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 /* Perform name and address lookups to resolve the listenning address
245 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
247 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
249 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
250 newsocket->hostname ? newsocket->hostname :
251 newsocket->ip ? newsocket->ip : ""));
252 server->stat.conn_failures++;
255 if (!newsocket->hostname)
256 newsocket->hostname = strdup(newsocket->ip);
258 newsocket->port = silc_net_get_local_port(sock[i]);
260 /* Put the allocated socket pointer also to the entry allocated above
261 for fast back-referencing to the socket list. */
262 id_entry->connection = (void *)server->sockets[sock[i]];
263 server->id_entry = id_entry;
266 /* Register the task queues. In SILC we have by default three task queues.
267 One task queue for non-timeout tasks which perform different kind of
268 I/O on file descriptors, timeout task queue for timeout tasks, and,
269 generic non-timeout task queue whose tasks apply to all connections. */
270 silc_task_queue_alloc(&server->io_queue, TRUE);
271 if (!server->io_queue) {
274 silc_task_queue_alloc(&server->timeout_queue, TRUE);
275 if (!server->timeout_queue) {
278 silc_task_queue_alloc(&server->generic_queue, TRUE);
279 if (!server->generic_queue) {
283 /* Register protocols */
284 silc_server_protocols_register();
286 /* Initialize the scheduler */
287 silc_schedule_init(&server->io_queue, &server->timeout_queue,
288 &server->generic_queue,
289 SILC_SERVER_MAX_CONNECTIONS);
291 /* Add the first task to the queue. This is task that is executed by
292 timeout. It expires as soon as the caller calls silc_server_run. This
293 task performs authentication protocol and key exchange with our
295 silc_task_register(server->timeout_queue, sock[0],
296 silc_server_connect_to_router,
297 (void *)server, 0, 1,
299 SILC_TASK_PRI_NORMAL);
301 /* Add listener task to the queue. This task receives new connections to the
302 server. This task remains on the queue until the end of the program. */
303 silc_task_register(server->io_queue, sock[0],
304 silc_server_accept_new_connection,
305 (void *)server, 0, 0,
307 SILC_TASK_PRI_NORMAL);
308 server->listenning = TRUE;
310 /* If server connections has been configured then we must be router as
311 normal server cannot have server connections, only router connections. */
312 if (server->config->servers)
313 server->server_type = SILC_ROUTER;
315 /* Register the ID Cache purge task. This periodically purges the ID cache
316 and removes the expired cache entries. */
318 /* Clients local list */
319 purge = silc_calloc(1, sizeof(*purge));
320 purge->cache = server->local_list->clients;
321 purge->timeout_queue = server->timeout_queue;
322 silc_task_register(purge->timeout_queue, 0,
324 (void *)purge, 600, 0,
325 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
327 /* Clients global list */
328 purge = silc_calloc(1, sizeof(*purge));
329 purge->cache = server->global_list->clients;
330 purge->timeout_queue = server->timeout_queue;
331 silc_task_register(purge->timeout_queue, 0,
333 (void *)purge, 300, 0,
334 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
336 SILC_LOG_DEBUG(("Server initialized"));
338 /* We are done here, return succesfully */
341 silc_task_queue_free(server->timeout_queue);
343 silc_task_queue_free(server->io_queue);
345 for (i = 0; i < sock_count; i++)
346 silc_net_close_server(sock[i]);
351 /* Fork server to background and set gid+uid to non-root.
352 Silcd will not run as root, so trying to set either user or group to
353 root will cause silcd to exit. */
355 void silc_server_daemonise(SilcServer server)
357 /* Are we executing silcd as root or a regular user? */
364 if (!server->config->identity || !server->config->identity->user ||
365 !server->config->identity->group) {
366 fprintf(stderr, "Error:"
367 "\tSILC server must not be run as root. For the security of your\n"
368 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
369 "\tuser account. Modify the [Identity] configuration section to run\n"
370 "\tthe server as non-root user.\n");
374 /* Get the values given for user and group in configuration file */
375 user=server->config->identity->user;
376 group=server->config->identity->group;
378 /* Check whether the user/group information is text */
379 if (atoi(user)!=0 || atoi(group)!=0) {
380 SILC_LOG_DEBUG(("Invalid user and/or group information"));
381 SILC_LOG_DEBUG(("User and/or group given as number"));
382 fprintf(stderr, "Invalid user and/or group information\n");
383 fprintf(stderr, "Please assign them as names, not numbers\n");
387 /* Catch the nasty incident of string "0" returning 0 from atoi */
388 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
389 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
390 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
398 fprintf(stderr, "No such user %s found\n", user);
403 fprintf(stderr, "No such group %s found\n", group);
407 /* Check whether user and/or group is set to root. If yes, exit
408 immediately. Otherwise, setgid and setuid server to user.group */
409 if (gr->gr_gid==0 || pw->pw_uid==0) {
410 fprintf(stderr, "Error:"
411 "\tSILC server must not be run as root. For the security of your\n"
412 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
413 "\tuser account. Modify the [Identity] configuration section to run\n"
414 "\tthe server as non-root user.\n");
417 /* Fork server to background, making it a daemon */
419 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
420 SILC_LOG_DEBUG(("Forking SILC server to background"));
425 SILC_LOG_DEBUG(("Changing to group %s", group));
426 if(setgid(gr->gr_gid)==0) {
427 SILC_LOG_DEBUG(("Setgid to %s", group));
429 SILC_LOG_DEBUG(("Setgid to %s failed", group));
430 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
434 SILC_LOG_DEBUG(("Changing to user nobody"));
435 if(setuid(pw->pw_uid)==0) {
436 SILC_LOG_DEBUG(("Setuid to %s", user));
438 SILC_LOG_DEBUG(("Setuid to %s failed", user));
439 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
445 /* Fork server to background, making it a daemon */
447 SILC_LOG_DEBUG(("Server started as user"));
448 SILC_LOG_DEBUG(("Forking SILC server to background"));
455 /* Stops the SILC server. This function is used to shutdown the server.
456 This is usually called after the scheduler has returned. After stopping
457 the server one should call silc_server_free. */
459 void silc_server_stop(SilcServer server)
461 SILC_LOG_DEBUG(("Stopping server"));
463 /* Stop the scheduler, although it might be already stopped. This
464 doesn't hurt anyone. This removes all the tasks and task queues,
466 silc_schedule_stop();
467 silc_schedule_uninit();
469 silc_server_protocols_unregister();
471 SILC_LOG_DEBUG(("Server stopped"));
474 /* The heart of the server. This runs the scheduler thus runs the server.
475 When this returns the server has been stopped and the program will
478 void silc_server_run(SilcServer server)
480 SILC_LOG_DEBUG(("Running server"));
482 /* Start the scheduler, the heart of the SILC server. When this returns
483 the program will be terminated. */
487 /* Timeout callback that will be called to retry connecting to remote
488 router. This is used by both normal and router server. This will wait
489 before retrying the connecting. The timeout is generated by exponential
490 backoff algorithm. */
492 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
494 SilcServerConnection sconn = (SilcServerConnection)context;
495 SilcServer server = sconn->server;
497 SILC_LOG_INFO(("Retrying connecting to a router"));
499 /* Calculate next timeout */
500 if (sconn->retry_count >= 1) {
501 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
502 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
503 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
505 sconn->retry_timeout = server->params->retry_interval_min;
507 sconn->retry_count++;
508 sconn->retry_timeout = sconn->retry_timeout +
509 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
511 /* If we've reached max retry count, give up. */
512 if (sconn->retry_count > server->params->retry_count &&
513 server->params->retry_keep_trying == FALSE) {
514 SILC_LOG_ERROR(("Could not connect to router, giving up"));
518 /* Wait one before retrying */
519 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
520 context, sconn->retry_timeout,
521 server->params->retry_interval_min_usec,
522 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
525 /* Generic routine to use connect to a router. */
527 SILC_TASK_CALLBACK(silc_server_connect_router)
529 SilcServerConnection sconn = (SilcServerConnection)context;
530 SilcServer server = sconn->server;
531 SilcSocketConnection newsocket;
532 SilcProtocol protocol;
533 SilcServerKEInternalContext *proto_ctx;
536 SILC_LOG_INFO(("Connecting to the router %s on port %d",
537 sconn->remote_host, sconn->remote_port));
539 /* Connect to remote host */
540 sock = silc_net_create_connection(sconn->remote_port,
543 SILC_LOG_ERROR(("Could not connect to router"));
544 silc_task_register(server->timeout_queue, fd,
545 silc_server_connect_to_router_retry,
546 context, 0, 1, SILC_TASK_TIMEOUT,
547 SILC_TASK_PRI_NORMAL);
551 /* Set socket options */
552 silc_net_set_socket_nonblock(sock);
553 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
555 /* Create socket connection for the connection. Even though we
556 know that we are connecting to a router we will mark the socket
557 to be unknown connection until we have executed authentication
559 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
560 server->sockets[sock] = newsocket;
561 newsocket->hostname = strdup(sconn->remote_host);
562 newsocket->ip = strdup(sconn->remote_host);
563 newsocket->port = sconn->remote_port;
564 sconn->sock = newsocket;
566 /* Allocate internal protocol context. This is sent as context
568 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
569 proto_ctx->server = (void *)server;
570 proto_ctx->context = (void *)sconn;
571 proto_ctx->sock = newsocket;
572 proto_ctx->rng = server->rng;
573 proto_ctx->responder = FALSE;
575 /* Perform key exchange protocol. silc_server_connect_to_router_second
576 will be called after the protocol is finished. */
577 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
578 &protocol, proto_ctx,
579 silc_server_connect_to_router_second);
580 newsocket->protocol = protocol;
582 /* Register a timeout task that will be executed if the protocol
583 is not executed within set limit. */
584 proto_ctx->timeout_task =
585 silc_task_register(server->timeout_queue, sock,
586 silc_server_timeout_remote,
587 server, server->params->protocol_timeout,
588 server->params->protocol_timeout_usec,
592 /* Register the connection for network input and output. This sets
593 that scheduler will listen for incoming packets for this connection
594 and sets that outgoing packets may be sent to this connection as
595 well. However, this doesn't set the scheduler for outgoing traffic,
596 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
597 later when outgoing data is available. */
598 context = (void *)server;
599 SILC_REGISTER_CONNECTION_FOR_IO(sock);
601 /* Run the protocol */
602 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
605 /* This function connects to our primary router or if we are a router this
606 establishes all our primary routes. This is called at the start of the
607 server to do authentication and key exchange with our router - called
610 SILC_TASK_CALLBACK(silc_server_connect_to_router)
612 SilcServer server = (SilcServer)context;
613 SilcServerConnection sconn;
615 SILC_LOG_DEBUG(("Connecting to router(s)"));
617 /* If we are normal SILC server we need to connect to our cell's
619 if (server->server_type == SILC_SERVER) {
620 SILC_LOG_DEBUG(("We are normal server"));
