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;
1287 SilcUInt32 num_sockets;
1289 SILC_LOG_DEBUG(("Start"));
1291 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1292 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1293 /* Error occured during protocol */
1294 silc_protocol_free(protocol);
1295 sock->protocol = NULL;
1297 silc_packet_context_free(ctx->packet);
1299 silc_ske_free(ctx->ske);
1300 silc_free(ctx->dest_id);
1302 silc_schedule_task_del_by_callback(server->schedule,
1303 silc_server_failure_callback);
1304 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1305 "Authentication failed");
1306 server->stat.auth_failures++;
1310 entry->data.last_receive = time(NULL);
1312 num_sockets = silc_server_num_sockets_by_ip(server, sock->ip,
1315 switch (ctx->conn_type) {
1316 case SILC_SOCKET_TYPE_CLIENT:
1318 SilcClientEntry client;
1319 SilcServerConfigClient *conn = ctx->cconfig;
1320 SilcUInt32 max_per_host = server->config->param.connections_max_per_host;
1322 /* Check for maximum connections limit */
1324 if (conn->param->connections_max &&
1325 server->stat.my_clients >= conn->param->connections_max) {
1326 SILC_LOG_INFO(("Server is full, closing %s (%s) connection",
1327 sock->hostname, sock->ip));
1328 silc_server_disconnect_remote(server, sock,
1329 "Server closed connection: "
1330 "Server is full, try again later");
1331 server->stat.auth_failures++;
1335 max_per_host = conn->param->connections_max_per_host;
1338 if (num_sockets >= max_per_host) {
1339 SILC_LOG_INFO(("Too many connections from %s (%s), closing connection",
1340 sock->hostname, sock->ip));
1341 silc_server_disconnect_remote(server, sock,
1342 "Server closed connection: "
1343 "Too many connections from your host");
1344 server->stat.auth_failures++;
1348 SILC_LOG_DEBUG(("Remote host is client"));
1349 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1352 /* Add the client to the client ID cache. The nickname and Client ID
1353 and other information is created after we have received NEW_CLIENT
1354 packet from client. */
1355 client = silc_idlist_add_client(server->local_list,
1356 NULL, NULL, NULL, NULL, NULL, sock, 0);
1358 SILC_LOG_ERROR(("Could not add new client to cache"));
1359 silc_free(sock->user_data);
1360 silc_server_disconnect_remote(server, sock,
1361 "Server closed connection: "
1362 "Authentication failed");
1363 server->stat.auth_failures++;
1368 server->stat.my_clients++;
1369 server->stat.clients++;
1370 if (server->server_type == SILC_ROUTER)
1371 server->stat.cell_clients++;
1373 /* Get connection parameters */
1375 if (conn->param->keepalive_secs)
1376 hearbeat_timeout = conn->param->keepalive_secs;
1379 id_entry = (void *)client;
1382 case SILC_SOCKET_TYPE_SERVER:
1383 case SILC_SOCKET_TYPE_ROUTER:
1385 SilcServerEntry new_server;
1386 bool initiator = FALSE;
1387 bool backup_local = FALSE;
1388 bool backup_router = FALSE;
1389 char *backup_replace_ip = NULL;
1390 SilcUInt16 backup_replace_port = 0;
1391 SilcServerConfigServer *sconn = ctx->sconfig;
1392 SilcServerConfigRouter *rconn = ctx->rconfig;
1393 SilcUInt32 max_per_host = server->config->param.connections_max_per_host;
1395 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && rconn) {
1397 /* Check for maximum connections limit */
1398 if (rconn->param->connections_max &&
1399 server->stat.my_routers >= rconn->param->connections_max) {
1400 silc_server_disconnect_remote(server, sock,
1401 "Server closed connection: "
1402 "Server is full, try again later");
1403 server->stat.auth_failures++;
1406 max_per_host = rconn->param->connections_max_per_host;
1408 if (rconn->param->keepalive_secs)
1409 hearbeat_timeout = rconn->param->keepalive_secs;
1412 initiator = rconn->initiator;
1413 backup_local = rconn->backup_local;
1414 backup_router = rconn->backup_router;
1415 backup_replace_ip = rconn->backup_replace_ip;
1416 backup_replace_port = rconn->backup_replace_port;
1419 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER && sconn) {
1421 /* Check for maximum connections limit */
1422 if (sconn->param->connections_max &&
1423 server->stat.my_servers >= sconn->param->connections_max) {
1424 SILC_LOG_INFO(("Server is full, closing %s (%s) connection",
1425 sock->hostname, sock->ip));
1426 silc_server_disconnect_remote(server, sock,
1427 "Server closed connection: "
1428 "Server is full, try again later");
1429 server->stat.auth_failures++;
1432 max_per_host = sconn->param->connections_max_per_host;
1434 if (sconn->param->keepalive_secs)
1435 hearbeat_timeout = sconn->param->keepalive_secs;
1438 backup_router = sconn->backup_router;
1441 if (num_sockets >= max_per_host) {
1442 SILC_LOG_INFO(("Too many connections from %s (%s), closing connection",
1443 sock->hostname, sock->ip));
1444 silc_server_disconnect_remote(server, sock,
1445 "Server closed connection: "
1446 "Too many connections from your host");
1447 server->stat.auth_failures++;
1451 SILC_LOG_DEBUG(("Remote host is %s",
1452 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1453 "server" : (backup_router ?
1454 "backup router" : "router")));
1455 SILC_LOG_INFO(("Connection s (%s) is %s", sock->hostname,
1456 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1457 "server" : (backup_router ?
1458 "backup router" : "router")));
1460 /* Add the server into server cache. The server name and Server ID
1461 is updated after we have received NEW_SERVER packet from the
1462 server. We mark ourselves as router for this server if we really
1465 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1466 server->local_list : (backup_router ?
1467 server->local_list :
1468 server->global_list)),
1470 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1471 SILC_SERVER : SILC_ROUTER),
1473 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1474 server->id_entry : (backup_router ?
1475 server->id_entry : NULL)),
1478 SILC_LOG_ERROR(("Could not add new server to cache"));
1479 silc_free(sock->user_data);
1480 silc_server_disconnect_remote(server, sock,
1481 "Server closed connection: "
1482 "Authentication failed");
1483 server->stat.auth_failures++;
1488 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1489 server->stat.my_servers++;
1491 server->stat.my_routers++;
1492 server->stat.servers++;
1494 id_entry = (void *)new_server;
1496 /* If the incoming connection is router and marked as backup router
1497 then add it to be one of our backups */
1498 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1499 silc_server_backup_add(server, new_server, backup_replace_ip,
1500 backup_replace_port, backup_local);
1502 /* Change it back to SERVER type since that's what it really is. */
1504 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1506 new_server->server_type = SILC_BACKUP_ROUTER;
1509 /* Check whether this connection is to be our primary router connection
1510 if we do not already have the primary route. */
1511 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1512 if (silc_server_config_is_primary_route(server) && !initiator)
1515 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1516 server->standalone = FALSE;
1517 if (!server->id_entry->router) {
1518 server->id_entry->router = id_entry;
1519 server->router = id_entry;
1530 sock->type = ctx->conn_type;
1532 /* Add the common data structure to the ID entry. */
1533 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1535 /* Add to sockets internal pointer for fast referencing */
1536 silc_free(sock->user_data);
1537 sock->user_data = id_entry;
1539 /* Connection has been fully established now. Everything is ok. */
1540 SILC_LOG_DEBUG(("New connection authenticated"));
1542 /* Perform keepalive. The `hb_context' will be freed automatically
1543 when finally calling the silc_socket_free function. */
1544 hb_context = silc_calloc(1, sizeof(*hb_context));
1545 hb_context->server = server;
1546 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1547 silc_server_perform_heartbeat,
1551 silc_schedule_task_del_by_callback(server->schedule,
1552 silc_server_failure_callback);
1553 silc_protocol_free(protocol);
1555 silc_packet_context_free(ctx->packet);
1557 silc_ske_free(ctx->ske);
1558 silc_free(ctx->dest_id);
1560 sock->protocol = NULL;
1563 /* This function is used to read packets from network and send packets to
1564 network. This is usually a generic task. */
1566 SILC_TASK_CALLBACK(silc_server_packet_process)
1568 SilcServer server = (SilcServer)context;
1569 SilcSocketConnection sock = server->sockets[fd];
1570 SilcIDListData idata;
1571 SilcCipher cipher = NULL;
1572 SilcHmac hmac = NULL;
1573 SilcUInt32 sequence = 0;
1579 SILC_LOG_DEBUG(("Processing packet"));
1581 /* Packet sending */
1583 if (type == SILC_TASK_WRITE) {
1584 /* Do not send data to disconnected connection */
1585 if (SILC_IS_DISCONNECTED(sock))
1588 server->stat.packets_sent++;
1590 if (sock->outbuf->data - sock->outbuf->head)
1591 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1593 /* Send the packet */
1594 ret = silc_packet_send(sock, TRUE);
1596 /* If returned -2 could not write to connection now, will do
1602 SILC_LOG_ERROR(("Error sending packet to connection "
1603 "%s:%d [%s]", sock->hostname, sock->port,
1604 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1605 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1606 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1611 /* The packet has been sent and now it is time to set the connection
1612 back to only for input. When there is again some outgoing data
1613 available for this connection it will be set for output as well.
