5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
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 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* XXX After server is made as Silc Server Library this can be given
124 as argument, for now this is hard coded */
125 server->params = silc_calloc(1, sizeof(*server->params));
126 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
127 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
128 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
129 server->params->retry_keep_trying = FALSE;
130 server->params->protocol_timeout = 60;
131 server->params->require_reverse_mapping = FALSE;
133 /* Set log files where log message should be saved. */
134 server->config->server = server;
135 silc_server_config_setlogfiles(server->config);
137 /* Register all configured ciphers, PKCS and hash functions. */
138 silc_server_config_register_ciphers(server->config);
139 silc_server_config_register_pkcs(server->config);
140 silc_server_config_register_hashfuncs(server->config);
141 silc_server_config_register_hmacs(server->config);
143 /* Initialize random number generator for the server. */
144 server->rng = silc_rng_alloc();
145 silc_rng_init(server->rng);
146 silc_rng_global_init(server->rng);
148 /* Initialize hash functions for server to use */
149 silc_hash_alloc("md5", &server->md5hash);
150 silc_hash_alloc("sha1", &server->sha1hash);
152 /* Initialize none cipher */
153 silc_cipher_alloc("none", &server->none_cipher);
155 /* XXXXX Generate RSA key pair */
157 unsigned char *public_key;
158 unsigned char *private_key;
159 uint32 pk_len, prv_len;
162 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
164 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
165 SILC_LOG_ERROR(("Could not create RSA key pair"));
169 if (server->pkcs->pkcs->init(server->pkcs->context,
170 1024, server->rng) == FALSE) {
171 SILC_LOG_ERROR(("Could not generate RSA key pair"));
175 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
177 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
180 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
181 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
184 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
186 server->private_key =
187 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
190 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
192 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
195 memset(public_key, 0, pk_len);
196 memset(private_key, 0, prv_len);
197 silc_free(public_key);
198 silc_free(private_key);
200 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
202 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
207 /* Create a listening server. Note that our server can listen on
208 multiple ports. All listeners are created here and now. */
209 /* XXX Still check this whether to use server_info or listen_port. */
211 while(server->config->listen_port) {
214 tmp = silc_net_create_server(server->config->listen_port->port,
215 server->config->listen_port->host);
219 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
220 sock[sock_count] = tmp;
221 server->config->listen_port = server->config->listen_port->next;
225 /* Initialize ID caches */
226 server->local_list->clients =
227 silc_idcache_alloc(0, silc_idlist_client_destructor);
228 server->local_list->servers = silc_idcache_alloc(0, NULL);
229 server->local_list->channels = silc_idcache_alloc(0, NULL);
231 /* These are allocated for normal server as well as these hold some
232 global information that the server has fetched from its router. For
233 router these are used as they are supposed to be used on router. */
234 server->global_list->clients =
235 silc_idcache_alloc(0, silc_idlist_client_destructor);
236 server->global_list->servers = silc_idcache_alloc(0, NULL);
237 server->global_list->channels = silc_idcache_alloc(0, NULL);
239 /* Allocate the entire socket list that is used in server. Eventually
240 all connections will have entry in this table (it is a table of
241 pointers to the actual object that is allocated individually
243 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
244 sizeof(*server->sockets));
246 for (i = 0; i < sock_count; i++) {
247 SilcSocketConnection newsocket = NULL;
249 /* Set socket to non-blocking mode */
250 silc_net_set_socket_nonblock(sock[i]);
251 server->sock = sock[i];
253 /* Create a Server ID for the server. */
254 silc_id_create_server_id(sock[i], server->rng, &id);
260 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
261 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
262 server->id_type = SILC_ID_SERVER;
263 server->server_name = server->config->server_info->server_name;
265 /* Add ourselves to the server list. We don't have a router yet
266 beacuse we haven't established a route yet. It will be done later.
267 For now, NULL is sent as router. This allocates new entry to
270 silc_idlist_add_server(server->local_list,
271 server->config->server_info->server_name,
272 server->server_type, server->id, NULL, NULL);
274 SILC_LOG_ERROR(("Could not add ourselves to cache"));
278 /* Add ourselves also to the socket table. The entry allocated above
279 is sent as argument for fast referencing in the future. */
280 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
283 server->sockets[sock[i]] = newsocket;
285 /* Put the allocated socket pointer also to the entry allocated above
286 for fast back-referencing to the socket list. */
287 id_entry->connection = (void *)server->sockets[sock[i]];
288 server->id_entry = id_entry;
291 /* Register the task queues. In SILC we have by default three task queues.
292 One task queue for non-timeout tasks which perform different kind of
293 I/O on file descriptors, timeout task queue for timeout tasks, and,
294 generic non-timeout task queue whose tasks apply to all connections. */
295 silc_task_queue_alloc(&server->io_queue, TRUE);
296 if (!server->io_queue) {
299 silc_task_queue_alloc(&server->timeout_queue, TRUE);
300 if (!server->timeout_queue) {
303 silc_task_queue_alloc(&server->generic_queue, TRUE);
304 if (!server->generic_queue) {
308 /* Register protocols */
309 silc_server_protocols_register();
311 /* Initialize the scheduler */
312 silc_schedule_init(&server->io_queue, &server->timeout_queue,
313 &server->generic_queue,
314 SILC_SERVER_MAX_CONNECTIONS);
316 /* Add the first task to the queue. This is task that is executed by
317 timeout. It expires as soon as the caller calls silc_server_run. This
318 task performs authentication protocol and key exchange with our
320 silc_task_register(server->timeout_queue, sock[0],
321 silc_server_connect_to_router,
322 (void *)server, 0, 1,
324 SILC_TASK_PRI_NORMAL);
326 /* Add listener task to the queue. This task receives new connections to the
327 server. This task remains on the queue until the end of the program. */
328 silc_task_register(server->io_queue, sock[0],
329 silc_server_accept_new_connection,
330 (void *)server, 0, 0,
332 SILC_TASK_PRI_NORMAL);
333 server->listenning = TRUE;
335 /* If server connections has been configured then we must be router as
336 normal server cannot have server connections, only router connections. */
337 if (server->config->servers)
338 server->server_type = SILC_ROUTER;
340 /* Register the ID Cache purge task. This periodically purges the ID cache
341 and removes the expired cache entries. */
343 /* Clients local list */
344 purge = silc_calloc(1, sizeof(*purge));
345 purge->cache = server->local_list->clients;
346 purge->timeout_queue = server->timeout_queue;
347 silc_task_register(purge->timeout_queue, 0,
349 (void *)purge, 600, 0,
350 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
352 /* Clients global list */
353 purge = silc_calloc(1, sizeof(*purge));
354 purge->cache = server->global_list->clients;
355 purge->timeout_queue = server->timeout_queue;
356 silc_task_register(purge->timeout_queue, 0,
358 (void *)purge, 300, 0,
359 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
361 SILC_LOG_DEBUG(("Server initialized"));
363 /* We are done here, return succesfully */
366 silc_task_queue_free(server->timeout_queue);
368 silc_task_queue_free(server->io_queue);
370 for (i = 0; i < sock_count; i++)
371 silc_net_close_server(sock[i]);
376 /* Fork server to background and set gid+uid to non-root.
377 Silcd will not run as root, so trying to set either user or group to
378 root will cause silcd to exit. */
380 void silc_server_daemonise(SilcServer server)
382 /* Are we executing silcd as root or a regular user? */
389 if (!server->config->identity || !server->config->identity->user ||
390 !server->config->identity->group) {
391 fprintf(stderr, "Error:"
392 "\tSILC server must not be run as root. For the security of your\n"
393 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
394 "\tuser account. Modify the [Identity] configuration section to run\n"
395 "\tthe server as non-root user.\n");
399 /* Get the values given for user and group in configuration file */
400 user=server->config->identity->user;
401 group=server->config->identity->group;
403 /* Check whether the user/group information is text */
404 if (atoi(user)!=0 || atoi(group)!=0) {
405 SILC_LOG_DEBUG(("Invalid user and/or group information"));
406 SILC_LOG_DEBUG(("User and/or group given as number"));
407 fprintf(stderr, "Invalid user and/or group information\n");
408 fprintf(stderr, "Please assign them as names, not numbers\n");
412 /* Catch the nasty incident of string "0" returning 0 from atoi */
413 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
414 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
415 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
423 fprintf(stderr, "No such user %s found\n", user);
428 fprintf(stderr, "No such group %s found\n", group);
432 /* Check whether user and/or group is set to root. If yes, exit
433 immediately. Otherwise, setgid and setuid server to user.group */
434 if (gr->gr_gid==0 || pw->pw_uid==0) {
435 fprintf(stderr, "Error:"
436 "\tSILC server must not be run as root. For the security of your\n"
437 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
438 "\tuser account. Modify the [Identity] configuration section to run\n"
439 "\tthe server as non-root user.\n");
442 /* Fork server to background, making it a daemon */
444 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
445 SILC_LOG_DEBUG(("Forking SILC server to background"));
450 SILC_LOG_DEBUG(("Changing to group %s", group));
451 if(setgid(gr->gr_gid)==0) {
452 SILC_LOG_DEBUG(("Setgid to %s", group));
454 SILC_LOG_DEBUG(("Setgid to %s failed", group));
455 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
459 SILC_LOG_DEBUG(("Changing to user nobody"));
460 if(setuid(pw->pw_uid)==0) {
461 SILC_LOG_DEBUG(("Setuid to %s", user));
463 SILC_LOG_DEBUG(("Setuid to %s failed", user));
464 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
470 /* Fork server to background, making it a daemon */
472 SILC_LOG_DEBUG(("Server started as user"));
473 SILC_LOG_DEBUG(("Forking SILC server to background"));
480 /* Stops the SILC server. This function is used to shutdown the server.
481 This is usually called after the scheduler has returned. After stopping
482 the server one should call silc_server_free. */
484 void silc_server_stop(SilcServer server)
486 SILC_LOG_DEBUG(("Stopping server"));
488 /* Stop the scheduler, although it might be already stopped. This
489 doesn't hurt anyone. This removes all the tasks and task queues,
491 silc_schedule_stop();
492 silc_schedule_uninit();
494 silc_server_protocols_unregister();
496 SILC_LOG_DEBUG(("Server stopped"));
499 /* The heart of the server. This runs the scheduler thus runs the server.
