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 as soon as possible */
1701 silc_schedule_task_add(server->schedule, sock->sock,
1702 silc_server_packet_parse_real,
1703 (void *)parser_context, 0, 1,
1705 SILC_TASK_PRI_NORMAL);
1714 /* Parses the packet type and calls what ever routines the packet type
1715 requires. This is done for all incoming packets. */
1717 void silc_server_packet_parse_type(SilcServer server,
1718 SilcSocketConnection sock,
1719 SilcPacketContext *packet)
1721 SilcPacketType type = packet->type;
1722 SilcIDListData idata = (SilcIDListData)sock->user_data;
1724 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1726 /* Parse the packet type */
1728 case SILC_PACKET_DISCONNECT:
1729 SILC_LOG_DEBUG(("Disconnect packet"));
1730 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 case SILC_PACKET_SUCCESS:
1736 * Success received for something. For now we can have only
1737 * one protocol for connection executing at once hence this
1738 * success message is for whatever protocol is executing currently.
1740 SILC_LOG_DEBUG(("Success packet"));
1741 if (packet->flags & SILC_PACKET_FLAG_LIST)
1744 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1747 case SILC_PACKET_FAILURE:
1749 * Failure received for something. For now we can have only
1750 * one protocol for connection executing at once hence this
1751 * failure message is for whatever protocol is executing currently.
1753 SILC_LOG_DEBUG(("Failure packet"));
1754 if (packet->flags & SILC_PACKET_FLAG_LIST)
1756 if (sock->protocol) {
1757 SilcServerFailureContext f;
1758 f = silc_calloc(1, sizeof(*f));
1762 /* We will wait 5 seconds to process this failure packet */
1763 silc_schedule_task_add(server->schedule, sock->sock,
1764 silc_server_failure_callback, (void *)f, 5, 0,
1765 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1769 case SILC_PACKET_REJECT:
1770 SILC_LOG_DEBUG(("Reject packet"));
1771 if (packet->flags & SILC_PACKET_FLAG_LIST)
1776 case SILC_PACKET_NOTIFY:
1778 * Received notify packet. Server can receive notify packets from
1779 * router. Server then relays the notify messages to clients if needed.
1781 SILC_LOG_DEBUG(("Notify packet"));
1782 if (packet->flags & SILC_PACKET_FLAG_LIST)
1783 silc_server_notify_list(server, sock, packet);
1785 silc_server_notify(server, sock, packet);
1791 case SILC_PACKET_CHANNEL_MESSAGE:
1793 * Received channel message. Channel messages are special packets
1794 * (although probably most common ones) thus they are handled
1797 SILC_LOG_DEBUG(("Channel Message packet"));
1798 if (packet->flags & SILC_PACKET_FLAG_LIST)
1800 idata->last_receive = time(NULL);
1801 silc_server_channel_message(server, sock, packet);
1804 case SILC_PACKET_CHANNEL_KEY:
1806 * Received key for channel. As channels are created by the router
1807 * the keys are as well. We will distribute the key to all of our
1808 * locally connected clients on the particular channel. Router
1809 * never receives this channel and thus is ignored.
1811 SILC_LOG_DEBUG(("Channel Key packet"));
1812 if (packet->flags & SILC_PACKET_FLAG_LIST)
1814 silc_server_channel_key(server, sock, packet);
1820 case SILC_PACKET_COMMAND:
1822 * Recived command. Processes the command request and allocates the
1823 * command context and calls the command.
1825 SILC_LOG_DEBUG(("Command packet"));
1826 if (packet->flags & SILC_PACKET_FLAG_LIST)
1828 silc_server_command_process(server, sock, packet);
1831 case SILC_PACKET_COMMAND_REPLY:
1833 * Received command reply packet. Received command reply to command. It
1834 * may be reply to command sent by us or reply to command sent by client
1835 * that we've routed further.
1837 SILC_LOG_DEBUG(("Command Reply packet"));
1838 if (packet->flags & SILC_PACKET_FLAG_LIST)
1840 silc_server_command_reply(server, sock, packet);
1844 * Private Message packets
1846 case SILC_PACKET_PRIVATE_MESSAGE:
1848 * Received private message packet. The packet is coming from either
1851 SILC_LOG_DEBUG(("Private Message packet"));
1852 if (packet->flags & SILC_PACKET_FLAG_LIST)
1854 idata->last_receive = time(NULL);
1855 silc_server_private_message(server, sock, packet);
1858 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1860 * Private message key packet.
1862 if (packet->flags & SILC_PACKET_FLAG_LIST)
1864 silc_server_private_message_key(server, sock, packet);
1868 * Key Exchange protocol packets
1870 case SILC_PACKET_KEY_EXCHANGE:
1871 SILC_LOG_DEBUG(("KE packet"));
1872 if (packet->flags & SILC_PACKET_FLAG_LIST)
1875 if (sock->protocol && sock->protocol->protocol &&
1876 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1878 SilcServerKEInternalContext *proto_ctx =
1879 (SilcServerKEInternalContext *)sock->protocol->context;
1881 proto_ctx->packet = silc_packet_context_dup(packet);
1883 /* Let the protocol handle the packet */
1884 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1886 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1887 "protocol active, packet dropped."));
1891 case SILC_PACKET_KEY_EXCHANGE_1:
1892 SILC_LOG_DEBUG(("KE 1 packet"));
1893 if (packet->flags & SILC_PACKET_FLAG_LIST)
1896 if (sock->protocol && sock->protocol->protocol &&
1897 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1898 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1900 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1901 SilcServerRekeyInternalContext *proto_ctx =
1902 (SilcServerRekeyInternalContext *)sock->protocol->context;
1904 if (proto_ctx->packet)
1905 silc_packet_context_free(proto_ctx->packet);
1907 proto_ctx->packet = silc_packet_context_dup(packet);
1909 /* Let the protocol handle the packet */
1910 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1912 SilcServerKEInternalContext *proto_ctx =
1913 (SilcServerKEInternalContext *)sock->protocol->context;
1915 if (proto_ctx->packet)
1916 silc_packet_context_free(proto_ctx->packet);
1918 proto_ctx->packet = silc_packet_context_dup(packet);
1919 proto_ctx->dest_id_type = packet->src_id_type;
1920 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1921 packet->src_id_type);
1922 if (!proto_ctx->dest_id)
1925 /* Let the protocol handle the packet */
1926 silc_protocol_execute(sock->protocol, server->schedule,
1930 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1931 "protocol active, packet dropped."));
1935 case SILC_PACKET_KEY_EXCHANGE_2:
1936 SILC_LOG_DEBUG(("KE 2 packet"));
1937 if (packet->flags & SILC_PACKET_FLAG_LIST)
1940 if (sock->protocol && sock->protocol->protocol &&
1941 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1942 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1944 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1945 SilcServerRekeyInternalContext *proto_ctx =
1946 (SilcServerRekeyInternalContext *)sock->protocol->context;
1948 if (proto_ctx->packet)
1949 silc_packet_context_free(proto_ctx->packet);
1951 proto_ctx->packet = silc_packet_context_dup(packet);
1953 /* Let the protocol handle the packet */
1954 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1956 SilcServerKEInternalContext *proto_ctx =
1957 (SilcServerKEInternalContext *)sock->protocol->context;
1959 if (proto_ctx->packet)
1960 silc_packet_context_free(proto_ctx->packet);
1962 proto_ctx->packet = silc_packet_context_dup(packet);
