5 Author: Pekka Riikonen <priikone@silcnet.org>
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 if (!silc_server_config_register_ciphers(server->config))
149 silc_cipher_register_default();
150 if (!silc_server_config_register_pkcs(server->config))
151 silc_pkcs_register_default();
152 if (!silc_server_config_register_hashfuncs(server->config))
153 silc_hash_register_default();
154 if (!silc_server_config_register_hmacs(server->config))
155 silc_hmac_register_default();
157 /* Initialize random number generator for the server. */
158 server->rng = silc_rng_alloc();
159 silc_rng_init(server->rng);
160 silc_rng_global_init(server->rng);
162 /* Initialize hash functions for server to use */
163 silc_hash_alloc("md5", &server->md5hash);
164 silc_hash_alloc("sha1", &server->sha1hash);
166 /* Initialize none cipher */
167 silc_cipher_alloc("none", &server->none_cipher);
169 /* Create a listening server. Note that our server can listen on
170 multiple ports. All listeners are created here and now. */
171 /* XXX Still check this whether to use server_info or listen_port. */
173 while(server->config->listen_port) {
176 tmp = silc_net_create_server(server->config->listen_port->port,
177 server->config->listen_port->host);
181 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
182 sock[sock_count] = tmp;
183 server->config->listen_port = server->config->listen_port->next;
187 /* Initialize ID caches */
188 server->local_list->clients =
189 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
190 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
191 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
193 /* These are allocated for normal server as well as these hold some
194 global information that the server has fetched from its router. For
195 router these are used as they are supposed to be used on router. */
196 server->global_list->clients =
197 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
198 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
199 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
201 /* Allocate the entire socket list that is used in server. Eventually
202 all connections will have entry in this table (it is a table of
203 pointers to the actual object that is allocated individually
205 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
206 sizeof(*server->sockets));
208 for (i = 0; i < sock_count; i++) {
209 SilcSocketConnection newsocket = NULL;
211 /* Set socket to non-blocking mode */
212 silc_net_set_socket_nonblock(sock[i]);
213 server->sock = sock[i];
215 /* Create a Server ID for the server. */
216 silc_id_create_server_id(sock[i], server->rng, &id);
222 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
223 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
224 server->id_type = SILC_ID_SERVER;
225 server->server_name = server->config->server_info->server_name;
227 /* Add ourselves to the server list. We don't have a router yet
228 beacuse we haven't established a route yet. It will be done later.
229 For now, NULL is sent as router. This allocates new entry to
232 silc_idlist_add_server(server->local_list,
233 server->config->server_info->server_name,
234 server->server_type, server->id, NULL, NULL);
236 SILC_LOG_ERROR(("Could not add ourselves to cache"));
240 /* Add ourselves also to the socket table. The entry allocated above
241 is sent as argument for fast referencing in the future. */
242 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
245 server->sockets[sock[i]] = newsocket;
247 /* Perform name and address lookups to resolve the listenning address
249 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
251 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
253 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
254 newsocket->hostname ? newsocket->hostname :
255 newsocket->ip ? newsocket->ip : ""));
256 server->stat.conn_failures++;
259 if (!newsocket->hostname)
260 newsocket->hostname = strdup(newsocket->ip);
262 newsocket->port = silc_net_get_local_port(sock[i]);
264 /* Put the allocated socket pointer also to the entry allocated above
265 for fast back-referencing to the socket list. */
266 id_entry->connection = (void *)server->sockets[sock[i]];
267 server->id_entry = id_entry;
270 /* Register protocols */
271 silc_server_protocols_register();
273 /* Initialize the scheduler. This will register the task queues as well.
274 In SILC we have by default three task queues. One task queue for
275 non-timeout tasks which perform different kind of I/O on file
276 descriptors, timeout task queue for timeout tasks, and, generic
277 non-timeout task queue whose tasks apply to all connections. */
278 server->schedule = silc_schedule_init(&server->io_queue,
279 &server->timeout_queue,
280 &server->generic_queue,
281 SILC_SERVER_MAX_CONNECTIONS);
282 if (!server->schedule)
285 /* Add the first task to the queue. This is task that is executed by
286 timeout. It expires as soon as the caller calls silc_server_run. This
287 task performs authentication protocol and key exchange with our
289 silc_task_register(server->timeout_queue, sock[0],
290 silc_server_connect_to_router,
291 (void *)server, 0, 1,
293 SILC_TASK_PRI_NORMAL);
295 /* Add listener task to the queue. This task receives new connections to the
296 server. This task remains on the queue until the end of the program. */
297 silc_task_register(server->io_queue, sock[0],
298 silc_server_accept_new_connection,
299 (void *)server, 0, 0,
301 SILC_TASK_PRI_NORMAL);
302 server->listenning = TRUE;
304 /* If server connections has been configured then we must be router as
305 normal server cannot have server connections, only router connections. */
306 if (server->config->servers)
307 server->server_type = SILC_ROUTER;
309 /* Register the ID Cache purge task. This periodically purges the ID cache
310 and removes the expired cache entries. */
312 /* Clients local list */
313 purge = silc_calloc(1, sizeof(*purge));
314 purge->cache = server->local_list->clients;
315 purge->timeout_queue = server->timeout_queue;
316 silc_task_register(purge->timeout_queue, 0,
318 (void *)purge, 600, 0,
319 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
321 /* Clients global list */
322 purge = silc_calloc(1, sizeof(*purge));
323 purge->cache = server->global_list->clients;
324 purge->timeout_queue = server->timeout_queue;
325 silc_task_register(purge->timeout_queue, 0,
327 (void *)purge, 300, 0,
328 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
330 SILC_LOG_DEBUG(("Server initialized"));
332 /* We are done here, return succesfully */
336 for (i = 0; i < sock_count; i++)
337 silc_net_close_server(sock[i]);
342 /* Fork server to background and set gid+uid to non-root.
343 Silcd will not run as root, so trying to set either user or group to
344 root will cause silcd to exit. */
346 void silc_server_daemonise(SilcServer server)
348 /* Are we executing silcd as root or a regular user? */
355 if (!server->config->identity || !server->config->identity->user ||
356 !server->config->identity->group) {
357 fprintf(stderr, "Error:"
358 "\tSILC server must not be run as root. For the security of your\n"
359 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
360 "\tuser account. Modify the [Identity] configuration section to run\n"
361 "\tthe server as non-root user.\n");
365 /* Get the values given for user and group in configuration file */
366 user=server->config->identity->user;
367 group=server->config->identity->group;
369 /* Check whether the user/group information is text */
370 if (atoi(user)!=0 || atoi(group)!=0) {
371 SILC_LOG_DEBUG(("Invalid user and/or group information"));
372 SILC_LOG_DEBUG(("User and/or group given as number"));
373 fprintf(stderr, "Invalid user and/or group information\n");
374 fprintf(stderr, "Please assign them as names, not numbers\n");
378 /* Catch the nasty incident of string "0" returning 0 from atoi */
379 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
380 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
381 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
389 fprintf(stderr, "No such user %s found\n", user);
394 fprintf(stderr, "No such group %s found\n", group);
398 /* Check whether user and/or group is set to root. If yes, exit
399 immediately. Otherwise, setgid and setuid server to user.group */
400 if (gr->gr_gid==0 || pw->pw_uid==0) {
401 fprintf(stderr, "Error:"
402 "\tSILC server must not be run as root. For the security of your\n"
403 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
404 "\tuser account. Modify the [Identity] configuration section to run\n"
405 "\tthe server as non-root user.\n");
408 /* Fork server to background, making it a daemon */
410 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
411 SILC_LOG_DEBUG(("Forking SILC server to background"));
416 SILC_LOG_DEBUG(("Changing to group %s", group));
417 if(setgid(gr->gr_gid)==0) {
418 SILC_LOG_DEBUG(("Setgid to %s", group));
420 SILC_LOG_DEBUG(("Setgid to %s failed", group));
421 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
425 SILC_LOG_DEBUG(("Changing to user nobody"));
426 if(setuid(pw->pw_uid)==0) {
427 SILC_LOG_DEBUG(("Setuid to %s", user));
429 SILC_LOG_DEBUG(("Setuid to %s failed", user));
430 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
436 /* Fork server to background, making it a daemon */
438 SILC_LOG_DEBUG(("Server started as user"));
439 SILC_LOG_DEBUG(("Forking SILC server to background"));
446 /* Stops the SILC server. This function is used to shutdown the server.
447 This is usually called after the scheduler has returned. After stopping
448 the server one should call silc_server_free. */
450 void silc_server_stop(SilcServer server)
452 SILC_LOG_DEBUG(("Stopping server"));
454 /* Stop the scheduler, although it might be already stopped. This
455 doesn't hurt anyone. This removes all the tasks and task queues,
457 silc_schedule_stop(server->schedule);
458 silc_schedule_uninit(server->schedule);
460 silc_server_protocols_unregister();
462 SILC_LOG_DEBUG(("Server stopped"));
465 /* The heart of the server. This runs the scheduler thus runs the server.
