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)
79 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
80 silc_dlist_del(server->sim, sim);
83 silc_dlist_uninit(server->sim);
87 silc_rng_free(server->rng);
89 silc_pkcs_free(server->pkcs);
90 if (server->pending_commands)
91 silc_dlist_uninit(server->pending_commands);
93 silc_idlist_del_server(server->local_list, server->id_entry);
95 silc_idcache_free(server->local_list->clients);
96 silc_idcache_free(server->local_list->servers);
97 silc_idcache_free(server->local_list->channels);
98 silc_idcache_free(server->global_list->clients);
99 silc_idcache_free(server->global_list->servers);
100 silc_idcache_free(server->global_list->channels);
102 silc_free(server->sockets);
107 /* Initializes the entire SILC server. This is called always before running
108 the server. This is called only once at the initialization of the program.
109 This binds the server to its listenning port. After this function returns
110 one should call silc_server_run to start the server. This returns TRUE
111 when everything is ok to run the server. Configuration file must be
112 read and parsed before calling this. */
114 int silc_server_init(SilcServer server)
118 SilcServerEntry id_entry;
119 SilcIDListPurge purge;
121 SILC_LOG_DEBUG(("Initializing server"));
123 assert(server->config);
125 /* Set public and private keys */
126 if (!server->config->server_info ||
127 !server->config->server_info->public_key ||
128 !server->config->server_info->private_key) {
129 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
132 server->public_key = server->config->server_info->public_key;
133 server->private_key = server->config->server_info->private_key;
135 /* Set default to configuration parameters */
136 silc_server_config_set_defaults(server);
138 /* Register all configured ciphers, PKCS and hash functions. */
139 if (!silc_server_config_register_ciphers(server))
140 silc_cipher_register_default();
141 if (!silc_server_config_register_pkcs(server))
142 silc_pkcs_register_default();
143 if (!silc_server_config_register_hashfuncs(server))
144 silc_hash_register_default();
145 if (!silc_server_config_register_hmacs(server))
146 silc_hmac_register_default();
148 /* Initialize random number generator for the server. */
149 server->rng = silc_rng_alloc();
150 silc_rng_init(server->rng);
151 silc_rng_global_init(server->rng);
153 /* Initialize hash functions for server to use */
154 silc_hash_alloc("md5", &server->md5hash);
155 silc_hash_alloc("sha1", &server->sha1hash);
157 /* Allocate PKCS context for local public and private keys */
158 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
159 silc_pkcs_public_key_set(server->pkcs, server->public_key);
160 silc_pkcs_private_key_set(server->pkcs, server->private_key);
162 /* Create a listening server */
163 sock = silc_net_create_server(server->config->server_info->port,
164 server->config->server_info->server_ip);
166 SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
167 server->config->server_info->server_ip,
168 server->config->server_info->port));
172 /* Initialize ID caches */
173 server->local_list->clients =
174 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
175 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
176 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
178 /* These are allocated for normal server as well as these hold some
179 global information that the server has fetched from its router. For
180 router these are used as they are supposed to be used on router. */
181 server->global_list->clients =
182 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
183 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
184 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
186 /* Allocate the entire socket list that is used in server. Eventually
187 all connections will have entry in this table (it is a table of
188 pointers to the actual object that is allocated individually
190 server->sockets = silc_calloc(server->config->param.connections_max,
191 sizeof(*server->sockets));
194 SilcSocketConnection newsocket = NULL;
196 /* Set socket to non-blocking mode */
197 silc_net_set_socket_nonblock(sock);
200 /* Add ourselves also to the socket table. The entry allocated above
201 is sent as argument for fast referencing in the future. */
202 silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
203 server->sockets[sock] = newsocket;
205 /* Perform name and address lookups to resolve the listenning address
207 if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
209 if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
211 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
212 newsocket->hostname ? newsocket->hostname :
213 newsocket->ip ? newsocket->ip : ""));
214 server->stat.conn_failures++;
217 if (!newsocket->hostname)
218 newsocket->hostname = strdup(newsocket->ip);
220 newsocket->port = silc_net_get_local_port(sock);
222 /* Create a Server ID for the server. */
223 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
228 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
229 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
230 server->id_type = SILC_ID_SERVER;
231 server->server_name = server->config->server_info->server_name;
233 /* Add ourselves to the server list. We don't have a router yet
234 beacuse we haven't established a route yet. It will be done later.
235 For now, NULL is sent as router. This allocates new entry to
238 silc_idlist_add_server(server->local_list, strdup(server->server_name),
239 server->server_type, server->id, NULL, NULL);
241 SILC_LOG_ERROR(("Could not add ourselves to cache"));
244 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
246 /* Put the allocated socket pointer also to the entry allocated above
247 for fast back-referencing to the socket list. */
248 newsocket->user_data = (void *)id_entry;
249 id_entry->connection = (void *)newsocket;
250 server->id_entry = id_entry;
253 /* Register protocols */
254 silc_server_protocols_register();
256 /* Initialize the scheduler. */
257 server->schedule = silc_schedule_init(server->config->param.connections_max);
258 if (!server->schedule)
261 /* Add the first task to the scheduler. This is task that is executed by
262 timeout. It expires as soon as the caller calls silc_server_run. This
263 task performs authentication protocol and key exchange with our
265 silc_schedule_task_add(server->schedule, sock,
266 silc_server_connect_to_router,
267 (void *)server, 0, 1,
269 SILC_TASK_PRI_NORMAL);
271 /* Add listener task to the scheduler. This task receives new connections
272 to the server. This task remains on the queue until the end of the
274 silc_schedule_task_add(server->schedule, sock,
275 silc_server_accept_new_connection,
276 (void *)server, 0, 0,
278 SILC_TASK_PRI_NORMAL);
279 server->listenning = TRUE;
281 /* Send log file configuration */
282 silc_server_config_setlogfiles(server);
284 /* If server connections has been configured then we must be router as
285 normal server cannot have server connections, only router connections. */
286 if (server->config->servers) {
287 SilcServerConfigServer *ptr = server->config->servers;
289 server->server_type = SILC_ROUTER;
291 if (ptr->backup_router) {
292 server->server_type = SILC_BACKUP_ROUTER;
293 server->backup_router = TRUE;
294 server->id_entry->server_type = SILC_BACKUP_ROUTER;
301 /* Register the ID Cache purge task. This periodically purges the ID cache
302 and removes the expired cache entries. */
304 /* Clients local list */
305 purge = silc_calloc(1, sizeof(*purge));
306 purge->cache = server->local_list->clients;
307 purge->schedule = server->schedule;
308 purge->timeout = 600;
309 silc_schedule_task_add(purge->schedule, 0,
311 (void *)purge, purge->timeout, 0,
312 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
314 /* Clients global list */
315 purge = silc_calloc(1, sizeof(*purge));
316 purge->cache = server->global_list->clients;
317 purge->schedule = server->schedule;
318 purge->timeout = 300;
319 silc_schedule_task_add(purge->schedule, 0,
321 (void *)purge, purge->timeout, 0,
322 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
324 SILC_LOG_DEBUG(("Server initialized"));
326 /* We are done here, return succesfully */
330 silc_net_close_server(sock);
334 /* Fork server to background */
336 void silc_server_daemonise(SilcServer server)
340 SILC_LOG_DEBUG(("Forking SILC server to background"));
345 SILC_LOG_DEBUG(("fork() failed, cannot proceed"));
350 SILC_LOG_DEBUG(("Server started as user"));
352 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
358 /* Drop root privligies. If this cannot be done, die. */
360 void silc_server_drop(SilcServer server)
362 /* Are we executing silcd as root or a regular user? */
368 /* Get the values given for user and group in configuration file */
369 user = server->config->server_info->user;
370 group = server->config->server_info->group;
372 if (!user || !group) {
373 fprintf(stderr, "Error:" /* XXX update this error message */
374 "\tSILC server must not be run as root. For the security of your\n"
375 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
376 "\tuser account. Modify the [Identity] configuration section to run\n"
377 "\tthe server as non-root user.\n");
381 /* Check whether the user/group does not begin with a number */
382 if (isdigit(user[0]) || isdigit(group[0])) {
383 SILC_LOG_DEBUG(("User and/or group starts with a number"));
384 fprintf(stderr, "Invalid user and/or group information\n");
385 fprintf(stderr, "Please assign them as names, not numbers\n");
389 if (!(pw = getpwnam(user))) {
390 fprintf(stderr, "Error: No such user %s found.\n", user);
393 if (!(gr = getgrnam(group))) {
394 fprintf(stderr, "Error: No such group %s found.\n", group);
398 /* Check whether user and/or group is set to root. If yes, exit
399 immediately. Otherwise, setgid and setuid server to user.group */
400 if ((gr->gr_gid == 0) || (pw->pw_uid == 0)) {
401 fprintf(stderr, "Error:"
402 "\tSILC server must not be run as root. For the security of your\n"
403 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
404 "\tuser account. Modify the [Identity] configuration section to run\n"
405 "\tthe server as non-root user.\n");
409 SILC_LOG_DEBUG(("Changing to group %s (gid=%u)", group, gr->gr_gid));
410 if (setgid(gr->gr_gid) != 0) {
411 fprintf(stderr, "Error: Failed setgid() to %s (gid=%u). Exiting.\n",
415 #if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
416 SILC_LOG_DEBUG(("Removing supplementary groups"));
417 if (setgroups(0, NULL) != 0) {
418 fprintf(stderr, "Error: Failed setgroups() to NULL. Exiting.\n");
421 SILC_LOG_DEBUG(("Setting supplementary groups for user %s", user));
422 if (initgroups(user, gr->gr_gid) != 0) {
423 fprintf(stderr, "Error: Failed initgroups() for user %s (gid=%u). "
424 "Exiting.\n", user, gr->gr_gid);
428 SILC_LOG_DEBUG(("Changing to user %s (uid=%u)", user, pw->pw_uid));
429 if (setuid(pw->pw_uid) != 0) {
430 fprintf(stderr, "Error: Failed to setuid() to %s (gid=%u). Exiting.\n",
437 /* The heart of the server. This runs the scheduler thus runs the server.
438 When this returns the server has been stopped and the program will
441 void silc_server_run(SilcServer server)
443 SILC_LOG_DEBUG(("Running server"));
445 SILC_LOG_INFO(("SILC Server started"));
447 /* Start the scheduler, the heart of the SILC server. When this returns
448 the program will be terminated. */
449 silc_schedule(server->schedule);
452 /* Stops the SILC server. This function is used to shutdown the server.
