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;
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;
1436 SILC_LOG_DEBUG(("Start"));
1438 /* Decrypt the received packet */
1439 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1440 packet->buffer, packet,
1441 silc_server_packet_decrypt_check, parse_ctx);
1446 /* Parse the packet. Packet type is returned. */
1447 ret = silc_packet_parse(packet);
1449 /* Parse the packet header in special way as this is "special"
1451 ret = silc_packet_parse_special(packet);
1454 if (ret == SILC_PACKET_NONE)
1457 /* Check that the the current client ID is same as in the client's packet. */
1458 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1459 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1460 if (client && client->id) {
1461 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1462 packet->src_id_type);
1463 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1471 if (server->server_type == SILC_ROUTER) {
1472 /* Route the packet if it is not destined to us. Other ID types but
1473 server are handled separately after processing them. */
1474 if (packet->dst_id_type == SILC_ID_SERVER &&
1475 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1476 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1478 /* Route the packet to fastest route for the destination ID */
1479 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1480 packet->dst_id_type);
1483 silc_server_packet_route(server,
1484 silc_server_route_get(server, id,
1485 packet->dst_id_type),
1491 /* Broadcast packet if it is marked as broadcast packet and it is
1492 originated from router and we are router. */
1493 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1494 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1495 silc_server_packet_broadcast(server, server->router->connection, packet);
1499 /* Parse the incoming packet type */
1500 silc_server_packet_parse_type(server, sock, packet);
1503 /* silc_buffer_clear(sock->inbuf); */
1504 silc_packet_context_free(packet);
1505 silc_free(parse_ctx);
1508 /* Parser callback called by silc_packet_receive_process. This merely
1509 registers timeout that will handle the actual parsing when appropriate. */
1511 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1513 SilcServer server = (SilcServer)parser_context->context;
1514 SilcSocketConnection sock = parser_context->sock;
1516 switch (sock->type) {
1517 case SILC_SOCKET_TYPE_UNKNOWN:
1518 /* Parse the packet with timeout */
1519 silc_task_register(server->timeout_queue, sock->sock,
1520 silc_server_packet_parse_real,
1521 (void *)parser_context, 0, 100000,
1523 SILC_TASK_PRI_NORMAL);
1525 case SILC_SOCKET_TYPE_CLIENT:
1526 /* Parse the packet with timeout (unless protocol is active) */
1527 silc_task_register(server->timeout_queue, sock->sock,
1528 silc_server_packet_parse_real,
1529 (void *)parser_context, 0,
1530 (sock->protocol ? 1 : 100000),
1532 SILC_TASK_PRI_NORMAL);
1534 case SILC_SOCKET_TYPE_SERVER:
1535 case SILC_SOCKET_TYPE_ROUTER:
1536 /* Packets from servers are parsed as soon as possible */
1537 silc_task_register(server->timeout_queue, sock->sock,
1538 silc_server_packet_parse_real,
1539 (void *)parser_context, 0, 1,
1541 SILC_TASK_PRI_NORMAL);
1548 /* Parses the packet type and calls what ever routines the packet type
1549 requires. This is done for all incoming packets. */
1551 void silc_server_packet_parse_type(SilcServer server,
1552 SilcSocketConnection sock,
1553 SilcPacketContext *packet)
1555 SilcPacketType type = packet->type;
1557 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1559 /* Parse the packet type */
1561 case SILC_PACKET_DISCONNECT:
1562 SILC_LOG_DEBUG(("Disconnect packet"));
1563 if (packet->flags & SILC_PACKET_FLAG_LIST)
1567 case SILC_PACKET_SUCCESS:
1569 * Success received for something. For now we can have only
1570 * one protocol for connection executing at once hence this
1571 * success message is for whatever protocol is executing currently.
1573 SILC_LOG_DEBUG(("Success packet"));
1574 if (packet->flags & SILC_PACKET_FLAG_LIST)
1576 if (sock->protocol) {
1577 sock->protocol->execute(server->timeout_queue, 0,
1578 sock->protocol, sock->sock, 0, 0);
1582 case SILC_PACKET_FAILURE:
1584 * Failure received for something. For now we can have only
1585 * one protocol for connection executing at once hence this
1586 * failure message is for whatever protocol is executing currently.
1588 SILC_LOG_DEBUG(("Failure packet"));
1589 if (packet->flags & SILC_PACKET_FLAG_LIST)
1591 if (sock->protocol) {
1592 SilcServerFailureContext f;
1593 f = silc_calloc(1, sizeof(*f));
1597 /* We will wait 5 seconds to process this failure packet */
1598 silc_task_register(server->timeout_queue, sock->sock,
1599 silc_server_failure_callback, (void *)f, 5, 0,
1600 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1604 case SILC_PACKET_REJECT:
1605 SILC_LOG_DEBUG(("Reject packet"));
1606 if (packet->flags & SILC_PACKET_FLAG_LIST)
1611 case SILC_PACKET_NOTIFY:
1613 * Received notify packet. Server can receive notify packets from
1614 * router. Server then relays the notify messages to clients if needed.
1616 SILC_LOG_DEBUG(("Notify packet"));
1617 if (packet->flags & SILC_PACKET_FLAG_LIST)
1618 silc_server_notify_list(server, sock, packet);
1620 silc_server_notify(server, sock, packet);
1626 case SILC_PACKET_CHANNEL_MESSAGE:
1628 * Received channel message. Channel messages are special packets
1629 * (although probably most common ones) thus they are handled
1632 SILC_LOG_DEBUG(("Channel Message packet"));
1633 if (packet->flags & SILC_PACKET_FLAG_LIST)
1635 silc_server_channel_message(server, sock, packet);
1638 case SILC_PACKET_CHANNEL_KEY:
1640 * Received key for channel. As channels are created by the router
1641 * the keys are as well. We will distribute the key to all of our
1642 * locally connected clients on the particular channel. Router
1643 * never receives this channel and thus is ignored.
1645 SILC_LOG_DEBUG(("Channel Key packet"));
1646 if (packet->flags & SILC_PACKET_FLAG_LIST)
1648 silc_server_channel_key(server, sock, packet);
1654 case SILC_PACKET_COMMAND:
1656 * Recived command. Processes the command request and allocates the
1657 * command context and calls the command.
1659 SILC_LOG_DEBUG(("Command packet"));
1660 if (packet->flags & SILC_PACKET_FLAG_LIST)
1662 silc_server_command_process(server, sock, packet);
1665 case SILC_PACKET_COMMAND_REPLY:
1667 * Received command reply packet. Received command reply to command. It
1668 * may be reply to command sent by us or reply to command sent by client
1669 * that we've routed further.
1671 SILC_LOG_DEBUG(("Command Reply packet"));
1672 if (packet->flags & SILC_PACKET_FLAG_LIST)
1674 silc_server_command_reply(server, sock, packet);
1678 * Private Message packets
1680 case SILC_PACKET_PRIVATE_MESSAGE:
1682 * Received private message packet. The packet is coming from either
1685 SILC_LOG_DEBUG(("Private Message packet"));
1686 if (packet->flags & SILC_PACKET_FLAG_LIST)
1688 silc_server_private_message(server, sock, packet);
1691 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1693 * Private message key packet.
