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_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 silc_free(server->local_list);
81 silc_free(server->global_list);
83 silc_rng_free(server->rng);
86 silc_pkcs_free(server->pkcs);
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
93 silc_dlist_uninit(server->sim);
96 if (server->pending_commands)
97 silc_dlist_uninit(server->pending_commands);
103 /* Initializes the entire SILC server. This is called always before running
104 the server. This is called only once at the initialization of the program.
105 This binds the server to its listenning port. After this function returns
106 one should call silc_server_run to start the server. This returns TRUE
107 when everything is ok to run the server. Configuration file must be
108 read and parsed before calling this. */
110 int silc_server_init(SilcServer server)
114 SilcServerEntry id_entry;
115 SilcIDListPurge purge;
117 SILC_LOG_DEBUG(("Initializing server"));
119 assert(server->config);
121 /* Set public and private keys */
122 if (!server->config->server_info ||
123 !server->config->server_info->public_key ||
124 !server->config->server_info->private_key) {
125 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
128 server->public_key = server->config->server_info->public_key;
129 server->private_key = server->config->server_info->private_key;
131 /* Set default to configuration parameters */
132 silc_server_config_set_defaults(server);
134 /* Register all configured ciphers, PKCS and hash functions. */
135 if (!silc_server_config_register_ciphers(server))
136 silc_cipher_register_default();
137 if (!silc_server_config_register_pkcs(server))
138 silc_pkcs_register_default();
139 if (!silc_server_config_register_hashfuncs(server))
140 silc_hash_register_default();
141 if (!silc_server_config_register_hmacs(server))
142 silc_hmac_register_default();
144 /* Initialize random number generator for the server. */
145 server->rng = silc_rng_alloc();
146 silc_rng_init(server->rng);
147 silc_rng_global_init(server->rng);
149 /* Initialize hash functions for server to use */
150 silc_hash_alloc("md5", &server->md5hash);
151 silc_hash_alloc("sha1", &server->sha1hash);
153 /* Allocate PKCS context for local public and private keys */
154 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
155 silc_pkcs_public_key_set(server->pkcs, server->public_key);
156 silc_pkcs_private_key_set(server->pkcs, server->private_key);
158 /* Create a listening server */
159 sock = silc_net_create_server(server->config->server_info->port,
160 server->config->server_info->server_ip);
162 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
163 server->config->server_info->server_ip,
164 server->config->server_info->port));
168 /* Initialize ID caches */
169 server->local_list->clients =
170 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
171 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
172 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
174 /* These are allocated for normal server as well as these hold some
175 global information that the server has fetched from its router. For
176 router these are used as they are supposed to be used on router. */
177 server->global_list->clients =
178 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
179 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
180 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
182 /* Allocate the entire socket list that is used in server. Eventually
183 all connections will have entry in this table (it is a table of
184 pointers to the actual object that is allocated individually
186 server->sockets = silc_calloc(server->config->param.connections_max,
187 sizeof(*server->sockets));
190 SilcSocketConnection newsocket = NULL;
192 /* Set socket to non-blocking mode */
193 silc_net_set_socket_nonblock(sock);
196 /* Add ourselves also to the socket table. The entry allocated above
197 is sent as argument for fast referencing in the future. */
198 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
199 server->sockets[sock] = newsocket;
201 /* Perform name and address lookups to resolve the listenning address
203 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
205 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
207 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
208 newsocket->hostname ? newsocket->hostname :
209 newsocket->ip ? newsocket->ip : ""));
210 server->stat.conn_failures++;
213 if (!newsocket->hostname)
214 newsocket->hostname = strdup(newsocket->ip);
216 newsocket->port = silc_net_get_local_port(sock);
218 /* Create a Server ID for the server. */
219 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
224 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
225 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
226 server->id_type = SILC_ID_SERVER;
227 server->server_name = server->config->server_info->server_name;
229 /* Add ourselves to the server list. We don't have a router yet
230 beacuse we haven't established a route yet. It will be done later.
231 For now, NULL is sent as router. This allocates new entry to
234 silc_idlist_add_server(server->local_list,
235 server->config->server_info->server_name,
236 server->server_type, server->id, NULL, NULL);
238 SILC_LOG_ERROR(("Could not add ourselves to cache"));
241 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
243 /* Put the allocated socket pointer also to the entry allocated above
244 for fast back-referencing to the socket list. */
245 newsocket->user_data = (void *)id_entry;
246 id_entry->connection = (void *)newsocket;
247 server->id_entry = id_entry;
250 /* Register protocols */
251 silc_server_protocols_register();
253 /* Initialize the scheduler. */
254 server->schedule = silc_schedule_init(server->config->param.connections_max);
255 if (!server->schedule)
258 /* Add the first task to the scheduler. This is task that is executed by
259 timeout. It expires as soon as the caller calls silc_server_run. This
260 task performs authentication protocol and key exchange with our
262 silc_schedule_task_add(server->schedule, sock,
263 silc_server_connect_to_router,
264 (void *)server, 0, 1,
266 SILC_TASK_PRI_NORMAL);
268 /* Add listener task to the scheduler. This task receives new connections
269 to the server. This task remains on the queue until the end of the
271 silc_schedule_task_add(server->schedule, sock,
272 silc_server_accept_new_connection,
273 (void *)server, 0, 0,
275 SILC_TASK_PRI_NORMAL);
276 server->listenning = TRUE;
278 /* Send log file configuration */
279 silc_server_config_setlogfiles(server);
281 /* If server connections has been configured then we must be router as
282 normal server cannot have server connections, only router connections. */
283 if (server->config->servers) {
284 SilcServerConfigServer *ptr = server->config->servers;
286 server->server_type = SILC_ROUTER;
288 if (ptr->backup_router) {
289 server->server_type = SILC_BACKUP_ROUTER;
290 server->backup_router = TRUE;
291 server->id_entry->server_type = SILC_BACKUP_ROUTER;
298 /* Register the ID Cache purge task. This periodically purges the ID cache
299 and removes the expired cache entries. */
301 /* Clients local list */
302 purge = silc_calloc(1, sizeof(*purge));
303 purge->cache = server->local_list->clients;
304 purge->schedule = server->schedule;
305 purge->timeout = 600;
306 silc_schedule_task_add(purge->schedule, 0,
308 (void *)purge, purge->timeout, 0,
309 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
311 /* Clients global list */
312 purge = silc_calloc(1, sizeof(*purge));
313 purge->cache = server->global_list->clients;
314 purge->schedule = server->schedule;
315 purge->timeout = 300;
316 silc_schedule_task_add(purge->schedule, 0,
318 (void *)purge, purge->timeout, 0,
319 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
321 SILC_LOG_DEBUG(("Server initialized"));
323 /* We are done here, return succesfully */
327 silc_net_close_server(sock);
331 /* Fork server to background */
333 void silc_server_daemonise(SilcServer server)
337 SILC_LOG_DEBUG(("Forking SILC server to background"));
342 SILC_LOG_DEBUG(("fork() failed, cannot proceed"));
347 SILC_LOG_DEBUG(("Server started as user"));
349 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
355 /* Drop root privligies. If this cannot be done, die. */
357 void silc_server_drop(SilcServer server)
359 /* Are we executing silcd as root or a regular user? */
365 /* Get the values given for user and group in configuration file */
366 user = server->config->server_info->user;
367 group = server->config->server_info->group;
369 if (!user || !group) {
370 fprintf(stderr, "Error:" /* XXX update this error message */
371 "\tSILC server must not be run as root. For the security of your\n"
372 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
373 "\tuser account. Modify the [Identity] configuration section to run\n"
374 "\tthe server as non-root user.\n");
378 /* Check whether the user/group does not begin with a number */
379 if (isdigit(user[0]) || isdigit(group[0])) {
380 SILC_LOG_DEBUG(("User and/or group starts with a number"));
381 fprintf(stderr, "Invalid user and/or group information\n");
382 fprintf(stderr, "Please assign them as names, not numbers\n");
386 if (!(pw = getpwnam(user))) {
387 fprintf(stderr, "Error: No such user %s found.\n", user);
390 if (!(gr = getgrnam(group))) {
391 fprintf(stderr, "Error: No such group %s found.\n", group);
395 /* Check whether user and/or group is set to root. If yes, exit
396 immediately. Otherwise, setgid and setuid server to user.group */
397 if ((gr->gr_gid == 0) || (pw->pw_uid == 0)) {
398 fprintf(stderr, "Error:"
399 "\tSILC server must not be run as root. For the security of your\n"
400 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
401 "\tuser account. Modify the [Identity] configuration section to run\n"
402 "\tthe server as non-root user.\n");
406 SILC_LOG_DEBUG(("Changing to group %s (gid=%u)", group, gr->gr_gid));
407 if (setgid(gr->gr_gid) != 0) {
408 fprintf(stderr, "Error: Failed setgid() to %s (gid=%u). Exiting.\n",
412 #if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
413 SILC_LOG_DEBUG(("Removing supplementary groups"));
414 if (setgroups(0, NULL) != 0) {
415 fprintf(stderr, "Error: Failed setgroups() to NULL. Exiting.\n");
418 SILC_LOG_DEBUG(("Setting supplementary groups for user %s", user));
419 if (initgroups(user, gr->gr_gid) != 0) {
420 fprintf(stderr, "Error: Failed initgroups() for user %s (gid=%u). "
421 "Exiting.\n", user, gr->gr_gid);
425 SILC_LOG_DEBUG(("Changing to user %s (uid=%u)", user, pw->pw_uid));
426 if (setuid(pw->pw_uid) != 0) {
427 fprintf(stderr, "Error: Failed to setuid() to %s (gid=%u). Exiting.\n",
434 /* The heart of the server. This runs the scheduler thus runs the server.
435 When this returns the server has been stopped and the program will
438 void silc_server_run(SilcServer server)
440 SILC_LOG_DEBUG(("Running server"));
442 SILC_LOG_INFO(("SILC Server started"));
444 /* Start the scheduler, the heart of the SILC server. When this returns
445 the program will be terminated. */
446 silc_schedule(server->schedule);
449 /* Stops the SILC server. This function is used to shutdown the server.
