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 server->wait_backup = TRUE;
929 if (ptr->initiator) {
930 /* Check whether we are connected to this host already */
931 if (silc_server_num_sockets_by_remote(server,
932 silc_net_is_ip(ptr->host) ?
934 silc_net_is_ip(ptr->host) ?
935 NULL : ptr->host, ptr->port,
936 SILC_SOCKET_TYPE_ROUTER)) {
937 SILC_LOG_DEBUG(("We are already connected to this router"));
941 /* Allocate connection object for hold connection specific stuff. */
942 sconn = silc_calloc(1, sizeof(*sconn));
943 sconn->server = server;
944 sconn->remote_host = strdup(ptr->host);
945 sconn->remote_port = ptr->port;
946 sconn->backup = ptr->backup_router;
948 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
949 sconn->backup_replace_port = ptr->backup_replace_port;
952 if (!server->router_conn && !sconn->backup)
953 server->router_conn = sconn;
955 silc_schedule_task_add(server->schedule, 0,
956 silc_server_connect_router,
957 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
958 SILC_TASK_PRI_NORMAL);
963 /* Second part of connecting to router(s). Key exchange protocol has been
964 executed and now we will execute authentication protocol. */
966 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
968 SilcProtocol protocol = (SilcProtocol)context;
969 SilcServerKEInternalContext *ctx =
970 (SilcServerKEInternalContext *)protocol->context;
971 SilcServer server = (SilcServer)ctx->server;
972 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
973 SilcSocketConnection sock = ctx->sock;
974 SilcServerConnAuthInternalContext *proto_ctx;
975 SilcServerConfigRouter *conn = NULL;
977 SILC_LOG_DEBUG(("Start"));
979 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
980 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
981 /* Error occured during protocol */
982 silc_protocol_free(protocol);
983 sock->protocol = NULL;
984 silc_ske_free_key_material(ctx->keymat);
986 silc_packet_context_free(ctx->packet);
988 silc_ske_free(ctx->ske);
989 silc_free(ctx->dest_id);
991 silc_schedule_task_del_by_callback(server->schedule,
992 silc_server_failure_callback);
993 silc_server_disconnect_remote(server, sock,
994 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
996 /* Try reconnecting if configuration wants it */
997 if (!sconn->no_reconnect) {
998 silc_schedule_task_add(server->schedule, 0,
999 silc_server_connect_to_router_retry,
1000 sconn, 0, 1, SILC_TASK_TIMEOUT,
1001 SILC_TASK_PRI_NORMAL);
1005 /* Call completion to indicate error */
1006 if (sconn->callback)
1007 (*sconn->callback)(server, NULL, sconn->callback_context);
1009 silc_server_config_unref(&sconn->conn);
1010 silc_free(sconn->remote_host);
1011 silc_free(sconn->backup_replace_ip);
1016 /* We now have the key material as the result of the key exchange
1017 protocol. Take the key material into use. Free the raw key material
1018 as soon as we've set them into use. */
1019 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1020 ctx->sock, ctx->keymat,
1021 ctx->ske->prop->cipher,
1022 ctx->ske->prop->pkcs,
1023 ctx->ske->prop->hash,
1024 ctx->ske->prop->hmac,
1025 ctx->ske->prop->group,
1027 silc_protocol_free(protocol);
1028 sock->protocol = NULL;
1029 silc_ske_free_key_material(ctx->keymat);
1031 silc_packet_context_free(ctx->packet);
1033 silc_ske_free(ctx->ske);
1034 silc_free(ctx->dest_id);
1036 silc_schedule_task_del_by_callback(server->schedule,
1037 silc_server_failure_callback);
1038 silc_server_disconnect_remote(server, sock,
1039 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1041 /* Try reconnecting if configuration wants it */
1042 if (!sconn->no_reconnect) {
1043 silc_schedule_task_add(server->schedule, 0,
1044 silc_server_connect_to_router_retry,
1045 sconn, 0, 1, SILC_TASK_TIMEOUT,
1046 SILC_TASK_PRI_NORMAL);
1050 /* Call completion to indicate error */
1051 if (sconn->callback)
1052 (*sconn->callback)(server, NULL, sconn->callback_context);
1054 silc_server_config_unref(&sconn->conn);
1055 silc_free(sconn->remote_host);
1056 silc_free(sconn->backup_replace_ip);
1060 silc_ske_free_key_material(ctx->keymat);
1062 /* Allocate internal context for the authentication protocol. This
1063 is sent as context for the protocol. */
1064 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1065 proto_ctx->server = (void *)server;
1066 proto_ctx->context = (void *)sconn;
1067 proto_ctx->sock = sock;
1068 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1069 proto_ctx->dest_id_type = ctx->dest_id_type;
1070 proto_ctx->dest_id = ctx->dest_id;
1072 /* Resolve the authentication method used in this connection. Check if
1073 we find a match from user configured connections */
1074 if (!sconn->conn.ref_ptr)
1075 conn = silc_server_config_find_router_conn(server, sock->hostname,
1078 conn = sconn->conn.ref_ptr;
1081 /* Match found. Use the configured authentication method. Take only
1082 the passphrase, since for public key auth we automatically use
1083 our local key pair. */
1084 if (conn->passphrase) {
1085 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1086 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1088 proto_ctx->auth_data = strdup(conn->passphrase);
1089 proto_ctx->auth_data_len = strlen(conn->passphrase);
1090 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1092 } else if (conn->publickeys) {
1093 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1095 proto_ctx->auth_meth = SILC_AUTH_NONE;
1098 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1099 sock->hostname, sock->ip, sock->port));
1100 silc_protocol_free(protocol);
1101 sock->protocol = NULL;
1103 silc_packet_context_free(ctx->packet);
1105 silc_ske_free(ctx->ske);
1106 silc_free(ctx->dest_id);
1108 silc_server_config_unref(&sconn->conn);
1109 silc_free(sconn->remote_host);
1110 silc_free(sconn->backup_replace_ip);
1112 silc_schedule_task_del_by_callback(server->schedule,
1113 silc_server_failure_callback);
1114 silc_server_disconnect_remote(server, sock,
1115 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1119 /* Free old protocol as it is finished now */
1120 silc_protocol_free(protocol);
1122 silc_packet_context_free(ctx->packet);
1124 sock->protocol = NULL;
1126 /* Allocate the authentication protocol. This is allocated here
1127 but we won't start it yet. We will be receiving party of this
1128 protocol thus we will wait that connecting party will make
1129 their first move. */
1130 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1131 &sock->protocol, proto_ctx,
1132 silc_server_connect_to_router_final);
1134 /* Register timeout task. If the protocol is not executed inside
1135 this timelimit the connection will be terminated. */
1136 proto_ctx->timeout_task =
1137 silc_schedule_task_add(server->schedule, sock->sock,
1138 silc_server_timeout_remote,
1140 server->config->conn_auth_timeout, 0,
1144 /* Run the protocol */
1145 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1148 /* Finalizes the connection to router. Registers a server task to the
1149 queue so that we can accept new connections. */
1151 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1153 SilcProtocol protocol = (SilcProtocol)context;
1154 SilcServerConnAuthInternalContext *ctx =
1155 (SilcServerConnAuthInternalContext *)protocol->context;
1156 SilcServer server = (SilcServer)ctx->server;
1157 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1158 SilcSocketConnection sock = ctx->sock;
1159 SilcServerEntry id_entry = NULL;
1161 SilcServerHBContext hb_context;
1162 unsigned char *id_string;
1164 SilcIDListData idata;
1165 SilcServerConfigRouter *conn = NULL;
1166 SilcServerConfigConnParams *param = NULL;
1168 SILC_LOG_DEBUG(("Start"));
1170 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1171 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1172 /* Error occured during protocol */
1173 silc_free(ctx->dest_id);
1174 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1177 /* Try reconnecting if configuration wants it */
1178 if (!sconn->no_reconnect) {
1179 silc_schedule_task_add(server->schedule, 0,
1180 silc_server_connect_to_router_retry,
1181 sconn, 0, 1, SILC_TASK_TIMEOUT,
1182 SILC_TASK_PRI_NORMAL);
1189 /* Add a task to the queue. This task receives new connections to the
1190 server. This task remains on the queue until the end of the program. */
1191 if (!server->listenning && !sconn->backup) {
1192 silc_schedule_task_add(server->schedule, server->sock,
1193 silc_server_accept_new_connection,
1194 (void *)server, 0, 0,
1196 SILC_TASK_PRI_NORMAL);
1197 server->listenning = TRUE;
1200 /* Send NEW_SERVER packet to the router. We will become registered
1201 to the SILC network after sending this packet. */
1202 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1203 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1204 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1205 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1206 silc_buffer_format(packet,
1207 SILC_STR_UI_SHORT(id_len),
1208 SILC_STR_UI_XNSTRING(id_string, id_len),
1209 SILC_STR_UI_SHORT(strlen(server->server_name)),
1210 SILC_STR_UI_XNSTRING(server->server_name,
1211 strlen(server->server_name)),
1214 /* Send the packet */
1215 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1216 packet->data, packet->len, TRUE);
1217 silc_buffer_free(packet);
1218 silc_free(id_string);
1220 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1222 /* Check that we do not have this ID already */
1223 id_entry = silc_idlist_find_server_by_id(server->local_list,
1224 ctx->dest_id, TRUE, NULL);
1226 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1228 id_entry = silc_idlist_find_server_by_id(server->global_list,
1229 ctx->dest_id, TRUE, NULL);
1231 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1234 SILC_LOG_DEBUG(("New server id(%s)",
1235 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1237 /* Add the connected router to global server list. Router is sent
1238 as NULL since it's local to us. */
1239 id_entry = silc_idlist_add_server(server->global_list,
1240 strdup(sock->hostname),
1241 SILC_ROUTER, ctx->dest_id, NULL, sock);
1243 silc_free(ctx->dest_id);
1244 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1245 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1250 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1251 silc_free(sock->user_data);
1252 sock->user_data = (void *)id_entry;
1253 sock->type = SILC_SOCKET_TYPE_ROUTER;
1254 idata = (SilcIDListData)sock->user_data;
1255 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1256 SILC_IDLIST_STATUS_LOCAL);
1258 conn = sconn->conn.ref_ptr;
1259 param = &server->config->param;
1260 if (conn && conn->param)
1261 param = conn->param;
1263 /* Perform keepalive. The `hb_context' will be freed automatically
1264 when finally calling the silc_socket_free function. */
1265 hb_context = silc_calloc(1, sizeof(*hb_context));
1266 hb_context->server = server;
1267 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1268 silc_server_perform_heartbeat,
1271 /* Register re-key timeout */
1272 idata->rekey->timeout = param->key_exchange_rekey;
1273 idata->rekey->context = (void *)server;
1274 silc_schedule_task_add(server->schedule, sock->sock,
1275 silc_server_rekey_callback,
1276 (void *)sock, idata->rekey->timeout, 0,
1277 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1279 if (!sconn->backup) {
1280 /* Mark this router our primary router if we're still standalone */
1281 if (server->standalone) {
1282 server->id_entry->router = id_entry;
1283 server->router = id_entry;
1284 server->standalone = FALSE;
1286 /* If we are router then announce our possible servers. Backup
1287 router announces also global servers. */
1288 if (server->server_type == SILC_ROUTER)
1289 silc_server_announce_servers(server,
1290 server->backup_router ? TRUE : FALSE,
1291 0, SILC_PRIMARY_ROUTE(server));
1293 /* Announce our clients and channels to the router */
1294 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1295 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1297 /* If we are backup router then this primary router is whom we are
1299 if (server->server_type == SILC_BACKUP_ROUTER)
1300 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1303 /* Add this server to be our backup router */
1304 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1305 sconn->backup_replace_port, FALSE);
1308 sock->protocol = NULL;
1311 /* Call the completion callback to indicate that we've connected to
1313 if (sconn->callback)
1314 (*sconn->callback)(server, id_entry, sconn->callback_context);
1316 /* Free the temporary connection data context */
1318 silc_server_config_unref(&sconn->conn);
1319 silc_free(sconn->remote_host);
1320 silc_free(sconn->backup_replace_ip);
1323 if (sconn == server->router_conn)
1324 server->router_conn = NULL;
1327 /* Free the protocol object */
1328 if (sock->protocol == protocol)
1329 sock->protocol = NULL;
1330 silc_protocol_free(protocol);
1332 silc_packet_context_free(ctx->packet);
1334 silc_ske_free(ctx->ske);
1335 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1336 silc_free(ctx->auth_data);
1340 /* Host lookup callback that is called after the incoming connection's
1341 IP and FQDN lookup is performed. This will actually check the acceptance
1342 of the incoming connection and will register the key exchange protocol
1343 for this connection. */
1346 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1349 SilcServerKEInternalContext *proto_ctx =
1350 (SilcServerKEInternalContext *)context;
1351 SilcServer server = (SilcServer)proto_ctx->server;
1352 SilcServerConfigClient *cconfig = NULL;
1353 SilcServerConfigServer *sconfig = NULL;
1354 SilcServerConfigRouter *rconfig = NULL;
1355 SilcServerConfigDeny *deny;
1358 context = (void *)server;
1360 /* Check whether we could resolve both IP and FQDN. */
1361 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1362 server->config->require_reverse_lookup)) {
1363 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1364 sock->hostname ? sock->hostname :
1365 sock->ip ? sock->ip : ""));
1366 server->stat.conn_failures++;
1367 silc_server_disconnect_remote(server, sock,
1368 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1369 "Unknown host or IP");
1370 silc_free(proto_ctx);
1374 /* Register the connection for network input and output. This sets
1375 that scheduler will listen for incoming packets for this connection
1376 and sets that outgoing packets may be sent to this connection as well.
