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);
42 /* Allocates a new SILC server object. This has to be done before the server
43 can be used. After allocation one must call silc_server_init to initialize
44 the server. The new allocated server object is returned to the new_server
47 int silc_server_alloc(SilcServer *new_server)
51 SILC_LOG_DEBUG(("Allocating new server object"));
53 server = silc_calloc(1, sizeof(*server));
54 server->server_type = SILC_SERVER;
55 server->standalone = TRUE;
56 server->local_list = silc_calloc(1, sizeof(*server->local_list));
57 server->global_list = silc_calloc(1, sizeof(*server->global_list));
58 server->pending_commands = silc_dlist_init();
60 server->sim = silc_dlist_init();
68 /* Free's the SILC server object. This is called at the very end before
71 void silc_server_free(SilcServer server)
78 if (server->local_list)
79 silc_free(server->local_list);
80 if (server->global_list)
81 silc_free(server->global_list);
83 silc_rng_free(server->rng);
86 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
87 silc_dlist_del(server->sim, sim);
90 silc_dlist_uninit(server->sim);
94 silc_free(server->params);
96 if (server->pending_commands)
97 silc_dlist_uninit(server->pending_commands);
99 silc_math_primegen_uninit(); /* XXX */
104 /* Initializes the entire SILC server. This is called always before running
105 the server. This is called only once at the initialization of the program.
106 This binds the server to its listenning port. After this function returns
107 one should call silc_server_run to start the server. This returns TRUE
108 when everything is ok to run the server. Configuration file must be
109 read and parsed before calling this. */
111 int silc_server_init(SilcServer server)
113 int *sock = NULL, sock_count = 0, i;
115 SilcServerEntry id_entry;
117 SILC_LOG_DEBUG(("Initializing server"));
119 assert(server->config);
121 /* XXX After server is made as Silc Server Library this can be given
122 as argument, for now this is hard coded */
123 server->params = silc_calloc(1, sizeof(*server->params));
124 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
125 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
126 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
127 server->params->retry_keep_trying = FALSE;
128 server->params->protocol_timeout = 60;
129 server->params->require_reverse_mapping = FALSE;
131 /* Set log files where log message should be saved. */
132 server->config->server = server;
133 silc_config_server_setlogfiles(server->config);
135 /* Register all configured ciphers, PKCS and hash functions. */
136 silc_config_server_register_ciphers(server->config);
137 silc_config_server_register_pkcs(server->config);
138 silc_config_server_register_hashfuncs(server->config);
140 /* Initialize random number generator for the server. */
141 server->rng = silc_rng_alloc();
142 silc_rng_init(server->rng);
143 silc_math_primegen_init(); /* XXX */
145 /* Initialize hash functions for server to use */
146 silc_hash_alloc("md5", &server->md5hash);
147 silc_hash_alloc("sha1", &server->sha1hash);
149 /* Initialize none cipher */
150 silc_cipher_alloc("none", &server->none_cipher);
152 /* XXXXX Generate RSA key pair */
154 unsigned char *public_key;
155 unsigned char *private_key;
156 unsigned int pk_len, prv_len;
159 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
161 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
162 SILC_LOG_ERROR(("Could not create RSA key pair"));
166 if (server->pkcs->pkcs->init(server->pkcs->context,
167 1024, server->rng) == FALSE) {
168 SILC_LOG_ERROR(("Could not generate RSA key pair"));
172 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
174 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
177 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
178 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
181 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
183 server->private_key =
184 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
187 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
189 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
192 memset(public_key, 0, pk_len);
193 memset(private_key, 0, prv_len);
194 silc_free(public_key);
195 silc_free(private_key);
197 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
199 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
204 /* Create a listening server. Note that our server can listen on
205 multiple ports. All listeners are created here and now. */
206 /* XXX Still check this whether to use server_info or listen_port. */
208 while(server->config->listen_port) {
211 tmp = silc_net_create_server(server->config->listen_port->port,
212 server->config->listen_port->host);
216 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
217 sock[sock_count] = tmp;
218 server->config->listen_port = server->config->listen_port->next;
222 /* Initialize ID caches */
223 server->local_list->clients = silc_idcache_alloc(0);
224 server->local_list->servers = silc_idcache_alloc(0);
225 server->local_list->channels = silc_idcache_alloc(0);
227 /* These are allocated for normal server as well as these hold some
228 global information that the server has fetched from its router. For
229 router these are used as they are supposed to be used on router. */
230 server->global_list->clients = silc_idcache_alloc(0);
231 server->global_list->servers = silc_idcache_alloc(0);
232 server->global_list->channels = silc_idcache_alloc(0);
234 /* Allocate the entire socket list that is used in server. Eventually
235 all connections will have entry in this table (it is a table of
236 pointers to the actual object that is allocated individually
238 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
239 sizeof(*server->sockets));
241 for (i = 0; i < sock_count; i++) {
242 SilcSocketConnection newsocket = NULL;
244 /* Set socket to non-blocking mode */
245 silc_net_set_socket_nonblock(sock[i]);
246 server->sock = sock[i];
248 /* Create a Server ID for the server. */
249 silc_id_create_server_id(sock[i], server->rng, &id);
255 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
256 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
257 server->id_type = SILC_ID_SERVER;
258 server->server_name = server->config->server_info->server_name;
260 /* Add ourselves to the server list. We don't have a router yet
261 beacuse we haven't established a route yet. It will be done later.
262 For now, NULL is sent as router. This allocates new entry to
265 silc_idlist_add_server(server->local_list,
266 server->config->server_info->server_name,
267 server->server_type, server->id, NULL, NULL);
269 SILC_LOG_ERROR(("Could not add ourselves to cache"));
273 /* Add ourselves also to the socket table. The entry allocated above
274 is sent as argument for fast referencing in the future. */
275 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
280 server->sockets[sock[i]] = newsocket;
282 /* Put the allocated socket pointer also to the entry allocated above
283 for fast back-referencing to the socket list. */
284 id_entry->connection = (void *)server->sockets[sock[i]];
285 server->id_entry = id_entry;
288 /* Register the task queues. In SILC we have by default three task queues.
289 One task queue for non-timeout tasks which perform different kind of
290 I/O on file descriptors, timeout task queue for timeout tasks, and,
291 generic non-timeout task queue whose tasks apply to all connections. */
292 silc_task_queue_alloc(&server->io_queue, TRUE);
293 if (!server->io_queue) {
296 silc_task_queue_alloc(&server->timeout_queue, TRUE);
297 if (!server->timeout_queue) {
300 silc_task_queue_alloc(&server->generic_queue, TRUE);
301 if (!server->generic_queue) {
305 /* Register protocols */
306 silc_server_protocols_register();
308 /* Initialize the scheduler */
309 silc_schedule_init(&server->io_queue, &server->timeout_queue,
310 &server->generic_queue,
311 SILC_SERVER_MAX_CONNECTIONS);
313 /* Add the first task to the queue. This is task that is executed by
314 timeout. It expires as soon as the caller calls silc_server_run. This
315 task performs authentication protocol and key exchange with our
317 silc_task_register(server->timeout_queue, sock[0],
318 silc_server_connect_to_router,
319 (void *)server, 0, 1,
321 SILC_TASK_PRI_NORMAL);
323 /* Add listener task to the queue. This task receives new connections to the
324 server. This task remains on the queue until the end of the program. */
325 silc_task_register(server->io_queue, sock[0],
326 silc_server_accept_new_connection,
327 (void *)server, 0, 0,
329 SILC_TASK_PRI_NORMAL);
330 server->listenning = TRUE;
332 /* If server connections has been configured then we must be router as
333 normal server cannot have server connections, only router connections. */
334 if (server->config->servers)
335 server->server_type = SILC_ROUTER;
337 SILC_LOG_DEBUG(("Server initialized"));
339 /* We are done here, return succesfully */
342 silc_task_queue_free(server->timeout_queue);
344 silc_task_queue_free(server->io_queue);
346 for (i = 0; i < sock_count; i++)
347 silc_net_close_server(sock[i]);
352 /* Fork server to background and set gid+uid to non-root.
