])
4595 silc_buffer_push(channel_invites[i],
4596 channel_invites[i]->data -
4597 channel_invites[i]->head);
4598 SILC_LOG_HEXDUMP(("channel invite list"), channel_invites[i]->data,
4599 silc_buffer_len(channel_invites[i]));
4600 silc_server_packet_send_dest(server, remote,
4601 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4602 channel_ids[i], SILC_ID_CHANNEL,
4603 channel_invites[i]->data,
4604 silc_buffer_len(channel_invites[i]));
4605 silc_buffer_free(channel_invites[i]);
4607 silc_free(channel_invites);
4613 for (i = 0; i < channel_users_modes_c; i++) {
4614 if (!channel_bans[i])
4617 silc_buffer_push(channel_bans[i],
4618 channel_bans[i]->data -
4619 channel_bans[i]->head);
4620 SILC_LOG_HEXDUMP(("channel ban list"), channel_bans[i]->data,
4621 silc_buffer_len(channel_bans[i]));
4622 silc_server_packet_send_dest(server, remote,
4623 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4624 channel_ids[i], SILC_ID_CHANNEL,
4625 channel_bans[i]->data,
4626 silc_buffer_len(channel_bans[i]));
4627 silc_buffer_free(channel_bans[i]);
4629 silc_free(channel_bans);
4632 silc_free(channel_ids);
4635 /* Announces WATCH list. */
4637 void silc_server_announce_watches(SilcServer server,
4638 SilcPacketStream remote)
4640 SilcHashTableList htl;
4641 SilcBuffer buffer, idp, args, pkp;
4642 SilcClientEntry client;
4645 SILC_LOG_DEBUG(("Announcing watch list"));
4647 /* XXX because way we save the nicks (hash) we cannot announce them. */
4649 /* XXX we should send all public keys in one command if client is
4650 watching more than one key */
4651 silc_hash_table_list(server->watcher_list_pk, &htl);
4652 while (silc_hash_table_get(&htl, &key, (void *)&client)) {
4653 if (!client || !client->id)
4656 server->stat.commands_sent++;
4658 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
4659 args = silc_buffer_alloc_size(2);
4660 silc_buffer_format(args,
4661 SILC_STR_UI_SHORT(1),
4663 pkp = silc_public_key_payload_encode(key);
4664 args = silc_argument_payload_encode_one(args, pkp->data,
4665 silc_buffer_len(pkp), 0x00);
4666 buffer = silc_command_payload_encode_va(SILC_COMMAND_WATCH,
4667 ++server->cmd_ident, 2,
4668 1, idp->data, silc_buffer_len(idp),
4670 silc_buffer_len(args));
4673 silc_server_packet_send(server, remote, SILC_PACKET_COMMAND, 0,
4674 buffer->data, silc_buffer_len(buffer));
4676 silc_buffer_free(pkp);
4677 silc_buffer_free(args);
4678 silc_buffer_free(idp);
4679 silc_buffer_free(buffer);
4681 silc_hash_table_list_reset(&htl);
4684 /* Assembles user list and users mode list from the `channel'. */
4686 SilcBool silc_server_get_users_on_channel(SilcServer server,
4687 SilcChannelEntry channel,
4688 SilcBuffer *user_list,
4689 SilcBuffer *mode_list,
4690 SilcUInt32 *user_count)
4692 SilcChannelClientEntry chl;
4693 SilcHashTableList htl;
4694 SilcBuffer client_id_list;
4695 SilcBuffer client_mode_list;
4697 SilcUInt32 list_count = 0, len = 0;
4699 if (!silc_hash_table_count(channel->user_list))
4702 silc_hash_table_list(channel->user_list, &htl);
4703 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4704 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4705 silc_hash_table_list_reset(&htl);
4707 client_id_list = silc_buffer_alloc(len);
4709 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4710 silc_buffer_pull_tail(client_id_list, silc_buffer_truelen(client_id_list));
4711 silc_buffer_pull_tail(client_mode_list,
4712 silc_buffer_truelen(client_mode_list));
4714 silc_hash_table_list(channel->user_list, &htl);
4715 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4717 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4718 silc_buffer_put(client_id_list, idp->data, silc_buffer_len(idp));
4719 silc_buffer_pull(client_id_list, silc_buffer_len(idp));
4720 silc_buffer_free(idp);
4722 /* Client's mode on channel */
4723 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4724 silc_buffer_pull(client_mode_list, 4);
4728 silc_hash_table_list_reset(&htl);
4729 silc_buffer_push(client_id_list,
4730 client_id_list->data - client_id_list->head);
4731 silc_buffer_push(client_mode_list,
4732 client_mode_list->data - client_mode_list->head);
4734 *user_list = client_id_list;
4735 *mode_list = client_mode_list;
4736 *user_count = list_count;
4740 /* Saves users and their modes to the `channel'. */
4742 void silc_server_save_users_on_channel(SilcServer server,
4743 SilcPacketStream sock,
4744 SilcChannelEntry channel,
4745 SilcClientID *noadd,
4746 SilcBuffer user_list,
4747 SilcBuffer mode_list,
4748 SilcUInt32 user_count)
4754 SilcClientEntry client;
4755 SilcIDCacheEntry cache;
4756 SilcChannelClientEntry chl;
4758 SILC_LOG_DEBUG(("Saving %d users on %s channel", user_count,
4759 channel->channel_name));
4761 for (i = 0; i < user_count; i++) {
4763 SILC_GET16_MSB(idp_len, user_list->data + 2);
