5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 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; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_rehash_close_connection);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry);
33 SILC_TASK_CALLBACK(silc_server_connect_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
36 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
39 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
40 SILC_TASK_CALLBACK(silc_server_packet_process);
41 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
42 SILC_TASK_CALLBACK(silc_server_close_connection_final);
43 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
44 SILC_TASK_CALLBACK(silc_server_timeout_remote);
45 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
46 SILC_TASK_CALLBACK(silc_server_failure_callback);
47 SILC_TASK_CALLBACK(silc_server_rekey_callback);
48 SILC_TASK_CALLBACK(silc_server_get_stats);
50 /* Allocates a new SILC server object. This has to be done before the server
51 can be used. After allocation one must call silc_server_init to initialize
52 the server. The new allocated server object is returned to the new_server
55 int silc_server_alloc(SilcServer *new_server)
59 SILC_LOG_DEBUG(("Allocating new server object"));
61 server = silc_calloc(1, sizeof(*server));
62 server->server_type = SILC_SERVER;
63 server->standalone = TRUE;
64 server->local_list = silc_calloc(1, sizeof(*server->local_list));
65 server->global_list = silc_calloc(1, sizeof(*server->global_list));
66 server->pending_commands = silc_dlist_init();
68 server->sim = silc_dlist_init();
76 /* Free's the SILC server object. This is called at the very end before
79 void silc_server_free(SilcServer server)
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_server_config_unref(&server->config_ref);
98 silc_rng_free(server->rng);
100 silc_pkcs_free(server->pkcs);
101 if (server->public_key)
102 silc_pkcs_public_key_free(server->public_key);
103 if (server->private_key)
104 silc_pkcs_private_key_free(server->private_key);
105 if (server->pending_commands)
106 silc_dlist_uninit(server->pending_commands);
107 if (server->id_entry)
108 silc_idlist_del_server(server->local_list, server->id_entry);
110 silc_idcache_free(server->local_list->clients);
111 silc_idcache_free(server->local_list->servers);
112 silc_idcache_free(server->local_list->channels);
113 silc_idcache_free(server->global_list->clients);
114 silc_idcache_free(server->global_list->servers);
115 silc_idcache_free(server->global_list->channels);
116 silc_hash_table_free(server->watcher_list);
118 silc_hash_free(server->md5hash);
119 silc_hash_free(server->sha1hash);
120 silc_hmac_unregister_all();
121 silc_hash_unregister_all();
122 silc_cipher_unregister_all();
123 silc_pkcs_unregister_all();
125 silc_free(server->local_list);
126 silc_free(server->global_list);
127 silc_free(server->server_name);
128 silc_free(server->id_string);
129 silc_free(server->purge_i);
130 silc_free(server->purge_g);
134 /* Creates a new server listener. */
136 static bool silc_server_listen(SilcServer server, const char *server_ip,
137 SilcUInt16 port, int *sock)
139 *sock = silc_net_create_server(port, server_ip);
141 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
148 /* Adds a secondary listener. */
150 bool silc_server_init_secondary(SilcServer server)
152 int sock = 0, sock_list[server->config->param.connections_max];
153 SilcSocketConnection newsocket = NULL;
154 SilcServerConfigServerInfoInterface *interface;
156 for (interface = server->config->server_info->secondary; interface;
157 interface = interface->next, sock++) {
159 if (!silc_server_listen(server,
160 interface->server_ip, interface->port, &sock_list[sock]))
163 /* Set socket to non-blocking mode */
164 silc_net_set_socket_nonblock(sock_list[sock]);
166 /* Add ourselves also to the socket table. The entry allocated above
167 is sent as argument for fast referencing in the future. */
168 silc_socket_alloc(sock_list[sock],
169 SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
170 server->sockets[sock_list[sock]] = newsocket;
171 SILC_SET_LISTENER(newsocket);
173 /* Perform name and address lookups to resolve the listenning address
175 if (!silc_net_check_local_by_sock(sock_list[sock], &newsocket->hostname,
177 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
179 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
180 newsocket->hostname ? newsocket->hostname :
181 newsocket->ip ? newsocket->ip : ""));
182 server->stat.conn_failures++;
185 if (!newsocket->hostname)
186 newsocket->hostname = strdup(newsocket->ip);
188 newsocket->port = silc_net_get_local_port(sock);
190 newsocket->user_data = (void *)server->id_entry;
191 silc_schedule_task_add(server->schedule, sock_list[sock],
192 silc_server_accept_new_connection,
193 (void *)server, 0, 0,
195 SILC_TASK_PRI_NORMAL);
201 do silc_net_close_server(sock_list[sock--]); while (sock >= 0);
205 /* Initializes the entire SILC server. This is called always before running
206 the server. This is called only once at the initialization of the program.
207 This binds the server to its listenning port. After this function returns
208 one should call silc_server_run to start the server. This returns TRUE
209 when everything is ok to run the server. Configuration file must be
210 read and parsed before calling this. */
212 bool silc_server_init(SilcServer server)
216 SilcServerEntry id_entry;
217 SilcIDListPurge purge;
218 SilcSocketConnection newsocket = NULL;
220 SILC_LOG_DEBUG(("Initializing server"));
222 server->starttime = time(NULL);
224 /* Take config object for us */
225 silc_server_config_ref(&server->config_ref, server->config,
228 /* Steal public and private key from the config object */
229 server->public_key = server->config->server_info->public_key;
230 server->private_key = server->config->server_info->private_key;
231 server->config->server_info->public_key = NULL;
232 server->config->server_info->private_key = NULL;
234 /* Register all configured ciphers, PKCS and hash functions. */
235 if (!silc_server_config_register_ciphers(server))
236 silc_cipher_register_default();
237 if (!silc_server_config_register_pkcs(server))
238 silc_pkcs_register_default();
239 if (!silc_server_config_register_hashfuncs(server))
240 silc_hash_register_default();
241 if (!silc_server_config_register_hmacs(server))
242 silc_hmac_register_default();
244 /* Initialize random number generator for the server. */
245 server->rng = silc_rng_alloc();
246 silc_rng_init(server->rng);
247 silc_rng_global_init(server->rng);
249 /* Initialize hash functions for server to use */
250 silc_hash_alloc("md5", &server->md5hash);
251 silc_hash_alloc("sha1", &server->sha1hash);
253 /* Allocate PKCS context for local public and private keys */
254 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
256 silc_pkcs_public_key_set(server->pkcs, server->public_key);
257 silc_pkcs_private_key_set(server->pkcs, server->private_key);
259 /* Initialize the scheduler */
260 server->schedule = silc_schedule_init(server->config->param.connections_max);
261 if (!server->schedule)
264 /* First, register log files configuration for error output */
265 silc_server_config_setlogfiles(server);
267 /* Initialize ID caches */
268 server->local_list->clients =
269 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
270 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
271 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
273 /* These are allocated for normal server as well as these hold some
274 global information that the server has fetched from its router. For
275 router these are used as they are supposed to be used on router. */
276 server->global_list->clients =
277 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
278 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
279 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
281 /* Init watcher list */
282 server->watcher_list =
283 silc_hash_table_alloc(1, silc_hash_client_id_hash, NULL,
284 silc_hash_data_compare, (void *)CLIENTID_HASH_LEN,
286 if (!server->watcher_list)
289 /* Create a listening server */
290 if (!silc_server_listen(server,
291 server->config->server_info->primary == NULL ? NULL :
292 server->config->server_info->primary->server_ip,
293 server->config->server_info->primary == NULL ? 0 :
294 server->config->server_info->primary->port,
298 /* Set socket to non-blocking mode */
299 silc_net_set_socket_nonblock(sock);
302 /* Allocate the entire socket list that is used in server. Eventually
303 all connections will have entry in this table (it is a table of
304 pointers to the actual object that is allocated individually
306 server->sockets = silc_calloc(server->config->param.connections_max,
307 sizeof(*server->sockets));
308 if (!server->sockets)
311 /* Add ourselves also to the socket table. The entry allocated above
312 is sent as argument for fast referencing in the future. */
313 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
314 server->sockets[sock] = newsocket;
315 SILC_SET_LISTENER(newsocket);
317 /* Perform name and address lookups to resolve the listenning address
319 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
321 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
323 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
324 newsocket->hostname ? newsocket->hostname :
325 newsocket->ip ? newsocket->ip : ""));
326 server->stat.conn_failures++;
329 if (!newsocket->hostname)
330 newsocket->hostname = strdup(newsocket->ip);
332 newsocket->port = silc_net_get_local_port(sock);
334 /* Create a Server ID for the server. */
335 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
340 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
341 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
342 server->server_name = server->config->server_info->server_name;
343 server->config->server_info->server_name = NULL;
345 /* Add ourselves to the server list. We don't have a router yet
346 beacuse we haven't established a route yet. It will be done later.
347 For now, NULL is sent as router. This allocates new entry to
350 silc_idlist_add_server(server->local_list, strdup(server->server_name),
351 server->server_type, server->id, NULL, NULL);
353 SILC_LOG_ERROR(("Could not add ourselves to cache"));
356 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
358 /* Put the allocated socket pointer also to the entry allocated above
359 for fast back-referencing to the socket list. */
360 newsocket->user_data = (void *)id_entry;
361 id_entry->connection = (void *)newsocket;
362 server->id_entry = id_entry;
364 /* Register protocols */
365 silc_server_protocols_register();
367 /* Add the first task to the scheduler. This is task that is executed by
368 timeout. It expires as soon as the caller calls silc_server_run. This
369 task performs authentication protocol and key exchange with our
371 silc_schedule_task_add(server->schedule, 0,
372 silc_server_connect_to_router,
373 (void *)server, 0, 1,
375 SILC_TASK_PRI_NORMAL);
377 /* Add listener task to the scheduler. This task receives new connections
378 to the server. This task remains on the queue until the end of the
380 silc_schedule_task_add(server->schedule, sock,
381 silc_server_accept_new_connection,
382 (void *)server, 0, 0,
384 SILC_TASK_PRI_NORMAL);
386 if (silc_server_init_secondary(server) == FALSE)
389 server->listenning = TRUE;
391 /* If server connections has been configured then we must be router as
392 normal server cannot have server connections, only router connections. */
393 if (server->config->servers) {
394 SilcServerConfigServer *ptr = server->config->servers;
396 server->server_type = SILC_ROUTER;
398 if (ptr->backup_router) {
399 server->server_type = SILC_BACKUP_ROUTER;
400 server->backup_router = TRUE;
401 server->id_entry->server_type = SILC_BACKUP_ROUTER;
408 /* Register the ID Cache purge task. This periodically purges the ID cache
409 and removes the expired cache entries. */
411 /* Clients local list */
412 server->purge_i = purge = silc_calloc(1, sizeof(*purge));
413 purge->cache = server->local_list->clients;
414 purge->schedule = server->schedule;
415 purge->timeout = 600;
416 silc_schedule_task_add(purge->schedule, 0,
418 (void *)purge, purge->timeout, 0,
419 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
421 /* Clients global list */
422 server->purge_g = purge = silc_calloc(1, sizeof(*purge));
423 purge->cache = server->global_list->clients;
424 purge->schedule = server->schedule;
425 purge->timeout = 300;
426 silc_schedule_task_add(purge->schedule, 0,
428 (void *)purge, purge->timeout, 0,
429 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
431 /* If we are normal server we'll retrieve network statisticial information
432 once in a while from the router. */
433 if (server->server_type == SILC_SERVER)
434 silc_schedule_task_add(purge->schedule, 0, silc_server_get_stats,
435 server, 10, 0, SILC_TASK_TIMEOUT,
438 if (server->server_type == SILC_ROUTER)
439 server->stat.routers++;
441 SILC_LOG_DEBUG(("Server initialized"));
443 /* We are done here, return succesfully */
447 silc_server_config_unref(&server->config_ref);
448 silc_net_close_server(sock);
452 /* Task callback to close a socket connection after rehash */
454 SILC_TASK_CALLBACK(silc_server_rehash_close_connection)
456 SilcServer server = context;
457 SilcSocketConnection sock = server->sockets[fd];
462 SILC_LOG_INFO(("Closing connection %s:%d [%s]: connection is unconfigured",
463 sock->hostname, sock->port,
464 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
465 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
466 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
468 silc_schedule_task_del_by_context(server->schedule, sock);
469 silc_server_disconnect_remote(server, sock,
470 SILC_STATUS_ERR_BANNED_FROM_SERVER,
471 "This connection is removed from "
474 silc_server_free_sock_user_data(server, sock, NULL);
477 /* This function basically reads the config file again and switches the config
478 object pointed by the server object. After that, we have to fix various
479 things such as the server_name and the listening ports.
480 Keep in mind that we no longer have the root privileges at this point. */
482 bool silc_server_rehash(SilcServer server)
484 SilcServerConfig newconfig;
486 SILC_LOG_INFO(("Rehashing server"));
488 /* Reset the logging system */
489 silc_log_quick = TRUE;
490 silc_log_flush_all();
492 /* Start the main rehash phase (read again the config file) */
493 newconfig = silc_server_config_alloc(server->config_file);
495 SILC_LOG_ERROR(("Rehash FAILED."));
499 /* Reinit scheduler if necessary */
500 if (newconfig->param.connections_max > server->config->param.connections_max)
501 if (!silc_schedule_reinit(server->schedule,
502 newconfig->param.connections_max))
505 /* Fix the server_name field */
506 if (strcmp(server->server_name, newconfig->server_info->server_name)) {
507 silc_free(server->server_name);
508 server->server_name = newconfig->server_info->server_name;
509 newconfig->server_info->server_name = NULL;
511 /* Update the idcache list with a fresh pointer */
512 silc_free(server->id_entry->server_name);
513 server->id_entry->server_name = strdup(server->server_name);
514 if (!silc_idcache_del_by_context(server->local_list->servers,
517 if (!silc_idcache_add(server->local_list->servers,
518 server->id_entry->server_name,
519 server->id_entry->id, server->id_entry, 0, NULL))
524 silc_server_config_setlogfiles(server);
526 /* Change new key pair if necessary */
527 if (newconfig->server_info->public_key &&
528 !silc_pkcs_public_key_compare(server->public_key,
529 newconfig->server_info->public_key)) {
530 silc_pkcs_public_key_free(server->public_key);
531 silc_pkcs_private_key_free(server->private_key);
532 server->public_key = newconfig->server_info->public_key;
533 server->private_key = newconfig->server_info->private_key;
534 newconfig->server_info->public_key = NULL;
535 newconfig->server_info->private_key = NULL;
537 /* Allocate PKCS context for local public and private keys */
538 silc_pkcs_free(server->pkcs);
539 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
541 silc_pkcs_public_key_set(server->pkcs, server->public_key);
542 silc_pkcs_private_key_set(server->pkcs, server->private_key);
545 /* Check for unconfigured server and router connections and close
546 connections that were unconfigured. */
548 if (server->config->routers) {
549 SilcServerConfigRouter *ptr;
550 SilcServerConfigRouter *newptr;
553 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
556 /* Check whether new config has this one too */
557 for (newptr = newconfig->routers; newptr; newptr = newptr->next) {
558 if (!strcmp(newptr->host, ptr->host) && newptr->port == ptr->port &&
559 newptr->initiator == ptr->initiator) {
566 /* Remove this connection */
567 SilcSocketConnection sock;
568 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_ROUTER,
569 ptr->host, ptr->port);
570 if (sock && !SILC_IS_LISTENER(sock))
571 silc_schedule_task_add(server->schedule, sock->sock,
572 silc_server_rehash_close_connection,
573 server, 0, 1, SILC_TASK_TIMEOUT,
574 SILC_TASK_PRI_NORMAL);
579 if (server->config->servers) {
580 SilcServerConfigServer *ptr;
581 SilcServerConfigServer *newptr;
584 for (ptr = server->config->servers; ptr; ptr = ptr->next) {
587 /* Check whether new config has this one too */
588 for (newptr = newconfig->servers; newptr; newptr = newptr->next) {
589 if (!strcmp(newptr->host, ptr->host)) {
596 /* Remove this connection */
597 SilcSocketConnection sock;
598 sock = silc_server_find_socket_by_host(server, SILC_SOCKET_TYPE_SERVER,
600 if (sock && !SILC_IS_LISTENER(sock))
601 silc_schedule_task_add(server->schedule, sock->sock,
602 silc_server_rehash_close_connection,
603 server, 0, 1, SILC_TASK_TIMEOUT,
604 SILC_TASK_PRI_NORMAL);
609 /* Go through all configured routers after rehash */
610 silc_schedule_task_add(server->schedule, 0,
611 silc_server_connect_to_router,
612 (void *)server, 0, 1,
614 SILC_TASK_PRI_NORMAL);
616 /* Check whether our router status has changed */
617 if (newconfig->servers) {
618 SilcServerConfigServer *ptr = newconfig->servers;
620 server->server_type = SILC_ROUTER;
622 if (ptr->backup_router) {
623 server->server_type = SILC_BACKUP_ROUTER;
624 server->backup_router = TRUE;
625 server->id_entry->server_type = SILC_BACKUP_ROUTER;
632 /* Our old config is gone now. We'll unreference our reference made in
633 silc_server_init and then destroy it since we are destroying it
634 underneath the application (layer which called silc_server_init). */
635 silc_server_config_unref(&server->config_ref);
636 silc_server_config_destroy(server->config);
638 /* Take new config context */
639 server->config = newconfig;
640 silc_server_config_ref(&server->config_ref, server->config, server->config);
642 SILC_LOG_DEBUG(("Server rehashed"));
647 /* The heart of the server. This runs the scheduler thus runs the server.