1614 This call clears the output setting and sets it only for input. */
1615 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1616 SILC_UNSET_OUTBUF_PENDING(sock);
1618 silc_buffer_clear(sock->outbuf);
1622 /* Packet receiving */
1624 /* Read some data from connection */
1625 ret = silc_packet_receive(sock);
1629 SILC_LOG_ERROR(("Error receiving packet from connection "
1630 "%s:%d [%s] %s", sock->hostname, sock->port,
1631 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1632 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1633 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1634 "Router"), strerror(errno)));
1640 SILC_LOG_DEBUG(("Read EOF"));
1642 /* If connection is disconnecting already we will finally
1643 close the connection */
1644 if (SILC_IS_DISCONNECTING(sock)) {
1645 if (sock->user_data)
1646 silc_server_free_sock_user_data(server, sock, NULL);
1647 silc_server_close_connection(server, sock);
1651 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1652 SILC_SET_DISCONNECTING(sock);
1654 if (sock->user_data) {
1656 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1657 silc_server_free_sock_user_data(server, sock, tmp);
1659 silc_server_free_sock_user_data(server, sock, NULL);
1660 } else if (server->router_conn && server->router_conn->sock == sock &&
1661 !server->router && server->standalone)
1662 silc_schedule_task_add(server->schedule, 0,
1663 silc_server_connect_to_router,
1666 SILC_TASK_PRI_NORMAL);
1668 silc_server_close_connection(server, sock);
1672 /* If connection is disconnecting or disconnected we will ignore
1674 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1675 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1679 server->stat.packets_received++;
1681 /* Get keys and stuff from ID entry */
1682 idata = (SilcIDListData)sock->user_data;
1684 cipher = idata->receive_key;
1685 hmac = idata->hmac_receive;
1686 sequence = idata->psn_receive;
1689 /* Process the packet. This will call the parser that will then
1690 decrypt and parse the packet. */
1691 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1692 TRUE : FALSE, cipher, hmac, sequence,
1693 silc_server_packet_parse, server);
1695 /* If this socket connection is not authenticated yet and the packet
1696 processing failed we will drop the connection since it can be
1697 a malicious flooder. */
1698 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1699 (!sock->protocol || sock->protocol->protocol->type ==
1700 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1701 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1702 SILC_SET_DISCONNECTING(sock);
1704 if (sock->user_data)
1705 silc_server_free_sock_user_data(server, sock, NULL);
1706 silc_server_close_connection(server, sock);
1710 /* Parses whole packet, received earlier. */
1712 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1714 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1715 SilcServer server = (SilcServer)parse_ctx->context;
1716 SilcSocketConnection sock = parse_ctx->sock;
1717 SilcPacketContext *packet = parse_ctx->packet;
1718 SilcIDListData idata = (SilcIDListData)sock->user_data;
1721 SILC_LOG_DEBUG(("Start"));
1723 /* Parse the packet */
1724 if (parse_ctx->normal)
1725 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1727 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1729 /* If entry is disabled ignore what we got. */
1730 if (ret != SILC_PACKET_RESUME_ROUTER &&
1731 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1732 SILC_LOG_DEBUG(("Connection is disabled"));
1736 if (ret == SILC_PACKET_NONE)
1739 /* Check that the the current client ID is same as in the client's packet. */
1740 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1741 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1742 if (client && client->id) {
1743 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1744 packet->src_id_type);
1745 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1753 if (server->server_type == SILC_ROUTER) {
1754 /* Route the packet if it is not destined to us. Other ID types but
1755 server are handled separately after processing them. */
1756 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1757 packet->dst_id_type == SILC_ID_SERVER &&
1758 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1759 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1761 /* Route the packet to fastest route for the destination ID */
1762 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1763 packet->dst_id_type);
1766 silc_server_packet_route(server,
1767 silc_server_route_get(server, id,
1768 packet->dst_id_type),
1775 /* Parse the incoming packet type */
1776 silc_server_packet_parse_type(server, sock, packet);
1778 if (server->server_type == SILC_ROUTER) {
1779 /* Broadcast packet if it is marked as broadcast packet and it is
1780 originated from router and we are router. */
1781 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1782 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1783 !server->standalone) {
1784 /* Broadcast to our primary route */
1785 silc_server_packet_broadcast(server, server->router->connection, packet);
1787 /* If we have backup routers then we need to feed all broadcast
1788 data to those servers. */
1789 silc_server_backup_broadcast(server, sock, packet);
1794 silc_packet_context_free(packet);
1795 silc_free(parse_ctx);
1798 /* Parser callback called by silc_packet_receive_process. This merely
1799 registers timeout that will handle the actual parsing when appropriate. */
1801 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1804 SilcServer server = (SilcServer)context;
1805 SilcSocketConnection sock = parser_context->sock;
1806 SilcIDListData idata = (SilcIDListData)sock->user_data;
1809 idata->psn_receive = parser_context->packet->sequence + 1;
1811 /* If protocol for this connection is key exchange or rekey then we'll
1812 process all packets synchronously, since there might be packets in
1813 queue that we are not able to decrypt without first processing the
1814 packets before them. */
1815 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1816 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1817 (sock->protocol && sock->protocol->protocol &&
1818 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1819 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1820 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1823 /* Reprocess data since we'll return FALSE here. This is because
1824 the idata->receive_key might have become valid in the last packet
1825 and we want to call this processor with valid cipher. */
1827 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1828 TRUE : FALSE, idata->receive_key,
1829 idata->hmac_receive, idata->psn_receive,
1830 silc_server_packet_parse, server);
1832 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1833 TRUE : FALSE, NULL, NULL, 0,
1834 silc_server_packet_parse, server);
1838 switch (sock->type) {
1839 case SILC_SOCKET_TYPE_UNKNOWN:
1840 case SILC_SOCKET_TYPE_CLIENT:
1841 /* Parse the packet with timeout */
1842 silc_schedule_task_add(server->schedule, sock->sock,
1843 silc_server_packet_parse_real,
1844 (void *)parser_context, 0, 100000,
1846 SILC_TASK_PRI_NORMAL);
1848 case SILC_SOCKET_TYPE_SERVER:
1849 case SILC_SOCKET_TYPE_ROUTER:
1850 /* Packets from servers are parsed immediately */
1851 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1861 /* Parses the packet type and calls what ever routines the packet type
1862 requires. This is done for all incoming packets. */
1864 void silc_server_packet_parse_type(SilcServer server,
1865 SilcSocketConnection sock,
1866 SilcPacketContext *packet)
1868 SilcPacketType type = packet->type;
1869 SilcIDListData idata = (SilcIDListData)sock->user_data;
1871 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1873 /* Parse the packet type */
1875 case SILC_PACKET_DISCONNECT:
1876 SILC_LOG_DEBUG(("Disconnect packet"));
1877 if (packet->flags & SILC_PACKET_FLAG_LIST)
1881 case SILC_PACKET_SUCCESS:
1883 * Success received for something. For now we can have only
1884 * one protocol for connection executing at once hence this
1885 * success message is for whatever protocol is executing currently.
1887 SILC_LOG_DEBUG(("Success packet"));
1888 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1894 case SILC_PACKET_FAILURE:
1896 * Failure received for something. For now we can have only
1897 * one protocol for connection executing at once hence this
1898 * failure message is for whatever protocol is executing currently.
1900 SILC_LOG_DEBUG(("Failure packet"));
1901 if (packet->flags & SILC_PACKET_FLAG_LIST)
1903 if (sock->protocol) {
1904 SilcServerFailureContext f;
1905 f = silc_calloc(1, sizeof(*f));
1909 /* We will wait 5 seconds to process this failure packet */
1910 silc_schedule_task_add(server->schedule, sock->sock,
1911 silc_server_failure_callback, (void *)f, 5, 0,
1912 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1916 case SILC_PACKET_REJECT:
1917 SILC_LOG_DEBUG(("Reject packet"));
1918 if (packet->flags & SILC_PACKET_FLAG_LIST)
1923 case SILC_PACKET_NOTIFY:
1925 * Received notify packet. Server can receive notify packets from
1926 * router. Server then relays the notify messages to clients if needed.
1928 SILC_LOG_DEBUG(("Notify packet"));
1929 if (packet->flags & SILC_PACKET_FLAG_LIST)
1930 silc_server_notify_list(server, sock, packet);
1932 silc_server_notify(server, sock, packet);
1938 case SILC_PACKET_CHANNEL_MESSAGE:
1940 * Received channel message. Channel messages are special packets
1941 * (although probably most common ones) thus they are handled
1944 SILC_LOG_DEBUG(("Channel Message packet"));
1945 if (packet->flags & SILC_PACKET_FLAG_LIST)
1947 idata->last_receive = time(NULL);
1948 silc_server_channel_message(server, sock, packet);
1951 case SILC_PACKET_CHANNEL_KEY:
1953 * Received key for channel. As channels are created by the router
1954 * the keys are as well. We will distribute the key to all of our
1955 * locally connected clients on the particular channel. Router
1956 * never receives this channel and thus is ignored.
1958 SILC_LOG_DEBUG(("Channel Key packet"));
1959 if (packet->flags & SILC_PACKET_FLAG_LIST)
1961 silc_server_channel_key(server, sock, packet);
1967 case SILC_PACKET_COMMAND:
1969 * Recived command. Processes the command request and allocates the
1970 * command context and calls the command.
1972 SILC_LOG_DEBUG(("Command packet"));
1973 if (packet->flags & SILC_PACKET_FLAG_LIST)
1975 silc_server_command_process(server, sock, packet);
1978 case SILC_PACKET_COMMAND_REPLY:
1980 * Received command reply packet. Received command reply to command. It
1981 * may be reply to command sent by us or reply to command sent by client
1982 * that we've routed further.
