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);
1274 silc_schedule_task_del_by_callback(server->schedule,
1275 silc_server_failure_callback);
1276 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1277 "Authentication failed");
1278 server->stat.auth_failures++;
1282 entry->data.last_receive = time(NULL);
1284 switch (ctx->conn_type) {
1285 case SILC_SOCKET_TYPE_CLIENT:
1287 SilcClientEntry client;
1289 SILC_LOG_DEBUG(("Remote host is client"));
1290 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1293 /* Add the client to the client ID cache. The nickname and Client ID
1294 and other information is created after we have received NEW_CLIENT
1295 packet from client. */
1296 client = silc_idlist_add_client(server->local_list,
1297 NULL, NULL, NULL, NULL, NULL, sock);
1299 SILC_LOG_ERROR(("Could not add new client to cache"));
1300 silc_free(sock->user_data);
1301 silc_server_disconnect_remote(server, sock,
1302 "Server closed connection: "
1303 "Authentication failed");
1304 server->stat.auth_failures++;
1309 server->stat.my_clients++;
1310 server->stat.clients++;
1311 if (server->server_type == SILC_ROUTER)
1312 server->stat.cell_clients++;
1314 id_entry = (void *)client;
1317 case SILC_SOCKET_TYPE_SERVER:
1318 case SILC_SOCKET_TYPE_ROUTER:
1320 SilcServerEntry new_server;
1321 SilcServerConfigSectionServerConnection *conn =
1322 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1323 ctx->sconfig : ctx->rconfig;
1325 SILC_LOG_DEBUG(("Remote host is %s",
1326 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1327 "server" : (conn->backup_router ?
1328 "backup router" : "router")));
1329 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1330 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1331 "server" : (conn->backup_router ?
1332 "backup router" : "router")));
1334 /* Add the server into server cache. The server name and Server ID
1335 is updated after we have received NEW_SERVER packet from the
1336 server. We mark ourselves as router for this server if we really
1339 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1340 server->local_list : (conn->backup_router ?
1341 server->local_list :
1342 server->global_list)),
1344 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1345 SILC_SERVER : SILC_ROUTER),
1347 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1348 server->id_entry : (conn->backup_router ?
1349 server->id_entry : NULL)),
1352 SILC_LOG_ERROR(("Could not add new server to cache"));
1353 silc_free(sock->user_data);
1354 silc_server_disconnect_remote(server, sock,
1355 "Server closed connection: "
1356 "Authentication failed");
1357 server->stat.auth_failures++;
1362 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1363 server->stat.my_servers++;
1365 server->stat.my_routers++;
1366 server->stat.servers++;
1368 id_entry = (void *)new_server;
1370 /* If the incoming connection is router and marked as backup router
1371 then add it to be one of our backups */
1372 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1373 silc_server_backup_add(server, new_server, conn->backup_replace_ip,
1374 conn->backup_replace_port, conn->backup_local);
1376 /* Change it back to SERVER type since that's what it really is. */
1377 if (conn->backup_local)
1378 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1380 new_server->server_type = SILC_BACKUP_ROUTER;
1383 /* Check whether this connection is to be our primary router connection
1384 if we do not already have the primary route. */
1385 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1386 if (silc_server_config_is_primary_route(server->config) &&
1390 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1391 server->standalone = FALSE;
1392 if (!server->id_entry->router) {
1393 server->id_entry->router = id_entry;
1394 server->router = id_entry;
1404 sock->type = ctx->conn_type;
1406 /* Add the common data structure to the ID entry. */
1408 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1410 /* Add to sockets internal pointer for fast referencing */
1411 silc_free(sock->user_data);
1412 sock->user_data = id_entry;
1414 /* Connection has been fully established now. Everything is ok. */
1415 SILC_LOG_DEBUG(("New connection authenticated"));
1417 /* Perform keepalive. The `hb_context' will be freed automatically
1418 when finally calling the silc_socket_free function. XXX hardcoded
1420 hb_context = silc_calloc(1, sizeof(*hb_context));
1421 hb_context->server = server;
1422 silc_socket_set_heartbeat(sock, 600, hb_context,
1423 silc_server_perform_heartbeat,
1427 silc_schedule_task_del_by_callback(server->schedule,
1428 silc_server_failure_callback);
1429 silc_protocol_free(protocol);
1431 silc_packet_context_free(ctx->packet);
1433 silc_ske_free(ctx->ske);
1434 silc_free(ctx->dest_id);
1436 sock->protocol = NULL;
1439 /* This function is used to read packets from network and send packets to
1440 network. This is usually a generic task. */
1442 SILC_TASK_CALLBACK(silc_server_packet_process)
1444 SilcServer server = (SilcServer)context;
1445 SilcSocketConnection sock = server->sockets[fd];
1446 SilcIDListData idata;
1447 SilcCipher cipher = NULL;
1448 SilcHmac hmac = NULL;
1449 uint32 sequence = 0;
1455 SILC_LOG_DEBUG(("Processing packet"));
1457 /* Packet sending */
1459 if (type == SILC_TASK_WRITE) {
1460 /* Do not send data to disconnected connection */
1461 if (SILC_IS_DISCONNECTED(sock))
1464 server->stat.packets_sent++;
1466 if (sock->outbuf->data - sock->outbuf->head)
1467 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1469 /* Send the packet */
1470 ret = silc_packet_send(sock, TRUE);
1472 /* If returned -2 could not write to connection now, will do
1478 SILC_LOG_ERROR(("Error sending packet to connection "
1479 "%s:%d [%s]", sock->hostname, sock->port,
1480 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1481 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1482 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1487 /* The packet has been sent and now it is time to set the connection
1488 back to only for input. When there is again some outgoing data
1489 available for this connection it will be set for output as well.
1490 This call clears the output setting and sets it only for input. */
1491 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1492 SILC_UNSET_OUTBUF_PENDING(sock);
1494 silc_buffer_clear(sock->outbuf);
1498 /* Packet receiving */
1500 /* Read some data from connection */
1501 ret = silc_packet_receive(sock);
1505 SILC_LOG_ERROR(("Error receiving packet from connection "
1506 "%s:%d [%s]", sock->hostname, sock->port,
1507 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1508 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1509 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1516 SILC_LOG_DEBUG(("Read EOF"));
1518 /* If connection is disconnecting already we will finally
1519 close the connection */
1520 if (SILC_IS_DISCONNECTING(sock)) {
1521 if (sock->user_data)
1522 silc_server_free_sock_user_data(server, sock);
1523 silc_server_close_connection(server, sock);
1527 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1528 SILC_SET_DISCONNECTING(sock);
1530 if (sock->user_data)
1531 silc_server_free_sock_user_data(server, sock);
1532 silc_server_close_connection(server, sock);
1536 /* If connection is disconnecting or disconnected we will ignore
1538 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1539 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1543 server->stat.packets_received++;
1545 /* Get keys and stuff from ID entry */
1546 idata = (SilcIDListData)sock->user_data;
1548 cipher = idata->receive_key;
1549 hmac = idata->hmac_receive;
1550 sequence = idata->psn_receive;
1553 /* Process the packet. This will call the parser that will then
1554 decrypt and parse the packet. */
1555 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1556 TRUE : FALSE, cipher, hmac, sequence,
1557 silc_server_packet_parse, server);
1560 /* Parses whole packet, received earlier. */
1562 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1564 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1565 SilcServer server = (SilcServer)parse_ctx->context;
1566 SilcSocketConnection sock = parse_ctx->sock;