466 When this returns the server has been stopped and the program will
469 void silc_server_run(SilcServer server)
471 SILC_LOG_DEBUG(("Running server"));
473 SILC_LOG_INFO(("SILC Server started"));
475 /* Start the scheduler, the heart of the SILC server. When this returns
476 the program will be terminated. */
477 silc_schedule(server->schedule);
480 /* Timeout callback that will be called to retry connecting to remote
481 router. This is used by both normal and router server. This will wait
482 before retrying the connecting. The timeout is generated by exponential
483 backoff algorithm. */
485 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
487 SilcServerConnection sconn = (SilcServerConnection)context;
488 SilcServer server = sconn->server;
490 SILC_LOG_INFO(("Retrying connecting to a router"));
492 /* Calculate next timeout */
493 if (sconn->retry_count >= 1) {
494 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
495 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
496 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
498 sconn->retry_timeout = server->params->retry_interval_min;
500 sconn->retry_count++;
501 sconn->retry_timeout = sconn->retry_timeout +
502 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
504 /* If we've reached max retry count, give up. */
505 if (sconn->retry_count > server->params->retry_count &&
506 server->params->retry_keep_trying == FALSE) {
507 SILC_LOG_ERROR(("Could not connect to router, giving up"));
511 /* Wait one before retrying */
512 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
513 context, sconn->retry_timeout,
514 server->params->retry_interval_min_usec,
515 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
518 /* Generic routine to use connect to a router. */
520 SILC_TASK_CALLBACK(silc_server_connect_router)
522 SilcServerConnection sconn = (SilcServerConnection)context;
523 SilcServer server = sconn->server;
524 SilcSocketConnection newsocket;
525 SilcProtocol protocol;
526 SilcServerKEInternalContext *proto_ctx;
529 SILC_LOG_INFO(("Connecting to the router %s on port %d",
530 sconn->remote_host, sconn->remote_port));
532 /* Connect to remote host */
533 sock = silc_net_create_connection(sconn->remote_port,
536 SILC_LOG_ERROR(("Could not connect to router"));
537 silc_task_register(server->timeout_queue, fd,
538 silc_server_connect_to_router_retry,
539 context, 0, 1, SILC_TASK_TIMEOUT,
540 SILC_TASK_PRI_NORMAL);
544 /* Set socket options */
545 silc_net_set_socket_nonblock(sock);
546 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
548 /* Create socket connection for the connection. Even though we
549 know that we are connecting to a router we will mark the socket
550 to be unknown connection until we have executed authentication
552 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
553 server->sockets[sock] = newsocket;
554 newsocket->hostname = strdup(sconn->remote_host);
555 newsocket->ip = strdup(sconn->remote_host);
556 newsocket->port = sconn->remote_port;
557 sconn->sock = newsocket;
559 /* Allocate internal protocol context. This is sent as context
561 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
562 proto_ctx->server = (void *)server;
563 proto_ctx->context = (void *)sconn;
564 proto_ctx->sock = newsocket;
565 proto_ctx->rng = server->rng;
566 proto_ctx->responder = FALSE;
568 /* Perform key exchange protocol. silc_server_connect_to_router_second
569 will be called after the protocol is finished. */
570 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
571 &protocol, proto_ctx,
572 silc_server_connect_to_router_second);
573 newsocket->protocol = protocol;
575 /* Register a timeout task that will be executed if the protocol
576 is not executed within set limit. */
577 proto_ctx->timeout_task =
578 silc_task_register(server->timeout_queue, sock,
579 silc_server_timeout_remote,
580 server, server->params->protocol_timeout,
581 server->params->protocol_timeout_usec,
585 /* Register the connection for network input and output. This sets
586 that scheduler will listen for incoming packets for this connection
587 and sets that outgoing packets may be sent to this connection as
588 well. However, this doesn't set the scheduler for outgoing traffic,
589 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
590 later when outgoing data is available. */
591 context = (void *)server;
592 SILC_REGISTER_CONNECTION_FOR_IO(sock);
594 /* Run the protocol */
595 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
598 /* This function connects to our primary router or if we are a router this
599 establishes all our primary routes. This is called at the start of the
600 server to do authentication and key exchange with our router - called
603 SILC_TASK_CALLBACK(silc_server_connect_to_router)
605 SilcServer server = (SilcServer)context;
606 SilcServerConnection sconn;
608 SILC_LOG_DEBUG(("Connecting to router(s)"));
610 /* If we are normal SILC server we need to connect to our cell's
612 if (server->server_type == SILC_SERVER) {
613 SILC_LOG_DEBUG(("We are normal server"));
615 /* Create connection to the router, if configured. */
616 if (server->config->routers) {
618 /* Allocate connection object for hold connection specific stuff. */
619 sconn = silc_calloc(1, sizeof(*sconn));
620 sconn->server = server;
621 sconn->remote_host = strdup(server->config->routers->host);
622 sconn->remote_port = server->config->routers->port;
624 silc_task_register(server->timeout_queue, fd,
625 silc_server_connect_router,
626 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
627 SILC_TASK_PRI_NORMAL);
632 /* If we are a SILC router we need to establish all of our primary
634 if (server->server_type == SILC_ROUTER) {
635 SilcServerConfigSectionServerConnection *ptr;
637 SILC_LOG_DEBUG(("We are router"));
639 /* Create the connections to all our routes */
640 ptr = server->config->routers;
643 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
644 ptr->initiator ? "Initiator" : "Responder",
645 ptr->host, ptr->port));
647 if (ptr->initiator) {
648 /* Allocate connection object for hold connection specific stuff. */
649 sconn = silc_calloc(1, sizeof(*sconn));
650 sconn->server = server;
651 sconn->remote_host = strdup(ptr->host);
652 sconn->remote_port = ptr->port;
654 silc_task_register(server->timeout_queue, fd,
655 silc_server_connect_router,
656 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
657 SILC_TASK_PRI_NORMAL);
667 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
669 /* There wasn't a configured router, we will continue but we don't
670 have a connection to outside world. We will be standalone server. */
671 server->standalone = TRUE;
674 /* Second part of connecting to router(s). Key exchange protocol has been
675 executed and now we will execute authentication protocol. */
677 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
679 SilcProtocol protocol = (SilcProtocol)context;
680 SilcServerKEInternalContext *ctx =
681 (SilcServerKEInternalContext *)protocol->context;
682 SilcServer server = (SilcServer)ctx->server;
683 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
684 SilcSocketConnection sock = ctx->sock;
685 SilcServerConnAuthInternalContext *proto_ctx;
686 SilcServerConfigSectionServerConnection *conn = NULL;
688 SILC_LOG_DEBUG(("Start"));
690 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
691 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
692 /* Error occured during protocol */
693 silc_protocol_free(protocol);
694 sock->protocol = NULL;
695 silc_ske_free_key_material(ctx->keymat);
697 silc_packet_context_free(ctx->packet);
699 silc_ske_free(ctx->ske);
701 silc_free(ctx->dest_id);
703 silc_task_unregister_by_callback(server->timeout_queue,
704 silc_server_failure_callback);
705 silc_server_disconnect_remote(server, sock, "Server closed connection: "
706 "Key exchange failed");
710 /* We now have the key material as the result of the key exchange
711 protocol. Take the key material into use. Free the raw key material
712 as soon as we've set them into use. */
713 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
714 ctx->ske->prop->cipher,
715 ctx->ske->prop->pkcs,
716 ctx->ske->prop->hash,
717 ctx->ske->prop->hmac,
718 ctx->ske->prop->group,
720 silc_protocol_free(protocol);
721 sock->protocol = NULL;
722 silc_ske_free_key_material(ctx->keymat);
724 silc_packet_context_free(ctx->packet);
726 silc_ske_free(ctx->ske);
728 silc_free(ctx->dest_id);
730 silc_task_unregister_by_callback(server->timeout_queue,
731 silc_server_failure_callback);
732 silc_server_disconnect_remote(server, sock, "Server closed connection: "
733 "Key exchange failed");
736 silc_ske_free_key_material(ctx->keymat);
738 /* Allocate internal context for the authentication protocol. This
739 is sent as context for the protocol. */
740 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
741 proto_ctx->server = (void *)server;
742 proto_ctx->context = (void *)sconn;
743 proto_ctx->sock = sock;
744 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
745 proto_ctx->dest_id_type = ctx->dest_id_type;
746 proto_ctx->dest_id = ctx->dest_id;
748 /* Resolve the authentication method used in this connection. Check if
749 we find a match from user configured connections */
750 conn = silc_server_config_find_router_conn(server->config,
754 /* Match found. Use the configured authentication method */
755 proto_ctx->auth_meth = conn->auth_meth;
756 if (conn->auth_data) {
757 proto_ctx->auth_data = strdup(conn->auth_data);
758 proto_ctx->auth_data_len = strlen(conn->auth_data);
761 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
762 sock->hostname, sock->ip, sock->port));
763 silc_protocol_free(protocol);
764 sock->protocol = NULL;
766 silc_packet_context_free(ctx->packet);
768 silc_ske_free(ctx->ske);
770 silc_free(ctx->dest_id);
772 silc_task_unregister_by_callback(server->timeout_queue,
773 silc_server_failure_callback);
774 silc_server_disconnect_remote(server, sock, "Server closed connection: "
775 "Key exchange failed");
779 /* Free old protocol as it is finished now */
780 silc_protocol_free(protocol);
782 silc_packet_context_free(ctx->packet);
784 sock->protocol = NULL;
786 /* Allocate the authentication protocol. This is allocated here
787 but we won't start it yet. We will be receiving party of this
788 protocol thus we will wait that connecting party will make
790 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
791 &sock->protocol, proto_ctx,
792 silc_server_connect_to_router_final);
794 /* Register timeout task. If the protocol is not executed inside
795 this timelimit the connection will be terminated. Currently
796 this is 15 seconds and is hard coded limit (XXX). */
797 proto_ctx->timeout_task =
798 silc_task_register(server->timeout_queue, sock->sock,
799 silc_server_timeout_remote,
800 (void *)server, 15, 0,
804 /* Run the protocol */
805 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
808 /* Finalizes the connection to router. Registers a server task to the
809 queue so that we can accept new connections. */
811 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
813 SilcProtocol protocol = (SilcProtocol)context;
814 SilcServerConnAuthInternalContext *ctx =
815 (SilcServerConnAuthInternalContext *)protocol->context;
816 SilcServer server = (SilcServer)ctx->server;
817 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
818 SilcSocketConnection sock = ctx->sock;
819 SilcServerEntry id_entry;
821 SilcServerHBContext hb_context;
822 unsigned char *id_string;
824 SilcIDListData idata;
826 SILC_LOG_DEBUG(("Start"));
828 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
829 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
830 /* Error occured during protocol */
832 silc_free(ctx->dest_id);
833 silc_server_disconnect_remote(server, sock, "Server closed connection: "
834 "Authentication failed");
838 /* Add a task to the queue. This task receives new connections to the
839 server. This task remains on the queue until the end of the program. */
840 if (!server->listenning) {
841 silc_task_register(server->io_queue, server->sock,
842 silc_server_accept_new_connection,
843 (void *)server, 0, 0,
845 SILC_TASK_PRI_NORMAL);
846 server->listenning = TRUE;
849 /* Send NEW_SERVER packet to the router. We will become registered
850 to the SILC network after sending this packet. */
851 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
852 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
853 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
854 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
855 silc_buffer_format(packet,
856 SILC_STR_UI_SHORT(id_len),
857 SILC_STR_UI_XNSTRING(id_string, id_len),
858 SILC_STR_UI_SHORT(strlen(server->server_name)),
859 SILC_STR_UI_XNSTRING(server->server_name,
860 strlen(server->server_name)),
863 /* Send the packet */
864 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
865 packet->data, packet->len, TRUE);
866 silc_buffer_free(packet);
867 silc_free(id_string);
869 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
871 /* Add the connected router to local server list */
872 server->standalone = FALSE;
873 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
874 SILC_ROUTER, ctx->dest_id, NULL, sock);
877 silc_free(ctx->dest_id);
878 silc_server_disconnect_remote(server, sock, "Server closed connection: "
879 "Authentication failed");
883 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
884 silc_free(sock->user_data);
885 sock->user_data = (void *)id_entry;
886 sock->type = SILC_SOCKET_TYPE_ROUTER;
887 server->id_entry->router = id_entry;
888 server->router = id_entry;
889 idata = (SilcIDListData)sock->user_data;
890 idata->registered = TRUE;
892 /* Perform keepalive. The `hb_context' will be freed automatically
893 when finally calling the silc_socket_free function. XXX hardcoded
895 hb_context = silc_calloc(1, sizeof(*hb_context));
896 hb_context->server = server;
897 silc_socket_set_heartbeat(sock, 600, hb_context,
898 silc_server_perform_heartbeat,
899 server->timeout_queue);
901 /* Register re-key timeout */
902 idata->rekey->timeout = 3600; /* XXX hardcoded */
903 idata->rekey->context = (void *)server;
904 silc_task_register(server->timeout_queue, sock->sock,
905 silc_server_rekey_callback,
906 (void *)sock, idata->rekey->timeout, 0,
907 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
909 /* If we are router then announce our possible servers. */
910 if (server->server_type == SILC_ROUTER)
911 silc_server_announce_servers(server);
913 /* Announce our clients and channels to the router */
914 silc_server_announce_clients(server);
915 silc_server_announce_channels(server);
918 /* Free the temporary connection data context */
920 silc_free(sconn->remote_host);
924 /* Free the protocol object */
925 silc_protocol_free(protocol);
927 silc_packet_context_free(ctx->packet);
929 silc_ske_free(ctx->ske);
931 sock->protocol = NULL;
934 /* Accepts new connections to the server. Accepting new connections are
935 done in three parts to make it async. */
937 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
939 SilcServer server = (SilcServer)context;
940 SilcSocketConnection newsocket;
941 SilcServerKEInternalContext *proto_ctx;
943 void *cconfig, *sconfig, *rconfig;
944 SilcServerConfigSectionDenyConnection *deny;
946 SILC_LOG_DEBUG(("Accepting new connection"));
948 server->stat.conn_attempts++;
950 sock = silc_net_accept_connection(server->sock);
952 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
953 server->stat.conn_failures++;
957 /* Check max connections */
958 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
959 SILC_LOG_ERROR(("Refusing connection, server is full"));
960 server->stat.conn_failures++;
964 /* Set socket options */
965 silc_net_set_socket_nonblock(sock);
966 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
968 /* We don't create a ID yet, since we don't know what type of connection
969 this is yet. But, we do add the connection to the socket table. */
970 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
971 server->sockets[sock] = newsocket;
973 /* XXX This MUST be done async as this will block the entire server
974 process. Either we have to do our own resolver stuff or in the future
975 we can use threads. */
976 /* Perform name and address lookups for the remote host. */
977 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
979 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
981 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
982 newsocket->hostname ? newsocket->hostname :
983 newsocket->ip ? newsocket->ip : ""));
984 server->stat.conn_failures++;
987 if (!newsocket->hostname)
988 newsocket->hostname = strdup(newsocket->ip);
990 newsocket->port = silc_net_get_remote_port(sock);
992 /* Register the connection for network input and output. This sets
993 that scheduler will listen for incoming packets for this connection
994 and sets that outgoing packets may be sent to this connection as well.