1984 SILC_LOG_DEBUG(("Command Reply packet"));
1985 if (packet->flags & SILC_PACKET_FLAG_LIST)
1987 silc_server_command_reply(server, sock, packet);
1991 * Private Message packets
1993 case SILC_PACKET_PRIVATE_MESSAGE:
1995 * Received private message packet. The packet is coming from either
1998 SILC_LOG_DEBUG(("Private Message packet"));
1999 if (packet->flags & SILC_PACKET_FLAG_LIST)
2001 idata->last_receive = time(NULL);
2002 silc_server_private_message(server, sock, packet);
2005 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
2007 * Private message key packet.
2009 if (packet->flags & SILC_PACKET_FLAG_LIST)
2011 silc_server_private_message_key(server, sock, packet);
2015 * Key Exchange protocol packets
2017 case SILC_PACKET_KEY_EXCHANGE:
2018 SILC_LOG_DEBUG(("KE packet"));
2019 if (packet->flags & SILC_PACKET_FLAG_LIST)
2022 if (sock->protocol && sock->protocol->protocol &&
2023 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
2025 SilcServerKEInternalContext *proto_ctx =
2026 (SilcServerKEInternalContext *)sock->protocol->context;
2028 proto_ctx->packet = silc_packet_context_dup(packet);
2030 /* Let the protocol handle the packet */
2031 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2033 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2034 "protocol active, packet dropped."));
2038 case SILC_PACKET_KEY_EXCHANGE_1:
2039 SILC_LOG_DEBUG(("KE 1 packet"));
2040 if (packet->flags & SILC_PACKET_FLAG_LIST)
2043 if (sock->protocol && sock->protocol->protocol &&
2044 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2045 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2047 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2048 SilcServerRekeyInternalContext *proto_ctx =
2049 (SilcServerRekeyInternalContext *)sock->protocol->context;
2051 if (proto_ctx->packet)
2052 silc_packet_context_free(proto_ctx->packet);
2054 proto_ctx->packet = silc_packet_context_dup(packet);
2056 /* Let the protocol handle the packet */
2057 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2059 SilcServerKEInternalContext *proto_ctx =
2060 (SilcServerKEInternalContext *)sock->protocol->context;
2062 if (proto_ctx->packet)
2063 silc_packet_context_free(proto_ctx->packet);
2065 proto_ctx->packet = silc_packet_context_dup(packet);
2066 proto_ctx->dest_id_type = packet->src_id_type;
2067 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2068 packet->src_id_type);
2069 if (!proto_ctx->dest_id)
2072 /* Let the protocol handle the packet */
2073 silc_protocol_execute(sock->protocol, server->schedule,
2077 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2078 "protocol active, packet dropped."));
2082 case SILC_PACKET_KEY_EXCHANGE_2:
2083 SILC_LOG_DEBUG(("KE 2 packet"));
2084 if (packet->flags & SILC_PACKET_FLAG_LIST)
2087 if (sock->protocol && sock->protocol->protocol &&
2088 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2089 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2091 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2092 SilcServerRekeyInternalContext *proto_ctx =
2093 (SilcServerRekeyInternalContext *)sock->protocol->context;
2095 if (proto_ctx->packet)
2096 silc_packet_context_free(proto_ctx->packet);
2098 proto_ctx->packet = silc_packet_context_dup(packet);
2100 /* Let the protocol handle the packet */
2101 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2103 SilcServerKEInternalContext *proto_ctx =
2104 (SilcServerKEInternalContext *)sock->protocol->context;
2106 if (proto_ctx->packet)
2107 silc_packet_context_free(proto_ctx->packet);
2109 proto_ctx->packet = silc_packet_context_dup(packet);
2110 proto_ctx->dest_id_type = packet->src_id_type;
2111 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2112 packet->src_id_type);
2113 if (!proto_ctx->dest_id)
2116 /* Let the protocol handle the packet */
2117 silc_protocol_execute(sock->protocol, server->schedule,
2121 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2122 "protocol active, packet dropped."));
2126 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2128 * Connection authentication request packet. When we receive this packet
2129 * we will send to the other end information about our mandatory
2130 * authentication method for the connection. This packet maybe received
2133 SILC_LOG_DEBUG(("Connection authentication request packet"));
2134 if (packet->flags & SILC_PACKET_FLAG_LIST)
2136 silc_server_connection_auth_request(server, sock, packet);
2140 * Connection Authentication protocol packets
2142 case SILC_PACKET_CONNECTION_AUTH:
2143 /* Start of the authentication protocol. We receive here the
2144 authentication data and will verify it. */
2145 SILC_LOG_DEBUG(("Connection auth packet"));
2146 if (packet->flags & SILC_PACKET_FLAG_LIST)
2149 if (sock->protocol && sock->protocol->protocol->type
2150 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2152 SilcServerConnAuthInternalContext *proto_ctx =
2153 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2155 proto_ctx->packet = silc_packet_context_dup(packet);
2157 /* Let the protocol handle the packet */
2158 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2160 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2161 "protocol active, packet dropped."));
2165 case SILC_PACKET_NEW_ID:
2167 * Received New ID packet. This includes some new ID that has been
2168 * created. It may be for client, server or channel. This is the way
2169 * to distribute information about new registered entities in the
2172 SILC_LOG_DEBUG(("New ID packet"));
2173 if (packet->flags & SILC_PACKET_FLAG_LIST)
2174 silc_server_new_id_list(server, sock, packet);
2176 silc_server_new_id(server, sock, packet);
2179 case SILC_PACKET_NEW_CLIENT:
2181 * Received new client packet. This includes client information that
2182 * we will use to create initial client ID. After creating new
2183 * ID we will send it to the client.
2185 SILC_LOG_DEBUG(("New Client packet"));
2186 if (packet->flags & SILC_PACKET_FLAG_LIST)
2188 silc_server_new_client(server, sock, packet);
2191 case SILC_PACKET_NEW_SERVER:
2193 * Received new server packet. This includes Server ID and some other
2194 * information that we may save. This is received after server has
2197 SILC_LOG_DEBUG(("New Server packet"));
2198 if (packet->flags & SILC_PACKET_FLAG_LIST)
2200 silc_server_new_server(server, sock, packet);
2203 case SILC_PACKET_NEW_CHANNEL:
2205 * Received new channel packet. Information about new channel in the
2206 * network are distributed using this packet.
2208 SILC_LOG_DEBUG(("New Channel packet"));
2209 if (packet->flags & SILC_PACKET_FLAG_LIST)
2210 silc_server_new_channel_list(server, sock, packet);
2212 silc_server_new_channel(server, sock, packet);
2215 case SILC_PACKET_HEARTBEAT:
2217 * Received heartbeat.
2219 SILC_LOG_DEBUG(("Heartbeat packet"));
2220 if (packet->flags & SILC_PACKET_FLAG_LIST)
2224 case SILC_PACKET_KEY_AGREEMENT:
2226 * Received heartbeat.
2228 SILC_LOG_DEBUG(("Key agreement packet"));
2229 if (packet->flags & SILC_PACKET_FLAG_LIST)
2231 silc_server_key_agreement(server, sock, packet);
2234 case SILC_PACKET_REKEY:
2236 * Received re-key packet. The sender wants to regenerate the session
2239 SILC_LOG_DEBUG(("Re-key packet"));
2240 if (packet->flags & SILC_PACKET_FLAG_LIST)
2242 silc_server_rekey(server, sock, packet);
2245 case SILC_PACKET_REKEY_DONE:
2247 * The re-key is done.
2249 SILC_LOG_DEBUG(("Re-key done packet"));
2250 if (packet->flags & SILC_PACKET_FLAG_LIST)
2253 if (sock->protocol && sock->protocol->protocol &&
2254 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2256 SilcServerRekeyInternalContext *proto_ctx =
2257 (SilcServerRekeyInternalContext *)sock->protocol->context;
2259 if (proto_ctx->packet)
2260 silc_packet_context_free(proto_ctx->packet);
2262 proto_ctx->packet = silc_packet_context_dup(packet);
2264 /* Let the protocol handle the packet */
2265 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2267 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2268 "protocol active, packet dropped."));
2272 case SILC_PACKET_FTP:
2274 SILC_LOG_DEBUG(("FTP packet"));
2275 if (packet->flags & SILC_PACKET_FLAG_LIST)
2277 silc_server_ftp(server, sock, packet);
2280 case SILC_PACKET_RESUME_ROUTER:
2281 /* Resume router packet received. This packet is received for backup
2282 router resuming protocol. */
2283 SILC_LOG_DEBUG(("Resume router packet"));
2284 if (packet->flags & SILC_PACKET_FLAG_LIST)
2286 silc_server_backup_resume_router(server, sock, packet);
2290 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2296 /* Creates connection to a remote router. */
2298 void silc_server_create_connection(SilcServer server,
2299 const char *remote_host, SilcUInt32 port)
2301 SilcServerConnection sconn;
2303 /* Allocate connection object for hold connection specific stuff. */
2304 sconn = silc_calloc(1, sizeof(*sconn));
2305 sconn->server = server;
2306 sconn->remote_host = strdup(remote_host);
2307 sconn->remote_port = port;
2308 sconn->no_reconnect = TRUE;
2309 sconn->param = &server->config->param;
2311 silc_schedule_task_add(server->schedule, 0,
2312 silc_server_connect_router,
2313 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2314 SILC_TASK_PRI_NORMAL);
2317 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2319 silc_socket_free((SilcSocketConnection)context);
2322 /* Closes connection to socket connection */
2324 void silc_server_close_connection(SilcServer server,
2325 SilcSocketConnection sock)
2327 if (!server->sockets[sock->sock])
2330 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2332 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2333 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2334 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2337 /* We won't listen for this connection anymore */
2338 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2340 /* Unregister all tasks */
2341 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2343 /* Close the actual connection */
2344 silc_net_close_connection(sock->sock);
2345 server->sockets[sock->sock] = NULL;
2347 /* If sock->user_data is NULL then we'll check for active protocols
2348 here since the silc_server_free_sock_user_data has not been called
2349 for this connection. */
2350 if (!sock->user_data) {
2351 /* If any protocol is active cancel its execution. It will call
2352 the final callback which will finalize the disconnection. */
2353 if (sock->protocol) {
2354 silc_protocol_cancel(sock->protocol, server->schedule);
2355 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2356 silc_protocol_execute_final(sock->protocol, server->schedule);
2357 sock->protocol = NULL;
2362 silc_schedule_task_add(server->schedule, 0,
2363 silc_server_close_connection_final,
2364 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2365 SILC_TASK_PRI_NORMAL);
2368 /* Sends disconnect message to remote connection and disconnects the
2371 void silc_server_disconnect_remote(SilcServer server,
2372 SilcSocketConnection sock,
2373 const char *fmt, ...)