4765 if (!silc_id_payload_parse_id(user_list->data, idp_len, &id))
4767 silc_buffer_pull(user_list, idp_len);
4770 SILC_GET32_MSB(mode, mode_list->data);
4771 silc_buffer_pull(mode_list, 4);
4773 if (noadd && SILC_ID_CLIENT_COMPARE(&id.u.client_id, noadd))
4778 /* Check if we have this client cached already. */
4779 client = silc_idlist_find_client_by_id(server->local_list,
4781 server->server_type, &cache);
4783 client = silc_idlist_find_client_by_id(server->global_list,
4785 server->server_type, &cache);
4787 /* If router did not find such Client ID in its lists then this must
4788 be bogus client or some router in the net is buggy. */
4789 if (server->server_type != SILC_SERVER)
4792 /* We don't have that client anywhere, add it. The client is added
4793 to global list since server didn't have it in the lists so it must be
4795 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4796 silc_id_dup(&id.u.client_id,
4798 silc_packet_get_context(sock),
4801 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4805 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4808 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4809 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4810 "%s", channel->channel_name));
4814 if (!silc_server_client_on_channel(client, channel, &chl)) {
4815 /* Client was not on the channel, add it. */
4816 chl = silc_calloc(1, sizeof(*chl));
4817 chl->client = client;
4819 chl->channel = channel;
4820 silc_hash_table_add(channel->user_list, chl->client, chl);
4821 silc_hash_table_add(client->channels, chl->channel, chl);
4822 channel->user_count++;
4830 /* Saves channels and channels user modes to the `client'. Removes
4831 the client from those channels that are not sent in the list but
4834 void silc_server_save_user_channels(SilcServer server,
4835 SilcPacketStream sock,
4836 SilcClientEntry client,
4837 SilcBuffer channels,
4838 SilcBuffer channels_user_modes)
4841 SilcUInt32 *chumodes;
4842 SilcChannelPayload entry;
4843 SilcChannelEntry channel;
4844 SilcChannelID channel_id;
4845 SilcChannelClientEntry chl;
4846 SilcHashTable ht = NULL;
4847 SilcHashTableList htl;
4851 if (!channels || !channels_user_modes ||
4852 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4855 ch = silc_channel_payload_parse_list(channels->data,
4856 silc_buffer_len(channels));
4857 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4859 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4860 NULL, NULL, NULL, TRUE);
4861 silc_dlist_start(ch);
4862 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4863 /* Check if we have this channel, and add it if we don't have it.
4864 Also add the client on the channel unless it is there already. */
4865 if (!silc_channel_get_id_parse(entry, &channel_id))
4867 channel = silc_idlist_find_channel_by_id(server->local_list,
4870 channel = silc_idlist_find_channel_by_id(server->global_list,
4873 if (server->server_type != SILC_SERVER) {
4878 /* We don't have that channel anywhere, add it. */
4879 name = silc_channel_get_name(entry, NULL);
4880 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4881 silc_id_dup(&channel_id,
4883 server->router, NULL, NULL, 0);
4890 channel->mode = silc_channel_get_mode(entry);
4892 /* Add the client on the channel */
4893 if (!silc_server_client_on_channel(client, channel, &chl)) {
4894 chl = silc_calloc(1, sizeof(*chl));
4895 chl->client = client;
4896 chl->mode = chumodes[i++];
4897 chl->channel = channel;
4898 silc_hash_table_add(channel->user_list, chl->client, chl);
4899 silc_hash_table_add(client->channels, chl->channel, chl);
4900 channel->user_count++;
4903 chl->mode = chumodes[i++];
4906 silc_hash_table_add(ht, channel, channel);
4908 silc_channel_payload_list_free(ch);
4909 silc_free(chumodes);
4913 /* Go through the list again and remove client from channels that
4914 are no part of the list. */
4916 silc_hash_table_list(client->channels, &htl);
4917 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4918 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4919 silc_hash_table_del(chl->channel->user_list, chl->client);
4920 silc_hash_table_del(chl->client->channels, chl->channel);
4924 silc_hash_table_list_reset(&htl);
4925 silc_hash_table_free(ht);
4927 silc_hash_table_list(client->channels, &htl);
4928 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4929 silc_hash_table_del(chl->channel->user_list, chl->client);
4930 silc_hash_table_del(chl->client->channels, chl->channel);
4933 silc_hash_table_list_reset(&htl);
4937 /* Lookups route to the client indicated by the `id_data'. The connection
4938 object and internal data object is returned. Returns NULL if route
4939 could not be found to the client. If the `client_id' is specified then
4940 it is used and the `id_data' is ignored. */
