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;
1919 /* Remove the backup waiting with timeout */
1920 silc_schedule_task_add(server->schedule, 0,
1921 silc_server_backup_router_wait,
1922 (void *)server, 5, 0,
1923 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1927 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1928 server->stat.my_servers++;
1930 server->stat.my_routers++;
1931 server->stat.routers++;
1933 server->stat.servers++;
1935 /* Check whether this connection is to be our primary router connection
1936 if we do not already have the primary route. */
1937 if (!backup_router &&
1938 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1939 if (silc_server_config_is_primary_route(server) && !initiator)
1942 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1943 server->standalone = FALSE;
1944 if (!server->id_entry->router) {
1945 server->id_entry->router = id_entry;
1946 server->router = id_entry;
1957 sock->type = ctx->conn_type;
1959 /* Add the common data structure to the ID entry. */
1960 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1962 /* Add to sockets internal pointer for fast referencing */
1963 silc_free(sock->user_data);
1964 sock->user_data = id_entry;
1966 /* Connection has been fully established now. Everything is ok. */
1967 SILC_LOG_DEBUG(("New connection authenticated"));
1969 /* Perform keepalive. The `hb_context' will be freed automatically
1970 when finally calling the silc_socket_free function. */
1971 hb_context = silc_calloc(1, sizeof(*hb_context));
1972 hb_context->server = server;
1973 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1974 silc_server_perform_heartbeat,
1978 silc_schedule_task_del_by_callback(server->schedule,
1979 silc_server_failure_callback);
1980 silc_protocol_free(protocol);
1982 silc_packet_context_free(ctx->packet);
1984 silc_ske_free(ctx->ske);
1985 silc_free(ctx->dest_id);
1986 silc_server_config_unref(&ctx->cconfig);
1987 silc_server_config_unref(&ctx->sconfig);
1988 silc_server_config_unref(&ctx->rconfig);
1990 sock->protocol = NULL;
1993 /* This function is used to read packets from network and send packets to
1994 network. This is usually a generic task. */
1996 SILC_TASK_CALLBACK(silc_server_packet_process)
1998 SilcServer server = (SilcServer)context;
1999 SilcSocketConnection sock = server->sockets[fd];
2000 SilcIDListData idata;
2001 SilcCipher cipher = NULL;
2002 SilcHmac hmac = NULL;
2003 SilcUInt32 sequence = 0;
2007 SILC_LOG_DEBUG(("Unknown socket connection"));
2011 /* Packet sending */
2013 if (type == SILC_TASK_WRITE) {
2014 /* Do not send data to disconnected connection */
2015 if (SILC_IS_DISCONNECTED(sock)) {
2016 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2020 server->stat.packets_sent++;
2022 /* Send the packet */
2023 ret = silc_packet_send(sock, TRUE);
2025 /* If returned -2 could not write to connection now, will do
2031 SILC_LOG_ERROR(("Error sending packet to connection "
2032 "%s:%d [%s]", sock->hostname, sock->port,
2033 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2034 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2035 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2040 /* The packet has been sent and now it is time to set the connection
2041 back to only for input. When there is again some outgoing data
2042 available for this connection it will be set for output as well.
2043 This call clears the output setting and sets it only for input. */
2044 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2045 SILC_UNSET_OUTBUF_PENDING(sock);
2047 silc_buffer_clear(sock->outbuf);
2051 /* Packet receiving */
2053 /* Read some data from connection */
2054 ret = silc_packet_receive(sock);
2058 SILC_LOG_ERROR(("Error receiving packet from connection "
2059 "%s:%d [%s] %s", sock->hostname, sock->port,
2060 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2061 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2062 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2063 "Router"), strerror(errno)));
2069 SILC_LOG_DEBUG(("Read EOF"));
2071 /* If connection is disconnecting already we will finally
2072 close the connection */
2073 if (SILC_IS_DISCONNECTING(sock)) {
2074 if (sock->user_data)
2075 silc_server_free_sock_user_data(server, sock, NULL);
2076 silc_server_close_connection(server, sock);
2080 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2081 SILC_SET_DISCONNECTING(sock);
2083 if (sock->user_data) {
2085 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2086 silc_server_free_sock_user_data(server, sock, tmp);
2088 silc_server_free_sock_user_data(server, sock, NULL);
2089 } else if (server->router_conn && server->router_conn->sock == sock &&
2090 !server->router && server->standalone)
2091 silc_schedule_task_add(server->schedule, 0,
2092 silc_server_connect_to_router,
2095 SILC_TASK_PRI_NORMAL);
2097 silc_server_close_connection(server, sock);
2101 /* If connection is disconnecting or disconnected we will ignore
2103 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2104 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2108 /* Get keys and stuff from ID entry */
2109 idata = (SilcIDListData)sock->user_data;
2111 cipher = idata->receive_key;
2112 hmac = idata->hmac_receive;
2113 sequence = idata->psn_receive;
2116 /* Process the packet. This will call the parser that will then
2117 decrypt and parse the packet. */
2118 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2119 TRUE : FALSE, cipher, hmac, sequence,
2120 silc_server_packet_parse, server);
2122 /* If this socket connection is not authenticated yet and the packet
2123 processing failed we will drop the connection since it can be
2124 a malicious flooder. */
2125 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2126 (!sock->protocol || sock->protocol->protocol->type ==
2127 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2128 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2129 SILC_SET_DISCONNECTING(sock);
2131 if (sock->user_data)
2132 silc_server_free_sock_user_data(server, sock, NULL);
2133 silc_server_close_connection(server, sock);
2137 /* Parses whole packet, received earlier. */
2139 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2141 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2142 SilcServer server = (SilcServer)parse_ctx->context;
2143 SilcSocketConnection sock = parse_ctx->sock;
2144 SilcPacketContext *packet = parse_ctx->packet;
2145 SilcIDListData idata = (SilcIDListData)sock->user_data;
2148 server->stat.packets_received++;
2150 /* Parse the packet */
2151 if (parse_ctx->normal)
2152 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2154 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2156 /* If entry is disabled ignore what we got. */
2157 if (ret != SILC_PACKET_RESUME_ROUTER &&
2158 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2159 SILC_LOG_DEBUG(("Connection is disabled"));
2162 if (ret != SILC_PACKET_HEARTBEAT &&
2163 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2164 SILC_LOG_DEBUG(("Connection is disabled"));
2168 if (ret == SILC_PACKET_NONE) {
2169 SILC_LOG_DEBUG(("Error parsing packet"));
2173 /* Check that the the current client ID is same as in the client's packet. */
2174 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2175 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2176 if (client && client->id && packet->src_id) {
2177 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2178 packet->src_id_type);
2179 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2181 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2188 if (server->server_type == SILC_ROUTER) {
2189 /* Route the packet if it is not destined to us. Other ID types but
2190 server are handled separately after processing them. */
2191 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2192 packet->dst_id_type == SILC_ID_SERVER &&
2193 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2194 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2196 /* Route the packet to fastest route for the destination ID */
2197 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2198 packet->dst_id_type);
2201 silc_server_packet_route(server,
2202 silc_server_route_get(server, id,
2203 packet->dst_id_type),
2210 /* Parse the incoming packet type */
2211 silc_server_packet_parse_type(server, sock, packet);
2213 /* Broadcast packet if it is marked as broadcast packet and it is
2214 originated from router and we are router. */
2215 if (server->server_type == SILC_ROUTER &&
2216 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2217 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2218 /* Broadcast to our primary route */
2219 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2221 /* If we have backup routers then we need to feed all broadcast
2222 data to those servers. */
2223 silc_server_backup_broadcast(server, sock, packet);
2227 silc_packet_context_free(packet);
2228 silc_free(parse_ctx);
2231 /* Parser callback called by silc_packet_receive_process. This merely
2232 registers timeout that will handle the actual parsing when appropriate. */
2234 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2237 SilcServer server = (SilcServer)context;
2238 SilcSocketConnection sock = parser_context->sock;
2239 SilcIDListData idata = (SilcIDListData)sock->user_data;
2242 idata->psn_receive = parser_context->packet->sequence + 1;
2244 /* If protocol for this connection is key exchange or rekey then we'll
2245 process all packets synchronously, since there might be packets in
2246 queue that we are not able to decrypt without first processing the
2247 packets before them. */
2248 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2249 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2250 (sock->protocol && sock->protocol->protocol &&
2251 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2252 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2253 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2256 /* Reprocess data since we'll return FALSE here. This is because
2257 the idata->receive_key might have become valid in the last packet
2258 and we want to call this processor with valid cipher. */
2260 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2261 TRUE : FALSE, idata->receive_key,
2262 idata->hmac_receive, idata->psn_receive,
2263 silc_server_packet_parse, server);
2265 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2266 TRUE : FALSE, NULL, NULL, 0,
2267 silc_server_packet_parse, server);
2271 switch (sock->type) {
2272 case SILC_SOCKET_TYPE_UNKNOWN:
2273 case SILC_SOCKET_TYPE_CLIENT:
2274 /* Parse the packet with timeout */
2275 silc_schedule_task_add(server->schedule, sock->sock,
2276 silc_server_packet_parse_real,
2277 (void *)parser_context, 0, 100000,
2279 SILC_TASK_PRI_NORMAL);
2281 case SILC_SOCKET_TYPE_SERVER:
2282 case SILC_SOCKET_TYPE_ROUTER:
2283 /* Packets from servers are parsed immediately */
2284 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2294 /* Parses the packet type and calls what ever routines the packet type
2295 requires. This is done for all incoming packets. */
2297 void silc_server_packet_parse_type(SilcServer server,
2298 SilcSocketConnection sock,
2299 SilcPacketContext *packet)
2301 SilcPacketType type = packet->type;
2302 SilcIDListData idata = (SilcIDListData)sock->user_data;
2304 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2305 silc_get_packet_name(type), packet->flags));
2307 /* Parse the packet type */
2309 case SILC_PACKET_DISCONNECT:
2312 char *message = NULL;
2314 if (packet->flags & SILC_PACKET_FLAG_LIST)
2316 if (packet->buffer->len < 1)
2319 status = (SilcStatus)packet->buffer->data[0];
2320 if (packet->buffer->len > 1 &&
2321 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2322 message = silc_memdup(packet->buffer->data + 1,
2323 packet->buffer->len - 1);
2325 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2326 sock->ip, sock->hostname,
2327 silc_get_status_message(status), status,
2328 message ? message : ""));
2331 /* Handle the disconnection from our end too */
2332 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2333 silc_server_free_sock_user_data(server, sock, NULL);
2334 silc_server_close_connection(server, sock);
2338 case SILC_PACKET_SUCCESS:
2340 * Success received for something. For now we can have only
2341 * one protocol for connection executing at once hence this
2342 * success message is for whatever protocol is executing currently.