500 When this returns the server has been stopped and the program will
503 void silc_server_run(SilcServer server)
505 SILC_LOG_DEBUG(("Running server"));
507 /* Start the scheduler, the heart of the SILC server. When this returns
508 the program will be terminated. */
512 /* Timeout callback that will be called to retry connecting to remote
513 router. This is used by both normal and router server. This will wait
514 before retrying the connecting. The timeout is generated by exponential
515 backoff algorithm. */
517 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
519 SilcServerConnection sconn = (SilcServerConnection)context;
520 SilcServer server = sconn->server;
522 SILC_LOG_INFO(("Retrying connecting to a router"));
524 /* Calculate next timeout */
525 if (sconn->retry_count >= 1) {
526 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
527 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
528 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
530 sconn->retry_timeout = server->params->retry_interval_min;
532 sconn->retry_count++;
533 sconn->retry_timeout = sconn->retry_timeout +
534 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
536 /* If we've reached max retry count, give up. */
537 if (sconn->retry_count > server->params->retry_count &&
538 server->params->retry_keep_trying == FALSE) {
539 SILC_LOG_ERROR(("Could not connect to router, giving up"));
543 /* Wait one before retrying */
544 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
545 context, sconn->retry_timeout,
546 server->params->retry_interval_min_usec,
547 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
550 /* Generic routine to use connect to a router. */
552 SILC_TASK_CALLBACK(silc_server_connect_router)
554 SilcServerConnection sconn = (SilcServerConnection)context;
555 SilcServer server = sconn->server;
556 SilcSocketConnection newsocket;
557 SilcProtocol protocol;
558 SilcServerKEInternalContext *proto_ctx;
561 /* Connect to remote host */
562 sock = silc_net_create_connection(sconn->remote_port,
565 SILC_LOG_ERROR(("Could not connect to router"));
566 silc_task_register(server->timeout_queue, fd,
567 silc_server_connect_to_router_retry,
568 context, 0, 1, SILC_TASK_TIMEOUT,
569 SILC_TASK_PRI_NORMAL);
573 /* Set socket options */
574 silc_net_set_socket_nonblock(sock);
575 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
577 /* Create socket connection for the connection. Even though we
578 know that we are connecting to a router we will mark the socket
579 to be unknown connection until we have executed authentication
581 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
582 server->sockets[sock] = newsocket;
583 newsocket->hostname = strdup(sconn->remote_host);
584 newsocket->ip = strdup(sconn->remote_host);
585 newsocket->port = sconn->remote_port;
586 sconn->sock = newsocket;
588 /* Allocate internal protocol context. This is sent as context
590 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
591 proto_ctx->server = (void *)server;
592 proto_ctx->context = (void *)sconn;
593 proto_ctx->sock = newsocket;
594 proto_ctx->rng = server->rng;
595 proto_ctx->responder = FALSE;
597 /* Perform key exchange protocol. silc_server_connect_to_router_second
598 will be called after the protocol is finished. */
599 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
600 &protocol, proto_ctx,
601 silc_server_connect_to_router_second);
602 newsocket->protocol = protocol;
604 /* Register a timeout task that will be executed if the protocol
605 is not executed within set limit. */
606 proto_ctx->timeout_task =
607 silc_task_register(server->timeout_queue, sock,
608 silc_server_timeout_remote,
609 server, server->params->protocol_timeout,
610 server->params->protocol_timeout_usec,
614 /* Register the connection for network input and output. This sets
615 that scheduler will listen for incoming packets for this connection
616 and sets that outgoing packets may be sent to this connection as
617 well. However, this doesn't set the scheduler for outgoing traffic,
618 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
619 later when outgoing data is available. */
620 context = (void *)server;
621 SILC_REGISTER_CONNECTION_FOR_IO(sock);
623 /* Run the protocol */
624 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
627 /* This function connects to our primary router or if we are a router this
628 establishes all our primary routes. This is called at the start of the
629 server to do authentication and key exchange with our router - called
632 SILC_TASK_CALLBACK(silc_server_connect_to_router)
634 SilcServer server = (SilcServer)context;
635 SilcServerConnection sconn;
637 SILC_LOG_DEBUG(("Connecting to router(s)"));
639 /* If we are normal SILC server we need to connect to our cell's
641 if (server->server_type == SILC_SERVER) {
642 SILC_LOG_DEBUG(("We are normal server"));
644 /* Create connection to the router, if configured. */
645 if (server->config->routers) {
647 /* Allocate connection object for hold connection specific stuff. */
648 sconn = silc_calloc(1, sizeof(*sconn));
649 sconn->server = server;
650 sconn->remote_host = strdup(server->config->routers->host);
651 sconn->remote_port = server->config->routers->port;
653 silc_task_register(server->timeout_queue, fd,
654 silc_server_connect_router,
655 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
656 SILC_TASK_PRI_NORMAL);
661 /* If we are a SILC router we need to establish all of our primary
663 if (server->server_type == SILC_ROUTER) {
664 SilcServerConfigSectionServerConnection *ptr;
666 SILC_LOG_DEBUG(("We are router"));
668 /* Create the connections to all our routes */
669 ptr = server->config->routers;
672 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
673 ptr->initiator ? "Initiator" : "Responder",
674 ptr->host, ptr->port));
676 if (ptr->initiator) {
677 /* Allocate connection object for hold connection specific stuff. */
678 sconn = silc_calloc(1, sizeof(*sconn));
679 sconn->server = server;
680 sconn->remote_host = strdup(ptr->host);
681 sconn->remote_port = ptr->port;
683 silc_task_register(server->timeout_queue, fd,
684 silc_server_connect_router,
685 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
686 SILC_TASK_PRI_NORMAL);
696 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
698 /* There wasn't a configured router, we will continue but we don't
699 have a connection to outside world. We will be standalone server. */
700 server->standalone = TRUE;
703 /* Second part of connecting to router(s). Key exchange protocol has been
704 executed and now we will execute authentication protocol. */
706 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
708 SilcProtocol protocol = (SilcProtocol)context;
709 SilcServerKEInternalContext *ctx =
710 (SilcServerKEInternalContext *)protocol->context;
711 SilcServer server = (SilcServer)ctx->server;
712 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
713 SilcSocketConnection sock = server->sockets[fd];
714 SilcServerConnAuthInternalContext *proto_ctx;
715 SilcServerConfigSectionServerConnection *conn = NULL;
717 SILC_LOG_DEBUG(("Start"));
719 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
720 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
721 /* Error occured during protocol */
722 silc_protocol_free(protocol);
723 sock->protocol = NULL;
724 silc_ske_free_key_material(ctx->keymat);
726 silc_packet_context_free(ctx->packet);
728 silc_ske_free(ctx->ske);
730 silc_free(ctx->dest_id);
732 silc_task_unregister_by_callback(server->timeout_queue,
733 silc_server_failure_callback);
734 silc_server_disconnect_remote(server, sock, "Server closed connection: "
735 "Key exchange failed");
739 /* We now have the key material as the result of the key exchange
740 protocol. Take the key material into use. Free the raw key material
741 as soon as we've set them into use. */
742 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
743 ctx->ske->prop->cipher,
744 ctx->ske->prop->pkcs,
745 ctx->ske->prop->hash,
746 ctx->ske->prop->hmac,
748 silc_protocol_free(protocol);
749 sock->protocol = NULL;
750 silc_ske_free_key_material(ctx->keymat);
752 silc_packet_context_free(ctx->packet);
754 silc_ske_free(ctx->ske);
756 silc_free(ctx->dest_id);
758 silc_task_unregister_by_callback(server->timeout_queue,
759 silc_server_failure_callback);
760 silc_server_disconnect_remote(server, sock, "Server closed connection: "
761 "Key exchange failed");
764 silc_ske_free_key_material(ctx->keymat);
766 /* Allocate internal context for the authentication protocol. This
767 is sent as context for the protocol. */
768 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
769 proto_ctx->server = (void *)server;
770 proto_ctx->context = (void *)sconn;
771 proto_ctx->sock = sock;
772 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
773 proto_ctx->dest_id_type = ctx->dest_id_type;
774 proto_ctx->dest_id = ctx->dest_id;
776 /* Resolve the authentication method used in this connection. Check if
777 we find a match from user configured connections */
778 conn = silc_server_config_find_router_conn(server->config,
782 /* Match found. Use the configured authentication method */
783 proto_ctx->auth_meth = conn->auth_meth;
784 if (conn->auth_data) {
785 proto_ctx->auth_data = strdup(conn->auth_data);
786 proto_ctx->auth_data_len = strlen(conn->auth_data);
789 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
790 sock->hostname, sock->ip, sock->port));
791 silc_protocol_free(protocol);
792 sock->protocol = NULL;
794 silc_packet_context_free(ctx->packet);
796 silc_ske_free(ctx->ske);
798 silc_free(ctx->dest_id);
800 silc_task_unregister_by_callback(server->timeout_queue,
801 silc_server_failure_callback);
802 silc_server_disconnect_remote(server, sock, "Server closed connection: "
803 "Key exchange failed");
807 /* Free old protocol as it is finished now */
808 silc_protocol_free(protocol);
810 silc_packet_context_free(ctx->packet);
812 sock->protocol = NULL;
814 /* Allocate the authentication protocol. This is allocated here
815 but we won't start it yet. We will be receiving party of this
816 protocol thus we will wait that connecting party will make
818 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
819 &sock->protocol, proto_ctx,
820 silc_server_connect_to_router_final);
822 /* Register timeout task. If the protocol is not executed inside
823 this timelimit the connection will be terminated. Currently
824 this is 15 seconds and is hard coded limit (XXX). */
825 proto_ctx->timeout_task =
826 silc_task_register(server->timeout_queue, sock->sock,
827 silc_server_timeout_remote,
828 (void *)server, 15, 0,
832 /* Run the protocol */
833 sock->protocol->execute(server->timeout_queue, 0,
834 sock->protocol, sock->sock, 0, 0);
837 /* Finalizes the connection to router. Registers a server task to the
838 queue so that we can accept new connections. */
840 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
842 SilcProtocol protocol = (SilcProtocol)context;
843 SilcServerConnAuthInternalContext *ctx =
844 (SilcServerConnAuthInternalContext *)protocol->context;
845 SilcServer server = (SilcServer)ctx->server;
846 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
847 SilcSocketConnection sock = ctx->sock;
848 SilcServerEntry id_entry;
850 SilcServerHBContext hb_context;
851 SilcServerRekeyContext rekey;
852 unsigned char *id_string;
854 SILC_LOG_DEBUG(("Start"));
856 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
857 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
858 /* Error occured during protocol */
860 silc_free(ctx->dest_id);
861 silc_server_disconnect_remote(server, sock, "Server closed connection: "
862 "Authentication failed");
866 /* Add a task to the queue. This task receives new connections to the
867 server. This task remains on the queue until the end of the program. */
868 if (!server->listenning) {
869 silc_task_register(server->io_queue, server->sock,
870 silc_server_accept_new_connection,
871 (void *)server, 0, 0,
873 SILC_TASK_PRI_NORMAL);
874 server->listenning = TRUE;
877 /* Send NEW_SERVER packet to the router. We will become registered
878 to the SILC network after sending this packet. */
879 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
880 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
881 strlen(server->server_name));
882 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
883 silc_buffer_format(packet,
884 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
885 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
886 SILC_STR_UI_SHORT(strlen(server->server_name)),
887 SILC_STR_UI_XNSTRING(server->server_name,
888 strlen(server->server_name)),
891 /* Send the packet */
892 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
893 packet->data, packet->len, TRUE);
894 silc_buffer_free(packet);
895 silc_free(id_string);
897 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
899 /* Add the connected router to local server list */
900 server->standalone = FALSE;
901 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
902 SILC_ROUTER, ctx->dest_id, NULL, sock);
905 silc_free(ctx->dest_id);
906 silc_server_disconnect_remote(server, sock, "Server closed connection: "
907 "Authentication failed");
911 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
912 silc_free(sock->user_data);
913 sock->user_data = (void *)id_entry;
914 sock->type = SILC_SOCKET_TYPE_ROUTER;
915 server->id_entry->router = id_entry;
916 server->router = id_entry;
917 server->router->data.registered = TRUE;
919 /* Perform keepalive. The `hb_context' will be freed automatically
920 when finally calling the silc_socket_free function. XXX hardcoded
922 hb_context = silc_calloc(1, sizeof(*hb_context));
923 hb_context->server = server;
924 silc_socket_set_heartbeat(sock, 600, hb_context,
925 silc_server_perform_heartbeat,
926 server->timeout_queue);
928 /* Registed re-key timeout */
929 rekey = silc_calloc(1, sizeof(*rekey));
930 rekey->server = server;
932 rekey->timeout = 3600; /* XXX hardcoded */
933 silc_task_register(server->timeout_queue, sock->sock,
934 silc_server_rekey_callback,
935 (void *)rekey, rekey->timeout, 0,
936 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
938 /* If we are router then announce our possible servers. */
939 if (server->server_type == SILC_ROUTER)
940 silc_server_announce_servers(server);
942 /* Announce our clients and channels to the router */
943 silc_server_announce_clients(server);
944 silc_server_announce_channels(server);
947 /* Free the temporary connection data context */
949 silc_free(sconn->remote_host);
953 /* Free the protocol object */
954 silc_protocol_free(protocol);
956 silc_packet_context_free(ctx->packet);
958 silc_ske_free(ctx->ske);
960 sock->protocol = NULL;
963 /* Accepts new connections to the server. Accepting new connections are
964 done in three parts to make it async. */
966 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
968 SilcServer server = (SilcServer)context;
969 SilcSocketConnection newsocket;
970 SilcServerKEInternalContext *proto_ctx;
973 SILC_LOG_DEBUG(("Accepting new connection"));
975 server->stat.conn_attempts++;
977 sock = silc_net_accept_connection(server->sock);
979 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
980 server->stat.conn_failures++;
984 /* Check max connections */
985 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
986 SILC_LOG_ERROR(("Refusing connection, server is full"));
987 server->stat.conn_failures++;
991 /* Set socket options */
992 silc_net_set_socket_nonblock(sock);
993 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
995 /* We don't create a ID yet, since we don't know what type of connection
996 this is yet. But, we do add the connection to the socket table. */
997 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
998 server->sockets[sock] = newsocket;
1000 /* XXX This MUST be done async as this will block the entire server
1001 process. Either we have to do our own resolver stuff or in the future
1002 we can use threads. */
1003 /* Perform name and address lookups for the remote host. */
1004 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
1005 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
1007 SILC_LOG_ERROR(("IP/DNS lookup failed"));
1008 server->stat.conn_failures++;
1011 if (!newsocket->hostname)
1012 newsocket->hostname = strdup(newsocket->ip);
1013 newsocket->port = silc_net_get_remote_port(sock);
1015 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1018 /* Allocate internal context for key exchange protocol. This is
1019 sent as context for the protocol. */
1020 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1021 proto_ctx->server = context;
1022 proto_ctx->sock = newsocket;
1023 proto_ctx->rng = server->rng;
1024 proto_ctx->responder = TRUE;
1026 /* Prepare the connection for key exchange protocol. We allocate the
1027 protocol but will not start it yet. The connector will be the
1028 initiator of the protocol thus we will wait for initiation from
1029 there before we start the protocol. */
1030 server->stat.auth_attempts++;
1031 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1032 &newsocket->protocol, proto_ctx,
1033 silc_server_accept_new_connection_second);
1035 /* Register a timeout task that will be executed if the connector
1036 will not start the key exchange protocol within 60 seconds. For
1037 now, this is a hard coded limit. After 60 secs the connection will
1038 be closed if the key exchange protocol has not been started. */
1039 proto_ctx->timeout_task =
1040 silc_task_register(server->timeout_queue, newsocket->sock,
1041 silc_server_timeout_remote,
1046 /* Register the connection for network input and output. This sets
1047 that scheduler will listen for incoming packets for this connection
1048 and sets that outgoing packets may be sent to this connection as well.
