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);
103 /* Initializes the entire SILC server. This is called always before running
104 the server. This is called only once at the initialization of the program.
105 This binds the server to its listenning port. After this function returns
106 one should call silc_server_run to start the server. This returns TRUE
107 when everything is ok to run the server. Configuration file must be
108 read and parsed before calling this. */
110 int silc_server_init(SilcServer server)
112 int *sock = NULL, sock_count = 0, i;
114 SilcServerEntry id_entry;
116 SILC_LOG_DEBUG(("Initializing server"));
118 assert(server->config);
120 /* XXX After server is made as Silc Server Library this can be given
121 as argument, for now this is hard coded */
122 server->params = silc_calloc(1, sizeof(*server->params));
123 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
124 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
125 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
126 server->params->retry_keep_trying = FALSE;
127 server->params->protocol_timeout = 60;
128 server->params->require_reverse_mapping = FALSE;
130 /* Set log files where log message should be saved. */
131 server->config->server = server;
132 silc_server_config_setlogfiles(server->config);
134 /* Register all configured ciphers, PKCS and hash functions. */
135 silc_server_config_register_ciphers(server->config);
136 silc_server_config_register_pkcs(server->config);
137 silc_server_config_register_hashfuncs(server->config);
139 /* Initialize random number generator for the server. */
140 server->rng = silc_rng_alloc();
141 silc_rng_init(server->rng);
142 silc_rng_global_init(server->rng);
144 /* Initialize hash functions for server to use */
145 silc_hash_alloc("md5", &server->md5hash);
146 silc_hash_alloc("sha1", &server->sha1hash);
148 /* Initialize none cipher */
149 silc_cipher_alloc("none", &server->none_cipher);
151 /* XXXXX Generate RSA key pair */
153 unsigned char *public_key;
154 unsigned char *private_key;
155 unsigned int pk_len, prv_len;
158 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
160 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
161 SILC_LOG_ERROR(("Could not create RSA key pair"));
165 if (server->pkcs->pkcs->init(server->pkcs->context,
166 1024, server->rng) == FALSE) {
167 SILC_LOG_ERROR(("Could not generate RSA key pair"));
171 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
173 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
176 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
177 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
180 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
182 server->private_key =
183 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
186 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
188 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
191 memset(public_key, 0, pk_len);
192 memset(private_key, 0, prv_len);
193 silc_free(public_key);
194 silc_free(private_key);
196 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
198 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
203 /* Create a listening server. Note that our server can listen on
204 multiple ports. All listeners are created here and now. */
205 /* XXX Still check this whether to use server_info or listen_port. */
207 while(server->config->listen_port) {
210 tmp = silc_net_create_server(server->config->listen_port->port,
211 server->config->listen_port->host);
215 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
216 sock[sock_count] = tmp;
217 server->config->listen_port = server->config->listen_port->next;
221 /* Initialize ID caches */
222 server->local_list->clients = silc_idcache_alloc(0);
223 server->local_list->servers = silc_idcache_alloc(0);
224 server->local_list->channels = silc_idcache_alloc(0);
226 /* These are allocated for normal server as well as these hold some
227 global information that the server has fetched from its router. For
228 router these are used as they are supposed to be used on router. */
229 server->global_list->clients = silc_idcache_alloc(0);
230 server->global_list->servers = silc_idcache_alloc(0);
231 server->global_list->channels = silc_idcache_alloc(0);
233 /* Allocate the entire socket list that is used in server. Eventually
234 all connections will have entry in this table (it is a table of
235 pointers to the actual object that is allocated individually
237 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
238 sizeof(*server->sockets));
240 for (i = 0; i < sock_count; i++) {
241 SilcSocketConnection newsocket = NULL;
243 /* Set socket to non-blocking mode */
244 silc_net_set_socket_nonblock(sock[i]);
245 server->sock = sock[i];
247 /* Create a Server ID for the server. */
248 silc_id_create_server_id(sock[i], server->rng, &id);
254 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
255 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
256 server->id_type = SILC_ID_SERVER;
257 server->server_name = server->config->server_info->server_name;
259 /* Add ourselves to the server list. We don't have a router yet
260 beacuse we haven't established a route yet. It will be done later.
261 For now, NULL is sent as router. This allocates new entry to
264 silc_idlist_add_server(server->local_list,
265 server->config->server_info->server_name,
266 server->server_type, server->id, NULL, NULL);
268 SILC_LOG_ERROR(("Could not add ourselves to cache"));
272 /* Add ourselves also to the socket table. The entry allocated above
273 is sent as argument for fast referencing in the future. */
274 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
279 server->sockets[sock[i]] = newsocket;
281 /* Put the allocated socket pointer also to the entry allocated above
282 for fast back-referencing to the socket list. */
283 id_entry->connection = (void *)server->sockets[sock[i]];
284 server->id_entry = id_entry;
287 /* Register the task queues. In SILC we have by default three task queues.
288 One task queue for non-timeout tasks which perform different kind of
289 I/O on file descriptors, timeout task queue for timeout tasks, and,
290 generic non-timeout task queue whose tasks apply to all connections. */
291 silc_task_queue_alloc(&server->io_queue, TRUE);
292 if (!server->io_queue) {
295 silc_task_queue_alloc(&server->timeout_queue, TRUE);
296 if (!server->timeout_queue) {
299 silc_task_queue_alloc(&server->generic_queue, TRUE);
300 if (!server->generic_queue) {
304 /* Register protocols */
305 silc_server_protocols_register();
307 /* Initialize the scheduler */
308 silc_schedule_init(&server->io_queue, &server->timeout_queue,
309 &server->generic_queue,
310 SILC_SERVER_MAX_CONNECTIONS);
312 /* Add the first task to the queue. This is task that is executed by
313 timeout. It expires as soon as the caller calls silc_server_run. This
314 task performs authentication protocol and key exchange with our
316 silc_task_register(server->timeout_queue, sock[0],
317 silc_server_connect_to_router,
318 (void *)server, 0, 1,
320 SILC_TASK_PRI_NORMAL);
322 /* Add listener task to the queue. This task receives new connections to the
323 server. This task remains on the queue until the end of the program. */
324 silc_task_register(server->io_queue, sock[0],
325 silc_server_accept_new_connection,
326 (void *)server, 0, 0,
328 SILC_TASK_PRI_NORMAL);
329 server->listenning = TRUE;
331 /* If server connections has been configured then we must be router as
332 normal server cannot have server connections, only router connections. */
333 if (server->config->servers)
334 server->server_type = SILC_ROUTER;
336 SILC_LOG_DEBUG(("Server initialized"));
338 /* We are done here, return succesfully */
341 silc_task_queue_free(server->timeout_queue);
343 silc_task_queue_free(server->io_queue);
345 for (i = 0; i < sock_count; i++)
346 silc_net_close_server(sock[i]);
351 /* Fork server to background and set gid+uid to non-root.