450 This is usually called after the scheduler has returned. After stopping
451 the server one should call silc_server_free. */
453 void silc_server_stop(SilcServer server)
455 SILC_LOG_DEBUG(("Stopping server"));
457 if (server->schedule) {
458 silc_schedule_stop(server->schedule);
459 silc_schedule_uninit(server->schedule);
460 server->schedule = NULL;
463 silc_server_protocols_unregister();
465 SILC_LOG_DEBUG(("Server stopped"));
468 /* Function that is called when the network connection to a router has
469 been established. This will continue with the key exchange protocol
470 with the remote router. */
472 void silc_server_start_key_exchange(SilcServer server,
473 SilcServerConnection sconn,
476 SilcSocketConnection newsocket;
477 SilcProtocol protocol;
478 SilcServerKEInternalContext *proto_ctx;
479 SilcServerConfigRouter *conn = sconn->conn;
482 /* Cancel any possible retry timeouts */
483 silc_schedule_task_del_by_callback(server->schedule,
484 silc_server_connect_router);
486 /* Set socket options */
487 silc_net_set_socket_nonblock(sock);
488 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
490 /* Create socket connection for the connection. Even though we
491 know that we are connecting to a router we will mark the socket
492 to be unknown connection until we have executed authentication
494 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
495 server->sockets[sock] = newsocket;
496 newsocket->hostname = strdup(sconn->remote_host);
497 newsocket->ip = strdup(sconn->remote_host);
498 newsocket->port = sconn->remote_port;
499 sconn->sock = newsocket;
501 /* Allocate internal protocol context. This is sent as context
503 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
504 proto_ctx->server = (void *)server;
505 proto_ctx->context = (void *)sconn;
506 proto_ctx->sock = newsocket;
507 proto_ctx->rng = server->rng;
508 proto_ctx->responder = FALSE;
510 /* Set Key Exchange flags from configuration, but fall back to global
512 SILC_GET_SKE_FLAGS(conn, proto_ctx);
513 if (server->config->param.key_exchange_pfs)
514 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
516 /* Perform key exchange protocol. silc_server_connect_to_router_second
517 will be called after the protocol is finished. */
518 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
519 &protocol, proto_ctx,
520 silc_server_connect_to_router_second);
521 newsocket->protocol = protocol;
523 /* Register a timeout task that will be executed if the protocol
524 is not executed within set limit. */
525 proto_ctx->timeout_task =
526 silc_schedule_task_add(server->schedule, sock,
527 silc_server_timeout_remote,
528 server, server->config->key_exchange_timeout, 0,
532 /* Register the connection for network input and output. This sets
533 that scheduler will listen for incoming packets for this connection
534 and sets that outgoing packets may be sent to this connection as
535 well. However, this doesn't set the scheduler for outgoing traffic,
536 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
537 later when outgoing data is available. */
538 context = (void *)server;
539 SILC_REGISTER_CONNECTION_FOR_IO(sock);
541 /* Run the protocol */
542 silc_protocol_execute(protocol, server->schedule, 0, 0);
545 /* Timeout callback that will be called to retry connecting to remote
546 router. This is used by both normal and router server. This will wait
547 before retrying the connecting. The timeout is generated by exponential
548 backoff algorithm. */
550 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
552 SilcServerConnection sconn = (SilcServerConnection)context;
553 SilcServer server = sconn->server;
554 SilcServerConfigConnParams *param =
555 (sconn->param ? sconn->param : &server->config->param);
557 SILC_LOG_INFO(("Retrying connecting to a router"));
559 /* Calculate next timeout */
560 if (sconn->retry_count >= 1) {
561 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
562 if (sconn->retry_timeout > param->reconnect_interval_max)
563 sconn->retry_timeout = param->reconnect_interval_max;
565 sconn->retry_timeout = param->reconnect_interval;
567 sconn->retry_count++;
568 sconn->retry_timeout = sconn->retry_timeout +
569 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
571 /* If we've reached max retry count, give up. */
572 if (sconn->retry_count > param->reconnect_count &&
573 param->reconnect_keep_trying == FALSE) {
574 SILC_LOG_ERROR(("Could not connect to router, giving up"));
575 silc_free(sconn->remote_host);
580 /* Wait one before retrying */
581 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
582 context, sconn->retry_timeout, 0,
583 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
586 /* Generic routine to use connect to a router. */
588 SILC_TASK_CALLBACK(silc_server_connect_router)
590 SilcServerConnection sconn = (SilcServerConnection)context;
591 SilcServer server = sconn->server;
594 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
595 (sconn->backup ? "backup router" : "router"),
596 sconn->remote_host, sconn->remote_port));
598 server->router_connect = time(NULL);
600 /* Connect to remote host */
601 sock = silc_net_create_connection(server->config->server_info->server_ip,
605 SILC_LOG_ERROR(("Could not connect to router %s:%d",
606 sconn->remote_host, sconn->remote_port));
607 if (!sconn->no_reconnect)
608 silc_schedule_task_add(server->schedule, fd,
609 silc_server_connect_to_router_retry,
610 context, 0, 1, SILC_TASK_TIMEOUT,
611 SILC_TASK_PRI_NORMAL);
615 /* Continue with key exchange protocol */
616 silc_server_start_key_exchange(server, sconn, sock);
619 /* This function connects to our primary router or if we are a router this
620 establishes all our primary routes. This is called at the start of the
621 server to do authentication and key exchange with our router - called
624 SILC_TASK_CALLBACK(silc_server_connect_to_router)
626 SilcServer server = (SilcServer)context;
627 SilcServerConnection sconn;
628 SilcServerConfigRouter *ptr;
630 SILC_LOG_DEBUG(("Connecting to router(s)"));
632 if (server->server_type == SILC_SERVER) {
633 SILC_LOG_DEBUG(("We are normal server"));
634 } else if (server->server_type == SILC_ROUTER) {
635 SILC_LOG_DEBUG(("We are router"));
637 SILC_LOG_DEBUG(("We are backup router/normal server"));
640 /* Create the connections to all our routes */
641 ptr = server->config->routers;
644 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
645 ptr->backup_router ? "Backup router" : "Router",
646 ptr->initiator ? "Initiator" : "Responder",
647 ptr->host, ptr->port));
649 if (ptr->initiator) {
650 /* Allocate connection object for hold connection specific stuff. */
651 sconn = silc_calloc(1, sizeof(*sconn));
652 sconn->server = server;
653 sconn->remote_host = strdup(ptr->host);
654 sconn->remote_port = ptr->port;
655 sconn->backup = ptr->backup_router;
657 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
658 sconn->backup_replace_port = ptr->backup_replace_port;
661 if (!server->router_conn && !sconn->backup)
662 server->router_conn = sconn;
665 sconn->param = ptr->param;
667 silc_schedule_task_add(server->schedule, fd,
668 silc_server_connect_router,
669 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
670 SILC_TASK_PRI_NORMAL);
679 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
681 /* There wasn't a configured router, we will continue but we don't
682 have a connection to outside world. We will be standalone server. */
683 server->standalone = TRUE;
686 /* Second part of connecting to router(s). Key exchange protocol has been
687 executed and now we will execute authentication protocol. */
689 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
691 SilcProtocol protocol = (SilcProtocol)context;
692 SilcServerKEInternalContext *ctx =
693 (SilcServerKEInternalContext *)protocol->context;
694 SilcServer server = (SilcServer)ctx->server;
695 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
696 SilcSocketConnection sock = ctx->sock;
697 SilcServerConnAuthInternalContext *proto_ctx;
698 SilcServerConfigRouter *conn = NULL;
700 SILC_LOG_DEBUG(("Start"));
702 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
703 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
704 /* Error occured during protocol */
705 silc_protocol_free(protocol);
706 sock->protocol = NULL;
707 silc_ske_free_key_material(ctx->keymat);
709 silc_packet_context_free(ctx->packet);
711 silc_ske_free(ctx->ske);
712 silc_free(ctx->dest_id);
714 silc_schedule_task_del_by_callback(server->schedule,
715 silc_server_failure_callback);
716 silc_server_disconnect_remote(server, sock, "Server closed connection: "
717 "Key exchange failed");
721 /* We now have the key material as the result of the key exchange
722 protocol. Take the key material into use. Free the raw key material
723 as soon as we've set them into use. */
724 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
725 ctx->sock, ctx->keymat,
726 ctx->ske->prop->cipher,
727 ctx->ske->prop->pkcs,
728 ctx->ske->prop->hash,
729 ctx->ske->prop->hmac,
730 ctx->ske->prop->group,
732 silc_protocol_free(protocol);
733 sock->protocol = NULL;
734 silc_ske_free_key_material(ctx->keymat);
736 silc_packet_context_free(ctx->packet);
738 silc_ske_free(ctx->ske);
739 silc_free(ctx->dest_id);
741 silc_schedule_task_del_by_callback(server->schedule,
742 silc_server_failure_callback);
743 silc_server_disconnect_remote(server, sock, "Server closed connection: "
744 "Key exchange failed");
747 silc_ske_free_key_material(ctx->keymat);
749 /* Allocate internal context for the authentication protocol. This
750 is sent as context for the protocol. */
751 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
752 proto_ctx->server = (void *)server;
753 proto_ctx->context = (void *)sconn;
754 proto_ctx->sock = sock;
755 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
756 proto_ctx->dest_id_type = ctx->dest_id_type;
757 proto_ctx->dest_id = ctx->dest_id;
759 /* Resolve the authentication method used in this connection. Check if
760 we find a match from user configured connections */
762 conn = silc_server_config_find_router_conn(server, sock->hostname,
768 /* Match found. Use the configured authentication method. Take only
769 the passphrase, since for public key auth we automatically use
770 our local key pair. */
771 if (conn->passphrase) {
772 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
773 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
775 proto_ctx->auth_data = strdup(conn->passphrase);
776 proto_ctx->auth_data_len = strlen(conn->passphrase);
777 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
779 } else if (conn->publickeys) {
780 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
782 proto_ctx->auth_meth = SILC_AUTH_NONE;
785 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
786 sock->hostname, sock->ip, sock->port));
787 silc_protocol_free(protocol);
788 sock->protocol = NULL;
790 silc_packet_context_free(ctx->packet);
792 silc_ske_free(ctx->ske);
793 silc_free(ctx->dest_id);
795 silc_schedule_task_del_by_callback(server->schedule,
796 silc_server_failure_callback);
797 silc_server_disconnect_remote(server, sock, "Server closed connection: "
798 "Key exchange failed");
802 /* Free old protocol as it is finished now */
803 silc_protocol_free(protocol);
805 silc_packet_context_free(ctx->packet);
807 sock->protocol = NULL;
809 /* Allocate the authentication protocol. This is allocated here
810 but we won't start it yet. We will be receiving party of this
811 protocol thus we will wait that connecting party will make
813 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
814 &sock->protocol, proto_ctx,
815 silc_server_connect_to_router_final);
817 /* Register timeout task. If the protocol is not executed inside
818 this timelimit the connection will be terminated. */
819 proto_ctx->timeout_task =
820 silc_schedule_task_add(server->schedule, sock->sock,
821 silc_server_timeout_remote,
823 server->config->conn_auth_timeout, 0,
827 /* Run the protocol */
828 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
831 /* Finalizes the connection to router. Registers a server task to the
832 queue so that we can accept new connections. */
834 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
836 SilcProtocol protocol = (SilcProtocol)context;
837 SilcServerConnAuthInternalContext *ctx =
838 (SilcServerConnAuthInternalContext *)protocol->context;
839 SilcServer server = (SilcServer)ctx->server;
840 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
841 SilcSocketConnection sock = ctx->sock;
842 SilcServerEntry id_entry;
844 SilcServerHBContext hb_context;
845 unsigned char *id_string;
847 SilcIDListData idata;
848 SilcServerConfigConnParams *param;
850 SILC_LOG_DEBUG(("Start"));
852 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
853 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
854 /* Error occured during protocol */
855 silc_free(ctx->dest_id);
856 silc_server_disconnect_remote(server, sock, "Server closed connection: "
857 "Authentication failed");
861 /* Add a task to the queue. This task receives new connections to the
862 server. This task remains on the queue until the end of the program. */
863 if (!server->listenning && !sconn->backup) {
864 silc_schedule_task_add(server->schedule, server->sock,
865 silc_server_accept_new_connection,
866 (void *)server, 0, 0,
868 SILC_TASK_PRI_NORMAL);
869 server->listenning = TRUE;
872 /* Send NEW_SERVER packet to the router. We will become registered
873 to the SILC network after sending this packet. */
874 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
875 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
876 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
877 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
878 silc_buffer_format(packet,
879 SILC_STR_UI_SHORT(id_len),
880 SILC_STR_UI_XNSTRING(id_string, id_len),
881 SILC_STR_UI_SHORT(strlen(server->server_name)),
882 SILC_STR_UI_XNSTRING(server->server_name,
883 strlen(server->server_name)),
886 /* Send the packet */
887 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
888 packet->data, packet->len, TRUE);
889 silc_buffer_free(packet);
890 silc_free(id_string);
892 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
894 /* Check that we do not have this ID already */
895 id_entry = silc_idlist_find_server_by_id(server->local_list,
896 ctx->dest_id, TRUE, NULL);
898 silc_idcache_del_by_context(server->local_list->servers, id_entry);
900 id_entry = silc_idlist_find_server_by_id(server->global_list,
901 ctx->dest_id, TRUE, NULL);
903 silc_idcache_del_by_context(server->global_list->servers, id_entry);
906 SILC_LOG_DEBUG(("New server id(%s)",
907 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
909 /* Add the connected router to global server list */
910 id_entry = silc_idlist_add_server(server->global_list,
911 strdup(sock->hostname),
912 SILC_ROUTER, ctx->dest_id, NULL, sock);
914 silc_free(ctx->dest_id);
915 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
916 silc_server_disconnect_remote(server, sock, "Server closed connection: "
917 "Authentication failed");
921 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
922 silc_free(sock->user_data);
923 sock->user_data = (void *)id_entry;
924 sock->type = SILC_SOCKET_TYPE_ROUTER;
925 idata = (SilcIDListData)sock->user_data;
926 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
928 param = (sconn->param ? sconn->param : &server->config->param);
930 /* Perform keepalive. The `hb_context' will be freed automatically
931 when finally calling the silc_socket_free function. */
932 hb_context = silc_calloc(1, sizeof(*hb_context));
933 hb_context->server = server;
934 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
935 silc_server_perform_heartbeat,
938 /* Register re-key timeout */
939 idata->rekey->timeout = param->key_exchange_rekey;
940 idata->rekey->context = (void *)server;
941 silc_schedule_task_add(server->schedule, sock->sock,
942 silc_server_rekey_callback,
943 (void *)sock, idata->rekey->timeout, 0,
944 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
946 if (!sconn->backup) {
947 /* Mark this router our primary router if we're still standalone */
948 if (server->standalone) {
949 server->id_entry->router = id_entry;
950 server->router = id_entry;
951 server->standalone = FALSE;
953 /* If we are router then announce our possible servers. */
954 if (server->server_type == SILC_ROUTER)
955 silc_server_announce_servers(server, FALSE, 0,
956 server->router->connection);
958 /* Announce our clients and channels to the router */
959 silc_server_announce_clients(server, 0, server->router->connection);
960 silc_server_announce_channels(server, 0, server->router->connection);
963 /* Add this server to be our backup router */
964 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
965 sconn->backup_replace_port, FALSE);
968 sock->protocol = NULL;
970 /* Call the completion callback to indicate that we've connected to
973 (*sconn->callback)(server, id_entry, sconn->callback_context);
976 /* Free the temporary connection data context */
978 silc_free(sconn->remote_host);
979 silc_free(sconn->backup_replace_ip);
982 if (sconn == server->router_conn)
983 server->router_conn = NULL;
985 /* Free the protocol object */
986 if (sock->protocol == protocol)
987 sock->protocol = NULL;
988 silc_protocol_free(protocol);
990 silc_packet_context_free(ctx->packet);
992 silc_ske_free(ctx->ske);
993 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
994 silc_free(ctx->auth_data);
998 /* Host lookup callbcak that is called after the incoming connection's
999 IP and FQDN lookup is performed. This will actually check the acceptance
1000 of the incoming connection and will register the key exchange protocol
1001 for this connection. */
1004 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1007 SilcServer server = (SilcServer)context;
1008 SilcServerKEInternalContext *proto_ctx;
1009 SilcServerConfigClient *cconfig = NULL;
1010 SilcServerConfigServer *sconfig = NULL;
1011 SilcServerConfigRouter *rconfig = NULL;
1012 SilcServerConfigDeny *deny;
1015 SILC_LOG_DEBUG(("Start"));
1017 /* Check whether we could resolve both IP and FQDN. */
1018 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1019 server->config->require_reverse_lookup)) {
1020 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1021 sock->hostname ? sock->hostname :
1022 sock->ip ? sock->ip : ""));
1023 server->stat.conn_failures++;
1024 silc_server_disconnect_remote(server, sock,
1025 "Server closed connection: Unknown host");
1029 /* Register the connection for network input and output. This sets
1030 that scheduler will listen for incoming packets for this connection
1031 and sets that outgoing packets may be sent to this connection as well.