1049 However, this doesn't set the scheduler for outgoing traffic, it
1050 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1051 later when outgoing data is available. */
1052 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1055 /* Second part of accepting new connection. Key exchange protocol has been
1056 performed and now it is time to do little connection authentication
1057 protocol to figure out whether this connection is client or server
1058 and whether it has right to access this server (especially server
1059 connections needs to be authenticated). */
1061 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1063 SilcProtocol protocol = (SilcProtocol)context;
1064 SilcServerKEInternalContext *ctx =
1065 (SilcServerKEInternalContext *)protocol->context;
1066 SilcServer server = (SilcServer)ctx->server;
1067 SilcSocketConnection sock = server->sockets[fd];
1068 SilcServerConnAuthInternalContext *proto_ctx;
1070 SILC_LOG_DEBUG(("Start"));
1072 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1073 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1074 /* Error occured during protocol */
1075 silc_protocol_free(protocol);
1076 sock->protocol = NULL;
1077 silc_ske_free_key_material(ctx->keymat);
1079 silc_packet_context_free(ctx->packet);
1081 silc_ske_free(ctx->ske);
1083 silc_free(ctx->dest_id);
1085 silc_task_unregister_by_callback(server->timeout_queue,
1086 silc_server_failure_callback);
1087 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1088 "Key exchange failed");
1089 server->stat.auth_failures++;
1093 /* We now have the key material as the result of the key exchange
1094 protocol. Take the key material into use. Free the raw key material
1095 as soon as we've set them into use. */
1096 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1097 ctx->ske->prop->cipher,
1098 ctx->ske->prop->pkcs,
1099 ctx->ske->prop->hash,
1100 ctx->ske->prop->hmac,
1102 silc_protocol_free(protocol);
1103 sock->protocol = NULL;
1104 silc_ske_free_key_material(ctx->keymat);
1106 silc_packet_context_free(ctx->packet);
1108 silc_ske_free(ctx->ske);
1110 silc_free(ctx->dest_id);
1112 silc_task_unregister_by_callback(server->timeout_queue,
1113 silc_server_failure_callback);
1114 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1115 "Key exchange failed");
1116 server->stat.auth_failures++;
1119 silc_ske_free_key_material(ctx->keymat);
1121 /* Allocate internal context for the authentication protocol. This
1122 is sent as context for the protocol. */
1123 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1124 proto_ctx->server = (void *)server;
1125 proto_ctx->sock = sock;
1126 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1127 proto_ctx->responder = TRUE;
1128 proto_ctx->dest_id_type = ctx->dest_id_type;
1129 proto_ctx->dest_id = ctx->dest_id;
1131 /* Free old protocol as it is finished now */
1132 silc_protocol_free(protocol);
1134 silc_packet_context_free(ctx->packet);
1136 sock->protocol = NULL;
1138 /* Allocate the authentication protocol. This is allocated here
1139 but we won't start it yet. We will be receiving party of this
1140 protocol thus we will wait that connecting party will make
1141 their first move. */
1142 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1143 &sock->protocol, proto_ctx,
1144 silc_server_accept_new_connection_final);
1146 /* Register timeout task. If the protocol is not executed inside
1147 this timelimit the connection will be terminated. Currently
1148 this is 60 seconds and is hard coded limit (XXX). */
1149 proto_ctx->timeout_task =
1150 silc_task_register(server->timeout_queue, sock->sock,
1151 silc_server_timeout_remote,
1152 (void *)server, 60, 0,
1157 /* Final part of accepting new connection. The connection has now
1158 been authenticated and keys has been exchanged. We also know whether
1159 this is client or server connection. */
1161 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1163 SilcProtocol protocol = (SilcProtocol)context;
1164 SilcServerConnAuthInternalContext *ctx =
1165 (SilcServerConnAuthInternalContext *)protocol->context;
1166 SilcServer server = (SilcServer)ctx->server;
1167 SilcSocketConnection sock = ctx->sock;
1168 SilcServerHBContext hb_context;
1169 void *id_entry = NULL;
1171 SILC_LOG_DEBUG(("Start"));
1173 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1174 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1175 /* Error occured during protocol */
1176 silc_protocol_free(protocol);
1177 sock->protocol = NULL;
1179 silc_packet_context_free(ctx->packet);
1181 silc_ske_free(ctx->ske);
1183 silc_free(ctx->dest_id);
1186 sock->protocol = NULL;
1187 silc_task_unregister_by_callback(server->timeout_queue,
1188 silc_server_failure_callback);
1189 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1190 "Authentication failed");
1191 server->stat.auth_failures++;
1195 sock->type = ctx->conn_type;
1196 switch(sock->type) {
1197 case SILC_SOCKET_TYPE_CLIENT:
1199 SilcClientEntry client;
1201 SILC_LOG_DEBUG(("Remote host is client"));
1202 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1205 /* Add the client to the client ID cache. The nickname and Client ID
1206 and other information is created after we have received NEW_CLIENT
1207 packet from client. */
1208 client = silc_idlist_add_client(server->local_list,
1209 NULL, 0, NULL, NULL, NULL, NULL, sock);
1211 SILC_LOG_ERROR(("Could not add new client to cache"));
1212 silc_free(sock->user_data);
1217 server->stat.my_clients++;
1218 server->stat.clients++;
1219 if (server->server_type == SILC_ROUTER)
1220 server->stat.cell_clients++;
1222 id_entry = (void *)client;
1225 case SILC_SOCKET_TYPE_SERVER:
1226 case SILC_SOCKET_TYPE_ROUTER:
1228 SilcServerEntry new_server;
1230 SILC_LOG_DEBUG(("Remote host is %s",
1231 sock->type == SILC_SOCKET_TYPE_SERVER ?
1232 "server" : "router"));
1233 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1234 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1235 "server" : "router"));
1237 /* Add the server into server cache. The server name and Server ID
1238 is updated after we have received NEW_SERVER packet from the
1239 server. We mark ourselves as router for this server if we really
1242 silc_idlist_add_server(server->local_list, NULL,
1243 sock->type == SILC_SOCKET_TYPE_SERVER ?
1244 SILC_SERVER : SILC_ROUTER, NULL,
1245 sock->type == SILC_SOCKET_TYPE_SERVER ?
1246 server->id_entry : NULL, sock);
1248 SILC_LOG_ERROR(("Could not add new server to cache"));
1249 silc_free(sock->user_data);
1254 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1255 server->stat.my_servers++;
1257 server->stat.my_routers++;
1258 server->stat.servers++;
1260 id_entry = (void *)new_server;
1262 /* There is connection to other server now, if it is router then
1263 we will have connection to outside world. If we are router but
1264 normal server connected to us then we will remain standalone,
1265 if we are standlone. */
1266 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1267 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1268 server->standalone = FALSE;
1269 if (!server->id_entry->router) {
1270 server->id_entry->router = id_entry;
1271 server->router = id_entry;
1280 /* Add the common data structure to the ID entry. */
1282 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1284 /* Add to sockets internal pointer for fast referencing */
1285 silc_free(sock->user_data);
1286 sock->user_data = id_entry;
1288 /* Connection has been fully established now. Everything is ok. */
1289 SILC_LOG_DEBUG(("New connection authenticated"));
1291 /* Perform keepalive. The `hb_context' will be freed automatically
1292 when finally calling the silc_socket_free function. XXX hardcoded
1294 hb_context = silc_calloc(1, sizeof(*hb_context));
1295 hb_context->server = server;
1296 silc_socket_set_heartbeat(sock, 600, hb_context,
1297 silc_server_perform_heartbeat,
1298 server->timeout_queue);
1300 silc_task_unregister_by_callback(server->timeout_queue,
1301 silc_server_failure_callback);
1302 silc_protocol_free(protocol);
1304 silc_packet_context_free(ctx->packet);
1306 silc_ske_free(ctx->ske);
1308 silc_free(ctx->dest_id);
1310 sock->protocol = NULL;
1313 /* This function is used to read packets from network and send packets to
1314 network. This is usually a generic task. */
1316 SILC_TASK_CALLBACK(silc_server_packet_process)
1318 SilcServer server = (SilcServer)context;
1319 SilcSocketConnection sock = server->sockets[fd];
1320 SilcIDListData idata;
1321 SilcCipher cipher = NULL;
1322 SilcHmac hmac = NULL;
1328 SILC_LOG_DEBUG(("Processing packet"));
1330 /* Packet sending */
1332 if (type == SILC_TASK_WRITE) {
1333 /* Do not send data to disconnected connection */
1334 if (SILC_IS_DISCONNECTED(sock))
1337 server->stat.packets_sent++;
1339 if (sock->outbuf->data - sock->outbuf->head)
1340 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1342 ret = silc_server_packet_send_real(server, sock, TRUE);
1344 /* If returned -2 could not write to connection now, will do
1352 /* The packet has been sent and now it is time to set the connection
1353 back to only for input. When there is again some outgoing data
1354 available for this connection it will be set for output as well.
