5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 if (!silc_server_config_register_ciphers(server->config))
149 silc_cipher_register_default();
150 if (!silc_server_config_register_pkcs(server->config))
151 silc_pkcs_register_default();
152 if (!silc_server_config_register_hashfuncs(server->config))
153 silc_hash_register_default();
154 if (!silc_server_config_register_hmacs(server->config))
155 silc_hmac_register_default();
157 /* Initialize random number generator for the server. */
158 server->rng = silc_rng_alloc();
159 silc_rng_init(server->rng);
160 silc_rng_global_init(server->rng);
162 /* Initialize hash functions for server to use */
163 silc_hash_alloc("md5", &server->md5hash);
164 silc_hash_alloc("sha1", &server->sha1hash);
166 /* Initialize none cipher */
167 silc_cipher_alloc("none", &server->none_cipher);
169 /* Create a listening server. Note that our server can listen on
170 multiple ports. All listeners are created here and now. */
171 /* XXX Still check this whether to use server_info or listen_port. */
173 while(server->config->listen_port) {
176 tmp = silc_net_create_server(server->config->listen_port->port,
177 server->config->listen_port->host);
181 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
182 sock[sock_count] = tmp;
183 server->config->listen_port = server->config->listen_port->next;
187 /* Initialize ID caches */
188 server->local_list->clients =
189 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
190 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
191 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
193 /* These are allocated for normal server as well as these hold some
194 global information that the server has fetched from its router. For
195 router these are used as they are supposed to be used on router. */
196 server->global_list->clients =
197 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
198 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
199 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
201 /* Allocate the entire socket list that is used in server. Eventually
202 all connections will have entry in this table (it is a table of
203 pointers to the actual object that is allocated individually
205 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
206 sizeof(*server->sockets));
208 for (i = 0; i < sock_count; i++) {
209 SilcSocketConnection newsocket = NULL;
211 /* Set socket to non-blocking mode */
212 silc_net_set_socket_nonblock(sock[i]);
213 server->sock = sock[i];
215 /* Create a Server ID for the server. */
216 silc_id_create_server_id(sock[i], server->rng, &id);
222 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
223 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
224 server->id_type = SILC_ID_SERVER;
225 server->server_name = server->config->server_info->server_name;
227 /* Add ourselves to the server list. We don't have a router yet
228 beacuse we haven't established a route yet. It will be done later.
229 For now, NULL is sent as router. This allocates new entry to
232 silc_idlist_add_server(server->local_list,
233 server->config->server_info->server_name,
234 server->server_type, server->id, NULL, NULL);
236 SILC_LOG_ERROR(("Could not add ourselves to cache"));
240 /* Add ourselves also to the socket table. The entry allocated above
241 is sent as argument for fast referencing in the future. */
242 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
245 server->sockets[sock[i]] = newsocket;
247 /* Perform name and address lookups to resolve the listenning address
249 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
251 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
253 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
254 newsocket->hostname ? newsocket->hostname :
255 newsocket->ip ? newsocket->ip : ""));
256 server->stat.conn_failures++;
259 if (!newsocket->hostname)
260 newsocket->hostname = strdup(newsocket->ip);
262 newsocket->port = silc_net_get_local_port(sock[i]);
264 /* Put the allocated socket pointer also to the entry allocated above
265 for fast back-referencing to the socket list. */
266 id_entry->connection = (void *)server->sockets[sock[i]];
267 server->id_entry = id_entry;
270 /* Register protocols */
271 silc_server_protocols_register();
273 /* Initialize the scheduler. This will register the task queues as well.
274 In SILC we have by default three task queues. One task queue for
275 non-timeout tasks which perform different kind of I/O on file
276 descriptors, timeout task queue for timeout tasks, and, generic
277 non-timeout task queue whose tasks apply to all connections. */
278 server->schedule = silc_schedule_init(&server->io_queue,
279 &server->timeout_queue,
280 &server->generic_queue,
281 SILC_SERVER_MAX_CONNECTIONS);
282 if (!server->schedule)
285 /* Add the first task to the queue. This is task that is executed by
286 timeout. It expires as soon as the caller calls silc_server_run. This
287 task performs authentication protocol and key exchange with our
289 silc_task_register(server->timeout_queue, sock[0],
290 silc_server_connect_to_router,
291 (void *)server, 0, 1,
293 SILC_TASK_PRI_NORMAL);
295 /* Add listener task to the queue. This task receives new connections to the
296 server. This task remains on the queue until the end of the program. */
297 silc_task_register(server->io_queue, sock[0],
298 silc_server_accept_new_connection,
299 (void *)server, 0, 0,
301 SILC_TASK_PRI_NORMAL);
302 server->listenning = TRUE;
304 /* If server connections has been configured then we must be router as
305 normal server cannot have server connections, only router connections. */
306 if (server->config->servers)
307 server->server_type = SILC_ROUTER;
309 /* Register the ID Cache purge task. This periodically purges the ID cache
310 and removes the expired cache entries. */
312 /* Clients local list */
313 purge = silc_calloc(1, sizeof(*purge));
314 purge->cache = server->local_list->clients;
315 purge->timeout_queue = server->timeout_queue;
316 silc_task_register(purge->timeout_queue, 0,
318 (void *)purge, 600, 0,
319 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
321 /* Clients global list */
322 purge = silc_calloc(1, sizeof(*purge));
323 purge->cache = server->global_list->clients;
324 purge->timeout_queue = server->timeout_queue;
325 silc_task_register(purge->timeout_queue, 0,
327 (void *)purge, 300, 0,
328 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
330 SILC_LOG_DEBUG(("Server initialized"));
332 /* We are done here, return succesfully */
336 for (i = 0; i < sock_count; i++)
337 silc_net_close_server(sock[i]);
342 /* Fork server to background and set gid+uid to non-root.
343 Silcd will not run as root, so trying to set either user or group to
344 root will cause silcd to exit. */
346 void silc_server_daemonise(SilcServer server)
348 /* Are we executing silcd as root or a regular user? */
355 if (!server->config->identity || !server->config->identity->user ||
356 !server->config->identity->group) {
357 fprintf(stderr, "Error:"
358 "\tSILC server must not be run as root. For the security of your\n"
359 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
360 "\tuser account. Modify the [Identity] configuration section to run\n"
361 "\tthe server as non-root user.\n");
365 /* Get the values given for user and group in configuration file */
366 user=server->config->identity->user;
367 group=server->config->identity->group;
369 /* Check whether the user/group information is text */
370 if (atoi(user)!=0 || atoi(group)!=0) {
371 SILC_LOG_DEBUG(("Invalid user and/or group information"));
372 SILC_LOG_DEBUG(("User and/or group given as number"));
373 fprintf(stderr, "Invalid user and/or group information\n");
374 fprintf(stderr, "Please assign them as names, not numbers\n");
378 /* Catch the nasty incident of string "0" returning 0 from atoi */
379 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
380 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
381 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
389 fprintf(stderr, "No such user %s found\n", user);
394 fprintf(stderr, "No such group %s found\n", group);
398 /* Check whether user and/or group is set to root. If yes, exit
399 immediately. Otherwise, setgid and setuid server to user.group */
400 if (gr->gr_gid==0 || pw->pw_uid==0) {
401 fprintf(stderr, "Error:"
402 "\tSILC server must not be run as root. For the security of your\n"
403 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
404 "\tuser account. Modify the [Identity] configuration section to run\n"
405 "\tthe server as non-root user.\n");
408 /* Fork server to background, making it a daemon */
410 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
411 SILC_LOG_DEBUG(("Forking SILC server to background"));
416 SILC_LOG_DEBUG(("Changing to group %s", group));
417 if(setgid(gr->gr_gid)==0) {
418 SILC_LOG_DEBUG(("Setgid to %s", group));
420 SILC_LOG_DEBUG(("Setgid to %s failed", group));
421 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
425 SILC_LOG_DEBUG(("Changing to user nobody"));
426 if(setuid(pw->pw_uid)==0) {
427 SILC_LOG_DEBUG(("Setuid to %s", user));
429 SILC_LOG_DEBUG(("Setuid to %s failed", user));
430 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
436 /* Fork server to background, making it a daemon */
438 SILC_LOG_DEBUG(("Server started as user"));
439 SILC_LOG_DEBUG(("Forking SILC server to background"));
446 /* Stops the SILC server. This function is used to shutdown the server.
447 This is usually called after the scheduler has returned. After stopping
448 the server one should call silc_server_free. */
450 void silc_server_stop(SilcServer server)
452 SILC_LOG_DEBUG(("Stopping server"));
454 /* Stop the scheduler, although it might be already stopped. This
455 doesn't hurt anyone. This removes all the tasks and task queues,
457 silc_schedule_stop(server->schedule);
458 silc_schedule_uninit(server->schedule);
460 silc_server_protocols_unregister();
462 SILC_LOG_DEBUG(("Server stopped"));
465 /* The heart of the server. This runs the scheduler thus runs the server.