648 When this returns the server has been stopped and the program will
651 void silc_server_run(SilcServer server)
653 SILC_LOG_INFO(("SILC Server started"));
655 /* Start the scheduler, the heart of the SILC server. When this returns
656 the program will be terminated. */
657 silc_schedule(server->schedule);
660 /* Stops the SILC server. This function is used to shutdown the server.
661 This is usually called after the scheduler has returned. After stopping
662 the server one should call silc_server_free. */
664 void silc_server_stop(SilcServer server)
666 SILC_LOG_DEBUG(("Stopping server"));
668 if (server->schedule) {
671 server->server_shutdown = TRUE;
673 /* Close all connections */
674 for (i = 0; i < server->config->param.connections_max; i++) {
675 if (!server->sockets[i])
677 if (!SILC_IS_LISTENER(server->sockets[i])) {
678 SilcIDListData idata = server->sockets[i]->user_data;
681 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
683 silc_schedule_task_del_by_context(server->schedule,
685 silc_server_disconnect_remote(server, server->sockets[i],
687 "Server is shutting down");
689 silc_socket_free(server->sockets[i]);
690 server->sockets[i] = NULL;
694 /* We are not connected to network anymore */
695 server->standalone = TRUE;
697 silc_schedule_stop(server->schedule);
698 silc_schedule_uninit(server->schedule);
699 server->schedule = NULL;
701 silc_free(server->sockets);
702 server->sockets = NULL;
705 silc_server_protocols_unregister();
707 SILC_LOG_DEBUG(("Server stopped"));
710 /* Function that is called when the network connection to a router has
711 been established. This will continue with the key exchange protocol
712 with the remote router. */
714 void silc_server_start_key_exchange(SilcServer server,
715 SilcServerConnection sconn,
718 SilcSocketConnection newsocket;
719 SilcProtocol protocol;
720 SilcServerKEInternalContext *proto_ctx;
721 SilcServerConfigRouter *conn =
722 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
725 /* Cancel any possible retry timeouts */
726 silc_schedule_task_del_by_callback(server->schedule,
727 silc_server_connect_to_router_retry);
729 /* Set socket options */
730 silc_net_set_socket_nonblock(sock);
731 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
733 /* Create socket connection for the connection. Even though we
734 know that we are connecting to a router we will mark the socket
735 to be unknown connection until we have executed authentication
737 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
738 server->sockets[sock] = newsocket;
739 newsocket->hostname = strdup(sconn->remote_host);
740 newsocket->ip = strdup(sconn->remote_host);
741 newsocket->port = sconn->remote_port;
742 sconn->sock = newsocket;
744 /* Allocate internal protocol context. This is sent as context
746 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
747 proto_ctx->server = (void *)server;
748 proto_ctx->context = (void *)sconn;
749 proto_ctx->sock = newsocket;
750 proto_ctx->rng = server->rng;
751 proto_ctx->responder = FALSE;
753 /* Set Key Exchange flags from configuration, but fall back to global
755 SILC_GET_SKE_FLAGS(conn, proto_ctx);
756 if (server->config->param.key_exchange_pfs)
757 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
759 /* Perform key exchange protocol. silc_server_connect_to_router_second
760 will be called after the protocol is finished. */
761 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
762 &protocol, proto_ctx,
763 silc_server_connect_to_router_second);
764 newsocket->protocol = protocol;
766 /* Register a timeout task that will be executed if the protocol
767 is not executed within set limit. */
768 proto_ctx->timeout_task =
769 silc_schedule_task_add(server->schedule, sock,
770 silc_server_timeout_remote,
771 server, server->config->key_exchange_timeout, 0,
775 /* Register the connection for network input and output. This sets
776 that scheduler will listen for incoming packets for this connection
777 and sets that outgoing packets may be sent to this connection as
778 well. However, this doesn't set the scheduler for outgoing traffic,
779 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
780 later when outgoing data is available. */
781 context = (void *)server;
782 SILC_REGISTER_CONNECTION_FOR_IO(sock);
784 /* Run the protocol */
785 silc_protocol_execute(protocol, server->schedule, 0, 0);
788 /* Timeout callback that will be called to retry connecting to remote
789 router. This is used by both normal and router server. This will wait
790 before retrying the connecting. The timeout is generated by exponential
791 backoff algorithm. */
793 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
795 SilcServerConnection sconn = (SilcServerConnection)context;
796 SilcServer server = sconn->server;
797 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
798 SilcServerConfigConnParams *param =
799 (conn->param ? conn->param : &server->config->param);
801 SILC_LOG_INFO(("Retrying connecting to a router"));
803 /* Calculate next timeout */
804 if (sconn->retry_count >= 1) {
805 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
806 if (sconn->retry_timeout > param->reconnect_interval_max)
807 sconn->retry_timeout = param->reconnect_interval_max;
809 sconn->retry_timeout = param->reconnect_interval;
811 sconn->retry_count++;
812 sconn->retry_timeout = sconn->retry_timeout +
813 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
815 /* If we've reached max retry count, give up. */
816 if ((sconn->retry_count > param->reconnect_count) &&
817 !param->reconnect_keep_trying) {
818 SILC_LOG_ERROR(("Could not connect to router, giving up"));
819 silc_server_config_unref(&sconn->conn);
820 silc_free(sconn->remote_host);
821 silc_free(sconn->backup_replace_ip);
826 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
827 sconn->retry_timeout));
829 /* We will lookup a fresh pointer later */
830 silc_server_config_unref(&sconn->conn);
832 /* Wait one before retrying */
833 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
834 context, sconn->retry_timeout, 0,
835 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
838 /* Generic routine to use connect to a router. */
840 SILC_TASK_CALLBACK(silc_server_connect_router)
842 SilcServerConnection sconn = (SilcServerConnection)context;
843 SilcServer server = sconn->server;
844 SilcServerConfigRouter *rconn;
847 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
848 (sconn->backup ? "backup router" : "router"),
849 sconn->remote_host, sconn->remote_port));
851 server->router_connect = time(NULL);
852 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
855 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
856 (sconn->backup ? "backup router" : "router"),
857 sconn->remote_host, sconn->remote_port));
858 silc_free(sconn->remote_host);
859 silc_free(sconn->backup_replace_ip);
863 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
865 /* Connect to remote host */
866 sock = silc_net_create_connection(
867 (!server->config->server_info->primary ? NULL :
868 server->config->server_info->primary->server_ip),
869 sconn->remote_port, sconn->remote_host);
871 SILC_LOG_ERROR(("Could not connect to router %s:%d",
872 sconn->remote_host, sconn->remote_port));
873 if (!sconn->no_reconnect)
874 silc_schedule_task_add(server->schedule, 0,
875 silc_server_connect_to_router_retry,
876 context, 0, 1, SILC_TASK_TIMEOUT,
877 SILC_TASK_PRI_NORMAL);
879 silc_server_config_unref(&sconn->conn);
883 /* Continue with key exchange protocol */
884 silc_server_start_key_exchange(server, sconn, sock);
887 /* This function connects to our primary router or if we are a router this
888 establishes all our primary routes. This is called at the start of the
889 server to do authentication and key exchange with our router - called
892 SILC_TASK_CALLBACK(silc_server_connect_to_router)
894 SilcServer server = (SilcServer)context;
895 SilcServerConnection sconn;
896 SilcServerConfigRouter *ptr;
898 SILC_LOG_DEBUG(("We are %s",
899 (server->server_type == SILC_SERVER ?
900 "normal server" : server->server_type == SILC_ROUTER ?
901 "router" : "backup router/normal server")));
903 if (!server->config->routers) {
904 /* There wasn't a configured router, we will continue but we don't
905 have a connection to outside world. We will be standalone server. */
906 SILC_LOG_DEBUG(("No router(s), we are standalone"));
907 server->standalone = TRUE;
911 /* Cancel any possible retry timeouts */
912 silc_schedule_task_del_by_callback(server->schedule,
913 silc_server_connect_router);
914 silc_schedule_task_del_by_callback(server->schedule,
915 silc_server_connect_to_router_retry);
917 /* Create the connections to all our routes */
918 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
920 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
921 ptr->backup_router ? "Backup router" : "Router",
922 ptr->initiator ? "Initiator" : "Responder",
923 ptr->host, ptr->port));
925 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
926 ptr->initiator == FALSE && !server->backup_router &&
927 !silc_server_config_get_backup_router(server))
928 server->wait_backup = TRUE;
930 if (ptr->initiator) {
931 /* Check whether we are connected to this host already */
932 if (silc_server_num_sockets_by_remote(server,
933 silc_net_is_ip(ptr->host) ?
935 silc_net_is_ip(ptr->host) ?
936 NULL : ptr->host, ptr->port,
937 SILC_SOCKET_TYPE_ROUTER)) {
938 SILC_LOG_DEBUG(("We are already connected to this router"));
942 /* Allocate connection object for hold connection specific stuff. */
943 sconn = silc_calloc(1, sizeof(*sconn));
944 sconn->server = server;
945 sconn->remote_host = strdup(ptr->host);
946 sconn->remote_port = ptr->port;
947 sconn->backup = ptr->backup_router;
949 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
950 sconn->backup_replace_port = ptr->backup_replace_port;
953 if (!server->router_conn && !sconn->backup)
954 server->router_conn = sconn;
956 silc_schedule_task_add(server->schedule, 0,
957 silc_server_connect_router,
958 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
959 SILC_TASK_PRI_NORMAL);
964 /* Second part of connecting to router(s). Key exchange protocol has been
965 executed and now we will execute authentication protocol. */
967 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
969 SilcProtocol protocol = (SilcProtocol)context;
970 SilcServerKEInternalContext *ctx =
971 (SilcServerKEInternalContext *)protocol->context;
972 SilcServer server = (SilcServer)ctx->server;
973 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
974 SilcSocketConnection sock = ctx->sock;
975 SilcServerConnAuthInternalContext *proto_ctx;
976 SilcServerConfigRouter *conn = NULL;
978 SILC_LOG_DEBUG(("Start"));
980 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
981 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
982 /* Error occured during protocol */
983 silc_protocol_free(protocol);
984 sock->protocol = NULL;
985 silc_ske_free_key_material(ctx->keymat);
987 silc_packet_context_free(ctx->packet);
989 silc_ske_free(ctx->ske);
990 silc_free(ctx->dest_id);
992 silc_schedule_task_del_by_callback(server->schedule,
993 silc_server_failure_callback);
994 silc_server_disconnect_remote(server, sock,
995 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
997 /* Try reconnecting if configuration wants it */
998 if (!sconn->no_reconnect) {
999 silc_schedule_task_add(server->schedule, 0,
1000 silc_server_connect_to_router_retry,
1001 sconn, 0, 1, SILC_TASK_TIMEOUT,
1002 SILC_TASK_PRI_NORMAL);
1006 /* Call completion to indicate error */
1007 if (sconn->callback)
1008 (*sconn->callback)(server, NULL, sconn->callback_context);
1010 silc_server_config_unref(&sconn->conn);
1011 silc_free(sconn->remote_host);
1012 silc_free(sconn->backup_replace_ip);
1017 /* We now have the key material as the result of the key exchange
1018 protocol. Take the key material into use. Free the raw key material
1019 as soon as we've set them into use. */
1020 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1021 ctx->sock, ctx->keymat,
1022 ctx->ske->prop->cipher,
1023 ctx->ske->prop->pkcs,
1024 ctx->ske->prop->hash,
1025 ctx->ske->prop->hmac,
1026 ctx->ske->prop->group,
1028 silc_protocol_free(protocol);
1029 sock->protocol = NULL;
1030 silc_ske_free_key_material(ctx->keymat);
1032 silc_packet_context_free(ctx->packet);
1034 silc_ske_free(ctx->ske);
1035 silc_free(ctx->dest_id);
1037 silc_schedule_task_del_by_callback(server->schedule,
1038 silc_server_failure_callback);
1039 silc_server_disconnect_remote(server, sock,
1040 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1042 /* Try reconnecting if configuration wants it */
1043 if (!sconn->no_reconnect) {
1044 silc_schedule_task_add(server->schedule, 0,
1045 silc_server_connect_to_router_retry,
1046 sconn, 0, 1, SILC_TASK_TIMEOUT,
1047 SILC_TASK_PRI_NORMAL);
1051 /* Call completion to indicate error */
1052 if (sconn->callback)
1053 (*sconn->callback)(server, NULL, sconn->callback_context);
1055 silc_server_config_unref(&sconn->conn);
1056 silc_free(sconn->remote_host);
1057 silc_free(sconn->backup_replace_ip);
1061 silc_ske_free_key_material(ctx->keymat);
1063 /* Allocate internal context for the authentication protocol. This
1064 is sent as context for the protocol. */
1065 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1066 proto_ctx->server = (void *)server;
1067 proto_ctx->context = (void *)sconn;
1068 proto_ctx->sock = sock;
1069 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1070 proto_ctx->dest_id_type = ctx->dest_id_type;
1071 proto_ctx->dest_id = ctx->dest_id;
1073 /* Resolve the authentication method used in this connection. Check if
1074 we find a match from user configured connections */
1075 if (!sconn->conn.ref_ptr)
1076 conn = silc_server_config_find_router_conn(server, sock->hostname,
1079 conn = sconn->conn.ref_ptr;
1082 /* Match found. Use the configured authentication method. Take only
1083 the passphrase, since for public key auth we automatically use
1084 our local key pair. */
1085 if (conn->passphrase) {
1086 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1087 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1089 proto_ctx->auth_data = strdup(conn->passphrase);
1090 proto_ctx->auth_data_len = strlen(conn->passphrase);
1091 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1093 } else if (conn->publickeys) {
1094 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1096 proto_ctx->auth_meth = SILC_AUTH_NONE;
1099 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1100 sock->hostname, sock->ip, sock->port));
1101 silc_protocol_free(protocol);
1102 sock->protocol = NULL;
1104 silc_packet_context_free(ctx->packet);
1106 silc_ske_free(ctx->ske);
1107 silc_free(ctx->dest_id);
1109 silc_server_config_unref(&sconn->conn);
1110 silc_free(sconn->remote_host);
1111 silc_free(sconn->backup_replace_ip);
1113 silc_schedule_task_del_by_callback(server->schedule,
1114 silc_server_failure_callback);
1115 silc_server_disconnect_remote(server, sock,
1116 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1120 /* Free old protocol as it is finished now */
1121 silc_protocol_free(protocol);
1123 silc_packet_context_free(ctx->packet);
1125 sock->protocol = NULL;
1127 /* Allocate the authentication protocol. This is allocated here
1128 but we won't start it yet. We will be receiving party of this
1129 protocol thus we will wait that connecting party will make
1130 their first move. */
1131 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1132 &sock->protocol, proto_ctx,
1133 silc_server_connect_to_router_final);
1135 /* Register timeout task. If the protocol is not executed inside
1136 this timelimit the connection will be terminated. */
1137 proto_ctx->timeout_task =
1138 silc_schedule_task_add(server->schedule, sock->sock,
1139 silc_server_timeout_remote,
1141 server->config->conn_auth_timeout, 0,
1145 /* Run the protocol */
1146 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1149 /* Finalizes the connection to router. Registers a server task to the
1150 queue so that we can accept new connections. */
1152 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1154 SilcProtocol protocol = (SilcProtocol)context;
1155 SilcServerConnAuthInternalContext *ctx =
1156 (SilcServerConnAuthInternalContext *)protocol->context;
1157 SilcServer server = (SilcServer)ctx->server;
1158 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1159 SilcSocketConnection sock = ctx->sock;
1160 SilcServerEntry id_entry = NULL;
