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_connect_to_router_retry);
32 SILC_TASK_CALLBACK(silc_server_connect_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
35 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
38 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
39 SILC_TASK_CALLBACK(silc_server_packet_process);
40 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
41 SILC_TASK_CALLBACK(silc_server_close_connection_final);
42 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout);
43 SILC_TASK_CALLBACK(silc_server_timeout_remote);
44 SILC_TASK_CALLBACK(silc_server_channel_key_rekey);
45 SILC_TASK_CALLBACK(silc_server_failure_callback);
46 SILC_TASK_CALLBACK(silc_server_rekey_callback);
48 /* Allocates a new SILC server object. This has to be done before the server
49 can be used. After allocation one must call silc_server_init to initialize
50 the server. The new allocated server object is returned to the new_server
53 int silc_server_alloc(SilcServer *new_server)
57 SILC_LOG_DEBUG(("Allocating new server object"));
59 server = silc_calloc(1, sizeof(*server));
60 server->server_type = SILC_SERVER;
61 server->standalone = TRUE;
62 server->local_list = silc_calloc(1, sizeof(*server->local_list));
63 server->global_list = silc_calloc(1, sizeof(*server->global_list));
64 server->pending_commands = silc_dlist_init();
66 server->sim = silc_dlist_init();
74 /* Free's the SILC server object. This is called at the very end before
77 void silc_server_free(SilcServer server)
83 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
84 silc_dlist_del(server->sim, sim);
87 silc_dlist_uninit(server->sim);
90 silc_server_config_unref(&server->config_ref);
92 silc_rng_free(server->rng);
94 silc_pkcs_free(server->pkcs);
95 if (server->public_key)
96 silc_pkcs_public_key_free(server->public_key);
97 if (server->private_key)
98 silc_pkcs_private_key_free(server->private_key);
99 if (server->pending_commands)
100 silc_dlist_uninit(server->pending_commands);
101 if (server->id_entry)
102 silc_idlist_del_server(server->local_list, server->id_entry);
104 silc_idcache_free(server->local_list->clients);
105 silc_idcache_free(server->local_list->servers);
106 silc_idcache_free(server->local_list->channels);
107 silc_idcache_free(server->global_list->clients);
108 silc_idcache_free(server->global_list->servers);
109 silc_idcache_free(server->global_list->channels);
111 silc_free(server->sockets);
116 /* Opens a listening port.
117 XXX This function will become more general and will support multiple
120 static bool silc_server_listen(SilcServer server, int *sock)
123 *sock = silc_net_create_server(server->config->server_info->port,
124 server->config->server_info->server_ip);
126 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
127 server->config->server_info->server_ip,
128 server->config->server_info->port));
134 /* Initializes the entire SILC server. This is called always before running
135 the server. This is called only once at the initialization of the program.
136 This binds the server to its listenning port. After this function returns
137 one should call silc_server_run to start the server. This returns TRUE
138 when everything is ok to run the server. Configuration file must be
139 read and parsed before calling this. */
141 bool silc_server_init(SilcServer server)
145 SilcServerEntry id_entry;
146 SilcIDListPurge purge;
147 SilcSocketConnection newsocket = NULL;
149 SILC_LOG_DEBUG(("Initializing server"));
151 /* Take config object for us */
152 silc_server_config_ref(&server->config_ref, server->config,
155 /* Steal public and private key from the config object */
156 server->public_key = server->config->server_info->public_key;
157 server->private_key = server->config->server_info->private_key;
158 server->config->server_info->public_key = NULL;
159 server->config->server_info->private_key = NULL;
161 /* Register all configured ciphers, PKCS and hash functions. */
162 if (!silc_server_config_register_ciphers(server))
163 silc_cipher_register_default();
164 if (!silc_server_config_register_pkcs(server))
165 silc_pkcs_register_default();
166 if (!silc_server_config_register_hashfuncs(server))
167 silc_hash_register_default();
168 if (!silc_server_config_register_hmacs(server))
169 silc_hmac_register_default();
171 /* Initialize random number generator for the server. */
172 server->rng = silc_rng_alloc();
173 silc_rng_init(server->rng);
174 silc_rng_global_init(server->rng);
176 /* Initialize hash functions for server to use */
177 silc_hash_alloc("md5", &server->md5hash);
178 silc_hash_alloc("sha1", &server->sha1hash);
180 /* Allocate PKCS context for local public and private keys */
181 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
183 silc_pkcs_public_key_set(server->pkcs, server->public_key);
184 silc_pkcs_private_key_set(server->pkcs, server->private_key);
186 /* Initialize the scheduler */
187 server->schedule = silc_schedule_init(server->config->param.connections_max);
188 if (!server->schedule)
191 /* First, register log files configuration for error output */
192 silc_server_config_setlogfiles(server);
194 /* Initialize ID caches */
195 server->local_list->clients =
196 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
197 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
198 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
200 /* These are allocated for normal server as well as these hold some
201 global information that the server has fetched from its router. For
202 router these are used as they are supposed to be used on router. */
203 server->global_list->clients =
204 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
205 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
206 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
208 /* Create a listening server */
209 if (!silc_server_listen(server, &sock))
212 /* Set socket to non-blocking mode */
213 silc_net_set_socket_nonblock(sock);
216 /* Allocate the entire socket list that is used in server. Eventually
217 all connections will have entry in this table (it is a table of
218 pointers to the actual object that is allocated individually
220 server->sockets = silc_calloc(server->config->param.connections_max,
221 sizeof(*server->sockets));
222 if (!server->sockets)
225 /* Add ourselves also to the socket table. The entry allocated above
226 is sent as argument for fast referencing in the future. */
227 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
228 server->sockets[sock] = newsocket;
230 /* Perform name and address lookups to resolve the listenning address
232 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
234 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
236 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
237 newsocket->hostname ? newsocket->hostname :
238 newsocket->ip ? newsocket->ip : ""));
239 server->stat.conn_failures++;
242 if (!newsocket->hostname)
243 newsocket->hostname = strdup(newsocket->ip);
245 newsocket->port = silc_net_get_local_port(sock);
247 /* Create a Server ID for the server. */
248 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
253 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
254 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
255 server->id_type = SILC_ID_SERVER;
256 server->server_name = server->config->server_info->server_name;
257 server->config->server_info->server_name = NULL;
259 /* Add ourselves to the server list. We don't have a router yet
260 beacuse we haven't established a route yet. It will be done later.
261 For now, NULL is sent as router. This allocates new entry to
264 silc_idlist_add_server(server->local_list, strdup(server->server_name),
265 server->server_type, server->id, NULL, NULL);
267 SILC_LOG_ERROR(("Could not add ourselves to cache"));
270 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
272 /* Put the allocated socket pointer also to the entry allocated above
273 for fast back-referencing to the socket list. */
274 newsocket->user_data = (void *)id_entry;
275 id_entry->connection = (void *)newsocket;
276 server->id_entry = id_entry;
278 /* Register protocols */
279 silc_server_protocols_register();
281 /* Add the first task to the scheduler. This is task that is executed by
282 timeout. It expires as soon as the caller calls silc_server_run. This
283 task performs authentication protocol and key exchange with our
285 silc_schedule_task_add(server->schedule, sock,
286 silc_server_connect_to_router,
287 (void *)server, 0, 1,
289 SILC_TASK_PRI_NORMAL);
291 /* Add listener task to the scheduler. This task receives new connections
292 to the server. This task remains on the queue until the end of the
294 silc_schedule_task_add(server->schedule, sock,
295 silc_server_accept_new_connection,
296 (void *)server, 0, 0,
298 SILC_TASK_PRI_NORMAL);
299 server->listenning = TRUE;
301 /* If server connections has been configured then we must be router as
302 normal server cannot have server connections, only router connections. */
303 if (server->config->servers) {
304 SilcServerConfigServer *ptr = server->config->servers;
306 server->server_type = SILC_ROUTER;
308 if (ptr->backup_router) {
309 server->server_type = SILC_BACKUP_ROUTER;
310 server->backup_router = TRUE;
311 server->id_entry->server_type = SILC_BACKUP_ROUTER;
318 /* Register the ID Cache purge task. This periodically purges the ID cache
319 and removes the expired cache entries. */
321 /* Clients local list */
322 purge = silc_calloc(1, sizeof(*purge));
323 purge->cache = server->local_list->clients;
324 purge->schedule = server->schedule;
325 purge->timeout = 600;
326 silc_schedule_task_add(purge->schedule, 0,
328 (void *)purge, purge->timeout, 0,
329 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
331 /* Clients global list */
332 purge = silc_calloc(1, sizeof(*purge));
333 purge->cache = server->global_list->clients;
334 purge->schedule = server->schedule;
335 purge->timeout = 300;
336 silc_schedule_task_add(purge->schedule, 0,
338 (void *)purge, purge->timeout, 0,
339 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
341 SILC_LOG_DEBUG(("Server initialized"));
343 /* We are done here, return succesfully */
347 silc_net_close_server(sock);
351 /* This function basically reads the config file again and switches the config
352 object pointed by the server object. After that, we have to fix various
353 things such as the server_name and the listening ports.
354 Keep in mind that we no longer have the root privileges at this point. */
356 bool silc_server_rehash(SilcServer server)
358 SilcServerConfig newconfig;
360 SILC_LOG_INFO(("Rehashing server"));
362 /* Our old config is gone now. We'll unreference our reference made in
363 silc_server_init and then destroy it since we are destroying it
364 underneath the application (layer which called silc_server_init). */
365 silc_server_config_unref(&server->config_ref);
366 silc_server_config_destroy(server->config);
368 /* Reset the logging system */
369 silc_log_quick = TRUE;
370 silc_log_flush_all();
372 /* Start the main rehash phase (read again the config file) */
373 newconfig = silc_server_config_alloc(server->config_file);
375 SILC_LOG_ERROR(("Rehash FAILED."));
379 /* Take new config context */
380 server->config = newconfig;
381 silc_server_config_ref(&server->config_ref, server->config, server->config);
383 /* Fix the server_name field */
384 if (!strcmp(server->server_name, newconfig->server_info->server_name)) {
385 /* We don't need any update */
386 silc_free(newconfig->server_info->server_name);
387 newconfig->server_info->server_name = NULL;
389 silc_free(server->server_name);
390 server->server_name = newconfig->server_info->server_name;
391 newconfig->server_info->server_name = NULL;
393 /* Update the idcache list with a fresh pointer */
394 silc_free(server->id_entry->server_name);
395 server->id_entry->server_name = strdup(server->server_name);
396 silc_idcache_del_by_context(server->local_list->servers, server->id_entry);
397 silc_idcache_add(server->local_list->servers,
398 server->id_entry->server_name,
399 server->id_entry->id, server->id_entry, 0, NULL);
402 silc_server_config_setlogfiles(server);
404 /* Change new key pair if necessary */
405 if (newconfig->server_info->public_key &&
406 !silc_pkcs_public_key_compare(server->public_key,
407 newconfig->server_info->public_key)) {
408 silc_pkcs_public_key_free(server->public_key);
409 silc_pkcs_private_key_free(server->private_key);
410 server->public_key = server->config->server_info->public_key;
411 server->private_key = server->config->server_info->private_key;
412 server->config->server_info->public_key = NULL;
413 server->config->server_info->private_key = NULL;
415 /* Allocate PKCS context for local public and private keys */
416 silc_pkcs_free(server->pkcs);
417 if (!silc_pkcs_alloc(server->public_key->name, &server->pkcs))
419 silc_pkcs_public_key_set(server->pkcs, server->public_key);
420 silc_pkcs_private_key_set(server->pkcs, server->private_key);
426 /* The heart of the server. This runs the scheduler thus runs the server.
427 When this returns the server has been stopped and the program will
430 void silc_server_run(SilcServer server)
432 SILC_LOG_INFO(("SILC Server started"));
434 /* Start the scheduler, the heart of the SILC server. When this returns
435 the program will be terminated. */
436 silc_schedule(server->schedule);
439 /* Stops the SILC server. This function is used to shutdown the server.