466 When this returns the server has been stopped and the program will
469 void silc_server_run(SilcServer server)
471 SILC_LOG_DEBUG(("Running server"));
473 SILC_LOG_INFO(("SILC Server started"));
475 /* Start the scheduler, the heart of the SILC server. When this returns
476 the program will be terminated. */
477 silc_schedule(server->schedule);
480 /* Timeout callback that will be called to retry connecting to remote
481 router. This is used by both normal and router server. This will wait
482 before retrying the connecting. The timeout is generated by exponential
483 backoff algorithm. */
485 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
487 SilcServerConnection sconn = (SilcServerConnection)context;
488 SilcServer server = sconn->server;
490 SILC_LOG_INFO(("Retrying connecting to a router"));
492 /* Calculate next timeout */
493 if (sconn->retry_count >= 1) {
494 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
495 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
496 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
498 sconn->retry_timeout = server->params->retry_interval_min;
500 sconn->retry_count++;
501 sconn->retry_timeout = sconn->retry_timeout +
502 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
504 /* If we've reached max retry count, give up. */
505 if (sconn->retry_count > server->params->retry_count &&
506 server->params->retry_keep_trying == FALSE) {
507 SILC_LOG_ERROR(("Could not connect to router, giving up"));
511 /* Wait one before retrying */
512 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
513 context, sconn->retry_timeout,
514 server->params->retry_interval_min_usec,
515 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
518 /* Generic routine to use connect to a router. */
520 SILC_TASK_CALLBACK(silc_server_connect_router)
522 SilcServerConnection sconn = (SilcServerConnection)context;
523 SilcServer server = sconn->server;
524 SilcSocketConnection newsocket;
525 SilcProtocol protocol;
526 SilcServerKEInternalContext *proto_ctx;
529 SILC_LOG_INFO(("Connecting to the router %s on port %d",
530 sconn->remote_host, sconn->remote_port));
532 /* Connect to remote host */
533 sock = silc_net_create_connection(sconn->remote_port,
536 SILC_LOG_ERROR(("Could not connect to router"));
537 silc_task_register(server->timeout_queue, fd,
538 silc_server_connect_to_router_retry,
539 context, 0, 1, SILC_TASK_TIMEOUT,
540 SILC_TASK_PRI_NORMAL);
544 /* Set socket options */
545 silc_net_set_socket_nonblock(sock);
546 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
548 /* Create socket connection for the connection. Even though we
549 know that we are connecting to a router we will mark the socket
550 to be unknown connection until we have executed authentication
552 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
553 server->sockets[sock] = newsocket;
554 newsocket->hostname = strdup(sconn->remote_host);
555 newsocket->ip = strdup(sconn->remote_host);
556 newsocket->port = sconn->remote_port;
557 sconn->sock = newsocket;
559 /* Allocate internal protocol context. This is sent as context
561 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
562 proto_ctx->server = (void *)server;
563 proto_ctx->context = (void *)sconn;
564 proto_ctx->sock = newsocket;
565 proto_ctx->rng = server->rng;
566 proto_ctx->responder = FALSE;
568 /* Perform key exchange protocol. silc_server_connect_to_router_second
569 will be called after the protocol is finished. */
570 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
571 &protocol, proto_ctx,
572 silc_server_connect_to_router_second);
573 newsocket->protocol = protocol;
575 /* Register a timeout task that will be executed if the protocol
576 is not executed within set limit. */
577 proto_ctx->timeout_task =
578 silc_task_register(server->timeout_queue, sock,
579 silc_server_timeout_remote,
580 server, server->params->protocol_timeout,
581 server->params->protocol_timeout_usec,
585 /* Register the connection for network input and output. This sets
586 that scheduler will listen for incoming packets for this connection
587 and sets that outgoing packets may be sent to this connection as
588 well. However, this doesn't set the scheduler for outgoing traffic,
589 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
590 later when outgoing data is available. */
591 context = (void *)server;
592 SILC_REGISTER_CONNECTION_FOR_IO(sock);
594 /* Run the protocol */
595 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
598 /* This function connects to our primary router or if we are a router this
599 establishes all our primary routes. This is called at the start of the
600 server to do authentication and key exchange with our router - called
603 SILC_TASK_CALLBACK(silc_server_connect_to_router)
605 SilcServer server = (SilcServer)context;
606 SilcServerConnection sconn;
608 SILC_LOG_DEBUG(("Connecting to router(s)"));
610 /* If we are normal SILC server we need to connect to our cell's
612 if (server->server_type == SILC_SERVER) {
613 SILC_LOG_DEBUG(("We are normal server"));
615 /* Create connection to the router, if configured. */
616 if (server->config->routers) {
618 /* Allocate connection object for hold connection specific stuff. */
619 sconn = silc_calloc(1, sizeof(*sconn));
620 sconn->server = server;
621 sconn->remote_host = strdup(server->config->routers->host);
622 sconn->remote_port = server->config->routers->port;
624 silc_task_register(server->timeout_queue, fd,
625 silc_server_connect_router,
626 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
627 SILC_TASK_PRI_NORMAL);
632 /* If we are a SILC router we need to establish all of our primary
634 if (server->server_type == SILC_ROUTER) {
635 SilcServerConfigSectionServerConnection *ptr;
637 SILC_LOG_DEBUG(("We are router"));
639 /* Create the connections to all our routes */
640 ptr = server->config->routers;
643 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
644 ptr->initiator ? "Initiator" : "Responder",
645 ptr->host, ptr->port));
647 if (ptr->initiator) {
648 /* Allocate connection object for hold connection specific stuff. */
649 sconn = silc_calloc(1, sizeof(*sconn));
650 sconn->server = server;
651 sconn->remote_host = strdup(ptr->host);
652 sconn->remote_port = ptr->port;
654 silc_task_register(server->timeout_queue, fd,
655 silc_server_connect_router,
656 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
657 SILC_TASK_PRI_NORMAL);
667 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
669 /* There wasn't a configured router, we will continue but we don't
670 have a connection to outside world. We will be standalone server. */
671 server->standalone = TRUE;
674 /* Second part of connecting to router(s). Key exchange protocol has been
675 executed and now we will execute authentication protocol. */
677 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
679 SilcProtocol protocol = (SilcProtocol)context;
680 SilcServerKEInternalContext *ctx =
681 (SilcServerKEInternalContext *)protocol->context;
682 SilcServer server = (SilcServer)ctx->server;
683 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
684 SilcSocketConnection sock = ctx->sock;
685 SilcServerConnAuthInternalContext *proto_ctx;
686 SilcServerConfigSectionServerConnection *conn = NULL;
688 SILC_LOG_DEBUG(("Start"));
690 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
691 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
692 /* Error occured during protocol */
693 silc_protocol_free(protocol);
694 sock->protocol = NULL;
695 silc_ske_free_key_material(ctx->keymat);
697 silc_packet_context_free(ctx->packet);
699 silc_ske_free(ctx->ske);
701 silc_free(ctx->dest_id);
703 silc_task_unregister_by_callback(server->timeout_queue,
704 silc_server_failure_callback);
705 silc_server_disconnect_remote(server, sock, "Server closed connection: "
706 "Key exchange failed");
710 /* We now have the key material as the result of the key exchange
711 protocol. Take the key material into use. Free the raw key material
712 as soon as we've set them into use. */
713 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
714 ctx->ske->prop->cipher,
715 ctx->ske->prop->pkcs,
716 ctx->ske->prop->hash,
717 ctx->ske->prop->hmac,
718 ctx->ske->prop->group,
720 silc_protocol_free(protocol);
721 sock->protocol = NULL;
722 silc_ske_free_key_material(ctx->keymat);
724 silc_packet_context_free(ctx->packet);
726 silc_ske_free(ctx->ske);
728 silc_free(ctx->dest_id);
730 silc_task_unregister_by_callback(server->timeout_queue,
731 silc_server_failure_callback);
732 silc_server_disconnect_remote(server, sock, "Server closed connection: "
733 "Key exchange failed");
736 silc_ske_free_key_material(ctx->keymat);
738 /* Allocate internal context for the authentication protocol. This
739 is sent as context for the protocol. */
740 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
741 proto_ctx->server = (void *)server;
742 proto_ctx->context = (void *)sconn;
743 proto_ctx->sock = sock;
744 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
745 proto_ctx->dest_id_type = ctx->dest_id_type;
746 proto_ctx->dest_id = ctx->dest_id;
748 /* Resolve the authentication method used in this connection. Check if
749 we find a match from user configured connections */
750 conn = silc_server_config_find_router_conn(server->config,
754 /* Match found. Use the configured authentication method */
755 proto_ctx->auth_meth = conn->auth_meth;
756 if (conn->auth_data) {
757 proto_ctx->auth_data = strdup(conn->auth_data);
758 proto_ctx->auth_data_len = strlen(conn->auth_data);
761 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
762 sock->hostname, sock->ip, sock->port));
763 silc_protocol_free(protocol);
764 sock->protocol = NULL;
766 silc_packet_context_free(ctx->packet);
768 silc_ske_free(ctx->ske);
770 silc_free(ctx->dest_id);
772 silc_task_unregister_by_callback(server->timeout_queue,
773 silc_server_failure_callback);
774 silc_server_disconnect_remote(server, sock, "Server closed connection: "
775 "Key exchange failed");
779 /* Free old protocol as it is finished now */
780 silc_protocol_free(protocol);
782 silc_packet_context_free(ctx->packet);
784 sock->protocol = NULL;
786 /* Allocate the authentication protocol. This is allocated here
787 but we won't start it yet. We will be receiving party of this
788 protocol thus we will wait that connecting party will make
790 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
791 &sock->protocol, proto_ctx,
792 silc_server_connect_to_router_final);
794 /* Register timeout task. If the protocol is not executed inside
795 this timelimit the connection will be terminated. Currently
796 this is 15 seconds and is hard coded limit (XXX). */
797 proto_ctx->timeout_task =
798 silc_task_register(server->timeout_queue, sock->sock,
799 silc_server_timeout_remote,
800 (void *)server, 15, 0,
804 /* Run the protocol */
805 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
808 /* Finalizes the connection to router. Registers a server task to the
809 queue so that we can accept new connections. */
811 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
813 SilcProtocol protocol = (SilcProtocol)context;
814 SilcServerConnAuthInternalContext *ctx =
815 (SilcServerConnAuthInternalContext *)protocol->context;
816 SilcServer server = (SilcServer)ctx->server;
817 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
818 SilcSocketConnection sock = ctx->sock;
819 SilcServerEntry id_entry;
821 SilcServerHBContext hb_context;
822 unsigned char *id_string;
824 SilcIDListData idata;
826 SILC_LOG_DEBUG(("Start"));
828 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
829 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
830 /* Error occured during protocol */
832 silc_free(ctx->dest_id);
833 silc_server_disconnect_remote(server, sock, "Server closed connection: "
834 "Authentication failed");
838 /* Add a task to the queue. This task receives new connections to the
839 server. This task remains on the queue until the end of the program. */
840 if (!server->listenning) {
841 silc_task_register(server->io_queue, server->sock,
842 silc_server_accept_new_connection,
843 (void *)server, 0, 0,
845 SILC_TASK_PRI_NORMAL);
846 server->listenning = TRUE;
849 /* Send NEW_SERVER packet to the router. We will become registered
850 to the SILC network after sending this packet. */
851 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
852 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
853 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
854 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
855 silc_buffer_format(packet,
856 SILC_STR_UI_SHORT(id_len),
857 SILC_STR_UI_XNSTRING(id_string, id_len),
858 SILC_STR_UI_SHORT(strlen(server->server_name)),
859 SILC_STR_UI_XNSTRING(server->server_name,
860 strlen(server->server_name)),
863 /* Send the packet */
864 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
865 packet->data, packet->len, TRUE);
866 silc_buffer_free(packet);
867 silc_free(id_string);
869 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
871 /* Add the connected router to local server list */
872 server->standalone = FALSE;
873 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
874 SILC_ROUTER, ctx->dest_id, NULL, sock);
877 silc_free(ctx->dest_id);
878 silc_server_disconnect_remote(server, sock, "Server closed connection: "
879 "Authentication failed");
883 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
884 silc_free(sock->user_data);
885 sock->user_data = (void *)id_entry;
886 sock->type = SILC_SOCKET_TYPE_ROUTER;
887 server->id_entry->router = id_entry;
888 server->router = id_entry;
889 idata = (SilcIDListData)sock->user_data;
890 idata->registered = TRUE;
892 /* Perform keepalive. The `hb_context' will be freed automatically
893 when finally calling the silc_socket_free function. XXX hardcoded
895 hb_context = silc_calloc(1, sizeof(*hb_context));
896 hb_context->server = server;
897 silc_socket_set_heartbeat(sock, 600, hb_context,
898 silc_server_perform_heartbeat,
899 server->timeout_queue);
901 /* Register re-key timeout */
902 idata->rekey->timeout = 3600; /* XXX hardcoded */
903 idata->rekey->context = (void *)server;
904 silc_task_register(server->timeout_queue, sock->sock,
905 silc_server_rekey_callback,
906 (void *)sock, idata->rekey->timeout, 0,
907 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
909 /* If we are router then announce our possible servers. */
910 if (server->server_type == SILC_ROUTER)
911 silc_server_announce_servers(server);
913 /* Announce our clients and channels to the router */
914 silc_server_announce_clients(server);
915 silc_server_announce_channels(server);
918 /* Free the temporary connection data context */
920 silc_free(sconn->remote_host);
924 /* Free the protocol object */
925 silc_protocol_free(protocol);
927 silc_packet_context_free(ctx->packet);
929 silc_ske_free(ctx->ske);
931 sock->protocol = NULL;
934 /* Accepts new connections to the server. Accepting new connections are
935 done in three parts to make it async. */
937 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
939 SilcServer server = (SilcServer)context;
940 SilcSocketConnection newsocket;
941 SilcServerKEInternalContext *proto_ctx;
943 void *cconfig, *sconfig, *rconfig;
944 SilcServerConfigSectionDenyConnection *deny;
946 SILC_LOG_DEBUG(("Accepting new connection"));
948 server->stat.conn_attempts++;
950 sock = silc_net_accept_connection(server->sock);
952 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
953 server->stat.conn_failures++;
957 /* Check max connections */
958 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
959 SILC_LOG_ERROR(("Refusing connection, server is full"));
960 server->stat.conn_failures++;
964 /* Set socket options */
965 silc_net_set_socket_nonblock(sock);
966 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
968 /* We don't create a ID yet, since we don't know what type of connection
969 this is yet. But, we do add the connection to the socket table. */
970 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
971 server->sockets[sock] = newsocket;
973 /* XXX This MUST be done async as this will block the entire server
974 process. Either we have to do our own resolver stuff or in the future
975 we can use threads. */
976 /* Perform name and address lookups for the remote host. */
977 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
979 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
981 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
982 newsocket->hostname ? newsocket->hostname :
983 newsocket->ip ? newsocket->ip : ""));
984 server->stat.conn_failures++;
987 if (!newsocket->hostname)
988 newsocket->hostname = strdup(newsocket->ip);
990 newsocket->port = silc_net_get_remote_port(sock);
992 /* Register the connection for network input and output. This sets
993 that scheduler will listen for incoming packets for this connection
994 and sets that outgoing packets may be sent to this connection as well.
995 However, this doesn't set the scheduler for outgoing traffic, it
996 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
997 later when outgoing data is available. */
998 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1000 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1003 port = server->sockets[fd]->port; /* Listenning port */
1005 /* Check whether this connection is denied to connect to us. */
1006 deny = silc_server_config_denied_conn(server->config, newsocket->ip, port);
1008 deny = silc_server_config_denied_conn(server->config, newsocket->hostname,
1011 /* The connection is denied */
1012 SILC_LOG_INFO(("Connection %s (%s) is denied",
1013 newsocket->hostname, newsocket->ip));
1014 silc_server_disconnect_remote(server, newsocket, deny->comment ?