1567 SilcPacketContext *packet = parse_ctx->packet;
1568 SilcIDListData idata = (SilcIDListData)sock->user_data;
1571 SILC_LOG_DEBUG(("Start"));
1573 /* Parse the packet */
1574 if (parse_ctx->normal)
1575 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1577 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1579 /* If entry is disabled ignore what we got. */
1580 if (ret != SILC_PACKET_RESUME_ROUTER &&
1581 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1582 SILC_LOG_DEBUG(("Connection is disabled"));
1586 if (ret == SILC_PACKET_NONE)
1589 /* Check that the the current client ID is same as in the client's packet. */
1590 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1591 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1592 if (client && client->id) {
1593 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1594 packet->src_id_type);
1595 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1603 if (server->server_type == SILC_ROUTER) {
1604 /* Route the packet if it is not destined to us. Other ID types but
1605 server are handled separately after processing them. */
1606 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1607 packet->dst_id_type == SILC_ID_SERVER &&
1608 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1609 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1611 /* Route the packet to fastest route for the destination ID */
1612 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1613 packet->dst_id_type);
1616 silc_server_packet_route(server,
1617 silc_server_route_get(server, id,
1618 packet->dst_id_type),
1625 /* Parse the incoming packet type */
1626 silc_server_packet_parse_type(server, sock, packet);
1628 if (server->server_type == SILC_ROUTER) {
1629 /* Broadcast packet if it is marked as broadcast packet and it is
1630 originated from router and we are router. */
1631 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1632 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1633 !server->standalone) {
1634 /* Broadcast to our primary route */
1635 silc_server_packet_broadcast(server, server->router->connection, packet);
1637 /* If we have backup routers then we need to feed all broadcast
1638 data to those servers. */
1639 silc_server_backup_broadcast(server, sock, packet);
1644 silc_packet_context_free(packet);
1645 silc_free(parse_ctx);
1648 /* Parser callback called by silc_packet_receive_process. This merely
1649 registers timeout that will handle the actual parsing when appropriate. */
1651 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1654 SilcServer server = (SilcServer)context;
1655 SilcSocketConnection sock = parser_context->sock;
1656 SilcIDListData idata = (SilcIDListData)sock->user_data;
1659 idata->psn_receive = parser_context->packet->sequence + 1;
1661 /* If protocol for this connection is key exchange or rekey then we'll
1662 process all packets synchronously, since there might be packets in
1663 queue that we are not able to decrypt without first processing the
1664 packets before them. */
1665 if (sock->protocol && sock->protocol->protocol &&
1666 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1667 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1668 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1671 /* Reprocess data since we'll return FALSE here. This is because
1672 the idata->receive_key might have become valid in the last packet
1673 and we want to call this processor with valid cipher. */
1675 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1676 TRUE : FALSE, idata->receive_key,
1677 idata->hmac_receive, idata->psn_receive,
1678 silc_server_packet_parse, server);
1680 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1681 TRUE : FALSE, NULL, NULL, 0,
1682 silc_server_packet_parse, server);
1686 switch (sock->type) {
1687 case SILC_SOCKET_TYPE_UNKNOWN:
1688 case SILC_SOCKET_TYPE_CLIENT:
1689 /* Parse the packet with timeout */
1690 silc_schedule_task_add(server->schedule, sock->sock,
1691 silc_server_packet_parse_real,
1692 (void *)parser_context, 0, 100000,
1694 SILC_TASK_PRI_NORMAL);
1696 case SILC_SOCKET_TYPE_SERVER:
1697 case SILC_SOCKET_TYPE_ROUTER:
1698 /* Packets from servers are parsed immediately */
1699 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1709 /* Parses the packet type and calls what ever routines the packet type
1710 requires. This is done for all incoming packets. */
1712 void silc_server_packet_parse_type(SilcServer server,
1713 SilcSocketConnection sock,
1714 SilcPacketContext *packet)
1716 SilcPacketType type = packet->type;
1717 SilcIDListData idata = (SilcIDListData)sock->user_data;
1719 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1721 /* Parse the packet type */
1723 case SILC_PACKET_DISCONNECT:
1724 SILC_LOG_DEBUG(("Disconnect packet"));
1725 if (packet->flags & SILC_PACKET_FLAG_LIST)
1729 case SILC_PACKET_SUCCESS:
1731 * Success received for something. For now we can have only
1732 * one protocol for connection executing at once hence this
1733 * success message is for whatever protocol is executing currently.
1735 SILC_LOG_DEBUG(("Success packet"));
1736 if (packet->flags & SILC_PACKET_FLAG_LIST)
1739 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1742 case SILC_PACKET_FAILURE:
1744 * Failure received for something. For now we can have only
1745 * one protocol for connection executing at once hence this
1746 * failure message is for whatever protocol is executing currently.
1748 SILC_LOG_DEBUG(("Failure packet"));
1749 if (packet->flags & SILC_PACKET_FLAG_LIST)
1751 if (sock->protocol) {
1752 SilcServerFailureContext f;
1753 f = silc_calloc(1, sizeof(*f));
1757 /* We will wait 5 seconds to process this failure packet */
1758 silc_schedule_task_add(server->schedule, sock->sock,
1759 silc_server_failure_callback, (void *)f, 5, 0,
1760 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1764 case SILC_PACKET_REJECT:
1765 SILC_LOG_DEBUG(("Reject packet"));
1766 if (packet->flags & SILC_PACKET_FLAG_LIST)
1771 case SILC_PACKET_NOTIFY:
1773 * Received notify packet. Server can receive notify packets from
1774 * router. Server then relays the notify messages to clients if needed.
1776 SILC_LOG_DEBUG(("Notify packet"));
1777 if (packet->flags & SILC_PACKET_FLAG_LIST)
1778 silc_server_notify_list(server, sock, packet);
1780 silc_server_notify(server, sock, packet);
1786 case SILC_PACKET_CHANNEL_MESSAGE:
1788 * Received channel message. Channel messages are special packets
1789 * (although probably most common ones) thus they are handled
1792 SILC_LOG_DEBUG(("Channel Message packet"));
1793 if (packet->flags & SILC_PACKET_FLAG_LIST)
1795 idata->last_receive = time(NULL);
1796 silc_server_channel_message(server, sock, packet);
1799 case SILC_PACKET_CHANNEL_KEY:
1801 * Received key for channel. As channels are created by the router
1802 * the keys are as well. We will distribute the key to all of our
1803 * locally connected clients on the particular channel. Router
1804 * never receives this channel and thus is ignored.
1806 SILC_LOG_DEBUG(("Channel Key packet"));
1807 if (packet->flags & SILC_PACKET_FLAG_LIST)
1809 silc_server_channel_key(server, sock, packet);
1815 case SILC_PACKET_COMMAND:
1817 * Recived command. Processes the command request and allocates the
1818 * command context and calls the command.
1820 SILC_LOG_DEBUG(("Command packet"));
1821 if (packet->flags & SILC_PACKET_FLAG_LIST)
1823 silc_server_command_process(server, sock, packet);
1826 case SILC_PACKET_COMMAND_REPLY:
1828 * Received command reply packet. Received command reply to command. It
1829 * may be reply to command sent by us or reply to command sent by client
1830 * that we've routed further.
1832 SILC_LOG_DEBUG(("Command Reply packet"));
1833 if (packet->flags & SILC_PACKET_FLAG_LIST)
1835 silc_server_command_reply(server, sock, packet);
1839 * Private Message packets
1841 case SILC_PACKET_PRIVATE_MESSAGE:
1843 * Received private message packet. The packet is coming from either
1846 SILC_LOG_DEBUG(("Private Message packet"));
1847 if (packet->flags & SILC_PACKET_FLAG_LIST)
1849 idata->last_receive = time(NULL);
1850 silc_server_private_message(server, sock, packet);
1853 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1855 * Private message key packet.