1162 SilcServerHBContext hb_context;
1163 unsigned char *id_string;
1165 SilcIDListData idata;
1166 SilcServerConfigRouter *conn = NULL;
1167 SilcServerConfigConnParams *param = NULL;
1169 SILC_LOG_DEBUG(("Start"));
1171 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1172 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1173 /* Error occured during protocol */
1174 silc_free(ctx->dest_id);
1175 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1178 /* Try reconnecting if configuration wants it */
1179 if (!sconn->no_reconnect) {
1180 silc_schedule_task_add(server->schedule, 0,
1181 silc_server_connect_to_router_retry,
1182 sconn, 0, 1, SILC_TASK_TIMEOUT,
1183 SILC_TASK_PRI_NORMAL);
1190 /* Add a task to the queue. This task receives new connections to the
1191 server. This task remains on the queue until the end of the program. */
1192 if (!server->listenning && !sconn->backup) {
1193 silc_schedule_task_add(server->schedule, server->sock,
1194 silc_server_accept_new_connection,
1195 (void *)server, 0, 0,
1197 SILC_TASK_PRI_NORMAL);
1198 server->listenning = TRUE;
1201 /* Send NEW_SERVER packet to the router. We will become registered
1202 to the SILC network after sending this packet. */
1203 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1204 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1205 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1206 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1207 silc_buffer_format(packet,
1208 SILC_STR_UI_SHORT(id_len),
1209 SILC_STR_UI_XNSTRING(id_string, id_len),
1210 SILC_STR_UI_SHORT(strlen(server->server_name)),
1211 SILC_STR_UI_XNSTRING(server->server_name,
1212 strlen(server->server_name)),
1215 /* Send the packet */
1216 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1217 packet->data, packet->len, TRUE);
1218 silc_buffer_free(packet);
1219 silc_free(id_string);
1221 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1223 /* Check that we do not have this ID already */
1224 id_entry = silc_idlist_find_server_by_id(server->local_list,
1225 ctx->dest_id, TRUE, NULL);
1227 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1229 id_entry = silc_idlist_find_server_by_id(server->global_list,
1230 ctx->dest_id, TRUE, NULL);
1232 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1235 SILC_LOG_DEBUG(("New server id(%s)",
1236 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1238 /* Add the connected router to global server list. Router is sent
1239 as NULL since it's local to us. */
1240 id_entry = silc_idlist_add_server(server->global_list,
1241 strdup(sock->hostname),
1242 SILC_ROUTER, ctx->dest_id, NULL, sock);
1244 silc_free(ctx->dest_id);
1245 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1246 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1251 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1252 silc_free(sock->user_data);
1253 sock->user_data = (void *)id_entry;
1254 sock->type = SILC_SOCKET_TYPE_ROUTER;
1255 idata = (SilcIDListData)sock->user_data;
1256 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1257 SILC_IDLIST_STATUS_LOCAL);
1259 conn = sconn->conn.ref_ptr;
1260 param = &server->config->param;
1261 if (conn && conn->param)
1262 param = conn->param;
1264 /* Perform keepalive. The `hb_context' will be freed automatically
1265 when finally calling the silc_socket_free function. */
1266 hb_context = silc_calloc(1, sizeof(*hb_context));
1267 hb_context->server = server;
1268 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1269 silc_server_perform_heartbeat,
1272 /* Register re-key timeout */
1273 idata->rekey->timeout = param->key_exchange_rekey;
1274 idata->rekey->context = (void *)server;
1275 silc_schedule_task_add(server->schedule, sock->sock,
1276 silc_server_rekey_callback,
1277 (void *)sock, idata->rekey->timeout, 0,
1278 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1280 if (!sconn->backup) {
1281 /* Mark this router our primary router if we're still standalone */
1282 if (server->standalone) {
1283 server->id_entry->router = id_entry;
1284 server->router = id_entry;
1285 server->standalone = FALSE;
1287 /* If we are router then announce our possible servers. Backup
1288 router announces also global servers. */
1289 if (server->server_type == SILC_ROUTER)
1290 silc_server_announce_servers(server,
1291 server->backup_router ? TRUE : FALSE,
1292 0, SILC_PRIMARY_ROUTE(server));
1294 /* Announce our clients and channels to the router */
1295 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1296 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1298 /* If we are backup router then this primary router is whom we are
1300 if (server->server_type == SILC_BACKUP_ROUTER)
1301 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1304 /* Add this server to be our backup router */
1305 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1306 sconn->backup_replace_port, FALSE);
1309 sock->protocol = NULL;
1312 /* Call the completion callback to indicate that we've connected to
1314 if (sconn->callback)
1315 (*sconn->callback)(server, id_entry, sconn->callback_context);
1317 /* Free the temporary connection data context */
1319 silc_server_config_unref(&sconn->conn);
1320 silc_free(sconn->remote_host);
1321 silc_free(sconn->backup_replace_ip);
1324 if (sconn == server->router_conn)
1325 server->router_conn = NULL;
1328 /* Free the protocol object */
1329 if (sock->protocol == protocol)
1330 sock->protocol = NULL;
1331 silc_protocol_free(protocol);
1333 silc_packet_context_free(ctx->packet);
1335 silc_ske_free(ctx->ske);
1336 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1337 silc_free(ctx->auth_data);
1341 /* Host lookup callback that is called after the incoming connection's
1342 IP and FQDN lookup is performed. This will actually check the acceptance
1343 of the incoming connection and will register the key exchange protocol
1344 for this connection. */
1347 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1350 SilcServerKEInternalContext *proto_ctx =
1351 (SilcServerKEInternalContext *)context;
1352 SilcServer server = (SilcServer)proto_ctx->server;
1353 SilcServerConfigClient *cconfig = NULL;
1354 SilcServerConfigServer *sconfig = NULL;
1355 SilcServerConfigRouter *rconfig = NULL;
1356 SilcServerConfigDeny *deny;
1359 context = (void *)server;
1361 /* Check whether we could resolve both IP and FQDN. */
1362 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1363 server->config->require_reverse_lookup)) {
1364 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1365 sock->hostname ? sock->hostname :
1366 sock->ip ? sock->ip : ""));
1367 server->stat.conn_failures++;
1368 silc_server_disconnect_remote(server, sock,
1369 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1370 "Unknown host or IP");
1371 silc_free(proto_ctx);
1375 /* Register the connection for network input and output. This sets
1376 that scheduler will listen for incoming packets for this connection
1377 and sets that outgoing packets may be sent to this connection as well.
1378 However, this doesn't set the scheduler for outgoing traffic, it
1379 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1380 later when outgoing data is available. */
1381 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1383 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1386 /* Listenning port */
1387 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1388 silc_server_disconnect_remote(server, sock,
1389 SILC_STATUS_ERR_RESOURCE_LIMIT,
1390 "Connection refused");
1391 server->stat.conn_failures++;
1392 silc_free(proto_ctx);
1395 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1397 /* Check whether this connection is denied to connect to us. */
1398 deny = silc_server_config_find_denied(server, sock->ip);
1400 deny = silc_server_config_find_denied(server, sock->hostname);
1402 /* The connection is denied */
1403 SILC_LOG_INFO(("Connection %s (%s) is denied",
1404 sock->hostname, sock->ip));
1405 silc_server_disconnect_remote(server, sock,
1406 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1408 server->stat.conn_failures++;
1409 silc_free(proto_ctx);
1413 /* Check whether we have configured this sort of connection at all. We
1414 have to check all configurations since we don't know what type of
1415 connection this is. */
1416 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1417 cconfig = silc_server_config_find_client(server, sock->hostname);
1418 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1419 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1420 if (server->server_type == SILC_ROUTER) {
1421 if (!(rconfig = silc_server_config_find_router_conn(server,
1422 sock->ip, sock->port)))
1423 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1426 if (!cconfig && !sconfig && !rconfig) {
1427 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1429 silc_server_disconnect_remote(server, sock,
1430 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1431 server->stat.conn_failures++;
1432 silc_free(proto_ctx);
1436 /* The connection is allowed */
1438 /* Set internal context for key exchange protocol. This is
1439 sent as context for the protocol. */
1440 proto_ctx->sock = sock;
1441 proto_ctx->rng = server->rng;
1442 proto_ctx->responder = TRUE;
1443 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1444 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1445 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1447 /* Take flags for key exchange. Since we do not know what type of connection
1448 this is, we go through all found configurations and use the global ones
1449 as well. This will result always into strictest key exchange flags. */
1450 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1451 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1452 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1453 if (server->config->param.key_exchange_pfs)
1454 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1456 /* Prepare the connection for key exchange protocol. We allocate the
1457 protocol but will not start it yet. The connector will be the
1458 initiator of the protocol thus we will wait for initiation from
1459 there before we start the protocol. */
1460 server->stat.auth_attempts++;
1461 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1462 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1463 &sock->protocol, proto_ctx,
1464 silc_server_accept_new_connection_second);
1466 /* Register a timeout task that will be executed if the connector
1467 will not start the key exchange protocol within specified timeout
1468 and the connection will be closed. */
1469 proto_ctx->timeout_task =
1470 silc_schedule_task_add(server->schedule, sock->sock,
1471 silc_server_timeout_remote,
1473 server->config->key_exchange_timeout, 0,
1478 /* Accepts new connections to the server. Accepting new connections are
1479 done in three parts to make it async. */
1481 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1483 SilcServer server = (SilcServer)context;
1484 SilcSocketConnection newsocket;
1485 SilcServerKEInternalContext *proto_ctx;
1488 SILC_LOG_DEBUG(("Accepting new connection"));
1490 server->stat.conn_attempts++;
1492 sock = silc_net_accept_connection(fd);
1494 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1495 server->stat.conn_failures++;
1499 /* Check for maximum allowed connections */
1500 if (sock > server->config->param.connections_max) {
1501 SILC_LOG_ERROR(("Refusing connection, server is full"));
1502 server->stat.conn_failures++;
1503 silc_net_close_connection(sock);
1507 /* Set socket options */
1508 silc_net_set_socket_nonblock(sock);
1509 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1511 /* We don't create a ID yet, since we don't know what type of connection
1512 this is yet. But, we do add the connection to the socket table. */
1513 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1514 server->sockets[sock] = newsocket;
1516 /* Perform asynchronous host lookup. This will lookup the IP and the
1517 FQDN of the remote connection. After the lookup is done the connection
1518 is accepted further. */
1519 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1520 proto_ctx->server = server;
1521 proto_ctx->context = (void *)fd;
1522 silc_socket_host_lookup(newsocket, TRUE,
1523 silc_server_accept_new_connection_lookup,
1524 (void *)proto_ctx, server->schedule);
1527 /* Second part of accepting new connection. Key exchange protocol has been
1528 performed and now it is time to do little connection authentication
1529 protocol to figure out whether this connection is client or server
1530 and whether it has right to access this server (especially server
1531 connections needs to be authenticated). */
1533 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1535 SilcProtocol protocol = (SilcProtocol)context;
1536 SilcServerKEInternalContext *ctx =
1537 (SilcServerKEInternalContext *)protocol->context;
1538 SilcServer server = (SilcServer)ctx->server;
1539 SilcSocketConnection sock = ctx->sock;
1540 SilcServerConnAuthInternalContext *proto_ctx;
1542 SILC_LOG_DEBUG(("Start"));
1544 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1545 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1546 /* Error occured during protocol */
1547 SILC_LOG_DEBUG(("Error key exchange protocol"));
1548 silc_protocol_free(protocol);
1549 sock->protocol = NULL;
1550 silc_ske_free_key_material(ctx->keymat);
1552 silc_packet_context_free(ctx->packet);
1554 silc_ske_free(ctx->ske);
1555 silc_free(ctx->dest_id);
1556 silc_server_config_unref(&ctx->cconfig);
1557 silc_server_config_unref(&ctx->sconfig);
1558 silc_server_config_unref(&ctx->rconfig);
1560 silc_schedule_task_del_by_callback(server->schedule,
1561 silc_server_failure_callback);
1562 silc_server_disconnect_remote(server, sock,
1563 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1565 server->stat.auth_failures++;
1569 /* We now have the key material as the result of the key exchange
1570 protocol. Take the key material into use. Free the raw key material
1571 as soon as we've set them into use. */
1572 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1573 ctx->sock, ctx->keymat,
1574 ctx->ske->prop->cipher,
1575 ctx->ske->prop->pkcs,
1576 ctx->ske->prop->hash,
1577 ctx->ske->prop->hmac,
1578 ctx->ske->prop->group,
1580 SILC_LOG_ERROR(("Error setting key material in use"));
1581 silc_protocol_free(protocol);
1582 sock->protocol = NULL;
1583 silc_ske_free_key_material(ctx->keymat);
1585 silc_packet_context_free(ctx->packet);
1587 silc_ske_free(ctx->ske);
1588 silc_free(ctx->dest_id);
1589 silc_server_config_unref(&ctx->cconfig);
1590 silc_server_config_unref(&ctx->sconfig);
1591 silc_server_config_unref(&ctx->rconfig);
1593 silc_schedule_task_del_by_callback(server->schedule,
1594 silc_server_failure_callback);
1595 silc_server_disconnect_remote(server, sock,
1596 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1597 server->stat.auth_failures++;
1600 silc_ske_free_key_material(ctx->keymat);
1602 /* Allocate internal context for the authentication protocol. This
1603 is sent as context for the protocol. */
1604 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1605 proto_ctx->server = (void *)server;
1606 proto_ctx->sock = sock;
1607 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1608 proto_ctx->responder = TRUE;
1609 proto_ctx->dest_id_type = ctx->dest_id_type;
1610 proto_ctx->dest_id = ctx->dest_id;
1611 proto_ctx->cconfig = ctx->cconfig;
1612 proto_ctx->sconfig = ctx->sconfig;
1613 proto_ctx->rconfig = ctx->rconfig;
1615 /* Free old protocol as it is finished now */
1616 silc_protocol_free(protocol);
1618 silc_packet_context_free(ctx->packet);
1620 sock->protocol = NULL;
1622 /* Allocate the authentication protocol. This is allocated here
1623 but we won't start it yet. We will be receiving party of this
1624 protocol thus we will wait that connecting party will make
1625 their first move. */
1626 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1627 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1628 &sock->protocol, proto_ctx,
1629 silc_server_accept_new_connection_final);
1631 /* Register timeout task. If the protocol is not executed inside
1632 this timelimit the connection will be terminated. */
1633 proto_ctx->timeout_task =
1634 silc_schedule_task_add(server->schedule, sock->sock,
1635 silc_server_timeout_remote,
1637 server->config->conn_auth_timeout, 0,
1642 /* After this is called, server don't wait for backup router anymore.
