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:
2100 SILC_LOG_DEBUG(("FTP packet"));
2101 if (packet->flags & SILC_PACKET_FLAG_LIST)
2103 silc_server_ftp(server, sock, packet);
2106 case SILC_PACKET_RESUME_ROUTER:
2107 /* Resume router packet received. This packet is received for backup
2108 router resuming protocol. */
2109 SILC_LOG_DEBUG(("Resume router packet"));
2110 if (packet->flags & SILC_PACKET_FLAG_LIST)
2112 silc_server_backup_resume_router(server, sock, packet);
2116 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2122 /* Creates connection to a remote router. */
2124 void silc_server_create_connection(SilcServer server,
2125 char *remote_host, uint32 port)
2127 SilcServerConnection sconn;
2129 /* Allocate connection object for hold connection specific stuff. */
2130 sconn = silc_calloc(1, sizeof(*sconn));
2131 sconn->server = server;
2132 sconn->remote_host = strdup(remote_host);
2133 sconn->remote_port = port;
2135 silc_schedule_task_add(server->schedule, 0,
2136 silc_server_connect_router,
2137 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2138 SILC_TASK_PRI_NORMAL);
2141 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2143 silc_socket_free((SilcSocketConnection)context);
2146 /* Closes connection to socket connection */
2148 void silc_server_close_connection(SilcServer server,
2149 SilcSocketConnection sock)
2151 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2153 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2154 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2155 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2158 /* We won't listen for this connection anymore */
2159 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2161 /* Unregister all tasks */
2162 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2164 /* Close the actual connection */
2165 silc_net_close_connection(sock->sock);
2166 server->sockets[sock->sock] = NULL;
2168 /* If sock->user_data is NULL then we'll check for active protocols
2169 here since the silc_server_free_sock_user_data has not been called
2170 for this connection. */
2171 if (!sock->user_data) {
2172 /* If any protocol is active cancel its execution. It will call
2173 the final callback which will finalize the disconnection. */
2174 if (sock->protocol) {
2175 silc_protocol_cancel(sock->protocol, server->schedule);
2176 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2177 silc_protocol_execute_final(sock->protocol, server->schedule);
2178 sock->protocol = NULL;
2183 silc_schedule_task_add(server->schedule, 0,
2184 silc_server_close_connection_final,
2185 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2186 SILC_TASK_PRI_NORMAL);
2189 /* Sends disconnect message to remote connection and disconnects the
2192 void silc_server_disconnect_remote(SilcServer server,
2193 SilcSocketConnection sock,
2194 const char *fmt, ...)
2197 unsigned char buf[4096];
2202 memset(buf, 0, sizeof(buf));
2204 vsprintf(buf, fmt, ap);
2207 SILC_LOG_DEBUG(("Disconnecting remote host"));
2209 /* Notify remote end that the conversation is over. The notify message
2210 is tried to be sent immediately. */
2211 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2212 buf, strlen(buf), TRUE);
2214 /* Mark the connection to be disconnected */
2215 SILC_SET_DISCONNECTED(sock);
2216 silc_server_close_connection(server, sock);
2221 SilcClientEntry client;
2222 } *FreeClientInternal;
2224 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2226 FreeClientInternal i = (FreeClientInternal)context;
2228 silc_idlist_del_data(i->client);
2229 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2233 /* Frees client data and notifies about client's signoff. */
2235 void silc_server_free_client_data(SilcServer server,
2236 SilcSocketConnection sock,
2237 SilcClientEntry client,
2241 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2243 /* If there is pending outgoing data for the client then purge it
2244 to the network before removing the client entry. */
2245 silc_server_packet_queue_purge(server, sock);
2250 /* Send SIGNOFF notify to routers. */
2251 if (notify && !server->standalone && server->router)
2252 silc_server_send_notify_signoff(server, server->router->connection,
2253 server->server_type == SILC_SERVER ?
2254 FALSE : TRUE, client->id, signoff);
2256 /* Remove client from all channels */
2258 silc_server_remove_from_channels(server, NULL, client,
2259 TRUE, signoff, TRUE);
2261 silc_server_remove_from_channels(server, NULL, client,
2262 FALSE, NULL, FALSE);
2264 /* We will not delete the client entry right away. We will take it
2265 into history (for WHOWAS command) for 5 minutes */
2268 silc_schedule_task_add(server->schedule, 0,
2269 silc_server_free_client_data_timeout,
2271 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2272 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2273 client->router = NULL;
2274 client->connection = NULL;
2276 /* Free the client entry and everything in it */
2277 server->stat.my_clients--;
2278 server->stat.clients--;
2279 if (server->server_type == SILC_ROUTER)
2280 server->stat.cell_clients--;
2283 /* Frees user_data pointer from socket connection object. This also sends
2284 appropriate notify packets to the network to inform about leaving
2287 void silc_server_free_sock_user_data(SilcServer server,
2288 SilcSocketConnection sock)
2290 SILC_LOG_DEBUG(("Start"));
2292 switch (sock->type) {
2293 case SILC_SOCKET_TYPE_CLIENT:
2295 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2296 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2299 case SILC_SOCKET_TYPE_SERVER:
2300 case SILC_SOCKET_TYPE_ROUTER:
2302 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2303 SilcServerEntry backup_router = NULL;
2306 backup_router = silc_server_backup_get(server, user_data->id);
2308 /* If this was our primary router connection then we're lost to
