5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 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 sock->type = ctx->conn_type;
1228 switch(sock->type) {
1229 case SILC_SOCKET_TYPE_CLIENT:
1231 SilcClientEntry client;
1233 SILC_LOG_DEBUG(("Remote host is client"));
1234 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1237 /* Add the client to the client ID cache. The nickname and Client ID
1238 and other information is created after we have received NEW_CLIENT
1239 packet from client. */
1240 client = silc_idlist_add_client(server->local_list,
1241 NULL, NULL, NULL, NULL, NULL, sock);
1243 SILC_LOG_ERROR(("Could not add new client to cache"));
1244 silc_free(sock->user_data);
1249 server->stat.my_clients++;
1250 server->stat.clients++;
1251 if (server->server_type == SILC_ROUTER)
1252 server->stat.cell_clients++;
1254 id_entry = (void *)client;
1257 case SILC_SOCKET_TYPE_SERVER:
1258 case SILC_SOCKET_TYPE_ROUTER:
1260 SilcServerEntry new_server;
1261 SilcServerConfigSectionServerConnection *conn =
1262 sock->type == SILC_SOCKET_TYPE_SERVER ? ctx->sconfig : ctx->rconfig;
1264 SILC_LOG_DEBUG(("Remote host is %s",
1265 sock->type == SILC_SOCKET_TYPE_SERVER ?
1266 "server" : "router"));
1267 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1268 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1269 "server" : "router"));
1271 /* Add the server into server cache. The server name and Server ID
1272 is updated after we have received NEW_SERVER packet from the
1273 server. We mark ourselves as router for this server if we really
1276 silc_idlist_add_server(server->local_list, NULL,
1277 sock->type == SILC_SOCKET_TYPE_SERVER ?
1278 SILC_SERVER : SILC_ROUTER, NULL,
1279 sock->type == SILC_SOCKET_TYPE_SERVER ?
1280 server->id_entry : NULL, sock);
1282 SILC_LOG_ERROR(("Could not add new server to cache"));
1283 silc_free(sock->user_data);
1288 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1289 server->stat.my_servers++;
1291 server->stat.my_routers++;
1292 server->stat.servers++;
1294 id_entry = (void *)new_server;
1296 /* Check whether this connection is to be our primary router connection
1297 if we dont' already have the primary route. */
1298 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1299 if (silc_server_config_is_primary_route(server->config) &&
1303 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1304 server->standalone = FALSE;
1305 if (!server->id_entry->router) {
1306 server->id_entry->router = id_entry;
1307 server->router = id_entry;
1317 /* Add the common data structure to the ID entry. */
1319 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1321 /* Add to sockets internal pointer for fast referencing */
1322 silc_free(sock->user_data);
1323 sock->user_data = id_entry;
1325 /* Connection has been fully established now. Everything is ok. */
1326 SILC_LOG_DEBUG(("New connection authenticated"));
1328 /* Perform keepalive. The `hb_context' will be freed automatically
1329 when finally calling the silc_socket_free function. XXX hardcoded
1331 hb_context = silc_calloc(1, sizeof(*hb_context));
1332 hb_context->server = server;
1333 silc_socket_set_heartbeat(sock, 600, hb_context,
1334 silc_server_perform_heartbeat,
1335 server->timeout_queue);
1337 silc_task_unregister_by_callback(server->timeout_queue,
1338 silc_server_failure_callback);
1339 silc_protocol_free(protocol);
1341 silc_packet_context_free(ctx->packet);
1343 silc_ske_free(ctx->ske);
1345 silc_free(ctx->dest_id);
1347 sock->protocol = NULL;
1350 /* This function is used to read packets from network and send packets to
1351 network. This is usually a generic task. */
1353 SILC_TASK_CALLBACK(silc_server_packet_process)
1355 SilcServer server = (SilcServer)context;
1356 SilcSocketConnection sock = server->sockets[fd];
1357 SilcIDListData idata;
1358 SilcCipher cipher = NULL;
1359 SilcHmac hmac = NULL;
1365 SILC_LOG_DEBUG(("Processing packet"));
1367 /* Packet sending */
1369 if (type == SILC_TASK_WRITE) {
1370 /* Do not send data to disconnected connection */
1371 if (SILC_IS_DISCONNECTED(sock))
1374 server->stat.packets_sent++;
1376 if (sock->outbuf->data - sock->outbuf->head)
1377 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1379 /* Send the packet */
1380 ret = silc_packet_send(sock, TRUE);
1382 /* If returned -2 could not write to connection now, will do
1390 /* The packet has been sent and now it is time to set the connection
1391 back to only for input. When there is again some outgoing data
1392 available for this connection it will be set for output as well.
1393 This call clears the output setting and sets it only for input. */
1394 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1395 SILC_UNSET_OUTBUF_PENDING(sock);
1397 silc_buffer_clear(sock->outbuf);
1401 /* Packet receiving */
1403 /* Read some data from connection */
1404 ret = silc_packet_receive(sock);
1410 SILC_LOG_DEBUG(("Read EOF"));
1412 /* If connection is disconnecting already we will finally
1413 close the connection */
1414 if (SILC_IS_DISCONNECTING(sock)) {
1415 if (sock->user_data)
1416 silc_server_free_sock_user_data(server, sock);
1417 silc_server_close_connection(server, sock);
1421 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1422 SILC_SET_DISCONNECTING(sock);
1424 /* If the closed connection was our primary router connection the
1425 start re-connecting phase. */
1426 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1427 sock == server->router->connection)
1428 silc_task_register(server->timeout_queue, 0,
1429 silc_server_connect_to_router,
1432 SILC_TASK_PRI_NORMAL);
1434 if (sock->user_data)
1435 silc_server_free_sock_user_data(server, sock);
1436 silc_server_close_connection(server, sock);
1440 /* If connection is disconnecting or disconnected we will ignore
1442 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1443 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1447 server->stat.packets_received++;
1449 /* Get keys and stuff from ID entry */
1450 idata = (SilcIDListData)sock->user_data;
1452 idata->last_receive = time(NULL);
1453 cipher = idata->receive_key;
1454 hmac = idata->hmac_receive;
1457 /* Process the packet. This will call the parser that will then
1458 decrypt and parse the packet. */
1459 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1463 /* Callback function that the silc_packet_decrypt will call to make the
1464 decision whether the packet is normal or special packet. We will
1465 return TRUE if it is normal and FALSE if it is special */
1467 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1469 SilcPacketContext *packet,
1472 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1473 SilcServer server = (SilcServer)parse_ctx->context;
1475 /* Packet is normal packet, if:
1477 1) packet is private message packet and does not have private key set
1478 2) is other packet than channel message packet
1479 3) is channel message packet and remote is router and we are router
1481 all other packets are special packets
1484 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1485 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1488 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1489 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1490 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1491 server->server_type == SILC_ROUTER))
