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);
187 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
188 sock[sock_count] = tmp;
190 listen = listen->next;
193 /* Initialize ID caches */
194 server->local_list->clients =
195 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
196 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
197 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
199 /* These are allocated for normal server as well as these hold some
200 global information that the server has fetched from its router. For
201 router these are used as they are supposed to be used on router. */
202 server->global_list->clients =
203 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
204 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
205 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
207 /* Allocate the entire socket list that is used in server. Eventually
208 all connections will have entry in this table (it is a table of
209 pointers to the actual object that is allocated individually
211 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
212 sizeof(*server->sockets));
214 for (i = 0; i < sock_count; i++) {
215 SilcSocketConnection newsocket = NULL;
217 /* Set socket to non-blocking mode */
218 silc_net_set_socket_nonblock(sock[i]);
219 server->sock = sock[i];
221 /* Create a Server ID for the server. */
222 silc_id_create_server_id(sock[i], server->rng, &id);
228 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
229 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
230 server->id_type = SILC_ID_SERVER;
231 server->server_name = server->config->server_info->server_name;
233 /* Add ourselves to the server list. We don't have a router yet
234 beacuse we haven't established a route yet. It will be done later.
235 For now, NULL is sent as router. This allocates new entry to
238 silc_idlist_add_server(server->local_list,
239 server->config->server_info->server_name,
240 server->server_type, server->id, NULL, NULL);
242 SILC_LOG_ERROR(("Could not add ourselves to cache"));
245 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
247 /* Add ourselves also to the socket table. The entry allocated above
248 is sent as argument for fast referencing in the future. */
249 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
252 server->sockets[sock[i]] = newsocket;
254 /* Perform name and address lookups to resolve the listenning address
256 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
258 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
260 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
261 newsocket->hostname ? newsocket->hostname :
262 newsocket->ip ? newsocket->ip : ""));
263 server->stat.conn_failures++;
266 if (!newsocket->hostname)
267 newsocket->hostname = strdup(newsocket->ip);
269 newsocket->port = silc_net_get_local_port(sock[i]);
271 /* Put the allocated socket pointer also to the entry allocated above
272 for fast back-referencing to the socket list. */
273 id_entry->connection = (void *)server->sockets[sock[i]];
274 server->id_entry = id_entry;
277 /* Register protocols */
278 silc_server_protocols_register();
280 /* Initialize the scheduler. */
281 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
282 if (!server->schedule)
285 /* Add the first task to the scheduler. This is task that is executed by
286 timeout. It expires as soon as the caller calls silc_server_run. This
287 task performs authentication protocol and key exchange with our
289 silc_schedule_task_add(server->schedule, sock[0],
290 silc_server_connect_to_router,
291 (void *)server, 0, 1,
293 SILC_TASK_PRI_NORMAL);
295 /* Add listener task to the scheduler. This task receives new connections
296 to the server. This task remains on the queue until the end of the
298 silc_schedule_task_add(server->schedule, sock[0],
299 silc_server_accept_new_connection,
300 (void *)server, 0, 0,
302 SILC_TASK_PRI_NORMAL);
303 server->listenning = TRUE;
305 /* If server connections has been configured then we must be router as
306 normal server cannot have server connections, only router connections. */
307 if (server->config->servers) {
308 SilcServerConfigSectionServerConnection *ptr = server->config->servers;
310 server->server_type = SILC_ROUTER;
312 if (ptr->backup_router) {
313 server->server_type = SILC_BACKUP_ROUTER;
314 server->backup_router = TRUE;
321 /* Register the ID Cache purge task. This periodically purges the ID cache
322 and removes the expired cache entries. */
324 /* Clients local list */
325 purge = silc_calloc(1, sizeof(*purge));
326 purge->cache = server->local_list->clients;
327 purge->schedule = server->schedule;
328 silc_schedule_task_add(purge->schedule, 0,
330 (void *)purge, 600, 0,
331 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
333 /* Clients global list */
334 purge = silc_calloc(1, sizeof(*purge));
335 purge->cache = server->global_list->clients;
336 purge->schedule = server->schedule;
337 silc_schedule_task_add(purge->schedule, 0,
339 (void *)purge, 300, 0,
340 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
342 SILC_LOG_DEBUG(("Server initialized"));
344 /* We are done here, return succesfully */
348 for (i = 0; i < sock_count; i++)
349 silc_net_close_server(sock[i]);
354 /* Fork server to background and set gid+uid to non-root.
355 Silcd will not run as root, so trying to set either user or group to
356 root will cause silcd to exit. */
358 void silc_server_daemonise(SilcServer server)
360 /* Are we executing silcd as root or a regular user? */
367 if (!server->config->identity || !server->config->identity->user ||
368 !server->config->identity->group) {
369 fprintf(stderr, "Error:"
370 "\tSILC server must not be run as root. For the security of your\n"
371 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
372 "\tuser account. Modify the [Identity] configuration section to run\n"
373 "\tthe server as non-root user.\n");
377 /* Get the values given for user and group in configuration file */
378 user=server->config->identity->user;
379 group=server->config->identity->group;
381 /* Check whether the user/group information is text */
382 if (atoi(user)!=0 || atoi(group)!=0) {
383 SILC_LOG_DEBUG(("Invalid user and/or group information"));
384 SILC_LOG_DEBUG(("User and/or group given as number"));
385 fprintf(stderr, "Invalid user and/or group information\n");
386 fprintf(stderr, "Please assign them as names, not numbers\n");
390 /* Catch the nasty incident of string "0" returning 0 from atoi */
391 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
392 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
393 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
401 fprintf(stderr, "No such user %s found\n", user);
406 fprintf(stderr, "No such group %s found\n", group);
410 /* Check whether user and/or group is set to root. If yes, exit
411 immediately. Otherwise, setgid and setuid server to user.group */
412 if (gr->gr_gid==0 || pw->pw_uid==0) {
413 fprintf(stderr, "Error:"
414 "\tSILC server must not be run as root. For the security of your\n"
415 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
416 "\tuser account. Modify the [Identity] configuration section to run\n"
417 "\tthe server as non-root user.\n");
420 /* Fork server to background, making it a daemon */
422 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
423 SILC_LOG_DEBUG(("Forking SILC server to background"));
428 SILC_LOG_DEBUG(("Changing to group %s", group));
429 if(setgid(gr->gr_gid)==0) {
430 SILC_LOG_DEBUG(("Setgid to %s", group));
432 SILC_LOG_DEBUG(("Setgid to %s failed", group));
433 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
437 SILC_LOG_DEBUG(("Changing to user nobody"));
438 if(setuid(pw->pw_uid)==0) {
439 SILC_LOG_DEBUG(("Setuid to %s", user));
441 SILC_LOG_DEBUG(("Setuid to %s failed", user));
442 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
448 /* Fork server to background, making it a daemon */
450 SILC_LOG_DEBUG(("Server started as user"));
451 SILC_LOG_DEBUG(("Forking SILC server to background"));
458 /* The heart of the server. This runs the scheduler thus runs the server.
459 When this returns the server has been stopped and the program will
462 void silc_server_run(SilcServer server)
464 SILC_LOG_DEBUG(("Running server"));
466 SILC_LOG_INFO(("SILC Server started"));
468 /* Start the scheduler, the heart of the SILC server. When this returns
469 the program will be terminated. */
470 silc_schedule(server->schedule);
473 /* Stops the SILC server. This function is used to shutdown the server.
474 This is usually called after the scheduler has returned. After stopping
475 the server one should call silc_server_free. */
477 void silc_server_stop(SilcServer server)
479 SILC_LOG_DEBUG(("Stopping server"));
481 silc_schedule_stop(server->schedule);
482 silc_schedule_uninit(server->schedule);
484 silc_server_protocols_unregister();
486 SILC_LOG_DEBUG(("Server stopped"));
489 /* Function that is called when the network connection to a router has
490 been established. This will continue with the key exchange protocol
491 with the remote router. */
493 void silc_server_start_key_exchange(SilcServer server,
494 SilcServerConnection sconn,
497 SilcSocketConnection newsocket;
498 SilcProtocol protocol;
499 SilcServerKEInternalContext *proto_ctx;
502 /* Set socket options */
503 silc_net_set_socket_nonblock(sock);
504 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
506 /* Create socket connection for the connection. Even though we
507 know that we are connecting to a router we will mark the socket
508 to be unknown connection until we have executed authentication
510 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
511 server->sockets[sock] = newsocket;
512 newsocket->hostname = strdup(sconn->remote_host);
513 newsocket->ip = strdup(sconn->remote_host);
514 newsocket->port = sconn->remote_port;
515 sconn->sock = newsocket;
517 /* Allocate internal protocol context. This is sent as context
519 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
520 proto_ctx->server = (void *)server;
521 proto_ctx->context = (void *)sconn;
522 proto_ctx->sock = newsocket;
523 proto_ctx->rng = server->rng;
524 proto_ctx->responder = FALSE;
526 /* Perform key exchange protocol. silc_server_connect_to_router_second
527 will be called after the protocol is finished. */
528 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
529 &protocol, proto_ctx,
530 silc_server_connect_to_router_second);
531 newsocket->protocol = protocol;
533 /* Register a timeout task that will be executed if the protocol
534 is not executed within set limit. */
535 proto_ctx->timeout_task =
536 silc_schedule_task_add(server->schedule, sock,
537 silc_server_timeout_remote,
538 server, server->params->protocol_timeout,
539 server->params->protocol_timeout_usec,
543 /* Register the connection for network input and output. This sets
544 that scheduler will listen for incoming packets for this connection
545 and sets that outgoing packets may be sent to this connection as
546 well. However, this doesn't set the scheduler for outgoing traffic,
547 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
548 later when outgoing data is available. */
549 context = (void *)server;
550 SILC_REGISTER_CONNECTION_FOR_IO(sock);
552 /* Run the protocol */
553 silc_protocol_execute(protocol, server->schedule, 0, 0);
556 /* Timeout callback that will be called to retry connecting to remote
557 router. This is used by both normal and router server. This will wait
558 before retrying the connecting. The timeout is generated by exponential
559 backoff algorithm. */
561 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
563 SilcServerConnection sconn = (SilcServerConnection)context;
564 SilcServer server = sconn->server;
566 SILC_LOG_INFO(("Retrying connecting to a router"));
568 /* Calculate next timeout */
569 if (sconn->retry_count >= 1) {
570 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
571 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
572 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
574 sconn->retry_timeout = server->params->retry_interval_min;
576 sconn->retry_count++;
577 sconn->retry_timeout = sconn->retry_timeout +
578 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
580 /* If we've reached max retry count, give up. */
581 if (sconn->retry_count > server->params->retry_count &&
582 server->params->retry_keep_trying == FALSE) {
583 SILC_LOG_ERROR(("Could not connect to router, giving up"));
587 /* Wait one before retrying */
588 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
589 context, sconn->retry_timeout,
590 server->params->retry_interval_min_usec,
591 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
594 /* Generic routine to use connect to a router. */
596 SILC_TASK_CALLBACK(silc_server_connect_router)
598 SilcServerConnection sconn = (SilcServerConnection)context;
599 SilcServer server = sconn->server;