2344 if (packet->flags & SILC_PACKET_FLAG_LIST)
2347 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2350 case SILC_PACKET_FAILURE:
2352 * Failure received for something. For now we can have only
2353 * one protocol for connection executing at once hence this
2354 * failure message is for whatever protocol is executing currently.
2356 if (packet->flags & SILC_PACKET_FLAG_LIST)
2358 if (sock->protocol) {
2359 SilcServerFailureContext f;
2360 f = silc_calloc(1, sizeof(*f));
2364 /* We will wait 5 seconds to process this failure packet */
2365 silc_schedule_task_add(server->schedule, sock->sock,
2366 silc_server_failure_callback, (void *)f, 5, 0,
2367 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2371 case SILC_PACKET_REJECT:
2372 if (packet->flags & SILC_PACKET_FLAG_LIST)
2377 case SILC_PACKET_NOTIFY:
2379 * Received notify packet. Server can receive notify packets from
2380 * router. Server then relays the notify messages to clients if needed.
2382 if (packet->flags & SILC_PACKET_FLAG_LIST)
2383 silc_server_notify_list(server, sock, packet);
2385 silc_server_notify(server, sock, packet);
2391 case SILC_PACKET_CHANNEL_MESSAGE:
2393 * Received channel message. Channel messages are special packets
2394 * (although probably most common ones) thus they are handled
2397 if (packet->flags & SILC_PACKET_FLAG_LIST)
2399 idata->last_receive = time(NULL);
2400 silc_server_channel_message(server, sock, packet);
2403 case SILC_PACKET_CHANNEL_KEY:
2405 * Received key for channel. As channels are created by the router
2406 * the keys are as well. We will distribute the key to all of our
2407 * locally connected clients on the particular channel. Router
2408 * never receives this channel and thus is ignored.
2410 if (packet->flags & SILC_PACKET_FLAG_LIST)
2412 silc_server_channel_key(server, sock, packet);
2418 case SILC_PACKET_COMMAND:
2420 * Recived command. Processes the command request and allocates the
2421 * command context and calls the command.
2423 if (packet->flags & SILC_PACKET_FLAG_LIST)
2425 silc_server_command_process(server, sock, packet);
2428 case SILC_PACKET_COMMAND_REPLY:
2430 * Received command reply packet. Received command reply to command. It
2431 * may be reply to command sent by us or reply to command sent by client
2432 * that we've routed further.
2434 if (packet->flags & SILC_PACKET_FLAG_LIST)
2436 silc_server_command_reply(server, sock, packet);
2440 * Private Message packets
2442 case SILC_PACKET_PRIVATE_MESSAGE:
2444 * Received private message packet. The packet is coming from either
2447 if (packet->flags & SILC_PACKET_FLAG_LIST)
2449 idata->last_receive = time(NULL);
2450 silc_server_private_message(server, sock, packet);
2453 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2455 * Private message key packet.
2457 if (packet->flags & SILC_PACKET_FLAG_LIST)
2459 silc_server_private_message_key(server, sock, packet);
2463 * Key Exchange protocol packets
2465 case SILC_PACKET_KEY_EXCHANGE:
2466 if (packet->flags & SILC_PACKET_FLAG_LIST)
2469 if (sock->protocol && sock->protocol->protocol &&
2470 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2471 SilcServerKEInternalContext *proto_ctx =
2472 (SilcServerKEInternalContext *)sock->protocol->context;
2474 proto_ctx->packet = silc_packet_context_dup(packet);
2476 /* Let the protocol handle the packet */
2477 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2479 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2480 "protocol active, packet dropped."));
2484 case SILC_PACKET_KEY_EXCHANGE_1:
2485 if (packet->flags & SILC_PACKET_FLAG_LIST)
2488 if (sock->protocol && sock->protocol->protocol &&
2489 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2490 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2492 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2493 SilcServerRekeyInternalContext *proto_ctx =
2494 (SilcServerRekeyInternalContext *)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);
2501 /* Let the protocol handle the packet */
2502 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2504 SilcServerKEInternalContext *proto_ctx =
2505 (SilcServerKEInternalContext *)sock->protocol->context;
2507 if (proto_ctx->packet)
2508 silc_packet_context_free(proto_ctx->packet);
2510 proto_ctx->packet = silc_packet_context_dup(packet);
2511 proto_ctx->dest_id_type = packet->src_id_type;
2512 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2513 packet->src_id_type);
2514 if (!proto_ctx->dest_id)
2517 /* Let the protocol handle the packet */
2518 silc_protocol_execute(sock->protocol, server->schedule,
2522 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2523 "protocol active, packet dropped."));
2527 case SILC_PACKET_KEY_EXCHANGE_2:
2528 if (packet->flags & SILC_PACKET_FLAG_LIST)
2531 if (sock->protocol && sock->protocol->protocol &&
2532 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2533 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2535 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2536 SilcServerRekeyInternalContext *proto_ctx =
2537 (SilcServerRekeyInternalContext *)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);
2544 /* Let the protocol handle the packet */
2545 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2547 SilcServerKEInternalContext *proto_ctx =
2548 (SilcServerKEInternalContext *)sock->protocol->context;
2550 if (proto_ctx->packet)
2551 silc_packet_context_free(proto_ctx->packet);
2553 proto_ctx->packet = silc_packet_context_dup(packet);
2554 proto_ctx->dest_id_type = packet->src_id_type;
2555 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2556 packet->src_id_type);
2557 if (!proto_ctx->dest_id)
2560 /* Let the protocol handle the packet */
2561 silc_protocol_execute(sock->protocol, server->schedule,
2565 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2566 "protocol active, packet dropped."));
2570 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2572 * Connection authentication request packet. When we receive this packet
2573 * we will send to the other end information about our mandatory
2574 * authentication method for the connection. This packet maybe received
2577 if (packet->flags & SILC_PACKET_FLAG_LIST)
2579 silc_server_connection_auth_request(server, sock, packet);
2583 * Connection Authentication protocol packets
2585 case SILC_PACKET_CONNECTION_AUTH:
2586 /* Start of the authentication protocol. We receive here the
2587 authentication data and will verify it. */
2588 if (packet->flags & SILC_PACKET_FLAG_LIST)
2591 if (sock->protocol && sock->protocol->protocol->type
2592 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2594 SilcServerConnAuthInternalContext *proto_ctx =
2595 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2597 proto_ctx->packet = silc_packet_context_dup(packet);
2599 /* Let the protocol handle the packet */
2600 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2602 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2603 "protocol active, packet dropped."));
2607 case SILC_PACKET_NEW_ID:
2609 * Received New ID packet. This includes some new ID that has been
2610 * created. It may be for client, server or channel. This is the way
2611 * to distribute information about new registered entities in the
2614 if (packet->flags & SILC_PACKET_FLAG_LIST)
2615 silc_server_new_id_list(server, sock, packet);
2617 silc_server_new_id(server, sock, packet);
2620 case SILC_PACKET_NEW_CLIENT:
2622 * Received new client packet. This includes client information that
2623 * we will use to create initial client ID. After creating new
2624 * ID we will send it to the client.
2626 if (packet->flags & SILC_PACKET_FLAG_LIST)
2628 silc_server_new_client(server, sock, packet);
2631 case SILC_PACKET_NEW_SERVER:
2633 * Received new server packet. This includes Server ID and some other
2634 * information that we may save. This is received after server has
2637 if (packet->flags & SILC_PACKET_FLAG_LIST)
2639 silc_server_new_server(server, sock, packet);
2642 case SILC_PACKET_NEW_CHANNEL:
2644 * Received new channel packet. Information about new channel in the
2645 * network are distributed using this packet.
2647 if (packet->flags & SILC_PACKET_FLAG_LIST)
2648 silc_server_new_channel_list(server, sock, packet);
2650 silc_server_new_channel(server, sock, packet);
2653 case SILC_PACKET_HEARTBEAT:
2655 * Received heartbeat.
2657 if (packet->flags & SILC_PACKET_FLAG_LIST)
2661 case SILC_PACKET_KEY_AGREEMENT:
2663 * Received heartbeat.
2665 if (packet->flags & SILC_PACKET_FLAG_LIST)
2667 silc_server_key_agreement(server, sock, packet);
2670 case SILC_PACKET_REKEY:
2672 * Received re-key packet. The sender wants to regenerate the session
2675 if (packet->flags & SILC_PACKET_FLAG_LIST)
2677 silc_server_rekey(server, sock, packet);
2680 case SILC_PACKET_REKEY_DONE:
2682 * The re-key is done.