1016 "Server closed connection: "
1017 "Connection refused");
1018 server->stat.conn_failures++;
1022 /* Check whether we have configred this sort of connection at all. We
1023 have to check all configurations since we don't know what type of
1024 connection this is. */
1025 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1026 newsocket->ip, port)))
1027 cconfig = silc_server_config_find_client_conn(server->config,
1028 newsocket->hostname,
1030 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1033 sconfig = silc_server_config_find_server_conn(server->config,
1034 newsocket->hostname,
1036 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1037 newsocket->ip, port)))
1038 rconfig = silc_server_config_find_router_conn(server->config,
1039 newsocket->hostname,
1041 if (!cconfig && !sconfig && !rconfig) {
1042 silc_server_disconnect_remote(server, newsocket,
1043 "Server closed connection: "
1044 "Connection refused");
1045 server->stat.conn_failures++;
1049 /* The connection is allowed */
1051 /* Allocate internal context for key exchange protocol. This is
1052 sent as context for the protocol. */
1053 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1054 proto_ctx->server = context;
1055 proto_ctx->sock = newsocket;
1056 proto_ctx->rng = server->rng;
1057 proto_ctx->responder = TRUE;
1058 proto_ctx->cconfig = cconfig;
1059 proto_ctx->sconfig = sconfig;
1060 proto_ctx->rconfig = rconfig;
1062 /* Prepare the connection for key exchange protocol. We allocate the
1063 protocol but will not start it yet. The connector will be the
1064 initiator of the protocol thus we will wait for initiation from
1065 there before we start the protocol. */
1066 server->stat.auth_attempts++;
1067 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1068 &newsocket->protocol, proto_ctx,
1069 silc_server_accept_new_connection_second);
1071 /* Register a timeout task that will be executed if the connector
1072 will not start the key exchange protocol within 60 seconds. For
1073 now, this is a hard coded limit. After 60 secs the connection will
1074 be closed if the key exchange protocol has not been started. */
1075 proto_ctx->timeout_task =
1076 silc_task_register(server->timeout_queue, newsocket->sock,
1077 silc_server_timeout_remote,
1083 /* Second part of accepting new connection. Key exchange protocol has been
1084 performed and now it is time to do little connection authentication
1085 protocol to figure out whether this connection is client or server
1086 and whether it has right to access this server (especially server
1087 connections needs to be authenticated). */
1089 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1091 SilcProtocol protocol = (SilcProtocol)context;
1092 SilcServerKEInternalContext *ctx =
1093 (SilcServerKEInternalContext *)protocol->context;
1094 SilcServer server = (SilcServer)ctx->server;
1095 SilcSocketConnection sock = ctx->sock;
1096 SilcServerConnAuthInternalContext *proto_ctx;
1098 SILC_LOG_DEBUG(("Start"));
1100 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1101 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1102 /* Error occured during protocol */
1103 silc_protocol_free(protocol);
1104 sock->protocol = NULL;
1105 silc_ske_free_key_material(ctx->keymat);
1107 silc_packet_context_free(ctx->packet);
1109 silc_ske_free(ctx->ske);
1111 silc_free(ctx->dest_id);
1113 silc_task_unregister_by_callback(server->timeout_queue,
1114 silc_server_failure_callback);
1115 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1116 "Key exchange failed");
1117 server->stat.auth_failures++;
1121 /* We now have the key material as the result of the key exchange
1122 protocol. Take the key material into use. Free the raw key material
1123 as soon as we've set them into use. */
1124 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1125 ctx->ske->prop->cipher,
1126 ctx->ske->prop->pkcs,
1127 ctx->ske->prop->hash,
1128 ctx->ske->prop->hmac,
1129 ctx->ske->prop->group,
1131 silc_protocol_free(protocol);
1132 sock->protocol = NULL;
1133 silc_ske_free_key_material(ctx->keymat);
1135 silc_packet_context_free(ctx->packet);
1137 silc_ske_free(ctx->ske);
1139 silc_free(ctx->dest_id);
1141 silc_task_unregister_by_callback(server->timeout_queue,
1142 silc_server_failure_callback);
1143 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1144 "Key exchange failed");
1145 server->stat.auth_failures++;
1148 silc_ske_free_key_material(ctx->keymat);
1150 /* Allocate internal context for the authentication protocol. This
1151 is sent as context for the protocol. */
1152 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1153 proto_ctx->server = (void *)server;
1154 proto_ctx->sock = sock;
1155 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1156 proto_ctx->responder = TRUE;
1157 proto_ctx->dest_id_type = ctx->dest_id_type;
1158 proto_ctx->dest_id = ctx->dest_id;
1159 proto_ctx->cconfig = ctx->cconfig;
1160 proto_ctx->sconfig = ctx->sconfig;
1161 proto_ctx->rconfig = ctx->rconfig;
1163 /* Free old protocol as it is finished now */
1164 silc_protocol_free(protocol);
1166 silc_packet_context_free(ctx->packet);
1168 sock->protocol = NULL;
1170 /* Allocate the authentication protocol. This is allocated here
1171 but we won't start it yet. We will be receiving party of this
1172 protocol thus we will wait that connecting party will make
1173 their first move. */
1174 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1175 &sock->protocol, proto_ctx,
1176 silc_server_accept_new_connection_final);
1178 /* Register timeout task. If the protocol is not executed inside
1179 this timelimit the connection will be terminated. Currently
1180 this is 60 seconds and is hard coded limit (XXX). */
1181 proto_ctx->timeout_task =
1182 silc_task_register(server->timeout_queue, sock->sock,
1183 silc_server_timeout_remote,
1184 (void *)server, 60, 0,
1189 /* Final part of accepting new connection. The connection has now
1190 been authenticated and keys has been exchanged. We also know whether
1191 this is client or server connection. */
1193 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1195 SilcProtocol protocol = (SilcProtocol)context;
1196 SilcServerConnAuthInternalContext *ctx =
1197 (SilcServerConnAuthInternalContext *)protocol->context;
1198 SilcServer server = (SilcServer)ctx->server;
1199 SilcSocketConnection sock = ctx->sock;
1200 SilcServerHBContext hb_context;
1201 void *id_entry = NULL;
1203 SILC_LOG_DEBUG(("Start"));
1205 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1206 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1207 /* Error occured during protocol */
1208 silc_protocol_free(protocol);
1209 sock->protocol = NULL;
1211 silc_packet_context_free(ctx->packet);
1213 silc_ske_free(ctx->ske);
1215 silc_free(ctx->dest_id);
1218 sock->protocol = NULL;
1219 silc_task_unregister_by_callback(server->timeout_queue,
1220 silc_server_failure_callback);
1221 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1222 "Authentication failed");
1223 server->stat.auth_failures++;
1227 switch(ctx->conn_type) {
1228 case SILC_SOCKET_TYPE_CLIENT:
1230 SilcClientEntry client;
1232 SILC_LOG_DEBUG(("Remote host is client"));
1233 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1236 /* Add the client to the client ID cache. The nickname and Client ID
1237 and other information is created after we have received NEW_CLIENT
1238 packet from client. */
1239 client = silc_idlist_add_client(server->local_list,
1240 NULL, NULL, NULL, NULL, NULL, sock);
1242 SILC_LOG_ERROR(("Could not add new client to cache"));
1243 silc_free(sock->user_data);
1244 silc_server_disconnect_remote(server, sock,
1245 "Server closed connection: "
1246 "Authentication failed");
1247 server->stat.auth_failures++;
1252 server->stat.my_clients++;
1253 server->stat.clients++;
1254 if (server->server_type == SILC_ROUTER)
1255 server->stat.cell_clients++;
1257 id_entry = (void *)client;
1260 case SILC_SOCKET_TYPE_SERVER:
1261 case SILC_SOCKET_TYPE_ROUTER:
1263 SilcServerEntry new_server;
1264 SilcServerConfigSectionServerConnection *conn =
1265 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1266 ctx->sconfig : ctx->rconfig;
1268 SILC_LOG_DEBUG(("Remote host is %s",
1269 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1270 "server" : "router"));
1271 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1272 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1273 "server" : "router"));
1275 /* Add the server into server cache. The server name and Server ID
1276 is updated after we have received NEW_SERVER packet from the
1277 server. We mark ourselves as router for this server if we really
1280 silc_idlist_add_server(server->local_list, NULL,
1281 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1282 SILC_SERVER : SILC_ROUTER, NULL,
1283 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1284 server->id_entry : NULL, sock);
1286 SILC_LOG_ERROR(("Could not add new server to cache"));
1287 silc_free(sock->user_data);
1288 silc_server_disconnect_remote(server, sock,
1289 "Server closed connection: "
1290 "Authentication failed");
1291 server->stat.auth_failures++;
1296 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1297 server->stat.my_servers++;
1299 server->stat.my_routers++;
1300 server->stat.servers++;
1302 id_entry = (void *)new_server;
1304 /* Check whether this connection is to be our primary router connection
1305 if we dont' already have the primary route. */
1306 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1307 if (silc_server_config_is_primary_route(server->config) &&
1311 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1312 server->standalone = FALSE;
1313 if (!server->id_entry->router) {
1314 server->id_entry->router = id_entry;
1315 server->router = id_entry;
1325 sock->type = ctx->conn_type;
1327 /* Add the common data structure to the ID entry. */
1329 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1331 /* Add to sockets internal pointer for fast referencing */
1332 silc_free(sock->user_data);
1333 sock->user_data = id_entry;
1335 /* Connection has been fully established now. Everything is ok. */
1336 SILC_LOG_DEBUG(("New connection authenticated"));
1338 /* Perform keepalive. The `hb_context' will be freed automatically
1339 when finally calling the silc_socket_free function. XXX hardcoded
1341 hb_context = silc_calloc(1, sizeof(*hb_context));
1342 hb_context->server = server;
1343 silc_socket_set_heartbeat(sock, 600, hb_context,
1344 silc_server_perform_heartbeat,
1345 server->timeout_queue);
1348 silc_task_unregister_by_callback(server->timeout_queue,
1349 silc_server_failure_callback);
1350 silc_protocol_free(protocol);
1352 silc_packet_context_free(ctx->packet);
1354 silc_ske_free(ctx->ske);
1356 silc_free(ctx->dest_id);
1358 sock->protocol = NULL;
1361 /* This function is used to read packets from network and send packets to
1362 network. This is usually a generic task. */
1364 SILC_TASK_CALLBACK(silc_server_packet_process)
1366 SilcServer server = (SilcServer)context;
1367 SilcSocketConnection sock = server->sockets[fd];
1368 SilcIDListData idata;
1369 SilcCipher cipher = NULL;
1370 SilcHmac hmac = NULL;
1376 SILC_LOG_DEBUG(("Processing packet"));
1378 /* Packet sending */
1380 if (type == SILC_TASK_WRITE) {
1381 /* Do not send data to disconnected connection */
1382 if (SILC_IS_DISCONNECTED(sock))
1385 server->stat.packets_sent++;
1387 if (sock->outbuf->data - sock->outbuf->head)
1388 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1390 /* Send the packet */
1391 ret = silc_packet_send(sock, TRUE);
1393 /* If returned -2 could not write to connection now, will do
1399 SILC_LOG_ERROR(("Error sending packet to connection "
1400 "%s:%d [%s]", sock->hostname, sock->port,
1401 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1402 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1403 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1408 /* The packet has been sent and now it is time to set the connection
1409 back to only for input. When there is again some outgoing data
1410 available for this connection it will be set for output as well.
