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 /* Close all connections */
672 for (i = 0; i < server->config->param.connections_max; i++) {
673 if (!server->sockets[i])
675 if (!SILC_IS_LISTENER(server->sockets[i])) {
676 SilcIDListData idata = server->sockets[i]->user_data;
679 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
681 silc_schedule_task_del_by_context(server->schedule,
683 silc_server_disconnect_remote(server, server->sockets[i],
685 "Server is shutting down");
687 silc_socket_free(server->sockets[i]);
688 server->sockets[i] = NULL;
692 /* We are not connected to network anymore */
693 server->standalone = TRUE;
695 silc_schedule_stop(server->schedule);
696 silc_schedule_uninit(server->schedule);
697 server->schedule = NULL;
699 silc_free(server->sockets);
700 server->sockets = NULL;
703 silc_server_protocols_unregister();
705 SILC_LOG_DEBUG(("Server stopped"));
708 /* Function that is called when the network connection to a router has
709 been established. This will continue with the key exchange protocol
710 with the remote router. */
712 void silc_server_start_key_exchange(SilcServer server,
713 SilcServerConnection sconn,
716 SilcSocketConnection newsocket;
717 SilcProtocol protocol;
718 SilcServerKEInternalContext *proto_ctx;
719 SilcServerConfigRouter *conn =
720 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
723 /* Cancel any possible retry timeouts */
724 silc_schedule_task_del_by_callback(server->schedule,
725 silc_server_connect_to_router_retry);
727 /* Set socket options */
728 silc_net_set_socket_nonblock(sock);
729 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
731 /* Create socket connection for the connection. Even though we
732 know that we are connecting to a router we will mark the socket
733 to be unknown connection until we have executed authentication
735 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
736 server->sockets[sock] = newsocket;
737 newsocket->hostname = strdup(sconn->remote_host);
738 newsocket->ip = strdup(sconn->remote_host);
739 newsocket->port = sconn->remote_port;
740 sconn->sock = newsocket;
742 /* Allocate internal protocol context. This is sent as context
744 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
745 proto_ctx->server = (void *)server;
746 proto_ctx->context = (void *)sconn;
747 proto_ctx->sock = newsocket;
748 proto_ctx->rng = server->rng;
749 proto_ctx->responder = FALSE;
751 /* Set Key Exchange flags from configuration, but fall back to global
753 SILC_GET_SKE_FLAGS(conn, proto_ctx);
754 if (server->config->param.key_exchange_pfs)
755 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
757 /* Perform key exchange protocol. silc_server_connect_to_router_second
758 will be called after the protocol is finished. */
759 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
760 &protocol, proto_ctx,
761 silc_server_connect_to_router_second);
762 newsocket->protocol = protocol;
764 /* Register a timeout task that will be executed if the protocol
765 is not executed within set limit. */
766 proto_ctx->timeout_task =
767 silc_schedule_task_add(server->schedule, sock,
768 silc_server_timeout_remote,
769 server, server->config->key_exchange_timeout, 0,
773 /* Register the connection for network input and output. This sets
774 that scheduler will listen for incoming packets for this connection
775 and sets that outgoing packets may be sent to this connection as
776 well. However, this doesn't set the scheduler for outgoing traffic,
777 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
778 later when outgoing data is available. */
779 context = (void *)server;
780 SILC_REGISTER_CONNECTION_FOR_IO(sock);
782 /* Run the protocol */
783 silc_protocol_execute(protocol, server->schedule, 0, 0);
786 /* Timeout callback that will be called to retry connecting to remote
787 router. This is used by both normal and router server. This will wait
788 before retrying the connecting. The timeout is generated by exponential
789 backoff algorithm. */
791 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
793 SilcServerConnection sconn = (SilcServerConnection)context;
794 SilcServer server = sconn->server;
795 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
796 SilcServerConfigConnParams *param =
797 (conn->param ? conn->param : &server->config->param);
799 SILC_LOG_INFO(("Retrying connecting to a router"));
801 /* Calculate next timeout */
802 if (sconn->retry_count >= 1) {
803 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
804 if (sconn->retry_timeout > param->reconnect_interval_max)
805 sconn->retry_timeout = param->reconnect_interval_max;
807 sconn->retry_timeout = param->reconnect_interval;
809 sconn->retry_count++;
810 sconn->retry_timeout = sconn->retry_timeout +
811 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
813 /* If we've reached max retry count, give up. */
814 if ((sconn->retry_count > param->reconnect_count) &&
815 !param->reconnect_keep_trying) {
816 SILC_LOG_ERROR(("Could not connect to router, giving up"));
817 silc_server_config_unref(&sconn->conn);
818 silc_free(sconn->remote_host);
819 silc_free(sconn->backup_replace_ip);
824 SILC_LOG_DEBUG(("Retrying connecting to a router in %d seconds",
825 sconn->retry_timeout));
827 /* We will lookup a fresh pointer later */
828 silc_server_config_unref(&sconn->conn);
830 /* Wait one before retrying */
831 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
832 context, sconn->retry_timeout, 0,
833 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
836 /* Generic routine to use connect to a router. */
838 SILC_TASK_CALLBACK(silc_server_connect_router)
840 SilcServerConnection sconn = (SilcServerConnection)context;
841 SilcServer server = sconn->server;
842 SilcServerConfigRouter *rconn;
845 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
846 (sconn->backup ? "backup router" : "router"),
847 sconn->remote_host, sconn->remote_port));
849 server->router_connect = time(NULL);
850 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
853 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
854 (sconn->backup ? "backup router" : "router"),
855 sconn->remote_host, sconn->remote_port));
856 silc_free(sconn->remote_host);
857 silc_free(sconn->backup_replace_ip);
861 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
863 /* Connect to remote host */
864 sock = silc_net_create_connection(
865 (!server->config->server_info->primary ? NULL :
866 server->config->server_info->primary->server_ip),
867 sconn->remote_port, sconn->remote_host);
869 SILC_LOG_ERROR(("Could not connect to router %s:%d",
870 sconn->remote_host, sconn->remote_port));
871 if (!sconn->no_reconnect)
872 silc_schedule_task_add(server->schedule, 0,
873 silc_server_connect_to_router_retry,
874 context, 0, 1, SILC_TASK_TIMEOUT,
875 SILC_TASK_PRI_NORMAL);
877 silc_server_config_unref(&sconn->conn);
881 /* Continue with key exchange protocol */
882 silc_server_start_key_exchange(server, sconn, sock);
885 /* This function connects to our primary router or if we are a router this
886 establishes all our primary routes. This is called at the start of the
887 server to do authentication and key exchange with our router - called
890 SILC_TASK_CALLBACK(silc_server_connect_to_router)
892 SilcServer server = (SilcServer)context;
893 SilcServerConnection sconn;
894 SilcServerConfigRouter *ptr;
896 SILC_LOG_DEBUG(("We are %s",
897 (server->server_type == SILC_SERVER ?
898 "normal server" : server->server_type == SILC_ROUTER ?
899 "router" : "backup router/normal server")));
901 if (!server->config->routers) {
902 /* There wasn't a configured router, we will continue but we don't
903 have a connection to outside world. We will be standalone server. */
904 SILC_LOG_DEBUG(("No router(s), we are standalone"));
905 server->standalone = TRUE;
909 /* Cancel any possible retry timeouts */
910 silc_schedule_task_del_by_callback(server->schedule,
911 silc_server_connect_router);
912 silc_schedule_task_del_by_callback(server->schedule,
913 silc_server_connect_to_router_retry);
915 /* Create the connections to all our routes */
916 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
918 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
919 ptr->backup_router ? "Backup router" : "Router",
920 ptr->initiator ? "Initiator" : "Responder",
921 ptr->host, ptr->port));
923 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
924 ptr->initiator == FALSE && !server->backup_router)
925 server->wait_backup = TRUE;
927 if (ptr->initiator) {
928 /* Check whether we are connected to this host already */
929 if (silc_server_num_sockets_by_remote(server,
930 silc_net_is_ip(ptr->host) ?
932 silc_net_is_ip(ptr->host) ?
933 NULL : ptr->host, ptr->port,
934 SILC_SOCKET_TYPE_ROUTER)) {
935 SILC_LOG_DEBUG(("We are already connected to this router"));
939 /* Allocate connection object for hold connection specific stuff. */
940 sconn = silc_calloc(1, sizeof(*sconn));
941 sconn->server = server;
942 sconn->remote_host = strdup(ptr->host);
943 sconn->remote_port = ptr->port;
944 sconn->backup = ptr->backup_router;
946 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
947 sconn->backup_replace_port = ptr->backup_replace_port;
950 if (!server->router_conn && !sconn->backup)
951 server->router_conn = sconn;
953 silc_schedule_task_add(server->schedule, 0,
954 silc_server_connect_router,
955 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
956 SILC_TASK_PRI_NORMAL);
961 /* Second part of connecting to router(s). Key exchange protocol has been
962 executed and now we will execute authentication protocol. */
964 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
966 SilcProtocol protocol = (SilcProtocol)context;
967 SilcServerKEInternalContext *ctx =
968 (SilcServerKEInternalContext *)protocol->context;
969 SilcServer server = (SilcServer)ctx->server;
970 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
971 SilcSocketConnection sock = ctx->sock;
972 SilcServerConnAuthInternalContext *proto_ctx;
973 SilcServerConfigRouter *conn = NULL;
975 SILC_LOG_DEBUG(("Start"));
977 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
978 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
979 /* Error occured during protocol */
980 silc_protocol_free(protocol);
981 sock->protocol = NULL;
982 silc_ske_free_key_material(ctx->keymat);
984 silc_packet_context_free(ctx->packet);
986 silc_ske_free(ctx->ske);
987 silc_free(ctx->dest_id);
989 silc_schedule_task_del_by_callback(server->schedule,
990 silc_server_failure_callback);
991 silc_server_disconnect_remote(server, sock,
992 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
994 /* Try reconnecting if configuration wants it */
995 if (!sconn->no_reconnect) {
996 silc_schedule_task_add(server->schedule, 0,
997 silc_server_connect_to_router_retry,
998 sconn, 0, 1, SILC_TASK_TIMEOUT,
999 SILC_TASK_PRI_NORMAL);
1003 /* Call completion to indicate error */
1004 if (sconn->callback)
1005 (*sconn->callback)(server, NULL, sconn->callback_context);
1007 silc_server_config_unref(&sconn->conn);
1008 silc_free(sconn->remote_host);
1009 silc_free(sconn->backup_replace_ip);
1014 /* We now have the key material as the result of the key exchange
1015 protocol. Take the key material into use. Free the raw key material
1016 as soon as we've set them into use. */
1017 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1018 ctx->sock, ctx->keymat,
1019 ctx->ske->prop->cipher,
1020 ctx->ske->prop->pkcs,
1021 ctx->ske->prop->hash,
1022 ctx->ske->prop->hmac,
1023 ctx->ske->prop->group,
1025 silc_protocol_free(protocol);
1026 sock->protocol = NULL;
1027 silc_ske_free_key_material(ctx->keymat);
1029 silc_packet_context_free(ctx->packet);
1031 silc_ske_free(ctx->ske);
1032 silc_free(ctx->dest_id);
1034 silc_schedule_task_del_by_callback(server->schedule,
1035 silc_server_failure_callback);
1036 silc_server_disconnect_remote(server, sock,
1037 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1039 /* Try reconnecting if configuration wants it */
1040 if (!sconn->no_reconnect) {
1041 silc_schedule_task_add(server->schedule, 0,
1042 silc_server_connect_to_router_retry,
1043 sconn, 0, 1, SILC_TASK_TIMEOUT,
1044 SILC_TASK_PRI_NORMAL);
1048 /* Call completion to indicate error */
1049 if (sconn->callback)
1050 (*sconn->callback)(server, NULL, sconn->callback_context);
1052 silc_server_config_unref(&sconn->conn);
1053 silc_free(sconn->remote_host);
1054 silc_free(sconn->backup_replace_ip);
1058 silc_ske_free_key_material(ctx->keymat);
1060 /* Allocate internal context for the authentication protocol. This
1061 is sent as context for the protocol. */
1062 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1063 proto_ctx->server = (void *)server;
1064 proto_ctx->context = (void *)sconn;
1065 proto_ctx->sock = sock;
1066 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1067 proto_ctx->dest_id_type = ctx->dest_id_type;
1068 proto_ctx->dest_id = ctx->dest_id;
1070 /* Resolve the authentication method used in this connection. Check if
1071 we find a match from user configured connections */
1072 if (!sconn->conn.ref_ptr)
1073 conn = silc_server_config_find_router_conn(server, sock->hostname,
1076 conn = sconn->conn.ref_ptr;
1079 /* Match found. Use the configured authentication method. Take only
1080 the passphrase, since for public key auth we automatically use
1081 our local key pair. */
1082 if (conn->passphrase) {
1083 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1084 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1086 proto_ctx->auth_data = strdup(conn->passphrase);
1087 proto_ctx->auth_data_len = strlen(conn->passphrase);
1088 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1090 } else if (conn->publickeys) {
1091 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1093 proto_ctx->auth_meth = SILC_AUTH_NONE;
1096 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1097 sock->hostname, sock->ip, sock->port));
1098 silc_protocol_free(protocol);
1099 sock->protocol = NULL;
1101 silc_packet_context_free(ctx->packet);
1103 silc_ske_free(ctx->ske);
1104 silc_free(ctx->dest_id);
1106 silc_server_config_unref(&sconn->conn);
1107 silc_free(sconn->remote_host);
1108 silc_free(sconn->backup_replace_ip);
1110 silc_schedule_task_del_by_callback(server->schedule,
1111 silc_server_failure_callback);
1112 silc_server_disconnect_remote(server, sock,
1113 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1117 /* Free old protocol as it is finished now */
1118 silc_protocol_free(protocol);
1120 silc_packet_context_free(ctx->packet);
1122 sock->protocol = NULL;
1124 /* Allocate the authentication protocol. This is allocated here
1125 but we won't start it yet. We will be receiving party of this
1126 protocol thus we will wait that connecting party will make