2376 unsigned char buf[4096];
2381 memset(buf, 0, sizeof(buf));
2383 vsprintf(buf, fmt, ap);
2386 SILC_LOG_DEBUG(("Disconnecting remote host"));
2388 /* Notify remote end that the conversation is over. The notify message
2389 is tried to be sent immediately. */
2390 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2391 buf, strlen(buf), TRUE);
2393 /* Mark the connection to be disconnected */
2394 SILC_SET_DISCONNECTED(sock);
2395 silc_server_close_connection(server, sock);
2400 SilcClientEntry client;
2401 } *FreeClientInternal;
2403 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2405 FreeClientInternal i = (FreeClientInternal)context;
2407 silc_idlist_del_data(i->client);
2408 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2412 /* Frees client data and notifies about client's signoff. */
2414 void silc_server_free_client_data(SilcServer server,
2415 SilcSocketConnection sock,
2416 SilcClientEntry client,
2418 const char *signoff)
2420 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2422 /* If there is pending outgoing data for the client then purge it
2423 to the network before removing the client entry. */
2424 silc_server_packet_queue_purge(server, sock);
2429 /* Send SIGNOFF notify to routers. */
2430 if (notify && !server->standalone && server->router)
2431 silc_server_send_notify_signoff(server, server->router->connection,
2432 server->server_type == SILC_SERVER ?
2433 FALSE : TRUE, client->id, signoff);
2435 /* Remove client from all channels */
2437 silc_server_remove_from_channels(server, NULL, client,
2438 TRUE, (char *)signoff, TRUE);
2440 silc_server_remove_from_channels(server, NULL, client,
2441 FALSE, NULL, FALSE);
2443 /* Update statistics */
2444 server->stat.my_clients--;
2445 server->stat.clients--;
2446 if (server->server_type == SILC_ROUTER)
2447 server->stat.cell_clients--;
2448 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2449 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2451 /* We will not delete the client entry right away. We will take it
2452 into history (for WHOWAS command) for 5 minutes */
2455 silc_schedule_task_add(server->schedule, 0,
2456 silc_server_free_client_data_timeout,
2458 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2459 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2460 client->router = NULL;
2461 client->connection = NULL;
2465 /* Frees user_data pointer from socket connection object. This also sends
2466 appropriate notify packets to the network to inform about leaving
2469 void silc_server_free_sock_user_data(SilcServer server,
2470 SilcSocketConnection sock,
2471 const char *signoff_message)
2473 SILC_LOG_DEBUG(("Start"));
2475 switch (sock->type) {
2476 case SILC_SOCKET_TYPE_CLIENT:
2478 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2479 silc_server_free_client_data(server, sock, user_data, TRUE,
2483 case SILC_SOCKET_TYPE_SERVER:
2484 case SILC_SOCKET_TYPE_ROUTER:
2486 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2487 SilcServerEntry backup_router = NULL;
2490 backup_router = silc_server_backup_get(server, user_data->id);
2492 /* If this was our primary router connection then we're lost to
2493 the outside world. */
2494 if (server->router == user_data) {
2495 /* Check whether we have a backup router connection */
2496 if (!backup_router || backup_router == user_data) {
2497 silc_schedule_task_add(server->schedule, 0,
2498 silc_server_connect_to_router,
2501 SILC_TASK_PRI_NORMAL);
2503 server->id_entry->router = NULL;
2504 server->router = NULL;
2505 server->standalone = TRUE;
2506 backup_router = NULL;
2508 SILC_LOG_INFO(("New primary router is backup router %s",
2509 backup_router->server_name));
2510 SILC_LOG_DEBUG(("New primary router is backup router %s",
2511 backup_router->server_name));
2512 server->id_entry->router = backup_router;
2513 server->router = backup_router;
2514 server->router_connect = time(0);
2515 server->backup_primary = TRUE;
2516 if (server->server_type == SILC_BACKUP_ROUTER) {
2517 server->server_type = SILC_ROUTER;
2519 /* We'll need to constantly try to reconnect to the primary
2520 router so that we'll see when it comes back online. */
2521 silc_server_backup_reconnect(server, sock->ip, sock->port,
2522 silc_server_backup_connected,
2526 /* Mark this connection as replaced */
2527 silc_server_backup_replaced_add(server, user_data->id,
2530 } else if (backup_router) {
2531 SILC_LOG_INFO(("Enabling the use of backup router %s",
2532 backup_router->server_name));
2533 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2534 backup_router->server_name));
2536 /* Mark this connection as replaced */
2537 silc_server_backup_replaced_add(server, user_data->id,
2541 if (!backup_router) {
2542 /* Free all client entries that this server owns as they will
2543 become invalid now as well. */
2545 silc_server_remove_clients_by_server(server, user_data, TRUE);
2546 if (server->server_type == SILC_SERVER)
2547 silc_server_remove_channels_by_server(server, user_data);
2549 /* Update the client entries of this server to the new backup
2550 router. This also removes the clients that *really* was owned
2551 by the primary router and went down with the router. */
2552 silc_server_update_clients_by_server(server, user_data, backup_router,
2554 silc_server_update_servers_by_server(server, user_data, backup_router);
2555 if (server->server_type == SILC_SERVER)
2556 silc_server_update_channels_by_server(server, user_data,
2560 /* Free the server entry */
2561 silc_server_backup_del(server, user_data);
2562 silc_server_backup_replaced_del(server, user_data);
2563 silc_idlist_del_data(user_data);
2564 if (!silc_idlist_del_server(server->local_list, user_data))
2565 silc_idlist_del_server(server->global_list, user_data);
2566 server->stat.my_servers--;
2567 server->stat.servers--;
2568 if (server->server_type == SILC_ROUTER)
2569 server->stat.cell_servers--;
2571 if (backup_router) {
2572 /* Announce all of our stuff that was created about 5 minutes ago.
2573 The backup router knows all the other stuff already. */
2574 if (server->server_type == SILC_ROUTER)
2575 silc_server_announce_servers(server, FALSE, time(0) - 300,
2576 backup_router->connection);
2578 /* Announce our clients and channels to the router */
2579 silc_server_announce_clients(server, time(0) - 300,
2580 backup_router->connection);
2581 silc_server_announce_channels(server, time(0) - 300,
2582 backup_router->connection);
2588 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2590 silc_idlist_del_data(user_data);
2591 silc_free(user_data);
2596 /* If any protocol is active cancel its execution */
2597 if (sock->protocol) {
2598 silc_protocol_cancel(sock->protocol, server->schedule);
2599 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2600 silc_protocol_execute_final(sock->protocol, server->schedule);
2601 sock->protocol = NULL;
2604 sock->user_data = NULL;
2607 /* Removes client from all channels it has joined. This is used when client
2608 connection is disconnected. If the client on a channel is last, the
2609 channel is removed as well. This sends the SIGNOFF notify types. */
2611 void silc_server_remove_from_channels(SilcServer server,
2612 SilcSocketConnection sock,
2613 SilcClientEntry client,
2615 char *signoff_message,
2618 SilcChannelEntry channel;
2619 SilcChannelClientEntry chl;
2620 SilcHashTableList htl;
2623 SILC_LOG_DEBUG(("Start"));
2625 if (!client || !client->id)
2628 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2630 /* Remove the client from all channels. The client is removed from
2631 the channels' user list. */
2632 silc_hash_table_list(client->channels, &htl);
2633 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2634 channel = chl->channel;
2636 /* Remove channel from client's channel list */
2637 silc_hash_table_del(client->channels, channel);
2639 /* Remove channel if there is no users anymore */
2640 if (server->server_type == SILC_ROUTER &&
2641 silc_hash_table_count(channel->user_list) < 2) {
2643 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2644 if (silc_idlist_del_channel(server->local_list, channel))
2645 server->stat.my_channels--;
2647 silc_idlist_del_channel(server->global_list, channel);
2651 /* Remove client from channel's client list */
2652 silc_hash_table_del(channel->user_list, chl->client);
2653 channel->user_count--;
2655 /* If there is no global users on the channel anymore mark the channel
2656 as local channel. Do not check if the removed client is local client. */
2657 if (server->server_type != SILC_ROUTER && channel->global_users &&
2658 chl->client->router && !silc_server_channel_has_global(channel))
2659 channel->global_users = FALSE;
2662 server->stat.my_chanclients--;
2664 /* If there is not at least one local user on the channel then we don't
2665 need the channel entry anymore, we can remove it safely. */
2666 if (server->server_type != SILC_ROUTER &&
2667 !silc_server_channel_has_local(channel)) {
2668 /* Notify about leaving client if this channel has global users. */
2669 if (notify && channel->global_users)
2670 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2671 SILC_NOTIFY_TYPE_SIGNOFF,
2672 signoff_message ? 2 : 1,
2673 clidp->data, clidp->len,
2674 signoff_message, signoff_message ?