352 Silcd will not run as root, so trying to set either user or group to
353 root will cause silcd to exit. */
355 void silc_server_daemonise(SilcServer server)
357 /* Are we executing silcd as root or a regular user? */
364 if (!server->config->identity || !server->config->identity->user ||
365 !server->config->identity->group) {
366 fprintf(stderr, "Error:"
367 "\tSILC server must not be run as root. For the security of your\n"
368 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
369 "\tuser account. Modify the [Identity] configuration section to run\n"
370 "\tthe server as non-root user.\n");
374 /* Get the values given for user and group in configuration file */
375 user=server->config->identity->user;
376 group=server->config->identity->group;
378 /* Check whether the user/group information is text */
379 if (atoi(user)!=0 || atoi(group)!=0) {
380 SILC_LOG_DEBUG(("Invalid user and/or group information"));
381 SILC_LOG_DEBUG(("User and/or group given as number"));
382 fprintf(stderr, "Invalid user and/or group information\n");
383 fprintf(stderr, "Please assign them as names, not numbers\n");
387 /* Catch the nasty incident of string "0" returning 0 from atoi */
388 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
389 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
390 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
398 fprintf(stderr, "No such user %s found\n", user);
403 fprintf(stderr, "No such group %s found\n", group);
407 /* Check whether user and/or group is set to root. If yes, exit
408 immediately. Otherwise, setgid and setuid server to user.group */
409 if (gr->gr_gid==0 || pw->pw_uid==0) {
410 fprintf(stderr, "Error:"
411 "\tSILC server must not be run as root. For the security of your\n"
412 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
413 "\tuser account. Modify the [Identity] configuration section to run\n"
414 "\tthe server as non-root user.\n");
417 /* Fork server to background, making it a daemon */
419 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
420 SILC_LOG_DEBUG(("Forking SILC server to background"));
425 SILC_LOG_DEBUG(("Changing to group %s", group));
426 if(setgid(gr->gr_gid)==0) {
427 SILC_LOG_DEBUG(("Setgid to %s", group));
429 SILC_LOG_DEBUG(("Setgid to %s failed", group));
430 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
434 SILC_LOG_DEBUG(("Changing to user nobody"));
435 if(setuid(pw->pw_uid)==0) {
436 SILC_LOG_DEBUG(("Setuid to %s", user));
438 SILC_LOG_DEBUG(("Setuid to %s failed", user));
439 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
445 /* Fork server to background, making it a daemon */
447 SILC_LOG_DEBUG(("Server started as user"));
448 SILC_LOG_DEBUG(("Forking SILC server to background"));
455 /* Stops the SILC server. This function is used to shutdown the server.
456 This is usually called after the scheduler has returned. After stopping
457 the server one should call silc_server_free. */
459 void silc_server_stop(SilcServer server)
461 SILC_LOG_DEBUG(("Stopping server"));
463 /* Stop the scheduler, although it might be already stopped. This
464 doesn't hurt anyone. This removes all the tasks and task queues,
466 silc_schedule_stop();
467 silc_schedule_uninit();
469 silc_server_protocols_unregister();
471 SILC_LOG_DEBUG(("Server stopped"));
474 /* The heart of the server. This runs the scheduler thus runs the server.
475 When this returns the server has been stopped and the program will
478 void silc_server_run(SilcServer server)
480 SILC_LOG_DEBUG(("Running server"));
482 /* Start the scheduler, the heart of the SILC server. When this returns
483 the program will be terminated. */
487 /* Timeout callback that will be called to retry connecting to remote
488 router. This is used by both normal and router server. This will wait
489 before retrying the connecting. The timeout is generated by exponential
490 backoff algorithm. */
492 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
494 SilcServerConnection sconn = (SilcServerConnection)context;
495 SilcServer server = sconn->server;
497 SILC_LOG_INFO(("Retrying connecting to a router"));
499 /* Calculate next timeout */
500 if (sconn->retry_count >= 1) {
501 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
502 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
503 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
505 sconn->retry_timeout = server->params->retry_interval_min;
507 sconn->retry_count++;
508 sconn->retry_timeout = sconn->retry_timeout +
509 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
511 /* If we've reached max retry count, give up. */
512 if (sconn->retry_count > server->params->retry_count &&
513 server->params->retry_keep_trying == FALSE) {
514 SILC_LOG_ERROR(("Could not connect to router, giving up"));
518 /* Wait one before retrying */
519 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
520 context, sconn->retry_timeout,
521 server->params->retry_interval_min_usec,
522 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
525 /* Generic routine to use connect to a router. */
527 SILC_TASK_CALLBACK(silc_server_connect_router)
529 SilcServerConnection sconn = (SilcServerConnection)context;
530 SilcServer server = sconn->server;
531 SilcSocketConnection newsocket;
532 SilcProtocol protocol;
533 SilcServerKEInternalContext *proto_ctx;
536 /* Connect to remote host */
537 sock = silc_net_create_connection(sconn->remote_port,
540 SILC_LOG_ERROR(("Could not connect to router"));
541 silc_task_register(server->timeout_queue, fd,
542 silc_server_connect_to_router_retry,
543 context, 0, 1, SILC_TASK_TIMEOUT,
544 SILC_TASK_PRI_NORMAL);
548 /* Set socket options */
549 silc_net_set_socket_nonblock(sock);
550 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
552 /* Create socket connection for the connection. Even though we
553 know that we are connecting to a router we will mark the socket
554 to be unknown connection until we have executed authentication
556 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
557 server->sockets[sock] = newsocket;
558 newsocket->hostname = strdup(sconn->remote_host);
559 newsocket->ip = strdup(sconn->remote_host);
560 newsocket->port = sconn->remote_port;
561 sconn->sock = newsocket;
563 /* Allocate internal protocol context. This is sent as context
565 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
566 proto_ctx->server = (void *)server;
567 proto_ctx->context = (void *)sconn;
568 proto_ctx->sock = newsocket;
569 proto_ctx->rng = server->rng;
570 proto_ctx->responder = FALSE;
