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, 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);
186 SILC_LOG_ERROR(("Could not create server listener: %s on %d",
187 server->config->listen_port->listener_ip,
188 server->config->listen_port->port));
192 sock = silc_realloc(sock, sizeof(*sock) * (sock_count + 1));
193 sock[sock_count] = tmp;
195 listen = listen->next;
198 /* Initialize ID caches */
199 server->local_list->clients =
200 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
201 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
202 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
204 /* These are allocated for normal server as well as these hold some
205 global information that the server has fetched from its router. For
206 router these are used as they are supposed to be used on router. */
207 server->global_list->clients =
208 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
209 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
210 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
212 /* Allocate the entire socket list that is used in server. Eventually
213 all connections will have entry in this table (it is a table of
214 pointers to the actual object that is allocated individually
216 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
217 sizeof(*server->sockets));
219 for (i = 0; i < sock_count; i++) {
220 SilcSocketConnection newsocket = NULL;
222 /* Set socket to non-blocking mode */
223 silc_net_set_socket_nonblock(sock[i]);
224 server->sock = sock[i];
226 /* Add ourselves also to the socket table. The entry allocated above
227 is sent as argument for fast referencing in the future. */
228 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
229 server->sockets[sock[i]] = newsocket;
231 /* Perform name and address lookups to resolve the listenning address
233 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
235 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
237 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
238 newsocket->hostname ? newsocket->hostname :
239 newsocket->ip ? newsocket->ip : ""));
240 server->stat.conn_failures++;
243 if (!newsocket->hostname)
244 newsocket->hostname = strdup(newsocket->ip);
246 newsocket->port = silc_net_get_local_port(sock[i]);
248 /* Create a Server ID for the server. */
249 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
254 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
255 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
256 server->id_type = SILC_ID_SERVER;
257 server->server_name = server->config->server_info->server_name;
259 /* Add ourselves to the server list. We don't have a router yet
260 beacuse we haven't established a route yet. It will be done later.
261 For now, NULL is sent as router. This allocates new entry to
264 silc_idlist_add_server(server->local_list,
265 server->config->server_info->server_name,
266 server->server_type, server->id, NULL, NULL);
268 SILC_LOG_ERROR(("Could not add ourselves to cache"));
271 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
273 /* Put the allocated socket pointer also to the entry allocated above
274 for fast back-referencing to the socket list. */
275 newsocket->user_data = (void *)id_entry;
276 id_entry->connection = (void *)newsocket;
277 server->id_entry = id_entry;
280 /* Register protocols */
281 silc_server_protocols_register();
283 /* Initialize the scheduler. */
284 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
285 if (!server->schedule)
288 /* Add the first task to the scheduler. This is task that is executed by
289 timeout. It expires as soon as the caller calls silc_server_run. This
290 task performs authentication protocol and key exchange with our
292 silc_schedule_task_add(server->schedule, sock[0],
293 silc_server_connect_to_router,
294 (void *)server, 0, 1,
296 SILC_TASK_PRI_NORMAL);
298 /* Add listener task to the scheduler. This task receives new connections
299 to the server. This task remains on the queue until the end of the
301 silc_schedule_task_add(server->schedule, sock[0],
302 silc_server_accept_new_connection,
303 (void *)server, 0, 0,
305 SILC_TASK_PRI_NORMAL);
306 server->listenning = TRUE;
308 /* If server connections has been configured then we must be router as
309 normal server cannot have server connections, only router connections. */
310 if (server->config->servers) {
311 SilcServerConfigSectionServerConnection *ptr = server->config->servers;
313 server->server_type = SILC_ROUTER;
315 if (ptr->backup_router) {
316 server->server_type = SILC_BACKUP_ROUTER;
317 server->backup_router = TRUE;
318 server->id_entry->server_type = SILC_BACKUP_ROUTER;
325 /* Register the ID Cache purge task. This periodically purges the ID cache
326 and removes the expired cache entries. */
328 /* Clients local list */
329 purge = silc_calloc(1, sizeof(*purge));
330 purge->cache = server->local_list->clients;
331 purge->schedule = server->schedule;
332 purge->timeout = 600;
333 silc_schedule_task_add(purge->schedule, 0,
335 (void *)purge, purge->timeout, 0,
336 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
338 /* Clients global list */
339 purge = silc_calloc(1, sizeof(*purge));
340 purge->cache = server->global_list->clients;
341 purge->schedule = server->schedule;
342 purge->timeout = 300;
343 silc_schedule_task_add(purge->schedule, 0,
345 (void *)purge, purge->timeout, 0,
346 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
348 SILC_LOG_DEBUG(("Server initialized"));
350 /* We are done here, return succesfully */
354 for (i = 0; i < sock_count; i++)
355 silc_net_close_server(sock[i]);
360 /* Fork server to background and set gid+uid to non-root */
362 void silc_server_daemonise(SilcServer server)
371 SILC_LOG_DEBUG(("Server started as user"));
373 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
375 SILC_LOG_DEBUG(("Forking SILC server to background"));
378 SILC_LOG_DEBUG(("fork() failed, cannot proceed"));
385 /* Drop root privligies. If this cannot be done, die. */
387 void silc_server_drop(SilcServer server)
389 /* Are we executing silcd as root or a regular user? */
396 if (!server->config->identity || !server->config->identity->user ||
397 !server->config->identity->group) {
398 fprintf(stderr, "Error:"
399 "\tSILC server must not be run as root. For the security of your\n"
400 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
401 "\tuser account. Modify the [Identity] configuration section to run\n"
402 "\tthe server as non-root user.\n");
406 /* Get the values given for user and group in configuration file */
407 user=server->config->identity->user;
408 group=server->config->identity->group;
410 /* Check whether the user/group information is text */
411 if (atoi(user)!=0 || atoi(group)!=0) {
412 SILC_LOG_DEBUG(("Invalid user and/or group information"));
413 SILC_LOG_DEBUG(("User and/or group given as number"));
414 fprintf(stderr, "Invalid user and/or group information\n");
415 fprintf(stderr, "Please assign them as names, not numbers\n");
419 /* Catch the nasty incident of string "0" returning 0 from atoi */
420 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
421 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
422 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
426 if (!(pw=getpwnam(user))) {
427 fprintf(stderr, "No such user %s found\n", user);
431 if (!(gr=getgrnam(group))) {
432 fprintf(stderr, "No such group %s found\n", group);
436 /* Check whether user and/or group is set to root. If yes, exit
437 immediately. Otherwise, setgid and setuid server to user.group */
438 if (gr->gr_gid==0 || pw->pw_uid==0) {
439 fprintf(stderr, "Error:"
440 "\tSILC server must not be run as root. For the security of your\n"
441 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
442 "\tuser account. Modify the [Identity] configuration section to run\n"
443 "\tthe server as non-root user.\n");
446 SILC_LOG_DEBUG(("Changing to group %s", group));
447 if (setgid(gr->gr_gid)==0) {
448 SILC_LOG_DEBUG(("Setgid to %s", group));
450 SILC_LOG_DEBUG(("Setgid to %s failed", group));
451 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
455 #if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
456 if (setgroups(0, NULL)!=0) {
457 SILC_LOG_DEBUG(("Setgroups to NULL failed"));
458 fprintf(stderr, "Tried to setgroups NULL but failed. Exiting\n");
461 if (initgroups(user, gr->gr_gid)!=0) {
462 SILC_LOG_DEBUG(("Initgroups to user %s (gid=%d) failed", user, gr->gr_gid));
463 fprintf(stderr, "Tried to initgroups %s (gid=%d) but no such user. Exiting\n",
468 SILC_LOG_DEBUG(("Changing to user %s", user));
469 if (setuid(pw->pw_uid)==0) {
470 SILC_LOG_DEBUG(("Setuid to %s", user));
472 SILC_LOG_DEBUG(("Setuid to %s failed", user));
473 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
481 /* The heart of the server. This runs the scheduler thus runs the server.
482 When this returns the server has been stopped and the program will
485 void silc_server_run(SilcServer server)
487 SILC_LOG_DEBUG(("Running server"));
489 SILC_LOG_INFO(("SILC Server started"));
491 /* Start the scheduler, the heart of the SILC server. When this returns
492 the program will be terminated. */
493 silc_schedule(server->schedule);
496 /* Stops the SILC server. This function is used to shutdown the server.
497 This is usually called after the scheduler has returned. After stopping
498 the server one should call silc_server_free. */
500 void silc_server_stop(SilcServer server)
502 SILC_LOG_DEBUG(("Stopping server"));
504 silc_schedule_stop(server->schedule);
505 silc_schedule_uninit(server->schedule);
507 silc_server_protocols_unregister();
509 SILC_LOG_DEBUG(("Server stopped"));
512 /* Function that is called when the network connection to a router has
513 been established. This will continue with the key exchange protocol
514 with the remote router. */
516 void silc_server_start_key_exchange(SilcServer server,
517 SilcServerConnection sconn,
520 SilcSocketConnection newsocket;
521 SilcProtocol protocol;
522 SilcServerKEInternalContext *proto_ctx;
525 /* Set socket options */
526 silc_net_set_socket_nonblock(sock);
527 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
529 /* Create socket connection for the connection. Even though we
530 know that we are connecting to a router we will mark the socket
531 to be unknown connection until we have executed authentication
533 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
534 server->sockets[sock] = newsocket;
535 newsocket->hostname = strdup(sconn->remote_host);
536 newsocket->ip = strdup(sconn->remote_host);
537 newsocket->port = sconn->remote_port;
538 sconn->sock = newsocket;
540 /* Allocate internal protocol context. This is sent as context
542 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
543 proto_ctx->server = (void *)server;
544 proto_ctx->context = (void *)sconn;
545 proto_ctx->sock = newsocket;
546 proto_ctx->rng = server->rng;
547 proto_ctx->responder = FALSE;
549 /* Perform key exchange protocol. silc_server_connect_to_router_second
550 will be called after the protocol is finished. */
551 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
552 &protocol, proto_ctx,
553 silc_server_connect_to_router_second);
554 newsocket->protocol = protocol;
556 /* Register a timeout task that will be executed if the protocol
557 is not executed within set limit. */
558 proto_ctx->timeout_task =
559 silc_schedule_task_add(server->schedule, sock,
560 silc_server_timeout_remote,
561 server, server->params->protocol_timeout,
562 server->params->protocol_timeout_usec,
566 /* Register the connection for network input and output. This sets
567 that scheduler will listen for incoming packets for this connection
568 and sets that outgoing packets may be sent to this connection as
569 well. However, this doesn't set the scheduler for outgoing traffic,
570 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
571 later when outgoing data is available. */
572 context = (void *)server;
573 SILC_REGISTER_CONNECTION_FOR_IO(sock);
575 /* Run the protocol */
576 silc_protocol_execute(protocol, server->schedule, 0, 0);
579 /* Timeout callback that will be called to retry connecting to remote
580 router. This is used by both normal and router server. This will wait
581 before retrying the connecting. The timeout is generated by exponential
582 backoff algorithm. */
584 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
586 SilcServerConnection sconn = (SilcServerConnection)context;
587 SilcServer server = sconn->server;
589 SILC_LOG_INFO(("Retrying connecting to a router"));
591 /* Calculate next timeout */
592 if (sconn->retry_count >= 1) {
593 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
594 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
595 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
597 sconn->retry_timeout = server->params->retry_interval_min;
599 sconn->retry_count++;
600 sconn->retry_timeout = sconn->retry_timeout +
601 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
603 /* If we've reached max retry count, give up. */
604 if (sconn->retry_count > server->params->retry_count &&
605 server->params->retry_keep_trying == FALSE) {
606 SILC_LOG_ERROR(("Could not connect to router, giving up"));
607 silc_free(sconn->remote_host);
612 /* Wait one before retrying */
613 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
614 context, sconn->retry_timeout,
615 server->params->retry_interval_min_usec,
616 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
619 /* Generic routine to use connect to a router. */
621 SILC_TASK_CALLBACK(silc_server_connect_router)
623 SilcServerConnection sconn = (SilcServerConnection)context;
624 SilcServer server = sconn->server;