1497 /* Parses whole packet, received earlier. */
1499 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1501 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1502 SilcServer server = (SilcServer)parse_ctx->context;
1503 SilcSocketConnection sock = parse_ctx->sock;
1504 SilcPacketContext *packet = parse_ctx->packet;
1505 SilcIDListData idata = (SilcIDListData)sock->user_data;
1508 SILC_LOG_DEBUG(("Start"));
1510 /* Decrypt the received packet */
1511 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1512 idata ? idata->hmac_receive : NULL,
1513 packet->buffer, packet,
1514 silc_server_packet_decrypt_check, parse_ctx);
1519 /* Parse the packet. Packet type is returned. */
1520 ret = silc_packet_parse(packet);
1522 /* Parse the packet header in special way as this is "special"
1524 ret = silc_packet_parse_special(packet);
1527 if (ret == SILC_PACKET_NONE)
1530 /* Check that the the current client ID is same as in the client's packet. */
1531 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1532 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1533 if (client && client->id) {
1534 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1535 packet->src_id_type);
1536 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1544 if (server->server_type == SILC_ROUTER) {
1545 /* Route the packet if it is not destined to us. Other ID types but
1546 server are handled separately after processing them. */
1547 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1548 packet->dst_id_type == SILC_ID_SERVER &&
1549 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1550 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1552 /* Route the packet to fastest route for the destination ID */
1553 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1554 packet->dst_id_type);
1557 silc_server_packet_route(server,
1558 silc_server_route_get(server, id,
1559 packet->dst_id_type),
1566 /* Parse the incoming packet type */
1567 silc_server_packet_parse_type(server, sock, packet);
1569 if (server->server_type == SILC_ROUTER) {
1570 /* Broadcast packet if it is marked as broadcast packet and it is
1571 originated from router and we are router. */
1572 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1573 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1574 !server->standalone) {
1575 silc_server_packet_broadcast(server, server->router->connection, packet);
1580 /* silc_buffer_clear(sock->inbuf); */
1581 silc_packet_context_free(packet);
1582 silc_free(parse_ctx);
1585 /* Parser callback called by silc_packet_receive_process. This merely
1586 registers timeout that will handle the actual parsing when appropriate. */
1588 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1590 SilcServer server = (SilcServer)parser_context->context;
1591 SilcSocketConnection sock = parser_context->sock;
1593 switch (sock->type) {
1594 case SILC_SOCKET_TYPE_UNKNOWN:
1595 case SILC_SOCKET_TYPE_CLIENT:
1596 /* Parse the packet with timeout */
1597 silc_task_register(server->timeout_queue, sock->sock,
1598 silc_server_packet_parse_real,
1599 (void *)parser_context, 0, 100000,
1601 SILC_TASK_PRI_NORMAL);
1603 case SILC_SOCKET_TYPE_SERVER:
1604 case SILC_SOCKET_TYPE_ROUTER:
1605 /* Packets from servers are parsed as soon as possible */
1606 silc_task_register(server->timeout_queue, sock->sock,
1607 silc_server_packet_parse_real,
1608 (void *)parser_context, 0, 1,
1610 SILC_TASK_PRI_NORMAL);
1617 /* Parses the packet type and calls what ever routines the packet type
1618 requires. This is done for all incoming packets. */
1620 void silc_server_packet_parse_type(SilcServer server,
1621 SilcSocketConnection sock,
1622 SilcPacketContext *packet)
1624 SilcPacketType type = packet->type;
1626 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1628 /* Parse the packet type */
1630 case SILC_PACKET_DISCONNECT:
1631 SILC_LOG_DEBUG(("Disconnect packet"));
1632 if (packet->flags & SILC_PACKET_FLAG_LIST)
1636 case SILC_PACKET_SUCCESS:
1638 * Success received for something. For now we can have only
1639 * one protocol for connection executing at once hence this
1640 * success message is for whatever protocol is executing currently.
1642 SILC_LOG_DEBUG(("Success packet"));
1643 if (packet->flags & SILC_PACKET_FLAG_LIST)
1646 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1649 case SILC_PACKET_FAILURE:
1651 * Failure received for something. For now we can have only
1652 * one protocol for connection executing at once hence this
1653 * failure message is for whatever protocol is executing currently.
1655 SILC_LOG_DEBUG(("Failure packet"));
1656 if (packet->flags & SILC_PACKET_FLAG_LIST)
1658 if (sock->protocol) {
1659 SilcServerFailureContext f;
1660 f = silc_calloc(1, sizeof(*f));
1664 /* We will wait 5 seconds to process this failure packet */
1665 silc_task_register(server->timeout_queue, sock->sock,
1666 silc_server_failure_callback, (void *)f, 5, 0,
1667 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1671 case SILC_PACKET_REJECT:
1672 SILC_LOG_DEBUG(("Reject packet"));
1673 if (packet->flags & SILC_PACKET_FLAG_LIST)
1678 case SILC_PACKET_NOTIFY:
1680 * Received notify packet. Server can receive notify packets from
1681 * router. Server then relays the notify messages to clients if needed.
1683 SILC_LOG_DEBUG(("Notify packet"));
1684 if (packet->flags & SILC_PACKET_FLAG_LIST)
1685 silc_server_notify_list(server, sock, packet);
1687 silc_server_notify(server, sock, packet);
1693 case SILC_PACKET_CHANNEL_MESSAGE:
1695 * Received channel message. Channel messages are special packets
1696 * (although probably most common ones) thus they are handled
1699 SILC_LOG_DEBUG(("Channel Message packet"));
1700 if (packet->flags & SILC_PACKET_FLAG_LIST)
1702 silc_server_channel_message(server, sock, packet);
1705 case SILC_PACKET_CHANNEL_KEY:
1707 * Received key for channel. As channels are created by the router
1708 * the keys are as well. We will distribute the key to all of our
1709 * locally connected clients on the particular channel. Router
1710 * never receives this channel and thus is ignored.
1712 SILC_LOG_DEBUG(("Channel Key packet"));
1713 if (packet->flags & SILC_PACKET_FLAG_LIST)
1715 silc_server_channel_key(server, sock, packet);
1721 case SILC_PACKET_COMMAND:
1723 * Recived command. Processes the command request and allocates the
1724 * command context and calls the command.
1726 SILC_LOG_DEBUG(("Command packet"));
1727 if (packet->flags & SILC_PACKET_FLAG_LIST)
1729 silc_server_command_process(server, sock, packet);
1732 case SILC_PACKET_COMMAND_REPLY:
1734 * Received command reply packet. Received command reply to command. It
1735 * may be reply to command sent by us or reply to command sent by client
1736 * that we've routed further.
1738 SILC_LOG_DEBUG(("Command Reply packet"));
1739 if (packet->flags & SILC_PACKET_FLAG_LIST)
1741 silc_server_command_reply(server, sock, packet);
1745 * Private Message packets
1747 case SILC_PACKET_PRIVATE_MESSAGE:
1749 * Received private message packet. The packet is coming from either
1752 SILC_LOG_DEBUG(("Private Message packet"));
1753 if (packet->flags & SILC_PACKET_FLAG_LIST)
1755 silc_server_private_message(server, sock, packet);
1758 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1760 * Private message key packet.