1032 However, this doesn't set the scheduler for outgoing traffic, it
1033 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1034 later when outgoing data is available. */
1035 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1037 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1040 port = server->sockets[server->sock]->port; /* Listenning port */
1042 /* Check whether this connection is denied to connect to us. */
1043 deny = silc_server_config_find_denied(server, sock->ip);
1045 deny = silc_server_config_find_denied(server, sock->hostname);
1047 /* The connection is denied */
1048 SILC_LOG_INFO(("Connection %s (%s) is denied",
1049 sock->hostname, sock->ip));
1050 silc_server_disconnect_remote(server, sock, deny->reason ?
1052 "Server closed connection: "
1053 "Connection refused");
1054 server->stat.conn_failures++;
1058 /* Check whether we have configred this sort of connection at all. We
1059 have to check all configurations since we don't know what type of
1060 connection this is. */
1061 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1062 cconfig = silc_server_config_find_client(server, sock->hostname);
1063 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1064 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1065 if (server->server_type == SILC_ROUTER) {
1066 if (!(rconfig = silc_server_config_find_router_conn(server,
1068 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1071 if (!cconfig && !sconfig && !rconfig) {
1072 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1074 silc_server_disconnect_remote(server, sock,
1075 "Server closed connection: "
1076 "Connection refused");
1077 server->stat.conn_failures++;
1081 /* The connection is allowed */
1083 /* Allocate internal context for key exchange protocol. This is
1084 sent as context for the protocol. */
1085 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1086 proto_ctx->server = context;
1087 proto_ctx->sock = sock;
1088 proto_ctx->rng = server->rng;
1089 proto_ctx->responder = TRUE;
1090 proto_ctx->cconfig = cconfig;
1091 proto_ctx->sconfig = sconfig;
1092 proto_ctx->rconfig = rconfig;
1094 /* Take flags for key exchange. Since we do not know what type of connection
1095 this is, we go through all found configuratios and use the global ones
1096 as well. This will result always into strictest key exchange flags. */
1097 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1098 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1099 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1100 if (server->config->param.key_exchange_pfs)
1101 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1103 /* Prepare the connection for key exchange protocol. We allocate the
1104 protocol but will not start it yet. The connector will be the
1105 initiator of the protocol thus we will wait for initiation from
1106 there before we start the protocol. */
1107 server->stat.auth_attempts++;
1108 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1109 &sock->protocol, proto_ctx,
1110 silc_server_accept_new_connection_second);
1112 /* Register a timeout task that will be executed if the connector
1113 will not start the key exchange protocol within specified timeout
1114 and the connection will be closed. */
1115 proto_ctx->timeout_task =
1116 silc_schedule_task_add(server->schedule, sock->sock,
1117 silc_server_timeout_remote,
1118 context, server->config->key_exchange_timeout, 0,
1123 /* Accepts new connections to the server. Accepting new connections are
1124 done in three parts to make it async. */
1126 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1128 SilcServer server = (SilcServer)context;
1129 SilcSocketConnection newsocket;
1132 SILC_LOG_DEBUG(("Accepting new connection"));
1134 server->stat.conn_attempts++;
1136 sock = silc_net_accept_connection(server->sock);
1138 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1139 server->stat.conn_failures++;
1143 /* Check for maximum allowed connections */
1144 if (sock > server->config->param.connections_max) {
1145 SILC_LOG_ERROR(("Refusing connection, server is full, try again later"));
1146 server->stat.conn_failures++;
1150 /* Set socket options */
1151 silc_net_set_socket_nonblock(sock);
1152 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1154 /* We don't create a ID yet, since we don't know what type of connection
1155 this is yet. But, we do add the connection to the socket table. */
1156 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1157 server->sockets[sock] = newsocket;
1159 /* Perform asynchronous host lookup. This will lookup the IP and the
1160 FQDN of the remote connection. After the lookup is done the connection
1161 is accepted further. */
1162 silc_socket_host_lookup(newsocket, TRUE,
1163 silc_server_accept_new_connection_lookup, context,
1167 /* Second part of accepting new connection. Key exchange protocol has been
1168 performed and now it is time to do little connection authentication
1169 protocol to figure out whether this connection is client or server
1170 and whether it has right to access this server (especially server
1171 connections needs to be authenticated). */
1173 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1175 SilcProtocol protocol = (SilcProtocol)context;
1176 SilcServerKEInternalContext *ctx =
1177 (SilcServerKEInternalContext *)protocol->context;
1178 SilcServer server = (SilcServer)ctx->server;
1179 SilcSocketConnection sock = ctx->sock;
1180 SilcServerConnAuthInternalContext *proto_ctx;
1182 SILC_LOG_DEBUG(("Start"));
1184 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1185 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1186 /* Error occured during protocol */
1187 silc_protocol_free(protocol);
1188 sock->protocol = NULL;
1189 silc_ske_free_key_material(ctx->keymat);
1191 silc_packet_context_free(ctx->packet);
1193 silc_ske_free(ctx->ske);
1194 silc_free(ctx->dest_id);
1196 silc_schedule_task_del_by_callback(server->schedule,
1197 silc_server_failure_callback);
1198 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1199 "Key exchange failed");
1200 server->stat.auth_failures++;
1204 /* We now have the key material as the result of the key exchange
1205 protocol. Take the key material into use. Free the raw key material
1206 as soon as we've set them into use. */
1207 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1208 ctx->sock, ctx->keymat,
1209 ctx->ske->prop->cipher,
1210 ctx->ske->prop->pkcs,
1211 ctx->ske->prop->hash,
1212 ctx->ske->prop->hmac,
1213 ctx->ske->prop->group,
1215 silc_protocol_free(protocol);
1216 sock->protocol = NULL;
1217 silc_ske_free_key_material(ctx->keymat);
1219 silc_packet_context_free(ctx->packet);
1221 silc_ske_free(ctx->ske);
1222 silc_free(ctx->dest_id);
1224 silc_schedule_task_del_by_callback(server->schedule,
1225 silc_server_failure_callback);
1226 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1227 "Key exchange failed");
1228 server->stat.auth_failures++;
1231 silc_ske_free_key_material(ctx->keymat);
1233 /* Allocate internal context for the authentication protocol. This
1234 is sent as context for the protocol. */
1235 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1236 proto_ctx->server = (void *)server;
1237 proto_ctx->sock = sock;
1238 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1239 proto_ctx->responder = TRUE;
1240 proto_ctx->dest_id_type = ctx->dest_id_type;
1241 proto_ctx->dest_id = ctx->dest_id;
1242 proto_ctx->cconfig = ctx->cconfig;
1243 proto_ctx->sconfig = ctx->sconfig;
1244 proto_ctx->rconfig = ctx->rconfig;
1246 /* Free old protocol as it is finished now */
1247 silc_protocol_free(protocol);
1249 silc_packet_context_free(ctx->packet);
1251 sock->protocol = NULL;
1253 /* Allocate the authentication protocol. This is allocated here
1254 but we won't start it yet. We will be receiving party of this
1255 protocol thus we will wait that connecting party will make
1256 their first move. */
1257 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1258 &sock->protocol, proto_ctx,
1259 silc_server_accept_new_connection_final);
1261 /* Register timeout task. If the protocol is not executed inside
1262 this timelimit the connection will be terminated. */
1263 proto_ctx->timeout_task =
1264 silc_schedule_task_add(server->schedule, sock->sock,
1265 silc_server_timeout_remote,
1267 server->config->conn_auth_timeout, 0,
1272 /* Final part of accepting new connection. The connection has now
1273 been authenticated and keys has been exchanged. We also know whether
1274 this is client or server connection. */
1276 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1278 SilcProtocol protocol = (SilcProtocol)context;
1279 SilcServerConnAuthInternalContext *ctx =
1280 (SilcServerConnAuthInternalContext *)protocol->context;
1281 SilcServer server = (SilcServer)ctx->server;
1282 SilcSocketConnection sock = ctx->sock;
1283 SilcServerHBContext hb_context;
1284 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1286 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1288 SILC_LOG_DEBUG(("Start"));
1290 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1291 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1292 /* Error occured during protocol */
1293 silc_protocol_free(protocol);
1294 sock->protocol = NULL;
1296 silc_packet_context_free(ctx->packet);
1298 silc_ske_free(ctx->ske);
1299 silc_free(ctx->dest_id);
1301 silc_schedule_task_del_by_callback(server->schedule,
1302 silc_server_failure_callback);
1303 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1304 "Authentication failed");
1305 server->stat.auth_failures++;
1309 entry->data.last_receive = time(NULL);
1311 switch (ctx->conn_type) {
1312 case SILC_SOCKET_TYPE_CLIENT:
1314 SilcClientEntry client;
1315 SilcServerConfigClient *conn = ctx->cconfig;
1317 /* Verify whether this connection is after all allowed to connect */
1318 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1319 &server->config->param,
1320 conn->param, ctx->ske)) {
1321 server->stat.auth_failures++;
1325 SILC_LOG_DEBUG(("Remote host is client"));
1326 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1329 /* Add the client to the client ID cache. The nickname and Client ID
1330 and other information is created after we have received NEW_CLIENT
1331 packet from client. */
1332 client = silc_idlist_add_client(server->local_list,
1333 NULL, NULL, NULL, NULL, NULL, sock, 0);
1335 SILC_LOG_ERROR(("Could not add new client to cache"));
1336 silc_free(sock->user_data);
1337 silc_server_disconnect_remote(server, sock,
1338 "Server closed connection: "
1339 "Authentication failed");
1340 server->stat.auth_failures++;
1345 server->stat.my_clients++;
1346 server->stat.clients++;
1347 if (server->server_type == SILC_ROUTER)
1348 server->stat.cell_clients++;
1350 /* Get connection parameters */
1352 if (conn->param->keepalive_secs)
1353 hearbeat_timeout = conn->param->keepalive_secs;
1356 id_entry = (void *)client;
1359 case SILC_SOCKET_TYPE_SERVER:
1360 case SILC_SOCKET_TYPE_ROUTER:
1362 SilcServerEntry new_server;
1363 bool initiator = FALSE;
1364 bool backup_local = FALSE;
1365 bool backup_router = FALSE;
1366 char *backup_replace_ip = NULL;
1367 SilcUInt16 backup_replace_port = 0;
1368 SilcServerConfigServer *sconn = ctx->sconfig;
1369 SilcServerConfigRouter *rconn = ctx->rconfig;
1371 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1372 /* Verify whether this connection is after all allowed to connect */
1373 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1374 &server->config->param,
1375 rconn ? rconn->param : NULL,
1377 server->stat.auth_failures++;
1383 if (rconn->param->keepalive_secs)
1384 hearbeat_timeout = rconn->param->keepalive_secs;
1387 initiator = rconn->initiator;
1388 backup_local = rconn->backup_local;
1389 backup_router = rconn->backup_router;
1390 backup_replace_ip = rconn->backup_replace_ip;
1391 backup_replace_port = rconn->backup_replace_port;
1395 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1396 /* Verify whether this connection is after all allowed to connect */
1397 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1398 &server->config->param,
1399 sconn ? sconn->param : NULL,
1401 server->stat.auth_failures++;
1406 if (sconn->param->keepalive_secs)
1407 hearbeat_timeout = sconn->param->keepalive_secs;
1410 backup_router = sconn->backup_router;
1414 SILC_LOG_DEBUG(("Remote host is %s",
1415 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1416 "server" : (backup_router ?
1417 "backup router" : "router")));
1418 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1419 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1420 "server" : (backup_router ?
1421 "backup router" : "router")));
1423 /* Add the server into server cache. The server name and Server ID
1424 is updated after we have received NEW_SERVER packet from the
1425 server. We mark ourselves as router for this server if we really
1428 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1429 server->local_list : (backup_router ?
1430 server->local_list :
1431 server->global_list)),
1433 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1434 SILC_SERVER : SILC_ROUTER),
1436 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1437 server->id_entry : (backup_router ?