627 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
628 (sconn->backup ? "backup router" : "router"),
629 sconn->remote_host, sconn->remote_port));
631 server->router_connect = time(0);
633 /* Connect to remote host */
634 sock = silc_net_create_connection(server->config->listen_port->local_ip,
638 SILC_LOG_ERROR(("Could not connect to router"));
639 silc_schedule_task_add(server->schedule, fd,
640 silc_server_connect_to_router_retry,
641 context, 0, 1, SILC_TASK_TIMEOUT,
642 SILC_TASK_PRI_NORMAL);
646 /* Continue with key exchange protocol */
647 silc_server_start_key_exchange(server, sconn, sock);
650 /* This function connects to our primary router or if we are a router this
651 establishes all our primary routes. This is called at the start of the
652 server to do authentication and key exchange with our router - called
655 SILC_TASK_CALLBACK(silc_server_connect_to_router)
657 SilcServer server = (SilcServer)context;
658 SilcServerConnection sconn;
659 SilcServerConfigSectionServerConnection *ptr;
661 SILC_LOG_DEBUG(("Connecting to router(s)"));
663 if (server->server_type == SILC_SERVER) {
664 SILC_LOG_DEBUG(("We are normal server"));
665 } else if (server->server_type == SILC_ROUTER) {
666 SILC_LOG_DEBUG(("We are router"));
668 SILC_LOG_DEBUG(("We are backup router/normal server"));
671 /* Create the connections to all our routes */
672 ptr = server->config->routers;
675 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
676 ptr->backup_router ? "Backup router" : "Router",
677 ptr->initiator ? "Initiator" : "Responder",
678 ptr->host, ptr->port));
680 if (ptr->initiator) {
681 /* Allocate connection object for hold connection specific stuff. */
682 sconn = silc_calloc(1, sizeof(*sconn));
683 sconn->server = server;
684 sconn->remote_host = strdup(ptr->host);
685 sconn->remote_port = ptr->port;
686 sconn->backup = ptr->backup_router;
688 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
689 sconn->backup_replace_port = ptr->backup_replace_port;
692 silc_schedule_task_add(server->schedule, fd,
693 silc_server_connect_router,
694 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
695 SILC_TASK_PRI_NORMAL);
704 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
706 /* There wasn't a configured router, we will continue but we don't
707 have a connection to outside world. We will be standalone server. */
708 server->standalone = TRUE;
711 /* Second part of connecting to router(s). Key exchange protocol has been
712 executed and now we will execute authentication protocol. */
714 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
716 SilcProtocol protocol = (SilcProtocol)context;
717 SilcServerKEInternalContext *ctx =
718 (SilcServerKEInternalContext *)protocol->context;
719 SilcServer server = (SilcServer)ctx->server;
720 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
721 SilcSocketConnection sock = ctx->sock;
722 SilcServerConnAuthInternalContext *proto_ctx;
723 SilcServerConfigSectionServerConnection *conn = NULL;
725 SILC_LOG_DEBUG(("Start"));
727 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
728 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
729 /* Error occured during protocol */
730 silc_protocol_free(protocol);
731 sock->protocol = NULL;
732 silc_ske_free_key_material(ctx->keymat);
734 silc_packet_context_free(ctx->packet);
736 silc_ske_free(ctx->ske);
737 silc_free(ctx->dest_id);
739 silc_schedule_task_del_by_callback(server->schedule,
740 silc_server_failure_callback);
741 silc_server_disconnect_remote(server, sock, "Server closed connection: "
742 "Key exchange failed");
746 /* We now have the key material as the result of the key exchange
747 protocol. Take the key material into use. Free the raw key material
748 as soon as we've set them into use. */
749 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
750 ctx->sock, ctx->keymat,
751 ctx->ske->prop->cipher,
752 ctx->ske->prop->pkcs,
753 ctx->ske->prop->hash,
754 ctx->ske->prop->hmac,
755 ctx->ske->prop->group,
757 silc_protocol_free(protocol);
758 sock->protocol = NULL;
759 silc_ske_free_key_material(ctx->keymat);
761 silc_packet_context_free(ctx->packet);
763 silc_ske_free(ctx->ske);
764 silc_free(ctx->dest_id);
766 silc_schedule_task_del_by_callback(server->schedule,
767 silc_server_failure_callback);
768 silc_server_disconnect_remote(server, sock, "Server closed connection: "
769 "Key exchange failed");
772 silc_ske_free_key_material(ctx->keymat);
774 /* Allocate internal context for the authentication protocol. This
775 is sent as context for the protocol. */
776 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
777 proto_ctx->server = (void *)server;
778 proto_ctx->context = (void *)sconn;
779 proto_ctx->sock = sock;
780 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
781 proto_ctx->dest_id_type = ctx->dest_id_type;
782 proto_ctx->dest_id = ctx->dest_id;
784 /* Resolve the authentication method used in this connection. Check if
785 we find a match from user configured connections */
786 conn = silc_server_config_find_router_conn(server->config,
790 /* Match found. Use the configured authentication method */
791 proto_ctx->auth_meth = conn->auth_meth;
792 if (conn->auth_data) {
793 proto_ctx->auth_data = strdup(conn->auth_data);
794 proto_ctx->auth_data_len = strlen(conn->auth_data);
797 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
798 sock->hostname, sock->ip, sock->port));
799 silc_protocol_free(protocol);
800 sock->protocol = NULL;
802 silc_packet_context_free(ctx->packet);
804 silc_ske_free(ctx->ske);
805 silc_free(ctx->dest_id);
807 silc_schedule_task_del_by_callback(server->schedule,
808 silc_server_failure_callback);
809 silc_server_disconnect_remote(server, sock, "Server closed connection: "
810 "Key exchange failed");
814 /* Free old protocol as it is finished now */
815 silc_protocol_free(protocol);
817 silc_packet_context_free(ctx->packet);
819 sock->protocol = NULL;
821 /* Allocate the authentication protocol. This is allocated here
822 but we won't start it yet. We will be receiving party of this
823 protocol thus we will wait that connecting party will make
825 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
826 &sock->protocol, proto_ctx,
827 silc_server_connect_to_router_final);
829 /* Register timeout task. If the protocol is not executed inside
830 this timelimit the connection will be terminated. Currently
831 this is 15 seconds and is hard coded limit (XXX). */
832 proto_ctx->timeout_task =
833 silc_schedule_task_add(server->schedule, sock->sock,
834 silc_server_timeout_remote,
835 (void *)server, 15, 0,
839 /* Run the protocol */
840 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
843 /* Finalizes the connection to router. Registers a server task to the
844 queue so that we can accept new connections. */
846 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
848 SilcProtocol protocol = (SilcProtocol)context;
849 SilcServerConnAuthInternalContext *ctx =
850 (SilcServerConnAuthInternalContext *)protocol->context;
851 SilcServer server = (SilcServer)ctx->server;
852 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
853 SilcSocketConnection sock = ctx->sock;
854 SilcServerEntry id_entry;
856 SilcServerHBContext hb_context;
857 unsigned char *id_string;
859 SilcIDListData idata;
861 SILC_LOG_DEBUG(("Start"));
863 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
864 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
865 /* Error occured during protocol */
866 silc_free(ctx->dest_id);
867 silc_server_disconnect_remote(server, sock, "Server closed connection: "
868 "Authentication failed");
872 /* Add a task to the queue. This task receives new connections to the
873 server. This task remains on the queue until the end of the program. */
874 if (!server->listenning && !sconn->backup) {
875 silc_schedule_task_add(server->schedule, server->sock,
876 silc_server_accept_new_connection,
877 (void *)server, 0, 0,
879 SILC_TASK_PRI_NORMAL);
880 server->listenning = TRUE;
883 /* Send NEW_SERVER packet to the router. We will become registered
884 to the SILC network after sending this packet. */
885 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
886 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
887 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
888 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
889 silc_buffer_format(packet,
890 SILC_STR_UI_SHORT(id_len),
891 SILC_STR_UI_XNSTRING(id_string, id_len),
892 SILC_STR_UI_SHORT(strlen(server->server_name)),
893 SILC_STR_UI_XNSTRING(server->server_name,
894 strlen(server->server_name)),
897 /* Send the packet */
898 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
899 packet->data, packet->len, TRUE);
900 silc_buffer_free(packet);
901 silc_free(id_string);
903 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
905 /* Check that we do not have this ID already */
906 id_entry = silc_idlist_find_server_by_id(server->local_list,
907 ctx->dest_id, TRUE, NULL);
909 silc_idcache_del_by_context(server->local_list->servers, id_entry);
911 id_entry = silc_idlist_find_server_by_id(server->global_list,
912 ctx->dest_id, TRUE, NULL);
914 silc_idcache_del_by_context(server->global_list->servers, id_entry);
917 SILC_LOG_DEBUG(("New server id(%s)",
918 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
920 /* Add the connected router to global server list */
921 id_entry = silc_idlist_add_server(server->global_list,
922 strdup(sock->hostname),
923 SILC_ROUTER, ctx->dest_id, NULL, sock);
925 silc_free(ctx->dest_id);
926 silc_server_disconnect_remote(server, sock, "Server closed connection: "
927 "Authentication failed");
931 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
932 silc_free(sock->user_data);
933 sock->user_data = (void *)id_entry;
934 sock->type = SILC_SOCKET_TYPE_ROUTER;
935 idata = (SilcIDListData)sock->user_data;
936 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
938 /* Perform keepalive. The `hb_context' will be freed automatically
939 when finally calling the silc_socket_free function. XXX hardcoded
941 hb_context = silc_calloc(1, sizeof(*hb_context));
942 hb_context->server = server;
943 silc_socket_set_heartbeat(sock, 600, hb_context,
944 silc_server_perform_heartbeat,
947 /* Register re-key timeout */
948 idata->rekey->timeout = 3600; /* XXX hardcoded */
949 idata->rekey->context = (void *)server;
950 silc_schedule_task_add(server->schedule, sock->sock,
951 silc_server_rekey_callback,
952 (void *)sock, idata->rekey->timeout, 0,
953 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
955 if (!sconn->backup) {
956 /* Mark this router our primary router if we're still standalone */
957 if (server->standalone) {
958 server->id_entry->router = id_entry;
959 server->router = id_entry;
960 server->standalone = FALSE;
962 /* If we are router then announce our possible servers. */
963 if (server->server_type == SILC_ROUTER)
964 silc_server_announce_servers(server, FALSE, 0,
965 server->router->connection);
967 /* Announce our clients and channels to the router */
968 silc_server_announce_clients(server, 0, server->router->connection);
969 silc_server_announce_channels(server, 0, server->router->connection);
972 /* Add this server to be our backup router */
973 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
974 sconn->backup_replace_port, FALSE);
977 sock->protocol = NULL;
979 /* Call the completion callback to indicate that we've connected to
982 (*sconn->callback)(server, id_entry, sconn->callback_context);
985 /* Free the temporary connection data context */
987 silc_free(sconn->remote_host);
988 silc_free(sconn->backup_replace_ip);
992 /* Free the protocol object */
993 if (sock->protocol == protocol)
994 sock->protocol = NULL;
995 silc_protocol_free(protocol);
997 silc_packet_context_free(ctx->packet);
999 silc_ske_free(ctx->ske);
1000 silc_free(ctx->auth_data);
1004 /* Host lookup callbcak that is called after the incoming connection's
1005 IP and FQDN lookup is performed. This will actually check the acceptance
1006 of the incoming connection and will register the key exchange protocol
1007 for this connection. */
1010 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1013 SilcServer server = (SilcServer)context;
1014 SilcServerKEInternalContext *proto_ctx;
1015 void *cconfig, *sconfig, *rconfig;
1016 SilcServerConfigSectionDenyConnection *deny;
1019 SILC_LOG_DEBUG(("Start"));
1021 /* Check whether we could resolve both IP and FQDN. */
1022 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1023 server->params->require_reverse_mapping)) {
1024 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1025 sock->hostname ? sock->hostname :
1026 sock->ip ? sock->ip : ""));
1027 server->stat.conn_failures++;
1028 silc_server_disconnect_remote(server, sock,
1029 "Server closed connection: Unknown host");
1033 /* Register the connection for network input and output. This sets
1034 that scheduler will listen for incoming packets for this connection
1035 and sets that outgoing packets may be sent to this connection as well.
1036 However, this doesn't set the scheduler for outgoing traffic, it
1037 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1038 later when outgoing data is available. */
1039 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1041 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
1044 port = server->sockets[server->sock]->port; /* Listenning port */
1046 /* Check whether this connection is denied to connect to us. */
1047 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1049 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1052 /* The connection is denied */
1053 SILC_LOG_INFO(("Connection %s (%s) is denied",
1054 sock->hostname, sock->ip));
1055 silc_server_disconnect_remote(server, sock, deny->comment ?