602 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
603 (sconn->backup ? "backup router" : "router"),
604 sconn->remote_host, sconn->remote_port));
606 server->router_connect = time(0);
608 /* Connect to remote host */
609 sock = silc_net_create_connection(server->config->listen_port->local_ip,
613 SILC_LOG_ERROR(("Could not connect to router"));
614 silc_schedule_task_add(server->schedule, fd,
615 silc_server_connect_to_router_retry,
616 context, 0, 1, SILC_TASK_TIMEOUT,
617 SILC_TASK_PRI_NORMAL);
621 /* Continue with key exchange protocol */
622 silc_server_start_key_exchange(server, sconn, sock);
625 /* This function connects to our primary router or if we are a router this
626 establishes all our primary routes. This is called at the start of the
627 server to do authentication and key exchange with our router - called
630 SILC_TASK_CALLBACK(silc_server_connect_to_router)
632 SilcServer server = (SilcServer)context;
633 SilcServerConnection sconn;
634 SilcServerConfigSectionServerConnection *ptr;
636 SILC_LOG_DEBUG(("Connecting to router(s)"));
638 if (server->server_type == SILC_SERVER) {
639 SILC_LOG_DEBUG(("We are normal server"));
640 } else if (server->server_type == SILC_ROUTER) {
641 SILC_LOG_DEBUG(("We are router"));
643 SILC_LOG_DEBUG(("We are backup router/normal server"));
646 /* Create the connections to all our routes */
647 ptr = server->config->routers;
650 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
651 ptr->backup_router ? "Backup router" : "Router",
652 ptr->initiator ? "Initiator" : "Responder",
653 ptr->host, ptr->port));
655 if (ptr->initiator) {
656 /* Allocate connection object for hold connection specific stuff. */
657 sconn = silc_calloc(1, sizeof(*sconn));
658 sconn->server = server;
659 sconn->remote_host = strdup(ptr->host);
660 sconn->remote_port = ptr->port;
661 sconn->backup = ptr->backup_router;
663 silc_schedule_task_add(server->schedule, fd,
664 silc_server_connect_router,
665 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
666 SILC_TASK_PRI_NORMAL);
675 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
677 /* There wasn't a configured router, we will continue but we don't
678 have a connection to outside world. We will be standalone server. */
679 server->standalone = TRUE;
682 /* Second part of connecting to router(s). Key exchange protocol has been
683 executed and now we will execute authentication protocol. */
685 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
687 SilcProtocol protocol = (SilcProtocol)context;
688 SilcServerKEInternalContext *ctx =
689 (SilcServerKEInternalContext *)protocol->context;
690 SilcServer server = (SilcServer)ctx->server;
691 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
692 SilcSocketConnection sock = ctx->sock;
693 SilcServerConnAuthInternalContext *proto_ctx;
694 SilcServerConfigSectionServerConnection *conn = NULL;
696 SILC_LOG_DEBUG(("Start"));
698 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
699 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
700 /* Error occured during protocol */
701 silc_protocol_free(protocol);
702 sock->protocol = NULL;
703 silc_ske_free_key_material(ctx->keymat);
705 silc_packet_context_free(ctx->packet);
707 silc_ske_free(ctx->ske);
708 silc_free(ctx->dest_id);
710 silc_schedule_task_del_by_callback(server->schedule,
711 silc_server_failure_callback);
712 silc_server_disconnect_remote(server, sock, "Server closed connection: "
713 "Key exchange failed");
717 /* We now have the key material as the result of the key exchange
718 protocol. Take the key material into use. Free the raw key material
719 as soon as we've set them into use. */
720 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
721 ctx->ske->prop->cipher,
722 ctx->ske->prop->pkcs,
723 ctx->ske->prop->hash,
724 ctx->ske->prop->hmac,
725 ctx->ske->prop->group,
727 silc_protocol_free(protocol);
728 sock->protocol = NULL;
729 silc_ske_free_key_material(ctx->keymat);
731 silc_packet_context_free(ctx->packet);
733 silc_ske_free(ctx->ske);
734 silc_free(ctx->dest_id);
736 silc_schedule_task_del_by_callback(server->schedule,
737 silc_server_failure_callback);
738 silc_server_disconnect_remote(server, sock, "Server closed connection: "
739 "Key exchange failed");
742 silc_ske_free_key_material(ctx->keymat);
744 /* Allocate internal context for the authentication protocol. This
745 is sent as context for the protocol. */
746 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
747 proto_ctx->server = (void *)server;
748 proto_ctx->context = (void *)sconn;
749 proto_ctx->sock = sock;
750 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
751 proto_ctx->dest_id_type = ctx->dest_id_type;
752 proto_ctx->dest_id = ctx->dest_id;
754 /* Resolve the authentication method used in this connection. Check if
755 we find a match from user configured connections */
756 conn = silc_server_config_find_router_conn(server->config,
760 /* Match found. Use the configured authentication method */
761 proto_ctx->auth_meth = conn->auth_meth;
762 if (conn->auth_data) {
763 proto_ctx->auth_data = strdup(conn->auth_data);
764 proto_ctx->auth_data_len = strlen(conn->auth_data);
767 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
768 sock->hostname, sock->ip, sock->port));
769 silc_protocol_free(protocol);
770 sock->protocol = NULL;
772 silc_packet_context_free(ctx->packet);
774 silc_ske_free(ctx->ske);
775 silc_free(ctx->dest_id);
777 silc_schedule_task_del_by_callback(server->schedule,
778 silc_server_failure_callback);
779 silc_server_disconnect_remote(server, sock, "Server closed connection: "
780 "Key exchange failed");
784 /* Free old protocol as it is finished now */
785 silc_protocol_free(protocol);
787 silc_packet_context_free(ctx->packet);
789 sock->protocol = NULL;
791 /* Allocate the authentication protocol. This is allocated here
792 but we won't start it yet. We will be receiving party of this
793 protocol thus we will wait that connecting party will make
795 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
796 &sock->protocol, proto_ctx,
797 silc_server_connect_to_router_final);
799 /* Register timeout task. If the protocol is not executed inside
800 this timelimit the connection will be terminated. Currently
801 this is 15 seconds and is hard coded limit (XXX). */
802 proto_ctx->timeout_task =
803 silc_schedule_task_add(server->schedule, sock->sock,
804 silc_server_timeout_remote,
805 (void *)server, 15, 0,
809 /* Run the protocol */
810 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
813 /* Finalizes the connection to router. Registers a server task to the
814 queue so that we can accept new connections. */
816 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
818 SilcProtocol protocol = (SilcProtocol)context;
819 SilcServerConnAuthInternalContext *ctx =
820 (SilcServerConnAuthInternalContext *)protocol->context;
821 SilcServer server = (SilcServer)ctx->server;
822 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
823 SilcSocketConnection sock = ctx->sock;
824 SilcServerEntry id_entry;
826 SilcServerHBContext hb_context;
827 unsigned char *id_string;
829 SilcIDListData idata;
831 SILC_LOG_DEBUG(("Start"));
833 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
834 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
835 /* Error occured during protocol */
836 silc_free(ctx->dest_id);
837 silc_server_disconnect_remote(server, sock, "Server closed connection: "
838 "Authentication failed");
842 /* Add a task to the queue. This task receives new connections to the
843 server. This task remains on the queue until the end of the program. */
844 if (!server->listenning && !sconn->backup) {
845 silc_schedule_task_add(server->schedule, server->sock,
846 silc_server_accept_new_connection,
847 (void *)server, 0, 0,
849 SILC_TASK_PRI_NORMAL);
850 server->listenning = TRUE;
853 /* Send NEW_SERVER packet to the router. We will become registered
854 to the SILC network after sending this packet. */
855 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
856 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
857 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
858 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
859 silc_buffer_format(packet,
860 SILC_STR_UI_SHORT(id_len),
861 SILC_STR_UI_XNSTRING(id_string, id_len),
862 SILC_STR_UI_SHORT(strlen(server->server_name)),
863 SILC_STR_UI_XNSTRING(server->server_name,
864 strlen(server->server_name)),
867 /* Send the packet */
868 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
869 packet->data, packet->len, TRUE);
870 silc_buffer_free(packet);
871 silc_free(id_string);
873 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
875 /* Add the connected router to local server list */
876 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
877 SILC_ROUTER, ctx->dest_id, NULL, sock);
879 silc_free(ctx->dest_id);
880 silc_server_disconnect_remote(server, sock, "Server closed connection: "
881 "Authentication failed");
885 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
886 silc_free(sock->user_data);
887 sock->user_data = (void *)id_entry;
888 sock->type = SILC_SOCKET_TYPE_ROUTER;
889 idata = (SilcIDListData)sock->user_data;
890 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
892 /* Perform keepalive. The `hb_context' will be freed automatically
893 when finally calling the silc_socket_free function. XXX hardcoded
895 hb_context = silc_calloc(1, sizeof(*hb_context));
896 hb_context->server = server;
897 silc_socket_set_heartbeat(sock, 600, hb_context,
898 silc_server_perform_heartbeat,
901 /* Register re-key timeout */
902 idata->rekey->timeout = 3600; /* XXX hardcoded */
903 idata->rekey->context = (void *)server;
904 silc_schedule_task_add(server->schedule, sock->sock,
905 silc_server_rekey_callback,
906 (void *)sock, idata->rekey->timeout, 0,
907 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
909 if (!sconn->backup) {
910 /* Mark this router our primary router if we're still standalone */
911 if (server->standalone) {
912 server->id_entry->router = id_entry;
913 server->router = id_entry;
914 server->standalone = FALSE;
916 /* If we are router then announce our possible servers. */
917 if (server->server_type == SILC_ROUTER)
918 silc_server_announce_servers(server, FALSE, 0,
919 server->router->connection);
921 /* Announce our clients and channels to the router */
922 silc_server_announce_clients(server, 0, server->router->connection);
923 silc_server_announce_channels(server, 0, server->router->connection);
926 /* Add this server to be our backup router */
927 silc_server_backup_add(server, id_entry, FALSE);
930 sock->protocol = NULL;
932 /* Call the completion callback to indicate that we've connected to
935 (*sconn->callback)(server, id_entry, sconn->callback_context);
938 /* Free the temporary connection data context */
940 silc_free(sconn->remote_host);
944 /* Free the protocol object */
945 if (sock->protocol == protocol)
946 sock->protocol = NULL;
947 silc_protocol_free(protocol);
949 silc_packet_context_free(ctx->packet);
951 silc_ske_free(ctx->ske);
955 /* Host lookup callbcak that is called after the incoming connection's
956 IP and FQDN lookup is performed. This will actually check the acceptance
957 of the incoming connection and will register the key exchange protocol
958 for this connection. */
961 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
964 SilcServer server = (SilcServer)context;
965 SilcServerKEInternalContext *proto_ctx;
966 void *cconfig, *sconfig, *rconfig;
967 SilcServerConfigSectionDenyConnection *deny;
970 SILC_LOG_DEBUG(("Start"));
972 /* Check whether we could resolve both IP and FQDN. */
973 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
974 server->params->require_reverse_mapping)) {
975 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
976 sock->hostname ? sock->hostname :
977 sock->ip ? sock->ip : ""));
978 server->stat.conn_failures++;
979 silc_server_disconnect_remote(server, sock,
980 "Server closed connection: Unknown host");
984 /* Register the connection for network input and output. This sets
985 that scheduler will listen for incoming packets for this connection
986 and sets that outgoing packets may be sent to this connection as well.
987 However, this doesn't set the scheduler for outgoing traffic, it
988 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
989 later when outgoing data is available. */
990 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
992 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
995 port = server->sockets[server->sock]->port; /* Listenning port */
997 /* Check whether this connection is denied to connect to us. */
998 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1000 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1003 /* The connection is denied */
1004 SILC_LOG_INFO(("Connection %s (%s) is denied",
1005 sock->hostname, sock->ip));
1006 silc_server_disconnect_remote(server, sock, deny->comment ?