1762 if (packet->flags & SILC_PACKET_FLAG_LIST)
1764 silc_server_private_message_key(server, sock, packet);
1768 * Key Exchange protocol packets
1770 case SILC_PACKET_KEY_EXCHANGE:
1771 SILC_LOG_DEBUG(("KE packet"));
1772 if (packet->flags & SILC_PACKET_FLAG_LIST)
1775 if (sock->protocol && sock->protocol->protocol &&
1776 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1778 SilcServerKEInternalContext *proto_ctx =
1779 (SilcServerKEInternalContext *)sock->protocol->context;
1781 proto_ctx->packet = silc_packet_context_dup(packet);
1783 /* Let the protocol handle the packet */
1784 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 100000);
1786 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1787 "protocol active, packet dropped."));
1789 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1793 case SILC_PACKET_KEY_EXCHANGE_1:
1794 SILC_LOG_DEBUG(("KE 1 packet"));
1795 if (packet->flags & SILC_PACKET_FLAG_LIST)
1798 if (sock->protocol && sock->protocol->protocol &&
1799 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1800 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1802 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1803 SilcServerRekeyInternalContext *proto_ctx =
1804 (SilcServerRekeyInternalContext *)sock->protocol->context;
1806 if (proto_ctx->packet)
1807 silc_packet_context_free(proto_ctx->packet);
1809 proto_ctx->packet = silc_packet_context_dup(packet);
1811 /* Let the protocol handle the packet */
1812 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1814 SilcServerKEInternalContext *proto_ctx =
1815 (SilcServerKEInternalContext *)sock->protocol->context;
1817 if (proto_ctx->packet)
1818 silc_packet_context_free(proto_ctx->packet);
1820 proto_ctx->packet = silc_packet_context_dup(packet);
1821 proto_ctx->dest_id_type = packet->src_id_type;
1822 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1823 packet->src_id_type);
1824 if (!proto_ctx->dest_id)
1827 /* Let the protocol handle the packet */
1828 silc_protocol_execute(sock->protocol, server->timeout_queue,
1832 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1833 "protocol active, packet dropped."));
1837 case SILC_PACKET_KEY_EXCHANGE_2:
1838 SILC_LOG_DEBUG(("KE 2 packet"));
1839 if (packet->flags & SILC_PACKET_FLAG_LIST)
1842 if (sock->protocol && sock->protocol->protocol &&
1843 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1844 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1846 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1847 SilcServerRekeyInternalContext *proto_ctx =
1848 (SilcServerRekeyInternalContext *)sock->protocol->context;
1850 if (proto_ctx->packet)
1851 silc_packet_context_free(proto_ctx->packet);
1853 proto_ctx->packet = silc_packet_context_dup(packet);
1855 /* Let the protocol handle the packet */
1856 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1858 SilcServerKEInternalContext *proto_ctx =
1859 (SilcServerKEInternalContext *)sock->protocol->context;
1861 if (proto_ctx->packet)
1862 silc_packet_context_free(proto_ctx->packet);
1864 proto_ctx->packet = silc_packet_context_dup(packet);
1865 proto_ctx->dest_id_type = packet->src_id_type;
1866 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1867 packet->src_id_type);
1868 if (!proto_ctx->dest_id)
1871 /* Let the protocol handle the packet */
1872 silc_protocol_execute(sock->protocol, server->timeout_queue,
1876 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1877 "protocol active, packet dropped."));
1881 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1883 * Connection authentication request packet. When we receive this packet
1884 * we will send to the other end information about our mandatory
1885 * authentication method for the connection. This packet maybe received
1888 SILC_LOG_DEBUG(("Connection authentication request packet"));
1889 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 silc_server_connection_auth_request(server, sock, packet);
1895 * Connection Authentication protocol packets
1897 case SILC_PACKET_CONNECTION_AUTH:
1898 /* Start of the authentication protocol. We receive here the
1899 authentication data and will verify it. */
1900 SILC_LOG_DEBUG(("Connection auth packet"));
1901 if (packet->flags & SILC_PACKET_FLAG_LIST)
1904 if (sock->protocol && sock->protocol->protocol->type
1905 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1907 SilcServerConnAuthInternalContext *proto_ctx =
1908 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1910 proto_ctx->packet = silc_packet_context_dup(packet);
1912 /* Let the protocol handle the packet */
1913 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1915 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1916 "protocol active, packet dropped."));
1920 case SILC_PACKET_NEW_ID:
1922 * Received New ID packet. This includes some new ID that has been
1923 * created. It may be for client, server or channel. This is the way
1924 * to distribute information about new registered entities in the
1927 SILC_LOG_DEBUG(("New ID packet"));
1928 if (packet->flags & SILC_PACKET_FLAG_LIST)
1929 silc_server_new_id_list(server, sock, packet);
1931 silc_server_new_id(server, sock, packet);
1934 case SILC_PACKET_NEW_CLIENT:
1936 * Received new client packet. This includes client information that
1937 * we will use to create initial client ID. After creating new
1938 * ID we will send it to the client.
1940 SILC_LOG_DEBUG(("New Client packet"));
1941 if (packet->flags & SILC_PACKET_FLAG_LIST)
1943 silc_server_new_client(server, sock, packet);
1946 case SILC_PACKET_NEW_SERVER:
1948 * Received new server packet. This includes Server ID and some other
1949 * information that we may save. This is received after server has
1952 SILC_LOG_DEBUG(("New Server packet"));
1953 if (packet->flags & SILC_PACKET_FLAG_LIST)
1955 silc_server_new_server(server, sock, packet);
1958 case SILC_PACKET_NEW_CHANNEL:
1960 * Received new channel packet. Information about new channel in the
1961 * network are distributed using this packet.
1963 SILC_LOG_DEBUG(("New Channel packet"));
1964 if (packet->flags & SILC_PACKET_FLAG_LIST)
1965 silc_server_new_channel_list(server, sock, packet);
1967 silc_server_new_channel(server, sock, packet);
1970 case SILC_PACKET_HEARTBEAT:
1972 * Received heartbeat.
1974 SILC_LOG_DEBUG(("Heartbeat packet"));
1975 if (packet->flags & SILC_PACKET_FLAG_LIST)
1979 case SILC_PACKET_KEY_AGREEMENT:
1981 * Received heartbeat.
1983 SILC_LOG_DEBUG(("Key agreement packet"));
1984 if (packet->flags & SILC_PACKET_FLAG_LIST)
1986 silc_server_key_agreement(server, sock, packet);
1989 case SILC_PACKET_REKEY:
1991 * Received re-key packet. The sender wants to regenerate the session
1994 SILC_LOG_DEBUG(("Re-key packet"));
1995 if (packet->flags & SILC_PACKET_FLAG_LIST)
1997 silc_server_rekey(server, sock, packet);
2000 case SILC_PACKET_REKEY_DONE:
2002 * The re-key is done.
2004 SILC_LOG_DEBUG(("Re-key done packet"));
2005 if (packet->flags & SILC_PACKET_FLAG_LIST)
2008 if (sock->protocol && sock->protocol->protocol &&
2009 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2011 SilcServerRekeyInternalContext *proto_ctx =
2012 (SilcServerRekeyInternalContext *)sock->protocol->context;
2014 if (proto_ctx->packet)
2015 silc_packet_context_free(proto_ctx->packet);
2017 proto_ctx->packet = silc_packet_context_dup(packet);
2019 /* Let the protocol handle the packet */
2020 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
2022 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2023 "protocol active, packet dropped."));
2028 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2034 /* Creates connection to a remote router. */
2036 void silc_server_create_connection(SilcServer server,
2037 char *remote_host, uint32 port)
2039 SilcServerConnection sconn;
2041 /* Allocate connection object for hold connection specific stuff. */
2042 sconn = silc_calloc(1, sizeof(*sconn));
2043 sconn->server = server;
2044 sconn->remote_host = strdup(remote_host);
2045 sconn->remote_port = port;
2047 silc_task_register(server->timeout_queue, 0,
2048 silc_server_connect_router,
2049 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2050 SILC_TASK_PRI_NORMAL);
2053 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2055 silc_socket_free((SilcSocketConnection)context);
2058 /* Closes connection to socket connection */
2060 void silc_server_close_connection(SilcServer server,
2061 SilcSocketConnection sock)
2063 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2065 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2066 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2067 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2068 "Router"), sock->sock));
2070 /* If any protocol is active cancel its execution */
2071 if (sock->protocol) {
2072 silc_protocol_cancel(sock->protocol, server->timeout_queue);
2073 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2074 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2075 sock->protocol = NULL;
2078 /* We won't listen for this connection anymore */
2079 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2081 /* Unregister all tasks */
2082 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2083 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2085 /* Close the actual connection */
2086 silc_net_close_connection(sock->sock);
2087 server->sockets[sock->sock] = NULL;
2089 silc_task_register(server->timeout_queue, 0,
2090 silc_server_close_connection_final,
2091 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2092 SILC_TASK_PRI_NORMAL);
2095 /* Sends disconnect message to remote connection and disconnects the
2098 void silc_server_disconnect_remote(SilcServer server,
2099 SilcSocketConnection sock,
2100 const char *fmt, ...)
2103 unsigned char buf[4096];
2108 memset(buf, 0, sizeof(buf));
2110 vsprintf(buf, fmt, ap);
2113 SILC_LOG_DEBUG(("Disconnecting remote host"));
2115 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2117 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2118 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2119 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2122 /* Notify remote end that the conversation is over. The notify message
2123 is tried to be sent immediately. */
2124 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2125 buf, strlen(buf), TRUE);
2127 /* Mark the connection to be disconnected */
2128 SILC_SET_DISCONNECTED(sock);
2129 silc_server_close_connection(server, sock);
2134 SilcClientEntry client;
2135 } *FreeClientInternal;
2137 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2139 FreeClientInternal i = (FreeClientInternal)context;
2141 silc_idlist_del_data(i->client);
2142 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2146 /* Frees client data and notifies about client's signoff. */
2148 void silc_server_free_client_data(SilcServer server,
2149 SilcSocketConnection sock,
2150 SilcClientEntry client,
2154 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2156 /* If there is pending outgoing data for the client then purge it
2157 to the network before removing the client entry. */
2158 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2159 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2160 server->stat.packets_sent++;
2162 if (sock->outbuf->data - sock->outbuf->head)
2163 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2165 silc_packet_send(sock, TRUE);
2167 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2168 SILC_UNSET_OUTBUF_PENDING(sock);
2169 silc_buffer_clear(sock->outbuf);
2172 /* Send SIGNOFF notify to routers. */
2173 if (notify && !server->standalone && server->router)
2174 silc_server_send_notify_signoff(server, server->router->connection,
2175 server->server_type == SILC_SERVER ?