1057 "Server closed connection: "
1058 "Connection refused");
1059 server->stat.conn_failures++;
1063 /* Check whether we have configred this sort of connection at all. We
1064 have to check all configurations since we don't know what type of
1065 connection this is. */
1066 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1068 cconfig = silc_server_config_find_client_conn(server->config,
1071 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1074 sconfig = silc_server_config_find_server_conn(server->config,
1077 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1079 rconfig = silc_server_config_find_router_conn(server->config,
1082 if (!cconfig && !sconfig && !rconfig) {
1083 silc_server_disconnect_remote(server, sock,
1084 "Server closed connection: "
1085 "Connection refused");
1086 server->stat.conn_failures++;
1090 /* The connection is allowed */
1092 /* Allocate internal context for key exchange protocol. This is
1093 sent as context for the protocol. */
1094 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1095 proto_ctx->server = context;
1096 proto_ctx->sock = sock;
1097 proto_ctx->rng = server->rng;
1098 proto_ctx->responder = TRUE;
1099 proto_ctx->cconfig = cconfig;
1100 proto_ctx->sconfig = sconfig;
1101 proto_ctx->rconfig = rconfig;
1103 /* Prepare the connection for key exchange protocol. We allocate the
1104 protocol but will not start it yet. The connector will be the
1105 initiator of the protocol thus we will wait for initiation from
1106 there before we start the protocol. */
1107 server->stat.auth_attempts++;
1108 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1109 &sock->protocol, proto_ctx,
1110 silc_server_accept_new_connection_second);
1112 /* Register a timeout task that will be executed if the connector
1113 will not start the key exchange protocol within 60 seconds. For
1114 now, this is a hard coded limit. After 60 secs the connection will
1115 be closed if the key exchange protocol has not been started. */
1116 proto_ctx->timeout_task =
1117 silc_schedule_task_add(server->schedule, sock->sock,
1118 silc_server_timeout_remote,
1124 /* Accepts new connections to the server. Accepting new connections are
1125 done in three parts to make it async. */
1127 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1129 SilcServer server = (SilcServer)context;
1130 SilcSocketConnection newsocket;
1133 SILC_LOG_DEBUG(("Accepting new connection"));
1135 server->stat.conn_attempts++;
1137 sock = silc_net_accept_connection(server->sock);
1139 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1140 server->stat.conn_failures++;
1144 /* Check max connections */
1145 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1146 SILC_LOG_ERROR(("Refusing connection, server is full"));
1147 server->stat.conn_failures++;
1151 /* Set socket options */
1152 silc_net_set_socket_nonblock(sock);
1153 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1155 /* We don't create a ID yet, since we don't know what type of connection
1156 this is yet. But, we do add the connection to the socket table. */
1157 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1158 server->sockets[sock] = newsocket;
1160 /* Perform asynchronous host lookup. This will lookup the IP and the
1161 FQDN of the remote connection. After the lookup is done the connection
1162 is accepted further. */
1163 silc_socket_host_lookup(newsocket, TRUE,
1164 silc_server_accept_new_connection_lookup, context,
1168 /* Second part of accepting new connection. Key exchange protocol has been
1169 performed and now it is time to do little connection authentication
1170 protocol to figure out whether this connection is client or server
1171 and whether it has right to access this server (especially server
1172 connections needs to be authenticated). */
1174 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1176 SilcProtocol protocol = (SilcProtocol)context;
1177 SilcServerKEInternalContext *ctx =
1178 (SilcServerKEInternalContext *)protocol->context;
1179 SilcServer server = (SilcServer)ctx->server;
1180 SilcSocketConnection sock = ctx->sock;
1181 SilcServerConnAuthInternalContext *proto_ctx;
1183 SILC_LOG_DEBUG(("Start"));
1185 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1186 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1187 /* Error occured during protocol */
1188 silc_protocol_free(protocol);
1189 sock->protocol = NULL;
1190 silc_ske_free_key_material(ctx->keymat);
1192 silc_packet_context_free(ctx->packet);
1194 silc_ske_free(ctx->ske);
1195 silc_free(ctx->dest_id);
1197 silc_schedule_task_del_by_callback(server->schedule,
1198 silc_server_failure_callback);
1199 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1200 "Key exchange failed");
1201 server->stat.auth_failures++;
1205 /* We now have the key material as the result of the key exchange
1206 protocol. Take the key material into use. Free the raw key material
1207 as soon as we've set them into use. */
1208 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1209 ctx->sock, ctx->keymat,
1210 ctx->ske->prop->cipher,
1211 ctx->ske->prop->pkcs,
1212 ctx->ske->prop->hash,
1213 ctx->ske->prop->hmac,
1214 ctx->ske->prop->group,
1216 silc_protocol_free(protocol);
1217 sock->protocol = NULL;
1218 silc_ske_free_key_material(ctx->keymat);
1220 silc_packet_context_free(ctx->packet);
1222 silc_ske_free(ctx->ske);
1223 silc_free(ctx->dest_id);
1225 silc_schedule_task_del_by_callback(server->schedule,
1226 silc_server_failure_callback);
1227 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1228 "Key exchange failed");
1229 server->stat.auth_failures++;
1232 silc_ske_free_key_material(ctx->keymat);
1234 /* Allocate internal context for the authentication protocol. This
1235 is sent as context for the protocol. */
1236 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1237 proto_ctx->server = (void *)server;
1238 proto_ctx->sock = sock;
1239 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1240 proto_ctx->responder = TRUE;
1241 proto_ctx->dest_id_type = ctx->dest_id_type;
1242 proto_ctx->dest_id = ctx->dest_id;
1243 proto_ctx->cconfig = ctx->cconfig;
1244 proto_ctx->sconfig = ctx->sconfig;
1245 proto_ctx->rconfig = ctx->rconfig;
1247 /* Free old protocol as it is finished now */
1248 silc_protocol_free(protocol);
1250 silc_packet_context_free(ctx->packet);
1252 sock->protocol = NULL;
1254 /* Allocate the authentication protocol. This is allocated here
1255 but we won't start it yet. We will be receiving party of this
1256 protocol thus we will wait that connecting party will make
1257 their first move. */
1258 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1259 &sock->protocol, proto_ctx,
1260 silc_server_accept_new_connection_final);
1262 /* Register timeout task. If the protocol is not executed inside
1263 this timelimit the connection will be terminated. Currently
1264 this is 60 seconds and is hard coded limit (XXX). */
1265 proto_ctx->timeout_task =
1266 silc_schedule_task_add(server->schedule, sock->sock,
1267 silc_server_timeout_remote,
1268 (void *)server, 60, 0,
1273 /* Final part of accepting new connection. The connection has now
1274 been authenticated and keys has been exchanged. We also know whether
1275 this is client or server connection. */
1277 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1279 SilcProtocol protocol = (SilcProtocol)context;
1280 SilcServerConnAuthInternalContext *ctx =
1281 (SilcServerConnAuthInternalContext *)protocol->context;
1282 SilcServer server = (SilcServer)ctx->server;
1283 SilcSocketConnection sock = ctx->sock;
1284 SilcServerHBContext hb_context;
1285 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1286 void *id_entry = NULL;
1288 SILC_LOG_DEBUG(("Start"));
1290 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1291 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1292 /* Error occured during protocol */
1293 silc_protocol_free(protocol);
1294 sock->protocol = NULL;
1296 silc_packet_context_free(ctx->packet);
1298 silc_ske_free(ctx->ske);
1299 silc_free(ctx->dest_id);
1301 silc_schedule_task_del_by_callback(server->schedule,
1302 silc_server_failure_callback);
1303 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1304 "Authentication failed");
1305 server->stat.auth_failures++;
1309 entry->data.last_receive = time(NULL);
1311 switch (ctx->conn_type) {
1312 case SILC_SOCKET_TYPE_CLIENT:
1314 SilcClientEntry client;
1316 SILC_LOG_DEBUG(("Remote host is client"));
1317 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1320 /* Add the client to the client ID cache. The nickname and Client ID
1321 and other information is created after we have received NEW_CLIENT
1322 packet from client. */
1323 client = silc_idlist_add_client(server->local_list,
1324 NULL, NULL, NULL, NULL, NULL, sock, 0);
1326 SILC_LOG_ERROR(("Could not add new client to cache"));
1327 silc_free(sock->user_data);
1328 silc_server_disconnect_remote(server, sock,
1329 "Server closed connection: "
1330 "Authentication failed");
1331 server->stat.auth_failures++;
1336 server->stat.my_clients++;
1337 server->stat.clients++;
1338 if (server->server_type == SILC_ROUTER)
1339 server->stat.cell_clients++;
1341 id_entry = (void *)client;
1344 case SILC_SOCKET_TYPE_SERVER:
1345 case SILC_SOCKET_TYPE_ROUTER:
1347 SilcServerEntry new_server;
1348 SilcServerConfigSectionServerConnection *conn =
1349 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1350 ctx->sconfig : ctx->rconfig;
1352 SILC_LOG_DEBUG(("Remote host is %s",
1353 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1354 "server" : (conn->backup_router ?
1355 "backup router" : "router")));
1356 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1357 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1358 "server" : (conn->backup_router ?
1359 "backup router" : "router")));
1361 /* Add the server into server cache. The server name and Server ID
1362 is updated after we have received NEW_SERVER packet from the
1363 server. We mark ourselves as router for this server if we really
1366 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1367 server->local_list : (conn->backup_router ?
1368 server->local_list :
1369 server->global_list)),
1371 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1372 SILC_SERVER : SILC_ROUTER),
1374 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1375 server->id_entry : (conn->backup_router ?
1376 server->id_entry : NULL)),
1379 SILC_LOG_ERROR(("Could not add new server to cache"));
1380 silc_free(sock->user_data);
1381 silc_server_disconnect_remote(server, sock,
1382 "Server closed connection: "
1383 "Authentication failed");
1384 server->stat.auth_failures++;
1389 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1390 server->stat.my_servers++;
1392 server->stat.my_routers++;
1393 server->stat.servers++;
1395 id_entry = (void *)new_server;
1397 /* If the incoming connection is router and marked as backup router
1398 then add it to be one of our backups */
1399 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1400 silc_server_backup_add(server, new_server, conn->backup_replace_ip,
1401 conn->backup_replace_port, conn->backup_local);
1403 /* Change it back to SERVER type since that's what it really is. */
1404 if (conn->backup_local)
1405 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1407 new_server->server_type = SILC_BACKUP_ROUTER;
1410 /* Check whether this connection is to be our primary router connection
1411 if we do not already have the primary route. */
1412 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1413 if (silc_server_config_is_primary_route(server->config) &&
1417 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1418 server->standalone = FALSE;
1419 if (!server->id_entry->router) {
1420 server->id_entry->router = id_entry;
1421 server->router = id_entry;
1431 sock->type = ctx->conn_type;
1433 /* Add the common data structure to the ID entry. */
1435 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1437 /* Add to sockets internal pointer for fast referencing */
1438 silc_free(sock->user_data);
1439 sock->user_data = id_entry;
1441 /* Connection has been fully established now. Everything is ok. */
1442 SILC_LOG_DEBUG(("New connection authenticated"));
1444 /* Perform keepalive. The `hb_context' will be freed automatically
1445 when finally calling the silc_socket_free function. XXX hardcoded
1447 hb_context = silc_calloc(1, sizeof(*hb_context));
1448 hb_context->server = server;
1449 silc_socket_set_heartbeat(sock, 600, hb_context,
1450 silc_server_perform_heartbeat,
1454 silc_schedule_task_del_by_callback(server->schedule,
1455 silc_server_failure_callback);
1456 silc_protocol_free(protocol);
1458 silc_packet_context_free(ctx->packet);
1460 silc_ske_free(ctx->ske);
1461 silc_free(ctx->dest_id);
1463 sock->protocol = NULL;
1466 /* This function is used to read packets from network and send packets to
1467 network. This is usually a generic task. */
1469 SILC_TASK_CALLBACK(silc_server_packet_process)
1471 SilcServer server = (SilcServer)context;
1472 SilcSocketConnection sock = server->sockets[fd];
1473 SilcIDListData idata;
1474 SilcCipher cipher = NULL;
1475 SilcHmac hmac = NULL;
1476 uint32 sequence = 0;
1482 SILC_LOG_DEBUG(("Processing packet"));
1484 /* Packet sending */
1486 if (type == SILC_TASK_WRITE) {
1487 /* Do not send data to disconnected connection */
1488 if (SILC_IS_DISCONNECTED(sock))
1491 server->stat.packets_sent++;
1493 if (sock->outbuf->data - sock->outbuf->head)
1494 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1496 /* Send the packet */
1497 ret = silc_packet_send(sock, TRUE);
1499 /* If returned -2 could not write to connection now, will do
1505 SILC_LOG_ERROR(("Error sending packet to 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" :
1514 /* The packet has been sent and now it is time to set the connection
1515 back to only for input. When there is again some outgoing data
1516 available for this connection it will be set for output as well.