1411 This call clears the output setting and sets it only for input. */
1412 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1413 SILC_UNSET_OUTBUF_PENDING(sock);
1415 silc_buffer_clear(sock->outbuf);
1419 /* Packet receiving */
1421 /* Read some data from connection */
1422 ret = silc_packet_receive(sock);
1426 SILC_LOG_ERROR(("Error receiving packet from connection "
1427 "%s:%d [%s]", sock->hostname, sock->port,
1428 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1429 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1430 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1437 SILC_LOG_DEBUG(("Read EOF"));
1439 /* If connection is disconnecting already we will finally
1440 close the connection */
1441 if (SILC_IS_DISCONNECTING(sock)) {
1442 if (sock->user_data)
1443 silc_server_free_sock_user_data(server, sock);
1444 silc_server_close_connection(server, sock);
1448 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1449 SILC_SET_DISCONNECTING(sock);
1451 /* If the closed connection was our primary router connection the
1452 start re-connecting phase. */
1453 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1454 sock == server->router->connection)
1455 silc_task_register(server->timeout_queue, 0,
1456 silc_server_connect_to_router,
1459 SILC_TASK_PRI_NORMAL);
1461 if (sock->user_data)
1462 silc_server_free_sock_user_data(server, sock);
1463 silc_server_close_connection(server, sock);
1467 /* If connection is disconnecting or disconnected we will ignore
1469 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1470 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1474 server->stat.packets_received++;
1476 /* Get keys and stuff from ID entry */
1477 idata = (SilcIDListData)sock->user_data;
1479 idata->last_receive = time(NULL);
1480 cipher = idata->receive_key;
1481 hmac = idata->hmac_receive;
1484 /* Process the packet. This will call the parser that will then
1485 decrypt and parse the packet. */
1486 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1490 /* Callback function that the silc_packet_decrypt will call to make the
1491 decision whether the packet is normal or special packet. We will
1492 return TRUE if it is normal and FALSE if it is special */
1494 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1496 SilcPacketContext *packet,
1499 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1500 SilcServer server = (SilcServer)parse_ctx->context;
1502 /* Packet is normal packet, if:
1504 1) packet is private message packet and does not have private key set
1505 2) is other packet than channel message packet
1506 3) is channel message packet and remote is router and we are router
1508 all other packets are special packets
1511 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1512 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1515 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1516 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1517 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1518 server->server_type == SILC_ROUTER))
1524 /* Parses whole packet, received earlier. */
1526 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1528 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1529 SilcServer server = (SilcServer)parse_ctx->context;
1530 SilcSocketConnection sock = parse_ctx->sock;
1531 SilcPacketContext *packet = parse_ctx->packet;
1532 SilcIDListData idata = (SilcIDListData)sock->user_data;
1535 SILC_LOG_DEBUG(("Start"));
1537 /* Decrypt the received packet */
1538 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1539 idata ? idata->hmac_receive : NULL,
1540 packet->buffer, packet,
1541 silc_server_packet_decrypt_check, parse_ctx);
1543 SILC_LOG_WARNING(("Packet decryption failed for connection "
1544 "%s:%d [%s]", sock->hostname, sock->port,
1545 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1546 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1547 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1553 /* Parse the packet. Packet type is returned. */
1554 ret = silc_packet_parse(packet);
1556 /* Parse the packet header in special way as this is "special"
1558 ret = silc_packet_parse_special(packet);
1561 if (ret == SILC_PACKET_NONE)
1564 /* Check that the the current client ID is same as in the client's packet. */
1565 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1566 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1567 if (client && client->id) {
1568 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1569 packet->src_id_type);
1570 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1578 if (server->server_type == SILC_ROUTER) {
1579 /* Route the packet if it is not destined to us. Other ID types but
1580 server are handled separately after processing them. */
1581 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1582 packet->dst_id_type == SILC_ID_SERVER &&
1583 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1584 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1586 /* Route the packet to fastest route for the destination ID */
1587 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1588 packet->dst_id_type);
1591 silc_server_packet_route(server,
1592 silc_server_route_get(server, id,
1593 packet->dst_id_type),
1600 /* Parse the incoming packet type */
1601 silc_server_packet_parse_type(server, sock, packet);
1603 if (server->server_type == SILC_ROUTER) {
1604 /* Broadcast packet if it is marked as broadcast packet and it is
1605 originated from router and we are router. */
1606 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1607 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1608 !server->standalone) {
1609 silc_server_packet_broadcast(server, server->router->connection, packet);
1614 /* silc_buffer_clear(sock->inbuf); */
1615 silc_packet_context_free(packet);
1616 silc_free(parse_ctx);
1619 /* Parser callback called by silc_packet_receive_process. This merely
1620 registers timeout that will handle the actual parsing when appropriate. */
1622 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1624 SilcServer server = (SilcServer)parser_context->context;
1625 SilcSocketConnection sock = parser_context->sock;
1627 switch (sock->type) {
1628 case SILC_SOCKET_TYPE_UNKNOWN:
1629 case SILC_SOCKET_TYPE_CLIENT:
1630 /* Parse the packet with timeout */
1631 silc_task_register(server->timeout_queue, sock->sock,
1632 silc_server_packet_parse_real,
1633 (void *)parser_context, 0, 100000,
1635 SILC_TASK_PRI_NORMAL);
1637 case SILC_SOCKET_TYPE_SERVER:
1638 case SILC_SOCKET_TYPE_ROUTER:
1639 /* Packets from servers are parsed as soon as possible */
1640 silc_task_register(server->timeout_queue, sock->sock,
1641 silc_server_packet_parse_real,
1642 (void *)parser_context, 0, 1,
1644 SILC_TASK_PRI_NORMAL);
1651 /* Parses the packet type and calls what ever routines the packet type
1652 requires. This is done for all incoming packets. */
1654 void silc_server_packet_parse_type(SilcServer server,
1655 SilcSocketConnection sock,
1656 SilcPacketContext *packet)
1658 SilcPacketType type = packet->type;
1660 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1662 /* Parse the packet type */
1664 case SILC_PACKET_DISCONNECT:
1665 SILC_LOG_DEBUG(("Disconnect packet"));
1666 if (packet->flags & SILC_PACKET_FLAG_LIST)
1670 case SILC_PACKET_SUCCESS:
1672 * Success received for something. For now we can have only
1673 * one protocol for connection executing at once hence this
1674 * success message is for whatever protocol is executing currently.
1676 SILC_LOG_DEBUG(("Success packet"));
1677 if (packet->flags & SILC_PACKET_FLAG_LIST)
1680 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1683 case SILC_PACKET_FAILURE:
1685 * Failure received for something. For now we can have only
1686 * one protocol for connection executing at once hence this
1687 * failure message is for whatever protocol is executing currently.
1689 SILC_LOG_DEBUG(("Failure packet"));
1690 if (packet->flags & SILC_PACKET_FLAG_LIST)
1692 if (sock->protocol) {
1693 SilcServerFailureContext f;
1694 f = silc_calloc(1, sizeof(*f));
1698 /* We will wait 5 seconds to process this failure packet */
1699 silc_task_register(server->timeout_queue, sock->sock,
1700 silc_server_failure_callback, (void *)f, 5, 0,
1701 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1705 case SILC_PACKET_REJECT:
1706 SILC_LOG_DEBUG(("Reject packet"));
1707 if (packet->flags & SILC_PACKET_FLAG_LIST)
1712 case SILC_PACKET_NOTIFY:
1714 * Received notify packet. Server can receive notify packets from
1715 * router. Server then relays the notify messages to clients if needed.
1717 SILC_LOG_DEBUG(("Notify packet"));
1718 if (packet->flags & SILC_PACKET_FLAG_LIST)
1719 silc_server_notify_list(server, sock, packet);
1721 silc_server_notify(server, sock, packet);
1727 case SILC_PACKET_CHANNEL_MESSAGE:
1729 * Received channel message. Channel messages are special packets
1730 * (although probably most common ones) thus they are handled
1733 SILC_LOG_DEBUG(("Channel Message packet"));
1734 if (packet->flags & SILC_PACKET_FLAG_LIST)
1736 silc_server_channel_message(server, sock, packet);
1739 case SILC_PACKET_CHANNEL_KEY:
1741 * Received key for channel. As channels are created by the router
1742 * the keys are as well. We will distribute the key to all of our
1743 * locally connected clients on the particular channel. Router
1744 * never receives this channel and thus is ignored.
1746 SILC_LOG_DEBUG(("Channel Key packet"));
1747 if (packet->flags & SILC_PACKET_FLAG_LIST)
1749 silc_server_channel_key(server, sock, packet);
1755 case SILC_PACKET_COMMAND:
1757 * Recived command. Processes the command request and allocates the
1758 * command context and calls the command.
1760 SILC_LOG_DEBUG(("Command packet"));
1761 if (packet->flags & SILC_PACKET_FLAG_LIST)
1763 silc_server_command_process(server, sock, packet);
1766 case SILC_PACKET_COMMAND_REPLY:
1768 * Received command reply packet. Received command reply to command. It
1769 * may be reply to command sent by us or reply to command sent by client
1770 * that we've routed further.
1772 SILC_LOG_DEBUG(("Command Reply packet"));
1773 if (packet->flags & SILC_PACKET_FLAG_LIST)
1775 silc_server_command_reply(server, sock, packet);
1779 * Private Message packets
1781 case SILC_PACKET_PRIVATE_MESSAGE:
1783 * Received private message packet. The packet is coming from either
1786 SILC_LOG_DEBUG(("Private Message packet"));
1787 if (packet->flags & SILC_PACKET_FLAG_LIST)
1789 silc_server_private_message(server, sock, packet);
1792 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1794 * Private message key packet.
1796 if (packet->flags & SILC_PACKET_FLAG_LIST)
1798 silc_server_private_message_key(server, sock, packet);
1802 * Key Exchange protocol packets
1804 case SILC_PACKET_KEY_EXCHANGE:
1805 SILC_LOG_DEBUG(("KE packet"));
1806 if (packet->flags & SILC_PACKET_FLAG_LIST)
1809 if (sock->protocol && sock->protocol->protocol &&
1810 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1812 SilcServerKEInternalContext *proto_ctx =
1813 (SilcServerKEInternalContext *)sock->protocol->context;
1815 proto_ctx->packet = silc_packet_context_dup(packet);
1817 /* Let the protocol handle the packet */
1818 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 100000);
1820 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1821 "protocol active, packet dropped."));
1825 case SILC_PACKET_KEY_EXCHANGE_1:
1826 SILC_LOG_DEBUG(("KE 1 packet"));
1827 if (packet->flags & SILC_PACKET_FLAG_LIST)
1830 if (sock->protocol && sock->protocol->protocol &&
1831 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1832 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1834 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1835 SilcServerRekeyInternalContext *proto_ctx =
1836 (SilcServerRekeyInternalContext *)sock->protocol->context;
1838 if (proto_ctx->packet)
1839 silc_packet_context_free(proto_ctx->packet);
1841 proto_ctx->packet = silc_packet_context_dup(packet);
1843 /* Let the protocol handle the packet */
1844 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1846 SilcServerKEInternalContext *proto_ctx =
1847 (SilcServerKEInternalContext *)sock->protocol->context;
1849 if (proto_ctx->packet)
1850 silc_packet_context_free(proto_ctx->packet);
1852 proto_ctx->packet = silc_packet_context_dup(packet);
1853 proto_ctx->dest_id_type = packet->src_id_type;
1854 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1855 packet->src_id_type);
1856 if (!proto_ctx->dest_id)
1859 /* Let the protocol handle the packet */
1860 silc_protocol_execute(sock->protocol, server->timeout_queue,
1864 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1865 "protocol active, packet dropped."));
1869 case SILC_PACKET_KEY_EXCHANGE_2:
1870 SILC_LOG_DEBUG(("KE 2 packet"));
1871 if (packet->flags & SILC_PACKET_FLAG_LIST)
1874 if (sock->protocol && sock->protocol->protocol &&
1875 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1876 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1878 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1879 SilcServerRekeyInternalContext *proto_ctx =
1880 (SilcServerRekeyInternalContext *)sock->protocol->context;
1882 if (proto_ctx->packet)
1883 silc_packet_context_free(proto_ctx->packet);
1885 proto_ctx->packet = silc_packet_context_dup(packet);
1887 /* Let the protocol handle the packet */
1888 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1890 SilcServerKEInternalContext *proto_ctx =
1891 (SilcServerKEInternalContext *)sock->protocol->context;
1893 if (proto_ctx->packet)
1894 silc_packet_context_free(proto_ctx->packet);
1896 proto_ctx->packet = silc_packet_context_dup(packet);
1897 proto_ctx->dest_id_type = packet->src_id_type;
1898 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1899 packet->src_id_type);
1900 if (!proto_ctx->dest_id)
1903 /* Let the protocol handle the packet */
1904 silc_protocol_execute(sock->protocol, server->timeout_queue,
1908 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1909 "protocol active, packet dropped."));
1913 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1915 * Connection authentication request packet. When we receive this packet
1916 * we will send to the other end information about our mandatory
1917 * authentication method for the connection. This packet maybe received
1920 SILC_LOG_DEBUG(("Connection authentication request packet"));
1921 if (packet->flags & SILC_PACKET_FLAG_LIST)
1923 silc_server_connection_auth_request(server, sock, packet);
1927 * Connection Authentication protocol packets
1929 case SILC_PACKET_CONNECTION_AUTH:
1930 /* Start of the authentication protocol. We receive here the
1931 authentication data and will verify it. */
1932 SILC_LOG_DEBUG(("Connection auth packet"));
1933 if (packet->flags & SILC_PACKET_FLAG_LIST)
1936 if (sock->protocol && sock->protocol->protocol->type
1937 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1939 SilcServerConnAuthInternalContext *proto_ctx =
1940 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1942 proto_ctx->packet = silc_packet_context_dup(packet);
1944 /* Let the protocol handle the packet */
1945 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1947 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1948 "protocol active, packet dropped."));
1952 case SILC_PACKET_NEW_ID:
1954 * Received New ID packet. This includes some new ID that has been
1955 * created. It may be for client, server or channel. This is the way
1956 * to distribute information about new registered entities in the
1959 SILC_LOG_DEBUG(("New ID packet"));
1960 if (packet->flags & SILC_PACKET_FLAG_LIST)
1961 silc_server_new_id_list(server, sock, packet);
1963 silc_server_new_id(server, sock, packet);
1966 case SILC_PACKET_NEW_CLIENT:
1968 * Received new client packet. This includes client information that
1969 * we will use to create initial client ID. After creating new
1970 * ID we will send it to the client.