453 This is usually called after the scheduler has returned. After stopping
454 the server one should call silc_server_free. */
456 void silc_server_stop(SilcServer server)
458 SILC_LOG_DEBUG(("Stopping server"));
460 if (server->schedule) {
461 silc_schedule_stop(server->schedule);
462 silc_schedule_uninit(server->schedule);
463 server->schedule = NULL;
466 silc_server_protocols_unregister();
468 SILC_LOG_DEBUG(("Server stopped"));
471 /* Function that is called when the network connection to a router has
472 been established. This will continue with the key exchange protocol
473 with the remote router. */
475 void silc_server_start_key_exchange(SilcServer server,
476 SilcServerConnection sconn,
479 SilcSocketConnection newsocket;
480 SilcProtocol protocol;
481 SilcServerKEInternalContext *proto_ctx;
482 SilcServerConfigRouter *conn = sconn->conn;
485 /* Cancel any possible retry timeouts */
486 silc_schedule_task_del_by_callback(server->schedule,
487 silc_server_connect_router);
489 /* Set socket options */
490 silc_net_set_socket_nonblock(sock);
491 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
493 /* Create socket connection for the connection. Even though we
494 know that we are connecting to a router we will mark the socket
495 to be unknown connection until we have executed authentication
497 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
498 server->sockets[sock] = newsocket;
499 newsocket->hostname = strdup(sconn->remote_host);
500 newsocket->ip = strdup(sconn->remote_host);
501 newsocket->port = sconn->remote_port;
502 sconn->sock = newsocket;
504 /* Allocate internal protocol context. This is sent as context
506 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
507 proto_ctx->server = (void *)server;
508 proto_ctx->context = (void *)sconn;
509 proto_ctx->sock = newsocket;
510 proto_ctx->rng = server->rng;
511 proto_ctx->responder = FALSE;
513 /* Set Key Exchange flags from configuration, but fall back to global
515 SILC_GET_SKE_FLAGS(conn, proto_ctx);
516 if (server->config->param.key_exchange_pfs)
517 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
519 /* Perform key exchange protocol. silc_server_connect_to_router_second
520 will be called after the protocol is finished. */
521 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
522 &protocol, proto_ctx,
523 silc_server_connect_to_router_second);
524 newsocket->protocol = protocol;
526 /* Register a timeout task that will be executed if the protocol
527 is not executed within set limit. */
528 proto_ctx->timeout_task =
529 silc_schedule_task_add(server->schedule, sock,
530 silc_server_timeout_remote,
531 server, server->config->key_exchange_timeout, 0,
535 /* Register the connection for network input and output. This sets
536 that scheduler will listen for incoming packets for this connection
537 and sets that outgoing packets may be sent to this connection as
538 well. However, this doesn't set the scheduler for outgoing traffic,
539 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
540 later when outgoing data is available. */
541 context = (void *)server;
542 SILC_REGISTER_CONNECTION_FOR_IO(sock);
544 /* Run the protocol */
545 silc_protocol_execute(protocol, server->schedule, 0, 0);
548 /* Timeout callback that will be called to retry connecting to remote
549 router. This is used by both normal and router server. This will wait
550 before retrying the connecting. The timeout is generated by exponential
551 backoff algorithm. */
553 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
555 SilcServerConnection sconn = (SilcServerConnection)context;
556 SilcServer server = sconn->server;
557 SilcServerConfigConnParams *param =
558 (sconn->param ? sconn->param : &server->config->param);
560 SILC_LOG_INFO(("Retrying connecting to a router"));
562 /* Calculate next timeout */
563 if (sconn->retry_count >= 1) {
564 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
565 if (sconn->retry_timeout > param->reconnect_interval_max)
566 sconn->retry_timeout = param->reconnect_interval_max;
568 sconn->retry_timeout = param->reconnect_interval;
570 sconn->retry_count++;
571 sconn->retry_timeout = sconn->retry_timeout +
572 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
574 /* If we've reached max retry count, give up. */
575 if (sconn->retry_count > param->reconnect_count &&
576 param->reconnect_keep_trying == FALSE) {
577 SILC_LOG_ERROR(("Could not connect to router, giving up"));
578 silc_free(sconn->remote_host);
583 /* Wait one before retrying */
584 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
585 context, sconn->retry_timeout, 0,
586 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
589 /* Generic routine to use connect to a router. */
591 SILC_TASK_CALLBACK(silc_server_connect_router)
593 SilcServerConnection sconn = (SilcServerConnection)context;
594 SilcServer server = sconn->server;
597 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
598 (sconn->backup ? "backup router" : "router"),
599 sconn->remote_host, sconn->remote_port));
601 server->router_connect = time(NULL);
603 /* Connect to remote host */
604 sock = silc_net_create_connection(server->config->server_info->server_ip,
608 SILC_LOG_ERROR(("Could not connect to router %s:%d",
609 sconn->remote_host, sconn->remote_port));
610 if (!sconn->no_reconnect)
611 silc_schedule_task_add(server->schedule, fd,
612 silc_server_connect_to_router_retry,
613 context, 0, 1, SILC_TASK_TIMEOUT,
614 SILC_TASK_PRI_NORMAL);
618 /* Continue with key exchange protocol */
619 silc_server_start_key_exchange(server, sconn, sock);
622 /* This function connects to our primary router or if we are a router this
623 establishes all our primary routes. This is called at the start of the
624 server to do authentication and key exchange with our router - called
627 SILC_TASK_CALLBACK(silc_server_connect_to_router)
629 SilcServer server = (SilcServer)context;
630 SilcServerConnection sconn;
631 SilcServerConfigRouter *ptr;
633 SILC_LOG_DEBUG(("Connecting to router(s)"));
635 if (server->server_type == SILC_SERVER) {
636 SILC_LOG_DEBUG(("We are normal server"));
637 } else if (server->server_type == SILC_ROUTER) {
638 SILC_LOG_DEBUG(("We are router"));
640 SILC_LOG_DEBUG(("We are backup router/normal server"));
643 /* Create the connections to all our routes */
644 ptr = server->config->routers;
647 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
648 ptr->backup_router ? "Backup router" : "Router",
649 ptr->initiator ? "Initiator" : "Responder",
650 ptr->host, ptr->port));
652 if (ptr->initiator) {
653 /* Allocate connection object for hold connection specific stuff. */
654 sconn = silc_calloc(1, sizeof(*sconn));
655 sconn->server = server;
656 sconn->remote_host = strdup(ptr->host);
657 sconn->remote_port = ptr->port;
658 sconn->backup = ptr->backup_router;
660 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
661 sconn->backup_replace_port = ptr->backup_replace_port;
664 if (!server->router_conn && !sconn->backup)
665 server->router_conn = sconn;
668 sconn->param = ptr->param;
670 silc_schedule_task_add(server->schedule, fd,
671 silc_server_connect_router,
672 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
673 SILC_TASK_PRI_NORMAL);
682 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
684 /* There wasn't a configured router, we will continue but we don't
685 have a connection to outside world. We will be standalone server. */
686 server->standalone = TRUE;
689 /* Second part of connecting to router(s). Key exchange protocol has been
690 executed and now we will execute authentication protocol. */
692 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
694 SilcProtocol protocol = (SilcProtocol)context;
695 SilcServerKEInternalContext *ctx =
696 (SilcServerKEInternalContext *)protocol->context;
697 SilcServer server = (SilcServer)ctx->server;
698 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
699 SilcSocketConnection sock = ctx->sock;
700 SilcServerConnAuthInternalContext *proto_ctx;
701 SilcServerConfigRouter *conn = NULL;
703 SILC_LOG_DEBUG(("Start"));
705 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
706 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
707 /* Error occured during protocol */
708 silc_protocol_free(protocol);
709 sock->protocol = NULL;
710 silc_ske_free_key_material(ctx->keymat);
712 silc_packet_context_free(ctx->packet);
714 silc_ske_free(ctx->ske);
715 silc_free(ctx->dest_id);
717 silc_schedule_task_del_by_callback(server->schedule,
718 silc_server_failure_callback);
719 silc_server_disconnect_remote(server, sock, "Server closed connection: "
720 "Key exchange failed");
724 /* We now have the key material as the result of the key exchange
725 protocol. Take the key material into use. Free the raw key material
726 as soon as we've set them into use. */
727 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
728 ctx->sock, ctx->keymat,
729 ctx->ske->prop->cipher,
730 ctx->ske->prop->pkcs,
731 ctx->ske->prop->hash,
732 ctx->ske->prop->hmac,
733 ctx->ske->prop->group,
735 silc_protocol_free(protocol);
736 sock->protocol = NULL;
737 silc_ske_free_key_material(ctx->keymat);
739 silc_packet_context_free(ctx->packet);
741 silc_ske_free(ctx->ske);
742 silc_free(ctx->dest_id);
744 silc_schedule_task_del_by_callback(server->schedule,
745 silc_server_failure_callback);
746 silc_server_disconnect_remote(server, sock, "Server closed connection: "
747 "Key exchange failed");
750 silc_ske_free_key_material(ctx->keymat);
752 /* Allocate internal context for the authentication protocol. This
753 is sent as context for the protocol. */
754 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
755 proto_ctx->server = (void *)server;
756 proto_ctx->context = (void *)sconn;
757 proto_ctx->sock = sock;
758 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
759 proto_ctx->dest_id_type = ctx->dest_id_type;
760 proto_ctx->dest_id = ctx->dest_id;
762 /* Resolve the authentication method used in this connection. Check if
763 we find a match from user configured connections */
765 conn = silc_server_config_find_router_conn(server, sock->hostname,
771 /* Match found. Use the configured authentication method. Take only
772 the passphrase, since for public key auth we automatically use
773 our local key pair. */
774 if (conn->passphrase) {
775 if (conn->publickeys && !server->config->prefer_passphrase_auth) {
776 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
778 proto_ctx->auth_data = strdup(conn->passphrase);
779 proto_ctx->auth_data_len = strlen(conn->passphrase);
780 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
782 } else if (conn->publickeys) {
783 proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
785 proto_ctx->auth_meth = SILC_AUTH_NONE;
788 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
789 sock->hostname, sock->ip, sock->port));
790 silc_protocol_free(protocol);
791 sock->protocol = NULL;
793 silc_packet_context_free(ctx->packet);
795 silc_ske_free(ctx->ske);
796 silc_free(ctx->dest_id);
798 silc_schedule_task_del_by_callback(server->schedule,
799 silc_server_failure_callback);
800 silc_server_disconnect_remote(server, sock, "Server closed connection: "
801 "Key exchange failed");
805 /* Free old protocol as it is finished now */
806 silc_protocol_free(protocol);
808 silc_packet_context_free(ctx->packet);
810 sock->protocol = NULL;
812 /* Allocate the authentication protocol. This is allocated here
813 but we won't start it yet. We will be receiving party of this
814 protocol thus we will wait that connecting party will make
816 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
817 &sock->protocol, proto_ctx,
818 silc_server_connect_to_router_final);
820 /* Register timeout task. If the protocol is not executed inside
821 this timelimit the connection will be terminated. */
822 proto_ctx->timeout_task =
823 silc_schedule_task_add(server->schedule, sock->sock,
824 silc_server_timeout_remote,
826 server->config->conn_auth_timeout, 0,
830 /* Run the protocol */
831 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
834 /* Finalizes the connection to router. Registers a server task to the
835 queue so that we can accept new connections. */
837 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
839 SilcProtocol protocol = (SilcProtocol)context;
840 SilcServerConnAuthInternalContext *ctx =
841 (SilcServerConnAuthInternalContext *)protocol->context;
842 SilcServer server = (SilcServer)ctx->server;
843 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
844 SilcSocketConnection sock = ctx->sock;
845 SilcServerEntry id_entry;
847 SilcServerHBContext hb_context;
848 unsigned char *id_string;
850 SilcIDListData idata;
851 SilcServerConfigConnParams *param;
853 SILC_LOG_DEBUG(("Start"));
855 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
856 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
857 /* Error occured during protocol */
858 silc_free(ctx->dest_id);
859 silc_server_disconnect_remote(server, sock, "Server closed connection: "
860 "Authentication failed");
864 /* Add a task to the queue. This task receives new connections to the
865 server. This task remains on the queue until the end of the program. */
866 if (!server->listenning && !sconn->backup) {
867 silc_schedule_task_add(server->schedule, server->sock,
868 silc_server_accept_new_connection,
869 (void *)server, 0, 0,
871 SILC_TASK_PRI_NORMAL);
872 server->listenning = TRUE;
875 /* Send NEW_SERVER packet to the router. We will become registered
876 to the SILC network after sending this packet. */
877 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
878 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
879 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
880 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
881 silc_buffer_format(packet,
882 SILC_STR_UI_SHORT(id_len),
883 SILC_STR_UI_XNSTRING(id_string, id_len),
884 SILC_STR_UI_SHORT(strlen(server->server_name)),
885 SILC_STR_UI_XNSTRING(server->server_name,
886 strlen(server->server_name)),
889 /* Send the packet */
890 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
891 packet->data, packet->len, TRUE);
892 silc_buffer_free(packet);
893 silc_free(id_string);
895 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
897 /* Check that we do not have this ID already */
898 id_entry = silc_idlist_find_server_by_id(server->local_list,
899 ctx->dest_id, TRUE, NULL);
901 silc_idcache_del_by_context(server->local_list->servers, id_entry);
903 id_entry = silc_idlist_find_server_by_id(server->global_list,
904 ctx->dest_id, TRUE, NULL);
906 silc_idcache_del_by_context(server->global_list->servers, id_entry);
909 SILC_LOG_DEBUG(("New server id(%s)",
910 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
912 /* Add the connected router to global server list */
913 id_entry = silc_idlist_add_server(server->global_list,
914 strdup(sock->hostname),
915 SILC_ROUTER, ctx->dest_id, NULL, sock);
917 silc_free(ctx->dest_id);
918 SILC_LOG_ERROR(("Cannot add new server entry to cache"));
919 silc_server_disconnect_remote(server, sock, "Server closed connection: "
920 "Authentication failed");
924 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
925 silc_free(sock->user_data);
926 sock->user_data = (void *)id_entry;
927 sock->type = SILC_SOCKET_TYPE_ROUTER;
928 idata = (SilcIDListData)sock->user_data;
929 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
931 param = (sconn->param ? sconn->param : &server->config->param);
933 /* Perform keepalive. The `hb_context' will be freed automatically
934 when finally calling the silc_socket_free function. */
935 hb_context = silc_calloc(1, sizeof(*hb_context));
936 hb_context->server = server;
937 silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
938 silc_server_perform_heartbeat,
941 /* Register re-key timeout */
942 idata->rekey->timeout = param->key_exchange_rekey;
943 idata->rekey->context = (void *)server;
944 silc_schedule_task_add(server->schedule, sock->sock,
945 silc_server_rekey_callback,
946 (void *)sock, idata->rekey->timeout, 0,
947 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
949 if (!sconn->backup) {
950 /* Mark this router our primary router if we're still standalone */
951 if (server->standalone) {
952 server->id_entry->router = id_entry;
953 server->router = id_entry;
954 server->standalone = FALSE;
956 /* If we are router then announce our possible servers. */
957 if (server->server_type == SILC_ROUTER)
958 silc_server_announce_servers(server, FALSE, 0,
959 server->router->connection);
961 /* Announce our clients and channels to the router */
962 silc_server_announce_clients(server, 0, server->router->connection);
963 silc_server_announce_channels(server, 0, server->router->connection);
966 /* Add this server to be our backup router */
967 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
968 sconn->backup_replace_port, FALSE);
971 sock->protocol = NULL;
973 /* Call the completion callback to indicate that we've connected to
976 (*sconn->callback)(server, id_entry, sconn->callback_context);
979 /* Free the temporary connection data context */
981 silc_free(sconn->remote_host);
982 silc_free(sconn->backup_replace_ip);
985 if (sconn == server->router_conn)
986 server->router_conn = NULL;
988 /* Free the protocol object */
989 if (sock->protocol == protocol)
990 sock->protocol = NULL;
991 silc_protocol_free(protocol);
993 silc_packet_context_free(ctx->packet);
995 silc_ske_free(ctx->ske);
996 if (ctx->auth_meth == SILC_AUTH_PASSWORD)
997 silc_free(ctx->auth_data);
1001 /* Host lookup callbcak that is called after the incoming connection's
1002 IP and FQDN lookup is performed. This will actually check the acceptance
1003 of the incoming connection and will register the key exchange protocol
1004 for this connection. */
1007 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1010 SilcServer server = (SilcServer)context;
1011 SilcServerKEInternalContext *proto_ctx;
1012 SilcServerConfigClient *cconfig = NULL;
1013 SilcServerConfigServer *sconfig = NULL;
1014 SilcServerConfigRouter *rconfig = NULL;
1015 SilcServerConfigDeny *deny;
1018 SILC_LOG_DEBUG(("Start"));
1020 /* Check whether we could resolve both IP and FQDN. */
1021 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1022 server->config->require_reverse_lookup)) {
1023 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1024 sock->hostname ? sock->hostname :
1025 sock->ip ? sock->ip : ""));
1026 server->stat.conn_failures++;
1027 silc_server_disconnect_remote(server, sock,
1028 "Server closed connection: Unknown host");
1032 /* Register the connection for network input and output. This sets
1033 that scheduler will listen for incoming packets for this connection
1034 and sets that outgoing packets may be sent to this connection as well.