1377 However, this doesn't set the scheduler for outgoing traffic, it
1378 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1379 later when outgoing data is available. */
1380 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1382 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1385 /* Listenning port */
1386 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1387 silc_server_disconnect_remote(server, sock,
1388 SILC_STATUS_ERR_RESOURCE_LIMIT,
1389 "Connection refused");
1390 server->stat.conn_failures++;
1391 silc_free(proto_ctx);
1394 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1396 /* Check whether this connection is denied to connect to us. */
1397 deny = silc_server_config_find_denied(server, sock->ip);
1399 deny = silc_server_config_find_denied(server, sock->hostname);
1401 /* The connection is denied */
1402 SILC_LOG_INFO(("Connection %s (%s) is denied",
1403 sock->hostname, sock->ip));
1404 silc_server_disconnect_remote(server, sock,
1405 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1407 server->stat.conn_failures++;
1408 silc_free(proto_ctx);
1412 /* Check whether we have configured this sort of connection at all. We
1413 have to check all configurations since we don't know what type of
1414 connection this is. */
1415 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1416 cconfig = silc_server_config_find_client(server, sock->hostname);
1417 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1418 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1419 if (server->server_type == SILC_ROUTER) {
1420 if (!(rconfig = silc_server_config_find_router_conn(server,
1421 sock->ip, sock->port)))
1422 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1425 if (!cconfig && !sconfig && !rconfig) {
1426 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1428 silc_server_disconnect_remote(server, sock,
1429 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1430 server->stat.conn_failures++;
1431 silc_free(proto_ctx);
1435 /* The connection is allowed */
1437 /* Set internal context for key exchange protocol. This is
1438 sent as context for the protocol. */
1439 proto_ctx->sock = sock;
1440 proto_ctx->rng = server->rng;
1441 proto_ctx->responder = TRUE;
1442 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1443 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1444 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1446 /* Take flags for key exchange. Since we do not know what type of connection
1447 this is, we go through all found configurations and use the global ones
1448 as well. This will result always into strictest key exchange flags. */
1449 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1450 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1451 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1452 if (server->config->param.key_exchange_pfs)
1453 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1455 /* Prepare the connection for key exchange protocol. We allocate the
1456 protocol but will not start it yet. The connector will be the
1457 initiator of the protocol thus we will wait for initiation from
1458 there before we start the protocol. */
1459 server->stat.auth_attempts++;
1460 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1461 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1462 &sock->protocol, proto_ctx,
1463 silc_server_accept_new_connection_second);
1465 /* Register a timeout task that will be executed if the connector
1466 will not start the key exchange protocol within specified timeout
1467 and the connection will be closed. */
1468 proto_ctx->timeout_task =
1469 silc_schedule_task_add(server->schedule, sock->sock,
1470 silc_server_timeout_remote,
1472 server->config->key_exchange_timeout, 0,
1477 /* Accepts new connections to the server. Accepting new connections are
1478 done in three parts to make it async. */
1480 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1482 SilcServer server = (SilcServer)context;
1483 SilcSocketConnection newsocket;
1484 SilcServerKEInternalContext *proto_ctx;
1487 SILC_LOG_DEBUG(("Accepting new connection"));
1489 server->stat.conn_attempts++;
1491 sock = silc_net_accept_connection(fd);
1493 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1494 server->stat.conn_failures++;
1498 /* Check for maximum allowed connections */
1499 if (sock > server->config->param.connections_max) {
1500 SILC_LOG_ERROR(("Refusing connection, server is full"));
1501 server->stat.conn_failures++;
1502 silc_net_close_connection(sock);
1506 /* Set socket options */
1507 silc_net_set_socket_nonblock(sock);
1508 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1510 /* We don't create a ID yet, since we don't know what type of connection
1511 this is yet. But, we do add the connection to the socket table. */
1512 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1513 server->sockets[sock] = newsocket;
1515 /* Perform asynchronous host lookup. This will lookup the IP and the
1516 FQDN of the remote connection. After the lookup is done the connection
1517 is accepted further. */
1518 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1519 proto_ctx->server = server;
1520 proto_ctx->context = (void *)fd;
1521 silc_socket_host_lookup(newsocket, TRUE,
1522 silc_server_accept_new_connection_lookup,
1523 (void *)proto_ctx, server->schedule);
1526 /* Second part of accepting new connection. Key exchange protocol has been
1527 performed and now it is time to do little connection authentication
1528 protocol to figure out whether this connection is client or server
1529 and whether it has right to access this server (especially server
1530 connections needs to be authenticated). */
1532 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1534 SilcProtocol protocol = (SilcProtocol)context;
1535 SilcServerKEInternalContext *ctx =
1536 (SilcServerKEInternalContext *)protocol->context;
1537 SilcServer server = (SilcServer)ctx->server;
1538 SilcSocketConnection sock = ctx->sock;
1539 SilcServerConnAuthInternalContext *proto_ctx;
1541 SILC_LOG_DEBUG(("Start"));
1543 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1544 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1545 /* Error occured during protocol */
1546 SILC_LOG_DEBUG(("Error key exchange protocol"));
1547 silc_protocol_free(protocol);
1548 sock->protocol = NULL;
1549 silc_ske_free_key_material(ctx->keymat);
1551 silc_packet_context_free(ctx->packet);
1553 silc_ske_free(ctx->ske);
1554 silc_free(ctx->dest_id);
1555 silc_server_config_unref(&ctx->cconfig);
1556 silc_server_config_unref(&ctx->sconfig);
1557 silc_server_config_unref(&ctx->rconfig);
1559 silc_schedule_task_del_by_callback(server->schedule,
1560 silc_server_failure_callback);
1561 silc_server_disconnect_remote(server, sock,
1562 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1564 server->stat.auth_failures++;
1568 /* We now have the key material as the result of the key exchange
1569 protocol. Take the key material into use. Free the raw key material
1570 as soon as we've set them into use. */
1571 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1572 ctx->sock, ctx->keymat,
1573 ctx->ske->prop->cipher,
1574 ctx->ske->prop->pkcs,
1575 ctx->ske->prop->hash,
1576 ctx->ske->prop->hmac,
1577 ctx->ske->prop->group,
1579 SILC_LOG_ERROR(("Error setting key material in use"));
1580 silc_protocol_free(protocol);
1581 sock->protocol = NULL;
1582 silc_ske_free_key_material(ctx->keymat);
1584 silc_packet_context_free(ctx->packet);
1586 silc_ske_free(ctx->ske);
1587 silc_free(ctx->dest_id);
1588 silc_server_config_unref(&ctx->cconfig);
1589 silc_server_config_unref(&ctx->sconfig);
1590 silc_server_config_unref(&ctx->rconfig);
1592 silc_schedule_task_del_by_callback(server->schedule,
1593 silc_server_failure_callback);
1594 silc_server_disconnect_remote(server, sock,
1595 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1596 server->stat.auth_failures++;
1599 silc_ske_free_key_material(ctx->keymat);
1601 /* Allocate internal context for the authentication protocol. This
1602 is sent as context for the protocol. */
1603 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1604 proto_ctx->server = (void *)server;
1605 proto_ctx->sock = sock;
1606 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1607 proto_ctx->responder = TRUE;
1608 proto_ctx->dest_id_type = ctx->dest_id_type;
1609 proto_ctx->dest_id = ctx->dest_id;
1610 proto_ctx->cconfig = ctx->cconfig;
1611 proto_ctx->sconfig = ctx->sconfig;
1612 proto_ctx->rconfig = ctx->rconfig;
1614 /* Free old protocol as it is finished now */
1615 silc_protocol_free(protocol);
1617 silc_packet_context_free(ctx->packet);
1619 sock->protocol = NULL;
1621 /* Allocate the authentication protocol. This is allocated here
1622 but we won't start it yet. We will be receiving party of this
1623 protocol thus we will wait that connecting party will make
1624 their first move. */
1625 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1626 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1627 &sock->protocol, proto_ctx,
1628 silc_server_accept_new_connection_final);
1630 /* Register timeout task. If the protocol is not executed inside
1631 this timelimit the connection will be terminated. */
1632 proto_ctx->timeout_task =
1633 silc_schedule_task_add(server->schedule, sock->sock,
1634 silc_server_timeout_remote,
1636 server->config->conn_auth_timeout, 0,
1641 /* After this is called, server don't wait for backup router anymore.
1642 This gets called automatically even after we have backup router
1643 connection established. */
1645 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1647 SilcServer server = context;
1648 server->wait_backup = FALSE;
1651 /* Final part of accepting new connection. The connection has now
1652 been authenticated and keys has been exchanged. We also know whether
1653 this is client or server connection. */
1655 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1657 SilcProtocol protocol = (SilcProtocol)context;
1658 SilcServerConnAuthInternalContext *ctx =
1659 (SilcServerConnAuthInternalContext *)protocol->context;
1660 SilcServer server = (SilcServer)ctx->server;
1661 SilcSocketConnection sock = ctx->sock;
1662 SilcServerHBContext hb_context;
1663 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1665 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1667 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1668 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1669 /* Error occured during protocol */
1670 SILC_LOG_DEBUG(("Error during authentication protocol"));
1671 silc_protocol_free(protocol);
1672 sock->protocol = NULL;
1674 silc_packet_context_free(ctx->packet);
1676 silc_ske_free(ctx->ske);
1677 silc_free(ctx->dest_id);
1678 silc_server_config_unref(&ctx->cconfig);
1679 silc_server_config_unref(&ctx->sconfig);
1680 silc_server_config_unref(&ctx->rconfig);
1682 silc_schedule_task_del_by_callback(server->schedule,
1683 silc_server_failure_callback);
1684 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1686 server->stat.auth_failures++;
1690 entry->data.last_receive = time(NULL);
1692 switch (ctx->conn_type) {
1693 case SILC_SOCKET_TYPE_CLIENT:
1695 SilcClientEntry client;
1696 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1698 /* Verify whether this connection is after all allowed to connect */
1699 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1700 &server->config->param,
1701 conn->param, ctx->ske)) {
1702 server->stat.auth_failures++;
1706 /* If we are primary router and we have backup router configured
1707 but it has not connected to use yet, do not accept any other
1709 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1710 !server->backup_router) {
1711 SilcServerConfigRouter *router;
1712 router = silc_server_config_get_backup_router(server);
1713 if (router && strcmp(server->config->server_info->primary->server_ip,
1715 silc_server_find_socket_by_host(server,
1716 SILC_SOCKET_TYPE_SERVER,
1717 router->backup_replace_ip, 0)) {
1718 SILC_LOG_INFO(("Will not accept connections because we do "
1719 "not have backup router connection established"));
1720 silc_server_disconnect_remote(server, sock,
1721 SILC_STATUS_ERR_PERM_DENIED,
1722 "We do not have connection to backup "
1723 "router established, try later");
1724 silc_free(sock->user_data);
1725 server->stat.auth_failures++;
1727 /* From here on, wait 10 seconds for the backup router to appear. */
1728 silc_schedule_task_add(server->schedule, 0,
1729 silc_server_backup_router_wait,
1730 (void *)server, 10, 0,
1731 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1736 SILC_LOG_DEBUG(("Remote host is client"));
1737 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1740 /* Add the client to the client ID cache. The nickname and Client ID
1741 and other information is created after we have received NEW_CLIENT
1742 packet from client. */
1743 client = silc_idlist_add_client(server->local_list,
1744 NULL, NULL, NULL, NULL, NULL, sock, 0);
1746 SILC_LOG_ERROR(("Could not add new client to cache"));
1747 silc_free(sock->user_data);
1748 silc_server_disconnect_remote(server, sock,
1749 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1750 server->stat.auth_failures++;
1753 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1756 server->stat.my_clients++;
1757 server->stat.clients++;
1758 server->stat.cell_clients++;
1760 /* Get connection parameters */
1762 if (conn->param->keepalive_secs)
1763 hearbeat_timeout = conn->param->keepalive_secs;
1766 id_entry = (void *)client;
1769 case SILC_SOCKET_TYPE_SERVER:
1770 case SILC_SOCKET_TYPE_ROUTER:
1772 SilcServerEntry new_server;
1773 bool initiator = FALSE;
1774 bool backup_local = FALSE;
1775 bool backup_router = FALSE;
1776 char *backup_replace_ip = NULL;
1777 SilcUInt16 backup_replace_port = 0;
1778 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1779 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1781 /* If we are backup router and this is incoming server connection
1782 and we do not have connection to primary router, do not allow
1784 if (server->server_type == SILC_BACKUP_ROUTER &&
1785 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1786 !SILC_PRIMARY_ROUTE(server)) {
1787 SILC_LOG_INFO(("Will not accept server connection because we do "
1788 "not have primary router connection established"));
1789 silc_server_disconnect_remote(server, sock,
1790 SILC_STATUS_ERR_PERM_DENIED,
1791 "We do not have connection to primary "
1792 "router established, try later");
1793 silc_free(sock->user_data);
1794 server->stat.auth_failures++;
1798 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1799 /* Verify whether this connection is after all allowed to connect */
1800 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1801 &server->config->param,
1802 rconn ? rconn->param : NULL,
1804 silc_free(sock->user_data);
1805 server->stat.auth_failures++;
1811 if (rconn->param->keepalive_secs)
1812 hearbeat_timeout = rconn->param->keepalive_secs;
1815 initiator = rconn->initiator;
1816 backup_local = rconn->backup_local;
1817 backup_router = rconn->backup_router;
1818 backup_replace_ip = rconn->backup_replace_ip;
1819 backup_replace_port = rconn->backup_replace_port;
1823 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1824 /* Verify whether this connection is after all allowed to connect */
1825 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1826 &server->config->param,
1827 sconn ? sconn->param : NULL,
1829 silc_free(sock->user_data);
1830 server->stat.auth_failures++;
1835 if (sconn->param->keepalive_secs)
1836 hearbeat_timeout = sconn->param->keepalive_secs;
1839 backup_router = sconn->backup_router;
1843 /* If we are primary router and we have backup router configured
1844 but it has not connected to use yet, do not accept any other
1846 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1847 !server->backup_router && !backup_router) {
1848 SilcServerConfigRouter *router;
1849 router = silc_server_config_get_backup_router(server);
1850 if (router && strcmp(server->config->server_info->primary->server_ip,
1852 silc_server_find_socket_by_host(server,
1853 SILC_SOCKET_TYPE_SERVER,
1854 router->backup_replace_ip, 0)) {
1855 SILC_LOG_INFO(("Will not accept connections because we do "
1856 "not have backup router connection established"));
1857 silc_server_disconnect_remote(server, sock,
1858 SILC_STATUS_ERR_PERM_DENIED,
1859 "We do not have connection to backup "
1860 "router established, try later");
1861 silc_free(sock->user_data);
1862 server->stat.auth_failures++;
1864 /* From here on, wait 10 seconds for the backup router to appear. */
1865 silc_schedule_task_add(server->schedule, 0,
1866 silc_server_backup_router_wait,
1867 (void *)server, 10, 0,
1868 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1873 SILC_LOG_DEBUG(("Remote host is %s",
1874 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1875 "server" : (backup_router ?
