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(("Connecting to router(s)"));
898 if (server->server_type == SILC_SERVER) {
899 SILC_LOG_DEBUG(("We are normal server"));
900 } else if (server->server_type == SILC_ROUTER) {
901 SILC_LOG_DEBUG(("We are router"));
903 SILC_LOG_DEBUG(("We are backup router/normal server"));
906 if (!server->config->routers) {
907 /* There wasn't a configured router, we will continue but we don't
908 have a connection to outside world. We will be standalone server. */
909 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
910 server->standalone = TRUE;
914 /* Cancel any possible retry timeouts */
915 silc_schedule_task_del_by_callback(server->schedule,
916 silc_server_connect_router);
917 silc_schedule_task_del_by_callback(server->schedule,
918 silc_server_connect_to_router_retry);
920 /* Create the connections to all our routes */
921 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
923 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
924 ptr->backup_router ? "Backup router" : "Router",
925 ptr->initiator ? "Initiator" : "Responder",
926 ptr->host, ptr->port));
928 if (server->server_type == SILC_ROUTER && ptr->backup_router &&
929 ptr->initiator == FALSE && !server->backup_router)
930 server->wait_backup = TRUE;
932 if (ptr->initiator) {
933 /* Check whether we are connected to this host already */
934 if (silc_server_num_sockets_by_remote(server,
935 silc_net_is_ip(ptr->host) ?
937 silc_net_is_ip(ptr->host) ?
938 NULL : ptr->host, ptr->port,
939 SILC_SOCKET_TYPE_ROUTER)) {
940 SILC_LOG_DEBUG(("We are already connected to this router"));
944 /* Allocate connection object for hold connection specific stuff. */
945 sconn = silc_calloc(1, sizeof(*sconn));
946 sconn->server = server;
947 sconn->remote_host = strdup(ptr->host);
948 sconn->remote_port = ptr->port;
949 sconn->backup = ptr->backup_router;
951 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
952 sconn->backup_replace_port = ptr->backup_replace_port;
955 if (!server->router_conn && !sconn->backup)
956 server->router_conn = sconn;
958 silc_schedule_task_add(server->schedule, 0,
959 silc_server_connect_router,
960 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
961 SILC_TASK_PRI_NORMAL);
966 /* Second part of connecting to router(s). Key exchange protocol has been
967 executed and now we will execute authentication protocol. */
969 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
971 SilcProtocol protocol = (SilcProtocol)context;
972 SilcServerKEInternalContext *ctx =
973 (SilcServerKEInternalContext *)protocol->context;
974 SilcServer server = (SilcServer)ctx->server;
975 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
976 SilcSocketConnection sock = ctx->sock;
977 SilcServerConnAuthInternalContext *proto_ctx;
978 SilcServerConfigRouter *conn = NULL;
980 SILC_LOG_DEBUG(("Start"));
982 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
983 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
984 /* Error occured during protocol */
985 silc_protocol_free(protocol);
986 sock->protocol = NULL;
987 silc_ske_free_key_material(ctx->keymat);
989 silc_packet_context_free(ctx->packet);
991 silc_ske_free(ctx->ske);
992 silc_free(ctx->dest_id);
994 silc_schedule_task_del_by_callback(server->schedule,
995 silc_server_failure_callback);
996 silc_server_disconnect_remote(server, sock,
997 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
999 /* Try reconnecting if configuration wants it */
1000 if (!sconn->no_reconnect) {
1001 silc_schedule_task_add(server->schedule, 0,
1002 silc_server_connect_to_router_retry,
1003 sconn, 0, 1, SILC_TASK_TIMEOUT,
1004 SILC_TASK_PRI_NORMAL);
1008 /* Call completion to indicate error */
1009 if (sconn->callback)
1010 (*sconn->callback)(server, NULL, sconn->callback_context);
1012 silc_server_config_unref(&sconn->conn);
1013 silc_free(sconn->remote_host);
1014 silc_free(sconn->backup_replace_ip);
1019 /* We now have the key material as the result of the key exchange
1020 protocol. Take the key material into use. Free the raw key material
1021 as soon as we've set them into use. */
1022 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1023 ctx->sock, ctx->keymat,
1024 ctx->ske->prop->cipher,
1025 ctx->ske->prop->pkcs,
1026 ctx->ske->prop->hash,
1027 ctx->ske->prop->hmac,
1028 ctx->ske->prop->group,
1030 silc_protocol_free(protocol);
1031 sock->protocol = NULL;
1032 silc_ske_free_key_material(ctx->keymat);
1034 silc_packet_context_free(ctx->packet);
1036 silc_ske_free(ctx->ske);
1037 silc_free(ctx->dest_id);
1039 silc_schedule_task_del_by_callback(server->schedule,
1040 silc_server_failure_callback);
1041 silc_server_disconnect_remote(server, sock,
1042 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1044 /* Try reconnecting if configuration wants it */
1045 if (!sconn->no_reconnect) {
1046 silc_schedule_task_add(server->schedule, 0,
1047 silc_server_connect_to_router_retry,
1048 sconn, 0, 1, SILC_TASK_TIMEOUT,
1049 SILC_TASK_PRI_NORMAL);
1053 /* Call completion to indicate error */
1054 if (sconn->callback)
1055 (*sconn->callback)(server, NULL, sconn->callback_context);
1057 silc_server_config_unref(&sconn->conn);
1058 silc_free(sconn->remote_host);
1059 silc_free(sconn->backup_replace_ip);
1063 silc_ske_free_key_material(ctx->keymat);
1065 /* Allocate internal context for the authentication protocol. This
1066 is sent as context for the protocol. */
1067 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1068 proto_ctx->server = (void *)server;
1069 proto_ctx->context = (void *)sconn;
1070 proto_ctx->sock = sock;
1071 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1072 proto_ctx->dest_id_type = ctx->dest_id_type;
1073 proto_ctx->dest_id = ctx->dest_id;
1075 /* Resolve the authentication method used in this connection. Check if
1076 we find a match from user configured connections */
1077 if (!sconn->conn.ref_ptr)
1078 conn = silc_server_config_find_router_conn(server, sock->hostname,
1081 conn = sconn->conn.ref_ptr;
1084 /* Match found. Use the configured authentication method. Take only
1085 the passphrase, since for public key auth we automatically use
1086 our local key pair. */
1087 if (conn->passphrase) {
1088 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
1089 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1091 proto_ctx->auth_data = strdup(conn->passphrase);
1092 proto_ctx->auth_data_len = strlen(conn->passphrase);
1093 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
1095 } else if (conn->publickeys) {
1096 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
1098 proto_ctx->auth_meth = SILC_AUTH_NONE;
1101 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
1102 sock->hostname, sock->ip, sock->port));
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1106 silc_packet_context_free(ctx->packet);
1108 silc_ske_free(ctx->ske);
1109 silc_free(ctx->dest_id);
1111 silc_server_config_unref(&sconn->conn);
1112 silc_free(sconn->remote_host);
1113 silc_free(sconn->backup_replace_ip);
1115 silc_schedule_task_del_by_callback(server->schedule,
1116 silc_server_failure_callback);
1117 silc_server_disconnect_remote(server, sock,
1118 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1122 /* Free old protocol as it is finished now */
1123 silc_protocol_free(protocol);
1125 silc_packet_context_free(ctx->packet);
1127 sock->protocol = NULL;
1129 /* Allocate the authentication protocol. This is allocated here
1130 but we won't start it yet. We will be receiving party of this
1131 protocol thus we will wait that connecting party will make
1132 their first move. */
1133 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1134 &sock->protocol, proto_ctx,
1135 silc_server_connect_to_router_final);
1137 /* Register timeout task. If the protocol is not executed inside
1138 this timelimit the connection will be terminated. */
1139 proto_ctx->timeout_task =
1140 silc_schedule_task_add(server->schedule, sock->sock,
1141 silc_server_timeout_remote,
1143 server->config->conn_auth_timeout, 0,
1147 /* Run the protocol */
1148 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1151 /* Finalizes the connection to router. Registers a server task to the
1152 queue so that we can accept new connections. */
1154 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
1156 SilcProtocol protocol = (SilcProtocol)context;
1157 SilcServerConnAuthInternalContext *ctx =
1158 (SilcServerConnAuthInternalContext *)protocol->context;
1159 SilcServer server = (SilcServer)ctx->server;
1160 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
1161 SilcSocketConnection sock = ctx->sock;
1162 SilcServerEntry id_entry = NULL;
1164 SilcServerHBContext hb_context;
1165 unsigned char *id_string;
1167 SilcIDListData idata;
1168 SilcServerConfigRouter *conn = NULL;
1169 SilcServerConfigConnParams *param = NULL;
1171 SILC_LOG_DEBUG(("Start"));
1173 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1174 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1175 /* Error occured during protocol */
1176 silc_free(ctx->dest_id);
1177 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1180 /* Try reconnecting if configuration wants it */
1181 if (!sconn->no_reconnect) {
1182 silc_schedule_task_add(server->schedule, 0,
1183 silc_server_connect_to_router_retry,
1184 sconn, 0, 1, SILC_TASK_TIMEOUT,
1185 SILC_TASK_PRI_NORMAL);
1192 /* Add a task to the queue. This task receives new connections to the
1193 server. This task remains on the queue until the end of the program. */
1194 if (!server->listenning && !sconn->backup) {
1195 silc_schedule_task_add(server->schedule, server->sock,
1196 silc_server_accept_new_connection,
1197 (void *)server, 0, 0,
1199 SILC_TASK_PRI_NORMAL);
1200 server->listenning = TRUE;
1203 /* Send NEW_SERVER packet to the router. We will become registered
1204 to the SILC network after sending this packet. */
1205 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
1206 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1207 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
1208 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1209 silc_buffer_format(packet,
1210 SILC_STR_UI_SHORT(id_len),
1211 SILC_STR_UI_XNSTRING(id_string, id_len),
1212 SILC_STR_UI_SHORT(strlen(server->server_name)),
1213 SILC_STR_UI_XNSTRING(server->server_name,
1214 strlen(server->server_name)),
1217 /* Send the packet */
1218 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
1219 packet->data, packet->len, TRUE);
1220 silc_buffer_free(packet);
1221 silc_free(id_string);
1223 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
1225 /* Check that we do not have this ID already */
1226 id_entry = silc_idlist_find_server_by_id(server->local_list,
1227 ctx->dest_id, TRUE, NULL);
1229 silc_idcache_del_by_context(server->local_list->servers, id_entry);
1231 id_entry = silc_idlist_find_server_by_id(server->global_list,
1232 ctx->dest_id, TRUE, NULL);
1234 silc_idcache_del_by_context(server->global_list->servers, id_entry);
1237 SILC_LOG_DEBUG(("New server id(%s)",
1238 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
1240 /* Add the connected router to global server list */
1241 id_entry = silc_idlist_add_server(server->global_list,
1242 strdup(sock->hostname),
1243 SILC_ROUTER, ctx->dest_id, NULL, sock);
1245 silc_free(ctx->dest_id);
1246 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
1247 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1252 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1253 silc_free(sock->user_data);
1254 sock->user_data = (void *)id_entry;
1255 sock->type = SILC_SOCKET_TYPE_ROUTER;
1256 idata = (SilcIDListData)sock->user_data;
1257 idata->status |= (SILC_IDLIST_STATUS_REGISTERED |
1258 SILC_IDLIST_STATUS_LOCAL);
1260 conn = sconn->conn.ref_ptr;
1261 param = &server->config->param;
1262 if (conn && conn->param)
1263 param = conn->param;
1265 /* Perform keepalive. The `hb_context' will be freed automatically
1266 when finally calling the silc_socket_free function. */
1267 hb_context = silc_calloc(1, sizeof(*hb_context));
1268 hb_context->server = server;
1269 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
1270 silc_server_perform_heartbeat,
1273 /* Register re-key timeout */
1274 idata->rekey->timeout = param->key_exchange_rekey;
1275 idata->rekey->context = (void *)server;
1276 silc_schedule_task_add(server->schedule, sock->sock,
1277 silc_server_rekey_callback,
1278 (void *)sock, idata->rekey->timeout, 0,
1279 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1281 if (!sconn->backup) {
1282 /* Mark this router our primary router if we're still standalone */
1283 if (server->standalone) {
1284 server->id_entry->router = id_entry;
1285 server->router = id_entry;
1286 server->standalone = FALSE;
1288 /* If we are router then announce our possible servers. */
1289 if (server->server_type == SILC_ROUTER)
1290 silc_server_announce_servers(server, FALSE, 0,
1291 SILC_PRIMARY_ROUTE(server));
1293 /* Announce our clients and channels to the router */
1294 silc_server_announce_clients(server, 0, SILC_PRIMARY_ROUTE(server));
1295 silc_server_announce_channels(server, 0, SILC_PRIMARY_ROUTE(server));
1297 /* If we are backup router then this primary router is whom we are
1299 if (server->server_type == SILC_BACKUP_ROUTER)
1300 silc_server_backup_add(server, server->id_entry, sock->ip, 0, TRUE);
1303 /* Add this server to be our backup router */
1304 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
1305 sconn->backup_replace_port, FALSE);
1308 sock->protocol = NULL;
1311 /* Call the completion callback to indicate that we've connected to
1313 if (sconn->callback)
1314 (*sconn->callback)(server, id_entry, sconn->callback_context);
1316 /* Free the temporary connection data context */
1318 silc_server_config_unref(&sconn->conn);
1319 silc_free(sconn->remote_host);
1320 silc_free(sconn->backup_replace_ip);
1323 if (sconn == server->router_conn)
1324 server->router_conn = NULL;
1327 /* Free the protocol object */
1328 if (sock->protocol == protocol)
1329 sock->protocol = NULL;
1330 silc_protocol_free(protocol);
1332 silc_packet_context_free(ctx->packet);
1334 silc_ske_free(ctx->ske);
1335 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1336 silc_free(ctx->auth_data);
1340 /* Host lookup callback that is called after the incoming connection's
1341 IP and FQDN lookup is performed. This will actually check the acceptance
1342 of the incoming connection and will register the key exchange protocol
1343 for this connection. */
1346 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1349 SilcServerKEInternalContext *proto_ctx =
1350 (SilcServerKEInternalContext *)context;
1351 SilcServer server = (SilcServer)proto_ctx->server;
1352 SilcServerConfigClient *cconfig = NULL;
1353 SilcServerConfigServer *sconfig = NULL;
1354 SilcServerConfigRouter *rconfig = NULL;
1355 SilcServerConfigDeny *deny;
1358 context = (void *)server;
1360 /* Check whether we could resolve both IP and FQDN. */
1361 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1362 server->config->require_reverse_lookup)) {
1363 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1364 sock->hostname ? sock->hostname :
1365 sock->ip ? sock->ip : ""));
1366 server->stat.conn_failures++;
1367 silc_server_disconnect_remote(server, sock,
1368 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
1369 "Unknown host or IP");
1370 silc_free(proto_ctx);
1374 /* Register the connection for network input and output. This sets
1375 that scheduler will listen for incoming packets for this connection
1376 and sets that outgoing packets may be sent to this connection as well.
