5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 silc_server_config_register_ciphers(server->config);
149 silc_server_config_register_pkcs(server->config);
150 silc_server_config_register_hashfuncs(server->config);
151 silc_server_config_register_hmacs(server->config);
153 /* Initialize random number generator for the server. */
154 server->rng = silc_rng_alloc();
155 silc_rng_init(server->rng);
156 silc_rng_global_init(server->rng);
158 /* Initialize hash functions for server to use */
159 silc_hash_alloc("md5", &server->md5hash);
160 silc_hash_alloc("sha1", &server->sha1hash);
162 /* Initialize none cipher */
163 silc_cipher_alloc("none", &server->none_cipher);
165 /* Create a listening server. Note that our server can listen on
166 multiple ports. All listeners are created here and now. */
167 /* XXX Still check this whether to use server_info or listen_port. */
169 while(server->config->listen_port) {
172 tmp = silc_net_create_server(server->config->listen_port->port,
173 server->config->listen_port->host);
177 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
178 sock[sock_count] = tmp;
179 server->config->listen_port = server->config->listen_port->next;
183 /* Initialize ID caches */
184 server->local_list->clients =
185 silc_idcache_alloc(0, silc_idlist_client_destructor);
186 server->local_list->servers = silc_idcache_alloc(0, NULL);
187 server->local_list->channels = silc_idcache_alloc(0, NULL);
189 /* These are allocated for normal server as well as these hold some
190 global information that the server has fetched from its router. For
191 router these are used as they are supposed to be used on router. */
192 server->global_list->clients =
193 silc_idcache_alloc(0, silc_idlist_client_destructor);
194 server->global_list->servers = silc_idcache_alloc(0, NULL);
195 server->global_list->channels = silc_idcache_alloc(0, NULL);
197 /* Allocate the entire socket list that is used in server. Eventually
198 all connections will have entry in this table (it is a table of
199 pointers to the actual object that is allocated individually
201 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
202 sizeof(*server->sockets));
204 for (i = 0; i < sock_count; i++) {
205 SilcSocketConnection newsocket = NULL;
207 /* Set socket to non-blocking mode */
208 silc_net_set_socket_nonblock(sock[i]);
209 server->sock = sock[i];
211 /* Create a Server ID for the server. */
212 silc_id_create_server_id(sock[i], server->rng, &id);
218 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
219 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
220 server->id_type = SILC_ID_SERVER;
221 server->server_name = server->config->server_info->server_name;
223 /* Add ourselves to the server list. We don't have a router yet
224 beacuse we haven't established a route yet. It will be done later.
225 For now, NULL is sent as router. This allocates new entry to
228 silc_idlist_add_server(server->local_list,
229 server->config->server_info->server_name,
230 server->server_type, server->id, NULL, NULL);
232 SILC_LOG_ERROR(("Could not add ourselves to cache"));
236 /* Add ourselves also to the socket table. The entry allocated above
237 is sent as argument for fast referencing in the future. */
238 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
241 server->sockets[sock[i]] = newsocket;
243 /* Put the allocated socket pointer also to the entry allocated above
244 for fast back-referencing to the socket list. */
245 id_entry->connection = (void *)server->sockets[sock[i]];
246 server->id_entry = id_entry;
249 /* Register the task queues. In SILC we have by default three task queues.
250 One task queue for non-timeout tasks which perform different kind of
251 I/O on file descriptors, timeout task queue for timeout tasks, and,
252 generic non-timeout task queue whose tasks apply to all connections. */
253 silc_task_queue_alloc(&server->io_queue, TRUE);
254 if (!server->io_queue) {
257 silc_task_queue_alloc(&server->timeout_queue, TRUE);
258 if (!server->timeout_queue) {
261 silc_task_queue_alloc(&server->generic_queue, TRUE);
262 if (!server->generic_queue) {
266 /* Register protocols */
267 silc_server_protocols_register();
269 /* Initialize the scheduler */
270 silc_schedule_init(&server->io_queue, &server->timeout_queue,
271 &server->generic_queue,
272 SILC_SERVER_MAX_CONNECTIONS);
274 /* Add the first task to the queue. This is task that is executed by
275 timeout. It expires as soon as the caller calls silc_server_run. This
276 task performs authentication protocol and key exchange with our
278 silc_task_register(server->timeout_queue, sock[0],
279 silc_server_connect_to_router,
280 (void *)server, 0, 1,
282 SILC_TASK_PRI_NORMAL);
284 /* Add listener task to the queue. This task receives new connections to the
285 server. This task remains on the queue until the end of the program. */
286 silc_task_register(server->io_queue, sock[0],
287 silc_server_accept_new_connection,
288 (void *)server, 0, 0,
290 SILC_TASK_PRI_NORMAL);
291 server->listenning = TRUE;
293 /* If server connections has been configured then we must be router as
294 normal server cannot have server connections, only router connections. */
295 if (server->config->servers)
296 server->server_type = SILC_ROUTER;
298 /* Register the ID Cache purge task. This periodically purges the ID cache
299 and removes the expired cache entries. */
301 /* Clients local list */
302 purge = silc_calloc(1, sizeof(*purge));
303 purge->cache = server->local_list->clients;
304 purge->timeout_queue = server->timeout_queue;
305 silc_task_register(purge->timeout_queue, 0,
307 (void *)purge, 600, 0,
308 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
310 /* Clients global list */
311 purge = silc_calloc(1, sizeof(*purge));
312 purge->cache = server->global_list->clients;
313 purge->timeout_queue = server->timeout_queue;
314 silc_task_register(purge->timeout_queue, 0,
316 (void *)purge, 300, 0,
317 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
319 SILC_LOG_DEBUG(("Server initialized"));
321 /* We are done here, return succesfully */
324 silc_task_queue_free(server->timeout_queue);
326 silc_task_queue_free(server->io_queue);
328 for (i = 0; i < sock_count; i++)
329 silc_net_close_server(sock[i]);
334 /* Fork server to background and set gid+uid to non-root.
335 Silcd will not run as root, so trying to set either user or group to
336 root will cause silcd to exit. */
338 void silc_server_daemonise(SilcServer server)
340 /* Are we executing silcd as root or a regular user? */
347 if (!server->config->identity || !server->config->identity->user ||
348 !server->config->identity->group) {
349 fprintf(stderr, "Error:"
350 "\tSILC server must not be run as root. For the security of your\n"
351 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
352 "\tuser account. Modify the [Identity] configuration section to run\n"
353 "\tthe server as non-root user.\n");
357 /* Get the values given for user and group in configuration file */
358 user=server->config->identity->user;
359 group=server->config->identity->group;
361 /* Check whether the user/group information is text */
362 if (atoi(user)!=0 || atoi(group)!=0) {
363 SILC_LOG_DEBUG(("Invalid user and/or group information"));
364 SILC_LOG_DEBUG(("User and/or group given as number"));
365 fprintf(stderr, "Invalid user and/or group information\n");
366 fprintf(stderr, "Please assign them as names, not numbers\n");
370 /* Catch the nasty incident of string "0" returning 0 from atoi */
371 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
372 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
373 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
381 fprintf(stderr, "No such user %s found\n", user);
386 fprintf(stderr, "No such group %s found\n", group);
390 /* Check whether user and/or group is set to root. If yes, exit
391 immediately. Otherwise, setgid and setuid server to user.group */
392 if (gr->gr_gid==0 || pw->pw_uid==0) {
393 fprintf(stderr, "Error:"
394 "\tSILC server must not be run as root. For the security of your\n"
395 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
396 "\tuser account. Modify the [Identity] configuration section to run\n"
397 "\tthe server as non-root user.\n");
400 /* Fork server to background, making it a daemon */
402 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
403 SILC_LOG_DEBUG(("Forking SILC server to background"));
408 SILC_LOG_DEBUG(("Changing to group %s", group));
409 if(setgid(gr->gr_gid)==0) {
410 SILC_LOG_DEBUG(("Setgid to %s", group));
412 SILC_LOG_DEBUG(("Setgid to %s failed", group));
413 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
417 SILC_LOG_DEBUG(("Changing to user nobody"));
418 if(setuid(pw->pw_uid)==0) {
419 SILC_LOG_DEBUG(("Setuid to %s", user));
421 SILC_LOG_DEBUG(("Setuid to %s failed", user));
422 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
428 /* Fork server to background, making it a daemon */
430 SILC_LOG_DEBUG(("Server started as user"));
431 SILC_LOG_DEBUG(("Forking SILC server to background"));
438 /* Stops the SILC server. This function is used to shutdown the server.
439 This is usually called after the scheduler has returned. After stopping
440 the server one should call silc_server_free. */
442 void silc_server_stop(SilcServer server)
444 SILC_LOG_DEBUG(("Stopping server"));
446 /* Stop the scheduler, although it might be already stopped. This
447 doesn't hurt anyone. This removes all the tasks and task queues,
449 silc_schedule_stop();
450 silc_schedule_uninit();
452 silc_server_protocols_unregister();
454 SILC_LOG_DEBUG(("Server stopped"));
457 /* The heart of the server. This runs the scheduler thus runs the server.
