5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 silc_free(server->local_list);
81 silc_free(server->global_list);
83 silc_rng_free(server->rng);
86 silc_pkcs_free(server->pkcs);
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
93 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
118 SilcServerConfigSectionListenPort *listen;
120 SILC_LOG_DEBUG(("Initializing server"));
122 assert(server->config);
124 /* Set public and private keys */
125 if (!server->config->server_keys ||
126 !server->config->server_keys->public_key ||
127 !server->config->server_keys->private_key) {
128 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
131 server->public_key = server->config->server_keys->public_key;
132 server->private_key = server->config->server_keys->private_key;
134 /* XXX After server is made as Silc Server Library this can be given
135 as argument, for now this is hard coded */
136 server->params = silc_calloc(1, sizeof(*server->params));
137 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
138 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
139 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
140 server->params->retry_keep_trying = FALSE;
141 server->params->protocol_timeout = 60;
142 server->params->require_reverse_mapping = FALSE;
144 /* Set log files where log message should be saved. */
145 server->config->server = server;
146 silc_server_config_setlogfiles(server->config);
148 /* Register all configured ciphers, PKCS and hash functions. */
149 if (!silc_server_config_register_ciphers(server->config))
150 silc_cipher_register_default();
151 if (!silc_server_config_register_pkcs(server->config))
152 silc_pkcs_register_default();
153 if (!silc_server_config_register_hashfuncs(server->config))
154 silc_hash_register_default();
155 if (!silc_server_config_register_hmacs(server->config))
156 silc_hmac_register_default();
158 /* Initialize random number generator for the server. */
159 server->rng = silc_rng_alloc();
160 silc_rng_init(server->rng);
161 silc_rng_global_init(server->rng);
163 /* Initialize hash functions for server to use */
164 silc_hash_alloc("md5", &server->md5hash);
165 silc_hash_alloc("sha1", &server->sha1hash);
167 /* Initialize none cipher */
168 silc_cipher_alloc("none", &server->none_cipher);
170 /* Allocate PKCS context for local public and private keys */
171 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
172 silc_pkcs_public_key_set(server->pkcs, server->public_key);
173 silc_pkcs_private_key_set(server->pkcs, server->private_key);
175 /* Create a listening server. Note that our server can listen on multiple
176 ports. All listeners are created here and now. */
178 listen = server->config->listen_port;
182 tmp = silc_net_create_server(server->config->listen_port->port,
183 server->config->listen_port->listener_ip);
185 SILC_LOG_ERROR(("Could not create server listener: %s on %d",
186 server->config->listen_port->listener_ip,
187 server->config->listen_port->port));
191 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
192 sock[sock_count] = tmp;
194 listen = listen->next;
197 /* Initialize ID caches */
198 server->local_list->clients =
199 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
200 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
201 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
203 /* These are allocated for normal server as well as these hold some
204 global information that the server has fetched from its router. For
205 router these are used as they are supposed to be used on router. */
206 server->global_list->clients =
207 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
208 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
209 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
211 /* Allocate the entire socket list that is used in server. Eventually
212 all connections will have entry in this table (it is a table of
213 pointers to the actual object that is allocated individually
215 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
216 sizeof(*server->sockets));
218 for (i = 0; i < sock_count; i++) {
219 SilcSocketConnection newsocket = NULL;
221 /* Set socket to non-blocking mode */
222 silc_net_set_socket_nonblock(sock[i]);
223 server->sock = sock[i];
225 /* Create a Server ID for the server. */
226 silc_id_create_server_id(sock[i], server->rng, &id);
232 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
233 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
234 server->id_type = SILC_ID_SERVER;
235 server->server_name = server->config->server_info->server_name;
237 /* Add ourselves to the server list. We don't have a router yet
238 beacuse we haven't established a route yet. It will be done later.
239 For now, NULL is sent as router. This allocates new entry to
242 silc_idlist_add_server(server->local_list,
243 server->config->server_info->server_name,
244 server->server_type, server->id, NULL, NULL);
246 SILC_LOG_ERROR(("Could not add ourselves to cache"));
249 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
251 /* Add ourselves also to the socket table. The entry allocated above
252 is sent as argument for fast referencing in the future. */
253 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
256 server->sockets[sock[i]] = newsocket;
258 /* Perform name and address lookups to resolve the listenning address
260 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
262 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
264 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
265 newsocket->hostname ? newsocket->hostname :
266 newsocket->ip ? newsocket->ip : ""));
267 server->stat.conn_failures++;
270 if (!newsocket->hostname)
271 newsocket->hostname = strdup(newsocket->ip);
273 newsocket->port = silc_net_get_local_port(sock[i]);
275 /* Put the allocated socket pointer also to the entry allocated above
276 for fast back-referencing to the socket list. */
277 id_entry->connection = (void *)server->sockets[sock[i]];
278 server->id_entry = id_entry;
281 /* Register protocols */
282 silc_server_protocols_register();
284 /* Initialize the scheduler. */
285 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
286 if (!server->schedule)
289 /* Add the first task to the scheduler. This is task that is executed by
290 timeout. It expires as soon as the caller calls silc_server_run. This
291 task performs authentication protocol and key exchange with our
293 silc_schedule_task_add(server->schedule, sock[0],
294 silc_server_connect_to_router,
295 (void *)server, 0, 1,
297 SILC_TASK_PRI_NORMAL);
299 /* Add listener task to the scheduler. This task receives new connections
300 to the server. This task remains on the queue until the end of the
302 silc_schedule_task_add(server->schedule, sock[0],
303 silc_server_accept_new_connection,
304 (void *)server, 0, 0,
306 SILC_TASK_PRI_NORMAL);
307 server->listenning = TRUE;
309 /* If server connections has been configured then we must be router as
310 normal server cannot have server connections, only router connections. */
311 if (server->config->servers) {
312 SilcServerConfigSectionServerConnection *ptr = server->config->servers;
314 server->server_type = SILC_ROUTER;
316 if (ptr->backup_router) {
317 server->server_type = SILC_BACKUP_ROUTER;
318 server->backup_router = TRUE;
319 server->id_entry->server_type = SILC_BACKUP_ROUTER;
326 /* Register the ID Cache purge task. This periodically purges the ID cache
327 and removes the expired cache entries. */
329 /* Clients local list */
330 purge = silc_calloc(1, sizeof(*purge));
331 purge->cache = server->local_list->clients;
332 purge->schedule = server->schedule;
333 silc_schedule_task_add(purge->schedule, 0,
335 (void *)purge, 600, 0,
336 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
338 /* Clients global list */
339 purge = silc_calloc(1, sizeof(*purge));
340 purge->cache = server->global_list->clients;
341 purge->schedule = server->schedule;
342 silc_schedule_task_add(purge->schedule, 0,
344 (void *)purge, 300, 0,
345 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
347 SILC_LOG_DEBUG(("Server initialized"));
349 /* We are done here, return succesfully */
353 for (i = 0; i < sock_count; i++)
354 silc_net_close_server(sock[i]);
359 /* Fork server to background and set gid+uid to non-root.
360 Silcd will not run as root, so trying to set either user or group to
361 root will cause silcd to exit. */
363 void silc_server_daemonise(SilcServer server)
365 /* Are we executing silcd as root or a regular user? */
372 if (!server->config->identity || !server->config->identity->user ||
373 !server->config->identity->group) {
374 fprintf(stderr, "Error:"
375 "\tSILC server must not be run as root. For the security of your\n"
376 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
377 "\tuser account. Modify the [Identity] configuration section to run\n"
378 "\tthe server as non-root user.\n");
382 /* Get the values given for user and group in configuration file */
383 user=server->config->identity->user;
384 group=server->config->identity->group;
386 /* Check whether the user/group information is text */
387 if (atoi(user)!=0 || atoi(group)!=0) {
388 SILC_LOG_DEBUG(("Invalid user and/or group information"));
389 SILC_LOG_DEBUG(("User and/or group given as number"));
390 fprintf(stderr, "Invalid user and/or group information\n");
391 fprintf(stderr, "Please assign them as names, not numbers\n");
395 /* Catch the nasty incident of string "0" returning 0 from atoi */
396 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
397 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
398 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
406 fprintf(stderr, "No such user %s found\n", user);
411 fprintf(stderr, "No such group %s found\n", group);
415 /* Check whether user and/or group is set to root. If yes, exit
416 immediately. Otherwise, setgid and setuid server to user.group */
417 if (gr->gr_gid==0 || pw->pw_uid==0) {
418 fprintf(stderr, "Error:"
419 "\tSILC server must not be run as root. For the security of your\n"
420 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
421 "\tuser account. Modify the [Identity] configuration section to run\n"
422 "\tthe server as non-root user.\n");
425 /* Fork server to background, making it a daemon */
427 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
428 SILC_LOG_DEBUG(("Forking SILC server to background"));
433 SILC_LOG_DEBUG(("Changing to group %s", group));
434 if(setgid(gr->gr_gid)==0) {
435 SILC_LOG_DEBUG(("Setgid to %s", group));
437 SILC_LOG_DEBUG(("Setgid to %s failed", group));
438 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
442 SILC_LOG_DEBUG(("Changing to user nobody"));
443 if(setuid(pw->pw_uid)==0) {
444 SILC_LOG_DEBUG(("Setuid to %s", user));
446 SILC_LOG_DEBUG(("Setuid to %s failed", user));
447 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
453 /* Fork server to background, making it a daemon */
455 SILC_LOG_DEBUG(("Server started as user"));
456 SILC_LOG_DEBUG(("Forking SILC server to background"));
463 /* The heart of the server. This runs the scheduler thus runs the server.
464 When this returns the server has been stopped and the program will
467 void silc_server_run(SilcServer server)
469 SILC_LOG_DEBUG(("Running server"));
471 SILC_LOG_INFO(("SILC Server started"));
473 /* Start the scheduler, the heart of the SILC server. When this returns
474 the program will be terminated. */
475 silc_schedule(server->schedule);
478 /* Stops the SILC server. This function is used to shutdown the server.