353 Silcd will not run as root, so trying to set either user or group to
354 root will cause silcd to exit. */
356 void silc_server_daemonise(SilcServer server)
358 /* Are we executing silcd as root or a regular user? */
365 if (!server->config->identity || !server->config->identity->user ||
366 !server->config->identity->group) {
367 fprintf(stderr, "Error:"
368 "\tSILC server must not be run as root. For the security of your\n"
369 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
370 "\tuser account. Modify the [Identity] configuration section to run\n"
371 "\tthe server as non-root user.\n");
375 /* Get the values given for user and group in configuration file */
376 user=server->config->identity->user;
377 group=server->config->identity->group;
379 /* Check whether the user/group information is text */
380 if (atoi(user)!=0 || atoi(group)!=0) {
381 SILC_LOG_DEBUG(("Invalid user and/or group information"));
382 SILC_LOG_DEBUG(("User and/or group given as number"));
383 fprintf(stderr, "Invalid user and/or group information\n");
384 fprintf(stderr, "Please assign them as names, not numbers\n");
388 /* Catch the nasty incident of string "0" returning 0 from atoi */
389 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
390 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
391 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
399 fprintf(stderr, "No such user %s found\n", user);
404 fprintf(stderr, "No such group %s found\n", group);
408 /* Check whether user and/or group is set to root. If yes, exit
409 immediately. Otherwise, setgid and setuid server to user.group */
410 if (gr->gr_gid==0 || pw->pw_uid==0) {
411 fprintf(stderr, "Error:"
412 "\tSILC server must not be run as root. For the security of your\n"
413 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
414 "\tuser account. Modify the [Identity] configuration section to run\n"
415 "\tthe server as non-root user.\n");
418 /* Fork server to background, making it a daemon */
420 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
421 SILC_LOG_DEBUG(("Forking SILC server to background"));
426 SILC_LOG_DEBUG(("Changing to group %s", group));
427 if(setgid(gr->gr_gid)==0) {
428 SILC_LOG_DEBUG(("Setgid to %s", group));
430 SILC_LOG_DEBUG(("Setgid to %s failed", group));
431 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
435 SILC_LOG_DEBUG(("Changing to user nobody"));
436 if(setuid(pw->pw_uid)==0) {
437 SILC_LOG_DEBUG(("Setuid to %s", user));
439 SILC_LOG_DEBUG(("Setuid to %s failed", user));
440 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
446 /* Fork server to background, making it a daemon */
448 SILC_LOG_DEBUG(("Server started as user"));
449 SILC_LOG_DEBUG(("Forking SILC server to background"));
456 /* Stops the SILC server. This function is used to shutdown the server.
457 This is usually called after the scheduler has returned. After stopping
458 the server one should call silc_server_free. */
460 void silc_server_stop(SilcServer server)
462 SILC_LOG_DEBUG(("Stopping server"));
464 /* Stop the scheduler, although it might be already stopped. This
465 doesn't hurt anyone. This removes all the tasks and task queues,
467 silc_schedule_stop();
468 silc_schedule_uninit();
470 silc_server_protocols_unregister();
472 SILC_LOG_DEBUG(("Server stopped"));
475 /* The heart of the server. This runs the scheduler thus runs the server.
476 When this returns the server has been stopped and the program will
479 void silc_server_run(SilcServer server)
481 SILC_LOG_DEBUG(("Running server"));
483 /* Start the scheduler, the heart of the SILC server. When this returns
484 the program will be terminated. */
488 /* Timeout callback that will be called to retry connecting to remote
489 router. This is used by both normal and router server. This will wait
490 before retrying the connecting. The timeout is generated by exponential
491 backoff algorithm. */
493 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
495 SilcServerConnection sconn = (SilcServerConnection)context;
496 SilcServer server = sconn->server;
498 SILC_LOG_INFO(("Retrying connecting to a router"));
500 /* Calculate next timeout */
501 if (sconn->retry_count >= 1) {
502 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
503 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
504 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
506 sconn->retry_timeout = server->params->retry_interval_min;
508 sconn->retry_count++;
509 sconn->retry_timeout = sconn->retry_timeout +
510 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
512 /* If we've reached max retry count, give up. */
513 if (sconn->retry_count > server->params->retry_count &&
514 server->params->retry_keep_trying == FALSE) {
515 SILC_LOG_ERROR(("Could not connect to router, giving up"));
519 /* Wait one before retrying */
520 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
521 context, sconn->retry_timeout,
522 server->params->retry_interval_min_usec,
523 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
526 /* Generic routine to use connect to a router. */
528 SILC_TASK_CALLBACK(silc_server_connect_router)
530 SilcServerConnection sconn = (SilcServerConnection)context;
531 SilcServer server = sconn->server;
532 SilcSocketConnection newsocket;
533 SilcProtocol protocol;
534 SilcServerKEInternalContext *proto_ctx;
537 /* Connect to remote host */
538 sock = silc_net_create_connection(sconn->remote_port,
541 SILC_LOG_ERROR(("Could not connect to router"));
542 silc_task_register(server->timeout_queue, fd,
543 silc_server_connect_to_router_retry,
544 context, 0, 1, SILC_TASK_TIMEOUT,
545 SILC_TASK_PRI_NORMAL);
549 /* Set socket options */
550 silc_net_set_socket_nonblock(sock);
551 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
553 /* Create socket connection for the connection. Even though we
554 know that we are connecting to a router we will mark the socket
555 to be unknown connection until we have executed authentication
557 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
558 server->sockets[sock] = newsocket;
559 newsocket->hostname = strdup(sconn->remote_host);
560 newsocket->ip = strdup(sconn->remote_host);
561 newsocket->port = sconn->remote_port;
562 sconn->sock = newsocket;
564 /* Allocate internal protocol context. This is sent as context
566 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
567 proto_ctx->server = (void *)server;
568 proto_ctx->context = (void *)sconn;
569 proto_ctx->sock = newsocket;
570 proto_ctx->rng = server->rng;
571 proto_ctx->responder = FALSE;
573 /* Perform key exchange protocol. silc_server_connect_to_router_second
574 will be called after the protocol is finished. */
575 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
576 &protocol, proto_ctx,
577 silc_server_connect_to_router_second);
578 newsocket->protocol = protocol;
580 /* Register a timeout task that will be executed if the protocol
581 is not executed within set limit. */
582 proto_ctx->timeout_task =
583 silc_task_register(server->timeout_queue, sock,
584 silc_server_timeout_remote,
585 server, server->params->protocol_timeout,
586 server->params->protocol_timeout_usec,
590 /* Register the connection for network input and output. This sets
591 that scheduler will listen for incoming packets for this connection
592 and sets that outgoing packets may be sent to this connection as
593 well. However, this doesn't set the scheduler for outgoing traffic,
594 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
595 later when outgoing data is available. */
596 context = (void *)server;
597 SILC_REGISTER_CONNECTION_FOR_IO(sock);
599 /* Run the protocol */
600 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
603 /* This function connects to our primary router or if we are a router this
604 establishes all our primary routes. This is called at the start of the
605 server to do authentication and key exchange with our router - called
608 SILC_TASK_CALLBACK(silc_server_connect_to_router)
610 SilcServer server = (SilcServer)context;
611 SilcServerConnection sconn;
613 SILC_LOG_DEBUG(("Connecting to router(s)"));
615 /* If we are normal SILC server we need to connect to our cell's
617 if (server->server_type == SILC_SERVER) {
618 SILC_LOG_DEBUG(("We are normal server"));
620 /* Create connection to the router, if configured. */
621 if (server->config->routers) {
623 /* Allocate connection object for hold connection specific stuff. */
624 sconn = silc_calloc(1, sizeof(*sconn));
625 sconn->server = server;
626 sconn->remote_host = server->config->routers->host;
627 sconn->remote_port = server->config->routers->port;
629 silc_task_register(server->timeout_queue, fd,
630 silc_server_connect_router,
631 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
632 SILC_TASK_PRI_NORMAL);
637 /* If we are a SILC router we need to establish all of our primary
639 if (server->server_type == SILC_ROUTER) {
640 SilcConfigServerSectionServerConnection *ptr;
642 SILC_LOG_DEBUG(("We are router"));
644 /* Create the connections to all our routes */
645 ptr = server->config->routers;
648 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
649 ptr->initiator ? "Initiator" : "Responder",
650 ptr->host, ptr->port));
652 if (ptr->initiator) {
653 /* Allocate connection object for hold connection specific stuff. */
654 sconn = silc_calloc(1, sizeof(*sconn));
655 sconn->server = server;
656 sconn->remote_host = ptr->host;
657 sconn->remote_port = ptr->port;
659 silc_task_register(server->timeout_queue, fd,
660 silc_server_connect_router,
661 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
662 SILC_TASK_PRI_NORMAL);
672 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
674 /* There wasn't a configured router, we will continue but we don't