572 /* Perform key exchange protocol. silc_server_connect_to_router_second
573 will be called after the protocol is finished. */
574 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
575 &protocol, proto_ctx,
576 silc_server_connect_to_router_second);
577 newsocket->protocol = protocol;
579 /* Register a timeout task that will be executed if the protocol
580 is not executed within set limit. */
581 proto_ctx->timeout_task =
582 silc_task_register(server->timeout_queue, sock,
583 silc_server_timeout_remote,
584 server, server->params->protocol_timeout,
585 server->params->protocol_timeout_usec,
589 /* Register the connection for network input and output. This sets
590 that scheduler will listen for incoming packets for this connection
591 and sets that outgoing packets may be sent to this connection as
592 well. However, this doesn't set the scheduler for outgoing traffic,
593 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
594 later when outgoing data is available. */
595 context = (void *)server;
596 SILC_REGISTER_CONNECTION_FOR_IO(sock);
598 /* Run the protocol */
599 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
602 /* This function connects to our primary router or if we are a router this
603 establishes all our primary routes. This is called at the start of the
604 server to do authentication and key exchange with our router - called
607 SILC_TASK_CALLBACK(silc_server_connect_to_router)
609 SilcServer server = (SilcServer)context;
610 SilcServerConnection sconn;
612 SILC_LOG_DEBUG(("Connecting to router(s)"));
614 /* If we are normal SILC server we need to connect to our cell's
616 if (server->server_type == SILC_SERVER) {
617 SILC_LOG_DEBUG(("We are normal server"));
619 /* Create connection to the router, if configured. */
620 if (server->config->routers) {
622 /* Allocate connection object for hold connection specific stuff. */
623 sconn = silc_calloc(1, sizeof(*sconn));
624 sconn->server = server;
625 sconn->remote_host = server->config->routers->host;
626 sconn->remote_port = server->config->routers->port;
628 silc_task_register(server->timeout_queue, fd,
629 silc_server_connect_router,
630 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
631 SILC_TASK_PRI_NORMAL);
636 /* If we are a SILC router we need to establish all of our primary
638 if (server->server_type == SILC_ROUTER) {
639 SilcServerConfigSectionServerConnection *ptr;
641 SILC_LOG_DEBUG(("We are router"));
643 /* Create the connections to all our routes */
644 ptr = server->config->routers;
647 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
648 ptr->initiator ? "Initiator" : "Responder",
649 ptr->host, ptr->port));
651 if (ptr->initiator) {
652 /* Allocate connection object for hold connection specific stuff. */
653 sconn = silc_calloc(1, sizeof(*sconn));
654 sconn->server = server;
655 sconn->remote_host = ptr->host;
656 sconn->remote_port = ptr->port;
658 silc_task_register(server->timeout_queue, fd,
659 silc_server_connect_router,
660 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
661 SILC_TASK_PRI_NORMAL);
671 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
673 /* There wasn't a configured router, we will continue but we don't
674 have a connection to outside world. We will be standalone server. */
675 server->standalone = TRUE;
678 /* Second part of connecting to router(s). Key exchange protocol has been
679 executed and now we will execute authentication protocol. */
681 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
683 SilcProtocol protocol = (SilcProtocol)context;
684 SilcServerKEInternalContext *ctx =
685 (SilcServerKEInternalContext *)protocol->context;
686 SilcServer server = (SilcServer)ctx->server;
687 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
688 SilcSocketConnection sock = NULL;
689 SilcServerConnAuthInternalContext *proto_ctx;
691 SILC_LOG_DEBUG(("Start"));
693 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
694 /* Error occured during protocol */
695 silc_protocol_free(protocol);
697 silc_packet_context_free(ctx->packet);
699 silc_ske_free(ctx->ske);
701 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_AUTH_PASSWORD;
722 if (server->config->routers) {
723 SilcServerConfigSectionServerConnection *conn = NULL;
725 /* Check if we find a match from user configured connections */
726 conn = silc_server_config_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"));
1430 if (packet->flags & SILC_PACKET_FLAG_LIST)
1434 case SILC_PACKET_SUCCESS:
1436 * Success received for something. For now we can have only
1437 * one protocol for connection executing at once hence this
1438 * success message is for whatever protocol is executing currently.
1440 SILC_LOG_DEBUG(("Success packet"));
1441 if (packet->flags & SILC_PACKET_FLAG_LIST)
1443 if (sock->protocol) {
1444 sock->protocol->execute(server->timeout_queue, 0,
1445 sock->protocol, sock->sock, 0, 0);
1449 case SILC_PACKET_FAILURE:
1451 * Failure received for something. For now we can have only
1452 * one protocol for connection executing at once hence this
1453 * failure message is for whatever protocol is executing currently.
1455 SILC_LOG_DEBUG(("Failure packet"));
1456 if (packet->flags & SILC_PACKET_FLAG_LIST)
1458 if (sock->protocol) {
1459 /* XXX Audit the failure type */
1460 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1461 sock->protocol->execute(server->timeout_queue, 0,
1462 sock->protocol, sock->sock, 0, 0);
1466 case SILC_PACKET_REJECT:
1467 SILC_LOG_DEBUG(("Reject packet"));
1468 if (packet->flags & SILC_PACKET_FLAG_LIST)
1473 case SILC_PACKET_NOTIFY:
1475 * Received notify packet. Server can receive notify packets from
1476 * router. Server then relays the notify messages to clients if needed.
1478 SILC_LOG_DEBUG(("Notify packet"));
1479 if (packet->flags & SILC_PACKET_FLAG_LIST)
1480 silc_server_notify_list(server, sock, packet);
1482 silc_server_notify(server, sock, packet);
1488 case SILC_PACKET_CHANNEL_MESSAGE:
1490 * Received channel message. Channel messages are special packets
1491 * (although probably most common ones) thus they are handled
1494 SILC_LOG_DEBUG(("Channel Message packet"));
1495 if (packet->flags & SILC_PACKET_FLAG_LIST)
1497 silc_server_channel_message(server, sock, packet);
1500 case SILC_PACKET_CHANNEL_KEY:
1502 * Received key for channel. As channels are created by the router
1503 * the keys are as well. We will distribute the key to all of our
1504 * locally connected clients on the particular channel. Router
1505 * never receives this channel and thus is ignored.