1857 if (packet->flags & SILC_PACKET_FLAG_LIST)
1859 silc_server_private_message_key(server, sock, packet);
1863 * Key Exchange protocol packets
1865 case SILC_PACKET_KEY_EXCHANGE:
1866 SILC_LOG_DEBUG(("KE packet"));
1867 if (packet->flags & SILC_PACKET_FLAG_LIST)
1870 if (sock->protocol && sock->protocol->protocol &&
1871 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1873 SilcServerKEInternalContext *proto_ctx =
1874 (SilcServerKEInternalContext *)sock->protocol->context;
1876 proto_ctx->packet = silc_packet_context_dup(packet);
1878 /* Let the protocol handle the packet */
1879 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1881 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1882 "protocol active, packet dropped."));
1886 case SILC_PACKET_KEY_EXCHANGE_1:
1887 SILC_LOG_DEBUG(("KE 1 packet"));
1888 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 if (sock->protocol && sock->protocol->protocol &&
1892 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1893 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1895 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1896 SilcServerRekeyInternalContext *proto_ctx =
1897 (SilcServerRekeyInternalContext *)sock->protocol->context;
1899 if (proto_ctx->packet)
1900 silc_packet_context_free(proto_ctx->packet);
1902 proto_ctx->packet = silc_packet_context_dup(packet);
1904 /* Let the protocol handle the packet */
1905 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1907 SilcServerKEInternalContext *proto_ctx =
1908 (SilcServerKEInternalContext *)sock->protocol->context;
1910 if (proto_ctx->packet)
1911 silc_packet_context_free(proto_ctx->packet);
1913 proto_ctx->packet = silc_packet_context_dup(packet);
1914 proto_ctx->dest_id_type = packet->src_id_type;
1915 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1916 packet->src_id_type);
1917 if (!proto_ctx->dest_id)
1920 /* Let the protocol handle the packet */
1921 silc_protocol_execute(sock->protocol, server->schedule,
1925 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1926 "protocol active, packet dropped."));
1930 case SILC_PACKET_KEY_EXCHANGE_2:
1931 SILC_LOG_DEBUG(("KE 2 packet"));
1932 if (packet->flags & SILC_PACKET_FLAG_LIST)
1935 if (sock->protocol && sock->protocol->protocol &&
1936 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1937 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1939 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1940 SilcServerRekeyInternalContext *proto_ctx =
1941 (SilcServerRekeyInternalContext *)sock->protocol->context;
1943 if (proto_ctx->packet)
1944 silc_packet_context_free(proto_ctx->packet);
1946 proto_ctx->packet = silc_packet_context_dup(packet);
1948 /* Let the protocol handle the packet */
1949 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1951 SilcServerKEInternalContext *proto_ctx =
1952 (SilcServerKEInternalContext *)sock->protocol->context;
1954 if (proto_ctx->packet)
1955 silc_packet_context_free(proto_ctx->packet);
1957 proto_ctx->packet = silc_packet_context_dup(packet);
1958 proto_ctx->dest_id_type = packet->src_id_type;
1959 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1960 packet->src_id_type);
1961 if (!proto_ctx->dest_id)
1964 /* Let the protocol handle the packet */
1965 silc_protocol_execute(sock->protocol, server->schedule,
1969 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1970 "protocol active, packet dropped."));
1974 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1976 * Connection authentication request packet. When we receive this packet
1977 * we will send to the other end information about our mandatory
1978 * authentication method for the connection. This packet maybe received
1981 SILC_LOG_DEBUG(("Connection authentication request packet"));
1982 if (packet->flags & SILC_PACKET_FLAG_LIST)
1984 silc_server_connection_auth_request(server, sock, packet);
1988 * Connection Authentication protocol packets
1990 case SILC_PACKET_CONNECTION_AUTH:
1991 /* Start of the authentication protocol. We receive here the
1992 authentication data and will verify it. */
1993 SILC_LOG_DEBUG(("Connection auth packet"));
1994 if (packet->flags & SILC_PACKET_FLAG_LIST)
1997 if (sock->protocol && sock->protocol->protocol->type
1998 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2000 SilcServerConnAuthInternalContext *proto_ctx =
2001 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2003 proto_ctx->packet = silc_packet_context_dup(packet);
2005 /* Let the protocol handle the packet */
2006 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2008 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2009 "protocol active, packet dropped."));
2013 case SILC_PACKET_NEW_ID:
2015 * Received New ID packet. This includes some new ID that has been
2016 * created. It may be for client, server or channel. This is the way
2017 * to distribute information about new registered entities in the
2020 SILC_LOG_DEBUG(("New ID packet"));
2021 if (packet->flags & SILC_PACKET_FLAG_LIST)
2022 silc_server_new_id_list(server, sock, packet);
2024 silc_server_new_id(server, sock, packet);
2027 case SILC_PACKET_NEW_CLIENT:
2029 * Received new client packet. This includes client information that
2030 * we will use to create initial client ID. After creating new
2031 * ID we will send it to the client.
2033 SILC_LOG_DEBUG(("New Client packet"));
2034 if (packet->flags & SILC_PACKET_FLAG_LIST)
2036 silc_server_new_client(server, sock, packet);
2039 case SILC_PACKET_NEW_SERVER:
2041 * Received new server packet. This includes Server ID and some other
2042 * information that we may save. This is received after server has
2045 SILC_LOG_DEBUG(("New Server packet"));
2046 if (packet->flags & SILC_PACKET_FLAG_LIST)
2048 silc_server_new_server(server, sock, packet);
2051 case SILC_PACKET_NEW_CHANNEL:
2053 * Received new channel packet. Information about new channel in the
2054 * network are distributed using this packet.
2056 SILC_LOG_DEBUG(("New Channel packet"));
2057 if (packet->flags & SILC_PACKET_FLAG_LIST)
2058 silc_server_new_channel_list(server, sock, packet);
2060 silc_server_new_channel(server, sock, packet);
2063 case SILC_PACKET_HEARTBEAT:
2065 * Received heartbeat.
2067 SILC_LOG_DEBUG(("Heartbeat packet"));
2068 if (packet->flags & SILC_PACKET_FLAG_LIST)
2072 case SILC_PACKET_KEY_AGREEMENT:
2074 * Received heartbeat.
2076 SILC_LOG_DEBUG(("Key agreement packet"));
2077 if (packet->flags & SILC_PACKET_FLAG_LIST)
2079 silc_server_key_agreement(server, sock, packet);
2082 case SILC_PACKET_REKEY:
2084 * Received re-key packet. The sender wants to regenerate the session
2087 SILC_LOG_DEBUG(("Re-key packet"));
2088 if (packet->flags & SILC_PACKET_FLAG_LIST)
2090 silc_server_rekey(server, sock, packet);
2093 case SILC_PACKET_REKEY_DONE:
2095 * The re-key is done.
2097 SILC_LOG_DEBUG(("Re-key done packet"));
2098 if (packet->flags & SILC_PACKET_FLAG_LIST)
2101 if (sock->protocol && sock->protocol->protocol &&
2102 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2104 SilcServerRekeyInternalContext *proto_ctx =
2105 (SilcServerRekeyInternalContext *)sock->protocol->context;
2107 if (proto_ctx->packet)
2108 silc_packet_context_free(proto_ctx->packet);
2110 proto_ctx->packet = silc_packet_context_dup(packet);
2112 /* Let the protocol handle the packet */
2113 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2115 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2116 "protocol active, packet dropped."));
2120 case SILC_PACKET_FTP:
2122 SILC_LOG_DEBUG(("FTP packet"));
2123 if (packet->flags & SILC_PACKET_FLAG_LIST)
2125 silc_server_ftp(server, sock, packet);
2128 case SILC_PACKET_RESUME_ROUTER:
2129 /* Resume router packet received. This packet is received for backup
2130 router resuming protocol. */
2131 SILC_LOG_DEBUG(("Resume router packet"));
2132 if (packet->flags & SILC_PACKET_FLAG_LIST)
2134 silc_server_backup_resume_router(server, sock, packet);
2138 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2144 /* Creates connection to a remote router. */
2146 void silc_server_create_connection(SilcServer server,
2147 char *remote_host, uint32 port)
2149 SilcServerConnection sconn;
2151 /* Allocate connection object for hold connection specific stuff. */
2152 sconn = silc_calloc(1, sizeof(*sconn));
2153 sconn->server = server;
2154 sconn->remote_host = strdup(remote_host);
2155 sconn->remote_port = port;
2157 silc_schedule_task_add(server->schedule, 0,
2158 silc_server_connect_router,
2159 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2160 SILC_TASK_PRI_NORMAL);
2163 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2165 silc_socket_free((SilcSocketConnection)context);
2168 /* Closes connection to socket connection */
2170 void silc_server_close_connection(SilcServer server,
2171 SilcSocketConnection sock)
2173 if (!server->sockets[sock->sock])
2176 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2178 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2179 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2180 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2183 /* We won't listen for this connection anymore */
2184 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2186 /* Unregister all tasks */
2187 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2189 /* Close the actual connection */
2190 silc_net_close_connection(sock->sock);
2191 server->sockets[sock->sock] = NULL;
2193 /* If sock->user_data is NULL then we'll check for active protocols
2194 here since the silc_server_free_sock_user_data has not been called
2195 for this connection. */
2196 if (!sock->user_data) {
2197 /* If any protocol is active cancel its execution. It will call
2198 the final callback which will finalize the disconnection. */
2199 if (sock->protocol) {
2200 silc_protocol_cancel(sock->protocol, server->schedule);
2201 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2202 silc_protocol_execute_final(sock->protocol, server->schedule);
2203 sock->protocol = NULL;
2208 silc_schedule_task_add(server->schedule, 0,
2209 silc_server_close_connection_final,
2210 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2211 SILC_TASK_PRI_NORMAL);
2214 /* Sends disconnect message to remote connection and disconnects the
2217 void silc_server_disconnect_remote(SilcServer server,
2218 SilcSocketConnection sock,
2219 const char *fmt, ...)
