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 /* Host lookup callbcak that is called after the incoming connection's
935 IP and FQDN lookup is performed. This will actually check the acceptance
936 of the incoming connection and will register the key exchange protocol
937 for this connection. */
940 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
943 SilcServer server = (SilcServer)context;
944 SilcServerKEInternalContext *proto_ctx;
945 void *cconfig, *sconfig, *rconfig;
946 SilcServerConfigSectionDenyConnection *deny;
949 SILC_LOG_DEBUG(("Start"));
951 /* Check whether we could resolve both IP and FQDN. */
952 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
953 server->params->require_reverse_mapping)) {
954 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
955 sock->hostname ? sock->hostname :
956 sock->ip ? sock->ip : ""));
957 server->stat.conn_failures++;
958 silc_server_disconnect_remote(server, sock,
959 "Server closed connection: Unknown host");
963 /* Register the connection for network input and output. This sets
964 that scheduler will listen for incoming packets for this connection
965 and sets that outgoing packets may be sent to this connection as well.
966 However, this doesn't set the scheduler for outgoing traffic, it
967 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
968 later when outgoing data is available. */
969 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
971 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
974 port = server->sockets[server->sock]->port; /* Listenning port */
976 /* Check whether this connection is denied to connect to us. */
977 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
979 deny = silc_server_config_denied_conn(server->config, sock->hostname,
982 /* The connection is denied */
983 SILC_LOG_INFO(("Connection %s (%s) is denied",
984 sock->hostname, sock->ip));
985 silc_server_disconnect_remote(server, sock, deny->comment ?
987 "Server closed connection: "
988 "Connection refused");
989 server->stat.conn_failures++;
993 /* Check whether we have configred this sort of connection at all. We
994 have to check all configurations since we don't know what type of
995 connection this is. */
996 if (!(cconfig = silc_server_config_find_client_conn(server->config,
998 cconfig = silc_server_config_find_client_conn(server->config,
1001 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1004 sconfig = silc_server_config_find_server_conn(server->config,
1007 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1009 rconfig = silc_server_config_find_router_conn(server->config,
1012 if (!cconfig && !sconfig && !rconfig) {
1013 silc_server_disconnect_remote(server, sock,
1014 "Server closed connection: "
1015 "Connection refused");
1016 server->stat.conn_failures++;
1020 /* The connection is allowed */
1022 /* Allocate internal context for key exchange protocol. This is
1023 sent as context for the protocol. */
1024 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1025 proto_ctx->server = context;
1026 proto_ctx->sock = sock;
1027 proto_ctx->rng = server->rng;
1028 proto_ctx->responder = TRUE;
1029 proto_ctx->cconfig = cconfig;
1030 proto_ctx->sconfig = sconfig;
1031 proto_ctx->rconfig = rconfig;
1033 /* Prepare the connection for key exchange protocol. We allocate the
1034 protocol but will not start it yet. The connector will be the
1035 initiator of the protocol thus we will wait for initiation from
1036 there before we start the protocol. */
1037 server->stat.auth_attempts++;
1038 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1039 &sock->protocol, proto_ctx,
1040 silc_server_accept_new_connection_second);
1042 /* Register a timeout task that will be executed if the connector
1043 will not start the key exchange protocol within 60 seconds. For
1044 now, this is a hard coded limit. After 60 secs the connection will
1045 be closed if the key exchange protocol has not been started. */
1046 proto_ctx->timeout_task =
1047 silc_task_register(server->timeout_queue, sock->sock,
1048 silc_server_timeout_remote,
1054 /* Accepts new connections to the server. Accepting new connections are
1055 done in three parts to make it async. */
1057 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1059 SilcServer server = (SilcServer)context;
1060 SilcSocketConnection newsocket;
1063 SILC_LOG_DEBUG(("Accepting new connection"));
1065 server->stat.conn_attempts++;
1067 sock = silc_net_accept_connection(server->sock);
1069 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1070 server->stat.conn_failures++;
1074 /* Check max connections */
1075 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1076 SILC_LOG_ERROR(("Refusing connection, server is full"));
1077 server->stat.conn_failures++;
1081 /* Set socket options */
1082 silc_net_set_socket_nonblock(sock);
1083 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1085 /* We don't create a ID yet, since we don't know what type of connection
1086 this is yet. But, we do add the connection to the socket table. */
1087 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1088 server->sockets[sock] = newsocket;
1090 /* Perform asynchronous host lookup. This will lookup the IP and the
1091 FQDN of the remote connection. After the lookup is done the connection
1092 is accepted further. */
1093 silc_socket_host_lookup(newsocket, TRUE,
1094 silc_server_accept_new_connection_lookup, context,
1095 server->timeout_queue);
1098 /* Second part of accepting new connection. Key exchange protocol has been
1099 performed and now it is time to do little connection authentication
1100 protocol to figure out whether this connection is client or server
1101 and whether it has right to access this server (especially server
1102 connections needs to be authenticated). */
1104 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1106 SilcProtocol protocol = (SilcProtocol)context;
1107 SilcServerKEInternalContext *ctx =
1108 (SilcServerKEInternalContext *)protocol->context;
1109 SilcServer server = (SilcServer)ctx->server;
1110 SilcSocketConnection sock = ctx->sock;
1111 SilcServerConnAuthInternalContext *proto_ctx;
1113 SILC_LOG_DEBUG(("Start"));
1115 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1116 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1117 /* Error occured during protocol */
1118 silc_protocol_free(protocol);
1119 sock->protocol = NULL;
1120 silc_ske_free_key_material(ctx->keymat);
1122 silc_packet_context_free(ctx->packet);
1124 silc_ske_free(ctx->ske);
1126 silc_free(ctx->dest_id);
1128 silc_task_unregister_by_callback(server->timeout_queue,
1129 silc_server_failure_callback);
1130 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1131 "Key exchange failed");
1132 server->stat.auth_failures++;
1136 /* We now have the key material as the result of the key exchange
1137 protocol. Take the key material into use. Free the raw key material
1138 as soon as we've set them into use. */
1139 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1140 ctx->ske->prop->cipher,
1141 ctx->ske->prop->pkcs,
1142 ctx->ske->prop->hash,
1143 ctx->ske->prop->hmac,
1144 ctx->ske->prop->group,
1146 silc_protocol_free(protocol);
1147 sock->protocol = NULL;
1148 silc_ske_free_key_material(ctx->keymat);
1150 silc_packet_context_free(ctx->packet);
1152 silc_ske_free(ctx->ske);
1154 silc_free(ctx->dest_id);
1156 silc_task_unregister_by_callback(server->timeout_queue,
1157 silc_server_failure_callback);
1158 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1159 "Key exchange failed");
1160 server->stat.auth_failures++;
1163 silc_ske_free_key_material(ctx->keymat);
1165 /* Allocate internal context for the authentication protocol. This
1166 is sent as context for the protocol. */
1167 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1168 proto_ctx->server = (void *)server;
1169 proto_ctx->sock = sock;
1170 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1171 proto_ctx->responder = TRUE;
1172 proto_ctx->dest_id_type = ctx->dest_id_type;
1173 proto_ctx->dest_id = ctx->dest_id;
1174 proto_ctx->cconfig = ctx->cconfig;
1175 proto_ctx->sconfig = ctx->sconfig;
1176 proto_ctx->rconfig = ctx->rconfig;
1178 /* Free old protocol as it is finished now */
1179 silc_protocol_free(protocol);
1181 silc_packet_context_free(ctx->packet);
1183 sock->protocol = NULL;
1185 /* Allocate the authentication protocol. This is allocated here
1186 but we won't start it yet. We will be receiving party of this
1187 protocol thus we will wait that connecting party will make
1188 their first move. */
1189 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1190 &sock->protocol, proto_ctx,
1191 silc_server_accept_new_connection_final);
1193 /* Register timeout task. If the protocol is not executed inside
1194 this timelimit the connection will be terminated. Currently
1195 this is 60 seconds and is hard coded limit (XXX). */
1196 proto_ctx->timeout_task =
1197 silc_task_register(server->timeout_queue, sock->sock,
1198 silc_server_timeout_remote,
1199 (void *)server, 60, 0,
1204 /* Final part of accepting new connection. The connection has now
1205 been authenticated and keys has been exchanged. We also know whether
1206 this is client or server connection. */
1208 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1210 SilcProtocol protocol = (SilcProtocol)context;
1211 SilcServerConnAuthInternalContext *ctx =
1212 (SilcServerConnAuthInternalContext *)protocol->context;
1213 SilcServer server = (SilcServer)ctx->server;
1214 SilcSocketConnection sock = ctx->sock;
1215 SilcServerHBContext hb_context;
1216 void *id_entry = NULL;
1218 SILC_LOG_DEBUG(("Start"));
1220 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1221 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1222 /* Error occured during protocol */
1223 silc_protocol_free(protocol);
1224 sock->protocol = NULL;
1226 silc_packet_context_free(ctx->packet);
1228 silc_ske_free(ctx->ske);
1230 silc_free(ctx->dest_id);
1233 sock->protocol = NULL;
1234 silc_task_unregister_by_callback(server->timeout_queue,
1235 silc_server_failure_callback);
1236 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1237 "Authentication failed");
1238 server->stat.auth_failures++;
1242 switch(ctx->conn_type) {
1243 case SILC_SOCKET_TYPE_CLIENT:
1245 SilcClientEntry client;
1247 SILC_LOG_DEBUG(("Remote host is client"));
1248 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1251 /* Add the client to the client ID cache. The nickname and Client ID
1252 and other information is created after we have received NEW_CLIENT
1253 packet from client. */
1254 client = silc_idlist_add_client(server->local_list,
1255 NULL, NULL, NULL, NULL, NULL, sock);
1257 SILC_LOG_ERROR(("Could not add new client to cache"));
1258 silc_free(sock->user_data);
1259 silc_server_disconnect_remote(server, sock,
1260 "Server closed connection: "
1261 "Authentication failed");
1262 server->stat.auth_failures++;
1267 server->stat.my_clients++;
1268 server->stat.clients++;
1269 if (server->server_type == SILC_ROUTER)
1270 server->stat.cell_clients++;
1272 id_entry = (void *)client;
1275 case SILC_SOCKET_TYPE_SERVER:
1276 case SILC_SOCKET_TYPE_ROUTER:
1278 SilcServerEntry new_server;
1279 SilcServerConfigSectionServerConnection *conn =
1280 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1281 ctx->sconfig : ctx->rconfig;
1283 SILC_LOG_DEBUG(("Remote host is %s",