1008 "Server closed connection: "
1009 "Connection refused");
1010 server->stat.conn_failures++;
1014 /* Check whether we have configred this sort of connection at all. We
1015 have to check all configurations since we don't know what type of
1016 connection this is. */
1017 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1019 cconfig = silc_server_config_find_client_conn(server->config,
1022 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1025 sconfig = silc_server_config_find_server_conn(server->config,
1028 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1030 rconfig = silc_server_config_find_router_conn(server->config,
1033 if (!cconfig && !sconfig && !rconfig) {
1034 silc_server_disconnect_remote(server, sock,
1035 "Server closed connection: "
1036 "Connection refused");
1037 server->stat.conn_failures++;
1041 /* The connection is allowed */
1043 /* Allocate internal context for key exchange protocol. This is
1044 sent as context for the protocol. */
1045 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1046 proto_ctx->server = context;
1047 proto_ctx->sock = sock;
1048 proto_ctx->rng = server->rng;
1049 proto_ctx->responder = TRUE;
1050 proto_ctx->cconfig = cconfig;
1051 proto_ctx->sconfig = sconfig;
1052 proto_ctx->rconfig = rconfig;
1054 /* Prepare the connection for key exchange protocol. We allocate the
1055 protocol but will not start it yet. The connector will be the
1056 initiator of the protocol thus we will wait for initiation from
1057 there before we start the protocol. */
1058 server->stat.auth_attempts++;
1059 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1060 &sock->protocol, proto_ctx,
1061 silc_server_accept_new_connection_second);
1063 /* Register a timeout task that will be executed if the connector
1064 will not start the key exchange protocol within 60 seconds. For
1065 now, this is a hard coded limit. After 60 secs the connection will
1066 be closed if the key exchange protocol has not been started. */
1067 proto_ctx->timeout_task =
1068 silc_schedule_task_add(server->schedule, sock->sock,
1069 silc_server_timeout_remote,
1075 /* Accepts new connections to the server. Accepting new connections are
1076 done in three parts to make it async. */
1078 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1080 SilcServer server = (SilcServer)context;
1081 SilcSocketConnection newsocket;
1084 SILC_LOG_DEBUG(("Accepting new connection"));
1086 server->stat.conn_attempts++;
1088 sock = silc_net_accept_connection(server->sock);
1090 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1091 server->stat.conn_failures++;
1095 /* Check max connections */
1096 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1097 SILC_LOG_ERROR(("Refusing connection, server is full"));
1098 server->stat.conn_failures++;
1102 /* Set socket options */
1103 silc_net_set_socket_nonblock(sock);
1104 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1106 /* We don't create a ID yet, since we don't know what type of connection
1107 this is yet. But, we do add the connection to the socket table. */
1108 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1109 server->sockets[sock] = newsocket;
1111 /* Perform asynchronous host lookup. This will lookup the IP and the
1112 FQDN of the remote connection. After the lookup is done the connection
1113 is accepted further. */
1114 silc_socket_host_lookup(newsocket, TRUE,
1115 silc_server_accept_new_connection_lookup, context,
1119 /* Second part of accepting new connection. Key exchange protocol has been
1120 performed and now it is time to do little connection authentication
1121 protocol to figure out whether this connection is client or server
1122 and whether it has right to access this server (especially server
1123 connections needs to be authenticated). */
1125 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1127 SilcProtocol protocol = (SilcProtocol)context;
1128 SilcServerKEInternalContext *ctx =
1129 (SilcServerKEInternalContext *)protocol->context;
1130 SilcServer server = (SilcServer)ctx->server;
1131 SilcSocketConnection sock = ctx->sock;
1132 SilcServerConnAuthInternalContext *proto_ctx;
1134 SILC_LOG_DEBUG(("Start"));
1136 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1137 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1138 /* Error occured during protocol */
1139 silc_protocol_free(protocol);
1140 sock->protocol = NULL;
1141 silc_ske_free_key_material(ctx->keymat);
1143 silc_packet_context_free(ctx->packet);
1145 silc_ske_free(ctx->ske);
1146 silc_free(ctx->dest_id);
1148 silc_schedule_task_del_by_callback(server->schedule,
1149 silc_server_failure_callback);
1150 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1151 "Key exchange failed");
1152 server->stat.auth_failures++;
1156 /* We now have the key material as the result of the key exchange
1157 protocol. Take the key material into use. Free the raw key material
1158 as soon as we've set them into use. */
1159 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1160 ctx->ske->prop->cipher,
1161 ctx->ske->prop->pkcs,
1162 ctx->ske->prop->hash,
1163 ctx->ske->prop->hmac,
1164 ctx->ske->prop->group,
1166 silc_protocol_free(protocol);
1167 sock->protocol = NULL;
1168 silc_ske_free_key_material(ctx->keymat);
1170 silc_packet_context_free(ctx->packet);
1172 silc_ske_free(ctx->ske);
1173 silc_free(ctx->dest_id);
1175 silc_schedule_task_del_by_callback(server->schedule,
1176 silc_server_failure_callback);
1177 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1178 "Key exchange failed");
1179 server->stat.auth_failures++;
1182 silc_ske_free_key_material(ctx->keymat);
1184 /* Allocate internal context for the authentication protocol. This
1185 is sent as context for the protocol. */
1186 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1187 proto_ctx->server = (void *)server;
1188 proto_ctx->sock = sock;
1189 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1190 proto_ctx->responder = TRUE;
1191 proto_ctx->dest_id_type = ctx->dest_id_type;
1192 proto_ctx->dest_id = ctx->dest_id;
1193 proto_ctx->cconfig = ctx->cconfig;
1194 proto_ctx->sconfig = ctx->sconfig;
1195 proto_ctx->rconfig = ctx->rconfig;
1197 /* Free old protocol as it is finished now */
1198 silc_protocol_free(protocol);
1200 silc_packet_context_free(ctx->packet);
1202 sock->protocol = NULL;
1204 /* Allocate the authentication protocol. This is allocated here
1205 but we won't start it yet. We will be receiving party of this
1206 protocol thus we will wait that connecting party will make
1207 their first move. */
1208 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1209 &sock->protocol, proto_ctx,
1210 silc_server_accept_new_connection_final);
1212 /* Register timeout task. If the protocol is not executed inside
1213 this timelimit the connection will be terminated. Currently
1214 this is 60 seconds and is hard coded limit (XXX). */
1215 proto_ctx->timeout_task =
1216 silc_schedule_task_add(server->schedule, sock->sock,
1217 silc_server_timeout_remote,
1218 (void *)server, 60, 0,
1223 /* Final part of accepting new connection. The connection has now
1224 been authenticated and keys has been exchanged. We also know whether
1225 this is client or server connection. */
1227 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1229 SilcProtocol protocol = (SilcProtocol)context;
1230 SilcServerConnAuthInternalContext *ctx =
1231 (SilcServerConnAuthInternalContext *)protocol->context;
1232 SilcServer server = (SilcServer)ctx->server;
1233 SilcSocketConnection sock = ctx->sock;
1234 SilcServerHBContext hb_context;
1235 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1236 void *id_entry = NULL;
1238 SILC_LOG_DEBUG(("Start"));
1240 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1241 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1242 /* Error occured during protocol */
1243 silc_protocol_free(protocol);
1244 sock->protocol = NULL;
1246 silc_packet_context_free(ctx->packet);
1248 silc_ske_free(ctx->ske);
1249 silc_free(ctx->dest_id);
1252 sock->protocol = NULL;
1253 silc_schedule_task_del_by_callback(server->schedule,
1254 silc_server_failure_callback);
1255 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1256 "Authentication failed");
1257 server->stat.auth_failures++;
1261 entry->data.last_receive = time(NULL);
1263 switch (ctx->conn_type) {
1264 case SILC_SOCKET_TYPE_CLIENT:
1266 SilcClientEntry client;
1268 SILC_LOG_DEBUG(("Remote host is client"));
1269 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1272 /* Add the client to the client ID cache. The nickname and Client ID
1273 and other information is created after we have received NEW_CLIENT
1274 packet from client. */
1275 client = silc_idlist_add_client(server->local_list,
1276 NULL, NULL, NULL, NULL, NULL, sock);
1278 SILC_LOG_ERROR(("Could not add new client to cache"));
1279 silc_free(sock->user_data);
1280 silc_server_disconnect_remote(server, sock,
1281 "Server closed connection: "
1282 "Authentication failed");
1283 server->stat.auth_failures++;
1288 server->stat.my_clients++;
1289 server->stat.clients++;
1290 if (server->server_type == SILC_ROUTER)
1291 server->stat.cell_clients++;
1293 id_entry = (void *)client;
1296 case SILC_SOCKET_TYPE_SERVER:
1297 case SILC_SOCKET_TYPE_ROUTER:
1299 SilcServerEntry new_server;
1300 SilcServerConfigSectionServerConnection *conn =
1301 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1302 ctx->sconfig : ctx->rconfig;
1304 SILC_LOG_DEBUG(("Remote host is %s",
1305 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1306 "server" : (conn->backup_router ?
1307 "backup router" : "router")));
1308 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1309 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1310 "server" : (conn->backup_router ?
1311 "backup router" : "router")));
1313 /* Add the server into server cache. The server name and Server ID
1314 is updated after we have received NEW_SERVER packet from the
1315 server. We mark ourselves as router for this server if we really
1318 silc_idlist_add_server(server->local_list, NULL,
1319 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1320 SILC_SERVER : SILC_ROUTER, NULL,
1321 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1322 server->id_entry : NULL, sock);
1324 SILC_LOG_ERROR(("Could not add new server to cache"));
1325 silc_free(sock->user_data);
1326 silc_server_disconnect_remote(server, sock,
1327 "Server closed connection: "
1328 "Authentication failed");
1329 server->stat.auth_failures++;
1334 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1335 server->stat.my_servers++;
1337 server->stat.my_routers++;
1338 server->stat.servers++;
1340 id_entry = (void *)new_server;
1342 /* If the incoming connection is router and marked as backup router
1343 then add it to be one of our backups */
1344 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1345 silc_server_backup_add(server, new_server, conn->backup_local);
1347 /* Change it back to SERVER type since that's what it really is. */
1348 if (conn->backup_local) {
1349 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1350 new_server->server_type = SILC_BACKUP_ROUTER;
1355 /* If the incoming connection is normal server and marked as backup
1356 server then it will use us as backup router. We'll disable the
1357 connection until it is allowed to be used. */
1358 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER && conn->backup_router)
1359 SILC_SET_DISABLED(sock);
1362 /* Check whether this connection is to be our primary router connection
1363 if we do not already have the primary route. */
1364 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1365 if (silc_server_config_is_primary_route(server->config) &&
1369 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1370 server->standalone = FALSE;
1371 if (!server->id_entry->router) {
1372 server->id_entry->router = id_entry;
1373 server->router = id_entry;
1383 sock->type = ctx->conn_type;
1385 /* Add the common data structure to the ID entry. */
1387 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1389 /* Add to sockets internal pointer for fast referencing */
1390 silc_free(sock->user_data);
1391 sock->user_data = id_entry;
1393 /* Connection has been fully established now. Everything is ok. */
1394 SILC_LOG_DEBUG(("New connection authenticated"));
1396 /* Perform keepalive. The `hb_context' will be freed automatically
1397 when finally calling the silc_socket_free function. XXX hardcoded
1399 hb_context = silc_calloc(1, sizeof(*hb_context));
1400 hb_context->server = server;
1401 silc_socket_set_heartbeat(sock, 600, hb_context,
1402 silc_server_perform_heartbeat,
1406 silc_schedule_task_del_by_callback(server->schedule,
1407 silc_server_failure_callback);
1408 silc_protocol_free(protocol);
1410 silc_packet_context_free(ctx->packet);
1412 silc_ske_free(ctx->ske);
1413 silc_free(ctx->dest_id);
1415 sock->protocol = NULL;
1418 /* This function is used to read packets from network and send packets to
1419 network. This is usually a generic task. */
1421 SILC_TASK_CALLBACK(silc_server_packet_process)
1423 SilcServer server = (SilcServer)context;
1424 SilcSocketConnection sock = server->sockets[fd];
1425 SilcIDListData idata;
1426 SilcCipher cipher = NULL;
1427 SilcHmac hmac = NULL;
1433 SILC_LOG_DEBUG(("Processing packet"));
1435 /* Packet sending */
1437 if (type == SILC_TASK_WRITE) {
1438 /* Do not send data to disconnected connection */
1439 if (SILC_IS_DISCONNECTED(sock))
1442 server->stat.packets_sent++;
1444 if (sock->outbuf->data - sock->outbuf->head)
1445 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1447 /* Send the packet */
1448 ret = silc_packet_send(sock, TRUE);
1450 /* If returned -2 could not write to connection now, will do
1456 SILC_LOG_ERROR(("Error sending packet to connection "
1457 "%s:%d [%s]", sock->hostname, sock->port,
1458 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1459 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1460 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1465 /* The packet has been sent and now it is time to set the connection
1466 back to only for input. When there is again some outgoing data
1467 available for this connection it will be set for output as well.