479 This is usually called after the scheduler has returned. After stopping
480 the server one should call silc_server_free. */
482 void silc_server_stop(SilcServer server)
484 SILC_LOG_DEBUG(("Stopping server"));
486 silc_schedule_stop(server->schedule);
487 silc_schedule_uninit(server->schedule);
489 silc_server_protocols_unregister();
491 SILC_LOG_DEBUG(("Server stopped"));
494 /* Function that is called when the network connection to a router has
495 been established. This will continue with the key exchange protocol
496 with the remote router. */
498 void silc_server_start_key_exchange(SilcServer server,
499 SilcServerConnection sconn,
502 SilcSocketConnection newsocket;
503 SilcProtocol protocol;
504 SilcServerKEInternalContext *proto_ctx;
507 /* Set socket options */
508 silc_net_set_socket_nonblock(sock);
509 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
511 /* Create socket connection for the connection. Even though we
512 know that we are connecting to a router we will mark the socket
513 to be unknown connection until we have executed authentication
515 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
516 server->sockets[sock] = newsocket;
517 newsocket->hostname = strdup(sconn->remote_host);
518 newsocket->ip = strdup(sconn->remote_host);
519 newsocket->port = sconn->remote_port;
520 sconn->sock = newsocket;
522 /* Allocate internal protocol context. This is sent as context
524 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
525 proto_ctx->server = (void *)server;
526 proto_ctx->context = (void *)sconn;
527 proto_ctx->sock = newsocket;
528 proto_ctx->rng = server->rng;
529 proto_ctx->responder = FALSE;
531 /* Perform key exchange protocol. silc_server_connect_to_router_second
532 will be called after the protocol is finished. */
533 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
534 &protocol, proto_ctx,
535 silc_server_connect_to_router_second);
536 newsocket->protocol = protocol;
538 /* Register a timeout task that will be executed if the protocol
539 is not executed within set limit. */
540 proto_ctx->timeout_task =
541 silc_schedule_task_add(server->schedule, sock,
542 silc_server_timeout_remote,
543 server, server->params->protocol_timeout,
544 server->params->protocol_timeout_usec,
548 /* Register the connection for network input and output. This sets
549 that scheduler will listen for incoming packets for this connection
550 and sets that outgoing packets may be sent to this connection as
551 well. However, this doesn't set the scheduler for outgoing traffic,
552 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
553 later when outgoing data is available. */
554 context = (void *)server;
555 SILC_REGISTER_CONNECTION_FOR_IO(sock);
557 /* Run the protocol */
558 silc_protocol_execute(protocol, server->schedule, 0, 0);
561 /* Timeout callback that will be called to retry connecting to remote
562 router. This is used by both normal and router server. This will wait
563 before retrying the connecting. The timeout is generated by exponential
564 backoff algorithm. */
566 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
568 SilcServerConnection sconn = (SilcServerConnection)context;
569 SilcServer server = sconn->server;
571 SILC_LOG_INFO(("Retrying connecting to a router"));
573 /* Calculate next timeout */
574 if (sconn->retry_count >= 1) {
575 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
576 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
577 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
579 sconn->retry_timeout = server->params->retry_interval_min;
581 sconn->retry_count++;
582 sconn->retry_timeout = sconn->retry_timeout +
583 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
585 /* If we've reached max retry count, give up. */
586 if (sconn->retry_count > server->params->retry_count &&
587 server->params->retry_keep_trying == FALSE) {
588 SILC_LOG_ERROR(("Could not connect to router, giving up"));
592 /* Wait one before retrying */
593 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
594 context, sconn->retry_timeout,
595 server->params->retry_interval_min_usec,
596 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
599 /* Generic routine to use connect to a router. */
601 SILC_TASK_CALLBACK(silc_server_connect_router)
603 SilcServerConnection sconn = (SilcServerConnection)context;
604 SilcServer server = sconn->server;
607 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
608 (sconn->backup ? "backup router" : "router"),
609 sconn->remote_host, sconn->remote_port));
611 server->router_connect = time(0);
613 /* Connect to remote host */
614 sock = silc_net_create_connection(server->config->listen_port->local_ip,
618 SILC_LOG_ERROR(("Could not connect to router"));
619 silc_schedule_task_add(server->schedule, fd,
620 silc_server_connect_to_router_retry,
621 context, 0, 1, SILC_TASK_TIMEOUT,
622 SILC_TASK_PRI_NORMAL);
626 /* Continue with key exchange protocol */
627 silc_server_start_key_exchange(server, sconn, sock);
630 /* This function connects to our primary router or if we are a router this
631 establishes all our primary routes. This is called at the start of the
632 server to do authentication and key exchange with our router - called
635 SILC_TASK_CALLBACK(silc_server_connect_to_router)
637 SilcServer server = (SilcServer)context;
638 SilcServerConnection sconn;
639 SilcServerConfigSectionServerConnection *ptr;
641 SILC_LOG_DEBUG(("Connecting to router(s)"));
643 if (server->server_type == SILC_SERVER) {
644 SILC_LOG_DEBUG(("We are normal server"));
645 } else if (server->server_type == SILC_ROUTER) {
646 SILC_LOG_DEBUG(("We are router"));
648 SILC_LOG_DEBUG(("We are backup router/normal server"));
651 /* Create the connections to all our routes */
652 ptr = server->config->routers;
655 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
656 ptr->backup_router ? "Backup router" : "Router",
657 ptr->initiator ? "Initiator" : "Responder",
658 ptr->host, ptr->port));
660 if (ptr->initiator) {
661 /* Allocate connection object for hold connection specific stuff. */
662 sconn = silc_calloc(1, sizeof(*sconn));
663 sconn->server = server;
664 sconn->remote_host = strdup(ptr->host);
665 sconn->remote_port = ptr->port;
666 sconn->backup = ptr->backup_router;
668 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
669 sconn->backup_replace_port = ptr->backup_replace_port;
672 silc_schedule_task_add(server->schedule, fd,
673 silc_server_connect_router,
674 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
675 SILC_TASK_PRI_NORMAL);
684 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
686 /* There wasn't a configured router, we will continue but we don't
687 have a connection to outside world. We will be standalone server. */
688 server->standalone = TRUE;
691 /* Second part of connecting to router(s). Key exchange protocol has been
692 executed and now we will execute authentication protocol. */
694 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
696 SilcProtocol protocol = (SilcProtocol)context;
697 SilcServerKEInternalContext *ctx =
698 (SilcServerKEInternalContext *)protocol->context;
699 SilcServer server = (SilcServer)ctx->server;
700 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
701 SilcSocketConnection sock = ctx->sock;
702 SilcServerConnAuthInternalContext *proto_ctx;
703 SilcServerConfigSectionServerConnection *conn = NULL;
705 SILC_LOG_DEBUG(("Start"));
707 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
708 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
709 /* Error occured during protocol */
710 silc_protocol_free(protocol);
711 sock->protocol = NULL;
712 silc_ske_free_key_material(ctx->keymat);
714 silc_packet_context_free(ctx->packet);
716 silc_ske_free(ctx->ske);
717 silc_free(ctx->dest_id);
719 silc_schedule_task_del_by_callback(server->schedule,
720 silc_server_failure_callback);
721 silc_server_disconnect_remote(server, sock, "Server closed connection: "
722 "Key exchange failed");
726 /* We now have the key material as the result of the key exchange
727 protocol. Take the key material into use. Free the raw key material
728 as soon as we've set them into use. */
729 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
730 ctx->sock, ctx->keymat,
731 ctx->ske->prop->cipher,
732 ctx->ske->prop->pkcs,
733 ctx->ske->prop->hash,
734 ctx->ske->prop->hmac,
735 ctx->ske->prop->group,
737 silc_protocol_free(protocol);
738 sock->protocol = NULL;
739 silc_ske_free_key_material(ctx->keymat);
741 silc_packet_context_free(ctx->packet);
743 silc_ske_free(ctx->ske);
744 silc_free(ctx->dest_id);
746 silc_schedule_task_del_by_callback(server->schedule,
747 silc_server_failure_callback);
748 silc_server_disconnect_remote(server, sock, "Server closed connection: "
749 "Key exchange failed");
752 silc_ske_free_key_material(ctx->keymat);
754 /* Allocate internal context for the authentication protocol. This
755 is sent as context for the protocol. */
756 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
757 proto_ctx->server = (void *)server;
758 proto_ctx->context = (void *)sconn;
759 proto_ctx->sock = sock;
760 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
761 proto_ctx->dest_id_type = ctx->dest_id_type;
762 proto_ctx->dest_id = ctx->dest_id;
764 /* Resolve the authentication method used in this connection. Check if
765 we find a match from user configured connections */
766 conn = silc_server_config_find_router_conn(server->config,
770 /* Match found. Use the configured authentication method */
771 proto_ctx->auth_meth = conn->auth_meth;
772 if (conn->auth_data) {
773 proto_ctx->auth_data = strdup(conn->auth_data);
774 proto_ctx->auth_data_len = strlen(conn->auth_data);
777 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
778 sock->hostname, sock->ip, sock->port));
779 silc_protocol_free(protocol);
780 sock->protocol = NULL;
782 silc_packet_context_free(ctx->packet);
784 silc_ske_free(ctx->ske);
785 silc_free(ctx->dest_id);
787 silc_schedule_task_del_by_callback(server->schedule,
788 silc_server_failure_callback);
789 silc_server_disconnect_remote(server, sock, "Server closed connection: "
790 "Key exchange failed");
794 /* Free old protocol as it is finished now */
795 silc_protocol_free(protocol);
797 silc_packet_context_free(ctx->packet);
799 sock->protocol = NULL;
801 /* Allocate the authentication protocol. This is allocated here
802 but we won't start it yet. We will be receiving party of this
803 protocol thus we will wait that connecting party will make
805 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
806 &sock->protocol, proto_ctx,
807 silc_server_connect_to_router_final);
809 /* Register timeout task. If the protocol is not executed inside
810 this timelimit the connection will be terminated. Currently
811 this is 15 seconds and is hard coded limit (XXX). */
812 proto_ctx->timeout_task =
813 silc_schedule_task_add(server->schedule, sock->sock,
814 silc_server_timeout_remote,
815 (void *)server, 15, 0,
819 /* Run the protocol */
820 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
823 /* Finalizes the connection to router. Registers a server task to the
824 queue so that we can accept new connections. */
826 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
828 SilcProtocol protocol = (SilcProtocol)context;
829 SilcServerConnAuthInternalContext *ctx =
830 (SilcServerConnAuthInternalContext *)protocol->context;
831 SilcServer server = (SilcServer)ctx->server;
832 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
833 SilcSocketConnection sock = ctx->sock;
834 SilcServerEntry id_entry;
836 SilcServerHBContext hb_context;
837 unsigned char *id_string;
839 SilcIDListData idata;
841 SILC_LOG_DEBUG(("Start"));
843 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
844 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
845 /* Error occured during protocol */
846 silc_free(ctx->dest_id);
847 silc_server_disconnect_remote(server, sock, "Server closed connection: "
848 "Authentication failed");
852 /* Add a task to the queue. This task receives new connections to the
853 server. This task remains on the queue until the end of the program. */
854 if (!server->listenning && !sconn->backup) {
855 silc_schedule_task_add(server->schedule, server->sock,
856 silc_server_accept_new_connection,
857 (void *)server, 0, 0,
859 SILC_TASK_PRI_NORMAL);
860 server->listenning = TRUE;
863 /* Send NEW_SERVER packet to the router. We will become registered
864 to the SILC network after sending this packet. */
865 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
866 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
867 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
868 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
869 silc_buffer_format(packet,
870 SILC_STR_UI_SHORT(id_len),
871 SILC_STR_UI_XNSTRING(id_string, id_len),
872 SILC_STR_UI_SHORT(strlen(server->server_name)),
873 SILC_STR_UI_XNSTRING(server->server_name,
874 strlen(server->server_name)),
877 /* Send the packet */
878 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
879 packet->data, packet->len, TRUE);
880 silc_buffer_free(packet);
881 silc_free(id_string);
883 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
885 /* Check that we do not have this ID already */
886 id_entry = silc_idlist_find_server_by_id(server->local_list,
887 ctx->dest_id, TRUE, NULL);
889 silc_idcache_del_by_context(server->local_list->servers, id_entry);
891 id_entry = silc_idlist_find_server_by_id(server->global_list,
892 ctx->dest_id, TRUE, NULL);
894 silc_idcache_del_by_context(server->global_list->servers, id_entry);
897 SILC_LOG_DEBUG(("New server id(%s)",
898 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
900 /* Add the connected router to global server list */
901 id_entry = silc_idlist_add_server(server->global_list,
902 strdup(sock->hostname),
903 SILC_ROUTER, ctx->dest_id, NULL, sock);
905 silc_free(ctx->dest_id);
906 silc_server_disconnect_remote(server, sock, "Server closed connection: "
907 "Authentication failed");
911 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
912 silc_free(sock->user_data);
913 sock->user_data = (void *)id_entry;
914 sock->type = SILC_SOCKET_TYPE_ROUTER;
915 idata = (SilcIDListData)sock->user_data;
916 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
918 /* Perform keepalive. The `hb_context' will be freed automatically
919 when finally calling the silc_socket_free function. XXX hardcoded
921 hb_context = silc_calloc(1, sizeof(*hb_context));
922 hb_context->server = server;
923 silc_socket_set_heartbeat(sock, 600, hb_context,
924 silc_server_perform_heartbeat,
927 /* Register re-key timeout */
928 idata->rekey->timeout = 3600; /* XXX hardcoded */
929 idata->rekey->context = (void *)server;
930 silc_schedule_task_add(server->schedule, sock->sock,
931 silc_server_rekey_callback,
932 (void *)sock, idata->rekey->timeout, 0,
933 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
935 if (!sconn->backup) {
936 /* Mark this router our primary router if we're still standalone */
937 if (server->standalone) {
938 server->id_entry->router = id_entry;
939 server->router = id_entry;
940 server->standalone = FALSE;
942 /* If we are router then announce our possible servers. */
943 if (server->server_type == SILC_ROUTER)
944 silc_server_announce_servers(server, FALSE, 0,
945 server->router->connection);
947 /* Announce our clients and channels to the router */
948 silc_server_announce_clients(server, 0, server->router->connection);
949 silc_server_announce_channels(server, 0, server->router->connection);
952 /* Add this server to be our backup router */
953 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
954 sconn->backup_replace_port, FALSE);
957 sock->protocol = NULL;
959 /* Call the completion callback to indicate that we've connected to
962 (*sconn->callback)(server, id_entry, sconn->callback_context);
965 /* Free the temporary connection data context */
967 silc_free(sconn->remote_host);
968 silc_free(sconn->backup_replace_ip);
972 /* Free the protocol object */
973 if (sock->protocol == protocol)
974 sock->protocol = NULL;
975 silc_protocol_free(protocol);
977 silc_packet_context_free(ctx->packet);
979 silc_ske_free(ctx->ske);
983 /* Host lookup callbcak that is called after the incoming connection's
984 IP and FQDN lookup is performed. This will actually check the acceptance
985 of the incoming connection and will register the key exchange protocol
986 for this connection. */
989 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
992 SilcServer server = (SilcServer)context;
993 SilcServerKEInternalContext *proto_ctx;
994 void *cconfig, *sconfig, *rconfig;
995 SilcServerConfigSectionDenyConnection *deny;
998 SILC_LOG_DEBUG(("Start"));
1000 /* Check whether we could resolve both IP and FQDN. */
1001 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1002 server->params->require_reverse_mapping)) {
1003 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1004 sock->hostname ? sock->hostname :
1005 sock->ip ? sock->ip : ""));
1006 server->stat.conn_failures++;
1007 silc_server_disconnect_remote(server, sock,
1008 "Server closed connection: Unknown host");
1012 /* Register the connection for network input and output. This sets
1013 that scheduler will listen for incoming packets for this connection
1014 and sets that outgoing packets may be sent to this connection as well.