1035 However, this doesn't set the scheduler for outgoing traffic, it
1036 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1037 later when outgoing data is available. */
1038 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1040 SILC_LOG_INFO(("Incoming connection %s (%s)", sock->hostname,
1043 port = server->sockets[server->sock]->port; /* Listenning port */
1045 /* Check whether this connection is denied to connect to us. */
1046 deny = silc_server_config_find_denied(server, sock->ip);
1048 deny = silc_server_config_find_denied(server, sock->hostname);
1050 /* The connection is denied */
1051 SILC_LOG_INFO(("Connection %s (%s) is denied",
1052 sock->hostname, sock->ip));
1053 silc_server_disconnect_remote(server, sock, deny->reason ?
1055 "Server closed connection: "
1056 "Connection refused");
1057 server->stat.conn_failures++;
1061 /* Check whether we have configred this sort of connection at all. We
1062 have to check all configurations since we don't know what type of
1063 connection this is. */
1064 if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
1065 cconfig = silc_server_config_find_client(server, sock->hostname);
1066 if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
1067 sconfig = silc_server_config_find_server_conn(server, sock->hostname);
1068 if (server->server_type == SILC_ROUTER) {
1069 if (!(rconfig = silc_server_config_find_router_conn(server,
1071 rconfig = silc_server_config_find_router_conn(server, sock->hostname,
1074 if (!cconfig && !sconfig && !rconfig) {
1075 SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
1077 silc_server_disconnect_remote(server, sock,
1078 "Server closed connection: "
1079 "Connection refused");
1080 server->stat.conn_failures++;
1084 /* The connection is allowed */
1086 /* Allocate internal context for key exchange protocol. This is
1087 sent as context for the protocol. */
1088 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1089 proto_ctx->server = context;
1090 proto_ctx->sock = sock;
1091 proto_ctx->rng = server->rng;
1092 proto_ctx->responder = TRUE;
1093 proto_ctx->cconfig = cconfig;
1094 proto_ctx->sconfig = sconfig;
1095 proto_ctx->rconfig = rconfig;
1097 /* Take flags for key exchange. Since we do not know what type of connection
1098 this is, we go through all found configuratios and use the global ones
1099 as well. This will result always into strictest key exchange flags. */
1100 SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
1101 SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
1102 SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
1103 if (server->config->param.key_exchange_pfs)
1104 proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
1106 /* Prepare the connection for key exchange protocol. We allocate the
1107 protocol but will not start it yet. The connector will be the
1108 initiator of the protocol thus we will wait for initiation from
1109 there before we start the protocol. */
1110 server->stat.auth_attempts++;
1111 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1112 &sock->protocol, proto_ctx,
1113 silc_server_accept_new_connection_second);
1115 /* Register a timeout task that will be executed if the connector
1116 will not start the key exchange protocol within specified timeout
1117 and the connection will be closed. */
1118 proto_ctx->timeout_task =
1119 silc_schedule_task_add(server->schedule, sock->sock,
1120 silc_server_timeout_remote,
1121 context, server->config->key_exchange_timeout, 0,
1126 /* Accepts new connections to the server. Accepting new connections are
1127 done in three parts to make it async. */
1129 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1131 SilcServer server = (SilcServer)context;
1132 SilcSocketConnection newsocket;
1135 SILC_LOG_DEBUG(("Accepting new connection"));
1137 server->stat.conn_attempts++;
1139 sock = silc_net_accept_connection(server->sock);
1141 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1142 server->stat.conn_failures++;
1146 /* Check for maximum allowed connections */
1147 if (sock > server->config->param.connections_max) {
1148 SILC_LOG_ERROR(("Refusing connection, server is full, try again later"));
1149 server->stat.conn_failures++;
1153 /* Set socket options */
1154 silc_net_set_socket_nonblock(sock);
1155 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1157 /* We don't create a ID yet, since we don't know what type of connection
1158 this is yet. But, we do add the connection to the socket table. */
1159 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1160 server->sockets[sock] = newsocket;
1162 /* Perform asynchronous host lookup. This will lookup the IP and the
1163 FQDN of the remote connection. After the lookup is done the connection
1164 is accepted further. */
1165 silc_socket_host_lookup(newsocket, TRUE,
1166 silc_server_accept_new_connection_lookup, context,
1170 /* Second part of accepting new connection. Key exchange protocol has been
1171 performed and now it is time to do little connection authentication
1172 protocol to figure out whether this connection is client or server
1173 and whether it has right to access this server (especially server
1174 connections needs to be authenticated). */
1176 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1178 SilcProtocol protocol = (SilcProtocol)context;
1179 SilcServerKEInternalContext *ctx =
1180 (SilcServerKEInternalContext *)protocol->context;
1181 SilcServer server = (SilcServer)ctx->server;
1182 SilcSocketConnection sock = ctx->sock;
1183 SilcServerConnAuthInternalContext *proto_ctx;
1185 SILC_LOG_DEBUG(("Start"));
1187 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1188 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1189 /* Error occured during protocol */
1190 silc_protocol_free(protocol);
1191 sock->protocol = NULL;
1192 silc_ske_free_key_material(ctx->keymat);
1194 silc_packet_context_free(ctx->packet);
1196 silc_ske_free(ctx->ske);
1197 silc_free(ctx->dest_id);
1199 silc_schedule_task_del_by_callback(server->schedule,
1200 silc_server_failure_callback);
1201 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1202 "Key exchange failed");
1203 server->stat.auth_failures++;
1207 /* We now have the key material as the result of the key exchange
1208 protocol. Take the key material into use. Free the raw key material
1209 as soon as we've set them into use. */
1210 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1211 ctx->sock, ctx->keymat,
1212 ctx->ske->prop->cipher,
1213 ctx->ske->prop->pkcs,
1214 ctx->ske->prop->hash,
1215 ctx->ske->prop->hmac,
1216 ctx->ske->prop->group,
1218 silc_protocol_free(protocol);
1219 sock->protocol = NULL;
1220 silc_ske_free_key_material(ctx->keymat);
1222 silc_packet_context_free(ctx->packet);
1224 silc_ske_free(ctx->ske);
1225 silc_free(ctx->dest_id);
1227 silc_schedule_task_del_by_callback(server->schedule,
1228 silc_server_failure_callback);
1229 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1230 "Key exchange failed");
1231 server->stat.auth_failures++;
1234 silc_ske_free_key_material(ctx->keymat);
1236 /* Allocate internal context for the authentication protocol. This
1237 is sent as context for the protocol. */
1238 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1239 proto_ctx->server = (void *)server;
1240 proto_ctx->sock = sock;
1241 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1242 proto_ctx->responder = TRUE;
1243 proto_ctx->dest_id_type = ctx->dest_id_type;
1244 proto_ctx->dest_id = ctx->dest_id;
1245 proto_ctx->cconfig = ctx->cconfig;
1246 proto_ctx->sconfig = ctx->sconfig;
1247 proto_ctx->rconfig = ctx->rconfig;
1249 /* Free old protocol as it is finished now */
1250 silc_protocol_free(protocol);
1252 silc_packet_context_free(ctx->packet);
1254 sock->protocol = NULL;
1256 /* Allocate the authentication protocol. This is allocated here
1257 but we won't start it yet. We will be receiving party of this
1258 protocol thus we will wait that connecting party will make
1259 their first move. */
1260 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1261 &sock->protocol, proto_ctx,
1262 silc_server_accept_new_connection_final);
1264 /* Register timeout task. If the protocol is not executed inside
1265 this timelimit the connection will be terminated. */
1266 proto_ctx->timeout_task =
1267 silc_schedule_task_add(server->schedule, sock->sock,
1268 silc_server_timeout_remote,
1270 server->config->conn_auth_timeout, 0,
1275 /* Final part of accepting new connection. The connection has now
1276 been authenticated and keys has been exchanged. We also know whether
1277 this is client or server connection. */
1279 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1281 SilcProtocol protocol = (SilcProtocol)context;
1282 SilcServerConnAuthInternalContext *ctx =
1283 (SilcServerConnAuthInternalContext *)protocol->context;
1284 SilcServer server = (SilcServer)ctx->server;
1285 SilcSocketConnection sock = ctx->sock;
1286 SilcServerHBContext hb_context;
1287 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1289 SilcUInt32 hearbeat_timeout = server->config->param.keepalive_secs;
1291 SILC_LOG_DEBUG(("Start"));
1293 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1294 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1295 /* Error occured during protocol */
1296 silc_protocol_free(protocol);
1297 sock->protocol = NULL;
1299 silc_packet_context_free(ctx->packet);
1301 silc_ske_free(ctx->ske);
1302 silc_free(ctx->dest_id);
1304 silc_schedule_task_del_by_callback(server->schedule,
1305 silc_server_failure_callback);
1306 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1307 "Authentication failed");
1308 server->stat.auth_failures++;
1312 entry->data.last_receive = time(NULL);
1314 switch (ctx->conn_type) {
1315 case SILC_SOCKET_TYPE_CLIENT:
1317 SilcClientEntry client;
1318 SilcServerConfigClient *conn = ctx->cconfig;
1320 /* Verify whether this connection is after all allowed to connect */
1321 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1322 &server->config->param,
1323 conn->param, ctx->ske)) {
1324 server->stat.auth_failures++;
1328 SILC_LOG_DEBUG(("Remote host is client"));
1329 SILC_LOG_INFO(("Connection %s (%s) is client", sock->hostname,
1332 /* Add the client to the client ID cache. The nickname and Client ID
1333 and other information is created after we have received NEW_CLIENT
1334 packet from client. */
1335 client = silc_idlist_add_client(server->local_list,
1336 NULL, NULL, NULL, NULL, NULL, sock, 0);
1338 SILC_LOG_ERROR(("Could not add new client to cache"));
1339 silc_free(sock->user_data);
1340 silc_server_disconnect_remote(server, sock,
1341 "Server closed connection: "
1342 "Authentication failed");
1343 server->stat.auth_failures++;
1348 server->stat.my_clients++;
1349 server->stat.clients++;
1350 if (server->server_type == SILC_ROUTER)
1351 server->stat.cell_clients++;
1353 /* Get connection parameters */
1355 if (conn->param->keepalive_secs)
1356 hearbeat_timeout = conn->param->keepalive_secs;
1359 id_entry = (void *)client;
1362 case SILC_SOCKET_TYPE_SERVER:
1363 case SILC_SOCKET_TYPE_ROUTER:
1365 SilcServerEntry new_server;
1366 bool initiator = FALSE;
1367 bool backup_local = FALSE;
1368 bool backup_router = FALSE;
1369 char *backup_replace_ip = NULL;
1370 SilcUInt16 backup_replace_port = 0;
1371 SilcServerConfigServer *sconn = ctx->sconfig;
1372 SilcServerConfigRouter *rconn = ctx->rconfig;
1374 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1375 /* Verify whether this connection is after all allowed to connect */
1376 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1377 &server->config->param,
1378 rconn ? rconn->param : NULL,
1380 server->stat.auth_failures++;
1386 if (rconn->param->keepalive_secs)
1387 hearbeat_timeout = rconn->param->keepalive_secs;
1390 initiator = rconn->initiator;
1391 backup_local = rconn->backup_local;
1392 backup_router = rconn->backup_router;
1393 backup_replace_ip = rconn->backup_replace_ip;
1394 backup_replace_port = rconn->backup_replace_port;
1398 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER) {
1399 /* Verify whether this connection is after all allowed to connect */
1400 if (!silc_server_connection_allowed(server, sock, ctx->conn_type,
1401 &server->config->param,
1402 sconn ? sconn->param : NULL,
1404 server->stat.auth_failures++;
1409 if (sconn->param->keepalive_secs)
1410 hearbeat_timeout = sconn->param->keepalive_secs;
1413 backup_router = sconn->backup_router;
1417 SILC_LOG_DEBUG(("Remote host is %s",
1418 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1419 "server" : (backup_router ?
1420 "backup router" : "router")));
1421 SILC_LOG_INFO(("Connection %s (%s) is %s", sock->hostname,
1422 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1423 "server" : (backup_router ?
1424 "backup router" : "router")));
1426 /* Add the server into server cache. The server name and Server ID
1427 is updated after we have received NEW_SERVER packet from the
1428 server. We mark ourselves as router for this server if we really
1431 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1432 server->local_list : (backup_router ?
1433 server->local_list :
1434 server->global_list)),
1436 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1437 SILC_SERVER : SILC_ROUTER),
1439 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1440 server->id_entry : (backup_router ?