1438 server->id_entry : NULL)),
1441 SILC_LOG_ERROR(("Could not add new server to cache"));
1442 silc_free(sock->user_data);
1443 silc_server_disconnect_remote(server, sock,
1444 "Server closed connection: "
1445 "Authentication failed");
1446 server->stat.auth_failures++;
1451 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1452 server->stat.my_servers++;
1454 server->stat.my_routers++;
1455 server->stat.servers++;
1457 id_entry = (void *)new_server;
1459 /* If the incoming connection is router and marked as backup router
1460 then add it to be one of our backups */
1461 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1462 silc_server_backup_add(server, new_server, backup_replace_ip,
1463 backup_replace_port, backup_local);
1465 /* Change it back to SERVER type since that's what it really is. */
1467 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1469 new_server->server_type = SILC_BACKUP_ROUTER;
1472 /* Check whether this connection is to be our primary router connection
1473 if we do not already have the primary route. */
1474 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1475 if (silc_server_config_is_primary_route(server) && !initiator)
1478 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1479 server->standalone = FALSE;
1480 if (!server->id_entry->router) {
1481 server->id_entry->router = id_entry;
1482 server->router = id_entry;
1493 sock->type = ctx->conn_type;
1495 /* Add the common data structure to the ID entry. */
1496 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1498 /* Add to sockets internal pointer for fast referencing */
1499 silc_free(sock->user_data);
1500 sock->user_data = id_entry;
1502 /* Connection has been fully established now. Everything is ok. */
1503 SILC_LOG_DEBUG(("New connection authenticated"));
1505 /* Perform keepalive. The `hb_context' will be freed automatically
1506 when finally calling the silc_socket_free function. */
1507 hb_context = silc_calloc(1, sizeof(*hb_context));
1508 hb_context->server = server;
1509 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1510 silc_server_perform_heartbeat,
1514 silc_schedule_task_del_by_callback(server->schedule,
1515 silc_server_failure_callback);
1516 silc_protocol_free(protocol);
1518 silc_packet_context_free(ctx->packet);
1520 silc_ske_free(ctx->ske);
1521 silc_free(ctx->dest_id);
1523 sock->protocol = NULL;
1526 /* This function is used to read packets from network and send packets to
1527 network. This is usually a generic task. */
1529 SILC_TASK_CALLBACK(silc_server_packet_process)
1531 SilcServer server = (SilcServer)context;
1532 SilcSocketConnection sock = server->sockets[fd];
1533 SilcIDListData idata;
1534 SilcCipher cipher = NULL;
1535 SilcHmac hmac = NULL;
1536 SilcUInt32 sequence = 0;
1542 SILC_LOG_DEBUG(("Processing packet"));
1544 /* Packet sending */
1546 if (type == SILC_TASK_WRITE) {
1547 /* Do not send data to disconnected connection */
1548 if (SILC_IS_DISCONNECTED(sock))
1551 server->stat.packets_sent++;
1553 if (sock->outbuf->data - sock->outbuf->head)
1554 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1556 /* Send the packet */
1557 ret = silc_packet_send(sock, TRUE);
1559 /* If returned -2 could not write to connection now, will do
1565 SILC_LOG_ERROR(("Error sending packet to connection "
1566 "%s:%d [%s]", sock->hostname, sock->port,
1567 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1568 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1569 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1574 /* The packet has been sent and now it is time to set the connection
1575 back to only for input. When there is again some outgoing data
1576 available for this connection it will be set for output as well.
1577 This call clears the output setting and sets it only for input. */
1578 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1579 SILC_UNSET_OUTBUF_PENDING(sock);
1581 silc_buffer_clear(sock->outbuf);
1585 /* Packet receiving */
1587 /* Read some data from connection */
1588 ret = silc_packet_receive(sock);
1592 SILC_LOG_ERROR(("Error receiving packet from connection "
1593 "%s:%d [%s] %s", sock->hostname, sock->port,
1594 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1595 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1596 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1597 "Router"), strerror(errno)));
1603 SILC_LOG_DEBUG(("Read EOF"));
1605 /* If connection is disconnecting already we will finally
1606 close the connection */
1607 if (SILC_IS_DISCONNECTING(sock)) {
1608 if (sock->user_data)
1609 silc_server_free_sock_user_data(server, sock, NULL);
1610 silc_server_close_connection(server, sock);
1614 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1615 SILC_SET_DISCONNECTING(sock);
1617 if (sock->user_data) {
1619 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1620 silc_server_free_sock_user_data(server, sock, tmp);
1622 silc_server_free_sock_user_data(server, sock, NULL);
1623 } else if (server->router_conn && server->router_conn->sock == sock &&
1624 !server->router && server->standalone)
1625 silc_schedule_task_add(server->schedule, 0,
1626 silc_server_connect_to_router,
1629 SILC_TASK_PRI_NORMAL);
1631 silc_server_close_connection(server, sock);
1635 /* If connection is disconnecting or disconnected we will ignore
1637 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1638 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1642 server->stat.packets_received++;
1644 /* Get keys and stuff from ID entry */
1645 idata = (SilcIDListData)sock->user_data;
1647 cipher = idata->receive_key;
1648 hmac = idata->hmac_receive;
1649 sequence = idata->psn_receive;
1652 /* Process the packet. This will call the parser that will then
1653 decrypt and parse the packet. */
1654 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1655 TRUE : FALSE, cipher, hmac, sequence,
1656 silc_server_packet_parse, server);
1658 /* If this socket connection is not authenticated yet and the packet
1659 processing failed we will drop the connection since it can be
1660 a malicious flooder. */
1661 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1662 (!sock->protocol || sock->protocol->protocol->type ==
1663 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1664 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1665 SILC_SET_DISCONNECTING(sock);
1667 if (sock->user_data)
1668 silc_server_free_sock_user_data(server, sock, NULL);
1669 silc_server_close_connection(server, sock);
1673 /* Parses whole packet, received earlier. */
1675 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1677 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1678 SilcServer server = (SilcServer)parse_ctx->context;
1679 SilcSocketConnection sock = parse_ctx->sock;
1680 SilcPacketContext *packet = parse_ctx->packet;
1681 SilcIDListData idata = (SilcIDListData)sock->user_data;
1684 SILC_LOG_DEBUG(("Start"));
1686 /* Parse the packet */
1687 if (parse_ctx->normal)
1688 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1690 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1692 /* If entry is disabled ignore what we got. */
1693 if (ret != SILC_PACKET_RESUME_ROUTER &&
1694 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1695 SILC_LOG_DEBUG(("Connection is disabled"));
1699 if (ret == SILC_PACKET_NONE)
1702 /* Check that the the current client ID is same as in the client's packet. */
1703 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1704 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1705 if (client && client->id) {
1706 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1707 packet->src_id_type);
1708 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1716 if (server->server_type == SILC_ROUTER) {
1717 /* Route the packet if it is not destined to us. Other ID types but
1718 server are handled separately after processing them. */
1719 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1720 packet->dst_id_type == SILC_ID_SERVER &&
1721 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1722 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1724 /* Route the packet to fastest route for the destination ID */
1725 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1726 packet->dst_id_type);
1729 silc_server_packet_route(server,
1730 silc_server_route_get(server, id,
1731 packet->dst_id_type),
1738 /* Parse the incoming packet type */
1739 silc_server_packet_parse_type(server, sock, packet);
1741 if (server->server_type == SILC_ROUTER) {
1742 /* Broadcast packet if it is marked as broadcast packet and it is
1743 originated from router and we are router. */
1744 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1745 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1746 !server->standalone) {
1747 /* Broadcast to our primary route */
1748 silc_server_packet_broadcast(server, server->router->connection, packet);
1750 /* If we have backup routers then we need to feed all broadcast
1751 data to those servers. */
1752 silc_server_backup_broadcast(server, sock, packet);
1757 silc_packet_context_free(packet);
1758 silc_free(parse_ctx);
1761 /* Parser callback called by silc_packet_receive_process. This merely
1762 registers timeout that will handle the actual parsing when appropriate. */
1764 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1767 SilcServer server = (SilcServer)context;
1768 SilcSocketConnection sock = parser_context->sock;
1769 SilcIDListData idata = (SilcIDListData)sock->user_data;
1772 idata->psn_receive = parser_context->packet->sequence + 1;
1774 /* If protocol for this connection is key exchange or rekey then we'll
1775 process all packets synchronously, since there might be packets in
1776 queue that we are not able to decrypt without first processing the
1777 packets before them. */
1778 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1779 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1780 (sock->protocol && sock->protocol->protocol &&
1781 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1782 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1783 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1786 /* Reprocess data since we'll return FALSE here. This is because
1787 the idata->receive_key might have become valid in the last packet
1788 and we want to call this processor with valid cipher. */
1790 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1791 TRUE : FALSE, idata->receive_key,
1792 idata->hmac_receive, idata->psn_receive,
1793 silc_server_packet_parse, server);
1795 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1796 TRUE : FALSE, NULL, NULL, 0,
1797 silc_server_packet_parse, server);
1801 switch (sock->type) {
1802 case SILC_SOCKET_TYPE_UNKNOWN:
1803 case SILC_SOCKET_TYPE_CLIENT:
1804 /* Parse the packet with timeout */
1805 silc_schedule_task_add(server->schedule, sock->sock,
1806 silc_server_packet_parse_real,
1807 (void *)parser_context, 0, 100000,
1809 SILC_TASK_PRI_NORMAL);
1811 case SILC_SOCKET_TYPE_SERVER:
1812 case SILC_SOCKET_TYPE_ROUTER:
1813 /* Packets from servers are parsed immediately */
1814 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1824 /* Parses the packet type and calls what ever routines the packet type
1825 requires. This is done for all incoming packets. */
1827 void silc_server_packet_parse_type(SilcServer server,
1828 SilcSocketConnection sock,
1829 SilcPacketContext *packet)
1831 SilcPacketType type = packet->type;
1832 SilcIDListData idata = (SilcIDListData)sock->user_data;
1834 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1836 /* Parse the packet type */
1838 case SILC_PACKET_DISCONNECT:
1839 SILC_LOG_DEBUG(("Disconnect packet"));
1840 if (packet->flags & SILC_PACKET_FLAG_LIST)
1842 if (silc_string_is_ascii(packet->buffer->data, packet->buffer->len)) {
1843 /* Duplicate to null terminate the string. */
1844 char *message = silc_memdup(packet->buffer->data, packet->buffer->len);
1845 SILC_LOG_ERROR(("%s", message));
1850 case SILC_PACKET_SUCCESS:
1852 * Success received for something. For now we can have only
1853 * one protocol for connection executing at once hence this
1854 * success message is for whatever protocol is executing currently.
1856 SILC_LOG_DEBUG(("Success packet"));
1857 if (packet->flags & SILC_PACKET_FLAG_LIST)
1860 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1863 case SILC_PACKET_FAILURE:
1865 * Failure received for something. For now we can have only
1866 * one protocol for connection executing at once hence this
1867 * failure message is for whatever protocol is executing currently.
1869 SILC_LOG_DEBUG(("Failure packet"));
1870 if (packet->flags & SILC_PACKET_FLAG_LIST)
1872 if (sock->protocol) {
1873 SilcServerFailureContext f;
1874 f = silc_calloc(1, sizeof(*f));
1878 /* We will wait 5 seconds to process this failure packet */
1879 silc_schedule_task_add(server->schedule, sock->sock,
1880 silc_server_failure_callback, (void *)f, 5, 0,
1881 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1885 case SILC_PACKET_REJECT:
1886 SILC_LOG_DEBUG(("Reject packet"));
1887 if (packet->flags & SILC_PACKET_FLAG_LIST)
1892 case SILC_PACKET_NOTIFY:
1894 * Received notify packet. Server can receive notify packets from
1895 * router. Server then relays the notify messages to clients if needed.
1897 SILC_LOG_DEBUG(("Notify packet"));
1898 if (packet->flags & SILC_PACKET_FLAG_LIST)
1899 silc_server_notify_list(server, sock, packet);
1901 silc_server_notify(server, sock, packet);
1907 case SILC_PACKET_CHANNEL_MESSAGE:
1909 * Received channel message. Channel messages are special packets
1910 * (although probably most common ones) thus they are handled
1913 SILC_LOG_DEBUG(("Channel Message packet"));
1914 if (packet->flags & SILC_PACKET_FLAG_LIST)
1916 idata->last_receive = time(NULL);
1917 silc_server_channel_message(server, sock, packet);
1920 case SILC_PACKET_CHANNEL_KEY:
1922 * Received key for channel. As channels are created by the router
1923 * the keys are as well. We will distribute the key to all of our
1924 * locally connected clients on the particular channel. Router
1925 * never receives this channel and thus is ignored.
1927 SILC_LOG_DEBUG(("Channel Key packet"));
1928 if (packet->flags & SILC_PACKET_FLAG_LIST)
1930 silc_server_channel_key(server, sock, packet);
1936 case SILC_PACKET_COMMAND:
1938 * Recived command. Processes the command request and allocates the
1939 * command context and calls the command.
1941 SILC_LOG_DEBUG(("Command packet"));
1942 if (packet->flags & SILC_PACKET_FLAG_LIST)
1944 silc_server_command_process(server, sock, packet);
1947 case SILC_PACKET_COMMAND_REPLY:
1949 * Received command reply packet. Received command reply to command. It
1950 * may be reply to command sent by us or reply to command sent by client
1951 * that we've routed further.
1953 SILC_LOG_DEBUG(("Command Reply packet"));
1954 if (packet->flags & SILC_PACKET_FLAG_LIST)
1956 silc_server_command_reply(server, sock, packet);
1960 * Private Message packets
1962 case SILC_PACKET_PRIVATE_MESSAGE:
1964 * Received private message packet. The packet is coming from either
1967 SILC_LOG_DEBUG(("Private Message packet"));
1968 if (packet->flags & SILC_PACKET_FLAG_LIST)
1970 idata->last_receive = time(NULL);
1971 silc_server_private_message(server, sock, packet);
1974 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1976 * Private message key packet.
