5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 silc_server_config_register_ciphers(server->config);
149 silc_server_config_register_pkcs(server->config);
150 silc_server_config_register_hashfuncs(server->config);
151 silc_server_config_register_hmacs(server->config);
153 /* Initialize random number generator for the server. */
154 server->rng = silc_rng_alloc();
155 silc_rng_init(server->rng);
156 silc_rng_global_init(server->rng);
158 /* Initialize hash functions for server to use */
159 silc_hash_alloc("md5", &server->md5hash);
160 silc_hash_alloc("sha1", &server->sha1hash);
162 /* Initialize none cipher */
163 silc_cipher_alloc("none", &server->none_cipher);
165 /* Create a listening server. Note that our server can listen on
166 multiple ports. All listeners are created here and now. */
167 /* XXX Still check this whether to use server_info or listen_port. */
169 while(server->config->listen_port) {
172 tmp = silc_net_create_server(server->config->listen_port->port,
173 server->config->listen_port->host);
177 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
178 sock[sock_count] = tmp;
179 server->config->listen_port = server->config->listen_port->next;
183 /* Initialize ID caches */
184 server->local_list->clients =
185 silc_idcache_alloc(0, silc_idlist_client_destructor);
186 server->local_list->servers = silc_idcache_alloc(0, NULL);
187 server->local_list->channels = silc_idcache_alloc(0, NULL);
189 /* These are allocated for normal server as well as these hold some
190 global information that the server has fetched from its router. For
191 router these are used as they are supposed to be used on router. */
192 server->global_list->clients =
193 silc_idcache_alloc(0, silc_idlist_client_destructor);
194 server->global_list->servers = silc_idcache_alloc(0, NULL);
195 server->global_list->channels = silc_idcache_alloc(0, NULL);
197 /* Allocate the entire socket list that is used in server. Eventually
198 all connections will have entry in this table (it is a table of
199 pointers to the actual object that is allocated individually
201 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
202 sizeof(*server->sockets));
204 for (i = 0; i < sock_count; i++) {
205 SilcSocketConnection newsocket = NULL;
207 /* Set socket to non-blocking mode */
208 silc_net_set_socket_nonblock(sock[i]);
209 server->sock = sock[i];
211 /* Create a Server ID for the server. */
212 silc_id_create_server_id(sock[i], server->rng, &id);
218 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
219 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
220 server->id_type = SILC_ID_SERVER;
221 server->server_name = server->config->server_info->server_name;
223 /* Add ourselves to the server list. We don't have a router yet
224 beacuse we haven't established a route yet. It will be done later.
225 For now, NULL is sent as router. This allocates new entry to
228 silc_idlist_add_server(server->local_list,
229 server->config->server_info->server_name,
230 server->server_type, server->id, NULL, NULL);
232 SILC_LOG_ERROR(("Could not add ourselves to cache"));
236 /* Add ourselves also to the socket table. The entry allocated above
237 is sent as argument for fast referencing in the future. */
238 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
241 server->sockets[sock[i]] = newsocket;
243 /* Put the allocated socket pointer also to the entry allocated above
244 for fast back-referencing to the socket list. */
245 id_entry->connection = (void *)server->sockets[sock[i]];
246 server->id_entry = id_entry;
249 /* Register the task queues. In SILC we have by default three task queues.
250 One task queue for non-timeout tasks which perform different kind of
251 I/O on file descriptors, timeout task queue for timeout tasks, and,
252 generic non-timeout task queue whose tasks apply to all connections. */
253 silc_task_queue_alloc(&server->io_queue, TRUE);
254 if (!server->io_queue) {
257 silc_task_queue_alloc(&server->timeout_queue, TRUE);
258 if (!server->timeout_queue) {
261 silc_task_queue_alloc(&server->generic_queue, TRUE);
262 if (!server->generic_queue) {
266 /* Register protocols */
267 silc_server_protocols_register();
269 /* Initialize the scheduler */
270 silc_schedule_init(&server->io_queue, &server->timeout_queue,
271 &server->generic_queue,
272 SILC_SERVER_MAX_CONNECTIONS);
274 /* Add the first task to the queue. This is task that is executed by
275 timeout. It expires as soon as the caller calls silc_server_run. This
276 task performs authentication protocol and key exchange with our
278 silc_task_register(server->timeout_queue, sock[0],
279 silc_server_connect_to_router,
280 (void *)server, 0, 1,
282 SILC_TASK_PRI_NORMAL);
284 /* Add listener task to the queue. This task receives new connections to the
285 server. This task remains on the queue until the end of the program. */
286 silc_task_register(server->io_queue, sock[0],
287 silc_server_accept_new_connection,
288 (void *)server, 0, 0,
290 SILC_TASK_PRI_NORMAL);
291 server->listenning = TRUE;
293 /* If server connections has been configured then we must be router as
294 normal server cannot have server connections, only router connections. */
295 if (server->config->servers)
296 server->server_type = SILC_ROUTER;
298 /* Register the ID Cache purge task. This periodically purges the ID cache
299 and removes the expired cache entries. */
301 /* Clients local list */
302 purge = silc_calloc(1, sizeof(*purge));
303 purge->cache = server->local_list->clients;
304 purge->timeout_queue = server->timeout_queue;
305 silc_task_register(purge->timeout_queue, 0,
307 (void *)purge, 600, 0,
308 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
310 /* Clients global list */
311 purge = silc_calloc(1, sizeof(*purge));
312 purge->cache = server->global_list->clients;
313 purge->timeout_queue = server->timeout_queue;
314 silc_task_register(purge->timeout_queue, 0,
316 (void *)purge, 300, 0,
317 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
319 SILC_LOG_DEBUG(("Server initialized"));
321 /* We are done here, return succesfully */
324 silc_task_queue_free(server->timeout_queue);
326 silc_task_queue_free(server->io_queue);
328 for (i = 0; i < sock_count; i++)
329 silc_net_close_server(sock[i]);
334 /* Fork server to background and set gid+uid to non-root.
335 Silcd will not run as root, so trying to set either user or group to
336 root will cause silcd to exit. */
338 void silc_server_daemonise(SilcServer server)
340 /* Are we executing silcd as root or a regular user? */
347 if (!server->config->identity || !server->config->identity->user ||
348 !server->config->identity->group) {
349 fprintf(stderr, "Error:"
350 "\tSILC server must not be run as root. For the security of your\n"
351 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
352 "\tuser account. Modify the [Identity] configuration section to run\n"
353 "\tthe server as non-root user.\n");
357 /* Get the values given for user and group in configuration file */
358 user=server->config->identity->user;
359 group=server->config->identity->group;
361 /* Check whether the user/group information is text */
362 if (atoi(user)!=0 || atoi(group)!=0) {
363 SILC_LOG_DEBUG(("Invalid user and/or group information"));
364 SILC_LOG_DEBUG(("User and/or group given as number"));
365 fprintf(stderr, "Invalid user and/or group information\n");
366 fprintf(stderr, "Please assign them as names, not numbers\n");
370 /* Catch the nasty incident of string "0" returning 0 from atoi */
371 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
372 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
373 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
381 fprintf(stderr, "No such user %s found\n", user);
386 fprintf(stderr, "No such group %s found\n", group);
390 /* Check whether user and/or group is set to root. If yes, exit
391 immediately. Otherwise, setgid and setuid server to user.group */
392 if (gr->gr_gid==0 || pw->pw_uid==0) {
393 fprintf(stderr, "Error:"
394 "\tSILC server must not be run as root. For the security of your\n"
395 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
396 "\tuser account. Modify the [Identity] configuration section to run\n"
397 "\tthe server as non-root user.\n");
400 /* Fork server to background, making it a daemon */
402 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
403 SILC_LOG_DEBUG(("Forking SILC server to background"));
408 SILC_LOG_DEBUG(("Changing to group %s", group));
409 if(setgid(gr->gr_gid)==0) {
410 SILC_LOG_DEBUG(("Setgid to %s", group));
412 SILC_LOG_DEBUG(("Setgid to %s failed", group));
413 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
417 SILC_LOG_DEBUG(("Changing to user nobody"));
418 if(setuid(pw->pw_uid)==0) {
419 SILC_LOG_DEBUG(("Setuid to %s", user));
421 SILC_LOG_DEBUG(("Setuid to %s failed", user));
422 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
428 /* Fork server to background, making it a daemon */
430 SILC_LOG_DEBUG(("Server started as user"));
431 SILC_LOG_DEBUG(("Forking SILC server to background"));
438 /* Stops the SILC server. This function is used to shutdown the server.
439 This is usually called after the scheduler has returned. After stopping
440 the server one should call silc_server_free. */
442 void silc_server_stop(SilcServer server)
444 SILC_LOG_DEBUG(("Stopping server"));
446 /* Stop the scheduler, although it might be already stopped. This
447 doesn't hurt anyone. This removes all the tasks and task queues,
449 silc_schedule_stop();
450 silc_schedule_uninit();
452 silc_server_protocols_unregister();
454 SILC_LOG_DEBUG(("Server stopped"));
457 /* The heart of the server. This runs the scheduler thus runs the server.
