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;
315 server->id_entry->server_type = SILC_BACKUP_ROUTER;
322 /* Register the ID Cache purge task. This periodically purges the ID cache
323 and removes the expired cache entries. */
325 /* Clients local list */
326 purge = silc_calloc(1, sizeof(*purge));
327 purge->cache = server->local_list->clients;
328 purge->schedule = server->schedule;
329 silc_schedule_task_add(purge->schedule, 0,
331 (void *)purge, 600, 0,
332 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
334 /* Clients global list */
335 purge = silc_calloc(1, sizeof(*purge));
336 purge->cache = server->global_list->clients;
337 purge->schedule = server->schedule;
338 silc_schedule_task_add(purge->schedule, 0,
340 (void *)purge, 300, 0,
341 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
343 SILC_LOG_DEBUG(("Server initialized"));
345 /* We are done here, return succesfully */
349 for (i = 0; i < sock_count; i++)
350 silc_net_close_server(sock[i]);
355 /* Fork server to background and set gid+uid to non-root.
356 Silcd will not run as root, so trying to set either user or group to
357 root will cause silcd to exit. */
359 void silc_server_daemonise(SilcServer server)
361 /* Are we executing silcd as root or a regular user? */
368 if (!server->config->identity || !server->config->identity->user ||
369 !server->config->identity->group) {
370 fprintf(stderr, "Error:"
371 "\tSILC server must not be run as root. For the security of your\n"
372 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
373 "\tuser account. Modify the [Identity] configuration section to run\n"
374 "\tthe server as non-root user.\n");
378 /* Get the values given for user and group in configuration file */
379 user=server->config->identity->user;
380 group=server->config->identity->group;
382 /* Check whether the user/group information is text */
383 if (atoi(user)!=0 || atoi(group)!=0) {
384 SILC_LOG_DEBUG(("Invalid user and/or group information"));
385 SILC_LOG_DEBUG(("User and/or group given as number"));
386 fprintf(stderr, "Invalid user and/or group information\n");
387 fprintf(stderr, "Please assign them as names, not numbers\n");
391 /* Catch the nasty incident of string "0" returning 0 from atoi */
392 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
393 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
394 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
402 fprintf(stderr, "No such user %s found\n", user);
407 fprintf(stderr, "No such group %s found\n", group);
411 /* Check whether user and/or group is set to root. If yes, exit
412 immediately. Otherwise, setgid and setuid server to user.group */
413 if (gr->gr_gid==0 || pw->pw_uid==0) {
414 fprintf(stderr, "Error:"
415 "\tSILC server must not be run as root. For the security of your\n"
416 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
417 "\tuser account. Modify the [Identity] configuration section to run\n"
418 "\tthe server as non-root user.\n");
421 /* Fork server to background, making it a daemon */
423 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
424 SILC_LOG_DEBUG(("Forking SILC server to background"));
429 SILC_LOG_DEBUG(("Changing to group %s", group));
430 if(setgid(gr->gr_gid)==0) {
431 SILC_LOG_DEBUG(("Setgid to %s", group));
433 SILC_LOG_DEBUG(("Setgid to %s failed", group));
434 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
438 SILC_LOG_DEBUG(("Changing to user nobody"));
439 if(setuid(pw->pw_uid)==0) {
440 SILC_LOG_DEBUG(("Setuid to %s", user));
442 SILC_LOG_DEBUG(("Setuid to %s failed", user));
443 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
449 /* Fork server to background, making it a daemon */
451 SILC_LOG_DEBUG(("Server started as user"));
452 SILC_LOG_DEBUG(("Forking SILC server to background"));
459 /* The heart of the server. This runs the scheduler thus runs the server.
460 When this returns the server has been stopped and the program will
463 void silc_server_run(SilcServer server)
465 SILC_LOG_DEBUG(("Running server"));
467 SILC_LOG_INFO(("SILC Server started"));
469 /* Start the scheduler, the heart of the SILC server. When this returns
470 the program will be terminated. */
471 silc_schedule(server->schedule);
474 /* Stops the SILC server. This function is used to shutdown the server.
475 This is usually called after the scheduler has returned. After stopping
476 the server one should call silc_server_free. */
478 void silc_server_stop(SilcServer server)
480 SILC_LOG_DEBUG(("Stopping server"));
482 silc_schedule_stop(server->schedule);
483 silc_schedule_uninit(server->schedule);
485 silc_server_protocols_unregister();
487 SILC_LOG_DEBUG(("Server stopped"));
490 /* Function that is called when the network connection to a router has
491 been established. This will continue with the key exchange protocol
492 with the remote router. */
494 void silc_server_start_key_exchange(SilcServer server,
495 SilcServerConnection sconn,
498 SilcSocketConnection newsocket;
499 SilcProtocol protocol;
500 SilcServerKEInternalContext *proto_ctx;
503 /* Set socket options */
504 silc_net_set_socket_nonblock(sock);
505 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
507 /* Create socket connection for the connection. Even though we
508 know that we are connecting to a router we will mark the socket
509 to be unknown connection until we have executed authentication
511 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
512 server->sockets[sock] = newsocket;
513 newsocket->hostname = strdup(sconn->remote_host);
514 newsocket->ip = strdup(sconn->remote_host);
515 newsocket->port = sconn->remote_port;
516 sconn->sock = newsocket;
518 /* Allocate internal protocol context. This is sent as context
520 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
521 proto_ctx->server = (void *)server;
522 proto_ctx->context = (void *)sconn;
523 proto_ctx->sock = newsocket;
524 proto_ctx->rng = server->rng;
525 proto_ctx->responder = FALSE;
527 /* Perform key exchange protocol. silc_server_connect_to_router_second
528 will be called after the protocol is finished. */
529 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
530 &protocol, proto_ctx,
531 silc_server_connect_to_router_second);
532 newsocket->protocol = protocol;
534 /* Register a timeout task that will be executed if the protocol
535 is not executed within set limit. */
536 proto_ctx->timeout_task =
537 silc_schedule_task_add(server->schedule, sock,
538 silc_server_timeout_remote,
539 server, server->params->protocol_timeout,
540 server->params->protocol_timeout_usec,
544 /* Register the connection for network input and output. This sets
545 that scheduler will listen for incoming packets for this connection
546 and sets that outgoing packets may be sent to this connection as
547 well. However, this doesn't set the scheduler for outgoing traffic,
548 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
549 later when outgoing data is available. */
550 context = (void *)server;
551 SILC_REGISTER_CONNECTION_FOR_IO(sock);
553 /* Run the protocol */
554 silc_protocol_execute(protocol, server->schedule, 0, 0);
557 /* Timeout callback that will be called to retry connecting to remote
558 router. This is used by both normal and router server. This will wait
559 before retrying the connecting. The timeout is generated by exponential
560 backoff algorithm. */
562 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
564 SilcServerConnection sconn = (SilcServerConnection)context;
565 SilcServer server = sconn->server;
567 SILC_LOG_INFO(("Retrying connecting to a router"));
569 /* Calculate next timeout */
570 if (sconn->retry_count >= 1) {
571 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
572 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
573 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
575 sconn->retry_timeout = server->params->retry_interval_min;
577 sconn->retry_count++;
578 sconn->retry_timeout = sconn->retry_timeout +
579 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
581 /* If we've reached max retry count, give up. */
582 if (sconn->retry_count > server->params->retry_count &&
583 server->params->retry_keep_trying == FALSE) {
584 SILC_LOG_ERROR(("Could not connect to router, giving up"));
588 /* Wait one before retrying */
589 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
590 context, sconn->retry_timeout,
591 server->params->retry_interval_min_usec,
592 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
595 /* Generic routine to use connect to a router. */
597 SILC_TASK_CALLBACK(silc_server_connect_router)
599 SilcServerConnection sconn = (SilcServerConnection)context;
600 SilcServer server = sconn->server;
603 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
604 (sconn->backup ? "backup router" : "router"),
605 sconn->remote_host, sconn->remote_port));
607 server->router_connect = time(0);
609 /* Connect to remote host */
610 sock = silc_net_create_connection(server->config->listen_port->local_ip,
614 SILC_LOG_ERROR(("Could not connect to router"));
615 silc_schedule_task_add(server->schedule, fd,
616 silc_server_connect_to_router_retry,
617 context, 0, 1, SILC_TASK_TIMEOUT,
618 SILC_TASK_PRI_NORMAL);
622 /* Continue with key exchange protocol */
623 silc_server_start_key_exchange(server, sconn, sock);
626 /* This function connects to our primary router or if we are a router this
627 establishes all our primary routes. This is called at the start of the
628 server to do authentication and key exchange with our router - called
631 SILC_TASK_CALLBACK(silc_server_connect_to_router)
633 SilcServer server = (SilcServer)context;
634 SilcServerConnection sconn;
635 SilcServerConfigSectionServerConnection *ptr;
637 SILC_LOG_DEBUG(("Connecting to router(s)"));
639 if (server->server_type == SILC_SERVER) {
640 SILC_LOG_DEBUG(("We are normal server"));
641 } else if (server->server_type == SILC_ROUTER) {
642 SILC_LOG_DEBUG(("We are router"));
644 SILC_LOG_DEBUG(("We are backup router/normal server"));
647 /* Create the connections to all our routes */
648 ptr = server->config->routers;
651 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
652 ptr->backup_router ? "Backup router" : "Router",
653 ptr->initiator ? "Initiator" : "Responder",
654 ptr->host, ptr->port));
656 if (ptr->initiator) {
657 /* Allocate connection object for hold connection specific stuff. */
658 sconn = silc_calloc(1, sizeof(*sconn));
659 sconn->server = server;
660 sconn->remote_host = strdup(ptr->host);
661 sconn->remote_port = ptr->port;
662 sconn->backup = ptr->backup_router;
664 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
665 sconn->backup_replace_port = ptr->backup_replace_port;
668 silc_schedule_task_add(server->schedule, fd,
669 silc_server_connect_router,
670 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
671 SILC_TASK_PRI_NORMAL);
680 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
682 /* There wasn't a configured router, we will continue but we don't
683 have a connection to outside world. We will be standalone server. */
684 server->standalone = TRUE;
687 /* Second part of connecting to router(s). Key exchange protocol has been
688 executed and now we will execute authentication protocol. */