1978 if (packet->flags & SILC_PACKET_FLAG_LIST)
1980 silc_server_private_message_key(server, sock, packet);
1984 * Key Exchange protocol packets
1986 case SILC_PACKET_KEY_EXCHANGE:
1987 SILC_LOG_DEBUG(("KE packet"));
1988 if (packet->flags & SILC_PACKET_FLAG_LIST)
1991 if (sock->protocol && sock->protocol->protocol &&
1992 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1994 SilcServerKEInternalContext *proto_ctx =
1995 (SilcServerKEInternalContext *)sock->protocol->context;
1997 proto_ctx->packet = silc_packet_context_dup(packet);
1999 /* Let the protocol handle the packet */
2000 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2002 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2003 "protocol active, packet dropped."));
2007 case SILC_PACKET_KEY_EXCHANGE_1:
2008 SILC_LOG_DEBUG(("KE 1 packet"));
2009 if (packet->flags & SILC_PACKET_FLAG_LIST)
2012 if (sock->protocol && sock->protocol->protocol &&
2013 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2014 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2016 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2017 SilcServerRekeyInternalContext *proto_ctx =
2018 (SilcServerRekeyInternalContext *)sock->protocol->context;
2020 if (proto_ctx->packet)
2021 silc_packet_context_free(proto_ctx->packet);
2023 proto_ctx->packet = silc_packet_context_dup(packet);
2025 /* Let the protocol handle the packet */
2026 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2028 SilcServerKEInternalContext *proto_ctx =
2029 (SilcServerKEInternalContext *)sock->protocol->context;
2031 if (proto_ctx->packet)
2032 silc_packet_context_free(proto_ctx->packet);
2034 proto_ctx->packet = silc_packet_context_dup(packet);
2035 proto_ctx->dest_id_type = packet->src_id_type;
2036 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2037 packet->src_id_type);
2038 if (!proto_ctx->dest_id)
2041 /* Let the protocol handle the packet */
2042 silc_protocol_execute(sock->protocol, server->schedule,
2046 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2047 "protocol active, packet dropped."));
2051 case SILC_PACKET_KEY_EXCHANGE_2:
2052 SILC_LOG_DEBUG(("KE 2 packet"));
2053 if (packet->flags & SILC_PACKET_FLAG_LIST)
2056 if (sock->protocol && sock->protocol->protocol &&
2057 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2058 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2060 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2061 SilcServerRekeyInternalContext *proto_ctx =
2062 (SilcServerRekeyInternalContext *)sock->protocol->context;
2064 if (proto_ctx->packet)
2065 silc_packet_context_free(proto_ctx->packet);
2067 proto_ctx->packet = silc_packet_context_dup(packet);
2069 /* Let the protocol handle the packet */
2070 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2072 SilcServerKEInternalContext *proto_ctx =
2073 (SilcServerKEInternalContext *)sock->protocol->context;
2075 if (proto_ctx->packet)
2076 silc_packet_context_free(proto_ctx->packet);
2078 proto_ctx->packet = silc_packet_context_dup(packet);
2079 proto_ctx->dest_id_type = packet->src_id_type;
2080 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2081 packet->src_id_type);
2082 if (!proto_ctx->dest_id)
2085 /* Let the protocol handle the packet */
2086 silc_protocol_execute(sock->protocol, server->schedule,
2090 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2091 "protocol active, packet dropped."));
2095 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2097 * Connection authentication request packet. When we receive this packet
2098 * we will send to the other end information about our mandatory
2099 * authentication method for the connection. This packet maybe received
2102 SILC_LOG_DEBUG(("Connection authentication request packet"));
2103 if (packet->flags & SILC_PACKET_FLAG_LIST)
2105 silc_server_connection_auth_request(server, sock, packet);
2109 * Connection Authentication protocol packets
2111 case SILC_PACKET_CONNECTION_AUTH:
2112 /* Start of the authentication protocol. We receive here the
2113 authentication data and will verify it. */
2114 SILC_LOG_DEBUG(("Connection auth packet"));
2115 if (packet->flags & SILC_PACKET_FLAG_LIST)
2118 if (sock->protocol && sock->protocol->protocol->type
2119 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2121 SilcServerConnAuthInternalContext *proto_ctx =
2122 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2124 proto_ctx->packet = silc_packet_context_dup(packet);
2126 /* Let the protocol handle the packet */
2127 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2129 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2130 "protocol active, packet dropped."));
2134 case SILC_PACKET_NEW_ID:
2136 * Received New ID packet. This includes some new ID that has been
2137 * created. It may be for client, server or channel. This is the way
2138 * to distribute information about new registered entities in the
2141 SILC_LOG_DEBUG(("New ID packet"));
2142 if (packet->flags & SILC_PACKET_FLAG_LIST)
2143 silc_server_new_id_list(server, sock, packet);
2145 silc_server_new_id(server, sock, packet);
2148 case SILC_PACKET_NEW_CLIENT:
2150 * Received new client packet. This includes client information that
2151 * we will use to create initial client ID. After creating new
2152 * ID we will send it to the client.
2154 SILC_LOG_DEBUG(("New Client packet"));
2155 if (packet->flags & SILC_PACKET_FLAG_LIST)
2157 silc_server_new_client(server, sock, packet);
2160 case SILC_PACKET_NEW_SERVER:
2162 * Received new server packet. This includes Server ID and some other
2163 * information that we may save. This is received after server has
2166 SILC_LOG_DEBUG(("New Server packet"));
2167 if (packet->flags & SILC_PACKET_FLAG_LIST)
2169 silc_server_new_server(server, sock, packet);
2172 case SILC_PACKET_NEW_CHANNEL:
2174 * Received new channel packet. Information about new channel in the
2175 * network are distributed using this packet.
2177 SILC_LOG_DEBUG(("New Channel packet"));
2178 if (packet->flags & SILC_PACKET_FLAG_LIST)
2179 silc_server_new_channel_list(server, sock, packet);
2181 silc_server_new_channel(server, sock, packet);
2184 case SILC_PACKET_HEARTBEAT:
2186 * Received heartbeat.
2188 SILC_LOG_DEBUG(("Heartbeat packet"));
2189 if (packet->flags & SILC_PACKET_FLAG_LIST)
2193 case SILC_PACKET_KEY_AGREEMENT:
2195 * Received heartbeat.
2197 SILC_LOG_DEBUG(("Key agreement packet"));
2198 if (packet->flags & SILC_PACKET_FLAG_LIST)
2200 silc_server_key_agreement(server, sock, packet);
2203 case SILC_PACKET_REKEY:
2205 * Received re-key packet. The sender wants to regenerate the session
2208 SILC_LOG_DEBUG(("Re-key packet"));
2209 if (packet->flags & SILC_PACKET_FLAG_LIST)
2211 silc_server_rekey(server, sock, packet);
2214 case SILC_PACKET_REKEY_DONE:
2216 * The re-key is done.
2218 SILC_LOG_DEBUG(("Re-key done packet"));
2219 if (packet->flags & SILC_PACKET_FLAG_LIST)
2222 if (sock->protocol && sock->protocol->protocol &&
2223 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2225 SilcServerRekeyInternalContext *proto_ctx =
2226 (SilcServerRekeyInternalContext *)sock->protocol->context;
2228 if (proto_ctx->packet)
2229 silc_packet_context_free(proto_ctx->packet);
2231 proto_ctx->packet = silc_packet_context_dup(packet);
2233 /* Let the protocol handle the packet */
2234 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2236 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2237 "protocol active, packet dropped."));
2241 case SILC_PACKET_FTP:
2243 SILC_LOG_DEBUG(("FTP packet"));
2244 if (packet->flags & SILC_PACKET_FLAG_LIST)
2246 silc_server_ftp(server, sock, packet);
2249 case SILC_PACKET_RESUME_ROUTER:
2250 /* Resume router packet received. This packet is received for backup
2251 router resuming protocol. */
2252 SILC_LOG_DEBUG(("Resume router packet"));
2253 if (packet->flags & SILC_PACKET_FLAG_LIST)
2255 silc_server_backup_resume_router(server, sock, packet);
2259 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2265 /* Creates connection to a remote router. */
2267 void silc_server_create_connection(SilcServer server,
2268 const char *remote_host, SilcUInt32 port)
2270 SilcServerConnection sconn;
2272 /* Allocate connection object for hold connection specific stuff. */
2273 sconn = silc_calloc(1, sizeof(*sconn));
2274 sconn->server = server;
2275 sconn->remote_host = strdup(remote_host);
2276 sconn->remote_port = port;
2277 sconn->no_reconnect = TRUE;
2278 sconn->param = &server->config->param;
2280 silc_schedule_task_add(server->schedule, 0,
2281 silc_server_connect_router,
2282 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2283 SILC_TASK_PRI_NORMAL);
2286 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2288 silc_socket_free((SilcSocketConnection)context);
2291 /* Closes connection to socket connection */
2293 void silc_server_close_connection(SilcServer server,
2294 SilcSocketConnection sock)
2296 if (!server->sockets[sock->sock])
2299 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2301 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2302 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2303 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2306 /* We won't listen for this connection anymore */
2307 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2309 /* Unregister all tasks */
2310 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2312 /* Close the actual connection */
2313 silc_net_close_connection(sock->sock);
2314 server->sockets[sock->sock] = NULL;
2316 /* If sock->user_data is NULL then we'll check for active protocols
2317 here since the silc_server_free_sock_user_data has not been called
2318 for this connection. */
2319 if (!sock->user_data) {
2320 /* If any protocol is active cancel its execution. It will call
2321 the final callback which will finalize the disconnection. */
2322 if (sock->protocol) {
2323 silc_protocol_cancel(sock->protocol, server->schedule);
2324 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2325 silc_protocol_execute_final(sock->protocol, server->schedule);
2326 sock->protocol = NULL;
2331 silc_schedule_task_add(server->schedule, 0,
2332 silc_server_close_connection_final,
2333 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2334 SILC_TASK_PRI_NORMAL);
2337 /* Sends disconnect message to remote connection and disconnects the
2340 void silc_server_disconnect_remote(SilcServer server,
2341 SilcSocketConnection sock,
2342 const char *fmt, ...)
2345 unsigned char buf[4096];
2350 memset(buf, 0, sizeof(buf));
2352 vsprintf(buf, fmt, ap);
2355 SILC_LOG_DEBUG(("Disconnecting remote host"));
2357 /* Notify remote end that the conversation is over. The notify message
2358 is tried to be sent immediately. */
2359 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2360 buf, strlen(buf), TRUE);
2362 /* Mark the connection to be disconnected */
2363 SILC_SET_DISCONNECTED(sock);
2364 silc_server_close_connection(server, sock);
2369 SilcClientEntry client;
2370 } *FreeClientInternal;
2372 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2374 FreeClientInternal i = (FreeClientInternal)context;
2376 silc_idlist_del_data(i->client);
2377 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2381 /* Frees client data and notifies about client's signoff. */
2383 void silc_server_free_client_data(SilcServer server,
2384 SilcSocketConnection sock,
2385 SilcClientEntry client,
2387 const char *signoff)
2389 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2391 /* If there is pending outgoing data for the client then purge it
2392 to the network before removing the client entry. */
2393 silc_server_packet_queue_purge(server, sock);
2398 /* Send SIGNOFF notify to routers. */
2399 if (notify && !server->standalone && server->router)
2400 silc_server_send_notify_signoff(server, server->router->connection,
2401 server->server_type == SILC_SERVER ?
2402 FALSE : TRUE, client->id, signoff);
2404 /* Remove client from all channels */
2406 silc_server_remove_from_channels(server, NULL, client,
2407 TRUE, (char *)signoff, TRUE);
2409 silc_server_remove_from_channels(server, NULL, client,
2410 FALSE, NULL, FALSE);
2412 /* Update statistics */
2413 server->stat.my_clients--;
2414 server->stat.clients--;
2415 if (server->server_type == SILC_ROUTER)
2416 server->stat.cell_clients--;
2417 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2418 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2420 /* We will not delete the client entry right away. We will take it
2421 into history (for WHOWAS command) for 5 minutes */
2424 silc_schedule_task_add(server->schedule, 0,
2425 silc_server_free_client_data_timeout,
2427 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2428 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2429 client->router = NULL;
2430 client->connection = NULL;
2434 /* Frees user_data pointer from socket connection object. This also sends
2435 appropriate notify packets to the network to inform about leaving
2438 void silc_server_free_sock_user_data(SilcServer server,
2439 SilcSocketConnection sock,
2440 const char *signoff_message)
2442 SILC_LOG_DEBUG(("Start"));
2444 switch (sock->type) {
2445 case SILC_SOCKET_TYPE_CLIENT:
2447 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2448 silc_server_free_client_data(server, sock, user_data, TRUE,
2452 case SILC_SOCKET_TYPE_SERVER:
2453 case SILC_SOCKET_TYPE_ROUTER:
2455 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2456 SilcServerEntry backup_router = NULL;
2459 backup_router = silc_server_backup_get(server, user_data->id);
2461 /* If this was our primary router connection then we're lost to
2462 the outside world. */
2463 if (server->router == user_data) {
2464 /* Check whether we have a backup router connection */
2465 if (!backup_router || backup_router == user_data) {
2466 silc_schedule_task_add(server->schedule, 0,
2467 silc_server_connect_to_router,
2470 SILC_TASK_PRI_NORMAL);
2472 server->id_entry->router = NULL;
2473 server->router = NULL;
2474 server->standalone = TRUE;
2475 backup_router = NULL;
2477 SILC_LOG_INFO(("New primary router is backup router %s",
2478 backup_router->server_name));
2479 SILC_LOG_DEBUG(("New primary router is backup router %s",
2480 backup_router->server_name));
2481 server->id_entry->router = backup_router;
2482 server->router = backup_router;
2483 server->router_connect = time(0);
2484 server->backup_primary = TRUE;
2485 if (server->server_type == SILC_BACKUP_ROUTER) {
2486 server->server_type = SILC_ROUTER;
2488 /* We'll need to constantly try to reconnect to the primary
2489 router so that we'll see when it comes back online. */
2490 silc_server_backup_reconnect(server, sock->ip, sock->port,
2491 silc_server_backup_connected,
2495 /* Mark this connection as replaced */
2496 silc_server_backup_replaced_add(server, user_data->id,
2499 } else if (backup_router) {
2500 SILC_LOG_INFO(("Enabling the use of backup router %s",
2501 backup_router->server_name));
2502 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2503 backup_router->server_name));
2505 /* Mark this connection as replaced */
2506 silc_server_backup_replaced_add(server, user_data->id,
2510 if (!backup_router) {
2511 /* Free all client entries that this server owns as they will
2512 become invalid now as well. */
2514 silc_server_remove_clients_by_server(server, user_data, TRUE);
2515 if (server->server_type == SILC_SERVER)
2516 silc_server_remove_channels_by_server(server, user_data);
2518 /* Update the client entries of this server to the new backup
2519 router. This also removes the clients that *really* was owned
2520 by the primary router and went down with the router. */
2521 silc_server_update_clients_by_server(server, user_data, backup_router,
2523 silc_server_update_servers_by_server(server, user_data, backup_router);
2524 if (server->server_type == SILC_SERVER)
2525 silc_server_update_channels_by_server(server, user_data,
2529 /* Free the server entry */
2530 silc_server_backup_del(server, user_data);
2531 silc_server_backup_replaced_del(server, user_data);
2532 silc_idlist_del_data(user_data);
2533 if (!silc_idlist_del_server(server->local_list, user_data))
2534 silc_idlist_del_server(server->global_list, user_data);
2535 server->stat.my_servers--;
2536 server->stat.servers--;
2537 if (server->server_type == SILC_ROUTER)
2538 server->stat.cell_servers--;
2540 if (backup_router) {
2541 /* Announce all of our stuff that was created about 5 minutes ago.