1517 This call clears the output setting and sets it only for input. */
1518 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1519 SILC_UNSET_OUTBUF_PENDING(sock);
1521 silc_buffer_clear(sock->outbuf);
1525 /* Packet receiving */
1527 /* Read some data from connection */
1528 ret = silc_packet_receive(sock);
1532 SILC_LOG_ERROR(("Error receiving packet from connection "
1533 "%s:%d [%s] %s", sock->hostname, sock->port,
1534 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1535 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1536 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1537 "Router"), strerror(errno)));
1543 SILC_LOG_DEBUG(("Read EOF"));
1545 /* If connection is disconnecting already we will finally
1546 close the connection */
1547 if (SILC_IS_DISCONNECTING(sock)) {
1548 if (sock->user_data)
1549 silc_server_free_sock_user_data(server, sock);
1550 silc_server_close_connection(server, sock);
1554 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1555 SILC_SET_DISCONNECTING(sock);
1557 if (sock->user_data)
1558 silc_server_free_sock_user_data(server, sock);
1559 silc_server_close_connection(server, sock);
1563 /* If connection is disconnecting or disconnected we will ignore
1565 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1566 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1570 server->stat.packets_received++;
1572 /* Get keys and stuff from ID entry */
1573 idata = (SilcIDListData)sock->user_data;
1575 cipher = idata->receive_key;
1576 hmac = idata->hmac_receive;
1577 sequence = idata->psn_receive;
1580 /* Process the packet. This will call the parser that will then
1581 decrypt and parse the packet. */
1582 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1583 TRUE : FALSE, cipher, hmac, sequence,
1584 silc_server_packet_parse, server);
1587 /* Parses whole packet, received earlier. */
1589 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1591 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1592 SilcServer server = (SilcServer)parse_ctx->context;
1593 SilcSocketConnection sock = parse_ctx->sock;
1594 SilcPacketContext *packet = parse_ctx->packet;
1595 SilcIDListData idata = (SilcIDListData)sock->user_data;
1598 SILC_LOG_DEBUG(("Start"));
1600 /* Parse the packet */
1601 if (parse_ctx->normal)
1602 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1604 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1606 /* If entry is disabled ignore what we got. */
1607 if (ret != SILC_PACKET_RESUME_ROUTER &&
1608 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1609 SILC_LOG_DEBUG(("Connection is disabled"));
1613 if (ret == SILC_PACKET_NONE)
1616 /* Check that the the current client ID is same as in the client's packet. */
1617 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1618 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1619 if (client && client->id) {
1620 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1621 packet->src_id_type);
1622 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1630 if (server->server_type == SILC_ROUTER) {
1631 /* Route the packet if it is not destined to us. Other ID types but
1632 server are handled separately after processing them. */
1633 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1634 packet->dst_id_type == SILC_ID_SERVER &&
1635 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1636 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1638 /* Route the packet to fastest route for the destination ID */
1639 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1640 packet->dst_id_type);
1643 silc_server_packet_route(server,
1644 silc_server_route_get(server, id,
1645 packet->dst_id_type),
1652 /* Parse the incoming packet type */
1653 silc_server_packet_parse_type(server, sock, packet);
1655 if (server->server_type == SILC_ROUTER) {
1656 /* Broadcast packet if it is marked as broadcast packet and it is
1657 originated from router and we are router. */
1658 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1659 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1660 !server->standalone) {
1661 /* Broadcast to our primary route */
1662 silc_server_packet_broadcast(server, server->router->connection, packet);
1664 /* If we have backup routers then we need to feed all broadcast
1665 data to those servers. */
1666 silc_server_backup_broadcast(server, sock, packet);
1671 silc_packet_context_free(packet);
1672 silc_free(parse_ctx);
1675 /* Parser callback called by silc_packet_receive_process. This merely
1676 registers timeout that will handle the actual parsing when appropriate. */
1678 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1681 SilcServer server = (SilcServer)context;
1682 SilcSocketConnection sock = parser_context->sock;
1683 SilcIDListData idata = (SilcIDListData)sock->user_data;
1686 idata->psn_receive = parser_context->packet->sequence + 1;
1688 /* If protocol for this connection is key exchange or rekey then we'll
1689 process all packets synchronously, since there might be packets in
1690 queue that we are not able to decrypt without first processing the
1691 packets before them. */
1692 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1693 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1694 (sock->protocol && sock->protocol->protocol &&
1695 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1696 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1697 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1700 /* Reprocess data since we'll return FALSE here. This is because
1701 the idata->receive_key might have become valid in the last packet
1702 and we want to call this processor with valid cipher. */
1704 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1705 TRUE : FALSE, idata->receive_key,
1706 idata->hmac_receive, idata->psn_receive,
1707 silc_server_packet_parse, server);
1709 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1710 TRUE : FALSE, NULL, NULL, 0,
1711 silc_server_packet_parse, server);
1715 switch (sock->type) {
1716 case SILC_SOCKET_TYPE_UNKNOWN:
1717 case SILC_SOCKET_TYPE_CLIENT:
1718 /* Parse the packet with timeout */
1719 silc_schedule_task_add(server->schedule, sock->sock,
1720 silc_server_packet_parse_real,
1721 (void *)parser_context, 0, 100000,
1723 SILC_TASK_PRI_NORMAL);
1725 case SILC_SOCKET_TYPE_SERVER:
1726 case SILC_SOCKET_TYPE_ROUTER:
1727 /* Packets from servers are parsed immediately */
1728 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1738 /* Parses the packet type and calls what ever routines the packet type
1739 requires. This is done for all incoming packets. */
1741 void silc_server_packet_parse_type(SilcServer server,
1742 SilcSocketConnection sock,
1743 SilcPacketContext *packet)
1745 SilcPacketType type = packet->type;
1746 SilcIDListData idata = (SilcIDListData)sock->user_data;
1748 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1750 /* Parse the packet type */
1752 case SILC_PACKET_DISCONNECT:
1753 SILC_LOG_DEBUG(("Disconnect packet"));
1754 if (packet->flags & SILC_PACKET_FLAG_LIST)
1758 case SILC_PACKET_SUCCESS:
1760 * Success received for something. For now we can have only
1761 * one protocol for connection executing at once hence this
1762 * success message is for whatever protocol is executing currently.
1764 SILC_LOG_DEBUG(("Success packet"));
1765 if (packet->flags & SILC_PACKET_FLAG_LIST)
1768 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1771 case SILC_PACKET_FAILURE:
1773 * Failure received for something. For now we can have only
1774 * one protocol for connection executing at once hence this
1775 * failure message is for whatever protocol is executing currently.
1777 SILC_LOG_DEBUG(("Failure packet"));
1778 if (packet->flags & SILC_PACKET_FLAG_LIST)
1780 if (sock->protocol) {
1781 SilcServerFailureContext f;
1782 f = silc_calloc(1, sizeof(*f));
1786 /* We will wait 5 seconds to process this failure packet */
1787 silc_schedule_task_add(server->schedule, sock->sock,
1788 silc_server_failure_callback, (void *)f, 5, 0,
1789 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1793 case SILC_PACKET_REJECT:
1794 SILC_LOG_DEBUG(("Reject packet"));
1795 if (packet->flags & SILC_PACKET_FLAG_LIST)
1800 case SILC_PACKET_NOTIFY:
1802 * Received notify packet. Server can receive notify packets from
1803 * router. Server then relays the notify messages to clients if needed.
1805 SILC_LOG_DEBUG(("Notify packet"));
1806 if (packet->flags & SILC_PACKET_FLAG_LIST)
1807 silc_server_notify_list(server, sock, packet);
1809 silc_server_notify(server, sock, packet);
1815 case SILC_PACKET_CHANNEL_MESSAGE:
1817 * Received channel message. Channel messages are special packets
1818 * (although probably most common ones) thus they are handled
1821 SILC_LOG_DEBUG(("Channel Message packet"));
1822 if (packet->flags & SILC_PACKET_FLAG_LIST)
1824 idata->last_receive = time(NULL);
1825 silc_server_channel_message(server, sock, packet);
1828 case SILC_PACKET_CHANNEL_KEY:
1830 * Received key for channel. As channels are created by the router
1831 * the keys are as well. We will distribute the key to all of our
1832 * locally connected clients on the particular channel. Router
1833 * never receives this channel and thus is ignored.
1835 SILC_LOG_DEBUG(("Channel Key packet"));
1836 if (packet->flags & SILC_PACKET_FLAG_LIST)
1838 silc_server_channel_key(server, sock, packet);
1844 case SILC_PACKET_COMMAND:
1846 * Recived command. Processes the command request and allocates the
1847 * command context and calls the command.
1849 SILC_LOG_DEBUG(("Command packet"));
1850 if (packet->flags & SILC_PACKET_FLAG_LIST)
1852 silc_server_command_process(server, sock, packet);
1855 case SILC_PACKET_COMMAND_REPLY:
1857 * Received command reply packet. Received command reply to command. It
1858 * may be reply to command sent by us or reply to command sent by client
1859 * that we've routed further.
1861 SILC_LOG_DEBUG(("Command Reply packet"));
1862 if (packet->flags & SILC_PACKET_FLAG_LIST)
1864 silc_server_command_reply(server, sock, packet);
1868 * Private Message packets
1870 case SILC_PACKET_PRIVATE_MESSAGE:
1872 * Received private message packet. The packet is coming from either
1875 SILC_LOG_DEBUG(("Private Message packet"));
1876 if (packet->flags & SILC_PACKET_FLAG_LIST)
1878 idata->last_receive = time(NULL);
1879 silc_server_private_message(server, sock, packet);
1882 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1884 * Private message key packet.
1886 if (packet->flags & SILC_PACKET_FLAG_LIST)
1888 silc_server_private_message_key(server, sock, packet);
1892 * Key Exchange protocol packets
1894 case SILC_PACKET_KEY_EXCHANGE:
1895 SILC_LOG_DEBUG(("KE packet"));
1896 if (packet->flags & SILC_PACKET_FLAG_LIST)
1899 if (sock->protocol && sock->protocol->protocol &&
1900 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1902 SilcServerKEInternalContext *proto_ctx =
1903 (SilcServerKEInternalContext *)sock->protocol->context;
1905 proto_ctx->packet = silc_packet_context_dup(packet);
1907 /* Let the protocol handle the packet */
1908 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1910 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1911 "protocol active, packet dropped."));
1915 case SILC_PACKET_KEY_EXCHANGE_1:
1916 SILC_LOG_DEBUG(("KE 1 packet"));
1917 if (packet->flags & SILC_PACKET_FLAG_LIST)
1920 if (sock->protocol && sock->protocol->protocol &&
1921 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1922 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1924 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1925 SilcServerRekeyInternalContext *proto_ctx =
1926 (SilcServerRekeyInternalContext *)sock->protocol->context;
1928 if (proto_ctx->packet)
1929 silc_packet_context_free(proto_ctx->packet);
1931 proto_ctx->packet = silc_packet_context_dup(packet);
1933 /* Let the protocol handle the packet */
1934 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1936 SilcServerKEInternalContext *proto_ctx =
1937 (SilcServerKEInternalContext *)sock->protocol->context;
1939 if (proto_ctx->packet)
1940 silc_packet_context_free(proto_ctx->packet);
1942 proto_ctx->packet = silc_packet_context_dup(packet);
1943 proto_ctx->dest_id_type = packet->src_id_type;
1944 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1945 packet->src_id_type);
1946 if (!proto_ctx->dest_id)
1949 /* Let the protocol handle the packet */
1950 silc_protocol_execute(sock->protocol, server->schedule,
1954 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1955 "protocol active, packet dropped."));
1959 case SILC_PACKET_KEY_EXCHANGE_2:
1960 SILC_LOG_DEBUG(("KE 2 packet"));
1961 if (packet->flags & SILC_PACKET_FLAG_LIST)
1964 if (sock->protocol && sock->protocol->protocol &&
1965 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1966 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1968 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1969 SilcServerRekeyInternalContext *proto_ctx =
1970 (SilcServerRekeyInternalContext *)sock->protocol->context;
1972 if (proto_ctx->packet)
1973 silc_packet_context_free(proto_ctx->packet);
1975 proto_ctx->packet = silc_packet_context_dup(packet);
1977 /* Let the protocol handle the packet */
1978 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1980 SilcServerKEInternalContext *proto_ctx =
1981 (SilcServerKEInternalContext *)sock->protocol->context;
1983 if (proto_ctx->packet)
1984 silc_packet_context_free(proto_ctx->packet);
1986 proto_ctx->packet = silc_packet_context_dup(packet);
1987 proto_ctx->dest_id_type = packet->src_id_type;
1988 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1989 packet->src_id_type);
1990 if (!proto_ctx->dest_id)
1993 /* Let the protocol handle the packet */
1994 silc_protocol_execute(sock->protocol, server->schedule,
1998 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1999 "protocol active, packet dropped."));
2003 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2005 * Connection authentication request packet. When we receive this packet
2006 * we will send to the other end information about our mandatory
2007 * authentication method for the connection. This packet maybe received
2010 SILC_LOG_DEBUG(("Connection authentication request packet"));
2011 if (packet->flags & SILC_PACKET_FLAG_LIST)
2013 silc_server_connection_auth_request(server, sock, packet);
2017 * Connection Authentication protocol packets
2019 case SILC_PACKET_CONNECTION_AUTH:
2020 /* Start of the authentication protocol. We receive here the
2021 authentication data and will verify it. */
2022 SILC_LOG_DEBUG(("Connection auth packet"));
2023 if (packet->flags & SILC_PACKET_FLAG_LIST)
2026 if (sock->protocol && sock->protocol->protocol->type
2027 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2029 SilcServerConnAuthInternalContext *proto_ctx =
2030 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2032 proto_ctx->packet = silc_packet_context_dup(packet);
2034 /* Let the protocol handle the packet */
2035 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2037 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2038 "protocol active, packet dropped."));
2042 case SILC_PACKET_NEW_ID:
2044 * Received New ID packet. This includes some new ID that has been
2045 * created. It may be for client, server or channel. This is the way
2046 * to distribute information about new registered entities in the
2049 SILC_LOG_DEBUG(("New ID packet"));
2050 if (packet->flags & SILC_PACKET_FLAG_LIST)
2051 silc_server_new_id_list(server, sock, packet);
2053 silc_server_new_id(server, sock, packet);
2056 case SILC_PACKET_NEW_CLIENT:
2058 * Received new client packet. This includes client information that
2059 * we will use to create initial client ID. After creating new
2060 * ID we will send it to the client.