995 However, this doesn't set the scheduler for outgoing traffic, it
996 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
997 later when outgoing data is available. */
998 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1000 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1003 port = server->sockets[fd]->port; /* Listenning port */
1005 /* Check whether this connection is denied to connect to us. */
1006 deny = silc_server_config_denied_conn(server->config, newsocket->ip, port);
1008 deny = silc_server_config_denied_conn(server->config, newsocket->hostname,
1011 /* The connection is denied */
1012 SILC_LOG_INFO(("Connection %s (%s) is denied",
1013 newsocket->hostname, newsocket->ip));
1014 silc_server_disconnect_remote(server, newsocket, deny->comment ?
1016 "Server closed connection: "
1017 "Connection refused");
1018 server->stat.conn_failures++;
1022 /* Check whether we have configred this sort of connection at all. We
1023 have to check all configurations since we don't know what type of
1024 connection this is. */
1025 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1026 newsocket->ip, port)))
1027 cconfig = silc_server_config_find_client_conn(server->config,
1028 newsocket->hostname,
1030 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1033 sconfig = silc_server_config_find_server_conn(server->config,
1034 newsocket->hostname,
1036 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1037 newsocket->ip, port)))
1038 rconfig = silc_server_config_find_router_conn(server->config,
1039 newsocket->hostname,
1041 if (!cconfig && !sconfig && !rconfig) {
1042 silc_server_disconnect_remote(server, newsocket,
1043 "Server closed connection: "
1044 "Connection refused");
1045 server->stat.conn_failures++;
1049 /* The connection is allowed */
1051 /* Allocate internal context for key exchange protocol. This is
1052 sent as context for the protocol. */
1053 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1054 proto_ctx->server = context;
1055 proto_ctx->sock = newsocket;
1056 proto_ctx->rng = server->rng;
1057 proto_ctx->responder = TRUE;
1058 proto_ctx->cconfig = cconfig;
1059 proto_ctx->sconfig = sconfig;
1060 proto_ctx->rconfig = rconfig;
1062 /* Prepare the connection for key exchange protocol. We allocate the
1063 protocol but will not start it yet. The connector will be the
1064 initiator of the protocol thus we will wait for initiation from
1065 there before we start the protocol. */
1066 server->stat.auth_attempts++;
1067 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1068 &newsocket->protocol, proto_ctx,
1069 silc_server_accept_new_connection_second);
1071 /* Register a timeout task that will be executed if the connector
1072 will not start the key exchange protocol within 60 seconds. For
1073 now, this is a hard coded limit. After 60 secs the connection will
1074 be closed if the key exchange protocol has not been started. */
1075 proto_ctx->timeout_task =
1076 silc_task_register(server->timeout_queue, newsocket->sock,
1077 silc_server_timeout_remote,
1083 /* Second part of accepting new connection. Key exchange protocol has been
1084 performed and now it is time to do little connection authentication
1085 protocol to figure out whether this connection is client or server
1086 and whether it has right to access this server (especially server
1087 connections needs to be authenticated). */
1089 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1091 SilcProtocol protocol = (SilcProtocol)context;
1092 SilcServerKEInternalContext *ctx =
1093 (SilcServerKEInternalContext *)protocol->context;
1094 SilcServer server = (SilcServer)ctx->server;
1095 SilcSocketConnection sock = ctx->sock;
1096 SilcServerConnAuthInternalContext *proto_ctx;
1098 SILC_LOG_DEBUG(("Start"));
1100 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1101 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1102 /* Error occured during protocol */
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1105 silc_ske_free_key_material(ctx->keymat);
1107 silc_packet_context_free(ctx->packet);
1109 silc_ske_free(ctx->ske);
1111 silc_free(ctx->dest_id);
1113 silc_task_unregister_by_callback(server->timeout_queue,
1114 silc_server_failure_callback);
1115 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1116 "Key exchange failed");
1117 server->stat.auth_failures++;
1121 /* We now have the key material as the result of the key exchange
1122 protocol. Take the key material into use. Free the raw key material
1123 as soon as we've set them into use. */
1124 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1125 ctx->ske->prop->cipher,
1126 ctx->ske->prop->pkcs,
1127 ctx->ske->prop->hash,
1128 ctx->ske->prop->hmac,
1129 ctx->ske->prop->group,
1131 silc_protocol_free(protocol);
1132 sock->protocol = NULL;
1133 silc_ske_free_key_material(ctx->keymat);
1135 silc_packet_context_free(ctx->packet);
1137 silc_ske_free(ctx->ske);
1139 silc_free(ctx->dest_id);
1141 silc_task_unregister_by_callback(server->timeout_queue,
1142 silc_server_failure_callback);
1143 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1144 "Key exchange failed");
1145 server->stat.auth_failures++;
1148 silc_ske_free_key_material(ctx->keymat);
1150 /* Allocate internal context for the authentication protocol. This
1151 is sent as context for the protocol. */
1152 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1153 proto_ctx->server = (void *)server;
1154 proto_ctx->sock = sock;
1155 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1156 proto_ctx->responder = TRUE;
1157 proto_ctx->dest_id_type = ctx->dest_id_type;
1158 proto_ctx->dest_id = ctx->dest_id;
1159 proto_ctx->cconfig = ctx->cconfig;
1160 proto_ctx->sconfig = ctx->sconfig;
1161 proto_ctx->rconfig = ctx->rconfig;
1163 /* Free old protocol as it is finished now */
1164 silc_protocol_free(protocol);
1166 silc_packet_context_free(ctx->packet);
1168 sock->protocol = NULL;
1170 /* Allocate the authentication protocol. This is allocated here
1171 but we won't start it yet. We will be receiving party of this
1172 protocol thus we will wait that connecting party will make
1173 their first move. */
1174 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1175 &sock->protocol, proto_ctx,
1176 silc_server_accept_new_connection_final);
1178 /* Register timeout task. If the protocol is not executed inside
1179 this timelimit the connection will be terminated. Currently
1180 this is 60 seconds and is hard coded limit (XXX). */
1181 proto_ctx->timeout_task =
1182 silc_task_register(server->timeout_queue, sock->sock,
1183 silc_server_timeout_remote,
1184 (void *)server, 60, 0,
1189 /* Final part of accepting new connection. The connection has now
1190 been authenticated and keys has been exchanged. We also know whether
1191 this is client or server connection. */
1193 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1195 SilcProtocol protocol = (SilcProtocol)context;
1196 SilcServerConnAuthInternalContext *ctx =
1197 (SilcServerConnAuthInternalContext *)protocol->context;
1198 SilcServer server = (SilcServer)ctx->server;
1199 SilcSocketConnection sock = ctx->sock;
1200 SilcServerHBContext hb_context;
1201 void *id_entry = NULL;
1203 SILC_LOG_DEBUG(("Start"));
1205 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1206 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1207 /* Error occured during protocol */
1208 silc_protocol_free(protocol);
1209 sock->protocol = NULL;
1211 silc_packet_context_free(ctx->packet);
1213 silc_ske_free(ctx->ske);
1215 silc_free(ctx->dest_id);
1218 sock->protocol = NULL;
1219 silc_task_unregister_by_callback(server->timeout_queue,
1220 silc_server_failure_callback);
1221 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1222 "Authentication failed");
1223 server->stat.auth_failures++;
1227 switch(ctx->conn_type) {
1228 case SILC_SOCKET_TYPE_CLIENT:
1230 SilcClientEntry client;
1232 SILC_LOG_DEBUG(("Remote host is client"));
1233 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1236 /* Add the client to the client ID cache. The nickname and Client ID
1237 and other information is created after we have received NEW_CLIENT
1238 packet from client. */
1239 client = silc_idlist_add_client(server->local_list,
1240 NULL, NULL, NULL, NULL, NULL, sock);
1242 SILC_LOG_ERROR(("Could not add new client to cache"));
1243 silc_free(sock->user_data);
1244 silc_server_disconnect_remote(server, sock,
1245 "Server closed connection: "
1246 "Authentication failed");
1247 server->stat.auth_failures++;
1252 server->stat.my_clients++;
1253 server->stat.clients++;
1254 if (server->server_type == SILC_ROUTER)
1255 server->stat.cell_clients++;
1257 id_entry = (void *)client;
1260 case SILC_SOCKET_TYPE_SERVER:
1261 case SILC_SOCKET_TYPE_ROUTER:
1263 SilcServerEntry new_server;
1264 SilcServerConfigSectionServerConnection *conn =
1265 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1266 ctx->sconfig : ctx->rconfig;
1268 SILC_LOG_DEBUG(("Remote host is %s",
1269 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1270 "server" : "router"));
1271 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1272 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1273 "server" : "router"));
1275 /* Add the server into server cache. The server name and Server ID
1276 is updated after we have received NEW_SERVER packet from the
1277 server. We mark ourselves as router for this server if we really
1280 silc_idlist_add_server(server->local_list, NULL,
1281 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1282 SILC_SERVER : SILC_ROUTER, NULL,
1283 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1284 server->id_entry : NULL, sock);
1286 SILC_LOG_ERROR(("Could not add new server to cache"));
1287 silc_free(sock->user_data);
1288 silc_server_disconnect_remote(server, sock,
1289 "Server closed connection: "
1290 "Authentication failed");
1291 server->stat.auth_failures++;
1296 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1297 server->stat.my_servers++;
1299 server->stat.my_routers++;
1300 server->stat.servers++;
1302 id_entry = (void *)new_server;
1304 /* Check whether this connection is to be our primary router connection
1305 if we dont' already have the primary route. */
1306 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1307 if (silc_server_config_is_primary_route(server->config) &&
1311 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1312 server->standalone = FALSE;
1313 if (!server->id_entry->router) {
1314 server->id_entry->router = id_entry;
1315 server->router = id_entry;
1325 sock->type = ctx->conn_type;
1327 /* Add the common data structure to the ID entry. */
1329 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1331 /* Add to sockets internal pointer for fast referencing */
1332 silc_free(sock->user_data);
1333 sock->user_data = id_entry;
1335 /* Connection has been fully established now. Everything is ok. */
1336 SILC_LOG_DEBUG(("New connection authenticated"));
1338 /* Perform keepalive. The `hb_context' will be freed automatically
1339 when finally calling the silc_socket_free function. XXX hardcoded
1341 hb_context = silc_calloc(1, sizeof(*hb_context));
1342 hb_context->server = server;
1343 silc_socket_set_heartbeat(sock, 600, hb_context,
1344 silc_server_perform_heartbeat,
1345 server->timeout_queue);
1348 silc_task_unregister_by_callback(server->timeout_queue,
1349 silc_server_failure_callback);
1350 silc_protocol_free(protocol);
1352 silc_packet_context_free(ctx->packet);
1354 silc_ske_free(ctx->ske);
1356 silc_free(ctx->dest_id);
1358 sock->protocol = NULL;
1361 /* This function is used to read packets from network and send packets to
1362 network. This is usually a generic task. */
1364 SILC_TASK_CALLBACK(silc_server_packet_process)
1366 SilcServer server = (SilcServer)context;
1367 SilcSocketConnection sock = server->sockets[fd];
1368 SilcIDListData idata;
1369 SilcCipher cipher = NULL;
1370 SilcHmac hmac = NULL;
1376 SILC_LOG_DEBUG(("Processing packet"));
1378 /* Packet sending */
1380 if (type == SILC_TASK_WRITE) {
1381 /* Do not send data to disconnected connection */
1382 if (SILC_IS_DISCONNECTED(sock))
1385 server->stat.packets_sent++;
1387 if (sock->outbuf->data - sock->outbuf->head)
1388 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1390 /* Send the packet */
1391 ret = silc_packet_send(sock, TRUE);
1393 /* If returned -2 could not write to connection now, will do
1399 SILC_LOG_ERROR(("Error sending packet to connection "
1400 "%s:%d [%s]", sock->hostname, sock->port,
1401 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1402 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1403 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1408 /* The packet has been sent and now it is time to set the connection
1409 back to only for input. When there is again some outgoing data
1410 available for this connection it will be set for output as well.