2222 unsigned char buf[4096];
2227 memset(buf, 0, sizeof(buf));
2229 vsprintf(buf, fmt, ap);
2232 SILC_LOG_DEBUG(("Disconnecting remote host"));
2234 /* Notify remote end that the conversation is over. The notify message
2235 is tried to be sent immediately. */
2236 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2237 buf, strlen(buf), TRUE);
2239 /* Mark the connection to be disconnected */
2240 SILC_SET_DISCONNECTED(sock);
2241 silc_server_close_connection(server, sock);
2246 SilcClientEntry client;
2247 } *FreeClientInternal;
2249 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2251 FreeClientInternal i = (FreeClientInternal)context;
2253 silc_idlist_del_data(i->client);
2254 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2258 /* Frees client data and notifies about client's signoff. */
2260 void silc_server_free_client_data(SilcServer server,
2261 SilcSocketConnection sock,
2262 SilcClientEntry client,
2266 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2268 /* If there is pending outgoing data for the client then purge it
2269 to the network before removing the client entry. */
2270 silc_server_packet_queue_purge(server, sock);
2275 /* Send SIGNOFF notify to routers. */
2276 if (notify && !server->standalone && server->router)
2277 silc_server_send_notify_signoff(server, server->router->connection,
2278 server->server_type == SILC_SERVER ?
2279 FALSE : TRUE, client->id, signoff);
2281 /* Remove client from all channels */
2283 silc_server_remove_from_channels(server, NULL, client,
2284 TRUE, signoff, TRUE);
2286 silc_server_remove_from_channels(server, NULL, client,
2287 FALSE, NULL, FALSE);
2289 /* We will not delete the client entry right away. We will take it
2290 into history (for WHOWAS command) for 5 minutes */
2293 silc_schedule_task_add(server->schedule, 0,
2294 silc_server_free_client_data_timeout,
2296 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2297 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2298 client->router = NULL;
2299 client->connection = NULL;
2301 /* Free the client entry and everything in it */
2302 server->stat.my_clients--;
2303 server->stat.clients--;
2304 if (server->server_type == SILC_ROUTER)
2305 server->stat.cell_clients--;
2308 /* Frees user_data pointer from socket connection object. This also sends
2309 appropriate notify packets to the network to inform about leaving
2312 void silc_server_free_sock_user_data(SilcServer server,
2313 SilcSocketConnection sock)
2315 SILC_LOG_DEBUG(("Start"));
2317 switch (sock->type) {
2318 case SILC_SOCKET_TYPE_CLIENT:
2320 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2321 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2324 case SILC_SOCKET_TYPE_SERVER:
2325 case SILC_SOCKET_TYPE_ROUTER:
2327 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2328 SilcServerEntry backup_router = NULL;
2331 backup_router = silc_server_backup_get(server, user_data->id);
2333 /* If this was our primary router connection then we're lost to
2334 the outside world. */
2335 if (server->router == user_data) {
2336 /* Check whether we have a backup router connection */
2337 if (!backup_router || backup_router == user_data) {
2338 silc_schedule_task_add(server->schedule, 0,
2339 silc_server_connect_to_router,
2342 SILC_TASK_PRI_NORMAL);
2344 server->id_entry->router = NULL;
2345 server->router = NULL;
2346 server->standalone = TRUE;
2347 backup_router = NULL;
2349 SILC_LOG_INFO(("New primary router is backup router %s",
2350 backup_router->server_name));
2351 SILC_LOG_DEBUG(("New primary router is backup router %s",
2352 backup_router->server_name));
2353 server->id_entry->router = backup_router;
2354 server->router = backup_router;
2355 server->router_connect = time(0);
2356 server->backup_primary = TRUE;
2357 if (server->server_type == SILC_BACKUP_ROUTER) {
2358 server->server_type = SILC_ROUTER;
2360 /* We'll need to constantly try to reconnect to the primary
2361 router so that we'll see when it comes back online. */
2362 silc_server_backup_reconnect(server, sock->ip, sock->port,
2363 silc_server_backup_connected,
2367 /* Mark this connection as replaced */
2368 silc_server_backup_replaced_add(server, user_data->id,
2371 } else if (backup_router) {
2372 SILC_LOG_INFO(("Enabling the use of backup router %s",
2373 backup_router->server_name));
2374 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2375 backup_router->server_name));
2377 /* Mark this connection as replaced */
2378 silc_server_backup_replaced_add(server, user_data->id,
2382 if (!backup_router) {
2383 /* Free all client entries that this server owns as they will
2384 become invalid now as well. */
2386 silc_server_remove_clients_by_server(server, user_data, TRUE);
2388 /* Update the client entries of this server to the new backup
2389 router. This also removes the clients that *really* was owned
2390 by the primary router and went down with the router. */
2391 silc_server_update_clients_by_server(server, user_data, backup_router,
2393 silc_server_update_servers_by_server(server, user_data, backup_router);
2396 /* Free the server entry */
2397 silc_server_backup_del(server, user_data);
2398 silc_server_backup_replaced_del(server, user_data);
2399 silc_idlist_del_data(user_data);
2400 if (!silc_idlist_del_server(server->local_list, user_data))
2401 silc_idlist_del_server(server->global_list, user_data);
2402 server->stat.my_servers--;
2403 server->stat.servers--;
2404 if (server->server_type == SILC_ROUTER)
2405 server->stat.cell_servers--;
2407 if (backup_router) {
2408 /* Announce all of our stuff that was created about 5 minutes ago.
2409 The backup router knows all the other stuff already. */
2410 if (server->server_type == SILC_ROUTER)
2411 silc_server_announce_servers(server, FALSE, time(0) - 300,
2412 backup_router->connection);
2414 /* Announce our clients and channels to the router */
2415 silc_server_announce_clients(server, time(0) - 300,
2416 backup_router->connection);
2417 silc_server_announce_channels(server, time(0) - 300,
2418 backup_router->connection);
2424 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2426 silc_idlist_del_data(user_data);
2427 silc_free(user_data);
2432 /* If any protocol is active cancel its execution */
2433 if (sock->protocol) {
2434 silc_protocol_cancel(sock->protocol, server->schedule);
2435 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2436 silc_protocol_execute_final(sock->protocol, server->schedule);
2437 sock->protocol = NULL;
2440 sock->user_data = NULL;
2443 /* Removes client from all channels it has joined. This is used when client
2444 connection is disconnected. If the client on a channel is last, the
2445 channel is removed as well. This sends the SIGNOFF notify types. */
2447 void silc_server_remove_from_channels(SilcServer server,
2448 SilcSocketConnection sock,
2449 SilcClientEntry client,
2451 char *signoff_message,
2454 SilcChannelEntry channel;
2455 SilcChannelClientEntry chl;
2456 SilcHashTableList htl;
2459 SILC_LOG_DEBUG(("Start"));
2461 if (!client || !client->id)
2464 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2466 /* Remove the client from all channels. The client is removed from
2467 the channels' user list. */
2468 silc_hash_table_list(client->channels, &htl);
2469 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2470 channel = chl->channel;
2472 /* Remove channel from client's channel list */
2473 silc_hash_table_del(client->channels, channel);
2475 /* Remove channel if there is no users anymore */
2476 if (server->server_type == SILC_ROUTER &&
2477 silc_hash_table_count(channel->user_list) < 2) {
2479 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2480 if (silc_idlist_del_channel(server->local_list, channel))
2481 server->stat.my_channels--;
2483 silc_idlist_del_channel(server->global_list, channel);
2487 /* Remove client from channel's client list */
2488 silc_hash_table_del(channel->user_list, chl->client);
2490 /* If there is no global users on the channel anymore mark the channel
2491 as local channel. Do not check if the removed client is local client. */
2492 if (server->server_type != SILC_ROUTER && channel->global_users &&
2493 chl->client->router && !silc_server_channel_has_global(channel))
2494 channel->global_users = FALSE;
2497 server->stat.my_chanclients--;
2499 /* If there is not at least one local user on the channel then we don't
2500 need the channel entry anymore, we can remove it safely. */
2501 if (server->server_type != SILC_ROUTER &&
2502 !silc_server_channel_has_local(channel)) {
2503 /* Notify about leaving client if this channel has global users. */
2504 if (notify && channel->global_users)
2505 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2506 SILC_NOTIFY_TYPE_SIGNOFF,
2507 signoff_message ? 2 : 1,
2508 clidp->data, clidp->len,
2509 signoff_message, signoff_message ?