2309 the outside world. */
2310 if (server->router == user_data) {
2311 /* Check whether we have a backup router connection */
2312 if (!backup_router || backup_router == user_data) {
2313 silc_schedule_task_add(server->schedule, 0,
2314 silc_server_connect_to_router,
2317 SILC_TASK_PRI_NORMAL);
2319 server->id_entry->router = NULL;
2320 server->router = NULL;
2321 server->standalone = TRUE;
2322 backup_router = NULL;
2324 SILC_LOG_INFO(("New primary router is backup router %s",
2325 backup_router->server_name));
2326 SILC_LOG_DEBUG(("New primary router is backup router %s",
2327 backup_router->server_name));
2328 server->id_entry->router = backup_router;
2329 server->router = backup_router;
2330 server->router_connect = time(0);
2331 server->backup_primary = TRUE;
2332 if (server->server_type == SILC_BACKUP_ROUTER) {
2333 server->server_type = SILC_ROUTER;
2335 /* We'll need to constantly try to reconnect to the primary
2336 router so that we'll see when it comes back online. */
2337 silc_server_backup_reconnect(server, sock->ip, sock->port,
2338 silc_server_backup_connected,
2342 /* Mark this connection as replaced */
2343 silc_server_backup_replaced_add(server, user_data->id,
2346 } else if (backup_router) {
2347 SILC_LOG_INFO(("Enabling the use of backup router %s",
2348 backup_router->server_name));
2349 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2350 backup_router->server_name));
2352 /* Mark this connection as replaced */
2353 silc_server_backup_replaced_add(server, user_data->id,
2357 if (!backup_router) {
2358 /* Free all client entries that this server owns as they will
2359 become invalid now as well. */
2361 silc_server_remove_clients_by_server(server, user_data, TRUE);
2363 /* Update the client entries of this server to the new backup
2364 router. This also removes the clients that *really* was owned
2365 by the primary router and went down with the router. */
2366 silc_server_update_clients_by_server(server, user_data, backup_router,
2368 silc_server_update_servers_by_server(server, user_data, backup_router);
2371 /* Free the server entry */
2372 silc_server_backup_del(server, user_data);
2373 silc_server_backup_replaced_del(server, user_data);
2374 silc_idlist_del_data(user_data);
2375 if (!silc_idlist_del_server(server->local_list, user_data))
2376 silc_idlist_del_server(server->global_list, user_data);
2377 server->stat.my_servers--;
2378 server->stat.servers--;
2379 if (server->server_type == SILC_ROUTER)
2380 server->stat.cell_servers--;
2382 if (backup_router) {
2383 /* Announce all of our stuff that was created about 5 minutes ago.
2384 The backup router knows all the other stuff already. */
2385 if (server->server_type == SILC_ROUTER)
2386 silc_server_announce_servers(server, FALSE, time(0) - 300,
2387 backup_router->connection);
2389 /* Announce our clients and channels to the router */
2390 silc_server_announce_clients(server, time(0) - 300,
2391 backup_router->connection);
2392 silc_server_announce_channels(server, time(0) - 300,
2393 backup_router->connection);
2399 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2401 silc_idlist_del_data(user_data);
2402 silc_free(user_data);
2407 /* If any protocol is active cancel its execution */
2408 if (sock->protocol) {
2409 silc_protocol_cancel(sock->protocol, server->schedule);
2410 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2411 silc_protocol_execute_final(sock->protocol, server->schedule);
2412 sock->protocol = NULL;
2415 sock->user_data = NULL;
2418 /* Removes client from all channels it has joined. This is used when client
2419 connection is disconnected. If the client on a channel is last, the
2420 channel is removed as well. This sends the SIGNOFF notify types. */
2422 void silc_server_remove_from_channels(SilcServer server,
2423 SilcSocketConnection sock,
2424 SilcClientEntry client,
2426 char *signoff_message,
2429 SilcChannelEntry channel;
2430 SilcChannelClientEntry chl;
2431 SilcHashTableList htl;
2434 SILC_LOG_DEBUG(("Start"));
2436 if (!client || !client->id)
2439 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2441 /* Remove the client from all channels. The client is removed from
2442 the channels' user list. */
2443 silc_hash_table_list(client->channels, &htl);
2444 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2445 channel = chl->channel;
2447 /* Remove channel from client's channel list */
2448 silc_hash_table_del(client->channels, channel);
2450 /* Remove channel if there is no users anymore */
2451 if (server->server_type == SILC_ROUTER &&
2452 silc_hash_table_count(channel->user_list) < 2) {
2454 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2455 if (silc_idlist_del_channel(server->local_list, channel))
2456 server->stat.my_channels--;
2457 else if (silc_idlist_del_channel(server->global_list, channel))
2458 server->stat.my_channels--;
2462 /* Remove client from channel's client list */
2463 silc_hash_table_del(channel->user_list, chl->client);
2465 /* If there is no global users on the channel anymore mark the channel
2466 as local channel. Do not check if the removed client is local client. */
2467 if (server->server_type != SILC_ROUTER && channel->global_users &&
2468 chl->client->router && !silc_server_channel_has_global(channel))
2469 channel->global_users = FALSE;
2472 server->stat.my_chanclients--;
2474 /* If there is not at least one local user on the channel then we don't
2475 need the channel entry anymore, we can remove it safely. */
2476 if (server->server_type != SILC_ROUTER &&
2477 !silc_server_channel_has_local(channel)) {
2478 /* Notify about leaving client if this channel has global users. */
2479 if (notify && channel->global_users)
2480 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2481 SILC_NOTIFY_TYPE_SIGNOFF,
2482 signoff_message ? 2 : 1,
2483 clidp->data, clidp->len,
2484 signoff_message, signoff_message ?