1441 server->id_entry : NULL)),
1444 SILC_LOG_ERROR(("Could not add new server to cache"));
1445 silc_free(sock->user_data);
1446 silc_server_disconnect_remote(server, sock,
1447 "Server closed connection: "
1448 "Authentication failed");
1449 server->stat.auth_failures++;
1454 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1455 server->stat.my_servers++;
1457 server->stat.my_routers++;
1458 server->stat.servers++;
1460 id_entry = (void *)new_server;
1462 /* If the incoming connection is router and marked as backup router
1463 then add it to be one of our backups */
1464 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
1465 silc_server_backup_add(server, new_server, backup_replace_ip,
1466 backup_replace_port, backup_local);
1468 /* Change it back to SERVER type since that's what it really is. */
1470 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1472 new_server->server_type = SILC_BACKUP_ROUTER;
1475 /* Check whether this connection is to be our primary router connection
1476 if we do not already have the primary route. */
1477 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1478 if (silc_server_config_is_primary_route(server) && !initiator)
1481 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1482 server->standalone = FALSE;
1483 if (!server->id_entry->router) {
1484 server->id_entry->router = id_entry;
1485 server->router = id_entry;
1496 sock->type = ctx->conn_type;
1498 /* Add the common data structure to the ID entry. */
1499 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1501 /* Add to sockets internal pointer for fast referencing */
1502 silc_free(sock->user_data);
1503 sock->user_data = id_entry;
1505 /* Connection has been fully established now. Everything is ok. */
1506 SILC_LOG_DEBUG(("New connection authenticated"));
1508 /* Perform keepalive. The `hb_context' will be freed automatically
1509 when finally calling the silc_socket_free function. */
1510 hb_context = silc_calloc(1, sizeof(*hb_context));
1511 hb_context->server = server;
1512 silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
1513 silc_server_perform_heartbeat,
1517 silc_schedule_task_del_by_callback(server->schedule,
1518 silc_server_failure_callback);
1519 silc_protocol_free(protocol);
1521 silc_packet_context_free(ctx->packet);
1523 silc_ske_free(ctx->ske);
1524 silc_free(ctx->dest_id);
1526 sock->protocol = NULL;
1529 /* This function is used to read packets from network and send packets to
1530 network. This is usually a generic task. */
1532 SILC_TASK_CALLBACK(silc_server_packet_process)
1534 SilcServer server = (SilcServer)context;
1535 SilcSocketConnection sock = server->sockets[fd];
1536 SilcIDListData idata;
1537 SilcCipher cipher = NULL;
1538 SilcHmac hmac = NULL;
1539 SilcUInt32 sequence = 0;
1545 SILC_LOG_DEBUG(("Processing packet"));
1547 /* Packet sending */
1549 if (type == SILC_TASK_WRITE) {
1550 /* Do not send data to disconnected connection */
1551 if (SILC_IS_DISCONNECTED(sock))
1554 server->stat.packets_sent++;
1556 /* Send the packet */
1557 ret = silc_packet_send(sock, TRUE);
1559 /* If returned -2 could not write to connection now, will do
1565 SILC_LOG_ERROR(("Error sending packet to connection "
1566 "%s:%d [%s]", sock->hostname, sock->port,
1567 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1568 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1569 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1574 /* The packet has been sent and now it is time to set the connection
1575 back to only for input. When there is again some outgoing data
1576 available for this connection it will be set for output as well.
1577 This call clears the output setting and sets it only for input. */
1578 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1579 SILC_UNSET_OUTBUF_PENDING(sock);
1581 silc_buffer_clear(sock->outbuf);
1585 /* Packet receiving */
1587 /* Read some data from connection */
1588 ret = silc_packet_receive(sock);
1592 SILC_LOG_ERROR(("Error receiving packet from connection "
1593 "%s:%d [%s] %s", sock->hostname, sock->port,
1594 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1595 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1596 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1597 "Router"), strerror(errno)));
1603 SILC_LOG_DEBUG(("Read EOF"));
1605 /* If connection is disconnecting already we will finally
1606 close the connection */
1607 if (SILC_IS_DISCONNECTING(sock)) {
1608 if (sock->user_data)
1609 silc_server_free_sock_user_data(server, sock, NULL);
1610 silc_server_close_connection(server, sock);
1614 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1615 SILC_SET_DISCONNECTING(sock);
1617 if (sock->user_data) {
1619 if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
1620 silc_server_free_sock_user_data(server, sock, tmp);
1622 silc_server_free_sock_user_data(server, sock, NULL);
1623 } else if (server->router_conn && server->router_conn->sock == sock &&
1624 !server->router && server->standalone)
1625 silc_schedule_task_add(server->schedule, 0,
1626 silc_server_connect_to_router,
1629 SILC_TASK_PRI_NORMAL);
1631 silc_server_close_connection(server, sock);
1635 /* If connection is disconnecting or disconnected we will ignore
1637 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1638 SILC_LOG_DEBUG(("Ignoring read data from disconnected connection"));
1642 server->stat.packets_received++;
1644 /* Get keys and stuff from ID entry */
1645 idata = (SilcIDListData)sock->user_data;
1647 cipher = idata->receive_key;
1648 hmac = idata->hmac_receive;
1649 sequence = idata->psn_receive;
1652 /* Process the packet. This will call the parser that will then
1653 decrypt and parse the packet. */
1654 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1655 TRUE : FALSE, cipher, hmac, sequence,
1656 silc_server_packet_parse, server);
1658 /* If this socket connection is not authenticated yet and the packet
1659 processing failed we will drop the connection since it can be
1660 a malicious flooder. */
1661 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1662 (!sock->protocol || sock->protocol->protocol->type ==
1663 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1664 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1665 SILC_SET_DISCONNECTING(sock);
1667 if (sock->user_data)
1668 silc_server_free_sock_user_data(server, sock, NULL);
1669 silc_server_close_connection(server, sock);
1673 /* Parses whole packet, received earlier. */
1675 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1677 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1678 SilcServer server = (SilcServer)parse_ctx->context;
1679 SilcSocketConnection sock = parse_ctx->sock;
1680 SilcPacketContext *packet = parse_ctx->packet;
1681 SilcIDListData idata = (SilcIDListData)sock->user_data;
1684 SILC_LOG_DEBUG(("Start"));
1686 /* Parse the packet */
1687 if (parse_ctx->normal)
1688 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1690 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1692 /* If entry is disabled ignore what we got. */
1693 if (ret != SILC_PACKET_RESUME_ROUTER &&
1694 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1695 SILC_LOG_DEBUG(("Connection is disabled"));
1699 if (ret == SILC_PACKET_NONE)
1702 /* Check that the the current client ID is same as in the client's packet. */
1703 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1704 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1705 if (client && client->id) {
1706 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1707 packet->src_id_type);
1708 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1716 if (server->server_type == SILC_ROUTER) {
1717 /* Route the packet if it is not destined to us. Other ID types but
1718 server are handled separately after processing them. */
1719 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1720 packet->dst_id_type == SILC_ID_SERVER &&
1721 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1722 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1724 /* Route the packet to fastest route for the destination ID */
1725 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1726 packet->dst_id_type);
1729 silc_server_packet_route(server,
1730 silc_server_route_get(server, id,
1731 packet->dst_id_type),
1738 /* Parse the incoming packet type */
1739 silc_server_packet_parse_type(server, sock, packet);
1741 if (server->server_type == SILC_ROUTER) {
1742 /* Broadcast packet if it is marked as broadcast packet and it is
1743 originated from router and we are router. */
1744 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1745 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1746 !server->standalone) {
1747 /* Broadcast to our primary route */
1748 silc_server_packet_broadcast(server, server->router->connection, packet);
1750 /* If we have backup routers then we need to feed all broadcast
1751 data to those servers. */
1752 silc_server_backup_broadcast(server, sock, packet);
1757 silc_packet_context_free(packet);
1758 silc_free(parse_ctx);
1761 /* Parser callback called by silc_packet_receive_process. This merely
1762 registers timeout that will handle the actual parsing when appropriate. */
1764 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1767 SilcServer server = (SilcServer)context;
1768 SilcSocketConnection sock = parser_context->sock;
1769 SilcIDListData idata = (SilcIDListData)sock->user_data;
1772 idata->psn_receive = parser_context->packet->sequence + 1;
1774 /* If protocol for this connection is key exchange or rekey then we'll
1775 process all packets synchronously, since there might be packets in
1776 queue that we are not able to decrypt without first processing the
1777 packets before them. */
1778 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1779 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1780 (sock->protocol && sock->protocol->protocol &&
1781 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1782 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1783 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1786 /* Reprocess data since we'll return FALSE here. This is because
1787 the idata->receive_key might have become valid in the last packet
1788 and we want to call this processor with valid cipher. */
1790 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1791 TRUE : FALSE, idata->receive_key,
1792 idata->hmac_receive, idata->psn_receive,
1793 silc_server_packet_parse, server);
1795 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1796 TRUE : FALSE, NULL, NULL, 0,
1797 silc_server_packet_parse, server);
1801 switch (sock->type) {
1802 case SILC_SOCKET_TYPE_UNKNOWN:
1803 case SILC_SOCKET_TYPE_CLIENT:
1804 /* Parse the packet with timeout */
1805 silc_schedule_task_add(server->schedule, sock->sock,
1806 silc_server_packet_parse_real,
1807 (void *)parser_context, 0, 100000,
1809 SILC_TASK_PRI_NORMAL);
1811 case SILC_SOCKET_TYPE_SERVER:
1812 case SILC_SOCKET_TYPE_ROUTER:
1813 /* Packets from servers are parsed immediately */
1814 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1824 /* Parses the packet type and calls what ever routines the packet type
1825 requires. This is done for all incoming packets. */
1827 void silc_server_packet_parse_type(SilcServer server,
1828 SilcSocketConnection sock,
1829 SilcPacketContext *packet)
1831 SilcPacketType type = packet->type;
1832 SilcIDListData idata = (SilcIDListData)sock->user_data;
1834 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1836 /* Parse the packet type */
1838 case SILC_PACKET_DISCONNECT:
1839 SILC_LOG_DEBUG(("Disconnect packet"));
1840 if (packet->flags & SILC_PACKET_FLAG_LIST)
1842 if (silc_string_is_ascii(packet->buffer->data, packet->buffer->len)) {
1843 /* Duplicate to null terminate the string. */
1844 char *message = silc_memdup(packet->buffer->data, packet->buffer->len);
1845 SILC_LOG_ERROR(("%s", message));
1850 case SILC_PACKET_SUCCESS:
1852 * Success received for something. For now we can have only
1853 * one protocol for connection executing at once hence this
1854 * success message is for whatever protocol is executing currently.
1856 SILC_LOG_DEBUG(("Success packet"));
1857 if (packet->flags & SILC_PACKET_FLAG_LIST)
1860 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1863 case SILC_PACKET_FAILURE:
1865 * Failure received for something. For now we can have only
1866 * one protocol for connection executing at once hence this
1867 * failure message is for whatever protocol is executing currently.
1869 SILC_LOG_DEBUG(("Failure packet"));
1870 if (packet->flags & SILC_PACKET_FLAG_LIST)
1872 if (sock->protocol) {
1873 SilcServerFailureContext f;
1874 f = silc_calloc(1, sizeof(*f));
1878 /* We will wait 5 seconds to process this failure packet */
1879 silc_schedule_task_add(server->schedule, sock->sock,
1880 silc_server_failure_callback, (void *)f, 5, 0,
1881 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1885 case SILC_PACKET_REJECT:
1886 SILC_LOG_DEBUG(("Reject packet"));
1887 if (packet->flags & SILC_PACKET_FLAG_LIST)
1892 case SILC_PACKET_NOTIFY:
1894 * Received notify packet. Server can receive notify packets from
1895 * router. Server then relays the notify messages to clients if needed.
1897 SILC_LOG_DEBUG(("Notify packet"));
1898 if (packet->flags & SILC_PACKET_FLAG_LIST)
1899 silc_server_notify_list(server, sock, packet);
1901 silc_server_notify(server, sock, packet);
1907 case SILC_PACKET_CHANNEL_MESSAGE:
1909 * Received channel message. Channel messages are special packets
1910 * (although probably most common ones) thus they are handled
1913 SILC_LOG_DEBUG(("Channel Message packet"));
1914 if (packet->flags & SILC_PACKET_FLAG_LIST)
1916 idata->last_receive = time(NULL);
1917 silc_server_channel_message(server, sock, packet);
1920 case SILC_PACKET_CHANNEL_KEY:
1922 * Received key for channel. As channels are created by the router
1923 * the keys are as well. We will distribute the key to all of our
1924 * locally connected clients on the particular channel. Router
1925 * never receives this channel and thus is ignored.
1927 SILC_LOG_DEBUG(("Channel Key packet"));
1928 if (packet->flags & SILC_PACKET_FLAG_LIST)
1930 silc_server_channel_key(server, sock, packet);
1936 case SILC_PACKET_COMMAND:
1938 * Recived command. Processes the command request and allocates the
1939 * command context and calls the command.
1941 SILC_LOG_DEBUG(("Command packet"));
1942 if (packet->flags & SILC_PACKET_FLAG_LIST)
1944 silc_server_command_process(server, sock, packet);
1947 case SILC_PACKET_COMMAND_REPLY:
1949 * Received command reply packet. Received command reply to command. It
1950 * may be reply to command sent by us or reply to command sent by client
1951 * that we've routed further.
1953 SILC_LOG_DEBUG(("Command Reply packet"));
1954 if (packet->flags & SILC_PACKET_FLAG_LIST)
1956 silc_server_command_reply(server, sock, packet);
1960 * Private Message packets
1962 case SILC_PACKET_PRIVATE_MESSAGE:
1964 * Received private message packet. The packet is coming from either
1967 SILC_LOG_DEBUG(("Private Message packet"));
1968 if (packet->flags & SILC_PACKET_FLAG_LIST)
1970 idata->last_receive = time(NULL);
1971 silc_server_private_message(server, sock, packet);
1974 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1976 * Private message key packet.