1411 This call clears the output setting and sets it only for input. */
1412 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1413 SILC_UNSET_OUTBUF_PENDING(sock);
1415 silc_buffer_clear(sock->outbuf);
1419 /* Packet receiving */
1421 /* Read some data from connection */
1422 ret = silc_packet_receive(sock);
1424 SILC_LOG_ERROR(("Error receiving packet from connection "
1425 "%s:%d [%s]", sock->hostname, sock->port,
1426 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1427 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1428 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1435 SILC_LOG_DEBUG(("Read EOF"));
1437 /* If connection is disconnecting already we will finally
1438 close the connection */
1439 if (SILC_IS_DISCONNECTING(sock)) {
1440 if (sock->user_data)
1441 silc_server_free_sock_user_data(server, sock);
1442 silc_server_close_connection(server, sock);
1446 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1447 SILC_SET_DISCONNECTING(sock);
1449 /* If the closed connection was our primary router connection the
1450 start re-connecting phase. */
1451 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1452 sock == server->router->connection)
1453 silc_task_register(server->timeout_queue, 0,
1454 silc_server_connect_to_router,
1457 SILC_TASK_PRI_NORMAL);
1459 if (sock->user_data)
1460 silc_server_free_sock_user_data(server, sock);
1461 silc_server_close_connection(server, sock);
1465 /* If connection is disconnecting or disconnected we will ignore
1467 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1468 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1472 server->stat.packets_received++;
1474 /* Get keys and stuff from ID entry */
1475 idata = (SilcIDListData)sock->user_data;
1477 idata->last_receive = time(NULL);
1478 cipher = idata->receive_key;
1479 hmac = idata->hmac_receive;
1482 /* Process the packet. This will call the parser that will then
1483 decrypt and parse the packet. */
1484 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1488 /* Callback function that the silc_packet_decrypt will call to make the
1489 decision whether the packet is normal or special packet. We will
1490 return TRUE if it is normal and FALSE if it is special */
1492 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1494 SilcPacketContext *packet,
1497 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1498 SilcServer server = (SilcServer)parse_ctx->context;
1500 /* Packet is normal packet, if:
1502 1) packet is private message packet and does not have private key set
1503 2) is other packet than channel message packet
1504 3) is channel message packet and remote is router and we are router
1506 all other packets are special packets
1509 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1510 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1513 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1514 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1515 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1516 server->server_type == SILC_ROUTER))
1522 /* Parses whole packet, received earlier. */
1524 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1526 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1527 SilcServer server = (SilcServer)parse_ctx->context;
1528 SilcSocketConnection sock = parse_ctx->sock;
1529 SilcPacketContext *packet = parse_ctx->packet;
1530 SilcIDListData idata = (SilcIDListData)sock->user_data;
1533 SILC_LOG_DEBUG(("Start"));
1535 /* Decrypt the received packet */
1536 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1537 idata ? idata->hmac_receive : NULL,
1538 packet->buffer, packet,
1539 silc_server_packet_decrypt_check, parse_ctx);
1541 SILC_LOG_WARNING(("Packet decryption failed for connection "
1542 "%s:%d [%s]", sock->hostname, sock->port,
1543 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1544 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1545 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1551 /* Parse the packet. Packet type is returned. */
1552 ret = silc_packet_parse(packet);
1554 /* Parse the packet header in special way as this is "special"
1556 ret = silc_packet_parse_special(packet);
1559 if (ret == SILC_PACKET_NONE)
1562 /* Check that the the current client ID is same as in the client's packet. */
1563 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1564 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1565 if (client && client->id) {
1566 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1567 packet->src_id_type);
1568 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1576 if (server->server_type == SILC_ROUTER) {
1577 /* Route the packet if it is not destined to us. Other ID types but
1578 server are handled separately after processing them. */
1579 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1580 packet->dst_id_type == SILC_ID_SERVER &&
1581 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1582 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1584 /* Route the packet to fastest route for the destination ID */
1585 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1586 packet->dst_id_type);
1589 silc_server_packet_route(server,
1590 silc_server_route_get(server, id,
1591 packet->dst_id_type),
1598 /* Parse the incoming packet type */
1599 silc_server_packet_parse_type(server, sock, packet);
1601 if (server->server_type == SILC_ROUTER) {
1602 /* Broadcast packet if it is marked as broadcast packet and it is
1603 originated from router and we are router. */
1604 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1605 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1606 !server->standalone) {
1607 silc_server_packet_broadcast(server, server->router->connection, packet);
1612 /* silc_buffer_clear(sock->inbuf); */
1613 silc_packet_context_free(packet);
1614 silc_free(parse_ctx);
1617 /* Parser callback called by silc_packet_receive_process. This merely
1618 registers timeout that will handle the actual parsing when appropriate. */
1620 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1622 SilcServer server = (SilcServer)parser_context->context;
1623 SilcSocketConnection sock = parser_context->sock;
1625 switch (sock->type) {
1626 case SILC_SOCKET_TYPE_UNKNOWN:
1627 case SILC_SOCKET_TYPE_CLIENT:
1628 /* Parse the packet with timeout */
1629 silc_task_register(server->timeout_queue, sock->sock,
1630 silc_server_packet_parse_real,
1631 (void *)parser_context, 0, 100000,
1633 SILC_TASK_PRI_NORMAL);
1635 case SILC_SOCKET_TYPE_SERVER:
1636 case SILC_SOCKET_TYPE_ROUTER:
1637 /* Packets from servers are parsed as soon as possible */
1638 silc_task_register(server->timeout_queue, sock->sock,
1639 silc_server_packet_parse_real,
1640 (void *)parser_context, 0, 1,
1642 SILC_TASK_PRI_NORMAL);
1649 /* Parses the packet type and calls what ever routines the packet type
1650 requires. This is done for all incoming packets. */
1652 void silc_server_packet_parse_type(SilcServer server,
1653 SilcSocketConnection sock,
1654 SilcPacketContext *packet)
1656 SilcPacketType type = packet->type;
1658 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1660 /* Parse the packet type */
1662 case SILC_PACKET_DISCONNECT:
1663 SILC_LOG_DEBUG(("Disconnect packet"));
1664 if (packet->flags & SILC_PACKET_FLAG_LIST)
1668 case SILC_PACKET_SUCCESS:
1670 * Success received for something. For now we can have only
1671 * one protocol for connection executing at once hence this
1672 * success message is for whatever protocol is executing currently.
1674 SILC_LOG_DEBUG(("Success packet"));
1675 if (packet->flags & SILC_PACKET_FLAG_LIST)
1678 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1681 case SILC_PACKET_FAILURE:
1683 * Failure received for something. For now we can have only
1684 * one protocol for connection executing at once hence this
1685 * failure message is for whatever protocol is executing currently.
1687 SILC_LOG_DEBUG(("Failure packet"));
1688 if (packet->flags & SILC_PACKET_FLAG_LIST)
1690 if (sock->protocol) {
1691 SilcServerFailureContext f;
1692 f = silc_calloc(1, sizeof(*f));
1696 /* We will wait 5 seconds to process this failure packet */
1697 silc_task_register(server->timeout_queue, sock->sock,
1698 silc_server_failure_callback, (void *)f, 5, 0,
1699 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1703 case SILC_PACKET_REJECT:
1704 SILC_LOG_DEBUG(("Reject packet"));
1705 if (packet->flags & SILC_PACKET_FLAG_LIST)
1710 case SILC_PACKET_NOTIFY:
1712 * Received notify packet. Server can receive notify packets from
1713 * router. Server then relays the notify messages to clients if needed.
1715 SILC_LOG_DEBUG(("Notify packet"));
1716 if (packet->flags & SILC_PACKET_FLAG_LIST)
1717 silc_server_notify_list(server, sock, packet);
1719 silc_server_notify(server, sock, packet);
1725 case SILC_PACKET_CHANNEL_MESSAGE:
1727 * Received channel message. Channel messages are special packets
1728 * (although probably most common ones) thus they are handled
1731 SILC_LOG_DEBUG(("Channel Message packet"));
1732 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 silc_server_channel_message(server, sock, packet);
1737 case SILC_PACKET_CHANNEL_KEY:
1739 * Received key for channel. As channels are created by the router
1740 * the keys are as well. We will distribute the key to all of our
1741 * locally connected clients on the particular channel. Router
1742 * never receives this channel and thus is ignored.
1744 SILC_LOG_DEBUG(("Channel Key packet"));
1745 if (packet->flags & SILC_PACKET_FLAG_LIST)
1747 silc_server_channel_key(server, sock, packet);
1753 case SILC_PACKET_COMMAND:
1755 * Recived command. Processes the command request and allocates the
1756 * command context and calls the command.
1758 SILC_LOG_DEBUG(("Command packet"));
1759 if (packet->flags & SILC_PACKET_FLAG_LIST)
1761 silc_server_command_process(server, sock, packet);
1764 case SILC_PACKET_COMMAND_REPLY:
1766 * Received command reply packet. Received command reply to command. It
1767 * may be reply to command sent by us or reply to command sent by client
1768 * that we've routed further.
1770 SILC_LOG_DEBUG(("Command Reply packet"));
1771 if (packet->flags & SILC_PACKET_FLAG_LIST)
1773 silc_server_command_reply(server, sock, packet);
1777 * Private Message packets
1779 case SILC_PACKET_PRIVATE_MESSAGE:
1781 * Received private message packet. The packet is coming from either
1784 SILC_LOG_DEBUG(("Private Message packet"));
1785 if (packet->flags & SILC_PACKET_FLAG_LIST)
1787 silc_server_private_message(server, sock, packet);
1790 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1792 * Private message key packet.
1794 if (packet->flags & SILC_PACKET_FLAG_LIST)
1796 silc_server_private_message_key(server, sock, packet);
1800 * Key Exchange protocol packets
1802 case SILC_PACKET_KEY_EXCHANGE:
1803 SILC_LOG_DEBUG(("KE packet"));
1804 if (packet->flags & SILC_PACKET_FLAG_LIST)
1807 if (sock->protocol && sock->protocol->protocol &&
1808 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1810 SilcServerKEInternalContext *proto_ctx =
1811 (SilcServerKEInternalContext *)sock->protocol->context;
1813 proto_ctx->packet = silc_packet_context_dup(packet);
1815 /* Let the protocol handle the packet */
1816 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 100000);
1818 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1819 "protocol active, packet dropped."));
1823 case SILC_PACKET_KEY_EXCHANGE_1:
1824 SILC_LOG_DEBUG(("KE 1 packet"));
1825 if (packet->flags & SILC_PACKET_FLAG_LIST)
1828 if (sock->protocol && sock->protocol->protocol &&
1829 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1830 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1832 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1833 SilcServerRekeyInternalContext *proto_ctx =
1834 (SilcServerRekeyInternalContext *)sock->protocol->context;
1836 if (proto_ctx->packet)
1837 silc_packet_context_free(proto_ctx->packet);
1839 proto_ctx->packet = silc_packet_context_dup(packet);
1841 /* Let the protocol handle the packet */
1842 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1844 SilcServerKEInternalContext *proto_ctx =
1845 (SilcServerKEInternalContext *)sock->protocol->context;
1847 if (proto_ctx->packet)
1848 silc_packet_context_free(proto_ctx->packet);
1850 proto_ctx->packet = silc_packet_context_dup(packet);
1851 proto_ctx->dest_id_type = packet->src_id_type;
1852 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1853 packet->src_id_type);
1854 if (!proto_ctx->dest_id)
1857 /* Let the protocol handle the packet */
1858 silc_protocol_execute(sock->protocol, server->timeout_queue,
1862 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1863 "protocol active, packet dropped."));
1867 case SILC_PACKET_KEY_EXCHANGE_2:
1868 SILC_LOG_DEBUG(("KE 2 packet"));
1869 if (packet->flags & SILC_PACKET_FLAG_LIST)
1872 if (sock->protocol && sock->protocol->protocol &&
1873 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1874 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1876 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1877 SilcServerRekeyInternalContext *proto_ctx =
1878 (SilcServerRekeyInternalContext *)sock->protocol->context;
1880 if (proto_ctx->packet)
1881 silc_packet_context_free(proto_ctx->packet);
1883 proto_ctx->packet = silc_packet_context_dup(packet);
1885 /* Let the protocol handle the packet */
1886 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1888 SilcServerKEInternalContext *proto_ctx =
1889 (SilcServerKEInternalContext *)sock->protocol->context;
1891 if (proto_ctx->packet)
1892 silc_packet_context_free(proto_ctx->packet);
1894 proto_ctx->packet = silc_packet_context_dup(packet);
1895 proto_ctx->dest_id_type = packet->src_id_type;
1896 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1897 packet->src_id_type);
1898 if (!proto_ctx->dest_id)
1901 /* Let the protocol handle the packet */
1902 silc_protocol_execute(sock->protocol, server->timeout_queue,
1906 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1907 "protocol active, packet dropped."));
1911 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1913 * Connection authentication request packet. When we receive this packet
1914 * we will send to the other end information about our mandatory
1915 * authentication method for the connection. This packet maybe received
1918 SILC_LOG_DEBUG(("Connection authentication request packet"));
1919 if (packet->flags & SILC_PACKET_FLAG_LIST)
1921 silc_server_connection_auth_request(server, sock, packet);
1925 * Connection Authentication protocol packets
1927 case SILC_PACKET_CONNECTION_AUTH:
1928 /* Start of the authentication protocol. We receive here the
1929 authentication data and will verify it. */
1930 SILC_LOG_DEBUG(("Connection auth packet"));
1931 if (packet->flags & SILC_PACKET_FLAG_LIST)
1934 if (sock->protocol && sock->protocol->protocol->type
1935 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1937 SilcServerConnAuthInternalContext *proto_ctx =
1938 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1940 proto_ctx->packet = silc_packet_context_dup(packet);
1942 /* Let the protocol handle the packet */
1943 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1945 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1946 "protocol active, packet dropped."));
1950 case SILC_PACKET_NEW_ID:
1952 * Received New ID packet. This includes some new ID that has been
1953 * created. It may be for client, server or channel. This is the way
1954 * to distribute information about new registered entities in the
1957 SILC_LOG_DEBUG(("New ID packet"));
1958 if (packet->flags & SILC_PACKET_FLAG_LIST)
1959 silc_server_new_id_list(server, sock, packet);
1961 silc_server_new_id(server, sock, packet);
1964 case SILC_PACKET_NEW_CLIENT:
1966 * Received new client packet. This includes client information that
1967 * we will use to create initial client ID. After creating new
1968 * ID we will send it to the client.