1377 However, this doesn't set the scheduler for outgoing traffic, it
1378 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1379 later when outgoing data is available. */
1380 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1382 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1385 /* Listenning port */
1386 if (!server->sockets[(SilcUInt32)proto_ctx->context]) {
1387 silc_server_disconnect_remote(server, sock,
1388 SILC_STATUS_ERR_RESOURCE_LIMIT,
1389 "Connection refused");
1390 server->stat.conn_failures++;
1391 silc_free(proto_ctx);
1394 port = server->sockets[(SilcUInt32)proto_ctx->context]->port;
1396 /* Check whether this connection is denied to connect to us. */
1397 deny = silc_server_config_find_denied(server, sock->ip);
1399 deny = silc_server_config_find_denied(server, sock->hostname);
1401 /* The connection is denied */
1402 SILC_LOG_INFO(("Connection %s (%s) is denied",
1403 sock->hostname, sock->ip));
1404 silc_server_disconnect_remote(server, sock,
1405 SILC_STATUS_ERR_BANNED_FROM_SERVER,
1407 server->stat.conn_failures++;
1408 silc_free(proto_ctx);
1412 /* Check whether we have configured this sort of connection at all. We
1413 have to check all configurations since we don't know what type of
1414 connection this is. */
1415 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1416 cconfig = silc_server_config_find_client(server, sock->hostname);
1417 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1418 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1419 if (server->server_type == SILC_ROUTER) {
1420 if (!(rconfig = silc_server_config_find_router_conn(server,
1421 sock->ip, sock->port)))
1422 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1425 if (!cconfig && !sconfig && !rconfig) {
1426 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1428 silc_server_disconnect_remote(server, sock,
1429 SILC_STATUS_ERR_BANNED_FROM_SERVER, NULL);
1430 server->stat.conn_failures++;
1431 silc_free(proto_ctx);
1435 /* The connection is allowed */
1437 /* Set internal context for key exchange protocol. This is
1438 sent as context for the protocol. */
1439 proto_ctx->sock = sock;
1440 proto_ctx->rng = server->rng;
1441 proto_ctx->responder = TRUE;
1442 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1443 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1444 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1446 /* Take flags for key exchange. Since we do not know what type of connection
1447 this is, we go through all found configurations and use the global ones
1448 as well. This will result always into strictest key exchange flags. */
1449 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1450 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1451 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1452 if (server->config->param.key_exchange_pfs)
1453 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1455 /* Prepare the connection for key exchange protocol. We allocate the
1456 protocol but will not start it yet. The connector will be the
1457 initiator of the protocol thus we will wait for initiation from
1458 there before we start the protocol. */
1459 server->stat.auth_attempts++;
1460 SILC_LOG_DEBUG(("Starting key exchange protocol"));
1461 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1462 &sock->protocol, proto_ctx,
1463 silc_server_accept_new_connection_second);
1465 /* Register a timeout task that will be executed if the connector
1466 will not start the key exchange protocol within specified timeout
1467 and the connection will be closed. */
1468 proto_ctx->timeout_task =
1469 silc_schedule_task_add(server->schedule, sock->sock,
1470 silc_server_timeout_remote,
1472 server->config->key_exchange_timeout, 0,
1477 /* Accepts new connections to the server. Accepting new connections are
1478 done in three parts to make it async. */
1480 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1482 SilcServer server = (SilcServer)context;
1483 SilcSocketConnection newsocket;
1484 SilcServerKEInternalContext *proto_ctx;
1487 SILC_LOG_DEBUG(("Accepting new connection"));
1489 server->stat.conn_attempts++;
1491 sock = silc_net_accept_connection(fd);
1493 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1494 server->stat.conn_failures++;
1498 /* Check for maximum allowed connections */
1499 if (sock > server->config->param.connections_max) {
1500 SILC_LOG_ERROR(("Refusing connection, server is full"));
1501 server->stat.conn_failures++;
1502 silc_net_close_connection(sock);
1506 /* Set socket options */
1507 silc_net_set_socket_nonblock(sock);
1508 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1510 /* We don't create a ID yet, since we don't know what type of connection
1511 this is yet. But, we do add the connection to the socket table. */
1512 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1513 server->sockets[sock] = newsocket;
1515 /* Perform asynchronous host lookup. This will lookup the IP and the
1516 FQDN of the remote connection. After the lookup is done the connection
1517 is accepted further. */
1518 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1519 proto_ctx->server = server;
1520 proto_ctx->context = (void *)fd;
1521 silc_socket_host_lookup(newsocket, TRUE,
1522 silc_server_accept_new_connection_lookup,
1523 (void *)proto_ctx, server->schedule);
1526 /* Second part of accepting new connection. Key exchange protocol has been
1527 performed and now it is time to do little connection authentication
1528 protocol to figure out whether this connection is client or server
1529 and whether it has right to access this server (especially server
1530 connections needs to be authenticated). */
1532 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1534 SilcProtocol protocol = (SilcProtocol)context;
1535 SilcServerKEInternalContext *ctx =
1536 (SilcServerKEInternalContext *)protocol->context;
1537 SilcServer server = (SilcServer)ctx->server;
1538 SilcSocketConnection sock = ctx->sock;
1539 SilcServerConnAuthInternalContext *proto_ctx;
1541 SILC_LOG_DEBUG(("Start"));
1543 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1544 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1545 /* Error occured during protocol */
1546 SILC_LOG_DEBUG(("Error key exchange protocol"));
1547 silc_protocol_free(protocol);
1548 sock->protocol = NULL;
1549 silc_ske_free_key_material(ctx->keymat);
1551 silc_packet_context_free(ctx->packet);
1553 silc_ske_free(ctx->ske);
1554 silc_free(ctx->dest_id);
1555 silc_server_config_unref(&ctx->cconfig);
1556 silc_server_config_unref(&ctx->sconfig);
1557 silc_server_config_unref(&ctx->rconfig);
1559 silc_schedule_task_del_by_callback(server->schedule,
1560 silc_server_failure_callback);
1561 silc_server_disconnect_remote(server, sock,
1562 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
1564 server->stat.auth_failures++;
1568 /* We now have the key material as the result of the key exchange
1569 protocol. Take the key material into use. Free the raw key material
1570 as soon as we've set them into use. */
1571 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1572 ctx->sock, ctx->keymat,
1573 ctx->ske->prop->cipher,
1574 ctx->ske->prop->pkcs,
1575 ctx->ske->prop->hash,
1576 ctx->ske->prop->hmac,
1577 ctx->ske->prop->group,
1579 SILC_LOG_ERROR(("Error setting key material in use"));
1580 silc_protocol_free(protocol);
1581 sock->protocol = NULL;
1582 silc_ske_free_key_material(ctx->keymat);
1584 silc_packet_context_free(ctx->packet);
1586 silc_ske_free(ctx->ske);
1587 silc_free(ctx->dest_id);
1588 silc_server_config_unref(&ctx->cconfig);
1589 silc_server_config_unref(&ctx->sconfig);
1590 silc_server_config_unref(&ctx->rconfig);
1592 silc_schedule_task_del_by_callback(server->schedule,
1593 silc_server_failure_callback);
1594 silc_server_disconnect_remote(server, sock,
1595 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED, NULL);
1596 server->stat.auth_failures++;
1599 silc_ske_free_key_material(ctx->keymat);
1601 /* Allocate internal context for the authentication protocol. This
1602 is sent as context for the protocol. */
1603 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1604 proto_ctx->server = (void *)server;
1605 proto_ctx->sock = sock;
1606 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1607 proto_ctx->responder = TRUE;
1608 proto_ctx->dest_id_type = ctx->dest_id_type;
1609 proto_ctx->dest_id = ctx->dest_id;
1610 proto_ctx->cconfig = ctx->cconfig;
1611 proto_ctx->sconfig = ctx->sconfig;
1612 proto_ctx->rconfig = ctx->rconfig;
1614 /* Free old protocol as it is finished now */
1615 silc_protocol_free(protocol);
1617 silc_packet_context_free(ctx->packet);
1619 sock->protocol = NULL;
1621 /* Allocate the authentication protocol. This is allocated here
1622 but we won't start it yet. We will be receiving party of this
1623 protocol thus we will wait that connecting party will make
1624 their first move. */
1625 SILC_LOG_DEBUG(("Starting connection authentication protocol"));
1626 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1627 &sock->protocol, proto_ctx,
1628 silc_server_accept_new_connection_final);
1630 /* Register timeout task. If the protocol is not executed inside
1631 this timelimit the connection will be terminated. */
1632 proto_ctx->timeout_task =
1633 silc_schedule_task_add(server->schedule, sock->sock,
1634 silc_server_timeout_remote,
1636 server->config->conn_auth_timeout, 0,
1641 /* After this is called, server don't wait for backup router anymore */
1643 SILC_TASK_CALLBACK(silc_server_backup_router_wait)
1645 SilcServer server = context;
1646 server->wait_backup = FALSE;
1649 /* Final part of accepting new connection. The connection has now
1650 been authenticated and keys has been exchanged. We also know whether
1651 this is client or server connection. */
1653 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1655 SilcProtocol protocol = (SilcProtocol)context;
1656 SilcServerConnAuthInternalContext *ctx =
1657 (SilcServerConnAuthInternalContext *)protocol->context;
1658 SilcServer server = (SilcServer)ctx->server;
1659 SilcSocketConnection sock = ctx->sock;
1660 SilcServerHBContext hb_context;
1661 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1663 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1665 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1666 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1667 /* Error occured during protocol */
1668 SILC_LOG_DEBUG(("Error during authentication protocol"));
1669 silc_protocol_free(protocol);
1670 sock->protocol = NULL;
1672 silc_packet_context_free(ctx->packet);
1674 silc_ske_free(ctx->ske);
1675 silc_free(ctx->dest_id);
1676 silc_server_config_unref(&ctx->cconfig);
1677 silc_server_config_unref(&ctx->sconfig);
1678 silc_server_config_unref(&ctx->rconfig);
1680 silc_schedule_task_del_by_callback(server->schedule,
1681 silc_server_failure_callback);
1682 silc_server_disconnect_remote(server, sock, SILC_STATUS_ERR_AUTH_FAILED,
1684 server->stat.auth_failures++;
1688 entry->data.last_receive = time(NULL);
1690 switch (ctx->conn_type) {
1691 case SILC_SOCKET_TYPE_CLIENT:
1693 SilcClientEntry client;
1694 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1696 /* Verify whether this connection is after all allowed to connect */
1697 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1698 &server->config->param,
1699 conn->param, ctx->ske)) {
1700 server->stat.auth_failures++;
1704 /* If we are primary router and we have backup router configured
1705 but it has not connected to use yet, do not accept any other
1707 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1708 !server->backup_router) {
1709 SilcServerConfigRouter *router;
1710 router = silc_server_config_get_backup_router(server);
1711 if (router && strcmp(server->config->server_info->primary->server_ip,
1713 silc_server_find_socket_by_host(server,
1714 SILC_SOCKET_TYPE_SERVER,
1715 router->backup_replace_ip, 0)) {
1716 SILC_LOG_INFO(("Will not accept connections because we do "
1717 "not have backup router connection established"));
1718 silc_server_disconnect_remote(server, sock,
1719 SILC_STATUS_ERR_PERM_DENIED,
1720 "We do not have connection to backup "
1721 "router established, try later");
1722 silc_free(sock->user_data);
1723 server->stat.auth_failures++;
1725 /* From here on, wait 10 seconds for the backup router to appear. */
1726 silc_schedule_task_add(server->schedule, 0,
1727 silc_server_backup_router_wait,
1728 (void *)server, 10, 0,
1729 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1734 SILC_LOG_DEBUG(("Remote host is client"));
1735 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1738 /* Add the client to the client ID cache. The nickname and Client ID
1739 and other information is created after we have received NEW_CLIENT
1740 packet from client. */
1741 client = silc_idlist_add_client(server->local_list,
1742 NULL, NULL, NULL, NULL, NULL, sock, 0);
1744 SILC_LOG_ERROR(("Could not add new client to cache"));
1745 silc_free(sock->user_data);
1746 silc_server_disconnect_remote(server, sock,
1747 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1748 server->stat.auth_failures++;
1751 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1754 server->stat.my_clients++;
1755 server->stat.clients++;
1756 server->stat.cell_clients++;
1758 /* Get connection parameters */
1760 if (conn->param->keepalive_secs)
1761 hearbeat_timeout = conn->param->keepalive_secs;
1764 id_entry = (void *)client;
1767 case SILC_SOCKET_TYPE_SERVER:
1768 case SILC_SOCKET_TYPE_ROUTER:
1770 SilcServerEntry new_server;
1771 bool initiator = FALSE;
1772 bool backup_local = FALSE;
1773 bool backup_router = FALSE;
1774 char *backup_replace_ip = NULL;
1775 SilcUInt16 backup_replace_port = 0;
1776 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1777 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1779 /* If we are backup router and this is incoming server connection
1780 and we do not have connection to primary router, do not allow
1782 if (server->server_type == SILC_BACKUP_ROUTER &&
1783 ctx->conn_type == SILC_SOCKET_TYPE_SERVER &&
1784 !SILC_PRIMARY_ROUTE(server)) {
1785 SILC_LOG_INFO(("Will not accept server connection because we do "
1786 "not have primary router connection established"));
1787 silc_server_disconnect_remote(server, sock,
1788 SILC_STATUS_ERR_PERM_DENIED,
1789 "We do not have connection to primary "
1790 "router established, try later");
1791 silc_free(sock->user_data);
1792 server->stat.auth_failures++;
1796 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1797 /* Verify whether this connection is after all allowed to connect */
1798 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1799 &server->config->param,
1800 rconn ? rconn->param : NULL,
1802 silc_free(sock->user_data);
1803 server->stat.auth_failures++;
1809 if (rconn->param->keepalive_secs)
1810 hearbeat_timeout = rconn->param->keepalive_secs;
1813 initiator = rconn->initiator;
1814 backup_local = rconn->backup_local;
1815 backup_router = rconn->backup_router;
1816 backup_replace_ip = rconn->backup_replace_ip;
1817 backup_replace_port = rconn->backup_replace_port;
1821 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1822 /* Verify whether this connection is after all allowed to connect */
1823 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1824 &server->config->param,
1825 sconn ? sconn->param : NULL,
1827 silc_free(sock->user_data);
1828 server->stat.auth_failures++;
1833 if (sconn->param->keepalive_secs)
1834 hearbeat_timeout = sconn->param->keepalive_secs;
1837 backup_router = sconn->backup_router;
1841 /* If we are primary router and we have backup router configured
1842 but it has not connected to use yet, do not accept any other
1844 if (server->wait_backup && server->server_type == SILC_ROUTER &&
1845 !server->backup_router && !backup_router) {
1846 SilcServerConfigRouter *router;
1847 router = silc_server_config_get_backup_router(server);
1848 if (router && strcmp(server->config->server_info->primary->server_ip,
1850 silc_server_find_socket_by_host(server,
1851 SILC_SOCKET_TYPE_SERVER,
1852 router->backup_replace_ip, 0)) {
1853 SILC_LOG_INFO(("Will not accept connections because we do "
1854 "not have backup router connection established"));
1855 silc_server_disconnect_remote(server, sock,
1856 SILC_STATUS_ERR_PERM_DENIED,
1857 "We do not have connection to backup "
1858 "router established, try later");
1859 silc_free(sock->user_data);
1860 server->stat.auth_failures++;
1862 /* From here on, wait 10 seconds for the backup router to appear. */
1863 silc_schedule_task_add(server->schedule, 0,
1864 silc_server_backup_router_wait,
1865 (void *)server, 10, 0,
1866 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1871 SILC_LOG_DEBUG(("Remote host is %s",
1872 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1873 "server" : (backup_router ?