1468 This call clears the output setting and sets it only for input. */
1469 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1470 SILC_UNSET_OUTBUF_PENDING(sock);
1472 silc_buffer_clear(sock->outbuf);
1476 /* Packet receiving */
1478 /* Read some data from connection */
1479 ret = silc_packet_receive(sock);
1483 SILC_LOG_ERROR(("Error receiving packet from connection "
1484 "%s:%d [%s]", sock->hostname, sock->port,
1485 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1486 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1487 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1494 SILC_LOG_DEBUG(("Read EOF"));
1496 /* If connection is disconnecting already we will finally
1497 close the connection */
1498 if (SILC_IS_DISCONNECTING(sock)) {
1499 if (sock->user_data)
1500 silc_server_free_sock_user_data(server, sock);
1501 silc_server_close_connection(server, sock);
1505 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1506 SILC_SET_DISCONNECTING(sock);
1508 if (sock->user_data)
1509 silc_server_free_sock_user_data(server, sock);
1510 silc_server_close_connection(server, sock);
1514 /* If connection is disconnecting or disconnected we will ignore
1516 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1517 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1521 server->stat.packets_received++;
1523 /* Get keys and stuff from ID entry */
1524 idata = (SilcIDListData)sock->user_data;
1526 cipher = idata->receive_key;
1527 hmac = idata->hmac_receive;
1530 /* Process the packet. This will call the parser that will then
1531 decrypt and parse the packet. */
1532 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1536 /* Callback function that the silc_packet_decrypt will call to make the
1537 decision whether the packet is normal or special packet. We will
1538 return TRUE if it is normal and FALSE if it is special */
1540 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1542 SilcPacketContext *packet,
1545 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1546 SilcServer server = (SilcServer)parse_ctx->context;
1548 /* Packet is normal packet, if:
1550 1) packet is private message packet and does not have private key set
1551 2) is other packet than channel message packet
1552 3) is channel message packet and remote is router and we are router
1554 all other packets are special packets
1557 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1558 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1561 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1562 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1563 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1564 server->server_type == SILC_ROUTER))
1570 /* Parses whole packet, received earlier. */
1572 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1574 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1575 SilcServer server = (SilcServer)parse_ctx->context;
1576 SilcSocketConnection sock = parse_ctx->sock;
1577 SilcPacketContext *packet = parse_ctx->packet;
1578 SilcIDListData idata = (SilcIDListData)sock->user_data;
1581 SILC_LOG_DEBUG(("Start"));
1583 /* Decrypt the received packet */
1584 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1585 idata ? idata->hmac_receive : NULL,
1586 packet->buffer, packet,
1587 silc_server_packet_decrypt_check, parse_ctx);
1589 SILC_LOG_WARNING(("Packet decryption failed for connection "
1590 "%s:%d [%s]", sock->hostname, sock->port,
1591 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1592 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1593 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1599 /* Parse the packet. Packet type is returned. */
1600 ret = silc_packet_parse(packet);
1602 /* Parse the packet header in special way as this is "special"
1604 ret = silc_packet_parse_special(packet);
1607 /* If entry is disabled ignore what we got. */
1608 if (ret != SILC_PACKET_RESUME_ROUTER &&
1609 idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
1612 if (ret == SILC_PACKET_NONE)
1615 /* Check that the the current client ID is same as in the client's packet. */
1616 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1617 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1618 if (client && client->id) {
1619 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1620 packet->src_id_type);
1621 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1629 if (server->server_type == SILC_ROUTER) {
1630 /* Route the packet if it is not destined to us. Other ID types but
1631 server are handled separately after processing them. */
1632 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1633 packet->dst_id_type == SILC_ID_SERVER &&
1634 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1635 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1637 /* Route the packet to fastest route for the destination ID */
1638 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1639 packet->dst_id_type);
1642 silc_server_packet_route(server,
1643 silc_server_route_get(server, id,
1644 packet->dst_id_type),
1651 /* Parse the incoming packet type */
1652 silc_server_packet_parse_type(server, sock, packet);
1654 if (server->server_type == SILC_ROUTER) {
1655 /* Broadcast packet if it is marked as broadcast packet and it is
1656 originated from router and we are router. */
1657 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1658 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1659 !server->standalone) {
1660 /* Broadcast to our primary route */
1661 silc_server_packet_broadcast(server, server->router->connection, packet);
1663 /* If we have backup routers then we need to feed all broadcast
1664 data to those servers. */
1665 silc_server_backup_broadcast(server, sock, packet);
1670 silc_packet_context_free(packet);
1671 silc_free(parse_ctx);
1674 /* Parser callback called by silc_packet_receive_process. This merely
1675 registers timeout that will handle the actual parsing when appropriate. */
1677 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1679 SilcServer server = (SilcServer)parser_context->context;
1680 SilcSocketConnection sock = parser_context->sock;
1682 switch (sock->type) {
1683 case SILC_SOCKET_TYPE_UNKNOWN:
1684 case SILC_SOCKET_TYPE_CLIENT:
1685 /* Parse the packet with timeout */
1686 silc_schedule_task_add(server->schedule, sock->sock,
1687 silc_server_packet_parse_real,
1688 (void *)parser_context, 0, 100000,
1690 SILC_TASK_PRI_NORMAL);
1692 case SILC_SOCKET_TYPE_SERVER:
1693 case SILC_SOCKET_TYPE_ROUTER:
1694 /* Packets from servers are parsed as soon as possible */
1695 silc_schedule_task_add(server->schedule, sock->sock,
1696 silc_server_packet_parse_real,
1697 (void *)parser_context, 0, 1,
1699 SILC_TASK_PRI_NORMAL);
1706 /* Parses the packet type and calls what ever routines the packet type
1707 requires. This is done for all incoming packets. */
1709 void silc_server_packet_parse_type(SilcServer server,
1710 SilcSocketConnection sock,
1711 SilcPacketContext *packet)
1713 SilcPacketType type = packet->type;
1714 SilcIDListData idata = (SilcIDListData)sock->user_data;
1716 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1718 /* Parse the packet type */
1720 case SILC_PACKET_DISCONNECT:
1721 SILC_LOG_DEBUG(("Disconnect packet"));
1722 if (packet->flags & SILC_PACKET_FLAG_LIST)
1726 case SILC_PACKET_SUCCESS:
1728 * Success received for something. For now we can have only
1729 * one protocol for connection executing at once hence this
1730 * success message is for whatever protocol is executing currently.
1732 SILC_LOG_DEBUG(("Success packet"));
1733 if (packet->flags & SILC_PACKET_FLAG_LIST)
1736 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1739 case SILC_PACKET_FAILURE:
1741 * Failure received for something. For now we can have only
1742 * one protocol for connection executing at once hence this
1743 * failure message is for whatever protocol is executing currently.
1745 SILC_LOG_DEBUG(("Failure packet"));
1746 if (packet->flags & SILC_PACKET_FLAG_LIST)
1748 if (sock->protocol) {
1749 SilcServerFailureContext f;
1750 f = silc_calloc(1, sizeof(*f));
1754 /* We will wait 5 seconds to process this failure packet */
1755 silc_schedule_task_add(server->schedule, sock->sock,
1756 silc_server_failure_callback, (void *)f, 5, 0,
1757 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1761 case SILC_PACKET_REJECT:
1762 SILC_LOG_DEBUG(("Reject packet"));
1763 if (packet->flags & SILC_PACKET_FLAG_LIST)
1768 case SILC_PACKET_NOTIFY:
1770 * Received notify packet. Server can receive notify packets from
1771 * router. Server then relays the notify messages to clients if needed.
1773 SILC_LOG_DEBUG(("Notify packet"));
1774 if (packet->flags & SILC_PACKET_FLAG_LIST)
1775 silc_server_notify_list(server, sock, packet);
1777 silc_server_notify(server, sock, packet);
1783 case SILC_PACKET_CHANNEL_MESSAGE:
1785 * Received channel message. Channel messages are special packets
1786 * (although probably most common ones) thus they are handled
1789 SILC_LOG_DEBUG(("Channel Message packet"));
1790 if (packet->flags & SILC_PACKET_FLAG_LIST)
1792 idata->last_receive = time(NULL);
1793 silc_server_channel_message(server, sock, packet);
1796 case SILC_PACKET_CHANNEL_KEY:
1798 * Received key for channel. As channels are created by the router
1799 * the keys are as well. We will distribute the key to all of our
1800 * locally connected clients on the particular channel. Router
1801 * never receives this channel and thus is ignored.
1803 SILC_LOG_DEBUG(("Channel Key packet"));
1804 if (packet->flags & SILC_PACKET_FLAG_LIST)
1806 silc_server_channel_key(server, sock, packet);
1812 case SILC_PACKET_COMMAND:
1814 * Recived command. Processes the command request and allocates the
1815 * command context and calls the command.
1817 SILC_LOG_DEBUG(("Command packet"));
1818 if (packet->flags & SILC_PACKET_FLAG_LIST)
1820 silc_server_command_process(server, sock, packet);
1823 case SILC_PACKET_COMMAND_REPLY:
1825 * Received command reply packet. Received command reply to command. It
1826 * may be reply to command sent by us or reply to command sent by client
1827 * that we've routed further.
1829 SILC_LOG_DEBUG(("Command Reply packet"));
1830 if (packet->flags & SILC_PACKET_FLAG_LIST)
1832 silc_server_command_reply(server, sock, packet);
1836 * Private Message packets
1838 case SILC_PACKET_PRIVATE_MESSAGE:
1840 * Received private message packet. The packet is coming from either
1843 SILC_LOG_DEBUG(("Private Message packet"));
1844 if (packet->flags & SILC_PACKET_FLAG_LIST)
1846 idata->last_receive = time(NULL);
1847 silc_server_private_message(server, sock, packet);
1850 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1852 * Private message key packet.
1854 if (packet->flags & SILC_PACKET_FLAG_LIST)
1856 silc_server_private_message_key(server, sock, packet);
1860 * Key Exchange protocol packets
1862 case SILC_PACKET_KEY_EXCHANGE:
1863 SILC_LOG_DEBUG(("KE packet"));
1864 if (packet->flags & SILC_PACKET_FLAG_LIST)
1867 if (sock->protocol && sock->protocol->protocol &&
1868 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1870 SilcServerKEInternalContext *proto_ctx =
1871 (SilcServerKEInternalContext *)sock->protocol->context;
1873 proto_ctx->packet = silc_packet_context_dup(packet);
1875 /* Let the protocol handle the packet */
1876 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1878 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1879 "protocol active, packet dropped."));
1883 case SILC_PACKET_KEY_EXCHANGE_1:
1884 SILC_LOG_DEBUG(("KE 1 packet"));
1885 if (packet->flags & SILC_PACKET_FLAG_LIST)
1888 if (sock->protocol && sock->protocol->protocol &&
1889 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1890 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1892 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1893 SilcServerRekeyInternalContext *proto_ctx =
1894 (SilcServerRekeyInternalContext *)sock->protocol->context;
1896 if (proto_ctx->packet)
1897 silc_packet_context_free(proto_ctx->packet);
1899 proto_ctx->packet = silc_packet_context_dup(packet);
1901 /* Let the protocol handle the packet */
1902 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1904 SilcServerKEInternalContext *proto_ctx =
1905 (SilcServerKEInternalContext *)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);
1911 proto_ctx->dest_id_type = packet->src_id_type;
1912 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1913 packet->src_id_type);
1914 if (!proto_ctx->dest_id)
1917 /* Let the protocol handle the packet */
1918 silc_protocol_execute(sock->protocol, server->schedule,
1922 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1923 "protocol active, packet dropped."));
1927 case SILC_PACKET_KEY_EXCHANGE_2:
1928 SILC_LOG_DEBUG(("KE 2 packet"));
1929 if (packet->flags & SILC_PACKET_FLAG_LIST)
1932 if (sock->protocol && sock->protocol->protocol &&
1933 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1934 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1936 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1937 SilcServerRekeyInternalContext *proto_ctx =
1938 (SilcServerRekeyInternalContext *)sock->protocol->context;
1940 if (proto_ctx->packet)
1941 silc_packet_context_free(proto_ctx->packet);
1943 proto_ctx->packet = silc_packet_context_dup(packet);
1945 /* Let the protocol handle the packet */
1946 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1948 SilcServerKEInternalContext *proto_ctx =
1949 (SilcServerKEInternalContext *)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);
1955 proto_ctx->dest_id_type = packet->src_id_type;
1956 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1957 packet->src_id_type);
1958 if (!proto_ctx->dest_id)
1961 /* Let the protocol handle the packet */
1962 silc_protocol_execute(sock->protocol, server->schedule,
1966 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1967 "protocol active, packet dropped."));
1971 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1973 * Connection authentication request packet. When we receive this packet
1974 * we will send to the other end information about our mandatory
1975 * authentication method for the connection. This packet maybe received
1978 SILC_LOG_DEBUG(("Connection authentication request packet"));
1979 if (packet->flags & SILC_PACKET_FLAG_LIST)
1981 silc_server_connection_auth_request(server, sock, packet);
1985 * Connection Authentication protocol packets
1987 case SILC_PACKET_CONNECTION_AUTH:
1988 /* Start of the authentication protocol. We receive here the
1989 authentication data and will verify it. */
1990 SILC_LOG_DEBUG(("Connection auth packet"));
1991 if (packet->flags & SILC_PACKET_FLAG_LIST)
1994 if (sock->protocol && sock->protocol->protocol->type
1995 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1997 SilcServerConnAuthInternalContext *proto_ctx =
1998 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2000 proto_ctx->packet = silc_packet_context_dup(packet);
2002 /* Let the protocol handle the packet */
2003 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2005 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2006 "protocol active, packet dropped."));
2010 case SILC_PACKET_NEW_ID:
2012 * Received New ID packet. This includes some new ID that has been
2013 * created. It may be for client, server or channel. This is the way
2014 * to distribute information about new registered entities in the
2017 SILC_LOG_DEBUG(("New ID packet"));
2018 if (packet->flags & SILC_PACKET_FLAG_LIST)
2019 silc_server_new_id_list(server, sock, packet);
2021 silc_server_new_id(server, sock, packet);
2024 case SILC_PACKET_NEW_CLIENT:
2026 * Received new client packet. This includes client information that
2027 * we will use to create initial client ID. After creating new
2028 * ID we will send it to the client.
