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);
941 newsocket->port = silc_net_get_remote_port(sock);
943 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
946 /* Allocate internal context for key exchange protocol. This is
947 sent as context for the protocol. */
948 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
949 proto_ctx->server = context;
950 proto_ctx->sock = newsocket;
951 proto_ctx->rng = server->rng;
952 proto_ctx->responder = TRUE;
954 /* Prepare the connection for key exchange protocol. We allocate the
955 protocol but will not start it yet. The connector will be the
956 initiator of the protocol thus we will wait for initiation from
957 there before we start the protocol. */
958 server->stat.auth_attempts++;
959 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
960 &newsocket->protocol, proto_ctx,
961 silc_server_accept_new_connection_second);
963 /* Register a timeout task that will be executed if the connector
964 will not start the key exchange protocol within 60 seconds. For
965 now, this is a hard coded limit. After 60 secs the connection will
966 be closed if the key exchange protocol has not been started. */
967 proto_ctx->timeout_task =
968 silc_task_register(server->timeout_queue, newsocket->sock,
969 silc_server_timeout_remote,
974 /* Register the connection for network input and output. This sets
975 that scheduler will listen for incoming packets for this connection
976 and sets that outgoing packets may be sent to this connection as well.
977 However, this doesn't set the scheduler for outgoing traffic, it
978 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
979 later when outgoing data is available. */
980 SILC_REGISTER_CONNECTION_FOR_IO(sock);
983 /* Second part of accepting new connection. Key exchange protocol has been
984 performed and now it is time to do little connection authentication
985 protocol to figure out whether this connection is client or server
986 and whether it has right to access this server (especially server
987 connections needs to be authenticated). */
989 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
991 SilcProtocol protocol = (SilcProtocol)context;
992 SilcServerKEInternalContext *ctx =
993 (SilcServerKEInternalContext *)protocol->context;
994 SilcServer server = (SilcServer)ctx->server;
995 SilcSocketConnection sock = NULL;
996 SilcServerConnAuthInternalContext *proto_ctx;
998 SILC_LOG_DEBUG(("Start"));
1000 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
1001 /* Error occured during protocol */
1002 silc_protocol_free(protocol);
1004 silc_packet_context_free(ctx->packet);
1006 silc_ske_free(ctx->ske);
1008 silc_free(ctx->dest_id);
1011 sock->protocol = NULL;
1012 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1013 "Key exchange failed");
1014 server->stat.auth_failures++;
1018 /* Allocate internal context for the authentication protocol. This
1019 is sent as context for the protocol. */
1020 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1021 proto_ctx->server = (void *)server;
1022 proto_ctx->sock = sock = server->sockets[fd];
1023 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1024 proto_ctx->responder = TRUE;
1025 proto_ctx->dest_id_type = ctx->dest_id_type;
1026 proto_ctx->dest_id = ctx->dest_id;
1028 /* Free old protocol as it is finished now */
1029 silc_protocol_free(protocol);
1031 silc_packet_context_free(ctx->packet);
1033 sock->protocol = NULL;
1035 /* Allocate the authentication protocol. This is allocated here
1036 but we won't start it yet. We will be receiving party of this
1037 protocol thus we will wait that connecting party will make
1038 their first move. */
1039 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1040 &sock->protocol, proto_ctx,
1041 silc_server_accept_new_connection_final);
1043 /* Register timeout task. If the protocol is not executed inside
1044 this timelimit the connection will be terminated. Currently
1045 this is 60 seconds and is hard coded limit (XXX). */
1046 proto_ctx->timeout_task =
1047 silc_task_register(server->timeout_queue, sock->sock,
1048 silc_server_timeout_remote,
1049 (void *)server, 60, 0,
1054 /* Final part of accepting new connection. The connection has now
1055 been authenticated and keys has been exchanged. We also know whether
1056 this is client or server connection. */
1058 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1060 SilcProtocol protocol = (SilcProtocol)context;
1061 SilcServerConnAuthInternalContext *ctx =
1062 (SilcServerConnAuthInternalContext *)protocol->context;
1063 SilcServer server = (SilcServer)ctx->server;
1064 SilcSocketConnection sock = ctx->sock;
1065 SilcServerHBContext hb_context;
1066 void *id_entry = NULL;
1068 SILC_LOG_DEBUG(("Start"));
1070 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
1071 /* Error occured during protocol */
1072 silc_protocol_free(protocol);
1074 silc_packet_context_free(ctx->packet);
1076 silc_ske_free(ctx->ske);
1078 silc_free(ctx->dest_id);
1081 sock->protocol = NULL;
1082 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1083 "Authentication failed");
1084 server->stat.auth_failures++;
1088 sock->type = ctx->conn_type;
1089 switch(sock->type) {
1090 case SILC_SOCKET_TYPE_CLIENT:
1092 SilcClientEntry client;
1094 SILC_LOG_DEBUG(("Remote host is client"));
1095 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1098 /* Add the client to the client ID cache. The nickname and Client ID
1099 and other information is created after we have received NEW_CLIENT
1100 packet from client. */
1101 client = silc_idlist_add_client(server->local_list,
1102 NULL, NULL, NULL, NULL, NULL, sock);
1104 SILC_LOG_ERROR(("Could not add new client to cache"));
1105 silc_free(sock->user_data);
1110 server->stat.my_clients++;
1111 server->stat.clients++;
1112 if (server->server_type == SILC_ROUTER)
1113 server->stat.cell_clients++;
1115 id_entry = (void *)client;
1118 case SILC_SOCKET_TYPE_SERVER:
1119 case SILC_SOCKET_TYPE_ROUTER:
1121 SilcServerEntry new_server;
1123 SILC_LOG_DEBUG(("Remote host is %s",
1124 sock->type == SILC_SOCKET_TYPE_SERVER ?