2062 SILC_LOG_DEBUG(("New Client packet"));
2063 if (packet->flags & SILC_PACKET_FLAG_LIST)
2065 silc_server_new_client(server, sock, packet);
2068 case SILC_PACKET_NEW_SERVER:
2070 * Received new server packet. This includes Server ID and some other
2071 * information that we may save. This is received after server has
2074 SILC_LOG_DEBUG(("New Server packet"));
2075 if (packet->flags & SILC_PACKET_FLAG_LIST)
2077 silc_server_new_server(server, sock, packet);
2080 case SILC_PACKET_NEW_CHANNEL:
2082 * Received new channel packet. Information about new channel in the
2083 * network are distributed using this packet.
2085 SILC_LOG_DEBUG(("New Channel packet"));
2086 if (packet->flags & SILC_PACKET_FLAG_LIST)
2087 silc_server_new_channel_list(server, sock, packet);
2089 silc_server_new_channel(server, sock, packet);
2092 case SILC_PACKET_HEARTBEAT:
2094 * Received heartbeat.
2096 SILC_LOG_DEBUG(("Heartbeat packet"));
2097 if (packet->flags & SILC_PACKET_FLAG_LIST)
2101 case SILC_PACKET_KEY_AGREEMENT:
2103 * Received heartbeat.
2105 SILC_LOG_DEBUG(("Key agreement packet"));
2106 if (packet->flags & SILC_PACKET_FLAG_LIST)
2108 silc_server_key_agreement(server, sock, packet);
2111 case SILC_PACKET_REKEY:
2113 * Received re-key packet. The sender wants to regenerate the session
2116 SILC_LOG_DEBUG(("Re-key packet"));
2117 if (packet->flags & SILC_PACKET_FLAG_LIST)
2119 silc_server_rekey(server, sock, packet);
2122 case SILC_PACKET_REKEY_DONE:
2124 * The re-key is done.
2126 SILC_LOG_DEBUG(("Re-key done packet"));
2127 if (packet->flags & SILC_PACKET_FLAG_LIST)
2130 if (sock->protocol && sock->protocol->protocol &&
2131 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2133 SilcServerRekeyInternalContext *proto_ctx =
2134 (SilcServerRekeyInternalContext *)sock->protocol->context;
2136 if (proto_ctx->packet)
2137 silc_packet_context_free(proto_ctx->packet);
2139 proto_ctx->packet = silc_packet_context_dup(packet);
2141 /* Let the protocol handle the packet */
2142 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2144 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2145 "protocol active, packet dropped."));
2149 case SILC_PACKET_FTP:
2151 SILC_LOG_DEBUG(("FTP packet"));
2152 if (packet->flags & SILC_PACKET_FLAG_LIST)
2154 silc_server_ftp(server, sock, packet);
2157 case SILC_PACKET_RESUME_ROUTER:
2158 /* Resume router packet received. This packet is received for backup
2159 router resuming protocol. */
2160 SILC_LOG_DEBUG(("Resume router packet"));
2161 if (packet->flags & SILC_PACKET_FLAG_LIST)
2163 silc_server_backup_resume_router(server, sock, packet);
2167 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2173 /* Creates connection to a remote router. */
2175 void silc_server_create_connection(SilcServer server,
2176 char *remote_host, uint32 port)
2178 SilcServerConnection sconn;
2180 /* Allocate connection object for hold connection specific stuff. */
2181 sconn = silc_calloc(1, sizeof(*sconn));
2182 sconn->server = server;
2183 sconn->remote_host = strdup(remote_host);
2184 sconn->remote_port = port;
2186 silc_schedule_task_add(server->schedule, 0,
2187 silc_server_connect_router,
2188 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2189 SILC_TASK_PRI_NORMAL);
2192 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2194 silc_socket_free((SilcSocketConnection)context);
2197 /* Closes connection to socket connection */
2199 void silc_server_close_connection(SilcServer server,
2200 SilcSocketConnection sock)
2202 if (!server->sockets[sock->sock])
2205 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2207 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2208 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2209 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2212 /* We won't listen for this connection anymore */
2213 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2215 /* Unregister all tasks */
2216 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2218 /* Close the actual connection */
2219 silc_net_close_connection(sock->sock);
2220 server->sockets[sock->sock] = NULL;
2222 /* If sock->user_data is NULL then we'll check for active protocols
2223 here since the silc_server_free_sock_user_data has not been called
2224 for this connection. */
2225 if (!sock->user_data) {
2226 /* If any protocol is active cancel its execution. It will call
2227 the final callback which will finalize the disconnection. */
2228 if (sock->protocol) {
2229 silc_protocol_cancel(sock->protocol, server->schedule);
2230 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2231 silc_protocol_execute_final(sock->protocol, server->schedule);
2232 sock->protocol = NULL;
2237 silc_schedule_task_add(server->schedule, 0,
2238 silc_server_close_connection_final,
2239 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2240 SILC_TASK_PRI_NORMAL);
2243 /* Sends disconnect message to remote connection and disconnects the
2246 void silc_server_disconnect_remote(SilcServer server,
2247 SilcSocketConnection sock,
2248 const char *fmt, ...)
2251 unsigned char buf[4096];
2256 memset(buf, 0, sizeof(buf));
2258 vsprintf(buf, fmt, ap);
2261 SILC_LOG_DEBUG(("Disconnecting remote host"));
2263 /* Notify remote end that the conversation is over. The notify message
2264 is tried to be sent immediately. */
2265 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2266 buf, strlen(buf), TRUE);
2268 /* Mark the connection to be disconnected */
2269 SILC_SET_DISCONNECTED(sock);
2270 silc_server_close_connection(server, sock);
2275 SilcClientEntry client;
2276 } *FreeClientInternal;
2278 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2280 FreeClientInternal i = (FreeClientInternal)context;
2282 silc_idlist_del_data(i->client);
2283 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2287 /* Frees client data and notifies about client's signoff. */
2289 void silc_server_free_client_data(SilcServer server,
2290 SilcSocketConnection sock,
2291 SilcClientEntry client,
2295 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2297 /* If there is pending outgoing data for the client then purge it
2298 to the network before removing the client entry. */
2299 silc_server_packet_queue_purge(server, sock);
2304 /* Send SIGNOFF notify to routers. */
2305 if (notify && !server->standalone && server->router)
2306 silc_server_send_notify_signoff(server, server->router->connection,
2307 server->server_type == SILC_SERVER ?
2308 FALSE : TRUE, client->id, signoff);
2310 /* Remove client from all channels */
2312 silc_server_remove_from_channels(server, NULL, client,
2313 TRUE, signoff, TRUE);
2315 silc_server_remove_from_channels(server, NULL, client,
2316 FALSE, NULL, FALSE);
2318 /* We will not delete the client entry right away. We will take it
2319 into history (for WHOWAS command) for 5 minutes */
2322 silc_schedule_task_add(server->schedule, 0,
2323 silc_server_free_client_data_timeout,
2325 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2326 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2327 client->router = NULL;
2328 client->connection = NULL;
2330 /* Free the client entry and everything in it */
2331 server->stat.my_clients--;
2332 server->stat.clients--;
2333 if (server->server_type == SILC_ROUTER)
2334 server->stat.cell_clients--;
2337 /* Frees user_data pointer from socket connection object. This also sends
2338 appropriate notify packets to the network to inform about leaving
2341 void silc_server_free_sock_user_data(SilcServer server,
2342 SilcSocketConnection sock)
2344 SILC_LOG_DEBUG(("Start"));
2346 switch (sock->type) {
2347 case SILC_SOCKET_TYPE_CLIENT:
2349 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2350 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2353 case SILC_SOCKET_TYPE_SERVER:
2354 case SILC_SOCKET_TYPE_ROUTER:
2356 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2357 SilcServerEntry backup_router = NULL;
2360 backup_router = silc_server_backup_get(server, user_data->id);
2362 /* If this was our primary router connection then we're lost to
2363 the outside world. */
2364 if (server->router == user_data) {
2365 /* Check whether we have a backup router connection */
2366 if (!backup_router || backup_router == user_data) {
2367 silc_schedule_task_add(server->schedule, 0,
2368 silc_server_connect_to_router,
2371 SILC_TASK_PRI_NORMAL);
2373 server->id_entry->router = NULL;
2374 server->router = NULL;
2375 server->standalone = TRUE;
2376 backup_router = NULL;
2378 SILC_LOG_INFO(("New primary router is backup router %s",
2379 backup_router->server_name));
2380 SILC_LOG_DEBUG(("New primary router is backup router %s",
2381 backup_router->server_name));
2382 server->id_entry->router = backup_router;
2383 server->router = backup_router;
2384 server->router_connect = time(0);
2385 server->backup_primary = TRUE;
2386 if (server->server_type == SILC_BACKUP_ROUTER) {
2387 server->server_type = SILC_ROUTER;
2389 /* We'll need to constantly try to reconnect to the primary
2390 router so that we'll see when it comes back online. */
2391 silc_server_backup_reconnect(server, sock->ip, sock->port,
2392 silc_server_backup_connected,
2396 /* Mark this connection as replaced */
2397 silc_server_backup_replaced_add(server, user_data->id,
2400 } else if (backup_router) {
2401 SILC_LOG_INFO(("Enabling the use of backup router %s",
2402 backup_router->server_name));
2403 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2404 backup_router->server_name));
2406 /* Mark this connection as replaced */
2407 silc_server_backup_replaced_add(server, user_data->id,
2411 if (!backup_router) {
2412 /* Free all client entries that this server owns as they will
2413 become invalid now as well. */
2415 silc_server_remove_clients_by_server(server, user_data, TRUE);
2416 if (server->server_type == SILC_SERVER)
2417 silc_server_remove_channels_by_server(server, user_data);
2419 /* Update the client entries of this server to the new backup
2420 router. This also removes the clients that *really* was owned
2421 by the primary router and went down with the router. */
2422 silc_server_update_clients_by_server(server, user_data, backup_router,
2424 silc_server_update_servers_by_server(server, user_data, backup_router);
2425 if (server->server_type == SILC_SERVER)
2426 silc_server_update_channels_by_server(server, user_data,
2430 /* Free the server entry */
2431 silc_server_backup_del(server, user_data);
2432 silc_server_backup_replaced_del(server, user_data);
2433 silc_idlist_del_data(user_data);
2434 if (!silc_idlist_del_server(server->local_list, user_data))
2435 silc_idlist_del_server(server->global_list, user_data);
2436 server->stat.my_servers--;
2437 server->stat.servers--;
2438 if (server->server_type == SILC_ROUTER)
2439 server->stat.cell_servers--;
2441 if (backup_router) {
2442 /* Announce all of our stuff that was created about 5 minutes ago.