1643 This gets called automatically even after we have backup router
1644 connection established. */
1646 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1648 SilcServer server = context;
1649 server->wait_backup = FALSE;
1652 /* Final part of accepting new connection. The connection has now
1653 been authenticated and keys has been exchanged. We also know whether
1654 this is client or server connection. */
1656 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1658 SilcProtocol protocol = (SilcProtocol)context;
1659 SilcServerConnAuthInternalContext *ctx =
1660 (SilcServerConnAuthInternalContext *)protocol->context;
1661 SilcServer server = (SilcServer)ctx->server;
1662 SilcSocketConnection sock = ctx->sock;
1663 SilcServerHBContext hb_context;
1664 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1666 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1668 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1669 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1670 /* Error occured during protocol */
1671 SILC_LOG_DEBUG(("Error during authentication protocol"));
1672 silc_protocol_free(protocol);
1673 sock->protocol = NULL;
1675 silc_packet_context_free(ctx->packet);
1677 silc_ske_free(ctx->ske);
1678 silc_free(ctx->dest_id);
1679 silc_server_config_unref(&ctx->cconfig);
1680 silc_server_config_unref(&ctx->sconfig);
1681 silc_server_config_unref(&ctx->rconfig);
1683 silc_schedule_task_del_by_callback(server->schedule,
1684 silc_server_failure_callback);
1685 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1687 server->stat.auth_failures++;
1691 entry->data.last_receive = time(NULL);
1693 switch (ctx->conn_type) {
1694 case SILC_SOCKET_TYPE_CLIENT:
1696 SilcClientEntry client;
1697 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1699 /* Verify whether this connection is after all allowed to connect */
1700 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1701 &server->config->param,
1702 conn->param, ctx->ske)) {
1703 server->stat.auth_failures++;
1707 /* If we are primary router and we have backup router configured
1708 but it has not connected to use yet, do not accept any other
1710 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1711 !server->backup_router) {
1712 SilcServerConfigRouter *router;
1713 router = silc_server_config_get_backup_router(server);
1714 if (router && strcmp(server->config->server_info->primary->server_ip,
1716 silc_server_find_socket_by_host(server,
1717 SILC_SOCKET_TYPE_SERVER,
1718 router->backup_replace_ip, 0)) {
1719 SILC_LOG_INFO(("Will not accept connections because we do "
1720 "not have backup router connection established"));
1721 silc_server_disconnect_remote(server, sock,
1722 SILC_STATUS_ERR_PERM_DENIED,
1723 "We do not have connection to backup "
1724 "router established, try later");
1725 silc_free(sock->user_data);
1726 server->stat.auth_failures++;
1728 /* From here on, wait 10 seconds for the backup router to appear. */
1729 silc_schedule_task_add(server->schedule, 0,
1730 silc_server_backup_router_wait,
1731 (void *)server, 10, 0,
1732 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1737 SILC_LOG_DEBUG(("Remote host is client"));
1738 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1741 /* Add the client to the client ID cache. The nickname and Client ID
1742 and other information is created after we have received NEW_CLIENT
1743 packet from client. */
1744 client = silc_idlist_add_client(server->local_list,
1745 NULL, NULL, NULL, NULL, NULL, sock, 0);
1747 SILC_LOG_ERROR(("Could not add new client to cache"));
1748 silc_free(sock->user_data);
1749 silc_server_disconnect_remote(server, sock,
1750 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1751 server->stat.auth_failures++;
1754 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1757 server->stat.my_clients++;
1758 server->stat.clients++;
1759 server->stat.cell_clients++;
1761 /* Get connection parameters */
1763 if (conn->param->keepalive_secs)
1764 hearbeat_timeout = conn->param->keepalive_secs;
1767 id_entry = (void *)client;
1770 case SILC_SOCKET_TYPE_SERVER:
1771 case SILC_SOCKET_TYPE_ROUTER:
1773 SilcServerEntry new_server;
1774 bool initiator = FALSE;
1775 bool backup_local = FALSE;
1776 bool backup_router = FALSE;
1777 char *backup_replace_ip = NULL;
1778 SilcUInt16 backup_replace_port = 0;
1779 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1780 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1782 /* If we are backup router and this is incoming server connection
1783 and we do not have connection to primary router, do not allow
1785 if (server->server_type == SILC_BACKUP_ROUTER &&
1786 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1787 !SILC_PRIMARY_ROUTE(server)) {
1788 SILC_LOG_INFO(("Will not accept server connection because we do "
1789 "not have primary router connection established"));
1790 silc_server_disconnect_remote(server, sock,
1791 SILC_STATUS_ERR_PERM_DENIED,
1792 "We do not have connection to primary "
1793 "router established, try later");
1794 silc_free(sock->user_data);
1795 server->stat.auth_failures++;
1799 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1800 /* Verify whether this connection is after all allowed to connect */
1801 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1802 &server->config->param,
1803 rconn ? rconn->param : NULL,
1805 silc_free(sock->user_data);
1806 server->stat.auth_failures++;
1812 if (rconn->param->keepalive_secs)
1813 hearbeat_timeout = rconn->param->keepalive_secs;
1816 initiator = rconn->initiator;
1817 backup_local = rconn->backup_local;
1818 backup_router = rconn->backup_router;
1819 backup_replace_ip = rconn->backup_replace_ip;
1820 backup_replace_port = rconn->backup_replace_port;
1824 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1825 /* Verify whether this connection is after all allowed to connect */
1826 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1827 &server->config->param,
1828 sconn ? sconn->param : NULL,
1830 silc_free(sock->user_data);
1831 server->stat.auth_failures++;
1836 if (sconn->param->keepalive_secs)
1837 hearbeat_timeout = sconn->param->keepalive_secs;
1840 backup_router = sconn->backup_router;
1844 /* If we are primary router and we have backup router configured
1845 but it has not connected to use yet, do not accept any other
1847 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1848 !server->backup_router && !backup_router) {
1849 SilcServerConfigRouter *router;
1850 router = silc_server_config_get_backup_router(server);
1851 if (router && strcmp(server->config->server_info->primary->server_ip,
1853 silc_server_find_socket_by_host(server,
1854 SILC_SOCKET_TYPE_SERVER,
1855 router->backup_replace_ip, 0)) {
1856 SILC_LOG_INFO(("Will not accept connections because we do "
1857 "not have backup router connection established"));
1858 silc_server_disconnect_remote(server, sock,
1859 SILC_STATUS_ERR_PERM_DENIED,
1860 "We do not have connection to backup "
1861 "router established, try later");
1862 silc_free(sock->user_data);
1863 server->stat.auth_failures++;
1865 /* From here on, wait 10 seconds for the backup router to appear. */
1866 silc_schedule_task_add(server->schedule, 0,
1867 silc_server_backup_router_wait,
1868 (void *)server, 10, 0,
1869 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1874 SILC_LOG_DEBUG(("Remote host is %s",
1875 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1876 "server" : (backup_router ?
1877 "backup router" : "router")));
1878 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1879 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1880 "server" : (backup_router ?
1881 "backup router" : "router")));
1883 /* Add the server into server cache. The server name and Server ID
1884 is updated after we have received NEW_SERVER packet from the
1885 server. We mark ourselves as router for this server if we really
1888 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1889 server->local_list : (backup_router ?
1890 server->local_list :
1891 server->global_list)),
1893 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1894 SILC_SERVER : SILC_ROUTER),
1896 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1897 server->id_entry : (backup_router ?
1898 server->id_entry : NULL)),
1901 SILC_LOG_ERROR(("Could not add new server to cache"));
1902 silc_free(sock->user_data);
1903 silc_server_disconnect_remote(server, sock,
1904 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1905 server->stat.auth_failures++;
1908 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1910 id_entry = (void *)new_server;
1912 /* If the incoming connection is router and marked as backup router
1913 then add it to be one of our backups */
1914 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1915 /* Change it back to SERVER type since that's what it really is. */
1917 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1918 new_server->server_type = SILC_BACKUP_ROUTER;
1920 /* Remove the backup waiting with timeout */
1921 silc_schedule_task_add(server->schedule, 0,
1922 silc_server_backup_router_wait,
1923 (void *)server, 5, 0,
1924 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1928 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1929 server->stat.my_servers++;
1931 server->stat.my_routers++;
1932 server->stat.routers++;
1934 server->stat.servers++;
1936 /* Check whether this connection is to be our primary router connection
1937 if we do not already have the primary route. */
1938 if (!backup_router &&
1939 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1940 if (silc_server_config_is_primary_route(server) && !initiator)
1943 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1944 server->standalone = FALSE;
1945 if (!server->id_entry->router) {
1946 server->id_entry->router = id_entry;
1947 server->router = id_entry;
1958 sock->type = ctx->conn_type;
1960 /* Add the common data structure to the ID entry. */
1961 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1963 /* Add to sockets internal pointer for fast referencing */
1964 silc_free(sock->user_data);
1965 sock->user_data = id_entry;
1967 /* Connection has been fully established now. Everything is ok. */
1968 SILC_LOG_DEBUG(("New connection authenticated"));
1970 /* Perform keepalive. The `hb_context' will be freed automatically
1971 when finally calling the silc_socket_free function. */
1972 hb_context = silc_calloc(1, sizeof(*hb_context));
1973 hb_context->server = server;
1974 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1975 silc_server_perform_heartbeat,
1979 silc_schedule_task_del_by_callback(server->schedule,
1980 silc_server_failure_callback);
1981 silc_protocol_free(protocol);
1983 silc_packet_context_free(ctx->packet);
1985 silc_ske_free(ctx->ske);
1986 silc_free(ctx->dest_id);
1987 silc_server_config_unref(&ctx->cconfig);
1988 silc_server_config_unref(&ctx->sconfig);
1989 silc_server_config_unref(&ctx->rconfig);
1991 sock->protocol = NULL;
1994 /* This function is used to read packets from network and send packets to
1995 network. This is usually a generic task. */
1997 SILC_TASK_CALLBACK(silc_server_packet_process)
1999 SilcServer server = (SilcServer)context;
2000 SilcSocketConnection sock = server->sockets[fd];
2001 SilcIDListData idata;
2002 SilcCipher cipher = NULL;
2003 SilcHmac hmac = NULL;
2004 SilcUInt32 sequence = 0;
2008 SILC_LOG_DEBUG(("Unknown socket connection"));
2012 /* Packet sending */
2014 if (type == SILC_TASK_WRITE) {
2015 /* Do not send data to disconnected connection */
2016 if (SILC_IS_DISCONNECTED(sock)) {
2017 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2021 server->stat.packets_sent++;
2023 /* Send the packet */
2024 ret = silc_packet_send(sock, TRUE);
2026 /* If returned -2 could not write to connection now, will do
2032 SILC_LOG_ERROR(("Error sending packet to connection "
2033 "%s:%d [%s]", sock->hostname, sock->port,
2034 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2035 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2036 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2041 /* The packet has been sent and now it is time to set the connection
2042 back to only for input. When there is again some outgoing data
2043 available for this connection it will be set for output as well.
2044 This call clears the output setting and sets it only for input. */
2045 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2046 SILC_UNSET_OUTBUF_PENDING(sock);
2048 silc_buffer_clear(sock->outbuf);
2052 /* Packet receiving */
2054 /* Read some data from connection */
2055 ret = silc_packet_receive(sock);
2059 SILC_LOG_ERROR(("Error receiving packet from connection "
2060 "%s:%d [%s] %s", sock->hostname, sock->port,
2061 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2062 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2063 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2064 "Router"), strerror(errno)));
2070 SILC_LOG_DEBUG(("Read EOF"));
2072 /* If connection is disconnecting already we will finally
2073 close the connection */
2074 if (SILC_IS_DISCONNECTING(sock)) {
2075 if (sock->user_data)
2076 silc_server_free_sock_user_data(server, sock, NULL);
2077 silc_server_close_connection(server, sock);
2081 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2082 SILC_SET_DISCONNECTING(sock);
2084 if (sock->user_data) {
2086 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2087 silc_server_free_sock_user_data(server, sock, tmp);
2089 silc_server_free_sock_user_data(server, sock, NULL);
2090 } else if (server->router_conn && server->router_conn->sock == sock &&
2091 !server->router && server->standalone)
2092 silc_schedule_task_add(server->schedule, 0,
2093 silc_server_connect_to_router,
2096 SILC_TASK_PRI_NORMAL);
2098 silc_server_close_connection(server, sock);
2102 /* If connection is disconnecting or disconnected we will ignore
2104 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2105 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2109 /* Get keys and stuff from ID entry */
2110 idata = (SilcIDListData)sock->user_data;
2112 cipher = idata->receive_key;
2113 hmac = idata->hmac_receive;
2114 sequence = idata->psn_receive;
2117 /* Process the packet. This will call the parser that will then
2118 decrypt and parse the packet. */
2119 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2120 TRUE : FALSE, cipher, hmac, sequence,
2121 silc_server_packet_parse, server);
2123 /* If this socket connection is not authenticated yet and the packet
2124 processing failed we will drop the connection since it can be
2125 a malicious flooder. */
2126 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2127 (!sock->protocol || sock->protocol->protocol->type ==
2128 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2129 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2130 SILC_SET_DISCONNECTING(sock);
2132 if (sock->user_data)
2133 silc_server_free_sock_user_data(server, sock, NULL);
2134 silc_server_close_connection(server, sock);
2138 /* Parses whole packet, received earlier. */
2140 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2142 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2143 SilcServer server = (SilcServer)parse_ctx->context;
2144 SilcSocketConnection sock = parse_ctx->sock;
2145 SilcPacketContext *packet = parse_ctx->packet;
2146 SilcIDListData idata = (SilcIDListData)sock->user_data;
2149 server->stat.packets_received++;
2151 /* Parse the packet */
2152 if (parse_ctx->normal)
2153 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2155 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2157 /* If entry is disabled ignore what we got. */
2158 if (ret != SILC_PACKET_RESUME_ROUTER &&
2159 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2160 SILC_LOG_DEBUG(("Connection is disabled"));
2163 if (ret != SILC_PACKET_HEARTBEAT &&
2164 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2165 SILC_LOG_DEBUG(("Connection is disabled"));
2169 if (ret == SILC_PACKET_NONE) {
2170 SILC_LOG_DEBUG(("Error parsing packet"));
2174 /* Check that the the current client ID is same as in the client's packet. */
2175 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2176 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2177 if (client && client->id && packet->src_id) {
2178 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2179 packet->src_id_type);
2180 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2182 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2189 if (server->server_type == SILC_ROUTER) {
2190 /* Route the packet if it is not destined to us. Other ID types but
2191 server are handled separately after processing them. */
2192 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2193 packet->dst_id_type == SILC_ID_SERVER &&
2194 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2195 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2197 /* Route the packet to fastest route for the destination ID */
2198 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2199 packet->dst_id_type);
2202 silc_server_packet_route(server,
2203 silc_server_route_get(server, id,
2204 packet->dst_id_type),
2211 /* Parse the incoming packet type */
2212 silc_server_packet_parse_type(server, sock, packet);
2214 /* Broadcast packet if it is marked as broadcast packet and it is
2215 originated from router and we are router. */
2216 if (server->server_type == SILC_ROUTER &&
2217 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2218 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2219 /* Broadcast to our primary route */
2220 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2222 /* If we have backup routers then we need to feed all broadcast
2223 data to those servers. */
2224 silc_server_backup_broadcast(server, sock, packet);
2228 silc_packet_context_free(packet);
2229 silc_free(parse_ctx);
2232 /* Parser callback called by silc_packet_receive_process. This merely
2233 registers timeout that will handle the actual parsing when appropriate. */
2235 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2238 SilcServer server = (SilcServer)context;
2239 SilcSocketConnection sock = parser_context->sock;
2240 SilcIDListData idata = (SilcIDListData)sock->user_data;
2243 idata->psn_receive = parser_context->packet->sequence + 1;
2245 /* If protocol for this connection is key exchange or rekey then we'll
2246 process all packets synchronously, since there might be packets in
2247 queue that we are not able to decrypt without first processing the
2248 packets before them. */
2249 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2250 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2251 (sock->protocol && sock->protocol->protocol &&
2252 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2253 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2254 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2257 /* Reprocess data since we'll return FALSE here. This is because
2258 the idata->receive_key might have become valid in the last packet
2259 and we want to call this processor with valid cipher. */
2261 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2262 TRUE : FALSE, idata->receive_key,
2263 idata->hmac_receive, idata->psn_receive,
2264 silc_server_packet_parse, server);
2266 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2267 TRUE : FALSE, NULL, NULL, 0,
2268 silc_server_packet_parse, server);
2272 switch (sock->type) {
2273 case SILC_SOCKET_TYPE_UNKNOWN:
2274 case SILC_SOCKET_TYPE_CLIENT:
2275 /* Parse the packet with timeout */
2276 silc_schedule_task_add(server->schedule, sock->sock,
2277 silc_server_packet_parse_real,
2278 (void *)parser_context, 0, 100000,
2280 SILC_TASK_PRI_NORMAL);
2282 case SILC_SOCKET_TYPE_SERVER:
2283 case SILC_SOCKET_TYPE_ROUTER:
2284 /* Packets from servers are parsed immediately */
2285 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2295 /* Parses the packet type and calls what ever routines the packet type
2296 requires. This is done for all incoming packets. */
2298 void silc_server_packet_parse_type(SilcServer server,
2299 SilcSocketConnection sock,
2300 SilcPacketContext *packet)
2302 SilcPacketType type = packet->type;
2303 SilcIDListData idata = (SilcIDListData)sock->user_data;
2305 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2306 silc_get_packet_name(type), packet->flags));
2308 /* Parse the packet type */
2310 case SILC_PACKET_DISCONNECT:
2313 char *message = NULL;
2315 if (packet->flags & SILC_PACKET_FLAG_LIST)
2317 if (packet->buffer->len < 1)
2320 status = (SilcStatus)packet->buffer->data[0];
2321 if (packet->buffer->len > 1 &&
2322 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2323 message = silc_memdup(packet->buffer->data + 1,
2324 packet->buffer->len - 1);
2326 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2327 sock->ip, sock->hostname,
2328 silc_get_status_message(status), status,
2329 message ? message : ""));
2332 /* Handle the disconnection from our end too */
2333 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2334 silc_server_free_sock_user_data(server, sock, NULL);
2335 silc_server_close_connection(server, sock);
2339 case SILC_PACKET_SUCCESS:
2341 * Success received for something. For now we can have only
2342 * one protocol for connection executing at once hence this
2343 * success message is for whatever protocol is executing currently.