1284 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1285 "server" : "router"));
1286 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1287 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1288 "server" : "router"));
1290 /* Add the server into server cache. The server name and Server ID
1291 is updated after we have received NEW_SERVER packet from the
1292 server. We mark ourselves as router for this server if we really
1295 silc_idlist_add_server(server->local_list, NULL,
1296 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1297 SILC_SERVER : SILC_ROUTER, NULL,
1298 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1299 server->id_entry : NULL, sock);
1301 SILC_LOG_ERROR(("Could not add new server to cache"));
1302 silc_free(sock->user_data);
1303 silc_server_disconnect_remote(server, sock,
1304 "Server closed connection: "
1305 "Authentication failed");
1306 server->stat.auth_failures++;
1311 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1312 server->stat.my_servers++;
1314 server->stat.my_routers++;
1315 server->stat.servers++;
1317 id_entry = (void *)new_server;
1319 /* Check whether this connection is to be our primary router connection
1320 if we dont' already have the primary route. */
1321 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1322 if (silc_server_config_is_primary_route(server->config) &&
1326 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1327 server->standalone = FALSE;
1328 if (!server->id_entry->router) {
1329 server->id_entry->router = id_entry;
1330 server->router = id_entry;
1340 sock->type = ctx->conn_type;
1342 /* Add the common data structure to the ID entry. */
1344 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1346 /* Add to sockets internal pointer for fast referencing */
1347 silc_free(sock->user_data);
1348 sock->user_data = id_entry;
1350 /* Connection has been fully established now. Everything is ok. */
1351 SILC_LOG_DEBUG(("New connection authenticated"));
1353 /* Perform keepalive. The `hb_context' will be freed automatically
1354 when finally calling the silc_socket_free function. XXX hardcoded
1356 hb_context = silc_calloc(1, sizeof(*hb_context));
1357 hb_context->server = server;
1358 silc_socket_set_heartbeat(sock, 600, hb_context,
1359 silc_server_perform_heartbeat,
1360 server->timeout_queue);
1363 silc_task_unregister_by_callback(server->timeout_queue,
1364 silc_server_failure_callback);
1365 silc_protocol_free(protocol);
1367 silc_packet_context_free(ctx->packet);
1369 silc_ske_free(ctx->ske);
1371 silc_free(ctx->dest_id);
1373 sock->protocol = NULL;
1376 /* This function is used to read packets from network and send packets to
1377 network. This is usually a generic task. */
1379 SILC_TASK_CALLBACK(silc_server_packet_process)
1381 SilcServer server = (SilcServer)context;
1382 SilcSocketConnection sock = server->sockets[fd];
1383 SilcIDListData idata;
1384 SilcCipher cipher = NULL;
1385 SilcHmac hmac = NULL;
1391 SILC_LOG_DEBUG(("Processing packet"));
1393 /* Packet sending */
1395 if (type == SILC_TASK_WRITE) {
1396 /* Do not send data to disconnected connection */
1397 if (SILC_IS_DISCONNECTED(sock))
1400 server->stat.packets_sent++;
1402 if (sock->outbuf->data - sock->outbuf->head)
1403 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1405 /* Send the packet */
1406 ret = silc_packet_send(sock, TRUE);
1408 /* If returned -2 could not write to connection now, will do
1414 SILC_LOG_ERROR(("Error sending packet to connection "
1415 "%s:%d [%s]", sock->hostname, sock->port,
1416 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1417 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1418 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1423 /* The packet has been sent and now it is time to set the connection
1424 back to only for input. When there is again some outgoing data
1425 available for this connection it will be set for output as well.
1426 This call clears the output setting and sets it only for input. */
1427 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1428 SILC_UNSET_OUTBUF_PENDING(sock);
1430 silc_buffer_clear(sock->outbuf);
1434 /* Packet receiving */
1436 /* Read some data from connection */
1437 ret = silc_packet_receive(sock);
1441 SILC_LOG_ERROR(("Error receiving packet from connection "
1442 "%s:%d [%s]", sock->hostname, sock->port,
1443 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1444 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1445 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1452 SILC_LOG_DEBUG(("Read EOF"));
1454 /* If connection is disconnecting already we will finally
1455 close the connection */
1456 if (SILC_IS_DISCONNECTING(sock)) {
1457 if (sock->user_data)
1458 silc_server_free_sock_user_data(server, sock);
1459 silc_server_close_connection(server, sock);
1463 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1464 SILC_SET_DISCONNECTING(sock);
1466 /* If the closed connection was our primary router connection the
1467 start re-connecting phase. */
1468 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1469 sock == server->router->connection)
1470 silc_task_register(server->timeout_queue, 0,
1471 silc_server_connect_to_router,
1474 SILC_TASK_PRI_NORMAL);
1476 if (sock->user_data)
1477 silc_server_free_sock_user_data(server, sock);
1478 silc_server_close_connection(server, sock);
1482 /* If connection is disconnecting or disconnected we will ignore
1484 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1485 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1489 server->stat.packets_received++;
1491 /* Get keys and stuff from ID entry */
1492 idata = (SilcIDListData)sock->user_data;
1494 idata->last_receive = time(NULL);
1495 cipher = idata->receive_key;
1496 hmac = idata->hmac_receive;
1499 /* Process the packet. This will call the parser that will then
1500 decrypt and parse the packet. */
1501 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1505 /* Callback function that the silc_packet_decrypt will call to make the
1506 decision whether the packet is normal or special packet. We will
1507 return TRUE if it is normal and FALSE if it is special */
1509 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1511 SilcPacketContext *packet,
1514 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1515 SilcServer server = (SilcServer)parse_ctx->context;
1517 /* Packet is normal packet, if:
1519 1) packet is private message packet and does not have private key set
1520 2) is other packet than channel message packet
1521 3) is channel message packet and remote is router and we are router
1523 all other packets are special packets
1526 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1527 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1530 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1531 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1532 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1533 server->server_type == SILC_ROUTER))
1539 /* Parses whole packet, received earlier. */
1541 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1543 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1544 SilcServer server = (SilcServer)parse_ctx->context;
1545 SilcSocketConnection sock = parse_ctx->sock;
1546 SilcPacketContext *packet = parse_ctx->packet;
1547 SilcIDListData idata = (SilcIDListData)sock->user_data;
1550 SILC_LOG_DEBUG(("Start"));
1552 /* Decrypt the received packet */
1553 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1554 idata ? idata->hmac_receive : NULL,
1555 packet->buffer, packet,
1556 silc_server_packet_decrypt_check, parse_ctx);
1558 SILC_LOG_WARNING(("Packet decryption failed for connection "
1559 "%s:%d [%s]", sock->hostname, sock->port,
1560 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1561 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1562 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1568 /* Parse the packet. Packet type is returned. */
1569 ret = silc_packet_parse(packet);
1571 /* Parse the packet header in special way as this is "special"
1573 ret = silc_packet_parse_special(packet);
1576 if (ret == SILC_PACKET_NONE)
1579 /* Check that the the current client ID is same as in the client's packet. */
1580 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1581 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1582 if (client && client->id) {
1583 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1584 packet->src_id_type);
1585 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1593 if (server->server_type == SILC_ROUTER) {
1594 /* Route the packet if it is not destined to us. Other ID types but
1595 server are handled separately after processing them. */
1596 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1597 packet->dst_id_type == SILC_ID_SERVER &&
1598 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1599 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1601 /* Route the packet to fastest route for the destination ID */
1602 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1603 packet->dst_id_type);
1606 silc_server_packet_route(server,
1607 silc_server_route_get(server, id,
1608 packet->dst_id_type),
1615 /* Parse the incoming packet type */
1616 silc_server_packet_parse_type(server, sock, packet);
1618 if (server->server_type == SILC_ROUTER) {
1619 /* Broadcast packet if it is marked as broadcast packet and it is
1620 originated from router and we are router. */
1621 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1622 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1623 !server->standalone) {
1624 silc_server_packet_broadcast(server, server->router->connection, packet);
1629 /* silc_buffer_clear(sock->inbuf); */
1630 silc_packet_context_free(packet);
1631 silc_free(parse_ctx);
1634 /* Parser callback called by silc_packet_receive_process. This merely
1635 registers timeout that will handle the actual parsing when appropriate. */
1637 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1639 SilcServer server = (SilcServer)parser_context->context;
1640 SilcSocketConnection sock = parser_context->sock;
1642 switch (sock->type) {
1643 case SILC_SOCKET_TYPE_UNKNOWN:
1644 case SILC_SOCKET_TYPE_CLIENT:
1645 /* Parse the packet with timeout */
1646 silc_task_register(server->timeout_queue, sock->sock,
1647 silc_server_packet_parse_real,
1648 (void *)parser_context, 0, 100000,
1650 SILC_TASK_PRI_NORMAL);
1652 case SILC_SOCKET_TYPE_SERVER:
1653 case SILC_SOCKET_TYPE_ROUTER:
1654 /* Packets from servers are parsed as soon as possible */
1655 silc_task_register(server->timeout_queue, sock->sock,
1656 silc_server_packet_parse_real,
1657 (void *)parser_context, 0, 1,
1659 SILC_TASK_PRI_NORMAL);
1666 /* Parses the packet type and calls what ever routines the packet type
1667 requires. This is done for all incoming packets. */
1669 void silc_server_packet_parse_type(SilcServer server,
1670 SilcSocketConnection sock,
1671 SilcPacketContext *packet)
1673 SilcPacketType type = packet->type;
1675 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1677 /* Parse the packet type */
1679 case SILC_PACKET_DISCONNECT:
1680 SILC_LOG_DEBUG(("Disconnect packet"));
1681 if (packet->flags & SILC_PACKET_FLAG_LIST)
1685 case SILC_PACKET_SUCCESS:
1687 * Success received for something. For now we can have only
1688 * one protocol for connection executing at once hence this
1689 * success message is for whatever protocol is executing currently.