1874 "backup router" : "router")));
1875 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1876 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1877 "server" : (backup_router ?
1878 "backup router" : "router")));
1880 /* Add the server into server cache. The server name and Server ID
1881 is updated after we have received NEW_SERVER packet from the
1882 server. We mark ourselves as router for this server if we really
1885 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1886 server->local_list : (backup_router ?
1887 server->local_list :
1888 server->global_list)),
1890 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1891 SILC_SERVER : SILC_ROUTER),
1893 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1894 server->id_entry : (backup_router ?
1895 server->id_entry : NULL)),
1898 SILC_LOG_ERROR(("Could not add new server to cache"));
1899 silc_free(sock->user_data);
1900 silc_server_disconnect_remote(server, sock,
1901 SILC_STATUS_ERR_AUTH_FAILED, NULL);
1902 server->stat.auth_failures++;
1905 entry->data.status |= SILC_IDLIST_STATUS_LOCAL;
1907 id_entry = (void *)new_server;
1909 /* If the incoming connection is router and marked as backup router
1910 then add it to be one of our backups */
1911 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1912 silc_server_backup_add(server, new_server, backup_replace_ip,
1913 backup_replace_port, backup_local);
1915 /* Change it back to SERVER type since that's what it really is. */
1917 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1919 new_server->server_type = SILC_BACKUP_ROUTER;
1920 server->wait_backup = FALSE;
1924 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1925 server->stat.my_servers++;
1927 server->stat.my_routers++;
1928 server->stat.routers++;
1930 server->stat.servers++;
1932 /* Check whether this connection is to be our primary router connection
1933 if we do not already have the primary route. */
1934 if (!backup_router &&
1935 server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1936 if (silc_server_config_is_primary_route(server) && !initiator)
1939 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1940 server->standalone = FALSE;
1941 if (!server->id_entry->router) {
1942 server->id_entry->router = id_entry;
1943 server->router = id_entry;
1954 sock->type = ctx->conn_type;
1956 /* Add the common data structure to the ID entry. */
1957 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1959 /* Add to sockets internal pointer for fast referencing */
1960 silc_free(sock->user_data);
1961 sock->user_data = id_entry;
1963 /* Connection has been fully established now. Everything is ok. */
1964 SILC_LOG_DEBUG(("New connection authenticated"));
1966 /* Perform keepalive. The `hb_context' will be freed automatically
1967 when finally calling the silc_socket_free function. */
1968 hb_context = silc_calloc(1, sizeof(*hb_context));
1969 hb_context->server = server;
1970 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1971 silc_server_perform_heartbeat,
1975 silc_schedule_task_del_by_callback(server->schedule,
1976 silc_server_failure_callback);
1977 silc_protocol_free(protocol);
1979 silc_packet_context_free(ctx->packet);
1981 silc_ske_free(ctx->ske);
1982 silc_free(ctx->dest_id);
1983 silc_server_config_unref(&ctx->cconfig);
1984 silc_server_config_unref(&ctx->sconfig);
1985 silc_server_config_unref(&ctx->rconfig);
1987 sock->protocol = NULL;
1990 /* This function is used to read packets from network and send packets to
1991 network. This is usually a generic task. */
1993 SILC_TASK_CALLBACK(silc_server_packet_process)
1995 SilcServer server = (SilcServer)context;
1996 SilcSocketConnection sock = server->sockets[fd];
1997 SilcIDListData idata;
1998 SilcCipher cipher = NULL;
1999 SilcHmac hmac = NULL;
2000 SilcUInt32 sequence = 0;
2004 SILC_LOG_DEBUG(("Unknown socket connection"));
2008 /* Packet sending */
2010 if (type == SILC_TASK_WRITE) {
2011 /* Do not send data to disconnected connection */
2012 if (SILC_IS_DISCONNECTED(sock)) {
2013 SILC_LOG_DEBUG(("Disconnected socket connection, cannot send"));
2017 server->stat.packets_sent++;
2019 /* Send the packet */
2020 ret = silc_packet_send(sock, TRUE);
2022 /* If returned -2 could not write to connection now, will do
2028 SILC_LOG_ERROR(("Error sending packet to connection "
2029 "%s:%d [%s]", sock->hostname, sock->port,
2030 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2031 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2032 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2037 /* The packet has been sent and now it is time to set the connection
2038 back to only for input. When there is again some outgoing data
2039 available for this connection it will be set for output as well.
2040 This call clears the output setting and sets it only for input. */
2041 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
2042 SILC_UNSET_OUTBUF_PENDING(sock);
2044 silc_buffer_clear(sock->outbuf);
2048 /* Packet receiving */
2050 /* Read some data from connection */
2051 ret = silc_packet_receive(sock);
2055 SILC_LOG_ERROR(("Error receiving packet from connection "
2056 "%s:%d [%s] %s", sock->hostname, sock->port,
2057 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2058 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2059 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2060 "Router"), strerror(errno)));
2066 SILC_LOG_DEBUG(("Read EOF"));
2068 /* If connection is disconnecting already we will finally
2069 close the connection */
2070 if (SILC_IS_DISCONNECTING(sock)) {
2071 if (sock->user_data)
2072 silc_server_free_sock_user_data(server, sock, NULL);
2073 silc_server_close_connection(server, sock);
2077 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
2078 SILC_SET_DISCONNECTING(sock);
2080 if (sock->user_data) {
2082 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
2083 silc_server_free_sock_user_data(server, sock, tmp);
2085 silc_server_free_sock_user_data(server, sock, NULL);
2086 } else if (server->router_conn && server->router_conn->sock == sock &&
2087 !server->router && server->standalone)
2088 silc_schedule_task_add(server->schedule, 0,
2089 silc_server_connect_to_router,
2092 SILC_TASK_PRI_NORMAL);
2094 silc_server_close_connection(server, sock);
2098 /* If connection is disconnecting or disconnected we will ignore
2100 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
2101 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
2105 /* Get keys and stuff from ID entry */
2106 idata = (SilcIDListData)sock->user_data;
2108 cipher = idata->receive_key;
2109 hmac = idata->hmac_receive;
2110 sequence = idata->psn_receive;
2113 /* Process the packet. This will call the parser that will then
2114 decrypt and parse the packet. */
2115 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2116 TRUE : FALSE, cipher, hmac, sequence,
2117 silc_server_packet_parse, server);
2119 /* If this socket connection is not authenticated yet and the packet
2120 processing failed we will drop the connection since it can be
2121 a malicious flooder. */
2122 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
2123 (!sock->protocol || sock->protocol->protocol->type ==
2124 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
2125 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
2126 SILC_SET_DISCONNECTING(sock);
2128 if (sock->user_data)
2129 silc_server_free_sock_user_data(server, sock, NULL);
2130 silc_server_close_connection(server, sock);
2134 /* Parses whole packet, received earlier. */
2136 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
2138 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
2139 SilcServer server = (SilcServer)parse_ctx->context;
2140 SilcSocketConnection sock = parse_ctx->sock;
2141 SilcPacketContext *packet = parse_ctx->packet;
2142 SilcIDListData idata = (SilcIDListData)sock->user_data;
2145 server->stat.packets_received++;
2147 /* Parse the packet */
2148 if (parse_ctx->normal)
2149 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
2151 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
2153 /* If entry is disabled ignore what we got. */
2154 if (ret != SILC_PACKET_RESUME_ROUTER &&
2155 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
2156 SILC_LOG_DEBUG(("Connection is disabled"));
2160 if (ret == SILC_PACKET_NONE) {
2161 SILC_LOG_DEBUG(("Error parsing packet"));
2165 /* Check that the the current client ID is same as in the client's packet. */
2166 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
2167 SilcClientEntry client = (SilcClientEntry)sock->user_data;
2168 if (client && client->id && packet->src_id) {
2169 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
2170 packet->src_id_type);
2171 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
2173 SILC_LOG_DEBUG(("Packet source is not same as sender"));
2180 if (server->server_type == SILC_ROUTER) {
2181 /* Route the packet if it is not destined to us. Other ID types but
2182 server are handled separately after processing them. */
2183 if (packet->dst_id && !(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
2184 packet->dst_id_type == SILC_ID_SERVER &&
2185 sock->type != SILC_SOCKET_TYPE_CLIENT &&
2186 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
2188 /* Route the packet to fastest route for the destination ID */
2189 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
2190 packet->dst_id_type);
2193 silc_server_packet_route(server,
2194 silc_server_route_get(server, id,
2195 packet->dst_id_type),
2202 /* Parse the incoming packet type */
2203 silc_server_packet_parse_type(server, sock, packet);
2205 /* Broadcast packet if it is marked as broadcast packet and it is
2206 originated from router and we are router. */
2207 if (server->server_type == SILC_ROUTER &&
2208 sock->type == SILC_SOCKET_TYPE_ROUTER &&
2209 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
2210 /* Broadcast to our primary route */
2211 silc_server_packet_broadcast(server, SILC_PRIMARY_ROUTE(server), packet);
2213 /* If we have backup routers then we need to feed all broadcast
2214 data to those servers. */
2215 silc_server_backup_broadcast(server, sock, packet);
2219 silc_packet_context_free(packet);
2220 silc_free(parse_ctx);
2223 /* Parser callback called by silc_packet_receive_process. This merely
2224 registers timeout that will handle the actual parsing when appropriate. */
2226 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
2229 SilcServer server = (SilcServer)context;
2230 SilcSocketConnection sock = parser_context->sock;
2231 SilcIDListData idata = (SilcIDListData)sock->user_data;
2234 idata->psn_receive = parser_context->packet->sequence + 1;
2236 /* If protocol for this connection is key exchange or rekey then we'll
2237 process all packets synchronously, since there might be packets in
2238 queue that we are not able to decrypt without first processing the
2239 packets before them. */
2240 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
2241 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
2242 (sock->protocol && sock->protocol->protocol &&
2243 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2244 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
2245 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2248 /* Reprocess data since we'll return FALSE here. This is because
2249 the idata->receive_key might have become valid in the last packet
2250 and we want to call this processor with valid cipher. */
2252 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2253 TRUE : FALSE, idata->receive_key,
2254 idata->hmac_receive, idata->psn_receive,
2255 silc_server_packet_parse, server);
2257 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
2258 TRUE : FALSE, NULL, NULL, 0,
2259 silc_server_packet_parse, server);
2263 switch (sock->type) {
2264 case SILC_SOCKET_TYPE_UNKNOWN:
2265 case SILC_SOCKET_TYPE_CLIENT:
2266 /* Parse the packet with timeout */
2267 silc_schedule_task_add(server->schedule, sock->sock,
2268 silc_server_packet_parse_real,
2269 (void *)parser_context, 0, 100000,
2271 SILC_TASK_PRI_NORMAL);
2273 case SILC_SOCKET_TYPE_SERVER:
2274 case SILC_SOCKET_TYPE_ROUTER:
2275 /* Packets from servers are parsed immediately */
2276 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
2286 /* Parses the packet type and calls what ever routines the packet type
2287 requires. This is done for all incoming packets. */
2289 void silc_server_packet_parse_type(SilcServer server,
2290 SilcSocketConnection sock,
2291 SilcPacketContext *packet)
2293 SilcPacketType type = packet->type;
2294 SilcIDListData idata = (SilcIDListData)sock->user_data;
2296 SILC_LOG_DEBUG(("Received %s packet [flags %d]",
2297 silc_get_packet_name(type), packet->flags));
2299 /* Parse the packet type */
2301 case SILC_PACKET_DISCONNECT:
2304 char *message = NULL;
2306 if (packet->flags & SILC_PACKET_FLAG_LIST)
2308 if (packet->buffer->len < 1)
2311 status = (SilcStatus)packet->buffer->data[0];
2312 if (packet->buffer->len > 1 &&
2313 silc_utf8_valid(packet->buffer->data + 1, packet->buffer->len - 1))
2314 message = silc_memdup(packet->buffer->data + 1,
2315 packet->buffer->len - 1);
2317 SILC_LOG_INFO(("Disconnected by %s (%s): %s (%d) %s",
2318 sock->ip, sock->hostname,
2319 silc_get_status_message(status), status,
2320 message ? message : ""));
2323 /* Handle the disconnection from our end too */
2324 if (sock->user_data && SILC_IS_LOCAL(sock->user_data))
2325 silc_server_free_sock_user_data(server, sock, NULL);
2326 silc_server_close_connection(server, sock);
2330 case SILC_PACKET_SUCCESS:
2332 * Success received for something. For now we can have only
2333 * one protocol for connection executing at once hence this
2334 * success message is for whatever protocol is executing currently.