2510 strlen(signoff_message) : 0);
2513 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2515 if (channel->founder_key) {
2516 /* The founder auth data exists, do not remove the channel entry */
2517 SilcChannelClientEntry chl2;
2518 SilcHashTableList htl2;
2520 channel->disabled = TRUE;
2522 silc_hash_table_list(channel->user_list, &htl2);
2523 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2524 silc_hash_table_del(chl2->client->channels, channel);
2525 silc_hash_table_del(channel->user_list, chl2->client);
2531 /* Remove the channel entry */
2532 if (silc_idlist_del_channel(server->local_list, channel))
2533 server->stat.my_channels--;
2535 silc_idlist_del_channel(server->global_list, channel);
2539 /* Send notify to channel about client leaving SILC and thus
2540 the entire channel. */
2542 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2543 SILC_NOTIFY_TYPE_SIGNOFF,
2544 signoff_message ? 2 : 1,
2545 clidp->data, clidp->len,
2546 signoff_message, signoff_message ?
2547 strlen(signoff_message) : 0);
2549 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2550 /* Re-generate channel key */
2551 if (!silc_server_create_channel_key(server, channel, 0))
2554 /* Send the channel key to the channel. The key of course is not sent
2555 to the client who was removed from the channel. */
2556 silc_server_send_channel_key(server, client->connection, channel,
2557 server->server_type == SILC_ROUTER ?
2558 FALSE : !server->standalone);
2562 silc_buffer_free(clidp);
2565 /* Removes client from one channel. This is used for example when client
2566 calls LEAVE command to remove itself from the channel. Returns TRUE
2567 if channel still exists and FALSE if the channel is removed when
2568 last client leaves the channel. If `notify' is FALSE notify messages
2571 int silc_server_remove_from_one_channel(SilcServer server,
2572 SilcSocketConnection sock,
2573 SilcChannelEntry channel,
2574 SilcClientEntry client,
2577 SilcChannelClientEntry chl;
2580 SILC_LOG_DEBUG(("Start"));
2582 /* Get the entry to the channel, if this client is not on the channel
2584 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2587 /* Remove the client from the channel. The client is removed from
2588 the channel's user list. */
2590 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2592 /* Remove channel from client's channel list */
2593 silc_hash_table_del(client->channels, chl->channel);
2595 /* Remove channel if there is no users anymore */
2596 if (server->server_type == SILC_ROUTER &&
2597 silc_hash_table_count(channel->user_list) < 2) {
2599 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2600 if (silc_idlist_del_channel(server->local_list, channel))
2601 server->stat.my_channels--;
2603 silc_idlist_del_channel(server->global_list, channel);
2604 silc_buffer_free(clidp);
2608 /* Remove client from channel's client list */
2609 silc_hash_table_del(channel->user_list, chl->client);
2611 /* If there is no global users on the channel anymore mark the channel
2612 as local channel. Do not check if the client is local client. */
2613 if (server->server_type != SILC_ROUTER && channel->global_users &&
2614 chl->client->router && !silc_server_channel_has_global(channel))
2615 channel->global_users = FALSE;
2618 server->stat.my_chanclients--;
2620 /* If there is not at least one local user on the channel then we don't
2621 need the channel entry anymore, we can remove it safely. */
2622 if (server->server_type != SILC_ROUTER &&
2623 !silc_server_channel_has_local(channel)) {
2624 /* Notify about leaving client if this channel has global users. */
2625 if (notify && channel->global_users)
2626 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2627 SILC_NOTIFY_TYPE_LEAVE, 1,
2628 clidp->data, clidp->len);
2630 silc_buffer_free(clidp);
2633 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2635 if (channel->founder_key) {
2636 /* The founder auth data exists, do not remove the channel entry */
2637 SilcChannelClientEntry chl2;
2638 SilcHashTableList htl2;
2640 channel->disabled = TRUE;
2642 silc_hash_table_list(channel->user_list, &htl2);
2643 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2644 silc_hash_table_del(chl2->client->channels, channel);
2645 silc_hash_table_del(channel->user_list, chl2->client);
2651 /* Remove the channel entry */
2652 if (silc_idlist_del_channel(server->local_list, channel))
2653 server->stat.my_channels--;
2655 silc_idlist_del_channel(server->global_list, channel);
2659 /* Send notify to channel about client leaving the channel */
2661 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2662 SILC_NOTIFY_TYPE_LEAVE, 1,
2663 clidp->data, clidp->len);
2665 silc_buffer_free(clidp);
2669 /* Timeout callback. This is called if connection is idle or for some
2670 other reason is not responding within some period of time. This
2671 disconnects the remote end. */
2673 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2675 SilcServer server = (SilcServer)context;
2676 SilcSocketConnection sock = server->sockets[fd];
2678 SILC_LOG_DEBUG(("Start"));
2683 /* If we have protocol active we must assure that we call the protocol's
2684 final callback so that all the memory is freed. */
2685 if (sock->protocol) {
2686 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2687 silc_protocol_execute_final(sock->protocol, server->schedule);
2691 if (sock->user_data)
2692 silc_server_free_sock_user_data(server, sock);
2694 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2695 "Connection timeout");
2698 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2699 function may be used only by router. In real SILC network all channels
2700 are created by routers thus this function is never used by normal
2703 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2704 SilcServerID *router_id,
2710 SilcChannelID *channel_id;
2711 SilcChannelEntry entry;
2715 SILC_LOG_DEBUG(("Creating new channel"));
2718 cipher = SILC_DEFAULT_CIPHER;
2720 hmac = SILC_DEFAULT_HMAC;
2722 /* Allocate cipher */
2723 if (!silc_cipher_alloc(cipher, &key))
2727 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2728 silc_cipher_free(key);
2732 channel_name = strdup(channel_name);
2734 /* Create the channel */
2735 if (!silc_id_create_channel_id(server, router_id, server->rng,
2737 silc_free(channel_name);
2738 silc_cipher_free(key);
2739 silc_hmac_free(newhmac);
2742 entry = silc_idlist_add_channel(server->local_list, channel_name,
2743 SILC_CHANNEL_MODE_NONE, channel_id,
2744 NULL, key, newhmac);
2746 silc_free(channel_name);
2747 silc_cipher_free(key);
2748 silc_hmac_free(newhmac);
2752 entry->cipher = strdup(cipher);
2753 entry->hmac_name = strdup(hmac);
2755 /* Now create the actual key material */
2756 if (!silc_server_create_channel_key(server, entry,
2757 silc_cipher_get_key_len(key) / 8)) {
2758 silc_free(channel_name);
2759 silc_cipher_free(key);
2760 silc_hmac_free(newhmac);
2761 silc_free(entry->cipher);
2762 silc_free(entry->hmac_name);
2766 /* Notify other routers about the new channel. We send the packet
2767 to our primary route. */
2768 if (broadcast && server->standalone == FALSE)
2769 silc_server_send_new_channel(server, server->router->connection, TRUE,
2770 channel_name, entry->id,
2771 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2774 server->stat.my_channels++;
2779 /* Same as above but creates the channel with Channel ID `channel_id. */
2782 silc_server_create_new_channel_with_id(SilcServer server,
2786 SilcChannelID *channel_id,
2789 SilcChannelEntry entry;
2793 SILC_LOG_DEBUG(("Creating new channel"));
2796 cipher = SILC_DEFAULT_CIPHER;
2798 hmac = SILC_DEFAULT_HMAC;
2800 /* Allocate cipher */
2801 if (!silc_cipher_alloc(cipher, &key))
2805 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2806 silc_cipher_free(key);
2810 channel_name = strdup(channel_name);
2812 /* Create the channel */
2813 entry = silc_idlist_add_channel(server->local_list, channel_name,
2814 SILC_CHANNEL_MODE_NONE, channel_id,
2815 NULL, key, newhmac);
2817 silc_free(channel_name);
2821 /* Now create the actual key material */
2822 if (!silc_server_create_channel_key(server, entry,
2823 silc_cipher_get_key_len(key) / 8)) {
2824 silc_free(channel_name);
2828 /* Notify other routers about the new channel. We send the packet
2829 to our primary route. */
2830 if (broadcast && server->standalone == FALSE)
2831 silc_server_send_new_channel(server, server->router->connection, TRUE,
2832 channel_name, entry->id,
2833 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2836 server->stat.my_channels++;
2841 /* Channel's key re-key timeout callback. */
2843 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2845 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2846 SilcServer server = (SilcServer)rekey->context;
2850 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2853 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2856 /* Generates new channel key. This is used to create the initial channel key
2857 but also to re-generate new key for channel. If `key_len' is provided
2858 it is the bytes of the key length. */
2860 bool silc_server_create_channel_key(SilcServer server,
2861 SilcChannelEntry channel,
2865 unsigned char channel_key[32], hash[32];
2868 SILC_LOG_DEBUG(("Generating channel key"));
2870 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2871 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2875 if (!channel->channel_key)
2876 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
2881 else if (channel->key_len)
2882 len = channel->key_len / 8;
2884 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2886 /* Create channel key */
2887 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2890 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2892 /* Remove old key if exists */
2894 memset(channel->key, 0, channel->key_len / 8);
2895 silc_free(channel->key);
2899 channel->key_len = len * 8;
2900 channel->key = silc_calloc(len, sizeof(*channel->key));