1015 However, this doesn't set the scheduler for outgoing traffic, it
1016 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1017 later when outgoing data is available. */
1018 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1020 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
1023 port = server->sockets[server->sock]->port; /* Listenning port */
1025 /* Check whether this connection is denied to connect to us. */
1026 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1028 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1031 /* The connection is denied */
1032 SILC_LOG_INFO(("Connection %s (%s) is denied",
1033 sock->hostname, sock->ip));
1034 silc_server_disconnect_remote(server, sock, deny->comment ?
1036 "Server closed connection: "
1037 "Connection refused");
1038 server->stat.conn_failures++;
1042 /* Check whether we have configred this sort of connection at all. We
1043 have to check all configurations since we don't know what type of
1044 connection this is. */
1045 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1047 cconfig = silc_server_config_find_client_conn(server->config,
1050 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1053 sconfig = silc_server_config_find_server_conn(server->config,
1056 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1058 rconfig = silc_server_config_find_router_conn(server->config,
1061 if (!cconfig && !sconfig && !rconfig) {
1062 silc_server_disconnect_remote(server, sock,
1063 "Server closed connection: "
1064 "Connection refused");
1065 server->stat.conn_failures++;
1069 /* The connection is allowed */
1071 /* Allocate internal context for key exchange protocol. This is
1072 sent as context for the protocol. */
1073 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1074 proto_ctx->server = context;
1075 proto_ctx->sock = sock;
1076 proto_ctx->rng = server->rng;
1077 proto_ctx->responder = TRUE;
1078 proto_ctx->cconfig = cconfig;
1079 proto_ctx->sconfig = sconfig;
1080 proto_ctx->rconfig = rconfig;
1082 /* Prepare the connection for key exchange protocol. We allocate the
1083 protocol but will not start it yet. The connector will be the
1084 initiator of the protocol thus we will wait for initiation from
1085 there before we start the protocol. */
1086 server->stat.auth_attempts++;
1087 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1088 &sock->protocol, proto_ctx,
1089 silc_server_accept_new_connection_second);
1091 /* Register a timeout task that will be executed if the connector
1092 will not start the key exchange protocol within 60 seconds. For
1093 now, this is a hard coded limit. After 60 secs the connection will
1094 be closed if the key exchange protocol has not been started. */
1095 proto_ctx->timeout_task =
1096 silc_schedule_task_add(server->schedule, sock->sock,
1097 silc_server_timeout_remote,
1103 /* Accepts new connections to the server. Accepting new connections are
1104 done in three parts to make it async. */
1106 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1108 SilcServer server = (SilcServer)context;
1109 SilcSocketConnection newsocket;
1112 SILC_LOG_DEBUG(("Accepting new connection"));
1114 server->stat.conn_attempts++;
1116 sock = silc_net_accept_connection(server->sock);
1118 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1119 server->stat.conn_failures++;
1123 /* Check max connections */
1124 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1125 SILC_LOG_ERROR(("Refusing connection, server is full"));
1126 server->stat.conn_failures++;
1130 /* Set socket options */
1131 silc_net_set_socket_nonblock(sock);
1132 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1134 /* We don't create a ID yet, since we don't know what type of connection
1135 this is yet. But, we do add the connection to the socket table. */
1136 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1137 server->sockets[sock] = newsocket;
1139 /* Perform asynchronous host lookup. This will lookup the IP and the
1140 FQDN of the remote connection. After the lookup is done the connection
1141 is accepted further. */
1142 silc_socket_host_lookup(newsocket, TRUE,
1143 silc_server_accept_new_connection_lookup, context,
1147 /* Second part of accepting new connection. Key exchange protocol has been
1148 performed and now it is time to do little connection authentication
1149 protocol to figure out whether this connection is client or server
1150 and whether it has right to access this server (especially server
1151 connections needs to be authenticated). */
1153 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1155 SilcProtocol protocol = (SilcProtocol)context;
1156 SilcServerKEInternalContext *ctx =
1157 (SilcServerKEInternalContext *)protocol->context;
1158 SilcServer server = (SilcServer)ctx->server;
1159 SilcSocketConnection sock = ctx->sock;
1160 SilcServerConnAuthInternalContext *proto_ctx;
1162 SILC_LOG_DEBUG(("Start"));
1164 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1165 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1166 /* Error occured during protocol */
1167 silc_protocol_free(protocol);
1168 sock->protocol = NULL;
1169 silc_ske_free_key_material(ctx->keymat);
1171 silc_packet_context_free(ctx->packet);
1173 silc_ske_free(ctx->ske);
1174 silc_free(ctx->dest_id);
1176 silc_schedule_task_del_by_callback(server->schedule,
1177 silc_server_failure_callback);
1178 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1179 "Key exchange failed");
1180 server->stat.auth_failures++;
1184 /* We now have the key material as the result of the key exchange
1185 protocol. Take the key material into use. Free the raw key material
1186 as soon as we've set them into use. */
1187 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1188 ctx->sock, ctx->keymat,
1189 ctx->ske->prop->cipher,
1190 ctx->ske->prop->pkcs,
1191 ctx->ske->prop->hash,
1192 ctx->ske->prop->hmac,
1193 ctx->ske->prop->group,
1195 silc_protocol_free(protocol);
1196 sock->protocol = NULL;
1197 silc_ske_free_key_material(ctx->keymat);
1199 silc_packet_context_free(ctx->packet);
1201 silc_ske_free(ctx->ske);
1202 silc_free(ctx->dest_id);
1204 silc_schedule_task_del_by_callback(server->schedule,
1205 silc_server_failure_callback);
1206 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1207 "Key exchange failed");
1208 server->stat.auth_failures++;
1211 silc_ske_free_key_material(ctx->keymat);
1213 /* Allocate internal context for the authentication protocol. This
1214 is sent as context for the protocol. */
1215 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1216 proto_ctx->server = (void *)server;
1217 proto_ctx->sock = sock;
1218 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1219 proto_ctx->responder = TRUE;
1220 proto_ctx->dest_id_type = ctx->dest_id_type;
1221 proto_ctx->dest_id = ctx->dest_id;
1222 proto_ctx->cconfig = ctx->cconfig;
1223 proto_ctx->sconfig = ctx->sconfig;
1224 proto_ctx->rconfig = ctx->rconfig;
1226 /* Free old protocol as it is finished now */
1227 silc_protocol_free(protocol);
1229 silc_packet_context_free(ctx->packet);
1231 sock->protocol = NULL;
1233 /* Allocate the authentication protocol. This is allocated here
1234 but we won't start it yet. We will be receiving party of this
1235 protocol thus we will wait that connecting party will make
1236 their first move. */
1237 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1238 &sock->protocol, proto_ctx,
1239 silc_server_accept_new_connection_final);
1241 /* Register timeout task. If the protocol is not executed inside
1242 this timelimit the connection will be terminated. Currently
1243 this is 60 seconds and is hard coded limit (XXX). */
1244 proto_ctx->timeout_task =
1245 silc_schedule_task_add(server->schedule, sock->sock,
1246 silc_server_timeout_remote,
1247 (void *)server, 60, 0,
1252 /* Final part of accepting new connection. The connection has now
1253 been authenticated and keys has been exchanged. We also know whether
1254 this is client or server connection. */
1256 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1258 SilcProtocol protocol = (SilcProtocol)context;
1259 SilcServerConnAuthInternalContext *ctx =
1260 (SilcServerConnAuthInternalContext *)protocol->context;
1261 SilcServer server = (SilcServer)ctx->server;
1262 SilcSocketConnection sock = ctx->sock;
1263 SilcServerHBContext hb_context;
1264 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1265 void *id_entry = NULL;
1267 SILC_LOG_DEBUG(("Start"));
1269 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1270 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1271 /* Error occured during protocol */
1272 silc_protocol_free(protocol);
1273 sock->protocol = NULL;
1275 silc_packet_context_free(ctx->packet);
1277 silc_ske_free(ctx->ske);
1278 silc_free(ctx->dest_id);
1280 silc_schedule_task_del_by_callback(server->schedule,
1281 silc_server_failure_callback);
1282 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1283 "Authentication failed");
1284 server->stat.auth_failures++;
1288 entry->data.last_receive = time(NULL);
1290 switch (ctx->conn_type) {
1291 case SILC_SOCKET_TYPE_CLIENT:
1293 SilcClientEntry client;
1295 SILC_LOG_DEBUG(("Remote host is client"));
1296 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1299 /* Add the client to the client ID cache. The nickname and Client ID
1300 and other information is created after we have received NEW_CLIENT
1301 packet from client. */
1302 client = silc_idlist_add_client(server->local_list,
1303 NULL, NULL, NULL, NULL, NULL, sock);
1305 SILC_LOG_ERROR(("Could not add new client to cache"));
1306 silc_free(sock->user_data);
1307 silc_server_disconnect_remote(server, sock,
1308 "Server closed connection: "
1309 "Authentication failed");
1310 server->stat.auth_failures++;
1315 server->stat.my_clients++;
1316 server->stat.clients++;
1317 if (server->server_type == SILC_ROUTER)
1318 server->stat.cell_clients++;
1320 id_entry = (void *)client;
1323 case SILC_SOCKET_TYPE_SERVER:
1324 case SILC_SOCKET_TYPE_ROUTER:
1326 SilcServerEntry new_server;
1327 SilcServerConfigSectionServerConnection *conn =
1328 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1329 ctx->sconfig : ctx->rconfig;
1331 SILC_LOG_DEBUG(("Remote host is %s",
1332 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1333 "server" : (conn->backup_router ?
1334 "backup router" : "router")));
1335 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1336 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1337 "server" : (conn->backup_router ?
1338 "backup router" : "router")));
1340 /* Add the server into server cache. The server name and Server ID
1341 is updated after we have received NEW_SERVER packet from the
1342 server. We mark ourselves as router for this server if we really
1345 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1346 server->local_list : (conn->backup_router ?
1347 server->local_list :
1348 server->global_list)),
1350 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1351 SILC_SERVER : SILC_ROUTER),
1353 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1354 server->id_entry : (conn->backup_router ?
1355 server->id_entry : NULL)),
1358 SILC_LOG_ERROR(("Could not add new server to cache"));
1359 silc_free(sock->user_data);
1360 silc_server_disconnect_remote(server, sock,
1361 "Server closed connection: "
1362 "Authentication failed");
1363 server->stat.auth_failures++;
1368 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1369 server->stat.my_servers++;
1371 server->stat.my_routers++;
1372 server->stat.servers++;
1374 id_entry = (void *)new_server;
1376 /* If the incoming connection is router and marked as backup router
1377 then add it to be one of our backups */
1378 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1379 silc_server_backup_add(server, new_server, conn->backup_replace_ip,
1380 conn->backup_replace_port, conn->backup_local);
1382 /* Change it back to SERVER type since that's what it really is. */
1383 if (conn->backup_local)
1384 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1386 new_server->server_type = SILC_BACKUP_ROUTER;
1389 /* Check whether this connection is to be our primary router connection
1390 if we do not already have the primary route. */
1391 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1392 if (silc_server_config_is_primary_route(server->config) &&
1396 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1397 server->standalone = FALSE;
1398 if (!server->id_entry->router) {
1399 server->id_entry->router = id_entry;
1400 server->router = id_entry;
1410 sock->type = ctx->conn_type;
1412 /* Add the common data structure to the ID entry. */
1414 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1416 /* Add to sockets internal pointer for fast referencing */
1417 silc_free(sock->user_data);
1418 sock->user_data = id_entry;
1420 /* Connection has been fully established now. Everything is ok. */
1421 SILC_LOG_DEBUG(("New connection authenticated"));
1423 /* Perform keepalive. The `hb_context' will be freed automatically
1424 when finally calling the silc_socket_free function. XXX hardcoded
1426 hb_context = silc_calloc(1, sizeof(*hb_context));
1427 hb_context->server = server;
1428 silc_socket_set_heartbeat(sock, 600, hb_context,
1429 silc_server_perform_heartbeat,
1433 silc_schedule_task_del_by_callback(server->schedule,
1434 silc_server_failure_callback);
1435 silc_protocol_free(protocol);
1437 silc_packet_context_free(ctx->packet);
1439 silc_ske_free(ctx->ske);
1440 silc_free(ctx->dest_id);
1442 sock->protocol = NULL;
1445 /* This function is used to read packets from network and send packets to
1446 network. This is usually a generic task. */
1448 SILC_TASK_CALLBACK(silc_server_packet_process)
1450 SilcServer server = (SilcServer)context;
1451 SilcSocketConnection sock = server->sockets[fd];
1452 SilcIDListData idata;
1453 SilcCipher cipher = NULL;
1454 SilcHmac hmac = NULL;
1455 uint32 sequence = 0;
1461 SILC_LOG_DEBUG(("Processing packet"));
1463 /* Packet sending */
1465 if (type == SILC_TASK_WRITE) {
1466 /* Do not send data to disconnected connection */
1467 if (SILC_IS_DISCONNECTED(sock))
1470 server->stat.packets_sent++;
1472 if (sock->outbuf->data - sock->outbuf->head)
1473 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1475 /* Send the packet */
1476 ret = silc_packet_send(sock, TRUE);
1478 /* If returned -2 could not write to connection now, will do
1484 SILC_LOG_ERROR(("Error sending packet to connection "
1485 "%s:%d [%s]", sock->hostname, sock->port,
1486 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1487 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1488 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1493 /* The packet has been sent and now it is time to set the connection
1494 back to only for input. When there is again some outgoing data
1495 available for this connection it will be set for output as well.