622 /* Create connection to the router, if configured. */
623 if (server->config->routers) {
625 /* Allocate connection object for hold connection specific stuff. */
626 sconn = silc_calloc(1, sizeof(*sconn));
627 sconn->server = server;
628 sconn->remote_host = strdup(server->config->routers->host);
629 sconn->remote_port = server->config->routers->port;
631 silc_task_register(server->timeout_queue, fd,
632 silc_server_connect_router,
633 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
634 SILC_TASK_PRI_NORMAL);
639 /* If we are a SILC router we need to establish all of our primary
641 if (server->server_type == SILC_ROUTER) {
642 SilcServerConfigSectionServerConnection *ptr;
644 SILC_LOG_DEBUG(("We are router"));
646 /* Create the connections to all our routes */
647 ptr = server->config->routers;
650 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
651 ptr->initiator ? "Initiator" : "Responder",
652 ptr->host, ptr->port));
654 if (ptr->initiator) {
655 /* Allocate connection object for hold connection specific stuff. */
656 sconn = silc_calloc(1, sizeof(*sconn));
657 sconn->server = server;
658 sconn->remote_host = strdup(ptr->host);
659 sconn->remote_port = ptr->port;
661 silc_task_register(server->timeout_queue, fd,
662 silc_server_connect_router,
663 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
664 SILC_TASK_PRI_NORMAL);
674 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
676 /* There wasn't a configured router, we will continue but we don't
677 have a connection to outside world. We will be standalone server. */
678 server->standalone = TRUE;
681 /* Second part of connecting to router(s). Key exchange protocol has been
682 executed and now we will execute authentication protocol. */
684 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
686 SilcProtocol protocol = (SilcProtocol)context;
687 SilcServerKEInternalContext *ctx =
688 (SilcServerKEInternalContext *)protocol->context;
689 SilcServer server = (SilcServer)ctx->server;
690 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
691 SilcSocketConnection sock = server->sockets[fd];
692 SilcServerConnAuthInternalContext *proto_ctx;
693 SilcServerConfigSectionServerConnection *conn = NULL;
695 SILC_LOG_DEBUG(("Start"));
697 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
698 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
699 /* Error occured during protocol */
700 silc_protocol_free(protocol);
701 sock->protocol = NULL;
702 silc_ske_free_key_material(ctx->keymat);
704 silc_packet_context_free(ctx->packet);
706 silc_ske_free(ctx->ske);
708 silc_free(ctx->dest_id);
710 silc_task_unregister_by_callback(server->timeout_queue,
711 silc_server_failure_callback);
712 silc_server_disconnect_remote(server, sock, "Server closed connection: "
713 "Key exchange failed");
717 /* We now have the key material as the result of the key exchange
718 protocol. Take the key material into use. Free the raw key material
719 as soon as we've set them into use. */
720 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
721 ctx->ske->prop->cipher,
722 ctx->ske->prop->pkcs,
723 ctx->ske->prop->hash,
724 ctx->ske->prop->hmac,
725 ctx->ske->prop->group,
727 silc_protocol_free(protocol);
728 sock->protocol = NULL;
729 silc_ske_free_key_material(ctx->keymat);
731 silc_packet_context_free(ctx->packet);
733 silc_ske_free(ctx->ske);
735 silc_free(ctx->dest_id);
737 silc_task_unregister_by_callback(server->timeout_queue,
738 silc_server_failure_callback);
739 silc_server_disconnect_remote(server, sock, "Server closed connection: "
740 "Key exchange failed");
743 silc_ske_free_key_material(ctx->keymat);
745 /* Allocate internal context for the authentication protocol. This
746 is sent as context for the protocol. */
747 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
748 proto_ctx->server = (void *)server;
749 proto_ctx->context = (void *)sconn;
750 proto_ctx->sock = sock;
751 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
752 proto_ctx->dest_id_type = ctx->dest_id_type;
753 proto_ctx->dest_id = ctx->dest_id;
755 /* Resolve the authentication method used in this connection. Check if
756 we find a match from user configured connections */
757 conn = silc_server_config_find_router_conn(server->config,
761 /* Match found. Use the configured authentication method */
762 proto_ctx->auth_meth = conn->auth_meth;
763 if (conn->auth_data) {
764 proto_ctx->auth_data = strdup(conn->auth_data);
765 proto_ctx->auth_data_len = strlen(conn->auth_data);
768 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
769 sock->hostname, sock->ip, sock->port));
770 silc_protocol_free(protocol);
771 sock->protocol = NULL;
773 silc_packet_context_free(ctx->packet);
775 silc_ske_free(ctx->ske);
777 silc_free(ctx->dest_id);
779 silc_task_unregister_by_callback(server->timeout_queue,
780 silc_server_failure_callback);
781 silc_server_disconnect_remote(server, sock, "Server closed connection: "
782 "Key exchange failed");
786 /* Free old protocol as it is finished now */
787 silc_protocol_free(protocol);
789 silc_packet_context_free(ctx->packet);
791 sock->protocol = NULL;
793 /* Allocate the authentication protocol. This is allocated here
794 but we won't start it yet. We will be receiving party of this
795 protocol thus we will wait that connecting party will make
797 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
798 &sock->protocol, proto_ctx,
799 silc_server_connect_to_router_final);
801 /* Register timeout task. If the protocol is not executed inside
802 this timelimit the connection will be terminated. Currently
803 this is 15 seconds and is hard coded limit (XXX). */
804 proto_ctx->timeout_task =
805 silc_task_register(server->timeout_queue, sock->sock,
806 silc_server_timeout_remote,
807 (void *)server, 15, 0,
811 /* Run the protocol */
812 sock->protocol->execute(server->timeout_queue, 0,
813 sock->protocol, sock->sock, 0, 0);
816 /* Finalizes the connection to router. Registers a server task to the
817 queue so that we can accept new connections. */
819 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
821 SilcProtocol protocol = (SilcProtocol)context;
822 SilcServerConnAuthInternalContext *ctx =
823 (SilcServerConnAuthInternalContext *)protocol->context;
824 SilcServer server = (SilcServer)ctx->server;
825 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
826 SilcSocketConnection sock = ctx->sock;
827 SilcServerEntry id_entry;
829 SilcServerHBContext hb_context;
830 unsigned char *id_string;
831 SilcIDListData idata;
833 SILC_LOG_DEBUG(("Start"));
835 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
836 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
837 /* Error occured during protocol */
839 silc_free(ctx->dest_id);
840 silc_server_disconnect_remote(server, sock, "Server closed connection: "
841 "Authentication failed");
845 /* Add a task to the queue. This task receives new connections to the
846 server. This task remains on the queue until the end of the program. */
847 if (!server->listenning) {
848 silc_task_register(server->io_queue, server->sock,
849 silc_server_accept_new_connection,
850 (void *)server, 0, 0,
852 SILC_TASK_PRI_NORMAL);
853 server->listenning = TRUE;
856 /* Send NEW_SERVER packet to the router. We will become registered
857 to the SILC network after sending this packet. */
858 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
859 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
860 strlen(server->server_name));
861 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
862 silc_buffer_format(packet,
863 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
864 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
865 SILC_STR_UI_SHORT(strlen(server->server_name)),
866 SILC_STR_UI_XNSTRING(server->server_name,
867 strlen(server->server_name)),
870 /* Send the packet */
871 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
872 packet->data, packet->len, TRUE);
873 silc_buffer_free(packet);
874 silc_free(id_string);
876 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
878 /* Add the connected router to local server list */
879 server->standalone = FALSE;
880 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
881 SILC_ROUTER, ctx->dest_id, NULL, sock);
884 silc_free(ctx->dest_id);
885 silc_server_disconnect_remote(server, sock, "Server closed connection: "
886 "Authentication failed");
890 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
891 silc_free(sock->user_data);
892 sock->user_data = (void *)id_entry;
893 sock->type = SILC_SOCKET_TYPE_ROUTER;
894 server->id_entry->router = id_entry;
895 server->router = id_entry;
896 idata = (SilcIDListData)sock->user_data;
897 idata->registered = TRUE;
899 /* Perform keepalive. The `hb_context' will be freed automatically
900 when finally calling the silc_socket_free function. XXX hardcoded
902 hb_context = silc_calloc(1, sizeof(*hb_context));
903 hb_context->server = server;
904 silc_socket_set_heartbeat(sock, 600, hb_context,
905 silc_server_perform_heartbeat,
906 server->timeout_queue);
908 /* Register re-key timeout */
909 idata->rekey->timeout = 3600; /* XXX hardcoded */
910 idata->rekey->context = (void *)server;
911 silc_task_register(server->timeout_queue, sock->sock,
912 silc_server_rekey_callback,
913 (void *)sock, idata->rekey->timeout, 0,
914 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
916 /* If we are router then announce our possible servers. */
917 if (server->server_type == SILC_ROUTER)
918 silc_server_announce_servers(server);
920 /* Announce our clients and channels to the router */
921 silc_server_announce_clients(server);
922 silc_server_announce_channels(server);
925 /* Free the temporary connection data context */
927 silc_free(sconn->remote_host);
931 /* Free the protocol object */
932 silc_protocol_free(protocol);
934 silc_packet_context_free(ctx->packet);
936 silc_ske_free(ctx->ske);
938 sock->protocol = NULL;
941 /* Accepts new connections to the server. Accepting new connections are
942 done in three parts to make it async. */
944 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
946 SilcServer server = (SilcServer)context;
947 SilcSocketConnection newsocket;
948 SilcServerKEInternalContext *proto_ctx;
952 SILC_LOG_DEBUG(("Accepting new connection"));
954 server->stat.conn_attempts++;
956 sock = silc_net_accept_connection(server->sock);
958 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
959 server->stat.conn_failures++;
963 /* Check max connections */
964 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
965 SILC_LOG_ERROR(("Refusing connection, server is full"));
966 server->stat.conn_failures++;
970 /* Set socket options */
971 silc_net_set_socket_nonblock(sock);
972 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
974 /* We don't create a ID yet, since we don't know what type of connection
975 this is yet. But, we do add the connection to the socket table. */
976 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
977 server->sockets[sock] = newsocket;
979 /* XXX This MUST be done async as this will block the entire server
980 process. Either we have to do our own resolver stuff or in the future
981 we can use threads. */
982 /* Perform name and address lookups for the remote host. */
983 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
985 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
987 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
988 newsocket->hostname ? newsocket->hostname :
989 newsocket->ip ? newsocket->ip : ""));
990 server->stat.conn_failures++;
993 if (!newsocket->hostname)
994 newsocket->hostname = strdup(newsocket->ip);
996 newsocket->port = silc_net_get_remote_port(sock);
998 /* Register the connection for network input and output. This sets
999 that scheduler will listen for incoming packets for this connection
1000 and sets that outgoing packets may be sent to this connection as well.