2684 if (packet->flags & SILC_PACKET_FLAG_LIST)
2687 if (sock->protocol && sock->protocol->protocol &&
2688 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2690 SilcServerRekeyInternalContext *proto_ctx =
2691 (SilcServerRekeyInternalContext *)sock->protocol->context;
2693 if (proto_ctx->packet)
2694 silc_packet_context_free(proto_ctx->packet);
2696 proto_ctx->packet = silc_packet_context_dup(packet);
2698 /* Let the protocol handle the packet */
2699 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2701 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2702 "protocol active, packet dropped."));
2706 case SILC_PACKET_FTP:
2708 if (packet->flags & SILC_PACKET_FLAG_LIST)
2710 silc_server_ftp(server, sock, packet);
2713 case SILC_PACKET_RESUME_CLIENT:
2715 if (packet->flags & SILC_PACKET_FLAG_LIST)
2717 silc_server_resume_client(server, sock, packet);
2720 case SILC_PACKET_RESUME_ROUTER:
2721 /* Resume router packet received. This packet is received for backup
2722 router resuming protocol. */
2723 if (packet->flags & SILC_PACKET_FLAG_LIST)
2725 silc_server_backup_resume_router(server, sock, packet);
2729 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2734 /* Creates connection to a remote router. */
2736 void silc_server_create_connection(SilcServer server,
2737 const char *remote_host, SilcUInt32 port)
2739 SilcServerConnection sconn;
2741 /* Allocate connection object for hold connection specific stuff. */
2742 sconn = silc_calloc(1, sizeof(*sconn));
2743 sconn->server = server;
2744 sconn->remote_host = strdup(remote_host);
2745 sconn->remote_port = port;
2746 sconn->no_reconnect = TRUE;
2748 silc_schedule_task_add(server->schedule, 0,
2749 silc_server_connect_router,
2750 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2751 SILC_TASK_PRI_NORMAL);
2754 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2756 silc_socket_free(context);
2759 /* Closes connection to socket connection */
2761 void silc_server_close_connection(SilcServer server,
2762 SilcSocketConnection sock)
2764 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2765 silc_schedule_task_add(server->schedule, 0,
2766 silc_server_close_connection_final,
2767 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2768 SILC_TASK_PRI_NORMAL);
2772 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2774 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2775 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2776 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2779 /* We won't listen for this connection anymore */
2780 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2782 /* Unregister all tasks */
2783 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2785 /* Close the actual connection */
2786 silc_net_close_connection(sock->sock);
2787 server->sockets[sock->sock] = NULL;
2789 /* If sock->user_data is NULL then we'll check for active protocols
2790 here since the silc_server_free_sock_user_data has not been called
2791 for this connection. */
2792 if (!sock->user_data) {
2793 /* If any protocol is active cancel its execution. It will call
2794 the final callback which will finalize the disconnection. */
2795 if (sock->protocol) {
2796 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2797 silc_protocol_cancel(sock->protocol, server->schedule);
2798 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2799 silc_protocol_execute_final(sock->protocol, server->schedule);
2800 sock->protocol = NULL;
2805 silc_schedule_task_add(server->schedule, 0,
2806 silc_server_close_connection_final,
2807 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2808 SILC_TASK_PRI_NORMAL);
2811 /* Sends disconnect message to remote connection and disconnects the
2814 void silc_server_disconnect_remote(SilcServer server,
2815 SilcSocketConnection sock,
2816 SilcStatus status, ...)
2819 unsigned char buf[512];
2827 memset(buf, 0, sizeof(buf));
2828 va_start(ap, status);
2829 cp = va_arg(ap, char *);
2831 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2836 SILC_LOG_DEBUG(("Disconnecting remote host"));
2838 /* Notify remote end that the conversation is over. The notify message
2839 is tried to be sent immediately. */
2843 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2845 buffer = silc_buffer_alloc_size(len);
2849 buffer->data[0] = status;
2851 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2853 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2854 buffer->data, buffer->len, TRUE);
2855 silc_buffer_free(buffer);
2858 silc_server_packet_queue_purge(server, sock);
2860 /* Mark the connection to be disconnected */
2861 SILC_SET_DISCONNECTED(sock);
2862 silc_server_close_connection(server, sock);
2867 SilcClientEntry client;
2868 } *FreeClientInternal;
2870 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2872 FreeClientInternal i = (FreeClientInternal)context;
2874 silc_idlist_del_data(i->client);
2875 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2879 /* Frees client data and notifies about client's signoff. */
2881 void silc_server_free_client_data(SilcServer server,
2882 SilcSocketConnection sock,
2883 SilcClientEntry client,
2885 const char *signoff)
2887 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2889 SILC_LOG_DEBUG(("Freeing client data"));
2892 if (!client->router && !client->connection &&
2893 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2894 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2895 SILC_LOG_ERROR(("****** Contact Pekka"));
2896 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2901 /* If there is pending outgoing data for the client then purge it
2902 to the network before removing the client entry. */
2903 silc_server_packet_queue_purge(server, sock);
2906 /* Check if anyone is watching this nickname */
2907 if (server->server_type == SILC_ROUTER)
2908 silc_server_check_watcher_list(server, client, NULL,
2909 SILC_NOTIFY_TYPE_SIGNOFF);
2911 /* Send SIGNOFF notify to routers. */
2913 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2914 SILC_BROADCAST(server), client->id,
2918 /* Remove client from all channels */
2920 silc_server_remove_from_channels(server, NULL, client,
2921 TRUE, (char *)signoff, TRUE);
2923 silc_server_remove_from_channels(server, NULL, client,
2924 FALSE, NULL, FALSE);
2926 /* Remove this client from watcher list if it is */
2927 silc_server_del_from_watcher_list(server, client);
2929 /* Update statistics */
2930 server->stat.my_clients--;
2931 server->stat.clients--;
2932 if (server->stat.cell_clients)
2933 server->stat.cell_clients--;
2934 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2935 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2936 silc_schedule_task_del_by_context(server->schedule, client);
2938 /* We will not delete the client entry right away. We will take it
2939 into history (for WHOWAS command) for 5 minutes */
2942 silc_schedule_task_add(server->schedule, 0,
2943 silc_server_free_client_data_timeout,
2945 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2946 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2948 client->router = NULL;
2949 client->connection = NULL;
2952 /* Frees user_data pointer from socket connection object. This also sends
2953 appropriate notify packets to the network to inform about leaving
2956 void silc_server_free_sock_user_data(SilcServer server,
2957 SilcSocketConnection sock,
2958 const char *signoff_message)
2960 switch (sock->type) {
2961 case SILC_SOCKET_TYPE_CLIENT:
2963 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2964 silc_server_free_client_data(server, sock, user_data, TRUE,
2968 case SILC_SOCKET_TYPE_SERVER:
2969 case SILC_SOCKET_TYPE_ROUTER:
2971 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2972 SilcServerEntry backup_router = NULL;
2974 SILC_LOG_DEBUG(("Freeing server data"));
2977 backup_router = silc_server_backup_get(server, user_data->id);
2979 /* If this was our primary router connection then we're lost to
2980 the outside world. */
2981 if (server->router == user_data) {
2982 /* Check whether we have a backup router connection */
2983 if (!backup_router || backup_router == user_data) {
2984 silc_schedule_task_add(server->schedule, 0,
2985 silc_server_connect_to_router,
2988 SILC_TASK_PRI_NORMAL);
2990 server->id_entry->router = NULL;
2991 server->router = NULL;
2992 server->standalone = TRUE;
2993 backup_router = NULL;
2995 if (server->id_entry != backup_router) {
2996 SILC_LOG_INFO(("New primary router is backup router %s",
2997 backup_router->server_name));
2998 server->id_entry->router = backup_router;
2999 server->router = backup_router;
3000 server->router_connect = time(0);
3001 server->backup_primary = TRUE;
3003 SILC_LOG_INFO(("We are now new primary router in this cell"));
3004 server->id_entry->router = NULL;
3005 server->router = NULL;
3006 server->standalone = TRUE;
3008 /* We stop here to take a breath */
3012 if (server->server_type == SILC_BACKUP_ROUTER) {
3013 server->server_type = SILC_ROUTER;
3015 /* We'll need to constantly try to reconnect to the primary
3016 router so that we'll see when it comes back online. */
3017 silc_server_backup_reconnect(server, sock->ip, sock->port,
3018 silc_server_backup_connected,
3022 /* Mark this connection as replaced */
3023 silc_server_backup_replaced_add(server, user_data->id,
3026 } else if (backup_router) {
3027 SILC_LOG_INFO(("Enabling the use of backup router %s",
3028 backup_router->server_name));
3029 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3030 backup_router->server_name));
3032 /* Mark this connection as replaced */
3033 silc_server_backup_replaced_add(server, user_data->id,
3037 if (!backup_router) {
3038 /* Remove all servers that are originated from this server, and
3039 remove the clients of those servers too. */
3040 silc_server_remove_servers_by_server(server, user_data, TRUE);
3042 /* Remove the clients that this server owns as they will become
3044 silc_server_remove_clients_by_server(server, user_data,
3047 /* Remove channels owned by this server */
3048 if (server->server_type == SILC_SERVER)
3049 silc_server_remove_channels_by_server(server, user_data);
3051 /* Enable local server connections that may be disabled */
3052 silc_server_local_servers_toggle_enabled(server, TRUE);
3054 /* Update the client entries of this server to the new backup
3055 router. If we are the backup router we also resolve the real
3056 servers for the clients. After updating is over this also
3057 removes the clients that this server explicitly owns. */
3058 silc_server_update_clients_by_server(server, user_data,
3059 backup_router, TRUE);
3061 /* If we are router and just lost our primary router (now standlaone)
3062 we remove everything that was behind it, since we don't know
3064 if (server->server_type == SILC_ROUTER && server->standalone)
3065 /* Remove all servers that are originated from this server, and
3066 remove the clients of those servers too. */
3067 silc_server_remove_servers_by_server(server, user_data, TRUE);
3069 /* Finally remove the clients that are explicitly owned by this
3070 server. They go down with the server. */
3071 silc_server_remove_clients_by_server(server, user_data,
3074 /* Update our server cache to use the new backup router too. */
3075 silc_server_update_servers_by_server(server, user_data, backup_router);
3076 if (server->server_type == SILC_SERVER)
3077 silc_server_update_channels_by_server(server, user_data,
3080 /* Send notify about primary router going down to local operators */
3081 if (server->backup_router)
3082 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3083 SILC_NOTIFY_TYPE_NONE,
3084 ("%s switched to backup router %s "
3085 "(we are primary router now)",
3086 server->server_name, server->server_name));
3088 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3089 SILC_NOTIFY_TYPE_NONE,
3090 ("%s switched to backup router %s",
3091 server->server_name,
3092 server->router->server_name));
3095 /* Free the server entry */
3096 silc_server_backup_del(server, user_data);
3097 silc_server_backup_replaced_del(server, user_data);
3098 silc_idlist_del_data(user_data);
3099 if (!silc_idlist_del_server(server->local_list, user_data))
3100 silc_idlist_del_server(server->global_list, user_data);
3101 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3102 server->stat.my_servers--;
3104 server->stat.my_routers--;
3105 server->stat.routers--;
3107 server->stat.servers--;
3108 if (server->server_type == SILC_ROUTER)
3109 server->stat.cell_servers--;
3111 if (backup_router && backup_router != server->id_entry) {
3112 /* Announce all of our stuff that was created about 5 minutes ago.