1963 proto_ctx->dest_id_type = packet->src_id_type;
1964 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1965 packet->src_id_type);
1966 if (!proto_ctx->dest_id)
1969 /* Let the protocol handle the packet */
1970 silc_protocol_execute(sock->protocol, server->schedule,
1974 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1975 "protocol active, packet dropped."));
1979 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1981 * Connection authentication request packet. When we receive this packet
1982 * we will send to the other end information about our mandatory
1983 * authentication method for the connection. This packet maybe received
1986 SILC_LOG_DEBUG(("Connection authentication request packet"));
1987 if (packet->flags & SILC_PACKET_FLAG_LIST)
1989 silc_server_connection_auth_request(server, sock, packet);
1993 * Connection Authentication protocol packets
1995 case SILC_PACKET_CONNECTION_AUTH:
1996 /* Start of the authentication protocol. We receive here the
1997 authentication data and will verify it. */
1998 SILC_LOG_DEBUG(("Connection auth packet"));
1999 if (packet->flags & SILC_PACKET_FLAG_LIST)
2002 if (sock->protocol && sock->protocol->protocol->type
2003 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2005 SilcServerConnAuthInternalContext *proto_ctx =
2006 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2008 proto_ctx->packet = silc_packet_context_dup(packet);
2010 /* Let the protocol handle the packet */
2011 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2013 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2014 "protocol active, packet dropped."));
2018 case SILC_PACKET_NEW_ID:
2020 * Received New ID packet. This includes some new ID that has been
2021 * created. It may be for client, server or channel. This is the way
2022 * to distribute information about new registered entities in the
2025 SILC_LOG_DEBUG(("New ID packet"));
2026 if (packet->flags & SILC_PACKET_FLAG_LIST)
2027 silc_server_new_id_list(server, sock, packet);
2029 silc_server_new_id(server, sock, packet);
2032 case SILC_PACKET_NEW_CLIENT:
2034 * Received new client packet. This includes client information that
2035 * we will use to create initial client ID. After creating new
2036 * ID we will send it to the client.
2038 SILC_LOG_DEBUG(("New Client packet"));
2039 if (packet->flags & SILC_PACKET_FLAG_LIST)
2041 silc_server_new_client(server, sock, packet);
2044 case SILC_PACKET_NEW_SERVER:
2046 * Received new server packet. This includes Server ID and some other
2047 * information that we may save. This is received after server has
2050 SILC_LOG_DEBUG(("New Server packet"));
2051 if (packet->flags & SILC_PACKET_FLAG_LIST)
2053 silc_server_new_server(server, sock, packet);
2056 case SILC_PACKET_NEW_CHANNEL:
2058 * Received new channel packet. Information about new channel in the
2059 * network are distributed using this packet.
2061 SILC_LOG_DEBUG(("New Channel packet"));
2062 if (packet->flags & SILC_PACKET_FLAG_LIST)
2063 silc_server_new_channel_list(server, sock, packet);
2065 silc_server_new_channel(server, sock, packet);
2068 case SILC_PACKET_HEARTBEAT:
2070 * Received heartbeat.
2072 SILC_LOG_DEBUG(("Heartbeat packet"));
2073 if (packet->flags & SILC_PACKET_FLAG_LIST)
2077 case SILC_PACKET_KEY_AGREEMENT:
2079 * Received heartbeat.
2081 SILC_LOG_DEBUG(("Key agreement packet"));
2082 if (packet->flags & SILC_PACKET_FLAG_LIST)
2084 silc_server_key_agreement(server, sock, packet);
2087 case SILC_PACKET_REKEY:
2089 * Received re-key packet. The sender wants to regenerate the session
2092 SILC_LOG_DEBUG(("Re-key packet"));
2093 if (packet->flags & SILC_PACKET_FLAG_LIST)
2095 silc_server_rekey(server, sock, packet);
2098 case SILC_PACKET_REKEY_DONE:
2100 * The re-key is done.
2102 SILC_LOG_DEBUG(("Re-key done packet"));
2103 if (packet->flags & SILC_PACKET_FLAG_LIST)
2106 if (sock->protocol && sock->protocol->protocol &&
2107 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2109 SilcServerRekeyInternalContext *proto_ctx =
2110 (SilcServerRekeyInternalContext *)sock->protocol->context;
2112 if (proto_ctx->packet)
2113 silc_packet_context_free(proto_ctx->packet);
2115 proto_ctx->packet = silc_packet_context_dup(packet);
2117 /* Let the protocol handle the packet */
2118 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2120 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2121 "protocol active, packet dropped."));
2125 case SILC_PACKET_FTP:
2127 SILC_LOG_DEBUG(("FTP packet"));
2128 if (packet->flags & SILC_PACKET_FLAG_LIST)
2130 silc_server_ftp(server, sock, packet);
2133 case SILC_PACKET_RESUME_ROUTER:
2134 /* Resume router packet received. This packet is received for backup
2135 router resuming protocol. */
2136 SILC_LOG_DEBUG(("Resume router packet"));
2137 if (packet->flags & SILC_PACKET_FLAG_LIST)
2139 silc_server_backup_resume_router(server, sock, packet);
2143 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2149 /* Creates connection to a remote router. */
2151 void silc_server_create_connection(SilcServer server,
2152 char *remote_host, uint32 port)
2154 SilcServerConnection sconn;
2156 /* Allocate connection object for hold connection specific stuff. */
2157 sconn = silc_calloc(1, sizeof(*sconn));
2158 sconn->server = server;
2159 sconn->remote_host = strdup(remote_host);
2160 sconn->remote_port = port;
2162 silc_schedule_task_add(server->schedule, 0,
2163 silc_server_connect_router,
2164 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2165 SILC_TASK_PRI_NORMAL);
2168 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2170 silc_socket_free((SilcSocketConnection)context);
2173 /* Closes connection to socket connection */
2175 void silc_server_close_connection(SilcServer server,
2176 SilcSocketConnection sock)
2178 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2180 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2181 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2182 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2185 /* We won't listen for this connection anymore */
2186 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2188 /* Unregister all tasks */
2189 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2191 /* Close the actual connection */
2192 silc_net_close_connection(sock->sock);
2193 server->sockets[sock->sock] = NULL;
2195 /* If sock->user_data is NULL then we'll check for active protocols
2196 here since the silc_server_free_sock_user_data has not been called
2197 for this connection. */
2198 if (!sock->user_data) {
2199 /* If any protocol is active cancel its execution. It will call
2200 the final callback which will finalize the disconnection. */
2201 if (sock->protocol) {
2202 silc_protocol_cancel(sock->protocol, server->schedule);
2203 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2204 silc_protocol_execute_final(sock->protocol, server->schedule);
2205 sock->protocol = NULL;
2210 silc_schedule_task_add(server->schedule, 0,
2211 silc_server_close_connection_final,
2212 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2213 SILC_TASK_PRI_NORMAL);
2216 /* Sends disconnect message to remote connection and disconnects the
2219 void silc_server_disconnect_remote(SilcServer server,
2220 SilcSocketConnection sock,
2221 const char *fmt, ...)