2901 memcpy(channel->key, channel_key, len);
2902 memset(channel_key, 0, sizeof(channel_key));
2904 /* Generate HMAC key from the channel key data and set it */
2906 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2907 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2908 silc_hmac_set_key(channel->hmac, hash,
2909 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2910 memset(hash, 0, sizeof(hash));
2912 if (server->server_type == SILC_ROUTER) {
2913 if (!channel->rekey)
2914 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2915 channel->rekey->context = (void *)server;
2916 channel->rekey->channel = channel;
2917 channel->rekey->key_len = key_len;
2918 if (channel->rekey->task)
2919 silc_schedule_task_del(server->schedule, channel->rekey->task);
2921 channel->rekey->task =
2922 silc_schedule_task_add(server->schedule, 0,
2923 silc_server_channel_key_rekey,
2924 (void *)channel->rekey, 3600, 0,
2926 SILC_TASK_PRI_NORMAL);
2932 /* Saves the channel key found in the encoded `key_payload' buffer. This
2933 function is used when we receive Channel Key Payload and also when we're
2934 processing JOIN command reply. Returns entry to the channel. */
2936 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2937 SilcBuffer key_payload,
2938 SilcChannelEntry channel)
2940 SilcChannelKeyPayload payload = NULL;
2941 SilcChannelID *id = NULL;
2942 unsigned char *tmp, hash[32];
2946 SILC_LOG_DEBUG(("Start"));
2948 /* Decode channel key payload */
2949 payload = silc_channel_key_payload_parse(key_payload);
2951 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2956 /* Get the channel entry */
2959 /* Get channel ID */
2960 tmp = silc_channel_key_get_id(payload, &tmp_len);
2961 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2967 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2969 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2971 SILC_LOG_ERROR(("Received key for non-existent channel"));
2977 tmp = silc_channel_key_get_key(payload, &tmp_len);
2983 cipher = silc_channel_key_get_cipher(payload, NULL);
2989 /* Remove old key if exists */
2991 memset(channel->key, 0, channel->key_len / 8);
2992 silc_free(channel->key);
2993 silc_cipher_free(channel->channel_key);
2996 /* Create new cipher */
2997 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3002 if (channel->cipher)
3003 silc_free(channel->cipher);
3004 channel->cipher = strdup(cipher);
3007 channel->key_len = tmp_len * 8;
3008 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3009 memcpy(channel->key, tmp, tmp_len);
3010 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3012 /* Generate HMAC key from the channel key data and set it */
3014 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3015 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3016 silc_hmac_set_key(channel->hmac, hash,
3017 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3019 memset(hash, 0, sizeof(hash));
3020 memset(tmp, 0, tmp_len);
3022 if (server->server_type == SILC_ROUTER) {
3023 if (!channel->rekey)
3024 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3025 channel->rekey->context = (void *)server;
3026 channel->rekey->channel = channel;
3027 if (channel->rekey->task)
3028 silc_schedule_task_del(server->schedule, channel->rekey->task);
3030 channel->rekey->task =
3031 silc_schedule_task_add(server->schedule, 0,
3032 silc_server_channel_key_rekey,
3033 (void *)channel->rekey, 3600, 0,
3035 SILC_TASK_PRI_NORMAL);
3041 silc_channel_key_payload_free(payload);
3046 /* Heartbeat callback. This function is set as argument for the
3047 silc_socket_set_heartbeat function. The library will call this function
3048 at the set time interval. */
3050 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3053 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3055 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3058 /* Send the heartbeat */
3059 silc_server_send_heartbeat(hb->server, sock);
3062 /* Returns assembled of all servers in the given ID list. The packet's
3063 form is dictated by the New ID payload. */
3065 static void silc_server_announce_get_servers(SilcServer server,
3066 SilcServerEntry remote,
3068 SilcBuffer *servers,
3069 unsigned long creation_time)
3071 SilcIDCacheList list;
3072 SilcIDCacheEntry id_cache;
3073 SilcServerEntry entry;
3076 /* Go through all clients in the list */
3077 if (silc_idcache_get_all(id_list->servers, &list)) {
3078 if (silc_idcache_list_first(list, &id_cache)) {
3080 entry = (SilcServerEntry)id_cache->context;
3082 /* Do not announce the one we've sending our announcements and
3083 do not announce ourself. Also check the creation time if it's
3085 if ((entry == remote) || (entry == server->id_entry) ||
3086 (creation_time && entry->data.created < creation_time)) {
3087 if (!silc_idcache_list_next(list, &id_cache))
3092 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3094 *servers = silc_buffer_realloc(*servers,
3096 (*servers)->truelen + idp->len :
3098 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3099 silc_buffer_put(*servers, idp->data, idp->len);
3100 silc_buffer_pull(*servers, idp->len);
3101 silc_buffer_free(idp);
3103 if (!silc_idcache_list_next(list, &id_cache))
3108 silc_idcache_list_free(list);
3112 /* This function is used by router to announce existing servers to our
3113 primary router when we've connected to it. If `creation_time' is non-zero
3114 then only the servers that has been created after the `creation_time'
3115 will be announced. */
3117 void silc_server_announce_servers(SilcServer server, bool global,
3118 unsigned long creation_time,
3119 SilcSocketConnection remote)
3121 SilcBuffer servers = NULL;
3123 SILC_LOG_DEBUG(("Announcing servers"));
3125 /* Get servers in local list */
3126 silc_server_announce_get_servers(server, remote->user_data,
3127 server->local_list, &servers,
3131 /* Get servers in global list */
3132 silc_server_announce_get_servers(server, remote->user_data,
3133 server->global_list, &servers,
3137 silc_buffer_push(servers, servers->data - servers->head);
3138 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3140 /* Send the packet */
3141 silc_server_packet_send(server, remote,
3142 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3143 servers->data, servers->len, TRUE);
3145 silc_buffer_free(servers);
3149 /* Returns assembled packet of all clients in the given ID list. The
3150 packet's form is dictated by the New ID Payload. */
3152 static void silc_server_announce_get_clients(SilcServer server,
3154 SilcBuffer *clients,
3155 unsigned long creation_time)
3157 SilcIDCacheList list;
3158 SilcIDCacheEntry id_cache;
3159 SilcClientEntry client;
3162 /* Go through all clients in the list */
3163 if (silc_idcache_get_all(id_list->clients, &list)) {
3164 if (silc_idcache_list_first(list, &id_cache)) {
3166 client = (SilcClientEntry)id_cache->context;
3168 if (creation_time && client->data.created < creation_time) {
3169 if (!silc_idcache_list_next(list, &id_cache))
3174 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3176 *clients = silc_buffer_realloc(*clients,
3178 (*clients)->truelen + idp->len :
3180 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3181 silc_buffer_put(*clients, idp->data, idp->len);
3182 silc_buffer_pull(*clients, idp->len);
3183 silc_buffer_free(idp);
3185 if (!silc_idcache_list_next(list, &id_cache))
3190 silc_idcache_list_free(list);
3194 /* This function is used to announce our existing clients to our router
3195 when we've connected to it. If `creation_time' is non-zero then only
3196 the clients that has been created after the `creation_time' will be
3199 void silc_server_announce_clients(SilcServer server,
3200 unsigned long creation_time,
3201 SilcSocketConnection remote)
3203 SilcBuffer clients = NULL;
3205 SILC_LOG_DEBUG(("Announcing clients"));
3207 /* Get clients in local list */
3208 silc_server_announce_get_clients(server, server->local_list,
3209 &clients, creation_time);
3211 /* As router we announce our global list as well */
3212 if (server->server_type == SILC_ROUTER)
3213 silc_server_announce_get_clients(server, server->global_list,
3214 &clients, creation_time);
3217 silc_buffer_push(clients, clients->data - clients->head);
3218 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3220 /* Send the packet */
3221 silc_server_packet_send(server, remote,
3222 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3223 clients->data, clients->len, TRUE);
3225 silc_buffer_free(clients);
3230 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3236 p = silc_notify_payload_encode(notify, argc, ap);
3242 /* Returns assembled packets for channel users of the `channel'. */
3244 void silc_server_announce_get_channel_users(SilcServer server,
3245 SilcChannelEntry channel,
3246 SilcBuffer *channel_users,
3247 SilcBuffer *channel_users_modes)
3249 SilcChannelClientEntry chl;
3250 SilcHashTableList htl;
3251 SilcBuffer chidp, clidp;
3254 unsigned char mode[4];
3256 SILC_LOG_DEBUG(("Start"));
3258 /* Now find all users on the channel */
3259 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3260 silc_hash_table_list(channel->user_list, &htl);
3261 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3262 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3265 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3266 clidp->data, clidp->len,
3267 chidp->data, chidp->len);
3270 silc_buffer_realloc(*channel_users,
3272 (*channel_users)->truelen + len : len));
3273 silc_buffer_pull_tail(*channel_users,
3274 ((*channel_users)->end -
3275 (*channel_users)->data));
3277 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3278 silc_buffer_pull(*channel_users, len);
3279 silc_buffer_free(tmp);
3281 /* CUMODE notify for mode change on the channel */
3282 SILC_PUT32_MSB(chl->mode, mode);
3283 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3284 3, clidp->data, clidp->len,
3286 clidp->data, clidp->len);
3288 *channel_users_modes =
3289 silc_buffer_realloc(*channel_users_modes,
3290 (*channel_users_modes ?