2030 SILC_LOG_DEBUG(("New Client packet"));
2031 if (packet->flags & SILC_PACKET_FLAG_LIST)
2033 silc_server_new_client(server, sock, packet);
2036 case SILC_PACKET_NEW_SERVER:
2038 * Received new server packet. This includes Server ID and some other
2039 * information that we may save. This is received after server has
2042 SILC_LOG_DEBUG(("New Server packet"));
2043 if (packet->flags & SILC_PACKET_FLAG_LIST)
2045 silc_server_new_server(server, sock, packet);
2048 case SILC_PACKET_NEW_CHANNEL:
2050 * Received new channel packet. Information about new channel in the
2051 * network are distributed using this packet.
2053 SILC_LOG_DEBUG(("New Channel packet"));
2054 if (packet->flags & SILC_PACKET_FLAG_LIST)
2055 silc_server_new_channel_list(server, sock, packet);
2057 silc_server_new_channel(server, sock, packet);
2060 case SILC_PACKET_HEARTBEAT:
2062 * Received heartbeat.
2064 SILC_LOG_DEBUG(("Heartbeat packet"));
2065 if (packet->flags & SILC_PACKET_FLAG_LIST)
2069 case SILC_PACKET_KEY_AGREEMENT:
2071 * Received heartbeat.
2073 SILC_LOG_DEBUG(("Key agreement packet"));
2074 if (packet->flags & SILC_PACKET_FLAG_LIST)
2076 silc_server_key_agreement(server, sock, packet);
2079 case SILC_PACKET_REKEY:
2081 * Received re-key packet. The sender wants to regenerate the session
2084 SILC_LOG_DEBUG(("Re-key packet"));
2085 if (packet->flags & SILC_PACKET_FLAG_LIST)
2087 silc_server_rekey(server, sock, packet);
2090 case SILC_PACKET_REKEY_DONE:
2092 * The re-key is done.
2094 SILC_LOG_DEBUG(("Re-key done packet"));
2095 if (packet->flags & SILC_PACKET_FLAG_LIST)
2098 if (sock->protocol && sock->protocol->protocol &&
2099 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2101 SilcServerRekeyInternalContext *proto_ctx =
2102 (SilcServerRekeyInternalContext *)sock->protocol->context;
2104 if (proto_ctx->packet)
2105 silc_packet_context_free(proto_ctx->packet);
2107 proto_ctx->packet = silc_packet_context_dup(packet);
2109 /* Let the protocol handle the packet */
2110 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2112 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2113 "protocol active, packet dropped."));
2117 case SILC_PACKET_FTP:
2121 case SILC_PACKET_RESUME_ROUTER:
2122 /* Resume router packet received. This packet is received for backup
2123 router resuming protocol. */
2124 SILC_LOG_DEBUG(("Resume router packet"));
2125 if (packet->flags & SILC_PACKET_FLAG_LIST)
2127 silc_server_backup_resume_router(server, sock, packet);
2131 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2137 /* Creates connection to a remote router. */
2139 void silc_server_create_connection(SilcServer server,
2140 char *remote_host, uint32 port)
2142 SilcServerConnection sconn;
2144 /* Allocate connection object for hold connection specific stuff. */
2145 sconn = silc_calloc(1, sizeof(*sconn));
2146 sconn->server = server;
2147 sconn->remote_host = strdup(remote_host);
2148 sconn->remote_port = port;
2150 silc_schedule_task_add(server->schedule, 0,
2151 silc_server_connect_router,
2152 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2153 SILC_TASK_PRI_NORMAL);
2156 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2158 silc_socket_free((SilcSocketConnection)context);
2161 /* Closes connection to socket connection */
2163 void silc_server_close_connection(SilcServer server,
2164 SilcSocketConnection sock)
2166 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2168 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2169 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2170 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2173 /* We won't listen for this connection anymore */
2174 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2176 /* Unregister all tasks */
2177 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2179 /* Close the actual connection */
2180 silc_net_close_connection(sock->sock);
2181 server->sockets[sock->sock] = NULL;
2183 /* If sock->user_data is NULL then we'll check for active protocols
2184 here since the silc_server_free_sock_user_data has not been called
2185 for this connection. */
2186 if (!sock->user_data) {
2187 /* If any protocol is active cancel its execution. It will call
2188 the final callback which will finalize the disconnection. */
2189 if (sock->protocol) {
2190 silc_protocol_cancel(sock->protocol, server->schedule);
2191 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2192 silc_protocol_execute_final(sock->protocol, server->schedule);
2193 sock->protocol = NULL;
2198 silc_schedule_task_add(server->schedule, 0,
2199 silc_server_close_connection_final,
2200 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2201 SILC_TASK_PRI_NORMAL);
2204 /* Sends disconnect message to remote connection and disconnects the
2207 void silc_server_disconnect_remote(SilcServer server,
2208 SilcSocketConnection sock,
2209 const char *fmt, ...)
2212 unsigned char buf[4096];
2217 memset(buf, 0, sizeof(buf));
2219 vsprintf(buf, fmt, ap);
2222 SILC_LOG_DEBUG(("Disconnecting remote host"));
2224 /* Notify remote end that the conversation is over. The notify message
2225 is tried to be sent immediately. */
2226 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2227 buf, strlen(buf), TRUE);
2229 /* Mark the connection to be disconnected */
2230 SILC_SET_DISCONNECTED(sock);
2231 silc_server_close_connection(server, sock);
2236 SilcClientEntry client;
2237 } *FreeClientInternal;
2239 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2241 FreeClientInternal i = (FreeClientInternal)context;
2243 silc_idlist_del_data(i->client);
2244 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2248 /* Frees client data and notifies about client's signoff. */
2250 void silc_server_free_client_data(SilcServer server,
2251 SilcSocketConnection sock,
2252 SilcClientEntry client,
2256 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2258 /* If there is pending outgoing data for the client then purge it
2259 to the network before removing the client entry. */
2260 silc_server_packet_queue_purge(server, sock);
2262 /* Send SIGNOFF notify to routers. */
2263 if (notify && !server->standalone && server->router)
2264 silc_server_send_notify_signoff(server, server->router->connection,
2265 server->server_type == SILC_SERVER ?
2266 FALSE : TRUE, client->id, signoff);
2268 /* Remove client from all channels */
2270 silc_server_remove_from_channels(server, NULL, client,
2271 TRUE, signoff, TRUE);
2273 silc_server_remove_from_channels(server, NULL, client,
2274 FALSE, NULL, FALSE);
2276 /* We will not delete the client entry right away. We will take it
2277 into history (for WHOWAS command) for 5 minutes */
2280 silc_schedule_task_add(server->schedule, 0,
2281 silc_server_free_client_data_timeout,
2283 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2284 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2285 client->router = NULL;
2286 client->connection = NULL;
2288 /* Free the client entry and everything in it */
2289 server->stat.my_clients--;
2290 server->stat.clients--;
2291 if (server->server_type == SILC_ROUTER)
2292 server->stat.cell_clients--;
2295 /* Frees user_data pointer from socket connection object. This also sends
2296 appropriate notify packets to the network to inform about leaving
2299 void silc_server_free_sock_user_data(SilcServer server,
2300 SilcSocketConnection sock)
2302 SILC_LOG_DEBUG(("Start"));
2304 switch (sock->type) {
2305 case SILC_SOCKET_TYPE_CLIENT:
2307 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2308 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2311 case SILC_SOCKET_TYPE_SERVER:
2312 case SILC_SOCKET_TYPE_ROUTER:
2314 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2315 SilcServerEntry backup_router = NULL;
2317 /* If this was our primary router connection then we're lost to
2318 the outside world. */
2319 if (server->router == user_data) {
2320 backup_router = silc_server_backup_get(server);
2322 /* Check whether we have a backup router connection */
2323 if (!backup_router || backup_router == user_data) {
2324 silc_schedule_task_add(server->schedule, 0,
2325 silc_server_connect_to_router,
2328 SILC_TASK_PRI_NORMAL);
2330 server->id_entry->router = NULL;
2331 server->router = NULL;
2332 server->standalone = TRUE;
2333 backup_router = NULL;
2335 SILC_LOG_INFO(("New primary router is backup router %s",
2336 backup_router->server_name));
2337 SILC_LOG_DEBUG(("New primary router is backup router %s",
2338 backup_router->server_name));
2339 server->id_entry->router = backup_router;
2340 server->router = backup_router;
2341 server->router_connect = time(0);
2342 if (server->server_type == SILC_BACKUP_ROUTER) {
2343 server->server_type = SILC_ROUTER;
2345 /* We'll need to constantly try to reconnect to the primary
2346 router so that we'll see when it comes back online. */
2347 silc_server_backup_reconnect(server, sock->ip, sock->port,
2348 silc_server_backup_connected,
2352 /* Mark this connection as replaced */
2353 silc_server_backup_replaced_add(server, user_data->id,
2358 if (!backup_router) {
2359 /* Free all client entries that this server owns as they will
2360 become invalid now as well. */
2362 silc_server_remove_clients_by_server(server, user_data, TRUE);
2364 /* Update the client entries of this server to the new backup
2365 router. This also removes the clients that *really* was owned
2366 by the primary router and went down with the router. */
2367 silc_server_update_clients_by_server(server, user_data, backup_router,
2371 /* Free the server entry */
2372 silc_server_backup_del(server, user_data);
2373 silc_server_backup_replaced_del(server, user_data);
2374 silc_idlist_del_data(user_data);
2375 silc_idlist_del_server(server->local_list, user_data);
2376 server->stat.my_servers--;
2377 server->stat.servers--;
2378 if (server->server_type == SILC_ROUTER)
2379 server->stat.cell_servers--;
2381 if (backup_router) {
2382 /* Announce all of our stuff that was created about 5 minutes ago.