458 When this returns the server has been stopped and the program will
461 void silc_server_run(SilcServer server)
463 SILC_LOG_DEBUG(("Running server"));
465 /* Start the scheduler, the heart of the SILC server. When this returns
466 the program will be terminated. */
470 /* Timeout callback that will be called to retry connecting to remote
471 router. This is used by both normal and router server. This will wait
472 before retrying the connecting. The timeout is generated by exponential
473 backoff algorithm. */
475 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
477 SilcServerConnection sconn = (SilcServerConnection)context;
478 SilcServer server = sconn->server;
480 SILC_LOG_INFO(("Retrying connecting to a router"));
482 /* Calculate next timeout */
483 if (sconn->retry_count >= 1) {
484 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
485 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
486 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
488 sconn->retry_timeout = server->params->retry_interval_min;
490 sconn->retry_count++;
491 sconn->retry_timeout = sconn->retry_timeout +
492 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
494 /* If we've reached max retry count, give up. */
495 if (sconn->retry_count > server->params->retry_count &&
496 server->params->retry_keep_trying == FALSE) {
497 SILC_LOG_ERROR(("Could not connect to router, giving up"));
501 /* Wait one before retrying */
502 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
503 context, sconn->retry_timeout,
504 server->params->retry_interval_min_usec,
505 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
508 /* Generic routine to use connect to a router. */
510 SILC_TASK_CALLBACK(silc_server_connect_router)
512 SilcServerConnection sconn = (SilcServerConnection)context;
513 SilcServer server = sconn->server;
514 SilcSocketConnection newsocket;
515 SilcProtocol protocol;
516 SilcServerKEInternalContext *proto_ctx;
519 SILC_LOG_INFO(("Connecting to the router %s on port %d",
520 sconn->remote_host, sconn->remote_port));
522 /* Connect to remote host */
523 sock = silc_net_create_connection(sconn->remote_port,
526 SILC_LOG_ERROR(("Could not connect to router"));
527 silc_task_register(server->timeout_queue, fd,
528 silc_server_connect_to_router_retry,
529 context, 0, 1, SILC_TASK_TIMEOUT,
530 SILC_TASK_PRI_NORMAL);
534 /* Set socket options */
535 silc_net_set_socket_nonblock(sock);
536 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
538 /* Create socket connection for the connection. Even though we
539 know that we are connecting to a router we will mark the socket
540 to be unknown connection until we have executed authentication
542 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
543 server->sockets[sock] = newsocket;
544 newsocket->hostname = strdup(sconn->remote_host);
545 newsocket->ip = strdup(sconn->remote_host);
546 newsocket->port = sconn->remote_port;
547 sconn->sock = newsocket;
549 /* Allocate internal protocol context. This is sent as context
551 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
552 proto_ctx->server = (void *)server;
553 proto_ctx->context = (void *)sconn;
554 proto_ctx->sock = newsocket;
555 proto_ctx->rng = server->rng;
556 proto_ctx->responder = FALSE;
558 /* Perform key exchange protocol. silc_server_connect_to_router_second
559 will be called after the protocol is finished. */
560 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
561 &protocol, proto_ctx,
562 silc_server_connect_to_router_second);
563 newsocket->protocol = protocol;
565 /* Register a timeout task that will be executed if the protocol
566 is not executed within set limit. */
567 proto_ctx->timeout_task =
568 silc_task_register(server->timeout_queue, sock,
569 silc_server_timeout_remote,
570 server, server->params->protocol_timeout,
571 server->params->protocol_timeout_usec,
575 /* Register the connection for network input and output. This sets
576 that scheduler will listen for incoming packets for this connection
577 and sets that outgoing packets may be sent to this connection as
578 well. However, this doesn't set the scheduler for outgoing traffic,
579 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
580 later when outgoing data is available. */
581 context = (void *)server;
582 SILC_REGISTER_CONNECTION_FOR_IO(sock);
584 /* Run the protocol */
585 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
588 /* This function connects to our primary router or if we are a router this
589 establishes all our primary routes. This is called at the start of the
590 server to do authentication and key exchange with our router - called
593 SILC_TASK_CALLBACK(silc_server_connect_to_router)
595 SilcServer server = (SilcServer)context;
596 SilcServerConnection sconn;
598 SILC_LOG_DEBUG(("Connecting to router(s)"));
600 /* If we are normal SILC server we need to connect to our cell's
602 if (server->server_type == SILC_SERVER) {
603 SILC_LOG_DEBUG(("We are normal server"));
605 /* Create connection to the router, if configured. */
606 if (server->config->routers) {
608 /* Allocate connection object for hold connection specific stuff. */
609 sconn = silc_calloc(1, sizeof(*sconn));
610 sconn->server = server;
611 sconn->remote_host = strdup(server->config->routers->host);
612 sconn->remote_port = server->config->routers->port;
614 silc_task_register(server->timeout_queue, fd,
615 silc_server_connect_router,
616 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
617 SILC_TASK_PRI_NORMAL);
622 /* If we are a SILC router we need to establish all of our primary
624 if (server->server_type == SILC_ROUTER) {
625 SilcServerConfigSectionServerConnection *ptr;
627 SILC_LOG_DEBUG(("We are router"));
629 /* Create the connections to all our routes */
630 ptr = server->config->routers;
633 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
634 ptr->initiator ? "Initiator" : "Responder",
635 ptr->host, ptr->port));
637 if (ptr->initiator) {
638 /* Allocate connection object for hold connection specific stuff. */
639 sconn = silc_calloc(1, sizeof(*sconn));
640 sconn->server = server;
641 sconn->remote_host = strdup(ptr->host);
642 sconn->remote_port = ptr->port;
644 silc_task_register(server->timeout_queue, fd,
645 silc_server_connect_router,
646 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
647 SILC_TASK_PRI_NORMAL);
657 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
659 /* There wasn't a configured router, we will continue but we don't
660 have a connection to outside world. We will be standalone server. */
661 server->standalone = TRUE;
664 /* Second part of connecting to router(s). Key exchange protocol has been
665 executed and now we will execute authentication protocol. */
667 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
669 SilcProtocol protocol = (SilcProtocol)context;
670 SilcServerKEInternalContext *ctx =
671 (SilcServerKEInternalContext *)protocol->context;
672 SilcServer server = (SilcServer)ctx->server;
673 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
674 SilcSocketConnection sock = server->sockets[fd];
675 SilcServerConnAuthInternalContext *proto_ctx;
676 SilcServerConfigSectionServerConnection *conn = NULL;
678 SILC_LOG_DEBUG(("Start"));
680 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
681 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
682 /* Error occured during protocol */
683 silc_protocol_free(protocol);
684 sock->protocol = NULL;
685 silc_ske_free_key_material(ctx->keymat);
687 silc_packet_context_free(ctx->packet);
689 silc_ske_free(ctx->ske);
691 silc_free(ctx->dest_id);
693 silc_task_unregister_by_callback(server->timeout_queue,
694 silc_server_failure_callback);
695 silc_server_disconnect_remote(server, sock, "Server closed connection: "
696 "Key exchange failed");
700 /* We now have the key material as the result of the key exchange
701 protocol. Take the key material into use. Free the raw key material
702 as soon as we've set them into use. */
703 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
704 ctx->ske->prop->cipher,
705 ctx->ske->prop->pkcs,
706 ctx->ske->prop->hash,
707 ctx->ske->prop->hmac,
708 ctx->ske->prop->group,
710 silc_protocol_free(protocol);
711 sock->protocol = NULL;
712 silc_ske_free_key_material(ctx->keymat);
714 silc_packet_context_free(ctx->packet);
716 silc_ske_free(ctx->ske);
718 silc_free(ctx->dest_id);
720 silc_task_unregister_by_callback(server->timeout_queue,
721 silc_server_failure_callback);
722 silc_server_disconnect_remote(server, sock, "Server closed connection: "
723 "Key exchange failed");
726 silc_ske_free_key_material(ctx->keymat);
728 /* Allocate internal context for the authentication protocol. This
729 is sent as context for the protocol. */
730 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
731 proto_ctx->server = (void *)server;
732 proto_ctx->context = (void *)sconn;
733 proto_ctx->sock = sock;
734 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
735 proto_ctx->dest_id_type = ctx->dest_id_type;
736 proto_ctx->dest_id = ctx->dest_id;
738 /* Resolve the authentication method used in this connection. Check if
739 we find a match from user configured connections */
740 conn = silc_server_config_find_router_conn(server->config,
744 /* Match found. Use the configured authentication method */
745 proto_ctx->auth_meth = conn->auth_meth;
746 if (conn->auth_data) {
747 proto_ctx->auth_data = strdup(conn->auth_data);
748 proto_ctx->auth_data_len = strlen(conn->auth_data);
751 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
752 sock->hostname, sock->ip, sock->port));
753 silc_protocol_free(protocol);
754 sock->protocol = NULL;
756 silc_packet_context_free(ctx->packet);
758 silc_ske_free(ctx->ske);
760 silc_free(ctx->dest_id);
762 silc_task_unregister_by_callback(server->timeout_queue,
763 silc_server_failure_callback);
764 silc_server_disconnect_remote(server, sock, "Server closed connection: "
765 "Key exchange failed");
769 /* Free old protocol as it is finished now */
770 silc_protocol_free(protocol);
772 silc_packet_context_free(ctx->packet);
774 sock->protocol = NULL;
776 /* Allocate the authentication protocol. This is allocated here
777 but we won't start it yet. We will be receiving party of this
778 protocol thus we will wait that connecting party will make
780 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
781 &sock->protocol, proto_ctx,
782 silc_server_connect_to_router_final);
784 /* Register timeout task. If the protocol is not executed inside
785 this timelimit the connection will be terminated. Currently
786 this is 15 seconds and is hard coded limit (XXX). */
787 proto_ctx->timeout_task =
788 silc_task_register(server->timeout_queue, sock->sock,
789 silc_server_timeout_remote,
790 (void *)server, 15, 0,
794 /* Run the protocol */
795 sock->protocol->execute(server->timeout_queue, 0,
796 sock->protocol, sock->sock, 0, 0);
799 /* Finalizes the connection to router. Registers a server task to the
800 queue so that we can accept new connections. */
802 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
804 SilcProtocol protocol = (SilcProtocol)context;
805 SilcServerConnAuthInternalContext *ctx =
806 (SilcServerConnAuthInternalContext *)protocol->context;
807 SilcServer server = (SilcServer)ctx->server;
808 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
809 SilcSocketConnection sock = ctx->sock;
810 SilcServerEntry id_entry;
812 SilcServerHBContext hb_context;
813 unsigned char *id_string;
814 SilcIDListData idata;
816 SILC_LOG_DEBUG(("Start"));
818 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
819 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
820 /* Error occured during protocol */
822 silc_free(ctx->dest_id);
823 silc_server_disconnect_remote(server, sock, "Server closed connection: "
824 "Authentication failed");
828 /* Add a task to the queue. This task receives new connections to the
829 server. This task remains on the queue until the end of the program. */
830 if (!server->listenning) {
831 silc_task_register(server->io_queue, server->sock,
832 silc_server_accept_new_connection,
833 (void *)server, 0, 0,
835 SILC_TASK_PRI_NORMAL);
836 server->listenning = TRUE;
839 /* Send NEW_SERVER packet to the router. We will become registered
840 to the SILC network after sending this packet. */
841 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
842 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
843 strlen(server->server_name));
844 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
845 silc_buffer_format(packet,
846 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
847 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
848 SILC_STR_UI_SHORT(strlen(server->server_name)),
849 SILC_STR_UI_XNSTRING(server->server_name,
850 strlen(server->server_name)),
853 /* Send the packet */
854 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
855 packet->data, packet->len, TRUE);
856 silc_buffer_free(packet);
857 silc_free(id_string);
859 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
861 /* Add the connected router to local server list */
862 server->standalone = FALSE;
863 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
864 SILC_ROUTER, ctx->dest_id, NULL, sock);
867 silc_free(ctx->dest_id);
868 silc_server_disconnect_remote(server, sock, "Server closed connection: "
869 "Authentication failed");
873 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
874 silc_free(sock->user_data);
875 sock->user_data = (void *)id_entry;
876 sock->type = SILC_SOCKET_TYPE_ROUTER;
877 server->id_entry->router = id_entry;
878 server->router = id_entry;
879 idata = (SilcIDListData)sock->user_data;
880 idata->registered = TRUE;
882 /* Perform keepalive. The `hb_context' will be freed automatically
883 when finally calling the silc_socket_free function. XXX hardcoded
885 hb_context = silc_calloc(1, sizeof(*hb_context));
886 hb_context->server = server;
887 silc_socket_set_heartbeat(sock, 600, hb_context,
888 silc_server_perform_heartbeat,
889 server->timeout_queue);
891 /* Register re-key timeout */
892 idata->rekey->timeout = 3600; /* XXX hardcoded */
893 idata->rekey->context = (void *)server;
894 silc_task_register(server->timeout_queue, sock->sock,
895 silc_server_rekey_callback,
896 (void *)sock, idata->rekey->timeout, 0,
897 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
899 /* If we are router then announce our possible servers. */
900 if (server->server_type == SILC_ROUTER)
901 silc_server_announce_servers(server);
903 /* Announce our clients and channels to the router */
904 silc_server_announce_clients(server);
905 silc_server_announce_channels(server);
908 /* Free the temporary connection data context */
910 silc_free(sconn->remote_host);
914 /* Free the protocol object */
915 silc_protocol_free(protocol);
917 silc_packet_context_free(ctx->packet);
919 silc_ske_free(ctx->ske);
921 sock->protocol = NULL;
924 /* Accepts new connections to the server. Accepting new connections are
925 done in three parts to make it async. */
927 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
929 SilcServer server = (SilcServer)context;
930 SilcSocketConnection newsocket;
931 SilcServerKEInternalContext *proto_ctx;
934 SILC_LOG_DEBUG(("Accepting new connection"));
936 server->stat.conn_attempts++;
938 sock = silc_net_accept_connection(server->sock);
940 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
941 server->stat.conn_failures++;
945 /* Check max connections */
946 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
947 SILC_LOG_ERROR(("Refusing connection, server is full"));
948 server->stat.conn_failures++;
952 /* Set socket options */
953 silc_net_set_socket_nonblock(sock);
954 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
956 /* We don't create a ID yet, since we don't know what type of connection
957 this is yet. But, we do add the connection to the socket table. */
958 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
959 server->sockets[sock] = newsocket;
961 /* XXX This MUST be done async as this will block the entire server
962 process. Either we have to do our own resolver stuff or in the future
963 we can use threads. */
964 /* Perform name and address lookups for the remote host. */
965 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
967 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
969 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
970 newsocket->hostname ? newsocket->hostname :
971 newsocket->ip ? newsocket->ip : ""));
972 server->stat.conn_failures++;
975 if (!newsocket->hostname)
976 newsocket->hostname = strdup(newsocket->ip);
978 newsocket->port = silc_net_get_remote_port(sock);
980 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
983 /* Allocate internal context for key exchange protocol. This is
984 sent as context for the protocol. */
985 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
986 proto_ctx->server = context;
987 proto_ctx->sock = newsocket;
988 proto_ctx->rng = server->rng;
989 proto_ctx->responder = TRUE;
991 /* Prepare the connection for key exchange protocol. We allocate the
992 protocol but will not start it yet. The connector will be the
993 initiator of the protocol thus we will wait for initiation from
994 there before we start the protocol. */
995 server->stat.auth_attempts++;
996 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
997 &newsocket->protocol, proto_ctx,
998 silc_server_accept_new_connection_second);
1000 /* Register a timeout task that will be executed if the connector
1001 will not start the key exchange protocol within 60 seconds. For
1002 now, this is a hard coded limit. After 60 secs the connection will
1003 be closed if the key exchange protocol has not been started. */
1004 proto_ctx->timeout_task =
1005 silc_task_register(server->timeout_queue, newsocket->sock,
1006 silc_server_timeout_remote,
1011 /* Register the connection for network input and output. This sets
1012 that scheduler will listen for incoming packets for this connection
1013 and sets that outgoing packets may be sent to this connection as well.