1001 However, this doesn't set the scheduler for outgoing traffic, it
1002 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1003 later when outgoing data is available. */
1004 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1006 /* Check whether we have configred this sort of connection at all. We
1007 have to check all configurations since we don't know what type of
1008 connection this is. */
1009 port = server->sockets[fd]->port; /* Listenning port */
1010 if (!(config = silc_server_config_find_client_conn(server->config,
1011 newsocket->ip, port)))
1012 if (!(config = silc_server_config_find_client_conn(server->config,
1013 newsocket->hostname,
1015 if (!(config = silc_server_config_find_server_conn(server->config,
1018 if (!(config = silc_server_config_find_server_conn(server->config,
1019 newsocket->hostname,
1022 silc_server_config_find_router_conn(server->config,
1023 newsocket->ip, port)))
1025 silc_server_config_find_router_conn(server->config,
1026 newsocket->hostname,
1028 silc_server_disconnect_remote(server, newsocket,
1029 "Server closed connection: "
1030 "Connection refused");
1031 server->stat.conn_failures++;
1035 /* The connection is allowed */
1037 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1040 /* Allocate internal context for key exchange protocol. This is
1041 sent as context for the protocol. */
1042 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1043 proto_ctx->server = context;
1044 proto_ctx->sock = newsocket;
1045 proto_ctx->rng = server->rng;
1046 proto_ctx->responder = TRUE;
1047 proto_ctx->config = config;
1049 /* Prepare the connection for key exchange protocol. We allocate the
1050 protocol but will not start it yet. The connector will be the
1051 initiator of the protocol thus we will wait for initiation from
1052 there before we start the protocol. */
1053 server->stat.auth_attempts++;
1054 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1055 &newsocket->protocol, proto_ctx,
1056 silc_server_accept_new_connection_second);
1058 /* Register a timeout task that will be executed if the connector
1059 will not start the key exchange protocol within 60 seconds. For
1060 now, this is a hard coded limit. After 60 secs the connection will
1061 be closed if the key exchange protocol has not been started. */
1062 proto_ctx->timeout_task =
1063 silc_task_register(server->timeout_queue, newsocket->sock,
1064 silc_server_timeout_remote,
1070 /* Second part of accepting new connection. Key exchange protocol has been
1071 performed and now it is time to do little connection authentication
1072 protocol to figure out whether this connection is client or server
1073 and whether it has right to access this server (especially server
1074 connections needs to be authenticated). */
1076 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1078 SilcProtocol protocol = (SilcProtocol)context;
1079 SilcServerKEInternalContext *ctx =
1080 (SilcServerKEInternalContext *)protocol->context;
1081 SilcServer server = (SilcServer)ctx->server;
1082 SilcSocketConnection sock = server->sockets[fd];
1083 SilcServerConnAuthInternalContext *proto_ctx;
1085 SILC_LOG_DEBUG(("Start"));
1087 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1088 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1089 /* Error occured during protocol */
1090 silc_protocol_free(protocol);
1091 sock->protocol = NULL;
1092 silc_ske_free_key_material(ctx->keymat);
1094 silc_packet_context_free(ctx->packet);
1096 silc_ske_free(ctx->ske);
1098 silc_free(ctx->dest_id);
1100 silc_task_unregister_by_callback(server->timeout_queue,
1101 silc_server_failure_callback);
1102 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1103 "Key exchange failed");
1104 server->stat.auth_failures++;
1108 /* We now have the key material as the result of the key exchange
1109 protocol. Take the key material into use. Free the raw key material
1110 as soon as we've set them into use. */
1111 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1112 ctx->ske->prop->cipher,
1113 ctx->ske->prop->pkcs,
1114 ctx->ske->prop->hash,
1115 ctx->ske->prop->hmac,
1116 ctx->ske->prop->group,
1118 silc_protocol_free(protocol);
1119 sock->protocol = NULL;
1120 silc_ske_free_key_material(ctx->keymat);
1122 silc_packet_context_free(ctx->packet);
1124 silc_ske_free(ctx->ske);
1126 silc_free(ctx->dest_id);
1128 silc_task_unregister_by_callback(server->timeout_queue,
1129 silc_server_failure_callback);
1130 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1131 "Key exchange failed");
1132 server->stat.auth_failures++;
1135 silc_ske_free_key_material(ctx->keymat);
1137 /* Allocate internal context for the authentication protocol. This
1138 is sent as context for the protocol. */
1139 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1140 proto_ctx->server = (void *)server;
1141 proto_ctx->sock = sock;
1142 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1143 proto_ctx->responder = TRUE;
1144 proto_ctx->dest_id_type = ctx->dest_id_type;
1145 proto_ctx->dest_id = ctx->dest_id;
1146 proto_ctx->config = ctx->config;
1148 /* Free old protocol as it is finished now */
1149 silc_protocol_free(protocol);
1151 silc_packet_context_free(ctx->packet);
1153 sock->protocol = NULL;
1155 /* Allocate the authentication protocol. This is allocated here
1156 but we won't start it yet. We will be receiving party of this
1157 protocol thus we will wait that connecting party will make
1158 their first move. */
1159 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1160 &sock->protocol, proto_ctx,
1161 silc_server_accept_new_connection_final);
1163 /* Register timeout task. If the protocol is not executed inside
1164 this timelimit the connection will be terminated. Currently
1165 this is 60 seconds and is hard coded limit (XXX). */
1166 proto_ctx->timeout_task =
1167 silc_task_register(server->timeout_queue, sock->sock,
1168 silc_server_timeout_remote,
1169 (void *)server, 60, 0,
1174 /* Final part of accepting new connection. The connection has now
1175 been authenticated and keys has been exchanged. We also know whether
1176 this is client or server connection. */
1178 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1180 SilcProtocol protocol = (SilcProtocol)context;
1181 SilcServerConnAuthInternalContext *ctx =
1182 (SilcServerConnAuthInternalContext *)protocol->context;
1183 SilcServer server = (SilcServer)ctx->server;
1184 SilcSocketConnection sock = ctx->sock;
1185 SilcServerHBContext hb_context;
1186 void *id_entry = NULL;
1188 SILC_LOG_DEBUG(("Start"));
1190 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1191 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1192 /* Error occured during protocol */
1193 silc_protocol_free(protocol);
1194 sock->protocol = NULL;
1196 silc_packet_context_free(ctx->packet);
1198 silc_ske_free(ctx->ske);
1200 silc_free(ctx->dest_id);
1203 sock->protocol = NULL;
1204 silc_task_unregister_by_callback(server->timeout_queue,
1205 silc_server_failure_callback);
1206 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1207 "Authentication failed");
1208 server->stat.auth_failures++;
1212 sock->type = ctx->conn_type;
1213 switch(sock->type) {
1214 case SILC_SOCKET_TYPE_CLIENT:
1216 SilcClientEntry client;
1218 SILC_LOG_DEBUG(("Remote host is client"));
1219 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1222 /* Add the client to the client ID cache. The nickname and Client ID
1223 and other information is created after we have received NEW_CLIENT
1224 packet from client. */
1225 client = silc_idlist_add_client(server->local_list,
1226 NULL, 0, NULL, NULL, NULL, NULL, sock);
1228 SILC_LOG_ERROR(("Could not add new client to cache"));
1229 silc_free(sock->user_data);
1234 server->stat.my_clients++;
1235 server->stat.clients++;
1236 if (server->server_type == SILC_ROUTER)
1237 server->stat.cell_clients++;
1239 id_entry = (void *)client;
1242 case SILC_SOCKET_TYPE_SERVER:
1243 case SILC_SOCKET_TYPE_ROUTER:
1245 SilcServerEntry new_server;
1246 SilcServerConfigSectionServerConnection *conn = ctx->config;
1248 SILC_LOG_DEBUG(("Remote host is %s",
1249 sock->type == SILC_SOCKET_TYPE_SERVER ?
1250 "server" : "router"));
1251 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1252 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1253 "server" : "router"));
1255 /* Add the server into server cache. The server name and Server ID
1256 is updated after we have received NEW_SERVER packet from the
1257 server. We mark ourselves as router for this server if we really
1260 silc_idlist_add_server(server->local_list, NULL,
1261 sock->type == SILC_SOCKET_TYPE_SERVER ?
1262 SILC_SERVER : SILC_ROUTER, NULL,
1263 sock->type == SILC_SOCKET_TYPE_SERVER ?
1264 server->id_entry : NULL, sock);
1266 SILC_LOG_ERROR(("Could not add new server to cache"));
1267 silc_free(sock->user_data);
1272 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1273 server->stat.my_servers++;
1275 server->stat.my_routers++;
1276 server->stat.servers++;
1278 id_entry = (void *)new_server;
1280 /* Check whether this connection is to be our primary router connection
1281 if we dont' already have the primary route. */
1282 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1283 if (silc_server_config_is_primary_route(server->config) &&
1287 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1288 server->standalone = FALSE;
1289 if (!server->id_entry->router) {
1290 server->id_entry->router = id_entry;
1291 server->router = id_entry;
1301 /* Add the common data structure to the ID entry. */
1303 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1305 /* Add to sockets internal pointer for fast referencing */
1306 silc_free(sock->user_data);
1307 sock->user_data = id_entry;
1309 /* Connection has been fully established now. Everything is ok. */
1310 SILC_LOG_DEBUG(("New connection authenticated"));
1312 /* Perform keepalive. The `hb_context' will be freed automatically
1313 when finally calling the silc_socket_free function. XXX hardcoded
1315 hb_context = silc_calloc(1, sizeof(*hb_context));
1316 hb_context->server = server;
1317 silc_socket_set_heartbeat(sock, 600, hb_context,
1318 silc_server_perform_heartbeat,
1319 server->timeout_queue);
1321 silc_task_unregister_by_callback(server->timeout_queue,
1322 silc_server_failure_callback);
1323 silc_protocol_free(protocol);
1325 silc_packet_context_free(ctx->packet);
1327 silc_ske_free(ctx->ske);
1329 silc_free(ctx->dest_id);
1331 sock->protocol = NULL;
1334 /* This function is used to read packets from network and send packets to
1335 network. This is usually a generic task. */
1337 SILC_TASK_CALLBACK(silc_server_packet_process)
1339 SilcServer server = (SilcServer)context;
1340 SilcSocketConnection sock = server->sockets[fd];
1341 SilcIDListData idata;
1342 SilcCipher cipher = NULL;
1343 SilcHmac hmac = NULL;
1349 SILC_LOG_DEBUG(("Processing packet"));
1351 /* Packet sending */
1353 if (type == SILC_TASK_WRITE) {
1354 /* Do not send data to disconnected connection */
1355 if (SILC_IS_DISCONNECTED(sock))
1358 server->stat.packets_sent++;
1360 if (sock->outbuf->data - sock->outbuf->head)
1361 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1363 /* Send the packet */
1364 ret = silc_packet_send(sock, TRUE);
1366 /* If returned -2 could not write to connection now, will do
1374 /* The packet has been sent and now it is time to set the connection
1375 back to only for input. When there is again some outgoing data
1376 available for this connection it will be set for output as well.