458 When this returns the server has been stopped and the program will
461 void silc_server_run(SilcServer server)
463 SILC_LOG_DEBUG(("Running server"));
465 /* Start the scheduler, the heart of the SILC server. When this returns
466 the program will be terminated. */
470 /* Timeout callback that will be called to retry connecting to remote
471 router. This is used by both normal and router server. This will wait
472 before retrying the connecting. The timeout is generated by exponential
473 backoff algorithm. */
475 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
477 SilcServerConnection sconn = (SilcServerConnection)context;
478 SilcServer server = sconn->server;
480 SILC_LOG_INFO(("Retrying connecting to a router"));
482 /* Calculate next timeout */
483 if (sconn->retry_count >= 1) {
484 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
485 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
486 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
488 sconn->retry_timeout = server->params->retry_interval_min;
490 sconn->retry_count++;
491 sconn->retry_timeout = sconn->retry_timeout +
492 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
494 /* If we've reached max retry count, give up. */
495 if (sconn->retry_count > server->params->retry_count &&
496 server->params->retry_keep_trying == FALSE) {
497 SILC_LOG_ERROR(("Could not connect to router, giving up"));
501 /* Wait one before retrying */
502 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
503 context, sconn->retry_timeout,
504 server->params->retry_interval_min_usec,
505 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
508 /* Generic routine to use connect to a router. */
510 SILC_TASK_CALLBACK(silc_server_connect_router)
512 SilcServerConnection sconn = (SilcServerConnection)context;
513 SilcServer server = sconn->server;
514 SilcSocketConnection newsocket;
515 SilcProtocol protocol;
516 SilcServerKEInternalContext *proto_ctx;
519 SILC_LOG_INFO(("Connecting to the router %s on port %d",
520 sconn->remote_host, sconn->remote_port));
522 /* Connect to remote host */
523 sock = silc_net_create_connection(sconn->remote_port,
526 SILC_LOG_ERROR(("Could not connect to router"));
527 silc_task_register(server->timeout_queue, fd,
528 silc_server_connect_to_router_retry,
529 context, 0, 1, SILC_TASK_TIMEOUT,
530 SILC_TASK_PRI_NORMAL);
534 /* Set socket options */
535 silc_net_set_socket_nonblock(sock);
536 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
538 /* Create socket connection for the connection. Even though we
539 know that we are connecting to a router we will mark the socket
540 to be unknown connection until we have executed authentication
542 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
543 server->sockets[sock] = newsocket;
544 newsocket->hostname = strdup(sconn->remote_host);
545 newsocket->ip = strdup(sconn->remote_host);
546 newsocket->port = sconn->remote_port;
547 sconn->sock = newsocket;
549 /* Allocate internal protocol context. This is sent as context
551 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
552 proto_ctx->server = (void *)server;
553 proto_ctx->context = (void *)sconn;
554 proto_ctx->sock = newsocket;
555 proto_ctx->rng = server->rng;
556 proto_ctx->responder = FALSE;
558 /* Perform key exchange protocol. silc_server_connect_to_router_second
559 will be called after the protocol is finished. */
560 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
561 &protocol, proto_ctx,
562 silc_server_connect_to_router_second);
563 newsocket->protocol = protocol;
565 /* Register a timeout task that will be executed if the protocol
566 is not executed within set limit. */
567 proto_ctx->timeout_task =
568 silc_task_register(server->timeout_queue, sock,
569 silc_server_timeout_remote,
570 server, server->params->protocol_timeout,
571 server->params->protocol_timeout_usec,
575 /* Register the connection for network input and output. This sets
576 that scheduler will listen for incoming packets for this connection
577 and sets that outgoing packets may be sent to this connection as
578 well. However, this doesn't set the scheduler for outgoing traffic,
579 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
580 later when outgoing data is available. */
581 context = (void *)server;
582 SILC_REGISTER_CONNECTION_FOR_IO(sock);
584 /* Run the protocol */
585 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
588 /* This function connects to our primary router or if we are a router this
589 establishes all our primary routes. This is called at the start of the
590 server to do authentication and key exchange with our router - called
593 SILC_TASK_CALLBACK(silc_server_connect_to_router)
595 SilcServer server = (SilcServer)context;
596 SilcServerConnection sconn;
598 SILC_LOG_DEBUG(("Connecting to router(s)"));
600 /* If we are normal SILC server we need to connect to our cell's
602 if (server->server_type == SILC_SERVER) {
603 SILC_LOG_DEBUG(("We are normal server"));
605 /* Create connection to the router, if configured. */
606 if (server->config->routers) {
608 /* Allocate connection object for hold connection specific stuff. */
609 sconn = silc_calloc(1, sizeof(*sconn));
610 sconn->server = server;
611 sconn->remote_host = strdup(server->config->routers->host);
612 sconn->remote_port = server->config->routers->port;
614 silc_task_register(server->timeout_queue, fd,
615 silc_server_connect_router,
616 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
617 SILC_TASK_PRI_NORMAL);
622 /* If we are a SILC router we need to establish all of our primary
624 if (server->server_type == SILC_ROUTER) {
625 SilcServerConfigSectionServerConnection *ptr;
627 SILC_LOG_DEBUG(("We are router"));
629 /* Create the connections to all our routes */
630 ptr = server->config->routers;
633 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
634 ptr->initiator ? "Initiator" : "Responder",
635 ptr->host, ptr->port));
637 if (ptr->initiator) {
638 /* Allocate connection object for hold connection specific stuff. */
639 sconn = silc_calloc(1, sizeof(*sconn));
640 sconn->server = server;
641 sconn->remote_host = strdup(ptr->host);
642 sconn->remote_port = ptr->port;
644 silc_task_register(server->timeout_queue, fd,
645 silc_server_connect_router,
646 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
647 SILC_TASK_PRI_NORMAL);
657 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
659 /* There wasn't a configured router, we will continue but we don't
660 have a connection to outside world. We will be standalone server. */
661 server->standalone = TRUE;
664 /* Second part of connecting to router(s). Key exchange protocol has been
665 executed and now we will execute authentication protocol. */
667 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
669 SilcProtocol protocol = (SilcProtocol)context;
670 SilcServerKEInternalContext *ctx =
671 (SilcServerKEInternalContext *)protocol->context;
672 SilcServer server = (SilcServer)ctx->server;
673 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
674 SilcSocketConnection sock = server->sockets[fd];
675 SilcServerConnAuthInternalContext *proto_ctx;
676 SilcServerConfigSectionServerConnection *conn = NULL;
678 SILC_LOG_DEBUG(("Start"));
680 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
681 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
682 /* Error occured during protocol */
683 silc_protocol_free(protocol);
684 sock->protocol = NULL;
685 silc_ske_free_key_material(ctx->keymat);
687 silc_packet_context_free(ctx->packet);
689 silc_ske_free(ctx->ske);
691 silc_free(ctx->dest_id);
693 silc_task_unregister_by_callback(server->timeout_queue,
694 silc_server_failure_callback);
695 silc_server_disconnect_remote(server, sock, "Server closed connection: "
696 "Key exchange failed");
700 /* We now have the key material as the result of the key exchange
701 protocol. Take the key material into use. Free the raw key material
702 as soon as we've set them into use. */
703 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
704 ctx->ske->prop->cipher,
705 ctx->ske->prop->pkcs,
706 ctx->ske->prop->hash,
707 ctx->ske->prop->hmac,
708 ctx->ske->prop->group,
710 silc_protocol_free(protocol);
711 sock->protocol = NULL;
712 silc_ske_free_key_material(ctx->keymat);
714 silc_packet_context_free(ctx->packet);
716 silc_ske_free(ctx->ske);
718 silc_free(ctx->dest_id);
720 silc_task_unregister_by_callback(server->timeout_queue,
721 silc_server_failure_callback);
722 silc_server_disconnect_remote(server, sock, "Server closed connection: "
723 "Key exchange failed");
726 silc_ske_free_key_material(ctx->keymat);
728 /* Allocate internal context for the authentication protocol. This
729 is sent as context for the protocol. */
730 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
731 proto_ctx->server = (void *)server;
732 proto_ctx->context = (void *)sconn;
733 proto_ctx->sock = sock;
734 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
735 proto_ctx->dest_id_type = ctx->dest_id_type;
736 proto_ctx->dest_id = ctx->dest_id;
738 /* Resolve the authentication method used in this connection. Check if
739 we find a match from user configured connections */
740 conn = silc_server_config_find_router_conn(server->config,
744 /* Match found. Use the configured authentication method */
745 proto_ctx->auth_meth = conn->auth_meth;
746 if (conn->auth_data) {
747 proto_ctx->auth_data = strdup(conn->auth_data);
748 proto_ctx->auth_data_len = strlen(conn->auth_data);
751 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
752 sock->hostname, sock->ip, sock->port));
753 silc_protocol_free(protocol);
754 sock->protocol = NULL;
756 silc_packet_context_free(ctx->packet);
758 silc_ske_free(ctx->ske);
760 silc_free(ctx->dest_id);
762 silc_task_unregister_by_callback(server->timeout_queue,
763 silc_server_failure_callback);
764 silc_server_disconnect_remote(server, sock, "Server closed connection: "
765 "Key exchange failed");
769 /* Free old protocol as it is finished now */
770 silc_protocol_free(protocol);
772 silc_packet_context_free(ctx->packet);
774 sock->protocol = NULL;
776 /* Allocate the authentication protocol. This is allocated here
777 but we won't start it yet. We will be receiving party of this
778 protocol thus we will wait that connecting party will make
780 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
781 &sock->protocol, proto_ctx,
782 silc_server_connect_to_router_final);
784 /* Register timeout task. If the protocol is not executed inside
785 this timelimit the connection will be terminated. Currently
786 this is 15 seconds and is hard coded limit (XXX). */
787 proto_ctx->timeout_task =
788 silc_task_register(server->timeout_queue, sock->sock,
789 silc_server_timeout_remote,
790 (void *)server, 15, 0,
794 /* Run the protocol */
795 sock->protocol->execute(server->timeout_queue, 0,
796 sock->protocol, sock->sock, 0, 0);
799 /* Finalizes the connection to router. Registers a server task to the
800 queue so that we can accept new connections. */
802 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
804 SilcProtocol protocol = (SilcProtocol)context;
805 SilcServerConnAuthInternalContext *ctx =
806 (SilcServerConnAuthInternalContext *)protocol->context;
807 SilcServer server = (SilcServer)ctx->server;
808 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
809 SilcSocketConnection sock = ctx->sock;
810 SilcServerEntry id_entry;
812 SilcServerHBContext hb_context;
813 unsigned char *id_string;
814 SilcIDListData idata;
816 SILC_LOG_DEBUG(("Start"));
818 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
819 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
820 /* Error occured during protocol */
822 silc_free(ctx->dest_id);
823 silc_server_disconnect_remote(server, sock, "Server closed connection: "
824 "Authentication failed");
828 /* Add a task to the queue. This task receives new connections to the
829 server. This task remains on the queue until the end of the program. */
830 if (!server->listenning) {
831 silc_task_register(server->io_queue, server->sock,
832 silc_server_accept_new_connection,
833 (void *)server, 0, 0,
835 SILC_TASK_PRI_NORMAL);
836 server->listenning = TRUE;
839 /* Send NEW_SERVER packet to the router. We will become registered
840 to the SILC network after sending this packet. */
841 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
842 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
843 strlen(server->server_name));
844 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
845 silc_buffer_format(packet,
846 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
847 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
848 SILC_STR_UI_SHORT(strlen(server->server_name)),
849 SILC_STR_UI_XNSTRING(server->server_name,
850 strlen(server->server_name)),
853 /* Send the packet */
854 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
855 packet->data, packet->len, TRUE);
856 silc_buffer_free(packet);
857 silc_free(id_string);
859 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
861 /* Add the connected router to local server list */
862 server->standalone = FALSE;
863 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
864 SILC_ROUTER, ctx->dest_id, NULL, sock);
867 silc_free(ctx->dest_id);
868 silc_server_disconnect_remote(server, sock, "Server closed connection: "
869 "Authentication failed");
873 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
874 silc_free(sock->user_data);
875 sock->user_data = (void *)id_entry;
876 sock->type = SILC_SOCKET_TYPE_ROUTER;
877 server->id_entry->router = id_entry;
878 server->router = id_entry;
879 idata = (SilcIDListData)sock->user_data;
880 idata->registered = TRUE;
882 /* Perform keepalive. The `hb_context' will be freed automatically
883 when finally calling the silc_socket_free function. XXX hardcoded
885 hb_context = silc_calloc(1, sizeof(*hb_context));
886 hb_context->server = server;
887 silc_socket_set_heartbeat(sock, 600, hb_context,
888 silc_server_perform_heartbeat,
889 server->timeout_queue);
891 /* Register re-key timeout */
892 idata->rekey->timeout = 3600; /* XXX hardcoded */
893 idata->rekey->context = (void *)server;
894 silc_task_register(server->timeout_queue, sock->sock,
895 silc_server_rekey_callback,
896 (void *)sock, idata->rekey->timeout, 0,
897 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
899 /* If we are router then announce our possible servers. */
900 if (server->server_type == SILC_ROUTER)
901 silc_server_announce_servers(server);
903 /* Announce our clients and channels to the router */
904 silc_server_announce_clients(server);
905 silc_server_announce_channels(server);
908 /* Free the temporary connection data context */
910 silc_free(sconn->remote_host);
914 /* Free the protocol object */
915 silc_protocol_free(protocol);
917 silc_packet_context_free(ctx->packet);
919 silc_ske_free(ctx->ske);
921 sock->protocol = NULL;
924 /* Accepts new connections to the server. Accepting new connections are
925 done in three parts to make it async. */
927 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
929 SilcServer server = (SilcServer)context;
930 SilcSocketConnection newsocket;
931 SilcServerKEInternalContext *proto_ctx;
934 SILC_LOG_DEBUG(("Accepting new connection"));
936 server->stat.conn_attempts++;
938 sock = silc_net_accept_connection(server->sock);
940 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
941 server->stat.conn_failures++;
945 /* Check max connections */
946 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
947 SILC_LOG_ERROR(("Refusing connection, server is full"));
948 server->stat.conn_failures++;
952 /* Set socket options */
953 silc_net_set_socket_nonblock(sock);
954 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
956 /* We don't create a ID yet, since we don't know what type of connection
957 this is yet. But, we do add the connection to the socket table. */
958 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
959 server->sockets[sock] = newsocket;
961 /* XXX This MUST be done async as this will block the entire server
962 process. Either we have to do our own resolver stuff or in the future
963 we can use threads. */
964 /* Perform name and address lookups for the remote host. */
965 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
967 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
969 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
970 newsocket->hostname ? newsocket->hostname :
971 newsocket->ip ? newsocket->ip : ""));
972 server->stat.conn_failures++;
975 if (!newsocket->hostname)
976 newsocket->hostname = strdup(newsocket->ip);
978 newsocket->port = silc_net_get_remote_port(sock);
980 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
983 /* Allocate internal context for key exchange protocol. This is
984 sent as context for the protocol. */
985 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
986 proto_ctx->server = context;
987 proto_ctx->sock = newsocket;
988 proto_ctx->rng = server->rng;
989 proto_ctx->responder = TRUE;
991 /* Prepare the connection for key exchange protocol. We allocate the
992 protocol but will not start it yet. The connector will be the
993 initiator of the protocol thus we will wait for initiation from
994 there before we start the protocol. */
995 server->stat.auth_attempts++;
996 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
997 &newsocket->protocol, proto_ctx,
998 silc_server_accept_new_connection_second);
1000 /* Register a timeout task that will be executed if the connector
1001 will not start the key exchange protocol within 60 seconds. For
1002 now, this is a hard coded limit. After 60 secs the connection will
1003 be closed if the key exchange protocol has not been started. */
1004 proto_ctx->timeout_task =
1005 silc_task_register(server->timeout_queue, newsocket->sock,
1006 silc_server_timeout_remote,
1011 /* Register the connection for network input and output. This sets
1012 that scheduler will listen for incoming packets for this connection
1013 and sets that outgoing packets may be sent to this connection as well.