2383 The backup router knows all the other stuff already. */
2384 if (server->server_type == SILC_ROUTER)
2385 silc_server_announce_servers(server, FALSE, 0,
2386 server->router->connection);
2388 /* Announce our clients and channels to the router */
2389 silc_server_announce_clients(server, 0,
2390 server->router->connection);
2391 silc_server_announce_channels(server, 0,
2392 server->router->connection);
2394 if (server->server_type == SILC_ROUTER)
2395 silc_server_announce_servers(server, FALSE, time(0) - 300,
2396 server->router->connection);
2398 /* Announce our clients and channels to the router */
2399 silc_server_announce_clients(server, time(0) - 300,
2400 server->router->connection);
2401 silc_server_announce_channels(server, time(0) - 300,
2402 server->router->connection);
2409 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2411 silc_idlist_del_data(user_data);
2412 silc_free(user_data);
2417 /* If any protocol is active cancel its execution */
2418 if (sock->protocol) {
2419 silc_protocol_cancel(sock->protocol, server->schedule);
2420 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2421 silc_protocol_execute_final(sock->protocol, server->schedule);
2422 sock->protocol = NULL;
2425 sock->user_data = NULL;
2428 /* Removes client from all channels it has joined. This is used when client
2429 connection is disconnected. If the client on a channel is last, the
2430 channel is removed as well. This sends the SIGNOFF notify types. */
2432 void silc_server_remove_from_channels(SilcServer server,
2433 SilcSocketConnection sock,
2434 SilcClientEntry client,
2436 char *signoff_message,
2439 SilcChannelEntry channel;
2440 SilcChannelClientEntry chl;
2441 SilcHashTableList htl;
2444 SILC_LOG_DEBUG(("Start"));
2446 if (!client || !client->id)
2449 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2451 /* Remove the client from all channels. The client is removed from
2452 the channels' user list. */
2453 silc_hash_table_list(client->channels, &htl);
2454 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2455 channel = chl->channel;
2457 /* Remove channel from client's channel list */
2458 silc_hash_table_del(client->channels, channel);
2460 /* Remove channel if there is no users anymore */
2461 if (server->server_type == SILC_ROUTER &&
2462 silc_hash_table_count(channel->user_list) < 2) {
2464 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2465 if (!silc_idlist_del_channel(server->local_list, channel))
2466 silc_idlist_del_channel(server->global_list, channel);
2467 server->stat.my_channels--;
2471 /* Remove client from channel's client list */
2472 silc_hash_table_del(channel->user_list, chl->client);
2474 /* If there is no global users on the channel anymore mark the channel
2475 as local channel. Do not check if the removed client is local client. */
2476 if (server->server_type != SILC_ROUTER && channel->global_users &&
2477 chl->client->router && !silc_server_channel_has_global(channel))
2478 channel->global_users = FALSE;
2481 server->stat.my_chanclients--;
2483 /* If there is not at least one local user on the channel then we don't
2484 need the channel entry anymore, we can remove it safely. */
2485 if (server->server_type != SILC_ROUTER &&
2486 !silc_server_channel_has_local(channel)) {
2487 /* Notify about leaving client if this channel has global users. */
2488 if (notify && channel->global_users)
2489 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2490 SILC_NOTIFY_TYPE_SIGNOFF,
2491 signoff_message ? 2 : 1,
2492 clidp->data, clidp->len,
2493 signoff_message, signoff_message ?
2494 strlen(signoff_message) : 0);
2497 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2499 if (channel->founder_key) {
2500 /* The founder auth data exists, do not remove the channel entry */
2501 SilcChannelClientEntry chl2;
2502 SilcHashTableList htl2;
2506 silc_hash_table_list(channel->user_list, &htl2);
2507 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2508 silc_hash_table_del(chl2->client->channels, channel);
2509 silc_hash_table_del(channel->user_list, chl2->client);
2515 /* Remove the channel entry */
2516 if (!silc_idlist_del_channel(server->local_list, channel))
2517 silc_idlist_del_channel(server->global_list, channel);
2518 server->stat.my_channels--;
2522 /* Send notify to channel about client leaving SILC and thus
2523 the entire channel. */
2525 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2526 SILC_NOTIFY_TYPE_SIGNOFF,
2527 signoff_message ? 2 : 1,
2528 clidp->data, clidp->len,
2529 signoff_message, signoff_message ?
2530 strlen(signoff_message) : 0);
2532 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2533 /* Re-generate channel key */
2534 if (!silc_server_create_channel_key(server, channel, 0))
2537 /* Send the channel key to the channel. The key of course is not sent
2538 to the client who was removed from the channel. */
2539 silc_server_send_channel_key(server, client->connection, channel,
2540 server->server_type == SILC_ROUTER ?
2541 FALSE : !server->standalone);
2545 silc_buffer_free(clidp);
2548 /* Removes client from one channel. This is used for example when client
2549 calls LEAVE command to remove itself from the channel. Returns TRUE
2550 if channel still exists and FALSE if the channel is removed when
2551 last client leaves the channel. If `notify' is FALSE notify messages
2554 int silc_server_remove_from_one_channel(SilcServer server,
2555 SilcSocketConnection sock,
2556 SilcChannelEntry channel,
2557 SilcClientEntry client,
2560 SilcChannelClientEntry chl;
2563 SILC_LOG_DEBUG(("Start"));
2565 /* Get the entry to the channel, if this client is not on the channel
2567 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2570 /* Remove the client from the channel. The client is removed from
2571 the channel's user list. */
2573 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2575 /* Remove channel from client's channel list */
2576 silc_hash_table_del(client->channels, chl->channel);
2578 /* Remove channel if there is no users anymore */
2579 if (server->server_type == SILC_ROUTER &&
2580 silc_hash_table_count(channel->user_list) < 2) {
2582 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2583 if (!silc_idlist_del_channel(server->local_list, channel))
2584 silc_idlist_del_channel(server->global_list, channel);
2585 silc_buffer_free(clidp);
2586 server->stat.my_channels--;
2590 /* Remove client from channel's client list */
2591 silc_hash_table_del(channel->user_list, chl->client);
2593 /* If there is no global users on the channel anymore mark the channel
2594 as local channel. Do not check if the client is local client. */
2595 if (server->server_type != SILC_ROUTER && channel->global_users &&
2596 chl->client->router && !silc_server_channel_has_global(channel))
2597 channel->global_users = FALSE;
2600 server->stat.my_chanclients--;
2602 /* If there is not at least one local user on the channel then we don't
2603 need the channel entry anymore, we can remove it safely. */
2604 if (server->server_type != SILC_ROUTER &&
2605 !silc_server_channel_has_local(channel)) {
2606 /* Notify about leaving client if this channel has global users. */
2607 if (notify && channel->global_users)
2608 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2609 SILC_NOTIFY_TYPE_LEAVE, 1,
2610 clidp->data, clidp->len);
2612 silc_buffer_free(clidp);
2615 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2617 if (channel->founder_key) {
2618 /* The founder auth data exists, do not remove the channel entry */
2619 SilcChannelClientEntry chl2;
2620 SilcHashTableList htl2;
2624 silc_hash_table_list(channel->user_list, &htl2);
2625 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2626 silc_hash_table_del(chl2->client->channels, channel);
2627 silc_hash_table_del(channel->user_list, chl2->client);
2633 /* Remove the channel entry */
2634 if (!silc_idlist_del_channel(server->local_list, channel))
2635 silc_idlist_del_channel(server->global_list, channel);
2636 server->stat.my_channels--;
2640 /* Send notify to channel about client leaving the channel */
2642 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2643 SILC_NOTIFY_TYPE_LEAVE, 1,
2644 clidp->data, clidp->len);
2646 silc_buffer_free(clidp);
2650 /* Timeout callback. This is called if connection is idle or for some
2651 other reason is not responding within some period of time. This
2652 disconnects the remote end. */
2654 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2656 SilcServer server = (SilcServer)context;
2657 SilcSocketConnection sock = server->sockets[fd];
2659 SILC_LOG_DEBUG(("Start"));
2664 /* If we have protocol active we must assure that we call the protocol's
2665 final callback so that all the memory is freed. */
2666 if (sock->protocol) {
2667 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2668 silc_protocol_execute_final(sock->protocol, server->schedule);
2672 if (sock->user_data)
2673 silc_server_free_sock_user_data(server, sock);
2675 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2676 "Connection timeout");
2679 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2680 function may be used only by router. In real SILC network all channels
2681 are created by routers thus this function is never used by normal
2684 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2685 SilcServerID *router_id,
2691 SilcChannelID *channel_id;
2692 SilcChannelEntry entry;
2696 SILC_LOG_DEBUG(("Creating new channel"));
2699 cipher = SILC_DEFAULT_CIPHER;
2701 hmac = SILC_DEFAULT_HMAC;
2703 /* Allocate cipher */
2704 if (!silc_cipher_alloc(cipher, &key))
2708 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2709 silc_cipher_free(key);
2713 channel_name = strdup(channel_name);
2715 /* Create the channel */
2716 if (!silc_id_create_channel_id(server, router_id, server->rng,
2718 silc_free(channel_name);
2719 silc_cipher_free(key);
2720 silc_hmac_free(newhmac);
2723 entry = silc_idlist_add_channel(server->local_list, channel_name,
2724 SILC_CHANNEL_MODE_NONE, channel_id,
2725 NULL, key, newhmac);
2727 silc_free(channel_name);
2728 silc_cipher_free(key);
2729 silc_hmac_free(newhmac);
2733 entry->cipher = strdup(cipher);
2734 entry->hmac_name = strdup(hmac);
2736 /* Now create the actual key material */
2737 if (!silc_server_create_channel_key(server, entry,
2738 silc_cipher_get_key_len(key) / 8)) {
2739 silc_free(channel_name);
2740 silc_cipher_free(key);
2741 silc_hmac_free(newhmac);
2742 silc_free(entry->cipher);
2743 silc_free(entry->hmac_name);
2747 /* Notify other routers about the new channel. We send the packet
2748 to our primary route. */
2749 if (broadcast && server->standalone == FALSE)
2750 silc_server_send_new_channel(server, server->router->connection, TRUE,
2751 channel_name, entry->id,
2752 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2755 server->stat.my_channels++;
2760 /* Same as above but creates the channel with Channel ID `channel_id. */
2763 silc_server_create_new_channel_with_id(SilcServer server,
2767 SilcChannelID *channel_id,
2770 SilcChannelEntry entry;
2774 SILC_LOG_DEBUG(("Creating new channel"));
2777 cipher = SILC_DEFAULT_CIPHER;
2779 hmac = SILC_DEFAULT_HMAC;
2781 /* Allocate cipher */
2782 if (!silc_cipher_alloc(cipher, &key))
2786 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2787 silc_cipher_free(key);
2791 channel_name = strdup(channel_name);
2793 /* Create the channel */
2794 entry = silc_idlist_add_channel(server->local_list, channel_name,
2795 SILC_CHANNEL_MODE_NONE, channel_id,
2796 NULL, key, newhmac);
2798 silc_free(channel_name);
2802 /* Now create the actual key material */
2803 if (!silc_server_create_channel_key(server, entry,
2804 silc_cipher_get_key_len(key) / 8)) {
2805 silc_free(channel_name);
2809 /* Notify other routers about the new channel. We send the packet
2810 to our primary route. */
2811 if (broadcast && server->standalone == FALSE)
2812 silc_server_send_new_channel(server, server->router->connection, TRUE,
2813 channel_name, entry->id,
2814 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2817 server->stat.my_channels++;
2822 /* Channel's key re-key timeout callback. */
2824 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2826 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2827 SilcServer server = (SilcServer)rekey->context;
2831 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2834 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2837 /* Generates new channel key. This is used to create the initial channel key
2838 but also to re-generate new key for channel. If `key_len' is provided
2839 it is the bytes of the key length. */
2841 bool silc_server_create_channel_key(SilcServer server,
2842 SilcChannelEntry channel,
2846 unsigned char channel_key[32], hash[32];
2849 SILC_LOG_DEBUG(("Generating channel key"));
2851 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2852 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2856 if (!channel->channel_key)
2857 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2862 else if (channel->key_len)