1970 SILC_LOG_DEBUG(("New Client packet"));
1971 if (packet->flags & SILC_PACKET_FLAG_LIST)
1973 silc_server_new_client(server, sock, packet);
1976 case SILC_PACKET_NEW_SERVER:
1978 * Received new server packet. This includes Server ID and some other
1979 * information that we may save. This is received after server has
1982 SILC_LOG_DEBUG(("New Server packet"));
1983 if (packet->flags & SILC_PACKET_FLAG_LIST)
1985 silc_server_new_server(server, sock, packet);
1988 case SILC_PACKET_NEW_CHANNEL:
1990 * Received new channel packet. Information about new channel in the
1991 * network are distributed using this packet.
1993 SILC_LOG_DEBUG(("New Channel packet"));
1994 if (packet->flags & SILC_PACKET_FLAG_LIST)
1995 silc_server_new_channel_list(server, sock, packet);
1997 silc_server_new_channel(server, sock, packet);
2000 case SILC_PACKET_HEARTBEAT:
2002 * Received heartbeat.
2004 SILC_LOG_DEBUG(("Heartbeat packet"));
2005 if (packet->flags & SILC_PACKET_FLAG_LIST)
2009 case SILC_PACKET_KEY_AGREEMENT:
2011 * Received heartbeat.
2013 SILC_LOG_DEBUG(("Key agreement packet"));
2014 if (packet->flags & SILC_PACKET_FLAG_LIST)
2016 silc_server_key_agreement(server, sock, packet);
2019 case SILC_PACKET_REKEY:
2021 * Received re-key packet. The sender wants to regenerate the session
2024 SILC_LOG_DEBUG(("Re-key packet"));
2025 if (packet->flags & SILC_PACKET_FLAG_LIST)
2027 silc_server_rekey(server, sock, packet);
2030 case SILC_PACKET_REKEY_DONE:
2032 * The re-key is done.
2034 SILC_LOG_DEBUG(("Re-key done packet"));
2035 if (packet->flags & SILC_PACKET_FLAG_LIST)
2038 if (sock->protocol && sock->protocol->protocol &&
2039 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2041 SilcServerRekeyInternalContext *proto_ctx =
2042 (SilcServerRekeyInternalContext *)sock->protocol->context;
2044 if (proto_ctx->packet)
2045 silc_packet_context_free(proto_ctx->packet);
2047 proto_ctx->packet = silc_packet_context_dup(packet);
2049 /* Let the protocol handle the packet */
2050 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
2052 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2053 "protocol active, packet dropped."));
2058 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2064 /* Creates connection to a remote router. */
2066 void silc_server_create_connection(SilcServer server,
2067 char *remote_host, uint32 port)
2069 SilcServerConnection sconn;
2071 /* Allocate connection object for hold connection specific stuff. */
2072 sconn = silc_calloc(1, sizeof(*sconn));
2073 sconn->server = server;
2074 sconn->remote_host = strdup(remote_host);
2075 sconn->remote_port = port;
2077 silc_task_register(server->timeout_queue, 0,
2078 silc_server_connect_router,
2079 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2080 SILC_TASK_PRI_NORMAL);
2083 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2085 silc_socket_free((SilcSocketConnection)context);
2088 /* Closes connection to socket connection */
2090 void silc_server_close_connection(SilcServer server,
2091 SilcSocketConnection sock)
2093 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2095 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2096 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2097 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2098 "Router"), sock->sock));
2100 /* If any protocol is active cancel its execution */
2101 if (sock->protocol) {
2102 silc_protocol_cancel(sock->protocol, server->timeout_queue);
2103 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2104 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2105 sock->protocol = NULL;
2108 /* We won't listen for this connection anymore */
2109 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2111 /* Unregister all tasks */
2112 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2113 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2115 /* Close the actual connection */
2116 silc_net_close_connection(sock->sock);
2117 server->sockets[sock->sock] = NULL;
2119 silc_task_register(server->timeout_queue, 0,
2120 silc_server_close_connection_final,
2121 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2122 SILC_TASK_PRI_NORMAL);
2125 /* Sends disconnect message to remote connection and disconnects the
2128 void silc_server_disconnect_remote(SilcServer server,
2129 SilcSocketConnection sock,
2130 const char *fmt, ...)
2133 unsigned char buf[4096];
2138 memset(buf, 0, sizeof(buf));
2140 vsprintf(buf, fmt, ap);
2143 SILC_LOG_DEBUG(("Disconnecting remote host"));
2145 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2147 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2148 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2149 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2152 /* Notify remote end that the conversation is over. The notify message
2153 is tried to be sent immediately. */
2154 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2155 buf, strlen(buf), TRUE);
2157 /* Mark the connection to be disconnected */
2158 SILC_SET_DISCONNECTED(sock);
2159 silc_server_close_connection(server, sock);
2164 SilcClientEntry client;
2165 } *FreeClientInternal;
2167 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2169 FreeClientInternal i = (FreeClientInternal)context;
2171 silc_idlist_del_data(i->client);
2172 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2176 /* Frees client data and notifies about client's signoff. */
2178 void silc_server_free_client_data(SilcServer server,
2179 SilcSocketConnection sock,
2180 SilcClientEntry client,
2184 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2186 /* If there is pending outgoing data for the client then purge it
2187 to the network before removing the client entry. */
2188 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2189 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2190 server->stat.packets_sent++;
2192 if (sock->outbuf->data - sock->outbuf->head)
2193 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2195 silc_packet_send(sock, TRUE);
2197 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2198 SILC_UNSET_OUTBUF_PENDING(sock);
2199 silc_buffer_clear(sock->outbuf);
2202 /* Send SIGNOFF notify to routers. */
2203 if (notify && !server->standalone && server->router)
2204 silc_server_send_notify_signoff(server, server->router->connection,
2205 server->server_type == SILC_SERVER ?
2206 FALSE : TRUE, client->id, signoff);
2208 /* Remove client from all channels */
2210 silc_server_remove_from_channels(server, NULL, client,
2211 TRUE, signoff, TRUE);
2213 silc_server_remove_from_channels(server, NULL, client,
2214 FALSE, NULL, FALSE);
2216 /* We will not delete the client entry right away. We will take it
2217 into history (for WHOWAS command) for 5 minutes */
2220 silc_task_register(server->timeout_queue, 0,
2221 silc_server_free_client_data_timeout,
2223 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2224 client->data.registered = FALSE;
2226 /* Free the client entry and everything in it */
2227 server->stat.my_clients--;
2228 server->stat.clients--;
2229 if (server->server_type == SILC_ROUTER)
2230 server->stat.cell_clients--;
2233 /* Frees user_data pointer from socket connection object. This also sends
2234 appropriate notify packets to the network to inform about leaving
2237 void silc_server_free_sock_user_data(SilcServer server,
2238 SilcSocketConnection sock)
2240 SILC_LOG_DEBUG(("Start"));
2242 switch(sock->type) {
2243 case SILC_SOCKET_TYPE_CLIENT:
2245 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2246 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2249 case SILC_SOCKET_TYPE_SERVER:
2250 case SILC_SOCKET_TYPE_ROUTER:
2252 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2254 /* Free all client entries that this server owns as they will
2255 become invalid now as well. */
2257 silc_server_remove_clients_by_server(server, user_data, TRUE);
2259 /* If this was our primary router connection then we're lost to
2260 the outside world. */
2261 if (server->router == user_data) {
2262 server->id_entry->router = NULL;
2263 server->router = NULL;
2264 server->standalone = TRUE;
2267 /* Free the server entry */
2268 silc_idlist_del_data(user_data);
2269 silc_idlist_del_server(server->local_list, user_data);
2270 server->stat.my_servers--;
2271 server->stat.servers--;
2272 if (server->server_type == SILC_ROUTER)
2273 server->stat.cell_servers--;
2278 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2280 silc_idlist_del_data(user_data);
2281 silc_free(user_data);
2286 sock->user_data = NULL;
2289 /* This function is used to remove all client entries by the server `entry'.
2290 This is called when the connection is lost to the server. In this case
2291 we must invalidate all the client entries owned by the server `entry'.
2292 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2293 distributed to our local clients. */
2295 int silc_server_remove_clients_by_server(SilcServer server,
2296 SilcServerEntry entry,
2299 SilcIDCacheList list = NULL;
2300 SilcIDCacheEntry id_cache = NULL;
2301 SilcClientEntry client = NULL;
2303 SilcClientEntry *clients = NULL;
2304 uint32 clients_c = 0;
2305 unsigned char **argv = NULL;
2306 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2307 SilcHashTable servers;
2308 SilcChannelClientEntry chl;
2309 SilcChannelEntry channel;
2310 SilcHashTableList htl;
2313 SILC_LOG_DEBUG(("Start"));
2315 /* Allocate the hash table that holds the channels that require
2316 channel key re-generation after we've removed this servers clients
2317 from the channels. */
2318 servers = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2321 if (server_signoff) {
2322 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2323 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2324 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2325 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2326 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2327 memcpy(argv[argc], idp->data, idp->len);
2328 argv_lens[argc] = idp->len;
2329 argv_types[argc] = argc + 1;
2331 silc_buffer_free(idp);
2334 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2336 if (silc_idcache_list_first(list, &id_cache)) {
2338 client = (SilcClientEntry)id_cache->context;
2339 if (client->data.registered == FALSE) {
2340 if (!silc_idcache_list_next(list, &id_cache))
2346 if (client->router != entry) {
2347 if (server_signoff && client->connection) {
2348 clients = silc_realloc(clients,
2349 sizeof(*clients) * (clients_c + 1));
2350 clients[clients_c] = client;
2354 if (!silc_idcache_list_next(list, &id_cache))
2360 if (server_signoff) {
2361 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2362 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2363 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2365 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2367 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2368 memcpy(argv[argc], idp->data, idp->len);
2369 argv_lens[argc] = idp->len;
2370 argv_types[argc] = argc + 1;
2372 silc_buffer_free(idp);
2375 silc_hash_table_list(client->channels, &htl);
2376 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
2377 silc_hash_table_replace(servers, chl->channel, chl->channel);
2379 /* Remove the client entry */
2380 silc_server_remove_from_channels(server, NULL, client, FALSE,
2382 silc_idlist_del_client(server->local_list, client);
2384 if (!silc_idcache_list_next(list, &id_cache))
2388 silc_idcache_list_free(list);
2391 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2393 if (silc_idcache_list_first(list, &id_cache)) {
2395 client = (SilcClientEntry)id_cache->context;
2396 if (client->data.registered == FALSE) {
2397 if (!silc_idcache_list_next(list, &id_cache))
2403 if (client->router != entry) {
2404 if (server_signoff && client->connection) {
2405 clients = silc_realloc(clients,
2406 sizeof(*clients) * (clients_c + 1));
2407 clients[clients_c] = client;
2411 if (!silc_idcache_list_next(list, &id_cache))
2417 if (server_signoff) {
2418 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2419 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2420 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2422 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2424 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2425 memcpy(argv[argc], idp->data, idp->len);
2426 argv_lens[argc] = idp->len;
2427 argv_types[argc] = argc + 1;
2429 silc_buffer_free(idp);
2432 silc_hash_table_list(client->channels, &htl);
2433 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
2434 silc_hash_table_replace(servers, chl->channel, chl->channel);
2436 /* Remove the client entry */
2437 silc_server_remove_from_channels(server, NULL, client, FALSE,
2439 silc_idlist_del_client(server->global_list, client);
2441 if (!silc_idcache_list_next(list, &id_cache))
2445 silc_idcache_list_free(list);
2448 /* Send the SERVER_SIGNOFF notify */
2449 if (server_signoff) {
2452 /* Send SERVER_SIGNOFF notify to our primary router */
2453 if (!server->standalone && server->router &&
2454 server->router != entry) {
2455 args = silc_argument_payload_encode(1, argv, argv_lens,
2457 silc_server_send_notify_args(server,
2458 server->router->connection,
2459 server->server_type == SILC_SERVER ?