1014 However, this doesn't set the scheduler for outgoing traffic, it
1015 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1016 later when outgoing data is available. */
1017 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1020 /* Second part of accepting new connection. Key exchange protocol has been
1021 performed and now it is time to do little connection authentication
1022 protocol to figure out whether this connection is client or server
1023 and whether it has right to access this server (especially server
1024 connections needs to be authenticated). */
1026 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1028 SilcProtocol protocol = (SilcProtocol)context;
1029 SilcServerKEInternalContext *ctx =
1030 (SilcServerKEInternalContext *)protocol->context;
1031 SilcServer server = (SilcServer)ctx->server;
1032 SilcSocketConnection sock = server->sockets[fd];
1033 SilcServerConnAuthInternalContext *proto_ctx;
1035 SILC_LOG_DEBUG(("Start"));
1037 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1038 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1039 /* Error occured during protocol */
1040 silc_protocol_free(protocol);
1041 sock->protocol = NULL;
1042 silc_ske_free_key_material(ctx->keymat);
1044 silc_packet_context_free(ctx->packet);
1046 silc_ske_free(ctx->ske);
1048 silc_free(ctx->dest_id);
1050 silc_task_unregister_by_callback(server->timeout_queue,
1051 silc_server_failure_callback);
1052 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1053 "Key exchange failed");
1054 server->stat.auth_failures++;
1058 /* We now have the key material as the result of the key exchange
1059 protocol. Take the key material into use. Free the raw key material
1060 as soon as we've set them into use. */
1061 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1062 ctx->ske->prop->cipher,
1063 ctx->ske->prop->pkcs,
1064 ctx->ske->prop->hash,
1065 ctx->ske->prop->hmac,
1066 ctx->ske->prop->group,
1068 silc_protocol_free(protocol);
1069 sock->protocol = NULL;
1070 silc_ske_free_key_material(ctx->keymat);
1072 silc_packet_context_free(ctx->packet);
1074 silc_ske_free(ctx->ske);
1076 silc_free(ctx->dest_id);
1078 silc_task_unregister_by_callback(server->timeout_queue,
1079 silc_server_failure_callback);
1080 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1081 "Key exchange failed");
1082 server->stat.auth_failures++;
1085 silc_ske_free_key_material(ctx->keymat);
1087 /* Allocate internal context for the authentication protocol. This
1088 is sent as context for the protocol. */
1089 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1090 proto_ctx->server = (void *)server;
1091 proto_ctx->sock = sock;
1092 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1093 proto_ctx->responder = TRUE;
1094 proto_ctx->dest_id_type = ctx->dest_id_type;
1095 proto_ctx->dest_id = ctx->dest_id;
1097 /* Free old protocol as it is finished now */
1098 silc_protocol_free(protocol);
1100 silc_packet_context_free(ctx->packet);
1102 sock->protocol = NULL;
1104 /* Allocate the authentication protocol. This is allocated here
1105 but we won't start it yet. We will be receiving party of this
1106 protocol thus we will wait that connecting party will make
1107 their first move. */
1108 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1109 &sock->protocol, proto_ctx,
1110 silc_server_accept_new_connection_final);
1112 /* Register timeout task. If the protocol is not executed inside
1113 this timelimit the connection will be terminated. Currently
1114 this is 60 seconds and is hard coded limit (XXX). */
1115 proto_ctx->timeout_task =
1116 silc_task_register(server->timeout_queue, sock->sock,
1117 silc_server_timeout_remote,
1118 (void *)server, 60, 0,
1123 /* Final part of accepting new connection. The connection has now
1124 been authenticated and keys has been exchanged. We also know whether
1125 this is client or server connection. */
1127 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1129 SilcProtocol protocol = (SilcProtocol)context;
1130 SilcServerConnAuthInternalContext *ctx =
1131 (SilcServerConnAuthInternalContext *)protocol->context;
1132 SilcServer server = (SilcServer)ctx->server;
1133 SilcSocketConnection sock = ctx->sock;
1134 SilcServerHBContext hb_context;
1135 void *id_entry = NULL;
1137 SILC_LOG_DEBUG(("Start"));
1139 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1140 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1141 /* Error occured during protocol */
1142 silc_protocol_free(protocol);
1143 sock->protocol = NULL;
1145 silc_packet_context_free(ctx->packet);
1147 silc_ske_free(ctx->ske);
1149 silc_free(ctx->dest_id);
1152 sock->protocol = NULL;
1153 silc_task_unregister_by_callback(server->timeout_queue,
1154 silc_server_failure_callback);
1155 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1156 "Authentication failed");
1157 server->stat.auth_failures++;
1161 sock->type = ctx->conn_type;
1162 switch(sock->type) {
1163 case SILC_SOCKET_TYPE_CLIENT:
1165 SilcClientEntry client;
1167 SILC_LOG_DEBUG(("Remote host is client"));
1168 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1171 /* Add the client to the client ID cache. The nickname and Client ID
1172 and other information is created after we have received NEW_CLIENT
1173 packet from client. */
1174 client = silc_idlist_add_client(server->local_list,
1175 NULL, 0, NULL, NULL, NULL, NULL, sock);
1177 SILC_LOG_ERROR(("Could not add new client to cache"));
1178 silc_free(sock->user_data);
1183 server->stat.my_clients++;
1184 server->stat.clients++;
1185 if (server->server_type == SILC_ROUTER)
1186 server->stat.cell_clients++;
1188 id_entry = (void *)client;
1191 case SILC_SOCKET_TYPE_SERVER:
1192 case SILC_SOCKET_TYPE_ROUTER:
1194 SilcServerEntry new_server;
1196 SILC_LOG_DEBUG(("Remote host is %s",
1197 sock->type == SILC_SOCKET_TYPE_SERVER ?
1198 "server" : "router"));
1199 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1200 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1201 "server" : "router"));
1203 /* Add the server into server cache. The server name and Server ID
1204 is updated after we have received NEW_SERVER packet from the
1205 server. We mark ourselves as router for this server if we really
1208 silc_idlist_add_server(server->local_list, NULL,
1209 sock->type == SILC_SOCKET_TYPE_SERVER ?
1210 SILC_SERVER : SILC_ROUTER, NULL,
1211 sock->type == SILC_SOCKET_TYPE_SERVER ?
1212 server->id_entry : NULL, sock);
1214 SILC_LOG_ERROR(("Could not add new server to cache"));
1215 silc_free(sock->user_data);
1220 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1221 server->stat.my_servers++;
1223 server->stat.my_routers++;
1224 server->stat.servers++;
1226 id_entry = (void *)new_server;
1228 /* There is connection to other server now, if it is router then
1229 we will have connection to outside world. If we are router but
1230 normal server connected to us then we will remain standalone,
1231 if we are standlone. */
1232 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1233 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1234 server->standalone = FALSE;
1235 if (!server->id_entry->router) {
1236 server->id_entry->router = id_entry;
1237 server->router = id_entry;
1246 /* Add the common data structure to the ID entry. */
1248 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1250 /* Add to sockets internal pointer for fast referencing */
1251 silc_free(sock->user_data);
1252 sock->user_data = id_entry;
1254 /* Connection has been fully established now. Everything is ok. */
1255 SILC_LOG_DEBUG(("New connection authenticated"));
1257 /* Perform keepalive. The `hb_context' will be freed automatically
1258 when finally calling the silc_socket_free function. XXX hardcoded
1260 hb_context = silc_calloc(1, sizeof(*hb_context));
1261 hb_context->server = server;
1262 silc_socket_set_heartbeat(sock, 600, hb_context,
1263 silc_server_perform_heartbeat,
1264 server->timeout_queue);
1266 silc_task_unregister_by_callback(server->timeout_queue,
1267 silc_server_failure_callback);
1268 silc_protocol_free(protocol);
1270 silc_packet_context_free(ctx->packet);
1272 silc_ske_free(ctx->ske);
1274 silc_free(ctx->dest_id);
1276 sock->protocol = NULL;
1279 /* This function is used to read packets from network and send packets to
1280 network. This is usually a generic task. */
1282 SILC_TASK_CALLBACK(silc_server_packet_process)
1284 SilcServer server = (SilcServer)context;
1285 SilcSocketConnection sock = server->sockets[fd];
1286 SilcIDListData idata;
1287 SilcCipher cipher = NULL;
1288 SilcHmac hmac = NULL;
1294 SILC_LOG_DEBUG(("Processing packet"));
1296 /* Packet sending */
1298 if (type == SILC_TASK_WRITE) {
1299 /* Do not send data to disconnected connection */
1300 if (SILC_IS_DISCONNECTED(sock))
1303 server->stat.packets_sent++;
1305 if (sock->outbuf->data - sock->outbuf->head)
1306 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1308 /* Send the packet */
1309 ret = silc_packet_send(sock, TRUE);
1311 /* If returned -2 could not write to connection now, will do
1319 /* The packet has been sent and now it is time to set the connection
1320 back to only for input. When there is again some outgoing data
1321 available for this connection it will be set for output as well.