2176 FALSE : TRUE, client->id, signoff);
2178 /* Remove client from all channels */
2180 silc_server_remove_from_channels(server, NULL, client,
2181 TRUE, signoff, TRUE);
2183 silc_server_remove_from_channels(server, NULL, client,
2184 FALSE, NULL, FALSE);
2186 /* We will not delete the client entry right away. We will take it
2187 into history (for WHOWAS command) for 5 minutes */
2190 silc_task_register(server->timeout_queue, 0,
2191 silc_server_free_client_data_timeout,
2193 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2194 client->data.registered = FALSE;
2196 /* Free the client entry and everything in it */
2197 server->stat.my_clients--;
2198 server->stat.clients--;
2199 if (server->server_type == SILC_ROUTER)
2200 server->stat.cell_clients--;
2203 /* Frees user_data pointer from socket connection object. This also sends
2204 appropriate notify packets to the network to inform about leaving
2207 void silc_server_free_sock_user_data(SilcServer server,
2208 SilcSocketConnection sock)
2210 SILC_LOG_DEBUG(("Start"));
2212 switch(sock->type) {
2213 case SILC_SOCKET_TYPE_CLIENT:
2215 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2216 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2219 case SILC_SOCKET_TYPE_SERVER:
2220 case SILC_SOCKET_TYPE_ROUTER:
2222 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2224 /* Free all client entries that this server owns as they will
2225 become invalid now as well. */
2227 silc_server_remove_clients_by_server(server, user_data, TRUE);
2229 /* If this was our primary router connection then we're lost to
2230 the outside world. */
2231 if (server->router == user_data) {
2232 server->id_entry->router = NULL;
2233 server->router = NULL;
2234 server->standalone = TRUE;
2237 /* Free the server entry */
2238 silc_idlist_del_data(user_data);
2239 silc_idlist_del_server(server->local_list, user_data);
2240 server->stat.my_servers--;
2241 server->stat.servers--;
2242 if (server->server_type == SILC_ROUTER)
2243 server->stat.cell_servers--;
2248 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2250 silc_idlist_del_data(user_data);
2251 silc_free(user_data);
2256 sock->user_data = NULL;
2259 /* This function is used to remove all client entries by the server `entry'.
2260 This is called when the connection is lost to the server. In this case
2261 we must invalidate all the client entries owned by the server `entry'.
2262 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2263 distributed to our local clients. */
2265 int silc_server_remove_clients_by_server(SilcServer server,
2266 SilcServerEntry entry,
2269 SilcIDCacheList list = NULL;
2270 SilcIDCacheEntry id_cache = NULL;
2271 SilcClientEntry client = NULL;
2273 SilcClientEntry *clients = NULL;
2274 uint32 clients_c = 0;
2275 unsigned char **argv = NULL;
2276 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2279 SILC_LOG_DEBUG(("Start"));
2281 if (server_signoff) {
2282 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2283 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2284 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2285 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2286 argv[argc] = idp->data;
2287 argv_lens[argc] = idp->len;
2288 argv_types[argc] = argc + 1;
2290 silc_buffer_free(idp);
2293 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2295 if (silc_idcache_list_first(list, &id_cache)) {
2297 client = (SilcClientEntry)id_cache->context;
2298 if (client->data.registered == FALSE) {
2299 if (!silc_idcache_list_next(list, &id_cache))
2305 if (client->router != entry) {
2306 if (server_signoff && client->connection) {
2307 clients = silc_realloc(clients,
2308 sizeof(*clients) * (clients_c + 1));
2309 clients[clients_c] = client;
2313 if (!silc_idcache_list_next(list, &id_cache))
2319 if (server_signoff) {
2320 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2321 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2322 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2324 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2326 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2327 memcpy(argv[argc], idp->data, idp->len);
2328 argv_lens[argc] = idp->len;
2329 argv_types[argc] = argc + 1;
2331 silc_buffer_free(idp);
2334 /* Remove the client entry */
2335 silc_server_remove_from_channels(server, NULL, client, FALSE,
2337 silc_idlist_del_client(server->local_list, client);
2339 if (!silc_idcache_list_next(list, &id_cache))
2343 silc_idcache_list_free(list);
2346 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2348 if (silc_idcache_list_first(list, &id_cache)) {
2350 client = (SilcClientEntry)id_cache->context;
2351 if (client->data.registered == FALSE) {
2352 if (!silc_idcache_list_next(list, &id_cache))
2358 if (client->router != entry) {
2359 if (server_signoff && client->connection) {
2360 clients = silc_realloc(clients,
2361 sizeof(*clients) * (clients_c + 1));
2362 clients[clients_c] = client;
2366 if (!silc_idcache_list_next(list, &id_cache))
2372 if (server_signoff) {
2373 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2374 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2375 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2377 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2379 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2380 memcpy(argv[argc], idp->data, idp->len);
2381 argv_lens[argc] = idp->len;
2382 argv_types[argc] = argc + 1;
2384 silc_buffer_free(idp);
2387 /* Remove the client entry */
2388 silc_server_remove_from_channels(server, NULL, client, FALSE,
2390 silc_idlist_del_client(server->global_list, client);
2392 if (!silc_idcache_list_next(list, &id_cache))
2396 silc_idcache_list_free(list);
2399 /* Send the SERVER_SIGNOFF notify */
2400 if (server_signoff) {
2403 /* Send SERVER_SIGNOFF notify to our primary router */
2404 if (!server->standalone && server->router &&
2405 server->router != entry) {
2406 args = silc_argument_payload_encode(1, argv, argv_lens,
2408 silc_server_send_notify_args(server,
2409 server->router->connection,
2410 server->server_type == SILC_SERVER ?
2412 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2414 silc_buffer_free(args);
2417 args = silc_argument_payload_encode(argc, argv, argv_lens,
2419 /* Send to local clients */
2420 for (i = 0; i < clients_c; i++) {
2421 silc_server_send_notify_args(server, clients[i]->connection,
2422 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2427 silc_buffer_free(args);
2429 silc_free(argv_lens);
2430 silc_free(argv_types);
2436 /* Checks whether given channel has global users. If it does this returns
2437 TRUE and FALSE if there is only locally connected clients on the channel. */
2439 int silc_server_channel_has_global(SilcChannelEntry channel)
2441 SilcChannelClientEntry chl;
2442 SilcHashTableList htl;
2444 silc_hash_table_list(channel->user_list, &htl);
2445 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2446 if (chl->client->router)
2453 /* Checks whether given channel has locally connected users. If it does this
2454 returns TRUE and FALSE if there is not one locally connected client. */
2456 int silc_server_channel_has_local(SilcChannelEntry channel)
2458 SilcChannelClientEntry chl;
2459 SilcHashTableList htl;
2461 silc_hash_table_list(channel->user_list, &htl);
2462 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2463 if (!chl->client->router)
2470 /* Removes client from all channels it has joined. This is used when client
2471 connection is disconnected. If the client on a channel is last, the
2472 channel is removed as well. This sends the SIGNOFF notify types. */
2474 void silc_server_remove_from_channels(SilcServer server,
2475 SilcSocketConnection sock,
2476 SilcClientEntry client,
2478 char *signoff_message,
2481 SilcChannelEntry channel;
2482 SilcChannelClientEntry chl;
2483 SilcHashTableList htl;
2486 SILC_LOG_DEBUG(("Start"));
2488 if (!client || !client->id)
2491 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2493 /* Remove the client from all channels. The client is removed from
2494 the channels' user list. */
2495 silc_hash_table_list(client->channels, &htl);
2496 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2497 channel = chl->channel;
2499 /* Remove channel from client's channel list */
2500 silc_hash_table_del(client->channels, channel);
2502 /* Remove channel if there is no users anymore */
2503 if (server->server_type == SILC_ROUTER &&
2504 silc_hash_table_count(channel->user_list) < 2) {
2506 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2507 if (!silc_idlist_del_channel(server->local_list, channel))
2508 silc_idlist_del_channel(server->global_list, channel);
2509 server->stat.my_channels--;
2513 /* Remove client from channel's client list */
2514 silc_hash_table_del(channel->user_list, chl->client);
2516 server->stat.my_chanclients--;
2518 /* If there is no global users on the channel anymore mark the channel
2519 as local channel. */
2520 if (server->server_type == SILC_SERVER &&
2521 !silc_server_channel_has_global(channel))
2522 channel->global_users = FALSE;
2524 /* If there is not at least one local user on the channel then we don't
2525 need the channel entry anymore, we can remove it safely. */
2526 if (server->server_type == SILC_SERVER &&
2527 !silc_server_channel_has_local(channel)) {
2528 /* Notify about leaving client if this channel has global users. */
2529 if (notify && channel->global_users)
2530 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2531 SILC_NOTIFY_TYPE_SIGNOFF,
2532 signoff_message ? 2 : 1,
2533 clidp->data, clidp->len,
2534 signoff_message, signoff_message ?