1695 if (packet->flags & SILC_PACKET_FLAG_LIST)
1697 silc_server_private_message_key(server, sock, packet);
1701 * Key Exchange protocol packets
1703 case SILC_PACKET_KEY_EXCHANGE:
1704 SILC_LOG_DEBUG(("KE packet"));
1705 if (packet->flags & SILC_PACKET_FLAG_LIST)
1708 if (sock->protocol && sock->protocol->protocol &&
1709 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1711 SilcServerKEInternalContext *proto_ctx =
1712 (SilcServerKEInternalContext *)sock->protocol->context;
1714 proto_ctx->packet = silc_packet_context_dup(packet);
1716 /* Let the protocol handle the packet */
1717 sock->protocol->execute(server->timeout_queue, 0,
1718 sock->protocol, sock->sock, 0, 100000);
1720 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1721 "protocol active, packet dropped."));
1723 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1727 case SILC_PACKET_KEY_EXCHANGE_1:
1728 SILC_LOG_DEBUG(("KE 1 packet"));
1729 if (packet->flags & SILC_PACKET_FLAG_LIST)
1732 if (sock->protocol && sock->protocol->protocol &&
1733 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1734 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1736 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1737 SilcServerRekeyInternalContext *proto_ctx =
1738 (SilcServerRekeyInternalContext *)sock->protocol->context;
1740 if (proto_ctx->packet)
1741 silc_packet_context_free(proto_ctx->packet);
1743 proto_ctx->packet = silc_packet_context_dup(packet);
1745 /* Let the protocol handle the packet */
1746 sock->protocol->execute(server->timeout_queue, 0,
1747 sock->protocol, sock->sock, 0, 0);
1749 SilcServerKEInternalContext *proto_ctx =
1750 (SilcServerKEInternalContext *)sock->protocol->context;
1752 if (proto_ctx->packet)
1753 silc_packet_context_free(proto_ctx->packet);
1755 proto_ctx->packet = silc_packet_context_dup(packet);
1756 proto_ctx->dest_id_type = packet->src_id_type;
1757 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1758 packet->src_id_type);
1759 if (!proto_ctx->dest_id)
1762 /* Let the protocol handle the packet */
1763 sock->protocol->execute(server->timeout_queue, 0,
1764 sock->protocol, sock->sock,
1768 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1769 "protocol active, packet dropped."));
1773 case SILC_PACKET_KEY_EXCHANGE_2:
1774 SILC_LOG_DEBUG(("KE 2 packet"));
1775 if (packet->flags & SILC_PACKET_FLAG_LIST)
1778 if (sock->protocol && sock->protocol->protocol &&
1779 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1780 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1782 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1783 SilcServerRekeyInternalContext *proto_ctx =
1784 (SilcServerRekeyInternalContext *)sock->protocol->context;
1786 if (proto_ctx->packet)
1787 silc_packet_context_free(proto_ctx->packet);
1789 proto_ctx->packet = silc_packet_context_dup(packet);
1791 /* Let the protocol handle the packet */
1792 sock->protocol->execute(server->timeout_queue, 0,
1793 sock->protocol, sock->sock, 0, 0);
1795 SilcServerKEInternalContext *proto_ctx =
1796 (SilcServerKEInternalContext *)sock->protocol->context;
1798 if (proto_ctx->packet)
1799 silc_packet_context_free(proto_ctx->packet);
1801 proto_ctx->packet = silc_packet_context_dup(packet);
1802 proto_ctx->dest_id_type = packet->src_id_type;
1803 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1804 packet->src_id_type);
1805 if (!proto_ctx->dest_id)
1808 /* Let the protocol handle the packet */
1809 sock->protocol->execute(server->timeout_queue, 0,
1810 sock->protocol, sock->sock,
1814 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1815 "protocol active, packet dropped."));
1819 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1821 * Connection authentication request packet. When we receive this packet
1822 * we will send to the other end information about our mandatory
1823 * authentication method for the connection. This packet maybe received
1826 SILC_LOG_DEBUG(("Connection authentication request packet"));
1827 if (packet->flags & SILC_PACKET_FLAG_LIST)
1829 silc_server_connection_auth_request(server, sock, packet);
1833 * Connection Authentication protocol packets
1835 case SILC_PACKET_CONNECTION_AUTH:
1836 /* Start of the authentication protocol. We receive here the
1837 authentication data and will verify it. */
1838 SILC_LOG_DEBUG(("Connection auth packet"));
1839 if (packet->flags & SILC_PACKET_FLAG_LIST)
1842 if (sock->protocol && sock->protocol->protocol->type
1843 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1845 SilcServerConnAuthInternalContext *proto_ctx =
1846 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1848 proto_ctx->packet = silc_packet_context_dup(packet);
1850 /* Let the protocol handle the packet */
1851 sock->protocol->execute(server->timeout_queue, 0,
1852 sock->protocol, sock->sock, 0, 0);
1854 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1855 "protocol active, packet dropped."));
1859 case SILC_PACKET_NEW_ID:
1861 * Received New ID packet. This includes some new ID that has been
1862 * created. It may be for client, server or channel. This is the way
1863 * to distribute information about new registered entities in the
1866 SILC_LOG_DEBUG(("New ID packet"));
1867 if (packet->flags & SILC_PACKET_FLAG_LIST)
1868 silc_server_new_id_list(server, sock, packet);
1870 silc_server_new_id(server, sock, packet);
1873 case SILC_PACKET_NEW_CLIENT:
1875 * Received new client packet. This includes client information that
1876 * we will use to create initial client ID. After creating new
1877 * ID we will send it to the client.
1879 SILC_LOG_DEBUG(("New Client packet"));
1880 if (packet->flags & SILC_PACKET_FLAG_LIST)
1882 silc_server_new_client(server, sock, packet);
1885 case SILC_PACKET_NEW_SERVER:
1887 * Received new server packet. This includes Server ID and some other
1888 * information that we may save. This is received after server has
1891 SILC_LOG_DEBUG(("New Server packet"));
1892 if (packet->flags & SILC_PACKET_FLAG_LIST)
1894 silc_server_new_server(server, sock, packet);
1897 case SILC_PACKET_NEW_CHANNEL:
1899 * Received new channel packet. Information about new channel in the
1900 * network are distributed using this packet.
1902 SILC_LOG_DEBUG(("New Channel packet"));
1903 if (packet->flags & SILC_PACKET_FLAG_LIST)
1904 silc_server_new_channel_list(server, sock, packet);
1906 silc_server_new_channel(server, sock, packet);
1909 case SILC_PACKET_HEARTBEAT:
1911 * Received heartbeat.
1913 SILC_LOG_DEBUG(("Heartbeat packet"));
1914 if (packet->flags & SILC_PACKET_FLAG_LIST)
1918 case SILC_PACKET_KEY_AGREEMENT:
1920 * Received heartbeat.