3113 The backup router knows all the other stuff already. */
3114 if (server->server_type == SILC_ROUTER)
3115 silc_server_announce_servers(server, FALSE, time(0) - 300,
3116 backup_router->connection);
3118 /* Announce our clients and channels to the router */
3119 silc_server_announce_clients(server, time(0) - 300,
3120 backup_router->connection);
3121 silc_server_announce_channels(server, time(0) - 300,
3122 backup_router->connection);
3128 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3130 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3132 silc_idlist_del_data(user_data);
3133 silc_free(user_data);
3138 /* If any protocol is active cancel its execution */
3139 if (sock->protocol) {
3140 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3141 silc_protocol_cancel(sock->protocol, server->schedule);
3142 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3143 silc_protocol_execute_final(sock->protocol, server->schedule);
3144 sock->protocol = NULL;
3147 sock->user_data = NULL;
3150 /* Removes client from all channels it has joined. This is used when client
3151 connection is disconnected. If the client on a channel is last, the
3152 channel is removed as well. This sends the SIGNOFF notify types. */
3154 void silc_server_remove_from_channels(SilcServer server,
3155 SilcSocketConnection sock,
3156 SilcClientEntry client,
3158 const char *signoff_message,
3161 SilcChannelEntry channel;
3162 SilcChannelClientEntry chl;
3163 SilcHashTableList htl;
3164 SilcBuffer clidp = NULL;
3169 SILC_LOG_DEBUG(("Removing client from joined channels"));
3171 if (notify && !client->id)
3175 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3180 /* Remove the client from all channels. The client is removed from
3181 the channels' user list. */
3182 silc_hash_table_list(client->channels, &htl);
3183 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3184 channel = chl->channel;
3186 /* Remove channel if this is last client leaving the channel, unless
3187 the channel is permanent. */
3188 if (server->server_type != SILC_SERVER &&
3189 silc_hash_table_count(channel->user_list) < 2) {
3190 silc_server_channel_delete(server, channel);
3194 silc_hash_table_del(client->channels, channel);
3195 silc_hash_table_del(channel->user_list, chl->client);
3196 channel->user_count--;
3198 /* If there is no global users on the channel anymore mark the channel
3199 as local channel. Do not check if the removed client is local client. */
3200 if (server->server_type == SILC_SERVER && channel->global_users &&
3201 chl->client->router && !silc_server_channel_has_global(channel))
3202 channel->global_users = FALSE;
3206 /* Update statistics */
3207 if (SILC_IS_LOCAL(client))
3208 server->stat.my_chanclients--;
3209 if (server->server_type == SILC_ROUTER) {
3210 server->stat.cell_chanclients--;
3211 server->stat.chanclients--;
3214 /* If there is not at least one local user on the channel then we don't
3215 need the channel entry anymore, we can remove it safely, unless the
3216 channel is permanent channel */
3217 if (server->server_type == SILC_SERVER &&
3218 !silc_server_channel_has_local(channel)) {
3219 /* Notify about leaving client if this channel has global users. */
3220 if (notify && channel->global_users)
3221 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3222 SILC_NOTIFY_TYPE_SIGNOFF,
3223 signoff_message ? 2 : 1,
3224 clidp->data, clidp->len,
3225 signoff_message, signoff_message ?
3226 strlen(signoff_message) : 0);
3228 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3229 silc_server_channel_delete(server, channel);
3233 /* Send notify to channel about client leaving SILC and channel too */
3235 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3236 SILC_NOTIFY_TYPE_SIGNOFF,
3237 signoff_message ? 2 : 1,
3238 clidp->data, clidp->len,
3239 signoff_message, signoff_message ?
3240 strlen(signoff_message) : 0);
3242 /* Don't create keys if we are shutting down */
3243 if (server->server_shutdown)
3246 /* Re-generate channel key if needed */
3247 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3248 if (!silc_server_create_channel_key(server, channel, 0))
3251 /* Send the channel key to the channel. The key of course is not sent
3252 to the client who was removed from the channel. */
3253 silc_server_send_channel_key(server, client->connection, channel,
3254 server->server_type == SILC_ROUTER ?
3255 FALSE : !server->standalone);
3259 silc_hash_table_list_reset(&htl);
3261 silc_buffer_free(clidp);
3264 /* Removes client from one channel. This is used for example when client
3265 calls LEAVE command to remove itself from the channel. Returns TRUE
3266 if channel still exists and FALSE if the channel is removed when
3267 last client leaves the channel. If `notify' is FALSE notify messages
3270 bool silc_server_remove_from_one_channel(SilcServer server,
3271 SilcSocketConnection sock,
3272 SilcChannelEntry channel,
3273 SilcClientEntry client,
3276 SilcChannelClientEntry chl;
3279 SILC_LOG_DEBUG(("Removing %s from channel %s",
3280 silc_id_render(client->id, SILC_ID_CLIENT),
3281 channel->channel_name));
3283 /* Get the entry to the channel, if this client is not on the channel
3285 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3288 /* Remove channel if this is last client leaving the channel, unless
3289 the channel is permanent. */
3290 if (server->server_type != SILC_SERVER &&
3291 silc_hash_table_count(channel->user_list) < 2) {
3292 silc_server_channel_delete(server, channel);
3296 silc_hash_table_del(client->channels, chl->channel);
3297 silc_hash_table_del(channel->user_list, chl->client);
3298 channel->user_count--;
3300 /* If there is no global users on the channel anymore mark the channel
3301 as local channel. Do not check if the client is local client. */
3302 if (server->server_type == SILC_SERVER && channel->global_users &&
3303 chl->client->router && !silc_server_channel_has_global(channel))
3304 channel->global_users = FALSE;
3308 /* Update statistics */
3309 if (SILC_IS_LOCAL(client))
3310 server->stat.my_chanclients--;
3311 if (server->server_type == SILC_ROUTER) {
3312 server->stat.cell_chanclients--;
3313 server->stat.chanclients--;
3316 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3320 /* If there is not at least one local user on the channel then we don't
3321 need the channel entry anymore, we can remove it safely, unless the
3322 channel is permanent channel */
3323 if (server->server_type == SILC_SERVER &&
3324 !silc_server_channel_has_local(channel)) {
3325 /* Notify about leaving client if this channel has global users. */
3326 if (notify && channel->global_users)
3327 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3328 SILC_NOTIFY_TYPE_LEAVE, 1,
3329 clidp->data, clidp->len);
3331 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3332 silc_server_channel_delete(server, channel);
3333 silc_buffer_free(clidp);
3337 /* Send notify to channel about client leaving the channel */
3339 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3340 SILC_NOTIFY_TYPE_LEAVE, 1,
3341 clidp->data, clidp->len);
3343 silc_buffer_free(clidp);
3347 /* Timeout callback. This is called if connection is idle or for some
3348 other reason is not responding within some period of time. This
3349 disconnects the remote end. */
3351 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3353 SilcServer server = (SilcServer)context;
3354 SilcSocketConnection sock = server->sockets[fd];
3355 SilcProtocolType protocol = 0;
3357 SILC_LOG_DEBUG(("Start"));
3362 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3363 sock->hostname, sock->ip));
3365 /* If we have protocol active we must assure that we call the protocol's
3366 final callback so that all the memory is freed. */
3367 if (sock->protocol) {
3368 protocol = sock->protocol->protocol->type;
3369 silc_protocol_cancel(sock->protocol, server->schedule);
3370 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3371 silc_protocol_execute_final(sock->protocol, server->schedule);
3372 sock->protocol = NULL;
3376 if (sock->user_data)
3377 silc_server_free_sock_user_data(server, sock, NULL);
3379 silc_server_disconnect_remote(server, sock,
3381 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3382 SILC_STATUS_ERR_AUTH_FAILED :
3383 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3384 "Connection timeout");
3387 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3388 function may be used only by router. In real SILC network all channels
3389 are created by routers thus this function is never used by normal
3392 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3393 SilcServerID *router_id,
3399 SilcChannelID *channel_id;
3400 SilcChannelEntry entry;
3404 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3407 cipher = SILC_DEFAULT_CIPHER;
3409 hmac = SILC_DEFAULT_HMAC;
3411 /* Allocate cipher */
3412 if (!silc_cipher_alloc(cipher, &key))
3416 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3417 silc_cipher_free(key);
3421 channel_name = strdup(channel_name);
3423 /* Create the channel ID */
3424 if (!silc_id_create_channel_id(server, router_id, server->rng,
3426 silc_free(channel_name);
3427 silc_cipher_free(key);
3428 silc_hmac_free(newhmac);
3432 /* Create the channel */
3433 entry = silc_idlist_add_channel(server->local_list, channel_name,
3434 SILC_CHANNEL_MODE_NONE, channel_id,
3435 NULL, key, newhmac, 0);
3437 silc_free(channel_name);
3438 silc_cipher_free(key);
3439 silc_hmac_free(newhmac);
3440 silc_free(channel_id);
3444 entry->cipher = strdup(cipher);
3445 entry->hmac_name = strdup(hmac);
3447 /* Now create the actual key material */
3448 if (!silc_server_create_channel_key(server, entry,
3449 silc_cipher_get_key_len(key) / 8)) {
3450 silc_idlist_del_channel(server->local_list, entry);
3454 /* Notify other routers about the new channel. We send the packet
3455 to our primary route. */
3457 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3458 channel_name, entry->id,