2336 if (packet->flags & SILC_PACKET_FLAG_LIST)
2339 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2342 case SILC_PACKET_FAILURE:
2344 * Failure received for something. For now we can have only
2345 * one protocol for connection executing at once hence this
2346 * failure message is for whatever protocol is executing currently.
2348 if (packet->flags & SILC_PACKET_FLAG_LIST)
2350 if (sock->protocol) {
2351 SilcServerFailureContext f;
2352 f = silc_calloc(1, sizeof(*f));
2356 /* We will wait 5 seconds to process this failure packet */
2357 silc_schedule_task_add(server->schedule, sock->sock,
2358 silc_server_failure_callback, (void *)f, 5, 0,
2359 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2363 case SILC_PACKET_REJECT:
2364 if (packet->flags & SILC_PACKET_FLAG_LIST)
2369 case SILC_PACKET_NOTIFY:
2371 * Received notify packet. Server can receive notify packets from
2372 * router. Server then relays the notify messages to clients if needed.
2374 if (packet->flags & SILC_PACKET_FLAG_LIST)
2375 silc_server_notify_list(server, sock, packet);
2377 silc_server_notify(server, sock, packet);
2383 case SILC_PACKET_CHANNEL_MESSAGE:
2385 * Received channel message. Channel messages are special packets
2386 * (although probably most common ones) thus they are handled
2389 if (packet->flags & SILC_PACKET_FLAG_LIST)
2391 idata->last_receive = time(NULL);
2392 silc_server_channel_message(server, sock, packet);
2395 case SILC_PACKET_CHANNEL_KEY:
2397 * Received key for channel. As channels are created by the router
2398 * the keys are as well. We will distribute the key to all of our
2399 * locally connected clients on the particular channel. Router
2400 * never receives this channel and thus is ignored.
2402 if (packet->flags & SILC_PACKET_FLAG_LIST)
2404 silc_server_channel_key(server, sock, packet);
2410 case SILC_PACKET_COMMAND:
2412 * Recived command. Processes the command request and allocates the
2413 * command context and calls the command.
2415 if (packet->flags & SILC_PACKET_FLAG_LIST)
2417 silc_server_command_process(server, sock, packet);
2420 case SILC_PACKET_COMMAND_REPLY:
2422 * Received command reply packet. Received command reply to command. It
2423 * may be reply to command sent by us or reply to command sent by client
2424 * that we've routed further.
2426 if (packet->flags & SILC_PACKET_FLAG_LIST)
2428 silc_server_command_reply(server, sock, packet);
2432 * Private Message packets
2434 case SILC_PACKET_PRIVATE_MESSAGE:
2436 * Received private message packet. The packet is coming from either
2439 if (packet->flags & SILC_PACKET_FLAG_LIST)
2441 idata->last_receive = time(NULL);
2442 silc_server_private_message(server, sock, packet);
2445 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2447 * Private message key packet.
2449 if (packet->flags & SILC_PACKET_FLAG_LIST)
2451 silc_server_private_message_key(server, sock, packet);
2455 * Key Exchange protocol packets
2457 case SILC_PACKET_KEY_EXCHANGE:
2458 if (packet->flags & SILC_PACKET_FLAG_LIST)
2461 if (sock->protocol && sock->protocol->protocol &&
2462 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2463 SilcServerKEInternalContext *proto_ctx =
2464 (SilcServerKEInternalContext *)sock->protocol->context;
2466 proto_ctx->packet = silc_packet_context_dup(packet);
2468 /* Let the protocol handle the packet */
2469 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2471 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2472 "protocol active, packet dropped."));
2476 case SILC_PACKET_KEY_EXCHANGE_1:
2477 if (packet->flags & SILC_PACKET_FLAG_LIST)
2480 if (sock->protocol && sock->protocol->protocol &&
2481 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2482 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2484 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2485 SilcServerRekeyInternalContext *proto_ctx =
2486 (SilcServerRekeyInternalContext *)sock->protocol->context;
2488 if (proto_ctx->packet)
2489 silc_packet_context_free(proto_ctx->packet);
2491 proto_ctx->packet = silc_packet_context_dup(packet);
2493 /* Let the protocol handle the packet */
2494 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2496 SilcServerKEInternalContext *proto_ctx =
2497 (SilcServerKEInternalContext *)sock->protocol->context;
2499 if (proto_ctx->packet)
2500 silc_packet_context_free(proto_ctx->packet);
2502 proto_ctx->packet = silc_packet_context_dup(packet);
2503 proto_ctx->dest_id_type = packet->src_id_type;
2504 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2505 packet->src_id_type);
2506 if (!proto_ctx->dest_id)
2509 /* Let the protocol handle the packet */
2510 silc_protocol_execute(sock->protocol, server->schedule,
2514 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2515 "protocol active, packet dropped."));
2519 case SILC_PACKET_KEY_EXCHANGE_2:
2520 if (packet->flags & SILC_PACKET_FLAG_LIST)
2523 if (sock->protocol && sock->protocol->protocol &&
2524 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2525 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2527 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2528 SilcServerRekeyInternalContext *proto_ctx =
2529 (SilcServerRekeyInternalContext *)sock->protocol->context;
2531 if (proto_ctx->packet)
2532 silc_packet_context_free(proto_ctx->packet);
2534 proto_ctx->packet = silc_packet_context_dup(packet);
2536 /* Let the protocol handle the packet */
2537 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2539 SilcServerKEInternalContext *proto_ctx =
2540 (SilcServerKEInternalContext *)sock->protocol->context;
2542 if (proto_ctx->packet)
2543 silc_packet_context_free(proto_ctx->packet);
2545 proto_ctx->packet = silc_packet_context_dup(packet);
2546 proto_ctx->dest_id_type = packet->src_id_type;
2547 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2548 packet->src_id_type);
2549 if (!proto_ctx->dest_id)
2552 /* Let the protocol handle the packet */
2553 silc_protocol_execute(sock->protocol, server->schedule,
2557 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2558 "protocol active, packet dropped."));
2562 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2564 * Connection authentication request packet. When we receive this packet
2565 * we will send to the other end information about our mandatory
2566 * authentication method for the connection. This packet maybe received
2569 if (packet->flags & SILC_PACKET_FLAG_LIST)
2571 silc_server_connection_auth_request(server, sock, packet);
2575 * Connection Authentication protocol packets
2577 case SILC_PACKET_CONNECTION_AUTH:
2578 /* Start of the authentication protocol. We receive here the
2579 authentication data and will verify it. */
2580 if (packet->flags & SILC_PACKET_FLAG_LIST)
2583 if (sock->protocol && sock->protocol->protocol->type
2584 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2586 SilcServerConnAuthInternalContext *proto_ctx =
2587 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2589 proto_ctx->packet = silc_packet_context_dup(packet);
2591 /* Let the protocol handle the packet */
2592 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2594 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2595 "protocol active, packet dropped."));
2599 case SILC_PACKET_NEW_ID:
2601 * Received New ID packet. This includes some new ID that has been
2602 * created. It may be for client, server or channel. This is the way
2603 * to distribute information about new registered entities in the
2606 if (packet->flags & SILC_PACKET_FLAG_LIST)
2607 silc_server_new_id_list(server, sock, packet);
2609 silc_server_new_id(server, sock, packet);
2612 case SILC_PACKET_NEW_CLIENT:
2614 * Received new client packet. This includes client information that
2615 * we will use to create initial client ID. After creating new
2616 * ID we will send it to the client.
2618 if (packet->flags & SILC_PACKET_FLAG_LIST)
2620 silc_server_new_client(server, sock, packet);
2623 case SILC_PACKET_NEW_SERVER:
2625 * Received new server packet. This includes Server ID and some other
2626 * information that we may save. This is received after server has
2629 if (packet->flags & SILC_PACKET_FLAG_LIST)
2631 silc_server_new_server(server, sock, packet);
2634 case SILC_PACKET_NEW_CHANNEL:
2636 * Received new channel packet. Information about new channel in the
2637 * network are distributed using this packet.
2639 if (packet->flags & SILC_PACKET_FLAG_LIST)
2640 silc_server_new_channel_list(server, sock, packet);
2642 silc_server_new_channel(server, sock, packet);
2645 case SILC_PACKET_HEARTBEAT:
2647 * Received heartbeat.
2649 if (packet->flags & SILC_PACKET_FLAG_LIST)
2653 case SILC_PACKET_KEY_AGREEMENT:
2655 * Received heartbeat.
2657 if (packet->flags & SILC_PACKET_FLAG_LIST)
2659 silc_server_key_agreement(server, sock, packet);
2662 case SILC_PACKET_REKEY:
2664 * Received re-key packet. The sender wants to regenerate the session
2667 if (packet->flags & SILC_PACKET_FLAG_LIST)
2669 silc_server_rekey(server, sock, packet);
2672 case SILC_PACKET_REKEY_DONE:
2674 * The re-key is done.
2676 if (packet->flags & SILC_PACKET_FLAG_LIST)
2679 if (sock->protocol && sock->protocol->protocol &&
2680 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2682 SilcServerRekeyInternalContext *proto_ctx =
2683 (SilcServerRekeyInternalContext *)sock->protocol->context;
2685 if (proto_ctx->packet)
2686 silc_packet_context_free(proto_ctx->packet);
2688 proto_ctx->packet = silc_packet_context_dup(packet);
2690 /* Let the protocol handle the packet */
2691 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2693 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2694 "protocol active, packet dropped."));
2698 case SILC_PACKET_FTP:
2700 if (packet->flags & SILC_PACKET_FLAG_LIST)
2702 silc_server_ftp(server, sock, packet);
2705 case SILC_PACKET_RESUME_CLIENT:
2707 if (packet->flags & SILC_PACKET_FLAG_LIST)
2709 silc_server_resume_client(server, sock, packet);
2712 case SILC_PACKET_RESUME_ROUTER:
2713 /* Resume router packet received. This packet is received for backup
2714 router resuming protocol. */
2715 if (packet->flags & SILC_PACKET_FLAG_LIST)
2717 silc_server_backup_resume_router(server, sock, packet);
2721 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2726 /* Creates connection to a remote router. */
2728 void silc_server_create_connection(SilcServer server,
2729 const char *remote_host, SilcUInt32 port)
2731 SilcServerConnection sconn;
2733 /* Allocate connection object for hold connection specific stuff. */
2734 sconn = silc_calloc(1, sizeof(*sconn));
2735 sconn->server = server;
2736 sconn->remote_host = strdup(remote_host);
2737 sconn->remote_port = port;
2738 sconn->no_reconnect = TRUE;
2740 silc_schedule_task_add(server->schedule, 0,
2741 silc_server_connect_router,
2742 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2743 SILC_TASK_PRI_NORMAL);
2746 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2748 silc_socket_free(context);
2751 /* Closes connection to socket connection */
2753 void silc_server_close_connection(SilcServer server,
2754 SilcSocketConnection sock)
2756 if (!server->sockets[sock->sock] && SILC_IS_DISCONNECTED(sock)) {
2757 silc_schedule_task_add(server->schedule, 0,
2758 silc_server_close_connection_final,
2759 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2760 SILC_TASK_PRI_NORMAL);
2764 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2766 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2767 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2768 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2771 /* We won't listen for this connection anymore */
2772 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2774 /* Unregister all tasks */
2775 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2777 /* Close the actual connection */
2778 silc_net_close_connection(sock->sock);
2779 server->sockets[sock->sock] = NULL;
2781 /* If sock->user_data is NULL then we'll check for active protocols
2782 here since the silc_server_free_sock_user_data has not been called
2783 for this connection. */
2784 if (!sock->user_data) {
2785 /* If any protocol is active cancel its execution. It will call
2786 the final callback which will finalize the disconnection. */
2787 if (sock->protocol) {
2788 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
2789 silc_protocol_cancel(sock->protocol, server->schedule);
2790 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2791 silc_protocol_execute_final(sock->protocol, server->schedule);
2792 sock->protocol = NULL;
2797 silc_schedule_task_add(server->schedule, 0,
2798 silc_server_close_connection_final,
2799 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2800 SILC_TASK_PRI_NORMAL);