2535 strlen(signoff_message) : 0);
2538 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2540 if (channel->founder_key) {
2541 /* The founder auth data exists, do not remove the channel entry */
2542 SilcChannelClientEntry chl2;
2543 SilcHashTableList htl2;
2547 silc_hash_table_list(channel->user_list, &htl2);
2548 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2549 silc_hash_table_del(chl2->client->channels, channel);
2550 silc_hash_table_del(channel->user_list, chl2->client);
2556 /* Remove the channel entry */
2557 if (!silc_idlist_del_channel(server->local_list, channel))
2558 silc_idlist_del_channel(server->global_list, channel);
2559 server->stat.my_channels--;
2563 /* Send notify to channel about client leaving SILC and thus
2564 the entire channel. */
2566 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2567 SILC_NOTIFY_TYPE_SIGNOFF,
2568 signoff_message ? 2 : 1,
2569 clidp->data, clidp->len,
2570 signoff_message, signoff_message ?
2571 strlen(signoff_message) : 0);
2573 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2574 /* Re-generate channel key */
2575 silc_server_create_channel_key(server, channel, 0);
2577 /* Send the channel key to the channel. The key of course is not sent
2578 to the client who was removed from the channel. */
2579 silc_server_send_channel_key(server, client->connection, channel,
2580 server->server_type == SILC_ROUTER ?
2581 FALSE : !server->standalone);
2585 silc_buffer_free(clidp);
2588 /* Removes client from one channel. This is used for example when client
2589 calls LEAVE command to remove itself from the channel. Returns TRUE
2590 if channel still exists and FALSE if the channel is removed when
2591 last client leaves the channel. If `notify' is FALSE notify messages
2594 int silc_server_remove_from_one_channel(SilcServer server,
2595 SilcSocketConnection sock,
2596 SilcChannelEntry channel,
2597 SilcClientEntry client,
2600 SilcChannelClientEntry chl;
2603 SILC_LOG_DEBUG(("Start"));
2605 /* Get the entry to the channel, if this client is not on the channel
2607 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2610 /* Remove the client from the channel. The client is removed from
2611 the channel's user list. */
2613 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2615 /* Remove channel from client's channel list */
2616 silc_hash_table_del(client->channels, chl->channel);
2618 /* Remove channel if there is no users anymore */
2619 if (server->server_type == SILC_ROUTER &&
2620 silc_hash_table_count(channel->user_list) < 2) {
2622 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2623 if (!silc_idlist_del_channel(server->local_list, channel))
2624 silc_idlist_del_channel(server->global_list, channel);
2625 silc_buffer_free(clidp);
2626 server->stat.my_channels--;
2630 /* Remove client from channel's client list */
2631 silc_hash_table_del(channel->user_list, chl->client);
2633 server->stat.my_chanclients--;
2635 /* If there is no global users on the channel anymore mark the channel
2636 as local channel. */
2637 if (server->server_type == SILC_SERVER &&
2638 !silc_server_channel_has_global(channel))
2639 channel->global_users = FALSE;
2641 /* If there is not at least one local user on the channel then we don't
2642 need the channel entry anymore, we can remove it safely. */
2643 if (server->server_type == SILC_SERVER &&
2644 !silc_server_channel_has_local(channel)) {
2645 /* Notify about leaving client if this channel has global users. */
2646 if (notify && channel->global_users)
2647 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2648 SILC_NOTIFY_TYPE_LEAVE, 1,
2649 clidp->data, clidp->len);
2651 silc_buffer_free(clidp);
2654 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2656 if (channel->founder_key) {
2657 /* The founder auth data exists, do not remove the channel entry */
2658 SilcChannelClientEntry chl2;
2659 SilcHashTableList htl2;
2663 silc_hash_table_list(channel->user_list, &htl2);
2664 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2665 silc_hash_table_del(chl2->client->channels, channel);
2666 silc_hash_table_del(channel->user_list, chl2->client);
2672 /* Remove the channel entry */
2673 if (!silc_idlist_del_channel(server->local_list, channel))
2674 silc_idlist_del_channel(server->global_list, channel);
2675 server->stat.my_channels--;
2679 /* Send notify to channel about client leaving the channel */
2681 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2682 SILC_NOTIFY_TYPE_LEAVE, 1,
2683 clidp->data, clidp->len);
2685 silc_buffer_free(clidp);
2689 /* Returns TRUE if the given client is on the channel. FALSE if not.
2690 This works because we assure that the user list on the channel is
2691 always in up to date thus we can only check the channel list from
2692 `client' which is faster than checking the user list from `channel'. */
2694 int silc_server_client_on_channel(SilcClientEntry client,
2695 SilcChannelEntry channel)
2697 if (!client || !channel)
2700 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2706 /* Timeout callback. This is called if connection is idle or for some
2707 other reason is not responding within some period of time. This
2708 disconnects the remote end. */
2710 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2712 SilcServer server = (SilcServer)context;
2713 SilcSocketConnection sock = server->sockets[fd];
2715 SILC_LOG_DEBUG(("Start"));
2720 /* If we have protocol active we must assure that we call the protocol's
2721 final callback so that all the memory is freed. */
2722 if (sock->protocol) {
2723 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2724 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2728 if (sock->user_data)
2729 silc_server_free_sock_user_data(server, sock);
2731 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2732 "Connection timeout");
2735 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2736 function may be used only by router. In real SILC network all channels
2737 are created by routers thus this function is never used by normal
2740 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2741 SilcServerID *router_id,
2747 SilcChannelID *channel_id;
2748 SilcChannelEntry entry;
2752 SILC_LOG_DEBUG(("Creating new channel"));
2755 cipher = "aes-256-cbc";
2757 hmac = "hmac-sha1-96";
2759 /* Allocate cipher */
2760 if (!silc_cipher_alloc(cipher, &key))
2764 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2765 silc_cipher_free(key);
2769 channel_name = strdup(channel_name);
2771 /* Create the channel */
2772 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2773 entry = silc_idlist_add_channel(server->local_list, channel_name,
2774 SILC_CHANNEL_MODE_NONE, channel_id,
2775 NULL, key, newhmac);
2777 silc_free(channel_name);
2778 silc_cipher_free(key);
2779 silc_hmac_free(newhmac);
2783 entry->cipher = strdup(cipher);
2784 entry->hmac_name = strdup(hmac);
2786 /* Now create the actual key material */
2787 silc_server_create_channel_key(server, entry,
2788 silc_cipher_get_key_len(key) / 8);
2790 /* Notify other routers about the new channel. We send the packet
2791 to our primary route. */
2792 if (broadcast && server->standalone == FALSE)
2793 silc_server_send_new_channel(server, server->router->connection, TRUE,
2794 channel_name, entry->id,
2795 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2798 server->stat.my_channels++;
2803 /* Same as above but creates the channel with Channel ID `channel_id. */
2806 silc_server_create_new_channel_with_id(SilcServer server,
2810 SilcChannelID *channel_id,
2813 SilcChannelEntry entry;
2817 SILC_LOG_DEBUG(("Creating new channel"));
2820 cipher = "aes-256-cbc";
2822 hmac = "hmac-sha1-96";
2824 /* Allocate cipher */
2825 if (!silc_cipher_alloc(cipher, &key))
2829 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2830 silc_cipher_free(key);
2834 channel_name = strdup(channel_name);
2836 /* Create the channel */
2837 entry = silc_idlist_add_channel(server->local_list, channel_name,
2838 SILC_CHANNEL_MODE_NONE, channel_id,
2839 NULL, key, newhmac);
2841 silc_free(channel_name);
2845 /* Now create the actual key material */
2846 silc_server_create_channel_key(server, entry,
2847 silc_cipher_get_key_len(key) / 8);
2849 /* Notify other routers about the new channel. We send the packet
2850 to our primary route. */
2851 if (broadcast && server->standalone == FALSE)
2852 silc_server_send_new_channel(server, server->router->connection, TRUE,
2853 channel_name, entry->id,
2854 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2857 server->stat.my_channels++;
2862 /* Channel's key re-key timeout callback. */
2864 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2866 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2867 SilcServer server = (SilcServer)rekey->context;
2869 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2870 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2872 silc_task_register(server->timeout_queue, 0,
2873 silc_server_channel_key_rekey,
2874 (void *)rekey, 3600, 0,
2876 SILC_TASK_PRI_NORMAL);
2879 /* Generates new channel key. This is used to create the initial channel key
2880 but also to re-generate new key for channel. If `key_len' is provided
2881 it is the bytes of the key length. */
2883 void silc_server_create_channel_key(SilcServer server,
2884 SilcChannelEntry channel,
2888 unsigned char channel_key[32], hash[32];
2891 SILC_LOG_DEBUG(("Generating channel key"));
2893 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2894 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2898 if (!channel->channel_key)
