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,
747 ctx->ske->prop->group,
749 silc_protocol_free(protocol);
750 sock->protocol = NULL;
751 silc_ske_free_key_material(ctx->keymat);
753 silc_packet_context_free(ctx->packet);
755 silc_ske_free(ctx->ske);
757 silc_free(ctx->dest_id);
759 silc_task_unregister_by_callback(server->timeout_queue,
760 silc_server_failure_callback);
761 silc_server_disconnect_remote(server, sock, "Server closed connection: "
762 "Key exchange failed");
765 silc_ske_free_key_material(ctx->keymat);
767 /* Allocate internal context for the authentication protocol. This
768 is sent as context for the protocol. */
769 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
770 proto_ctx->server = (void *)server;
771 proto_ctx->context = (void *)sconn;
772 proto_ctx->sock = sock;
773 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
774 proto_ctx->dest_id_type = ctx->dest_id_type;
775 proto_ctx->dest_id = ctx->dest_id;
777 /* Resolve the authentication method used in this connection. Check if
778 we find a match from user configured connections */
779 conn = silc_server_config_find_router_conn(server->config,
783 /* Match found. Use the configured authentication method */
784 proto_ctx->auth_meth = conn->auth_meth;
785 if (conn->auth_data) {
786 proto_ctx->auth_data = strdup(conn->auth_data);
787 proto_ctx->auth_data_len = strlen(conn->auth_data);
790 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
791 sock->hostname, sock->ip, sock->port));
792 silc_protocol_free(protocol);
793 sock->protocol = NULL;
795 silc_packet_context_free(ctx->packet);
797 silc_ske_free(ctx->ske);
799 silc_free(ctx->dest_id);
801 silc_task_unregister_by_callback(server->timeout_queue,
802 silc_server_failure_callback);
803 silc_server_disconnect_remote(server, sock, "Server closed connection: "
804 "Key exchange failed");
808 /* Free old protocol as it is finished now */
809 silc_protocol_free(protocol);
811 silc_packet_context_free(ctx->packet);
813 sock->protocol = NULL;
815 /* Allocate the authentication protocol. This is allocated here
816 but we won't start it yet. We will be receiving party of this
817 protocol thus we will wait that connecting party will make
819 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
820 &sock->protocol, proto_ctx,
821 silc_server_connect_to_router_final);
823 /* Register timeout task. If the protocol is not executed inside
824 this timelimit the connection will be terminated. Currently
825 this is 15 seconds and is hard coded limit (XXX). */
826 proto_ctx->timeout_task =
827 silc_task_register(server->timeout_queue, sock->sock,
828 silc_server_timeout_remote,
829 (void *)server, 15, 0,
833 /* Run the protocol */
834 sock->protocol->execute(server->timeout_queue, 0,
835 sock->protocol, sock->sock, 0, 0);
838 /* Finalizes the connection to router. Registers a server task to the
839 queue so that we can accept new connections. */
841 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
843 SilcProtocol protocol = (SilcProtocol)context;
844 SilcServerConnAuthInternalContext *ctx =
845 (SilcServerConnAuthInternalContext *)protocol->context;
846 SilcServer server = (SilcServer)ctx->server;
847 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
848 SilcSocketConnection sock = ctx->sock;
849 SilcServerEntry id_entry;
851 SilcServerHBContext hb_context;
852 unsigned char *id_string;
853 SilcIDListData idata;
855 SILC_LOG_DEBUG(("Start"));
857 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
858 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
859 /* Error occured during protocol */
861 silc_free(ctx->dest_id);
862 silc_server_disconnect_remote(server, sock, "Server closed connection: "
863 "Authentication failed");
867 /* Add a task to the queue. This task receives new connections to the
868 server. This task remains on the queue until the end of the program. */
869 if (!server->listenning) {
870 silc_task_register(server->io_queue, server->sock,
871 silc_server_accept_new_connection,
872 (void *)server, 0, 0,
874 SILC_TASK_PRI_NORMAL);
875 server->listenning = TRUE;
878 /* Send NEW_SERVER packet to the router. We will become registered
879 to the SILC network after sending this packet. */
880 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
881 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
882 strlen(server->server_name));
883 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
884 silc_buffer_format(packet,
885 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
886 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
887 SILC_STR_UI_SHORT(strlen(server->server_name)),
888 SILC_STR_UI_XNSTRING(server->server_name,
889 strlen(server->server_name)),
892 /* Send the packet */
893 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
894 packet->data, packet->len, TRUE);
895 silc_buffer_free(packet);
896 silc_free(id_string);
898 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
900 /* Add the connected router to local server list */
901 server->standalone = FALSE;
902 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
903 SILC_ROUTER, ctx->dest_id, NULL, sock);
906 silc_free(ctx->dest_id);
907 silc_server_disconnect_remote(server, sock, "Server closed connection: "
908 "Authentication failed");
912 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
913 silc_free(sock->user_data);
914 sock->user_data = (void *)id_entry;
915 sock->type = SILC_SOCKET_TYPE_ROUTER;
916 server->id_entry->router = id_entry;
917 server->router = id_entry;
918 idata = (SilcIDListData)sock->user_data;
919 idata->registered = TRUE;
921 /* Perform keepalive. The `hb_context' will be freed automatically
922 when finally calling the silc_socket_free function. XXX hardcoded
924 hb_context = silc_calloc(1, sizeof(*hb_context));
925 hb_context->server = server;
926 silc_socket_set_heartbeat(sock, 600, hb_context,
927 silc_server_perform_heartbeat,
928 server->timeout_queue);
930 /* Register re-key timeout */
931 idata->rekey->timeout = 3600; /* XXX hardcoded */
932 idata->rekey->context = (void *)server;
933 silc_task_register(server->timeout_queue, sock->sock,
934 silc_server_rekey_callback,
935 (void *)sock, idata->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,
1101 ctx->ske->prop->group,
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1105 silc_ske_free_key_material(ctx->keymat);
1107 silc_packet_context_free(ctx->packet);
1109 silc_ske_free(ctx->ske);
1111 silc_free(ctx->dest_id);
1113 silc_task_unregister_by_callback(server->timeout_queue,
1114 silc_server_failure_callback);
1115 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1116 "Key exchange failed");
1117 server->stat.auth_failures++;
1120 silc_ske_free_key_material(ctx->keymat);
1122 /* Allocate internal context for the authentication protocol. This
1123 is sent as context for the protocol. */
1124 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1125 proto_ctx->server = (void *)server;
1126 proto_ctx->sock = sock;
1127 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1128 proto_ctx->responder = TRUE;
1129 proto_ctx->dest_id_type = ctx->dest_id_type;
1130 proto_ctx->dest_id = ctx->dest_id;
1132 /* Free old protocol as it is finished now */
1133 silc_protocol_free(protocol);
1135 silc_packet_context_free(ctx->packet);
1137 sock->protocol = NULL;
1139 /* Allocate the authentication protocol. This is allocated here
1140 but we won't start it yet. We will be receiving party of this
1141 protocol thus we will wait that connecting party will make
1142 their first move. */
1143 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1144 &sock->protocol, proto_ctx,
1145 silc_server_accept_new_connection_final);
1147 /* Register timeout task. If the protocol is not executed inside
1148 this timelimit the connection will be terminated. Currently
1149 this is 60 seconds and is hard coded limit (XXX). */
1150 proto_ctx->timeout_task =
1151 silc_task_register(server->timeout_queue, sock->sock,
1152 silc_server_timeout_remote,
1153 (void *)server, 60, 0,
1158 /* Final part of accepting new connection. The connection has now
1159 been authenticated and keys has been exchanged. We also know whether
1160 this is client or server connection. */
1162 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1164 SilcProtocol protocol = (SilcProtocol)context;
1165 SilcServerConnAuthInternalContext *ctx =
1166 (SilcServerConnAuthInternalContext *)protocol->context;
1167 SilcServer server = (SilcServer)ctx->server;
1168 SilcSocketConnection sock = ctx->sock;
1169 SilcServerHBContext hb_context;
1170 void *id_entry = NULL;
1172 SILC_LOG_DEBUG(("Start"));
1174 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1175 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1176 /* Error occured during protocol */
1177 silc_protocol_free(protocol);
1178 sock->protocol = NULL;
1180 silc_packet_context_free(ctx->packet);
1182 silc_ske_free(ctx->ske);
1184 silc_free(ctx->dest_id);
1187 sock->protocol = NULL;
1188 silc_task_unregister_by_callback(server->timeout_queue,
1189 silc_server_failure_callback);
1190 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1191 "Authentication failed");
1192 server->stat.auth_failures++;
1196 sock->type = ctx->conn_type;
1197 switch(sock->type) {
1198 case SILC_SOCKET_TYPE_CLIENT:
1200 SilcClientEntry client;
1202 SILC_LOG_DEBUG(("Remote host is client"));
1203 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1206 /* Add the client to the client ID cache. The nickname and Client ID
1207 and other information is created after we have received NEW_CLIENT
1208 packet from client. */
1209 client = silc_idlist_add_client(server->local_list,
1210 NULL, 0, NULL, NULL, NULL, NULL, sock);
1212 SILC_LOG_ERROR(("Could not add new client to cache"));
1213 silc_free(sock->user_data);
1218 server->stat.my_clients++;
1219 server->stat.clients++;
1220 if (server->server_type == SILC_ROUTER)
1221 server->stat.cell_clients++;
1223 id_entry = (void *)client;
1226 case SILC_SOCKET_TYPE_SERVER:
1227 case SILC_SOCKET_TYPE_ROUTER:
1229 SilcServerEntry new_server;
1231 SILC_LOG_DEBUG(("Remote host is %s",
1232 sock->type == SILC_SOCKET_TYPE_SERVER ?