440 This is usually called after the scheduler has returned. After stopping
441 the server one should call silc_server_free. */
443 void silc_server_stop(SilcServer server)
445 SILC_LOG_DEBUG(("Stopping server"));
447 if (server->schedule) {
448 silc_schedule_stop(server->schedule);
449 silc_schedule_uninit(server->schedule);
450 server->schedule = NULL;
453 silc_server_protocols_unregister();
455 SILC_LOG_DEBUG(("Server stopped"));
458 /* Function that is called when the network connection to a router has
459 been established. This will continue with the key exchange protocol
460 with the remote router. */
462 void silc_server_start_key_exchange(SilcServer server,
463 SilcServerConnection sconn,
466 SilcSocketConnection newsocket;
467 SilcProtocol protocol;
468 SilcServerKEInternalContext *proto_ctx;
469 SilcServerConfigRouter *conn =
470 (SilcServerConfigRouter *) sconn->conn.ref_ptr;
473 /* Cancel any possible retry timeouts */
474 silc_schedule_task_del_by_callback(server->schedule,
475 silc_server_connect_router);
477 /* Set socket options */
478 silc_net_set_socket_nonblock(sock);
479 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
481 /* Create socket connection for the connection. Even though we
482 know that we are connecting to a router we will mark the socket
483 to be unknown connection until we have executed authentication
485 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
486 server->sockets[sock] = newsocket;
487 newsocket->hostname = strdup(sconn->remote_host);
488 newsocket->ip = strdup(sconn->remote_host);
489 newsocket->port = sconn->remote_port;
490 sconn->sock = newsocket;
492 /* Allocate internal protocol context. This is sent as context
494 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
495 proto_ctx->server = (void *)server;
496 proto_ctx->context = (void *)sconn;
497 proto_ctx->sock = newsocket;
498 proto_ctx->rng = server->rng;
499 proto_ctx->responder = FALSE;
501 /* Set Key Exchange flags from configuration, but fall back to global
503 SILC_GET_SKE_FLAGS(conn, proto_ctx);
504 if (server->config->param.key_exchange_pfs)
505 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
507 /* Perform key exchange protocol. silc_server_connect_to_router_second
508 will be called after the protocol is finished. */
509 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
510 &protocol, proto_ctx,
511 silc_server_connect_to_router_second);
512 newsocket->protocol = protocol;
514 /* Register a timeout task that will be executed if the protocol
515 is not executed within set limit. */
516 proto_ctx->timeout_task =
517 silc_schedule_task_add(server->schedule, sock,
518 silc_server_timeout_remote,
519 server, server->config->key_exchange_timeout, 0,
523 /* Register the connection for network input and output. This sets
524 that scheduler will listen for incoming packets for this connection
525 and sets that outgoing packets may be sent to this connection as
526 well. However, this doesn't set the scheduler for outgoing traffic,
527 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
528 later when outgoing data is available. */
529 context = (void *)server;
530 SILC_REGISTER_CONNECTION_FOR_IO(sock);
532 /* Run the protocol */
533 silc_protocol_execute(protocol, server->schedule, 0, 0);
536 /* Timeout callback that will be called to retry connecting to remote
537 router. This is used by both normal and router server. This will wait
538 before retrying the connecting. The timeout is generated by exponential
539 backoff algorithm. */
541 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
543 SilcServerConnection sconn = (SilcServerConnection)context;
544 SilcServer server = sconn->server;
545 SilcServerConfigRouter *conn = sconn->conn.ref_ptr;
546 SilcServerConfigConnParams *param =
547 (conn->param ? conn->param : &server->config->param);
549 SILC_LOG_INFO(("Retrying connecting to a router"));
551 /* Calculate next timeout */
552 if (sconn->retry_count >= 1) {
553 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
554 if (sconn->retry_timeout > param->reconnect_interval_max)
555 sconn->retry_timeout = param->reconnect_interval_max;
557 sconn->retry_timeout = param->reconnect_interval;
559 sconn->retry_count++;
560 sconn->retry_timeout = sconn->retry_timeout +
561 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
563 /* If we've reached max retry count, give up. */
564 if ((sconn->retry_count > param->reconnect_count) &&
565 !param->reconnect_keep_trying) {
566 SILC_LOG_ERROR(("Could not connect to router, giving up"));
567 silc_server_config_unref(&sconn->conn);
568 silc_free(sconn->remote_host);
569 silc_free(sconn->backup_replace_ip);
574 /* We will lookup a fresh pointer later */
575 silc_server_config_unref(&sconn->conn);
577 /* Wait one before retrying */
578 silc_schedule_task_add(server->schedule, 0, silc_server_connect_router,
579 context, sconn->retry_timeout, 0,
580 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
583 /* Generic routine to use connect to a router. */
585 SILC_TASK_CALLBACK(silc_server_connect_router)
587 SilcServerConnection sconn = (SilcServerConnection)context;
588 SilcServer server = sconn->server;
589 SilcServerConfigRouter *rconn;
592 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
593 (sconn->backup ? "backup router" : "router"),
594 sconn->remote_host, sconn->remote_port));
596 server->router_connect = time(NULL);
597 rconn = silc_server_config_find_router_conn(server, sconn->remote_host,
600 SILC_LOG_INFO(("Unconfigured %s connection %s:%d, cannot connect",
601 (sconn->backup ? "backup router" : "router"),
602 sconn->remote_host, sconn->remote_port));
603 silc_free(sconn->remote_host);
604 silc_free(sconn->backup_replace_ip);
608 silc_server_config_ref(&sconn->conn, server->config, (void *)rconn);
610 /* Connect to remote host */
611 sock = silc_net_create_connection(server->config->server_info->server_ip,
615 SILC_LOG_ERROR(("Could not connect to router %s:%d",
616 sconn->remote_host, sconn->remote_port));
617 if (!sconn->no_reconnect)
618 silc_schedule_task_add(server->schedule, 0,
619 silc_server_connect_to_router_retry,
620 context, 0, 1, SILC_TASK_TIMEOUT,
621 SILC_TASK_PRI_NORMAL);
623 silc_server_config_unref(&sconn->conn);
627 /* Continue with key exchange protocol */
628 silc_server_start_key_exchange(server, sconn, sock);
631 /* This function connects to our primary router or if we are a router this
632 establishes all our primary routes. This is called at the start of the
633 server to do authentication and key exchange with our router - called
636 SILC_TASK_CALLBACK(silc_server_connect_to_router)
638 SilcServer server = (SilcServer)context;
639 SilcServerConnection sconn;
640 SilcServerConfigRouter *ptr;
642 SILC_LOG_DEBUG(("Connecting to router(s)"));
644 if (server->server_type == SILC_SERVER) {
645 SILC_LOG_DEBUG(("We are normal server"));
646 } else if (server->server_type == SILC_ROUTER) {
647 SILC_LOG_DEBUG(("We are router"));
649 SILC_LOG_DEBUG(("We are backup router/normal server"));
652 if (!server->config->routers) {
653 /* There wasn't a configured router, we will continue but we don't
654 have a connection to outside world. We will be standalone server. */
655 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
656 server->standalone = TRUE;
660 /* Create the connections to all our routes */
661 for (ptr = server->config->routers; ptr; ptr = ptr->next) {
663 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
664 ptr->backup_router ? "Backup router" : "Router",
665 ptr->initiator ? "Initiator" : "Responder",
666 ptr->host, ptr->port));
668 if (ptr->initiator) {
669 /* Allocate connection object for hold connection specific stuff. */
670 sconn = silc_calloc(1, sizeof(*sconn));
671 sconn->server = server;
672 sconn->remote_host = strdup(ptr->host);
673 sconn->remote_port = ptr->port;
674 sconn->backup = ptr->backup_router;
676 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
677 sconn->backup_replace_port = ptr->backup_replace_port;
680 if (!server->router_conn && !sconn->backup)
681 server->router_conn = sconn;
683 silc_schedule_task_add(server->schedule, fd,
684 silc_server_connect_router,
685 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
686 SILC_TASK_PRI_NORMAL);
691 /* Second part of connecting to router(s). Key exchange protocol has been
692 executed and now we will execute authentication protocol. */
694 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
696 SilcProtocol protocol = (SilcProtocol)context;
697 SilcServerKEInternalContext *ctx =
698 (SilcServerKEInternalContext *)protocol->context;
699 SilcServer server = (SilcServer)ctx->server;
700 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
701 SilcSocketConnection sock = ctx->sock;
702 SilcServerConnAuthInternalContext *proto_ctx;
703 SilcServerConfigRouter *conn = NULL;
705 SILC_LOG_DEBUG(("Start"));
707 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
708 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
709 /* Error occured during protocol */
710 silc_protocol_free(protocol);
711 sock->protocol = NULL;
712 silc_ske_free_key_material(ctx->keymat);
714 silc_packet_context_free(ctx->packet);
716 silc_ske_free(ctx->ske);
717 silc_free(ctx->dest_id);
719 silc_server_config_unref(&sconn->conn);
720 silc_free(sconn->remote_host);
721 silc_free(sconn->backup_replace_ip);
723 silc_schedule_task_del_by_callback(server->schedule,
724 silc_server_failure_callback);
725 silc_server_disconnect_remote(server, sock, "Server closed connection: "
726 "Key exchange failed");
730 /* We now have the key material as the result of the key exchange
731 protocol. Take the key material into use. Free the raw key material
732 as soon as we've set them into use. */
733 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
734 ctx->sock, ctx->keymat,
735 ctx->ske->prop->cipher,
736 ctx->ske->prop->pkcs,
737 ctx->ske->prop->hash,
738 ctx->ske->prop->hmac,
739 ctx->ske->prop->group,
741 silc_protocol_free(protocol);
742 sock->protocol = NULL;
743 silc_ske_free_key_material(ctx->keymat);
745 silc_packet_context_free(ctx->packet);
747 silc_ske_free(ctx->ske);
748 silc_free(ctx->dest_id);
750 silc_server_config_unref(&sconn->conn);
751 silc_free(sconn->remote_host);
752 silc_free(sconn->backup_replace_ip);
754 silc_schedule_task_del_by_callback(server->schedule,
755 silc_server_failure_callback);
756 silc_server_disconnect_remote(server, sock, "Server closed connection: "
757 "Key exchange failed");
760 silc_ske_free_key_material(ctx->keymat);
762 /* Allocate internal context for the authentication protocol. This
763 is sent as context for the protocol. */
764 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
765 proto_ctx->server = (void *)server;
766 proto_ctx->context = (void *)sconn;
767 proto_ctx->sock = sock;
768 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
769 proto_ctx->dest_id_type = ctx->dest_id_type;
770 proto_ctx->dest_id = ctx->dest_id;
772 /* Resolve the authentication method used in this connection. Check if
773 we find a match from user configured connections */
774 if (!sconn->conn.ref_ptr)
775 conn = silc_server_config_find_router_conn(server, sock->hostname,
778 conn = sconn->conn.ref_ptr;
781 /* Match found. Use the configured authentication method. Take only
782 the passphrase, since for public key auth we automatically use
783 our local key pair. */
784 if (conn->passphrase) {
785 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
786 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
788 proto_ctx->auth_data = strdup(conn->passphrase);
789 proto_ctx->auth_data_len = strlen(conn->passphrase);
790 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
792 } else if (conn->publickeys) {
793 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
795 proto_ctx->auth_meth = SILC_AUTH_NONE;
798 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
799 sock->hostname, sock->ip, sock->port));
800 silc_protocol_free(protocol);
801 sock->protocol = NULL;
803 silc_packet_context_free(ctx->packet);
805 silc_ske_free(ctx->ske);
806 silc_free(ctx->dest_id);
808 silc_server_config_unref(&sconn->conn);
809 silc_free(sconn->remote_host);
810 silc_free(sconn->backup_replace_ip);
812 silc_schedule_task_del_by_callback(server->schedule,
813 silc_server_failure_callback);
814 silc_server_disconnect_remote(server, sock, "Server closed connection: "
815 "Key exchange failed");
819 /* Free old protocol as it is finished now */
820 silc_protocol_free(protocol);
822 silc_packet_context_free(ctx->packet);
824 sock->protocol = NULL;
826 /* Allocate the authentication protocol. This is allocated here
827 but we won't start it yet. We will be receiving party of this
828 protocol thus we will wait that connecting party will make
830 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
831 &sock->protocol, proto_ctx,
832 silc_server_connect_to_router_final);
834 /* Register timeout task. If the protocol is not executed inside
835 this timelimit the connection will be terminated. */
836 proto_ctx->timeout_task =
837 silc_schedule_task_add(server->schedule, sock->sock,
838 silc_server_timeout_remote,
840 server->config->conn_auth_timeout, 0,
844 /* Run the protocol */
845 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
848 /* Finalizes the connection to router. Registers a server task to the
849 queue so that we can accept new connections. */
851 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
853 SilcProtocol protocol = (SilcProtocol)context;
854 SilcServerConnAuthInternalContext *ctx =
855 (SilcServerConnAuthInternalContext *)protocol->context;
856 SilcServer server = (SilcServer)ctx->server;
857 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
858 SilcSocketConnection sock = ctx->sock;
859 SilcServerEntry id_entry;
861 SilcServerHBContext hb_context;
862 unsigned char *id_string;
864 SilcIDListData idata;
865 SilcServerConfigRouter *conn = NULL;
866 SilcServerConfigConnParams *param = NULL;
868 SILC_LOG_DEBUG(("Start"));
870 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
871 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
872 /* Error occured during protocol */
873 silc_free(ctx->dest_id);
874 silc_server_disconnect_remote(server, sock, "Server closed connection: "
875 "Authentication failed");
879 /* Add a task to the queue. This task receives new connections to the
880 server. This task remains on the queue until the end of the program. */
881 if (!server->listenning && !sconn->backup) {
882 silc_schedule_task_add(server->schedule, server->sock,
883 silc_server_accept_new_connection,
884 (void *)server, 0, 0,
886 SILC_TASK_PRI_NORMAL);
887 server->listenning = TRUE;
890 /* Send NEW_SERVER packet to the router. We will become registered
891 to the SILC network after sending this packet. */
892 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
893 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
894 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
895 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
896 silc_buffer_format(packet,
897 SILC_STR_UI_SHORT(id_len),
898 SILC_STR_UI_XNSTRING(id_string, id_len),
899 SILC_STR_UI_SHORT(strlen(server->server_name)),
900 SILC_STR_UI_XNSTRING(server->server_name,
901 strlen(server->server_name)),
904 /* Send the packet */
905 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
906 packet->data, packet->len, TRUE);
907 silc_buffer_free(packet);
908 silc_free(id_string);
910 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
912 /* Check that we do not have this ID already */
913 id_entry = silc_idlist_find_server_by_id(server->local_list,
914 ctx->dest_id, TRUE, NULL);
916 silc_idcache_del_by_context(server->local_list->servers, id_entry);
918 id_entry = silc_idlist_find_server_by_id(server->global_list,
919 ctx->dest_id, TRUE, NULL);
921 silc_idcache_del_by_context(server->global_list->servers, id_entry);
924 SILC_LOG_DEBUG(("New server id(%s)",
925 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
927 /* Add the connected router to global server list */
928 id_entry = silc_idlist_add_server(server->global_list,
929 strdup(sock->hostname),
930 SILC_ROUTER, ctx->dest_id, NULL, sock);
932 silc_free(ctx->dest_id);
933 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
934 silc_server_disconnect_remote(server, sock, "Server closed connection: "
935 "Authentication failed");
939 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
940 silc_free(sock->user_data);
941 sock->user_data = (void *)id_entry;
942 sock->type = SILC_SOCKET_TYPE_ROUTER;
943 idata = (SilcIDListData)sock->user_data;
944 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
946 conn = sconn->conn.ref_ptr;
947 param = &server->config->param;
948 if (conn && conn->param)
951 /* Perform keepalive. The `hb_context' will be freed automatically
952 when finally calling the silc_socket_free function. */
953 hb_context = silc_calloc(1, sizeof(*hb_context));
954 hb_context->server = server;
955 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
956 silc_server_perform_heartbeat,
959 /* Register re-key timeout */
960 idata->rekey->timeout = param->key_exchange_rekey;
961 idata->rekey->context = (void *)server;
962 silc_schedule_task_add(server->schedule, sock->sock,
963 silc_server_rekey_callback,
964 (void *)sock, idata->rekey->timeout, 0,
965 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
967 if (!sconn->backup) {
968 /* Mark this router our primary router if we're still standalone */
969 if (server->standalone) {
970 server->id_entry->router = id_entry;
971 server->router = id_entry;
972 server->standalone = FALSE;
974 /* If we are router then announce our possible servers. */
975 if (server->server_type == SILC_ROUTER)
976 silc_server_announce_servers(server, FALSE, 0,
977 server->router->connection);
979 /* Announce our clients and channels to the router */
980 silc_server_announce_clients(server, 0, server->router->connection);
981 silc_server_announce_channels(server, 0, server->router->connection);
984 /* Add this server to be our backup router */
985 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
986 sconn->backup_replace_port, FALSE);
989 sock->protocol = NULL;
991 /* Call the completion callback to indicate that we've connected to
994 (*sconn->callback)(server, id_entry, sconn->callback_context);
997 /* Free the temporary connection data context */
999 silc_server_config_unref(&sconn->conn);
1000 silc_free(sconn->remote_host);
1001 silc_free(sconn->backup_replace_ip);
1004 if (sconn == server->router_conn)
1005 server->router_conn = NULL;
1007 /* Free the protocol object */
1008 if (sock->protocol == protocol)
1009 sock->protocol = NULL;
1010 silc_protocol_free(protocol);
1012 silc_packet_context_free(ctx->packet);
1014 silc_ske_free(ctx->ske);
1015 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
1016 silc_free(ctx->auth_data);
1020 /* Host lookup callback that is called after the incoming connection's
1021 IP and FQDN lookup is performed. This will actually check the acceptance
1022 of the incoming connection and will register the key exchange protocol
1023 for this connection. */
1026 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1029 SilcServer server = (SilcServer)context;
1030 SilcServerKEInternalContext *proto_ctx;
1031 SilcServerConfigClient *cconfig = NULL;
1032 SilcServerConfigServer *sconfig = NULL;
1033 SilcServerConfigRouter *rconfig = NULL;
1034 SilcServerConfigDeny *deny;
1037 SILC_LOG_DEBUG(("Start"));
1039 /* Check whether we could resolve both IP and FQDN. */
1040 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1041 server->config->require_reverse_lookup)) {
1042 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1043 sock->hostname ? sock->hostname :
1044 sock->ip ? sock->ip : ""));
1045 server->stat.conn_failures++;
1046 silc_server_disconnect_remote(server, sock,
1047 "Server closed connection: Unknown host");
1051 /* Register the connection for network input and output. This sets
1052 that scheduler will listen for incoming packets for this connection
1053 and sets that outgoing packets may be sent to this connection as well.