1978 if (packet->flags & SILC_PACKET_FLAG_LIST)
1980 silc_server_private_message_key(server, sock, packet);
1984 * Key Exchange protocol packets
1986 case SILC_PACKET_KEY_EXCHANGE:
1987 SILC_LOG_DEBUG(("KE packet"));
1988 if (packet->flags & SILC_PACKET_FLAG_LIST)
1991 if (sock->protocol && sock->protocol->protocol &&
1992 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1994 SilcServerKEInternalContext *proto_ctx =
1995 (SilcServerKEInternalContext *)sock->protocol->context;
1997 proto_ctx->packet = silc_packet_context_dup(packet);
1999 /* Let the protocol handle the packet */
2000 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
2002 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
2003 "protocol active, packet dropped."));
2007 case SILC_PACKET_KEY_EXCHANGE_1:
2008 SILC_LOG_DEBUG(("KE 1 packet"));
2009 if (packet->flags & SILC_PACKET_FLAG_LIST)
2012 if (sock->protocol && sock->protocol->protocol &&
2013 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2014 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2016 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2017 SilcServerRekeyInternalContext *proto_ctx =
2018 (SilcServerRekeyInternalContext *)sock->protocol->context;
2020 if (proto_ctx->packet)
2021 silc_packet_context_free(proto_ctx->packet);
2023 proto_ctx->packet = silc_packet_context_dup(packet);
2025 /* Let the protocol handle the packet */
2026 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2028 SilcServerKEInternalContext *proto_ctx =
2029 (SilcServerKEInternalContext *)sock->protocol->context;
2031 if (proto_ctx->packet)
2032 silc_packet_context_free(proto_ctx->packet);
2034 proto_ctx->packet = silc_packet_context_dup(packet);
2035 proto_ctx->dest_id_type = packet->src_id_type;
2036 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2037 packet->src_id_type);
2038 if (!proto_ctx->dest_id)
2041 /* Let the protocol handle the packet */
2042 silc_protocol_execute(sock->protocol, server->schedule,
2046 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
2047 "protocol active, packet dropped."));
2051 case SILC_PACKET_KEY_EXCHANGE_2:
2052 SILC_LOG_DEBUG(("KE 2 packet"));
2053 if (packet->flags & SILC_PACKET_FLAG_LIST)
2056 if (sock->protocol && sock->protocol->protocol &&
2057 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
2058 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2060 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2061 SilcServerRekeyInternalContext *proto_ctx =
2062 (SilcServerRekeyInternalContext *)sock->protocol->context;
2064 if (proto_ctx->packet)
2065 silc_packet_context_free(proto_ctx->packet);
2067 proto_ctx->packet = silc_packet_context_dup(packet);
2069 /* Let the protocol handle the packet */
2070 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2072 SilcServerKEInternalContext *proto_ctx =
2073 (SilcServerKEInternalContext *)sock->protocol->context;
2075 if (proto_ctx->packet)
2076 silc_packet_context_free(proto_ctx->packet);
2078 proto_ctx->packet = silc_packet_context_dup(packet);
2079 proto_ctx->dest_id_type = packet->src_id_type;
2080 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2081 packet->src_id_type);
2082 if (!proto_ctx->dest_id)
2085 /* Let the protocol handle the packet */
2086 silc_protocol_execute(sock->protocol, server->schedule,
2090 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2091 "protocol active, packet dropped."));
2095 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2097 * Connection authentication request packet. When we receive this packet
2098 * we will send to the other end information about our mandatory
2099 * authentication method for the connection. This packet maybe received
2102 SILC_LOG_DEBUG(("Connection authentication request packet"));
2103 if (packet->flags & SILC_PACKET_FLAG_LIST)
2105 silc_server_connection_auth_request(server, sock, packet);
2109 * Connection Authentication protocol packets
2111 case SILC_PACKET_CONNECTION_AUTH:
2112 /* Start of the authentication protocol. We receive here the
2113 authentication data and will verify it. */
2114 SILC_LOG_DEBUG(("Connection auth packet"));
2115 if (packet->flags & SILC_PACKET_FLAG_LIST)
2118 if (sock->protocol && sock->protocol->protocol->type
2119 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2121 SilcServerConnAuthInternalContext *proto_ctx =
2122 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2124 proto_ctx->packet = silc_packet_context_dup(packet);
2126 /* Let the protocol handle the packet */
2127 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2129 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2130 "protocol active, packet dropped."));
2134 case SILC_PACKET_NEW_ID:
2136 * Received New ID packet. This includes some new ID that has been
2137 * created. It may be for client, server or channel. This is the way
2138 * to distribute information about new registered entities in the
2141 SILC_LOG_DEBUG(("New ID packet"));
2142 if (packet->flags & SILC_PACKET_FLAG_LIST)
2143 silc_server_new_id_list(server, sock, packet);
2145 silc_server_new_id(server, sock, packet);
2148 case SILC_PACKET_NEW_CLIENT:
2150 * Received new client packet. This includes client information that
2151 * we will use to create initial client ID. After creating new
2152 * ID we will send it to the client.
2154 SILC_LOG_DEBUG(("New Client packet"));
2155 if (packet->flags & SILC_PACKET_FLAG_LIST)
2157 silc_server_new_client(server, sock, packet);
2160 case SILC_PACKET_NEW_SERVER:
2162 * Received new server packet. This includes Server ID and some other
2163 * information that we may save. This is received after server has
2166 SILC_LOG_DEBUG(("New Server packet"));
2167 if (packet->flags & SILC_PACKET_FLAG_LIST)
2169 silc_server_new_server(server, sock, packet);
2172 case SILC_PACKET_NEW_CHANNEL:
2174 * Received new channel packet. Information about new channel in the
2175 * network are distributed using this packet.
2177 SILC_LOG_DEBUG(("New Channel packet"));
2178 if (packet->flags & SILC_PACKET_FLAG_LIST)
2179 silc_server_new_channel_list(server, sock, packet);
2181 silc_server_new_channel(server, sock, packet);
2184 case SILC_PACKET_HEARTBEAT:
2186 * Received heartbeat.
2188 SILC_LOG_DEBUG(("Heartbeat packet"));
2189 if (packet->flags & SILC_PACKET_FLAG_LIST)
2193 case SILC_PACKET_KEY_AGREEMENT:
2195 * Received heartbeat.
2197 SILC_LOG_DEBUG(("Key agreement packet"));
2198 if (packet->flags & SILC_PACKET_FLAG_LIST)
2200 silc_server_key_agreement(server, sock, packet);
2203 case SILC_PACKET_REKEY:
2205 * Received re-key packet. The sender wants to regenerate the session
2208 SILC_LOG_DEBUG(("Re-key packet"));
2209 if (packet->flags & SILC_PACKET_FLAG_LIST)
2211 silc_server_rekey(server, sock, packet);
2214 case SILC_PACKET_REKEY_DONE:
2216 * The re-key is done.
2218 SILC_LOG_DEBUG(("Re-key done packet"));
2219 if (packet->flags & SILC_PACKET_FLAG_LIST)
2222 if (sock->protocol && sock->protocol->protocol &&
2223 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2225 SilcServerRekeyInternalContext *proto_ctx =
2226 (SilcServerRekeyInternalContext *)sock->protocol->context;
2228 if (proto_ctx->packet)
2229 silc_packet_context_free(proto_ctx->packet);
2231 proto_ctx->packet = silc_packet_context_dup(packet);
2233 /* Let the protocol handle the packet */
2234 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2236 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2237 "protocol active, packet dropped."));
2241 case SILC_PACKET_FTP:
2243 SILC_LOG_DEBUG(("FTP packet"));
2244 if (packet->flags & SILC_PACKET_FLAG_LIST)
2246 silc_server_ftp(server, sock, packet);
2249 case SILC_PACKET_RESUME_ROUTER:
2250 /* Resume router packet received. This packet is received for backup
2251 router resuming protocol. */
2252 SILC_LOG_DEBUG(("Resume router packet"));
2253 if (packet->flags & SILC_PACKET_FLAG_LIST)
2255 silc_server_backup_resume_router(server, sock, packet);
2259 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2265 /* Creates connection to a remote router. */
2267 void silc_server_create_connection(SilcServer server,
2268 const char *remote_host, SilcUInt32 port)
2270 SilcServerConnection sconn;
2272 /* Allocate connection object for hold connection specific stuff. */
2273 sconn = silc_calloc(1, sizeof(*sconn));
2274 sconn->server = server;
2275 sconn->remote_host = strdup(remote_host);
2276 sconn->remote_port = port;
2277 sconn->no_reconnect = TRUE;
2278 sconn->param = &server->config->param;
2280 silc_schedule_task_add(server->schedule, 0,
2281 silc_server_connect_router,
2282 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2283 SILC_TASK_PRI_NORMAL);
2286 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2288 silc_socket_free((SilcSocketConnection)context);
2291 /* Closes connection to socket connection */
2293 void silc_server_close_connection(SilcServer server,
2294 SilcSocketConnection sock)
2296 if (!server->sockets[sock->sock])
2299 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2301 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2302 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2303 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2306 /* We won't listen for this connection anymore */
2307 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2309 /* Unregister all tasks */
2310 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2312 /* Close the actual connection */
2313 silc_net_close_connection(sock->sock);
2314 server->sockets[sock->sock] = NULL;
2316 /* If sock->user_data is NULL then we'll check for active protocols
2317 here since the silc_server_free_sock_user_data has not been called
2318 for this connection. */
2319 if (!sock->user_data) {
2320 /* If any protocol is active cancel its execution. It will call
2321 the final callback which will finalize the disconnection. */
2322 if (sock->protocol) {
2323 silc_protocol_cancel(sock->protocol, server->schedule);
2324 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2325 silc_protocol_execute_final(sock->protocol, server->schedule);
2326 sock->protocol = NULL;
2331 silc_schedule_task_add(server->schedule, 0,
2332 silc_server_close_connection_final,
2333 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2334 SILC_TASK_PRI_NORMAL);
2337 /* Sends disconnect message to remote connection and disconnects the
2340 void silc_server_disconnect_remote(SilcServer server,
2341 SilcSocketConnection sock,
2342 const char *fmt, ...)
2345 unsigned char buf[4096];
2350 memset(buf, 0, sizeof(buf));
2352 vsprintf(buf, fmt, ap);
2355 SILC_LOG_DEBUG(("Disconnecting remote host"));
2357 /* Notify remote end that the conversation is over. The notify message
2358 is tried to be sent immediately. */
2359 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2360 buf, strlen(buf), TRUE);
2361 silc_server_packet_queue_purge(server, sock);
2363 /* Mark the connection to be disconnected */
2364 SILC_SET_DISCONNECTED(sock);
2365 silc_server_close_connection(server, sock);
2370 SilcClientEntry client;
2371 } *FreeClientInternal;
2373 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2375 FreeClientInternal i = (FreeClientInternal)context;
2377 silc_idlist_del_data(i->client);
2378 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2382 /* Frees client data and notifies about client's signoff. */
2384 void silc_server_free_client_data(SilcServer server,
2385 SilcSocketConnection sock,
2386 SilcClientEntry client,
2388 const char *signoff)
2390 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2392 /* If there is pending outgoing data for the client then purge it
2393 to the network before removing the client entry. */
2394 silc_server_packet_queue_purge(server, sock);
2399 /* Send SIGNOFF notify to routers. */
2400 if (notify && !server->standalone && server->router)
2401 silc_server_send_notify_signoff(server, server->router->connection,
2402 server->server_type == SILC_SERVER ?
2403 FALSE : TRUE, client->id, signoff);
2405 /* Remove client from all channels */
2407 silc_server_remove_from_channels(server, NULL, client,
2408 TRUE, (char *)signoff, TRUE);
2410 silc_server_remove_from_channels(server, NULL, client,
2411 FALSE, NULL, FALSE);
2413 /* Update statistics */
2414 server->stat.my_clients--;
2415 server->stat.clients--;
2416 if (server->server_type == SILC_ROUTER)
2417 server->stat.cell_clients--;
2418 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
2419 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
2421 /* We will not delete the client entry right away. We will take it
2422 into history (for WHOWAS command) for 5 minutes */
2425 silc_schedule_task_add(server->schedule, 0,
2426 silc_server_free_client_data_timeout,
2428 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2429 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2430 client->router = NULL;
2431 client->connection = NULL;
2435 /* Frees user_data pointer from socket connection object. This also sends
2436 appropriate notify packets to the network to inform about leaving
2439 void silc_server_free_sock_user_data(SilcServer server,
2440 SilcSocketConnection sock,
2441 const char *signoff_message)
2443 SILC_LOG_DEBUG(("Start"));
2445 switch (sock->type) {
2446 case SILC_SOCKET_TYPE_CLIENT:
2448 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2449 silc_server_free_client_data(server, sock, user_data, TRUE,
2453 case SILC_SOCKET_TYPE_SERVER:
2454 case SILC_SOCKET_TYPE_ROUTER:
2456 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2457 SilcServerEntry backup_router = NULL;
2460 backup_router = silc_server_backup_get(server, user_data->id);
2462 /* If this was our primary router connection then we're lost to
2463 the outside world. */
2464 if (server->router == user_data) {
2465 /* Check whether we have a backup router connection */
2466 if (!backup_router || backup_router == user_data) {
2467 silc_schedule_task_add(server->schedule, 0,
2468 silc_server_connect_to_router,
2471 SILC_TASK_PRI_NORMAL);
2473 server->id_entry->router = NULL;
2474 server->router = NULL;
2475 server->standalone = TRUE;
2476 backup_router = NULL;
2478 SILC_LOG_INFO(("New primary router is backup router %s",
2479 backup_router->server_name));
2480 SILC_LOG_DEBUG(("New primary router is backup router %s",
2481 backup_router->server_name));
2482 server->id_entry->router = backup_router;
2483 server->router = backup_router;
2484 server->router_connect = time(0);
2485 server->backup_primary = TRUE;
2486 if (server->server_type == SILC_BACKUP_ROUTER) {
2487 server->server_type = SILC_ROUTER;
2489 /* We'll need to constantly try to reconnect to the primary
2490 router so that we'll see when it comes back online. */
2491 silc_server_backup_reconnect(server, sock->ip, sock->port,
2492 silc_server_backup_connected,
2496 /* Mark this connection as replaced */
2497 silc_server_backup_replaced_add(server, user_data->id,
2500 } else if (backup_router) {
2501 SILC_LOG_INFO(("Enabling the use of backup router %s",
2502 backup_router->server_name));
2503 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2504 backup_router->server_name));
2506 /* Mark this connection as replaced */
2507 silc_server_backup_replaced_add(server, user_data->id,
2511 if (!backup_router) {
2512 /* Free all client entries that this server owns as they will
2513 become invalid now as well. */
2515 silc_server_remove_clients_by_server(server, user_data, TRUE);
2516 if (server->server_type == SILC_SERVER)
2517 silc_server_remove_channels_by_server(server, user_data);
2519 /* Update the client entries of this server to the new backup
2520 router. This also removes the clients that *really* was owned
2521 by the primary router and went down with the router. */
2522 silc_server_update_clients_by_server(server, user_data, backup_router,
2524 silc_server_update_servers_by_server(server, user_data, backup_router);
2525 if (server->server_type == SILC_SERVER)
2526 silc_server_update_channels_by_server(server, user_data,
2530 /* Free the server entry */
2531 silc_server_backup_del(server, user_data);
2532 silc_server_backup_replaced_del(server, user_data);
2533 silc_idlist_del_data(user_data);
2534 if (!silc_idlist_del_server(server->local_list, user_data))
2535 silc_idlist_del_server(server->global_list, user_data);
2536 server->stat.my_servers--;
2537 server->stat.servers--;
2538 if (server->server_type == SILC_ROUTER)
2539 server->stat.cell_servers--;
2541 if (backup_router) {
2542 /* Announce all of our stuff that was created about 5 minutes ago.