1691 SILC_LOG_DEBUG(("Success packet"));
1692 if (packet->flags & SILC_PACKET_FLAG_LIST)
1695 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1698 case SILC_PACKET_FAILURE:
1700 * Failure received for something. For now we can have only
1701 * one protocol for connection executing at once hence this
1702 * failure message is for whatever protocol is executing currently.
1704 SILC_LOG_DEBUG(("Failure packet"));
1705 if (packet->flags & SILC_PACKET_FLAG_LIST)
1707 if (sock->protocol) {
1708 SilcServerFailureContext f;
1709 f = silc_calloc(1, sizeof(*f));
1713 /* We will wait 5 seconds to process this failure packet */
1714 silc_task_register(server->timeout_queue, sock->sock,
1715 silc_server_failure_callback, (void *)f, 5, 0,
1716 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1720 case SILC_PACKET_REJECT:
1721 SILC_LOG_DEBUG(("Reject packet"));
1722 if (packet->flags & SILC_PACKET_FLAG_LIST)
1727 case SILC_PACKET_NOTIFY:
1729 * Received notify packet. Server can receive notify packets from
1730 * router. Server then relays the notify messages to clients if needed.
1732 SILC_LOG_DEBUG(("Notify packet"));
1733 if (packet->flags & SILC_PACKET_FLAG_LIST)
1734 silc_server_notify_list(server, sock, packet);
1736 silc_server_notify(server, sock, packet);
1742 case SILC_PACKET_CHANNEL_MESSAGE:
1744 * Received channel message. Channel messages are special packets
1745 * (although probably most common ones) thus they are handled
1748 SILC_LOG_DEBUG(("Channel Message packet"));
1749 if (packet->flags & SILC_PACKET_FLAG_LIST)
1751 silc_server_channel_message(server, sock, packet);
1754 case SILC_PACKET_CHANNEL_KEY:
1756 * Received key for channel. As channels are created by the router
1757 * the keys are as well. We will distribute the key to all of our
1758 * locally connected clients on the particular channel. Router
1759 * never receives this channel and thus is ignored.
1761 SILC_LOG_DEBUG(("Channel Key packet"));
1762 if (packet->flags & SILC_PACKET_FLAG_LIST)
1764 silc_server_channel_key(server, sock, packet);
1770 case SILC_PACKET_COMMAND:
1772 * Recived command. Processes the command request and allocates the
1773 * command context and calls the command.
1775 SILC_LOG_DEBUG(("Command packet"));
1776 if (packet->flags & SILC_PACKET_FLAG_LIST)
1778 silc_server_command_process(server, sock, packet);
1781 case SILC_PACKET_COMMAND_REPLY:
1783 * Received command reply packet. Received command reply to command. It
1784 * may be reply to command sent by us or reply to command sent by client
1785 * that we've routed further.
1787 SILC_LOG_DEBUG(("Command Reply packet"));
1788 if (packet->flags & SILC_PACKET_FLAG_LIST)
1790 silc_server_command_reply(server, sock, packet);
1794 * Private Message packets
1796 case SILC_PACKET_PRIVATE_MESSAGE:
1798 * Received private message packet. The packet is coming from either
1801 SILC_LOG_DEBUG(("Private Message packet"));
1802 if (packet->flags & SILC_PACKET_FLAG_LIST)
1804 silc_server_private_message(server, sock, packet);
1807 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1809 * Private message key packet.
1811 if (packet->flags & SILC_PACKET_FLAG_LIST)
1813 silc_server_private_message_key(server, sock, packet);
1817 * Key Exchange protocol packets
1819 case SILC_PACKET_KEY_EXCHANGE:
1820 SILC_LOG_DEBUG(("KE packet"));
1821 if (packet->flags & SILC_PACKET_FLAG_LIST)
1824 if (sock->protocol && sock->protocol->protocol &&
1825 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1827 SilcServerKEInternalContext *proto_ctx =
1828 (SilcServerKEInternalContext *)sock->protocol->context;
1830 proto_ctx->packet = silc_packet_context_dup(packet);
1832 /* Let the protocol handle the packet */
1833 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 100000);
1835 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1836 "protocol active, packet dropped."));
1840 case SILC_PACKET_KEY_EXCHANGE_1:
1841 SILC_LOG_DEBUG(("KE 1 packet"));
1842 if (packet->flags & SILC_PACKET_FLAG_LIST)
1845 if (sock->protocol && sock->protocol->protocol &&
1846 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1847 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1849 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1850 SilcServerRekeyInternalContext *proto_ctx =
1851 (SilcServerRekeyInternalContext *)sock->protocol->context;
1853 if (proto_ctx->packet)
1854 silc_packet_context_free(proto_ctx->packet);
1856 proto_ctx->packet = silc_packet_context_dup(packet);
1858 /* Let the protocol handle the packet */
1859 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1861 SilcServerKEInternalContext *proto_ctx =
1862 (SilcServerKEInternalContext *)sock->protocol->context;
1864 if (proto_ctx->packet)
1865 silc_packet_context_free(proto_ctx->packet);
1867 proto_ctx->packet = silc_packet_context_dup(packet);
1868 proto_ctx->dest_id_type = packet->src_id_type;
1869 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1870 packet->src_id_type);
1871 if (!proto_ctx->dest_id)
1874 /* Let the protocol handle the packet */
1875 silc_protocol_execute(sock->protocol, server->timeout_queue,
1879 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1880 "protocol active, packet dropped."));
1884 case SILC_PACKET_KEY_EXCHANGE_2:
1885 SILC_LOG_DEBUG(("KE 2 packet"));
1886 if (packet->flags & SILC_PACKET_FLAG_LIST)
1889 if (sock->protocol && sock->protocol->protocol &&
1890 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1891 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1893 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1894 SilcServerRekeyInternalContext *proto_ctx =
1895 (SilcServerRekeyInternalContext *)sock->protocol->context;
1897 if (proto_ctx->packet)
1898 silc_packet_context_free(proto_ctx->packet);
1900 proto_ctx->packet = silc_packet_context_dup(packet);
1902 /* Let the protocol handle the packet */
1903 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1905 SilcServerKEInternalContext *proto_ctx =
1906 (SilcServerKEInternalContext *)sock->protocol->context;
1908 if (proto_ctx->packet)
1909 silc_packet_context_free(proto_ctx->packet);
1911 proto_ctx->packet = silc_packet_context_dup(packet);
1912 proto_ctx->dest_id_type = packet->src_id_type;
1913 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1914 packet->src_id_type);
1915 if (!proto_ctx->dest_id)
1918 /* Let the protocol handle the packet */
1919 silc_protocol_execute(sock->protocol, server->timeout_queue,
1923 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1924 "protocol active, packet dropped."));
1928 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1930 * Connection authentication request packet. When we receive this packet
1931 * we will send to the other end information about our mandatory
1932 * authentication method for the connection. This packet maybe received
1935 SILC_LOG_DEBUG(("Connection authentication request packet"));
1936 if (packet->flags & SILC_PACKET_FLAG_LIST)
1938 silc_server_connection_auth_request(server, sock, packet);
1942 * Connection Authentication protocol packets
1944 case SILC_PACKET_CONNECTION_AUTH:
1945 /* Start of the authentication protocol. We receive here the
1946 authentication data and will verify it. */
1947 SILC_LOG_DEBUG(("Connection auth packet"));
1948 if (packet->flags & SILC_PACKET_FLAG_LIST)
1951 if (sock->protocol && sock->protocol->protocol->type
1952 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1954 SilcServerConnAuthInternalContext *proto_ctx =
1955 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1957 proto_ctx->packet = silc_packet_context_dup(packet);
1959 /* Let the protocol handle the packet */
1960 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1962 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1963 "protocol active, packet dropped."));
1967 case SILC_PACKET_NEW_ID:
1969 * Received New ID packet. This includes some new ID that has been
1970 * created. It may be for client, server or channel. This is the way
1971 * to distribute information about new registered entities in the
1974 SILC_LOG_DEBUG(("New ID packet"));
1975 if (packet->flags & SILC_PACKET_FLAG_LIST)
1976 silc_server_new_id_list(server, sock, packet);
1978 silc_server_new_id(server, sock, packet);
1981 case SILC_PACKET_NEW_CLIENT:
1983 * Received new client packet. This includes client information that
1984 * we will use to create initial client ID. After creating new
1985 * ID we will send it to the client.