1233 "server" : "router"));
1234 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1235 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1236 "server" : "router"));
1238 /* Add the server into server cache. The server name and Server ID
1239 is updated after we have received NEW_SERVER packet from the
1240 server. We mark ourselves as router for this server if we really
1243 silc_idlist_add_server(server->local_list, NULL,
1244 sock->type == SILC_SOCKET_TYPE_SERVER ?
1245 SILC_SERVER : SILC_ROUTER, NULL,
1246 sock->type == SILC_SOCKET_TYPE_SERVER ?
1247 server->id_entry : NULL, sock);
1249 SILC_LOG_ERROR(("Could not add new server to cache"));
1250 silc_free(sock->user_data);
1255 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1256 server->stat.my_servers++;
1258 server->stat.my_routers++;
1259 server->stat.servers++;
1261 id_entry = (void *)new_server;
1263 /* There is connection to other server now, if it is router then
1264 we will have connection to outside world. If we are router but
1265 normal server connected to us then we will remain standalone,
1266 if we are standlone. */
1267 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1268 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1269 server->standalone = FALSE;
1270 if (!server->id_entry->router) {
1271 server->id_entry->router = id_entry;
1272 server->router = id_entry;
1281 /* Add the common data structure to the ID entry. */
1283 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1285 /* Add to sockets internal pointer for fast referencing */
1286 silc_free(sock->user_data);
1287 sock->user_data = id_entry;
1289 /* Connection has been fully established now. Everything is ok. */
1290 SILC_LOG_DEBUG(("New connection authenticated"));
1292 /* Perform keepalive. The `hb_context' will be freed automatically
1293 when finally calling the silc_socket_free function. XXX hardcoded
1295 hb_context = silc_calloc(1, sizeof(*hb_context));
1296 hb_context->server = server;
1297 silc_socket_set_heartbeat(sock, 600, hb_context,
1298 silc_server_perform_heartbeat,
1299 server->timeout_queue);
1301 silc_task_unregister_by_callback(server->timeout_queue,
1302 silc_server_failure_callback);
1303 silc_protocol_free(protocol);
1305 silc_packet_context_free(ctx->packet);
1307 silc_ske_free(ctx->ske);
1309 silc_free(ctx->dest_id);
1311 sock->protocol = NULL;
1314 /* This function is used to read packets from network and send packets to
1315 network. This is usually a generic task. */
1317 SILC_TASK_CALLBACK(silc_server_packet_process)
1319 SilcServer server = (SilcServer)context;
1320 SilcSocketConnection sock = server->sockets[fd];
1321 SilcIDListData idata;
1322 SilcCipher cipher = NULL;
1323 SilcHmac hmac = NULL;
1329 SILC_LOG_DEBUG(("Processing packet"));
1331 /* Packet sending */
1333 if (type == SILC_TASK_WRITE) {
1334 /* Do not send data to disconnected connection */
1335 if (SILC_IS_DISCONNECTED(sock))
1338 server->stat.packets_sent++;
1340 if (sock->outbuf->data - sock->outbuf->head)
1341 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1343 ret = silc_server_packet_send_real(server, sock, TRUE);
1345 /* If returned -2 could not write to connection now, will do
1353 /* The packet has been sent and now it is time to set the connection
1354 back to only for input. When there is again some outgoing data
1355 available for this connection it will be set for output as well.
1356 This call clears the output setting and sets it only for input. */
1357 SILC_SET_CONNECTION_FOR_INPUT(fd);
1358 SILC_UNSET_OUTBUF_PENDING(sock);
1360 silc_buffer_clear(sock->outbuf);
1364 /* Packet receiving */
1366 /* Read some data from connection */
1367 ret = silc_packet_receive(sock);
1373 SILC_LOG_DEBUG(("Read EOF"));
1375 /* If connection is disconnecting already we will finally
1376 close the connection */
1377 if (SILC_IS_DISCONNECTING(sock)) {
1378 if (sock->user_data)
1379 silc_server_free_sock_user_data(server, sock);
1380 silc_server_close_connection(server, sock);
1384 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1385 SILC_SET_DISCONNECTING(sock);
1387 /* If the closed connection was our primary router connection the
1388 start re-connecting phase. */
1389 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1390 sock == server->router->connection)
1391 silc_task_register(server->timeout_queue, 0,
1392 silc_server_connect_to_router,
1395 SILC_TASK_PRI_NORMAL);
1397 if (sock->user_data)
1398 silc_server_free_sock_user_data(server, sock);
1399 silc_server_close_connection(server, sock);
1403 /* If connection is disconnecting or disconnected we will ignore
1405 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1406 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1410 server->stat.packets_received++;
1412 /* Get keys and stuff from ID entry */
1413 idata = (SilcIDListData)sock->user_data;
1415 idata->last_receive = time(NULL);
1416 cipher = idata->receive_key;
1420 /* Process the packet. This will call the parser that will then
1421 decrypt and parse the packet. */
1422 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1426 /* Callback function that the silc_packet_decrypt will call to make the
1427 decision whether the packet is normal or special packet. We will
1428 return TRUE if it is normal and FALSE if it is special */
1430 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1432 SilcPacketContext *packet,
1435 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1436 SilcServer server = (SilcServer)parse_ctx->context;
1438 /* Packet is normal packet, if:
1440 1) packet is private message packet and does not have private key set
1441 2) is other packet than channel message packet
1442 3) is channel message packet and remote is router and we are router
1444 all other packets are special packets
1447 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1448 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1451 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1452 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1453 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1454 server->server_type == SILC_ROUTER))
1460 /* Parses whole packet, received earlier. */
1462 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1464 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1465 SilcServer server = (SilcServer)parse_ctx->context;
1466 SilcSocketConnection sock = parse_ctx->sock;
1467 SilcPacketContext *packet = parse_ctx->packet;
1470 SILC_LOG_DEBUG(("Start"));
1472 /* Decrypt the received packet */
1473 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1474 packet->buffer, packet,
1475 silc_server_packet_decrypt_check, parse_ctx);
1480 /* Parse the packet. Packet type is returned. */
1481 ret = silc_packet_parse(packet);
1483 /* Parse the packet header in special way as this is "special"
1485 ret = silc_packet_parse_special(packet);
1488 if (ret == SILC_PACKET_NONE)
1491 /* Check that the the current client ID is same as in the client's packet. */
1492 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1493 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1494 if (client && client->id) {
1495 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1496 packet->src_id_type);
1497 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1505 if (server->server_type == SILC_ROUTER) {
1506 /* Route the packet if it is not destined to us. Other ID types but
1507 server are handled separately after processing them. */
1508 if (packet->dst_id_type == SILC_ID_SERVER &&
1509 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1510 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1512 /* Route the packet to fastest route for the destination ID */
1513 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1514 packet->dst_id_type);
1517 silc_server_packet_route(server,
1518 silc_server_route_get(server, id,
1519 packet->dst_id_type),
1525 /* Broadcast packet if it is marked as broadcast packet and it is
1526 originated from router and we are router. */
1527 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1528 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1529 silc_server_packet_broadcast(server, server->router->connection, packet);
1533 /* Parse the incoming packet type */
1534 silc_server_packet_parse_type(server, sock, packet);
1537 /* silc_buffer_clear(sock->inbuf); */
1538 silc_packet_context_free(packet);
1539 silc_free(parse_ctx);
1542 /* Parser callback called by silc_packet_receive_process. This merely
1543 registers timeout that will handle the actual parsing when appropriate. */
1545 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1547 SilcServer server = (SilcServer)parser_context->context;
1548 SilcSocketConnection sock = parser_context->sock;
1550 switch (sock->type) {
1551 case SILC_SOCKET_TYPE_CLIENT:
1552 case SILC_SOCKET_TYPE_UNKNOWN:
1553 /* Parse the packet with timeout */
1554 silc_task_register(server->timeout_queue, sock->sock,
1555 silc_server_packet_parse_real,
1556 (void *)parser_context, 0, 100000,
1558 SILC_TASK_PRI_NORMAL);
1560 case SILC_SOCKET_TYPE_SERVER:
1561 case SILC_SOCKET_TYPE_ROUTER:
1562 /* Packets from servers are parsed as soon as possible */
1563 silc_task_register(server->timeout_queue, sock->sock,
1564 silc_server_packet_parse_real,
1565 (void *)parser_context, 0, 1,
1567 SILC_TASK_PRI_NORMAL);
1574 /* Parses the packet type and calls what ever routines the packet type
1575 requires. This is done for all incoming packets. */
1577 void silc_server_packet_parse_type(SilcServer server,
1578 SilcSocketConnection sock,
1579 SilcPacketContext *packet)
1581 SilcPacketType type = packet->type;
1583 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1585 /* Parse the packet type */
1587 case SILC_PACKET_DISCONNECT:
1588 SILC_LOG_DEBUG(("Disconnect packet"));
1589 if (packet->flags & SILC_PACKET_FLAG_LIST)
1593 case SILC_PACKET_SUCCESS:
1595 * Success received for something. For now we can have only
1596 * one protocol for connection executing at once hence this
1597 * success message is for whatever protocol is executing currently.