2543 The backup router knows all the other stuff already. */
2544 if (server->server_type == SILC_ROUTER)
2545 silc_server_announce_servers(server, FALSE, time(0) - 300,
2546 backup_router->connection);
2548 /* Announce our clients and channels to the router */
2549 silc_server_announce_clients(server, time(0) - 300,
2550 backup_router->connection);
2551 silc_server_announce_channels(server, time(0) - 300,
2552 backup_router->connection);
2558 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2560 silc_idlist_del_data(user_data);
2561 silc_free(user_data);
2566 /* If any protocol is active cancel its execution */
2567 if (sock->protocol) {
2568 silc_protocol_cancel(sock->protocol, server->schedule);
2569 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2570 silc_protocol_execute_final(sock->protocol, server->schedule);
2571 sock->protocol = NULL;
2574 sock->user_data = NULL;
2577 /* Removes client from all channels it has joined. This is used when client
2578 connection is disconnected. If the client on a channel is last, the
2579 channel is removed as well. This sends the SIGNOFF notify types. */
2581 void silc_server_remove_from_channels(SilcServer server,
2582 SilcSocketConnection sock,
2583 SilcClientEntry client,
2585 char *signoff_message,
2588 SilcChannelEntry channel;
2589 SilcChannelClientEntry chl;
2590 SilcHashTableList htl;
2593 SILC_LOG_DEBUG(("Start"));
2595 if (!client || !client->id)
2598 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2600 /* Remove the client from all channels. The client is removed from
2601 the channels' user list. */
2602 silc_hash_table_list(client->channels, &htl);
2603 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2604 channel = chl->channel;
2606 /* Remove channel from client's channel list */
2607 silc_hash_table_del(client->channels, channel);
2609 /* Remove channel if there is no users anymore */
2610 if (server->server_type == SILC_ROUTER &&
2611 silc_hash_table_count(channel->user_list) < 2) {
2613 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2614 if (silc_idlist_del_channel(server->local_list, channel))
2615 server->stat.my_channels--;
2617 silc_idlist_del_channel(server->global_list, channel);
2621 /* Remove client from channel's client list */
2622 silc_hash_table_del(channel->user_list, chl->client);
2623 channel->user_count--;
2625 /* If there is no global users on the channel anymore mark the channel
2626 as local channel. Do not check if the removed client is local client. */
2627 if (server->server_type != SILC_ROUTER && channel->global_users &&
2628 chl->client->router && !silc_server_channel_has_global(channel))
2629 channel->global_users = FALSE;
2632 server->stat.my_chanclients--;
2634 /* If there is not at least one local user on the channel then we don't
2635 need the channel entry anymore, we can remove it safely. */
2636 if (server->server_type != SILC_ROUTER &&
2637 !silc_server_channel_has_local(channel)) {
2638 /* Notify about leaving client if this channel has global users. */
2639 if (notify && channel->global_users)
2640 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2641 SILC_NOTIFY_TYPE_SIGNOFF,
2642 signoff_message ? 2 : 1,
2643 clidp->data, clidp->len,
2644 signoff_message, signoff_message ?
2645 strlen(signoff_message) : 0);
2648 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2650 if (channel->founder_key) {
2651 /* The founder auth data exists, do not remove the channel entry */
2652 SilcChannelClientEntry chl2;
2653 SilcHashTableList htl2;
2655 channel->disabled = TRUE;
2657 silc_hash_table_list(channel->user_list, &htl2);
2658 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2659 silc_hash_table_del(chl2->client->channels, channel);
2660 silc_hash_table_del(channel->user_list, chl2->client);
2661 channel->user_count--;
2664 silc_hash_table_list_reset(&htl2);
2668 /* Remove the channel entry */
2669 if (silc_idlist_del_channel(server->local_list, channel))
2670 server->stat.my_channels--;
2672 silc_idlist_del_channel(server->global_list, channel);
2676 /* Send notify to channel about client leaving SILC and thus
2677 the entire channel. */
2679 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2680 SILC_NOTIFY_TYPE_SIGNOFF,
2681 signoff_message ? 2 : 1,
2682 clidp->data, clidp->len,
2683 signoff_message, signoff_message ?
2684 strlen(signoff_message) : 0);
2686 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2687 /* Re-generate channel key */
2688 if (!silc_server_create_channel_key(server, channel, 0))
2691 /* Send the channel key to the channel. The key of course is not sent
2692 to the client who was removed from the channel. */
2693 silc_server_send_channel_key(server, client->connection, channel,
2694 server->server_type == SILC_ROUTER ?
2695 FALSE : !server->standalone);
2700 silc_hash_table_list_reset(&htl);
2701 silc_buffer_free(clidp);
2704 /* Removes client from one channel. This is used for example when client
2705 calls LEAVE command to remove itself from the channel. Returns TRUE
2706 if channel still exists and FALSE if the channel is removed when
2707 last client leaves the channel. If `notify' is FALSE notify messages
2710 int silc_server_remove_from_one_channel(SilcServer server,
2711 SilcSocketConnection sock,
2712 SilcChannelEntry channel,
2713 SilcClientEntry client,
2716 SilcChannelClientEntry chl;
2719 SILC_LOG_DEBUG(("Start"));
2721 /* Get the entry to the channel, if this client is not on the channel
2723 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2726 /* Remove the client from the channel. The client is removed from
2727 the channel's user list. */
2729 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2731 /* Remove channel from client's channel list */
2732 silc_hash_table_del(client->channels, chl->channel);
2734 /* Remove channel if there is no users anymore */
2735 if (server->server_type == SILC_ROUTER &&
2736 silc_hash_table_count(channel->user_list) < 2) {
2738 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2739 if (silc_idlist_del_channel(server->local_list, channel))
2740 server->stat.my_channels--;
2742 silc_idlist_del_channel(server->global_list, channel);
2743 silc_buffer_free(clidp);
2747 /* Remove client from channel's client list */
2748 silc_hash_table_del(channel->user_list, chl->client);
2749 channel->user_count--;
2751 /* If there is no global users on the channel anymore mark the channel
2752 as local channel. Do not check if the client is local client. */
2753 if (server->server_type != SILC_ROUTER && channel->global_users &&
2754 chl->client->router && !silc_server_channel_has_global(channel))
2755 channel->global_users = FALSE;
2758 server->stat.my_chanclients--;
2760 /* If there is not at least one local user on the channel then we don't
2761 need the channel entry anymore, we can remove it safely. */
2762 if (server->server_type != SILC_ROUTER &&
2763 !silc_server_channel_has_local(channel)) {
2764 /* Notify about leaving client if this channel has global users. */
2765 if (notify && channel->global_users)
2766 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2767 SILC_NOTIFY_TYPE_LEAVE, 1,
2768 clidp->data, clidp->len);
2770 silc_buffer_free(clidp);
2773 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2775 if (channel->founder_key) {
2776 /* The founder auth data exists, do not remove the channel entry */
2777 SilcChannelClientEntry chl2;
2778 SilcHashTableList htl2;
2780 channel->disabled = TRUE;
2782 silc_hash_table_list(channel->user_list, &htl2);
2783 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2784 silc_hash_table_del(chl2->client->channels, channel);
2785 silc_hash_table_del(channel->user_list, chl2->client);
2786 channel->user_count--;
2789 silc_hash_table_list_reset(&htl2);
2793 /* Remove the channel entry */
2794 if (silc_idlist_del_channel(server->local_list, channel))
2795 server->stat.my_channels--;
2797 silc_idlist_del_channel(server->global_list, channel);
2801 /* Send notify to channel about client leaving the channel */
2803 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2804 SILC_NOTIFY_TYPE_LEAVE, 1,
2805 clidp->data, clidp->len);
2807 silc_buffer_free(clidp);
2811 /* Timeout callback. This is called if connection is idle or for some
2812 other reason is not responding within some period of time. This
2813 disconnects the remote end. */
2815 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2817 SilcServer server = (SilcServer)context;
2818 SilcSocketConnection sock = server->sockets[fd];
2820 SILC_LOG_DEBUG(("Start"));
2825 SILC_LOG_ERROR(("No response from %s (%s), Connection timeout",
2826 sock->hostname, sock->ip));
2828 /* If we have protocol active we must assure that we call the protocol's
2829 final callback so that all the memory is freed. */
2830 if (sock->protocol) {
2831 silc_protocol_cancel(sock->protocol, server->schedule);
2832 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2833 silc_protocol_execute_final(sock->protocol, server->schedule);
2834 sock->protocol = NULL;
2838 if (sock->user_data)
2839 silc_server_free_sock_user_data(server, sock, NULL);
2841 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2842 "Connection timeout");
2845 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2846 function may be used only by router. In real SILC network all channels
2847 are created by routers thus this function is never used by normal
2850 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2851 SilcServerID *router_id,
2857 SilcChannelID *channel_id;
2858 SilcChannelEntry entry;
2862 SILC_LOG_DEBUG(("Creating new channel"));
2865 cipher = SILC_DEFAULT_CIPHER;
2867 hmac = SILC_DEFAULT_HMAC;
2869 /* Allocate cipher */
2870 if (!silc_cipher_alloc(cipher, &key))
2874 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2875 silc_cipher_free(key);
2879 channel_name = strdup(channel_name);
2881 /* Create the channel ID */
2882 if (!silc_id_create_channel_id(server, router_id, server->rng,
2884 silc_free(channel_name);
2885 silc_cipher_free(key);
2886 silc_hmac_free(newhmac);
2890 /* Create the channel */
2891 entry = silc_idlist_add_channel(server->local_list, channel_name,
2892 SILC_CHANNEL_MODE_NONE, channel_id,
2893 NULL, key, newhmac, 0);
2895 silc_free(channel_name);
2896 silc_cipher_free(key);
2897 silc_hmac_free(newhmac);
2898 silc_free(channel_id);
2902 entry->cipher = strdup(cipher);
2903 entry->hmac_name = strdup(hmac);
2905 /* Now create the actual key material */
2906 if (!silc_server_create_channel_key(server, entry,
2907 silc_cipher_get_key_len(key) / 8)) {
2908 silc_idlist_del_channel(server->local_list, entry);
2912 /* Notify other routers about the new channel. We send the packet
2913 to our primary route. */
2914 if (broadcast && server->standalone == FALSE)
2915 silc_server_send_new_channel(server, server->router->connection, TRUE,
2916 channel_name, entry->id,
2917 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2920 server->stat.my_channels++;
2925 /* Same as above but creates the channel with Channel ID `channel_id. */
2928 silc_server_create_new_channel_with_id(SilcServer server,
2932 SilcChannelID *channel_id,
2935 SilcChannelEntry entry;
2939 SILC_LOG_DEBUG(("Creating new channel"));
2942 cipher = SILC_DEFAULT_CIPHER;
2944 hmac = SILC_DEFAULT_HMAC;
2946 /* Allocate cipher */
2947 if (!silc_cipher_alloc(cipher, &key))
2951 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2952 silc_cipher_free(key);
2956 channel_name = strdup(channel_name);
2958 /* Create the channel */
2959 entry = silc_idlist_add_channel(server->local_list, channel_name,
2960 SILC_CHANNEL_MODE_NONE, channel_id,
2961 NULL, key, newhmac, 0);
2963 silc_cipher_free(key);
2964 silc_hmac_free(newhmac);
2965 silc_free(channel_name);
2969 /* Now create the actual key material */
2970 if (!silc_server_create_channel_key(server, entry,
2971 silc_cipher_get_key_len(key) / 8)) {
2972 silc_idlist_del_channel(server->local_list, entry);
2976 /* Notify other routers about the new channel. We send the packet
2977 to our primary route. */
2978 if (broadcast && server->standalone == FALSE)
2979 silc_server_send_new_channel(server, server->router->connection, TRUE,
2980 channel_name, entry->id,
2981 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2984 server->stat.my_channels++;
2989 /* Channel's key re-key timeout callback. */
2991 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2993 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2994 SilcServer server = (SilcServer)rekey->context;
2998 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3001 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3004 /* Generates new channel key. This is used to create the initial channel key
3005 but also to re-generate new key for channel. If `key_len' is provided
3006 it is the bytes of the key length. */
3008 bool silc_server_create_channel_key(SilcServer server,
3009 SilcChannelEntry channel,
3013 unsigned char channel_key[32], hash[32];
3016 SILC_LOG_DEBUG(("Generating channel key"));
3018 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3019 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3023 if (!channel->channel_key)
3024 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
3025 channel->channel_key = NULL;
3031 else if (channel->key_len)
3032 len = channel->key_len / 8;
3034 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3036 /* Create channel key */
3037 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3040 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3042 /* Remove old key if exists */
3044 memset(channel->key, 0, channel->key_len / 8);
3045 silc_free(channel->key);
3049 channel->key_len = len * 8;
3050 channel->key = silc_memdup(channel_key, len);
3051 memset(channel_key, 0, sizeof(channel_key));
3053 /* Generate HMAC key from the channel key data and set it */
3055 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3056 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
3057 silc_hmac_set_key(channel->hmac, hash,