675 have a connection to outside world. We will be standalone server. */
676 server->standalone = TRUE;
679 /* Second part of connecting to router(s). Key exchange protocol has been
680 executed and now we will execute authentication protocol. */
682 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
684 SilcProtocol protocol = (SilcProtocol)context;
685 SilcServerKEInternalContext *ctx =
686 (SilcServerKEInternalContext *)protocol->context;
687 SilcServer server = (SilcServer)ctx->server;
688 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
689 SilcSocketConnection sock = NULL;
690 SilcServerConnAuthInternalContext *proto_ctx;
692 SILC_LOG_DEBUG(("Start"));
694 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
695 /* Error occured during protocol */
696 silc_protocol_free(protocol);
698 silc_packet_context_free(ctx->packet);
700 silc_ske_free(ctx->ske);
702 silc_free(ctx->dest_id);
704 sock->protocol = NULL;
705 silc_server_disconnect_remote(server, sock, "Server closed connection: "
706 "Key exchange failed");
710 /* Allocate internal context for the authentication protocol. This
711 is sent as context for the protocol. */
712 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
713 proto_ctx->server = (void *)server;
714 proto_ctx->context = (void *)sconn;
715 proto_ctx->sock = sock = server->sockets[fd];
716 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
717 proto_ctx->dest_id_type = ctx->dest_id_type;
718 proto_ctx->dest_id = ctx->dest_id;
720 /* Resolve the authentication method used in this connection */
721 proto_ctx->auth_meth = SILC_PROTOCOL_CONN_AUTH_PASSWORD;
722 if (server->config->routers) {
723 SilcConfigServerSectionServerConnection *conn = NULL;
725 /* Check if we find a match from user configured connections */
726 conn = silc_config_server_find_router_conn(server->config,
730 /* Match found. Use the configured authentication method */
731 proto_ctx->auth_meth = conn->auth_meth;
732 if (conn->auth_data) {
733 proto_ctx->auth_data = strdup(conn->auth_data);
734 proto_ctx->auth_data_len = strlen(conn->auth_data);
737 /* No match found. */
744 /* Free old protocol as it is finished now */
745 silc_protocol_free(protocol);
747 silc_packet_context_free(ctx->packet);
749 sock->protocol = NULL;
751 /* Allocate the authentication protocol. This is allocated here
752 but we won't start it yet. We will be receiving party of this
753 protocol thus we will wait that connecting party will make
755 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
756 &sock->protocol, proto_ctx,
757 silc_server_connect_to_router_final);
759 /* Register timeout task. If the protocol is not executed inside
760 this timelimit the connection will be terminated. Currently
761 this is 15 seconds and is hard coded limit (XXX). */
762 proto_ctx->timeout_task =
763 silc_task_register(server->timeout_queue, sock->sock,
764 silc_server_timeout_remote,
765 (void *)server, 15, 0,
769 /* Run the protocol */
770 sock->protocol->execute(server->timeout_queue, 0,
771 sock->protocol, sock->sock, 0, 0);
774 /* Finalizes the connection to router. Registers a server task to the
775 queue so that we can accept new connections. */
777 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
779 SilcProtocol protocol = (SilcProtocol)context;
780 SilcServerConnAuthInternalContext *ctx =
781 (SilcServerConnAuthInternalContext *)protocol->context;
782 SilcServer server = (SilcServer)ctx->server;
783 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
784 SilcSocketConnection sock = ctx->sock;
785 SilcServerEntry id_entry;
787 SilcServerHBContext hb_context;
788 unsigned char *id_string;
790 SILC_LOG_DEBUG(("Start"));
792 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
793 /* Error occured during protocol */
795 silc_free(ctx->dest_id);
796 silc_server_disconnect_remote(server, sock, "Server closed connection: "
797 "Authentication failed");
801 /* Add a task to the queue. This task receives new connections to the
802 server. This task remains on the queue until the end of the program. */
803 if (!server->listenning) {
804 silc_task_register(server->io_queue, server->sock,
805 silc_server_accept_new_connection,
806 (void *)server, 0, 0,
808 SILC_TASK_PRI_NORMAL);
809 server->listenning = TRUE;
812 /* Send NEW_SERVER packet to the router. We will become registered
813 to the SILC network after sending this packet. */
814 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
815 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
816 strlen(server->server_name));
817 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
818 silc_buffer_format(packet,
819 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
820 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
821 SILC_STR_UI_SHORT(strlen(server->server_name)),
822 SILC_STR_UI_XNSTRING(server->server_name,
823 strlen(server->server_name)),
826 /* Send the packet */
827 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
828 packet->data, packet->len, TRUE);
829 silc_buffer_free(packet);
830 silc_free(id_string);
832 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
834 /* Add the connected router to local server list */
835 server->standalone = FALSE;
836 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
837 SILC_ROUTER, ctx->dest_id, NULL, sock);
840 silc_free(ctx->dest_id);
841 silc_server_disconnect_remote(server, sock, "Server closed connection: "
842 "Authentication failed");
846 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
847 silc_free(sock->user_data);
848 sock->user_data = (void *)id_entry;
849 sock->type = SILC_SOCKET_TYPE_ROUTER;
850 server->id_entry->router = id_entry;
851 server->router = id_entry;
852 server->router->data.registered = TRUE;
854 /* Perform keepalive. The `hb_context' will be freed automatically
855 when finally calling the silc_socket_free function. XXX hardcoded
857 hb_context = silc_calloc(1, sizeof(*hb_context));
858 hb_context->server = server;
859 silc_socket_set_heartbeat(sock, 600, hb_context,
860 silc_server_perform_heartbeat,
861 server->timeout_queue);
863 /* If we are router then announce our possible servers. */
864 if (server->server_type == SILC_ROUTER)
865 silc_server_announce_servers(server);
867 /* Announce our clients and channels to the router */
868 silc_server_announce_clients(server);
869 silc_server_announce_channels(server);
872 /* Free the temporary connection data context */
876 /* Free the protocol object */
877 silc_protocol_free(protocol);
879 silc_packet_context_free(ctx->packet);
881 silc_ske_free(ctx->ske);
883 sock->protocol = NULL;
886 /* Accepts new connections to the server. Accepting new connections are
887 done in three parts to make it async. */
889 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
891 SilcServer server = (SilcServer)context;
892 SilcSocketConnection newsocket;
893 SilcServerKEInternalContext *proto_ctx;
896 SILC_LOG_DEBUG(("Accepting new connection"));
898 server->stat.conn_attempts++;
900 sock = silc_net_accept_connection(server->sock);
902 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
903 server->stat.conn_failures++;
907 /* Check max connections */
908 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
909 if (server->config->redirect) {
910 /* XXX Redirecting connection to somewhere else now?? */
911 /*silc_server_send_notify("Server is full, trying to redirect..."); */
913 SILC_LOG_ERROR(("Refusing connection, server is full"));
914 server->stat.conn_failures++;
919 /* Set socket options */
920 silc_net_set_socket_nonblock(sock);
921 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
923 /* We don't create a ID yet, since we don't know what type of connection
924 this is yet. But, we do add the connection to the socket table. */
925 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
926 server->sockets[sock] = newsocket;
928 /* XXX This MUST be done async as this will block the entire server
929 process. Either we have to do our own resolver stuff or in the future
930 we can use threads. */
931 /* Perform name and address lookups for the remote host. */
932 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
933 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
935 SILC_LOG_ERROR(("IP/DNS lookup failed"));
936 server->stat.conn_failures++;
939 if (!newsocket->hostname)
940 newsocket->hostname = strdup(newsocket->ip);
942 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
945 /* Allocate internal context for key exchange protocol. This is
946 sent as context for the protocol. */
947 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
948 proto_ctx->server = context;
949 proto_ctx->sock = newsocket;
950 proto_ctx->rng = server->rng;
951 proto_ctx->responder = TRUE;
953 /* Prepare the connection for key exchange protocol. We allocate the
954 protocol but will not start it yet. The connector will be the
955 initiator of the protocol thus we will wait for initiation from
956 there before we start the protocol. */
957 server->stat.auth_attempts++;
958 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
959 &newsocket->protocol, proto_ctx,
960 silc_server_accept_new_connection_second);
962 /* Register a timeout task that will be executed if the connector
963 will not start the key exchange protocol within 60 seconds. For
964 now, this is a hard coded limit. After 60 secs the connection will
965 be closed if the key exchange protocol has not been started. */
966 proto_ctx->timeout_task =
967 silc_task_register(server->timeout_queue, newsocket->sock,
968 silc_server_timeout_remote,
973 /* Register the connection for network input and output. This sets
974 that scheduler will listen for incoming packets for this connection
975 and sets that outgoing packets may be sent to this connection as well.