1127 their first move. */
1128 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1129 &sock->protocol, proto_ctx,
1130 silc_server_connect_to_router_final);
1132 /* Register timeout task. If the protocol is not executed inside
1133 this timelimit the connection will be terminated. */
1134 proto_ctx->timeout_task =
1135 silc_schedule_task_add(server->schedule, sock->sock,
1136 silc_server_timeout_remote,
1138 server->config->conn_auth_timeout, 0,
1142 /* Run the protocol */
1143 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1146 /* Finalizes the connection to router. Registers a server task to the
1147 queue so that we can accept new connections. */
1149 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1151 SilcProtocol protocol = (SilcProtocol)context;
1152 SilcServerConnAuthInternalContext *ctx =
1153 (SilcServerConnAuthInternalContext *)protocol->context;
1154 SilcServer server = (SilcServer)ctx->server;
1155 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1156 SilcSocketConnection sock = ctx->sock;
1157 SilcServerEntry id_entry = NULL;
1159 SilcServerHBContext hb_context;
1160 unsigned char *id_string;
1162 SilcIDListData idata;
1163 SilcServerConfigRouter *conn = NULL;
1164 SilcServerConfigConnParams *param = NULL;
1166 SILC_LOG_DEBUG(("Start"));
1168 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1169 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1170 /* Error occured during protocol */
1171 silc_free(ctx->dest_id);
1172 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1175 /* Try reconnecting if configuration wants it */
1176 if (!sconn->no_reconnect) {
1177 silc_schedule_task_add(server->schedule, 0,
1178 silc_server_connect_to_router_retry,
1179 sconn, 0, 1, SILC_TASK_TIMEOUT,
1180 SILC_TASK_PRI_NORMAL);
1187 /* Add a task to the queue. This task receives new connections to the
1188 server. This task remains on the queue until the end of the program. */
1189 if (!server->listenning && !sconn->backup) {
1190 silc_schedule_task_add(server->schedule, server->sock,
1191 silc_server_accept_new_connection,
1192 (void *)server, 0, 0,
1194 SILC_TASK_PRI_NORMAL);
1195 server->listenning = TRUE;
1198 /* Send NEW_SERVER packet to the router. We will become registered
1199 to the SILC network after sending this packet. */
1200 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1201 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1202 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1203 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1204 silc_buffer_format(packet,
1205 SILC_STR_UI_SHORT(id_len),
1206 SILC_STR_UI_XNSTRING(id_string, id_len),
1207 SILC_STR_UI_SHORT(strlen(server->server_name)),
1208 SILC_STR_UI_XNSTRING(server->server_name,
1209 strlen(server->server_name)),
1212 /* Send the packet */
1213 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1214 packet->data, packet->len, TRUE);
1215 silc_buffer_free(packet);
1216 silc_free(id_string);
1218 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1220 /* Check that we do not have this ID already */
1221 id_entry = silc_idlist_find_server_by_id(server->local_list,
1222 ctx->dest_id, TRUE, NULL);
1224 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1226 id_entry = silc_idlist_find_server_by_id(server->global_list,
1227 ctx->dest_id, TRUE, NULL);
1229 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1232 SILC_LOG_DEBUG(("New server id(%s)",
1233 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1235 /* Add the connected router to global server list */
1236 id_entry = silc_idlist_add_server(server->global_list,
1237 strdup(sock->hostname),
1238 SILC_ROUTER, ctx->dest_id, NULL, sock);
1240 silc_free(ctx->dest_id);
1241 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1242 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1247 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1248 silc_free(sock->user_data);
1249 sock->user_data = (void *)id_entry;
1250 sock->type = SILC_SOCKET_TYPE_ROUTER;
1251 idata = (SilcIDListData)sock->user_data;
1252 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1253 SILC_IDLIST_STATUS_LOCAL);
1255 conn = sconn->conn.ref_ptr;
1256 param = &server->config->param;
1257 if (conn && conn->param)
1258 param = conn->param;
1260 /* Perform keepalive. The `hb_context' will be freed automatically
1261 when finally calling the silc_socket_free function. */
1262 hb_context = silc_calloc(1, sizeof(*hb_context));
1263 hb_context->server = server;
1264 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1265 silc_server_perform_heartbeat,
1268 /* Register re-key timeout */
1269 idata->rekey->timeout = param->key_exchange_rekey;
1270 idata->rekey->context = (void *)server;
1271 silc_schedule_task_add(server->schedule, sock->sock,
1272 silc_server_rekey_callback,
1273 (void *)sock, idata->rekey->timeout, 0,
1274 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1276 if (!sconn->backup) {
1277 /* Mark this router our primary router if we're still standalone */
1278 if (server->standalone) {
1279 server->id_entry->router = id_entry;
1280 server->router = id_entry;
1281 server->standalone = FALSE;
1283 /* If we are router then announce our possible servers. */
1284 if (server->server_type == SILC_ROUTER)
1285 silc_server_announce_servers(server, FALSE, 0,
1286 SILC_PRIMARY_ROUTE(server));
1288 /* Announce our clients and channels to the router */
1289 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1290 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1292 /* If we are backup router then this primary router is whom we are
1294 if (server->server_type == SILC_BACKUP_ROUTER)
1295 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1298 /* Add this server to be our backup router */
1299 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1300 sconn->backup_replace_port, FALSE);
1303 sock->protocol = NULL;
1306 /* Call the completion callback to indicate that we've connected to
1308 if (sconn->callback)
1309 (*sconn->callback)(server, id_entry, sconn->callback_context);
1311 /* Free the temporary connection data context */
1313 silc_server_config_unref(&sconn->conn);
1314 silc_free(sconn->remote_host);
1315 silc_free(sconn->backup_replace_ip);
1318 if (sconn == server->router_conn)
1319 server->router_conn = NULL;
1322 /* Free the protocol object */
1323 if (sock->protocol == protocol)
1324 sock->protocol = NULL;
1325 silc_protocol_free(protocol);
1327 silc_packet_context_free(ctx->packet);
1329 silc_ske_free(ctx->ske);
1330 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1331 silc_free(ctx->auth_data);
1335 /* Host lookup callback that is called after the incoming connection's
1336 IP and FQDN lookup is performed. This will actually check the acceptance
1337 of the incoming connection and will register the key exchange protocol
1338 for this connection. */
1341 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1344 SilcServerKEInternalContext *proto_ctx =
1345 (SilcServerKEInternalContext *)context;
1346 SilcServer server = (SilcServer)proto_ctx->server;
1347 SilcServerConfigClient *cconfig = NULL;
1348 SilcServerConfigServer *sconfig = NULL;
1349 SilcServerConfigRouter *rconfig = NULL;
1350 SilcServerConfigDeny *deny;
1353 context = (void *)server;
1355 /* Check whether we could resolve both IP and FQDN. */
1356 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1357 server->config->require_reverse_lookup)) {
1358 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1359 sock->hostname ? sock->hostname :
1360 sock->ip ? sock->ip : ""));
1361 server->stat.conn_failures++;
1362 silc_server_disconnect_remote(server, sock,
1363 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1364 "Unknown host or IP");
1365 silc_free(proto_ctx);
1369 /* Register the connection for network input and output. This sets
1370 that scheduler will listen for incoming packets for this connection
1371 and sets that outgoing packets may be sent to this connection as well.
1372 However, this doesn't set the scheduler for outgoing traffic, it
1373 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1374 later when outgoing data is available. */
1375 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1377 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1380 /* Listenning port */
1381 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1382 silc_server_disconnect_remote(server, sock,
1383 SILC_STATUS_ERR_RESOURCE_LIMIT,
1384 "Connection refused");
1385 server->stat.conn_failures++;
1386 silc_free(proto_ctx);
1389 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1391 /* Check whether this connection is denied to connect to us. */
1392 deny = silc_server_config_find_denied(server, sock->ip);
1394 deny = silc_server_config_find_denied(server, sock->hostname);
1396 /* The connection is denied */
1397 SILC_LOG_INFO(("Connection %s (%s) is denied",
1398 sock->hostname, sock->ip));
1399 silc_server_disconnect_remote(server, sock,
1400 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1402 server->stat.conn_failures++;
1403 silc_free(proto_ctx);
1407 /* Check whether we have configured this sort of connection at all. We
1408 have to check all configurations since we don't know what type of
1409 connection this is. */
1410 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1411 cconfig = silc_server_config_find_client(server, sock->hostname);
1412 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1413 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1414 if (server->server_type == SILC_ROUTER) {
1415 if (!(rconfig = silc_server_config_find_router_conn(server,
1416 sock->ip, sock->port)))
1417 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1420 if (!cconfig && !sconfig && !rconfig) {
1421 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1423 silc_server_disconnect_remote(server, sock,
1424 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1425 server->stat.conn_failures++;
1426 silc_free(proto_ctx);
1430 /* The connection is allowed */
1432 /* Set internal context for key exchange protocol. This is
1433 sent as context for the protocol. */
1434 proto_ctx->sock = sock;
1435 proto_ctx->rng = server->rng;
1436 proto_ctx->responder = TRUE;
1437 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1438 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1439 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1441 /* Take flags for key exchange. Since we do not know what type of connection
1442 this is, we go through all found configurations and use the global ones
1443 as well. This will result always into strictest key exchange flags. */
1444 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1445 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1446 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1447 if (server->config->param.key_exchange_pfs)
1448 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1450 /* Prepare the connection for key exchange protocol. We allocate the
1451 protocol but will not start it yet. The connector will be the
1452 initiator of the protocol thus we will wait for initiation from
1453 there before we start the protocol. */
1454 server->stat.auth_attempts++;
1455 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1456 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1457 &sock->protocol, proto_ctx,
1458 silc_server_accept_new_connection_second);
1460 /* Register a timeout task that will be executed if the connector
1461 will not start the key exchange protocol within specified timeout
1462 and the connection will be closed. */
1463 proto_ctx->timeout_task =
1464 silc_schedule_task_add(server->schedule, sock->sock,
1465 silc_server_timeout_remote,
1467 server->config->key_exchange_timeout, 0,
1472 /* Accepts new connections to the server. Accepting new connections are
1473 done in three parts to make it async. */
1475 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1477 SilcServer server = (SilcServer)context;
1478 SilcSocketConnection newsocket;
1479 SilcServerKEInternalContext *proto_ctx;
1482 SILC_LOG_DEBUG(("Accepting new connection"));
1484 server->stat.conn_attempts++;
1486 sock = silc_net_accept_connection(fd);
1488 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1489 server->stat.conn_failures++;
1493 /* Check for maximum allowed connections */
1494 if (sock > server->config->param.connections_max) {
1495 SILC_LOG_ERROR(("Refusing connection, server is full"));
1496 server->stat.conn_failures++;
1497 silc_net_close_connection(sock);
1501 /* Set socket options */
1502 silc_net_set_socket_nonblock(sock);
1503 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1505 /* We don't create a ID yet, since we don't know what type of connection
1506 this is yet. But, we do add the connection to the socket table. */
1507 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1508 server->sockets[sock] = newsocket;
1510 /* Perform asynchronous host lookup. This will lookup the IP and the
1511 FQDN of the remote connection. After the lookup is done the connection
1512 is accepted further. */
1513 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1514 proto_ctx->server = server;
1515 proto_ctx->context = (void *)fd;
1516 silc_socket_host_lookup(newsocket, TRUE,
1517 silc_server_accept_new_connection_lookup,
1518 (void *)proto_ctx, server->schedule);
1521 /* Second part of accepting new connection. Key exchange protocol has been
1522 performed and now it is time to do little connection authentication
1523 protocol to figure out whether this connection is client or server
1524 and whether it has right to access this server (especially server
1525 connections needs to be authenticated). */
1527 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1529 SilcProtocol protocol = (SilcProtocol)context;
1530 SilcServerKEInternalContext *ctx =
1531 (SilcServerKEInternalContext *)protocol->context;
1532 SilcServer server = (SilcServer)ctx->server;
1533 SilcSocketConnection sock = ctx->sock;
1534 SilcServerConnAuthInternalContext *proto_ctx;
1536 SILC_LOG_DEBUG(("Start"));
1538 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1539 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1540 /* Error occured during protocol */
1541 SILC_LOG_DEBUG(("Error key exchange protocol"));
1542 silc_protocol_free(protocol);
1543 sock->protocol = NULL;
1544 silc_ske_free_key_material(ctx->keymat);
1546 silc_packet_context_free(ctx->packet);
1548 silc_ske_free(ctx->ske);
1549 silc_free(ctx->dest_id);
1550 silc_server_config_unref(&ctx->cconfig);
1551 silc_server_config_unref(&ctx->sconfig);
1552 silc_server_config_unref(&ctx->rconfig);
1554 silc_schedule_task_del_by_callback(server->schedule,
1555 silc_server_failure_callback);
1556 silc_server_disconnect_remote(server, sock,