690 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
692 SilcProtocol protocol = (SilcProtocol)context;
693 SilcServerKEInternalContext *ctx =
694 (SilcServerKEInternalContext *)protocol->context;
695 SilcServer server = (SilcServer)ctx->server;
696 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
697 SilcSocketConnection sock = ctx->sock;
698 SilcServerConnAuthInternalContext *proto_ctx;
699 SilcServerConfigSectionServerConnection *conn = NULL;
701 SILC_LOG_DEBUG(("Start"));
703 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
704 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
705 /* Error occured during protocol */
706 silc_protocol_free(protocol);
707 sock->protocol = NULL;
708 silc_ske_free_key_material(ctx->keymat);
710 silc_packet_context_free(ctx->packet);
712 silc_ske_free(ctx->ske);
713 silc_free(ctx->dest_id);
715 silc_schedule_task_del_by_callback(server->schedule,
716 silc_server_failure_callback);
717 silc_server_disconnect_remote(server, sock, "Server closed connection: "
718 "Key exchange failed");
722 /* We now have the key material as the result of the key exchange
723 protocol. Take the key material into use. Free the raw key material
724 as soon as we've set them into use. */
725 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
726 ctx->ske->prop->cipher,
727 ctx->ske->prop->pkcs,
728 ctx->ske->prop->hash,
729 ctx->ske->prop->hmac,
730 ctx->ske->prop->group,
732 silc_protocol_free(protocol);
733 sock->protocol = NULL;
734 silc_ske_free_key_material(ctx->keymat);
736 silc_packet_context_free(ctx->packet);
738 silc_ske_free(ctx->ske);
739 silc_free(ctx->dest_id);
741 silc_schedule_task_del_by_callback(server->schedule,
742 silc_server_failure_callback);
743 silc_server_disconnect_remote(server, sock, "Server closed connection: "
744 "Key exchange failed");
747 silc_ske_free_key_material(ctx->keymat);
749 /* Allocate internal context for the authentication protocol. This
750 is sent as context for the protocol. */
751 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
752 proto_ctx->server = (void *)server;
753 proto_ctx->context = (void *)sconn;
754 proto_ctx->sock = sock;
755 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
756 proto_ctx->dest_id_type = ctx->dest_id_type;
757 proto_ctx->dest_id = ctx->dest_id;
759 /* Resolve the authentication method used in this connection. Check if
760 we find a match from user configured connections */
761 conn = silc_server_config_find_router_conn(server->config,
765 /* Match found. Use the configured authentication method */
766 proto_ctx->auth_meth = conn->auth_meth;
767 if (conn->auth_data) {
768 proto_ctx->auth_data = strdup(conn->auth_data);
769 proto_ctx->auth_data_len = strlen(conn->auth_data);
772 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
773 sock->hostname, sock->ip, sock->port));
774 silc_protocol_free(protocol);
775 sock->protocol = NULL;
777 silc_packet_context_free(ctx->packet);
779 silc_ske_free(ctx->ske);
780 silc_free(ctx->dest_id);
782 silc_schedule_task_del_by_callback(server->schedule,
783 silc_server_failure_callback);
784 silc_server_disconnect_remote(server, sock, "Server closed connection: "
785 "Key exchange failed");
789 /* Free old protocol as it is finished now */
790 silc_protocol_free(protocol);
792 silc_packet_context_free(ctx->packet);
794 sock->protocol = NULL;
796 /* Allocate the authentication protocol. This is allocated here
797 but we won't start it yet. We will be receiving party of this
798 protocol thus we will wait that connecting party will make
800 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
801 &sock->protocol, proto_ctx,
802 silc_server_connect_to_router_final);
804 /* Register timeout task. If the protocol is not executed inside
805 this timelimit the connection will be terminated. Currently
806 this is 15 seconds and is hard coded limit (XXX). */
807 proto_ctx->timeout_task =
808 silc_schedule_task_add(server->schedule, sock->sock,
809 silc_server_timeout_remote,
810 (void *)server, 15, 0,
814 /* Run the protocol */
815 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
818 /* Finalizes the connection to router. Registers a server task to the
819 queue so that we can accept new connections. */
821 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
823 SilcProtocol protocol = (SilcProtocol)context;
824 SilcServerConnAuthInternalContext *ctx =
825 (SilcServerConnAuthInternalContext *)protocol->context;
826 SilcServer server = (SilcServer)ctx->server;
827 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
828 SilcSocketConnection sock = ctx->sock;
829 SilcServerEntry id_entry;
831 SilcServerHBContext hb_context;
832 unsigned char *id_string;
834 SilcIDListData idata;
836 SILC_LOG_DEBUG(("Start"));
838 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
839 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
840 /* Error occured during protocol */
841 silc_free(ctx->dest_id);
842 silc_server_disconnect_remote(server, sock, "Server closed connection: "
843 "Authentication failed");
847 /* Add a task to the queue. This task receives new connections to the
848 server. This task remains on the queue until the end of the program. */
849 if (!server->listenning && !sconn->backup) {
850 silc_schedule_task_add(server->schedule, server->sock,
851 silc_server_accept_new_connection,
852 (void *)server, 0, 0,
854 SILC_TASK_PRI_NORMAL);
855 server->listenning = TRUE;
858 /* Send NEW_SERVER packet to the router. We will become registered
859 to the SILC network after sending this packet. */
860 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
861 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
862 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
863 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
864 silc_buffer_format(packet,
865 SILC_STR_UI_SHORT(id_len),
866 SILC_STR_UI_XNSTRING(id_string, id_len),
867 SILC_STR_UI_SHORT(strlen(server->server_name)),
868 SILC_STR_UI_XNSTRING(server->server_name,
869 strlen(server->server_name)),
872 /* Send the packet */
873 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
874 packet->data, packet->len, TRUE);
875 silc_buffer_free(packet);
876 silc_free(id_string);
878 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
880 /* Check that we do not have this ID already */
881 id_entry = silc_idlist_find_server_by_id(server->local_list,
882 ctx->dest_id, TRUE, NULL);
884 silc_idcache_del_by_context(server->local_list->servers, id_entry);
886 id_entry = silc_idlist_find_server_by_id(server->global_list,
887 ctx->dest_id, TRUE, NULL);
889 silc_idcache_del_by_context(server->global_list->servers, id_entry);
892 SILC_LOG_DEBUG(("New server id(%s)",
893 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
895 /* Add the connected router to global server list */
896 id_entry = silc_idlist_add_server(server->global_list,
897 strdup(sock->hostname),
898 SILC_ROUTER, ctx->dest_id, NULL, sock);
900 silc_free(ctx->dest_id);
901 silc_server_disconnect_remote(server, sock, "Server closed connection: "
902 "Authentication failed");
906 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
907 silc_free(sock->user_data);
908 sock->user_data = (void *)id_entry;
909 sock->type = SILC_SOCKET_TYPE_ROUTER;
910 idata = (SilcIDListData)sock->user_data;
911 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
913 /* Perform keepalive. The `hb_context' will be freed automatically
914 when finally calling the silc_socket_free function. XXX hardcoded
916 hb_context = silc_calloc(1, sizeof(*hb_context));
917 hb_context->server = server;
918 silc_socket_set_heartbeat(sock, 600, hb_context,
919 silc_server_perform_heartbeat,
922 /* Register re-key timeout */
923 idata->rekey->timeout = 3600; /* XXX hardcoded */
924 idata->rekey->context = (void *)server;
925 silc_schedule_task_add(server->schedule, sock->sock,
926 silc_server_rekey_callback,
927 (void *)sock, idata->rekey->timeout, 0,
928 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
930 if (!sconn->backup) {
931 /* Mark this router our primary router if we're still standalone */
932 if (server->standalone) {
933 server->id_entry->router = id_entry;
934 server->router = id_entry;
935 server->standalone = FALSE;
937 /* If we are router then announce our possible servers. */
938 if (server->server_type == SILC_ROUTER)
939 silc_server_announce_servers(server, FALSE, 0,
940 server->router->connection);
942 /* Announce our clients and channels to the router */
943 silc_server_announce_clients(server, 0, server->router->connection);
944 silc_server_announce_channels(server, 0, server->router->connection);
947 /* Add this server to be our backup router */
948 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
949 sconn->backup_replace_port, FALSE);
952 sock->protocol = NULL;
954 /* Call the completion callback to indicate that we've connected to
957 (*sconn->callback)(server, id_entry, sconn->callback_context);
960 /* Free the temporary connection data context */
962 silc_free(sconn->remote_host);
963 silc_free(sconn->backup_replace_ip);
967 /* Free the protocol object */
968 if (sock->protocol == protocol)
969 sock->protocol = NULL;
970 silc_protocol_free(protocol);
972 silc_packet_context_free(ctx->packet);
974 silc_ske_free(ctx->ske);
978 /* Host lookup callbcak that is called after the incoming connection's
979 IP and FQDN lookup is performed. This will actually check the acceptance
980 of the incoming connection and will register the key exchange protocol
981 for this connection. */
984 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
987 SilcServer server = (SilcServer)context;
988 SilcServerKEInternalContext *proto_ctx;
989 void *cconfig, *sconfig, *rconfig;
990 SilcServerConfigSectionDenyConnection *deny;
993 SILC_LOG_DEBUG(("Start"));
995 /* Check whether we could resolve both IP and FQDN. */
996 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
997 server->params->require_reverse_mapping)) {
998 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
999 sock->hostname ? sock->hostname :
1000 sock->ip ? sock->ip : ""));
1001 server->stat.conn_failures++;
1002 silc_server_disconnect_remote(server, sock,
1003 "Server closed connection: Unknown host");
1007 /* Register the connection for network input and output. This sets
1008 that scheduler will listen for incoming packets for this connection
1009 and sets that outgoing packets may be sent to this connection as well.
1010 However, this doesn't set the scheduler for outgoing traffic, it
1011 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1012 later when outgoing data is available. */
1013 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1015 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
1018 port = server->sockets[server->sock]->port; /* Listenning port */
1020 /* Check whether this connection is denied to connect to us. */
1021 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1023 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1026 /* The connection is denied */
1027 SILC_LOG_INFO(("Connection %s (%s) is denied",
1028 sock->hostname, sock->ip));
1029 silc_server_disconnect_remote(server, sock, deny->comment ?