1377 This call clears the output setting and sets it only for input. */
1378 SILC_SET_CONNECTION_FOR_INPUT(fd);
1379 SILC_UNSET_OUTBUF_PENDING(sock);
1381 silc_buffer_clear(sock->outbuf);
1385 /* Packet receiving */
1387 /* Read some data from connection */
1388 ret = silc_packet_receive(sock);
1394 SILC_LOG_DEBUG(("Read EOF"));
1396 /* If connection is disconnecting already we will finally
1397 close the connection */
1398 if (SILC_IS_DISCONNECTING(sock)) {
1399 if (sock->user_data)
1400 silc_server_free_sock_user_data(server, sock);
1401 silc_server_close_connection(server, sock);
1405 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1406 SILC_SET_DISCONNECTING(sock);
1408 /* If the closed connection was our primary router connection the
1409 start re-connecting phase. */
1410 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1411 sock == server->router->connection)
1412 silc_task_register(server->timeout_queue, 0,
1413 silc_server_connect_to_router,
1416 SILC_TASK_PRI_NORMAL);
1418 if (sock->user_data)
1419 silc_server_free_sock_user_data(server, sock);
1420 silc_server_close_connection(server, sock);
1424 /* If connection is disconnecting or disconnected we will ignore
1426 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1427 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1431 server->stat.packets_received++;
1433 /* Get keys and stuff from ID entry */
1434 idata = (SilcIDListData)sock->user_data;
1436 idata->last_receive = time(NULL);
1437 cipher = idata->receive_key;
1438 hmac = idata->hmac_receive;
1441 /* Process the packet. This will call the parser that will then
1442 decrypt and parse the packet. */
1443 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1447 /* Callback function that the silc_packet_decrypt will call to make the
1448 decision whether the packet is normal or special packet. We will
1449 return TRUE if it is normal and FALSE if it is special */
1451 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1453 SilcPacketContext *packet,
1456 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1457 SilcServer server = (SilcServer)parse_ctx->context;
1459 /* Packet is normal packet, if:
1461 1) packet is private message packet and does not have private key set
1462 2) is other packet than channel message packet
1463 3) is channel message packet and remote is router and we are router
1465 all other packets are special packets
1468 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1469 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1472 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1473 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1474 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1475 server->server_type == SILC_ROUTER))
1481 /* Parses whole packet, received earlier. */
1483 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1485 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1486 SilcServer server = (SilcServer)parse_ctx->context;
1487 SilcSocketConnection sock = parse_ctx->sock;
1488 SilcPacketContext *packet = parse_ctx->packet;
1489 SilcIDListData idata = (SilcIDListData)sock->user_data;
1492 SILC_LOG_DEBUG(("Start"));
1494 /* Decrypt the received packet */
1495 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1496 idata ? idata->hmac_receive : NULL,
1497 packet->buffer, packet,
1498 silc_server_packet_decrypt_check, parse_ctx);
1503 /* Parse the packet. Packet type is returned. */
1504 ret = silc_packet_parse(packet);
1506 /* Parse the packet header in special way as this is "special"
1508 ret = silc_packet_parse_special(packet);
1511 if (ret == SILC_PACKET_NONE)
1514 /* Check that the the current client ID is same as in the client's packet. */
1515 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1516 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1517 if (client && client->id) {
1518 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1519 packet->src_id_type);
1520 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1528 if (server->server_type == SILC_ROUTER) {
1529 /* Route the packet if it is not destined to us. Other ID types but
1530 server are handled separately after processing them. */
1531 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1532 packet->dst_id_type == SILC_ID_SERVER &&
1533 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1534 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1536 /* Route the packet to fastest route for the destination ID */
1537 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1538 packet->dst_id_type);
1541 silc_server_packet_route(server,
1542 silc_server_route_get(server, id,
1543 packet->dst_id_type),
1550 /* Parse the incoming packet type */
1551 silc_server_packet_parse_type(server, sock, packet);
1553 if (server->server_type == SILC_ROUTER) {
1554 /* Broadcast packet if it is marked as broadcast packet and it is
1555 originated from router and we are router. */
1556 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1557 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1558 !server->standalone) {
1559 silc_server_packet_broadcast(server, server->router->connection, packet);
1564 /* silc_buffer_clear(sock->inbuf); */
1565 silc_packet_context_free(packet);
1566 silc_free(parse_ctx);
1569 /* Parser callback called by silc_packet_receive_process. This merely
1570 registers timeout that will handle the actual parsing when appropriate. */
1572 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1574 SilcServer server = (SilcServer)parser_context->context;
1575 SilcSocketConnection sock = parser_context->sock;
1577 switch (sock->type) {
1578 case SILC_SOCKET_TYPE_UNKNOWN:
1579 case SILC_SOCKET_TYPE_CLIENT:
1580 /* Parse the packet with timeout */
1581 silc_task_register(server->timeout_queue, sock->sock,
1582 silc_server_packet_parse_real,
1583 (void *)parser_context, 0, 100000,
1585 SILC_TASK_PRI_NORMAL);
1587 case SILC_SOCKET_TYPE_SERVER:
1588 case SILC_SOCKET_TYPE_ROUTER:
1589 /* Packets from servers are parsed as soon as possible */
1590 silc_task_register(server->timeout_queue, sock->sock,
1591 silc_server_packet_parse_real,
1592 (void *)parser_context, 0, 1,
1594 SILC_TASK_PRI_NORMAL);
1601 /* Parses the packet type and calls what ever routines the packet type
1602 requires. This is done for all incoming packets. */
1604 void silc_server_packet_parse_type(SilcServer server,
1605 SilcSocketConnection sock,
1606 SilcPacketContext *packet)
1608 SilcPacketType type = packet->type;
1610 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1612 /* Parse the packet type */
1614 case SILC_PACKET_DISCONNECT:
1615 SILC_LOG_DEBUG(("Disconnect packet"));
1616 if (packet->flags & SILC_PACKET_FLAG_LIST)
1620 case SILC_PACKET_SUCCESS:
1622 * Success received for something. For now we can have only
1623 * one protocol for connection executing at once hence this
1624 * success message is for whatever protocol is executing currently.
1626 SILC_LOG_DEBUG(("Success packet"));
1627 if (packet->flags & SILC_PACKET_FLAG_LIST)
1629 if (sock->protocol) {
1630 sock->protocol->execute(server->timeout_queue, 0,
1631 sock->protocol, sock->sock, 0, 0);
1635 case SILC_PACKET_FAILURE:
1637 * Failure received for something. For now we can have only
1638 * one protocol for connection executing at once hence this
1639 * failure message is for whatever protocol is executing currently.
1641 SILC_LOG_DEBUG(("Failure packet"));
1642 if (packet->flags & SILC_PACKET_FLAG_LIST)
1644 if (sock->protocol) {
1645 SilcServerFailureContext f;
1646 f = silc_calloc(1, sizeof(*f));
1650 /* We will wait 5 seconds to process this failure packet */
1651 silc_task_register(server->timeout_queue, sock->sock,
1652 silc_server_failure_callback, (void *)f, 5, 0,
1653 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1657 case SILC_PACKET_REJECT:
1658 SILC_LOG_DEBUG(("Reject packet"));
1659 if (packet->flags & SILC_PACKET_FLAG_LIST)
1664 case SILC_PACKET_NOTIFY:
1666 * Received notify packet. Server can receive notify packets from
1667 * router. Server then relays the notify messages to clients if needed.
1669 SILC_LOG_DEBUG(("Notify packet"));
1670 if (packet->flags & SILC_PACKET_FLAG_LIST)
1671 silc_server_notify_list(server, sock, packet);
1673 silc_server_notify(server, sock, packet);
1679 case SILC_PACKET_CHANNEL_MESSAGE:
1681 * Received channel message. Channel messages are special packets
1682 * (although probably most common ones) thus they are handled
1685 SILC_LOG_DEBUG(("Channel Message packet"));
1686 if (packet->flags & SILC_PACKET_FLAG_LIST)
1688 silc_server_channel_message(server, sock, packet);
1691 case SILC_PACKET_CHANNEL_KEY:
1693 * Received key for channel. As channels are created by the router
1694 * the keys are as well. We will distribute the key to all of our
1695 * locally connected clients on the particular channel. Router
1696 * never receives this channel and thus is ignored.
1698 SILC_LOG_DEBUG(("Channel Key packet"));
1699 if (packet->flags & SILC_PACKET_FLAG_LIST)
1701 silc_server_channel_key(server, sock, packet);
1707 case SILC_PACKET_COMMAND:
1709 * Recived command. Processes the command request and allocates the
1710 * command context and calls the command.
1712 SILC_LOG_DEBUG(("Command packet"));
1713 if (packet->flags & SILC_PACKET_FLAG_LIST)
1715 silc_server_command_process(server, sock, packet);
1718 case SILC_PACKET_COMMAND_REPLY:
1720 * Received command reply packet. Received command reply to command. It
1721 * may be reply to command sent by us or reply to command sent by client
1722 * that we've routed further.
1724 SILC_LOG_DEBUG(("Command Reply packet"));
1725 if (packet->flags & SILC_PACKET_FLAG_LIST)
1727 silc_server_command_reply(server, sock, packet);
1731 * Private Message packets
1733 case SILC_PACKET_PRIVATE_MESSAGE:
1735 * Received private message packet. The packet is coming from either
1738 SILC_LOG_DEBUG(("Private Message packet"));
1739 if (packet->flags & SILC_PACKET_FLAG_LIST)
1741 silc_server_private_message(server, sock, packet);
1744 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1746 * Private message key packet.
1748 if (packet->flags & SILC_PACKET_FLAG_LIST)
1750 silc_server_private_message_key(server, sock, packet);
1754 * Key Exchange protocol packets
1756 case SILC_PACKET_KEY_EXCHANGE:
1757 SILC_LOG_DEBUG(("KE packet"));
1758 if (packet->flags & SILC_PACKET_FLAG_LIST)
1761 if (sock->protocol && sock->protocol->protocol &&
1762 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1764 SilcServerKEInternalContext *proto_ctx =
1765 (SilcServerKEInternalContext *)sock->protocol->context;
1767 proto_ctx->packet = silc_packet_context_dup(packet);
1769 /* Let the protocol handle the packet */
1770 sock->protocol->execute(server->timeout_queue, 0,
1771 sock->protocol, sock->sock, 0, 100000);
1773 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1774 "protocol active, packet dropped."));
1776 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1780 case SILC_PACKET_KEY_EXCHANGE_1:
1781 SILC_LOG_DEBUG(("KE 1 packet"));
1782 if (packet->flags & SILC_PACKET_FLAG_LIST)
1785 if (sock->protocol && sock->protocol->protocol &&
1786 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1787 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1789 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1790 SilcServerRekeyInternalContext *proto_ctx =
1791 (SilcServerRekeyInternalContext *)sock->protocol->context;
1793 if (proto_ctx->packet)
1794 silc_packet_context_free(proto_ctx->packet);
1796 proto_ctx->packet = silc_packet_context_dup(packet);
1798 /* Let the protocol handle the packet */
1799 sock->protocol->execute(server->timeout_queue, 0,
1800 sock->protocol, sock->sock, 0, 0);
1802 SilcServerKEInternalContext *proto_ctx =
1803 (SilcServerKEInternalContext *)sock->protocol->context;
1805 if (proto_ctx->packet)
1806 silc_packet_context_free(proto_ctx->packet);
1808 proto_ctx->packet = silc_packet_context_dup(packet);
1809 proto_ctx->dest_id_type = packet->src_id_type;
1810 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1811 packet->src_id_type);
1812 if (!proto_ctx->dest_id)
1815 /* Let the protocol handle the packet */
1816 sock->protocol->execute(server->timeout_queue, 0,
1817 sock->protocol, sock->sock,
1821 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1822 "protocol active, packet dropped."));
1826 case SILC_PACKET_KEY_EXCHANGE_2:
1827 SILC_LOG_DEBUG(("KE 2 packet"));
1828 if (packet->flags & SILC_PACKET_FLAG_LIST)
1831 if (sock->protocol && sock->protocol->protocol &&
1832 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1833 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1835 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1836 SilcServerRekeyInternalContext *proto_ctx =
1837 (SilcServerRekeyInternalContext *)sock->protocol->context;
1839 if (proto_ctx->packet)
1840 silc_packet_context_free(proto_ctx->packet);
1842 proto_ctx->packet = silc_packet_context_dup(packet);
1844 /* Let the protocol handle the packet */
1845 sock->protocol->execute(server->timeout_queue, 0,
1846 sock->protocol, sock->sock, 0, 0);
1848 SilcServerKEInternalContext *proto_ctx =
1849 (SilcServerKEInternalContext *)sock->protocol->context;
1851 if (proto_ctx->packet)
1852 silc_packet_context_free(proto_ctx->packet);
1854 proto_ctx->packet = silc_packet_context_dup(packet);
1855 proto_ctx->dest_id_type = packet->src_id_type;
1856 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1857 packet->src_id_type);
1858 if (!proto_ctx->dest_id)
1861 /* Let the protocol handle the packet */
1862 sock->protocol->execute(server->timeout_queue, 0,
1863 sock->protocol, sock->sock,
1867 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1868 "protocol active, packet dropped."));
1872 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1874 * Connection authentication request packet. When we receive this packet
1875 * we will send to the other end information about our mandatory
1876 * authentication method for the connection. This packet maybe received
1879 SILC_LOG_DEBUG(("Connection authentication request packet"));
1880 if (packet->flags & SILC_PACKET_FLAG_LIST)
1882 silc_server_connection_auth_request(server, sock, packet);
1886 * Connection Authentication protocol packets
1888 case SILC_PACKET_CONNECTION_AUTH:
1889 /* Start of the authentication protocol. We receive here the
1890 authentication data and will verify it. */
1891 SILC_LOG_DEBUG(("Connection auth packet"));
1892 if (packet->flags & SILC_PACKET_FLAG_LIST)
1895 if (sock->protocol && sock->protocol->protocol->type
1896 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1898 SilcServerConnAuthInternalContext *proto_ctx =
1899 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1901 proto_ctx->packet = silc_packet_context_dup(packet);
1903 /* Let the protocol handle the packet */
1904 sock->protocol->execute(server->timeout_queue, 0,
1905 sock->protocol, sock->sock, 0, 0);
1907 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1908 "protocol active, packet dropped."));
1912 case SILC_PACKET_NEW_ID:
1914 * Received New ID packet. This includes some new ID that has been
1915 * created. It may be for client, server or channel. This is the way
1916 * to distribute information about new registered entities in the
1919 SILC_LOG_DEBUG(("New ID packet"));
1920 if (packet->flags & SILC_PACKET_FLAG_LIST)
1921 silc_server_new_id_list(server, sock, packet);
1923 silc_server_new_id(server, sock, packet);
1926 case SILC_PACKET_NEW_CLIENT:
1928 * Received new client packet. This includes client information that
1929 * we will use to create initial client ID. After creating new
1930 * ID we will send it to the client.