1557 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1559 server->stat.auth_failures++;
1563 /* We now have the key material as the result of the key exchange
1564 protocol. Take the key material into use. Free the raw key material
1565 as soon as we've set them into use. */
1566 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1567 ctx->sock, ctx->keymat,
1568 ctx->ske->prop->cipher,
1569 ctx->ske->prop->pkcs,
1570 ctx->ske->prop->hash,
1571 ctx->ske->prop->hmac,
1572 ctx->ske->prop->group,
1574 SILC_LOG_ERROR(("Error setting key material in use"));
1575 silc_protocol_free(protocol);
1576 sock->protocol = NULL;
1577 silc_ske_free_key_material(ctx->keymat);
1579 silc_packet_context_free(ctx->packet);
1581 silc_ske_free(ctx->ske);
1582 silc_free(ctx->dest_id);
1583 silc_server_config_unref(&ctx->cconfig);
1584 silc_server_config_unref(&ctx->sconfig);
1585 silc_server_config_unref(&ctx->rconfig);
1587 silc_schedule_task_del_by_callback(server->schedule,
1588 silc_server_failure_callback);
1589 silc_server_disconnect_remote(server, sock,
1590 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1591 server->stat.auth_failures++;
1594 silc_ske_free_key_material(ctx->keymat);
1596 /* Allocate internal context for the authentication protocol. This
1597 is sent as context for the protocol. */
1598 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1599 proto_ctx->server = (void *)server;
1600 proto_ctx->sock = sock;
1601 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1602 proto_ctx->responder = TRUE;
1603 proto_ctx->dest_id_type = ctx->dest_id_type;
1604 proto_ctx->dest_id = ctx->dest_id;
1605 proto_ctx->cconfig = ctx->cconfig;
1606 proto_ctx->sconfig = ctx->sconfig;
1607 proto_ctx->rconfig = ctx->rconfig;
1609 /* Free old protocol as it is finished now */
1610 silc_protocol_free(protocol);
1612 silc_packet_context_free(ctx->packet);
1614 sock->protocol = NULL;
1616 /* Allocate the authentication protocol. This is allocated here
1617 but we won't start it yet. We will be receiving party of this
1618 protocol thus we will wait that connecting party will make
1619 their first move. */
1620 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1621 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1622 &sock->protocol, proto_ctx,
1623 silc_server_accept_new_connection_final);
1625 /* Register timeout task. If the protocol is not executed inside
1626 this timelimit the connection will be terminated. */
1627 proto_ctx->timeout_task =
1628 silc_schedule_task_add(server->schedule, sock->sock,
1629 silc_server_timeout_remote,
1631 server->config->conn_auth_timeout, 0,
1636 /* After this is called, server don't wait for backup router anymore */
1638 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1640 SilcServer server = context;
1641 server->wait_backup = FALSE;
1644 /* Final part of accepting new connection. The connection has now
1645 been authenticated and keys has been exchanged. We also know whether
1646 this is client or server connection. */
1648 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1650 SilcProtocol protocol = (SilcProtocol)context;
1651 SilcServerConnAuthInternalContext *ctx =
1652 (SilcServerConnAuthInternalContext *)protocol->context;
1653 SilcServer server = (SilcServer)ctx->server;
1654 SilcSocketConnection sock = ctx->sock;
1655 SilcServerHBContext hb_context;
1656 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1658 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1660 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1661 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1662 /* Error occured during protocol */
1663 SILC_LOG_DEBUG(("Error during authentication protocol"));
1664 silc_protocol_free(protocol);
1665 sock->protocol = NULL;
1667 silc_packet_context_free(ctx->packet);
1669 silc_ske_free(ctx->ske);
1670 silc_free(ctx->dest_id);
1671 silc_server_config_unref(&ctx->cconfig);
1672 silc_server_config_unref(&ctx->sconfig);
1673 silc_server_config_unref(&ctx->rconfig);
1675 silc_schedule_task_del_by_callback(server->schedule,
1676 silc_server_failure_callback);
1677 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1679 server->stat.auth_failures++;
1683 entry->data.last_receive = time(NULL);
1685 switch (ctx->conn_type) {
1686 case SILC_SOCKET_TYPE_CLIENT:
1688 SilcClientEntry client;
1689 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1691 /* Verify whether this connection is after all allowed to connect */
1692 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1693 &server->config->param,
1694 conn->param, ctx->ske)) {
1695 server->stat.auth_failures++;
1699 /* If we are primary router and we have backup router configured
1700 but it has not connected to use yet, do not accept any other
1702 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1703 !server->backup_router) {
1704 SilcServerConfigRouter *router;
1705 router = silc_server_config_get_backup_router(server);
1706 if (router && strcmp(server->config->server_info->primary->server_ip,
1708 silc_server_find_socket_by_host(server,
1709 SILC_SOCKET_TYPE_SERVER,
1710 router->backup_replace_ip, 0)) {
1711 SILC_LOG_INFO(("Will not accept connections because we do "
1712 "not have backup router connection established"));
1713 silc_server_disconnect_remote(server, sock,
1714 SILC_STATUS_ERR_PERM_DENIED,
1715 "We do not have connection to backup "
1716 "router established, try later");
1717 silc_free(sock->user_data);
1718 server->stat.auth_failures++;
1720 /* From here on, wait 10 seconds for the backup router to appear. */
1721 silc_schedule_task_add(server->schedule, 0,
1722 silc_server_backup_router_wait,
1723 (void *)server, 10, 0,
1724 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1729 SILC_LOG_DEBUG(("Remote host is client"));
1730 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1733 /* Add the client to the client ID cache. The nickname and Client ID
1734 and other information is created after we have received NEW_CLIENT
1735 packet from client. */
1736 client = silc_idlist_add_client(server->local_list,
1737 NULL, NULL, NULL, NULL, NULL, sock, 0);
1739 SILC_LOG_ERROR(("Could not add new client to cache"));
1740 silc_free(sock->user_data);
1741 silc_server_disconnect_remote(server, sock,
1742 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1743 server->stat.auth_failures++;
1746 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1749 server->stat.my_clients++;
1750 server->stat.clients++;
1751 server->stat.cell_clients++;
1753 /* Get connection parameters */
1755 if (conn->param->keepalive_secs)
1756 hearbeat_timeout = conn->param->keepalive_secs;
1759 id_entry = (void *)client;
1762 case SILC_SOCKET_TYPE_SERVER:
1763 case SILC_SOCKET_TYPE_ROUTER:
1765 SilcServerEntry new_server;
1766 bool initiator = FALSE;
1767 bool backup_local = FALSE;
1768 bool backup_router = FALSE;
1769 char *backup_replace_ip = NULL;
1770 SilcUInt16 backup_replace_port = 0;
1771 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1772 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1774 /* If we are backup router and this is incoming server connection
1775 and we do not have connection to primary router, do not allow
1777 if (server->server_type == SILC_BACKUP_ROUTER &&
1778 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1779 !SILC_PRIMARY_ROUTE(server)) {
1780 SILC_LOG_INFO(("Will not accept server connection because we do "
1781 "not have primary router connection established"));
1782 silc_server_disconnect_remote(server, sock,
1783 SILC_STATUS_ERR_PERM_DENIED,
1784 "We do not have connection to primary "
1785 "router established, try later");
1786 silc_free(sock->user_data);
1787 server->stat.auth_failures++;
1791 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1792 /* Verify whether this connection is after all allowed to connect */
1793 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1794 &server->config->param,
1795 rconn ? rconn->param : NULL,
1797 silc_free(sock->user_data);
1798 server->stat.auth_failures++;
1804 if (rconn->param->keepalive_secs)
1805 hearbeat_timeout = rconn->param->keepalive_secs;
1808 initiator = rconn->initiator;
1809 backup_local = rconn->backup_local;
1810 backup_router = rconn->backup_router;
1811 backup_replace_ip = rconn->backup_replace_ip;
1812 backup_replace_port = rconn->backup_replace_port;
1816 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1817 /* Verify whether this connection is after all allowed to connect */
1818 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1819 &server->config->param,
1820 sconn ? sconn->param : NULL,
1822 silc_free(sock->user_data);
1823 server->stat.auth_failures++;
1828 if (sconn->param->keepalive_secs)
1829 hearbeat_timeout = sconn->param->keepalive_secs;
1832 backup_router = sconn->backup_router;
1836 /* If we are primary router and we have backup router configured
1837 but it has not connected to use yet, do not accept any other
1839 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1840 !server->backup_router && !backup_router) {
1841 SilcServerConfigRouter *router;
1842 router = silc_server_config_get_backup_router(server);
1843 if (router && strcmp(server->config->server_info->primary->server_ip,
1845 silc_server_find_socket_by_host(server,
1846 SILC_SOCKET_TYPE_SERVER,
1847 router->backup_replace_ip, 0)) {
1848 SILC_LOG_INFO(("Will not accept connections because we do "
1849 "not have backup router connection established"));
1850 silc_server_disconnect_remote(server, sock,
1851 SILC_STATUS_ERR_PERM_DENIED,
1852 "We do not have connection to backup "
1853 "router established, try later");
1854 silc_free(sock->user_data);
1855 server->stat.auth_failures++;
1857 /* From here on, wait 10 seconds for the backup router to appear. */
1858 silc_schedule_task_add(server->schedule, 0,
1859 silc_server_backup_router_wait,
1860 (void *)server, 10, 0,
1861 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1866 SILC_LOG_DEBUG(("Remote host is %s",
1867 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1868 "server" : (backup_router ?
1869 "backup router" : "router")));
1870 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1871 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1872 "server" : (backup_router ?
1873 "backup router" : "router")));
1875 /* Add the server into server cache. The server name and Server ID
1876 is updated after we have received NEW_SERVER packet from the
1877 server. We mark ourselves as router for this server if we really
1880 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1881 server->local_list : (backup_router ?
1882 server->local_list :
1883 server->global_list)),
1885 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1886 SILC_SERVER : SILC_ROUTER),
1888 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1889 server->id_entry : (backup_router ?
1890 server->id_entry : NULL)),
1893 SILC_LOG_ERROR(("Could not add new server to cache"));
1894 silc_free(sock->user_data);
1895 silc_server_disconnect_remote(server, sock,
1896 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1897 server->stat.auth_failures++;
1900 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1902 id_entry = (void *)new_server;
1904 /* If the incoming connection is router and marked as backup router
1905 then add it to be one of our backups */
1906 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1907 silc_server_backup_add(server, new_server, backup_replace_ip,
1908 backup_replace_port, backup_local);
1910 /* Change it back to SERVER type since that's what it really is. */
1912 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1914 new_server->server_type = SILC_BACKUP_ROUTER;
1915 server->wait_backup = FALSE;
1919 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1920 server->stat.my_servers++;
1922 server->stat.my_routers++;
1923 server->stat.routers++;
1925 server->stat.servers++;
1927 /* Check whether this connection is to be our primary router connection
1928 if we do not already have the primary route. */
1929 if (!backup_router &&
1930 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1931 if (silc_server_config_is_primary_route(server) && !initiator)
1934 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1935 server->standalone = FALSE;
1936 if (!server->id_entry->router) {
1937 server->id_entry->router = id_entry;
1938 server->router = id_entry;
1949 sock->type = ctx->conn_type;
1951 /* Add the common data structure to the ID entry. */
1952 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1954 /* Add to sockets internal pointer for fast referencing */
1955 silc_free(sock->user_data);
1956 sock->user_data = id_entry;
1958 /* Connection has been fully established now. Everything is ok. */
1959 SILC_LOG_DEBUG(("New connection authenticated"));
1961 /* Perform keepalive. The `hb_context' will be freed automatically
1962 when finally calling the silc_socket_free function. */
1963 hb_context = silc_calloc(1, sizeof(*hb_context));
1964 hb_context->server = server;
1965 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1966 silc_server_perform_heartbeat,
1970 silc_schedule_task_del_by_callback(server->schedule,
1971 silc_server_failure_callback);
1972 silc_protocol_free(protocol);
1974 silc_packet_context_free(ctx->packet);
1976 silc_ske_free(ctx->ske);
1977 silc_free(ctx->dest_id);
1978 silc_server_config_unref(&ctx->cconfig);
1979 silc_server_config_unref(&ctx->sconfig);
1980 silc_server_config_unref(&ctx->rconfig);
1982 sock->protocol = NULL;
1985 /* This function is used to read packets from network and send packets to
1986 network. This is usually a generic task. */
1988 SILC_TASK_CALLBACK(silc_server_packet_process)
1990 SilcServer server = (SilcServer)context;
1991 SilcSocketConnection sock = server->sockets[fd];
1992 SilcIDListData idata;
1993 SilcCipher cipher = NULL;
1994 SilcHmac hmac = NULL;
1995 SilcUInt32 sequence = 0;
1999 SILC_LOG_DEBUG(("Unknown socket connection"));
2003 /* Packet sending */
2005 if (type == SILC_TASK_WRITE) {
2006 /* Do not send data to disconnected connection */
2007 if (SILC_IS_DISCONNECTED(sock)) {
2008 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2012 server->stat.packets_sent++;
2014 /* Send the packet */
2015 ret = silc_packet_send(sock, TRUE);
2017 /* If returned -2 could not write to connection now, will do
2023 SILC_LOG_ERROR(("Error sending packet to connection "
2024 "%s:%d [%s]", sock->hostname, sock->port,
2025 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2026 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2027 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2032 /* The packet has been sent and now it is time to set the connection
2033 back to only for input. When there is again some outgoing data
2034 available for this connection it will be set for output as well.