1599 SILC_LOG_DEBUG(("Success packet"));
1600 if (packet->flags & SILC_PACKET_FLAG_LIST)
1602 if (sock->protocol) {
1603 sock->protocol->execute(server->timeout_queue, 0,
1604 sock->protocol, sock->sock, 0, 0);
1608 case SILC_PACKET_FAILURE:
1610 * Failure received for something. For now we can have only
1611 * one protocol for connection executing at once hence this
1612 * failure message is for whatever protocol is executing currently.
1614 SILC_LOG_DEBUG(("Failure packet"));
1615 if (packet->flags & SILC_PACKET_FLAG_LIST)
1617 if (sock->protocol) {
1618 SilcServerFailureContext f;
1619 f = silc_calloc(1, sizeof(*f));
1623 /* We will wait 5 seconds to process this failure packet */
1624 silc_task_register(server->timeout_queue, sock->sock,
1625 silc_server_failure_callback, (void *)f, 5, 0,
1626 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1630 case SILC_PACKET_REJECT:
1631 SILC_LOG_DEBUG(("Reject packet"));
1632 if (packet->flags & SILC_PACKET_FLAG_LIST)
1637 case SILC_PACKET_NOTIFY:
1639 * Received notify packet. Server can receive notify packets from
1640 * router. Server then relays the notify messages to clients if needed.
1642 SILC_LOG_DEBUG(("Notify packet"));
1643 if (packet->flags & SILC_PACKET_FLAG_LIST)
1644 silc_server_notify_list(server, sock, packet);
1646 silc_server_notify(server, sock, packet);
1652 case SILC_PACKET_CHANNEL_MESSAGE:
1654 * Received channel message. Channel messages are special packets
1655 * (although probably most common ones) thus they are handled
1658 SILC_LOG_DEBUG(("Channel Message packet"));
1659 if (packet->flags & SILC_PACKET_FLAG_LIST)
1661 silc_server_channel_message(server, sock, packet);
1664 case SILC_PACKET_CHANNEL_KEY:
1666 * Received key for channel. As channels are created by the router
1667 * the keys are as well. We will distribute the key to all of our
1668 * locally connected clients on the particular channel. Router
1669 * never receives this channel and thus is ignored.
1671 SILC_LOG_DEBUG(("Channel Key packet"));
1672 if (packet->flags & SILC_PACKET_FLAG_LIST)
1674 silc_server_channel_key(server, sock, packet);
1680 case SILC_PACKET_COMMAND:
1682 * Recived command. Processes the command request and allocates the
1683 * command context and calls the command.
1685 SILC_LOG_DEBUG(("Command packet"));
1686 if (packet->flags & SILC_PACKET_FLAG_LIST)
1688 silc_server_command_process(server, sock, packet);
1691 case SILC_PACKET_COMMAND_REPLY:
1693 * Received command reply packet. Received command reply to command. It
1694 * may be reply to command sent by us or reply to command sent by client
1695 * that we've routed further.
1697 SILC_LOG_DEBUG(("Command Reply packet"));
1698 if (packet->flags & SILC_PACKET_FLAG_LIST)
1700 silc_server_command_reply(server, sock, packet);
1704 * Private Message packets
1706 case SILC_PACKET_PRIVATE_MESSAGE:
1708 * Received private message packet. The packet is coming from either
1711 SILC_LOG_DEBUG(("Private Message packet"));
1712 if (packet->flags & SILC_PACKET_FLAG_LIST)
1714 silc_server_private_message(server, sock, packet);
1717 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1719 * Private message key packet.
1721 if (packet->flags & SILC_PACKET_FLAG_LIST)
1723 silc_server_private_message_key(server, sock, packet);
1727 * Key Exchange protocol packets
1729 case SILC_PACKET_KEY_EXCHANGE:
1730 SILC_LOG_DEBUG(("KE packet"));
1731 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 if (sock->protocol && sock->protocol->protocol &&
1735 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1737 SilcServerKEInternalContext *proto_ctx =
1738 (SilcServerKEInternalContext *)sock->protocol->context;
1740 proto_ctx->packet = silc_packet_context_dup(packet);
1742 /* Let the protocol handle the packet */
1743 sock->protocol->execute(server->timeout_queue, 0,
1744 sock->protocol, sock->sock, 0, 100000);
1746 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1747 "protocol active, packet dropped."));
1749 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1753 case SILC_PACKET_KEY_EXCHANGE_1:
1754 SILC_LOG_DEBUG(("KE 1 packet"));
1755 if (packet->flags & SILC_PACKET_FLAG_LIST)
1758 if (sock->protocol && sock->protocol->protocol &&
1759 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1760 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1762 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1763 SilcServerRekeyInternalContext *proto_ctx =
1764 (SilcServerRekeyInternalContext *)sock->protocol->context;
1766 if (proto_ctx->packet)
1767 silc_packet_context_free(proto_ctx->packet);
1769 proto_ctx->packet = silc_packet_context_dup(packet);
1771 /* Let the protocol handle the packet */
1772 sock->protocol->execute(server->timeout_queue, 0,
1773 sock->protocol, sock->sock, 0, 0);
1775 SilcServerKEInternalContext *proto_ctx =
1776 (SilcServerKEInternalContext *)sock->protocol->context;
1778 if (proto_ctx->packet)
1779 silc_packet_context_free(proto_ctx->packet);
1781 proto_ctx->packet = silc_packet_context_dup(packet);
1782 proto_ctx->dest_id_type = packet->src_id_type;
1783 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1784 packet->src_id_type);
1785 if (!proto_ctx->dest_id)
1788 /* Let the protocol handle the packet */
1789 sock->protocol->execute(server->timeout_queue, 0,
1790 sock->protocol, sock->sock,
1794 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1795 "protocol active, packet dropped."));
1799 case SILC_PACKET_KEY_EXCHANGE_2:
1800 SILC_LOG_DEBUG(("KE 2 packet"));
1801 if (packet->flags & SILC_PACKET_FLAG_LIST)
1804 if (sock->protocol && sock->protocol->protocol &&
1805 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1806 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1808 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1809 SilcServerRekeyInternalContext *proto_ctx =
1810 (SilcServerRekeyInternalContext *)sock->protocol->context;
1812 if (proto_ctx->packet)
1813 silc_packet_context_free(proto_ctx->packet);
1815 proto_ctx->packet = silc_packet_context_dup(packet);
1817 /* Let the protocol handle the packet */
1818 sock->protocol->execute(server->timeout_queue, 0,
1819 sock->protocol, sock->sock, 0, 0);
1821 SilcServerKEInternalContext *proto_ctx =
1822 (SilcServerKEInternalContext *)sock->protocol->context;
1824 if (proto_ctx->packet)
1825 silc_packet_context_free(proto_ctx->packet);
1827 proto_ctx->packet = silc_packet_context_dup(packet);
1828 proto_ctx->dest_id_type = packet->src_id_type;
1829 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1830 packet->src_id_type);
1831 if (!proto_ctx->dest_id)
1834 /* Let the protocol handle the packet */
1835 sock->protocol->execute(server->timeout_queue, 0,
1836 sock->protocol, sock->sock,
1840 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1841 "protocol active, packet dropped."));
1845 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1847 * Connection authentication request packet. When we receive this packet
1848 * we will send to the other end information about our mandatory
1849 * authentication method for the connection. This packet maybe received
1852 SILC_LOG_DEBUG(("Connection authentication request packet"));
1853 if (packet->flags & SILC_PACKET_FLAG_LIST)
1855 silc_server_connection_auth_request(server, sock, packet);
1859 * Connection Authentication protocol packets
1861 case SILC_PACKET_CONNECTION_AUTH:
1862 /* Start of the authentication protocol. We receive here the
1863 authentication data and will verify it. */
1864 SILC_LOG_DEBUG(("Connection auth packet"));
1865 if (packet->flags & SILC_PACKET_FLAG_LIST)
1868 if (sock->protocol && sock->protocol->protocol->type
1869 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1871 SilcServerConnAuthInternalContext *proto_ctx =
1872 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1874 proto_ctx->packet = silc_packet_context_dup(packet);
1876 /* Let the protocol handle the packet */
1877 sock->protocol->execute(server->timeout_queue, 0,
1878 sock->protocol, sock->sock, 0, 0);
1880 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1881 "protocol active, packet dropped."));
1885 case SILC_PACKET_NEW_ID:
1887 * Received New ID packet. This includes some new ID that has been
1888 * created. It may be for client, server or channel. This is the way
1889 * to distribute information about new registered entities in the
1892 SILC_LOG_DEBUG(("New ID packet"));
1893 if (packet->flags & SILC_PACKET_FLAG_LIST)
1894 silc_server_new_id_list(server, sock, packet);
1896 silc_server_new_id(server, sock, packet);
1899 case SILC_PACKET_NEW_CLIENT:
1901 * Received new client packet. This includes client information that
1902 * we will use to create initial client ID. After creating new
1903 * ID we will send it to the client.