1932 SILC_LOG_DEBUG(("New Client packet"));
1933 if (packet->flags & SILC_PACKET_FLAG_LIST)
1935 silc_server_new_client(server, sock, packet);
1938 case SILC_PACKET_NEW_SERVER:
1940 * Received new server packet. This includes Server ID and some other
1941 * information that we may save. This is received after server has
1944 SILC_LOG_DEBUG(("New Server packet"));
1945 if (packet->flags & SILC_PACKET_FLAG_LIST)
1947 silc_server_new_server(server, sock, packet);
1950 case SILC_PACKET_NEW_CHANNEL:
1952 * Received new channel packet. Information about new channel in the
1953 * network are distributed using this packet.
1955 SILC_LOG_DEBUG(("New Channel packet"));
1956 if (packet->flags & SILC_PACKET_FLAG_LIST)
1957 silc_server_new_channel_list(server, sock, packet);
1959 silc_server_new_channel(server, sock, packet);
1962 case SILC_PACKET_HEARTBEAT:
1964 * Received heartbeat.
1966 SILC_LOG_DEBUG(("Heartbeat packet"));
1967 if (packet->flags & SILC_PACKET_FLAG_LIST)
1971 case SILC_PACKET_KEY_AGREEMENT:
1973 * Received heartbeat.
1975 SILC_LOG_DEBUG(("Key agreement packet"));
1976 if (packet->flags & SILC_PACKET_FLAG_LIST)
1978 silc_server_key_agreement(server, sock, packet);
1981 case SILC_PACKET_REKEY:
1983 * Received re-key packet. The sender wants to regenerate the session
1986 SILC_LOG_DEBUG(("Re-key packet"));
1987 if (packet->flags & SILC_PACKET_FLAG_LIST)
1989 silc_server_rekey(server, sock, packet);
1992 case SILC_PACKET_REKEY_DONE:
1994 * The re-key is done.
1996 SILC_LOG_DEBUG(("Re-key done packet"));
1997 if (packet->flags & SILC_PACKET_FLAG_LIST)
2000 if (sock->protocol && sock->protocol->protocol &&
2001 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2003 SilcServerRekeyInternalContext *proto_ctx =
2004 (SilcServerRekeyInternalContext *)sock->protocol->context;
2006 if (proto_ctx->packet)
2007 silc_packet_context_free(proto_ctx->packet);
2009 proto_ctx->packet = silc_packet_context_dup(packet);
2011 /* Let the protocol handle the packet */
2012 sock->protocol->execute(server->timeout_queue, 0,
2013 sock->protocol, sock->sock, 0, 0);
2015 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2016 "protocol active, packet dropped."));
2021 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2027 /* Creates connection to a remote router. */
2029 void silc_server_create_connection(SilcServer server,
2030 char *remote_host, uint32 port)
2032 SilcServerConnection sconn;
2034 /* Allocate connection object for hold connection specific stuff. */
2035 sconn = silc_calloc(1, sizeof(*sconn));
2036 sconn->server = server;
2037 sconn->remote_host = strdup(remote_host);
2038 sconn->remote_port = port;
2040 silc_task_register(server->timeout_queue, 0,
2041 silc_server_connect_router,
2042 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2043 SILC_TASK_PRI_NORMAL);
2046 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2048 silc_socket_free((SilcSocketConnection)context);
2051 /* Closes connection to socket connection */
2053 void silc_server_close_connection(SilcServer server,
2054 SilcSocketConnection sock)
2056 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2058 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2059 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2060 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2061 "Router"), sock->sock));
2063 /* We won't listen for this connection anymore */
2064 silc_schedule_unset_listen_fd(sock->sock);
2066 /* Unregister all tasks */
2067 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2068 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2070 /* Close the actual connection */
2071 silc_net_close_connection(sock->sock);
2072 server->sockets[sock->sock] = NULL;
2074 silc_task_register(server->timeout_queue, 0,
2075 silc_server_close_connection_final,
2076 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2077 SILC_TASK_PRI_NORMAL);
2080 /* Sends disconnect message to remote connection and disconnects the
2083 void silc_server_disconnect_remote(SilcServer server,
2084 SilcSocketConnection sock,
2085 const char *fmt, ...)
2088 unsigned char buf[4096];
2093 memset(buf, 0, sizeof(buf));
2095 vsprintf(buf, fmt, ap);
2098 SILC_LOG_DEBUG(("Disconnecting remote host"));
2100 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2102 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2103 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2104 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2107 /* Notify remote end that the conversation is over. The notify message
2108 is tried to be sent immediately. */
2109 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2110 buf, strlen(buf), TRUE);
2112 /* Mark the connection to be disconnected */
2113 SILC_SET_DISCONNECTED(sock);
2114 silc_server_close_connection(server, sock);
2119 SilcClientEntry client;
2120 } *FreeClientInternal;
2122 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2124 FreeClientInternal i = (FreeClientInternal)context;
2126 silc_idlist_del_data(i->client);
2127 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2131 /* Frees client data and notifies about client's signoff. */
2133 void silc_server_free_client_data(SilcServer server,
2134 SilcSocketConnection sock,
2135 SilcClientEntry client,
2139 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2141 /* If there is pending outgoing data for the client then purge it
2142 to the network before removing the client entry. */
2143 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2144 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2145 server->stat.packets_sent++;
2147 if (sock->outbuf->data - sock->outbuf->head)
2148 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2150 silc_packet_send(sock, TRUE);
2152 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2153 SILC_UNSET_OUTBUF_PENDING(sock);
2154 silc_buffer_clear(sock->outbuf);
2157 /* Send SIGNOFF notify to routers. */
2158 if (notify && !server->standalone && server->router)
2159 silc_server_send_notify_signoff(server, server->router->connection,
2160 server->server_type == SILC_SERVER ?
2161 FALSE : TRUE, client->id,
2162 SILC_ID_CLIENT_LEN, signoff);
2164 /* Remove client from all channels */
2166 silc_server_remove_from_channels(server, NULL, client,
2167 TRUE, signoff, TRUE);
2169 silc_server_remove_from_channels(server, NULL, client,
2170 FALSE, NULL, FALSE);
2172 /* We will not delete the client entry right away. We will take it
2173 into history (for WHOWAS command) for 5 minutes */
2176 silc_task_register(server->timeout_queue, 0,
2177 silc_server_free_client_data_timeout,
2179 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2180 client->data.registered = FALSE;
2182 /* Free the client entry and everything in it */
2183 server->stat.my_clients--;
2184 server->stat.clients--;
2185 if (server->server_type == SILC_ROUTER)
2186 server->stat.cell_clients--;
2189 /* Frees user_data pointer from socket connection object. This also sends
2190 appropriate notify packets to the network to inform about leaving
2193 void silc_server_free_sock_user_data(SilcServer server,
2194 SilcSocketConnection sock)
2196 SILC_LOG_DEBUG(("Start"));
2198 switch(sock->type) {
2199 case SILC_SOCKET_TYPE_CLIENT:
2201 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2202 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2205 case SILC_SOCKET_TYPE_SERVER:
2206 case SILC_SOCKET_TYPE_ROUTER:
2208 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2210 /* Free all client entries that this server owns as they will
2211 become invalid now as well. */
2212 silc_server_remove_clients_by_server(server, user_data, TRUE);
2214 /* If this was our primary router connection then we're lost to
2215 the outside world. */
2216 if (server->router == user_data) {
2217 server->id_entry->router = NULL;
2218 server->router = NULL;
2219 server->standalone = TRUE;
2222 /* Free the server entry */
2223 silc_idlist_del_data(user_data);
2224 silc_idlist_del_server(server->local_list, user_data);
2225 server->stat.my_servers--;
2226 server->stat.servers--;
2227 if (server->server_type == SILC_ROUTER)
2228 server->stat.cell_servers--;
2233 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2235 silc_idlist_del_data(user_data);
2236 silc_free(user_data);
2241 sock->user_data = NULL;
2244 /* This function is used to remove all client entries by the server `entry'.
2245 This is called when the connection is lost to the server. In this case
2246 we must invalidate all the client entries owned by the server `entry'.