2035 This call clears the output setting and sets it only for input. */
2036 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2037 SILC_UNSET_OUTBUF_PENDING(sock);
2039 silc_buffer_clear(sock->outbuf);
2043 /* Packet receiving */
2045 /* Read some data from connection */
2046 ret = silc_packet_receive(sock);
2050 SILC_LOG_ERROR(("Error receiving packet from connection "
2051 "%s:%d [%s] %s", sock->hostname, sock->port,
2052 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2053 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2054 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2055 "Router"), strerror(errno)));
2061 SILC_LOG_DEBUG(("Read EOF"));
2063 /* If connection is disconnecting already we will finally
2064 close the connection */
2065 if (SILC_IS_DISCONNECTING(sock)) {
2066 if (sock->user_data)
2067 silc_server_free_sock_user_data(server, sock, NULL);
2068 silc_server_close_connection(server, sock);
2072 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2073 SILC_SET_DISCONNECTING(sock);
2075 if (sock->user_data) {
2077 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2078 silc_server_free_sock_user_data(server, sock, tmp);
2080 silc_server_free_sock_user_data(server, sock, NULL);
2081 } else if (server->router_conn && server->router_conn->sock == sock &&
2082 !server->router && server->standalone)
2083 silc_schedule_task_add(server->schedule, 0,
2084 silc_server_connect_to_router,
2087 SILC_TASK_PRI_NORMAL);
2089 silc_server_close_connection(server, sock);
2093 /* If connection is disconnecting or disconnected we will ignore
2095 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2096 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2100 /* Get keys and stuff from ID entry */
2101 idata = (SilcIDListData)sock->user_data;
2103 cipher = idata->receive_key;
2104 hmac = idata->hmac_receive;
2105 sequence = idata->psn_receive;
2108 /* Process the packet. This will call the parser that will then
2109 decrypt and parse the packet. */
2110 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2111 TRUE : FALSE, cipher, hmac, sequence,
2112 silc_server_packet_parse, server);
2114 /* If this socket connection is not authenticated yet and the packet
2115 processing failed we will drop the connection since it can be
2116 a malicious flooder. */
2117 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2118 (!sock->protocol || sock->protocol->protocol->type ==
2119 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2120 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2121 SILC_SET_DISCONNECTING(sock);
2123 if (sock->user_data)
2124 silc_server_free_sock_user_data(server, sock, NULL);
2125 silc_server_close_connection(server, sock);
2129 /* Parses whole packet, received earlier. */
2131 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2133 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2134 SilcServer server = (SilcServer)parse_ctx->context;
2135 SilcSocketConnection sock = parse_ctx->sock;
2136 SilcPacketContext *packet = parse_ctx->packet;
2137 SilcIDListData idata = (SilcIDListData)sock->user_data;
2140 server->stat.packets_received++;
2142 /* Parse the packet */
2143 if (parse_ctx->normal)
2144 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2146 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2148 /* If entry is disabled ignore what we got. */
2149 if (ret != SILC_PACKET_RESUME_ROUTER &&
2150 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2151 SILC_LOG_DEBUG(("Connection is disabled"));
2155 if (ret == SILC_PACKET_NONE) {
2156 SILC_LOG_DEBUG(("Error parsing packet"));
2160 /* Check that the the current client ID is same as in the client's packet. */
2161 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2162 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2163 if (client && client->id && packet->src_id) {
2164 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2165 packet->src_id_type);
2166 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2168 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2175 if (server->server_type == SILC_ROUTER) {
2176 /* Route the packet if it is not destined to us. Other ID types but
2177 server are handled separately after processing them. */
2178 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2179 packet->dst_id_type == SILC_ID_SERVER &&
2180 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2181 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2183 /* Route the packet to fastest route for the destination ID */
2184 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2185 packet->dst_id_type);
2188 silc_server_packet_route(server,
2189 silc_server_route_get(server, id,
2190 packet->dst_id_type),
2197 /* Parse the incoming packet type */
2198 silc_server_packet_parse_type(server, sock, packet);
2200 /* Broadcast packet if it is marked as broadcast packet and it is
2201 originated from router and we are router. */
2202 if (server->server_type == SILC_ROUTER &&
2203 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2204 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2205 /* Broadcast to our primary route */
2206 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2208 /* If we have backup routers then we need to feed all broadcast
2209 data to those servers. */
2210 silc_server_backup_broadcast(server, sock, packet);
2214 silc_packet_context_free(packet);
2215 silc_free(parse_ctx);
2218 /* Parser callback called by silc_packet_receive_process. This merely
2219 registers timeout that will handle the actual parsing when appropriate. */
2221 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2224 SilcServer server = (SilcServer)context;
2225 SilcSocketConnection sock = parser_context->sock;
2226 SilcIDListData idata = (SilcIDListData)sock->user_data;
2229 idata->psn_receive = parser_context->packet->sequence + 1;
2231 /* If protocol for this connection is key exchange or rekey then we'll
2232 process all packets synchronously, since there might be packets in
2233 queue that we are not able to decrypt without first processing the
2234 packets before them. */
2235 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2236 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2237 (sock->protocol && sock->protocol->protocol &&
2238 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2239 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2240 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2243 /* Reprocess data since we'll return FALSE here. This is because
2244 the idata->receive_key might have become valid in the last packet
2245 and we want to call this processor with valid cipher. */
2247 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2248 TRUE : FALSE, idata->receive_key,
2249 idata->hmac_receive, idata->psn_receive,
2250 silc_server_packet_parse, server);
2252 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2253 TRUE : FALSE, NULL, NULL, 0,
2254 silc_server_packet_parse, server);
2258 switch (sock->type) {
2259 case SILC_SOCKET_TYPE_UNKNOWN:
2260 case SILC_SOCKET_TYPE_CLIENT:
2261 /* Parse the packet with timeout */
2262 silc_schedule_task_add(server->schedule, sock->sock,
2263 silc_server_packet_parse_real,
2264 (void *)parser_context, 0, 100000,
2266 SILC_TASK_PRI_NORMAL);
2268 case SILC_SOCKET_TYPE_SERVER:
2269 case SILC_SOCKET_TYPE_ROUTER:
2270 /* Packets from servers are parsed immediately */
2271 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2281 /* Parses the packet type and calls what ever routines the packet type
2282 requires. This is done for all incoming packets. */
2284 void silc_server_packet_parse_type(SilcServer server,
2285 SilcSocketConnection sock,
2286 SilcPacketContext *packet)
2288 SilcPacketType type = packet->type;
2289 SilcIDListData idata = (SilcIDListData)sock->user_data;
2291 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2292 silc_get_packet_name(type), packet->flags));
2294 /* Parse the packet type */
2296 case SILC_PACKET_DISCONNECT:
2299 char *message = NULL;
2301 if (packet->flags & SILC_PACKET_FLAG_LIST)
2303 if (packet->buffer->len < 1)
2306 status = (SilcStatus)packet->buffer->data[0];
2307 if (packet->buffer->len > 1 &&
2308 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2309 message = silc_memdup(packet->buffer->data + 1,
2310 packet->buffer->len - 1);
2312 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2313 sock->ip, sock->hostname,
2314 silc_get_status_message(status), status,
2315 message ? message : ""));
2318 /* Handle the disconnection from our end too */
2319 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2320 silc_server_free_sock_user_data(server, sock, NULL);
2321 silc_server_close_connection(server, sock);
2325 case SILC_PACKET_SUCCESS:
2327 * Success received for something. For now we can have only
2328 * one protocol for connection executing at once hence this
2329 * success message is for whatever protocol is executing currently.
2331 if (packet->flags & SILC_PACKET_FLAG_LIST)
2334 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2337 case SILC_PACKET_FAILURE:
2339 * Failure received for something. For now we can have only
2340 * one protocol for connection executing at once hence this
2341 * failure message is for whatever protocol is executing currently.
2343 if (packet->flags & SILC_PACKET_FLAG_LIST)
2345 if (sock->protocol) {
2346 SilcServerFailureContext f;
2347 f = silc_calloc(1, sizeof(*f));
2351 /* We will wait 5 seconds to process this failure packet */
2352 silc_schedule_task_add(server->schedule, sock->sock,
2353 silc_server_failure_callback, (void *)f, 5, 0,
2354 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2358 case SILC_PACKET_REJECT:
2359 if (packet->flags & SILC_PACKET_FLAG_LIST)
2364 case SILC_PACKET_NOTIFY:
2366 * Received notify packet. Server can receive notify packets from
2367 * router. Server then relays the notify messages to clients if needed.
2369 if (packet->flags & SILC_PACKET_FLAG_LIST)
2370 silc_server_notify_list(server, sock, packet);
2372 silc_server_notify(server, sock, packet);
2378 case SILC_PACKET_CHANNEL_MESSAGE:
2380 * Received channel message. Channel messages are special packets
2381 * (although probably most common ones) thus they are handled
2384 if (packet->flags & SILC_PACKET_FLAG_LIST)
2386 idata->last_receive = time(NULL);
2387 silc_server_channel_message(server, sock, packet);
2390 case SILC_PACKET_CHANNEL_KEY:
2392 * Received key for channel. As channels are created by the router
2393 * the keys are as well. We will distribute the key to all of our
2394 * locally connected clients on the particular channel. Router
2395 * never receives this channel and thus is ignored.
2397 if (packet->flags & SILC_PACKET_FLAG_LIST)
2399 silc_server_channel_key(server, sock, packet);
2405 case SILC_PACKET_COMMAND:
2407 * Recived command. Processes the command request and allocates the
2408 * command context and calls the command.
2410 if (packet->flags & SILC_PACKET_FLAG_LIST)
2412 silc_server_command_process(server, sock, packet);
2415 case SILC_PACKET_COMMAND_REPLY:
2417 * Received command reply packet. Received command reply to command. It
2418 * may be reply to command sent by us or reply to command sent by client
2419 * that we've routed further.
2421 if (packet->flags & SILC_PACKET_FLAG_LIST)
2423 silc_server_command_reply(server, sock, packet);
2427 * Private Message packets
2429 case SILC_PACKET_PRIVATE_MESSAGE:
2431 * Received private message packet. The packet is coming from either
2434 if (packet->flags & SILC_PACKET_FLAG_LIST)
2436 idata->last_receive = time(NULL);
2437 silc_server_private_message(server, sock, packet);
2440 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2442 * Private message key packet.
2444 if (packet->flags & SILC_PACKET_FLAG_LIST)
2446 silc_server_private_message_key(server, sock, packet);
2450 * Key Exchange protocol packets
2452 case SILC_PACKET_KEY_EXCHANGE:
2453 if (packet->flags & SILC_PACKET_FLAG_LIST)
2456 if (sock->protocol && sock->protocol->protocol &&
2457 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2458 SilcServerKEInternalContext *proto_ctx =
2459 (SilcServerKEInternalContext *)sock->protocol->context;
2461 proto_ctx->packet = silc_packet_context_dup(packet);
2463 /* Let the protocol handle the packet */
2464 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2466 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2467 "protocol active, packet dropped."));
2471 case SILC_PACKET_KEY_EXCHANGE_1:
2472 if (packet->flags & SILC_PACKET_FLAG_LIST)
2475 if (sock->protocol && sock->protocol->protocol &&
2476 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2477 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2479 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2480 SilcServerRekeyInternalContext *proto_ctx =
2481 (SilcServerRekeyInternalContext *)sock->protocol->context;
2483 if (proto_ctx->packet)
2484 silc_packet_context_free(proto_ctx->packet);
2486 proto_ctx->packet = silc_packet_context_dup(packet);
2488 /* Let the protocol handle the packet */
2489 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2491 SilcServerKEInternalContext *proto_ctx =
2492 (SilcServerKEInternalContext *)sock->protocol->context;
2494 if (proto_ctx->packet)
2495 silc_packet_context_free(proto_ctx->packet);
2497 proto_ctx->packet = silc_packet_context_dup(packet);
2498 proto_ctx->dest_id_type = packet->src_id_type;
2499 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2500 packet->src_id_type);
2501 if (!proto_ctx->dest_id)
2504 /* Let the protocol handle the packet */
2505 silc_protocol_execute(sock->protocol, server->schedule,
2509 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2510 "protocol active, packet dropped."));
2514 case SILC_PACKET_KEY_EXCHANGE_2:
2515 if (packet->flags & SILC_PACKET_FLAG_LIST)
2518 if (sock->protocol && sock->protocol->protocol &&
2519 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2520 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2522 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2523 SilcServerRekeyInternalContext *proto_ctx =
2524 (SilcServerRekeyInternalContext *)sock->protocol->context;
2526 if (proto_ctx->packet)
2527 silc_packet_context_free(proto_ctx->packet);
2529 proto_ctx->packet = silc_packet_context_dup(packet);
2531 /* Let the protocol handle the packet */
2532 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2534 SilcServerKEInternalContext *proto_ctx =
2535 (SilcServerKEInternalContext *)sock->protocol->context;
2537 if (proto_ctx->packet)
2538 silc_packet_context_free(proto_ctx->packet);
2540 proto_ctx->packet = silc_packet_context_dup(packet);
2541 proto_ctx->dest_id_type = packet->src_id_type;
2542 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2543 packet->src_id_type);
2544 if (!proto_ctx->dest_id)
2547 /* Let the protocol handle the packet */
2548 silc_protocol_execute(sock->protocol, server->schedule,
2552 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2553 "protocol active, packet dropped."));
2557 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2559 * Connection authentication request packet. When we receive this packet
2560 * we will send to the other end information about our mandatory
2561 * authentication method for the connection. This packet maybe received
2564 if (packet->flags & SILC_PACKET_FLAG_LIST)
2566 silc_server_connection_auth_request(server, sock, packet);
2570 * Connection Authentication protocol packets
2572 case SILC_PACKET_CONNECTION_AUTH:
2573 /* Start of the authentication protocol. We receive here the
2574 authentication data and will verify it. */
2575 if (packet->flags & SILC_PACKET_FLAG_LIST)
2578 if (sock->protocol && sock->protocol->protocol->type
2579 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2581 SilcServerConnAuthInternalContext *proto_ctx =
2582 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2584 proto_ctx->packet = silc_packet_context_dup(packet);
2586 /* Let the protocol handle the packet */
2587 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2589 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2590 "protocol active, packet dropped."));
2594 case SILC_PACKET_NEW_ID:
2596 * Received New ID packet. This includes some new ID that has been
2597 * created. It may be for client, server or channel. This is the way
2598 * to distribute information about new registered entities in the
2601 if (packet->flags & SILC_PACKET_FLAG_LIST)
2602 silc_server_new_id_list(server, sock, packet);
2604 silc_server_new_id(server, sock, packet);
2607 case SILC_PACKET_NEW_CLIENT:
2609 * Received new client packet. This includes client information that
2610 * we will use to create initial client ID. After creating new
2611 * ID we will send it to the client.
2613 if (packet->flags & SILC_PACKET_FLAG_LIST)
2615 silc_server_new_client(server, sock, packet);
2618 case SILC_PACKET_NEW_SERVER:
2620 * Received new server packet. This includes Server ID and some other
2621 * information that we may save. This is received after server has
2624 if (packet->flags & SILC_PACKET_FLAG_LIST)
2626 silc_server_new_server(server, sock, packet);
2629 case SILC_PACKET_NEW_CHANNEL:
2631 * Received new channel packet. Information about new channel in the
2632 * network are distributed using this packet.
2634 if (packet->flags & SILC_PACKET_FLAG_LIST)
2635 silc_server_new_channel_list(server, sock, packet);
2637 silc_server_new_channel(server, sock, packet);
2640 case SILC_PACKET_HEARTBEAT:
2642 * Received heartbeat.
2644 if (packet->flags & SILC_PACKET_FLAG_LIST)
2648 case SILC_PACKET_KEY_AGREEMENT:
2650 * Received heartbeat.
2652 if (packet->flags & SILC_PACKET_FLAG_LIST)
2654 silc_server_key_agreement(server, sock, packet);
2657 case SILC_PACKET_REKEY:
2659 * Received re-key packet. The sender wants to regenerate the session
2662 if (packet->flags & SILC_PACKET_FLAG_LIST)
2664 silc_server_rekey(server, sock, packet);
2667 case SILC_PACKET_REKEY_DONE:
2669 * The re-key is done.