1031 "Server closed connection: "
1032 "Connection refused");
1033 server->stat.conn_failures++;
1037 /* Check whether we have configred this sort of connection at all. We
1038 have to check all configurations since we don't know what type of
1039 connection this is. */
1040 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1042 cconfig = silc_server_config_find_client_conn(server->config,
1045 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1048 sconfig = silc_server_config_find_server_conn(server->config,
1051 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1053 rconfig = silc_server_config_find_router_conn(server->config,
1056 if (!cconfig && !sconfig && !rconfig) {
1057 silc_server_disconnect_remote(server, sock,
1058 "Server closed connection: "
1059 "Connection refused");
1060 server->stat.conn_failures++;
1064 /* The connection is allowed */
1066 /* Allocate internal context for key exchange protocol. This is
1067 sent as context for the protocol. */
1068 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1069 proto_ctx->server = context;
1070 proto_ctx->sock = sock;
1071 proto_ctx->rng = server->rng;
1072 proto_ctx->responder = TRUE;
1073 proto_ctx->cconfig = cconfig;
1074 proto_ctx->sconfig = sconfig;
1075 proto_ctx->rconfig = rconfig;
1077 /* Prepare the connection for key exchange protocol. We allocate the
1078 protocol but will not start it yet. The connector will be the
1079 initiator of the protocol thus we will wait for initiation from
1080 there before we start the protocol. */
1081 server->stat.auth_attempts++;
1082 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1083 &sock->protocol, proto_ctx,
1084 silc_server_accept_new_connection_second);
1086 /* Register a timeout task that will be executed if the connector
1087 will not start the key exchange protocol within 60 seconds. For
1088 now, this is a hard coded limit. After 60 secs the connection will
1089 be closed if the key exchange protocol has not been started. */
1090 proto_ctx->timeout_task =
1091 silc_schedule_task_add(server->schedule, sock->sock,
1092 silc_server_timeout_remote,
1098 /* Accepts new connections to the server. Accepting new connections are
1099 done in three parts to make it async. */
1101 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1103 SilcServer server = (SilcServer)context;
1104 SilcSocketConnection newsocket;
1107 SILC_LOG_DEBUG(("Accepting new connection"));
1109 server->stat.conn_attempts++;
1111 sock = silc_net_accept_connection(server->sock);
1113 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1114 server->stat.conn_failures++;
1118 /* Check max connections */
1119 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1120 SILC_LOG_ERROR(("Refusing connection, server is full"));
1121 server->stat.conn_failures++;
1125 /* Set socket options */
1126 silc_net_set_socket_nonblock(sock);
1127 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1129 /* We don't create a ID yet, since we don't know what type of connection
1130 this is yet. But, we do add the connection to the socket table. */
1131 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1132 server->sockets[sock] = newsocket;
1134 /* Perform asynchronous host lookup. This will lookup the IP and the
1135 FQDN of the remote connection. After the lookup is done the connection
1136 is accepted further. */
1137 silc_socket_host_lookup(newsocket, TRUE,
1138 silc_server_accept_new_connection_lookup, context,
1142 /* Second part of accepting new connection. Key exchange protocol has been
1143 performed and now it is time to do little connection authentication
1144 protocol to figure out whether this connection is client or server
1145 and whether it has right to access this server (especially server
1146 connections needs to be authenticated). */
1148 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1150 SilcProtocol protocol = (SilcProtocol)context;
1151 SilcServerKEInternalContext *ctx =
1152 (SilcServerKEInternalContext *)protocol->context;
1153 SilcServer server = (SilcServer)ctx->server;
1154 SilcSocketConnection sock = ctx->sock;
1155 SilcServerConnAuthInternalContext *proto_ctx;
1157 SILC_LOG_DEBUG(("Start"));
1159 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1160 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1161 /* Error occured during protocol */
1162 silc_protocol_free(protocol);
1163 sock->protocol = NULL;
1164 silc_ske_free_key_material(ctx->keymat);
1166 silc_packet_context_free(ctx->packet);
1168 silc_ske_free(ctx->ske);
1169 silc_free(ctx->dest_id);
1171 silc_schedule_task_del_by_callback(server->schedule,
1172 silc_server_failure_callback);
1173 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1174 "Key exchange failed");
1175 server->stat.auth_failures++;
1179 /* We now have the key material as the result of the key exchange
1180 protocol. Take the key material into use. Free the raw key material
1181 as soon as we've set them into use. */
1182 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1183 ctx->ske->prop->cipher,
1184 ctx->ske->prop->pkcs,
1185 ctx->ske->prop->hash,
1186 ctx->ske->prop->hmac,
1187 ctx->ske->prop->group,
1189 silc_protocol_free(protocol);
1190 sock->protocol = NULL;
1191 silc_ske_free_key_material(ctx->keymat);
1193 silc_packet_context_free(ctx->packet);
1195 silc_ske_free(ctx->ske);
1196 silc_free(ctx->dest_id);
1198 silc_schedule_task_del_by_callback(server->schedule,
1199 silc_server_failure_callback);
1200 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1201 "Key exchange failed");
1202 server->stat.auth_failures++;
1205 silc_ske_free_key_material(ctx->keymat);
1207 /* Allocate internal context for the authentication protocol. This
1208 is sent as context for the protocol. */
1209 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1210 proto_ctx->server = (void *)server;
1211 proto_ctx->sock = sock;
1212 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1213 proto_ctx->responder = TRUE;
1214 proto_ctx->dest_id_type = ctx->dest_id_type;
1215 proto_ctx->dest_id = ctx->dest_id;
1216 proto_ctx->cconfig = ctx->cconfig;
1217 proto_ctx->sconfig = ctx->sconfig;
1218 proto_ctx->rconfig = ctx->rconfig;
1220 /* Free old protocol as it is finished now */
1221 silc_protocol_free(protocol);
1223 silc_packet_context_free(ctx->packet);
1225 sock->protocol = NULL;
1227 /* Allocate the authentication protocol. This is allocated here
1228 but we won't start it yet. We will be receiving party of this
1229 protocol thus we will wait that connecting party will make
1230 their first move. */
1231 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1232 &sock->protocol, proto_ctx,
1233 silc_server_accept_new_connection_final);
1235 /* Register timeout task. If the protocol is not executed inside
1236 this timelimit the connection will be terminated. Currently
1237 this is 60 seconds and is hard coded limit (XXX). */
1238 proto_ctx->timeout_task =
1239 silc_schedule_task_add(server->schedule, sock->sock,
1240 silc_server_timeout_remote,
1241 (void *)server, 60, 0,
1246 /* Final part of accepting new connection. The connection has now
1247 been authenticated and keys has been exchanged. We also know whether
1248 this is client or server connection. */
1250 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1252 SilcProtocol protocol = (SilcProtocol)context;
1253 SilcServerConnAuthInternalContext *ctx =
1254 (SilcServerConnAuthInternalContext *)protocol->context;
1255 SilcServer server = (SilcServer)ctx->server;
1256 SilcSocketConnection sock = ctx->sock;
1257 SilcServerHBContext hb_context;
1258 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1259 void *id_entry = NULL;
1261 SILC_LOG_DEBUG(("Start"));
1263 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1264 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1265 /* Error occured during protocol */
1266 silc_protocol_free(protocol);
1267 sock->protocol = NULL;
1269 silc_packet_context_free(ctx->packet);
1271 silc_ske_free(ctx->ske);
1272 silc_free(ctx->dest_id);
1275 sock->protocol = NULL;
1276 silc_schedule_task_del_by_callback(server->schedule,
1277 silc_server_failure_callback);
1278 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1279 "Authentication failed");
1280 server->stat.auth_failures++;
1284 entry->data.last_receive = time(NULL);
1286 switch (ctx->conn_type) {
1287 case SILC_SOCKET_TYPE_CLIENT:
1289 SilcClientEntry client;
1291 SILC_LOG_DEBUG(("Remote host is client"));
1292 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1295 /* Add the client to the client ID cache. The nickname and Client ID
1296 and other information is created after we have received NEW_CLIENT
1297 packet from client. */
1298 client = silc_idlist_add_client(server->local_list,
1299 NULL, NULL, NULL, NULL, NULL, sock);
1301 SILC_LOG_ERROR(("Could not add new client to cache"));
1302 silc_free(sock->user_data);
1303 silc_server_disconnect_remote(server, sock,
1304 "Server closed connection: "
1305 "Authentication failed");
1306 server->stat.auth_failures++;
1311 server->stat.my_clients++;
1312 server->stat.clients++;
1313 if (server->server_type == SILC_ROUTER)
1314 server->stat.cell_clients++;
1316 id_entry = (void *)client;
1319 case SILC_SOCKET_TYPE_SERVER:
1320 case SILC_SOCKET_TYPE_ROUTER:
1322 SilcServerEntry new_server;
1323 SilcServerConfigSectionServerConnection *conn =
1324 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1325 ctx->sconfig : ctx->rconfig;
1327 SILC_LOG_DEBUG(("Remote host is %s",
1328 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1329 "server" : (conn->backup_router ?
1330 "backup router" : "router")));
1331 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1332 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1333 "server" : (conn->backup_router ?
1334 "backup router" : "router")));
1336 /* Add the server into server cache. The server name and Server ID
1337 is updated after we have received NEW_SERVER packet from the
1338 server. We mark ourselves as router for this server if we really
1341 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1342 server->local_list : (conn->backup_router ?
1343 server->local_list :
1344 server->global_list)),
1346 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1347 SILC_SERVER : SILC_ROUTER),
1349 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1350 server->id_entry : (conn->backup_router ?
1351 server->id_entry : NULL)),
1354 SILC_LOG_ERROR(("Could not add new server to cache"));
1355 silc_free(sock->user_data);
1356 silc_server_disconnect_remote(server, sock,
1357 "Server closed connection: "
1358 "Authentication failed");
1359 server->stat.auth_failures++;
1364 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1365 server->stat.my_servers++;
1367 server->stat.my_routers++;
1368 server->stat.servers++;
1370 id_entry = (void *)new_server;
1372 /* If the incoming connection is router and marked as backup router
1373 then add it to be one of our backups */
1374 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1375 silc_server_backup_add(server, new_server, conn->backup_replace_ip,
1376 conn->backup_replace_port, conn->backup_local);
1378 /* Change it back to SERVER type since that's what it really is. */
1379 if (conn->backup_local)
1380 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1382 new_server->server_type = SILC_BACKUP_ROUTER;
1385 /* Check whether this connection is to be our primary router connection
1386 if we do not already have the primary route. */
1387 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1388 if (silc_server_config_is_primary_route(server->config) &&
1392 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1393 server->standalone = FALSE;
1394 if (!server->id_entry->router) {
1395 server->id_entry->router = id_entry;
1396 server->router = id_entry;
1406 sock->type = ctx->conn_type;
1408 /* Add the common data structure to the ID entry. */
1410 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1412 /* Add to sockets internal pointer for fast referencing */
1413 silc_free(sock->user_data);
1414 sock->user_data = id_entry;
1416 /* Connection has been fully established now. Everything is ok. */
1417 SILC_LOG_DEBUG(("New connection authenticated"));
1419 /* Perform keepalive. The `hb_context' will be freed automatically
1420 when finally calling the silc_socket_free function. XXX hardcoded
1422 hb_context = silc_calloc(1, sizeof(*hb_context));
1423 hb_context->server = server;
1424 silc_socket_set_heartbeat(sock, 600, hb_context,
1425 silc_server_perform_heartbeat,
1429 silc_schedule_task_del_by_callback(server->schedule,
1430 silc_server_failure_callback);
1431 silc_protocol_free(protocol);
1433 silc_packet_context_free(ctx->packet);
1435 silc_ske_free(ctx->ske);
1436 silc_free(ctx->dest_id);
1438 sock->protocol = NULL;
1441 /* This function is used to read packets from network and send packets to
1442 network. This is usually a generic task. */
1444 SILC_TASK_CALLBACK(silc_server_packet_process)
1446 SilcServer server = (SilcServer)context;
1447 SilcSocketConnection sock = server->sockets[fd];
1448 SilcIDListData idata;
1449 SilcCipher cipher = NULL;
1450 SilcHmac hmac = NULL;
1451 uint32 sequence = 0;
1457 SILC_LOG_DEBUG(("Processing packet"));
1459 /* Packet sending */
1461 if (type == SILC_TASK_WRITE) {
1462 /* Do not send data to disconnected connection */
1463 if (SILC_IS_DISCONNECTED(sock))
1466 server->stat.packets_sent++;
1468 if (sock->outbuf->data - sock->outbuf->head)
1469 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1471 /* Send the packet */
1472 ret = silc_packet_send(sock, TRUE);
1474 /* If returned -2 could not write to connection now, will do
1480 SILC_LOG_ERROR(("Error sending packet to connection "
1481 "%s:%d [%s]", sock->hostname, sock->port,
1482 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1483 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1484 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1489 /* The packet has been sent and now it is time to set the connection
1490 back to only for input. When there is again some outgoing data
1491 available for this connection it will be set for output as well.