2345 if (packet->flags & SILC_PACKET_FLAG_LIST)
2348 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2351 case SILC_PACKET_FAILURE:
2353 * Failure received for something. For now we can have only
2354 * one protocol for connection executing at once hence this
2355 * failure message is for whatever protocol is executing currently.
2357 if (packet->flags & SILC_PACKET_FLAG_LIST)
2359 if (sock->protocol) {
2360 SilcServerFailureContext f;
2361 f = silc_calloc(1, sizeof(*f));
2365 /* We will wait 5 seconds to process this failure packet */
2366 silc_schedule_task_add(server->schedule, sock->sock,
2367 silc_server_failure_callback, (void *)f, 5, 0,
2368 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2372 case SILC_PACKET_REJECT:
2373 if (packet->flags & SILC_PACKET_FLAG_LIST)
2378 case SILC_PACKET_NOTIFY:
2380 * Received notify packet. Server can receive notify packets from
2381 * router. Server then relays the notify messages to clients if needed.
2383 if (packet->flags & SILC_PACKET_FLAG_LIST)
2384 silc_server_notify_list(server, sock, packet);
2386 silc_server_notify(server, sock, packet);
2392 case SILC_PACKET_CHANNEL_MESSAGE:
2394 * Received channel message. Channel messages are special packets
2395 * (although probably most common ones) thus they are handled
2398 if (packet->flags & SILC_PACKET_FLAG_LIST)
2400 idata->last_receive = time(NULL);
2401 silc_server_channel_message(server, sock, packet);
2404 case SILC_PACKET_CHANNEL_KEY:
2406 * Received key for channel. As channels are created by the router
2407 * the keys are as well. We will distribute the key to all of our
2408 * locally connected clients on the particular channel. Router
2409 * never receives this channel and thus is ignored.
2411 if (packet->flags & SILC_PACKET_FLAG_LIST)
2413 silc_server_channel_key(server, sock, packet);
2419 case SILC_PACKET_COMMAND:
2421 * Recived command. Processes the command request and allocates the
2422 * command context and calls the command.
2424 if (packet->flags & SILC_PACKET_FLAG_LIST)
2426 silc_server_command_process(server, sock, packet);
2429 case SILC_PACKET_COMMAND_REPLY:
2431 * Received command reply packet. Received command reply to command. It
2432 * may be reply to command sent by us or reply to command sent by client
2433 * that we've routed further.
2435 if (packet->flags & SILC_PACKET_FLAG_LIST)
2437 silc_server_command_reply(server, sock, packet);
2441 * Private Message packets
2443 case SILC_PACKET_PRIVATE_MESSAGE:
2445 * Received private message packet. The packet is coming from either
2448 if (packet->flags & SILC_PACKET_FLAG_LIST)
2450 idata->last_receive = time(NULL);
2451 silc_server_private_message(server, sock, packet);
2454 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2456 * Private message key packet.
2458 if (packet->flags & SILC_PACKET_FLAG_LIST)
2460 silc_server_private_message_key(server, sock, packet);
2464 * Key Exchange protocol packets
2466 case SILC_PACKET_KEY_EXCHANGE:
2467 if (packet->flags & SILC_PACKET_FLAG_LIST)
2470 if (sock->protocol && sock->protocol->protocol &&
2471 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2472 SilcServerKEInternalContext *proto_ctx =
2473 (SilcServerKEInternalContext *)sock->protocol->context;
2475 proto_ctx->packet = silc_packet_context_dup(packet);
2477 /* Let the protocol handle the packet */
2478 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2480 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2481 "protocol active, packet dropped."));
2485 case SILC_PACKET_KEY_EXCHANGE_1:
2486 if (packet->flags & SILC_PACKET_FLAG_LIST)
2489 if (sock->protocol && sock->protocol->protocol &&
2490 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2491 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2493 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2494 SilcServerRekeyInternalContext *proto_ctx =
2495 (SilcServerRekeyInternalContext *)sock->protocol->context;
2497 if (proto_ctx->packet)
2498 silc_packet_context_free(proto_ctx->packet);
2500 proto_ctx->packet = silc_packet_context_dup(packet);
2502 /* Let the protocol handle the packet */
2503 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2505 SilcServerKEInternalContext *proto_ctx =
2506 (SilcServerKEInternalContext *)sock->protocol->context;
2508 if (proto_ctx->packet)
2509 silc_packet_context_free(proto_ctx->packet);
2511 proto_ctx->packet = silc_packet_context_dup(packet);
2512 proto_ctx->dest_id_type = packet->src_id_type;
2513 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2514 packet->src_id_type);
2515 if (!proto_ctx->dest_id)
2518 /* Let the protocol handle the packet */
2519 silc_protocol_execute(sock->protocol, server->schedule,
2523 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2524 "protocol active, packet dropped."));
2528 case SILC_PACKET_KEY_EXCHANGE_2:
2529 if (packet->flags & SILC_PACKET_FLAG_LIST)
2532 if (sock->protocol && sock->protocol->protocol &&
2533 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2534 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2536 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2537 SilcServerRekeyInternalContext *proto_ctx =
2538 (SilcServerRekeyInternalContext *)sock->protocol->context;
2540 if (proto_ctx->packet)
2541 silc_packet_context_free(proto_ctx->packet);
2543 proto_ctx->packet = silc_packet_context_dup(packet);
2545 /* Let the protocol handle the packet */
2546 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2548 SilcServerKEInternalContext *proto_ctx =
2549 (SilcServerKEInternalContext *)sock->protocol->context;
2551 if (proto_ctx->packet)
2552 silc_packet_context_free(proto_ctx->packet);
2554 proto_ctx->packet = silc_packet_context_dup(packet);
2555 proto_ctx->dest_id_type = packet->src_id_type;
2556 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2557 packet->src_id_type);
2558 if (!proto_ctx->dest_id)
2561 /* Let the protocol handle the packet */
2562 silc_protocol_execute(sock->protocol, server->schedule,
2566 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2567 "protocol active, packet dropped."));
2571 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2573 * Connection authentication request packet. When we receive this packet
2574 * we will send to the other end information about our mandatory
2575 * authentication method for the connection. This packet maybe received
2578 if (packet->flags & SILC_PACKET_FLAG_LIST)
2580 silc_server_connection_auth_request(server, sock, packet);
2584 * Connection Authentication protocol packets
2586 case SILC_PACKET_CONNECTION_AUTH:
2587 /* Start of the authentication protocol. We receive here the
2588 authentication data and will verify it. */
2589 if (packet->flags & SILC_PACKET_FLAG_LIST)
2592 if (sock->protocol && sock->protocol->protocol->type
2593 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2595 SilcServerConnAuthInternalContext *proto_ctx =
2596 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2598 proto_ctx->packet = silc_packet_context_dup(packet);
2600 /* Let the protocol handle the packet */
2601 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2603 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2604 "protocol active, packet dropped."));
2608 case SILC_PACKET_NEW_ID:
2610 * Received New ID packet. This includes some new ID that has been
2611 * created. It may be for client, server or channel. This is the way
2612 * to distribute information about new registered entities in the
2615 if (packet->flags & SILC_PACKET_FLAG_LIST)
2616 silc_server_new_id_list(server, sock, packet);
2618 silc_server_new_id(server, sock, packet);
2621 case SILC_PACKET_NEW_CLIENT:
2623 * Received new client packet. This includes client information that
2624 * we will use to create initial client ID. After creating new
2625 * ID we will send it to the client.
2627 if (packet->flags & SILC_PACKET_FLAG_LIST)
2629 silc_server_new_client(server, sock, packet);
2632 case SILC_PACKET_NEW_SERVER:
2634 * Received new server packet. This includes Server ID and some other
2635 * information that we may save. This is received after server has
2638 if (packet->flags & SILC_PACKET_FLAG_LIST)
2640 silc_server_new_server(server, sock, packet);
2643 case SILC_PACKET_NEW_CHANNEL:
2645 * Received new channel packet. Information about new channel in the
2646 * network are distributed using this packet.
2648 if (packet->flags & SILC_PACKET_FLAG_LIST)
2649 silc_server_new_channel_list(server, sock, packet);
2651 silc_server_new_channel(server, sock, packet);
2654 case SILC_PACKET_HEARTBEAT:
2656 * Received heartbeat.
2658 if (packet->flags & SILC_PACKET_FLAG_LIST)
2662 case SILC_PACKET_KEY_AGREEMENT:
2664 * Received heartbeat.
2666 if (packet->flags & SILC_PACKET_FLAG_LIST)
2668 silc_server_key_agreement(server, sock, packet);
2671 case SILC_PACKET_REKEY:
2673 * Received re-key packet. The sender wants to regenerate the session
2676 if (packet->flags & SILC_PACKET_FLAG_LIST)
2678 silc_server_rekey(server, sock, packet);
2681 case SILC_PACKET_REKEY_DONE:
2683 * The re-key is done.
2685 if (packet->flags & SILC_PACKET_FLAG_LIST)
2688 if (sock->protocol && sock->protocol->protocol &&
2689 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2691 SilcServerRekeyInternalContext *proto_ctx =
2692 (SilcServerRekeyInternalContext *)sock->protocol->context;
2694 if (proto_ctx->packet)
2695 silc_packet_context_free(proto_ctx->packet);
2697 proto_ctx->packet = silc_packet_context_dup(packet);
2699 /* Let the protocol handle the packet */
2700 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2702 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2703 "protocol active, packet dropped."));
2707 case SILC_PACKET_FTP:
2709 if (packet->flags & SILC_PACKET_FLAG_LIST)
2711 silc_server_ftp(server, sock, packet);
2714 case SILC_PACKET_RESUME_CLIENT:
2716 if (packet->flags & SILC_PACKET_FLAG_LIST)
2718 silc_server_resume_client(server, sock, packet);
2721 case SILC_PACKET_RESUME_ROUTER:
2722 /* Resume router packet received. This packet is received for backup
2723 router resuming protocol. */
2724 if (packet->flags & SILC_PACKET_FLAG_LIST)
2726 silc_server_backup_resume_router(server, sock, packet);
2730 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2735 /* Creates connection to a remote router. */
2737 void silc_server_create_connection(SilcServer server,
2738 const char *remote_host, SilcUInt32 port)
2740 SilcServerConnection sconn;
2742 /* Allocate connection object for hold connection specific stuff. */
2743 sconn = silc_calloc(1, sizeof(*sconn));
2744 sconn->server = server;
2745 sconn->remote_host = strdup(remote_host);
2746 sconn->remote_port = port;
2747 sconn->no_reconnect = TRUE;
2749 silc_schedule_task_add(server->schedule, 0,
2750 silc_server_connect_router,
2751 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2752 SILC_TASK_PRI_NORMAL);
2755 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2757 silc_socket_free(context);
2760 /* Closes connection to socket connection */
2762 void silc_server_close_connection(SilcServer server,
2763 SilcSocketConnection sock)
2765 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2766 silc_schedule_task_add(server->schedule, 0,
2767 silc_server_close_connection_final,
2768 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2769 SILC_TASK_PRI_NORMAL);
2773 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2775 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2776 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2777 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2780 /* We won't listen for this connection anymore */
2781 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2783 /* Unregister all tasks */
2784 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2786 /* Close the actual connection */
2787 silc_net_close_connection(sock->sock);
2788 server->sockets[sock->sock] = NULL;
2790 /* If sock->user_data is NULL then we'll check for active protocols
2791 here since the silc_server_free_sock_user_data has not been called
2792 for this connection. */
2793 if (!sock->user_data) {
2794 /* If any protocol is active cancel its execution. It will call
2795 the final callback which will finalize the disconnection. */
2796 if (sock->protocol) {
2797 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2798 silc_protocol_cancel(sock->protocol, server->schedule);
2799 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2800 silc_protocol_execute_final(sock->protocol, server->schedule);
2801 sock->protocol = NULL;
2806 silc_schedule_task_add(server->schedule, 0,
2807 silc_server_close_connection_final,
2808 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2809 SILC_TASK_PRI_NORMAL);
2812 /* Sends disconnect message to remote connection and disconnects the
2815 void silc_server_disconnect_remote(SilcServer server,
2816 SilcSocketConnection sock,
2817 SilcStatus status, ...)
2820 unsigned char buf[512];
2828 memset(buf, 0, sizeof(buf));
2829 va_start(ap, status);
2830 cp = va_arg(ap, char *);
2832 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2837 SILC_LOG_DEBUG(("Disconnecting remote host"));
2839 /* Notify remote end that the conversation is over. The notify message
2840 is tried to be sent immediately. */
2844 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2846 buffer = silc_buffer_alloc_size(len);
2850 buffer->data[0] = status;
2852 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2854 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2855 buffer->data, buffer->len, TRUE);
2856 silc_buffer_free(buffer);
2859 silc_server_packet_queue_purge(server, sock);
2861 /* Mark the connection to be disconnected */
2862 SILC_SET_DISCONNECTED(sock);
2863 silc_server_close_connection(server, sock);
2868 SilcClientEntry client;
2869 } *FreeClientInternal;
2871 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2873 FreeClientInternal i = (FreeClientInternal)context;
2875 assert(!silc_hash_table_count(i->client->channels));
2877 silc_idlist_del_data(i->client);
2878 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2882 /* Frees client data and notifies about client's signoff. */
2884 void silc_server_free_client_data(SilcServer server,
2885 SilcSocketConnection sock,
2886 SilcClientEntry client,
2888 const char *signoff)
2890 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2892 SILC_LOG_DEBUG(("Freeing client data"));
2895 if (!client->router && !client->connection &&
2896 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2897 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2898 SILC_LOG_ERROR(("****** Contact Pekka"));
2899 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2904 /* If there is pending outgoing data for the client then purge it
2905 to the network before removing the client entry. */
2906 silc_server_packet_queue_purge(server, sock);
2909 /* Check if anyone is watching this nickname */
2910 if (server->server_type == SILC_ROUTER)
2911 silc_server_check_watcher_list(server, client, NULL,
2912 SILC_NOTIFY_TYPE_SIGNOFF);
2914 /* Send SIGNOFF notify to routers. */
2916 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2917 SILC_BROADCAST(server), client->id,
2921 /* Remove client from all channels */
2923 silc_server_remove_from_channels(server, NULL, client,
2924 TRUE, (char *)signoff, TRUE);
2926 silc_server_remove_from_channels(server, NULL, client,
2927 FALSE, NULL, FALSE);
2929 /* Remove this client from watcher list if it is */
2930 silc_server_del_from_watcher_list(server, client);
2932 /* Update statistics */
2933 server->stat.my_clients--;
2934 server->stat.clients--;
2935 if (server->stat.cell_clients)
2936 server->stat.cell_clients--;
2937 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2938 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2939 silc_schedule_task_del_by_context(server->schedule, client);
2941 /* We will not delete the client entry right away. We will take it
2942 into history (for WHOWAS command) for 5 minutes */
2945 silc_schedule_task_add(server->schedule, 0,
2946 silc_server_free_client_data_timeout,
2948 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2949 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2950 client->data.status &= ~SILC_IDLIST_STATUS_LOCAL;
2952 client->router = NULL;
2953 client->connection = NULL;
2956 /* Frees user_data pointer from socket connection object. This also sends
2957 appropriate notify packets to the network to inform about leaving
2960 void silc_server_free_sock_user_data(SilcServer server,
2961 SilcSocketConnection sock,
2962 const char *signoff_message)
2964 switch (sock->type) {
2965 case SILC_SOCKET_TYPE_CLIENT:
2967 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2968 silc_server_free_client_data(server, sock, user_data, TRUE,
2972 case SILC_SOCKET_TYPE_SERVER:
2973 case SILC_SOCKET_TYPE_ROUTER:
2975 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2976 SilcServerEntry backup_router = NULL;
2978 SILC_LOG_DEBUG(("Freeing server data"));
2981 backup_router = silc_server_backup_get(server, user_data->id);
2983 if (!server->backup_router && server->server_type == SILC_ROUTER &&
2984 backup_router == server->id_entry &&
2985 sock->type != SILC_SOCKET_TYPE_ROUTER)
2986 backup_router = NULL;
2988 /* If this was our primary router connection then we're lost to
2989 the outside world. */
2990 if (server->router == user_data) {
2991 /* Check whether we have a backup router connection */
2992 if (!backup_router || backup_router == user_data) {
2993 silc_schedule_task_add(server->schedule, 0,
2994 silc_server_connect_to_router,
2997 SILC_TASK_PRI_NORMAL);
2999 server->id_entry->router = NULL;
3000 server->router = NULL;
3001 server->standalone = TRUE;
3002 backup_router = NULL;
3004 if (server->id_entry != backup_router) {
3005 SILC_LOG_INFO(("New primary router is backup router %s",
3006 backup_router->server_name));
3007 server->id_entry->router = backup_router;
3008 server->router = backup_router;
3009 server->router_connect = time(0);
3010 server->backup_primary = TRUE;
3012 SILC_LOG_INFO(("We are now new primary router in this cell"));
3013 server->id_entry->router = NULL;
3014 server->router = NULL;
3015 server->standalone = TRUE;
3017 /* We stop here to take a breath */
3021 if (server->server_type == SILC_BACKUP_ROUTER) {
3022 server->server_type = SILC_ROUTER;
3024 /* We'll need to constantly try to reconnect to the primary
3025 router so that we'll see when it comes back online. */
3026 silc_server_backup_reconnect(server, sock->ip, sock->port,
3027 silc_server_backup_connected,
3031 /* Mark this connection as replaced */
3032 silc_server_backup_replaced_add(server, user_data->id,
3035 } else if (backup_router) {
3036 SILC_LOG_INFO(("Enabling the use of backup router %s",
3037 backup_router->server_name));
3038 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3039 backup_router->server_name));
3041 /* Mark this connection as replaced */
3042 silc_server_backup_replaced_add(server, user_data->id,
3046 if (!backup_router) {
3047 /* Remove all servers that are originated from this server, and
3048 remove the clients of those servers too. */
3049 silc_server_remove_servers_by_server(server, user_data, TRUE);
3051 /* Remove the clients that this server owns as they will become
3053 silc_server_remove_clients_by_server(server, user_data,
3056 /* Remove channels owned by this server */
3057 if (server->server_type == SILC_SERVER)
3058 silc_server_remove_channels_by_server(server, user_data);
3060 /* Enable local server connections that may be disabled */
3061 silc_server_local_servers_toggle_enabled(server, TRUE);
3063 /* Update the client entries of this server to the new backup
3064 router. If we are the backup router we also resolve the real
3065 servers for the clients. After updating is over this also
3066 removes the clients that this server explicitly owns. */
3067 silc_server_update_clients_by_server(server, user_data,
3068 backup_router, TRUE);
3070 /* If we are router and just lost our primary router (now standlaone)
3071 we remove everything that was behind it, since we don't know
3073 if (server->server_type == SILC_ROUTER && server->standalone)
3074 /* Remove all servers that are originated from this server, and
3075 remove the clients of those servers too. */
3076 silc_server_remove_servers_by_server(server, user_data, TRUE);
3078 /* Finally remove the clients that are explicitly owned by this
3079 server. They go down with the server. */
3080 silc_server_remove_clients_by_server(server, user_data,
3083 /* Update our server cache to use the new backup router too. */
3084 silc_server_update_servers_by_server(server, user_data, backup_router);
3085 if (server->server_type == SILC_SERVER)
3086 silc_server_update_channels_by_server(server, user_data,
3089 /* Send notify about primary router going down to local operators */
3090 if (server->backup_router)
3091 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3092 SILC_NOTIFY_TYPE_NONE,
3093 ("%s switched to backup router %s "
3094 "(we are primary router now)",
3095 server->server_name, server->server_name));
3096 else if (server->router)
3097 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3098 SILC_NOTIFY_TYPE_NONE,
3099 ("%s switched to backup router %s",
3100 server->server_name,
3101 server->router->server_name));
3104 /* Free the server entry */
3105 silc_server_backup_del(server, user_data);
3106 silc_server_backup_replaced_del(server, user_data);
3107 silc_idlist_del_data(user_data);
3108 if (!silc_idlist_del_server(server->local_list, user_data))
3109 silc_idlist_del_server(server->global_list, user_data);
3110 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3111 server->stat.my_servers--;
3113 server->stat.my_routers--;
3114 server->stat.routers--;
3116 server->stat.servers--;
3117 if (server->server_type == SILC_ROUTER)
3118 server->stat.cell_servers--;
3120 if (backup_router && backup_router != server->id_entry) {
3121 /* Announce all of our stuff that was created about 5 minutes ago.