2671 if (packet->flags & SILC_PACKET_FLAG_LIST)
2674 if (sock->protocol && sock->protocol->protocol &&
2675 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2677 SilcServerRekeyInternalContext *proto_ctx =
2678 (SilcServerRekeyInternalContext *)sock->protocol->context;
2680 if (proto_ctx->packet)
2681 silc_packet_context_free(proto_ctx->packet);
2683 proto_ctx->packet = silc_packet_context_dup(packet);
2685 /* Let the protocol handle the packet */
2686 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2688 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2689 "protocol active, packet dropped."));
2693 case SILC_PACKET_FTP:
2695 if (packet->flags & SILC_PACKET_FLAG_LIST)
2697 silc_server_ftp(server, sock, packet);
2700 case SILC_PACKET_RESUME_CLIENT:
2702 if (packet->flags & SILC_PACKET_FLAG_LIST)
2704 silc_server_resume_client(server, sock, packet);
2707 case SILC_PACKET_RESUME_ROUTER:
2708 /* Resume router packet received. This packet is received for backup
2709 router resuming protocol. */
2710 if (packet->flags & SILC_PACKET_FLAG_LIST)
2712 silc_server_backup_resume_router(server, sock, packet);
2716 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2721 /* Creates connection to a remote router. */
2723 void silc_server_create_connection(SilcServer server,
2724 const char *remote_host, SilcUInt32 port)
2726 SilcServerConnection sconn;
2728 /* Allocate connection object for hold connection specific stuff. */
2729 sconn = silc_calloc(1, sizeof(*sconn));
2730 sconn->server = server;
2731 sconn->remote_host = strdup(remote_host);
2732 sconn->remote_port = port;
2733 sconn->no_reconnect = TRUE;
2735 silc_schedule_task_add(server->schedule, 0,
2736 silc_server_connect_router,
2737 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2738 SILC_TASK_PRI_NORMAL);
2741 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2743 silc_socket_free(context);
2746 /* Closes connection to socket connection */
2748 void silc_server_close_connection(SilcServer server,
2749 SilcSocketConnection sock)
2751 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2752 silc_schedule_task_add(server->schedule, 0,
2753 silc_server_close_connection_final,
2754 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2755 SILC_TASK_PRI_NORMAL);
2759 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2761 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2762 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2763 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2766 /* We won't listen for this connection anymore */
2767 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2769 /* Unregister all tasks */
2770 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2772 /* Close the actual connection */
2773 silc_net_close_connection(sock->sock);
2774 server->sockets[sock->sock] = NULL;
2776 /* If sock->user_data is NULL then we'll check for active protocols
2777 here since the silc_server_free_sock_user_data has not been called
2778 for this connection. */
2779 if (!sock->user_data) {
2780 /* If any protocol is active cancel its execution. It will call
2781 the final callback which will finalize the disconnection. */
2782 if (sock->protocol) {
2783 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2784 silc_protocol_cancel(sock->protocol, server->schedule);
2785 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2786 silc_protocol_execute_final(sock->protocol, server->schedule);
2787 sock->protocol = NULL;
2792 silc_schedule_task_add(server->schedule, 0,
2793 silc_server_close_connection_final,
2794 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2795 SILC_TASK_PRI_NORMAL);
2798 /* Sends disconnect message to remote connection and disconnects the
2801 void silc_server_disconnect_remote(SilcServer server,
2802 SilcSocketConnection sock,
2803 SilcStatus status, ...)
2806 unsigned char buf[512];
2814 memset(buf, 0, sizeof(buf));
2815 va_start(ap, status);
2816 cp = va_arg(ap, char *);
2818 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2823 SILC_LOG_DEBUG(("Disconnecting remote host"));
2825 /* Notify remote end that the conversation is over. The notify message
2826 is tried to be sent immediately. */
2830 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2832 buffer = silc_buffer_alloc_size(len);
2836 buffer->data[0] = status;
2838 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2840 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2841 buffer->data, buffer->len, TRUE);
2842 silc_buffer_free(buffer);
2845 silc_server_packet_queue_purge(server, sock);
2847 /* Mark the connection to be disconnected */
2848 SILC_SET_DISCONNECTED(sock);
2849 silc_server_close_connection(server, sock);
2854 SilcClientEntry client;
2855 } *FreeClientInternal;
2857 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2859 FreeClientInternal i = (FreeClientInternal)context;
2861 silc_idlist_del_data(i->client);
2862 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2866 /* Frees client data and notifies about client's signoff. */
2868 void silc_server_free_client_data(SilcServer server,
2869 SilcSocketConnection sock,
2870 SilcClientEntry client,
2872 const char *signoff)
2874 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2876 SILC_LOG_DEBUG(("Freeing client data"));
2879 if (!client->router && !client->connection &&
2880 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2881 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2882 SILC_LOG_ERROR(("****** Contact Pekka"));
2883 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2888 /* If there is pending outgoing data for the client then purge it
2889 to the network before removing the client entry. */
2890 silc_server_packet_queue_purge(server, sock);
2893 /* Check if anyone is watching this nickname */
2894 if (server->server_type == SILC_ROUTER)
2895 silc_server_check_watcher_list(server, client, NULL,
2896 SILC_NOTIFY_TYPE_SIGNOFF);
2898 /* Send SIGNOFF notify to routers. */
2900 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2901 SILC_BROADCAST(server), client->id,
2905 /* Remove client from all channels */
2907 silc_server_remove_from_channels(server, NULL, client,
2908 TRUE, (char *)signoff, TRUE);
2910 silc_server_remove_from_channels(server, NULL, client,
2911 FALSE, NULL, FALSE);
2913 /* Remove this client from watcher list if it is */
2914 silc_server_del_from_watcher_list(server, client);
2916 /* Update statistics */
2917 server->stat.my_clients--;
2918 server->stat.clients--;
2919 if (server->stat.cell_clients)
2920 server->stat.cell_clients--;
2921 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2922 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2923 silc_schedule_task_del_by_context(server->schedule, client);
2925 /* We will not delete the client entry right away. We will take it
2926 into history (for WHOWAS command) for 5 minutes */
2929 silc_schedule_task_add(server->schedule, 0,
2930 silc_server_free_client_data_timeout,
2932 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2933 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2935 client->router = NULL;
2936 client->connection = NULL;
2939 /* Frees user_data pointer from socket connection object. This also sends
2940 appropriate notify packets to the network to inform about leaving
2943 void silc_server_free_sock_user_data(SilcServer server,
2944 SilcSocketConnection sock,
2945 const char *signoff_message)
2947 switch (sock->type) {
2948 case SILC_SOCKET_TYPE_CLIENT:
2950 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2951 silc_server_free_client_data(server, sock, user_data, TRUE,
2955 case SILC_SOCKET_TYPE_SERVER:
2956 case SILC_SOCKET_TYPE_ROUTER:
2958 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2959 SilcServerEntry backup_router = NULL;
2961 SILC_LOG_DEBUG(("Freeing server data"));
2964 backup_router = silc_server_backup_get(server, user_data->id);
2966 /* If this was our primary router connection then we're lost to
2967 the outside world. */
2968 if (server->router == user_data) {
2969 /* Check whether we have a backup router connection */
2970 if (!backup_router || backup_router == user_data) {
2971 silc_schedule_task_add(server->schedule, 0,
2972 silc_server_connect_to_router,
2975 SILC_TASK_PRI_NORMAL);
2977 server->id_entry->router = NULL;
2978 server->router = NULL;
2979 server->standalone = TRUE;
2980 backup_router = NULL;
2982 if (server->id_entry != backup_router) {
2983 SILC_LOG_INFO(("New primary router is backup router %s",
2984 backup_router->server_name));
2985 server->id_entry->router = backup_router;
2986 server->router = backup_router;
2987 server->router_connect = time(0);
2988 server->backup_primary = TRUE;
2990 SILC_LOG_INFO(("We are now new primary router in this cell"));
2991 server->id_entry->router = NULL;
2992 server->router = NULL;
2993 server->standalone = TRUE;
2995 /* We stop here to take a breath */
2999 if (server->server_type == SILC_BACKUP_ROUTER) {
3000 server->server_type = SILC_ROUTER;
3002 /* We'll need to constantly try to reconnect to the primary
3003 router so that we'll see when it comes back online. */
3004 silc_server_backup_reconnect(server, sock->ip, sock->port,
3005 silc_server_backup_connected,
3009 /* Mark this connection as replaced */
3010 silc_server_backup_replaced_add(server, user_data->id,
3013 } else if (backup_router) {
3014 SILC_LOG_INFO(("Enabling the use of backup router %s",
3015 backup_router->server_name));
3016 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3017 backup_router->server_name));
3019 /* Mark this connection as replaced */
3020 silc_server_backup_replaced_add(server, user_data->id,
3024 if (!backup_router) {
3025 /* Remove all servers that are originated from this server, and
3026 remove the clients of those servers too. */
3027 silc_server_remove_servers_by_server(server, user_data, TRUE);
3029 /* Remove the clients that this server owns as they will become
3031 silc_server_remove_clients_by_server(server, user_data,
3034 /* Remove channels owned by this server */
3035 if (server->server_type == SILC_SERVER)
3036 silc_server_remove_channels_by_server(server, user_data);
3038 /* Enable local server connections that may be disabled */
3039 silc_server_local_servers_toggle_enabled(server, TRUE);
3041 /* If we are router and just lost our primary router (now standlaone)
3042 we remove everything that was behind it, since we don't know
3044 if (server->server_type == SILC_ROUTER && server->standalone)
3045 /* Remove all servers that are originated from this server, and
3046 remove the clients of those servers too. */
3047 silc_server_remove_servers_by_server(server, user_data, TRUE);
3049 /* Update the client entries of this server to the new backup
3050 router. If we are the backup router we also resolve the real
3051 servers for the clients. After updating is over this also
3052 removes the clients that this server explicitly owns. */
3053 silc_server_update_clients_by_server(server, user_data,
3054 backup_router, TRUE, TRUE);
3056 /* Update our server cache to use the new backup router too. */
3057 silc_server_update_servers_by_server(server, user_data, backup_router);
3058 if (server->server_type == SILC_SERVER)
3059 silc_server_update_channels_by_server(server, user_data,
3062 /* Send notify about primary router going down to local operators */
3063 if (server->backup_router)
3064 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3065 SILC_NOTIFY_TYPE_NONE,
3066 ("%s switched to backup router %s "
3067 "(we are primary router now)",
3068 server->server_name, server->server_name));
3070 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3071 SILC_NOTIFY_TYPE_NONE,
3072 ("%s switched to backup router %s",
3073 server->server_name,
3074 server->router->server_name));
3077 /* Free the server entry */
3078 silc_server_backup_del(server, user_data);
3079 silc_server_backup_replaced_del(server, user_data);
3080 silc_idlist_del_data(user_data);
3081 if (!silc_idlist_del_server(server->local_list, user_data))
3082 silc_idlist_del_server(server->global_list, user_data);
3083 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3084 server->stat.my_servers--;
3086 server->stat.my_routers--;
3087 server->stat.routers--;
3089 server->stat.servers--;
3090 if (server->server_type == SILC_ROUTER)
3091 server->stat.cell_servers--;
3093 if (backup_router && backup_router != server->id_entry) {
3094 /* Announce all of our stuff that was created about 5 minutes ago.
3095 The backup router knows all the other stuff already. */
3096 if (server->server_type == SILC_ROUTER)
3097 silc_server_announce_servers(server, FALSE, time(0) - 300,
3098 backup_router->connection);
3100 /* Announce our clients and channels to the router */
3101 silc_server_announce_clients(server, time(0) - 300,
3102 backup_router->connection);
3103 silc_server_announce_channels(server, time(0) - 300,
3104 backup_router->connection);
3110 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3112 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3114 silc_idlist_del_data(user_data);
3115 silc_free(user_data);
3120 /* If any protocol is active cancel its execution */
3121 if (sock->protocol) {
3122 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3123 silc_protocol_cancel(sock->protocol, server->schedule);
3124 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3125 silc_protocol_execute_final(sock->protocol, server->schedule);
3126 sock->protocol = NULL;
3129 sock->user_data = NULL;
3132 /* Removes client from all channels it has joined. This is used when client
3133 connection is disconnected. If the client on a channel is last, the
3134 channel is removed as well. This sends the SIGNOFF notify types. */
3136 void silc_server_remove_from_channels(SilcServer server,
3137 SilcSocketConnection sock,
3138 SilcClientEntry client,
3140 const char *signoff_message,
3143 SilcChannelEntry channel;
3144 SilcChannelClientEntry chl;
3145 SilcHashTableList htl;
3146 SilcBuffer clidp = NULL;
3151 SILC_LOG_DEBUG(("Removing client from joined channels"));
3153 if (notify && !client->id)
3157 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3162 /* Remove the client from all channels. The client is removed from
3163 the channels' user list. */
3164 silc_hash_table_list(client->channels, &htl);
3165 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3166 channel = chl->channel;
3168 /* Remove channel if this is last client leaving the channel, unless
3169 the channel is permanent. */
3170 if (server->server_type == SILC_ROUTER &&
3171 silc_hash_table_count(channel->user_list) < 2) {
3172 silc_server_channel_delete(server, channel);
3176 silc_hash_table_del(client->channels, channel);
3177 silc_hash_table_del(channel->user_list, chl->client);
3178 channel->user_count--;
3180 /* If there is no global users on the channel anymore mark the channel
3181 as local channel. Do not check if the removed client is local client. */
3182 if (server->server_type != SILC_ROUTER && channel->global_users &&
3183 chl->client->router && !silc_server_channel_has_global(channel))
3184 channel->global_users = FALSE;
3188 /* Update statistics */
3189 if (SILC_IS_LOCAL(client))
3190 server->stat.my_chanclients--;
3191 if (server->server_type == SILC_ROUTER) {
3192 server->stat.cell_chanclients--;
3193 server->stat.chanclients--;
3196 /* If there is not at least one local user on the channel then we don't
3197 need the channel entry anymore, we can remove it safely, unless the
3198 channel is permanent channel */
3199 if (server->server_type != SILC_ROUTER &&
3200 !silc_server_channel_has_local(channel)) {
3201 /* Notify about leaving client if this channel has global users. */
3202 if (notify && channel->global_users)
3203 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3204 SILC_NOTIFY_TYPE_SIGNOFF,
3205 signoff_message ? 2 : 1,
3206 clidp->data, clidp->len,
3207 signoff_message, signoff_message ?