1054 However, this doesn't set the scheduler for outgoing traffic, it
1055 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1056 later when outgoing data is available. */
1057 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1059 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1062 port = server->sockets[server->sock]->port; /* Listenning port */
1064 /* Check whether this connection is denied to connect to us. */
1065 deny = silc_server_config_find_denied(server, sock->ip);
1067 deny = silc_server_config_find_denied(server, sock->hostname);
1069 /* The connection is denied */
1070 SILC_LOG_INFO(("Connection %s (%s) is denied",
1071 sock->hostname, sock->ip));
1072 silc_server_disconnect_remote(server, sock, deny->reason ?
1074 "Server closed connection: "
1075 "Connection refused");
1076 server->stat.conn_failures++;
1080 /* Check whether we have configured this sort of connection at all. We
1081 have to check all configurations since we don't know what type of
1082 connection this is. */
1083 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1084 cconfig = silc_server_config_find_client(server, sock->hostname);
1085 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1086 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1087 if (server->server_type == SILC_ROUTER) {
1088 if (!(rconfig = silc_server_config_find_router_conn(server,
1090 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1093 if (!cconfig && !sconfig && !rconfig) {
1094 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1096 silc_server_disconnect_remote(server, sock,
1097 "Server closed connection: "
1098 "Connection refused");
1099 server->stat.conn_failures++;
1103 /* The connection is allowed */
1105 /* Allocate internal context for key exchange protocol. This is
1106 sent as context for the protocol. */
1107 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1108 proto_ctx->server = context;
1109 proto_ctx->sock = sock;
1110 proto_ctx->rng = server->rng;
1111 proto_ctx->responder = TRUE;
1112 silc_server_config_ref(&proto_ctx->cconfig, server->config, cconfig);
1113 silc_server_config_ref(&proto_ctx->sconfig, server->config, sconfig);
1114 silc_server_config_ref(&proto_ctx->rconfig, server->config, rconfig);
1116 /* Take flags for key exchange. Since we do not know what type of connection
1117 this is, we go through all found configurations and use the global ones
1118 as well. This will result always into strictest key exchange flags. */
1119 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1120 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1121 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1122 if (server->config->param.key_exchange_pfs)
1123 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1125 /* Prepare the connection for key exchange protocol. We allocate the
1126 protocol but will not start it yet. The connector will be the
1127 initiator of the protocol thus we will wait for initiation from
1128 there before we start the protocol. */
1129 server->stat.auth_attempts++;
1130 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1131 &sock->protocol, proto_ctx,
1132 silc_server_accept_new_connection_second);
1134 /* Register a timeout task that will be executed if the connector
1135 will not start the key exchange protocol within specified timeout
1136 and the connection will be closed. */
1137 proto_ctx->timeout_task =
1138 silc_schedule_task_add(server->schedule, sock->sock,
1139 silc_server_timeout_remote,
1140 context, server->config->key_exchange_timeout, 0,
1145 /* Accepts new connections to the server. Accepting new connections are
1146 done in three parts to make it async. */
1148 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1150 SilcServer server = (SilcServer)context;
1151 SilcSocketConnection newsocket;
1154 SILC_LOG_DEBUG(("Accepting new connection"));
1156 server->stat.conn_attempts++;
1158 sock = silc_net_accept_connection(server->sock);
1160 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1161 server->stat.conn_failures++;
1165 /* Check for maximum allowed connections */
1166 if (sock > server->config->param.connections_max) {
1167 SILC_LOG_ERROR(("Refusing connection, server is full"));
1168 server->stat.conn_failures++;
1169 silc_net_close_connection(sock);
1173 /* Set socket options */
1174 silc_net_set_socket_nonblock(sock);
1175 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1177 /* We don't create a ID yet, since we don't know what type of connection
1178 this is yet. But, we do add the connection to the socket table. */
1179 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1180 server->sockets[sock] = newsocket;
1182 /* Perform asynchronous host lookup. This will lookup the IP and the
1183 FQDN of the remote connection. After the lookup is done the connection
1184 is accepted further. */
1185 silc_socket_host_lookup(newsocket, TRUE,
1186 silc_server_accept_new_connection_lookup, context,
1190 /* Second part of accepting new connection. Key exchange protocol has been
1191 performed and now it is time to do little connection authentication
1192 protocol to figure out whether this connection is client or server
1193 and whether it has right to access this server (especially server
1194 connections needs to be authenticated). */
1196 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1198 SilcProtocol protocol = (SilcProtocol)context;
1199 SilcServerKEInternalContext *ctx =
1200 (SilcServerKEInternalContext *)protocol->context;
1201 SilcServer server = (SilcServer)ctx->server;
1202 SilcSocketConnection sock = ctx->sock;
1203 SilcServerConnAuthInternalContext *proto_ctx;
1205 SILC_LOG_DEBUG(("Start"));
1207 if ((protocol->state == SILC_PROTOCOL_STATE_ERROR) ||
1208 (protocol->state == SILC_PROTOCOL_STATE_FAILURE)) {
1209 /* Error occured during protocol */
1210 silc_protocol_free(protocol);
1211 sock->protocol = NULL;
1212 silc_ske_free_key_material(ctx->keymat);
1214 silc_packet_context_free(ctx->packet);
1216 silc_ske_free(ctx->ske);
1217 silc_free(ctx->dest_id);
1218 silc_server_config_unref(&ctx->cconfig);
1219 silc_server_config_unref(&ctx->sconfig);
1220 silc_server_config_unref(&ctx->rconfig);
1222 silc_schedule_task_del_by_callback(server->schedule,
1223 silc_server_failure_callback);
1224 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1225 "Key exchange failed");
1226 server->stat.auth_failures++;
1230 /* We now have the key material as the result of the key exchange
1231 protocol. Take the key material into use. Free the raw key material
1232 as soon as we've set them into use. */
1233 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1234 ctx->sock, ctx->keymat,
1235 ctx->ske->prop->cipher,
1236 ctx->ske->prop->pkcs,
1237 ctx->ske->prop->hash,
1238 ctx->ske->prop->hmac,
1239 ctx->ske->prop->group,
1241 silc_protocol_free(protocol);
1242 sock->protocol = NULL;
1243 silc_ske_free_key_material(ctx->keymat);
1245 silc_packet_context_free(ctx->packet);
1247 silc_ske_free(ctx->ske);
1248 silc_free(ctx->dest_id);
1249 silc_server_config_unref(&ctx->cconfig);
1250 silc_server_config_unref(&ctx->sconfig);
1251 silc_server_config_unref(&ctx->rconfig);
1253 silc_schedule_task_del_by_callback(server->schedule,
1254 silc_server_failure_callback);
1255 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1256 "Key exchange failed");
1257 server->stat.auth_failures++;
1260 silc_ske_free_key_material(ctx->keymat);
1262 /* Allocate internal context for the authentication protocol. This
1263 is sent as context for the protocol. */
1264 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1265 proto_ctx->server = (void *)server;
1266 proto_ctx->sock = sock;
1267 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1268 proto_ctx->responder = TRUE;
1269 proto_ctx->dest_id_type = ctx->dest_id_type;
1270 proto_ctx->dest_id = ctx->dest_id;
1271 proto_ctx->cconfig = ctx->cconfig;
1272 proto_ctx->sconfig = ctx->sconfig;
1273 proto_ctx->rconfig = ctx->rconfig;
1275 /* Free old protocol as it is finished now */
1276 silc_protocol_free(protocol);
1278 silc_packet_context_free(ctx->packet);
1280 sock->protocol = NULL;
1282 /* Allocate the authentication protocol. This is allocated here
1283 but we won't start it yet. We will be receiving party of this
1284 protocol thus we will wait that connecting party will make
1285 their first move. */
1286 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1287 &sock->protocol, proto_ctx,
1288 silc_server_accept_new_connection_final);
1290 /* Register timeout task. If the protocol is not executed inside
1291 this timelimit the connection will be terminated. */
1292 proto_ctx->timeout_task =
1293 silc_schedule_task_add(server->schedule, sock->sock,
1294 silc_server_timeout_remote,
1296 server->config->conn_auth_timeout, 0,
1301 /* Final part of accepting new connection. The connection has now
1302 been authenticated and keys has been exchanged. We also know whether
1303 this is client or server connection. */
1305 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1307 SilcProtocol protocol = (SilcProtocol)context;
1308 SilcServerConnAuthInternalContext *ctx =
1309 (SilcServerConnAuthInternalContext *)protocol->context;
1310 SilcServer server = (SilcServer)ctx->server;
1311 SilcSocketConnection sock = ctx->sock;
1312 SilcServerHBContext hb_context;
1313 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1315 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1317 SILC_LOG_DEBUG(("Start"));
1319 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1320 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1321 /* Error occured during protocol */
1322 silc_protocol_free(protocol);
1323 sock->protocol = NULL;
1325 silc_packet_context_free(ctx->packet);
1327 silc_ske_free(ctx->ske);
1328 silc_free(ctx->dest_id);
1329 silc_server_config_unref(&ctx->cconfig);
1330 silc_server_config_unref(&ctx->sconfig);
1331 silc_server_config_unref(&ctx->rconfig);
1333 silc_schedule_task_del_by_callback(server->schedule,
1334 silc_server_failure_callback);
1335 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1336 "Authentication failed");
1337 server->stat.auth_failures++;
1341 entry->data.last_receive = time(NULL);
1343 switch (ctx->conn_type) {
1344 case SILC_SOCKET_TYPE_CLIENT:
1346 SilcClientEntry client;
1347 SilcServerConfigClient *conn = ctx->cconfig.ref_ptr;
1349 /* Verify whether this connection is after all allowed to connect */
1350 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1351 &server->config->param,
1352 conn->param, ctx->ske)) {
1353 server->stat.auth_failures++;
1357 SILC_LOG_DEBUG(("Remote host is client"));
1358 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1361 /* Add the client to the client ID cache. The nickname and Client ID
1362 and other information is created after we have received NEW_CLIENT
1363 packet from client. */
1364 client = silc_idlist_add_client(server->local_list,
1365 NULL, NULL, NULL, NULL, NULL, sock, 0);
1367 SILC_LOG_ERROR(("Could not add new client to cache"));
1368 silc_free(sock->user_data);
1369 silc_server_disconnect_remote(server, sock,
1370 "Server closed connection: "
1371 "Authentication failed");
1372 server->stat.auth_failures++;
1377 server->stat.my_clients++;
1378 server->stat.clients++;
1379 if (server->server_type == SILC_ROUTER)
1380 server->stat.cell_clients++;
1382 /* Get connection parameters */
1384 if (conn->param->keepalive_secs)
1385 hearbeat_timeout = conn->param->keepalive_secs;
1388 id_entry = (void *)client;
1391 case SILC_SOCKET_TYPE_SERVER:
1392 case SILC_SOCKET_TYPE_ROUTER:
1394 SilcServerEntry new_server;
1395 bool initiator = FALSE;
1396 bool backup_local = FALSE;
1397 bool backup_router = FALSE;
1398 char *backup_replace_ip = NULL;
1399 SilcUInt16 backup_replace_port = 0;
1400 SilcServerConfigServer *sconn = ctx->sconfig.ref_ptr;
1401 SilcServerConfigRouter *rconn = ctx->rconfig.ref_ptr;
1403 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1404 /* Verify whether this connection is after all allowed to connect */
1405 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1406 &server->config->param,
1407 rconn ? rconn->param : NULL,
1409 server->stat.auth_failures++;
1415 if (rconn->param->keepalive_secs)
1416 hearbeat_timeout = rconn->param->keepalive_secs;
1419 initiator = rconn->initiator;
1420 backup_local = rconn->backup_local;
1421 backup_router = rconn->backup_router;
1422 backup_replace_ip = rconn->backup_replace_ip;
1423 backup_replace_port = rconn->backup_replace_port;
1427 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1428 /* Verify whether this connection is after all allowed to connect */
1429 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1430 &server->config->param,
1431 sconn ? sconn->param : NULL,
1433 server->stat.auth_failures++;
1438 if (sconn->param->keepalive_secs)
1439 hearbeat_timeout = sconn->param->keepalive_secs;
1442 backup_router = sconn->backup_router;
1446 SILC_LOG_DEBUG(("Remote host is %s",
1447 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1448 "server" : (backup_router ?