1014 However, this doesn't set the scheduler for outgoing traffic, it
1015 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1016 later when outgoing data is available. */
1017 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1020 /* Second part of accepting new connection. Key exchange protocol has been
1021 performed and now it is time to do little connection authentication
1022 protocol to figure out whether this connection is client or server
1023 and whether it has right to access this server (especially server
1024 connections needs to be authenticated). */
1026 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1028 SilcProtocol protocol = (SilcProtocol)context;
1029 SilcServerKEInternalContext *ctx =
1030 (SilcServerKEInternalContext *)protocol->context;
1031 SilcServer server = (SilcServer)ctx->server;
1032 SilcSocketConnection sock = server->sockets[fd];
1033 SilcServerConnAuthInternalContext *proto_ctx;
1035 SILC_LOG_DEBUG(("Start"));
1037 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1038 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1039 /* Error occured during protocol */
1040 silc_protocol_free(protocol);
1041 sock->protocol = NULL;
1042 silc_ske_free_key_material(ctx->keymat);
1044 silc_packet_context_free(ctx->packet);
1046 silc_ske_free(ctx->ske);
1048 silc_free(ctx->dest_id);
1050 silc_task_unregister_by_callback(server->timeout_queue,
1051 silc_server_failure_callback);
1052 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1053 "Key exchange failed");
1054 server->stat.auth_failures++;
1058 /* We now have the key material as the result of the key exchange
1059 protocol. Take the key material into use. Free the raw key material
1060 as soon as we've set them into use. */
1061 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1062 ctx->ske->prop->cipher,
1063 ctx->ske->prop->pkcs,
1064 ctx->ske->prop->hash,
1065 ctx->ske->prop->hmac,
1066 ctx->ske->prop->group,
1068 silc_protocol_free(protocol);
1069 sock->protocol = NULL;
1070 silc_ske_free_key_material(ctx->keymat);
1072 silc_packet_context_free(ctx->packet);
1074 silc_ske_free(ctx->ske);
1076 silc_free(ctx->dest_id);
1078 silc_task_unregister_by_callback(server->timeout_queue,
1079 silc_server_failure_callback);
1080 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1081 "Key exchange failed");
1082 server->stat.auth_failures++;
1085 silc_ske_free_key_material(ctx->keymat);
1087 /* Allocate internal context for the authentication protocol. This
1088 is sent as context for the protocol. */
1089 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1090 proto_ctx->server = (void *)server;
1091 proto_ctx->sock = sock;
1092 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1093 proto_ctx->responder = TRUE;
1094 proto_ctx->dest_id_type = ctx->dest_id_type;
1095 proto_ctx->dest_id = ctx->dest_id;
1097 /* Free old protocol as it is finished now */
1098 silc_protocol_free(protocol);
1100 silc_packet_context_free(ctx->packet);
1102 sock->protocol = NULL;
1104 /* Allocate the authentication protocol. This is allocated here
1105 but we won't start it yet. We will be receiving party of this
1106 protocol thus we will wait that connecting party will make
1107 their first move. */
1108 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1109 &sock->protocol, proto_ctx,
1110 silc_server_accept_new_connection_final);
1112 /* Register timeout task. If the protocol is not executed inside
1113 this timelimit the connection will be terminated. Currently
1114 this is 60 seconds and is hard coded limit (XXX). */
1115 proto_ctx->timeout_task =
1116 silc_task_register(server->timeout_queue, sock->sock,
1117 silc_server_timeout_remote,
1118 (void *)server, 60, 0,
1123 /* Final part of accepting new connection. The connection has now
1124 been authenticated and keys has been exchanged. We also know whether
1125 this is client or server connection. */
1127 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1129 SilcProtocol protocol = (SilcProtocol)context;
1130 SilcServerConnAuthInternalContext *ctx =
1131 (SilcServerConnAuthInternalContext *)protocol->context;
1132 SilcServer server = (SilcServer)ctx->server;
1133 SilcSocketConnection sock = ctx->sock;
1134 SilcServerHBContext hb_context;
1135 void *id_entry = NULL;
1137 SILC_LOG_DEBUG(("Start"));
1139 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1140 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1141 /* Error occured during protocol */
1142 silc_protocol_free(protocol);
1143 sock->protocol = NULL;
1145 silc_packet_context_free(ctx->packet);
1147 silc_ske_free(ctx->ske);
1149 silc_free(ctx->dest_id);
1152 sock->protocol = NULL;
1153 silc_task_unregister_by_callback(server->timeout_queue,
1154 silc_server_failure_callback);
1155 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1156 "Authentication failed");
1157 server->stat.auth_failures++;
1161 sock->type = ctx->conn_type;
1162 switch(sock->type) {
1163 case SILC_SOCKET_TYPE_CLIENT:
1165 SilcClientEntry client;
1167 SILC_LOG_DEBUG(("Remote host is client"));
1168 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1171 /* Add the client to the client ID cache. The nickname and Client ID
1172 and other information is created after we have received NEW_CLIENT
1173 packet from client. */
1174 client = silc_idlist_add_client(server->local_list,
1175 NULL, 0, NULL, NULL, NULL, NULL, sock);
1177 SILC_LOG_ERROR(("Could not add new client to cache"));
1178 silc_free(sock->user_data);
1183 server->stat.my_clients++;
1184 server->stat.clients++;
1185 if (server->server_type == SILC_ROUTER)
1186 server->stat.cell_clients++;
1188 id_entry = (void *)client;
1191 case SILC_SOCKET_TYPE_SERVER:
1192 case SILC_SOCKET_TYPE_ROUTER:
1194 SilcServerEntry new_server;
1196 SILC_LOG_DEBUG(("Remote host is %s",
1197 sock->type == SILC_SOCKET_TYPE_SERVER ?
1198 "server" : "router"));
1199 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1200 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1201 "server" : "router"));
1203 /* Add the server into server cache. The server name and Server ID
1204 is updated after we have received NEW_SERVER packet from the
1205 server. We mark ourselves as router for this server if we really
1208 silc_idlist_add_server(server->local_list, NULL,
1209 sock->type == SILC_SOCKET_TYPE_SERVER ?
1210 SILC_SERVER : SILC_ROUTER, NULL,
1211 sock->type == SILC_SOCKET_TYPE_SERVER ?
1212 server->id_entry : NULL, sock);
1214 SILC_LOG_ERROR(("Could not add new server to cache"));
1215 silc_free(sock->user_data);
1220 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1221 server->stat.my_servers++;
1223 server->stat.my_routers++;
1224 server->stat.servers++;
1226 id_entry = (void *)new_server;
1228 /* There is connection to other server now, if it is router then
1229 we will have connection to outside world. If we are router but
1230 normal server connected to us then we will remain standalone,
1231 if we are standlone. */
1232 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1233 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1234 server->standalone = FALSE;
1235 if (!server->id_entry->router) {
1236 server->id_entry->router = id_entry;
1237 server->router = id_entry;
1246 /* Add the common data structure to the ID entry. */
1248 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1250 /* Add to sockets internal pointer for fast referencing */
1251 silc_free(sock->user_data);
1252 sock->user_data = id_entry;
1254 /* Connection has been fully established now. Everything is ok. */
1255 SILC_LOG_DEBUG(("New connection authenticated"));
1257 /* Perform keepalive. The `hb_context' will be freed automatically
1258 when finally calling the silc_socket_free function. XXX hardcoded
1260 hb_context = silc_calloc(1, sizeof(*hb_context));
1261 hb_context->server = server;
1262 silc_socket_set_heartbeat(sock, 600, hb_context,
1263 silc_server_perform_heartbeat,
1264 server->timeout_queue);
1266 silc_task_unregister_by_callback(server->timeout_queue,
1267 silc_server_failure_callback);
1268 silc_protocol_free(protocol);
1270 silc_packet_context_free(ctx->packet);
1272 silc_ske_free(ctx->ske);
1274 silc_free(ctx->dest_id);
1276 sock->protocol = NULL;
1279 /* This function is used to read packets from network and send packets to
1280 network. This is usually a generic task. */
1282 SILC_TASK_CALLBACK(silc_server_packet_process)
1284 SilcServer server = (SilcServer)context;
1285 SilcSocketConnection sock = server->sockets[fd];
1286 SilcIDListData idata;
1287 SilcCipher cipher = NULL;
1288 SilcHmac hmac = NULL;
1294 SILC_LOG_DEBUG(("Processing packet"));
1296 /* Packet sending */
1298 if (type == SILC_TASK_WRITE) {
1299 /* Do not send data to disconnected connection */
1300 if (SILC_IS_DISCONNECTED(sock))
1303 server->stat.packets_sent++;
1305 if (sock->outbuf->data - sock->outbuf->head)
1306 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1308 /* Send the packet */
1309 ret = silc_packet_send(sock, TRUE);
1311 /* If returned -2 could not write to connection now, will do
1319 /* The packet has been sent and now it is time to set the connection
1320 back to only for input. When there is again some outgoing data
1321 available for this connection it will be set for output as well.