2863 len = channel->key_len / 8;
2865 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2867 /* Create channel key */
2868 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2871 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2873 /* Remove old key if exists */
2875 memset(channel->key, 0, channel->key_len / 8);
2876 silc_free(channel->key);
2880 channel->key_len = len * 8;
2881 channel->key = silc_calloc(len, sizeof(*channel->key));
2882 memcpy(channel->key, channel_key, len);
2883 memset(channel_key, 0, sizeof(channel_key));
2885 /* Generate HMAC key from the channel key data and set it */
2887 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2888 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2889 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2890 memset(hash, 0, sizeof(hash));
2892 if (server->server_type == SILC_ROUTER) {
2893 if (!channel->rekey)
2894 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2895 channel->rekey->context = (void *)server;
2896 channel->rekey->channel = channel;
2897 channel->rekey->key_len = key_len;
2898 if (channel->rekey->task)
2899 silc_schedule_task_del(server->schedule, channel->rekey->task);
2901 channel->rekey->task =
2902 silc_schedule_task_add(server->schedule, 0,
2903 silc_server_channel_key_rekey,
2904 (void *)channel->rekey, 3600, 0,
2906 SILC_TASK_PRI_NORMAL);
2912 /* Saves the channel key found in the encoded `key_payload' buffer. This
2913 function is used when we receive Channel Key Payload and also when we're
2914 processing JOIN command reply. Returns entry to the channel. */
2916 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2917 SilcBuffer key_payload,
2918 SilcChannelEntry channel)
2920 SilcChannelKeyPayload payload = NULL;
2921 SilcChannelID *id = NULL;
2922 unsigned char *tmp, hash[32];
2926 SILC_LOG_DEBUG(("Start"));
2928 /* Decode channel key payload */
2929 payload = silc_channel_key_payload_parse(key_payload);
2931 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2936 /* Get the channel entry */
2939 /* Get channel ID */
2940 tmp = silc_channel_key_get_id(payload, &tmp_len);
2941 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2947 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2949 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2951 SILC_LOG_ERROR(("Received key for non-existent channel"));
2957 tmp = silc_channel_key_get_key(payload, &tmp_len);
2963 cipher = silc_channel_key_get_cipher(payload, NULL);
2969 /* Remove old key if exists */
2971 memset(channel->key, 0, channel->key_len / 8);
2972 silc_free(channel->key);
2973 silc_cipher_free(channel->channel_key);
2976 /* Create new cipher */
2977 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2982 if (channel->cipher)
2983 silc_free(channel->cipher);
2984 channel->cipher = strdup(cipher);
2987 channel->key_len = tmp_len * 8;
2988 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2989 memcpy(channel->key, tmp, tmp_len);
2990 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2992 /* Generate HMAC key from the channel key data and set it */
2994 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2995 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2996 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2998 memset(hash, 0, sizeof(hash));
2999 memset(tmp, 0, tmp_len);
3001 if (server->server_type == SILC_ROUTER) {
3002 if (!channel->rekey)
3003 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3004 channel->rekey->context = (void *)server;
3005 channel->rekey->channel = channel;
3006 if (channel->rekey->task)
3007 silc_schedule_task_del(server->schedule, channel->rekey->task);
3009 channel->rekey->task =
3010 silc_schedule_task_add(server->schedule, 0,
3011 silc_server_channel_key_rekey,
3012 (void *)channel->rekey, 3600, 0,
3014 SILC_TASK_PRI_NORMAL);
3020 silc_channel_key_payload_free(payload);
3025 /* Heartbeat callback. This function is set as argument for the
3026 silc_socket_set_heartbeat function. The library will call this function
3027 at the set time interval. */
3029 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3032 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3034 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3037 /* Send the heartbeat */
3038 silc_server_send_heartbeat(hb->server, sock);
3041 /* Returns assembled of all servers in the given ID list. The packet's
3042 form is dictated by the New ID payload. */
3044 static void silc_server_announce_get_servers(SilcServer server,
3045 SilcServerEntry remote,
3047 SilcBuffer *servers,
3048 unsigned long creation_time)
3050 SilcIDCacheList list;
3051 SilcIDCacheEntry id_cache;
3052 SilcServerEntry entry;
3055 /* Go through all clients in the list */
3056 if (silc_idcache_get_all(id_list->servers, &list)) {
3057 if (silc_idcache_list_first(list, &id_cache)) {
3059 entry = (SilcServerEntry)id_cache->context;
3061 /* Do not announce the one we've sending our announcements and
3062 do not announce ourself. Also check the creation time if it's
3064 if ((entry == remote) || (entry == server->id_entry) ||
3065 (creation_time && entry->data.created < creation_time)) {
3066 if (!silc_idcache_list_next(list, &id_cache))
3071 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3073 *servers = silc_buffer_realloc(*servers,
3075 (*servers)->truelen + idp->len :
3077 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3078 silc_buffer_put(*servers, idp->data, idp->len);
3079 silc_buffer_pull(*servers, idp->len);
3080 silc_buffer_free(idp);
3082 if (!silc_idcache_list_next(list, &id_cache))
3087 silc_idcache_list_free(list);
3091 /* This function is used by router to announce existing servers to our
3092 primary router when we've connected to it. If `creation_time' is non-zero
3093 then only the servers that has been created after the `creation_time'
3094 will be announced. */
3096 void silc_server_announce_servers(SilcServer server, bool global,
3097 unsigned long creation_time,
3098 SilcSocketConnection remote)
3100 SilcBuffer servers = NULL;
3102 SILC_LOG_DEBUG(("Announcing servers"));
3104 /* Get servers in local list */
3105 silc_server_announce_get_servers(server, remote->user_data,
3106 server->local_list, &servers,
3110 /* Get servers in global list */
3111 silc_server_announce_get_servers(server, remote->user_data,
3112 server->global_list, &servers,
3116 silc_buffer_push(servers, servers->data - servers->head);
3117 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3119 /* Send the packet */
3120 silc_server_packet_send(server, remote,
3121 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3122 servers->data, servers->len, TRUE);
3124 silc_buffer_free(servers);
3128 /* Returns assembled packet of all clients in the given ID list. The
3129 packet's form is dictated by the New ID Payload. */
3131 static void silc_server_announce_get_clients(SilcServer server,
3133 SilcBuffer *clients,
3134 unsigned long creation_time)
3136 SilcIDCacheList list;
3137 SilcIDCacheEntry id_cache;
3138 SilcClientEntry client;
3141 /* Go through all clients in the list */
3142 if (silc_idcache_get_all(id_list->clients, &list)) {
3143 if (silc_idcache_list_first(list, &id_cache)) {
3145 client = (SilcClientEntry)id_cache->context;
3147 if (creation_time && client->data.created < creation_time) {
3148 if (!silc_idcache_list_next(list, &id_cache))
3153 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3155 *clients = silc_buffer_realloc(*clients,
3157 (*clients)->truelen + idp->len :
3159 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3160 silc_buffer_put(*clients, idp->data, idp->len);
3161 silc_buffer_pull(*clients, idp->len);
3162 silc_buffer_free(idp);
3164 if (!silc_idcache_list_next(list, &id_cache))
3169 silc_idcache_list_free(list);
3173 /* This function is used to announce our existing clients to our router
3174 when we've connected to it. If `creation_time' is non-zero then only
3175 the clients that has been created after the `creation_time' will be
3178 void silc_server_announce_clients(SilcServer server,
3179 unsigned long creation_time,
3180 SilcSocketConnection remote)
3182 SilcBuffer clients = NULL;
3184 SILC_LOG_DEBUG(("Announcing clients"));
3186 /* Get clients in local list */
3187 silc_server_announce_get_clients(server, server->local_list,
3188 &clients, creation_time);
3190 /* As router we announce our global list as well */
3191 if (server->server_type == SILC_ROUTER)
3192 silc_server_announce_get_clients(server, server->global_list,
3193 &clients, creation_time);
3196 silc_buffer_push(clients, clients->data - clients->head);
3197 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3199 /* Send the packet */
3200 silc_server_packet_send(server, remote,
3201 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3202 clients->data, clients->len, TRUE);
3204 silc_buffer_free(clients);
3209 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3215 p = silc_notify_payload_encode(notify, argc, ap);
3221 /* Returns assembled packets for channel users of the `channel'. */
3223 void silc_server_announce_get_channel_users(SilcServer server,
3224 SilcChannelEntry channel,
3225 SilcBuffer *channel_users,
3226 SilcBuffer *channel_users_modes)
3228 SilcChannelClientEntry chl;
3229 SilcHashTableList htl;
3230 SilcBuffer chidp, clidp;
3233 unsigned char mode[4];
3235 SILC_LOG_DEBUG(("Start"));
3237 /* Now find all users on the channel */
3238 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3239 silc_hash_table_list(channel->user_list, &htl);
3240 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3241 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3244 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3245 clidp->data, clidp->len,
3246 chidp->data, chidp->len);
3249 silc_buffer_realloc(*channel_users,
3251 (*channel_users)->truelen + len : len));
3252 silc_buffer_pull_tail(*channel_users,
3253 ((*channel_users)->end -
3254 (*channel_users)->data));
3256 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3257 silc_buffer_pull(*channel_users, len);
3258 silc_buffer_free(tmp);
3260 /* CUMODE notify for mode change on the channel */
3261 SILC_PUT32_MSB(chl->mode, mode);
3262 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3263 3, clidp->data, clidp->len,
3265 clidp->data, clidp->len);
3267 *channel_users_modes =
3268 silc_buffer_realloc(*channel_users_modes,
3269 (*channel_users_modes ?
3270 (*channel_users_modes)->truelen + len : len));
3271 silc_buffer_pull_tail(*channel_users_modes,
3272 ((*channel_users_modes)->end -
3273 (*channel_users_modes)->data));
3275 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3276 silc_buffer_pull(*channel_users_modes, len);
3277 silc_buffer_free(tmp);
3279 silc_buffer_free(clidp);
3281 silc_buffer_free(chidp);
3284 /* Returns assembled packets for all channels and users on those channels
3285 from the given ID List. The packets are in the form dictated by the
3286 New Channel and New Channel User payloads. */
3288 void silc_server_announce_get_channels(SilcServer server,
3290 SilcBuffer *channels,
3291 SilcBuffer *channel_users,
3292 SilcBuffer **channel_users_modes,
3293 uint32 *channel_users_modes_c,
3294 SilcChannelID ***channel_ids,
3295 unsigned long creation_time)
3297 SilcIDCacheList list;
3298 SilcIDCacheEntry id_cache;
3299 SilcChannelEntry channel;
3304 int i = *channel_users_modes_c;
3307 SILC_LOG_DEBUG(("Start"));
3309 /* Go through all channels in the list */
3310 if (silc_idcache_get_all(id_list->channels, &list)) {
3311 if (silc_idcache_list_first(list, &id_cache)) {
3313 channel = (SilcChannelEntry)id_cache->context;
3315 if (creation_time && channel->created < creation_time)
3320 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3321 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3322 name_len = strlen(channel->channel_name);
3325 len = 4 + name_len + id_len + 4;
3327 silc_buffer_realloc(*channels,
3328 (*channels ? (*channels)->truelen +
3330 silc_buffer_pull_tail(*channels,
3331 ((*channels)->end - (*channels)->data));
3332 silc_buffer_format(*channels,
3333 SILC_STR_UI_SHORT(name_len),
3334 SILC_STR_UI_XNSTRING(channel->channel_name,
3336 SILC_STR_UI_SHORT(id_len),
3337 SILC_STR_UI_XNSTRING(cid, id_len),
3338 SILC_STR_UI_INT(channel->mode),
3340 silc_buffer_pull(*channels, len);
3343 *channel_users_modes = silc_realloc(*channel_users_modes,
3344 sizeof(**channel_users_modes) *
3346 (*channel_users_modes)[i] = NULL;
3347 *channel_ids = silc_realloc(*channel_ids,
3348 sizeof(**channel_ids) * (i + 1));
3349 (*channel_ids)[i] = NULL;
3350 silc_server_announce_get_channel_users(server, channel,
3352 channel_users_modes[i]);
3353 (*channel_ids)[i] = channel->id;
3356 if (!silc_idcache_list_next(list, &id_cache))
3360 *channel_users_modes_c += i;
3363 silc_idcache_list_free(list);
3367 /* This function is used to announce our existing channels to our router
3368 when we've connected to it. This also announces the users on the
3369 channels to the router. If the `creation_time' is non-zero only the
3370 channels that was created after the `creation_time' are announced.