3291 (*channel_users_modes)->truelen + len : len));
3292 silc_buffer_pull_tail(*channel_users_modes,
3293 ((*channel_users_modes)->end -
3294 (*channel_users_modes)->data));
3296 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3297 silc_buffer_pull(*channel_users_modes, len);
3298 silc_buffer_free(tmp);
3300 silc_buffer_free(clidp);
3302 silc_buffer_free(chidp);
3305 /* Returns assembled packets for all channels and users on those channels
3306 from the given ID List. The packets are in the form dictated by the
3307 New Channel and New Channel User payloads. */
3309 void silc_server_announce_get_channels(SilcServer server,
3311 SilcBuffer *channels,
3312 SilcBuffer *channel_users,
3313 SilcBuffer **channel_users_modes,
3314 uint32 *channel_users_modes_c,
3315 SilcChannelID ***channel_ids,
3316 unsigned long creation_time)
3318 SilcIDCacheList list;
3319 SilcIDCacheEntry id_cache;
3320 SilcChannelEntry channel;
3325 int i = *channel_users_modes_c;
3328 SILC_LOG_DEBUG(("Start"));
3330 /* Go through all channels in the list */
3331 if (silc_idcache_get_all(id_list->channels, &list)) {
3332 if (silc_idcache_list_first(list, &id_cache)) {
3334 channel = (SilcChannelEntry)id_cache->context;
3336 if (creation_time && channel->created < creation_time)
3341 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3342 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3343 name_len = strlen(channel->channel_name);
3346 len = 4 + name_len + id_len + 4;
3348 silc_buffer_realloc(*channels,
3349 (*channels ? (*channels)->truelen +
3351 silc_buffer_pull_tail(*channels,
3352 ((*channels)->end - (*channels)->data));
3353 silc_buffer_format(*channels,
3354 SILC_STR_UI_SHORT(name_len),
3355 SILC_STR_UI_XNSTRING(channel->channel_name,
3357 SILC_STR_UI_SHORT(id_len),
3358 SILC_STR_UI_XNSTRING(cid, id_len),
3359 SILC_STR_UI_INT(channel->mode),
3361 silc_buffer_pull(*channels, len);
3364 *channel_users_modes = silc_realloc(*channel_users_modes,
3365 sizeof(**channel_users_modes) *
3367 (*channel_users_modes)[i] = NULL;
3368 *channel_ids = silc_realloc(*channel_ids,
3369 sizeof(**channel_ids) * (i + 1));
3370 (*channel_ids)[i] = NULL;
3371 silc_server_announce_get_channel_users(server, channel,
3373 channel_users_modes[i]);
3374 (*channel_ids)[i] = channel->id;
3377 if (!silc_idcache_list_next(list, &id_cache))
3381 *channel_users_modes_c += i;
3384 silc_idcache_list_free(list);
3388 /* This function is used to announce our existing channels to our router
3389 when we've connected to it. This also announces the users on the
3390 channels to the router. If the `creation_time' is non-zero only the
3391 channels that was created after the `creation_time' are announced.
3392 Note that the channel users are still announced even if the `creation_time'
3395 void silc_server_announce_channels(SilcServer server,
3396 unsigned long creation_time,
3397 SilcSocketConnection remote)
3399 SilcBuffer channels = NULL, channel_users = NULL;
3400 SilcBuffer *channel_users_modes = NULL;
3401 uint32 channel_users_modes_c = 0;
3402 SilcChannelID **channel_ids = NULL;
3404 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3406 /* Get channels and channel users in local list */
3407 silc_server_announce_get_channels(server, server->local_list,
3408 &channels, &channel_users,
3409 &channel_users_modes,
3410 &channel_users_modes_c,
3411 &channel_ids, creation_time);
3413 /* Get channels and channel users in global list */
3414 silc_server_announce_get_channels(server, server->global_list,
3415 &channels, &channel_users,
3416 &channel_users_modes,
3417 &channel_users_modes_c,
3418 &channel_ids, creation_time);
3421 silc_buffer_push(channels, channels->data - channels->head);
3422 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3424 /* Send the packet */
3425 silc_server_packet_send(server, remote,
3426 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3427 channels->data, channels->len,
3430 silc_buffer_free(channels);
3433 if (channel_users) {
3434 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3435 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3436 channel_users->len);
3438 /* Send the packet */
3439 silc_server_packet_send(server, remote,
3440 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3441 channel_users->data, channel_users->len,
3444 silc_buffer_free(channel_users);
3447 if (channel_users_modes) {
3450 for (i = 0; i < channel_users_modes_c; i++) {
3451 silc_buffer_push(channel_users_modes[i],
3452 channel_users_modes[i]->data -
3453 channel_users_modes[i]->head);
3454 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3455 channel_users_modes[i]->len);
3456 silc_server_packet_send_dest(server, remote,
3457 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3458 channel_ids[i], SILC_ID_CHANNEL,
3459 channel_users_modes[i]->data,
3460 channel_users_modes[i]->len,
3462 silc_buffer_free(channel_users_modes[i]);
3464 silc_free(channel_users_modes);
3465 silc_free(channel_ids);
3469 /* Failure timeout callback. If this is called then we will immediately
3470 process the received failure. We always process the failure with timeout
3471 since we do not want to blindly trust to received failure packets.