4943 silc_server_get_client_route(SilcServer server,
4944 unsigned char *id_data,
4946 SilcClientID *client_id,
4947 SilcIDListData *idata,
4948 SilcClientEntry *client_entry)
4950 SilcClientID *id, clid;
4951 SilcClientEntry client;
4953 SILC_LOG_DEBUG(("Start"));
4956 *client_entry = NULL;
4958 /* Decode destination Client ID */
4960 if (!silc_id_str2id(id_data, id_len, SILC_ID_CLIENT, &clid, sizeof(clid)))
4962 id = silc_id_dup(&clid, SILC_ID_CLIENT);
4964 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4967 /* If the destination belongs to our server we don't have to route
4968 the packet anywhere but to send it to the local destination. */
4969 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4973 /* If we are router and the client has router then the client is in
4974 our cell but not directly connected to us. */
4975 if (server->server_type == SILC_ROUTER && client->router) {
4976 /* We are of course in this case the client's router thus the route
4977 to the client is the server who owns the client. So, we will send
4978 the packet to that server. */
4980 *idata = (SilcIDListData)client->router;
4981 return client->router->connection;
4984 /* Seems that client really is directly connected to us */
4986 *idata = (SilcIDListData)client;
4988 *client_entry = client;
4989 return client->connection;
4992 /* Destination belongs to someone not in this server. If we are normal
4993 server our action is to send the packet to our router. */
4994 if (server->server_type != SILC_ROUTER && !server->standalone) {
4997 *idata = (SilcIDListData)server->router;
4998 return SILC_PRIMARY_ROUTE(server);
5001 /* We are router and we will perform route lookup for the destination
5002 and send the packet to fastest route. */
5003 if (server->server_type == SILC_ROUTER && !server->standalone) {
5004 /* Check first that the ID is valid */
5005 client = silc_idlist_find_client_by_id(server->global_list, id,
5008 SilcPacketStream dst_sock;
5010 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
5013 if (idata && dst_sock)
5014 *idata = silc_packet_get_context(dst_sock);
5023 /* Encodes and returns channel list of channels the `client' has joined.
5024 Secret channels are not put to the list. */
5026 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
5027 SilcClientEntry client,
5028 SilcBool get_private,
5029 SilcBool get_secret,
5030 SilcBuffer *user_mode_list)
5032 SilcBuffer buffer = NULL;
5033 SilcChannelEntry channel;
5034 SilcChannelClientEntry chl;
5035 SilcHashTableList htl;
5036 unsigned char cid[32];
5038 SilcUInt16 name_len;
5042 *user_mode_list = NULL;
5044 silc_hash_table_list(client->channels, &htl);
5045 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
5046 channel = chl->channel;
5048 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
5050 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
5053 silc_id_id2str(channel->id, SILC_ID_CHANNEL, cid, sizeof(cid), &id_len);
5054 name_len = strlen(channel->channel_name);
5056 len = 4 + name_len + id_len + 4;
5057 buffer = silc_buffer_realloc(buffer,
5059 silc_buffer_truelen(buffer) + len : len));
5060 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
5061 silc_buffer_format(buffer,
5062 SILC_STR_UI_SHORT(name_len),
5063 SILC_STR_DATA(channel->channel_name, name_len),
5064 SILC_STR_UI_SHORT(id_len),
5065 SILC_STR_DATA(cid, id_len),
5066 SILC_STR_UI_INT(chl->channel->mode),
5068 silc_buffer_pull(buffer, len);
5070 if (user_mode_list) {
5072 silc_buffer_realloc(*user_mode_list,
5074 silc_buffer_truelen((*user_mode_list)) + 4 : 4));
5075 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
5076 (*user_mode_list)->data));
5077 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
5078 silc_buffer_pull(*user_mode_list, 4);
5081 silc_hash_table_list_reset(&htl);
5084 silc_buffer_push(buffer, buffer->data - buffer->head);
5085 if (user_mode_list && *user_mode_list)
5086 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
5087 (*user_mode_list)->head));
5092 /* Task callback used to retrieve network statistical information from
5093 router server once in a while. */
5095 SILC_TASK_CALLBACK(silc_server_get_stats)
5097 SilcServer server = (SilcServer)context;
5098 SilcBuffer idp, packet;
5100 if (!server->standalone) {
5101 SILC_LOG_DEBUG(("Retrieving stats from router"));
5102 server->stat.commands_sent++;
5103 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
5105 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
5106 ++server->cmd_ident, 1,
5108 silc_buffer_len(idp));
5109 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
5110 SILC_PACKET_COMMAND, 0, packet->data,
5111 silc_buffer_len(packet));
5112 silc_buffer_free(packet);
5113 silc_buffer_free(idp);
5117 silc_schedule_task_add_timeout(server->schedule, silc_server_get_stats,