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 bool 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 /* If protocol for this connection is key exchange or rekey then we'll
1664 process all packets synchronously, since there might be packets in
1665 queue that we are not able to decrypt without first processing the
1666 packets before them. */
1667 if (sock->protocol && sock->protocol->protocol &&
1668 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1669 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1670 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1673 /* Reprocess data since we'll return FALSE here. This is because
1674 the idata->receive_key might have become valid in the last packet
1675 and we want to call this processor with valid cipher. */
1677 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1678 TRUE : FALSE, idata->receive_key,
1679 idata->hmac_receive, idata->psn_receive,
1680 silc_server_packet_parse, server);
1682 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1683 TRUE : FALSE, NULL, NULL, 0,
1684 silc_server_packet_parse, server);
1688 switch (sock->type) {
1689 case SILC_SOCKET_TYPE_UNKNOWN:
1690 case SILC_SOCKET_TYPE_CLIENT:
1691 /* Parse the packet with timeout */
1692 silc_schedule_task_add(server->schedule, sock->sock,
1693 silc_server_packet_parse_real,
1694 (void *)parser_context, 0, 100000,
1696 SILC_TASK_PRI_NORMAL);
1698 case SILC_SOCKET_TYPE_SERVER:
1699 case SILC_SOCKET_TYPE_ROUTER:
1700 /* Packets from servers are parsed immediately */
1701 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1711 /* Parses the packet type and calls what ever routines the packet type
1712 requires. This is done for all incoming packets. */
1714 void silc_server_packet_parse_type(SilcServer server,
1715 SilcSocketConnection sock,
1716 SilcPacketContext *packet)
1718 SilcPacketType type = packet->type;
1719 SilcIDListData idata = (SilcIDListData)sock->user_data;
1721 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1723 /* Parse the packet type */
1725 case SILC_PACKET_DISCONNECT:
1726 SILC_LOG_DEBUG(("Disconnect packet"));
1727 if (packet->flags & SILC_PACKET_FLAG_LIST)
1731 case SILC_PACKET_SUCCESS:
1733 * Success received for something. For now we can have only
1734 * one protocol for connection executing at once hence this
1735 * success message is for whatever protocol is executing currently.
1737 SILC_LOG_DEBUG(("Success packet"));
1738 if (packet->flags & SILC_PACKET_FLAG_LIST)
1741 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1744 case SILC_PACKET_FAILURE:
1746 * Failure received for something. For now we can have only
1747 * one protocol for connection executing at once hence this
1748 * failure message is for whatever protocol is executing currently.
1750 SILC_LOG_DEBUG(("Failure packet"));
1751 if (packet->flags & SILC_PACKET_FLAG_LIST)
1753 if (sock->protocol) {
1754 SilcServerFailureContext f;
1755 f = silc_calloc(1, sizeof(*f));
1759 /* We will wait 5 seconds to process this failure packet */
1760 silc_schedule_task_add(server->schedule, sock->sock,
1761 silc_server_failure_callback, (void *)f, 5, 0,
1762 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1766 case SILC_PACKET_REJECT:
1767 SILC_LOG_DEBUG(("Reject packet"));
1768 if (packet->flags & SILC_PACKET_FLAG_LIST)
1773 case SILC_PACKET_NOTIFY:
1775 * Received notify packet. Server can receive notify packets from
1776 * router. Server then relays the notify messages to clients if needed.
1778 SILC_LOG_DEBUG(("Notify packet"));
1779 if (packet->flags & SILC_PACKET_FLAG_LIST)
1780 silc_server_notify_list(server, sock, packet);
1782 silc_server_notify(server, sock, packet);
1788 case SILC_PACKET_CHANNEL_MESSAGE:
1790 * Received channel message. Channel messages are special packets
1791 * (although probably most common ones) thus they are handled
1794 SILC_LOG_DEBUG(("Channel Message packet"));
1795 if (packet->flags & SILC_PACKET_FLAG_LIST)
1797 idata->last_receive = time(NULL);
1798 silc_server_channel_message(server, sock, packet);
1801 case SILC_PACKET_CHANNEL_KEY:
1803 * Received key for channel. As channels are created by the router
1804 * the keys are as well. We will distribute the key to all of our
1805 * locally connected clients on the particular channel. Router
1806 * never receives this channel and thus is ignored.
1808 SILC_LOG_DEBUG(("Channel Key packet"));
1809 if (packet->flags & SILC_PACKET_FLAG_LIST)
1811 silc_server_channel_key(server, sock, packet);
1817 case SILC_PACKET_COMMAND:
1819 * Recived command. Processes the command request and allocates the
1820 * command context and calls the command.
1822 SILC_LOG_DEBUG(("Command packet"));
1823 if (packet->flags & SILC_PACKET_FLAG_LIST)
1825 silc_server_command_process(server, sock, packet);
1828 case SILC_PACKET_COMMAND_REPLY:
1830 * Received command reply packet. Received command reply to command. It
1831 * may be reply to command sent by us or reply to command sent by client
1832 * that we've routed further.
1834 SILC_LOG_DEBUG(("Command Reply packet"));
1835 if (packet->flags & SILC_PACKET_FLAG_LIST)
1837 silc_server_command_reply(server, sock, packet);
1841 * Private Message packets
1843 case SILC_PACKET_PRIVATE_MESSAGE:
1845 * Received private message packet. The packet is coming from either
1848 SILC_LOG_DEBUG(("Private Message packet"));
1849 if (packet->flags & SILC_PACKET_FLAG_LIST)
1851 idata->last_receive = time(NULL);
1852 silc_server_private_message(server, sock, packet);
1855 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1857 * Private message key packet.