3472 This won't be called (the timeout is cancelled) if the failure was
3473 bogus (it is bogus if remote does not close the connection after sending
3476 SILC_TASK_CALLBACK(silc_server_failure_callback)
3478 SilcServerFailureContext f = (SilcServerFailureContext)context;
3480 if (f->sock->protocol) {
3481 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3482 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3488 /* Assembles user list and users mode list from the `channel'. */
3490 void silc_server_get_users_on_channel(SilcServer server,
3491 SilcChannelEntry channel,
3492 SilcBuffer *user_list,
3493 SilcBuffer *mode_list,
3496 SilcChannelClientEntry chl;
3497 SilcHashTableList htl;
3498 SilcBuffer client_id_list;
3499 SilcBuffer client_mode_list;
3501 uint32 list_count = 0, len = 0;
3503 silc_hash_table_list(channel->user_list, &htl);
3504 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3505 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3507 client_id_list = silc_buffer_alloc(len);
3509 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3510 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3511 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3513 silc_hash_table_list(channel->user_list, &htl);
3514 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3516 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3517 silc_buffer_put(client_id_list, idp->data, idp->len);
3518 silc_buffer_pull(client_id_list, idp->len);
3519 silc_buffer_free(idp);
3521 /* Client's mode on channel */
3522 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3523 silc_buffer_pull(client_mode_list, 4);
3527 silc_buffer_push(client_id_list,
3528 client_id_list->data - client_id_list->head);
3529 silc_buffer_push(client_mode_list,
3530 client_mode_list->data - client_mode_list->head);
3532 *user_list = client_id_list;
3533 *mode_list = client_mode_list;
3534 *user_count = list_count;
3537 /* Saves users and their modes to the `channel'. */
3539 void silc_server_save_users_on_channel(SilcServer server,
3540 SilcSocketConnection sock,
3541 SilcChannelEntry channel,
3542 SilcClientID *noadd,
3543 SilcBuffer user_list,
3544 SilcBuffer mode_list,
3549 for (i = 0; i < user_count; i++) {
3552 SilcClientID *client_id;
3553 SilcClientEntry client;
3556 SILC_GET16_MSB(idp_len, user_list->data + 2);
3558 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3559 silc_buffer_pull(user_list, idp_len);
3564 SILC_GET32_MSB(mode, mode_list->data);
3565 silc_buffer_pull(mode_list, 4);
3567 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3568 silc_free(client_id);
3572 /* Check if we have this client cached already. */
3573 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3574 server->server_type, NULL);
3576 client = silc_idlist_find_client_by_id(server->global_list,
3577 client_id, server->server_type,
3580 /* If router did not find such Client ID in its lists then this must
3581 be bogus client or some router in the net is buggy. */
3582 if (server->server_type == SILC_ROUTER) {
3583 silc_free(client_id);
3587 /* We don't have that client anywhere, add it. The client is added
3588 to global list since server didn't have it in the lists so it must be
3590 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3591 silc_id_dup(client_id, SILC_ID_CLIENT),
3592 sock->user_data, NULL);
3594 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3595 silc_free(client_id);
3599 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3602 silc_free(client_id);
3604 if (!silc_server_client_on_channel(client, channel)) {
3605 /* Client was not on the channel, add it. */
3606 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3607 chl->client = client;
3609 chl->channel = channel;
3610 silc_hash_table_add(channel->user_list, chl->client, chl);
3611 silc_hash_table_add(client->channels, chl->channel, chl);
3616 /* Lookups route to the client indicated by the `id_data'. The connection
3617 object and internal data object is returned. Returns NULL if route
3618 could not be found to the client. If the `client_id' is specified then
3619 it is used and the `id_data' is ignored. */
3621 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3622 unsigned char *id_data,
3624 SilcClientID *client_id,
3625 SilcIDListData *idata)
3628 SilcClientEntry client;
3630 SILC_LOG_DEBUG(("Start"));
3632 /* Decode destination Client ID */
3634 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3636 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3640 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3643 /* If the destination belongs to our server we don't have to route
3644 the packet anywhere but to send it to the local destination. */
3645 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3649 /* If we are router and the client has router then the client is in
3650 our cell but not directly connected to us. */
3651 if (server->server_type == SILC_ROUTER && client->router) {
3652 /* We are of course in this case the client's router thus the route
3653 to the client is the server who owns the client. So, we will send
3654 the packet to that server. */
3656 *idata = (SilcIDListData)client->router;
3657 return client->router->connection;
3660 /* Seems that client really is directly connected to us */
3662 *idata = (SilcIDListData)client;
3663 return client->connection;
3666 /* Destination belongs to someone not in this server. If we are normal
3667 server our action is to send the packet to our router. */
3668 if (server->server_type != SILC_ROUTER && !server->standalone) {
3671 *idata = (SilcIDListData)server->router;
3672 return server->router->connection;
3675 /* We are router and we will perform route lookup for the destination
3676 and send the packet to fastest route. */
3677 if (server->server_type == SILC_ROUTER && !server->standalone) {
3678 /* Check first that the ID is valid */
3679 client = silc_idlist_find_client_by_id(server->global_list, id,
3682 SilcSocketConnection dst_sock;
3684 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3688 *idata = (SilcIDListData)dst_sock->user_data;
3697 /* Encodes and returns channel list of channels the `client' has joined.
3698 Secret channels are not put to the list. */
3700 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3701 SilcClientEntry client)
3703 SilcBuffer buffer = NULL;
3704 SilcChannelEntry channel;
3705 SilcChannelClientEntry chl;
3706 SilcHashTableList htl;
3712 silc_hash_table_list(client->channels, &htl);
3713 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3714 channel = chl->channel;
3716 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3717 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3720 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3721 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3722 name_len = strlen(channel->channel_name);
3724 len = 4 + name_len + id_len + 4;
3725 buffer = silc_buffer_realloc(buffer,
3726 (buffer ? (buffer)->truelen + len : len));
3727 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3728 silc_buffer_format(buffer,
3729 SILC_STR_UI_SHORT(name_len),
3730 SILC_STR_UI_XNSTRING(channel->channel_name,
3732 SILC_STR_UI_SHORT(id_len),
3733 SILC_STR_UI_XNSTRING(cid, id_len),
3734 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3736 silc_buffer_pull(buffer, len);
3741 silc_buffer_push(buffer, buffer->data - buffer->head);
3746 /* Finds client entry by Client ID and if it is not found then resolves
3747 it using WHOIS command. */
3749 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3750 SilcClientID *client_id)
3752 SilcClientEntry client;
3754 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3757 client = silc_idlist_find_client_by_id(server->global_list,
3758 client_id, TRUE, NULL);
3759 if (!client && server->server_type == SILC_ROUTER)
3763 if (!client && server->standalone)
3766 if (!client || !client->nickname || !client->username) {
3767 SilcBuffer buffer, idp;
3769 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3770 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3771 client->resolve_cmd_ident = ++server->cmd_ident;
3773 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3774 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3775 server->cmd_ident, 1,
3776 3, idp->data, idp->len);
3777 silc_server_packet_send(server, client ? client->router->connection :
3778 server->router->connection,
3779 SILC_PACKET_COMMAND, 0,
3780 buffer->data, buffer->len, FALSE);
3781 silc_buffer_free(idp);
3782 silc_buffer_free(buffer);
3789 /* A timeout callback for the re-key. We will be the initiator of the
3792 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3794 SilcSocketConnection sock = (SilcSocketConnection)context;
3795 SilcIDListData idata = (SilcIDListData)sock->user_data;
3796 SilcServer server = (SilcServer)idata->rekey->context;
3797 SilcProtocol protocol;
3798 SilcServerRekeyInternalContext *proto_ctx;
3800 SILC_LOG_DEBUG(("Start"));
3802 /* Allocate internal protocol context. This is sent as context
3804 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3805 proto_ctx->server = (void *)server;
3806 proto_ctx->sock = sock;
3807 proto_ctx->responder = FALSE;
3808 proto_ctx->pfs = idata->rekey->pfs;
3810 /* Perform rekey protocol. Will call the final callback after the
3811 protocol is over. */
3812 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3813 &protocol, proto_ctx, silc_server_rekey_final);
3814 sock->protocol = protocol;
3816 /* Run the protocol */
3817 silc_protocol_execute(protocol, server->schedule, 0, 0);
3819 /* Re-register re-key timeout */
3820 silc_schedule_task_add(server->schedule, sock->sock,
3821 silc_server_rekey_callback,
3822 context, idata->rekey->timeout, 0,
3823 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3826 /* The final callback for the REKEY protocol. This will actually take the
3827 new key material into use. */
3829 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3831 SilcProtocol protocol = (SilcProtocol)context;
3832 SilcServerRekeyInternalContext *ctx =
3833 (SilcServerRekeyInternalContext *)protocol->context;
3834 SilcServer server = (SilcServer)ctx->server;
3835 SilcSocketConnection sock = ctx->sock;
3837 SILC_LOG_DEBUG(("Start"));
3839 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3840 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3841 /* Error occured during protocol */
3842 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3843 silc_protocol_cancel(protocol, server->schedule);
3844 silc_protocol_free(protocol);
3845 sock->protocol = NULL;
3847 silc_packet_context_free(ctx->packet);
3849 silc_ske_free(ctx->ske);
3854 /* Purge the outgoing data queue to assure that all rekey packets really
3855 go to the network before we quit the protocol. */
3856 silc_server_packet_queue_purge(server, sock);
3859 silc_protocol_free(protocol);
3860 sock->protocol = NULL;
3862 silc_packet_context_free(ctx->packet);
3864 silc_ske_free(ctx->ske);