1322 This call clears the output setting and sets it only for input. */
1323 SILC_SET_CONNECTION_FOR_INPUT(fd);
1324 SILC_UNSET_OUTBUF_PENDING(sock);
1326 silc_buffer_clear(sock->outbuf);
1330 /* Packet receiving */
1332 /* Read some data from connection */
1333 ret = silc_packet_receive(sock);
1339 SILC_LOG_DEBUG(("Read EOF"));
1341 /* If connection is disconnecting already we will finally
1342 close the connection */
1343 if (SILC_IS_DISCONNECTING(sock)) {
1344 if (sock->user_data)
1345 silc_server_free_sock_user_data(server, sock);
1346 silc_server_close_connection(server, sock);
1350 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1351 SILC_SET_DISCONNECTING(sock);
1353 /* If the closed connection was our primary router connection the
1354 start re-connecting phase. */
1355 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1356 sock == server->router->connection)
1357 silc_task_register(server->timeout_queue, 0,
1358 silc_server_connect_to_router,
1361 SILC_TASK_PRI_NORMAL);
1363 if (sock->user_data)
1364 silc_server_free_sock_user_data(server, sock);
1365 silc_server_close_connection(server, sock);
1369 /* If connection is disconnecting or disconnected we will ignore
1371 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1372 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1376 server->stat.packets_received++;
1378 /* Get keys and stuff from ID entry */
1379 idata = (SilcIDListData)sock->user_data;
1381 idata->last_receive = time(NULL);
1382 cipher = idata->receive_key;
1383 hmac = idata->hmac_receive;
1386 /* Process the packet. This will call the parser that will then
1387 decrypt and parse the packet. */
1388 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1392 /* Callback function that the silc_packet_decrypt will call to make the
1393 decision whether the packet is normal or special packet. We will
1394 return TRUE if it is normal and FALSE if it is special */
1396 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1398 SilcPacketContext *packet,
1401 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1402 SilcServer server = (SilcServer)parse_ctx->context;
1404 /* Packet is normal packet, if:
1406 1) packet is private message packet and does not have private key set
1407 2) is other packet than channel message packet
1408 3) is channel message packet and remote is router and we are router
1410 all other packets are special packets
1413 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1414 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1417 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1418 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1419 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1420 server->server_type == SILC_ROUTER))
1426 /* Parses whole packet, received earlier. */
1428 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1430 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1431 SilcServer server = (SilcServer)parse_ctx->context;
1432 SilcSocketConnection sock = parse_ctx->sock;
1433 SilcPacketContext *packet = parse_ctx->packet;
1434 SilcIDListData idata = (SilcIDListData)sock->user_data;
1437 SILC_LOG_DEBUG(("Start"));
1439 /* Decrypt the received packet */
1440 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1441 idata ? idata->hmac_receive : NULL,
1442 packet->buffer, packet,
1443 silc_server_packet_decrypt_check, parse_ctx);
1448 /* Parse the packet. Packet type is returned. */
1449 ret = silc_packet_parse(packet);
1451 /* Parse the packet header in special way as this is "special"
1453 ret = silc_packet_parse_special(packet);
1456 if (ret == SILC_PACKET_NONE)
1459 /* Check that the the current client ID is same as in the client's packet. */
1460 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1461 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1462 if (client && client->id) {
1463 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1464 packet->src_id_type);
1465 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1473 if (server->server_type == SILC_ROUTER) {
1474 /* Route the packet if it is not destined to us. Other ID types but
1475 server are handled separately after processing them. */
1476 if (packet->dst_id_type == SILC_ID_SERVER &&
1477 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1478 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1480 /* Route the packet to fastest route for the destination ID */
1481 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1482 packet->dst_id_type);
1485 silc_server_packet_route(server,
1486 silc_server_route_get(server, id,
1487 packet->dst_id_type),
1493 /* Broadcast packet if it is marked as broadcast packet and it is
1494 originated from router and we are router. */
1495 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1496 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1497 silc_server_packet_broadcast(server, server->router->connection, packet);
1501 /* Parse the incoming packet type */
1502 silc_server_packet_parse_type(server, sock, packet);
1505 /* silc_buffer_clear(sock->inbuf); */
1506 silc_packet_context_free(packet);
1507 silc_free(parse_ctx);
1510 /* Parser callback called by silc_packet_receive_process. This merely
1511 registers timeout that will handle the actual parsing when appropriate. */
1513 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1515 SilcServer server = (SilcServer)parser_context->context;
1516 SilcSocketConnection sock = parser_context->sock;
1518 switch (sock->type) {
1519 case SILC_SOCKET_TYPE_UNKNOWN:
1520 case SILC_SOCKET_TYPE_CLIENT:
1521 /* Parse the packet with timeout */
1522 silc_task_register(server->timeout_queue, sock->sock,
1523 silc_server_packet_parse_real,
1524 (void *)parser_context, 0, 100000,
1526 SILC_TASK_PRI_NORMAL);
1528 case SILC_SOCKET_TYPE_SERVER:
1529 case SILC_SOCKET_TYPE_ROUTER:
1530 /* Packets from servers are parsed as soon as possible */
1531 silc_task_register(server->timeout_queue, sock->sock,
1532 silc_server_packet_parse_real,
1533 (void *)parser_context, 0, 1,
1535 SILC_TASK_PRI_NORMAL);
1542 /* Parses the packet type and calls what ever routines the packet type
1543 requires. This is done for all incoming packets. */
1545 void silc_server_packet_parse_type(SilcServer server,
1546 SilcSocketConnection sock,
1547 SilcPacketContext *packet)
1549 SilcPacketType type = packet->type;
1551 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1553 /* Parse the packet type */
1555 case SILC_PACKET_DISCONNECT:
1556 SILC_LOG_DEBUG(("Disconnect packet"));
1557 if (packet->flags & SILC_PACKET_FLAG_LIST)
1561 case SILC_PACKET_SUCCESS:
1563 * Success received for something. For now we can have only
1564 * one protocol for connection executing at once hence this
1565 * success message is for whatever protocol is executing currently.
1567 SILC_LOG_DEBUG(("Success packet"));
1568 if (packet->flags & SILC_PACKET_FLAG_LIST)
1570 if (sock->protocol) {
1571 sock->protocol->execute(server->timeout_queue, 0,
1572 sock->protocol, sock->sock, 0, 0);
1576 case SILC_PACKET_FAILURE:
1578 * Failure received for something. For now we can have only
1579 * one protocol for connection executing at once hence this
1580 * failure message is for whatever protocol is executing currently.
1582 SILC_LOG_DEBUG(("Failure packet"));
1583 if (packet->flags & SILC_PACKET_FLAG_LIST)
1585 if (sock->protocol) {
1586 SilcServerFailureContext f;
1587 f = silc_calloc(1, sizeof(*f));
1591 /* We will wait 5 seconds to process this failure packet */
1592 silc_task_register(server->timeout_queue, sock->sock,
1593 silc_server_failure_callback, (void *)f, 5, 0,
1594 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1598 case SILC_PACKET_REJECT:
1599 SILC_LOG_DEBUG(("Reject packet"));
1600 if (packet->flags & SILC_PACKET_FLAG_LIST)
1605 case SILC_PACKET_NOTIFY:
1607 * Received notify packet. Server can receive notify packets from
1608 * router. Server then relays the notify messages to clients if needed.
1610 SILC_LOG_DEBUG(("Notify packet"));
1611 if (packet->flags & SILC_PACKET_FLAG_LIST)
1612 silc_server_notify_list(server, sock, packet);
1614 silc_server_notify(server, sock, packet);
1620 case SILC_PACKET_CHANNEL_MESSAGE:
1622 * Received channel message. Channel messages are special packets
1623 * (although probably most common ones) thus they are handled
1626 SILC_LOG_DEBUG(("Channel Message packet"));
1627 if (packet->flags & SILC_PACKET_FLAG_LIST)
1629 silc_server_channel_message(server, sock, packet);
1632 case SILC_PACKET_CHANNEL_KEY:
1634 * Received key for channel. As channels are created by the router
1635 * the keys are as well. We will distribute the key to all of our
1636 * locally connected clients on the particular channel. Router
1637 * never receives this channel and thus is ignored.
1639 SILC_LOG_DEBUG(("Channel Key packet"));
1640 if (packet->flags & SILC_PACKET_FLAG_LIST)
1642 silc_server_channel_key(server, sock, packet);
1648 case SILC_PACKET_COMMAND:
1650 * Recived command. Processes the command request and allocates the
1651 * command context and calls the command.
1653 SILC_LOG_DEBUG(("Command packet"));
1654 if (packet->flags & SILC_PACKET_FLAG_LIST)
1656 silc_server_command_process(server, sock, packet);
1659 case SILC_PACKET_COMMAND_REPLY:
1661 * Received command reply packet. Received command reply to command. It
1662 * may be reply to command sent by us or reply to command sent by client
1663 * that we've routed further.
1665 SILC_LOG_DEBUG(("Command Reply packet"));
1666 if (packet->flags & SILC_PACKET_FLAG_LIST)
1668 silc_server_command_reply(server, sock, packet);
1672 * Private Message packets
1674 case SILC_PACKET_PRIVATE_MESSAGE:
1676 * Received private message packet. The packet is coming from either
1679 SILC_LOG_DEBUG(("Private Message packet"));
1680 if (packet->flags & SILC_PACKET_FLAG_LIST)
1682 silc_server_private_message(server, sock, packet);
1685 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1687 * Private message key packet.