1859 if (packet->flags & SILC_PACKET_FLAG_LIST)
1861 silc_server_private_message_key(server, sock, packet);
1865 * Key Exchange protocol packets
1867 case SILC_PACKET_KEY_EXCHANGE:
1868 SILC_LOG_DEBUG(("KE packet"));
1869 if (packet->flags & SILC_PACKET_FLAG_LIST)
1872 if (sock->protocol && sock->protocol->protocol &&
1873 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1875 SilcServerKEInternalContext *proto_ctx =
1876 (SilcServerKEInternalContext *)sock->protocol->context;
1878 proto_ctx->packet = silc_packet_context_dup(packet);
1880 /* Let the protocol handle the packet */
1881 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1883 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1884 "protocol active, packet dropped."));
1888 case SILC_PACKET_KEY_EXCHANGE_1:
1889 SILC_LOG_DEBUG(("KE 1 packet"));
1890 if (packet->flags & SILC_PACKET_FLAG_LIST)
1893 if (sock->protocol && sock->protocol->protocol &&
1894 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1895 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1897 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1898 SilcServerRekeyInternalContext *proto_ctx =
1899 (SilcServerRekeyInternalContext *)sock->protocol->context;
1901 if (proto_ctx->packet)
1902 silc_packet_context_free(proto_ctx->packet);
1904 proto_ctx->packet = silc_packet_context_dup(packet);
1906 /* Let the protocol handle the packet */
1907 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1909 SilcServerKEInternalContext *proto_ctx =
1910 (SilcServerKEInternalContext *)sock->protocol->context;
1912 if (proto_ctx->packet)
1913 silc_packet_context_free(proto_ctx->packet);
1915 proto_ctx->packet = silc_packet_context_dup(packet);
1916 proto_ctx->dest_id_type = packet->src_id_type;
1917 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1918 packet->src_id_type);
1919 if (!proto_ctx->dest_id)
1922 /* Let the protocol handle the packet */
1923 silc_protocol_execute(sock->protocol, server->schedule,
1927 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1928 "protocol active, packet dropped."));
1932 case SILC_PACKET_KEY_EXCHANGE_2:
1933 SILC_LOG_DEBUG(("KE 2 packet"));
1934 if (packet->flags & SILC_PACKET_FLAG_LIST)
1937 if (sock->protocol && sock->protocol->protocol &&
1938 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1939 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1941 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1942 SilcServerRekeyInternalContext *proto_ctx =
1943 (SilcServerRekeyInternalContext *)sock->protocol->context;
1945 if (proto_ctx->packet)
1946 silc_packet_context_free(proto_ctx->packet);
1948 proto_ctx->packet = silc_packet_context_dup(packet);
1950 /* Let the protocol handle the packet */
1951 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1953 SilcServerKEInternalContext *proto_ctx =
1954 (SilcServerKEInternalContext *)sock->protocol->context;
1956 if (proto_ctx->packet)
1957 silc_packet_context_free(proto_ctx->packet);
1959 proto_ctx->packet = silc_packet_context_dup(packet);
1960 proto_ctx->dest_id_type = packet->src_id_type;
1961 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1962 packet->src_id_type);
1963 if (!proto_ctx->dest_id)
1966 /* Let the protocol handle the packet */
1967 silc_protocol_execute(sock->protocol, server->schedule,
1971 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1972 "protocol active, packet dropped."));
1976 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1978 * Connection authentication request packet. When we receive this packet
1979 * we will send to the other end information about our mandatory
1980 * authentication method for the connection. This packet maybe received
1983 SILC_LOG_DEBUG(("Connection authentication request packet"));
1984 if (packet->flags & SILC_PACKET_FLAG_LIST)
1986 silc_server_connection_auth_request(server, sock, packet);
1990 * Connection Authentication protocol packets
1992 case SILC_PACKET_CONNECTION_AUTH:
1993 /* Start of the authentication protocol. We receive here the
1994 authentication data and will verify it. */
1995 SILC_LOG_DEBUG(("Connection auth packet"));
1996 if (packet->flags & SILC_PACKET_FLAG_LIST)
1999 if (sock->protocol && sock->protocol->protocol->type
2000 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2002 SilcServerConnAuthInternalContext *proto_ctx =
2003 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2005 proto_ctx->packet = silc_packet_context_dup(packet);
2007 /* Let the protocol handle the packet */
2008 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2010 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2011 "protocol active, packet dropped."));
2015 case SILC_PACKET_NEW_ID:
2017 * Received New ID packet. This includes some new ID that has been
2018 * created. It may be for client, server or channel. This is the way
2019 * to distribute information about new registered entities in the
2022 SILC_LOG_DEBUG(("New ID packet"));
2023 if (packet->flags & SILC_PACKET_FLAG_LIST)
2024 silc_server_new_id_list(server, sock, packet);
2026 silc_server_new_id(server, sock, packet);
2029 case SILC_PACKET_NEW_CLIENT:
2031 * Received new client packet. This includes client information that
2032 * we will use to create initial client ID. After creating new
2033 * ID we will send it to the client.
2035 SILC_LOG_DEBUG(("New Client packet"));
2036 if (packet->flags & SILC_PACKET_FLAG_LIST)
2038 silc_server_new_client(server, sock, packet);
2041 case SILC_PACKET_NEW_SERVER:
2043 * Received new server packet. This includes Server ID and some other
2044 * information that we may save. This is received after server has
2047 SILC_LOG_DEBUG(("New Server packet"));
2048 if (packet->flags & SILC_PACKET_FLAG_LIST)
2050 silc_server_new_server(server, sock, packet);
2053 case SILC_PACKET_NEW_CHANNEL:
2055 * Received new channel packet. Information about new channel in the
2056 * network are distributed using this packet.
2058 SILC_LOG_DEBUG(("New Channel packet"));
2059 if (packet->flags & SILC_PACKET_FLAG_LIST)
2060 silc_server_new_channel_list(server, sock, packet);
2062 silc_server_new_channel(server, sock, packet);
2065 case SILC_PACKET_HEARTBEAT:
2067 * Received heartbeat.
2069 SILC_LOG_DEBUG(("Heartbeat packet"));
2070 if (packet->flags & SILC_PACKET_FLAG_LIST)
2074 case SILC_PACKET_KEY_AGREEMENT:
2076 * Received heartbeat.
2078 SILC_LOG_DEBUG(("Key agreement packet"));
2079 if (packet->flags & SILC_PACKET_FLAG_LIST)
2081 silc_server_key_agreement(server, sock, packet);
2084 case SILC_PACKET_REKEY:
2086 * Received re-key packet. The sender wants to regenerate the session
2089 SILC_LOG_DEBUG(("Re-key packet"));
2090 if (packet->flags & SILC_PACKET_FLAG_LIST)
2092 silc_server_rekey(server, sock, packet);
2095 case SILC_PACKET_REKEY_DONE:
2097 * The re-key is done.
2099 SILC_LOG_DEBUG(("Re-key done packet"));
2100 if (packet->flags & SILC_PACKET_FLAG_LIST)
2103 if (sock->protocol && sock->protocol->protocol &&
2104 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2106 SilcServerRekeyInternalContext *proto_ctx =
2107 (SilcServerRekeyInternalContext *)sock->protocol->context;
2109 if (proto_ctx->packet)
2110 silc_packet_context_free(proto_ctx->packet);
2112 proto_ctx->packet = silc_packet_context_dup(packet);
2114 /* Let the protocol handle the packet */
2115 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2117 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2118 "protocol active, packet dropped."));
2122 case SILC_PACKET_FTP:
2124 SILC_LOG_DEBUG(("FTP packet"));
2125 if (packet->flags & SILC_PACKET_FLAG_LIST)
2127 silc_server_ftp(server, sock, packet);
2130 case SILC_PACKET_RESUME_ROUTER:
2131 /* Resume router packet received. This packet is received for backup
2132 router resuming protocol. */
2133 SILC_LOG_DEBUG(("Resume router packet"));
2134 if (packet->flags & SILC_PACKET_FLAG_LIST)
2136 silc_server_backup_resume_router(server, sock, packet);
2140 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2146 /* Creates connection to a remote router. */
2148 void silc_server_create_connection(SilcServer server,
2149 char *remote_host, uint32 port)
2151 SilcServerConnection sconn;
2153 /* Allocate connection object for hold connection specific stuff. */
2154 sconn = silc_calloc(1, sizeof(*sconn));
2155 sconn->server = server;
2156 sconn->remote_host = strdup(remote_host);
2157 sconn->remote_port = port;
2159 silc_schedule_task_add(server->schedule, 0,
2160 silc_server_connect_router,
2161 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2162 SILC_TASK_PRI_NORMAL);
2165 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2167 silc_socket_free((SilcSocketConnection)context);
2170 /* Closes connection to socket connection */
2172 void silc_server_close_connection(SilcServer server,
2173 SilcSocketConnection sock)
2175 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2177 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2178 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2179 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2182 /* We won't listen for this connection anymore */
2183 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2185 /* Unregister all tasks */
2186 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2188 /* Close the actual connection */
2189 silc_net_close_connection(sock->sock);
2190 server->sockets[sock->sock] = NULL;
2192 /* If sock->user_data is NULL then we'll check for active protocols
2193 here since the silc_server_free_sock_user_data has not been called
2194 for this connection. */
2195 if (!sock->user_data) {
2196 /* If any protocol is active cancel its execution. It will call
2197 the final callback which will finalize the disconnection. */
2198 if (sock->protocol) {
2199 silc_protocol_cancel(sock->protocol, server->schedule);
2200 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2201 silc_protocol_execute_final(sock->protocol, server->schedule);
2202 sock->protocol = NULL;
2207 silc_schedule_task_add(server->schedule, 0,
2208 silc_server_close_connection_final,
2209 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2210 SILC_TASK_PRI_NORMAL);
2213 /* Sends disconnect message to remote connection and disconnects the
2216 void silc_server_disconnect_remote(SilcServer server,
2217 SilcSocketConnection sock,
2218 const char *fmt, ...)