2675 strlen(signoff_message) : 0);
2678 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2680 if (channel->founder_key) {
2681 /* The founder auth data exists, do not remove the channel entry */
2682 SilcChannelClientEntry chl2;
2683 SilcHashTableList htl2;
2685 channel->disabled = TRUE;
2687 silc_hash_table_list(channel->user_list, &htl2);
2688 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2689 silc_hash_table_del(chl2->client->channels, channel);
2690 silc_hash_table_del(channel->user_list, chl2->client);
2691 channel->user_count--;
2694 silc_hash_table_list_reset(&htl2);
2698 /* Remove the channel entry */
2699 if (silc_idlist_del_channel(server->local_list, channel))
2700 server->stat.my_channels--;
2702 silc_idlist_del_channel(server->global_list, channel);
2706 /* Send notify to channel about client leaving SILC and thus
2707 the entire channel. */
2709 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2710 SILC_NOTIFY_TYPE_SIGNOFF,
2711 signoff_message ? 2 : 1,
2712 clidp->data, clidp->len,
2713 signoff_message, signoff_message ?
2714 strlen(signoff_message) : 0);
2716 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2717 /* Re-generate channel key */
2718 if (!silc_server_create_channel_key(server, channel, 0))
2721 /* Send the channel key to the channel. The key of course is not sent
2722 to the client who was removed from the channel. */
2723 silc_server_send_channel_key(server, client->connection, channel,
2724 server->server_type == SILC_ROUTER ?
2725 FALSE : !server->standalone);
2730 silc_hash_table_list_reset(&htl);
2731 silc_buffer_free(clidp);
2734 /* Removes client from one channel. This is used for example when client
2735 calls LEAVE command to remove itself from the channel. Returns TRUE
2736 if channel still exists and FALSE if the channel is removed when
2737 last client leaves the channel. If `notify' is FALSE notify messages
2740 int silc_server_remove_from_one_channel(SilcServer server,
2741 SilcSocketConnection sock,
2742 SilcChannelEntry channel,
2743 SilcClientEntry client,
2746 SilcChannelClientEntry chl;
2749 SILC_LOG_DEBUG(("Start"));
2751 /* Get the entry to the channel, if this client is not on the channel
2753 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2756 /* Remove the client from the channel. The client is removed from
2757 the channel's user list. */
2759 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2761 /* Remove channel from client's channel list */
2762 silc_hash_table_del(client->channels, chl->channel);
2764 /* Remove channel if there is no users anymore */
2765 if (server->server_type == SILC_ROUTER &&
2766 silc_hash_table_count(channel->user_list) < 2) {
2768 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2769 if (silc_idlist_del_channel(server->local_list, channel))
2770 server->stat.my_channels--;
2772 silc_idlist_del_channel(server->global_list, channel);
2773 silc_buffer_free(clidp);
2777 /* Remove client from channel's client list */
2778 silc_hash_table_del(channel->user_list, chl->client);
2779 channel->user_count--;
2781 /* If there is no global users on the channel anymore mark the channel
2782 as local channel. Do not check if the client is local client. */
2783 if (server->server_type != SILC_ROUTER && channel->global_users &&
2784 chl->client->router && !silc_server_channel_has_global(channel))
2785 channel->global_users = FALSE;
2788 server->stat.my_chanclients--;
2790 /* If there is not at least one local user on the channel then we don't
2791 need the channel entry anymore, we can remove it safely. */
2792 if (server->server_type != SILC_ROUTER &&
2793 !silc_server_channel_has_local(channel)) {
2794 /* Notify about leaving client if this channel has global users. */
2795 if (notify && channel->global_users)
2796 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2797 SILC_NOTIFY_TYPE_LEAVE, 1,
2798 clidp->data, clidp->len);
2800 silc_buffer_free(clidp);
2803 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2805 if (channel->founder_key) {
2806 /* The founder auth data exists, do not remove the channel entry */
2807 SilcChannelClientEntry chl2;
2808 SilcHashTableList htl2;
2810 channel->disabled = TRUE;
2812 silc_hash_table_list(channel->user_list, &htl2);
2813 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2814 silc_hash_table_del(chl2->client->channels, channel);
2815 silc_hash_table_del(channel->user_list, chl2->client);
2816 channel->user_count--;
2819 silc_hash_table_list_reset(&htl2);
2823 /* Remove the channel entry */
2824 if (silc_idlist_del_channel(server->local_list, channel))
2825 server->stat.my_channels--;
2827 silc_idlist_del_channel(server->global_list, channel);
2831 /* Send notify to channel about client leaving the channel */
2833 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2834 SILC_NOTIFY_TYPE_LEAVE, 1,
2835 clidp->data, clidp->len);
2837 silc_buffer_free(clidp);
2841 /* Timeout callback. This is called if connection is idle or for some
2842 other reason is not responding within some period of time. This
2843 disconnects the remote end. */
2845 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2847 SilcServer server = (SilcServer)context;
2848 SilcSocketConnection sock = server->sockets[fd];
2850 SILC_LOG_DEBUG(("Start"));
2855 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
2856 sock->hostname, sock->ip));
2858 /* If we have protocol active we must assure that we call the protocol's
2859 final callback so that all the memory is freed. */
2860 if (sock->protocol) {
2861 silc_protocol_cancel(sock->protocol, server->schedule);
2862 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2863 silc_protocol_execute_final(sock->protocol, server->schedule);
2864 sock->protocol = NULL;
2868 if (sock->user_data)
2869 silc_server_free_sock_user_data(server, sock, NULL);
2871 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2872 "Connection timeout");
2875 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2876 function may be used only by router. In real SILC network all channels
2877 are created by routers thus this function is never used by normal
2880 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2881 SilcServerID *router_id,
2887 SilcChannelID *channel_id;
2888 SilcChannelEntry entry;
2892 SILC_LOG_DEBUG(("Creating new channel"));
2895 cipher = SILC_DEFAULT_CIPHER;
2897 hmac = SILC_DEFAULT_HMAC;
2899 /* Allocate cipher */
2900 if (!silc_cipher_alloc(cipher, &key))
2904 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2905 silc_cipher_free(key);
2909 channel_name = strdup(channel_name);
2911 /* Create the channel ID */
2912 if (!silc_id_create_channel_id(server, router_id, server->rng,
2914 silc_free(channel_name);
2915 silc_cipher_free(key);
2916 silc_hmac_free(newhmac);
2920 /* Create the channel */
2921 entry = silc_idlist_add_channel(server->local_list, channel_name,
2922 SILC_CHANNEL_MODE_NONE, channel_id,
2923 NULL, key, newhmac, 0);
2925 silc_free(channel_name);
2926 silc_cipher_free(key);
2927 silc_hmac_free(newhmac);
2928 silc_free(channel_id);
2932 entry->cipher = strdup(cipher);
2933 entry->hmac_name = strdup(hmac);
2935 /* Now create the actual key material */
2936 if (!silc_server_create_channel_key(server, entry,
2937 silc_cipher_get_key_len(key) / 8)) {
2938 silc_idlist_del_channel(server->local_list, entry);
2942 /* Notify other routers about the new channel. We send the packet
2943 to our primary route. */
2944 if (broadcast && server->standalone == FALSE)
2945 silc_server_send_new_channel(server, server->router->connection, TRUE,
2946 channel_name, entry->id,
2947 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2950 server->stat.my_channels++;
2955 /* Same as above but creates the channel with Channel ID `channel_id. */
2958 silc_server_create_new_channel_with_id(SilcServer server,
2962 SilcChannelID *channel_id,
2965 SilcChannelEntry entry;
2969 SILC_LOG_DEBUG(("Creating new channel"));
2972 cipher = SILC_DEFAULT_CIPHER;
2974 hmac = SILC_DEFAULT_HMAC;
2976 /* Allocate cipher */
2977 if (!silc_cipher_alloc(cipher, &key))
2981 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2982 silc_cipher_free(key);
2986 channel_name = strdup(channel_name);
2988 /* Create the channel */
2989 entry = silc_idlist_add_channel(server->local_list, channel_name,
2990 SILC_CHANNEL_MODE_NONE, channel_id,
2991 NULL, key, newhmac, 0);
2993 silc_cipher_free(key);
2994 silc_hmac_free(newhmac);
2995 silc_free(channel_name);
2999 /* Now create the actual key material */
3000 if (!silc_server_create_channel_key(server, entry,
3001 silc_cipher_get_key_len(key) / 8)) {
3002 silc_idlist_del_channel(server->local_list, entry);
3006 /* Notify other routers about the new channel. We send the packet
3007 to our primary route. */
3008 if (broadcast && server->standalone == FALSE)
3009 silc_server_send_new_channel(server, server->router->connection, TRUE,
3010 channel_name, entry->id,
3011 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3014 server->stat.my_channels++;
3019 /* Channel's key re-key timeout callback. */
3021 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3023 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3024 SilcServer server = (SilcServer)rekey->context;
3028 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3031 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3034 /* Generates new channel key. This is used to create the initial channel key
3035 but also to re-generate new key for channel. If `key_len' is provided
3036 it is the bytes of the key length. */
3038 bool silc_server_create_channel_key(SilcServer server,
3039 SilcChannelEntry channel,
3043 unsigned char channel_key[32], hash[32];
3046 SILC_LOG_DEBUG(("Generating channel key"));
3048 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3049 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3053 if (!channel->channel_key)
3054 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3055 channel->channel_key = NULL;
3061 else if (channel->key_len)
3062 len = channel->key_len / 8;
3064 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3066 /* Create channel key */
3067 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3070 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3072 /* Remove old key if exists */
3074 memset(channel->key, 0, channel->key_len / 8);
3075 silc_free(channel->key);
3079 channel->key_len = len * 8;
3080 channel->key = silc_memdup(channel_key, len);
3081 memset(channel_key, 0, sizeof(channel_key));
3083 /* Generate HMAC key from the channel key data and set it */
3085 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3086 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3087 silc_hmac_set_key(channel->hmac, hash,
3088 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3089 memset(hash, 0, sizeof(hash));
3091 if (server->server_type == SILC_ROUTER) {