2803 /* Sends disconnect message to remote connection and disconnects the
2806 void silc_server_disconnect_remote(SilcServer server,
2807 SilcSocketConnection sock,
2808 SilcStatus status, ...)
2811 unsigned char buf[512];
2819 memset(buf, 0, sizeof(buf));
2820 va_start(ap, status);
2821 cp = va_arg(ap, char *);
2823 vsnprintf(buf, sizeof(buf) - 1, cp, ap);
2828 SILC_LOG_DEBUG(("Disconnecting remote host"));
2830 /* Notify remote end that the conversation is over. The notify message
2831 is tried to be sent immediately. */
2835 len += silc_utf8_encoded_len(buf, strlen(buf), SILC_STRING_ASCII);
2837 buffer = silc_buffer_alloc_size(len);
2841 buffer->data[0] = status;
2843 silc_utf8_encode(buf, strlen(buf), SILC_STRING_ASCII, buffer->data + 1,
2845 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2846 buffer->data, buffer->len, TRUE);
2847 silc_buffer_free(buffer);
2850 silc_server_packet_queue_purge(server, sock);
2852 /* Mark the connection to be disconnected */
2853 SILC_SET_DISCONNECTED(sock);
2854 silc_server_close_connection(server, sock);
2859 SilcClientEntry client;
2860 } *FreeClientInternal;
2862 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2864 FreeClientInternal i = (FreeClientInternal)context;
2866 silc_idlist_del_data(i->client);
2867 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2871 /* Frees client data and notifies about client's signoff. */
2873 void silc_server_free_client_data(SilcServer server,
2874 SilcSocketConnection sock,
2875 SilcClientEntry client,
2877 const char *signoff)
2879 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2881 SILC_LOG_DEBUG(("Freeing client data"));
2884 if (!client->router && !client->connection &&
2885 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2886 SILC_LOG_ERROR(("****** freeing data for already unregistered client -s"));
2887 SILC_LOG_ERROR(("****** Contact Pekka"));
2888 SILC_LOG_ERROR(("****** freeing data for already unregistered client -e"));
2893 /* If there is pending outgoing data for the client then purge it
2894 to the network before removing the client entry. */
2895 silc_server_packet_queue_purge(server, sock);
2898 /* Check if anyone is watching this nickname */
2899 if (server->server_type == SILC_ROUTER)
2900 silc_server_check_watcher_list(server, client, NULL,
2901 SILC_NOTIFY_TYPE_SIGNOFF);
2903 /* Send SIGNOFF notify to routers. */
2905 silc_server_send_notify_signoff(server, SILC_PRIMARY_ROUTE(server),
2906 SILC_BROADCAST(server), client->id,
2910 /* Remove client from all channels */
2912 silc_server_remove_from_channels(server, NULL, client,
2913 TRUE, (char *)signoff, TRUE);
2915 silc_server_remove_from_channels(server, NULL, client,
2916 FALSE, NULL, FALSE);
2918 /* Remove this client from watcher list if it is */
2919 silc_server_del_from_watcher_list(server, client);
2921 /* Update statistics */
2922 server->stat.my_clients--;
2923 server->stat.clients--;
2924 if (server->stat.cell_clients)
2925 server->stat.cell_clients--;
2926 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2927 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2928 silc_schedule_task_del_by_context(server->schedule, client);
2930 /* We will not delete the client entry right away. We will take it
2931 into history (for WHOWAS command) for 5 minutes */
2934 silc_schedule_task_add(server->schedule, 0,
2935 silc_server_free_client_data_timeout,
2937 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2938 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2940 client->router = NULL;
2941 client->connection = NULL;
2944 /* Frees user_data pointer from socket connection object. This also sends
2945 appropriate notify packets to the network to inform about leaving
2948 void silc_server_free_sock_user_data(SilcServer server,
2949 SilcSocketConnection sock,
2950 const char *signoff_message)
2952 switch (sock->type) {
2953 case SILC_SOCKET_TYPE_CLIENT:
2955 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2956 silc_server_free_client_data(server, sock, user_data, TRUE,
2960 case SILC_SOCKET_TYPE_SERVER:
2961 case SILC_SOCKET_TYPE_ROUTER:
2963 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2964 SilcServerEntry backup_router = NULL;
2966 SILC_LOG_DEBUG(("Freeing server data"));
2969 backup_router = silc_server_backup_get(server, user_data->id);
2971 /* If this was our primary router connection then we're lost to
2972 the outside world. */
2973 if (server->router == user_data) {
2974 /* Check whether we have a backup router connection */
2975 if (!backup_router || backup_router == user_data) {
2976 silc_schedule_task_add(server->schedule, 0,
2977 silc_server_connect_to_router,
2980 SILC_TASK_PRI_NORMAL);
2982 server->id_entry->router = NULL;
2983 server->router = NULL;
2984 server->standalone = TRUE;
2985 backup_router = NULL;
2987 if (server->id_entry != backup_router) {
2988 SILC_LOG_INFO(("New primary router is backup router %s",
2989 backup_router->server_name));
2990 server->id_entry->router = backup_router;
2991 server->router = backup_router;
2992 server->router_connect = time(0);
2993 server->backup_primary = TRUE;
2995 SILC_LOG_INFO(("We are now new primary router in this cell"));
2996 server->id_entry->router = NULL;
2997 server->router = NULL;
2998 server->standalone = TRUE;
3001 if (server->server_type == SILC_BACKUP_ROUTER) {
3002 server->server_type = SILC_ROUTER;
3004 /* We'll need to constantly try to reconnect to the primary
3005 router so that we'll see when it comes back online. */
3006 silc_server_backup_reconnect(server, sock->ip, sock->port,
3007 silc_server_backup_connected,
3011 /* Mark this connection as replaced */
3012 silc_server_backup_replaced_add(server, user_data->id,
3015 } else if (backup_router) {
3016 SILC_LOG_INFO(("Enabling the use of backup router %s",
3017 backup_router->server_name));
3018 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
3019 backup_router->server_name));
3021 /* Mark this connection as replaced */
3022 silc_server_backup_replaced_add(server, user_data->id,
3026 if (!backup_router) {
3027 /* As router, remove clients and channels always. As normal server
3028 remove only if it is our primary router. Other connections
3029 may be backup routers and these normal server don't handle here. */
3030 if (server->server_type != SILC_SERVER ||
3031 server->standalone || sock == SILC_PRIMARY_ROUTE(server)) {
3032 /* Free all client entries that this server owns as they will
3033 become invalid now as well. */
3034 silc_server_remove_clients_by_server(server, user_data, TRUE);
3035 if (server->server_type == SILC_SERVER)
3036 silc_server_remove_channels_by_server(server, user_data);
3039 /* Update the client entries of this server to the new backup
3040 router. This also removes the clients that *really* was owned
3041 by the primary router and went down with the router. */
3042 silc_server_local_servers_toggle_enabled(server, TRUE);
3043 silc_server_update_clients_by_server(server, user_data, backup_router,
3045 silc_server_update_servers_by_server(server, user_data, backup_router);
3046 if (server->server_type == SILC_SERVER)
3047 silc_server_update_channels_by_server(server, user_data,
3050 /* Send notify about primary router going down to local operators */
3051 if (server->backup_router)
3052 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3053 SILC_NOTIFY_TYPE_NONE,
3054 ("%s switched to backup router %s "
3055 "(we are primary router now)",
3056 server->server_name, server->server_name));
3058 SILC_SERVER_SEND_OPERS(server, FALSE, TRUE,
3059 SILC_NOTIFY_TYPE_NONE,
3060 ("%s switched to backup router %s",
3061 server->server_name,
3062 server->router->server_name));
3065 /* Free the server entry */
3066 silc_server_backup_del(server, user_data);
3067 silc_server_backup_replaced_del(server, user_data);
3068 silc_idlist_del_data(user_data);
3069 if (!silc_idlist_del_server(server->local_list, user_data))
3070 silc_idlist_del_server(server->global_list, user_data);
3071 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
3072 server->stat.my_servers--;
3074 server->stat.my_routers--;
3075 server->stat.routers--;
3077 server->stat.servers--;
3078 if (server->server_type == SILC_ROUTER)
3079 server->stat.cell_servers--;
3081 if (backup_router && backup_router != server->id_entry) {
3082 /* Announce all of our stuff that was created about 5 minutes ago.
3083 The backup router knows all the other stuff already. */
3084 if (server->server_type == SILC_ROUTER)
3085 silc_server_announce_servers(server, FALSE, time(0) - 300,
3086 backup_router->connection);
3088 /* Announce our clients and channels to the router */
3089 silc_server_announce_clients(server, time(0) - 300,
3090 backup_router->connection);
3091 silc_server_announce_channels(server, time(0) - 300,
3092 backup_router->connection);
3098 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
3100 SILC_LOG_DEBUG(("Freeing unknown connection data"));
3102 silc_idlist_del_data(user_data);
3103 silc_free(user_data);
3108 /* If any protocol is active cancel its execution */
3109 if (sock->protocol) {
3110 SILC_LOG_DEBUG(("Cancelling protocol, calling final callback"));
3111 silc_protocol_cancel(sock->protocol, server->schedule);
3112 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3113 silc_protocol_execute_final(sock->protocol, server->schedule);
3114 sock->protocol = NULL;
3117 sock->user_data = NULL;
3120 /* Removes client from all channels it has joined. This is used when client
3121 connection is disconnected. If the client on a channel is last, the
3122 channel is removed as well. This sends the SIGNOFF notify types. */
3124 void silc_server_remove_from_channels(SilcServer server,
3125 SilcSocketConnection sock,
3126 SilcClientEntry client,
3128 const char *signoff_message,
3131 SilcChannelEntry channel;
3132 SilcChannelClientEntry chl;
3133 SilcHashTableList htl;
3134 SilcBuffer clidp = NULL;
3139 SILC_LOG_DEBUG(("Removing client from joined channels"));
3141 if (notify && !client->id)
3145 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3150 /* Remove the client from all channels. The client is removed from
3151 the channels' user list. */
3152 silc_hash_table_list(client->channels, &htl);
3153 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3154 channel = chl->channel;
3156 /* Remove channel if this is last client leaving the channel, unless
3157 the channel is permanent. */
3158 if (server->server_type == SILC_ROUTER &&
3159 silc_hash_table_count(channel->user_list) < 2) {
3160 silc_server_channel_delete(server, channel);
3164 silc_hash_table_del(client->channels, channel);
3165 silc_hash_table_del(channel->user_list, chl->client);
3166 channel->user_count--;
3168 /* If there is no global users on the channel anymore mark the channel
3169 as local channel. Do not check if the removed client is local client. */
3170 if (server->server_type != SILC_ROUTER && channel->global_users &&
3171 chl->client->router && !silc_server_channel_has_global(channel))
3172 channel->global_users = FALSE;
3176 /* Update statistics */
3177 if (SILC_IS_LOCAL(client))
3178 server->stat.my_chanclients--;
3179 if (server->server_type == SILC_ROUTER) {
3180 server->stat.cell_chanclients--;
3181 server->stat.chanclients--;
3184 /* If there is not at least one local user on the channel then we don't
3185 need the channel entry anymore, we can remove it safely, unless the
3186 channel is permanent channel */
3187 if (server->server_type != SILC_ROUTER &&
3188 !silc_server_channel_has_local(channel)) {
3189 /* Notify about leaving client if this channel has global users. */
3190 if (notify && channel->global_users)
3191 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3192 SILC_NOTIFY_TYPE_SIGNOFF,
3193 signoff_message ? 2 : 1,
3194 clidp->data, clidp->len,
3195 signoff_message, signoff_message ?
3196 strlen(signoff_message) : 0);
3198 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3199 silc_server_channel_delete(server, channel);
3203 /* Send notify to channel about client leaving SILC and channel too */
3205 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3206 SILC_NOTIFY_TYPE_SIGNOFF,
3207 signoff_message ? 2 : 1,
3208 clidp->data, clidp->len,
3209 signoff_message, signoff_message ?
3210 strlen(signoff_message) : 0);
3212 /* Re-generate channel key if needed */
3213 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
3214 if (!silc_server_create_channel_key(server, channel, 0))
3217 /* Send the channel key to the channel. The key of course is not sent
3218 to the client who was removed from the channel. */
3219 silc_server_send_channel_key(server, client->connection, channel,
3220 server->server_type == SILC_ROUTER ?
3221 FALSE : !server->standalone);
3225 silc_hash_table_list_reset(&htl);
3227 silc_buffer_free(clidp);
3230 /* Removes client from one channel. This is used for example when client
3231 calls LEAVE command to remove itself from the channel. Returns TRUE
3232 if channel still exists and FALSE if the channel is removed when
3233 last client leaves the channel. If `notify' is FALSE notify messages
3236 bool silc_server_remove_from_one_channel(SilcServer server,
3237 SilcSocketConnection sock,
3238 SilcChannelEntry channel,
3239 SilcClientEntry client,
3242 SilcChannelClientEntry chl;
3245 SILC_LOG_DEBUG(("Removing %s from channel %s",
3246 silc_id_render(client->id, SILC_ID_CLIENT),
3247 channel->channel_name));
3249 /* Get the entry to the channel, if this client is not on the channel
3251 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
3254 /* Remove channel if this is last client leaving the channel, unless
3255 the channel is permanent. */
3256 if (server->server_type == SILC_ROUTER &&
3257 silc_hash_table_count(channel->user_list) < 2) {
3258 silc_server_channel_delete(server, channel);
3262 silc_hash_table_del(client->channels, chl->channel);
3263 silc_hash_table_del(channel->user_list, chl->client);
3264 channel->user_count--;
3266 /* If there is no global users on the channel anymore mark the channel
3267 as local channel. Do not check if the client is local client. */
3268 if (server->server_type != SILC_ROUTER && channel->global_users &&
3269 chl->client->router && !silc_server_channel_has_global(channel))
3270 channel->global_users = FALSE;
3274 /* Update statistics */
3275 if (SILC_IS_LOCAL(client))
3276 server->stat.my_chanclients--;
3277 if (server->server_type == SILC_ROUTER) {
3278 server->stat.cell_chanclients--;
3279 server->stat.chanclients--;
3282 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3286 /* If there is not at least one local user on the channel then we don't
3287 need the channel entry anymore, we can remove it safely, unless the
3288 channel is permanent channel */
3289 if (server->server_type != SILC_ROUTER &&
3290 !silc_server_channel_has_local(channel)) {
3291 /* Notify about leaving client if this channel has global users. */
3292 if (notify && channel->global_users)
3293 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3294 SILC_NOTIFY_TYPE_LEAVE, 1,
3295 clidp->data, clidp->len);
3297 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
3298 silc_server_channel_delete(server, channel);
3299 silc_buffer_free(clidp);
3303 /* Send notify to channel about client leaving the channel */
3305 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
3306 SILC_NOTIFY_TYPE_LEAVE, 1,
3307 clidp->data, clidp->len);
3309 silc_buffer_free(clidp);
3313 /* Timeout callback. This is called if connection is idle or for some
3314 other reason is not responding within some period of time. This
3315 disconnects the remote end. */
3317 SILC_TASK_CALLBACK(silc_server_timeout_remote)
3319 SilcServer server = (SilcServer)context;
3320 SilcSocketConnection sock = server->sockets[fd];
3321 SilcProtocolType protocol = 0;
3323 SILC_LOG_DEBUG(("Start"));
3328 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
3329 sock->hostname, sock->ip));
3331 /* If we have protocol active we must assure that we call the protocol's
3332 final callback so that all the memory is freed. */
3333 if (sock->protocol) {
3334 protocol = sock->protocol->protocol->type;
3335 silc_protocol_cancel(sock->protocol, server->schedule);
3336 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
3337 silc_protocol_execute_final(sock->protocol, server->schedule);
3338 sock->protocol = NULL;
3342 if (sock->user_data)
3343 silc_server_free_sock_user_data(server, sock, NULL);