2221 unsigned char buf[4096];
2226 memset(buf, 0, sizeof(buf));
2228 vsprintf(buf, fmt, ap);
2231 SILC_LOG_DEBUG(("Disconnecting remote host"));
2233 /* Notify remote end that the conversation is over. The notify message
2234 is tried to be sent immediately. */
2235 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2236 buf, strlen(buf), TRUE);
2238 /* Mark the connection to be disconnected */
2239 SILC_SET_DISCONNECTED(sock);
2240 silc_server_close_connection(server, sock);
2245 SilcClientEntry client;
2246 } *FreeClientInternal;
2248 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2250 FreeClientInternal i = (FreeClientInternal)context;
2252 silc_idlist_del_data(i->client);
2253 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2257 /* Frees client data and notifies about client's signoff. */
2259 void silc_server_free_client_data(SilcServer server,
2260 SilcSocketConnection sock,
2261 SilcClientEntry client,
2265 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2267 /* If there is pending outgoing data for the client then purge it
2268 to the network before removing the client entry. */
2269 silc_server_packet_queue_purge(server, sock);
2274 /* Send SIGNOFF notify to routers. */
2275 if (notify && !server->standalone && server->router)
2276 silc_server_send_notify_signoff(server, server->router->connection,
2277 server->server_type == SILC_SERVER ?
2278 FALSE : TRUE, client->id, signoff);
2280 /* Remove client from all channels */
2282 silc_server_remove_from_channels(server, NULL, client,
2283 TRUE, signoff, TRUE);
2285 silc_server_remove_from_channels(server, NULL, client,
2286 FALSE, NULL, FALSE);
2288 /* We will not delete the client entry right away. We will take it
2289 into history (for WHOWAS command) for 5 minutes */
2292 silc_schedule_task_add(server->schedule, 0,
2293 silc_server_free_client_data_timeout,
2295 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2296 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2297 client->router = NULL;
2298 client->connection = NULL;
2300 /* Free the client entry and everything in it */
2301 server->stat.my_clients--;
2302 server->stat.clients--;
2303 if (server->server_type == SILC_ROUTER)
2304 server->stat.cell_clients--;
2307 /* Frees user_data pointer from socket connection object. This also sends
2308 appropriate notify packets to the network to inform about leaving
2311 void silc_server_free_sock_user_data(SilcServer server,
2312 SilcSocketConnection sock)
2314 SILC_LOG_DEBUG(("Start"));
2316 switch (sock->type) {
2317 case SILC_SOCKET_TYPE_CLIENT:
2319 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2320 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2323 case SILC_SOCKET_TYPE_SERVER:
2324 case SILC_SOCKET_TYPE_ROUTER:
2326 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2327 SilcServerEntry backup_router = NULL;
2330 backup_router = silc_server_backup_get(server, user_data->id);
2332 /* If this was our primary router connection then we're lost to
2333 the outside world. */
2334 if (server->router == user_data) {
2335 /* Check whether we have a backup router connection */
2336 if (!backup_router || backup_router == user_data) {
2337 silc_schedule_task_add(server->schedule, 0,
2338 silc_server_connect_to_router,
2341 SILC_TASK_PRI_NORMAL);
2343 server->id_entry->router = NULL;
2344 server->router = NULL;
2345 server->standalone = TRUE;
2346 backup_router = NULL;
2348 SILC_LOG_INFO(("New primary router is backup router %s",
2349 backup_router->server_name));
2350 SILC_LOG_DEBUG(("New primary router is backup router %s",
2351 backup_router->server_name));
2352 server->id_entry->router = backup_router;
2353 server->router = backup_router;
2354 server->router_connect = time(0);
2355 server->backup_primary = TRUE;
2356 if (server->server_type == SILC_BACKUP_ROUTER) {
2357 server->server_type = SILC_ROUTER;
2359 /* We'll need to constantly try to reconnect to the primary
2360 router so that we'll see when it comes back online. */
2361 silc_server_backup_reconnect(server, sock->ip, sock->port,
2362 silc_server_backup_connected,
2366 /* Mark this connection as replaced */
2367 silc_server_backup_replaced_add(server, user_data->id,
2370 } else if (backup_router) {
2371 SILC_LOG_INFO(("Enabling the use of backup router %s",
2372 backup_router->server_name));
2373 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2374 backup_router->server_name));
2376 /* Mark this connection as replaced */
2377 silc_server_backup_replaced_add(server, user_data->id,
2381 if (!backup_router) {
2382 /* Free all client entries that this server owns as they will
2383 become invalid now as well. */
2385 silc_server_remove_clients_by_server(server, user_data, TRUE);
2387 /* Update the client entries of this server to the new backup
2388 router. This also removes the clients that *really* was owned
2389 by the primary router and went down with the router. */
2390 silc_server_update_clients_by_server(server, user_data, backup_router,
2392 silc_server_update_servers_by_server(server, user_data, backup_router);
2395 /* Free the server entry */
2396 silc_server_backup_del(server, user_data);
2397 silc_server_backup_replaced_del(server, user_data);
2398 silc_idlist_del_data(user_data);
2399 if (!silc_idlist_del_server(server->local_list, user_data))
2400 silc_idlist_del_server(server->global_list, user_data);
2401 server->stat.my_servers--;
2402 server->stat.servers--;
2403 if (server->server_type == SILC_ROUTER)
2404 server->stat.cell_servers--;
2406 if (backup_router) {
2407 /* Announce all of our stuff that was created about 5 minutes ago.