3208 strlen(signoff_message) : 0);
3210 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3211 silc_server_channel_delete(server, channel);
3215 /* Send notify to channel about client leaving SILC and channel too */
3217 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3218 SILC_NOTIFY_TYPE_SIGNOFF,
3219 signoff_message ? 2 : 1,
3220 clidp->data, clidp->len,
3221 signoff_message, signoff_message ?
3222 strlen(signoff_message) : 0);
3224 /* Re-generate channel key if needed */
3225 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3226 if (!silc_server_create_channel_key(server, channel, 0))
3229 /* Send the channel key to the channel. The key of course is not sent
3230 to the client who was removed from the channel. */
3231 silc_server_send_channel_key(server, client->connection, channel,
3232 server->server_type == SILC_ROUTER ?
3233 FALSE : !server->standalone);
3237 silc_hash_table_list_reset(&htl);
3239 silc_buffer_free(clidp);
3242 /* Removes client from one channel. This is used for example when client
3243 calls LEAVE command to remove itself from the channel. Returns TRUE
3244 if channel still exists and FALSE if the channel is removed when
3245 last client leaves the channel. If `notify' is FALSE notify messages
3248 bool silc_server_remove_from_one_channel(SilcServer server,
3249 SilcSocketConnection sock,
3250 SilcChannelEntry channel,
3251 SilcClientEntry client,
3254 SilcChannelClientEntry chl;
3257 SILC_LOG_DEBUG(("Removing %s from channel %s",
3258 silc_id_render(client->id, SILC_ID_CLIENT),
3259 channel->channel_name));
3261 /* Get the entry to the channel, if this client is not on the channel
3263 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3266 /* Remove channel if this is last client leaving the channel, unless
3267 the channel is permanent. */
3268 if (server->server_type == SILC_ROUTER &&
3269 silc_hash_table_count(channel->user_list) < 2) {
3270 silc_server_channel_delete(server, channel);
3274 silc_hash_table_del(client->channels, chl->channel);
3275 silc_hash_table_del(channel->user_list, chl->client);
3276 channel->user_count--;
3278 /* If there is no global users on the channel anymore mark the channel
3279 as local channel. Do not check if the client is local client. */
3280 if (server->server_type != SILC_ROUTER && channel->global_users &&
3281 chl->client->router && !silc_server_channel_has_global(channel))
3282 channel->global_users = FALSE;
3286 /* Update statistics */
3287 if (SILC_IS_LOCAL(client))
3288 server->stat.my_chanclients--;
3289 if (server->server_type == SILC_ROUTER) {
3290 server->stat.cell_chanclients--;
3291 server->stat.chanclients--;
3294 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3298 /* If there is not at least one local user on the channel then we don't
3299 need the channel entry anymore, we can remove it safely, unless the
3300 channel is permanent channel */
3301 if (server->server_type != SILC_ROUTER &&
3302 !silc_server_channel_has_local(channel)) {
3303 /* Notify about leaving client if this channel has global users. */
3304 if (notify && channel->global_users)
3305 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3306 SILC_NOTIFY_TYPE_LEAVE, 1,
3307 clidp->data, clidp->len);
3309 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3310 silc_server_channel_delete(server, channel);
3311 silc_buffer_free(clidp);
3315 /* Send notify to channel about client leaving the channel */
3317 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3318 SILC_NOTIFY_TYPE_LEAVE, 1,
3319 clidp->data, clidp->len);
3321 silc_buffer_free(clidp);
3325 /* Timeout callback. This is called if connection is idle or for some
3326 other reason is not responding within some period of time. This
3327 disconnects the remote end. */
3329 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3331 SilcServer server = (SilcServer)context;
3332 SilcSocketConnection sock = server->sockets[fd];
3333 SilcProtocolType protocol = 0;
3335 SILC_LOG_DEBUG(("Start"));
3340 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3341 sock->hostname, sock->ip));
3343 /* If we have protocol active we must assure that we call the protocol's
3344 final callback so that all the memory is freed. */
3345 if (sock->protocol) {
3346 protocol = sock->protocol->protocol->type;
3347 silc_protocol_cancel(sock->protocol, server->schedule);
3348 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3349 silc_protocol_execute_final(sock->protocol, server->schedule);
3350 sock->protocol = NULL;
3354 if (sock->user_data)
3355 silc_server_free_sock_user_data(server, sock, NULL);
3357 silc_server_disconnect_remote(server, sock,
3359 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3360 SILC_STATUS_ERR_AUTH_FAILED :
3361 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3362 "Connection timeout");
3365 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3366 function may be used only by router. In real SILC network all channels
3367 are created by routers thus this function is never used by normal
3370 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3371 SilcServerID *router_id,
3377 SilcChannelID *channel_id;
3378 SilcChannelEntry entry;
3382 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3385 cipher = SILC_DEFAULT_CIPHER;
3387 hmac = SILC_DEFAULT_HMAC;
3389 /* Allocate cipher */
3390 if (!silc_cipher_alloc(cipher, &key))
3394 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3395 silc_cipher_free(key);
3399 channel_name = strdup(channel_name);
3401 /* Create the channel ID */
3402 if (!silc_id_create_channel_id(server, router_id, server->rng,
3404 silc_free(channel_name);
3405 silc_cipher_free(key);
3406 silc_hmac_free(newhmac);
3410 /* Create the channel */
3411 entry = silc_idlist_add_channel(server->local_list, channel_name,
3412 SILC_CHANNEL_MODE_NONE, channel_id,
3413 NULL, key, newhmac, 0);
3415 silc_free(channel_name);
3416 silc_cipher_free(key);
3417 silc_hmac_free(newhmac);
3418 silc_free(channel_id);
3422 entry->cipher = strdup(cipher);
3423 entry->hmac_name = strdup(hmac);
3425 /* Now create the actual key material */
3426 if (!silc_server_create_channel_key(server, entry,
3427 silc_cipher_get_key_len(key) / 8)) {
3428 silc_idlist_del_channel(server->local_list, entry);
3432 /* Notify other routers about the new channel. We send the packet
3433 to our primary route. */
3435 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3436 channel_name, entry->id,
3437 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3440 /* Distribute to backup routers */
3441 if (broadcast && server->server_type == SILC_ROUTER) {
3444 SilcUInt32 name_len = strlen(channel_name);
3445 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3446 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3448 packet = silc_channel_payload_encode(channel_name, name_len,
3449 cid, channel_id_len, entry->mode);
3450 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3451 packet->data, packet->len, FALSE, TRUE);
3453 silc_buffer_free(packet);
3456 server->stat.my_channels++;
3457 if (server->server_type == SILC_ROUTER) {
3458 server->stat.channels++;
3459 server->stat.cell_channels++;
3460 entry->users_resolved = TRUE;
3466 /* Same as above but creates the channel with Channel ID `channel_id. */
3469 silc_server_create_new_channel_with_id(SilcServer server,
3473 SilcChannelID *channel_id,
3476 SilcChannelEntry entry;
3480 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3483 cipher = SILC_DEFAULT_CIPHER;
3485 hmac = SILC_DEFAULT_HMAC;
3487 /* Allocate cipher */
3488 if (!silc_cipher_alloc(cipher, &key))
3492 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3493 silc_cipher_free(key);
3497 channel_name = strdup(channel_name);
3499 /* Create the channel */
3500 entry = silc_idlist_add_channel(server->local_list, channel_name,
3501 SILC_CHANNEL_MODE_NONE, channel_id,
3502 NULL, key, newhmac, 0);
3504 silc_cipher_free(key);
3505 silc_hmac_free(newhmac);
3506 silc_free(channel_name);
3510 /* Now create the actual key material */
3511 if (!silc_server_create_channel_key(server, entry,
3512 silc_cipher_get_key_len(key) / 8)) {
3513 silc_idlist_del_channel(server->local_list, entry);
3517 /* Notify other routers about the new channel. We send the packet
3518 to our primary route. */
3520 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3521 channel_name, entry->id,
3522 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3525 /* Distribute to backup routers */
3526 if (broadcast && server->server_type == SILC_ROUTER) {
3529 SilcUInt32 name_len = strlen(channel_name);
3530 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3531 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3533 packet = silc_channel_payload_encode(channel_name, name_len,
3534 cid, channel_id_len, entry->mode);
3535 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3536 packet->data, packet->len, FALSE, TRUE);
3538 silc_buffer_free(packet);
3541 server->stat.my_channels++;
3542 if (server->server_type == SILC_ROUTER) {
3543 server->stat.channels++;
3544 server->stat.cell_channels++;
3545 entry->users_resolved = TRUE;
3551 /* Channel's key re-key timeout callback. */
3553 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3555 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3556 SilcServer server = (SilcServer)rekey->context;
3560 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3563 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3566 /* Generates new channel key. This is used to create the initial channel key
3567 but also to re-generate new key for channel. If `key_len' is provided
3568 it is the bytes of the key length. */
3570 bool silc_server_create_channel_key(SilcServer server,
3571 SilcChannelEntry channel,
3575 unsigned char channel_key[32], hash[32];
3578 SILC_LOG_DEBUG(("Generating channel key"));
3580 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3581 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3585 if (!channel->channel_key)
3586 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3587 channel->channel_key = NULL;
3593 else if (channel->key_len)
3594 len = channel->key_len / 8;
3596 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3598 /* Create channel key */
3599 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3602 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3604 /* Remove old key if exists */
3606 memset(channel->key, 0, channel->key_len / 8);
3607 silc_free(channel->key);
3611 channel->key_len = len * 8;
3612 channel->key = silc_memdup(channel_key, len);
3613 memset(channel_key, 0, sizeof(channel_key));
3615 /* Generate HMAC key from the channel key data and set it */
3617 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3618 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3619 silc_hmac_set_key(channel->hmac, hash,
3620 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3621 memset(hash, 0, sizeof(hash));
3623 if (server->server_type == SILC_ROUTER) {
3624 if (!channel->rekey)
3625 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3626 channel->rekey->context = (void *)server;
3627 channel->rekey->channel = channel;
3628 channel->rekey->key_len = key_len;
3629 if (channel->rekey->task)
3630 silc_schedule_task_del(server->schedule, channel->rekey->task);
3632 channel->rekey->task =
3633 silc_schedule_task_add(server->schedule, 0,
3634 silc_server_channel_key_rekey,
3635 (void *)channel->rekey,
3636 server->config->channel_rekey_secs, 0,
3638 SILC_TASK_PRI_NORMAL);
3644 /* Saves the channel key found in the encoded `key_payload' buffer. This
3645 function is used when we receive Channel Key Payload and also when we're
3646 processing JOIN command reply. Returns entry to the channel. */
3648 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3649 SilcBuffer key_payload,
3650 SilcChannelEntry channel)
3652 SilcChannelKeyPayload payload = NULL;
3653 SilcChannelID *id = NULL;
3654 unsigned char *tmp, hash[32];
3658 SILC_LOG_DEBUG(("Saving new channel key"));
3660 /* Decode channel key payload */
3661 payload = silc_channel_key_payload_parse(key_payload->data,
3664 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3669 /* Get the channel entry */
3672 /* Get channel ID */
3673 tmp = silc_channel_key_get_id(payload, &tmp_len);
3674 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3680 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3682 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3684 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3685 silc_id_render(id, SILC_ID_CHANNEL)));
3691 tmp = silc_channel_key_get_key(payload, &tmp_len);
3697 cipher = silc_channel_key_get_cipher(payload, NULL);
3703 /* Remove old key if exists */
3705 memset(channel->key, 0, channel->key_len / 8);
3706 silc_free(channel->key);
3707 silc_cipher_free(channel->channel_key);
3710 /* Create new cipher */
3711 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3712 channel->channel_key = NULL;
3717 if (channel->cipher)
3718 silc_free(channel->cipher);
3719 channel->cipher = strdup(cipher);
3722 channel->key_len = tmp_len * 8;
3723 channel->key = silc_memdup(tmp, tmp_len);
3724 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3726 /* Generate HMAC key from the channel key data and set it */
3728 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3729 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3730 silc_hmac_set_key(channel->hmac, hash,
3731 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3733 memset(hash, 0, sizeof(hash));
3734 memset(tmp, 0, tmp_len);
3736 if (server->server_type == SILC_ROUTER) {
3737 if (!channel->rekey)
3738 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3739 channel->rekey->context = (void *)server;
3740 channel->rekey->channel = channel;
3741 if (channel->rekey->task)
3742 silc_schedule_task_del(server->schedule, channel->rekey->task);
3744 channel->rekey->task =
3745 silc_schedule_task_add(server->schedule, 0,
3746 silc_server_channel_key_rekey,
3747 (void *)channel->rekey,
3748 server->config->channel_rekey_secs, 0,
3750 SILC_TASK_PRI_NORMAL);
3756 silc_channel_key_payload_free(payload);
3761 /* Heartbeat callback. This function is set as argument for the
3762 silc_socket_set_heartbeat function. The library will call this function
3763 at the set time interval. */
3765 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3768 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3770 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3772 /* Send the heartbeat */
3773 silc_server_send_heartbeat(hb->server, sock);
3776 /* Returns assembled of all servers in the given ID list. The packet's
3777 form is dictated by the New ID payload. */
3779 static void silc_server_announce_get_servers(SilcServer server,
3780 SilcServerEntry remote,
3782 SilcBuffer *servers,
3783 unsigned long creation_time)
3785 SilcIDCacheList list;
3786 SilcIDCacheEntry id_cache;
3787 SilcServerEntry entry;