1689 if (packet->flags & SILC_PACKET_FLAG_LIST)
1691 silc_server_private_message_key(server, sock, packet);
1695 * Key Exchange protocol packets
1697 case SILC_PACKET_KEY_EXCHANGE:
1698 SILC_LOG_DEBUG(("KE packet"));
1699 if (packet->flags & SILC_PACKET_FLAG_LIST)
1702 if (sock->protocol && sock->protocol->protocol &&
1703 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1705 SilcServerKEInternalContext *proto_ctx =
1706 (SilcServerKEInternalContext *)sock->protocol->context;
1708 proto_ctx->packet = silc_packet_context_dup(packet);
1710 /* Let the protocol handle the packet */
1711 sock->protocol->execute(server->timeout_queue, 0,
1712 sock->protocol, sock->sock, 0, 100000);
1714 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1715 "protocol active, packet dropped."));
1717 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1721 case SILC_PACKET_KEY_EXCHANGE_1:
1722 SILC_LOG_DEBUG(("KE 1 packet"));
1723 if (packet->flags & SILC_PACKET_FLAG_LIST)
1726 if (sock->protocol && sock->protocol->protocol &&
1727 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1728 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1730 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1731 SilcServerRekeyInternalContext *proto_ctx =
1732 (SilcServerRekeyInternalContext *)sock->protocol->context;
1734 if (proto_ctx->packet)
1735 silc_packet_context_free(proto_ctx->packet);
1737 proto_ctx->packet = silc_packet_context_dup(packet);
1739 /* Let the protocol handle the packet */
1740 sock->protocol->execute(server->timeout_queue, 0,
1741 sock->protocol, sock->sock, 0, 0);
1743 SilcServerKEInternalContext *proto_ctx =
1744 (SilcServerKEInternalContext *)sock->protocol->context;
1746 if (proto_ctx->packet)
1747 silc_packet_context_free(proto_ctx->packet);
1749 proto_ctx->packet = silc_packet_context_dup(packet);
1750 proto_ctx->dest_id_type = packet->src_id_type;
1751 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1752 packet->src_id_type);
1753 if (!proto_ctx->dest_id)
1756 /* Let the protocol handle the packet */
1757 sock->protocol->execute(server->timeout_queue, 0,
1758 sock->protocol, sock->sock,
1762 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1763 "protocol active, packet dropped."));
1767 case SILC_PACKET_KEY_EXCHANGE_2:
1768 SILC_LOG_DEBUG(("KE 2 packet"));
1769 if (packet->flags & SILC_PACKET_FLAG_LIST)
1772 if (sock->protocol && sock->protocol->protocol &&
1773 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1774 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1776 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1777 SilcServerRekeyInternalContext *proto_ctx =
1778 (SilcServerRekeyInternalContext *)sock->protocol->context;
1780 if (proto_ctx->packet)
1781 silc_packet_context_free(proto_ctx->packet);
1783 proto_ctx->packet = silc_packet_context_dup(packet);
1785 /* Let the protocol handle the packet */
1786 sock->protocol->execute(server->timeout_queue, 0,
1787 sock->protocol, sock->sock, 0, 0);
1789 SilcServerKEInternalContext *proto_ctx =
1790 (SilcServerKEInternalContext *)sock->protocol->context;
1792 if (proto_ctx->packet)
1793 silc_packet_context_free(proto_ctx->packet);
1795 proto_ctx->packet = silc_packet_context_dup(packet);
1796 proto_ctx->dest_id_type = packet->src_id_type;
1797 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1798 packet->src_id_type);
1799 if (!proto_ctx->dest_id)
1802 /* Let the protocol handle the packet */
1803 sock->protocol->execute(server->timeout_queue, 0,
1804 sock->protocol, sock->sock,
1808 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1809 "protocol active, packet dropped."));
1813 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1815 * Connection authentication request packet. When we receive this packet
1816 * we will send to the other end information about our mandatory
1817 * authentication method for the connection. This packet maybe received
1820 SILC_LOG_DEBUG(("Connection authentication request packet"));
1821 if (packet->flags & SILC_PACKET_FLAG_LIST)
1823 silc_server_connection_auth_request(server, sock, packet);
1827 * Connection Authentication protocol packets
1829 case SILC_PACKET_CONNECTION_AUTH:
1830 /* Start of the authentication protocol. We receive here the
1831 authentication data and will verify it. */
1832 SILC_LOG_DEBUG(("Connection auth packet"));
1833 if (packet->flags & SILC_PACKET_FLAG_LIST)
1836 if (sock->protocol && sock->protocol->protocol->type
1837 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1839 SilcServerConnAuthInternalContext *proto_ctx =
1840 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1842 proto_ctx->packet = silc_packet_context_dup(packet);
1844 /* Let the protocol handle the packet */
1845 sock->protocol->execute(server->timeout_queue, 0,
1846 sock->protocol, sock->sock, 0, 0);
1848 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1849 "protocol active, packet dropped."));
1853 case SILC_PACKET_NEW_ID:
1855 * Received New ID packet. This includes some new ID that has been
1856 * created. It may be for client, server or channel. This is the way
1857 * to distribute information about new registered entities in the
1860 SILC_LOG_DEBUG(("New ID packet"));
1861 if (packet->flags & SILC_PACKET_FLAG_LIST)
1862 silc_server_new_id_list(server, sock, packet);
1864 silc_server_new_id(server, sock, packet);
1867 case SILC_PACKET_NEW_CLIENT:
1869 * Received new client packet. This includes client information that
1870 * we will use to create initial client ID. After creating new
1871 * ID we will send it to the client.
1873 SILC_LOG_DEBUG(("New Client packet"));
1874 if (packet->flags & SILC_PACKET_FLAG_LIST)
1876 silc_server_new_client(server, sock, packet);
1879 case SILC_PACKET_NEW_SERVER:
1881 * Received new server packet. This includes Server ID and some other
1882 * information that we may save. This is received after server has
1885 SILC_LOG_DEBUG(("New Server packet"));
1886 if (packet->flags & SILC_PACKET_FLAG_LIST)
1888 silc_server_new_server(server, sock, packet);
1891 case SILC_PACKET_NEW_CHANNEL:
1893 * Received new channel packet. Information about new channel in the
1894 * network are distributed using this packet.
1896 SILC_LOG_DEBUG(("New Channel packet"));
1897 if (packet->flags & SILC_PACKET_FLAG_LIST)
1898 silc_server_new_channel_list(server, sock, packet);
1900 silc_server_new_channel(server, sock, packet);
1903 case SILC_PACKET_HEARTBEAT:
1905 * Received heartbeat.
1907 SILC_LOG_DEBUG(("Heartbeat packet"));
1908 if (packet->flags & SILC_PACKET_FLAG_LIST)
1912 case SILC_PACKET_KEY_AGREEMENT:
1914 * Received heartbeat.
1916 SILC_LOG_DEBUG(("Key agreement packet"));
1917 if (packet->flags & SILC_PACKET_FLAG_LIST)
1919 silc_server_key_agreement(server, sock, packet);
1922 case SILC_PACKET_REKEY:
1924 * Received re-key packet. The sender wants to regenerate the session
1927 SILC_LOG_DEBUG(("Re-key packet"));
1928 if (packet->flags & SILC_PACKET_FLAG_LIST)
1930 silc_server_rekey(server, sock, packet);
1933 case SILC_PACKET_REKEY_DONE:
1935 * The re-key is done.
1937 SILC_LOG_DEBUG(("Re-key done packet"));
1938 if (packet->flags & SILC_PACKET_FLAG_LIST)
1941 if (sock->protocol && sock->protocol->protocol &&
1942 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1944 SilcServerRekeyInternalContext *proto_ctx =
1945 (SilcServerRekeyInternalContext *)sock->protocol->context;
1947 if (proto_ctx->packet)
1948 silc_packet_context_free(proto_ctx->packet);
1950 proto_ctx->packet = silc_packet_context_dup(packet);
1952 /* Let the protocol handle the packet */
1953 sock->protocol->execute(server->timeout_queue, 0,
1954 sock->protocol, sock->sock, 0, 0);
1956 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1957 "protocol active, packet dropped."));
1962 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1968 /* Creates connection to a remote router. */
1970 void silc_server_create_connection(SilcServer server,
1971 char *remote_host, uint32 port)
1973 SilcServerConnection sconn;
1975 /* Allocate connection object for hold connection specific stuff. */
1976 sconn = silc_calloc(1, sizeof(*sconn));
1977 sconn->server = server;
1978 sconn->remote_host = strdup(remote_host);
1979 sconn->remote_port = port;
1981 silc_task_register(server->timeout_queue, 0,
1982 silc_server_connect_router,
1983 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1984 SILC_TASK_PRI_NORMAL);
1987 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1989 silc_socket_free((SilcSocketConnection)context);
1992 /* Closes connection to socket connection */
1994 void silc_server_close_connection(SilcServer server,
1995 SilcSocketConnection sock)
1997 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
1999 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2000 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2001 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2002 "Router"), sock->sock));
2004 /* We won't listen for this connection anymore */
2005 silc_schedule_unset_listen_fd(sock->sock);
2007 /* Unregister all tasks */
2008 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2009 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2011 /* Close the actual connection */
2012 silc_net_close_connection(sock->sock);
2013 server->sockets[sock->sock] = NULL;
2015 silc_task_register(server->timeout_queue, 0,
2016 silc_server_close_connection_final,
2017 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2018 SILC_TASK_PRI_NORMAL);
2021 /* Sends disconnect message to remote connection and disconnects the
2024 void silc_server_disconnect_remote(SilcServer server,
2025 SilcSocketConnection sock,
2026 const char *fmt, ...)
2029 unsigned char buf[4096];
2034 memset(buf, 0, sizeof(buf));
2036 vsprintf(buf, fmt, ap);
2039 SILC_LOG_DEBUG(("Disconnecting remote host"));
2041 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2043 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2044 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2045 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2048 /* Notify remote end that the conversation is over. The notify message
2049 is tried to be sent immediately. */
2050 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2051 buf, strlen(buf), TRUE);
2053 /* Mark the connection to be disconnected */
2054 SILC_SET_DISCONNECTED(sock);
2055 silc_server_close_connection(server, sock);
2060 SilcClientEntry client;
2061 } *FreeClientInternal;
2063 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2065 FreeClientInternal i = (FreeClientInternal)context;
2067 silc_idlist_del_data(i->client);
2068 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2072 /* Frees client data and notifies about client's signoff. */
2074 void silc_server_free_client_data(SilcServer server,
2075 SilcSocketConnection sock,
2076 SilcClientEntry client,
2080 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2082 /* If there is pending outgoing data for the client then purge it
2083 to the network before removing the client entry. */
2084 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2085 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2086 server->stat.packets_sent++;
2088 if (sock->outbuf->data - sock->outbuf->head)
2089 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2091 silc_packet_send(sock, TRUE);
2093 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2094 SILC_UNSET_OUTBUF_PENDING(sock);
2095 silc_buffer_clear(sock->outbuf);
2098 /* Send SIGNOFF notify to routers. */
2099 if (notify && !server->standalone && server->router)
2100 silc_server_send_notify_signoff(server, server->router->connection,
2101 server->server_type == SILC_SERVER ?
2102 FALSE : TRUE, client->id,
2103 SILC_ID_CLIENT_LEN, signoff);
2105 /* Remove client from all channels */
2107 silc_server_remove_from_channels(server, NULL, client,
2108 TRUE, signoff, TRUE);
2110 silc_server_remove_from_channels(server, NULL, client,
2111 FALSE, NULL, FALSE);
2113 /* We will not delete the client entry right away. We will take it
2114 into history (for WHOWAS command) for 5 minutes */
2117 silc_task_register(server->timeout_queue, 0,
2118 silc_server_free_client_data_timeout,
2120 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2121 client->data.registered = FALSE;
2123 /* Free the client entry and everything in it */
2124 server->stat.my_clients--;
2125 server->stat.clients--;
2126 if (server->server_type == SILC_ROUTER)
2127 server->stat.cell_clients--;
2130 /* Frees user_data pointer from socket connection object. This also sends
2131 appropriate notify packets to the network to inform about leaving
2134 void silc_server_free_sock_user_data(SilcServer server,
2135 SilcSocketConnection sock)
2137 SILC_LOG_DEBUG(("Start"));
2139 switch(sock->type) {
2140 case SILC_SOCKET_TYPE_CLIENT:
2142 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2143 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2146 case SILC_SOCKET_TYPE_SERVER:
2147 case SILC_SOCKET_TYPE_ROUTER:
2149 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2151 /* Free all client entries that this server owns as they will
2152 become invalid now as well. */
2153 silc_server_remove_clients_by_server(server, user_data, TRUE);
2155 /* If this was our primary router connection then we're lost to
2156 the outside world. */
2157 if (server->router == user_data) {
2158 server->id_entry->router = NULL;
2159 server->router = NULL;
2160 server->standalone = TRUE;
2163 /* Free the server entry */
2164 silc_idlist_del_data(user_data);
2165 silc_idlist_del_server(server->local_list, user_data);
2166 server->stat.my_servers--;
2167 server->stat.servers--;
2168 if (server->server_type == SILC_ROUTER)
2169 server->stat.cell_servers--;
2174 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2176 silc_idlist_del_data(user_data);
2177 silc_free(user_data);
2182 sock->user_data = NULL;
2185 /* This function is used to remove all client entries by the server `entry'.
2186 This is called when the connection is lost to the server. In this case
2187 we must invalidate all the client entries owned by the server `entry'.