3345 silc_server_disconnect_remote(server, sock,
3347 SILC_PROTOCOL_SERVER_CONNECTION_AUTH ?
3348 SILC_STATUS_ERR_AUTH_FAILED :
3349 SILC_STATUS_ERR_KEY_EXCHANGE_FAILED,
3350 "Connection timeout");
3353 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
3354 function may be used only by router. In real SILC network all channels
3355 are created by routers thus this function is never used by normal
3358 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
3359 SilcServerID *router_id,
3365 SilcChannelID *channel_id;
3366 SilcChannelEntry entry;
3370 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3373 cipher = SILC_DEFAULT_CIPHER;
3375 hmac = SILC_DEFAULT_HMAC;
3377 /* Allocate cipher */
3378 if (!silc_cipher_alloc(cipher, &key))
3382 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3383 silc_cipher_free(key);
3387 channel_name = strdup(channel_name);
3389 /* Create the channel ID */
3390 if (!silc_id_create_channel_id(server, router_id, server->rng,
3392 silc_free(channel_name);
3393 silc_cipher_free(key);
3394 silc_hmac_free(newhmac);
3398 /* Create the channel */
3399 entry = silc_idlist_add_channel(server->local_list, channel_name,
3400 SILC_CHANNEL_MODE_NONE, channel_id,
3401 NULL, key, newhmac, 0);
3403 silc_free(channel_name);
3404 silc_cipher_free(key);
3405 silc_hmac_free(newhmac);
3406 silc_free(channel_id);
3410 entry->cipher = strdup(cipher);
3411 entry->hmac_name = strdup(hmac);
3413 /* Now create the actual key material */
3414 if (!silc_server_create_channel_key(server, entry,
3415 silc_cipher_get_key_len(key) / 8)) {
3416 silc_idlist_del_channel(server->local_list, entry);
3420 /* Notify other routers about the new channel. We send the packet
3421 to our primary route. */
3423 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3424 channel_name, entry->id,
3425 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3428 /* Distribute to backup routers */
3429 if (broadcast && server->server_type == SILC_ROUTER) {
3432 SilcUInt32 name_len = strlen(channel_name);
3433 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3434 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3436 packet = silc_channel_payload_encode(channel_name, name_len,
3437 cid, channel_id_len, entry->mode);
3438 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3439 packet->data, packet->len, FALSE, TRUE);
3441 silc_buffer_free(packet);
3444 server->stat.my_channels++;
3445 if (server->server_type == SILC_ROUTER) {
3446 server->stat.channels++;
3447 server->stat.cell_channels++;
3448 entry->users_resolved = TRUE;
3454 /* Same as above but creates the channel with Channel ID `channel_id. */
3457 silc_server_create_new_channel_with_id(SilcServer server,
3461 SilcChannelID *channel_id,
3464 SilcChannelEntry entry;
3468 SILC_LOG_DEBUG(("Creating new channel %s", channel_name));
3471 cipher = SILC_DEFAULT_CIPHER;
3473 hmac = SILC_DEFAULT_HMAC;
3475 /* Allocate cipher */
3476 if (!silc_cipher_alloc(cipher, &key))
3480 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3481 silc_cipher_free(key);
3485 channel_name = strdup(channel_name);
3487 /* Create the channel */
3488 entry = silc_idlist_add_channel(server->local_list, channel_name,
3489 SILC_CHANNEL_MODE_NONE, channel_id,
3490 NULL, key, newhmac, 0);
3492 silc_cipher_free(key);
3493 silc_hmac_free(newhmac);
3494 silc_free(channel_name);
3498 /* Now create the actual key material */
3499 if (!silc_server_create_channel_key(server, entry,
3500 silc_cipher_get_key_len(key) / 8)) {
3501 silc_idlist_del_channel(server->local_list, entry);
3505 /* Notify other routers about the new channel. We send the packet
3506 to our primary route. */
3508 silc_server_send_new_channel(server, SILC_PRIMARY_ROUTE(server), TRUE,
3509 channel_name, entry->id,
3510 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3513 /* Distribute to backup routers */
3514 if (broadcast && server->server_type == SILC_ROUTER) {
3517 SilcUInt32 name_len = strlen(channel_name);
3518 SilcUInt32 channel_id_len = silc_id_get_len(entry->id, SILC_ID_CHANNEL);
3519 cid = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3521 packet = silc_channel_payload_encode(channel_name, name_len,
3522 cid, channel_id_len, entry->mode);
3523 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
3524 packet->data, packet->len, FALSE, TRUE);
3526 silc_buffer_free(packet);
3529 server->stat.my_channels++;
3530 if (server->server_type == SILC_ROUTER) {
3531 server->stat.channels++;
3532 server->stat.cell_channels++;
3533 entry->users_resolved = TRUE;
3539 /* Channel's key re-key timeout callback. */
3541 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3543 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3544 SilcServer server = (SilcServer)rekey->context;
3548 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3551 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3554 /* Generates new channel key. This is used to create the initial channel key
3555 but also to re-generate new key for channel. If `key_len' is provided
3556 it is the bytes of the key length. */
3558 bool silc_server_create_channel_key(SilcServer server,
3559 SilcChannelEntry channel,
3563 unsigned char channel_key[32], hash[32];
3566 SILC_LOG_DEBUG(("Generating channel key"));
3568 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3569 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3573 if (!channel->channel_key)
3574 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3575 channel->channel_key = NULL;
3581 else if (channel->key_len)
3582 len = channel->key_len / 8;
3584 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3586 /* Create channel key */
3587 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3590 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3592 /* Remove old key if exists */
3594 memset(channel->key, 0, channel->key_len / 8);
3595 silc_free(channel->key);
3599 channel->key_len = len * 8;
3600 channel->key = silc_memdup(channel_key, len);
3601 memset(channel_key, 0, sizeof(channel_key));
3603 /* Generate HMAC key from the channel key data and set it */
3605 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3606 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3607 silc_hmac_set_key(channel->hmac, hash,
3608 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3609 memset(hash, 0, sizeof(hash));
3611 if (server->server_type == SILC_ROUTER) {
3612 if (!channel->rekey)
3613 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3614 channel->rekey->context = (void *)server;
3615 channel->rekey->channel = channel;
3616 channel->rekey->key_len = key_len;
3617 if (channel->rekey->task)
3618 silc_schedule_task_del(server->schedule, channel->rekey->task);
3620 channel->rekey->task =
3621 silc_schedule_task_add(server->schedule, 0,
3622 silc_server_channel_key_rekey,
3623 (void *)channel->rekey,
3624 server->config->channel_rekey_secs, 0,
3626 SILC_TASK_PRI_NORMAL);
3632 /* Saves the channel key found in the encoded `key_payload' buffer. This
3633 function is used when we receive Channel Key Payload and also when we're
3634 processing JOIN command reply. Returns entry to the channel. */
3636 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3637 SilcBuffer key_payload,
3638 SilcChannelEntry channel)
3640 SilcChannelKeyPayload payload = NULL;
3641 SilcChannelID *id = NULL;
3642 unsigned char *tmp, hash[32];
3646 SILC_LOG_DEBUG(("Saving new channel key"));
3648 /* Decode channel key payload */
3649 payload = silc_channel_key_payload_parse(key_payload->data,
3652 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3657 /* Get the channel entry */
3660 /* Get channel ID */
3661 tmp = silc_channel_key_get_id(payload, &tmp_len);
3662 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3668 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3670 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3672 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3673 silc_id_render(id, SILC_ID_CHANNEL)));
3679 tmp = silc_channel_key_get_key(payload, &tmp_len);
3685 cipher = silc_channel_key_get_cipher(payload, NULL);
3691 /* Remove old key if exists */
3693 memset(channel->key, 0, channel->key_len / 8);
3694 silc_free(channel->key);
3695 silc_cipher_free(channel->channel_key);
3698 /* Create new cipher */
3699 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3700 channel->channel_key = NULL;
3705 if (channel->cipher)
3706 silc_free(channel->cipher);
3707 channel->cipher = strdup(cipher);
3710 channel->key_len = tmp_len * 8;
3711 channel->key = silc_memdup(tmp, tmp_len);
3712 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3714 /* Generate HMAC key from the channel key data and set it */
3716 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3717 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3718 silc_hmac_set_key(channel->hmac, hash,
3719 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3721 memset(hash, 0, sizeof(hash));
3722 memset(tmp, 0, tmp_len);
3724 if (server->server_type == SILC_ROUTER) {
3725 if (!channel->rekey)
3726 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3727 channel->rekey->context = (void *)server;
3728 channel->rekey->channel = channel;
3729 if (channel->rekey->task)
3730 silc_schedule_task_del(server->schedule, channel->rekey->task);
3732 channel->rekey->task =
3733 silc_schedule_task_add(server->schedule, 0,
3734 silc_server_channel_key_rekey,
3735 (void *)channel->rekey,
3736 server->config->channel_rekey_secs, 0,
3738 SILC_TASK_PRI_NORMAL);
3744 silc_channel_key_payload_free(payload);
3749 /* Heartbeat callback. This function is set as argument for the
3750 silc_socket_set_heartbeat function. The library will call this function
3751 at the set time interval. */
3753 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3756 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3758 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3760 /* Send the heartbeat */
3761 silc_server_send_heartbeat(hb->server, sock);
3764 /* Returns assembled of all servers in the given ID list. The packet's
3765 form is dictated by the New ID payload. */
3767 static void silc_server_announce_get_servers(SilcServer server,
3768 SilcServerEntry remote,
3770 SilcBuffer *servers,
3771 unsigned long creation_time)
3773 SilcIDCacheList list;
3774 SilcIDCacheEntry id_cache;
3775 SilcServerEntry entry;
3778 /* Go through all clients in the list */
3779 if (silc_idcache_get_all(id_list->servers, &list)) {
3780 if (silc_idcache_list_first(list, &id_cache)) {
3782 entry = (SilcServerEntry)id_cache->context;
3784 /* Do not announce the one we've sending our announcements and
3785 do not announce ourself. Also check the creation time if it's
3787 if ((entry == remote) || (entry == server->id_entry) ||
3788 (creation_time && entry->data.created < creation_time)) {
3789 if (!silc_idcache_list_next(list, &id_cache))
3794 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3796 *servers = silc_buffer_realloc(*servers,
3798 (*servers)->truelen + idp->len :
3800 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3801 silc_buffer_put(*servers, idp->data, idp->len);
3802 silc_buffer_pull(*servers, idp->len);
3803 silc_buffer_free(idp);
3805 if (!silc_idcache_list_next(list, &id_cache))
3810 silc_idcache_list_free(list);
3815 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3821 p = silc_notify_payload_encode(notify, argc, ap);
3827 /* This function is used by router to announce existing servers to our
3828 primary router when we've connected to it. If `creation_time' is non-zero
3829 then only the servers that has been created after the `creation_time'
3830 will be announced. */
3832 void silc_server_announce_servers(SilcServer server, bool global,
3833 unsigned long creation_time,
3834 SilcSocketConnection remote)
3836 SilcBuffer servers = NULL;
3838 SILC_LOG_DEBUG(("Announcing servers"));
3840 /* Get servers in local list */
3841 silc_server_announce_get_servers(server, remote->user_data,
3842 server->local_list, &servers,
3846 /* Get servers in global list */
3847 silc_server_announce_get_servers(server, remote->user_data,
3848 server->global_list, &servers,
3852 silc_buffer_push(servers, servers->data - servers->head);
3853 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3855 /* Send the packet */
3856 silc_server_packet_send(server, remote,
3857 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3858 servers->data, servers->len, TRUE);
3860 silc_buffer_free(servers);
3864 /* Returns assembled packet of all clients in the given ID list. The
3865 packet's form is dictated by the New ID Payload. */
3867 static void silc_server_announce_get_clients(SilcServer server,
3869 SilcBuffer *clients,
3871 unsigned long creation_time)
3873 SilcIDCacheList list;
3874 SilcIDCacheEntry id_cache;
3875 SilcClientEntry client;
3878 unsigned char mode[4];
3880 /* Go through all clients in the list */
3881 if (silc_idcache_get_all(id_list->clients, &list)) {
3882 if (silc_idcache_list_first(list, &id_cache)) {
3884 client = (SilcClientEntry)id_cache->context;
3886 if (creation_time && client->data.created < creation_time) {
3887 if (!silc_idcache_list_next(list, &id_cache))
3892 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3894 *clients = silc_buffer_realloc(*clients,
3896 (*clients)->truelen + idp->len :
3898 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3899 silc_buffer_put(*clients, idp->data, idp->len);
3900 silc_buffer_pull(*clients, idp->len);
3902 SILC_PUT32_MSB(client->mode, mode);
3904 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3905 2, idp->data, idp->len,
3907 *umodes = silc_buffer_realloc(*umodes,
3909 (*umodes)->truelen + tmp->len :
3911 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3912 silc_buffer_put(*umodes, tmp->data, tmp->len);
3913 silc_buffer_pull(*umodes, tmp->len);
3914 silc_buffer_free(tmp);
3916 silc_buffer_free(idp);
3918 if (!silc_idcache_list_next(list, &id_cache))
3923 silc_idcache_list_free(list);
3927 /* This function is used to announce our existing clients to our router
3928 when we've connected to it. If `creation_time' is non-zero then only
3929 the clients that has been created after the `creation_time' will be
3932 void silc_server_announce_clients(SilcServer server,
3933 unsigned long creation_time,
3934 SilcSocketConnection remote)
3936 SilcBuffer clients = NULL;
3937 SilcBuffer umodes = NULL;
3939 SILC_LOG_DEBUG(("Announcing clients"));
3941 /* Get clients in local list */
3942 silc_server_announce_get_clients(server, server->local_list,
3943 &clients, &umodes, creation_time);
3945 /* As router we announce our global list as well */
3946 if (server->server_type == SILC_ROUTER)
3947 silc_server_announce_get_clients(server, server->global_list,
3948 &clients, &umodes, creation_time);
3951 silc_buffer_push(clients, clients->data - clients->head);
3952 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3954 /* Send the packet */
3955 silc_server_packet_send(server, remote,
3956 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3957 clients->data, clients->len, TRUE);
3959 silc_buffer_free(clients);
3963 silc_buffer_push(umodes, umodes->data - umodes->head);
3964 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3966 /* Send the packet */
3967 silc_server_packet_send(server, remote,
3968 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3969 umodes->data, umodes->len, TRUE);
3971 silc_buffer_free(umodes);
3975 /* Returns channel's topic for announcing it */
3977 void silc_server_announce_get_channel_topic(SilcServer server,
3978 SilcChannelEntry channel,
3983 if (channel->topic) {
3984 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3985 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3986 chidp->data, chidp->len,
3988 strlen(channel->topic));
3989 silc_buffer_free(chidp);
3993 /* Returns assembled packets for channel users of the `channel'. */
3995 void silc_server_announce_get_channel_users(SilcServer server,
3996 SilcChannelEntry channel,
3997 SilcBuffer *channel_modes,
3998 SilcBuffer *channel_users,
3999 SilcBuffer *channel_users_modes)
4001 SilcChannelClientEntry chl;
4002 SilcHashTableList htl;
4003 SilcBuffer chidp, clidp, csidp;
4006 unsigned char mode[4], *fkey = NULL;
4007 SilcUInt32 fkey_len = 0;
4010 SILC_LOG_DEBUG(("Start"));
4012 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
4013 csidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
4016 SILC_PUT32_MSB(channel->mode, mode);
4017 hmac = channel->hmac ? (char *)silc_hmac_get_name(channel->hmac) : NULL;
4018 if (channel->founder_key)
4019 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4021 silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CMODE_CHANGE,
4022 6, csidp->data, csidp->len,
4025 hmac, hmac ? strlen(hmac) : 0,
4026 channel->passphrase,
4027 channel->passphrase ?