1496 This call clears the output setting and sets it only for input. */
1497 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1498 SILC_UNSET_OUTBUF_PENDING(sock);
1500 silc_buffer_clear(sock->outbuf);
1504 /* Packet receiving */
1506 /* Read some data from connection */
1507 ret = silc_packet_receive(sock);
1511 SILC_LOG_ERROR(("Error receiving packet from connection "
1512 "%s:%d [%s] %s", sock->hostname, sock->port,
1513 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1514 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1515 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1516 "Router"), strerror(errno)));
1522 SILC_LOG_DEBUG(("Read EOF"));
1524 /* If connection is disconnecting already we will finally
1525 close the connection */
1526 if (SILC_IS_DISCONNECTING(sock)) {
1527 if (sock->user_data)
1528 silc_server_free_sock_user_data(server, sock);
1529 silc_server_close_connection(server, sock);
1533 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1534 SILC_SET_DISCONNECTING(sock);
1536 if (sock->user_data)
1537 silc_server_free_sock_user_data(server, sock);
1538 silc_server_close_connection(server, sock);
1542 /* If connection is disconnecting or disconnected we will ignore
1544 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1545 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1549 server->stat.packets_received++;
1551 /* Get keys and stuff from ID entry */
1552 idata = (SilcIDListData)sock->user_data;
1554 cipher = idata->receive_key;
1555 hmac = idata->hmac_receive;
1556 sequence = idata->psn_receive;
1559 /* Process the packet. This will call the parser that will then
1560 decrypt and parse the packet. */
1561 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1562 TRUE : FALSE, cipher, hmac, sequence,
1563 silc_server_packet_parse, server);
1566 /* Parses whole packet, received earlier. */
1568 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1570 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1571 SilcServer server = (SilcServer)parse_ctx->context;
1572 SilcSocketConnection sock = parse_ctx->sock;
1573 SilcPacketContext *packet = parse_ctx->packet;
1574 SilcIDListData idata = (SilcIDListData)sock->user_data;
1577 SILC_LOG_DEBUG(("Start"));
1579 /* Parse the packet */
1580 if (parse_ctx->normal)
1581 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1583 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1585 /* If entry is disabled ignore what we got. */
1586 if (ret != SILC_PACKET_RESUME_ROUTER &&
1587 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1588 SILC_LOG_DEBUG(("Connection is disabled"));
1592 if (ret == SILC_PACKET_NONE)
1595 /* Check that the the current client ID is same as in the client's packet. */
1596 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1597 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1598 if (client && client->id) {
1599 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1600 packet->src_id_type);
1601 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1609 if (server->server_type == SILC_ROUTER) {
1610 /* Route the packet if it is not destined to us. Other ID types but
1611 server are handled separately after processing them. */
1612 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1613 packet->dst_id_type == SILC_ID_SERVER &&
1614 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1615 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1617 /* Route the packet to fastest route for the destination ID */
1618 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1619 packet->dst_id_type);
1622 silc_server_packet_route(server,
1623 silc_server_route_get(server, id,
1624 packet->dst_id_type),
1631 /* Parse the incoming packet type */
1632 silc_server_packet_parse_type(server, sock, packet);
1634 if (server->server_type == SILC_ROUTER) {
1635 /* Broadcast packet if it is marked as broadcast packet and it is
1636 originated from router and we are router. */
1637 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1638 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1639 !server->standalone) {
1640 /* Broadcast to our primary route */
1641 silc_server_packet_broadcast(server, server->router->connection, packet);
1643 /* If we have backup routers then we need to feed all broadcast
1644 data to those servers. */
1645 silc_server_backup_broadcast(server, sock, packet);
1650 silc_packet_context_free(packet);
1651 silc_free(parse_ctx);
1654 /* Parser callback called by silc_packet_receive_process. This merely
1655 registers timeout that will handle the actual parsing when appropriate. */
1657 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1660 SilcServer server = (SilcServer)context;
1661 SilcSocketConnection sock = parser_context->sock;
1662 SilcIDListData idata = (SilcIDListData)sock->user_data;
1665 idata->psn_receive = parser_context->packet->sequence + 1;
1667 /* If protocol for this connection is key exchange or rekey then we'll
1668 process all packets synchronously, since there might be packets in
1669 queue that we are not able to decrypt without first processing the
1670 packets before them. */
1671 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1672 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1673 (sock->protocol && sock->protocol->protocol &&
1674 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1675 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1676 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1679 /* Reprocess data since we'll return FALSE here. This is because
1680 the idata->receive_key might have become valid in the last packet
1681 and we want to call this processor with valid cipher. */
1683 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1684 TRUE : FALSE, idata->receive_key,
1685 idata->hmac_receive, idata->psn_receive,
1686 silc_server_packet_parse, server);
1688 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1689 TRUE : FALSE, NULL, NULL, 0,
1690 silc_server_packet_parse, server);
1694 switch (sock->type) {
1695 case SILC_SOCKET_TYPE_UNKNOWN:
1696 case SILC_SOCKET_TYPE_CLIENT:
1697 /* Parse the packet with timeout */
1698 silc_schedule_task_add(server->schedule, sock->sock,
1699 silc_server_packet_parse_real,
1700 (void *)parser_context, 0, 100000,
1702 SILC_TASK_PRI_NORMAL);
1704 case SILC_SOCKET_TYPE_SERVER:
1705 case SILC_SOCKET_TYPE_ROUTER:
1706 /* Packets from servers are parsed immediately */
1707 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1717 /* Parses the packet type and calls what ever routines the packet type
1718 requires. This is done for all incoming packets. */
1720 void silc_server_packet_parse_type(SilcServer server,
1721 SilcSocketConnection sock,
1722 SilcPacketContext *packet)
1724 SilcPacketType type = packet->type;
1725 SilcIDListData idata = (SilcIDListData)sock->user_data;
1727 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1729 /* Parse the packet type */
1731 case SILC_PACKET_DISCONNECT:
1732 SILC_LOG_DEBUG(("Disconnect packet"));
1733 if (packet->flags & SILC_PACKET_FLAG_LIST)
1737 case SILC_PACKET_SUCCESS:
1739 * Success received for something. For now we can have only
1740 * one protocol for connection executing at once hence this
1741 * success message is for whatever protocol is executing currently.
1743 SILC_LOG_DEBUG(("Success packet"));
1744 if (packet->flags & SILC_PACKET_FLAG_LIST)
1747 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1750 case SILC_PACKET_FAILURE:
1752 * Failure received for something. For now we can have only
1753 * one protocol for connection executing at once hence this
1754 * failure message is for whatever protocol is executing currently.
1756 SILC_LOG_DEBUG(("Failure packet"));
1757 if (packet->flags & SILC_PACKET_FLAG_LIST)
1759 if (sock->protocol) {
1760 SilcServerFailureContext f;
1761 f = silc_calloc(1, sizeof(*f));
1765 /* We will wait 5 seconds to process this failure packet */
1766 silc_schedule_task_add(server->schedule, sock->sock,
1767 silc_server_failure_callback, (void *)f, 5, 0,
1768 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1772 case SILC_PACKET_REJECT:
1773 SILC_LOG_DEBUG(("Reject packet"));
1774 if (packet->flags & SILC_PACKET_FLAG_LIST)
1779 case SILC_PACKET_NOTIFY:
1781 * Received notify packet. Server can receive notify packets from
1782 * router. Server then relays the notify messages to clients if needed.
1784 SILC_LOG_DEBUG(("Notify packet"));
1785 if (packet->flags & SILC_PACKET_FLAG_LIST)
1786 silc_server_notify_list(server, sock, packet);
1788 silc_server_notify(server, sock, packet);
1794 case SILC_PACKET_CHANNEL_MESSAGE:
1796 * Received channel message. Channel messages are special packets
1797 * (although probably most common ones) thus they are handled
1800 SILC_LOG_DEBUG(("Channel Message packet"));
1801 if (packet->flags & SILC_PACKET_FLAG_LIST)
1803 idata->last_receive = time(NULL);
1804 silc_server_channel_message(server, sock, packet);
1807 case SILC_PACKET_CHANNEL_KEY:
1809 * Received key for channel. As channels are created by the router
1810 * the keys are as well. We will distribute the key to all of our
1811 * locally connected clients on the particular channel. Router
1812 * never receives this channel and thus is ignored.
1814 SILC_LOG_DEBUG(("Channel Key packet"));
1815 if (packet->flags & SILC_PACKET_FLAG_LIST)
1817 silc_server_channel_key(server, sock, packet);
1823 case SILC_PACKET_COMMAND:
1825 * Recived command. Processes the command request and allocates the
1826 * command context and calls the command.
1828 SILC_LOG_DEBUG(("Command packet"));
1829 if (packet->flags & SILC_PACKET_FLAG_LIST)
1831 silc_server_command_process(server, sock, packet);
1834 case SILC_PACKET_COMMAND_REPLY:
1836 * Received command reply packet. Received command reply to command. It
1837 * may be reply to command sent by us or reply to command sent by client
1838 * that we've routed further.
1840 SILC_LOG_DEBUG(("Command Reply packet"));
1841 if (packet->flags & SILC_PACKET_FLAG_LIST)
1843 silc_server_command_reply(server, sock, packet);
1847 * Private Message packets
1849 case SILC_PACKET_PRIVATE_MESSAGE:
1851 * Received private message packet. The packet is coming from either
1854 SILC_LOG_DEBUG(("Private Message packet"));
1855 if (packet->flags & SILC_PACKET_FLAG_LIST)
1857 idata->last_receive = time(NULL);
1858 silc_server_private_message(server, sock, packet);
1861 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1863 * Private message key packet.