3459 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3462 /* Distribute to backup routers */
3463 if (broadcast && server->server_type == SILC_ROUTER) {
3466 SilcUInt32 name_len = strlen(channel_name);
3467 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3468 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3470 packet = silc_channel_payload_encode(channel_name, name_len,
3471 cid, channel_id_len, entry->mode);
3472 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3473 packet->data, packet->len, FALSE, TRUE);
3475 silc_buffer_free(packet);
3478 server->stat.my_channels++;
3479 if (server->server_type == SILC_ROUTER) {
3480 server->stat.channels++;
3481 server->stat.cell_channels++;
3482 entry->users_resolved = TRUE;
3488 /* Same as above but creates the channel with Channel ID `channel_id. */
3491 silc_server_create_new_channel_with_id(SilcServer server,
3495 SilcChannelID *channel_id,
3498 SilcChannelEntry entry;
3502 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3505 cipher = SILC_DEFAULT_CIPHER;
3507 hmac = SILC_DEFAULT_HMAC;
3509 /* Allocate cipher */
3510 if (!silc_cipher_alloc(cipher, &key))
3514 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3515 silc_cipher_free(key);
3519 channel_name = strdup(channel_name);
3521 /* Create the channel */
3522 entry = silc_idlist_add_channel(server->local_list, channel_name,
3523 SILC_CHANNEL_MODE_NONE, channel_id,
3524 NULL, key, newhmac, 0);
3526 silc_cipher_free(key);
3527 silc_hmac_free(newhmac);
3528 silc_free(channel_name);
3532 /* Now create the actual key material */
3533 if (!silc_server_create_channel_key(server, entry,
3534 silc_cipher_get_key_len(key) / 8)) {
3535 silc_idlist_del_channel(server->local_list, entry);
3539 /* Notify other routers about the new channel. We send the packet
3540 to our primary route. */
3542 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3543 channel_name, entry->id,
3544 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3547 /* Distribute to backup routers */
3548 if (broadcast && server->server_type == SILC_ROUTER) {
3551 SilcUInt32 name_len = strlen(channel_name);
3552 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3553 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3555 packet = silc_channel_payload_encode(channel_name, name_len,
3556 cid, channel_id_len, entry->mode);
3557 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3558 packet->data, packet->len, FALSE, TRUE);
3560 silc_buffer_free(packet);
3563 server->stat.my_channels++;
3564 if (server->server_type == SILC_ROUTER) {
3565 server->stat.channels++;
3566 server->stat.cell_channels++;
3567 entry->users_resolved = TRUE;
3573 /* Channel's key re-key timeout callback. */
3575 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3577 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3578 SilcServer server = (SilcServer)rekey->context;
3582 /* Return now if we are shutting down */
3583 if (server->server_shutdown)
3586 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3589 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3592 /* Generates new channel key. This is used to create the initial channel key
3593 but also to re-generate new key for channel. If `key_len' is provided
3594 it is the bytes of the key length. */
3596 bool silc_server_create_channel_key(SilcServer server,
3597 SilcChannelEntry channel,
3601 unsigned char channel_key[32], hash[32];
3604 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3605 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3609 SILC_LOG_DEBUG(("Generating channel %s key", channel->channel_name));
3611 if (!channel->channel_key)
3612 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3613 channel->channel_key = NULL;
3619 else if (channel->key_len)
3620 len = channel->key_len / 8;
3622 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3624 /* Create channel key */
3625 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3628 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3630 /* Remove old key if exists */
3632 memset(channel->key, 0, channel->key_len / 8);
3633 silc_free(channel->key);
3637 channel->key_len = len * 8;
3638 channel->key = silc_memdup(channel_key, len);
3639 memset(channel_key, 0, sizeof(channel_key));
3641 /* Generate HMAC key from the channel key data and set it */
3643 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3644 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3645 silc_hmac_set_key(channel->hmac, hash,
3646 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3647 memset(hash, 0, sizeof(hash));
3649 if (server->server_type == SILC_ROUTER) {
3650 if (!channel->rekey)
3651 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3652 channel->rekey->context = (void *)server;
3653 channel->rekey->channel = channel;
3654 channel->rekey->key_len = key_len;
3655 if (channel->rekey->task)
3656 silc_schedule_task_del(server->schedule, channel->rekey->task);
3658 channel->rekey->task =
3659 silc_schedule_task_add(server->schedule, 0,
3660 silc_server_channel_key_rekey,
3661 (void *)channel->rekey,
3662 server->config->channel_rekey_secs, 0,
3664 SILC_TASK_PRI_NORMAL);
3670 /* Saves the channel key found in the encoded `key_payload' buffer. This
3671 function is used when we receive Channel Key Payload and also when we're
3672 processing JOIN command reply. Returns entry to the channel. */
3674 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3675 SilcBuffer key_payload,
3676 SilcChannelEntry channel)
3678 SilcChannelKeyPayload payload = NULL;
3679 SilcChannelID *id = NULL;
3680 unsigned char *tmp, hash[32];
3684 /* Decode channel key payload */
3685 payload = silc_channel_key_payload_parse(key_payload->data,
3688 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3693 /* Get the channel entry */
3696 /* Get channel ID */
3697 tmp = silc_channel_key_get_id(payload, &tmp_len);
3698 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3704 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3706 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3708 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3709 silc_id_render(id, SILC_ID_CHANNEL)));
3716 SILC_LOG_DEBUG(("Saving new channel %s key", channel->channel_name));
3718 tmp = silc_channel_key_get_key(payload, &tmp_len);
3724 cipher = silc_channel_key_get_cipher(payload, NULL);
3730 /* Remove old key if exists */
3732 memset(channel->key, 0, channel->key_len / 8);
3733 silc_free(channel->key);
3734 silc_cipher_free(channel->channel_key);
3737 /* Create new cipher */
3738 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3739 channel->channel_key = NULL;
3744 if (channel->cipher)
3745 silc_free(channel->cipher);
3746 channel->cipher = strdup(cipher);
3749 channel->key_len = tmp_len * 8;
3750 channel->key = silc_memdup(tmp, tmp_len);
3751 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3753 /* Generate HMAC key from the channel key data and set it */
3755 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3756 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3757 silc_hmac_set_key(channel->hmac, hash,
3758 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3760 memset(hash, 0, sizeof(hash));
3761 memset(tmp, 0, tmp_len);
3763 if (server->server_type == SILC_ROUTER) {
3764 if (!channel->rekey)
3765 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3766 channel->rekey->context = (void *)server;
3767 channel->rekey->channel = channel;
3768 if (channel->rekey->task)
3769 silc_schedule_task_del(server->schedule, channel->rekey->task);
3771 channel->rekey->task =
3772 silc_schedule_task_add(server->schedule, 0,
3773 silc_server_channel_key_rekey,
3774 (void *)channel->rekey,
3775 server->config->channel_rekey_secs, 0,
3777 SILC_TASK_PRI_NORMAL);
3783 silc_channel_key_payload_free(payload);
3788 /* Heartbeat callback. This function is set as argument for the
3789 silc_socket_set_heartbeat function. The library will call this function
3790 at the set time interval. */
3792 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3795 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3797 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3799 /* Send the heartbeat */
3800 silc_server_send_heartbeat(hb->server, sock);
3803 /* Returns assembled of all servers in the given ID list. The packet's
3804 form is dictated by the New ID payload. */
3806 static void silc_server_announce_get_servers(SilcServer server,
3807 SilcServerEntry remote,
3809 SilcBuffer *servers,
3810 unsigned long creation_time)
3812 SilcIDCacheList list;
3813 SilcIDCacheEntry id_cache;
3814 SilcServerEntry entry;
3817 /* Go through all clients in the list */
3818 if (silc_idcache_get_all(id_list->servers, &list)) {
3819 if (silc_idcache_list_first(list, &id_cache)) {
3821 entry = (SilcServerEntry)id_cache->context;
3823 /* Do not announce the one we've sending our announcements and
3824 do not announce ourself. Also check the creation time if it's
3826 if ((entry == remote) || (entry == server->id_entry) ||
3827 (creation_time && entry->data.created < creation_time)) {
3828 if (!silc_idcache_list_next(list, &id_cache))
3833 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3835 *servers = silc_buffer_realloc(*servers,
3837 (*servers)->truelen + idp->len :
3839 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3840 silc_buffer_put(*servers, idp->data, idp->len);
3841 silc_buffer_pull(*servers, idp->len);
3842 silc_buffer_free(idp);
3844 if (!silc_idcache_list_next(list, &id_cache))
3849 silc_idcache_list_free(list);
3854 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3860 p = silc_notify_payload_encode(notify, argc, ap);
3866 /* This function is used by router to announce existing servers to our
3867 primary router when we've connected to it. If `creation_time' is non-zero
3868 then only the servers that has been created after the `creation_time'
3869 will be announced. */