2899 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2904 else if (channel->key_len)
2905 len = channel->key_len / 8;
2907 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2909 /* Create channel key */
2910 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2913 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2915 /* Remove old key if exists */
2917 memset(channel->key, 0, channel->key_len / 8);
2918 silc_free(channel->key);
2922 channel->key_len = len * 8;
2923 channel->key = silc_calloc(len, sizeof(*channel->key));
2924 memcpy(channel->key, channel_key, len);
2925 memset(channel_key, 0, sizeof(channel_key));
2927 /* Generate HMAC key from the channel key data and set it */
2929 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2930 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2931 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2932 memset(hash, 0, sizeof(hash));
2934 if (server->server_type == SILC_ROUTER) {
2935 if (!channel->rekey)
2936 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2937 channel->rekey->context = (void *)server;
2938 channel->rekey->channel = channel;
2939 channel->rekey->key_len = key_len;
2941 silc_task_unregister_by_callback(server->timeout_queue,
2942 silc_server_channel_key_rekey);
2943 silc_task_register(server->timeout_queue, 0,
2944 silc_server_channel_key_rekey,
2945 (void *)channel->rekey, 3600, 0,
2947 SILC_TASK_PRI_NORMAL);
2951 /* Saves the channel key found in the encoded `key_payload' buffer. This
2952 function is used when we receive Channel Key Payload and also when we're
2953 processing JOIN command reply. Returns entry to the channel. */
2955 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2956 SilcBuffer key_payload,
2957 SilcChannelEntry channel)
2959 SilcChannelKeyPayload payload = NULL;
2960 SilcChannelID *id = NULL;
2961 unsigned char *tmp, hash[32];
2965 SILC_LOG_DEBUG(("Start"));
2967 /* Decode channel key payload */
2968 payload = silc_channel_key_payload_parse(key_payload);
2970 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2975 /* Get the channel entry */
2978 /* Get channel ID */
2979 tmp = silc_channel_key_get_id(payload, &tmp_len);
2980 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2986 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2988 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2990 SILC_LOG_ERROR(("Received key for non-existent channel"));
2996 tmp = silc_channel_key_get_key(payload, &tmp_len);
3002 cipher = silc_channel_key_get_cipher(payload, NULL);
3008 /* Remove old key if exists */
3010 memset(channel->key, 0, channel->key_len / 8);
3011 silc_free(channel->key);
3012 silc_cipher_free(channel->channel_key);
3015 /* Create new cipher */
3016 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3021 if (channel->cipher)
3022 silc_free(channel->cipher);
3023 channel->cipher = strdup(cipher);
3026 channel->key_len = tmp_len * 8;
3027 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3028 memcpy(channel->key, tmp, tmp_len);
3029 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3031 /* Generate HMAC key from the channel key data and set it */
3033 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3034 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3035 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3037 memset(hash, 0, sizeof(hash));
3038 memset(tmp, 0, tmp_len);
3040 if (server->server_type == SILC_ROUTER) {
3041 if (!channel->rekey)
3042 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3043 channel->rekey->context = (void *)server;
3044 channel->rekey->channel = channel;
3046 silc_task_unregister_by_callback(server->timeout_queue,
3047 silc_server_channel_key_rekey);
3048 silc_task_register(server->timeout_queue, 0,
3049 silc_server_channel_key_rekey,
3050 (void *)channel->rekey, 3600, 0,
3052 SILC_TASK_PRI_NORMAL);
3059 silc_channel_key_payload_free(payload);
3064 /* Heartbeat callback. This function is set as argument for the
3065 silc_socket_set_heartbeat function. The library will call this function
3066 at the set time interval. */
3068 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3071 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3073 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3076 /* Send the heartbeat */
3077 silc_server_send_heartbeat(hb->server, sock);
3080 /* Returns assembled of all servers in the given ID list. The packet's
3081 form is dictated by the New ID payload. */
3083 static void silc_server_announce_get_servers(SilcServer server,
3085 SilcBuffer *servers)
3087 SilcIDCacheList list;
3088 SilcIDCacheEntry id_cache;
3089 SilcServerEntry entry;
3092 /* Go through all clients in the list */
3093 if (silc_idcache_get_all(id_list->servers, &list)) {
3094 if (silc_idcache_list_first(list, &id_cache)) {
3096 entry = (SilcServerEntry)id_cache->context;
3098 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3100 *servers = silc_buffer_realloc(*servers,
3102 (*servers)->truelen + idp->len :
3104 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3105 silc_buffer_put(*servers, idp->data, idp->len);
3106 silc_buffer_pull(*servers, idp->len);
3107 silc_buffer_free(idp);
3109 if (!silc_idcache_list_next(list, &id_cache))
3114 silc_idcache_list_free(list);
3118 /* This function is used by router to announce existing servers to our
3119 primary router when we've connected to it. */
3121 void silc_server_announce_servers(SilcServer server)
3123 SilcBuffer servers = NULL;
3125 SILC_LOG_DEBUG(("Announcing servers"));
3127 /* Get servers in local list */
3128 silc_server_announce_get_servers(server, server->local_list, &servers);
3130 /* Get servers in global list */
3131 silc_server_announce_get_servers(server, server->global_list, &servers);
3134 silc_buffer_push(servers, servers->data - servers->head);
3135 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3137 /* Send the packet */
3138 silc_server_packet_send(server, server->router->connection,
3139 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3140 servers->data, servers->len, TRUE);
3142 silc_buffer_free(servers);
3146 /* Returns assembled packet of all clients in the given ID list. The
3147 packet's form is dictated by the New ID Payload. */
3149 static void silc_server_announce_get_clients(SilcServer server,
3151 SilcBuffer *clients)
3153 SilcIDCacheList list;
3154 SilcIDCacheEntry id_cache;
3155 SilcClientEntry client;
3158 /* Go through all clients in the list */
3159 if (silc_idcache_get_all(id_list->clients, &list)) {
3160 if (silc_idcache_list_first(list, &id_cache)) {
3162 client = (SilcClientEntry)id_cache->context;
3164 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3166 *clients = silc_buffer_realloc(*clients,
3168 (*clients)->truelen + idp->len :
3170 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3171 silc_buffer_put(*clients, idp->data, idp->len);
3172 silc_buffer_pull(*clients, idp->len);
3173 silc_buffer_free(idp);
3175 if (!silc_idcache_list_next(list, &id_cache))
3180 silc_idcache_list_free(list);
3184 /* This function is used to announce our existing clients to our router
3185 when we've connected to it. */
3187 void silc_server_announce_clients(SilcServer server)
3189 SilcBuffer clients = NULL;
3191 SILC_LOG_DEBUG(("Announcing clients"));
3193 /* Get clients in local list */
3194 silc_server_announce_get_clients(server, server->local_list,
3197 /* As router we announce our global list as well */
3198 if (server->server_type == SILC_ROUTER)
3199 silc_server_announce_get_clients(server, server->global_list,
3203 silc_buffer_push(clients, clients->data - clients->head);
3204 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3206 /* Send the packet */
3207 silc_server_packet_send(server, server->router->connection,
3208 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3209 clients->data, clients->len, TRUE);
3211 silc_buffer_free(clients);
3216 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3221 return silc_notify_payload_encode(notify, argc, ap);
3224 /* Returns assembled packets for channel users of the `channel'. */
3226 void silc_server_announce_get_channel_users(SilcServer server,
3227 SilcChannelEntry channel,
3228 SilcBuffer *channel_users,
3229 SilcBuffer *channel_users_modes)
3231 SilcChannelClientEntry chl;
3232 SilcHashTableList htl;
3233 SilcBuffer chidp, clidp;
3236 unsigned char mode[4];
3238 SILC_LOG_DEBUG(("Start"));
3240 /* Now find all users on the channel */
3241 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3242 silc_hash_table_list(channel->user_list, &htl);
3243 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3244 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3247 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3248 clidp->data, clidp->len,
3249 chidp->data, chidp->len);
3252 silc_buffer_realloc(*channel_users,
3254 (*channel_users)->truelen + len : len));
3255 silc_buffer_pull_tail(*channel_users,
3256 ((*channel_users)->end -
3257 (*channel_users)->data));
3259 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3260 silc_buffer_pull(*channel_users, len);
3261 silc_buffer_free(tmp);
3263 /* CUMODE notify for mode change on the channel */
3264 SILC_PUT32_MSB(chl->mode, mode);
3265 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3266 3, clidp->data, clidp->len,
3268 clidp->data, clidp->len);
3270 *channel_users_modes =
3271 silc_buffer_realloc(*channel_users_modes,
3272 (*channel_users_modes ?