1905 SILC_LOG_DEBUG(("New Client packet"));
1906 if (packet->flags & SILC_PACKET_FLAG_LIST)
1908 silc_server_new_client(server, sock, packet);
1911 case SILC_PACKET_NEW_SERVER:
1913 * Received new server packet. This includes Server ID and some other
1914 * information that we may save. This is received after server has
1917 SILC_LOG_DEBUG(("New Server packet"));
1918 if (packet->flags & SILC_PACKET_FLAG_LIST)
1920 silc_server_new_server(server, sock, packet);
1923 case SILC_PACKET_NEW_CHANNEL:
1925 * Received new channel packet. Information about new channel in the
1926 * network are distributed using this packet.
1928 SILC_LOG_DEBUG(("New Channel packet"));
1929 if (packet->flags & SILC_PACKET_FLAG_LIST)
1930 silc_server_new_channel_list(server, sock, packet);
1932 silc_server_new_channel(server, sock, packet);
1935 case SILC_PACKET_HEARTBEAT:
1937 * Received heartbeat.
1939 SILC_LOG_DEBUG(("Heartbeat packet"));
1940 if (packet->flags & SILC_PACKET_FLAG_LIST)
1944 case SILC_PACKET_KEY_AGREEMENT:
1946 * Received heartbeat.
1948 SILC_LOG_DEBUG(("Key agreement packet"));
1949 if (packet->flags & SILC_PACKET_FLAG_LIST)
1951 silc_server_key_agreement(server, sock, packet);
1954 case SILC_PACKET_REKEY:
1956 * Received re-key packet. The sender wants to regenerate the session
1959 SILC_LOG_DEBUG(("Re-key packet"));
1960 if (packet->flags & SILC_PACKET_FLAG_LIST)
1962 silc_server_rekey(server, sock, packet);
1965 case SILC_PACKET_REKEY_DONE:
1967 * The re-key is done.
1969 SILC_LOG_DEBUG(("Re-key done packet"));
1970 if (packet->flags & SILC_PACKET_FLAG_LIST)
1973 if (sock->protocol && sock->protocol->protocol &&
1974 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1976 SilcServerRekeyInternalContext *proto_ctx =
1977 (SilcServerRekeyInternalContext *)sock->protocol->context;
1979 if (proto_ctx->packet)
1980 silc_packet_context_free(proto_ctx->packet);
1982 proto_ctx->packet = silc_packet_context_dup(packet);
1984 /* Let the protocol handle the packet */
1985 sock->protocol->execute(server->timeout_queue, 0,
1986 sock->protocol, sock->sock,
1989 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1990 "protocol active, packet dropped."));
1995 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2001 /* Creates connection to a remote router. */
2003 void silc_server_create_connection(SilcServer server,
2004 char *remote_host, uint32 port)
2006 SilcServerConnection sconn;
2008 /* Allocate connection object for hold connection specific stuff. */
2009 sconn = silc_calloc(1, sizeof(*sconn));
2010 sconn->server = server;
2011 sconn->remote_host = strdup(remote_host);
2012 sconn->remote_port = port;
2014 silc_task_register(server->timeout_queue, 0,
2015 silc_server_connect_router,
2016 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2017 SILC_TASK_PRI_NORMAL);
2020 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2022 silc_socket_free((SilcSocketConnection)context);
2025 /* Closes connection to socket connection */
2027 void silc_server_close_connection(SilcServer server,
2028 SilcSocketConnection sock)
2030 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
2032 /* We won't listen for this connection anymore */
2033 silc_schedule_unset_listen_fd(sock->sock);
2035 /* Unregister all tasks */
2036 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2037 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2039 /* Close the actual connection */
2040 silc_net_close_connection(sock->sock);
2041 server->sockets[sock->sock] = NULL;
2043 silc_task_register(server->timeout_queue, 0,
2044 silc_server_close_connection_final,
2045 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2046 SILC_TASK_PRI_NORMAL);
2049 /* Sends disconnect message to remote connection and disconnects the
2052 void silc_server_disconnect_remote(SilcServer server,
2053 SilcSocketConnection sock,
2054 const char *fmt, ...)
2057 unsigned char buf[4096];
2062 memset(buf, 0, sizeof(buf));
2064 vsprintf(buf, fmt, ap);
2067 SILC_LOG_DEBUG(("Disconnecting remote host"));
2069 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2071 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2072 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2073 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2076 /* Notify remote end that the conversation is over. The notify message
2077 is tried to be sent immediately. */
2078 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2079 buf, strlen(buf), TRUE);
2081 /* Mark the connection to be disconnected */
2082 SILC_SET_DISCONNECTED(sock);
2083 silc_server_close_connection(server, sock);
2088 SilcClientEntry client;
2089 } *FreeClientInternal;
2091 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2093 FreeClientInternal i = (FreeClientInternal)context;
2095 silc_idlist_del_data(i->client);
2096 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2100 /* Frees client data and notifies about client's signoff. */
2102 void silc_server_free_client_data(SilcServer server,
2103 SilcSocketConnection sock,
2104 SilcClientEntry client,
2108 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2110 /* If there is pending outgoing data for the client then purge it
2111 to the network before removing the client entry. */
2112 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2113 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2114 server->stat.packets_sent++;
2116 if (sock->outbuf->data - sock->outbuf->head)
2117 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2119 silc_server_packet_send_real(server, sock, TRUE);
2121 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2122 SILC_UNSET_OUTBUF_PENDING(sock);
2123 silc_buffer_clear(sock->outbuf);
2126 /* Send SIGNOFF notify to routers. */
2127 if (notify && !server->standalone && server->router)
2128 silc_server_send_notify_signoff(server, server->router->connection,
2129 server->server_type == SILC_SERVER ?
2130 FALSE : TRUE, client->id,
2131 SILC_ID_CLIENT_LEN, signoff);
2133 /* Remove client from all channels */
2135 silc_server_remove_from_channels(server, NULL, client,
2136 TRUE, signoff, TRUE);
2138 silc_server_remove_from_channels(server, NULL, client,
2139 FALSE, NULL, FALSE);
2141 /* We will not delete the client entry right away. We will take it
2142 into history (for WHOWAS command) for 5 minutes */
2145 silc_task_register(server->timeout_queue, 0,
2146 silc_server_free_client_data_timeout,
2148 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2149 client->data.registered = FALSE;
2151 /* Free the client entry and everything in it */
2152 server->stat.my_clients--;
2153 server->stat.clients--;
2154 if (server->server_type == SILC_ROUTER)
2155 server->stat.cell_clients--;
2158 /* Frees user_data pointer from socket connection object. This also sends
2159 appropriate notify packets to the network to inform about leaving
2162 void silc_server_free_sock_user_data(SilcServer server,
2163 SilcSocketConnection sock)
2165 SILC_LOG_DEBUG(("Start"));
2167 switch(sock->type) {
2168 case SILC_SOCKET_TYPE_CLIENT:
2170 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2171 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2174 case SILC_SOCKET_TYPE_SERVER:
2175 case SILC_SOCKET_TYPE_ROUTER:
2177 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2179 /* Free all client entries that this server owns as they will
2180 become invalid now as well. */
2181 silc_server_remove_clients_by_server(server, user_data, TRUE);
2183 /* If this was our primary router connection then we're lost to
2184 the outside world. */
2185 if (server->router == user_data) {
2186 server->id_entry->router = NULL;
2187 server->router = NULL;
2188 server->standalone = TRUE;
2191 /* Free the server entry */
2192 silc_idlist_del_data(user_data);
2193 silc_idlist_del_server(server->local_list, user_data);
2194 server->stat.my_servers--;
2195 server->stat.servers--;
2196 if (server->server_type == SILC_ROUTER)
2197 server->stat.cell_servers--;
2202 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2204 silc_idlist_del_data(user_data);
2205 silc_free(user_data);
2210 sock->user_data = NULL;
2213 /* This function is used to remove all client entries by the server `entry'.