1876 "backup router" : "router")));
1877 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1878 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1879 "server" : (backup_router ?
1880 "backup router" : "router")));
1882 /* Add the server into server cache. The server name and Server ID
1883 is updated after we have received NEW_SERVER packet from the
1884 server. We mark ourselves as router for this server if we really
1887 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1888 server->local_list : (backup_router ?
1889 server->local_list :
1890 server->global_list)),
1892 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1893 SILC_SERVER : SILC_ROUTER),
1895 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1896 server->id_entry : (backup_router ?
1897 server->id_entry : NULL)),
1900 SILC_LOG_ERROR(("Could not add new server to cache"));
1901 silc_free(sock->user_data);
1902 silc_server_disconnect_remote(server, sock,
1903 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1904 server->stat.auth_failures++;
1907 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1909 id_entry = (void *)new_server;
1911 /* If the incoming connection is router and marked as backup router
1912 then add it to be one of our backups */
1913 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1914 /* Change it back to SERVER type since that's what it really is. */
1916 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1917 new_server->server_type = SILC_BACKUP_ROUTER;
1921 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1922 server->stat.my_servers++;
1924 server->stat.my_routers++;
1925 server->stat.routers++;
1927 server->stat.servers++;
1929 /* Check whether this connection is to be our primary router connection
1930 if we do not already have the primary route. */
1931 if (!backup_router &&
1932 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1933 if (silc_server_config_is_primary_route(server) && !initiator)
1936 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1937 server->standalone = FALSE;
1938 if (!server->id_entry->router) {
1939 server->id_entry->router = id_entry;
1940 server->router = id_entry;
1951 sock->type = ctx->conn_type;
1953 /* Add the common data structure to the ID entry. */
1954 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1956 /* Add to sockets internal pointer for fast referencing */
1957 silc_free(sock->user_data);
1958 sock->user_data = id_entry;
1960 /* Connection has been fully established now. Everything is ok. */
1961 SILC_LOG_DEBUG(("New connection authenticated"));
1963 /* Perform keepalive. The `hb_context' will be freed automatically
1964 when finally calling the silc_socket_free function. */
1965 hb_context = silc_calloc(1, sizeof(*hb_context));
1966 hb_context->server = server;
1967 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1968 silc_server_perform_heartbeat,
1972 silc_schedule_task_del_by_callback(server->schedule,
1973 silc_server_failure_callback);
1974 silc_protocol_free(protocol);
1976 silc_packet_context_free(ctx->packet);
1978 silc_ske_free(ctx->ske);
1979 silc_free(ctx->dest_id);
1980 silc_server_config_unref(&ctx->cconfig);
1981 silc_server_config_unref(&ctx->sconfig);
1982 silc_server_config_unref(&ctx->rconfig);
1984 sock->protocol = NULL;
1987 /* This function is used to read packets from network and send packets to
1988 network. This is usually a generic task. */
1990 SILC_TASK_CALLBACK(silc_server_packet_process)
1992 SilcServer server = (SilcServer)context;
1993 SilcSocketConnection sock = server->sockets[fd];
1994 SilcIDListData idata;
1995 SilcCipher cipher = NULL;
1996 SilcHmac hmac = NULL;
1997 SilcUInt32 sequence = 0;
2001 SILC_LOG_DEBUG(("Unknown socket connection"));
2005 /* Packet sending */
2007 if (type == SILC_TASK_WRITE) {
2008 /* Do not send data to disconnected connection */
2009 if (SILC_IS_DISCONNECTED(sock)) {
2010 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2014 server->stat.packets_sent++;
2016 /* Send the packet */
2017 ret = silc_packet_send(sock, TRUE);
2019 /* If returned -2 could not write to connection now, will do
2025 SILC_LOG_ERROR(("Error sending packet to connection "
2026 "%s:%d [%s]", sock->hostname, sock->port,
2027 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2028 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2029 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2034 /* The packet has been sent and now it is time to set the connection
2035 back to only for input. When there is again some outgoing data
2036 available for this connection it will be set for output as well.
2037 This call clears the output setting and sets it only for input. */
2038 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2039 SILC_UNSET_OUTBUF_PENDING(sock);
2041 silc_buffer_clear(sock->outbuf);
2045 /* Packet receiving */
2047 /* Read some data from connection */
2048 ret = silc_packet_receive(sock);
2052 SILC_LOG_ERROR(("Error receiving packet from connection "
2053 "%s:%d [%s] %s", sock->hostname, sock->port,
2054 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2055 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2056 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2057 "Router"), strerror(errno)));
2063 SILC_LOG_DEBUG(("Read EOF"));
2065 /* If connection is disconnecting already we will finally
2066 close the connection */
2067 if (SILC_IS_DISCONNECTING(sock)) {
2068 if (sock->user_data)
2069 silc_server_free_sock_user_data(server, sock, NULL);
2070 silc_server_close_connection(server, sock);
2074 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2075 SILC_SET_DISCONNECTING(sock);
2077 if (sock->user_data) {
2079 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2080 silc_server_free_sock_user_data(server, sock, tmp);
2082 silc_server_free_sock_user_data(server, sock, NULL);
2083 } else if (server->router_conn && server->router_conn->sock == sock &&
2084 !server->router && server->standalone)
2085 silc_schedule_task_add(server->schedule, 0,
2086 silc_server_connect_to_router,
2089 SILC_TASK_PRI_NORMAL);
2091 silc_server_close_connection(server, sock);
2095 /* If connection is disconnecting or disconnected we will ignore
2097 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2098 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2102 /* Get keys and stuff from ID entry */
2103 idata = (SilcIDListData)sock->user_data;
2105 cipher = idata->receive_key;
2106 hmac = idata->hmac_receive;
2107 sequence = idata->psn_receive;
2110 /* Process the packet. This will call the parser that will then
2111 decrypt and parse the packet. */
2112 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2113 TRUE : FALSE, cipher, hmac, sequence,
2114 silc_server_packet_parse, server);
2116 /* If this socket connection is not authenticated yet and the packet
2117 processing failed we will drop the connection since it can be
2118 a malicious flooder. */
2119 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2120 (!sock->protocol || sock->protocol->protocol->type ==
2121 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2122 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2123 SILC_SET_DISCONNECTING(sock);
2125 if (sock->user_data)
2126 silc_server_free_sock_user_data(server, sock, NULL);
2127 silc_server_close_connection(server, sock);
2131 /* Parses whole packet, received earlier. */
2133 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2135 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2136 SilcServer server = (SilcServer)parse_ctx->context;
2137 SilcSocketConnection sock = parse_ctx->sock;
2138 SilcPacketContext *packet = parse_ctx->packet;
2139 SilcIDListData idata = (SilcIDListData)sock->user_data;
2142 server->stat.packets_received++;
2144 /* Parse the packet */
2145 if (parse_ctx->normal)
2146 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2148 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2150 /* If entry is disabled ignore what we got. */
2151 if (ret != SILC_PACKET_RESUME_ROUTER &&
2152 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2153 SILC_LOG_DEBUG(("Connection is disabled"));
2157 if (ret == SILC_PACKET_NONE) {
2158 SILC_LOG_DEBUG(("Error parsing packet"));
2162 /* Check that the the current client ID is same as in the client's packet. */
2163 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2164 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2165 if (client && client->id && packet->src_id) {
2166 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2167 packet->src_id_type);
2168 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2170 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2177 if (server->server_type == SILC_ROUTER) {
2178 /* Route the packet if it is not destined to us. Other ID types but
2179 server are handled separately after processing them. */
2180 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2181 packet->dst_id_type == SILC_ID_SERVER &&
2182 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2183 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2185 /* Route the packet to fastest route for the destination ID */
2186 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2187 packet->dst_id_type);
2190 silc_server_packet_route(server,
2191 silc_server_route_get(server, id,
2192 packet->dst_id_type),
2199 /* Parse the incoming packet type */
2200 silc_server_packet_parse_type(server, sock, packet);
2202 /* Broadcast packet if it is marked as broadcast packet and it is
2203 originated from router and we are router. */
2204 if (server->server_type == SILC_ROUTER &&
2205 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2206 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2207 /* Broadcast to our primary route */
2208 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2210 /* If we have backup routers then we need to feed all broadcast
2211 data to those servers. */
2212 silc_server_backup_broadcast(server, sock, packet);
2216 silc_packet_context_free(packet);
2217 silc_free(parse_ctx);
2220 /* Parser callback called by silc_packet_receive_process. This merely
2221 registers timeout that will handle the actual parsing when appropriate. */
2223 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2226 SilcServer server = (SilcServer)context;
2227 SilcSocketConnection sock = parser_context->sock;
2228 SilcIDListData idata = (SilcIDListData)sock->user_data;
2231 idata->psn_receive = parser_context->packet->sequence + 1;
2233 /* If protocol for this connection is key exchange or rekey then we'll
2234 process all packets synchronously, since there might be packets in
2235 queue that we are not able to decrypt without first processing the
2236 packets before them. */
2237 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2238 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2239 (sock->protocol && sock->protocol->protocol &&
2240 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2241 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2242 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2245 /* Reprocess data since we'll return FALSE here. This is because
2246 the idata->receive_key might have become valid in the last packet
2247 and we want to call this processor with valid cipher. */
2249 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2250 TRUE : FALSE, idata->receive_key,
2251 idata->hmac_receive, idata->psn_receive,
2252 silc_server_packet_parse, server);
2254 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2255 TRUE : FALSE, NULL, NULL, 0,
2256 silc_server_packet_parse, server);
2260 switch (sock->type) {
2261 case SILC_SOCKET_TYPE_UNKNOWN:
2262 case SILC_SOCKET_TYPE_CLIENT:
2263 /* Parse the packet with timeout */
2264 silc_schedule_task_add(server->schedule, sock->sock,
2265 silc_server_packet_parse_real,
2266 (void *)parser_context, 0, 100000,
2268 SILC_TASK_PRI_NORMAL);
2270 case SILC_SOCKET_TYPE_SERVER:
2271 case SILC_SOCKET_TYPE_ROUTER:
2272 /* Packets from servers are parsed immediately */
2273 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2283 /* Parses the packet type and calls what ever routines the packet type
2284 requires. This is done for all incoming packets. */
2286 void silc_server_packet_parse_type(SilcServer server,
2287 SilcSocketConnection sock,
2288 SilcPacketContext *packet)
2290 SilcPacketType type = packet->type;
2291 SilcIDListData idata = (SilcIDListData)sock->user_data;
2293 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2294 silc_get_packet_name(type), packet->flags));
2296 /* Parse the packet type */
2298 case SILC_PACKET_DISCONNECT:
2301 char *message = NULL;
2303 if (packet->flags & SILC_PACKET_FLAG_LIST)
2305 if (packet->buffer->len < 1)
2308 status = (SilcStatus)packet->buffer->data[0];
2309 if (packet->buffer->len > 1 &&
2310 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2311 message = silc_memdup(packet->buffer->data + 1,
2312 packet->buffer->len - 1);
2314 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2315 sock->ip, sock->hostname,
2316 silc_get_status_message(status), status,
2317 message ? message : ""));
2320 /* Handle the disconnection from our end too */
2321 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2322 silc_server_free_sock_user_data(server, sock, NULL);
2323 silc_server_close_connection(server, sock);
2327 case SILC_PACKET_SUCCESS:
2329 * Success received for something. For now we can have only
2330 * one protocol for connection executing at once hence this
2331 * success message is for whatever protocol is executing currently.