976 However, this doesn't set the scheduler for outgoing traffic, it
977 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
978 later when outgoing data is available. */
979 SILC_REGISTER_CONNECTION_FOR_IO(sock);
982 /* Second part of accepting new connection. Key exchange protocol has been
983 performed and now it is time to do little connection authentication
984 protocol to figure out whether this connection is client or server
985 and whether it has right to access this server (especially server
986 connections needs to be authenticated). */
988 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
990 SilcProtocol protocol = (SilcProtocol)context;
991 SilcServerKEInternalContext *ctx =
992 (SilcServerKEInternalContext *)protocol->context;
993 SilcServer server = (SilcServer)ctx->server;
994 SilcSocketConnection sock = NULL;
995 SilcServerConnAuthInternalContext *proto_ctx;
997 SILC_LOG_DEBUG(("Start"));
999 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
1000 /* Error occured during protocol */
1001 silc_protocol_free(protocol);
1003 silc_packet_context_free(ctx->packet);
1005 silc_ske_free(ctx->ske);
1007 silc_free(ctx->dest_id);
1010 sock->protocol = NULL;
1011 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1012 "Key exchange failed");
1013 server->stat.auth_failures++;
1017 /* Allocate internal context for the authentication protocol. This
1018 is sent as context for the protocol. */
1019 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1020 proto_ctx->server = (void *)server;
1021 proto_ctx->sock = sock = server->sockets[fd];
1022 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1023 proto_ctx->responder = TRUE;
1024 proto_ctx->dest_id_type = ctx->dest_id_type;
1025 proto_ctx->dest_id = ctx->dest_id;
1027 /* Free old protocol as it is finished now */
1028 silc_protocol_free(protocol);
1030 silc_packet_context_free(ctx->packet);
1032 sock->protocol = NULL;
1034 /* Allocate the authentication protocol. This is allocated here
1035 but we won't start it yet. We will be receiving party of this
1036 protocol thus we will wait that connecting party will make
1037 their first move. */
1038 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1039 &sock->protocol, proto_ctx,
1040 silc_server_accept_new_connection_final);
1042 /* Register timeout task. If the protocol is not executed inside
1043 this timelimit the connection will be terminated. Currently
1044 this is 60 seconds and is hard coded limit (XXX). */
1045 proto_ctx->timeout_task =
1046 silc_task_register(server->timeout_queue, sock->sock,
1047 silc_server_timeout_remote,
1048 (void *)server, 60, 0,
1053 /* Final part of accepting new connection. The connection has now
1054 been authenticated and keys has been exchanged. We also know whether
1055 this is client or server connection. */
1057 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1059 SilcProtocol protocol = (SilcProtocol)context;
1060 SilcServerConnAuthInternalContext *ctx =
1061 (SilcServerConnAuthInternalContext *)protocol->context;
1062 SilcServer server = (SilcServer)ctx->server;
1063 SilcSocketConnection sock = ctx->sock;
1064 SilcServerHBContext hb_context;
1065 void *id_entry = NULL;
1067 SILC_LOG_DEBUG(("Start"));
1069 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
1070 /* Error occured during protocol */
1071 silc_protocol_free(protocol);
1073 silc_packet_context_free(ctx->packet);
1075 silc_ske_free(ctx->ske);
1077 silc_free(ctx->dest_id);
1080 sock->protocol = NULL;
1081 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1082 "Authentication failed");
1083 server->stat.auth_failures++;
1087 sock->type = ctx->conn_type;
1088 switch(sock->type) {
1089 case SILC_SOCKET_TYPE_CLIENT:
1091 SilcClientEntry client;
1093 SILC_LOG_DEBUG(("Remote host is client"));
1094 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1097 /* Add the client to the client ID cache. The nickname and Client ID
1098 and other information is created after we have received NEW_CLIENT
1099 packet from client. */
1100 client = silc_idlist_add_client(server->local_list,
1101 NULL, NULL, NULL, NULL, NULL, sock);
1103 SILC_LOG_ERROR(("Could not add new client to cache"));
1104 silc_free(sock->user_data);
1109 server->stat.my_clients++;
1110 server->stat.clients++;
1111 if (server->server_type == SILC_ROUTER)
1112 server->stat.cell_clients++;
1114 id_entry = (void *)client;
1117 case SILC_SOCKET_TYPE_SERVER:
1118 case SILC_SOCKET_TYPE_ROUTER:
1120 SilcServerEntry new_server;
1122 SILC_LOG_DEBUG(("Remote host is %s",
1123 sock->type == SILC_SOCKET_TYPE_SERVER ?
1124 "server" : "router"));
1125 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1126 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1127 "server" : "router"));
1129 /* Add the server into server cache. The server name and Server ID
1130 is updated after we have received NEW_SERVER packet from the
1131 server. We mark ourselves as router for this server if we really
1134 silc_idlist_add_server(server->local_list, NULL,
1135 sock->type == SILC_SOCKET_TYPE_SERVER ?
1136 SILC_SERVER : SILC_ROUTER, NULL,
1137 sock->type == SILC_SOCKET_TYPE_SERVER ?
1138 server->id_entry : NULL, sock);
1140 SILC_LOG_ERROR(("Could not add new server to cache"));
1141 silc_free(sock->user_data);
1146 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1147 server->stat.my_servers++;
1149 server->stat.my_routers++;
1150 server->stat.servers++;
1152 id_entry = (void *)new_server;
1154 /* There is connection to other server now, if it is router then
1155 we will have connection to outside world. If we are router but
1156 normal server connected to us then we will remain standalone,
1157 if we are standlone. */
1158 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1159 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1160 server->standalone = FALSE;
1161 if (!server->id_entry->router) {
1162 server->id_entry->router = id_entry;
1163 server->router = id_entry;
1172 /* Add the common data structure to the ID entry. */
1174 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1176 /* Add to sockets internal pointer for fast referencing */
1177 silc_free(sock->user_data);
1178 sock->user_data = id_entry;
1180 /* Connection has been fully established now. Everything is ok. */
1181 SILC_LOG_DEBUG(("New connection authenticated"));
1183 /* Perform keepalive. The `hb_context' will be freed automatically
1184 when finally calling the silc_socket_free function. XXX hardcoded
1186 hb_context = silc_calloc(1, sizeof(*hb_context));
1187 hb_context->server = server;
1188 silc_socket_set_heartbeat(sock, 600, hb_context,
1189 silc_server_perform_heartbeat,
1190 server->timeout_queue);
1192 silc_protocol_free(protocol);
1194 silc_packet_context_free(ctx->packet);
1196 silc_ske_free(ctx->ske);
1198 silc_free(ctx->dest_id);
1200 sock->protocol = NULL;
1203 /* This function is used to read packets from network and send packets to
1204 network. This is usually a generic task. */
1206 SILC_TASK_CALLBACK(silc_server_packet_process)
1208 SilcServer server = (SilcServer)context;
1209 SilcSocketConnection sock = server->sockets[fd];
1210 SilcIDListData idata;
1211 SilcCipher cipher = NULL;
1212 SilcHmac hmac = NULL;
1218 SILC_LOG_DEBUG(("Processing packet"));
1220 /* Packet sending */
1222 if (type == SILC_TASK_WRITE) {
1223 server->stat.packets_sent++;
1225 if (sock->outbuf->data - sock->outbuf->head)
1226 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1228 ret = silc_server_packet_send_real(server, sock, TRUE);
1230 /* If returned -2 could not write to connection now, will do
1238 /* The packet has been sent and now it is time to set the connection
1239 back to only for input. When there is again some outgoing data
1240 available for this connection it will be set for output as well.