1355 This call clears the output setting and sets it only for input. */
1356 SILC_SET_CONNECTION_FOR_INPUT(fd);
1357 SILC_UNSET_OUTBUF_PENDING(sock);
1359 silc_buffer_clear(sock->outbuf);
1363 /* Packet receiving */
1365 /* Read some data from connection */
1366 ret = silc_packet_receive(sock);
1372 SILC_LOG_DEBUG(("Read EOF"));
1374 /* If connection is disconnecting already we will finally
1375 close the connection */
1376 if (SILC_IS_DISCONNECTING(sock)) {
1377 if (sock->user_data)
1378 silc_server_free_sock_user_data(server, sock);
1379 silc_server_close_connection(server, sock);
1383 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1384 SILC_SET_DISCONNECTING(sock);
1386 /* If the closed connection was our primary router connection the
1387 start re-connecting phase. */
1388 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1389 sock == server->router->connection)
1390 silc_task_register(server->timeout_queue, 0,
1391 silc_server_connect_to_router,
1394 SILC_TASK_PRI_NORMAL);
1396 if (sock->user_data)
1397 silc_server_free_sock_user_data(server, sock);
1398 silc_server_close_connection(server, sock);
1402 /* If connection is disconnecting or disconnected we will ignore
1404 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1405 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1409 server->stat.packets_received++;
1411 /* Get keys and stuff from ID entry */
1412 idata = (SilcIDListData)sock->user_data;
1414 idata->last_receive = time(NULL);
1415 cipher = idata->receive_key;
1419 /* Process the packet. This will call the parser that will then
1420 decrypt and parse the packet. */
1421 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1425 /* Callback function that the silc_packet_decrypt will call to make the
1426 decision whether the packet is normal or special packet. We will
1427 return TRUE if it is normal and FALSE if it is special */
1429 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1431 SilcPacketContext *packet,
1434 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1435 SilcServer server = (SilcServer)parse_ctx->context;
1437 /* Packet is normal packet, if:
1439 1) packet is private message packet and does not have private key set
1440 2) is other packet than channel message packet
1441 3) is channel message packet and remote is router and we are router
1443 all other packets are special packets
1446 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1447 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1450 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1451 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1452 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1453 server->server_type == SILC_ROUTER))
1459 /* Parses whole packet, received earlier. */
1461 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1463 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1464 SilcServer server = (SilcServer)parse_ctx->context;
1465 SilcSocketConnection sock = parse_ctx->sock;
1466 SilcPacketContext *packet = parse_ctx->packet;
1469 SILC_LOG_DEBUG(("Start"));
1471 /* Decrypt the received packet */
1472 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1473 packet->buffer, packet,
1474 silc_server_packet_decrypt_check, parse_ctx);
1479 /* Parse the packet. Packet type is returned. */
1480 ret = silc_packet_parse(packet);
1482 /* Parse the packet header in special way as this is "special"
1484 ret = silc_packet_parse_special(packet);
1487 if (ret == SILC_PACKET_NONE)
1490 /* Check that the the current client ID is same as in the client's packet. */
1491 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1492 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1493 if (client && client->id) {
1494 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1495 packet->src_id_type);
1496 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1504 if (server->server_type == SILC_ROUTER) {
1505 /* Route the packet if it is not destined to us. Other ID types but
1506 server are handled separately after processing them. */
1507 if (packet->dst_id_type == SILC_ID_SERVER &&
1508 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1509 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1511 /* Route the packet to fastest route for the destination ID */
1512 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1513 packet->dst_id_type);
1516 silc_server_packet_route(server,
1517 silc_server_route_get(server, id,
1518 packet->dst_id_type),
1524 /* Broadcast packet if it is marked as broadcast packet and it is
1525 originated from router and we are router. */
1526 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1527 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1528 silc_server_packet_broadcast(server, server->router->connection, packet);
1532 /* Parse the incoming packet type */
1533 silc_server_packet_parse_type(server, sock, packet);
1536 /* silc_buffer_clear(sock->inbuf); */
1537 silc_packet_context_free(packet);
1538 silc_free(parse_ctx);
1541 /* Parser callback called by silc_packet_receive_process. This merely
1542 registers timeout that will handle the actual parsing when appropriate. */
1544 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1546 SilcServer server = (SilcServer)parser_context->context;
1547 SilcSocketConnection sock = parser_context->sock;
1549 switch (sock->type) {
1550 case SILC_SOCKET_TYPE_CLIENT:
1551 case SILC_SOCKET_TYPE_UNKNOWN:
1552 /* Parse the packet with timeout */
1553 silc_task_register(server->timeout_queue, sock->sock,
1554 silc_server_packet_parse_real,
1555 (void *)parser_context, 0, 100000,
1557 SILC_TASK_PRI_NORMAL);
1559 case SILC_SOCKET_TYPE_SERVER:
1560 case SILC_SOCKET_TYPE_ROUTER:
1561 /* Packets from servers are parsed as soon as possible */
1562 silc_task_register(server->timeout_queue, sock->sock,
1563 silc_server_packet_parse_real,
1564 (void *)parser_context, 0, 1,
1566 SILC_TASK_PRI_NORMAL);
1573 /* Parses the packet type and calls what ever routines the packet type
1574 requires. This is done for all incoming packets. */
1576 void silc_server_packet_parse_type(SilcServer server,
1577 SilcSocketConnection sock,
1578 SilcPacketContext *packet)
1580 SilcPacketType type = packet->type;
1582 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1584 /* Parse the packet type */
1586 case SILC_PACKET_DISCONNECT:
1587 SILC_LOG_DEBUG(("Disconnect packet"));
1588 if (packet->flags & SILC_PACKET_FLAG_LIST)
1592 case SILC_PACKET_SUCCESS:
1594 * Success received for something. For now we can have only
1595 * one protocol for connection executing at once hence this
1596 * success message is for whatever protocol is executing currently.
1598 SILC_LOG_DEBUG(("Success packet"));
1599 if (packet->flags & SILC_PACKET_FLAG_LIST)
1601 if (sock->protocol) {
1602 sock->protocol->execute(server->timeout_queue, 0,
1603 sock->protocol, sock->sock, 0, 0);
1607 case SILC_PACKET_FAILURE:
1609 * Failure received for something. For now we can have only
1610 * one protocol for connection executing at once hence this
1611 * failure message is for whatever protocol is executing currently.
1613 SILC_LOG_DEBUG(("Failure packet"));
1614 if (packet->flags & SILC_PACKET_FLAG_LIST)
1616 if (sock->protocol) {
1617 SilcServerFailureContext f;
1618 f = silc_calloc(1, sizeof(*f));
1622 /* We will wait 5 seconds to process this failure packet */
1623 silc_task_register(server->timeout_queue, sock->sock,
1624 silc_server_failure_callback, (void *)f, 5, 0,
1625 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1629 case SILC_PACKET_REJECT:
1630 SILC_LOG_DEBUG(("Reject packet"));
1631 if (packet->flags & SILC_PACKET_FLAG_LIST)
1636 case SILC_PACKET_NOTIFY:
1638 * Received notify packet. Server can receive notify packets from
1639 * router. Server then relays the notify messages to clients if needed.
1641 SILC_LOG_DEBUG(("Notify packet"));
1642 if (packet->flags & SILC_PACKET_FLAG_LIST)
1643 silc_server_notify_list(server, sock, packet);
1645 silc_server_notify(server, sock, packet);
1651 case SILC_PACKET_CHANNEL_MESSAGE:
1653 * Received channel message. Channel messages are special packets
1654 * (although probably most common ones) thus they are handled
1657 SILC_LOG_DEBUG(("Channel Message packet"));
1658 if (packet->flags & SILC_PACKET_FLAG_LIST)
1660 silc_server_channel_message(server, sock, packet);
1663 case SILC_PACKET_CHANNEL_KEY:
1665 * Received key for channel. As channels are created by the router
1666 * the keys are as well. We will distribute the key to all of our
1667 * locally connected clients on the particular channel. Router
1668 * never receives this channel and thus is ignored.
1670 SILC_LOG_DEBUG(("Channel Key packet"));
1671 if (packet->flags & SILC_PACKET_FLAG_LIST)
1673 silc_server_channel_key(server, sock, packet);
1679 case SILC_PACKET_COMMAND:
1681 * Recived command. Processes the command request and allocates the
1682 * command context and calls the command.
1684 SILC_LOG_DEBUG(("Command packet"));
1685 if (packet->flags & SILC_PACKET_FLAG_LIST)
1687 silc_server_command_process(server, sock, packet);
1690 case SILC_PACKET_COMMAND_REPLY:
1692 * Received command reply packet. Received command reply to command. It
1693 * may be reply to command sent by us or reply to command sent by client
1694 * that we've routed further.
1696 SILC_LOG_DEBUG(("Command Reply packet"));
1697 if (packet->flags & SILC_PACKET_FLAG_LIST)
1699 silc_server_command_reply(server, sock, packet);
1703 * Private Message packets
1705 case SILC_PACKET_PRIVATE_MESSAGE:
1707 * Received private message packet. The packet is coming from either
1710 SILC_LOG_DEBUG(("Private Message packet"));
1711 if (packet->flags & SILC_PACKET_FLAG_LIST)
1713 silc_server_private_message(server, sock, packet);
1716 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1718 * Private message key packet.