3871 void silc_server_announce_servers(SilcServer server, bool global,
3872 unsigned long creation_time,
3873 SilcSocketConnection remote)
3875 SilcBuffer servers = NULL;
3877 SILC_LOG_DEBUG(("Announcing servers"));
3879 /* Get servers in local list */
3880 silc_server_announce_get_servers(server, remote->user_data,
3881 server->local_list, &servers,
3885 /* Get servers in global list */
3886 silc_server_announce_get_servers(server, remote->user_data,
3887 server->global_list, &servers,
3891 silc_buffer_push(servers, servers->data - servers->head);
3892 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3894 /* Send the packet */
3895 silc_server_packet_send(server, remote,
3896 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3897 servers->data, servers->len, TRUE);
3899 silc_buffer_free(servers);
3903 /* Returns assembled packet of all clients in the given ID list. The
3904 packet's form is dictated by the New ID Payload. */
3906 static void silc_server_announce_get_clients(SilcServer server,
3908 SilcBuffer *clients,
3910 unsigned long creation_time)
3912 SilcIDCacheList list;
3913 SilcIDCacheEntry id_cache;
3914 SilcClientEntry client;
3917 unsigned char mode[4];
3919 /* Go through all clients in the list */
3920 if (silc_idcache_get_all(id_list->clients, &list)) {
3921 if (silc_idcache_list_first(list, &id_cache)) {
3923 client = (SilcClientEntry)id_cache->context;
3925 if (creation_time && client->data.created < creation_time) {
3926 if (!silc_idcache_list_next(list, &id_cache))
3931 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3933 *clients = silc_buffer_realloc(*clients,
3935 (*clients)->truelen + idp->len :
3937 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3938 silc_buffer_put(*clients, idp->data, idp->len);
3939 silc_buffer_pull(*clients, idp->len);
3941 SILC_PUT32_MSB(client->mode, mode);
3943 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3944 2, idp->data, idp->len,
3946 *umodes = silc_buffer_realloc(*umodes,
3948 (*umodes)->truelen + tmp->len :
3950 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3951 silc_buffer_put(*umodes, tmp->data, tmp->len);
3952 silc_buffer_pull(*umodes, tmp->len);
3953 silc_buffer_free(tmp);
3955 silc_buffer_free(idp);
3957 if (!silc_idcache_list_next(list, &id_cache))
3962 silc_idcache_list_free(list);
3966 /* This function is used to announce our existing clients to our router
3967 when we've connected to it. If `creation_time' is non-zero then only
3968 the clients that has been created after the `creation_time' will be
3971 void silc_server_announce_clients(SilcServer server,
3972 unsigned long creation_time,
3973 SilcSocketConnection remote)
3975 SilcBuffer clients = NULL;
3976 SilcBuffer umodes = NULL;
3978 SILC_LOG_DEBUG(("Announcing clients"));
3980 /* Get clients in local list */
3981 silc_server_announce_get_clients(server, server->local_list,
3982 &clients, &umodes, creation_time);
3984 /* As router we announce our global list as well */
3985 if (server->server_type == SILC_ROUTER)
3986 silc_server_announce_get_clients(server, server->global_list,
3987 &clients, &umodes, creation_time);
3990 silc_buffer_push(clients, clients->data - clients->head);
3991 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3993 /* Send the packet */
3994 silc_server_packet_send(server, remote,
3995 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3996 clients->data, clients->len, TRUE);
3998 silc_buffer_free(clients);
4002 silc_buffer_push(umodes, umodes->data - umodes->head);
4003 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
4005 /* Send the packet */
4006 silc_server_packet_send(server, remote,
4007 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4008 umodes->data, umodes->len, TRUE);
4010 silc_buffer_free(umodes);
4014 /* Returns channel's topic for announcing it */
4016 void silc_server_announce_get_channel_topic(SilcServer server,
4017 SilcChannelEntry channel,
4022 if (channel->topic) {
4023 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4024 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
4025 chidp->data, chidp->len,
4027 strlen(channel->topic));
4028 silc_buffer_free(chidp);
4032 /* Returns assembled packets for channel users of the `channel'. */
4034 void silc_server_announce_get_channel_users(SilcServer server,
4035 SilcChannelEntry channel,
4036 SilcBuffer *channel_modes,
4037 SilcBuffer *channel_users,
4038 SilcBuffer *channel_users_modes)
4040 SilcChannelClientEntry chl;
4041 SilcHashTableList htl;
4042 SilcBuffer chidp, clidp, csidp;
4045 unsigned char mode[4], *fkey = NULL;
4046 SilcUInt32 fkey_len = 0;
4049 SILC_LOG_DEBUG(("Start"));
4051 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4052 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4055 SILC_PUT32_MSB(channel->mode, mode);
4056 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4057 if (channel->founder_key)
4058 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4060 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4061 6, csidp->data, csidp->len,
4064 hmac, hmac ? strlen(hmac) : 0,
4065 channel->passphrase,
4066 channel->passphrase ?
4067 strlen(channel->passphrase) : 0,
4071 silc_buffer_realloc(*channel_modes,
4073 (*channel_modes)->truelen + len : len));
4074 silc_buffer_pull_tail(*channel_modes,
4075 ((*channel_modes)->end -
4076 (*channel_modes)->data));
4077 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4078 silc_buffer_pull(*channel_modes, len);
4079 silc_buffer_free(tmp);
4084 /* Now find all users on the channel */
4085 silc_hash_table_list(channel->user_list, &htl);
4086 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4087 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4090 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4091 clidp->data, clidp->len,
4092 chidp->data, chidp->len);
4095 silc_buffer_realloc(*channel_users,
4097 (*channel_users)->truelen + len : len));
4098 silc_buffer_pull_tail(*channel_users,
4099 ((*channel_users)->end -
4100 (*channel_users)->data));
4102 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4103 silc_buffer_pull(*channel_users, len);
4104 silc_buffer_free(tmp);
4106 /* CUMODE notify for mode change on the channel */
4107 SILC_PUT32_MSB(chl->mode, mode);
4108 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4109 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4110 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4111 4, csidp->data, csidp->len,
4113 clidp->data, clidp->len,
4116 *channel_users_modes =
4117 silc_buffer_realloc(*channel_users_modes,
4118 (*channel_users_modes ?
4119 (*channel_users_modes)->truelen + len : len));
4120 silc_buffer_pull_tail(*channel_users_modes,
4121 ((*channel_users_modes)->end -
4122 (*channel_users_modes)->data));
4124 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4125 silc_buffer_pull(*channel_users_modes, len);
4126 silc_buffer_free(tmp);
4130 silc_buffer_free(clidp);
4132 silc_hash_table_list_reset(&htl);
4133 silc_buffer_free(chidp);
4134 silc_buffer_free(csidp);
4137 /* Returns assembled packets for all channels and users on those channels
4138 from the given ID List. The packets are in the form dictated by the
4139 New Channel and New Channel User payloads. */
4141 void silc_server_announce_get_channels(SilcServer server,
4143 SilcBuffer *channels,
4144 SilcBuffer **channel_modes,
4145 SilcBuffer *channel_users,
4146 SilcBuffer **channel_users_modes,
4147 SilcUInt32 *channel_users_modes_c,
4148 SilcBuffer **channel_topics,
4149 SilcChannelID ***channel_ids,
4150 unsigned long creation_time)
4152 SilcIDCacheList list;
4153 SilcIDCacheEntry id_cache;
4154 SilcChannelEntry channel;
4157 SilcUInt16 name_len;
4159 int i = *channel_users_modes_c;
4162 SILC_LOG_DEBUG(("Start"));
4164 /* Go through all channels in the list */
4165 if (silc_idcache_get_all(id_list->channels, &list)) {
4166 if (silc_idcache_list_first(list, &id_cache)) {
4168 channel = (SilcChannelEntry)id_cache->context;
4170 if (creation_time && channel->created < creation_time)
4175 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4176 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4177 name_len = strlen(channel->channel_name);
4180 len = 4 + name_len + id_len + 4;
4182 silc_buffer_realloc(*channels,
4183 (*channels ? (*channels)->truelen +
4185 silc_buffer_pull_tail(*channels,
4186 ((*channels)->end - (*channels)->data));
4187 silc_buffer_format(*channels,
4188 SILC_STR_UI_SHORT(name_len),
4189 SILC_STR_UI_XNSTRING(channel->channel_name,
4191 SILC_STR_UI_SHORT(id_len),
4192 SILC_STR_UI_XNSTRING(cid, id_len),
4193 SILC_STR_UI_INT(channel->mode),
4195 silc_buffer_pull(*channels, len);
4198 if (creation_time && channel->updated < creation_time)
4204 /* Channel user modes */
4205 *channel_users_modes = silc_realloc(*channel_users_modes,
4206 sizeof(**channel_users_modes) *
4208 (*channel_users_modes)[i] = NULL;
4209 *channel_modes = silc_realloc(*channel_modes,
4210 sizeof(**channel_modes) * (i + 1));
4211 (*channel_modes)[i] = NULL;
4212 *channel_ids = silc_realloc(*channel_ids,
4213 sizeof(**channel_ids) * (i + 1));
4214 (*channel_ids)[i] = NULL;
4215 silc_server_announce_get_channel_users(server, channel,
4216 &(*channel_modes)[i],
4218 &(*channel_users_modes)[i]);
4219 (*channel_ids)[i] = channel->id;
4221 /* Channel's topic */
4222 *channel_topics = silc_realloc(*channel_topics,
4223 sizeof(**channel_topics) * (i + 1));
4224 (*channel_topics)[i] = NULL;
4225 silc_server_announce_get_channel_topic(server, channel,
4226 &(*channel_topics)[i]);
4227 (*channel_users_modes_c)++;
4231 if (!silc_idcache_list_next(list, &id_cache))
4236 silc_idcache_list_free(list);
4240 /* This function is used to announce our existing channels to our router
4241 when we've connected to it. This also announces the users on the
4242 channels to the router. If the `creation_time' is non-zero only the
4243 channels that was created after the `creation_time' are announced.