1449 "backup router" : "router")));
1450 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1451 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1452 "server" : (backup_router ?
1453 "backup router" : "router")));
1455 /* Add the server into server cache. The server name and Server ID
1456 is updated after we have received NEW_SERVER packet from the
1457 server. We mark ourselves as router for this server if we really
1460 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1461 server->local_list : (backup_router ?
1462 server->local_list :
1463 server->global_list)),
1465 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1466 SILC_SERVER : SILC_ROUTER),
1468 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1469 server->id_entry : (backup_router ?
1470 server->id_entry : NULL)),
1473 SILC_LOG_ERROR(("Could not add new server to cache"));
1474 silc_free(sock->user_data);
1475 silc_server_disconnect_remote(server, sock,
1476 "Server closed connection: "
1477 "Authentication failed");
1478 server->stat.auth_failures++;
1483 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1484 server->stat.my_servers++;
1486 server->stat.my_routers++;
1487 server->stat.servers++;
1489 id_entry = (void *)new_server;
1491 /* If the incoming connection is router and marked as backup router
1492 then add it to be one of our backups */
1493 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1494 silc_server_backup_add(server, new_server, backup_replace_ip,
1495 backup_replace_port, backup_local);
1497 /* Change it back to SERVER type since that's what it really is. */
1499 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1501 new_server->server_type = SILC_BACKUP_ROUTER;
1504 /* Check whether this connection is to be our primary router connection
1505 if we do not already have the primary route. */
1506 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1507 if (silc_server_config_is_primary_route(server) && !initiator)
1510 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1511 server->standalone = FALSE;
1512 if (!server->id_entry->router) {
1513 server->id_entry->router = id_entry;
1514 server->router = id_entry;
1525 sock->type = ctx->conn_type;
1527 /* Add the common data structure to the ID entry. */
1528 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1530 /* Add to sockets internal pointer for fast referencing */
1531 silc_free(sock->user_data);
1532 sock->user_data = id_entry;
1534 /* Connection has been fully established now. Everything is ok. */
1535 SILC_LOG_DEBUG(("New connection authenticated"));
1537 /* Perform keepalive. The `hb_context' will be freed automatically
1538 when finally calling the silc_socket_free function. */
1539 hb_context = silc_calloc(1, sizeof(*hb_context));
1540 hb_context->server = server;
1541 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1542 silc_server_perform_heartbeat,
1546 silc_schedule_task_del_by_callback(server->schedule,
1547 silc_server_failure_callback);
1548 silc_protocol_free(protocol);
1550 silc_packet_context_free(ctx->packet);
1552 silc_ske_free(ctx->ske);
1553 silc_free(ctx->dest_id);
1554 silc_server_config_unref(&ctx->cconfig);
1555 silc_server_config_unref(&ctx->sconfig);
1556 silc_server_config_unref(&ctx->rconfig);
1558 sock->protocol = NULL;
1561 /* This function is used to read packets from network and send packets to
1562 network. This is usually a generic task. */
1564 SILC_TASK_CALLBACK(silc_server_packet_process)
1566 SilcServer server = (SilcServer)context;
1567 SilcSocketConnection sock = server->sockets[fd];
1568 SilcIDListData idata;
1569 SilcCipher cipher = NULL;
1570 SilcHmac hmac = NULL;
1571 SilcUInt32 sequence = 0;
1577 SILC_LOG_DEBUG(("Processing packet"));
1579 /* Packet sending */
1581 if (type == SILC_TASK_WRITE) {
1582 /* Do not send data to disconnected connection */
1583 if (SILC_IS_DISCONNECTED(sock))
1586 server->stat.packets_sent++;
1588 /* Send the packet */
1589 ret = silc_packet_send(sock, TRUE);
1591 /* If returned -2 could not write to connection now, will do
1597 SILC_LOG_ERROR(("Error sending packet to connection "
1598 "%s:%d [%s]", sock->hostname, sock->port,
1599 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1600 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1601 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1606 /* The packet has been sent and now it is time to set the connection
1607 back to only for input. When there is again some outgoing data
1608 available for this connection it will be set for output as well.
1609 This call clears the output setting and sets it only for input. */
1610 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1611 SILC_UNSET_OUTBUF_PENDING(sock);
1613 silc_buffer_clear(sock->outbuf);
1617 /* Packet receiving */
1619 /* Read some data from connection */
1620 ret = silc_packet_receive(sock);
1624 SILC_LOG_ERROR(("Error receiving packet from connection "
1625 "%s:%d [%s] %s", sock->hostname, sock->port,
1626 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1627 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1628 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1629 "Router"), strerror(errno)));
1635 SILC_LOG_DEBUG(("Read EOF"));
1637 /* If connection is disconnecting already we will finally
1638 close the connection */
1639 if (SILC_IS_DISCONNECTING(sock)) {
1640 if (sock->user_data)
1641 silc_server_free_sock_user_data(server, sock, NULL);
1642 silc_server_close_connection(server, sock);
1646 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1647 SILC_SET_DISCONNECTING(sock);
1649 if (sock->user_data) {
1651 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1652 silc_server_free_sock_user_data(server, sock, tmp);
1654 silc_server_free_sock_user_data(server, sock, NULL);
1655 } else if (server->router_conn && server->router_conn->sock == sock &&
1656 !server->router && server->standalone)
1657 silc_schedule_task_add(server->schedule, 0,
1658 silc_server_connect_to_router,
1661 SILC_TASK_PRI_NORMAL);
1663 silc_server_close_connection(server, sock);
1667 /* If connection is disconnecting or disconnected we will ignore
1669 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1670 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1674 server->stat.packets_received++;
1676 /* Get keys and stuff from ID entry */
1677 idata = (SilcIDListData)sock->user_data;
1679 cipher = idata->receive_key;
1680 hmac = idata->hmac_receive;
1681 sequence = idata->psn_receive;
1684 /* Process the packet. This will call the parser that will then
1685 decrypt and parse the packet. */
1686 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1687 TRUE : FALSE, cipher, hmac, sequence,
1688 silc_server_packet_parse, server);
1690 /* If this socket connection is not authenticated yet and the packet
1691 processing failed we will drop the connection since it can be
1692 a malicious flooder. */
1693 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1694 (!sock->protocol || sock->protocol->protocol->type ==
1695 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1696 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1697 SILC_SET_DISCONNECTING(sock);
1699 if (sock->user_data)
1700 silc_server_free_sock_user_data(server, sock, NULL);
1701 silc_server_close_connection(server, sock);
1705 /* Parses whole packet, received earlier. */
1707 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1709 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1710 SilcServer server = (SilcServer)parse_ctx->context;
1711 SilcSocketConnection sock = parse_ctx->sock;
1712 SilcPacketContext *packet = parse_ctx->packet;
1713 SilcIDListData idata = (SilcIDListData)sock->user_data;
1716 SILC_LOG_DEBUG(("Start"));
1718 /* Parse the packet */
1719 if (parse_ctx->normal)
1720 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1722 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1724 /* If entry is disabled ignore what we got. */
1725 if (ret != SILC_PACKET_RESUME_ROUTER &&
1726 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1727 SILC_LOG_DEBUG(("Connection is disabled"));
1731 if (ret == SILC_PACKET_NONE)
1734 /* Check that the the current client ID is same as in the client's packet. */
1735 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1736 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1737 if (client && client->id) {
1738 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1739 packet->src_id_type);
1740 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1748 if (server->server_type == SILC_ROUTER) {
1749 /* Route the packet if it is not destined to us. Other ID types but
1750 server are handled separately after processing them. */
1751 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1752 packet->dst_id_type == SILC_ID_SERVER &&
1753 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1754 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1756 /* Route the packet to fastest route for the destination ID */
1757 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1758 packet->dst_id_type);
1761 silc_server_packet_route(server,
1762 silc_server_route_get(server, id,
1763 packet->dst_id_type),
1770 /* Parse the incoming packet type */
1771 silc_server_packet_parse_type(server, sock, packet);
1773 if (server->server_type == SILC_ROUTER) {
1774 /* Broadcast packet if it is marked as broadcast packet and it is
1775 originated from router and we are router. */
1776 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1777 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1778 !server->standalone) {
1779 /* Broadcast to our primary route */
1780 silc_server_packet_broadcast(server, server->router->connection, packet);
1782 /* If we have backup routers then we need to feed all broadcast
1783 data to those servers. */
1784 silc_server_backup_broadcast(server, sock, packet);
1789 silc_packet_context_free(packet);
1790 silc_free(parse_ctx);
1793 /* Parser callback called by silc_packet_receive_process. This merely
1794 registers timeout that will handle the actual parsing when appropriate. */
1796 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1799 SilcServer server = (SilcServer)context;
1800 SilcSocketConnection sock = parser_context->sock;
1801 SilcIDListData idata = (SilcIDListData)sock->user_data;
1804 idata->psn_receive = parser_context->packet->sequence + 1;
1806 /* If protocol for this connection is key exchange or rekey then we'll
1807 process all packets synchronously, since there might be packets in
1808 queue that we are not able to decrypt without first processing the
1809 packets before them. */
1810 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1811 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1812 (sock->protocol && sock->protocol->protocol &&
1813 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1814 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1815 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1818 /* Reprocess data since we'll return FALSE here. This is because
1819 the idata->receive_key might have become valid in the last packet
1820 and we want to call this processor with valid cipher. */
1822 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1823 TRUE : FALSE, idata->receive_key,
1824 idata->hmac_receive, idata->psn_receive,
1825 silc_server_packet_parse, server);
1827 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1828 TRUE : FALSE, NULL, NULL, 0,
1829 silc_server_packet_parse, server);
1833 switch (sock->type) {
1834 case SILC_SOCKET_TYPE_UNKNOWN:
1835 case SILC_SOCKET_TYPE_CLIENT:
1836 /* Parse the packet with timeout */
1837 silc_schedule_task_add(server->schedule, sock->sock,
1838 silc_server_packet_parse_real,
1839 (void *)parser_context, 0, 100000,
1841 SILC_TASK_PRI_NORMAL);
1843 case SILC_SOCKET_TYPE_SERVER:
1844 case SILC_SOCKET_TYPE_ROUTER:
1845 /* Packets from servers are parsed immediately */
1846 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1856 /* Parses the packet type and calls what ever routines the packet type
1857 requires. This is done for all incoming packets. */
1859 void silc_server_packet_parse_type(SilcServer server,
1860 SilcSocketConnection sock,
1861 SilcPacketContext *packet)
1863 SilcPacketType type = packet->type;
1864 SilcIDListData idata = (SilcIDListData)sock->user_data;
1866 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1868 /* Parse the packet type */
1870 case SILC_PACKET_DISCONNECT:
1871 SILC_LOG_DEBUG(("Disconnect packet"));
1872 if (packet->flags & SILC_PACKET_FLAG_LIST)
1874 if (silc_string_is_ascii(packet->buffer->data, packet->buffer->len)) {
1875 /* Duplicate to null terminate the string. */
1876 char *message = silc_memdup(packet->buffer->data, packet->buffer->len);
1877 SILC_LOG_ERROR(("%s", message));
1882 case SILC_PACKET_SUCCESS:
1884 * Success received for something. For now we can have only
1885 * one protocol for connection executing at once hence this
1886 * success message is for whatever protocol is executing currently.
1888 SILC_LOG_DEBUG(("Success packet"));
1889 if (packet->flags & SILC_PACKET_FLAG_LIST)
1892 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1895 case SILC_PACKET_FAILURE:
1897 * Failure received for something. For now we can have only
1898 * one protocol for connection executing at once hence this
1899 * failure message is for whatever protocol is executing currently.
1901 SILC_LOG_DEBUG(("Failure packet"));
1902 if (packet->flags & SILC_PACKET_FLAG_LIST)
1904 if (sock->protocol) {
1905 SilcServerFailureContext f;
1906 f = silc_calloc(1, sizeof(*f));
1910 /* We will wait 5 seconds to process this failure packet */
1911 silc_schedule_task_add(server->schedule, sock->sock,
1912 silc_server_failure_callback, (void *)f, 5, 0,
1913 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1917 case SILC_PACKET_REJECT:
1918 SILC_LOG_DEBUG(("Reject packet"));
1919 if (packet->flags & SILC_PACKET_FLAG_LIST)
1924 case SILC_PACKET_NOTIFY:
1926 * Received notify packet. Server can receive notify packets from
1927 * router. Server then relays the notify messages to clients if needed.
1929 SILC_LOG_DEBUG(("Notify packet"));
1930 if (packet->flags & SILC_PACKET_FLAG_LIST)
1931 silc_server_notify_list(server, sock, packet);
1933 silc_server_notify(server, sock, packet);
1939 case SILC_PACKET_CHANNEL_MESSAGE:
1941 * Received channel message. Channel messages are special packets
1942 * (although probably most common ones) thus they are handled
1945 SILC_LOG_DEBUG(("Channel Message packet"));
1946 if (packet->flags & SILC_PACKET_FLAG_LIST)
1948 idata->last_receive = time(NULL);
1949 silc_server_channel_message(server, sock, packet);
1952 case SILC_PACKET_CHANNEL_KEY:
1954 * Received key for channel. As channels are created by the router
1955 * the keys are as well. We will distribute the key to all of our
1956 * locally connected clients on the particular channel. Router
1957 * never receives this channel and thus is ignored.
1959 SILC_LOG_DEBUG(("Channel Key packet"));
1960 if (packet->flags & SILC_PACKET_FLAG_LIST)
1962 silc_server_channel_key(server, sock, packet);
1968 case SILC_PACKET_COMMAND:
1970 * Recived command. Processes the command request and allocates the
1971 * command context and calls the command.