2214 This is called when the connection is lost to the server. In this case
2215 we must invalidate all the client entries owned by the server `entry'.
2216 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2217 distributed to our local clients. */
2219 int silc_server_remove_clients_by_server(SilcServer server,
2220 SilcServerEntry entry,
2223 SilcIDCacheList list = NULL;
2224 SilcIDCacheEntry id_cache = NULL;
2225 SilcClientEntry client = NULL;
2227 SilcClientEntry *clients = NULL;
2228 uint32 clients_c = 0;
2229 unsigned char **argv = NULL;
2230 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2233 SILC_LOG_DEBUG(("Start"));
2235 if (server_signoff) {
2236 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2237 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2238 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2239 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2240 argv[argc] = idp->data;
2241 argv_lens[argc] = idp->len;
2242 argv_types[argc] = argc + 1;
2244 silc_buffer_free(idp);
2247 if (silc_idcache_find_by_id(server->local_list->clients,
2248 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2250 if (silc_idcache_list_first(list, &id_cache)) {
2252 client = (SilcClientEntry)id_cache->context;
2253 if (client->data.registered == FALSE) {
2254 if (!silc_idcache_list_next(list, &id_cache))
2260 if (client->router != entry) {
2261 if (server_signoff && client->connection) {
2262 clients = silc_realloc(clients,
2263 sizeof(*clients) * (clients_c + 1));
2264 clients[clients_c] = client;
2268 if (!silc_idcache_list_next(list, &id_cache))
2274 if (server_signoff) {
2275 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2276 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2277 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2279 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2281 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2282 memcpy(argv[argc], idp->data, idp->len);
2283 argv_lens[argc] = idp->len;
2284 argv_types[argc] = argc + 1;
2286 silc_buffer_free(idp);
2289 /* Remove the client entry */
2290 silc_server_remove_from_channels(server, NULL, client, FALSE,
2292 silc_idlist_del_client(server->local_list, client);
2294 if (!silc_idcache_list_next(list, &id_cache))
2298 silc_idcache_list_free(list);
2301 if (silc_idcache_find_by_id(server->global_list->clients,
2302 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2304 if (silc_idcache_list_first(list, &id_cache)) {
2306 client = (SilcClientEntry)id_cache->context;
2307 if (client->data.registered == FALSE) {
2308 if (!silc_idcache_list_next(list, &id_cache))
2314 if (client->router != entry) {
2315 if (server_signoff && client->connection) {
2316 clients = silc_realloc(clients,
2317 sizeof(*clients) * (clients_c + 1));
2318 clients[clients_c] = client;
2322 if (!silc_idcache_list_next(list, &id_cache))
2328 if (server_signoff) {
2329 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2330 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2331 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2333 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2335 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2336 memcpy(argv[argc], idp->data, idp->len);
2337 argv_lens[argc] = idp->len;
2338 argv_types[argc] = argc + 1;
2340 silc_buffer_free(idp);
2343 /* Remove the client entry */
2344 silc_server_remove_from_channels(server, NULL, client, FALSE,
2346 silc_idlist_del_client(server->global_list, client);
2348 if (!silc_idcache_list_next(list, &id_cache))
2352 silc_idcache_list_free(list);
2355 /* Send the SERVER_SIGNOFF notify */
2356 if (server_signoff) {
2359 /* Send SERVER_SIGNOFF notify to our primary router */
2360 if (!server->standalone && server->router) {
2361 args = silc_argument_payload_encode(1, argv, argv_lens,
2363 silc_server_send_notify_args(server,
2364 server->router->connection,
2365 server->server_type ==
2366 SILC_SERVER ? FALSE : TRUE,
2367 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2369 silc_buffer_free(args);
2372 args = silc_argument_payload_encode(argc, argv, argv_lens,
2374 /* Send to local clients */
2375 for (i = 0; i < clients_c; i++) {
2376 silc_server_send_notify_args(server, clients[i]->connection,
2377 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2382 silc_buffer_free(args);
2384 silc_free(argv_lens);
2385 silc_free(argv_types);
2391 /* Checks whether given channel has global users. If it does this returns
2392 TRUE and FALSE if there is only locally connected clients on the channel. */
2394 int silc_server_channel_has_global(SilcChannelEntry channel)
2396 SilcChannelClientEntry chl;
2398 silc_list_start(channel->user_list);
2399 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2400 if (chl->client->router)
2407 /* Checks whether given channel has locally connected users. If it does this
2408 returns TRUE and FALSE if there is not one locally connected client. */
2410 int silc_server_channel_has_local(SilcChannelEntry channel)
2412 SilcChannelClientEntry chl;
2414 silc_list_start(channel->user_list);
2415 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2416 if (!chl->client->router)
2423 /* Removes client from all channels it has joined. This is used when client
2424 connection is disconnected. If the client on a channel is last, the
2425 channel is removed as well. This sends the SIGNOFF notify types. */
2427 void silc_server_remove_from_channels(SilcServer server,
2428 SilcSocketConnection sock,
2429 SilcClientEntry client,
2431 char *signoff_message,
2434 SilcChannelEntry channel;
2435 SilcChannelClientEntry chl;
2438 SILC_LOG_DEBUG(("Start"));
2440 if (!client || !client->id)
2443 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2445 /* Remove the client from all channels. The client is removed from
2446 the channels' user list. */
2447 silc_list_start(client->channels);
2448 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2449 channel = chl->channel;
2451 /* Remove channel from client's channel list */
2452 silc_list_del(client->channels, chl);
2454 /* Remove channel if there is no users anymore */
2455 if (server->server_type == SILC_ROUTER &&
2456 silc_list_count(channel->user_list) < 2) {
2457 server->stat.my_channels--;
2460 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2462 if (channel->founder_key) {
2463 /* The founder auth data exists, do not remove the channel entry */
2464 SilcChannelClientEntry chl2;
2468 silc_list_start(channel->user_list);
2469 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2470 silc_list_del(chl2->client->channels, chl2);
2471 silc_list_del(channel->user_list, chl2);
2477 if (!silc_idlist_del_channel(server->local_list, channel))
2478 silc_idlist_del_channel(server->global_list, channel);
2482 /* Remove client from channel's client list */
2483 silc_list_del(channel->user_list, chl);
2485 server->stat.my_chanclients--;
2487 /* If there is no global users on the channel anymore mark the channel
2488 as local channel. */
2489 if (server->server_type == SILC_SERVER &&
2490 !silc_server_channel_has_global(channel))
2491 channel->global_users = FALSE;
2493 /* If there is not at least one local user on the channel then we don't
2494 need the channel entry anymore, we can remove it safely. */
2495 if (server->server_type == SILC_SERVER &&
2496 !silc_server_channel_has_local(channel)) {
2497 /* Notify about leaving client if this channel has global users. */
2498 if (notify && channel->global_users)
2499 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2500 SILC_NOTIFY_TYPE_SIGNOFF,
2501 signoff_message ? 2 : 1,
2502 clidp->data, clidp->len,
2503 signoff_message, signoff_message ?
2504 strlen(signoff_message) : 0);
2506 server->stat.my_channels--;
2509 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2511 if (channel->founder_key) {
2512 /* The founder auth data exists, do not remove the channel entry */
2513 SilcChannelClientEntry chl2;
2517 silc_list_start(channel->user_list);
2518 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2519 silc_list_del(chl2->client->channels, chl2);
2520 silc_list_del(channel->user_list, chl2);
2526 if (!silc_idlist_del_channel(server->local_list, channel))
2527 silc_idlist_del_channel(server->global_list, channel);
2531 /* Send notify to channel about client leaving SILC and thus
2532 the entire channel. */
2534 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2535 SILC_NOTIFY_TYPE_SIGNOFF,
2536 signoff_message ? 2 : 1,
2537 clidp->data, clidp->len,
2538 signoff_message, signoff_message ?
2539 strlen(signoff_message) : 0);
2541 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2542 /* Re-generate channel key */
2543 silc_server_create_channel_key(server, channel, 0);
2545 /* Send the channel key to the channel. The key of course is not sent
2546 to the client who was removed from the channel. */
2547 silc_server_send_channel_key(server, client->connection, channel,
2548 server->server_type == SILC_ROUTER ?