1865 if (packet->flags & SILC_PACKET_FLAG_LIST)
1867 silc_server_private_message_key(server, sock, packet);
1871 * Key Exchange protocol packets
1873 case SILC_PACKET_KEY_EXCHANGE:
1874 SILC_LOG_DEBUG(("KE packet"));
1875 if (packet->flags & SILC_PACKET_FLAG_LIST)
1878 if (sock->protocol && sock->protocol->protocol &&
1879 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1881 SilcServerKEInternalContext *proto_ctx =
1882 (SilcServerKEInternalContext *)sock->protocol->context;
1884 proto_ctx->packet = silc_packet_context_dup(packet);
1886 /* Let the protocol handle the packet */
1887 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1889 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1890 "protocol active, packet dropped."));
1894 case SILC_PACKET_KEY_EXCHANGE_1:
1895 SILC_LOG_DEBUG(("KE 1 packet"));
1896 if (packet->flags & SILC_PACKET_FLAG_LIST)
1899 if (sock->protocol && sock->protocol->protocol &&
1900 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1901 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1903 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1904 SilcServerRekeyInternalContext *proto_ctx =
1905 (SilcServerRekeyInternalContext *)sock->protocol->context;
1907 if (proto_ctx->packet)
1908 silc_packet_context_free(proto_ctx->packet);
1910 proto_ctx->packet = silc_packet_context_dup(packet);
1912 /* Let the protocol handle the packet */
1913 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1915 SilcServerKEInternalContext *proto_ctx =
1916 (SilcServerKEInternalContext *)sock->protocol->context;
1918 if (proto_ctx->packet)
1919 silc_packet_context_free(proto_ctx->packet);
1921 proto_ctx->packet = silc_packet_context_dup(packet);
1922 proto_ctx->dest_id_type = packet->src_id_type;
1923 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1924 packet->src_id_type);
1925 if (!proto_ctx->dest_id)
1928 /* Let the protocol handle the packet */
1929 silc_protocol_execute(sock->protocol, server->schedule,
1933 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1934 "protocol active, packet dropped."));
1938 case SILC_PACKET_KEY_EXCHANGE_2:
1939 SILC_LOG_DEBUG(("KE 2 packet"));
1940 if (packet->flags & SILC_PACKET_FLAG_LIST)
1943 if (sock->protocol && sock->protocol->protocol &&
1944 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1945 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1947 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1948 SilcServerRekeyInternalContext *proto_ctx =
1949 (SilcServerRekeyInternalContext *)sock->protocol->context;
1951 if (proto_ctx->packet)
1952 silc_packet_context_free(proto_ctx->packet);
1954 proto_ctx->packet = silc_packet_context_dup(packet);
1956 /* Let the protocol handle the packet */
1957 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1959 SilcServerKEInternalContext *proto_ctx =
1960 (SilcServerKEInternalContext *)sock->protocol->context;
1962 if (proto_ctx->packet)
1963 silc_packet_context_free(proto_ctx->packet);
1965 proto_ctx->packet = silc_packet_context_dup(packet);
1966 proto_ctx->dest_id_type = packet->src_id_type;
1967 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1968 packet->src_id_type);
1969 if (!proto_ctx->dest_id)
1972 /* Let the protocol handle the packet */
1973 silc_protocol_execute(sock->protocol, server->schedule,
1977 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1978 "protocol active, packet dropped."));
1982 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1984 * Connection authentication request packet. When we receive this packet
1985 * we will send to the other end information about our mandatory
1986 * authentication method for the connection. This packet maybe received
1989 SILC_LOG_DEBUG(("Connection authentication request packet"));
1990 if (packet->flags & SILC_PACKET_FLAG_LIST)
1992 silc_server_connection_auth_request(server, sock, packet);
1996 * Connection Authentication protocol packets
1998 case SILC_PACKET_CONNECTION_AUTH:
1999 /* Start of the authentication protocol. We receive here the
2000 authentication data and will verify it. */
2001 SILC_LOG_DEBUG(("Connection auth packet"));
2002 if (packet->flags & SILC_PACKET_FLAG_LIST)
2005 if (sock->protocol && sock->protocol->protocol->type
2006 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2008 SilcServerConnAuthInternalContext *proto_ctx =
2009 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2011 proto_ctx->packet = silc_packet_context_dup(packet);
2013 /* Let the protocol handle the packet */
2014 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2016 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2017 "protocol active, packet dropped."));
2021 case SILC_PACKET_NEW_ID:
2023 * Received New ID packet. This includes some new ID that has been
2024 * created. It may be for client, server or channel. This is the way
2025 * to distribute information about new registered entities in the
2028 SILC_LOG_DEBUG(("New ID packet"));
2029 if (packet->flags & SILC_PACKET_FLAG_LIST)
2030 silc_server_new_id_list(server, sock, packet);
2032 silc_server_new_id(server, sock, packet);
2035 case SILC_PACKET_NEW_CLIENT:
2037 * Received new client packet. This includes client information that
2038 * we will use to create initial client ID. After creating new
2039 * ID we will send it to the client.
2041 SILC_LOG_DEBUG(("New Client packet"));
2042 if (packet->flags & SILC_PACKET_FLAG_LIST)
2044 silc_server_new_client(server, sock, packet);
2047 case SILC_PACKET_NEW_SERVER:
2049 * Received new server packet. This includes Server ID and some other
2050 * information that we may save. This is received after server has
2053 SILC_LOG_DEBUG(("New Server packet"));
2054 if (packet->flags & SILC_PACKET_FLAG_LIST)
2056 silc_server_new_server(server, sock, packet);
2059 case SILC_PACKET_NEW_CHANNEL:
2061 * Received new channel packet. Information about new channel in the
2062 * network are distributed using this packet.
2064 SILC_LOG_DEBUG(("New Channel packet"));
2065 if (packet->flags & SILC_PACKET_FLAG_LIST)
2066 silc_server_new_channel_list(server, sock, packet);
2068 silc_server_new_channel(server, sock, packet);
2071 case SILC_PACKET_HEARTBEAT:
2073 * Received heartbeat.
2075 SILC_LOG_DEBUG(("Heartbeat packet"));
2076 if (packet->flags & SILC_PACKET_FLAG_LIST)
2080 case SILC_PACKET_KEY_AGREEMENT:
2082 * Received heartbeat.
2084 SILC_LOG_DEBUG(("Key agreement packet"));
2085 if (packet->flags & SILC_PACKET_FLAG_LIST)
2087 silc_server_key_agreement(server, sock, packet);
2090 case SILC_PACKET_REKEY:
2092 * Received re-key packet. The sender wants to regenerate the session
2095 SILC_LOG_DEBUG(("Re-key packet"));
2096 if (packet->flags & SILC_PACKET_FLAG_LIST)
2098 silc_server_rekey(server, sock, packet);
2101 case SILC_PACKET_REKEY_DONE:
2103 * The re-key is done.
2105 SILC_LOG_DEBUG(("Re-key done packet"));
2106 if (packet->flags & SILC_PACKET_FLAG_LIST)
2109 if (sock->protocol && sock->protocol->protocol &&
2110 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2112 SilcServerRekeyInternalContext *proto_ctx =
2113 (SilcServerRekeyInternalContext *)sock->protocol->context;
2115 if (proto_ctx->packet)
2116 silc_packet_context_free(proto_ctx->packet);
2118 proto_ctx->packet = silc_packet_context_dup(packet);
2120 /* Let the protocol handle the packet */
2121 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2123 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2124 "protocol active, packet dropped."));
2128 case SILC_PACKET_FTP:
2130 SILC_LOG_DEBUG(("FTP packet"));
2131 if (packet->flags & SILC_PACKET_FLAG_LIST)
2133 silc_server_ftp(server, sock, packet);
2136 case SILC_PACKET_RESUME_ROUTER:
2137 /* Resume router packet received. This packet is received for backup
2138 router resuming protocol. */
2139 SILC_LOG_DEBUG(("Resume router packet"));
2140 if (packet->flags & SILC_PACKET_FLAG_LIST)
2142 silc_server_backup_resume_router(server, sock, packet);
2146 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2152 /* Creates connection to a remote router. */
2154 void silc_server_create_connection(SilcServer server,
2155 char *remote_host, uint32 port)
2157 SilcServerConnection sconn;
2159 /* Allocate connection object for hold connection specific stuff. */
2160 sconn = silc_calloc(1, sizeof(*sconn));
2161 sconn->server = server;
2162 sconn->remote_host = strdup(remote_host);
2163 sconn->remote_port = port;
2165 silc_schedule_task_add(server->schedule, 0,
2166 silc_server_connect_router,
2167 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2168 SILC_TASK_PRI_NORMAL);
2171 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2173 silc_socket_free((SilcSocketConnection)context);
2176 /* Closes connection to socket connection */
2178 void silc_server_close_connection(SilcServer server,
2179 SilcSocketConnection sock)
2181 if (!server->sockets[sock->sock])
2184 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2186 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2187 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2188 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2191 /* We won't listen for this connection anymore */
2192 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2194 /* Unregister all tasks */
2195 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2197 /* Close the actual connection */
2198 silc_net_close_connection(sock->sock);
2199 server->sockets[sock->sock] = NULL;
2201 /* If sock->user_data is NULL then we'll check for active protocols
2202 here since the silc_server_free_sock_user_data has not been called
2203 for this connection. */
2204 if (!sock->user_data) {
2205 /* If any protocol is active cancel its execution. It will call
2206 the final callback which will finalize the disconnection. */
2207 if (sock->protocol) {
2208 silc_protocol_cancel(sock->protocol, server->schedule);
2209 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2210 silc_protocol_execute_final(sock->protocol, server->schedule);
2211 sock->protocol = NULL;
2216 silc_schedule_task_add(server->schedule, 0,
2217 silc_server_close_connection_final,
2218 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2219 SILC_TASK_PRI_NORMAL);
2222 /* Sends disconnect message to remote connection and disconnects the
2225 void silc_server_disconnect_remote(SilcServer server,
2226 SilcSocketConnection sock,
2227 const char *fmt, ...)
2230 unsigned char buf[4096];
2235 memset(buf, 0, sizeof(buf));
2237 vsprintf(buf, fmt, ap);
2240 SILC_LOG_DEBUG(("Disconnecting remote host"));
2242 /* Notify remote end that the conversation is over. The notify message
2243 is tried to be sent immediately. */
2244 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2245 buf, strlen(buf), TRUE);
2247 /* Mark the connection to be disconnected */
2248 SILC_SET_DISCONNECTED(sock);
2249 silc_server_close_connection(server, sock);
2254 SilcClientEntry client;
2255 } *FreeClientInternal;
2257 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2259 FreeClientInternal i = (FreeClientInternal)context;
2261 silc_idlist_del_data(i->client);
2262 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2266 /* Frees client data and notifies about client's signoff. */
2268 void silc_server_free_client_data(SilcServer server,
2269 SilcSocketConnection sock,
2270 SilcClientEntry client,
2274 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2276 /* If there is pending outgoing data for the client then purge it
2277 to the network before removing the client entry. */
2278 silc_server_packet_queue_purge(server, sock);
2283 /* Send SIGNOFF notify to routers. */
2284 if (notify && !server->standalone && server->router)
2285 silc_server_send_notify_signoff(server, server->router->connection,
2286 server->server_type == SILC_SERVER ?
2287 FALSE : TRUE, client->id, signoff);
2289 /* Remove client from all channels */
2291 silc_server_remove_from_channels(server, NULL, client,
2292 TRUE, signoff, TRUE);
2294 silc_server_remove_from_channels(server, NULL, client,
2295 FALSE, NULL, FALSE);
2297 /* We will not delete the client entry right away. We will take it
2298 into history (for WHOWAS command) for 5 minutes */
2301 silc_schedule_task_add(server->schedule, 0,
2302 silc_server_free_client_data_timeout,
2304 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2305 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2306 client->router = NULL;
2307 client->connection = NULL;
2309 /* Free the client entry and everything in it */
2310 server->stat.my_clients--;
2311 server->stat.clients--;
2312 if (server->server_type == SILC_ROUTER)
2313 server->stat.cell_clients--;
2316 /* Frees user_data pointer from socket connection object. This also sends
2317 appropriate notify packets to the network to inform about leaving
2320 void silc_server_free_sock_user_data(SilcServer server,
2321 SilcSocketConnection sock)
2323 SILC_LOG_DEBUG(("Start"));
2325 switch (sock->type) {
2326 case SILC_SOCKET_TYPE_CLIENT:
2328 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2329 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2332 case SILC_SOCKET_TYPE_SERVER:
2333 case SILC_SOCKET_TYPE_ROUTER:
2335 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2336 SilcServerEntry backup_router = NULL;
2339 backup_router = silc_server_backup_get(server, user_data->id);
2341 /* If this was our primary router connection then we're lost to
2342 the outside world. */
2343 if (server->router == user_data) {
2344 /* Check whether we have a backup router connection */
2345 if (!backup_router || backup_router == user_data) {
2346 silc_schedule_task_add(server->schedule, 0,
2347 silc_server_connect_to_router,
2350 SILC_TASK_PRI_NORMAL);
2352 server->id_entry->router = NULL;
2353 server->router = NULL;
2354 server->standalone = TRUE;
2355 backup_router = NULL;
2357 SILC_LOG_INFO(("New primary router is backup router %s",
2358 backup_router->server_name));
2359 SILC_LOG_DEBUG(("New primary router is backup router %s",
2360 backup_router->server_name));
2361 server->id_entry->router = backup_router;
2362 server->router = backup_router;
2363 server->router_connect = time(0);
2364 server->backup_primary = TRUE;
2365 if (server->server_type == SILC_BACKUP_ROUTER) {
2366 server->server_type = SILC_ROUTER;
2368 /* We'll need to constantly try to reconnect to the primary
2369 router so that we'll see when it comes back online. */
2370 silc_server_backup_reconnect(server, sock->ip, sock->port,
2371 silc_server_backup_connected,
2375 /* Mark this connection as replaced */
2376 silc_server_backup_replaced_add(server, user_data->id,
2379 } else if (backup_router) {
2380 SILC_LOG_INFO(("Enabling the use of backup router %s",
2381 backup_router->server_name));
2382 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2383 backup_router->server_name));
2385 /* Mark this connection as replaced */
2386 silc_server_backup_replaced_add(server, user_data->id,
2390 if (!backup_router) {
2391 /* Free all client entries that this server owns as they will
2392 become invalid now as well. */
2394 silc_server_remove_clients_by_server(server, user_data, TRUE);
2395 if (server->server_type == SILC_SERVER)
2396 silc_server_remove_channels_by_server(server, user_data);
2398 /* Update the client entries of this server to the new backup
2399 router. This also removes the clients that *really* was owned
2400 by the primary router and went down with the router. */
2401 silc_server_update_clients_by_server(server, user_data, backup_router,
2403 silc_server_update_servers_by_server(server, user_data, backup_router);
2404 if (server->server_type == SILC_SERVER)
2405 silc_server_update_channels_by_server(server, user_data,
2409 /* Free the server entry */
2410 silc_server_backup_del(server, user_data);
2411 silc_server_backup_replaced_del(server, user_data);
2412 silc_idlist_del_data(user_data);
2413 if (!silc_idlist_del_server(server->local_list, user_data))
2414 silc_idlist_del_server(server->global_list, user_data);
2415 server->stat.my_servers--;
2416 server->stat.servers--;
2417 if (server->server_type == SILC_ROUTER)
2418 server->stat.cell_servers--;
2420 if (backup_router) {
2421 /* Announce all of our stuff that was created about 5 minutes ago.