2485 strlen(signoff_message) : 0);
2488 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2490 if (channel->founder_key) {
2491 /* The founder auth data exists, do not remove the channel entry */
2492 SilcChannelClientEntry chl2;
2493 SilcHashTableList htl2;
2497 silc_hash_table_list(channel->user_list, &htl2);
2498 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2499 silc_hash_table_del(chl2->client->channels, channel);
2500 silc_hash_table_del(channel->user_list, chl2->client);
2506 /* Remove the channel entry */
2507 if (silc_idlist_del_channel(server->local_list, channel))
2508 server->stat.my_channels--;
2509 else if (silc_idlist_del_channel(server->global_list, channel))
2510 server->stat.my_channels--;
2514 /* Send notify to channel about client leaving SILC and thus
2515 the entire channel. */
2517 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2518 SILC_NOTIFY_TYPE_SIGNOFF,
2519 signoff_message ? 2 : 1,
2520 clidp->data, clidp->len,
2521 signoff_message, signoff_message ?
2522 strlen(signoff_message) : 0);
2524 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2525 /* Re-generate channel key */
2526 if (!silc_server_create_channel_key(server, channel, 0))
2529 /* Send the channel key to the channel. The key of course is not sent
2530 to the client who was removed from the channel. */
2531 silc_server_send_channel_key(server, client->connection, channel,
2532 server->server_type == SILC_ROUTER ?
2533 FALSE : !server->standalone);
2537 silc_buffer_free(clidp);
2540 /* Removes client from one channel. This is used for example when client
2541 calls LEAVE command to remove itself from the channel. Returns TRUE
2542 if channel still exists and FALSE if the channel is removed when
2543 last client leaves the channel. If `notify' is FALSE notify messages
2546 int silc_server_remove_from_one_channel(SilcServer server,
2547 SilcSocketConnection sock,
2548 SilcChannelEntry channel,
2549 SilcClientEntry client,
2552 SilcChannelClientEntry chl;
2555 SILC_LOG_DEBUG(("Start"));
2557 /* Get the entry to the channel, if this client is not on the channel
2559 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2562 /* Remove the client from the channel. The client is removed from
2563 the channel's user list. */
2565 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2567 /* Remove channel from client's channel list */
2568 silc_hash_table_del(client->channels, chl->channel);
2570 /* Remove channel if there is no users anymore */
2571 if (server->server_type == SILC_ROUTER &&
2572 silc_hash_table_count(channel->user_list) < 2) {
2574 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2575 if (silc_idlist_del_channel(server->local_list, channel))
2576 server->stat.my_channels--;
2577 else if (silc_idlist_del_channel(server->global_list, channel))
2578 server->stat.my_channels--;
2579 silc_buffer_free(clidp);
2583 /* Remove client from channel's client list */
2584 silc_hash_table_del(channel->user_list, chl->client);
2586 /* If there is no global users on the channel anymore mark the channel
2587 as local channel. Do not check if the client is local client. */
2588 if (server->server_type != SILC_ROUTER && channel->global_users &&
2589 chl->client->router && !silc_server_channel_has_global(channel))
2590 channel->global_users = FALSE;
2593 server->stat.my_chanclients--;
2595 /* If there is not at least one local user on the channel then we don't
2596 need the channel entry anymore, we can remove it safely. */
2597 if (server->server_type != SILC_ROUTER &&
2598 !silc_server_channel_has_local(channel)) {
2599 /* Notify about leaving client if this channel has global users. */
2600 if (notify && channel->global_users)
2601 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2602 SILC_NOTIFY_TYPE_LEAVE, 1,
2603 clidp->data, clidp->len);
2605 silc_buffer_free(clidp);
2608 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2610 if (channel->founder_key) {
2611 /* The founder auth data exists, do not remove the channel entry */
2612 SilcChannelClientEntry chl2;
2613 SilcHashTableList htl2;
2617 silc_hash_table_list(channel->user_list, &htl2);
2618 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2619 silc_hash_table_del(chl2->client->channels, channel);
2620 silc_hash_table_del(channel->user_list, chl2->client);
2626 /* Remove the channel entry */
2627 if (silc_idlist_del_channel(server->local_list, channel))
2628 server->stat.my_channels--;
2629 else if (silc_idlist_del_channel(server->global_list, channel))
2630 server->stat.my_channels--;
2634 /* Send notify to channel about client leaving the channel */
2636 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2637 SILC_NOTIFY_TYPE_LEAVE, 1,
2638 clidp->data, clidp->len);
2640 silc_buffer_free(clidp);
2644 /* Timeout callback. This is called if connection is idle or for some
2645 other reason is not responding within some period of time. This
2646 disconnects the remote end. */
2648 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2650 SilcServer server = (SilcServer)context;
2651 SilcSocketConnection sock = server->sockets[fd];
2653 SILC_LOG_DEBUG(("Start"));
2658 /* If we have protocol active we must assure that we call the protocol's
2659 final callback so that all the memory is freed. */
2660 if (sock->protocol) {
2661 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2662 silc_protocol_execute_final(sock->protocol, server->schedule);
2666 if (sock->user_data)
2667 silc_server_free_sock_user_data(server, sock);
2669 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2670 "Connection timeout");
2673 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2674 function may be used only by router. In real SILC network all channels