2549 FALSE : !server->standalone);
2553 silc_buffer_free(clidp);
2556 /* Removes client from one channel. This is used for example when client
2557 calls LEAVE command to remove itself from the channel. Returns TRUE
2558 if channel still exists and FALSE if the channel is removed when
2559 last client leaves the channel. If `notify' is FALSE notify messages
2562 int silc_server_remove_from_one_channel(SilcServer server,
2563 SilcSocketConnection sock,
2564 SilcChannelEntry channel,
2565 SilcClientEntry client,
2568 SilcChannelEntry ch;
2569 SilcChannelClientEntry chl;
2572 SILC_LOG_DEBUG(("Start"));
2574 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2576 /* Remove the client from the channel. The client is removed from
2577 the channel's user list. */
2578 silc_list_start(client->channels);
2579 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2580 if (chl->channel != channel)
2585 /* Remove channel from client's channel list */
2586 silc_list_del(client->channels, chl);
2588 /* Remove channel if there is no users anymore */
2589 if (server->server_type == SILC_ROUTER &&
2590 silc_list_count(channel->user_list) < 2) {
2592 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2593 if (!silc_idlist_del_channel(server->local_list, channel))
2594 silc_idlist_del_channel(server->global_list, channel);
2595 silc_buffer_free(clidp);
2596 server->stat.my_channels--;
2600 /* Remove client from channel's client list */
2601 silc_list_del(channel->user_list, chl);
2603 server->stat.my_chanclients--;
2605 /* If there is no global users on the channel anymore mark the channel
2606 as local channel. */
2607 if (server->server_type == SILC_SERVER &&
2608 !silc_server_channel_has_global(channel))
2609 channel->global_users = FALSE;
2611 /* If there is not at least one local user on the channel then we don't
2612 need the channel entry anymore, we can remove it safely. */
2613 if (server->server_type == SILC_SERVER &&
2614 !silc_server_channel_has_local(channel)) {
2615 /* Notify about leaving client if this channel has global users. */
2616 if (notify && channel->global_users)
2617 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2618 SILC_NOTIFY_TYPE_LEAVE, 1,
2619 clidp->data, clidp->len);
2621 server->stat.my_channels--;
2622 silc_buffer_free(clidp);
2625 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2627 if (channel->founder_key) {
2628 /* The founder auth data exists, do not remove the channel entry */
2629 SilcChannelClientEntry chl2;
2633 silc_list_start(channel->user_list);
2634 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2635 silc_list_del(chl2->client->channels, chl2);
2636 silc_list_del(channel->user_list, chl2);
2642 if (!silc_idlist_del_channel(server->local_list, channel))
2643 silc_idlist_del_channel(server->global_list, channel);
2647 /* Send notify to channel about client leaving the channel */
2649 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2650 SILC_NOTIFY_TYPE_LEAVE, 1,
2651 clidp->data, clidp->len);
2655 silc_buffer_free(clidp);
2659 /* Returns TRUE if the given client is on the channel. FALSE if not.
2660 This works because we assure that the user list on the channel is
2661 always in up to date thus we can only check the channel list from
2662 `client' which is faster than checking the user list from `channel'. */
2664 int silc_server_client_on_channel(SilcClientEntry client,
2665 SilcChannelEntry channel)
2667 SilcChannelClientEntry chl;
2669 if (!client || !channel)
2672 silc_list_start(client->channels);
2673 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2674 if (chl->channel == channel)
2680 /* Timeout callback. This is called if connection is idle or for some
2681 other reason is not responding within some period of time. This
2682 disconnects the remote end. */
2684 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2686 SilcServer server = (SilcServer)context;
2687 SilcSocketConnection sock = server->sockets[fd];
2692 if (sock->user_data)
2693 silc_server_free_sock_user_data(server, sock);
2695 silc_server_disconnect_remote(server, sock,
2696 "Server closed connection: "
2697 "Connection timeout");
2700 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2701 function may be used only by router. In real SILC network all channels
2702 are created by routers thus this function is never used by normal
2705 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2706 SilcServerID *router_id,
2712 SilcChannelID *channel_id;
2713 SilcChannelEntry entry;
2717 SILC_LOG_DEBUG(("Creating new channel"));
2720 cipher = "aes-256-cbc";
2722 hmac = "hmac-sha1-96";
2724 /* Allocate cipher */
2725 if (!silc_cipher_alloc(cipher, &key))
2729 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2730 silc_cipher_free(key);
2734 channel_name = strdup(channel_name);
2736 /* Create the channel */
2737 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2738 entry = silc_idlist_add_channel(server->local_list, channel_name,
2739 SILC_CHANNEL_MODE_NONE, channel_id,
2740 NULL, key, newhmac);
2742 silc_free(channel_name);
2746 entry->cipher = strdup(cipher);
2747 entry->hmac_name = strdup(hmac);
2749 /* Now create the actual key material */
2750 silc_server_create_channel_key(server, entry,
2751 silc_cipher_get_key_len(key) / 8);
2753 /* Notify other routers about the new channel. We send the packet
2754 to our primary route. */
2755 if (broadcast && server->standalone == FALSE)
2756 silc_server_send_new_channel(server, server->router->connection, TRUE,
2757 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2760 server->stat.my_channels++;
2765 /* Same as above but creates the channel with Channel ID `channel_id. */
2768 silc_server_create_new_channel_with_id(SilcServer server,
2772 SilcChannelID *channel_id,
2775 SilcChannelEntry entry;
2779 SILC_LOG_DEBUG(("Creating new channel"));
2782 cipher = "aes-256-cbc";
2784 hmac = "hmac-sha1-96";
2786 /* Allocate cipher */
2787 if (!silc_cipher_alloc(cipher, &key))
2791 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2792 silc_cipher_free(key);
2796 channel_name = strdup(channel_name);
2798 /* Create the channel */
2799 entry = silc_idlist_add_channel(server->local_list, channel_name,
2800 SILC_CHANNEL_MODE_NONE, channel_id,
2801 NULL, key, newhmac);
2803 silc_free(channel_name);
2807 /* Now create the actual key material */
2808 silc_server_create_channel_key(server, entry,
2809 silc_cipher_get_key_len(key) / 8);
2811 /* Notify other routers about the new channel. We send the packet
2812 to our primary route. */
2813 if (broadcast && server->standalone == FALSE)
2814 silc_server_send_new_channel(server, server->router->connection, TRUE,
2815 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2818 server->stat.my_channels++;
2823 /* Channel's key re-key timeout callback. */
2825 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2827 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2828 SilcServer server = (SilcServer)rekey->context;
2830 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2831 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2833 silc_task_register(server->timeout_queue, 0,
2834 silc_server_channel_key_rekey,
2835 (void *)rekey, 3600, 0,
2837 SILC_TASK_PRI_NORMAL);
2840 /* Generates new channel key. This is used to create the initial channel key
2841 but also to re-generate new key for channel. If `key_len' is provided
2842 it is the bytes of the key length. */
2844 void silc_server_create_channel_key(SilcServer server,
2845 SilcChannelEntry channel,
2849 unsigned char channel_key[32], hash[32];
2852 SILC_LOG_DEBUG(("Generating channel key"));
2854 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2855 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2859 if (!channel->channel_key)
2860 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2865 else if (channel->key_len)
2866 len = channel->key_len / 8;
2868 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2870 /* Create channel key */
2871 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2874 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2876 /* Remove old key if exists */
2878 memset(channel->key, 0, channel->key_len / 8);
2879 silc_free(channel->key);
2883 channel->key_len = len * 8;
2884 channel->key = silc_calloc(len, sizeof(*channel->key));
2885 memcpy(channel->key, channel_key, len);
2886 memset(channel_key, 0, sizeof(channel_key));
2888 /* Generate HMAC key from the channel key data and set it */
2890 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2891 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2892 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2893 memset(hash, 0, sizeof(hash));
2895 if (server->server_type == SILC_ROUTER) {
2896 if (!channel->rekey)
2897 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2898 channel->rekey->context = (void *)server;
2899 channel->rekey->channel = channel;
2900 channel->rekey->key_len = key_len;
2902 silc_task_unregister_by_callback(server->timeout_queue,
2903 silc_server_channel_key_rekey);
2904 silc_task_register(server->timeout_queue, 0,
2905 silc_server_channel_key_rekey,
2906 (void *)channel->rekey, 3600, 0,
2908 SILC_TASK_PRI_NORMAL);
2912 /* Saves the channel key found in the encoded `key_payload' buffer. This
2913 function is used when we receive Channel Key Payload and also when we're
2914 processing JOIN command reply. Returns entry to the channel. */
2916 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2917 SilcBuffer key_payload,
2918 SilcChannelEntry channel)
2920 SilcChannelKeyPayload payload = NULL;
2921 SilcChannelID *id = NULL;
2922 unsigned char *tmp, hash[32];
2926 SILC_LOG_DEBUG(("Start"));
2928 /* Decode channel key payload */
2929 payload = silc_channel_key_payload_parse(key_payload);
2931 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2936 /* Get the channel entry */
2939 /* Get channel ID */
2940 tmp = silc_channel_key_get_id(payload, &tmp_len);