2333 if (packet->flags & SILC_PACKET_FLAG_LIST)
2336 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2339 case SILC_PACKET_FAILURE:
2341 * Failure received for something. For now we can have only
2342 * one protocol for connection executing at once hence this
2343 * failure message is for whatever protocol is executing currently.
2345 if (packet->flags & SILC_PACKET_FLAG_LIST)
2347 if (sock->protocol) {
2348 SilcServerFailureContext f;
2349 f = silc_calloc(1, sizeof(*f));
2353 /* We will wait 5 seconds to process this failure packet */
2354 silc_schedule_task_add(server->schedule, sock->sock,
2355 silc_server_failure_callback, (void *)f, 5, 0,
2356 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2360 case SILC_PACKET_REJECT:
2361 if (packet->flags & SILC_PACKET_FLAG_LIST)
2366 case SILC_PACKET_NOTIFY:
2368 * Received notify packet. Server can receive notify packets from
2369 * router. Server then relays the notify messages to clients if needed.
2371 if (packet->flags & SILC_PACKET_FLAG_LIST)
2372 silc_server_notify_list(server, sock, packet);
2374 silc_server_notify(server, sock, packet);
2380 case SILC_PACKET_CHANNEL_MESSAGE:
2382 * Received channel message. Channel messages are special packets
2383 * (although probably most common ones) thus they are handled
2386 if (packet->flags & SILC_PACKET_FLAG_LIST)
2388 idata->last_receive = time(NULL);
2389 silc_server_channel_message(server, sock, packet);
2392 case SILC_PACKET_CHANNEL_KEY:
2394 * Received key for channel. As channels are created by the router
2395 * the keys are as well. We will distribute the key to all of our
2396 * locally connected clients on the particular channel. Router
2397 * never receives this channel and thus is ignored.
2399 if (packet->flags & SILC_PACKET_FLAG_LIST)
2401 silc_server_channel_key(server, sock, packet);
2407 case SILC_PACKET_COMMAND:
2409 * Recived command. Processes the command request and allocates the
2410 * command context and calls the command.
2412 if (packet->flags & SILC_PACKET_FLAG_LIST)
2414 silc_server_command_process(server, sock, packet);
2417 case SILC_PACKET_COMMAND_REPLY:
2419 * Received command reply packet. Received command reply to command. It
2420 * may be reply to command sent by us or reply to command sent by client
2421 * that we've routed further.
2423 if (packet->flags & SILC_PACKET_FLAG_LIST)
2425 silc_server_command_reply(server, sock, packet);
2429 * Private Message packets
2431 case SILC_PACKET_PRIVATE_MESSAGE:
2433 * Received private message packet. The packet is coming from either
2436 if (packet->flags & SILC_PACKET_FLAG_LIST)
2438 idata->last_receive = time(NULL);
2439 silc_server_private_message(server, sock, packet);
2442 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2444 * Private message key packet.
2446 if (packet->flags & SILC_PACKET_FLAG_LIST)
2448 silc_server_private_message_key(server, sock, packet);
2452 * Key Exchange protocol packets
2454 case SILC_PACKET_KEY_EXCHANGE:
2455 if (packet->flags & SILC_PACKET_FLAG_LIST)
2458 if (sock->protocol && sock->protocol->protocol &&
2459 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2460 SilcServerKEInternalContext *proto_ctx =
2461 (SilcServerKEInternalContext *)sock->protocol->context;
2463 proto_ctx->packet = silc_packet_context_dup(packet);
2465 /* Let the protocol handle the packet */
2466 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2468 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2469 "protocol active, packet dropped."));
2473 case SILC_PACKET_KEY_EXCHANGE_1:
2474 if (packet->flags & SILC_PACKET_FLAG_LIST)
2477 if (sock->protocol && sock->protocol->protocol &&
2478 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2479 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2481 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2482 SilcServerRekeyInternalContext *proto_ctx =
2483 (SilcServerRekeyInternalContext *)sock->protocol->context;
2485 if (proto_ctx->packet)
2486 silc_packet_context_free(proto_ctx->packet);
2488 proto_ctx->packet = silc_packet_context_dup(packet);
2490 /* Let the protocol handle the packet */
2491 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2493 SilcServerKEInternalContext *proto_ctx =
2494 (SilcServerKEInternalContext *)sock->protocol->context;
2496 if (proto_ctx->packet)
2497 silc_packet_context_free(proto_ctx->packet);
2499 proto_ctx->packet = silc_packet_context_dup(packet);
2500 proto_ctx->dest_id_type = packet->src_id_type;
2501 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2502 packet->src_id_type);
2503 if (!proto_ctx->dest_id)
2506 /* Let the protocol handle the packet */
2507 silc_protocol_execute(sock->protocol, server->schedule,
2511 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2512 "protocol active, packet dropped."));
2516 case SILC_PACKET_KEY_EXCHANGE_2:
2517 if (packet->flags & SILC_PACKET_FLAG_LIST)
2520 if (sock->protocol && sock->protocol->protocol &&
2521 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2522 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2524 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2525 SilcServerRekeyInternalContext *proto_ctx =
2526 (SilcServerRekeyInternalContext *)sock->protocol->context;
2528 if (proto_ctx->packet)
2529 silc_packet_context_free(proto_ctx->packet);
2531 proto_ctx->packet = silc_packet_context_dup(packet);
2533 /* Let the protocol handle the packet */
2534 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2536 SilcServerKEInternalContext *proto_ctx =
2537 (SilcServerKEInternalContext *)sock->protocol->context;
2539 if (proto_ctx->packet)
2540 silc_packet_context_free(proto_ctx->packet);
2542 proto_ctx->packet = silc_packet_context_dup(packet);
2543 proto_ctx->dest_id_type = packet->src_id_type;
2544 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2545 packet->src_id_type);
2546 if (!proto_ctx->dest_id)
2549 /* Let the protocol handle the packet */
2550 silc_protocol_execute(sock->protocol, server->schedule,
2554 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2555 "protocol active, packet dropped."));
2559 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2561 * Connection authentication request packet. When we receive this packet
2562 * we will send to the other end information about our mandatory
2563 * authentication method for the connection. This packet maybe received
2566 if (packet->flags & SILC_PACKET_FLAG_LIST)
2568 silc_server_connection_auth_request(server, sock, packet);
2572 * Connection Authentication protocol packets
2574 case SILC_PACKET_CONNECTION_AUTH:
2575 /* Start of the authentication protocol. We receive here the
2576 authentication data and will verify it. */
2577 if (packet->flags & SILC_PACKET_FLAG_LIST)
2580 if (sock->protocol && sock->protocol->protocol->type
2581 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2583 SilcServerConnAuthInternalContext *proto_ctx =
2584 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2586 proto_ctx->packet = silc_packet_context_dup(packet);
2588 /* Let the protocol handle the packet */
2589 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2591 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2592 "protocol active, packet dropped."));
2596 case SILC_PACKET_NEW_ID:
2598 * Received New ID packet. This includes some new ID that has been
2599 * created. It may be for client, server or channel. This is the way
2600 * to distribute information about new registered entities in the
2603 if (packet->flags & SILC_PACKET_FLAG_LIST)
2604 silc_server_new_id_list(server, sock, packet);
2606 silc_server_new_id(server, sock, packet);
2609 case SILC_PACKET_NEW_CLIENT:
2611 * Received new client packet. This includes client information that
2612 * we will use to create initial client ID. After creating new
2613 * ID we will send it to the client.
2615 if (packet->flags & SILC_PACKET_FLAG_LIST)
2617 silc_server_new_client(server, sock, packet);
2620 case SILC_PACKET_NEW_SERVER:
2622 * Received new server packet. This includes Server ID and some other
2623 * information that we may save. This is received after server has
2626 if (packet->flags & SILC_PACKET_FLAG_LIST)
2628 silc_server_new_server(server, sock, packet);
2631 case SILC_PACKET_NEW_CHANNEL:
2633 * Received new channel packet. Information about new channel in the
2634 * network are distributed using this packet.
2636 if (packet->flags & SILC_PACKET_FLAG_LIST)
2637 silc_server_new_channel_list(server, sock, packet);
2639 silc_server_new_channel(server, sock, packet);
2642 case SILC_PACKET_HEARTBEAT:
2644 * Received heartbeat.
2646 if (packet->flags & SILC_PACKET_FLAG_LIST)
2650 case SILC_PACKET_KEY_AGREEMENT:
2652 * Received heartbeat.
2654 if (packet->flags & SILC_PACKET_FLAG_LIST)
2656 silc_server_key_agreement(server, sock, packet);
2659 case SILC_PACKET_REKEY:
2661 * Received re-key packet. The sender wants to regenerate the session
2664 if (packet->flags & SILC_PACKET_FLAG_LIST)
2666 silc_server_rekey(server, sock, packet);
2669 case SILC_PACKET_REKEY_DONE:
2671 * The re-key is done.
2673 if (packet->flags & SILC_PACKET_FLAG_LIST)
2676 if (sock->protocol && sock->protocol->protocol &&
2677 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2679 SilcServerRekeyInternalContext *proto_ctx =
2680 (SilcServerRekeyInternalContext *)sock->protocol->context;
2682 if (proto_ctx->packet)
2683 silc_packet_context_free(proto_ctx->packet);
2685 proto_ctx->packet = silc_packet_context_dup(packet);
2687 /* Let the protocol handle the packet */
2688 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2690 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2691 "protocol active, packet dropped."));
2695 case SILC_PACKET_FTP:
2697 if (packet->flags & SILC_PACKET_FLAG_LIST)
2699 silc_server_ftp(server, sock, packet);
2702 case SILC_PACKET_RESUME_CLIENT:
2704 if (packet->flags & SILC_PACKET_FLAG_LIST)
2706 silc_server_resume_client(server, sock, packet);
2709 case SILC_PACKET_RESUME_ROUTER:
2710 /* Resume router packet received. This packet is received for backup
2711 router resuming protocol. */
2712 if (packet->flags & SILC_PACKET_FLAG_LIST)
2714 silc_server_backup_resume_router(server, sock, packet);
2718 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2723 /* Creates connection to a remote router. */
2725 void silc_server_create_connection(SilcServer server,
2726 const char *remote_host, SilcUInt32 port)
2728 SilcServerConnection sconn;
2730 /* Allocate connection object for hold connection specific stuff. */
2731 sconn = silc_calloc(1, sizeof(*sconn));
2732 sconn->server = server;
2733 sconn->remote_host = strdup(remote_host);
2734 sconn->remote_port = port;
2735 sconn->no_reconnect = TRUE;
2737 silc_schedule_task_add(server->schedule, 0,
2738 silc_server_connect_router,
2739 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2740 SILC_TASK_PRI_NORMAL);
2743 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2745 silc_socket_free(context);
2748 /* Closes connection to socket connection */
2750 void silc_server_close_connection(SilcServer server,
2751 SilcSocketConnection sock)
2753 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2754 silc_schedule_task_add(server->schedule, 0,
2755 silc_server_close_connection_final,
2756 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2757 SILC_TASK_PRI_NORMAL);
2761 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2763 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2764 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2765 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2768 /* We won't listen for this connection anymore */
2769 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2771 /* Unregister all tasks */
2772 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2774 /* Close the actual connection */
2775 silc_net_close_connection(sock->sock);
2776 server->sockets[sock->sock] = NULL;
2778 /* If sock->user_data is NULL then we'll check for active protocols
2779 here since the silc_server_free_sock_user_data has not been called
2780 for this connection. */
2781 if (!sock->user_data) {
2782 /* If any protocol is active cancel its execution. It will call
2783 the final callback which will finalize the disconnection. */
2784 if (sock->protocol) {
2785 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2786 silc_protocol_cancel(sock->protocol, server->schedule);
2787 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2788 silc_protocol_execute_final(sock->protocol, server->schedule);
2789 sock->protocol = NULL;
2794 silc_schedule_task_add(server->schedule, 0,
2795 silc_server_close_connection_final,
2796 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2797 SILC_TASK_PRI_NORMAL);