2443 The backup router knows all the other stuff already. */
2444 if (server->server_type == SILC_ROUTER)
2445 silc_server_announce_servers(server, FALSE, time(0) - 300,
2446 backup_router->connection);
2448 /* Announce our clients and channels to the router */
2449 silc_server_announce_clients(server, time(0) - 300,
2450 backup_router->connection);
2451 silc_server_announce_channels(server, time(0) - 300,
2452 backup_router->connection);
2458 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2460 silc_idlist_del_data(user_data);
2461 silc_free(user_data);
2466 /* If any protocol is active cancel its execution */
2467 if (sock->protocol) {
2468 silc_protocol_cancel(sock->protocol, server->schedule);
2469 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2470 silc_protocol_execute_final(sock->protocol, server->schedule);
2471 sock->protocol = NULL;
2474 sock->user_data = NULL;
2477 /* Removes client from all channels it has joined. This is used when client
2478 connection is disconnected. If the client on a channel is last, the
2479 channel is removed as well. This sends the SIGNOFF notify types. */
2481 void silc_server_remove_from_channels(SilcServer server,
2482 SilcSocketConnection sock,
2483 SilcClientEntry client,
2485 char *signoff_message,
2488 SilcChannelEntry channel;
2489 SilcChannelClientEntry chl;
2490 SilcHashTableList htl;
2493 SILC_LOG_DEBUG(("Start"));
2495 if (!client || !client->id)
2498 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2500 /* Remove the client from all channels. The client is removed from
2501 the channels' user list. */
2502 silc_hash_table_list(client->channels, &htl);
2503 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2504 channel = chl->channel;
2506 /* Remove channel from client's channel list */
2507 silc_hash_table_del(client->channels, channel);
2509 /* Remove channel if there is no users anymore */
2510 if (server->server_type == SILC_ROUTER &&
2511 silc_hash_table_count(channel->user_list) < 2) {
2513 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2514 if (silc_idlist_del_channel(server->local_list, channel))
2515 server->stat.my_channels--;
2517 silc_idlist_del_channel(server->global_list, channel);
2521 /* Remove client from channel's client list */
2522 silc_hash_table_del(channel->user_list, chl->client);
2524 /* If there is no global users on the channel anymore mark the channel
2525 as local channel. Do not check if the removed client is local client. */
2526 if (server->server_type != SILC_ROUTER && channel->global_users &&
2527 chl->client->router && !silc_server_channel_has_global(channel))
2528 channel->global_users = FALSE;
2531 server->stat.my_chanclients--;
2533 /* If there is not at least one local user on the channel then we don't
2534 need the channel entry anymore, we can remove it safely. */
2535 if (server->server_type != SILC_ROUTER &&
2536 !silc_server_channel_has_local(channel)) {
2537 /* Notify about leaving client if this channel has global users. */
2538 if (notify && channel->global_users)
2539 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2540 SILC_NOTIFY_TYPE_SIGNOFF,
2541 signoff_message ? 2 : 1,
2542 clidp->data, clidp->len,
2543 signoff_message, signoff_message ?
2544 strlen(signoff_message) : 0);
2547 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2549 if (channel->founder_key) {
2550 /* The founder auth data exists, do not remove the channel entry */
2551 SilcChannelClientEntry chl2;
2552 SilcHashTableList htl2;
2554 channel->disabled = TRUE;
2556 silc_hash_table_list(channel->user_list, &htl2);
2557 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2558 silc_hash_table_del(chl2->client->channels, channel);
2559 silc_hash_table_del(channel->user_list, chl2->client);
2565 /* Remove the channel entry */
2566 if (silc_idlist_del_channel(server->local_list, channel))
2567 server->stat.my_channels--;
2569 silc_idlist_del_channel(server->global_list, channel);
2573 /* Send notify to channel about client leaving SILC and thus
2574 the entire channel. */
2576 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2577 SILC_NOTIFY_TYPE_SIGNOFF,
2578 signoff_message ? 2 : 1,
2579 clidp->data, clidp->len,
2580 signoff_message, signoff_message ?
2581 strlen(signoff_message) : 0);
2583 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2584 /* Re-generate channel key */
2585 if (!silc_server_create_channel_key(server, channel, 0))
2588 /* Send the channel key to the channel. The key of course is not sent
2589 to the client who was removed from the channel. */
2590 silc_server_send_channel_key(server, client->connection, channel,
2591 server->server_type == SILC_ROUTER ?
2592 FALSE : !server->standalone);
2596 silc_buffer_free(clidp);
2599 /* Removes client from one channel. This is used for example when client
2600 calls LEAVE command to remove itself from the channel. Returns TRUE
2601 if channel still exists and FALSE if the channel is removed when
2602 last client leaves the channel. If `notify' is FALSE notify messages
2605 int silc_server_remove_from_one_channel(SilcServer server,
2606 SilcSocketConnection sock,
2607 SilcChannelEntry channel,
2608 SilcClientEntry client,
2611 SilcChannelClientEntry chl;
2614 SILC_LOG_DEBUG(("Start"));
2616 /* Get the entry to the channel, if this client is not on the channel
2618 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2621 /* Remove the client from the channel. The client is removed from
2622 the channel's user list. */
2624 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2626 /* Remove channel from client's channel list */
2627 silc_hash_table_del(client->channels, chl->channel);
2629 /* Remove channel if there is no users anymore */
2630 if (server->server_type == SILC_ROUTER &&
2631 silc_hash_table_count(channel->user_list) < 2) {
2633 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2634 if (silc_idlist_del_channel(server->local_list, channel))
2635 server->stat.my_channels--;
2637 silc_idlist_del_channel(server->global_list, channel);
2638 silc_buffer_free(clidp);
2642 /* Remove client from channel's client list */
2643 silc_hash_table_del(channel->user_list, chl->client);
2645 /* If there is no global users on the channel anymore mark the channel
2646 as local channel. Do not check if the client is local client. */
2647 if (server->server_type != SILC_ROUTER && channel->global_users &&
2648 chl->client->router && !silc_server_channel_has_global(channel))
2649 channel->global_users = FALSE;
2652 server->stat.my_chanclients--;
2654 /* If there is not at least one local user on the channel then we don't
2655 need the channel entry anymore, we can remove it safely. */
2656 if (server->server_type != SILC_ROUTER &&
2657 !silc_server_channel_has_local(channel)) {
2658 /* Notify about leaving client if this channel has global users. */
2659 if (notify && channel->global_users)
2660 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2661 SILC_NOTIFY_TYPE_LEAVE, 1,
2662 clidp->data, clidp->len);
2664 silc_buffer_free(clidp);
2667 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2669 if (channel->founder_key) {
2670 /* The founder auth data exists, do not remove the channel entry */
2671 SilcChannelClientEntry chl2;
2672 SilcHashTableList htl2;
2674 channel->disabled = TRUE;
2676 silc_hash_table_list(channel->user_list, &htl2);
2677 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2678 silc_hash_table_del(chl2->client->channels, channel);
2679 silc_hash_table_del(channel->user_list, chl2->client);
2685 /* Remove the channel entry */
2686 if (silc_idlist_del_channel(server->local_list, channel))
2687 server->stat.my_channels--;
2689 silc_idlist_del_channel(server->global_list, channel);
2693 /* Send notify to channel about client leaving the channel */
2695 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2696 SILC_NOTIFY_TYPE_LEAVE, 1,
2697 clidp->data, clidp->len);
2699 silc_buffer_free(clidp);
2703 /* Timeout callback. This is called if connection is idle or for some
2704 other reason is not responding within some period of time. This
2705 disconnects the remote end. */
2707 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2709 SilcServer server = (SilcServer)context;
2710 SilcSocketConnection sock = server->sockets[fd];
2712 SILC_LOG_DEBUG(("Start"));
2717 /* If we have protocol active we must assure that we call the protocol's
2718 final callback so that all the memory is freed. */
2719 if (sock->protocol) {
2720 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2721 silc_protocol_execute_final(sock->protocol, server->schedule);
2725 if (sock->user_data)
2726 silc_server_free_sock_user_data(server, sock);
2728 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2729 "Connection timeout");
2732 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2733 function may be used only by router. In real SILC network all channels
2734 are created by routers thus this function is never used by normal
2737 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2738 SilcServerID *router_id,
2744 SilcChannelID *channel_id;
2745 SilcChannelEntry entry;
2749 SILC_LOG_DEBUG(("Creating new channel"));
2752 cipher = SILC_DEFAULT_CIPHER;
2754 hmac = SILC_DEFAULT_HMAC;
2756 /* Allocate cipher */
2757 if (!silc_cipher_alloc(cipher, &key))
2761 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2762 silc_cipher_free(key);
2766 channel_name = strdup(channel_name);
2768 /* Create the channel */
2769 if (!silc_id_create_channel_id(server, router_id, server->rng,
2771 silc_free(channel_name);
2772 silc_cipher_free(key);
2773 silc_hmac_free(newhmac);
2776 entry = silc_idlist_add_channel(server->local_list, channel_name,
2777 SILC_CHANNEL_MODE_NONE, channel_id,
2778 NULL, key, newhmac, 0);
2780 silc_free(channel_name);
2781 silc_cipher_free(key);
2782 silc_hmac_free(newhmac);
2786 entry->cipher = strdup(cipher);
2787 entry->hmac_name = strdup(hmac);
2789 /* Now create the actual key material */
2790 if (!silc_server_create_channel_key(server, entry,
2791 silc_cipher_get_key_len(key) / 8)) {
2792 silc_free(channel_name);
2793 silc_cipher_free(key);
2794 silc_hmac_free(newhmac);
2795 silc_free(entry->cipher);
2796 silc_free(entry->hmac_name);
2800 /* Notify other routers about the new channel. We send the packet
2801 to our primary route. */
2802 if (broadcast && server->standalone == FALSE)
2803 silc_server_send_new_channel(server, server->router->connection, TRUE,
2804 channel_name, entry->id,
2805 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2808 server->stat.my_channels++;
2813 /* Same as above but creates the channel with Channel ID `channel_id. */
2816 silc_server_create_new_channel_with_id(SilcServer server,
2820 SilcChannelID *channel_id,
2823 SilcChannelEntry entry;
2827 SILC_LOG_DEBUG(("Creating new channel"));
2830 cipher = SILC_DEFAULT_CIPHER;
2832 hmac = SILC_DEFAULT_HMAC;
2834 /* Allocate cipher */
2835 if (!silc_cipher_alloc(cipher, &key))
2839 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2840 silc_cipher_free(key);
2844 channel_name = strdup(channel_name);
2846 /* Create the channel */
2847 entry = silc_idlist_add_channel(server->local_list, channel_name,
2848 SILC_CHANNEL_MODE_NONE, channel_id,
2849 NULL, key, newhmac, 0);
2851 silc_free(channel_name);
2855 /* Now create the actual key material */
2856 if (!silc_server_create_channel_key(server, entry,
2857 silc_cipher_get_key_len(key) / 8)) {
2858 silc_free(channel_name);
2862 /* Notify other routers about the new channel. We send the packet
2863 to our primary route. */
2864 if (broadcast && server->standalone == FALSE)
2865 silc_server_send_new_channel(server, server->router->connection, TRUE,
2866 channel_name, entry->id,
2867 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2870 server->stat.my_channels++;
2875 /* Channel's key re-key timeout callback. */
2877 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2879 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2880 SilcServer server = (SilcServer)rekey->context;
2884 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2887 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2890 /* Generates new channel key. This is used to create the initial channel key
2891 but also to re-generate new key for channel. If `key_len' is provided
2892 it is the bytes of the key length. */
2894 bool silc_server_create_channel_key(SilcServer server,
2895 SilcChannelEntry channel,
2899 unsigned char channel_key[32], hash[32];
2902 SILC_LOG_DEBUG(("Generating channel key"));
2904 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2905 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2909 if (!channel->channel_key)
2910 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
2911 channel->channel_key = NULL;
2917 else if (channel->key_len)
2918 len = channel->key_len / 8;
2920 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2922 /* Create channel key */
2923 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2926 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2928 /* Remove old key if exists */
2930 memset(channel->key, 0, channel->key_len / 8);
2931 silc_free(channel->key);
2935 channel->key_len = len * 8;
2936 channel->key = silc_calloc(len, sizeof(*channel->key));
2937 memcpy(channel->key, channel_key, len);
2938 memset(channel_key, 0, sizeof(channel_key));
2940 /* Generate HMAC key from the channel key data and set it */
2942 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2943 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2944 silc_hmac_set_key(channel->hmac, hash,
2945 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2946 memset(hash, 0, sizeof(hash));
2948 if (server->server_type == SILC_ROUTER) {
2949 if (!channel->rekey)