3092 if (!channel->rekey)
3093 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3094 channel->rekey->context = (void *)server;
3095 channel->rekey->channel = channel;
3096 channel->rekey->key_len = key_len;
3097 if (channel->rekey->task)
3098 silc_schedule_task_del(server->schedule, channel->rekey->task);
3100 channel->rekey->task =
3101 silc_schedule_task_add(server->schedule, 0,
3102 silc_server_channel_key_rekey,
3103 (void *)channel->rekey,
3104 server->config->channel_rekey_secs, 0,
3106 SILC_TASK_PRI_NORMAL);
3112 /* Saves the channel key found in the encoded `key_payload' buffer. This
3113 function is used when we receive Channel Key Payload and also when we're
3114 processing JOIN command reply. Returns entry to the channel. */
3116 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3117 SilcBuffer key_payload,
3118 SilcChannelEntry channel)
3120 SilcChannelKeyPayload payload = NULL;
3121 SilcChannelID *id = NULL;
3122 unsigned char *tmp, hash[32];
3126 SILC_LOG_DEBUG(("Start"));
3128 /* Decode channel key payload */
3129 payload = silc_channel_key_payload_parse(key_payload->data,
3132 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3137 /* Get the channel entry */
3140 /* Get channel ID */
3141 tmp = silc_channel_key_get_id(payload, &tmp_len);
3142 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3148 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3150 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3152 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3153 silc_id_render(id, SILC_ID_CHANNEL)));
3159 tmp = silc_channel_key_get_key(payload, &tmp_len);
3165 cipher = silc_channel_key_get_cipher(payload, NULL);
3171 /* Remove old key if exists */
3173 memset(channel->key, 0, channel->key_len / 8);
3174 silc_free(channel->key);
3175 silc_cipher_free(channel->channel_key);
3178 /* Create new cipher */
3179 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3180 channel->channel_key = NULL;
3185 if (channel->cipher)
3186 silc_free(channel->cipher);
3187 channel->cipher = strdup(cipher);
3190 channel->key_len = tmp_len * 8;
3191 channel->key = silc_memdup(tmp, tmp_len);
3192 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3194 /* Generate HMAC key from the channel key data and set it */
3196 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3197 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3198 silc_hmac_set_key(channel->hmac, hash,
3199 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3201 memset(hash, 0, sizeof(hash));
3202 memset(tmp, 0, tmp_len);
3204 if (server->server_type == SILC_ROUTER) {
3205 if (!channel->rekey)
3206 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3207 channel->rekey->context = (void *)server;
3208 channel->rekey->channel = channel;
3209 if (channel->rekey->task)
3210 silc_schedule_task_del(server->schedule, channel->rekey->task);
3212 channel->rekey->task =
3213 silc_schedule_task_add(server->schedule, 0,
3214 silc_server_channel_key_rekey,
3215 (void *)channel->rekey,
3216 server->config->channel_rekey_secs, 0,
3218 SILC_TASK_PRI_NORMAL);
3224 silc_channel_key_payload_free(payload);
3229 /* Heartbeat callback. This function is set as argument for the
3230 silc_socket_set_heartbeat function. The library will call this function
3231 at the set time interval. */
3233 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3236 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3238 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3240 /* Send the heartbeat */
3241 silc_server_send_heartbeat(hb->server, sock);
3244 /* Returns assembled of all servers in the given ID list. The packet's
3245 form is dictated by the New ID payload. */
3247 static void silc_server_announce_get_servers(SilcServer server,
3248 SilcServerEntry remote,
3250 SilcBuffer *servers,
3251 unsigned long creation_time)
3253 SilcIDCacheList list;
3254 SilcIDCacheEntry id_cache;
3255 SilcServerEntry entry;
3258 /* Go through all clients in the list */
3259 if (silc_idcache_get_all(id_list->servers, &list)) {
3260 if (silc_idcache_list_first(list, &id_cache)) {
3262 entry = (SilcServerEntry)id_cache->context;
3264 /* Do not announce the one we've sending our announcements and
3265 do not announce ourself. Also check the creation time if it's
3267 if ((entry == remote) || (entry == server->id_entry) ||
3268 (creation_time && entry->data.created < creation_time)) {
3269 if (!silc_idcache_list_next(list, &id_cache))
3274 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3276 *servers = silc_buffer_realloc(*servers,
3278 (*servers)->truelen + idp->len :
3280 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3281 silc_buffer_put(*servers, idp->data, idp->len);
3282 silc_buffer_pull(*servers, idp->len);
3283 silc_buffer_free(idp);
3285 if (!silc_idcache_list_next(list, &id_cache))
3290 silc_idcache_list_free(list);
3295 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3301 p = silc_notify_payload_encode(notify, argc, ap);
3307 /* This function is used by router to announce existing servers to our
3308 primary router when we've connected to it. If `creation_time' is non-zero
3309 then only the servers that has been created after the `creation_time'
3310 will be announced. */
3312 void silc_server_announce_servers(SilcServer server, bool global,
3313 unsigned long creation_time,
3314 SilcSocketConnection remote)
3316 SilcBuffer servers = NULL;
3318 SILC_LOG_DEBUG(("Announcing servers"));
3320 /* Get servers in local list */
3321 silc_server_announce_get_servers(server, remote->user_data,
3322 server->local_list, &servers,
3326 /* Get servers in global list */
3327 silc_server_announce_get_servers(server, remote->user_data,
3328 server->global_list, &servers,
3332 silc_buffer_push(servers, servers->data - servers->head);
3333 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3335 /* Send the packet */
3336 silc_server_packet_send(server, remote,
3337 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3338 servers->data, servers->len, TRUE);
3340 silc_buffer_free(servers);
3344 /* Returns assembled packet of all clients in the given ID list. The
3345 packet's form is dictated by the New ID Payload. */
3347 static void silc_server_announce_get_clients(SilcServer server,
3349 SilcBuffer *clients,
3351 unsigned long creation_time)
3353 SilcIDCacheList list;
3354 SilcIDCacheEntry id_cache;
3355 SilcClientEntry client;
3358 unsigned char mode[4];
3360 /* Go through all clients in the list */
3361 if (silc_idcache_get_all(id_list->clients, &list)) {
3362 if (silc_idcache_list_first(list, &id_cache)) {
3364 client = (SilcClientEntry)id_cache->context;
3366 if (creation_time && client->data.created < creation_time) {
3367 if (!silc_idcache_list_next(list, &id_cache))
3372 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3374 *clients = silc_buffer_realloc(*clients,
3376 (*clients)->truelen + idp->len :
3378 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3379 silc_buffer_put(*clients, idp->data, idp->len);
3380 silc_buffer_pull(*clients, idp->len);
3382 SILC_PUT32_MSB(client->mode, mode);
3383 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3384 2, idp->data, idp->len,
3386 *umodes = silc_buffer_realloc(*umodes,
3388 (*umodes)->truelen + tmp->len :
3390 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3391 silc_buffer_put(*umodes, tmp->data, tmp->len);
3392 silc_buffer_pull(*umodes, tmp->len);
3393 silc_buffer_free(tmp);
3395 silc_buffer_free(idp);
3397 if (!silc_idcache_list_next(list, &id_cache))
3402 silc_idcache_list_free(list);
3406 /* This function is used to announce our existing clients to our router
3407 when we've connected to it. If `creation_time' is non-zero then only
3408 the clients that has been created after the `creation_time' will be
3411 void silc_server_announce_clients(SilcServer server,
3412 unsigned long creation_time,
3413 SilcSocketConnection remote)
3415 SilcBuffer clients = NULL;
3416 SilcBuffer umodes = NULL;
3418 SILC_LOG_DEBUG(("Announcing clients"));
3420 /* Get clients in local list */
3421 silc_server_announce_get_clients(server, server->local_list,
3422 &clients, &umodes, creation_time);
3424 /* As router we announce our global list as well */
3425 if (server->server_type == SILC_ROUTER)
3426 silc_server_announce_get_clients(server, server->global_list,
3427 &clients, &umodes, creation_time);
3430 silc_buffer_push(clients, clients->data - clients->head);
3431 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3433 /* Send the packet */
3434 silc_server_packet_send(server, remote,
3435 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3436 clients->data, clients->len, TRUE);
3438 silc_buffer_free(clients);
3442 silc_buffer_push(umodes, umodes->data - umodes->head);
3443 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3445 /* Send the packet */
3446 silc_server_packet_send(server, remote,
3447 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3448 umodes->data, umodes->len, TRUE);
3450 silc_buffer_free(umodes);
3454 /* Returns channel's topic for announcing it */
3456 void silc_server_announce_get_channel_topic(SilcServer server,
3457 SilcChannelEntry channel,
3462 if (channel->topic) {
3463 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3464 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3465 chidp->data, chidp->len,
3467 strlen(channel->topic));
3468 silc_buffer_free(chidp);
3472 /* Returns assembled packets for channel users of the `channel'. */
3474 void silc_server_announce_get_channel_users(SilcServer server,
3475 SilcChannelEntry channel,
3476 SilcBuffer *channel_users,
3477 SilcBuffer *channel_users_modes)
3479 SilcChannelClientEntry chl;
3480 SilcHashTableList htl;
3481 SilcBuffer chidp, clidp;
3484 unsigned char mode[4];
3486 SILC_LOG_DEBUG(("Start"));
3488 /* Now find all users on the channel */
3489 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3490 silc_hash_table_list(channel->user_list, &htl);
3491 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3492 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3495 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3496 clidp->data, clidp->len,
3497 chidp->data, chidp->len);
3500 silc_buffer_realloc(*channel_users,
3502 (*channel_users)->truelen + len : len));
3503 silc_buffer_pull_tail(*channel_users,
3504 ((*channel_users)->end -
3505 (*channel_users)->data));
3507 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3508 silc_buffer_pull(*channel_users, len);
3509 silc_buffer_free(tmp);
3511 /* CUMODE notify for mode change on the channel */
3512 SILC_PUT32_MSB(chl->mode, mode);
3513 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3514 3, clidp->data, clidp->len,
3516 clidp->data, clidp->len);
3518 *channel_users_modes =
3519 silc_buffer_realloc(*channel_users_modes,
3520 (*channel_users_modes ?