2188 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2189 distributed to our local clients. */
2191 int silc_server_remove_clients_by_server(SilcServer server,
2192 SilcServerEntry entry,
2195 SilcIDCacheList list = NULL;
2196 SilcIDCacheEntry id_cache = NULL;
2197 SilcClientEntry client = NULL;
2199 SilcClientEntry *clients = NULL;
2200 uint32 clients_c = 0;
2201 unsigned char **argv = NULL;
2202 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2205 SILC_LOG_DEBUG(("Start"));
2207 if (server_signoff) {
2208 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2209 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2210 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2211 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2212 argv[argc] = idp->data;
2213 argv_lens[argc] = idp->len;
2214 argv_types[argc] = argc + 1;
2216 silc_buffer_free(idp);
2219 if (silc_idcache_find_by_id(server->local_list->clients,
2220 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2222 if (silc_idcache_list_first(list, &id_cache)) {
2224 client = (SilcClientEntry)id_cache->context;
2225 if (client->data.registered == FALSE) {
2226 if (!silc_idcache_list_next(list, &id_cache))
2232 if (client->router != entry) {
2233 if (server_signoff && client->connection) {
2234 clients = silc_realloc(clients,
2235 sizeof(*clients) * (clients_c + 1));
2236 clients[clients_c] = client;
2240 if (!silc_idcache_list_next(list, &id_cache))
2246 if (server_signoff) {
2247 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2248 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2249 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2251 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2253 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2254 memcpy(argv[argc], idp->data, idp->len);
2255 argv_lens[argc] = idp->len;
2256 argv_types[argc] = argc + 1;
2258 silc_buffer_free(idp);
2261 /* Remove the client entry */
2262 silc_server_remove_from_channels(server, NULL, client, FALSE,
2264 silc_idlist_del_client(server->local_list, client);
2266 if (!silc_idcache_list_next(list, &id_cache))
2270 silc_idcache_list_free(list);
2273 if (silc_idcache_find_by_id(server->global_list->clients,
2274 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2276 if (silc_idcache_list_first(list, &id_cache)) {
2278 client = (SilcClientEntry)id_cache->context;
2279 if (client->data.registered == FALSE) {
2280 if (!silc_idcache_list_next(list, &id_cache))
2286 if (client->router != entry) {
2287 if (server_signoff && client->connection) {
2288 clients = silc_realloc(clients,
2289 sizeof(*clients) * (clients_c + 1));
2290 clients[clients_c] = client;
2294 if (!silc_idcache_list_next(list, &id_cache))
2300 if (server_signoff) {
2301 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2302 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2303 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2305 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2307 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2308 memcpy(argv[argc], idp->data, idp->len);
2309 argv_lens[argc] = idp->len;
2310 argv_types[argc] = argc + 1;
2312 silc_buffer_free(idp);
2315 /* Remove the client entry */
2316 silc_server_remove_from_channels(server, NULL, client, FALSE,
2318 silc_idlist_del_client(server->global_list, client);
2320 if (!silc_idcache_list_next(list, &id_cache))
2324 silc_idcache_list_free(list);
2327 /* Send the SERVER_SIGNOFF notify */
2328 if (server_signoff) {
2331 /* Send SERVER_SIGNOFF notify to our primary router */
2332 if (!server->standalone && server->router) {
2333 args = silc_argument_payload_encode(1, argv, argv_lens,
2335 silc_server_send_notify_args(server,
2336 server->router->connection,
2337 server->server_type ==
2338 SILC_SERVER ? FALSE : TRUE,
2339 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2341 silc_buffer_free(args);
2344 args = silc_argument_payload_encode(argc, argv, argv_lens,
2346 /* Send to local clients */
2347 for (i = 0; i < clients_c; i++) {
2348 silc_server_send_notify_args(server, clients[i]->connection,
2349 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2354 silc_buffer_free(args);
2356 silc_free(argv_lens);
2357 silc_free(argv_types);
2363 /* Checks whether given channel has global users. If it does this returns
2364 TRUE and FALSE if there is only locally connected clients on the channel. */
2366 int silc_server_channel_has_global(SilcChannelEntry channel)
2368 SilcChannelClientEntry chl;
2370 silc_list_start(channel->user_list);
2371 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2372 if (chl->client->router)
2379 /* Checks whether given channel has locally connected users. If it does this
2380 returns TRUE and FALSE if there is not one locally connected client. */
2382 int silc_server_channel_has_local(SilcChannelEntry channel)
2384 SilcChannelClientEntry chl;
2386 silc_list_start(channel->user_list);
2387 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2388 if (!chl->client->router)
2395 /* Removes client from all channels it has joined. This is used when client
2396 connection is disconnected. If the client on a channel is last, the
2397 channel is removed as well. This sends the SIGNOFF notify types. */
2399 void silc_server_remove_from_channels(SilcServer server,
2400 SilcSocketConnection sock,
2401 SilcClientEntry client,
2403 char *signoff_message,
2406 SilcChannelEntry channel;
2407 SilcChannelClientEntry chl;
2410 SILC_LOG_DEBUG(("Start"));
2412 if (!client || !client->id)
2415 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2417 /* Remove the client from all channels. The client is removed from
2418 the channels' user list. */
2419 silc_list_start(client->channels);
2420 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2421 channel = chl->channel;
2423 /* Remove channel from client's channel list */
2424 silc_list_del(client->channels, chl);
2426 /* Remove channel if there is no users anymore */
2427 if (server->server_type == SILC_ROUTER &&
2428 silc_list_count(channel->user_list) < 2) {
2429 server->stat.my_channels--;
2432 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2434 if (channel->founder_key) {
2435 /* The founder auth data exists, do not remove the channel entry */
2436 SilcChannelClientEntry chl2;
2440 silc_list_start(channel->user_list);
2441 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2442 silc_list_del(chl2->client->channels, chl2);
2443 silc_list_del(channel->user_list, chl2);
2449 if (!silc_idlist_del_channel(server->local_list, channel))
2450 silc_idlist_del_channel(server->global_list, channel);
2454 /* Remove client from channel's client list */
2455 silc_list_del(channel->user_list, chl);
2457 server->stat.my_chanclients--;
2459 /* If there is no global users on the channel anymore mark the channel
2460 as local channel. */
2461 if (server->server_type == SILC_SERVER &&
2462 !silc_server_channel_has_global(channel))
2463 channel->global_users = FALSE;
2465 /* If there is not at least one local user on the channel then we don't
2466 need the channel entry anymore, we can remove it safely. */
2467 if (server->server_type == SILC_SERVER &&
2468 !silc_server_channel_has_local(channel)) {
2469 /* Notify about leaving client if this channel has global users. */
2470 if (notify && channel->global_users)
2471 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2472 SILC_NOTIFY_TYPE_SIGNOFF,
2473 signoff_message ? 2 : 1,
2474 clidp->data, clidp->len,
2475 signoff_message, signoff_message ?
2476 strlen(signoff_message) : 0);
2478 server->stat.my_channels--;
2481 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2483 if (channel->founder_key) {
2484 /* The founder auth data exists, do not remove the channel entry */
2485 SilcChannelClientEntry chl2;
2489 silc_list_start(channel->user_list);
2490 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2491 silc_list_del(chl2->client->channels, chl2);
2492 silc_list_del(channel->user_list, chl2);
2498 if (!silc_idlist_del_channel(server->local_list, channel))
2499 silc_idlist_del_channel(server->global_list, channel);
2503 /* Send notify to channel about client leaving SILC and thus
2504 the entire channel. */
2506 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2507 SILC_NOTIFY_TYPE_SIGNOFF,
2508 signoff_message ? 2 : 1,
2509 clidp->data, clidp->len,
2510 signoff_message, signoff_message ?
2511 strlen(signoff_message) : 0);
2513 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2514 /* Re-generate channel key */
2515 silc_server_create_channel_key(server, channel, 0);
2517 /* Send the channel key to the channel. The key of course is not sent
2518 to the client who was removed from the channel. */
2519 silc_server_send_channel_key(server, client->connection, channel,
2520 server->server_type == SILC_ROUTER ?
2521 FALSE : !server->standalone);
2525 silc_buffer_free(clidp);
2528 /* Removes client from one channel. This is used for example when client
2529 calls LEAVE command to remove itself from the channel. Returns TRUE
2530 if channel still exists and FALSE if the channel is removed when
2531 last client leaves the channel. If `notify' is FALSE notify messages
2534 int silc_server_remove_from_one_channel(SilcServer server,
2535 SilcSocketConnection sock,
2536 SilcChannelEntry channel,
2537 SilcClientEntry client,
2540 SilcChannelEntry ch;
2541 SilcChannelClientEntry chl;
2544 SILC_LOG_DEBUG(("Start"));
2546 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2548 /* Remove the client from the channel. The client is removed from
2549 the channel's user list. */
2550 silc_list_start(client->channels);
2551 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2552 if (chl->channel != channel)
2557 /* Remove channel from client's channel list */
2558 silc_list_del(client->channels, chl);
2560 /* Remove channel if there is no users anymore */
2561 if (server->server_type == SILC_ROUTER &&
2562 silc_list_count(channel->user_list) < 2) {
2564 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2565 if (!silc_idlist_del_channel(server->local_list, channel))
2566 silc_idlist_del_channel(server->global_list, channel);
2567 silc_buffer_free(clidp);
2568 server->stat.my_channels--;
2572 /* Remove client from channel's client list */
2573 silc_list_del(channel->user_list, chl);
2575 server->stat.my_chanclients--;
2577 /* If there is no global users on the channel anymore mark the channel
2578 as local channel. */
2579 if (server->server_type == SILC_SERVER &&
2580 !silc_server_channel_has_global(channel))
2581 channel->global_users = FALSE;
2583 /* If there is not at least one local user on the channel then we don't
2584 need the channel entry anymore, we can remove it safely. */
2585 if (server->server_type == SILC_SERVER &&
2586 !silc_server_channel_has_local(channel)) {
2587 /* Notify about leaving client if this channel has global users. */
2588 if (notify && channel->global_users)
2589 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2590 SILC_NOTIFY_TYPE_LEAVE, 1,
2591 clidp->data, clidp->len);
2593 server->stat.my_channels--;
2594 silc_buffer_free(clidp);
2597 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2599 if (channel->founder_key) {
2600 /* The founder auth data exists, do not remove the channel entry */
2601 SilcChannelClientEntry chl2;
2605 silc_list_start(channel->user_list);
2606 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2607 silc_list_del(chl2->client->channels, chl2);
2608 silc_list_del(channel->user_list, chl2);
2614 if (!silc_idlist_del_channel(server->local_list, channel))
2615 silc_idlist_del_channel(server->global_list, channel);
2619 /* Send notify to channel about client leaving the channel */
2621 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2622 SILC_NOTIFY_TYPE_LEAVE, 1,
2623 clidp->data, clidp->len);
2627 silc_buffer_free(clidp);
2631 /* Returns TRUE if the given client is on the channel. FALSE if not.