1125 "server" : "router"));
1126 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1127 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1128 "server" : "router"));
1130 /* Add the server into server cache. The server name and Server ID
1131 is updated after we have received NEW_SERVER packet from the
1132 server. We mark ourselves as router for this server if we really
1135 silc_idlist_add_server(server->local_list, NULL,
1136 sock->type == SILC_SOCKET_TYPE_SERVER ?
1137 SILC_SERVER : SILC_ROUTER, NULL,
1138 sock->type == SILC_SOCKET_TYPE_SERVER ?
1139 server->id_entry : NULL, sock);
1141 SILC_LOG_ERROR(("Could not add new server to cache"));
1142 silc_free(sock->user_data);
1147 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1148 server->stat.my_servers++;
1150 server->stat.my_routers++;
1151 server->stat.servers++;
1153 id_entry = (void *)new_server;
1155 /* There is connection to other server now, if it is router then
1156 we will have connection to outside world. If we are router but
1157 normal server connected to us then we will remain standalone,
1158 if we are standlone. */
1159 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1160 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1161 server->standalone = FALSE;
1162 if (!server->id_entry->router) {
1163 server->id_entry->router = id_entry;
1164 server->router = id_entry;
1173 /* Add the common data structure to the ID entry. */
1175 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1177 /* Add to sockets internal pointer for fast referencing */
1178 silc_free(sock->user_data);
1179 sock->user_data = id_entry;
1181 /* Connection has been fully established now. Everything is ok. */
1182 SILC_LOG_DEBUG(("New connection authenticated"));
1184 /* Perform keepalive. The `hb_context' will be freed automatically
1185 when finally calling the silc_socket_free function. XXX hardcoded
1187 hb_context = silc_calloc(1, sizeof(*hb_context));
1188 hb_context->server = server;
1189 silc_socket_set_heartbeat(sock, 600, hb_context,
1190 silc_server_perform_heartbeat,
1191 server->timeout_queue);
1193 silc_protocol_free(protocol);
1195 silc_packet_context_free(ctx->packet);
1197 silc_ske_free(ctx->ske);
1199 silc_free(ctx->dest_id);
1201 sock->protocol = NULL;
1204 /* This function is used to read packets from network and send packets to
1205 network. This is usually a generic task. */
1207 SILC_TASK_CALLBACK(silc_server_packet_process)
1209 SilcServer server = (SilcServer)context;
1210 SilcSocketConnection sock = server->sockets[fd];
1211 SilcIDListData idata;
1212 SilcCipher cipher = NULL;
1213 SilcHmac hmac = NULL;
1219 SILC_LOG_DEBUG(("Processing packet"));
1221 /* Packet sending */
1223 if (type == SILC_TASK_WRITE) {
1224 /* Do not send data to disconnected connection */
1225 if (SILC_IS_DISCONNECTED(sock))
1228 server->stat.packets_sent++;
1230 if (sock->outbuf->data - sock->outbuf->head)
1231 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1233 ret = silc_server_packet_send_real(server, sock, TRUE);
1235 /* If returned -2 could not write to connection now, will do
1243 /* The packet has been sent and now it is time to set the connection
1244 back to only for input. When there is again some outgoing data
1245 available for this connection it will be set for output as well.
1246 This call clears the output setting and sets it only for input. */
1247 SILC_SET_CONNECTION_FOR_INPUT(fd);
1248 SILC_UNSET_OUTBUF_PENDING(sock);
1250 silc_buffer_clear(sock->outbuf);
1254 /* Packet receiving */
1256 /* Read some data from connection */
1257 ret = silc_packet_receive(sock);
1263 SILC_LOG_DEBUG(("Read EOF"));
1265 /* If connection is disconnecting already we will finally
1266 close the connection */
1267 if (SILC_IS_DISCONNECTING(sock)) {
1268 if (sock->user_data)
1269 silc_server_free_sock_user_data(server, sock);
1270 silc_server_close_connection(server, sock);
1274 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1275 SILC_SET_DISCONNECTING(sock);
1277 /* If the closed connection was our primary router connection the
1278 start re-connecting phase. */
1279 if (!server->standalone && server->server_type == SILC_SERVER &&
1280 sock == server->router->connection)
1281 silc_task_register(server->timeout_queue, 0,
1282 silc_server_connect_to_router,
1285 SILC_TASK_PRI_NORMAL);
1287 if (sock->user_data)
1288 silc_server_free_sock_user_data(server, sock);
1289 silc_server_close_connection(server, sock);
1293 /* If connection is disconnecting or disconnected we will ignore
1295 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1296 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1300 server->stat.packets_received++;
1302 /* Get keys and stuff from ID entry */
1303 idata = (SilcIDListData)sock->user_data;
1305 idata->last_receive = time(NULL);
1306 cipher = idata->receive_key;
1310 /* Process the packet. This will call the parser that will then
1311 decrypt and parse the packet. */
1312 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1316 /* Parses whole packet, received earlier. */
1318 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1320 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1321 SilcServer server = (SilcServer)parse_ctx->context;
1322 SilcSocketConnection sock = parse_ctx->sock;
1323 SilcPacketContext *packet = parse_ctx->packet;
1326 SILC_LOG_DEBUG(("Start"));
1328 /* Decrypt the received packet */
1329 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1330 packet->buffer, packet);
1335 /* Parse the packet. Packet type is returned. */