2800 /* Sends disconnect message to remote connection and disconnects the
2803 void silc_server_disconnect_remote(SilcServer server,
2804 SilcSocketConnection sock,
2805 SilcStatus status, ...)
2808 unsigned char buf[512];
2816 memset(buf, 0, sizeof(buf));
2817 va_start(ap, status);
2818 cp = va_arg(ap, char *);
2820 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2825 SILC_LOG_DEBUG(("Disconnecting remote host"));
2827 /* Notify remote end that the conversation is over. The notify message
2828 is tried to be sent immediately. */
2832 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2834 buffer = silc_buffer_alloc_size(len);
2838 buffer->data[0] = status;
2840 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2842 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2843 buffer->data, buffer->len, TRUE);
2844 silc_buffer_free(buffer);
2847 silc_server_packet_queue_purge(server, sock);
2849 /* Mark the connection to be disconnected */
2850 SILC_SET_DISCONNECTED(sock);
2851 silc_server_close_connection(server, sock);
2856 SilcClientEntry client;
2857 } *FreeClientInternal;
2859 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2861 FreeClientInternal i = (FreeClientInternal)context;
2863 silc_idlist_del_data(i->client);
2864 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2868 /* Frees client data and notifies about client's signoff. */
2870 void silc_server_free_client_data(SilcServer server,
2871 SilcSocketConnection sock,
2872 SilcClientEntry client,
2874 const char *signoff)
2876 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2878 SILC_LOG_DEBUG(("Freeing client data"));
2881 if (!client->router && !client->connection &&
2882 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2883 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2884 SILC_LOG_ERROR(("****** Contact Pekka"));
2885 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2890 /* If there is pending outgoing data for the client then purge it
2891 to the network before removing the client entry. */
2892 silc_server_packet_queue_purge(server, sock);
2895 /* Check if anyone is watching this nickname */
2896 if (server->server_type == SILC_ROUTER)
2897 silc_server_check_watcher_list(server, client, NULL,
2898 SILC_NOTIFY_TYPE_SIGNOFF);
2900 /* Send SIGNOFF notify to routers. */
2902 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2903 SILC_BROADCAST(server), client->id,
2907 /* Remove client from all channels */
2909 silc_server_remove_from_channels(server, NULL, client,
2910 TRUE, (char *)signoff, TRUE);
2912 silc_server_remove_from_channels(server, NULL, client,
2913 FALSE, NULL, FALSE);
2915 /* Remove this client from watcher list if it is */
2916 silc_server_del_from_watcher_list(server, client);
2918 /* Update statistics */
2919 server->stat.my_clients--;
2920 server->stat.clients--;
2921 if (server->stat.cell_clients)
2922 server->stat.cell_clients--;
2923 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2924 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2925 silc_schedule_task_del_by_context(server->schedule, client);
2927 /* We will not delete the client entry right away. We will take it
2928 into history (for WHOWAS command) for 5 minutes */
2931 silc_schedule_task_add(server->schedule, 0,
2932 silc_server_free_client_data_timeout,
2934 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2935 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2937 client->router = NULL;
2938 client->connection = NULL;
2941 /* Frees user_data pointer from socket connection object. This also sends
2942 appropriate notify packets to the network to inform about leaving
2945 void silc_server_free_sock_user_data(SilcServer server,
2946 SilcSocketConnection sock,
2947 const char *signoff_message)
2949 switch (sock->type) {
2950 case SILC_SOCKET_TYPE_CLIENT:
2952 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2953 silc_server_free_client_data(server, sock, user_data, TRUE,
2957 case SILC_SOCKET_TYPE_SERVER:
2958 case SILC_SOCKET_TYPE_ROUTER:
2960 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2961 SilcServerEntry backup_router = NULL;
2963 SILC_LOG_DEBUG(("Freeing server data"));
2966 backup_router = silc_server_backup_get(server, user_data->id);
2968 /* If this was our primary router connection then we're lost to
2969 the outside world. */
2970 if (server->router == user_data) {
2971 /* Check whether we have a backup router connection */
2972 if (!backup_router || backup_router == user_data) {
2973 silc_schedule_task_add(server->schedule, 0,
2974 silc_server_connect_to_router,
2977 SILC_TASK_PRI_NORMAL);
2979 server->id_entry->router = NULL;
2980 server->router = NULL;
2981 server->standalone = TRUE;
2982 backup_router = NULL;
2984 if (server->id_entry != backup_router) {
2985 SILC_LOG_INFO(("New primary router is backup router %s",
2986 backup_router->server_name));
2987 server->id_entry->router = backup_router;
2988 server->router = backup_router;
2989 server->router_connect = time(0);
2990 server->backup_primary = TRUE;
2992 SILC_LOG_INFO(("We are now new primary router in this cell"));
2993 server->id_entry->router = NULL;
2994 server->router = NULL;
2995 server->standalone = TRUE;
2997 /* We stop here to take a breath */
3001 if (server->server_type == SILC_BACKUP_ROUTER) {
3002 server->server_type = SILC_ROUTER;
3004 /* We'll need to constantly try to reconnect to the primary
3005 router so that we'll see when it comes back online. */
3006 silc_server_backup_reconnect(server, sock->ip, sock->port,
3007 silc_server_backup_connected,
3011 /* Mark this connection as replaced */
3012 silc_server_backup_replaced_add(server, user_data->id,
3015 } else if (backup_router) {
3016 SILC_LOG_INFO(("Enabling the use of backup router %s",
3017 backup_router->server_name));
3018 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3019 backup_router->server_name));
3021 /* Mark this connection as replaced */
3022 silc_server_backup_replaced_add(server, user_data->id,
3026 if (!backup_router) {
3027 /* Remove all servers that are originated from this server, and
3028 remove the clients of those servers too. */
3029 silc_server_remove_servers_by_server(server, user_data, TRUE);
3031 /* Remove the clients that this server owns as they will become
3033 silc_server_remove_clients_by_server(server, user_data,
3036 /* Remove channels owned by this server */
3037 if (server->server_type == SILC_SERVER)
3038 silc_server_remove_channels_by_server(server, user_data);
3040 /* Enable local server connections that may be disabled */
3041 silc_server_local_servers_toggle_enabled(server, TRUE);
3043 /* Update the client entries of this server to the new backup
3044 router. If we are the backup router we also resolve the real
3045 servers for the clients. After updating is over this also
3046 removes the clients that this server explicitly owns. */
3047 silc_server_update_clients_by_server(server, user_data,
3048 backup_router, TRUE);
3050 /* If we are router and just lost our primary router (now standlaone)
3051 we remove everything that was behind it, since we don't know
3053 if (server->server_type == SILC_ROUTER && server->standalone)
3054 /* Remove all servers that are originated from this server, and
3055 remove the clients of those servers too. */
3056 silc_server_remove_servers_by_server(server, user_data, TRUE);
3058 /* Finally remove the clients that are explicitly owned by this
3059 server. They go down with the server. */
3060 silc_server_remove_clients_by_server(server, user_data,
3063 /* Update our server cache to use the new backup router too. */
3064 silc_server_update_servers_by_server(server, user_data, backup_router);
3065 if (server->server_type == SILC_SERVER)
3066 silc_server_update_channels_by_server(server, user_data,
3069 /* Send notify about primary router going down to local operators */
3070 if (server->backup_router)
3071 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3072 SILC_NOTIFY_TYPE_NONE,
3073 ("%s switched to backup router %s "
3074 "(we are primary router now)",
3075 server->server_name, server->server_name));
3077 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3078 SILC_NOTIFY_TYPE_NONE,
3079 ("%s switched to backup router %s",
3080 server->server_name,
3081 server->router->server_name));
3084 /* Free the server entry */
3085 silc_server_backup_del(server, user_data);
3086 silc_server_backup_replaced_del(server, user_data);
3087 silc_idlist_del_data(user_data);
3088 if (!silc_idlist_del_server(server->local_list, user_data))
3089 silc_idlist_del_server(server->global_list, user_data);
3090 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3091 server->stat.my_servers--;
3093 server->stat.my_routers--;
3094 server->stat.routers--;
3096 server->stat.servers--;
3097 if (server->server_type == SILC_ROUTER)
3098 server->stat.cell_servers--;
3100 if (backup_router && backup_router != server->id_entry) {
3101 /* Announce all of our stuff that was created about 5 minutes ago.
3102 The backup router knows all the other stuff already. */
3103 if (server->server_type == SILC_ROUTER)
3104 silc_server_announce_servers(server, FALSE, time(0) - 300,
3105 backup_router->connection);
3107 /* Announce our clients and channels to the router */
3108 silc_server_announce_clients(server, time(0) - 300,
3109 backup_router->connection);
3110 silc_server_announce_channels(server, time(0) - 300,
3111 backup_router->connection);
3117 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3119 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3121 silc_idlist_del_data(user_data);
3122 silc_free(user_data);
3127 /* If any protocol is active cancel its execution */
3128 if (sock->protocol) {
3129 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3130 silc_protocol_cancel(sock->protocol, server->schedule);
3131 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3132 silc_protocol_execute_final(sock->protocol, server->schedule);
3133 sock->protocol = NULL;
3136 sock->user_data = NULL;
3139 /* Removes client from all channels it has joined. This is used when client
3140 connection is disconnected. If the client on a channel is last, the
3141 channel is removed as well. This sends the SIGNOFF notify types. */
3143 void silc_server_remove_from_channels(SilcServer server,
3144 SilcSocketConnection sock,
3145 SilcClientEntry client,
3147 const char *signoff_message,
3150 SilcChannelEntry channel;
3151 SilcChannelClientEntry chl;
3152 SilcHashTableList htl;
3153 SilcBuffer clidp = NULL;
3158 SILC_LOG_DEBUG(("Removing client from joined channels"));
3160 if (notify && !client->id)
3164 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3169 /* Remove the client from all channels. The client is removed from
3170 the channels' user list. */
3171 silc_hash_table_list(client->channels, &htl);
3172 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3173 channel = chl->channel;
3175 /* Remove channel if this is last client leaving the channel, unless
3176 the channel is permanent. */
3177 if (server->server_type != SILC_SERVER &&
3178 silc_hash_table_count(channel->user_list) < 2) {
3179 silc_server_channel_delete(server, channel);
3183 silc_hash_table_del(client->channels, channel);
3184 silc_hash_table_del(channel->user_list, chl->client);
3185 channel->user_count--;
3187 /* If there is no global users on the channel anymore mark the channel
3188 as local channel. Do not check if the removed client is local client. */
3189 if (server->server_type == SILC_SERVER && channel->global_users &&
3190 chl->client->router && !silc_server_channel_has_global(channel))
3191 channel->global_users = FALSE;
3195 /* Update statistics */
3196 if (SILC_IS_LOCAL(client))
3197 server->stat.my_chanclients--;
3198 if (server->server_type == SILC_ROUTER) {
3199 server->stat.cell_chanclients--;
3200 server->stat.chanclients--;
3203 /* If there is not at least one local user on the channel then we don't
3204 need the channel entry anymore, we can remove it safely, unless the
3205 channel is permanent channel */
3206 if (server->server_type == SILC_SERVER &&
3207 !silc_server_channel_has_local(channel)) {
3208 /* Notify about leaving client if this channel has global users. */
3209 if (notify && channel->global_users)
3210 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3211 SILC_NOTIFY_TYPE_SIGNOFF,
3212 signoff_message ? 2 : 1,
3213 clidp->data, clidp->len,
3214 signoff_message, signoff_message ?
3215 strlen(signoff_message) : 0);
3217 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3218 silc_server_channel_delete(server, channel);
3222 /* Send notify to channel about client leaving SILC and channel too */
3224 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3225 SILC_NOTIFY_TYPE_SIGNOFF,
3226 signoff_message ? 2 : 1,
3227 clidp->data, clidp->len,
3228 signoff_message, signoff_message ?
3229 strlen(signoff_message) : 0);
3231 /* Don't create keys if we are shutting down */
3232 if (server->server_shutdown)
3235 /* Re-generate channel key if needed */
3236 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3237 if (!silc_server_create_channel_key(server, channel, 0))
3240 /* Send the channel key to the channel. The key of course is not sent
3241 to the client who was removed from the channel. */
3242 silc_server_send_channel_key(server, client->connection, channel,
3243 server->server_type == SILC_ROUTER ?