3058 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3059 memset(hash, 0, sizeof(hash));
3061 if (server->server_type == SILC_ROUTER) {
3062 if (!channel->rekey)
3063 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3064 channel->rekey->context = (void *)server;
3065 channel->rekey->channel = channel;
3066 channel->rekey->key_len = key_len;
3067 if (channel->rekey->task)
3068 silc_schedule_task_del(server->schedule, channel->rekey->task);
3070 channel->rekey->task =
3071 silc_schedule_task_add(server->schedule, 0,
3072 silc_server_channel_key_rekey,
3073 (void *)channel->rekey,
3074 server->config->channel_rekey_secs, 0,
3076 SILC_TASK_PRI_NORMAL);
3082 /* Saves the channel key found in the encoded `key_payload' buffer. This
3083 function is used when we receive Channel Key Payload and also when we're
3084 processing JOIN command reply. Returns entry to the channel. */
3086 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3087 SilcBuffer key_payload,
3088 SilcChannelEntry channel)
3090 SilcChannelKeyPayload payload = NULL;
3091 SilcChannelID *id = NULL;
3092 unsigned char *tmp, hash[32];
3096 SILC_LOG_DEBUG(("Start"));
3098 /* Decode channel key payload */
3099 payload = silc_channel_key_payload_parse(key_payload->data,
3102 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3107 /* Get the channel entry */
3110 /* Get channel ID */
3111 tmp = silc_channel_key_get_id(payload, &tmp_len);
3112 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3118 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3120 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3122 SILC_LOG_ERROR(("Received key for non-existent channel %s",
3123 silc_id_render(id, SILC_ID_CHANNEL)));
3129 tmp = silc_channel_key_get_key(payload, &tmp_len);
3135 cipher = silc_channel_key_get_cipher(payload, NULL);
3141 /* Remove old key if exists */
3143 memset(channel->key, 0, channel->key_len / 8);
3144 silc_free(channel->key);
3145 silc_cipher_free(channel->channel_key);
3148 /* Create new cipher */
3149 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3150 channel->channel_key = NULL;
3155 if (channel->cipher)
3156 silc_free(channel->cipher);
3157 channel->cipher = strdup(cipher);
3160 channel->key_len = tmp_len * 8;
3161 channel->key = silc_memdup(tmp, tmp_len);
3162 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3164 /* Generate HMAC key from the channel key data and set it */
3166 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3167 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3168 silc_hmac_set_key(channel->hmac, hash,
3169 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3171 memset(hash, 0, sizeof(hash));
3172 memset(tmp, 0, tmp_len);
3174 if (server->server_type == SILC_ROUTER) {
3175 if (!channel->rekey)
3176 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3177 channel->rekey->context = (void *)server;
3178 channel->rekey->channel = channel;
3179 if (channel->rekey->task)
3180 silc_schedule_task_del(server->schedule, channel->rekey->task);
3182 channel->rekey->task =
3183 silc_schedule_task_add(server->schedule, 0,
3184 silc_server_channel_key_rekey,
3185 (void *)channel->rekey,
3186 server->config->channel_rekey_secs, 0,
3188 SILC_TASK_PRI_NORMAL);
3194 silc_channel_key_payload_free(payload);
3199 /* Heartbeat callback. This function is set as argument for the
3200 silc_socket_set_heartbeat function. The library will call this function
3201 at the set time interval. */
3203 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3206 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3208 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
3210 /* Send the heartbeat */
3211 silc_server_send_heartbeat(hb->server, sock);
3214 /* Returns assembled of all servers in the given ID list. The packet's
3215 form is dictated by the New ID payload. */
3217 static void silc_server_announce_get_servers(SilcServer server,
3218 SilcServerEntry remote,
3220 SilcBuffer *servers,
3221 unsigned long creation_time)
3223 SilcIDCacheList list;
3224 SilcIDCacheEntry id_cache;
3225 SilcServerEntry entry;
3228 /* Go through all clients in the list */
3229 if (silc_idcache_get_all(id_list->servers, &list)) {
3230 if (silc_idcache_list_first(list, &id_cache)) {
3232 entry = (SilcServerEntry)id_cache->context;
3234 /* Do not announce the one we've sending our announcements and
3235 do not announce ourself. Also check the creation time if it's
3237 if ((entry == remote) || (entry == server->id_entry) ||
3238 (creation_time && entry->data.created < creation_time)) {
3239 if (!silc_idcache_list_next(list, &id_cache))
3244 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3246 *servers = silc_buffer_realloc(*servers,
3248 (*servers)->truelen + idp->len :
3250 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3251 silc_buffer_put(*servers, idp->data, idp->len);
3252 silc_buffer_pull(*servers, idp->len);
3253 silc_buffer_free(idp);
3255 if (!silc_idcache_list_next(list, &id_cache))
3260 silc_idcache_list_free(list);
3265 silc_server_announce_encode_notify(SilcNotifyType notify, SilcUInt32 argc, ...)
3271 p = silc_notify_payload_encode(notify, argc, ap);
3277 /* This function is used by router to announce existing servers to our
3278 primary router when we've connected to it. If `creation_time' is non-zero
3279 then only the servers that has been created after the `creation_time'
3280 will be announced. */
3282 void silc_server_announce_servers(SilcServer server, bool global,
3283 unsigned long creation_time,
3284 SilcSocketConnection remote)
3286 SilcBuffer servers = NULL;
3288 SILC_LOG_DEBUG(("Announcing servers"));
3290 /* Get servers in local list */
3291 silc_server_announce_get_servers(server, remote->user_data,
3292 server->local_list, &servers,
3296 /* Get servers in global list */
3297 silc_server_announce_get_servers(server, remote->user_data,
3298 server->global_list, &servers,
3302 silc_buffer_push(servers, servers->data - servers->head);
3303 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3305 /* Send the packet */
3306 silc_server_packet_send(server, remote,
3307 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3308 servers->data, servers->len, TRUE);
3310 silc_buffer_free(servers);
3314 /* Returns assembled packet of all clients in the given ID list. The
3315 packet's form is dictated by the New ID Payload. */
3317 static void silc_server_announce_get_clients(SilcServer server,
3319 SilcBuffer *clients,
3321 unsigned long creation_time)
3323 SilcIDCacheList list;
3324 SilcIDCacheEntry id_cache;
3325 SilcClientEntry client;
3328 unsigned char mode[4];
3330 /* Go through all clients in the list */
3331 if (silc_idcache_get_all(id_list->clients, &list)) {
3332 if (silc_idcache_list_first(list, &id_cache)) {
3334 client = (SilcClientEntry)id_cache->context;
3336 if (creation_time && client->data.created < creation_time) {
3337 if (!silc_idcache_list_next(list, &id_cache))
3342 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3344 *clients = silc_buffer_realloc(*clients,
3346 (*clients)->truelen + idp->len :
3348 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3349 silc_buffer_put(*clients, idp->data, idp->len);
3350 silc_buffer_pull(*clients, idp->len);
3352 SILC_PUT32_MSB(client->mode, mode);
3353 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3354 2, idp->data, idp->len,
3356 *umodes = silc_buffer_realloc(*umodes,
3358 (*umodes)->truelen + tmp->len :
3360 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3361 silc_buffer_put(*umodes, tmp->data, tmp->len);
3362 silc_buffer_pull(*umodes, tmp->len);
3363 silc_buffer_free(tmp);
3365 silc_buffer_free(idp);
3367 if (!silc_idcache_list_next(list, &id_cache))
3372 silc_idcache_list_free(list);
3376 /* This function is used to announce our existing clients to our router
3377 when we've connected to it. If `creation_time' is non-zero then only
3378 the clients that has been created after the `creation_time' will be
3381 void silc_server_announce_clients(SilcServer server,
3382 unsigned long creation_time,
3383 SilcSocketConnection remote)
3385 SilcBuffer clients = NULL;
3386 SilcBuffer umodes = NULL;
3388 SILC_LOG_DEBUG(("Announcing clients"));
3390 /* Get clients in local list */
3391 silc_server_announce_get_clients(server, server->local_list,
3392 &clients, &umodes, creation_time);
3394 /* As router we announce our global list as well */
3395 if (server->server_type == SILC_ROUTER)
3396 silc_server_announce_get_clients(server, server->global_list,
3397 &clients, &umodes, creation_time);
3400 silc_buffer_push(clients, clients->data - clients->head);
3401 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3403 /* Send the packet */
3404 silc_server_packet_send(server, remote,
3405 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3406 clients->data, clients->len, TRUE);
3408 silc_buffer_free(clients);
3412 silc_buffer_push(umodes, umodes->data - umodes->head);
3413 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3415 /* Send the packet */
3416 silc_server_packet_send(server, remote,
3417 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3418 umodes->data, umodes->len, TRUE);
3420 silc_buffer_free(umodes);
3424 /* Returns channel's topic for announcing it */
3426 void silc_server_announce_get_channel_topic(SilcServer server,
3427 SilcChannelEntry channel,
3432 if (channel->topic) {
3433 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3434 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3435 chidp->data, chidp->len,
3437 strlen(channel->topic));
3438 silc_buffer_free(chidp);
3442 /* Returns assembled packets for channel users of the `channel'. */
3444 void silc_server_announce_get_channel_users(SilcServer server,
3445 SilcChannelEntry channel,
3446 SilcBuffer *channel_users,
3447 SilcBuffer *channel_users_modes)
3449 SilcChannelClientEntry chl;
3450 SilcHashTableList htl;
3451 SilcBuffer chidp, clidp;
3454 unsigned char mode[4];
3456 SILC_LOG_DEBUG(("Start"));
3458 /* Now find all users on the channel */
3459 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3460 silc_hash_table_list(channel->user_list, &htl);
3461 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3462 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3465 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3466 clidp->data, clidp->len,
3467 chidp->data, chidp->len);
3470 silc_buffer_realloc(*channel_users,
3472 (*channel_users)->truelen + len : len));
3473 silc_buffer_pull_tail(*channel_users,
3474 ((*channel_users)->end -
3475 (*channel_users)->data));
3477 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3478 silc_buffer_pull(*channel_users, len);
3479 silc_buffer_free(tmp);
3481 /* CUMODE notify for mode change on the channel */
3482 SILC_PUT32_MSB(chl->mode, mode);
3483 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3484 3, clidp->data, clidp->len,
3486 clidp->data, clidp->len);
3488 *channel_users_modes =
3489 silc_buffer_realloc(*channel_users_modes,
3490 (*channel_users_modes ?
3491 (*channel_users_modes)->truelen + len : len));
3492 silc_buffer_pull_tail(*channel_users_modes,
3493 ((*channel_users_modes)->end -
3494 (*channel_users_modes)->data));
3496 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3497 silc_buffer_pull(*channel_users_modes, len);
3498 silc_buffer_free(tmp);
3500 silc_buffer_free(clidp);
3502 silc_hash_table_list_reset(&htl);
3503 silc_buffer_free(chidp);
3506 /* Returns assembled packets for all channels and users on those channels
3507 from the given ID List. The packets are in the form dictated by the
3508 New Channel and New Channel User payloads. */
3510 void silc_server_announce_get_channels(SilcServer server,
3512 SilcBuffer *channels,
3513 SilcBuffer *channel_users,
3514 SilcBuffer **channel_users_modes,
3515 SilcUInt32 *channel_users_modes_c,
3516 SilcBuffer **channel_topics,
3517 SilcChannelID ***channel_ids,
3518 unsigned long creation_time)
3520 SilcIDCacheList list;
3521 SilcIDCacheEntry id_cache;
3522 SilcChannelEntry channel;
3525 SilcUInt16 name_len;
3527 int i = *channel_users_modes_c;
3530 SILC_LOG_DEBUG(("Start"));
3532 /* Go through all channels in the list */
3533 if (silc_idcache_get_all(id_list->channels, &list)) {
3534 if (silc_idcache_list_first(list, &id_cache)) {
3536 channel = (SilcChannelEntry)id_cache->context;
3538 if (creation_time && channel->created < creation_time)
3543 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3544 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3545 name_len = strlen(channel->channel_name);
3548 len = 4 + name_len + id_len + 4;
3550 silc_buffer_realloc(*channels,
3551 (*channels ? (*channels)->truelen +
3553 silc_buffer_pull_tail(*channels,
3554 ((*channels)->end - (*channels)->data));
3555 silc_buffer_format(*channels,
3556 SILC_STR_UI_SHORT(name_len),
3557 SILC_STR_UI_XNSTRING(channel->channel_name,
3559 SILC_STR_UI_SHORT(id_len),
3560 SILC_STR_UI_XNSTRING(cid, id_len),
3561 SILC_STR_UI_INT(channel->mode),
3563 silc_buffer_pull(*channels, len);
3566 /* Channel user modes */
3567 *channel_users_modes = silc_realloc(*channel_users_modes,
3568 sizeof(**channel_users_modes) *
3570 (*channel_users_modes)[i] = NULL;
3571 *channel_ids = silc_realloc(*channel_ids,
3572 sizeof(**channel_ids) * (i + 1));
3573 (*channel_ids)[i] = NULL;
3574 silc_server_announce_get_channel_users(server, channel,
3576 &(*channel_users_modes)[i]);
3577 (*channel_ids)[i] = channel->id;
3579 /* Channel's topic */
3580 *channel_topics = silc_realloc(*channel_topics,
3581 sizeof(**channel_topics) * (i + 1));
3582 (*channel_topics)[i] = NULL;
3583 silc_server_announce_get_channel_topic(server, channel,
3584 &(*channel_topics)[i]);
3587 if (!silc_idcache_list_next(list, &id_cache))
3591 *channel_users_modes_c += i;
3594 silc_idcache_list_free(list);
3598 /* This function is used to announce our existing channels to our router
3599 when we've connected to it. This also announces the users on the
3600 channels to the router. If the `creation_time' is non-zero only the
3601 channels that was created after the `creation_time' are announced.