2408 The backup router knows all the other stuff already. */
2409 if (server->server_type == SILC_ROUTER)
2410 silc_server_announce_servers(server, FALSE, time(0) - 300,
2411 backup_router->connection);
2413 /* Announce our clients and channels to the router */
2414 silc_server_announce_clients(server, time(0) - 300,
2415 backup_router->connection);
2416 silc_server_announce_channels(server, time(0) - 300,
2417 backup_router->connection);
2423 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2425 silc_idlist_del_data(user_data);
2426 silc_free(user_data);
2431 /* If any protocol is active cancel its execution */
2432 if (sock->protocol) {
2433 silc_protocol_cancel(sock->protocol, server->schedule);
2434 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2435 silc_protocol_execute_final(sock->protocol, server->schedule);
2436 sock->protocol = NULL;
2439 sock->user_data = NULL;
2442 /* Removes client from all channels it has joined. This is used when client
2443 connection is disconnected. If the client on a channel is last, the
2444 channel is removed as well. This sends the SIGNOFF notify types. */
2446 void silc_server_remove_from_channels(SilcServer server,
2447 SilcSocketConnection sock,
2448 SilcClientEntry client,
2450 char *signoff_message,
2453 SilcChannelEntry channel;
2454 SilcChannelClientEntry chl;
2455 SilcHashTableList htl;
2458 SILC_LOG_DEBUG(("Start"));
2460 if (!client || !client->id)
2463 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2465 /* Remove the client from all channels. The client is removed from
2466 the channels' user list. */
2467 silc_hash_table_list(client->channels, &htl);
2468 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2469 channel = chl->channel;
2471 /* Remove channel from client's channel list */
2472 silc_hash_table_del(client->channels, channel);
2474 /* Remove channel if there is no users anymore */
2475 if (server->server_type == SILC_ROUTER &&
2476 silc_hash_table_count(channel->user_list) < 2) {
2478 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2479 if (silc_idlist_del_channel(server->local_list, channel))
2480 server->stat.my_channels--;
2482 silc_idlist_del_channel(server->global_list, channel);
2486 /* Remove client from channel's client list */
2487 silc_hash_table_del(channel->user_list, chl->client);
2489 /* If there is no global users on the channel anymore mark the channel
2490 as local channel. Do not check if the removed client is local client. */
2491 if (server->server_type != SILC_ROUTER && channel->global_users &&
2492 chl->client->router && !silc_server_channel_has_global(channel))
2493 channel->global_users = FALSE;
2496 server->stat.my_chanclients--;
2498 /* If there is not at least one local user on the channel then we don't
2499 need the channel entry anymore, we can remove it safely. */
2500 if (server->server_type != SILC_ROUTER &&
2501 !silc_server_channel_has_local(channel)) {
2502 /* Notify about leaving client if this channel has global users. */
2503 if (notify && channel->global_users)
2504 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2505 SILC_NOTIFY_TYPE_SIGNOFF,
2506 signoff_message ? 2 : 1,
2507 clidp->data, clidp->len,
2508 signoff_message, signoff_message ?
2509 strlen(signoff_message) : 0);
2512 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2514 if (channel->founder_key) {
2515 /* The founder auth data exists, do not remove the channel entry */
2516 SilcChannelClientEntry chl2;
2517 SilcHashTableList htl2;
2521 silc_hash_table_list(channel->user_list, &htl2);
2522 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2523 silc_hash_table_del(chl2->client->channels, channel);
2524 silc_hash_table_del(channel->user_list, chl2->client);
2530 /* Remove the channel entry */
2531 if (silc_idlist_del_channel(server->local_list, channel))
2532 server->stat.my_channels--;
2534 silc_idlist_del_channel(server->global_list, channel);
2538 /* Send notify to channel about client leaving SILC and thus
2539 the entire channel. */
2541 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2542 SILC_NOTIFY_TYPE_SIGNOFF,
2543 signoff_message ? 2 : 1,
2544 clidp->data, clidp->len,
2545 signoff_message, signoff_message ?
2546 strlen(signoff_message) : 0);
2548 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2549 /* Re-generate channel key */
2550 if (!silc_server_create_channel_key(server, channel, 0))
2553 /* Send the channel key to the channel. The key of course is not sent
2554 to the client who was removed from the channel. */
2555 silc_server_send_channel_key(server, client->connection, channel,
2556 server->server_type == SILC_ROUTER ?
2557 FALSE : !server->standalone);
2561 silc_buffer_free(clidp);
2564 /* Removes client from one channel. This is used for example when client
2565 calls LEAVE command to remove itself from the channel. Returns TRUE
2566 if channel still exists and FALSE if the channel is removed when
2567 last client leaves the channel. If `notify' is FALSE notify messages
2570 int silc_server_remove_from_one_channel(SilcServer server,
2571 SilcSocketConnection sock,
2572 SilcChannelEntry channel,
2573 SilcClientEntry client,
2576 SilcChannelClientEntry chl;
2579 SILC_LOG_DEBUG(("Start"));
2581 /* Get the entry to the channel, if this client is not on the channel
2583 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2586 /* Remove the client from the channel. The client is removed from
2587 the channel's user list. */
2589 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2591 /* Remove channel from client's channel list */
2592 silc_hash_table_del(client->channels, chl->channel);
2594 /* Remove channel if there is no users anymore */
2595 if (server->server_type == SILC_ROUTER &&
2596 silc_hash_table_count(channel->user_list) < 2) {
2598 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2599 if (silc_idlist_del_channel(server->local_list, channel))
2600 server->stat.my_channels--;
2602 silc_idlist_del_channel(server->global_list, channel);
2603 silc_buffer_free(clidp);
2607 /* Remove client from channel's client list */
2608 silc_hash_table_del(channel->user_list, chl->client);
2610 /* If there is no global users on the channel anymore mark the channel
2611 as local channel. Do not check if the client is local client. */
2612 if (server->server_type != SILC_ROUTER && channel->global_users &&
2613 chl->client->router && !silc_server_channel_has_global(channel))
2614 channel->global_users = FALSE;
2617 server->stat.my_chanclients--;
2619 /* If there is not at least one local user on the channel then we don't
2620 need the channel entry anymore, we can remove it safely. */
2621 if (server->server_type != SILC_ROUTER &&
2622 !silc_server_channel_has_local(channel)) {
2623 /* Notify about leaving client if this channel has global users. */
2624 if (notify && channel->global_users)
2625 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2626 SILC_NOTIFY_TYPE_LEAVE, 1,
2627 clidp->data, clidp->len);
2629 silc_buffer_free(clidp);
2632 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2634 if (channel->founder_key) {
2635 /* The founder auth data exists, do not remove the channel entry */
2636 SilcChannelClientEntry chl2;
2637 SilcHashTableList htl2;
2641 silc_hash_table_list(channel->user_list, &htl2);
2642 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2643 silc_hash_table_del(chl2->client->channels, channel);
2644 silc_hash_table_del(channel->user_list, chl2->client);
2650 /* Remove the channel entry */
2651 if (silc_idlist_del_channel(server->local_list, channel))
2652 server->stat.my_channels--;
2654 silc_idlist_del_channel(server->global_list, channel);
2658 /* Send notify to channel about client leaving the channel */