2224 unsigned char buf[4096];
2229 memset(buf, 0, sizeof(buf));
2231 vsprintf(buf, fmt, ap);
2234 SILC_LOG_DEBUG(("Disconnecting remote host"));
2236 /* Notify remote end that the conversation is over. The notify message
2237 is tried to be sent immediately. */
2238 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2239 buf, strlen(buf), TRUE);
2241 /* Mark the connection to be disconnected */
2242 SILC_SET_DISCONNECTED(sock);
2243 silc_server_close_connection(server, sock);
2248 SilcClientEntry client;
2249 } *FreeClientInternal;
2251 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2253 FreeClientInternal i = (FreeClientInternal)context;
2255 silc_idlist_del_data(i->client);
2256 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2260 /* Frees client data and notifies about client's signoff. */
2262 void silc_server_free_client_data(SilcServer server,
2263 SilcSocketConnection sock,
2264 SilcClientEntry client,
2268 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2270 /* If there is pending outgoing data for the client then purge it
2271 to the network before removing the client entry. */
2272 silc_server_packet_queue_purge(server, sock);
2277 /* Send SIGNOFF notify to routers. */
2278 if (notify && !server->standalone && server->router)
2279 silc_server_send_notify_signoff(server, server->router->connection,
2280 server->server_type == SILC_SERVER ?
2281 FALSE : TRUE, client->id, signoff);
2283 /* Remove client from all channels */
2285 silc_server_remove_from_channels(server, NULL, client,
2286 TRUE, signoff, TRUE);
2288 silc_server_remove_from_channels(server, NULL, client,
2289 FALSE, NULL, FALSE);
2291 /* We will not delete the client entry right away. We will take it
2292 into history (for WHOWAS command) for 5 minutes */
2295 silc_schedule_task_add(server->schedule, 0,
2296 silc_server_free_client_data_timeout,
2298 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2299 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2300 client->router = NULL;
2301 client->connection = NULL;
2303 /* Free the client entry and everything in it */
2304 server->stat.my_clients--;
2305 server->stat.clients--;
2306 if (server->server_type == SILC_ROUTER)
2307 server->stat.cell_clients--;
2310 /* Frees user_data pointer from socket connection object. This also sends
2311 appropriate notify packets to the network to inform about leaving
2314 void silc_server_free_sock_user_data(SilcServer server,
2315 SilcSocketConnection sock)
2317 SILC_LOG_DEBUG(("Start"));
2319 switch (sock->type) {
2320 case SILC_SOCKET_TYPE_CLIENT:
2322 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2323 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2326 case SILC_SOCKET_TYPE_SERVER:
2327 case SILC_SOCKET_TYPE_ROUTER:
2329 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2330 SilcServerEntry backup_router = NULL;
2333 backup_router = silc_server_backup_get(server, user_data->id);
2335 /* If this was our primary router connection then we're lost to
2336 the outside world. */
2337 if (server->router == user_data) {
2338 /* Check whether we have a backup router connection */
2339 if (!backup_router || backup_router == user_data) {
2340 silc_schedule_task_add(server->schedule, 0,
2341 silc_server_connect_to_router,
2344 SILC_TASK_PRI_NORMAL);
2346 server->id_entry->router = NULL;
2347 server->router = NULL;
2348 server->standalone = TRUE;
2349 backup_router = NULL;
2351 SILC_LOG_INFO(("New primary router is backup router %s",
2352 backup_router->server_name));
2353 SILC_LOG_DEBUG(("New primary router is backup router %s",
2354 backup_router->server_name));
2355 server->id_entry->router = backup_router;
2356 server->router = backup_router;
2357 server->router_connect = time(0);
2358 server->backup_primary = TRUE;
2359 if (server->server_type == SILC_BACKUP_ROUTER) {
2360 server->server_type = SILC_ROUTER;
2362 /* We'll need to constantly try to reconnect to the primary
2363 router so that we'll see when it comes back online. */
2364 silc_server_backup_reconnect(server, sock->ip, sock->port,
2365 silc_server_backup_connected,
2369 /* Mark this connection as replaced */
2370 silc_server_backup_replaced_add(server, user_data->id,
2373 } else if (backup_router) {
2374 SILC_LOG_INFO(("Enabling the use of backup router %s",
2375 backup_router->server_name));
2376 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2377 backup_router->server_name));
2379 /* Mark this connection as replaced */
2380 silc_server_backup_replaced_add(server, user_data->id,
2384 if (!backup_router) {
2385 /* Free all client entries that this server owns as they will
2386 become invalid now as well. */
2388 silc_server_remove_clients_by_server(server, user_data, TRUE);
2390 /* Update the client entries of this server to the new backup
2391 router. This also removes the clients that *really* was owned
2392 by the primary router and went down with the router. */
2393 silc_server_update_clients_by_server(server, user_data, backup_router,
2395 silc_server_update_servers_by_server(server, user_data, backup_router);
2398 /* Free the server entry */
2399 silc_server_backup_del(server, user_data);
2400 silc_server_backup_replaced_del(server, user_data);
2401 silc_idlist_del_data(user_data);
2402 if (!silc_idlist_del_server(server->local_list, user_data))
2403 silc_idlist_del_server(server->global_list, user_data);
2404 server->stat.my_servers--;
2405 server->stat.servers--;
2406 if (server->server_type == SILC_ROUTER)
2407 server->stat.cell_servers--;
2409 if (backup_router) {
2410 /* Announce all of our stuff that was created about 5 minutes ago.