2675 are created by routers thus this function is never used by normal
2678 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2679 SilcServerID *router_id,
2685 SilcChannelID *channel_id;
2686 SilcChannelEntry entry;
2690 SILC_LOG_DEBUG(("Creating new channel"));
2693 cipher = SILC_DEFAULT_CIPHER;
2695 hmac = SILC_DEFAULT_HMAC;
2697 /* Allocate cipher */
2698 if (!silc_cipher_alloc(cipher, &key))
2702 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2703 silc_cipher_free(key);
2707 channel_name = strdup(channel_name);
2709 /* Create the channel */
2710 if (!silc_id_create_channel_id(server, router_id, server->rng,
2712 silc_free(channel_name);
2713 silc_cipher_free(key);
2714 silc_hmac_free(newhmac);
2717 entry = silc_idlist_add_channel(server->local_list, channel_name,
2718 SILC_CHANNEL_MODE_NONE, channel_id,
2719 NULL, key, newhmac);
2721 silc_free(channel_name);
2722 silc_cipher_free(key);
2723 silc_hmac_free(newhmac);
2727 entry->cipher = strdup(cipher);
2728 entry->hmac_name = strdup(hmac);
2730 /* Now create the actual key material */
2731 if (!silc_server_create_channel_key(server, entry,
2732 silc_cipher_get_key_len(key) / 8)) {
2733 silc_free(channel_name);
2734 silc_cipher_free(key);
2735 silc_hmac_free(newhmac);
2736 silc_free(entry->cipher);
2737 silc_free(entry->hmac_name);
2741 /* Notify other routers about the new channel. We send the packet
2742 to our primary route. */
2743 if (broadcast && server->standalone == FALSE)
2744 silc_server_send_new_channel(server, server->router->connection, TRUE,
2745 channel_name, entry->id,
2746 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2749 server->stat.my_channels++;
2754 /* Same as above but creates the channel with Channel ID `channel_id. */
2757 silc_server_create_new_channel_with_id(SilcServer server,
2761 SilcChannelID *channel_id,
2764 SilcChannelEntry entry;
2768 SILC_LOG_DEBUG(("Creating new channel"));
2771 cipher = SILC_DEFAULT_CIPHER;
2773 hmac = SILC_DEFAULT_HMAC;
2775 /* Allocate cipher */
2776 if (!silc_cipher_alloc(cipher, &key))
2780 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2781 silc_cipher_free(key);
2785 channel_name = strdup(channel_name);
2787 /* Create the channel */
2788 entry = silc_idlist_add_channel(server->local_list, channel_name,
2789 SILC_CHANNEL_MODE_NONE, channel_id,
2790 NULL, key, newhmac);
2792 silc_free(channel_name);
2796 /* Now create the actual key material */
2797 if (!silc_server_create_channel_key(server, entry,
2798 silc_cipher_get_key_len(key) / 8)) {
2799 silc_free(channel_name);
2803 /* Notify other routers about the new channel. We send the packet
2804 to our primary route. */
2805 if (broadcast && server->standalone == FALSE)
2806 silc_server_send_new_channel(server, server->router->connection, TRUE,
2807 channel_name, entry->id,
2808 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2811 server->stat.my_channels++;
2816 /* Channel's key re-key timeout callback. */
2818 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2820 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2821 SilcServer server = (SilcServer)rekey->context;
2825 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2828 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2831 /* Generates new channel key. This is used to create the initial channel key
2832 but also to re-generate new key for channel. If `key_len' is provided
2833 it is the bytes of the key length. */
2835 bool silc_server_create_channel_key(SilcServer server,
2836 SilcChannelEntry channel,
2840 unsigned char channel_key[32], hash[32];
2843 SILC_LOG_DEBUG(("Generating channel key"));
2845 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2846 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2850 if (!channel->channel_key)
2851 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2856 else if (channel->key_len)
2857 len = channel->key_len / 8;
2859 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2861 /* Create channel key */
2862 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2865 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2867 /* Remove old key if exists */
2869 memset(channel->key, 0, channel->key_len / 8);
2870 silc_free(channel->key);
2874 channel->key_len = len * 8;
2875 channel->key = silc_calloc(len, sizeof(*channel->key));
2876 memcpy(channel->key, channel_key, len);
2877 memset(channel_key, 0, sizeof(channel_key));
2879 /* Generate HMAC key from the channel key data and set it */
2881 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2882 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2883 silc_hmac_set_key(channel->hmac, hash,
2884 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2885 memset(hash, 0, sizeof(hash));
2887 if (server->server_type == SILC_ROUTER) {
2888 if (!channel->rekey)
2889 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2890 channel->rekey->context = (void *)server;
2891 channel->rekey->channel = channel;
2892 channel->rekey->key_len = key_len;
2893 if (channel->rekey->task)
2894 silc_schedule_task_del(server->schedule, channel->rekey->task);
2896 channel->rekey->task =
2897 silc_schedule_task_add(server->schedule, 0,
2898 silc_server_channel_key_rekey,
2899 (void *)channel->rekey, 3600, 0,
2901 SILC_TASK_PRI_NORMAL);
2907 /* Saves the channel key found in the encoded `key_payload' buffer. This
2908 function is used when we receive Channel Key Payload and also when we're
2909 processing JOIN command reply. Returns entry to the channel. */
2911 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2912 SilcBuffer key_payload,
2913 SilcChannelEntry channel)
2915 SilcChannelKeyPayload payload = NULL;