3790 /* Go through all clients in the list */
3791 if (silc_idcache_get_all(id_list->servers, &list)) {
3792 if (silc_idcache_list_first(list, &id_cache)) {
3794 entry = (SilcServerEntry)id_cache->context;
3796 /* Do not announce the one we've sending our announcements and
3797 do not announce ourself. Also check the creation time if it's
3799 if ((entry == remote) || (entry == server->id_entry) ||
3800 (creation_time && entry->data.created < creation_time)) {
3801 if (!silc_idcache_list_next(list, &id_cache))
3806 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3808 *servers = silc_buffer_realloc(*servers,
3810 (*servers)->truelen + idp->len :
3812 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3813 silc_buffer_put(*servers, idp->data, idp->len);
3814 silc_buffer_pull(*servers, idp->len);
3815 silc_buffer_free(idp);
3817 if (!silc_idcache_list_next(list, &id_cache))
3822 silc_idcache_list_free(list);
3827 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3833 p = silc_notify_payload_encode(notify, argc, ap);
3839 /* This function is used by router to announce existing servers to our
3840 primary router when we've connected to it. If `creation_time' is non-zero
3841 then only the servers that has been created after the `creation_time'
3842 will be announced. */
3844 void silc_server_announce_servers(SilcServer server, bool global,
3845 unsigned long creation_time,
3846 SilcSocketConnection remote)
3848 SilcBuffer servers = NULL;
3850 SILC_LOG_DEBUG(("Announcing servers"));
3852 /* Get servers in local list */
3853 silc_server_announce_get_servers(server, remote->user_data,
3854 server->local_list, &servers,
3858 /* Get servers in global list */
3859 silc_server_announce_get_servers(server, remote->user_data,
3860 server->global_list, &servers,
3864 silc_buffer_push(servers, servers->data - servers->head);
3865 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3867 /* Send the packet */
3868 silc_server_packet_send(server, remote,
3869 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3870 servers->data, servers->len, TRUE);
3872 silc_buffer_free(servers);
3876 /* Returns assembled packet of all clients in the given ID list. The
3877 packet's form is dictated by the New ID Payload. */
3879 static void silc_server_announce_get_clients(SilcServer server,
3881 SilcBuffer *clients,
3883 unsigned long creation_time)
3885 SilcIDCacheList list;
3886 SilcIDCacheEntry id_cache;
3887 SilcClientEntry client;
3890 unsigned char mode[4];
3892 /* Go through all clients in the list */
3893 if (silc_idcache_get_all(id_list->clients, &list)) {
3894 if (silc_idcache_list_first(list, &id_cache)) {
3896 client = (SilcClientEntry)id_cache->context;
3898 if (creation_time && client->data.created < creation_time) {
3899 if (!silc_idcache_list_next(list, &id_cache))
3904 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3906 *clients = silc_buffer_realloc(*clients,
3908 (*clients)->truelen + idp->len :
3910 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3911 silc_buffer_put(*clients, idp->data, idp->len);
3912 silc_buffer_pull(*clients, idp->len);
3914 SILC_PUT32_MSB(client->mode, mode);
3916 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3917 2, idp->data, idp->len,
3919 *umodes = silc_buffer_realloc(*umodes,
3921 (*umodes)->truelen + tmp->len :
3923 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3924 silc_buffer_put(*umodes, tmp->data, tmp->len);
3925 silc_buffer_pull(*umodes, tmp->len);
3926 silc_buffer_free(tmp);
3928 silc_buffer_free(idp);
3930 if (!silc_idcache_list_next(list, &id_cache))
3935 silc_idcache_list_free(list);
3939 /* This function is used to announce our existing clients to our router
3940 when we've connected to it. If `creation_time' is non-zero then only
3941 the clients that has been created after the `creation_time' will be
3944 void silc_server_announce_clients(SilcServer server,
3945 unsigned long creation_time,
3946 SilcSocketConnection remote)
3948 SilcBuffer clients = NULL;
3949 SilcBuffer umodes = NULL;
3951 SILC_LOG_DEBUG(("Announcing clients"));
3953 /* Get clients in local list */
3954 silc_server_announce_get_clients(server, server->local_list,
3955 &clients, &umodes, creation_time);
3957 /* As router we announce our global list as well */
3958 if (server->server_type == SILC_ROUTER)
3959 silc_server_announce_get_clients(server, server->global_list,
3960 &clients, &umodes, creation_time);
3963 silc_buffer_push(clients, clients->data - clients->head);
3964 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3966 /* Send the packet */
3967 silc_server_packet_send(server, remote,
3968 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3969 clients->data, clients->len, TRUE);
3971 silc_buffer_free(clients);
3975 silc_buffer_push(umodes, umodes->data - umodes->head);
3976 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3978 /* Send the packet */
3979 silc_server_packet_send(server, remote,
3980 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3981 umodes->data, umodes->len, TRUE);
3983 silc_buffer_free(umodes);
3987 /* Returns channel's topic for announcing it */
3989 void silc_server_announce_get_channel_topic(SilcServer server,
3990 SilcChannelEntry channel,
3995 if (channel->topic) {
3996 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3997 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3998 chidp->data, chidp->len,
4000 strlen(channel->topic));
4001 silc_buffer_free(chidp);
4005 /* Returns assembled packets for channel users of the `channel'. */
4007 void silc_server_announce_get_channel_users(SilcServer server,
4008 SilcChannelEntry channel,
4009 SilcBuffer *channel_modes,
4010 SilcBuffer *channel_users,
4011 SilcBuffer *channel_users_modes)
4013 SilcChannelClientEntry chl;
4014 SilcHashTableList htl;
4015 SilcBuffer chidp, clidp, csidp;
4018 unsigned char mode[4], *fkey = NULL;
4019 SilcUInt32 fkey_len = 0;
4022 SILC_LOG_DEBUG(("Start"));
4024 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4025 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4028 SILC_PUT32_MSB(channel->mode, mode);
4029 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4030 if (channel->founder_key)
4031 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4033 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4034 6, csidp->data, csidp->len,
4037 hmac, hmac ? strlen(hmac) : 0,
4038 channel->passphrase,
4039 channel->passphrase ?
4040 strlen(channel->passphrase) : 0,
4044 silc_buffer_realloc(*channel_modes,
4046 (*channel_modes)->truelen + len : len));
4047 silc_buffer_pull_tail(*channel_modes,
4048 ((*channel_modes)->end -
4049 (*channel_modes)->data));
4050 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4051 silc_buffer_pull(*channel_modes, len);
4052 silc_buffer_free(tmp);
4057 /* Now find all users on the channel */
4058 silc_hash_table_list(channel->user_list, &htl);
4059 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4060 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4063 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4064 clidp->data, clidp->len,
4065 chidp->data, chidp->len);
4068 silc_buffer_realloc(*channel_users,
4070 (*channel_users)->truelen + len : len));
4071 silc_buffer_pull_tail(*channel_users,
4072 ((*channel_users)->end -
4073 (*channel_users)->data));
4075 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4076 silc_buffer_pull(*channel_users, len);
4077 silc_buffer_free(tmp);
4079 /* CUMODE notify for mode change on the channel */
4080 SILC_PUT32_MSB(chl->mode, mode);
4081 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4082 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4083 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4084 4, csidp->data, csidp->len,
4086 clidp->data, clidp->len,
4089 *channel_users_modes =
4090 silc_buffer_realloc(*channel_users_modes,
4091 (*channel_users_modes ?
4092 (*channel_users_modes)->truelen + len : len));
4093 silc_buffer_pull_tail(*channel_users_modes,
4094 ((*channel_users_modes)->end -
4095 (*channel_users_modes)->data));
4097 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4098 silc_buffer_pull(*channel_users_modes, len);
4099 silc_buffer_free(tmp);
4103 silc_buffer_free(clidp);
4105 silc_hash_table_list_reset(&htl);
4106 silc_buffer_free(chidp);
4107 silc_buffer_free(csidp);
4110 /* Returns assembled packets for all channels and users on those channels
4111 from the given ID List. The packets are in the form dictated by the
4112 New Channel and New Channel User payloads. */
4114 void silc_server_announce_get_channels(SilcServer server,
4116 SilcBuffer *channels,
4117 SilcBuffer **channel_modes,
4118 SilcBuffer *channel_users,
4119 SilcBuffer **channel_users_modes,
4120 SilcUInt32 *channel_users_modes_c,
4121 SilcBuffer **channel_topics,
4122 SilcChannelID ***channel_ids,
4123 unsigned long creation_time)
4125 SilcIDCacheList list;
4126 SilcIDCacheEntry id_cache;
4127 SilcChannelEntry channel;
4130 SilcUInt16 name_len;
4132 int i = *channel_users_modes_c;
4135 SILC_LOG_DEBUG(("Start"));
4137 /* Go through all channels in the list */
4138 if (silc_idcache_get_all(id_list->channels, &list)) {
4139 if (silc_idcache_list_first(list, &id_cache)) {
4141 channel = (SilcChannelEntry)id_cache->context;
4143 if (creation_time && channel->created < creation_time)
4148 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4149 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4150 name_len = strlen(channel->channel_name);
4153 len = 4 + name_len + id_len + 4;
4155 silc_buffer_realloc(*channels,
4156 (*channels ? (*channels)->truelen +
4158 silc_buffer_pull_tail(*channels,
4159 ((*channels)->end - (*channels)->data));
4160 silc_buffer_format(*channels,
4161 SILC_STR_UI_SHORT(name_len),
4162 SILC_STR_UI_XNSTRING(channel->channel_name,
4164 SILC_STR_UI_SHORT(id_len),
4165 SILC_STR_UI_XNSTRING(cid, id_len),
4166 SILC_STR_UI_INT(channel->mode),
4168 silc_buffer_pull(*channels, len);
4171 /* Channel user modes */
4172 *channel_users_modes = silc_realloc(*channel_users_modes,
4173 sizeof(**channel_users_modes) *
4175 (*channel_users_modes)[i] = NULL;
4176 *channel_modes = silc_realloc(*channel_modes,
4177 sizeof(**channel_modes) * (i + 1));
4178 (*channel_modes)[i] = NULL;
4179 *channel_ids = silc_realloc(*channel_ids,
4180 sizeof(**channel_ids) * (i + 1));
4181 (*channel_ids)[i] = NULL;
4182 silc_server_announce_get_channel_users(server, channel,
4183 &(*channel_modes)[i],
4185 &(*channel_users_modes)[i]);
4186 (*channel_ids)[i] = channel->id;
4188 /* Channel's topic */
4189 *channel_topics = silc_realloc(*channel_topics,
4190 sizeof(**channel_topics) * (i + 1));
4191 (*channel_topics)[i] = NULL;
4192 silc_server_announce_get_channel_topic(server, channel,
4193 &(*channel_topics)[i]);
4194 (*channel_users_modes_c)++;
4197 if (!silc_idcache_list_next(list, &id_cache))
4202 silc_idcache_list_free(list);
4206 /* This function is used to announce our existing channels to our router
4207 when we've connected to it. This also announces the users on the
4208 channels to the router. If the `creation_time' is non-zero only the
4209 channels that was created after the `creation_time' are announced.
4210 Note that the channel users are still announced even if the `creation_time'
4213 void silc_server_announce_channels(SilcServer server,
4214 unsigned long creation_time,
4215 SilcSocketConnection remote)
4217 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4218 SilcBuffer *channel_users_modes = NULL;
4219 SilcBuffer *channel_topics = NULL;
4220 SilcUInt32 channel_users_modes_c = 0;
4221 SilcChannelID **channel_ids = NULL;
4223 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4225 /* Get channels and channel users in local list */
4226 silc_server_announce_get_channels(server, server->local_list,
4227 &channels, &channel_modes,
4229 &channel_users_modes,
4230 &channel_users_modes_c,
4232 &channel_ids, creation_time);
4234 /* Get channels and channel users in global list */
4235 if (server->server_type != SILC_SERVER)
4236 silc_server_announce_get_channels(server, server->global_list,
4237 &channels, &channel_modes,
4239 &channel_users_modes,
4240 &channel_users_modes_c,
4242 &channel_ids, creation_time);
4245 silc_buffer_push(channels, channels->data - channels->head);
4246 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4248 /* Send the packet */
4249 silc_server_packet_send(server, remote,
4250 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4251 channels->data, channels->len,
4254 silc_buffer_free(channels);
4257 if (channel_users) {
4258 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4259 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4260 channel_users->len);
4262 /* Send the packet */
4263 silc_server_packet_send(server, remote,
4264 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4265 channel_users->data, channel_users->len,
4268 silc_buffer_free(channel_users);
4271 if (channel_modes) {
4274 for (i = 0; i < channel_users_modes_c; i++) {
4275 if (!channel_modes[i])
4277 silc_buffer_push(channel_modes[i],
4278 channel_modes[i]->data -
4279 channel_modes[i]->head);
4280 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4281 channel_modes[i]->len);
4282 silc_server_packet_send_dest(server, remote,
4283 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4284 channel_ids[i], SILC_ID_CHANNEL,
4285 channel_modes[i]->data,
4286 channel_modes[i]->len,
4288 silc_buffer_free(channel_modes[i]);
4290 silc_free(channel_modes);
4293 if (channel_users_modes) {
4296 for (i = 0; i < channel_users_modes_c; i++) {
4297 if (!channel_users_modes[i])
4299 silc_buffer_push(channel_users_modes[i],
4300 channel_users_modes[i]->data -
4301 channel_users_modes[i]->head);
4302 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4303 channel_users_modes[i]->len);
4304 silc_server_packet_send_dest(server, remote,
4305 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4306 channel_ids[i], SILC_ID_CHANNEL,
4307 channel_users_modes[i]->data,
4308 channel_users_modes[i]->len,
4310 silc_buffer_free(channel_users_modes[i]);
4312 silc_free(channel_users_modes);
4315 if (channel_topics) {
4318 for (i = 0; i < channel_users_modes_c; i++) {
4319 if (!channel_topics[i])
4322 silc_buffer_push(channel_topics[i],
4323 channel_topics[i]->data -
4324 channel_topics[i]->head);
4325 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4326 channel_topics[i]->len);
4327 silc_server_packet_send_dest(server, remote,
4328 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4329 channel_ids[i], SILC_ID_CHANNEL,
4330 channel_topics[i]->data,
4331 channel_topics[i]->len,
4333 silc_buffer_free(channel_topics[i]);
4335 silc_free(channel_topics);
4338 silc_free(channel_ids);
4341 /* Failure timeout callback. If this is called then we will immediately
4342 process the received failure. We always process the failure with timeout
4343 since we do not want to blindly trust to received failure packets.