1492 This call clears the output setting and sets it only for input. */
1493 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1494 SILC_UNSET_OUTBUF_PENDING(sock);
1496 silc_buffer_clear(sock->outbuf);
1500 /* Packet receiving */
1502 /* Read some data from connection */
1503 ret = silc_packet_receive(sock);
1507 SILC_LOG_ERROR(("Error receiving packet from connection "
1508 "%s:%d [%s]", sock->hostname, sock->port,
1509 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1510 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1511 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1518 SILC_LOG_DEBUG(("Read EOF"));
1520 /* If connection is disconnecting already we will finally
1521 close the connection */
1522 if (SILC_IS_DISCONNECTING(sock)) {
1523 if (sock->user_data)
1524 silc_server_free_sock_user_data(server, sock);
1525 silc_server_close_connection(server, sock);
1529 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1530 SILC_SET_DISCONNECTING(sock);
1532 if (sock->user_data)
1533 silc_server_free_sock_user_data(server, sock);
1534 silc_server_close_connection(server, sock);
1538 /* If connection is disconnecting or disconnected we will ignore
1540 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1541 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1545 server->stat.packets_received++;
1547 /* Get keys and stuff from ID entry */
1548 idata = (SilcIDListData)sock->user_data;
1550 cipher = idata->receive_key;
1551 hmac = idata->hmac_receive;
1552 sequence = idata->psn_receive;
1555 /* Process the packet. This will call the parser that will then
1556 decrypt and parse the packet. */
1557 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1558 TRUE : FALSE, cipher, hmac, sequence,
1559 silc_server_packet_parse, server);
1562 /* Parses whole packet, received earlier. */
1564 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1566 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1567 SilcServer server = (SilcServer)parse_ctx->context;
1568 SilcSocketConnection sock = parse_ctx->sock;
1569 SilcPacketContext *packet = parse_ctx->packet;
1570 SilcIDListData idata = (SilcIDListData)sock->user_data;
1573 SILC_LOG_DEBUG(("Start"));
1575 /* Parse the packet */
1576 if (parse_ctx->normal)
1577 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1579 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1581 /* If entry is disabled ignore what we got. */
1582 if (ret != SILC_PACKET_RESUME_ROUTER &&
1583 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1584 SILC_LOG_DEBUG(("Connection is disabled"));
1588 if (ret == SILC_PACKET_NONE)
1591 /* Check that the the current client ID is same as in the client's packet. */
1592 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1593 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1594 if (client && client->id) {
1595 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1596 packet->src_id_type);
1597 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1605 if (server->server_type == SILC_ROUTER) {
1606 /* Route the packet if it is not destined to us. Other ID types but
1607 server are handled separately after processing them. */
1608 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1609 packet->dst_id_type == SILC_ID_SERVER &&
1610 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1611 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1613 /* Route the packet to fastest route for the destination ID */
1614 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1615 packet->dst_id_type);
1618 silc_server_packet_route(server,
1619 silc_server_route_get(server, id,
1620 packet->dst_id_type),
1627 /* Parse the incoming packet type */
1628 silc_server_packet_parse_type(server, sock, packet);
1630 if (server->server_type == SILC_ROUTER) {
1631 /* Broadcast packet if it is marked as broadcast packet and it is
1632 originated from router and we are router. */
1633 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1634 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1635 !server->standalone) {
1636 /* Broadcast to our primary route */
1637 silc_server_packet_broadcast(server, server->router->connection, packet);
1639 /* If we have backup routers then we need to feed all broadcast
1640 data to those servers. */
1641 silc_server_backup_broadcast(server, sock, packet);
1646 silc_packet_context_free(packet);
1647 silc_free(parse_ctx);
1650 /* Parser callback called by silc_packet_receive_process. This merely
1651 registers timeout that will handle the actual parsing when appropriate. */
1653 void silc_server_packet_parse(SilcPacketParserContext *parser_context,
1656 SilcServer server = (SilcServer)context;
1657 SilcSocketConnection sock = parser_context->sock;
1658 SilcIDListData idata = (SilcIDListData)sock->user_data;
1661 idata->psn_receive = parser_context->packet->sequence + 1;
1663 switch (sock->type) {
1664 case SILC_SOCKET_TYPE_UNKNOWN:
1665 case SILC_SOCKET_TYPE_CLIENT:
1666 /* Parse the packet with timeout */
1667 silc_schedule_task_add(server->schedule, sock->sock,
1668 silc_server_packet_parse_real,
1669 (void *)parser_context, 0, 100000,
1671 SILC_TASK_PRI_NORMAL);
1673 case SILC_SOCKET_TYPE_SERVER:
1674 case SILC_SOCKET_TYPE_ROUTER:
1675 /* Packets from servers are parsed as soon as possible */
1676 silc_schedule_task_add(server->schedule, sock->sock,
1677 silc_server_packet_parse_real,
1678 (void *)parser_context, 0, 1,
1680 SILC_TASK_PRI_NORMAL);
1687 /* Parses the packet type and calls what ever routines the packet type
1688 requires. This is done for all incoming packets. */
1690 void silc_server_packet_parse_type(SilcServer server,
1691 SilcSocketConnection sock,
1692 SilcPacketContext *packet)
1694 SilcPacketType type = packet->type;
1695 SilcIDListData idata = (SilcIDListData)sock->user_data;
1697 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1699 /* Parse the packet type */
1701 case SILC_PACKET_DISCONNECT:
1702 SILC_LOG_DEBUG(("Disconnect packet"));
1703 if (packet->flags & SILC_PACKET_FLAG_LIST)
1707 case SILC_PACKET_SUCCESS:
1709 * Success received for something. For now we can have only
1710 * one protocol for connection executing at once hence this
1711 * success message is for whatever protocol is executing currently.
1713 SILC_LOG_DEBUG(("Success packet"));
1714 if (packet->flags & SILC_PACKET_FLAG_LIST)
1717 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1720 case SILC_PACKET_FAILURE:
1722 * Failure received for something. For now we can have only
1723 * one protocol for connection executing at once hence this
1724 * failure message is for whatever protocol is executing currently.
1726 SILC_LOG_DEBUG(("Failure packet"));
1727 if (packet->flags & SILC_PACKET_FLAG_LIST)
1729 if (sock->protocol) {
1730 SilcServerFailureContext f;
1731 f = silc_calloc(1, sizeof(*f));
1735 /* We will wait 5 seconds to process this failure packet */
1736 silc_schedule_task_add(server->schedule, sock->sock,
1737 silc_server_failure_callback, (void *)f, 5, 0,
1738 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1742 case SILC_PACKET_REJECT:
1743 SILC_LOG_DEBUG(("Reject packet"));
1744 if (packet->flags & SILC_PACKET_FLAG_LIST)
1749 case SILC_PACKET_NOTIFY:
1751 * Received notify packet. Server can receive notify packets from
1752 * router. Server then relays the notify messages to clients if needed.
1754 SILC_LOG_DEBUG(("Notify packet"));
1755 if (packet->flags & SILC_PACKET_FLAG_LIST)
1756 silc_server_notify_list(server, sock, packet);
1758 silc_server_notify(server, sock, packet);
1764 case SILC_PACKET_CHANNEL_MESSAGE:
1766 * Received channel message. Channel messages are special packets
1767 * (although probably most common ones) thus they are handled
1770 SILC_LOG_DEBUG(("Channel Message packet"));
1771 if (packet->flags & SILC_PACKET_FLAG_LIST)
1773 idata->last_receive = time(NULL);
1774 silc_server_channel_message(server, sock, packet);
1777 case SILC_PACKET_CHANNEL_KEY:
1779 * Received key for channel. As channels are created by the router
1780 * the keys are as well. We will distribute the key to all of our
1781 * locally connected clients on the particular channel. Router
1782 * never receives this channel and thus is ignored.
1784 SILC_LOG_DEBUG(("Channel Key packet"));
1785 if (packet->flags & SILC_PACKET_FLAG_LIST)
1787 silc_server_channel_key(server, sock, packet);
1793 case SILC_PACKET_COMMAND:
1795 * Recived command. Processes the command request and allocates the
1796 * command context and calls the command.
1798 SILC_LOG_DEBUG(("Command packet"));
1799 if (packet->flags & SILC_PACKET_FLAG_LIST)
1801 silc_server_command_process(server, sock, packet);
1804 case SILC_PACKET_COMMAND_REPLY:
1806 * Received command reply packet. Received command reply to command. It
1807 * may be reply to command sent by us or reply to command sent by client
1808 * that we've routed further.
1810 SILC_LOG_DEBUG(("Command Reply packet"));
1811 if (packet->flags & SILC_PACKET_FLAG_LIST)
1813 silc_server_command_reply(server, sock, packet);
1817 * Private Message packets
1819 case SILC_PACKET_PRIVATE_MESSAGE:
1821 * Received private message packet. The packet is coming from either
1824 SILC_LOG_DEBUG(("Private Message packet"));
1825 if (packet->flags & SILC_PACKET_FLAG_LIST)
1827 idata->last_receive = time(NULL);
1828 silc_server_private_message(server, sock, packet);
1831 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1833 * Private message key packet.
1835 if (packet->flags & SILC_PACKET_FLAG_LIST)
1837 silc_server_private_message_key(server, sock, packet);
1841 * Key Exchange protocol packets
1843 case SILC_PACKET_KEY_EXCHANGE:
1844 SILC_LOG_DEBUG(("KE packet"));
1845 if (packet->flags & SILC_PACKET_FLAG_LIST)
1848 if (sock->protocol && sock->protocol->protocol &&
1849 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1851 SilcServerKEInternalContext *proto_ctx =
1852 (SilcServerKEInternalContext *)sock->protocol->context;
1854 proto_ctx->packet = silc_packet_context_dup(packet);
1856 /* Let the protocol handle the packet */
1857 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1859 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1860 "protocol active, packet dropped."));
1864 case SILC_PACKET_KEY_EXCHANGE_1:
1865 SILC_LOG_DEBUG(("KE 1 packet"));
1866 if (packet->flags & SILC_PACKET_FLAG_LIST)
1869 if (sock->protocol && sock->protocol->protocol &&
1870 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1871 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1873 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1874 SilcServerRekeyInternalContext *proto_ctx =
1875 (SilcServerRekeyInternalContext *)sock->protocol->context;
1877 if (proto_ctx->packet)
1878 silc_packet_context_free(proto_ctx->packet);
1880 proto_ctx->packet = silc_packet_context_dup(packet);
1882 /* Let the protocol handle the packet */
1883 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1885 SilcServerKEInternalContext *proto_ctx =
1886 (SilcServerKEInternalContext *)sock->protocol->context;
1888 if (proto_ctx->packet)
1889 silc_packet_context_free(proto_ctx->packet);
1891 proto_ctx->packet = silc_packet_context_dup(packet);
1892 proto_ctx->dest_id_type = packet->src_id_type;
1893 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1894 packet->src_id_type);
1895 if (!proto_ctx->dest_id)
1898 /* Let the protocol handle the packet */
1899 silc_protocol_execute(sock->protocol, server->schedule,
1903 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1904 "protocol active, packet dropped."));
1908 case SILC_PACKET_KEY_EXCHANGE_2:
1909 SILC_LOG_DEBUG(("KE 2 packet"));
1910 if (packet->flags & SILC_PACKET_FLAG_LIST)
1913 if (sock->protocol && sock->protocol->protocol &&
1914 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1915 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1917 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1918 SilcServerRekeyInternalContext *proto_ctx =
1919 (SilcServerRekeyInternalContext *)sock->protocol->context;
1921 if (proto_ctx->packet)
1922 silc_packet_context_free(proto_ctx->packet);
1924 proto_ctx->packet = silc_packet_context_dup(packet);
1926 /* Let the protocol handle the packet */
1927 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1929 SilcServerKEInternalContext *proto_ctx =
1930 (SilcServerKEInternalContext *)sock->protocol->context;
1932 if (proto_ctx->packet)
1933 silc_packet_context_free(proto_ctx->packet);
1935 proto_ctx->packet = silc_packet_context_dup(packet);
1936 proto_ctx->dest_id_type = packet->src_id_type;
1937 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1938 packet->src_id_type);
1939 if (!proto_ctx->dest_id)
1942 /* Let the protocol handle the packet */
1943 silc_protocol_execute(sock->protocol, server->schedule,
1947 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1948 "protocol active, packet dropped."));
1952 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1954 * Connection authentication request packet. When we receive this packet
1955 * we will send to the other end information about our mandatory
1956 * authentication method for the connection. This packet maybe received
1959 SILC_LOG_DEBUG(("Connection authentication request packet"));
1960 if (packet->flags & SILC_PACKET_FLAG_LIST)
1962 silc_server_connection_auth_request(server, sock, packet);
1966 * Connection Authentication protocol packets
1968 case SILC_PACKET_CONNECTION_AUTH:
1969 /* Start of the authentication protocol. We receive here the
1970 authentication data and will verify it. */
1971 SILC_LOG_DEBUG(("Connection auth packet"));
1972 if (packet->flags & SILC_PACKET_FLAG_LIST)
1975 if (sock->protocol && sock->protocol->protocol->type
1976 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1978 SilcServerConnAuthInternalContext *proto_ctx =
1979 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1981 proto_ctx->packet = silc_packet_context_dup(packet);
1983 /* Let the protocol handle the packet */
1984 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1986 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1987 "protocol active, packet dropped."));
1991 case SILC_PACKET_NEW_ID:
1993 * Received New ID packet. This includes some new ID that has been
1994 * created. It may be for client, server or channel. This is the way
1995 * to distribute information about new registered entities in the
1998 SILC_LOG_DEBUG(("New ID packet"));
1999 if (packet->flags & SILC_PACKET_FLAG_LIST)
2000 silc_server_new_id_list(server, sock, packet);
2002 silc_server_new_id(server, sock, packet);
2005 case SILC_PACKET_NEW_CLIENT:
2007 * Received new client packet. This includes client information that
2008 * we will use to create initial client ID. After creating new
2009 * ID we will send it to the client.