1987 SILC_LOG_DEBUG(("New Client packet"));
1988 if (packet->flags & SILC_PACKET_FLAG_LIST)
1990 silc_server_new_client(server, sock, packet);
1993 case SILC_PACKET_NEW_SERVER:
1995 * Received new server packet. This includes Server ID and some other
1996 * information that we may save. This is received after server has
1999 SILC_LOG_DEBUG(("New Server packet"));
2000 if (packet->flags & SILC_PACKET_FLAG_LIST)
2002 silc_server_new_server(server, sock, packet);
2005 case SILC_PACKET_NEW_CHANNEL:
2007 * Received new channel packet. Information about new channel in the
2008 * network are distributed using this packet.
2010 SILC_LOG_DEBUG(("New Channel packet"));
2011 if (packet->flags & SILC_PACKET_FLAG_LIST)
2012 silc_server_new_channel_list(server, sock, packet);
2014 silc_server_new_channel(server, sock, packet);
2017 case SILC_PACKET_HEARTBEAT:
2019 * Received heartbeat.
2021 SILC_LOG_DEBUG(("Heartbeat packet"));
2022 if (packet->flags & SILC_PACKET_FLAG_LIST)
2026 case SILC_PACKET_KEY_AGREEMENT:
2028 * Received heartbeat.
2030 SILC_LOG_DEBUG(("Key agreement packet"));
2031 if (packet->flags & SILC_PACKET_FLAG_LIST)
2033 silc_server_key_agreement(server, sock, packet);
2036 case SILC_PACKET_REKEY:
2038 * Received re-key packet. The sender wants to regenerate the session
2041 SILC_LOG_DEBUG(("Re-key packet"));
2042 if (packet->flags & SILC_PACKET_FLAG_LIST)
2044 silc_server_rekey(server, sock, packet);
2047 case SILC_PACKET_REKEY_DONE:
2049 * The re-key is done.
2051 SILC_LOG_DEBUG(("Re-key done packet"));
2052 if (packet->flags & SILC_PACKET_FLAG_LIST)
2055 if (sock->protocol && sock->protocol->protocol &&
2056 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2058 SilcServerRekeyInternalContext *proto_ctx =
2059 (SilcServerRekeyInternalContext *)sock->protocol->context;
2061 if (proto_ctx->packet)
2062 silc_packet_context_free(proto_ctx->packet);
2064 proto_ctx->packet = silc_packet_context_dup(packet);
2066 /* Let the protocol handle the packet */
2067 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
2069 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2070 "protocol active, packet dropped."));
2075 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2081 /* Creates connection to a remote router. */
2083 void silc_server_create_connection(SilcServer server,
2084 char *remote_host, uint32 port)
2086 SilcServerConnection sconn;
2088 /* Allocate connection object for hold connection specific stuff. */
2089 sconn = silc_calloc(1, sizeof(*sconn));
2090 sconn->server = server;
2091 sconn->remote_host = strdup(remote_host);
2092 sconn->remote_port = port;
2094 silc_task_register(server->timeout_queue, 0,
2095 silc_server_connect_router,
2096 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2097 SILC_TASK_PRI_NORMAL);
2100 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2102 silc_socket_free((SilcSocketConnection)context);
2105 /* Closes connection to socket connection */
2107 void silc_server_close_connection(SilcServer server,
2108 SilcSocketConnection sock)
2110 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2112 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2113 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2114 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2115 "Router"), sock->sock));
2117 /* If any protocol is active cancel its execution */
2118 if (sock->protocol) {
2119 silc_protocol_cancel(sock->protocol, server->timeout_queue);
2120 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2121 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2122 sock->protocol = NULL;
2125 /* We won't listen for this connection anymore */
2126 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2128 /* Unregister all tasks */
2129 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2130 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2132 /* Close the actual connection */
2133 silc_net_close_connection(sock->sock);
2134 server->sockets[sock->sock] = NULL;
2136 silc_task_register(server->timeout_queue, 0,
2137 silc_server_close_connection_final,
2138 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2139 SILC_TASK_PRI_NORMAL);
2142 /* Sends disconnect message to remote connection and disconnects the
2145 void silc_server_disconnect_remote(SilcServer server,
2146 SilcSocketConnection sock,
2147 const char *fmt, ...)
2150 unsigned char buf[4096];
2155 memset(buf, 0, sizeof(buf));
2157 vsprintf(buf, fmt, ap);
2160 SILC_LOG_DEBUG(("Disconnecting remote host"));
2162 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2164 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2165 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2166 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2169 /* Notify remote end that the conversation is over. The notify message
2170 is tried to be sent immediately. */
2171 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2172 buf, strlen(buf), TRUE);
2174 /* Mark the connection to be disconnected */
2175 SILC_SET_DISCONNECTED(sock);
2176 silc_server_close_connection(server, sock);
2181 SilcClientEntry client;
2182 } *FreeClientInternal;
2184 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2186 FreeClientInternal i = (FreeClientInternal)context;
2188 silc_idlist_del_data(i->client);
2189 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2193 /* Frees client data and notifies about client's signoff. */
2195 void silc_server_free_client_data(SilcServer server,
2196 SilcSocketConnection sock,
2197 SilcClientEntry client,
2201 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2203 /* If there is pending outgoing data for the client then purge it
2204 to the network before removing the client entry. */
2205 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2206 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2207 server->stat.packets_sent++;
2209 if (sock->outbuf->data - sock->outbuf->head)
2210 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2212 silc_packet_send(sock, TRUE);
2214 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2215 SILC_UNSET_OUTBUF_PENDING(sock);
2216 silc_buffer_clear(sock->outbuf);
2219 /* Send SIGNOFF notify to routers. */
2220 if (notify && !server->standalone && server->router)
2221 silc_server_send_notify_signoff(server, server->router->connection,
2222 server->server_type == SILC_SERVER ?
2223 FALSE : TRUE, client->id, signoff);
2225 /* Remove client from all channels */
2227 silc_server_remove_from_channels(server, NULL, client,
2228 TRUE, signoff, TRUE);
2230 silc_server_remove_from_channels(server, NULL, client,
2231 FALSE, NULL, FALSE);
2233 /* We will not delete the client entry right away. We will take it
2234 into history (for WHOWAS command) for 5 minutes */
2237 silc_task_register(server->timeout_queue, 0,
2238 silc_server_free_client_data_timeout,
2240 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2241 client->data.registered = FALSE;
2243 /* Free the client entry and everything in it */
2244 server->stat.my_clients--;
2245 server->stat.clients--;
2246 if (server->server_type == SILC_ROUTER)
2247 server->stat.cell_clients--;
2250 /* Frees user_data pointer from socket connection object. This also sends
2251 appropriate notify packets to the network to inform about leaving
2254 void silc_server_free_sock_user_data(SilcServer server,
2255 SilcSocketConnection sock)
2257 SILC_LOG_DEBUG(("Start"));
2259 switch(sock->type) {
2260 case SILC_SOCKET_TYPE_CLIENT:
2262 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2263 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2266 case SILC_SOCKET_TYPE_SERVER:
2267 case SILC_SOCKET_TYPE_ROUTER:
2269 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2271 /* Free all client entries that this server owns as they will
2272 become invalid now as well. */
2274 silc_server_remove_clients_by_server(server, user_data, TRUE);
2276 /* If this was our primary router connection then we're lost to
2277 the outside world. */
2278 if (server->router == user_data) {
2279 server->id_entry->router = NULL;
2280 server->router = NULL;
2281 server->standalone = TRUE;
2284 /* Free the server entry */
2285 silc_idlist_del_data(user_data);
2286 silc_idlist_del_server(server->local_list, user_data);
2287 server->stat.my_servers--;
2288 server->stat.servers--;
2289 if (server->server_type == SILC_ROUTER)
2290 server->stat.cell_servers--;
2295 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2297 silc_idlist_del_data(user_data);
2298 silc_free(user_data);
2303 sock->user_data = NULL;
2306 /* This function is used to remove all client entries by the server `entry'.
2307 This is called when the connection is lost to the server. In this case
2308 we must invalidate all the client entries owned by the server `entry'.