1336 ret = silc_packet_parse(packet);
1338 /* Parse the packet header in special way as this is "special"
1340 ret = silc_packet_parse_special(packet);
1343 if (ret == SILC_PACKET_NONE)
1346 if (server->server_type == SILC_ROUTER) {
1347 /* Route the packet if it is not destined to us. Other ID types but
1348 server are handled separately after processing them. */
1349 if (packet->dst_id_type == SILC_ID_SERVER &&
1350 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1351 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1353 /* Route the packet to fastest route for the destination ID */
1354 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1355 packet->dst_id_type);
1358 silc_server_packet_route(server,
1359 silc_server_route_get(server, id,
1360 packet->dst_id_type),
1366 /* Broadcast packet if it is marked as broadcast packet and it is
1367 originated from router and we are router. */
1368 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1369 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1370 silc_server_packet_broadcast(server, server->router->connection, packet);
1374 /* Parse the incoming packet type */
1375 silc_server_packet_parse_type(server, sock, packet);
1378 silc_buffer_clear(sock->inbuf);
1379 silc_packet_context_free(packet);
1380 silc_free(parse_ctx);
1383 /* Parser callback called by silc_packet_receive_process. This merely
1384 registers timeout that will handle the actual parsing when appropriate. */
1386 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1388 SilcServer server = (SilcServer)parser_context->context;
1389 SilcSocketConnection sock = parser_context->sock;
1391 switch (sock->type) {
1392 case SILC_SOCKET_TYPE_CLIENT:
1393 case SILC_SOCKET_TYPE_UNKNOWN:
1394 /* Parse the packet with timeout */
1395 silc_task_register(server->timeout_queue, sock->sock,
1396 silc_server_packet_parse_real,
1397 (void *)parser_context, 0, 100000,
1399 SILC_TASK_PRI_NORMAL);
1401 case SILC_SOCKET_TYPE_SERVER:
1402 case SILC_SOCKET_TYPE_ROUTER:
1403 /* Packets from servers are parsed as soon as possible */
1404 silc_task_register(server->timeout_queue, sock->sock,
1405 silc_server_packet_parse_real,
1406 (void *)parser_context, 0, 1,
1408 SILC_TASK_PRI_NORMAL);
1415 /* Parses the packet type and calls what ever routines the packet type
1416 requires. This is done for all incoming packets. */
1418 void silc_server_packet_parse_type(SilcServer server,
1419 SilcSocketConnection sock,
1420 SilcPacketContext *packet)
1422 SilcPacketType type = packet->type;
1424 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1426 /* Parse the packet type */
1428 case SILC_PACKET_DISCONNECT:
1429 SILC_LOG_DEBUG(("Disconnect packet"));
1432 case SILC_PACKET_SUCCESS:
1434 * Success received for something. For now we can have only
1435 * one protocol for connection executing at once hence this
1436 * success message is for whatever protocol is executing currently.
1438 SILC_LOG_DEBUG(("Success packet"));
1439 if (sock->protocol) {
1440 sock->protocol->execute(server->timeout_queue, 0,
1441 sock->protocol, sock->sock, 0, 0);
1445 case SILC_PACKET_FAILURE:
1447 * Failure received for something. For now we can have only
1448 * one protocol for connection executing at once hence this
1449 * failure message is for whatever protocol is executing currently.
1451 SILC_LOG_DEBUG(("Failure packet"));
1452 if (sock->protocol) {
1453 /* XXX Audit the failure type */
1454 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1455 sock->protocol->execute(server->timeout_queue, 0,
1456 sock->protocol, sock->sock, 0, 0);
1460 case SILC_PACKET_REJECT:
1461 SILC_LOG_DEBUG(("Reject packet"));
1465 case SILC_PACKET_NOTIFY:
1467 * Received notify packet. Server can receive notify packets from
1468 * router. Server then relays the notify messages to clients if needed.
1470 SILC_LOG_DEBUG(("Notify packet"));
1471 silc_server_notify(server, sock, packet);
1477 case SILC_PACKET_CHANNEL_MESSAGE:
1479 * Received channel message. Channel messages are special packets
1480 * (although probably most common ones) thus they are handled
1483 SILC_LOG_DEBUG(("Channel Message packet"));
1484 silc_server_channel_message(server, sock, packet);
1487 case SILC_PACKET_CHANNEL_KEY:
1489 * Received key for channel. As channels are created by the router
1490 * the keys are as well. We will distribute the key to all of our
1491 * locally connected clients on the particular channel. Router
1492 * never receives this channel and thus is ignored.
1494 SILC_LOG_DEBUG(("Channel Key packet"));
1495 silc_server_channel_key(server, sock, packet);
1501 case SILC_PACKET_COMMAND:
1503 * Recived command. Processes the command request and allocates the
1504 * command context and calls the command.
1506 SILC_LOG_DEBUG(("Command packet"));
1507 silc_server_command_process(server, sock, packet);
1510 case SILC_PACKET_COMMAND_REPLY:
1512 * Received command reply packet. Received command reply to command. It
1513 * may be reply to command sent by us or reply to command sent by client
1514 * that we've routed further.
1516 SILC_LOG_DEBUG(("Command Reply packet"));
1517 silc_server_command_reply(server, sock, packet);
1521 * Private Message packets
1523 case SILC_PACKET_PRIVATE_MESSAGE:
1525 * Received private message packet. The packet is coming from either
1528 SILC_LOG_DEBUG(("Private Message packet"));
1529 silc_server_private_message(server, sock, packet);
1532 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1534 * Private message key packet.