2422 The backup router knows all the other stuff already. */
2423 if (server->server_type == SILC_ROUTER)
2424 silc_server_announce_servers(server, FALSE, time(0) - 300,
2425 backup_router->connection);
2427 /* Announce our clients and channels to the router */
2428 silc_server_announce_clients(server, time(0) - 300,
2429 backup_router->connection);
2430 silc_server_announce_channels(server, time(0) - 300,
2431 backup_router->connection);
2437 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2439 silc_idlist_del_data(user_data);
2440 silc_free(user_data);
2445 /* If any protocol is active cancel its execution */
2446 if (sock->protocol) {
2447 silc_protocol_cancel(sock->protocol, server->schedule);
2448 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2449 silc_protocol_execute_final(sock->protocol, server->schedule);
2450 sock->protocol = NULL;
2453 sock->user_data = NULL;
2456 /* Removes client from all channels it has joined. This is used when client
2457 connection is disconnected. If the client on a channel is last, the
2458 channel is removed as well. This sends the SIGNOFF notify types. */
2460 void silc_server_remove_from_channels(SilcServer server,
2461 SilcSocketConnection sock,
2462 SilcClientEntry client,
2464 char *signoff_message,
2467 SilcChannelEntry channel;
2468 SilcChannelClientEntry chl;
2469 SilcHashTableList htl;
2472 SILC_LOG_DEBUG(("Start"));
2474 if (!client || !client->id)
2477 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2479 /* Remove the client from all channels. The client is removed from
2480 the channels' user list. */
2481 silc_hash_table_list(client->channels, &htl);
2482 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2483 channel = chl->channel;
2485 /* Remove channel from client's channel list */
2486 silc_hash_table_del(client->channels, channel);
2488 /* Remove channel if there is no users anymore */
2489 if (server->server_type == SILC_ROUTER &&
2490 silc_hash_table_count(channel->user_list) < 2) {
2492 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2493 if (silc_idlist_del_channel(server->local_list, channel))
2494 server->stat.my_channels--;
2496 silc_idlist_del_channel(server->global_list, channel);
2500 /* Remove client from channel's client list */
2501 silc_hash_table_del(channel->user_list, chl->client);
2503 /* If there is no global users on the channel anymore mark the channel
2504 as local channel. Do not check if the removed client is local client. */
2505 if (server->server_type != SILC_ROUTER && channel->global_users &&
2506 chl->client->router && !silc_server_channel_has_global(channel))
2507 channel->global_users = FALSE;
2510 server->stat.my_chanclients--;
2512 /* If there is not at least one local user on the channel then we don't
2513 need the channel entry anymore, we can remove it safely. */
2514 if (server->server_type != SILC_ROUTER &&
2515 !silc_server_channel_has_local(channel)) {
2516 /* Notify about leaving client if this channel has global users. */
2517 if (notify && channel->global_users)
2518 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2519 SILC_NOTIFY_TYPE_SIGNOFF,
2520 signoff_message ? 2 : 1,
2521 clidp->data, clidp->len,
2522 signoff_message, signoff_message ?
2523 strlen(signoff_message) : 0);
2526 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2528 if (channel->founder_key) {
2529 /* The founder auth data exists, do not remove the channel entry */
2530 SilcChannelClientEntry chl2;
2531 SilcHashTableList htl2;
2533 channel->disabled = TRUE;
2535 silc_hash_table_list(channel->user_list, &htl2);
2536 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2537 silc_hash_table_del(chl2->client->channels, channel);
2538 silc_hash_table_del(channel->user_list, chl2->client);
2544 /* Remove the channel entry */
2545 if (silc_idlist_del_channel(server->local_list, channel))
2546 server->stat.my_channels--;
2548 silc_idlist_del_channel(server->global_list, channel);
2552 /* Send notify to channel about client leaving SILC and thus
2553 the entire channel. */
2555 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2556 SILC_NOTIFY_TYPE_SIGNOFF,
2557 signoff_message ? 2 : 1,
2558 clidp->data, clidp->len,
2559 signoff_message, signoff_message ?
2560 strlen(signoff_message) : 0);
2562 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2563 /* Re-generate channel key */
2564 if (!silc_server_create_channel_key(server, channel, 0))
2567 /* Send the channel key to the channel. The key of course is not sent
2568 to the client who was removed from the channel. */
2569 silc_server_send_channel_key(server, client->connection, channel,
2570 server->server_type == SILC_ROUTER ?
2571 FALSE : !server->standalone);
2575 silc_buffer_free(clidp);
2578 /* Removes client from one channel. This is used for example when client
2579 calls LEAVE command to remove itself from the channel. Returns TRUE
2580 if channel still exists and FALSE if the channel is removed when
2581 last client leaves the channel. If `notify' is FALSE notify messages
2584 int silc_server_remove_from_one_channel(SilcServer server,
2585 SilcSocketConnection sock,
2586 SilcChannelEntry channel,
2587 SilcClientEntry client,
2590 SilcChannelClientEntry chl;
2593 SILC_LOG_DEBUG(("Start"));
2595 /* Get the entry to the channel, if this client is not on the channel
2597 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2600 /* Remove the client from the channel. The client is removed from
2601 the channel's user list. */
2603 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2605 /* Remove channel from client's channel list */
2606 silc_hash_table_del(client->channels, chl->channel);
2608 /* Remove channel if there is no users anymore */
2609 if (server->server_type == SILC_ROUTER &&
2610 silc_hash_table_count(channel->user_list) < 2) {
2612 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2613 if (silc_idlist_del_channel(server->local_list, channel))
2614 server->stat.my_channels--;
2616 silc_idlist_del_channel(server->global_list, channel);
2617 silc_buffer_free(clidp);
2621 /* Remove client from channel's client list */
2622 silc_hash_table_del(channel->user_list, chl->client);
2624 /* If there is no global users on the channel anymore mark the channel
2625 as local channel. Do not check if the client is local client. */
2626 if (server->server_type != SILC_ROUTER && channel->global_users &&
2627 chl->client->router && !silc_server_channel_has_global(channel))
2628 channel->global_users = FALSE;
2631 server->stat.my_chanclients--;
2633 /* If there is not at least one local user on the channel then we don't
2634 need the channel entry anymore, we can remove it safely. */
2635 if (server->server_type != SILC_ROUTER &&
2636 !silc_server_channel_has_local(channel)) {
2637 /* Notify about leaving client if this channel has global users. */
2638 if (notify && channel->global_users)
2639 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2640 SILC_NOTIFY_TYPE_LEAVE, 1,
2641 clidp->data, clidp->len);
2643 silc_buffer_free(clidp);
2646 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2648 if (channel->founder_key) {
2649 /* The founder auth data exists, do not remove the channel entry */
2650 SilcChannelClientEntry chl2;
2651 SilcHashTableList htl2;
2653 channel->disabled = TRUE;
2655 silc_hash_table_list(channel->user_list, &htl2);
2656 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2657 silc_hash_table_del(chl2->client->channels, channel);
2658 silc_hash_table_del(channel->user_list, chl2->client);
2664 /* Remove the channel entry */
2665 if (silc_idlist_del_channel(server->local_list, channel))
2666 server->stat.my_channels--;
2668 silc_idlist_del_channel(server->global_list, channel);
2672 /* Send notify to channel about client leaving the channel */
2674 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2675 SILC_NOTIFY_TYPE_LEAVE, 1,
2676 clidp->data, clidp->len);
2678 silc_buffer_free(clidp);
2682 /* Timeout callback. This is called if connection is idle or for some
2683 other reason is not responding within some period of time. This
2684 disconnects the remote end. */
2686 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2688 SilcServer server = (SilcServer)context;
2689 SilcSocketConnection sock = server->sockets[fd];
2691 SILC_LOG_DEBUG(("Start"));
2696 /* If we have protocol active we must assure that we call the protocol's
2697 final callback so that all the memory is freed. */
2698 if (sock->protocol) {
2699 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2700 silc_protocol_execute_final(sock->protocol, server->schedule);
2704 if (sock->user_data)
2705 silc_server_free_sock_user_data(server, sock);
2707 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2708 "Connection timeout");
2711 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2712 function may be used only by router. In real SILC network all channels
2713 are created by routers thus this function is never used by normal
2716 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2717 SilcServerID *router_id,
2723 SilcChannelID *channel_id;
2724 SilcChannelEntry entry;
2728 SILC_LOG_DEBUG(("Creating new channel"));
2731 cipher = SILC_DEFAULT_CIPHER;
2733 hmac = SILC_DEFAULT_HMAC;
2735 /* Allocate cipher */
2736 if (!silc_cipher_alloc(cipher, &key))
2740 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2741 silc_cipher_free(key);
2745 channel_name = strdup(channel_name);
2747 /* Create the channel */
2748 if (!silc_id_create_channel_id(server, router_id, server->rng,
2750 silc_free(channel_name);
2751 silc_cipher_free(key);
2752 silc_hmac_free(newhmac);
2755 entry = silc_idlist_add_channel(server->local_list, channel_name,
2756 SILC_CHANNEL_MODE_NONE, channel_id,
2757 NULL, key, newhmac);
2759 silc_free(channel_name);
2760 silc_cipher_free(key);
2761 silc_hmac_free(newhmac);
2765 entry->cipher = strdup(cipher);
2766 entry->hmac_name = strdup(hmac);
2768 /* Now create the actual key material */
2769 if (!silc_server_create_channel_key(server, entry,
2770 silc_cipher_get_key_len(key) / 8)) {
2771 silc_free(channel_name);
2772 silc_cipher_free(key);
2773 silc_hmac_free(newhmac);
2774 silc_free(entry->cipher);
2775 silc_free(entry->hmac_name);
2779 /* Notify other routers about the new channel. We send the packet
2780 to our primary route. */
2781 if (broadcast && server->standalone == FALSE)
2782 silc_server_send_new_channel(server, server->router->connection, TRUE,
2783 channel_name, entry->id,
2784 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2787 server->stat.my_channels++;
2792 /* Same as above but creates the channel with Channel ID `channel_id. */
2795 silc_server_create_new_channel_with_id(SilcServer server,
2799 SilcChannelID *channel_id,
2802 SilcChannelEntry entry;
2806 SILC_LOG_DEBUG(("Creating new channel"));
2809 cipher = SILC_DEFAULT_CIPHER;
2811 hmac = SILC_DEFAULT_HMAC;
2813 /* Allocate cipher */
2814 if (!silc_cipher_alloc(cipher, &key))
2818 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2819 silc_cipher_free(key);
2823 channel_name = strdup(channel_name);
2825 /* Create the channel */
2826 entry = silc_idlist_add_channel(server->local_list, channel_name,
2827 SILC_CHANNEL_MODE_NONE, channel_id,
2828 NULL, key, newhmac);
2830 silc_free(channel_name);
2834 /* Now create the actual key material */
2835 if (!silc_server_create_channel_key(server, entry,
2836 silc_cipher_get_key_len(key) / 8)) {
2837 silc_free(channel_name);
2841 /* Notify other routers about the new channel. We send the packet
2842 to our primary route. */
2843 if (broadcast && server->standalone == FALSE)
2844 silc_server_send_new_channel(server, server->router->connection, TRUE,
2845 channel_name, entry->id,
2846 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2849 server->stat.my_channels++;
2854 /* Channel's key re-key timeout callback. */
2856 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2858 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2859 SilcServer server = (SilcServer)rekey->context;
2863 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2866 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2869 /* Generates new channel key. This is used to create the initial channel key
2870 but also to re-generate new key for channel. If `key_len' is provided
2871 it is the bytes of the key length. */
2873 bool silc_server_create_channel_key(SilcServer server,
2874 SilcChannelEntry channel,
2878 unsigned char channel_key[32], hash[32];
2881 SILC_LOG_DEBUG(("Generating channel key"));
2883 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2884 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2888 if (!channel->channel_key)
2889 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
2890 channel->channel_key = NULL;
2896 else if (channel->key_len)
2897 len = channel->key_len / 8;
2899 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2901 /* Create channel key */
2902 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2905 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2907 /* Remove old key if exists */