2309 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2310 distributed to our local clients. */
2312 int silc_server_remove_clients_by_server(SilcServer server,
2313 SilcServerEntry entry,
2316 SilcIDCacheList list = NULL;
2317 SilcIDCacheEntry id_cache = NULL;
2318 SilcClientEntry client = NULL;
2320 SilcClientEntry *clients = NULL;
2321 uint32 clients_c = 0;
2322 unsigned char **argv = NULL;
2323 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2324 SilcHashTable channels;
2325 SilcChannelClientEntry chl;
2326 SilcChannelEntry channel;
2327 SilcHashTableList htl;
2330 SILC_LOG_DEBUG(("Start"));
2332 /* Allocate the hash table that holds the channels that require
2333 channel key re-generation after we've removed this server's clients
2334 from the channels. */
2335 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2338 if (server_signoff) {
2339 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2340 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2341 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2342 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2343 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2344 memcpy(argv[argc], idp->data, idp->len);
2345 argv_lens[argc] = idp->len;
2346 argv_types[argc] = argc + 1;
2348 silc_buffer_free(idp);
2351 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2353 if (silc_idcache_list_first(list, &id_cache)) {
2355 client = (SilcClientEntry)id_cache->context;
2356 if (client->data.registered == FALSE) {
2357 if (!silc_idcache_list_next(list, &id_cache))
2363 if (client->router != entry) {
2364 if (server_signoff && client->connection) {
2365 clients = silc_realloc(clients,
2366 sizeof(*clients) * (clients_c + 1));
2367 clients[clients_c] = client;
2371 if (!silc_idcache_list_next(list, &id_cache))
2377 if (server_signoff) {
2378 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2379 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2380 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2382 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2384 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2385 memcpy(argv[argc], idp->data, idp->len);
2386 argv_lens[argc] = idp->len;
2387 argv_types[argc] = argc + 1;
2389 silc_buffer_free(idp);
2392 silc_hash_table_list(client->channels, &htl);
2393 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2394 if (silc_hash_table_find(channels, chl->channel, NULL, NULL))
2396 silc_hash_table_add(channels, chl->channel, chl->channel);
2399 /* Remove the client entry */
2400 silc_server_remove_from_channels(server, NULL, client, FALSE,
2402 silc_idlist_del_client(server->local_list, client);
2404 if (!silc_idcache_list_next(list, &id_cache))
2408 silc_idcache_list_free(list);
2411 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2413 if (silc_idcache_list_first(list, &id_cache)) {
2415 client = (SilcClientEntry)id_cache->context;
2416 if (client->data.registered == FALSE) {
2417 if (!silc_idcache_list_next(list, &id_cache))
2423 if (client->router != entry) {
2424 if (server_signoff && client->connection) {
2425 clients = silc_realloc(clients,
2426 sizeof(*clients) * (clients_c + 1));
2427 clients[clients_c] = client;
2431 if (!silc_idcache_list_next(list, &id_cache))
2437 if (server_signoff) {
2438 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2439 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2440 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2442 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2444 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2445 memcpy(argv[argc], idp->data, idp->len);
2446 argv_lens[argc] = idp->len;
2447 argv_types[argc] = argc + 1;
2449 silc_buffer_free(idp);
2452 silc_hash_table_list(client->channels, &htl);
2453 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2454 if (silc_hash_table_find(channels, chl->channel, NULL, NULL))
2456 silc_hash_table_add(channels, chl->channel, chl->channel);
2459 /* Remove the client entry */
2460 silc_server_remove_from_channels(server, NULL, client, FALSE,
2462 silc_idlist_del_client(server->global_list, client);
2464 if (!silc_idcache_list_next(list, &id_cache))
2468 silc_idcache_list_free(list);
2471 /* Send the SERVER_SIGNOFF notify */
2472 if (server_signoff) {
2475 /* Send SERVER_SIGNOFF notify to our primary router */
2476 if (!server->standalone && server->router &&
2477 server->router != entry) {
2478 args = silc_argument_payload_encode(1, argv, argv_lens,
2480 silc_server_send_notify_args(server,
2481 server->router->connection,
2482 server->server_type == SILC_SERVER ?
2484 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2486 silc_buffer_free(args);
2489 args = silc_argument_payload_encode(argc, argv, argv_lens,
2491 /* Send to local clients */
2492 for (i = 0; i < clients_c; i++) {
2493 silc_server_send_notify_args(server, clients[i]->connection,
2494 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2499 silc_buffer_free(args);
2500 for (i = 0; i < argc; i++)
2503 silc_free(argv_lens);
2504 silc_free(argv_types);
2507 /* We must now re-generate the channel key for all channels that had
2508 this server's client(s) on the channel. As they left the channel we
2509 must re-generate the channel key. */
2510 silc_hash_table_list(channels, &htl);
2511 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2512 silc_server_create_channel_key(server, channel, 0);
2513 silc_server_send_channel_key(server, NULL, channel,
2514 server->server_type == SILC_ROUTER ?
2515 FALSE : !server->standalone);
2517 silc_hash_table_free(channels);
2522 /* Checks whether given channel has global users. If it does this returns
2523 TRUE and FALSE if there is only locally connected clients on the channel. */
2525 int silc_server_channel_has_global(SilcChannelEntry channel)
2527 SilcChannelClientEntry chl;
2528 SilcHashTableList htl;
2530 silc_hash_table_list(channel->user_list, &htl);
2531 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2532 if (chl->client->router)
2539 /* Checks whether given channel has locally connected users. If it does this
2540 returns TRUE and FALSE if there is not one locally connected client. */
2542 int silc_server_channel_has_local(SilcChannelEntry channel)
2544 SilcChannelClientEntry chl;
2545 SilcHashTableList htl;
2547 silc_hash_table_list(channel->user_list, &htl);
2548 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2549 if (!chl->client->router)
2556 /* Removes client from all channels it has joined. This is used when client
2557 connection is disconnected. If the client on a channel is last, the
2558 channel is removed as well. This sends the SIGNOFF notify types. */
2560 void silc_server_remove_from_channels(SilcServer server,
2561 SilcSocketConnection sock,
2562 SilcClientEntry client,
2564 char *signoff_message,
2567 SilcChannelEntry channel;
2568 SilcChannelClientEntry chl;
2569 SilcHashTableList htl;
2572 SILC_LOG_DEBUG(("Start"));
2574 if (!client || !client->id)
2577 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2579 /* Remove the client from all channels. The client is removed from
2580 the channels' user list. */
2581 silc_hash_table_list(client->channels, &htl);
2582 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2583 channel = chl->channel;
2585 /* Remove channel from client's channel list */
2586 silc_hash_table_del(client->channels, channel);
2588 /* Remove channel if there is no users anymore */
2589 if (server->server_type == SILC_ROUTER &&
2590 silc_hash_table_count(channel->user_list) < 2) {
2592 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2593 if (!silc_idlist_del_channel(server->local_list, channel))
2594 silc_idlist_del_channel(server->global_list, channel);
2595 server->stat.my_channels--;
2599 /* Remove client from channel's client list */
2600 silc_hash_table_del(channel->user_list, chl->client);
2602 server->stat.my_chanclients--;
2604 /* If there is no global users on the channel anymore mark the channel
2605 as local channel. Do not check if the removed client is local client. */
2606 if (server->server_type == SILC_SERVER && channel->global_users &&
2607 chl->client->router && !silc_server_channel_has_global(channel))
2608 channel->global_users = FALSE;
2610 /* If there is not at least one local user on the channel then we don't
2611 need the channel entry anymore, we can remove it safely. */
2612 if (server->server_type == SILC_SERVER &&
2613 !silc_server_channel_has_local(channel)) {
2614 /* Notify about leaving client if this channel has global users. */
2615 if (notify && channel->global_users)
2616 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2617 SILC_NOTIFY_TYPE_SIGNOFF,
2618 signoff_message ? 2 : 1,
2619 clidp->data, clidp->len,
2620 signoff_message, signoff_message ?
2621 strlen(signoff_message) : 0);
2624 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2626 if (channel->founder_key) {
2627 /* The founder auth data exists, do not remove the channel entry */
2628 SilcChannelClientEntry chl2;
2629 SilcHashTableList htl2;
2633 silc_hash_table_list(channel->user_list, &htl2);
2634 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2635 silc_hash_table_del(chl2->client->channels, channel);
2636 silc_hash_table_del(channel->user_list, chl2->client);
2642 /* Remove the channel entry */
2643 if (!silc_idlist_del_channel(server->local_list, channel))
2644 silc_idlist_del_channel(server->global_list, channel);
2645 server->stat.my_channels--;
2649 /* Send notify to channel about client leaving SILC and thus
2650 the entire channel. */
2652 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2653 SILC_NOTIFY_TYPE_SIGNOFF,
2654 signoff_message ? 2 : 1,
2655 clidp->data, clidp->len,
2656 signoff_message, signoff_message ?
2657 strlen(signoff_message) : 0);
2659 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2660 /* Re-generate channel key */
2661 silc_server_create_channel_key(server, channel, 0);
2663 /* Send the channel key to the channel. The key of course is not sent
2664 to the client who was removed from the channel. */
2665 silc_server_send_channel_key(server, client->connection, channel,
2666 server->server_type == SILC_ROUTER ?
2667 FALSE : !server->standalone);
2671 silc_buffer_free(clidp);
2674 /* Removes client from one channel. This is used for example when client
2675 calls LEAVE command to remove itself from the channel. Returns TRUE
2676 if channel still exists and FALSE if the channel is removed when
2677 last client leaves the channel. If `notify' is FALSE notify messages
2680 int silc_server_remove_from_one_channel(SilcServer server,
2681 SilcSocketConnection sock,
2682 SilcChannelEntry channel,
2683 SilcClientEntry client,
2686 SilcChannelClientEntry chl;
2689 SILC_LOG_DEBUG(("Start"));
2691 /* Get the entry to the channel, if this client is not on the channel
2693 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2696 /* Remove the client from the channel. The client is removed from
2697 the channel's user list. */
2699 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2701 /* Remove channel from client's channel list */
2702 silc_hash_table_del(client->channels, chl->channel);
2704 /* Remove channel if there is no users anymore */
2705 if (server->server_type == SILC_ROUTER &&
2706 silc_hash_table_count(channel->user_list) < 2) {
2708 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2709 if (!silc_idlist_del_channel(server->local_list, channel))
2710 silc_idlist_del_channel(server->global_list, channel);
2711 silc_buffer_free(clidp);
2712 server->stat.my_channels--;
2716 /* Remove client from channel's client list */
2717 silc_hash_table_del(channel->user_list, chl->client);
2719 server->stat.my_chanclients--;
2721 /* If there is no global users on the channel anymore mark the channel
2722 as local channel. Do not check if the client is local client. */
2723 if (server->server_type == SILC_SERVER && channel->global_users &&
2724 chl->client->router && !silc_server_channel_has_global(channel))
2725 channel->global_users = FALSE;
2727 /* If there is not at least one local user on the channel then we don't
2728 need the channel entry anymore, we can remove it safely. */
2729 if (server->server_type == SILC_SERVER &&
2730 !silc_server_channel_has_local(channel)) {
2731 /* Notify about leaving client if this channel has global users. */
2732 if (notify && channel->global_users)
2733 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2734 SILC_NOTIFY_TYPE_LEAVE, 1,
2735 clidp->data, clidp->len);
2737 silc_buffer_free(clidp);
2740 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2742 if (channel->founder_key) {
2743 /* The founder auth data exists, do not remove the channel entry */
2744 SilcChannelClientEntry chl2;
2745 SilcHashTableList htl2;
2749 silc_hash_table_list(channel->user_list, &htl2);
2750 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2751 silc_hash_table_del(chl2->client->channels, channel);
2752 silc_hash_table_del(channel->user_list, chl2->client);
2758 /* Remove the channel entry */
2759 if (!silc_idlist_del_channel(server->local_list, channel))
2760 silc_idlist_del_channel(server->global_list, channel);
2761 server->stat.my_channels--;
2765 /* Send notify to channel about client leaving the channel */
2767 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2768 SILC_NOTIFY_TYPE_LEAVE, 1,
2769 clidp->data, clidp->len);
2771 silc_buffer_free(clidp);
2775 /* Returns TRUE if the given client is on the channel. FALSE if not.