2950 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2951 channel->rekey->context = (void *)server;
2952 channel->rekey->channel = channel;
2953 channel->rekey->key_len = key_len;
2954 if (channel->rekey->task)
2955 silc_schedule_task_del(server->schedule, channel->rekey->task);
2957 channel->rekey->task =
2958 silc_schedule_task_add(server->schedule, 0,
2959 silc_server_channel_key_rekey,
2960 (void *)channel->rekey, 3600, 0,
2962 SILC_TASK_PRI_NORMAL);
2968 /* Saves the channel key found in the encoded `key_payload' buffer. This
2969 function is used when we receive Channel Key Payload and also when we're
2970 processing JOIN command reply. Returns entry to the channel. */
2972 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2973 SilcBuffer key_payload,
2974 SilcChannelEntry channel)
2976 SilcChannelKeyPayload payload = NULL;
2977 SilcChannelID *id = NULL;
2978 unsigned char *tmp, hash[32];
2982 SILC_LOG_DEBUG(("Start"));
2984 /* Decode channel key payload */
2985 payload = silc_channel_key_payload_parse(key_payload->data,
2988 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2993 /* Get the channel entry */
2996 /* Get channel ID */
2997 tmp = silc_channel_key_get_id(payload, &tmp_len);
2998 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3004 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3006 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3008 SILC_LOG_ERROR(("Received key for non-existent channel"));
3014 tmp = silc_channel_key_get_key(payload, &tmp_len);
3020 cipher = silc_channel_key_get_cipher(payload, NULL);
3026 /* Remove old key if exists */
3028 memset(channel->key, 0, channel->key_len / 8);
3029 silc_free(channel->key);
3030 silc_cipher_free(channel->channel_key);
3033 /* Create new cipher */
3034 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3035 channel->channel_key = NULL;
3040 if (channel->cipher)
3041 silc_free(channel->cipher);
3042 channel->cipher = strdup(cipher);
3045 channel->key_len = tmp_len * 8;
3046 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3047 memcpy(channel->key, tmp, tmp_len);
3048 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3050 /* Generate HMAC key from the channel key data and set it */
3052 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3053 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3054 silc_hmac_set_key(channel->hmac, hash,
3055 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3057 memset(hash, 0, sizeof(hash));
3058 memset(tmp, 0, tmp_len);
3060 if (server->server_type == SILC_ROUTER) {
3061 if (!channel->rekey)
3062 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3063 channel->rekey->context = (void *)server;
3064 channel->rekey->channel = channel;
3065 if (channel->rekey->task)
3066 silc_schedule_task_del(server->schedule, channel->rekey->task);
3068 channel->rekey->task =
3069 silc_schedule_task_add(server->schedule, 0,
3070 silc_server_channel_key_rekey,
3071 (void *)channel->rekey, 3600, 0,
3073 SILC_TASK_PRI_NORMAL);
3079 silc_channel_key_payload_free(payload);
3084 /* Heartbeat callback. This function is set as argument for the
3085 silc_socket_set_heartbeat function. The library will call this function
3086 at the set time interval. */
3088 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3091 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3093 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3096 /* Send the heartbeat */
3097 silc_server_send_heartbeat(hb->server, sock);
3100 /* Returns assembled of all servers in the given ID list. The packet's
3101 form is dictated by the New ID payload. */
3103 static void silc_server_announce_get_servers(SilcServer server,
3104 SilcServerEntry remote,
3106 SilcBuffer *servers,
3107 unsigned long creation_time)
3109 SilcIDCacheList list;
3110 SilcIDCacheEntry id_cache;
3111 SilcServerEntry entry;
3114 /* Go through all clients in the list */
3115 if (silc_idcache_get_all(id_list->servers, &list)) {
3116 if (silc_idcache_list_first(list, &id_cache)) {
3118 entry = (SilcServerEntry)id_cache->context;
3120 /* Do not announce the one we've sending our announcements and
3121 do not announce ourself. Also check the creation time if it's
3123 if ((entry == remote) || (entry == server->id_entry) ||
3124 (creation_time && entry->data.created < creation_time)) {
3125 if (!silc_idcache_list_next(list, &id_cache))
3130 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3132 *servers = silc_buffer_realloc(*servers,
3134 (*servers)->truelen + idp->len :
3136 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3137 silc_buffer_put(*servers, idp->data, idp->len);
3138 silc_buffer_pull(*servers, idp->len);
3139 silc_buffer_free(idp);
3141 if (!silc_idcache_list_next(list, &id_cache))
3146 silc_idcache_list_free(list);
3151 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3157 p = silc_notify_payload_encode(notify, argc, ap);
3163 /* This function is used by router to announce existing servers to our
3164 primary router when we've connected to it. If `creation_time' is non-zero
3165 then only the servers that has been created after the `creation_time'
3166 will be announced. */
3168 void silc_server_announce_servers(SilcServer server, bool global,
3169 unsigned long creation_time,
3170 SilcSocketConnection remote)
3172 SilcBuffer servers = NULL;
3174 SILC_LOG_DEBUG(("Announcing servers"));
3176 /* Get servers in local list */
3177 silc_server_announce_get_servers(server, remote->user_data,
3178 server->local_list, &servers,
3182 /* Get servers in global list */
3183 silc_server_announce_get_servers(server, remote->user_data,
3184 server->global_list, &servers,
3188 silc_buffer_push(servers, servers->data - servers->head);
3189 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3191 /* Send the packet */
3192 silc_server_packet_send(server, remote,
3193 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3194 servers->data, servers->len, TRUE);
3196 silc_buffer_free(servers);
3200 /* Returns assembled packet of all clients in the given ID list. The
3201 packet's form is dictated by the New ID Payload. */
3203 static void silc_server_announce_get_clients(SilcServer server,
3205 SilcBuffer *clients,
3207 unsigned long creation_time)
3209 SilcIDCacheList list;
3210 SilcIDCacheEntry id_cache;
3211 SilcClientEntry client;
3214 unsigned char mode[4];
3216 /* Go through all clients in the list */
3217 if (silc_idcache_get_all(id_list->clients, &list)) {
3218 if (silc_idcache_list_first(list, &id_cache)) {
3220 client = (SilcClientEntry)id_cache->context;
3222 if (creation_time && client->data.created < creation_time) {
3223 if (!silc_idcache_list_next(list, &id_cache))
3228 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3230 *clients = silc_buffer_realloc(*clients,
3232 (*clients)->truelen + idp->len :
3234 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3235 silc_buffer_put(*clients, idp->data, idp->len);
3236 silc_buffer_pull(*clients, idp->len);
3238 SILC_PUT32_MSB(client->mode, mode);
3239 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3240 2, idp->data, idp->len,
3242 *umodes = silc_buffer_realloc(*umodes,
3244 (*umodes)->truelen + tmp->len :
3246 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3247 silc_buffer_put(*umodes, tmp->data, tmp->len);
3248 silc_buffer_pull(*umodes, tmp->len);
3249 silc_buffer_free(tmp);
3251 silc_buffer_free(idp);
3253 if (!silc_idcache_list_next(list, &id_cache))
3258 silc_idcache_list_free(list);
3262 /* This function is used to announce our existing clients to our router
3263 when we've connected to it. If `creation_time' is non-zero then only
3264 the clients that has been created after the `creation_time' will be
3267 void silc_server_announce_clients(SilcServer server,
3268 unsigned long creation_time,
3269 SilcSocketConnection remote)
3271 SilcBuffer clients = NULL;
3272 SilcBuffer umodes = NULL;
3274 SILC_LOG_DEBUG(("Announcing clients"));
3276 /* Get clients in local list */
3277 silc_server_announce_get_clients(server, server->local_list,
3278 &clients, &umodes, creation_time);
3280 /* As router we announce our global list as well */
3281 if (server->server_type == SILC_ROUTER)
3282 silc_server_announce_get_clients(server, server->global_list,
3283 &clients, &umodes, creation_time);
3286 silc_buffer_push(clients, clients->data - clients->head);
3287 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3289 /* Send the packet */
3290 silc_server_packet_send(server, remote,
3291 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3292 clients->data, clients->len, TRUE);
3294 silc_buffer_free(clients);
3298 silc_buffer_push(umodes, umodes->data - umodes->head);
3299 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3301 /* Send the packet */
3302 silc_server_packet_send(server, remote,
3303 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3304 umodes->data, umodes->len, TRUE);
3306 silc_buffer_free(umodes);
3310 /* Returns channel's topic for announcing it */
3312 void silc_server_announce_get_channel_topic(SilcServer server,
3313 SilcChannelEntry channel,
3318 if (channel->topic) {
3319 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3320 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3321 chidp->data, chidp->len,
3323 strlen(channel->topic));
3324 silc_buffer_free(chidp);
3328 /* Returns assembled packets for channel users of the `channel'. */
3330 void silc_server_announce_get_channel_users(SilcServer server,
3331 SilcChannelEntry channel,
3332 SilcBuffer *channel_users,
3333 SilcBuffer *channel_users_modes)
3335 SilcChannelClientEntry chl;
3336 SilcHashTableList htl;
3337 SilcBuffer chidp, clidp;
3340 unsigned char mode[4];
3342 SILC_LOG_DEBUG(("Start"));
3344 /* Now find all users on the channel */
3345 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3346 silc_hash_table_list(channel->user_list, &htl);
3347 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3348 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3351 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3352 clidp->data, clidp->len,
3353 chidp->data, chidp->len);
3356 silc_buffer_realloc(*channel_users,
3358 (*channel_users)->truelen + len : len));
3359 silc_buffer_pull_tail(*channel_users,
3360 ((*channel_users)->end -
3361 (*channel_users)->data));
3363 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3364 silc_buffer_pull(*channel_users, len);
3365 silc_buffer_free(tmp);
3367 /* CUMODE notify for mode change on the channel */
3368 SILC_PUT32_MSB(chl->mode, mode);
3369 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3370 3, clidp->data, clidp->len,
3372 clidp->data, clidp->len);
3374 *channel_users_modes =
3375 silc_buffer_realloc(*channel_users_modes,
3376 (*channel_users_modes ?
3377 (*channel_users_modes)->truelen + len : len));
3378 silc_buffer_pull_tail(*channel_users_modes,
3379 ((*channel_users_modes)->end -
3380 (*channel_users_modes)->data));
3382 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3383 silc_buffer_pull(*channel_users_modes, len);
3384 silc_buffer_free(tmp);
3386 silc_buffer_free(clidp);
3388 silc_buffer_free(chidp);
3391 /* Returns assembled packets for all channels and users on those channels
3392 from the given ID List. The packets are in the form dictated by the
3393 New Channel and New Channel User payloads. */
3395 void silc_server_announce_get_channels(SilcServer server,
3397 SilcBuffer *channels,
3398 SilcBuffer *channel_users,
3399 SilcBuffer **channel_users_modes,
3400 uint32 *channel_users_modes_c,
3401 SilcBuffer **channel_topics,
3402 SilcChannelID ***channel_ids,
3403 unsigned long creation_time)
3405 SilcIDCacheList list;
3406 SilcIDCacheEntry id_cache;
3407 SilcChannelEntry channel;
3412 int i = *channel_users_modes_c;
3415 SILC_LOG_DEBUG(("Start"));
3417 /* Go through all channels in the list */
3418 if (silc_idcache_get_all(id_list->channels, &list)) {
3419 if (silc_idcache_list_first(list, &id_cache)) {
3421 channel = (SilcChannelEntry)id_cache->context;
3423 if (creation_time && channel->created < creation_time)
3428 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3429 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3430 name_len = strlen(channel->channel_name);
3433 len = 4 + name_len + id_len + 4;
3435 silc_buffer_realloc(*channels,
3436 (*channels ? (*channels)->truelen +
3438 silc_buffer_pull_tail(*channels,
3439 ((*channels)->end - (*channels)->data));
3440 silc_buffer_format(*channels,
3441 SILC_STR_UI_SHORT(name_len),
3442 SILC_STR_UI_XNSTRING(channel->channel_name,
3444 SILC_STR_UI_SHORT(id_len),
3445 SILC_STR_UI_XNSTRING(cid, id_len),
3446 SILC_STR_UI_INT(channel->mode),
3448 silc_buffer_pull(*channels, len);
3451 /* Channel user modes */
3452 *channel_users_modes = silc_realloc(*channel_users_modes,
3453 sizeof(**channel_users_modes) *
3455 (*channel_users_modes)[i] = NULL;
3456 *channel_ids = silc_realloc(*channel_ids,
3457 sizeof(**channel_ids) * (i + 1));
3458 (*channel_ids)[i] = NULL;
3459 silc_server_announce_get_channel_users(server, channel,
3461 &(*channel_users_modes)[i]);
3462 (*channel_ids)[i] = channel->id;
3464 /* Channel's topic */
3465 *channel_topics = silc_realloc(*channel_topics,
3466 sizeof(**channel_topics) * (i + 1));
3467 (*channel_topics)[i] = NULL;
3468 silc_server_announce_get_channel_topic(server, channel,
3469 &(*channel_topics)[i]);
3472 if (!silc_idcache_list_next(list, &id_cache))
3476 *channel_users_modes_c += i;
3479 silc_idcache_list_free(list);
3483 /* This function is used to announce our existing channels to our router
3484 when we've connected to it. This also announces the users on the
3485 channels to the router. If the `creation_time' is non-zero only the
3486 channels that was created after the `creation_time' are announced.