1720 if (packet->flags & SILC_PACKET_FLAG_LIST)
1722 silc_server_private_message_key(server, sock, packet);
1726 * Key Exchange protocol packets
1728 case SILC_PACKET_KEY_EXCHANGE:
1729 SILC_LOG_DEBUG(("KE packet"));
1730 if (packet->flags & SILC_PACKET_FLAG_LIST)
1733 if (sock->protocol && sock->protocol->protocol &&
1734 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1736 SilcServerKEInternalContext *proto_ctx =
1737 (SilcServerKEInternalContext *)sock->protocol->context;
1739 proto_ctx->packet = silc_packet_context_dup(packet);
1741 /* Let the protocol handle the packet */
1742 sock->protocol->execute(server->timeout_queue, 0,
1743 sock->protocol, sock->sock, 0, 100000);
1745 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1746 "protocol active, packet dropped."));
1748 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1752 case SILC_PACKET_KEY_EXCHANGE_1:
1753 SILC_LOG_DEBUG(("KE 1 packet"));
1754 if (packet->flags & SILC_PACKET_FLAG_LIST)
1757 if (sock->protocol && sock->protocol->protocol &&
1758 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1760 SilcServerKEInternalContext *proto_ctx =
1761 (SilcServerKEInternalContext *)sock->protocol->context;
1763 if (proto_ctx->packet)
1764 silc_packet_context_free(proto_ctx->packet);
1766 proto_ctx->packet = silc_packet_context_dup(packet);
1767 proto_ctx->dest_id_type = packet->src_id_type;
1768 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1769 packet->src_id_type);
1770 if (!proto_ctx->dest_id)
1773 /* Let the protocol handle the packet */
1774 sock->protocol->execute(server->timeout_queue, 0,
1775 sock->protocol, sock->sock,
1778 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1779 "protocol active, packet dropped."));
1783 case SILC_PACKET_KEY_EXCHANGE_2:
1784 SILC_LOG_DEBUG(("KE 2 packet"));
1785 if (packet->flags & SILC_PACKET_FLAG_LIST)
1788 if (sock->protocol && sock->protocol->protocol &&
1789 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1791 SilcServerKEInternalContext *proto_ctx =
1792 (SilcServerKEInternalContext *)sock->protocol->context;
1794 if (proto_ctx->packet)
1795 silc_packet_context_free(proto_ctx->packet);
1797 proto_ctx->packet = silc_packet_context_dup(packet);
1798 proto_ctx->dest_id_type = packet->src_id_type;
1799 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1800 packet->src_id_type);
1801 if (!proto_ctx->dest_id)
1804 /* Let the protocol handle the packet */
1805 sock->protocol->execute(server->timeout_queue, 0,
1806 sock->protocol, sock->sock,
1809 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1810 "protocol active, packet dropped."));
1814 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1816 * Connection authentication request packet. When we receive this packet
1817 * we will send to the other end information about our mandatory
1818 * authentication method for the connection. This packet maybe received
1821 SILC_LOG_DEBUG(("Connection authentication request packet"));
1822 if (packet->flags & SILC_PACKET_FLAG_LIST)
1824 silc_server_connection_auth_request(server, sock, packet);
1828 * Connection Authentication protocol packets
1830 case SILC_PACKET_CONNECTION_AUTH:
1831 /* Start of the authentication protocol. We receive here the
1832 authentication data and will verify it. */
1833 SILC_LOG_DEBUG(("Connection auth packet"));
1834 if (packet->flags & SILC_PACKET_FLAG_LIST)
1837 if (sock->protocol && sock->protocol->protocol->type
1838 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1840 SilcServerConnAuthInternalContext *proto_ctx =
1841 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1843 proto_ctx->packet = silc_packet_context_dup(packet);
1845 /* Let the protocol handle the packet */
1846 sock->protocol->execute(server->timeout_queue, 0,
1847 sock->protocol, sock->sock, 0, 0);
1849 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1850 "protocol active, packet dropped."));
1854 case SILC_PACKET_NEW_ID:
1856 * Received New ID packet. This includes some new ID that has been
1857 * created. It may be for client, server or channel. This is the way
1858 * to distribute information about new registered entities in the
1861 SILC_LOG_DEBUG(("New ID packet"));
1862 if (packet->flags & SILC_PACKET_FLAG_LIST)
1863 silc_server_new_id_list(server, sock, packet);
1865 silc_server_new_id(server, sock, packet);
1868 case SILC_PACKET_NEW_CLIENT:
1870 * Received new client packet. This includes client information that
1871 * we will use to create initial client ID. After creating new
1872 * ID we will send it to the client.
1874 SILC_LOG_DEBUG(("New Client packet"));
1875 if (packet->flags & SILC_PACKET_FLAG_LIST)
1877 silc_server_new_client(server, sock, packet);
1880 case SILC_PACKET_NEW_SERVER:
1882 * Received new server packet. This includes Server ID and some other
1883 * information that we may save. This is received after server has
1886 SILC_LOG_DEBUG(("New Server packet"));
1887 if (packet->flags & SILC_PACKET_FLAG_LIST)
1889 silc_server_new_server(server, sock, packet);
1892 case SILC_PACKET_NEW_CHANNEL:
1894 * Received new channel packet. Information about new channel in the
1895 * network are distributed using this packet.
1897 SILC_LOG_DEBUG(("New Channel packet"));
1898 if (packet->flags & SILC_PACKET_FLAG_LIST)
1899 silc_server_new_channel_list(server, sock, packet);
1901 silc_server_new_channel(server, sock, packet);
1904 case SILC_PACKET_HEARTBEAT:
1906 * Received heartbeat.
1908 SILC_LOG_DEBUG(("Heartbeat packet"));
1909 if (packet->flags & SILC_PACKET_FLAG_LIST)
1913 case SILC_PACKET_KEY_AGREEMENT:
1915 * Received heartbeat.
1917 SILC_LOG_DEBUG(("Key agreement packet"));
1918 if (packet->flags & SILC_PACKET_FLAG_LIST)
1920 silc_server_key_agreement(server, sock, packet);
1923 case SILC_PACKET_REKEY:
1925 * Received re-key packet. The sender wants to regenerate the session
1928 SILC_LOG_DEBUG(("Re-key packet"));
1929 if (packet->flags & SILC_PACKET_FLAG_LIST)
1931 silc_server_rekey(server, sock, packet);
1934 case SILC_PACKET_REKEY_DONE:
1936 * The re-key is done.
1938 SILC_LOG_DEBUG(("Re-key done packet"));
1939 if (packet->flags & SILC_PACKET_FLAG_LIST)
1942 if (sock->protocol && sock->protocol->protocol &&
1943 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1945 SilcServerRekeyInternalContext *proto_ctx =
1946 (SilcServerRekeyInternalContext *)sock->protocol->context;
1948 if (proto_ctx->packet)
1949 silc_packet_context_free(proto_ctx->packet);
1951 proto_ctx->packet = silc_packet_context_dup(packet);
1953 /* Let the protocol handle the packet */
1954 sock->protocol->execute(server->timeout_queue, 0,
1955 sock->protocol, sock->sock,
1958 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1959 "protocol active, packet dropped."));
1964 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1970 /* Creates connection to a remote router. */
1972 void silc_server_create_connection(SilcServer server,
1973 char *remote_host, uint32 port)
1975 SilcServerConnection sconn;
1977 /* Allocate connection object for hold connection specific stuff. */
1978 sconn = silc_calloc(1, sizeof(*sconn));
1979 sconn->server = server;
1980 sconn->remote_host = strdup(remote_host);
1981 sconn->remote_port = port;
1983 silc_task_register(server->timeout_queue, 0,
1984 silc_server_connect_router,
1985 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1986 SILC_TASK_PRI_NORMAL);
1989 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1991 silc_socket_free((SilcSocketConnection)context);
1994 /* Closes connection to socket connection */
1996 void silc_server_close_connection(SilcServer server,
1997 SilcSocketConnection sock)
1999 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
2001 /* We won't listen for this connection anymore */
2002 silc_schedule_unset_listen_fd(sock->sock);
2004 /* Unregister all tasks */
2005 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2006 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2008 /* Close the actual connection */
2009 silc_net_close_connection(sock->sock);
2010 server->sockets[sock->sock] = NULL;
2012 silc_task_register(server->timeout_queue, 0,
2013 silc_server_close_connection_final,
2014 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2015 SILC_TASK_PRI_NORMAL);
2018 /* Sends disconnect message to remote connection and disconnects the
2021 void silc_server_disconnect_remote(SilcServer server,
2022 SilcSocketConnection sock,
2023 const char *fmt, ...)
2026 unsigned char buf[4096];
2031 memset(buf, 0, sizeof(buf));
2033 vsprintf(buf, fmt, ap);
2036 SILC_LOG_DEBUG(("Disconnecting remote host"));
2038 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2040 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2041 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2042 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2045 /* Notify remote end that the conversation is over. The notify message
2046 is tried to be sent immediately. */
2047 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2048 buf, strlen(buf), TRUE);
2050 /* Mark the connection to be disconnected */
2051 SILC_SET_DISCONNECTED(sock);
2052 silc_server_close_connection(server, sock);
2057 SilcClientEntry client;
2058 } *FreeClientInternal;
2060 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2062 FreeClientInternal i = (FreeClientInternal)context;
2064 silc_idlist_del_data(i->client);
2065 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2069 /* Frees client data and notifies about client's signoff. */
2071 void silc_server_free_client_data(SilcServer server,
2072 SilcSocketConnection sock,
2073 SilcClientEntry client,
2077 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2079 /* If there is pending outgoing data for the client then purge it
2080 to the network before removing the client entry. */
2081 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2082 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2083 server->stat.packets_sent++;
2085 if (sock->outbuf->data - sock->outbuf->head)
2086 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2088 silc_server_packet_send_real(server, sock, TRUE);
2090 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2091 SILC_UNSET_OUTBUF_PENDING(sock);
2092 silc_buffer_clear(sock->outbuf);
2095 /* Send SIGNOFF notify to routers. */
2096 if (notify && !server->standalone && server->router)
2097 silc_server_send_notify_signoff(server, server->router->connection,
2098 server->server_type == SILC_SERVER ?
2099 FALSE : TRUE, client->id,
2100 SILC_ID_CLIENT_LEN, signoff);
2102 /* Remove client from all channels */
2104 silc_server_remove_from_channels(server, NULL, client,
2105 TRUE, signoff, TRUE);
2107 silc_server_remove_from_channels(server, NULL, client,
2108 FALSE, NULL, FALSE);
2110 /* We will not delete the client entry right away. We will take it
2111 into history (for WHOWAS command) for 5 minutes */
2114 silc_task_register(server->timeout_queue, 0,
2115 silc_server_free_client_data_timeout,
2117 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2118 client->data.registered = FALSE;
2120 /* Free the client entry and everything in it */
2121 server->stat.my_clients--;
2122 server->stat.clients--;
2123 if (server->server_type == SILC_ROUTER)
2124 server->stat.cell_clients--;
2127 /* Frees user_data pointer from socket connection object. This also sends
2128 appropriate notify packets to the network to inform about leaving
2131 void silc_server_free_sock_user_data(SilcServer server,
2132 SilcSocketConnection sock)
2134 SILC_LOG_DEBUG(("Start"));
2136 switch(sock->type) {
2137 case SILC_SOCKET_TYPE_CLIENT:
2139 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2140 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2143 case SILC_SOCKET_TYPE_SERVER:
2144 case SILC_SOCKET_TYPE_ROUTER:
2146 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2148 /* Free all client entries that this server owns as they will
2149 become invalid now as well. */
2150 silc_server_remove_clients_by_server(server, user_data, TRUE);
2152 /* If this was our primary router connection then we're lost to
2153 the outside world. */
2154 if (server->router == user_data) {
2155 server->id_entry->router = NULL;
2156 server->router = NULL;
2157 server->standalone = TRUE;
2160 /* Free the server entry */
2161 silc_idlist_del_data(user_data);
2162 silc_idlist_del_server(server->local_list, user_data);
2163 server->stat.my_servers--;
2164 server->stat.servers--;
2165 if (server->server_type == SILC_ROUTER)
2166 server->stat.cell_servers--;
2171 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2173 silc_idlist_del_data(user_data);
2174 silc_free(user_data);
2179 sock->user_data = NULL;
2182 /* This function is used to remove all client entries by the server `entry'.
2183 This is called when the connection is lost to the server. In this case
2184 we must invalidate all the client entries owned by the server `entry'.