2941 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2947 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2949 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2951 SILC_LOG_ERROR(("Received key for non-existent channel"));
2957 tmp = silc_channel_key_get_key(payload, &tmp_len);
2963 cipher = silc_channel_key_get_cipher(payload, NULL);
2969 /* Remove old key if exists */
2971 memset(channel->key, 0, channel->key_len / 8);
2972 silc_free(channel->key);
2973 silc_cipher_free(channel->channel_key);
2976 /* Create new cipher */
2977 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2982 if (channel->cipher)
2983 silc_free(channel->cipher);
2984 channel->cipher = strdup(cipher);
2987 channel->key_len = tmp_len * 8;
2988 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2989 memcpy(channel->key, tmp, tmp_len);
2990 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2992 /* Generate HMAC key from the channel key data and set it */
2994 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2995 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2996 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2998 memset(hash, 0, sizeof(hash));
2999 memset(tmp, 0, tmp_len);
3001 if (server->server_type == SILC_ROUTER) {
3002 if (!channel->rekey)
3003 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3004 channel->rekey->context = (void *)server;
3005 channel->rekey->channel = channel;
3007 silc_task_unregister_by_callback(server->timeout_queue,
3008 silc_server_channel_key_rekey);
3009 silc_task_register(server->timeout_queue, 0,
3010 silc_server_channel_key_rekey,
3011 (void *)channel->rekey, 3600, 0,
3013 SILC_TASK_PRI_NORMAL);
3020 silc_channel_key_payload_free(payload);
3025 /* Heartbeat callback. This function is set as argument for the
3026 silc_socket_set_heartbeat function. The library will call this function
3027 at the set time interval. */
3029 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3032 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3034 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3037 /* Send the heartbeat */
3038 silc_server_send_heartbeat(hb->server, sock);
3041 /* Returns assembled of all servers in the given ID list. The packet's
3042 form is dictated by the New ID payload. */
3044 static void silc_server_announce_get_servers(SilcServer server,
3046 SilcBuffer *servers)
3048 SilcIDCacheList list;
3049 SilcIDCacheEntry id_cache;
3050 SilcServerEntry entry;
3053 /* Go through all clients in the list */
3054 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3055 SILC_ID_SERVER, &list)) {
3056 if (silc_idcache_list_first(list, &id_cache)) {
3058 entry = (SilcServerEntry)id_cache->context;
3060 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3062 *servers = silc_buffer_realloc(*servers,
3064 (*servers)->truelen + idp->len :
3066 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3067 silc_buffer_put(*servers, idp->data, idp->len);
3068 silc_buffer_pull(*servers, idp->len);
3069 silc_buffer_free(idp);
3071 if (!silc_idcache_list_next(list, &id_cache))
3076 silc_idcache_list_free(list);
3080 /* This function is used by router to announce existing servers to our
3081 primary router when we've connected to it. */
3083 void silc_server_announce_servers(SilcServer server)
3085 SilcBuffer servers = NULL;
3087 SILC_LOG_DEBUG(("Announcing servers"));
3089 /* Get servers in local list */
3090 silc_server_announce_get_servers(server, server->local_list, &servers);
3092 /* Get servers in global list */
3093 silc_server_announce_get_servers(server, server->global_list, &servers);
3096 silc_buffer_push(servers, servers->data - servers->head);
3097 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3099 /* Send the packet */
3100 silc_server_packet_send(server, server->router->connection,
3101 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3102 servers->data, servers->len, TRUE);
3104 silc_buffer_free(servers);
3108 /* Returns assembled packet of all clients in the given ID list. The
3109 packet's form is dictated by the New ID Payload. */
3111 static void silc_server_announce_get_clients(SilcServer server,
3113 SilcBuffer *clients)
3115 SilcIDCacheList list;
3116 SilcIDCacheEntry id_cache;
3117 SilcClientEntry client;
3120 /* Go through all clients in the list */
3121 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3122 SILC_ID_CLIENT, &list)) {
3123 if (silc_idcache_list_first(list, &id_cache)) {
3125 client = (SilcClientEntry)id_cache->context;
3127 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3129 *clients = silc_buffer_realloc(*clients,
3131 (*clients)->truelen + idp->len :
3133 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3134 silc_buffer_put(*clients, idp->data, idp->len);
3135 silc_buffer_pull(*clients, idp->len);
3136 silc_buffer_free(idp);
3138 if (!silc_idcache_list_next(list, &id_cache))
3143 silc_idcache_list_free(list);
3147 /* This function is used to announce our existing clients to our router
3148 when we've connected to it. */
3150 void silc_server_announce_clients(SilcServer server)
3152 SilcBuffer clients = NULL;
3154 SILC_LOG_DEBUG(("Announcing clients"));
3156 /* Get clients in local list */
3157 silc_server_announce_get_clients(server, server->local_list,
3160 /* As router we announce our global list as well */
3161 if (server->server_type == SILC_ROUTER)
3162 silc_server_announce_get_clients(server, server->global_list,
3166 silc_buffer_push(clients, clients->data - clients->head);
3167 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3169 /* Send the packet */
3170 silc_server_packet_send(server, server->router->connection,
3171 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3172 clients->data, clients->len, TRUE);
3174 silc_buffer_free(clients);
3179 silc_server_announce_encode_join(uint32 argc, ...)
3184 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3187 /* Returns assembled packets for channel users of the `channel'. */
3189 void silc_server_announce_get_channel_users(SilcServer server,
3190 SilcChannelEntry channel,
3191 SilcBuffer *channel_users)
3193 SilcChannelClientEntry chl;
3194 SilcBuffer chidp, clidp;
3198 SILC_LOG_DEBUG(("Start"));
3200 /* Now find all users on the channel */
3201 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3202 silc_list_start(channel->user_list);
3203 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3204 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3205 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3206 chidp->data, chidp->len);
3209 silc_buffer_realloc(*channel_users,
3211 (*channel_users)->truelen + len : len));
3212 silc_buffer_pull_tail(*channel_users,
3213 ((*channel_users)->end -
3214 (*channel_users)->data));
3216 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3217 silc_buffer_pull(*channel_users, len);
3218 silc_buffer_free(clidp);
3219 silc_buffer_free(tmp);
3221 silc_buffer_free(chidp);
3224 /* Returns assembled packets for all channels and users on those channels
3225 from the given ID List. The packets are in the form dictated by the
3226 New Channel and New Channel User payloads. */
3228 void silc_server_announce_get_channels(SilcServer server,
3230 SilcBuffer *channels,
3231 SilcBuffer *channel_users)
3233 SilcIDCacheList list;
3234 SilcIDCacheEntry id_cache;
3235 SilcChannelEntry channel;
3240 SILC_LOG_DEBUG(("Start"));
3242 /* Go through all channels in the list */
3243 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3244 SILC_ID_CHANNEL, &list)) {
3245 if (silc_idcache_list_first(list, &id_cache)) {
3247 channel = (SilcChannelEntry)id_cache->context;
3249 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3250 name_len = strlen(channel->channel_name);
3252 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3254 silc_buffer_realloc(*channels,
3255 (*channels ? (*channels)->truelen + len : len));
3256 silc_buffer_pull_tail(*channels,
3257 ((*channels)->end - (*channels)->data));
3258 silc_buffer_format(*channels,
3259 SILC_STR_UI_SHORT(name_len),
3260 SILC_STR_UI_XNSTRING(channel->channel_name,
3262 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3263 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3264 SILC_STR_UI_INT(channel->mode),
3266 silc_buffer_pull(*channels, len);
3268 silc_server_announce_get_channel_users(server, channel,
3273 if (!silc_idcache_list_next(list, &id_cache))
3278 silc_idcache_list_free(list);
3282 /* This function is used to announce our existing channels to our router
3283 when we've connected to it. This also announces the users on the
3284 channels to the router. */
3286 void silc_server_announce_channels(SilcServer server)
3288 SilcBuffer channels = NULL, channel_users = NULL;
3290 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3292 /* Get channels and channel users in local list */
3293 silc_server_announce_get_channels(server, server->local_list,
3294 &channels, &channel_users);
3296 /* Get channels and channel users in global list */
3297 silc_server_announce_get_channels(server, server->global_list,
3298 &channels, &channel_users);
3301 silc_buffer_push(channels, channels->data - channels->head);
3302 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3304 /* Send the packet */
3305 silc_server_packet_send(server, server->router->connection,
3306 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3307 channels->data, channels->len,
3310 silc_buffer_free(channels);
3313 if (channel_users) {
3314 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3315 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3316 channel_users->len);
3318 /* Send the packet */
3319 silc_server_packet_send(server, server->router->connection,
3320 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3321 channel_users->data, channel_users->len,
3324 silc_buffer_free(channel_users);
3328 /* Failure timeout callback. If this is called then we will immediately
3329 process the received failure. We always process the failure with timeout
3330 since we do not want to blindly trust to received failure packets.