2011 SILC_LOG_DEBUG(("New Client packet"));
2012 if (packet->flags & SILC_PACKET_FLAG_LIST)
2014 silc_server_new_client(server, sock, packet);
2017 case SILC_PACKET_NEW_SERVER:
2019 * Received new server packet. This includes Server ID and some other
2020 * information that we may save. This is received after server has
2023 SILC_LOG_DEBUG(("New Server packet"));
2024 if (packet->flags & SILC_PACKET_FLAG_LIST)
2026 silc_server_new_server(server, sock, packet);
2029 case SILC_PACKET_NEW_CHANNEL:
2031 * Received new channel packet. Information about new channel in the
2032 * network are distributed using this packet.
2034 SILC_LOG_DEBUG(("New Channel packet"));
2035 if (packet->flags & SILC_PACKET_FLAG_LIST)
2036 silc_server_new_channel_list(server, sock, packet);
2038 silc_server_new_channel(server, sock, packet);
2041 case SILC_PACKET_HEARTBEAT:
2043 * Received heartbeat.
2045 SILC_LOG_DEBUG(("Heartbeat packet"));
2046 if (packet->flags & SILC_PACKET_FLAG_LIST)
2050 case SILC_PACKET_KEY_AGREEMENT:
2052 * Received heartbeat.
2054 SILC_LOG_DEBUG(("Key agreement packet"));
2055 if (packet->flags & SILC_PACKET_FLAG_LIST)
2057 silc_server_key_agreement(server, sock, packet);
2060 case SILC_PACKET_REKEY:
2062 * Received re-key packet. The sender wants to regenerate the session
2065 SILC_LOG_DEBUG(("Re-key packet"));
2066 if (packet->flags & SILC_PACKET_FLAG_LIST)
2068 silc_server_rekey(server, sock, packet);
2071 case SILC_PACKET_REKEY_DONE:
2073 * The re-key is done.
2075 SILC_LOG_DEBUG(("Re-key done packet"));
2076 if (packet->flags & SILC_PACKET_FLAG_LIST)
2079 if (sock->protocol && sock->protocol->protocol &&
2080 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2082 SilcServerRekeyInternalContext *proto_ctx =
2083 (SilcServerRekeyInternalContext *)sock->protocol->context;
2085 if (proto_ctx->packet)
2086 silc_packet_context_free(proto_ctx->packet);
2088 proto_ctx->packet = silc_packet_context_dup(packet);
2090 /* Let the protocol handle the packet */
2091 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2093 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2094 "protocol active, packet dropped."));
2098 case SILC_PACKET_FTP:
2102 case SILC_PACKET_RESUME_ROUTER:
2103 /* Resume router packet received. This packet is received for backup
2104 router resuming protocol. */
2105 SILC_LOG_DEBUG(("Resume router packet"));
2106 if (packet->flags & SILC_PACKET_FLAG_LIST)
2108 silc_server_backup_resume_router(server, sock, packet);
2112 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2118 /* Creates connection to a remote router. */
2120 void silc_server_create_connection(SilcServer server,
2121 char *remote_host, uint32 port)
2123 SilcServerConnection sconn;
2125 /* Allocate connection object for hold connection specific stuff. */
2126 sconn = silc_calloc(1, sizeof(*sconn));
2127 sconn->server = server;
2128 sconn->remote_host = strdup(remote_host);
2129 sconn->remote_port = port;
2131 silc_schedule_task_add(server->schedule, 0,
2132 silc_server_connect_router,
2133 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2134 SILC_TASK_PRI_NORMAL);
2137 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2139 silc_socket_free((SilcSocketConnection)context);
2142 /* Closes connection to socket connection */
2144 void silc_server_close_connection(SilcServer server,
2145 SilcSocketConnection sock)
2147 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2149 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2150 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2151 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2154 /* We won't listen for this connection anymore */
2155 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2157 /* Unregister all tasks */
2158 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2160 /* Close the actual connection */
2161 silc_net_close_connection(sock->sock);
2162 server->sockets[sock->sock] = NULL;
2164 /* If sock->user_data is NULL then we'll check for active protocols
2165 here since the silc_server_free_sock_user_data has not been called
2166 for this connection. */
2167 if (!sock->user_data) {
2168 /* If any protocol is active cancel its execution. It will call
2169 the final callback which will finalize the disconnection. */
2170 if (sock->protocol) {
2171 silc_protocol_cancel(sock->protocol, server->schedule);
2172 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2173 silc_protocol_execute_final(sock->protocol, server->schedule);
2174 sock->protocol = NULL;
2179 silc_schedule_task_add(server->schedule, 0,
2180 silc_server_close_connection_final,
2181 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2182 SILC_TASK_PRI_NORMAL);
2185 /* Sends disconnect message to remote connection and disconnects the
2188 void silc_server_disconnect_remote(SilcServer server,
2189 SilcSocketConnection sock,
2190 const char *fmt, ...)
2193 unsigned char buf[4096];
2198 memset(buf, 0, sizeof(buf));
2200 vsprintf(buf, fmt, ap);
2203 SILC_LOG_DEBUG(("Disconnecting remote host"));
2205 /* Notify remote end that the conversation is over. The notify message
2206 is tried to be sent immediately. */
2207 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2208 buf, strlen(buf), TRUE);
2210 /* Mark the connection to be disconnected */
2211 SILC_SET_DISCONNECTED(sock);
2212 silc_server_close_connection(server, sock);
2217 SilcClientEntry client;
2218 } *FreeClientInternal;
2220 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2222 FreeClientInternal i = (FreeClientInternal)context;
2224 silc_idlist_del_data(i->client);
2225 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2229 /* Frees client data and notifies about client's signoff. */
2231 void silc_server_free_client_data(SilcServer server,
2232 SilcSocketConnection sock,
2233 SilcClientEntry client,
2237 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2239 /* If there is pending outgoing data for the client then purge it
2240 to the network before removing the client entry. */
2241 silc_server_packet_queue_purge(server, sock);
2246 /* Send SIGNOFF notify to routers. */
2247 if (notify && !server->standalone && server->router)
2248 silc_server_send_notify_signoff(server, server->router->connection,
2249 server->server_type == SILC_SERVER ?
2250 FALSE : TRUE, client->id, signoff);
2252 /* Remove client from all channels */
2254 silc_server_remove_from_channels(server, NULL, client,
2255 TRUE, signoff, TRUE);
2257 silc_server_remove_from_channels(server, NULL, client,
2258 FALSE, NULL, FALSE);
2260 /* We will not delete the client entry right away. We will take it
2261 into history (for WHOWAS command) for 5 minutes */
2264 silc_schedule_task_add(server->schedule, 0,
2265 silc_server_free_client_data_timeout,
2267 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2268 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2269 client->router = NULL;
2270 client->connection = NULL;
2272 /* Free the client entry and everything in it */
2273 server->stat.my_clients--;
2274 server->stat.clients--;
2275 if (server->server_type == SILC_ROUTER)
2276 server->stat.cell_clients--;
2279 /* Frees user_data pointer from socket connection object. This also sends
2280 appropriate notify packets to the network to inform about leaving
2283 void silc_server_free_sock_user_data(SilcServer server,
2284 SilcSocketConnection sock)
2286 SILC_LOG_DEBUG(("Start"));
2288 switch (sock->type) {
2289 case SILC_SOCKET_TYPE_CLIENT:
2291 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2292 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2295 case SILC_SOCKET_TYPE_SERVER:
2296 case SILC_SOCKET_TYPE_ROUTER:
2298 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2299 SilcServerEntry backup_router = NULL;
2302 backup_router = silc_server_backup_get(server, user_data->id);
2304 /* If this was our primary router connection then we're lost to
2305 the outside world. */
2306 if (server->router == user_data) {
2307 /* Check whether we have a backup router connection */
2308 if (!backup_router || backup_router == user_data) {
2309 silc_schedule_task_add(server->schedule, 0,
2310 silc_server_connect_to_router,
2313 SILC_TASK_PRI_NORMAL);
2315 server->id_entry->router = NULL;
2316 server->router = NULL;
2317 server->standalone = TRUE;
2318 backup_router = NULL;
2320 SILC_LOG_INFO(("New primary router is backup router %s",
2321 backup_router->server_name));
2322 SILC_LOG_DEBUG(("New primary router is backup router %s",
2323 backup_router->server_name));
2324 server->id_entry->router = backup_router;
2325 server->router = backup_router;
2326 server->router_connect = time(0);
2327 server->backup_primary = TRUE;
2328 if (server->server_type == SILC_BACKUP_ROUTER) {
2329 server->server_type = SILC_ROUTER;
2331 /* We'll need to constantly try to reconnect to the primary
2332 router so that we'll see when it comes back online. */
2333 silc_server_backup_reconnect(server, sock->ip, sock->port,
2334 silc_server_backup_connected,
2338 /* Mark this connection as replaced */
2339 silc_server_backup_replaced_add(server, user_data->id,
2342 } else if (backup_router) {
2343 SILC_LOG_INFO(("Enabling the use of backup router %s",
2344 backup_router->server_name));
2345 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2346 backup_router->server_name));
2348 /* Mark this connection as replaced */
2349 silc_server_backup_replaced_add(server, user_data->id,
2353 if (!backup_router) {
2354 /* Free all client entries that this server owns as they will
2355 become invalid now as well. */
2357 silc_server_remove_clients_by_server(server, user_data, TRUE);
2359 /* Update the client entries of this server to the new backup
2360 router. This also removes the clients that *really* was owned
2361 by the primary router and went down with the router. */
2362 silc_server_update_clients_by_server(server, user_data, backup_router,
2364 silc_server_update_servers_by_server(server, user_data, backup_router);
2367 /* Free the server entry */
2368 silc_server_backup_del(server, user_data);
2369 silc_server_backup_replaced_del(server, user_data);
2370 silc_idlist_del_data(user_data);
2371 if (!silc_idlist_del_server(server->local_list, user_data))
2372 silc_idlist_del_server(server->global_list, user_data);
2373 server->stat.my_servers--;
2374 server->stat.servers--;
2375 if (server->server_type == SILC_ROUTER)
2376 server->stat.cell_servers--;
2378 if (backup_router) {
2379 /* Announce all of our stuff that was created about 5 minutes ago.