1241 This call clears the output setting and sets it only for input. */
1242 SILC_SET_CONNECTION_FOR_INPUT(fd);
1243 SILC_UNSET_OUTBUF_PENDING(sock);
1245 silc_buffer_clear(sock->outbuf);
1249 /* Packet receiving */
1251 /* Read some data from connection */
1252 ret = silc_packet_receive(sock);
1258 SILC_LOG_DEBUG(("Read EOF"));
1260 /* If connection is disconnecting already we will finally
1261 close the connection */
1262 if (SILC_IS_DISCONNECTING(sock)) {
1263 if (sock->user_data)
1264 silc_server_free_sock_user_data(server, sock);
1265 silc_server_close_connection(server, sock);
1269 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1271 /* If the closed connection was our primary router connection the
1272 start re-connecting phase. */
1273 if (!server->standalone && server->server_type == SILC_SERVER &&
1274 sock == server->router->connection)
1275 silc_task_register(server->timeout_queue, 0,
1276 silc_server_connect_to_router,
1279 SILC_TASK_PRI_NORMAL);
1281 if (sock->user_data)
1282 silc_server_free_sock_user_data(server, sock);
1283 silc_server_close_connection(server, sock);
1287 /* If connection is disconnecting or disconnected we will ignore
1289 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1290 SILC_LOG_DEBUG(("Ignoring read data from invalid connection"));
1294 server->stat.packets_received++;
1296 /* Get keys and stuff from ID entry */
1297 idata = (SilcIDListData)sock->user_data;
1299 idata->last_receive = time(NULL);
1300 cipher = idata->receive_key;
1304 /* Process the packet. This will call the parser that will then
1305 decrypt and parse the packet. */
1306 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1310 /* Parses whole packet, received earlier. */
1312 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1314 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1315 SilcServer server = (SilcServer)parse_ctx->context;
1316 SilcSocketConnection sock = parse_ctx->sock;
1317 SilcPacketContext *packet = parse_ctx->packet;
1320 SILC_LOG_DEBUG(("Start"));
1322 /* Decrypt the received packet */
1323 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1324 packet->buffer, packet);
1329 /* Parse the packet. Packet type is returned. */
1330 ret = silc_packet_parse(packet);
1332 /* Parse the packet header in special way as this is "special"
1334 ret = silc_packet_parse_special(packet);
1337 if (ret == SILC_PACKET_NONE)
1340 if (server->server_type == SILC_ROUTER) {
1341 /* Route the packet if it is not destined to us. Other ID types but
1342 server are handled separately after processing them. */
1343 if (packet->dst_id_type == SILC_ID_SERVER &&
1344 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1345 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1347 /* Route the packet to fastest route for the destination ID */
1348 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1349 packet->dst_id_type);
1352 silc_server_packet_route(server,
1353 silc_server_route_get(server, id,
1354 packet->dst_id_type),
1360 /* Broadcast packet if it is marked as broadcast packet and it is
1361 originated from router and we are router. */
1362 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1363 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1364 silc_server_packet_broadcast(server, server->router->connection, packet);
1368 /* Parse the incoming packet type */
1369 silc_server_packet_parse_type(server, sock, packet);
1372 silc_buffer_clear(sock->inbuf);
1373 silc_packet_context_free(packet);
1374 silc_free(parse_ctx);
1377 /* Parser callback called by silc_packet_receive_process. This merely
1378 registers timeout that will handle the actual parsing when appropriate. */
1380 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1382 SilcServer server = (SilcServer)parser_context->context;
1383 SilcSocketConnection sock = parser_context->sock;
1385 switch (sock->type) {
1386 case SILC_SOCKET_TYPE_CLIENT:
1387 case SILC_SOCKET_TYPE_UNKNOWN:
1388 /* Parse the packet with timeout */
1389 silc_task_register(server->timeout_queue, sock->sock,
1390 silc_server_packet_parse_real,
1391 (void *)parser_context, 0, 100000,
1393 SILC_TASK_PRI_NORMAL);
1395 case SILC_SOCKET_TYPE_SERVER:
1396 case SILC_SOCKET_TYPE_ROUTER:
1397 /* Packets from servers are parsed as soon as possible */
1398 silc_task_register(server->timeout_queue, sock->sock,
1399 silc_server_packet_parse_real,
1400 (void *)parser_context, 0, 1,
1402 SILC_TASK_PRI_NORMAL);
1409 /* Parses the packet type and calls what ever routines the packet type
1410 requires. This is done for all incoming packets. */
1412 void silc_server_packet_parse_type(SilcServer server,
1413 SilcSocketConnection sock,
1414 SilcPacketContext *packet)
1416 SilcPacketType type = packet->type;
1418 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1420 /* Parse the packet type */
1422 case SILC_PACKET_DISCONNECT:
1423 SILC_LOG_DEBUG(("Disconnect packet"));
1426 case SILC_PACKET_SUCCESS:
1428 * Success received for something. For now we can have only
1429 * one protocol for connection executing at once hence this
1430 * success message is for whatever protocol is executing currently.
1432 SILC_LOG_DEBUG(("Success packet"));
1433 if (sock->protocol) {
1434 sock->protocol->execute(server->timeout_queue, 0,
1435 sock->protocol, sock->sock, 0, 0);
1439 case SILC_PACKET_FAILURE:
1441 * Failure received for something. For now we can have only
1442 * one protocol for connection executing at once hence this
1443 * failure message is for whatever protocol is executing currently.
1445 SILC_LOG_DEBUG(("Failure packet"));
1446 if (sock->protocol) {
1447 /* XXX Audit the failure type */
1448 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1449 sock->protocol->execute(server->timeout_queue, 0,
1450 sock->protocol, sock->sock, 0, 0);
1454 case SILC_PACKET_REJECT:
1455 SILC_LOG_DEBUG(("Reject packet"));
1459 case SILC_PACKET_NOTIFY:
1461 * Received notify packet. Server can receive notify packets from
1462 * router. Server then relays the notify messages to clients if needed.
1464 SILC_LOG_DEBUG(("Notify packet"));
1465 silc_server_notify(server, sock, packet);
1471 case SILC_PACKET_CHANNEL_MESSAGE:
1473 * Received channel message. Channel messages are special packets
1474 * (although probably most common ones) thus they are handled
1477 SILC_LOG_DEBUG(("Channel Message packet"));
1478 silc_server_channel_message(server, sock, packet);
1481 case SILC_PACKET_CHANNEL_KEY:
1483 * Received key for channel. As channels are created by the router
1484 * the keys are as well. We will distribute the key to all of our
1485 * locally connected clients on the particular channel. Router
1486 * never receives this channel and thus is ignored.
1488 SILC_LOG_DEBUG(("Channel Key packet"));
1489 silc_server_channel_key(server, sock, packet);
1495 case SILC_PACKET_COMMAND:
1497 * Recived command. Processes the command request and allocates the
1498 * command context and calls the command.
1500 SILC_LOG_DEBUG(("Command packet"));
1501 silc_server_command_process(server, sock, packet);
1504 case SILC_PACKET_COMMAND_REPLY:
1506 * Received command reply packet. Received command reply to command. It
1507 * may be reply to command sent by us or reply to command sent by client
1508 * that we've routed further.
1510 SILC_LOG_DEBUG(("Command Reply packet"));
1511 silc_server_command_reply(server, sock, packet);
1515 * Private Message packets
1517 case SILC_PACKET_PRIVATE_MESSAGE:
1519 * Received private message packet. The packet is coming from either
1522 SILC_LOG_DEBUG(("Private Message packet"));
1523 silc_server_private_message(server, sock, packet);
1526 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1528 * Private message key packet.
1533 * Key Exchange protocol packets
1535 case SILC_PACKET_KEY_EXCHANGE:
1536 SILC_LOG_DEBUG(("KE packet"));
1537 if (sock->protocol && sock->protocol->protocol->type
1538 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1540 SilcServerKEInternalContext *proto_ctx =
1541 (SilcServerKEInternalContext *)sock->protocol->context;
1543 proto_ctx->packet = silc_packet_context_dup(packet);
1545 /* Let the protocol handle the packet */
1546 sock->protocol->execute(server->timeout_queue, 0,
1547 sock->protocol, sock->sock, 0, 100000);
1549 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1550 "protocol active, packet dropped."));
1552 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1556 case SILC_PACKET_KEY_EXCHANGE_1:
1557 SILC_LOG_DEBUG(("KE 1 packet"));
1558 if (sock->protocol && sock->protocol->protocol->type
1559 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1561 SilcServerKEInternalContext *proto_ctx =
1562 (SilcServerKEInternalContext *)sock->protocol->context;
1564 if (proto_ctx->packet)
1565 silc_packet_context_free(proto_ctx->packet);
1567 proto_ctx->packet = silc_packet_context_dup(packet);
1568 proto_ctx->dest_id_type = packet->src_id_type;
1569 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1570 packet->src_id_type);
1571 if (!proto_ctx->dest_id)
1574 /* Let the protocol handle the packet */
1575 sock->protocol->execute(server->timeout_queue, 0,
1576 sock->protocol, sock->sock,
1579 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1580 "protocol active, packet dropped."));
1584 case SILC_PACKET_KEY_EXCHANGE_2:
1585 SILC_LOG_DEBUG(("KE 2 packet"));
1586 if (sock->protocol && sock->protocol->protocol->type
1587 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1589 SilcServerKEInternalContext *proto_ctx =
1590 (SilcServerKEInternalContext *)sock->protocol->context;
1592 if (proto_ctx->packet)
1593 silc_packet_context_free(proto_ctx->packet);
1595 proto_ctx->packet = silc_packet_context_dup(packet);
1596 proto_ctx->dest_id_type = packet->src_id_type;
1597 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1598 packet->src_id_type);
1599 if (!proto_ctx->dest_id)
1602 /* Let the protocol handle the packet */
1603 sock->protocol->execute(server->timeout_queue, 0,
1604 sock->protocol, sock->sock,
1607 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1608 "protocol active, packet dropped."));
1612 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1614 * Connection authentication request packet. When we receive this packet
1615 * we will send to the other end information about our mandatory
1616 * authentication method for the connection. This packet maybe received
1619 SILC_LOG_DEBUG(("Connection authentication request packet"));
1623 * Connection Authentication protocol packets
1625 case SILC_PACKET_CONNECTION_AUTH:
1626 /* Start of the authentication protocol. We receive here the
1627 authentication data and will verify it. */
1628 SILC_LOG_DEBUG(("Connection auth packet"));
1629 if (sock->protocol && sock->protocol->protocol->type
1630 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1632 SilcServerConnAuthInternalContext *proto_ctx =
1633 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1635 proto_ctx->packet = silc_packet_context_dup(packet);
1637 /* Let the protocol handle the packet */
1638 sock->protocol->execute(server->timeout_queue, 0,
1639 sock->protocol, sock->sock, 0, 0);
1641 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1642 "protocol active, packet dropped."));
1646 case SILC_PACKET_NEW_ID:
1648 * Received New ID packet. This includes some new ID that has been
1649 * created. It may be for client, server or channel. This is the way
1650 * to distribute information about new registered entities in the
1653 SILC_LOG_DEBUG(("New ID packet"));
1654 silc_server_new_id(server, sock, packet);
1657 case SILC_PACKET_NEW_ID_LIST:
1659 * Received list of ID's. This packet is used by servers and routers
1660 * to notify their primary router about clients and servers they have.