1973 SILC_LOG_DEBUG(("Command packet"));
1974 if (packet->flags & SILC_PACKET_FLAG_LIST)
1976 silc_server_command_process(server, sock, packet);
1979 case SILC_PACKET_COMMAND_REPLY:
1981 * Received command reply packet. Received command reply to command. It
1982 * may be reply to command sent by us or reply to command sent by client
1983 * that we've routed further.
1985 SILC_LOG_DEBUG(("Command Reply packet"));
1986 if (packet->flags & SILC_PACKET_FLAG_LIST)
1988 silc_server_command_reply(server, sock, packet);
1992 * Private Message packets
1994 case SILC_PACKET_PRIVATE_MESSAGE:
1996 * Received private message packet. The packet is coming from either
1999 SILC_LOG_DEBUG(("Private Message packet"));
2000 if (packet->flags & SILC_PACKET_FLAG_LIST)
2002 idata->last_receive = time(NULL);
2003 silc_server_private_message(server, sock, packet);
2006 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2008 * Private message key packet.
2010 if (packet->flags & SILC_PACKET_FLAG_LIST)
2012 silc_server_private_message_key(server, sock, packet);
2016 * Key Exchange protocol packets
2018 case SILC_PACKET_KEY_EXCHANGE:
2019 SILC_LOG_DEBUG(("KE packet"));
2020 if (packet->flags & SILC_PACKET_FLAG_LIST)
2023 if (sock->protocol && sock->protocol->protocol &&
2024 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2025 SilcServerKEInternalContext *proto_ctx =
2026 (SilcServerKEInternalContext *)sock->protocol->context;
2028 proto_ctx->packet = silc_packet_context_dup(packet);
2030 /* Let the protocol handle the packet */
2031 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2033 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2034 "protocol active, packet dropped."));
2038 case SILC_PACKET_KEY_EXCHANGE_1:
2039 SILC_LOG_DEBUG(("KE 1 packet"));
2040 if (packet->flags & SILC_PACKET_FLAG_LIST)
2043 if (sock->protocol && sock->protocol->protocol &&
2044 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2045 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2047 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2048 SilcServerRekeyInternalContext *proto_ctx =
2049 (SilcServerRekeyInternalContext *)sock->protocol->context;
2051 if (proto_ctx->packet)
2052 silc_packet_context_free(proto_ctx->packet);
2054 proto_ctx->packet = silc_packet_context_dup(packet);
2056 /* Let the protocol handle the packet */
2057 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2059 SilcServerKEInternalContext *proto_ctx =
2060 (SilcServerKEInternalContext *)sock->protocol->context;
2062 if (proto_ctx->packet)
2063 silc_packet_context_free(proto_ctx->packet);
2065 proto_ctx->packet = silc_packet_context_dup(packet);
2066 proto_ctx->dest_id_type = packet->src_id_type;
2067 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2068 packet->src_id_type);
2069 if (!proto_ctx->dest_id)
2072 /* Let the protocol handle the packet */
2073 silc_protocol_execute(sock->protocol, server->schedule,
2077 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2078 "protocol active, packet dropped."));
2082 case SILC_PACKET_KEY_EXCHANGE_2:
2083 SILC_LOG_DEBUG(("KE 2 packet"));
2084 if (packet->flags & SILC_PACKET_FLAG_LIST)
2087 if (sock->protocol && sock->protocol->protocol &&
2088 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2089 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2091 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2092 SilcServerRekeyInternalContext *proto_ctx =
2093 (SilcServerRekeyInternalContext *)sock->protocol->context;
2095 if (proto_ctx->packet)
2096 silc_packet_context_free(proto_ctx->packet);
2098 proto_ctx->packet = silc_packet_context_dup(packet);
2100 /* Let the protocol handle the packet */
2101 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2103 SilcServerKEInternalContext *proto_ctx =
2104 (SilcServerKEInternalContext *)sock->protocol->context;
2106 if (proto_ctx->packet)
2107 silc_packet_context_free(proto_ctx->packet);
2109 proto_ctx->packet = silc_packet_context_dup(packet);
2110 proto_ctx->dest_id_type = packet->src_id_type;
2111 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2112 packet->src_id_type);
2113 if (!proto_ctx->dest_id)
2116 /* Let the protocol handle the packet */
2117 silc_protocol_execute(sock->protocol, server->schedule,
2121 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2122 "protocol active, packet dropped."));
2126 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2128 * Connection authentication request packet. When we receive this packet
2129 * we will send to the other end information about our mandatory
2130 * authentication method for the connection. This packet maybe received
2133 SILC_LOG_DEBUG(("Connection authentication request packet"));
2134 if (packet->flags & SILC_PACKET_FLAG_LIST)
2136 silc_server_connection_auth_request(server, sock, packet);
2140 * Connection Authentication protocol packets
2142 case SILC_PACKET_CONNECTION_AUTH:
2143 /* Start of the authentication protocol. We receive here the
2144 authentication data and will verify it. */
2145 SILC_LOG_DEBUG(("Connection auth packet"));
2146 if (packet->flags & SILC_PACKET_FLAG_LIST)
2149 if (sock->protocol && sock->protocol->protocol->type
2150 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2152 SilcServerConnAuthInternalContext *proto_ctx =
2153 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2155 proto_ctx->packet = silc_packet_context_dup(packet);
2157 /* Let the protocol handle the packet */
2158 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2160 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2161 "protocol active, packet dropped."));
2165 case SILC_PACKET_NEW_ID:
2167 * Received New ID packet. This includes some new ID that has been
2168 * created. It may be for client, server or channel. This is the way
2169 * to distribute information about new registered entities in the
2172 SILC_LOG_DEBUG(("New ID packet"));
2173 if (packet->flags & SILC_PACKET_FLAG_LIST)
2174 silc_server_new_id_list(server, sock, packet);
2176 silc_server_new_id(server, sock, packet);
2179 case SILC_PACKET_NEW_CLIENT:
2181 * Received new client packet. This includes client information that
2182 * we will use to create initial client ID. After creating new
2183 * ID we will send it to the client.
2185 SILC_LOG_DEBUG(("New Client packet"));
2186 if (packet->flags & SILC_PACKET_FLAG_LIST)
2188 silc_server_new_client(server, sock, packet);
2191 case SILC_PACKET_NEW_SERVER:
2193 * Received new server packet. This includes Server ID and some other
2194 * information that we may save. This is received after server has
2197 SILC_LOG_DEBUG(("New Server packet"));
2198 if (packet->flags & SILC_PACKET_FLAG_LIST)
2200 silc_server_new_server(server, sock, packet);
2203 case SILC_PACKET_NEW_CHANNEL:
2205 * Received new channel packet. Information about new channel in the
2206 * network are distributed using this packet.
2208 SILC_LOG_DEBUG(("New Channel packet"));
2209 if (packet->flags & SILC_PACKET_FLAG_LIST)
2210 silc_server_new_channel_list(server, sock, packet);
2212 silc_server_new_channel(server, sock, packet);
2215 case SILC_PACKET_HEARTBEAT:
2217 * Received heartbeat.
2219 SILC_LOG_DEBUG(("Heartbeat packet"));
2220 if (packet->flags & SILC_PACKET_FLAG_LIST)
2224 case SILC_PACKET_KEY_AGREEMENT:
2226 * Received heartbeat.
2228 SILC_LOG_DEBUG(("Key agreement packet"));
2229 if (packet->flags & SILC_PACKET_FLAG_LIST)
2231 silc_server_key_agreement(server, sock, packet);
2234 case SILC_PACKET_REKEY:
2236 * Received re-key packet. The sender wants to regenerate the session
2239 SILC_LOG_DEBUG(("Re-key packet"));
2240 if (packet->flags & SILC_PACKET_FLAG_LIST)
2242 silc_server_rekey(server, sock, packet);
2245 case SILC_PACKET_REKEY_DONE:
2247 * The re-key is done.
2249 SILC_LOG_DEBUG(("Re-key done packet"));
2250 if (packet->flags & SILC_PACKET_FLAG_LIST)
2253 if (sock->protocol && sock->protocol->protocol &&
2254 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2256 SilcServerRekeyInternalContext *proto_ctx =
2257 (SilcServerRekeyInternalContext *)sock->protocol->context;
2259 if (proto_ctx->packet)
2260 silc_packet_context_free(proto_ctx->packet);
2262 proto_ctx->packet = silc_packet_context_dup(packet);
2264 /* Let the protocol handle the packet */
2265 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2267 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2268 "protocol active, packet dropped."));
2272 case SILC_PACKET_FTP:
2274 SILC_LOG_DEBUG(("FTP packet"));
2275 if (packet->flags & SILC_PACKET_FLAG_LIST)
2277 silc_server_ftp(server, sock, packet);
2280 case SILC_PACKET_RESUME_ROUTER:
2281 /* Resume router packet received. This packet is received for backup
2282 router resuming protocol. */
2283 SILC_LOG_DEBUG(("Resume router packet"));
2284 if (packet->flags & SILC_PACKET_FLAG_LIST)
2286 silc_server_backup_resume_router(server, sock, packet);
2290 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2296 /* Creates connection to a remote router. */
2298 void silc_server_create_connection(SilcServer server,
2299 const char *remote_host, SilcUInt32 port)
2301 SilcServerConnection sconn;
2303 /* Allocate connection object for hold connection specific stuff. */
2304 sconn = silc_calloc(1, sizeof(*sconn));
2305 sconn->server = server;
2306 sconn->remote_host = strdup(remote_host);
2307 sconn->remote_port = port;
2308 sconn->no_reconnect = TRUE;
2310 silc_schedule_task_add(server->schedule, 0,
2311 silc_server_connect_router,
2312 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2313 SILC_TASK_PRI_NORMAL);
2316 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2318 silc_socket_free((SilcSocketConnection)context);
2321 /* Closes connection to socket connection */
2323 void silc_server_close_connection(SilcServer server,
2324 SilcSocketConnection sock)
2326 if (!server->sockets[sock->sock])
2329 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2331 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2332 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2333 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2336 /* We won't listen for this connection anymore */
2337 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2339 /* Unregister all tasks */
2340 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2342 /* Close the actual connection */
2343 silc_net_close_connection(sock->sock);
2344 server->sockets[sock->sock] = NULL;
2346 /* If sock->user_data is NULL then we'll check for active protocols
2347 here since the silc_server_free_sock_user_data has not been called
2348 for this connection. */
2349 if (!sock->user_data) {
2350 /* If any protocol is active cancel its execution. It will call
2351 the final callback which will finalize the disconnection. */
2352 if (sock->protocol) {
2353 silc_protocol_cancel(sock->protocol, server->schedule);
2354 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2355 silc_protocol_execute_final(sock->protocol, server->schedule);
2356 sock->protocol = NULL;
2361 silc_schedule_task_add(server->schedule, 0,
2362 silc_server_close_connection_final,
2363 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2364 SILC_TASK_PRI_NORMAL);
2367 /* Sends disconnect message to remote connection and disconnects the
2370 void silc_server_disconnect_remote(SilcServer server,
2371 SilcSocketConnection sock,
2372 const char *fmt, ...)
2375 unsigned char buf[4096];
2380 memset(buf, 0, sizeof(buf));
2382 vsprintf(buf, fmt, ap);
2385 SILC_LOG_DEBUG(("Disconnecting remote host"));
2387 /* Notify remote end that the conversation is over. The notify message
2388 is tried to be sent immediately. */
2389 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2390 buf, strlen(buf), TRUE);
2391 silc_server_packet_queue_purge(server, sock);
2393 /* Mark the connection to be disconnected */
2394 SILC_SET_DISCONNECTED(sock);
2395 silc_server_close_connection(server, sock);
2400 SilcClientEntry client;
2401 } *FreeClientInternal;
2403 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2405 FreeClientInternal i = (FreeClientInternal)context;
2407 silc_idlist_del_data(i->client);
2408 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2412 /* Frees client data and notifies about client's signoff. */
2414 void silc_server_free_client_data(SilcServer server,
2415 SilcSocketConnection sock,
2416 SilcClientEntry client,
2418 const char *signoff)
2420 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2422 /* If there is pending outgoing data for the client then purge it
2423 to the network before removing the client entry. */
2424 silc_server_packet_queue_purge(server, sock);
2429 /* Send SIGNOFF notify to routers. */
2430 if (notify && !server->standalone && server->router)
2431 silc_server_send_notify_signoff(server, server->router->connection,
2432 server->server_type == SILC_SERVER ?