2411 The backup router knows all the other stuff already. */
2412 if (server->server_type == SILC_ROUTER)
2413 silc_server_announce_servers(server, FALSE, time(0) - 300,
2414 backup_router->connection);
2416 /* Announce our clients and channels to the router */
2417 silc_server_announce_clients(server, time(0) - 300,
2418 backup_router->connection);
2419 silc_server_announce_channels(server, time(0) - 300,
2420 backup_router->connection);
2426 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2428 silc_idlist_del_data(user_data);
2429 silc_free(user_data);
2434 /* If any protocol is active cancel its execution */
2435 if (sock->protocol) {
2436 silc_protocol_cancel(sock->protocol, server->schedule);
2437 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2438 silc_protocol_execute_final(sock->protocol, server->schedule);
2439 sock->protocol = NULL;
2442 sock->user_data = NULL;
2445 /* Removes client from all channels it has joined. This is used when client
2446 connection is disconnected. If the client on a channel is last, the
2447 channel is removed as well. This sends the SIGNOFF notify types. */
2449 void silc_server_remove_from_channels(SilcServer server,
2450 SilcSocketConnection sock,
2451 SilcClientEntry client,
2453 char *signoff_message,
2456 SilcChannelEntry channel;
2457 SilcChannelClientEntry chl;
2458 SilcHashTableList htl;
2461 SILC_LOG_DEBUG(("Start"));
2463 if (!client || !client->id)
2466 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2468 /* Remove the client from all channels. The client is removed from
2469 the channels' user list. */
2470 silc_hash_table_list(client->channels, &htl);
2471 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2472 channel = chl->channel;
2474 /* Remove channel from client's channel list */
2475 silc_hash_table_del(client->channels, channel);
2477 /* Remove channel if there is no users anymore */
2478 if (server->server_type == SILC_ROUTER &&
2479 silc_hash_table_count(channel->user_list) < 2) {
2481 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2482 if (silc_idlist_del_channel(server->local_list, channel))
2483 server->stat.my_channels--;
2484 else if (silc_idlist_del_channel(server->global_list, channel))
2485 server->stat.my_channels--;
2489 /* Remove client from channel's client list */
2490 silc_hash_table_del(channel->user_list, chl->client);
2492 /* If there is no global users on the channel anymore mark the channel
2493 as local channel. Do not check if the removed client is local client. */
2494 if (server->server_type != SILC_ROUTER && channel->global_users &&
2495 chl->client->router && !silc_server_channel_has_global(channel))
2496 channel->global_users = FALSE;
2499 server->stat.my_chanclients--;
2501 /* If there is not at least one local user on the channel then we don't
2502 need the channel entry anymore, we can remove it safely. */
2503 if (server->server_type != SILC_ROUTER &&
2504 !silc_server_channel_has_local(channel)) {
2505 /* Notify about leaving client if this channel has global users. */
2506 if (notify && channel->global_users)
2507 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2508 SILC_NOTIFY_TYPE_SIGNOFF,
2509 signoff_message ? 2 : 1,
2510 clidp->data, clidp->len,
2511 signoff_message, signoff_message ?
2512 strlen(signoff_message) : 0);
2515 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2517 if (channel->founder_key) {
2518 /* The founder auth data exists, do not remove the channel entry */
2519 SilcChannelClientEntry chl2;
2520 SilcHashTableList htl2;
2524 silc_hash_table_list(channel->user_list, &htl2);
2525 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2526 silc_hash_table_del(chl2->client->channels, channel);
2527 silc_hash_table_del(channel->user_list, chl2->client);
2533 /* Remove the channel entry */
2534 if (silc_idlist_del_channel(server->local_list, channel))
2535 server->stat.my_channels--;
2536 else if (silc_idlist_del_channel(server->global_list, channel))
2537 server->stat.my_channels--;
2541 /* Send notify to channel about client leaving SILC and thus
2542 the entire channel. */
2544 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2545 SILC_NOTIFY_TYPE_SIGNOFF,
2546 signoff_message ? 2 : 1,
2547 clidp->data, clidp->len,
2548 signoff_message, signoff_message ?
2549 strlen(signoff_message) : 0);
2551 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2552 /* Re-generate channel key */
2553 if (!silc_server_create_channel_key(server, channel, 0))
2556 /* Send the channel key to the channel. The key of course is not sent
2557 to the client who was removed from the channel. */
2558 silc_server_send_channel_key(server, client->connection, channel,
2559 server->server_type == SILC_ROUTER ?
2560 FALSE : !server->standalone);
2564 silc_buffer_free(clidp);
2567 /* Removes client from one channel. This is used for example when client
2568 calls LEAVE command to remove itself from the channel. Returns TRUE
2569 if channel still exists and FALSE if the channel is removed when
2570 last client leaves the channel. If `notify' is FALSE notify messages
2573 int silc_server_remove_from_one_channel(SilcServer server,
2574 SilcSocketConnection sock,
2575 SilcChannelEntry channel,
2576 SilcClientEntry client,
2579 SilcChannelClientEntry chl;
2582 SILC_LOG_DEBUG(("Start"));
2584 /* Get the entry to the channel, if this client is not on the channel
2586 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2589 /* Remove the client from the channel. The client is removed from
2590 the channel's user list. */
2592 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2594 /* Remove channel from client's channel list */
2595 silc_hash_table_del(client->channels, chl->channel);
2597 /* Remove channel if there is no users anymore */
2598 if (server->server_type == SILC_ROUTER &&
2599 silc_hash_table_count(channel->user_list) < 2) {
2601 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2602 if (silc_idlist_del_channel(server->local_list, channel))
2603 server->stat.my_channels--;
2604 else if (silc_idlist_del_channel(server->global_list, channel))
2605 server->stat.my_channels--;
2606 silc_buffer_free(clidp);
2610 /* Remove client from channel's client list */
2611 silc_hash_table_del(channel->user_list, chl->client);
2613 /* If there is no global users on the channel anymore mark the channel
2614 as local channel. Do not check if the client is local client. */
2615 if (server->server_type != SILC_ROUTER && channel->global_users &&
2616 chl->client->router && !silc_server_channel_has_global(channel))
2617 channel->global_users = FALSE;
2620 server->stat.my_chanclients--;
2622 /* If there is not at least one local user on the channel then we don't
2623 need the channel entry anymore, we can remove it safely. */
2624 if (server->server_type != SILC_ROUTER &&
2625 !silc_server_channel_has_local(channel)) {
2626 /* Notify about leaving client if this channel has global users. */
2627 if (notify && channel->global_users)
2628 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2629 SILC_NOTIFY_TYPE_LEAVE, 1,
2630 clidp->data, clidp->len);
2632 silc_buffer_free(clidp);
2635 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2637 if (channel->founder_key) {
2638 /* The founder auth data exists, do not remove the channel entry */
2639 SilcChannelClientEntry chl2;
2640 SilcHashTableList htl2;
2644 silc_hash_table_list(channel->user_list, &htl2);
2645 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2646 silc_hash_table_del(chl2->client->channels, channel);
2647 silc_hash_table_del(channel->user_list, chl2->client);
2653 /* Remove the channel entry */
2654 if (silc_idlist_del_channel(server->local_list, channel))
2655 server->stat.my_channels--;
2656 else if (silc_idlist_del_channel(server->global_list, channel))