2632 This works because we assure that the user list on the channel is
2633 always in up to date thus we can only check the channel list from
2634 `client' which is faster than checking the user list from `channel'. */
2636 int silc_server_client_on_channel(SilcClientEntry client,
2637 SilcChannelEntry channel)
2639 SilcChannelClientEntry chl;
2641 if (!client || !channel)
2644 silc_list_start(client->channels);
2645 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2646 if (chl->channel == channel)
2652 /* Timeout callback. This is called if connection is idle or for some
2653 other reason is not responding within some period of time. This
2654 disconnects the remote end. */
2656 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2658 SilcServer server = (SilcServer)context;
2659 SilcSocketConnection sock = server->sockets[fd];
2664 if (sock->user_data)
2665 silc_server_free_sock_user_data(server, sock);
2667 silc_server_disconnect_remote(server, sock,
2668 "Server closed connection: "
2669 "Connection timeout");
2672 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2673 function may be used only by router. In real SILC network all channels
2674 are created by routers thus this function is never used by normal
2677 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2678 SilcServerID *router_id,
2684 SilcChannelID *channel_id;
2685 SilcChannelEntry entry;
2689 SILC_LOG_DEBUG(("Creating new channel"));
2692 cipher = "aes-256-cbc";
2694 hmac = "hmac-sha1-96";
2696 /* Allocate cipher */
2697 if (!silc_cipher_alloc(cipher, &key))
2701 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2702 silc_cipher_free(key);
2706 channel_name = strdup(channel_name);
2708 /* Create the channel */
2709 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2710 entry = silc_idlist_add_channel(server->local_list, channel_name,
2711 SILC_CHANNEL_MODE_NONE, channel_id,
2712 NULL, key, newhmac);
2714 silc_free(channel_name);
2718 entry->cipher = strdup(cipher);
2719 entry->hmac_name = strdup(hmac);
2721 /* Now create the actual key material */
2722 silc_server_create_channel_key(server, entry,
2723 silc_cipher_get_key_len(key) / 8);
2725 /* Notify other routers about the new channel. We send the packet
2726 to our primary route. */
2727 if (broadcast && server->standalone == FALSE)
2728 silc_server_send_new_channel(server, server->router->connection, TRUE,
2729 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2732 server->stat.my_channels++;
2737 /* Same as above but creates the channel with Channel ID `channel_id. */
2740 silc_server_create_new_channel_with_id(SilcServer server,
2744 SilcChannelID *channel_id,
2747 SilcChannelEntry entry;
2751 SILC_LOG_DEBUG(("Creating new channel"));
2754 cipher = "aes-256-cbc";
2756 hmac = "hmac-sha1-96";
2758 /* Allocate cipher */
2759 if (!silc_cipher_alloc(cipher, &key))
2763 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2764 silc_cipher_free(key);
2768 channel_name = strdup(channel_name);
2770 /* Create the channel */
2771 entry = silc_idlist_add_channel(server->local_list, channel_name,
2772 SILC_CHANNEL_MODE_NONE, channel_id,
2773 NULL, key, newhmac);
2775 silc_free(channel_name);
2779 /* Now create the actual key material */
2780 silc_server_create_channel_key(server, entry,
2781 silc_cipher_get_key_len(key) / 8);
2783 /* Notify other routers about the new channel. We send the packet
2784 to our primary route. */
2785 if (broadcast && server->standalone == FALSE)
2786 silc_server_send_new_channel(server, server->router->connection, TRUE,
2787 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2790 server->stat.my_channels++;
2795 /* Channel's key re-key timeout callback. */
2797 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2799 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2800 SilcServer server = (SilcServer)rekey->context;
2802 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2803 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2805 silc_task_register(server->timeout_queue, 0,
2806 silc_server_channel_key_rekey,
2807 (void *)rekey, 3600, 0,
2809 SILC_TASK_PRI_NORMAL);
2812 /* Generates new channel key. This is used to create the initial channel key
2813 but also to re-generate new key for channel. If `key_len' is provided
2814 it is the bytes of the key length. */
2816 void silc_server_create_channel_key(SilcServer server,
2817 SilcChannelEntry channel,
2821 unsigned char channel_key[32], hash[32];
2824 SILC_LOG_DEBUG(("Generating channel key"));
2826 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2827 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2831 if (!channel->channel_key)
2832 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2837 else if (channel->key_len)
2838 len = channel->key_len / 8;
2840 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2842 /* Create channel key */
2843 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2846 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2848 /* Remove old key if exists */
2850 memset(channel->key, 0, channel->key_len / 8);
2851 silc_free(channel->key);
2855 channel->key_len = len * 8;
2856 channel->key = silc_calloc(len, sizeof(*channel->key));
2857 memcpy(channel->key, channel_key, len);
2858 memset(channel_key, 0, sizeof(channel_key));
2860 /* Generate HMAC key from the channel key data and set it */
2862 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2863 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2864 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2865 memset(hash, 0, sizeof(hash));
2867 if (server->server_type == SILC_ROUTER) {
2868 if (!channel->rekey)
2869 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2870 channel->rekey->context = (void *)server;
2871 channel->rekey->channel = channel;
2872 channel->rekey->key_len = key_len;
2874 silc_task_unregister_by_callback(server->timeout_queue,
2875 silc_server_channel_key_rekey);
2876 silc_task_register(server->timeout_queue, 0,
2877 silc_server_channel_key_rekey,
2878 (void *)channel->rekey, 3600, 0,
2880 SILC_TASK_PRI_NORMAL);
2884 /* Saves the channel key found in the encoded `key_payload' buffer. This
2885 function is used when we receive Channel Key Payload and also when we're
2886 processing JOIN command reply. Returns entry to the channel. */
2888 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2889 SilcBuffer key_payload,
2890 SilcChannelEntry channel)
2892 SilcChannelKeyPayload payload = NULL;
2893 SilcChannelID *id = NULL;
2894 unsigned char *tmp, hash[32];
2898 SILC_LOG_DEBUG(("Start"));
2900 /* Decode channel key payload */
2901 payload = silc_channel_key_payload_parse(key_payload);
2903 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2908 /* Get the channel entry */
2911 /* Get channel ID */
2912 tmp = silc_channel_key_get_id(payload, &tmp_len);
2913 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2919 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2921 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2923 SILC_LOG_ERROR(("Received key for non-existent channel"));
2929 tmp = silc_channel_key_get_key(payload, &tmp_len);
2935 cipher = silc_channel_key_get_cipher(payload, NULL);
2941 /* Remove old key if exists */
2943 memset(channel->key, 0, channel->key_len / 8);
2944 silc_free(channel->key);
2945 silc_cipher_free(channel->channel_key);
2948 /* Create new cipher */
2949 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2954 if (channel->cipher)
2955 silc_free(channel->cipher);
2956 channel->cipher = strdup(cipher);
2959 channel->key_len = tmp_len * 8;
2960 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2961 memcpy(channel->key, tmp, tmp_len);
2962 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2964 /* Generate HMAC key from the channel key data and set it */
2966 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2967 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2968 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2970 memset(hash, 0, sizeof(hash));
2971 memset(tmp, 0, tmp_len);
2973 if (server->server_type == SILC_ROUTER) {
2974 if (!channel->rekey)
2975 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2976 channel->rekey->context = (void *)server;
2977 channel->rekey->channel = channel;
2979 silc_task_unregister_by_callback(server->timeout_queue,
2980 silc_server_channel_key_rekey);
2981 silc_task_register(server->timeout_queue, 0,
2982 silc_server_channel_key_rekey,
2983 (void *)channel->rekey, 3600, 0,
2985 SILC_TASK_PRI_NORMAL);
2992 silc_channel_key_payload_free(payload);
2997 /* Heartbeat callback. This function is set as argument for the
2998 silc_socket_set_heartbeat function. The library will call this function
2999 at the set time interval. */
3001 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3004 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3006 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3009 /* Send the heartbeat */
3010 silc_server_send_heartbeat(hb->server, sock);
3013 /* Returns assembled of all servers in the given ID list. The packet's
3014 form is dictated by the New ID payload. */
3016 static void silc_server_announce_get_servers(SilcServer server,
3018 SilcBuffer *servers)
3020 SilcIDCacheList list;
3021 SilcIDCacheEntry id_cache;
3022 SilcServerEntry entry;
3025 /* Go through all clients in the list */
3026 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3027 SILC_ID_SERVER, &list)) {
3028 if (silc_idcache_list_first(list, &id_cache)) {
3030 entry = (SilcServerEntry)id_cache->context;
3032 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3034 *servers = silc_buffer_realloc(*servers,
3036 (*servers)->truelen + idp->len :
3038 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3039 silc_buffer_put(*servers, idp->data, idp->len);
3040 silc_buffer_pull(*servers, idp->len);
3041 silc_buffer_free(idp);
3043 if (!silc_idcache_list_next(list, &id_cache))
3048 silc_idcache_list_free(list);
3052 /* This function is used by router to announce existing servers to our
3053 primary router when we've connected to it. */
3055 void silc_server_announce_servers(SilcServer server)
3057 SilcBuffer servers = NULL;
3059 SILC_LOG_DEBUG(("Announcing servers"));
3061 /* Get servers in local list */
3062 silc_server_announce_get_servers(server, server->local_list, &servers);
3064 /* Get servers in global list */
3065 silc_server_announce_get_servers(server, server->global_list, &servers);
3068 silc_buffer_push(servers, servers->data - servers->head);
3069 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3071 /* Send the packet */
3072 silc_server_packet_send(server, server->router->connection,
3073 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3074 servers->data, servers->len, TRUE);
3076 silc_buffer_free(servers);
3080 /* Returns assembled packet of all clients in the given ID list. The
3081 packet's form is dictated by the New ID Payload. */
3083 static void silc_server_announce_get_clients(SilcServer server,
3085 SilcBuffer *clients)
3087 SilcIDCacheList list;
3088 SilcIDCacheEntry id_cache;
3089 SilcClientEntry client;
3092 /* Go through all clients in the list */
3093 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3094 SILC_ID_CLIENT, &list)) {
3095 if (silc_idcache_list_first(list, &id_cache)) {
3097 client = (SilcClientEntry)id_cache->context;
3099 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3101 *clients = silc_buffer_realloc(*clients,
3103 (*clients)->truelen + idp->len :
3105 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3106 silc_buffer_put(*clients, idp->data, idp->len);
3107 silc_buffer_pull(*clients, idp->len);
3108 silc_buffer_free(idp);
3110 if (!silc_idcache_list_next(list, &id_cache))
3115 silc_idcache_list_free(list);
3119 /* This function is used to announce our existing clients to our router
3120 when we've connected to it. */
3122 void silc_server_announce_clients(SilcServer server)
3124 SilcBuffer clients = NULL;
3126 SILC_LOG_DEBUG(("Announcing clients"));
3128 /* Get clients in local list */
3129 silc_server_announce_get_clients(server, server->local_list,
3132 /* As router we announce our global list as well */
3133 if (server->server_type == SILC_ROUTER)
3134 silc_server_announce_get_clients(server, server->global_list,
3138 silc_buffer_push(clients, clients->data - clients->head);
3139 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3141 /* Send the packet */
3142 silc_server_packet_send(server, server->router->connection,
3143 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3144 clients->data, clients->len, TRUE);
3146 silc_buffer_free(clients);
3151 silc_server_announce_encode_join(uint32 argc, ...)