2776 This works because we assure that the user list on the channel is
2777 always in up to date thus we can only check the channel list from
2778 `client' which is faster than checking the user list from `channel'. */
2780 int silc_server_client_on_channel(SilcClientEntry client,
2781 SilcChannelEntry channel)
2783 if (!client || !channel)
2786 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2792 /* Timeout callback. This is called if connection is idle or for some
2793 other reason is not responding within some period of time. This
2794 disconnects the remote end. */
2796 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2798 SilcServer server = (SilcServer)context;
2799 SilcSocketConnection sock = server->sockets[fd];
2801 SILC_LOG_DEBUG(("Start"));
2806 /* If we have protocol active we must assure that we call the protocol's
2807 final callback so that all the memory is freed. */
2808 if (sock->protocol) {
2809 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2810 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2814 if (sock->user_data)
2815 silc_server_free_sock_user_data(server, sock);
2817 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2818 "Connection timeout");
2821 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2822 function may be used only by router. In real SILC network all channels
2823 are created by routers thus this function is never used by normal
2826 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2827 SilcServerID *router_id,
2833 SilcChannelID *channel_id;
2834 SilcChannelEntry entry;
2838 SILC_LOG_DEBUG(("Creating new channel"));
2841 cipher = "aes-256-cbc";
2843 hmac = "hmac-sha1-96";
2845 /* Allocate cipher */
2846 if (!silc_cipher_alloc(cipher, &key))
2850 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2851 silc_cipher_free(key);
2855 channel_name = strdup(channel_name);
2857 /* Create the channel */
2858 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2859 entry = silc_idlist_add_channel(server->local_list, channel_name,
2860 SILC_CHANNEL_MODE_NONE, channel_id,
2861 NULL, key, newhmac);
2863 silc_free(channel_name);
2864 silc_cipher_free(key);
2865 silc_hmac_free(newhmac);
2869 entry->cipher = strdup(cipher);
2870 entry->hmac_name = strdup(hmac);
2872 /* Now create the actual key material */
2873 silc_server_create_channel_key(server, entry,
2874 silc_cipher_get_key_len(key) / 8);
2876 /* Notify other routers about the new channel. We send the packet
2877 to our primary route. */
2878 if (broadcast && server->standalone == FALSE)
2879 silc_server_send_new_channel(server, server->router->connection, TRUE,
2880 channel_name, entry->id,
2881 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2884 server->stat.my_channels++;
2889 /* Same as above but creates the channel with Channel ID `channel_id. */
2892 silc_server_create_new_channel_with_id(SilcServer server,
2896 SilcChannelID *channel_id,
2899 SilcChannelEntry entry;
2903 SILC_LOG_DEBUG(("Creating new channel"));
2906 cipher = "aes-256-cbc";
2908 hmac = "hmac-sha1-96";
2910 /* Allocate cipher */
2911 if (!silc_cipher_alloc(cipher, &key))
2915 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2916 silc_cipher_free(key);
2920 channel_name = strdup(channel_name);
2922 /* Create the channel */
2923 entry = silc_idlist_add_channel(server->local_list, channel_name,
2924 SILC_CHANNEL_MODE_NONE, channel_id,
2925 NULL, key, newhmac);
2927 silc_free(channel_name);
2931 /* Now create the actual key material */
2932 silc_server_create_channel_key(server, entry,
2933 silc_cipher_get_key_len(key) / 8);
2935 /* Notify other routers about the new channel. We send the packet
2936 to our primary route. */
2937 if (broadcast && server->standalone == FALSE)
2938 silc_server_send_new_channel(server, server->router->connection, TRUE,
2939 channel_name, entry->id,
2940 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2943 server->stat.my_channels++;
2948 /* Channel's key re-key timeout callback. */
2950 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2952 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2953 SilcServer server = (SilcServer)rekey->context;
2955 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2956 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2958 silc_task_register(server->timeout_queue, 0,
2959 silc_server_channel_key_rekey,
2960 (void *)rekey, 3600, 0,
2962 SILC_TASK_PRI_NORMAL);
2965 /* Generates new channel key. This is used to create the initial channel key
2966 but also to re-generate new key for channel. If `key_len' is provided
2967 it is the bytes of the key length. */
2969 void silc_server_create_channel_key(SilcServer server,
2970 SilcChannelEntry channel,
2974 unsigned char channel_key[32], hash[32];
2977 SILC_LOG_DEBUG(("Generating channel key"));
2979 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2980 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2984 if (!channel->channel_key)
2985 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2990 else if (channel->key_len)
2991 len = channel->key_len / 8;
2993 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2995 /* Create channel key */
2996 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2999 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3001 /* Remove old key if exists */
3003 memset(channel->key, 0, channel->key_len / 8);
3004 silc_free(channel->key);
3008 channel->key_len = len * 8;
3009 channel->key = silc_calloc(len, sizeof(*channel->key));
3010 memcpy(channel->key, channel_key, len);
3011 memset(channel_key, 0, sizeof(channel_key));
3013 /* Generate HMAC key from the channel key data and set it */
3015 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3016 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
3017 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3018 memset(hash, 0, sizeof(hash));
3020 if (server->server_type == SILC_ROUTER) {
3021 if (!channel->rekey)
3022 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3023 channel->rekey->context = (void *)server;
3024 channel->rekey->channel = channel;
3025 channel->rekey->key_len = key_len;
3027 silc_task_unregister_by_callback(server->timeout_queue,
3028 silc_server_channel_key_rekey);
3029 silc_task_register(server->timeout_queue, 0,
3030 silc_server_channel_key_rekey,
3031 (void *)channel->rekey, 3600, 0,
3033 SILC_TASK_PRI_NORMAL);
3037 /* Saves the channel key found in the encoded `key_payload' buffer. This
3038 function is used when we receive Channel Key Payload and also when we're
3039 processing JOIN command reply. Returns entry to the channel. */
3041 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3042 SilcBuffer key_payload,
3043 SilcChannelEntry channel)
3045 SilcChannelKeyPayload payload = NULL;
3046 SilcChannelID *id = NULL;
3047 unsigned char *tmp, hash[32];
3051 SILC_LOG_DEBUG(("Start"));
3053 /* Decode channel key payload */
3054 payload = silc_channel_key_payload_parse(key_payload);
3056 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3061 /* Get the channel entry */
3064 /* Get channel ID */
3065 tmp = silc_channel_key_get_id(payload, &tmp_len);
3066 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3072 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3074 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3076 SILC_LOG_ERROR(("Received key for non-existent channel"));
3082 tmp = silc_channel_key_get_key(payload, &tmp_len);
3088 cipher = silc_channel_key_get_cipher(payload, NULL);
3094 /* Remove old key if exists */
3096 memset(channel->key, 0, channel->key_len / 8);
3097 silc_free(channel->key);
3098 silc_cipher_free(channel->channel_key);
3101 /* Create new cipher */
3102 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3107 if (channel->cipher)
3108 silc_free(channel->cipher);
3109 channel->cipher = strdup(cipher);
3112 channel->key_len = tmp_len * 8;
3113 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3114 memcpy(channel->key, tmp, tmp_len);
3115 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3117 /* Generate HMAC key from the channel key data and set it */
3119 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3120 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3121 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3123 memset(hash, 0, sizeof(hash));
3124 memset(tmp, 0, tmp_len);
3126 if (server->server_type == SILC_ROUTER) {
3127 if (!channel->rekey)
3128 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3129 channel->rekey->context = (void *)server;
3130 channel->rekey->channel = channel;
3132 silc_task_unregister_by_callback(server->timeout_queue,
3133 silc_server_channel_key_rekey);
3134 silc_task_register(server->timeout_queue, 0,
3135 silc_server_channel_key_rekey,
3136 (void *)channel->rekey, 3600, 0,
3138 SILC_TASK_PRI_NORMAL);
3145 silc_channel_key_payload_free(payload);
3150 /* Heartbeat callback. This function is set as argument for the
3151 silc_socket_set_heartbeat function. The library will call this function
3152 at the set time interval. */
3154 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3157 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3159 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3162 /* Send the heartbeat */
3163 silc_server_send_heartbeat(hb->server, sock);
3166 /* Returns assembled of all servers in the given ID list. The packet's
3167 form is dictated by the New ID payload. */
3169 static void silc_server_announce_get_servers(SilcServer server,
3171 SilcBuffer *servers)
3173 SilcIDCacheList list;
3174 SilcIDCacheEntry id_cache;
3175 SilcServerEntry entry;
3178 /* Go through all clients in the list */