4344 This won't be called (the timeout is cancelled) if the failure was
4345 bogus (it is bogus if remote does not close the connection after sending
4348 SILC_TASK_CALLBACK(silc_server_failure_callback)
4350 SilcServerFailureContext f = (SilcServerFailureContext)context;
4352 if (f->sock->protocol) {
4353 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4354 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4360 /* Assembles user list and users mode list from the `channel'. */
4362 bool silc_server_get_users_on_channel(SilcServer server,
4363 SilcChannelEntry channel,
4364 SilcBuffer *user_list,
4365 SilcBuffer *mode_list,
4366 SilcUInt32 *user_count)
4368 SilcChannelClientEntry chl;
4369 SilcHashTableList htl;
4370 SilcBuffer client_id_list;
4371 SilcBuffer client_mode_list;
4373 SilcUInt32 list_count = 0, len = 0;
4375 if (!silc_hash_table_count(channel->user_list))
4378 silc_hash_table_list(channel->user_list, &htl);
4379 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4380 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4381 silc_hash_table_list_reset(&htl);
4383 client_id_list = silc_buffer_alloc(len);
4385 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4386 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4387 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4389 silc_hash_table_list(channel->user_list, &htl);
4390 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4392 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4393 silc_buffer_put(client_id_list, idp->data, idp->len);
4394 silc_buffer_pull(client_id_list, idp->len);
4395 silc_buffer_free(idp);
4397 /* Client's mode on channel */
4398 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4399 silc_buffer_pull(client_mode_list, 4);
4403 silc_hash_table_list_reset(&htl);
4404 silc_buffer_push(client_id_list,
4405 client_id_list->data - client_id_list->head);
4406 silc_buffer_push(client_mode_list,
4407 client_mode_list->data - client_mode_list->head);
4409 *user_list = client_id_list;
4410 *mode_list = client_mode_list;
4411 *user_count = list_count;
4415 /* Saves users and their modes to the `channel'. */
4417 void silc_server_save_users_on_channel(SilcServer server,
4418 SilcSocketConnection sock,
4419 SilcChannelEntry channel,
4420 SilcClientID *noadd,
4421 SilcBuffer user_list,
4422 SilcBuffer mode_list,
4423 SilcUInt32 user_count)
4428 SilcClientID *client_id;
4429 SilcClientEntry client;
4430 SilcIDCacheEntry cache;
4431 SilcChannelClientEntry chl;
4434 SILC_LOG_DEBUG(("Start"));
4436 for (i = 0; i < user_count; i++) {
4438 SILC_GET16_MSB(idp_len, user_list->data + 2);
4440 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4441 silc_buffer_pull(user_list, idp_len);
4446 SILC_GET32_MSB(mode, mode_list->data);
4447 silc_buffer_pull(mode_list, 4);
4449 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4450 silc_free(client_id);
4456 /* Check if we have this client cached already. */
4457 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4458 server->server_type, &cache);
4460 client = silc_idlist_find_client_by_id(server->global_list,
4461 client_id, server->server_type,
4466 /* If router did not find such Client ID in its lists then this must
4467 be bogus client or some router in the net is buggy. */
4468 if (server->server_type == SILC_ROUTER) {
4469 silc_free(client_id);
4473 /* We don't have that client anywhere, add it. The client is added
4474 to global list since server didn't have it in the lists so it must be
4476 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4477 silc_id_dup(client_id, SILC_ID_CLIENT),
4478 sock->user_data, NULL, 0);
4480 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4481 silc_free(client_id);
4485 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4487 /* Found, if it is from global list we'll assure that we won't
4488 expire it now that the entry is on channel. */
4493 silc_free(client_id);
4495 if (!silc_server_client_on_channel(client, channel, &chl)) {
4496 /* Client was not on the channel, add it. */
4497 chl = silc_calloc(1, sizeof(*chl));
4498 chl->client = client;
4500 chl->channel = channel;
4501 silc_hash_table_add(channel->user_list, chl->client, chl);
4502 silc_hash_table_add(client->channels, chl->channel, chl);
4503 channel->user_count++;
4511 /* Saves channels and channels user modes to the `client'. Removes
4512 the client from those channels that are not sent in the list but
4515 void silc_server_save_user_channels(SilcServer server,
4516 SilcSocketConnection sock,
4517 SilcClientEntry client,
4518 SilcBuffer channels,
4519 SilcBuffer channels_user_modes)
4522 SilcUInt32 *chumodes;
4523 SilcChannelPayload entry;
4524 SilcChannelEntry channel;
4525 SilcChannelID *channel_id;
4526 SilcChannelClientEntry chl;
4527 SilcHashTable ht = NULL;
4528 SilcHashTableList htl;
4532 if (!channels ||!channels_user_modes)
4535 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4536 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4538 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4539 NULL, NULL, NULL, TRUE);
4540 silc_dlist_start(ch);
4541 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4542 /* Check if we have this channel, and add it if we don't have it.
4543 Also add the client on the channel unless it is there already. */
4544 channel_id = silc_channel_get_id_parse(entry);
4545 channel = silc_idlist_find_channel_by_id(server->local_list,
4548 channel = silc_idlist_find_channel_by_id(server->global_list,
4551 if (server->server_type != SILC_SERVER) {
4552 silc_free(channel_id);
4557 /* We don't have that channel anywhere, add it. */
4558 name = silc_channel_get_name(entry, NULL);
4559 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4560 channel_id, server->router,
4563 silc_free(channel_id);
4570 channel->mode = silc_channel_get_mode(entry);
4572 /* Add the client on the channel */
4573 if (!silc_server_client_on_channel(client, channel, &chl)) {
4574 chl = silc_calloc(1, sizeof(*chl));
4575 chl->client = client;
4576 chl->mode = chumodes[i++];
4577 chl->channel = channel;
4578 silc_hash_table_add(channel->user_list, chl->client, chl);
4579 silc_hash_table_add(client->channels, chl->channel, chl);
4580 channel->user_count++;
4583 chl->mode = chumodes[i++];
4586 silc_hash_table_add(ht, channel, channel);
4587 silc_free(channel_id);
4589 silc_channel_payload_list_free(ch);
4590 silc_free(chumodes);
4594 /* Go through the list again and remove client from channels that
4595 are no part of the list. */
4597 silc_hash_table_list(client->channels, &htl);
4598 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4599 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4600 silc_hash_table_del(chl->channel->user_list, chl->client);
4601 silc_hash_table_del(chl->client->channels, chl->channel);
4605 silc_hash_table_list_reset(&htl);
4606 silc_hash_table_free(ht);
4608 silc_hash_table_list(client->channels, &htl);
4609 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4610 silc_hash_table_del(chl->channel->user_list, chl->client);
4611 silc_hash_table_del(chl->client->channels, chl->channel);
4614 silc_hash_table_list_reset(&htl);
4618 /* Lookups route to the client indicated by the `id_data'. The connection
4619 object and internal data object is returned. Returns NULL if route
4620 could not be found to the client. If the `client_id' is specified then
4621 it is used and the `id_data' is ignored. */
4623 SilcSocketConnection
4624 silc_server_get_client_route(SilcServer server,
4625 unsigned char *id_data,
4627 SilcClientID *client_id,
4628 SilcIDListData *idata,
4629 SilcClientEntry *client_entry)
4632 SilcClientEntry client;
4634 SILC_LOG_DEBUG(("Start"));
4637 *client_entry = NULL;
4639 /* Decode destination Client ID */
4641 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4643 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4647 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4650 /* If the destination belongs to our server we don't have to route
4651 the packet anywhere but to send it to the local destination. */
4652 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4656 /* If we are router and the client has router then the client is in
4657 our cell but not directly connected to us. */
4658 if (server->server_type == SILC_ROUTER && client->router) {
4659 /* We are of course in this case the client's router thus the route
4660 to the client is the server who owns the client. So, we will send
4661 the packet to that server. */
4663 *idata = (SilcIDListData)client->router;
4664 return client->router->connection;
4667 /* Seems that client really is directly connected to us */
4669 *idata = (SilcIDListData)client;
4671 *client_entry = client;
4672 return client->connection;
4675 /* Destination belongs to someone not in this server. If we are normal
4676 server our action is to send the packet to our router. */
4677 if (server->server_type != SILC_ROUTER && !server->standalone) {
4680 *idata = (SilcIDListData)server->router;
4681 return SILC_PRIMARY_ROUTE(server);
4684 /* We are router and we will perform route lookup for the destination
4685 and send the packet to fastest route. */
4686 if (server->server_type == SILC_ROUTER && !server->standalone) {
4687 /* Check first that the ID is valid */
4688 client = silc_idlist_find_client_by_id(server->global_list, id,
4691 SilcSocketConnection dst_sock;
4693 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4697 *idata = (SilcIDListData)dst_sock->user_data;
4706 /* Encodes and returns channel list of channels the `client' has joined.
4707 Secret channels are not put to the list. */
4709 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4710 SilcClientEntry client,
4713 SilcBuffer *user_mode_list)
4715 SilcBuffer buffer = NULL;
4716 SilcChannelEntry channel;
4717 SilcChannelClientEntry chl;
4718 SilcHashTableList htl;
4721 SilcUInt16 name_len;
4725 *user_mode_list = NULL;
4727 silc_hash_table_list(client->channels, &htl);
4728 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4729 channel = chl->channel;
4731 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4733 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4736 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4737 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4738 name_len = strlen(channel->channel_name);
4740 len = 4 + name_len + id_len + 4;
4741 buffer = silc_buffer_realloc(buffer,
4742 (buffer ? buffer->truelen + len : len));
4743 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4744 silc_buffer_format(buffer,
4745 SILC_STR_UI_SHORT(name_len),
4746 SILC_STR_UI_XNSTRING(channel->channel_name,
4748 SILC_STR_UI_SHORT(id_len),
4749 SILC_STR_UI_XNSTRING(cid, id_len),
4750 SILC_STR_UI_INT(chl->channel->mode),
4752 silc_buffer_pull(buffer, len);
4755 if (user_mode_list) {
4756 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4758 (*user_mode_list)->truelen + 4 :
4760 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4761 (*user_mode_list)->data));
4762 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4763 silc_buffer_pull(*user_mode_list, 4);
4766 silc_hash_table_list_reset(&htl);
4769 silc_buffer_push(buffer, buffer->data - buffer->head);
4770 if (user_mode_list && *user_mode_list)
4771 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4772 (*user_mode_list)->head));
4777 /* Finds client entry by Client ID and if it is not found then resolves
4778 it using WHOIS command. */
4780 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4781 SilcClientID *client_id,
4782 bool always_resolve,
4785 SilcClientEntry client;
4790 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4793 client = silc_idlist_find_client_by_id(server->global_list,
4794 client_id, TRUE, NULL);
4795 if (!client && server->server_type == SILC_ROUTER)
4799 if (!client && server->standalone)
4802 if (!client || !client->nickname || !client->username ||
4804 SilcBuffer buffer, idp;
4807 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4808 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4809 client->resolve_cmd_ident = ++server->cmd_ident;
4812 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4813 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4814 server->cmd_ident, 1,
4815 4, idp->data, idp->len);
4816 silc_server_packet_send(server, client ? client->router->connection :
4817 SILC_PRIMARY_ROUTE(server),
4818 SILC_PACKET_COMMAND, 0,
4819 buffer->data, buffer->len, FALSE);
4820 silc_buffer_free(idp);
4821 silc_buffer_free(buffer);
4832 /* A timeout callback for the re-key. We will be the initiator of the
4835 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4837 SilcSocketConnection sock = (SilcSocketConnection)context;
4838 SilcIDListData idata = (SilcIDListData)sock->user_data;
4839 SilcServer server = (SilcServer)idata->rekey->context;
4840 SilcProtocol protocol;
4841 SilcServerRekeyInternalContext *proto_ctx;
4843 /* Allocate internal protocol context. This is sent as context
4845 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4846 proto_ctx->server = (void *)server;
4847 proto_ctx->sock = sock;
4848 proto_ctx->responder = FALSE;
4849 proto_ctx->pfs = idata->rekey->pfs;
4851 /* Perform rekey protocol. Will call the final callback after the
4852 protocol is over. */
4853 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4854 &protocol, proto_ctx, silc_server_rekey_final);
4855 sock->protocol = protocol;
4857 /* Run the protocol */
4858 silc_protocol_execute(protocol, server->schedule, 0, 0);
4860 SILC_LOG_DEBUG(("Rekey protocol completed"));
4862 /* Re-register re-key timeout */
4863 silc_schedule_task_add(server->schedule, sock->sock,
4864 silc_server_rekey_callback,
4865 context, idata->rekey->timeout, 0,
4866 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4869 /* The final callback for the REKEY protocol. This will actually take the
4870 new key material into use. */
4872 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4874 SilcProtocol protocol = (SilcProtocol)context;
4875 SilcServerRekeyInternalContext *ctx =
4876 (SilcServerRekeyInternalContext *)protocol->context;
4877 SilcServer server = (SilcServer)ctx->server;
4878 SilcSocketConnection sock = ctx->sock;
4880 SILC_LOG_DEBUG(("Start"));
4882 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4883 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4884 /* Error occured during protocol */
4885 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4886 silc_protocol_cancel(protocol, server->schedule);
4887 silc_protocol_free(protocol);
4888 sock->protocol = NULL;
4890 silc_packet_context_free(ctx->packet);
4892 silc_ske_free(ctx->ske);
4897 /* Purge the outgoing data queue to assure that all rekey packets really
4898 go to the network before we quit the protocol. */
4899 silc_server_packet_queue_purge(server, sock);
4902 silc_protocol_free(protocol);
4903 sock->protocol = NULL;
4905 silc_packet_context_free(ctx->packet);
4907 silc_ske_free(ctx->ske);
4911 /* Task callback used to retrieve network statistical information from
4912 router server once in a while. */
4914 SILC_TASK_CALLBACK(silc_server_get_stats)
4916 SilcServer server = (SilcServer)context;
4917 SilcBuffer idp, packet;
4919 SILC_LOG_DEBUG(("Retrieving stats from router"));
4921 if (!server->standalone) {
4922 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4923 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4924 ++server->cmd_ident, 1,
4925 1, idp->data, idp->len);
4926 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4927 SILC_PACKET_COMMAND, 0, packet->data,
4928 packet->len, FALSE);
4929 silc_buffer_free(packet);
4930 silc_buffer_free(idp);
4933 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4934 server, 120, 0, SILC_TASK_TIMEOUT,