4028 strlen(channel->passphrase) : 0,
4032 silc_buffer_realloc(*channel_modes,
4034 (*channel_modes)->truelen + len : len));
4035 silc_buffer_pull_tail(*channel_modes,
4036 ((*channel_modes)->end -
4037 (*channel_modes)->data));
4038 silc_buffer_put(*channel_modes, tmp->data, tmp->len);
4039 silc_buffer_pull(*channel_modes, len);
4040 silc_buffer_free(tmp);
4045 /* Now find all users on the channel */
4046 silc_hash_table_list(channel->user_list, &htl);
4047 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4048 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4051 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
4052 clidp->data, clidp->len,
4053 chidp->data, chidp->len);
4056 silc_buffer_realloc(*channel_users,
4058 (*channel_users)->truelen + len : len));
4059 silc_buffer_pull_tail(*channel_users,
4060 ((*channel_users)->end -
4061 (*channel_users)->data));
4063 silc_buffer_put(*channel_users, tmp->data, tmp->len);
4064 silc_buffer_pull(*channel_users, len);
4065 silc_buffer_free(tmp);
4067 /* CUMODE notify for mode change on the channel */
4068 SILC_PUT32_MSB(chl->mode, mode);
4069 if (chl->mode & SILC_CHANNEL_UMODE_CHANFO && channel->founder_key)
4070 fkey = silc_pkcs_public_key_encode(channel->founder_key, &fkey_len);
4071 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
4072 4, csidp->data, csidp->len,
4074 clidp->data, clidp->len,
4077 *channel_users_modes =
4078 silc_buffer_realloc(*channel_users_modes,
4079 (*channel_users_modes ?
4080 (*channel_users_modes)->truelen + len : len));
4081 silc_buffer_pull_tail(*channel_users_modes,
4082 ((*channel_users_modes)->end -
4083 (*channel_users_modes)->data));
4085 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
4086 silc_buffer_pull(*channel_users_modes, len);
4087 silc_buffer_free(tmp);
4091 silc_buffer_free(clidp);
4093 silc_hash_table_list_reset(&htl);
4094 silc_buffer_free(chidp);
4095 silc_buffer_free(csidp);
4098 /* Returns assembled packets for all channels and users on those channels
4099 from the given ID List. The packets are in the form dictated by the
4100 New Channel and New Channel User payloads. */
4102 void silc_server_announce_get_channels(SilcServer server,
4104 SilcBuffer *channels,
4105 SilcBuffer **channel_modes,
4106 SilcBuffer *channel_users,
4107 SilcBuffer **channel_users_modes,
4108 SilcUInt32 *channel_users_modes_c,
4109 SilcBuffer **channel_topics,
4110 SilcChannelID ***channel_ids,
4111 unsigned long creation_time)
4113 SilcIDCacheList list;
4114 SilcIDCacheEntry id_cache;
4115 SilcChannelEntry channel;
4118 SilcUInt16 name_len;
4120 int i = *channel_users_modes_c;
4123 SILC_LOG_DEBUG(("Start"));
4125 /* Go through all channels in the list */
4126 if (silc_idcache_get_all(id_list->channels, &list)) {
4127 if (silc_idcache_list_first(list, &id_cache)) {
4129 channel = (SilcChannelEntry)id_cache->context;
4131 if (creation_time && channel->created < creation_time)
4136 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4137 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4138 name_len = strlen(channel->channel_name);
4141 len = 4 + name_len + id_len + 4;
4143 silc_buffer_realloc(*channels,
4144 (*channels ? (*channels)->truelen +
4146 silc_buffer_pull_tail(*channels,
4147 ((*channels)->end - (*channels)->data));
4148 silc_buffer_format(*channels,
4149 SILC_STR_UI_SHORT(name_len),
4150 SILC_STR_UI_XNSTRING(channel->channel_name,
4152 SILC_STR_UI_SHORT(id_len),
4153 SILC_STR_UI_XNSTRING(cid, id_len),
4154 SILC_STR_UI_INT(channel->mode),
4156 silc_buffer_pull(*channels, len);
4159 /* Channel user modes */
4160 *channel_users_modes = silc_realloc(*channel_users_modes,
4161 sizeof(**channel_users_modes) *
4163 (*channel_users_modes)[i] = NULL;
4164 *channel_modes = silc_realloc(*channel_modes,
4165 sizeof(**channel_modes) * (i + 1));
4166 (*channel_modes)[i] = NULL;
4167 *channel_ids = silc_realloc(*channel_ids,
4168 sizeof(**channel_ids) * (i + 1));
4169 (*channel_ids)[i] = NULL;
4170 silc_server_announce_get_channel_users(server, channel,
4171 &(*channel_modes)[i],
4173 &(*channel_users_modes)[i]);
4174 (*channel_ids)[i] = channel->id;
4176 /* Channel's topic */
4177 *channel_topics = silc_realloc(*channel_topics,
4178 sizeof(**channel_topics) * (i + 1));
4179 (*channel_topics)[i] = NULL;
4180 silc_server_announce_get_channel_topic(server, channel,
4181 &(*channel_topics)[i]);
4182 (*channel_users_modes_c)++;
4185 if (!silc_idcache_list_next(list, &id_cache))
4190 silc_idcache_list_free(list);
4194 /* This function is used to announce our existing channels to our router
4195 when we've connected to it. This also announces the users on the
4196 channels to the router. If the `creation_time' is non-zero only the
4197 channels that was created after the `creation_time' are announced.
4198 Note that the channel users are still announced even if the `creation_time'
4201 void silc_server_announce_channels(SilcServer server,
4202 unsigned long creation_time,
4203 SilcSocketConnection remote)
4205 SilcBuffer channels = NULL, *channel_modes = NULL, channel_users = NULL;
4206 SilcBuffer *channel_users_modes = NULL;
4207 SilcBuffer *channel_topics = NULL;
4208 SilcUInt32 channel_users_modes_c = 0;
4209 SilcChannelID **channel_ids = NULL;
4211 SILC_LOG_DEBUG(("Announcing channels and channel users"));
4213 /* Get channels and channel users in local list */
4214 silc_server_announce_get_channels(server, server->local_list,
4215 &channels, &channel_modes,
4217 &channel_users_modes,
4218 &channel_users_modes_c,
4220 &channel_ids, creation_time);
4222 /* Get channels and channel users in global list */
4223 if (server->server_type != SILC_SERVER)
4224 silc_server_announce_get_channels(server, server->global_list,
4225 &channels, &channel_modes,
4227 &channel_users_modes,
4228 &channel_users_modes_c,
4230 &channel_ids, creation_time);
4233 silc_buffer_push(channels, channels->data - channels->head);
4234 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
4236 /* Send the packet */
4237 silc_server_packet_send(server, remote,
4238 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
4239 channels->data, channels->len,
4242 silc_buffer_free(channels);
4245 if (channel_users) {
4246 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
4247 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
4248 channel_users->len);
4250 /* Send the packet */
4251 silc_server_packet_send(server, remote,
4252 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4253 channel_users->data, channel_users->len,
4256 silc_buffer_free(channel_users);
4259 if (channel_modes) {
4262 for (i = 0; i < channel_users_modes_c; i++) {
4263 if (!channel_modes[i])
4265 silc_buffer_push(channel_modes[i],
4266 channel_modes[i]->data -
4267 channel_modes[i]->head);
4268 SILC_LOG_HEXDUMP(("channel modes"), channel_modes[i]->data,
4269 channel_modes[i]->len);
4270 silc_server_packet_send_dest(server, remote,
4271 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4272 channel_ids[i], SILC_ID_CHANNEL,
4273 channel_modes[i]->data,
4274 channel_modes[i]->len,
4276 silc_buffer_free(channel_modes[i]);
4278 silc_free(channel_modes);
4281 if (channel_users_modes) {
4284 for (i = 0; i < channel_users_modes_c; i++) {
4285 if (!channel_users_modes[i])
4287 silc_buffer_push(channel_users_modes[i],
4288 channel_users_modes[i]->data -
4289 channel_users_modes[i]->head);
4290 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
4291 channel_users_modes[i]->len);
4292 silc_server_packet_send_dest(server, remote,
4293 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4294 channel_ids[i], SILC_ID_CHANNEL,
4295 channel_users_modes[i]->data,
4296 channel_users_modes[i]->len,
4298 silc_buffer_free(channel_users_modes[i]);
4300 silc_free(channel_users_modes);
4303 if (channel_topics) {
4306 for (i = 0; i < channel_users_modes_c; i++) {
4307 if (!channel_topics[i])
4310 silc_buffer_push(channel_topics[i],
4311 channel_topics[i]->data -
4312 channel_topics[i]->head);
4313 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
4314 channel_topics[i]->len);
4315 silc_server_packet_send_dest(server, remote,
4316 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
4317 channel_ids[i], SILC_ID_CHANNEL,
4318 channel_topics[i]->data,
4319 channel_topics[i]->len,
4321 silc_buffer_free(channel_topics[i]);
4323 silc_free(channel_topics);
4326 silc_free(channel_ids);
4329 /* Failure timeout callback. If this is called then we will immediately
4330 process the received failure. We always process the failure with timeout
4331 since we do not want to blindly trust to received failure packets.