3244 FALSE : !server->standalone);
3248 silc_hash_table_list_reset(&htl);
3250 silc_buffer_free(clidp);
3253 /* Removes client from one channel. This is used for example when client
3254 calls LEAVE command to remove itself from the channel. Returns TRUE
3255 if channel still exists and FALSE if the channel is removed when
3256 last client leaves the channel. If `notify' is FALSE notify messages
3259 bool silc_server_remove_from_one_channel(SilcServer server,
3260 SilcSocketConnection sock,
3261 SilcChannelEntry channel,
3262 SilcClientEntry client,
3265 SilcChannelClientEntry chl;
3268 SILC_LOG_DEBUG(("Removing %s from channel %s",
3269 silc_id_render(client->id, SILC_ID_CLIENT),
3270 channel->channel_name));
3272 /* Get the entry to the channel, if this client is not on the channel
3274 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3277 /* Remove channel if this is last client leaving the channel, unless
3278 the channel is permanent. */
3279 if (server->server_type != SILC_SERVER &&
3280 silc_hash_table_count(channel->user_list) < 2) {
3281 silc_server_channel_delete(server, channel);
3285 silc_hash_table_del(client->channels, chl->channel);
3286 silc_hash_table_del(channel->user_list, chl->client);
3287 channel->user_count--;
3289 /* If there is no global users on the channel anymore mark the channel
3290 as local channel. Do not check if the client is local client. */
3291 if (server->server_type == SILC_SERVER && channel->global_users &&
3292 chl->client->router && !silc_server_channel_has_global(channel))
3293 channel->global_users = FALSE;
3297 /* Update statistics */
3298 if (SILC_IS_LOCAL(client))
3299 server->stat.my_chanclients--;
3300 if (server->server_type == SILC_ROUTER) {
3301 server->stat.cell_chanclients--;
3302 server->stat.chanclients--;
3305 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3309 /* If there is not at least one local user on the channel then we don't
3310 need the channel entry anymore, we can remove it safely, unless the
3311 channel is permanent channel */
3312 if (server->server_type == SILC_SERVER &&
3313 !silc_server_channel_has_local(channel)) {
3314 /* Notify about leaving client if this channel has global users. */
3315 if (notify && channel->global_users)
3316 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3317 SILC_NOTIFY_TYPE_LEAVE, 1,
3318 clidp->data, clidp->len);
3320 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3321 silc_server_channel_delete(server, channel);
3322 silc_buffer_free(clidp);
3326 /* Send notify to channel about client leaving the channel */
3328 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3329 SILC_NOTIFY_TYPE_LEAVE, 1,
3330 clidp->data, clidp->len);
3332 silc_buffer_free(clidp);
3336 /* Timeout callback. This is called if connection is idle or for some
3337 other reason is not responding within some period of time. This
3338 disconnects the remote end. */
3340 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3342 SilcServer server = (SilcServer)context;
3343 SilcSocketConnection sock = server->sockets[fd];
3344 SilcProtocolType protocol = 0;
3346 SILC_LOG_DEBUG(("Start"));
3351 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3352 sock->hostname, sock->ip));
3354 /* If we have protocol active we must assure that we call the protocol's
3355 final callback so that all the memory is freed. */
3356 if (sock->protocol) {
3357 protocol = sock->protocol->protocol->type;
3358 silc_protocol_cancel(sock->protocol, server->schedule);
3359 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3360 silc_protocol_execute_final(sock->protocol, server->schedule);
3361 sock->protocol = NULL;
3365 if (sock->user_data)
3366 silc_server_free_sock_user_data(server, sock, NULL);
3368 silc_server_disconnect_remote(server, sock,
3370 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3371 SILC_STATUS_ERR_AUTH_FAILED :
3372 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3373 "Connection timeout");
3376 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3377 function may be used only by router. In real SILC network all channels
3378 are created by routers thus this function is never used by normal
3381 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3382 SilcServerID *router_id,
3388 SilcChannelID *channel_id;
3389 SilcChannelEntry entry;
3393 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3396 cipher = SILC_DEFAULT_CIPHER;
3398 hmac = SILC_DEFAULT_HMAC;
3400 /* Allocate cipher */
3401 if (!silc_cipher_alloc(cipher, &key))
3405 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3406 silc_cipher_free(key);
3410 channel_name = strdup(channel_name);
3412 /* Create the channel ID */
3413 if (!silc_id_create_channel_id(server, router_id, server->rng,
3415 silc_free(channel_name);
3416 silc_cipher_free(key);
3417 silc_hmac_free(newhmac);
3421 /* Create the channel */
3422 entry = silc_idlist_add_channel(server->local_list, channel_name,
3423 SILC_CHANNEL_MODE_NONE, channel_id,
3424 NULL, key, newhmac, 0);
3426 silc_free(channel_name);
3427 silc_cipher_free(key);
3428 silc_hmac_free(newhmac);
3429 silc_free(channel_id);
3433 entry->cipher = strdup(cipher);
3434 entry->hmac_name = strdup(hmac);
3436 /* Now create the actual key material */
3437 if (!silc_server_create_channel_key(server, entry,
3438 silc_cipher_get_key_len(key) / 8)) {
3439 silc_idlist_del_channel(server->local_list, entry);
3443 /* Notify other routers about the new channel. We send the packet
3444 to our primary route. */
3446 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3447 channel_name, entry->id,
3448 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3451 /* Distribute to backup routers */
3452 if (broadcast && server->server_type == SILC_ROUTER) {
3455 SilcUInt32 name_len = strlen(channel_name);
3456 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3457 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3459 packet = silc_channel_payload_encode(channel_name, name_len,
3460 cid, channel_id_len, entry->mode);
3461 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3462 packet->data, packet->len, FALSE, TRUE);
3464 silc_buffer_free(packet);
3467 server->stat.my_channels++;
3468 if (server->server_type == SILC_ROUTER) {
3469 server->stat.channels++;
3470 server->stat.cell_channels++;
3471 entry->users_resolved = TRUE;
3477 /* Same as above but creates the channel with Channel ID `channel_id. */
3480 silc_server_create_new_channel_with_id(SilcServer server,
3484 SilcChannelID *channel_id,
3487 SilcChannelEntry entry;
3491 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3494 cipher = SILC_DEFAULT_CIPHER;
3496 hmac = SILC_DEFAULT_HMAC;
3498 /* Allocate cipher */
3499 if (!silc_cipher_alloc(cipher, &key))
3503 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3504 silc_cipher_free(key);
3508 channel_name = strdup(channel_name);
3510 /* Create the channel */
3511 entry = silc_idlist_add_channel(server->local_list, channel_name,
3512 SILC_CHANNEL_MODE_NONE, channel_id,
3513 NULL, key, newhmac, 0);
3515 silc_cipher_free(key);
3516 silc_hmac_free(newhmac);
3517 silc_free(channel_name);
3521 /* Now create the actual key material */
3522 if (!silc_server_create_channel_key(server, entry,
3523 silc_cipher_get_key_len(key) / 8)) {
3524 silc_idlist_del_channel(server->local_list, entry);
3528 /* Notify other routers about the new channel. We send the packet
3529 to our primary route. */
3531 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3532 channel_name, entry->id,
3533 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3536 /* Distribute to backup routers */
3537 if (broadcast && server->server_type == SILC_ROUTER) {
3540 SilcUInt32 name_len = strlen(channel_name);
3541 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3542 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3544 packet = silc_channel_payload_encode(channel_name, name_len,
3545 cid, channel_id_len, entry->mode);
3546 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3547 packet->data, packet->len, FALSE, TRUE);
3549 silc_buffer_free(packet);
3552 server->stat.my_channels++;
3553 if (server->server_type == SILC_ROUTER) {
3554 server->stat.channels++;
3555 server->stat.cell_channels++;
3556 entry->users_resolved = TRUE;
3562 /* Channel's key re-key timeout callback. */
3564 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3566 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3567 SilcServer server = (SilcServer)rekey->context;
3571 /* Return now if we are shutting down */
3572 if (server->server_shutdown)
3575 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3578 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3581 /* Generates new channel key. This is used to create the initial channel key
3582 but also to re-generate new key for channel. If `key_len' is provided
3583 it is the bytes of the key length. */
3585 bool silc_server_create_channel_key(SilcServer server,
3586 SilcChannelEntry channel,
3590 unsigned char channel_key[32], hash[32];
3593 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3594 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3598 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3600 if (!channel->channel_key)
3601 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3602 channel->channel_key = NULL;
3608 else if (channel->key_len)
3609 len = channel->key_len / 8;
3611 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3613 /* Create channel key */
3614 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3617 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3619 /* Remove old key if exists */
3621 memset(channel->key, 0, channel->key_len / 8);
3622 silc_free(channel->key);
3626 channel->key_len = len * 8;
3627 channel->key = silc_memdup(channel_key, len);
3628 memset(channel_key, 0, sizeof(channel_key));
3630 /* Generate HMAC key from the channel key data and set it */
3632 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3633 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3634 silc_hmac_set_key(channel->hmac, hash,
3635 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3636 memset(hash, 0, sizeof(hash));
3638 if (server->server_type == SILC_ROUTER) {
3639 if (!channel->rekey)
3640 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3641 channel->rekey->context = (void *)server;
3642 channel->rekey->channel = channel;
3643 channel->rekey->key_len = key_len;
3644 if (channel->rekey->task)
3645 silc_schedule_task_del(server->schedule, channel->rekey->task);
3647 channel->rekey->task =
3648 silc_schedule_task_add(server->schedule, 0,
3649 silc_server_channel_key_rekey,
3650 (void *)channel->rekey,
3651 server->config->channel_rekey_secs, 0,
3653 SILC_TASK_PRI_NORMAL);
3659 /* Saves the channel key found in the encoded `key_payload' buffer. This
3660 function is used when we receive Channel Key Payload and also when we're
3661 processing JOIN command reply. Returns entry to the channel. */
3663 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3664 SilcBuffer key_payload,
3665 SilcChannelEntry channel)
3667 SilcChannelKeyPayload payload = NULL;
3668 SilcChannelID *id = NULL;
3669 unsigned char *tmp, hash[32];
3673 /* Decode channel key payload */
3674 payload = silc_channel_key_payload_parse(key_payload->data,
3677 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3682 /* Get the channel entry */
3685 /* Get channel ID */
3686 tmp = silc_channel_key_get_id(payload, &tmp_len);
3687 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3693 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3695 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3697 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3698 silc_id_render(id, SILC_ID_CHANNEL)));
3704 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3706 tmp = silc_channel_key_get_key(payload, &tmp_len);
3712 cipher = silc_channel_key_get_cipher(payload, NULL);
3718 /* Remove old key if exists */
3720 memset(channel->key, 0, channel->key_len / 8);
3721 silc_free(channel->key);
3722 silc_cipher_free(channel->channel_key);
3725 /* Create new cipher */
3726 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3727 channel->channel_key = NULL;
3732 if (channel->cipher)
3733 silc_free(channel->cipher);
3734 channel->cipher = strdup(cipher);
3737 channel->key_len = tmp_len * 8;
3738 channel->key = silc_memdup(tmp, tmp_len);
3739 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3741 /* Generate HMAC key from the channel key data and set it */
3743 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3744 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3745 silc_hmac_set_key(channel->hmac, hash,
3746 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3748 memset(hash, 0, sizeof(hash));
3749 memset(tmp, 0, tmp_len);
3751 if (server->server_type == SILC_ROUTER) {
3752 if (!channel->rekey)
3753 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3754 channel->rekey->context = (void *)server;
3755 channel->rekey->channel = channel;
3756 if (channel->rekey->task)
3757 silc_schedule_task_del(server->schedule, channel->rekey->task);
3759 channel->rekey->task =
3760 silc_schedule_task_add(server->schedule, 0,
3761 silc_server_channel_key_rekey,
3762 (void *)channel->rekey,
3763 server->config->channel_rekey_secs, 0,
3765 SILC_TASK_PRI_NORMAL);
3771 silc_channel_key_payload_free(payload);
3776 /* Heartbeat callback. This function is set as argument for the
3777 silc_socket_set_heartbeat function. The library will call this function
3778 at the set time interval. */
3780 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3783 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3785 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3787 /* Send the heartbeat */
3788 silc_server_send_heartbeat(hb->server, sock);
3791 /* Returns assembled of all servers in the given ID list. The packet's
3792 form is dictated by the New ID payload. */
3794 static void silc_server_announce_get_servers(SilcServer server,
3795 SilcServerEntry remote,
3797 SilcBuffer *servers,
3798 unsigned long creation_time)
3800 SilcIDCacheList list;
3801 SilcIDCacheEntry id_cache;
3802 SilcServerEntry entry;
3805 /* Go through all clients in the list */
3806 if (silc_idcache_get_all(id_list->servers, &list)) {
3807 if (silc_idcache_list_first(list, &id_cache)) {
3809 entry = (SilcServerEntry)id_cache->context;
3811 /* Do not announce the one we've sending our announcements and
3812 do not announce ourself. Also check the creation time if it's
3814 if ((entry == remote) || (entry == server->id_entry) ||
3815 (creation_time && entry->data.created < creation_time)) {
3816 if (!silc_idcache_list_next(list, &id_cache))
3821 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3823 *servers = silc_buffer_realloc(*servers,
3825 (*servers)->truelen + idp->len :
3827 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3828 silc_buffer_put(*servers, idp->data, idp->len);
3829 silc_buffer_pull(*servers, idp->len);
3830 silc_buffer_free(idp);
3832 if (!silc_idcache_list_next(list, &id_cache))
3837 silc_idcache_list_free(list);
3842 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3848 p = silc_notify_payload_encode(notify, argc, ap);
3854 /* This function is used by router to announce existing servers to our
3855 primary router when we've connected to it. If `creation_time' is non-zero
3856 then only the servers that has been created after the `creation_time'
3857 will be announced. */
3859 void silc_server_announce_servers(SilcServer server, bool global,
3860 unsigned long creation_time,
3861 SilcSocketConnection remote)
3863 SilcBuffer servers = NULL;
3865 SILC_LOG_DEBUG(("Announcing servers"));
3867 /* Get servers in local list */
3868 silc_server_announce_get_servers(server, remote->user_data,
3869 server->local_list, &servers,
3873 /* Get servers in global list */
3874 silc_server_announce_get_servers(server, remote->user_data,
3875 server->global_list, &servers,
3879 silc_buffer_push(servers, servers->data - servers->head);
3880 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3882 /* Send the packet */
3883 silc_server_packet_send(server, remote,
3884 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3885 servers->data, servers->len, TRUE);
3887 silc_buffer_free(servers);
3891 /* Returns assembled packet of all clients in the given ID list. The
3892 packet's form is dictated by the New ID Payload. */
3894 static void silc_server_announce_get_clients(SilcServer server,
3896 SilcBuffer *clients,
3898 unsigned long creation_time)
3900 SilcIDCacheList list;
3901 SilcIDCacheEntry id_cache;
3902 SilcClientEntry client;
3905 unsigned char mode[4];
3907 /* Go through all clients in the list */
3908 if (silc_idcache_get_all(id_list->clients, &list)) {
3909 if (silc_idcache_list_first(list, &id_cache)) {
3911 client = (SilcClientEntry)id_cache->context;
3913 if (creation_time && client->data.created < creation_time) {
3914 if (!silc_idcache_list_next(list, &id_cache))
3919 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3921 *clients = silc_buffer_realloc(*clients,
3923 (*clients)->truelen + idp->len :
3925 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3926 silc_buffer_put(*clients, idp->data, idp->len);
3927 silc_buffer_pull(*clients, idp->len);
3929 SILC_PUT32_MSB(client->mode, mode);
3931 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3932 2, idp->data, idp->len,
3934 *umodes = silc_buffer_realloc(*umodes,
3936 (*umodes)->truelen + tmp->len :
3938 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3939 silc_buffer_put(*umodes, tmp->data, tmp->len);
3940 silc_buffer_pull(*umodes, tmp->len);
3941 silc_buffer_free(tmp);
3943 silc_buffer_free(idp);
3945 if (!silc_idcache_list_next(list, &id_cache))
3950 silc_idcache_list_free(list);
3954 /* This function is used to announce our existing clients to our router
3955 when we've connected to it. If `creation_time' is non-zero then only
3956 the clients that has been created after the `creation_time' will be
3959 void silc_server_announce_clients(SilcServer server,
3960 unsigned long creation_time,
3961 SilcSocketConnection remote)
3963 SilcBuffer clients = NULL;
3964 SilcBuffer umodes = NULL;
3966 SILC_LOG_DEBUG(("Announcing clients"));
3968 /* Get clients in local list */
3969 silc_server_announce_get_clients(server, server->local_list,
3970 &clients, &umodes, creation_time);
3972 /* As router we announce our global list as well */
3973 if (server->server_type == SILC_ROUTER)
3974 silc_server_announce_get_clients(server, server->global_list,
3975 &clients, &umodes, creation_time);
3978 silc_buffer_push(clients, clients->data - clients->head);
3979 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3981 /* Send the packet */
3982 silc_server_packet_send(server, remote,
3983 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3984 clients->data, clients->len, TRUE);
3986 silc_buffer_free(clients);
3990 silc_buffer_push(umodes, umodes->data - umodes->head);
3991 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3993 /* Send the packet */
3994 silc_server_packet_send(server, remote,
3995 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3996 umodes->data, umodes->len, TRUE);
3998 silc_buffer_free(umodes);
4002 /* Returns channel's topic for announcing it */
4004 void silc_server_announce_get_channel_topic(SilcServer server,
4005 SilcChannelEntry channel,
4010 if (channel->topic) {
4011 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4012 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4013 chidp->data, chidp->len,
4015 strlen(channel->topic));
4016 silc_buffer_free(chidp);
4020 /* Returns assembled packets for channel users of the `channel'. */
4022 void silc_server_announce_get_channel_users(SilcServer server,
4023 SilcChannelEntry channel,
4024 SilcBuffer *channel_modes,
4025 SilcBuffer *channel_users,
4026 SilcBuffer *channel_users_modes)
4028 SilcChannelClientEntry chl;
4029 SilcHashTableList htl;
4030 SilcBuffer chidp, clidp, csidp;
4033 unsigned char mode[4], *fkey = NULL;
4034 SilcUInt32 fkey_len = 0;
4037 SILC_LOG_DEBUG(("Start"));
4039 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4040 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4043 SILC_PUT32_MSB(channel->mode, mode);
4044 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4045 if (channel->founder_key)
4046 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4048 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4049 6, csidp->data, csidp->len,
4052 hmac, hmac ? strlen(hmac) : 0,
4053 channel->passphrase,
4054 channel->passphrase ?