2461 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2463 silc_buffer_free(args);
2466 args = silc_argument_payload_encode(argc, argv, argv_lens,
2468 /* Send to local clients */
2469 for (i = 0; i < clients_c; i++) {
2470 silc_server_send_notify_args(server, clients[i]->connection,
2471 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2476 silc_buffer_free(args);
2477 for (i = 0; i < argc; i++)
2480 silc_free(argv_lens);
2481 silc_free(argv_types);
2484 /* We must now re-generate the channel key for all channels that had
2485 this server's client(s) on the channel. As they left the channel we
2486 must re-generate the channel key. */
2487 silc_hash_table_list(servers, &htl);
2488 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2489 silc_server_create_channel_key(server, channel, 0);
2490 silc_server_send_channel_key(server, NULL, channel,
2491 server->server_type == SILC_ROUTER ?
2492 FALSE : !server->standalone);
2494 silc_hash_table_free(servers);
2499 /* Checks whether given channel has global users. If it does this returns
2500 TRUE and FALSE if there is only locally connected clients on the channel. */
2502 int silc_server_channel_has_global(SilcChannelEntry channel)
2504 SilcChannelClientEntry chl;
2505 SilcHashTableList htl;
2507 silc_hash_table_list(channel->user_list, &htl);
2508 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2509 if (chl->client->router)
2516 /* Checks whether given channel has locally connected users. If it does this
2517 returns TRUE and FALSE if there is not one locally connected client. */
2519 int silc_server_channel_has_local(SilcChannelEntry channel)
2521 SilcChannelClientEntry chl;
2522 SilcHashTableList htl;
2524 silc_hash_table_list(channel->user_list, &htl);
2525 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2526 if (!chl->client->router)
2533 /* Removes client from all channels it has joined. This is used when client
2534 connection is disconnected. If the client on a channel is last, the
2535 channel is removed as well. This sends the SIGNOFF notify types. */
2537 void silc_server_remove_from_channels(SilcServer server,
2538 SilcSocketConnection sock,
2539 SilcClientEntry client,
2541 char *signoff_message,
2544 SilcChannelEntry channel;
2545 SilcChannelClientEntry chl;
2546 SilcHashTableList htl;
2549 SILC_LOG_DEBUG(("Start"));
2551 if (!client || !client->id)
2554 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2556 /* Remove the client from all channels. The client is removed from
2557 the channels' user list. */
2558 silc_hash_table_list(client->channels, &htl);
2559 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2560 channel = chl->channel;
2562 /* Remove channel from client's channel list */
2563 silc_hash_table_del(client->channels, channel);
2565 /* Remove channel if there is no users anymore */
2566 if (server->server_type == SILC_ROUTER &&
2567 silc_hash_table_count(channel->user_list) < 2) {
2569 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2570 if (!silc_idlist_del_channel(server->local_list, channel))
2571 silc_idlist_del_channel(server->global_list, channel);
2572 server->stat.my_channels--;
2576 /* Remove client from channel's client list */
2577 silc_hash_table_del(channel->user_list, chl->client);
2579 server->stat.my_chanclients--;
2581 /* If there is no global users on the channel anymore mark the channel
2582 as local channel. Do not check if the removed client is local client. */
2583 if (server->server_type == SILC_SERVER && channel->global_users &&
2584 chl->client->router && !silc_server_channel_has_global(channel))
2585 channel->global_users = FALSE;
2587 /* If there is not at least one local user on the channel then we don't
2588 need the channel entry anymore, we can remove it safely. */
2589 if (server->server_type == SILC_SERVER &&
2590 !silc_server_channel_has_local(channel)) {
2591 /* Notify about leaving client if this channel has global users. */
2592 if (notify && channel->global_users)
2593 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2594 SILC_NOTIFY_TYPE_SIGNOFF,
2595 signoff_message ? 2 : 1,
2596 clidp->data, clidp->len,
2597 signoff_message, signoff_message ?
2598 strlen(signoff_message) : 0);
2601 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2603 if (channel->founder_key) {
2604 /* The founder auth data exists, do not remove the channel entry */
2605 SilcChannelClientEntry chl2;
2606 SilcHashTableList htl2;
2610 silc_hash_table_list(channel->user_list, &htl2);
2611 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2612 silc_hash_table_del(chl2->client->channels, channel);
2613 silc_hash_table_del(channel->user_list, chl2->client);
2619 /* Remove the channel entry */
2620 if (!silc_idlist_del_channel(server->local_list, channel))
2621 silc_idlist_del_channel(server->global_list, channel);
2622 server->stat.my_channels--;
2626 /* Send notify to channel about client leaving SILC and thus
2627 the entire channel. */
2629 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2630 SILC_NOTIFY_TYPE_SIGNOFF,
2631 signoff_message ? 2 : 1,
2632 clidp->data, clidp->len,
2633 signoff_message, signoff_message ?
2634 strlen(signoff_message) : 0);
2636 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2637 /* Re-generate channel key */
2638 silc_server_create_channel_key(server, channel, 0);
2640 /* Send the channel key to the channel. The key of course is not sent
2641 to the client who was removed from the channel. */
2642 silc_server_send_channel_key(server, client->connection, channel,
2643 server->server_type == SILC_ROUTER ?
2644 FALSE : !server->standalone);
2648 silc_buffer_free(clidp);
2651 /* Removes client from one channel. This is used for example when client
2652 calls LEAVE command to remove itself from the channel. Returns TRUE
2653 if channel still exists and FALSE if the channel is removed when
2654 last client leaves the channel. If `notify' is FALSE notify messages
2657 int silc_server_remove_from_one_channel(SilcServer server,
2658 SilcSocketConnection sock,
2659 SilcChannelEntry channel,
2660 SilcClientEntry client,
2663 SilcChannelClientEntry chl;
2666 SILC_LOG_DEBUG(("Start"));
2668 /* Get the entry to the channel, if this client is not on the channel
2670 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2673 /* Remove the client from the channel. The client is removed from
2674 the channel's user list. */
2676 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2678 /* Remove channel from client's channel list */
2679 silc_hash_table_del(client->channels, chl->channel);
2681 /* Remove channel if there is no users anymore */
2682 if (server->server_type == SILC_ROUTER &&
2683 silc_hash_table_count(channel->user_list) < 2) {
2685 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2686 if (!silc_idlist_del_channel(server->local_list, channel))
2687 silc_idlist_del_channel(server->global_list, channel);
2688 silc_buffer_free(clidp);
2689 server->stat.my_channels--;
2693 /* Remove client from channel's client list */
2694 silc_hash_table_del(channel->user_list, chl->client);
2696 server->stat.my_chanclients--;
2698 /* If there is no global users on the channel anymore mark the channel
2699 as local channel. Do not check if the client is local client. */
2700 if (server->server_type == SILC_SERVER && channel->global_users &&
2701 chl->client->router && !silc_server_channel_has_global(channel))
2702 channel->global_users = FALSE;
2704 /* If there is not at least one local user on the channel then we don't
2705 need the channel entry anymore, we can remove it safely. */
2706 if (server->server_type == SILC_SERVER &&
2707 !silc_server_channel_has_local(channel)) {
2708 /* Notify about leaving client if this channel has global users. */
2709 if (notify && channel->global_users)
2710 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2711 SILC_NOTIFY_TYPE_LEAVE, 1,
2712 clidp->data, clidp->len);
2714 silc_buffer_free(clidp);
2717 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2719 if (channel->founder_key) {
2720 /* The founder auth data exists, do not remove the channel entry */
2721 SilcChannelClientEntry chl2;
2722 SilcHashTableList htl2;
2726 silc_hash_table_list(channel->user_list, &htl2);
2727 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2728 silc_hash_table_del(chl2->client->channels, channel);
2729 silc_hash_table_del(channel->user_list, chl2->client);
2735 /* Remove the channel entry */
2736 if (!silc_idlist_del_channel(server->local_list, channel))
2737 silc_idlist_del_channel(server->global_list, channel);
2738 server->stat.my_channels--;
2742 /* Send notify to channel about client leaving the channel */
2744 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2745 SILC_NOTIFY_TYPE_LEAVE, 1,
2746 clidp->data, clidp->len);
2748 silc_buffer_free(clidp);
2752 /* Returns TRUE if the given client is on the channel. FALSE if not.