3156 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3159 /* Returns assembled packets for channel users of the `channel'. */
3161 void silc_server_announce_get_channel_users(SilcServer server,
3162 SilcChannelEntry channel,
3163 SilcBuffer *channel_users)
3165 SilcChannelClientEntry chl;
3166 SilcBuffer chidp, clidp;
3170 SILC_LOG_DEBUG(("Start"));
3172 /* Now find all users on the channel */
3173 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3174 silc_list_start(channel->user_list);
3175 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3176 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3177 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3178 chidp->data, chidp->len);
3181 silc_buffer_realloc(*channel_users,
3183 (*channel_users)->truelen + len : len));
3184 silc_buffer_pull_tail(*channel_users,
3185 ((*channel_users)->end -
3186 (*channel_users)->data));
3188 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3189 silc_buffer_pull(*channel_users, len);
3190 silc_buffer_free(clidp);
3191 silc_buffer_free(tmp);
3193 silc_buffer_free(chidp);
3196 /* Returns assembled packets for all channels and users on those channels
3197 from the given ID List. The packets are in the form dictated by the
3198 New Channel and New Channel User payloads. */
3200 void silc_server_announce_get_channels(SilcServer server,
3202 SilcBuffer *channels,
3203 SilcBuffer *channel_users)
3205 SilcIDCacheList list;
3206 SilcIDCacheEntry id_cache;
3207 SilcChannelEntry channel;
3212 SILC_LOG_DEBUG(("Start"));
3214 /* Go through all channels in the list */
3215 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3216 SILC_ID_CHANNEL, &list)) {
3217 if (silc_idcache_list_first(list, &id_cache)) {
3219 channel = (SilcChannelEntry)id_cache->context;
3221 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3222 name_len = strlen(channel->channel_name);
3224 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3226 silc_buffer_realloc(*channels,
3227 (*channels ? (*channels)->truelen + len : len));
3228 silc_buffer_pull_tail(*channels,
3229 ((*channels)->end - (*channels)->data));
3230 silc_buffer_format(*channels,
3231 SILC_STR_UI_SHORT(name_len),
3232 SILC_STR_UI_XNSTRING(channel->channel_name,
3234 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3235 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3236 SILC_STR_UI_INT(channel->mode),
3238 silc_buffer_pull(*channels, len);
3240 silc_server_announce_get_channel_users(server, channel,
3245 if (!silc_idcache_list_next(list, &id_cache))
3250 silc_idcache_list_free(list);
3254 /* This function is used to announce our existing channels to our router
3255 when we've connected to it. This also announces the users on the
3256 channels to the router. */
3258 void silc_server_announce_channels(SilcServer server)
3260 SilcBuffer channels = NULL, channel_users = NULL;
3262 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3264 /* Get channels and channel users in local list */
3265 silc_server_announce_get_channels(server, server->local_list,
3266 &channels, &channel_users);
3268 /* Get channels and channel users in global list */
3269 silc_server_announce_get_channels(server, server->global_list,
3270 &channels, &channel_users);
3273 silc_buffer_push(channels, channels->data - channels->head);
3274 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3276 /* Send the packet */
3277 silc_server_packet_send(server, server->router->connection,
3278 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3279 channels->data, channels->len,
3282 silc_buffer_free(channels);
3285 if (channel_users) {
3286 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3287 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3288 channel_users->len);
3290 /* Send the packet */
3291 silc_server_packet_send(server, server->router->connection,
3292 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3293 channel_users->data, channel_users->len,
3296 silc_buffer_free(channel_users);
3300 /* Failure timeout callback. If this is called then we will immediately
3301 process the received failure. We always process the failure with timeout
3302 since we do not want to blindly trust to received failure packets.
3303 This won't be called (the timeout is cancelled) if the failure was
3304 bogus (it is bogus if remote does not close the connection after sending
3307 SILC_TASK_CALLBACK(silc_server_failure_callback)
3309 SilcServerFailureContext f = (SilcServerFailureContext)context;
3311 if (f->sock->protocol) {
3312 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3313 f->sock->protocol->execute(f->server->timeout_queue, 0,
3314 f->sock->protocol, f->sock->sock, 0, 0);
3320 /* Assembles user list and users mode list from the `channel'. */
3322 void silc_server_get_users_on_channel(SilcServer server,
3323 SilcChannelEntry channel,
3324 SilcBuffer *user_list,
3325 SilcBuffer *mode_list,
3328 SilcChannelClientEntry chl;
3329 SilcBuffer client_id_list;
3330 SilcBuffer client_mode_list;
3332 uint32 list_count = 0;
3334 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3335 silc_list_count(channel->user_list));
3336 client_mode_list = silc_buffer_alloc(4 *
3337 silc_list_count(channel->user_list));
3338 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3339 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3340 silc_list_start(channel->user_list);
3341 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3343 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3344 silc_buffer_put(client_id_list, idp->data, idp->len);
3345 silc_buffer_pull(client_id_list, idp->len);
3346 silc_buffer_free(idp);
3348 /* Client's mode on channel */
3349 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3350 silc_buffer_pull(client_mode_list, 4);
3354 silc_buffer_push(client_id_list,
3355 client_id_list->data - client_id_list->head);
3356 silc_buffer_push(client_mode_list,
3357 client_mode_list->data - client_mode_list->head);
3359 *user_list = client_id_list;
3360 *mode_list = client_mode_list;
3361 *user_count = list_count;
3364 /* Saves users and their modes to the `channel'. */
3366 void silc_server_save_users_on_channel(SilcServer server,
3367 SilcSocketConnection sock,
3368 SilcChannelEntry channel,
3369 SilcClientID *noadd,
3370 SilcBuffer user_list,
3371 SilcBuffer mode_list,
3376 /* Cache the received Client ID's and modes. This cache expires
3377 whenever server sends notify message to channel. It means two things;
3378 some user has joined or leaved the channel. XXX TODO! */
3379 for (i = 0; i < user_count; i++) {
3382 SilcClientID *client_id;
3383 SilcClientEntry client;
3386 SILC_GET16_MSB(idp_len, user_list->data + 2);
3388 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3389 silc_buffer_pull(user_list, idp_len);
3394 SILC_GET32_MSB(mode, mode_list->data);
3395 silc_buffer_pull(mode_list, 4);
3397 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3398 silc_free(client_id);
3402 /* Check if we have this client cached already. */
3403 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3406 client = silc_idlist_find_client_by_id(server->global_list,
3409 /* If router did not find such Client ID in its lists then this must
3410 be bogus client or some router in the net is buggy. */
3411 if (server->server_type == SILC_ROUTER) {
3412 silc_free(client_id);
3416 /* We don't have that client anywhere, add it. The client is added
3417 to global list since server didn't have it in the lists so it must be
3419 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3421 silc_id_dup(client_id, SILC_ID_CLIENT),
3422 sock->user_data, NULL);
3424 silc_free(client_id);
3428 client->data.registered = TRUE;
3431 silc_free(client_id);
3433 if (!silc_server_client_on_channel(client, channel)) {
3434 /* Client was not on the channel, add it. */
3435 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3436 chl->client = client;
3438 chl->channel = channel;
3439 silc_list_add(channel->user_list, chl);
3440 silc_list_add(client->channels, chl);
3445 /* Lookups route to the client indicated by the `id_data'. The connection
3446 object and internal data object is returned. Returns NULL if route
3447 could not be found to the client. If the `client_id' is specified then
3448 it is used and the `id_data' is ignored. */
3450 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3451 unsigned char *id_data,
3453 SilcClientID *client_id,
3454 SilcIDListData *idata)
3457 SilcClientEntry client;
3459 SILC_LOG_DEBUG(("Start"));
3461 /* Decode destination Client ID */
3463 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3465 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3469 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3472 /* If the destination belongs to our server we don't have to route
3473 the packet anywhere but to send it to the local destination. */
3474 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3478 if (client && client->data.registered == FALSE)
3481 /* If we are router and the client has router then the client is in
3482 our cell but not directly connected to us. */
3483 if (server->server_type == SILC_ROUTER && client->router) {
3484 /* We are of course in this case the client's router thus the real
3485 "router" of the client is the server who owns the client. Thus
3486 we will send the packet to that server. */
3488 *idata = (SilcIDListData)client->router;
3489 return client->router->connection;
3492 /* Seems that client really is directly connected to us */
3494 *idata = (SilcIDListData)client;
3495 return client->connection;
3498 /* Destination belongs to someone not in this server. If we are normal
3499 server our action is to send the packet to our router. */
3500 if (server->server_type == SILC_SERVER && !server->standalone) {
3503 *idata = (SilcIDListData)server->router;
3504 return server->router->connection;
3507 /* We are router and we will perform route lookup for the destination
3508 and send the packet to fastest route. */
3509 if (server->server_type == SILC_ROUTER && !server->standalone) {
3510 /* Check first that the ID is valid */
3511 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3513 SilcSocketConnection dst_sock;
3515 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3519 *idata = (SilcIDListData)dst_sock->user_data;
3528 /* Encodes and returns channel list of channels the `client' has joined.
3529 Secret channels are not put to the list. */
3531 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3532 SilcClientEntry client)
3534 SilcBuffer buffer = NULL;
3535 SilcChannelEntry channel;
3536 SilcChannelClientEntry chl;
3541 silc_list_start(client->channels);
3542 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3543 channel = chl->channel;
3545 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3548 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3549 name_len = strlen(channel->channel_name);
3551 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3552 buffer = silc_buffer_realloc(buffer,
3553 (buffer ? (buffer)->truelen + len : len));
3554 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3555 silc_buffer_format(buffer,
3556 SILC_STR_UI_SHORT(name_len),
3557 SILC_STR_UI_XNSTRING(channel->channel_name,
3559 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3560 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3561 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3563 silc_buffer_pull(buffer, len);
3568 silc_buffer_push(buffer, buffer->data - buffer->head);
3573 /* Finds client entry by Client ID and if it is not found then resolves
3574 it using WHOIS command. */
3576 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3577 SilcClientID *client_id)
3579 SilcClientEntry client;
3581 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3583 client = silc_idlist_find_client_by_id(server->global_list,
3585 if (!client && server->server_type == SILC_ROUTER)
3589 if (!client && server->standalone)
3592 if (!client || !client->nickname || !client->username) {
3593 SilcBuffer buffer, idp;
3595 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3596 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3597 ++server->cmd_ident, 1,
3598 3, idp->data, idp->len);
3599 silc_server_packet_send(server, client ? client->router->connection :
3600 server->router->connection,
3601 SILC_PACKET_COMMAND, 0,
3602 buffer->data, buffer->len, FALSE);
3603 silc_buffer_free(idp);
3604 silc_buffer_free(buffer);
3610 /* A timeout callback for the re-key. We will be the initiator of the
3613 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3615 SilcSocketConnection sock = (SilcSocketConnection)context;
3616 SilcIDListData idata = (SilcIDListData)sock->user_data;
3617 SilcServer server = (SilcServer)idata->rekey->context;
3618 SilcProtocol protocol;
3619 SilcServerRekeyInternalContext *proto_ctx;
3621 SILC_LOG_DEBUG(("Start"));
3623 /* Allocate internal protocol context. This is sent as context
3625 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3626 proto_ctx->server = (void *)server;
3627 proto_ctx->sock = sock;
3628 proto_ctx->responder = FALSE;
3629 proto_ctx->pfs = idata->rekey->pfs;
3631 /* Perform rekey protocol. Will call the final callback after the
3632 protocol is over. */
3633 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3634 &protocol, proto_ctx, silc_server_rekey_final);
3635 sock->protocol = protocol;
3637 /* Run the protocol */
3638 protocol->execute(server->timeout_queue, 0, protocol,
3641 /* Re-register re-key timeout */
3642 silc_task_register(server->timeout_queue, sock->sock,
3643 silc_server_rekey_callback,
3644 context, idata->rekey->timeout, 0,
3645 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3648 /* The final callback for the REKEY protocol. This will actually take the
3649 new key material into use. */
3651 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3653 SilcProtocol protocol = (SilcProtocol)context;
3654 SilcServerRekeyInternalContext *ctx =
3655 (SilcServerRekeyInternalContext *)protocol->context;
3656 SilcServer server = (SilcServer)ctx->server;
3657 SilcSocketConnection sock = ctx->sock;
3659 SILC_LOG_DEBUG(("Start"));
3661 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3662 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3663 /* Error occured during protocol */
3664 silc_protocol_cancel(server->timeout_queue, protocol);
3665 silc_protocol_free(protocol);
3666 sock->protocol = NULL;
3668 silc_packet_context_free(ctx->packet);
3670 silc_ske_free(ctx->ske);
3676 /* Take the keys into use */
3677 if (ctx->pfs == TRUE)
3678 silc_server_protocol_rekey_generate_pfs(server, ctx);
3680 silc_server_protocol_rekey_generate(server, ctx);
3684 silc_protocol_free(protocol);
3685 sock->protocol = NULL;
3687 silc_packet_context_free(ctx->packet);
3689 silc_ske_free(ctx->ske);