3331 This won't be called (the timeout is cancelled) if the failure was
3332 bogus (it is bogus if remote does not close the connection after sending
3335 SILC_TASK_CALLBACK(silc_server_failure_callback)
3337 SilcServerFailureContext f = (SilcServerFailureContext)context;
3339 if (f->sock->protocol) {
3340 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3341 f->sock->protocol->execute(f->server->timeout_queue, 0,
3342 f->sock->protocol, f->sock->sock, 0, 0);
3348 /* Assembles user list and users mode list from the `channel'. */
3350 void silc_server_get_users_on_channel(SilcServer server,
3351 SilcChannelEntry channel,
3352 SilcBuffer *user_list,
3353 SilcBuffer *mode_list,
3356 SilcChannelClientEntry chl;
3357 SilcBuffer client_id_list;
3358 SilcBuffer client_mode_list;
3360 uint32 list_count = 0;
3362 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3363 silc_list_count(channel->user_list));
3364 client_mode_list = silc_buffer_alloc(4 *
3365 silc_list_count(channel->user_list));
3366 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3367 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3368 silc_list_start(channel->user_list);
3369 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3371 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3372 silc_buffer_put(client_id_list, idp->data, idp->len);
3373 silc_buffer_pull(client_id_list, idp->len);
3374 silc_buffer_free(idp);
3376 /* Client's mode on channel */
3377 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3378 silc_buffer_pull(client_mode_list, 4);
3382 silc_buffer_push(client_id_list,
3383 client_id_list->data - client_id_list->head);
3384 silc_buffer_push(client_mode_list,
3385 client_mode_list->data - client_mode_list->head);
3387 *user_list = client_id_list;
3388 *mode_list = client_mode_list;
3389 *user_count = list_count;
3392 /* Saves users and their modes to the `channel'. */
3394 void silc_server_save_users_on_channel(SilcServer server,
3395 SilcSocketConnection sock,
3396 SilcChannelEntry channel,
3397 SilcClientID *noadd,
3398 SilcBuffer user_list,
3399 SilcBuffer mode_list,
3404 /* Cache the received Client ID's and modes. This cache expires
3405 whenever server sends notify message to channel. It means two things;
3406 some user has joined or leaved the channel. XXX TODO! */
3407 for (i = 0; i < user_count; i++) {
3410 SilcClientID *client_id;
3411 SilcClientEntry client;
3414 SILC_GET16_MSB(idp_len, user_list->data + 2);
3416 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3417 silc_buffer_pull(user_list, idp_len);
3422 SILC_GET32_MSB(mode, mode_list->data);
3423 silc_buffer_pull(mode_list, 4);
3425 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3426 silc_free(client_id);
3430 /* Check if we have this client cached already. */
3431 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3434 client = silc_idlist_find_client_by_id(server->global_list,
3437 /* If router did not find such Client ID in its lists then this must
3438 be bogus client or some router in the net is buggy. */
3439 if (server->server_type == SILC_ROUTER) {
3440 silc_free(client_id);
3444 /* We don't have that client anywhere, add it. The client is added
3445 to global list since server didn't have it in the lists so it must be
3447 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3449 silc_id_dup(client_id, SILC_ID_CLIENT),
3450 sock->user_data, NULL);
3452 silc_free(client_id);
3456 client->data.registered = TRUE;
3459 silc_free(client_id);
3461 if (!silc_server_client_on_channel(client, channel)) {
3462 /* Client was not on the channel, add it. */
3463 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3464 chl->client = client;
3466 chl->channel = channel;
3467 silc_list_add(channel->user_list, chl);
3468 silc_list_add(client->channels, chl);
3473 /* Lookups route to the client indicated by `id' client ID. The connection
3474 object and internal data object is returned. Returns NULL if route
3475 could not be found to the client. If the `client_id' is specified then
3476 it is used and the `id_data' is ignored. */
3478 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3479 unsigned char *id_data,
3481 SilcClientID *client_id,
3482 SilcIDListData *idata)
3485 SilcClientEntry client;
3487 SILC_LOG_DEBUG(("Start"));
3489 /* Decode destination Client ID */
3491 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3493 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3497 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3500 /* If the destination belongs to our server we don't have to route
3501 the packet anywhere but to send it to the local destination. */
3502 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3506 if (client && client->data.registered == FALSE)
3509 /* If we are router and the client has router then the client is in
3510 our cell but not directly connected to us. */
3511 if (server->server_type == SILC_ROUTER && client->router) {
3512 /* We are of course in this case the client's router thus the real
3513 "router" of the client is the server who owns the client. Thus
3514 we will send the packet to that server. */
3515 *idata = (SilcIDListData)client->router;
3516 return client->router->connection;
3519 /* Seems that client really is directly connected to us */
3520 *idata = (SilcIDListData)client;
3521 return client->connection;
3524 /* Destination belongs to someone not in this server. If we are normal
3525 server our action is to send the packet to our router. */
3526 if (server->server_type == SILC_SERVER && !server->standalone) {
3528 *idata = (SilcIDListData)server->router;
3529 return server->router->connection;
3532 /* We are router and we will perform route lookup for the destination
3533 and send the packet to fastest route. */
3534 if (server->server_type == SILC_ROUTER && !server->standalone) {
3535 /* Check first that the ID is valid */
3536 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3538 SilcSocketConnection dst_sock;
3540 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3543 *idata = (SilcIDListData)dst_sock->user_data;
3552 /* Encodes and returns channel list of channels the `client' has joined.
3553 Secret channels are not put to the list. */
3555 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3556 SilcClientEntry client)
3558 SilcBuffer buffer = NULL;
3559 SilcChannelEntry channel;
3560 SilcChannelClientEntry chl;
3565 silc_list_start(client->channels);
3566 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3567 channel = chl->channel;
3569 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3572 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3573 name_len = strlen(channel->channel_name);
3575 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3576 buffer = silc_buffer_realloc(buffer,
3577 (buffer ? (buffer)->truelen + len : len));
3578 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3579 silc_buffer_format(buffer,
3580 SILC_STR_UI_SHORT(name_len),
3581 SILC_STR_UI_XNSTRING(channel->channel_name,
3583 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3584 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3585 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3587 silc_buffer_pull(buffer, len);
3592 silc_buffer_push(buffer, buffer->data - buffer->head);
3597 /* Finds client entry by Client ID and if it is not found then resolves
3598 it using WHOIS command. */
3600 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3601 SilcClientID *client_id)
3603 SilcClientEntry client;
3605 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3607 client = silc_idlist_find_client_by_id(server->global_list,
3609 if (!client && server->server_type == SILC_ROUTER)
3613 if (!client && server->standalone)
3616 if (!client || !client->nickname || !client->username) {
3617 SilcBuffer buffer, idp;
3619 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3620 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3621 ++server->cmd_ident, 1,
3622 3, idp->data, idp->len);
3623 silc_server_packet_send(server, client ? client->router->connection :
3624 server->router->connection,
3625 SILC_PACKET_COMMAND, 0,
3626 buffer->data, buffer->len, FALSE);
3627 silc_buffer_free(idp);
3628 silc_buffer_free(buffer);
3634 /* A timeout callback for the re-key. We will be the initiator of the
3637 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3639 SilcSocketConnection sock = (SilcSocketConnection)context;
3640 SilcIDListData idata = (SilcIDListData)sock->user_data;
3641 SilcServer server = (SilcServer)idata->rekey->context;
3642 SilcProtocol protocol;
3643 SilcServerRekeyInternalContext *proto_ctx;
3645 SILC_LOG_DEBUG(("Start"));
3647 /* Allocate internal protocol context. This is sent as context
3649 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3650 proto_ctx->server = (void *)server;
3651 proto_ctx->sock = sock;
3652 proto_ctx->responder = FALSE;
3653 proto_ctx->pfs = idata->rekey->pfs;
3655 /* Perform rekey protocol. Will call the final callback after the
3656 protocol is over. */
3657 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3658 &protocol, proto_ctx, silc_server_rekey_final);
3659 sock->protocol = protocol;
3661 /* Run the protocol */
3662 protocol->execute(server->timeout_queue, 0, protocol,
3665 /* Re-register re-key timeout */
3666 silc_task_register(server->timeout_queue, sock->sock,
3667 silc_server_rekey_callback,
3668 context, idata->rekey->timeout, 0,
3669 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3672 /* The final callback for the REKEY protocol. This will actually take the
3673 new key material into use. */
3675 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3677 SilcProtocol protocol = (SilcProtocol)context;
3678 SilcServerRekeyInternalContext *ctx =
3679 (SilcServerRekeyInternalContext *)protocol->context;
3680 SilcServer server = (SilcServer)ctx->server;
3681 SilcSocketConnection sock = ctx->sock;
3683 SILC_LOG_DEBUG(("Start"));
3685 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3686 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3687 /* Error occured during protocol */
3688 silc_protocol_cancel(server->timeout_queue, protocol);
3689 silc_protocol_free(protocol);
3690 sock->protocol = NULL;
3692 silc_packet_context_free(ctx->packet);
3694 silc_ske_free(ctx->ske);
3699 /* Take the keys into use */
3700 if (ctx->pfs == TRUE)
3701 silc_server_protocol_rekey_generate_pfs(server, ctx);
3703 silc_server_protocol_rekey_generate(server, ctx);
3706 silc_protocol_free(protocol);
3707 sock->protocol = NULL;
3709 silc_packet_context_free(ctx->packet);
3711 silc_ske_free(ctx->ske);