2542 The backup router knows all the other stuff already. */
2543 if (server->server_type == SILC_ROUTER)
2544 silc_server_announce_servers(server, FALSE, time(0) - 300,
2545 backup_router->connection);
2547 /* Announce our clients and channels to the router */
2548 silc_server_announce_clients(server, time(0) - 300,
2549 backup_router->connection);
2550 silc_server_announce_channels(server, time(0) - 300,
2551 backup_router->connection);
2557 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2559 silc_idlist_del_data(user_data);
2560 silc_free(user_data);
2565 /* If any protocol is active cancel its execution */
2566 if (sock->protocol) {
2567 silc_protocol_cancel(sock->protocol, server->schedule);
2568 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2569 silc_protocol_execute_final(sock->protocol, server->schedule);
2570 sock->protocol = NULL;
2573 sock->user_data = NULL;
2576 /* Removes client from all channels it has joined. This is used when client
2577 connection is disconnected. If the client on a channel is last, the
2578 channel is removed as well. This sends the SIGNOFF notify types. */
2580 void silc_server_remove_from_channels(SilcServer server,
2581 SilcSocketConnection sock,
2582 SilcClientEntry client,
2584 char *signoff_message,
2587 SilcChannelEntry channel;
2588 SilcChannelClientEntry chl;
2589 SilcHashTableList htl;
2592 SILC_LOG_DEBUG(("Start"));
2594 if (!client || !client->id)
2597 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2599 /* Remove the client from all channels. The client is removed from
2600 the channels' user list. */
2601 silc_hash_table_list(client->channels, &htl);
2602 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2603 channel = chl->channel;
2605 /* Remove channel from client's channel list */
2606 silc_hash_table_del(client->channels, channel);
2608 /* Remove channel if there is no users anymore */
2609 if (server->server_type == SILC_ROUTER &&
2610 silc_hash_table_count(channel->user_list) < 2) {
2612 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2613 if (silc_idlist_del_channel(server->local_list, channel))
2614 server->stat.my_channels--;
2616 silc_idlist_del_channel(server->global_list, channel);
2620 /* Remove client from channel's client list */
2621 silc_hash_table_del(channel->user_list, chl->client);
2622 channel->user_count--;
2624 /* If there is no global users on the channel anymore mark the channel
2625 as local channel. Do not check if the removed client is local client. */
2626 if (server->server_type != SILC_ROUTER && channel->global_users &&
2627 chl->client->router && !silc_server_channel_has_global(channel))
2628 channel->global_users = FALSE;
2631 server->stat.my_chanclients--;
2633 /* If there is not at least one local user on the channel then we don't
2634 need the channel entry anymore, we can remove it safely. */
2635 if (server->server_type != SILC_ROUTER &&
2636 !silc_server_channel_has_local(channel)) {
2637 /* Notify about leaving client if this channel has global users. */
2638 if (notify && channel->global_users)
2639 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2640 SILC_NOTIFY_TYPE_SIGNOFF,
2641 signoff_message ? 2 : 1,
2642 clidp->data, clidp->len,
2643 signoff_message, signoff_message ?
2644 strlen(signoff_message) : 0);
2647 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2649 if (channel->founder_key) {
2650 /* The founder auth data exists, do not remove the channel entry */
2651 SilcChannelClientEntry chl2;
2652 SilcHashTableList htl2;
2654 channel->disabled = TRUE;
2656 silc_hash_table_list(channel->user_list, &htl2);
2657 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2658 silc_hash_table_del(chl2->client->channels, channel);
2659 silc_hash_table_del(channel->user_list, chl2->client);
2660 channel->user_count--;
2663 silc_hash_table_list_reset(&htl2);
2667 /* Remove the channel entry */
2668 if (silc_idlist_del_channel(server->local_list, channel))
2669 server->stat.my_channels--;
2671 silc_idlist_del_channel(server->global_list, channel);
2675 /* Send notify to channel about client leaving SILC and thus
2676 the entire channel. */
2678 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2679 SILC_NOTIFY_TYPE_SIGNOFF,
2680 signoff_message ? 2 : 1,
2681 clidp->data, clidp->len,
2682 signoff_message, signoff_message ?
2683 strlen(signoff_message) : 0);
2685 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2686 /* Re-generate channel key */
2687 if (!silc_server_create_channel_key(server, channel, 0))
2690 /* Send the channel key to the channel. The key of course is not sent
2691 to the client who was removed from the channel. */
2692 silc_server_send_channel_key(server, client->connection, channel,
2693 server->server_type == SILC_ROUTER ?
2694 FALSE : !server->standalone);
2699 silc_hash_table_list_reset(&htl);
2700 silc_buffer_free(clidp);
2703 /* Removes client from one channel. This is used for example when client
2704 calls LEAVE command to remove itself from the channel. Returns TRUE
2705 if channel still exists and FALSE if the channel is removed when
2706 last client leaves the channel. If `notify' is FALSE notify messages
2709 int silc_server_remove_from_one_channel(SilcServer server,
2710 SilcSocketConnection sock,
2711 SilcChannelEntry channel,
2712 SilcClientEntry client,
2715 SilcChannelClientEntry chl;
2718 SILC_LOG_DEBUG(("Start"));
2720 /* Get the entry to the channel, if this client is not on the channel
2722 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2725 /* Remove the client from the channel. The client is removed from
2726 the channel's user list. */
2728 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2730 /* Remove channel from client's channel list */
2731 silc_hash_table_del(client->channels, chl->channel);
2733 /* Remove channel if there is no users anymore */
2734 if (server->server_type == SILC_ROUTER &&
2735 silc_hash_table_count(channel->user_list) < 2) {
2737 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2738 if (silc_idlist_del_channel(server->local_list, channel))
2739 server->stat.my_channels--;
2741 silc_idlist_del_channel(server->global_list, channel);
2742 silc_buffer_free(clidp);
2746 /* Remove client from channel's client list */
2747 silc_hash_table_del(channel->user_list, chl->client);
2748 channel->user_count--;
2750 /* If there is no global users on the channel anymore mark the channel
2751 as local channel. Do not check if the client is local client. */
2752 if (server->server_type != SILC_ROUTER && channel->global_users &&
2753 chl->client->router && !silc_server_channel_has_global(channel))
2754 channel->global_users = FALSE;
2757 server->stat.my_chanclients--;
2759 /* If there is not at least one local user on the channel then we don't
2760 need the channel entry anymore, we can remove it safely. */
2761 if (server->server_type != SILC_ROUTER &&
2762 !silc_server_channel_has_local(channel)) {
2763 /* Notify about leaving client if this channel has global users. */
2764 if (notify && channel->global_users)
2765 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2766 SILC_NOTIFY_TYPE_LEAVE, 1,
2767 clidp->data, clidp->len);
2769 silc_buffer_free(clidp);
2772 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2774 if (channel->founder_key) {
2775 /* The founder auth data exists, do not remove the channel entry */
2776 SilcChannelClientEntry chl2;
2777 SilcHashTableList htl2;
2779 channel->disabled = TRUE;
2781 silc_hash_table_list(channel->user_list, &htl2);
2782 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2783 silc_hash_table_del(chl2->client->channels, channel);
2784 silc_hash_table_del(channel->user_list, chl2->client);
2785 channel->user_count--;
2788 silc_hash_table_list_reset(&htl2);
2792 /* Remove the channel entry */
2793 if (silc_idlist_del_channel(server->local_list, channel))
2794 server->stat.my_channels--;
2796 silc_idlist_del_channel(server->global_list, channel);
2800 /* Send notify to channel about client leaving the channel */
2802 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2803 SILC_NOTIFY_TYPE_LEAVE, 1,
2804 clidp->data, clidp->len);
2806 silc_buffer_free(clidp);
2810 /* Timeout callback. This is called if connection is idle or for some
2811 other reason is not responding within some period of time. This
2812 disconnects the remote end. */
2814 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2816 SilcServer server = (SilcServer)context;
2817 SilcSocketConnection sock = server->sockets[fd];
2819 SILC_LOG_DEBUG(("Start"));
2824 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
2825 sock->hostname, sock->ip));
2827 /* If we have protocol active we must assure that we call the protocol's
2828 final callback so that all the memory is freed. */
2829 if (sock->protocol) {
2830 silc_protocol_cancel(sock->protocol, server->schedule);
2831 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2832 silc_protocol_execute_final(sock->protocol, server->schedule);
2833 sock->protocol = NULL;
2837 if (sock->user_data)
2838 silc_server_free_sock_user_data(server, sock, NULL);
2840 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2841 "Connection timeout");
2844 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2845 function may be used only by router. In real SILC network all channels
2846 are created by routers thus this function is never used by normal
2849 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2850 SilcServerID *router_id,
2856 SilcChannelID *channel_id;
2857 SilcChannelEntry entry;
2861 SILC_LOG_DEBUG(("Creating new channel"));
2864 cipher = SILC_DEFAULT_CIPHER;
2866 hmac = SILC_DEFAULT_HMAC;
2868 /* Allocate cipher */
2869 if (!silc_cipher_alloc(cipher, &key))
2873 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2874 silc_cipher_free(key);
2878 channel_name = strdup(channel_name);
2880 /* Create the channel ID */
2881 if (!silc_id_create_channel_id(server, router_id, server->rng,
2883 silc_free(channel_name);
2884 silc_cipher_free(key);
2885 silc_hmac_free(newhmac);
2889 /* Create the channel */
2890 entry = silc_idlist_add_channel(server->local_list, channel_name,
2891 SILC_CHANNEL_MODE_NONE, channel_id,
2892 NULL, key, newhmac, 0);
2894 silc_free(channel_name);
2895 silc_cipher_free(key);
2896 silc_hmac_free(newhmac);
2897 silc_free(channel_id);
2901 entry->cipher = strdup(cipher);
2902 entry->hmac_name = strdup(hmac);
2904 /* Now create the actual key material */
2905 if (!silc_server_create_channel_key(server, entry,
2906 silc_cipher_get_key_len(key) / 8)) {
2907 silc_idlist_del_channel(server->local_list, entry);
2911 /* Notify other routers about the new channel. We send the packet
2912 to our primary route. */
2913 if (broadcast && server->standalone == FALSE)
2914 silc_server_send_new_channel(server, server->router->connection, TRUE,
2915 channel_name, entry->id,
2916 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2919 server->stat.my_channels++;
2924 /* Same as above but creates the channel with Channel ID `channel_id. */
2927 silc_server_create_new_channel_with_id(SilcServer server,
2931 SilcChannelID *channel_id,
2934 SilcChannelEntry entry;
2938 SILC_LOG_DEBUG(("Creating new channel"));
2941 cipher = SILC_DEFAULT_CIPHER;
2943 hmac = SILC_DEFAULT_HMAC;
2945 /* Allocate cipher */
2946 if (!silc_cipher_alloc(cipher, &key))
2950 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2951 silc_cipher_free(key);
2955 channel_name = strdup(channel_name);
2957 /* Create the channel */
2958 entry = silc_idlist_add_channel(server->local_list, channel_name,
2959 SILC_CHANNEL_MODE_NONE, channel_id,
2960 NULL, key, newhmac, 0);
2962 silc_cipher_free(key);
2963 silc_hmac_free(newhmac);
2964 silc_free(channel_name);
2968 /* Now create the actual key material */
2969 if (!silc_server_create_channel_key(server, entry,
2970 silc_cipher_get_key_len(key) / 8)) {
2971 silc_idlist_del_channel(server->local_list, entry);
2975 /* Notify other routers about the new channel. We send the packet
2976 to our primary route. */
2977 if (broadcast && server->standalone == FALSE)
2978 silc_server_send_new_channel(server, server->router->connection, TRUE,
2979 channel_name, entry->id,
2980 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2983 server->stat.my_channels++;
2988 /* Channel's key re-key timeout callback. */
2990 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2992 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2993 SilcServer server = (SilcServer)rekey->context;
2997 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3000 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3003 /* Generates new channel key. This is used to create the initial channel key
3004 but also to re-generate new key for channel. If `key_len' is provided
3005 it is the bytes of the key length. */
3007 bool silc_server_create_channel_key(SilcServer server,
3008 SilcChannelEntry channel,
3012 unsigned char channel_key[32], hash[32];
3015 SILC_LOG_DEBUG(("Generating channel key"));
3017 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3018 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3022 if (!channel->channel_key)
3023 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3024 channel->channel_key = NULL;
3030 else if (channel->key_len)
3031 len = channel->key_len / 8;
3033 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3035 /* Create channel key */
3036 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3039 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3041 /* Remove old key if exists */
3043 memset(channel->key, 0, channel->key_len / 8);
3044 silc_free(channel->key);
3048 channel->key_len = len * 8;
3049 channel->key = silc_memdup(channel_key, len);
3050 memset(channel_key, 0, sizeof(channel_key));
3052 /* Generate HMAC key from the channel key data and set it */
3054 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3055 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3056 silc_hmac_set_key(channel->hmac, hash,