2916 SilcChannelID *id = NULL;
2917 unsigned char *tmp, hash[32];
2921 SILC_LOG_DEBUG(("Start"));
2923 /* Decode channel key payload */
2924 payload = silc_channel_key_payload_parse(key_payload);
2926 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2931 /* Get the channel entry */
2934 /* Get channel ID */
2935 tmp = silc_channel_key_get_id(payload, &tmp_len);
2936 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2942 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2944 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2946 SILC_LOG_ERROR(("Received key for non-existent channel"));
2952 tmp = silc_channel_key_get_key(payload, &tmp_len);
2958 cipher = silc_channel_key_get_cipher(payload, NULL);
2964 /* Remove old key if exists */
2966 memset(channel->key, 0, channel->key_len / 8);
2967 silc_free(channel->key);
2968 silc_cipher_free(channel->channel_key);
2971 /* Create new cipher */
2972 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2977 if (channel->cipher)
2978 silc_free(channel->cipher);
2979 channel->cipher = strdup(cipher);
2982 channel->key_len = tmp_len * 8;
2983 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2984 memcpy(channel->key, tmp, tmp_len);
2985 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2987 /* Generate HMAC key from the channel key data and set it */
2989 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2990 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
2991 silc_hmac_set_key(channel->hmac, hash,
2992 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2994 memset(hash, 0, sizeof(hash));
2995 memset(tmp, 0, tmp_len);
2997 if (server->server_type == SILC_ROUTER) {
2998 if (!channel->rekey)
2999 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3000 channel->rekey->context = (void *)server;
3001 channel->rekey->channel = channel;
3002 if (channel->rekey->task)
3003 silc_schedule_task_del(server->schedule, channel->rekey->task);
3005 channel->rekey->task =
3006 silc_schedule_task_add(server->schedule, 0,
3007 silc_server_channel_key_rekey,
3008 (void *)channel->rekey, 3600, 0,
3010 SILC_TASK_PRI_NORMAL);
3016 silc_channel_key_payload_free(payload);
3021 /* Heartbeat callback. This function is set as argument for the
3022 silc_socket_set_heartbeat function. The library will call this function
3023 at the set time interval. */
3025 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3028 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3030 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3033 /* Send the heartbeat */
3034 silc_server_send_heartbeat(hb->server, sock);
3037 /* Returns assembled of all servers in the given ID list. The packet's
3038 form is dictated by the New ID payload. */
3040 static void silc_server_announce_get_servers(SilcServer server,
3041 SilcServerEntry remote,
3043 SilcBuffer *servers,
3044 unsigned long creation_time)
3046 SilcIDCacheList list;
3047 SilcIDCacheEntry id_cache;
3048 SilcServerEntry entry;
3051 /* Go through all clients in the list */
3052 if (silc_idcache_get_all(id_list->servers, &list)) {
3053 if (silc_idcache_list_first(list, &id_cache)) {
3055 entry = (SilcServerEntry)id_cache->context;
3057 /* Do not announce the one we've sending our announcements and
3058 do not announce ourself. Also check the creation time if it's
3060 if ((entry == remote) || (entry == server->id_entry) ||
3061 (creation_time && entry->data.created < creation_time)) {
3062 if (!silc_idcache_list_next(list, &id_cache))
3067 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3069 *servers = silc_buffer_realloc(*servers,
3071 (*servers)->truelen + idp->len :
3073 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3074 silc_buffer_put(*servers, idp->data, idp->len);
3075 silc_buffer_pull(*servers, idp->len);
3076 silc_buffer_free(idp);
3078 if (!silc_idcache_list_next(list, &id_cache))
3083 silc_idcache_list_free(list);
3087 /* This function is used by router to announce existing servers to our
3088 primary router when we've connected to it. If `creation_time' is non-zero
3089 then only the servers that has been created after the `creation_time'
3090 will be announced. */
3092 void silc_server_announce_servers(SilcServer server, bool global,
3093 unsigned long creation_time,
3094 SilcSocketConnection remote)
3096 SilcBuffer servers = NULL;
3098 SILC_LOG_DEBUG(("Announcing servers"));
3100 /* Get servers in local list */
3101 silc_server_announce_get_servers(server, remote->user_data,
3102 server->local_list, &servers,
3106 /* Get servers in global list */
3107 silc_server_announce_get_servers(server, remote->user_data,
3108 server->global_list, &servers,
3112 silc_buffer_push(servers, servers->data - servers->head);
3113 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3115 /* Send the packet */
3116 silc_server_packet_send(server, remote,
3117 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3118 servers->data, servers->len, TRUE);
3120 silc_buffer_free(servers);
3124 /* Returns assembled packet of all clients in the given ID list. The
3125 packet's form is dictated by the New ID Payload. */
3127 static void silc_server_announce_get_clients(SilcServer server,
3129 SilcBuffer *clients,
3130 unsigned long creation_time)
3132 SilcIDCacheList list;
3133 SilcIDCacheEntry id_cache;
3134 SilcClientEntry client;
3137 /* Go through all clients in the list */
3138 if (silc_idcache_get_all(id_list->clients, &list)) {
3139 if (silc_idcache_list_first(list, &id_cache)) {
3141 client = (SilcClientEntry)id_cache->context;
3143 if (creation_time && client->data.created < creation_time) {
3144 if (!silc_idcache_list_next(list, &id_cache))