2247 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2248 distributed to our local clients. */
2250 int silc_server_remove_clients_by_server(SilcServer server,
2251 SilcServerEntry entry,
2254 SilcIDCacheList list = NULL;
2255 SilcIDCacheEntry id_cache = NULL;
2256 SilcClientEntry client = NULL;
2258 SilcClientEntry *clients = NULL;
2259 uint32 clients_c = 0;
2260 unsigned char **argv = NULL;
2261 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2264 SILC_LOG_DEBUG(("Start"));
2266 if (server_signoff) {
2267 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2268 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2269 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2270 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2271 argv[argc] = idp->data;
2272 argv_lens[argc] = idp->len;
2273 argv_types[argc] = argc + 1;
2275 silc_buffer_free(idp);
2278 if (silc_idcache_find_by_id(server->local_list->clients,
2279 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2281 if (silc_idcache_list_first(list, &id_cache)) {
2283 client = (SilcClientEntry)id_cache->context;
2284 if (client->data.registered == FALSE) {
2285 if (!silc_idcache_list_next(list, &id_cache))
2291 if (client->router != entry) {
2292 if (server_signoff && client->connection) {
2293 clients = silc_realloc(clients,
2294 sizeof(*clients) * (clients_c + 1));
2295 clients[clients_c] = client;
2299 if (!silc_idcache_list_next(list, &id_cache))
2305 if (server_signoff) {
2306 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2307 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2308 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2310 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2312 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2313 memcpy(argv[argc], idp->data, idp->len);
2314 argv_lens[argc] = idp->len;
2315 argv_types[argc] = argc + 1;
2317 silc_buffer_free(idp);
2320 /* Remove the client entry */
2321 silc_server_remove_from_channels(server, NULL, client, FALSE,
2323 silc_idlist_del_client(server->local_list, client);
2325 if (!silc_idcache_list_next(list, &id_cache))
2329 silc_idcache_list_free(list);
2332 if (silc_idcache_find_by_id(server->global_list->clients,
2333 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2335 if (silc_idcache_list_first(list, &id_cache)) {
2337 client = (SilcClientEntry)id_cache->context;
2338 if (client->data.registered == FALSE) {
2339 if (!silc_idcache_list_next(list, &id_cache))
2345 if (client->router != entry) {
2346 if (server_signoff && client->connection) {
2347 clients = silc_realloc(clients,
2348 sizeof(*clients) * (clients_c + 1));
2349 clients[clients_c] = client;
2353 if (!silc_idcache_list_next(list, &id_cache))
2359 if (server_signoff) {
2360 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2361 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2362 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2364 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2366 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2367 memcpy(argv[argc], idp->data, idp->len);
2368 argv_lens[argc] = idp->len;
2369 argv_types[argc] = argc + 1;
2371 silc_buffer_free(idp);
2374 /* Remove the client entry */
2375 silc_server_remove_from_channels(server, NULL, client, FALSE,
2377 silc_idlist_del_client(server->global_list, client);
2379 if (!silc_idcache_list_next(list, &id_cache))
2383 silc_idcache_list_free(list);
2386 /* Send the SERVER_SIGNOFF notify */
2387 if (server_signoff) {
2390 /* Send SERVER_SIGNOFF notify to our primary router */
2391 if (!server->standalone && server->router) {
2392 args = silc_argument_payload_encode(1, argv, argv_lens,
2394 silc_server_send_notify_args(server,
2395 server->router->connection,
2396 server->server_type == SILC_SERVER ?
2398 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2400 silc_buffer_free(args);
2403 args = silc_argument_payload_encode(argc, argv, argv_lens,
2405 /* Send to local clients */
2406 for (i = 0; i < clients_c; i++) {
2407 silc_server_send_notify_args(server, clients[i]->connection,
2408 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2413 silc_buffer_free(args);
2415 silc_free(argv_lens);
2416 silc_free(argv_types);
2422 /* Checks whether given channel has global users. If it does this returns
2423 TRUE and FALSE if there is only locally connected clients on the channel. */
2425 int silc_server_channel_has_global(SilcChannelEntry channel)
2427 SilcChannelClientEntry chl;
2429 silc_list_start(channel->user_list);
2430 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2431 if (chl->client->router)
2438 /* Checks whether given channel has locally connected users. If it does this
2439 returns TRUE and FALSE if there is not one locally connected client. */
2441 int silc_server_channel_has_local(SilcChannelEntry channel)
2443 SilcChannelClientEntry chl;
2445 silc_list_start(channel->user_list);
2446 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2447 if (!chl->client->router)
2454 /* Removes client from all channels it has joined. This is used when client
2455 connection is disconnected. If the client on a channel is last, the
2456 channel is removed as well. This sends the SIGNOFF notify types. */
2458 void silc_server_remove_from_channels(SilcServer server,
2459 SilcSocketConnection sock,
2460 SilcClientEntry client,
2462 char *signoff_message,
2465 SilcChannelEntry channel;
2466 SilcChannelClientEntry chl;
2469 SILC_LOG_DEBUG(("Start"));
2471 if (!client || !client->id)
2474 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2476 /* Remove the client from all channels. The client is removed from
2477 the channels' user list. */
2478 silc_list_start(client->channels);
2479 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2480 channel = chl->channel;
2482 /* Remove channel from client's channel list */
2483 silc_list_del(client->channels, chl);
2485 /* Remove channel if there is no users anymore */
2486 if (server->server_type == SILC_ROUTER &&
2487 silc_list_count(channel->user_list) < 2) {
2488 server->stat.my_channels--;
2491 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2493 if (channel->founder_key) {
2494 /* The founder auth data exists, do not remove the channel entry */
2495 SilcChannelClientEntry chl2;
2499 silc_list_start(channel->user_list);
2500 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2501 silc_list_del(chl2->client->channels, chl2);
2502 silc_list_del(channel->user_list, chl2);
2508 if (!silc_idlist_del_channel(server->local_list, channel))
2509 silc_idlist_del_channel(server->global_list, channel);
2513 /* Remove client from channel's client list */
2514 silc_list_del(channel->user_list, chl);
2516 server->stat.my_chanclients--;
2518 /* If there is no global users on the channel anymore mark the channel
2519 as local channel. */
2520 if (server->server_type == SILC_SERVER &&
2521 !silc_server_channel_has_global(channel))
2522 channel->global_users = FALSE;
2524 /* If there is not at least one local user on the channel then we don't
2525 need the channel entry anymore, we can remove it safely. */
2526 if (server->server_type == SILC_SERVER &&
2527 !silc_server_channel_has_local(channel)) {
2528 /* Notify about leaving client if this channel has global users. */
2529 if (notify && channel->global_users)
2530 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2531 SILC_NOTIFY_TYPE_SIGNOFF,
2532 signoff_message ? 2 : 1,
2533 clidp->data, clidp->len,
2534 signoff_message, signoff_message ?
2535 strlen(signoff_message) : 0);
2537 server->stat.my_channels--;
2540 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2542 if (channel->founder_key) {
2543 /* The founder auth data exists, do not remove the channel entry */
2544 SilcChannelClientEntry chl2;
2548 silc_list_start(channel->user_list);
2549 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2550 silc_list_del(chl2->client->channels, chl2);
2551 silc_list_del(channel->user_list, chl2);
2557 if (!silc_idlist_del_channel(server->local_list, channel))
2558 silc_idlist_del_channel(server->global_list, channel);
2562 /* Send notify to channel about client leaving SILC and thus
2563 the entire channel. */
2565 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2566 SILC_NOTIFY_TYPE_SIGNOFF,
2567 signoff_message ? 2 : 1,
2568 clidp->data, clidp->len,
2569 signoff_message, signoff_message ?
2570 strlen(signoff_message) : 0);
2572 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2573 /* Re-generate channel key */
2574 silc_server_create_channel_key(server, channel, 0);
2576 /* Send the channel key to the channel. The key of course is not sent
2577 to the client who was removed from the channel. */
2578 silc_server_send_channel_key(server, client->connection, channel,
2579 server->server_type == SILC_ROUTER ?
2580 FALSE : !server->standalone);
2584 silc_buffer_free(clidp);
2587 /* Removes client from one channel. This is used for example when client
2588 calls LEAVE command to remove itself from the channel. Returns TRUE
2589 if channel still exists and FALSE if the channel is removed when
2590 last client leaves the channel. If `notify' is FALSE notify messages
2593 int silc_server_remove_from_one_channel(SilcServer server,
2594 SilcSocketConnection sock,
2595 SilcChannelEntry channel,
2596 SilcClientEntry client,
2599 SilcChannelEntry ch;
2600 SilcChannelClientEntry chl;
2603 SILC_LOG_DEBUG(("Start"));
2605 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2607 /* Remove the client from the channel. The client is removed from
2608 the channel's user list. */
2609 silc_list_start(client->channels);
2610 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2611 if (chl->channel != channel)
2616 /* Remove channel from client's channel list */
2617 silc_list_del(client->channels, chl);
2619 /* Remove channel if there is no users anymore */
2620 if (server->server_type == SILC_ROUTER &&
2621 silc_list_count(channel->user_list) < 2) {
2623 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2624 if (!silc_idlist_del_channel(server->local_list, channel))
2625 silc_idlist_del_channel(server->global_list, channel);
2626 silc_buffer_free(clidp);
2627 server->stat.my_channels--;
2631 /* Remove client from channel's client list */
2632 silc_list_del(channel->user_list, chl);
2634 server->stat.my_chanclients--;
2636 /* If there is no global users on the channel anymore mark the channel
2637 as local channel. */
2638 if (server->server_type == SILC_SERVER &&
2639 !silc_server_channel_has_global(channel))
2640 channel->global_users = FALSE;
2642 /* If there is not at least one local user on the channel then we don't
2643 need the channel entry anymore, we can remove it safely. */
2644 if (server->server_type == SILC_SERVER &&
2645 !silc_server_channel_has_local(channel)) {
2646 /* Notify about leaving client if this channel has global users. */
2647 if (notify && channel->global_users)
2648 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2649 SILC_NOTIFY_TYPE_LEAVE, 1,
2650 clidp->data, clidp->len);
2652 server->stat.my_channels--;
2653 silc_buffer_free(clidp);
2656 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2658 if (channel->founder_key) {
2659 /* The founder auth data exists, do not remove the channel entry */
2660 SilcChannelClientEntry chl2;
2664 silc_list_start(channel->user_list);
2665 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2666 silc_list_del(chl2->client->channels, chl2);
2667 silc_list_del(channel->user_list, chl2);
2673 if (!silc_idlist_del_channel(server->local_list, channel))
2674 silc_idlist_del_channel(server->global_list, channel);
2678 /* Send notify to channel about client leaving the channel */
2680 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2681 SILC_NOTIFY_TYPE_LEAVE, 1,
2682 clidp->data, clidp->len);
2686 silc_buffer_free(clidp);
2690 /* Returns TRUE if the given client is on the channel. FALSE if not.