4244 Note that the channel users are still announced even if the `creation_time'
4247 void silc_server_announce_channels(SilcServer server,
4248 unsigned long creation_time,
4249 SilcSocketConnection remote)
4251 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4252 SilcBuffer *channel_users_modes = NULL;
4253 SilcBuffer *channel_topics = NULL;
4254 SilcUInt32 channel_users_modes_c = 0;
4255 SilcChannelID **channel_ids = NULL;
4257 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4259 /* Get channels and channel users in local list */
4260 silc_server_announce_get_channels(server, server->local_list,
4261 &channels, &channel_modes,
4263 &channel_users_modes,
4264 &channel_users_modes_c,
4266 &channel_ids, creation_time);
4268 /* Get channels and channel users in global list */
4269 if (server->server_type != SILC_SERVER)
4270 silc_server_announce_get_channels(server, server->global_list,
4271 &channels, &channel_modes,
4273 &channel_users_modes,
4274 &channel_users_modes_c,
4276 &channel_ids, creation_time);
4279 silc_buffer_push(channels, channels->data - channels->head);
4280 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4282 /* Send the packet */
4283 silc_server_packet_send(server, remote,
4284 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4285 channels->data, channels->len,
4288 silc_buffer_free(channels);
4291 if (channel_users) {
4292 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4293 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4294 channel_users->len);
4296 /* Send the packet */
4297 silc_server_packet_send(server, remote,
4298 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4299 channel_users->data, channel_users->len,
4302 silc_buffer_free(channel_users);
4305 if (channel_modes) {
4308 for (i = 0; i < channel_users_modes_c; i++) {
4309 if (!channel_modes[i])
4311 silc_buffer_push(channel_modes[i],
4312 channel_modes[i]->data -
4313 channel_modes[i]->head);
4314 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4315 channel_modes[i]->len);
4316 silc_server_packet_send_dest(server, remote,
4317 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4318 channel_ids[i], SILC_ID_CHANNEL,
4319 channel_modes[i]->data,
4320 channel_modes[i]->len,
4322 silc_buffer_free(channel_modes[i]);
4324 silc_free(channel_modes);
4327 if (channel_users_modes) {
4330 for (i = 0; i < channel_users_modes_c; i++) {
4331 if (!channel_users_modes[i])
4333 silc_buffer_push(channel_users_modes[i],
4334 channel_users_modes[i]->data -
4335 channel_users_modes[i]->head);
4336 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4337 channel_users_modes[i]->len);
4338 silc_server_packet_send_dest(server, remote,
4339 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4340 channel_ids[i], SILC_ID_CHANNEL,
4341 channel_users_modes[i]->data,
4342 channel_users_modes[i]->len,
4344 silc_buffer_free(channel_users_modes[i]);
4346 silc_free(channel_users_modes);
4349 if (channel_topics) {
4352 for (i = 0; i < channel_users_modes_c; i++) {
4353 if (!channel_topics[i])
4356 silc_buffer_push(channel_topics[i],
4357 channel_topics[i]->data -
4358 channel_topics[i]->head);
4359 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4360 channel_topics[i]->len);
4361 silc_server_packet_send_dest(server, remote,
4362 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4363 channel_ids[i], SILC_ID_CHANNEL,
4364 channel_topics[i]->data,
4365 channel_topics[i]->len,
4367 silc_buffer_free(channel_topics[i]);
4369 silc_free(channel_topics);
4372 silc_free(channel_ids);
4375 /* Failure timeout callback. If this is called then we will immediately
4376 process the received failure. We always process the failure with timeout
4377 since we do not want to blindly trust to received failure packets.
4378 This won't be called (the timeout is cancelled) if the failure was
4379 bogus (it is bogus if remote does not close the connection after sending
4382 SILC_TASK_CALLBACK(silc_server_failure_callback)
4384 SilcServerFailureContext f = (SilcServerFailureContext)context;
4386 if (f->sock->protocol) {
4387 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4388 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4394 /* Assembles user list and users mode list from the `channel'. */
4396 bool silc_server_get_users_on_channel(SilcServer server,
4397 SilcChannelEntry channel,
4398 SilcBuffer *user_list,
4399 SilcBuffer *mode_list,
4400 SilcUInt32 *user_count)
4402 SilcChannelClientEntry chl;
4403 SilcHashTableList htl;
4404 SilcBuffer client_id_list;
4405 SilcBuffer client_mode_list;
4407 SilcUInt32 list_count = 0, len = 0;
4409 if (!silc_hash_table_count(channel->user_list))
4412 silc_hash_table_list(channel->user_list, &htl);
4413 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4414 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4415 silc_hash_table_list_reset(&htl);
4417 client_id_list = silc_buffer_alloc(len);
4419 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4420 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4421 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4423 silc_hash_table_list(channel->user_list, &htl);
4424 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4426 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4427 silc_buffer_put(client_id_list, idp->data, idp->len);
4428 silc_buffer_pull(client_id_list, idp->len);
4429 silc_buffer_free(idp);
4431 /* Client's mode on channel */
4432 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4433 silc_buffer_pull(client_mode_list, 4);
4437 silc_hash_table_list_reset(&htl);
4438 silc_buffer_push(client_id_list,
4439 client_id_list->data - client_id_list->head);
4440 silc_buffer_push(client_mode_list,
4441 client_mode_list->data - client_mode_list->head);
4443 *user_list = client_id_list;
4444 *mode_list = client_mode_list;
4445 *user_count = list_count;
4449 /* Saves users and their modes to the `channel'. */
4451 void silc_server_save_users_on_channel(SilcServer server,
4452 SilcSocketConnection sock,
4453 SilcChannelEntry channel,
4454 SilcClientID *noadd,
4455 SilcBuffer user_list,
4456 SilcBuffer mode_list,
4457 SilcUInt32 user_count)
4462 SilcClientID *client_id;
4463 SilcClientEntry client;
4464 SilcIDCacheEntry cache;
4465 SilcChannelClientEntry chl;
4468 SILC_LOG_DEBUG(("Start"));
4470 for (i = 0; i < user_count; i++) {
4472 SILC_GET16_MSB(idp_len, user_list->data + 2);
4474 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4475 silc_buffer_pull(user_list, idp_len);
4480 SILC_GET32_MSB(mode, mode_list->data);
4481 silc_buffer_pull(mode_list, 4);
4483 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4484 silc_free(client_id);
4490 /* Check if we have this client cached already. */
4491 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4492 server->server_type, &cache);
4494 client = silc_idlist_find_client_by_id(server->global_list,
4495 client_id, server->server_type,
4500 /* If router did not find such Client ID in its lists then this must
4501 be bogus client or some router in the net is buggy. */
4502 if (server->server_type == SILC_ROUTER) {
4503 silc_free(client_id);
4507 /* We don't have that client anywhere, add it. The client is added
4508 to global list since server didn't have it in the lists so it must be
4510 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4511 silc_id_dup(client_id, SILC_ID_CLIENT),
4512 sock->user_data, NULL, 0);
4514 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4515 silc_free(client_id);
4519 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4521 /* Found, if it is from global list we'll assure that we won't
4522 expire it now that the entry is on channel. */
4527 silc_free(client_id);
4529 if (!silc_server_client_on_channel(client, channel, &chl)) {
4530 /* Client was not on the channel, add it. */
4531 chl = silc_calloc(1, sizeof(*chl));
4532 chl->client = client;
4534 chl->channel = channel;
4535 silc_hash_table_add(channel->user_list, chl->client, chl);
4536 silc_hash_table_add(client->channels, chl->channel, chl);
4537 channel->user_count++;
4545 /* Saves channels and channels user modes to the `client'. Removes
4546 the client from those channels that are not sent in the list but
4549 void silc_server_save_user_channels(SilcServer server,
4550 SilcSocketConnection sock,
4551 SilcClientEntry client,
4552 SilcBuffer channels,
4553 SilcBuffer channels_user_modes)
4556 SilcUInt32 *chumodes;
4557 SilcChannelPayload entry;
4558 SilcChannelEntry channel;
4559 SilcChannelID *channel_id;
4560 SilcChannelClientEntry chl;
4561 SilcHashTable ht = NULL;
4562 SilcHashTableList htl;
4566 if (!channels ||!channels_user_modes)
4569 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4570 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4572 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4573 NULL, NULL, NULL, TRUE);
4574 silc_dlist_start(ch);
4575 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4576 /* Check if we have this channel, and add it if we don't have it.