2433 FALSE : TRUE, client->id, signoff);
2435 /* Remove client from all channels */
2437 silc_server_remove_from_channels(server, NULL, client,
2438 TRUE, (char *)signoff, TRUE);
2440 silc_server_remove_from_channels(server, NULL, client,
2441 FALSE, NULL, FALSE);
2443 /* Update statistics */
2444 server->stat.my_clients--;
2445 server->stat.clients--;
2446 if (server->server_type == SILC_ROUTER)
2447 server->stat.cell_clients--;
2448 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2449 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2451 /* We will not delete the client entry right away. We will take it
2452 into history (for WHOWAS command) for 5 minutes */
2455 silc_schedule_task_add(server->schedule, 0,
2456 silc_server_free_client_data_timeout,
2458 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2459 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2460 client->router = NULL;
2461 client->connection = NULL;
2465 /* Frees user_data pointer from socket connection object. This also sends
2466 appropriate notify packets to the network to inform about leaving
2469 void silc_server_free_sock_user_data(SilcServer server,
2470 SilcSocketConnection sock,
2471 const char *signoff_message)
2473 SILC_LOG_DEBUG(("Start"));
2475 switch (sock->type) {
2476 case SILC_SOCKET_TYPE_CLIENT:
2478 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2479 silc_server_free_client_data(server, sock, user_data, TRUE,
2483 case SILC_SOCKET_TYPE_SERVER:
2484 case SILC_SOCKET_TYPE_ROUTER:
2486 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2487 SilcServerEntry backup_router = NULL;
2490 backup_router = silc_server_backup_get(server, user_data->id);
2492 /* If this was our primary router connection then we're lost to
2493 the outside world. */
2494 if (server->router == user_data) {
2495 /* Check whether we have a backup router connection */
2496 if (!backup_router || backup_router == user_data) {
2497 silc_schedule_task_add(server->schedule, 0,
2498 silc_server_connect_to_router,
2501 SILC_TASK_PRI_NORMAL);
2503 server->id_entry->router = NULL;
2504 server->router = NULL;
2505 server->standalone = TRUE;
2506 backup_router = NULL;
2508 SILC_LOG_INFO(("New primary router is backup router %s",
2509 backup_router->server_name));
2510 SILC_LOG_DEBUG(("New primary router is backup router %s",
2511 backup_router->server_name));
2512 server->id_entry->router = backup_router;
2513 server->router = backup_router;
2514 server->router_connect = time(0);
2515 server->backup_primary = TRUE;
2516 if (server->server_type == SILC_BACKUP_ROUTER) {
2517 server->server_type = SILC_ROUTER;
2519 /* We'll need to constantly try to reconnect to the primary
2520 router so that we'll see when it comes back online. */
2521 silc_server_backup_reconnect(server, sock->ip, sock->port,
2522 silc_server_backup_connected,
2526 /* Mark this connection as replaced */
2527 silc_server_backup_replaced_add(server, user_data->id,
2530 } else if (backup_router) {
2531 SILC_LOG_INFO(("Enabling the use of backup router %s",
2532 backup_router->server_name));
2533 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2534 backup_router->server_name));
2536 /* Mark this connection as replaced */
2537 silc_server_backup_replaced_add(server, user_data->id,
2541 if (!backup_router) {
2542 /* Free all client entries that this server owns as they will
2543 become invalid now as well. */
2545 silc_server_remove_clients_by_server(server, user_data, TRUE);
2546 if (server->server_type == SILC_SERVER)
2547 silc_server_remove_channels_by_server(server, user_data);
2549 /* Update the client entries of this server to the new backup
2550 router. This also removes the clients that *really* was owned
2551 by the primary router and went down with the router. */
2552 silc_server_update_clients_by_server(server, user_data, backup_router,
2554 silc_server_update_servers_by_server(server, user_data, backup_router);
2555 if (server->server_type == SILC_SERVER)
2556 silc_server_update_channels_by_server(server, user_data,
2560 /* Free the server entry */
2561 silc_server_backup_del(server, user_data);
2562 silc_server_backup_replaced_del(server, user_data);
2563 silc_idlist_del_data(user_data);
2564 if (!silc_idlist_del_server(server->local_list, user_data))
2565 silc_idlist_del_server(server->global_list, user_data);
2566 server->stat.my_servers--;
2567 server->stat.servers--;
2568 if (server->server_type == SILC_ROUTER)
2569 server->stat.cell_servers--;
2571 if (backup_router) {
2572 /* Announce all of our stuff that was created about 5 minutes ago.
2573 The backup router knows all the other stuff already. */
2574 if (server->server_type == SILC_ROUTER)
2575 silc_server_announce_servers(server, FALSE, time(0) - 300,
2576 backup_router->connection);
2578 /* Announce our clients and channels to the router */
2579 silc_server_announce_clients(server, time(0) - 300,
2580 backup_router->connection);
2581 silc_server_announce_channels(server, time(0) - 300,
2582 backup_router->connection);
2588 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2590 silc_idlist_del_data(user_data);
2591 silc_free(user_data);
2596 /* If any protocol is active cancel its execution */
2597 if (sock->protocol) {
2598 silc_protocol_cancel(sock->protocol, server->schedule);
2599 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2600 silc_protocol_execute_final(sock->protocol, server->schedule);
2601 sock->protocol = NULL;
2604 sock->user_data = NULL;
2607 /* Removes client from all channels it has joined. This is used when client
2608 connection is disconnected. If the client on a channel is last, the
2609 channel is removed as well. This sends the SIGNOFF notify types. */
2611 void silc_server_remove_from_channels(SilcServer server,
2612 SilcSocketConnection sock,
2613 SilcClientEntry client,
2615 char *signoff_message,
2618 SilcChannelEntry channel;
2619 SilcChannelClientEntry chl;
2620 SilcHashTableList htl;
2623 SILC_LOG_DEBUG(("Start"));
2625 if (!client || !client->id)
2628 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2630 /* Remove the client from all channels. The client is removed from
2631 the channels' user list. */
2632 silc_hash_table_list(client->channels, &htl);
2633 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2634 channel = chl->channel;
2636 /* Remove channel from client's channel list */
2637 silc_hash_table_del(client->channels, channel);
2639 /* Remove channel if there is no users anymore */
2640 if (server->server_type == SILC_ROUTER &&
2641 silc_hash_table_count(channel->user_list) < 2) {
2643 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2644 if (silc_idlist_del_channel(server->local_list, channel))
2645 server->stat.my_channels--;
2647 silc_idlist_del_channel(server->global_list, channel);
2651 /* Remove client from channel's client list */
2652 silc_hash_table_del(channel->user_list, chl->client);
2653 channel->user_count--;
2655 /* If there is no global users on the channel anymore mark the channel
2656 as local channel. Do not check if the removed client is local client. */
2657 if (server->server_type != SILC_ROUTER && channel->global_users &&
2658 chl->client->router && !silc_server_channel_has_global(channel))
2659 channel->global_users = FALSE;
2662 server->stat.my_chanclients--;
2664 /* If there is not at least one local user on the channel then we don't
2665 need the channel entry anymore, we can remove it safely. */
2666 if (server->server_type != SILC_ROUTER &&
2667 !silc_server_channel_has_local(channel)) {
2668 /* Notify about leaving client if this channel has global users. */
2669 if (notify && channel->global_users)
2670 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2671 SILC_NOTIFY_TYPE_SIGNOFF,
2672 signoff_message ? 2 : 1,
2673 clidp->data, clidp->len,
2674 signoff_message, signoff_message ?
2675 strlen(signoff_message) : 0);
2678 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2680 if (channel->founder_key) {
2681 /* The founder auth data exists, do not remove the channel entry */
2682 SilcChannelClientEntry chl2;
2683 SilcHashTableList htl2;
2685 channel->disabled = TRUE;
2687 silc_hash_table_list(channel->user_list, &htl2);
2688 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2689 silc_hash_table_del(chl2->client->channels, channel);
2690 silc_hash_table_del(channel->user_list, chl2->client);
2691 channel->user_count--;
2694 silc_hash_table_list_reset(&htl2);
2698 /* Remove the channel entry */
2699 if (silc_idlist_del_channel(server->local_list, channel))
2700 server->stat.my_channels--;
2702 silc_idlist_del_channel(server->global_list, channel);
2706 /* Send notify to channel about client leaving SILC and thus
2707 the entire channel. */
2709 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2710 SILC_NOTIFY_TYPE_SIGNOFF,
2711 signoff_message ? 2 : 1,
2712 clidp->data, clidp->len,
2713 signoff_message, signoff_message ?
2714 strlen(signoff_message) : 0);
2716 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2717 /* Re-generate channel key */
2718 if (!silc_server_create_channel_key(server, channel, 0))
2721 /* Send the channel key to the channel. The key of course is not sent
2722 to the client who was removed from the channel. */
2723 silc_server_send_channel_key(server, client->connection, channel,
2724 server->server_type == SILC_ROUTER ?
2725 FALSE : !server->standalone);
2730 silc_hash_table_list_reset(&htl);
2731 silc_buffer_free(clidp);
2734 /* Removes client from one channel. This is used for example when client
2735 calls LEAVE command to remove itself from the channel. Returns TRUE
2736 if channel still exists and FALSE if the channel is removed when
2737 last client leaves the channel. If `notify' is FALSE notify messages
2740 int silc_server_remove_from_one_channel(SilcServer server,
2741 SilcSocketConnection sock,
2742 SilcChannelEntry channel,
2743 SilcClientEntry client,
2746 SilcChannelClientEntry chl;
2749 SILC_LOG_DEBUG(("Start"));
2751 /* Get the entry to the channel, if this client is not on the channel
2753 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2756 /* Remove the client from the channel. The client is removed from
2757 the channel's user list. */
2759 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2761 /* Remove channel from client's channel list */
2762 silc_hash_table_del(client->channels, chl->channel);
2764 /* Remove channel if there is no users anymore */
2765 if (server->server_type == SILC_ROUTER &&
2766 silc_hash_table_count(channel->user_list) < 2) {
2768 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2769 if (silc_idlist_del_channel(server->local_list, channel))
2770 server->stat.my_channels--;
2772 silc_idlist_del_channel(server->global_list, channel);
2773 silc_buffer_free(clidp);
2777 /* Remove client from channel's client list */
2778 silc_hash_table_del(channel->user_list, chl->client);
2779 channel->user_count--;
2781 /* If there is no global users on the channel anymore mark the channel
2782 as local channel. Do not check if the client is local client. */
2783 if (server->server_type != SILC_ROUTER && channel->global_users &&
2784 chl->client->router && !silc_server_channel_has_global(channel))
2785 channel->global_users = FALSE;
2788 server->stat.my_chanclients--;
2790 /* If there is not at least one local user on the channel then we don't
2791 need the channel entry anymore, we can remove it safely. */
2792 if (server->server_type != SILC_ROUTER &&
2793 !silc_server_channel_has_local(channel)) {
2794 /* Notify about leaving client if this channel has global users. */
2795 if (notify && channel->global_users)
2796 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2797 SILC_NOTIFY_TYPE_LEAVE, 1,
2798 clidp->data, clidp->len);
2800 silc_buffer_free(clidp);
2803 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2805 if (channel->founder_key) {
2806 /* The founder auth data exists, do not remove the channel entry */
2807 SilcChannelClientEntry chl2;
2808 SilcHashTableList htl2;
2810 channel->disabled = TRUE;
2812 silc_hash_table_list(channel->user_list, &htl2);
2813 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2814 silc_hash_table_del(chl2->client->channels, channel);
2815 silc_hash_table_del(channel->user_list, chl2->client);
2816 channel->user_count--;
2819 silc_hash_table_list_reset(&htl2);
2823 /* Remove the channel entry */
2824 if (silc_idlist_del_channel(server->local_list, channel))
2825 server->stat.my_channels--;
2827 silc_idlist_del_channel(server->global_list, channel);
2831 /* Send notify to channel about client leaving the channel */
2833 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2834 SILC_NOTIFY_TYPE_LEAVE, 1,
2835 clidp->data, clidp->len);
2837 silc_buffer_free(clidp);
2841 /* Timeout callback. This is called if connection is idle or for some
2842 other reason is not responding within some period of time. This
2843 disconnects the remote end. */
2845 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2847 SilcServer server = (SilcServer)context;
2848 SilcSocketConnection sock = server->sockets[fd];
2850 SILC_LOG_DEBUG(("Start"));
2855 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
2856 sock->hostname, sock->ip));
2858 /* If we have protocol active we must assure that we call the protocol's
2859 final callback so that all the memory is freed. */
2860 if (sock->protocol) {
2861 silc_protocol_cancel(sock->protocol, server->schedule);
2862 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2863 silc_protocol_execute_final(sock->protocol, server->schedule);
2864 sock->protocol = NULL;
2868 if (sock->user_data)
2869 silc_server_free_sock_user_data(server, sock, NULL);
2871 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2872 "Connection timeout");
2875 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2876 function may be used only by router. In real SILC network all channels
2877 are created by routers thus this function is never used by normal
2880 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2881 SilcServerID *router_id,
2887 SilcChannelID *channel_id;
2888 SilcChannelEntry entry;
2892 SILC_LOG_DEBUG(("Creating new channel"));
2895 cipher = SILC_DEFAULT_CIPHER;
2897 hmac = SILC_DEFAULT_HMAC;
2899 /* Allocate cipher */
2900 if (!silc_cipher_alloc(cipher, &key))
2904 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2905 silc_cipher_free(key);
2909 channel_name = strdup(channel_name);
2911 /* Create the channel ID */
2912 if (!silc_id_create_channel_id(server, router_id, server->rng,
2914 silc_free(channel_name);
2915 silc_cipher_free(key);
2916 silc_hmac_free(newhmac);
2920 /* Create the channel */
2921 entry = silc_idlist_add_channel(server->local_list, channel_name,
2922 SILC_CHANNEL_MODE_NONE, channel_id,
2923 NULL, key, newhmac, 0);
2925 silc_free(channel_name);
2926 silc_cipher_free(key);
2927 silc_hmac_free(newhmac);
2928 silc_free(channel_id);
2932 entry->cipher = strdup(cipher);
2933 entry->hmac_name = strdup(hmac);
2935 /* Now create the actual key material */
2936 if (!silc_server_create_channel_key(server, entry,
2937 silc_cipher_get_key_len(key) / 8)) {
2938 silc_idlist_del_channel(server->local_list, entry);
2942 /* Notify other routers about the new channel. We send the packet
2943 to our primary route. */
2944 if (broadcast && server->standalone == FALSE)
2945 silc_server_send_new_channel(server, server->router->connection, TRUE,
2946 channel_name, entry->id,
2947 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2950 server->stat.my_channels++;
2955 /* Same as above but creates the channel with Channel ID `channel_id. */
2958 silc_server_create_new_channel_with_id(SilcServer server,
2962 SilcChannelID *channel_id,
2965 SilcChannelEntry entry;
2969 SILC_LOG_DEBUG(("Creating new channel"));
2972 cipher = SILC_DEFAULT_CIPHER;
2974 hmac = SILC_DEFAULT_HMAC;
2976 /* Allocate cipher */
2977 if (!silc_cipher_alloc(cipher, &key))
2981 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2982 silc_cipher_free(key);
2986 channel_name = strdup(channel_name);
2988 /* Create the channel */
2989 entry = silc_idlist_add_channel(server->local_list, channel_name,
2990 SILC_CHANNEL_MODE_NONE, channel_id,
2991 NULL, key, newhmac, 0);
2993 silc_cipher_free(key);
2994 silc_hmac_free(newhmac);
2995 silc_free(channel_name);