3122 The backup router knows all the other stuff already. */
3123 if (server->server_type == SILC_ROUTER)
3124 silc_server_announce_servers(server, FALSE, time(0) - 300,
3125 backup_router->connection);
3127 /* Announce our clients and channels to the router */
3128 silc_server_announce_clients(server, time(0) - 300,
3129 backup_router->connection);
3130 silc_server_announce_channels(server, time(0) - 300,
3131 backup_router->connection);
3137 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3139 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3141 silc_idlist_del_data(user_data);
3142 silc_free(user_data);
3147 /* If any protocol is active cancel its execution */
3148 if (sock->protocol) {
3149 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3150 silc_protocol_cancel(sock->protocol, server->schedule);
3151 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3152 silc_protocol_execute_final(sock->protocol, server->schedule);
3153 sock->protocol = NULL;
3156 sock->user_data = NULL;
3159 /* Removes client from all channels it has joined. This is used when client
3160 connection is disconnected. If the client on a channel is last, the
3161 channel is removed as well. This sends the SIGNOFF notify types. */
3163 void silc_server_remove_from_channels(SilcServer server,
3164 SilcSocketConnection sock,
3165 SilcClientEntry client,
3167 const char *signoff_message,
3170 SilcChannelEntry channel;
3171 SilcChannelClientEntry chl;
3172 SilcHashTableList htl;
3173 SilcBuffer clidp = NULL;
3178 SILC_LOG_DEBUG(("Removing client from joined channels"));
3180 if (notify && !client->id)
3184 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3189 /* Remove the client from all channels. The client is removed from
3190 the channels' user list. */
3191 silc_hash_table_list(client->channels, &htl);
3192 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3193 channel = chl->channel;
3195 /* Remove channel if this is last client leaving the channel, unless
3196 the channel is permanent. */
3197 if (server->server_type != SILC_SERVER &&
3198 silc_hash_table_count(channel->user_list) < 2) {
3199 silc_server_channel_delete(server, channel);
3203 silc_hash_table_del(client->channels, channel);
3204 silc_hash_table_del(channel->user_list, chl->client);
3205 channel->user_count--;
3207 /* If there is no global users on the channel anymore mark the channel
3208 as local channel. Do not check if the removed client is local client. */
3209 if (server->server_type == SILC_SERVER && channel->global_users &&
3210 chl->client->router && !silc_server_channel_has_global(channel))
3211 channel->global_users = FALSE;
3215 /* Update statistics */
3216 if (SILC_IS_LOCAL(client))
3217 server->stat.my_chanclients--;
3218 if (server->server_type == SILC_ROUTER) {
3219 server->stat.cell_chanclients--;
3220 server->stat.chanclients--;
3223 /* If there is not at least one local user on the channel then we don't
3224 need the channel entry anymore, we can remove it safely, unless the
3225 channel is permanent channel */
3226 if (server->server_type == SILC_SERVER &&
3227 !silc_server_channel_has_local(channel)) {
3228 /* Notify about leaving client if this channel has global users. */
3229 if (notify && channel->global_users)
3230 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3231 SILC_NOTIFY_TYPE_SIGNOFF,
3232 signoff_message ? 2 : 1,
3233 clidp->data, clidp->len,
3234 signoff_message, signoff_message ?
3235 strlen(signoff_message) : 0);
3237 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3238 silc_server_channel_delete(server, channel);
3242 /* Send notify to channel about client leaving SILC and channel too */
3244 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3245 SILC_NOTIFY_TYPE_SIGNOFF,
3246 signoff_message ? 2 : 1,
3247 clidp->data, clidp->len,
3248 signoff_message, signoff_message ?
3249 strlen(signoff_message) : 0);
3251 /* Don't create keys if we are shutting down */
3252 if (server->server_shutdown)
3255 /* Re-generate channel key if needed */
3256 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3257 if (!silc_server_create_channel_key(server, channel, 0))
3260 /* Send the channel key to the channel. The key of course is not sent
3261 to the client who was removed from the channel. */
3262 silc_server_send_channel_key(server, client->connection, channel,
3263 server->server_type == SILC_ROUTER ?
3264 FALSE : !server->standalone);
3268 silc_hash_table_list_reset(&htl);
3270 silc_buffer_free(clidp);
3273 /* Removes client from one channel. This is used for example when client
3274 calls LEAVE command to remove itself from the channel. Returns TRUE
3275 if channel still exists and FALSE if the channel is removed when
3276 last client leaves the channel. If `notify' is FALSE notify messages
3279 bool silc_server_remove_from_one_channel(SilcServer server,
3280 SilcSocketConnection sock,
3281 SilcChannelEntry channel,
3282 SilcClientEntry client,
3285 SilcChannelClientEntry chl;
3288 SILC_LOG_DEBUG(("Removing %s from channel %s",
3289 silc_id_render(client->id, SILC_ID_CLIENT),
3290 channel->channel_name));
3292 /* Get the entry to the channel, if this client is not on the channel
3294 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3297 /* Remove channel if this is last client leaving the channel, unless
3298 the channel is permanent. */
3299 if (server->server_type != SILC_SERVER &&
3300 silc_hash_table_count(channel->user_list) < 2) {
3301 silc_server_channel_delete(server, channel);
3305 silc_hash_table_del(client->channels, chl->channel);
3306 silc_hash_table_del(channel->user_list, chl->client);
3307 channel->user_count--;
3309 /* If there is no global users on the channel anymore mark the channel
3310 as local channel. Do not check if the client is local client. */
3311 if (server->server_type == SILC_SERVER && channel->global_users &&
3312 chl->client->router && !silc_server_channel_has_global(channel))
3313 channel->global_users = FALSE;
3317 /* Update statistics */
3318 if (SILC_IS_LOCAL(client))
3319 server->stat.my_chanclients--;
3320 if (server->server_type == SILC_ROUTER) {
3321 server->stat.cell_chanclients--;
3322 server->stat.chanclients--;
3325 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3329 /* If there is not at least one local user on the channel then we don't
3330 need the channel entry anymore, we can remove it safely, unless the
3331 channel is permanent channel */
3332 if (server->server_type == SILC_SERVER &&
3333 !silc_server_channel_has_local(channel)) {
3334 /* Notify about leaving client if this channel has global users. */
3335 if (notify && channel->global_users)
3336 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3337 SILC_NOTIFY_TYPE_LEAVE, 1,
3338 clidp->data, clidp->len);
3340 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3341 silc_server_channel_delete(server, channel);
3342 silc_buffer_free(clidp);
3346 /* Send notify to channel about client leaving the channel */
3348 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3349 SILC_NOTIFY_TYPE_LEAVE, 1,
3350 clidp->data, clidp->len);
3352 silc_buffer_free(clidp);
3356 /* Timeout callback. This is called if connection is idle or for some
3357 other reason is not responding within some period of time. This
3358 disconnects the remote end. */
3360 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3362 SilcServer server = (SilcServer)context;
3363 SilcSocketConnection sock = server->sockets[fd];
3364 SilcProtocolType protocol = 0;
3366 SILC_LOG_DEBUG(("Start"));
3371 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3372 sock->hostname, sock->ip));
3374 /* If we have protocol active we must assure that we call the protocol's
3375 final callback so that all the memory is freed. */
3376 if (sock->protocol) {
3377 protocol = sock->protocol->protocol->type;
3378 silc_protocol_cancel(sock->protocol, server->schedule);
3379 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3380 silc_protocol_execute_final(sock->protocol, server->schedule);
3381 sock->protocol = NULL;
3385 if (sock->user_data)
3386 silc_server_free_sock_user_data(server, sock, NULL);
3388 silc_server_disconnect_remote(server, sock,
3390 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3391 SILC_STATUS_ERR_AUTH_FAILED :
3392 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3393 "Connection timeout");
3396 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3397 function may be used only by router. In real SILC network all channels
3398 are created by routers thus this function is never used by normal
3401 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3402 SilcServerID *router_id,
3408 SilcChannelID *channel_id;
3409 SilcChannelEntry entry;
3413 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3416 cipher = SILC_DEFAULT_CIPHER;
3418 hmac = SILC_DEFAULT_HMAC;
3420 /* Allocate cipher */
3421 if (!silc_cipher_alloc(cipher, &key))
3425 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3426 silc_cipher_free(key);
3430 channel_name = strdup(channel_name);
3432 /* Create the channel ID */
3433 if (!silc_id_create_channel_id(server, router_id, server->rng,
3435 silc_free(channel_name);
3436 silc_cipher_free(key);
3437 silc_hmac_free(newhmac);
3441 /* Create the channel */
3442 entry = silc_idlist_add_channel(server->local_list, channel_name,
3443 SILC_CHANNEL_MODE_NONE, channel_id,
3444 NULL, key, newhmac, 0);
3446 silc_free(channel_name);
3447 silc_cipher_free(key);
3448 silc_hmac_free(newhmac);
3449 silc_free(channel_id);
3453 entry->cipher = strdup(cipher);
3454 entry->hmac_name = strdup(hmac);
3456 /* Now create the actual key material */
3457 if (!silc_server_create_channel_key(server, entry,
3458 silc_cipher_get_key_len(key) / 8)) {
3459 silc_idlist_del_channel(server->local_list, entry);
3463 /* Notify other routers about the new channel. We send the packet
3464 to our primary route. */
3466 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3467 channel_name, entry->id,
3468 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3471 /* Distribute to backup routers */
3472 if (broadcast && server->server_type == SILC_ROUTER) {
3475 SilcUInt32 name_len = strlen(channel_name);
3476 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3477 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3479 packet = silc_channel_payload_encode(channel_name, name_len,
3480 cid, channel_id_len, entry->mode);
3481 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3482 packet->data, packet->len, FALSE, TRUE);
3484 silc_buffer_free(packet);
3487 server->stat.my_channels++;
3488 if (server->server_type == SILC_ROUTER) {
3489 server->stat.channels++;
3490 server->stat.cell_channels++;
3491 entry->users_resolved = TRUE;
3497 /* Same as above but creates the channel with Channel ID `channel_id. */
3500 silc_server_create_new_channel_with_id(SilcServer server,
3504 SilcChannelID *channel_id,
3507 SilcChannelEntry entry;
3511 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3514 cipher = SILC_DEFAULT_CIPHER;
3516 hmac = SILC_DEFAULT_HMAC;
3518 /* Allocate cipher */
3519 if (!silc_cipher_alloc(cipher, &key))
3523 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3524 silc_cipher_free(key);
3528 channel_name = strdup(channel_name);
3530 /* Create the channel */
3531 entry = silc_idlist_add_channel(server->local_list, channel_name,
3532 SILC_CHANNEL_MODE_NONE, channel_id,
3533 NULL, key, newhmac, 0);
3535 silc_cipher_free(key);
3536 silc_hmac_free(newhmac);
3537 silc_free(channel_name);
3541 /* Now create the actual key material */
3542 if (!silc_server_create_channel_key(server, entry,
3543 silc_cipher_get_key_len(key) / 8)) {
3544 silc_idlist_del_channel(server->local_list, entry);
3548 /* Notify other routers about the new channel. We send the packet
3549 to our primary route. */
3551 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3552 channel_name, entry->id,
3553 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3556 /* Distribute to backup routers */
3557 if (broadcast && server->server_type == SILC_ROUTER) {
3560 SilcUInt32 name_len = strlen(channel_name);
3561 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3562 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3564 packet = silc_channel_payload_encode(channel_name, name_len,
3565 cid, channel_id_len, entry->mode);
3566 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3567 packet->data, packet->len, FALSE, TRUE);
3569 silc_buffer_free(packet);
3572 server->stat.my_channels++;
3573 if (server->server_type == SILC_ROUTER) {
3574 server->stat.channels++;
3575 server->stat.cell_channels++;
3576 entry->users_resolved = TRUE;
3582 /* Channel's key re-key timeout callback. */
3584 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3586 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3587 SilcServer server = (SilcServer)rekey->context;
3591 /* Return now if we are shutting down */
3592 if (server->server_shutdown)
3595 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3598 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3601 /* Generates new channel key. This is used to create the initial channel key
3602 but also to re-generate new key for channel. If `key_len' is provided
3603 it is the bytes of the key length. */
3605 bool silc_server_create_channel_key(SilcServer server,
3606 SilcChannelEntry channel,
3610 unsigned char channel_key[32], hash[32];
3613 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3614 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3618 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3620 if (!channel->channel_key)
3621 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3622 channel->channel_key = NULL;
3628 else if (channel->key_len)
3629 len = channel->key_len / 8;
3631 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3633 /* Create channel key */
3634 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3637 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3639 /* Remove old key if exists */
3641 memset(channel->key, 0, channel->key_len / 8);
3642 silc_free(channel->key);
3646 channel->key_len = len * 8;
3647 channel->key = silc_memdup(channel_key, len);
3648 memset(channel_key, 0, sizeof(channel_key));
3650 /* Generate HMAC key from the channel key data and set it */
3652 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3653 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3654 silc_hmac_set_key(channel->hmac, hash,
3655 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3656 memset(hash, 0, sizeof(hash));
3658 if (server->server_type == SILC_ROUTER) {
3659 if (!channel->rekey)
3660 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3661 channel->rekey->context = (void *)server;
3662 channel->rekey->channel = channel;
3663 channel->rekey->key_len = key_len;
3664 if (channel->rekey->task)
3665 silc_schedule_task_del(server->schedule, channel->rekey->task);
3667 channel->rekey->task =
3668 silc_schedule_task_add(server->schedule, 0,