1922 SILC_LOG_DEBUG(("Key agreement packet"));
1923 if (packet->flags & SILC_PACKET_FLAG_LIST)
1925 silc_server_key_agreement(server, sock, packet);
1928 case SILC_PACKET_REKEY:
1930 * Received re-key packet. The sender wants to regenerate the session
1933 SILC_LOG_DEBUG(("Re-key packet"));
1934 if (packet->flags & SILC_PACKET_FLAG_LIST)
1936 silc_server_rekey(server, sock, packet);
1939 case SILC_PACKET_REKEY_DONE:
1941 * The re-key is done.
1943 SILC_LOG_DEBUG(("Re-key done packet"));
1944 if (packet->flags & SILC_PACKET_FLAG_LIST)
1947 if (sock->protocol && sock->protocol->protocol &&
1948 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1950 SilcServerRekeyInternalContext *proto_ctx =
1951 (SilcServerRekeyInternalContext *)sock->protocol->context;
1953 if (proto_ctx->packet)
1954 silc_packet_context_free(proto_ctx->packet);
1956 proto_ctx->packet = silc_packet_context_dup(packet);
1958 /* Let the protocol handle the packet */
1959 sock->protocol->execute(server->timeout_queue, 0,
1960 sock->protocol, sock->sock,
1963 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1964 "protocol active, packet dropped."));
1969 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1975 /* Creates connection to a remote router. */
1977 void silc_server_create_connection(SilcServer server,
1978 char *remote_host, uint32 port)
1980 SilcServerConnection sconn;
1982 /* Allocate connection object for hold connection specific stuff. */
1983 sconn = silc_calloc(1, sizeof(*sconn));
1984 sconn->server = server;
1985 sconn->remote_host = strdup(remote_host);
1986 sconn->remote_port = port;
1988 silc_task_register(server->timeout_queue, 0,
1989 silc_server_connect_router,
1990 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1991 SILC_TASK_PRI_NORMAL);
1994 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1996 silc_socket_free((SilcSocketConnection)context);
1999 /* Closes connection to socket connection */
2001 void silc_server_close_connection(SilcServer server,
2002 SilcSocketConnection sock)
2004 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2006 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2007 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2008 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2009 "Router"), sock->sock));
2011 /* We won't listen for this connection anymore */
2012 silc_schedule_unset_listen_fd(sock->sock);
2014 /* Unregister all tasks */
2015 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2016 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2018 /* Close the actual connection */
2019 silc_net_close_connection(sock->sock);
2020 server->sockets[sock->sock] = NULL;
2022 silc_task_register(server->timeout_queue, 0,
2023 silc_server_close_connection_final,
2024 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2025 SILC_TASK_PRI_NORMAL);
2028 /* Sends disconnect message to remote connection and disconnects the
2031 void silc_server_disconnect_remote(SilcServer server,
2032 SilcSocketConnection sock,
2033 const char *fmt, ...)
2036 unsigned char buf[4096];
2041 memset(buf, 0, sizeof(buf));
2043 vsprintf(buf, fmt, ap);
2046 SILC_LOG_DEBUG(("Disconnecting remote host"));
2048 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2050 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2051 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2052 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2055 /* Notify remote end that the conversation is over. The notify message
2056 is tried to be sent immediately. */
2057 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2058 buf, strlen(buf), TRUE);
2060 /* Mark the connection to be disconnected */
2061 SILC_SET_DISCONNECTED(sock);
2062 silc_server_close_connection(server, sock);
2067 SilcClientEntry client;
2068 } *FreeClientInternal;
2070 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2072 FreeClientInternal i = (FreeClientInternal)context;
2074 silc_idlist_del_data(i->client);
2075 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2079 /* Frees client data and notifies about client's signoff. */
2081 void silc_server_free_client_data(SilcServer server,
2082 SilcSocketConnection sock,
2083 SilcClientEntry client,
2087 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2089 /* If there is pending outgoing data for the client then purge it
2090 to the network before removing the client entry. */
2091 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2092 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2093 server->stat.packets_sent++;
2095 if (sock->outbuf->data - sock->outbuf->head)
2096 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2098 silc_server_packet_send_real(server, sock, TRUE);
2100 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2101 SILC_UNSET_OUTBUF_PENDING(sock);
2102 silc_buffer_clear(sock->outbuf);
2105 /* Send SIGNOFF notify to routers. */
2106 if (notify && !server->standalone && server->router)
2107 silc_server_send_notify_signoff(server, server->router->connection,
2108 server->server_type == SILC_SERVER ?
2109 FALSE : TRUE, client->id,
2110 SILC_ID_CLIENT_LEN, signoff);
2112 /* Remove client from all channels */
2114 silc_server_remove_from_channels(server, NULL, client,
2115 TRUE, signoff, TRUE);
2117 silc_server_remove_from_channels(server, NULL, client,
2118 FALSE, NULL, FALSE);
2120 /* We will not delete the client entry right away. We will take it
2121 into history (for WHOWAS command) for 5 minutes */
2124 silc_task_register(server->timeout_queue, 0,
2125 silc_server_free_client_data_timeout,
2127 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2128 client->data.registered = FALSE;
2130 /* Free the client entry and everything in it */
2131 server->stat.my_clients--;
2132 server->stat.clients--;
2133 if (server->server_type == SILC_ROUTER)
2134 server->stat.cell_clients--;
2137 /* Frees user_data pointer from socket connection object. This also sends
2138 appropriate notify packets to the network to inform about leaving
2141 void silc_server_free_sock_user_data(SilcServer server,
2142 SilcSocketConnection sock)
2144 SILC_LOG_DEBUG(("Start"));
2146 switch(sock->type) {
2147 case SILC_SOCKET_TYPE_CLIENT:
2149 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2150 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2153 case SILC_SOCKET_TYPE_SERVER:
2154 case SILC_SOCKET_TYPE_ROUTER:
2156 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2158 /* Free all client entries that this server owns as they will
2159 become invalid now as well. */
2160 silc_server_remove_clients_by_server(server, user_data, TRUE);
2162 /* If this was our primary router connection then we're lost to
2163 the outside world. */
2164 if (server->router == user_data) {
2165 server->id_entry->router = NULL;
2166 server->router = NULL;
2167 server->standalone = TRUE;
2170 /* Free the server entry */
2171 silc_idlist_del_data(user_data);
2172 silc_idlist_del_server(server->local_list, user_data);
2173 server->stat.my_servers--;
2174 server->stat.servers--;
2175 if (server->server_type == SILC_ROUTER)
2176 server->stat.cell_servers--;
2181 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2183 silc_idlist_del_data(user_data);
2184 silc_free(user_data);
2189 sock->user_data = NULL;
2192 /* This function is used to remove all client entries by the server `entry'.
2193 This is called when the connection is lost to the server. In this case
2194 we must invalidate all the client entries owned by the server `entry'.