1539 * Key Exchange protocol packets
1541 case SILC_PACKET_KEY_EXCHANGE:
1542 SILC_LOG_DEBUG(("KE packet"));
1543 if (sock->protocol && sock->protocol->protocol->type
1544 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1546 SilcServerKEInternalContext *proto_ctx =
1547 (SilcServerKEInternalContext *)sock->protocol->context;
1549 proto_ctx->packet = silc_packet_context_dup(packet);
1551 /* Let the protocol handle the packet */
1552 sock->protocol->execute(server->timeout_queue, 0,
1553 sock->protocol, sock->sock, 0, 100000);
1555 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1556 "protocol active, packet dropped."));
1558 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1562 case SILC_PACKET_KEY_EXCHANGE_1:
1563 SILC_LOG_DEBUG(("KE 1 packet"));
1564 if (sock->protocol && sock->protocol->protocol->type
1565 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1567 SilcServerKEInternalContext *proto_ctx =
1568 (SilcServerKEInternalContext *)sock->protocol->context;
1570 if (proto_ctx->packet)
1571 silc_packet_context_free(proto_ctx->packet);
1573 proto_ctx->packet = silc_packet_context_dup(packet);
1574 proto_ctx->dest_id_type = packet->src_id_type;
1575 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1576 packet->src_id_type);
1577 if (!proto_ctx->dest_id)
1580 /* Let the protocol handle the packet */
1581 sock->protocol->execute(server->timeout_queue, 0,
1582 sock->protocol, sock->sock,
1585 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1586 "protocol active, packet dropped."));
1590 case SILC_PACKET_KEY_EXCHANGE_2:
1591 SILC_LOG_DEBUG(("KE 2 packet"));
1592 if (sock->protocol && sock->protocol->protocol->type
1593 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1595 SilcServerKEInternalContext *proto_ctx =
1596 (SilcServerKEInternalContext *)sock->protocol->context;
1598 if (proto_ctx->packet)
1599 silc_packet_context_free(proto_ctx->packet);
1601 proto_ctx->packet = silc_packet_context_dup(packet);
1602 proto_ctx->dest_id_type = packet->src_id_type;
1603 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1604 packet->src_id_type);
1605 if (!proto_ctx->dest_id)
1608 /* Let the protocol handle the packet */
1609 sock->protocol->execute(server->timeout_queue, 0,
1610 sock->protocol, sock->sock,
1613 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1614 "protocol active, packet dropped."));
1618 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1620 * Connection authentication request packet. When we receive this packet
1621 * we will send to the other end information about our mandatory
1622 * authentication method for the connection. This packet maybe received
1625 SILC_LOG_DEBUG(("Connection authentication request packet"));
1629 * Connection Authentication protocol packets
1631 case SILC_PACKET_CONNECTION_AUTH:
1632 /* Start of the authentication protocol. We receive here the
1633 authentication data and will verify it. */
1634 SILC_LOG_DEBUG(("Connection auth packet"));
1635 if (sock->protocol && sock->protocol->protocol->type
1636 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1638 SilcServerConnAuthInternalContext *proto_ctx =
1639 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1641 proto_ctx->packet = silc_packet_context_dup(packet);
1643 /* Let the protocol handle the packet */
1644 sock->protocol->execute(server->timeout_queue, 0,
1645 sock->protocol, sock->sock, 0, 0);
1647 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1648 "protocol active, packet dropped."));
1652 case SILC_PACKET_NEW_ID:
1654 * Received New ID packet. This includes some new ID that has been
1655 * created. It may be for client, server or channel. This is the way
1656 * to distribute information about new registered entities in the
1659 SILC_LOG_DEBUG(("New ID packet"));
1660 silc_server_new_id(server, sock, packet);
1663 case SILC_PACKET_NEW_ID_LIST:
1665 * Received list of ID's. This packet is used by servers and routers
1666 * to notify their primary router about clients and servers they have.
1668 SILC_LOG_DEBUG(("New ID List packet"));
1669 silc_server_new_id_list(server, sock, packet);
1672 case SILC_PACKET_NEW_CLIENT:
1674 * Received new client packet. This includes client information that
1675 * we will use to create initial client ID. After creating new
1676 * ID we will send it to the client.
1678 SILC_LOG_DEBUG(("New Client packet"));
1679 silc_server_new_client(server, sock, packet);
1682 case SILC_PACKET_NEW_SERVER:
1684 * Received new server packet. This includes Server ID and some other
1685 * information that we may save. This is received after server has
1688 SILC_LOG_DEBUG(("New Server packet"));
1689 silc_server_new_server(server, sock, packet);
1692 case SILC_PACKET_NEW_CHANNEL:
1694 * Received new channel packet. Information about new channel in the
1695 * network are distributed using this packet.
1697 SILC_LOG_DEBUG(("New Channel packet"));
1698 silc_server_new_channel(server, sock, packet);
1701 case SILC_PACKET_NEW_CHANNEL_USER:
1703 * Received new channel user packet. Information about new users on a
1704 * channel are distributed between routers using this packet. The
1705 * router receiving this will redistribute it and also sent JOIN notify
1706 * to local clients on the same channel. Normal server sends JOIN notify
1707 * to its local clients on the channel.
1709 SILC_LOG_DEBUG(("New Channel User packet"));
1710 silc_server_new_channel_user(server, sock, packet);
1713 case SILC_PACKET_NEW_CHANNEL_LIST:
1715 * List of new channel packets received. This is usually received when
1716 * existing server or router connects to us and distributes information
1717 * of all channels it has.
1719 SILC_LOG_DEBUG(("New Channel List packet"));
1720 silc_server_new_channel_list(server, sock, packet);
1723 case SILC_PACKET_NEW_CHANNEL_USER_LIST:
1725 * List of new channel user packets received. This is usually received
1726 * when existing server or router connects to us and distributes
1727 * information of all channel users it has.
1729 SILC_LOG_DEBUG(("New Channel User List packet"));
1730 silc_server_new_channel_user_list(server, sock, packet);
1733 case SILC_PACKET_REPLACE_ID:
1735 * Received replace ID packet. This sends the old ID that is to be
1736 * replaced with the new one included into the packet. Client must not
1739 SILC_LOG_DEBUG(("Replace ID packet"));
1740 silc_server_replace_id(server, sock, packet);
1743 case SILC_PACKET_REMOVE_ID:
1745 * Received remove ID Packet.
1747 SILC_LOG_DEBUG(("Remove ID packet"));
1748 silc_server_remove_id(server, sock, packet);
1751 case SILC_PACKET_REMOVE_CHANNEL_USER:
1753 * Received packet to remove user from a channel. Routers notify other
1754 * routers about a user leaving a channel.
1756 SILC_LOG_DEBUG(("Remove Channel User packet"));
1757 silc_server_remove_channel_user(server, sock, packet);
1760 case SILC_PACKET_SET_MODE:
1762 * Received packet to set the mode of channel or client's channel mode.