3602 Note that the channel users are still announced even if the `creation_time'
3605 void silc_server_announce_channels(SilcServer server,
3606 unsigned long creation_time,
3607 SilcSocketConnection remote)
3609 SilcBuffer channels = NULL, channel_users = NULL;
3610 SilcBuffer *channel_users_modes = NULL;
3611 SilcBuffer *channel_topics = NULL;
3612 SilcUInt32 channel_users_modes_c = 0;
3613 SilcChannelID **channel_ids = NULL;
3615 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3617 /* Get channels and channel users in local list */
3618 silc_server_announce_get_channels(server, server->local_list,
3619 &channels, &channel_users,
3620 &channel_users_modes,
3621 &channel_users_modes_c,
3623 &channel_ids, creation_time);
3625 /* Get channels and channel users in global list */
3626 if (server->server_type != SILC_SERVER)
3627 silc_server_announce_get_channels(server, server->global_list,
3628 &channels, &channel_users,
3629 &channel_users_modes,
3630 &channel_users_modes_c,
3632 &channel_ids, creation_time);
3635 silc_buffer_push(channels, channels->data - channels->head);
3636 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3638 /* Send the packet */
3639 silc_server_packet_send(server, remote,
3640 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3641 channels->data, channels->len,
3644 silc_buffer_free(channels);
3647 if (channel_users) {
3648 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3649 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3650 channel_users->len);
3652 /* Send the packet */
3653 silc_server_packet_send(server, remote,
3654 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3655 channel_users->data, channel_users->len,
3658 silc_buffer_free(channel_users);
3661 if (channel_users_modes) {
3664 for (i = 0; i < channel_users_modes_c; i++) {
3665 if (!channel_users_modes[i])
3667 silc_buffer_push(channel_users_modes[i],
3668 channel_users_modes[i]->data -
3669 channel_users_modes[i]->head);
3670 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3671 channel_users_modes[i]->len);
3672 silc_server_packet_send_dest(server, remote,
3673 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3674 channel_ids[i], SILC_ID_CHANNEL,
3675 channel_users_modes[i]->data,
3676 channel_users_modes[i]->len,
3678 silc_buffer_free(channel_users_modes[i]);
3680 silc_free(channel_users_modes);
3683 if (channel_topics) {
3686 for (i = 0; i < channel_users_modes_c; i++) {
3687 if (!channel_topics[i])
3690 silc_buffer_push(channel_topics[i],
3691 channel_topics[i]->data -
3692 channel_topics[i]->head);
3693 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3694 channel_topics[i]->len);
3695 silc_server_packet_send_dest(server, remote,
3696 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3697 channel_ids[i], SILC_ID_CHANNEL,
3698 channel_topics[i]->data,
3699 channel_topics[i]->len,
3701 silc_buffer_free(channel_topics[i]);
3703 silc_free(channel_topics);
3706 silc_free(channel_ids);
3709 /* Failure timeout callback. If this is called then we will immediately
3710 process the received failure. We always process the failure with timeout
3711 since we do not want to blindly trust to received failure packets.
3712 This won't be called (the timeout is cancelled) if the failure was
3713 bogus (it is bogus if remote does not close the connection after sending
3716 SILC_TASK_CALLBACK(silc_server_failure_callback)
3718 SilcServerFailureContext f = (SilcServerFailureContext)context;
3720 if (f->sock->protocol) {
3721 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3722 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3728 /* Assembles user list and users mode list from the `channel'. */
3730 void silc_server_get_users_on_channel(SilcServer server,
3731 SilcChannelEntry channel,
3732 SilcBuffer *user_list,
3733 SilcBuffer *mode_list,
3734 SilcUInt32 *user_count)
3736 SilcChannelClientEntry chl;
3737 SilcHashTableList htl;
3738 SilcBuffer client_id_list;
3739 SilcBuffer client_mode_list;
3741 SilcUInt32 list_count = 0, len = 0;
3743 silc_hash_table_list(channel->user_list, &htl);
3744 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3745 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3746 silc_hash_table_list_reset(&htl);
3748 client_id_list = silc_buffer_alloc(len);
3750 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3751 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3752 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3754 silc_hash_table_list(channel->user_list, &htl);
3755 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3757 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3758 silc_buffer_put(client_id_list, idp->data, idp->len);
3759 silc_buffer_pull(client_id_list, idp->len);
3760 silc_buffer_free(idp);
3762 /* Client's mode on channel */
3763 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3764 silc_buffer_pull(client_mode_list, 4);
3768 silc_hash_table_list_reset(&htl);
3769 silc_buffer_push(client_id_list,
3770 client_id_list->data - client_id_list->head);
3771 silc_buffer_push(client_mode_list,
3772 client_mode_list->data - client_mode_list->head);
3774 *user_list = client_id_list;
3775 *mode_list = client_mode_list;
3776 *user_count = list_count;
3779 /* Saves users and their modes to the `channel'. */
3781 void silc_server_save_users_on_channel(SilcServer server,
3782 SilcSocketConnection sock,
3783 SilcChannelEntry channel,
3784 SilcClientID *noadd,
3785 SilcBuffer user_list,
3786 SilcBuffer mode_list,
3787 SilcUInt32 user_count)
3792 SilcClientID *client_id;
3793 SilcClientEntry client;
3794 SilcIDCacheEntry cache;
3797 SILC_LOG_DEBUG(("Start"));
3799 for (i = 0; i < user_count; i++) {
3801 SILC_GET16_MSB(idp_len, user_list->data + 2);
3803 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3804 silc_buffer_pull(user_list, idp_len);
3809 SILC_GET32_MSB(mode, mode_list->data);
3810 silc_buffer_pull(mode_list, 4);
3812 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3813 silc_free(client_id);
3819 /* Check if we have this client cached already. */
3820 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3821 server->server_type, &cache);
3823 client = silc_idlist_find_client_by_id(server->global_list,
3824 client_id, server->server_type,
3829 /* If router did not find such Client ID in its lists then this must
3830 be bogus client or some router in the net is buggy. */
3831 if (server->server_type == SILC_ROUTER) {
3832 silc_free(client_id);
3836 /* We don't have that client anywhere, add it. The client is added
3837 to global list since server didn't have it in the lists so it must be
3839 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3840 silc_id_dup(client_id, SILC_ID_CLIENT),
3841 sock->user_data, NULL, 0);
3843 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3844 silc_free(client_id);
3848 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3850 /* Found, if it is from global list we'll assure that we won't
3851 expire it now that the entry is on channel. */
3856 silc_free(client_id);
3858 if (!silc_server_client_on_channel(client, channel)) {
3859 /* Client was not on the channel, add it. */
3860 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3861 chl->client = client;
3863 chl->channel = channel;
3864 silc_hash_table_add(channel->user_list, chl->client, chl);
3865 silc_hash_table_add(client->channels, chl->channel, chl);
3866 channel->user_count++;
3871 /* Lookups route to the client indicated by the `id_data'. The connection
3872 object and internal data object is returned. Returns NULL if route
3873 could not be found to the client. If the `client_id' is specified then
3874 it is used and the `id_data' is ignored. */
3876 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3877 unsigned char *id_data,
3879 SilcClientID *client_id,
3880 SilcIDListData *idata)
3883 SilcClientEntry client;
3885 SILC_LOG_DEBUG(("Start"));
3887 /* Decode destination Client ID */
3889 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3891 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3895 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3898 /* If the destination belongs to our server we don't have to route
3899 the packet anywhere but to send it to the local destination. */
3900 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3904 /* If we are router and the client has router then the client is in
3905 our cell but not directly connected to us. */
3906 if (server->server_type == SILC_ROUTER && client->router) {
3907 /* We are of course in this case the client's router thus the route
3908 to the client is the server who owns the client. So, we will send
3909 the packet to that server. */
3911 *idata = (SilcIDListData)client->router;
3912 return client->router->connection;
3915 /* Seems that client really is directly connected to us */
3917 *idata = (SilcIDListData)client;
3918 return client->connection;
3921 /* Destination belongs to someone not in this server. If we are normal
3922 server our action is to send the packet to our router. */
3923 if (server->server_type != SILC_ROUTER && !server->standalone) {
3926 *idata = (SilcIDListData)server->router;
3927 return server->router->connection;
3930 /* We are router and we will perform route lookup for the destination
3931 and send the packet to fastest route. */
3932 if (server->server_type == SILC_ROUTER && !server->standalone) {
3933 /* Check first that the ID is valid */
3934 client = silc_idlist_find_client_by_id(server->global_list, id,
3937 SilcSocketConnection dst_sock;
3939 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3943 *idata = (SilcIDListData)dst_sock->user_data;
3952 /* Encodes and returns channel list of channels the `client' has joined.
3953 Secret channels are not put to the list. */
3955 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3956 SilcClientEntry client)
3958 SilcBuffer buffer = NULL;
3959 SilcChannelEntry channel;
3960 SilcChannelClientEntry chl;
3961 SilcHashTableList htl;
3964 SilcUInt16 name_len;
3967 silc_hash_table_list(client->channels, &htl);
3968 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3969 channel = chl->channel;
3971 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3972 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3975 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3976 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3977 name_len = strlen(channel->channel_name);
3979 len = 4 + name_len + id_len + 4;
3980 buffer = silc_buffer_realloc(buffer,
3981 (buffer ? (buffer)->truelen + len : len));
3982 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3983 silc_buffer_format(buffer,
3984 SILC_STR_UI_SHORT(name_len),
3985 SILC_STR_UI_XNSTRING(channel->channel_name,
3987 SILC_STR_UI_SHORT(id_len),
3988 SILC_STR_UI_XNSTRING(cid, id_len),
3989 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3991 silc_buffer_pull(buffer, len);
3994 silc_hash_table_list_reset(&htl);
3997 silc_buffer_push(buffer, buffer->data - buffer->head);
4002 /* Finds client entry by Client ID and if it is not found then resolves
4003 it using WHOIS command. */
4005 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
4006 SilcClientID *client_id,
4009 SilcClientEntry client;
4014 client = silc_idlist_find_client_by_id(server->local_list, client_id,
4017 client = silc_idlist_find_client_by_id(server->global_list,
4018 client_id, TRUE, NULL);
4019 if (!client && server->server_type == SILC_ROUTER)
4023 if (!client && server->standalone)
4026 if (!client || !client->nickname || !client->username) {
4027 SilcBuffer buffer, idp;
4029 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
4030 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
4031 client->resolve_cmd_ident = ++server->cmd_ident;
4033 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
4034 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
4035 server->cmd_ident, 1,
4036 3, idp->data, idp->len);
4037 silc_server_packet_send(server, client ? client->router->connection :
4038 server->router->connection,
4039 SILC_PACKET_COMMAND, 0,
4040 buffer->data, buffer->len, FALSE);
4041 silc_buffer_free(idp);
4042 silc_buffer_free(buffer);
4053 /* A timeout callback for the re-key. We will be the initiator of the
4056 SILC_TASK_CALLBACK(silc_server_rekey_callback)
4058 SilcSocketConnection sock = (SilcSocketConnection)context;
4059 SilcIDListData idata = (SilcIDListData)sock->user_data;
4060 SilcServer server = (SilcServer)idata->rekey->context;
4061 SilcProtocol protocol;
4062 SilcServerRekeyInternalContext *proto_ctx;
4064 SILC_LOG_DEBUG(("Start"));
4066 /* Allocate internal protocol context. This is sent as context
4068 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
4069 proto_ctx->server = (void *)server;
4070 proto_ctx->sock = sock;
4071 proto_ctx->responder = FALSE;
4072 proto_ctx->pfs = idata->rekey->pfs;
4074 /* Perform rekey protocol. Will call the final callback after the
4075 protocol is over. */
4076 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4077 &protocol, proto_ctx, silc_server_rekey_final);
4078 sock->protocol = protocol;
4080 /* Run the protocol */
4081 silc_protocol_execute(protocol, server->schedule, 0, 0);
4083 /* Re-register re-key timeout */
4084 silc_schedule_task_add(server->schedule, sock->sock,
4085 silc_server_rekey_callback,
4086 context, idata->rekey->timeout, 0,
4087 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4090 /* The final callback for the REKEY protocol. This will actually take the
4091 new key material into use. */
4093 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4095 SilcProtocol protocol = (SilcProtocol)context;
4096 SilcServerRekeyInternalContext *ctx =
4097 (SilcServerRekeyInternalContext *)protocol->context;
4098 SilcServer server = (SilcServer)ctx->server;
4099 SilcSocketConnection sock = ctx->sock;
4101 SILC_LOG_DEBUG(("Start"));
4103 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4104 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4105 /* Error occured during protocol */
4106 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4107 silc_protocol_cancel(protocol, server->schedule);
4108 silc_protocol_free(protocol);
4109 sock->protocol = NULL;
4111 silc_packet_context_free(ctx->packet);
4113 silc_ske_free(ctx->ske);
4118 /* Purge the outgoing data queue to assure that all rekey packets really
4119 go to the network before we quit the protocol. */
4120 silc_server_packet_queue_purge(server, sock);
4123 silc_protocol_free(protocol);
4124 sock->protocol = NULL;
4126 silc_packet_context_free(ctx->packet);
4128 silc_ske_free(ctx->ske);