1322 This call clears the output setting and sets it only for input. */
1323 SILC_SET_CONNECTION_FOR_INPUT(fd);
1324 SILC_UNSET_OUTBUF_PENDING(sock);
1326 silc_buffer_clear(sock->outbuf);
1330 /* Packet receiving */
1332 /* Read some data from connection */
1333 ret = silc_packet_receive(sock);
1339 SILC_LOG_DEBUG(("Read EOF"));
1341 /* If connection is disconnecting already we will finally
1342 close the connection */
1343 if (SILC_IS_DISCONNECTING(sock)) {
1344 if (sock->user_data)
1345 silc_server_free_sock_user_data(server, sock);
1346 silc_server_close_connection(server, sock);
1350 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1351 SILC_SET_DISCONNECTING(sock);
1353 /* If the closed connection was our primary router connection the
1354 start re-connecting phase. */
1355 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1356 sock == server->router->connection)
1357 silc_task_register(server->timeout_queue, 0,
1358 silc_server_connect_to_router,
1361 SILC_TASK_PRI_NORMAL);
1363 if (sock->user_data)
1364 silc_server_free_sock_user_data(server, sock);
1365 silc_server_close_connection(server, sock);
1369 /* If connection is disconnecting or disconnected we will ignore
1371 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1372 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1376 server->stat.packets_received++;
1378 /* Get keys and stuff from ID entry */
1379 idata = (SilcIDListData)sock->user_data;
1381 idata->last_receive = time(NULL);
1382 cipher = idata->receive_key;
1383 hmac = idata->hmac_receive;
1386 /* Process the packet. This will call the parser that will then
1387 decrypt and parse the packet. */
1388 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1392 /* Callback function that the silc_packet_decrypt will call to make the
1393 decision whether the packet is normal or special packet. We will
1394 return TRUE if it is normal and FALSE if it is special */
1396 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1398 SilcPacketContext *packet,
1401 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1402 SilcServer server = (SilcServer)parse_ctx->context;
1404 /* Packet is normal packet, if:
1406 1) packet is private message packet and does not have private key set
1407 2) is other packet than channel message packet
1408 3) is channel message packet and remote is router and we are router
1410 all other packets are special packets
1413 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1414 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1417 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1418 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1419 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1420 server->server_type == SILC_ROUTER))
1426 /* Parses whole packet, received earlier. */
1428 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1430 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1431 SilcServer server = (SilcServer)parse_ctx->context;
1432 SilcSocketConnection sock = parse_ctx->sock;
1433 SilcPacketContext *packet = parse_ctx->packet;
1434 SilcIDListData idata = (SilcIDListData)sock->user_data;
1437 SILC_LOG_DEBUG(("Start"));
1439 /* Decrypt the received packet */
1440 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1441 idata ? idata->hmac_receive : NULL,
1442 packet->buffer, packet,
1443 silc_server_packet_decrypt_check, parse_ctx);
1448 /* Parse the packet. Packet type is returned. */
1449 ret = silc_packet_parse(packet);
1451 /* Parse the packet header in special way as this is "special"
1453 ret = silc_packet_parse_special(packet);
1456 if (ret == SILC_PACKET_NONE)
1459 /* Check that the the current client ID is same as in the client's packet. */
1460 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1461 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1462 if (client && client->id) {
1463 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1464 packet->src_id_type);
1465 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1473 if (server->server_type == SILC_ROUTER) {
1474 /* Route the packet if it is not destined to us. Other ID types but
1475 server are handled separately after processing them. */
1476 if (packet->dst_id_type == SILC_ID_SERVER &&
1477 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1478 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1480 /* Route the packet to fastest route for the destination ID */
1481 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1482 packet->dst_id_type);
1485 silc_server_packet_route(server,
1486 silc_server_route_get(server, id,
1487 packet->dst_id_type),
1493 /* Broadcast packet if it is marked as broadcast packet and it is
1494 originated from router and we are router. */
1495 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1496 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1497 silc_server_packet_broadcast(server, server->router->connection, packet);
1501 /* Parse the incoming packet type */
1502 silc_server_packet_parse_type(server, sock, packet);
1505 /* silc_buffer_clear(sock->inbuf); */
1506 silc_packet_context_free(packet);
1507 silc_free(parse_ctx);
1510 /* Parser callback called by silc_packet_receive_process. This merely
1511 registers timeout that will handle the actual parsing when appropriate. */
1513 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1515 SilcServer server = (SilcServer)parser_context->context;
1516 SilcSocketConnection sock = parser_context->sock;
1518 switch (sock->type) {
1519 case SILC_SOCKET_TYPE_UNKNOWN:
1520 /* Parse the packet with timeout */
1521 silc_task_register(server->timeout_queue, sock->sock,
1522 silc_server_packet_parse_real,
1523 (void *)parser_context, 0, 100000,
1525 SILC_TASK_PRI_NORMAL);
1527 case SILC_SOCKET_TYPE_CLIENT:
1528 /* Parse the packet with timeout (unless protocol is active) */
1529 silc_task_register(server->timeout_queue, sock->sock,
1530 silc_server_packet_parse_real,
1531 (void *)parser_context, 0,
1532 (sock->protocol ? 1 : 100000),
1534 SILC_TASK_PRI_NORMAL);
1536 case SILC_SOCKET_TYPE_SERVER:
1537 case SILC_SOCKET_TYPE_ROUTER:
1538 /* Packets from servers are parsed as soon as possible */
1539 silc_task_register(server->timeout_queue, sock->sock,
1540 silc_server_packet_parse_real,
1541 (void *)parser_context, 0, 1,
1543 SILC_TASK_PRI_NORMAL);
1550 /* Parses the packet type and calls what ever routines the packet type
1551 requires. This is done for all incoming packets. */
1553 void silc_server_packet_parse_type(SilcServer server,
1554 SilcSocketConnection sock,
1555 SilcPacketContext *packet)
1557 SilcPacketType type = packet->type;
1559 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1561 /* Parse the packet type */
1563 case SILC_PACKET_DISCONNECT:
1564 SILC_LOG_DEBUG(("Disconnect packet"));
1565 if (packet->flags & SILC_PACKET_FLAG_LIST)
1569 case SILC_PACKET_SUCCESS:
1571 * Success received for something. For now we can have only
1572 * one protocol for connection executing at once hence this
1573 * success message is for whatever protocol is executing currently.
1575 SILC_LOG_DEBUG(("Success packet"));
1576 if (packet->flags & SILC_PACKET_FLAG_LIST)
1578 if (sock->protocol) {
1579 sock->protocol->execute(server->timeout_queue, 0,
1580 sock->protocol, sock->sock, 0, 0);
1584 case SILC_PACKET_FAILURE:
1586 * Failure received for something. For now we can have only
1587 * one protocol for connection executing at once hence this
1588 * failure message is for whatever protocol is executing currently.
1590 SILC_LOG_DEBUG(("Failure packet"));
1591 if (packet->flags & SILC_PACKET_FLAG_LIST)
1593 if (sock->protocol) {
1594 SilcServerFailureContext f;
1595 f = silc_calloc(1, sizeof(*f));
1599 /* We will wait 5 seconds to process this failure packet */
1600 silc_task_register(server->timeout_queue, sock->sock,
1601 silc_server_failure_callback, (void *)f, 5, 0,
1602 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1606 case SILC_PACKET_REJECT:
1607 SILC_LOG_DEBUG(("Reject packet"));
1608 if (packet->flags & SILC_PACKET_FLAG_LIST)
1613 case SILC_PACKET_NOTIFY:
1615 * Received notify packet. Server can receive notify packets from
1616 * router. Server then relays the notify messages to clients if needed.
1618 SILC_LOG_DEBUG(("Notify packet"));
1619 if (packet->flags & SILC_PACKET_FLAG_LIST)
1620 silc_server_notify_list(server, sock, packet);
1622 silc_server_notify(server, sock, packet);
1628 case SILC_PACKET_CHANNEL_MESSAGE:
1630 * Received channel message. Channel messages are special packets
1631 * (although probably most common ones) thus they are handled
1634 SILC_LOG_DEBUG(("Channel Message packet"));
1635 if (packet->flags & SILC_PACKET_FLAG_LIST)
1637 silc_server_channel_message(server, sock, packet);
1640 case SILC_PACKET_CHANNEL_KEY:
1642 * Received key for channel. As channels are created by the router
1643 * the keys are as well. We will distribute the key to all of our
1644 * locally connected clients on the particular channel. Router
1645 * never receives this channel and thus is ignored.
1647 SILC_LOG_DEBUG(("Channel Key packet"));
1648 if (packet->flags & SILC_PACKET_FLAG_LIST)
1650 silc_server_channel_key(server, sock, packet);
1656 case SILC_PACKET_COMMAND:
1658 * Recived command. Processes the command request and allocates the
1659 * command context and calls the command.
1661 SILC_LOG_DEBUG(("Command packet"));
1662 if (packet->flags & SILC_PACKET_FLAG_LIST)
1664 silc_server_command_process(server, sock, packet);
1667 case SILC_PACKET_COMMAND_REPLY:
1669 * Received command reply packet. Received command reply to command. It
1670 * may be reply to command sent by us or reply to command sent by client
1671 * that we've routed further.
1673 SILC_LOG_DEBUG(("Command Reply packet"));
1674 if (packet->flags & SILC_PACKET_FLAG_LIST)
1676 silc_server_command_reply(server, sock, packet);
1680 * Private Message packets
1682 case SILC_PACKET_PRIVATE_MESSAGE:
1684 * Received private message packet. The packet is coming from either
1687 SILC_LOG_DEBUG(("Private Message packet"));
1688 if (packet->flags & SILC_PACKET_FLAG_LIST)
1690 silc_server_private_message(server, sock, packet);
1693 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1695 * Private message key packet.