3179 if (silc_idcache_get_all(id_list->servers, &list)) {
3180 if (silc_idcache_list_first(list, &id_cache)) {
3182 entry = (SilcServerEntry)id_cache->context;
3184 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3186 *servers = silc_buffer_realloc(*servers,
3188 (*servers)->truelen + idp->len :
3190 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3191 silc_buffer_put(*servers, idp->data, idp->len);
3192 silc_buffer_pull(*servers, idp->len);
3193 silc_buffer_free(idp);
3195 if (!silc_idcache_list_next(list, &id_cache))
3200 silc_idcache_list_free(list);
3204 /* This function is used by router to announce existing servers to our
3205 primary router when we've connected to it. */
3207 void silc_server_announce_servers(SilcServer server)
3209 SilcBuffer servers = NULL;
3211 SILC_LOG_DEBUG(("Announcing servers"));
3213 /* Get servers in local list */
3214 silc_server_announce_get_servers(server, server->local_list, &servers);
3216 /* Get servers in global list */
3217 silc_server_announce_get_servers(server, server->global_list, &servers);
3220 silc_buffer_push(servers, servers->data - servers->head);
3221 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3223 /* Send the packet */
3224 silc_server_packet_send(server, server->router->connection,
3225 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3226 servers->data, servers->len, TRUE);
3228 silc_buffer_free(servers);
3232 /* Returns assembled packet of all clients in the given ID list. The
3233 packet's form is dictated by the New ID Payload. */
3235 static void silc_server_announce_get_clients(SilcServer server,
3237 SilcBuffer *clients)
3239 SilcIDCacheList list;
3240 SilcIDCacheEntry id_cache;
3241 SilcClientEntry client;
3244 /* Go through all clients in the list */
3245 if (silc_idcache_get_all(id_list->clients, &list)) {
3246 if (silc_idcache_list_first(list, &id_cache)) {
3248 client = (SilcClientEntry)id_cache->context;
3250 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3252 *clients = silc_buffer_realloc(*clients,
3254 (*clients)->truelen + idp->len :
3256 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3257 silc_buffer_put(*clients, idp->data, idp->len);
3258 silc_buffer_pull(*clients, idp->len);
3259 silc_buffer_free(idp);
3261 if (!silc_idcache_list_next(list, &id_cache))
3266 silc_idcache_list_free(list);
3270 /* This function is used to announce our existing clients to our router
3271 when we've connected to it. */
3273 void silc_server_announce_clients(SilcServer server)
3275 SilcBuffer clients = NULL;
3277 SILC_LOG_DEBUG(("Announcing clients"));
3279 /* Get clients in local list */
3280 silc_server_announce_get_clients(server, server->local_list,
3283 /* As router we announce our global list as well */
3284 if (server->server_type == SILC_ROUTER)
3285 silc_server_announce_get_clients(server, server->global_list,
3289 silc_buffer_push(clients, clients->data - clients->head);
3290 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3292 /* Send the packet */
3293 silc_server_packet_send(server, server->router->connection,
3294 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3295 clients->data, clients->len, TRUE);
3297 silc_buffer_free(clients);
3302 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3308 p = silc_notify_payload_encode(notify, argc, ap);
3314 /* Returns assembled packets for channel users of the `channel'. */
3316 void silc_server_announce_get_channel_users(SilcServer server,
3317 SilcChannelEntry channel,
3318 SilcBuffer *channel_users,
3319 SilcBuffer *channel_users_modes)
3321 SilcChannelClientEntry chl;
3322 SilcHashTableList htl;
3323 SilcBuffer chidp, clidp;
3326 unsigned char mode[4];
3328 SILC_LOG_DEBUG(("Start"));
3330 /* Now find all users on the channel */
3331 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3332 silc_hash_table_list(channel->user_list, &htl);
3333 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3334 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3337 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3338 clidp->data, clidp->len,
3339 chidp->data, chidp->len);
3342 silc_buffer_realloc(*channel_users,
3344 (*channel_users)->truelen + len : len));
3345 silc_buffer_pull_tail(*channel_users,
3346 ((*channel_users)->end -
3347 (*channel_users)->data));
3349 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3350 silc_buffer_pull(*channel_users, len);
3351 silc_buffer_free(tmp);
3353 /* CUMODE notify for mode change on the channel */
3354 SILC_PUT32_MSB(chl->mode, mode);
3355 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3356 3, clidp->data, clidp->len,
3358 clidp->data, clidp->len);
3360 *channel_users_modes =
3361 silc_buffer_realloc(*channel_users_modes,
3362 (*channel_users_modes ?
3363 (*channel_users_modes)->truelen + len : len));
3364 silc_buffer_pull_tail(*channel_users_modes,
3365 ((*channel_users_modes)->end -
3366 (*channel_users_modes)->data));
3368 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3369 silc_buffer_pull(*channel_users_modes, len);
3370 silc_buffer_free(tmp);
3372 silc_buffer_free(clidp);
3374 silc_buffer_free(chidp);
3377 /* Returns assembled packets for all channels and users on those channels
3378 from the given ID List. The packets are in the form dictated by the
3379 New Channel and New Channel User payloads. */
3381 void silc_server_announce_get_channels(SilcServer server,
3383 SilcBuffer *channels,
3384 SilcBuffer *channel_users,
3385 SilcBuffer **channel_users_modes,
3386 uint32 *channel_users_modes_c,
3387 SilcChannelID ***channel_ids)
3389 SilcIDCacheList list;
3390 SilcIDCacheEntry id_cache;
3391 SilcChannelEntry channel;
3396 int i = *channel_users_modes_c;
3398 SILC_LOG_DEBUG(("Start"));
3400 /* Go through all channels in the list */
3401 if (silc_idcache_get_all(id_list->channels, &list)) {
3402 if (silc_idcache_list_first(list, &id_cache)) {
3404 channel = (SilcChannelEntry)id_cache->context;
3406 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3407 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3408 name_len = strlen(channel->channel_name);
3410 len = 4 + name_len + id_len + 4;
3412 silc_buffer_realloc(*channels,
3413 (*channels ? (*channels)->truelen + len : len));
3414 silc_buffer_pull_tail(*channels,
3415 ((*channels)->end - (*channels)->data));
3416 silc_buffer_format(*channels,
3417 SILC_STR_UI_SHORT(name_len),
3418 SILC_STR_UI_XNSTRING(channel->channel_name,
3420 SILC_STR_UI_SHORT(id_len),
3421 SILC_STR_UI_XNSTRING(cid, id_len),
3422 SILC_STR_UI_INT(channel->mode),
3424 silc_buffer_pull(*channels, len);
3426 *channel_users_modes = silc_realloc(*channel_users_modes,
3427 sizeof(**channel_users_modes) *
3429 (*channel_users_modes)[i] = NULL;
3430 *channel_ids = silc_realloc(*channel_ids,
3431 sizeof(**channel_ids) * (i + 1));
3432 (*channel_ids)[i] = NULL;
3433 silc_server_announce_get_channel_users(server, channel,
3435 channel_users_modes[i]);
3436 (*channel_ids)[i] = channel->id;
3439 if (!silc_idcache_list_next(list, &id_cache))
3443 *channel_users_modes_c += i;
3446 silc_idcache_list_free(list);
3450 /* This function is used to announce our existing channels to our router
3451 when we've connected to it. This also announces the users on the
3452 channels to the router. */
3454 void silc_server_announce_channels(SilcServer server)
3456 SilcBuffer channels = NULL, channel_users = NULL;
3457 SilcBuffer *channel_users_modes = NULL;
3458 uint32 channel_users_modes_c = 0;
3459 SilcChannelID **channel_ids = NULL;
3461 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3463 /* Get channels and channel users in local list */
3464 silc_server_announce_get_channels(server, server->local_list,
3465 &channels, &channel_users,
3466 &channel_users_modes,
3467 &channel_users_modes_c,
3470 /* Get channels and channel users in global list */
3471 silc_server_announce_get_channels(server, server->global_list,
3472 &channels, &channel_users,
3473 &channel_users_modes,
3474 &channel_users_modes_c,
3478 silc_buffer_push(channels, channels->data - channels->head);
3479 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3481 /* Send the packet */
3482 silc_server_packet_send(server, server->router->connection,
3483 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3484 channels->data, channels->len,
3487 silc_buffer_free(channels);
3490 if (channel_users) {
3491 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3492 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3493 channel_users->len);
3495 /* Send the packet */
3496 silc_server_packet_send(server, server->router->connection,
3497 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3498 channel_users->data, channel_users->len,
3501 silc_buffer_free(channel_users);
3504 if (channel_users_modes) {
3507 for (i = 0; i < channel_users_modes_c; i++) {
3508 silc_buffer_push(channel_users_modes[i],
3509 channel_users_modes[i]->data -
3510 channel_users_modes[i]->head);
3511 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3512 channel_users_modes[i]->len);
3513 silc_server_packet_send_dest(server, server->router->connection,
3514 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3515 channel_ids[i], SILC_ID_CHANNEL,
3516 channel_users_modes[i]->data,
3517 channel_users_modes[i]->len,
3519 silc_buffer_free(channel_users_modes[i]);
3521 silc_free(channel_users_modes);
3522 silc_free(channel_ids);
3526 /* Failure timeout callback. If this is called then we will immediately
3527 process the received failure. We always process the failure with timeout
3528 since we do not want to blindly trust to received failure packets.