3487 Note that the channel users are still announced even if the `creation_time'
3490 void silc_server_announce_channels(SilcServer server,
3491 unsigned long creation_time,
3492 SilcSocketConnection remote)
3494 SilcBuffer channels = NULL, channel_users = NULL;
3495 SilcBuffer *channel_users_modes = NULL;
3496 SilcBuffer *channel_topics = NULL;
3497 uint32 channel_users_modes_c = 0;
3498 SilcChannelID **channel_ids = NULL;
3500 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3502 /* Get channels and channel users in local list */
3503 silc_server_announce_get_channels(server, server->local_list,
3504 &channels, &channel_users,
3505 &channel_users_modes,
3506 &channel_users_modes_c,
3508 &channel_ids, creation_time);
3510 /* Get channels and channel users in global list */
3511 if (server->server_type != SILC_SERVER)
3512 silc_server_announce_get_channels(server, server->global_list,
3513 &channels, &channel_users,
3514 &channel_users_modes,
3515 &channel_users_modes_c,
3517 &channel_ids, creation_time);
3520 silc_buffer_push(channels, channels->data - channels->head);
3521 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3523 /* Send the packet */
3524 silc_server_packet_send(server, remote,
3525 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3526 channels->data, channels->len,
3529 silc_buffer_free(channels);
3532 if (channel_users) {
3533 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3534 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3535 channel_users->len);
3537 /* Send the packet */
3538 silc_server_packet_send(server, remote,
3539 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3540 channel_users->data, channel_users->len,
3543 silc_buffer_free(channel_users);
3546 if (channel_users_modes) {
3549 for (i = 0; i < channel_users_modes_c; i++) {
3550 silc_buffer_push(channel_users_modes[i],
3551 channel_users_modes[i]->data -
3552 channel_users_modes[i]->head);
3553 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3554 channel_users_modes[i]->len);
3555 silc_server_packet_send_dest(server, remote,
3556 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3557 channel_ids[i], SILC_ID_CHANNEL,
3558 channel_users_modes[i]->data,
3559 channel_users_modes[i]->len,
3561 silc_buffer_free(channel_users_modes[i]);
3563 silc_free(channel_users_modes);
3566 if (channel_topics) {
3569 for (i = 0; i < channel_users_modes_c; i++) {
3570 if (!channel_topics[i])
3573 silc_buffer_push(channel_topics[i],
3574 channel_topics[i]->data -
3575 channel_topics[i]->head);
3576 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3577 channel_topics[i]->len);
3578 silc_server_packet_send_dest(server, remote,
3579 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3580 channel_ids[i], SILC_ID_CHANNEL,
3581 channel_topics[i]->data,
3582 channel_topics[i]->len,
3584 silc_buffer_free(channel_topics[i]);
3586 silc_free(channel_topics);
3589 silc_free(channel_ids);
3592 /* Failure timeout callback. If this is called then we will immediately
3593 process the received failure. We always process the failure with timeout
3594 since we do not want to blindly trust to received failure packets.
3595 This won't be called (the timeout is cancelled) if the failure was
3596 bogus (it is bogus if remote does not close the connection after sending
3599 SILC_TASK_CALLBACK(silc_server_failure_callback)
3601 SilcServerFailureContext f = (SilcServerFailureContext)context;
3603 if (f->sock->protocol) {
3604 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3605 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3611 /* Assembles user list and users mode list from the `channel'. */
3613 void silc_server_get_users_on_channel(SilcServer server,
3614 SilcChannelEntry channel,
3615 SilcBuffer *user_list,
3616 SilcBuffer *mode_list,
3619 SilcChannelClientEntry chl;
3620 SilcHashTableList htl;
3621 SilcBuffer client_id_list;
3622 SilcBuffer client_mode_list;
3624 uint32 list_count = 0, len = 0;
3626 silc_hash_table_list(channel->user_list, &htl);
3627 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3628 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3630 client_id_list = silc_buffer_alloc(len);
3632 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3633 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3634 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3636 silc_hash_table_list(channel->user_list, &htl);
3637 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3639 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3640 silc_buffer_put(client_id_list, idp->data, idp->len);
3641 silc_buffer_pull(client_id_list, idp->len);
3642 silc_buffer_free(idp);
3644 /* Client's mode on channel */
3645 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3646 silc_buffer_pull(client_mode_list, 4);
3650 silc_buffer_push(client_id_list,
3651 client_id_list->data - client_id_list->head);
3652 silc_buffer_push(client_mode_list,
3653 client_mode_list->data - client_mode_list->head);
3655 *user_list = client_id_list;
3656 *mode_list = client_mode_list;
3657 *user_count = list_count;
3660 /* Saves users and their modes to the `channel'. */
3662 void silc_server_save_users_on_channel(SilcServer server,
3663 SilcSocketConnection sock,
3664 SilcChannelEntry channel,
3665 SilcClientID *noadd,
3666 SilcBuffer user_list,
3667 SilcBuffer mode_list,
3673 SilcClientID *client_id;
3674 SilcClientEntry client;
3675 SilcIDCacheEntry cache;
3678 for (i = 0; i < user_count; i++) {
3680 SILC_GET16_MSB(idp_len, user_list->data + 2);
3682 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3683 silc_buffer_pull(user_list, idp_len);
3688 SILC_GET32_MSB(mode, mode_list->data);
3689 silc_buffer_pull(mode_list, 4);
3691 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3692 silc_free(client_id);
3698 /* Check if we have this client cached already. */
3699 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3700 server->server_type, &cache);
3702 client = silc_idlist_find_client_by_id(server->global_list,
3703 client_id, server->server_type,
3708 /* If router did not find such Client ID in its lists then this must
3709 be bogus client or some router in the net is buggy. */
3710 if (server->server_type == SILC_ROUTER) {
3711 silc_free(client_id);
3715 /* We don't have that client anywhere, add it. The client is added
3716 to global list since server didn't have it in the lists so it must be
3718 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3719 silc_id_dup(client_id, SILC_ID_CLIENT),
3720 sock->user_data, NULL, 0);
3722 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3723 silc_free(client_id);
3727 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3729 /* Found, if it is from global list we'll assure that we won't
3730 expire it now that the entry is on channel. */
3735 silc_free(client_id);
3737 if (!silc_server_client_on_channel(client, channel)) {
3738 /* Client was not on the channel, add it. */
3739 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3740 chl->client = client;
3742 chl->channel = channel;
3743 silc_hash_table_add(channel->user_list, chl->client, chl);
3744 silc_hash_table_add(client->channels, chl->channel, chl);
3749 /* Lookups route to the client indicated by the `id_data'. The connection
3750 object and internal data object is returned. Returns NULL if route
3751 could not be found to the client. If the `client_id' is specified then
3752 it is used and the `id_data' is ignored. */
3754 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3755 unsigned char *id_data,
3757 SilcClientID *client_id,
3758 SilcIDListData *idata)
3761 SilcClientEntry client;
3763 SILC_LOG_DEBUG(("Start"));
3765 /* Decode destination Client ID */
3767 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3769 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3773 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3776 /* If the destination belongs to our server we don't have to route
3777 the packet anywhere but to send it to the local destination. */
3778 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3782 /* If we are router and the client has router then the client is in
3783 our cell but not directly connected to us. */
3784 if (server->server_type == SILC_ROUTER && client->router) {
3785 /* We are of course in this case the client's router thus the route
3786 to the client is the server who owns the client. So, we will send
3787 the packet to that server. */
3789 *idata = (SilcIDListData)client->router;
3790 return client->router->connection;
3793 /* Seems that client really is directly connected to us */
3795 *idata = (SilcIDListData)client;
3796 return client->connection;
3799 /* Destination belongs to someone not in this server. If we are normal
3800 server our action is to send the packet to our router. */
3801 if (server->server_type != SILC_ROUTER && !server->standalone) {
3804 *idata = (SilcIDListData)server->router;
3805 return server->router->connection;
3808 /* We are router and we will perform route lookup for the destination
3809 and send the packet to fastest route. */
3810 if (server->server_type == SILC_ROUTER && !server->standalone) {
3811 /* Check first that the ID is valid */
3812 client = silc_idlist_find_client_by_id(server->global_list, id,
3815 SilcSocketConnection dst_sock;
3817 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3821 *idata = (SilcIDListData)dst_sock->user_data;
3830 /* Encodes and returns channel list of channels the `client' has joined.
3831 Secret channels are not put to the list. */
3833 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3834 SilcClientEntry client)
3836 SilcBuffer buffer = NULL;
3837 SilcChannelEntry channel;
3838 SilcChannelClientEntry chl;
3839 SilcHashTableList htl;
3845 silc_hash_table_list(client->channels, &htl);
3846 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3847 channel = chl->channel;
3849 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3850 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3853 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3854 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3855 name_len = strlen(channel->channel_name);
3857 len = 4 + name_len + id_len + 4;
3858 buffer = silc_buffer_realloc(buffer,
3859 (buffer ? (buffer)->truelen + len : len));
3860 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3861 silc_buffer_format(buffer,
3862 SILC_STR_UI_SHORT(name_len),
3863 SILC_STR_UI_XNSTRING(channel->channel_name,
3865 SILC_STR_UI_SHORT(id_len),
3866 SILC_STR_UI_XNSTRING(cid, id_len),
3867 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3869 silc_buffer_pull(buffer, len);
3874 silc_buffer_push(buffer, buffer->data - buffer->head);
3879 /* Finds client entry by Client ID and if it is not found then resolves
3880 it using WHOIS command. */
3882 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3883 SilcClientID *client_id)
3885 SilcClientEntry client;
3887 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3890 client = silc_idlist_find_client_by_id(server->global_list,
3891 client_id, TRUE, NULL);
3892 if (!client && server->server_type == SILC_ROUTER)
3896 if (!client && server->standalone)
3899 if (!client || !client->nickname || !client->username) {
3900 SilcBuffer buffer, idp;
3902 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3903 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3904 client->resolve_cmd_ident = ++server->cmd_ident;
3906 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3907 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3908 server->cmd_ident, 1,
3909 3, idp->data, idp->len);
3910 silc_server_packet_send(server, client ? client->router->connection :
3911 server->router->connection,
3912 SILC_PACKET_COMMAND, 0,
3913 buffer->data, buffer->len, FALSE);
3914 silc_buffer_free(idp);
3915 silc_buffer_free(buffer);
3922 /* A timeout callback for the re-key. We will be the initiator of the
3925 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3927 SilcSocketConnection sock = (SilcSocketConnection)context;
3928 SilcIDListData idata = (SilcIDListData)sock->user_data;
3929 SilcServer server = (SilcServer)idata->rekey->context;
3930 SilcProtocol protocol;
3931 SilcServerRekeyInternalContext *proto_ctx;
3933 SILC_LOG_DEBUG(("Start"));
3935 /* Allocate internal protocol context. This is sent as context
3937 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3938 proto_ctx->server = (void *)server;
3939 proto_ctx->sock = sock;
3940 proto_ctx->responder = FALSE;
3941 proto_ctx->pfs = idata->rekey->pfs;
3943 /* Perform rekey protocol. Will call the final callback after the
3944 protocol is over. */
3945 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3946 &protocol, proto_ctx, silc_server_rekey_final);
3947 sock->protocol = protocol;
3949 /* Run the protocol */
3950 silc_protocol_execute(protocol, server->schedule, 0, 0);
3952 /* Re-register re-key timeout */
3953 silc_schedule_task_add(server->schedule, sock->sock,
3954 silc_server_rekey_callback,
3955 context, idata->rekey->timeout, 0,
3956 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3959 /* The final callback for the REKEY protocol. This will actually take the
3960 new key material into use. */
3962 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3964 SilcProtocol protocol = (SilcProtocol)context;
3965 SilcServerRekeyInternalContext *ctx =
3966 (SilcServerRekeyInternalContext *)protocol->context;
3967 SilcServer server = (SilcServer)ctx->server;
3968 SilcSocketConnection sock = ctx->sock;
3970 SILC_LOG_DEBUG(("Start"));
3972 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3973 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3974 /* Error occured during protocol */
3975 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
3976 silc_protocol_cancel(protocol, server->schedule);
3977 silc_protocol_free(protocol);
3978 sock->protocol = NULL;
3980 silc_packet_context_free(ctx->packet);
3982 silc_ske_free(ctx->ske);
3987 /* Purge the outgoing data queue to assure that all rekey packets really
3988 go to the network before we quit the protocol. */
3989 silc_server_packet_queue_purge(server, sock);
3992 silc_protocol_free(protocol);
3993 sock->protocol = NULL;
3995 silc_packet_context_free(ctx->packet);
3997 silc_ske_free(ctx->ske);