1662 SILC_LOG_DEBUG(("New ID List packet"));
1663 silc_server_new_id_list(server, sock, packet);
1666 case SILC_PACKET_NEW_CLIENT:
1668 * Received new client packet. This includes client information that
1669 * we will use to create initial client ID. After creating new
1670 * ID we will send it to the client.
1672 SILC_LOG_DEBUG(("New Client packet"));
1673 silc_server_new_client(server, sock, packet);
1676 case SILC_PACKET_NEW_SERVER:
1678 * Received new server packet. This includes Server ID and some other
1679 * information that we may save. This is received after server has
1682 SILC_LOG_DEBUG(("New Server packet"));
1683 silc_server_new_server(server, sock, packet);
1686 case SILC_PACKET_NEW_CHANNEL:
1688 * Received new channel packet. Information about new channel in the
1689 * network are distributed using this packet.
1691 SILC_LOG_DEBUG(("New Channel packet"));
1692 silc_server_new_channel(server, sock, packet);
1695 case SILC_PACKET_NEW_CHANNEL_USER:
1697 * Received new channel user packet. Information about new users on a
1698 * channel are distributed between routers using this packet. The
1699 * router receiving this will redistribute it and also sent JOIN notify
1700 * to local clients on the same channel. Normal server sends JOIN notify
1701 * to its local clients on the channel.
1703 SILC_LOG_DEBUG(("New Channel User packet"));
1704 silc_server_new_channel_user(server, sock, packet);
1707 case SILC_PACKET_NEW_CHANNEL_LIST:
1709 * List of new channel packets received. This is usually received when
1710 * existing server or router connects to us and distributes information
1711 * of all channels it has.
1713 SILC_LOG_DEBUG(("New Channel List packet"));
1714 silc_server_new_channel_list(server, sock, packet);
1717 case SILC_PACKET_NEW_CHANNEL_USER_LIST:
1719 * List of new channel user packets received. This is usually received
1720 * when existing server or router connects to us and distributes
1721 * information of all channel users it has.
1723 SILC_LOG_DEBUG(("New Channel User List packet"));
1724 silc_server_new_channel_user_list(server, sock, packet);
1727 case SILC_PACKET_REPLACE_ID:
1729 * Received replace ID packet. This sends the old ID that is to be
1730 * replaced with the new one included into the packet. Client must not
1733 SILC_LOG_DEBUG(("Replace ID packet"));
1734 silc_server_replace_id(server, sock, packet);
1737 case SILC_PACKET_REMOVE_ID:
1739 * Received remove ID Packet.
1741 SILC_LOG_DEBUG(("Remove ID packet"));
1742 silc_server_remove_id(server, sock, packet);
1745 case SILC_PACKET_REMOVE_CHANNEL_USER:
1747 * Received packet to remove user from a channel. Routers notify other
1748 * routers about a user leaving a channel.
1750 SILC_LOG_DEBUG(("Remove Channel User packet"));
1751 silc_server_remove_channel_user(server, sock, packet);
1754 case SILC_PACKET_SET_MODE:
1756 * Received packet to set the mode of channel or client's channel mode.
1758 SILC_LOG_DEBUG(("Set Mode packet"));
1759 silc_server_set_mode(server, sock, packet);
1762 case SILC_PACKET_HEARTBEAT:
1764 * Received heartbeat.
1766 SILC_LOG_DEBUG(("Heartbeat packet"));
1770 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1776 /* Closes connection to socket connection */
1778 void silc_server_close_connection(SilcServer server,
1779 SilcSocketConnection sock)
1781 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1783 /* We won't listen for this connection anymore */
1784 silc_schedule_unset_listen_fd(sock->sock);
1786 /* Unregister all tasks */
1787 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1788 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1790 /* Close the actual connection */
1791 silc_net_close_connection(sock->sock);
1792 server->sockets[sock->sock] = NULL;
1793 silc_socket_free(sock);
1796 /* Sends disconnect message to remote connection and disconnects the
1799 void silc_server_disconnect_remote(SilcServer server,
1800 SilcSocketConnection sock,
1801 const char *fmt, ...)
1804 unsigned char buf[4096];
1809 memset(buf, 0, sizeof(buf));
1811 vsprintf(buf, fmt, ap);
1814 SILC_LOG_DEBUG(("Disconnecting remote host"));
1816 /* Notify remote end that the conversation is over. The notify message
1817 is tried to be sent immediately. */
1818 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1819 buf, strlen(buf), TRUE);
1821 /* Mark the connection to be disconnected */
1822 SILC_SET_DISCONNECTED(sock);
1823 silc_server_close_connection(server, sock);
1826 /* Free's user_data pointer from socket connection object. This also sends
1827 appropriate notify packets to the network to inform about leaving
1830 void silc_server_free_sock_user_data(SilcServer server,
1831 SilcSocketConnection sock)
1833 SILC_LOG_DEBUG(("Start"));
1835 switch(sock->type) {
1836 case SILC_SOCKET_TYPE_CLIENT:
1838 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
1840 /* Remove client from all channels */
1841 silc_server_remove_from_channels(server, sock, user_data);
1843 /* XXX must take some info to history before freeing */
1845 /* Send REMOVE_ID packet to routers. */
1846 if (!server->standalone && server->router)
1847 silc_server_send_remove_id(server, server->router->connection,
1848 server->server_type == SILC_SERVER ?
1849 FALSE : TRUE, user_data->id,
1850 SILC_ID_CLIENT_LEN, SILC_ID_CLIENT);
1852 /* Free the client entry and everything in it */
1853 silc_idlist_del_data(user_data);
1854 silc_idlist_del_client(server->local_list, user_data);
1855 server->stat.my_clients--;
1856 server->stat.clients--;
1857 if (server->server_type == SILC_ROUTER)
1858 server->stat.cell_clients--;
1861 case SILC_SOCKET_TYPE_SERVER:
1862 case SILC_SOCKET_TYPE_ROUTER:
1864 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
1866 /* Send REMOVE_ID packet to routers. */
1867 if (!server->standalone && server->router)
1868 silc_server_send_remove_id(server, server->router->connection,
1869 server->server_type == SILC_SERVER ?
1870 FALSE : TRUE, user_data->id,
1871 SILC_ID_CLIENT_LEN, SILC_ID_CLIENT);
1873 /* Then also free all client entries that this server owns as
1874 they will become invalid now as well. */
1875 silc_server_remove_clients_by_server(server, user_data);
1877 /* If this was our primary router connection then we're lost to
1878 the outside world. */
1879 if (server->server_type == SILC_SERVER && server->router == user_data) {
1880 server->id_entry->router = NULL;
1881 server->router = NULL;
1882 server->standalone = TRUE;
1885 /* Free the server entry */
1886 silc_idlist_del_data(user_data);
1887 silc_idlist_del_server(server->local_list, user_data);
1888 server->stat.my_servers--;
1889 server->stat.servers--;
1890 if (server->server_type == SILC_ROUTER)
1891 server->stat.cell_servers--;
1896 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
1898 silc_idlist_del_data(user_data);
1899 silc_free(user_data);
1904 sock->user_data = NULL;
1907 /* This function is used to remove all client entries by the server `entry'.