2753 This works because we assure that the user list on the channel is
2754 always in up to date thus we can only check the channel list from
2755 `client' which is faster than checking the user list from `channel'. */
2757 int silc_server_client_on_channel(SilcClientEntry client,
2758 SilcChannelEntry channel)
2760 if (!client || !channel)
2763 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2769 /* Timeout callback. This is called if connection is idle or for some
2770 other reason is not responding within some period of time. This
2771 disconnects the remote end. */
2773 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2775 SilcServer server = (SilcServer)context;
2776 SilcSocketConnection sock = server->sockets[fd];
2778 SILC_LOG_DEBUG(("Start"));
2783 /* If we have protocol active we must assure that we call the protocol's
2784 final callback so that all the memory is freed. */
2785 if (sock->protocol) {
2786 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2787 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2791 if (sock->user_data)
2792 silc_server_free_sock_user_data(server, sock);
2794 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2795 "Connection timeout");
2798 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2799 function may be used only by router. In real SILC network all channels
2800 are created by routers thus this function is never used by normal
2803 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2804 SilcServerID *router_id,
2810 SilcChannelID *channel_id;
2811 SilcChannelEntry entry;
2815 SILC_LOG_DEBUG(("Creating new channel"));
2818 cipher = "aes-256-cbc";
2820 hmac = "hmac-sha1-96";
2822 /* Allocate cipher */
2823 if (!silc_cipher_alloc(cipher, &key))
2827 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2828 silc_cipher_free(key);
2832 channel_name = strdup(channel_name);
2834 /* Create the channel */
2835 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2836 entry = silc_idlist_add_channel(server->local_list, channel_name,
2837 SILC_CHANNEL_MODE_NONE, channel_id,
2838 NULL, key, newhmac);
2840 silc_free(channel_name);
2841 silc_cipher_free(key);
2842 silc_hmac_free(newhmac);
2846 entry->cipher = strdup(cipher);
2847 entry->hmac_name = strdup(hmac);
2849 /* Now create the actual key material */
2850 silc_server_create_channel_key(server, entry,
2851 silc_cipher_get_key_len(key) / 8);
2853 /* Notify other routers about the new channel. We send the packet
2854 to our primary route. */
2855 if (broadcast && server->standalone == FALSE)
2856 silc_server_send_new_channel(server, server->router->connection, TRUE,
2857 channel_name, entry->id,
2858 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2861 server->stat.my_channels++;
2866 /* Same as above but creates the channel with Channel ID `channel_id. */
2869 silc_server_create_new_channel_with_id(SilcServer server,
2873 SilcChannelID *channel_id,
2876 SilcChannelEntry entry;
2880 SILC_LOG_DEBUG(("Creating new channel"));
2883 cipher = "aes-256-cbc";
2885 hmac = "hmac-sha1-96";
2887 /* Allocate cipher */
2888 if (!silc_cipher_alloc(cipher, &key))
2892 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2893 silc_cipher_free(key);
2897 channel_name = strdup(channel_name);
2899 /* Create the channel */
2900 entry = silc_idlist_add_channel(server->local_list, channel_name,
2901 SILC_CHANNEL_MODE_NONE, channel_id,
2902 NULL, key, newhmac);
2904 silc_free(channel_name);
2908 /* Now create the actual key material */
2909 silc_server_create_channel_key(server, entry,
2910 silc_cipher_get_key_len(key) / 8);
2912 /* Notify other routers about the new channel. We send the packet
2913 to our primary route. */
2914 if (broadcast && server->standalone == FALSE)
2915 silc_server_send_new_channel(server, server->router->connection, TRUE,
2916 channel_name, entry->id,
2917 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2920 server->stat.my_channels++;
2925 /* Channel's key re-key timeout callback. */
2927 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2929 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2930 SilcServer server = (SilcServer)rekey->context;
2932 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2933 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2935 silc_task_register(server->timeout_queue, 0,
2936 silc_server_channel_key_rekey,
2937 (void *)rekey, 3600, 0,
2939 SILC_TASK_PRI_NORMAL);
2942 /* Generates new channel key. This is used to create the initial channel key
2943 but also to re-generate new key for channel. If `key_len' is provided
2944 it is the bytes of the key length. */
2946 void silc_server_create_channel_key(SilcServer server,
2947 SilcChannelEntry channel,
2951 unsigned char channel_key[32], hash[32];
2954 SILC_LOG_DEBUG(("Generating channel key"));
2956 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2957 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2961 if (!channel->channel_key)
2962 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2967 else if (channel->key_len)
2968 len = channel->key_len / 8;
2970 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2972 /* Create channel key */
2973 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2976 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2978 /* Remove old key if exists */
2980 memset(channel->key, 0, channel->key_len / 8);
2981 silc_free(channel->key);
2985 channel->key_len = len * 8;
2986 channel->key = silc_calloc(len, sizeof(*channel->key));
2987 memcpy(channel->key, channel_key, len);
2988 memset(channel_key, 0, sizeof(channel_key));
2990 /* Generate HMAC key from the channel key data and set it */
2992 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2993 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2994 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2995 memset(hash, 0, sizeof(hash));
2997 if (server->server_type == SILC_ROUTER) {
2998 if (!channel->rekey)
2999 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3000 channel->rekey->context = (void *)server;
3001 channel->rekey->channel = channel;
3002 channel->rekey->key_len = key_len;
3004 silc_task_unregister_by_callback(server->timeout_queue,
3005 silc_server_channel_key_rekey);
3006 silc_task_register(server->timeout_queue, 0,
3007 silc_server_channel_key_rekey,
3008 (void *)channel->rekey, 3600, 0,
3010 SILC_TASK_PRI_NORMAL);
3014 /* Saves the channel key found in the encoded `key_payload' buffer. This
3015 function is used when we receive Channel Key Payload and also when we're
3016 processing JOIN command reply. Returns entry to the channel. */
3018 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3019 SilcBuffer key_payload,
3020 SilcChannelEntry channel)
3022 SilcChannelKeyPayload payload = NULL;
3023 SilcChannelID *id = NULL;
3024 unsigned char *tmp, hash[32];
3028 SILC_LOG_DEBUG(("Start"));
3030 /* Decode channel key payload */
3031 payload = silc_channel_key_payload_parse(key_payload);
3033 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3038 /* Get the channel entry */
3041 /* Get channel ID */
3042 tmp = silc_channel_key_get_id(payload, &tmp_len);
3043 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3049 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3051 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3053 SILC_LOG_ERROR(("Received key for non-existent channel"));
3059 tmp = silc_channel_key_get_key(payload, &tmp_len);
3065 cipher = silc_channel_key_get_cipher(payload, NULL);
3071 /* Remove old key if exists */
3073 memset(channel->key, 0, channel->key_len / 8);
3074 silc_free(channel->key);
3075 silc_cipher_free(channel->channel_key);
3078 /* Create new cipher */
3079 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3084 if (channel->cipher)
3085 silc_free(channel->cipher);
3086 channel->cipher = strdup(cipher);
3089 channel->key_len = tmp_len * 8;
3090 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3091 memcpy(channel->key, tmp, tmp_len);
3092 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3094 /* Generate HMAC key from the channel key data and set it */
3096 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3097 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3098 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3100 memset(hash, 0, sizeof(hash));
3101 memset(tmp, 0, tmp_len);
3103 if (server->server_type == SILC_ROUTER) {
3104 if (!channel->rekey)
3105 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3106 channel->rekey->context = (void *)server;
3107 channel->rekey->channel = channel;
3109 silc_task_unregister_by_callback(server->timeout_queue,
3110 silc_server_channel_key_rekey);
3111 silc_task_register(server->timeout_queue, 0,
3112 silc_server_channel_key_rekey,
3113 (void *)channel->rekey, 3600, 0,
3115 SILC_TASK_PRI_NORMAL);
3122 silc_channel_key_payload_free(payload);
3127 /* Heartbeat callback. This function is set as argument for the
3128 silc_socket_set_heartbeat function. The library will call this function
3129 at the set time interval. */
3131 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3134 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3136 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3139 /* Send the heartbeat */
3140 silc_server_send_heartbeat(hb->server, sock);
3143 /* Returns assembled of all servers in the given ID list. The packet's
3144 form is dictated by the New ID payload. */
3146 static void silc_server_announce_get_servers(SilcServer server,
3148 SilcBuffer *servers)
3150 SilcIDCacheList list;
3151 SilcIDCacheEntry id_cache;
3152 SilcServerEntry entry;
3155 /* Go through all clients in the list */
3156 if (silc_idcache_get_all(id_list->servers, &list)) {
3157 if (silc_idcache_list_first(list, &id_cache)) {
3159 entry = (SilcServerEntry)id_cache->context;
3161 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3163 *servers = silc_buffer_realloc(*servers,
3165 (*servers)->truelen + idp->len :
3167 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3168 silc_buffer_put(*servers, idp->data, idp->len);
3169 silc_buffer_pull(*servers, idp->len);
3170 silc_buffer_free(idp);
3172 if (!silc_idcache_list_next(list, &id_cache))
3177 silc_idcache_list_free(list);
3181 /* This function is used by router to announce existing servers to our
3182 primary router when we've connected to it. */
3184 void silc_server_announce_servers(SilcServer server)
3186 SilcBuffer servers = NULL;
3188 SILC_LOG_DEBUG(("Announcing servers"));
3190 /* Get servers in local list */
3191 silc_server_announce_get_servers(server, server->local_list, &servers);
3193 /* Get servers in global list */
3194 silc_server_announce_get_servers(server, server->global_list, &servers);
3197 silc_buffer_push(servers, servers->data - servers->head);
3198 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3200 /* Send the packet */
3201 silc_server_packet_send(server, server->router->connection,
3202 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3203 servers->data, servers->len, TRUE);
3205 silc_buffer_free(servers);
3209 /* Returns assembled packet of all clients in the given ID list. The
3210 packet's form is dictated by the New ID Payload. */
3212 static void silc_server_announce_get_clients(SilcServer server,
3214 SilcBuffer *clients)
3216 SilcIDCacheList list;
3217 SilcIDCacheEntry id_cache;
3218 SilcClientEntry client;
3221 /* Go through all clients in the list */
3222 if (silc_idcache_get_all(id_list->clients, &list)) {
3223 if (silc_idcache_list_first(list, &id_cache)) {
3225 client = (SilcClientEntry)id_cache->context;
3227 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3229 *clients = silc_buffer_realloc(*clients,
3231 (*clients)->truelen + idp->len :
3233 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3234 silc_buffer_put(*clients, idp->data, idp->len);
3235 silc_buffer_pull(*clients, idp->len);
3236 silc_buffer_free(idp);
3238 if (!silc_idcache_list_next(list, &id_cache))
3243 silc_idcache_list_free(list);
3247 /* This function is used to announce our existing clients to our router
3248 when we've connected to it. */
3250 void silc_server_announce_clients(SilcServer server)
3252 SilcBuffer clients = NULL;
3254 SILC_LOG_DEBUG(("Announcing clients"));
3256 /* Get clients in local list */
3257 silc_server_announce_get_clients(server, server->local_list,
3260 /* As router we announce our global list as well */
3261 if (server->server_type == SILC_ROUTER)
3262 silc_server_announce_get_clients(server, server->global_list,
3266 silc_buffer_push(clients, clients->data - clients->head);
3267 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3269 /* Send the packet */
3270 silc_server_packet_send(server, server->router->connection,
3271 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3272 clients->data, clients->len, TRUE);
3274 silc_buffer_free(clients);
3279 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3284 return silc_notify_payload_encode(notify, argc, ap);
3287 /* Returns assembled packets for channel users of the `channel'. */
3289 void silc_server_announce_get_channel_users(SilcServer server,
3290 SilcChannelEntry channel,
3291 SilcBuffer *channel_users,
3292 SilcBuffer *channel_users_modes)
3294 SilcChannelClientEntry chl;
3295 SilcHashTableList htl;
3296 SilcBuffer chidp, clidp;
3299 unsigned char mode[4];
3301 SILC_LOG_DEBUG(("Start"));
3303 /* Now find all users on the channel */
3304 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3305 silc_hash_table_list(channel->user_list, &htl);
3306 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3307 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3310 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3311 clidp->data, clidp->len,
3312 chidp->data, chidp->len);
3315 silc_buffer_realloc(*channel_users,
3317 (*channel_users)->truelen + len : len));
3318 silc_buffer_pull_tail(*channel_users,
3319 ((*channel_users)->end -
3320 (*channel_users)->data));
3322 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3323 silc_buffer_pull(*channel_users, len);
3324 silc_buffer_free(tmp);
3326 /* CUMODE notify for mode change on the channel */
3327 SILC_PUT32_MSB(chl->mode, mode);
3328 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3329 3, clidp->data, clidp->len,
3331 clidp->data, clidp->len);
3333 *channel_users_modes =
3334 silc_buffer_realloc(*channel_users_modes,
3335 (*channel_users_modes ?