2909 memset(channel->key, 0, channel->key_len / 8);
2910 silc_free(channel->key);
2914 channel->key_len = len * 8;
2915 channel->key = silc_calloc(len, sizeof(*channel->key));
2916 memcpy(channel->key, channel_key, len);
2917 memset(channel_key, 0, sizeof(channel_key));
2919 /* Generate HMAC key from the channel key data and set it */
2921 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2922 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2923 silc_hmac_set_key(channel->hmac, hash,
2924 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2925 memset(hash, 0, sizeof(hash));
2927 if (server->server_type == SILC_ROUTER) {
2928 if (!channel->rekey)
2929 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2930 channel->rekey->context = (void *)server;
2931 channel->rekey->channel = channel;
2932 channel->rekey->key_len = key_len;
2933 if (channel->rekey->task)
2934 silc_schedule_task_del(server->schedule, channel->rekey->task);
2936 channel->rekey->task =
2937 silc_schedule_task_add(server->schedule, 0,
2938 silc_server_channel_key_rekey,
2939 (void *)channel->rekey, 3600, 0,
2941 SILC_TASK_PRI_NORMAL);
2947 /* Saves the channel key found in the encoded `key_payload' buffer. This
2948 function is used when we receive Channel Key Payload and also when we're
2949 processing JOIN command reply. Returns entry to the channel. */
2951 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2952 SilcBuffer key_payload,
2953 SilcChannelEntry channel)
2955 SilcChannelKeyPayload payload = NULL;
2956 SilcChannelID *id = NULL;
2957 unsigned char *tmp, hash[32];
2961 SILC_LOG_DEBUG(("Start"));
2963 /* Decode channel key payload */
2964 payload = silc_channel_key_payload_parse(key_payload);
2966 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2971 /* Get the channel entry */
2974 /* Get channel ID */
2975 tmp = silc_channel_key_get_id(payload, &tmp_len);
2976 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2982 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2984 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2986 SILC_LOG_ERROR(("Received key for non-existent channel"));
2992 tmp = silc_channel_key_get_key(payload, &tmp_len);
2998 cipher = silc_channel_key_get_cipher(payload, NULL);
3004 /* Remove old key if exists */
3006 memset(channel->key, 0, channel->key_len / 8);
3007 silc_free(channel->key);
3008 silc_cipher_free(channel->channel_key);
3011 /* Create new cipher */
3012 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3013 channel->channel_key = NULL;
3018 if (channel->cipher)
3019 silc_free(channel->cipher);
3020 channel->cipher = strdup(cipher);
3023 channel->key_len = tmp_len * 8;
3024 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3025 memcpy(channel->key, tmp, tmp_len);
3026 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3028 /* Generate HMAC key from the channel key data and set it */
3030 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3031 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3032 silc_hmac_set_key(channel->hmac, hash,
3033 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3035 memset(hash, 0, sizeof(hash));
3036 memset(tmp, 0, tmp_len);
3038 if (server->server_type == SILC_ROUTER) {
3039 if (!channel->rekey)
3040 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3041 channel->rekey->context = (void *)server;
3042 channel->rekey->channel = channel;
3043 if (channel->rekey->task)
3044 silc_schedule_task_del(server->schedule, channel->rekey->task);
3046 channel->rekey->task =
3047 silc_schedule_task_add(server->schedule, 0,
3048 silc_server_channel_key_rekey,
3049 (void *)channel->rekey, 3600, 0,
3051 SILC_TASK_PRI_NORMAL);
3057 silc_channel_key_payload_free(payload);
3062 /* Heartbeat callback. This function is set as argument for the
3063 silc_socket_set_heartbeat function. The library will call this function
3064 at the set time interval. */
3066 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3069 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3071 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3074 /* Send the heartbeat */
3075 silc_server_send_heartbeat(hb->server, sock);
3078 /* Returns assembled of all servers in the given ID list. The packet's
3079 form is dictated by the New ID payload. */
3081 static void silc_server_announce_get_servers(SilcServer server,
3082 SilcServerEntry remote,
3084 SilcBuffer *servers,
3085 unsigned long creation_time)
3087 SilcIDCacheList list;
3088 SilcIDCacheEntry id_cache;
3089 SilcServerEntry entry;
3092 /* Go through all clients in the list */
3093 if (silc_idcache_get_all(id_list->servers, &list)) {
3094 if (silc_idcache_list_first(list, &id_cache)) {
3096 entry = (SilcServerEntry)id_cache->context;
3098 /* Do not announce the one we've sending our announcements and
3099 do not announce ourself. Also check the creation time if it's
3101 if ((entry == remote) || (entry == server->id_entry) ||
3102 (creation_time && entry->data.created < creation_time)) {
3103 if (!silc_idcache_list_next(list, &id_cache))
3108 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3110 *servers = silc_buffer_realloc(*servers,
3112 (*servers)->truelen + idp->len :
3114 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3115 silc_buffer_put(*servers, idp->data, idp->len);
3116 silc_buffer_pull(*servers, idp->len);
3117 silc_buffer_free(idp);
3119 if (!silc_idcache_list_next(list, &id_cache))
3124 silc_idcache_list_free(list);
3128 /* This function is used by router to announce existing servers to our
3129 primary router when we've connected to it. If `creation_time' is non-zero
3130 then only the servers that has been created after the `creation_time'
3131 will be announced. */
3133 void silc_server_announce_servers(SilcServer server, bool global,
3134 unsigned long creation_time,
3135 SilcSocketConnection remote)
3137 SilcBuffer servers = NULL;
3139 SILC_LOG_DEBUG(("Announcing servers"));
3141 /* Get servers in local list */
3142 silc_server_announce_get_servers(server, remote->user_data,
3143 server->local_list, &servers,
3147 /* Get servers in global list */
3148 silc_server_announce_get_servers(server, remote->user_data,
3149 server->global_list, &servers,
3153 silc_buffer_push(servers, servers->data - servers->head);
3154 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3156 /* Send the packet */
3157 silc_server_packet_send(server, remote,
3158 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3159 servers->data, servers->len, TRUE);
3161 silc_buffer_free(servers);
3165 /* Returns assembled packet of all clients in the given ID list. The
3166 packet's form is dictated by the New ID Payload. */
3168 static void silc_server_announce_get_clients(SilcServer server,
3170 SilcBuffer *clients,
3171 unsigned long creation_time)
3173 SilcIDCacheList list;
3174 SilcIDCacheEntry id_cache;
3175 SilcClientEntry client;
3178 /* Go through all clients in the list */
3179 if (silc_idcache_get_all(id_list->clients, &list)) {
3180 if (silc_idcache_list_first(list, &id_cache)) {
3182 client = (SilcClientEntry)id_cache->context;
3184 if (creation_time && client->data.created < creation_time) {
3185 if (!silc_idcache_list_next(list, &id_cache))
3190 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3192 *clients = silc_buffer_realloc(*clients,
3194 (*clients)->truelen + idp->len :
3196 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3197 silc_buffer_put(*clients, idp->data, idp->len);
3198 silc_buffer_pull(*clients, idp->len);
3199 silc_buffer_free(idp);
3201 if (!silc_idcache_list_next(list, &id_cache))
3206 silc_idcache_list_free(list);
3210 /* This function is used to announce our existing clients to our router
3211 when we've connected to it. If `creation_time' is non-zero then only
3212 the clients that has been created after the `creation_time' will be
3215 void silc_server_announce_clients(SilcServer server,
3216 unsigned long creation_time,
3217 SilcSocketConnection remote)
3219 SilcBuffer clients = NULL;
3221 SILC_LOG_DEBUG(("Announcing clients"));
3223 /* Get clients in local list */
3224 silc_server_announce_get_clients(server, server->local_list,
3225 &clients, creation_time);
3227 /* As router we announce our global list as well */
3228 if (server->server_type == SILC_ROUTER)
3229 silc_server_announce_get_clients(server, server->global_list,
3230 &clients, creation_time);
3233 silc_buffer_push(clients, clients->data - clients->head);
3234 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3236 /* Send the packet */
3237 silc_server_packet_send(server, remote,
3238 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3239 clients->data, clients->len, TRUE);
3241 silc_buffer_free(clients);
3246 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3252 p = silc_notify_payload_encode(notify, argc, ap);
3258 /* Returns assembled packets for channel users of the `channel'. */
3260 void silc_server_announce_get_channel_users(SilcServer server,
3261 SilcChannelEntry channel,
3262 SilcBuffer *channel_users,
3263 SilcBuffer *channel_users_modes)
3265 SilcChannelClientEntry chl;
3266 SilcHashTableList htl;
3267 SilcBuffer chidp, clidp;
3270 unsigned char mode[4];
3272 SILC_LOG_DEBUG(("Start"));
3274 /* Now find all users on the channel */
3275 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3276 silc_hash_table_list(channel->user_list, &htl);
3277 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3278 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3281 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3282 clidp->data, clidp->len,
3283 chidp->data, chidp->len);
3286 silc_buffer_realloc(*channel_users,
3288 (*channel_users)->truelen + len : len));
3289 silc_buffer_pull_tail(*channel_users,
3290 ((*channel_users)->end -
3291 (*channel_users)->data));
3293 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3294 silc_buffer_pull(*channel_users, len);
3295 silc_buffer_free(tmp);
3297 /* CUMODE notify for mode change on the channel */
3298 SILC_PUT32_MSB(chl->mode, mode);
3299 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3300 3, clidp->data, clidp->len,
3302 clidp->data, clidp->len);
3304 *channel_users_modes =
3305 silc_buffer_realloc(*channel_users_modes,
3306 (*channel_users_modes ?
3307 (*channel_users_modes)->truelen + len : len));
3308 silc_buffer_pull_tail(*channel_users_modes,
3309 ((*channel_users_modes)->end -
3310 (*channel_users_modes)->data));
3312 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3313 silc_buffer_pull(*channel_users_modes, len);
3314 silc_buffer_free(tmp);
3316 silc_buffer_free(clidp);
3318 silc_buffer_free(chidp);
3321 /* Returns assembled packets for all channels and users on those channels
3322 from the given ID List. The packets are in the form dictated by the
3323 New Channel and New Channel User payloads. */
3325 void silc_server_announce_get_channels(SilcServer server,
3327 SilcBuffer *channels,
3328 SilcBuffer *channel_users,
3329 SilcBuffer **channel_users_modes,
3330 uint32 *channel_users_modes_c,
3331 SilcChannelID ***channel_ids,
3332 unsigned long creation_time)
3334 SilcIDCacheList list;
3335 SilcIDCacheEntry id_cache;
3336 SilcChannelEntry channel;
3341 int i = *channel_users_modes_c;
3344 SILC_LOG_DEBUG(("Start"));
3346 /* Go through all channels in the list */
3347 if (silc_idcache_get_all(id_list->channels, &list)) {
3348 if (silc_idcache_list_first(list, &id_cache)) {
3350 channel = (SilcChannelEntry)id_cache->context;
3352 if (creation_time && channel->created < creation_time)
3357 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3358 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3359 name_len = strlen(channel->channel_name);
3362 len = 4 + name_len + id_len + 4;
3364 silc_buffer_realloc(*channels,
3365 (*channels ? (*channels)->truelen +
3367 silc_buffer_pull_tail(*channels,
3368 ((*channels)->end - (*channels)->data));
3369 silc_buffer_format(*channels,
3370 SILC_STR_UI_SHORT(name_len),
3371 SILC_STR_UI_XNSTRING(channel->channel_name,
3373 SILC_STR_UI_SHORT(id_len),
3374 SILC_STR_UI_XNSTRING(cid, id_len),
3375 SILC_STR_UI_INT(channel->mode),
3377 silc_buffer_pull(*channels, len);
3380 *channel_users_modes = silc_realloc(*channel_users_modes,
3381 sizeof(**channel_users_modes) *
3383 (*channel_users_modes)[i] = NULL;
3384 *channel_ids = silc_realloc(*channel_ids,
3385 sizeof(**channel_ids) * (i + 1));
3386 (*channel_ids)[i] = NULL;
3387 silc_server_announce_get_channel_users(server, channel,
3389 &(*channel_users_modes)[i]);
3390 (*channel_ids)[i] = channel->id;
3393 if (!silc_idcache_list_next(list, &id_cache))
3397 *channel_users_modes_c += i;
3400 silc_idcache_list_free(list);
3404 /* This function is used to announce our existing channels to our router
3405 when we've connected to it. This also announces the users on the
3406 channels to the router. If the `creation_time' is non-zero only the
3407 channels that was created after the `creation_time' are announced.