3273 (*channel_users_modes)->truelen + len : len));
3274 silc_buffer_pull_tail(*channel_users_modes,
3275 ((*channel_users_modes)->end -
3276 (*channel_users_modes)->data));
3278 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3279 silc_buffer_pull(*channel_users_modes, len);
3280 silc_buffer_free(tmp);
3282 silc_buffer_free(clidp);
3284 silc_buffer_free(chidp);
3287 /* Returns assembled packets for all channels and users on those channels
3288 from the given ID List. The packets are in the form dictated by the
3289 New Channel and New Channel User payloads. */
3291 void silc_server_announce_get_channels(SilcServer server,
3293 SilcBuffer *channels,
3294 SilcBuffer *channel_users,
3295 SilcBuffer **channel_users_modes,
3296 uint32 *channel_users_modes_c,
3297 SilcChannelID ***channel_ids)
3299 SilcIDCacheList list;
3300 SilcIDCacheEntry id_cache;
3301 SilcChannelEntry channel;
3306 int i = *channel_users_modes_c;
3308 SILC_LOG_DEBUG(("Start"));
3310 /* Go through all channels in the list */
3311 if (silc_idcache_get_all(id_list->channels, &list)) {
3312 if (silc_idcache_list_first(list, &id_cache)) {
3314 channel = (SilcChannelEntry)id_cache->context;
3316 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3317 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3318 name_len = strlen(channel->channel_name);
3320 len = 4 + name_len + id_len + 4;
3322 silc_buffer_realloc(*channels,
3323 (*channels ? (*channels)->truelen + len : len));
3324 silc_buffer_pull_tail(*channels,
3325 ((*channels)->end - (*channels)->data));
3326 silc_buffer_format(*channels,
3327 SILC_STR_UI_SHORT(name_len),
3328 SILC_STR_UI_XNSTRING(channel->channel_name,
3330 SILC_STR_UI_SHORT(id_len),
3331 SILC_STR_UI_XNSTRING(cid, id_len),
3332 SILC_STR_UI_INT(channel->mode),
3334 silc_buffer_pull(*channels, len);
3336 *channel_users_modes = silc_realloc(*channel_users_modes,
3337 sizeof(**channel_users_modes) *
3339 (*channel_users_modes)[i] = NULL;
3340 *channel_ids = silc_realloc(*channel_ids,
3341 sizeof(**channel_ids) * (i + 1));
3342 (*channel_ids)[i] = NULL;
3343 silc_server_announce_get_channel_users(server, channel,
3345 channel_users_modes[i]);
3346 (*channel_ids)[i] = channel->id;
3349 if (!silc_idcache_list_next(list, &id_cache))
3353 *channel_users_modes_c += i;
3356 silc_idcache_list_free(list);
3360 /* This function is used to announce our existing channels to our router
3361 when we've connected to it. This also announces the users on the
3362 channels to the router. */
3364 void silc_server_announce_channels(SilcServer server)
3366 SilcBuffer channels = NULL, channel_users = NULL;
3367 SilcBuffer *channel_users_modes = NULL;
3368 uint32 channel_users_modes_c = 0;
3369 SilcChannelID **channel_ids = NULL;
3371 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3373 /* Get channels and channel users in local list */
3374 silc_server_announce_get_channels(server, server->local_list,
3375 &channels, &channel_users,
3376 &channel_users_modes,
3377 &channel_users_modes_c,
3380 /* Get channels and channel users in global list */
3381 silc_server_announce_get_channels(server, server->global_list,
3382 &channels, &channel_users,
3383 &channel_users_modes,
3384 &channel_users_modes_c,
3388 silc_buffer_push(channels, channels->data - channels->head);
3389 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3391 /* Send the packet */
3392 silc_server_packet_send(server, server->router->connection,
3393 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3394 channels->data, channels->len,
3397 silc_buffer_free(channels);
3400 if (channel_users) {
3401 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3402 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3403 channel_users->len);
3405 /* Send the packet */
3406 silc_server_packet_send(server, server->router->connection,
3407 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3408 channel_users->data, channel_users->len,
3411 silc_buffer_free(channel_users);
3414 if (channel_users_modes) {
3417 for (i = 0; i < channel_users_modes_c; i++) {
3418 silc_buffer_push(channel_users_modes[i],
3419 channel_users_modes[i]->data -
3420 channel_users_modes[i]->head);
3421 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3422 channel_users_modes[i]->len);
3423 silc_server_packet_send_dest(server, server->router->connection,
3424 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3425 channel_ids[i], SILC_ID_CHANNEL,
3426 channel_users_modes[i]->data,
3427 channel_users_modes[i]->len,
3429 silc_buffer_free(channel_users_modes[i]);
3431 silc_free(channel_users_modes);
3432 silc_free(channel_ids);
3436 /* Failure timeout callback. If this is called then we will immediately
3437 process the received failure. We always process the failure with timeout
3438 since we do not want to blindly trust to received failure packets.