2999 /* Now create the actual key material */
3000 if (!silc_server_create_channel_key(server, entry,
3001 silc_cipher_get_key_len(key) / 8)) {
3002 silc_idlist_del_channel(server->local_list, entry);
3006 /* Notify other routers about the new channel. We send the packet
3007 to our primary route. */
3008 if (broadcast && server->standalone == FALSE)
3009 silc_server_send_new_channel(server, server->router->connection, TRUE,
3010 channel_name, entry->id,
3011 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3014 server->stat.my_channels++;
3019 /* Channel's key re-key timeout callback. */
3021 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3023 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3024 SilcServer server = (SilcServer)rekey->context;
3028 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3031 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3034 /* Generates new channel key. This is used to create the initial channel key
3035 but also to re-generate new key for channel. If `key_len' is provided
3036 it is the bytes of the key length. */
3038 bool silc_server_create_channel_key(SilcServer server,
3039 SilcChannelEntry channel,
3043 unsigned char channel_key[32], hash[32];
3046 SILC_LOG_DEBUG(("Generating channel key"));
3048 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3049 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3053 if (!channel->channel_key)
3054 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3055 channel->channel_key = NULL;
3061 else if (channel->key_len)
3062 len = channel->key_len / 8;
3064 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3066 /* Create channel key */
3067 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3070 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3072 /* Remove old key if exists */
3074 memset(channel->key, 0, channel->key_len / 8);
3075 silc_free(channel->key);
3079 channel->key_len = len * 8;
3080 channel->key = silc_memdup(channel_key, len);
3081 memset(channel_key, 0, sizeof(channel_key));
3083 /* Generate HMAC key from the channel key data and set it */
3085 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3086 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3087 silc_hmac_set_key(channel->hmac, hash,
3088 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3089 memset(hash, 0, sizeof(hash));
3091 if (server->server_type == SILC_ROUTER) {
3092 if (!channel->rekey)
3093 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3094 channel->rekey->context = (void *)server;
3095 channel->rekey->channel = channel;
3096 channel->rekey->key_len = key_len;
3097 if (channel->rekey->task)
3098 silc_schedule_task_del(server->schedule, channel->rekey->task);
3100 channel->rekey->task =
3101 silc_schedule_task_add(server->schedule, 0,
3102 silc_server_channel_key_rekey,
3103 (void *)channel->rekey,
3104 server->config->channel_rekey_secs, 0,
3106 SILC_TASK_PRI_NORMAL);
3112 /* Saves the channel key found in the encoded `key_payload' buffer. This
3113 function is used when we receive Channel Key Payload and also when we're
3114 processing JOIN command reply. Returns entry to the channel. */
3116 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3117 SilcBuffer key_payload,
3118 SilcChannelEntry channel)
3120 SilcChannelKeyPayload payload = NULL;
3121 SilcChannelID *id = NULL;
3122 unsigned char *tmp, hash[32];
3126 SILC_LOG_DEBUG(("Start"));
3128 /* Decode channel key payload */
3129 payload = silc_channel_key_payload_parse(key_payload->data,
3132 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3137 /* Get the channel entry */
3140 /* Get channel ID */
3141 tmp = silc_channel_key_get_id(payload, &tmp_len);
3142 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3148 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3150 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3152 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3153 silc_id_render(id, SILC_ID_CHANNEL)));
3159 tmp = silc_channel_key_get_key(payload, &tmp_len);
3165 cipher = silc_channel_key_get_cipher(payload, NULL);
3171 /* Remove old key if exists */
3173 memset(channel->key, 0, channel->key_len / 8);
3174 silc_free(channel->key);
3175 silc_cipher_free(channel->channel_key);
3178 /* Create new cipher */
3179 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3180 channel->channel_key = NULL;
3185 if (channel->cipher)
3186 silc_free(channel->cipher);
3187 channel->cipher = strdup(cipher);
3190 channel->key_len = tmp_len * 8;
3191 channel->key = silc_memdup(tmp, tmp_len);
3192 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3194 /* Generate HMAC key from the channel key data and set it */
3196 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3197 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3198 silc_hmac_set_key(channel->hmac, hash,
3199 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3201 memset(hash, 0, sizeof(hash));
3202 memset(tmp, 0, tmp_len);
3204 if (server->server_type == SILC_ROUTER) {
3205 if (!channel->rekey)
3206 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3207 channel->rekey->context = (void *)server;
3208 channel->rekey->channel = channel;
3209 if (channel->rekey->task)
3210 silc_schedule_task_del(server->schedule, channel->rekey->task);
3212 channel->rekey->task =
3213 silc_schedule_task_add(server->schedule, 0,
3214 silc_server_channel_key_rekey,
3215 (void *)channel->rekey,
3216 server->config->channel_rekey_secs, 0,
3218 SILC_TASK_PRI_NORMAL);
3224 silc_channel_key_payload_free(payload);
3229 /* Heartbeat callback. This function is set as argument for the
3230 silc_socket_set_heartbeat function. The library will call this function
3231 at the set time interval. */
3233 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3236 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3238 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3240 /* Send the heartbeat */
3241 silc_server_send_heartbeat(hb->server, sock);
3244 /* Returns assembled of all servers in the given ID list. The packet's
3245 form is dictated by the New ID payload. */
3247 static void silc_server_announce_get_servers(SilcServer server,
3248 SilcServerEntry remote,
3250 SilcBuffer *servers,
3251 unsigned long creation_time)
3253 SilcIDCacheList list;
3254 SilcIDCacheEntry id_cache;
3255 SilcServerEntry entry;
3258 /* Go through all clients in the list */
3259 if (silc_idcache_get_all(id_list->servers, &list)) {
3260 if (silc_idcache_list_first(list, &id_cache)) {
3262 entry = (SilcServerEntry)id_cache->context;
3264 /* Do not announce the one we've sending our announcements and
3265 do not announce ourself. Also check the creation time if it's
3267 if ((entry == remote) || (entry == server->id_entry) ||
3268 (creation_time && entry->data.created < creation_time)) {
3269 if (!silc_idcache_list_next(list, &id_cache))
3274 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3276 *servers = silc_buffer_realloc(*servers,
3278 (*servers)->truelen + idp->len :
3280 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3281 silc_buffer_put(*servers, idp->data, idp->len);
3282 silc_buffer_pull(*servers, idp->len);
3283 silc_buffer_free(idp);
3285 if (!silc_idcache_list_next(list, &id_cache))
3290 silc_idcache_list_free(list);
3295 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3301 p = silc_notify_payload_encode(notify, argc, ap);
3307 /* This function is used by router to announce existing servers to our
3308 primary router when we've connected to it. If `creation_time' is non-zero
3309 then only the servers that has been created after the `creation_time'
3310 will be announced. */
3312 void silc_server_announce_servers(SilcServer server, bool global,
3313 unsigned long creation_time,
3314 SilcSocketConnection remote)
3316 SilcBuffer servers = NULL;
3318 SILC_LOG_DEBUG(("Announcing servers"));
3320 /* Get servers in local list */
3321 silc_server_announce_get_servers(server, remote->user_data,
3322 server->local_list, &servers,
3326 /* Get servers in global list */
3327 silc_server_announce_get_servers(server, remote->user_data,
3328 server->global_list, &servers,
3332 silc_buffer_push(servers, servers->data - servers->head);
3333 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3335 /* Send the packet */
3336 silc_server_packet_send(server, remote,
3337 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3338 servers->data, servers->len, TRUE);
3340 silc_buffer_free(servers);
3344 /* Returns assembled packet of all clients in the given ID list. The
3345 packet's form is dictated by the New ID Payload. */
3347 static void silc_server_announce_get_clients(SilcServer server,
3349 SilcBuffer *clients,
3351 unsigned long creation_time)
3353 SilcIDCacheList list;
3354 SilcIDCacheEntry id_cache;
3355 SilcClientEntry client;
3358 unsigned char mode[4];
3360 /* Go through all clients in the list */
3361 if (silc_idcache_get_all(id_list->clients, &list)) {
3362 if (silc_idcache_list_first(list, &id_cache)) {
3364 client = (SilcClientEntry)id_cache->context;
3366 if (creation_time && client->data.created < creation_time) {
3367 if (!silc_idcache_list_next(list, &id_cache))
3372 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3374 *clients = silc_buffer_realloc(*clients,
3376 (*clients)->truelen + idp->len :
3378 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3379 silc_buffer_put(*clients, idp->data, idp->len);
3380 silc_buffer_pull(*clients, idp->len);
3382 SILC_PUT32_MSB(client->mode, mode);
3383 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3384 2, idp->data, idp->len,
3386 *umodes = silc_buffer_realloc(*umodes,
3388 (*umodes)->truelen + tmp->len :
3390 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3391 silc_buffer_put(*umodes, tmp->data, tmp->len);
3392 silc_buffer_pull(*umodes, tmp->len);
3393 silc_buffer_free(tmp);
3395 silc_buffer_free(idp);
3397 if (!silc_idcache_list_next(list, &id_cache))
3402 silc_idcache_list_free(list);
3406 /* This function is used to announce our existing clients to our router
3407 when we've connected to it. If `creation_time' is non-zero then only
3408 the clients that has been created after the `creation_time' will be
3411 void silc_server_announce_clients(SilcServer server,
3412 unsigned long creation_time,
3413 SilcSocketConnection remote)
3415 SilcBuffer clients = NULL;
3416 SilcBuffer umodes = NULL;
3418 SILC_LOG_DEBUG(("Announcing clients"));
3420 /* Get clients in local list */
3421 silc_server_announce_get_clients(server, server->local_list,
3422 &clients, &umodes, creation_time);
3424 /* As router we announce our global list as well */
3425 if (server->server_type == SILC_ROUTER)
3426 silc_server_announce_get_clients(server, server->global_list,
3427 &clients, &umodes, creation_time);
3430 silc_buffer_push(clients, clients->data - clients->head);
3431 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3433 /* Send the packet */
3434 silc_server_packet_send(server, remote,
3435 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3436 clients->data, clients->len, TRUE);
3438 silc_buffer_free(clients);
3442 silc_buffer_push(umodes, umodes->data - umodes->head);
3443 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3445 /* Send the packet */
3446 silc_server_packet_send(server, remote,
3447 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3448 umodes->data, umodes->len, TRUE);
3450 silc_buffer_free(umodes);
3454 /* Returns channel's topic for announcing it */
3456 void silc_server_announce_get_channel_topic(SilcServer server,
3457 SilcChannelEntry channel,
3462 if (channel->topic) {
3463 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3464 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3465 chidp->data, chidp->len,
3467 strlen(channel->topic));
3468 silc_buffer_free(chidp);
3472 /* Returns assembled packets for channel users of the `channel'. */
3474 void silc_server_announce_get_channel_users(SilcServer server,
3475 SilcChannelEntry channel,
3476 SilcBuffer *channel_users,
3477 SilcBuffer *channel_users_modes)
3479 SilcChannelClientEntry chl;
3480 SilcHashTableList htl;
3481 SilcBuffer chidp, clidp;
3484 unsigned char mode[4];
3486 SILC_LOG_DEBUG(("Start"));
3488 /* Now find all users on the channel */
3489 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3490 silc_hash_table_list(channel->user_list, &htl);
3491 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3492 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3495 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3496 clidp->data, clidp->len,
3497 chidp->data, chidp->len);
3500 silc_buffer_realloc(*channel_users,
3502 (*channel_users)->truelen + len : len));
3503 silc_buffer_pull_tail(*channel_users,
3504 ((*channel_users)->end -
3505 (*channel_users)->data));
3507 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3508 silc_buffer_pull(*channel_users, len);
3509 silc_buffer_free(tmp);
3511 /* CUMODE notify for mode change on the channel */
3512 SILC_PUT32_MSB(chl->mode, mode);
3513 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3514 3, clidp->data, clidp->len,
3516 clidp->data, clidp->len);
3518 *channel_users_modes =
3519 silc_buffer_realloc(*channel_users_modes,
3520 (*channel_users_modes ?
3521 (*channel_users_modes)->truelen + len : len));
3522 silc_buffer_pull_tail(*channel_users_modes,
3523 ((*channel_users_modes)->end -
3524 (*channel_users_modes)->data));
3526 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3527 silc_buffer_pull(*channel_users_modes, len);
3528 silc_buffer_free(tmp);
3530 silc_buffer_free(clidp);
3532 silc_hash_table_list_reset(&htl);
3533 silc_buffer_free(chidp);
3536 /* Returns assembled packets for all channels and users on those channels
3537 from the given ID List. The packets are in the form dictated by the
3538 New Channel and New Channel User payloads. */
3540 void silc_server_announce_get_channels(SilcServer server,
3542 SilcBuffer *channels,
3543 SilcBuffer *channel_users,
3544 SilcBuffer **channel_users_modes,
3545 SilcUInt32 *channel_users_modes_c,
3546 SilcBuffer **channel_topics,
3547 SilcChannelID ***channel_ids,
3548 unsigned long creation_time)
3550 SilcIDCacheList list;
3551 SilcIDCacheEntry id_cache;
3552 SilcChannelEntry channel;
3555 SilcUInt16 name_len;
3557 int i = *channel_users_modes_c;
3560 SILC_LOG_DEBUG(("Start"));
3562 /* Go through all channels in the list */
3563 if (silc_idcache_get_all(id_list->channels, &list)) {
3564 if (silc_idcache_list_first(list, &id_cache)) {
3566 channel = (SilcChannelEntry)id_cache->context;
3568 if (creation_time && channel->created < creation_time)
3573 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3574 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3575 name_len = strlen(channel->channel_name);
3578 len = 4 + name_len + id_len + 4;
3580 silc_buffer_realloc(*channels,
3581 (*channels ? (*channels)->truelen +
3583 silc_buffer_pull_tail(*channels,
3584 ((*channels)->end - (*channels)->data));
3585 silc_buffer_format(*channels,
3586 SILC_STR_UI_SHORT(name_len),
3587 SILC_STR_UI_XNSTRING(channel->channel_name,
3589 SILC_STR_UI_SHORT(id_len),
3590 SILC_STR_UI_XNSTRING(cid, id_len),
3591 SILC_STR_UI_INT(channel->mode),
3593 silc_buffer_pull(*channels, len);
3596 /* Channel user modes */
3597 *channel_users_modes = silc_realloc(*channel_users_modes,
3598 sizeof(**channel_users_modes) *
3600 (*channel_users_modes)[i] = NULL;
3601 *channel_ids = silc_realloc(*channel_ids,
3602 sizeof(**channel_ids) * (i + 1));
3603 (*channel_ids)[i] = NULL;
3604 silc_server_announce_get_channel_users(server, channel,
3606 &(*channel_users_modes)[i]);
3607 (*channel_ids)[i] = channel->id;
3609 /* Channel's topic */
3610 *channel_topics = silc_realloc(*channel_topics,
3611 sizeof(**channel_topics) * (i + 1));
3612 (*channel_topics)[i] = NULL;
3613 silc_server_announce_get_channel_topic(server, channel,
3614 &(*channel_topics)[i]);
3617 if (!silc_idcache_list_next(list, &id_cache))
3621 *channel_users_modes_c += i;
3624 silc_idcache_list_free(list);
3628 /* This function is used to announce our existing channels to our router
3629 when we've connected to it. This also announces the users on the
3630 channels to the router. If the `creation_time' is non-zero only the
3631 channels that was created after the `creation_time' are announced.