1507 SILC_LOG_DEBUG(("Channel Key packet"));
1508 if (packet->flags & SILC_PACKET_FLAG_LIST)
1510 silc_server_channel_key(server, sock, packet);
1516 case SILC_PACKET_COMMAND:
1518 * Recived command. Processes the command request and allocates the
1519 * command context and calls the command.
1521 SILC_LOG_DEBUG(("Command packet"));
1522 if (packet->flags & SILC_PACKET_FLAG_LIST)
1524 silc_server_command_process(server, sock, packet);
1527 case SILC_PACKET_COMMAND_REPLY:
1529 * Received command reply packet. Received command reply to command. It
1530 * may be reply to command sent by us or reply to command sent by client
1531 * that we've routed further.
1533 SILC_LOG_DEBUG(("Command Reply packet"));
1534 if (packet->flags & SILC_PACKET_FLAG_LIST)
1536 silc_server_command_reply(server, sock, packet);
1540 * Private Message packets
1542 case SILC_PACKET_PRIVATE_MESSAGE:
1544 * Received private message packet. The packet is coming from either
1547 SILC_LOG_DEBUG(("Private Message packet"));
1548 if (packet->flags & SILC_PACKET_FLAG_LIST)
1550 silc_server_private_message(server, sock, packet);
1553 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1555 * Private message key packet.
1557 if (packet->flags & SILC_PACKET_FLAG_LIST)
1562 * Key Exchange protocol packets
1564 case SILC_PACKET_KEY_EXCHANGE:
1565 SILC_LOG_DEBUG(("KE packet"));
1566 if (packet->flags & SILC_PACKET_FLAG_LIST)
1569 if (sock->protocol && sock->protocol->protocol->type
1570 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1572 SilcServerKEInternalContext *proto_ctx =
1573 (SilcServerKEInternalContext *)sock->protocol->context;
1575 proto_ctx->packet = silc_packet_context_dup(packet);
1577 /* Let the protocol handle the packet */
1578 sock->protocol->execute(server->timeout_queue, 0,
1579 sock->protocol, sock->sock, 0, 100000);
1581 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1582 "protocol active, packet dropped."));
1584 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1588 case SILC_PACKET_KEY_EXCHANGE_1:
1589 SILC_LOG_DEBUG(("KE 1 packet"));
1590 if (packet->flags & SILC_PACKET_FLAG_LIST)
1593 if (sock->protocol && sock->protocol->protocol->type
1594 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1596 SilcServerKEInternalContext *proto_ctx =
1597 (SilcServerKEInternalContext *)sock->protocol->context;
1599 if (proto_ctx->packet)
1600 silc_packet_context_free(proto_ctx->packet);
1602 proto_ctx->packet = silc_packet_context_dup(packet);
1603 proto_ctx->dest_id_type = packet->src_id_type;
1604 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1605 packet->src_id_type);
1606 if (!proto_ctx->dest_id)
1609 /* Let the protocol handle the packet */
1610 sock->protocol->execute(server->timeout_queue, 0,
1611 sock->protocol, sock->sock,
1614 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1615 "protocol active, packet dropped."));
1619 case SILC_PACKET_KEY_EXCHANGE_2:
1620 SILC_LOG_DEBUG(("KE 2 packet"));
1621 if (packet->flags & SILC_PACKET_FLAG_LIST)
1624 if (sock->protocol && sock->protocol->protocol->type
1625 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1627 SilcServerKEInternalContext *proto_ctx =
1628 (SilcServerKEInternalContext *)sock->protocol->context;
1630 if (proto_ctx->packet)
1631 silc_packet_context_free(proto_ctx->packet);
1633 proto_ctx->packet = silc_packet_context_dup(packet);
1634 proto_ctx->dest_id_type = packet->src_id_type;
1635 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1636 packet->src_id_type);
1637 if (!proto_ctx->dest_id)
1640 /* Let the protocol handle the packet */
1641 sock->protocol->execute(server->timeout_queue, 0,
1642 sock->protocol, sock->sock,
1645 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1646 "protocol active, packet dropped."));
1650 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1652 * Connection authentication request packet. When we receive this packet
1653 * we will send to the other end information about our mandatory
1654 * authentication method for the connection. This packet maybe received
1657 SILC_LOG_DEBUG(("Connection authentication request packet"));
1658 if (packet->flags & SILC_PACKET_FLAG_LIST)
1663 * Connection Authentication protocol packets
1665 case SILC_PACKET_CONNECTION_AUTH:
1666 /* Start of the authentication protocol. We receive here the
1667 authentication data and will verify it. */
1668 SILC_LOG_DEBUG(("Connection auth packet"));
1669 if (packet->flags & SILC_PACKET_FLAG_LIST)
1672 if (sock->protocol && sock->protocol->protocol->type
1673 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1675 SilcServerConnAuthInternalContext *proto_ctx =
1676 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1678 proto_ctx->packet = silc_packet_context_dup(packet);
1680 /* Let the protocol handle the packet */
1681 sock->protocol->execute(server->timeout_queue, 0,
1682 sock->protocol, sock->sock, 0, 0);
1684 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1685 "protocol active, packet dropped."));
1689 case SILC_PACKET_NEW_ID:
1691 * Received New ID packet. This includes some new ID that has been
1692 * created. It may be for client, server or channel. This is the way
1693 * to distribute information about new registered entities in the
1696 SILC_LOG_DEBUG(("New ID packet"));
1697 if (packet->flags & SILC_PACKET_FLAG_LIST)
1698 silc_server_new_id_list(server, sock, packet);
1700 silc_server_new_id(server, sock, packet);
1703 case SILC_PACKET_NEW_CLIENT:
1705 * Received new client packet. This includes client information that
1706 * we will use to create initial client ID. After creating new
1707 * ID we will send it to the client.