4055 strlen(channel->passphrase) : 0,
4059 silc_buffer_realloc(*channel_modes,
4061 (*channel_modes)->truelen + len : len));
4062 silc_buffer_pull_tail(*channel_modes,
4063 ((*channel_modes)->end -
4064 (*channel_modes)->data));
4065 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4066 silc_buffer_pull(*channel_modes, len);
4067 silc_buffer_free(tmp);
4072 /* Now find all users on the channel */
4073 silc_hash_table_list(channel->user_list, &htl);
4074 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4075 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4078 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4079 clidp->data, clidp->len,
4080 chidp->data, chidp->len);
4083 silc_buffer_realloc(*channel_users,
4085 (*channel_users)->truelen + len : len));
4086 silc_buffer_pull_tail(*channel_users,
4087 ((*channel_users)->end -
4088 (*channel_users)->data));
4090 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4091 silc_buffer_pull(*channel_users, len);
4092 silc_buffer_free(tmp);
4094 /* CUMODE notify for mode change on the channel */
4095 SILC_PUT32_MSB(chl->mode, mode);
4096 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4097 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4098 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4099 4, csidp->data, csidp->len,
4101 clidp->data, clidp->len,
4104 *channel_users_modes =
4105 silc_buffer_realloc(*channel_users_modes,
4106 (*channel_users_modes ?
4107 (*channel_users_modes)->truelen + len : len));
4108 silc_buffer_pull_tail(*channel_users_modes,
4109 ((*channel_users_modes)->end -
4110 (*channel_users_modes)->data));
4112 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4113 silc_buffer_pull(*channel_users_modes, len);
4114 silc_buffer_free(tmp);
4118 silc_buffer_free(clidp);
4120 silc_hash_table_list_reset(&htl);
4121 silc_buffer_free(chidp);
4122 silc_buffer_free(csidp);
4125 /* Returns assembled packets for all channels and users on those channels
4126 from the given ID List. The packets are in the form dictated by the
4127 New Channel and New Channel User payloads. */
4129 void silc_server_announce_get_channels(SilcServer server,
4131 SilcBuffer *channels,
4132 SilcBuffer **channel_modes,
4133 SilcBuffer *channel_users,
4134 SilcBuffer **channel_users_modes,
4135 SilcUInt32 *channel_users_modes_c,
4136 SilcBuffer **channel_topics,
4137 SilcChannelID ***channel_ids,
4138 unsigned long creation_time)
4140 SilcIDCacheList list;
4141 SilcIDCacheEntry id_cache;
4142 SilcChannelEntry channel;
4145 SilcUInt16 name_len;
4147 int i = *channel_users_modes_c;
4150 SILC_LOG_DEBUG(("Start"));
4152 /* Go through all channels in the list */
4153 if (silc_idcache_get_all(id_list->channels, &list)) {
4154 if (silc_idcache_list_first(list, &id_cache)) {
4156 channel = (SilcChannelEntry)id_cache->context;
4158 if (creation_time && channel->created < creation_time)
4163 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4164 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4165 name_len = strlen(channel->channel_name);
4168 len = 4 + name_len + id_len + 4;
4170 silc_buffer_realloc(*channels,
4171 (*channels ? (*channels)->truelen +
4173 silc_buffer_pull_tail(*channels,
4174 ((*channels)->end - (*channels)->data));
4175 silc_buffer_format(*channels,
4176 SILC_STR_UI_SHORT(name_len),
4177 SILC_STR_UI_XNSTRING(channel->channel_name,
4179 SILC_STR_UI_SHORT(id_len),
4180 SILC_STR_UI_XNSTRING(cid, id_len),
4181 SILC_STR_UI_INT(channel->mode),
4183 silc_buffer_pull(*channels, len);
4186 if (creation_time && channel->updated < creation_time)
4192 /* Channel user modes */
4193 *channel_users_modes = silc_realloc(*channel_users_modes,
4194 sizeof(**channel_users_modes) *
4196 (*channel_users_modes)[i] = NULL;
4197 *channel_modes = silc_realloc(*channel_modes,
4198 sizeof(**channel_modes) * (i + 1));
4199 (*channel_modes)[i] = NULL;
4200 *channel_ids = silc_realloc(*channel_ids,
4201 sizeof(**channel_ids) * (i + 1));
4202 (*channel_ids)[i] = NULL;
4203 silc_server_announce_get_channel_users(server, channel,
4204 &(*channel_modes)[i],
4206 &(*channel_users_modes)[i]);
4207 (*channel_ids)[i] = channel->id;
4209 /* Channel's topic */
4210 *channel_topics = silc_realloc(*channel_topics,
4211 sizeof(**channel_topics) * (i + 1));
4212 (*channel_topics)[i] = NULL;
4213 silc_server_announce_get_channel_topic(server, channel,
4214 &(*channel_topics)[i]);
4215 (*channel_users_modes_c)++;
4219 if (!silc_idcache_list_next(list, &id_cache))
4224 silc_idcache_list_free(list);
4228 /* This function is used to announce our existing channels to our router
4229 when we've connected to it. This also announces the users on the
4230 channels to the router. If the `creation_time' is non-zero only the
4231 channels that was created after the `creation_time' are announced.
4232 Note that the channel users are still announced even if the `creation_time'
4235 void silc_server_announce_channels(SilcServer server,
4236 unsigned long creation_time,
4237 SilcSocketConnection remote)
4239 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4240 SilcBuffer *channel_users_modes = NULL;
4241 SilcBuffer *channel_topics = NULL;
4242 SilcUInt32 channel_users_modes_c = 0;
4243 SilcChannelID **channel_ids = NULL;
4245 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4247 /* Get channels and channel users in local list */
4248 silc_server_announce_get_channels(server, server->local_list,
4249 &channels, &channel_modes,
4251 &channel_users_modes,
4252 &channel_users_modes_c,
4254 &channel_ids, creation_time);
4256 /* Get channels and channel users in global list */
4257 if (server->server_type != SILC_SERVER)
4258 silc_server_announce_get_channels(server, server->global_list,
4259 &channels, &channel_modes,
4261 &channel_users_modes,
4262 &channel_users_modes_c,
4264 &channel_ids, creation_time);
4267 silc_buffer_push(channels, channels->data - channels->head);
4268 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4270 /* Send the packet */
4271 silc_server_packet_send(server, remote,
4272 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4273 channels->data, channels->len,
4276 silc_buffer_free(channels);
4279 if (channel_users) {
4280 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4281 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4282 channel_users->len);
4284 /* Send the packet */
4285 silc_server_packet_send(server, remote,
4286 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4287 channel_users->data, channel_users->len,
4290 silc_buffer_free(channel_users);
4293 if (channel_modes) {
4296 for (i = 0; i < channel_users_modes_c; i++) {
4297 if (!channel_modes[i])
4299 silc_buffer_push(channel_modes[i],
4300 channel_modes[i]->data -
4301 channel_modes[i]->head);
4302 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4303 channel_modes[i]->len);
4304 silc_server_packet_send_dest(server, remote,
4305 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4306 channel_ids[i], SILC_ID_CHANNEL,
4307 channel_modes[i]->data,
4308 channel_modes[i]->len,
4310 silc_buffer_free(channel_modes[i]);
4312 silc_free(channel_modes);
4315 if (channel_users_modes) {
4318 for (i = 0; i < channel_users_modes_c; i++) {
4319 if (!channel_users_modes[i])
4321 silc_buffer_push(channel_users_modes[i],
4322 channel_users_modes[i]->data -
4323 channel_users_modes[i]->head);
4324 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4325 channel_users_modes[i]->len);
4326 silc_server_packet_send_dest(server, remote,
4327 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4328 channel_ids[i], SILC_ID_CHANNEL,
4329 channel_users_modes[i]->data,
4330 channel_users_modes[i]->len,
4332 silc_buffer_free(channel_users_modes[i]);
4334 silc_free(channel_users_modes);
4337 if (channel_topics) {
4340 for (i = 0; i < channel_users_modes_c; i++) {
4341 if (!channel_topics[i])
4344 silc_buffer_push(channel_topics[i],
4345 channel_topics[i]->data -
4346 channel_topics[i]->head);
4347 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4348 channel_topics[i]->len);
4349 silc_server_packet_send_dest(server, remote,
4350 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4351 channel_ids[i], SILC_ID_CHANNEL,
4352 channel_topics[i]->data,
4353 channel_topics[i]->len,
4355 silc_buffer_free(channel_topics[i]);
4357 silc_free(channel_topics);
4360 silc_free(channel_ids);
4363 /* Failure timeout callback. If this is called then we will immediately
4364 process the received failure. We always process the failure with timeout
4365 since we do not want to blindly trust to received failure packets.