1697 if (packet->flags & SILC_PACKET_FLAG_LIST)
1699 silc_server_private_message_key(server, sock, packet);
1703 * Key Exchange protocol packets
1705 case SILC_PACKET_KEY_EXCHANGE:
1706 SILC_LOG_DEBUG(("KE packet"));
1707 if (packet->flags & SILC_PACKET_FLAG_LIST)
1710 if (sock->protocol && sock->protocol->protocol &&
1711 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1713 SilcServerKEInternalContext *proto_ctx =
1714 (SilcServerKEInternalContext *)sock->protocol->context;
1716 proto_ctx->packet = silc_packet_context_dup(packet);
1718 /* Let the protocol handle the packet */
1719 sock->protocol->execute(server->timeout_queue, 0,
1720 sock->protocol, sock->sock, 0, 100000);
1722 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1723 "protocol active, packet dropped."));
1725 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1729 case SILC_PACKET_KEY_EXCHANGE_1:
1730 SILC_LOG_DEBUG(("KE 1 packet"));
1731 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 if (sock->protocol && sock->protocol->protocol &&
1735 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1736 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1738 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1739 SilcServerRekeyInternalContext *proto_ctx =
1740 (SilcServerRekeyInternalContext *)sock->protocol->context;
1742 if (proto_ctx->packet)
1743 silc_packet_context_free(proto_ctx->packet);
1745 proto_ctx->packet = silc_packet_context_dup(packet);
1747 /* Let the protocol handle the packet */
1748 sock->protocol->execute(server->timeout_queue, 0,
1749 sock->protocol, sock->sock, 0, 0);
1751 SilcServerKEInternalContext *proto_ctx =
1752 (SilcServerKEInternalContext *)sock->protocol->context;
1754 if (proto_ctx->packet)
1755 silc_packet_context_free(proto_ctx->packet);
1757 proto_ctx->packet = silc_packet_context_dup(packet);
1758 proto_ctx->dest_id_type = packet->src_id_type;
1759 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1760 packet->src_id_type);
1761 if (!proto_ctx->dest_id)
1764 /* Let the protocol handle the packet */
1765 sock->protocol->execute(server->timeout_queue, 0,
1766 sock->protocol, sock->sock,
1770 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1771 "protocol active, packet dropped."));
1775 case SILC_PACKET_KEY_EXCHANGE_2:
1776 SILC_LOG_DEBUG(("KE 2 packet"));
1777 if (packet->flags & SILC_PACKET_FLAG_LIST)
1780 if (sock->protocol && sock->protocol->protocol &&
1781 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1782 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1784 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1785 SilcServerRekeyInternalContext *proto_ctx =
1786 (SilcServerRekeyInternalContext *)sock->protocol->context;
1788 if (proto_ctx->packet)
1789 silc_packet_context_free(proto_ctx->packet);
1791 proto_ctx->packet = silc_packet_context_dup(packet);
1793 /* Let the protocol handle the packet */
1794 sock->protocol->execute(server->timeout_queue, 0,
1795 sock->protocol, sock->sock, 0, 0);
1797 SilcServerKEInternalContext *proto_ctx =
1798 (SilcServerKEInternalContext *)sock->protocol->context;
1800 if (proto_ctx->packet)
1801 silc_packet_context_free(proto_ctx->packet);
1803 proto_ctx->packet = silc_packet_context_dup(packet);
1804 proto_ctx->dest_id_type = packet->src_id_type;
1805 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1806 packet->src_id_type);
1807 if (!proto_ctx->dest_id)
1810 /* Let the protocol handle the packet */
1811 sock->protocol->execute(server->timeout_queue, 0,
1812 sock->protocol, sock->sock,
1816 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1817 "protocol active, packet dropped."));
1821 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1823 * Connection authentication request packet. When we receive this packet
1824 * we will send to the other end information about our mandatory
1825 * authentication method for the connection. This packet maybe received
1828 SILC_LOG_DEBUG(("Connection authentication request packet"));
1829 if (packet->flags & SILC_PACKET_FLAG_LIST)
1831 silc_server_connection_auth_request(server, sock, packet);
1835 * Connection Authentication protocol packets
1837 case SILC_PACKET_CONNECTION_AUTH:
1838 /* Start of the authentication protocol. We receive here the
1839 authentication data and will verify it. */
1840 SILC_LOG_DEBUG(("Connection auth packet"));
1841 if (packet->flags & SILC_PACKET_FLAG_LIST)
1844 if (sock->protocol && sock->protocol->protocol->type
1845 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1847 SilcServerConnAuthInternalContext *proto_ctx =
1848 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1850 proto_ctx->packet = silc_packet_context_dup(packet);
1852 /* Let the protocol handle the packet */
1853 sock->protocol->execute(server->timeout_queue, 0,
1854 sock->protocol, sock->sock, 0, 0);
1856 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1857 "protocol active, packet dropped."));
1861 case SILC_PACKET_NEW_ID:
1863 * Received New ID packet. This includes some new ID that has been
1864 * created. It may be for client, server or channel. This is the way
1865 * to distribute information about new registered entities in the
1868 SILC_LOG_DEBUG(("New ID packet"));
1869 if (packet->flags & SILC_PACKET_FLAG_LIST)
1870 silc_server_new_id_list(server, sock, packet);
1872 silc_server_new_id(server, sock, packet);
1875 case SILC_PACKET_NEW_CLIENT:
1877 * Received new client packet. This includes client information that
1878 * we will use to create initial client ID. After creating new
1879 * ID we will send it to the client.
1881 SILC_LOG_DEBUG(("New Client packet"));
1882 if (packet->flags & SILC_PACKET_FLAG_LIST)
1884 silc_server_new_client(server, sock, packet);
1887 case SILC_PACKET_NEW_SERVER:
1889 * Received new server packet. This includes Server ID and some other
1890 * information that we may save. This is received after server has
1893 SILC_LOG_DEBUG(("New Server packet"));
1894 if (packet->flags & SILC_PACKET_FLAG_LIST)
1896 silc_server_new_server(server, sock, packet);
1899 case SILC_PACKET_NEW_CHANNEL:
1901 * Received new channel packet. Information about new channel in the
1902 * network are distributed using this packet.
1904 SILC_LOG_DEBUG(("New Channel packet"));
1905 if (packet->flags & SILC_PACKET_FLAG_LIST)
1906 silc_server_new_channel_list(server, sock, packet);
1908 silc_server_new_channel(server, sock, packet);
1911 case SILC_PACKET_HEARTBEAT:
1913 * Received heartbeat.
1915 SILC_LOG_DEBUG(("Heartbeat packet"));
1916 if (packet->flags & SILC_PACKET_FLAG_LIST)
1920 case SILC_PACKET_KEY_AGREEMENT:
1922 * Received heartbeat.
1924 SILC_LOG_DEBUG(("Key agreement packet"));
1925 if (packet->flags & SILC_PACKET_FLAG_LIST)
1927 silc_server_key_agreement(server, sock, packet);
1930 case SILC_PACKET_REKEY:
1932 * Received re-key packet. The sender wants to regenerate the session
1935 SILC_LOG_DEBUG(("Re-key packet"));
1936 if (packet->flags & SILC_PACKET_FLAG_LIST)
1938 silc_server_rekey(server, sock, packet);
1941 case SILC_PACKET_REKEY_DONE:
1943 * The re-key is done.
1945 SILC_LOG_DEBUG(("Re-key done packet"));
1946 if (packet->flags & SILC_PACKET_FLAG_LIST)
1949 if (sock->protocol && sock->protocol->protocol &&
1950 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1952 SilcServerRekeyInternalContext *proto_ctx =
1953 (SilcServerRekeyInternalContext *)sock->protocol->context;
1955 if (proto_ctx->packet)
1956 silc_packet_context_free(proto_ctx->packet);
1958 proto_ctx->packet = silc_packet_context_dup(packet);
1960 /* Let the protocol handle the packet */
1961 sock->protocol->execute(server->timeout_queue, 0,
1962 sock->protocol, sock->sock, 0, 0);
1964 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1965 "protocol active, packet dropped."));
1970 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1976 /* Creates connection to a remote router. */
1978 void silc_server_create_connection(SilcServer server,
1979 char *remote_host, uint32 port)
1981 SilcServerConnection sconn;
1983 /* Allocate connection object for hold connection specific stuff. */
1984 sconn = silc_calloc(1, sizeof(*sconn));
1985 sconn->server = server;
1986 sconn->remote_host = strdup(remote_host);
1987 sconn->remote_port = port;
1989 silc_task_register(server->timeout_queue, 0,
1990 silc_server_connect_router,
1991 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1992 SILC_TASK_PRI_NORMAL);
1995 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1997 silc_socket_free((SilcSocketConnection)context);
2000 /* Closes connection to socket connection */
2002 void silc_server_close_connection(SilcServer server,
2003 SilcSocketConnection sock)
2005 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2007 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2008 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2009 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2010 "Router"), sock->sock));
2012 /* We won't listen for this connection anymore */
2013 silc_schedule_unset_listen_fd(sock->sock);
2015 /* Unregister all tasks */
2016 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2017 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2019 /* Close the actual connection */
2020 silc_net_close_connection(sock->sock);
2021 server->sockets[sock->sock] = NULL;
2023 silc_task_register(server->timeout_queue, 0,
2024 silc_server_close_connection_final,
2025 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2026 SILC_TASK_PRI_NORMAL);
2029 /* Sends disconnect message to remote connection and disconnects the
2032 void silc_server_disconnect_remote(SilcServer server,
2033 SilcSocketConnection sock,
2034 const char *fmt, ...)
2037 unsigned char buf[4096];
2042 memset(buf, 0, sizeof(buf));
2044 vsprintf(buf, fmt, ap);
2047 SILC_LOG_DEBUG(("Disconnecting remote host"));
2049 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2051 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2052 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2053 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2056 /* Notify remote end that the conversation is over. The notify message
2057 is tried to be sent immediately. */
2058 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2059 buf, strlen(buf), TRUE);
2061 /* Mark the connection to be disconnected */
2062 SILC_SET_DISCONNECTED(sock);
2063 silc_server_close_connection(server, sock);
2068 SilcClientEntry client;
2069 } *FreeClientInternal;
2071 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2073 FreeClientInternal i = (FreeClientInternal)context;
2075 silc_idlist_del_data(i->client);
2076 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2080 /* Frees client data and notifies about client's signoff. */
2082 void silc_server_free_client_data(SilcServer server,
2083 SilcSocketConnection sock,
2084 SilcClientEntry client,
2088 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2090 /* If there is pending outgoing data for the client then purge it
2091 to the network before removing the client entry. */
2092 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2093 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2094 server->stat.packets_sent++;
2096 if (sock->outbuf->data - sock->outbuf->head)
2097 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2099 silc_packet_send(sock, TRUE);
2101 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2102 SILC_UNSET_OUTBUF_PENDING(sock);
2103 silc_buffer_clear(sock->outbuf);
2106 /* Send SIGNOFF notify to routers. */
2107 if (notify && !server->standalone && server->router)
2108 silc_server_send_notify_signoff(server, server->router->connection,
2109 server->server_type == SILC_SERVER ?
2110 FALSE : TRUE, client->id,
2111 SILC_ID_CLIENT_LEN, signoff);
2113 /* Remove client from all channels */
2115 silc_server_remove_from_channels(server, NULL, client,
2116 TRUE, signoff, TRUE);
2118 silc_server_remove_from_channels(server, NULL, client,
2119 FALSE, NULL, FALSE);
2121 /* We will not delete the client entry right away. We will take it
2122 into history (for WHOWAS command) for 5 minutes */
2125 silc_task_register(server->timeout_queue, 0,
2126 silc_server_free_client_data_timeout,
2128 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2129 client->data.registered = FALSE;
2131 /* Free the client entry and everything in it */
2132 server->stat.my_clients--;
2133 server->stat.clients--;
2134 if (server->server_type == SILC_ROUTER)
2135 server->stat.cell_clients--;
2138 /* Frees user_data pointer from socket connection object. This also sends
2139 appropriate notify packets to the network to inform about leaving
2142 void silc_server_free_sock_user_data(SilcServer server,
2143 SilcSocketConnection sock)
2145 SILC_LOG_DEBUG(("Start"));
2147 switch(sock->type) {
2148 case SILC_SOCKET_TYPE_CLIENT:
2150 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2151 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2154 case SILC_SOCKET_TYPE_SERVER:
2155 case SILC_SOCKET_TYPE_ROUTER:
2157 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2159 /* Free all client entries that this server owns as they will
2160 become invalid now as well. */
2161 silc_server_remove_clients_by_server(server, user_data, TRUE);
2163 /* If this was our primary router connection then we're lost to
2164 the outside world. */
2165 if (server->router == user_data) {
2166 server->id_entry->router = NULL;
2167 server->router = NULL;
2168 server->standalone = TRUE;
2171 /* Free the server entry */
2172 silc_idlist_del_data(user_data);
2173 silc_idlist_del_server(server->local_list, user_data);
2174 server->stat.my_servers--;
2175 server->stat.servers--;
2176 if (server->server_type == SILC_ROUTER)
2177 server->stat.cell_servers--;
2182 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2184 silc_idlist_del_data(user_data);
2185 silc_free(user_data);
2190 sock->user_data = NULL;
2193 /* This function is used to remove all client entries by the server `entry'.
2194 This is called when the connection is lost to the server. In this case
2195 we must invalidate all the client entries owned by the server `entry'.