3149 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3151 *clients = silc_buffer_realloc(*clients,
3153 (*clients)->truelen + idp->len :
3155 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3156 silc_buffer_put(*clients, idp->data, idp->len);
3157 silc_buffer_pull(*clients, idp->len);
3158 silc_buffer_free(idp);
3160 if (!silc_idcache_list_next(list, &id_cache))
3165 silc_idcache_list_free(list);
3169 /* This function is used to announce our existing clients to our router
3170 when we've connected to it. If `creation_time' is non-zero then only
3171 the clients that has been created after the `creation_time' will be
3174 void silc_server_announce_clients(SilcServer server,
3175 unsigned long creation_time,
3176 SilcSocketConnection remote)
3178 SilcBuffer clients = NULL;
3180 SILC_LOG_DEBUG(("Announcing clients"));
3182 /* Get clients in local list */
3183 silc_server_announce_get_clients(server, server->local_list,
3184 &clients, creation_time);
3186 /* As router we announce our global list as well */
3187 if (server->server_type == SILC_ROUTER)
3188 silc_server_announce_get_clients(server, server->global_list,
3189 &clients, creation_time);
3192 silc_buffer_push(clients, clients->data - clients->head);
3193 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3195 /* Send the packet */
3196 silc_server_packet_send(server, remote,
3197 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3198 clients->data, clients->len, TRUE);
3200 silc_buffer_free(clients);
3205 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3211 p = silc_notify_payload_encode(notify, argc, ap);
3217 /* Returns assembled packets for channel users of the `channel'. */
3219 void silc_server_announce_get_channel_users(SilcServer server,
3220 SilcChannelEntry channel,
3221 SilcBuffer *channel_users,
3222 SilcBuffer *channel_users_modes)
3224 SilcChannelClientEntry chl;
3225 SilcHashTableList htl;
3226 SilcBuffer chidp, clidp;
3229 unsigned char mode[4];
3231 SILC_LOG_DEBUG(("Start"));
3233 /* Now find all users on the channel */
3234 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3235 silc_hash_table_list(channel->user_list, &htl);
3236 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3237 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3240 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3241 clidp->data, clidp->len,
3242 chidp->data, chidp->len);
3245 silc_buffer_realloc(*channel_users,
3247 (*channel_users)->truelen + len : len));
3248 silc_buffer_pull_tail(*channel_users,
3249 ((*channel_users)->end -
3250 (*channel_users)->data));
3252 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3253 silc_buffer_pull(*channel_users, len);
3254 silc_buffer_free(tmp);
3256 /* CUMODE notify for mode change on the channel */
3257 SILC_PUT32_MSB(chl->mode, mode);
3258 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3259 3, clidp->data, clidp->len,
3261 clidp->data, clidp->len);
3263 *channel_users_modes =
3264 silc_buffer_realloc(*channel_users_modes,
3265 (*channel_users_modes ?
3266 (*channel_users_modes)->truelen + len : len));
3267 silc_buffer_pull_tail(*channel_users_modes,
3268 ((*channel_users_modes)->end -
3269 (*channel_users_modes)->data));
3271 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3272 silc_buffer_pull(*channel_users_modes, len);
3273 silc_buffer_free(tmp);
3275 silc_buffer_free(clidp);
3277 silc_buffer_free(chidp);
3280 /* Returns assembled packets for all channels and users on those channels
3281 from the given ID List. The packets are in the form dictated by the
3282 New Channel and New Channel User payloads. */
3284 void silc_server_announce_get_channels(SilcServer server,
3286 SilcBuffer *channels,
3287 SilcBuffer *channel_users,
3288 SilcBuffer **channel_users_modes,
3289 uint32 *channel_users_modes_c,
3290 SilcChannelID ***channel_ids,
3291 unsigned long creation_time)
3293 SilcIDCacheList list;
3294 SilcIDCacheEntry id_cache;
3295 SilcChannelEntry channel;
3300 int i = *channel_users_modes_c;
3303 SILC_LOG_DEBUG(("Start"));
3305 /* Go through all channels in the list */
3306 if (silc_idcache_get_all(id_list->channels, &list)) {
3307 if (silc_idcache_list_first(list, &id_cache)) {
3309 channel = (SilcChannelEntry)id_cache->context;
3311 if (creation_time && channel->created < creation_time)
3316 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3317 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3318 name_len = strlen(channel->channel_name);
3321 len = 4 + name_len + id_len + 4;
3323 silc_buffer_realloc(*channels,
3324 (*channels ? (*channels)->truelen +
3326 silc_buffer_pull_tail(*channels,
3327 ((*channels)->end - (*channels)->data));
3328 silc_buffer_format(*channels,
3329 SILC_STR_UI_SHORT(name_len),
3330 SILC_STR_UI_XNSTRING(channel->channel_name,
3332 SILC_STR_UI_SHORT(id_len),
3333 SILC_STR_UI_XNSTRING(cid, id_len),
3334 SILC_STR_UI_INT(channel->mode),
3336 silc_buffer_pull(*channels, len);
3339 *channel_users_modes = silc_realloc(*channel_users_modes,
3340 sizeof(**channel_users_modes) *
3342 (*channel_users_modes)[i] = NULL;
3343 *channel_ids = silc_realloc(*channel_ids,
3344 sizeof(**channel_ids) * (i + 1));
3345 (*channel_ids)[i] = NULL;
3346 silc_server_announce_get_channel_users(server, channel,
3348 channel_users_modes[i]);
3349 (*channel_ids)[i] = channel->id;
3352 if (!silc_idcache_list_next(list, &id_cache))
3356 *channel_users_modes_c += i;
3359 silc_idcache_list_free(list);
3363 /* This function is used to announce our existing channels to our router
3364 when we've connected to it. This also announces the users on the
3365 channels to the router. If the `creation_time' is non-zero only the
3366 channels that was created after the `creation_time' are announced.