2195 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2196 distributed to our local clients. */
2198 int silc_server_remove_clients_by_server(SilcServer server,
2199 SilcServerEntry entry,
2202 SilcIDCacheList list = NULL;
2203 SilcIDCacheEntry id_cache = NULL;
2204 SilcClientEntry client = NULL;
2206 SilcClientEntry *clients = NULL;
2207 uint32 clients_c = 0;
2208 unsigned char **argv = NULL;
2209 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2212 SILC_LOG_DEBUG(("Start"));
2214 if (server_signoff) {
2215 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2216 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2217 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2218 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2219 argv[argc] = idp->data;
2220 argv_lens[argc] = idp->len;
2221 argv_types[argc] = argc + 1;
2223 silc_buffer_free(idp);
2226 if (silc_idcache_find_by_id(server->local_list->clients,
2227 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2229 if (silc_idcache_list_first(list, &id_cache)) {
2231 client = (SilcClientEntry)id_cache->context;
2232 if (client->data.registered == FALSE) {
2233 if (!silc_idcache_list_next(list, &id_cache))
2239 if (client->router != entry) {
2240 if (server_signoff && client->connection) {
2241 clients = silc_realloc(clients,
2242 sizeof(*clients) * (clients_c + 1));
2243 clients[clients_c] = client;
2247 if (!silc_idcache_list_next(list, &id_cache))
2253 if (server_signoff) {
2254 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2255 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2256 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2258 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2260 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2261 memcpy(argv[argc], idp->data, idp->len);
2262 argv_lens[argc] = idp->len;
2263 argv_types[argc] = argc + 1;
2265 silc_buffer_free(idp);
2268 /* Remove the client entry */
2269 silc_server_remove_from_channels(server, NULL, client, FALSE,
2271 silc_idlist_del_client(server->local_list, client);
2273 if (!silc_idcache_list_next(list, &id_cache))
2277 silc_idcache_list_free(list);
2280 if (silc_idcache_find_by_id(server->global_list->clients,
2281 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2283 if (silc_idcache_list_first(list, &id_cache)) {
2285 client = (SilcClientEntry)id_cache->context;
2286 if (client->data.registered == FALSE) {
2287 if (!silc_idcache_list_next(list, &id_cache))
2293 if (client->router != entry) {
2294 if (server_signoff && client->connection) {
2295 clients = silc_realloc(clients,
2296 sizeof(*clients) * (clients_c + 1));
2297 clients[clients_c] = client;
2301 if (!silc_idcache_list_next(list, &id_cache))
2307 if (server_signoff) {
2308 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2309 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2310 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2312 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2314 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2315 memcpy(argv[argc], idp->data, idp->len);
2316 argv_lens[argc] = idp->len;
2317 argv_types[argc] = argc + 1;
2319 silc_buffer_free(idp);
2322 /* Remove the client entry */
2323 silc_server_remove_from_channels(server, NULL, client, FALSE,
2325 silc_idlist_del_client(server->global_list, client);
2327 if (!silc_idcache_list_next(list, &id_cache))
2331 silc_idcache_list_free(list);
2334 /* Send the SERVER_SIGNOFF notify */
2335 if (server_signoff) {
2338 /* Send SERVER_SIGNOFF notify to our primary router */
2339 if (!server->standalone && server->router) {
2340 args = silc_argument_payload_encode(1, argv, argv_lens,
2342 silc_server_send_notify_args(server,
2343 server->router->connection,
2344 server->server_type ==
2345 SILC_SERVER ? FALSE : TRUE,
2346 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2348 silc_buffer_free(args);
2351 args = silc_argument_payload_encode(argc, argv, argv_lens,
2353 /* Send to local clients */
2354 for (i = 0; i < clients_c; i++) {
2355 silc_server_send_notify_args(server, clients[i]->connection,
2356 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2361 silc_buffer_free(args);
2363 silc_free(argv_lens);
2364 silc_free(argv_types);
2370 /* Checks whether given channel has global users. If it does this returns
2371 TRUE and FALSE if there is only locally connected clients on the channel. */
2373 int silc_server_channel_has_global(SilcChannelEntry channel)
2375 SilcChannelClientEntry chl;
2377 silc_list_start(channel->user_list);
2378 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2379 if (chl->client->router)
2386 /* Checks whether given channel has locally connected users. If it does this
2387 returns TRUE and FALSE if there is not one locally connected client. */
2389 int silc_server_channel_has_local(SilcChannelEntry channel)
2391 SilcChannelClientEntry chl;
2393 silc_list_start(channel->user_list);
2394 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2395 if (!chl->client->router)
2402 /* Removes client from all channels it has joined. This is used when client
2403 connection is disconnected. If the client on a channel is last, the
2404 channel is removed as well. This sends the SIGNOFF notify types. */
2406 void silc_server_remove_from_channels(SilcServer server,
2407 SilcSocketConnection sock,
2408 SilcClientEntry client,
2410 char *signoff_message,
2413 SilcChannelEntry channel;
2414 SilcChannelClientEntry chl;
2417 SILC_LOG_DEBUG(("Start"));
2419 if (!client || !client->id)
2422 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2424 /* Remove the client from all channels. The client is removed from
2425 the channels' user list. */
2426 silc_list_start(client->channels);
2427 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2428 channel = chl->channel;
2430 /* Remove channel from client's channel list */
2431 silc_list_del(client->channels, chl);
2433 /* Remove channel if there is no users anymore */
2434 if (server->server_type == SILC_ROUTER &&
2435 silc_list_count(channel->user_list) < 2) {
2436 server->stat.my_channels--;
2439 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2441 if (channel->founder_key) {
2442 /* The founder auth data exists, do not remove the channel entry */
2443 SilcChannelClientEntry chl2;
2447 silc_list_start(channel->user_list);
2448 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2449 silc_list_del(chl2->client->channels, chl2);
2450 silc_list_del(channel->user_list, chl2);
2456 if (!silc_idlist_del_channel(server->local_list, channel))
2457 silc_idlist_del_channel(server->global_list, channel);
2461 /* Remove client from channel's client list */
2462 silc_list_del(channel->user_list, chl);
2464 server->stat.my_chanclients--;
2466 /* If there is no global users on the channel anymore mark the channel
2467 as local channel. */
2468 if (server->server_type == SILC_SERVER &&
2469 !silc_server_channel_has_global(channel))
2470 channel->global_users = FALSE;
2472 /* If there is not at least one local user on the channel then we don't
2473 need the channel entry anymore, we can remove it safely. */
2474 if (server->server_type == SILC_SERVER &&
2475 !silc_server_channel_has_local(channel)) {
2476 /* Notify about leaving client if this channel has global users. */
2477 if (notify && channel->global_users)
2478 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2479 SILC_NOTIFY_TYPE_SIGNOFF,
2480 signoff_message ? 2 : 1,
2481 clidp->data, clidp->len,
2482 signoff_message, signoff_message ?
2483 strlen(signoff_message) : 0);
2485 server->stat.my_channels--;
2488 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2490 if (channel->founder_key) {
2491 /* The founder auth data exists, do not remove the channel entry */
2492 SilcChannelClientEntry chl2;
2496 silc_list_start(channel->user_list);
2497 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2498 silc_list_del(chl2->client->channels, chl2);
2499 silc_list_del(channel->user_list, chl2);
2505 if (!silc_idlist_del_channel(server->local_list, channel))
2506 silc_idlist_del_channel(server->global_list, channel);
2510 /* Send notify to channel about client leaving SILC and thus
2511 the entire channel. */
2513 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2514 SILC_NOTIFY_TYPE_SIGNOFF,
2515 signoff_message ? 2 : 1,
2516 clidp->data, clidp->len,
2517 signoff_message, signoff_message ?