3529 This won't be called (the timeout is cancelled) if the failure was
3530 bogus (it is bogus if remote does not close the connection after sending
3533 SILC_TASK_CALLBACK(silc_server_failure_callback)
3535 SilcServerFailureContext f = (SilcServerFailureContext)context;
3537 if (f->sock->protocol) {
3538 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3539 silc_protocol_execute(f->sock->protocol, f->server->timeout_queue, 0, 0);
3545 /* Assembles user list and users mode list from the `channel'. */
3547 void silc_server_get_users_on_channel(SilcServer server,
3548 SilcChannelEntry channel,
3549 SilcBuffer *user_list,
3550 SilcBuffer *mode_list,
3553 SilcChannelClientEntry chl;
3554 SilcHashTableList htl;
3555 SilcBuffer client_id_list;
3556 SilcBuffer client_mode_list;
3558 uint32 list_count = 0, len = 0;
3560 silc_hash_table_list(channel->user_list, &htl);
3561 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3562 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3564 client_id_list = silc_buffer_alloc(len);
3566 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3567 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3568 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3570 silc_hash_table_list(channel->user_list, &htl);
3571 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3573 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3574 silc_buffer_put(client_id_list, idp->data, idp->len);
3575 silc_buffer_pull(client_id_list, idp->len);
3576 silc_buffer_free(idp);
3578 /* Client's mode on channel */
3579 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3580 silc_buffer_pull(client_mode_list, 4);
3584 silc_buffer_push(client_id_list,
3585 client_id_list->data - client_id_list->head);
3586 silc_buffer_push(client_mode_list,
3587 client_mode_list->data - client_mode_list->head);
3589 *user_list = client_id_list;
3590 *mode_list = client_mode_list;
3591 *user_count = list_count;
3594 /* Saves users and their modes to the `channel'. */
3596 void silc_server_save_users_on_channel(SilcServer server,
3597 SilcSocketConnection sock,
3598 SilcChannelEntry channel,
3599 SilcClientID *noadd,
3600 SilcBuffer user_list,
3601 SilcBuffer mode_list,
3606 /* Cache the received Client ID's and modes. This cache expires
3607 whenever server sends notify message to channel. It means two things;
3608 some user has joined or leaved the channel. XXX TODO! */
3609 for (i = 0; i < user_count; i++) {
3612 SilcClientID *client_id;
3613 SilcClientEntry client;
3616 SILC_GET16_MSB(idp_len, user_list->data + 2);
3618 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3619 silc_buffer_pull(user_list, idp_len);
3624 SILC_GET32_MSB(mode, mode_list->data);
3625 silc_buffer_pull(mode_list, 4);
3627 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3628 silc_free(client_id);
3632 /* Check if we have this client cached already. */
3633 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3636 client = silc_idlist_find_client_by_id(server->global_list,
3639 /* If router did not find such Client ID in its lists then this must
3640 be bogus client or some router in the net is buggy. */
3641 if (server->server_type == SILC_ROUTER) {
3642 silc_free(client_id);
3646 /* We don't have that client anywhere, add it. The client is added
3647 to global list since server didn't have it in the lists so it must be
3649 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3650 silc_id_dup(client_id, SILC_ID_CLIENT),
3651 sock->user_data, NULL);
3653 silc_free(client_id);
3657 client->data.registered = TRUE;
3660 silc_free(client_id);
3662 if (!silc_server_client_on_channel(client, channel)) {
3663 /* Client was not on the channel, add it. */
3664 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3665 chl->client = client;
3667 chl->channel = channel;
3668 silc_hash_table_add(channel->user_list, chl->client, chl);
3669 silc_hash_table_add(client->channels, chl->channel, chl);
3674 /* Lookups route to the client indicated by the `id_data'. The connection
3675 object and internal data object is returned. Returns NULL if route
3676 could not be found to the client. If the `client_id' is specified then
3677 it is used and the `id_data' is ignored. */
3679 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3680 unsigned char *id_data,
3682 SilcClientID *client_id,
3683 SilcIDListData *idata)
3686 SilcClientEntry client;
3688 SILC_LOG_DEBUG(("Start"));
3690 /* Decode destination Client ID */
3692 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3694 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3698 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3701 /* If the destination belongs to our server we don't have to route
3702 the packet anywhere but to send it to the local destination. */
3703 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3707 if (client->data.registered == FALSE)
3710 /* If we are router and the client has router then the client is in
3711 our cell but not directly connected to us. */
3712 if (server->server_type == SILC_ROUTER && client->router) {
3713 /* We are of course in this case the client's router thus the route
3714 to the client is the server who owns the client. So, we will send
3715 the packet to that server. */
3717 *idata = (SilcIDListData)client->router;
3718 return client->router->connection;
3721 /* Seems that client really is directly connected to us */
3723 *idata = (SilcIDListData)client;
3724 return client->connection;
3727 /* Destination belongs to someone not in this server. If we are normal
3728 server our action is to send the packet to our router. */
3729 if (server->server_type == SILC_SERVER && !server->standalone) {
3732 *idata = (SilcIDListData)server->router;
3733 return server->router->connection;
3736 /* We are router and we will perform route lookup for the destination
3737 and send the packet to fastest route. */
3738 if (server->server_type == SILC_ROUTER && !server->standalone) {
3739 /* Check first that the ID is valid */
3740 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3742 SilcSocketConnection dst_sock;
3744 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3748 *idata = (SilcIDListData)dst_sock->user_data;
3757 /* Encodes and returns channel list of channels the `client' has joined.
3758 Secret channels are not put to the list. */
3760 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3761 SilcClientEntry client)
3763 SilcBuffer buffer = NULL;
3764 SilcChannelEntry channel;
3765 SilcChannelClientEntry chl;
3766 SilcHashTableList htl;
3772 silc_hash_table_list(client->channels, &htl);
3773 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3774 channel = chl->channel;
3776 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3779 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3780 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3781 name_len = strlen(channel->channel_name);
3783 len = 4 + name_len + id_len + 4;
3784 buffer = silc_buffer_realloc(buffer,
3785 (buffer ? (buffer)->truelen + len : len));
3786 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3787 silc_buffer_format(buffer,
3788 SILC_STR_UI_SHORT(name_len),
3789 SILC_STR_UI_XNSTRING(channel->channel_name,
3791 SILC_STR_UI_SHORT(id_len),
3792 SILC_STR_UI_XNSTRING(cid, id_len),
3793 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3795 silc_buffer_pull(buffer, len);
3800 silc_buffer_push(buffer, buffer->data - buffer->head);
3805 /* Finds client entry by Client ID and if it is not found then resolves
3806 it using WHOIS command. */
3808 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3809 SilcClientID *client_id)
3811 SilcClientEntry client;
3813 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3815 client = silc_idlist_find_client_by_id(server->global_list,
3817 if (!client && server->server_type == SILC_ROUTER)
3821 if (!client && server->standalone)
3824 if (!client || !client->nickname || !client->username) {
3825 SilcBuffer buffer, idp;
3827 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3828 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3829 ++server->cmd_ident, 1,
3830 3, idp->data, idp->len);
3831 silc_server_packet_send(server, client ? client->router->connection :
3832 server->router->connection,
3833 SILC_PACKET_COMMAND, 0,
3834 buffer->data, buffer->len, FALSE);
3835 silc_buffer_free(idp);
3836 silc_buffer_free(buffer);
3842 /* A timeout callback for the re-key. We will be the initiator of the
3845 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3847 SilcSocketConnection sock = (SilcSocketConnection)context;
3848 SilcIDListData idata = (SilcIDListData)sock->user_data;
3849 SilcServer server = (SilcServer)idata->rekey->context;
3850 SilcProtocol protocol;
3851 SilcServerRekeyInternalContext *proto_ctx;
3853 SILC_LOG_DEBUG(("Start"));
3855 /* Allocate internal protocol context. This is sent as context
3857 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3858 proto_ctx->server = (void *)server;
3859 proto_ctx->sock = sock;
3860 proto_ctx->responder = FALSE;
3861 proto_ctx->pfs = idata->rekey->pfs;
3863 /* Perform rekey protocol. Will call the final callback after the
3864 protocol is over. */
3865 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3866 &protocol, proto_ctx, silc_server_rekey_final);
3867 sock->protocol = protocol;
3869 /* Run the protocol */
3870 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
3872 /* Re-register re-key timeout */
3873 silc_task_register(server->timeout_queue, sock->sock,
3874 silc_server_rekey_callback,
3875 context, idata->rekey->timeout, 0,
3876 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3879 /* The final callback for the REKEY protocol. This will actually take the
3880 new key material into use. */
3882 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3884 SilcProtocol protocol = (SilcProtocol)context;
3885 SilcServerRekeyInternalContext *ctx =
3886 (SilcServerRekeyInternalContext *)protocol->context;
3887 SilcServer server = (SilcServer)ctx->server;
3888 SilcSocketConnection sock = ctx->sock;
3890 SILC_LOG_DEBUG(("Start"));
3892 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3893 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3894 /* Error occured during protocol */
3895 silc_protocol_cancel(protocol, server->timeout_queue);
3896 silc_protocol_free(protocol);
3897 sock->protocol = NULL;
3899 silc_packet_context_free(ctx->packet);
3901 silc_ske_free(ctx->ske);
3907 silc_protocol_free(protocol);
3908 sock->protocol = NULL;
3910 silc_packet_context_free(ctx->packet);
3912 silc_ske_free(ctx->ske);