3521 (*channel_users_modes)->truelen + len : len));
3522 silc_buffer_pull_tail(*channel_users_modes,
3523 ((*channel_users_modes)->end -
3524 (*channel_users_modes)->data));
3526 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3527 silc_buffer_pull(*channel_users_modes, len);
3528 silc_buffer_free(tmp);
3530 silc_buffer_free(clidp);
3532 silc_hash_table_list_reset(&htl);
3533 silc_buffer_free(chidp);
3536 /* Returns assembled packets for all channels and users on those channels
3537 from the given ID List. The packets are in the form dictated by the
3538 New Channel and New Channel User payloads. */
3540 void silc_server_announce_get_channels(SilcServer server,
3542 SilcBuffer *channels,
3543 SilcBuffer *channel_users,
3544 SilcBuffer **channel_users_modes,
3545 SilcUInt32 *channel_users_modes_c,
3546 SilcBuffer **channel_topics,
3547 SilcChannelID ***channel_ids,
3548 unsigned long creation_time)
3550 SilcIDCacheList list;
3551 SilcIDCacheEntry id_cache;
3552 SilcChannelEntry channel;
3555 SilcUInt16 name_len;
3557 int i = *channel_users_modes_c;
3560 SILC_LOG_DEBUG(("Start"));
3562 /* Go through all channels in the list */
3563 if (silc_idcache_get_all(id_list->channels, &list)) {
3564 if (silc_idcache_list_first(list, &id_cache)) {
3566 channel = (SilcChannelEntry)id_cache->context;
3568 if (creation_time && channel->created < creation_time)
3573 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3574 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3575 name_len = strlen(channel->channel_name);
3578 len = 4 + name_len + id_len + 4;
3580 silc_buffer_realloc(*channels,
3581 (*channels ? (*channels)->truelen +
3583 silc_buffer_pull_tail(*channels,
3584 ((*channels)->end - (*channels)->data));
3585 silc_buffer_format(*channels,
3586 SILC_STR_UI_SHORT(name_len),
3587 SILC_STR_UI_XNSTRING(channel->channel_name,
3589 SILC_STR_UI_SHORT(id_len),
3590 SILC_STR_UI_XNSTRING(cid, id_len),
3591 SILC_STR_UI_INT(channel->mode),
3593 silc_buffer_pull(*channels, len);
3596 /* Channel user modes */
3597 *channel_users_modes = silc_realloc(*channel_users_modes,
3598 sizeof(**channel_users_modes) *
3600 (*channel_users_modes)[i] = NULL;
3601 *channel_ids = silc_realloc(*channel_ids,
3602 sizeof(**channel_ids) * (i + 1));
3603 (*channel_ids)[i] = NULL;
3604 silc_server_announce_get_channel_users(server, channel,
3606 &(*channel_users_modes)[i]);
3607 (*channel_ids)[i] = channel->id;
3609 /* Channel's topic */
3610 *channel_topics = silc_realloc(*channel_topics,
3611 sizeof(**channel_topics) * (i + 1));
3612 (*channel_topics)[i] = NULL;
3613 silc_server_announce_get_channel_topic(server, channel,
3614 &(*channel_topics)[i]);
3617 if (!silc_idcache_list_next(list, &id_cache))
3621 *channel_users_modes_c += i;
3624 silc_idcache_list_free(list);
3628 /* This function is used to announce our existing channels to our router
3629 when we've connected to it. This also announces the users on the
3630 channels to the router. If the `creation_time' is non-zero only the
3631 channels that was created after the `creation_time' are announced.
3632 Note that the channel users are still announced even if the `creation_time'
3635 void silc_server_announce_channels(SilcServer server,
3636 unsigned long creation_time,
3637 SilcSocketConnection remote)
3639 SilcBuffer channels = NULL, channel_users = NULL;
3640 SilcBuffer *channel_users_modes = NULL;
3641 SilcBuffer *channel_topics = NULL;
3642 SilcUInt32 channel_users_modes_c = 0;
3643 SilcChannelID **channel_ids = NULL;
3645 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3647 /* Get channels and channel users in local list */
3648 silc_server_announce_get_channels(server, server->local_list,
3649 &channels, &channel_users,
3650 &channel_users_modes,
3651 &channel_users_modes_c,
3653 &channel_ids, creation_time);
3655 /* Get channels and channel users in global list */
3656 if (server->server_type != SILC_SERVER)
3657 silc_server_announce_get_channels(server, server->global_list,
3658 &channels, &channel_users,
3659 &channel_users_modes,
3660 &channel_users_modes_c,
3662 &channel_ids, creation_time);
3665 silc_buffer_push(channels, channels->data - channels->head);
3666 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3668 /* Send the packet */
3669 silc_server_packet_send(server, remote,
3670 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3671 channels->data, channels->len,
3674 silc_buffer_free(channels);
3677 if (channel_users) {
3678 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3679 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3680 channel_users->len);
3682 /* Send the packet */
3683 silc_server_packet_send(server, remote,
3684 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3685 channel_users->data, channel_users->len,
3688 silc_buffer_free(channel_users);
3691 if (channel_users_modes) {
3694 for (i = 0; i < channel_users_modes_c; i++) {
3695 if (!channel_users_modes[i])
3697 silc_buffer_push(channel_users_modes[i],
3698 channel_users_modes[i]->data -
3699 channel_users_modes[i]->head);
3700 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3701 channel_users_modes[i]->len);
3702 silc_server_packet_send_dest(server, remote,
3703 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3704 channel_ids[i], SILC_ID_CHANNEL,
3705 channel_users_modes[i]->data,
3706 channel_users_modes[i]->len,
3708 silc_buffer_free(channel_users_modes[i]);
3710 silc_free(channel_users_modes);
3713 if (channel_topics) {
3716 for (i = 0; i < channel_users_modes_c; i++) {
3717 if (!channel_topics[i])
3720 silc_buffer_push(channel_topics[i],
3721 channel_topics[i]->data -
3722 channel_topics[i]->head);
3723 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3724 channel_topics[i]->len);
3725 silc_server_packet_send_dest(server, remote,
3726 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3727 channel_ids[i], SILC_ID_CHANNEL,
3728 channel_topics[i]->data,
3729 channel_topics[i]->len,
3731 silc_buffer_free(channel_topics[i]);
3733 silc_free(channel_topics);
3736 silc_free(channel_ids);
3739 /* Failure timeout callback. If this is called then we will immediately
3740 process the received failure. We always process the failure with timeout
3741 since we do not want to blindly trust to received failure packets.