2196 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2197 distributed to our local clients. */
2199 int silc_server_remove_clients_by_server(SilcServer server,
2200 SilcServerEntry entry,
2203 SilcIDCacheList list = NULL;
2204 SilcIDCacheEntry id_cache = NULL;
2205 SilcClientEntry client = NULL;
2207 SilcClientEntry *clients = NULL;
2208 uint32 clients_c = 0;
2209 unsigned char **argv = NULL;
2210 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2213 SILC_LOG_DEBUG(("Start"));
2215 if (server_signoff) {
2216 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2217 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2218 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2219 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2220 argv[argc] = idp->data;
2221 argv_lens[argc] = idp->len;
2222 argv_types[argc] = argc + 1;
2224 silc_buffer_free(idp);
2227 if (silc_idcache_find_by_id(server->local_list->clients,
2228 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2230 if (silc_idcache_list_first(list, &id_cache)) {
2232 client = (SilcClientEntry)id_cache->context;
2233 if (client->data.registered == FALSE) {
2234 if (!silc_idcache_list_next(list, &id_cache))
2240 if (client->router != entry) {
2241 if (server_signoff && client->connection) {
2242 clients = silc_realloc(clients,
2243 sizeof(*clients) * (clients_c + 1));
2244 clients[clients_c] = client;
2248 if (!silc_idcache_list_next(list, &id_cache))
2254 if (server_signoff) {
2255 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2256 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2257 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2259 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2261 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2262 memcpy(argv[argc], idp->data, idp->len);
2263 argv_lens[argc] = idp->len;
2264 argv_types[argc] = argc + 1;
2266 silc_buffer_free(idp);
2269 /* Remove the client entry */
2270 silc_server_remove_from_channels(server, NULL, client, FALSE,
2272 silc_idlist_del_client(server->local_list, client);
2274 if (!silc_idcache_list_next(list, &id_cache))
2278 silc_idcache_list_free(list);
2281 if (silc_idcache_find_by_id(server->global_list->clients,
2282 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2284 if (silc_idcache_list_first(list, &id_cache)) {
2286 client = (SilcClientEntry)id_cache->context;
2287 if (client->data.registered == FALSE) {
2288 if (!silc_idcache_list_next(list, &id_cache))
2294 if (client->router != entry) {
2295 if (server_signoff && client->connection) {
2296 clients = silc_realloc(clients,
2297 sizeof(*clients) * (clients_c + 1));
2298 clients[clients_c] = client;
2302 if (!silc_idcache_list_next(list, &id_cache))
2308 if (server_signoff) {
2309 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2310 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2311 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2313 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2315 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2316 memcpy(argv[argc], idp->data, idp->len);
2317 argv_lens[argc] = idp->len;
2318 argv_types[argc] = argc + 1;
2320 silc_buffer_free(idp);
2323 /* Remove the client entry */
2324 silc_server_remove_from_channels(server, NULL, client, FALSE,
2326 silc_idlist_del_client(server->global_list, client);
2328 if (!silc_idcache_list_next(list, &id_cache))
2332 silc_idcache_list_free(list);
2335 /* Send the SERVER_SIGNOFF notify */
2336 if (server_signoff) {
2339 /* Send SERVER_SIGNOFF notify to our primary router */
2340 if (!server->standalone && server->router) {
2341 args = silc_argument_payload_encode(1, argv, argv_lens,
2343 silc_server_send_notify_args(server,
2344 server->router->connection,
2345 server->server_type ==
2346 SILC_SERVER ? FALSE : TRUE,
2347 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2349 silc_buffer_free(args);
2352 args = silc_argument_payload_encode(argc, argv, argv_lens,
2354 /* Send to local clients */
2355 for (i = 0; i < clients_c; i++) {
2356 silc_server_send_notify_args(server, clients[i]->connection,
2357 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2362 silc_buffer_free(args);
2364 silc_free(argv_lens);
2365 silc_free(argv_types);
2371 /* Checks whether given channel has global users. If it does this returns
2372 TRUE and FALSE if there is only locally connected clients on the channel. */
2374 int silc_server_channel_has_global(SilcChannelEntry channel)
2376 SilcChannelClientEntry chl;
2378 silc_list_start(channel->user_list);
2379 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2380 if (chl->client->router)
2387 /* Checks whether given channel has locally connected users. If it does this
2388 returns TRUE and FALSE if there is not one locally connected client. */
2390 int silc_server_channel_has_local(SilcChannelEntry channel)
2392 SilcChannelClientEntry chl;
2394 silc_list_start(channel->user_list);
2395 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2396 if (!chl->client->router)
2403 /* Removes client from all channels it has joined. This is used when client
2404 connection is disconnected. If the client on a channel is last, the
2405 channel is removed as well. This sends the SIGNOFF notify types. */
2407 void silc_server_remove_from_channels(SilcServer server,
2408 SilcSocketConnection sock,
2409 SilcClientEntry client,
2411 char *signoff_message,
2414 SilcChannelEntry channel;
2415 SilcChannelClientEntry chl;
2418 SILC_LOG_DEBUG(("Start"));
2420 if (!client || !client->id)
2423 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2425 /* Remove the client from all channels. The client is removed from
2426 the channels' user list. */
2427 silc_list_start(client->channels);
2428 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2429 channel = chl->channel;
2431 /* Remove channel from client's channel list */
2432 silc_list_del(client->channels, chl);
2434 /* Remove channel if there is no users anymore */
2435 if (server->server_type == SILC_ROUTER &&
2436 silc_list_count(channel->user_list) < 2) {
2437 server->stat.my_channels--;
2440 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2442 if (channel->founder_key) {
2443 /* The founder auth data exists, do not remove the channel entry */
2444 SilcChannelClientEntry chl2;
2448 silc_list_start(channel->user_list);
2449 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2450 silc_list_del(chl2->client->channels, chl2);
2451 silc_list_del(channel->user_list, chl2);
2457 if (!silc_idlist_del_channel(server->local_list, channel))
2458 silc_idlist_del_channel(server->global_list, channel);
2462 /* Remove client from channel's client list */
2463 silc_list_del(channel->user_list, chl);
2465 server->stat.my_chanclients--;
2467 /* If there is no global users on the channel anymore mark the channel
2468 as local channel. */
2469 if (server->server_type == SILC_SERVER &&
2470 !silc_server_channel_has_global(channel))
2471 channel->global_users = FALSE;
2473 /* If there is not at least one local user on the channel then we don't
2474 need the channel entry anymore, we can remove it safely. */
2475 if (server->server_type == SILC_SERVER &&
2476 !silc_server_channel_has_local(channel)) {
2477 /* Notify about leaving client if this channel has global users. */
2478 if (notify && channel->global_users)
2479 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2480 SILC_NOTIFY_TYPE_SIGNOFF,
2481 signoff_message ? 2 : 1,
2482 clidp->data, clidp->len,
2483 signoff_message, signoff_message ?
2484 strlen(signoff_message) : 0);
2486 server->stat.my_channels--;
2489 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2491 if (channel->founder_key) {
2492 /* The founder auth data exists, do not remove the channel entry */
2493 SilcChannelClientEntry chl2;
2497 silc_list_start(channel->user_list);
2498 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2499 silc_list_del(chl2->client->channels, chl2);
2500 silc_list_del(channel->user_list, chl2);
2506 if (!silc_idlist_del_channel(server->local_list, channel))
2507 silc_idlist_del_channel(server->global_list, channel);
2511 /* Send notify to channel about client leaving SILC and thus
2512 the entire channel. */
2514 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2515 SILC_NOTIFY_TYPE_SIGNOFF,
2516 signoff_message ? 2 : 1,
2517 clidp->data, clidp->len,
2518 signoff_message, signoff_message ?
2519 strlen(signoff_message) : 0);
2521 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2522 /* Re-generate channel key */
2523 silc_server_create_channel_key(server, channel, 0);
2525 /* Send the channel key to the channel. The key of course is not sent
2526 to the client who was removed from the channel. */
2527 silc_server_send_channel_key(server, client->connection, channel,
2528 server->server_type == SILC_ROUTER ?
2529 FALSE : !server->standalone);
2533 silc_buffer_free(clidp);
2536 /* Removes client from one channel. This is used for example when client
2537 calls LEAVE command to remove itself from the channel. Returns TRUE
2538 if channel still exists and FALSE if the channel is removed when
2539 last client leaves the channel. If `notify' is FALSE notify messages
2542 int silc_server_remove_from_one_channel(SilcServer server,
2543 SilcSocketConnection sock,
2544 SilcChannelEntry channel,
2545 SilcClientEntry client,
2548 SilcChannelEntry ch;
2549 SilcChannelClientEntry chl;
2552 SILC_LOG_DEBUG(("Start"));
2554 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2556 /* Remove the client from the channel. The client is removed from
2557 the channel's user list. */
2558 silc_list_start(client->channels);
2559 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2560 if (chl->channel != channel)
2565 /* Remove channel from client's channel list */
2566 silc_list_del(client->channels, chl);
2568 /* Remove channel if there is no users anymore */
2569 if (server->server_type == SILC_ROUTER &&
2570 silc_list_count(channel->user_list) < 2) {
2572 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2573 if (!silc_idlist_del_channel(server->local_list, channel))
2574 silc_idlist_del_channel(server->global_list, channel);
2575 silc_buffer_free(clidp);
2576 server->stat.my_channels--;
2580 /* Remove client from channel's client list */
2581 silc_list_del(channel->user_list, chl);
2583 server->stat.my_chanclients--;
2585 /* If there is no global users on the channel anymore mark the channel
2586 as local channel. */
2587 if (server->server_type == SILC_SERVER &&
2588 !silc_server_channel_has_global(channel))
2589 channel->global_users = FALSE;
2591 /* If there is not at least one local user on the channel then we don't
2592 need the channel entry anymore, we can remove it safely. */
2593 if (server->server_type == SILC_SERVER &&
2594 !silc_server_channel_has_local(channel)) {
2595 /* Notify about leaving client if this channel has global users. */
2596 if (notify && channel->global_users)
2597 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2598 SILC_NOTIFY_TYPE_LEAVE, 1,
2599 clidp->data, clidp->len);
2601 server->stat.my_channels--;
2602 silc_buffer_free(clidp);
2605 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2607 if (channel->founder_key) {
2608 /* The founder auth data exists, do not remove the channel entry */
2609 SilcChannelClientEntry chl2;
2613 silc_list_start(channel->user_list);
2614 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2615 silc_list_del(chl2->client->channels, chl2);
2616 silc_list_del(channel->user_list, chl2);
2622 if (!silc_idlist_del_channel(server->local_list, channel))
2623 silc_idlist_del_channel(server->global_list, channel);
2627 /* Send notify to channel about client leaving the channel */
2629 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2630 SILC_NOTIFY_TYPE_LEAVE, 1,
2631 clidp->data, clidp->len);
2635 silc_buffer_free(clidp);
2639 /* Returns TRUE if the given client is on the channel. FALSE if not.