1764 SILC_LOG_DEBUG(("Set Mode packet"));
1765 silc_server_set_mode(server, sock, packet);
1768 case SILC_PACKET_HEARTBEAT:
1770 * Received heartbeat.
1772 SILC_LOG_DEBUG(("Heartbeat packet"));
1776 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1782 /* Closes connection to socket connection */
1784 void silc_server_close_connection(SilcServer server,
1785 SilcSocketConnection sock)
1787 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1789 /* We won't listen for this connection anymore */
1790 silc_schedule_unset_listen_fd(sock->sock);
1792 /* Unregister all tasks */
1793 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1794 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1796 /* Close the actual connection */
1797 silc_net_close_connection(sock->sock);
1798 server->sockets[sock->sock] = NULL;
1799 silc_socket_free(sock);
1802 /* Sends disconnect message to remote connection and disconnects the
1805 void silc_server_disconnect_remote(SilcServer server,
1806 SilcSocketConnection sock,
1807 const char *fmt, ...)
1810 unsigned char buf[4096];
1815 memset(buf, 0, sizeof(buf));
1817 vsprintf(buf, fmt, ap);
1820 SILC_LOG_DEBUG(("Disconnecting remote host"));
1822 /* Notify remote end that the conversation is over. The notify message
1823 is tried to be sent immediately. */
1824 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1825 buf, strlen(buf), TRUE);
1827 /* Mark the connection to be disconnected */
1828 SILC_SET_DISCONNECTED(sock);
1829 silc_server_close_connection(server, sock);
1832 /* Free's user_data pointer from socket connection object. This also sends
1833 appropriate notify packets to the network to inform about leaving
1836 void silc_server_free_sock_user_data(SilcServer server,
1837 SilcSocketConnection sock)
1839 SILC_LOG_DEBUG(("Start"));
1841 switch(sock->type) {
1842 case SILC_SOCKET_TYPE_CLIENT:
1844 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
1846 /* Remove client from all channels */
1847 silc_server_remove_from_channels(server, sock, user_data);
1849 /* XXX must take some info to history before freeing */
1851 /* Send REMOVE_ID packet to routers. */
1852 if (!server->standalone && server->router)
1853 silc_server_send_remove_id(server, server->router->connection,
1854 server->server_type == SILC_SERVER ?
1855 FALSE : TRUE, user_data->id,
1856 SILC_ID_CLIENT_LEN, SILC_ID_CLIENT);
1858 /* Free the client entry and everything in it */
1859 silc_idlist_del_data(user_data);
1860 silc_idlist_del_client(server->local_list, user_data);
1861 server->stat.my_clients--;
1862 server->stat.clients--;
1863 if (server->server_type == SILC_ROUTER)
1864 server->stat.cell_clients--;
1867 case SILC_SOCKET_TYPE_SERVER:
1868 case SILC_SOCKET_TYPE_ROUTER:
1870 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
1872 /* Send REMOVE_ID packet to routers. */
1873 if (!server->standalone && server->router)
1874 silc_server_send_remove_id(server, server->router->connection,
1875 server->server_type == SILC_SERVER ?
1876 FALSE : TRUE, user_data->id,
1877 SILC_ID_SERVER_LEN, SILC_ID_SERVER);
1879 /* Then also free all client entries that this server owns as
1880 they will become invalid now as well. */
1881 silc_server_remove_clients_by_server(server, user_data);
1883 /* If this was our primary router connection then we're lost to
1884 the outside world. */
1885 if (server->server_type == SILC_SERVER && server->router == user_data) {
1886 server->id_entry->router = NULL;
1887 server->router = NULL;
1888 server->standalone = TRUE;
1891 /* Free the server entry */
1892 silc_idlist_del_data(user_data);
1893 silc_idlist_del_server(server->local_list, user_data);
1894 server->stat.my_servers--;
1895 server->stat.servers--;
1896 if (server->server_type == SILC_ROUTER)
1897 server->stat.cell_servers--;
1902 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
1904 silc_idlist_del_data(user_data);
1905 silc_free(user_data);
1910 sock->user_data = NULL;
1913 /* This function is used to remove all client entries by the server `entry'.