2185 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2186 distributed to our local clients. */
2188 int silc_server_remove_clients_by_server(SilcServer server,
2189 SilcServerEntry entry,
2192 SilcIDCacheList list = NULL;
2193 SilcIDCacheEntry id_cache = NULL;
2194 SilcClientEntry client = NULL;
2196 SilcClientEntry *clients = NULL;
2197 uint32 clients_c = 0;
2198 unsigned char **argv = NULL;
2199 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2202 SILC_LOG_DEBUG(("Start"));
2204 if (server_signoff) {
2205 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2206 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2207 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2208 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2209 argv[argc] = idp->data;
2210 argv_lens[argc] = idp->len;
2211 argv_types[argc] = argc + 1;
2213 silc_buffer_free(idp);
2216 if (silc_idcache_find_by_id(server->local_list->clients,
2217 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2219 if (silc_idcache_list_first(list, &id_cache)) {
2221 client = (SilcClientEntry)id_cache->context;
2222 if (client->data.registered == FALSE) {
2223 if (!silc_idcache_list_next(list, &id_cache))
2229 if (client->router != entry) {
2230 if (server_signoff && client->connection) {
2231 clients = silc_realloc(clients,
2232 sizeof(*clients) * (clients_c + 1));
2233 clients[clients_c] = client;
2237 if (!silc_idcache_list_next(list, &id_cache))
2243 if (server_signoff) {
2244 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2245 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2246 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2248 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2250 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2251 memcpy(argv[argc], idp->data, idp->len);
2252 argv_lens[argc] = idp->len;
2253 argv_types[argc] = argc + 1;
2255 silc_buffer_free(idp);
2258 /* Remove the client entry */
2259 silc_server_remove_from_channels(server, NULL, client, FALSE,
2261 silc_idlist_del_client(server->local_list, client);
2263 if (!silc_idcache_list_next(list, &id_cache))
2267 silc_idcache_list_free(list);
2270 if (silc_idcache_find_by_id(server->global_list->clients,
2271 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2273 if (silc_idcache_list_first(list, &id_cache)) {
2275 client = (SilcClientEntry)id_cache->context;
2276 if (client->data.registered == FALSE) {
2277 if (!silc_idcache_list_next(list, &id_cache))
2283 if (client->router != entry) {
2284 if (server_signoff && client->connection) {
2285 clients = silc_realloc(clients,
2286 sizeof(*clients) * (clients_c + 1));
2287 clients[clients_c] = client;
2291 if (!silc_idcache_list_next(list, &id_cache))
2297 if (server_signoff) {
2298 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2299 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2300 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2302 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2304 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2305 memcpy(argv[argc], idp->data, idp->len);
2306 argv_lens[argc] = idp->len;
2307 argv_types[argc] = argc + 1;
2309 silc_buffer_free(idp);
2312 /* Remove the client entry */
2313 silc_server_remove_from_channels(server, NULL, client, FALSE,
2315 silc_idlist_del_client(server->global_list, client);
2317 if (!silc_idcache_list_next(list, &id_cache))
2321 silc_idcache_list_free(list);
2324 /* Send the SERVER_SIGNOFF notify */
2325 if (server_signoff) {
2328 /* Send SERVER_SIGNOFF notify to our primary router */
2329 if (!server->standalone && server->router) {
2330 args = silc_argument_payload_encode(1, argv, argv_lens,
2332 silc_server_send_notify_args(server,
2333 server->router->connection,
2334 server->server_type ==
2335 SILC_SERVER ? FALSE : TRUE,
2336 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2338 silc_buffer_free(args);
2341 args = silc_argument_payload_encode(argc, argv, argv_lens,
2343 /* Send to local clients */
2344 for (i = 0; i < clients_c; i++) {
2345 silc_server_send_notify_args(server, clients[i]->connection,
2346 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2351 silc_buffer_free(args);
2353 silc_free(argv_lens);
2354 silc_free(argv_types);
2360 /* Checks whether given channel has global users. If it does this returns
2361 TRUE and FALSE if there is only locally connected clients on the channel. */
2363 int silc_server_channel_has_global(SilcChannelEntry channel)
2365 SilcChannelClientEntry chl;
2367 silc_list_start(channel->user_list);
2368 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2369 if (chl->client->router)
2376 /* Checks whether given channel has locally connected users. If it does this
2377 returns TRUE and FALSE if there is not one locally connected client. */
2379 int silc_server_channel_has_local(SilcChannelEntry channel)
2381 SilcChannelClientEntry chl;
2383 silc_list_start(channel->user_list);
2384 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2385 if (!chl->client->router)
2392 /* Removes client from all channels it has joined. This is used when client
2393 connection is disconnected. If the client on a channel is last, the
2394 channel is removed as well. This sends the SIGNOFF notify types. */
2396 void silc_server_remove_from_channels(SilcServer server,
2397 SilcSocketConnection sock,
2398 SilcClientEntry client,
2400 char *signoff_message,
2403 SilcChannelEntry channel;
2404 SilcChannelClientEntry chl;
2407 SILC_LOG_DEBUG(("Start"));
2409 if (!client || !client->id)
2412 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2414 /* Remove the client from all channels. The client is removed from
2415 the channels' user list. */
2416 silc_list_start(client->channels);
2417 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2418 channel = chl->channel;
2420 /* Remove channel from client's channel list */
2421 silc_list_del(client->channels, chl);
2423 /* Remove channel if there is no users anymore */
2424 if (server->server_type == SILC_ROUTER &&
2425 silc_list_count(channel->user_list) < 2) {
2426 server->stat.my_channels--;
2429 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2431 if (channel->founder_key) {
2432 /* The founder auth data exists, do not remove the channel entry */
2433 SilcChannelClientEntry chl2;
2437 silc_list_start(channel->user_list);
2438 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2439 silc_list_del(chl2->client->channels, chl2);
2440 silc_list_del(channel->user_list, chl2);
2446 if (!silc_idlist_del_channel(server->local_list, channel))
2447 silc_idlist_del_channel(server->global_list, channel);
2451 /* Remove client from channel's client list */
2452 silc_list_del(channel->user_list, chl);
2454 server->stat.my_chanclients--;
2456 /* If there is no global users on the channel anymore mark the channel
2457 as local channel. */
2458 if (server->server_type == SILC_SERVER &&
2459 !silc_server_channel_has_global(channel))
2460 channel->global_users = FALSE;
2462 /* If there is not at least one local user on the channel then we don't
2463 need the channel entry anymore, we can remove it safely. */
2464 if (server->server_type == SILC_SERVER &&
2465 !silc_server_channel_has_local(channel)) {
2466 /* Notify about leaving client if this channel has global users. */
2467 if (notify && channel->global_users)
2468 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2469 SILC_NOTIFY_TYPE_SIGNOFF,
2470 signoff_message ? 2 : 1,
2471 clidp->data, clidp->len,
2472 signoff_message, signoff_message ?
2473 strlen(signoff_message) : 0);
2475 server->stat.my_channels--;
2478 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2480 if (channel->founder_key) {
2481 /* The founder auth data exists, do not remove the channel entry */
2482 SilcChannelClientEntry chl2;
2486 silc_list_start(channel->user_list);
2487 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2488 silc_list_del(chl2->client->channels, chl2);
2489 silc_list_del(channel->user_list, chl2);
2495 if (!silc_idlist_del_channel(server->local_list, channel))
2496 silc_idlist_del_channel(server->global_list, channel);
2500 /* Send notify to channel about client leaving SILC and thus
2501 the entire channel. */
2503 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2504 SILC_NOTIFY_TYPE_SIGNOFF,
2505 signoff_message ? 2 : 1,
2506 clidp->data, clidp->len,
2507 signoff_message, signoff_message ?
2508 strlen(signoff_message) : 0);
2510 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2511 /* Re-generate channel key */
2512 silc_server_create_channel_key(server, channel, 0);
2514 /* Send the channel key to the channel. The key of course is not sent
2515 to the client who was removed from the channel. */
2516 silc_server_send_channel_key(server, client->connection, channel,
2517 server->server_type == SILC_ROUTER ?
2518 FALSE : !server->standalone);
2522 silc_buffer_free(clidp);
2525 /* Removes client from one channel. This is used for example when client
2526 calls LEAVE command to remove itself from the channel. Returns TRUE
2527 if channel still exists and FALSE if the channel is removed when
2528 last client leaves the channel. If `notify' is FALSE notify messages
2531 int silc_server_remove_from_one_channel(SilcServer server,
2532 SilcSocketConnection sock,
2533 SilcChannelEntry channel,
2534 SilcClientEntry client,
2537 SilcChannelEntry ch;
2538 SilcChannelClientEntry chl;
2541 SILC_LOG_DEBUG(("Start"));
2543 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2545 /* Remove the client from the channel. The client is removed from
2546 the channel's user list. */
2547 silc_list_start(client->channels);
2548 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2549 if (chl->channel != channel)
2554 /* Remove channel from client's channel list */
2555 silc_list_del(client->channels, chl);
2557 /* Remove channel if there is no users anymore */
2558 if (server->server_type == SILC_ROUTER &&
2559 silc_list_count(channel->user_list) < 2) {
2561 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2562 if (!silc_idlist_del_channel(server->local_list, channel))
2563 silc_idlist_del_channel(server->global_list, channel);
2564 silc_buffer_free(clidp);
2565 server->stat.my_channels--;
2569 /* Remove client from channel's client list */
2570 silc_list_del(channel->user_list, chl);
2572 server->stat.my_chanclients--;
2574 /* If there is no global users on the channel anymore mark the channel
2575 as local channel. */
2576 if (server->server_type == SILC_SERVER &&
2577 !silc_server_channel_has_global(channel))
2578 channel->global_users = FALSE;
2580 /* If there is not at least one local user on the channel then we don't
2581 need the channel entry anymore, we can remove it safely. */
2582 if (server->server_type == SILC_SERVER &&
2583 !silc_server_channel_has_local(channel)) {
2584 /* Notify about leaving client if this channel has global users. */
2585 if (notify && channel->global_users)
2586 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2587 SILC_NOTIFY_TYPE_LEAVE, 1,
2588 clidp->data, clidp->len);
2590 server->stat.my_channels--;
2591 silc_buffer_free(clidp);
2594 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2596 if (channel->founder_key) {
2597 /* The founder auth data exists, do not remove the channel entry */
2598 SilcChannelClientEntry chl2;
2602 silc_list_start(channel->user_list);
2603 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2604 silc_list_del(chl2->client->channels, chl2);
2605 silc_list_del(channel->user_list, chl2);
2611 if (!silc_idlist_del_channel(server->local_list, channel))
2612 silc_idlist_del_channel(server->global_list, channel);
2616 /* Send notify to channel about client leaving the channel */
2618 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2619 SILC_NOTIFY_TYPE_LEAVE, 1,
2620 clidp->data, clidp->len);
2624 silc_buffer_free(clidp);
2628 /* Returns TRUE if the given client is on the channel. FALSE if not.