2380 The backup router knows all the other stuff already. */
2381 if (server->server_type == SILC_ROUTER)
2382 silc_server_announce_servers(server, FALSE, time(0) - 300,
2383 backup_router->connection);
2385 /* Announce our clients and channels to the router */
2386 silc_server_announce_clients(server, time(0) - 300,
2387 backup_router->connection);
2388 silc_server_announce_channels(server, time(0) - 300,
2389 backup_router->connection);
2395 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2397 silc_idlist_del_data(user_data);
2398 silc_free(user_data);
2403 /* If any protocol is active cancel its execution */
2404 if (sock->protocol) {
2405 silc_protocol_cancel(sock->protocol, server->schedule);
2406 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2407 silc_protocol_execute_final(sock->protocol, server->schedule);
2408 sock->protocol = NULL;
2411 sock->user_data = NULL;
2414 /* Removes client from all channels it has joined. This is used when client
2415 connection is disconnected. If the client on a channel is last, the
2416 channel is removed as well. This sends the SIGNOFF notify types. */
2418 void silc_server_remove_from_channels(SilcServer server,
2419 SilcSocketConnection sock,
2420 SilcClientEntry client,
2422 char *signoff_message,
2425 SilcChannelEntry channel;
2426 SilcChannelClientEntry chl;
2427 SilcHashTableList htl;
2430 SILC_LOG_DEBUG(("Start"));
2432 if (!client || !client->id)
2435 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2437 /* Remove the client from all channels. The client is removed from
2438 the channels' user list. */
2439 silc_hash_table_list(client->channels, &htl);
2440 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2441 channel = chl->channel;
2443 /* Remove channel from client's channel list */
2444 silc_hash_table_del(client->channels, channel);
2446 /* Remove channel if there is no users anymore */
2447 if (server->server_type == SILC_ROUTER &&
2448 silc_hash_table_count(channel->user_list) < 2) {
2450 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2451 if (silc_idlist_del_channel(server->local_list, channel))
2452 server->stat.my_channels--;
2453 else if (silc_idlist_del_channel(server->global_list, channel))
2454 server->stat.my_channels--;
2458 /* Remove client from channel's client list */
2459 silc_hash_table_del(channel->user_list, chl->client);
2461 /* If there is no global users on the channel anymore mark the channel
2462 as local channel. Do not check if the removed client is local client. */
2463 if (server->server_type != SILC_ROUTER && channel->global_users &&
2464 chl->client->router && !silc_server_channel_has_global(channel))
2465 channel->global_users = FALSE;
2468 server->stat.my_chanclients--;
2470 /* If there is not at least one local user on the channel then we don't
2471 need the channel entry anymore, we can remove it safely. */
2472 if (server->server_type != SILC_ROUTER &&
2473 !silc_server_channel_has_local(channel)) {
2474 /* Notify about leaving client if this channel has global users. */
2475 if (notify && channel->global_users)
2476 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2477 SILC_NOTIFY_TYPE_SIGNOFF,
2478 signoff_message ? 2 : 1,
2479 clidp->data, clidp->len,
2480 signoff_message, signoff_message ?
2481 strlen(signoff_message) : 0);
2484 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2486 if (channel->founder_key) {
2487 /* The founder auth data exists, do not remove the channel entry */
2488 SilcChannelClientEntry chl2;
2489 SilcHashTableList htl2;
2493 silc_hash_table_list(channel->user_list, &htl2);
2494 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2495 silc_hash_table_del(chl2->client->channels, channel);
2496 silc_hash_table_del(channel->user_list, chl2->client);
2502 /* Remove the channel entry */
2503 if (silc_idlist_del_channel(server->local_list, channel))
2504 server->stat.my_channels--;
2505 else if (silc_idlist_del_channel(server->global_list, channel))
2506 server->stat.my_channels--;
2510 /* Send notify to channel about client leaving SILC and thus
2511 the entire channel. */
2513 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2514 SILC_NOTIFY_TYPE_SIGNOFF,
2515 signoff_message ? 2 : 1,
2516 clidp->data, clidp->len,
2517 signoff_message, signoff_message ?
2518 strlen(signoff_message) : 0);
2520 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2521 /* Re-generate channel key */
2522 if (!silc_server_create_channel_key(server, channel, 0))
2525 /* Send the channel key to the channel. The key of course is not sent
2526 to the client who was removed from the channel. */
2527 silc_server_send_channel_key(server, client->connection, channel,
2528 server->server_type == SILC_ROUTER ?
2529 FALSE : !server->standalone);
2533 silc_buffer_free(clidp);
2536 /* Removes client from one channel. This is used for example when client
2537 calls LEAVE command to remove itself from the channel. Returns TRUE
2538 if channel still exists and FALSE if the channel is removed when
2539 last client leaves the channel. If `notify' is FALSE notify messages
2542 int silc_server_remove_from_one_channel(SilcServer server,
2543 SilcSocketConnection sock,
2544 SilcChannelEntry channel,
2545 SilcClientEntry client,
2548 SilcChannelClientEntry chl;
2551 SILC_LOG_DEBUG(("Start"));
2553 /* Get the entry to the channel, if this client is not on the channel
2555 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2558 /* Remove the client from the channel. The client is removed from
2559 the channel's user list. */
2561 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2563 /* Remove channel from client's channel list */
2564 silc_hash_table_del(client->channels, chl->channel);
2566 /* Remove channel if there is no users anymore */
2567 if (server->server_type == SILC_ROUTER &&
2568 silc_hash_table_count(channel->user_list) < 2) {
2570 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2571 if (silc_idlist_del_channel(server->local_list, channel))
2572 server->stat.my_channels--;
2573 else if (silc_idlist_del_channel(server->global_list, channel))
2574 server->stat.my_channels--;
2575 silc_buffer_free(clidp);
2579 /* Remove client from channel's client list */
2580 silc_hash_table_del(channel->user_list, chl->client);
2582 /* If there is no global users on the channel anymore mark the channel
2583 as local channel. Do not check if the client is local client. */
2584 if (server->server_type != SILC_ROUTER && channel->global_users &&
2585 chl->client->router && !silc_server_channel_has_global(channel))
2586 channel->global_users = FALSE;
2589 server->stat.my_chanclients--;
2591 /* If there is not at least one local user on the channel then we don't
2592 need the channel entry anymore, we can remove it safely. */
2593 if (server->server_type != SILC_ROUTER &&
2594 !silc_server_channel_has_local(channel)) {
2595 /* Notify about leaving client if this channel has global users. */
2596 if (notify && channel->global_users)
2597 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2598 SILC_NOTIFY_TYPE_LEAVE, 1,
2599 clidp->data, clidp->len);
2601 silc_buffer_free(clidp);
2604 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2606 if (channel->founder_key) {
2607 /* The founder auth data exists, do not remove the channel entry */
2608 SilcChannelClientEntry chl2;
2609 SilcHashTableList htl2;
2613 silc_hash_table_list(channel->user_list, &htl2);
2614 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2615 silc_hash_table_del(chl2->client->channels, channel);
2616 silc_hash_table_del(channel->user_list, chl2->client);
2622 /* Remove the channel entry */
2623 if (silc_idlist_del_channel(server->local_list, channel))
2624 server->stat.my_channels--;
2625 else if (silc_idlist_del_channel(server->global_list, channel))
2626 server->stat.my_channels--;
2630 /* Send notify to channel about client leaving the channel */
2632 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2633 SILC_NOTIFY_TYPE_LEAVE, 1,
2634 clidp->data, clidp->len);
2636 silc_buffer_free(clidp);
2640 /* Timeout callback. This is called if connection is idle or for some
2641 other reason is not responding within some period of time. This
2642 disconnects the remote end. */
2644 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2646 SilcServer server = (SilcServer)context;
2647 SilcSocketConnection sock = server->sockets[fd];
2649 SILC_LOG_DEBUG(("Start"));
2654 /* If we have protocol active we must assure that we call the protocol's
2655 final callback so that all the memory is freed. */
2656 if (sock->protocol) {
2657 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2658 silc_protocol_execute_final(sock->protocol, server->schedule);
2662 if (sock->user_data)
2663 silc_server_free_sock_user_data(server, sock);
2665 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2666 "Connection timeout");
2669 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2670 function may be used only by router. In real SILC network all channels
2671 are created by routers thus this function is never used by normal
2674 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2675 SilcServerID *router_id,
2681 SilcChannelID *channel_id;
2682 SilcChannelEntry entry;
2686 SILC_LOG_DEBUG(("Creating new channel"));
2689 cipher = SILC_DEFAULT_CIPHER;
2691 hmac = SILC_DEFAULT_HMAC;
2693 /* Allocate cipher */
2694 if (!silc_cipher_alloc(cipher, &key))
2698 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2699 silc_cipher_free(key);
2703 channel_name = strdup(channel_name);
2705 /* Create the channel */
2706 if (!silc_id_create_channel_id(server, router_id, server->rng,
2708 silc_free(channel_name);
2709 silc_cipher_free(key);
2710 silc_hmac_free(newhmac);
2713 entry = silc_idlist_add_channel(server->local_list, channel_name,
2714 SILC_CHANNEL_MODE_NONE, channel_id,
2715 NULL, key, newhmac);
2717 silc_free(channel_name);
2718 silc_cipher_free(key);
2719 silc_hmac_free(newhmac);
2723 entry->cipher = strdup(cipher);
2724 entry->hmac_name = strdup(hmac);
2726 /* Now create the actual key material */
2727 if (!silc_server_create_channel_key(server, entry,
2728 silc_cipher_get_key_len(key) / 8)) {
2729 silc_free(channel_name);
2730 silc_cipher_free(key);
2731 silc_hmac_free(newhmac);
2732 silc_free(entry->cipher);
2733 silc_free(entry->hmac_name);
2737 /* Notify other routers about the new channel. We send the packet
2738 to our primary route. */
2739 if (broadcast && server->standalone == FALSE)
2740 silc_server_send_new_channel(server, server->router->connection, TRUE,
2741 channel_name, entry->id,
2742 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2745 server->stat.my_channels++;
2750 /* Same as above but creates the channel with Channel ID `channel_id. */
2753 silc_server_create_new_channel_with_id(SilcServer server,
2757 SilcChannelID *channel_id,
2760 SilcChannelEntry entry;
2764 SILC_LOG_DEBUG(("Creating new channel"));
2767 cipher = SILC_DEFAULT_CIPHER;
2769 hmac = SILC_DEFAULT_HMAC;
2771 /* Allocate cipher */
2772 if (!silc_cipher_alloc(cipher, &key))
2776 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2777 silc_cipher_free(key);
2781 channel_name = strdup(channel_name);
2783 /* Create the channel */
2784 entry = silc_idlist_add_channel(server->local_list, channel_name,
2785 SILC_CHANNEL_MODE_NONE, channel_id,
2786 NULL, key, newhmac);
2788 silc_free(channel_name);
2792 /* Now create the actual key material */
2793 if (!silc_server_create_channel_key(server, entry,
2794 silc_cipher_get_key_len(key) / 8)) {
2795 silc_free(channel_name);
2799 /* Notify other routers about the new channel. We send the packet
2800 to our primary route. */
2801 if (broadcast && server->standalone == FALSE)
2802 silc_server_send_new_channel(server, server->router->connection, TRUE,
2803 channel_name, entry->id,
2804 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2807 server->stat.my_channels++;
2812 /* Channel's key re-key timeout callback. */
2814 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2816 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2817 SilcServer server = (SilcServer)rekey->context;
2821 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2824 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2827 /* Generates new channel key. This is used to create the initial channel key
2828 but also to re-generate new key for channel. If `key_len' is provided
2829 it is the bytes of the key length. */
2831 bool silc_server_create_channel_key(SilcServer server,
2832 SilcChannelEntry channel,
2836 unsigned char channel_key[32], hash[32];
2839 SILC_LOG_DEBUG(("Generating channel key"));
2841 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2842 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2846 if (!channel->channel_key)
2847 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2852 else if (channel->key_len)
2853 len = channel->key_len / 8;
2855 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2857 /* Create channel key */