2660 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2661 SILC_NOTIFY_TYPE_LEAVE, 1,
2662 clidp->data, clidp->len);
2664 silc_buffer_free(clidp);
2668 /* Timeout callback. This is called if connection is idle or for some
2669 other reason is not responding within some period of time. This
2670 disconnects the remote end. */
2672 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2674 SilcServer server = (SilcServer)context;
2675 SilcSocketConnection sock = server->sockets[fd];
2677 SILC_LOG_DEBUG(("Start"));
2682 /* If we have protocol active we must assure that we call the protocol's
2683 final callback so that all the memory is freed. */
2684 if (sock->protocol) {
2685 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2686 silc_protocol_execute_final(sock->protocol, server->schedule);
2690 if (sock->user_data)
2691 silc_server_free_sock_user_data(server, sock);
2693 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2694 "Connection timeout");
2697 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2698 function may be used only by router. In real SILC network all channels
2699 are created by routers thus this function is never used by normal
2702 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2703 SilcServerID *router_id,
2709 SilcChannelID *channel_id;
2710 SilcChannelEntry entry;
2714 SILC_LOG_DEBUG(("Creating new channel"));
2717 cipher = SILC_DEFAULT_CIPHER;
2719 hmac = SILC_DEFAULT_HMAC;
2721 /* Allocate cipher */
2722 if (!silc_cipher_alloc(cipher, &key))
2726 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2727 silc_cipher_free(key);
2731 channel_name = strdup(channel_name);
2733 /* Create the channel */
2734 if (!silc_id_create_channel_id(server, router_id, server->rng,
2736 silc_free(channel_name);
2737 silc_cipher_free(key);
2738 silc_hmac_free(newhmac);
2741 entry = silc_idlist_add_channel(server->local_list, channel_name,
2742 SILC_CHANNEL_MODE_NONE, channel_id,
2743 NULL, key, newhmac);
2745 silc_free(channel_name);
2746 silc_cipher_free(key);
2747 silc_hmac_free(newhmac);
2751 entry->cipher = strdup(cipher);
2752 entry->hmac_name = strdup(hmac);
2754 /* Now create the actual key material */
2755 if (!silc_server_create_channel_key(server, entry,
2756 silc_cipher_get_key_len(key) / 8)) {
2757 silc_free(channel_name);
2758 silc_cipher_free(key);
2759 silc_hmac_free(newhmac);
2760 silc_free(entry->cipher);
2761 silc_free(entry->hmac_name);
2765 /* Notify other routers about the new channel. We send the packet
2766 to our primary route. */
2767 if (broadcast && server->standalone == FALSE)
2768 silc_server_send_new_channel(server, server->router->connection, TRUE,
2769 channel_name, entry->id,
2770 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2773 server->stat.my_channels++;
2778 /* Same as above but creates the channel with Channel ID `channel_id. */
2781 silc_server_create_new_channel_with_id(SilcServer server,
2785 SilcChannelID *channel_id,
2788 SilcChannelEntry entry;
2792 SILC_LOG_DEBUG(("Creating new channel"));
2795 cipher = SILC_DEFAULT_CIPHER;
2797 hmac = SILC_DEFAULT_HMAC;
2799 /* Allocate cipher */
2800 if (!silc_cipher_alloc(cipher, &key))
2804 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2805 silc_cipher_free(key);
2809 channel_name = strdup(channel_name);
2811 /* Create the channel */
2812 entry = silc_idlist_add_channel(server->local_list, channel_name,
2813 SILC_CHANNEL_MODE_NONE, channel_id,
2814 NULL, key, newhmac);
2816 silc_free(channel_name);
2820 /* Now create the actual key material */
2821 if (!silc_server_create_channel_key(server, entry,
2822 silc_cipher_get_key_len(key) / 8)) {
2823 silc_free(channel_name);
2827 /* Notify other routers about the new channel. We send the packet
2828 to our primary route. */
2829 if (broadcast && server->standalone == FALSE)
2830 silc_server_send_new_channel(server, server->router->connection, TRUE,
2831 channel_name, entry->id,
2832 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2835 server->stat.my_channels++;
2840 /* Channel's key re-key timeout callback. */
2842 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2844 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2845 SilcServer server = (SilcServer)rekey->context;
2849 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2852 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2855 /* Generates new channel key. This is used to create the initial channel key
2856 but also to re-generate new key for channel. If `key_len' is provided
2857 it is the bytes of the key length. */
2859 bool silc_server_create_channel_key(SilcServer server,
2860 SilcChannelEntry channel,
2864 unsigned char channel_key[32], hash[32];
2867 SILC_LOG_DEBUG(("Generating channel key"));
2869 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2870 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2874 if (!channel->channel_key)
2875 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2880 else if (channel->key_len)
2881 len = channel->key_len / 8;
2883 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2885 /* Create channel key */
2886 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2889 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2891 /* Remove old key if exists */
2893 memset(channel->key, 0, channel->key_len / 8);
2894 silc_free(channel->key);
2898 channel->key_len = len * 8;
2899 channel->key = silc_calloc(len, sizeof(*channel->key));
2900 memcpy(channel->key, channel_key, len);
2901 memset(channel_key, 0, sizeof(channel_key));
2903 /* Generate HMAC key from the channel key data and set it */
2905 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2906 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2907 silc_hmac_set_key(channel->hmac, hash,
2908 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2909 memset(hash, 0, sizeof(hash));
2911 if (server->server_type == SILC_ROUTER) {
2912 if (!channel->rekey)
2913 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2914 channel->rekey->context = (void *)server;
2915 channel->rekey->channel = channel;
2916 channel->rekey->key_len = key_len;
2917 if (channel->rekey->task)
2918 silc_schedule_task_del(server->schedule, channel->rekey->task);
2920 channel->rekey->task =
2921 silc_schedule_task_add(server->schedule, 0,
2922 silc_server_channel_key_rekey,
2923 (void *)channel->rekey, 3600, 0,
2925 SILC_TASK_PRI_NORMAL);
2931 /* Saves the channel key found in the encoded `key_payload' buffer. This
2932 function is used when we receive Channel Key Payload and also when we're
2933 processing JOIN command reply. Returns entry to the channel. */
2935 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2936 SilcBuffer key_payload,
2937 SilcChannelEntry channel)
2939 SilcChannelKeyPayload payload = NULL;
2940 SilcChannelID *id = NULL;
2941 unsigned char *tmp, hash[32];
2945 SILC_LOG_DEBUG(("Start"));
2947 /* Decode channel key payload */
2948 payload = silc_channel_key_payload_parse(key_payload);
2950 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2955 /* Get the channel entry */
2958 /* Get channel ID */
2959 tmp = silc_channel_key_get_id(payload, &tmp_len);
2960 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2966 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2968 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2970 SILC_LOG_ERROR(("Received key for non-existent channel"));
2976 tmp = silc_channel_key_get_key(payload, &tmp_len);
2982 cipher = silc_channel_key_get_cipher(payload, NULL);
2988 /* Remove old key if exists */
2990 memset(channel->key, 0, channel->key_len / 8);
2991 silc_free(channel->key);
2992 silc_cipher_free(channel->channel_key);
2995 /* Create new cipher */
2996 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3001 if (channel->cipher)