1972 SILC_LOG_DEBUG(("New Client packet"));
1973 if (packet->flags & SILC_PACKET_FLAG_LIST)
1975 silc_server_new_client(server, sock, packet);
1978 case SILC_PACKET_NEW_SERVER:
1980 * Received new server packet. This includes Server ID and some other
1981 * information that we may save. This is received after server has
1984 SILC_LOG_DEBUG(("New Server packet"));
1985 if (packet->flags & SILC_PACKET_FLAG_LIST)
1987 silc_server_new_server(server, sock, packet);
1990 case SILC_PACKET_NEW_CHANNEL:
1992 * Received new channel packet. Information about new channel in the
1993 * network are distributed using this packet.
1995 SILC_LOG_DEBUG(("New Channel packet"));
1996 if (packet->flags & SILC_PACKET_FLAG_LIST)
1997 silc_server_new_channel_list(server, sock, packet);
1999 silc_server_new_channel(server, sock, packet);
2002 case SILC_PACKET_HEARTBEAT:
2004 * Received heartbeat.
2006 SILC_LOG_DEBUG(("Heartbeat packet"));
2007 if (packet->flags & SILC_PACKET_FLAG_LIST)
2011 case SILC_PACKET_KEY_AGREEMENT:
2013 * Received heartbeat.
2015 SILC_LOG_DEBUG(("Key agreement packet"));
2016 if (packet->flags & SILC_PACKET_FLAG_LIST)
2018 silc_server_key_agreement(server, sock, packet);
2021 case SILC_PACKET_REKEY:
2023 * Received re-key packet. The sender wants to regenerate the session
2026 SILC_LOG_DEBUG(("Re-key packet"));
2027 if (packet->flags & SILC_PACKET_FLAG_LIST)
2029 silc_server_rekey(server, sock, packet);
2032 case SILC_PACKET_REKEY_DONE:
2034 * The re-key is done.
2036 SILC_LOG_DEBUG(("Re-key done packet"));
2037 if (packet->flags & SILC_PACKET_FLAG_LIST)
2040 if (sock->protocol && sock->protocol->protocol &&
2041 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2043 SilcServerRekeyInternalContext *proto_ctx =
2044 (SilcServerRekeyInternalContext *)sock->protocol->context;
2046 if (proto_ctx->packet)
2047 silc_packet_context_free(proto_ctx->packet);
2049 proto_ctx->packet = silc_packet_context_dup(packet);
2051 /* Let the protocol handle the packet */
2052 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
2054 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2055 "protocol active, packet dropped."));
2060 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2066 /* Creates connection to a remote router. */
2068 void silc_server_create_connection(SilcServer server,
2069 char *remote_host, uint32 port)
2071 SilcServerConnection sconn;
2073 /* Allocate connection object for hold connection specific stuff. */
2074 sconn = silc_calloc(1, sizeof(*sconn));
2075 sconn->server = server;
2076 sconn->remote_host = strdup(remote_host);
2077 sconn->remote_port = port;
2079 silc_task_register(server->timeout_queue, 0,
2080 silc_server_connect_router,
2081 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2082 SILC_TASK_PRI_NORMAL);
2085 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2087 silc_socket_free((SilcSocketConnection)context);
2090 /* Closes connection to socket connection */
2092 void silc_server_close_connection(SilcServer server,
2093 SilcSocketConnection sock)
2095 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2097 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2098 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2099 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2100 "Router"), sock->sock));
2102 /* If any protocol is active cancel its execution */
2103 if (sock->protocol) {
2104 silc_protocol_cancel(sock->protocol, server->timeout_queue);
2105 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2106 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2107 sock->protocol = NULL;
2110 /* We won't listen for this connection anymore */
2111 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2113 /* Unregister all tasks */
2114 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2115 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2117 /* Close the actual connection */
2118 silc_net_close_connection(sock->sock);
2119 server->sockets[sock->sock] = NULL;
2121 silc_task_register(server->timeout_queue, 0,
2122 silc_server_close_connection_final,
2123 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2124 SILC_TASK_PRI_NORMAL);
2127 /* Sends disconnect message to remote connection and disconnects the
2130 void silc_server_disconnect_remote(SilcServer server,
2131 SilcSocketConnection sock,
2132 const char *fmt, ...)
2135 unsigned char buf[4096];
2140 memset(buf, 0, sizeof(buf));
2142 vsprintf(buf, fmt, ap);
2145 SILC_LOG_DEBUG(("Disconnecting remote host"));
2147 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2149 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2150 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2151 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2154 /* Notify remote end that the conversation is over. The notify message
2155 is tried to be sent immediately. */
2156 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2157 buf, strlen(buf), TRUE);
2159 /* Mark the connection to be disconnected */
2160 SILC_SET_DISCONNECTED(sock);
2161 silc_server_close_connection(server, sock);
2166 SilcClientEntry client;
2167 } *FreeClientInternal;
2169 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2171 FreeClientInternal i = (FreeClientInternal)context;
2173 silc_idlist_del_data(i->client);
2174 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2178 /* Frees client data and notifies about client's signoff. */
2180 void silc_server_free_client_data(SilcServer server,
2181 SilcSocketConnection sock,
2182 SilcClientEntry client,
2186 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2188 /* If there is pending outgoing data for the client then purge it
2189 to the network before removing the client entry. */
2190 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2191 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2192 server->stat.packets_sent++;
2194 if (sock->outbuf->data - sock->outbuf->head)
2195 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2197 silc_packet_send(sock, TRUE);
2199 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2200 SILC_UNSET_OUTBUF_PENDING(sock);
2201 silc_buffer_clear(sock->outbuf);
2204 /* Send SIGNOFF notify to routers. */
2205 if (notify && !server->standalone && server->router)
2206 silc_server_send_notify_signoff(server, server->router->connection,
2207 server->server_type == SILC_SERVER ?
2208 FALSE : TRUE, client->id, signoff);
2210 /* Remove client from all channels */
2212 silc_server_remove_from_channels(server, NULL, client,
2213 TRUE, signoff, TRUE);
2215 silc_server_remove_from_channels(server, NULL, client,
2216 FALSE, NULL, FALSE);
2218 /* We will not delete the client entry right away. We will take it
2219 into history (for WHOWAS command) for 5 minutes */
2222 silc_task_register(server->timeout_queue, 0,
2223 silc_server_free_client_data_timeout,
2225 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2226 client->data.registered = FALSE;
2228 /* Free the client entry and everything in it */
2229 server->stat.my_clients--;
2230 server->stat.clients--;
2231 if (server->server_type == SILC_ROUTER)
2232 server->stat.cell_clients--;
2235 /* Frees user_data pointer from socket connection object. This also sends
2236 appropriate notify packets to the network to inform about leaving
2239 void silc_server_free_sock_user_data(SilcServer server,
2240 SilcSocketConnection sock)
2242 SILC_LOG_DEBUG(("Start"));
2244 switch(sock->type) {
2245 case SILC_SOCKET_TYPE_CLIENT:
2247 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2248 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2251 case SILC_SOCKET_TYPE_SERVER:
2252 case SILC_SOCKET_TYPE_ROUTER:
2254 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2256 /* Free all client entries that this server owns as they will
2257 become invalid now as well. */
2259 silc_server_remove_clients_by_server(server, user_data, TRUE);
2261 /* If this was our primary router connection then we're lost to
2262 the outside world. */
2263 if (server->router == user_data) {
2264 server->id_entry->router = NULL;
2265 server->router = NULL;
2266 server->standalone = TRUE;
2269 /* Free the server entry */
2270 silc_idlist_del_data(user_data);
2271 silc_idlist_del_server(server->local_list, user_data);
2272 server->stat.my_servers--;
2273 server->stat.servers--;
2274 if (server->server_type == SILC_ROUTER)
2275 server->stat.cell_servers--;
2280 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2282 silc_idlist_del_data(user_data);
2283 silc_free(user_data);
2288 sock->user_data = NULL;
2291 /* This function is used to remove all client entries by the server `entry'.
2292 This is called when the connection is lost to the server. In this case
2293 we must invalidate all the client entries owned by the server `entry'.
2294 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2295 distributed to our local clients. */
2297 int silc_server_remove_clients_by_server(SilcServer server,
2298 SilcServerEntry entry,
2301 SilcIDCacheList list = NULL;
2302 SilcIDCacheEntry id_cache = NULL;
2303 SilcClientEntry client = NULL;
2305 SilcClientEntry *clients = NULL;
2306 uint32 clients_c = 0;
2307 unsigned char **argv = NULL;
2308 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2309 SilcHashTable channels;
2310 SilcChannelClientEntry chl;
2311 SilcChannelEntry channel;
2312 SilcHashTableList htl;
2315 SILC_LOG_DEBUG(("Start"));
2317 /* Allocate the hash table that holds the channels that require
2318 channel key re-generation after we've removed this server's clients
2319 from the channels. */
2320 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2323 if (server_signoff) {
2324 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2325 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2326 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2327 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2328 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2329 memcpy(argv[argc], idp->data, idp->len);
2330 argv_lens[argc] = idp->len;
2331 argv_types[argc] = argc + 1;
2333 silc_buffer_free(idp);
2336 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2338 if (silc_idcache_list_first(list, &id_cache)) {
2340 client = (SilcClientEntry)id_cache->context;
2341 if (client->data.registered == FALSE) {
2342 if (!silc_idcache_list_next(list, &id_cache))
2348 if (client->router != entry) {
2349 if (server_signoff && client->connection) {
2350 clients = silc_realloc(clients,
2351 sizeof(*clients) * (clients_c + 1));
2352 clients[clients_c] = client;
2356 if (!silc_idcache_list_next(list, &id_cache))
2362 if (server_signoff) {
2363 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2364 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2365 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2367 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2369 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2370 memcpy(argv[argc], idp->data, idp->len);
2371 argv_lens[argc] = idp->len;
2372 argv_types[argc] = argc + 1;
2374 silc_buffer_free(idp);
2377 silc_hash_table_list(client->channels, &htl);
2378 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2379 if (silc_hash_table_find(channels, chl->channel, NULL, NULL))
2381 silc_hash_table_add(channels, chl->channel, chl->channel);
2384 /* Remove the client entry */
2385 silc_server_remove_from_channels(server, NULL, client, FALSE,
2387 silc_idlist_del_client(server->local_list, client);
2389 if (!silc_idcache_list_next(list, &id_cache))
2393 silc_idcache_list_free(list);
2396 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2398 if (silc_idcache_list_first(list, &id_cache)) {
2400 client = (SilcClientEntry)id_cache->context;
2401 if (client->data.registered == FALSE) {
2402 if (!silc_idcache_list_next(list, &id_cache))
2408 if (client->router != entry) {
2409 if (server_signoff && client->connection) {
2410 clients = silc_realloc(clients,
2411 sizeof(*clients) * (clients_c + 1));
2412 clients[clients_c] = client;
2416 if (!silc_idcache_list_next(list, &id_cache))
2422 if (server_signoff) {
2423 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2424 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2425 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2427 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2429 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2430 memcpy(argv[argc], idp->data, idp->len);
2431 argv_lens[argc] = idp->len;
2432 argv_types[argc] = argc + 1;
2434 silc_buffer_free(idp);
2437 silc_hash_table_list(client->channels, &htl);
2438 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2439 if (silc_hash_table_find(channels, chl->channel, NULL, NULL))
2441 silc_hash_table_add(channels, chl->channel, chl->channel);
2444 /* Remove the client entry */
2445 silc_server_remove_from_channels(server, NULL, client, FALSE,
2447 silc_idlist_del_client(server->global_list, client);
2449 if (!silc_idcache_list_next(list, &id_cache))
2453 silc_idcache_list_free(list);
2456 /* Send the SERVER_SIGNOFF notify */
2457 if (server_signoff) {
2460 /* Send SERVER_SIGNOFF notify to our primary router */
2461 if (!server->standalone && server->router &&
2462 server->router != entry) {
2463 args = silc_argument_payload_encode(1, argv, argv_lens,
2465 silc_server_send_notify_args(server,
2466 server->router->connection,
2467 server->server_type == SILC_SERVER ?