2657 server->stat.my_channels--;
2661 /* Send notify to channel about client leaving the channel */
2663 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2664 SILC_NOTIFY_TYPE_LEAVE, 1,
2665 clidp->data, clidp->len);
2667 silc_buffer_free(clidp);
2671 /* Timeout callback. This is called if connection is idle or for some
2672 other reason is not responding within some period of time. This
2673 disconnects the remote end. */
2675 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2677 SilcServer server = (SilcServer)context;
2678 SilcSocketConnection sock = server->sockets[fd];
2680 SILC_LOG_DEBUG(("Start"));
2685 /* If we have protocol active we must assure that we call the protocol's
2686 final callback so that all the memory is freed. */
2687 if (sock->protocol) {
2688 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2689 silc_protocol_execute_final(sock->protocol, server->schedule);
2693 if (sock->user_data)
2694 silc_server_free_sock_user_data(server, sock);
2696 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2697 "Connection timeout");
2700 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2701 function may be used only by router. In real SILC network all channels
2702 are created by routers thus this function is never used by normal
2705 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2706 SilcServerID *router_id,
2712 SilcChannelID *channel_id;
2713 SilcChannelEntry entry;
2717 SILC_LOG_DEBUG(("Creating new channel"));
2720 cipher = SILC_DEFAULT_CIPHER;
2722 hmac = SILC_DEFAULT_HMAC;
2724 /* Allocate cipher */
2725 if (!silc_cipher_alloc(cipher, &key))
2729 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2730 silc_cipher_free(key);
2734 channel_name = strdup(channel_name);
2736 /* Create the channel */
2737 if (!silc_id_create_channel_id(server, router_id, server->rng,
2739 silc_free(channel_name);
2740 silc_cipher_free(key);
2741 silc_hmac_free(newhmac);
2744 entry = silc_idlist_add_channel(server->local_list, channel_name,
2745 SILC_CHANNEL_MODE_NONE, channel_id,
2746 NULL, key, newhmac);
2748 silc_free(channel_name);
2749 silc_cipher_free(key);
2750 silc_hmac_free(newhmac);
2754 entry->cipher = strdup(cipher);
2755 entry->hmac_name = strdup(hmac);
2757 /* Now create the actual key material */
2758 if (!silc_server_create_channel_key(server, entry,
2759 silc_cipher_get_key_len(key) / 8)) {
2760 silc_free(channel_name);
2761 silc_cipher_free(key);
2762 silc_hmac_free(newhmac);
2763 silc_free(entry->cipher);
2764 silc_free(entry->hmac_name);
2768 /* Notify other routers about the new channel. We send the packet
2769 to our primary route. */
2770 if (broadcast && server->standalone == FALSE)
2771 silc_server_send_new_channel(server, server->router->connection, TRUE,
2772 channel_name, entry->id,
2773 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2776 server->stat.my_channels++;
2781 /* Same as above but creates the channel with Channel ID `channel_id. */
2784 silc_server_create_new_channel_with_id(SilcServer server,
2788 SilcChannelID *channel_id,
2791 SilcChannelEntry entry;
2795 SILC_LOG_DEBUG(("Creating new channel"));
2798 cipher = SILC_DEFAULT_CIPHER;
2800 hmac = SILC_DEFAULT_HMAC;
2802 /* Allocate cipher */
2803 if (!silc_cipher_alloc(cipher, &key))
2807 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2808 silc_cipher_free(key);
2812 channel_name = strdup(channel_name);
2814 /* Create the channel */
2815 entry = silc_idlist_add_channel(server->local_list, channel_name,
2816 SILC_CHANNEL_MODE_NONE, channel_id,
2817 NULL, key, newhmac);
2819 silc_free(channel_name);
2823 /* Now create the actual key material */
2824 if (!silc_server_create_channel_key(server, entry,
2825 silc_cipher_get_key_len(key) / 8)) {
2826 silc_free(channel_name);
2830 /* Notify other routers about the new channel. We send the packet
2831 to our primary route. */
2832 if (broadcast && server->standalone == FALSE)
2833 silc_server_send_new_channel(server, server->router->connection, TRUE,
2834 channel_name, entry->id,
2835 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2838 server->stat.my_channels++;
2843 /* Channel's key re-key timeout callback. */
2845 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2847 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2848 SilcServer server = (SilcServer)rekey->context;
2852 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2855 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2858 /* Generates new channel key. This is used to create the initial channel key
2859 but also to re-generate new key for channel. If `key_len' is provided
2860 it is the bytes of the key length. */
2862 bool silc_server_create_channel_key(SilcServer server,
2863 SilcChannelEntry channel,
2867 unsigned char channel_key[32], hash[32];
2870 SILC_LOG_DEBUG(("Generating channel key"));
2872 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2873 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2877 if (!channel->channel_key)
2878 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2883 else if (channel->key_len)
2884 len = channel->key_len / 8;
2886 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2888 /* Create channel key */
2889 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2892 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2894 /* Remove old key if exists */
2896 memset(channel->key, 0, channel->key_len / 8);
2897 silc_free(channel->key);
2901 channel->key_len = len * 8;
2902 channel->key = silc_calloc(len, sizeof(*channel->key));
2903 memcpy(channel->key, channel_key, len);
2904 memset(channel_key, 0, sizeof(channel_key));
2906 /* Generate HMAC key from the channel key data and set it */
2908 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2909 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2910 silc_hmac_set_key(channel->hmac, hash,
2911 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2912 memset(hash, 0, sizeof(hash));
2914 if (server->server_type == SILC_ROUTER) {
2915 if (!channel->rekey)
2916 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2917 channel->rekey->context = (void *)server;
2918 channel->rekey->channel = channel;
2919 channel->rekey->key_len = key_len;
2920 if (channel->rekey->task)
2921 silc_schedule_task_del(server->schedule, channel->rekey->task);
2923 channel->rekey->task =
2924 silc_schedule_task_add(server->schedule, 0,
2925 silc_server_channel_key_rekey,
2926 (void *)channel->rekey, 3600, 0,
2928 SILC_TASK_PRI_NORMAL);
2934 /* Saves the channel key found in the encoded `key_payload' buffer. This
2935 function is used when we receive Channel Key Payload and also when we're
2936 processing JOIN command reply. Returns entry to the channel. */
2938 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2939 SilcBuffer key_payload,
2940 SilcChannelEntry channel)
2942 SilcChannelKeyPayload payload = NULL;
2943 SilcChannelID *id = NULL;
2944 unsigned char *tmp, hash[32];
2948 SILC_LOG_DEBUG(("Start"));
2950 /* Decode channel key payload */
2951 payload = silc_channel_key_payload_parse(key_payload);
2953 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2958 /* Get the channel entry */
2961 /* Get channel ID */
2962 tmp = silc_channel_key_get_id(payload, &tmp_len);
2963 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2969 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2971 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2973 SILC_LOG_ERROR(("Received key for non-existent channel"));
2979 tmp = silc_channel_key_get_key(payload, &tmp_len);
2985 cipher = silc_channel_key_get_cipher(payload, NULL);
2991 /* Remove old key if exists */
2993 memset(channel->key, 0, channel->key_len / 8);
2994 silc_free(channel->key);
2995 silc_cipher_free(channel->channel_key);
2998 /* Create new cipher */