3002 silc_free(channel->cipher);
3003 channel->cipher = strdup(cipher);
3006 channel->key_len = tmp_len * 8;
3007 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3008 memcpy(channel->key, tmp, tmp_len);
3009 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3011 /* Generate HMAC key from the channel key data and set it */
3013 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3014 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3015 silc_hmac_set_key(channel->hmac, hash,
3016 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3018 memset(hash, 0, sizeof(hash));
3019 memset(tmp, 0, tmp_len);
3021 if (server->server_type == SILC_ROUTER) {
3022 if (!channel->rekey)
3023 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3024 channel->rekey->context = (void *)server;
3025 channel->rekey->channel = channel;
3026 if (channel->rekey->task)
3027 silc_schedule_task_del(server->schedule, channel->rekey->task);
3029 channel->rekey->task =
3030 silc_schedule_task_add(server->schedule, 0,
3031 silc_server_channel_key_rekey,
3032 (void *)channel->rekey, 3600, 0,
3034 SILC_TASK_PRI_NORMAL);
3040 silc_channel_key_payload_free(payload);
3045 /* Heartbeat callback. This function is set as argument for the
3046 silc_socket_set_heartbeat function. The library will call this function
3047 at the set time interval. */
3049 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3052 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3054 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3057 /* Send the heartbeat */
3058 silc_server_send_heartbeat(hb->server, sock);
3061 /* Returns assembled of all servers in the given ID list. The packet's
3062 form is dictated by the New ID payload. */
3064 static void silc_server_announce_get_servers(SilcServer server,
3065 SilcServerEntry remote,
3067 SilcBuffer *servers,
3068 unsigned long creation_time)
3070 SilcIDCacheList list;
3071 SilcIDCacheEntry id_cache;
3072 SilcServerEntry entry;
3075 /* Go through all clients in the list */
3076 if (silc_idcache_get_all(id_list->servers, &list)) {
3077 if (silc_idcache_list_first(list, &id_cache)) {
3079 entry = (SilcServerEntry)id_cache->context;
3081 /* Do not announce the one we've sending our announcements and
3082 do not announce ourself. Also check the creation time if it's
3084 if ((entry == remote) || (entry == server->id_entry) ||
3085 (creation_time && entry->data.created < creation_time)) {
3086 if (!silc_idcache_list_next(list, &id_cache))
3091 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3093 *servers = silc_buffer_realloc(*servers,
3095 (*servers)->truelen + idp->len :
3097 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3098 silc_buffer_put(*servers, idp->data, idp->len);
3099 silc_buffer_pull(*servers, idp->len);
3100 silc_buffer_free(idp);
3102 if (!silc_idcache_list_next(list, &id_cache))
3107 silc_idcache_list_free(list);
3111 /* This function is used by router to announce existing servers to our
3112 primary router when we've connected to it. If `creation_time' is non-zero
3113 then only the servers that has been created after the `creation_time'
3114 will be announced. */
3116 void silc_server_announce_servers(SilcServer server, bool global,
3117 unsigned long creation_time,
3118 SilcSocketConnection remote)
3120 SilcBuffer servers = NULL;
3122 SILC_LOG_DEBUG(("Announcing servers"));
3124 /* Get servers in local list */
3125 silc_server_announce_get_servers(server, remote->user_data,
3126 server->local_list, &servers,
3130 /* Get servers in global list */
3131 silc_server_announce_get_servers(server, remote->user_data,
3132 server->global_list, &servers,
3136 silc_buffer_push(servers, servers->data - servers->head);
3137 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3139 /* Send the packet */
3140 silc_server_packet_send(server, remote,
3141 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3142 servers->data, servers->len, TRUE);
3144 silc_buffer_free(servers);
3148 /* Returns assembled packet of all clients in the given ID list. The
3149 packet's form is dictated by the New ID Payload. */
3151 static void silc_server_announce_get_clients(SilcServer server,
3153 SilcBuffer *clients,
3154 unsigned long creation_time)
3156 SilcIDCacheList list;
3157 SilcIDCacheEntry id_cache;
3158 SilcClientEntry client;
3161 /* Go through all clients in the list */
3162 if (silc_idcache_get_all(id_list->clients, &list)) {
3163 if (silc_idcache_list_first(list, &id_cache)) {
3165 client = (SilcClientEntry)id_cache->context;
3167 if (creation_time && client->data.created < creation_time) {
3168 if (!silc_idcache_list_next(list, &id_cache))
3173 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3175 *clients = silc_buffer_realloc(*clients,
3177 (*clients)->truelen + idp->len :
3179 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3180 silc_buffer_put(*clients, idp->data, idp->len);
3181 silc_buffer_pull(*clients, idp->len);
3182 silc_buffer_free(idp);
3184 if (!silc_idcache_list_next(list, &id_cache))
3189 silc_idcache_list_free(list);
3193 /* This function is used to announce our existing clients to our router
3194 when we've connected to it. If `creation_time' is non-zero then only
3195 the clients that has been created after the `creation_time' will be
3198 void silc_server_announce_clients(SilcServer server,
3199 unsigned long creation_time,
3200 SilcSocketConnection remote)
3202 SilcBuffer clients = NULL;
3204 SILC_LOG_DEBUG(("Announcing clients"));
3206 /* Get clients in local list */
3207 silc_server_announce_get_clients(server, server->local_list,
3208 &clients, creation_time);
3210 /* As router we announce our global list as well */
3211 if (server->server_type == SILC_ROUTER)
3212 silc_server_announce_get_clients(server, server->global_list,
3213 &clients, creation_time);
3216 silc_buffer_push(clients, clients->data - clients->head);
3217 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3219 /* Send the packet */
3220 silc_server_packet_send(server, remote,
3221 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3222 clients->data, clients->len, TRUE);
3224 silc_buffer_free(clients);
3229 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3235 p = silc_notify_payload_encode(notify, argc, ap);
3241 /* Returns assembled packets for channel users of the `channel'. */
3243 void silc_server_announce_get_channel_users(SilcServer server,
3244 SilcChannelEntry channel,
3245 SilcBuffer *channel_users,
3246 SilcBuffer *channel_users_modes)
3248 SilcChannelClientEntry chl;
3249 SilcHashTableList htl;
3250 SilcBuffer chidp, clidp;
3253 unsigned char mode[4];
3255 SILC_LOG_DEBUG(("Start"));
3257 /* Now find all users on the channel */
3258 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3259 silc_hash_table_list(channel->user_list, &htl);
3260 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3261 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3264 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3265 clidp->data, clidp->len,
3266 chidp->data, chidp->len);
3269 silc_buffer_realloc(*channel_users,
3271 (*channel_users)->truelen + len : len));
3272 silc_buffer_pull_tail(*channel_users,
3273 ((*channel_users)->end -
3274 (*channel_users)->data));
3276 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3277 silc_buffer_pull(*channel_users, len);
3278 silc_buffer_free(tmp);
3280 /* CUMODE notify for mode change on the channel */
3281 SILC_PUT32_MSB(chl->mode, mode);
3282 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3283 3, clidp->data, clidp->len,
3285 clidp->data, clidp->len);
3287 *channel_users_modes =
3288 silc_buffer_realloc(*channel_users_modes,
3289 (*channel_users_modes ?