3336 (*channel_users_modes)->truelen + len : len));
3337 silc_buffer_pull_tail(*channel_users_modes,
3338 ((*channel_users_modes)->end -
3339 (*channel_users_modes)->data));
3341 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3342 silc_buffer_pull(*channel_users_modes, len);
3343 silc_buffer_free(tmp);
3345 silc_buffer_free(clidp);
3347 silc_buffer_free(chidp);
3350 /* Returns assembled packets for all channels and users on those channels
3351 from the given ID List. The packets are in the form dictated by the
3352 New Channel and New Channel User payloads. */
3354 void silc_server_announce_get_channels(SilcServer server,
3356 SilcBuffer *channels,
3357 SilcBuffer *channel_users,
3358 SilcBuffer **channel_users_modes,
3359 uint32 *channel_users_modes_c,
3360 SilcChannelID ***channel_ids)
3362 SilcIDCacheList list;
3363 SilcIDCacheEntry id_cache;
3364 SilcChannelEntry channel;
3369 int i = *channel_users_modes_c;
3371 SILC_LOG_DEBUG(("Start"));
3373 /* Go through all channels in the list */
3374 if (silc_idcache_get_all(id_list->channels, &list)) {
3375 if (silc_idcache_list_first(list, &id_cache)) {
3377 channel = (SilcChannelEntry)id_cache->context;
3379 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3380 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3381 name_len = strlen(channel->channel_name);
3383 len = 4 + name_len + id_len + 4;
3385 silc_buffer_realloc(*channels,
3386 (*channels ? (*channels)->truelen + len : len));
3387 silc_buffer_pull_tail(*channels,
3388 ((*channels)->end - (*channels)->data));
3389 silc_buffer_format(*channels,
3390 SILC_STR_UI_SHORT(name_len),
3391 SILC_STR_UI_XNSTRING(channel->channel_name,
3393 SILC_STR_UI_SHORT(id_len),
3394 SILC_STR_UI_XNSTRING(cid, id_len),
3395 SILC_STR_UI_INT(channel->mode),
3397 silc_buffer_pull(*channels, len);
3399 *channel_users_modes = silc_realloc(*channel_users_modes,
3400 sizeof(**channel_users_modes) *
3402 (*channel_users_modes)[i] = NULL;
3403 *channel_ids = silc_realloc(*channel_ids,
3404 sizeof(**channel_ids) * (i + 1));
3405 (*channel_ids)[i] = NULL;
3406 silc_server_announce_get_channel_users(server, channel,
3408 channel_users_modes[i]);
3409 (*channel_ids)[i] = channel->id;
3412 if (!silc_idcache_list_next(list, &id_cache))
3416 *channel_users_modes_c += i;
3419 silc_idcache_list_free(list);
3423 /* This function is used to announce our existing channels to our router
3424 when we've connected to it. This also announces the users on the
3425 channels to the router. */
3427 void silc_server_announce_channels(SilcServer server)
3429 SilcBuffer channels = NULL, channel_users = NULL;
3430 SilcBuffer *channel_users_modes = NULL;
3431 uint32 channel_users_modes_c = 0;
3432 SilcChannelID **channel_ids = NULL;
3434 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3436 /* Get channels and channel users in local list */
3437 silc_server_announce_get_channels(server, server->local_list,
3438 &channels, &channel_users,
3439 &channel_users_modes,
3440 &channel_users_modes_c,
3443 /* Get channels and channel users in global list */
3444 silc_server_announce_get_channels(server, server->global_list,
3445 &channels, &channel_users,
3446 &channel_users_modes,
3447 &channel_users_modes_c,
3451 silc_buffer_push(channels, channels->data - channels->head);
3452 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3454 /* Send the packet */
3455 silc_server_packet_send(server, server->router->connection,
3456 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3457 channels->data, channels->len,
3460 silc_buffer_free(channels);
3463 if (channel_users) {
3464 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3465 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3466 channel_users->len);
3468 /* Send the packet */
3469 silc_server_packet_send(server, server->router->connection,
3470 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3471 channel_users->data, channel_users->len,
3474 silc_buffer_free(channel_users);
3477 if (channel_users_modes) {
3480 for (i = 0; i < channel_users_modes_c; i++) {
3481 silc_buffer_push(channel_users_modes[i],
3482 channel_users_modes[i]->data -
3483 channel_users_modes[i]->head);
3484 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3485 channel_users_modes[i]->len);
3486 silc_server_packet_send_dest(server, server->router->connection,
3487 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3488 channel_ids[i], SILC_ID_CHANNEL,
3489 channel_users_modes[i]->data,
3490 channel_users_modes[i]->len,
3492 silc_buffer_free(channel_users_modes[i]);
3494 silc_free(channel_users_modes);
3495 silc_free(channel_ids);
3499 /* Failure timeout callback. If this is called then we will immediately
3500 process the received failure. We always process the failure with timeout
3501 since we do not want to blindly trust to received failure packets.
3502 This won't be called (the timeout is cancelled) if the failure was
3503 bogus (it is bogus if remote does not close the connection after sending
3506 SILC_TASK_CALLBACK(silc_server_failure_callback)
3508 SilcServerFailureContext f = (SilcServerFailureContext)context;
3510 if (f->sock->protocol) {
3511 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3512 silc_protocol_execute(f->sock->protocol, f->server->timeout_queue, 0, 0);
3518 /* Assembles user list and users mode list from the `channel'. */
3520 void silc_server_get_users_on_channel(SilcServer server,
3521 SilcChannelEntry channel,
3522 SilcBuffer *user_list,
3523 SilcBuffer *mode_list,
3526 SilcChannelClientEntry chl;
3527 SilcHashTableList htl;
3528 SilcBuffer client_id_list;
3529 SilcBuffer client_mode_list;
3531 uint32 list_count = 0;
3533 /* XXX rewrite - this does not support IPv6 based Client ID's. */
3536 silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3537 silc_hash_table_count(channel->user_list));
3539 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3540 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3541 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3542 silc_hash_table_list(channel->user_list, &htl);
3543 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3545 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3546 silc_buffer_put(client_id_list, idp->data, idp->len);
3547 silc_buffer_pull(client_id_list, idp->len);
3548 silc_buffer_free(idp);
3550 /* Client's mode on channel */
3551 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3552 silc_buffer_pull(client_mode_list, 4);
3556 silc_buffer_push(client_id_list,
3557 client_id_list->data - client_id_list->head);
3558 silc_buffer_push(client_mode_list,
3559 client_mode_list->data - client_mode_list->head);
3561 *user_list = client_id_list;
3562 *mode_list = client_mode_list;
3563 *user_count = list_count;
3566 /* Saves users and their modes to the `channel'. */
3568 void silc_server_save_users_on_channel(SilcServer server,
3569 SilcSocketConnection sock,
3570 SilcChannelEntry channel,
3571 SilcClientID *noadd,
3572 SilcBuffer user_list,
3573 SilcBuffer mode_list,
3578 /* Cache the received Client ID's and modes. This cache expires
3579 whenever server sends notify message to channel. It means two things;
3580 some user has joined or leaved the channel. XXX TODO! */
3581 for (i = 0; i < user_count; i++) {
3584 SilcClientID *client_id;
3585 SilcClientEntry client;
3588 SILC_GET16_MSB(idp_len, user_list->data + 2);
3590 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3591 silc_buffer_pull(user_list, idp_len);
3596 SILC_GET32_MSB(mode, mode_list->data);
3597 silc_buffer_pull(mode_list, 4);
3599 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3600 silc_free(client_id);
3604 /* Check if we have this client cached already. */
3605 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3608 client = silc_idlist_find_client_by_id(server->global_list,
3611 /* If router did not find such Client ID in its lists then this must
3612 be bogus client or some router in the net is buggy. */
3613 if (server->server_type == SILC_ROUTER) {
3614 silc_free(client_id);
3618 /* We don't have that client anywhere, add it. The client is added
3619 to global list since server didn't have it in the lists so it must be
3621 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3622 silc_id_dup(client_id, SILC_ID_CLIENT),
3623 sock->user_data, NULL);
3625 silc_free(client_id);
3629 client->data.registered = TRUE;
3632 silc_free(client_id);
3634 if (!silc_server_client_on_channel(client, channel)) {
3635 /* Client was not on the channel, add it. */
3636 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3637 chl->client = client;
3639 chl->channel = channel;
3640 silc_hash_table_add(channel->user_list, chl->client, chl);
3641 silc_hash_table_add(client->channels, chl->channel, chl);
3646 /* Lookups route to the client indicated by the `id_data'. The connection
3647 object and internal data object is returned. Returns NULL if route
3648 could not be found to the client. If the `client_id' is specified then
3649 it is used and the `id_data' is ignored. */
3651 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3652 unsigned char *id_data,
3654 SilcClientID *client_id,
3655 SilcIDListData *idata)
3658 SilcClientEntry client;
3660 SILC_LOG_DEBUG(("Start"));
3662 /* Decode destination Client ID */
3664 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3666 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3670 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3673 /* If the destination belongs to our server we don't have to route
3674 the packet anywhere but to send it to the local destination. */
3675 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3679 if (client && client->data.registered == FALSE)
3682 /* If we are router and the client has router then the client is in
3683 our cell but not directly connected to us. */
3684 if (server->server_type == SILC_ROUTER && client->router) {
3685 /* We are of course in this case the client's router thus the real
3686 "router" of the client is the server who owns the client. Thus
3687 we will send the packet to that server. */
3689 *idata = (SilcIDListData)client->router;
3690 return client->router->connection;
3693 /* Seems that client really is directly connected to us */
3695 *idata = (SilcIDListData)client;
3696 return client->connection;
3699 /* Destination belongs to someone not in this server. If we are normal
3700 server our action is to send the packet to our router. */
3701 if (server->server_type == SILC_SERVER && !server->standalone) {
3704 *idata = (SilcIDListData)server->router;
3705 return server->router->connection;
3708 /* We are router and we will perform route lookup for the destination
3709 and send the packet to fastest route. */
3710 if (server->server_type == SILC_ROUTER && !server->standalone) {
3711 /* Check first that the ID is valid */
3712 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3714 SilcSocketConnection dst_sock;
3716 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3720 *idata = (SilcIDListData)dst_sock->user_data;
3729 /* Encodes and returns channel list of channels the `client' has joined.
3730 Secret channels are not put to the list. */
3732 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3733 SilcClientEntry client)
3735 SilcBuffer buffer = NULL;
3736 SilcChannelEntry channel;
3737 SilcChannelClientEntry chl;
3738 SilcHashTableList htl;
3744 silc_hash_table_list(client->channels, &htl);
3745 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3746 channel = chl->channel;
3748 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3751 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3752 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3753 name_len = strlen(channel->channel_name);
3755 len = 4 + name_len + id_len + 4;
3756 buffer = silc_buffer_realloc(buffer,
3757 (buffer ? (buffer)->truelen + len : len));
3758 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3759 silc_buffer_format(buffer,
3760 SILC_STR_UI_SHORT(name_len),
3761 SILC_STR_UI_XNSTRING(channel->channel_name,
3763 SILC_STR_UI_SHORT(id_len),
3764 SILC_STR_UI_XNSTRING(cid, id_len),
3765 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3767 silc_buffer_pull(buffer, len);
3772 silc_buffer_push(buffer, buffer->data - buffer->head);
3777 /* Finds client entry by Client ID and if it is not found then resolves
3778 it using WHOIS command. */
3780 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3781 SilcClientID *client_id)
3783 SilcClientEntry client;
3785 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3787 client = silc_idlist_find_client_by_id(server->global_list,
3789 if (!client && server->server_type == SILC_ROUTER)
3793 if (!client && server->standalone)
3796 if (!client || !client->nickname || !client->username) {
3797 SilcBuffer buffer, idp;
3799 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3800 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3801 ++server->cmd_ident, 1,
3802 3, idp->data, idp->len);
3803 silc_server_packet_send(server, client ? client->router->connection :
3804 server->router->connection,
3805 SILC_PACKET_COMMAND, 0,
3806 buffer->data, buffer->len, FALSE);
3807 silc_buffer_free(idp);
3808 silc_buffer_free(buffer);
3814 /* A timeout callback for the re-key. We will be the initiator of the
3817 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3819 SilcSocketConnection sock = (SilcSocketConnection)context;
3820 SilcIDListData idata = (SilcIDListData)sock->user_data;
3821 SilcServer server = (SilcServer)idata->rekey->context;
3822 SilcProtocol protocol;
3823 SilcServerRekeyInternalContext *proto_ctx;
3825 SILC_LOG_DEBUG(("Start"));
3827 /* Allocate internal protocol context. This is sent as context
3829 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3830 proto_ctx->server = (void *)server;
3831 proto_ctx->sock = sock;
3832 proto_ctx->responder = FALSE;
3833 proto_ctx->pfs = idata->rekey->pfs;
3835 /* Perform rekey protocol. Will call the final callback after the
3836 protocol is over. */
3837 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3838 &protocol, proto_ctx, silc_server_rekey_final);
3839 sock->protocol = protocol;
3841 /* Run the protocol */
3842 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
3844 /* Re-register re-key timeout */
3845 silc_task_register(server->timeout_queue, sock->sock,
3846 silc_server_rekey_callback,
3847 context, idata->rekey->timeout, 0,
3848 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3851 /* The final callback for the REKEY protocol. This will actually take the
3852 new key material into use. */
3854 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3856 SilcProtocol protocol = (SilcProtocol)context;
3857 SilcServerRekeyInternalContext *ctx =
3858 (SilcServerRekeyInternalContext *)protocol->context;
3859 SilcServer server = (SilcServer)ctx->server;
3860 SilcSocketConnection sock = ctx->sock;
3862 SILC_LOG_DEBUG(("Start"));
3864 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3865 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3866 /* Error occured during protocol */
3867 silc_protocol_cancel(protocol, server->timeout_queue);
3868 silc_protocol_free(protocol);
3869 sock->protocol = NULL;
3871 silc_packet_context_free(ctx->packet);
3873 silc_ske_free(ctx->ske);
3879 silc_protocol_free(protocol);
3880 sock->protocol = NULL;
3882 silc_packet_context_free(ctx->packet);
3884 silc_ske_free(ctx->ske);