2629 This works because we assure that the user list on the channel is
2630 always in up to date thus we can only check the channel list from
2631 `client' which is faster than checking the user list from `channel'. */
2633 int silc_server_client_on_channel(SilcClientEntry client,
2634 SilcChannelEntry channel)
2636 SilcChannelClientEntry chl;
2638 if (!client || !channel)
2641 silc_list_start(client->channels);
2642 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2643 if (chl->channel == channel)
2649 /* Timeout callback. This is called if connection is idle or for some
2650 other reason is not responding within some period of time. This
2651 disconnects the remote end. */
2653 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2655 SilcServer server = (SilcServer)context;
2656 SilcSocketConnection sock = server->sockets[fd];
2661 if (sock->user_data)
2662 silc_server_free_sock_user_data(server, sock);
2664 silc_server_disconnect_remote(server, sock,
2665 "Server closed connection: "
2666 "Connection timeout");
2669 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2670 function may be used only by router. In real SILC network all channels
2671 are created by routers thus this function is never used by normal
2674 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2675 SilcServerID *router_id,
2681 SilcChannelID *channel_id;
2682 SilcChannelEntry entry;
2686 SILC_LOG_DEBUG(("Creating new channel"));
2689 cipher = "aes-256-cbc";
2691 hmac = "hmac-sha1-96";
2693 /* Allocate cipher */
2694 if (!silc_cipher_alloc(cipher, &key))
2698 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2699 silc_cipher_free(key);
2703 channel_name = strdup(channel_name);
2705 /* Create the channel */
2706 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2707 entry = silc_idlist_add_channel(server->local_list, channel_name,
2708 SILC_CHANNEL_MODE_NONE, channel_id,
2709 NULL, key, newhmac);
2711 silc_free(channel_name);
2715 entry->cipher = strdup(cipher);
2716 entry->hmac_name = strdup(hmac);
2718 /* Now create the actual key material */
2719 silc_server_create_channel_key(server, entry,
2720 silc_cipher_get_key_len(key) / 8);
2722 /* Notify other routers about the new channel. We send the packet
2723 to our primary route. */
2724 if (broadcast && server->standalone == FALSE)
2725 silc_server_send_new_channel(server, server->router->connection, TRUE,
2726 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2729 server->stat.my_channels++;
2734 /* Same as above but creates the channel with Channel ID `channel_id. */
2737 silc_server_create_new_channel_with_id(SilcServer server,
2741 SilcChannelID *channel_id,
2744 SilcChannelEntry entry;
2748 SILC_LOG_DEBUG(("Creating new channel"));
2751 cipher = "aes-256-cbc";
2753 hmac = "hmac-sha1-96";
2755 /* Allocate cipher */
2756 if (!silc_cipher_alloc(cipher, &key))
2760 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2761 silc_cipher_free(key);
2765 channel_name = strdup(channel_name);
2767 /* Create the channel */
2768 entry = silc_idlist_add_channel(server->local_list, channel_name,
2769 SILC_CHANNEL_MODE_NONE, channel_id,
2770 NULL, key, newhmac);
2772 silc_free(channel_name);
2776 /* Now create the actual key material */
2777 silc_server_create_channel_key(server, entry,
2778 silc_cipher_get_key_len(key) / 8);
2780 /* Notify other routers about the new channel. We send the packet
2781 to our primary route. */
2782 if (broadcast && server->standalone == FALSE)
2783 silc_server_send_new_channel(server, server->router->connection, TRUE,
2784 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2787 server->stat.my_channels++;
2792 /* Channel's key re-key timeout callback. */
2794 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2796 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2797 SilcServer server = (SilcServer)rekey->context;
2799 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2800 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2802 silc_task_register(server->timeout_queue, 0,
2803 silc_server_channel_key_rekey,
2804 (void *)rekey, 3600, 0,
2806 SILC_TASK_PRI_NORMAL);
2809 /* Generates new channel key. This is used to create the initial channel key
2810 but also to re-generate new key for channel. If `key_len' is provided
2811 it is the bytes of the key length. */
2813 void silc_server_create_channel_key(SilcServer server,
2814 SilcChannelEntry channel,
2818 unsigned char channel_key[32], hash[32];
2821 SILC_LOG_DEBUG(("Generating channel key"));
2823 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2824 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2828 if (!channel->channel_key)
2829 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2834 else if (channel->key_len)
2835 len = channel->key_len / 8;
2837 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2839 /* Create channel key */
2840 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2843 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2845 /* Remove old key if exists */
2847 memset(channel->key, 0, channel->key_len / 8);
2848 silc_free(channel->key);
2852 channel->key_len = len * 8;
2853 channel->key = silc_calloc(len, sizeof(*channel->key));
2854 memcpy(channel->key, channel_key, len);
2855 memset(channel_key, 0, sizeof(channel_key));
2857 /* Generate HMAC key from the channel key data and set it */
2859 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2860 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2861 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2862 memset(hash, 0, sizeof(hash));
2864 if (server->server_type == SILC_ROUTER) {
2865 if (!channel->rekey)
2866 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2867 channel->rekey->context = (void *)server;
2868 channel->rekey->channel = channel;
2869 channel->rekey->key_len = key_len;
2871 silc_task_unregister_by_callback(server->timeout_queue,
2872 silc_server_channel_key_rekey);
2873 silc_task_register(server->timeout_queue, 0,
2874 silc_server_channel_key_rekey,
2875 (void *)channel->rekey, 3600, 0,
2877 SILC_TASK_PRI_NORMAL);
2881 /* Saves the channel key found in the encoded `key_payload' buffer. This
2882 function is used when we receive Channel Key Payload and also when we're
2883 processing JOIN command reply. Returns entry to the channel. */
2885 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2886 SilcBuffer key_payload,
2887 SilcChannelEntry channel)
2889 SilcChannelKeyPayload payload = NULL;
2890 SilcChannelID *id = NULL;
2891 unsigned char *tmp, hash[32];
2895 SILC_LOG_DEBUG(("Start"));
2897 /* Decode channel key payload */
2898 payload = silc_channel_key_payload_parse(key_payload);
2900 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2905 /* Get the channel entry */
2908 /* Get channel ID */
2909 tmp = silc_channel_key_get_id(payload, &tmp_len);
2910 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2916 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2918 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2920 SILC_LOG_ERROR(("Received key for non-existent channel"));
2926 tmp = silc_channel_key_get_key(payload, &tmp_len);
2932 cipher = silc_channel_key_get_cipher(payload, NULL);
2938 /* Remove old key if exists */
2940 memset(channel->key, 0, channel->key_len / 8);
2941 silc_free(channel->key);
2942 silc_cipher_free(channel->channel_key);
2945 /* Create new cipher */
2946 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2951 if (channel->cipher)
2952 silc_free(channel->cipher);
2953 channel->cipher = strdup(cipher);
2956 channel->key_len = tmp_len * 8;
2957 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2958 memcpy(channel->key, tmp, tmp_len);
2959 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2961 /* Generate HMAC key from the channel key data and set it */
2963 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2964 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2965 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2967 memset(hash, 0, sizeof(hash));
2968 memset(tmp, 0, tmp_len);
2970 if (server->server_type == SILC_ROUTER) {
2971 if (!channel->rekey)
2972 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2973 channel->rekey->context = (void *)server;
2974 channel->rekey->channel = channel;
2976 silc_task_unregister_by_callback(server->timeout_queue,
2977 silc_server_channel_key_rekey);
2978 silc_task_register(server->timeout_queue, 0,
2979 silc_server_channel_key_rekey,
2980 (void *)channel->rekey, 3600, 0,
2982 SILC_TASK_PRI_NORMAL);
2989 silc_channel_key_payload_free(payload);
2994 /* Heartbeat callback. This function is set as argument for the
2995 silc_socket_set_heartbeat function. The library will call this function
2996 at the set time interval. */
2998 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3001 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3003 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3006 /* Send the heartbeat */
3007 silc_server_send_heartbeat(hb->server, sock);
3010 /* Returns assembled of all servers in the given ID list. The packet's
3011 form is dictated by the New ID payload. */
3013 static void silc_server_announce_get_servers(SilcServer server,
3015 SilcBuffer *servers)
3017 SilcIDCacheList list;
3018 SilcIDCacheEntry id_cache;
3019 SilcServerEntry entry;
3022 /* Go through all clients in the list */
3023 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3024 SILC_ID_SERVER, &list)) {
3025 if (silc_idcache_list_first(list, &id_cache)) {
3027 entry = (SilcServerEntry)id_cache->context;
3029 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3031 *servers = silc_buffer_realloc(*servers,
3033 (*servers)->truelen + idp->len :
3035 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3036 silc_buffer_put(*servers, idp->data, idp->len);
3037 silc_buffer_pull(*servers, idp->len);
3038 silc_buffer_free(idp);
3040 if (!silc_idcache_list_next(list, &id_cache))
3045 silc_idcache_list_free(list);
3049 /* This function is used by router to announce existing servers to our
3050 primary router when we've connected to it. */
3052 void silc_server_announce_servers(SilcServer server)
3054 SilcBuffer servers = NULL;
3056 SILC_LOG_DEBUG(("Announcing servers"));
3058 /* Get servers in local list */
3059 silc_server_announce_get_servers(server, server->local_list, &servers);
3061 /* Get servers in global list */
3062 silc_server_announce_get_servers(server, server->global_list, &servers);
3065 silc_buffer_push(servers, servers->data - servers->head);
3066 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3068 /* Send the packet */
3069 silc_server_packet_send(server, server->router->connection,
3070 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3071 servers->data, servers->len, TRUE);
3073 silc_buffer_free(servers);
3077 /* Returns assembled packet of all clients in the given ID list. The
3078 packet's form is dictated by the New ID Payload. */
3080 static void silc_server_announce_get_clients(SilcServer server,
3082 SilcBuffer *clients)
3084 SilcIDCacheList list;
3085 SilcIDCacheEntry id_cache;
3086 SilcClientEntry client;
3089 /* Go through all clients in the list */
3090 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3091 SILC_ID_CLIENT, &list)) {
3092 if (silc_idcache_list_first(list, &id_cache)) {
3094 client = (SilcClientEntry)id_cache->context;
3096 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3098 *clients = silc_buffer_realloc(*clients,
3100 (*clients)->truelen + idp->len :
3102 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3103 silc_buffer_put(*clients, idp->data, idp->len);
3104 silc_buffer_pull(*clients, idp->len);
3105 silc_buffer_free(idp);
3107 if (!silc_idcache_list_next(list, &id_cache))
3112 silc_idcache_list_free(list);
3116 /* This function is used to announce our existing clients to our router
3117 when we've connected to it. */
3119 void silc_server_announce_clients(SilcServer server)
3121 SilcBuffer clients = NULL;
3123 SILC_LOG_DEBUG(("Announcing clients"));
3125 /* Get clients in local list */
3126 silc_server_announce_get_clients(server, server->local_list,
3129 /* As router we announce our global list as well */
3130 if (server->server_type == SILC_ROUTER)
3131 silc_server_announce_get_clients(server, server->global_list,
3135 silc_buffer_push(clients, clients->data - clients->head);
3136 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3138 /* Send the packet */
3139 silc_server_packet_send(server, server->router->connection,
3140 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3141 clients->data, clients->len, TRUE);
3143 silc_buffer_free(clients);
3148 silc_server_announce_encode_join(uint32 argc, ...)