2691 This works because we assure that the user list on the channel is
2692 always in up to date thus we can only check the channel list from
2693 `client' which is faster than checking the user list from `channel'. */
2695 int silc_server_client_on_channel(SilcClientEntry client,
2696 SilcChannelEntry channel)
2698 SilcChannelClientEntry chl;
2700 if (!client || !channel)
2703 silc_list_start(client->channels);
2704 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2705 if (chl->channel == channel)
2711 /* Timeout callback. This is called if connection is idle or for some
2712 other reason is not responding within some period of time. This
2713 disconnects the remote end. */
2715 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2717 SilcServer server = (SilcServer)context;
2718 SilcSocketConnection sock = server->sockets[fd];
2723 if (sock->user_data)
2724 silc_server_free_sock_user_data(server, sock);
2726 silc_server_disconnect_remote(server, sock,
2727 "Server closed connection: "
2728 "Connection timeout");
2731 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2732 function may be used only by router. In real SILC network all channels
2733 are created by routers thus this function is never used by normal
2736 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2737 SilcServerID *router_id,
2743 SilcChannelID *channel_id;
2744 SilcChannelEntry entry;
2748 SILC_LOG_DEBUG(("Creating new channel"));
2751 cipher = "aes-256-cbc";
2753 hmac = "hmac-sha1-96";
2755 /* Allocate cipher */
2756 if (!silc_cipher_alloc(cipher, &key))
2760 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2761 silc_cipher_free(key);
2765 channel_name = strdup(channel_name);
2767 /* Create the channel */
2768 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2769 entry = silc_idlist_add_channel(server->local_list, channel_name,
2770 SILC_CHANNEL_MODE_NONE, channel_id,
2771 NULL, key, newhmac);
2773 silc_free(channel_name);
2777 entry->cipher = strdup(cipher);
2778 entry->hmac_name = strdup(hmac);
2780 /* Now create the actual key material */
2781 silc_server_create_channel_key(server, entry,
2782 silc_cipher_get_key_len(key) / 8);
2784 /* Notify other routers about the new channel. We send the packet
2785 to our primary route. */
2786 if (broadcast && server->standalone == FALSE)
2787 silc_server_send_new_channel(server, server->router->connection, TRUE,
2788 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2791 server->stat.my_channels++;
2796 /* Same as above but creates the channel with Channel ID `channel_id. */
2799 silc_server_create_new_channel_with_id(SilcServer server,
2803 SilcChannelID *channel_id,
2806 SilcChannelEntry entry;
2810 SILC_LOG_DEBUG(("Creating new channel"));
2813 cipher = "aes-256-cbc";
2815 hmac = "hmac-sha1-96";
2817 /* Allocate cipher */
2818 if (!silc_cipher_alloc(cipher, &key))
2822 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2823 silc_cipher_free(key);
2827 channel_name = strdup(channel_name);
2829 /* Create the channel */
2830 entry = silc_idlist_add_channel(server->local_list, channel_name,
2831 SILC_CHANNEL_MODE_NONE, channel_id,
2832 NULL, key, newhmac);
2834 silc_free(channel_name);
2838 /* Now create the actual key material */
2839 silc_server_create_channel_key(server, entry,
2840 silc_cipher_get_key_len(key) / 8);
2842 /* Notify other routers about the new channel. We send the packet
2843 to our primary route. */
2844 if (broadcast && server->standalone == FALSE)
2845 silc_server_send_new_channel(server, server->router->connection, TRUE,
2846 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2849 server->stat.my_channels++;
2854 /* Channel's key re-key timeout callback. */
2856 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2858 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2859 SilcServer server = (SilcServer)rekey->context;
2861 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2862 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2864 silc_task_register(server->timeout_queue, 0,
2865 silc_server_channel_key_rekey,
2866 (void *)rekey, 3600, 0,
2868 SILC_TASK_PRI_NORMAL);
2871 /* Generates new channel key. This is used to create the initial channel key
2872 but also to re-generate new key for channel. If `key_len' is provided
2873 it is the bytes of the key length. */
2875 void silc_server_create_channel_key(SilcServer server,
2876 SilcChannelEntry channel,
2880 unsigned char channel_key[32], hash[32];
2883 SILC_LOG_DEBUG(("Generating channel key"));
2885 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2886 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2890 if (!channel->channel_key)
2891 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2896 else if (channel->key_len)
2897 len = channel->key_len / 8;
2899 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2901 /* Create channel key */
2902 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2905 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2907 /* Remove old key if exists */
2909 memset(channel->key, 0, channel->key_len / 8);
2910 silc_free(channel->key);
2914 channel->key_len = len * 8;
2915 channel->key = silc_calloc(len, sizeof(*channel->key));
2916 memcpy(channel->key, channel_key, len);
2917 memset(channel_key, 0, sizeof(channel_key));
2919 /* Generate HMAC key from the channel key data and set it */
2921 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2922 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2923 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2924 memset(hash, 0, sizeof(hash));
2926 if (server->server_type == SILC_ROUTER) {
2927 if (!channel->rekey)
2928 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2929 channel->rekey->context = (void *)server;
2930 channel->rekey->channel = channel;
2931 channel->rekey->key_len = key_len;
2933 silc_task_unregister_by_callback(server->timeout_queue,
2934 silc_server_channel_key_rekey);
2935 silc_task_register(server->timeout_queue, 0,
2936 silc_server_channel_key_rekey,
2937 (void *)channel->rekey, 3600, 0,
2939 SILC_TASK_PRI_NORMAL);
2943 /* Saves the channel key found in the encoded `key_payload' buffer. This
2944 function is used when we receive Channel Key Payload and also when we're
2945 processing JOIN command reply. Returns entry to the channel. */
2947 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2948 SilcBuffer key_payload,
2949 SilcChannelEntry channel)
2951 SilcChannelKeyPayload payload = NULL;
2952 SilcChannelID *id = NULL;
2953 unsigned char *tmp, hash[32];
2957 SILC_LOG_DEBUG(("Start"));
2959 /* Decode channel key payload */
2960 payload = silc_channel_key_payload_parse(key_payload);
2962 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2967 /* Get the channel entry */
2970 /* Get channel ID */
2971 tmp = silc_channel_key_get_id(payload, &tmp_len);
2972 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2978 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2980 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2982 SILC_LOG_ERROR(("Received key for non-existent channel"));
2988 tmp = silc_channel_key_get_key(payload, &tmp_len);
2994 cipher = silc_channel_key_get_cipher(payload, NULL);
3000 /* Remove old key if exists */
3002 memset(channel->key, 0, channel->key_len / 8);
3003 silc_free(channel->key);
3004 silc_cipher_free(channel->channel_key);
3007 /* Create new cipher */
3008 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3013 if (channel->cipher)
3014 silc_free(channel->cipher);
3015 channel->cipher = strdup(cipher);
3018 channel->key_len = tmp_len * 8;
3019 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3020 memcpy(channel->key, tmp, tmp_len);
3021 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3023 /* Generate HMAC key from the channel key data and set it */
3025 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3026 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3027 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3029 memset(hash, 0, sizeof(hash));
3030 memset(tmp, 0, tmp_len);
3032 if (server->server_type == SILC_ROUTER) {
3033 if (!channel->rekey)
3034 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3035 channel->rekey->context = (void *)server;
3036 channel->rekey->channel = channel;
3038 silc_task_unregister_by_callback(server->timeout_queue,
3039 silc_server_channel_key_rekey);
3040 silc_task_register(server->timeout_queue, 0,
3041 silc_server_channel_key_rekey,
3042 (void *)channel->rekey, 3600, 0,
3044 SILC_TASK_PRI_NORMAL);
3051 silc_channel_key_payload_free(payload);
3056 /* Heartbeat callback. This function is set as argument for the
3057 silc_socket_set_heartbeat function. The library will call this function
3058 at the set time interval. */
3060 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3063 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3065 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3068 /* Send the heartbeat */
3069 silc_server_send_heartbeat(hb->server, sock);
3072 /* Returns assembled of all servers in the given ID list. The packet's
3073 form is dictated by the New ID payload. */
3075 static void silc_server_announce_get_servers(SilcServer server,
3077 SilcBuffer *servers)
3079 SilcIDCacheList list;
3080 SilcIDCacheEntry id_cache;
3081 SilcServerEntry entry;
3084 /* Go through all clients in the list */
3085 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3086 SILC_ID_SERVER, &list)) {
3087 if (silc_idcache_list_first(list, &id_cache)) {
3089 entry = (SilcServerEntry)id_cache->context;
3091 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3093 *servers = silc_buffer_realloc(*servers,
3095 (*servers)->truelen + idp->len :
3097 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3098 silc_buffer_put(*servers, idp->data, idp->len);
3099 silc_buffer_pull(*servers, idp->len);
3100 silc_buffer_free(idp);
3102 if (!silc_idcache_list_next(list, &id_cache))
3107 silc_idcache_list_free(list);
3111 /* This function is used by router to announce existing servers to our
3112 primary router when we've connected to it. */
3114 void silc_server_announce_servers(SilcServer server)
3116 SilcBuffer servers = NULL;
3118 SILC_LOG_DEBUG(("Announcing servers"));
3120 /* Get servers in local list */
3121 silc_server_announce_get_servers(server, server->local_list, &servers);
3123 /* Get servers in global list */
3124 silc_server_announce_get_servers(server, server->global_list, &servers);
3127 silc_buffer_push(servers, servers->data - servers->head);
3128 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3130 /* Send the packet */
3131 silc_server_packet_send(server, server->router->connection,
3132 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3133 servers->data, servers->len, TRUE);
3135 silc_buffer_free(servers);
3139 /* Returns assembled packet of all clients in the given ID list. The
3140 packet's form is dictated by the New ID Payload. */
3142 static void silc_server_announce_get_clients(SilcServer server,
3144 SilcBuffer *clients)
3146 SilcIDCacheList list;
3147 SilcIDCacheEntry id_cache;
3148 SilcClientEntry client;
3151 /* Go through all clients in the list */
3152 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3153 SILC_ID_CLIENT, &list)) {
3154 if (silc_idcache_list_first(list, &id_cache)) {
3156 client = (SilcClientEntry)id_cache->context;
3158 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3160 *clients = silc_buffer_realloc(*clients,
3162 (*clients)->truelen + idp->len :
3164 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3165 silc_buffer_put(*clients, idp->data, idp->len);
3166 silc_buffer_pull(*clients, idp->len);
3167 silc_buffer_free(idp);
3169 if (!silc_idcache_list_next(list, &id_cache))
3174 silc_idcache_list_free(list);
3178 /* This function is used to announce our existing clients to our router
3179 when we've connected to it. */
3181 void silc_server_announce_clients(SilcServer server)
3183 SilcBuffer clients = NULL;
3185 SILC_LOG_DEBUG(("Announcing clients"));
3187 /* Get clients in local list */
3188 silc_server_announce_get_clients(server, server->local_list,
3191 /* As router we announce our global list as well */
3192 if (server->server_type == SILC_ROUTER)
3193 silc_server_announce_get_clients(server, server->global_list,
3197 silc_buffer_push(clients, clients->data - clients->head);
3198 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3200 /* Send the packet */
3201 silc_server_packet_send(server, server->router->connection,
3202 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3203 clients->data, clients->len, TRUE);
3205 silc_buffer_free(clients);
3210 silc_server_announce_encode_join(uint32 argc, ...)