1908 This is called when the connection is lost to the server. In this case
1909 we must invalidate all the client entries owned by the server `entry'. */
1911 int silc_server_remove_clients_by_server(SilcServer server,
1912 SilcServerEntry entry)
1914 SilcIDCacheList list = NULL;
1915 SilcIDCacheEntry id_cache = NULL;
1916 SilcClientEntry client = NULL;
1918 if (silc_idcache_find_by_id(server->local_list->clients,
1919 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1921 if (silc_idcache_list_first(list, &id_cache)) {
1923 client = (SilcClientEntry)id_cache->context;
1925 if (client->router != entry) {
1926 if (!silc_idcache_list_next(list, &id_cache))
1932 /* Remove the client entry */
1933 silc_server_remove_from_channels(server, NULL, client);
1934 silc_idlist_del_client(server->local_list, client);
1936 if (!silc_idcache_list_next(list, &id_cache))
1940 silc_idcache_list_free(list);
1943 if (silc_idcache_find_by_id(server->global_list->clients,
1944 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1946 if (silc_idcache_list_first(list, &id_cache)) {
1948 client = (SilcClientEntry)id_cache->context;
1950 if (client->router != entry) {
1951 if (!silc_idcache_list_next(list, &id_cache))
1957 /* Remove the client entry */
1958 silc_server_remove_from_channels(server, NULL, client);
1959 silc_idlist_del_client(server->global_list, client);
1961 if (!silc_idcache_list_next(list, &id_cache))
1965 silc_idcache_list_free(list);
1971 /* Checks whether given channel has global users. If it does this returns
1972 TRUE and FALSE if there is only locally connected clients on the channel. */
1974 int silc_server_channel_has_global(SilcChannelEntry channel)
1976 SilcChannelClientEntry chl;
1978 silc_list_start(channel->user_list);
1979 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1980 if (chl->client->router)
1987 /* Checks whether given channel has locally connected users. If it does this
1988 returns TRUE and FALSE if there is not one locally connected client. */
1990 int silc_server_channel_has_local(SilcChannelEntry channel)
1992 SilcChannelClientEntry chl;
1994 silc_list_start(channel->user_list);
1995 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1996 if (!chl->client->router)
2003 /* Removes client from all channels it has joined. This is used when client
2004 connection is disconnected. If the client on a channel is last, the
2005 channel is removed as well. This sends the SIGNOFF notify types. */
2007 void silc_server_remove_from_channels(SilcServer server,
2008 SilcSocketConnection sock,
2009 SilcClientEntry client)
2011 SilcChannelEntry channel;
2012 SilcChannelClientEntry chl;
2015 SILC_LOG_DEBUG(("Start"));
2017 if (!client || !client->id)
2020 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2022 /* Remove the client from all channels. The client is removed from
2023 the channels' user list. */
2024 silc_list_start(client->channels);
2025 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2026 channel = chl->channel;
2028 /* Remove channel from client's channel list */
2029 silc_list_del(client->channels, chl);
2031 /* Remove channel if there is no users anymore */
2032 if (server->server_type == SILC_ROUTER &&
2033 silc_list_count(channel->user_list) < 2) {
2034 if (!silc_idlist_del_channel(server->local_list, channel))
2035 silc_idlist_del_channel(server->global_list, channel);
2036 server->stat.my_channels--;
2040 /* Remove client from channel's client list */
2041 silc_list_del(channel->user_list, chl);
2043 server->stat.my_chanclients--;
2045 /* If there is not at least one local user on the channel then we don't
2046 need the channel entry anymore, we can remove it safely. */
2047 if (server->server_type == SILC_SERVER &&
2048 !silc_server_channel_has_local(channel)) {
2049 /* Notify about leaving client if this channel has global users. */
2050 if (channel->global_users)
2051 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2052 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2053 clidp->data, clidp->len);
2055 if (!silc_idlist_del_channel(server->local_list, channel))
2056 silc_idlist_del_channel(server->global_list, channel);
2057 server->stat.my_channels--;
2061 /* Send notify to channel about client leaving SILC and thus
2062 the entire channel. */
2063 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2064 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2065 clidp->data, clidp->len);
2068 silc_buffer_free(clidp);
2071 /* Removes client from one channel. This is used for example when client
2072 calls LEAVE command to remove itself from the channel. Returns TRUE
2073 if channel still exists and FALSE if the channel is removed when
2074 last client leaves the channel. If `notify' is FALSE notify messages
2077 int silc_server_remove_from_one_channel(SilcServer server,
2078 SilcSocketConnection sock,
2079 SilcChannelEntry channel,
2080 SilcClientEntry client,
2083 SilcChannelEntry ch;
2084 SilcChannelClientEntry chl;
2087 SILC_LOG_DEBUG(("Start"));
2089 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2091 /* Remove the client from the channel. The client is removed from
2092 the channel's user list. */
2093 silc_list_start(client->channels);
2094 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2095 if (chl->channel != channel)
2100 /* Remove channel from client's channel list */
2101 silc_list_del(client->channels, chl);
2103 /* Remove channel if there is no users anymore */
2104 if (server->server_type == SILC_ROUTER &&
2105 silc_list_count(channel->user_list) < 2) {
2106 if (!silc_idlist_del_channel(server->local_list, channel))
2107 silc_idlist_del_channel(server->global_list, channel);
2108 silc_buffer_free(clidp);
2109 server->stat.my_channels--;
2113 /* Remove client from channel's client list */
2114 silc_list_del(channel->user_list, chl);
2116 server->stat.my_chanclients--;
2118 /* If there is no global users on the channel anymore mark the channel
2119 as local channel. */
2120 if (server->server_type == SILC_SERVER &&
2121 !silc_server_channel_has_global(channel))
2122 channel->global_users = FALSE;
2124 /* If there is not at least one local user on the channel then we don't
2125 need the channel entry anymore, we can remove it safely. */
2126 if (server->server_type == SILC_SERVER &&
2127 !silc_server_channel_has_local(channel)) {
2128 /* Notify about leaving client if this channel has global users. */
2129 if (notify && channel->global_users)
2130 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2131 SILC_NOTIFY_TYPE_LEAVE, 1,
2132 clidp->data, clidp->len);
2134 if (!silc_idlist_del_channel(server->local_list, channel))
2135 silc_idlist_del_channel(server->global_list, channel);
2136 silc_buffer_free(clidp);
2137 server->stat.my_channels--;
2141 /* Send notify to channel about client leaving the channel */
2143 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2144 SILC_NOTIFY_TYPE_LEAVE, 1,
2145 clidp->data, clidp->len);
2149 silc_buffer_free(clidp);
2153 /* Returns TRUE if the given client is on the channel. FALSE if not.
2154 This works because we assure that the user list on the channel is
2155 always in up to date thus we can only check the channel list from
2156 `client' which is faster than checking the user list from `channel'. */
2158 int silc_server_client_on_channel(SilcClientEntry client,
2159 SilcChannelEntry channel)
2161 SilcChannelClientEntry chl;
2163 if (!client || !channel)
2166 silc_list_start(client->channels);
2167 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2168 if (chl->channel == channel)
2174 /* Timeout callback. This is called if connection is idle or for some
2175 other reason is not responding within some period of time. This
2176 disconnects the remote end. */
2178 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2180 SilcServer server = (SilcServer)context;
2181 SilcSocketConnection sock = server->sockets[fd];
2186 if (sock->user_data)
2187 silc_server_free_sock_user_data(server, sock);
2189 silc_server_disconnect_remote(server, sock,
2190 "Server closed connection: "
2191 "Connection timeout");
2194 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2195 function may be used only by router. In real SILC network all channels
2196 are created by routers thus this function is never used by normal
2199 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2200 SilcServerID *router_id,
2204 SilcChannelID *channel_id;
2205 SilcChannelEntry entry;
2208 SILC_LOG_DEBUG(("Creating new channel"));
2213 /* Allocate cipher */
2214 silc_cipher_alloc(cipher, &key);
2216 channel_name = strdup(channel_name);
2218 /* Create the channel */
2219 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2220 entry = silc_idlist_add_channel(server->local_list, channel_name,
2221 SILC_CHANNEL_MODE_NONE, channel_id,
2224 silc_free(channel_name);
2228 /* Now create the actual key material */
2229 silc_server_create_channel_key(server, entry, 16);
2231 /* Notify other routers about the new channel. We send the packet
2232 to our primary route. */
2233 if (server->standalone == FALSE) {
2234 silc_server_send_new_channel(server, server->router->connection, TRUE,
2235 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2238 server->stat.my_channels++;
2243 /* Same as above but creates the channel with Channel ID `channel_id. */
2246 silc_server_create_new_channel_with_id(SilcServer server,
2249 SilcChannelID *channel_id)
2251 SilcChannelEntry entry;
2254 SILC_LOG_DEBUG(("Creating new channel"));
2259 /* Allocate cipher */
2260 silc_cipher_alloc(cipher, &key);
2262 channel_name = strdup(channel_name);
2264 /* Create the channel */
2265 entry = silc_idlist_add_channel(server->local_list, channel_name,
2266 SILC_CHANNEL_MODE_NONE, channel_id,
2269 silc_free(channel_name);
2273 /* Now create the actual key material */
2274 silc_server_create_channel_key(server, entry, 16);
2276 /* Notify other routers about the new channel. We send the packet
2277 to our primary route. */
2278 if (server->standalone == FALSE) {
2279 silc_server_send_new_channel(server, server->router->connection, TRUE,
2280 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2283 server->stat.my_channels++;