1709 SILC_LOG_DEBUG(("New Client packet"));
1710 if (packet->flags & SILC_PACKET_FLAG_LIST)
1712 silc_server_new_client(server, sock, packet);
1715 case SILC_PACKET_NEW_SERVER:
1717 * Received new server packet. This includes Server ID and some other
1718 * information that we may save. This is received after server has
1721 SILC_LOG_DEBUG(("New Server packet"));
1722 if (packet->flags & SILC_PACKET_FLAG_LIST)
1724 silc_server_new_server(server, sock, packet);
1727 case SILC_PACKET_NEW_CHANNEL:
1729 * Received new channel packet. Information about new channel in the
1730 * network are distributed using this packet.
1732 SILC_LOG_DEBUG(("New Channel packet"));
1733 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 silc_server_new_channel_list(server, sock, packet);
1736 silc_server_new_channel(server, sock, packet);
1739 case SILC_PACKET_HEARTBEAT:
1741 * Received heartbeat.
1743 SILC_LOG_DEBUG(("Heartbeat packet"));
1744 if (packet->flags & SILC_PACKET_FLAG_LIST)
1749 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1755 /* Closes connection to socket connection */
1757 void silc_server_close_connection(SilcServer server,
1758 SilcSocketConnection sock)
1760 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1762 /* We won't listen for this connection anymore */
1763 silc_schedule_unset_listen_fd(sock->sock);
1765 /* Unregister all tasks */
1766 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1767 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1769 /* Close the actual connection */
1770 silc_net_close_connection(sock->sock);
1771 server->sockets[sock->sock] = NULL;
1772 silc_socket_free(sock);
1775 /* Sends disconnect message to remote connection and disconnects the
1778 void silc_server_disconnect_remote(SilcServer server,
1779 SilcSocketConnection sock,
1780 const char *fmt, ...)
1783 unsigned char buf[4096];
1788 memset(buf, 0, sizeof(buf));
1790 vsprintf(buf, fmt, ap);
1793 SILC_LOG_DEBUG(("Disconnecting remote host"));
1795 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1797 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1798 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1799 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1802 /* Notify remote end that the conversation is over. The notify message
1803 is tried to be sent immediately. */
1804 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1805 buf, strlen(buf), TRUE);
1807 /* Mark the connection to be disconnected */
1808 SILC_SET_DISCONNECTED(sock);
1809 silc_server_close_connection(server, sock);
1812 /* Frees client data and notifies about client's signoff. */
1814 void silc_server_free_client_data(SilcServer server,
1815 SilcSocketConnection sock,
1816 SilcClientEntry user_data, char *signoff)
1818 /* Send REMOVE_ID packet to routers. */
1819 if (!server->standalone && server->router)
1820 silc_server_send_notify_signoff(server, server->router->connection,
1821 server->server_type == SILC_SERVER ?
1822 FALSE : TRUE, user_data->id,
1823 SILC_ID_CLIENT_LEN, signoff);
1825 /* Remove client from all channels */
1826 silc_server_remove_from_channels(server, sock, user_data, signoff);
1828 /* XXX must take some info to history before freeing */
1830 /* Free the client entry and everything in it */
1831 silc_idlist_del_data(user_data);
1832 silc_idlist_del_client(server->local_list, user_data);
1833 server->stat.my_clients--;
1834 server->stat.clients--;
1835 if (server->server_type == SILC_ROUTER)
1836 server->stat.cell_clients--;
1839 /* Frees user_data pointer from socket connection object. This also sends
1840 appropriate notify packets to the network to inform about leaving
1843 void silc_server_free_sock_user_data(SilcServer server,
1844 SilcSocketConnection sock)
1846 SILC_LOG_DEBUG(("Start"));
1848 switch(sock->type) {
1849 case SILC_SOCKET_TYPE_CLIENT:
1851 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
1852 silc_server_free_client_data(server, sock, user_data, NULL);
1855 case SILC_SOCKET_TYPE_SERVER:
1856 case SILC_SOCKET_TYPE_ROUTER:
1858 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
1860 /* Send REMOVE_ID packet to routers. */
1861 if (!server->standalone && server->router)
1862 silc_server_send_notify_server_signoff(server,
1863 server->router->connection,
1864 server->server_type ==
1866 FALSE : TRUE, user_data->id,
1867 SILC_ID_SERVER_LEN);
1869 /* Then also free all client entries that this server owns as
1870 they will become invalid now as well. */
1871 silc_server_remove_clients_by_server(server, user_data);
1873 /* If this was our primary router connection then we're lost to
1874 the outside world. */
1875 if (server->server_type == SILC_SERVER && server->router == user_data) {
1876 server->id_entry->router = NULL;
1877 server->router = NULL;
1878 server->standalone = TRUE;
1881 /* Free the server entry */
1882 silc_idlist_del_data(user_data);
1883 silc_idlist_del_server(server->local_list, user_data);
1884 server->stat.my_servers--;
1885 server->stat.servers--;
1886 if (server->server_type == SILC_ROUTER)
1887 server->stat.cell_servers--;
1892 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
1894 silc_idlist_del_data(user_data);
1895 silc_free(user_data);
1900 sock->user_data = NULL;
1903 /* This function is used to remove all client entries by the server `entry'.