3215 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3218 /* Returns assembled packets for channel users of the `channel'. */
3220 void silc_server_announce_get_channel_users(SilcServer server,
3221 SilcChannelEntry channel,
3222 SilcBuffer *channel_users)
3224 SilcChannelClientEntry chl;
3225 SilcBuffer chidp, clidp;
3229 SILC_LOG_DEBUG(("Start"));
3231 /* Now find all users on the channel */
3232 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3233 silc_list_start(channel->user_list);
3234 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3235 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3236 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3237 chidp->data, chidp->len);
3240 silc_buffer_realloc(*channel_users,
3242 (*channel_users)->truelen + len : len));
3243 silc_buffer_pull_tail(*channel_users,
3244 ((*channel_users)->end -
3245 (*channel_users)->data));
3247 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3248 silc_buffer_pull(*channel_users, len);
3249 silc_buffer_free(clidp);
3250 silc_buffer_free(tmp);
3252 silc_buffer_free(chidp);
3255 /* Returns assembled packets for all channels and users on those channels
3256 from the given ID List. The packets are in the form dictated by the
3257 New Channel and New Channel User payloads. */
3259 void silc_server_announce_get_channels(SilcServer server,
3261 SilcBuffer *channels,
3262 SilcBuffer *channel_users)
3264 SilcIDCacheList list;
3265 SilcIDCacheEntry id_cache;
3266 SilcChannelEntry channel;
3271 SILC_LOG_DEBUG(("Start"));
3273 /* Go through all channels in the list */
3274 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3275 SILC_ID_CHANNEL, &list)) {
3276 if (silc_idcache_list_first(list, &id_cache)) {
3278 channel = (SilcChannelEntry)id_cache->context;
3280 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3281 name_len = strlen(channel->channel_name);
3283 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3285 silc_buffer_realloc(*channels,
3286 (*channels ? (*channels)->truelen + len : len));
3287 silc_buffer_pull_tail(*channels,
3288 ((*channels)->end - (*channels)->data));
3289 silc_buffer_format(*channels,
3290 SILC_STR_UI_SHORT(name_len),
3291 SILC_STR_UI_XNSTRING(channel->channel_name,
3293 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3294 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3295 SILC_STR_UI_INT(channel->mode),
3297 silc_buffer_pull(*channels, len);
3299 silc_server_announce_get_channel_users(server, channel,
3304 if (!silc_idcache_list_next(list, &id_cache))
3309 silc_idcache_list_free(list);
3313 /* This function is used to announce our existing channels to our router
3314 when we've connected to it. This also announces the users on the
3315 channels to the router. */
3317 void silc_server_announce_channels(SilcServer server)
3319 SilcBuffer channels = NULL, channel_users = NULL;
3321 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3323 /* Get channels and channel users in local list */
3324 silc_server_announce_get_channels(server, server->local_list,
3325 &channels, &channel_users);
3327 /* Get channels and channel users in global list */
3328 silc_server_announce_get_channels(server, server->global_list,
3329 &channels, &channel_users);
3332 silc_buffer_push(channels, channels->data - channels->head);
3333 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3335 /* Send the packet */
3336 silc_server_packet_send(server, server->router->connection,
3337 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3338 channels->data, channels->len,
3341 silc_buffer_free(channels);
3344 if (channel_users) {
3345 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3346 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3347 channel_users->len);
3349 /* Send the packet */
3350 silc_server_packet_send(server, server->router->connection,
3351 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3352 channel_users->data, channel_users->len,
3355 silc_buffer_free(channel_users);
3359 /* Failure timeout callback. If this is called then we will immediately
3360 process the received failure. We always process the failure with timeout
3361 since we do not want to blindly trust to received failure packets.
3362 This won't be called (the timeout is cancelled) if the failure was
3363 bogus (it is bogus if remote does not close the connection after sending
3366 SILC_TASK_CALLBACK(silc_server_failure_callback)
3368 SilcServerFailureContext f = (SilcServerFailureContext)context;
3370 if (f->sock->protocol) {
3371 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3372 f->sock->protocol->execute(f->server->timeout_queue, 0,
3373 f->sock->protocol, f->sock->sock, 0, 0);
3379 /* Assembles user list and users mode list from the `channel'. */
3381 void silc_server_get_users_on_channel(SilcServer server,
3382 SilcChannelEntry channel,
3383 SilcBuffer *user_list,
3384 SilcBuffer *mode_list,
3387 SilcChannelClientEntry chl;
3388 SilcBuffer client_id_list;
3389 SilcBuffer client_mode_list;
3391 uint32 list_count = 0;
3393 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3394 silc_list_count(channel->user_list));
3395 client_mode_list = silc_buffer_alloc(4 *
3396 silc_list_count(channel->user_list));
3397 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3398 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3399 silc_list_start(channel->user_list);
3400 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3402 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3403 silc_buffer_put(client_id_list, idp->data, idp->len);
3404 silc_buffer_pull(client_id_list, idp->len);
3405 silc_buffer_free(idp);
3407 /* Client's mode on channel */
3408 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3409 silc_buffer_pull(client_mode_list, 4);
3413 silc_buffer_push(client_id_list,
3414 client_id_list->data - client_id_list->head);
3415 silc_buffer_push(client_mode_list,
3416 client_mode_list->data - client_mode_list->head);
3418 *user_list = client_id_list;
3419 *mode_list = client_mode_list;
3420 *user_count = list_count;
3423 /* Saves users and their modes to the `channel'. */
3425 void silc_server_save_users_on_channel(SilcServer server,
3426 SilcSocketConnection sock,
3427 SilcChannelEntry channel,
3428 SilcClientID *noadd,
3429 SilcBuffer user_list,
3430 SilcBuffer mode_list,
3435 /* Cache the received Client ID's and modes. This cache expires
3436 whenever server sends notify message to channel. It means two things;
3437 some user has joined or leaved the channel. XXX TODO! */
3438 for (i = 0; i < user_count; i++) {
3441 SilcClientID *client_id;
3442 SilcClientEntry client;
3445 SILC_GET16_MSB(idp_len, user_list->data + 2);
3447 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3448 silc_buffer_pull(user_list, idp_len);
3453 SILC_GET32_MSB(mode, mode_list->data);
3454 silc_buffer_pull(mode_list, 4);
3456 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3457 silc_free(client_id);
3461 /* Check if we have this client cached already. */
3462 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3465 client = silc_idlist_find_client_by_id(server->global_list,
3468 /* If router did not find such Client ID in its lists then this must
3469 be bogus client or some router in the net is buggy. */
3470 if (server->server_type == SILC_ROUTER) {
3471 silc_free(client_id);
3475 /* We don't have that client anywhere, add it. The client is added
3476 to global list since server didn't have it in the lists so it must be
3478 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3480 silc_id_dup(client_id, SILC_ID_CLIENT),
3481 sock->user_data, NULL);
3483 silc_free(client_id);
3487 client->data.registered = TRUE;
3490 silc_free(client_id);
3492 if (!silc_server_client_on_channel(client, channel)) {
3493 /* Client was not on the channel, add it. */
3494 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3495 chl->client = client;
3497 chl->channel = channel;
3498 silc_list_add(channel->user_list, chl);
3499 silc_list_add(client->channels, chl);
3504 /* Lookups route to the client indicated by the `id_data'. The connection
3505 object and internal data object is returned. Returns NULL if route
3506 could not be found to the client. If the `client_id' is specified then
3507 it is used and the `id_data' is ignored. */
3509 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3510 unsigned char *id_data,
3512 SilcClientID *client_id,
3513 SilcIDListData *idata)
3516 SilcClientEntry client;
3518 SILC_LOG_DEBUG(("Start"));
3520 /* Decode destination Client ID */
3522 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3524 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3528 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3531 /* If the destination belongs to our server we don't have to route
3532 the packet anywhere but to send it to the local destination. */
3533 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3537 if (client && client->data.registered == FALSE)
3540 /* If we are router and the client has router then the client is in
3541 our cell but not directly connected to us. */
3542 if (server->server_type == SILC_ROUTER && client->router) {
3543 /* We are of course in this case the client's router thus the real
3544 "router" of the client is the server who owns the client. Thus
3545 we will send the packet to that server. */
3547 *idata = (SilcIDListData)client->router;
3548 return client->router->connection;
3551 /* Seems that client really is directly connected to us */
3553 *idata = (SilcIDListData)client;
3554 return client->connection;
3557 /* Destination belongs to someone not in this server. If we are normal
3558 server our action is to send the packet to our router. */
3559 if (server->server_type == SILC_SERVER && !server->standalone) {
3562 *idata = (SilcIDListData)server->router;
3563 return server->router->connection;
3566 /* We are router and we will perform route lookup for the destination
3567 and send the packet to fastest route. */
3568 if (server->server_type == SILC_ROUTER && !server->standalone) {
3569 /* Check first that the ID is valid */
3570 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3572 SilcSocketConnection dst_sock;
3574 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3578 *idata = (SilcIDListData)dst_sock->user_data;
3587 /* Encodes and returns channel list of channels the `client' has joined.
3588 Secret channels are not put to the list. */
3590 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3591 SilcClientEntry client)
3593 SilcBuffer buffer = NULL;
3594 SilcChannelEntry channel;
3595 SilcChannelClientEntry chl;
3600 silc_list_start(client->channels);
3601 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3602 channel = chl->channel;
3604 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3607 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3608 name_len = strlen(channel->channel_name);
3610 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3611 buffer = silc_buffer_realloc(buffer,
3612 (buffer ? (buffer)->truelen + len : len));
3613 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3614 silc_buffer_format(buffer,
3615 SILC_STR_UI_SHORT(name_len),
3616 SILC_STR_UI_XNSTRING(channel->channel_name,
3618 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3619 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3620 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3622 silc_buffer_pull(buffer, len);
3627 silc_buffer_push(buffer, buffer->data - buffer->head);
3632 /* Finds client entry by Client ID and if it is not found then resolves
3633 it using WHOIS command. */
3635 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3636 SilcClientID *client_id)
3638 SilcClientEntry client;
3640 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3642 client = silc_idlist_find_client_by_id(server->global_list,
3644 if (!client && server->server_type == SILC_ROUTER)
3648 if (!client && server->standalone)
3651 if (!client || !client->nickname || !client->username) {
3652 SilcBuffer buffer, idp;
3654 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3655 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3656 ++server->cmd_ident, 1,
3657 3, idp->data, idp->len);
3658 silc_server_packet_send(server, client ? client->router->connection :
3659 server->router->connection,
3660 SILC_PACKET_COMMAND, 0,
3661 buffer->data, buffer->len, FALSE);
3662 silc_buffer_free(idp);
3663 silc_buffer_free(buffer);
3669 /* A timeout callback for the re-key. We will be the initiator of the
3672 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3674 SilcSocketConnection sock = (SilcSocketConnection)context;
3675 SilcIDListData idata = (SilcIDListData)sock->user_data;
3676 SilcServer server = (SilcServer)idata->rekey->context;
3677 SilcProtocol protocol;
3678 SilcServerRekeyInternalContext *proto_ctx;
3680 SILC_LOG_DEBUG(("Start"));
3682 /* Allocate internal protocol context. This is sent as context
3684 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3685 proto_ctx->server = (void *)server;
3686 proto_ctx->sock = sock;
3687 proto_ctx->responder = FALSE;
3688 proto_ctx->pfs = idata->rekey->pfs;
3690 /* Perform rekey protocol. Will call the final callback after the
3691 protocol is over. */
3692 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3693 &protocol, proto_ctx, silc_server_rekey_final);
3694 sock->protocol = protocol;
3696 /* Run the protocol */
3697 protocol->execute(server->timeout_queue, 0, protocol,
3700 /* Re-register re-key timeout */
3701 silc_task_register(server->timeout_queue, sock->sock,
3702 silc_server_rekey_callback,
3703 context, idata->rekey->timeout, 0,
3704 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3707 /* The final callback for the REKEY protocol. This will actually take the
3708 new key material into use. */
3710 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3712 SilcProtocol protocol = (SilcProtocol)context;
3713 SilcServerRekeyInternalContext *ctx =
3714 (SilcServerRekeyInternalContext *)protocol->context;
3715 SilcServer server = (SilcServer)ctx->server;
3716 SilcSocketConnection sock = ctx->sock;
3718 SILC_LOG_DEBUG(("Start"));
3720 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3721 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3722 /* Error occured during protocol */
3723 silc_protocol_cancel(server->timeout_queue, protocol);
3724 silc_protocol_free(protocol);
3725 sock->protocol = NULL;
3727 silc_packet_context_free(ctx->packet);
3729 silc_ske_free(ctx->ske);
3735 silc_protocol_free(protocol);
3736 sock->protocol = NULL;
3738 silc_packet_context_free(ctx->packet);
3740 silc_ske_free(ctx->ske);