2469 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2471 silc_buffer_free(args);
2474 args = silc_argument_payload_encode(argc, argv, argv_lens,
2476 /* Send to local clients */
2477 for (i = 0; i < clients_c; i++) {
2478 silc_server_send_notify_args(server, clients[i]->connection,
2479 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2484 silc_buffer_free(args);
2485 for (i = 0; i < argc; i++)
2488 silc_free(argv_lens);
2489 silc_free(argv_types);
2492 /* We must now re-generate the channel key for all channels that had
2493 this server's client(s) on the channel. As they left the channel we
2494 must re-generate the channel key. */
2495 silc_hash_table_list(channels, &htl);
2496 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2497 silc_server_create_channel_key(server, channel, 0);
2498 silc_server_send_channel_key(server, NULL, channel,
2499 server->server_type == SILC_ROUTER ?
2500 FALSE : !server->standalone);
2502 silc_hash_table_free(channels);
2507 /* Checks whether given channel has global users. If it does this returns
2508 TRUE and FALSE if there is only locally connected clients on the channel. */
2510 int silc_server_channel_has_global(SilcChannelEntry channel)
2512 SilcChannelClientEntry chl;
2513 SilcHashTableList htl;
2515 silc_hash_table_list(channel->user_list, &htl);
2516 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2517 if (chl->client->router)
2524 /* Checks whether given channel has locally connected users. If it does this
2525 returns TRUE and FALSE if there is not one locally connected client. */
2527 int silc_server_channel_has_local(SilcChannelEntry channel)
2529 SilcChannelClientEntry chl;
2530 SilcHashTableList htl;
2532 silc_hash_table_list(channel->user_list, &htl);
2533 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2534 if (!chl->client->router)
2541 /* Removes client from all channels it has joined. This is used when client
2542 connection is disconnected. If the client on a channel is last, the
2543 channel is removed as well. This sends the SIGNOFF notify types. */
2545 void silc_server_remove_from_channels(SilcServer server,
2546 SilcSocketConnection sock,
2547 SilcClientEntry client,
2549 char *signoff_message,
2552 SilcChannelEntry channel;
2553 SilcChannelClientEntry chl;
2554 SilcHashTableList htl;
2557 SILC_LOG_DEBUG(("Start"));
2559 if (!client || !client->id)
2562 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2564 /* Remove the client from all channels. The client is removed from
2565 the channels' user list. */
2566 silc_hash_table_list(client->channels, &htl);
2567 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2568 channel = chl->channel;
2570 /* Remove channel from client's channel list */
2571 silc_hash_table_del(client->channels, channel);
2573 /* Remove channel if there is no users anymore */
2574 if (server->server_type == SILC_ROUTER &&
2575 silc_hash_table_count(channel->user_list) < 2) {
2577 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2578 if (!silc_idlist_del_channel(server->local_list, channel))
2579 silc_idlist_del_channel(server->global_list, channel);
2580 server->stat.my_channels--;
2584 /* Remove client from channel's client list */
2585 silc_hash_table_del(channel->user_list, chl->client);
2587 server->stat.my_chanclients--;
2589 /* If there is no global users on the channel anymore mark the channel
2590 as local channel. Do not check if the removed client is local client. */
2591 if (server->server_type == SILC_SERVER && channel->global_users &&
2592 chl->client->router && !silc_server_channel_has_global(channel))
2593 channel->global_users = FALSE;
2595 /* If there is not at least one local user on the channel then we don't
2596 need the channel entry anymore, we can remove it safely. */
2597 if (server->server_type == SILC_SERVER &&
2598 !silc_server_channel_has_local(channel)) {
2599 /* Notify about leaving client if this channel has global users. */
2600 if (notify && channel->global_users)
2601 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2602 SILC_NOTIFY_TYPE_SIGNOFF,
2603 signoff_message ? 2 : 1,
2604 clidp->data, clidp->len,
2605 signoff_message, signoff_message ?
2606 strlen(signoff_message) : 0);
2609 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2611 if (channel->founder_key) {
2612 /* The founder auth data exists, do not remove the channel entry */
2613 SilcChannelClientEntry chl2;
2614 SilcHashTableList htl2;
2618 silc_hash_table_list(channel->user_list, &htl2);
2619 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2620 silc_hash_table_del(chl2->client->channels, channel);
2621 silc_hash_table_del(channel->user_list, chl2->client);
2627 /* Remove the channel entry */
2628 if (!silc_idlist_del_channel(server->local_list, channel))
2629 silc_idlist_del_channel(server->global_list, channel);
2630 server->stat.my_channels--;
2634 /* Send notify to channel about client leaving SILC and thus
2635 the entire channel. */
2637 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2638 SILC_NOTIFY_TYPE_SIGNOFF,
2639 signoff_message ? 2 : 1,
2640 clidp->data, clidp->len,
2641 signoff_message, signoff_message ?
2642 strlen(signoff_message) : 0);
2644 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2645 /* Re-generate channel key */
2646 silc_server_create_channel_key(server, channel, 0);
2648 /* Send the channel key to the channel. The key of course is not sent
2649 to the client who was removed from the channel. */
2650 silc_server_send_channel_key(server, client->connection, channel,
2651 server->server_type == SILC_ROUTER ?
2652 FALSE : !server->standalone);
2656 silc_buffer_free(clidp);
2659 /* Removes client from one channel. This is used for example when client
2660 calls LEAVE command to remove itself from the channel. Returns TRUE
2661 if channel still exists and FALSE if the channel is removed when
2662 last client leaves the channel. If `notify' is FALSE notify messages
2665 int silc_server_remove_from_one_channel(SilcServer server,
2666 SilcSocketConnection sock,
2667 SilcChannelEntry channel,
2668 SilcClientEntry client,
2671 SilcChannelClientEntry chl;
2674 SILC_LOG_DEBUG(("Start"));
2676 /* Get the entry to the channel, if this client is not on the channel
2678 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2681 /* Remove the client from the channel. The client is removed from
2682 the channel's user list. */
2684 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2686 /* Remove channel from client's channel list */
2687 silc_hash_table_del(client->channels, chl->channel);
2689 /* Remove channel if there is no users anymore */
2690 if (server->server_type == SILC_ROUTER &&
2691 silc_hash_table_count(channel->user_list) < 2) {
2693 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2694 if (!silc_idlist_del_channel(server->local_list, channel))
2695 silc_idlist_del_channel(server->global_list, channel);
2696 silc_buffer_free(clidp);
2697 server->stat.my_channels--;
2701 /* Remove client from channel's client list */
2702 silc_hash_table_del(channel->user_list, chl->client);
2704 server->stat.my_chanclients--;
2706 /* If there is no global users on the channel anymore mark the channel
2707 as local channel. Do not check if the client is local client. */
2708 if (server->server_type == SILC_SERVER && channel->global_users &&
2709 chl->client->router && !silc_server_channel_has_global(channel))
2710 channel->global_users = FALSE;
2712 /* If there is not at least one local user on the channel then we don't
2713 need the channel entry anymore, we can remove it safely. */
2714 if (server->server_type == SILC_SERVER &&
2715 !silc_server_channel_has_local(channel)) {
2716 /* Notify about leaving client if this channel has global users. */
2717 if (notify && channel->global_users)
2718 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2719 SILC_NOTIFY_TYPE_LEAVE, 1,
2720 clidp->data, clidp->len);
2722 silc_buffer_free(clidp);
2725 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2727 if (channel->founder_key) {
2728 /* The founder auth data exists, do not remove the channel entry */
2729 SilcChannelClientEntry chl2;
2730 SilcHashTableList htl2;
2734 silc_hash_table_list(channel->user_list, &htl2);
2735 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2736 silc_hash_table_del(chl2->client->channels, channel);
2737 silc_hash_table_del(channel->user_list, chl2->client);
2743 /* Remove the channel entry */
2744 if (!silc_idlist_del_channel(server->local_list, channel))
2745 silc_idlist_del_channel(server->global_list, channel);
2746 server->stat.my_channels--;
2750 /* Send notify to channel about client leaving the channel */
2752 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2753 SILC_NOTIFY_TYPE_LEAVE, 1,
2754 clidp->data, clidp->len);
2756 silc_buffer_free(clidp);
2760 /* Returns TRUE if the given client is on the channel. FALSE if not.