3669 silc_server_channel_key_rekey,
3670 (void *)channel->rekey,
3671 server->config->channel_rekey_secs, 0,
3673 SILC_TASK_PRI_NORMAL);
3679 /* Saves the channel key found in the encoded `key_payload' buffer. This
3680 function is used when we receive Channel Key Payload and also when we're
3681 processing JOIN command reply. Returns entry to the channel. */
3683 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3684 SilcBuffer key_payload,
3685 SilcChannelEntry channel)
3687 SilcChannelKeyPayload payload = NULL;
3688 SilcChannelID *id = NULL;
3689 unsigned char *tmp, hash[32];
3693 /* Decode channel key payload */
3694 payload = silc_channel_key_payload_parse(key_payload->data,
3697 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3702 /* Get the channel entry */
3705 /* Get channel ID */
3706 tmp = silc_channel_key_get_id(payload, &tmp_len);
3707 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3713 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3715 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3717 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3718 silc_id_render(id, SILC_ID_CHANNEL)));
3724 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3726 tmp = silc_channel_key_get_key(payload, &tmp_len);
3732 cipher = silc_channel_key_get_cipher(payload, NULL);
3738 /* Remove old key if exists */
3740 memset(channel->key, 0, channel->key_len / 8);
3741 silc_free(channel->key);
3742 silc_cipher_free(channel->channel_key);
3745 /* Create new cipher */
3746 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3747 channel->channel_key = NULL;
3752 if (channel->cipher)
3753 silc_free(channel->cipher);
3754 channel->cipher = strdup(cipher);
3757 channel->key_len = tmp_len * 8;
3758 channel->key = silc_memdup(tmp, tmp_len);
3759 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3761 /* Generate HMAC key from the channel key data and set it */
3763 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3764 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3765 silc_hmac_set_key(channel->hmac, hash,
3766 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3768 memset(hash, 0, sizeof(hash));
3769 memset(tmp, 0, tmp_len);
3771 if (server->server_type == SILC_ROUTER) {
3772 if (!channel->rekey)
3773 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3774 channel->rekey->context = (void *)server;
3775 channel->rekey->channel = channel;
3776 if (channel->rekey->task)
3777 silc_schedule_task_del(server->schedule, channel->rekey->task);
3779 channel->rekey->task =
3780 silc_schedule_task_add(server->schedule, 0,
3781 silc_server_channel_key_rekey,
3782 (void *)channel->rekey,
3783 server->config->channel_rekey_secs, 0,
3785 SILC_TASK_PRI_NORMAL);
3791 silc_channel_key_payload_free(payload);
3796 /* Heartbeat callback. This function is set as argument for the
3797 silc_socket_set_heartbeat function. The library will call this function
3798 at the set time interval. */
3800 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3803 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3805 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3807 /* Send the heartbeat */
3808 silc_server_send_heartbeat(hb->server, sock);
3811 /* Returns assembled of all servers in the given ID list. The packet's
3812 form is dictated by the New ID payload. */
3814 static void silc_server_announce_get_servers(SilcServer server,
3815 SilcServerEntry remote,
3817 SilcBuffer *servers,
3818 unsigned long creation_time)
3820 SilcIDCacheList list;
3821 SilcIDCacheEntry id_cache;
3822 SilcServerEntry entry;
3825 /* Go through all clients in the list */
3826 if (silc_idcache_get_all(id_list->servers, &list)) {
3827 if (silc_idcache_list_first(list, &id_cache)) {
3829 entry = (SilcServerEntry)id_cache->context;
3831 /* Do not announce the one we've sending our announcements and
3832 do not announce ourself. Also check the creation time if it's
3834 if ((entry == remote) || (entry == server->id_entry) ||
3835 (creation_time && entry->data.created < creation_time)) {
3836 if (!silc_idcache_list_next(list, &id_cache))
3841 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3843 *servers = silc_buffer_realloc(*servers,
3845 (*servers)->truelen + idp->len :
3847 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3848 silc_buffer_put(*servers, idp->data, idp->len);
3849 silc_buffer_pull(*servers, idp->len);
3850 silc_buffer_free(idp);
3852 if (!silc_idcache_list_next(list, &id_cache))
3857 silc_idcache_list_free(list);
3862 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3868 p = silc_notify_payload_encode(notify, argc, ap);
3874 /* This function is used by router to announce existing servers to our
3875 primary router when we've connected to it. If `creation_time' is non-zero
3876 then only the servers that has been created after the `creation_time'
3877 will be announced. */
3879 void silc_server_announce_servers(SilcServer server, bool global,
3880 unsigned long creation_time,
3881 SilcSocketConnection remote)
3883 SilcBuffer servers = NULL;
3885 SILC_LOG_DEBUG(("Announcing servers"));
3887 /* Get servers in local list */
3888 silc_server_announce_get_servers(server, remote->user_data,
3889 server->local_list, &servers,
3893 /* Get servers in global list */
3894 silc_server_announce_get_servers(server, remote->user_data,
3895 server->global_list, &servers,
3899 silc_buffer_push(servers, servers->data - servers->head);
3900 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3902 /* Send the packet */
3903 silc_server_packet_send(server, remote,
3904 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3905 servers->data, servers->len, TRUE);
3907 silc_buffer_free(servers);
3911 /* Returns assembled packet of all clients in the given ID list. The
3912 packet's form is dictated by the New ID Payload. */
3914 static void silc_server_announce_get_clients(SilcServer server,
3916 SilcBuffer *clients,
3918 unsigned long creation_time)
3920 SilcIDCacheList list;
3921 SilcIDCacheEntry id_cache;
3922 SilcClientEntry client;
3925 unsigned char mode[4];
3927 /* Go through all clients in the list */
3928 if (silc_idcache_get_all(id_list->clients, &list)) {
3929 if (silc_idcache_list_first(list, &id_cache)) {
3931 client = (SilcClientEntry)id_cache->context;
3933 if (creation_time && client->data.created < creation_time) {
3934 if (!silc_idcache_list_next(list, &id_cache))
3938 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) &&
3939 !client->connection && !client->router && !SILC_IS_LOCAL(client)) {
3940 if (!silc_idcache_list_next(list, &id_cache))
3945 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3947 *clients = silc_buffer_realloc(*clients,
3949 (*clients)->truelen + idp->len :
3951 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3952 silc_buffer_put(*clients, idp->data, idp->len);
3953 silc_buffer_pull(*clients, idp->len);
3955 SILC_PUT32_MSB(client->mode, mode);
3957 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3958 2, idp->data, idp->len,
3960 *umodes = silc_buffer_realloc(*umodes,
3962 (*umodes)->truelen + tmp->len :
3964 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3965 silc_buffer_put(*umodes, tmp->data, tmp->len);
3966 silc_buffer_pull(*umodes, tmp->len);
3967 silc_buffer_free(tmp);
3969 silc_buffer_free(idp);
3971 if (!silc_idcache_list_next(list, &id_cache))
3976 silc_idcache_list_free(list);
3980 /* This function is used to announce our existing clients to our router
3981 when we've connected to it. If `creation_time' is non-zero then only
3982 the clients that has been created after the `creation_time' will be
3985 void silc_server_announce_clients(SilcServer server,
3986 unsigned long creation_time,
3987 SilcSocketConnection remote)
3989 SilcBuffer clients = NULL;
3990 SilcBuffer umodes = NULL;
3992 SILC_LOG_DEBUG(("Announcing clients"));
3994 /* Get clients in local list */
3995 silc_server_announce_get_clients(server, server->local_list,
3996 &clients, &umodes, creation_time);
3998 /* As router we announce our global list as well */
3999 if (server->server_type == SILC_ROUTER)
4000 silc_server_announce_get_clients(server, server->global_list,
4001 &clients, &umodes, creation_time);
4004 silc_buffer_push(clients, clients->data - clients->head);
4005 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
4007 /* Send the packet */
4008 silc_server_packet_send(server, remote,
4009 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
4010 clients->data, clients->len, TRUE);
4012 silc_buffer_free(clients);
4016 silc_buffer_push(umodes, umodes->data - umodes->head);
4017 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4019 /* Send the packet */
4020 silc_server_packet_send(server, remote,
4021 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4022 umodes->data, umodes->len, TRUE);
4024 silc_buffer_free(umodes);
4028 /* Returns channel's topic for announcing it */
4030 void silc_server_announce_get_channel_topic(SilcServer server,
4031 SilcChannelEntry channel,
4036 if (channel->topic) {
4037 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4038 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4039 chidp->data, chidp->len,
4041 strlen(channel->topic));
4042 silc_buffer_free(chidp);
4046 /* Returns assembled packets for channel users of the `channel'. */
4048 void silc_server_announce_get_channel_users(SilcServer server,
4049 SilcChannelEntry channel,
4050 SilcBuffer *channel_modes,
4051 SilcBuffer *channel_users,
4052 SilcBuffer *channel_users_modes)
4054 SilcChannelClientEntry chl;
4055 SilcHashTableList htl;
4056 SilcBuffer chidp, clidp, csidp;
4059 unsigned char mode[4], *fkey = NULL;
4060 SilcUInt32 fkey_len = 0;
4063 SILC_LOG_DEBUG(("Start"));
4065 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4066 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4069 SILC_PUT32_MSB(channel->mode, mode);
4070 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4071 if (channel->founder_key)
4072 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4074 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4075 6, csidp->data, csidp->len,
4078 hmac, hmac ? strlen(hmac) : 0,
4079 channel->passphrase,
4080 channel->passphrase ?
4081 strlen(channel->passphrase) : 0,
4085 silc_buffer_realloc(*channel_modes,
4087 (*channel_modes)->truelen + len : len));
4088 silc_buffer_pull_tail(*channel_modes,
4089 ((*channel_modes)->end -
4090 (*channel_modes)->data));
4091 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4092 silc_buffer_pull(*channel_modes, len);
4093 silc_buffer_free(tmp);
4098 /* Now find all users on the channel */
4099 silc_hash_table_list(channel->user_list, &htl);
4100 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4101 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4104 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4105 clidp->data, clidp->len,
4106 chidp->data, chidp->len);
4109 silc_buffer_realloc(*channel_users,
4111 (*channel_users)->truelen + len : len));
4112 silc_buffer_pull_tail(*channel_users,
4113 ((*channel_users)->end -
4114 (*channel_users)->data));
4116 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4117 silc_buffer_pull(*channel_users, len);
4118 silc_buffer_free(tmp);
4120 /* CUMODE notify for mode change on the channel */
4121 SILC_PUT32_MSB(chl->mode, mode);
4122 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4123 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4124 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4125 4, csidp->data, csidp->len,
4127 clidp->data, clidp->len,
4130 *channel_users_modes =
4131 silc_buffer_realloc(*channel_users_modes,
4132 (*channel_users_modes ?
4133 (*channel_users_modes)->truelen + len : len));
4134 silc_buffer_pull_tail(*channel_users_modes,
4135 ((*channel_users_modes)->end -
4136 (*channel_users_modes)->data));
4138 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4139 silc_buffer_pull(*channel_users_modes, len);
4140 silc_buffer_free(tmp);
4144 silc_buffer_free(clidp);
4146 silc_hash_table_list_reset(&htl);
4147 silc_buffer_free(chidp);
4148 silc_buffer_free(csidp);
4151 /* Returns assembled packets for all channels and users on those channels
4152 from the given ID List. The packets are in the form dictated by the
4153 New Channel and New Channel User payloads. */
4155 void silc_server_announce_get_channels(SilcServer server,
4157 SilcBuffer *channels,
4158 SilcBuffer **channel_modes,
4159 SilcBuffer *channel_users,
4160 SilcBuffer **channel_users_modes,
4161 SilcUInt32 *channel_users_modes_c,
4162 SilcBuffer **channel_topics,
4163 SilcChannelID ***channel_ids,
4164 unsigned long creation_time)
4166 SilcIDCacheList list;
4167 SilcIDCacheEntry id_cache;
4168 SilcChannelEntry channel;
4171 SilcUInt16 name_len;
4173 int i = *channel_users_modes_c;
4176 SILC_LOG_DEBUG(("Start"));
4178 /* Go through all channels in the list */
4179 if (silc_idcache_get_all(id_list->channels, &list)) {
4180 if (silc_idcache_list_first(list, &id_cache)) {
4182 channel = (SilcChannelEntry)id_cache->context;
4184 if (creation_time && channel->created < creation_time)
4189 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4190 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4191 name_len = strlen(channel->channel_name);
4194 len = 4 + name_len + id_len + 4;
4196 silc_buffer_realloc(*channels,
4197 (*channels ? (*channels)->truelen +
4199 silc_buffer_pull_tail(*channels,
4200 ((*channels)->end - (*channels)->data));
4201 silc_buffer_format(*channels,
4202 SILC_STR_UI_SHORT(name_len),
4203 SILC_STR_UI_XNSTRING(channel->channel_name,
4205 SILC_STR_UI_SHORT(id_len),
4206 SILC_STR_UI_XNSTRING(cid, id_len),
4207 SILC_STR_UI_INT(channel->mode),
4209 silc_buffer_pull(*channels, len);
4212 if (creation_time && channel->updated < creation_time)
4218 /* Channel user modes */
4219 *channel_users_modes = silc_realloc(*channel_users_modes,
4220 sizeof(**channel_users_modes) *
4222 (*channel_users_modes)[i] = NULL;
4223 *channel_modes = silc_realloc(*channel_modes,
4224 sizeof(**channel_modes) * (i + 1));
4225 (*channel_modes)[i] = NULL;
4226 *channel_ids = silc_realloc(*channel_ids,
4227 sizeof(**channel_ids) * (i + 1));
4228 (*channel_ids)[i] = NULL;
4229 silc_server_announce_get_channel_users(server, channel,
4230 &(*channel_modes)[i],
4232 &(*channel_users_modes)[i]);
4233 (*channel_ids)[i] = channel->id;
4235 /* Channel's topic */
4236 *channel_topics = silc_realloc(*channel_topics,
4237 sizeof(**channel_topics) * (i + 1));
4238 (*channel_topics)[i] = NULL;
4239 silc_server_announce_get_channel_topic(server, channel,
4240 &(*channel_topics)[i]);
4241 (*channel_users_modes_c)++;
4245 if (!silc_idcache_list_next(list, &id_cache))
4250 silc_idcache_list_free(list);
4254 /* This function is used to announce our existing channels to our router
4255 when we've connected to it. This also announces the users on the
4256 channels to the router. If the `creation_time' is non-zero only the
4257 channels that was created after the `creation_time' are announced.