2518 strlen(signoff_message) : 0);
2520 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2521 /* Re-generate channel key */
2522 silc_server_create_channel_key(server, channel, 0);
2524 /* Send the channel key to the channel. The key of course is not sent
2525 to the client who was removed from the channel. */
2526 silc_server_send_channel_key(server, client->connection, channel,
2527 server->server_type == SILC_ROUTER ?
2528 FALSE : !server->standalone);
2532 silc_buffer_free(clidp);
2535 /* Removes client from one channel. This is used for example when client
2536 calls LEAVE command to remove itself from the channel. Returns TRUE
2537 if channel still exists and FALSE if the channel is removed when
2538 last client leaves the channel. If `notify' is FALSE notify messages
2541 int silc_server_remove_from_one_channel(SilcServer server,
2542 SilcSocketConnection sock,
2543 SilcChannelEntry channel,
2544 SilcClientEntry client,
2547 SilcChannelEntry ch;
2548 SilcChannelClientEntry chl;
2551 SILC_LOG_DEBUG(("Start"));
2553 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2555 /* Remove the client from the channel. The client is removed from
2556 the channel's user list. */
2557 silc_list_start(client->channels);
2558 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2559 if (chl->channel != channel)
2564 /* Remove channel from client's channel list */
2565 silc_list_del(client->channels, chl);
2567 /* Remove channel if there is no users anymore */
2568 if (server->server_type == SILC_ROUTER &&
2569 silc_list_count(channel->user_list) < 2) {
2571 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2572 if (!silc_idlist_del_channel(server->local_list, channel))
2573 silc_idlist_del_channel(server->global_list, channel);
2574 silc_buffer_free(clidp);
2575 server->stat.my_channels--;
2579 /* Remove client from channel's client list */
2580 silc_list_del(channel->user_list, chl);
2582 server->stat.my_chanclients--;
2584 /* If there is no global users on the channel anymore mark the channel
2585 as local channel. */
2586 if (server->server_type == SILC_SERVER &&
2587 !silc_server_channel_has_global(channel))
2588 channel->global_users = FALSE;
2590 /* If there is not at least one local user on the channel then we don't
2591 need the channel entry anymore, we can remove it safely. */
2592 if (server->server_type == SILC_SERVER &&
2593 !silc_server_channel_has_local(channel)) {
2594 /* Notify about leaving client if this channel has global users. */
2595 if (notify && channel->global_users)
2596 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2597 SILC_NOTIFY_TYPE_LEAVE, 1,
2598 clidp->data, clidp->len);
2600 server->stat.my_channels--;
2601 silc_buffer_free(clidp);
2604 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2606 if (channel->founder_key) {
2607 /* The founder auth data exists, do not remove the channel entry */
2608 SilcChannelClientEntry chl2;
2612 silc_list_start(channel->user_list);
2613 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2614 silc_list_del(chl2->client->channels, chl2);
2615 silc_list_del(channel->user_list, chl2);
2621 if (!silc_idlist_del_channel(server->local_list, channel))
2622 silc_idlist_del_channel(server->global_list, channel);
2626 /* Send notify to channel about client leaving the channel */
2628 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2629 SILC_NOTIFY_TYPE_LEAVE, 1,
2630 clidp->data, clidp->len);
2634 silc_buffer_free(clidp);
2638 /* Returns TRUE if the given client is on the channel. FALSE if not.
2639 This works because we assure that the user list on the channel is
2640 always in up to date thus we can only check the channel list from
2641 `client' which is faster than checking the user list from `channel'. */
2643 int silc_server_client_on_channel(SilcClientEntry client,
2644 SilcChannelEntry channel)
2646 SilcChannelClientEntry chl;
2648 if (!client || !channel)
2651 silc_list_start(client->channels);
2652 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2653 if (chl->channel == channel)
2659 /* Timeout callback. This is called if connection is idle or for some
2660 other reason is not responding within some period of time. This
2661 disconnects the remote end. */
2663 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2665 SilcServer server = (SilcServer)context;
2666 SilcSocketConnection sock = server->sockets[fd];
2671 if (sock->user_data)
2672 silc_server_free_sock_user_data(server, sock);
2674 silc_server_disconnect_remote(server, sock,
2675 "Server closed connection: "
2676 "Connection timeout");
2679 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2680 function may be used only by router. In real SILC network all channels
2681 are created by routers thus this function is never used by normal
2684 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2685 SilcServerID *router_id,
2691 SilcChannelID *channel_id;
2692 SilcChannelEntry entry;
2696 SILC_LOG_DEBUG(("Creating new channel"));
2699 cipher = "aes-256-cbc";
2701 hmac = "hmac-sha1-96";
2703 /* Allocate cipher */
2704 if (!silc_cipher_alloc(cipher, &key))
2708 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2709 silc_cipher_free(key);
2713 channel_name = strdup(channel_name);
2715 /* Create the channel */
2716 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2717 entry = silc_idlist_add_channel(server->local_list, channel_name,
2718 SILC_CHANNEL_MODE_NONE, channel_id,
2719 NULL, key, newhmac);
2721 silc_free(channel_name);
2725 entry->cipher = strdup(cipher);
2726 entry->hmac_name = strdup(hmac);
2728 /* Now create the actual key material */
2729 silc_server_create_channel_key(server, entry,
2730 silc_cipher_get_key_len(key) / 8);
2732 /* Notify other routers about the new channel. We send the packet
2733 to our primary route. */
2734 if (broadcast && server->standalone == FALSE)
2735 silc_server_send_new_channel(server, server->router->connection, TRUE,
2736 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2739 server->stat.my_channels++;
2744 /* Same as above but creates the channel with Channel ID `channel_id. */
2747 silc_server_create_new_channel_with_id(SilcServer server,
2751 SilcChannelID *channel_id,
2754 SilcChannelEntry entry;
2758 SILC_LOG_DEBUG(("Creating new channel"));
2761 cipher = "aes-256-cbc";
2763 hmac = "hmac-sha1-96";
2765 /* Allocate cipher */
2766 if (!silc_cipher_alloc(cipher, &key))
2770 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2771 silc_cipher_free(key);
2775 channel_name = strdup(channel_name);
2777 /* Create the channel */
2778 entry = silc_idlist_add_channel(server->local_list, channel_name,
2779 SILC_CHANNEL_MODE_NONE, channel_id,
2780 NULL, key, newhmac);
2782 silc_free(channel_name);
2786 /* Now create the actual key material */
2787 silc_server_create_channel_key(server, entry,
2788 silc_cipher_get_key_len(key) / 8);
2790 /* Notify other routers about the new channel. We send the packet
2791 to our primary route. */
2792 if (broadcast && server->standalone == FALSE)
2793 silc_server_send_new_channel(server, server->router->connection, TRUE,
2794 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2797 server->stat.my_channels++;
2802 /* Channel's key re-key timeout callback. */
2804 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2806 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2807 SilcServer server = (SilcServer)rekey->context;
2809 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2810 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2812 silc_task_register(server->timeout_queue, 0,
2813 silc_server_channel_key_rekey,
2814 (void *)rekey, 3600, 0,
2816 SILC_TASK_PRI_NORMAL);
2819 /* Generates new channel key. This is used to create the initial channel key
2820 but also to re-generate new key for channel. If `key_len' is provided
2821 it is the bytes of the key length. */
2823 void silc_server_create_channel_key(SilcServer server,
2824 SilcChannelEntry channel,
2828 unsigned char channel_key[32], hash[32];
2831 SILC_LOG_DEBUG(("Generating channel key"));