1914 This is called when the connection is lost to the server. In this case
1915 we must invalidate all the client entries owned by the server `entry'. */
1917 int silc_server_remove_clients_by_server(SilcServer server,
1918 SilcServerEntry entry)
1920 SilcIDCacheList list = NULL;
1921 SilcIDCacheEntry id_cache = NULL;
1922 SilcClientEntry client = NULL;
1924 if (silc_idcache_find_by_id(server->local_list->clients,
1925 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1927 if (silc_idcache_list_first(list, &id_cache)) {
1929 client = (SilcClientEntry)id_cache->context;
1931 if (client->router != entry) {
1932 if (!silc_idcache_list_next(list, &id_cache))
1938 /* Remove the client entry */
1939 silc_server_remove_from_channels(server, NULL, client);
1940 silc_idlist_del_client(server->local_list, client);
1942 if (!silc_idcache_list_next(list, &id_cache))
1946 silc_idcache_list_free(list);
1949 if (silc_idcache_find_by_id(server->global_list->clients,
1950 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1952 if (silc_idcache_list_first(list, &id_cache)) {
1954 client = (SilcClientEntry)id_cache->context;
1956 if (client->router != entry) {
1957 if (!silc_idcache_list_next(list, &id_cache))
1963 /* Remove the client entry */
1964 silc_server_remove_from_channels(server, NULL, client);
1965 silc_idlist_del_client(server->global_list, client);
1967 if (!silc_idcache_list_next(list, &id_cache))
1971 silc_idcache_list_free(list);
1977 /* Checks whether given channel has global users. If it does this returns
1978 TRUE and FALSE if there is only locally connected clients on the channel. */
1980 int silc_server_channel_has_global(SilcChannelEntry channel)
1982 SilcChannelClientEntry chl;
1984 silc_list_start(channel->user_list);
1985 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1986 if (chl->client->router)
1993 /* Checks whether given channel has locally connected users. If it does this
1994 returns TRUE and FALSE if there is not one locally connected client. */
1996 int silc_server_channel_has_local(SilcChannelEntry channel)
1998 SilcChannelClientEntry chl;
2000 silc_list_start(channel->user_list);
2001 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2002 if (!chl->client->router)
2009 /* Removes client from all channels it has joined. This is used when client
2010 connection is disconnected. If the client on a channel is last, the
2011 channel is removed as well. This sends the SIGNOFF notify types. */
2013 void silc_server_remove_from_channels(SilcServer server,
2014 SilcSocketConnection sock,
2015 SilcClientEntry client)
2017 SilcChannelEntry channel;
2018 SilcChannelClientEntry chl;
2021 SILC_LOG_DEBUG(("Start"));
2023 if (!client || !client->id)
2026 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2028 /* Remove the client from all channels. The client is removed from
2029 the channels' user list. */
2030 silc_list_start(client->channels);
2031 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2032 channel = chl->channel;
2034 /* Remove channel from client's channel list */
2035 silc_list_del(client->channels, chl);
2037 /* Remove channel if there is no users anymore */
2038 if (server->server_type == SILC_ROUTER &&
2039 silc_list_count(channel->user_list) < 2) {
2040 if (!silc_idlist_del_channel(server->local_list, channel))
2041 silc_idlist_del_channel(server->global_list, channel);
2042 server->stat.my_channels--;
2046 /* Remove client from channel's client list */
2047 silc_list_del(channel->user_list, chl);
2049 server->stat.my_chanclients--;
2051 /* If there is not at least one local user on the channel then we don't
2052 need the channel entry anymore, we can remove it safely. */
2053 if (server->server_type == SILC_SERVER &&
2054 !silc_server_channel_has_local(channel)) {
2055 /* Notify about leaving client if this channel has global users. */
2056 if (channel->global_users)
2057 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2058 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2059 clidp->data, clidp->len);
2061 if (!silc_idlist_del_channel(server->local_list, channel))
2062 silc_idlist_del_channel(server->global_list, channel);
2063 server->stat.my_channels--;
2067 /* Send notify to channel about client leaving SILC and thus
2068 the entire channel. */
2069 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2070 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2071 clidp->data, clidp->len);
2074 silc_buffer_free(clidp);
2077 /* Removes client from one channel. This is used for example when client
2078 calls LEAVE command to remove itself from the channel. Returns TRUE
2079 if channel still exists and FALSE if the channel is removed when
2080 last client leaves the channel. If `notify' is FALSE notify messages
2083 int silc_server_remove_from_one_channel(SilcServer server,
2084 SilcSocketConnection sock,
2085 SilcChannelEntry channel,
2086 SilcClientEntry client,
2089 SilcChannelEntry ch;
2090 SilcChannelClientEntry chl;
2093 SILC_LOG_DEBUG(("Start"));
2095 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2097 /* Remove the client from the channel. The client is removed from
2098 the channel's user list. */
2099 silc_list_start(client->channels);
2100 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2101 if (chl->channel != channel)
2106 /* Remove channel from client's channel list */
2107 silc_list_del(client->channels, chl);
2109 /* Remove channel if there is no users anymore */
2110 if (server->server_type == SILC_ROUTER &&
2111 silc_list_count(channel->user_list) < 2) {
2112 if (!silc_idlist_del_channel(server->local_list, channel))
2113 silc_idlist_del_channel(server->global_list, channel);
2114 silc_buffer_free(clidp);
2115 server->stat.my_channels--;
2119 /* Remove client from channel's client list */
2120 silc_list_del(channel->user_list, chl);
2122 server->stat.my_chanclients--;
2124 /* If there is no global users on the channel anymore mark the channel
2125 as local channel. */
2126 if (server->server_type == SILC_SERVER &&
2127 !silc_server_channel_has_global(channel))
2128 channel->global_users = FALSE;
2130 /* If there is not at least one local user on the channel then we don't
2131 need the channel entry anymore, we can remove it safely. */
2132 if (server->server_type == SILC_SERVER &&
2133 !silc_server_channel_has_local(channel)) {
2134 /* Notify about leaving client if this channel has global users. */
2135 if (notify && channel->global_users)
2136 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2137 SILC_NOTIFY_TYPE_LEAVE, 1,
2138 clidp->data, clidp->len);
2140 if (!silc_idlist_del_channel(server->local_list, channel))
2141 silc_idlist_del_channel(server->global_list, channel);
2142 silc_buffer_free(clidp);
2143 server->stat.my_channels--;
2147 /* Send notify to channel about client leaving the channel */
2149 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2150 SILC_NOTIFY_TYPE_LEAVE, 1,
2151 clidp->data, clidp->len);
2155 silc_buffer_free(clidp);
2159 /* Returns TRUE if the given client is on the channel. FALSE if not.