2858 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2861 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2863 /* Remove old key if exists */
2865 memset(channel->key, 0, channel->key_len / 8);
2866 silc_free(channel->key);
2870 channel->key_len = len * 8;
2871 channel->key = silc_calloc(len, sizeof(*channel->key));
2872 memcpy(channel->key, channel_key, len);
2873 memset(channel_key, 0, sizeof(channel_key));
2875 /* Generate HMAC key from the channel key data and set it */
2877 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2878 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2879 silc_hmac_set_key(channel->hmac, hash,
2880 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2881 memset(hash, 0, sizeof(hash));
2883 if (server->server_type == SILC_ROUTER) {
2884 if (!channel->rekey)
2885 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2886 channel->rekey->context = (void *)server;
2887 channel->rekey->channel = channel;
2888 channel->rekey->key_len = key_len;
2889 if (channel->rekey->task)
2890 silc_schedule_task_del(server->schedule, channel->rekey->task);
2892 channel->rekey->task =
2893 silc_schedule_task_add(server->schedule, 0,
2894 silc_server_channel_key_rekey,
2895 (void *)channel->rekey, 3600, 0,
2897 SILC_TASK_PRI_NORMAL);
2903 /* Saves the channel key found in the encoded `key_payload' buffer. This
2904 function is used when we receive Channel Key Payload and also when we're
2905 processing JOIN command reply. Returns entry to the channel. */
2907 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2908 SilcBuffer key_payload,
2909 SilcChannelEntry channel)
2911 SilcChannelKeyPayload payload = NULL;
2912 SilcChannelID *id = NULL;
2913 unsigned char *tmp, hash[32];
2917 SILC_LOG_DEBUG(("Start"));
2919 /* Decode channel key payload */
2920 payload = silc_channel_key_payload_parse(key_payload);
2922 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2927 /* Get the channel entry */
2930 /* Get channel ID */
2931 tmp = silc_channel_key_get_id(payload, &tmp_len);
2932 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2938 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2940 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2942 SILC_LOG_ERROR(("Received key for non-existent channel"));
2948 tmp = silc_channel_key_get_key(payload, &tmp_len);
2954 cipher = silc_channel_key_get_cipher(payload, NULL);
2960 /* Remove old key if exists */
2962 memset(channel->key, 0, channel->key_len / 8);
2963 silc_free(channel->key);
2964 silc_cipher_free(channel->channel_key);
2967 /* Create new cipher */
2968 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2973 if (channel->cipher)
2974 silc_free(channel->cipher);
2975 channel->cipher = strdup(cipher);
2978 channel->key_len = tmp_len * 8;
2979 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2980 memcpy(channel->key, tmp, tmp_len);
2981 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2983 /* Generate HMAC key from the channel key data and set it */
2985 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2986 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
2987 silc_hmac_set_key(channel->hmac, hash,
2988 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2990 memset(hash, 0, sizeof(hash));
2991 memset(tmp, 0, tmp_len);
2993 if (server->server_type == SILC_ROUTER) {
2994 if (!channel->rekey)
2995 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2996 channel->rekey->context = (void *)server;
2997 channel->rekey->channel = channel;
2998 if (channel->rekey->task)
2999 silc_schedule_task_del(server->schedule, channel->rekey->task);
3001 channel->rekey->task =
3002 silc_schedule_task_add(server->schedule, 0,
3003 silc_server_channel_key_rekey,
3004 (void *)channel->rekey, 3600, 0,
3006 SILC_TASK_PRI_NORMAL);
3012 silc_channel_key_payload_free(payload);
3017 /* Heartbeat callback. This function is set as argument for the
3018 silc_socket_set_heartbeat function. The library will call this function
3019 at the set time interval. */
3021 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3024 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3026 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3029 /* Send the heartbeat */
3030 silc_server_send_heartbeat(hb->server, sock);
3033 /* Returns assembled of all servers in the given ID list. The packet's
3034 form is dictated by the New ID payload. */
3036 static void silc_server_announce_get_servers(SilcServer server,
3037 SilcServerEntry remote,
3039 SilcBuffer *servers,
3040 unsigned long creation_time)
3042 SilcIDCacheList list;
3043 SilcIDCacheEntry id_cache;
3044 SilcServerEntry entry;
3047 /* Go through all clients in the list */
3048 if (silc_idcache_get_all(id_list->servers, &list)) {
3049 if (silc_idcache_list_first(list, &id_cache)) {
3051 entry = (SilcServerEntry)id_cache->context;
3053 /* Do not announce the one we've sending our announcements and
3054 do not announce ourself. Also check the creation time if it's
3056 if ((entry == remote) || (entry == server->id_entry) ||
3057 (creation_time && entry->data.created < creation_time)) {
3058 if (!silc_idcache_list_next(list, &id_cache))
3063 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3065 *servers = silc_buffer_realloc(*servers,
3067 (*servers)->truelen + idp->len :
3069 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3070 silc_buffer_put(*servers, idp->data, idp->len);
3071 silc_buffer_pull(*servers, idp->len);
3072 silc_buffer_free(idp);
3074 if (!silc_idcache_list_next(list, &id_cache))
3079 silc_idcache_list_free(list);
3083 /* This function is used by router to announce existing servers to our
3084 primary router when we've connected to it. If `creation_time' is non-zero
3085 then only the servers that has been created after the `creation_time'
3086 will be announced. */
3088 void silc_server_announce_servers(SilcServer server, bool global,
3089 unsigned long creation_time,
3090 SilcSocketConnection remote)
3092 SilcBuffer servers = NULL;
3094 SILC_LOG_DEBUG(("Announcing servers"));
3096 /* Get servers in local list */
3097 silc_server_announce_get_servers(server, remote->user_data,
3098 server->local_list, &servers,
3102 /* Get servers in global list */
3103 silc_server_announce_get_servers(server, remote->user_data,
3104 server->global_list, &servers,
3108 silc_buffer_push(servers, servers->data - servers->head);
3109 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3111 /* Send the packet */
3112 silc_server_packet_send(server, remote,
3113 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3114 servers->data, servers->len, TRUE);
3116 silc_buffer_free(servers);
3120 /* Returns assembled packet of all clients in the given ID list. The
3121 packet's form is dictated by the New ID Payload. */
3123 static void silc_server_announce_get_clients(SilcServer server,
3125 SilcBuffer *clients,
3126 unsigned long creation_time)
3128 SilcIDCacheList list;
3129 SilcIDCacheEntry id_cache;
3130 SilcClientEntry client;
3133 /* Go through all clients in the list */
3134 if (silc_idcache_get_all(id_list->clients, &list)) {
3135 if (silc_idcache_list_first(list, &id_cache)) {
3137 client = (SilcClientEntry)id_cache->context;
3139 if (creation_time && client->data.created < creation_time) {
3140 if (!silc_idcache_list_next(list, &id_cache))
3145 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3147 *clients = silc_buffer_realloc(*clients,
3149 (*clients)->truelen + idp->len :
3151 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3152 silc_buffer_put(*clients, idp->data, idp->len);
3153 silc_buffer_pull(*clients, idp->len);
3154 silc_buffer_free(idp);
3156 if (!silc_idcache_list_next(list, &id_cache))
3161 silc_idcache_list_free(list);
3165 /* This function is used to announce our existing clients to our router
3166 when we've connected to it. If `creation_time' is non-zero then only
3167 the clients that has been created after the `creation_time' will be
3170 void silc_server_announce_clients(SilcServer server,
3171 unsigned long creation_time,
3172 SilcSocketConnection remote)
3174 SilcBuffer clients = NULL;
3176 SILC_LOG_DEBUG(("Announcing clients"));
3178 /* Get clients in local list */
3179 silc_server_announce_get_clients(server, server->local_list,
3180 &clients, creation_time);
3182 /* As router we announce our global list as well */
3183 if (server->server_type == SILC_ROUTER)
3184 silc_server_announce_get_clients(server, server->global_list,
3185 &clients, creation_time);
3188 silc_buffer_push(clients, clients->data - clients->head);
3189 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3191 /* Send the packet */
3192 silc_server_packet_send(server, remote,
3193 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3194 clients->data, clients->len, TRUE);
3196 silc_buffer_free(clients);
3201 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3207 p = silc_notify_payload_encode(notify, argc, ap);
3213 /* Returns assembled packets for channel users of the `channel'. */
3215 void silc_server_announce_get_channel_users(SilcServer server,
3216 SilcChannelEntry channel,
3217 SilcBuffer *channel_users,
3218 SilcBuffer *channel_users_modes)
3220 SilcChannelClientEntry chl;
3221 SilcHashTableList htl;
3222 SilcBuffer chidp, clidp;
3225 unsigned char mode[4];
3227 SILC_LOG_DEBUG(("Start"));
3229 /* Now find all users on the channel */
3230 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3231 silc_hash_table_list(channel->user_list, &htl);
3232 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3233 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3236 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3237 clidp->data, clidp->len,
3238 chidp->data, chidp->len);
3241 silc_buffer_realloc(*channel_users,
3243 (*channel_users)->truelen + len : len));
3244 silc_buffer_pull_tail(*channel_users,
3245 ((*channel_users)->end -
3246 (*channel_users)->data));
3248 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3249 silc_buffer_pull(*channel_users, len);
3250 silc_buffer_free(tmp);
3252 /* CUMODE notify for mode change on the channel */
3253 SILC_PUT32_MSB(chl->mode, mode);
3254 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3255 3, clidp->data, clidp->len,
3257 clidp->data, clidp->len);
3259 *channel_users_modes =
3260 silc_buffer_realloc(*channel_users_modes,
3261 (*channel_users_modes ?
3262 (*channel_users_modes)->truelen + len : len));
3263 silc_buffer_pull_tail(*channel_users_modes,
3264 ((*channel_users_modes)->end -
3265 (*channel_users_modes)->data));
3267 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3268 silc_buffer_pull(*channel_users_modes, len);
3269 silc_buffer_free(tmp);
3271 silc_buffer_free(clidp);
3273 silc_buffer_free(chidp);
3276 /* Returns assembled packets for all channels and users on those channels
3277 from the given ID List. The packets are in the form dictated by the
3278 New Channel and New Channel User payloads. */
3280 void silc_server_announce_get_channels(SilcServer server,
3282 SilcBuffer *channels,
3283 SilcBuffer *channel_users,
3284 SilcBuffer **channel_users_modes,
3285 uint32 *channel_users_modes_c,
3286 SilcChannelID ***channel_ids,
3287 unsigned long creation_time)
3289 SilcIDCacheList list;
3290 SilcIDCacheEntry id_cache;
3291 SilcChannelEntry channel;
3296 int i = *channel_users_modes_c;
3299 SILC_LOG_DEBUG(("Start"));
3301 /* Go through all channels in the list */
3302 if (silc_idcache_get_all(id_list->channels, &list)) {
3303 if (silc_idcache_list_first(list, &id_cache)) {
3305 channel = (SilcChannelEntry)id_cache->context;
3307 if (creation_time && channel->created < creation_time)
3312 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3313 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3314 name_len = strlen(channel->channel_name);
3317 len = 4 + name_len + id_len + 4;
3319 silc_buffer_realloc(*channels,
3320 (*channels ? (*channels)->truelen +
3322 silc_buffer_pull_tail(*channels,
3323 ((*channels)->end - (*channels)->data));
3324 silc_buffer_format(*channels,
3325 SILC_STR_UI_SHORT(name_len),
3326 SILC_STR_UI_XNSTRING(channel->channel_name,
3328 SILC_STR_UI_SHORT(id_len),
3329 SILC_STR_UI_XNSTRING(cid, id_len),
3330 SILC_STR_UI_INT(channel->mode),
3332 silc_buffer_pull(*channels, len);
3335 *channel_users_modes = silc_realloc(*channel_users_modes,
3336 sizeof(**channel_users_modes) *
3338 (*channel_users_modes)[i] = NULL;
3339 *channel_ids = silc_realloc(*channel_ids,
3340 sizeof(**channel_ids) * (i + 1));
3341 (*channel_ids)[i] = NULL;
3342 silc_server_announce_get_channel_users(server, channel,
3344 channel_users_modes[i]);
3345 (*channel_ids)[i] = channel->id;
3348 if (!silc_idcache_list_next(list, &id_cache))
3352 *channel_users_modes_c += i;
3355 silc_idcache_list_free(list);
3359 /* This function is used to announce our existing channels to our router
3360 when we've connected to it. This also announces the users on the
3361 channels to the router. If the `creation_time' is non-zero only the
3362 channels that was created after the `creation_time' are announced.