4366 This won't be called (the timeout is cancelled) if the failure was
4367 bogus (it is bogus if remote does not close the connection after sending
4370 SILC_TASK_CALLBACK(silc_server_failure_callback)
4372 SilcServerFailureContext f = (SilcServerFailureContext)context;
4374 if (f->sock->protocol) {
4375 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4376 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4382 /* Assembles user list and users mode list from the `channel'. */
4384 bool silc_server_get_users_on_channel(SilcServer server,
4385 SilcChannelEntry channel,
4386 SilcBuffer *user_list,
4387 SilcBuffer *mode_list,
4388 SilcUInt32 *user_count)
4390 SilcChannelClientEntry chl;
4391 SilcHashTableList htl;
4392 SilcBuffer client_id_list;
4393 SilcBuffer client_mode_list;
4395 SilcUInt32 list_count = 0, len = 0;
4397 if (!silc_hash_table_count(channel->user_list))
4400 silc_hash_table_list(channel->user_list, &htl);
4401 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4402 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4403 silc_hash_table_list_reset(&htl);
4405 client_id_list = silc_buffer_alloc(len);
4407 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4408 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4409 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4411 silc_hash_table_list(channel->user_list, &htl);
4412 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4414 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4415 silc_buffer_put(client_id_list, idp->data, idp->len);
4416 silc_buffer_pull(client_id_list, idp->len);
4417 silc_buffer_free(idp);
4419 /* Client's mode on channel */
4420 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4421 silc_buffer_pull(client_mode_list, 4);
4425 silc_hash_table_list_reset(&htl);
4426 silc_buffer_push(client_id_list,
4427 client_id_list->data - client_id_list->head);
4428 silc_buffer_push(client_mode_list,
4429 client_mode_list->data - client_mode_list->head);
4431 *user_list = client_id_list;
4432 *mode_list = client_mode_list;
4433 *user_count = list_count;
4437 /* Saves users and their modes to the `channel'. */
4439 void silc_server_save_users_on_channel(SilcServer server,
4440 SilcSocketConnection sock,
4441 SilcChannelEntry channel,
4442 SilcClientID *noadd,
4443 SilcBuffer user_list,
4444 SilcBuffer mode_list,
4445 SilcUInt32 user_count)
4450 SilcClientID *client_id;
4451 SilcClientEntry client;
4452 SilcIDCacheEntry cache;
4453 SilcChannelClientEntry chl;
4456 SILC_LOG_DEBUG(("Start"));
4458 for (i = 0; i < user_count; i++) {
4460 SILC_GET16_MSB(idp_len, user_list->data + 2);
4462 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4463 silc_buffer_pull(user_list, idp_len);
4468 SILC_GET32_MSB(mode, mode_list->data);
4469 silc_buffer_pull(mode_list, 4);
4471 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4472 silc_free(client_id);
4478 /* Check if we have this client cached already. */
4479 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4480 server->server_type, &cache);
4482 client = silc_idlist_find_client_by_id(server->global_list,
4483 client_id, server->server_type,
4488 /* If router did not find such Client ID in its lists then this must
4489 be bogus client or some router in the net is buggy. */
4490 if (server->server_type == SILC_ROUTER) {
4491 silc_free(client_id);
4495 /* We don't have that client anywhere, add it. The client is added
4496 to global list since server didn't have it in the lists so it must be
4498 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4499 silc_id_dup(client_id, SILC_ID_CLIENT),
4500 sock->user_data, NULL, 0);
4502 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4503 silc_free(client_id);
4507 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4509 /* Found, if it is from global list we'll assure that we won't
4510 expire it now that the entry is on channel. */
4515 silc_free(client_id);
4517 if (!silc_server_client_on_channel(client, channel, &chl)) {
4518 /* Client was not on the channel, add it. */
4519 chl = silc_calloc(1, sizeof(*chl));
4520 chl->client = client;
4522 chl->channel = channel;
4523 silc_hash_table_add(channel->user_list, chl->client, chl);
4524 silc_hash_table_add(client->channels, chl->channel, chl);
4525 channel->user_count++;
4533 /* Saves channels and channels user modes to the `client'. Removes
4534 the client from those channels that are not sent in the list but
4537 void silc_server_save_user_channels(SilcServer server,
4538 SilcSocketConnection sock,
4539 SilcClientEntry client,
4540 SilcBuffer channels,
4541 SilcBuffer channels_user_modes)
4544 SilcUInt32 *chumodes;
4545 SilcChannelPayload entry;
4546 SilcChannelEntry channel;
4547 SilcChannelID *channel_id;
4548 SilcChannelClientEntry chl;
4549 SilcHashTable ht = NULL;
4550 SilcHashTableList htl;
4554 if (!channels ||!channels_user_modes)
4557 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4558 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4560 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4561 NULL, NULL, NULL, TRUE);
4562 silc_dlist_start(ch);
4563 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4564 /* Check if we have this channel, and add it if we don't have it.
4565 Also add the client on the channel unless it is there already. */
4566 channel_id = silc_channel_get_id_parse(entry);
4567 channel = silc_idlist_find_channel_by_id(server->local_list,
4570 channel = silc_idlist_find_channel_by_id(server->global_list,
4573 if (server->server_type != SILC_SERVER) {
4574 silc_free(channel_id);
4579 /* We don't have that channel anywhere, add it. */
4580 name = silc_channel_get_name(entry, NULL);
4581 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4582 channel_id, server->router,
4585 silc_free(channel_id);
4592 channel->mode = silc_channel_get_mode(entry);
4594 /* Add the client on the channel */
4595 if (!silc_server_client_on_channel(client, channel, &chl)) {
4596 chl = silc_calloc(1, sizeof(*chl));
4597 chl->client = client;
4598 chl->mode = chumodes[i++];
4599 chl->channel = channel;
4600 silc_hash_table_add(channel->user_list, chl->client, chl);
4601 silc_hash_table_add(client->channels, chl->channel, chl);
4602 channel->user_count++;
4605 chl->mode = chumodes[i++];
4608 silc_hash_table_add(ht, channel, channel);
4609 silc_free(channel_id);
4611 silc_channel_payload_list_free(ch);
4612 silc_free(chumodes);
4616 /* Go through the list again and remove client from channels that
4617 are no part of the list. */
4619 silc_hash_table_list(client->channels, &htl);
4620 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4621 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4622 silc_hash_table_del(chl->channel->user_list, chl->client);
4623 silc_hash_table_del(chl->client->channels, chl->channel);
4627 silc_hash_table_list_reset(&htl);
4628 silc_hash_table_free(ht);
4630 silc_hash_table_list(client->channels, &htl);
4631 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4632 silc_hash_table_del(chl->channel->user_list, chl->client);
4633 silc_hash_table_del(chl->client->channels, chl->channel);
4636 silc_hash_table_list_reset(&htl);
4640 /* Lookups route to the client indicated by the `id_data'. The connection
4641 object and internal data object is returned. Returns NULL if route
4642 could not be found to the client. If the `client_id' is specified then
4643 it is used and the `id_data' is ignored. */
4645 SilcSocketConnection
4646 silc_server_get_client_route(SilcServer server,
4647 unsigned char *id_data,
4649 SilcClientID *client_id,
4650 SilcIDListData *idata,
4651 SilcClientEntry *client_entry)
4654 SilcClientEntry client;
4656 SILC_LOG_DEBUG(("Start"));
4659 *client_entry = NULL;
4661 /* Decode destination Client ID */
4663 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4665 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4669 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4672 /* If the destination belongs to our server we don't have to route
4673 the packet anywhere but to send it to the local destination. */
4674 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4678 /* If we are router and the client has router then the client is in
4679 our cell but not directly connected to us. */
4680 if (server->server_type == SILC_ROUTER && client->router) {
4681 /* We are of course in this case the client's router thus the route
4682 to the client is the server who owns the client. So, we will send
4683 the packet to that server. */
4685 *idata = (SilcIDListData)client->router;
4686 return client->router->connection;
4689 /* Seems that client really is directly connected to us */
4691 *idata = (SilcIDListData)client;
4693 *client_entry = client;
4694 return client->connection;
4697 /* Destination belongs to someone not in this server. If we are normal
4698 server our action is to send the packet to our router. */
4699 if (server->server_type != SILC_ROUTER && !server->standalone) {
4702 *idata = (SilcIDListData)server->router;
4703 return SILC_PRIMARY_ROUTE(server);
4706 /* We are router and we will perform route lookup for the destination
4707 and send the packet to fastest route. */
4708 if (server->server_type == SILC_ROUTER && !server->standalone) {
4709 /* Check first that the ID is valid */
4710 client = silc_idlist_find_client_by_id(server->global_list, id,
4713 SilcSocketConnection dst_sock;
4715 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4719 *idata = (SilcIDListData)dst_sock->user_data;
4728 /* Encodes and returns channel list of channels the `client' has joined.
4729 Secret channels are not put to the list. */
4731 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4732 SilcClientEntry client,
4735 SilcBuffer *user_mode_list)
4737 SilcBuffer buffer = NULL;
4738 SilcChannelEntry channel;
4739 SilcChannelClientEntry chl;
4740 SilcHashTableList htl;
4743 SilcUInt16 name_len;
4747 *user_mode_list = NULL;
4749 silc_hash_table_list(client->channels, &htl);
4750 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4751 channel = chl->channel;
4753 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4755 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4758 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4759 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4760 name_len = strlen(channel->channel_name);
4762 len = 4 + name_len + id_len + 4;
4763 buffer = silc_buffer_realloc(buffer,
4764 (buffer ? buffer->truelen + len : len));
4765 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4766 silc_buffer_format(buffer,
4767 SILC_STR_UI_SHORT(name_len),
4768 SILC_STR_UI_XNSTRING(channel->channel_name,
4770 SILC_STR_UI_SHORT(id_len),
4771 SILC_STR_UI_XNSTRING(cid, id_len),
4772 SILC_STR_UI_INT(chl->channel->mode),
4774 silc_buffer_pull(buffer, len);
4777 if (user_mode_list) {
4778 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4780 (*user_mode_list)->truelen + 4 :
4782 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4783 (*user_mode_list)->data));
4784 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4785 silc_buffer_pull(*user_mode_list, 4);
4788 silc_hash_table_list_reset(&htl);
4791 silc_buffer_push(buffer, buffer->data - buffer->head);
4792 if (user_mode_list && *user_mode_list)
4793 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4794 (*user_mode_list)->head));
4799 /* Finds client entry by Client ID and if it is not found then resolves
4800 it using WHOIS command. */
4802 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4803 SilcClientID *client_id,
4804 bool always_resolve,
4807 SilcClientEntry client;
4812 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4815 client = silc_idlist_find_client_by_id(server->global_list,
4816 client_id, TRUE, NULL);
4817 if (!client && server->server_type == SILC_ROUTER)
4821 if (!client && server->standalone)
4824 if (!client || !client->nickname || !client->username ||
4826 SilcBuffer buffer, idp;
4829 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4830 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4831 client->resolve_cmd_ident = ++server->cmd_ident;
4834 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4835 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4836 server->cmd_ident, 1,
4837 4, idp->data, idp->len);
4838 silc_server_packet_send(server, client ? client->router->connection :
4839 SILC_PRIMARY_ROUTE(server),
4840 SILC_PACKET_COMMAND, 0,
4841 buffer->data, buffer->len, FALSE);
4842 silc_buffer_free(idp);
4843 silc_buffer_free(buffer);
4854 /* A timeout callback for the re-key. We will be the initiator of the
4857 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4859 SilcSocketConnection sock = (SilcSocketConnection)context;
4860 SilcIDListData idata = (SilcIDListData)sock->user_data;
4861 SilcServer server = (SilcServer)idata->rekey->context;
4862 SilcProtocol protocol;
4863 SilcServerRekeyInternalContext *proto_ctx;
4865 /* Allocate internal protocol context. This is sent as context
4867 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4868 proto_ctx->server = (void *)server;
4869 proto_ctx->sock = sock;
4870 proto_ctx->responder = FALSE;
4871 proto_ctx->pfs = idata->rekey->pfs;
4873 /* Perform rekey protocol. Will call the final callback after the
4874 protocol is over. */
4875 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4876 &protocol, proto_ctx, silc_server_rekey_final);
4877 sock->protocol = protocol;
4879 /* Run the protocol */
4880 silc_protocol_execute(protocol, server->schedule, 0, 0);
4882 SILC_LOG_DEBUG(("Rekey protocol completed"));
4884 /* Re-register re-key timeout */
4885 silc_schedule_task_add(server->schedule, sock->sock,
4886 silc_server_rekey_callback,
4887 context, idata->rekey->timeout, 0,
4888 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4891 /* The final callback for the REKEY protocol. This will actually take the
4892 new key material into use. */
4894 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4896 SilcProtocol protocol = (SilcProtocol)context;
4897 SilcServerRekeyInternalContext *ctx =
4898 (SilcServerRekeyInternalContext *)protocol->context;
4899 SilcServer server = (SilcServer)ctx->server;
4900 SilcSocketConnection sock = ctx->sock;
4902 SILC_LOG_DEBUG(("Start"));
4904 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4905 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4906 /* Error occured during protocol */
4907 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4908 silc_protocol_cancel(protocol, server->schedule);
4909 silc_protocol_free(protocol);
4910 sock->protocol = NULL;
4912 silc_packet_context_free(ctx->packet);
4914 silc_ske_free(ctx->ske);
4919 /* Purge the outgoing data queue to assure that all rekey packets really
4920 go to the network before we quit the protocol. */
4921 silc_server_packet_queue_purge(server, sock);
4924 silc_protocol_free(protocol);
4925 sock->protocol = NULL;
4927 silc_packet_context_free(ctx->packet);
4929 silc_ske_free(ctx->ske);
4933 /* Task callback used to retrieve network statistical information from
4934 router server once in a while. */
4936 SILC_TASK_CALLBACK(silc_server_get_stats)
4938 SilcServer server = (SilcServer)context;
4939 SilcBuffer idp, packet;
4941 SILC_LOG_DEBUG(("Retrieving stats from router"));
4943 if (!server->standalone) {
4944 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4945 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4946 ++server->cmd_ident, 1,
4947 1, idp->data, idp->len);
4948 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4949 SILC_PACKET_COMMAND, 0, packet->data,
4950 packet->len, FALSE);
4951 silc_buffer_free(packet);
4952 silc_buffer_free(idp);
4955 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4956 server, 120, 0, SILC_TASK_TIMEOUT,