3632 Note that the channel users are still announced even if the `creation_time'
3635 void silc_server_announce_channels(SilcServer server,
3636 unsigned long creation_time,
3637 SilcSocketConnection remote)
3639 SilcBuffer channels = NULL, channel_users = NULL;
3640 SilcBuffer *channel_users_modes = NULL;
3641 SilcBuffer *channel_topics = NULL;
3642 SilcUInt32 channel_users_modes_c = 0;
3643 SilcChannelID **channel_ids = NULL;
3645 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3647 /* Get channels and channel users in local list */
3648 silc_server_announce_get_channels(server, server->local_list,
3649 &channels, &channel_users,
3650 &channel_users_modes,
3651 &channel_users_modes_c,
3653 &channel_ids, creation_time);
3655 /* Get channels and channel users in global list */
3656 if (server->server_type != SILC_SERVER)
3657 silc_server_announce_get_channels(server, server->global_list,
3658 &channels, &channel_users,
3659 &channel_users_modes,
3660 &channel_users_modes_c,
3662 &channel_ids, creation_time);
3665 silc_buffer_push(channels, channels->data - channels->head);
3666 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3668 /* Send the packet */
3669 silc_server_packet_send(server, remote,
3670 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3671 channels->data, channels->len,
3674 silc_buffer_free(channels);
3677 if (channel_users) {
3678 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3679 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3680 channel_users->len);
3682 /* Send the packet */
3683 silc_server_packet_send(server, remote,
3684 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3685 channel_users->data, channel_users->len,
3688 silc_buffer_free(channel_users);
3691 if (channel_users_modes) {
3694 for (i = 0; i < channel_users_modes_c; i++) {
3695 if (!channel_users_modes[i])
3697 silc_buffer_push(channel_users_modes[i],
3698 channel_users_modes[i]->data -
3699 channel_users_modes[i]->head);
3700 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3701 channel_users_modes[i]->len);
3702 silc_server_packet_send_dest(server, remote,
3703 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3704 channel_ids[i], SILC_ID_CHANNEL,
3705 channel_users_modes[i]->data,
3706 channel_users_modes[i]->len,
3708 silc_buffer_free(channel_users_modes[i]);
3710 silc_free(channel_users_modes);
3713 if (channel_topics) {
3716 for (i = 0; i < channel_users_modes_c; i++) {
3717 if (!channel_topics[i])
3720 silc_buffer_push(channel_topics[i],
3721 channel_topics[i]->data -
3722 channel_topics[i]->head);
3723 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3724 channel_topics[i]->len);
3725 silc_server_packet_send_dest(server, remote,
3726 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3727 channel_ids[i], SILC_ID_CHANNEL,
3728 channel_topics[i]->data,
3729 channel_topics[i]->len,
3731 silc_buffer_free(channel_topics[i]);
3733 silc_free(channel_topics);
3736 silc_free(channel_ids);
3739 /* Failure timeout callback. If this is called then we will immediately
3740 process the received failure. We always process the failure with timeout
3741 since we do not want to blindly trust to received failure packets.
3742 This won't be called (the timeout is cancelled) if the failure was
3743 bogus (it is bogus if remote does not close the connection after sending
3746 SILC_TASK_CALLBACK(silc_server_failure_callback)
3748 SilcServerFailureContext f = (SilcServerFailureContext)context;
3750 if (f->sock->protocol) {
3751 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3752 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3758 /* Assembles user list and users mode list from the `channel'. */
3760 void silc_server_get_users_on_channel(SilcServer server,
3761 SilcChannelEntry channel,
3762 SilcBuffer *user_list,
3763 SilcBuffer *mode_list,
3764 SilcUInt32 *user_count)
3766 SilcChannelClientEntry chl;
3767 SilcHashTableList htl;
3768 SilcBuffer client_id_list;
3769 SilcBuffer client_mode_list;
3771 SilcUInt32 list_count = 0, len = 0;
3773 silc_hash_table_list(channel->user_list, &htl);
3774 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3775 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3776 silc_hash_table_list_reset(&htl);
3778 client_id_list = silc_buffer_alloc(len);
3780 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3781 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3782 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3784 silc_hash_table_list(channel->user_list, &htl);
3785 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3787 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3788 silc_buffer_put(client_id_list, idp->data, idp->len);
3789 silc_buffer_pull(client_id_list, idp->len);
3790 silc_buffer_free(idp);
3792 /* Client's mode on channel */
3793 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3794 silc_buffer_pull(client_mode_list, 4);
3798 silc_hash_table_list_reset(&htl);
3799 silc_buffer_push(client_id_list,
3800 client_id_list->data - client_id_list->head);
3801 silc_buffer_push(client_mode_list,
3802 client_mode_list->data - client_mode_list->head);
3804 *user_list = client_id_list;
3805 *mode_list = client_mode_list;
3806 *user_count = list_count;
3809 /* Saves users and their modes to the `channel'. */
3811 void silc_server_save_users_on_channel(SilcServer server,
3812 SilcSocketConnection sock,
3813 SilcChannelEntry channel,
3814 SilcClientID *noadd,
3815 SilcBuffer user_list,
3816 SilcBuffer mode_list,
3817 SilcUInt32 user_count)
3822 SilcClientID *client_id;
3823 SilcClientEntry client;
3824 SilcIDCacheEntry cache;
3827 SILC_LOG_DEBUG(("Start"));
3829 for (i = 0; i < user_count; i++) {
3831 SILC_GET16_MSB(idp_len, user_list->data + 2);
3833 client_id = silc_id_payload_parse_id(user_list->data, idp_len, NULL);
3834 silc_buffer_pull(user_list, idp_len);
3839 SILC_GET32_MSB(mode, mode_list->data);
3840 silc_buffer_pull(mode_list, 4);
3842 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3843 silc_free(client_id);
3849 /* Check if we have this client cached already. */
3850 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3851 server->server_type, &cache);
3853 client = silc_idlist_find_client_by_id(server->global_list,
3854 client_id, server->server_type,
3859 /* If router did not find such Client ID in its lists then this must
3860 be bogus client or some router in the net is buggy. */
3861 if (server->server_type == SILC_ROUTER) {
3862 silc_free(client_id);
3866 /* We don't have that client anywhere, add it. The client is added
3867 to global list since server didn't have it in the lists so it must be
3869 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3870 silc_id_dup(client_id, SILC_ID_CLIENT),
3871 sock->user_data, NULL, 0);
3873 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3874 silc_free(client_id);
3878 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3880 /* Found, if it is from global list we'll assure that we won't
3881 expire it now that the entry is on channel. */
3886 silc_free(client_id);
3888 if (!silc_server_client_on_channel(client, channel, NULL)) {
3889 /* Client was not on the channel, add it. */
3890 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3891 chl->client = client;
3893 chl->channel = channel;
3894 silc_hash_table_add(channel->user_list, chl->client, chl);
3895 silc_hash_table_add(client->channels, chl->channel, chl);
3896 channel->user_count++;
3901 /* Lookups route to the client indicated by the `id_data'. The connection
3902 object and internal data object is returned. Returns NULL if route
3903 could not be found to the client. If the `client_id' is specified then
3904 it is used and the `id_data' is ignored. */
3906 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3907 unsigned char *id_data,
3909 SilcClientID *client_id,
3910 SilcIDListData *idata)
3913 SilcClientEntry client;
3915 SILC_LOG_DEBUG(("Start"));
3917 /* Decode destination Client ID */
3919 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3921 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3925 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3928 /* If the destination belongs to our server we don't have to route
3929 the packet anywhere but to send it to the local destination. */
3930 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3934 /* If we are router and the client has router then the client is in
3935 our cell but not directly connected to us. */
3936 if (server->server_type == SILC_ROUTER && client->router) {
3937 /* We are of course in this case the client's router thus the route
3938 to the client is the server who owns the client. So, we will send
3939 the packet to that server. */
3941 *idata = (SilcIDListData)client->router;
3942 return client->router->connection;
3945 /* Seems that client really is directly connected to us */
3947 *idata = (SilcIDListData)client;
3948 return client->connection;
3951 /* Destination belongs to someone not in this server. If we are normal
3952 server our action is to send the packet to our router. */
3953 if (server->server_type != SILC_ROUTER && !server->standalone) {
3956 *idata = (SilcIDListData)server->router;
3957 return server->router->connection;
3960 /* We are router and we will perform route lookup for the destination
3961 and send the packet to fastest route. */
3962 if (server->server_type == SILC_ROUTER && !server->standalone) {
3963 /* Check first that the ID is valid */
3964 client = silc_idlist_find_client_by_id(server->global_list, id,
3967 SilcSocketConnection dst_sock;
3969 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3973 *idata = (SilcIDListData)dst_sock->user_data;
3982 /* Encodes and returns channel list of channels the `client' has joined.
3983 Secret channels are not put to the list. */
3985 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3986 SilcClientEntry client)
3988 SilcBuffer buffer = NULL;
3989 SilcChannelEntry channel;
3990 SilcChannelClientEntry chl;
3991 SilcHashTableList htl;
3994 SilcUInt16 name_len;
3997 silc_hash_table_list(client->channels, &htl);
3998 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3999 channel = chl->channel;
4001 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
4002 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
4005 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4006 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4007 name_len = strlen(channel->channel_name);
4009 len = 4 + name_len + id_len + 4;
4010 buffer = silc_buffer_realloc(buffer,
4011 (buffer ? (buffer)->truelen + len : len));
4012 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
4013 silc_buffer_format(buffer,
4014 SILC_STR_UI_SHORT(name_len),
4015 SILC_STR_UI_XNSTRING(channel->channel_name,
4017 SILC_STR_UI_SHORT(id_len),
4018 SILC_STR_UI_XNSTRING(cid, id_len),
4019 SILC_STR_UI_INT(chl->mode), /* Client's mode */
4021 silc_buffer_pull(buffer, len);
4024 silc_hash_table_list_reset(&htl);
4027 silc_buffer_push(buffer, buffer->data - buffer->head);
4032 /* Finds client entry by Client ID and if it is not found then resolves
4033 it using WHOIS command. */
4035 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4036 SilcClientID *client_id,
4039 SilcClientEntry client;
4044 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4047 client = silc_idlist_find_client_by_id(server->global_list,
4048 client_id, TRUE, NULL);
4049 if (!client && server->server_type == SILC_ROUTER)
4053 if (!client && server->standalone)
4056 if (!client || !client->nickname || !client->username) {
4057 SilcBuffer buffer, idp;
4059 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4060 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4061 client->resolve_cmd_ident = ++server->cmd_ident;
4063 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4064 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4065 server->cmd_ident, 1,
4066 3, idp->data, idp->len);
4067 silc_server_packet_send(server, client ? client->router->connection :
4068 server->router->connection,
4069 SILC_PACKET_COMMAND, 0,
4070 buffer->data, buffer->len, FALSE);
4071 silc_buffer_free(idp);
4072 silc_buffer_free(buffer);
4083 /* A timeout callback for the re-key. We will be the initiator of the
4086 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4088 SilcSocketConnection sock = (SilcSocketConnection)context;
4089 SilcIDListData idata = (SilcIDListData)sock->user_data;
4090 SilcServer server = (SilcServer)idata->rekey->context;
4091 SilcProtocol protocol;
4092 SilcServerRekeyInternalContext *proto_ctx;
4094 SILC_LOG_DEBUG(("Start"));
4096 /* Allocate internal protocol context. This is sent as context
4098 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4099 proto_ctx->server = (void *)server;
4100 proto_ctx->sock = sock;
4101 proto_ctx->responder = FALSE;
4102 proto_ctx->pfs = idata->rekey->pfs;
4104 /* Perform rekey protocol. Will call the final callback after the
4105 protocol is over. */
4106 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4107 &protocol, proto_ctx, silc_server_rekey_final);
4108 sock->protocol = protocol;
4110 /* Run the protocol */
4111 silc_protocol_execute(protocol, server->schedule, 0, 0);
4113 /* Re-register re-key timeout */
4114 silc_schedule_task_add(server->schedule, sock->sock,
4115 silc_server_rekey_callback,
4116 context, idata->rekey->timeout, 0,
4117 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4120 /* The final callback for the REKEY protocol. This will actually take the
4121 new key material into use. */
4123 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4125 SilcProtocol protocol = (SilcProtocol)context;
4126 SilcServerRekeyInternalContext *ctx =
4127 (SilcServerRekeyInternalContext *)protocol->context;
4128 SilcServer server = (SilcServer)ctx->server;
4129 SilcSocketConnection sock = ctx->sock;
4131 SILC_LOG_DEBUG(("Start"));
4133 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4134 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4135 /* Error occured during protocol */
4136 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4137 silc_protocol_cancel(protocol, server->schedule);
4138 silc_protocol_free(protocol);
4139 sock->protocol = NULL;
4141 silc_packet_context_free(ctx->packet);
4143 silc_ske_free(ctx->ske);
4148 /* Purge the outgoing data queue to assure that all rekey packets really
4149 go to the network before we quit the protocol. */
4150 silc_server_packet_queue_purge(server, sock);
4153 silc_protocol_free(protocol);
4154 sock->protocol = NULL;
4156 silc_packet_context_free(ctx->packet);
4158 silc_ske_free(ctx->ske);