3363 Note that the channel users are still announced even if the `creation_time'
3366 void silc_server_announce_channels(SilcServer server,
3367 unsigned long creation_time,
3368 SilcSocketConnection remote)
3370 SilcBuffer channels = NULL, channel_users = NULL;
3371 SilcBuffer *channel_users_modes = NULL;
3372 uint32 channel_users_modes_c = 0;
3373 SilcChannelID **channel_ids = NULL;
3375 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3377 /* Get channels and channel users in local list */
3378 silc_server_announce_get_channels(server, server->local_list,
3379 &channels, &channel_users,
3380 &channel_users_modes,
3381 &channel_users_modes_c,
3382 &channel_ids, creation_time);
3384 /* Get channels and channel users in global list */
3385 silc_server_announce_get_channels(server, server->global_list,
3386 &channels, &channel_users,
3387 &channel_users_modes,
3388 &channel_users_modes_c,
3389 &channel_ids, creation_time);
3392 silc_buffer_push(channels, channels->data - channels->head);
3393 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3395 /* Send the packet */
3396 silc_server_packet_send(server, remote,
3397 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3398 channels->data, channels->len,
3401 silc_buffer_free(channels);
3404 if (channel_users) {
3405 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3406 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3407 channel_users->len);
3409 /* Send the packet */
3410 silc_server_packet_send(server, remote,
3411 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3412 channel_users->data, channel_users->len,
3415 silc_buffer_free(channel_users);
3418 if (channel_users_modes) {
3421 for (i = 0; i < channel_users_modes_c; i++) {
3422 silc_buffer_push(channel_users_modes[i],
3423 channel_users_modes[i]->data -
3424 channel_users_modes[i]->head);
3425 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3426 channel_users_modes[i]->len);
3427 silc_server_packet_send_dest(server, remote,
3428 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3429 channel_ids[i], SILC_ID_CHANNEL,
3430 channel_users_modes[i]->data,
3431 channel_users_modes[i]->len,
3433 silc_buffer_free(channel_users_modes[i]);
3435 silc_free(channel_users_modes);
3436 silc_free(channel_ids);
3440 /* Failure timeout callback. If this is called then we will immediately
3441 process the received failure. We always process the failure with timeout
3442 since we do not want to blindly trust to received failure packets.
3443 This won't be called (the timeout is cancelled) if the failure was
3444 bogus (it is bogus if remote does not close the connection after sending
3447 SILC_TASK_CALLBACK(silc_server_failure_callback)
3449 SilcServerFailureContext f = (SilcServerFailureContext)context;
3451 if (f->sock->protocol) {
3452 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3453 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3459 /* Assembles user list and users mode list from the `channel'. */
3461 void silc_server_get_users_on_channel(SilcServer server,
3462 SilcChannelEntry channel,
3463 SilcBuffer *user_list,
3464 SilcBuffer *mode_list,
3467 SilcChannelClientEntry chl;
3468 SilcHashTableList htl;
3469 SilcBuffer client_id_list;
3470 SilcBuffer client_mode_list;
3472 uint32 list_count = 0, len = 0;
3474 silc_hash_table_list(channel->user_list, &htl);
3475 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3476 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3478 client_id_list = silc_buffer_alloc(len);
3480 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3481 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3482 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3484 silc_hash_table_list(channel->user_list, &htl);
3485 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3487 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3488 silc_buffer_put(client_id_list, idp->data, idp->len);
3489 silc_buffer_pull(client_id_list, idp->len);
3490 silc_buffer_free(idp);
3492 /* Client's mode on channel */
3493 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3494 silc_buffer_pull(client_mode_list, 4);
3498 silc_buffer_push(client_id_list,
3499 client_id_list->data - client_id_list->head);
3500 silc_buffer_push(client_mode_list,
3501 client_mode_list->data - client_mode_list->head);
3503 *user_list = client_id_list;
3504 *mode_list = client_mode_list;
3505 *user_count = list_count;
3508 /* Saves users and their modes to the `channel'. */
3510 void silc_server_save_users_on_channel(SilcServer server,
3511 SilcSocketConnection sock,
3512 SilcChannelEntry channel,
3513 SilcClientID *noadd,
3514 SilcBuffer user_list,
3515 SilcBuffer mode_list,
3520 for (i = 0; i < user_count; i++) {
3523 SilcClientID *client_id;
3524 SilcClientEntry client;
3527 SILC_GET16_MSB(idp_len, user_list->data + 2);
3529 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3530 silc_buffer_pull(user_list, idp_len);
3535 SILC_GET32_MSB(mode, mode_list->data);
3536 silc_buffer_pull(mode_list, 4);
3538 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3539 silc_free(client_id);
3543 /* Check if we have this client cached already. */
3544 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3545 server->server_type, NULL);
3547 client = silc_idlist_find_client_by_id(server->global_list,
3548 client_id, server->server_type,
3551 /* If router did not find such Client ID in its lists then this must
3552 be bogus client or some router in the net is buggy. */
3553 if (server->server_type == SILC_ROUTER) {
3554 silc_free(client_id);
3558 /* We don't have that client anywhere, add it. The client is added
3559 to global list since server didn't have it in the lists so it must be
3561 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3562 silc_id_dup(client_id, SILC_ID_CLIENT),
3563 sock->user_data, NULL);
3565 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3566 silc_free(client_id);
3570 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3573 silc_free(client_id);
3575 if (!silc_server_client_on_channel(client, channel)) {
3576 /* Client was not on the channel, add it. */
3577 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3578 chl->client = client;
3580 chl->channel = channel;
3581 silc_hash_table_add(channel->user_list, chl->client, chl);
3582 silc_hash_table_add(client->channels, chl->channel, chl);
3587 /* Lookups route to the client indicated by the `id_data'. The connection
3588 object and internal data object is returned. Returns NULL if route
3589 could not be found to the client. If the `client_id' is specified then
3590 it is used and the `id_data' is ignored. */
3592 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3593 unsigned char *id_data,
3595 SilcClientID *client_id,
3596 SilcIDListData *idata)
3599 SilcClientEntry client;
3601 SILC_LOG_DEBUG(("Start"));
3603 /* Decode destination Client ID */
3605 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3607 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3611 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3614 /* If the destination belongs to our server we don't have to route
3615 the packet anywhere but to send it to the local destination. */
3616 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3620 /* If we are router and the client has router then the client is in
3621 our cell but not directly connected to us. */
3622 if (server->server_type == SILC_ROUTER && client->router) {
3623 /* We are of course in this case the client's router thus the route
3624 to the client is the server who owns the client. So, we will send
3625 the packet to that server. */
3627 *idata = (SilcIDListData)client->router;
3628 return client->router->connection;
3631 /* Seems that client really is directly connected to us */
3633 *idata = (SilcIDListData)client;
3634 return client->connection;
3637 /* Destination belongs to someone not in this server. If we are normal
3638 server our action is to send the packet to our router. */
3639 if (server->server_type != SILC_ROUTER && !server->standalone) {
3642 *idata = (SilcIDListData)server->router;
3643 return server->router->connection;
3646 /* We are router and we will perform route lookup for the destination
3647 and send the packet to fastest route. */
3648 if (server->server_type == SILC_ROUTER && !server->standalone) {
3649 /* Check first that the ID is valid */
3650 client = silc_idlist_find_client_by_id(server->global_list, id,
3653 SilcSocketConnection dst_sock;
3655 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3659 *idata = (SilcIDListData)dst_sock->user_data;
3668 /* Encodes and returns channel list of channels the `client' has joined.
3669 Secret channels are not put to the list. */
3671 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3672 SilcClientEntry client)
3674 SilcBuffer buffer = NULL;
3675 SilcChannelEntry channel;
3676 SilcChannelClientEntry chl;
3677 SilcHashTableList htl;
3683 silc_hash_table_list(client->channels, &htl);
3684 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3685 channel = chl->channel;
3687 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3688 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3691 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3692 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3693 name_len = strlen(channel->channel_name);
3695 len = 4 + name_len + id_len + 4;
3696 buffer = silc_buffer_realloc(buffer,
3697 (buffer ? (buffer)->truelen + len : len));
3698 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3699 silc_buffer_format(buffer,
3700 SILC_STR_UI_SHORT(name_len),
3701 SILC_STR_UI_XNSTRING(channel->channel_name,
3703 SILC_STR_UI_SHORT(id_len),
3704 SILC_STR_UI_XNSTRING(cid, id_len),
3705 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3707 silc_buffer_pull(buffer, len);
3712 silc_buffer_push(buffer, buffer->data - buffer->head);
3717 /* Finds client entry by Client ID and if it is not found then resolves
3718 it using WHOIS command. */
3720 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3721 SilcClientID *client_id)
3723 SilcClientEntry client;
3725 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3728 client = silc_idlist_find_client_by_id(server->global_list,
3729 client_id, TRUE, NULL);
3730 if (!client && server->server_type == SILC_ROUTER)
3734 if (!client && server->standalone)
3737 if (!client || !client->nickname || !client->username) {
3738 SilcBuffer buffer, idp;
3740 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3741 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3742 client->resolve_cmd_ident = ++server->cmd_ident;
3744 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3745 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3746 server->cmd_ident, 1,
3747 3, idp->data, idp->len);
3748 silc_server_packet_send(server, client ? client->router->connection :
3749 server->router->connection,
3750 SILC_PACKET_COMMAND, 0,
3751 buffer->data, buffer->len, FALSE);
3752 silc_buffer_free(idp);
3753 silc_buffer_free(buffer);
3760 /* A timeout callback for the re-key. We will be the initiator of the
3763 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3765 SilcSocketConnection sock = (SilcSocketConnection)context;
3766 SilcIDListData idata = (SilcIDListData)sock->user_data;
3767 SilcServer server = (SilcServer)idata->rekey->context;
3768 SilcProtocol protocol;
3769 SilcServerRekeyInternalContext *proto_ctx;
3771 SILC_LOG_DEBUG(("Start"));
3773 /* Allocate internal protocol context. This is sent as context
3775 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3776 proto_ctx->server = (void *)server;
3777 proto_ctx->sock = sock;
3778 proto_ctx->responder = FALSE;
3779 proto_ctx->pfs = idata->rekey->pfs;
3781 /* Perform rekey protocol. Will call the final callback after the
3782 protocol is over. */
3783 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3784 &protocol, proto_ctx, silc_server_rekey_final);
3785 sock->protocol = protocol;
3787 /* Run the protocol */
3788 silc_protocol_execute(protocol, server->schedule, 0, 0);
3790 /* Re-register re-key timeout */
3791 silc_schedule_task_add(server->schedule, sock->sock,
3792 silc_server_rekey_callback,
3793 context, idata->rekey->timeout, 0,
3794 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3797 /* The final callback for the REKEY protocol. This will actually take the
3798 new key material into use. */
3800 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3802 SilcProtocol protocol = (SilcProtocol)context;
3803 SilcServerRekeyInternalContext *ctx =
3804 (SilcServerRekeyInternalContext *)protocol->context;
3805 SilcServer server = (SilcServer)ctx->server;
3806 SilcSocketConnection sock = ctx->sock;
3808 SILC_LOG_DEBUG(("Start"));
3810 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3811 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3812 /* Error occured during protocol */
3813 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3814 silc_protocol_cancel(protocol, server->schedule);
3815 silc_protocol_free(protocol);
3816 sock->protocol = NULL;
3818 silc_packet_context_free(ctx->packet);
3820 silc_ske_free(ctx->ske);
3825 /* Purge the outgoing data queue to assure that all rekey packets really
3826 go to the network before we quit the protocol. */
3827 silc_server_packet_queue_purge(server, sock);
3830 silc_protocol_free(protocol);
3831 sock->protocol = NULL;
3833 silc_packet_context_free(ctx->packet);
3835 silc_ske_free(ctx->ske);