3153 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3156 /* Returns assembled packets for channel users of the `channel'. */
3158 void silc_server_announce_get_channel_users(SilcServer server,
3159 SilcChannelEntry channel,
3160 SilcBuffer *channel_users)
3162 SilcChannelClientEntry chl;
3163 SilcBuffer chidp, clidp;
3167 SILC_LOG_DEBUG(("Start"));
3169 /* Now find all users on the channel */
3170 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3171 silc_list_start(channel->user_list);
3172 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3173 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3174 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3175 chidp->data, chidp->len);
3178 silc_buffer_realloc(*channel_users,
3180 (*channel_users)->truelen + len : len));
3181 silc_buffer_pull_tail(*channel_users,
3182 ((*channel_users)->end -
3183 (*channel_users)->data));
3185 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3186 silc_buffer_pull(*channel_users, len);
3187 silc_buffer_free(clidp);
3188 silc_buffer_free(tmp);
3190 silc_buffer_free(chidp);
3193 /* Returns assembled packets for all channels and users on those channels
3194 from the given ID List. The packets are in the form dictated by the
3195 New Channel and New Channel User payloads. */
3197 void silc_server_announce_get_channels(SilcServer server,
3199 SilcBuffer *channels,
3200 SilcBuffer *channel_users)
3202 SilcIDCacheList list;
3203 SilcIDCacheEntry id_cache;
3204 SilcChannelEntry channel;
3209 SILC_LOG_DEBUG(("Start"));
3211 /* Go through all channels in the list */
3212 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3213 SILC_ID_CHANNEL, &list)) {
3214 if (silc_idcache_list_first(list, &id_cache)) {
3216 channel = (SilcChannelEntry)id_cache->context;
3218 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3219 name_len = strlen(channel->channel_name);
3221 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3223 silc_buffer_realloc(*channels,
3224 (*channels ? (*channels)->truelen + len : len));
3225 silc_buffer_pull_tail(*channels,
3226 ((*channels)->end - (*channels)->data));
3227 silc_buffer_format(*channels,
3228 SILC_STR_UI_SHORT(name_len),
3229 SILC_STR_UI_XNSTRING(channel->channel_name,
3231 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3232 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3233 SILC_STR_UI_INT(channel->mode),
3235 silc_buffer_pull(*channels, len);
3237 silc_server_announce_get_channel_users(server, channel,
3242 if (!silc_idcache_list_next(list, &id_cache))
3247 silc_idcache_list_free(list);
3251 /* This function is used to announce our existing channels to our router
3252 when we've connected to it. This also announces the users on the
3253 channels to the router. */
3255 void silc_server_announce_channels(SilcServer server)
3257 SilcBuffer channels = NULL, channel_users = NULL;
3259 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3261 /* Get channels and channel users in local list */
3262 silc_server_announce_get_channels(server, server->local_list,
3263 &channels, &channel_users);
3265 /* Get channels and channel users in global list */
3266 silc_server_announce_get_channels(server, server->global_list,
3267 &channels, &channel_users);
3270 silc_buffer_push(channels, channels->data - channels->head);
3271 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3273 /* Send the packet */
3274 silc_server_packet_send(server, server->router->connection,
3275 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3276 channels->data, channels->len,
3279 silc_buffer_free(channels);
3282 if (channel_users) {
3283 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3284 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3285 channel_users->len);
3287 /* Send the packet */
3288 silc_server_packet_send(server, server->router->connection,
3289 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3290 channel_users->data, channel_users->len,
3293 silc_buffer_free(channel_users);
3297 /* Failure timeout callback. If this is called then we will immediately
3298 process the received failure. We always process the failure with timeout
3299 since we do not want to blindly trust to received failure packets.
3300 This won't be called (the timeout is cancelled) if the failure was
3301 bogus (it is bogus if remote does not close the connection after sending
3304 SILC_TASK_CALLBACK(silc_server_failure_callback)
3306 SilcServerFailureContext f = (SilcServerFailureContext)context;
3308 if (f->sock->protocol) {
3309 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3310 f->sock->protocol->execute(f->server->timeout_queue, 0,
3311 f->sock->protocol, f->sock->sock, 0, 0);
3317 /* Assembles user list and users mode list from the `channel'. */
3319 void silc_server_get_users_on_channel(SilcServer server,
3320 SilcChannelEntry channel,
3321 SilcBuffer *user_list,
3322 SilcBuffer *mode_list,
3325 SilcChannelClientEntry chl;
3326 SilcBuffer client_id_list;
3327 SilcBuffer client_mode_list;
3329 uint32 list_count = 0;
3331 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3332 silc_list_count(channel->user_list));
3333 client_mode_list = silc_buffer_alloc(4 *
3334 silc_list_count(channel->user_list));
3335 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3336 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3337 silc_list_start(channel->user_list);
3338 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3340 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3341 silc_buffer_put(client_id_list, idp->data, idp->len);
3342 silc_buffer_pull(client_id_list, idp->len);
3343 silc_buffer_free(idp);
3345 /* Client's mode on channel */
3346 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3347 silc_buffer_pull(client_mode_list, 4);
3351 silc_buffer_push(client_id_list,
3352 client_id_list->data - client_id_list->head);
3353 silc_buffer_push(client_mode_list,
3354 client_mode_list->data - client_mode_list->head);
3356 *user_list = client_id_list;
3357 *mode_list = client_mode_list;
3358 *user_count = list_count;
3361 /* Saves users and their modes to the `channel'. */
3363 void silc_server_save_users_on_channel(SilcServer server,
3364 SilcSocketConnection sock,
3365 SilcChannelEntry channel,
3366 SilcClientID *noadd,
3367 SilcBuffer user_list,
3368 SilcBuffer mode_list,
3373 /* Cache the received Client ID's and modes. This cache expires
3374 whenever server sends notify message to channel. It means two things;
3375 some user has joined or leaved the channel. XXX TODO! */
3376 for (i = 0; i < user_count; i++) {
3379 SilcClientID *client_id;
3380 SilcClientEntry client;
3383 SILC_GET16_MSB(idp_len, user_list->data + 2);
3385 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3386 silc_buffer_pull(user_list, idp_len);
3391 SILC_GET32_MSB(mode, mode_list->data);
3392 silc_buffer_pull(mode_list, 4);
3394 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3395 silc_free(client_id);
3399 /* Check if we have this client cached already. */
3400 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3403 client = silc_idlist_find_client_by_id(server->global_list,
3406 /* If router did not find such Client ID in its lists then this must
3407 be bogus client or some router in the net is buggy. */
3408 if (server->server_type == SILC_ROUTER) {
3409 silc_free(client_id);
3413 /* We don't have that client anywhere, add it. The client is added
3414 to global list since server didn't have it in the lists so it must be
3416 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3418 silc_id_dup(client_id, SILC_ID_CLIENT),
3419 sock->user_data, NULL);
3421 silc_free(client_id);
3425 client->data.registered = TRUE;
3428 silc_free(client_id);
3430 if (!silc_server_client_on_channel(client, channel)) {
3431 /* Client was not on the channel, add it. */
3432 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3433 chl->client = client;
3435 chl->channel = channel;
3436 silc_list_add(channel->user_list, chl);
3437 silc_list_add(client->channels, chl);
3442 /* Lookups route to the client indicated by `id' client ID. The connection
3443 object and internal data object is returned. Returns NULL if route
3444 could not be found to the client. If the `client_id' is specified then
3445 it is used and the `id_data' is ignored. */
3447 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3448 unsigned char *id_data,
3450 SilcClientID *client_id,
3451 SilcIDListData *idata)
3454 SilcClientEntry client;
3456 SILC_LOG_DEBUG(("Start"));
3458 /* Decode destination Client ID */
3460 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3462 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3466 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3469 /* If the destination belongs to our server we don't have to route
3470 the packet anywhere but to send it to the local destination. */
3471 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3475 if (client && client->data.registered == FALSE)
3478 /* If we are router and the client has router then the client is in
3479 our cell but not directly connected to us. */
3480 if (server->server_type == SILC_ROUTER && client->router) {
3481 /* We are of course in this case the client's router thus the real
3482 "router" of the client is the server who owns the client. Thus
3483 we will send the packet to that server. */
3484 *idata = (SilcIDListData)client->router;
3485 return client->router->connection;
3488 /* Seems that client really is directly connected to us */
3489 *idata = (SilcIDListData)client;
3490 return client->connection;
3493 /* Destination belongs to someone not in this server. If we are normal
3494 server our action is to send the packet to our router. */
3495 if (server->server_type == SILC_SERVER && !server->standalone) {
3497 *idata = (SilcIDListData)server->router;
3498 return server->router->connection;
3501 /* We are router and we will perform route lookup for the destination
3502 and send the packet to fastest route. */
3503 if (server->server_type == SILC_ROUTER && !server->standalone) {
3504 /* Check first that the ID is valid */
3505 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3507 SilcSocketConnection dst_sock;
3509 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3512 *idata = (SilcIDListData)dst_sock->user_data;
3521 /* Encodes and returns channel list of channels the `client' has joined.
3522 Secret channels are not put to the list. */
3524 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3525 SilcClientEntry client)
3527 SilcBuffer buffer = NULL;
3528 SilcChannelEntry channel;
3529 SilcChannelClientEntry chl;
3534 silc_list_start(client->channels);
3535 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3536 channel = chl->channel;
3538 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3541 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3542 name_len = strlen(channel->channel_name);
3544 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3545 buffer = silc_buffer_realloc(buffer,
3546 (buffer ? (buffer)->truelen + len : len));
3547 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3548 silc_buffer_format(buffer,
3549 SILC_STR_UI_SHORT(name_len),
3550 SILC_STR_UI_XNSTRING(channel->channel_name,
3552 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3553 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3554 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3556 silc_buffer_pull(buffer, len);
3561 silc_buffer_push(buffer, buffer->data - buffer->head);
3566 /* Finds client entry by Client ID and if it is not found then resolves
3567 it using WHOIS command. */
3569 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3570 SilcClientID *client_id)
3572 SilcClientEntry client;
3574 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3576 client = silc_idlist_find_client_by_id(server->global_list,
3578 if (!client && server->server_type == SILC_ROUTER)
3582 if (!client && server->standalone)
3585 if (!client || !client->nickname || !client->username) {
3586 SilcBuffer buffer, idp;
3588 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3589 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3590 ++server->cmd_ident, 1,
3591 3, idp->data, idp->len);
3592 silc_server_packet_send(server, client ? client->router->connection :
3593 server->router->connection,
3594 SILC_PACKET_COMMAND, 0,
3595 buffer->data, buffer->len, FALSE);
3596 silc_buffer_free(idp);
3597 silc_buffer_free(buffer);
3603 /* A timeout callback for the re-key. We will be the initiator of the
3606 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3608 SilcServerRekeyContext rekey = (SilcServerRekeyContext)context;
3609 SilcServer server = rekey->server;
3610 SilcProtocol protocol;
3611 SilcServerRekeyInternalContext *proto_ctx;
3613 SILC_LOG_DEBUG(("Start"));
3615 /* Allocate internal protocol context. This is sent as context
3617 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3618 proto_ctx->server = (void *)server;
3619 proto_ctx->context = context;
3620 proto_ctx->sock = rekey->sock;
3621 proto_ctx->responder = FALSE;
3623 /* Perform rekey protocol. Will call the final callback after the
3624 protocol is over. */
3625 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3626 &protocol, proto_ctx, silc_server_rekey_final);
3627 rekey->sock->protocol = protocol;
3629 /* Run the protocol */
3630 protocol->execute(server->timeout_queue, 0, protocol,
3631 rekey->sock->sock, 0, 0);
3633 /* Re-register re-key timeout */
3634 silc_task_register(server->timeout_queue, 0,
3635 silc_server_rekey_callback,
3636 context, rekey->timeout, 0,
3637 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3640 /* The final callback for the REKEY protocol. This will actually take the
3641 new key material into use. */
3643 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3645 SilcProtocol protocol = (SilcProtocol)context;
3646 SilcServerRekeyInternalContext *ctx =
3647 (SilcServerRekeyInternalContext *)protocol->context;
3648 SilcServer server = (SilcServer)ctx->server;
3649 SilcSocketConnection sock = ctx->sock;
3651 SILC_LOG_DEBUG(("Start"));
3653 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3654 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3655 /* Error occured during protocol */
3656 silc_protocol_free(protocol);
3657 sock->protocol = NULL;
3659 silc_ske_free_key_material(ctx->keymat);
3661 silc_packet_context_free(ctx->packet);
3663 silc_ske_free(ctx->ske);
3668 /* Take the keys into use */
3669 if (ctx->pfs == TRUE) {
3672 /* Then just generate the new keys and take them into use */
3673 silc_server_protocol_rekey_generate(server, ctx);
3677 silc_protocol_free(protocol);
3678 sock->protocol = NULL;
3680 silc_ske_free_key_material(ctx->keymat);
3682 silc_packet_context_free(ctx->packet);
3684 silc_ske_free(ctx->ske);