2999 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3004 if (channel->cipher)
3005 silc_free(channel->cipher);
3006 channel->cipher = strdup(cipher);
3009 channel->key_len = tmp_len * 8;
3010 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3011 memcpy(channel->key, tmp, tmp_len);
3012 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3014 /* Generate HMAC key from the channel key data and set it */
3016 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3017 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3018 silc_hmac_set_key(channel->hmac, hash,
3019 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3021 memset(hash, 0, sizeof(hash));
3022 memset(tmp, 0, tmp_len);
3024 if (server->server_type == SILC_ROUTER) {
3025 if (!channel->rekey)
3026 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3027 channel->rekey->context = (void *)server;
3028 channel->rekey->channel = channel;
3029 if (channel->rekey->task)
3030 silc_schedule_task_del(server->schedule, channel->rekey->task);
3032 channel->rekey->task =
3033 silc_schedule_task_add(server->schedule, 0,
3034 silc_server_channel_key_rekey,
3035 (void *)channel->rekey, 3600, 0,
3037 SILC_TASK_PRI_NORMAL);
3043 silc_channel_key_payload_free(payload);
3048 /* Heartbeat callback. This function is set as argument for the
3049 silc_socket_set_heartbeat function. The library will call this function
3050 at the set time interval. */
3052 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3055 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3057 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3060 /* Send the heartbeat */
3061 silc_server_send_heartbeat(hb->server, sock);
3064 /* Returns assembled of all servers in the given ID list. The packet's
3065 form is dictated by the New ID payload. */
3067 static void silc_server_announce_get_servers(SilcServer server,
3068 SilcServerEntry remote,
3070 SilcBuffer *servers,
3071 unsigned long creation_time)
3073 SilcIDCacheList list;
3074 SilcIDCacheEntry id_cache;
3075 SilcServerEntry entry;
3078 /* Go through all clients in the list */
3079 if (silc_idcache_get_all(id_list->servers, &list)) {
3080 if (silc_idcache_list_first(list, &id_cache)) {
3082 entry = (SilcServerEntry)id_cache->context;
3084 /* Do not announce the one we've sending our announcements and
3085 do not announce ourself. Also check the creation time if it's
3087 if ((entry == remote) || (entry == server->id_entry) ||
3088 (creation_time && entry->data.created < creation_time)) {
3089 if (!silc_idcache_list_next(list, &id_cache))
3094 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3096 *servers = silc_buffer_realloc(*servers,
3098 (*servers)->truelen + idp->len :
3100 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3101 silc_buffer_put(*servers, idp->data, idp->len);
3102 silc_buffer_pull(*servers, idp->len);
3103 silc_buffer_free(idp);
3105 if (!silc_idcache_list_next(list, &id_cache))
3110 silc_idcache_list_free(list);
3114 /* This function is used by router to announce existing servers to our
3115 primary router when we've connected to it. If `creation_time' is non-zero
3116 then only the servers that has been created after the `creation_time'
3117 will be announced. */
3119 void silc_server_announce_servers(SilcServer server, bool global,
3120 unsigned long creation_time,
3121 SilcSocketConnection remote)
3123 SilcBuffer servers = NULL;
3125 SILC_LOG_DEBUG(("Announcing servers"));
3127 /* Get servers in local list */
3128 silc_server_announce_get_servers(server, remote->user_data,
3129 server->local_list, &servers,
3133 /* Get servers in global list */
3134 silc_server_announce_get_servers(server, remote->user_data,
3135 server->global_list, &servers,
3139 silc_buffer_push(servers, servers->data - servers->head);
3140 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3142 /* Send the packet */
3143 silc_server_packet_send(server, remote,
3144 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3145 servers->data, servers->len, TRUE);
3147 silc_buffer_free(servers);
3151 /* Returns assembled packet of all clients in the given ID list. The
3152 packet's form is dictated by the New ID Payload. */
3154 static void silc_server_announce_get_clients(SilcServer server,
3156 SilcBuffer *clients,
3157 unsigned long creation_time)
3159 SilcIDCacheList list;
3160 SilcIDCacheEntry id_cache;
3161 SilcClientEntry client;
3164 /* Go through all clients in the list */
3165 if (silc_idcache_get_all(id_list->clients, &list)) {
3166 if (silc_idcache_list_first(list, &id_cache)) {
3168 client = (SilcClientEntry)id_cache->context;
3170 if (creation_time && client->data.created < creation_time) {
3171 if (!silc_idcache_list_next(list, &id_cache))
3176 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3178 *clients = silc_buffer_realloc(*clients,
3180 (*clients)->truelen + idp->len :
3182 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3183 silc_buffer_put(*clients, idp->data, idp->len);
3184 silc_buffer_pull(*clients, idp->len);
3185 silc_buffer_free(idp);
3187 if (!silc_idcache_list_next(list, &id_cache))
3192 silc_idcache_list_free(list);
3196 /* This function is used to announce our existing clients to our router
3197 when we've connected to it. If `creation_time' is non-zero then only
3198 the clients that has been created after the `creation_time' will be
3201 void silc_server_announce_clients(SilcServer server,
3202 unsigned long creation_time,
3203 SilcSocketConnection remote)
3205 SilcBuffer clients = NULL;
3207 SILC_LOG_DEBUG(("Announcing clients"));
3209 /* Get clients in local list */
3210 silc_server_announce_get_clients(server, server->local_list,
3211 &clients, creation_time);
3213 /* As router we announce our global list as well */
3214 if (server->server_type == SILC_ROUTER)
3215 silc_server_announce_get_clients(server, server->global_list,
3216 &clients, creation_time);
3219 silc_buffer_push(clients, clients->data - clients->head);
3220 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3222 /* Send the packet */
3223 silc_server_packet_send(server, remote,
3224 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3225 clients->data, clients->len, TRUE);
3227 silc_buffer_free(clients);
3232 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3238 p = silc_notify_payload_encode(notify, argc, ap);
3244 /* Returns assembled packets for channel users of the `channel'. */
3246 void silc_server_announce_get_channel_users(SilcServer server,
3247 SilcChannelEntry channel,
3248 SilcBuffer *channel_users,
3249 SilcBuffer *channel_users_modes)
3251 SilcChannelClientEntry chl;
3252 SilcHashTableList htl;
3253 SilcBuffer chidp, clidp;
3256 unsigned char mode[4];
3258 SILC_LOG_DEBUG(("Start"));
3260 /* Now find all users on the channel */
3261 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3262 silc_hash_table_list(channel->user_list, &htl);
3263 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3264 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3267 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3268 clidp->data, clidp->len,
3269 chidp->data, chidp->len);
3272 silc_buffer_realloc(*channel_users,
3274 (*channel_users)->truelen + len : len));
3275 silc_buffer_pull_tail(*channel_users,
3276 ((*channel_users)->end -
3277 (*channel_users)->data));
3279 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3280 silc_buffer_pull(*channel_users, len);
3281 silc_buffer_free(tmp);
3283 /* CUMODE notify for mode change on the channel */
3284 SILC_PUT32_MSB(chl->mode, mode);
3285 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3286 3, clidp->data, clidp->len,
3288 clidp->data, clidp->len);
3290 *channel_users_modes =
3291 silc_buffer_realloc(*channel_users_modes,
3292 (*channel_users_modes ?