3439 This won't be called (the timeout is cancelled) if the failure was
3440 bogus (it is bogus if remote does not close the connection after sending
3443 SILC_TASK_CALLBACK(silc_server_failure_callback)
3445 SilcServerFailureContext f = (SilcServerFailureContext)context;
3447 if (f->sock->protocol) {
3448 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3449 silc_protocol_execute(f->sock->protocol, f->server->timeout_queue, 0, 0);
3455 /* Assembles user list and users mode list from the `channel'. */
3457 void silc_server_get_users_on_channel(SilcServer server,
3458 SilcChannelEntry channel,
3459 SilcBuffer *user_list,
3460 SilcBuffer *mode_list,
3463 SilcChannelClientEntry chl;
3464 SilcHashTableList htl;
3465 SilcBuffer client_id_list;
3466 SilcBuffer client_mode_list;
3468 uint32 list_count = 0;
3470 /* XXX rewrite - this does not support IPv6 based Client ID's. */
3473 silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3474 silc_hash_table_count(channel->user_list));
3476 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3477 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3478 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3479 silc_hash_table_list(channel->user_list, &htl);
3480 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3482 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3483 silc_buffer_put(client_id_list, idp->data, idp->len);
3484 silc_buffer_pull(client_id_list, idp->len);
3485 silc_buffer_free(idp);
3487 /* Client's mode on channel */
3488 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3489 silc_buffer_pull(client_mode_list, 4);
3493 silc_buffer_push(client_id_list,
3494 client_id_list->data - client_id_list->head);
3495 silc_buffer_push(client_mode_list,
3496 client_mode_list->data - client_mode_list->head);
3498 *user_list = client_id_list;
3499 *mode_list = client_mode_list;
3500 *user_count = list_count;
3503 /* Saves users and their modes to the `channel'. */
3505 void silc_server_save_users_on_channel(SilcServer server,
3506 SilcSocketConnection sock,
3507 SilcChannelEntry channel,
3508 SilcClientID *noadd,
3509 SilcBuffer user_list,
3510 SilcBuffer mode_list,
3515 /* Cache the received Client ID's and modes. This cache expires
3516 whenever server sends notify message to channel. It means two things;
3517 some user has joined or leaved the channel. XXX TODO! */
3518 for (i = 0; i < user_count; i++) {
3521 SilcClientID *client_id;
3522 SilcClientEntry client;
3525 SILC_GET16_MSB(idp_len, user_list->data + 2);
3527 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3528 silc_buffer_pull(user_list, idp_len);
3533 SILC_GET32_MSB(mode, mode_list->data);
3534 silc_buffer_pull(mode_list, 4);
3536 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3537 silc_free(client_id);
3541 /* Check if we have this client cached already. */
3542 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3545 client = silc_idlist_find_client_by_id(server->global_list,
3548 /* If router did not find such Client ID in its lists then this must
3549 be bogus client or some router in the net is buggy. */
3550 if (server->server_type == SILC_ROUTER) {
3551 silc_free(client_id);
3555 /* We don't have that client anywhere, add it. The client is added
3556 to global list since server didn't have it in the lists so it must be
3558 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3559 silc_id_dup(client_id, SILC_ID_CLIENT),
3560 sock->user_data, NULL);
3562 silc_free(client_id);
3566 client->data.registered = TRUE;
3569 silc_free(client_id);
3571 if (!silc_server_client_on_channel(client, channel)) {
3572 /* Client was not on the channel, add it. */
3573 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3574 chl->client = client;
3576 chl->channel = channel;
3577 silc_hash_table_add(channel->user_list, chl->client, chl);
3578 silc_hash_table_add(client->channels, chl->channel, chl);
3583 /* Lookups route to the client indicated by the `id_data'. The connection
3584 object and internal data object is returned. Returns NULL if route
3585 could not be found to the client. If the `client_id' is specified then
3586 it is used and the `id_data' is ignored. */
3588 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3589 unsigned char *id_data,
3591 SilcClientID *client_id,
3592 SilcIDListData *idata)
3595 SilcClientEntry client;
3597 SILC_LOG_DEBUG(("Start"));
3599 /* Decode destination Client ID */
3601 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3603 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3607 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3610 /* If the destination belongs to our server we don't have to route
3611 the packet anywhere but to send it to the local destination. */
3612 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3616 if (client && client->data.registered == FALSE)
3619 /* If we are router and the client has router then the client is in
3620 our cell but not directly connected to us. */
3621 if (server->server_type == SILC_ROUTER && client->router) {
3622 /* We are of course in this case the client's router thus the real
3623 "router" of the client is the server who owns the client. Thus
3624 we will send the packet to that server. */
3626 *idata = (SilcIDListData)client->router;
3627 return client->router->connection;
3630 /* Seems that client really is directly connected to us */
3632 *idata = (SilcIDListData)client;
3633 return client->connection;
3636 /* Destination belongs to someone not in this server. If we are normal
3637 server our action is to send the packet to our router. */
3638 if (server->server_type == SILC_SERVER && !server->standalone) {
3641 *idata = (SilcIDListData)server->router;
3642 return server->router->connection;
3645 /* We are router and we will perform route lookup for the destination
3646 and send the packet to fastest route. */
3647 if (server->server_type == SILC_ROUTER && !server->standalone) {
3648 /* Check first that the ID is valid */
3649 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3651 SilcSocketConnection dst_sock;
3653 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3657 *idata = (SilcIDListData)dst_sock->user_data;
3666 /* Encodes and returns channel list of channels the `client' has joined.
3667 Secret channels are not put to the list. */
3669 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3670 SilcClientEntry client)
3672 SilcBuffer buffer = NULL;
3673 SilcChannelEntry channel;
3674 SilcChannelClientEntry chl;
3675 SilcHashTableList htl;
3681 silc_hash_table_list(client->channels, &htl);
3682 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3683 channel = chl->channel;
3685 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3688 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3689 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3690 name_len = strlen(channel->channel_name);
3692 len = 4 + name_len + id_len + 4;
3693 buffer = silc_buffer_realloc(buffer,
3694 (buffer ? (buffer)->truelen + len : len));
3695 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3696 silc_buffer_format(buffer,
3697 SILC_STR_UI_SHORT(name_len),
3698 SILC_STR_UI_XNSTRING(channel->channel_name,
3700 SILC_STR_UI_SHORT(id_len),
3701 SILC_STR_UI_XNSTRING(cid, id_len),
3702 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3704 silc_buffer_pull(buffer, len);
3709 silc_buffer_push(buffer, buffer->data - buffer->head);
3714 /* Finds client entry by Client ID and if it is not found then resolves
3715 it using WHOIS command. */
3717 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3718 SilcClientID *client_id)
3720 SilcClientEntry client;
3722 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3724 client = silc_idlist_find_client_by_id(server->global_list,
3726 if (!client && server->server_type == SILC_ROUTER)
3730 if (!client && server->standalone)
3733 if (!client || !client->nickname || !client->username) {
3734 SilcBuffer buffer, idp;
3736 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3737 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3738 ++server->cmd_ident, 1,
3739 3, idp->data, idp->len);
3740 silc_server_packet_send(server, client ? client->router->connection :
3741 server->router->connection,
3742 SILC_PACKET_COMMAND, 0,
3743 buffer->data, buffer->len, FALSE);
3744 silc_buffer_free(idp);
3745 silc_buffer_free(buffer);
3751 /* A timeout callback for the re-key. We will be the initiator of the
3754 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3756 SilcSocketConnection sock = (SilcSocketConnection)context;
3757 SilcIDListData idata = (SilcIDListData)sock->user_data;
3758 SilcServer server = (SilcServer)idata->rekey->context;
3759 SilcProtocol protocol;
3760 SilcServerRekeyInternalContext *proto_ctx;
3762 SILC_LOG_DEBUG(("Start"));
3764 /* Allocate internal protocol context. This is sent as context
3766 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3767 proto_ctx->server = (void *)server;
3768 proto_ctx->sock = sock;
3769 proto_ctx->responder = FALSE;
3770 proto_ctx->pfs = idata->rekey->pfs;
3772 /* Perform rekey protocol. Will call the final callback after the
3773 protocol is over. */
3774 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3775 &protocol, proto_ctx, silc_server_rekey_final);
3776 sock->protocol = protocol;
3778 /* Run the protocol */
3779 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
3781 /* Re-register re-key timeout */
3782 silc_task_register(server->timeout_queue, sock->sock,
3783 silc_server_rekey_callback,
3784 context, idata->rekey->timeout, 0,
3785 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3788 /* The final callback for the REKEY protocol. This will actually take the
3789 new key material into use. */
3791 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3793 SilcProtocol protocol = (SilcProtocol)context;
3794 SilcServerRekeyInternalContext *ctx =
3795 (SilcServerRekeyInternalContext *)protocol->context;
3796 SilcServer server = (SilcServer)ctx->server;
3797 SilcSocketConnection sock = ctx->sock;
3799 SILC_LOG_DEBUG(("Start"));
3801 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3802 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3803 /* Error occured during protocol */
3804 silc_protocol_cancel(protocol, server->timeout_queue);
3805 silc_protocol_free(protocol);
3806 sock->protocol = NULL;
3808 silc_packet_context_free(ctx->packet);
3810 silc_ske_free(ctx->ske);
3816 silc_protocol_free(protocol);
3817 sock->protocol = NULL;
3819 silc_packet_context_free(ctx->packet);
3821 silc_ske_free(ctx->ske);