2640 This works because we assure that the user list on the channel is
2641 always in up to date thus we can only check the channel list from
2642 `client' which is faster than checking the user list from `channel'. */
2644 int silc_server_client_on_channel(SilcClientEntry client,
2645 SilcChannelEntry channel)
2647 SilcChannelClientEntry chl;
2649 if (!client || !channel)
2652 silc_list_start(client->channels);
2653 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2654 if (chl->channel == channel)
2660 /* Timeout callback. This is called if connection is idle or for some
2661 other reason is not responding within some period of time. This
2662 disconnects the remote end. */
2664 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2666 SilcServer server = (SilcServer)context;
2667 SilcSocketConnection sock = server->sockets[fd];
2672 if (sock->user_data)
2673 silc_server_free_sock_user_data(server, sock);
2675 silc_server_disconnect_remote(server, sock,
2676 "Server closed connection: "
2677 "Connection timeout");
2680 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2681 function may be used only by router. In real SILC network all channels
2682 are created by routers thus this function is never used by normal
2685 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2686 SilcServerID *router_id,
2692 SilcChannelID *channel_id;
2693 SilcChannelEntry entry;
2697 SILC_LOG_DEBUG(("Creating new channel"));
2700 cipher = "aes-256-cbc";
2702 hmac = "hmac-sha1-96";
2704 /* Allocate cipher */
2705 if (!silc_cipher_alloc(cipher, &key))
2709 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2710 silc_cipher_free(key);
2714 channel_name = strdup(channel_name);
2716 /* Create the channel */
2717 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2718 entry = silc_idlist_add_channel(server->local_list, channel_name,
2719 SILC_CHANNEL_MODE_NONE, channel_id,
2720 NULL, key, newhmac);
2722 silc_free(channel_name);
2726 entry->cipher = strdup(cipher);
2727 entry->hmac_name = strdup(hmac);
2729 /* Now create the actual key material */
2730 silc_server_create_channel_key(server, entry,
2731 silc_cipher_get_key_len(key) / 8);
2733 /* Notify other routers about the new channel. We send the packet
2734 to our primary route. */
2735 if (broadcast && server->standalone == FALSE)
2736 silc_server_send_new_channel(server, server->router->connection, TRUE,
2737 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2740 server->stat.my_channels++;
2745 /* Same as above but creates the channel with Channel ID `channel_id. */
2748 silc_server_create_new_channel_with_id(SilcServer server,
2752 SilcChannelID *channel_id,
2755 SilcChannelEntry entry;
2759 SILC_LOG_DEBUG(("Creating new channel"));
2762 cipher = "aes-256-cbc";
2764 hmac = "hmac-sha1-96";
2766 /* Allocate cipher */
2767 if (!silc_cipher_alloc(cipher, &key))
2771 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2772 silc_cipher_free(key);
2776 channel_name = strdup(channel_name);
2778 /* Create the channel */
2779 entry = silc_idlist_add_channel(server->local_list, channel_name,
2780 SILC_CHANNEL_MODE_NONE, channel_id,
2781 NULL, key, newhmac);
2783 silc_free(channel_name);
2787 /* Now create the actual key material */
2788 silc_server_create_channel_key(server, entry,
2789 silc_cipher_get_key_len(key) / 8);
2791 /* Notify other routers about the new channel. We send the packet
2792 to our primary route. */
2793 if (broadcast && server->standalone == FALSE)
2794 silc_server_send_new_channel(server, server->router->connection, TRUE,
2795 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2798 server->stat.my_channels++;
2803 /* Channel's key re-key timeout callback. */
2805 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2807 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2808 SilcServer server = (SilcServer)rekey->context;
2810 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2811 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2813 silc_task_register(server->timeout_queue, 0,
2814 silc_server_channel_key_rekey,
2815 (void *)rekey, 3600, 0,
2817 SILC_TASK_PRI_NORMAL);
2820 /* Generates new channel key. This is used to create the initial channel key
2821 but also to re-generate new key for channel. If `key_len' is provided
2822 it is the bytes of the key length. */
2824 void silc_server_create_channel_key(SilcServer server,
2825 SilcChannelEntry channel,
2829 unsigned char channel_key[32], hash[32];
2832 SILC_LOG_DEBUG(("Generating channel key"));
2834 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2835 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2839 if (!channel->channel_key)
2840 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2845 else if (channel->key_len)
2846 len = channel->key_len / 8;
2848 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2850 /* Create channel key */
2851 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2854 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2856 /* Remove old key if exists */
2858 memset(channel->key, 0, channel->key_len / 8);
2859 silc_free(channel->key);
2863 channel->key_len = len * 8;
2864 channel->key = silc_calloc(len, sizeof(*channel->key));
2865 memcpy(channel->key, channel_key, len);
2866 memset(channel_key, 0, sizeof(channel_key));
2868 /* Generate HMAC key from the channel key data and set it */
2870 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2871 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2872 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2873 memset(hash, 0, sizeof(hash));
2875 if (server->server_type == SILC_ROUTER) {
2876 if (!channel->rekey)
2877 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2878 channel->rekey->context = (void *)server;
2879 channel->rekey->channel = channel;
2880 channel->rekey->key_len = key_len;
2882 silc_task_unregister_by_callback(server->timeout_queue,
2883 silc_server_channel_key_rekey);
2884 silc_task_register(server->timeout_queue, 0,
2885 silc_server_channel_key_rekey,
2886 (void *)channel->rekey, 3600, 0,
2888 SILC_TASK_PRI_NORMAL);
2892 /* Saves the channel key found in the encoded `key_payload' buffer. This
2893 function is used when we receive Channel Key Payload and also when we're
2894 processing JOIN command reply. Returns entry to the channel. */
2896 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2897 SilcBuffer key_payload,
2898 SilcChannelEntry channel)
2900 SilcChannelKeyPayload payload = NULL;
2901 SilcChannelID *id = NULL;
2902 unsigned char *tmp, hash[32];
2906 SILC_LOG_DEBUG(("Start"));
2908 /* Decode channel key payload */
2909 payload = silc_channel_key_payload_parse(key_payload);
2911 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2916 /* Get the channel entry */
2919 /* Get channel ID */
2920 tmp = silc_channel_key_get_id(payload, &tmp_len);
2921 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2927 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2929 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2931 SILC_LOG_ERROR(("Received key for non-existent channel"));
2937 tmp = silc_channel_key_get_key(payload, &tmp_len);
2943 cipher = silc_channel_key_get_cipher(payload, NULL);
2949 /* Remove old key if exists */
2951 memset(channel->key, 0, channel->key_len / 8);
2952 silc_free(channel->key);
2953 silc_cipher_free(channel->channel_key);
2956 /* Create new cipher */
2957 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2962 if (channel->cipher)
2963 silc_free(channel->cipher);
2964 channel->cipher = strdup(cipher);
2967 channel->key_len = tmp_len * 8;
2968 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2969 memcpy(channel->key, tmp, tmp_len);
2970 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2972 /* Generate HMAC key from the channel key data and set it */
2974 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2975 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2976 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2978 memset(hash, 0, sizeof(hash));
2979 memset(tmp, 0, tmp_len);
2981 if (server->server_type == SILC_ROUTER) {
2982 if (!channel->rekey)
2983 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2984 channel->rekey->context = (void *)server;
2985 channel->rekey->channel = channel;
2987 silc_task_unregister_by_callback(server->timeout_queue,
2988 silc_server_channel_key_rekey);
2989 silc_task_register(server->timeout_queue, 0,
2990 silc_server_channel_key_rekey,
2991 (void *)channel->rekey, 3600, 0,
2993 SILC_TASK_PRI_NORMAL);
3000 silc_channel_key_payload_free(payload);
3005 /* Heartbeat callback. This function is set as argument for the
3006 silc_socket_set_heartbeat function. The library will call this function
3007 at the set time interval. */
3009 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3012 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3014 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3017 /* Send the heartbeat */
3018 silc_server_send_heartbeat(hb->server, sock);
3021 /* Returns assembled of all servers in the given ID list. The packet's
3022 form is dictated by the New ID payload. */
3024 static void silc_server_announce_get_servers(SilcServer server,
3026 SilcBuffer *servers)
3028 SilcIDCacheList list;
3029 SilcIDCacheEntry id_cache;
3030 SilcServerEntry entry;
3033 /* Go through all clients in the list */
3034 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3035 SILC_ID_SERVER, &list)) {
3036 if (silc_idcache_list_first(list, &id_cache)) {
3038 entry = (SilcServerEntry)id_cache->context;
3040 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3042 *servers = silc_buffer_realloc(*servers,
3044 (*servers)->truelen + idp->len :
3046 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3047 silc_buffer_put(*servers, idp->data, idp->len);
3048 silc_buffer_pull(*servers, idp->len);
3049 silc_buffer_free(idp);
3051 if (!silc_idcache_list_next(list, &id_cache))
3056 silc_idcache_list_free(list);
3060 /* This function is used by router to announce existing servers to our
3061 primary router when we've connected to it. */
3063 void silc_server_announce_servers(SilcServer server)
3065 SilcBuffer servers = NULL;
3067 SILC_LOG_DEBUG(("Announcing servers"));
3069 /* Get servers in local list */
3070 silc_server_announce_get_servers(server, server->local_list, &servers);
3072 /* Get servers in global list */
3073 silc_server_announce_get_servers(server, server->global_list, &servers);
3076 silc_buffer_push(servers, servers->data - servers->head);
3077 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3079 /* Send the packet */
3080 silc_server_packet_send(server, server->router->connection,
3081 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3082 servers->data, servers->len, TRUE);
3084 silc_buffer_free(servers);
3088 /* Returns assembled packet of all clients in the given ID list. The
3089 packet's form is dictated by the New ID Payload. */
3091 static void silc_server_announce_get_clients(SilcServer server,
3093 SilcBuffer *clients)
3095 SilcIDCacheList list;
3096 SilcIDCacheEntry id_cache;
3097 SilcClientEntry client;
3100 /* Go through all clients in the list */
3101 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3102 SILC_ID_CLIENT, &list)) {
3103 if (silc_idcache_list_first(list, &id_cache)) {
3105 client = (SilcClientEntry)id_cache->context;
3107 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3109 *clients = silc_buffer_realloc(*clients,
3111 (*clients)->truelen + idp->len :
3113 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3114 silc_buffer_put(*clients, idp->data, idp->len);
3115 silc_buffer_pull(*clients, idp->len);
3116 silc_buffer_free(idp);
3118 if (!silc_idcache_list_next(list, &id_cache))
3123 silc_idcache_list_free(list);
3127 /* This function is used to announce our existing clients to our router
3128 when we've connected to it. */
3130 void silc_server_announce_clients(SilcServer server)
3132 SilcBuffer clients = NULL;
3134 SILC_LOG_DEBUG(("Announcing clients"));
3136 /* Get clients in local list */
3137 silc_server_announce_get_clients(server, server->local_list,
3140 /* As router we announce our global list as well */
3141 if (server->server_type == SILC_ROUTER)
3142 silc_server_announce_get_clients(server, server->global_list,
3146 silc_buffer_push(clients, clients->data - clients->head);
3147 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3149 /* Send the packet */
3150 silc_server_packet_send(server, server->router->connection,
3151 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3152 clients->data, clients->len, TRUE);
3154 silc_buffer_free(clients);
3159 silc_server_announce_encode_join(uint32 argc, ...)