3057 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3058 memset(hash, 0, sizeof(hash));
3060 if (server->server_type == SILC_ROUTER) {
3061 if (!channel->rekey)
3062 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3063 channel->rekey->context = (void *)server;
3064 channel->rekey->channel = channel;
3065 channel->rekey->key_len = key_len;
3066 if (channel->rekey->task)
3067 silc_schedule_task_del(server->schedule, channel->rekey->task);
3069 channel->rekey->task =
3070 silc_schedule_task_add(server->schedule, 0,
3071 silc_server_channel_key_rekey,
3072 (void *)channel->rekey,
3073 server->config->channel_rekey_secs, 0,
3075 SILC_TASK_PRI_NORMAL);
3081 /* Saves the channel key found in the encoded `key_payload' buffer. This
3082 function is used when we receive Channel Key Payload and also when we're
3083 processing JOIN command reply. Returns entry to the channel. */
3085 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3086 SilcBuffer key_payload,
3087 SilcChannelEntry channel)
3089 SilcChannelKeyPayload payload = NULL;
3090 SilcChannelID *id = NULL;
3091 unsigned char *tmp, hash[32];
3095 SILC_LOG_DEBUG(("Start"));
3097 /* Decode channel key payload */
3098 payload = silc_channel_key_payload_parse(key_payload->data,
3101 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3106 /* Get the channel entry */
3109 /* Get channel ID */
3110 tmp = silc_channel_key_get_id(payload, &tmp_len);
3111 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3117 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3119 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3121 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3122 silc_id_render(id, SILC_ID_CHANNEL)));
3128 tmp = silc_channel_key_get_key(payload, &tmp_len);
3134 cipher = silc_channel_key_get_cipher(payload, NULL);
3140 /* Remove old key if exists */
3142 memset(channel->key, 0, channel->key_len / 8);
3143 silc_free(channel->key);
3144 silc_cipher_free(channel->channel_key);
3147 /* Create new cipher */
3148 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3149 channel->channel_key = NULL;
3154 if (channel->cipher)
3155 silc_free(channel->cipher);
3156 channel->cipher = strdup(cipher);
3159 channel->key_len = tmp_len * 8;
3160 channel->key = silc_memdup(tmp, tmp_len);
3161 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3163 /* Generate HMAC key from the channel key data and set it */
3165 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3166 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3167 silc_hmac_set_key(channel->hmac, hash,
3168 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3170 memset(hash, 0, sizeof(hash));
3171 memset(tmp, 0, tmp_len);
3173 if (server->server_type == SILC_ROUTER) {
3174 if (!channel->rekey)
3175 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3176 channel->rekey->context = (void *)server;
3177 channel->rekey->channel = channel;
3178 if (channel->rekey->task)
3179 silc_schedule_task_del(server->schedule, channel->rekey->task);
3181 channel->rekey->task =
3182 silc_schedule_task_add(server->schedule, 0,
3183 silc_server_channel_key_rekey,
3184 (void *)channel->rekey,
3185 server->config->channel_rekey_secs, 0,
3187 SILC_TASK_PRI_NORMAL);
3193 silc_channel_key_payload_free(payload);
3198 /* Heartbeat callback. This function is set as argument for the
3199 silc_socket_set_heartbeat function. The library will call this function
3200 at the set time interval. */
3202 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3205 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3207 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3209 /* Send the heartbeat */
3210 silc_server_send_heartbeat(hb->server, sock);
3213 /* Returns assembled of all servers in the given ID list. The packet's
3214 form is dictated by the New ID payload. */
3216 static void silc_server_announce_get_servers(SilcServer server,
3217 SilcServerEntry remote,
3219 SilcBuffer *servers,
3220 unsigned long creation_time)
3222 SilcIDCacheList list;
3223 SilcIDCacheEntry id_cache;
3224 SilcServerEntry entry;
3227 /* Go through all clients in the list */
3228 if (silc_idcache_get_all(id_list->servers, &list)) {
3229 if (silc_idcache_list_first(list, &id_cache)) {
3231 entry = (SilcServerEntry)id_cache->context;
3233 /* Do not announce the one we've sending our announcements and
3234 do not announce ourself. Also check the creation time if it's
3236 if ((entry == remote) || (entry == server->id_entry) ||
3237 (creation_time && entry->data.created < creation_time)) {
3238 if (!silc_idcache_list_next(list, &id_cache))
3243 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3245 *servers = silc_buffer_realloc(*servers,
3247 (*servers)->truelen + idp->len :
3249 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3250 silc_buffer_put(*servers, idp->data, idp->len);
3251 silc_buffer_pull(*servers, idp->len);
3252 silc_buffer_free(idp);
3254 if (!silc_idcache_list_next(list, &id_cache))
3259 silc_idcache_list_free(list);
3264 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3270 p = silc_notify_payload_encode(notify, argc, ap);
3276 /* This function is used by router to announce existing servers to our
3277 primary router when we've connected to it. If `creation_time' is non-zero
3278 then only the servers that has been created after the `creation_time'
3279 will be announced. */
3281 void silc_server_announce_servers(SilcServer server, bool global,
3282 unsigned long creation_time,
3283 SilcSocketConnection remote)
3285 SilcBuffer servers = NULL;
3287 SILC_LOG_DEBUG(("Announcing servers"));
3289 /* Get servers in local list */
3290 silc_server_announce_get_servers(server, remote->user_data,
3291 server->local_list, &servers,
3295 /* Get servers in global list */
3296 silc_server_announce_get_servers(server, remote->user_data,
3297 server->global_list, &servers,
3301 silc_buffer_push(servers, servers->data - servers->head);
3302 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3304 /* Send the packet */
3305 silc_server_packet_send(server, remote,
3306 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3307 servers->data, servers->len, TRUE);
3309 silc_buffer_free(servers);
3313 /* Returns assembled packet of all clients in the given ID list. The
3314 packet's form is dictated by the New ID Payload. */
3316 static void silc_server_announce_get_clients(SilcServer server,
3318 SilcBuffer *clients,
3320 unsigned long creation_time)
3322 SilcIDCacheList list;
3323 SilcIDCacheEntry id_cache;
3324 SilcClientEntry client;
3327 unsigned char mode[4];
3329 /* Go through all clients in the list */
3330 if (silc_idcache_get_all(id_list->clients, &list)) {
3331 if (silc_idcache_list_first(list, &id_cache)) {
3333 client = (SilcClientEntry)id_cache->context;
3335 if (creation_time && client->data.created < creation_time) {
3336 if (!silc_idcache_list_next(list, &id_cache))
3341 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3343 *clients = silc_buffer_realloc(*clients,
3345 (*clients)->truelen + idp->len :
3347 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3348 silc_buffer_put(*clients, idp->data, idp->len);
3349 silc_buffer_pull(*clients, idp->len);
3351 SILC_PUT32_MSB(client->mode, mode);
3352 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3353 2, idp->data, idp->len,
3355 *umodes = silc_buffer_realloc(*umodes,
3357 (*umodes)->truelen + tmp->len :
3359 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3360 silc_buffer_put(*umodes, tmp->data, tmp->len);
3361 silc_buffer_pull(*umodes, tmp->len);
3362 silc_buffer_free(tmp);
3364 silc_buffer_free(idp);
3366 if (!silc_idcache_list_next(list, &id_cache))
3371 silc_idcache_list_free(list);
3375 /* This function is used to announce our existing clients to our router
3376 when we've connected to it. If `creation_time' is non-zero then only
3377 the clients that has been created after the `creation_time' will be
3380 void silc_server_announce_clients(SilcServer server,
3381 unsigned long creation_time,
3382 SilcSocketConnection remote)
3384 SilcBuffer clients = NULL;
3385 SilcBuffer umodes = NULL;
3387 SILC_LOG_DEBUG(("Announcing clients"));
3389 /* Get clients in local list */
3390 silc_server_announce_get_clients(server, server->local_list,
3391 &clients, &umodes, creation_time);
3393 /* As router we announce our global list as well */
3394 if (server->server_type == SILC_ROUTER)
3395 silc_server_announce_get_clients(server, server->global_list,
3396 &clients, &umodes, creation_time);
3399 silc_buffer_push(clients, clients->data - clients->head);
3400 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3402 /* Send the packet */
3403 silc_server_packet_send(server, remote,
3404 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3405 clients->data, clients->len, TRUE);
3407 silc_buffer_free(clients);
3411 silc_buffer_push(umodes, umodes->data - umodes->head);
3412 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3414 /* Send the packet */
3415 silc_server_packet_send(server, remote,
3416 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3417 umodes->data, umodes->len, TRUE);
3419 silc_buffer_free(umodes);
3423 /* Returns channel's topic for announcing it */
3425 void silc_server_announce_get_channel_topic(SilcServer server,
3426 SilcChannelEntry channel,
3431 if (channel->topic) {
3432 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3433 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3434 chidp->data, chidp->len,
3436 strlen(channel->topic));
3437 silc_buffer_free(chidp);
3441 /* Returns assembled packets for channel users of the `channel'. */
3443 void silc_server_announce_get_channel_users(SilcServer server,
3444 SilcChannelEntry channel,
3445 SilcBuffer *channel_users,
3446 SilcBuffer *channel_users_modes)
3448 SilcChannelClientEntry chl;
3449 SilcHashTableList htl;
3450 SilcBuffer chidp, clidp;
3453 unsigned char mode[4];
3455 SILC_LOG_DEBUG(("Start"));
3457 /* Now find all users on the channel */
3458 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3459 silc_hash_table_list(channel->user_list, &htl);
3460 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3461 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3464 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3465 clidp->data, clidp->len,
3466 chidp->data, chidp->len);
3469 silc_buffer_realloc(*channel_users,
3471 (*channel_users)->truelen + len : len));
3472 silc_buffer_pull_tail(*channel_users,
3473 ((*channel_users)->end -
3474 (*channel_users)->data));
3476 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3477 silc_buffer_pull(*channel_users, len);
3478 silc_buffer_free(tmp);
3480 /* CUMODE notify for mode change on the channel */
3481 SILC_PUT32_MSB(chl->mode, mode);
3482 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3483 3, clidp->data, clidp->len,
3485 clidp->data, clidp->len);
3487 *channel_users_modes =
3488 silc_buffer_realloc(*channel_users_modes,
3489 (*channel_users_modes ?
3490 (*channel_users_modes)->truelen + len : len));
3491 silc_buffer_pull_tail(*channel_users_modes,
3492 ((*channel_users_modes)->end -
3493 (*channel_users_modes)->data));
3495 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3496 silc_buffer_pull(*channel_users_modes, len);
3497 silc_buffer_free(tmp);
3499 silc_buffer_free(clidp);
3501 silc_hash_table_list_reset(&htl);
3502 silc_buffer_free(chidp);
3505 /* Returns assembled packets for all channels and users on those channels
3506 from the given ID List. The packets are in the form dictated by the
3507 New Channel and New Channel User payloads. */
3509 void silc_server_announce_get_channels(SilcServer server,
3511 SilcBuffer *channels,
3512 SilcBuffer *channel_users,
3513 SilcBuffer **channel_users_modes,
3514 SilcUInt32 *channel_users_modes_c,
3515 SilcBuffer **channel_topics,
3516 SilcChannelID ***channel_ids,
3517 unsigned long creation_time)
3519 SilcIDCacheList list;
3520 SilcIDCacheEntry id_cache;
3521 SilcChannelEntry channel;
3524 SilcUInt16 name_len;
3526 int i = *channel_users_modes_c;
3529 SILC_LOG_DEBUG(("Start"));
3531 /* Go through all channels in the list */
3532 if (silc_idcache_get_all(id_list->channels, &list)) {
3533 if (silc_idcache_list_first(list, &id_cache)) {
3535 channel = (SilcChannelEntry)id_cache->context;
3537 if (creation_time && channel->created < creation_time)
3542 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3543 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3544 name_len = strlen(channel->channel_name);
3547 len = 4 + name_len + id_len + 4;
3549 silc_buffer_realloc(*channels,
3550 (*channels ? (*channels)->truelen +
3552 silc_buffer_pull_tail(*channels,
3553 ((*channels)->end - (*channels)->data));
3554 silc_buffer_format(*channels,
3555 SILC_STR_UI_SHORT(name_len),
3556 SILC_STR_UI_XNSTRING(channel->channel_name,
3558 SILC_STR_UI_SHORT(id_len),
3559 SILC_STR_UI_XNSTRING(cid, id_len),
3560 SILC_STR_UI_INT(channel->mode),
3562 silc_buffer_pull(*channels, len);
3565 /* Channel user modes */
3566 *channel_users_modes = silc_realloc(*channel_users_modes,
3567 sizeof(**channel_users_modes) *
3569 (*channel_users_modes)[i] = NULL;
3570 *channel_ids = silc_realloc(*channel_ids,
3571 sizeof(**channel_ids) * (i + 1));
3572 (*channel_ids)[i] = NULL;
3573 silc_server_announce_get_channel_users(server, channel,
3575 &(*channel_users_modes)[i]);
3576 (*channel_ids)[i] = channel->id;
3578 /* Channel's topic */
3579 *channel_topics = silc_realloc(*channel_topics,
3580 sizeof(**channel_topics) * (i + 1));
3581 (*channel_topics)[i] = NULL;
3582 silc_server_announce_get_channel_topic(server, channel,
3583 &(*channel_topics)[i]);
3586 if (!silc_idcache_list_next(list, &id_cache))
3590 *channel_users_modes_c += i;
3593 silc_idcache_list_free(list);
3597 /* This function is used to announce our existing channels to our router
3598 when we've connected to it. This also announces the users on the
3599 channels to the router. If the `creation_time' is non-zero only the
3600 channels that was created after the `creation_time' are announced.