3290 (*channel_users_modes)->truelen + len : len));
3291 silc_buffer_pull_tail(*channel_users_modes,
3292 ((*channel_users_modes)->end -
3293 (*channel_users_modes)->data));
3295 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3296 silc_buffer_pull(*channel_users_modes, len);
3297 silc_buffer_free(tmp);
3299 silc_buffer_free(clidp);
3301 silc_buffer_free(chidp);
3304 /* Returns assembled packets for all channels and users on those channels
3305 from the given ID List. The packets are in the form dictated by the
3306 New Channel and New Channel User payloads. */
3308 void silc_server_announce_get_channels(SilcServer server,
3310 SilcBuffer *channels,
3311 SilcBuffer *channel_users,
3312 SilcBuffer **channel_users_modes,
3313 uint32 *channel_users_modes_c,
3314 SilcChannelID ***channel_ids,
3315 unsigned long creation_time)
3317 SilcIDCacheList list;
3318 SilcIDCacheEntry id_cache;
3319 SilcChannelEntry channel;
3324 int i = *channel_users_modes_c;
3327 SILC_LOG_DEBUG(("Start"));
3329 /* Go through all channels in the list */
3330 if (silc_idcache_get_all(id_list->channels, &list)) {
3331 if (silc_idcache_list_first(list, &id_cache)) {
3333 channel = (SilcChannelEntry)id_cache->context;
3335 if (creation_time && channel->created < creation_time)
3340 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3341 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3342 name_len = strlen(channel->channel_name);
3345 len = 4 + name_len + id_len + 4;
3347 silc_buffer_realloc(*channels,
3348 (*channels ? (*channels)->truelen +
3350 silc_buffer_pull_tail(*channels,
3351 ((*channels)->end - (*channels)->data));
3352 silc_buffer_format(*channels,
3353 SILC_STR_UI_SHORT(name_len),
3354 SILC_STR_UI_XNSTRING(channel->channel_name,
3356 SILC_STR_UI_SHORT(id_len),
3357 SILC_STR_UI_XNSTRING(cid, id_len),
3358 SILC_STR_UI_INT(channel->mode),
3360 silc_buffer_pull(*channels, len);
3363 *channel_users_modes = silc_realloc(*channel_users_modes,
3364 sizeof(**channel_users_modes) *
3366 (*channel_users_modes)[i] = NULL;
3367 *channel_ids = silc_realloc(*channel_ids,
3368 sizeof(**channel_ids) * (i + 1));
3369 (*channel_ids)[i] = NULL;
3370 silc_server_announce_get_channel_users(server, channel,
3372 channel_users_modes[i]);
3373 (*channel_ids)[i] = channel->id;
3376 if (!silc_idcache_list_next(list, &id_cache))
3380 *channel_users_modes_c += i;
3383 silc_idcache_list_free(list);
3387 /* This function is used to announce our existing channels to our router
3388 when we've connected to it. This also announces the users on the
3389 channels to the router. If the `creation_time' is non-zero only the
3390 channels that was created after the `creation_time' are announced.
3391 Note that the channel users are still announced even if the `creation_time'
3394 void silc_server_announce_channels(SilcServer server,
3395 unsigned long creation_time,
3396 SilcSocketConnection remote)
3398 SilcBuffer channels = NULL, channel_users = NULL;
3399 SilcBuffer *channel_users_modes = NULL;
3400 uint32 channel_users_modes_c = 0;
3401 SilcChannelID **channel_ids = NULL;
3403 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3405 /* Get channels and channel users in local list */
3406 silc_server_announce_get_channels(server, server->local_list,
3407 &channels, &channel_users,
3408 &channel_users_modes,
3409 &channel_users_modes_c,
3410 &channel_ids, creation_time);
3412 /* Get channels and channel users in global list */
3413 silc_server_announce_get_channels(server, server->global_list,
3414 &channels, &channel_users,
3415 &channel_users_modes,
3416 &channel_users_modes_c,
3417 &channel_ids, creation_time);
3420 silc_buffer_push(channels, channels->data - channels->head);
3421 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3423 /* Send the packet */
3424 silc_server_packet_send(server, remote,
3425 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3426 channels->data, channels->len,
3429 silc_buffer_free(channels);
3432 if (channel_users) {
3433 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3434 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3435 channel_users->len);
3437 /* Send the packet */
3438 silc_server_packet_send(server, remote,
3439 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3440 channel_users->data, channel_users->len,
3443 silc_buffer_free(channel_users);
3446 if (channel_users_modes) {
3449 for (i = 0; i < channel_users_modes_c; i++) {
3450 silc_buffer_push(channel_users_modes[i],
3451 channel_users_modes[i]->data -
3452 channel_users_modes[i]->head);
3453 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3454 channel_users_modes[i]->len);
3455 silc_server_packet_send_dest(server, remote,
3456 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3457 channel_ids[i], SILC_ID_CHANNEL,
3458 channel_users_modes[i]->data,
3459 channel_users_modes[i]->len,
3461 silc_buffer_free(channel_users_modes[i]);
3463 silc_free(channel_users_modes);
3464 silc_free(channel_ids);
3468 /* Failure timeout callback. If this is called then we will immediately
3469 process the received failure. We always process the failure with timeout
3470 since we do not want to blindly trust to received failure packets.
3471 This won't be called (the timeout is cancelled) if the failure was
3472 bogus (it is bogus if remote does not close the connection after sending
3475 SILC_TASK_CALLBACK(silc_server_failure_callback)
3477 SilcServerFailureContext f = (SilcServerFailureContext)context;
3479 if (f->sock->protocol) {
3480 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3481 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3487 /* Assembles user list and users mode list from the `channel'. */
3489 void silc_server_get_users_on_channel(SilcServer server,
3490 SilcChannelEntry channel,
3491 SilcBuffer *user_list,
3492 SilcBuffer *mode_list,
3495 SilcChannelClientEntry chl;
3496 SilcHashTableList htl;
3497 SilcBuffer client_id_list;
3498 SilcBuffer client_mode_list;
3500 uint32 list_count = 0, len = 0;
3502 silc_hash_table_list(channel->user_list, &htl);
3503 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3504 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3506 client_id_list = silc_buffer_alloc(len);
3508 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3509 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3510 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3512 silc_hash_table_list(channel->user_list, &htl);
3513 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3515 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3516 silc_buffer_put(client_id_list, idp->data, idp->len);
3517 silc_buffer_pull(client_id_list, idp->len);
3518 silc_buffer_free(idp);
3520 /* Client's mode on channel */
3521 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3522 silc_buffer_pull(client_mode_list, 4);
3526 silc_buffer_push(client_id_list,
3527 client_id_list->data - client_id_list->head);
3528 silc_buffer_push(client_mode_list,
3529 client_mode_list->data - client_mode_list->head);
3531 *user_list = client_id_list;
3532 *mode_list = client_mode_list;
3533 *user_count = list_count;
3536 /* Saves users and their modes to the `channel'. */
3538 void silc_server_save_users_on_channel(SilcServer server,
3539 SilcSocketConnection sock,
3540 SilcChannelEntry channel,
3541 SilcClientID *noadd,
3542 SilcBuffer user_list,
3543 SilcBuffer mode_list,
3548 for (i = 0; i < user_count; i++) {
3551 SilcClientID *client_id;
3552 SilcClientEntry client;
3555 SILC_GET16_MSB(idp_len, user_list->data + 2);
3557 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3558 silc_buffer_pull(user_list, idp_len);
3563 SILC_GET32_MSB(mode, mode_list->data);
3564 silc_buffer_pull(mode_list, 4);
3566 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3567 silc_free(client_id);
3571 /* Check if we have this client cached already. */
3572 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3573 server->server_type, NULL);
3575 client = silc_idlist_find_client_by_id(server->global_list,
3576 client_id, server->server_type,