1904 This is called when the connection is lost to the server. In this case
1905 we must invalidate all the client entries owned by the server `entry'. */
1907 int silc_server_remove_clients_by_server(SilcServer server,
1908 SilcServerEntry entry)
1910 SilcIDCacheList list = NULL;
1911 SilcIDCacheEntry id_cache = NULL;
1912 SilcClientEntry client = NULL;
1914 SILC_LOG_DEBUG(("Start"));
1916 if (silc_idcache_find_by_id(server->local_list->clients,
1917 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1919 if (silc_idcache_list_first(list, &id_cache)) {
1921 client = (SilcClientEntry)id_cache->context;
1923 if (client->router != entry) {
1924 if (!silc_idcache_list_next(list, &id_cache))
1930 /* Remove the client entry */
1931 silc_server_remove_from_channels(server, NULL, client, NULL);
1932 silc_idlist_del_client(server->local_list, client);
1934 if (!silc_idcache_list_next(list, &id_cache))
1938 silc_idcache_list_free(list);
1941 if (silc_idcache_find_by_id(server->global_list->clients,
1942 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
1944 if (silc_idcache_list_first(list, &id_cache)) {
1946 client = (SilcClientEntry)id_cache->context;
1948 if (client->router != entry) {
1949 if (!silc_idcache_list_next(list, &id_cache))
1955 /* Remove the client entry */
1956 silc_server_remove_from_channels(server, NULL, client, NULL);
1957 silc_idlist_del_client(server->global_list, client);
1959 if (!silc_idcache_list_next(list, &id_cache))
1963 silc_idcache_list_free(list);
1969 /* Checks whether given channel has global users. If it does this returns
1970 TRUE and FALSE if there is only locally connected clients on the channel. */
1972 int silc_server_channel_has_global(SilcChannelEntry channel)
1974 SilcChannelClientEntry chl;
1976 silc_list_start(channel->user_list);
1977 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1978 if (chl->client->router)
1985 /* Checks whether given channel has locally connected users. If it does this
1986 returns TRUE and FALSE if there is not one locally connected client. */
1988 int silc_server_channel_has_local(SilcChannelEntry channel)
1990 SilcChannelClientEntry chl;
1992 silc_list_start(channel->user_list);
1993 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1994 if (!chl->client->router)
2001 /* Removes client from all channels it has joined. This is used when client
2002 connection is disconnected. If the client on a channel is last, the
2003 channel is removed as well. This sends the SIGNOFF notify types. */
2005 void silc_server_remove_from_channels(SilcServer server,
2006 SilcSocketConnection sock,
2007 SilcClientEntry client,
2008 char *signoff_message)
2010 SilcChannelEntry channel;
2011 SilcChannelClientEntry chl;
2014 SILC_LOG_DEBUG(("Start"));
2016 if (!client || !client->id)
2019 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2021 /* Remove the client from all channels. The client is removed from
2022 the channels' user list. */
2023 silc_list_start(client->channels);
2024 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2025 channel = chl->channel;
2027 /* Remove channel from client's channel list */
2028 silc_list_del(client->channels, chl);
2030 /* Remove channel if there is no users anymore */
2031 if (server->server_type == SILC_ROUTER &&
2032 silc_list_count(channel->user_list) < 2) {
2033 if (!silc_idlist_del_channel(server->local_list, channel))
2034 silc_idlist_del_channel(server->global_list, channel);
2035 server->stat.my_channels--;
2039 /* Remove client from channel's client list */
2040 silc_list_del(channel->user_list, chl);
2042 server->stat.my_chanclients--;
2044 /* If there is no global users on the channel anymore mark the channel
2045 as local channel. */
2046 if (server->server_type == SILC_SERVER &&
2047 !silc_server_channel_has_global(channel))
2048 channel->global_users = FALSE;
2050 /* If there is not at least one local user on the channel then we don't
2051 need the channel entry anymore, we can remove it safely. */
2052 if (server->server_type == SILC_SERVER &&
2053 !silc_server_channel_has_local(channel)) {
2054 /* Notify about leaving client if this channel has global users. */
2055 if (channel->global_users)
2056 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2057 SILC_NOTIFY_TYPE_SIGNOFF,
2058 signoff_message ? 2 : 1,
2059 clidp->data, clidp->len,
2060 signoff_message, signoff_message ?
2061 strlen(signoff_message) : 0);
2063 if (!silc_idlist_del_channel(server->local_list, channel))
2064 silc_idlist_del_channel(server->global_list, channel);
2065 server->stat.my_channels--;
2069 /* Send notify to channel about client leaving SILC and thus
2070 the entire channel. */
2071 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2072 SILC_NOTIFY_TYPE_SIGNOFF,
2073 signoff_message ? 2 : 1,
2074 clidp->data, clidp->len,
2075 signoff_message, signoff_message ?
2076 strlen(signoff_message) : 0);
2079 silc_buffer_free(clidp);
2082 /* Removes client from one channel. This is used for example when client
2083 calls LEAVE command to remove itself from the channel. Returns TRUE
2084 if channel still exists and FALSE if the channel is removed when
2085 last client leaves the channel. If `notify' is FALSE notify messages
2088 int silc_server_remove_from_one_channel(SilcServer server,
2089 SilcSocketConnection sock,
2090 SilcChannelEntry channel,
2091 SilcClientEntry client,
2094 SilcChannelEntry ch;
2095 SilcChannelClientEntry chl;
2098 SILC_LOG_DEBUG(("Start"));
2100 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2102 /* Remove the client from the channel. The client is removed from
2103 the channel's user list. */
2104 silc_list_start(client->channels);
2105 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2106 if (chl->channel != channel)
2111 /* Remove channel from client's channel list */
2112 silc_list_del(client->channels, chl);
2114 /* Remove channel if there is no users anymore */
2115 if (server->server_type == SILC_ROUTER &&
2116 silc_list_count(channel->user_list) < 2) {
2117 if (!silc_idlist_del_channel(server->local_list, channel))
2118 silc_idlist_del_channel(server->global_list, channel);
2119 silc_buffer_free(clidp);
2120 server->stat.my_channels--;
2124 /* Remove client from channel's client list */
2125 silc_list_del(channel->user_list, chl);
2127 server->stat.my_chanclients--;
2129 /* If there is no global users on the channel anymore mark the channel
2130 as local channel. */
2131 if (server->server_type == SILC_SERVER &&
2132 !silc_server_channel_has_global(channel))
2133 channel->global_users = FALSE;
2135 /* If there is not at least one local user on the channel then we don't
2136 need the channel entry anymore, we can remove it safely. */
2137 if (server->server_type == SILC_SERVER &&
2138 !silc_server_channel_has_local(channel)) {
2139 /* Notify about leaving client if this channel has global users. */
2140 if (notify && channel->global_users)
2141 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2142 SILC_NOTIFY_TYPE_LEAVE, 1,
2143 clidp->data, clidp->len);
2145 if (!silc_idlist_del_channel(server->local_list, channel))
2146 silc_idlist_del_channel(server->global_list, channel);
2147 silc_buffer_free(clidp);
2148 server->stat.my_channels--;
2152 /* Send notify to channel about client leaving the channel */
2154 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2155 SILC_NOTIFY_TYPE_LEAVE, 1,
2156 clidp->data, clidp->len);
2160 silc_buffer_free(clidp);
2164 /* Returns TRUE if the given client is on the channel. FALSE if not.