3601 Note that the channel users are still announced even if the `creation_time'
3604 void silc_server_announce_channels(SilcServer server,
3605 unsigned long creation_time,
3606 SilcSocketConnection remote)
3608 SilcBuffer channels = NULL, channel_users = NULL;
3609 SilcBuffer *channel_users_modes = NULL;
3610 SilcBuffer *channel_topics = NULL;
3611 SilcUInt32 channel_users_modes_c = 0;
3612 SilcChannelID **channel_ids = NULL;
3614 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3616 /* Get channels and channel users in local list */
3617 silc_server_announce_get_channels(server, server->local_list,
3618 &channels, &channel_users,
3619 &channel_users_modes,
3620 &channel_users_modes_c,
3622 &channel_ids, creation_time);
3624 /* Get channels and channel users in global list */
3625 if (server->server_type != SILC_SERVER)
3626 silc_server_announce_get_channels(server, server->global_list,
3627 &channels, &channel_users,
3628 &channel_users_modes,
3629 &channel_users_modes_c,
3631 &channel_ids, creation_time);
3634 silc_buffer_push(channels, channels->data - channels->head);
3635 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3637 /* Send the packet */
3638 silc_server_packet_send(server, remote,
3639 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3640 channels->data, channels->len,
3643 silc_buffer_free(channels);
3646 if (channel_users) {
3647 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3648 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3649 channel_users->len);
3651 /* Send the packet */
3652 silc_server_packet_send(server, remote,
3653 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3654 channel_users->data, channel_users->len,
3657 silc_buffer_free(channel_users);
3660 if (channel_users_modes) {
3663 for (i = 0; i < channel_users_modes_c; i++) {
3664 if (!channel_users_modes[i])
3666 silc_buffer_push(channel_users_modes[i],
3667 channel_users_modes[i]->data -
3668 channel_users_modes[i]->head);
3669 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3670 channel_users_modes[i]->len);
3671 silc_server_packet_send_dest(server, remote,
3672 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3673 channel_ids[i], SILC_ID_CHANNEL,
3674 channel_users_modes[i]->data,
3675 channel_users_modes[i]->len,
3677 silc_buffer_free(channel_users_modes[i]);
3679 silc_free(channel_users_modes);
3682 if (channel_topics) {
3685 for (i = 0; i < channel_users_modes_c; i++) {
3686 if (!channel_topics[i])
3689 silc_buffer_push(channel_topics[i],
3690 channel_topics[i]->data -
3691 channel_topics[i]->head);
3692 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3693 channel_topics[i]->len);
3694 silc_server_packet_send_dest(server, remote,
3695 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3696 channel_ids[i], SILC_ID_CHANNEL,
3697 channel_topics[i]->data,
3698 channel_topics[i]->len,
3700 silc_buffer_free(channel_topics[i]);
3702 silc_free(channel_topics);
3705 silc_free(channel_ids);
3708 /* Failure timeout callback. If this is called then we will immediately
3709 process the received failure. We always process the failure with timeout
3710 since we do not want to blindly trust to received failure packets.
3711 This won't be called (the timeout is cancelled) if the failure was
3712 bogus (it is bogus if remote does not close the connection after sending
3715 SILC_TASK_CALLBACK(silc_server_failure_callback)
3717 SilcServerFailureContext f = (SilcServerFailureContext)context;
3719 if (f->sock->protocol) {
3720 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3721 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3727 /* Assembles user list and users mode list from the `channel'. */
3729 void silc_server_get_users_on_channel(SilcServer server,
3730 SilcChannelEntry channel,
3731 SilcBuffer *user_list,
3732 SilcBuffer *mode_list,
3733 SilcUInt32 *user_count)
3735 SilcChannelClientEntry chl;
3736 SilcHashTableList htl;
3737 SilcBuffer client_id_list;
3738 SilcBuffer client_mode_list;
3740 SilcUInt32 list_count = 0, len = 0;
3742 silc_hash_table_list(channel->user_list, &htl);
3743 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3744 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3745 silc_hash_table_list_reset(&htl);
3747 client_id_list = silc_buffer_alloc(len);
3749 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3750 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3751 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3753 silc_hash_table_list(channel->user_list, &htl);
3754 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3756 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3757 silc_buffer_put(client_id_list, idp->data, idp->len);
3758 silc_buffer_pull(client_id_list, idp->len);
3759 silc_buffer_free(idp);
3761 /* Client's mode on channel */
3762 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3763 silc_buffer_pull(client_mode_list, 4);
3767 silc_hash_table_list_reset(&htl);
3768 silc_buffer_push(client_id_list,
3769 client_id_list->data - client_id_list->head);
3770 silc_buffer_push(client_mode_list,
3771 client_mode_list->data - client_mode_list->head);
3773 *user_list = client_id_list;
3774 *mode_list = client_mode_list;
3775 *user_count = list_count;
3778 /* Saves users and their modes to the `channel'. */
3780 void silc_server_save_users_on_channel(SilcServer server,
3781 SilcSocketConnection sock,
3782 SilcChannelEntry channel,
3783 SilcClientID *noadd,
3784 SilcBuffer user_list,
3785 SilcBuffer mode_list,
3786 SilcUInt32 user_count)
3791 SilcClientID *client_id;
3792 SilcClientEntry client;
3793 SilcIDCacheEntry cache;
3796 SILC_LOG_DEBUG(("Start"));
3798 for (i = 0; i < user_count; i++) {
3800 SILC_GET16_MSB(idp_len, user_list->data + 2);
3802 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3803 silc_buffer_pull(user_list, idp_len);
3808 SILC_GET32_MSB(mode, mode_list->data);
3809 silc_buffer_pull(mode_list, 4);
3811 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3812 silc_free(client_id);
3818 /* Check if we have this client cached already. */
3819 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3820 server->server_type, &cache);
3822 client = silc_idlist_find_client_by_id(server->global_list,
3823 client_id, server->server_type,
3828 /* If router did not find such Client ID in its lists then this must
3829 be bogus client or some router in the net is buggy. */
3830 if (server->server_type == SILC_ROUTER) {
3831 silc_free(client_id);
3835 /* We don't have that client anywhere, add it. The client is added
3836 to global list since server didn't have it in the lists so it must be
3838 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3839 silc_id_dup(client_id, SILC_ID_CLIENT),
3840 sock->user_data, NULL, 0);
3842 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3843 silc_free(client_id);
3847 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3849 /* Found, if it is from global list we'll assure that we won't
3850 expire it now that the entry is on channel. */
3855 silc_free(client_id);
3857 if (!silc_server_client_on_channel(client, channel)) {
3858 /* Client was not on the channel, add it. */
3859 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3860 chl->client = client;
3862 chl->channel = channel;
3863 silc_hash_table_add(channel->user_list, chl->client, chl);
3864 silc_hash_table_add(client->channels, chl->channel, chl);
3865 channel->user_count++;
3870 /* Lookups route to the client indicated by the `id_data'. The connection
3871 object and internal data object is returned. Returns NULL if route
3872 could not be found to the client. If the `client_id' is specified then
3873 it is used and the `id_data' is ignored. */
3875 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3876 unsigned char *id_data,
3878 SilcClientID *client_id,
3879 SilcIDListData *idata)
3882 SilcClientEntry client;
3884 SILC_LOG_DEBUG(("Start"));
3886 /* Decode destination Client ID */
3888 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3890 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3894 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3897 /* If the destination belongs to our server we don't have to route
3898 the packet anywhere but to send it to the local destination. */
3899 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3903 /* If we are router and the client has router then the client is in
3904 our cell but not directly connected to us. */
3905 if (server->server_type == SILC_ROUTER && client->router) {
3906 /* We are of course in this case the client's router thus the route
3907 to the client is the server who owns the client. So, we will send
3908 the packet to that server. */
3910 *idata = (SilcIDListData)client->router;
3911 return client->router->connection;
3914 /* Seems that client really is directly connected to us */
3916 *idata = (SilcIDListData)client;
3917 return client->connection;
3920 /* Destination belongs to someone not in this server. If we are normal
3921 server our action is to send the packet to our router. */
3922 if (server->server_type != SILC_ROUTER && !server->standalone) {
3925 *idata = (SilcIDListData)server->router;
3926 return server->router->connection;
3929 /* We are router and we will perform route lookup for the destination
3930 and send the packet to fastest route. */
3931 if (server->server_type == SILC_ROUTER && !server->standalone) {
3932 /* Check first that the ID is valid */
3933 client = silc_idlist_find_client_by_id(server->global_list, id,
3936 SilcSocketConnection dst_sock;
3938 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3942 *idata = (SilcIDListData)dst_sock->user_data;
3951 /* Encodes and returns channel list of channels the `client' has joined.
3952 Secret channels are not put to the list. */
3954 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3955 SilcClientEntry client)
3957 SilcBuffer buffer = NULL;
3958 SilcChannelEntry channel;
3959 SilcChannelClientEntry chl;
3960 SilcHashTableList htl;
3963 SilcUInt16 name_len;
3966 silc_hash_table_list(client->channels, &htl);
3967 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3968 channel = chl->channel;
3970 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3971 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3974 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3975 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3976 name_len = strlen(channel->channel_name);
3978 len = 4 + name_len + id_len + 4;
3979 buffer = silc_buffer_realloc(buffer,
3980 (buffer ? (buffer)->truelen + len : len));
3981 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3982 silc_buffer_format(buffer,
3983 SILC_STR_UI_SHORT(name_len),
3984 SILC_STR_UI_XNSTRING(channel->channel_name,
3986 SILC_STR_UI_SHORT(id_len),
3987 SILC_STR_UI_XNSTRING(cid, id_len),
3988 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3990 silc_buffer_pull(buffer, len);
3993 silc_hash_table_list_reset(&htl);
3996 silc_buffer_push(buffer, buffer->data - buffer->head);
4001 /* Finds client entry by Client ID and if it is not found then resolves
4002 it using WHOIS command. */
4004 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4005 SilcClientID *client_id,
4008 SilcClientEntry client;
4013 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4016 client = silc_idlist_find_client_by_id(server->global_list,
4017 client_id, TRUE, NULL);
4018 if (!client && server->server_type == SILC_ROUTER)
4022 if (!client && server->standalone)
4025 if (!client || !client->nickname || !client->username) {
4026 SilcBuffer buffer, idp;
4028 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4029 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4030 client->resolve_cmd_ident = ++server->cmd_ident;
4032 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4033 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4034 server->cmd_ident, 1,
4035 3, idp->data, idp->len);
4036 silc_server_packet_send(server, client ? client->router->connection :
4037 server->router->connection,
4038 SILC_PACKET_COMMAND, 0,
4039 buffer->data, buffer->len, FALSE);
4040 silc_buffer_free(idp);
4041 silc_buffer_free(buffer);
4052 /* A timeout callback for the re-key. We will be the initiator of the
4055 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4057 SilcSocketConnection sock = (SilcSocketConnection)context;
4058 SilcIDListData idata = (SilcIDListData)sock->user_data;
4059 SilcServer server = (SilcServer)idata->rekey->context;
4060 SilcProtocol protocol;
4061 SilcServerRekeyInternalContext *proto_ctx;
4063 SILC_LOG_DEBUG(("Start"));
4065 /* Allocate internal protocol context. This is sent as context
4067 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4068 proto_ctx->server = (void *)server;
4069 proto_ctx->sock = sock;
4070 proto_ctx->responder = FALSE;
4071 proto_ctx->pfs = idata->rekey->pfs;
4073 /* Perform rekey protocol. Will call the final callback after the
4074 protocol is over. */
4075 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4076 &protocol, proto_ctx, silc_server_rekey_final);
4077 sock->protocol = protocol;
4079 /* Run the protocol */
4080 silc_protocol_execute(protocol, server->schedule, 0, 0);
4082 /* Re-register re-key timeout */
4083 silc_schedule_task_add(server->schedule, sock->sock,
4084 silc_server_rekey_callback,
4085 context, idata->rekey->timeout, 0,
4086 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4089 /* The final callback for the REKEY protocol. This will actually take the
4090 new key material into use. */
4092 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4094 SilcProtocol protocol = (SilcProtocol)context;
4095 SilcServerRekeyInternalContext *ctx =
4096 (SilcServerRekeyInternalContext *)protocol->context;
4097 SilcServer server = (SilcServer)ctx->server;
4098 SilcSocketConnection sock = ctx->sock;
4100 SILC_LOG_DEBUG(("Start"));
4102 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4103 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4104 /* Error occured during protocol */
4105 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4106 silc_protocol_cancel(protocol, server->schedule);
4107 silc_protocol_free(protocol);
4108 sock->protocol = NULL;
4110 silc_packet_context_free(ctx->packet);
4112 silc_ske_free(ctx->ske);
4117 /* Purge the outgoing data queue to assure that all rekey packets really
4118 go to the network before we quit the protocol. */
4119 silc_server_packet_queue_purge(server, sock);
4122 silc_protocol_free(protocol);
4123 sock->protocol = NULL;
4125 silc_packet_context_free(ctx->packet);
4127 silc_ske_free(ctx->ske);