2833 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2834 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2838 if (!channel->channel_key)
2839 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2844 else if (channel->key_len)
2845 len = channel->key_len / 8;
2847 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2849 /* Create channel key */
2850 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2853 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2855 /* Remove old key if exists */
2857 memset(channel->key, 0, channel->key_len / 8);
2858 silc_free(channel->key);
2862 channel->key_len = len * 8;
2863 channel->key = silc_calloc(len, sizeof(*channel->key));
2864 memcpy(channel->key, channel_key, len);
2865 memset(channel_key, 0, sizeof(channel_key));
2867 /* Generate HMAC key from the channel key data and set it */
2869 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2870 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2871 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2872 memset(hash, 0, sizeof(hash));
2874 if (server->server_type == SILC_ROUTER) {
2875 if (!channel->rekey)
2876 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2877 channel->rekey->context = (void *)server;
2878 channel->rekey->channel = channel;
2879 channel->rekey->key_len = key_len;
2881 silc_task_unregister_by_callback(server->timeout_queue,
2882 silc_server_channel_key_rekey);
2883 silc_task_register(server->timeout_queue, 0,
2884 silc_server_channel_key_rekey,
2885 (void *)channel->rekey, 3600, 0,
2887 SILC_TASK_PRI_NORMAL);
2891 /* Saves the channel key found in the encoded `key_payload' buffer. This
2892 function is used when we receive Channel Key Payload and also when we're
2893 processing JOIN command reply. Returns entry to the channel. */
2895 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2896 SilcBuffer key_payload,
2897 SilcChannelEntry channel)
2899 SilcChannelKeyPayload payload = NULL;
2900 SilcChannelID *id = NULL;
2901 unsigned char *tmp, hash[32];
2905 SILC_LOG_DEBUG(("Start"));
2907 /* Decode channel key payload */
2908 payload = silc_channel_key_payload_parse(key_payload);
2910 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2915 /* Get the channel entry */
2918 /* Get channel ID */
2919 tmp = silc_channel_key_get_id(payload, &tmp_len);
2920 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2926 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2928 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2930 SILC_LOG_ERROR(("Received key for non-existent channel"));
2936 tmp = silc_channel_key_get_key(payload, &tmp_len);
2942 cipher = silc_channel_key_get_cipher(payload, NULL);
2948 /* Remove old key if exists */
2950 memset(channel->key, 0, channel->key_len / 8);
2951 silc_free(channel->key);
2952 silc_cipher_free(channel->channel_key);
2955 /* Create new cipher */
2956 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2961 if (channel->cipher)
2962 silc_free(channel->cipher);
2963 channel->cipher = strdup(cipher);
2966 channel->key_len = tmp_len * 8;
2967 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2968 memcpy(channel->key, tmp, tmp_len);
2969 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2971 /* Generate HMAC key from the channel key data and set it */
2973 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2974 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2975 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2977 memset(hash, 0, sizeof(hash));
2978 memset(tmp, 0, tmp_len);
2980 if (server->server_type == SILC_ROUTER) {
2981 if (!channel->rekey)
2982 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2983 channel->rekey->context = (void *)server;
2984 channel->rekey->channel = channel;
2986 silc_task_unregister_by_callback(server->timeout_queue,
2987 silc_server_channel_key_rekey);
2988 silc_task_register(server->timeout_queue, 0,
2989 silc_server_channel_key_rekey,
2990 (void *)channel->rekey, 3600, 0,
2992 SILC_TASK_PRI_NORMAL);
2999 silc_channel_key_payload_free(payload);
3004 /* Heartbeat callback. This function is set as argument for the
3005 silc_socket_set_heartbeat function. The library will call this function
3006 at the set time interval. */
3008 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3011 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3013 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3016 /* Send the heartbeat */
3017 silc_server_send_heartbeat(hb->server, sock);
3020 /* Returns assembled of all servers in the given ID list. The packet's
3021 form is dictated by the New ID payload. */
3023 static void silc_server_announce_get_servers(SilcServer server,
3025 SilcBuffer *servers)
3027 SilcIDCacheList list;
3028 SilcIDCacheEntry id_cache;
3029 SilcServerEntry entry;
3032 /* Go through all clients in the list */
3033 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3034 SILC_ID_SERVER, &list)) {
3035 if (silc_idcache_list_first(list, &id_cache)) {
3037 entry = (SilcServerEntry)id_cache->context;
3039 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3041 *servers = silc_buffer_realloc(*servers,
3043 (*servers)->truelen + idp->len :
3045 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3046 silc_buffer_put(*servers, idp->data, idp->len);
3047 silc_buffer_pull(*servers, idp->len);
3048 silc_buffer_free(idp);
3050 if (!silc_idcache_list_next(list, &id_cache))
3055 silc_idcache_list_free(list);
3059 /* This function is used by router to announce existing servers to our
3060 primary router when we've connected to it. */
3062 void silc_server_announce_servers(SilcServer server)
3064 SilcBuffer servers = NULL;
3066 SILC_LOG_DEBUG(("Announcing servers"));
3068 /* Get servers in local list */
3069 silc_server_announce_get_servers(server, server->local_list, &servers);
3071 /* Get servers in global list */
3072 silc_server_announce_get_servers(server, server->global_list, &servers);
3075 silc_buffer_push(servers, servers->data - servers->head);
3076 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3078 /* Send the packet */
3079 silc_server_packet_send(server, server->router->connection,
3080 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3081 servers->data, servers->len, TRUE);
3083 silc_buffer_free(servers);
3087 /* Returns assembled packet of all clients in the given ID list. The
3088 packet's form is dictated by the New ID Payload. */
3090 static void silc_server_announce_get_clients(SilcServer server,
3092 SilcBuffer *clients)
3094 SilcIDCacheList list;
3095 SilcIDCacheEntry id_cache;
3096 SilcClientEntry client;
3099 /* Go through all clients in the list */
3100 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3101 SILC_ID_CLIENT, &list)) {
3102 if (silc_idcache_list_first(list, &id_cache)) {
3104 client = (SilcClientEntry)id_cache->context;
3106 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3108 *clients = silc_buffer_realloc(*clients,
3110 (*clients)->truelen + idp->len :
3112 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3113 silc_buffer_put(*clients, idp->data, idp->len);
3114 silc_buffer_pull(*clients, idp->len);
3115 silc_buffer_free(idp);
3117 if (!silc_idcache_list_next(list, &id_cache))
3122 silc_idcache_list_free(list);
3126 /* This function is used to announce our existing clients to our router
3127 when we've connected to it. */
3129 void silc_server_announce_clients(SilcServer server)
3131 SilcBuffer clients = NULL;
3133 SILC_LOG_DEBUG(("Announcing clients"));
3135 /* Get clients in local list */
3136 silc_server_announce_get_clients(server, server->local_list,
3139 /* As router we announce our global list as well */
3140 if (server->server_type == SILC_ROUTER)
3141 silc_server_announce_get_clients(server, server->global_list,
3145 silc_buffer_push(clients, clients->data - clients->head);
3146 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3148 /* Send the packet */
3149 silc_server_packet_send(server, server->router->connection,
3150 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3151 clients->data, clients->len, TRUE);
3153 silc_buffer_free(clients);
3158 silc_server_announce_encode_join(uint32 argc, ...)