3367 Note that the channel users are still announced even if the `creation_time'
3370 void silc_server_announce_channels(SilcServer server,
3371 unsigned long creation_time,
3372 SilcSocketConnection remote)
3374 SilcBuffer channels = NULL, channel_users = NULL;
3375 SilcBuffer *channel_users_modes = NULL;
3376 uint32 channel_users_modes_c = 0;
3377 SilcChannelID **channel_ids = NULL;
3379 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3381 /* Get channels and channel users in local list */
3382 silc_server_announce_get_channels(server, server->local_list,
3383 &channels, &channel_users,
3384 &channel_users_modes,
3385 &channel_users_modes_c,
3386 &channel_ids, creation_time);
3388 /* Get channels and channel users in global list */
3389 silc_server_announce_get_channels(server, server->global_list,
3390 &channels, &channel_users,
3391 &channel_users_modes,
3392 &channel_users_modes_c,
3393 &channel_ids, creation_time);
3396 silc_buffer_push(channels, channels->data - channels->head);
3397 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3399 /* Send the packet */
3400 silc_server_packet_send(server, remote,
3401 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3402 channels->data, channels->len,
3405 silc_buffer_free(channels);
3408 if (channel_users) {
3409 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3410 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3411 channel_users->len);
3413 /* Send the packet */
3414 silc_server_packet_send(server, remote,
3415 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3416 channel_users->data, channel_users->len,
3419 silc_buffer_free(channel_users);
3422 if (channel_users_modes) {
3425 for (i = 0; i < channel_users_modes_c; i++) {
3426 silc_buffer_push(channel_users_modes[i],
3427 channel_users_modes[i]->data -
3428 channel_users_modes[i]->head);
3429 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3430 channel_users_modes[i]->len);
3431 silc_server_packet_send_dest(server, remote,
3432 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3433 channel_ids[i], SILC_ID_CHANNEL,
3434 channel_users_modes[i]->data,
3435 channel_users_modes[i]->len,
3437 silc_buffer_free(channel_users_modes[i]);
3439 silc_free(channel_users_modes);
3440 silc_free(channel_ids);
3444 /* Failure timeout callback. If this is called then we will immediately
3445 process the received failure. We always process the failure with timeout
3446 since we do not want to blindly trust to received failure packets.
3447 This won't be called (the timeout is cancelled) if the failure was
3448 bogus (it is bogus if remote does not close the connection after sending
3451 SILC_TASK_CALLBACK(silc_server_failure_callback)
3453 SilcServerFailureContext f = (SilcServerFailureContext)context;
3455 if (f->sock->protocol) {
3456 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3457 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3463 /* Assembles user list and users mode list from the `channel'. */
3465 void silc_server_get_users_on_channel(SilcServer server,
3466 SilcChannelEntry channel,
3467 SilcBuffer *user_list,
3468 SilcBuffer *mode_list,
3471 SilcChannelClientEntry chl;
3472 SilcHashTableList htl;
3473 SilcBuffer client_id_list;
3474 SilcBuffer client_mode_list;
3476 uint32 list_count = 0, len = 0;
3478 silc_hash_table_list(channel->user_list, &htl);
3479 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3480 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3482 client_id_list = silc_buffer_alloc(len);
3484 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3485 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3486 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3488 silc_hash_table_list(channel->user_list, &htl);
3489 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3491 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3492 silc_buffer_put(client_id_list, idp->data, idp->len);
3493 silc_buffer_pull(client_id_list, idp->len);
3494 silc_buffer_free(idp);
3496 /* Client's mode on channel */
3497 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3498 silc_buffer_pull(client_mode_list, 4);
3502 silc_buffer_push(client_id_list,
3503 client_id_list->data - client_id_list->head);
3504 silc_buffer_push(client_mode_list,
3505 client_mode_list->data - client_mode_list->head);
3507 *user_list = client_id_list;
3508 *mode_list = client_mode_list;
3509 *user_count = list_count;
3512 /* Saves users and their modes to the `channel'. */
3514 void silc_server_save_users_on_channel(SilcServer server,
3515 SilcSocketConnection sock,
3516 SilcChannelEntry channel,
3517 SilcClientID *noadd,
3518 SilcBuffer user_list,
3519 SilcBuffer mode_list,
3524 for (i = 0; i < user_count; i++) {
3527 SilcClientID *client_id;
3528 SilcClientEntry client;
3531 SILC_GET16_MSB(idp_len, user_list->data + 2);
3533 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3534 silc_buffer_pull(user_list, idp_len);
3539 SILC_GET32_MSB(mode, mode_list->data);
3540 silc_buffer_pull(mode_list, 4);
3542 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3543 silc_free(client_id);
3547 /* Check if we have this client cached already. */
3548 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3549 server->server_type, NULL);
3551 client = silc_idlist_find_client_by_id(server->global_list,
3552 client_id, server->server_type,
3555 /* If router did not find such Client ID in its lists then this must
3556 be bogus client or some router in the net is buggy. */
3557 if (server->server_type == SILC_ROUTER) {
3558 silc_free(client_id);
3562 /* We don't have that client anywhere, add it. The client is added
3563 to global list since server didn't have it in the lists so it must be
3565 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3566 silc_id_dup(client_id, SILC_ID_CLIENT),
3567 sock->user_data, NULL);
3569 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3570 silc_free(client_id);
3574 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3577 silc_free(client_id);
3579 if (!silc_server_client_on_channel(client, channel)) {
3580 /* Client was not on the channel, add it. */
3581 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3582 chl->client = client;
3584 chl->channel = channel;
3585 silc_hash_table_add(channel->user_list, chl->client, chl);
3586 silc_hash_table_add(client->channels, chl->channel, chl);
3591 /* Lookups route to the client indicated by the `id_data'. The connection
3592 object and internal data object is returned. Returns NULL if route
3593 could not be found to the client. If the `client_id' is specified then
3594 it is used and the `id_data' is ignored. */
3596 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3597 unsigned char *id_data,
3599 SilcClientID *client_id,
3600 SilcIDListData *idata)
3603 SilcClientEntry client;
3605 SILC_LOG_DEBUG(("Start"));
3607 /* Decode destination Client ID */
3609 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3611 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3615 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3618 /* If the destination belongs to our server we don't have to route
3619 the packet anywhere but to send it to the local destination. */
3620 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3624 /* If we are router and the client has router then the client is in
3625 our cell but not directly connected to us. */
3626 if (server->server_type == SILC_ROUTER && client->router) {
3627 /* We are of course in this case the client's router thus the route
3628 to the client is the server who owns the client. So, we will send
3629 the packet to that server. */
3631 *idata = (SilcIDListData)client->router;
3632 return client->router->connection;
3635 /* Seems that client really is directly connected to us */
3637 *idata = (SilcIDListData)client;
3638 return client->connection;
3641 /* Destination belongs to someone not in this server. If we are normal
3642 server our action is to send the packet to our router. */
3643 if (server->server_type != SILC_ROUTER && !server->standalone) {
3646 *idata = (SilcIDListData)server->router;
3647 return server->router->connection;
3650 /* We are router and we will perform route lookup for the destination
3651 and send the packet to fastest route. */
3652 if (server->server_type == SILC_ROUTER && !server->standalone) {
3653 /* Check first that the ID is valid */
3654 client = silc_idlist_find_client_by_id(server->global_list, id,
3657 SilcSocketConnection dst_sock;
3659 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3663 *idata = (SilcIDListData)dst_sock->user_data;
3672 /* Encodes and returns channel list of channels the `client' has joined.