3408 Note that the channel users are still announced even if the `creation_time'
3411 void silc_server_announce_channels(SilcServer server,
3412 unsigned long creation_time,
3413 SilcSocketConnection remote)
3415 SilcBuffer channels = NULL, channel_users = NULL;
3416 SilcBuffer *channel_users_modes = NULL;
3417 uint32 channel_users_modes_c = 0;
3418 SilcChannelID **channel_ids = NULL;
3420 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3422 /* Get channels and channel users in local list */
3423 silc_server_announce_get_channels(server, server->local_list,
3424 &channels, &channel_users,
3425 &channel_users_modes,
3426 &channel_users_modes_c,
3427 &channel_ids, creation_time);
3429 /* Get channels and channel users in global list */
3430 if (server->server_type != SILC_SERVER)
3431 silc_server_announce_get_channels(server, server->global_list,
3432 &channels, &channel_users,
3433 &channel_users_modes,
3434 &channel_users_modes_c,
3435 &channel_ids, creation_time);
3438 silc_buffer_push(channels, channels->data - channels->head);
3439 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3441 /* Send the packet */
3442 silc_server_packet_send(server, remote,
3443 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3444 channels->data, channels->len,
3447 silc_buffer_free(channels);
3450 if (channel_users) {
3451 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3452 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3453 channel_users->len);
3455 /* Send the packet */
3456 silc_server_packet_send(server, remote,
3457 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3458 channel_users->data, channel_users->len,
3461 silc_buffer_free(channel_users);
3464 if (channel_users_modes) {
3467 for (i = 0; i < channel_users_modes_c; i++) {
3468 silc_buffer_push(channel_users_modes[i],
3469 channel_users_modes[i]->data -
3470 channel_users_modes[i]->head);
3471 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3472 channel_users_modes[i]->len);
3473 silc_server_packet_send_dest(server, remote,
3474 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3475 channel_ids[i], SILC_ID_CHANNEL,
3476 channel_users_modes[i]->data,
3477 channel_users_modes[i]->len,
3479 silc_buffer_free(channel_users_modes[i]);
3481 silc_free(channel_users_modes);
3482 silc_free(channel_ids);
3486 /* Failure timeout callback. If this is called then we will immediately
3487 process the received failure. We always process the failure with timeout
3488 since we do not want to blindly trust to received failure packets.
3489 This won't be called (the timeout is cancelled) if the failure was
3490 bogus (it is bogus if remote does not close the connection after sending
3493 SILC_TASK_CALLBACK(silc_server_failure_callback)
3495 SilcServerFailureContext f = (SilcServerFailureContext)context;
3497 if (f->sock->protocol) {
3498 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3499 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3505 /* Assembles user list and users mode list from the `channel'. */
3507 void silc_server_get_users_on_channel(SilcServer server,
3508 SilcChannelEntry channel,
3509 SilcBuffer *user_list,
3510 SilcBuffer *mode_list,
3513 SilcChannelClientEntry chl;
3514 SilcHashTableList htl;
3515 SilcBuffer client_id_list;
3516 SilcBuffer client_mode_list;
3518 uint32 list_count = 0, len = 0;
3520 silc_hash_table_list(channel->user_list, &htl);
3521 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3522 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3524 client_id_list = silc_buffer_alloc(len);
3526 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3527 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3528 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3530 silc_hash_table_list(channel->user_list, &htl);
3531 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3533 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3534 silc_buffer_put(client_id_list, idp->data, idp->len);
3535 silc_buffer_pull(client_id_list, idp->len);
3536 silc_buffer_free(idp);
3538 /* Client's mode on channel */
3539 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3540 silc_buffer_pull(client_mode_list, 4);
3544 silc_buffer_push(client_id_list,
3545 client_id_list->data - client_id_list->head);
3546 silc_buffer_push(client_mode_list,
3547 client_mode_list->data - client_mode_list->head);
3549 *user_list = client_id_list;
3550 *mode_list = client_mode_list;
3551 *user_count = list_count;
3554 /* Saves users and their modes to the `channel'. */
3556 void silc_server_save_users_on_channel(SilcServer server,
3557 SilcSocketConnection sock,
3558 SilcChannelEntry channel,
3559 SilcClientID *noadd,
3560 SilcBuffer user_list,
3561 SilcBuffer mode_list,
3566 for (i = 0; i < user_count; i++) {
3569 SilcClientID *client_id;
3570 SilcClientEntry client;
3573 SILC_GET16_MSB(idp_len, user_list->data + 2);
3575 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3576 silc_buffer_pull(user_list, idp_len);
3581 SILC_GET32_MSB(mode, mode_list->data);
3582 silc_buffer_pull(mode_list, 4);
3584 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3585 silc_free(client_id);
3589 /* Check if we have this client cached already. */
3590 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3591 server->server_type, NULL);
3593 client = silc_idlist_find_client_by_id(server->global_list,
3594 client_id, server->server_type,
3597 /* If router did not find such Client ID in its lists then this must
3598 be bogus client or some router in the net is buggy. */
3599 if (server->server_type == SILC_ROUTER) {
3600 silc_free(client_id);
3604 /* We don't have that client anywhere, add it. The client is added
3605 to global list since server didn't have it in the lists so it must be
3607 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3608 silc_id_dup(client_id, SILC_ID_CLIENT),
3609 sock->user_data, NULL);
3611 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3612 silc_free(client_id);
3616 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3619 silc_free(client_id);
3621 if (!silc_server_client_on_channel(client, channel)) {
3622 /* Client was not on the channel, add it. */
3623 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3624 chl->client = client;
3626 chl->channel = channel;
3627 silc_hash_table_add(channel->user_list, chl->client, chl);
3628 silc_hash_table_add(client->channels, chl->channel, chl);
3633 /* Lookups route to the client indicated by the `id_data'. The connection
3634 object and internal data object is returned. Returns NULL if route
3635 could not be found to the client. If the `client_id' is specified then
3636 it is used and the `id_data' is ignored. */
3638 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3639 unsigned char *id_data,
3641 SilcClientID *client_id,
3642 SilcIDListData *idata)
3645 SilcClientEntry client;
3647 SILC_LOG_DEBUG(("Start"));
3649 /* Decode destination Client ID */
3651 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3653 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3657 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3660 /* If the destination belongs to our server we don't have to route
3661 the packet anywhere but to send it to the local destination. */
3662 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3666 /* If we are router and the client has router then the client is in
3667 our cell but not directly connected to us. */
3668 if (server->server_type == SILC_ROUTER && client->router) {
3669 /* We are of course in this case the client's router thus the route
3670 to the client is the server who owns the client. So, we will send
3671 the packet to that server. */
3673 *idata = (SilcIDListData)client->router;
3674 return client->router->connection;
3677 /* Seems that client really is directly connected to us */
3679 *idata = (SilcIDListData)client;
3680 return client->connection;
3683 /* Destination belongs to someone not in this server. If we are normal
3684 server our action is to send the packet to our router. */
3685 if (server->server_type != SILC_ROUTER && !server->standalone) {
3688 *idata = (SilcIDListData)server->router;
3689 return server->router->connection;
3692 /* We are router and we will perform route lookup for the destination
3693 and send the packet to fastest route. */
3694 if (server->server_type == SILC_ROUTER && !server->standalone) {
3695 /* Check first that the ID is valid */
3696 client = silc_idlist_find_client_by_id(server->global_list, id,
3699 SilcSocketConnection dst_sock;
3701 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3705 *idata = (SilcIDListData)dst_sock->user_data;
3714 /* Encodes and returns channel list of channels the `client' has joined.
3715 Secret channels are not put to the list. */
3717 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3718 SilcClientEntry client)
3720 SilcBuffer buffer = NULL;
3721 SilcChannelEntry channel;
3722 SilcChannelClientEntry chl;
3723 SilcHashTableList htl;
3729 silc_hash_table_list(client->channels, &htl);
3730 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3731 channel = chl->channel;
3733 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3734 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3737 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3738 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3739 name_len = strlen(channel->channel_name);
3741 len = 4 + name_len + id_len + 4;
3742 buffer = silc_buffer_realloc(buffer,
3743 (buffer ? (buffer)->truelen + len : len));
3744 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3745 silc_buffer_format(buffer,
3746 SILC_STR_UI_SHORT(name_len),
3747 SILC_STR_UI_XNSTRING(channel->channel_name,
3749 SILC_STR_UI_SHORT(id_len),
3750 SILC_STR_UI_XNSTRING(cid, id_len),
3751 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3753 silc_buffer_pull(buffer, len);
3758 silc_buffer_push(buffer, buffer->data - buffer->head);
3763 /* Finds client entry by Client ID and if it is not found then resolves
3764 it using WHOIS command. */
3766 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3767 SilcClientID *client_id)
3769 SilcClientEntry client;
3771 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3774 client = silc_idlist_find_client_by_id(server->global_list,
3775 client_id, TRUE, NULL);
3776 if (!client && server->server_type == SILC_ROUTER)
3780 if (!client && server->standalone)
3783 if (!client || !client->nickname || !client->username) {
3784 SilcBuffer buffer, idp;
3786 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3787 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3788 client->resolve_cmd_ident = ++server->cmd_ident;
3790 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3791 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3792 server->cmd_ident, 1,
3793 3, idp->data, idp->len);
3794 silc_server_packet_send(server, client ? client->router->connection :
3795 server->router->connection,
3796 SILC_PACKET_COMMAND, 0,
3797 buffer->data, buffer->len, FALSE);
3798 silc_buffer_free(idp);
3799 silc_buffer_free(buffer);
3806 /* A timeout callback for the re-key. We will be the initiator of the
3809 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3811 SilcSocketConnection sock = (SilcSocketConnection)context;
3812 SilcIDListData idata = (SilcIDListData)sock->user_data;
3813 SilcServer server = (SilcServer)idata->rekey->context;
3814 SilcProtocol protocol;
3815 SilcServerRekeyInternalContext *proto_ctx;
3817 SILC_LOG_DEBUG(("Start"));
3819 /* Allocate internal protocol context. This is sent as context
3821 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3822 proto_ctx->server = (void *)server;
3823 proto_ctx->sock = sock;
3824 proto_ctx->responder = FALSE;
3825 proto_ctx->pfs = idata->rekey->pfs;
3827 /* Perform rekey protocol. Will call the final callback after the
3828 protocol is over. */
3829 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3830 &protocol, proto_ctx, silc_server_rekey_final);
3831 sock->protocol = protocol;
3833 /* Run the protocol */
3834 silc_protocol_execute(protocol, server->schedule, 0, 0);
3836 /* Re-register re-key timeout */
3837 silc_schedule_task_add(server->schedule, sock->sock,
3838 silc_server_rekey_callback,
3839 context, idata->rekey->timeout, 0,
3840 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3843 /* The final callback for the REKEY protocol. This will actually take the
3844 new key material into use. */
3846 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3848 SilcProtocol protocol = (SilcProtocol)context;
3849 SilcServerRekeyInternalContext *ctx =
3850 (SilcServerRekeyInternalContext *)protocol->context;
3851 SilcServer server = (SilcServer)ctx->server;
3852 SilcSocketConnection sock = ctx->sock;
3854 SILC_LOG_DEBUG(("Start"));
3856 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3857 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3858 /* Error occured during protocol */
3859 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3860 silc_protocol_cancel(protocol, server->schedule);
3861 silc_protocol_free(protocol);
3862 sock->protocol = NULL;
3864 silc_packet_context_free(ctx->packet);
3866 silc_ske_free(ctx->ske);
3871 /* Purge the outgoing data queue to assure that all rekey packets really
3872 go to the network before we quit the protocol. */
3873 silc_server_packet_queue_purge(server, sock);
3876 silc_protocol_free(protocol);
3877 sock->protocol = NULL;
3879 silc_packet_context_free(ctx->packet);
3881 silc_ske_free(ctx->ske);