3163 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3166 /* Returns assembled packets for channel users of the `channel'. */
3168 void silc_server_announce_get_channel_users(SilcServer server,
3169 SilcChannelEntry channel,
3170 SilcBuffer *channel_users)
3172 SilcChannelClientEntry chl;
3173 SilcBuffer chidp, clidp;
3177 SILC_LOG_DEBUG(("Start"));
3179 /* Now find all users on the channel */
3180 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3181 silc_list_start(channel->user_list);
3182 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3183 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3184 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3185 chidp->data, chidp->len);
3188 silc_buffer_realloc(*channel_users,
3190 (*channel_users)->truelen + len : len));
3191 silc_buffer_pull_tail(*channel_users,
3192 ((*channel_users)->end -
3193 (*channel_users)->data));
3195 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3196 silc_buffer_pull(*channel_users, len);
3197 silc_buffer_free(clidp);
3198 silc_buffer_free(tmp);
3200 silc_buffer_free(chidp);
3203 /* Returns assembled packets for all channels and users on those channels
3204 from the given ID List. The packets are in the form dictated by the
3205 New Channel and New Channel User payloads. */
3207 void silc_server_announce_get_channels(SilcServer server,
3209 SilcBuffer *channels,
3210 SilcBuffer *channel_users)
3212 SilcIDCacheList list;
3213 SilcIDCacheEntry id_cache;
3214 SilcChannelEntry channel;
3219 SILC_LOG_DEBUG(("Start"));
3221 /* Go through all channels in the list */
3222 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3223 SILC_ID_CHANNEL, &list)) {
3224 if (silc_idcache_list_first(list, &id_cache)) {
3226 channel = (SilcChannelEntry)id_cache->context;
3228 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3229 name_len = strlen(channel->channel_name);
3231 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3233 silc_buffer_realloc(*channels,
3234 (*channels ? (*channels)->truelen + len : len));
3235 silc_buffer_pull_tail(*channels,
3236 ((*channels)->end - (*channels)->data));
3237 silc_buffer_format(*channels,
3238 SILC_STR_UI_SHORT(name_len),
3239 SILC_STR_UI_XNSTRING(channel->channel_name,
3241 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3242 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3243 SILC_STR_UI_INT(channel->mode),
3245 silc_buffer_pull(*channels, len);
3247 silc_server_announce_get_channel_users(server, channel,
3252 if (!silc_idcache_list_next(list, &id_cache))
3257 silc_idcache_list_free(list);
3261 /* This function is used to announce our existing channels to our router
3262 when we've connected to it. This also announces the users on the
3263 channels to the router. */
3265 void silc_server_announce_channels(SilcServer server)
3267 SilcBuffer channels = NULL, channel_users = NULL;
3269 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3271 /* Get channels and channel users in local list */
3272 silc_server_announce_get_channels(server, server->local_list,
3273 &channels, &channel_users);
3275 /* Get channels and channel users in global list */
3276 silc_server_announce_get_channels(server, server->global_list,
3277 &channels, &channel_users);
3280 silc_buffer_push(channels, channels->data - channels->head);
3281 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3283 /* Send the packet */
3284 silc_server_packet_send(server, server->router->connection,
3285 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3286 channels->data, channels->len,
3289 silc_buffer_free(channels);
3292 if (channel_users) {
3293 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3294 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3295 channel_users->len);
3297 /* Send the packet */
3298 silc_server_packet_send(server, server->router->connection,
3299 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3300 channel_users->data, channel_users->len,
3303 silc_buffer_free(channel_users);
3307 /* Failure timeout callback. If this is called then we will immediately
3308 process the received failure. We always process the failure with timeout
3309 since we do not want to blindly trust to received failure packets.
3310 This won't be called (the timeout is cancelled) if the failure was
3311 bogus (it is bogus if remote does not close the connection after sending
3314 SILC_TASK_CALLBACK(silc_server_failure_callback)
3316 SilcServerFailureContext f = (SilcServerFailureContext)context;
3318 if (f->sock->protocol) {
3319 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3320 f->sock->protocol->execute(f->server->timeout_queue, 0,
3321 f->sock->protocol, f->sock->sock, 0, 0);
3327 /* Assembles user list and users mode list from the `channel'. */
3329 void silc_server_get_users_on_channel(SilcServer server,
3330 SilcChannelEntry channel,
3331 SilcBuffer *user_list,
3332 SilcBuffer *mode_list,
3335 SilcChannelClientEntry chl;
3336 SilcBuffer client_id_list;
3337 SilcBuffer client_mode_list;
3339 uint32 list_count = 0;
3341 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3342 silc_list_count(channel->user_list));
3343 client_mode_list = silc_buffer_alloc(4 *
3344 silc_list_count(channel->user_list));
3345 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3346 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3347 silc_list_start(channel->user_list);
3348 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3350 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3351 silc_buffer_put(client_id_list, idp->data, idp->len);
3352 silc_buffer_pull(client_id_list, idp->len);
3353 silc_buffer_free(idp);
3355 /* Client's mode on channel */
3356 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3357 silc_buffer_pull(client_mode_list, 4);
3361 silc_buffer_push(client_id_list,
3362 client_id_list->data - client_id_list->head);
3363 silc_buffer_push(client_mode_list,
3364 client_mode_list->data - client_mode_list->head);
3366 *user_list = client_id_list;
3367 *mode_list = client_mode_list;
3368 *user_count = list_count;
3371 /* Saves users and their modes to the `channel'. */
3373 void silc_server_save_users_on_channel(SilcServer server,
3374 SilcSocketConnection sock,
3375 SilcChannelEntry channel,
3376 SilcClientID *noadd,
3377 SilcBuffer user_list,
3378 SilcBuffer mode_list,
3383 /* Cache the received Client ID's and modes. This cache expires
3384 whenever server sends notify message to channel. It means two things;
3385 some user has joined or leaved the channel. XXX TODO! */
3386 for (i = 0; i < user_count; i++) {
3389 SilcClientID *client_id;
3390 SilcClientEntry client;
3393 SILC_GET16_MSB(idp_len, user_list->data + 2);
3395 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3396 silc_buffer_pull(user_list, idp_len);
3401 SILC_GET32_MSB(mode, mode_list->data);
3402 silc_buffer_pull(mode_list, 4);
3404 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3405 silc_free(client_id);
3409 /* Check if we have this client cached already. */
3410 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3413 client = silc_idlist_find_client_by_id(server->global_list,
3416 /* If router did not find such Client ID in its lists then this must
3417 be bogus client or some router in the net is buggy. */
3418 if (server->server_type == SILC_ROUTER) {
3419 silc_free(client_id);
3423 /* We don't have that client anywhere, add it. The client is added