2165 This works because we assure that the user list on the channel is
2166 always in up to date thus we can only check the channel list from
2167 `client' which is faster than checking the user list from `channel'. */
2169 int silc_server_client_on_channel(SilcClientEntry client,
2170 SilcChannelEntry channel)
2172 SilcChannelClientEntry chl;
2174 if (!client || !channel)
2177 silc_list_start(client->channels);
2178 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2179 if (chl->channel == channel)
2185 /* Timeout callback. This is called if connection is idle or for some
2186 other reason is not responding within some period of time. This
2187 disconnects the remote end. */
2189 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2191 SilcServer server = (SilcServer)context;
2192 SilcSocketConnection sock = server->sockets[fd];
2197 if (sock->user_data)
2198 silc_server_free_sock_user_data(server, sock);
2200 silc_server_disconnect_remote(server, sock,
2201 "Server closed connection: "
2202 "Connection timeout");
2205 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2206 function may be used only by router. In real SILC network all channels
2207 are created by routers thus this function is never used by normal
2210 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2211 SilcServerID *router_id,
2216 SilcChannelID *channel_id;
2217 SilcChannelEntry entry;
2220 SILC_LOG_DEBUG(("Creating new channel"));
2225 /* Allocate cipher */
2226 silc_cipher_alloc(cipher, &key);
2228 channel_name = strdup(channel_name);
2230 /* Create the channel */
2231 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2232 entry = silc_idlist_add_channel(server->local_list, channel_name,
2233 SILC_CHANNEL_MODE_NONE, channel_id,
2236 silc_free(channel_name);
2240 /* Now create the actual key material */
2241 silc_server_create_channel_key(server, entry, 16);
2243 /* Notify other routers about the new channel. We send the packet
2244 to our primary route. */
2245 if (broadcast && server->standalone == FALSE) {
2246 silc_server_send_new_channel(server, server->router->connection, TRUE,
2247 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2250 server->stat.my_channels++;
2255 /* Same as above but creates the channel with Channel ID `channel_id. */
2258 silc_server_create_new_channel_with_id(SilcServer server,
2261 SilcChannelID *channel_id,
2264 SilcChannelEntry entry;
2267 SILC_LOG_DEBUG(("Creating new channel"));
2272 /* Allocate cipher */
2273 silc_cipher_alloc(cipher, &key);
2275 channel_name = strdup(channel_name);
2277 /* Create the channel */
2278 entry = silc_idlist_add_channel(server->local_list, channel_name,
2279 SILC_CHANNEL_MODE_NONE, channel_id,
2282 silc_free(channel_name);
2286 /* Now create the actual key material */
2287 silc_server_create_channel_key(server, entry, 16);
2289 /* Notify other routers about the new channel. We send the packet
2290 to our primary route. */
2291 if (broadcast && server->standalone == FALSE) {
2292 silc_server_send_new_channel(server, server->router->connection, TRUE,
2293 channel_name, entry->id, SILC_ID_CHANNEL_LEN);
2296 server->stat.my_channels++;
2301 /* Generates new channel key. This is used to create the initial channel key
2302 but also to re-generate new key for channel. If `key_len' is provided
2303 it is the bytes of the key length. */
2305 void silc_server_create_channel_key(SilcServer server,
2306 SilcChannelEntry channel,
2307 unsigned int key_len)
2310 unsigned char channel_key[32];
2313 if (!channel->channel_key)
2314 silc_cipher_alloc("twofish", &channel->channel_key);
2318 else if (channel->key_len)
2319 len = channel->key_len / 8;
2321 len = sizeof(channel_key);
2323 /* Create channel key */
2324 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2327 channel->channel_key->cipher->set_key(channel->channel_key->context,
2330 /* Remove old key if exists */
2332 memset(channel->key, 0, channel->key_len / 8);
2333 silc_free(channel->key);
2337 channel->key_len = len * 8;
2338 channel->key = silc_calloc(len, sizeof(*channel->key));
2339 memcpy(channel->key, channel_key, len);
2340 memset(channel_key, 0, sizeof(channel_key));
2343 /* Saves the channel key found in the encoded `key_payload' buffer. This
2344 function is used when we receive Channel Key Payload and also when we're
2345 processing JOIN command reply. Returns entry to the channel. */
2347 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2348 SilcBuffer key_payload,
2349 SilcChannelEntry channel)
2351 SilcChannelKeyPayload payload = NULL;
2352 SilcChannelID *id = NULL;
2354 unsigned int tmp_len;
2357 /* Decode channel key payload */
2358 payload = silc_channel_key_payload_parse(key_payload);
2360 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2365 /* Get the channel entry */
2368 /* Get channel ID */
2369 tmp = silc_channel_key_get_id(payload, &tmp_len);
2370 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2376 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2378 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2380 SILC_LOG_ERROR(("Received key for non-existent channel"));
2386 tmp = silc_channel_key_get_key(payload, &tmp_len);
2392 cipher = silc_channel_key_get_cipher(payload, NULL);;
2398 /* Remove old key if exists */
2400 memset(channel->key, 0, channel->key_len / 8);
2401 silc_free(channel->key);
2402 silc_cipher_free(channel->channel_key);
2405 /* Create new cipher */
2406 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2412 channel->key_len = tmp_len * 8;
2413 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2414 memcpy(channel->key, tmp, tmp_len);
2415 channel->channel_key->cipher->set_key(channel->channel_key->context,
2422 silc_channel_key_payload_free(payload);
2427 /* Heartbeat callback. This function is set as argument for the
2428 silc_socket_set_heartbeat function. The library will call this function
2429 at the set time interval. */
2431 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2434 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2436 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2439 /* Send the heartbeat */
2440 silc_server_send_heartbeat(hb->server, sock);
2443 /* Returns assembled of all servers in the given ID list. The packet's
2444 form is dictated by the New ID payload. */
2446 static void silc_server_announce_get_servers(SilcServer server,
2448 SilcBuffer *servers)
2450 SilcIDCacheList list;
2451 SilcIDCacheEntry id_cache;
2452 SilcServerEntry entry;
2455 /* Go through all clients in the list */
2456 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2457 SILC_ID_SERVER, &list)) {
2458 if (silc_idcache_list_first(list, &id_cache)) {
2460 entry = (SilcServerEntry)id_cache->context;