3371 Note that the channel users are still announced even if the `creation_time'
3374 void silc_server_announce_channels(SilcServer server,
3375 unsigned long creation_time,
3376 SilcSocketConnection remote)
3378 SilcBuffer channels = NULL, channel_users = NULL;
3379 SilcBuffer *channel_users_modes = NULL;
3380 uint32 channel_users_modes_c = 0;
3381 SilcChannelID **channel_ids = NULL;
3383 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3385 /* Get channels and channel users in local list */
3386 silc_server_announce_get_channels(server, server->local_list,
3387 &channels, &channel_users,
3388 &channel_users_modes,
3389 &channel_users_modes_c,
3390 &channel_ids, creation_time);
3392 /* Get channels and channel users in global list */
3393 silc_server_announce_get_channels(server, server->global_list,
3394 &channels, &channel_users,
3395 &channel_users_modes,
3396 &channel_users_modes_c,
3397 &channel_ids, creation_time);
3400 silc_buffer_push(channels, channels->data - channels->head);
3401 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3403 /* Send the packet */
3404 silc_server_packet_send(server, remote,
3405 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3406 channels->data, channels->len,
3409 silc_buffer_free(channels);
3412 if (channel_users) {
3413 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3414 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3415 channel_users->len);
3417 /* Send the packet */
3418 silc_server_packet_send(server, remote,
3419 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3420 channel_users->data, channel_users->len,
3423 silc_buffer_free(channel_users);
3426 if (channel_users_modes) {
3429 for (i = 0; i < channel_users_modes_c; i++) {
3430 silc_buffer_push(channel_users_modes[i],
3431 channel_users_modes[i]->data -
3432 channel_users_modes[i]->head);
3433 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3434 channel_users_modes[i]->len);
3435 silc_server_packet_send_dest(server, remote,
3436 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3437 channel_ids[i], SILC_ID_CHANNEL,
3438 channel_users_modes[i]->data,
3439 channel_users_modes[i]->len,
3441 silc_buffer_free(channel_users_modes[i]);
3443 silc_free(channel_users_modes);
3444 silc_free(channel_ids);
3448 /* Failure timeout callback. If this is called then we will immediately
3449 process the received failure. We always process the failure with timeout
3450 since we do not want to blindly trust to received failure packets.
3451 This won't be called (the timeout is cancelled) if the failure was
3452 bogus (it is bogus if remote does not close the connection after sending
3455 SILC_TASK_CALLBACK(silc_server_failure_callback)
3457 SilcServerFailureContext f = (SilcServerFailureContext)context;
3459 if (f->sock->protocol) {
3460 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3461 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3467 /* Assembles user list and users mode list from the `channel'. */
3469 void silc_server_get_users_on_channel(SilcServer server,
3470 SilcChannelEntry channel,
3471 SilcBuffer *user_list,
3472 SilcBuffer *mode_list,
3475 SilcChannelClientEntry chl;
3476 SilcHashTableList htl;
3477 SilcBuffer client_id_list;
3478 SilcBuffer client_mode_list;
3480 uint32 list_count = 0, len = 0;
3482 silc_hash_table_list(channel->user_list, &htl);
3483 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3484 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3486 client_id_list = silc_buffer_alloc(len);
3488 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3489 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3490 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3492 silc_hash_table_list(channel->user_list, &htl);
3493 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3495 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3496 silc_buffer_put(client_id_list, idp->data, idp->len);
3497 silc_buffer_pull(client_id_list, idp->len);
3498 silc_buffer_free(idp);
3500 /* Client's mode on channel */
3501 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3502 silc_buffer_pull(client_mode_list, 4);
3506 silc_buffer_push(client_id_list,
3507 client_id_list->data - client_id_list->head);
3508 silc_buffer_push(client_mode_list,
3509 client_mode_list->data - client_mode_list->head);
3511 *user_list = client_id_list;
3512 *mode_list = client_mode_list;
3513 *user_count = list_count;
3516 /* Saves users and their modes to the `channel'. */
3518 void silc_server_save_users_on_channel(SilcServer server,
3519 SilcSocketConnection sock,
3520 SilcChannelEntry channel,
3521 SilcClientID *noadd,
3522 SilcBuffer user_list,
3523 SilcBuffer mode_list,
3528 for (i = 0; i < user_count; i++) {
3531 SilcClientID *client_id;
3532 SilcClientEntry client;
3535 SILC_GET16_MSB(idp_len, user_list->data + 2);
3537 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3538 silc_buffer_pull(user_list, idp_len);
3543 SILC_GET32_MSB(mode, mode_list->data);
3544 silc_buffer_pull(mode_list, 4);
3546 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3547 silc_free(client_id);
3551 /* Check if we have this client cached already. */
3552 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3553 server->server_type, NULL);
3555 client = silc_idlist_find_client_by_id(server->global_list,
3556 client_id, server->server_type,
3559 /* If router did not find such Client ID in its lists then this must
3560 be bogus client or some router in the net is buggy. */
3561 if (server->server_type == SILC_ROUTER) {
3562 silc_free(client_id);
3566 /* We don't have that client anywhere, add it. The client is added
3567 to global list since server didn't have it in the lists so it must be
3569 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3570 silc_id_dup(client_id, SILC_ID_CLIENT),
3571 sock->user_data, NULL);
3573 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3574 silc_free(client_id);
3578 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3581 silc_free(client_id);
3583 if (!silc_server_client_on_channel(client, channel)) {
3584 /* Client was not on the channel, add it. */
3585 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3586 chl->client = client;
3588 chl->channel = channel;
3589 silc_hash_table_add(channel->user_list, chl->client, chl);
3590 silc_hash_table_add(client->channels, chl->channel, chl);
3595 /* Lookups route to the client indicated by the `id_data'. The connection
3596 object and internal data object is returned. Returns NULL if route
3597 could not be found to the client. If the `client_id' is specified then
3598 it is used and the `id_data' is ignored. */
3600 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3601 unsigned char *id_data,
3603 SilcClientID *client_id,
3604 SilcIDListData *idata)
3607 SilcClientEntry client;
3609 SILC_LOG_DEBUG(("Start"));
3611 /* Decode destination Client ID */
3613 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3615 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3619 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3622 /* If the destination belongs to our server we don't have to route
3623 the packet anywhere but to send it to the local destination. */
3624 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3628 /* If we are router and the client has router then the client is in
3629 our cell but not directly connected to us. */
3630 if (server->server_type == SILC_ROUTER && client->router) {
3631 /* We are of course in this case the client's router thus the route
3632 to the client is the server who owns the client. So, we will send
3633 the packet to that server. */
3635 *idata = (SilcIDListData)client->router;
3636 return client->router->connection;
3639 /* Seems that client really is directly connected to us */
3641 *idata = (SilcIDListData)client;
3642 return client->connection;
3645 /* Destination belongs to someone not in this server. If we are normal
3646 server our action is to send the packet to our router. */
3647 if (server->server_type != SILC_ROUTER && !server->standalone) {
3650 *idata = (SilcIDListData)server->router;
3651 return server->router->connection;
3654 /* We are router and we will perform route lookup for the destination
3655 and send the packet to fastest route. */
3656 if (server->server_type == SILC_ROUTER && !server->standalone) {
3657 /* Check first that the ID is valid */
3658 client = silc_idlist_find_client_by_id(server->global_list, id,
3661 SilcSocketConnection dst_sock;
3663 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3667 *idata = (SilcIDListData)dst_sock->user_data;
3676 /* Encodes and returns channel list of channels the `client' has joined.
3677 Secret channels are not put to the list. */
3679 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3680 SilcClientEntry client)
3682 SilcBuffer buffer = NULL;
3683 SilcChannelEntry channel;
3684 SilcChannelClientEntry chl;
3685 SilcHashTableList htl;
3691 silc_hash_table_list(client->channels, &htl);
3692 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3693 channel = chl->channel;
3695 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3696 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3699 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3700 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3701 name_len = strlen(channel->channel_name);
3703 len = 4 + name_len + id_len + 4;
3704 buffer = silc_buffer_realloc(buffer,
3705 (buffer ? (buffer)->truelen + len : len));
3706 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3707 silc_buffer_format(buffer,
3708 SILC_STR_UI_SHORT(name_len),
3709 SILC_STR_UI_XNSTRING(channel->channel_name,
3711 SILC_STR_UI_SHORT(id_len),
3712 SILC_STR_UI_XNSTRING(cid, id_len),
3713 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3715 silc_buffer_pull(buffer, len);
3720 silc_buffer_push(buffer, buffer->data - buffer->head);
3725 /* Finds client entry by Client ID and if it is not found then resolves
3726 it using WHOIS command. */
3728 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3729 SilcClientID *client_id)
3731 SilcClientEntry client;
3733 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3736 client = silc_idlist_find_client_by_id(server->global_list,
3737 client_id, TRUE, NULL);
3738 if (!client && server->server_type == SILC_ROUTER)
3742 if (!client && server->standalone)
3745 if (!client || !client->nickname || !client->username) {
3746 SilcBuffer buffer, idp;
3748 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3749 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3750 client->resolve_cmd_ident = ++server->cmd_ident;
3752 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3753 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3754 server->cmd_ident, 1,
3755 3, idp->data, idp->len);
3756 silc_server_packet_send(server, client ? client->router->connection :
3757 server->router->connection,
3758 SILC_PACKET_COMMAND, 0,
3759 buffer->data, buffer->len, FALSE);
3760 silc_buffer_free(idp);
3761 silc_buffer_free(buffer);
3768 /* A timeout callback for the re-key. We will be the initiator of the
3771 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3773 SilcSocketConnection sock = (SilcSocketConnection)context;
3774 SilcIDListData idata = (SilcIDListData)sock->user_data;
3775 SilcServer server = (SilcServer)idata->rekey->context;
3776 SilcProtocol protocol;
3777 SilcServerRekeyInternalContext *proto_ctx;
3779 SILC_LOG_DEBUG(("Start"));
3781 /* Allocate internal protocol context. This is sent as context
3783 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3784 proto_ctx->server = (void *)server;
3785 proto_ctx->sock = sock;
3786 proto_ctx->responder = FALSE;
3787 proto_ctx->pfs = idata->rekey->pfs;
3789 /* Perform rekey protocol. Will call the final callback after the
3790 protocol is over. */
3791 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3792 &protocol, proto_ctx, silc_server_rekey_final);
3793 sock->protocol = protocol;
3795 /* Run the protocol */
3796 silc_protocol_execute(protocol, server->schedule, 0, 0);
3798 /* Re-register re-key timeout */
3799 silc_schedule_task_add(server->schedule, sock->sock,
3800 silc_server_rekey_callback,
3801 context, idata->rekey->timeout, 0,
3802 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3805 /* The final callback for the REKEY protocol. This will actually take the
3806 new key material into use. */
3808 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3810 SilcProtocol protocol = (SilcProtocol)context;
3811 SilcServerRekeyInternalContext *ctx =
3812 (SilcServerRekeyInternalContext *)protocol->context;
3813 SilcServer server = (SilcServer)ctx->server;
3814 SilcSocketConnection sock = ctx->sock;
3816 SILC_LOG_DEBUG(("Start"));
3818 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3819 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3820 /* Error occured during protocol */
3821 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3822 silc_protocol_cancel(protocol, server->schedule);
3823 silc_protocol_free(protocol);
3824 sock->protocol = NULL;
3826 silc_packet_context_free(ctx->packet);
3828 silc_ske_free(ctx->ske);
3833 /* Purge the outgoing data queue to assure that all rekey packets really
3834 go to the network before we quit the protocol. */
3835 silc_server_packet_queue_purge(server, sock);
3838 silc_protocol_free(protocol);
3839 sock->protocol = NULL;
3841 silc_packet_context_free(ctx->packet);
3843 silc_ske_free(ctx->ske);