4332 This won't be called (the timeout is cancelled) if the failure was
4333 bogus (it is bogus if remote does not close the connection after sending
4336 SILC_TASK_CALLBACK(silc_server_failure_callback)
4338 SilcServerFailureContext f = (SilcServerFailureContext)context;
4340 if (f->sock->protocol) {
4341 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
4342 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
4348 /* Assembles user list and users mode list from the `channel'. */
4350 bool silc_server_get_users_on_channel(SilcServer server,
4351 SilcChannelEntry channel,
4352 SilcBuffer *user_list,
4353 SilcBuffer *mode_list,
4354 SilcUInt32 *user_count)
4356 SilcChannelClientEntry chl;
4357 SilcHashTableList htl;
4358 SilcBuffer client_id_list;
4359 SilcBuffer client_mode_list;
4361 SilcUInt32 list_count = 0, len = 0;
4363 if (!silc_hash_table_count(channel->user_list))
4366 silc_hash_table_list(channel->user_list, &htl);
4367 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
4368 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
4369 silc_hash_table_list_reset(&htl);
4371 client_id_list = silc_buffer_alloc(len);
4373 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
4374 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
4375 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
4377 silc_hash_table_list(channel->user_list, &htl);
4378 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4380 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
4381 silc_buffer_put(client_id_list, idp->data, idp->len);
4382 silc_buffer_pull(client_id_list, idp->len);
4383 silc_buffer_free(idp);
4385 /* Client's mode on channel */
4386 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
4387 silc_buffer_pull(client_mode_list, 4);
4391 silc_hash_table_list_reset(&htl);
4392 silc_buffer_push(client_id_list,
4393 client_id_list->data - client_id_list->head);
4394 silc_buffer_push(client_mode_list,
4395 client_mode_list->data - client_mode_list->head);
4397 *user_list = client_id_list;
4398 *mode_list = client_mode_list;
4399 *user_count = list_count;
4403 /* Saves users and their modes to the `channel'. */
4405 void silc_server_save_users_on_channel(SilcServer server,
4406 SilcSocketConnection sock,
4407 SilcChannelEntry channel,
4408 SilcClientID *noadd,
4409 SilcBuffer user_list,
4410 SilcBuffer mode_list,
4411 SilcUInt32 user_count)
4416 SilcClientID *client_id;
4417 SilcClientEntry client;
4418 SilcIDCacheEntry cache;
4419 SilcChannelClientEntry chl;
4422 SILC_LOG_DEBUG(("Start"));
4424 for (i = 0; i < user_count; i++) {
4426 SILC_GET16_MSB(idp_len, user_list->data + 2);
4428 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
4429 silc_buffer_pull(user_list, idp_len);
4434 SILC_GET32_MSB(mode, mode_list->data);
4435 silc_buffer_pull(mode_list, 4);
4437 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
4438 silc_free(client_id);
4444 /* Check if we have this client cached already. */
4445 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4446 server->server_type, &cache);
4448 client = silc_idlist_find_client_by_id(server->global_list,
4449 client_id, server->server_type,
4454 /* If router did not find such Client ID in its lists then this must
4455 be bogus client or some router in the net is buggy. */
4456 if (server->server_type == SILC_ROUTER) {
4457 silc_free(client_id);
4461 /* We don't have that client anywhere, add it. The client is added
4462 to global list since server didn't have it in the lists so it must be
4464 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
4465 silc_id_dup(client_id, SILC_ID_CLIENT),
4466 sock->user_data, NULL, 0);
4468 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
4469 silc_free(client_id);
4473 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
4475 /* Found, if it is from global list we'll assure that we won't
4476 expire it now that the entry is on channel. */
4481 silc_free(client_id);
4483 if (!silc_server_client_on_channel(client, channel, &chl)) {
4484 /* Client was not on the channel, add it. */
4485 chl = silc_calloc(1, sizeof(*chl));
4486 chl->client = client;
4488 chl->channel = channel;
4489 silc_hash_table_add(channel->user_list, chl->client, chl);
4490 silc_hash_table_add(client->channels, chl->channel, chl);
4491 channel->user_count++;
4499 /* Saves channels and channels user modes to the `client'. Removes
4500 the client from those channels that are not sent in the list but
4503 void silc_server_save_user_channels(SilcServer server,
4504 SilcSocketConnection sock,
4505 SilcClientEntry client,
4506 SilcBuffer channels,
4507 SilcBuffer channels_user_modes)
4510 SilcUInt32 *chumodes;
4511 SilcChannelPayload entry;
4512 SilcChannelEntry channel;
4513 SilcChannelID *channel_id;
4514 SilcChannelClientEntry chl;
4515 SilcHashTable ht = NULL;
4516 SilcHashTableList htl;
4520 if (!channels ||!channels_user_modes)
4523 ch = silc_channel_payload_parse_list(channels->data, channels->len);
4524 if (ch && silc_get_mode_list(channels_user_modes, silc_dlist_count(ch),
4526 ht = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL,
4527 NULL, NULL, NULL, TRUE);
4528 silc_dlist_start(ch);
4529 while ((entry = silc_dlist_get(ch)) != SILC_LIST_END) {
4530 /* Check if we have this channel, and add it if we don't have it.
4531 Also add the client on the channel unless it is there already. */
4532 channel_id = silc_channel_get_id_parse(entry);
4533 channel = silc_idlist_find_channel_by_id(server->local_list,
4536 channel = silc_idlist_find_channel_by_id(server->global_list,
4539 if (server->server_type != SILC_SERVER) {
4540 silc_free(channel_id);
4545 /* We don't have that channel anywhere, add it. */
4546 name = silc_channel_get_name(entry, NULL);
4547 channel = silc_idlist_add_channel(server->global_list, strdup(name), 0,
4548 channel_id, server->router,
4551 silc_free(channel_id);
4558 channel->mode = silc_channel_get_mode(entry);
4560 /* Add the client on the channel */
4561 if (!silc_server_client_on_channel(client, channel, &chl)) {
4562 chl = silc_calloc(1, sizeof(*chl));
4563 chl->client = client;
4564 chl->mode = chumodes[i++];
4565 chl->channel = channel;
4566 silc_hash_table_add(channel->user_list, chl->client, chl);
4567 silc_hash_table_add(client->channels, chl->channel, chl);
4568 channel->user_count++;
4571 chl->mode = chumodes[i++];
4574 silc_hash_table_add(ht, channel, channel);
4575 silc_free(channel_id);
4577 silc_channel_payload_list_free(ch);
4578 silc_free(chumodes);
4582 /* Go through the list again and remove client from channels that
4583 are no part of the list. */
4585 silc_hash_table_list(client->channels, &htl);
4586 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4587 if (!silc_hash_table_find(ht, chl->channel, NULL, NULL)) {
4588 silc_hash_table_del(chl->channel->user_list, chl->client);
4589 silc_hash_table_del(chl->client->channels, chl->channel);
4593 silc_hash_table_list_reset(&htl);
4594 silc_hash_table_free(ht);
4596 silc_hash_table_list(client->channels, &htl);
4597 while (silc_hash_table_get(&htl, NULL, (void **)&chl)) {
4598 silc_hash_table_del(chl->channel->user_list, chl->client);
4599 silc_hash_table_del(chl->client->channels, chl->channel);
4602 silc_hash_table_list_reset(&htl);
4606 /* Lookups route to the client indicated by the `id_data'. The connection
4607 object and internal data object is returned. Returns NULL if route
4608 could not be found to the client. If the `client_id' is specified then
4609 it is used and the `id_data' is ignored. */
4611 SilcSocketConnection
4612 silc_server_get_client_route(SilcServer server,
4613 unsigned char *id_data,
4615 SilcClientID *client_id,
4616 SilcIDListData *idata,
4617 SilcClientEntry *client_entry)
4620 SilcClientEntry client;
4622 SILC_LOG_DEBUG(("Start"));
4625 *client_entry = NULL;
4627 /* Decode destination Client ID */
4629 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
4631 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
4635 id = silc_id_dup(client_id, SILC_ID_CLIENT);
4638 /* If the destination belongs to our server we don't have to route
4639 the packet anywhere but to send it to the local destination. */
4640 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
4644 /* If we are router and the client has router then the client is in
4645 our cell but not directly connected to us. */
4646 if (server->server_type == SILC_ROUTER && client->router) {
4647 /* We are of course in this case the client's router thus the route
4648 to the client is the server who owns the client. So, we will send
4649 the packet to that server. */
4651 *idata = (SilcIDListData)client->router;
4652 return client->router->connection;
4655 /* Seems that client really is directly connected to us */
4657 *idata = (SilcIDListData)client;
4659 *client_entry = client;
4660 return client->connection;
4663 /* Destination belongs to someone not in this server. If we are normal
4664 server our action is to send the packet to our router. */
4665 if (server->server_type != SILC_ROUTER && !server->standalone) {
4668 *idata = (SilcIDListData)server->router;
4669 return SILC_PRIMARY_ROUTE(server);
4672 /* We are router and we will perform route lookup for the destination
4673 and send the packet to fastest route. */
4674 if (server->server_type == SILC_ROUTER && !server->standalone) {
4675 /* Check first that the ID is valid */
4676 client = silc_idlist_find_client_by_id(server->global_list, id,
4679 SilcSocketConnection dst_sock;
4681 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
4685 *idata = (SilcIDListData)dst_sock->user_data;
4694 /* Encodes and returns channel list of channels the `client' has joined.
4695 Secret channels are not put to the list. */
4697 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
4698 SilcClientEntry client,
4701 SilcBuffer *user_mode_list)
4703 SilcBuffer buffer = NULL;
4704 SilcChannelEntry channel;
4705 SilcChannelClientEntry chl;
4706 SilcHashTableList htl;
4709 SilcUInt16 name_len;
4713 *user_mode_list = NULL;
4715 silc_hash_table_list(client->channels, &htl);
4716 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
4717 channel = chl->channel;
4719 if (channel->mode & SILC_CHANNEL_MODE_SECRET && !get_secret)
4721 if (channel->mode & SILC_CHANNEL_MODE_PRIVATE && !get_private)
4724 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4725 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4726 name_len = strlen(channel->channel_name);
4728 len = 4 + name_len + id_len + 4;
4729 buffer = silc_buffer_realloc(buffer,
4730 (buffer ? buffer->truelen + len : len));
4731 silc_buffer_pull_tail(buffer, (buffer->end - buffer->data));
4732 silc_buffer_format(buffer,
4733 SILC_STR_UI_SHORT(name_len),
4734 SILC_STR_UI_XNSTRING(channel->channel_name,
4736 SILC_STR_UI_SHORT(id_len),
4737 SILC_STR_UI_XNSTRING(cid, id_len),
4738 SILC_STR_UI_INT(chl->channel->mode),
4740 silc_buffer_pull(buffer, len);
4743 if (user_mode_list) {
4744 *user_mode_list = silc_buffer_realloc(*user_mode_list,
4746 (*user_mode_list)->truelen + 4 :
4748 silc_buffer_pull_tail(*user_mode_list, ((*user_mode_list)->end -
4749 (*user_mode_list)->data));
4750 SILC_PUT32_MSB(chl->mode, (*user_mode_list)->data);
4751 silc_buffer_pull(*user_mode_list, 4);
4754 silc_hash_table_list_reset(&htl);
4757 silc_buffer_push(buffer, buffer->data - buffer->head);
4758 if (user_mode_list && *user_mode_list)
4759 silc_buffer_push(*user_mode_list, ((*user_mode_list)->data -
4760 (*user_mode_list)->head));
4765 /* Finds client entry by Client ID and if it is not found then resolves
4766 it using WHOIS command. */
4768 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4769 SilcClientID *client_id,
4770 bool always_resolve,
4773 SilcClientEntry client;
4778 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4781 client = silc_idlist_find_client_by_id(server->global_list,
4782 client_id, TRUE, NULL);
4783 if (!client && server->server_type == SILC_ROUTER)
4787 if (!client && server->standalone)
4790 if (!client || !client->nickname || !client->username ||
4792 SilcBuffer buffer, idp;
4795 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4796 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4797 client->resolve_cmd_ident = ++server->cmd_ident;
4800 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4801 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4802 server->cmd_ident, 1,
4803 4, idp->data, idp->len);
4804 silc_server_packet_send(server, client ? client->router->connection :
4805 SILC_PRIMARY_ROUTE(server),
4806 SILC_PACKET_COMMAND, 0,
4807 buffer->data, buffer->len, FALSE);
4808 silc_buffer_free(idp);
4809 silc_buffer_free(buffer);
4820 /* A timeout callback for the re-key. We will be the initiator of the
4823 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4825 SilcSocketConnection sock = (SilcSocketConnection)context;
4826 SilcIDListData idata = (SilcIDListData)sock->user_data;
4827 SilcServer server = (SilcServer)idata->rekey->context;
4828 SilcProtocol protocol;
4829 SilcServerRekeyInternalContext *proto_ctx;
4831 SILC_LOG_DEBUG(("Start"));
4833 /* Allocate internal protocol context. This is sent as context
4835 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4836 proto_ctx->server = (void *)server;
4837 proto_ctx->sock = sock;
4838 proto_ctx->responder = FALSE;
4839 proto_ctx->pfs = idata->rekey->pfs;
4841 /* Perform rekey protocol. Will call the final callback after the
4842 protocol is over. */
4843 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4844 &protocol, proto_ctx, silc_server_rekey_final);
4845 sock->protocol = protocol;
4847 /* Run the protocol */
4848 silc_protocol_execute(protocol, server->schedule, 0, 0);
4850 /* Re-register re-key timeout */
4851 silc_schedule_task_add(server->schedule, sock->sock,
4852 silc_server_rekey_callback,
4853 context, idata->rekey->timeout, 0,
4854 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4857 /* The final callback for the REKEY protocol. This will actually take the
4858 new key material into use. */
4860 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4862 SilcProtocol protocol = (SilcProtocol)context;
4863 SilcServerRekeyInternalContext *ctx =
4864 (SilcServerRekeyInternalContext *)protocol->context;
4865 SilcServer server = (SilcServer)ctx->server;
4866 SilcSocketConnection sock = ctx->sock;
4868 SILC_LOG_DEBUG(("Start"));
4870 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4871 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4872 /* Error occured during protocol */
4873 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4874 silc_protocol_cancel(protocol, server->schedule);
4875 silc_protocol_free(protocol);
4876 sock->protocol = NULL;
4878 silc_packet_context_free(ctx->packet);
4880 silc_ske_free(ctx->ske);
4885 /* Purge the outgoing data queue to assure that all rekey packets really
4886 go to the network before we quit the protocol. */
4887 silc_server_packet_queue_purge(server, sock);
4890 silc_protocol_free(protocol);
4891 sock->protocol = NULL;
4893 silc_packet_context_free(ctx->packet);
4895 silc_ske_free(ctx->ske);
4899 /* Task callback used to retrieve network statistical information from
4900 router server once in a while. */
4902 SILC_TASK_CALLBACK(silc_server_get_stats)
4904 SilcServer server = (SilcServer)context;
4905 SilcBuffer idp, packet;
4907 SILC_LOG_DEBUG(("Retrieving stats from router"));
4909 if (!server->standalone) {
4910 idp = silc_id_payload_encode(server->router->id, SILC_ID_SERVER);
4911 packet = silc_command_payload_encode_va(SILC_COMMAND_STATS,
4912 ++server->cmd_ident, 1,
4913 1, idp->data, idp->len);
4914 silc_server_packet_send(server, SILC_PRIMARY_ROUTE(server),
4915 SILC_PACKET_COMMAND, 0, packet->data,
4916 packet->len, FALSE);
4917 silc_buffer_free(packet);
4918 silc_buffer_free(idp);
4921 silc_schedule_task_add(server->schedule, 0, silc_server_get_stats,
4922 server, 120, 0, SILC_TASK_TIMEOUT,