3164 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3167 /* Returns assembled packets for channel users of the `channel'. */
3169 void silc_server_announce_get_channel_users(SilcServer server,
3170 SilcChannelEntry channel,
3171 SilcBuffer *channel_users)
3173 SilcChannelClientEntry chl;
3174 SilcBuffer chidp, clidp;
3178 SILC_LOG_DEBUG(("Start"));
3180 /* Now find all users on the channel */
3181 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3182 silc_list_start(channel->user_list);
3183 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3184 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3185 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3186 chidp->data, chidp->len);
3189 silc_buffer_realloc(*channel_users,
3191 (*channel_users)->truelen + len : len));
3192 silc_buffer_pull_tail(*channel_users,
3193 ((*channel_users)->end -
3194 (*channel_users)->data));
3196 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3197 silc_buffer_pull(*channel_users, len);
3198 silc_buffer_free(clidp);
3199 silc_buffer_free(tmp);
3201 silc_buffer_free(chidp);
3204 /* Returns assembled packets for all channels and users on those channels
3205 from the given ID List. The packets are in the form dictated by the
3206 New Channel and New Channel User payloads. */
3208 void silc_server_announce_get_channels(SilcServer server,
3210 SilcBuffer *channels,
3211 SilcBuffer *channel_users)
3213 SilcIDCacheList list;
3214 SilcIDCacheEntry id_cache;
3215 SilcChannelEntry channel;
3220 SILC_LOG_DEBUG(("Start"));
3222 /* Go through all channels in the list */
3223 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3224 SILC_ID_CHANNEL, &list)) {
3225 if (silc_idcache_list_first(list, &id_cache)) {
3227 channel = (SilcChannelEntry)id_cache->context;
3229 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3230 name_len = strlen(channel->channel_name);
3232 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3234 silc_buffer_realloc(*channels,
3235 (*channels ? (*channels)->truelen + len : len));
3236 silc_buffer_pull_tail(*channels,
3237 ((*channels)->end - (*channels)->data));
3238 silc_buffer_format(*channels,
3239 SILC_STR_UI_SHORT(name_len),
3240 SILC_STR_UI_XNSTRING(channel->channel_name,
3242 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3243 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3244 SILC_STR_UI_INT(channel->mode),
3246 silc_buffer_pull(*channels, len);
3248 silc_server_announce_get_channel_users(server, channel,
3253 if (!silc_idcache_list_next(list, &id_cache))
3258 silc_idcache_list_free(list);
3262 /* This function is used to announce our existing channels to our router
3263 when we've connected to it. This also announces the users on the
3264 channels to the router. */
3266 void silc_server_announce_channels(SilcServer server)
3268 SilcBuffer channels = NULL, channel_users = NULL;
3270 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3272 /* Get channels and channel users in local list */
3273 silc_server_announce_get_channels(server, server->local_list,
3274 &channels, &channel_users);
3276 /* Get channels and channel users in global list */
3277 silc_server_announce_get_channels(server, server->global_list,
3278 &channels, &channel_users);
3281 silc_buffer_push(channels, channels->data - channels->head);
3282 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3284 /* Send the packet */
3285 silc_server_packet_send(server, server->router->connection,
3286 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3287 channels->data, channels->len,
3290 silc_buffer_free(channels);
3293 if (channel_users) {
3294 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3295 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3296 channel_users->len);
3298 /* Send the packet */
3299 silc_server_packet_send(server, server->router->connection,
3300 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3301 channel_users->data, channel_users->len,
3304 silc_buffer_free(channel_users);
3308 /* Failure timeout callback. If this is called then we will immediately
3309 process the received failure. We always process the failure with timeout
3310 since we do not want to blindly trust to received failure packets.
3311 This won't be called (the timeout is cancelled) if the failure was
3312 bogus (it is bogus if remote does not close the connection after sending
3315 SILC_TASK_CALLBACK(silc_server_failure_callback)
3317 SilcServerFailureContext f = (SilcServerFailureContext)context;
3319 if (f->sock->protocol) {
3320 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3321 f->sock->protocol->execute(f->server->timeout_queue, 0,
3322 f->sock->protocol, f->sock->sock, 0, 0);
3328 /* Assembles user list and users mode list from the `channel'. */
3330 void silc_server_get_users_on_channel(SilcServer server,
3331 SilcChannelEntry channel,
3332 SilcBuffer *user_list,
3333 SilcBuffer *mode_list,
3336 SilcChannelClientEntry chl;
3337 SilcBuffer client_id_list;
3338 SilcBuffer client_mode_list;
3340 uint32 list_count = 0;
3342 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3343 silc_list_count(channel->user_list));
3344 client_mode_list = silc_buffer_alloc(4 *
3345 silc_list_count(channel->user_list));
3346 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3347 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3348 silc_list_start(channel->user_list);
3349 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3351 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3352 silc_buffer_put(client_id_list, idp->data, idp->len);
3353 silc_buffer_pull(client_id_list, idp->len);
3354 silc_buffer_free(idp);
3356 /* Client's mode on channel */
3357 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3358 silc_buffer_pull(client_mode_list, 4);
3362 silc_buffer_push(client_id_list,
3363 client_id_list->data - client_id_list->head);
3364 silc_buffer_push(client_mode_list,
3365 client_mode_list->data - client_mode_list->head);
3367 *user_list = client_id_list;
3368 *mode_list = client_mode_list;
3369 *user_count = list_count;
3372 /* Saves users and their modes to the `channel'. */
3374 void silc_server_save_users_on_channel(SilcServer server,
3375 SilcSocketConnection sock,
3376 SilcChannelEntry channel,
3377 SilcClientID *noadd,
3378 SilcBuffer user_list,
3379 SilcBuffer mode_list,
3384 /* Cache the received Client ID's and modes. This cache expires
3385 whenever server sends notify message to channel. It means two things;
3386 some user has joined or leaved the channel. XXX TODO! */
3387 for (i = 0; i < user_count; i++) {
3390 SilcClientID *client_id;
3391 SilcClientEntry client;
3394 SILC_GET16_MSB(idp_len, user_list->data + 2);
3396 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3397 silc_buffer_pull(user_list, idp_len);
3402 SILC_GET32_MSB(mode, mode_list->data);
3403 silc_buffer_pull(mode_list, 4);
3405 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3406 silc_free(client_id);
3410 /* Check if we have this client cached already. */
3411 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3414 client = silc_idlist_find_client_by_id(server->global_list,
3417 /* If router did not find such Client ID in its lists then this must
3418 be bogus client or some router in the net is buggy. */
3419 if (server->server_type == SILC_ROUTER) {
3420 silc_free(client_id);
3424 /* We don't have that client anywhere, add it. The client is added
3425 to global list since server didn't have it in the lists so it must be
3427 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3429 silc_id_dup(client_id, SILC_ID_CLIENT),
3430 sock->user_data, NULL);
3432 silc_free(client_id);
3436 client->data.registered = TRUE;
3439 silc_free(client_id);
3441 if (!silc_server_client_on_channel(client, channel)) {
3442 /* Client was not on the channel, add it. */
3443 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3444 chl->client = client;
3446 chl->channel = channel;
3447 silc_list_add(channel->user_list, chl);
3448 silc_list_add(client->channels, chl);
3453 /* Lookups route to the client indicated by the `id_data'. The connection
3454 object and internal data object is returned. Returns NULL if route
3455 could not be found to the client. If the `client_id' is specified then
3456 it is used and the `id_data' is ignored. */
3458 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3459 unsigned char *id_data,
3461 SilcClientID *client_id,
3462 SilcIDListData *idata)
3465 SilcClientEntry client;
3467 SILC_LOG_DEBUG(("Start"));
3469 /* Decode destination Client ID */
3471 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3473 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3477 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3480 /* If the destination belongs to our server we don't have to route
3481 the packet anywhere but to send it to the local destination. */
3482 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3486 if (client && client->data.registered == FALSE)
3489 /* If we are router and the client has router then the client is in
3490 our cell but not directly connected to us. */
3491 if (server->server_type == SILC_ROUTER && client->router) {
3492 /* We are of course in this case the client's router thus the real
3493 "router" of the client is the server who owns the client. Thus
3494 we will send the packet to that server. */
3496 *idata = (SilcIDListData)client->router;
3497 return client->router->connection;
3500 /* Seems that client really is directly connected to us */
3502 *idata = (SilcIDListData)client;
3503 return client->connection;
3506 /* Destination belongs to someone not in this server. If we are normal
3507 server our action is to send the packet to our router. */
3508 if (server->server_type == SILC_SERVER && !server->standalone) {
3511 *idata = (SilcIDListData)server->router;
3512 return server->router->connection;
3515 /* We are router and we will perform route lookup for the destination
3516 and send the packet to fastest route. */
3517 if (server->server_type == SILC_ROUTER && !server->standalone) {
3518 /* Check first that the ID is valid */
3519 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3521 SilcSocketConnection dst_sock;
3523 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3527 *idata = (SilcIDListData)dst_sock->user_data;
3536 /* Encodes and returns channel list of channels the `client' has joined.
3537 Secret channels are not put to the list. */
3539 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3540 SilcClientEntry client)
3542 SilcBuffer buffer = NULL;
3543 SilcChannelEntry channel;
3544 SilcChannelClientEntry chl;
3549 silc_list_start(client->channels);
3550 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3551 channel = chl->channel;
3553 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3556 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3557 name_len = strlen(channel->channel_name);
3559 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3560 buffer = silc_buffer_realloc(buffer,
3561 (buffer ? (buffer)->truelen + len : len));
3562 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3563 silc_buffer_format(buffer,
3564 SILC_STR_UI_SHORT(name_len),
3565 SILC_STR_UI_XNSTRING(channel->channel_name,
3567 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3568 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3569 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3571 silc_buffer_pull(buffer, len);
3576 silc_buffer_push(buffer, buffer->data - buffer->head);
3581 /* Finds client entry by Client ID and if it is not found then resolves
3582 it using WHOIS command. */
3584 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3585 SilcClientID *client_id)
3587 SilcClientEntry client;
3589 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3591 client = silc_idlist_find_client_by_id(server->global_list,
3593 if (!client && server->server_type == SILC_ROUTER)
3597 if (!client && server->standalone)
3600 if (!client || !client->nickname || !client->username) {
3601 SilcBuffer buffer, idp;
3603 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3604 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3605 ++server->cmd_ident, 1,
3606 3, idp->data, idp->len);
3607 silc_server_packet_send(server, client ? client->router->connection :
3608 server->router->connection,
3609 SILC_PACKET_COMMAND, 0,
3610 buffer->data, buffer->len, FALSE);
3611 silc_buffer_free(idp);
3612 silc_buffer_free(buffer);
3618 /* A timeout callback for the re-key. We will be the initiator of the
3621 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3623 SilcSocketConnection sock = (SilcSocketConnection)context;
3624 SilcIDListData idata = (SilcIDListData)sock->user_data;
3625 SilcServer server = (SilcServer)idata->rekey->context;
3626 SilcProtocol protocol;
3627 SilcServerRekeyInternalContext *proto_ctx;
3629 SILC_LOG_DEBUG(("Start"));
3631 /* Allocate internal protocol context. This is sent as context
3633 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3634 proto_ctx->server = (void *)server;
3635 proto_ctx->sock = sock;
3636 proto_ctx->responder = FALSE;
3637 proto_ctx->pfs = idata->rekey->pfs;
3639 /* Perform rekey protocol. Will call the final callback after the
3640 protocol is over. */
3641 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3642 &protocol, proto_ctx, silc_server_rekey_final);
3643 sock->protocol = protocol;
3645 /* Run the protocol */
3646 protocol->execute(server->timeout_queue, 0, protocol,
3649 /* Re-register re-key timeout */
3650 silc_task_register(server->timeout_queue, sock->sock,
3651 silc_server_rekey_callback,
3652 context, idata->rekey->timeout, 0,
3653 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3656 /* The final callback for the REKEY protocol. This will actually take the
3657 new key material into use. */
3659 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3661 SilcProtocol protocol = (SilcProtocol)context;
3662 SilcServerRekeyInternalContext *ctx =
3663 (SilcServerRekeyInternalContext *)protocol->context;
3664 SilcServer server = (SilcServer)ctx->server;
3665 SilcSocketConnection sock = ctx->sock;
3667 SILC_LOG_DEBUG(("Start"));
3669 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3670 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3671 /* Error occured during protocol */
3672 silc_protocol_cancel(server->timeout_queue, protocol);
3673 silc_protocol_free(protocol);
3674 sock->protocol = NULL;
3676 silc_packet_context_free(ctx->packet);
3678 silc_ske_free(ctx->ske);
3684 /* Take the keys into use */
3685 if (ctx->pfs == TRUE)
3686 silc_server_protocol_rekey_generate_pfs(server, ctx);
3688 silc_server_protocol_rekey_generate(server, ctx);
3692 silc_protocol_free(protocol);
3693 sock->protocol = NULL;
3695 silc_packet_context_free(ctx->packet);
3697 silc_ske_free(ctx->ske);