2160 This works because we assure that the user list on the channel is
2161 always in up to date thus we can only check the channel list from
2162 `client' which is faster than checking the user list from `channel'. */
2164 int silc_server_client_on_channel(SilcClientEntry client,
2165 SilcChannelEntry channel)
2167 SilcChannelClientEntry chl;
2169 if (!client || !channel)
2172 silc_list_start(client->channels);
2173 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2174 if (chl->channel == channel)
2180 /* Timeout callback. This is called if connection is idle or for some
2181 other reason is not responding within some period of time. This
2182 disconnects the remote end. */
2184 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2186 SilcServer server = (SilcServer)context;
2187 SilcSocketConnection sock = server->sockets[fd];
2192 if (sock->user_data)
2193 silc_server_free_sock_user_data(server, sock);
2195 silc_server_disconnect_remote(server, sock,
2196 "Server closed connection: "
2197 "Connection timeout");
2200 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2201 function may be used only by router. In real SILC network all channels
2202 are created by routers thus this function is never used by normal
2205 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2206 SilcServerID *router_id,
2211 SilcChannelID *channel_id;
2212 SilcChannelEntry entry;
2215 SILC_LOG_DEBUG(("Creating new channel"));
2220 /* Allocate cipher */
2221 silc_cipher_alloc(cipher, &key);
2223 channel_name = strdup(channel_name);
2225 /* Create the channel */
2226 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2227 entry = silc_idlist_add_channel(server->local_list, channel_name,
2228 SILC_CHANNEL_MODE_NONE, channel_id,
2231 silc_free(channel_name);
2235 /* Now create the actual key material */
2236 silc_server_create_channel_key(server, entry, 16);
2238 /* Notify other routers about the new channel. We send the packet
2239 to our primary route. */
2240 if (broadcast && server->standalone == FALSE) {
2241 silc_server_send_new_channel(server, server->router->connection, TRUE,
2242 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2245 server->stat.my_channels++;
2250 /* Same as above but creates the channel with Channel ID `channel_id. */
2253 silc_server_create_new_channel_with_id(SilcServer server,
2256 SilcChannelID *channel_id,
2259 SilcChannelEntry entry;
2262 SILC_LOG_DEBUG(("Creating new channel"));
2267 /* Allocate cipher */
2268 silc_cipher_alloc(cipher, &key);
2270 channel_name = strdup(channel_name);
2272 /* Create the channel */
2273 entry = silc_idlist_add_channel(server->local_list, channel_name,
2274 SILC_CHANNEL_MODE_NONE, channel_id,
2277 silc_free(channel_name);
2281 /* Now create the actual key material */
2282 silc_server_create_channel_key(server, entry, 16);
2284 /* Notify other routers about the new channel. We send the packet
2285 to our primary route. */
2286 if (broadcast && server->standalone == FALSE) {
2287 silc_server_send_new_channel(server, server->router->connection, TRUE,
2288 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2291 server->stat.my_channels++;
2296 /* Generates new channel key. This is used to create the initial channel key
2297 but also to re-generate new key for channel. If `key_len' is provided
2298 it is the bytes of the key length. */
2300 void silc_server_create_channel_key(SilcServer server,
2301 SilcChannelEntry channel,
2302 unsigned int key_len)
2305 unsigned char channel_key[32];
2308 if (!channel->channel_key)
2309 silc_cipher_alloc("twofish", &channel->channel_key);
2313 else if (channel->key_len)
2314 len = channel->key_len / 8;
2316 len = sizeof(channel_key);
2318 /* Create channel key */
2319 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2322 channel->channel_key->cipher->set_key(channel->channel_key->context,
2325 /* Remove old key if exists */
2327 memset(channel->key, 0, channel->key_len / 8);
2328 silc_free(channel->key);
2332 channel->key_len = len * 8;
2333 channel->key = silc_calloc(len, sizeof(*channel->key));
2334 memcpy(channel->key, channel_key, len);
2335 memset(channel_key, 0, sizeof(channel_key));
2338 /* Saves the channel key found in the encoded `key_payload' buffer. This
2339 function is used when we receive Channel Key Payload and also when we're
2340 processing JOIN command reply. Returns entry to the channel. */
2342 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2343 SilcBuffer key_payload,
2344 SilcChannelEntry channel)
2346 SilcChannelKeyPayload payload = NULL;
2347 SilcChannelID *id = NULL;
2349 unsigned int tmp_len;
2352 /* Decode channel key payload */
2353 payload = silc_channel_key_payload_parse(key_payload);
2355 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2360 /* Get the channel entry */
2363 /* Get channel ID */
2364 tmp = silc_channel_key_get_id(payload, &tmp_len);
2365 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2371 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2373 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2375 SILC_LOG_ERROR(("Received key for non-existent channel"));
2381 tmp = silc_channel_key_get_key(payload, &tmp_len);
2387 cipher = silc_channel_key_get_cipher(payload, NULL);;
2393 /* Remove old key if exists */
2395 memset(channel->key, 0, channel->key_len / 8);
2396 silc_free(channel->key);
2397 silc_cipher_free(channel->channel_key);
2400 /* Create new cipher */
2401 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2407 channel->key_len = tmp_len * 8;
2408 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2409 memcpy(channel->key, tmp, tmp_len);
2410 channel->channel_key->cipher->set_key(channel->channel_key->context,
2417 silc_channel_key_payload_free(payload);
2422 /* Heartbeat callback. This function is set as argument for the
2423 silc_socket_set_heartbeat function. The library will call this function
2424 at the set time interval. */
2426 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2429 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2431 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2434 /* Send the heartbeat */
2435 silc_server_send_heartbeat(hb->server, sock);
2438 /* Returns assembled of all servers in the given ID list. The packet's
2439 form is dictated by the New ID payload. */
2441 static void silc_server_announce_get_servers(SilcServer server,
2443 SilcBuffer *servers)
2445 SilcIDCacheList list;
2446 SilcIDCacheEntry id_cache;
2447 SilcServerEntry entry;
2450 /* Go through all clients in the list */
2451 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2452 SILC_ID_SERVER, &list)) {
2453 if (silc_idcache_list_first(list, &id_cache)) {