3579 /* If router did not find such Client ID in its lists then this must
3580 be bogus client or some router in the net is buggy. */
3581 if (server->server_type == SILC_ROUTER) {
3582 silc_free(client_id);
3586 /* We don't have that client anywhere, add it. The client is added
3587 to global list since server didn't have it in the lists so it must be
3589 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3590 silc_id_dup(client_id, SILC_ID_CLIENT),
3591 sock->user_data, NULL);
3593 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3594 silc_free(client_id);
3598 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3601 silc_free(client_id);
3603 if (!silc_server_client_on_channel(client, channel)) {
3604 /* Client was not on the channel, add it. */
3605 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3606 chl->client = client;
3608 chl->channel = channel;
3609 silc_hash_table_add(channel->user_list, chl->client, chl);
3610 silc_hash_table_add(client->channels, chl->channel, chl);
3615 /* Lookups route to the client indicated by the `id_data'. The connection
3616 object and internal data object is returned. Returns NULL if route
3617 could not be found to the client. If the `client_id' is specified then
3618 it is used and the `id_data' is ignored. */
3620 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3621 unsigned char *id_data,
3623 SilcClientID *client_id,
3624 SilcIDListData *idata)
3627 SilcClientEntry client;
3629 SILC_LOG_DEBUG(("Start"));
3631 /* Decode destination Client ID */
3633 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3635 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3639 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3642 /* If the destination belongs to our server we don't have to route
3643 the packet anywhere but to send it to the local destination. */
3644 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3648 /* If we are router and the client has router then the client is in
3649 our cell but not directly connected to us. */
3650 if (server->server_type == SILC_ROUTER && client->router) {
3651 /* We are of course in this case the client's router thus the route
3652 to the client is the server who owns the client. So, we will send
3653 the packet to that server. */
3655 *idata = (SilcIDListData)client->router;
3656 return client->router->connection;
3659 /* Seems that client really is directly connected to us */
3661 *idata = (SilcIDListData)client;
3662 return client->connection;
3665 /* Destination belongs to someone not in this server. If we are normal
3666 server our action is to send the packet to our router. */
3667 if (server->server_type != SILC_ROUTER && !server->standalone) {
3670 *idata = (SilcIDListData)server->router;
3671 return server->router->connection;
3674 /* We are router and we will perform route lookup for the destination
3675 and send the packet to fastest route. */
3676 if (server->server_type == SILC_ROUTER && !server->standalone) {
3677 /* Check first that the ID is valid */
3678 client = silc_idlist_find_client_by_id(server->global_list, id,
3681 SilcSocketConnection dst_sock;
3683 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3687 *idata = (SilcIDListData)dst_sock->user_data;
3696 /* Encodes and returns channel list of channels the `client' has joined.
3697 Secret channels are not put to the list. */
3699 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3700 SilcClientEntry client)
3702 SilcBuffer buffer = NULL;
3703 SilcChannelEntry channel;
3704 SilcChannelClientEntry chl;
3705 SilcHashTableList htl;
3711 silc_hash_table_list(client->channels, &htl);
3712 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3713 channel = chl->channel;
3715 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3716 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3719 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3720 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3721 name_len = strlen(channel->channel_name);
3723 len = 4 + name_len + id_len + 4;
3724 buffer = silc_buffer_realloc(buffer,
3725 (buffer ? (buffer)->truelen + len : len));
3726 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3727 silc_buffer_format(buffer,
3728 SILC_STR_UI_SHORT(name_len),
3729 SILC_STR_UI_XNSTRING(channel->channel_name,
3731 SILC_STR_UI_SHORT(id_len),
3732 SILC_STR_UI_XNSTRING(cid, id_len),
3733 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3735 silc_buffer_pull(buffer, len);
3740 silc_buffer_push(buffer, buffer->data - buffer->head);
3745 /* Finds client entry by Client ID and if it is not found then resolves
3746 it using WHOIS command. */
3748 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3749 SilcClientID *client_id)
3751 SilcClientEntry client;
3753 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3756 client = silc_idlist_find_client_by_id(server->global_list,
3757 client_id, TRUE, NULL);
3758 if (!client && server->server_type == SILC_ROUTER)
3762 if (!client && server->standalone)
3765 if (!client || !client->nickname || !client->username) {
3766 SilcBuffer buffer, idp;
3768 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3769 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3770 client->resolve_cmd_ident = ++server->cmd_ident;
3772 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3773 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3774 server->cmd_ident, 1,
3775 3, idp->data, idp->len);
3776 silc_server_packet_send(server, client ? client->router->connection :
3777 server->router->connection,
3778 SILC_PACKET_COMMAND, 0,
3779 buffer->data, buffer->len, FALSE);
3780 silc_buffer_free(idp);
3781 silc_buffer_free(buffer);
3788 /* A timeout callback for the re-key. We will be the initiator of the
3791 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3793 SilcSocketConnection sock = (SilcSocketConnection)context;
3794 SilcIDListData idata = (SilcIDListData)sock->user_data;
3795 SilcServer server = (SilcServer)idata->rekey->context;
3796 SilcProtocol protocol;
3797 SilcServerRekeyInternalContext *proto_ctx;
3799 SILC_LOG_DEBUG(("Start"));
3801 /* Allocate internal protocol context. This is sent as context
3803 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3804 proto_ctx->server = (void *)server;
3805 proto_ctx->sock = sock;
3806 proto_ctx->responder = FALSE;
3807 proto_ctx->pfs = idata->rekey->pfs;
3809 /* Perform rekey protocol. Will call the final callback after the
3810 protocol is over. */
3811 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3812 &protocol, proto_ctx, silc_server_rekey_final);
3813 sock->protocol = protocol;
3815 /* Run the protocol */
3816 silc_protocol_execute(protocol, server->schedule, 0, 0);
3818 /* Re-register re-key timeout */
3819 silc_schedule_task_add(server->schedule, sock->sock,
3820 silc_server_rekey_callback,
3821 context, idata->rekey->timeout, 0,
3822 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3825 /* The final callback for the REKEY protocol. This will actually take the
3826 new key material into use. */
3828 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3830 SilcProtocol protocol = (SilcProtocol)context;
3831 SilcServerRekeyInternalContext *ctx =
3832 (SilcServerRekeyInternalContext *)protocol->context;
3833 SilcServer server = (SilcServer)ctx->server;
3834 SilcSocketConnection sock = ctx->sock;
3836 SILC_LOG_DEBUG(("Start"));
3838 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3839 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3840 /* Error occured during protocol */
3841 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3842 silc_protocol_cancel(protocol, server->schedule);
3843 silc_protocol_free(protocol);
3844 sock->protocol = NULL;
3846 silc_packet_context_free(ctx->packet);
3848 silc_ske_free(ctx->ske);
3853 /* Purge the outgoing data queue to assure that all rekey packets really
3854 go to the network before we quit the protocol. */
3855 silc_server_packet_queue_purge(server, sock);
3858 silc_protocol_free(protocol);
3859 sock->protocol = NULL;
3861 silc_packet_context_free(ctx->packet);
3863 silc_ske_free(ctx->ske);