4577 Also add the client on the channel unless it is there already. */
4578 channel_id = silc_channel_get_id_parse(entry);
4579 channel = silc_idlist_find_channel_by_id(server->local_list,
4582 channel = silc_idlist_find_channel_by_id(server->global_list,
4585 if (server->server_type != SILC_SERVER) {
4586 silc_free(channel_id);
4591 /* We don't have that channel anywhere, add it. */
4592 name = silc_channel_get_name(entry, NULL);
4593 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4594 channel_id, server->router,
4597 silc_free(channel_id);
4604 channel->mode = silc_channel_get_mode(entry);
4606 /* Add the client on the channel */
4607 if (!silc_server_client_on_channel(client, channel, &chl)) {
4608 chl = silc_calloc(1, sizeof(*chl));
4609 chl->client = client;
4610 chl->mode = chumodes[i++];
4611 chl->channel = channel;
4612 silc_hash_table_add(channel->user_list, chl->client, chl);
4613 silc_hash_table_add(client->channels, chl->channel, chl);
4614 channel->user_count++;
4617 chl->mode = chumodes[i++];
4620 silc_hash_table_add(ht, channel, channel);
4621 silc_free(channel_id);
4623 silc_channel_payload_list_free(ch);
4624 silc_free(chumodes);
4628 /* Go through the list again and remove client from channels that
4629 are no part of the list. */
4631 silc_hash_table_list(client->channels, &htl);
4632 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4633 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4634 silc_hash_table_del(chl->channel->user_list, chl->client);
4635 silc_hash_table_del(chl->client->channels, chl->channel);
4639 silc_hash_table_list_reset(&htl);
4640 silc_hash_table_free(ht);
4642 silc_hash_table_list(client->channels, &htl);
4643 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4644 silc_hash_table_del(chl->channel->user_list, chl->client);
4645 silc_hash_table_del(chl->client->channels, chl->channel);
4648 silc_hash_table_list_reset(&htl);
4652 /* Lookups route to the client indicated by the `id_data'. The connection
4653 object and internal data object is returned. Returns NULL if route
4654 could not be found to the client. If the `client_id' is specified then
4655 it is used and the `id_data' is ignored. */
4657 SilcSocketConnection
4658 silc_server_get_client_route(SilcServer server,
4659 unsigned char *id_data,
4661 SilcClientID *client_id,
4662 SilcIDListData *idata,
4663 SilcClientEntry *client_entry)
4666 SilcClientEntry client;
4668 SILC_LOG_DEBUG(("Start"));
4671 *client_entry = NULL;
4673 /* Decode destination Client ID */
4675 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4677 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4681 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4684 /* If the destination belongs to our server we don't have to route
4685 the packet anywhere but to send it to the local destination. */
4686 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4690 /* If we are router and the client has router then the client is in
4691 our cell but not directly connected to us. */
4692 if (server->server_type == SILC_ROUTER && client->router) {
4693 /* We are of course in this case the client's router thus the route
4694 to the client is the server who owns the client. So, we will send
4695 the packet to that server. */
4697 *idata = (SilcIDListData)client->router;
4698 return client->router->connection;
4701 /* Seems that client really is directly connected to us */
4703 *idata = (SilcIDListData)client;
4705 *client_entry = client;
4706 return client->connection;
4709 /* Destination belongs to someone not in this server. If we are normal
4710 server our action is to send the packet to our router. */
4711 if (server->server_type != SILC_ROUTER && !server->standalone) {
4714 *idata = (SilcIDListData)server->router;
4715 return SILC_PRIMARY_ROUTE(server);
4718 /* We are router and we will perform route lookup for the destination
4719 and send the packet to fastest route. */
4720 if (server->server_type == SILC_ROUTER && !server->standalone) {
4721 /* Check first that the ID is valid */
4722 client = silc_idlist_find_client_by_id(server->global_list, id,
4725 SilcSocketConnection dst_sock;
4727 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4731 *idata = (SilcIDListData)dst_sock->user_data;
4740 /* Encodes and returns channel list of channels the `client' has joined.
4741 Secret channels are not put to the list. */
4743 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4744 SilcClientEntry client,
4747 SilcBuffer *user_mode_list)
4749 SilcBuffer buffer = NULL;
4750 SilcChannelEntry channel;
4751 SilcChannelClientEntry chl;
4752 SilcHashTableList htl;
4755 SilcUInt16 name_len;
4759 *user_mode_list = NULL;
4761 silc_hash_table_list(client->channels, &htl);
4762 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4763 channel = chl->channel;
4765 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4767 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4770 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4771 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4772 name_len = strlen(channel->channel_name);
4774 len = 4 + name_len + id_len + 4;
4775 buffer = silc_buffer_realloc(buffer,
4776 (buffer ? buffer->truelen + len : len));
4777 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4778 silc_buffer_format(buffer,
4779 SILC_STR_UI_SHORT(name_len),
4780 SILC_STR_UI_XNSTRING(channel->channel_name,
4782 SILC_STR_UI_SHORT(id_len),
4783 SILC_STR_UI_XNSTRING(cid, id_len),
4784 SILC_STR_UI_INT(chl->channel->mode),
4786 silc_buffer_pull(buffer, len);
4789 if (user_mode_list) {
4790 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4792 (*user_mode_list)->truelen + 4 :
4794 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4795 (*user_mode_list)->data));
4796 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4797 silc_buffer_pull(*user_mode_list, 4);
4800 silc_hash_table_list_reset(&htl);
4803 silc_buffer_push(buffer, buffer->data - buffer->head);
4804 if (user_mode_list && *user_mode_list)
4805 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4806 (*user_mode_list)->head));
4811 /* Finds client entry by Client ID and if it is not found then resolves
4812 it using WHOIS command. */
4814 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4815 SilcClientID *client_id,
4816 bool always_resolve,
4819 SilcClientEntry client;
4824 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4827 client = silc_idlist_find_client_by_id(server->global_list,
4828 client_id, TRUE, NULL);
4829 if (!client && server->server_type == SILC_ROUTER)
4833 if (!client && server->standalone)
4836 if (!client || !client->nickname || !client->username ||
4838 SilcBuffer buffer, idp;
4841 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4842 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4843 client->resolve_cmd_ident = ++server->cmd_ident;
4846 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4847 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4848 server->cmd_ident, 1,
4849 4, idp->data, idp->len);
4850 silc_server_packet_send(server, client ? client->router->connection :
4851 SILC_PRIMARY_ROUTE(server),
4852 SILC_PACKET_COMMAND, 0,
4853 buffer->data, buffer->len, FALSE);
4854 silc_buffer_free(idp);
4855 silc_buffer_free(buffer);
4866 /* A timeout callback for the re-key. We will be the initiator of the
4869 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4871 SilcSocketConnection sock = (SilcSocketConnection)context;
4872 SilcIDListData idata = (SilcIDListData)sock->user_data;
4873 SilcServer server = (SilcServer)idata->rekey->context;
4874 SilcProtocol protocol;
4875 SilcServerRekeyInternalContext *proto_ctx;
4877 /* Allocate internal protocol context. This is sent as context
4879 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4880 proto_ctx->server = (void *)server;
4881 proto_ctx->sock = sock;
4882 proto_ctx->responder = FALSE;
4883 proto_ctx->pfs = idata->rekey->pfs;
4885 /* Perform rekey protocol. Will call the final callback after the
4886 protocol is over. */
4887 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4888 &protocol, proto_ctx, silc_server_rekey_final);
4889 sock->protocol = protocol;
4891 /* Run the protocol */
4892 silc_protocol_execute(protocol, server->schedule, 0, 0);
4894 SILC_LOG_DEBUG(("Rekey protocol completed"));
4896 /* Re-register re-key timeout */
4897 silc_schedule_task_add(server->schedule, sock->sock,
4898 silc_server_rekey_callback,
4899 context, idata->rekey->timeout, 0,
4900 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4903 /* The final callback for the REKEY protocol. This will actually take the
4904 new key material into use. */
4906 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4908 SilcProtocol protocol = (SilcProtocol)context;
4909 SilcServerRekeyInternalContext *ctx =
4910 (SilcServerRekeyInternalContext *)protocol->context;
4911 SilcServer server = (SilcServer)ctx->server;
4912 SilcSocketConnection sock = ctx->sock;
4914 SILC_LOG_DEBUG(("Start"));
4916 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4917 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4918 /* Error occured during protocol */
4919 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4920 silc_protocol_cancel(protocol, server->schedule);
4921 silc_protocol_free(protocol);
4922 sock->protocol = NULL;
4924 silc_packet_context_free(ctx->packet);
4926 silc_ske_free(ctx->ske);
4931 /* Purge the outgoing data queue to assure that all rekey packets really
4932 go to the network before we quit the protocol. */
4933 silc_server_packet_queue_purge(server, sock);
4936 silc_protocol_free(protocol);
4937 sock->protocol = NULL;
4939 silc_packet_context_free(ctx->packet);
4941 silc_ske_free(ctx->ske);
4945 /* Task callback used to retrieve network statistical information from
4946 router server once in a while. */
4948 SILC_TASK_CALLBACK(silc_server_get_stats)
4950 SilcServer server = (SilcServer)context;
4951 SilcBuffer idp, packet;
4953 SILC_LOG_DEBUG(("Retrieving stats from router"));
4955 if (!server->standalone) {
4956 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4957 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4958 ++server->cmd_ident, 1,
4959 1, idp->data, idp->len);
4960 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4961 SILC_PACKET_COMMAND, 0, packet->data,
4962 packet->len, FALSE);
4963 silc_buffer_free(packet);
4964 silc_buffer_free(idp);
4967 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4968 server, 120, 0, SILC_TASK_TIMEOUT,