2455 entry = (SilcServerEntry)id_cache->context;
2457 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2459 *servers = silc_buffer_realloc(*servers,
2461 (*servers)->truelen + idp->len :
2463 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2464 silc_buffer_put(*servers, idp->data, idp->len);
2465 silc_buffer_pull(*servers, idp->len);
2466 silc_buffer_free(idp);
2468 if (!silc_idcache_list_next(list, &id_cache))
2473 silc_idcache_list_free(list);
2477 /* This function is used by router to announce existing servers to our
2478 primary router when we've connected to it. */
2480 void silc_server_announce_servers(SilcServer server)
2482 SilcBuffer servers = NULL;
2484 SILC_LOG_DEBUG(("Announcing servers"));
2486 /* Get servers in local list */
2487 silc_server_announce_get_servers(server, server->local_list, &servers);
2489 /* Get servers in global list */
2490 silc_server_announce_get_servers(server, server->global_list, &servers);
2493 silc_buffer_push(servers, servers->data - servers->head);
2494 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2496 /* Send the packet */
2497 silc_server_packet_send(server, server->router->connection,
2498 SILC_PACKET_NEW_ID_LIST, 0,
2499 servers->data, servers->len, TRUE);
2501 silc_buffer_free(servers);
2505 /* Returns assembled packet of all clients in the given ID list. The
2506 packet's form is dictated by the New ID Payload. */
2508 static void silc_server_announce_get_clients(SilcServer server,
2510 SilcBuffer *clients)
2512 SilcIDCacheList list;
2513 SilcIDCacheEntry id_cache;
2514 SilcClientEntry client;
2517 /* Go through all clients in the list */
2518 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2519 SILC_ID_CLIENT, &list)) {
2520 if (silc_idcache_list_first(list, &id_cache)) {
2522 client = (SilcClientEntry)id_cache->context;
2524 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2526 *clients = silc_buffer_realloc(*clients,
2528 (*clients)->truelen + idp->len :
2530 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2531 silc_buffer_put(*clients, idp->data, idp->len);
2532 silc_buffer_pull(*clients, idp->len);
2533 silc_buffer_free(idp);
2535 if (!silc_idcache_list_next(list, &id_cache))
2540 silc_idcache_list_free(list);
2544 /* This function is used to announce our existing clients to our router
2545 when we've connected to it. */
2547 void silc_server_announce_clients(SilcServer server)
2549 SilcBuffer clients = NULL;
2551 SILC_LOG_DEBUG(("Announcing clients"));
2553 /* Get clients in local list */
2554 silc_server_announce_get_clients(server, server->local_list,
2557 /* As router we announce our global list as well */
2558 if (server->server_type == SILC_ROUTER)
2559 silc_server_announce_get_clients(server, server->global_list,
2563 silc_buffer_push(clients, clients->data - clients->head);
2564 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2566 /* Send the packet */
2567 silc_server_packet_send(server, server->router->connection,
2568 SILC_PACKET_NEW_ID_LIST, 0,
2569 clients->data, clients->len, TRUE);
2571 silc_buffer_free(clients);
2575 /* Returns assembled packets for all channels and users on those channels
2576 from the given ID List. The packets are in the form dictated by the
2577 New Channel and New Channel User payloads. */
2579 static void silc_server_announce_get_channels(SilcServer server,
2581 SilcBuffer *channels,
2582 SilcBuffer *channel_users)
2584 SilcIDCacheList list;
2585 SilcIDCacheEntry id_cache;
2586 SilcChannelEntry channel;
2587 SilcChannelClientEntry chl;
2589 unsigned short name_len;
2592 /* Go through all channels in the list */
2593 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2594 SILC_ID_CHANNEL, &list)) {
2595 if (silc_idcache_list_first(list, &id_cache)) {
2597 channel = (SilcChannelEntry)id_cache->context;
2599 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2600 name_len = strlen(channel->channel_name);
2602 len = 4 + name_len + SILC_ID_CHANNEL_LEN;
2604 silc_buffer_realloc(*channels,
2605 (*channels ? (*channels)->truelen + len : len));
2606 silc_buffer_pull_tail(*channels,
2607 ((*channels)->end - (*channels)->data));
2608 silc_buffer_format(*channels,
2609 SILC_STR_UI_SHORT(name_len),
2610 SILC_STR_UI_XNSTRING(channel->channel_name,
2612 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2613 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2615 silc_buffer_pull(*channels, len);
2617 /* Now find all users on the channel */
2618 silc_list_start(channel->user_list);
2619 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2620 unsigned char *clid;
2622 clid = silc_id_id2str(chl->client->id, SILC_ID_CLIENT);
2624 len = 4 + SILC_ID_CHANNEL_LEN + SILC_ID_CLIENT_LEN;
2626 silc_buffer_realloc(*channel_users,
2628 (*channel_users)->truelen + len : len));
2629 silc_buffer_pull_tail(*channel_users,
2630 ((*channel_users)->end -
2631 (*channel_users)->data));
2632 silc_buffer_format(*channel_users,
2633 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2634 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2635 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
2636 SILC_STR_UI_XNSTRING(clid, SILC_ID_CLIENT_LEN),
2638 silc_buffer_pull(*channel_users, len);
2644 if (!silc_idcache_list_next(list, &id_cache))
2649 silc_idcache_list_free(list);
2653 /* This function is used to announce our existing channels to our router
2654 when we've connected to it. This also announces the users on the
2655 channels to the router. */
2657 void silc_server_announce_channels(SilcServer server)
2659 SilcBuffer channels = NULL, channel_users = NULL;
2661 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2663 /* Get channels and channel users in local list */
2664 silc_server_announce_get_channels(server, server->local_list,
2665 &channels, &channel_users);
2667 /* Get channels and channel users in global list */
2668 silc_server_announce_get_channels(server, server->global_list,
2669 &channels, &channel_users);
2672 silc_buffer_push(channels, channels->data - channels->head);
2673 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2675 /* Send the packet */
2676 silc_server_packet_send(server, server->router->connection,
2677 SILC_PACKET_NEW_CHANNEL_LIST, 0,
2678 channels->data, channels->len,
2681 silc_buffer_free(channels);
2684 if (channel_users) {
2685 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2686 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2687 channel_users->len);
2689 /* Send the packet */
2690 silc_server_packet_send(server, server->router->connection,
2691 SILC_PACKET_NEW_CHANNEL_USER_LIST, 0,
2692 channel_users->data, channel_users->len,
2695 silc_buffer_free(channel_users);