3293 (*channel_users_modes)->truelen + len : len));
3294 silc_buffer_pull_tail(*channel_users_modes,
3295 ((*channel_users_modes)->end -
3296 (*channel_users_modes)->data));
3298 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3299 silc_buffer_pull(*channel_users_modes, len);
3300 silc_buffer_free(tmp);
3302 silc_buffer_free(clidp);
3304 silc_buffer_free(chidp);
3307 /* Returns assembled packets for all channels and users on those channels
3308 from the given ID List. The packets are in the form dictated by the
3309 New Channel and New Channel User payloads. */
3311 void silc_server_announce_get_channels(SilcServer server,
3313 SilcBuffer *channels,
3314 SilcBuffer *channel_users,
3315 SilcBuffer **channel_users_modes,
3316 uint32 *channel_users_modes_c,
3317 SilcChannelID ***channel_ids,
3318 unsigned long creation_time)
3320 SilcIDCacheList list;
3321 SilcIDCacheEntry id_cache;
3322 SilcChannelEntry channel;
3327 int i = *channel_users_modes_c;
3330 SILC_LOG_DEBUG(("Start"));
3332 /* Go through all channels in the list */
3333 if (silc_idcache_get_all(id_list->channels, &list)) {
3334 if (silc_idcache_list_first(list, &id_cache)) {
3336 channel = (SilcChannelEntry)id_cache->context;
3338 if (creation_time && channel->created < creation_time)
3343 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3344 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3345 name_len = strlen(channel->channel_name);
3348 len = 4 + name_len + id_len + 4;
3350 silc_buffer_realloc(*channels,
3351 (*channels ? (*channels)->truelen +
3353 silc_buffer_pull_tail(*channels,
3354 ((*channels)->end - (*channels)->data));
3355 silc_buffer_format(*channels,
3356 SILC_STR_UI_SHORT(name_len),
3357 SILC_STR_UI_XNSTRING(channel->channel_name,
3359 SILC_STR_UI_SHORT(id_len),
3360 SILC_STR_UI_XNSTRING(cid, id_len),
3361 SILC_STR_UI_INT(channel->mode),
3363 silc_buffer_pull(*channels, len);
3366 *channel_users_modes = silc_realloc(*channel_users_modes,
3367 sizeof(**channel_users_modes) *
3369 (*channel_users_modes)[i] = NULL;
3370 *channel_ids = silc_realloc(*channel_ids,
3371 sizeof(**channel_ids) * (i + 1));
3372 (*channel_ids)[i] = NULL;
3373 silc_server_announce_get_channel_users(server, channel,
3375 channel_users_modes[i]);
3376 (*channel_ids)[i] = channel->id;
3379 if (!silc_idcache_list_next(list, &id_cache))
3383 *channel_users_modes_c += i;
3386 silc_idcache_list_free(list);
3390 /* This function is used to announce our existing channels to our router
3391 when we've connected to it. This also announces the users on the
3392 channels to the router. If the `creation_time' is non-zero only the
3393 channels that was created after the `creation_time' are announced.
3394 Note that the channel users are still announced even if the `creation_time'
3397 void silc_server_announce_channels(SilcServer server,
3398 unsigned long creation_time,
3399 SilcSocketConnection remote)
3401 SilcBuffer channels = NULL, channel_users = NULL;
3402 SilcBuffer *channel_users_modes = NULL;
3403 uint32 channel_users_modes_c = 0;
3404 SilcChannelID **channel_ids = NULL;
3406 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3408 /* Get channels and channel users in local list */
3409 silc_server_announce_get_channels(server, server->local_list,
3410 &channels, &channel_users,
3411 &channel_users_modes,
3412 &channel_users_modes_c,
3413 &channel_ids, creation_time);
3415 /* Get channels and channel users in global list */
3416 silc_server_announce_get_channels(server, server->global_list,
3417 &channels, &channel_users,
3418 &channel_users_modes,
3419 &channel_users_modes_c,
3420 &channel_ids, creation_time);
3423 silc_buffer_push(channels, channels->data - channels->head);
3424 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3426 /* Send the packet */
3427 silc_server_packet_send(server, remote,
3428 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3429 channels->data, channels->len,
3432 silc_buffer_free(channels);
3435 if (channel_users) {
3436 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3437 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3438 channel_users->len);
3440 /* Send the packet */
3441 silc_server_packet_send(server, remote,
3442 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3443 channel_users->data, channel_users->len,
3446 silc_buffer_free(channel_users);
3449 if (channel_users_modes) {
3452 for (i = 0; i < channel_users_modes_c; i++) {
3453 silc_buffer_push(channel_users_modes[i],
3454 channel_users_modes[i]->data -
3455 channel_users_modes[i]->head);
3456 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3457 channel_users_modes[i]->len);
3458 silc_server_packet_send_dest(server, remote,
3459 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3460 channel_ids[i], SILC_ID_CHANNEL,
3461 channel_users_modes[i]->data,
3462 channel_users_modes[i]->len,
3464 silc_buffer_free(channel_users_modes[i]);
3466 silc_free(channel_users_modes);
3467 silc_free(channel_ids);
3471 /* Failure timeout callback. If this is called then we will immediately
3472 process the received failure. We always process the failure with timeout
3473 since we do not want to blindly trust to received failure packets.
3474 This won't be called (the timeout is cancelled) if the failure was
3475 bogus (it is bogus if remote does not close the connection after sending
3478 SILC_TASK_CALLBACK(silc_server_failure_callback)
3480 SilcServerFailureContext f = (SilcServerFailureContext)context;
3482 if (f->sock->protocol) {
3483 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3484 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3490 /* Assembles user list and users mode list from the `channel'. */
3492 void silc_server_get_users_on_channel(SilcServer server,
3493 SilcChannelEntry channel,
3494 SilcBuffer *user_list,
3495 SilcBuffer *mode_list,
3498 SilcChannelClientEntry chl;
3499 SilcHashTableList htl;
3500 SilcBuffer client_id_list;
3501 SilcBuffer client_mode_list;
3503 uint32 list_count = 0, len = 0;
3505 silc_hash_table_list(channel->user_list, &htl);
3506 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3507 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3509 client_id_list = silc_buffer_alloc(len);
3511 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3512 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3513 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3515 silc_hash_table_list(channel->user_list, &htl);
3516 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3518 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3519 silc_buffer_put(client_id_list, idp->data, idp->len);
3520 silc_buffer_pull(client_id_list, idp->len);
3521 silc_buffer_free(idp);
3523 /* Client's mode on channel */
3524 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3525 silc_buffer_pull(client_mode_list, 4);
3529 silc_buffer_push(client_id_list,
3530 client_id_list->data - client_id_list->head);
3531 silc_buffer_push(client_mode_list,
3532 client_mode_list->data - client_mode_list->head);
3534 *user_list = client_id_list;
3535 *mode_list = client_mode_list;
3536 *user_count = list_count;
3539 /* Saves users and their modes to the `channel'. */
3541 void silc_server_save_users_on_channel(SilcServer server,
3542 SilcSocketConnection sock,
3543 SilcChannelEntry channel,
3544 SilcClientID *noadd,
3545 SilcBuffer user_list,
3546 SilcBuffer mode_list,
3551 for (i = 0; i < user_count; i++) {
3554 SilcClientID *client_id;
3555 SilcClientEntry client;
3558 SILC_GET16_MSB(idp_len, user_list->data + 2);
3560 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3561 silc_buffer_pull(user_list, idp_len);
3566 SILC_GET32_MSB(mode, mode_list->data);
3567 silc_buffer_pull(mode_list, 4);
3569 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3570 silc_free(client_id);
3574 /* Check if we have this client cached already. */
3575 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3576 server->server_type, NULL);
3578 client = silc_idlist_find_client_by_id(server->global_list,
3579 client_id, server->server_type,