4258 Note that the channel users are still announced even if the `creation_time'
4261 void silc_server_announce_channels(SilcServer server,
4262 unsigned long creation_time,
4263 SilcSocketConnection remote)
4265 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4266 SilcBuffer *channel_users_modes = NULL;
4267 SilcBuffer *channel_topics = NULL;
4268 SilcUInt32 channel_users_modes_c = 0;
4269 SilcChannelID **channel_ids = NULL;
4271 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4273 /* Get channels and channel users in local list */
4274 silc_server_announce_get_channels(server, server->local_list,
4275 &channels, &channel_modes,
4277 &channel_users_modes,
4278 &channel_users_modes_c,
4280 &channel_ids, creation_time);
4282 /* Get channels and channel users in global list */
4283 if (server->server_type != SILC_SERVER)
4284 silc_server_announce_get_channels(server, server->global_list,
4285 &channels, &channel_modes,
4287 &channel_users_modes,
4288 &channel_users_modes_c,
4290 &channel_ids, creation_time);
4293 silc_buffer_push(channels, channels->data - channels->head);
4294 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4296 /* Send the packet */
4297 silc_server_packet_send(server, remote,
4298 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4299 channels->data, channels->len,
4302 silc_buffer_free(channels);
4305 if (channel_users) {
4306 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4307 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4308 channel_users->len);
4310 /* Send the packet */
4311 silc_server_packet_send(server, remote,
4312 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4313 channel_users->data, channel_users->len,
4316 silc_buffer_free(channel_users);
4319 if (channel_modes) {
4322 for (i = 0; i < channel_users_modes_c; i++) {
4323 if (!channel_modes[i])
4325 silc_buffer_push(channel_modes[i],
4326 channel_modes[i]->data -
4327 channel_modes[i]->head);
4328 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4329 channel_modes[i]->len);
4330 silc_server_packet_send_dest(server, remote,
4331 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4332 channel_ids[i], SILC_ID_CHANNEL,
4333 channel_modes[i]->data,
4334 channel_modes[i]->len,
4336 silc_buffer_free(channel_modes[i]);
4338 silc_free(channel_modes);
4341 if (channel_users_modes) {
4344 for (i = 0; i < channel_users_modes_c; i++) {
4345 if (!channel_users_modes[i])
4347 silc_buffer_push(channel_users_modes[i],
4348 channel_users_modes[i]->data -
4349 channel_users_modes[i]->head);
4350 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4351 channel_users_modes[i]->len);
4352 silc_server_packet_send_dest(server, remote,
4353 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4354 channel_ids[i], SILC_ID_CHANNEL,
4355 channel_users_modes[i]->data,
4356 channel_users_modes[i]->len,
4358 silc_buffer_free(channel_users_modes[i]);
4360 silc_free(channel_users_modes);
4363 if (channel_topics) {
4366 for (i = 0; i < channel_users_modes_c; i++) {
4367 if (!channel_topics[i])
4370 silc_buffer_push(channel_topics[i],
4371 channel_topics[i]->data -
4372 channel_topics[i]->head);
4373 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4374 channel_topics[i]->len);
4375 silc_server_packet_send_dest(server, remote,
4376 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4377 channel_ids[i], SILC_ID_CHANNEL,
4378 channel_topics[i]->data,
4379 channel_topics[i]->len,
4381 silc_buffer_free(channel_topics[i]);
4383 silc_free(channel_topics);
4386 silc_free(channel_ids);
4389 /* Failure timeout callback. If this is called then we will immediately
4390 process the received failure. We always process the failure with timeout
4391 since we do not want to blindly trust to received failure packets.
4392 This won't be called (the timeout is cancelled) if the failure was
4393 bogus (it is bogus if remote does not close the connection after sending
4396 SILC_TASK_CALLBACK(silc_server_failure_callback)
4398 SilcServerFailureContext f = (SilcServerFailureContext)context;
4400 if (f->sock->protocol) {
4401 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4402 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4408 /* Assembles user list and users mode list from the `channel'. */
4410 bool silc_server_get_users_on_channel(SilcServer server,
4411 SilcChannelEntry channel,
4412 SilcBuffer *user_list,
4413 SilcBuffer *mode_list,
4414 SilcUInt32 *user_count)
4416 SilcChannelClientEntry chl;
4417 SilcHashTableList htl;
4418 SilcBuffer client_id_list;
4419 SilcBuffer client_mode_list;
4421 SilcUInt32 list_count = 0, len = 0;
4423 if (!silc_hash_table_count(channel->user_list))
4426 silc_hash_table_list(channel->user_list, &htl);
4427 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4428 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4429 silc_hash_table_list_reset(&htl);
4431 client_id_list = silc_buffer_alloc(len);
4433 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4434 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4435 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4437 silc_hash_table_list(channel->user_list, &htl);
4438 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4440 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4441 silc_buffer_put(client_id_list, idp->data, idp->len);
4442 silc_buffer_pull(client_id_list, idp->len);
4443 silc_buffer_free(idp);
4445 /* Client's mode on channel */
4446 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4447 silc_buffer_pull(client_mode_list, 4);
4451 silc_hash_table_list_reset(&htl);
4452 silc_buffer_push(client_id_list,
4453 client_id_list->data - client_id_list->head);
4454 silc_buffer_push(client_mode_list,
4455 client_mode_list->data - client_mode_list->head);
4457 *user_list = client_id_list;
4458 *mode_list = client_mode_list;
4459 *user_count = list_count;
4463 /* Saves users and their modes to the `channel'. */
4465 void silc_server_save_users_on_channel(SilcServer server,
4466 SilcSocketConnection sock,
4467 SilcChannelEntry channel,
4468 SilcClientID *noadd,
4469 SilcBuffer user_list,
4470 SilcBuffer mode_list,
4471 SilcUInt32 user_count)
4476 SilcClientID *client_id;
4477 SilcClientEntry client;
4478 SilcIDCacheEntry cache;
4479 SilcChannelClientEntry chl;
4481 SILC_LOG_DEBUG(("Start"));
4483 for (i = 0; i < user_count; i++) {
4485 SILC_GET16_MSB(idp_len, user_list->data + 2);
4487 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4488 silc_buffer_pull(user_list, idp_len);
4493 SILC_GET32_MSB(mode, mode_list->data);
4494 silc_buffer_pull(mode_list, 4);
4496 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4497 silc_free(client_id);
4503 /* Check if we have this client cached already. */
4504 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4505 server->server_type, &cache);
4507 client = silc_idlist_find_client_by_id(server->global_list,
4508 client_id, server->server_type,
4511 /* If router did not find such Client ID in its lists then this must
4512 be bogus client or some router in the net is buggy. */
4513 if (server->server_type == SILC_ROUTER) {
4514 silc_free(client_id);
4518 /* We don't have that client anywhere, add it. The client is added
4519 to global list since server didn't have it in the lists so it must be
4521 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4522 silc_id_dup(client_id, SILC_ID_CLIENT),
4523 sock->user_data, NULL, 0);
4525 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4526 silc_free(client_id);
4530 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4535 silc_free(client_id);
4537 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
4538 SILC_LOG_ERROR(("Attempting to add unregistered client to channel ",
4539 "%s", channel->channel_name));
4543 if (!silc_server_client_on_channel(client, channel, &chl)) {
4544 /* Client was not on the channel, add it. */
4545 chl = silc_calloc(1, sizeof(*chl));
4546 chl->client = client;
4548 chl->channel = channel;
4549 silc_hash_table_add(channel->user_list, chl->client, chl);
4550 silc_hash_table_add(client->channels, chl->channel, chl);
4551 channel->user_count++;
4559 /* Saves channels and channels user modes to the `client'. Removes
4560 the client from those channels that are not sent in the list but
4563 void silc_server_save_user_channels(SilcServer server,
4564 SilcSocketConnection sock,
4565 SilcClientEntry client,
4566 SilcBuffer channels,
4567 SilcBuffer channels_user_modes)
4570 SilcUInt32 *chumodes;
4571 SilcChannelPayload entry;
4572 SilcChannelEntry channel;
4573 SilcChannelID *channel_id;
4574 SilcChannelClientEntry chl;
4575 SilcHashTable ht = NULL;
4576 SilcHashTableList htl;
4580 if (!channels || !channels_user_modes ||
4581 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
4584 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4585 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4587 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4588 NULL, NULL, NULL, TRUE);
4589 silc_dlist_start(ch);
4590 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4591 /* Check if we have this channel, and add it if we don't have it.
4592 Also add the client on the channel unless it is there already. */
4593 channel_id = silc_channel_get_id_parse(entry);
4594 channel = silc_idlist_find_channel_by_id(server->local_list,
4597 channel = silc_idlist_find_channel_by_id(server->global_list,
4600 if (server->server_type != SILC_SERVER) {
4601 silc_free(channel_id);
4606 /* We don't have that channel anywhere, add it. */
4607 name = silc_channel_get_name(entry, NULL);
4608 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4609 channel_id, server->router,
4612 silc_free(channel_id);
4619 channel->mode = silc_channel_get_mode(entry);
4621 /* Add the client on the channel */
4622 if (!silc_server_client_on_channel(client, channel, &chl)) {
4623 chl = silc_calloc(1, sizeof(*chl));
4624 chl->client = client;
4625 chl->mode = chumodes[i++];
4626 chl->channel = channel;
4627 silc_hash_table_add(channel->user_list, chl->client, chl);
4628 silc_hash_table_add(client->channels, chl->channel, chl);
4629 channel->user_count++;
4632 chl->mode = chumodes[i++];
4635 silc_hash_table_add(ht, channel, channel);
4636 silc_free(channel_id);
4638 silc_channel_payload_list_free(ch);
4639 silc_free(chumodes);
4643 /* Go through the list again and remove client from channels that
4644 are no part of the list. */
4646 silc_hash_table_list(client->channels, &htl);
4647 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4648 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4649 silc_hash_table_del(chl->channel->user_list, chl->client);
4650 silc_hash_table_del(chl->client->channels, chl->channel);
4654 silc_hash_table_list_reset(&htl);
4655 silc_hash_table_free(ht);
4657 silc_hash_table_list(client->channels, &htl);
4658 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4659 silc_hash_table_del(chl->channel->user_list, chl->client);
4660 silc_hash_table_del(chl->client->channels, chl->channel);
4663 silc_hash_table_list_reset(&htl);
4667 /* Lookups route to the client indicated by the `id_data'. The connection
4668 object and internal data object is returned. Returns NULL if route
4669 could not be found to the client. If the `client_id' is specified then
4670 it is used and the `id_data' is ignored. */
4672 SilcSocketConnection
4673 silc_server_get_client_route(SilcServer server,
4674 unsigned char *id_data,
4676 SilcClientID *client_id,
4677 SilcIDListData *idata,
4678 SilcClientEntry *client_entry)
4681 SilcClientEntry client;
4683 SILC_LOG_DEBUG(("Start"));
4686 *client_entry = NULL;
4688 /* Decode destination Client ID */
4690 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4692 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4696 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4699 /* If the destination belongs to our server we don't have to route
4700 the packet anywhere but to send it to the local destination. */
4701 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4705 /* If we are router and the client has router then the client is in
4706 our cell but not directly connected to us. */
4707 if (server->server_type == SILC_ROUTER && client->router) {
4708 /* We are of course in this case the client's router thus the route
4709 to the client is the server who owns the client. So, we will send
4710 the packet to that server. */
4712 *idata = (SilcIDListData)client->router;
4713 return client->router->connection;
4716 /* Seems that client really is directly connected to us */
4718 *idata = (SilcIDListData)client;
4720 *client_entry = client;
4721 return client->connection;
4724 /* Destination belongs to someone not in this server. If we are normal
4725 server our action is to send the packet to our router. */
4726 if (server->server_type != SILC_ROUTER && !server->standalone) {
4729 *idata = (SilcIDListData)server->router;
4730 return SILC_PRIMARY_ROUTE(server);
4733 /* We are router and we will perform route lookup for the destination
4734 and send the packet to fastest route. */
4735 if (server->server_type == SILC_ROUTER && !server->standalone) {
4736 /* Check first that the ID is valid */
4737 client = silc_idlist_find_client_by_id(server->global_list, id,
4740 SilcSocketConnection dst_sock;
4742 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4746 *idata = (SilcIDListData)dst_sock->user_data;
4755 /* Encodes and returns channel list of channels the `client' has joined.
4756 Secret channels are not put to the list. */
4758 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4759 SilcClientEntry client,
4762 SilcBuffer *user_mode_list)
4764 SilcBuffer buffer = NULL;
4765 SilcChannelEntry channel;
4766 SilcChannelClientEntry chl;
4767 SilcHashTableList htl;
4770 SilcUInt16 name_len;
4774 *user_mode_list = NULL;
4776 silc_hash_table_list(client->channels, &htl);
4777 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4778 channel = chl->channel;
4780 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4782 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4785 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4786 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4787 name_len = strlen(channel->channel_name);
4789 len = 4 + name_len + id_len + 4;
4790 buffer = silc_buffer_realloc(buffer,
4791 (buffer ? buffer->truelen + len : len));
4792 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4793 silc_buffer_format(buffer,
4794 SILC_STR_UI_SHORT(name_len),
4795 SILC_STR_UI_XNSTRING(channel->channel_name,
4797 SILC_STR_UI_SHORT(id_len),
4798 SILC_STR_UI_XNSTRING(cid, id_len),
4799 SILC_STR_UI_INT(chl->channel->mode),
4801 silc_buffer_pull(buffer, len);
4804 if (user_mode_list) {
4805 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4807 (*user_mode_list)->truelen + 4 :
4809 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4810 (*user_mode_list)->data));
4811 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4812 silc_buffer_pull(*user_mode_list, 4);
4815 silc_hash_table_list_reset(&htl);
4818 silc_buffer_push(buffer, buffer->data - buffer->head);
4819 if (user_mode_list && *user_mode_list)
4820 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4821 (*user_mode_list)->head));
4826 /* Finds client entry by Client ID and if it is not found then resolves
4827 it using WHOIS command. */
4829 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4830 SilcClientID *client_id,
4831 bool always_resolve,
4834 SilcClientEntry client;
4839 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4842 client = silc_idlist_find_client_by_id(server->global_list,
4843 client_id, TRUE, NULL);
4844 if (!client && server->server_type == SILC_ROUTER)
4848 if (!client && server->standalone)
4851 if (!client || !client->nickname || !client->username ||
4853 SilcBuffer buffer, idp;
4856 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4857 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4858 client->resolve_cmd_ident = ++server->cmd_ident;
4861 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4862 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4863 server->cmd_ident, 1,
4864 4, idp->data, idp->len);
4865 silc_server_packet_send(server, client ? client->router->connection :
4866 SILC_PRIMARY_ROUTE(server),
4867 SILC_PACKET_COMMAND, 0,
4868 buffer->data, buffer->len, FALSE);
4869 silc_buffer_free(idp);
4870 silc_buffer_free(buffer);
4881 /* A timeout callback for the re-key. We will be the initiator of the
4884 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4886 SilcSocketConnection sock = (SilcSocketConnection)context;
4887 SilcIDListData idata = (SilcIDListData)sock->user_data;
4888 SilcServer server = (SilcServer)idata->rekey->context;
4889 SilcProtocol protocol;
4890 SilcServerRekeyInternalContext *proto_ctx;
4892 /* Allocate internal protocol context. This is sent as context
4894 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4895 proto_ctx->server = (void *)server;
4896 proto_ctx->sock = sock;
4897 proto_ctx->responder = FALSE;
4898 proto_ctx->pfs = idata->rekey->pfs;
4900 /* Perform rekey protocol. Will call the final callback after the
4901 protocol is over. */
4902 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4903 &protocol, proto_ctx, silc_server_rekey_final);
4904 sock->protocol = protocol;
4906 /* Run the protocol */
4907 silc_protocol_execute(protocol, server->schedule, 0, 0);
4909 SILC_LOG_DEBUG(("Rekey protocol completed"));
4911 /* Re-register re-key timeout */
4912 silc_schedule_task_add(server->schedule, sock->sock,
4913 silc_server_rekey_callback,
4914 context, idata->rekey->timeout, 0,
4915 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4918 /* The final callback for the REKEY protocol. This will actually take the
4919 new key material into use. */
4921 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4923 SilcProtocol protocol = (SilcProtocol)context;
4924 SilcServerRekeyInternalContext *ctx =
4925 (SilcServerRekeyInternalContext *)protocol->context;
4926 SilcServer server = (SilcServer)ctx->server;
4927 SilcSocketConnection sock = ctx->sock;
4929 SILC_LOG_DEBUG(("Start"));
4931 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4932 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4933 /* Error occured during protocol */
4934 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4935 silc_protocol_cancel(protocol, server->schedule);
4936 silc_protocol_free(protocol);
4937 sock->protocol = NULL;
4939 silc_packet_context_free(ctx->packet);
4941 silc_ske_free(ctx->ske);
4946 /* Purge the outgoing data queue to assure that all rekey packets really
4947 go to the network before we quit the protocol. */
4948 silc_server_packet_queue_purge(server, sock);
4951 silc_protocol_free(protocol);
4952 sock->protocol = NULL;
4954 silc_packet_context_free(ctx->packet);
4956 silc_ske_free(ctx->ske);
4960 /* Task callback used to retrieve network statistical information from
4961 router server once in a while. */
4963 SILC_TASK_CALLBACK(silc_server_get_stats)
4965 SilcServer server = (SilcServer)context;
4966 SilcBuffer idp, packet;
4968 SILC_LOG_DEBUG(("Retrieving stats from router"));
4970 if (!server->standalone) {
4971 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4972 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4973 ++server->cmd_ident, 1,
4974 1, idp->data, idp->len);
4975 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4976 SILC_PACKET_COMMAND, 0, packet->data,
4977 packet->len, FALSE);
4978 silc_buffer_free(packet);
4979 silc_buffer_free(idp);
4982 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4983 server, 120, 0, SILC_TASK_TIMEOUT,