3742 This won't be called (the timeout is cancelled) if the failure was
3743 bogus (it is bogus if remote does not close the connection after sending
3746 SILC_TASK_CALLBACK(silc_server_failure_callback)
3748 SilcServerFailureContext f = (SilcServerFailureContext)context;
3750 if (f->sock->protocol) {
3751 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3752 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3758 /* Assembles user list and users mode list from the `channel'. */
3760 void silc_server_get_users_on_channel(SilcServer server,
3761 SilcChannelEntry channel,
3762 SilcBuffer *user_list,
3763 SilcBuffer *mode_list,
3764 SilcUInt32 *user_count)
3766 SilcChannelClientEntry chl;
3767 SilcHashTableList htl;
3768 SilcBuffer client_id_list;
3769 SilcBuffer client_mode_list;
3771 SilcUInt32 list_count = 0, len = 0;
3773 silc_hash_table_list(channel->user_list, &htl);
3774 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3775 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3776 silc_hash_table_list_reset(&htl);
3778 client_id_list = silc_buffer_alloc(len);
3780 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3781 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3782 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3784 silc_hash_table_list(channel->user_list, &htl);
3785 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3787 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3788 silc_buffer_put(client_id_list, idp->data, idp->len);
3789 silc_buffer_pull(client_id_list, idp->len);
3790 silc_buffer_free(idp);
3792 /* Client's mode on channel */
3793 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3794 silc_buffer_pull(client_mode_list, 4);
3798 silc_hash_table_list_reset(&htl);
3799 silc_buffer_push(client_id_list,
3800 client_id_list->data - client_id_list->head);
3801 silc_buffer_push(client_mode_list,
3802 client_mode_list->data - client_mode_list->head);
3804 *user_list = client_id_list;
3805 *mode_list = client_mode_list;
3806 *user_count = list_count;
3809 /* Saves users and their modes to the `channel'. */
3811 void silc_server_save_users_on_channel(SilcServer server,
3812 SilcSocketConnection sock,
3813 SilcChannelEntry channel,
3814 SilcClientID *noadd,
3815 SilcBuffer user_list,
3816 SilcBuffer mode_list,
3817 SilcUInt32 user_count)
3822 SilcClientID *client_id;
3823 SilcClientEntry client;
3824 SilcIDCacheEntry cache;
3827 SILC_LOG_DEBUG(("Start"));
3829 for (i = 0; i < user_count; i++) {
3831 SILC_GET16_MSB(idp_len, user_list->data + 2);
3833 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3834 silc_buffer_pull(user_list, idp_len);
3839 SILC_GET32_MSB(mode, mode_list->data);
3840 silc_buffer_pull(mode_list, 4);
3842 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3843 silc_free(client_id);
3849 /* Check if we have this client cached already. */
3850 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3851 server->server_type, &cache);
3853 client = silc_idlist_find_client_by_id(server->global_list,
3854 client_id, server->server_type,
3859 /* If router did not find such Client ID in its lists then this must
3860 be bogus client or some router in the net is buggy. */
3861 if (server->server_type == SILC_ROUTER) {
3862 silc_free(client_id);
3866 /* We don't have that client anywhere, add it. The client is added
3867 to global list since server didn't have it in the lists so it must be
3869 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3870 silc_id_dup(client_id, SILC_ID_CLIENT),
3871 sock->user_data, NULL, 0);
3873 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3874 silc_free(client_id);
3878 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3880 /* Found, if it is from global list we'll assure that we won't
3881 expire it now that the entry is on channel. */
3886 silc_free(client_id);
3888 if (!silc_server_client_on_channel(client, channel)) {
3889 /* Client was not on the channel, add it. */
3890 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3891 chl->client = client;
3893 chl->channel = channel;
3894 silc_hash_table_add(channel->user_list, chl->client, chl);
3895 silc_hash_table_add(client->channels, chl->channel, chl);
3896 channel->user_count++;
3901 /* Lookups route to the client indicated by the `id_data'. The connection
3902 object and internal data object is returned. Returns NULL if route
3903 could not be found to the client. If the `client_id' is specified then
3904 it is used and the `id_data' is ignored. */
3906 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3907 unsigned char *id_data,
3909 SilcClientID *client_id,
3910 SilcIDListData *idata)
3913 SilcClientEntry client;
3915 SILC_LOG_DEBUG(("Start"));
3917 /* Decode destination Client ID */
3919 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3921 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3925 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3928 /* If the destination belongs to our server we don't have to route
3929 the packet anywhere but to send it to the local destination. */
3930 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3934 /* If we are router and the client has router then the client is in
3935 our cell but not directly connected to us. */
3936 if (server->server_type == SILC_ROUTER && client->router) {
3937 /* We are of course in this case the client's router thus the route
3938 to the client is the server who owns the client. So, we will send
3939 the packet to that server. */
3941 *idata = (SilcIDListData)client->router;
3942 return client->router->connection;
3945 /* Seems that client really is directly connected to us */
3947 *idata = (SilcIDListData)client;
3948 return client->connection;
3951 /* Destination belongs to someone not in this server. If we are normal
3952 server our action is to send the packet to our router. */
3953 if (server->server_type != SILC_ROUTER && !server->standalone) {
3956 *idata = (SilcIDListData)server->router;
3957 return server->router->connection;
3960 /* We are router and we will perform route lookup for the destination
3961 and send the packet to fastest route. */
3962 if (server->server_type == SILC_ROUTER && !server->standalone) {
3963 /* Check first that the ID is valid */
3964 client = silc_idlist_find_client_by_id(server->global_list, id,
3967 SilcSocketConnection dst_sock;
3969 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3973 *idata = (SilcIDListData)dst_sock->user_data;
3982 /* Encodes and returns channel list of channels the `client' has joined.
3983 Secret channels are not put to the list. */
3985 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3986 SilcClientEntry client)
3988 SilcBuffer buffer = NULL;
3989 SilcChannelEntry channel;
3990 SilcChannelClientEntry chl;
3991 SilcHashTableList htl;
3994 SilcUInt16 name_len;
3997 silc_hash_table_list(client->channels, &htl);
3998 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3999 channel = chl->channel;
4001 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
4002 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
4005 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
4006 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
4007 name_len = strlen(channel->channel_name);
4009 len = 4 + name_len + id_len + 4;
4010 buffer = silc_buffer_realloc(buffer,
4011 (buffer ? (buffer)->truelen + len : len));
4012 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
4013 silc_buffer_format(buffer,
4014 SILC_STR_UI_SHORT(name_len),
4015 SILC_STR_UI_XNSTRING(channel->channel_name,
4017 SILC_STR_UI_SHORT(id_len),
4018 SILC_STR_UI_XNSTRING(cid, id_len),
4019 SILC_STR_UI_INT(chl->mode), /* Client's mode */
4021 silc_buffer_pull(buffer, len);
4024 silc_hash_table_list_reset(&htl);
4027 silc_buffer_push(buffer, buffer->data - buffer->head);
4032 /* Finds client entry by Client ID and if it is not found then resolves
4033 it using WHOIS command. */
4035 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4036 SilcClientID *client_id,
4039 SilcClientEntry client;
4044 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4047 client = silc_idlist_find_client_by_id(server->global_list,
4048 client_id, TRUE, NULL);
4049 if (!client && server->server_type == SILC_ROUTER)
4053 if (!client && server->standalone)
4056 if (!client || !client->nickname || !client->username) {
4057 SilcBuffer buffer, idp;
4059 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4060 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4061 client->resolve_cmd_ident = ++server->cmd_ident;
4063 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4064 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4065 server->cmd_ident, 1,
4066 3, idp->data, idp->len);
4067 silc_server_packet_send(server, client ? client->router->connection :
4068 server->router->connection,
4069 SILC_PACKET_COMMAND, 0,
4070 buffer->data, buffer->len, FALSE);
4071 silc_buffer_free(idp);
4072 silc_buffer_free(buffer);
4083 /* A timeout callback for the re-key. We will be the initiator of the
4086 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4088 SilcSocketConnection sock = (SilcSocketConnection)context;
4089 SilcIDListData idata = (SilcIDListData)sock->user_data;
4090 SilcServer server = (SilcServer)idata->rekey->context;
4091 SilcProtocol protocol;
4092 SilcServerRekeyInternalContext *proto_ctx;
4094 SILC_LOG_DEBUG(("Start"));
4096 /* Allocate internal protocol context. This is sent as context
4098 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4099 proto_ctx->server = (void *)server;
4100 proto_ctx->sock = sock;
4101 proto_ctx->responder = FALSE;
4102 proto_ctx->pfs = idata->rekey->pfs;
4104 /* Perform rekey protocol. Will call the final callback after the
4105 protocol is over. */
4106 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4107 &protocol, proto_ctx, silc_server_rekey_final);
4108 sock->protocol = protocol;
4110 /* Run the protocol */
4111 silc_protocol_execute(protocol, server->schedule, 0, 0);
4113 /* Re-register re-key timeout */
4114 silc_schedule_task_add(server->schedule, sock->sock,
4115 silc_server_rekey_callback,
4116 context, idata->rekey->timeout, 0,
4117 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4120 /* The final callback for the REKEY protocol. This will actually take the
4121 new key material into use. */
4123 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4125 SilcProtocol protocol = (SilcProtocol)context;
4126 SilcServerRekeyInternalContext *ctx =
4127 (SilcServerRekeyInternalContext *)protocol->context;
4128 SilcServer server = (SilcServer)ctx->server;
4129 SilcSocketConnection sock = ctx->sock;
4131 SILC_LOG_DEBUG(("Start"));
4133 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4134 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4135 /* Error occured during protocol */
4136 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4137 silc_protocol_cancel(protocol, server->schedule);
4138 silc_protocol_free(protocol);
4139 sock->protocol = NULL;
4141 silc_packet_context_free(ctx->packet);
4143 silc_ske_free(ctx->ske);
4148 /* Purge the outgoing data queue to assure that all rekey packets really
4149 go to the network before we quit the protocol. */
4150 silc_server_packet_queue_purge(server, sock);
4153 silc_protocol_free(protocol);
4154 sock->protocol = NULL;
4156 silc_packet_context_free(ctx->packet);
4158 silc_ske_free(ctx->ske);