3582 /* If router did not find such Client ID in its lists then this must
3583 be bogus client or some router in the net is buggy. */
3584 if (server->server_type == SILC_ROUTER) {
3585 silc_free(client_id);
3589 /* We don't have that client anywhere, add it. The client is added
3590 to global list since server didn't have it in the lists so it must be
3592 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3593 silc_id_dup(client_id, SILC_ID_CLIENT),
3594 sock->user_data, NULL);
3596 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3597 silc_free(client_id);
3601 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3604 silc_free(client_id);
3606 if (!silc_server_client_on_channel(client, channel)) {
3607 /* Client was not on the channel, add it. */
3608 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3609 chl->client = client;
3611 chl->channel = channel;
3612 silc_hash_table_add(channel->user_list, chl->client, chl);
3613 silc_hash_table_add(client->channels, chl->channel, chl);
3618 /* Lookups route to the client indicated by the `id_data'. The connection
3619 object and internal data object is returned. Returns NULL if route
3620 could not be found to the client. If the `client_id' is specified then
3621 it is used and the `id_data' is ignored. */
3623 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3624 unsigned char *id_data,
3626 SilcClientID *client_id,
3627 SilcIDListData *idata)
3630 SilcClientEntry client;
3632 SILC_LOG_DEBUG(("Start"));
3634 /* Decode destination Client ID */
3636 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3638 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3642 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3645 /* If the destination belongs to our server we don't have to route
3646 the packet anywhere but to send it to the local destination. */
3647 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3651 /* If we are router and the client has router then the client is in
3652 our cell but not directly connected to us. */
3653 if (server->server_type == SILC_ROUTER && client->router) {
3654 /* We are of course in this case the client's router thus the route
3655 to the client is the server who owns the client. So, we will send
3656 the packet to that server. */
3658 *idata = (SilcIDListData)client->router;
3659 return client->router->connection;
3662 /* Seems that client really is directly connected to us */
3664 *idata = (SilcIDListData)client;
3665 return client->connection;
3668 /* Destination belongs to someone not in this server. If we are normal
3669 server our action is to send the packet to our router. */
3670 if (server->server_type != SILC_ROUTER && !server->standalone) {
3673 *idata = (SilcIDListData)server->router;
3674 return server->router->connection;
3677 /* We are router and we will perform route lookup for the destination
3678 and send the packet to fastest route. */
3679 if (server->server_type == SILC_ROUTER && !server->standalone) {
3680 /* Check first that the ID is valid */
3681 client = silc_idlist_find_client_by_id(server->global_list, id,
3684 SilcSocketConnection dst_sock;
3686 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3690 *idata = (SilcIDListData)dst_sock->user_data;
3699 /* Encodes and returns channel list of channels the `client' has joined.
3700 Secret channels are not put to the list. */
3702 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3703 SilcClientEntry client)
3705 SilcBuffer buffer = NULL;
3706 SilcChannelEntry channel;
3707 SilcChannelClientEntry chl;
3708 SilcHashTableList htl;
3714 silc_hash_table_list(client->channels, &htl);
3715 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3716 channel = chl->channel;
3718 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3719 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3722 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3723 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3724 name_len = strlen(channel->channel_name);
3726 len = 4 + name_len + id_len + 4;
3727 buffer = silc_buffer_realloc(buffer,
3728 (buffer ? (buffer)->truelen + len : len));
3729 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3730 silc_buffer_format(buffer,
3731 SILC_STR_UI_SHORT(name_len),
3732 SILC_STR_UI_XNSTRING(channel->channel_name,
3734 SILC_STR_UI_SHORT(id_len),
3735 SILC_STR_UI_XNSTRING(cid, id_len),
3736 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3738 silc_buffer_pull(buffer, len);
3743 silc_buffer_push(buffer, buffer->data - buffer->head);
3748 /* Finds client entry by Client ID and if it is not found then resolves
3749 it using WHOIS command. */
3751 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3752 SilcClientID *client_id)
3754 SilcClientEntry client;
3756 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3759 client = silc_idlist_find_client_by_id(server->global_list,
3760 client_id, TRUE, NULL);
3761 if (!client && server->server_type == SILC_ROUTER)
3765 if (!client && server->standalone)
3768 if (!client || !client->nickname || !client->username) {
3769 SilcBuffer buffer, idp;
3771 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3772 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3773 client->resolve_cmd_ident = ++server->cmd_ident;
3775 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3776 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3777 server->cmd_ident, 1,
3778 3, idp->data, idp->len);
3779 silc_server_packet_send(server, client ? client->router->connection :
3780 server->router->connection,
3781 SILC_PACKET_COMMAND, 0,
3782 buffer->data, buffer->len, FALSE);
3783 silc_buffer_free(idp);
3784 silc_buffer_free(buffer);
3791 /* A timeout callback for the re-key. We will be the initiator of the
3794 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3796 SilcSocketConnection sock = (SilcSocketConnection)context;
3797 SilcIDListData idata = (SilcIDListData)sock->user_data;
3798 SilcServer server = (SilcServer)idata->rekey->context;
3799 SilcProtocol protocol;
3800 SilcServerRekeyInternalContext *proto_ctx;
3802 SILC_LOG_DEBUG(("Start"));
3804 /* Allocate internal protocol context. This is sent as context
3806 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3807 proto_ctx->server = (void *)server;
3808 proto_ctx->sock = sock;
3809 proto_ctx->responder = FALSE;
3810 proto_ctx->pfs = idata->rekey->pfs;
3812 /* Perform rekey protocol. Will call the final callback after the
3813 protocol is over. */
3814 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3815 &protocol, proto_ctx, silc_server_rekey_final);
3816 sock->protocol = protocol;
3818 /* Run the protocol */
3819 silc_protocol_execute(protocol, server->schedule, 0, 0);
3821 /* Re-register re-key timeout */
3822 silc_schedule_task_add(server->schedule, sock->sock,
3823 silc_server_rekey_callback,
3824 context, idata->rekey->timeout, 0,
3825 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3828 /* The final callback for the REKEY protocol. This will actually take the
3829 new key material into use. */
3831 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3833 SilcProtocol protocol = (SilcProtocol)context;
3834 SilcServerRekeyInternalContext *ctx =
3835 (SilcServerRekeyInternalContext *)protocol->context;
3836 SilcServer server = (SilcServer)ctx->server;
3837 SilcSocketConnection sock = ctx->sock;
3839 SILC_LOG_DEBUG(("Start"));
3841 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3842 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3843 /* Error occured during protocol */
3844 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3845 silc_protocol_cancel(protocol, server->schedule);
3846 silc_protocol_free(protocol);
3847 sock->protocol = NULL;
3849 silc_packet_context_free(ctx->packet);
3851 silc_ske_free(ctx->ske);
3856 /* Purge the outgoing data queue to assure that all rekey packets really
3857 go to the network before we quit the protocol. */
3858 silc_server_packet_queue_purge(server, sock);
3861 silc_protocol_free(protocol);
3862 sock->protocol = NULL;
3864 silc_packet_context_free(ctx->packet);
3866 silc_ske_free(ctx->ske);