2462 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2464 *servers = silc_buffer_realloc(*servers,
2466 (*servers)->truelen + idp->len :
2468 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2469 silc_buffer_put(*servers, idp->data, idp->len);
2470 silc_buffer_pull(*servers, idp->len);
2471 silc_buffer_free(idp);
2473 if (!silc_idcache_list_next(list, &id_cache))
2478 silc_idcache_list_free(list);
2482 /* This function is used by router to announce existing servers to our
2483 primary router when we've connected to it. */
2485 void silc_server_announce_servers(SilcServer server)
2487 SilcBuffer servers = NULL;
2489 SILC_LOG_DEBUG(("Announcing servers"));
2491 /* Get servers in local list */
2492 silc_server_announce_get_servers(server, server->local_list, &servers);
2494 /* Get servers in global list */
2495 silc_server_announce_get_servers(server, server->global_list, &servers);
2498 silc_buffer_push(servers, servers->data - servers->head);
2499 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2501 /* Send the packet */
2502 silc_server_packet_send(server, server->router->connection,
2503 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2504 servers->data, servers->len, TRUE);
2506 silc_buffer_free(servers);
2510 /* Returns assembled packet of all clients in the given ID list. The
2511 packet's form is dictated by the New ID Payload. */
2513 static void silc_server_announce_get_clients(SilcServer server,
2515 SilcBuffer *clients)
2517 SilcIDCacheList list;
2518 SilcIDCacheEntry id_cache;
2519 SilcClientEntry client;
2522 /* Go through all clients in the list */
2523 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2524 SILC_ID_CLIENT, &list)) {
2525 if (silc_idcache_list_first(list, &id_cache)) {
2527 client = (SilcClientEntry)id_cache->context;
2529 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2531 *clients = silc_buffer_realloc(*clients,
2533 (*clients)->truelen + idp->len :
2535 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2536 silc_buffer_put(*clients, idp->data, idp->len);
2537 silc_buffer_pull(*clients, idp->len);
2538 silc_buffer_free(idp);
2540 if (!silc_idcache_list_next(list, &id_cache))
2545 silc_idcache_list_free(list);
2549 /* This function is used to announce our existing clients to our router
2550 when we've connected to it. */
2552 void silc_server_announce_clients(SilcServer server)
2554 SilcBuffer clients = NULL;
2556 SILC_LOG_DEBUG(("Announcing clients"));
2558 /* Get clients in local list */
2559 silc_server_announce_get_clients(server, server->local_list,
2562 /* As router we announce our global list as well */
2563 if (server->server_type == SILC_ROUTER)
2564 silc_server_announce_get_clients(server, server->global_list,
2568 silc_buffer_push(clients, clients->data - clients->head);
2569 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2571 /* Send the packet */
2572 silc_server_packet_send(server, server->router->connection,
2573 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2574 clients->data, clients->len, TRUE);
2576 silc_buffer_free(clients);
2581 silc_server_announce_encode_join(unsigned int argc, ...)
2586 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
2589 /* Returns assembled packets for all channels and users on those channels
2590 from the given ID List. The packets are in the form dictated by the
2591 New Channel and New Channel User payloads. */
2593 static void silc_server_announce_get_channels(SilcServer server,
2595 SilcBuffer *channels,
2596 SilcBuffer *channel_users)
2598 SilcIDCacheList list;
2599 SilcIDCacheEntry id_cache;
2600 SilcChannelEntry channel;
2601 SilcChannelClientEntry chl;
2604 unsigned short name_len;
2607 /* Go through all channels in the list */
2608 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2609 SILC_ID_CHANNEL, &list)) {
2610 if (silc_idcache_list_first(list, &id_cache)) {
2612 channel = (SilcChannelEntry)id_cache->context;
2614 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2615 name_len = strlen(channel->channel_name);
2617 len = 4 + name_len + SILC_ID_CHANNEL_LEN;
2619 silc_buffer_realloc(*channels,
2620 (*channels ? (*channels)->truelen + len : len));
2621 silc_buffer_pull_tail(*channels,
2622 ((*channels)->end - (*channels)->data));
2623 silc_buffer_format(*channels,
2624 SILC_STR_UI_SHORT(name_len),
2625 SILC_STR_UI_XNSTRING(channel->channel_name,
2627 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2628 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2630 silc_buffer_pull(*channels, len);
2632 /* Now find all users on the channel */
2633 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2634 silc_list_start(channel->user_list);
2635 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2639 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
2641 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
2642 chidp->data, chidp->len);
2645 silc_buffer_realloc(*channel_users,
2647 (*channel_users)->truelen + len : len));
2648 silc_buffer_pull_tail(*channel_users,
2649 ((*channel_users)->end -
2650 (*channel_users)->data));
2652 silc_buffer_put(*channel_users, tmp->data, tmp->len);
2653 silc_buffer_pull(*channel_users, len);
2654 silc_buffer_free(clidp);
2655 silc_buffer_free(tmp);
2657 silc_buffer_free(chidp);
2661 if (!silc_idcache_list_next(list, &id_cache))
2666 silc_idcache_list_free(list);
2670 /* This function is used to announce our existing channels to our router
2671 when we've connected to it. This also announces the users on the
2672 channels to the router. */
2674 void silc_server_announce_channels(SilcServer server)
2676 SilcBuffer channels = NULL, channel_users = NULL;
2678 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2680 /* Get channels and channel users in local list */
2681 silc_server_announce_get_channels(server, server->local_list,
2682 &channels, &channel_users);
2684 /* Get channels and channel users in global list */
2685 silc_server_announce_get_channels(server, server->global_list,
2686 &channels, &channel_users);
2689 silc_buffer_push(channels, channels->data - channels->head);
2690 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2692 /* Send the packet */
2693 silc_server_packet_send(server, server->router->connection,
2694 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
2695 channels->data, channels->len,
2698 silc_buffer_free(channels);
2701 if (channel_users) {
2702 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2703 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2704 channel_users->len);
2706 /* Send the packet */
2707 silc_server_packet_send(server, server->router->connection,
2708 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2709 channel_users->data, channel_users->len,
2712 silc_buffer_free(channel_users);