3424 to global list since server didn't have it in the lists so it must be
3426 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3428 silc_id_dup(client_id, SILC_ID_CLIENT),
3429 sock->user_data, NULL);
3431 silc_free(client_id);
3435 client->data.registered = TRUE;
3438 silc_free(client_id);
3440 if (!silc_server_client_on_channel(client, channel)) {
3441 /* Client was not on the channel, add it. */
3442 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3443 chl->client = client;
3445 chl->channel = channel;
3446 silc_list_add(channel->user_list, chl);
3447 silc_list_add(client->channels, chl);
3452 /* Lookups route to the client indicated by the `id_data'. The connection
3453 object and internal data object is returned. Returns NULL if route
3454 could not be found to the client. If the `client_id' is specified then
3455 it is used and the `id_data' is ignored. */
3457 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3458 unsigned char *id_data,
3460 SilcClientID *client_id,
3461 SilcIDListData *idata)
3464 SilcClientEntry client;
3466 SILC_LOG_DEBUG(("Start"));
3468 /* Decode destination Client ID */
3470 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3472 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3476 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3479 /* If the destination belongs to our server we don't have to route
3480 the packet anywhere but to send it to the local destination. */
3481 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3485 if (client && client->data.registered == FALSE)
3488 /* If we are router and the client has router then the client is in
3489 our cell but not directly connected to us. */
3490 if (server->server_type == SILC_ROUTER && client->router) {
3491 /* We are of course in this case the client's router thus the real
3492 "router" of the client is the server who owns the client. Thus
3493 we will send the packet to that server. */
3495 *idata = (SilcIDListData)client->router;
3496 return client->router->connection;
3499 /* Seems that client really is directly connected to us */
3501 *idata = (SilcIDListData)client;
3502 return client->connection;
3505 /* Destination belongs to someone not in this server. If we are normal
3506 server our action is to send the packet to our router. */
3507 if (server->server_type == SILC_SERVER && !server->standalone) {
3510 *idata = (SilcIDListData)server->router;
3511 return server->router->connection;
3514 /* We are router and we will perform route lookup for the destination
3515 and send the packet to fastest route. */
3516 if (server->server_type == SILC_ROUTER && !server->standalone) {
3517 /* Check first that the ID is valid */
3518 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3520 SilcSocketConnection dst_sock;
3522 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3526 *idata = (SilcIDListData)dst_sock->user_data;
3535 /* Encodes and returns channel list of channels the `client' has joined.
3536 Secret channels are not put to the list. */
3538 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3539 SilcClientEntry client)
3541 SilcBuffer buffer = NULL;
3542 SilcChannelEntry channel;
3543 SilcChannelClientEntry chl;
3548 silc_list_start(client->channels);
3549 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3550 channel = chl->channel;
3552 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3555 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3556 name_len = strlen(channel->channel_name);
3558 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3559 buffer = silc_buffer_realloc(buffer,
3560 (buffer ? (buffer)->truelen + len : len));
3561 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3562 silc_buffer_format(buffer,
3563 SILC_STR_UI_SHORT(name_len),
3564 SILC_STR_UI_XNSTRING(channel->channel_name,
3566 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3567 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3568 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3570 silc_buffer_pull(buffer, len);
3575 silc_buffer_push(buffer, buffer->data - buffer->head);
3580 /* Finds client entry by Client ID and if it is not found then resolves
3581 it using WHOIS command. */
3583 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3584 SilcClientID *client_id)
3586 SilcClientEntry client;
3588 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3590 client = silc_idlist_find_client_by_id(server->global_list,
3592 if (!client && server->server_type == SILC_ROUTER)
3596 if (!client && server->standalone)
3599 if (!client || !client->nickname || !client->username) {
3600 SilcBuffer buffer, idp;
3602 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3603 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3604 ++server->cmd_ident, 1,
3605 3, idp->data, idp->len);
3606 silc_server_packet_send(server, client ? client->router->connection :
3607 server->router->connection,
3608 SILC_PACKET_COMMAND, 0,
3609 buffer->data, buffer->len, FALSE);
3610 silc_buffer_free(idp);
3611 silc_buffer_free(buffer);
3617 /* A timeout callback for the re-key. We will be the initiator of the
3620 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3622 SilcSocketConnection sock = (SilcSocketConnection)context;
3623 SilcIDListData idata = (SilcIDListData)sock->user_data;
3624 SilcServer server = (SilcServer)idata->rekey->context;
3625 SilcProtocol protocol;
3626 SilcServerRekeyInternalContext *proto_ctx;
3628 SILC_LOG_DEBUG(("Start"));
3630 /* Allocate internal protocol context. This is sent as context
3632 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3633 proto_ctx->server = (void *)server;
3634 proto_ctx->sock = sock;
3635 proto_ctx->responder = FALSE;
3636 proto_ctx->pfs = idata->rekey->pfs;
3638 /* Perform rekey protocol. Will call the final callback after the
3639 protocol is over. */
3640 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3641 &protocol, proto_ctx, silc_server_rekey_final);
3642 sock->protocol = protocol;
3644 /* Run the protocol */
3645 protocol->execute(server->timeout_queue, 0, protocol,
3648 /* Re-register re-key timeout */
3649 silc_task_register(server->timeout_queue, sock->sock,
3650 silc_server_rekey_callback,
3651 context, idata->rekey->timeout, 0,
3652 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3655 /* The final callback for the REKEY protocol. This will actually take the
3656 new key material into use. */
3658 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3660 SilcProtocol protocol = (SilcProtocol)context;
3661 SilcServerRekeyInternalContext *ctx =
3662 (SilcServerRekeyInternalContext *)protocol->context;
3663 SilcServer server = (SilcServer)ctx->server;
3664 SilcSocketConnection sock = ctx->sock;
3666 SILC_LOG_DEBUG(("Start"));
3668 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3669 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3670 /* Error occured during protocol */
3671 silc_protocol_cancel(server->timeout_queue, protocol);
3672 silc_protocol_free(protocol);
3673 sock->protocol = NULL;
3675 silc_packet_context_free(ctx->packet);
3677 silc_ske_free(ctx->ske);
3682 /* Take the keys into use */
3683 if (ctx->pfs == TRUE)
3684 silc_server_protocol_rekey_generate_pfs(server, ctx);
3686 silc_server_protocol_rekey_generate(server, ctx);
3689 silc_protocol_free(protocol);
3690 sock->protocol = NULL;
3692 silc_packet_context_free(ctx->packet);
3694 silc_ske_free(ctx->ske);