2761 This works because we assure that the user list on the channel is
2762 always in up to date thus we can only check the channel list from
2763 `client' which is faster than checking the user list from `channel'. */
2765 int silc_server_client_on_channel(SilcClientEntry client,
2766 SilcChannelEntry channel)
2768 if (!client || !channel)
2771 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2777 /* Timeout callback. This is called if connection is idle or for some
2778 other reason is not responding within some period of time. This
2779 disconnects the remote end. */
2781 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2783 SilcServer server = (SilcServer)context;
2784 SilcSocketConnection sock = server->sockets[fd];
2786 SILC_LOG_DEBUG(("Start"));
2791 /* If we have protocol active we must assure that we call the protocol's
2792 final callback so that all the memory is freed. */
2793 if (sock->protocol) {
2794 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2795 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2799 if (sock->user_data)
2800 silc_server_free_sock_user_data(server, sock);
2802 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2803 "Connection timeout");
2806 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2807 function may be used only by router. In real SILC network all channels
2808 are created by routers thus this function is never used by normal
2811 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2812 SilcServerID *router_id,
2818 SilcChannelID *channel_id;
2819 SilcChannelEntry entry;
2823 SILC_LOG_DEBUG(("Creating new channel"));
2826 cipher = "aes-256-cbc";
2828 hmac = "hmac-sha1-96";
2830 /* Allocate cipher */
2831 if (!silc_cipher_alloc(cipher, &key))
2835 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2836 silc_cipher_free(key);
2840 channel_name = strdup(channel_name);
2842 /* Create the channel */
2843 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2844 entry = silc_idlist_add_channel(server->local_list, channel_name,
2845 SILC_CHANNEL_MODE_NONE, channel_id,
2846 NULL, key, newhmac);
2848 silc_free(channel_name);
2849 silc_cipher_free(key);
2850 silc_hmac_free(newhmac);
2854 entry->cipher = strdup(cipher);
2855 entry->hmac_name = strdup(hmac);
2857 /* Now create the actual key material */
2858 silc_server_create_channel_key(server, entry,
2859 silc_cipher_get_key_len(key) / 8);
2861 /* Notify other routers about the new channel. We send the packet
2862 to our primary route. */
2863 if (broadcast && server->standalone == FALSE)
2864 silc_server_send_new_channel(server, server->router->connection, TRUE,
2865 channel_name, entry->id,
2866 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2869 server->stat.my_channels++;
2874 /* Same as above but creates the channel with Channel ID `channel_id. */
2877 silc_server_create_new_channel_with_id(SilcServer server,
2881 SilcChannelID *channel_id,
2884 SilcChannelEntry entry;
2888 SILC_LOG_DEBUG(("Creating new channel"));
2891 cipher = "aes-256-cbc";
2893 hmac = "hmac-sha1-96";
2895 /* Allocate cipher */
2896 if (!silc_cipher_alloc(cipher, &key))
2900 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2901 silc_cipher_free(key);
2905 channel_name = strdup(channel_name);
2907 /* Create the channel */
2908 entry = silc_idlist_add_channel(server->local_list, channel_name,
2909 SILC_CHANNEL_MODE_NONE, channel_id,
2910 NULL, key, newhmac);
2912 silc_free(channel_name);
2916 /* Now create the actual key material */
2917 silc_server_create_channel_key(server, entry,
2918 silc_cipher_get_key_len(key) / 8);
2920 /* Notify other routers about the new channel. We send the packet
2921 to our primary route. */
2922 if (broadcast && server->standalone == FALSE)
2923 silc_server_send_new_channel(server, server->router->connection, TRUE,
2924 channel_name, entry->id,
2925 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2928 server->stat.my_channels++;
2933 /* Channel's key re-key timeout callback. */
2935 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2937 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2938 SilcServer server = (SilcServer)rekey->context;
2940 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2941 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2943 silc_task_register(server->timeout_queue, 0,
2944 silc_server_channel_key_rekey,
2945 (void *)rekey, 3600, 0,
2947 SILC_TASK_PRI_NORMAL);
2950 /* Generates new channel key. This is used to create the initial channel key
2951 but also to re-generate new key for channel. If `key_len' is provided
2952 it is the bytes of the key length. */
2954 void silc_server_create_channel_key(SilcServer server,
2955 SilcChannelEntry channel,
2959 unsigned char channel_key[32], hash[32];
2962 SILC_LOG_DEBUG(("Generating channel key"));
2964 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2965 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2969 if (!channel->channel_key)
2970 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2975 else if (channel->key_len)
2976 len = channel->key_len / 8;
2978 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2980 /* Create channel key */
2981 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2984 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2986 /* Remove old key if exists */
2988 memset(channel->key, 0, channel->key_len / 8);
2989 silc_free(channel->key);
2993 channel->key_len = len * 8;
2994 channel->key = silc_calloc(len, sizeof(*channel->key));
2995 memcpy(channel->key, channel_key, len);
2996 memset(channel_key, 0, sizeof(channel_key));
2998 /* Generate HMAC key from the channel key data and set it */
3000 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3001 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
3002 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3003 memset(hash, 0, sizeof(hash));
3005 if (server->server_type == SILC_ROUTER) {
3006 if (!channel->rekey)
3007 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3008 channel->rekey->context = (void *)server;
3009 channel->rekey->channel = channel;
3010 channel->rekey->key_len = key_len;
3012 silc_task_unregister_by_callback(server->timeout_queue,
3013 silc_server_channel_key_rekey);
3014 silc_task_register(server->timeout_queue, 0,
3015 silc_server_channel_key_rekey,
3016 (void *)channel->rekey, 3600, 0,
3018 SILC_TASK_PRI_NORMAL);
3022 /* Saves the channel key found in the encoded `key_payload' buffer. This
3023 function is used when we receive Channel Key Payload and also when we're
3024 processing JOIN command reply. Returns entry to the channel. */
3026 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3027 SilcBuffer key_payload,
3028 SilcChannelEntry channel)
3030 SilcChannelKeyPayload payload = NULL;
3031 SilcChannelID *id = NULL;
3032 unsigned char *tmp, hash[32];
3036 SILC_LOG_DEBUG(("Start"));
3038 /* Decode channel key payload */
3039 payload = silc_channel_key_payload_parse(key_payload);
3041 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3046 /* Get the channel entry */
3049 /* Get channel ID */
3050 tmp = silc_channel_key_get_id(payload, &tmp_len);
3051 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3057 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3059 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3061 SILC_LOG_ERROR(("Received key for non-existent channel"));
3067 tmp = silc_channel_key_get_key(payload, &tmp_len);
3073 cipher = silc_channel_key_get_cipher(payload, NULL);
3079 /* Remove old key if exists */
3081 memset(channel->key, 0, channel->key_len / 8);
3082 silc_free(channel->key);
3083 silc_cipher_free(channel->channel_key);
3086 /* Create new cipher */
3087 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3092 if (channel->cipher)
3093 silc_free(channel->cipher);
3094 channel->cipher = strdup(cipher);
3097 channel->key_len = tmp_len * 8;
3098 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3099 memcpy(channel->key, tmp, tmp_len);
3100 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3102 /* Generate HMAC key from the channel key data and set it */
3104 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3105 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3106 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3108 memset(hash, 0, sizeof(hash));
3109 memset(tmp, 0, tmp_len);
3111 if (server->server_type == SILC_ROUTER) {
3112 if (!channel->rekey)
3113 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3114 channel->rekey->context = (void *)server;
3115 channel->rekey->channel = channel;
3117 silc_task_unregister_by_callback(server->timeout_queue,
3118 silc_server_channel_key_rekey);
3119 silc_task_register(server->timeout_queue, 0,
3120 silc_server_channel_key_rekey,
3121 (void *)channel->rekey, 3600, 0,
3123 SILC_TASK_PRI_NORMAL);
3130 silc_channel_key_payload_free(payload);
3135 /* Heartbeat callback. This function is set as argument for the
3136 silc_socket_set_heartbeat function. The library will call this function
3137 at the set time interval. */
3139 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3142 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3144 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3147 /* Send the heartbeat */
3148 silc_server_send_heartbeat(hb->server, sock);
3151 /* Returns assembled of all servers in the given ID list. The packet's
3152 form is dictated by the New ID payload. */
3154 static void silc_server_announce_get_servers(SilcServer server,
3156 SilcBuffer *servers)
3158 SilcIDCacheList list;
3159 SilcIDCacheEntry id_cache;
3160 SilcServerEntry entry;
3163 /* Go through all clients in the list */
3164 if (silc_idcache_get_all(id_list->servers, &list)) {
3165 if (silc_idcache_list_first(list, &id_cache)) {
3167 entry = (SilcServerEntry)id_cache->context;
3169 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3171 *servers = silc_buffer_realloc(*servers,
3173 (*servers)->truelen + idp->len :
3175 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3176 silc_buffer_put(*servers, idp->data, idp->len);
3177 silc_buffer_pull(*servers, idp->len);
3178 silc_buffer_free(idp);
3180 if (!silc_idcache_list_next(list, &id_cache))
3185 silc_idcache_list_free(list);
3189 /* This function is used by router to announce existing servers to our
3190 primary router when we've connected to it. */
3192 void silc_server_announce_servers(SilcServer server)
3194 SilcBuffer servers = NULL;
3196 SILC_LOG_DEBUG(("Announcing servers"));
3198 /* Get servers in local list */
3199 silc_server_announce_get_servers(server, server->local_list, &servers);
3201 /* Get servers in global list */
3202 silc_server_announce_get_servers(server, server->global_list, &servers);
3205 silc_buffer_push(servers, servers->data - servers->head);
3206 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3208 /* Send the packet */
3209 silc_server_packet_send(server, server->router->connection,
3210 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3211 servers->data, servers->len, TRUE);
3213 silc_buffer_free(servers);
3217 /* Returns assembled packet of all clients in the given ID list. The
3218 packet's form is dictated by the New ID Payload. */
3220 static void silc_server_announce_get_clients(SilcServer server,
3222 SilcBuffer *clients)
3224 SilcIDCacheList list;
3225 SilcIDCacheEntry id_cache;
3226 SilcClientEntry client;
3229 /* Go through all clients in the list */
3230 if (silc_idcache_get_all(id_list->clients, &list)) {
3231 if (silc_idcache_list_first(list, &id_cache)) {
3233 client = (SilcClientEntry)id_cache->context;
3235 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3237 *clients = silc_buffer_realloc(*clients,
3239 (*clients)->truelen + idp->len :
3241 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3242 silc_buffer_put(*clients, idp->data, idp->len);
3243 silc_buffer_pull(*clients, idp->len);
3244 silc_buffer_free(idp);
3246 if (!silc_idcache_list_next(list, &id_cache))
3251 silc_idcache_list_free(list);
3255 /* This function is used to announce our existing clients to our router
3256 when we've connected to it. */
3258 void silc_server_announce_clients(SilcServer server)
3260 SilcBuffer clients = NULL;
3262 SILC_LOG_DEBUG(("Announcing clients"));
3264 /* Get clients in local list */
3265 silc_server_announce_get_clients(server, server->local_list,
3268 /* As router we announce our global list as well */
3269 if (server->server_type == SILC_ROUTER)
3270 silc_server_announce_get_clients(server, server->global_list,
3274 silc_buffer_push(clients, clients->data - clients->head);
3275 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3277 /* Send the packet */
3278 silc_server_packet_send(server, server->router->connection,
3279 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3280 clients->data, clients->len, TRUE);
3282 silc_buffer_free(clients);
3287 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3292 return silc_notify_payload_encode(notify, argc, ap);
3295 /* Returns assembled packets for channel users of the `channel'. */
3297 void silc_server_announce_get_channel_users(SilcServer server,
3298 SilcChannelEntry channel,
3299 SilcBuffer *channel_users,
3300 SilcBuffer *channel_users_modes)
3302 SilcChannelClientEntry chl;
3303 SilcHashTableList htl;
3304 SilcBuffer chidp, clidp;
3307 unsigned char mode[4];
3309 SILC_LOG_DEBUG(("Start"));
3311 /* Now find all users on the channel */
3312 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3313 silc_hash_table_list(channel->user_list, &htl);
3314 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3315 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3318 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3319 clidp->data, clidp->len,
3320 chidp->data, chidp->len);
3323 silc_buffer_realloc(*channel_users,
3325 (*channel_users)->truelen + len : len));
3326 silc_buffer_pull_tail(*channel_users,
3327 ((*channel_users)->end -
3328 (*channel_users)->data));
3330 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3331 silc_buffer_pull(*channel_users, len);
3332 silc_buffer_free(tmp);
3334 /* CUMODE notify for mode change on the channel */
3335 SILC_PUT32_MSB(chl->mode, mode);
3336 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3337 3, clidp->data, clidp->len,
3339 clidp->data, clidp->len);
3341 *channel_users_modes =
3342 silc_buffer_realloc(*channel_users_modes,
3343 (*channel_users_modes ?