2288 /* Generates new channel key. This is used to create the initial channel key
2289 but also to re-generate new key for channel. If `key_len' is provided
2290 it is the bytes of the key length. */
2292 void silc_server_create_channel_key(SilcServer server,
2293 SilcChannelEntry channel,
2294 unsigned int key_len)
2297 unsigned char channel_key[32];
2300 if (!channel->channel_key)
2301 silc_cipher_alloc("twofish", &channel->channel_key);
2305 else if (channel->key_len)
2306 len = channel->key_len / 8;
2308 len = sizeof(channel_key);
2310 /* Create channel key */
2311 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2314 channel->channel_key->cipher->set_key(channel->channel_key->context,
2317 /* Remove old key if exists */
2319 memset(channel->key, 0, channel->key_len / 8);
2320 silc_free(channel->key);
2324 channel->key_len = len * 8;
2325 channel->key = silc_calloc(len, sizeof(*channel->key));
2326 memcpy(channel->key, channel_key, len);
2327 memset(channel_key, 0, sizeof(channel_key));
2330 /* Saves the channel key found in the encoded `key_payload' buffer. This
2331 function is used when we receive Channel Key Payload and also when we're
2332 processing JOIN command reply. Returns entry to the channel. */
2334 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2335 SilcBuffer key_payload,
2336 SilcChannelEntry channel)
2338 SilcChannelKeyPayload payload = NULL;
2339 SilcChannelID *id = NULL;
2341 unsigned int tmp_len;
2344 /* Decode channel key payload */
2345 payload = silc_channel_key_payload_parse(key_payload);
2347 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2352 /* Get the channel entry */
2355 /* Get channel ID */
2356 tmp = silc_channel_key_get_id(payload, &tmp_len);
2357 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2363 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2365 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2367 SILC_LOG_ERROR(("Received key for non-existent channel"));
2373 tmp = silc_channel_key_get_key(payload, &tmp_len);
2379 cipher = silc_channel_key_get_cipher(payload, NULL);;
2385 /* Remove old key if exists */
2387 memset(channel->key, 0, channel->key_len / 8);
2388 silc_free(channel->key);
2389 silc_cipher_free(channel->channel_key);
2392 /* Create new cipher */
2393 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2399 channel->key_len = tmp_len * 8;
2400 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2401 memcpy(channel->key, tmp, tmp_len);
2402 channel->channel_key->cipher->set_key(channel->channel_key->context,
2409 silc_channel_key_payload_free(payload);
2414 /* Heartbeat callback. This function is set as argument for the
2415 silc_socket_set_heartbeat function. The library will call this function
2416 at the set time interval. */
2418 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2421 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2423 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2426 /* Send the heartbeat */
2427 silc_server_send_heartbeat(hb->server, sock);
2430 /* Returns assembled of all servers in the given ID list. The packet's
2431 form is dictated by the New ID payload. */
2433 static void silc_server_announce_get_servers(SilcServer server,
2435 SilcBuffer *servers)
2437 SilcIDCacheList list;
2438 SilcIDCacheEntry id_cache;
2439 SilcServerEntry entry;
2442 /* Go through all clients in the list */
2443 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2444 SILC_ID_SERVER, &list)) {
2445 if (silc_idcache_list_first(list, &id_cache)) {
2447 entry = (SilcServerEntry)id_cache->context;
2449 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2451 *servers = silc_buffer_realloc(*servers,
2453 (*servers)->truelen + idp->len :
2455 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2456 silc_buffer_put(*servers, idp->data, idp->len);
2457 silc_buffer_pull(*servers, idp->len);
2458 silc_buffer_free(idp);
2460 if (!silc_idcache_list_next(list, &id_cache))
2465 silc_idcache_list_free(list);
2469 /* This function is used by router to announce existing servers to our
2470 primary router when we've connected to it. */
2472 void silc_server_announce_servers(SilcServer server)
2474 SilcBuffer servers = NULL;
2476 SILC_LOG_DEBUG(("Announcing servers"));
2478 /* Get servers in local list */
2479 silc_server_announce_get_servers(server, server->local_list, &servers);
2481 /* Get servers in global list */
2482 silc_server_announce_get_servers(server, server->global_list, &servers);
2485 silc_buffer_push(servers, servers->data - servers->head);
2486 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2488 /* Send the packet */
2489 silc_server_packet_send(server, server->router->connection,
2490 SILC_PACKET_NEW_ID_LIST, 0,
2491 servers->data, servers->len, TRUE);
2493 silc_buffer_free(servers);
2497 /* Returns assembled packet of all clients in the given ID list. The
2498 packet's form is dictated by the New ID Payload. */
2500 static void silc_server_announce_get_clients(SilcServer server,
2502 SilcBuffer *clients)
2504 SilcIDCacheList list;
2505 SilcIDCacheEntry id_cache;
2506 SilcClientEntry client;
2509 /* Go through all clients in the list */
2510 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2511 SILC_ID_CLIENT, &list)) {
2512 if (silc_idcache_list_first(list, &id_cache)) {
2514 client = (SilcClientEntry)id_cache->context;
2516 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2518 *clients = silc_buffer_realloc(*clients,
2520 (*clients)->truelen + idp->len :
2522 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2523 silc_buffer_put(*clients, idp->data, idp->len);
2524 silc_buffer_pull(*clients, idp->len);
2525 silc_buffer_free(idp);
2527 if (!silc_idcache_list_next(list, &id_cache))
2532 silc_idcache_list_free(list);
2536 /* This function is used to announce our existing clients to our router
2537 when we've connected to it. */
2539 void silc_server_announce_clients(SilcServer server)
2541 SilcBuffer clients = NULL;
2543 SILC_LOG_DEBUG(("Announcing clients"));
2545 /* Get clients in local list */
2546 silc_server_announce_get_clients(server, server->local_list,
2549 /* As router we announce our global list as well */
2550 if (server->server_type == SILC_ROUTER)
2551 silc_server_announce_get_clients(server, server->global_list,
2555 silc_buffer_push(clients, clients->data - clients->head);
2556 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2558 /* Send the packet */
2559 silc_server_packet_send(server, server->router->connection,
2560 SILC_PACKET_NEW_ID_LIST, 0,
2561 clients->data, clients->len, TRUE);
2563 silc_buffer_free(clients);
2567 /* Returns assembled packets for all channels and users on those channels
2568 from the given ID List. The packets are in the form dictated by the
2569 New Channel and New Channel User payloads. */
2571 static void silc_server_announce_get_channels(SilcServer server,
2573 SilcBuffer *channels,
2574 SilcBuffer *channel_users)
2576 SilcIDCacheList list;
2577 SilcIDCacheEntry id_cache;
2578 SilcChannelEntry channel;
2579 SilcChannelClientEntry chl;
2581 unsigned short name_len;
2584 /* Go through all channels in the list */
2585 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2586 SILC_ID_CHANNEL, &list)) {
2587 if (silc_idcache_list_first(list, &id_cache)) {
2589 channel = (SilcChannelEntry)id_cache->context;
2591 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2592 name_len = strlen(channel->channel_name);
2594 len = 4 + name_len + SILC_ID_CHANNEL_LEN;
2596 silc_buffer_realloc(*channels,
2597 (*channels ? (*channels)->truelen + len : len));
2598 silc_buffer_pull_tail(*channels,
2599 ((*channels)->end - (*channels)->data));
2600 silc_buffer_format(*channels,
2601 SILC_STR_UI_SHORT(name_len),
2602 SILC_STR_UI_XNSTRING(channel->channel_name,
2604 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2605 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2607 silc_buffer_pull(*channels, len);
2609 /* Now find all users on the channel */
2610 silc_list_start(channel->user_list);
2611 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2612 unsigned char *clid;
2614 clid = silc_id_id2str(chl->client->id, SILC_ID_CLIENT);
2616 len = 4 + SILC_ID_CHANNEL_LEN + SILC_ID_CLIENT_LEN;
2618 silc_buffer_realloc(*channel_users,
2620 (*channel_users)->truelen + len : len));
2621 silc_buffer_pull_tail(*channel_users,
2622 ((*channel_users)->end -
2623 (*channel_users)->data));
2624 silc_buffer_format(*channel_users,
2625 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2626 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2627 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
2628 SILC_STR_UI_XNSTRING(clid, SILC_ID_CLIENT_LEN),
2630 silc_buffer_pull(*channel_users, len);
2636 if (!silc_idcache_list_next(list, &id_cache))
2641 silc_idcache_list_free(list);
2645 /* This function is used to announce our existing channels to our router
2646 when we've connected to it. This also announces the users on the
2647 channels to the router. */
2649 void silc_server_announce_channels(SilcServer server)
2651 SilcBuffer channels = NULL, channel_users = NULL;
2653 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2655 /* Get channels and channel users in local list */
2656 silc_server_announce_get_channels(server, server->local_list,
2657 &channels, &channel_users);
2659 /* Get channels and channel users in global list */
2660 silc_server_announce_get_channels(server, server->global_list,
2661 &channels, &channel_users);
2664 silc_buffer_push(channels, channels->data - channels->head);
2665 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2667 /* Send the packet */
2668 silc_server_packet_send(server, server->router->connection,
2669 SILC_PACKET_NEW_CHANNEL_LIST, 0,
2670 channels->data, channels->len,
2673 silc_buffer_free(channels);
2676 if (channel_users) {
2677 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2678 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2679 channel_users->len);
2681 /* Send the packet */
2682 silc_server_packet_send(server, server->router->connection,
2683 SILC_PACKET_NEW_CHANNEL_USER_LIST, 0,
2684 channel_users->data, channel_users->len,
2687 silc_buffer_free(channel_users);