3673 Secret channels are not put to the list. */
3675 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3676 SilcClientEntry client)
3678 SilcBuffer buffer = NULL;
3679 SilcChannelEntry channel;
3680 SilcChannelClientEntry chl;
3681 SilcHashTableList htl;
3687 silc_hash_table_list(client->channels, &htl);
3688 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3689 channel = chl->channel;
3691 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3692 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3695 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3696 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3697 name_len = strlen(channel->channel_name);
3699 len = 4 + name_len + id_len + 4;
3700 buffer = silc_buffer_realloc(buffer,
3701 (buffer ? (buffer)->truelen + len : len));
3702 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3703 silc_buffer_format(buffer,
3704 SILC_STR_UI_SHORT(name_len),
3705 SILC_STR_UI_XNSTRING(channel->channel_name,
3707 SILC_STR_UI_SHORT(id_len),
3708 SILC_STR_UI_XNSTRING(cid, id_len),
3709 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3711 silc_buffer_pull(buffer, len);
3716 silc_buffer_push(buffer, buffer->data - buffer->head);
3721 /* Finds client entry by Client ID and if it is not found then resolves
3722 it using WHOIS command. */
3724 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3725 SilcClientID *client_id)
3727 SilcClientEntry client;
3729 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3732 client = silc_idlist_find_client_by_id(server->global_list,
3733 client_id, TRUE, NULL);
3734 if (!client && server->server_type == SILC_ROUTER)
3738 if (!client && server->standalone)
3741 if (!client || !client->nickname || !client->username) {
3742 SilcBuffer buffer, idp;
3744 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3745 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3746 client->resolve_cmd_ident = ++server->cmd_ident;
3748 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3749 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3750 server->cmd_ident, 1,
3751 3, idp->data, idp->len);
3752 silc_server_packet_send(server, client ? client->router->connection :
3753 server->router->connection,
3754 SILC_PACKET_COMMAND, 0,
3755 buffer->data, buffer->len, FALSE);
3756 silc_buffer_free(idp);
3757 silc_buffer_free(buffer);
3764 /* A timeout callback for the re-key. We will be the initiator of the
3767 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3769 SilcSocketConnection sock = (SilcSocketConnection)context;
3770 SilcIDListData idata = (SilcIDListData)sock->user_data;
3771 SilcServer server = (SilcServer)idata->rekey->context;
3772 SilcProtocol protocol;
3773 SilcServerRekeyInternalContext *proto_ctx;
3775 SILC_LOG_DEBUG(("Start"));
3777 /* Allocate internal protocol context. This is sent as context
3779 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3780 proto_ctx->server = (void *)server;
3781 proto_ctx->sock = sock;
3782 proto_ctx->responder = FALSE;
3783 proto_ctx->pfs = idata->rekey->pfs;
3785 /* Perform rekey protocol. Will call the final callback after the
3786 protocol is over. */
3787 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3788 &protocol, proto_ctx, silc_server_rekey_final);
3789 sock->protocol = protocol;
3791 /* Run the protocol */
3792 silc_protocol_execute(protocol, server->schedule, 0, 0);
3794 /* Re-register re-key timeout */
3795 silc_schedule_task_add(server->schedule, sock->sock,
3796 silc_server_rekey_callback,
3797 context, idata->rekey->timeout, 0,
3798 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3801 /* The final callback for the REKEY protocol. This will actually take the
3802 new key material into use. */
3804 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3806 SilcProtocol protocol = (SilcProtocol)context;
3807 SilcServerRekeyInternalContext *ctx =
3808 (SilcServerRekeyInternalContext *)protocol->context;
3809 SilcServer server = (SilcServer)ctx->server;
3810 SilcSocketConnection sock = ctx->sock;
3812 SILC_LOG_DEBUG(("Start"));
3814 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3815 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3816 /* Error occured during protocol */
3817 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3818 silc_protocol_cancel(protocol, server->schedule);
3819 silc_protocol_free(protocol);
3820 sock->protocol = NULL;
3822 silc_packet_context_free(ctx->packet);
3824 silc_ske_free(ctx->ske);
3829 /* Purge the outgoing data queue to assure that all rekey packets really
3830 go to the network before we quit the protocol. */
3831 silc_server_packet_queue_purge(server, sock);
3834 silc_protocol_free(protocol);
3835 sock->protocol = NULL;
3837 silc_packet_context_free(ctx->packet);
3839 silc_ske_free(ctx->ske);