3344 (*channel_users_modes)->truelen + len : len));
3345 silc_buffer_pull_tail(*channel_users_modes,
3346 ((*channel_users_modes)->end -
3347 (*channel_users_modes)->data));
3349 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3350 silc_buffer_pull(*channel_users_modes, len);
3351 silc_buffer_free(tmp);
3353 silc_buffer_free(clidp);
3355 silc_buffer_free(chidp);
3358 /* Returns assembled packets for all channels and users on those channels
3359 from the given ID List. The packets are in the form dictated by the
3360 New Channel and New Channel User payloads. */
3362 void silc_server_announce_get_channels(SilcServer server,
3364 SilcBuffer *channels,
3365 SilcBuffer *channel_users,
3366 SilcBuffer **channel_users_modes,
3367 uint32 *channel_users_modes_c,
3368 SilcChannelID ***channel_ids)
3370 SilcIDCacheList list;
3371 SilcIDCacheEntry id_cache;
3372 SilcChannelEntry channel;
3377 int i = *channel_users_modes_c;
3379 SILC_LOG_DEBUG(("Start"));
3381 /* Go through all channels in the list */
3382 if (silc_idcache_get_all(id_list->channels, &list)) {
3383 if (silc_idcache_list_first(list, &id_cache)) {
3385 channel = (SilcChannelEntry)id_cache->context;
3387 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3388 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3389 name_len = strlen(channel->channel_name);
3391 len = 4 + name_len + id_len + 4;
3393 silc_buffer_realloc(*channels,
3394 (*channels ? (*channels)->truelen + len : len));
3395 silc_buffer_pull_tail(*channels,
3396 ((*channels)->end - (*channels)->data));
3397 silc_buffer_format(*channels,
3398 SILC_STR_UI_SHORT(name_len),
3399 SILC_STR_UI_XNSTRING(channel->channel_name,
3401 SILC_STR_UI_SHORT(id_len),
3402 SILC_STR_UI_XNSTRING(cid, id_len),
3403 SILC_STR_UI_INT(channel->mode),
3405 silc_buffer_pull(*channels, len);
3407 *channel_users_modes = silc_realloc(*channel_users_modes,
3408 sizeof(**channel_users_modes) *
3410 (*channel_users_modes)[i] = NULL;
3411 *channel_ids = silc_realloc(*channel_ids,
3412 sizeof(**channel_ids) * (i + 1));
3413 (*channel_ids)[i] = NULL;
3414 silc_server_announce_get_channel_users(server, channel,
3416 channel_users_modes[i]);
3417 (*channel_ids)[i] = channel->id;
3420 if (!silc_idcache_list_next(list, &id_cache))
3424 *channel_users_modes_c += i;
3427 silc_idcache_list_free(list);
3431 /* This function is used to announce our existing channels to our router
3432 when we've connected to it. This also announces the users on the
3433 channels to the router. */
3435 void silc_server_announce_channels(SilcServer server)
3437 SilcBuffer channels = NULL, channel_users = NULL;
3438 SilcBuffer *channel_users_modes = NULL;
3439 uint32 channel_users_modes_c = 0;
3440 SilcChannelID **channel_ids = NULL;
3442 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3444 /* Get channels and channel users in local list */
3445 silc_server_announce_get_channels(server, server->local_list,
3446 &channels, &channel_users,
3447 &channel_users_modes,
3448 &channel_users_modes_c,
3451 /* Get channels and channel users in global list */
3452 silc_server_announce_get_channels(server, server->global_list,
3453 &channels, &channel_users,
3454 &channel_users_modes,
3455 &channel_users_modes_c,
3459 silc_buffer_push(channels, channels->data - channels->head);
3460 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3462 /* Send the packet */
3463 silc_server_packet_send(server, server->router->connection,
3464 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3465 channels->data, channels->len,
3468 silc_buffer_free(channels);
3471 if (channel_users) {
3472 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3473 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3474 channel_users->len);
3476 /* Send the packet */
3477 silc_server_packet_send(server, server->router->connection,
3478 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3479 channel_users->data, channel_users->len,
3482 silc_buffer_free(channel_users);
3485 if (channel_users_modes) {
3488 for (i = 0; i < channel_users_modes_c; i++) {
3489 silc_buffer_push(channel_users_modes[i],
3490 channel_users_modes[i]->data -
3491 channel_users_modes[i]->head);
3492 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3493 channel_users_modes[i]->len);
3494 silc_server_packet_send_dest(server, server->router->connection,
3495 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3496 channel_ids[i], SILC_ID_CHANNEL,
3497 channel_users_modes[i]->data,
3498 channel_users_modes[i]->len,
3500 silc_buffer_free(channel_users_modes[i]);
3502 silc_free(channel_users_modes);
3503 silc_free(channel_ids);
3507 /* Failure timeout callback. If this is called then we will immediately
3508 process the received failure. We always process the failure with timeout
3509 since we do not want to blindly trust to received failure packets.
3510 This won't be called (the timeout is cancelled) if the failure was
3511 bogus (it is bogus if remote does not close the connection after sending
3514 SILC_TASK_CALLBACK(silc_server_failure_callback)
3516 SilcServerFailureContext f = (SilcServerFailureContext)context;
3518 if (f->sock->protocol) {
3519 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3520 silc_protocol_execute(f->sock->protocol, f->server->timeout_queue, 0, 0);
3526 /* Assembles user list and users mode list from the `channel'. */
3528 void silc_server_get_users_on_channel(SilcServer server,
3529 SilcChannelEntry channel,
3530 SilcBuffer *user_list,
3531 SilcBuffer *mode_list,
3534 SilcChannelClientEntry chl;
3535 SilcHashTableList htl;
3536 SilcBuffer client_id_list;
3537 SilcBuffer client_mode_list;
3539 uint32 list_count = 0;
3541 /* XXX rewrite - this does not support IPv6 based Client ID's. */
3544 silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3545 silc_hash_table_count(channel->user_list));
3547 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3548 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3549 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3550 silc_hash_table_list(channel->user_list, &htl);
3551 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3553 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3554 silc_buffer_put(client_id_list, idp->data, idp->len);
3555 silc_buffer_pull(client_id_list, idp->len);
3556 silc_buffer_free(idp);
3558 /* Client's mode on channel */
3559 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3560 silc_buffer_pull(client_mode_list, 4);
3564 silc_buffer_push(client_id_list,
3565 client_id_list->data - client_id_list->head);
3566 silc_buffer_push(client_mode_list,
3567 client_mode_list->data - client_mode_list->head);
3569 *user_list = client_id_list;
3570 *mode_list = client_mode_list;
3571 *user_count = list_count;
3574 /* Saves users and their modes to the `channel'. */
3576 void silc_server_save_users_on_channel(SilcServer server,
3577 SilcSocketConnection sock,
3578 SilcChannelEntry channel,
3579 SilcClientID *noadd,
3580 SilcBuffer user_list,
3581 SilcBuffer mode_list,
3586 /* Cache the received Client ID's and modes. This cache expires
3587 whenever server sends notify message to channel. It means two things;
3588 some user has joined or leaved the channel. XXX TODO! */
3589 for (i = 0; i < user_count; i++) {
3592 SilcClientID *client_id;
3593 SilcClientEntry client;
3596 SILC_GET16_MSB(idp_len, user_list->data + 2);
3598 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3599 silc_buffer_pull(user_list, idp_len);
3604 SILC_GET32_MSB(mode, mode_list->data);
3605 silc_buffer_pull(mode_list, 4);
3607 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3608 silc_free(client_id);
3612 /* Check if we have this client cached already. */
3613 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3616 client = silc_idlist_find_client_by_id(server->global_list,
3619 /* If router did not find such Client ID in its lists then this must
3620 be bogus client or some router in the net is buggy. */
3621 if (server->server_type == SILC_ROUTER) {
3622 silc_free(client_id);
3626 /* We don't have that client anywhere, add it. The client is added
3627 to global list since server didn't have it in the lists so it must be
3629 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3630 silc_id_dup(client_id, SILC_ID_CLIENT),
3631 sock->user_data, NULL);
3633 silc_free(client_id);
3637 client->data.registered = TRUE;
3640 silc_free(client_id);
3642 if (!silc_server_client_on_channel(client, channel)) {
3643 /* Client was not on the channel, add it. */
3644 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3645 chl->client = client;
3647 chl->channel = channel;
3648 silc_hash_table_add(channel->user_list, chl->client, chl);
3649 silc_hash_table_add(client->channels, chl->channel, chl);
3654 /* Lookups route to the client indicated by the `id_data'. The connection
3655 object and internal data object is returned. Returns NULL if route
3656 could not be found to the client. If the `client_id' is specified then
3657 it is used and the `id_data' is ignored. */
3659 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3660 unsigned char *id_data,
3662 SilcClientID *client_id,
3663 SilcIDListData *idata)
3666 SilcClientEntry client;
3668 SILC_LOG_DEBUG(("Start"));
3670 /* Decode destination Client ID */
3672 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3674 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3678 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3681 /* If the destination belongs to our server we don't have to route
3682 the packet anywhere but to send it to the local destination. */
3683 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3687 if (client && client->data.registered == FALSE)
3690 /* If we are router and the client has router then the client is in
3691 our cell but not directly connected to us. */
3692 if (server->server_type == SILC_ROUTER && client->router) {
3693 /* We are of course in this case the client's router thus the real
3694 "router" of the client is the server who owns the client. Thus
3695 we will send the packet to that server. */
3697 *idata = (SilcIDListData)client->router;
3698 return client->router->connection;
3701 /* Seems that client really is directly connected to us */
3703 *idata = (SilcIDListData)client;
3704 return client->connection;
3707 /* Destination belongs to someone not in this server. If we are normal
3708 server our action is to send the packet to our router. */
3709 if (server->server_type == SILC_SERVER && !server->standalone) {
3712 *idata = (SilcIDListData)server->router;
3713 return server->router->connection;
3716 /* We are router and we will perform route lookup for the destination
3717 and send the packet to fastest route. */
3718 if (server->server_type == SILC_ROUTER && !server->standalone) {
3719 /* Check first that the ID is valid */
3720 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3722 SilcSocketConnection dst_sock;
3724 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3728 *idata = (SilcIDListData)dst_sock->user_data;
3737 /* Encodes and returns channel list of channels the `client' has joined.
3738 Secret channels are not put to the list. */
3740 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3741 SilcClientEntry client)
3743 SilcBuffer buffer = NULL;
3744 SilcChannelEntry channel;
3745 SilcChannelClientEntry chl;
3746 SilcHashTableList htl;
3752 silc_hash_table_list(client->channels, &htl);
3753 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3754 channel = chl->channel;
3756 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3759 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3760 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3761 name_len = strlen(channel->channel_name);
3763 len = 4 + name_len + id_len + 4;
3764 buffer = silc_buffer_realloc(buffer,
3765 (buffer ? (buffer)->truelen + len : len));
3766 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3767 silc_buffer_format(buffer,
3768 SILC_STR_UI_SHORT(name_len),
3769 SILC_STR_UI_XNSTRING(channel->channel_name,
3771 SILC_STR_UI_SHORT(id_len),
3772 SILC_STR_UI_XNSTRING(cid, id_len),
3773 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3775 silc_buffer_pull(buffer, len);
3780 silc_buffer_push(buffer, buffer->data - buffer->head);
3785 /* Finds client entry by Client ID and if it is not found then resolves
3786 it using WHOIS command. */
3788 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3789 SilcClientID *client_id)
3791 SilcClientEntry client;
3793 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3795 client = silc_idlist_find_client_by_id(server->global_list,
3797 if (!client && server->server_type == SILC_ROUTER)
3801 if (!client && server->standalone)
3804 if (!client || !client->nickname || !client->username) {
3805 SilcBuffer buffer, idp;
3807 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3808 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3809 ++server->cmd_ident, 1,
3810 3, idp->data, idp->len);
3811 silc_server_packet_send(server, client ? client->router->connection :
3812 server->router->connection,
3813 SILC_PACKET_COMMAND, 0,
3814 buffer->data, buffer->len, FALSE);
3815 silc_buffer_free(idp);
3816 silc_buffer_free(buffer);
3822 /* A timeout callback for the re-key. We will be the initiator of the
3825 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3827 SilcSocketConnection sock = (SilcSocketConnection)context;
3828 SilcIDListData idata = (SilcIDListData)sock->user_data;
3829 SilcServer server = (SilcServer)idata->rekey->context;
3830 SilcProtocol protocol;
3831 SilcServerRekeyInternalContext *proto_ctx;
3833 SILC_LOG_DEBUG(("Start"));
3835 /* Allocate internal protocol context. This is sent as context
3837 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3838 proto_ctx->server = (void *)server;
3839 proto_ctx->sock = sock;
3840 proto_ctx->responder = FALSE;
3841 proto_ctx->pfs = idata->rekey->pfs;
3843 /* Perform rekey protocol. Will call the final callback after the
3844 protocol is over. */
3845 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3846 &protocol, proto_ctx, silc_server_rekey_final);
3847 sock->protocol = protocol;
3849 /* Run the protocol */
3850 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
3852 /* Re-register re-key timeout */
3853 silc_task_register(server->timeout_queue, sock->sock,
3854 silc_server_rekey_callback,
3855 context, idata->rekey->timeout, 0,
3856 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3859 /* The final callback for the REKEY protocol. This will actually take the
3860 new key material into use. */
3862 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3864 SilcProtocol protocol = (SilcProtocol)context;
3865 SilcServerRekeyInternalContext *ctx =
3866 (SilcServerRekeyInternalContext *)protocol->context;
3867 SilcServer server = (SilcServer)ctx->server;
3868 SilcSocketConnection sock = ctx->sock;
3870 SILC_LOG_DEBUG(("Start"));
3872 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3873 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3874 /* Error occured during protocol */
3875 silc_protocol_cancel(protocol, server->timeout_queue);
3876 silc_protocol_free(protocol);
3877 sock->protocol = NULL;
3879 silc_packet_context_free(ctx->packet);
3881 silc_ske_free(ctx->ske);
3887 silc_protocol_free(protocol);
3888 sock->protocol = NULL;
3890 silc_packet_context_free(ctx->packet);
3892 silc_ske_free(ctx->ske);